Text

Annual Radiological Environmental Operating Report for 2011
	ML12145A591
Person / Time
Site:	Cook
Issue date:	05/09/2012
From:	Gebbie J; Indiana Michigan Power Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	AEP-NRC-2012-22
	Download: ML12145A591 (337)
	v • d • e

INDIANA MICHIGAN Indiana Michigan Power One Cook Place POWERE Bridgman, Ml 49106 A unit of American Electric Power IndianaMichiganPower.com May 9, 2012 AEP-NRC-2012-22 10 CFR 50, Appendix I 10 CFR 50.36a(a)(2)

Docket Nos.: 50-315 50-316 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Donald C. Cook Nuclear Plant Units 1 and 2 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT In accordance with Technical Specification 5.6.2, Indiana Michigan Power Company (I&M), the licensee for Donald C. Cook Nuclear Plant (CNP) Units 1 and 2, is providing the Annual Radiological Environmental Operating Report (AREOR) as an enclosure to this letter. This report covers the period January 1, 2011, through December 31, 2011.

In a letter dated May, 13, 2011, I&M submitted the 2010 Annual Radiological Environmental Operating Report with an error on page 67. The correction of this error is provided in the 2011 Annual Radiological Environmental Operating Report, Section 8.0, "ERATA FROM 2010 AREOR."

This letter contains no new or modified regulatory commitments. Should you have any questions, please contact Mr. Michael K. Scarpello, Regulatory Affairs Manager, at (269) 466-2649.

Sincerely, Joel P. Gebbie Site Vice President KMH/jmr

Enclosure:

Annual Radiological Environmental Operating Report

U. S. Nuclear Regulatory Commission AEP-NRC-2012-22 Page 2 c: J. T. King, MPSC, w/o enclosure S. M. Krawec, Ft. Wayne AEP, w/o enclosure MDEQ - RMD/RPS NRC Resident Inspector C. D. Pederson, NRC Region III P. S. Tam, NRC, Washington DC

ENCLOSURE TO AEP-NRC-2012-22 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT

Annual Radiological Environmental Operating Report Indiana Michigan Power Company Donald C. Cook Nuclear Plant RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM January 1, 2011 - December 31, 2011 Docket No. 50-315, 50-316 License No. DPR-58, DPR-74 AREVA Doc. 47-9176547-000 A

Donald C. Cook Nuclear Plant - Annual Radiological Environmental Operating Report 2011 TABLE OF CONTENTS Paqe 1.0 EXECUTIVE SUM MARY .............................................................................................. 4 2.0 INTRO DUCTIO N .................................................................................................... 5 2.1 General Plant Site Inform ation ............................................................................ 5 2.2 Program Design .................................................................................................. 5 2.3 Monitoring Zones ............................................................................................ 6 2.4 Pathways Monitored ...................................................................................... 6 2.5 Descriptions of Monitoring Pathways .............................................................. 7 2.5.1 Air ................................................................................................... .7 2.5.2 Surface W ater .................................................................................... 7 2.5.3 G roundwater ..................................................................................... 7 2.5.4 Drinking W ater ....................................................................................... 8 2.5.5 Sedim ent ............................................................................................. 8 2.5.6 Milk ...................................................................................................... 8 2.5.7 Fish ..................................................................................................... 8 2.5.8 Food Product ...................................................................................... .9 2.5.9 Broadleaf Vegetation ............................................................................ 9 2.5.10 TLD Monitoring ................................................................................... 9 2.5.11 Additional Groundwater Sample Analysis (non-ODCM required) ...... 9 2.5.12 Additional Groundwater Sample Analysis (NEI Groundwater Protection Initiative) .......................................................................................................... 9 2.6 Sam ples Collected During 2011 ..................................................................... 19 3.0 RADIO LO GICAL DATA SUM MARY TABLES .......................................................... 20 4.0 ANALYSIS O F ENVIRO NM ENTAL RESULTS ......................................................... 55 4.1 Sam pling Program Deviations ........................................................................ 55 4.2 Com parison of Achieved LLD with Requirem ents .......................................... 57 4.3 Results Com pared Against Reporting Levels ................................................ 59 4.4 Data Analysis by Media Type - Discussion ................................................. 59 4.4.1 Air Particulate ................................................................................... 59 4.4.2 Airborne Iodine ................................................... 61 4.4.3 G roundwater (W ell) ............................................................................ 62

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 TABLE OF CONTENTS (continued)

Pa.er 4.4.4 D rinking W ater ................................................................................... 65 4.4.5 Surface W ater ........................................................................................ 66 4.4.6 Sedim ent ................................................................................................ 67 4.4.7 Milk ............................................................................. 67 4.4.8 Food Products & Vegetation ............................................................. 68 4 .4 .9 F ish ................................................. ............................................... . . 6 8 4.4.10 Gam m a Exposure Rate ..................................................................... 69 4.4.11 Additional Sample Analysis (non-ODCM required samples) ................... 70 5.0 OFF-SITE DOSE EQUIVALENT COMMITMENTS .................................................. 72 6.0

SUMMARY

OF REMP, ODCM, AND VENDOR PROCEDURE CHANGES .............. 75 7 .0 R E F E R ENC E S .............................................................................................................. 91 8.0 ERATA FRO M 2010 AREO R .................................................................................... 91 APPENDIX A: SYNOPSIS OF ANALYSIS TECHNIQUES .......................... A-1 APPENDIX B: 2011 LAND USE CENSUS ......................................................................... B-1 APPENDIX C: QUALITY ASSURANCE PROGRAM ...... *.................................................... C-1 APPENDIX D: 2011 DATA

SUMMARY

.............................................................................. D-1 APPENDIX E: PRE-OPERATIONAL RADIOLOGICAL MONITORING PROGRAM ............ E-1 APPENDIX F: NEI GROUNDWATER PROTECTION INITIATIVE .................... F-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 1.0 EXECUTIVE

SUMMARY

Implementation of the Donald C. Cook Nuclear Plant (CNP) Radiological Environmental Monitoring Program (REMP) continued during the period January through December 2011, in accordance with station Technical Specifications and the Off-Site Dose Calculation Manual (ODCM).

Radiochemical and radiometric analyses of REMP samples were performed to allow for detection and quantification of station-related radioactivity. A variety of potential exposure pathways were monitored by analyzing air, fruit, vegetation, water, milk, fish and sediment samples. Thermoluminescent dosimeters (TLDs) were also utilized to monitor for gamma radiation exposure that might be attributed to plant activities.

Evaluation of sample analyses results considered the variability of natural or man-made radioactivity sources including their distribution and uptake in the environment and environmental media. This variability depends on several possible factors such as:

contributions from cosmogenic. radioactivity,

groundwater dynamics,

station related release rates,

past spatial variability of radioactive fallout from nuclear weapons tests and the on-going redistribution of this fallout,

soil characteristics,

farming practices, and

feed type.

Since these factors had the potential to cause considerable variation in sample analysis results, they were considered during the evaluation of sample analysis results.

Based on an evaluation of sample analyses results, it was determined that non-tritium radioactivity detected by the REMP was from outside sources, such as fallout from nuclear weapons tests and naturally-occurring radionuclides. The recent accident at Fukushima Daiichi provided the largest source of changes to the non-plant related sources of radioactivity for the year. Examples include the following:

All four of the lake sediment samples contained naturally-occurring K-40, one sample contained naturally-occurring Be-7, two samples contained naturally-occurring Th-228 and one contained naturally-occurring Ac-228.

Naturally-occurring K-40 was detected in all ten fish samples, seven of which contained Cs-1 37. These results are likely the result of Fukushima fallout.

Both indicator and control food products samples (grapes) contained naturally-occurring K-40 and Be-7. All but one sample of broadleaf vegetation contained naturally-occurring K-40 and all samples contained naturally-occurring Be-7. Two samples contained naturally-occurring Ac-228. Additionally, five of thirty indicator samples contained low levels of Cs-137. The source of this

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report_2011 nuclide in these samples is likely to be from Fukushima fallout given the time frame. An additional historic source is past weapons testing in the atmosphere.

Sixteen of 142 water samples (drinking, ground, and surface) indicated the presence of naturally-occurring K-40. Tritium was detected in ten of 68 ground water samples. Site tritium modeling has indicated that the activity in most of these samples is the result of tritium recapture via precipitation through gaseous releases out the unit vent. The remaining samples containing tritium were due to an outage related release of radioactive water to the plant's Absorption Pond via the Turbine Room Sump (TRS) during the last week in October of 2010. The TRS is a licensed release pathway and the appearance of tritium in these wells was anticipated. Tracking of well activity is performed at CNP via the REMP and Groundwater Protection Programs. This tritium has no impact on public health and safety and is the result of effluent releases performed via licensed released paths and are well within NRC limits.

All 77 milk samples, from both indicator and control locations, detected naturally-occurring K-40. Two samples from an indicator location showed indications of 1-131 and one indicated Cs-1 37. The 1-131 and Cs-137 activity.

likely originated from the Fukushima accident.

The quarterly composite of the air particulate samples all contained naturally-occurring Be-7, with one control location containing naturally-occurring K-40. Cs-137 was detected in two indicator samples and one control sample. The Cs-137 was found to be consistent with airborne contamination associated with the Fukushima accident.

The charcoal air filters were found to contain 1-131 in 27 of the 519 samples originating from both control and indicator locations. The 1-131 activity likely originated from the Fukushima accident.

No sample analysis results exceeded or approached specified reporting levels.

This report was prepared for Indiana Michigan Power Company by AREVA NP, Inc.

Sample collection and preparation were performed by CNP. Laboratory analyses were performed by GEL Laboratories. TLD analyses were performed by Environmental Dosimetry Company.

2.0 INTRODUCTION

2.1 General Plant Site Information Indiana Michigan Power Company's CNP is located on the southeastern shore of Lake Michigan approximately one mile north of Bridgman, Michigan. The site consists of two pressurized water reactors: Unit 1, 1084 MWe (Net Design Electrical Rating) and Unit 2, 1107 MWe (Net Design Electrical Rating). Unit 1 achieved initial criticality on January 18, 1975, and Unit 2 on March 10, 1978.

2.2 Program Design The REMP for CNP was designed with specific objectives:

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 To provide an early indication of the appearance or accumulation of radioactive material in the environment possibly caused by CNP activities.

To provide assurance to regulatory agencies and the public that the environmental/dose impact of the CNP operation is known and within anticipated limits.

To verify the adequacy and proper functioning of station effluent controls and monitoring systems.

To comply with regulatory requirements and station Technical Specifications and provide records to document compliance.

The program was developed to meet the intent of NRC Regulatory Guide 4.1 (Revision 1), "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants"; NRC Regulatory Guide 4.8, "Environmental Technical Specifications for Nuclear Power Plants"; the NRC Branch Technical Position of November 1979, "An Acceptable Radiological Environmental Monitoring Program"; and NRC NUREG-0472, "Standard Radiological Effluent Technical Specifications for Pressurized Water Reactors".

The REMP sampling requirements are given in Attachment 3.19 of the ODCM and summarized in Table 2.1 of this report. The identification of the required sampling locations is also provided in Attachment 3.19 of the ODCM and Table 2.2 of this report. The monitoring locations are shown graphically in Figures 2.1 - 2.3.

2.3 Monitoring Zones The REMP is designed to allow comparison of levels of radioactivity in samples from the area potentially influenced by the plant to levels found in areas not influenced by the plant. Generally, monitoring zones are designated as "indicator" or "control" locations. For a particular pathway, the distinction between these designations is based on relative direction and distance from the plant. Sample analysis data from the two zones is evaluated and used to differentiate between radiation due to plant activities and that due to other sources (examples: nuclear weapons test fallout, external nuclear incidents and seasonal background variations).

2.4 Pathways Monitored Four pathway categories (airborne, waterborne, ingestion, and direct radiation) were monitored by the REMP. Each of these categories was monitored by the collection of one or more sample types listed and described below.

Airborne Pathway: Air Waterborne Pathway: Surface Water Groundwater Drinking Water Sediment Ingestion Pathway: Milk

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Fish Food Product (Fruit and Broadleaf Vegetation)

Broadleaf Vegetation (in lieu of Milk, when necessary)

Direct Radiation: TLD Monitoring 2.5 Descriptions of Monitoring Pathways Sample types and frequency of analysis are given in Table 2.1. The sample locations are listed in Table 2.2 and shown in Figures 2.1 - 2:3. The program as described in this report includes both ODCM required and additional or supplemental samples. A description'of the ODCM sampling program follows, and a detailed summary of the analytical methodologies employed by GEL Laboratories is provided in Appendix A.

2.5.1 Air Air samplers were installed at ten locations as required by the ODCM.

These samplers operated continuously (except during weekly sample media replacement) within the specified sample flow rate range of 42 to 70 liters per minute (LPM). An Automatic Volume Totalizer was used to measure the total volume of air sampled, total unit run time and volumetric flow rate.

Airborne particulates were collected by passing air through a 47-mm particulate filter. Charcoal cartridges were installed downstream of the particulate filters and were used to collect airborne radioiodine. Both types of sample media were collected weekly, and to allow for the decay of radon daughter products, the particulate filters were held at least 100 hours0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months before being analyzed for gross-beta radioactivity.

The particulate filters were composited by location as part of the quarterly gamma spectroscopy analysis.

2.5.2 Surface Water Two 500-ml surface water samples were collected from shoreline locations approximately 500 feet north and south of the plant centerline.

Samples were composited daily, and the gamma aliquot was preserved with nitric acid. A gamma isotopic analysis was performed on a monthly composite from each sample point. A tritium analysis was performed on a quarterly composite from each sample point.

2.5.3 Groundwater Groundwater samples were collected quarterly from 17 wells, all within 4300 feet of the reactors. At each well, a static water elevation was determined and at least three well bore volumes were purged from the well using a groundwater pump or equivalent. Two 1-liter and two 125-ml samples were then collected and the gamma isotopic aliquot was

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 preserved with nitric acid. Gamma isotopic and tritium analyses were performed.

2.5.4 Drinking Water One-liter samples were collected daily at the intake of the water purification plants for St. Joseph and Lake Township. The daily samples were composited over 14 days and the gamma isotopic/gross beta aliquot was preserved with nitric acid. The 14-day composite samples were analyzed for gross beta, gamma isotopic and low level Iodine (1-131). A quarterly composite was analyzed for Tritium (H-3).

2.5.5 Sediment Lake Michigan shoreline sediment samples were collected semi-annually approximately 500 feet north and south of the plant centerline. A 1-liter sample was collected from an area covered part time by wave action at each location. The sediment samples were analyzed for gamma isotopic content.

2.5.6 Milk At least once every fifteen days, a one-gallon milk sample was collected from the three remaining available farms located between 4.4 and 21 miles from the site. Two of these farms (cow) utilize a "bulk" storage tank arrangement while the third farm (goat) does not. All samples were preserved with 40 grams per gallon of sodium bisulfite at the time of collection. Samples were analyzed for low level 1-131 and gamma-emitting radionuclides.

Due to the retirement of Glen Troy Farm's operator, the required number of indicator milk locations was not met in 2011. Though milk samples were collected at the remaining farms, the milk sampling program was considered suspended in 2011. Environmental personnel implemented broadleaf vegetation collection per the ODCM during the growing season as a result of not meeting the required number of milk indicator farms.

2.5.7 Fish Approximately four pounds of fish were collected two times a year from four locations using gill nets in Lake Michigan. The edible portions of the fish were analyzed for gamma-emitting radionuclides.

In addition to the bi-annual fish samples, 2011 saw the introduction of sampling fish species important to sport fishing. Sampling specifically for trout, salmon and perch in Lake Michigan once a year was added to the program. The same analysis is performed for the sport fish samples as that performed for the original REMP fish samples.

Donald t. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2.5.8 Food Product Two food product samples (grapes) were collected annually at the time of harvest. Samples consist of greater than 300 grams of media and were collected from the highest deposition factor land sectors near CNP, with media present, and at an approximate distance of 20 miles from the plant in one of the less prevalent deposition factor land sectors. Samples were analyzed for gamma-emitting radionuclides.

2.5.9 Broadleaf Vegetation Broadleaf vegetation sampling in lieu of milk collection was reinstated on December 16, 2004, and continued through 2011. This occurrence was necessitated by the retirement of an "indicator" milk farm operator and the inability to locate a suitable replacement farm via a special milk farm survey along with subsequent Annual Land Use Surveys. Two indicator and one control location were sampled monthly during the growing season (May - September). Three samples consisting of greater than 300 grams of media were collected from two different locations within 8 miles of the plant in the highest deposition factor land sectors with media present, and one sample at an approximate distance of 20 miles from the plant in one of the less prevalent deposition factor land sectors. Samples were analyzed for gamma-emitting radionuclides and low level 1-131.

2.5.10 TLD Monitoring Direct gamma radiation exposure was continuously monitored with the use of Panasonic UD-814 AS4 thermoluminescent dosimeters (TLDs).

TLDs were posted at 27 locations in the environs surrounding CNP and replaced quarterly.

2.5.11 Additional Groundwater Sample Analysis (non-ODCM required)

During 2011, additional groundwater samples not required by the ODCM were collected for informational purposes. These samples were collected at several onsite locations in 2011 and analyzed for gamma and tritium by GEL laboratories.

2.5.12 Additional Groundwater Sample Analysis (NEI Groundwater Protection Initiative)

The Groundwater Protection Initiative (GPI) sample data for 2011 indicates no groundwater contamination in excess of the reporting threshold of 2.OOE-5 gCi/mL for tritium.

The full discussion of the GPI sample data and analysis is contained in Appendix F.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 2.1 Sampling Frequency & Type of Analysis Based on ODCM, Rev. 23, Attachment 3.19 and 12-THP-6010-RPP-636 Rev. 4 Exposure Pathway Number of Sampling &

and/or Sample Locations Collection Type of Analysis Frequency

1. Gamma Exposure-Environmental TLD 27 Quarterly Direct Radiation - Quarterly Continuous Gross Beta and 1-131 - Weekly

2. Airborne 10 sampler - weekly Gamma Isotopic - Quarterly on filter change composite (by location)

Groundwater Gamma Isotopic and Tritium -

(Well Water) 17 Quarterly Quarterly

4. Surface Water 2 Onepedaleda Once per calendar 2 Gamma Isotopic - Monthly on composite day Tritium - Quarterly on composite Gamma Isotopic, Gross Beta 5 Once per calendar and 1-131 Low Level (LL) - on day 14 day composite. Tritium -

Quarterly on composite

6. Sediment 2 Semiannually Gamma Isotopic Lake Once every 15

7. Milk 4 days or Monthly if Gamma Isotopic and 1-131 Low (if available) animals are fed Level (LL) - per sample stored feed.

8. Fish (edible portion) 4 2 per year Gamma Isotopic - per sample

9. Fish (edible portion) 3 1 p,eryear Gamma Isotopic- per sample Perch, salmon and trout

10. Food Products- 2 At time of harvest Gamma Isotopic - per sample I_Grape Broadleaf Monthly when Gamma Isotopic and 1-131 Low of milk sampling) available Level (LL) - per sample

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 2.2 2011 Radiological Environmental Monitoring Program Sampling Types and Locations Exposure Pathway Sample Indicator/

(Sample Type Station Control Location Description Designation)

Airborne

a. Filter (AP/ CF) ONS-1 I 1945 feet @ 180 from Plant axis ONS-2 I 2338 feet @ 480 from Plant axis ONS-3 I 2407 feet @ 900 from Plant axis ONS-4 I 1852 feet @ 1180 from Plant axis ONS-5 I 1895 feet @ 1890 from Plant axis ONS-6 I 1917 feet @ 2100 from Plant axis NBF C 15.6 miles SSW - New Buffalo, MI SBN C 26.2 miles SE - South Bend, IN DOW C 24.3 miles ENE - Dowagiac, MI COL C 18.9 miles NNE - Coloma, MI Waterborne

a. Ground Well (WG) W-1 I 1969 feet @ 110 from Plant axis W-2 I 2302 feet @ 630 from Plant axis W-3 I 3279 feet @ 107 0 from Plant axis W-4 I 418 feet @ 3010 from Plant axis W-5 I 404 feet @ 2900 from Plant axis W-6 I 424 feet @ 2730 from Plant axis W-7 I 1895 feet @ 1890 from Plant axis W-8 I 1274 feet @ 540 from Plant axis W-9 I 1447 feet @ 22° from Plant axis W-10 I 4216 feet @ 1290 from Plant axis W-1 1 I 3206 feet @ 1530 from Plant axis W-12 I 2631 feet @ 1620 from Plant axis W-13 I 2152 feet @ 1820 from Plant axis W-14 I 1780 feet @ 1640 from Plant axis W-15 I 725 feet @ 202 0from Plant axis MW-20 I 2200 feet @ 208 0 from Plant axis (W-16)

MW-21 1 2200 feet @ 180 0from Plant axis (W-17)

b. Drinking (WD) STJ C 9 miles NE - St. Joseph Public Intake Station LTW 1 0.6 mile S - Lake Twp. Public Intake Station

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 2.2 2011 Radiological Environmental Monitoring Program Sampling Types and Location (continued)

Exposure Pathway Sample Indicator/

(Sample Type Station Control Location Description Designation)

c. Surface (WS) SWL-2 500 feet S of Plant Centerline - Site Boundary SWL-3 I 500 feet N of Plant Centerline - Site Boundary

d. Sediment (SE) SL-2 500 feet S of Plant Centerline - Site Boundary SL-3 I 500 feet N of Plant Centerline - Site Boundary Ingestion

a. Milk (TM) MR I 4.8 miles* SE - Baroda, MI SF I 4.4 miles* SSE - Baroda, MI LF C 21 miles* S - La Porte, IN

b. Fish (FH) ONS-N I 0.3 mile N, Lake Michigan ONS-S I 0.4 mile S, Lake Michigan Trout and salmon within 20 miles of CNP, Lake Michigan Perch within 10 miles of CNP, Lake Michigan OFS-N C 3.5 miles N, Lake Michigan OFS-S C 5.0 miles S, Lake Michigan

c. Food Products ONS-G I Nearest sample to Plant in the (TF) highest D/Q land sector containing grapes.

OFS-G C In a land sector containing grapes,

-20 miles from the Plant, in one of the less prevalent D/Q land Sectors

d. Vegetation (TV) ONS1-V I

[broadleaf vegetation ONS2-V Within 8 mi. in highest annual taken in lieu of milk J ONS3-V I average D/Q land Sector WELL-Sec A I Backup location only (Not used in 2011)

OFS-V C -20 miles from the Plant, in one of the less prevalent land wind directions in land sectors containing grapes.

Values measured with Garmin City Navigator North America software.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 2.2 2011 Radiological Environmental Monitoring Program Sampling Types and Location (continued)

T-1 1945 feet @ 180 from Plant axis TLD T-2 2338 feet @ 480 from Plant axis T-3 2407 feet @ 900 from Plant axis s T-4 1852 feet @ 1180 from Plant axi,s T-5 1895 feet @ 1890 from Plant axi.S T-6 1917 feet @ 2100 from Plant axi.

T-7 2103 feet @ 360 from Plant axis S T-8 2208 feet @ 820 from Plant axis T-9 1368 feet @ 1490 from Plant axi.

T-1 0 1390 feet @ 1270 from Plant axi,s T-1 1 1969 feet @ 110 from Plant axis T-1 2 2292 feet @ 630 from Plant axis NBF 15.6 miles SSW - New Buffalo, I\

SBN 26.2 miles SE - South Bend, IN DOW 24.3 miles ENE - Dowagiac, MI COL 18.9 miles NNE - Coloma, MI OFT-1 4.5 miles NE - Pole #B294-44 OFT-2 3.6 miles NE - Stevensville Subs;tation OFT-3 5.1 miles NE - Pole #B296-13 OFT-4 4.1 miles E - Pole #B350-72 OFT-5 4.2 miles ESE - Pole #B387-32 OFT-6 4.9 miles SE - Pole #B426-1 OFT-7 2.5 miles S - Bridgman Substatic *n OFT-8 4.0 miles S - Pole #B424-20 OFT-9 4.4 miles ESE - Pole #B369-214 OFT-10 3.8 miles S - Pole #B422-99 OFT-11 3.8 miles S - Pole #B423-12

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 2.3 Environmental Lower Limit of Detection (LLD) Sensitivity Requirements ODCM, Rev. 23, Attachment 3.20 Food Prod. Water Milk Air Filter Fish Sediment Analysis (pCi/kg, (pCi/L) (pCilL) (pCI*Im 3) (pCi/kg, (pCi/kg, wet) wet) dry)

Gross Beta 4 0.01 H-3 2000 Mn-54 15 130 Co-58 15 130 Co-60 15 130 Fe-59 30 260 Zn-65 30 260 Zr-95 30 Nb-95 15 1-131 60 1 1 0.07 Cs-134 60 15 15 0.06 130 150 Cs-137 60 18 18 0.06 150 180 Ba-140 60 60 La-140 15 15

LLD for drinking water

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 2.4 Reporting Levels for Radioactivity Concentrations in Environmental Samples ODCM Rev. 23, Attachment 3.21 Food Prod. Water Milk Airborne Fish Analysis (pCilkg, (pCi/L) Filter (pCilkg, wet) (pCiI/m 3) wet)

H-3 20000 Mn-54 1000 30000 Co-58 1000 30000 Co-60 300 10000 Fe-59 400 10000 Zn-65 300 20000 Zr-95 400 Nb-95 400 1-131 100 2 3 0.90 Cs-134 1000 30 60 10 1000 Cs-137 2000 50 70 20 2000 Ba-140 200 300 La-140 200 300

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 2.1 Donald C. Cook Nuclear Plant Sampling Locations - I Mile Radius (See Table 2.2 for information on sampling locations)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 2.2 Donald C. Cook Nuclear Plant Sampling Locations - 10 Mile Radius (See Table 2.2 for information on sampling locations)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 2.3 Donald C. Cook Nuclear Plant Sampling Locations - 26 Mile Radius (See Table 2.2 for information on sampling locations)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2.6 Samples Collected During 2011 f

Table 2.5 below summarizes the number of samples of each type collected during the 2011 reporting period and the number of analyses by station type for each media. A more detailed breakdown of the various analyses performed is provided in the data summary tables in Section 3, Table 3.1.

Table 2.5 REMP Samples Collected in 2011 Sample Type REMP Samples Collected in 2011 Total Indicator Control Gamma Exposure 108 92 16 Environmental TLD Air Particulate 519 311 208 Charcoal Filter 519 311 208 Groundwater 68 68 0 Surface Water 22 22 0 Drinking Water 52 26 26 Sediment (Lake) 4 4 0 Food Products (grapes)

Vegetation 35 30 5 (broadleaf)

Milk 77 51 26 Fish 10 6 4 Total All Types 1,416 878 538

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 3.0 RADIOLOGICAL DATA

SUMMARY

TABLES This section summarizes the analytical results of the environmental samples that were collected during 2011. These results, shown in Table 3.1, are presented in a format similar

to that prescribed in the NRC's Radiological Assessment Branch Technical Position on Environmental Monitoring (Reference 1). The results are ordered by sample media type and then by radionuclide for the monitoring zones described in Section 2.3. The units for each media type are also given. Tables 3.2 and 3.3 provide information for TLD direct radiation measurements.

The left-most column of Table 3.1 contains the radionuclide of interest, the total number of analyses for that radionuclide in 2011, and the number of measurements that exceeded the Reporting Levels found in Table 2.4. The latter are classified as "Non-routine" measurements. The second column lists the required Lower Limit of Detection (LLD) for those radionuclides that have detection capability requirements specified in Table 2.3.

The absence of a value in this column indicates that no LLD is specified in the ODCM for that radionuclide in that media.

For each media type and radionuclide, the remaining three columns summarize the data for the following categories of monitoring locations: (1) the Indicator stations, which were within the range of influence of the plant and which could be affected by plant activities; (2) the station which had the highest mean concentration during 2011, and (3) the Control stations, which were beyond the influence of the plant. Direct radiation monitoring stations (using TLDs) were grouped into onsite and offsite stations. These are shown in Table 3.2.

In each of these columns, for each radionuclide, the following are given:

The mean value of all concentrations including negative values and values that were not considered "detectable".

The lowest and highest concentration.

The number of detectable measurements divided by the total number of measurements.

A sample was considered a "detectable measurement" when the concentration exceeded its associated minimum detectable concentration. The standard deviation on each measurement represents only the random uncertainty associated with the radioactive decay process (counting statistics), and not the propagation of all possible uncertainties in the analytical procedure.

The radionuclides reported in this section represent those that: (1) had an LLD requirement in Attachment 3.20 or a Reporting Level listed in Attachment 3.21 of the ODCM, (2) had a positive measurement of radioactivity, whether it was naturally-occurring or man-made, or (3) were of specific interest for any other reason. The radionuclides that were routinely analyzed and reported by GEL Laboratory in a gamma spectroscopy analysis were Ac-228, Th-228, Ag-108m, Ag-110m, Ba-140, La-140, Be-7, Ce-141, Ce-144, Co-57, Co-58, Co-60, Cr-51, Cs-134, Cs-137, Fe-59, 1-131, K-40, Mn-54, Ru-103, Ru-106, Sb-124, Sb-125, Se-75, Zn-65, Zr-95 and Nb-95.

GEL Laboratories has been analyzing the environmental samples since June 2010, when the AREVA ELAB discontinued operations. During this transitional period there were slight differences in how the labs treated the measurement data. The main differences were the

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 treatment of the Th-232 decay series, the Ba-140 decay series, and the Zr-95 decay series. Where the AREVA ELAB used one daughter nuclide to infer the decay series, GEL Labs measures each of the nuclides independently. Both analysis methods meet or exceed the reporting requirements, as detailed in the ODCM. One other important difference between the laboratories analysis methods is the determination of a statistically significant positive concentration. The AREVA ELAB has historically flagged concentrations above three times the uncertainty in the measurement, or 35. GEL Labs maintains a check on concentrations above the MDC.

Data from TLD direct radiation measurements was provided in Table 3.2. The complete listing of quarterly TLD data is provided in Table 3.3.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nucleai Plant (January - December 2011)

MEDIUM: Air Particulates (AP) UNITS: pCilcubic meter Indicator Stations Station With Highest Mean Control Stations Rad~ionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

BETA (519) 0.01 4.1E -2 ONS-3 5.3E -2 4.1E -2 (0) 1.8 - 14.6)E -2 (2.0 - 14.6)E -2 (2.0 - 9.4)E -2 (311/ 311) (52/ 52) (208/ 208)

Be-7 (40) 1.2E -1 ONS-3 1.5E -1 1.2E -1 (0) 8.3 - 20.1)E -2 (9.7 - 20.1)E -2 (9.3 - 14.3)E -2 (24/ 24) (4/ 4) (16/ 16)

K-40 (40) 8.2E -4 SBN 2.8E -3 1.3E -3

-(0) -2.2 - 4.1)E -3 (-2.0 - 6.6)E -3 (3.2 - 6.6)E -3 (0/ 24) (1/ 4) (1/ 16)

Cr-51 (40) 6.9E -4 ONS-2 4.9E -3 -4.OE -3 (0) -1.3 - 1.2)E -2 (-6.5 - 108.0)E -4 (2.5 - 1.3)E -2 (0/ 24) (0/ 4) (0/ 16)

Mn-54 (40) 0.OE 0 SBN 5.8E -5 -5.3E -5 (0) -1.3 - 1.4)E -4 (-6.0 - 30.0)E -5 (-2.1 - 3.0)E -4 (0/ 24) (0/ 4) (0/ 16)

Co-57 (40) 0.OE 0 ONS-6 2.3E -5 -1.3E -5 (0) -1.1 - 1.0)E -4 (-7.0 - 10.0)E -5 (-1.5 - 1.1)E -4 (0/ 24) (0/ 4) (0/ 16)

Co-58 (40) -4.6E -5 COL 8.8E -5 -5.7E -5 (0) -4.0 - 2.6)E -4 (-1.5 - 2.6)E -4 (-5.3 - 2.8)E -4 (0/ 24) (0/ 4) (0/ 16)

Fe-59 (40) -2.2E -5 ONS-3 1.1E -3 1.4E -4 (0) -1.1 - 1.5)E -3 (7.6 - 14.9)E -4 (-1.0 - 1.1)E -3 (0/ 24) (0/ 4) (0/ 16)

Co-60 (40) 3.7E -5 ONS-4 I6E -4 -2.6E -5 (0) -4.7 - 2.9)E -4 (6.0 - 29.0)E -5 (-3.9 - 1.6)E -4 (0/ 24) (0/ 4) (0/ 16)

Zn-65 (40) -1.9E -4 NBF 1.7E -4 -4.9E -5 (0) -7.0 - 1.8)E -4 (-1.5 - 4.7)E -4 (-6.2 - 8.9)E -4 (0/ 24) (0/ 4) (0/ 16)

Se-75 (40) 0.OE 0 NBF 7.5E -5 0.0E 0 (0) -3.7 - 2.1)E -4 (-2.1 - 3.0)E -4 (-5.5 - 4.4)E -4 (0/ 24) (0/ 4) (0/ 16)

Nb-95 (40) 1.1E -4 ONS-1 3.1E -4 2.1E -5 (0) -2.8 - 5.9)E -4 (0.0 - 5.9)E -4 (-7.5 - 3.5)E -4 (0/ 24) (0/ 4) (0/ 16)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Air Particulates (AP) UNITS: pCi/cubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected*

Zr-95 (40) 7.5E -5 NBF 3.4E -4 7.1E -5 (0) -4.7 - 7.8)E -4 -3.0 - 76.0)E -5 (-1.0 - 1.0)E -3 (0/ 24) (0/ 4) (0/ 16)

Ru -103 (40) -1.4E -4 SBN 6.3E -4 2.9E -4 (0) -1.2 - 0.5)E -3 -8.0 - 129.0)E -5 (-3.4 - 15.0)E -4 (0/ 24) (0/ 4) (0/ 16)

Ru-106 (40) 2.1E -4 ONS-3 5.6E -4 -4.2E -4 (0) -1.0 - 1.4)E -3 -2.0 - 12.7)E -4 (-3.0 - 1.1)E -3 (0/ 24) (0/ 4) (0/ 16)

Ag-108m (40) 1.3E -5 ONS-3 7.OE -5 -2.2E -5 (0) -1.2 - 1.8)E -4 -1.2 - 1.8)E -4 (-1.3 - i.0)E -4 (0/ 24) (0/ 4) (0/ 16)

Ag-110m (40) -5.5E -5 DOW 9.3E -5 -3.3E -5 (0) -3.9 - 2.1)E -4 -1.8 - 2.6)E -4 (-3.5 - 2.6)E -4 (0/ 24) (0/ 4) (0/ 16)

Sb-124 (40) 4.1E -5 SBN 3.4E -4 6.4E -5 (0) -8.4 - 14.0)E -4 -4.1 - 11.3)E -4 (-1.1 - 1.1)E -3 (0/ 24) (0/ 4) (0/ 16)

Sb-125 (40) 9.7E -5 DOW 2.4E -4 7.6E -5 (0) -4.1 - 6.5)E -4 -2.6 - 5.0)E -4 (-5.0 - 5.0)E -4 (0/ 24) (0/ 4) (0/ 16) 1-131 (40) 3.5E -2 DOW 4.8E -1 1.7E -1 (0) -1.2 - 0.9)E 0 -6.0 - 90.1)E -2 (-1.2 - 0.9)E 0 (0/ 24) (0/ 4) (0/ 16)

Cs-134 (40) 0.06 1.5E -4 DOW 3.3E -4 2.2E -4 (0). -2.1 - 6.6)E -4 8.0 - 84.0)E -5 (-1.4 - 8.4)E -4 (0/ 24) (0/ 4) (0/ 16)

Cs-137 (40) 0.06 1.6E -4 NBF 2.8E -4 2.2E -4 (0) -1.2 - 6.5)E -4 -1.5 - 6.2)E -4 (-2.5 - 7.8)E -4 (2/ 24) (1/ 4) (1/ 16)

Ba-140 (40) 6.9E -3 ONS-4 2.5E -2 O.OE 0 (0) -3.5 - 5.0)E -2 1.2 - 5.0)E -2 (-4.5 - 3.7)E -2 (0/ 24) (0/ 4) (0/ 16)

La-140 (40) 6.9E -3 ONSS4 2.5E -2 0.0E 0 (0) -3.5 - 5.0)E -2 1.2 - 5.0)E -2 (-4.5 - 3.7)E -2 (0/ 24) (0/ 4) (0/ 16)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Air Particulates (AP) UNITS: pCi/cubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses). Required Range Range Range Non-Routine* LLD No. Detected" No. Detected** No. Detected-Ce-141 (40) -3.5E -5 ONS-2 8.3E -4 -2.8E -5 (0) -1.9 - 1.8)E -3 ( 3.1 - 17.7)E -4 -1.6 - 2.4)E -3 (0/ 24) (0/ 4) (0/ 16)

Ce-144 (40) -5.0E -5 ONS-3 2.7E -4 -2.4E -5 (0) -1.4 - 1.4)E -3 -3.4 - 13.9)E -4 -6.5 - 7.1)E -4 (0/ 24) (0/ 4) (0/ 16)

Ac-228 (40) -3.9E -5 DOW 5.0E -4 1.8E -4 (0) -9.5 - 9.3)E -4 ( 1.7 - 8.6)E -4 -4.2 - 8.6)E -4 (0/ 24) (0/ 4) (0/ 16)

Th-228 (40) 8.8E -5 ONS-1 1.9E -4 7.3E -5 (0) -3.4 - 6.6)E -4 ( 8.0 - 30.0)E -5 ( -3.5 - 9.3)E -4 (0/ 24) (0/ 4) (0/ 16)

'Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM "The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Charcoal Cartridge (CF) UNITS: pCi/cubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

1-131 (519) 0.07 4.5E -3 SBN 6.4E -3 4.9E -3 (0) -1.5 - 12.4)E -2 -1.5 - 11.1)E -2 ( -1.5 - 11.1)E -2 (17/ 311) (3/ 52) (10/ 208)

Non-Routine refers to radionuclides exceeding the Reporting Levels in ODCM Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Fish (FH) UNITS: pCi/ka Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range , Range Non-Routine* LLD No. Detected** . No. Detected- No. Detected**

Be-7 (10) -6.3E 0 TRT 14 NNW 1.2E 1 2.3E -1 (0) -3.6 - 1.4)E 1 -1.3 - 1.4)E 1 (0/ 6) (0/ 1) (0/ 4)

K-40 (10) 3.2E 3 OFS-S 3.4E 3 3.3E 3 (0) 2.6 - 3.4)E 3 3.2 - 3.5)E 3 3.1 - 3.5)E 3 (6/ 6) (2/ 2) (4/ 4)

Cr-51 (10) 2.OE 1 ONS-S 3.1E 1 -1.2E 1 (0) 9.6 - 47.2)E 0 1.5 - 4.7)E 1 -3.9 - 0.8)E 1 (0/ 6) (0/ 2) (0/ 4)

Mn-54 (10) 130 -5.1E -1 OFS-N 1.6E 0 3.OE -1 (0) -2.0 - 0.5)E 0 1.5 - 1.8)E 0 -3.5 - 1.8)E 0 (0/ 6) (0/ 2) (0/ 4)

Co-57 (10) 1.0E 0 TRT 14 NNW 2.6E 0 5.3E -1 (0) -8.9 - 31.5)E -1 -1.9 - 2.2)E 0 (0/ 6) (0/ 1) (0/ 4)

Co-58 (10) 130 2.1E -1 ONS-N 2.3E 0 -2.OE 0 (0) -2.8 - 6.9)E 0 -2.3 - 6.9)E 0 -6.0 - 0.5)E 0 (0/ 6) (0/ 2) (0/ 4)

-1.7E 0 Fe-59 (10) 260 -2.3E 0 ONS-N 9.6E -1

-4.8 - 2.1)E 0 (0) -9.7 -3.1)E 0 -1.2 - 3.1)E 0 (0/ 6) (0/ 2) (0/ 4)

Co-60 (10) 130 -6.8E -1 OFS-N 1.6E 0 -5.7E -1 (0) -3.7 - 2.3)E 0 -4.5 - 36.9)E -1 ( -5.1 - 3.7)E 0 (0/ 6) (0/ 2) (0/ 4)

Zn-65 (10). 260 -5.7E 0 OFS-N -1.2E 0 -5.2E 0 (0) -7.1 - -4.6)E 0 -4.5 - 2.1)E 0 -9.8 - 2.1)E 0 (0/ 6) (0/ 2) (0/ 4)

Se-75 (10) 2.7E -1 TRT 14 NNW 3.1E 0 6.6E -1 (0) -1.9 - 3.1)E 0 -1.1 - 3.9)E 0 (0/ 6) (0/ 1) (0/ 4)

Nb-95 (10) -3.7E -2 OFS-S 1.9E 0 5.7E -1 (0) -3.2 - 2.7)E 0 1.8 - 2.0)E 0 ( -1.9 - 2.0)E 0 (0/ 6) (0/ 2) (0/ 4)

Zr-95 (10) 2.OE -1 ONS-N 1.4E 0 6.9E -1 (0) -3.6 - 2.5)E 0 5.0 - 22.3)E -1 ( -7.8 - 22.3)E -1 (0/ 6) (0/ 2) (0/ 4)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Fish (FH) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected- No. Detected- No. Detected*

Ru-103 (10) -2.0E 0 TRT 14 NNW 4.9E -1 -1.9E 0 (0) -5.5 - 1.3)E 0 -4.8 - 2.4)E 0 (0/ 6) (0/ 1) (0/ 4)

Ru-106 (10) 2.8E 0 ONS-S 1.5E 1 -6.9E 0 (0) -2.5 - 3.6)E 1 -5.8 - 35.5)E 0 -2.7 - 0.2)E 1 (0/ 6) (0/ 2) (0/ 4)

Ag-108m (10) -2.2E -1 ONS-S 8.9E -1 -3.5E -1 (0) -2.5 - 1.4)E 0 3.8 - 14.0)E -1 -1.3 - 0.6)E 0 (0/ 6) (0/ 2) (0/ 4)

Ag-110m (10) 3.0E -1 ONS-N 1.8E 0 -2.9E 0 (0) -1.6 - 3.0)E 0 6.9 - 29.7)E -1 -8.3 - 1.3)E 0 (0/ 6) (0/ 2) (0/ 4)

Sb-124 (10) -4.OE -1 ONS-S 3.1E 0 1.9E 0 (0) -3.8 - 3.9)E 0 2.2 - 3.9)E 0 -3.1 - 7.7)E 0 (0/ 6) (0/ 2) (0/ 4)

Sb-125 (10) 3.9E -1 ONS-S 3.3E 0 -1.6E 0 (0) -4.4 - 9.7)E 0 -3.0 - 9.7)E 0 -6.2 - 2.8)E 0 (0/ 2)

(0/ 6) (0/ 4) 1-131 (10) 4.OE 0 ONS-S 1.5E 1 3.1E 0 (0) -3.9 - 21.5)E 0 8.7 - 21.5)E 0 -7.4 - 72.9)E -1 (0/ 6) (0/ 2) (0/ 4)

Cs-134 (10) "130 1.8E 0 TRT 14 NNW 4.9E 0 -3.2E -1 (0) -2.7 - 5.7)E 0 1 -6.3 - 4.0)E 0 (0/ 6) (0/ 1) (0/ 4)

Cs-137 (10) 150 2.3E 1 ONS-S 3.1E 1 1.6E 1 (0) 6.6 - 36.0)E 0 2.6 - 3.6)E 1 ( 4.6 - 36.9)E 0 (5/ 6) (2/ 2) (2/ 4)

Ba-140 (10) 2.3E 0 ONS-S 5.4E 0 -2.3E -1 (0) -5.2 - 113.0)E -1 -5.2 - 113.0)E -1 -7.7 - 5.5)E 0 (0/ 6) (0/ 2) (0/ 4)

La-140 (10) 2.3E 0 ONS-S 5.4E 0 -2.3E -1 (0) -5.2 - 113.0)E -1 -5.2 - 113.0)E -1 -7.7 - 5.5)E 0 (0/ 6) (0/ 2) (0/ 4)

Ce-141 (10) 1.o0 0 ONS-S 3.4E 0 -5.1E 0 (0) -9.0 - 5.8)E 0 9.8 - 58.0)E -1 -8.9 - -0.9)E 0 (0/ 4)

(0/ 6) (0/ 2)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Fish (FH) UNITS: pCilka Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected-Ce-144 (10) -2.0E 0 OFS-S 4.OE 0 1.4E -1 (0) -1.6 - 0.4)E 1 -3.7 - 11.7)E 0 -9.0 - 11.7)E 0 (0/ 6) (0/ 2) (0/ 4)

Ac-228 (10) 2.9E 0 TRT14 NNW 9.3E 0 1.5E 0 (0) -5.1 - 18.8)E 0 -6.2 - 10.2)E 0 (0/ 6) (0/ 1) (0/ 4)

Th-228 (10) -1.0E 0 TRT 14 NNW 3. 1E 0 -3.2E 0 (0) -7.4 - 5.3)E 0 -7.6 - 1.4)E 0 (0/ 6) (0/ 1) (0/ 4)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Sediment (SE) UNITS: pCi/kg dry Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected* No. Detected**

Be-7 (4) 4.1E 2 SL-2 8.2E 2 NO DATA (0) -4.0 - 119.0)E 1 4.5 - 11.9)E 2 (1/ 4) (1/ 2)

K-40 (4) 7.6E 3 SL-3 7.6E 3 NO DATA (0) 7.5 -'7.7)E 3 7.5 - 7.7)E 3 (4/ 4) (2/ 2)

Cr-51 (4) -2.OE 1 SL-2 1.3E 2 NO DATA (0) -1.9 - 4.1)E 2 -1.6 - 4.1)E 2 (0/ 4) (0/ 2)

Mn-54 (4) -9.1E 0 SW- -3.OE 0 NO DATA (0) -1.7 - 0.3)E 1 -8.5 - 2.6)E 0 (0/ 4) (0/ 2)

Co-57 (4) 5.OE -1 SL-2 9.1E -1 NO DATA (0) -1.0 - 2.9)E 0 -1.0 - 2.9)E 0 (0/ 4) (0/ 2)

Co-58 (4) -5.3E 0 SL-2 -2.6E 0 NO DATA (0) -1.7 - 0.7)E 1 -1.2 - 0.7)E 1 (0/ 4) (0/ 2),

Fe-59 (4) 4.1E 0 SL-2 5.OE 1 NO DATA (0) -4.8 - 7.6)E 1 2.4 - 7.6)E 1 (0/ 4) (0/ 2)

Co-60 (4) 3.1E 0 SW- 9.OE 0 NO DATA (0) -1.3 - 1.6)E 1 2.1 - 15.9)E 0 (0/ 4) (0/ 2)

Zn-65 (4) -5.3E 1 SW- -1.OE 1 NO DATA (0) -1.1 - 0.3)E 2, -4.6 - 2.6)E 1 (0/ 4) (0/ 2)

Se-75 (4) 4.6E 0 SL-2 8.7E 0 NO DATA (0) -1.7 - 14.6)E 0 2.9 - 14.6)E 0 (0/ 4) (0/ 2)

Nb-95 (4) -8.OE 0 SL-3 3.5E 0 NO DATA (0) -2.9 - 1.1)E 1 -3.6 - 10.5)E 0 (0/ 4) (0/ 2)

Zr-95 (4) 2.1E 1 SL-2 2.7E 1 NO DATA (0) -3.7 - 9.0)E 1 -3.7 - 9.0)E 1 (0/ 4) (0/ 2)

-297

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Sediment (SE) UNITS: pCi/kq dry Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected*

Ru -103 (4) -9.8E 0 SL-2 -5.8E 0 NO DATA (0) -1.6 - -0.4)E 1 -7.7 - -3.9)E 0 (0/ 4) (0/ 2)

Ru-106 (4) -4.4E 1 SL-3 -3.4E 1 NO DATA (0) -1.7 - 0.7)E 2 -3.6 - -3.3)E 1 (0/ 4) (0/ 2)

Ag-108m (4) -3.OE 0 SL-2 -5.9E -1 NO DATA (0) -1.0 - 0.4)E 1 -5.3 - 4.1)E 0 (0/ 4) (0/ 2)

Ag-110m (4) -7.9E 0 SL-2 -4.3E 0 NO DATA (0) -3.4 - 2.6)E 1 -3.4 - 2.6)E 1 (0/ 4) (0/ 2)

Sb-124 (4) 3.OE 0 SL-2 1.1E 1 NO DATA (0) -3.0 - 5.1)E 1 -3.0.- 5.1)E 1 (0/ 4) (0/ 2) 8.OE 0 Sb-125 (4) SL-2 1.4E 1 NO DATA (0) -1.3 - 1.7)E 1 1.2 - 1.6)E 1 (0/ 4) (0/ 2) 1-131 (4) -3.OE 1 SL-3 1.6E 1 NO DATA (0) -8.6 - 10.4)E 1 -7.2 - 10.4)E 1 (0/ 4) (0/ 2)

Cs-134 (4) 150 I.1E 1 SL-2 1.4E 1 NO DATA (0) 4.2 - 14.0)E 0 1.4 - 1.4)E 1 (0/ 4) (0/ 2)

Cs-137 (4) 180 1.2E 1 SL-2 1.8E 1 NO DATA (0) -9.5 - 46.4)E 0 -9.5 - 46.4)E 0 (0/ 4) (0/ 2)

Ba-140 (4) -1.8E 1 SL-2 2.4E 1 NO DATA (0) -8.6 - 8.7)E 1 (0/ 4)

-4.0 - 8.7)E 1

.(0/ 2)

La-140 (4) -1.8E 1 SL-2 2.4E 1 NO DATA (0) -8.6 - 8.7)E 1 -4.0 - 8.7)E 1 (0/ 4) (0/ 2)

Ce-141 (4) -2.3E 0 SL-2 1.4E 1 NO DATA (0) -2.9 - 3.7)E 1 -8.4 - 37.0)E 0 (0/ 4) (0/ 2)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Sediment (SE) UNITS: pCi/kcq dry Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected- No. Detected*-

Ce-144 (4) 3.1E 1 SL-2 5.5E 1 NO DATA (0) -2.1 - 10.4)E 1 ( 6.4 - 104.0)E 0 (0/ 4) (0/ 2)

Ac-228 (4) 2.0E 2 5L-2 2.1E 2 NO DATA 1 (0) ( 1.2 - 3.0)E 2 ( 1.2 - 3.0)E 2 (1/ 4) (0/ 2)

Th-228 (4) 1.5E 2 SL-3 1.5E 2 NO DATA (0) 8.0 - 21.4)E 1 1.5 - 1.6)E 2 (2/ 4) (2/ 2)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Steam Generator Facility Water (SG) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

BETA (16) 1.5E 1 SG-5 3.9E 1 NO DATA (0) 1.2 - 44.4)E 0 2.9 - 4.4)E 1 (12/ 16) (4/ 4)

H-3. (16) 2000 5.OE 1 SG-2 1.4E 2 NO DATA (0) -1.4 - 2.6)E 2 -3.1 - 25.7)E 1 (0/ 16) (0/ 4)

Be-7 (16) 2.4E 0 SG-2 4.1E 0 NO DATA (0) -6.7 - 17.9)E 0 -5.7 - 10.0)E 0 (0/ 16) (0/ 4)

K-40 (16) 2.4E 1 58-5 4.OE 1 NO DATA (0) -7.8 - 74.4)E 0 1.7 - 7.4)E 1 (3/ 16) (2/ 4)

Cr-51 (16) 2.8E 0 5G-1 4.5E 0 NO DATA (0) -3.9 - 13.0)E 0 -3.9 - 9.9)E 0 (0/ 16) (0/ 4)

Mn-54 (16) 15 -2.3E -1 SG-1 3.8E -1 NO DATA (0) -2.1 - 2.1)E 0 -7.5 - 21.0)E -1 (0/ 16) (0/ 4)

Co-57 (16) -6.4E -2 SG-5 5.7E -1 NO DATA (0) -2.3 - 1.0)E 0 ( 3.0 - 9.8)E -1 (0/ 16) (0/ 4)

Co-58 (16) 15 -5.1E -1 SG-2 -3.5E -1 NO DATA (0) -1.6 - 0.6)E 0 -1.2 - 0.4)E 0 (0/ 16)

(0/ 4)

Fe-59 (16) 30 -4.9E -2 SG-2 1.1E 0 NO DATA (0) -2.6 - 2.3)E 0 -9.6 - 18.6)E -1 (0/ 16) (0/ 4)

Co-60 (16) 15 3..OE -1 SG-4 8.2E -1 NO DATA (0) -1.8 - 1.6)E 0 ( 2.4 - 15.9)E -1 (0/ 16) (0/ 4)

Zn-65 (16) 30 -7.5E -1 58-1 1.7E -1 NO DATA (0) -5.1 - 5.8)E 0 -5.1 - 5.8)E 0 (0/ 16) (0/ 4)

Se-75 (16) -1.5E -1 58-1 7.5E -2 NO DATA (0) -2.0 - 1.0)E 0 -6.9 - 4.7)E -1 (0/ 16) (0/ 4)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Steam Generator Facility Water (SG) UNITS:- pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected- No. Detected**

Nb-95 (16) 15 6.OE -1 SG-2 7.8E -1 NO DATA (0) -5.0 - 18.4)E -1 3.0 - 171.0)E -2 (0/ 16) (0/ 4)

Zr-95 (16) 30 -2.3E -1 56-1 4.4E -1 NO DATA (0) -2.0 - 2.1)E 0 -2.0 - 2.1)E 0 (0/ 16) (0/ 4)

Ru-103 (16) -8.9E -1 SG-5 -5.4E -1 NO DATA (0) -3.3 - 0.5)E 0 -1.3 - 0.5)E 0 (0/ 16) (0/ 4)

Ru-106 (16) 1.9E -1 SG-2 3.4E 0 NO DATA (0) -1.4 - 1.2)E 1 -2.3 - 12.1)E 0' (0/ 16) (0/ 4)

Ag-108m (16) 2.OE -1 SG-2 7.3E -1 NO DATA (0) -9.0 - 17.3)E -1 ( 2.0 - 17.3)E -1 (0/ 16) (0/ 4)

Ag-110m (16) -5.6E -1 56-1 1.0E -1 NO DATA (0) -9.2 - 0.8)E 0 -5.2 - 7.6)E -1 (0/ 16) (0/ 4)

Sb-124 (16) -8.OE -1 SG-5 2.1E -1 NO DATA (0) -5.6 - 2.0)E 0 -4.6 - 5.2)E -1 (0/ 16) (0/ 4)

Sb-125 (16) -1.5E 0 SG-5 -6.9E -1 NO DATA (0) -5.0 - 0.8)E 0 -2.3 - 0.7)E 0 (0/ 16) (0/ 4) 1-131 (16) 1 -4.3E -1 .SG-4 5.6E -2 NO DATA (0) -6.9 - 1.7)E 0 -8.5 - 10.7)E -1 (0/ 16) (0/ 4)

Cs-134 (16) 15 1.9E -1 SG-2 6.6E -1 NO DATA (0) -2.7 - 1.3)E 0 ( 1.7 - 12.7)E -1 (0/ 16) (0/ 4)

Cs-137 (16) 18 -2.8E -1 SG-2 2.6E -1 NO DATA (0) -2.6 - 0.8)E 0 -3.2 - 8.2)E -1 (0/ 16) (0/ 4)

Ba-140 (16) 60 -7.9E -1 SG-2 7.7E -2 NO DATA (0) -5.5 - 1.7)E 0 -1.7 - 1.7)E 0 (0/ 16) (0/ 4)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Steam Generator Facility Water (SG) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

La-140 (16) 15 -7.9E -1 SG-2 7.7E -2 NO DATA (0) -5.5 - 1.7)E 0 -1.7 - 1.7)E 0 (0/ 16) (0/ 4)

Ce-141 (16) 2.1E -1 SG-5 1.1E 0 NO DATA (0) -2.3 - 4.2)E 0 -7.9 - 32.6)E -1 (oi 16) (0/ 4)

Ce-144 (16) 1.8E 0 SG-2 4.4E 0 NO DATA (0) 1 -7.9 - 10.5)E 0 -2.9 - 10.5)E 0 (0/ 16) (0/ 4)

Ac-228 (16) -9.7E -2 SG-2 3.9E 0 NO DATA (0) -8.1 - 11.2)E 0 -5.8 - 11.2)E 0 (0/ 16) (0/ 4)

Th-228 (16) 1.1E 0 SG-5 1.8E 0 NO DATA (0) 1 -4.6 - 6.3)E 0 -1.1 - 4.0)E 0 (0/ 16) (0/ 4)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

,

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Food Products (TF) UNITS: pCi/kq wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected* No. Detected-Be-7 (2) 1.3E 2 OFS-G 1.5E 2 1.5E 2 (0)

(1/ 1) (1/ (U/

K-40 (2) 4.9E 3 ONS-G 4.9E 3 4.4E 3 (0)

(U/ 1)

(1/ (U/

Cr-51 (2) -1.2E 0 OFS-G 1.6E 1 1.6E 1 (0)

(0/ 1) (0/ (0/

Mn-54 (2) -7.7E -1 ONS-G -7.7E -1 -1.2E 0 (0)

(0/ 1) (0/ (0/

Co-57 (2) 5.1E -1 ONS-G 5.1E -1 1.5E -1 (0)

(0/ 1) (0/ (0/

Co-58 (2) 1.7E 0 ONS-G 1.7E 0 6.2E -1 (0)

(0/ 1) (0/ (0/

Fe-59 (2) 1.3E 0 ONS-G 1.3E 0 -2.5E 0 (0)

(0/ 1) (0/ (0/

Co-60 (2) 2.4E 0 ONS-G 2.4E 0 -3.9E -1 (0)

(0/ 1) (0/ (0/

Zn-65 (2) -9.5E 0 OFS-G 4.2E 0 4.2E 0 (0)

(0/ 1) (0/ (0/

Se-75 (2) -6.3E -1 OFS-G 3.9E -2 3.9E -2 (0) 1).

(0/ (0/ (0/

Nb-95 (2) 5.3E -1 ONS-G 5.3E -1 -1.0E -1 (0)

(0/ 1) (0/ (0/

Zr-95 (2) 1.0E 0 ONS-G 1.OE 0 -2.3E 0 (0)

(0/ 1) (0/ (0/

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Food Products (TF) UNITS: pCi/kq wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

Ru -103 (2) 8.1E -1 ONS-G 8.1E -1 -5.0E 0 (0)

(0/ (0/ (0/

Ru-106 (2) 1.3E I ONS-G 1.3E 1 -3.1E 1 (0)

(0/ (0/ (0/

Ag-108m (2) -7.1E -2 ONS-G -7.1E -2 -2.7E 0 (0)

(0/ (0/ (0/

Ag-110m (2) -3.7E 0 ONS-G -3.7E 0 -4.9E 0 (0)

(0/ (0/ (0/

Sb-124 (2) 1.1E -1 OFS-G 5.7E 0 5.7E 0 (0)

(0/ (0/ (0/

Sb-125 (2) -3.6E 0 OFS-G 5.7E 0 5.7E 0 (0)

(0/ (0/ (0/

1-131 (2) 60 -1.6E 0 OFS-G 2.5E 0 2.5E 0 (0)

(0/ (0/ (0/

Cs-134 (2) 60 1.5E 0 0NS-G 1.5E 0 -2.5E 0 (0)

(0/ (0/ (0/

Cs-1 37 (2) 60 2.3E 0 ONS-G 2.3E 0 1.5E -1 (0)

(0/ (0/ (0/

Ba-140 (2) -6.4E -1 OFS-G 5.9E -1 5.9E -1 (0)

(0/ (0/ (0/

La-140 (2) -6.4E -1 OFS-G 5.9E -1 5.9E -1 (0)

(0/ (0/ (0/

Ce-141 (2) -7.OE -1 OFS-G 1.3E 0 1.3E 0 (0)

(0/ (0/ (0/

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Food Products (TF) UNITS: pCil/k wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

Ce-144 (2) -1.6E 1 0FS-G -1.6E 0 -1.6E 0 (0)

(0/ 1) (0/ 1) (0/ 1)

Ac-228 -(2) 1.OE 1 ONS-G 1.OE I 2.9E 0 (0)

(0/ 1) (0/ 1) (0/ 1)

Th-228 (2) 4.OE 0 ONS-G 4.OE 0 2.2E -1 (0)

(0/ 1) (0/ 1) (0/ 1)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Milk (TM) UNITS: pCilliter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected*

Be-7 (77) -1.8E -1 1.1E -1 -7.2E -1 (0) -1.7 - 1.8)E 1 -1.7 - 1.1)E 1 -1.3 - 1.5)E 1 (0/ 51) (0/ 25) (0/ 26)

K-40 (77) 1.6E 3 1.8E 3 1.4E 3 (0) 1.3 - 2.2)E 3 1.3 - 2.2)E 3 ( 1.4 - 1.5)E 3 (51/ 51) (25/ 25) (26/ 26)

Cr-51 (77) 3.8E -1 1.6E 0 -1.3E 0 (0) -1.6 - 1.5)E 1 -1.5 - 1.5)E 1 -1.5 - 1.8)E 1 (0/ 51) (0/ 25) (0/ 26)

Mn-54 (77) -2.5E -2 2.7E -2 -4.7E -1 (0) -2.0 - 2.4)E 0 -2.0 - 2.1)E 0 -2.3 - 1.2)E 0 (0/ 51) (0/ 25) (0/ 26)

Co-57 (77) 1.OE -1 2.9E -1 2.9E -1 (0) -1.8 - 1.2)E 0 -5.3 - 15.7)E -1 -5.3 - 15.7)E -1 (0/ 51) (0/ 26) (0/ 26)

Co-58 (77) -1.2E -1 -3.7E -2 -4.5E -2 (0) -1.7 - 2.8)E 0 -1.6 - 2.8)E 0 -1.9 - 1.6)E 0 (0/ 51) (0/ 25) (0/ 26)

Fe-59 (77) 1.6E -1 2.4E -1 2.4E -1 (0) -4.6 - 3.6)E 0 -4.4 - 4.5)E 0 -4.4 - 4.5)E 0 (0/ 51) (0/ 26) (0/ 26)

Co-60 (77) 1.5E -1 4.2E -1 3.3E -1 (0) " -2.9 - 2.8)E 0 -2.9 - 2.8)E 0 -1.5 - 2.8)E 0 (0/ 51) (0/ 26) (0/ 26)

Zn-65 (77) -1.2E 0 -8.OE -1 -1.SE 0 (0) -5.9 - 6.4)E 0 -4.8 - 3.7)E 0 -6.3 - 4.7)E 0 (0/ 51) (0/ 25) (0/ 26)

Se-75 (77) 1.7E -1 3.9E -1 -2.6E -1 (0) -1.9 - 2.7)E 0 -1.9 - 2.7)E 0 -1.8 - 1.2)E 0 (0/ 51) (0/ 25) (0/ 26)

Nb-95 (77) 3.6E -1 5.5E -1 2.8E -1 (0) -2.1 - 2.3)E 0 -7.7 - 22.5)E -1 -1.4 - 1.6)E 0 (0/ 51) (0/ 26) (0/ 26)

Zr-95 (77) -7.3E -2 3.5E -1 -1.OE -2 (0) -2.5 - 2.5)E 0 -2.5 - 2.5)E 0 ( -2.7 - 1.9)E 0 (0/ 51) (0/ 25-) (0/ 26)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Milk (TM) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected*

Ru-103 (77) -8.6E -1 MR -6.6E -1 -7.2E -1.

(0) -2.9 - 1.1)E 0 -2.9 - 1.1)E 0 -2.7 - 0.9)E 0 (0/ 51) (0/ 25) (0/ 26)

Ru -106 (77) -3.9E -2 MR 1.6E 0 -1.8E 0 (0) -1.2 - 1.9)E 1 -1.1 - 1.9)E I -2.0 - 0.9)E 1 (0/ 51) (0/ 25) (0/ 26)

Ag-10Sm (77) -9.6E -2 SF -3.6E -2 -1.3E -1 (0) -1.5 - 1.8)E 0 -1.5 - 1.8)E 0 -1.5 - 1.1)E 0 (0/ 51) (0/ 26) (0/ 26)

Ag-110m (77) -6.9E -1 MR -5.5E -1 -9.3E -1 (0) -2.7 - 1.1)E 0 -1.9 - 1.0)E 0 -8.8 - 0.2)E 0

.(0/ 51) (0/ 25) (0/ 26)

Sb-124 (77) -2.2E -1 SF -3.9E -2 -4.1E -1 (0) -4.3 - 2.4)E 0 -3.1 - 2.3)E 0 -3.0 - 3.1)E 0

.(0/ 51) (0/ 26) (0/ 26)

Sb-125 (77) -1.8E -1 MR -5.7E -2 -4.9E -1 (0) -4.6 - 3.1)E 0 -4.6 - 3.1)E 0 -4.7 - 7.0)E 0 (0/ 51) (0/ 25) (0/ 26) 1-131 (77) 9.7E -2 MR 1.7E -1 6.3E -2 (0) -4.8 - 14.8)E -1 -2.7 - 14.8)E -1 -2.4 - 8.9)E -1 (2/ 51) (2/ 25) (0/ 26)

Cs-1 34 (77) 15 2.5E -1 SF 4.7E -1 9.OE -2 (0) -1.6 - 2.2)E 0 -1.0 - 2.2)E 0 -1.5 - 2.1)E 0 (0/ 51) (0/ 26) (0/ 26)

Cs-137 (77) 18 8.1E -1 MR 1.4E 0 3.3E -1 (0) -2.4 - 5.3)E 0 -1.3 - 5.3)E 0 -4.2 - 2.7)E 0 (1/ 51) (1/ 25) (0/ 26)

Ba-140 (77) 60 -2.OE -1 SF -1.9E -1 -2.5E -1 (0) -2.7 - 3.3)E 0 -2.7 - 3.3)E 0 -2.4 - 1.9)E 0 (0/ 51) (0/ 26) (0/ 26)

La-140 (77) 15 -2.OE -1 SF -1.9E -1 -2.5E -1 (0) -2.7 - 3.3)E 0 -2.7 - 3.3)E 0 -2.4 - 1.9)E 0 (0/ 51) (0/ 26) (0/ 26)

Ce-141 (77) -1.1E -1 LF 6.1E -1 6.1E -1 (0) -5.2 - 3.4)E 0 -2.9 - 6.1)E 0 -2.9 - 6.1)E 0 (0/ 51) (0/ 26) (0/ 26)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Milk (TM) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

Ce-144 (77) -l.0E 0 MR 1.1E -1 -5.2E -1 (0) ( -1.8 - 1.0)E 1 -9.5 - 7.6)E 0 -7.9 - 10.9)E 0 (0/ 51) (0/ 25) (0/ 26)

Ac-228 (77) 1.2E 0 MR 2.5E 0 8.6E -1 (0) ( -1.1 - 1.2)E 1 -1.1 - 1.2)E 1 -7.6 - 9.7)E 0 (0/ 51) (0/ 25) (0/ 26)

Th-228 (77) -4.2E -2 SF. 8.1E -1 5.8E -1 (0) ( -5.2 - 4.4)E 0 -4.0 - 4.3)E 0 ( -2.6 - 7.2)E 0 (0/ 51) (0/ 26) (0/ 26)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Vegetation (TV) UNITS: pCi/kq wet Indicator Stations Station With Highest Mean Control Stations

-..-.--.-.-.-.----.-.--.-.----.-.--.-.-------.-.---------.-----------------

Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected- No. Detected**

Be-7 (35) 1.8E 3 OFS-V 1.9E 3 1.9E 3 (0) 4.7 - 47.7)E 2 8.0 - 32.3)E 2 ( 8.0 - 32.3)E 2 (30/ 30) (5/ 5) (5/ 5)

K-40 (35) 2.8E 3 OFS-V 3.4E 3 3.4E 3 (0) 1.1 - 5.0)E 3 1.5 - 4.6)E 3 ( 1.5 - 4.6)E 3 (29/ 30) (5/ 5) (5/ 5)

Cr-51 (35) -8.5E 0 ONS3-V -1.2E 0 -2.5E 1 (0) -7.7 - 5.2)E 1 -7.7 - 5.2)E 1 -4.8 - 0.2)E 1 (0/ 30) (0/ 15) (0/ 5)

Mn-54 (35) -2.2E -1 OFS-V 2.8E 0 2.8E 0 (0) -1.6 - 1.5)E 1 -1.2 - 60.5)E -. L -1.2 - 60.5)E -1 (0/ 30) (0/ 5) (0/ 5)

Co-57 (35) 9.4E -2 OFS-V 3.0E 0 3.OE 0 (0) -5.9 - 10.3)E 0 6.4 - 79.3)E -: 1. 6.4 - 79.3)E -1 (0/ 30) (0/ 5) (0/ 5)

Co-58 (35) -3.1E -1 ONS3-V 1.1E 0 -2.9E 0 (0) -1.1 - 1.0)E 1 -4.1 - 9.6)E 0 -6.7 - -0.3)E 0 (0/ 30) (0/ 15) (0/ 5)

Fe-59 (35) -5.3E -1 ONS1-V 1.8E -1 -5.3E -1 (0) -2.4 - 2.0)E 1 -1.3 - 2.0)E 1' -6.4 - 4.0)E 0 (0/ 30) (0/ 15) (0/ 5)

Co-60 (35) 2.5E -1 ON51-V 1.8E 0 -1.5E -1 (0) -1.6 - 1.2)E 1 -3.5 - 11.9)E 0 -4.8 - 3.0)E 0 (0/ 30) (0/ 15) (0/ 5)

Zn-65 (35) -5.0E 0 OFS-V -3.5E 0 -3.5E 0 (0) -3.3 - 2.1)E 1 -1.4 - 0.4)E 1 -1.4 - 0.4)E 1 (0/ 30) (0/ 5) (0/ 5)

Se-75 (35) -3.9E -1 ONSI-V 9.6E -1 4.0E -1 (0) -1.1 - 0.6)E 1 -4.1 - 5.5)E 0 -2.0 - 4.9)E 0 (0/ 30) (0/ 15) (0/ 5)

Nb-95 (35) 1.7E 0 ONSI-V 2.7E 0 -1.2E 0 (0) -1.3 - 1.2)E 1 -7.7 - 12.0)E 0 ( -3.6 - 3.7)E 0 (0/ 30) (0/ 15) (0/ 5)

Zr-95 (35) -1.9E 0 ONS3-V -6.8E -1 -1.3E 0 (0) -1.2 - 1.3)E 1 -1.0 - 1.3)E 1 ( -1.3 - 1.0)E 1 (0/ 30) (0/ 15) (0/ 5)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Vegetation (TV) ' UNITS: pCi/kq wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected*

Ru-103 (35) -2.OE 0 OFS-V 2.1E 0 2.1E 0 (0) -9.1 - 5.4)E 0 -5.8 - 67.4)E -1 ( -5.8 - 67.4)E -1 (0/ 30) (0/ 5) (0/ 5)

Ru-106 (35) -7.6E 0 ONS3-V -3.2E 0 -1.3E 1 (0) -1.1 - 0.7)E 2 -3.8 - 6.9)E 1 -4.0 - 0.7)E 1 (0/ 30) (0/ 15) (0/ 5)

Ag-108m (35) -4.98 -1 ONS3-V 1.7E -2 -1.6E 0 (0) -7.0 - 3.4)E 0 -7.0 - 3.3)E 0 -5.7 - 2.2)E 0 (0/ 30) (0/ 15) (0/ 5)

Ag-110m (35) -4.OE 0 OFS-V -1.0E 0 -1.0E 0 (0) -5.2 - 0.3)E 1 -1.6 - 0.1)E 0 -1.6 - 0.1)E 0 (0/ 30) (0/ 5) (0/ 5)

Sb-124 (35) -5.8E -1 OFS-V 1.3E -1 1.3E -1 (0) -1.5 - 1.6)E 1 -6.0 - 7.8)E 0 -6.0 - 7.8)E 0 (0/ 30) (0/ 5) (0/ 5)

Sb-125 (35) -7.3E -1 ONSI-V 7.5E -1 -5.8E 0 (0) -2.9 - 1.6)E 1 -2.9 - 1.3)E 1 -1.3 - 0.5)E 1 (0/ 30) (0/ 15) (0/ 5) 1-131 (35) 60 2.0E 0 ONS3-V 2.8E 0 -3.9E 0 (0) -1.1 - 1.3)E 1 -5.4 - 13.3)E 0 -1.1 - 0.3)E 1 (0/ 30) (0/ 15) (0/ 5)

Cs-134 (35) 60 7.9E -1 OFS-V 2.4E 0 2.4E 0 (0) (-9.9 - 9.7)E 0 -4.0 - 6.2)E 0 -4.0 - 6.2)E 0 (0/ 30) (0/ 5) (0/ 5)

Cs-137 (35) 60 1.5E 1 ONS3.V 2.4E 1 4.5E 0 (0) -8.5 - 156.0)E -5.5 - 156.0)E 0 -2.2 - 10.5)E 0 (5/ 30) (4/ 15) (0/ 5)

Ba-140 (35) -2.7E 0 ONS3-V -2.1E 0 -2.4E 0 (0) -2.2 - 1.2)E 1 -1.2 - 0.7)E 1 -6.0 - 3.3)E 0 (0/ 30) (0/ 15) (0/. 5)

La-140 (35) -2.7E 0 ONS3.V -2.1E 0 -2.4E 0 (0) -2.2 - 1.2)E 1 -1.2 - 0.7)E 1 -6.0 - 3.3)E 0 (0/ 30) (0/ 15) (0/ 5)

Ce-141 (35) -7.2E -1 ONS1-V -5.8E -2 -1.3E 0 (0) -2.6 - 1.3)E 1 -1.1 - 0.9)E 1 ( -1.4 - 0.6)E 1 (0/ 30) (0/ 15) (0/ 5)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Vegetation (TV) UNITS: pCi/ka wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected- No. Detected** No. Detected**

Ce-144 (35) -7.3E 0 OFS-V 1.6E -2 1.6E -2 (0) -8.0 - 3.4)E 1 ( -2.3 - 2.1)E 1 -2.3 - 2.1)E 1 (0/ 30) (0/ 5) (0/ 5)

Ac-228 (35) 1.5E 1 ONS3-V 3.3E 1 1.3E 1 (0) -5.4 - 17.8)E 1 ( -2.8 - 17.8)E 1 1 -1.4 - 4.0)E 1 (2/ 30) (2/ 15) (0/ 5)

Th-228 (35) 1.1E -1 OFS-V 3.4E 0 3.4E 0 (0) -3.1 - 1.4)E 1 ( -1.6 - 10.9)E 0 ( -1.6 - 10.9)E 0 (0/ 30) (0/ 5) (0/ 5)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Drinking Water (WD) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected-BETA (52) 4 2.4E 0 LTW 2.4E 0 1.8E 0 (0) -6.9 - 62.6)E -1 -6.9 - 62.6)E -1 -3.7 - 41.2)E -1 (8/ 26) (8/ 26) (3/ 26)

H-3 (8) 2000 1.8E 2 LTw 1.8E 2 1.5E 2 (0) -3.3 - 39.6)E 1 -3.3 - 39.6)E 1 -1.8 - 5.3)E 2 (0/ 4) (0/ 4) (0/ 4)

Be-7 (52) 2.OE -1 LTw 2.OE -1 -7.5E -2 (0) ( -1.2 - 2.1)E 1 -1.2 - 2.1)E 1 -1.7 - 1.5)E 1 (0/ 26) (0/ 26) (0/ .26)

K-40 (52) -1.6E -1 STJ 4.6E 0 4.6E 0 (0) -3.1 - 4.0)E 1 -3.3 - 6.1)E 1 ( -3.3 - 6.1)E 1 (1/ 26) (0/ 26) (0/ 26)

Cr-51 (52) 3.9E -1 LTw 3.9E -1 -2.6E 0 (0) -1.4 - 1.3)E 1 -1.4 - 1.3)E 1 -2.4 - 0.8)E 1 (0/ 26) (0/ 26) (0/ 26)

Mn-54 (52) 15 -3.1E -2 STJ 5.0E -2 5.OE -2 (0) -2.4 - 0.7)E 0 -1.0 - 1.1)E 0 -1.0 - 1.1)E 0 (0/ 26) . (0/ 26) (0/ 26)

Co-57 (52) 1.4E -1 STJ 1.9E -1 1.9E -1 (0) -9.4 - 11.2)E -1 -5.4 - 17.5)E -1 -5.4 - 17.5)E -1 (0/ 26) (0/ 26) (0/ 26)

,Co-58 (52) 15 -2.3E -1 STJ 6.6E -2 6.6E -2 (0) -2.0 - 1.2)E 0 -1.0 - 0.9)E 0 -1.0 - 0.9)E 0 (0/ 26) (0/ 26) (0/ 26)

Fe-59 (52) 30 3.8E -1 LTW 3.8E -1 1.4E -1 (0) -1.9 - 4.9)E 0 -1.9 - 4.9)E 0 -1.8 - 2.8)E 0 (0/ 26) (0/ 26) (0/ 26)

Co-60 (52) 15 -7.4E -2 STJ 3.9E -2 3.9E -2 (0) -1.8 - 0.9)E 0 -1.5 - 1.3)E 0 -1.5 - 1.3)E 0 (0/ 26) (0/ 26) (0/ 26)

Zn-65 (52) 30 -1.6E 0 LTw -1.6E 0 -1.7E 0 (0) -5.9 - 2.2)E 0 -5.9 - 2.2)E 0 ( -5.6 - 1.2)E 0 (0/ 26) (0/ 26) (0/ 26)

Se-75 (52) -5.5E -2 LTW -5.5E -2 -1.2E -1 (0) -1.3 - 2.6)E 0 -1.3 - 2.6)E 0 ( -2.1 - 1.7)E 0 (0/ 26) (0/ 26) (0/ 26)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant

. (January -December 2011)

MEDIUM: Drinking Water (WD) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

Nb-95 (52) 15 4.1E -1 STJ 5.8E -1 5.8E -1 (0) -1.3 - 2.0)E 0 -6.7 - 20.7)E -1 -6.7 - 20.7)E -1 (0/ 26) (0/ 26) (0/ 26)

Zr-95 (52) 30 1.1E -1 LTW 1.1E -1 -2.2E -2 (0) -2.5 - 4.0)E 0 -2.5 - 4.0)E 0 -2.1 - 3.5)E 0 (0/ 26) (0/ 26) (0/ 26)

Ru-103 (52) -5.OE -1 STJ -5.0E -1 -5.0E -1 (0) -2.1 - 0.9)E 0 -2.5 - 1.1)E 0 -2.5 - 1.1)E 0 (0/ 26) (0/ 26) (0/ 26)

Ru-106 (52) -4.5E -1 STJ 4.6E -1 4.6E -1 (0) -1.3 - 1.0)E 1 -9.6 - 12.4)E 0 -9.6 - 12.4)E 0 (0/ 26) (0/ 26) (0/ 26)

Ag-108m (52) -9.3E -2 STJ -2.9E -3 -2.9E -3 (0) -1.4 - 1.0)E 0 -2.3 - 1.5)E 0 -2.3 - 1.5)E 0 (0/ 26) (0/ 26) (0/ 26)

Ag-110m (52) -9.5E -1 STJ -8.7E -1 -8.7E -1 (0) -7.5 - 0.9)E 0 -7.2 - 0.5)E 0 -7.2 - 0.5)E 0 (0/ 26) (0/ 26) (0/ 26)

Sb-124 (52) -3.3E -1 LTW -3.3E -1 -6.7E -1 (0) -5.7 - 2.1)E 0 -5.7 - 2.1)E 0 -3.9 - 2.4)E 0 (0/ 26) (0/ 26) (0/ 26)

Sb-125 (52) -2.OE -2 LTW -2.OE -2 -8.8E -2 (0) -2.8 - 3.5)E 0 -2.8 - 3.5)E 0 -2.7 - 3.5)E 0 (0/ 26) (0/ 26) (0/ 26) 1-131 (52) 2.6E -1 LTW 2.6E -1 6.9E -2 (0) -3.6 - 25.6)E -1 -3.6 - 25.6)E -1 -2.9 - 11.5)E -1 (0/ 26) (0/ 26) (0/ 26)

Cs-134 (52) 15 1.9E -1 STJ 7.5E -1 7.5E -1 (0) -2.5 - 1.4)E 0 -1.3 - 17.3)E -1 -1.3 - 17.3)E -1 (0/ 26) (0/ 26) (0/ 26)

Cs-137 (52) 18 -8.8E -2 STJ -3.9E -2 -3.9E -2 (0) -5.1 - 1.7)E 0 -2.0 - 1.7)E 0 -2.0 - 1.7)E 0 (0/ 26) (0/ 26) (0/ 26)

Ba-140 (52) 60 -2.0E -1 LTW -2.0E -1 -5.2E -1 (0) -4.0 - 2.9)E 0 -4.0 - 2.9)E 0 ( -5.7 - 2.7)E 0 (0/ 26) (0/ 26) (0/ 26)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Drinking Water (WD) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected-La-140 (52) 15 -2.8E -1 LTW -2.8E -1 -4.6E -1 (0) -4.0 - 2.9)E 0 -4.0 - 2.9)E 0 -5.7 - 2.7)E 0 (0/ 26) (0/ 26) (0/ 26)

Ce-141 (52) -1.3E -1 STJ -1.8E -2 -1.8E -2 (0) -3.8 - 1.7)E 0 -4.7 - 3.7)E 0 -4.7 - 3.7)E 0 (0/ 26) (0/ 26) (0/ 26)

Ce-144 (52) 2.8E -1 STJ 1.1E 0 1.1E 0 (0) -1.2 - 1.1)E 1 -1.1 - 1.5)E 1 -1.1 - 1.5)E 1 (0/ 26) (0/ 26) (0/ 26)

Ac-228 (52) -1.3E -1 LTW -1.3E -1 -5.2E -1 (0) -9.2 - 9.1)E 0 -9.2 - 9.1)E 0 -8.7 - 9.5)E 0 (0/ 26) (0/ 26) (0/ 26)

Th-228 (52) 5.OE -1 LTW 5.0E -1 2.8E -1 (0) -4.2 - 5.1)E 0 -4.2 - 5.1)E 0 ( -4.8 - 6.7)E 0 (0/ 26) (0/ 26) (0/ 26)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Ground Water (WG) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected-H-3 (68) 22000 2.1E 2 W-4 9.2E 2 NO DATA (0) -3.4 - 11.1)E 2 6.3 - 11.1)E 2 (10/ 68) (4/ 4)

Be-7 (68) 5.5E -1 W-1 4.5E 0 NO DATA (0) -1.1 - 1.4)E 1 -6.6 - 85.0)E -1 (0/ 68) (0/ 4)

K-40 (68) 1.9E 1 W-9 9.7E 1 NO DATA (0) -3.1 - 13.6)E 1 6.2 - 13.6)E 1 (15/ 68) (4/ 4)

Cr-51 (68) -8.4E -1 W-1 3 4.7E 0 NO DATA (0) -2.0 - 1.4)E 1 -3.0 - 11.1)E 0 (0/ 68) (0/ 4)

Mn-54 (68) 15 -1.2E -1 W-9 5.9E -1 NO DATA (0) -1.8 - 2.4)E 0 -4.2 - 11.3)E -1 (0/ 68) (0/ 4)

Co-57 (68) -2.4E -2 W-2 2.9E -1 NO DATA (0) -1.7 - 1.4)E 0 6.2 - 39.2)E -2 (0/ 68) (0/ 4)

Co-58 (68) 15 -3.IE -1 W-9 3.1E -1 NO DATA (0) -2.7 - 1.9)E 0 -4.6 - 17.3)E -1 (0/ 68) (0/ 4)

Fe-59 (68) 30 3.2E -1 W-4 2.2E 0 NO DATA (0) -3.3 - 5.1)E 0 -2.5 - 35.4)E -1 (0/ 68) (0/ 4)

Co-60 (68) 15 1.4E -1 W-3 1.2E 0 NO DATA (0) -2.0 - 2.0)E 0 2.9 - 20.1)E -1 (0/ 68) (0/ 4)

Zn-65 (68) 30 -1.4E 0 W-8 1.8E -1 NO DATA (0) -6.9 - 2.7)E 0 -1.7 - 2.7)E 0 (0/ 68) (0/ 4)

Se-75 (68) 8.4E -3 W-3 7.7E -1 NO DATA (0) L-1.9 - 3.0)E 0 -2.1 - 14.7)E -1 (0/ 68) (0/ 4)

Nb-95 (68) 15 5.1E -1 W-5 9.1E -1 NO DATA (0) -1.2 - 2.0)E 0 ( 3.1 - 164.0)E -2 (0/ 68) (0/ 4)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Ground Water (WG) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected- No. Detected** No. Detected-Zr-95 (68) 30 7.3E -2 W-10 1.1E 0 NO DATA (0) -3.0 - 3.1)E 0 -1.6 - 22.9)E -1 (0/ 68) (0/ 4)

Ru-103 (68) -6.8E -1 W-4 6.OE -1 NO DATA (0) -2.8 - 3.8)E 0 -1.2 - 3.8)E 0 (0/ 68) (0/ 4)

Ru-106 (68) -4.9E -1 W-3 3.4E 0 NO DATA (0) -1.2 - 1.2)E 1 -1.0 - 7.5)E 0 (0/ 68) (0/ 4)

Ag-1O8m (68) -9.9E -2 W-5 3.1E -1 NO DATA (0) -1.4 - 1.1)E 0 '-3.7 - 9.5)E -1 (0/ 68) (0/ 4)

Ag-11m (68) -7.2E -1 W-6 6.9E -2 NO DATA (0) -8.0 - 1.4)E 0 -4.6 - 8.1)E -1 (0/ 68) (0/ 4)

Sb-124 (68) -4.1E -1 W-14 1.4E 0 NO DATA (0) -4.2 - 3.7)E 0 -4.9 - 36.5)E -1 (0/ 68) (0/ 4)

Sb-125 (68) 1.7E -1 W-10 1.5E 0 NO DATA (0) -5.3 - 5.4)E 0 -1.1 - 5390.0)E -3 (0/ 68) (0/ 4) 1-131 (68) 1 -1.3E -1 W-4 3.9E 0 NO DATA (0) -4.2 - 16.0)E 0 -8.2 - 160.0)E -1 (0/ 68) (0/ 4)

Cs-134 (68) 15 2.4E -1 W-5 6.9E -1 NO DATA (0) -1.7 - 2.5)E 0 -1.2 - 12.4)E -1 (0/ 68) (0/ 4)

Cs-137 (68) 18 -5.1E -2 W-12 1.1E 0 NO DATA (0) -2.5 - 1.8)E 0 7.4 - 16.9)E -1 (0/ 68) (0/ 4)

Ba-140 (68) 60 -7.6E -2 W-15 1.8E 0 NO DATA (0) -6.2 - 7.8)E 0 6.1 - 37.5)E -1 (0/ 68) (0/ 4)

La-140 (68) 15 -7.6E -2 W-15 1.8E 0 NO DATA (0) -6.2 - 7.8)E 0 6.1 - 37.5)E -1 (0/ 68) (0/ 4)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January -December 2011)

MEDIUM: Ground Water (WG) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected* No. Detected** No. Detected**

Ce-141 (68) -7.1E -2 W.1lI 2.2E 0 NO DATA (0) -7.5 - 3.9)E 0 ( 1.9 - 2.5)E 0 (0/ 68) (0/ 4)

Ce-144 (68) -2.7E -1 W-12 2.OE 0 NO DATA (0) -8.8 - 7.8)E 0 -1.6 - 40.2)E -1 (0/ 68) (0/ 4)

Ac-228 (68) 2.0E -1 W-1 6.9E 0 NO DATA (0) -1.1 - 1.2)E 1 1 -7.5 - 1160.0)E -2 (0/ 68) (0/ 4)

Th-228 (68) 7.3E -1 W-4 2.5E 0 NO DATA (0) -6.2 - 10.7)E 0 7.0 - 37.9)E -1 (0/ 68) (0/ 4)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM

- The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Surface Water (WS) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected* No. Detected** No. Detected**

H-3 (8) 22000 1.7E 2 SWL-2 2.3E 2 NO DATA (0) -1.2.- 3.9)E 2 9.7 - 38.8)E 1 (0/ 8) (0/ 4)

Be-7 (22) 2.7E 0 SWL-2 3.1E 0 NO DATA

'(0) -7.5 - 19.0)E 0 -6.7 - 19.0)E 0 (0/ 11)

(0/ 22)

K-40 (22) 6.2E 0 SWL-3 1.3E 1 NO DATA (0) -3.0 - 8.4)E 1 -1.0 - 8.4)E 1 (0/ 22) (0/ 11)

Cr-51 (22) 2.4E -1 SWL-3 7.2E -1 NO DATA (0) -1.0 - 1.3)E 1 -5.6 - 6.1)E 0 (0/ 22) (0/ 11)

Mn-54 (22) 15 -1.8E -1 SWL-3 -7.8E -2 NO DATA (0) -1.6 - 0.6)E 0 -1.2.- 0.6)E 0 (0/ 22) (0/ 11)

Co-57 (22) -4.5E -2 SWL-3 8.9E -2 NO DATA (0) -2.1 - 1.3)E 0 -7.0 - 13.0)E -1 (0/ 22) (0/ 11)

Co-58 (22) 15 -7.1E -2 SWL-3 2.7E -1 NO DATA (0) -2.7 - 1.6)E 0 -4.7 - 15.9)E -1 (0/ 22) (0/ 11)

Fe-59 (22) 30 -2.OE -2 SWL-3 2.2E -1 NO DATA (0) -3.3 - 2.4)E 0 -3.2 - 2.4)E 0 (0/ 22) (0/ 11)

Co-60 (22) 15 2.6E -1 SWL-2 4.9E -1 NO DATA (0) -6.4 - 21.3)E -1 -4.8 - 21.3)E -1 (0/ 22) (0/ 11)

Zn-65 (22) 30 -6.9E -1 SWL-2 -4.4E -1 NO DATA (0) -3.9 - 3.9)E 0 -2.7 - 3.9)E 0 (0/ 22) (0/ 11)

Se-75 (22) -1.6E -1 SWL-2 -7.4E -2 NO DATA (0) -1.4 - 1.5)E 0 -1.3 - 1.5)E 0 (0/ 22) (0/ 11)

Nb-95 (22) 15 2.7E -1 SWL-2 6.5E -1 NO DATA (0) -1.6 - 1.6)E 0 -5.7 - 164.0)E -2 (0/ 22) (0/ 11)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Surface Water (WS) UNITS: pCilliter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

Zr-95 (22) 30 -3.9E -1 SWL-2 4.2E -3 NO DATA (0) -3.5 - 1.6)E 0 -2.0 - 1.4)E 0 (0/ 22) (0/ 11)

Ru-103 (22) -7.OE -1 SWL-2 -5.5E -1 NO DATA (0) -2.7 - 1.8)E 0 -2.2 - 1.8)E 0 (0/ 22) (0/ 11)

Ru-106 (22) -2.3E 0 SWL-2 -2.OE 0 NO DATA (0) -1.0 - 0.4)E 1 -1.0 - 0.4)E 1 (0/ 22) (0/ 11)

Ag-108m (22) 8.OE -2 SWL-3 1.2E -1 NO DATA (0) -1.1 - 1.2)E 0 -1.1 - 0.9)E 0 (0/ 22) (0/ 11)

Ag-110m (22) -5.9E -1 SWL-3 -4.8E -1 NO DATA (0) -4.6 - 1.0)E 0 -3.4 - 0.8)E 0 (0/ 22) (0/ 11)

Sb-124 (22) -7.3E -1 SWL-2 -5.1E -1 NO DATA (0) -7.1 - 4.0)E 0 -3.5 - 4.0)E 0 (0/ 22) (0/ 11)

Sb-125 (22) 3.OE -1 SWL-2 7.6E -1 NO DATA (0) -3.7 - 2.2)E 0 -1.7 - 2.2)E 0 (0/ 22) (0/ 11) 1-131 (22) 8.3E -1 SWL-3 2.3E 0 NO DATA (0) -5.4 - 6.9)E 0 -1.8 - 6.9)E 0 (0/ 22) (0/ 11)

Cs-It34 (22) 15 7.2E -1 SWL-3 8.5E -1 NO DATA (0) -1.3 - 2.5)E 0 -1.3 - 2.5)E 0 (0/ 22) (0/ 11)

Cs-137 (22) 18 4.9E -1 SWL-2 6.6E -1 NO DATA (0) -1.4 - 4.7)E 0 -1.4 - 4.7)E 0 (0/ 22) (0/ 11)

Ba-140 (22) 60 -2.8E -1 SWL-3 1.8E -1 NO DATA (0) -5.8 - 5.8)E 0 -4.3 - 5.8)E 0 (0/ 22) (0/ 11)

La-140 (22) 15 -2.8E -1 SWL-3 1.8E -1 NO DATA (0) -5.8 - 5.8)E 0 -4.3 - 5.8)E 0 (0/ 22) (0/ 11)

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.1 Radiological Environmental Program Summary Indiana Michigan Power Co., DC Cook Nuclear Plant (January - December 2011)

MEDIUM: Surface Water (WS) UNITS: pCllliter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range Non-Routine* LLD No. Detected** No. Detected** No. Detected**

Ce-141 (22) 1.4E 0 SWL-3 2.0E 0 NO DATA (0) -5.6 - 11.1)E 0 -1.1 - 11.1)E 0 (0/ 22) (0/ 11)

Ce-144 (22) -2.2E 0 SWL-2 -1.9E 0 NO DATA (0) -1.9 - 0.7)E 1 -1.9 - 0.6)E 1 (0/ 22) (0/ 11)

Ac-228 (22) 1.6E 0 SWL-3 2.9E 0 NO DATA (0) -8.3 - 46.6)E 0 -8.3 - 46.6)E 0 (0/ 22) . (0/ 11)

Th-228 (22) 1.6E 0 SWL-3 1.7E 0 NO DATA (0) -5.8 - 8.4)E 0 ( -5.8 - 8.4)E 0 (0/ 22) (0/ 11)

Non-Routine refers to radionuclides exceeding the Reporting Levels in Attachment 3.21 of the ODCM The fraction of sample analysis yielding detectable measurements (i.e., > MDC) is shown in parenthesis.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.2 2011 Environmental TLD Exposure Rate Measurements (pR/hr)

Onsite TLDs Offsite TLDs Highest Mean (SBN)

Mean 5.1 +/- 0.4 5.7 +/- 0.7 7.3 +/- 0.4 Range 4.2 - 6.1 4.6 - 7.8 6.8 - 7.8 No. of Measurements* 48 60 4 Each measurement was based on quarterly readings from three TLD elements.

Units are pR (micro-roentgen) per hour.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 3.3 2011 ENVIRONMENTAL TLD DATA

SUMMARY

Exposure Rate (pR/hr+/- I std. dev.)

Average Annual Station First Second Third Fourth Exposure Rate Number Quarter Quarter Quarter Quarter (IpRlhr)

T-01 5.1 +/- 0.2 5.4 +/- 0.4 5.2 +/- 0.2 5.3 +/- 0.2 5.3 T-02 5.2 +/- 0.2 5.2 +/- 0.4 4.9 +/- 0.4 5.3 +/- 0.3 5.2 T-03 4.6 +/- 0.3 4.7 +/- 0.3 4.2 +/- 0.3 4.5 +/- 0.2 4.5 T-04 5.4 +/- 0.2 6.0 +/- 0.3 5.5 +/- 0.3 6.1 +/- 0.3 5.8 T-05 5.1 +/- 0.3 5.1 +/- 0.2 4.9 +/- 0.2 5.3 +/- 0.3 5.1 T-06 4.9 +/- 0.3 5.0 +/- 0.3 4.8 +/- 0.3 5.4 +/- 0.2 5.0 T-07 5.0 +/- 0.5 5.0 +/- 0.3 5.0 +/- 0.3 5.5 +/- 0.6 5.1 T-08 5.3 +/- 0.6 5.4 +/- 0.3 4.9 +/- 0.3 5.7 +/- 0.2 5.3 T-09 4.8 +/- 0.2 4.9 +/- 0.2 4.5 +/- 0.2 5.1 +/- 0.2 4.8 T-10 5.2+/-0.2 5.1 +/-0.2 5.0+/-0.3 5.4+/-0.4 5.2 T-11 5.1 +/-0.3 5.1 +/-0.2 4.9+/-0.3 5.4 +/-0.3 5.1 T-12 5.1 +/-0.2 5.3 +/-0.3 4.7+/-0.2 5.4 +/-0.4 5.1 NBF 5.7 +/- 0.3 5.6 +/- 0.4 5.3 +/- 0.3 5.5 +/- 0.3 5.5 SBN 6.8 +/- 0.4 7.3 +/- 0.3 7.2 +/- 0.3 7.8 +/- 0.4 7.3 DOW 4.9 +/- 0.3 5.2 +/- 0.3 4.7 +/- 0.4 5.3 +/- 0.2 5.0 COL 4.7+/-0.2 4.8 +/-0.2 4.6+/-0.3 5.1 +/-0.2 4.8 OFT-1 4.8 +/- 0.2 5.2 +/- 0.2 4.9 +/- 0.2 5.2 +/- 0.3 5.0 OFT-2 5.3 +/- 0.4 5.3 +/- 0.3 5.2 +/- 0.3 5.5 +/- 0.3 5.3 OFT-3 5.1 +/-0.2 5.6 +/-0.3 5.1 +/-0.3 5.9 +/-0.4 5.4 OFT-4 5.3 +/- 0.4 5.6 +/- 0.3 5.4 +/- 0.2 5.9 +/- 0.3 5.6 OFT-5 5.3 +/- 0.4 5.4 +/- 0.2 5.2 +/- 0.4 5.6 +/- 0.2 5.4 OFT-6 6.5 +/- 0.3 6.7 +/- 0.2 6.4 +/- 0.3 7.2 +/- 0.4 6.7 OFT-7 5.2 +/- 0.3 5.3 +/- 0.2 4.9 +/- 0.3 5.8 +/- 0.7 5.3 OFT-8 6.1 +/- 0.2 6.2 +/- 0.3 6.1 +/- 0.4 6.4 +/- 0.3 6.2 OFT-9 5.6 +/- 0.4 5.7 +/- 0.4 6.3 +/- 0.3 5.9 +/- 0.3 5.9 OFT-10 5.4 +/- 0.3 5.5 +/- 0.2 5.2 +/- 0.3 5.6 +/- 0.3 5.4 OFT-11 6.0 +/- 0.3 6.6 +/- 0.4 6.3 +/- 0.3 6.5 +/- 0.3 6.4

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 4.0 ANALYSIS OF ENVIRONMENTAL RESULTS 4.1 Sampling Program Deviations The Off-Site Dose Calculation Manual (ODCM) states in Section 3.5 that the environmental sampling and analysis program shall be conducted as specified in Attachment 3.19 at the locations specified in the same attachment. Deviations are permitted from the required sampling schedule if specimens are unobtainable due to hazardous conditions, seasonal unavailability or malfunction of automatic sampling equipment. If specimens are unobtainable due to sampling equipment malfunction, every effort shall be made to complete corrective action prior to the end of the next sampling period.

All deviations from the sampling schedule shall be documented in the Annual Radiological Environmental Operating Report pursuant to Section 3.5.2 of the ODCM. The following deviations were noted for the 2011 sampling program:

1. 1/3/11 to 3/3/11, 7/1/11, 9/30/11, 10/20/11: Due to personnel safety/seasonal unavailability issues (extremely harsh weather conditions and/or ice buildup along the shoreline) routine sampling of Lake Michigan Surface Water at SWL-2 and SWL-3 was not performed. Data sheet 1, Documentation of Unavailable Samples, of 12-THP-6010-RPP-630 was written to document this event. Actions to prevent recurrence of this issue are not practical at this time.

2. 1/1/11 to 12/31/11: The required number of indicator milk samples (minimum of three) was not collected due to the retirement of Glen Troy Farm's operator and failure to locate a suitable replacement farm.

This occurrence was documented using data sheet 1 (Documentation of Unavailable Samples) to 12-THP-6010-RPP-630 and in plant Condition Report 04351048.

Environmental Section personnel implemented OSD-001 required broadleaf sampling (monthly when available) per 12-THP-6010-RPP-638 "Collection of Grape and Broadleaf Samples" on 10/19/05.

The REMP Coordinator determined:

a. Milk sampling would remain in effect at the three remaining locations (2 Indicator, 1 Control) in anticipation that an additional indicator farm or other suitable sampling regimen would be identified.

b. Actions to prevent recurrence of this issue are not practical at this time.

3. 1/1/11 to 3/31/11 and 10/1/11 to 12/31/11: Due to the seasonal unavailability of suitable vegetation, "Broadleaf In Lieu Of Milk" vegetation samples were not collected during these two periods. No actions to prevent recurrence of this issue were identified at this time.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011

4. On January 5, 2011, REMP personnel verified operability on the 9 air stations with operable telemetry units. Telemetry was verified to be satisfactory and operable. ONS-5 telemetry repair was still in progress in January. Telemetry was tested again on February 9 and March 9, 2011. All ten stations' telemetry units operated as expected.

5. On February 2, 2011, inclement weather (heavy snow and unsafe travel conditions) made weekly air filter collection impossible. Collection was moved to the next day, February 3, 2011.

6. On February 16, 2011, samples from the Monroe farm were not available due to the animals giving birth at the time. This occurrence was documented using data sheet 1 (Documentation of Unavailable Samples) to 12-THP-6010-RPP-630.

7. Off-site laboratory personnel dropped and subsequently destroyed 2 out of 3 of the milk samples collected on 3-30-11. Replacement samples were shipped the following week on 4-6-11. This was documented in GEL's corrective action process, CARR 110413-572.

8. On May 5, 2011 REMP personnel supplied supplemental power to the ONS-2 air station after notification of a 69KV power supply outage that would interrupt power supply to the station. Only a few minutes of sampling time were lost due to this switching of power supply. When power was removed, the telemetry system did not register a notification of power loss. Subsequent follow up and investigation found a setting that was in need of update. Further tests were acceptable.

9. On June 15,2011, it was discovered that the air sampler at station ONS-5 had not been turned on after its filter change the previous week. Equipment was verified to be operable. Normal sampling re-commenced. AWAY #2011-7158-2 was written to document this human performance event.

10. On 8-10-11 and 8-17-11, the ONS-1 Automatic Volume Totalizer (AVT) controller was found to be not working. Unit was replaced both times. These pieces of equipment (AVTs) are being replaced as specified under A/R 2011-4673-2.

11. On 8-29-11, it was noted that power supply had been interrupted to the ONS-5 sample station. Benton Harbor Transmission people were contacted and power was restored. Power outage was attributed to a tree limb that fell on the supply line. Although sample was still able to be used, about 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months of run time were lacking.

12. On 9-21-11, the ONS-6 AVT controller was found to not be working correctly (low sample flowrate). Flowrate was successfully adjusted to a proper rate. These pieces of equipment (AVTs) are being replaced as specified under A/R 2011-4673-2.

13. On 10-5-11, power was found to be off at air station ONS-5. Benton Harbor Transmission people were once again contacted and power was restored.

Power outage was attributed to another tree limb that fell on the supply line.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Although sample was still able to be used, only about 40 hours4.62963e-4 days 0.0111 hours 6.613757e-5 weeks 1.522e-5 months of run time were recorded. A/R 2011-11566 written.

14. On 11-30-11 air samples (LSN 291277) were collected after an 8 day run. This was a planned evolution as the previous week's samples were collected a day early (11-22-11, LSN 290961) to allow shipping to offsite lab prior to the Thanksgiving Holiday.

15. On October 5, 2011 power was found off at ONS-5. A downed power cable was noted and was most likely from a strong storm that swept through the area on September 30, 2011. Power was restored same day. Sensus Telemetry did not function as designed. Unit was reset for further observation. AWAY 2011-11566 initiated.

16. On October 19, 2011 power was again found off at ONS-5. Outage was most likely from strong storms sweeping through area on October 17, 2011. Power was restored the next day on October 20, 2011. Sensus Telemetry again did not function as designed. Unit was removed from service and sent for repair. AWAY 2011-12227 initiated.

17. The Monroe Farm milk sample taken on 12-21-11 (lab sample ID 292714) initially indicated 5.27 pCi/L of Cs-1 37. This value was greater than the measured MDC of 2.70 pCi/L. Since this was not typical, the REMP Coordinator requested a confirmatory count be performed with a different portion of the sample. This was done as lab sample ID 295004. The result of this additional count was 1.8 pCi/L, which was below the measured MDC of 3.77 pCi/L. Therefore, it was concluded that the sample did not contain Cs-1 37 levels above the lab's MDC.

18. A new revision to RPP-636, "Collection of Fish Samples" recommends a yearly perch sample to be taken. This revision was incorporated during the 3 rd quarter of 2011. Environmental personnel attempted three times to obtain perch samples (August 22, August 30 and September 20, 2011) in the 3 rd quarter, however, in each instance the crews were unable to successfully launch the Environmental boat due to mechanical breakdowns of the boat's launching mechanism (beach launcher). The crew tried an additional time in the 4 th quarter (10-13-11) to obtain perch samples; however, they were unable to catch any fish.

Weather conditions for the rest of the 4th quarter did not allow any other attempts at sample collection. The collection of perch samples is not required by the ODCM, however, their absence was documented via data sheet 1.

4.2 Comparison of Achieved LLD with Requirements Attachment 3.20 from the ODCM (Table 2.3 in this report) lists the required Lower Limits of Detection (LLDs) for routine environmental sample analyses. As discussed in Section 3.5.2 Bases of the ODCM, on occasion, an LLD may not be achieved due to situations such as a low sample volume. In such a case, the ODCM requires the identification and discussion of the contributing factors in the Annual Radiological Environmental Operating Report. These factors are summarized below.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 For each analysis having an LLD requirement, the a posteriorior "after the fact" LLD calculated for that analysis was compared with the required LLD. Appendix D includes flags in the far right hand margin for any occurrences of exceeded MDC's (note that the terms LLD and Minimum Detectable Concentration (MDC) are used interchangeably in this assessment).

During 2011, there were 8 cases where the MDC exceeded the LLD requirement, at 5 different sampling locations. The off site laboratory initiated CARR 120313-668 to track correction of these issues. The CARR addresses this issue by instituting changes to the processing and measurement of samples that have an LLD requirement for short lived isotopes.

Milk samples collected on May 11 from Shuler Farm (#278137024) [See Appendix D] did not meet LLD requirements. GEL laboratories generated a Data Exception Report (#959759) to document the occurrence. Because of the short half-life and the length of time between sample receipt and analysis it was not possible to meet the 1 pCi/I criteria. The measured MDC was found to be 1.2 pCi/I.

Milk samples collected on June 22, 2011 from Livingston Farm (#280647025)

[See Appendix D] did not meet LLD requirements. GEL Laboratories generated a Data Exception Report (#976890) to document the occurrence. Because of the short half-life and the length of time between sample receipt and analysis it was not possible to meet the 1 pCi/I criteria. The measured MDC was found to be 1.1 pCi/I.

Milk samples collected on July 6, 2011 from Shuler Farm (#281623024) [See Appendix D] did not meet LLD requirements. GEL laboratories generated a Data Exception Report (#979448) to document the occurrence. Because of the short half-life and the length of time between sample receipt and analysis it was not possible to meet the 1 pCi/I criteria. The measured MDC was found to be 1.14 pCi/I.

Drinking water samples collected on July 13, 2011 from St. Joseph

(#282125024) [See Appendix D] did not meet 1-131 LLD requirements. GEL laboratories generated a Data Exception Report (#978588) to document the occurrence. Because of the short half-life and the length of time between sample receipt and analysis it was not possible to meet the 1 pCi/I criteria. The measured MDC was found to be 1.04 pCi/l.

Drinking water samples collected on August 24, 2011 from St. Joseph

(#284846024) [See Appendix D] and Lake Township (#284846026) [Appendix D]

did not meet 1-131 LLD requirements. GEL laboratories generated a Data Exception Report (#1000299) to document the occurrence. Because of the short half-life and the length of time between sample receipt and analysis it was not possible to meet the 1 pCi/I criteria. The measured MDC was found to be 2.12 and 4.84 pCi/I respectively.

Drinking water samples collected on September 7, 2011 from Lake Township

(#285555026) [See Appendix D] did not meet 1-131 LLD requirements. GEL laboratories generated a Data Exception Report (#1005488) to document the occurrence. Because of the short half-life and the length of time between sample

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 receipt and analysis it was not possible to meet the I pCi/I criteria. The measured MDC was found to be 3.68 pCi/I.

Milk samples collected on December 7, 2011 from Monroe Farm (#271748023)

[See Appendix D] did not meet LLD requirements. GEL laboratories generated a Data Exception Report (#1032910) to document the occurrence. Because of the short half-life and the length of time between sample receipt and analysis it was not possible to meet the 1 pCi/I criteria. The measured MDC was found to be 1.29 pCi/I.

4.3 Results Compared Against Reporting Levels ODCM Section 3.5.2 requires a discussion in the Annual Radiological Environmental Operating Report of any instance that a radionuclide concentration exceeds the reporting levels given in Attachment 3.21 (Table 2.4 in this report). Reporting Levels are the environmental concentrations that relate to the ALARA design dose objectives of 10 CFR 50, Appendix I. It should be noted that environmental concentrations are averaged over calendar quarters for the purposes of this comparison, and that Reporting Levels apply only to measured levels of radioactivity due to plant effluents. During 2011, no Reporting Levels were exceeded.

4.4 Data Analysis by Media Type - Discussion The 2011 REMP data for each media type are discussed below. Graphical plots of monitoring data are also shown in Figures 4.1 to 4.6. With respect to data plots, all results were plotted, whether they were "detectable" or "non-detectable."

4.4.1 Air Particulate Air particulates were collected weekly on 47 mm particulate filters at six indicator locations and four control locations, and analyzed for gross beta radioactivity. On a quarterly basis, a gamma isotopic analysis was performed on the composite of each location's weekly particulate sample media.

Figure 4.1 shows the gross beta concentrations in air particulate filters collected for the operating period from 1989 through 2011. Gross beta concentrations were detectable on all particulate samples, both indicator and control locations.

There was a discernible increase in the counts at all stations since the middle of 2010, as shown in Figure 4.1. When an average AREVA ELab response, on a monthly basis is compared to the average GEL response, there is an average increase of approximately 40%. It should be noted that this increase was found in both control samples as well as indicators, and followed the historical trending over the course of the year. This relative increase is attributed to differences in analytical method between the AREVA ELab (historical data before the second half of 2010) and GEL laboratories, (since the second half of 2010). The reason for the step increase is related to the change in the gross beta counting equipment configurations and reference calibration standards used by the AREVA

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 lab and GEL. Both labs use(d) gas proportional counting of the filter element. However, AREVA applied a Cs-1 37 calibration source while the GEL lab uses a Tc-99 calibration source. In the case of the AREVA data record, the Cs-137 detection efficiency (approximately 34%) was applied to the "gross" counts to determine the apparent activity. This inherently presumes that the radioactivity in a field sample is all Cs-137. In the case of the GEL data record, the Tc-99 efficiency (21%), is applied to the same "gross" counts as if all the radioactivity in this case is Tc-99. The end result is two different gross beta radioactivity determinations for the same level of environmental activity. In application, this is not an adverse condition in that the gross beta counting is used as a qualitative indicator of changes. in environmental conditions, not as a quantitative measure of the actual radioactivity: Since the comparison of the response curves for each monitoring station, including the control station, are similar over time, the curves indicate that there is no detectable influence from a single nearby point source such as the Cook Nuclear Plant.

Notable in the graph is a distinct annual cycle. The gross beta concentration fluctuations over the year were attributed to seasonal changes in the naturally-occurring airborne radioactivity levels. This conclusion was based on the similarity in fluctuations noted in gross beta concentrations at both the indicator stations and control stations.

As a result of the change in average gross beta response in the air particulates, it is difficult to see any evidence of the airborne contamination attributed to the Fukushima accidents when comparing to historical averages for the appropriate time period.

Results for gamma isotopic analyses performed on quarterly composites of the weekly particulate samples have been listed in Table 3.1. The presence of naturally-occurring Be-7 was detected in all of the indicator and control samples. One sample contained naturally-occurring K-40, at a control location.

It was also found that three samples, two indicator and one control, contained Cs-1 37 at levels above the calculated MDC, but well below the required LLD of 0.06 pCi/m 3 [See Table 3.1]. Cs-137 has not historically been common for this sample media. Plant release data was reviewed to determine if the pathway was plant related, but no evidence of a release was found. It was determined that based on the time of detection and the lack of a plant or historical non-plant source, the most likely origin for this activity was from the Fukushima accident. CNP Action Request #2011-4952 was generated to document this occurrence.

Full details of all measurements can be found in Appendix D.

In summary, the information detailed above was evaluated and found to be consistent with data obtained during the conduct of CNP's "Pre-Operational Radiological Monitoring Program" (PRMP) [see Appendix E] or attributed to the Fukushima accident. Also, no significant difference was noted between the average monthly gross beta

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 concentration at the indicator and the control stations. Therefore, the results were not due to plant operations.

Figure 4.1 AVERAGE MONTHLY GROSS BETA INAIR PARTICULATES 70 60 50 240 10 0

0 .. . . . . . 4 .. . . , .4 . .

4.4.2 Airborne Iodine Airborne iodine sample media were collected weekly in conjunction with the air particulate sample media replacement. These media were analyzed for Iodine-131.

Iodine was detected above the MDC at 27 stations, 17 indicator and 10 control [See Table 3.1]. The concentration and time frame (i.e., the samples were collected between March 23 and April 6) were consistent with fission products released during the accident at Fukushima Daiichi.

This conclusion was confirmed by comparing the results of other plants across the country and by reviewing the plant releases. The 1-131 concentrations were determined to not be a result of operations at the Cook Plant, and were documented in CNP Action Request 2011-4952-1.

Full details of all measurements can be found in Appendix D.

The information detailed above was evaluated and found to be consistent with data obtained during the conduct of CNP's PRMP, with the exception

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 of the time period impacted by releases by the plants at Fukushima Daiichi.

4.4.3 Groundwater (Well)

Groundwater samples were collected from seventeen well locations on a quarterly frequency and analyzed for gamma isotopic and tritium [See Table 3.1].

The presence of naturally-occurring K-40 was identified in fifteen samples out of sixty-eight collected [See Table 3.1]. The presence of K-40 in groundwater samples is attributed to natural occurrences since it is not a fission or activation product related to plant operations.

Tritium was detected above the associated MDC in ten groundwater samples, although in all cases, they were below the required LLD. These occurrences are detailed in Table 4.1 [Data from Appendix D]. The low level activity in all of these samples were in areas identified to have recapture via precipitation of gaseous releases through licensed, radioactive, gaseous release points or from the Turbine Room Sump, a licensed release pathway. Tritium activity in these wells is being tracked by the CNP groundwater protection initiative (GPI). Figures 4.2, 4.3 and 4.4 plot the tritium levels (both "detectable" and "non-detectable") for groundwater.

Table 4.1 Tritium Concentrations Measured Above MDC Location Concentration (pCi!l) Reference Date W-14 651 2/1/2011 W-4 1110 2/7/2011 W-5 964 2/7/2011 W-15 507 2/7/2011 W-4 633 5/6/2011 W-5 1110 5/6/2011 W-6 733 5/6/2011 W-4 957 8/3/2011 W-5 771 8/3/2011 W-4 975 11/3/2011 While the low level tritium activity listed above is believed to be from plant operations, it is well below action levels and has no significant impact on public health and safety.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 4.2 TRITIUM IN GROUNDWATER 4000 3500 3000-I2500 3DOOO 1500 1000 50o o

s.-WeI1 W91-2 --*- Wd-

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 4.3 TRITIUM IN GROUNDWATER 1000 80OO M00 30M 1000 0

14- W"I- -*-Wd- -.*--We" - WE-w*N-

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 4.4 Tritium in Groundwater 26MO 15000 I100W1 Is=0

-Wd$ -u.Wed -db-We*10 WeNl -*W-WdW -- WeN13 --- WeN14 -MWZO -MW21

40) "1.- "1--- ,

4.4.4 Drinking Water Drinking water samples were collected daily from one indicator and one control station. A 14-day composite was analyzed for gamma isotopic and gross beta radioactivity. A quarterly composite was analyzed for tritium.

A specific Iodine-131 low-level analysis performed on all samples indicated that no lodine-131 was present.

Figure 4.5 shows a plot of the tritium data since 1989. Starting in 2002, all data was plotted, whether the results were negative or positive as described in Section 4.4. No tritium was detected in drinking water samples in 2011 [See Table 3.1].

During 2011, the presence of gross beta radioactivity was identified in eight indicator and three control samples, with activity levels somewhat less than those observed in recent years. One indicator sample

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 contained naturally-occurring K-40 at levels above the MDC [See Table 3.1 and Appendix D].

No other gamma-emitting nuclides were identified in any 2011 samples.

While drinking water sampling was not performed as part of CNP's PRMP, the information detailed above was evaluated and found to be consistent with data obtained during the plant's operational history.

This information, coupled with the identification of detectable levels of gross beta activity in both the indicator and control samples, supported the conclusion that these occurrences were not attributable to plant operations.

Figure 4.5 Tritium in Drinking Water

-o-n------

- JSo e - I I -

4.4.5 Surface Water Surface water samples were collected daily from two locations. Monthly composites were analyzed for gamma-emitting radionuclides and quarterly composites were analyzed for tritium. No gamma-emitting

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 nuclides were detected in any of the samples collected in 2011. No tritium was detected in any of the samples collected in 2011 [See Table 3.1].

The information detailed above was evaluated and found to be consistent with data obtained during past operational periods. There has been no impact to this sample medium from plant operations.

4.4.6 Sediment Semiannual samples of lake sediments were collected from two indicator stations and analyzed for gamma-emitting nuclides. During 2011, naturally-occurring K-40 was detected in all sediment samples. One indicator station showed the presence of naturally-occurring Be-7. Two indicator samples detected Th-228 and one indicator sample detected Ac-228. These nuclides are expected as part of the naturally-occurring thorium decay series. No other gamma-emitting nuclides were detected in any of the samples collected in 2011. Unlike many past operational and pre-operational periods where traces of Cs-1 37 were found, no detectable Cs-1 37 was identified in 2011 samples [See Table 3.1].

The information detailed above was evaluated and found to be consistent with data obtained during the conduct of CNP's PRMP and the presence of naturally-occurring nuclides (K-40, Be-7, Ac-228 and Th-228) was not attributed to plant operation.

4.4.7 Milk Milk samples were collected bi-weekly from two indicator and one control station during 2011.

Results of all sample analyses identified the presence of naturally-occurring K-40, ranging in concentration from 1270 to 2220 pCi/liter [See Appendix D], which falls into a similar range as found in previous years. Cs-137 was detected in one indicator sample at a concentration of 2.6 pCi/I [See Appendix D], which is much lower than the required LLD of 18 pCi/I. The likely origin of this activity is from the release at Fukushima as a result of the accident there. This conclusion was confirmed by verifying the records of plant related releases and in consultation with other plants in the country through the Nuclear Energy Institute (NEI). Cs-137 was observed during the CNP's PRMP, but due to the evidence of airborne contamination from an offsite source and a lack of evidence of a plant release it was not attributed to plant operations.

This occurrence was evaluated and documented in A/R 2011-4952-1.

Iodine-131 specific low level detection analyses detected 1-131 in two indicator milk samples [See Table 3.1], just above the LLD limit of 1 pCi/I.

Given the short half-life and the time frame for observations these activities are believed to be part of the airborne releases from the Fukushima accident. This was confirmed with a verification of plant records of releases and in consultation with other plants in the country through NEI. It was concluded that the detected 1-131 was not the result

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 of CNP effluents. This occurrence was evaluated and documented in A/R 2011-4952-1.

The information detailed above, when not under the influence of the airborne contamination resulting from the Fukushima accident, was evaluated and found to be consistent with data obtained during the conduct of CNP's PRMP. The presence of naturally-occurring K-40 was not attributed to plant operation.

4.4.8 Food Products & Vegetation Vegetation samples (broad-leaf) analyzed for gamma-emitting nuclides identified the presence of naturally-occurring Be-7 in all samples from both indicator and control locations. Naturally-occurring K-40 was identified in 29 of 30 indicator stations and all of the control stations. Ac-228, another naturally-occurring nuclide was detected in two indicator samples. Five indicator samples detected Cs-137 above the MDC within the range of 13-156 pCi/kg [See Table 3.1]. Although the presence of Cs-137 is consistent with historical data, pre-operational samplings of broadleaf samples were not collected before D.C. Cook Plant construction. Although the presence of Cs-137 in five samples could have been the result of the airborne contamination from the Fukushima accident, the historical results for this media indicate it could be the result of atmospheric weapons testing. A record of the samples was entered into the Cook Plant corrective action program; the number of this report is 2011-4952-1. The evaluation of 2011-4952-1 concluded that the Cs-137 result was not due to plant effluents. No other gamma-emitting nuclides were detected in any of the samples.

Two annual samples of food products (grapes) were analyzed for gamma-emitting radionuclides. Analysis identified only the presence of naturally-occurring Be-7 and K-40 [See Table 3.1]. While food product sampling was not performed as part of CNP's PRMP, the information detailed above was evaluated and found to be consistent with data obtained during the plant's operational history. The presence of the detected radionuclides was not attributed to plant operations.

4.4.9 Fish Fish samples were collected on two occasions at two indicator and two control locations. Perch, salmon and trout sampling started in the third quarter of 2011; however perch samples were not successfully collected.

Naturally-occurring K-40 was detected in all the samples. Trace levels of Cs-1 37 was observed in five of the six indicator samples as well as two of the four control samples [See Table 3.1]. The concentrations ranged from 14.5-36.9 pCi/kg [See Table 3.1], all of which are well below the required LLD of 150 pCi/kg. The presence of Cs-1 37 is consistent with historical and pre-operational data, although it is recognized that it is also possible that the origin of the Cs-1 37 activity could have been the Fukushima accident. The evaluation of CNP A/R 2011-4952-1 concluded that the Cs-137 result was not due to plant effluents.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 The information detailed above was evaluated and found to be consistent with data obtained during the conduct of CNP's PRMP and during the plant's operational history.

4.4.10 Gamma Exposure Rate Direct radiation was continuously measured at 27 locations surrounding CNP with thermoluminescent dosimeters (TLDs). All TLDs were collected quarterly and processed by Stanford Dosimetry at the Environmental Dosimetry Company laboratory in Sterling, Massachusetts.

The results in Tables 3.2 and 3.3 show that the mean exposure rates for the onsite and offsite categories were not significantly different in total for 2011. As shown in Figure 4.6, there is a similar annual cycle at both onsite and offsite locations. The lowest point of the cycle typically occurred during the winter months. This was attributed primarily to the attenuating effect of the snow cover and frozen ground on radon emissions and on direct irradiation by naturally-occurring radionuclides in the soil. Also contributing to the variation in radiation levels at different field sites was the varying distribution of radionuclides in the underlying soil, rock or nearby building materials. Figure 4.6 also illustrates that the average trend line over the last eight years for the offsite stations runs slightly higher than that for the onsite stations, suggesting that there is no detectable plant component of direct radiation that can be seen above the natural background exposure rate.

In July 2010, the Environmental Dosimetry Company assumed responsibility for calibration and processing of the TLDs used for these activities. The Panasonic Model UD-814 AS4 TLDs that had historically been used to measure direct radioactivity around CNP continued to be in use.

The information detailed above was evaluated and found to be consistent with data obtained during the conduct of CNP's PRMP.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 4.6 DIRECT RADIATION - QUARTERLY TLD RESULTS I

I I

7 6

5 I

I 4 3

2 1

0

Offs TLNs ---- Oria TLO n j 4.4.11 Additional Sample Analysis (non-ODCM required samples)

Groundwater (Radioactive Equipment Storage Facility, Steam Generator wells) - Two one-liter well water samples were taken at 4 locations quarterly. These samples were analyzed for gamma isotopic and gross alpha/beta by GEL laboratories. Naturally-occurring K-40 was detected in 3 samples [See Appendix D]. Twelve of 16 samples indicated the presence of gross beta activity, which is consistent with operational history. Measured tritium activities in the samples were all found to be less than the MDC [See Table 3.1]. Figure 4.7 shows a plot of the tritium concentration in these samples. Tritium in these wells is also being tracked by the CNP Groundwater Protection Initiative and is discussed further in Appendix F.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Figure 4.7 Tritium In Informational Groundwater Wells 11000 4W 0

I 0

-280 A. L

// / / / / #* 1* ¶

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 5.0 OFF-SITE DOSE EQUIVALENT COMMITMENTS The purpose of this section is to evaluate off-site dose consequences (dose equivalent commitments) associated with CNP radioactive liquid and airborne effluents. The method utilizes Regulatory Guide 1.109/ODCM models and actual measurements of the concentrations of radioactivity in environmental media to compute the dose consequences resulting from the consumption of these foods.

The dose commitments calculated in this section are compared to the ALARA dose objectives of 10CFR50 Appendix I for liquid and/or gaseous effluents. These standards are a fraction of the average USA background radiation of 300 mrem per year given in NCRP 94 (Reference 2).

Some air samples had measured concentrations above the MDC for both Cs-137 and I-131 (Table 3.1) and are summarized in Tables 5.1 and 5.2 below. The presence of both of these radionuclides was determined to not be from the result of operations at the Cook Plant. Given that, the dose impact from inhalation of these radionuclides for the period in which the measurements showed them present (assumed 2 months), yielded a total critical organ dose of 1.92E-1 mrem/year to the thyroid (for the child age group).

This represents 1.3% of the organ dose objectives of 10CFR50 Appendix I.

TABLE 5.1: Cs-137 Concentrations in Air Samples Concentration Media Station Sample (pCi/m3) End Date Air Sample NBF 284170001 0.000626 6-29-11 Air Sample ONS-2 284170006 0.000370 6-29-11 Air Sample ONS-3 , 284170007 0.000657 6-29-11 Average 0.000551 TABLE 5.2:1-131 Concentrations in Air Samples Concentration Media Station Sample (pCi/m3) End Date Air Sample ONS-6 274661021 0.0994 3-23-11 Air Sample ONS-6 275048021 0.0321 3-23-11 Air Sample ONS-6 , 275654021 0.0819 3-30-11 Average 0.0711 Fish samples had measured concentrations above the MDC for Cs-137 (Table 3.1) and are summarized below in Table 5.3. The presence of this radionuclide was determined to not be from the result of operations at the Cook Plant. Given that, the dose impacts from ingestion of the radionuclide yielded a total dose of 3.94E-2 mrem/year total body (for the adult age group) and 6.27E-2 mrem/year to the liver (for the teen age group).

This represents 1.3 % and 0.6% of the total body and organ dose objectives of 10CFR50 Appendix I.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 TABLE 5.3: Cs-137 Concentrations in Fish Samples Media Station Sample Concentration Date Meda_Satin Smpl (pCi/kg)

Fish OFS-N 279803001 36.9 6-8-11 Fish ONS-S 279803003 36 6-8-11 Fish OFS-S 279803004 14.5 6-8-11 Fish TRT 14 NNW 285554001 16.8 9-1-11 Fish SLM 14 NNW 285554002 25 9-1-11 Fish ONS-N 287658002 28.8 10-4-11 Fish ONS-S 287658003 26.4 10-4-11 Average 26.3 Some milk samples had measured concentrations above the MDC for both Cs-137 and 1-131 (Table 3.1) and are summarized in Tables 5.4 and 5.5 below. The presence of both of these radionuclides was determined to not be from the result of operations at the Cook Plant. Given that, the dose impacts from ingestion of these radionuclides for the period in which the measurements showed them present (assumed 2 months), yielded a total critical organ dose of 4.68E-1 mrem/year to the thyroid (for the child age group).

This represents 3.1%. of organ dose objectives of IOCFR50 Appendix I.

TABLE 5.4: Cs-137 Concentrations in Milk Samples Station Media Same Concentration Date Media tation Sample (pCi/kq) Dt Milk MON 276211023 2.6 4-13-11 TABLE 5.5:1-131 Concentrations in Milk Samples Media Media_ 1I Station Station Sample Sample___

Concentration (pCi/kg)

Date Date Milk MON 275048023 1.38 3-30-11 Milk MON 276211023 1.48 4-13-11 Average 1.43 Broadleaf samples measured concentrations above the MDC for Cs-137 (Table 3.1) and are summarized below in Table 5.6. The presence of this radionuclide was determined to not be from the result of operations at the Cook Plant. Given that, the dose impacts from ingestion of the radionuclide yielded a total critical organ dose of 3.02E-1 mremiyear to the bone (for the child age group). This represents 2.0% of the organ dose objectives of IOCFR50 Appendix I.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 TABLE 5.6: Cs-137 Concentrations in Broadleaf Samples Media Station Sample Concentration Date (pCi/kg)

Broadleaf ONS3-V 278897003 59.1 5-24-11 Broadleaf ONS3-V 278897002 12.6 5-24-11 Broadleaf ONS1-V 284441005 19.3 7-18-11 Broadleaf ONS3-V 284441001 108 7-18-11 Broadleaf ONS3-V 286496003 156 9-22-11 Average 71 Table 5.7 summarizes each of the dose commitments calculated for each of the media.

TABLE 5.7: Summary of Off-site Dose Commitments for Comparison with 10 CFR 50 Appendix I Objectives Media Nuclide Limiting Organ Dose Whole Body Dose

[age group] (mrem/yr) (mrem/yr)

Air Cs-137 Bone [child] 8.32E-5 N/A Air 1-131 Thyroid [child] 1.92E-1 N/A Air Total Thyroid [child] 1.92E-1 N/A Fish Cs-I 37 Liver [Teen] 6.27E-2 3.94E-2 Milk Cs-1 37 Bone [Child] 4.86E-2 N/A Milk 1-131 Thyroid [Child 4.68E-1 N/A Milk Total Thyroid [Child] 4.68E-1 N/A Broadleaf Cs-1 37 Bone [Child] 3.02E-1 N/A Note (1) The limiting organ for the combination of all radionuclides is the organ with the highest dose after combining the resultant dose to each organ.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 6.0

SUMMARY

OF REMP, ODCM, AND VENDOR PROCEDURE CHANGES The ODCM had no revisions in 2011. REMP procedure changes for 2011 are detailed below.

Procedure No.: 12-THP-6010-RPP-601 Rev. No.: 9

Title:

Preparation of the Annual Radioactive Effluent Release Report Alteration Justification Step 7.1.4, Use Reference - Added new This is a correction per reference "40 CFR 190, Environmental PMP-2010-PRC-002. GT 2011-2497.

Radiation Protection Standards For Nuclear Power Operations" and removed from Source Reference.

Step 7.1.5, Use Reference - Added new This is a correction per reference "10 CFR 20, Appendix B, Table PMP-2010-PRC-002. GT 2011-2497.

2, Column 2" and removed from Source Reference.

Step 7.1.6, Use Reference - Added new This is a correction per reference "Regulatory Guide 1.109, PMP-2010-PRC-002. GT 2011-2497.

Revision 1, October 1977" and removed from Source Reference.

Step 7.1.7, Use Reference - Added new This is a correction per reference "Regulatory Guide 1.21, Revision PMP-2010-PRC-002. GT 2011-2497.

1, June 1974" and removed from Source Reference'.

Added the following procedures to the This is a correction per General

Reference:

PMP-2010-PRC-002. GT 2011-2497.

12-OHP-4021-006-001 12-OHP-4021-006-004 12-OHP-021-023-002 1 and 2-OHP-4021-028-004 1 and 2-OHP-4021-028-005 1 and 2-OHP-4021-051-007 12-THP-6020-ADM-010.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-603 Rev. No.: 14

Title:

GASEOUS WASTE RELEASES (MANUAL CALCULATIONS)

Alteration Justification Step 7.1.6, Use Reference - Added new This is a correction per reference 12-THP-6010-RPI-805, PMP-2010-PRC-002. GT 2011-2494.

Radiation Monitoring System Setpoints.

Procedure Number: 12-THP-6010-RPP-603 Revision: 15

Title:

GASEOUS WASTE RELEASES (MANUAL CALCULATIONS)

Alteration Justification 10 CFR 50.59 The change made in the revision to this administrative procedure is specific to and implements the requirements of 10 CFR 20 Standards for Protection Against Radiation, PMP-6010-OSD-001, Off-site Dose Calculation Manual, and was processed in accordance with PMP-2010-PRC-002, Procedure Alteration, Review, and Approval; therefore, 10 CFR 50.59 is not applicable to this change.

Step 3.4: Removed "RP" from step as This is an administrative issue only and is in personnel allowed to perform manual gas accordance with AR 00864741 direction.

release calculations. RP personnel are not trained to perform this procedure. ECC 1 applies. This is not a change of intent.

Step 4.4: Removed "RP" from Note prior to This is an administrative issue only and is in step as personnel allowed to perform manual accordance with AR 00864741 direction.

gas release calculation reviews. RP personnel are not trained to perform this procedure. ECC 1 applies. This is not a change of intent.

Step 6.2: Removed "RP" from step as This is an administrative issue only and is in personnel allowed to perform manual gas accordance with AR 00864741 direction.

release calculation reviews. RP personnel are not trained to perform this procedure. ECC 1 applies. This is not a change of intent.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Data Sheet 1: Removed "RP" from all This is an administrative issue only and is in signature signoffs and certification signoffs. accordance with AR 00864741 direction.

RP personnel are not trained to perform this procedure and cannot certify or signoff steps in this procedure. ECC 1 applies. This is not a change of intent.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-632 Rev. No.: 8

Title:

COLLECTION OF ENVIRONMENTAL AIR SAMPLES Alteration Justification Use References - Deleted Steps 7.1.2 The text of the procedure does not direct the and 7.1.3. Renumbered subsequent step. user to these referenced procedures. This is a correction per PMP-2010-PRC-002.

AR 2011-1637-7.

Procedure No.: 12-THP-6010-RPP-632 Rev. No.: 9

Title:

COLLECTION OF ENVIRONMENTAL AIR SAMPLES Alteration Justification Re-worded Step 3.5 to make a "shall" Minor enhancement to remove soft action statement and ensure the briefing covers words and to ensure active actions to prevent handling of the sample. cross contamination. This is a correction per PMP-2010-PRC-002. GT 2011-6957-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-633 Rev. No.: 6

Title:

COLLECTION OF ENVIRONMENTAL RADIATION DOSIMETERS Alteration Justification Global - on procedure numbers, changed Format. This is a correction per from "dots" to "space." No marginal marks. PMP-2010-PRC-002.

Step 7.1.2, Use Reference - Added new This is a correction per reference "12-THP-6010-RPP-630, PMP-2010-PRC-002. GT 2011-2489.

Collection of REMP Surface Water Samples."

Procedure No.: 12-THP-6010-RPP-634 Rev. No.: 12

Title:

COLLECTION OF REMP GROUNDWATER SAMPLES Alteration Justification Reference - Added Step 7.1.3, Use This is a correction per Reference to "12-THP-6010-RPP-630, PMP-2010-PRC-002. AR 2011-1637-1.

Collection of REMP Surface Water Samples."

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-635 Rev. No.: 3

Title:

COLLECTION OF MILK SAMPLES Alteration Justification Reference - Added Step 7.1.3, Use This is a correction per Reference to "12-THP-6010-RPP-630, PMP-2010-PRC-002. AR 2011-1637-2.

Collection of REMP Surface Water Samples."

Procedure No.: 12-THP-6010-RPP-635 Rev. No.: 4

Title:

COLLECTION OF MILK SAMPLES Alteration Justification Step 4.2.1 - Added "IF clarification is Clarification. This is a correction per needed, THEN inform REMP Coordinator" PMP-2010-PRC-002 at the end of sentence.

Attachment 1 - Deleted and added a new To update to the current addresses of farms Milk Sampling Locations. visited. This is a correction per PMP-2010-PRC-002. GT 2011-8498.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-636 Rev. No.: 3

Title:

COLLECTION OF FISH SAMPLES Alteration Justification Global - on procedure numbers, Format. This is a correction per PMP-2010-changed from "dots" to "space." No PRC-002.

marginal marks.

Step 7.1.2, Use Reference - Added new This is a correction per PMP-2010-PRC-002.

reference "12-THP-6010-RPP-630, GT 2011-2488-1.

Collection of REMP Surface Water Samples."

Procedure No.: 12-THP-6010-RPP-636 Rev. No.: 4

Title:

COLLECTION OF FISH SAMPLES Alteration Justification Step 2.1 - Added new bullet. AR 2011-5416-2 Step 2.2 -Moved Step 3.5 This step is the transposition of the former step 3.5. along with the additional words "when netting". AR 2011-5416-2 Step 3.5 - Replaced Step 3.5 AR 2011-5416-2 Steps 4.2.2 & 4.2.3 - Added new Steps and AR 2011-5416-2 renumbered subsequent Steps.

Steps 7.1.3 & 7.1.4 - Added new AR 2011-5416-2 references.

Alterations to this procedure were administrative in nature and are entirely governed by 10 CFR 50, Appendix B, and are therefore not subject to the requirements of 10 CFR 50.59.

Procedure No.: 12'THP-6010-RPP-637 Rev. No.: 6

Title:

COLLECTION OF REMP LAKE SEDIMENT AND SOIL SAMPLES Alteration Justification Step 7.1.3, Use Reference - Added new This is a correction per reference "12-THP-6010-RPP-630, PMP-2010-PRC-002. GT 2011-2490.

Collection of REMP Surface Water Samples."

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-638 Rev. No.: 5

Title:

COLLECTION OF GRAPE AND BROADLEAF SAMPLES Alteration Justification Step 7.1.3, Use Reference - Added new This is a correction per reference "12-THP-6010-RPP-630, PMP-2010-PRC-002. GT 2011-2491.

Collection of REMP Surface Water Samples."

Procedure No.: 12-THP-6010-RPP-639 Rev. No.: 6

Title:

Annual Radiological Enyironmental Operating Report (AREOR) Preparation and Submittal Alteration Justification Step 7.1.1, Use Reference - Added new This is a correction per reference "PMI-2030, Nuclear Document PMP-2010-PRC-002. GT 2011-2496.

Management" and renumbered subsequent steps.

Step 7.1.3, Use Reference - Added new This is a correction per reference "PMP-6010-PCP-900, Radioactive PMP-2010-PRC-002. GT 2011-2496.

Waste Control Program" and renumbered subsequent steps.

Step 7.1.6, Use Reference -. Added new This is a correction per reference "12-THP-6010-RPP-634, PMP-2010-PRC-002. GT 2011-2496.

Collection Of REMP Groundwater Samples."

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-642 Rev. No.: 6

Title:

COLLECTION OF DRINKING WATER SAMPLES Alteration Justification Step 7.1.2, Use Reference - Added This is a correction per PMP-6010-OSD-001, Off-Site PMP-2010-PRC-002. GT 2011-2492.

Dose Calculation Manual (ODCM) and removed from Source Reference.

Procedure No.: 12-THP-6010-RPP-642 Rev. No.: 7

Title:

COLLECTION OF DRINKING WATER SAMPLES Alteration Justification Steps 2.4, 2.5, 2.6, 4.3, 4.4.6, and 6.2 were Condition evaluation performed for revised for a program change from daily AR 2011-3499 sample analysis to a weekly composite sample.

Step 6.1, Corrected procedure number for Typo and clarifying information. This is a 12-THP-6010-RPP-630 and added Acidified correction per PMP-2010-PRC-002.

and Non-Acidified before Composite.

Per Attachment 1 of PMP-2010-PRC-002, this is an administrative procedure governing the conduct of facility operations. Also all changes to this procedure implement the ODCM.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Procedure No.: 12-THP-6010-RPP-643 Rev. No.: 8

Title:

Quarterly Review of Radiological Environmental Monitoring Program (REMP) Data Alteration Justification Step 7.1.2, Use Reference - Added new This is a correction per reference "12-THP-6010-RPP-634, PMP-2010-PRC-002. GT 2011-2495.

Collection Of REMP Groundwater Samples" and removed from Source Reference.

Step 7.1.3, Use Reference - Added new This is a correction per reference "12-THP-6010-RPP-637, PMP-2010-PRC-002. GT 2011-2495.

Collection Of REMP Lake Sediment And Soil Samples" and removed from Source Reference.

Step 7.1.4, Use Reference - Added new This is a correction per reference "Environmental Guide, ENVG- PMP-2010-PRC-002. GT 2011-2495.

TVD-1, Collection Of Thronton Valley Drain Samples."

Step 7.1.5, Use Reference - Added new This is a correction per reference "Environmental Guide, PMP-2010-PRC-002. GT 2011-2495.

ENVG-PCIP- 1, Collection Of Precipitation Samples."

Step 7.1.6, Use Reference - Added new This is a correction per reference "NEI 07-07 [Final], Industry PMP-2010-.PRC-002. GT 2011-2495.

Ground Water Protection Initiative - Final Guidance Document, August 2007" and removed from General Reference, Step 7.2.2a.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 6.1 below summarizes the changes made by GEL Laboratories, and Table 6.2 summarizes the changes made by Environmental Dosimetry Company to the procedures that are used for the Donald C. Cook Nuclear Plant REMP.

Table 6.1 GEL Laboratories, LLC Updated Procedures for Support of Nuclear Power Plants Calendar Year 2011 UpuULIu 'Jr LoinIuur tiquiu scintillation high density polyethylene vials to apparatus and equipment section.

GL-RAD-A-002 The Determination of Tritium 20 10/2011 Updated SOP to include the inspection of glassware prior to use.

GL-RAD-A-006 The Determination of Radiometric 17 12/2011 Acceptable precision is a Iodine standard deviation of less than 1.0% of the mean value. Record the standardization results in the appropriate spreadsheet.

Label the carrier solution with the standardization results.

GL-RAD-A-013 The Determination of Gamma Isotopes 21 3/2011 SOP revised to add Ra-226, NIST traceable gamma standards, and other clarifications.

GL-RAD-A-0 13 The Determination of Gamma Isotopes 22 4/2011 Updated ingrowth period for Ra-226 to 20 days.

GL-RAD-A-021 Soil Sample Preparation for the 17 1/2011 The time required to obtain a Determination of Radionuclides dry sample will vary depending on the type of material, size of sample, oven type and capacity, and other factors. The influence of these factors generally can be established by good judgment, experience with the materials being tested, and the apparatus being used.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 GL-RAD-A-021 Soil Sample Preparation for the 18 2/2011 Changed 8.14-8.17 to 8.15-Determination of Radionuclides 18.17 in section 8.12.

Determine an appropriate aliquot based on the analysis required. Normally, depending upon the required analysis, the sample will be passed through a 28 mesh sieve screen. For clients that require a smaller particle size, continue homogenizing 8.1.4 samples per section 8.15.

GL-RAD-A-038 The Isotopic Determination of Thorium 13 5/2011 Changed stainless steel to metal in sections 2.2 and 8.1.4.

GL-RAD-D-002 Analytical Methods Validation for 4 1/2011 SOP updated throughout for Radiochemistry clarification and improvements.

GL-RAD-D-003 Data Review, Validation and Data 28 2/2011 Added direction for alpha Package Assembly spectroscopy review of spectral data to ensure peak area falls within Region of Interest.

GL-RAD-D-003 Data Review, Validation and Data 29 6/2011 SOP revised to reflect TNI Package Assembly EL-V 1.2009. Added MARLAP Ch. 18 Z score calculations.

GL-RAD-D-003 Data Review, Validation and Data 30 5/2011 Added crosstalk values Package Assembly formula and note in section 5.1.3.5 on beta analysis.

Section 7.0 revised to include recent automation changes.

GL-RAD-D-003 Data Review, Validation and Data 31 12/2011 Expand on definitions for Package Assembly TPU GL-RAD-I-001 Gamma Spectroscopy System 15 3/2011 Procedural updates made to Operation SOP to reflect the process currently being used.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 GL-RAD-I-001 Gamma Spectroscopy System 16 8/2011 Added criteria for Operation acceptance of FWHM calibration.

GL-RAD-I-004 Beckman LS-6000/6500 16 8/2011 Note added to section 14.2.7 to clarify instrument calibration expiration dates.

Appendix I updated. NOTE:

Expiration dates for annual instrument calibrations will be the last day of

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 me montn in wnicn me calibration data is acquired.

GL-RAD-I-006 LB4100 Gross Alpha/Beta Counter 12 10/2011 Updated calibration Operating Instructions information for clarification.

GL-RAD-I-009 Alpha Spectroscopy System 12 7/2011 Added section for processing samples via AlphaGEL.

GL-RAD-I-010 Counting Room Instrumentation 19 6/2011 Replaced Weekly liquid Maintenance nitrogen fill with liquid nitrogen fill in section 5.1.1.

GL-RAD-I-012 Managing Statistical Data in the 23 10/2011 Updated section 5.6.3 to Radiochemistry Laboratory conform to the gamma instrument operation SOP.

GL-RAD-I-016 Multi-Detector Counter: Operating 6 10/2011 Updated section on Instructions instrument calibration for clarification.

GL-RAD-I-017 Wallac 1220 Quantalus Liquid 10 10/2011 Note added to section Scintillation Counter 14.2.7 to clarify instrument calibration expiration dates.

Appendix I updated. NOTE:

Expiration dates for annual instrument calibrations will be the last day of the month in which the calibration data is acquired.

GL-RAD-M-001 Preparation and Verification of 27 2/2011 Updates made to provide Radioactive Standards clarifications and improvements to the process for creating Alpha Spec calibration standards.

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table 6.2 Environmental Dosimetry Company Updated Procedures for Support of Nuclear Power Plants Calendar Year 2011 The following procedures were adopted for use through 2011.

Development, Documentation, 600 Verification, and Validation of Computer 0 01/14/11 01/14/11 01/14/16 Software Irradiation of Thermoluminescent 705 Dosimeters for the Dosimetry Services 0 01/03/11 01/03/11 01/03/16 Quality Control Program 750 Training and Qualification Guidelines 0 01/05/11 01/05/11 01/05/16 930 Operation of the J. L. Shepherd Model 0 03/01/11 03/01/11 03/01/16 28 Cesium-137 Irradiator 935 Operation of Williston Elin Irradiator 0 03/01/11 03/01/11 03/01/16 1010 Setup of the Panasonic Dosimetry 0 01/05/11 01/05/11 01/05/16 System 1012 Maintenance of the Panasonic UD-710A 0 01/03/11 01/03/11 01/03/16 TLD Reader 1014 Calibration 0 01/05/11 01/05/11 01/05/16 TLD Readerof the Panasonic UD-710A 1022 Generation of Element Correction 0 01/20/11 01/20/11 01/20/16 Factors for Panasonic TLDs 1026 Panasonic Quality Control TLD 0 12/23/10 12/23/10 12/23/15 Preparation 1030 Daily Quality Control Response Check 0 12/23/10 12/23/10 12/23/15 of the Panasonic UD-71OA TLD Reader 1032 Capture of Panasonic TLD Data 0 12/23/10 12/23/10 12/23/15 1040 Receipt and Routine Processing of 0 01/18/11 01/18/11 01/18/15 Panasonic TLD Badges 1042 Dose Report Generation for Panasonic 0 01/18/11 01/18/11 01/18/15 Personnel TLD Badges 1046 Panasonic TLD Data Evaluation 0 01/18/11 01/18/11 01/18/15 1052 Panasonic TLD Badge Assignment 0 12/23/10 12/23/10 12/23/15

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 1062 Processing of Environmental TLDs* 0 12/23/10 1 12/23/10 12/23/15 For 2011, the following revisions occurred to these procedures:

___________________________ ION Chariý h ang~igIVE TITLET MA.TE Revised to incorporate Quality System Manual 1 4/21/11 4/21/11 administrative changes to satisfy audit recommendations

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011

7.0 REFERENCES

1. USNRC Radiological Assessment Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program," Revision 1, November 1979.

2. NCRP Report No. 94, Exposure of the Population in the United States and Canada from Natural Background Radiation, National Council on Radiation Protection and Measurements, 1987.

8.0 ERATA FROM 2010 AREOR Page 67 of the 2010 Annual Radiological Environmental Operating Report contained an error.

AREVA has generated a CR (2012-1072) to document the occurrence and mitigating practices.

CNP also has initiated an A/R (2012-1440-6) to track this. The associated text should read:

"Informational Groundwater Wells - Samples were collected at several locations during 2010 and analyzed for tritium by the CNP Chemistry Department or an offsite laboratory. Activity ranged from less than the MDC to 9090 pCi/L."

Donald C. Cook Nuclear Plant nNAnnual Radiological Environmental Operating Report 2011 APPENDIX A SYNOPSIS OF ANALYSIS TECHNIQUES A-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 GEL Labs" GROSS ALPHA/BETA ANALYSIS Air particulate samples, collected on a weekly basis aid in verifying the in-plant controls used for monitoring the release of radioactive materials. The samples are transmitted to the laboratory for gross beta radioactivity analysis. Air particulate samples are analyzed on a low background alpha/beta gas proportional counting unit, for a predetermined amount of time, following a delay to allow for the decay of radon products. Blank filters, either provided by the client, or of the same size and type as the client filters are used for background subtraction. Ifthe beta activity concentration is greater than 0.2 pCi/M 3, the sample may need to be analyzed for individual gamma emitters. Each sample is composited by sampling location and held until the end of the quarter for a gamma isotopic analysis.

Environmental water samples are also analyzed for gross alpha and/or gross beta radioactivity.

Measurable amounts of alpha and beta emitting radionuclides, either naturally-occurring or artificially produced, are found in most environmental water samples. Gross alpha and gross beta measurements are rapid screening methods that may indicate the need for a more detailed isotopic analysis. Samples are evaporated to near dryness and quantitatively transferred to concentric ring, stainless steel planchets, where the evaporation is completed as described in EPA Method 900.0. A gas proportional counter is used for the measurement of gross alpha/gross beta radioactivity. Solid deposition is an interference in this method and must be accounted for during instrument calibration.

No decay is accounted for in the gross alpha/beta activity concentration calculations since the radionuclides of origin are not known. The minimum detectable concentration depends on sample size, counting system characteristics, background, and counting time. Typical counting times for gross alpha/beta analyses are seventy-five minutes for waters and sixty minutes for air particulate filters.

GAMMA SPECTROMETRY The following media are typically analyzed for gamma-emitting radionuclide activity: milk, water, charcoal cartridges, airborne particulate filters, biological material (which includes aquatic animals, plants, and terrestrial vegetation), and sediment or soil samples. Samples are prepared by various controlled methods (blending, drying, milling) in order to maximize the volume that can be analyzed, and to achieve sample homogeneity. In order to ensure the precision and accuracy of the gamma measurements, specific counting containers are used to load sample media in a reproducible manner. Sample spectra are collected via high purity germanium based gamma ray spectrometry detection systems. The gamma spectrometry software can account for baseline corrections, background peak interferences, and photopeak multiplet resolution. Detected photopeaks are identified using a comprehensive library, specifically tailored for environmental monitoring around nuclear power facilities. Typical counting times for gamma spectrometry analyses vary from 7,200 to 30,000 seconds.

A-2

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 LOW LEVEL IODINE ANALYSIS The low detection limit required for 1-131 in milk and water samples can only be achieved by radiochemical separation and concentration of the iodine.

Iodate carrier is added to an acidified sample and, after reduction with Na 2SO 4 to iodide, the I-131 is precipitated with AgNO 3. The precipitate is dissolved and purified with Zinc powder and H2SO 4 and the solution is re-precipitated as Pdl 2 , which is then filtered on to a polypropylene filter and counted on a low background gas flow. proportional counter.

H-3 ANALYSIS The determination of tritium in environmental matrices basically involves a sample preparation step followed by distillation and analysis of the pure distillate by liquid scintillation spectrometry.

The tritium counting efficiency is determined using an efficiency curve generated as a function of sample quench. A set of NIST traceable standards is used for calibration.

The sample preparation step involves extracting H-3 from the matrix in the presence of NaOH and KMnO 4 allowing for sufficient equilibration time so that a complete transposition of tritium with stable hydrogen has occurred.

A-3

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 APPENDIX B 2011 LAND USE CENSUS B-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 Radiological Environmental Monitoring Program Land Use Census Summary Date: September 13, 2011 Purpose A Land Use Census (LUC) is performed annually to identify relevant changes in land usage in the area surrounding Cook Nuclear Plant (CNP) which have the potential to affect radiation exposure pathways. Identified changes are evaluated to determine if modifications should be made to the Radiological Environmental Monitoring Program (REMP) or other related programs.

A summary of the 2011 LUC is detailed below.

Dairy Farm Survey A dairy farm survey was conducted from June 21 through August 26, 2011, to update the following information.

" Dairy farms located in the area around the CNP (within Berrien County, MI)

Location nearest to CNP where animal milk is produced for human consumption.

As a result of information obtained during the census period it was determined that two identified dairy farms, both in Sector J, had ceased milking operations:

John or Kevin Warmbein Farm, 14860 Mill Road, Three Oaks, MI, 49128 Paul Lozmack Farm, 4193 Elm Valley Rd., Three Oaks, MI 49128 Discussions are underway to add a third Indicator Milk farm location (Greg Schafer Farm in Sector G) to the REMP Dairy Farm Milk sampling program.

At the present time, due to the cessation of milking operations at the Glen Troy Farms in 2004, only two indicator (within eight miles of the CNP) farms/residences have dairy animals providing milk for human consumption and participate in the CNP REMP Dairy Farm Milk sampling program. These farms are:

Monroe Residence (REMP Designation: MR) 10627 Miller Road Baroda, MI 49101 Shuler Farm (REMP Designation: SF) 2791 Snow Rd.

Baroda, 49101 B-2

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 CNP REMP requirements specify a minimum of three indicator (within 8 miles of CNP) milk farms are needed to support the milk sampling process. Due to the lack of a third indicator milk farm, the milk sampling program is considered suspended at this time.

In accordance with REMP guidance, Broadleaf sampling "in-lieu of' milk continues to be conducted as a compensatory action for this condition. Additionally, it was concluded that milk sampling would remain in effect at the remaining REMP-related locations for informational purposes and to support the restart of this program in the event a third farm becomes available.

Finally, the census identified the closest animals (cows) providing milk for human consumption as follows:

Shuler Farm (REMP Designation: SF)

Sector/Distance from CNP: G and H /4.1 miles (21,648 feet) 2791 Snow Rd.

Baroda, 49101 Livestock for Consumption Survey During the time period June 21 through August 26, 2011, the Livestock Survey examined farms near CNP that produce livestock for consumption to determine the location closest to CNP in each land sector within 5 miles. The location which was determined to be the "Closest Livestock for Consumption (meat)" did not change from the 2010 report and was given REMP designation MEAT (Distance From CNP: 1.42 miles [7,498 feet]) and recorded as part of this census on the associated Data Sheet 1 to 12-THP-6010-RPP-640 "Land Use Census".

Residential Land Use Survey From June 1, 2010 to June 1, 2011, one new residential building permit was issued in the Lake Township sections that border the CNP property (sections 5, 6, 7, and 8). As this permit location is within Sector J and approximately 1.14 mi from CNP, it did not affect designations of the "closest residence" in that sector, and no further consideration for the purposes of residential radiological evaluations was required.

Per email correspondence with the Berrien County Health Department, there were no groundwater permits issued in Lake Township Sections 5, 6, 7, or 8 during this time period.

Garden Census, Grape and Broadleaf Samplingq During the time period June 21 through August 26, 2011, a survey of nearby properties verified that a garden located at 7379 Rosemary Rd. (0.91 miles [4,805 feet] from CNP), in Sector C, is still the "Closest Garden Producing Fresh Leafy Vegetables."

In lieu of conducting the Garden Census as part of this LUC, Broadleaf sampling was performed as follows:

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Monthly indicator broadleaf samples were obtained at two locations within Sector J:

-On the CNP site boundary along Livingston Road near Groundwater well W-13

-Along Rambo Road just east of Red Arrow Highway in Bridgman, MI Monthly control broadleaf samples were taken on East Clay Street in New Buffalo, MI, just NE of New Buffalo High School in Sector K.

The 2011 Land Use Census identified no relevant changes in usage to areas surrounding DC Cook Nuclear Plant. The identified changes in this report have been evaluated per PMP-6010-OSD-001 "Off-Site Dose Calculation Manual" and represent no changes in dose commitment.

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 APPENDIX C QUALITY ASSURANCE PROGRAM C-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 APPENDIX C: QUALITY ASSURANCE PROGRAMS GEL LABORATORIES GEL's primary goals are to ensure that all measurement data generated are scientifically and legally defensible, of known and acceptable quality per the data quality objectives (DQOs), and thoroughly documented to provide sound support for environmental decisions. In addition, GEL continues to ensure compliance with all contractual requirements, environmental standards, and regulations established by local, state and federal authorities.

GEL administers the QA program in accordance with the Quality Assurance Plan, GL-QS-B-001. The Quality Systems include all quality assurance (QA) policies and quality control (QC) procedures necessary to plan, implement, and assess the work that GEL performs. GEL's QA Program establishes a quality management system (QMS) that governs all of the activities of the organization.

This report entails the quality assurance program for the proficiency testing and environmental monitoring aspects of GEL for 2011.

Quality Assurance Programs for Inter-laboratory, Intra-laboratory and Third Party Cross-Check In addition to internal and client audits, GEL laboratory participates in annual performance evaluation studies conducted by independent providers. GEL routinely participates in the following types of performance audits:

" Proficiency testing and other inter-laboratory comparisons

" Performance requirements necessary to retain Certifications

Evaluation of recoveries of certified reference and in-house secondary reference materials using statistical process control data.

Evaluation of relative percent difference between measurements through SPC data.

GEL also participates in a number of proficiency testing programs for federal and state agencies and as required by contracts. It is GEL's policy that no proficiency evaluation samples be analyzed in any special manner. GEL's annual performance evaluation participation generally includes a combination of studies that support the following:

US Environmental Protection Agency Discharge Monitoring Report, Quality Assurance Program (DMR-QA). Annual national program sponsored by EPA for laboratories engaged in the analysis of samples associated with the NPDES monitoring program.

Participation is mandatory for all holders of NPDES permits. The permit holder must analyze for all of the parameters listed on the discharge permit. Parameters include general chemistry, metals, BOD/COD, oil and grease, ammonia, nitrates, etc.

. Department of Energy Mixed Analyte Performance Evaluation Program (MAPEP). A semiannual program developed by DOE in support of DOE contractors performing waste analyses. Participation is required for all laboratories that perform environmental analytical measurements in support of environmental management activities. This program includes radioactive isotopes in water, soil, vegetation and air filters.

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011

ERA's MRAD-Multimedia Radiochemistry Proficiency test program. This program is for labs seeking certification for radionuclides in wastewater and solid waste. The program is conducted in strict compliance with USEPA National Standards for Water Proficiency study.

" ERA's InterLaB RadCheM Proficiency Testing Program for radiological analyses. This program completes the process of replacing the USEPA EMSL-LV Nuclear Radiation Assessment Division program discontinued in 1998. Laboratories seeking certification for radionuclide analysis in drinking water also use the study. This program is conducted in strict compliance with the USEPA National Standards for Water Proficiency Testing Studies. This program encompasses Uranium by EPA method 200.8 (for drinking water certification in Florida/Primary NELAP), gamma emitters, Gross Alpha/Beta, Iodine-131, naturally-occurring radioactive isotopes, Strontium-89/90, and Tritium.

ERA's Water Pollution (WP) biannual program for waste methodologies includes parameters for both organic and inorganic analytes.

ERA's Water Supply (WS) biannual program for drinking water methodologies includes parameters for organic and inorganic analytes.

" Environmental Cross-Check Program administered by Eckert & Ziegler Analytics, Inc.

This program encompasses radionuclides in water, soil, milk, naturally-occurring radioactive isotopes in soil and air filters.

GEL procures single-blind performance evaluation samples from Eckert & Ziegler Analytics to verify the analysis of sample matrices processed at GEL. Samples are received on a quarterly basis. GEL's Third-Party Cross-Check Program provides environmental matrices encountered in a typical nuclear utility REMP. The Third-Party Cross-Check Program is intended to meet or exceed the inter-laboratory comparison program requirements discussed in NRC Regulatory Guide 4.15, revision 1. Once performance evaluation samples have been prepared in accordance with the instructions provided by the TP provider, samples are managed and analyzed in the same manner as environmental samples from GEL's clients.

Quality Assurance Program for Internal and External Audits During each annual reporting period, at least one internal assessment is conducted in accordance with the pre-established schedule from Standard Operating Procedure for the Conduct of Quality Audits, GL-QS-EO01. The annual internal audit plan is reviewed for adequacy and includes the scheduled frequency and scope of quality control actions necessary to GEL's QA program. Internal audits are conducted at least annually in accordance with a schedule approved by the Quality Systems Director. Supplier audits are contingent upon the categorization of the supplier, and may or may not be conducted prior to the use of a supplier or subcontractor. Type I suppliers and subcontractors, regardless of how they were initially qualified, are re-evaluated at least once every three years.

In addition, prospective customers audit GEL during pre-contract audits. GEL hosts several external audits each year for both GEL clients and other programs. These programs include environmental monitoring, waste characterization, and radiobioassay. The following list of programs may audit GEL at least annually or up to every three years depending on the program.

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011

" NELAC, National Environmental Laboratory Accreditation Program

" DOECAP, U.S. Department of Energy Consolidated Audit Program

DOELAP, U.S. Department of Energy Laboratory Accreditation Program

" DOE QSAS, U.S. Department of Energy, Quality Systems for Analytical Services

ISO/IEC 17025

A2LA, American Association for Laboratory Accreditation

DOD ELAP, US Department of Defense Environmental Accreditation Program

NUPIC, Nuclear Procurement Issues Committee

" South Carolina Department of Heath and Environmental Control (SC DHEC)

The annual radiochemistry laboratory internal audit (1 1-RAD-001) was conducted in March 2011. Two (2) findings, three (3) observations, and four (4) recommendations resulted from this assessment. In April 2011, each finding was closed and appropriate laboratory staff addressed each observation and recommendation.

The Nuclear Procurement Issues Committee (NUPIC) audit was conducted on November 14, 2011 through November 18, 2011. This NUPIC QA audit was performed for the activities and/or documentation/records associated with GEL Laboratories supplying general chemistry, radiochemistry and bioassay analytical services. This audit found that the GEL Laboratories quality system is well documented and/or implemented, and is acceptable.

With the exception of the six (6) audit findings, all of the requirements of GEL Laboratories Quality Assurance Plan audited were found to be satisfactorily implemented, and therefore, "Continued approval of GEL Laboratories as an Appendix B supplier of general chemistry, radiochemistry and bioassay analytical services is recommended."

All responses to the six findings have been adequately addressed by GEL. The Audit Report #

22837-A for Supplier Number 5644 has been posted on the NUPIC website.

Performance Evaluation Acceptance Criteria for Environmental Sample Analysis For intra-laboratory or third party quality control programs that do not have a specific acceptance criteria (i.e. the Eckert-Ziegler Analytics Environmental Cross-check Program),

results will be evaluated in accordance with GEL's internal acceptance criteria.

Performance Evaluation Samples Performance Evaluation (PE) results and internal quality control sample results are evaluated in accordance with GEL acceptance criteria. The first criterion concerns bias, which is defined as the deviation of any one result from the known value. The second criterion concerns precision, which deals with the ability of the measurement to be replicated by comparison of an individual result with the mean of all results for a given sample set.

GEL also evaluates its analytical performance on a regular basis through statistical process control (SPC) acceptance criteria. Where feasible, this criterion is applied to both measures of precision and accuracy and is specific to sample matrix. GEL establishes environmental process control limits at least annually.

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 For Radiochemistry analysis, quality control evaluation is based on static limits rather than those that are statistically derived. Current process control limits are maintained in GEL's AIphaLIMS.

GEL also measures precision with matrix duplicates and/or matrix spike duplicates. The upper and lower control limits (UCL and LCL respectively) for precision are plus or minus three times the standard deviation from the mean of a series of relative percent differences. The static precision criteria for radiochemical analyses are 0 - 20%, for activity levels exceeding the contract required detection limit (CRDL).

Quality Control Program for Environmental Sample Analysis GEL's internal QA Program is designed to include QC functions such as instrumentation calibration checks (to insure proper instrument response), blank samples, instrumentation backgrounds, duplicates, as well as overall staff qualification analyses and statistical process controls. Both quality control and qualification analyses samples are used to be as similar as the matrix type of those samples submitted for analysis by the various laboratory clients. These performance test samples (or performance evaluation samples) are either actual sample submitted in duplicate in order to evaluate the precision of laboratory measurements, or fortified blank samples, which have been given a known quantity of a radioisotope that is in the interest to GEL's clients.

Accuracy (or Bias) is measured through laboratory control samples and/or matrix spikes, as well as surrogates and internal standards. The UCLs and LCLs for accuracy are plus or minus three times the standard deviation from the mean of a series of recoveries. The static limit for radiochemical analyses is 75 - 125%. Specific instructions for out-of-control situations are provided in the applicable analytical SOP.

GEL's Laboratory Control Standard (LCS) is an aliquot of reagent water or other blank matrix to which known quantities of the method analytes are added in the laboratory. The LCS is analyzed exactly like a sample, and its purpose is to determine whether the methodology is in control, and whether the laboratory is capable of making accurate and precise measurements.

Some methods may refer to these samples as Laboratory Fortified Blanks (LFB). The requirement for recovery is between 75 and 125% for radiological analyses excluding drinking water matrix.

Bias (%) = (observed concentration)

100 %

(known concentration)

Precision is a data quality indicator of the agreement between measurements of the same property, obtained under similar conditions, and how well they conform to themselves. Precision is usually expressed as standard deviation, variance or range in either absolute or relative (percentage) terms.

GEL's laboratory duplicate (DUP or LCSD) is an aliquot of a sample taken from the same container and processed in the same manner under identical laboratory conditions. The aliquot is analyzed independently from the parent sample and the results are compared to measure precision and accuracy.

If a sample duplicate is analyzed, it will be reported as Relative Percent Difference (RPD). The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using C-5

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 the MDC for the result of the one below the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.

Difference (%) = (high duplicate result - low duplicate result)

100 %

(average of results)

Summary of Data Results During 2011, forty-three radioisotopes associated with seven matrix types were analyzed under GEL's Performance Evaluation program in participation with ERA, MAPEP, and Eckert & Ziegler Analytics. Matrix types were representative of client analyses performed during 2011. The list below contains the type of matrix evaluated by GEL.

Air Filter

" Cartridge

" Water

Milk

" Soil

Liquid

Vegetation A summary of GEL's quality control for radiological analyses by isotopic analysis and matrix are represented in Table C-1. Each LCS and DUP represents a batch of samples for each isotopic analysis. This summary contains the number of reportable quality control results for GEL clients.

Summary of Participation in the Eckert & Ziegler Analytics Environmental Cross-Check Program During 2011, Eckert & Ziegler Analytics provided samples for 89 individual environmental analyses. The accuracy of each result reported to Eckert & Ziegler Analytics, Inc. is measured by the ratio of GEL's result to the known value. Of the 89 analyses, 98% (87 out of 89) of all results fell within GEL's acceptance criteria. Two analyticalfailures occurred with the analysis of Chromium-51 in water and Strontium-90 in milk and were addressed in the GEL Corrective Action program. The results are summarized in Table C-2.

Quality Control Program for REMP Analyses GEL's internal (intra-laboratory) quality control program evaluated 2314 individual analyses for bias and 2520 analyses for precision for standard REMP matrix and radionuclides. Of the internal quality control analyses evaluated for bias, all (100%) met laboratory acceptance criteria. In addition, all (100%) REMP related internal quality control analyses evaluated for precision were found to be acceptable. The results are summarized in Table C-3.

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 TABLE C-1 2011 RADIOLOGICAL INTRA-LABORATORY DATA

SUMMARY

BIAS AND PRECISION BY MATRIX SLaboratorontrolSample Dup!icate/LCS Duplicate'.

MATRIX' (L-CS) Bias'Criteria (+/- 25%) Precision Criteria (Note 1).

AND WITHIN

OUTSIDEi WITHIN OUTSIDE ANALYSIS C RITERIA CRITERIA , CRITERIA CRITERIA Gamma Spec 7 0 7 0 Gamma Spec Liquid with Ba, La 83 0 125 0 Gamma Spec Liquid with Iodine 10 0 10 0 Gamma Iodine-129 2 0 2 0 Gamma Iodine-131 40 0 125 0 KPA Total Uranium 0 0 2 0 Gas Flow Sr 2nd Count 44 0 41 0 Gas Flow Strontium-90 6 0 6 0 Gas Flow Total Strontium 26 0 26 0 Gross Alpha/Beta 1 0 1 0 ICP-MS Uranium-235, 236, 238 1 0 1 0 Alpha Spec Uranium 661 0 637 0 Alpha Spec Polonium 27 0 47 0 Alpha Spec Thorium 488 0 499 0 Alpha Spec Neptunium 277 0 289 0 Alpha Spec Plutonium 705 0 823 0 Alpha Spec Polonium 8 0 8 0 Alpha Spec Radium-226 1 0 3 0 Alpha Spec Am-241, Curium 551 0 569 0 Alpha Spec Am-243 61 0 65 0 Gamma Iodine-129 200 0 198 0 Gamma Nickel-59 154 0 155 0 Gamma Radium-228 2 0 2 0 Gamma Radium-226 154 0 82 0 Gamma Spec 1132 0 1121 0 Gamma Spec Solid (pCi/Sample) 16 0 31 0 Gamma Spec Solid with Ba, La 8 0 8 0 Gamma Spec Solid with Iodine 2 0 2 0 Gamma Spec Solid with Ra-226, Ra-228 3 0 3 0 LSC Nickel-63 251 0 253 0 LSC Plutonium 190 0 196 0 LSC Promethium-147 21 0 21 0 LSC Rapid Strontium 89 and 90 101 0 104 0 LSC Selenium-79 7 0 7 0 LSC Calcium-45 1 0 1 0 LSC Iron-55 171 0 175 0

[SC Chlorine-36 2 0 2 0 LSC Tritium 426 0 430 0 C-7

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Laboratory Control Sample Duplicate/LCS DuplIcate MATRIX (LCS) Bias Criteria (+/- 25%) Precision Criteria (Note 1)

AND WITHIN OUTSIDE WITHIN OUTSIDE ANALYSIS CRITERIA CRITERIA CRITERIA CRITERIA LSC Organically Bound Tritium 20 0 25 0 LSC Carbon-14 237 0 243 0 LSC Technetium-99 316 0 339 0 LSC Total Activity 23 0 22 0 LSC Total Activity Screen 19 0 19 0 Lucas Cell Radium-226 37 0 38 0 Lucas Cell Radium-226 HASL 300 Ra-04 4 0 3 0 KPA Total Uranium 8 0 12 0 ICP-MS Uranium-233, 234 95 0 101 0 ICP-MS Technetium-99 228 0 234 0 ICP-MS Uranium-233, 234 93 0 90 0 ICP-MS Uranium-235, 236, 238 152 0 137 0 ICP-MS Uranium-234, 235, 236, 238 99 0 93 0 Gas Flow Sr 2nd Count 25 0 26 0 Gas Flow Strontium-90 380 0 385 0 Gas Flow Total Strontium 45 0 46 0 Gas Flow Total Radium 3 0 3 0 Gas Flow Radium-228 2 0 2 0 Gas Flow Radium-228 21 0 20 0 Gas Flow Lead-21 0 36 0 37 0 Gross Alpha/Beta 493 0 478 0 Gross Alpha/Beta (Americium Calibration) 1 0 1 0 Alh Specraniu 106013 Alpha Spec Uranium 106 0 132 0 Alpha Spec Polonium 1 0 10 0 Alpha Spec Thorium 54 0 87 0 Alphaspec Np (Filter/Liter) 25 0 37 0 Alphaspec Pu (Filter/Liter) 24 0 32 0 Alpha Spec Plutonium 173 0 206 0 Alpha Spec Neptunium 72 0 83 0 Alpha Spec Polonium (Filter/Liter) 0 0 8 0 Alpha Spec Am-241, Curium 118 0 144 0 Alphaspec Am-241, Curium (Filter/Liter) 35 0 49 0 Alpha Spec Am-243 8 0 9 0 Gamma Spec Filter Direct Count 2 0 2 0 Gamma Spec 369 0 393 0 Gamma Nickel-59 93 0 106 0 Gamma Iodine-131 9 0 9 0 Gamma Iodine-125 12 0 0 0 Gamma Iodine-129 123 0 131 0 LSC Total Activity 3 0 4 0 LSC Plutonium 93 0 115 0 LSC Iron-55 99 0 108 0 LSC Nickel-63 104 0 126 0 LSC Selenium-79 0 0 1 0 C-8

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Laboratory Control Sample Duplicate/LCS Duplicate, MATRIX (LCS) Bias Criteria ( 25%) Precision Criteria (Note 1)'

AND WITHIN OUTSIDE WITHIN OUTSIDE ANALYSIS CRITERIA CRITERIA CRITERIA CRITERIA LSC Promethium-147 3 0 5 0 LSC Rapid Strontium 89 and 90 100 0 125 0 LSC Iron-55 29 0 37 0 LSC Nickel-63 26 0 31 0 LSC Plutonium (Filter/Liter) 29 0 34 0 LSC Technetium-99 83 0 123 0 LSC Tritium 185 0 261 0 LSC Carbon-14 140 0 163 0 KPA Total Uranium 7 0 10 0 Gas Flow Sr 2nd Count 87 0 96 0 Gas Flow Strontium-90 51 0 74 0 Gas Flow Total Radium 1 0 1 0 Gas Flow Total Strontium 4 0 25 0 Gas Flow Pb-210 22 0 38 0 Gas Flow Ra-228 25 0 30 0 Gross Alpha/Beta 614 0 637 0 Direct Count-Gross Alpha/Beta 130 0 5 0 Lucas Cell Ra-226 31 0 43 0 ICP-MS Uranium-234, 235, 236, 238 0 0 3 0 Alpha Spec Uranium 552 0 714 0 Alpha Spec Polonium 5 0 5 0 Alpha Soec Am-243 10 0 17 0 Alpha Spec Thorium 223 0 335 0 Alpha Spec Plutonium 362 0 560 0 Alpha Spec Neptunium 105 0 159 0 Alpha Spec Am-241, Curium 300 0 444 0 Electrolytic Tritium 19 0 25 0 Gamma Spec 794 0 780 0 Gamma Nickel-59 39 0 49 0 Gamma Iodine-129 71 0 136 0 Gamma Iodine-131 33 0 103 0 Gamma Radium-228 0 0 1 0 Gamma Spec Liquid with Ba, La 104 0 140 0 Gamma Spec Liquid with Iodine 133 0 129 0 KPA Total Uranium 87 0 170 0 ICP-MS Technetium-99 30 0 49 0 ICP-MS Uranium-238 0 0 16 0 LSC Total Activity 12 0 21 0 LSC Tritium 1129 0 1199 0 LSC Carbon-14 203 .0 237 0 LSC Technetium-99 275 0 321 0 LSC Iron-55 180 0 232 0 LSC Nickel-63 209 0 242 0 LSC Plutonium 77 0 108 0 C-9

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Laboratory Control Sample Duplicate/LCS Duplicate MATRIX (LCS) Bias Criteria (+/- 25%) Precision Criteria (Note 1)

AND WITHIN OUTSIDE WITHIN OUTSIDE ANALYSIS CRITERIA CRITERIA CRITERIA CRITERIA LSC Radon-222 24 0 25 0 LSC Promethium-147 5 0 18 0 LSC Rapid Strontium 89 and 90 13 0 13 0 LSC Sulfur-35 9 0 9 0 LSC Phosphorus-32 9 0 9 0 LSC Calcium-45 2 0 2 0 Chlorine-36 5 0 9 0 Lucas Cell Radium-226 379 0 416 0 Gas Flow Lead-210 92 0 98 0 Gas Flow Radium-228 311 0 350 0 Gas Flow Sr 2nd Count 226 0 246 0 Gas Flow Strontium-90 473 0 556 0 Gas Flow Strontium 89 & 90 7 0 4 0 Gas Flow Total Radium 50 0 75 0 Gas Flow Total Strontium 135 0 130 0 Gas Flow Total Alpha Radium 6 0 5 0 Gross Alpha/Beta 1242 0 1338 0 Gross Alpha Co-precipitation 11 0 15 0 Gross Alpha Beta (Americium Calibration) 17 0 17 0 ICP-MS Uranium-233, 234 19 0 33 0 ICP-MS Uranium-235, 236, 238 26 0 40 0 ICP-MS Uranium-234, 235, 236, 238 2 0 33 0 Alpha Spec Uranium 5 0 5 0 Alpha Spec Thorium 3 0 3 0 Alpha Spec Plutonium 5 0 5 0 Alpha Spec Neptunium 2 0 2 0 Alpha Spec Plutonium 2 0 2 0 Alpha Spec Am-241, Curium 7 0 7 0 Gamma Nickel-59 2 0 2 0 Gamma Spec 66 0 67 0 Gamma Iodine-129 2 0 2 0 Gamma Spec Solid with Ba, La 7 0 7 0 Gamma Spec Solid with Iodine 17 0 19 0 LSC Nickel-63 9 0 9 0 LSC Plutonium 2 0 2 0 LSC Iron-55 7 0 7 0 LSC Carbon-14 2 0 2 0 LSC Technetium-99 3 0 3 0 LSC Tritium 1 0 1 0 LSC Organically Bound Tritium 1 0 1 0 Lucas Cell Radium-226 1 0 1 0 Gas Flow Sr 2nd Count 19 0 19 0 Gas Flow Strontium-90 17 0 17 0 Gas Flow Total Strontium 12 0 12 0 C-10

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Laboratory Control Sample Duplicate/LCS Duplicate MATRIX - (LCS) Bias Criteria (+/- 25%) Precision Criteria (Note 1)

AND

*. WITHIN OUTSIDE WITHIN OUTSIDE ANALYSIS CRITERIA', CRITERIA CRITERIAk , CRITERIA Gas Flow Lead-21 0 2 0 2 0 Gross Alpha/Beta 2 0 _2 0 VGEaFow 100 Alpha Spec Uranium 26 0 17 0 Alpha Spec Thorium 6 0 6 0 Alpha Spec Plutonium 18 0 11 0 Alpha Spec Am-241 (pCi/Sample) 10 0 3 0 Alpha Spec Am-241, Curium 6 0 4 0 Gamma Spec 16 0 15 0 Gamma Spec Solid with Iodine 83 0 82 0 Gamma Spec Solid (pCi/Sample) 4 0 2 0 LSC Plutonium 1 0 1 0 LSC Carbon-14 3 0 3 0 LSC Tritium 4 0 4 0 Gas Flow Sr 2nd Count 9 0 9 0 Gas Flow Strontium-90 18 0 11 0 Gas Flow Total Strontium 5 0 5 0 Gr 8 0 8 0, AlphaSpec Uranium 2 0 2 0 AlphaSpec Plutonium 2 0 2 0 Alpha Spec Am-241, Curium 2 0 2 0 Gamma Iodine-131 420 0 421 0 Gamma Iodine-129 2 0 2 0 Gamma Spec 5 0 5 0 Gamma Spec 16 0 16 0 Gamma Iodine-129 2 0 6. 0 Gamma Iodine-131 27 0 40 0 Gamma Spec Liquid with Ba, La 74 0 73 0 Gamma Spec Liquid with Iodine 4 0 4 0 LSC Tritium by EPA 906.0 64 0 74 0 LSC Iron-55 11 0 11 0 LSC Nickel-63 12 0 14 0 LSC Radon-222 60 0 63 0 LSC Calcium-45 3 0 3 0 LSC Phosphorus-32 2 0 2 0 KPA Total Uranium 18 0 36 0 Lucas Cell Radium-226 140 0 137 0 Gas Flow Radium-228 127 0 103 0 Gas Flow Sr 2nd Count 11 0 13 0 Gas Flow Strontium-90 21 0 21 0 Gas Flow Strontium 89 & 90 15 0 15 0 Gas Flow Total Alpha Radium 4 0 4 0 Gas Flow Total Strontium 7 0 12 0 C-1l

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011

~Laboratory:Cntrol.Samnple, Dulct/C ulct MATRX(LD Ia Ci~teia(+/--25%) Precision Criteria (Note1)

ADWi THIN OUTSIDEi \WITHINj ~OUTSIDEj ANALYSIS CRITERIA. CRITERIA ~CRITERIA< CSRITERIA Gross Alpha/Beta 284 0 224 0 Gross Alpha Co-precipitation 98 0 80 0 Alpha/Beta (Americium Calibration) 9 0 9 0 Gross Alpha 48 Hr Rapid 7 0 7 0 TOTAL: 20958 0 23066 0 Note 1: The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.

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Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Table C-2:

2011 ECKERT & ZIEGLER ANALYTICS PERFORMANCE EVALUATION RESULTS

SUMMARY

Quarter I Analysis Sample Sample Analyte GEL Known Acceptance Year Date Number Media Unit Nuclide Value value Range/ Ratio Evaluation 1st/2011 01/11/11 E7465-278 Cartridge pCi Iodine-131 1.03E+02 9.47E+01 1.09 Acceptable 1st/ 2011 01/11/11 E7466-278 Milk pCi/L Strontium-89 9.23E+01 9.74E+01 0.95 Acceptable 1st /2011 01/11/11 E7466-278 Milk pCi/L Strontium-90 1.27E+01 1.58E+01 0.80 Acceptable 1st/2011 01/11/11 E7467-278 Milk pCi/L Iodine-131 1.00E+02 9.69E+01 1.03 Acceptable Ist/2011 01/11/11 E7467-278 Milk pCi/L Chromium-51 3.27E+02 2.98E+02 1.10 Acceptable Ist/2011 01/11/11 E7467-278 Milk pCi/L Cesium-134 1.19E+02 1.30E+02 0.91 Acceptable ist/2011 01/11/11 E7467-278 Milk pCi/L Cesium-137 2.20E+02 2.05E+02 1.07 Acceptable Ist /2011 01/11/11 E7467-278 Milk pCi/L Cobalt-58 1.18E+02 1.13E+02 1.04 Acceptable 1st / 2011 01/11/11 E7467-278 Milk pCi/L Manganese-54 2.78E+02 2.66E+02 1.04 Acceptable 1st / 2011 01/11/11 E7467-278 Milk pCi/L Iron-59 1.94E+02 1.75E+02 1.11 Acceptable 1st / 2011 01/11/11 E7467-278 Milk pCi/L Zinc-65 2.88E+02 2.61E+02 1.10 Acceptable 1st / 2011 01/11/11 E7467-278 Milk pCi/L Cobalt-60 1.76E+02 1.72E+02 1.03 Acceptable lst/2011 01/11/11 E7468-278 Water pCi/L Iodine-131 9.73E+01 9.40E+01 1.04 Acceptable 1st / 2011 01/11/11 E7468-278 Water pCi/L Chromium-51 2.16E+02 1.96E+02 1.10 Acceptable 1st / 2011 01/11/11 E7468-278 Water pCi/L Cesium-134 8.52E+01 8.56E+01 0.99 Acceptable I st / 2011 01/11/11 E7468-278 Water pCi/L Cesium-137 1.47E+02 1.35E+02 1.09 Acceptable 1st / 2011 01/11/11 E7468-278 Water pCi/L Cobalt-58 7.71E+01 7.44E+01 1.04 Acceptable 1st / 2011 01/11/11 E7468-278 Water pCi/L Manganese-54 1.88E+02 1.75E+02 1.08 Acceptable 1st/2011 01/11/11 E7468-278 Water pCi/L Iron-59 1.26E+02 1.15E+02 1.10 Acceptable Ist/2011 01/11/11 E7468-278 Water pCi/L Zinc-65 1.90E+02 1.72E+02 1.11 Acceptable 1st/2011 01/11/11 E7468-278 Water pCi/L Cobalt-60 1.14E+02 1.13E+02 1.01 Acceptable 2nd/2011 07/25/11 E7859-278 Cartridge pCi Iodine-131 8.17E+01 8.65E+01 0.95 Acceptable 2nd / 2011 07/25/11 E7860-278 Milk pCi/L Strontium-89 9.68E+01 1.03E+02 0.94 Acceptable 2nd / 2011 07/25/11 E7860-278 Milk pCi/L Strontium-90 1.58E+01 1.56E+01 1.01 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Iodine-131 9.OOE+01 1.03E+02 0.87 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Cerium-141 8.36E+01 7.99E+01 1.05 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Chromium-51 2.39E+02 2.06E+02 1.16 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Cesium-134 1.71E+02 1.90E+02 0.90 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Cesium-1 37 1.43E+02 1.38E+02 1.04 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Cobalt-58 1.50E+02 1.52E+02 0.99 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Manganese-54 1.32E+02 1.38E+02 0.96 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Iron-59 1.43E+02 1.23E+02 1.16 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Zinc-65 2.76E+02 2.61 E+02 1.06 Acceptable 2nd / 2011 07/25/11 E7861-278 Milk pCi/L Cobalt-60 1.92E+02 1,95E+02 0.99 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Zinc-65 3.47E+02 3.05E+02 1.14 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Cobalt-60 2.38E+02 2.28E+02 1.05 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Iodine-131 1.20E+02 1.01E+02 1.19 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Cerium-141 9.30E+01 9.35E+01 0.99 Acceptable Not 2nd / 2011 07/25/11 E7862-278 Water pCi/L Chromium-51 3.36E+02 2.41 E+02 1.39 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Cesium-1 34 2.02E+02 2.22E+02 0.91 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Cesium-137 1.73E+02 1.61 E+02 1.07 Acceptable C-13

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Quarter Analysis Sample Sample alyte I GEL Known Acceptance Year Date Number Media Unit Nuclide Value value Range Ratio Evaluation 2nd / 2011 07/25/11 E7862-278 Water pCi/L Manganese-54 1.66E+02 1.61 E+02 1.03 Acceptable 2nd / 2011 07/25/11 E7862-278 Water pCi/L Iron-59 1.57E+02 1.44E+02 1.09 Acceptable 3rd / 2011 10/19/11 E8095-278 Cartridge pCi Iodine-131 7.69E+01 8.02E+01 0.96 Acceptable 3rd / 2011 10/19/11 E8096-278 Milk pCi/L Strontium-89 9.51E+01 9.08E+01 1.05 Acceptable Not 3rd / 2011 10/19/11 E8096-278 Milk pCi/L Strontium-90 8.49E+00 1.47E+01 0.58 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Iodine-131 8.59E+01 8.92E+01 0.96 Acceptable 3rd / 2011 10/19111 E8097-278 Milk pCi/L Cerium-141 6.59E+01 6.67E+01 0.99 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Chromium-51 2.18E+02 2.26E+02 0.96 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Cesium-1 34 1.20E+02 1.28E+02 0.94 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Cesium-137 1.23E+02 1.14E+02 1.08 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Cobalt-58 9.08E+01 9.75E+01 0.93 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Manganese-54 1.57E+02 1.51 E+02 1.04 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Iron-59 5.30E+01 5.48E+01 0.97 Acceptable 3rd / 2011 10/19/11 E8097-278 Milk pCi/L Zinc-65 1.88E+02 1.80E+02 1.04 Acceptable 3rd 12011 10/19/11 E8097-278 Milk pCi/L Cobalt-60 1.51 E+02 1.57E+02 0.96 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Iodine-131 7.23E+01 8.01E+01 0.9 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Cerium-141 9.06E+01 9.15E+01 0.99 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Chromium-51 3.19E+02 3.10E+02 1.03 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Cesium-134 1.57E+02 1.76E+02 0.89 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Cesium-137 1.60E+02 1.56E+02 1.03 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Cobalt-58 1.34E+02 1.34E+02 1.00 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Manganese-54 2.19E+02 2.07E+02 1.06 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Iron-59 9.04E+01 7.52E+01 1.20 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Zinc-65 2.74E+02 2.47E+02 1.11 Acceptable 3rd / 2011 10/19/11 E8098-278 Water pCi/L Cobalt-60 2.25E+02 2.15E+02 1.04 Acceptable 4th / 2011 01/12/12 E8197-278 Cartridge pCi lodine-131 9.52E+01 9.82E+01 1.07 Acceptable 4th / 2011 01/12/12 E8198-278 Milk pCi/L Strontium-89 8.78E+01 8.96E+01 0.98 Acceptable 4th/2011 01/12/12 E8198-278 Milk pCi/L Strontium-90 1.51E+01 1.48E+01 1.02 Acceptable 4th / 2011 01/12/12 E8199-278 Milk pCi/L Iodine-131 9.36E+01 9.02E+01 1.04 Acceptable 4th / 2011 01/12/12 E8199-278 Milk pCi/L Chromium-51 5.53E+02 5.66E+02 0.98 Acceptable 4th / 2011 01/12/12 E8199-278 Milk pCi/L Cesium-134 1.59E+02 1.71 E+02 0.93 Acceptable 4th / 2011 01/12/12 E8199-278 Milk pCi/L Cesium-137 2.27E+02 2.10E+02 1.08 Acceptable 4th /2011 01/12/12 E8199-278 Milk pCi/L Cobalt-58 2.18E+02 2.21 E+02 0.99 Acceptable 4th / 2011 01/12/12 E8199-278 Milk pCi/L Manganese-54 2.52E+02 2.41E+02 1.05 Acceptable 4th/2011 01/12/12 E8199-278 Milk pCi/L Iron-59 1.90E+02 1.83E+02 1.04 Acceptable 4th/2011 01/12/12 E8199-278 Milk pCi/L Zinc-65 3.19E+02 2.91E+02 1.09 Acceptable 4th/2011 01/12/12 E8199-278 Milk pCi/L Cobalt-60 2.82E+02 2.70E+02 1.04 Acceptable 4th / 2011 01/12/12 E8200-278 Water pCi/L Iodine-131 8.44E+01 8.87E+01 0.95 Acceptable 4th / 2011 01/12/12 E8200-278 Water pCi/L Chromium-51 5.32E+02 5.66E+02 0.94 Acceptable 4th /2011 01/12/12 E8200-278 Water pCi/L Cesium-134 1.56E+02 1.71E+02 0.91 Acceptable 4th / 2011 01/12/12 E8200-278 Water pCi/L Cesium-137 2.06E+02 2.1OE+02 0.98 Acceptable 4th / 2011 01/12/12 E8200-278 Water pCi/L Cobalt-58 2.02E+02 2.21 E+02 0.92 Acceptable 4th / 2011 01/12/12 E8200-278 Water pCi/L Manganese-54 2.50E+02 2.41 E+02 1.04 Acceptable 4th / 2011 01/12/12 E8200-278 Water pCi/L Iron-59 1.81 E+02 1.83E+02 0.99 Acceptable 4th/2011 01/12/12 E8200-278 Water pCi/L Zinc-65 2.95E+02 2.91E+02 1.01 Acceptable 4th /2011 01/12/12 E8200-278 Water pCi/L Cobalt-60 2.58E+02 2.70E+02 0.96 Acceptable C-14

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 TABLE C-3 2011 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)

INTRA-LABORATORY DATA

SUMMARY

BIAS AND PRECISION BY MATRIX Laboratory Control Sample lDu!ibate!LCS Duplicate' MATRIX (LCS) Bias Criteria (+/- 25%) Precision Criteria (Note 1)

AND WITHIN OUTSIDE WITHIN OUTSIDE ANALYSIS CRITERIA CRITERIA CRITERIA CRITERIA Gamma Iodine-131 40 0 125 0 Gamma Spec Liquid with Ba, La 83 0 125 0 Gas Flow Sr 2nd Count 38 0 38 0 Gas Flow Total Strontium 26 0 26 0 Gamma Spec 24 0 24 0 Gamma Spec Solid with Ba, La 8 0 8 0 Gamma Spec Solid with Iodine 2 0 2 0 LSC Iron-55 4 0 4 0 LSC Nickel-63 4 0 4 0 Gas Flow Sr 2nd count 8 0 8 0 Gas Flow Total Strontium 7 0 7 0 Alpha Spec Am-241, Curium 9 0 9 0 Gamma Spec 72 0 72 0 Gamma Iodine-131 5 0 5 0 Gas Flow Sr 2nd Count 6 0 7 0 Gas Flow Strontium-90 7 0 7 0 Gas Flow Total Strontium 3 0 13 0 Direct Count-Gross Alpha/Beta 5 0 5 0 Gross Alpha/Beta 448 0 458 0 lUpIhiaSeUnm03 Alpha Spec Uranium 3 0 3 0 Alpha Spec Plutonium 3 0 3 0 Alpha Spec Am-241, Curium 5 0 5 0 Gamma Spec 32 0 32 0 Gamma Spec Liquid with Ba, La 100 0 136 0 Gamma Spec Liquid with Iodine 51 0 52 0 Gamma Iodine-131 22 0 36 0 LSC Tritium 231 0 227 0 LSC Iron-55 25 0 26 0 LSC Nickel-63 25 0 24 0 Gas Flow Sr 2nd count 26 0 25 0 Gas Flow Total Strontium 63 0 58 0 Gross Alpha/Beta 86 0 75 0 Gamma Spec 37 0 38 0 Gamma Spec Solid with Ba, La 7 0 7 0 C-1 5

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Laboratory control Sarnple DuplicateiLCS Dupiicate MATRIX (LCS) Bias Criteria (+/-25%) Precision Criteria (Note 1)

AND WITHIN OUTSIDE WITHIN OUTSIDE ANALYSIS CRITERIA CRITERIA CRITERIA CRITERIA Gamma Spec Solid with Iodine 17 0 19 0 LSC Nickel-63 7 0 7 0 Gas Flow Sr 2nd count 19 0 19 0 Gas Flow Total Strontium 12 0 12 0 V*,EG*E]T(AT.fIGI ________,,__ .___________ ..... _

Gamma Spec 3 0 3 0 Gamma Spec Solid with Iodine 83 0 82 0 Gas Flow Sr 2nd count 9 0 9 0 Gas Flow Total Strontium 4 0 4 0 Gamma Iodine-131 420 0 421 0 DRINKIN7GEWAýT-ER____

Gamma Iodine-131 27 0 40 0 Gamma Spec Liquid with Ba, La 73 0 72 0 LSC Tritium 28 0 28 0 LSC Iron-55 11 0 11 0 LSC Nickel 63 10 0 12 0 Gas Flow Sr 2nd count 11 0 13 0 Gas Flow Total Strontium 7 0 12 0 Gross Alpha/Beta 58 0 62 0 TOTAL: 2314 0 2520 0 Note 1: The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.

C-16

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Environmental TLDs Environmental dosimetry services for the reporting period of January - December, 2011 were provided by the Environmental Dosimetry Company (EDC), Sterling, Massachusetts. The TLD systems at the Environmental Dosimetry Company (EDC) are calibrated and operated to ensure consistent and accurate evaluation of TLDs. The quality of the dosimetric results reported to EDC clients is ensured by in-house performance testing and independent performance testing by EDC clients.

The purpose of the dosimetry quality assurance program is to provide performance documentation of the routine processing of EDC dosimeters. Performance testing provides a statistical measure of the bias and precision of dosimetry processing against a reliable standard, which in turn points out any trends or performance changes. Dosimetry quality control tests are performed on EDC Panasonic 814 Environmental dosimeters. These tests include: (1) the in-house testing program conducted by the EDC QA Officer and (2) independent test perform by EDC clients. In-house tests are performed using six pairs of 814 dosimeters, a pair is reported as an individual result and six pairs are reported as the mean result.

Excluded from this report are instrumentation checks. Although instrumentation checks represent an important aspect of the quality assurance program, they are not included as process checks in this report. Instrumentation checks represent between 5-10% of the TLDs processed.

Table C-4 provides a summary of individual dosimeter results evaluated against the EDC internal acceptance criteria for high-energy photons (Cs-137) only. The internal acceptance (tolerance) criteria for the Panasonic Environmental dosimeters are: +/- 15% for bias and +/- 12.8%

for precision. During this period, 100% (72/72) of the individual dosimeters, evaluated against these criteria met the tolerance limits for accuracy and 100% (72/72) met the criterion for precision.

Table C-5 provides the Bias + Standard deviation results for each group (N=6) of dosimeters evaluated against the internal tolerance criteria. Overall, 100% (12/12) of the dosimeter sets evaluated against the internal tolerance performance criteria met these criteria.

Table C-6 presents the independent blind spike results for irradiated dosimeters provided by client utilities during this annual period. All results passed the performance acceptance criterion.

TABLE C-4 PERCENTAGE OF INDIVIDUAL DOSIMETERS THAT PASSED EDC INTERNAL CRITERIA JANUARY- DECEMBER 2011(1),,(2)

_______________Nurti-be Pasess N ~ Pecfeisio "oSimelter Ty~ope Testte Panasonic Environmental 72 10010 (1)This table summarizes results of tests conducted by EDC.

(2)Environmental dosimeter results are free in air.

C-17

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 TABLE C-5 MEAN DOSIMETER ANALYSES (N=6)

JANUARY - DECEMBER 2011(1)' (2)

I I I

3.0 1.9

- I Pass 1 8.0 1.4 Pass 2011 0.2 1.4 Pass 11 6.2 0.6 Pass 11 5.4 0.6 Pass 08/16/2011 7.0 1.1 Pass 10/14/2011 -1.6 1.7 Pass 11/07/2011 0.4 0.8 Pass 01/19/2012 -1.0 1.3 Pass 01/22/2012 -3.1 1.8 Pass 01/29/2012 4.9 1.2 Pass 02/09/2012 -1.6 1.5 Pass (1)This table summarizes results of tests conducted by EDC for TLDs issued in 2011.

(2) Environmental dosimeter results are free in air.

TABLE C-6

SUMMARY

OF INDEPENDENT BLIND SPIKE DOSIMETER TESTING JANUARY - DECEMBER 2011(1), (2)

Y"uir.zu]] iviiiisione -1.6 L.U tass 2 nd Qtr.2011 Millstone -5.0 1.3 Pass 2 nd Qtr.2011 Seabrook 2.0 1.8 Pass 3rd Qtr. 2011 Millstone -2.1 2.9 Pass 4 t'h Qtr.201 1 Millstone 7.8 2.8 Pass 4 th Qtr.201 1 Seabrook 1.7 2.0 Pass (1) Performance criteria is +/- 30%.

(2) Blind spike irradiations using Cs-1 37 C-18

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Appendix D 2011 Data Summary D-I

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP NBF 270004001 1/5/2011 BETA 6.12E-02 2.36E-03 1.02E-03 AP SBN 270004002 1/5/2011 BETA 6.50E-02 2.44E-03 9.27E-04 AP DOW 270004003 1/5/2011 BETA 6.01E-02 2.37E-03 1.14E-03 AP COL 270004004 1/5/2011 BETA 5.47E-02 2.21E-03 1.00E-03 AP ONS-1 270004005 1/5/2011 BETA 6.18E-02 2.43E-03 1.1OE-03 AP ONS-2 270004006 1/5/2011 BETA 5.96E-02 2.35E-03 1.34E-03 AP ONS-3 270004007 1/5/2011 BETA 5.96E-02 2.26E-03 1.04E-03 AP ONS-4 270004008 1/5/2011 BETA 6.47E-02 2.44E-03 1.03E-03 AP ONS-5 270004009 1/5/2011 BETA 6.41E-02 2.45E-03 1.05E-03 AP ONS-6 270004010 1/5/2011 BETA 5.80E-02 2.30E-03 9.28E-04 AP NBF 270374001 1/12/2011 BETA 4.25E-02 1.98E-03 9.92E-04 AP SBN 270374002 1/12/2011 BETA 4.42E-02 1.98E-03 1.06E-03 AP DOW 270374003 1/12/2011 BETA 4.39E-02 2.OOE-03 1.04E-03 AP COL 270374004 1/12/2011 BETA 3.91E-02 1.90E-03 1.1OE-03 AP ONS-1 270374005 1/12/2011 BETA 4.45E-02 1.99E-03 1.04E-03 AP ONS-2 270374006 1/12/2011 BETA 4.34E-02 1.98E-03 8.81E-04 AP ONS-3 270374007 1/12/2011 BETA 4.25E-02 1.93E-03 1.06E-03 AP ONS-4 270374008 1/12/2011 BETA 3.87E-02 1.89E-03 1.00E-03 AP ONS-5 270374009 1/12/2011 BETA 4.10E-02 1.91E-03 1.07E-03 AP ONS-6 270374010 1/12/2011 BETA 4.54E-02 2.07E-03 1.08E-03 AP NBF 270795001 1/19/2011 BETA 4.87E-02 2.18E-03 1.22E-03 AP SBN 270795002 1/19/2011 BETA 5.15E-02 2.17E-03 1.06E-03 AP DOW 270795003 1/19/2011 BETA 5.27E-02 2.20E-03 1.14E-03 AP COL 270795004 1/19/2011 BETA 4.29E-02 1.99E-03 1.12E-03 AP ONS-1 270795005 1/19/2011 BETA 4.91E-02 2.16E-03 1.19E-03 AP ONS-2 270795006 1/19/2011 BETA 4.62E-02 2.08E-03 1.34E-03 AP ONS-3 270795007 1/19/2011 BETA 4.63E-02 2.02E-03 1.12E-03 AP ONS-4 270795008 1/19/2011 BETA 3.87E-02 1.80E-03 1.04E-03 AP ONS-5 270795009 1/19/2011 BETA 4.62E-02 2.02E-03 1.02E-03 AP ONS-6 270795010 1/19/2011 BETA 4.89E-02 2.14E-03 1.17E-03 AP NBF 271263001 1/26/2011 BETA 4.67E-02 2.1OE-03 1.28E-03 AP SBN 271263002 1/26/2011 BETA 5.08E-02 2.12E-03 9.53E-04 AP DOW 271263003 1/26/2011 BETA 4.15E-02 1.90E-03 9.83E-04 AP COL 271263004 1/26/2011 BETA 4.25E-02 1.98E-03 1.12E-03 AP ONS-1 271263005 1/26/2011 BETA 5.76E-02 2.31E-03 1.03E-03 AP ONS-2 271263006 1/26/2011 BETA 4.71E-02 2.10E-03 1.12E-03 AP ONS-3 271263007 1/26/2011 BETA 4.60E-02 2.01E-03 1.06E-03 AP ONS-4 271263008 1/26/2011 BETA 4.OOE-02 1.91E-03 1.03E-03 AP ONS-5 271263009 1/26/2011 BETA 4.58E-02 2.02E-03 1.21E-03 AP ONS-6 271263010 1/26/2011 BETA 4.53E-02 1.98E-03 9.33E-04 AP NBF 271781001 2/3/2011 BETA 4.02E-02 1.80E-03 1.18E-03 AP SBN 271781002 2/3/2011 BETA 4.78E-02 1.94E-03 8.82E-04 AP DOW 271781003 2/3/2011 BETA 3.96E-02 1.77E-03 9.10E-04 AP COL 271781004 2/3/2011 BETA 4.36E-02 1.88E-03 1.01E-03 AP ONS-1 271781005 2/3/2011 BETA 4.42E-02 1.89E-03 9.04E-04 AP ONS-2 271781006 2/3/2011 BETA 4.14E-02 1.85E-03 1.15E-03 AP ONS-3 271781007 2/3/2011 BETA 3.89E-02 1.74E-03 9.84E-04 AP ONS-4 271781008 2/3/2011 BETA 3.81E-02 1.85E-03 1.13E-03 AP ONS-5 271781009 2/3/2011 BETA 4.08E-02 1.79E-03 1.15E-03 AP ONS-6 271781010 2/3/2011 BETA 4.20E-02 1.78E-03 8.47E-04 AP NBF 272128001 2/9/2011 BETA 3.72E-02 1.99E-03 1.60E-03 D-2

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP SBN 272128002 2/9/2011 BETA 4.42E-02 2.16E-03 1.18E-03 AP DOW 272128003 2/9/2011 BETA 4.08E-02 2.1OE-03 1.69E-03 AP COL 272128004 2/9/2011 BETA 3.74E-02 2.02E-03 1.44E-03 AP ONS-1 272128005 2/9/2011 BETA 3.66E-02 2.OOE-03 1.65E-03 AP ONS-2 272128006 2/9/2011 BETA 3.99E-02 2.05E-03 1.19E-03 AP ONS-3 272128007 .2/9/2011 BETA 3.72E-02 1.98E-03 1.64E-03 AP ONS-4 272128008 2/9/2011 BETA 3.06E-02 1.80E-03 1.38E-03 AP ONS-5 272128009 2/9/2011 BETA 3.70E-02 1.98E-03 1.59E-03 AP ONS-6 272128010 2/9/2011 BETA 4.10E-02 2.06E-03 1.17E-03 AP NBF 272564001 2/16/2011 BETA 4.43E-02 1.97E-03 1.33E-03 AP SBN 272564002 2/16/2011 BETA 4.70E-02 2.07E-03 1.03E-03 AP DOW 272564003 2/16/2011 BETA 4.85E-02 2.12E-03 1.46E-03 AP COL 272564004 2/16/2011 BETA 4.20E-02 1.99E-03 1.24E-03 AP ONS-1 272564005 2/16/2011 BETA 4.69E-02 2.10E-03 1.43E-03 AP ONS-2 272564006 2/16/2011 BETA 4.29E-02 1.98E-03 1.03E-03 AP ONS-3 272564007 2/16/2011 BETA 4.82E-02 2.07E-03 1.40E-03 AP ONS-4 272564008 2/16/2011 BETA 3.93E-02 1.90E-03 1.21E-03 AP ONS-5 272564009 2/16/2011 BETA 4.44E-02 2.03E-03 1.29E-03 AP ONS-6 272564010 2/16/2011 BETA 4.49E-02 2.02E-03 1.37E-03 AP NBF 277493001 3/30/2011 Ac-228 4.73E-04 6.53E-04 2.42E-03 U AP NBF 277493001 3/30/2011 Ag-108m -1.25E-04 1.27E-04 3.97E-04 U AP NBF 277493001 3/30/2011 Ag-110m -3.56E-04 2.37E-04 6.66E-04 U AP NBF 277493001 3/30/2011 Ba- 140 -1.97E-02 2.83E-02 8.48E-02 U AP NBF 277493001 3/30/2011 Be-7 1.16E-01 1.02E-02 1.20E-02 AP NBF 277493001 3/30/2011 Ce- 141 2.35E-03 1.20E-03 3.40E-03 U AP NBF 277493001 3/30/2011 Ce- 144 3.69E-05 6.36E-04 2.17E-03 U AP NBF 277493001 3/30/2011 Co-57 -1.59E-04 8.81E-05 2.34E-04 U AP NBF 277493001 3/30/2011 Co-58 -1.41E-04 3.83E-04 1.25E-03 U AP NBF 277493001 3/30/2011 Co-60 -1.90E-05 1.67E-04 5.48E-04 U AP NBF 277493001 3/30/2011 Cr-51 1.57E-03 1.O1E-02 3.28E-02 U AP NBF 277493001 3/30/2011 Cs-134 5.86E-04 2.66E-04 8.39E-04 U AP NBF 277493001 3/30/2011 Cs-137 4.07E-04 2.16E-04 6.77E-04 U AP NBF 277493001 3/30/2011 Fe-59 -2.74E-04 1.29E-03 4.13E-03 U AP NBF 277493001 3/30/2011 1-131 5.41E-01 3.96E-01 0.OOE+00 UI AP. NBF 277493001 3/30/2011 K-40 3.50E-03 1.98E-03 6.67E-03 U AP NBF 277493001 3/30/2011 La-140 -1.97E-02 2.83E-02 8.48E-02 U AP NBF 277493001 3/30/2011 Mn-54 -1.56E-04 1.80E-04 5.56E-04 U AP NBF 277493001 3/30/2011 Nb-95 2.05E-04 3.97E-04 1.35E-03 U AP NBF 277493001 3/30/2011 Ru-I103 9.30E-04 7.01E-04 2.32E-03 U AP NBF 277493001 3/30/2011 Ru-I106 -1. 12E-03 1.62E-03 5.01E-03 U AP NBF 277493001 3/30/2011 Sb-124 4.35E-04 1.07E-03 3.57E-03 U AP NBF 277493001 3/30/2011 Sb-125 -2.42E-05 3.77E-04 1.26E-03 U AP NBF 277493001 3/30/2011 Se-75 3.08E-04 2.66E-04 8.65E-04 U AP NBF 277493001 3/30/2011 Th-228 1.44E-04 2.24E-04 7.34E-04 U AP NBF 277493001 3/30/2011 Zn-65 2.22E-04 4.65E-04 1.54E-03 U AP NBF 277493001 3/30/2011 Zr-95 7.64E-04 7.16E-04 2.44E-03 U AP SBN 277493002 3/30/2011 Ac-228 2.23E-04 3.03E-04 1.06E-03 U AP SBN 277493002 3/30/2011 Ag- 108m 5.85E-05 6.37E-05 2.16E-04 U AP SBN 277493002 3/30/2011 Ag-I 10m 4.01E-06 1.12E-04 3.14E-04 U AP SBN 277493002 3/30/2011 Ba- 140 1.83E-02 1.91E-02 6.67E-02 U AP SBN 277493002 3/30/2011 Be-7 1.14E-01 8.26E-03 6.03E-03 D-3

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP SBN 277493002 3/30/2011 Ce- 141 7.90E-04 6.23E-04 2.01E-03 U AP SBN 277493002 3/30/2011 Ce- 144 4.03E-04 4.19E-04 1.37E-03 U AP SBN 277493002 3/30/2011 Co-57 -3.82E-05 5.57E-05 1.73E-04 U AP SBN 277493002 3/30/2011 Co-58 -1.25E-04 1.67E-04 5.18E-04 U AP SBN 277493002 3/30/2011 Co-60 -3.13E-06 9.14E-05 2.99E-04 U AP SBN 277493002 3/30/2011 Cr-51 -5.74E-03 5.94E-03 1.85E-02 U AP SBN 277493002 3/30/2011 Cs-134 4.30E-04 1.65E-04 5.13E-04 U AP SBN 277493002 3/30/2011 Cs-137 5.14E-04 1.38E-04 2.70E-04 U' M AP SBN 277493002 3/30/2011 Fe-59 -3.09E-04 7.05E-04 2.23E-03 U AP SBN 277493002 3/30/2011 1-131 3.44E-01 2.37E-01 0.OOE+00 UI AP SBN 277493002 3/30/2011 K-40 6.61E-03 1.49E-03 3.29E-03 AP SBN 277493002 3/30/2011 La-140 1.83E-02 1.91E-02 6.67E-02 U AP SBN 277493002 3/30/2011 Mn-54 -6.OOE-05 9.59E-05 3.03E-04 U AP SBN 277493002 3/30/2011 Nb-95 -2.11 E-04 2.02E-04 5.71E-04 U AP SBN 277493002 3/30/2011 Ru- 103 -8.09E-05 3.24E-04 1.04E-03 U AP SBN 277493002 3/30/2011 Ru-106 1.07E-03 8.50E-04 2.87E-03 U AP SBN 277493002 3/30/2011 Sb- 124 -4.14E-04 6.22E-04 1.81E-03 U AP SBN 277493002 3/30/2011 Sb-125 -5.05E-04 2.27E-04 5.38E-04 U AP SBN 277493002 3/30/2011 Se-75 -1.05E-04 1.43E-04 4.58E-04 U AP SBN 277493002 3/30/2011 Th-228 -8.21E-05 1.25E-04 3.98E-04 U AP SBN 277493002 3/30/2011 Zn-65 -6.82E-05 2.52E-04 8.13E-04 U AP SBN 277493002 3/30/2011 Zr-95 1.40E-04 3.58E-04 1.19E-03 U AP DOW 277493003 3/30/2011 Ac-228 1.71E-04 3.59E-04 1.17E-03 U AP DOW 277493003 3/30/2011 Ag-108m 8.83E-05 6.69E-05 2.24E-04 U AP DOW 277493003 3/30/2011 Ag-il0m -1.81E-04 1.07E-04 2.99E-04 U AP DOW 277493003 3/30/2011 Ba-140 2.90E-03 1.38E-02 4.63E-02 U AP DOW 277493003 3/30/2011 Be-7 9.94E-02 6.99E-03 5.64E-03 AP DOW 277493003 3/30/2011 Ce-141 -2.33E-04 6.44E-04 2.02E-03 U AP DOW 277493003 3/30/2011 Ce-144 3.13E-04 4.48E-04 1.46E-03 U AP DOW 277493003 3/30/2011 Co-57 5.37E-05 5.83E-05 1.91E-04 U AP DOW 277493003 3/30/2011 Co-58 -4.05E-04 2.11E-04 5.30E-04 U AP DOW 277493003 3/30/2011 Co-60 -7.99E-05 9.72E-05 2.87E-04 U AP DOW 277493003 3/30/2011 Cr-51 -1.03E-03 5.84E-03 1.87E-02 U AP DOW 277493003 3/30/2011 Cs-134 2.71E-04 1.33E-04 4.28E-04 U AP DOW 277493003 3/30/2011 Cs-137 2.06E-04 9.87E-05 3.18E-04 U AP DOW 277493003 3/30/2011 Fe-59 2.52E-04 6.21E-04 2. 1OE-03 U AP DOW 277493003 3/30/2011 1-131 2.61E-01 2.26E-01 0.OOE+00 UI AP DOW 277493003 3/30/2011 K-40 3.15E-03, 1.47E-03 2.92E-03 U' AP DOW 277493003 3/30/2011 La-140 2.90E-03 1.38E-02 4.63E-02 U AP DOW 277493003 3/30/2011 Mn-54 2.91E-05 1.14E-04 3.78E-04 U AP DOW 277493003 3/30/2011 Nb-95 -5.68E-05 2.17E-04 7.04E-04 U AP DOW 277493003 3/30/2011 Ru-103 -1.27E-05 3.16E-04 1.03E-03 U AP DOW 277493003 3/30/2011 Ru-106 3.22E-04 7.55E-04 2.58E-03 U AP DOW 277493003 3/30/2011 Sb-124 -7.35E-04 5.08E-04 1.26E-03 U AP DOW 277493003 3/30/2011 Sb-125 3.72E-04 2.16E-04 7.11 E-04 U AP DOW 277493003 3/30/2011 Se-75 -8.50E-05 1.42E-04 4.49E-04 U AP DOW 277493003 3/30/2011 Th-228 1.14E-04 1.70E-04 4.84E-04 U AP DOW 277493003 3/30/2011 Zn-65 -2.34E-04 2.59E-04 7.88E-04 U AP DOW 277493003 3/30/2011 Zr-95 4.37E-04 3.58E-04 1.22E-03 U AP COL 277493004 3/30/2011 Ac-228 -2.62E-04 3.64E-04 1.14E-03 U AP COL 277493004 3/30/2011 Ag-108m 1.06E-04 6.77E-05 2.29E-04 U D-4

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi~m3) (pCi/m3) (pCi/m3)

AP COL 277493004 3/30/2011 Ag-1 10m -9.82E-05 9.41E-05 2.68E-04 U AP COL 277493004 3/30/2011 Ba- 140 1.95E-02 1.69E-02 6.12E-02 U AP COL 277493004 3/30/2011 Be-7 9.28E-02 7.45E-03 5.91E-03 AP COL 277493004 3/30/2011 Ce-141 4.I1E-04 5.55E-04 1.87E-03 U AP COL 277493004 3/30/2011 Ce-144 -4.14E-04 3.74E-04 1.14E-03 U AP COL 277493004 3/30/2011 Co-57 -2.97E-05 4.79E-05 1.55E-04 U AP COL 277493004 3/30/2011 Co-58 2.47E-04 2.OOE-04 7.01E-04 U AP COL 277493004 3/30/2011 Co-60 1.36E-05 8.48E-05 2.78E-04 U AP COL 277493004 3/30/2011 Cr-51 4.40E-03 5.OOE-03 1.74E-02 U AP COL 277493004 3/30/2011 Cs-134 2.92E-05 9.15E-05 3.15E-04 U AP COL 277493004 3/30/2011 Cs-137 3.30E-05 8.92E-05 2.94E-04 U AP COL 277493004 3/30/2011 Fe-59 3.77E-04 6.71E-04 2.29E-03 U AP COL 277493004 3/30/2011 1-131 8.21E-02 1.97E-01 0.OOE+00 UI AP COL 277493004 3/30/2011 K-40 7.47E-04 1.65E-03 3.06E-03 U AP COL 277493004 3/30/2011 La- 140 1.95E-02 1.69E-02 6.12E-02 U AP COL 277493004 3/30/2011 Mn-54 -7.18E-05 9.17E-05 2.82E-04 U AP COL 277493004 3/30/2011 Nb-95 1.91E-04 2.09E-04 7.31E-04 U AP COL 277493004 3/30/2011 Ru-103 -4.64E-05 3.28E-04 1.07E-03 U AP COL 277493004 3/30/2011 Ru-106 2.68E-04 8.36E-04 2.77E-03 U AP COL 277493004 3/30/2011 Sb-124 -7.84E-04 5.25E-04 1.17E-03 U AP COL 277493004 3/30/2011 Sb-125 -6.21E-05 1.77E-04 5.74E-04 U AP COL 277493004 3/30/2011 Se-75 -7.18E-05 1.35E-04 4.18E-04 U AP COL 277493004 3/30/2011 Th-228 -9.52E-05 1.32E-04 4.31E-04 U AP COL 277493004 3/30/2011 Zn-65 -4.58E-05 2.12E-04 6.77E-04 U AP COL 277493004 3/30/2011 Zr-95 -8.53E-04 3.92E-04 8.83E-04 U AP ONS-1 277493005 3/30/2011 Ac-228 3.75E-04 3.52E-04 1.21E-03 U AP ONS-1 277493005 3/30/2011 Ag-108m -1.81E-05 5.94E-05 1.88E-04 U AP ONS-1 277493005 3/30/2011 Ag-Il0m -3.99E-04 1.40E-04 2.57E-04 U AP ONS-1 277493005 3/30/2011 Ba- 140 -1.36E-02 1.47E-02 4.14E-02 U AP ONS-1 277493005 3/30/2011 Be-7 8.33E-02 6.30E-03 5.77E-03 AP ONS-1 277493005 3/30/2011 Ce-I141 1.23E-03 6.19E-04 2.OOE-03 U AP ONS-1 277493005 3/30/2011 Ce-I144 1.71E-05 3.66E-04 1.24E-03 U AP ONS-1 277493005 3/30/2011 Co-57 1.92E-05 4.92E-05 1.68E-04 U AP ONS-1 277493005 3/30/2011 Co-58 -1.84E-04 1.75E-04 5.07E-04 U AP ONS-1 277493005 3/30/2011 Co-60 -8.01E-06 9.80E-05 3.13E-04 U AP ONS-1 277493005 3/30/2011 Cr-51 -3.09E-03 5.12E-03 1.61E-02 U AP ONS-I 277493005 3/30/2011 Cs-134 1.51E-04 1.17E-04 4.03E-04 U AP ONS-I 277493005 3/30/2011 Cs-137 1.65E-04 1.O1E-04 3.43E-04 U AP ONS-I 277493005 3/30/2011 Fe-59 -7.04E-04 6.3 1E-04 1.72E-03 U AP ONS-I 277493005 3/30/2011 1-131 1.73E-01 2.30E-01 0.OOE+00 UI AP ONS-1 277493005 3/30/2011 K-40 -7.94E-05 1.09E-03 3.97E-03 U AP ONS-I 277493005 3/30/2011 La-140 -1.36E-02 1.47E-02 4.14E-02 U AP ONS-1 277493005 3/30/2011 Mn-54 -1.57E-05 9.01E-05 2.94E-04 U AP ONS-1 277493005 3/30/2011 Nb-95 -2.67E-06 1.80E-04 5.98E-04 U AP ONS-1 277493005 3/30/2011 Ru-103 -3.65E-04 3.62E-04 1.05E-03 U AP ONS-1 277493005 3/30/2011 Ru-106 -8.26E-04 8.54E-04 2.62E-03 U AP ONS-1 277493005 3/30/2011 Sb-124 6.71E-05 4.19E-04 1.43E-03 U AP ONS-1 277493005 3/30/2011 Sb-125 -1.71E-04 2.11E-04 6.36E-04 U AP ONS-1 277493005 3/30/2011 Se-75 6.78E-05 1.37E-04 4.61E-04 U AP ONS-1 277493005 3/30/2011 Th-228 2.94E-04 1.50E-04 4.25E-04 U AP ONS-1 277493005 3/30/2011 4.88E-05 Zn-65 1.71E-04 5.77E-04 U D-5

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-1 277493005 3/30/2011 Zr-95 2.83E-04 3.21E-04 1.12E-03 U AP ONS-2 277493006 3/30/2011 Ac-228 7.07E-06 4.50E-04 1.53E-03 U AP ONS-2 277493006 3/30/2011 Ag-108m 5.37E-07 7.37E-05 2.38E-04 U AP ONS-2 277493006 3/30/2011 Ag-I l0m -3.42E-04 1.43E-04 3.33E-04 U AP ONS-2 277493006 3/30/2011 Ba- 140 3.37E-04 2.08E-02 6.84E-02 U AP ONS-2 277493006 3/30/2011 Be-7 1.00E-01 7.60E-03 7.25E-03 AP ONS-2 277493006 3/30/2011 Ce- 141 1.77E-03 8.43E-04 2.62E-03 U AP ONS-2 277493006 3/30/2011 Ce- 144 8.78E-04 5.40E-04 1.76E-03 U AP ONS-2 277493006 3/30/2011 Co-57 -4.29E-05 7.12E-05 2.19E-04 U AP ONS-2 277493006 3/30/2011 Co-58 1.26E-04 2.20E-04 7.41E-04 U AP ONS-2 277493006 3/30/2011 Co-60 -3.75E-05 1.07E-04 3.38E-04 U AP ONS-2 277493006 3/30/2011 Cr-51 3.87E-03 6.97E-03 2.34E-02 U AP ONS-2 277493006 3/30/2011 Cs-134 3.86E-05 1.28E-04 4.3 1E-04 U AP ONS-2 277493006 3/30/2011 Csý137 2.96E-04 1.24E-04 3.73E-04 U AP ONS-2 277493006 3/30/2011 Fe-59 -2.68E-04 7.07E-04 2.28E-03 U AP ONS-2 277493006 3/30/2011 1-131 4.25E-01 2.84E-01 0.OOE+00 UI AP ONS-2 277493006 3/30/2011 K-40 -1.74E-03 1.61E-03 5.08E-03 U AP ONS-2 277493006 3/30/2011 La-140 3.37E-04 2.08E-02 6.84E-02 U AP ONS-2 277493006 3/30/2011 Mn-54 -1.39E-04 1.16E-04 3.44E-04 U AP ONS-2 277493006 3/30/2011 Nb-95 -1.41E-04 2.52E-04 8. 1OE-04 U AP ONS-2 277493006 3/30/2011 Ru-103 6.06E-06 3.85E-04 1.29E-03 U AP ONS-2 277493006 3/30/2011 Ru-106 2.04E-04 9.82E-04 3.24E-03 U AP ONS-2 277493006 3/30/2011 Sb-124 -6.13E-04 6.70E-04 1.98E-03 U AP ONS-2 277493006 3/30/2011 Sb-125 -3.08E-05 2.40E-04 7.73E-04 U AP ONS-2 277493006 3/30/2011 Se-75 -2.88E-04 2.05E-04 5.90E-04 U AP ONS-2 277493006 3/30/2011 Th-228 -2.25E-05 1.64E-04 5.29E-04 U AP ONS-2 277493006 3/30/2011 Zn-65 1.47E-04 2.85E-04 9.65E-04 U AP ONS-2 277493006 3/30/2011 Zr-95 -3.78E-04 4.51E-04 1.42E-03 U AP ONS-3 277493007 3/30/2011 Ac-228 2.01E-04 3.14E-04 1.06E-03 U AP ONS-3 277493007 3/30/2011 Ag-108m 1.27E-04 7.64E-05 2.50E-04 U AP ONS-3 277493007 3/30/2011 Ag-I l0m -9.29E-06 9.77E-05 2.79E-04 U AP ONS-3 277493007 3/30/2011 Ba- 140 9.79E-03 1.95E-02 6.63E-02 U AP ONS-3 277493007 3/30/2011 Be-7 9.74E-02 7.54E-03 5.38E-03 AP ONS-3 277493007 3/30/2011 Ce- 141 9.33E-05 5.70E-04 1.84E-03 U AP 0NS-3 277493007 3/30/2011 Ce- 144 1.39E-03 5.48E-04 1.56E-03 U AP ONS-3 277493007 3/30/2011 Co-57 -2.68E-05 5.23E-05 1.64E-04 U AP ONS-3 277493007 3/30/2011 Co-58 -2.14E-06 1.97E-04 6.44E-04 U AP ONS-3 277493007 3/30/2011 Co-60 6.OOE-05 9.39E-05 3.28E-04 U AP ONS-3 277493007 3/30/2011 Cr-51 4.50E-03 5.96E-03 2.OOE-02 U AP ONS-3 277493007 3/30/2011 Cs-134 2.68E-04 1.35E-04 4.44E-04 U AP ONS-3 277493007 3/30/2011 Cs-137 2.87E-04 1.16E-04 3.67E-04 U AP ONS-3 277493007 3/30/2011 Fe-59 8.14E-04 8.19E-04 2.86E-03 U AP ONS-3 277493007 3/30/2011 1-131 5.11E-01 2.43E-01 0.OOE+00 UI AP ONS-3 277493007 3/30/2011 K-40 3.25E-04 1.31E-03 4.80E-03 U AP ONS-3 277493007 3/30/2011 .La-140 9.79E-03 1.95E-02 6.63E-02 U AP ONS-3 277493007 3/30/2011 Mn-54 5.83E-05 9.79E-05 3.32E-04 U AP ONS-3 277493007 3/30/2011 Nb-95 3.OOE-05 2.15E-04 7.12E-04 U AP ONS-3 277493007 3/30/2011 Ru-103 -6.66E-04 4.71 E-04 1.29E-03 U AP ONS-3 277493007 3/30/2011 Ru-106 -2.OOE-04 8.82E-04 2.90E-03 U AP ONS-3 277493007 3/30/2011 Sb-124 5.11E-04 6.30E-04 2.26E-03 U AP ONS-3 277493007 3/30/2011 Sb-125 3.20E-04 2.15E-04 7.16E-04 U D-6

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-3 277493007 3/30/2011 Se-75 -3.72E-05 1.50E-04 4.95E-04 U AP ONS-3 277493007 3/30/2011 Th-228 -1.02E-04 1.40E-04 4.55E-04 U AP ONS-3 277493007 3/30/2011 Zn-65 -2.57E-04 2.50E-04 7.30E-04 U AP ONS-3 277493007 3/30/2011 Zr-95 4.52E-04 3.87E-04 1.34E-03 U AP ONS-4 277493008 3/30/2011 Ac-228 9.35E-04 4.49E-04 1.57E-03 U AP ONS-4 277493008 3/30/2011 Ag-108m 3.08E-05 8.39E-05 2.75E-04 U AP ONS-4 277493008 3/30/2011 Ag- l10m -2.07E-04 1.40E-04 3.89E-04 U AP ONS-4 277493008 3/30/2011 Ba-140 1.22E-02 1.97E-02 6.99E-02 U AP ONS-4 277493008 3/30/2011 Be-7 8.73E-02 7.48E-03 8.34E-03 AP ONS-4 277493008 3/30/2011 Ce- 141 -5.94E-04 7.35E-04 2.23E-03 U AP ONS-4 277493008 3/30/2011 Ce-I144 -1.58E-04 5.09E-04 1.61E-03 U AP ONS-4 277493008 3/30/2011 Co-57 4.21E-05 6.25E-05 2.05E-04 U AP ONS-4 277493008 3/30/2011 Co-58 -4.83E-05 1.77E-04 5.57E-04 U AP ONS-4 277493008 3/30/2011 Co-60 6.33E-05 1.01E-04 3.55E-04 U AP ONS-4 277493008 3/30/2011 Cr-51 1.111E-02 7.44E-03 2.46E-02 U AP ONS-4 277493008 3/30/2011 Cs-134 -5.43E-05 1.12E-04 3.47E-04 U AP ONS-4 277493008 3/30/2011 Cs-137 1.45E-04 1.111E-04 3.80E-04 U AP ONS-4 277493008 3/30/2011 Fe-59 -5.92E-04 7.92E-04 2.39E-03 U AP ONS-4 277493008 3/30/2011 1-131 2.00E-01 2.70E-01 0.00E+00 UI AP ONS-4 277493008 3/30/2011 K-40 3.58E-03 1.87E-03 6.27E-03 U AP ONS-4 277493008 3/30/2011 La-140 1.22E-02 1.97E-02 6.99E-02 U AP ONS-4 277493008 3/30/2011 Mn-54 -6.44E-05 1.21E-04 3.70E-04 U AP ONS-4 277493008 3/30/2011 Nb-95 -8.61E-05 2.37E-04 7.50E-04 U AP ONS-4 277493008 3/30/2011 Ru-I103 5.02E-04 4.23E-04 1.46E-03 U AP ONS-4 277493008 3/30/2011 Ru-106 1.46E-04 9.46E-04 3.18E-03 U AP ONS-4 277493008 3/30/2011 Sb-124 4.08E-05 5.82E-04 1.96E-03 U AP ONS-4 277493008 3/30/2011 Sb-125 1.69E-04 2.49E-04 8.25E-04 U AP ONS-4 277493008 3/30/2011 Se-75 5.911E-05 1.69E-04 5.68E-04 U AP ONS-4 277493008 3/30/2011 Th-228 1.43E-05 1.64E-04 5.35E-04 U AP ONS-4 277493008 3/30/2011 Zn-65 -5.88E-04 3.05E-04 6.90E-04 U AP ONS-4 277493008 3/30/2011 Zr-95 -3.17E-04 4.33E-04 1.31E-03 U AP ONS-5 277493009 3/30/2011 Ac-228 -9.111E-05 4.20E-04 1.35E-03 U AP ONS-5 277493009 3/30/2011 Ag-108m -6.39E-06 7.59E-05 2.46E-04 U AP ONS-5 277493009 3/30/2011 Ag-Il0m -9.84E-05 1.25E-04 3.88E-04 U AP ONS-5 277493009 3/30/2011 Ba- 140 -1.66E-03 2.06E-02 6.81E-02 U AP ONS-5 277493009 3/30/2011 Be-7 1.07E-01 8.09E-03 6.94E-03 AP ONS-5 277493009 3/30/2011 Ce-I141 2.07E-04 6.3 11E-04 2.09E-03 U AP ONS-5 277493009 3/30/2011 Ce-144 -2.39E-04 4.63E-04 1.48E-03 U AP ONS-5 277493009 3/30/2011 Co-57 4.25E-05 6.12E-05 2.05E-04 U AP ONS-5 277493009 3/30/2011 Co-58 -3.91E-04 2.77E-04 7.62E-04 U AP ONS-5 277493009 3/30/2011 Co-60 1.93E-04 1.17E-04 4.19E-04 U AP ONS-5 277493009 3/30/2011 Cr-51 -2.54E-03 6.32E-03 2.06E-02 U AP ONS-5 277493009 3/30/2011 Cs-134 1.75E-04 1.44E-04 4.90E-04 U AP ONS-5 277493009 3/30/2011 Cs-137 1.89E-04 1.18E-04 3.97E-04 U AP ONS-5 277493009 3/30/2011 Fe-59 -1.42E-04 7.52E-04 2.45E-03 U AP ONS-5 277493009 3/30/2011 1-131 -2.92E-02 2.84E-01 0.00E+00 U AP ONS-5 277493009 3/30/2011 K-40 -1.41E-03 1.64E-03 5.72E-03 U-AP ONS-5 277493009" 3/30/2011 La-140 -1.66E-03 2.06E-02 6.81E-02 U AP ONS-5 277493009 3/30/2011 Mn-54 7.96E-05 1.15E-04 3.90E-04 U AP ONS-5 277493009 3/30/2011 Nb-95 6.32E-05 2.43E-04 8.12E-04 U AP ONS-5 277493009 3/30/2011 Ru-103 1.97E-04 4.19E-04 1.38E-03 U D-7

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-5 277493009 3/30/2011 Ru-106 1.84E-04 1.09E-03 3.66E-03 U AP ONS-5 277493009 3/30/2011 Sb-124 6.64E-04 6.96E-04 2.51E-03 U AP ONS-5 277493009 3/30/2011 Sb-125 -1.01E-04 2.54E-04 8.05E-04 U AP ONS-5 277493009 3/30/2011 Se-75 -3.26E-05 1.70E-04 5.68E-04 U AP ONS-5 277493009 3/30/2011 Th-228 3.89E-04 2.70E-04 5.37E-04 U AP ONS-5 277493009 3/30/2011 Zn-65 -7.06E-04 3.57E-04 8.54E-04 U AP ONS-5 277493009 3/30/2011 Zr-95 4.93E-04 4.34E-04 1.49E-03 U AP ONS-6 277493010 3/30/2011 Ac-228 -9.59E-04 4.75E-04 1.22E-03 U AP ONS-6 277493010 3/30/2011 Ag-108m 1.04E-04 7.61E-05 2.57E-04 U AP ONS-6 277493010 3/30/2011 Ag-110m -2.77E-04 1.35E-04 3.3 1E-04 U AP ONS-6 277493010 3/30/2011 Ba-140 -1.24E-02 1.94E-02 6.02E-02 U AP ONS-6 277493010 3/30/2011 Be-7 1.14E-01 8.OOE-03 7.28E-03 AP ONS-6 277493010 3/30/2011 Ce- 141 -1.01E-03 6.70E-04 1.97E-03 U AP ONS-6 277493010 3/30/2011 Ce-144 -1.08E-04 4.38E-04 1.45E-03 U AP ONS-6 277493010 3/30/2011 Co-57 1.02E-04 5.88E-05 1.92E-04 U AP ONS-6 277493010 3/30/2011 Co-58 -4.09E-04 2.08E-04 4.67E-04 U AP ONS-6 277493010 3/30/2011 Co-60 2.13E-04 1.25E-04 4.29E-04 U AP ONS-6 277493010 3/30/2011 Cr-5I -5.06E-03 6.64E-03 2.03E-02 U AP ONS-6 277493010 3/30/2011 Cs-134 3.29E-04 1.55E-04 4.97E-04 U AP ONS-6 277493010 3/30/2011 Cs-137 2.55E-04 1.20E-04 3.82E-04 U AP ONS-6 277493010 3/30/2011 Fe-59 -4.22E-04 6.36E-04 1.94E-03 U AP ONS-6 277493010 3/30/2011 1-131 4.41E-01 2.67E-01 0.OOE+00 UI AP ONS-6 277493010 3/30/2011 K-40 5.35E-04 1.28E-03 4.84E-03 U AP ONS-6 277493010 3/30/2011 La-140 -1.24E-02 1.94E-02 6.02E-02 U AP ONS-6 277493010 3/30/2011 Mn-54 5.13E-05 1.08E-04 3.73E-04 U AP ONS-6 277493010 3/30/2011 Nb-95 6.17E-05 2.33E-04 7.66E-04 U AP ONS-6 277493010 3/30/2011 Ru-103 2.81 E-04 4.39E-04 1.48E-03 U AP ONS-6 277493010 3/30/2011 Ru-106 -9.97E-04 9.17E-04 2.70E-03 U AP ONS-6 277493010 3/30/2011 Sb-124 4.82E-04 7.05E-04 2.47E-03 U AP ONS-6 277493010 3/30/2011 Sb-125 -2.60E-04 2.37E-04 7.27E-04 U AP ONS-6 277493010 3/30/2011 Se-75 7.57E-05 1.60E-04 5.28E-04 U AP ONS-6 277493010 3/30/2011 Th-228 -2.09E-04 1.74E-04 5.31E-04 U AP ONS-6 277493010 3/30/2011 Zn-65 -3.60E-04 2.42E-04 6.32E-04 U AP ONS-6 277493010 3/30/2011 Zr-95 7.82E-04 4.64E-04 1.54E-03 U AP NBF 272944001 2/23/2011 BETA 2.98E-02 1.68E-03 1.42E-03 AP SBN 272944002 2/23/2011 BETA 3.41E-02 1.79E-03 1.17E-03 AP DOW 272944003 2/23/2011 BETA 3.14E-02 1.74E-03 1.52E-03 AP COL 272944004 2/23/2011 BETA 3.74E-02 1.89E-03 1.53E-03 AP ONS-1 272944005 2/23/2011 BETA 3.35E-02 1.78E-03 1.28E-03 AP ONS-2 272944006 2/23/2011 BETA 3.76E-02 1.87E-03 1.36E-03 AP ONS-3 272944007 2/23/2011 BETA 3.67E-02 1.88E-03 1.11E-03 AP ONS-4 272944008 2/23/2011 BETA 2.89E-02 1.60E-03 1.34E-03 AP ONS-5 272944009 2/23/2011 BETA 3.38E-02 1.73E-03 1.1OE-03 AP ONS-6 272944010 2/23/2011 BETA 3.81E-02 1.91E-03 1.53E-03 AP NBF 273401001 3/2/2011 BETA 4.71E-02 2.03E-03 1.01E-03 AP SBN 273401002 3/2/2011 BETA 5.08E-02 2.17E-03 1.41E-03 AP DOW 273401003 3/2/2011 BETA 4.45E-02 2.OOE-03 1.12E-03 AP COL 273401004 3/2/2011 BETA 4.87E-02 2.11E-03 1.48E-03 AP ONS-1 273401005 3/2/2011 BETA 5.21E-02 2.22E-03 1.52E-03 AP ONS-2 273401006 3/2/2011 BETA 4.94E-02 2.15E-03 1.27E-03 AP ONS-3 273401007 3/2/2011 BETA 4.37E-02 2. 1OE-03 1.48E-03 D-8

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE . STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-4 273401008 3/2/2011 BETA 3.96E-02 1.86E-03 1.01E-03 AP ONS-5 273401009 3/2/2011 BETA 4.60E-02 2.04E-03 1.37E-03 AP ONS-6 273401010 3/2/2011 BETA 5.20E-02 2.21E-03 1.16E-03 AP NBF 273839001 3/9/2011 BETA 2.66E-02 1.57E-03 1.46E-03 AP SBN 273839002 3/9/2011 BETA 3.40E-02 1.81E-03 1.53E-03 AP DOW 273839003 3/9/2011 BETA 2.97E 1.66E-03 1.25E-03 AP COL 273839004 3/9/2011 BETA 3.19E-02 1.73E-03 1.37E-03 AP ONS-1 273839005 3/9/2011 BETA 3.36E-02 1.73E-03 1.03E-03 AP ONS-2 273839006 3/9/2011 BETA 3.05E-02 1.69E-03 1.41E-03 AP ONS-3 273839007 3/9/2011 BETA 3.56E-02 1.86E-03 1.21E-03 AP ONS-4 273839008 3/9/2011 BETA 2.85E-02 1.66E-03 1.54E-03 AP ONS-5 273839009 3/9/2011 BETA 3.16E-02 1.71E-03 1.47E-03 AP ONS-6 273839010 3/9/2011 BETA 3.14E-02 1.72E-03 1.27E-03 AP NBF 274196001 3/16/2011 BETA 3.68E-02 1.81E-03 1.30E-03 AP SBN 274196002 3/16/2011 BETA 4.33E-02 1.93E-03 1.08E-03 AP DOW 274196003 3/16/2011 BETA 3.43E-02 1.74E-03 1.21E-03 AP COL 274196004 3/16/2011 BETA 3.60E-02 1.86E-03 1.57E-03 AP ONS-1 274196005 3/16/2011 BETA 3.56E-02 1.84E-03 1.25E-03 AP ONS-2 274196006 3/16/2011 BETA 3.60E-02 1.77E-03 1.27E-03 AP ONS-3 274196007 3/16/2011 BETA 3.38E-02 1.65E-03 1.01E-03 AP ONS-4 274196008 3/16/2011 BETA 3.32E-02 1.77E-03 1.46E-03 AP ONS-5 274196009 3/16/2011 BETA 3.30E-02 1.73E-03 1.24E-03 AP ONS-6 274196010 3/16/2011 BETA 3.46E-02 1.83E-03 1.57E-03 AP NBF 274661001 3/23/2011 BETA 5.25E-02 2.10E-03 1.25E-03 AP SBN 274661002 3/23/2011 BETA 7.OOE-02 2.48E-03 1.13E-03 AP DOW 274661003 3/23/2011 BETA 5.38E-02 2.16E-03 1.33E-03 AP COL 274661004 3/23/2011 BETA 5.33E-02 2.24E-03 1.23E-03 AP ONS-1 274661005 3/23/2011 BETA 5.79E-02 2.35E-03 1.33E-03 AP ONS-2 274661006 3/23/2011 BETA 4.82E-02 1.93E-03 1.15E-03 AP ONS-3 274661007 3/23/2011 BETA 5.54E-02 2.12E-03 1.05E-03 AP ONS-4 274661008 3/23/2011 BETA 4.98E-02 2.06E-03 1.30E-03 AP ONS-5 274661009 3/23/2011 BETA 5.55E-02 2.26E-03 1.20E-03 AP ONS-6 274661010 3/23/2011 BETA 5.88E-02 2.37E-03 1.34E-03 AP NBF 275048001 3/30/2011 BETA 4.04E-02 1.87E-03 1.21E-03 AP SBN 275048002 3/30/2011 BETA 5.41E-02 2.16E-03 1.IOE-03 AP DOW 275048003 3/30/2011 BETA 4.35E-02 1.95E-03 1.28E-03 AP COL 275048004 3/30/2011 BETA 4.06E-02 1.92E-03 1.15E-03 AP ONS-1 275048005 3/30/2011 BETA 5.02E-02 2.12E-03 9.19E-04 AP ONS-2 275048006 3/30/2011 BETA 3.66E-02 1.80E-03 7.61E-04 AP ONS-3 275048007 3/30/2011 BETA 4.93E-02 2.18E-03 1.53E-03 AP ONS-4 275048008 3/30/2011 BETA 3.37E-02 1.69E-03 1.18E-03 AP ONS-5 275048009 3/30/2011 BETA 4.48E-02 1.98E-03 1.23E-03 AP ONS-6 275048010 3/30/2011 BETA 4.98E-02 2.14E-03 1.18E-03 AP NBF 275654001 4/6/2011 BETA 4.82E-02 2.11E-03 8.19E-04 AP SBN 275654002 4/6/2011 BETA 6.61E-02 2.50E-03 1.53E-03 AP DOW 275654003 4/6/2011 BETA 5.86E-02 2.34E-03 1.32E-03 AP COL 275654004 4/6/2011 BETA 4.99E-02 2.13E-03 1.20E-03 AP ONS-1 275654005 4/6/2011 BETA 5.23E-02 2.18E-03 1.10E-03 AP ONS-2 275654006 4/6/2011 BETA 4.54E-02 2.03E-03 1.33E-03 AP ONS-3 275654007 4/6/2011 BETA 5.30E-02 2.23E-03 I.11E-03 AP ONS-4 275654008 4/6/2011 BETA 4.56E-02 1.99E-03 9.13E-04 D-9

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-5 275654009 4/6/2011 BETA 5.3 1E-02 2.17E-03 7.84E-04 AP ONS-6 275654010 4/6/2011 BETA 4.77E-02 2.12E-03 1.53E-03 AP NBF 276211001 4/13/2011 BETA 3.15E-02 1.66E-03 1.12E-03 AP SBN 276211002 4/13/2011 BETA 3.78E-02 1.85E-03 8.95E-04 AP DOW 276211003 4/13/2011 BETA 3.06E-02 1.71E-03 1.50E-03 AP COL 276211004 4/13/2011 BETA 3.04E-02 1.70E-03 1.29E-03 AP ONS-1 276211005 4/13/2011 BETA 3.11E-02 1.69E-03 1.31E-03 AP ONS-2 276211006 4/13/2011 BETA 2.74E-02 1.59E-03 1.20E-03 AP ONS-3 276211007 4/13/2011 BETA 2.84E-02 1.62E-03 1.18E-03 AP ONS-4 276211008 4/13/2011 BETA 2.47E-02 1.45E-03 8.39E-04 AP ONS-5 276211009 4/13/2011 BETA 3.3 1E-02 1.75E-03 1.47E-03 AP ONS-6 276211010 4/13/2011 BETA 2.98E-02 1.66E-03 1.24E-03 AP NBF 276700001 4/20/2011 BETA 3.74E-02 1.74E-03 7.91E-04 AP SBN 276700002 4/20/2011 BETA 3.85E-02 1.93E-03 1.47E-03 AP DOW 276700003 4/20/2011 BETA 3.85E-02 1.92E-03 1.30E-03 AP COL 276700004 4/20/2011 BETA 4.21E-02 1.98E-03 1.30E-03 AP ONS-1 276700005 4/20/2011 BETA 3.29E-02 1.68E-03 1.09E-03 AP ONS-2 276700006 4/20/2011 BETA 3.13E-02 1.73E-03 1.42E-03 AP ONS-3 276700007 4/20/2011 BETA 2.90E-02 1.64E-03 1.14E-03 AP ONS-4 276700008 4/20/2011 BETA 3.33E-02 1.71E-03 8.57E-04 AP ONS-5 276700009 4/20/2011 BETA 3.55E-02 1.84E-03 1.45E-03 AP ONS-6 276700010 4/20/2011 BETA 3.83E-02 1.91E-03 1.30E-03 AP NBF 277144001 4/27/2011 BETA 2.17E-02 1.33E-03 8.88E-04 AP SBN 277144002 4/27/2011 BETA 3.22E-02 1.75E-03 1.50E-03 AP DOW 277144003 4/27/2011 BETA 2.51E-02 1.49E-03 1.16E-03 AP COL 277144004 4/27/2011 BETA 2.47E-02 1.48E-03 1.28E-03 AP ONS-1 277144005 4/27/2011 BETA 2.50E-02 1.48E-03 1.14E-03 AP ONS-2 277144006 4/27/2011 BETA 2.OOE-02 1.42E-03 1.31E-03 AP ONS-3 277144007 4/27/2011 BETA 2.14E-02 1.35E-03 9.OOE-04 AP ONS-4 277144008 4/27/2011 BETA 2.17E-02 1.39E-03 9.73E-04 AP ONS-5 277144009 4/27/2011 BETA 2.46E-02 1.50E-03 1.42E-03 AP ONS-6 277144010 4/27/2011 BETA 2.63E-02 1.58E-03 1.24E-03 AP NBF 277636001 5/4/2011 BETA 2.48E-02 1.48E-03 1.23E-03 AP SBN 277636002 5/4/2011 BETA 2.98E-02 1.60E-03 1.13E-03 AP DOW 277636003 5/4/2011 BETA 2.44E-02 1.45E-03 1.24E-03 AP COL 277636004 5/4/2011 BETA 2.67E-02 1.54E-03 1.07E-03 AP ONS-1 277636005 5/4/2011 BETA 2.64E-02 1.50E-03 8.80E-04 AP ONS-2 277636006 5/4/2011 BETA 1.97E-02 1.35E-03 9.52E-04 AP ONS-3 277636007 5/4/2011 BETA 2.10E-02 1.38E-03 1.35E-03 AP ONS-4 277636008 5/4/2011 BETA 2.17E-02 1.42E-03 1.25E-03 AP ONS-5 277636009 5/4/2011 BETA 2.48E-02 1.44E-03 1.17E-03 AP ONS-6 277636010 5/4/2011 BETA 2.10E-02 1.37E-03 1.15E-03 AP NBF 278137001 5/11/2011 BETA 2.94E-02 1.60E-03 1.37E-03 AP SBN 278137002 5/11/2011 BETA 3.14E-02 1.67E-03 1.29E-03 AP DOW 278137003 5/11/2011 BETA 2.50E-02 1.47E-03 9.15E-04 AP COL 278137004 5/11/2011 BETA 2.73E-02 1.56E-03 9.77E-04 AP ONS-1 278137005 5/11/2011 BETA 2.59E-02 1.56E-03 1.52E-03 AP ONS-2 278137006 5/11/2011 BETA 2.61E-02 1.67E-03 1.50E-03 AP ONS-3 278137007 5/11/2011 BETA 2.78E-02 1.62E-03 1.42E-03 AP ONS-4 278137008 5/11/2011 BETA 2.71E-02 1.51E-03 1.11E-03 AP ONS-5 278137009 5/11/2011 BETA 3.15E-02 1.65E-03 1.36E-03 D-10

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-6 278137010 5/11/2011 BETA 3.15E-02 1.72E-03 1.36E-03 AP NBF 278595001 5/18/2011 BETA 2.47E-02 1.49E-03 1.23E-03 AP SBN 278595002 5/18/2011 BETA 3.11 E-02 1.62E-03 1.06E-03 AP DOW 278595003 5/18/2011 BETA 2.99E-02 1.61E-03 1.18E-03 AP COL 278595004 5/18/2011 BETA 2.69E-02 1.57E-03 1.15E-03 AP ONS-1 278595005 5/18/2011 BETA 2.58E-02 1.48E-03 7.80E-04 AP ONS-2 278595006 5/18/2011 BETA 2.70E-02 1.58E-03 9.14E-04 AP ONS-3 278595007 5/18/2011 BETA .3.20E-02 1.73E-03 1.40E-03 AP ONS-4 278595008 5/18/2011 BETA 2.42E-02 1.48E-03 1.28E-03 AP ONS-5 278595009 5/18/2011 BETA 2.50E-02 1.50E-03 i .25E-03 AP ONS-6 278595010 5/18/2011 BETA 3.06E-02 1.64E-03 1.I OE-03 AP NBF 284170001 6/29/2011 Ac-228 -3.28E-04 4.72E-04 1.50E-03 AP NBF 284170001 6/29/2011 Ag-108m 6.21E-05 8.07E-05 2.64E-04 AP NBF 284170001 6/29/2011 Ag-110m -1.25E-04 1.46E-04 3.76E-04 AP NBF 284170001 6/29/2011 Ba- 140 -1.87E-02 3.30E-02 0.OOE+00

- AP NBF 284170001 6/29/2011 Be-7 1.22E-01 8.43E-03 8.48E-03 AP NBF 284170001 6/29/2011 Ce- 141 -9.71E-04 1.05E-03 3.16E-03 AP NBF 284170001 6/29/2011 Ce- 144 7.16E-04 5.87E-04 1.96E-03 AP NBF 284170001 6/29/2011 Co-57 -5.83E-06 7.64E-05 2.42E-04 AP NBF 284170001 6/29/2011 Co-58 -1.50E-04 2.61E-04 8.32E-04 AP NBF 284170001 6/29/2011 Co-60 -3.98E-04 1.51E-04 3.45E-04 AP NBF 284170001 6/29/2011 Cr-51 -1.39E-03 8.82E-03 2.92E-02 AP NBF 284170001 6/29/2011 Cs-134 1.62E-04 1.70E-04 5.29E-04 AP NBF 284170001 6/29/2011 Cs-137 6.26E-04 1.57E-04 3.13E-04 AP NBF 284170001 6/29/2011 Fe-59' 7.02E-04 8.47E-04 2.90E-03 AP NBF 284170001 6/29/2011 1-131 1.47E-01 5.77E-01 0.OOE+00 AP NBF 284170001 6/29/2011 K-40 1.52E-05 1.63E-03 5.55E-03 AP NBF 284170001 6/29/2011 La-140 -1.87E-02 3.30E-02 0.OOE+00 AP NBF 284170001 6/29/2011 Mn-54 -1.81E-04 1.13E-04 3.11E-04 AP NBF 284170001 6/29/2011 Nb-95 8.92E-05 2.72E-04 9.16E-04 AP NBF 284170001 6/29/2011 Ru-103 2.81E-04 4.80E-04 1.63E-03 AP NBF 284170001 6/29/2011 Ru-106 -1.88E-04 1.OIE-03 3.27E-03 AP NBF 284170001 6/29/2011 Sb-124 -4.30E-05 5.80E-04 1.88E-03 AP NBF 284170001 6/29/2011 Sb-125 -1.60E-04 2.59E-04 8.11E-04 AP NBF 284170001 6/29/2011 Se-75 7.19E-05 2.OOE-04 6.44E-04 AP NBF 284170001 6/29/2011 Th-228 5.06E-05 2.35E-04 5.59E-04 AP NBF 284170001 6/29/2011 Zn-65 1.51E-04 2.91E-04 9.84E-04 AP NBF 284170001 6/29/2011 Zr-95 -1.71E-05 5.18E-04 1.72E-03 AP SBN 284170002 6/29/2011 Ac-228 2.55E-04 4.10E-04 1.34E-03 AP SBN 284170002 6/29/2011 Ag-108m -1.01E-04 8.31E-05 2.40E-04 AP SBN 284170002 6/29/2011 Ag-110m 4.97E-05 1.84E-04 3.49E-04 AP SBN 284170002 6/29/2011 Ba-140 5.17E-04 2.14E-02 0.OOE+00 AP SBN 284170002 6/29/2011 Be-7 1.35E-01 9.35E-03 7.96E-03 AP SBN 284170002 6/29/2011 Ce-141 -1.06E-03 9.36E-04 2.77E-03 U AP SBN 284170002 6/29/2011 Ce-144 5.65E-05 5.10E-04 1.72E-03 U AP SBN 284170002 6/29/2011 Co-57 -1.44E-04 7.39E-05 2.05E-04 U AP SBN 284170002 6/29/2011 Co-58 -1.75E-04 2.29E-04 6.97E-04 U AP SBN 284170002 6/29/2011 Co-60 -7.11E-05 9.36E-05 2.81 E-04 U AP SBN 284170002 6/29/2011 Cr-51 -2.5 1E-02 1.03E-02 2.38E-02 U AP SBN 284170002 6/29/2011 Cs-134 3.10E-04 2.11E-04 5.13E-04 U AP SBN 284170002 6/29/2011 Cs-137 5.87E-04 1.51E-04 3.07E-04 UI M D-11

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP SBN 284170002 6/29/2011 Fe-59 -5.70E-04 9.21E-04 2.79E-03 U AP SBN 284170002 6/29/2011 1-131 7.92E-01 6.36E-01 0.00E+00 UI AP SBN 284170002 6/29/2011 K-40 -2.04E-03 1.20E-03 3.67E-03 U AP SBN 284170002 6/29/2011 La-140 5.17E-04 2.14E-02 0.00E+00 UI AP SBN 284170002 6/29/2011 Mn-54 -3.65E-05 1.12E-04 3.47E-04 U AP SBN 284170002 6/29/2011 Nb-95 -4.75E-05 2.60E-04 8.48E-04 U AP SBN 284170002 6/29/2011 Ru-103 6.65E-04 4.95E-04 1.64E-03 U AP SBN 284170002 6/29/2011 Ru-106 -I.39E-03 1.08E-03 3.16E-03 U AP SBN 284170002 6/29/2011 Sb-124 5.29E-04 6.46E-04 2.32E-03, U AP SBN 284170002 6/29/2011 Sb-125 -1.31E-04 2.67E-04 8.39E-04 U AP SBN 284170002 6/29/2011 Se-75 4.42E-04 2.07E-04 6.48E-04 U AP SBN 284170002 6/29/2011 Th-228 6.37E-06 1.68E-04 5.52E-04 U AP SBN 284170002 6/29/2011 Zn-65 -6.24E-04 2.89E-04 5.37E-04 U AP SBN 284170002 6/29/2011 Zr-95 -2.96E-04 4.61E-04 1.44E-03 U AP DOW 284170003 6/29/2011 Ac-228 8.62E-04 7.03E-04 2.40E-03 U AP DOW 284170003 6/29/2011 Ag-108m 7.13E-07 7.88E-05 2.61E-04 U AP DOW 284170003 6/29/2011 Ag-ll0m 1.67E-04 1.IIE-04 3.66E-04 U AP DOW 284170003 6/29/2011 Ba-140 2.21E-02 3.48E-02 1.23E-01. U AP DOW 284170003 6/29/2011 Be-7. 1.32E-01 1.17E-02 9.67E-03 AP DOW 284170003 6/29/2011 Ce-141 1.12E-03 7.99E-04 2.65E-03 U AP DOW 284170003 6/29/2011 Ce-144 1.03E-04 4.22E-04 1.42E-03 U AP DOW 284170003 6/29/2011 Co-57 7.50E-05 5.92E-05 1.99E-04 U AP DOW 284170003 6/29/2011 Co-58 -4.48E-05 2.53E-04 8.28E-04 U AP DOW 284170003 6/29/2011 Co-60 -6.67E-05 1.43E-04 4.74E-04 U AP DOW 284170003 6/29/2011 Cr-51 -6.65E-03 8.76E-03 2.80E-02 U AP DOW 284170003 6/29/2011 Cs-134 8.49E-04 2.76E-04 6.83E-04 UI M AP DOW 284170003 6/29/2011 Cs-137 7.88E-04 2.01E-04 3.27E-04 UI M AP DOW 284170003 6/29/2011 Fe-59 -1.01E-03 9.70E-04 2.61E-03 U AP DOW 284170003 6/29/2011 1-131 8.OOE-01 5.23E-01 0.OOE+00 UI AP DOW 284170003 6/29/2011 K-40 -2.52E-04 1.40E-03 4.55E-03 U AP DOW 284170003 6/29/2011 La-140 2.21E-02 3.48E-02 1.23E-01 U AP DOW 284170003 6/29/2011 Mn-54 -2.1OE-04 1.63E-04 4.59E-04 U AP DOW 284170003 6/29/2011 Nb-95 1.79E-04 3.21E-04 1.11E-03 U AP DOW 284170003 6/29/2011 Ru-103 5.52E-05 5.82E-04 1.92E-03 U AP DOW 284170003 6/29/2011 Ru-106 8.76E-04 1.28E-03 4.29E-03 U AP DOW 284170003 6/29/2011 Sb-124 .- 1.12E-03 9.02E-04 2.16E-03 U AP DOW 284170003 6/29/2011 Sb-125 -2.63E-04 2.55E-04 7.58E-04 U AP DOW 284170003 6/29/2011 Se-75 6.33E-06 1.91E-04 6.09E-04 U AP DOW 284170003 6/29/2011 Th-228 -1.48E-04 1.95E-04 5.94E-04 U AP DOW 284170003 6/29/2011 Zn-65 -9.82E-05 3.20E-04 9.97E-04 U AP DOW 284170003 6/29/2011 Zr-95 9.53E-04 6.93E-04 2.41E-03 U AP COL 284170004 6/29/2011 Ac-228 1.51E-04 6.89E-04 2.39E-03 U AP COL 284170004 6/29/2011 Ag-108m -3.1OE-06 1.28E-04 4.17E-04 U AP COL 284170004 6/29/2011 Ag-il0m -3.05E-04 2.21E-04 6.30E-04 U AP COL 284170004. 6/29/2011 Ba-140 -4.49E-02 5.31E-02 0.OOE+00 U AP COL 284170004 6/29/2011 Be-7 1.34E-01 1.28E-02 1.20E-02 AP COL 284170004 6/29/2011 Ce-141 -1.22E-03 1.34E-03 3.96E-03 U AP COL 284170004 6/29/2011 Ce-144 -3.58E-04 7.45E-04 2.27E-03 U AP COL 284170004 6/29/2011 Co-57 -9.22E-05 8.81E-05 2.67E-04 U AP COL 284170004 6/29/2011 Co-58 2.66E-04 3.63E-04 1.26E-03 U AP COL 284170004 6/29/2011 Co-60 -9.87E-05 2.22E-04 7.OOE-04 U D-12

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP COL 284170004 6/29/2011 Cr-51 -1.71E-02 1.31E-02 3.83E-02 U AP COL 284170004 6/29/2011 Cs-134 8.44E-04 3.52E-04 1.11E-03 U AP COL. 284170004 6/29/2011 Cs-137 4.65E-04 2.24E-04 7.35E-04 U AP COL 284170004 6/29/2011 Fe-59 -1.60E-04 1.57E-03 5.24E-03 U AP COL 284170004 6/29/2011 1-131 -1.17E+00 8.76E-01 0.OOE+00 U AP COL 284170004 6/29/2011 K-40 2.19E-03 2.5 1E-03 9.24E-03 U AP COL 284170004 6/29/2011 La-140 -4.49E-02 5.30E-02 0.OOE+00 U AP COL 284170004 6/29/2011 Mn-54 -1.84E-04 2.07E-04 5.82E-04 U AP COL 284170004 6/29/2011 Nb-95 1.07E-05 4.75E-04 1.57E-03 U AP COL 284170004 6/29/2011 Ru-103 1.50E-03 8.26E-04 2.74E-03 U AP COL 284170004 6/29/2011 Ru-106 -3.OOE-03 1.92E-03 5.36E-03 U AP COL 284170004 6/29/2011 Sb-124 -6.45E-04 1.23E-03 3.80E-03 U AP COL 284170004 6/29/2011 Sb-125 -3.44E-04 4.22E-04 1.29E-03 U AP COL 284170004 6/29/2011 Se-75 3.76E-04 2.90E-04 9.81E-04 U AP COL 284170004 6/29/2011 Th-228 1.74E-04 3.50E-04 8.09E-04 U AP COL 284170004 6/29/2011 Zn-65 -1.65E-04 5.03E-04 1.54E-03 U AP COL 284170004 6/29/2011 Zr-95 -7.50E-04 8.OOE-04 2.37E-03 U AP ONS-1 284170005 6/29/2011 Ac-228 3.40E-04 4.71E-04 1.59E-03 U AP ONS-1 284170005 6/29/2011 Ag-108m -6.59E-05 8.30E-05 2.56E-04 U AP ONS-1 284170005 6/29/2011 Ag-1 0m 1.29E-04 1.30E-04 3.77E-04 U AP ONS-1 284170005 6/29/2011 Ba- 140 -8.75E-03 3.01E-02 9.66E-02 U AP ONS-1 284170005 6/29/2011 Be-7 1.29E-01 9.49E-03 8.75E-03 AP ONS-1 284170005 6/29/2011 Ce- 141 -1.31E-03 1.04E-03 3.02E-03 U AP ONS-1 284170005 6/29/2011 Ce- 144 -2.53E-04 5.18E-04 1.72E-03 U AP ONS-1 284170005 6/29/2011 Co-57 -1.13E-04 8.43E-05 2.43E-04 U AP ONS-1 284170005 6/29/2011 Co-58 -1.75E-05 2.43E-04 8.02E-04 U AP ONS-1 284170005 6/29/2011 Co-60 -4.78E-04 1.72E-04 3.72E-04 U AP ONS-1 284170005 6/29/2011 Cr-51 -4.88E-03 8.23E-03 2.66E-02 U AP ONS-1 284170005 6/29/2011 Cs-134 2.24E-04 1.70E-04 5.21E-04 U AP ONS-1 284170005 6/29/2011 Cs-137 3.84E-04 2.08E-04 3.1OE-04 UI M AP ONS-1 284170005 6/29/2011 Fe-59 -9.47E-04 9.07E-04 2.73E-03 U AP ONS-1 284170005 6/29/2011 1-131 8.77E-01 5.55E-01 0.00E+00 UI AP ONS-1 284170005 6/29/2011 K-40 -7.28E-04 1.60E-03 5.31E-03 U AP ONS-1 284170005 6/29/2011 La-140 -8.75E-03 3.01E-02 9.66E-02 U AP ONS-1 284170005 6/29/2011 Mn-54 6.09E-05 1.19E-04 3.99E-04 U AP ONS-1 284170005 6/29/2011 Nb-95 3.55E-04 2.96E-04 9.96E-04 U AP ONS-1 284170005 6/29/2011 Ru-103 -7.46E-04 4.89E-04 1.42E-03 U AP ONS-1 284170005 6/29/2011 Ru-106 8.89E-04 9.83E-04 3.27E-03 U AP ONS-1 284170005 6/29/2011 Sb-124 -8.41E-04 6.68E-04 1.81E-03 U AP ONS-1 284170005 6/29/2011 Sb-125 2.81E-04 .2.71E-04 8.86E-04 U AP ONS-1 284170005 6/29/2011 Se-75 1.27E-04 1.95E-04 6.28E-04 U AP ONS-1 284170005 6/29/2011 Th-228 9.47E-05 2.48E-04 5.34E-04 U AP ONS-1 284170005 6/29/2011 Zn-65 -4.26E-04 2.93E-04 8.27E-04 U AP ONS-1 284170005 6/29/2011 Zr-95 -2.39E-04 4.76E-04 1.54E-03 U AP ONS-2 284170006 6/29/2011 Ac-228 5.85E-04 3.93E-04 1.34E-03 U AP ONS-2 284170006 6/29/2011 Ag-108m -3.59E-05 7.58E-05 2.40E-04 U.

AP ONS-2 284170006 6/29/2011 Ag-1 10m -8.86E-05 1.22E-04 3.19E-04 U AP ONS-2 284170006 6/29/2011 Ba-140 4.98E-03 2.77E-02 0.OOE+00 UI AP ONS-2 284170006 6/29/2011 Be-7 1.15E-01 9.59E-03 9.30E-03 AP ONS-2 284170006 6/29/2011 Ce- 141 5.54E-04 9.50E-04 3.OOE-03 U AP ONS-2 284170006 6/29/2011 Ce- 144 -4.10E-04 5.65E-04 1.79E-03 U D-13

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-2 284170006 6/29/2011 Co-57 2.84E-05 6.56E-05 2.20E-04 U AP ONS-2 284170006 6/29/2011 Co-58 -1.51E-04 2.35E-04 7.24E-04 U AP ONS-2 284170006 6/29/2011 Co-60 -1.89E-04 1.33E-04 3.48E-04 U AP ONS-2 284170006 6/29/2011 Cr-51 1.08E-02 8.76E-03 2.96E-02 U AP ONS-2 284170006 6/29/2011 Cs-134 5.38E-04 2.68E-04 5.90E-04 U AP ONS-2 284170006 6/29/2011 Cs-137 3.70E-04 1.33E-04 2.91 E-04 M AP ONS-2 284170006 6/29/2011 Fe-59 -2.41E-04 7.43E-04 2.39E-03 U AP ONS-2 284170006 6/29/2011 1-131 -3.70E-01 6.06E-01 0.OOE+00 U AP ONS-2 284170006 6/29/2011 K-40 1.76E-03 1.80E-03 2.71 E-03 U AP ONS-2 284170006 6/29/2011 La-140 4.98E-03 2.77E-02 0.OOE+00 UI AP ONS-2 284170006 6/29/2011 Mn-54 3.74E-06 1.19E-04 3.92E-04 U AP ONS-2 284170006 6/29/2011 Nb-95 -2.36E-04 2.65E-04 7.94E-04 U AP ONS-2 284170006 6/29/2011 Ru- 103 4.74E-04 5.38E-04 1.80E-03 U AP ONS-2 284170006 6/29/2011 Ru-106 4.02E-04 1.02E-03 3.48E-03 U AP ONS-2 284170006 6/29/2011 Sb-124 5.11E-04 7.24E-04 2.60E-03 U AP "ONS-2 284170006 6/29/2011 Sb-125 2.76E-04 2.68E-04 9.04E-04 U AP ONS-2 284170006 6/29/2011 Se-75 -4.05E-05 1.88E-04 6.27E-04 U AP ONS-2 284170006 6/29/2011 Th-228 -3.72E-05 1.51E-04 4.81E-04 U AP ONS-2 284170006 6/29/2011 Zn-65 1.87E-04 2.85E-04 9.91 E-04 U AP ONS-2 284170006 6/29/2011 Zr-95 3.81E-05 4.27E-04 1.42E-03 U AP ONS-3 284170007 6/29/2011 Ac-228 -3.76E-04 3.92E-04 1.1 2E-03 U AP ONS-3 284170007 6/29/2011 Ag-108m -1.25E-04 7.76E-05 2.07E-04 U AP ONS-3 284170007 6/29/2011 Ag-il0m 1.13E-04 9.35E-05 3.04E-04 U AP ONS-3 284170007 6/29/2011 Ba- 140 -3.5 1E-02 2.87E-02 7.21E-02 U AP ONS-3 284170007 6/29/2011 Be-7 1.29E-01 9.63E-03 8.2 1E-03 AP ONS-3 284170007 6/29/2011 Ce- 141 -5.62E-04 7.46E-04 2.28E-03 U AP ONS-3 284170007 6/29/2011 Ce-144 3.39E-04 4.58E-04 1.51E-03 U AP ONS-3 284170007 6/29/2011 Co-57 4.37E-05 5.92E-05 1.96E-04 U AP ONS-3 284170007 6/29/2011 Co-58 1.23E-04 2.37E-04 7.77E-04 U AP ONS-3 284170007 6/29/2011 Co-60 -1.03E-05 1.23E-04 4.08E-04 U AP ONS-3 284170007 6/29/2011 Cr-51 -1.23E-03 7.18E-03 2.36E-02 U AP ONS-3 284170007 6/29/2011 Cs-134 6.69E-04 2.58E-04 5.90E-04 UI M AP ONS-3 284170007 6/29/2011 Cs-137 6.57E-04 1.84E-04 3.07E-04 M AP ONS-3 284170007 6/29/2011 Fe-59 7.63E-04 8.57E-04 2.94E-03 U AP ONS-3 284170007 6/29/2011 1-131 2.06E-01 4.36E-01 0.OOE+00 UI AP ONS-3 284170007 6/29/2011 K-40 1.83E-03 1.46E-03 5.58E-03 U AP ONS-3 284170007 6/29/2011 La- 140 -3.51 E-02 2.86E-02 7.21E-02 U AP ONS-3 284170007 6/29/2011 Mn-54 2.87E-05 1.12E-04 3.75E-04 U AP ONS-3 284170007 6/29/2011 Nb-95 2.96E-04 2.57E-04 8.92E-04 U AP ONS-3 284170007 6/29/2011 Ru-103 -6.72E-04 4.73E-04 1.27E-03 U AP ONS-3 284170007 6/29/2011 Ru-106 5.28E-04 8.38E-04 2.91E-03 U AP ONS-3 284170007 6/29/2011 Sb-124 -6.69E-04 8.21E-04 2.32E-03 U AP ONS-3 284170007 6/29/2011 Sb-125 -4.14E-04 2.39E-04 6.17E-04 U AP ONS-3 284170007 6/29/2011 Se-75 1.97E-04 1.65E-04 5.61E-04 U AP ONS-3 284170007 6/29/2011 Th-228 6.68E-04 3.42E-04 5.35E-04 UI AP ONS-3 284170007 6/29/2011 Zn-65 -2.24E-05 2.80E-04 8.93E-04 U AP ONS-3 284170007 6/29/2011 Zr-95 -6.28E-05 3.56E-04 1.16E-03 U AP ONS-4 284170008 6/29/2011 Ac-228 -1. 19E-04 3.81 E-04 1.24E-03 U AP ONS-4 284170008 6/29/2011 Ag-108m -6.09E-05 7.78E-05 2.37E-04 U AP ONS-4 284170008 6/29/2011 Ag-il0m *-8.78E-05 1.16E-04 3.04E-04 U AP ONS-4 284170008 6/29/2011 Ba-140 2.29E-02 2.27E-02 8.18E-02 U D-14

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-4 284170008 6/29/2011 Be-7 1.15E-01 8.57E-03 7.31E-03 AP ONS-4 284170008 6/29/2011 Ce-I141 9.55E-04 7.49E-04 2.31E-03 U AP ONS-4 284170008 6/29/2011 Ce- 144 -1.39E-03 5.48E-04 1.19E-03 U AP ONS-4 284170008. 6/29/2011 Co-57 -5.25E-06 5.05E-05 1.63E-04 U AP ONS-4 284170008 6/29/2011 Co-58 2.45E-04 2.21E-04 7.59E-04 U AP ONS-4 284170008 6/29/2011 Co-60 2.93E-04 1.04E-04 3.65E-04 U AP ONS-4 284170008 6/29/2011 Cr-51 -3.04E-03 7.82E-03 2.39E-02 U AP ONS-4 284170008 6/29/2011 Cs-134 2.37E-04 1.50E-04 4.58E-04 U AP ONS-4 284170008 6/29/2011 Cs-137 2.65E-04 1.21E-04 2.80E-04 U AP ONS-4 284170008 6/29/2011 Fe-59 -5.81E-04 7.1 1E-04 2.12E-03 U AP ONS-4 284170008 6/29/2011 1-131 2.73E-01 4.39E-01 0.OOE+00 UI AP ONS-4 284170008 6/29/2011 K-40 3.49E-03 1.1OE-03 2.61E-03 UI AP ONS-4 284170008 6/29/2011 La-140 2.29E-02 2.27E-02 8.18E-02 U AP ONS-4 284170008 6/29/2011 Mn-54 3.97E-05 9.64E-05 3.24E-04 U AP ONS-4 284170008 6/29/2011 Nb-95 -1.67E-04 2.19E-04 6.62E-04 U AP ONS-4 284170008 6/29/2011 Ru-103 -4.61E-04 5.12E-04 1.38E-03 U AP ONS-4 284170008 6/29/2011 Ru-106 4.82E-04 8.64E-04 2.96E-03 U AP ONS-4 284170008 6/29/2011 Sb-124 -8.34E-04 8.33E-04 2.42E-03 U AP ONS-4 284170008 6/29/2011 Sb-125 - 1.88E-04 2.15E-04 6.43E-04 U AP ONS-4 284170008 6/29/2011 Se-75 2.13E-04 1.77E-04 5.94E-04 U AP ONS-4 284170008 6/29/2011 Th-228 1.74E-04 1.87E-04 4.67E-04 U AP ONS-4 284170008 6/29/2011 Zn-65 1.46E-04 2.73E-04 9.39E-04 U AP ONS-4 284170008 6/29/2011 Zr-95 -2.09E-04 3.69E-04 1.14E-03 U AP ONS-5 284170009 6/29/2011 Ac-228 -8.17E-04 4.56E-04 1.07E-03 U AP ONS-5 284170009 6/29/2011 Ag-108m -1.00E-04 8.44E-05 2.44E-04 U AP ONS-5 284170009 6/29/2011 Ag-Il0m 9.22E-07 1.38E-04 3.95E-04 U AP ONS-5 284170009 6/29/2011 Ba-140 4.77E-02 2.68E-02 9.97E-02 U AP ONS-5 284170009 6/29/2011 Be-7 1.24E-01 9.77E-03 9.68E-03 AP ONS-5 284170009 6/29/2011 Ce-141 -1.90E-03 1.07E-03 2.92E-03 U AP ONS-5 284170009 6/29/2011 Ce-144 - 1.29E-04 5.52E-04 1.84E-03 U AP ONS-5 284170009 6/29/2011 Co-57 -4.85E-05 6.53E-05 2.11E-04 U AP ONS-5 284170009 6/29/2011 Co-58 -3.34E-04 2.85E-04 8.27E-04 U AP ONS-5 284170009 6/29/2011 Co-60 0.OOE+00 0.OOE+00 3.87E-04 U AP ONS-5 284170009 6/29/2011 Cr-51 5.66E-03 8.86E-03 2.96E-02 U AP ONS-5 284170009 6/29/2011 Cs-134 4.95E-04 1.95E-04 6.03E-04 U AP ONS-5 284170009 6/29/2011 Cs-137 5.81 E-04 1.99E-04 5.27E-04 UI M AP ONS-5 284170009 6/29/2011 Fe-59 1.99E-04 9.65E-04 3.19E-03 U AP ONS-5 284170009 6/29/2011 1-131 -1.22E+00 6.53E-01 0.OOE+00 U AP ONS-5 284170009 6/29/2011 K-40 -2.22E-03 1.53E-03 4.78E-03 U AP ONS-5 284170009 6/29/2011 La- 140 4.77E-02 2.68E-02 9.97E-02 U AP ONS-5 284170009 6/29/2011 Mn-54 1.15E-05 1.1OE-04 3.52E-04 U AP ONS-5 284170009 6/29/2011 Nb-95 1.25E-04 2.78E-04 9.41E-04 U AP ONS-5 284170009 6/29/2011 Ru-I103 -2.55E-04 5.14E-04 1.59E-03 U AP ONS-5 284170009 6/29/2011 Ru-106 2.80E-04 9.43E-04 3.20E-03 U AP ONS-5 284170009 6/29/2011 Sb-124 5.34E-04 7.73E-04 2.72E-03 U AP ONS-5 284170009 6/29/2011 Sb-125 3.07E-04 2.74E-04 9.11E-04 U AP ONS-5 284170009 6/29/2011 Se-75 7.03E-06 1.90E-04 6.26E-04 U AP ONS-5 284170009 6/29/2011 Th-228 -3.42E-04 1.95E-04 5.48E-04 U AP ONS-5 284170009 6/29/2011 Zn-65 -1.66E-04 3.43E-04 1.06E-03 U AP ONS-5 284170009 6/29/2011 Zr-95 6.47E-04 4.78E-04 1.65E-03 U AP ONS-6 284170010 6/29/2011 Ac-228 8.93E-05 3.41E-04 1.14E-03 U D-15

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-6 284170010 6/29/2011 Ag-108m -1.15E-04 9.12E-05 2.67E-04 U AP ONS-6 284170010 6/29/2011 Ag-110m -2.50E-04 1.43E-04 3.88E-04 U AP ONS-6 284170010 6/29/2011 Ba-140 3.58E-02 2.90E-02 1.04E-01 U AP ONS-6 284170010 6/29/2011 Be-7 1.34E-01 1.02E-02 8.94E-03 AP ONS-6 284170010 6/29/2011 Ce- 141 1.37E-03 1.02E-03 3.18E-03 U AP ONS-6 284170010 6/29/2011 Ce- 144 -4.22E-04 5.05E-04 1.58E-03 U AP ONS-6 284170010 6/29/2011 Co-57 2.88E-05 7.37E-05 2.47E-04 U AP ONS-6 284170010 6/29/2011 Co-58 -1.84E-04 2.10E-04 6.19E-04 U AP ONS-6 284170010 6/29/2011 Co-60 -1.60E-05 1.03E-04 3.33E-04 U AP ONS-6 284170010 6/29/2011 Cr-51 1.18E-02 9.06E-03 3.04E-02 U AP ONS-6 284170010 6/29/2011 Cs-134 5.72E-04 2.03E-04 4.99E-04 UI M AP ONS-6 284170010 6/29/2011 Cs-137 2.97E-04 1.36E-04 4.40E-04 U AP ONS-6 284170010 6/29/2011 Fe-59 -2.67E-04 8.64E-04 2.80E-03 U AP ONS-6 284170010 6/29/2011 1-131 9.85E-02 5.48E-01 0.OOE+00 UI AP ONS-6 284170010 6/29/2011 K-40 1.06E-03 1.28E-03 4.44E-03 U AP ONS-6 284170010 6/29/2011 La-140 3.58E-02 2.89E-02 1.04E-01 U AP ONS-6 284170010 6/29/2011 Mn-54 4.96E-05 1.16E-04 3.92E-04 U AP ONS-6 284170010 6/29/2011 Nb-95 4.91E-04 2.96E-04 I.01E-03 U AP ONS-6 284170010 6/29/2011 Ru-103 -6.70E-05 5.OOE-04 1.61E-03 U AP ONS-6 284170010 6/29/2011 Ru-106 3.05E-04 1.05E-03 3.59E-03 U AP ONS-6 284170010 6/29/2011 Sb- 124 -4.63E-04 6.17E-04 1.79E-03 U AP ONS-6 284170010 6/29/2011 Sb-125 4.16E-04 2.96E-04 9.84E-04 U AP ONS-6 284170010 6/29/2011 Se-75 -3.69E-04 2.18E-04 6.28E-04 U AP ONS-6 284170010 6/29/2011 Th-228 2.85E-04 1.94E-04 5.07E-04 U AP ONS-6 284170010 6/29/2011 Zn-65 1.28E-04 2.98E-04 1.02E-03 U AP ONS-6 284170010 6/29/2011 Zr-95 5.23E-04 4.92E-04 1.70E-03 U AP NBF 278990001 5/25/2011 BETA 2.26E-02 1.43E-03 1.20E-03 AP SBN 278990002 5/25/2011 BETA 2.82E-02 1.54E-03 1.27E-03 AP DOW 278990003 5/25/2011 BETA 2.40E-02 1.46E-03 1.08E-03 AP COL 278990004 5/25/2011 BETA 2.25E-02 1.40E-03 8.70E-04 AP ONS-1 278990005 5/25/2011 BETA 2.13E-02 1.40E-03 1.40E-03 AP ONS-2 278990006 5/25/2011 BETA 1.80E-02 1.30E-03 1.22E-03 AP ONS-3 278990007 5/25/2011 BETA 2.64E-02 1.62E-03 1.35E-03 AP ONS-4 278990008 5/25/2011 BETA 2.20E-02 1.37E-03 1.11E-03 AP ONS-5 278990009 5/25/2011 BETA 2.07E-02 1.35E-03 1.31E-03 AP ONS-6 278990010 5/25/2011 BETA 2.50E-02 1.52E-03 1.12E-03 AP NBF 279343001 6/1/2011 BETA 2.66E-02 1.53E-03 1.28E-03 AP SBN 279343002 6/1/2011 BETA 2.69E-02 1.48E-03 I.O1E-03 AP DOW 279343003 6/1/2011 BETA 2.72E-02 1.54E-03 1.28E-03 AP COL 279343004 6/1/2011 BETA 2.19E-02 1.43E-03 1.44E-03 AP ONS-1 279343005 6/1/2011 BETA 2.20E-02 1.37E-03 8.34E-04 AP ONS-2 279343006 6/1/2011 BETA 2.41E-02 1.50E-03 1.39E-03 AP ONS-3 279343007 6/1/2011 BETA 2.73E-02 1.71E-03 1.42E-03 AP ONS-4 279343008 6/1/2011 BETA 2.54E-02 1.49E-03 1.26E-03 AP ONS-5 279343009 6/1/2011 BETA 2.63E-02 1.49E-03 1.06E-03 AP ONS-6 279343010 6/1/2011 BETA 2.68E-02 1.58E-03 1.36E-03 AP NBF 279806001 6/8/2011 BETA 4.47E-02 2.OOE-03 1.29E-03 AP ' SBN 279806002 6/8/2011 BETA 4.75E-02 2.07E-03 1.16E-03 AP DOW 279806003 6/8/2011 BETA 4.36E-02 1.97E-03 1.32E-03 AP COL 279806004 6/8/2011 BETA 4.58E-02 2.04E-03 1.38E-03 AP ONS-1 279806005 6/8/2011 BETA 4.51E-02 2.03E-03 1.25E-03 D-16

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-2 279806006 6/8/2011 BETA 4.13E-02 1.94E-03 1.39E-03 AP ONS-3 279806007 6/8/2011 BETA 5.04E-02 2.20E-03 1.22E-03 AP ONS-4 279806008 6/8/2011 BETA 3.94E-02 1.84E-03 1.23E-03 AP .ONS-5 279806009 6/8/2011 BETA 4.39E-02 1.97E-03 1.14E-03 AP ONS-6 279806010 6/8/2011 BETA 5.05E-02 2.13E-03 1.34E-03 AP NBF 280248001 6/15/2011 BETA 2.25E-02 1.41 E-03 1.20E-03 AP SBN 280248002 6/15/2011 BETA 2.68E-02 1.58E-03 8.76E-04 AP DOW 280248003 6/15/2011 BETA 2.32E-02 1.46E-03 1.15E-03 AP COL 280248004 6/15/2011 BETA 2.36E-02 1.45E-03 1.27E-03 AP ONS-1 280248005 6/15/2011 BETA 2.21E-02 1.39E-03 1.1IE-03 AP ONS-2 280248006 6/15/2011 BETA 2.19E-02 1.39E-03 1.20E-03 AP ONS-3 280248007 6/15/2011 BETA 2.02E-02 1.40E-03 9.14E-04 AP ONS-4 280248008 6/15/2011 BETA 2.25E-02 1.43E-03 1.13E-03 AP ONS-6 280248010 6/15/2011 BETA 1.92E-02 1.34E-03 1.32E-03 AP NBF 280647001 6/22/2011 BETA 3.33E-02 1.75E-03 1.49E-03 AP SBN 280647002 6/22/2011 BETA 3.40E-02 1.81E-03 1.66E-03 AP DOW 280647003 6/22/2011 BETA 3.37E-02 1.78E-03 1.24E-03 AP COL 280647004 6/22/2011 BETA 2.72E-02 1.57E-03 1.27E-03 AP ONS-1 280647005 6/22/2011 BETA 2.78E-02 1.54E-03 1.03E-03 AP. ONS-2 280647006 6/22/2011 BETA 2.82E-02 1.60E-03 1.29E-03 AP ONS-3 280647007 6/22/2011 BETA 3.61E-02 1.85E-03 1.53E-03 AP ONS-4 280647008 6/22/2011 BETA 2.93E-02 1.64E-03 1.58E-03 AP ONS-5 280647009 6/22/2011 BETA 2.94E-02 1.61E-03 1.16E-03 AP ONS-6 280647010 6/22/2011 BETA 3.07E-02 1.68E-03 1.29E-03 AP NBF 281029001 6/29/2011 BETA 2.32E-02 1.46E-03 1.31E-03 AP SBN 281029002 6/29/2011 BETA 2.09E-02 1.35E-03 1.1OE-03 AP DOW 281029003 6/29/2011 BETA 2.07E-02 1.38E-03 1.37E-03 AP COL 281029004 6/29/2011 BETA 1.99E-02 1.36E-03 1.33E-03 AP ONS-1 281029005 6/29/2011 BETA 2.61E-02 1.55E-03 1.24E-03 AP ONS-2 281029006 6/29/2011 BETA 2.12E-02 1.34E-03 1.21E-03 AP ONS-3 281029007 6/29/2011 BETA 2.96E-02 1.66E-03 1.18E-03 AP ONS-4 281029008 6/29/2011 BETA 2.22E-02 1.46E-03 1.44E-03 AP ONS-5 281029009 6/29/2011 BETA 2.16E-02 1.46E-03 1.40E-03 AP ONS-6 281029010 6/29/2011 BETA 2.28E-02 1.48E-03 1.29E-03 AP NBF 281623001 7/6/2011 BETA 3.53E-02 1.81E-03 1.32E-03 AP SBN 281623002 7/6/2011 BETA 3.68E-02 1.84E-03 1.21E-03 AP DOW 281623003 7/6/2011 BETA 3.87E-02 1.93E-03 1.36E-03 AP COL 281623004 7/6/2011 BETA 3.77E-02 1.86E-03 1.37E-03 AP ONS-1 281623005 7/6/2011 BETA 3.60E-02 1.88E-03 1.67E-03 AP ONS-2 281623006 7/6/2011 BETA 3.63E-02 1.91E-03 1.16E-03 AP ONS-3 281623007 7/6/2011 BETA 4.79E-02 2.19E-03 1.54E-03 AP ONS-4 281623008 7/6/2011 BETA 3.14E-02 1.77E-03 1.40E-03 AP ONS-5 281623009 7/6/2011 BETA 3.56E-02 1.86E-03 1.28E-03 AP ONS-6 281623010 7/6/2011 BETA 3.98E-02 1.90E-03 1.28E-03 AP NBF 282125001 7/13/2011 BETA 3.76E-02 1.89E-03 1.28E-03 AP SBN 282125002 7/13/2011 BETA 3.73E-02 1.89E-03 1.43E-03 AP DOW 282125003 7/13/2011 BETA 3.98E-02 1.94E-03 1.20E-03 AP COL 282125004 7/13/2011 BETA 3.17E-02 1.71E-03 1.31E-03 AP ONS-1 282125005 7/13/2011 BETA 3.64E-02 1.90E-03 1.47E-03 AP ONS-2 282125006 7/13/2011 BETA 3.27E-02 1.85E-03 1.88E-03 AP ONS-3 282125007 7/13/2011 BETA 4.80E-02 2.20E-03 1.18E-03 D-17

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-4 282125008 7/13/2011 BETA 3.56E-02 1.97E-03 1.77E-03 AP ONS-5 282125009 7/13/2011 BETA 3.79E-02 1.91E-03 1.30E-03 AP ONS-6 282125010 7/13/2011 BETA 3.71E-02 1.88E-03 1.43E-03 AP NBF 282602001 7/20/2011 BETA 4.82E-02 2.41E-03 1.83E-03 AP SBN 282602002 7/20/2011 BETA 5.40E-02 2.65E-03 1.98E-03 AP DOW 282602003 7/20/2011 BETA 4.52E-02 2.40E-03 1.93E-03 AP COL 282602004 7/20/2011 BETA 4.74E-02 2.40E-03 1.84E-03 AP ONS-1 282602005 7/20/2011 BETA 5.33E-02 2.63E-03 1.98E-03 AP ONS-2 282602006 7/20/2011 BETA 4.25E-02 2.36E-03 1.96E-03 AP ONS-3 282602007 7/20/2011 BETA 5.73E-02 2.79E-03 2.07E-03 AP ONS-4 282602008 7/20/2011 BETA 4.33E-02 2.38E-03 1.97E-03 AP ONS-5 282602009 7/20/2011 BETA 4.28E-02 2.19E-03 1.69E-03 AP ONS-6 282602010 7/20/2011 BETA 4.79E-02 2.40E-03 1.83E-03 AP NBF 283038001 7/27/2011 BETA 4.23E-02 2.28E-03 1.86E-03 AP SBN 283038002 7/27/2011 BETA 3.61E-02 2.17E-03 1.94E-03 AP DOW 283038003 7/27/2011 BETA 3.89E-02 2.29E-03 2.02E-03 AP COL 283038004 7/27/2011 BETA 3.71E-02 2.15E-03 1.87E-03 AP ONS-1 283038005 7/27/2011 BETA 3.70E-02 2.16E-03 1.89E-03 AP ONS-2 283038006 7/27/2011 BETA 4.00E-02 2.29E-03 1.98E-03 AP ONS-3 283038007 7/27/2011 BETA 5.22E-02 2.54E-03 1.88E-03 AP ONS-4 283038008 7/27/2011 BETA 3.59E-02 2.18E-03 1.97E-03 AP ONS-5 283038009 7/27/2011 BETA 3.69E-02 2.17E-03 1.91E-03 AP ONS-6 283038010 7/27/2011 BETA 3.27E-02 2.03E-03 1.87E-03 AP NBF 283532001 8/3/2011 BETA 5.41E-02 2.25E-03 1.59E-03 AP SBN 283532002 8/3/2011 BETA 6.44E-02 2.88E-03 1.93E-03 AP DOW 283532003 8/3/2011 BETA 5.60E-02 2.71E-03 1.97E-03 AP COL 283532004 8/3/2011 BETA 5.03E-02 2.47E-03 1.82E-03 AP ONS-1 283532005 8/3/2011 BETA 5.34E-02 2.54E-03 1.81E-03 AP ONS-2 283532006 8/3/2011 BETA 6.39E-02 2.85E-03 1.92E-03 AP ONS-3 283532007 8/3/2011 BETA 8.45E-02 3.28E-03 1.93E-03 AP ONS-4 283532008 8/3/2011 BETA 5.26E-02 2.62E-03 1.95E-03 AP ONS-5 283532009 8/3/2011 BETA 4.49E-02 2.34E-03 .1.81E-03 AP ONS-6 283532010 8/3/2011 BETA 5.89E-02 2.65E-03 1.80E-03 AP NBF 283976001 8/10/2011 BETA 3.97E-02 2.17E-03 1.76E-03 AP SBN 283976002 8/10/2011 BETA 5.16E-02 2.52E-03 1.84E-03 AP DOW 283976003 8/10/2011 BETA 4.02E-02 2.30E-03 1.94E-03 AP COL 283976004 8/10/2011 BETA 3.57E-02 2.11E-03 1.84E-03 AP ONS-1 283976005 8/10/2011 BETA 3.76E-02 2.20E-03 1.91E-03 AP ONS-2 283976006 8/10/2011 BETA 3.58E-02 2.12E-03 1.86E-03 AP ONS-3 283976007 8/10/2011 BETA 5.01E-02 2.54E-03 1.93E-03 AP ONS-4 283976008 8/10/2011 BETA 3.70E-02 2.19E-03 1.92E-03 AP ONS-5 283976009 8/10/2011 BETA 2.90E-02 1.92E-03 1.85E-03 AP ONS-6 283976010 8/10/2011 BETA 4.26E-02 2.28E-03 1.83E-03 AP NBF 284443001 8/17/2011 BETA 3.50E-02 2.02E-03 1.60E-03 AP SBN 284443002 8/17/2011 BETA 3.45E-02 2.07E-03 1.69E-03

,AP DOW 284443003 8/17/2011 BETA 3.02E-02 1.98E-03 1.75E-03 AP COL 284443004 8/17/2011 BETA 3.OOE-02 1.92E-03 1.66E-03 AP ONS-1 284443005 8/17/2011 BETA 3.30E-02 2.08E-03 1.78E-03 AP ONS-2 284443006 8/17/2011 BETA 2.78E-02 1.91E-03 1.77E-03 AP ONS-3 284443007 8/17/2011 BETA 5.25E-02 2.63E-03 1.82E-03 AP ONS-4 284443008 8/17/2011 BETA 3.26E-02 2.08E-03 1.80E-03 D-18

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-5 284443009 8/17/2011 BETA 2.78E-02 1.93E-03 1.79E-03 AP ONS-6 284443010 8/17/2011 BETA 3.73E-02 2.12E-03 1.65E-03 AP NBF 290244001 9/28/2011 Ac-228 -4.20E-04 4.66E-04 1.26E-03 U AP NBF 290244001 9/28/2011 Ag-108m 8.79E-05 6.61 E-05 2.21E-04 U AP NBF 290244001 9/28/2011 Ag-110m 1.75E-05 8.50E-05 2.87E-04 U AP NBF 290244001 9/28/2011 Ba- 140 9.83E-03 2.59E-02 0.OOE+00 UI AP NBF 290244001 9/28/2011 Be-7 1.17E-01 .8.33E-03 7.28E-03 AP NBF 290244001 9/28/2011 Ce- 141 6.39E-04 8.68E-04 2.73E-03 U AP NBF 290244001 9/28/2011 Ce- 144 -2.61E-04 4.73E-04 1.48E-03 U AP NBF 290244001 9/28/2011 Co-57 7.08E-06 6.24E-05 2.03E-04 U AP NBF 290244001 9/28/2011 Co-58 3.77E-06 2.13E-04 6.98E-04 U AP NBF 290244001 9/28/2011 Co-60 1.40E-04 1.12E-04 3.80E-04 U AP NBF 290244001 9/28/2011 Cr-51 1.27E-02 8.25E-03 2.64E-02 U AP' NBF 290244001 9/28/2011 Cs-134 1.30E-04 1.1OE-04 3.72E-04 U AP NBF 290244001 9/28/2011 Cs-137 -1.59E-04 7.73E-05 1.92E-04 U AP NBF 290244001 9/28/2011 Fe-59 9.95E-04 8.05E-04 2.76E-03 U AP NBF 290244001 9/28/2011 1-131 2.05E-01 5.02E-01 0.OOE+00 UI AP NBF 290244001 9/28/2011 K-40 3.85E-03 1.58E-03 2.60E-03 UI AP NBF 290244001 9/28/2011 La-140 9.83E-03 2.59E-02 0.OOE+00 U1 AP NBF 290244001 9/28/2011 Mn-54 -1.75E-04 1.11 E-04 3.01E-04 U AP NBF 290244001 9/28/2011 Nb-95 3.55E-04 2.76E-04 9.20E-04 U AP NBF 290244001 9/28/2011 Ru-103 -3.14E-04 4.27E-04 1.33E-03 U AP NBF 290244001 9/28/2011 Ru- 106 -4.89E-04 8.70E-04 2.83E-03 U AP NBF 290244001 9/28/2011 Sb-124 5.93E-05 6.49E-04 2.14E-03 U AP NBF 290244001 9/28/2011 Sb-125 8.90E-05 2.1OE-04 7.07E-04 U AP NBF 290244001 9/28/2011 Se-75 -2.15E-04 1.70E-04 5.05E-04 U AP NBF 290244001 9/28/2011 Th-228 8.70E-05 1.39E-04 4.46E-04 U AP NBF 290244001 9/28/2011 Zn-65 4.75E-04 2.69E-04 8.28E-04 U AP NBF 290244001 9/28/2011 Zr-95 6.44E-04 4.40E-04 1.48E-03 U AP SBN 290244002 9/28/2011 Ac-228 2.18E-04 8.31E-04 2.59E-03 U AP SBN 290244002 9/28/2011 Ag-108m -8.90E-05 1.26E-04 4.03E-04 U AP SBN 290244002 9/28/2011 Ag-I 10m 5.80E-06 1.97E-04 6.37E-04 U AP SBN 290244002 9/28/2011 Ba- 140 -3.89E-02 4.99E-02 0.OOE+00 U AP SBN 290244002 9/28/2011 Be-7 1.35E-01 1.19E-02 1.46E-02 AP SBN 290244002 9/28/2011 Ce- 141 -1.32E-03 1.43E-03 4.35E-03 U AP SBN 290244002 9/28/2011 Ce- 144 -5.24E-04 6.63E-04 2.16E-03 U AP SBN 290244002 9/28/2011 Co-57 1.15E-04 9.25E-05 2.92E-04 U AP SBN 290244002 9/28/2011 Co-58 -5.33E-04 4.57E-04 1.38E-03 U AP SBN 290244002 9/28/2011 Co-60 1.68E-04 2.01E-04 6.88E-04 U AP SBN 290244002 9/28/2011 Cr-51 -2.37E-02 1.51E-02 4.25E-02 U AP SBN 290244002 9/28/2011 Cs-134 -1.48E-04 2.29E-04 7.30E-04 U AP SBN 290244002 9/28/2011 Cs-137 -2.53E-04 1.80E-04 5.07E-04 U AP SBN 290244002 9/28/2011 Fe-59 4.15E-04 1.63E-03 5.35E-03 U AP SBN 290244002 9/28/2011 1-131 -9.38E-02 9.13E-01 0.OOE+00 U AP SBN 290244002 9/28/2011 K-40 3.03E-03 3.41E-03 5.36E-03 U AP SBN 290244002 9/28/2011 La-140 -3.89E-02 4.99E-02 0.OOE+00 U AP SBN 290244002 9/28/2011 Mn-54 3.04E-04 2.02E-04 6.79E-04 U AP SBN 290244002 9/28/2011 Nb-95 -3.21E-04 5.50E-04 1.76E-03 U AP SBN 290244002 9/28/2011 Ru-103 1.29E-03 8.63E-04 2.83E-03 U AP SBN 290244002 9/28/2011 Ru-106 -1.37E-03 1.72E-03 5.27E-03 U AP SBN 290244002 9/28/2011 Sb-124 1.13E-03 1.20E-03 4.15E-03 U D-19

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP SBN 290244002 9/28/2011 Sb-125 3.95E-04 4.22E-04 1.42E-03 U AP SBN 290244002 9/28/2011 Se-75 -1.85E-04 2.94E-04 9.30E-04 U AP SBN 290244002 9/28/2011 Th-228 1.90E-04 2.59E-04 7.37E-04 U AP SBN 290244002 9/28/2011 Zn-65 -2.52E-04 5.86E-04 1.85E-03 U AP SBN 290244002 9/28/2011 Zr-95 2.01E-04 8.38E-04 2.83E-03 U AP DOW 290244003 9/28/2011 Ac-228 5.12E-04 8.1OE-04 1.68E-03 U AP DOW 290244003 9/28/2011 Ag-108m -9.95E-05 8.48E-05 2.51 E-04 U AP DOW 290244003 9/28/2011 Ag-Il0m 2.62E-04 1.31E-04 4.15E-04 U AP DOW 290244003 9/28/2011 Ba-140 1.89E-02 3.48E-02 0.OOE+00 UI AP DOW 290244003 9/28/2011 Be-7 1.36E-01 1.03E-02 9.11E-03 AP DOW 290244003 9/28/2011 Ce-141 5.66E-04 9.93E-04 3.35E-03 U AP DOW 290244003 9/28/2011 Ce-144 -2.01E-04 5.71E-04 1.91E-03 U AP DOW 290244003 9/28/2011 Co-57 6.1OE-06 7.80E-05 2.48E-04 U AP DOW 290244003 9/28/2011 Co-58 2.89E-04 2.59E-04 7.74E-04 U AP DOW 290244003 9/28/2011 Co-60 4.90E-05 1.32E-04 4.36E-04 U AP DOW 290244003 9/28/2011 Cr-51 -1.24E-03 8.68E-03 2.87E-02 U AP DOW 290244003 9/28/2011 Cs-134 1.17E-04 1.31E-04 4.42E-04 U AP DOW 290244003 9/28/2011 Cs-137 -1.80E-04 1.13E-04 3.15E-04 U AP DOW 290244003 9/28/201 1 Fe-59 1.11E-03 9.06E-04 3.10E-03 U AP DOW 290244003 9/28/2011 1-131 9.01E-01 7.OOE-01 0.OOE+00 Ul AP DOW 290244003 9/28/2011 K-40 1.45E-03 1.67E-03 5.99E-03 U AP DOW 290244003 9/28/2011 La-140 1.89E-02 3.48E-02 0.OOE+00 UI AP DOW 290244003 9/28/2011 Mn-54 1.O1E-04 1.20E-04 4.05E-04 U AP DOW 290244003 9/28/2011 Nb-95 2.72E-04 3.11 E-04 1.05E-03 U AP DOW 290244003 9/28/2011 Ru-103 -2.68E-04 4.92E-04 1.60E-03 U AP DOW 290244003 9/28/2011 Ru-106 1.40E-04 9.63E-04 3.17E-03 U AP DOW 290244003 9/28/2011 Sb-124 -2.35E-04 6.95E-04 2.20E-03 U AP DOW 290244003 9/28/2011 Sb-125 3.60E-04 2.73E-04 8.84E-04 U AP DOW 290244003 9/28/2011 Se-75 -1.44E-05 2.13E-04 6.79E-04 U AP DOW 290244003 9/28/2011 Th-228 -3.54E-04 2.02E-04 5.76E-04 U AP DOW 290244003 9/28/2011 Zn-65 -2.30E-04 3.35E-04 1.06E-03 U AP DOW 290244003 9/28/2011 Zr-95 -1.02E-03 5.93E-04 1.56E-03 U AP COL 290244004 9/28/2011 Ac-228 4.29E-04 3.42E-04 1.18E-03 U AP COL 290244004 9/28/2011 Ag-108m -9.03E-05 7.77E-05 2.28E-04 U AP COL 290244004 9/28/2011 Ag-Il0m -9.40E-05 8.33E-05 2.39E-04 U AP COL 290244004 9/28/2011 Ba- 140 3.74E-02 3.09E-02 0.OOE+00 UI AP COL 290244004 9/28/2011 Be-7 1.17E-01 9.02E-03 8.32E-03 AP COL 290244004 9/28/2011 Ce-141 7.02E-05 9.38E-04 2.98E-03 U AP COL 290244004 9/28/2011 Ce-144 2.80E-04 5.65E-04 1.88E-03 U AP COL 290244004 9/28/2011 Co-57 -5.79E-05 6.74E-05 2.12E-04 U AP COL 290244004 9/28/2011 Co-58 8.31E-06 2.28E-04 7.53E-04 U AP COL 290244004 9/28/2011 Co-60 2.19E-05 8.67E-05 2.95E-04 U AP COL 290244004 9/28/2011 Cr-51 -6.24E-03 8.18E-03 2.59E-02 U AP COL 290244004 9/28/2011 Cs-134 -1.01E-04 1.23E-04 3.74E-04 U AP COL 290244004 9/28/2011 Cs-137 -3.04E-05 7.45E-05 2.39E-04 U AP COL 290244004 9/28/2011 Fe-59 9.65E-04 8.93E-04 3.14E-03 U AP COL 290244004 9/28/2011 1-131 -3.01E-01 6.39E-01 0.OOE+00 U AP COL 290244004 9/28/2011 K-40 6.61 E-04 1.38E-03 4.61E&03 U AP COL 290244004 9/28/2011 La-140 3.74E-02 3.08E-02 0.OOE+00 UI AP COL 290244004 9/28/2011 Mn-54 -9.04E-05 1.02E-04 3.02E-04 U AP COL 290244004 9/28/2011 Nb-95 4.83E-05 2.28E-04 7.66E-04 U D-20

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP COL 290244004 9/28/2011 Ru-103 -3.46E-04 4.34E-04 1.30E-03 U AP COL 290244004 9/28/2011 Ru-I106 7.37E-04 9.55E-04 3.30E-03 U AP COL 290244004 9/28/2011 Sb-124 2.76E-04 6.56E-04 2.30E-03 U AP COL 290244004 9/28/2011 Sb-125 3.67E-04 2.61E-04 8.73E-04 U AP COL 290244004 9/28/2011 Se-75 -2.51E-05 1.74E-04 5.84E-04 U AP COL 290244004 9/28/2011 Th-228 -1.15E-04 1.66E-04 5.06E-04 U AP COL 290244004 9/28/2011 Zn-65 -3.01E-04 3.02E-04 7.1OE-04 U AP COL 290244004 9/28/2011 Zr-95 3.46E-04 4.08E-04 1.42E-03 U AP ONS-I 290244005 9/28/2011 Ac-228 7.41E-04 3.73E-04 1.26E-03 1i AP ONS-I 290244005 9/28/2011 Ag-108m -5.50E-05 5.92E-05 1.78E-04 U AP ONS-1 290244005 9/28/2011 Ag-Il0m -8.72E-05 1.03E-04 2.68E-04 U AP ONS-1 290244005 9/28/2011 Ba-140 1.23E-02 3.05E-02 0.OOE+00 UI AP ONS-I 290244005 9/28/2011 Be-7 1.13E-01 8.78E-03 7.97E-03 AP ONS-1 290244005 9/28/2011 Ce-141 -3.97E-04 8.17E-04 2.45E-03 U AP ONS-1 290244005 9/28/2011 Ce-144 -1.68E-04 4.34E-04 1.39E-03 U AP ONS-1 290244005 9/28/2011 Co-57 7.25E-05 5.63E-05 1.86E-04 U AP ONS-1 290244005 9/28/2011 Co-58 4.52E-05 1.85E-04 6.29E-04 U AP ONS-1 290244005 9/28/2011 Co-60 3.5 1E-06 7.38E-05 2.49E-04 U AP ONS-1 290244005 9/28/2011 Cr-51 6.64E-04 7.15E-03 2.41 E-02 U AP ONS-1 290244005 9/28/2011 Cs-134 -1.04E-04 1.04E-04 3.08E-04 U AP ONS-1 290244005 9/28/2011 Cs-137 8.59E-05 1.01E-04 2.36E-04 U AP ONS-1 290244005 9/28/2011 Fe-59 1.35E-03 7.78E-04 2.71E-03 U AP ONS-I 290244005 9/28/2011 1-131 -5.62E-01 5.67E-01 0.OOE+00 U AP ONS-1 290244005 9/28/2011 K-40 -7.53E-04 1.14E-03 3.91 E-03 U AP ONS-1 290244005 9/28/2011 La-140 1.23E-02 3.05E-02 0.OOE+00 UI AP ONS-1 290244005 9/28/2011 Mn-54 3.46E-05 9.58E-05 3.26E-04 U AP ONS-I 290244005 9/28/2011 Nb-95 3.10E-04 2.33E-04 8.14E-04 U AP ONS-1 290244005 9/28/2011 Ru-103 5.25E-04 3.88E-04 1.32E-03 U AP ONS-I 290244005 9/28/2011 Ru-106 5.08E-04 8.77E-04 2.91E-03 U AP ONS-I 290244005 9/28/2011 Sb-124 5.13E-04 5.36E-04 1.98E-03 U AP ONS-1 290244005 9/28/2011 Sb-125 6.60E-05 1.93E-04 6.46E-04 U AP ONS-1 290244005 9/28/2011 Se-75 -1.60E-04 1.56E-04 4.92E-04 U AP ONS-1 290244005 9/28/2011 Th-228 8.92E-05 1.45E-04 4.66E-04 U AP ONS-1 290244005 9/28/2011 Zn-65 -1.59E-04 2.43E-04 7.24E-04 U AP ONS-1 290244005 9/28/2011 Zr-95 -3.50E-04 3.51E-04 1.03E-03 U AP ONS-2 290244006 9/28/2011 Ac-228 -2.57E-04 3.24E-04 9.07E-04 U AP ONS-2 290244006 9/28/2011 Ag-108m 1.38E-05 5.78E-05 1.97E-04 U AP ONS-2 290244006 9/28/2011 Ag- I 10m 6.82E-05 8.90E-05 3.05E-04 U AP ONS-2 290244006 9/28/2011 Ba-140 -1.12E-02 3.10E-02 0.OOE+00 U AP ONS-2 290244006 9/28/2011 Be-7 1.12E-01 8.61E-03 6.95E-03 AP ONS-2 290244006 9/28/2011 Ce- 141 3.18E-04 7.05E-04 2.35E-03 U AP ONS-2 290244006 9/28/2011 Ce-144 5.52E-04 4.11 E-04 1.37E-03 U AP ONS-2 290244006 9/28/2011 Co-57 -6.91E-06 5.06E-05 1.69E-04 U AP ONS-2 290244006 9/28/2011 Co-58 5.49E-05 1.77E-04 5.91E-04 U AP ONS-2 290244006 9/28/2011 Co-60 -1.15E-04 1.02E-04 2.86E-04 U AP ONS-2 290244006 9/28/2011 Cr-51 5.40E-03 6.73E-03 2.23E-02 U AP ONS-2 290244006 9/28/2011 Cs-134 -4.28E-05 1.08E-04 3.37E-04 U AP ONS-2 290244006 9/28/2011 Cs-137 -5.32E-05 7.33E-05 2.23E-04 U AP ONS-2 290244006 9/28/2011 Fe-59 6.99E-05 6.86E-04 2.3 1E-03 U AP ONS-2 290244006 9/28/2011 1-131 -6.61E-01 6.26E-01 0.OOE+00 U AP ONS-2 290244006 9/28/2011 K-40 -7.42E-04 1.13E-03 3.56E-03 U D-21

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-2 290244006 9/28/2011 La-140 -1.12E-02 3.10E-02 0.OOE+00 U AP ONS-2 290244006 9/28/2011 Mn-54 1.44E-04 9.93E-05 3.41E-04 U AP ONS-2 290244006 9/28/2011 Nb-95 -5.56E-05 2.24E-04 6.92E-04 U AP ONS-2 290244006 9/28/2011 Ru- 103 -4.71E-04 4.03E-04 1.19E-03 U AP ONS-2 290244006 9/28/2011 Ru-I106 -1.01E-03 8.54E-04 2.39E-03 U AP ONS-2 290244006 9/28/2011 Sb-124 5.02E-04 4.08E-04 1.60E-03 U AP ONS-2 290244006 9/28/2011 Sb-125 1.38E-04 1.87E-04 6.44E-04 U AP ONS-2 290244006 9/28/2011 Se-75 2.16E-04 1.46E-04 4.78E-04 U AP ONS-2 290244006 9/28/2011 Th-228 -9.73E-05 1.19E-04 3.72E-04 U AP ONS-2 290244006 9/28/2011 Zn-65 -2.67E-04 2.45E-04 7.02E-04 U AP ONS-2 290244006 9/28/2011 Zr-95 2.12E-05 4.35E-04 1.43E-03 U AP ONS-3 290244007 9/28/2011 Ac-228 -7.18E-04 3.73E-04 9.54E-04 U AP ONS-3 290244007 9/28/2011 Ag-108m 1.O1E-04 6.80E-05 2.32E-04 U AP ONS-3 290244007 9/28/2011 Ag-Il0m -1.57E-05 1.0 1E-04 3.22E-04 U AP ONS-3 290244007 9/28/2011 Ba-140 8.84E-03 2.97E-02 0.OOE+00 U1 AP ONS-3 290244007 9/28/2011 Be-7 2.01E-01 1.32E-02 7.22E-03 AP ONS-3 290244007 9/28/2011 Ce-141 -6.76E-04 6.91E-04 2.14E-03 U AP ONS-3 290244007 9/28/2011 Ce- 144 -3.24E-04 4.07E-04 1.29E-03 U AP ONS-3 290244007 9/28/2011 Co-57 5.43E-06 5.33E-05 1.80E-04 U AP ONS-3 290244007 9/28/2011 Co-58 -3.05E-04 2.39E-04 6.86E-04 U AP ONS-3 290244007 9/28/2011 Co-60 7.39E-05 1.00E-04 3.47E-04 U AP ONS-3 290244007 9/28/2011 Cr-51 1.24E-03 7.18E-03 2.46E-02 U AP ONS-3 290244007 9/28/2011 Cs-134 1.31E-05 9.18E-05 3.12E-04 U AP ONS-3 290244007 9/28/2011 Cs-137 1.88E-05 8.11 E-05 2.67E-04 U AP ONS-3 290244007 9/28/2011 Fe-59 1.49E-03 8.89E-04 3.13E-03 U AP ONS-3 290244007 9/28/2011 1-131 6.55E-01 5.77E-01 0.OOE+00 UI AP ONS-3 290244007 9/28/2011 K-40 3.58E-03 1.33E-03 2.62E-03 UI AP ONS-3 290244007 9/28/2011 La-140 8.84E-03 2.97E-02 0.OOE+00 UI AP ONS-3 290244007 9/28/2011 Mn-54 -8.39E-05 9.06E-05 2.70E-04 U AP ONS-3 290244007 9/28/2011 Nb-95 1.93E-04 2.53E-04 8.85E-04 U AP ONS-3 290244007 9/28/2011 Ru-103 -1.83E-04 4.22E-04 1.34E-03 U AP ONS-3 290244007 9/28/2011 Ru-106 6.69E-04 9.40E-04 3.15E-03 U AP ONS-3 290244007 9/28/2011 Sb-124 -1.79E-04 6. I OE-04 1.92E-03 U AP ONS-3 290244007 9/28/2011 Sb-125 -1.62E-04 2.04E-04 6.37E-04 U AP ONS-3 290244007 9/28/2011 Se-75 2.48E-05 1.62E-04 5.25E-04 U AP ONS-3 290244007 9/28/2011 Th-228 2.05E-04 1.69E-04 4.75E-04 U AP ONS-3 290244007 9/28/2011 Zn-65 -1.95E-04 2.56E-04 7.57E-04 U AP ONS-3 290244007 9/28/2011 Zr-95 -2.76E-04 3.15E-04 9.42E-04 U AP ONS-4 290244008 9/28/2011 Ac-228 -9.02E-06 4.22E-04 1.39E-03 U AP ONS-4 290244008 9/28/2011 Ag-108m 6.49E-05 6.43E-05 2.17E-04 U AP ONS-4 290244008 9/28/2011 Ag-I l0m -1.23E-04 1.02E-04 3.OOE-04 U AP ONS-4 290244008 9/28/2011 Ba- 140 4.96E-02 2.95E-02 0.OOE+00 UI AP ONS-4 290244008 9/28/2011 Be-7 1.05E-01 8.37E-03 7.46E-03 AP ONS-4 290244008 9/28/2011 Ce- 141 7.30E-04 7.88E-04 2.56E-03 U AP ONS-4 290244008 9/28/2011 Ce-I144 -2.60E-04 4.27E-04 1.32E-03 U AP ONS-4 290244008 9/28/2011 Co-57 4.65E-06 5.39E-05 1.75E-04 U AP ONS-4 290244008 9/28/2011 Co-58 1.98E-05 2.21E-04 7.39E-04 U AP ONS-4 290244008 9/28/2011 Co-60 9.75E-05 1.06E-04 3.75E-04 U AP ONS-4 290244008 9/28/2011 Cr-51 -1.26E-02 8.62E-03 2.50E-02 U AP ONS-4 290244008 9/28/2011 Cs-134 9.70E-05 9.94E-05 3.48E-04 U AP ONS-4 290244008 9/28/2011 Cs-137 -3.66E-06 8.3 1E-05 2.79E-04 U D-22

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-4 290244008 9/28/2011 Fe-59 2.73E-04 8.81E-04 2.94E-03 U AP ONS-4 290244008 9/28/2011 1-131 1.67E-01 5.87E-01 0.00E+00 UI AP ONS-4 290244008 9/28/2011 K-40 8.99E-04 1.64E-03 3.34E-03 U AP ONS-4 290244008 9/28/2011 La-140 4.96E-02 2.94E-02 0.00,E+00 UI AP ONS-4 290244008 9/28/2011 Mn-54 2.93E-05 1.07E-04 3.61E-04 U AP ONS-4 290244008 9/28/2011 Nb-95 1.49E-04 2.47E-04 8.50E-04 U AP ONS-4 290244008 9/28/2011 Ru-103 -8.01E-05 4.83E-04 1.55E-03 U AP ONS-4 290244008 9/28/2011 Ru-106 -4.51E-04 8.39E-04 2.54E-03 U AP ONS-4 290244008 9/28/2011 Sb-124 3.30E-04 5.86E-04 2.07E-03 U AP ONS-4 290244008 9/28/2011 Sb-125 2.79E-04 2.15E-04 7.25E-04 U AP ONS-4 290244008 9/28/2011 Se-75 1.09E-04 1.55E-04 5.30E-04 U AP ONS-4 290244008 9/28/2011 Th-228 -7.20E-05 1.35E-04 4.45E-04 U AP ONS-4 290244008 9/28/2011 Zn-65 -3.01E-04 2.5 11E-04 6.75E-04 U AP ONS-4 290244008 9/28/2011 Zr-95 9.20E-05 4.21E-04 1.43E-03 U AP ONS-5 290244009 9/28/2011 Ac-228 1.01E-04 4.11E-04 1.30E-03 U AP ONS-5 290244009 9/28/2011 Ag-108m 4.29E-06 6.34E-05 2.11E-04 U AP ONS-5 290244009 9/28/2011 Ag-Il0m -5.35E-05 9.45E-05 2.56E-04 U AP ONS-5 290244009 9/28/2011 Ba- 140 6.42E-03 2.80E-02 0.00E+00 U' AP ONS-5 290244009 9/28/2011 Be-7 1.16E-01 9.37E-03 7.38E-03 AP ONS-5 290244009 9/28/2011 Ce- 141 -5.26E-04 7.01E-04 2.23E-03 U AP ONS-5 290244009. 9 /28/2011 Ce-144 2.50E-04 3.69E-04 1.26E-03 U AP ONS-5 290244009 9/28/2011 Co-57 -5.35E-05 4.54E-05 1.39E-04 U AP ONS-5 290244009 9/28/2011 Co-58 1.52E-04 2.34E-04 8.04E-04 U AP ONS-5 290244009 9/28/2011 Co-60 5.12E-05 9.79E-05 3.41E-04 U AP ONS-5 290244009 9/28/2011 Cr-51 4.58E-04 7.23E-03 2.46E-02 U AP ONS-5 290244009 9/28/2011 Cs-134 1.06E-05 1.16E-04 3.88E-04 U AP ONS-5 290244009 9/28/2011 Cs-137 1.44E-05 1.40E-04 2.77E-04 U AP ONS-5 290244009 9/28/2011 Fe-59 -1.50E-04 8.79E-04 2.78E-03 U AP ONS-5 290244009 9/28/2011 1-131 1.86E-01 5.74E-01 0.00E+00 U' AP ONS-5 290244009 9/28/2011 K-40 -3.86E-04 1.27E-03 4.41E-03 U AP ONS-5 290244009 9/28/2011 La-140 6.42E-03 2.80E-02 0.OOE+00 U' AP ONS-5 290244009 9/28/2011 Mn-54 -2.08E-05 1.09E-04 3.55E-04 U AP ONS-5 290244009 9/28/2011 Nb-95 7.67E-06 2.60E-04 8.71E-04 U AP ONS-5 290244009 9/28/2011 Ru-103 -1.60E-04 4.22E-04 1.34E-03 U AP ONS-5 290244009 9/28/2011 Ru-106 3.95E-04 8.18E-04 2.71E-03 U AP ONS-5 290244009 9/28/2011 Sb-124 -4.72E-04 6.69E-04 1.87E-03 U AP ONS-5 290244009 9/28/2011 Sb-125 2.83E-04 2.27E-04 7.71E-04 U AP ONS-5 290244009 9/28/2011 Se-75 -8.12E-05 1.71E-04 5.33E-04 U AP ONS-5 290244009 9/28/2011 Th-228 1.34E-05 1.41E-04 4.39E-04 U AP ONS-5 290244009 9/28/2011 Zn-65 -5.51E-04 3.30E-04 7.86E-04 U AP ONS-5 290244009 9/28/2011 Zr-95 9.55E-05 4.26E-04 1.45E-03 U AP ONS-6 290244010 9/28/2011 Ac-228 -5.53E-04 4.3 1E-04 1.2913-03 U AP ONS-6 290244010 9/28/2011 Ag-108m 1.10E-04 7.27E-05 2.45E-04 U AP ONS-6 290244010 9/28/2011 Ag-il0m 2.14E-04 1.14E-04 3.80E-04 U AP ONS-6 290244010 9/28/2011 Ba-140 3.14E-02 3.48E-02 0.00E+00 UI AP ONS-6 290244010 9/28/2011 Be-7 1.27E-01 9.25E-03 8.91E-03 AP ONS-6 290244010 9/28/2011 Ce- 141 8.90E-05 8.29E-04 2.78E-03 U AP ONS-6 290244010 9/28/2011 Ce-I144 -6.44E-04 4.75E-04 1.43E-03 U AP ONS-6 290244010 9/28/2011 Co-57 -7.92E-05 6.15E-05 1.88E-04 U AP ONS-6 290244010 9/28/2011 Co-58 2.60E-04 2.41E-04 8.13E-04 U AP ONS-6 290244010 9/28/2011 Co-60 2.17E-04 1.13E-04 3.94E-04 U D-23

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-6 290244010 9/28/2011 Cr-51 -1.12E-02 9.26E-03 2.70E-02 U AP ONS-6 290244010 9/28/2011 Cs-134 6.18E-05 1.10E-04 3.68E-04 U AP ONS-6 290244010 9/28/2011 Cs-137 -1 .27E-04 9.59E-05 2.69E-04 U AP ONS-6 290244010 9/28/2011 Fe-59 -I.11E-03 8.65E-04 2.39E-03 U AP ONS-6 290244010 9/28/2011 1-131 -5.26E-01 5.85E-01 0.OOE+00 U AP ONS-6 290244010 9/28/2011 K-40 1.29E-03 1.78E-03 2.48E-03 U AP ONS-6 290244010 9/28/2011 La-140 3.14E-02 3.48E-02 0.OOE+00 UI AP ONS-6 290244010 9/28/2011 Mn-54 -5.84E-05 1.23E-04 3.98E-04 U AP ONS-6 290244010 9/28/2011 Nb-95 3.56E-04 2.91 E-04 9.73E-04 U AP ONS-6 290244010 9/28/2011 Ru-103 -7.48E-04 4.84E-04 1.35E-03 U AP ONS-6 290244010 9/28/2011 Ru-106 -4.45E-04 9.96E-04 3.16E-03 U AP ONS-6 290244010 9/28/2011 Sb-124 1.40E-03 7.65E-04 2.77E-03 U AP ONS-6 290244010 9/28/2011 Sb-125 -1.75E-04 2.23E-04 7.06E-04 U AP ONS-6 290244010 9/28/2011 Se-75 -5.64E-05 1.81E-04 5.78E-04 U AP ONS-6 290244010 9/28/2011 Th-228 2.11E-04 1.65E-04 5.43E-04 U AP ONS-6 290244010 9/28/2011 Zn-65 1.48E-04 3.07E-04 1.04E-03 U AP ONS-6 290244010 9/28/2011 Zr-95 -4.73E-04 4.72E-04 1.37E-03 U AP NBF 284846001 8/24/2011 BETA 4.90E-02 2.38E-03 1.60E-03 AP SBN 284846002 8/24/2011 BETA 4.79E-02 2.42E-03 1.70E-03 AP DOW 284846003 8/24/2011 BETA 4.83E-02 2.45E-03 1.72E-03 AP COL 284846004 8/24/2011 BETA 4.83E-02 2.43E-03 1.69E-03 AP ONS-1 284846005 8/24/2011 BETA 5.01E-02 2.46E-03 1.67E-03 AP ONS-2 284846006 8/24/2011 BETA 4.65E-02 2.39E-03 1.69E-03 AP ONS-3 284846007 8/24/2011 BETA 6.86E-02 3.01E-03 1.84E-03 AP ONS-4 284846008 8/24/2011 BETA 3.94E-02 2.19E-03 1.68E-03 AP ONS-5 284846009 8/24/2011 BETA 4.06E-02 2.25E-03 1.71E-03 AP ONS-6 284846010 8/24/2011 BETA 4.42E-02 2.32E-03 1.69E-03 AP NBF 285176001 8/31/2011 BETA 3.56E-02 2.04E-03 1.60E-03 AP SBN 285176002 8/31/2011 BETA 3.73E-02 2.14E-03 1.68E-03 AP DOW 285176003 8/31/2011 BETA 3.46E-02 2.06E-03 1.68E-03 AP COL 285176004 8/31/2011 BETA 3.31E-02 2.01E-03 1.67E-03 AP ONS-1 285176005 8/31/2011 BETA 3.80E-02 2.13E-03 1.63E-03 AP ONS-2 285176006 8/31/2011 BETA 3.36E-02 2.02E-03 1.66E-03 AP ONS-3 285176007 8/31/2011 BETA 5.10E-02 2.51E-03 1.71E-03 AP ONS-4 285176008 8/31/2011 BETA 2.89E-02 1.89E-03 1.67E-03 AP ONS-5 285176009 8/31/2011 BETA 3.68E-02 2.52E-03 2.33E-03 AP ONS-6 285176010 8/31/2011 BETA 3.75E-02 2.11E-03 1.64E-03 AP NBF 285555001 9/7/2011 BETA 5.91E-02 2.63E-03 1.82E-03 AP SBN 285555002 9/7/2011 BETA 6.60E-02 2.86E-03 1.92E-03 AP DOW 285555003 9/7/2011 BETA 6.28E-02 2.79E-03 1.92E-03 AP COL 285555004 9/7/2011 BETA 6.61E-02 2.86E-03 1.92E-03 AP ONS-1 285555005 9/7/2011 BETA 5.83E-02 2.65E-03 1.87E-03 AP ONS-2 285555006 9/7/2011 BETA 5.27E-02 2.56E-03 1.92E-03 AP ONS-3 285555007 9/7/2011 BETA 8.88E-02 3.38E-03 2.OOE-03 AP ONS-4 285555008 9/7/2011 BETA 5.02E-02 2.50E-03 1.92E-03 AP ONS-5 285555009 9/7/2011 BETA 4.95E-02 2.51E-03 1.96E-03 AP ONS-6 285555010 9/7/2011 BETA 5.82E-02 2.80E-03 2.09E-03 AP NBF 286154001 9/14/2011 BETA 3.47E-02 3.44E-03 1.98E-03 AP SBN 286154002 9/14/2011 BETA 2.90E-02 3.22E-03 2.06E-03 AP DOW 286154003 9/14/2011 BETA 3.27E-02 3.43E-03 2.08E-03 AP COL 286154004 9/14/2011 BETA 3.87E-02 3.71E-03 2.07E-03 D-24

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-1 286154005 9/14/2011 BETA 3.33E-02 3.41E-03 2.03E-03 AP ONS-2 286154006 9/14/2011 BETA 4.11E-02 3.81E-03 2.06E-03 AP ONS-3 286154007 9/14/2011 BETA 5.70E-02 2.71E-03 1.29E-03 AP ONS-4 286154008 9/14/2011 BETA 3.16E-02 3.35E-03 2.06E-03 AP ONS-5 286154009 9/14/2011 BETA 4.11E-02 3.77E-03 2.02E-03 AP ONS-6 286154010 9/14/2011 BETA 3.35E-02 3.48E-03 2.09E-03 AP NBF 286489001 9/21/2011 BETA 2.99E-02 1.85E-03 1.14E-03 AP SBN 286489002 9/21/2011 BETA 3.02E-02 1.91E-03 1.21E-03 AP DOW 286489003 9/21/2011 BETA 3.46E-02 2.06E-03 1.22E-03 AP COL 286489004 9/21/2011 BETA 2.99E-02 1.90E-03 1.21E-03 AP ONS-1 286489005 9/21/2011 BETA 3.73E-02 2.10E-03 1.19E-03 AP ONS-2 286489006 9/21/2011 BETA 3.03E-02. 1.92E-03 1.22E-03 AP ONS-3 286489007 9/21/2011 BETA 5.36E-02 2.63E-03 1.29E-03 AP ONS-4 286489008 9/21/2011 BETA 2.60E-02 1.78E-03 1.22E-03 AP ONS-5 286489009 9/21/2011 BETA 3.12E-02 1.95E-03 1.22E-03 AP ONS-6 286489010 9/21/2011 BETA 5.44E-02 3.37E-03 2.09E-03 AP NBF 286954001 9/28/2011 BETA 3.06E-02 1.90E-03 1.19E-03 AP SBN 286954002 9/28/2011 BETA 3.48E-02 2.12E-03 1.30E-03 AP DOW 286954003 9/28/2011 BETA 3.60E-02 2.10E-03 1.23E-03 AP COL 286954004 9/28/2011 BETA 3.86E-02 2.40E-03 1.50E-03 AP ONS-1 286954005 9/28/2011 BETA 3.55E-02 2.15E-03 1.31E-03 AP ONS-2 286954006 9/28/2011 BETA 2.72E-02 1.88E-03 1.30E-03 AP ONS-3 286954007 9/28/2011 BETA 5.87E-02 2.75E-03 1.28E-03 AP ONS-4 286954008 9/28/2011 BETA 3.39E-02 2.09E-03 1.30E-03 AP ONS-5 286954009 9/28/2011 BETA 2.86E-02 1.88E-03 1.23E-03 AP ONS-6 286954010 9/28/2011 BETA 3.41E-02 1.70E-03 8.47E-04 AP NBF 287655001 10/5/2011 BETA 2.53E-02 1.75E-03 1.15E-03 AP SBN 287655002 10/5/2011 BETA 2.26E-02 1.67E-03 1.17E-03 AP DOW 287655003 10/5/2011 BETA 2.62E-02 1.79E-03 1.16E-03 AP COL 287655004 10/5/2011 BETA 1.98E-02 1.43E-03 9.80E-04 AP ONS-1 287655005 10/5/2011 BETA 2.53E-02 1.76E-03 1.17E-03 AP ONS-2 287655006 10/5/2011 BETA 2.19E-02 1.65E-03 1.18E-03 AP ONS-3 287655007 10/5/2011 BETA 4.29E-02 2.30E-03 1.18E-03.

AP ONS-4 287655008 10/5/2011 BETA 2.45E-02 1.75E-03 1.18E-03 AP ONS-5 287655009 10/5/2011 BETA 3.29E-02 4.32E-03 5.OOE-03 AP ONS-6 287655010 10/5/2011 BETA 2.72E-02 1.79E-03 1.12E-03 AP NBF 288123001 10/12/2011 BETA 9.39E-02 3.37E-03 1.11E-03 AP SBN 288123002 10/12/2011 BETA 9.OOE-02 3.35E-03 1.15E-03 AP DOW 288123003 10/12/2011 BETA 9.40E-02 3.44E-03 1.16E-03 AP COL 288123004 10/12/2011 BETA 8.80E-02 3.29E-03 1.i4E-03 AP ONS-1 288123005 10/12/2011 BETA 9.15E-02 3.37E-03 1.15E-03 AP ONS-2 288123006 10/12/2011 BETA 9.01E-02 3.36E-03 1.16E-03 AP ONS-3 288123007 10/12/2011 BETA 1.46E-01 4.37E-03 1.16E-03 AP ONS-4 288123008 10/12/2011 BETA 6.55E-02 2.85E-03 1.17E-03 AP ONS-5 288123009 10/12/2011 BETA 8.07E-02 5.53E-03 3.60E-03 AP ONS-6 288123010 10/12/2011 BETA 9.66E-02 3.46E-03 1.14E-03 AP NBF 288553001 10/19/2011 BETA 5.41E-02 2.56E-03 1.04E-03 AP SBN 288553002 10/19/2011 BETA 5.29E-02 2.57E-03 1.07E-03 AP DOW 288553003 10/19/2011 BETA 5.31 E-02 2.58E-03 1.07E-03 AP COL 288553004 10/19/2011 BETA 3.86E-02 2.16E-03 1.04E-03 AP ONS-1 288553005 10/19/2011 BETA 4.58E-02 2.37E-03 1.05E-03 D-25

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-2 288553006 10/19/2011 BETA 4.56E-02 2.39E-03 1.08E-03 AP ONS-3 288553007 10/19/2011 BETA 6.75E-02 2.89E-03 1.05E-03 AP ONS-4 288553008 10/19/2011 BETA 4.12E-02 2.32E-03 1.12E-03 AP ONS-5 288553009 10/19/2011 BETA 3.90E-02 2.56E-03 1.45E-03 AP ONS-6 288553010 10/19/2011 BETA 4.24E-02 2.28E-03 1.06E-03 AP NBF 289108001 10/26/2011 BETA 3.48E-02 1.99E-03 1.34E-03 AP SBN 289108002 10/26/2011 BETA 2.86E-02 1.87E-03 1.43E-03 AP DOW 289108003 10/26/2011 BETA 2.95E-02 1.86E-03 1.37E-03 AP COL 289108004 10/26/2011 BETA 2.78E-02 1.83E-03 1.41E-03 AP ONS-I 289108005 10/26/2011 BETA 3.30E-02 2.03E-03 1.47E-03 AP ONS-2 289108006 10/26/2011 BETA 3.48E-02 2.111E-03 1.50E-03 AP ONS-3 289108007 10/26/2011 BETA 5.25E-02 2.54E-03 1.44E-03 AP ONS-4 289108008 10/26/2011 BETA 3.53E-02 2.09E-03 1.46E-03 AP ONS-5 289108009 10/26/2011 BETA 3.28E-02 2.17E-03 1.67E-03 AP ONS-6 289108010 10/26/2011 BETA 3.57E-02 2.111E-03 1.46E-03 AP NBF 289618001 11/2/2011 BETA 3.79E-02 2.13E-03 1.70E-03 AP SBN 289618002 11/2/2011 BETA 3.94E-02 2.24E-03 1.81E-03 AP DOW 289618003 11/2/2011 BETA 4.05E-02 2.22E-03 1.73E-03 AP COL 289618004 11/2/2011 BETA 3.66E-02 2.17E-03 1.81E-03 AP ONS-1 289618005 11/2/2011 BETA 4.26E-02 2.31E-03 1.77E-03 AP ONS-2 289618006 11/2/2011 BETA 4.20E-02 2.30E-03 1.79E-03 AP ONS-3 289618007 11/2/2011 BETA 5.97E-02 2.74E-03 1.78E-03 AP ONS-4 289618008 11/2/2011 BETA 3.84E-02 2.2 11E-03 1.80E-03 AP ONS-5 289618009 11/2/2011 BETA 3.62E-02 2.12E-03 1.75E-03 AP ONS-6 289618010 11/2/2011 BETA 4.03E-02 2.25E-03' 1.78E-03 AP NBF 290101001 11/9/2011 BETA 4.44E-02 2.31E-03 1.17E-03 AP SBN 290101002 11/9/2011 BETA 4.59E-02 2.36E-03 1.18E-03 AP DOW 290101003 11/9/2011 BETA 4.51 E-02 2.30E-03 1. 14E-03 AP COL 290101004 11/9/2011 BETA 4.04E-02 2.20E-03 1.171E-03 AP ONS-1 290101005 11/9/2011 BETA 4.09E-02 2.24E-03 1.20E-03 AP ONS-2 290101006 11/9/2011 BETA 3.74E-02 2.15E-03 1.20E-03 AP ONS-3 290101007 11/9/2011 BETA 7.92E-02 3.10E-03 1.16E-03 AP ONS-4 290101008 11/9/2011 BETA 3.82E-02 2.14E-03 1.17E-03 AP ONS-5 290101009 11/9/2011 BETA 3.96E-02 2.17E-03 1.16E-03 AP ONS-6 290101010 11/9/2011 BETA 4.67E-02 2.36E-03 1.17E-03 AP NBF 290614001 11/16/2011 BETA 5.13E-02 2.45E-03 1.65E-03 AP SBN 290614002 11/16/2011 BETA 5.12E-02 2.53E-03 1.77E-03 AP DOW 290614003 11/16/2011 BETA 4.11E-02 2.09E-03 1.50E-03 AP COL 290614004 11/16/2011 BETA 5.20E-02 2.55E-03 1.76E-03 AP ONS-1 290614005 11/16/2011 BETA 5.50E-02 2.62E-03 1.76E-03 AP ONS-2 290614006 11/16/2011 BETA 5.06E-02 2.57E-03 1.85E-03 AP ONS-3 290614007 11/16/2611 BETA 9.37E-02 3.44E-03 1.75E-03 AP ONS-4 290614008 11/16/2011 BETA 4.71E-&02 2.44E-03 1.78E-03 AP ONS-5 290614009 11/16/2011 BETA 4.70E-02 2.42E-03 1.75E-03 AP ONS-6 290614010 11/16/2011 BETA 5.50E-02 2.64E-03 1.79E-03 AP NBF 295619001 12/28/2011 Ac-228 -4.211E-05 3.59E-04 1.10E-03 U AP NBF 295619001 12/28/2011 Ag-108m -1.68E-05 6.28E-05 1.99E-04 U AP NBF 295619001 12/28/2011 Ag-110m 2.49E-05 9.70E-05 2.87E-04 U AP NBF 295619001 12/28/2011 Ba- 140 -5.16E-03 1.30E-02 3.95E-02 U AP NBF 295619001 12/28/2011 Be-7 1.16E-01 8.43E-03 6.61E-03 AP NBF 295619001 12/28/2011 Ce-141 9.68E-04 5.77E-04 1.83E-03 U D-26

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP NBF 295619001 12/28/2011 Ce- 144 -4.74E-06 3.84E-04 1.24E-03 AP NBF 295619001 12/28/2011 Co-57 1.72E-05 5.14E-05 1.68E-04 AP NBF 295619001 12/28/2011 Co-58 6.58E-05 1.59E-04 5.36E-04 AP NBF 295619001 12/28/2011 Co-60 1.03E-04 9.71E-05 3.44E-04 AP NBF 295619001 12/28/2011 Cr-51 1.98E-03 4.78E-03 1.60E-02 AP NBF 295619001 12/28/2011 Cs-134 1.60E-04 1.11E-04 3.80E-04 AP NBF 295619001 12/28/2011 Cs-137 2.42E-04 1.21E-04 2.57E-04 AP NBF 295619001 12/28/2011 Fe-59 -9.93E-04 6.89E-04 1.83E-03 AP NBF 295619001 12/28/2011 1-131 2.46E-01 1.42E-01 0.OOE+00 AP NBF 295619001 12/28/2011 K-40 -1.39E-03 1.37E-03 4.OOE-03 AP NBF 295619001 12/28/2011 La-140 -5.16E-03 1.30E-02 3.95E-02 AP NBF 295619001 12/28/2011 Mn-54 8.OOE-05 9.92E-05 3.38E-04 AP NBF 295619001 12/28/2011 Nb-95 1.84E-04 2.15E-04 7.33E-04 AP NBF 295619001 12/28/2011 Ru-103 -5.14E-05 3.08E-04 9.74E-04 AP NBF 295619001 12/28/2011 Ru-106 -3.27E-04 7.36E-04 2.36E-03 AP NBF 295619001 12/28/2011 Sb-124 4.80E-04 5.26E-04 1.92E-03 AP NBF 295619001 12/28/2011 Sb-125 2.59E-04 2.08E-04 6.96E-04 AP NBF 295619001 12/28/2011 Se-75 1.41E-04 1.44E-04 4.88E-04 AP NBF 295619001 12/28/2011 Th-228 1.19E-04 1.74E-04 4.57E-04 AP NBF 295619001 12/28/2011 Zn-65 -1.50E-04 2.54E-04 7.96E-04 AP NBF 295619001 12/28/2011 Zr-95 -3.43E-05 3.62E-04 1.18E-03 AP SBN 295619002 12/28/2011 Ac-228 -2.34E-04 4.39E-04 1.33E-03 AP SBN 295619002 12/28/2011 Ag-108m -9.58E-05 6.66E-05 1.93E-04 AP SBN 295619002 12/28/2011 Ag- I 10m -4.40E-05 8.34E-05 2.68E-04 AP SBN 295619002 12/28/2011 Ba-140 -2.41E-03 1.52E-02 4.95E-02 AP SBN 295619002 12/28/2011 Be-7 1.23E-01 8.10E-03 5.94E-03 AP SBN 295619002 12/28/2011 Ce- 141 -4.33E-04 6.81E-04 2.OOE-03 AP SBN 295619002 12/28/2011 Ce- 144 -6.54E-04 4.63E-04 1.31E-03 AP SBN 295619002 12/28/2011 Co-57 1.15E-05 5.78E-05 1.88E-04 AP SBN 295619002 12/28/2011 Co-58 -6.64E-06 1.74E-04 5.68E-04 AP SBN 295619002 12/28/2011 Co-60 -5.44E-05 1.08E-04 3.33E-04 AP SBN 295619002 12/28/2011 Cr-51 1.50E-03 5.49E-03 1.79E-02 AP SBN 295619002 12/28/2011 Cs-134 -4.28E-05 1.13E-04 3.61E-04 AP SBN 295619002 12/28/2011 Cs-137 1.23E-05 7.36E-05 2.48E-04 AP SBN 295619002 12/28/2011 Fe-59 3.07E-04 5.74E-04 1.96E-03 AP SBN 295619002 12/28/2011 1-131 1.92E-01 1.53E-01 0.OOE+00 AP SBN 295619002 12/28/2011 K-40 3.47E-03 1.45E-03 4.63E-03 AP SBN 295619002 12/28/2011 La-140 -2.41E-03 1.52E-02 4.95E-02 AP SBN 295619002 12/28/2011 Mn-54 2.76E-05 9.92E-05 3.29E-04 AP SBN 295619002 12/28/2011 Nb-95 4.48E&05 1.94E-04 6.49E-04 AP SBN 295619002 12/28/2011 Ru-103 6.3 1E-04 3.65E-04 1.19E-03 AP SBN 295619002 12/28/2011 Ru-106 -1.42E-03 9.11E-04 2.62E-03 AP SBN 295619002 12/28/2011 Sb-124 1.39E-04 4.76E-04 1.60E-03 AP SBN 295619002 12/28/2011 Sb-125 3.14E-04 2.21E-04 7.37E-04 AP SBN 295619002 12/28/2011 Se-75 -1.18E-04 1.54E-04 4.83E-04.

AP SBN 295619002 12/28/2011 Th-228 1.55E-04 2.40E-04 4.97E-04 AP SBN 295619002 12/28/2011 Zn-65 -7.20E-06 2.49E-04 8.20E-04 AP SBN 295619002 12/28/2011 Zr-95 4.41E-04 3.68E-04 1.25E-03 AP DOW 295619003 12/28/2011 Ac-228 4.57E-04 8.OOE-04 2.60E-03 AP DOW 295619003 12/28/2011 Ag-108m -1.37E-04 1.28E-04 3.75E-04 AP DOW 295619003 12/28/2011 Ag-I 10m 1.31E-04 1.83E-04 6.33E-04 D-27

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP DOW 295619003 12/28/2011 Ba-140 -9.52E-03 2.45E-02 7.53E-02 U AP DOW 295619003 12/28/2011 Be-7 1.43E-01 1.20E-02 1.17E-02 AP DOW 295619003 12/28/2011 Ce-141 -1.58E-03 9.85E-04 2.74E-03 U AP DOW 295619003 12/28/2011 Ce-144 3.30E-04 6.83E-04 2.26E-03 U AP DOW 295619003 12/28/2011 Co-57 -3.84E-05 7.75E-05 2.46E-04 U AP DOW 295619003 12/28/2011 Co-58 -5.06E-05 3.32E-04 1.08E-03 U AP DOW 295619003 12/28/2011 Co-60 8.65E-06 1.67E-04 5.57E-04 U AP DOW 295619003 12/28/2011 Cr-51 -1.46E-03 9.44E-03 3.12E-02 U AP DOW 295619003 12/28/2011 Cs-134 8.37E-05 1.95E-04 6.61E-04 U AP DOW 295619003 12/28/2011 Cs-137 2.55E-04 1.81E-04 6.23E-04 U AP DOW 295619003 12/28/2011 Fe-59 5.09E-04 1.19E-03 4.14E-03 U AP DOW 295619003 12/28/2011 1-131 -5.97E-02 2.66E-01 0.OOE+00 U AP DOW 295619003 12/28/2011 K-40 -3.15E-03 2.56E-03 7.76E-03 U AP DOW 295619003 12/28/2011 La-140 -9.52E-03 2.45E-02 7.53E-02 U AP DOW 295619003 12/28/2011 Mn-54 -2.06E-04 2.17E-04 6.46E-04 U AP DOW 295619003 12/28/2011 Nb-95 -7.50E-04 4.49E-04 1.17E-03 U AP DOW 295619003 12/28/2011 Ru-103 9.92E-05 5.96E-04 1.95E-03 U AP DOW 295619003 12/28/2011 Ru-106 5.36E-04 1.53E-03 5.23E-03 U AP DOW 295619003 12/28/2011 Sb-124 1.08E-03 9.47E-04 3.49E-03 U AP DOW 295619003 12/28/2011 Sb-125 5.06E-04 4.03E-04 1.36E-03 U AP DOW 295619003 12/28/2011 Se-75 -5.55E-04 2.62E-04 6.68E-04 U AP DOW 295619003 12/28/2011 Th-228 9.31E-04 4.14E-04 8.24E-04 UI AP DOW 295619003 12/28/2011 Zn-65 8.98E-04 4.66E-04 1.65E-03 U AP DOW 295619003 12/28/2011 Zr-95 -3.27E-04 6.84E-04 2.16E-03 U AP COL 295619004 12/28/2011 Ac-228 5.05E-04 4.37E-04 1.53E-03 U AP COL 295619004 12/28/2011 Ag-108m -1.87E-05 6.20E-05 1.95E-04 U AP COL 295619004 12/28/2011 Ag-I l0m 2.61E-05 8.93E-05 3.03E-04 U AP COL 295619004 12/28/2011 Ba-140 9.92E-03 1.46E-02 5.08E-02 U AP COL 295619004 12/28/2011 Be-7 1.07E-01 8.39E-03 6.56E-03 AP COL 295619004 12/28/2011 Ce-141 -5.35E-04 6.04E-04 1.81E-03 U AP COL 295619004 12/28/2011 Ce-144 -2.09E-04 4.12E-04 1.28E-03 U AP COL 295619004 12/28/2011 Co-57 5.61E-05 5.63E-05 1.84E-04 U AP COL 295619004 12/28/2011 Co-58 -1.50E-04 1.81E-04 5.37E-04 U AP COL 295619004 12/28/2011 Co-60 -1.50E-04 9.11E-05 2.04E-04 U AP COL 295619004 12/28/2011 Cr-51 3.73E-03 5.43E-03 1.83E-02 U AP COL 295619004 12/28/2011 Cs-134 -1.12E-04 9.97E-05 2.78E-04 U AP COL 295619004 12/28/2011 Cs-137 4.04E-06 7.84E-05 2.62E-04 U AP COL 295619004 12/28/2011 Fe-59 -1.35E-04 5.66E-04 1.85E-03 U AP COL 295619004 12/28/2011 1-131 -1.15E-01 1.42E-01 0.OOE+00 U AP COL 295619004 12/28/2011 K-40 -1.79E-03 1.27E-03 4.19E-03 U AP COL 295619004 12/28/2011 La-140 9.92E-03 1.46E-02 5.08E-02 U AP COL 295619004 12/28/2011 Mn-54 -3.80E-05 9.41E-05 2.95E-04 U AP COL 295619004 12/28/2011 Nb-95 1.71E-04 2.12E-04 6.53E-04 U AP COL 295619004 12/28/2011 Ru-103 2.73E-04 3.18E-04 1.07E-03 U AP COL 295619004 12/28/2011 Ru-106 -1.35E-03 7.99E-04 2.07E-03 U AP. COL 295619004 12/28/2011 Sb-124 8.81E-04 6.67E-04 2.40E-03 U AP COL 295619004 12/28/2011 Sb-125 7.67E-05 2.03E-04 6.70E-04 U AP COL 295619004 12/28/2011 Se-75 9.60E-06 1.46E-04 4.87E-04 U AP COL 295619004 12/28/2011 Th-228 1.18E-05 1.59E-04 4.47E-04 U AP COL 295619004 12/28/2011 Zn-65 -3.87E-04 2.50E-04 6.40E-04 U AP COL 295619004 12/28/2011 Zr-95 5.02E-04 3.57E-04 1.24E-03 U D-28

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-1 295619005 12/28/2011 Ac-228 2.68E-04 4.65E-04 1.56E-03 U AP ONS-1 295619005 12/28/2011 Ag-108m 7.18E-05 8.16E-05 2.71E-04 U AP ONS-1 295619005 12/28/2011 Ag-Il0m 9.34E-05 1.24E-04 4.22E-04 U AP ONS-1 295619005 12/28/2011 Ba-140 -6.57E-03 1.74E-02 5.53E-02 U AP ONS-1 295619005 12/28/2011 Be-7 1.29E-01 9.17E-03 8.05E-03 AP ONS-I 295619005 12/28/2011 Ce-141 -8.58E-05 7.09E-04 2.28E-03 U AP ONS-1 295619005 12/28/2011 Ce-144 3.30E-04 5.09E-04 1.68E-03 U AP ONS-1 295619005 12/28/2011 Co-57 2.24E-05 6.52E-05 2.15E-04 U AP ONS-1 295619005 12/28/2011 Co-58 -1.16E-04 2.OOE-04 6.09E-04 U AP ONS-1 295619005 12/28/2011 Co-60 4.11E-05 1.19E-04 4.01E-04 U AP ONS-1 295619005 12/28/2011 Cr-51 -7.61E-04 6.29E-03 2.07E-02 U AP ONS-1 295619005 12/28/2011 Cs-134. 1.63E-04 1.49E-04 5.04E-04 U AP ONS-1 295619005 12/28/2011 Cs-137 1.18E-05 1.09E-04 3.63E-04 U AP ONS-1 295619005 12/28/2011 Fe-59 -1.62E-04 6,86E-04 2.22E-03 U AP ONS-1 295619005 12/28/2011 1-131 1.66E-01 1.79E-01 0.OOE+00 UI AP ONS-1 295619005 12/28/2011 K-40 -6.91E-04 1.62E-03 5.69E-03 U AP ONS-1 295619005 12/28/2011 La-140 -6.57E-03 1.74E-02 5.53E-02 U AP ONS-1 295619005 12/28/2011 Mn-54 -7.97E-05 1.34E-04 4.11E-04 U AP ONS-1 295619005 12/28/2011 Nb-95 5.90E-04 3.13E-04 1.03E-03 U AP ONS-I 295619005 12/28/2011' Ru-103 2.75E-04 4.03E-04 1.39E-03 U AP ONS-1 295619005 12/28/2011 Ru-106 -6.84E-04 1.06E-03 3.33E-03 U AP ONS-1 295619005 12/28/2011 Sb-124 -4.82E-04 7.09E-04 2.12E-03 U AP ONS-1 295619005 12/28/2011 Sb-125 6.56E-04 3.05E-04 9.65E-04 U AP ONS-1 295619005 12/28/2011 Se-75 7.40E-05 1.64E-04 5.57E-04 U AP ONS-1 295619005 12/28/2011 Th-228 3.08E-04 2.13E-04 4.70E-04 U AP ONS-1 295619005 12/28/2011 Zn-65 -3.74E-04 3.15E-04 8.94E-04 U AP ONS-I 295619005 12/28/2011 Zr-95 7.39E-04 4.15E-04 1.43E-03 U AP ONS-2 295619006 12/28/2011 Ac-228 -1.62E-04 3.68E-04 1.22E-03 U AP ONS-2 295619006 12/28/2011 Ag-108m 1.70E-05 6.29E-05 2.1OE-04 U AP ONS-2 295619006 12/28/2011 Ad- 10m 6.20E-05 9.22E-05 3.08E-04 U AP ONS-2 295619006 12/28/2011 Ba-140 5.04E-03 1.21E-02 4.22E-02 U AP ONS-2 295619006 12/28/2011 Be-7 1.18E-01 8.66E-03 5.46E-03 AP ONS-2 295619006 12/28/2011 Ce-141 7.03E-04 5.69E-04 1.85E-03 U AP ONS-2 295619006 12/28/2011 Ce-144 -5.21E-04 4.19E-04 1.22E-03 U AP ONS-2 295619006 12/28/2011 Co-57 -1.04E-04 5.97E-05 1.63E-04 U AP ONS-2 295619006 12/28/2011 Co-58 -2.96E-05 1.64E-04 5.41E-04 U AP ONS-2 295619006 12/28/2011 Co-60 1.OOE-04 1.06E-04 3.67E-04 U AP ONS-2 295619006 12/28/2011 Cr-51 -6.55E-04 5.OOE-03 1.66E-02 U AP ONS-2 295619006 12/28/2011 Cs-134 2.09E-05 1.07E-04 3.64E-04 U AP ONS-2 295619006 12/28/2011 Cs-137 -1.21E-04 8.94E-05 2.40E-04 U AP ONS-2 295619006 12/28/2011 Fe-59 -7.26E-07 6.77E-04 2.22E-03 U AP ONS-2 295619006 12/28/2011 1-131 3.18E-02 1.46E-01 0.OOE+00 UI AP ONS-2 295619006 12/28/2011 K-40 3.20E-03 1.56E-03 3.02E-03 UI AP ONS-2 295619006 12/28/2011 La-140 5.04E-03 1.21E-02 4.22E-02 U AP ONS-2 295619006 12/28/2011 Mn-54 1.67E-05 8.89E-05 3.01E-04 U AP ONS-2 295619006 12/28/2011 Nb-95 -2.89E-04 1.86E-04 4.96E-04 U AP ONS-2 295619006 12/28/2011 Ru-103 -3.49E-04 3.24E-04 9.42E-04 U AP ONS-2 295619006 12/28/2011 Ru-106 8.74E-04 8.18E-04 2.75E-03 U AP ONS-2 295619006 12/28/2011 Sb-124 3.48E-04 5.72E-04 2.02E-03 U AP ONS-2 295619006 12/28/2011 Sb-125 3.30E-04 2.19E-04 7.34E-04 U AP ONS-2 295619006 12/28/2011 Se-75 1.39E-04 1.51E-04 5.16E-04 U D-29

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-2 295619006 12/28/2011 Th-228 3.06E-05 1.27E-04 4.21E-04 U AP ONS-2 295619006 12/28/2011 Zn-65 1.85E-04 2.93E-04 8.85E-04 U AP ONS-2 295619006 12/28/2011 Zr-95 1.62E-04 3.16E-04 1.1OE-03 U AP ONS-3 295619007 12/28/2011 Ac-228 2.73E-04 2.93E-04 1.02E-03 U AP ONS-3 295619007 12/28/2011 Ag-108m 1.82E-04 8.41E-05 2.70E-04 U AP ONS-3 295619007 12/28/2011 Ag-110m -6.94E-05 9.69E-05 3.02E-04 U AP ONS-3 295619007 12/28/2011 Ba- 140 7.63E-03 1.52E-02 5.18E-02 U AP ONS-3 295619007 12/28/2011 Be-7 1.88E-01 1.16E-02 6.23E-03 AP ONS-3 295619007 12/28/2011 Ce- 141 1.60E-04 6.92E-04 2.24E-03 U AP ONS-3 295619007 12/28/2011 Ce- 144 -3.47E-04 5.14E-04 1.63E-03 U AP ONS-3 295619007 12/28/2011 Co-57 1.52E-05 6.92E-05 2.31E-04 U AP ONS-3 295619007 12/28/2011 Co-58 3.1OE-05 1.93E-04 6.45E-04 U AP ONS-3 295619007 12/28/2011 Co-60 1.17E-04 1.05E-04 3.75E-04 U AP ONS-3 295619007 12/28/2011 Cr-51 6.95E-03 6.57E-03 2.22E-02 U AP ONS-3 295619007 12/28/2011 Cs-134 4.14E-05 1.0IE-04 3.45E-04 U AP ONS-3 295619007 12/28/2011 Cs-137 1.55E-04 9.02E-05 3.11E-04 U AP ONS-3 295619007 12/28/2011 Fe-59 1.29E-03 7.42E-04 2.58E-03 U AP ONS-3 295619007 12/28/2011 1-131 1.04E-01 1.93E-01 0.OOE+00 UI AP ONS-3 295619007 12/28/2011 K-40 2.64E-03 1.39E-03 4.78E-03 U AP ONS-3 295619007 12/28/2011 La-140 7.63E-03 1.52E-02 5.18E-02 U AP ONS-3 295619007 12/28/2011 Mn-54 -9.OOE-06 9.94E-05 3.24E-04 U AP ONS-3 295619007 12/28/2011 Nb-95 1.35E-04 2.18E-04 7.44E-04 U AP ONS-3 295619007 12/28/2011 Ru-103 -1. 19E-03 4.68E-04 9.38E-04 U AP ONS-3 295619007 12/28/2011 Ru-106 1.27E-03 9.87E-04 3.40E-03 U AP ONS-3 295619007 12/28/2011 Sb-124 3.38E-04 4.38E-04 1.62E-03 U AP ONS-3 295619007 12/28/2011 Sb-125 -5.99E-06 2.33E-04 7.64E-04 U AP ONS-3 295619007 12/28/2011 Se-75 1.51E-05 1.80E-04 6.09E-04 U AP ONS-3 295619007 12/28/2011 Th-228 6.85E-06 1.65E-04 5.17E-04 U AP ONS-3 295619007 12/28/2011 Zn-65 -9.72E-05 2.75E-04 8.88E-04 U AP ONS-3 295619007 12/28/2011 Zr-95 3.02E-04 4.16E-04 1.4313-03 U AP ONS-4 295619008 12/28/2011 Ac-228 -2.47E-04 4.60E-04 1.57E-03 U AP ONS-4 295619008 12/28/2011 Ag-108m -3.08E-06 7.66E-05 2.57E-04 U AP ONS-4 295619008 12/28/2011 Ag-110m -8.66E-06 1.20E-04 3.89E-04 U AP ONS-4 295619008 12/28/2011 Ba- 140 1.69E-02 1.48E-02 5.48E-02 U AP ONS-4 295619008 12/28/2011 Be-7 1.09E-01 8.55E-03 6.88E-03 AP ONS-4 295619008 12/28/2011 Ce- 141 -9.48E-04 6.55E-04 1.94E-03 U AP ONS-4 295619008 12/28/2011 Ce-144 -1. 19E-04 5.08E-04 1.70E-03 U AP ONS-4 295619008 12/28/2011 Co-57 1.08E-05 6.11 E-05 2.09E-04 U AP ONS-4 295619008 12/28/2011 Co-58 7'.79E-05 1.69E-04 5.92E-04 U AP ONS-4 295619008 12/28/2011 Co-60 1.83E-04 1.24E-04 4.46E-04 U AP ONS-4 295619008 12/28/2011 Cr-51 -4.40E-03 6.85E-03 2.09E-02 U AP ONS-4 295619008 12/28/2011 Cs-134 -2.12E-04 1.18E-04 2.52E-04 U AP ONS-4 295619008 12/28/2011 Cs-137 -7.93E-06 8.96E-05 2.89E-04 U AP ONS-4 295619008 12/28/2011 Fe-59 -6.02E-04 6.06E-04 1.65E-03 U AP ONS-4 295619008 12/28/2011 1-131 -3.73E-02 1.89E-01 0.OOE+00 U AP ONS-4 295619008 12/28/2011 K-40 -5.15E-04 1.47E-03 4.89E-03 U AP ONS-4 295619008 12/28/2011 La- 140 1.69E-02 1.48E-02 5.48E-02 U AP ONS-4 295619008 12/28/2011 Mn-54 1.14E-04 1.33E-04 4.63E-04 U AP ONS-4 295619008 12/28/2011 Nb-95 1.43E-04 2.62E-04 8.71E-04 U AP ONS-4 295619008 12/28/2011 Ru- 103 2.40E-04 3.88E-04 1.33E-03 U AP ONS-4 295619008 12/28/2011 Ru-106 6.09E-04 1.00E-03 3.38E-03 U D-30

. Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-4 295619008 12/28/2011 Sb-124 1.64E-05 5.32E-04 1.77E-03 U AP ONS-4 295619008 12/28/2011 Sb-125 1.55E-04 2.57E-04 8.83E-04 U AP ONS-4 295619008 12/28/2011 Se-75 -3.70E-04 2.07E-04 5.48E-04 U AP ONS-4 295619008 12/28/2011 Th-228 6.55E-05 2.84E-04 6.85E-04 U AP ONS-4 295619008 12/28/2011 Zn-65 -2.76E-04 3.15E-04 9.26E-04 U AP ONS-4 295619008 12/28/2011 Zr-95 -3.80E-04 3.34E-04 8.71E-04 U AP ONS-5 295619009 12/28/2011 Ac-228 -5.17E-04 3.91E-04 1.13E-03 U AP ONS-5 295619009 12/28/2011 Ag-108m 5.29E-05 7.05E-05 2.39E-04 U AP ONS-5 295619009 12/28/2011 Ag-Il0m -4.32E-05 1.26E-04 3.57E-04 U AP ONS-5 295619009 12/28/2011 Ba-140 -2.62E-02 1.46E-02 3.18E-02 U AP ONS-5 295619009 12/28/2011 Be-7 1.07E-01 8.55E-03 6.06E-03 AP ONS-5 295619009 12/28/2011 Ce-141 -6.23E-04 5.77E-04 1.73E-03 U AP ONS-5 295619009 12/28/2011 Ce-144 5.22E-04 5.19E-04 1.71E-03 U AP ONS-5 295619009 12/28/2011 Co-57 -6.58E-07 5.81E-05 1.91E-04 U AP ONS-5 295619009 12/28/2011 Co-58 1.19E-04 2.18E-04 7.48E-04 U AP ONS-5 295619009 12/28/2011 Co-60 7.07E-05 1.18E-04 4.14E-04 U AP ONS-5 295619009 12/28/2011 Cr-51 -2.01E-03 5.55E-03 1.83E-02 U AP ONS-5 295619009 12/28/2011 Cs-134 -6.27E-05 9.75E-05 3.01E-04 U AP ONS-5 295619009 12/28/2011 Cs-137 3.1OE-05 1.32E-04 3.09E-04 U AP ONS-5 295619009 12/28/2011 Fe-59 -7.43E-04 6.68E-04 1.81E-03 U AP ONS-5 295619009 12/28/2011 1-131 2.85E-02 1.34E-01 0.OOE+00 UI AP ONS-5 295619009 12/28/2011 K-40 5.57E-04 1.36E-03 4.87E-03 U AP ONS-5 295619009 12/28/2011 La-140 -2.62E-02 1.46E-02 3.18E-02 U AP ONS-5 295619009 12/28/2011 Mn-54 -4.26E-05 1.15E-04 3.72E-04 U AP ONS-5 295619009 12/28/2011 Nb-95 2.41E-05 2.27E-04 7.66E-04 U AP ONS-5 295619009 12/28/2011 Ru-103 1.86E-04 3.41E-04 1.14E-03 U AP ONS-5 295619009 12/28/2011 Ru-106 6.13E-04 8.53E-04 2.86E-03 U AP ONS-5 295619009 12/28/2011 Sb-124 -2.84E-04 5.79E-04 1.75E-03 U AP ONS-5 295619009 12/28/2011 Sb-125 1.92E-04 2.40E-04 8.13E-04 U AP ONS-5 295619009 12/28/2011 Se-75 1.99E-04 1.54E-04 5.26E-04 U AP ONS-5 295619009 12/28/2011 Th-228 4.66E-05 2.01E-04 5.36E-04 U AP ONS-5 295619009 12/28/2011 Zn-65 -2.34E-04 2.91E-04 8.52E-04 U AP ONS-5 295619009 12/28/2011 Zr-95 -3.88E-04 3.41E-04 9.78E-04 U AP ONS-6 295619010 12/28/2011 Ac-228 -6.05E-05 3.37E-04 1.14E-03 U AP ONS-6 295619010 12/28/2011 Ag-108m 6.07E-06 5.35E-05 1.80E-04 U AP ONS-6 295619010 12/28/2011 Ag-Il0m 9.27E-05 9.86E-05 3.33E-04 U AP ONS-6 295619010 12/28/2011 Ba-140 8.50E-03 1.50E-02 5.28E-02 U AP ONS-6 295619010 12/28/2011 Be-7 1.24E-01 8.81E-03 6.77E-03 AP ONS-6 295619010 12/28/2011 Ce-1,1 -4.04E-04 5.46E-04 1.73E-03 U AP ONS-6 295619010 12/28/2011 Ce-144 -3.85E-05 3.74E-04 1.25E-03 U AP ONS-6 295619010 12/28/2011 Co-57 4.32E-05 5.04E-05 1.72E-04 U AP ONS-6 295619010 12/28/2011 Co-58 -1.97E-04 1.68E-04 4.79E-04 U AP ONS-6 295619010 12/28/2011 Co-60 -3.63E-05 1.17E-04 3.64E-04 U AP ONS-6 295619010 12/28/2011 Cr-51 5.49E-03 5.67E-03 1.96E-02 U AP ONS-6 295619010 12/28/2011 Cs-134 -3.OOE-05 7.88E-05 2.54E-04 U AP ONS-6 295619010 12/28/2011 Cs-137 6.60E-05 7.98E-05 2.70E-04 U AP ONS-6 295619010 12/28/2011 Fe-59 1.59E-04 5.10E-04 1.73E-03 U AP ONS-6 295619010 12/28/2011 1-131 -2.86E-01 2.17E-01 0.00E+00 U AP ONS-6 295619010 12/28/2011 K-40 4.10E-03 1.24E-03 3.03E-03 UI AP ONS-6 295619010 12/28/2011 La-140 8.50E-03 1.50E-02 5.28E-02 U AP ONS-6 295619010 12/28/2011 Mn-54 5.04E-05 8.90E-05 3.09E-04 U D-31

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP ONS-6 295619010 12/28/2011 Nb-95 3.30E-04 2.16E-04 7.54E-04 U AP ONS-6 295619010 12/28/2011 Ru-103 3.08E-04 3.19E-04 1.09E-03 U AP ONS-6 295619010 12/28/2011 Ru-106 1.43E-03 8.65E-04 2.91E-03 U AP ONS-6 295619010 12/28/2011 Sb-124 -4.25E-04 6.04E-04 1.78E-03 U AP ONS-6 295619010 12/28/2011 Sb-125 1.56E-05 1.99E-04 6.67E-04 U AP ONS-6 295619010 12/28/2011 Se-75 6.16E-05 1.38E-04 4.51E-04 U AP ONS-6 295619010 12/28/2011 Th-228 1.45E-04 2.14E-04 2.99E-04 U AP ONS-6 295619010 12/28/2011 Zn-65 -5.59E-04 2.87E-04 6.51E-04 U AP ONS-6 295619010 12/28/2011 Zr-95 2.42E-04 3.39E-04 1.19E-03 U AP NBF 290961001 11/22/2011 BETA 4.58E-02 2.70E-03 1.67E-03 AP SBN 290961002 11/22/2011 BETA 3.28E-02 2.26E-03 1.62E-03 AP. DOW 290961003 11/22/2011 BETA 3.48E-02 2.3 1E-03 1.61E-03 AP COL 290961004 11/22/2011 BETA 3.47E-02 2.3 1E-03 1.62E-03 AP ONS-1 290961005 11/22/2011 BETA 3.59E-02 2.36E-03 1.62E-03 AP ONS-2 290961006 11/22/2011 BETA 3.83E-02 2.48E-03 1.68E-03 AP ONS-3 290961007 11/22/2011 BETA 6.63E-02 3.21E-03 1.63E-03 AP ONS-4 290961008 11/22/2011 BETA 3.48E-02 2.34E-03 1.65E-03 AP ONS-5 290961009 11/22/2011 BETA 3.24E-02 2.24E-03 1.62E-03 AP ONS-6 290961010 11/22/2011 BETA 4.04E-02 2.51E-03 1.64E-03 AP NBF 291277001 11/30/2011 BETA 2.57E-02 1.74E-03 1.09E-03 AP SBN 291277002 11/30/2011 BETA 3.08E-02 1.90E-03 1.09E-03 AP DOW 291277003 11/30/2011 BETA 2.96E-02 1.85E-03 1.08E-03 AP COL 291277004 11/30/2011 BETA 3.56E-02 2.OOE-03 1.05E-03 AP ONS-1 291277005 11/30/2011 BETA 3.05E-02 1.89E-03 1.1OE-03 AP ONS-2 291277006 11/30/2011 BETA 3.35E-02 1.98E-03 1.IOE-03 AP ONS-3 291277007 11/30/2011 BETA 5.82E-02 2.61E-03 1.08E-03 AP ONS-4 291277008 11/30/2011 BETA 3.09E-02 1.91E-03 1.1OE-03 AP ONS-5 291277009 11/30/2011 BETA 2.96E-02 1.85E-03 1.08E-03 AP ONS-6 291277010 11/30/2011 BETA 2.86E-02 1.83E-03 1.1OE-03 AP NBF 291748001 12/7/2011 BETA 4.24E-02 2.40E-03 1.56E-03 AP SBN 291748002 12/7/2011 BETA 3.79E-02 2.25E-03 1.53E-03 AP DOW 291748003 12/7/2011 BETA 3.39E-02 2.12E-03 1.52E-03 AP COL 291748004 12/7/2011 BETA 3.52E-02 2.18E-03 1.54E-03 AP ONS-1 291748005 12/7/2011 BETA 3.28E-02 2.09E-03 1.53E-03 AP ONS-2 291748006 12/7/2011 BETA 3.61 E-02 2.20E-03 1.53E-03 AP ONS-3 291748007 12/7/2011 BETA 6.14E-02 2.87E-03 1.53E-03 AP ONS-4 291748008 12/7/2011 BETA 3.45E-02 2.17E-03 1.56E-03 AP ONS-5 291748009 12/7/2011 BETA 3.17E-02 2.06E-03 1.53E-03 AP ONS-6 291748010 12/7/2011 BETA 3.46E-02 2.16E-03 1.54E-03 AP NBF 292211001 12/14/2011 BETA 7.04E-02 3.11E-03 1.36E-03 AP SBN 292211002 12/14/2011 BETA 6.90E-02 3.06E-03 1.34E-03 AP DOW 292211003 12/14/2011 BETA 7.03E-02 3.18E-03 1.43E-03 AP COL 292211004 12/14/2011 BETA 6.17E-02 2.94E-03 1.40E-03 AP ONS-1 292211005 12/14/2011 BETA 6.17E-02 2.89E-03 1.35E-03 AP ONS-2 292211006 12/14/2011 BETA 6.42E-02 3.07E-03 1.46E-03 AP ONS-3 292211007 12/14/2011 BETA I.I1E-01 3.93E-03 1.34E-03 AP ONS-4 292211008 12/14/2011 BETA 6.86E-02 3.13E-03 1.42E-03 AP ONS-5 292211009 12/14/2011 BETA 5.58E-02 2.76E-03 1.36E-03 AP ONS-6 292211010 12/14/2011 BETA 6.38E-02 2.96E-03 1.37E-03 AP NBF 292714001 12/21/2011 BETA 5.65E-02 2.76E-03 1.37E-03 AP SBN 292714002 12/21/2011 BETA 5.92E-02 2.89E-03 1.43E-03 D-32

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP DOW 292714003 12/21/2011 BETA 5.71E-02 2.85E-03 1.44E-03 AP COL 292714004 12/21/2011 BETA 4.99E-02 2.62E-03 1.40E-03 AP ONS-1 292714005 12/21/2011 BETA 5.55E-02 2.72E-03 1.36E-03 AP ONS-2 292714006 12/21/2011 BETA 5.3 1E-02 2.64E-03 1.33E-03 AP ONS-3 292714007 12/21/2011 BETA 9.88E-02 3.67E-03 1.35E-03 AP ONS-4 292714008 12/21/2011 BETA 5.49E-02 2.74E-03 1.38E-03 AP ONS-5 292714009 12/21/2011 BETA 4.44E-02 2.45E-03 1.37E-03 AP ONS-6 292714010 12/21/2011 BETA 5.76E-02 2.78E-03 1.36E-03 AP NBF 292858001 12/28/2011 BETA 3.79E-02 2.27E-03 1.37E-03 AP SBN 292858002 12/28/2011 BETA 3.82E-02 2.36E-03 1.47E-03 AP DOW 292858003 12/28/2011 BETA 3.49E-02 2.24E-03 1.46E-03 AP COL 292858004 12/28/2011 BETA 3.35E-02 2.17E-03 1.42E-03 AP ONS-1 292858005 12/28/2011 BETA 3.97E-02 2.3 1E-03 1.36E-03 AP ONS-2 292858006 12/28/2011 BETA 3.62E-02 2.28E-03 1.45E-03 AP ONS-3 292858007 12/28/2011 BETA 7.31E-02 3.14E-03 1.35E-03 AP ONS-4 292858008 12/28/2011 BETA 3.37E-02 2.16E-03 1.40E-03 AP ONS-5 292858009 12/28/2011 BETA 3.19E-02 2.08E-03 1.38E-03 AP ONS-6 292858010 12/28/2011 BETA 3.63E-02 2.2 1E-03 1.35E-03 D-33

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF NBF 270004012 1/5/2011 1-131 1.1OE-03 4.85E-03 1.64E-02 U CF SBN 270004013 1/5/2011 1-131 -1.21E-03 4.02E-03 1.30E-02 U CF DOW 270004014 1/5/2011 1-131 -3.76E-04 5.21E-03 1.65E-02 U CF COL 270004015 1/5/2011 1-131 8.73E-03 4.59E-03 1.85E-02 U CF ONS-1 270004016 1/5/2011 1-131 -6.57E-03 6.02E-03 1.67E-02 U CF ONS-2 270004017 1/5/2011 .1-131 3.1OE-03 4.01E-03 1.47E-02 U CF ONS-3 270004018 1/5/2011 1-131 -3.68E-03 4.58E-03 1.30E-02 U CF ONS-4 270004019 1/5/2011 1-131 -5.22E-03 4.04E-03 1.01E-02 U CF ONS-5 270004020 1/5/2011 1-131 -1.45E-03 5.24E-03 1.67E-02 U CF ONS-6 270004021 1/5/2011 1-131 -4.83E-03 5.17E-03 1.54E-02 U CF NBF 270374012 1/12/2011 1-131 -1.89E-03 5.40E-03 1.64E-02 U CF SBN 270374013 1/12/2011 1-131 4.71E-03 4.27E-03 1.60E-02 U CF DOW 270374014 1/12/2011 1-131 4.36E-03 5.37E-03 1.93E-02 U CF COL 270374015 1/12/2011 1-131 3.60E-03 3.61E-03 1.37E-02 U CF ONS-1 270374016 1/12/2011 1-131 1.30E-03 2.14E-03 8.12E-03 U CF ONS-2 270374017 1/12/2011 1-131 1.20E-04 5.04E-03 1.67E-02 U CF ONS-3 270374018 1/12/2011 1-131 -2.65E-04 3.45E-03 1.10E-02 U CF ONS-4 270374019 1/12/2011 1-131 -3.40E-03 3.63E-03 9.02E-03 U CF ONS-5 270374020 1/12/20 11 1-131 -1.62E-03 3.49E-03 1.04E-02 U CF ONS-6 270374021 1/12/2011 1-131 1.10E-03 5.12E-03 1.72E-02 U CF NBF 270795012 1/19/2011 1-131 1.60E-03 4.98E-03 1.72E-02 U CF SBN 270795013 1/19/20 11 1-131 1.57E-03 4.43E-03 1.53E-02 U CF DOW 270795014 1/19/20 11 1-131 -1.52E-03 4.53E-03 1.44E-02 U CF COL 270795015 1/19/2011 1-131 9.92E-03 5.OOE-03 2.05E-02 U CF ONS-1 270795016 1/19/2011 1-131 3.67E-03 4.82E-03 1.73E-02 U CF ONS-2 270795017 1/19/2011 1-131 -2.30E-03 4.79E-03 1.49E-02 U CF ONS-3 270795018 1/19/2011 1-131 -4.99E-03 5.35E-03 1.47E-02 U CF ONS-4 270795019 1/19/2011 1-131 2.36E-03 5.22E-03 1.87E-02 U CF ONS-5 270795020 1/19/2011 1-131 -2.01E-03 4.54E-03 1.33E-02 U CF ONS-6 270795021 1/19/2011 1-131 1.55E-04 6.33E-03 2.07E-02 U CF NBF 271263012 1/26/2011 1-131 8.54E-03 6.23E-03 2.28E-02 U CF SBN 271263013 1/26/2011 1-131 2.37E-03 4.17E-03 1.50E-02 U CF DOW 271263014 1/26/2011 1-131 -4.58E-03 4.67E-03 1.34E-02 U CF COL 271263015 1/26/2011 1-131 6.52E-03 5.18E-03 1.91E-02 U CF ONS-1 271263016 1/26/2011 1-131 2.21E-04 4.52E-03 1.54E-02 U CF ONS-2 271263017 1/26/2011 1-131 1.99E-03 5.15E-03 1.81E-02 U CF ONS-3 271263018 1/26/2011 1-131 3.45E-03 4.82E-03 1.71E-02 U CF ONS-4 271263019 1/26/2011 1-131 2.17E-03 4.74E-03 1.68E-02 U CF ONS-5 271263020 1/26/2011 1-131 -1.46E-03 5.30E-03 1.65E-02 U CF ONS-6 271263021 1/26/2011 1-131 -4.38E-03 3.77E-03 9.19E-03 U CF NBF 271781012 2/3/2011 1-131 -4.27E-03 5.13E-03 1.45E-02 U CF SBN 271781013 2/3/2011 1-131 -3.24E-04 5.63E-03 1.89E-02 U CF DOW 271781014 2/3/2011 1-131 1.72E-03 5.64E-03 1.89E-02 U CF COL 271781015 2/3/2011 1-131 -1.08E-04 6.OOE-03 1.97E-02 U CF ONS-1 271781016 2/3/2011 1-131 3.97E-03 5.46E-03 1.98E-02 U CF ONS-2 271781017 2/3/2011 1-131 -2.30E-03 6.04E-03 1.86E-02 U CF ONS-3 271781018 2/3/2011 1-131 -4.35E-03 6.29E-03 1.78E-02 U CF ONS-4 271781019 2/3/2011 1-131 5.29E-03 5.63E-03 2.07E-02 U CF ONS-5 271781020 2/3/2011 1-131 5.48E-04 3.67E-03 1.28E-02 U CF ONS-6 271781021 2/3/2011 1-131 1.30E-02 6.60E-03 2.47E-02 U CF NBF 272128012 2/9/2011 1-131 6.66E-03 6.03E-03 2.22E-02 U D-34

Donald C.-Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF SBN 272128013 2/9/2011 1-131 1.84E-04 4.35E-03 1.40E-02 U CF DOW 272128014 2/9/2011 1-131 8.47E-03 5'65E-03 2.1 1E-02 U CF COL 272128015 2/9/2011 1-131 4.37E-04 3.43E-03 1.19E-02 U CF ONS-1 272128016 2/9/2011 1-131 3.87E-03 6.37E-03 2.26E-02 U CF ONS-2 272128017 2/9/2011 1-131 -6.71E-03 3.77E-03 1.85E-03 U CF ONS-3 272128018 2/9/2011 1-131 4.86E-03 7.71E-03 2.67E-02 U CF ONS-4 272128019 2/9/2011 1-131 -1.68E-04 4.23E-03 1.37E-02 U CF ONS-5 272128020 2/9/2011 1-131 -4.72E-03 6.05E-03 1.71E-02 U CF ONS-6 272128021 2/9/2011 1-131 4.25E-04 4.77E-03 1.61E-02 U CF NBF 272564012 2/16/2011 1-131 -6.73E-03 4.07E-03 7.03E-03 U CF SBN 272564013 2/16/2011 1-131 5.12E-03 4.67E-03 1.76E-02 U CF DOW 272564014 2/16/2011 1-131 4.26E-03 4.08E-03 1.55E-02 U CF COL 272564015 2/16/2011 1-131 4.60E-03 5.73E-03 2.06E-02 U CF ONS-1 272564016 2/16/2011 1-131 7.29E-03 5.59E-03 1.98E-02 U CF ONS-2 272564017 2/16/2011 1-131 -7.53E-03 5.58E-03 1.35E-02 U CF ONS-3 272564018 2/16/2011 1-131 -6.77E-03 5.64E-03 1.40E-02 U CF ONS-4 272564019 2/16/2011 1-131 1.31E-03 3.99E-03 1.43E-02 U CF ONS-5 272564020 2/16/2011 1-131 -1.26E-04 4.85E-03, 1.57E-02 U CF ONS-6 272564021 2/16/2011 1-131 9.16E-04 4.74E-03 1.62E-02 U CF NBF 272944012 2/23/2011 1-131 -1.70E-03 4.83E-03 1.48E-02 U CF SBN 272944013 2/23/2011 1-131 -7.43E-05 5.40E-03 1.72E-02 U CF DOW 272944014 2/23/2011 1-131 -7.41E-03 6.04E-03 1.52E-02 U CF COL 272944015 2/23/2011 1-131 -1.39E-03 8.08E-03 2.56E-02 U CF ONS-1 272944016 2/23/2011 1-131 -3.43E-03 4.35E-03 1.16t-02 U CF ONS-2 272944017 2/23/2011 1-131 6.69E-03 4.66E-03 1.81E-02 U CF ONS-3 272944018 2/23/2011 1-131 2.5 1E-03 6.68E-03 2.25E-02 U CF ONS-4 272944019 2/23/2011 1-131 -2.OOE-03 3.93E-03 1.14E-02 U CF ONS-5 272944020 2/23/2011 1-131 2.48E-03 5.69E-03 2.OOE-02 U CF ONS-6 272944021 2/23/2011 1-131 -6.60E-03 7.57E-03 2.10E-02 U CF NBF 273401012 3/2/2011 1-131 3.80E-03 4.08E-03 1.43E-02 U CF SBN 273401013 3/2/2011 1-131 ,4.49E-03 3.18E-03 8.11E-03 U CF DOW 273401014 3/2/2011 1-131 -1.78E-03 3.40E-03 1.04E-02 U CF COL 273401015 3/2/2011 1-131 -4.35E-03 3.65E-03 9.41E-03 U CF ONS-1 273401016 3/2/2011 1-131 4.5 1E-03 3.40E-03 1.22E-02 U CF ONS-2 273401017 3/2/2011 1-131 -4.69E-03 4.38E-03 1.18E-02 U CF ONS-3 273401018 3/2/2011 1-131 -3.59E-03 3.27E-03 8.55E-03 U CF ONS-4 273401019 3/2/2011 1-131 -3.88E-03 3.48E-03 9.07E-03 U CF ONS-5 273401020 3/2/2011 1-131 -5.85E-03 4.55E-03 1.29E-02 U CF ONS-6 273401021 3/2/2011 1-131 2.85E-03 4.33E-03 1.52E-02 U CF NBF 273839012 3/9/2011 1-131 2.27E-04 4.65E-03 1.58E-02 U CF SBN 273839013 3/9/201.1 1-131 -9.12E-04 3.71E-03 1.14E-02 U CF DOW 273839014 3/9/2011 1-131 -4.03E-03 4.40E-03 1.06E-02 U CF COL 273839015 3/9/2011 1-131 2.67E-03 4.28E-03 1.57E-02 U CF ONS-1 273839016 3/9/2011 1-131 -7.68E-04 5.04E-03 1.63E-02 U CF ONS-2 273839017 3/9/2011 1-131 -6.12E-03 4.50E-03 1.12E-02 U CF ONS-3 273839018 3/9/2011 1-131 2.81E-03 5.14E-03 1.80E-02 U CF ONS-4 273839019 3/9/2011 1-131 -1.49E-02 7.40E-03 1.09E-02 U CF ONS-5 273839020 3/9/2011 1-131 -3.63E-03 5.29E-03 1.58E-02 U CF ONS-6 273839021 3/9/2011 1-131 3.64E-03 4.5 1E-03 1.69E-02 U CF NBF 274196012 3/16/2011 1-131 8.29E-03 5.68E-03 2.28E-02 U CF SBN 274196013 3/16/2011 1-131 5.92E-03 6.54E-03 2.45E-02 U D-35

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF DOW 274196014 3/16/2011 1-131 -1.40E-03 6.72E-03 2.17E-02 U CF COL 274196015 3/16/2011 1-131 2.39E-03 5.06E-03 1.86E-02 U CF ONS-1 274196016 3/16/2011 1-131 5.32E-03 6.89E-03 2.38E-02 U CF ONS-2 274196017 3/16/2011 1-131 2.76E-03 8.49E-03 2.94E-02 U CF ONS-3 274196018 3/16/2011 1-131 5.72E-04 4.94E-03 1.70E-02 U CF ONS-4 274196019 3/16/2011 1-131 2.11E-03 6.90E-03 2.33E-02 U CF ONS-5 274196020 3/16/2011 1-131 1.05E-02 9.29E-03 3.47E-02 U CF ONS-6 274196021 3/16/2011 1-131 5.11E-03 5.26E-03 1.91E-02 U CF NBF 274661012 3/23/2011 1-131 8.33E-02 1.26E-02 1.62E-02 CF SBN 274661013 3/23/2011 1-131 9.21 E-02 1.41 E-02 1.95E-02 CF DOW 274661014 3/23/2011 1-131 1.00E-01 1.35E-02 1.39E-02 CF COL 274661015 3/23/2011 1-131 8.90E-02 1.56E-02 1.28E-02 CF ONS-1 274661016 3/23/2011 1-131 1.08E-01 1.46E-02 1.42E-02 CF ONS-2 274661017 3/23/2011 1-131 8.69E-02 1.47E-02 1.65E-02 CF ONS-3 274661018 3/23/2011 1-131 1.24E-01. 2.24E-02 2.67E-02 CF ONS-4 274661019 3/23/2011 1-131 8.50E-02 1.22E-02 1.61E-02 CF ONS-5 274661020 3/23/2011 1-131 1.13E-01 1.59E-02 2.36E-02 CF ONS-6 274661021 3/23/2011 1-131 9.94E-02 1.43E-02 2.23E-02 CF NBF 275048012 3/30/2011 1-131 2.92E-02 7.40E-03 1.92E-02 M CF SBN 275048013 3/30/2011 1-131 4.67E-02 7.92E-03 1.12E-02 M CF DOW 275048014 3/30/2011 1-131' 2.33E-02 6.55E-03 2.54E-02 U CF COL 275048015 3/30/2011 1-131 3.86E-02 1.57E-02 5.27E-02 U CF ONS-1 275048016 3/30/2011 1-131 5.32E-02 1.17E-02 1.73E-02 M CF ONS-2 275048017 3/30/2011 1-131 3.84E-02 8.19E-03 1.38E-02 M CF ONS-3 275048018 3/30/2011 1-131 2.02E-02 7.76E-03 1.81E-02 UI M CF ONS-4 275048019 3/30/2011 1-131 2.88E-02 6.27E-03 1.36E-02 M CF ONS-5 275048020 3/30/2011 1-131 4.35E-02 7.52E-03 1.26E-02 M CF ONS-6 275048021 3/30/2011 1-131 3.21E-02 7.95E-03 1.26E-02 M CF NBF 275654012 4/6/2011 1-131 4.96E-02 1.18E-02 2.1OE-02 M CF SBN 275654013 4/6/2011 1-131 1.11E-01 1.39E-02 1.22E-02 CF DOW 275654014 4/6/2011 1-131 8.01E-02 1.17E-02 1.58E-02 CF COL 275654015 4/6/2011 1-131 6.71E-02 1.03E-02 1.25E-02 M CF ONS-1 275654016 4/6/2011 1-131 6.39E-02 1.27E-02 1.39E-02 M CF ONS-2 275654017 4/6/2011 1-131 7.15E-02 1.55E-02 1.59E-02 CF ONS-3 275654018 4/6/2011 1-131 6.36E-02 1.30E-02 1.89E-02 M CF ONS-4 275654019 4/6/2011 1-131 5.65E-02 1.01E-02 8.42E-03 M CF ONS-5 275654020 4/6/2011 1-131 6.79E-02 1.OOE-02 1.11E-02 M CF ONS-6 275654021 4/6/2011 1-131 8.19E-02 1.38E-02 2.19E-02 CF NBF 276211012 4/13/2011 1-131 1.50E-02 8.74E-03 3.20E-02 U CF SBN 276211013 4/13/2011 1-131 5.11E-02 1.49E-02 3.16E-02 UI M CF DOW 276211014 4/13/2011 1-131 4.64E-03 7.98E-03 2.82E-02 U CF COL 276211015 4/13/2011 1-131 6.24E-03 1.29E-02 4.46E-02 U CF ONS-1 276211016 4/13/2011 1-131 2.09E-02 8.11E-03 2.35E-02 U CF ONS-2 276211017 4/13/2011 1-131 1.62E-02 8.34E-03 2.98E-02 U CF ONS-3 276211018 4/13/2011 1-131 4.25E-02 9.95E-03 1.27E-02 UI M CF ONS-4 276211019 4/13/2011 1-131 2.70E-02 7.95E-03 1.58E-02 UI M CF ONS-5 276211020 4/13/2011 1-131 2.55E-02 8.76E-03 1.41E-02 UI M CF ONS-6 276211021 4/13/2011 1-131 2.64E-02 1.06E-02 3.71E-02 U CF NBF 276700012 4/20/2011 1-131 -6.22E-03 6.90E-03 2.03E-02 U CF SBN 276700013 4/20/2011 1-131 -1.54E-02 8.03E-03 1.55E-02 U CF DOW 4/20/2011 6.93E-03 276700014 1-131 5.32E-03 2.02E-02 U D-36

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF COL 276700015 4/20/2011 1-131 1.79E-02 7.91E-03 2.89E-02 U CF ONS-1 276700016 4/20/2011 1-131 5.36E-03 5.34E-03 1.99E-02 U CF ONS-2 276700017 4/20/2011 1-131 -1.30E-04 6.97E-03 2.34E-02 U CF ONS-3 276700018 4/20/2011 1-131 1.83E-02 8.41E-03 3.02E-02 U CF ONS-4 276700019 4/20/2011 1-131 -7.38E-03 8.88E-03 2.51E-02 U CF ONS-5 276700020 4/20/2011 1-131 5.36E-03 9.24E-03 3.26E-02 U CF ONS-6 276700021 4/20/2011 1-131 1.18E-02 6.29E-03 2.36E-02 U CF NBF 277144012 4/27/2011 1-131 -1.92E-03 6.06E-03 1.89E-02 U CF SBN 277144013 4/27/2011 1-131 2.12E-03 6.57E-03 2.28E-02 U CF .DOW 277144014 4/27/2011 1-131 -3.03E-03 5.1OE-03 1.51E-02 U CF COL 277144015 4/27/2011 1-131 1.90E-02 8.88E-03 3.38E-02 U CF ONS-1 277144016 4/27/2011 1-131 9.70E-03 7.38E-03 2.81E-02 U CF ONS-2 277144017 4/27/2011 1-131 6.54E-03 6.83E-03 2.53E-02 U CF ONS-3 277144018 4/27/2011 1-131 -5.35E-04 6.08E-03 1.92E-02 U CF ONS-4 277144019 4/27/2011 1-131 -9.99E-03 1.12E-02 3.19E-02 U CF ONS-5 277144020 4/27/2011 1-131 7.92E-04 6.68E-03 2.17E-02 U CF ONS-6 277144021 4/27/2011 1-131 -1.49E-04 7.87E-03 2.59E-02 U CF NBF 277636012 5/4/2011 1-131 8.80E-03 5.63E-03 1.98E-02 U CF SBN 277636013 5/4/2011 1-131 3.37E-03 5.38E-03 1.89E-02 U CF DOW 277636014 5/4/2011 1-131 1.51E-04 5.34E-03 1.78E-02 U CF COL 277636015 5/4/2011 1-131 -1.36E-03 3.60E-03 1.14E-02 U CF ONS-1 277636016 5/4/2011 1-131 -4.12E-03 3.27E-03 6.62E-03 U CF ONS-2 277636017 5/4/2011 1-131 -1.51E-04 7.26E-03 2.36E-02 U CF ONS-3 277636018 5/4/2011 1-131 -2.3 1E-03 4.32E-03 1.28E-02 U CF ONS-4 277636019 5/4/2011 1-131 4.58E-03 5.35E-03 1.93E-02 U CF ONS-5 277636020 5/4/2011 1-131 -2.39E-03 3.62E-03 1.08E-02 U CF ONS-6 277636021 5/4/2011 1-131 m7.03E-03 5.80E-03 1.51E-02 U CF NBF 278137012 5/11/2011 1-131 5.59E-04 5.64E-03 1.93E-02 U CF SBN 278137013 5/11/2011 1-131 5.34E-03 5.36E-03 1.99E-02 U CF DOW 278137014 5/11/2011 1-131 1.13E-03 7.75E-03 2.65E-02 U CF COL 278137015 5/11/2011 1-131 -8.02E-03 8.85E-03 2.53E-02 U CF ONS-1 278137016 5/11/2011 1-131 -4.71E-03 4.711E-03 1.25E-02 U CF ONS-2 278137017 5/11/2011 1-131 6.88E-03 1.06E-02 3.78E-02 U CF ONS-3 278137018 5/11/2011 .1-131 1.50E-02 7.86E-03 3.09E-02 U CF ONS-4 278137019 5/11/2011 1-131 -6.21E-03 5.60E-03 1.51E-02 U CF ONS-5 278137020 5/11/2011 1-131 -4.84E-03 6.77E-03 1.96E-02 U CF ONS-6 278137021 5/11/2011 1-131 2.89E-03 5.46E-03 2.02E-02 U CF NBF 278595012 5/18/2011 1-131 -2.19E-04 5.94E-03 1.95E-02 U CF SBN 278595013 5/18/2011 1-131 7.36E-03 3.97E-03 1.49E-02 U CF DOW 278595014 5/18/2011 1-131 2.39E-03 3.5 1E-03 1.27E-02 U CF COL 278595015 5/18/2011 1-131 -4.83E-03 5.89E-03 1.76E-02 U CF ONS-I 278595016 5/18/2011 1-131 -3.30E-03 4.7 1E-03 1.28E-02 U CF ONS-2 278595017 5/18/2011 1-131 -4.28E-03 6.74E-03 2.08E-02 U CF ONS-3 278595018 5/18/2011 1-131 -1.69E-03 4.60E-03 1.49E-02 U CF ONS-4 278595019 5/18/2011 1-131 -3.59E-03 4.57E-03 1.23E-02 U CF ONS-5 278595020 5/18/2011 1-131 -1.70E-03 4.52E-03 1.42E-02 U CF ONS-6 278595021 5/18/2011 1-131 6.98E-03 4.82E-03 1.80E-02 U CF NBF 278990012 5/25/201.1 1-131 -1.20E-03 2.10E-03 6.71 E-03 U CF SBN 278990013 5/25/2011 1-131 1.13E-03 1.74E-03 5.95E-03 U CF DOW 278990014 5/25/2011 1-131 4.70E-04 2. 11E-03 7.20E-03 U CF COL 278990015 5/25/2011 1-131 -2.21E-03 3.56E-03 1.12E-02 U D-37

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF ONS-1 278990016 5/25/2011 1-131 -6.29E-03 3.77E-03 1.1OE-02 U CF ONS-2 278990017 5/25/2011 1-131 -1.65E-03 2.29E-03 7.22E-03 U CF ONS-3 278990018 5/25/2011 1-131 -1.46E-03 2.10E-03 6.78E-03 U CF ONS-4 278990019 5/25/2011 1-131 -7.45E-04 2.24E-03 7.35E-03 U CF ONS-5 278990020 5/25/2011 1-131 1.91E-03 3.48E-03 1.18E-02 U CF ONS-6 278990021 5/25/2011 1-131 4.70E-03 3.86E-03 1.30E-02 U CF NBF 279343012 6/1/2011 1-131 -3.74E-04 9.26E-03 3.12E-02 U CF SBN 279343013 6/1/2011 1-131 2.33E-04 4.95E-03 1.65E-02 U CF DOW 279343014 6/1/2011 1-131 -5.19E-04 7.84E-03 2.60E-02 U CF COL 279343015 6/1/2011 1-131 2.89E-03 5.46E-03 2.02E-02 U CF ONS-1 279343016 6/1/2011 1-131 2.06E-03 9.08E-03 3.11E-02 U CF ONS-2 279343017 6/1/2011 1-131 -2.75E-03 6.57E-03 1.95E-02 U CF ONS-3 279343018 6/1/2011 1-131 4.30E-03 6.89E-03 2.45E-02 U CF ONS-4 279343019 6/1/2011 1-131 -1.31E-02 8.71E-03 1.89E-02 U CF ONS-5 279343020 6/1/2011 1-131 -1.65E-03 5.60E-03 1.76E-02 U CF ONS-6 279343021 6/1/2011 1-131 -2.08E-03 6.53E-03 2.05E-02 U CF NBF 279806012 6/8/2011 1-131 7.76E-03 6.74E-03 2.48E-02 U CF SBN 279806013 6/8/2011 1-131 2.85E-03 9.43E-03 3.21E-02 U CF DOW 279806014 6/8/2011 1-131 -4.40E-03 1.05E-02 3.38E-02 U CF COL 279806015 6/8/2011 1-131 -9.47E-03 6.20E-03 1.30E-02 U CF ONS-I 279806016 6/8/2011 1-131 1.11 E-02 7.36E-03 2.79E-02 U CF ONS-2 279806017 6/8/2011 1-131 6.12E-04 6.46E-03 2.20E-02 U CF ONS-3 279806018 6/8/2011 1-131 1.45E-03 6.27E-03 2.10E-02 U CF ONS-4 279806019 6/8/2011 1-131 -9.83E-03 6.80E-03 1.52E-02 U CF ONS-5 279806020 6/8/2011 1-131 4.62E-04 4.78E-03 1.64E-02 U CF ONS-6 279806021 6/8/2011 1-131 - 1.19E-02 1.14E-02 3.07E-02 U CF NBF 280248012 6/15/2011 1-131 -2.40E-03 6.44E-03 1.97E-02 U CF SBN 280248013 6/15/2011 1-131 9.90E-03 7.17E-03 2.77E-02 U CF DOW 280248014 6/15/2011 1-131 -2.92E-03 6.62E-03 2.08E-02 U CF COL 280248015 6/15/2011 1-131 1.18E-02 6.85E-03 2.71E-02 U CF ONS-1 280248016 6/15/2011 1-131 -2.88E-03 7.23E-03 2.30E-02 U CF ONS-2 280248017 6/15/2011 1-131 -9.60E-03 1.23E-02 3.75E-02 U CF ONS-3 280248018 6/15/2011 1-131 -3.77E-03 9.01E-03 2.67E-02 U CF ONS-4 280248019 6/15/2011 1-131 -8.21E-04 6.44E-03 2.06E-02 U CF ONS-6 280248021 6/15/2011 1-131 -5.74E-03 6.27E-03 1.51E-02 U CF NBF 280647012 6/22/2011 1-131 -4.04E-03 8.45E-03 1.18E-02 U CF SBN 280647013 6/22/2011 1-131 -1.25E-03 9.77E-03 1.59E-02 U CF DOW 280647014 6/22/2011 1-131 4.90E-03 5.49E-03 2.05E-02 U CF COL 280647015 6/22/2011 1-131 2.66E-03 4.36E-03 1.55E-02 U CF ONS-1 280647016 6/22/2011 1-131 9.07E-03 4.10E-03 1.63E-02 U CF ONS-2 280647017 6/22/2011 1-131 -2.59E-03 4.04E 1.16E-02 U CF ONS-3 280647018 6/22/2011 1-131 -4.83E-04 4.41E-03 1.45E-02 U CF ONS-4 280647019 6/22/2011 1-131 1.IIE-03 4.22E-03 1.43E-02 U CF ONS-5 280647020 6/22/2011 1-131 -7.42E-03 3.92E-03 6.63E-03 U CF ONS-6 280647021 6/22/2011 1-131 4.22E-03 5.71E-03 2.05E-02 U CF NBF 281029012 6/29/2011 1-131 6.40E-03 7.36E-03 2.69E-02 U CF SBN 281029013 6/29/2011 1-131 -4. 1OE-03 4.10E-03 1.09E-02 U CF DOW 281029014 6/29/2011 1-131 -3.76E-03 4.87E-03 1.41E-02 U CF COL 281029015 6/29/2011 1-131 9.22E-04 8.59E-03 2.88E-02 U CF ONS-1 281029016 6/29/2011 1-131 1.42E-02 7.59E-03 2.72E-02 U CF ONS-2 281029017 6/29/2011 1-131 4.13E-03 3.99E-03 1.52E-02 U D-38

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF ONS-3 281029018 6/29/2011 1-131 -1.06E-02 6.15E-03 1.30E-02 CF ONS-4 281029019 6/29/2011 *1-131 -1.76E-03 3.66E-03 1.12E-02 CF ONS-5 281029020 6/29/2011 1-131 4.43E-03 5.34E-03 1.93E-02 CF ONS-6 281029021 6/29/2011 1-131 3.43E-03 5.55E-03 2.03E-02 CF NBF 281623012 7/6/2011 1-131 -1.30E-03 5.12E-03 1.68E-02 CF SBN 281623013 7/6/2011 1-131 -2.70E-03 7.02E-03 2.13E-02 CF DOW 281623014 7/6/2011 1-131 -5.10E-03 6.61E-03 1.94E-02 CF COL 281623015 7/6/2011 1-131 -1.92E-03 1.02E-02 3.27E-02 CF ONS-1 281623016 7/6/2011 1-131 -1.14E-02 6.61E-03 1.51E-02 CF ONS-2 281623017 7/6/2011 1-131 1.00E-03 7.07E-03 2.42E-02 CF ONS-3 281623018 7/6/2011- 1-131 -8.99E-03 1.38E-02 4.13E-02 CF ONS-4 281623019 7/6/2011 1-131 -4.51E-03 7.25E-03 2.21E-02 CF ONS-5 281623020 7/6/2011 1-131 6.29E-03 5.17E-03 1.84E-02 CF ONS-6 281623021 7/6/2011 1-131 3.20E-03 4.44E-03 1.56E-02 CF NBF 282125012 7/13/2011 1-131 1.03E-02 6.81E-03 2.49E-02 CF SBN 282125013 7/13/2011 1-131 -7.31E-03 6.31E-03 1.65E-02 CF DOW 282125014 7/13/2011 1-131 -6.06E-03 6.63E-03 1.65E-02 CF COL 282125015 7/13/2011 1-131 -6.56E-03 6.65E-03 1.84E-02 CF ONS-1 282125016 7/13/2011 1-131 -5.26E-03 6.74E-03 1.96E-02 CF ONS-2 282125017 7/13/2011 1-131 -1.92E-03 7.19E-03 2.20E-02 CF ONS-3 282125018 7/13/2011 1-131 -4.08E-03 6.39E-03 1.86E-02 CF ONS-4 282125019 7/13/2011 1-131 8.48E-03 6.52E-03 2.48E-02 CF ONS-5 282125020 7/13/2011 1-131 4.07E-04 6.40E-03 2.12E-02 CF ONS-6 282125021 7/13/2011 1-131 2.92E-03 6.74E-03 2.39E-02 CF NBF 282602012 7/20/2011 1-131 5.51E-06 4.73E-03 1.57E-02 CF SBN 282602013 7/20/2011 1-131 4.50E-03 7.34E-03 2.61E-02 CF DOW 282602014 7/20/2011 1-131 2.36E-03 6.38E-03 2.16E-02 CF COL 282602015 7/20/2011 1-131 8.10E-05 7.38E-03 2.41E-02 CF ONS-1 282602016 7/20/2011 1-131 5.72E-03 6.62E-03 2.40E-02 CF ONS-2 282602017 7/20/2011 1-131 -1.78E-03 5.64E-03 1.82E-02 CF ONS-3 282602018 7/20/2011 1-131 5.56E-03 8.16E-03 2.92E-02 CF ONS-4 282602019 7/20/2011 1-131 -7.28E-03 6.90E-03 1.89E-02 CF ONS-5 282602020 7/20/2011 1-131 1.35E-04 1.02E-02 3.37E-02 CF ONS-6 282602021 7/20/2011 1-131 5.16E-03 5.91E-03 2.25E-02 CF NBF 283038012 7/27/2011 1-131 9.05E-03 7.03E-03 2.63E-02 CF SBN 283038013 7/27/2011 1-131 4.36E-03 4.24E-03 1.69E-02 CF DOW 283038014 7/27/2011 1-131 -4.59E-03 5.71 E-03 1.68E-02 CF COL 283038015 7/27/2011 1-131 3.02E-03 5.05E-03 1.82E-02 CF ONS-1 283038016 7/27/2011 1-131 6.04E-03 5.75E-03 2.10E-02 CF ONS-2 283038017 7/27/2011 1-131 3.49E-03 7.3 1E-03 2.60E-02 CF ONS-3 283038018 7/27/2011 1-131 -3.34E-03 5.16E-03 1.43E-02 CF ONS-4 283038019 7/27/2011 1-131 3.26E-03 4.90E-03 1.74E-02 CF ONS-5 283038020 7/27/2011 1-131 8.34E-06 3.76E-03 1.23E-02 CF ONS-6 283038021 7/27/2011 1-131 -4.39E-03 4.41E-03 1.08E-02 CF NBF 283532012 8/3/2011 1-131 1.73E-03 3.58E-03 1.28E-02 CF SBN 283532013 8/3/2011 1-131 3.57E-03 5.90E-03 2.03E-02 CF DOW 283532014 8/3/2011 1-131 9.90E-03 9.32E-03 3.34E-02 CF COL 283532015 8/3/2011 1-131 8.92E-03 6.01E-03 2.27E-02 CF ONS-1 283532016 8/3/2011 1-131 -2.68E-03 3.44E-03 1.00E-02 CF ONS-2 283532017 8/3/2011 1-131 -1.60E-03 4.48E-03 1.38E-02 CF ONS-3 283532018 8/3/2011 1-131 8.75E-03 5.53E-03 1.97E-02 D-39

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF ONS-4 283532019 8/3/2011 1-131 -1.87E-03 8.59E-03 2.84E-02 U CF ONS-5 283532020 8/3/2011 1-131 5.81 E-03 7.03E-03 2.52E-02 U CF ONS-6 283532021 8/3/2011 1-131 -3.74E-03 4.13E-03 1.20E-02 U CF NBF 283976012 8/10/2011 1-131 -1.98E-03 7.04E-03 2.18E-02 U CF SBN 283976013 8/10/2011 1-131 -8.14E-03 6.30E-03 1.53E-02 U CF DOW 283976014 8/10/2011 1-131 -6.OOE-03 7.02E-03 1.96E-02 U CF COL 283976015 8/10/2011 1-131 -1.09E-02 1.07E-02 3.16E-02 U CF ONS-1 283976016 8/10/2011 1-131 1.90E-03 3.99E-03 1.45E-02 U CF ONS-2 283976017 8/10/2011 1-131 -5.14E-03 4.37E-03 1.12E-02 U CF ONS-3 283976018 8/10/2011 1-131 -1.04E-02 6.58E-03 1.57E-02 U CF ONS-4 283976019 8/10/2011 1-131 6.97E-03 5.20E-03 2.02E-02 U CF ONS-5 283976020 8/10/2011 1-131 -2.01E-04 7.14E-03 2.40E-02 U CF ONS-6 283976021 8/10/2011 1-131 -3.12E-03 1.08E-02 3.41 E-02 U CF NBF" 284443012 8/17/2011 1-131 -3.12E-03 4.88E-03 1.47E-02 U CF SBN 284443013 8/17/2011 1-131 3.08E-03 5.70E-03 1.97E-02 U CF DOW 284443014 8/17/2011 1-131 1.09E-03 4.75E-03 1.61E-02 U CF COL 284443015 8/17/2011 1-131 -6.84E-03 5.95E-03 1.64E-02 U CF ONS-1 284443016 8/17/2011 1-131 7.23E-03 5.55E-03 1.98E-02 U CF ONS-2 284443017 8/17/2011 1-131 -5.12E-03 5.50E-03 1.48E-02 U CF ONS-3 284443018 8/17/2011 1-131 1.58E-03 6.21E-03 2.14E-02 U CF ONS-4 284443019 8/17/2011 1-131 -4.3 1E-04 6.47E-03 2.12E-02 U CF ONS-5 284443020 8/17/2011 1-131 6.98E-03 5.84E-03 2.07E-02 U CF ONS-6 284443021 8/17/2011 1-131 -3.01E-03 4.31E-03 1.29E-02 U CF NBF 284846012 8/24/2011 1-131 1.72E-03 4.14E-03 1.42E-02 U CF SBN 284846013 8/24/2011 1-131 1.01E-03 4.48E-03 1.54E-02 U CF DOW 284846014 8/24/2011 1-131 2.13E-03 4.69E-03 1.63E-02 U CF COL 284846015 8/24/2011 1-131 4.04E-03 4.33E-03 1.48E-02 U CF ONS-1 284846016 8/24/2011 1-131 1.28E-02 5.47E-03 1.85E-02 U CF ONS-2 284846017 8/24/2011 1-131 3.52E-04 4.24E-03 1.44E-02 U CF ONS-3 284846018 8/24/2011 1-131 -2.68E-03 4.80E-03 1.49E-02 U CF ONS-4 284846019 8/24/2011 1-131 2.12E-03 4.95E-03 1.69E-02 U CF ONS-5 284846020 8/24/2011 1-131 -4.43E-03 3.75E-03 1.09E-02 U CF ONS-6 284846021 8/24/2011 1-131 -2.27E-03 3.31E-03 9.76E-03 U CF NBF 285176012 8/31/2011 1-131 6.12E-03 4.05E-03 1.45E-02 U CF SBN 285176013 8/31/2011 1-131 2.03E-04 4.02E-03 1.32E-02 U CF DOW 285176014 8/31/2011 1-131 4.23E-03 4.35E-03 1.54E-02 U CF COL 285176015 8/31/2011 1-131 -3.52E-03 5.01E-03 1.55E-02 U CF ONS-1 285176016 8/31/2011 1-131 3.72E-03 3.33E-03 1.21E-02 U CF ONS-2 285176017 8/31/2011 1-131 -5.73E-03 3.45E-03 8.15E-03 U CF ONS-3 285176018 8/31/2011 1-131 -6.75E-04 3.99E-03 1.31E-02 U CF ONS-4 285176019 8/31/2011 1-131 -7.66E-03 3.78E-03 7.5 1E-03 U CF ONS-5 285176020 8/31/2011 1-131 3.15E-04 4.21E-03 1.43E-02 U CF ONS-6 285176021 8/31/2011 1-131 1.65E-04 3.22E-03 1.09E-02 U CF NBF 285555012 9/7/2011 1-131 -4.65E-04 4.79E-03 1.55E-02 U CF SBN 285555013 9/7/2011 1-131 -3.05E-03 7.14E-03 2.34E-02 U CF DOW 285555014 9/7/2011 1-131 4.55E-03 3.45E-03 1.23E-02 U CF COL 285555015 9/7/2011 1-131 3.05E-04 4.11E-03 1.38E-02 U CF ONS-1 285555016 9/7/2011 1-131 -8.19E-03 4.38E-03 1.08E-02 U CF ONS-2 285555017 9/7/2011 1-131 1.37E-03 4.38E-03 1.47E-02 U CF ONS-3 285555018 9/7/2011 1-131 4.20E-04 4.16E-03 1.41 E-02 U CF ONS-4 285555019 9/7/2011 1-131 -2.83E-03 6.93E-03 2.18E-02 U D-40

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF ONS-5 285555020 9/7/2011 1-131 1.17E-03 4.38E-03 1.49E-02 U CF ONS-6 285555021 9/7/2011 1-131 3.97E-03 4.18E-03 1.51E-02 U CF NBF 286154012 9/14/2011 1-131 -8.71E-03 5.86E-03 1.41E-02 U CF SBN 286154013 9/14/2011 1-131 1.20E-03 5.56E-03 1.86E-02 U CF DOW 286154014 9/14/2011 1-131 -4.06E-03 4.78E-03 1.37E-02 U CF COL 286154015 9/14/2011 1-131 -3.49E-03 5.7 1E-03 1.78E-02 U CF ONS-1 286154016 9/14/2011 1-131 3.02E-03 4.59E-03 1.60E-02 U CF ONS-2 286154017 9/14/2011 1-131 5.39E-03 6.1OE-03 2.19E-02 U CF ONS-3 286154018 9/14/2011 1-131 -3.03E-03 3.85E-03 1.04E-02 U CF ONS-4 286154019 9/14/2011 1-131 3.25E-04 4.63E-03 1.52E-02 U CF ONS-5 286154020 9/14/2011 1-131 8.50E-03 8.72E-03 3.05E-02 U CF ONS-6 286154021 9/14/2011 1-131 1.18E-02 6.59E-03 2.36E-02 U CF NBF 286489012 9/21/2011 1-131 5.05E-04 .3.31E-03 1.1OE-02 U CF SBN 286489013 9/21/2011 1-131 -7.02E-03 5.03E-03 1.30E-02 U CF DOW 286489014 9/21/2011 1-131 -7.08E-04 6.OOE-03 2.01E-02 U CF COL 286489015 9/21/2011 1-131 3.47E-03 3.23E-03 1.14E-02 U CF ONS-1 286489016 9/21/2011 1-131 4.38E-03 3.72E-03 1.27E-02 U CF ONS-2 286489017 9/21/2011 1-131 2.93E-03 3.64E-03 1.28E-02 U CF ONS-3 286489018 9/21/2011 1-131 -6.12E-04 4.22E-03 1.39E-02 U CF ONS-4 286489019 9/21/2011 1-131 5.82E-04 2.52E-03 8.59E-03 U CF ONS-5 286489020 9/21/2011 1-131 9.68E-04 4.33E-03 1.44E-02 U CF ONS-6 286489021 9/21/2011 1-131 9.05E-04 6.13E-03 2.02E-02 U CF NBF 286954012 9/28/2011 1-131 -1.17E-03 4.57E-03 1.45E-02 U CF SBN 286954013 9/28/2011 1-131 -5.55E-03 7.14E-03 2.13E-02 U CF DOW 286954014 9/28/2011 1-131 -1l.38E-04 3.83E-03 1.27E-02 U CF COL 286954015 9/28/2011 1-131 9.43E-03 5.39E-03 1.96E-02 U CF ONS-1 286954016 9/28/2011 1-131 -1.85E-03 3.07E-03 9.69E-03 U CF ONS-2 286954017 9/28/2011 1-131 3.50E-03 3.66E-03 1.33E-02 U CF ONS-3 286954018 9/28/2011 1-131 1.25E-03 3.85E-03 1.29E-02 U CF ONS-4 286954019 9/28/2011 1-131 2.92E-03 3.30E-03 1.18E-02 U CF ONS-5 286954020 9/28/2011 1-131 6.60E-03 3.95E-03 1.41E-02 U CF ONS-6 286954021 9/28/201.1 1-131 -5.07E-04 2.55E-03 8.03E-03 U CF NBF 287655012 10/5/2011 1-131 3.02E-03 4.04E-03 1.39E-02 U CF SBN 287655013 10/5/2011 1-131 2.40E-03 3.13E-03 1.11E-02 U CF DOW 287655014 10/5/2011 1-131 -4.97E-03 4.43E-03 1.27E-02 U CF COL 287655015 10/5/2011 1-131 1.79E-04 2.85E-03 9.59E-03 U CF ONS-1 287655016 10/5/2011 1-131 -4.33E-03 4.03E-03 1.07E-02 U CF ONS-2 287655017 10/5/2011 1-131 -1.04E-03 3.75E-03 1.21E-02 U CF ONS-3 287655018 10/5/2011 1-131 -1.63E-03 6.31E-03 2.09E-02 U CF ONS-4 287655019 10/5/2011 1-131 8.78E-03 5.12E-03 1.86E-02 U CF ONS-5 287655020 10/5/2011 1-131 -2.93E-03 1.17E-02 3.85E-02 U CF ONS-6 287655021 10/5/2011 1-131 2.02E-03 3.81E-03 1.28E-02 U CF, NBF 288123012 10/12/2011 1-131 2.05E-03 5.84E-03 2.02E-02 U CF SBN 288123013 10/12/2011 1-131 -5.04E-03 3.64E-03 9.52E-03 U CF DOW 288123014 10/12/2011 1-131 6.33E-03 4.52E-03 1.65E-02 U CF COL 288123015 10/12/2011 1-131 8.95E-04 3.97E-03 1.36E-02 U CF ONS-1 288123016 10/12/2011 1-131 -1.28E-02 7.34E-03 1.97E-02 U CF ONS-2 288123017 10/12/2011 1-131 7.09E-03 3.90E-03 1.39E-02 U CF ONS-3 288123018 10/12/2011 1-131 1.43E-03 4.37E-03 1.53E-02 U CF ONS-4 288123019 10/12/2011 1-131 -1.05E-02 5.07E-03 9.79E-03 U CF ONS-5 288123020 10/12/2011 1-131 -1.04E-02 1.06E-02 2.90E-02 U D-41

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF ONS-6 288123021 10/12/2011 1-131 2.51E-04 . 5.75E-03 1.95E-02 U CF NBF 288553012 10/19/2011 1-131 -8.75E-03 5.97E-03 1.66E-02 U CF SBN 288553013 10/19/2011 1-131 3.42E-03 4.33E-03 1.55E-02 U CF DOW 288553014 10/19/2011 1-131 -3.54E-03 4.57E-03 1.40E-02 U CF COL 288553015 10/19/2011 1-131 -1.33E-03 3.14E-03 1.01E-02 U CF ONS-1 288553016 10/19/2011 1-131 -1.93E-03 6.40E-03 2.04E-02 U CF ONS-2 288553017 10/19/2011 1-131 6.42E-03 4.16E-03 1.51E-02 U CF ONS-3 288553018 10/19/2011 1-131 2.5 11E-03 4.22E-03 1.50E-02 U CF ONS-4 288553019 10/19/2011 1-131 8.54E-04 3.50E-03 1.20E-02 U CF ONS-5 288553020 10/19/2011 1-131 -1.46E-02 8.37E-03 2.21E-02 U CF ONS-6 288553021 10/19/2011 1-131 -8.52E-05 3.67E-03 1.22E-02 U CF NBF 289108012 10/26/2011 1-131 -1.03E-02 7.72E-03 2.25E-02 U CF SBN 289108013 10/26/2011 1-131 1.24E-02 6.66E-03 2.36E-02 U CF DOW 289108014 10/26/2011 1-131 4.55E-03 5.OOE-03 1.76E-02 U CF COL 289108015 10/26/2011 1-131 4.61E-03 4.17E-03 1.55E-02 U CF ONS-1 289108016 10/26/2011 1-131 -4.25E-04 3.28E-03 1.05E-02 U CF ONS-2 289108017 10/26/2011 1-131 -2.16E-03 4.68E-03 1.47E-02 U CF ONS-3 289108018 10/26/2011 1-131 -5.34E-03 4.04E-03 9.49E-03 U CF ONS-4 289108019 10/26/2011 1-131 -1.87E-03 4.40E-03 1.33E-02 U CF ONS-5 289108020 10/26/2011 1-131 4.65E-03 4.79E-03 1.70E-02 U CF ONS-6 289108021 10/26/2011 1-131 -4.73E-03 7.63E-03 2.44E-02 U CF NBF 289618012 11/2/2011 1-131 4.37E-03 3.44E-03 1.22E-02 U CF SBN 289618013 11/2/2011 1-131 2.12E-03 5.27E-03 1.81E-02 U CF DOW 289618014 11/2/2011 1-131 1.39E-02 7.44E-03 2.63E-02 U CF COL 289618015 11/2/2011 1-131 3.07E-04 6.19E-03 2.10E-02 U CF ONS-1 289618016 11/2/2011 1-131 -5.87E-04 4.01E-03 1.27E-02 U CF ONS-2 289618017 11/2/2011 1-131 -1.92E-03 6.44E-03 2.13E-02 U CF ONS-3 289618018 11/2/2011 1-131 2.42E-03 3.05E-03 1.08E-02 U CF ONS-4 289618019 11/2/2011 1-131 -3.04E-03 2.88E-03 7.15E-03 U CF ONS-5 289618020 11/2/2011 1-131 2.74E-04 3.111E-03 1.04E-02 U CF ONS-6 289618021 11/2/2011 1-131 3.99E-03 4.19E-03 1.46E-02 U CF NBF 290101012 11/9/2011 1-131 6.89E-03 ,5.98E-03 2.111E-02 U CF SBN 290101013 11/9/2011 1-131 4.28E-04 3.43E-03 1.17E-02 U CF DOW 290101014 11/9/2011 1-131 -1.00E-03 3.42E-03 1.12E-02 U CF COL 290101015 11/9/2011 1-131 -5.18E-03 3.92E-03 9.72E-03 U CF ONS-1 290101016 114/9'/2011 1-131 -3.78E-03 4.33E-03 1.311E-02 U CF ONS-2 290101017 11/9/2011 1-131 2.70E-03 4.58E-03 1.60E-02 U CF ONS-3 290101018 11/9/2011 1-131 4.68E-04 4.36E-03 1.46E-02 U CF ONS-4 290101019 11/9/2011 1-131 1.03E-02 4.77E-03 1.67E-02 U CF ONS-5 290101020 11/9/2011 1-131 -7.53E-03 6.53E-03 1.95E-02 U CF ONS-6 290101021 11/9/2011 1-131 -5.34E-04 4.27E-03 1.43E-02 U CF NBF 290614012 11/16/2011 1-131 -1.23E-03 4.55E-03 1.39E-02 U CF SBN 290614013 11/16/2011 1-131 1.09E-02 6.62E-03 2.43E-02 U CF DOW 290614014 11/16/2011 1-131 -4.81E-03 4.70E-03 1.19E-02 U CF COL 290614015 11/16/2011 1-131 -4.34E-04 4.45E-03 1.45E-02 U CF ONS-1 290614016 11/16/2011 1-131 2.55E-04 5.82E-03 1.91E-02 U CF ONS-2 290614017 11/16/2011 1-131 -1.60E-03 5.68E-03 1.83E-02 U CF ONS-3 290614018 11/16/2011 1-131 -2.35E-03 5.01E-03 1.51E-02 U CF ONS-4 290614019 11/16/2011 1-131 4.28E-03 6.52E-03 2.34E-02 U CF ONS-5 290614020 11/16/2011 1-131 3.62E-03 6.2 11E-03 2.18E-02 U CF ONS-6 290614021 11/16/2011 1-131 -1.39E-02 7.83E-03 1.60E-02 U D-42

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF NBF 290961012 11/22/2011 1-131 -4.89E-04 2.67E-03 8.77E-03 U CF SBN 290961013 11/22/2011 1-131 -4.51E-04 2.48E-03 8.36E-03 U CF DOW 290961014 11/22/2011 1-131 -1.32E-03 1.48E-03 4.64E-03 U CF COL 290961015 11/22/2011 1-131 -2.52E-03 7.87E-03 2.52E-02 U CF ONS-1 290961016 11/22/2011 1-131 2.45E-03 8.10E-03 2.77E-02 U CF ONS-2 290961017 11/22/2011 1-131 -2.70E-03 5.36E-03 1.70E-02 U CF ONS-3 290961018 11/22/2011 1-131 -7.19E-04 7.64E-03 2.50E-02 U CF ONS-4 290961019 11/22/2011 1-131 -1.25E-02 5.94E-03 1.23E-02 U CF ONS-5 290961020 11/22/2011 1-131 6.14E-03 7.84E-03 2.71E-02 U CF ONS-6 290961021 11/22/2011 1-131 3.08E-03 3.61E-03 1.30E-02 U CF NBF 291277012 11/30/2011 1-131 -7.05E-04 4.95E-03 1.59E-02 U CF SBN 291277013 11/30/2011 1-131 1.76E-03 3.95E-03 1.33E-02 U CF DOW 291277014 11/30/2011 1-131 3.78E-03 3.54E-03 1.26E-02 U CF COL 291277015 11/30/2011 1-131 -5.96E-03 3.14E-03 7.53E-03 U CF ONS-1 291277016 11/30/2011 1-131 -2.99E-03 3.OOE-03 8.27E-03 U CF ONS-2 291277017 11/30/2011 1-131 1.31E-03 2.77E-03 9.59E-03 U CF ONS-3 291277018 11/30/2011 1-131 -4.20E-04 4.29E-03 1.44E-02 U CF ONS-4 291277019 11/30/2011 1-131 6.65E-04 3.49E-03 1.16E-02 U CF ONS-5 291277020 11/30/2011 1-131 -2.07E-03 3.52E-03 1.1OE-02 U CF ONS-6 291277021 11/30/2011 1-131 4.35E-03 5.76E-03 2.03E-02 U CF NBF 291748012 12/7/2011 1-131 1.32E-02 1.13E-02 4.01E-02 U CF SBN 291748013 12/7/2011 1-131 -7.93E-03 5.51E-03 1.26E-02 U CF DOW 291748014 12/7/2011 1-131 -5.25E-03 4.91 E-03 1.34E-02 U CF COL 291748015 12/7/2011 1-131 -1.84E-03 4.25E-03 1.32E-02 U CF ONS-1 291748016 12/7/2011 1-131 7.30E-03 7.29E-03 2.76E-02 U CF ONS-2 291748017 12/7/2011 1-131 -9.43E-03 6.25E-03 1.43E-02 U CF ONS-3 291748018 12/7/2011 1-131 -2.94E-03 8.69E-03 2.83E-02 U CF ONS-4 291748019 12/7/2011 1-131 7.85E-03 6.50E-03 2.45E-02 U CF ONS-5 291748020 12/7/2011 1-131 6.54E-03 5.97E-03 2.10E-02 U CF ONS-6 291748021 12/7/2011 1-131 -4.94E-03 7.14E-03 2.16E-02 U CF NBF 292211012 12/14/2011 1-131 -9.51E-03 1.04E-02 2.89E-02 U CF SBN 292211013 12/14/2011 1-131 8.60E-03 5.66E-03 2.26E-02 U CF DOW 292211014 12/14/2011 1-131 1.22E-02 6.69E-03 2.37E-02 U CF COL 292211015 12/14/2011 1-131 2.36E-03 5.75E-03 2.04E-02 U CF ONS-1 292211016 12/14/2011 1-131 5.69E-03 8.05E-03 2.93E-02 U CF ONS-2 292211017 12/14/2011 1-131 -5.06E-03 4.63E-03 1.07E-02 U CF ONS-3 292211018 12/14/2011 1-131 1.67E-04 4.20E-03 I.41E-02 U CF ONS-4 292211019 12/14/2011 1-131 -1.28E-02 8.65E-03 1.76E-02 U CF ONS-5 292211020 12/14/2011 1-131. 1.17E-03 5.10E-03 1.72E-02 U CF ONS-6 292211021 12/14/2011 1-131 -8.56E-04 5.62E-03 1.83E-02 U CF NBF 292714012 12/21/2011 1-131 7.23E-03 6.78E-03 2.38E-02 U CF SBN 292714013 12/21/2011 1-131 -6.71E-03 1.13E-02 3.61E-02 U CF DOW 292714014 12/21/2011 1-131 -1.40E-02 8.16E-03 1.95E-02 U CF COL 292714015 12/21/2011 1-131 4.79E-03 7.58E-03 2.63E-02 U CF ONS-1 292714016 12/21/2011 1-131 -6.12E-03 6.90E-03 2.00E-02 U CF ONS-2 292714017 12/21/2011 1-131 2.33E-02 1.26E-02 4.26E-02 U CF ONS-3 292714018 12/21/2011 1-131 -1.90E-03 5.22E-03 1.62E-02 -U CF ONS-4 292714019 12/21/2011 1-131 8.57E-03 6.96E-03 2.52E-02 U CF ONS-5 292714020 12/21/2011 1-131 2.36E-02 1.18E-02 4.20E-02 U CF ONS-6 292714021 12/21/2011 1-131 -6.26E-03 6.26E-03 1.77E-02 U CF 12/28/2011 NBF 292858012 1-131 -2. 1OE-03 5.82E-03 1.93E&02 U D-43

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF SBN 292858013 12/28/2011 1-131 3.45E-03 3.45E-03 1.20E-02 U CF DOW 292858014 12/28/2011 1-131 7.86E-03 6.04E-03 2.11E-02 U CF COL 292858015 12/28/2011 1-131 -5.16E-03 6.40E-03 2.04E-02 U CF ONS-1 292858016 12/28/2011 1-131 2.74E-03 3.17E-03 1. IOE-02 U CF ONS-2 292858017 12/28/2011 1-131 7.15E-04 6.26E-03 2.08E-02 U CF ONS-3 292858018 12/28/2011 1-131 4.3 1E-04 5.22E-03 1.77E-02 U CF ONS-4 292858019 12/28/2011 1-131 -3.46E-03 3.38E-03 1.04E-02 U CF ONS-5 292858020 12/28/2011 1-131 -6.24E-03 5.23E-03 1.46E-02 U CF ONS-6 292858021 12/28/2011 1-131 -2.24E-03 3.09E-03 9.82E-03 U D-44

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH OFS-N 279803001 6/8/2011 Ac-228 -1.73E+00 5.97E+00 1f.32E+01 U FH OFS-N 279803001 6/8/2011 Ag-108m -5.97E-02 7.66E-01 2.5 1E+00 U FH OFS-N 279803001 6/8/2011 Ag-il0m -1.72E+00 1.11E+00 2.88E+00 U FH OFS-N 279803001 6/8/2011 Ba-140 -7.19E-01 4.72E+00 1.54E+01 U FH OFS-N 279803001 6/8/2011 Be-7 -1.25E+01 1.05E+01 3.19E+01 U FH OFS-N 279803001 6/8/2011 Ce- 141 -8.86E+00 3.94E+00 7.37E+00 U FH OFS-N 279803001 6/8/2011 Ce- 144 1.52E+00 5.70E+00 1.86E+01 U FH OFS-N 279803001 6/8/2011 Co-57 7.64E-01 7.68E-01 2.48E+00 U FH OFS-N 279803001 6/8/2011 Co-58 -1.18E+00 1.20E+00 3.77E+00 U FH OFS-N 279803001 6/8/2011 Co-60 -4.48E-01 1.11E+00 3.66E+00 U FH OFS-N 279803001 6/8/2011 Cr-51 -2.17E+01 1.44E+01 4.38E+01 U FH OFS-N 279803001 6/8/2011 Cs-134 1.25E+00 1.18E+00 3.90E+00 U FH OFS-N 279803001 6/8/2011 Cs-137 3.69E+01 2.67E+00 3.21E+00 M FH OFS-N 279803001 6/8/2011 Fe-59 -4.80E+00 3.53E+00 1.04E+01 U FH OFS-N 279803001 6/8/2011 1-131 3.36E+00 1.07E+01 3.56E+01 U FH OFS-N 279803001 6/8/2011 K-40 3.31E+03 1.67E+02 2.87E+01 FH OFS-N 279803001 6/8/2011 La-140 -7.19E-01 4.72E+00 1.54E+01 U FH OFS-N 279803001 6/8/2011 Mn-54 1.46E+00 1.00E+00 3.23E+00 U FH OFS-N 279803001 6/8/2011 Nb-95 2.92E-01 1.13E+00 3177E+00 U FH OFS-N 279803001 6/8/2011 Ru-103 -7.26E-01 1.38E+00 4.38E+00 U FH OFS-N 279803001 6/8/2011 Ru-106 2.46E+00 8.07E+00 2.74E+01 U FH OFS-N 279803001 6/8/2011 Sb-124 -1.93E+00 2.49E+00 7.68E+00 U FH OFS-N 279803001 6/8/2011 Sb-125 -1.92E+00 2.47E+00 7.87E+00 U FH OFS-N 279803001 6/8/2011 Se-75 -1.13E+00 1.29E+00 4.22E+00 U FH OFS-N 279803001 6/8/2011 Th-228 1.37E+00 2.93E+00 5.50E+00 U FH OFS-N 279803001 6/8/2011 Zn-65 2.07E+00 2.76E+00 8.95E+00 U FH OFS-N 279803001 6/8/2011 Zr-95 -7.76E-01 1.96E+00 6.45E+00 U FH ONS-N 279803002 6/8/2011 Ac-228 -5.53E-01 6.36E+00 1.53E+01 U FH ONS-N 279803002 6/8/2011 Ag-108m -2.46E+00 1.03E+00 2.63E+00 U FH ONS-N 279803002 6/8/2011 Ag-Il0m 6.89E-01 1.13E+00 3.28E+00 U FH ONS-N 279803002 6/8/2011 Ba- 140 -2.80E-01 5.04E+00 1.68E+01 U FH ONS-N 279803002 6/8/2011 Be-7 1.36E+01 1.12E+01 3.55E+01 U FH ONS-N 279803002 6/8/2011 Ce- 141 2.16E+00 2.40E+00 7.67E+00 U FH ONS-N 279803002 6/8/2011 Ce- 144 -6.58E-01 5.61E+00 1.82E+01 U FH ONS-N 279803002 6/8/2011 Co-57 -8.93E-01 7.48E-01 2.31E+00 U FH ONS-N 279803002 6/8/2011 Co-58 -2.25E+00 1.46E+00 4.27E+00 U FH ONS-N 279803002 6/8/2011 Co-60 1.92E+00 1.40E+00 4.49E+00 U FH ONS-N 279803002 6/8/2011 Cr-51 9.59E+00 1.47E+01 4.85E+01 U FH ONS-N 279803002 6/8/2011 Cs-134 1.39E+00 1.34E+00 4.35Et00 U FH ONS-N 279803002 6/8/2011 Cs-137 6.55E+00 2.38E+00 3.29E+00 UI M FH ONS-N 279803002 6/8/2011 Fe-59 -1.18E+00 3.72E+00 1.22E+01 U FH ONS-N 279803002 6/8/2011 1-131 -1.34E+00 1.1IE+01 3.61E+01 U FH ONS-N 279803002 6/8/2011 K-40 3.16E+03 1.64E+02 3.12E+01 FH ONS-N 279803002 6/8/2011 La-140 -2.80E-01 5.04E+00 1.68E+01 U FH ONS-N 279803002 6/8/2011 Mn-54 -9.94E-01 1.11E+00 3.43E+00 U FH ONS-N 279803002 6/8/2011 Nb-95 2.74E+00 2.02E+00 3.98E+00 U FH ONS-N 279803002 6/8/2011 Ru- 103 1.33E+00 1.43E+00 4.78E+00 U FH ONS-N 279803002 6/8/2011 Ru-106 -1.08E+01 9.54E+00 2.99E+01 U FH ONS-N 279803002 6/8/2011 Sb-124 -3.82E+00 2.74E+00 7.99E+00 U FH ONS-N 279803002 6/8/2011 Sb-125 -4.43E+00 2.81E+00 8.18E+00 U FH ONS-N 279803002 6/8/2011 Se-75 1.31E+00 1.33E+00 4.38E+00 U D-45

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH ONS-N 279803002 6/8/2011 Th-228 -3.16E+00 2.47E+00 5.40E+00 U FH ONS-N 279803002 6/8/2011 Zn-65 -5.07E+00 3.16E+00 9.34E+00 U FH ONS-N 279803002 6/8/2011 Zr-95 2.23E+00 2.43E+00 7.93E+00 U FH ONS-S 279803003 6/8/2011 Ac-228 -5.08E+00 6.25E+00 1.61E+01 U FH ONS-S 279803003 6/8/2011 Ag-108m 3.80E-01 8.98E-01 2.94E+00 U FH ONS-S 279803003 6/8/2011 Ag-il0m 1.25E+00 1.15E+00 3.35E+00 U FH ONS-S 279803003 6/8/2011 Ba-140 -5.24E-01 5.80E+00 1.89E+01 U FH ONS-S 279803003 6/8/2011 Be-7 -8.72E-01 1.17E+01 3.78E+01 U FH ONS-S 279803003 6/8/2011 Ce-141 5.80E+00 2.80E+00 8.14E+00 U FH ONS-S 279803003 6/8/2011 Ce-144 4.08E+00 6.15E+00 1.98E+01 U FH ONS-S 279803003 6/8/2011 Co-57 1.24E+00 8.40E-01 2.62E+00 U FH ONS-S 279803003 6/8/2011 Co-58 -4.82E-01 1.24E+00 4.03E+00 U FH ONS-S 279803003 6/8/2011 Co-60 2.25E+00 1.38E+00 4.47E+00 U FH ONS-S 279803003 6/8/2011 Cr-51 1.46E+01 1.63E+01 5.37E+01 U FH ONS-S 279803003 6/8/2011 Cs-134 1.69E+00 1.38E+00 4.49E+00 U FH ONS-S 279803003 6/8/2011 Cs-137 3.60E+01 3.15E+00 3.28E+00 M FH ONS-S 279803003 6/8/2011 Fe-59 -3.14E+00 3.83E+00 1.18E+01 U FH ONS-S 279803003 6/8/2011 1-131 2.15E+01 1.31E+01 4.1OE+01 U FH ONS-S 279803003 6/8/2011 K-40 3.21E+03 1.70E+02 2.90E+01 FH ONS-S 279803003 6/8/2011 La-140 -5.24E-01 5.80E+00 1.89E+01 U FH ONS-S 279803003 6/8/2011 Mn-54 -1.09E+00 1.06E+00 3.29E+00 U FH ONS-S 279803003 6/8/2011 Nb-95 1.36E+00 1.37E+00 4.53E+00 U FH ONS-S 279803003 6/8/2011 Ru-103 -3.38E+00 1.76E+00 4.77E+00 U FH ONS-S 279803003 6/8/2011 Ru-106 -5.80E+00 9.39E+00 3.08E+01 U FH ONS-S 279803003 6/8/2011 Sb-124 2.22E+00 2.96E+00 9.87E+00 U FH ONS-S 279803003 6/8/2011 Sb-125 -2.96E+00 2.75E+00 8.48E+00 U FH ONS-S 279803003 6/8/2011 Se-75 4.17E-01 1.38E+00 4.65E+00 U FH ONS-S 279803003 6/8/2011 Th-228 5.34E+00 3.73E+00 6.15E+00 U FH ONS-S 279803003 6/8/2011 Zn-65 -7.05E+00 3.57E+00 9.58E+00 U FH ONS-S 279803003 6/8/2011 Zr-95 2.52E+00 2.46E+00 8.14E+00 U FH OFS-S 279803004 6/8/2011 Ac-228 -6.22E+00 8.11E+00 1.59E+01 U FH OFS-S 279803004 6/8/2011 Ag-108m -6.17E-01 9.12E-01 2.86E+00 U FH OFS-S 279803004 6/8/2011 Ag-Il0m 1.33E+00 1.25E+00 3.60E+00 U FH OFS-S 279803004 6/8/2011 Ba-140 1.91E+00 5.18E+00 1.75E+01 U FH OFS-S 279803004 6/8/2011 Be-7 1.42E+01 1.24E+01 3.92E+01 U FH OFS-S 279803004 6/8/2011 Ce-I141 -8.69E-01 2.59E+00 8.24E+00 U FH OFS-S 279803004 6/8/2011 Ce- 144 1.17E+01 6.76E+00 2.02E+01 U FH OFS-S 279803004 6/8/2011 Co-57 9.78E-01 8.15E-01 2.57E+00 U FH OFS-S 279803004 6/8/2011 Co-58 -1.24E+00 1.37E+00 4.23E+00 U FH OFS-S 279803004 6/8/2011 Co-60 -3.97E-01 1.27E+00 4.09E+00 U FH OFS-S 279803004 6/8/2011 Cr-51 8.43E+00 1.64E+01 5.40E+01 U FH OFS-S 279803004 6/8/2011 Cs-134 -2.28E-01 1.35E+00 4.37E+00 U FH OFS-S 279803004 6/8/2011 Cs-137 1.45E+01 1.91 E+00 3.47E+00 M FH OFS-S 279803004 6/8/2011 Fe-59 -9.35E-01 3.86E+00 1.27E+01 U FH OFS-S 279803004 6/8/2011 1-131 7.29E+00 1.25E+01 4.07E+01 U FH OFS-S 279803004 6/8/2011 K-40 3.17E+03 1.65E+02 3.44E+01 FH OFS-S 279803004 6/8/2011 La-140 1.91E+00 5.17E+00 1.75E+01 U FH OFS-S 279803004 6/8/2011 Mn-54 1.43E+00 1.21E+00' 3.91 E+00 U FH OFS-S 279803004 6/8/2011 Nb-95 1.81E+00 1.48E+00 4.79E+00 U FH OFS-S 279803004 6/8/2011 Ru-103 2.37E+00 1.65E+00 5.36E+00 U FH OFS-S 279803004 6/8/2011 Ru-106 -8.43E-01 9.62E+00 3.19E+01 U D-46

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH OFS-S 279803004 6/8/2011 Sb-124 -3.1OE+00 3.06E+00 9.43E+00 U FH OFS-S 279803004 6/8/2011 Sb-125 2.82E+00 2.83E+00 9.06E+00 U FH OFS-S 279803004 6/8/2011 Se-75 -1.lIE+00 1.55E+00 5.04E+00 U FH OFS-S 279803004 6/8/2011 Th-228 -8.75E-01 2.84E+00 6.68E+00 U FH OFS-S 279803004 6/8/2011 Zn-65 -9.78E+00 3.85E+00 9.51E+00 U FH OFS-S 279803004 6/8/2011 Zr-95 -3.41E-01 2.52E+00 8.21E+00 U FH TRT 14 285554001 9/1/2011 Ac-228 9.32E+00 8.41E+00 1.93E+01 U FH TRT 14 285554001 9/1/2011 Ag-108m -3.77E-01 1.28E+00 3.66E+00 U FH TRT 14 285554001 9/1/2011 Ag-Il0m 1.01E-01 1.40E+00 4.03E+00 U FH TRT 14 285554001 9/1/2011 Ba- 140 4.73E-01 2.92E+00 9.58E+00 U FH TRT 14 285554001 9/1/2011 Be-7 1.23E+01 1.21E+01 3.95E+01 U FH TRT 14 285554001 9/1/2011 Ce- 141 1.52E+00 2.42E+00 7.68E+00 U FH TRT 14 285554001 9/1/2011 Ce-I144 -5.28E+00 7.89E+00 2.46E+01 U FH TRT 14 285554001 9/1/2011 Co-57 2.58E+00 1.16E+00 3.40E+00 U FH TRT 14 285554001 9/1/2011 Co-58 -2.78E+00 1.56E+00 4.38E+00 U FH TRT 14 285554001 9/1/2011 Co-60 -3.09E+00 1.71E+00 4.69E+00 U FH TRT 14 285554001 9/1/2011 Cr-51 2.23E+01 1.37E+01 4.39E+01 U FH TRT 14 285554001 9/1/2011 Cs-134 4.87E+00 1.98E+00 5.75E+00 U FH TRT 14 285554001 9/1/2011 Cs-137 1.68E+01 3.07E+00 4.39E+00 M FH TRT 14 285554001 9/1/2011 Fe-59 -2.62E+00 3.86E+00 1.25E+01 U FH TRT 14 285554001 9/1/2011 1-131 4.38E-01 4.04E+00 1.34E+01 U FH TRT 14 285554001 9/1/2011 K-40 3.33E+03 1.58E+02 3.88E+01 FH TRT 14 285554001 9/1/2011 La-140 4.73E-01 2.92E+00 9.58E+00 U FH TRT 14 285554001 9/1/2011 Mn-54 4.99E-01 1.31E+00 4.34E+00 U FH TRT 14 285554001 9/1/2011 Nb-95 4.16E-01 1.43E+00 4.76E+00 U FH TRT 14 285554001 9/1/2011 Ru-103 4.90E-01 1.45E+00 4.73E+00 U FH TRT 14 285554001 9/1/2011 Ru-106 -5.47E+00 1.09E+01 3.57E+01 U FH TRT 14 285554001 9/1/2011 Sb-124 -5.60E-01 2.93E+00 9.69E+00 U FH TRT 14 285554001 9/1/2011 Sb-125 -3.79E+00 3.40E+00 1.05E+01 U FH TRT 14 285554001 9/1/2011 Se-75 3.08E+00 1.77E+00 5.63E+00 U FH TRT 14 285554001 9/1/2011 Th-228 3.11E+00 3.50E+00 7.53E+00 U FH TRT 14 285554001 9/1/2011 Zn-65 -4.55E+00 3.72E+00 1.14E+01 U FH TRT 14 285554001 9/1/2011 Zr-95 -8.29E-02 2.49E+00 8.24E+00 U FH SLM 14 285554002 9/1/2011 Ac-228 -1.46E-01 8.67E+00 2.19E+01 U FH SLM 14 285554002 9/1/2011 Ag-108m 1.59E-01 1.21E+00 3.93E+00 U FH SLM 14 285554002 9/1/2011 Ag- li0m -1.64E+00 1.63E+00 4.33E+00 U FH SLM 14 285554002 9/1/2011 Ba- 140 1.22E+00 3.63E+00 1.23E+01 U FH SLM 14 285554002 9/1/2011 Be-7 -5.86E+00 1.37E+01 4.31E+01 U FH SLM 14 285554002 9/1/2011 Ce- 141 -9.03E+00 4.09E+00 8.74E+00 U FH SLM 14 285554002 9/1/2011 Ce- 144 2.49E+00 7.82E+00 2.55E+01 U FH SLM 14 285554002 9/1/2011 Co-57 -2.22E-02 1.02E+00 3.34E+00 U FH SLM 14 285554002 9/1/2011 Co-58 5.51E-02 1.63E+00 5.31E+00 U FH SLM 14 285554002 9/1/2011 Co-60 -8.99E-01 1.74E+00 5.52E+00 U FH SLM 14 285554002 9/1/2011 Cr-51 1.12E+01 1.62E+01 5.36E+01 U FH SLM 14 285554002 9/1/2011 Cs-134 3.32E-03 2.20E+00 6.18E+00 U FH SLM 14 285554002 9/1/2011 Cs-137 2.50E+01 2.75E+00 4.77E+00 M FH SLM 14 285554002 9/1/2011 Fe-59 -2.49E-01 4.30E+00 1.42E+01 U FH SLM 14 285554002 9/1/2011 1-131 - 1. 16E+00 6.3 1E+00 2.06E+01 U FH SLM 14 285554002 9/1/2011 K-40 3.29E+03 1.59E+02 4.24E+01 FH SLM 14 285554002 9/1/2011 La-140 1.22E+00 3.63E+00 1.23E+01 U FH SLM 14 285554002 9/1/2011 Mn-54 -1.97E+00 1.50E+00 4.42E+00 U D-47

Donald C. Cook Nuclear Plant Annual)Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH SLM 14 285554002 9/1/2011 Nb-95 -2.65E+00 2.44E+00 5.39E+00 FH SLM 14 285554002 9/1/2011 Ru-103 -3.90E-01 1.74E+00 5.84E+00 FH SLM 14 285554002 9/1/20 11 Ru-106 -2.45E+01 1.42E+01 4.08E+01 FH SLM 14 285554002 9/1/2011 Sb-124 -4.60E-01 3.41E+00 1.12E+01 FH SLM 14 285554002 9/1/2011 Sb-125 1.14E+00 3.68E+00 1.20E+01 FH SLM 14 285554002 9/1/2011 Se-75 -1.93E+00 1.72E+00 5.44E+00 FH SLM 14 285554002 9/1/2011 Th-228 -1.26E+00 2.97E+00 7.70E+00 FH SLM 14 285554002 9/1/2011 Zn-65 -6.11E+00 4.3 1E+00 1.28E+01 FH SLM 14 285554002 9/1/2011 Zr-95 -3.57E+00 2.66E+00 7.83E+00 FH OFS-N 287658001 10/4/2011 Ac-228 1.02E+01 I .06E+01 3.61E+01 FH OFS-N 287658001 10/4/2011 Ag-108m -1.29E+00 2.07E+00 6.39E+00 FH OFS-N 287658001 10/4/2011 Ag-Il0m -2.74E+00 2.70E+00 6.90E+00 FH OFS-N 287658001 10/4/2011 Ba- 140 -7.67E+00 6.52E+00 1.75E+01 FH OFS-N 287658001 10/4/2011 Be-7 3.95E+00 2.46E+01 7.99E+01 FH OFS-N 287658001 10/4/2011 Ce- 141 -3.33E+00 4.77E+00 1.45E+01 FH OFS-N 287658001 10/4/2011 Ce-I144 -8.96E+00 1.32E+01 4.3 1E+01 FH OFS-N 287658001 10/4/2011 Co-57 -1.87E+00 1.78E+00 5.65E+00 FH OFS-N 287658001 10/4/2011 Co-58 4.79E-01 2.94E+00 9.83E+00 FH OFS-N 287658001 10/4/2011 Co-60 3.69E+00 2.96E+00 1.02E+01 FH OFS-N 287658001 10/4/2011 Cr-51 -3.90E+01 2.95E+01 8.59E+01 FH OFS-N 287658001 10/4/2011 Cs-134 3.99E+00 3.06E+00 1.06E+01 FH OFS-N 287658001 10/4/2011 Cs-137 4.56E+00 3.04E+00 9.40E+00 FH OFS-N 287658001 10/4/2011 Fe-59 2.14E+00 7.59E+00 2.52E+01 FH OFS-N 287658001 10/4/2011 1-131 2.35E+00 9.33E+00 3.08E+01 FH OFS-N 287658001 10/4/2011 K-40 3.07E+03 1.92E+02 7.74E+01 FH OFS-N 287658001 10/4/2011 La-140 -7.67E+00 6.5 1E+00 1.75E+01 FH OFS-N 287658001 10/4/2011 Mn-54 1.76E+00 2.52E+00 8.62E+00 FH OFS-N 287658001 10/4/2011 Nb-95 -1.85E+00 2.96E+00 9.27E+00 FH OFS-N 287658001 10/4/2011 Ru-103 -4.55E+00 3.18E+00 8.66E+00 FH OFS-N 287658001 10/4/2011 Ru-106 -2.65E+01 2.06E+01 6.02E+01 FH OFS-N 287658001 10/4/2011 Sb-124 4.79E+00 5.56E+00 2.01E+01 FH OFS-N 287658001 10/4/2011 Sb-125 -1.04E+00 5.90E+00 1.89E+01 FH OFS-N 287658001 10/4/2011 Se-75 3.88E+00 3.37E+00 1.12E+01 FH OFS-N 287658001 10/4/2011 Th-228 -5.67E+00 4.47E+00 1.34E+01 FH OFS-N 287658001 10/4/2011 Zn-65 -4.49E+00 7.78E+00 2.42E+01 FH OFS-N 287658001 10/4/2011 Zr-95 1.64E+00 4.92E+00 1.67E+01 FH ONS-N 287658002 10/4/2011 Ac-228 -4.82E+00 1.04E+01 3.46E+01 FH ONS-N 287658002 10/4/2011 Ag-108m -4.41E-01 2.06E+00 6.64E+00 FH ONS-N 287658002 10/4/2011 Ag- lOim 2.97E+00 2.50E+00 7.78E+00 FH ONS-N 287658002 10/4/2011 Ba-140 1.40E+00 6.75E+00 2.28E+01 FH ONS-N 287658002 10/4/2011 Be-7 -2.1OE+01 2.30E+01 6.91E+01 FH ONS-N 287658002 10/4/2011 Ce-141 4.59E+00 4.17E+00 1.35E+01 FH ONS-N 287658002 10/4/2011 Ce- 144 3.02E+00 1.29E+01 4.19E+01 FH ONS-N 287658002 10/4/2011 Co-57 3.15E+00 1.98E+00 6.27E+00 FH ONS-N 287658002 10/4/2011 Co-58 6.92E+00 3.23E+00 1.06E+01 FH ONS-N 287658002 10/4/2011 Co-60 -3.72E+00 3.02E+00 9.37E+00 FH ONS-N 287658002 10/4/2011 Cr-51 1.54E+01 2.66E+01 8.72E+01 FH ONS-N 287658002 10/4/2011 Cs-134 -2.73E+00 2.79E+00 8.411E+00 FH ONS-N 287658002 10/4/2011 Cs-137 2.88E+01 4.98E+00 7.82E+00 FH ONS-N 287658002 10/4/2011 Fe-59 3.09E+00 6.94E+00 2.3 11E+01 FH ONS-N 287658002 10/4/2011 1-131 -3.93E+00 1.04E+01 3.37E+01 D-48

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH ONS-N 287658002 10/4/2011 K-40 3.44E+03 1.97E+02 5.96E+01 FH ONS-N 287658002 10/4/2011 La-140 1.40E+00 6.75E+00 2.28E+01 U FH ONS-N 287658002 10/4/2011 Mn-54 4.65E-01 2.35E+00 7.90E+00 U FH ONS-N 287658002 10/4/2011 Nb-95 -3.16E+00 2.87E+00 8.61 E+00 U FH ONS-N 287658002 10/4/2011 Ru-103 -5.50E+00 3.19E+00 8.35E+00 U FH ONS-N 287658002 10/4/2011 Ru-106 2.76E+01 2.28E+01 7.52E+01 U FH ONS-N 287658002 10/4/2011 Sb-124 -3.72E+00 5.82E+00 1.75E+01 U FH ONS-N 287658002 10/4/2011 Sb-125 2.71E+00 6.34E+00 2.11E+01 U FH ONS-N 287658002 10/4/2011 Se-75 1.49E-01 3.14E+00 1.06E+01 U FH ONS-N 287658002 10/4/2011 Th-228 -2.67E+00 4.39E+00 1.39E+01 U FH ONS-N 287658002 10/4/2011 Zn-65 -6.71E+00 7.08E+00 2.11E+01 U FH ONS-N 287658002 10/4/2011 Zr-95 4.95E-01 4.77E+00 1.60E+01 U FH ONS-S 287658003 10/4/2011 Ac-228 1.88E+01 1.03E+01 3.39E+01 U FH ONS-S 287658003 10/4/2011 Ag-108m 1.40E+00 2.14E+00 7.07E+00 U FH ONS-S 287658003 10/4/2011 Ag-Il0m -1.56E+00 2.62E+00 7.07E+00 U FH ONS-S 287658003 10/4/2011 Ba-140 1.13E+01 6.35E+00 2.30E+01 U FH ONS-S 287658003 10/4/2011 Be-7 -3.59E+01 2.53E+01 7.08E+01 U FH ONS-S 287658003 10/4/2011 Ce-141 9.83E-01 4.67E+00 1.53E+01 U FH ONS-S 287658003 10/4/2011 Ce- 144 -1.55E+01 1.43E+01 4.49E+01 U FH ONS-S 287658003 10/4/2011 Co-57 -7.08E-02 1.85E+00 6.24E+00 U FH ONS-S 287658003 10/4/2011 Co -1.88E-01 2.77E+00 9.12E+00 U FH ONS-S 287658003 10/4/2011 Co-60 -5.33E-01 2.68E+00 8.80E+00 U FH ONS-S 287658003 10/4/20 11 Cr-51 4.72E+01 3.OOE+01 9.75E+01 U FH ONS-S 287658003 10/4/2011 Cs-134 5.70E+00 3.3 1E+00 1.1OE+01 U FH ONS-S 287658003 10/4/2011 Cs-137 2.64E+01 4.25E+00 6.50E+00 M FH ONS-S 287658003 10/4/2011 Fe-59 -9.69E+00 7.20E+00 2.OOE+01 U FH ONS-S 287658003 10/4/2011 1-131 8.72E+00 1.03E+01 3.43E+01 U FH ONS-S 287658003 10/4/2011 K-40 2.63E+03 1.59E+02 7.21E+01 FH 10/4/2011 .6.34E+00 ONS-S 287658003 La-140 1.13E+01 2.30E+01 U FH ONS-S 287658003 10/4/2011 Mn-54 1.89E-02 2.28E+00 7.50E+00 U FH ONS-S 287658003 10/4/2011 Nb-95 1.07E+00 2.53E+00 8.56E+00 U FH ONS-S 287658003 10/4/2011 Ru-103 -4.64E+00 3.09E+00 8.45E+00 U FH ONS-S 287658003 10/4/2011 Ru-106 3.55E+01 2.22E+01 7.47E+01 U FH ONS-S 287658003 10/4/2011 Sb-124 3.93E+00 5.46E+00 1.92E+01 U FH ONS-S 287658003 10/4/2011 Sb-125 9.65E+00 6.94E+00 2.27E+01 U FH ONS-S 287658003 10/4/2011 Se-75 -1.40E+00 3.20E+00 1.03E+01 U FH ONS-S 287658003 10/4/2011 Th-228 -7.41 E+00 5.14E+00 1.51E+01 U FH ONS-S 287658003 10/4/2011 Zn-65 -4.68E+00 7.05E+00 2.13E+01 U FH ONS-S 287658003 10/4/2011 Zr-95 -4.02E-01 4.20E+00 1.38E+01 U FH OFS-S 287658004 10/4/2011 Ac-228 3.73E+00 1.21E+01 4.19E+01 U FH OFS-S 287658004 10/4/2011 Ag-108m 5.52E-01 2.25E+00 7.56E+00 U FH OFS-S 287658004 10/4/2011 Ag-I Om -8.32E+00 3.45E+00 7.73E+00 U FH OFS-S 287658004 10/4/2011 Ba- 140 5.54E+00 4.50E+00 1.70E+01 U FH OFS-S 287658004 10/4/2011 Be-7 -4.7 1E+00 2.68E+01 8.82E+01 U FH OFS-S 287658004 10/4/2011 Ce-I141 -7.39E+00 6.19E+00 1.81E+01 U FH OFS-S 287658004 10/4/2011 Ce-144 -3.7 1E+00 1.66E+01 5.44E+01 U FH OFS-S 287658004 10/4/2011 Co-57 2.24E+00 2.22E+00 7.35E+00 U FH OFS-S 287658004 10/4/2011 Co-58 -5.96E+00 3.38E+00 8.57E+00 U FH OFS-S 287658004 410/4/2011 Co-60 -5.11E+00 3.74E+00 1.07E+01 U FH OFS-S 287658004 10/4/2011 Cr-51 4.5 1E+00 3.17E+01 1.07E+02 U FH OFS-S 287658004 10/4/2011 Cs-134 -6.30E+00 3.74E+00 9.73E+00 U D-49

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH OFS-S 287658004 10/4/2011 Cs-137 7.03E+00 3.42E+00 1.1OE+01 U FH OFS-S 287658004 10/4/2011 Fe-59 -3.25E+00 8.27E+00 2.67E+01 U FH OFS-S 287658004 10/4/2011 1-131 -7.40E-01 1.1OE+01 3.67E+01 U FH OFS-S 287658004 10/4/2011 K-40 3.53E+03 2.26E+02 8.18E+01 FH OFS-S 287658004 10/4/2011 La-140 5.54E+00 4.49E+00 1.70E+01 U FH OFS-S 287658004 10/4/2011 Mn-54 -3.46E+00 2.93E+00 8.33E+00 U FH OFS-S 287658004 10/4/2011 Nb-95 2.04E+00 3.15E+00 1.05E+01 U FH OFS-S 287658004 10/4/2011 Ru-103 -4.84E+00 3.35E+00 9.58E+00 U FH OFS-S 287658004 10/4/2011 Ru-106 -2.86E+00 2.27E+01 7.36E+01 U FH OFS-S 287658004 10/4/2011 Sb-124 7.72E+00 7.25E+00 2.53E+01 U FH OFS-S 287658004 10/4/2011 Sb-125 -6.15E+00 6.71E+00 2.09E+0 I U FH OFS-S 287658004 10/4/2011 Se-75 9.82E-01 3.87E+00 1.21E+01 U FH OFS-S 287658004 10/4/2011 Th-228 -7.56E+00 5.72E--00 1.71E+01 U FH OFS-S 287658004 10/4/2011 Zn-65 -8.46E+00 8.08E+00 2.45E+01 U FH OFS-S 287658004 10/4/2011 Zr-95 2.23E+00 5.91E+00 1.95E+01 U D-50

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE SL-2 277756001 5/9/2011 Ac-228 2.99E+02 1.18E+02 2.48E+02 UI SE SL-2 277756001 5/9/2011 Ag-108m -5.29E+00 1.16E+01 4.01E+01 U SE SL-2 277756001 5/9/2011 Ag-Il0m 2.58E+01 1.60E+01 5.39E+01 U SE SL-2 277756001 5/9/2011 Ba- 140 -3.96E+01 6.09E+01 1.86E+02 U SE SL-2 277756001 5/9/2011 Be-7 4.50E+02 1.77E+02 5.55E+02 U SE SL-2 277756001 5/9/2011 Ce- 141 -8.41 E+00 2.55E+01 9.38E+01 U SE SL-2 277756001 5/9/2011 Ce- 144 1.04E+02 6.66E+01 2.39E+02 U SE SL-2 277756001 5/9/2011 Co-57 2.86E+00 7.99E+00 2.83E+01 U SE SL-2 277756001 5/9/2011 Co-58 -1. 17E+01 1.80E+01 5.94E+01 U SE SL-2 277756001 5/9/2011 Co-60 7.76E+00 1.45E+01 5.04E+01 U SE SL-2 277756001 5/9/2011 Cr-51 -1.63E+02 2.OOE+02 6.60E+02 U SE SL-2 277756001 5/9/2011 Cs-134 1.35E+01 2.05E+01 6.94E+01 U SE SL-2 277756001 5/9/2011 Cs-137 -9.51E+00 1.59E+01 5.16E+01 U SE SL-2 277756001 5/9/2011 Fe-59 7.61E+01 4.67E+01 1.57E+02 U SE SL-2 277756001 5/9/2011 1-131 -8.58E+01 1.35E+02 4.71E+02 U SE SL-2 277756001 5/9/2011 K-40 7.5 1E+03 5.18E+02 2.75E+02 SE SL-2 277756001 5/9/2011 La-140 -3.96E+01 6.09E+01 1.86E+02 U SE SL-2 277756001 5/9/2011 Mn-54 -1.70E+01 1.67E+01 5.33E+01 U SE SL-2 277756001 5/9/2011 Nb-95 -2.90E+01 2.13E+01 6.1OE+01 U SE SL-2 277756001 5/9/2011 Ru-103 -7.68E+00 1.88E+01 6.42E+01 U SE SL-2 277756001 5/9/2011 Ru-106 6.75E+01 1.31E+02 4.51E+02 U SE SL-2 277756001 5/9/2011 Sb-124 -3.01E+01 4.33E+01 1.31E+02 U SE SL-2 277756001 5/9/2011 Sb-125 1.59E+01 3.46E+01 1.24E+02 U SE SL-2 277756001 5/9/2011 Se-75 1.46E+01 i.75E+01 6.19E+01 U SE SL-2 277756001 5/9/2011 Th-228 7.99E+01 4.93E+01 1.00E+02 U

.SE SL-2 277756001 5/9/2011 Zn-65 -8.44E+01 4.48E+01 1.19E+02 U SE SL-2 277756001 5/9/2011 Zr-95 8.97E+01 4.12E+01 1.35E+02 U SE SL-3 277756002 5/9/2011 Ac-228 2.28E+02 5.17E+01 8.29E+01 SE SL-3 277756002 5/9/2011 Ag-108m -1.03E+01 6.53E+00 1.99E+01 U SE SL-3 277756002 5/9/2011 Ag- l10m -1.07E+01 7.64E+00 2.35E+01 U SE SL-3 277756002 5/9/2011 Ba-140 -3.57E+01 3.35E+01 9.64E+01 U SE SL-3 277756002 5/9/2011 Be-7 -4.01E+01 8.27E+01 2.81E+02 U SE SL-3 277756002 5/9/2011 Ce-141 -2.91E+01 2.01E+01 6.10E+01 U SE SL-3 277756002 5/9/2011 Ce- 144 3.31E+0I 4.23E+01 1.51E+02 U SE SL-3 277756002 5/9/2011 Co-57 -6.89E-01 5.12E+00 1.83E+01 U SE SL-3 277756002 5/9/2011 Co-58 -1.66E+01 1.19E+01 2.91E+01 U SE SL-3 277756002 5/9/2011 Co-60 1.59E+01 9.83E+00 3.32E+01 U SE SL-3 277756002 5/9/2011 Cr-51 -1.88E+02 1.15E+02 3.41E+02 U SE SLU-3 277756002 5/9/2011 Cs-134 4.20E+00 1.03E+01 3.43E+01 U SE SL-3 277756002 5/9/2011 Cs-137 -9.53E-01 7.81E+00 2.7.1 E+01 U SE SL-3 "277756002 5/9/2011 Fe-59 -4.76E+01 2.40E+01 6.20E+01 U SE SL-3 277756002 5/9/2011 1-131 1.04E+02 7.76E+01 2.78E+02 U SE SL-3 277756002 5/9/2011 K-40 7.65E+03 5.01E+02 2.63E+02 SE SL-3 277756002 5/9/2011 La-140 -3.57E+01 3.35E+01 9.64E+01 U SE SL-3 277756002 5/9/2011 Mn-54 -8.48E+00 8.29E+00 2.58E+01 U SE SL-3 277756002 5/9/2011 Nb-95 1.05E+01 1.08E+01 3.74E+01 U SE SL-3 277756002 5/9/2011 Ru- 103 -1.64E+01 1.08E+01 3.22E+01 U SE SL-3 277756002 5/9/2011 Ru-106 -3.55E+01 6.89E+01 2.36E+02 U SE SL-3 277756002 5/9/2011 Sb-124 -4.83E+00 1.77E+01 5.68E+01 U SE SL-3 277756002 5/9/2011 Sb-125 -1.27E+01 1.95E+01 6.61E+01 U SE SL-3 277756002 5/9/2011 Se-75 2.48E+00 9.65E+00 3.44E+01 U D-51

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE SL-3 277756002 5/9/2011 Th-228 1.48E+02 '2.39E+01 3.96E+01 SE SL-3 277756002 5/9/2011 Zn-65 2.55E+01 1.89E+01 5.85E+01 U SE SL-3 277756002 5/9/2011 Zr-95 1.53E+01 1.72E+01 6.02E+01 U SE SL-2 289852001 11/8/2011 Ac-228 1.18E+02 7.65E+01 1.90E+02 U SE SL-2 289852001 11/8/2011 Ag-108m 4.1IE+00 1.19E+01 4.25E+01 U SE SL-2 289852001 11/8/2011 Ag-110m -3.43E+01 1.69E+01 4.48E+01 U SE SL-2 289852001 11/8/2011 Ba- 140 8.71E+01 5.61E+01 1.97E+02 U SE SL-2 289852001 11/8/2011 Be-7 1.19E+03 3.99E+02 5.14E+02 SE SL-2 289852001 11/8/2011 Ce- 141 3.70E+01 2.53E+01 9.17E+01 U SE SL-2 289852001 11/8/2011 Ce- 144 6.42E+00 6.17E+01 2.33E+02 U SE SL-2 289852001 11/8/2011 Co-57 -1.04E+00 7.85E+00 2.76E+01 U SE SL-2 289852001 11/8/2011 Co-58 6.60E+00 1.79E+01 6.25E+01 U SE SL-2 289852001 11/8/2011 Co-60 -1.33E+01 1.69E+01 5.35E+01 U SE SL-2 289852001 11/8/2011 Cr-51 4.14E+02 1.95E+02 6.32E+02 U SE SL-2 289852001 11/8/2011 Cs-134 1.40E+01 1.75E+01 6.19E+01 U SE SL-2 289852001 11/8/2011 Cs-137 4.64E+01 2.01E+01 6.31E+01 U SE SL-2 289852001 11/8/2011 Fe-59 2.37E+01 3.93E+01 1.34E+02 U SE SL-2 289852001 11/8/2011 1-131 -6.45E+01 9.98E+01 3.49E+02 U SE SL-2 289852001 11/8/2011 K-40 7.59E+03 5.35E+02 4.49E+02 SE SL-2 289852001 11/8/2011 La-140 8.71E+01 5.60E+01 1.97E+02 U SE SL-2 289852001 11/8/2011 Mn-54 -1.36E+01 1.53E+01 4.94E+01 U SE SL-2 289852001 11/8/2011 Nb-95 -1.01E+01 1.84E+01 6.19E+01 U SE SL-2 289852001 11/8/2011 Ru-103 -3.88E+00 1.95E+01 6.75E+01 U SE SL-2 289852001 11/8/2011 Ru-106 -1.73E+02 1.39E+02 4.25E+02 U SE SL-2 289852001 11/8/2011 Sb-124 5.14E+01 4.31E+0I 1.49E+02 U SE SL-2 289852001 11/8/2011 Sb-125 1.19E+01 3.51E+01 1.26E+02 U SE SL-2 289852001 11/8/2011 Se-75 2.89E+00 1.70E+01 6.05E+01 U SE SL-2 289852001 11/8/2011 Th-228 2.14E+02 6.24E+01 1.01E+02 U' SE SL-2 289852001 11/8/2011 Zn-65 -1.05E+02 4.69E+01 1. 15E+02 U SE SL-2 289852001 11/8/2011 Zr-95 -3.67E+01 3.17E+01 1.00E+02 U SE SL-3 289852002 11/8/2011 Ac-228 1.67E+02 7.06E+01 1.70E+02 U SE SL-3 289852002 11/8/2011 Ag-108m -4.OOE-01 6.97E+00 2.44E+01 U SE SL-3 289852002 11/8/2011 Ag-I 10m -1.23E+01 9.23E+00 2.81E+01 U SE SL-3 289852002 11/8/2011 Ba- 140 -8.56E+0 I 4.06E+01 6.55E+01 U SE SL-3 289852002 11/8/2011 Be-7 5.99E+01 9.48E+01 3.37E+02 U SE SL-3 289852002 11/8/2011 Ce- 141 -8.87E+00 1.50E+01 5.34E+01 U SE SL-3 289852002 11/8/2011 Ce- 144 -2.06E+01 4.IIE+01 1.48E+02 U SE SL-3 289852002 11/8/2011 Co-57 8.5 1E-01 5.21E+00 1.96E+01 U SE SL-3 289852002 11/8/2011 Co-58 4.53E-01 9.29E+00 3.20E+01 U SE SL-3 289852002 11/8/2011 Co-60 2.08E+00 1.13E+01 3.84E+01 U SE SL-3 289852002 11/8/2011 Cr-51 -1.41E+02 1.15E+02 3.74E+02 U SE SL-3 289852002 11/8/2011 Cs-134 1.15E+01 1.21E+01 4.32E+01 U SE SL-3 289852002 11/8/2011 Cs-137 1.32E+01 1.02E+01 3.67E+01 U SE SL-3 289852002 11/8/2011 Fe-59 -3.59E+01 2.75E+01 8.03E+01 U SE SL-3 289852002 11/8/2011 1-131 -7.22E+01 6.42E+01 2.08E+02 U SE SL-3 289852002 11/8/2011 K-40 7.52E+03 4.96E+02 2.09E+02 SE SL-3 289852002 11/8/2011 La-140 -8.56E+01 4.04E+01 6.55E+01 U SE SL-3 289852002 11/8/2011 Mn-54 2.57E+00 8.71 E+00 3.03E+01 U SE SL-3 289852002 11/8/2011 Nb-95 -3.56E+00 1.19E+01 3.82E+01 U SE SL-3 289852002 11/8/2011 Ru-103 -1.IIE+01 1.09E+01 3.37E+01 U SE SL-3 289852002 11/8/2011 Ru-106 -3.30E+01 8.05E+01 2.77E+02 U D-52

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCiýkg) (pCi/kg)

SE SL-3 289852002 11/8/2011 Sb-124 -4.35E+00 2.07E+01 6.75E+01 U SE SL-3 289852002 11/8/2011 Sb-125 1.69E+01 2.04E+01 7.37E+01 U SE SL-3 289852002 11/8/2011 Se-75 -1.67E+00 .1.09E+0,1' 3.74E+01 U SE SL-3 289852002 11/8/2011 Th-228 1.57E+02 2.62E+01 4.60E+01 SE SL-3 289852002 11/8/2011 Zn-65 -4.62E+01 2.68E+01 7.28E+01 U SE SL-3 289852002 11/8/2011 Zr-95 1.64E+01 1.82E+01 6.57E+01 U D-53

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)ý TF ONS-G 286494001 9/22/2011 Ac-228 1.04E+01 8.20E+00 2.34E+01 TF ONS-G 286494001 9/22/2011 Ag-108m -7.11E-02 1.15E+00 3.83E+00 TF ONS-G 286494001 9/22/2011 Ag-Il0m -3.73E+00 1.65E+00 4.14E+00 TF ONS-G 286494001 9/22/2011 Ba- 140 -6.41E-01 1.84E+00 5.95E+00 TF ONS-G 286494001 9/22/2011 Be-7 1.29E+02 1.96E+01 3.67E+01 TF ONS-G 286494001 9/22/2011 Ce-141 -6.97E-01 1.89E+00 6.22E+00 TF ONS-G 286494001 9/22/2011 Ce-144 -1.63E+01 8.24E+00 2.32E+01 TF ONS-G 286494001 9/22/2011 Co-57 5.07E-01 9.33E-01 3.14E+00 TF ONS-G 286494001 9/22/2011 Co-58 1.65E+00 1.44E+00 4.84E+00 TF ONS-G 286494001 9/22/2011 Co-60 2.42E+00 1.93E+00 6.26E+00 TF ONS-G 286494001 9/22/2011 Cr-51 -1.24E+00 1.12E+01 3.80E+01 TF ONS-G 286494001 9/22/2011 Cs-134 1.49E+00 1.73E+00 5.85E+00 TF ONS-G 286494001 9/22/2011 Cs-137 2.27E+00 1.68E+00 5.36E+00 TF ONS-G 286494001 9/22/2011 Fe-59 1.33E+00 3.8 1E+00 1.26E+01 TF ONS-G 286494001 9/22/2011 1-131 -1.63E+00 1.91E+00 6.17E+00 TF ONS-G 286494001 9/22/2011 K-40 4.86E+03 2.35E+02 4.44E+01 TF ONS-G 286494001 9/22/2011 La-140 -6.41E-01 1.84E+00 5.95E+00 TF ONS-G 286494001 9/22/2011 Mn-54 -7.74E-01 1.52E+00 4.98E+00 TF. ONS-G 286494001 9/22/2011 Nb-95 5.28E-01 1.43E+00 4.84E+00 TF ONS-G 286494001 9/22/2011 Ru- 103 8.08E-01 1.34E+00 4.46E+00 TF ONS-G 286494001 9/22/2011 Ru-I106 1.30E+01 1.32E+01 4.30E+01 TF ONS-G 286494001 9/22/2011 Sb-124 1.09E-01 2.46E+00 8.14E+00 TF ONS-G 286494001 9/22/2011 Sb-125 -3.63E+00 3.64E+00 1.15E+01 TF ONS-G 286494001 9/22/2011 Se-75 -6.30E-01 1.61E+00 5.1OE+00 TF ONS-G 286494001 9/22/2011 Th-228 3.99E+00 4.OOE+00 8.66E+00 TF ONS-G 286494001 9/22/2011 Zn-65 -9.54E+00 4.63E+00 1.23E+01 TF ONS-G 286494001 9/22/2011 Zr-95 1.02E+00 2.55E+00 8.67E+00 TF OFS-G 286494002 9/22/2011 Ac-228 2.87E+00 1.27E+01 3.67E+01 TF OFS-G 286494002 9/22/2011 Ag-108m -2.68E+00 1.72E+00 5.03E+00 TF OFS-G 286494002 9/22/2011 Ag-Il0m -4.94E+00 2.55E+00 6.70E+00 TF OFS-G 286494002 9/22/2011 Ba-140 5.87E-01 3.01E+00 1.00E+01 TF OFS-G 286494002 9/22/2011 Be-7 1.51E+02 3.53E+01 5.50E+01 TF OFS-G 286494002 9/22/2011 Ce-141 1.34E+00 2.22E+00 7.37E+00 TF OFS-G 286494002 9/22/2011 Ce-144 -1.61E+00 8.17E+00 2.70E+01 TF OFS-G 286494002 9/22/2011 Co-57 1.53E-01 1.06E+00 3.53E+00 TF OFS-G 286494002 9/22/2011 Co-58 6.18E-01 2.24E+00 7.54E+00 TF OFS-G 286494002 9/22/2011 Co-60 -3.93E-01 2.69E+00 8.93E+00 TF OFS-G 286494002 9/22/2011 Cr-51 1.57E+01 1.52E+01 5.11E+01 TF OFS-G 286494002 9/22/2011 Cs-134 -2.49E+00 3.41E+00 9.28E+00 TF OFS-G 286494002 9/22/2011 Cs-137 1.50E-01 2.50E+00 8.02E+00 TF OFS-G 286494002 9/22/2011 Fe-59 -2.54E+00 5.69E+00 1.81E+01 TF OFS-G 286494002 9/22/2011 1-131 2.48E+00 2.65E+00 8.89E+00 TF OFS-G 286494002 9/22/2011 K-40 4.37E+03 2.17E+02 6.79E+01 TF OFS-G 286494002 9/22/2011 La-140 5.87E-01 3.01E+00 1.00E+01 TF OFS-G 286494002 9/22/2011 Mn-54 -1.20E+00 2.28E+00 7.38E+00 TF OFS-G 286494002 9/22/2011 Nb-95 -1.00E-01 2.21E+00 7.38E+00 TF OFS-G 286494002 9/22/2011 Ru-103 -5.03E+00 3.74E+00 6.58E+00 TF OFS-G 286494002 9/22/2011 Ru-106 -3.1 E+01 2.12E+01 6.05E+01 TF OFS-G 286494002 9/22/2011 Sb-124 5.67E+00 4.81E+00 1.65E+01 TF OFS-G 286494002 9/22/2011 Sb-125 5.69E+00 5.08E+00 1.68E+01 TF OFS-G 286494002 9/22/2011 Se-75 3.94E-02 2.21E+00 7.05E+00 D-54

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF OFS-G 286494002 9/22/2011 Th-228 2.24E-01I 4.95E+00 1.16E+01 U TF OFS-G 286494002 9/22/2011 Zn-65 4.20E+00 6.38E+00 2.09E+01 U TF OFS-G 286494002 9/22/2011 Zr-95 -2.33E+00 3.91E+00 1.27E+01 U D-55

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 270004023 1/5/2011 Ac-228 6.68E+00 3.90E+00 1.35E+01 TM MR 270004023 1/5/2011 Ag-108m -7.99E-01 6.68E-01 2.13E+00 TM MR 270004023 1/5/2011 Ag-li0m -1.15E-01 9.21E-01 2.95E+00 TM MR 270004023 1/5/2011 Ba-140 2.03E+00 1.29E+00 4.65E+00 TM MR 270004023 1/5/2011 Be-7 5.81E+00 7.36E+00 2.46E+01 TM MR 270004023 1/5/2011 Ce- 141 9.39E-01 1.16E+00 3.85E+00 TM MR 270004023 1/5/2011 Ce- 144 6.05E-01 4.17E+00 1.38E+01 TM MR 270004023 1/5/2011 Co-57 4.53E-01 5.35E-01 1.80E+00 TM MR 270004023 1/5/2011 Co-58 -6.72E-01 9.05E-01 2.95E+00 TM MR 270004023 1/5/2011 Co-60 1.59E+00 1.07E+00 3.78E+00 TM MR 270004023 1/5/2011 Cr-51 7.02E+00 7.02E+00 2.41E+01 TM MR 270004023 1/5/2011 Cs-134 -7.19E-01 1.08E+00 3.55E+00 TM MR 270004023 1/5/2011 Cs-137 7.82E-01 9.77E-01 3.21E+00 TM MR 270004023 1/5/2011 Fe-59 4.03E-01 2.26E+00 7.42E+00 TM MR 270004023 1/5/2011 1-131 -1.02E-01 1.67E-01 5.56E-01 TM MR 270004023 1/5/2011 1-131 -2.26E+00 1.42E+00 4.55E+00 TM MR 270004023 1/5/2011 K-40 1.65E+03 8.32E+01 2.78E+01 TM MR 270004023 1/5/2011 La-140 2.03E+00 1.29E+00 4.65E+00 TM MR 270004023 1/5/2011 Mn-54 -2.91E-01 9.02E-01 2.97E+00 TM MR 270004023 1/5/2011 Nb-95 -2.13E+00 8.97E-01 2.76E+00 TM MR 270004023 1/5/2011 Ru-103 -2.77E-01 8.76E-01 2.84E+00 TM MR 270004023 1/5/2011 Ru-106 1.87E+01 7.41E+00 2.57E+01 TM MR 270004023 1/5/2011 Sb-124 -6.20E-01 1.94E+00 5.29E+00 TM MR 270004023 1/5/2011 Sb-125 1.36E+00 2.05E+00 6.90E+00 TM MR 270004023 1/5/2011 Se-75 2.38E+00 9.96E-01 3.3 1E+00 TM MR 270004023 1/5/2011 Th-228 -9.46E-01 2.04E+00 5.19E+00 TM MR 270004023 1/5/2011 Zn-65 -3.53E+00 2.53E+00 7.85E+00 TM MR 270004023 1/5/2011 Zr-95 -1.58E+00 1.62E+00 5.26E+00 TM SF 270004024 1/5/2011 Ac-228 -1.34E+00 3.22E+00 8.21E+00 TM SF 270004024 1/5/2011 Ag-108m 3.17E-01 5.53E-01 1.80E+00 TM SF 270004024 1/5/2011 Ag-Il0m 2.01E-01 5.91E-01 1.97E+00 TM SF 270004024 1/5/2011 Ba- 140 1.60E-01 9.61E-01 3.15E+00 TM SF 270004024 1/5/2011 Be-7 -8.34E-01 5.07E+00 1.70E+01 TM SF 270004024 1/5/2011 Ce-I141 -6.43E-01 1.09E+00 3.68E+00 TM SF 270004024 1/5/2011 Ce- 144 -4.19E-02 4.18E+00 1.32E+01 TM SF 270004024 1/5/2011 Co-57 4.73E-01 5.58E-01 1.79E+00 TM SF 270004024 1/5/2011 Co-58 9.22E-02 6.49E-01 2.13E+00 TM SF 270004024 1/5/2011 Co-60 3.27E-01 6.76E-01 2.27E+00 TM SF 270004024 1/5/2011 Cr-51 5.46E+00 6.05E+00 2.01E+01 TM SF 270004024 1/5/2011 Cs-134 3.70E-01 7.29E-01 2.42E+00 TM SF 270004024 1/5/2011 Cs-137 -8.59E-01 6.50E-01 2.08E+00 TM SF 270004024 1/5/2011 Fe-59 6.15E-01 1.47E+00 4.99E+00 TM SF 270004024 1/5/2011 1-131 -1.44E+00 1.19E+60 3.75E+00 TM SF 270004024 1/5/2011 1-131 2.49E-02 2.19E-01 7.20E-01 TM SF 270004024 1/5/2011 K-40 1.44E+03 7.24E+01 1.67E+01 TM SF 270004024 1/5/2011 La-140 1.60E-01 9.61E-01 3.15E+00 TM SF 270004024 1/5/2011 Mn-54 2.50E-01 6.40E-01 2.11E+00 TM SF 270004024 1/5/2011 Nb-95 -4.85E-01 6.42E-01 2.06E+00 TM SF 270004024 1/5/2011 Ru-103 -2.35E+00 6.59E-01 1.98E+00 TM SF 270004024 1/5/2011. Ru-106 -9.99E+00 5.37E+00 1.69E+01 TM SF 270004024 1/5/2011 Sb-124 -2.02E-01 1.32E+00 4.24E+00 D-56

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 270004024 1/5/2011 Sb-125 8.97E-01 1.70E+00 5.54E+00 U TM SF 270004024 1/5/2011 Se-75 -9.53E-01 8.47E-01 2.74E+00 U TM SF 270004024 1/5/2011 Th-228 1.70E+00 2.04E+00 4.74E+00 U TM SF 270004024 1/5/2011 Zn-65 -1.12E+00 1.52E+00 4.98E+00 U TM SF 270004024 1/5/2011 Zr-95 -1.22E+00 1.13E+00 3.59E+00 U TM LF 270004025 1/5/2011 Ac-228 2.64E-02 3.87E+00 1.05E+01 U TM LF 270004025 1/5/2011 Ag-108m -1.16E-01 6.69E-01 2.18E+00 U TM LF 270004025 1/5/2011 Ag-ll0m 2.13E-01 6.92E-01 2.34E+00 U TM LF 270004025 1/5/2011 Ba- 140 6.63E-01 1.08E+00 3.65E+00 U TM LF 270004025 1/5/2011 Be-7 -1.61E+00 6.63E+00 2.15E+01 U TM LF 270004025 1/5/2011 Ce-141 1.30E-01 1.52E+00 4.75E+00 U TM LF 270004025 1/5/2011 Ce-I144 4.98E-01 5.52E+00 1.79E+01 U TM LF 270004025 1/5/2011 Co-57 1.33E+00 7.05E-01 2.33E+00 U TM LF 270004025 1/5/2011 Co-58 4.76E-01 7.53E-01 2.54E+00 U TM LF 270004025 1/5/2011 Co-60 -3.59E-01 7.27E-01 2.39E+00 U TM LF 270004025 1/5/2011 Cr-51 5.23E+00 7.25E+00 2.43E+01 U TM LF 270004025 1/5/2011 Cs-134 8.38E-01 8.88E-01 3.02E+00 U TM LF 270004025 1/5/2011 Cs-137 1.59E-01 7.67E-01 2.58E+00 U TM LF 270004025 1/5/2011 Fe-59 -2.94E+00 1.77E+00 5.46E+00 U TM LF 270004025 1/5/2011 1-131 -4.59E-01 1.38E+00 4.53E+00 U TM LF 270004025 1/5/2011 1-131 1.76E-01 2.29E-01 7.52E-01 U TM LF 270004025 1/5/2011 K-40 1.47E+03 7.24E+01 2.13E+01 TM LF 270004025 1/5/2011 La-140 6.63E-01 1.08E+00 3.65E+00 U TM LF 270004025 1/5/2011 Mn-54 4.27E-01 7.22E-01 2.43E+00 U TM LF 270004025 1/5/2011 Nb-95 1.20E+00 7.79E-01 2.68E+00 U TM LF 270004025 1/5/20 11 Ru-103 -4.57E-01 7.84E-01 2.51E+00 U TM LF 270004025 1/5/20 11 Ru-106 -5.01 E+00 6.48E+00 2.14E+01 U TM LF 270004025 1/5/2011 Sb-124 2.06E-01 1.55E+00 5.14E+00 U TM LF 270004025 1/5/2011 Sb-125 1.31E-02 2.OOE+00 6.57E+00 U TM LF 270004025 1/5/2011 Se-75 3.69E-01 1.01E+00 3.40E+00 U TM LF 270004025 1/5/2011 Th-228 -1.54E+00 1.93E+00 5.51E+00 U TM. LF 270004025 1/5/2011 Zn-65 -1.20E-01 2.03E+00 5.63E+00 U TM LF 270004025 1/5/2011 Zr-95 -2.51E+00 1.31E+00 4.13E+00 U TM 'MR 270795023 1/19/2011 Ac-228 4.02E+00 3.38E+00 1.17E+01 U TM MR 270795023 1/19/2011 Ag-108m -6.84E-01 7.27E-01 2.27E+00 U TM MR 270795023 1/19/2011 Ag-ll0m -6.69E-01 7.85E-01 2.52E+00 U TM MR 270795023 1/19/2011 Ba-140 7.16E-01 1.07E+00 3.70E+00 U TM MR 270795023 1/19/2011 Be-7 -6.88E+00 6.28E+00 2.05E+01 U TM MR 270795023 1/19/2011 Ce-141 3.31E-01 1.46E+00 4.65E+00 U TM MR 270795023 1/19/2011 Ce-144 -1.50E+00 5.52E+00 1.75E+01 U TM MR 270795023 1/19/2011 Co-57 6.12E-01 7.17E-01 2.33E+00 U TM MR 270795023 1/19/2011 Co-58 8.45E-01 8.30E-01 2.77E+00 U TM MR 270795023 1/19/2011 Co-60 4.53E-01 8.67E-01 2.89E+00 U TM MR 270795023 1/19/2011 Cr-51 -1.84E+00 7.21E+00 2.34E+01 U TM MR 270795023 1/19/2011 Cs-134 1.71E-01 9.85E-01 3.21E+00 U TM MR 270795023 1/19/2011 Cs-137 4.17E-01 8.66E-01 2.88E+00 U TM MR 270795023 1/19/2011 Fe-59 -4.91E-01 1.93E+00 6.32E+00 U TM MR 270795023 1/19/2011 1-131 6.92E-02 2.17E-01 7.17E-01 U TM MR 270795023 1/19/2011 1-131 -7.06E-01 1.35E+00 4.32E+00 U TM MR 270795023 1/19/2011 K-40 1.70E+03 9.OOE+01 2.66E+01 TM MR 270795023 1/19/2011 La-140 7.16E-01 1.07E+00 3.70E+00 U D-57

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 270795023 1/19/2011 Mn-54 2.OOE+00 8.68E-01 2.98E+00 U TM MR 270795023 1/19/2011 Nb-95 1.07E+00 7.97E-01 2.70E+00 U TM MR 270795023 1/19/2011 Ru-103 -1.46E+00 7.98E-01 2.54E+00 U TM MR 270795023 1/19/2011 Ru-106 5.77E+00 7.01E+00 2.37E+01 U TM MR 270795023 1/19/2011 Sb-124 3.53E-02 1.60E+00 5.31E+00 U TM MR 270795023 1/19/2011 Sb-125 2.14E+00 2.19E+00 7.18E+00 U TM MR 270795023 1/19/2011 Se-75 2.47E+00 1.07E+00 3.66E+00 U TM MR 270795023 1/19/2011 Th-228 -3.41E+00 2.63E+00 7.01E+00 U TM MR 270795023 1/19/2011 Zn-65 -5.01E-01 2.12E+00 6.97E+00 U TM MR 270795023 1/19/2011 Zr-95 3.52E-01 1.52E+00 4.97E+00 U TM SF 270795024 1/19/2011 Ac-228 -4.73E+00 4.41E+00 1.08E+01 U TM SF 270795024 1/19/2011 Ag-108m 1.22E+00 6.70E-01 2.24E+00 U TM SF 270795024 1/19/2011 Ag-II0m -1.42E-01 7.37E-01 2.42E+00 U TM SF 270795024 1/19/2011 Ba- 140 2.15E-01 9.71E-01 3.18E+00 U TM SF 270795024 1/19/2011 Be-7 -2.99E+00 6.19E+00 2.06E+01 U TM SF 270795024 1/19/2011 Ce-141 2.79E+00 1.34E+00 4.63E+00 U TM SF 270795024 1/19/2011 Ce-I144 4.24E+00 5.25E+00 1.68E+01 U TM SF 270795024 1/19/2011 Co-57 -4.09E-02 6.92E-01 2.20E+00 U TM SF 270795024 1/19/2011 Co-58 -9.20E-01 7.52E-01 2.35E+00 U TM SF 270795024 1/19/2011 Co-60 3.75E-01 7.91E-01 2.64E+00 U TM SF 270795024 1/19/2011 Cr-51 9.76E+00 7.04E+00 2.36E+01 U TM SF 270795024 1/19/2011 Cs-134 3.62E-02 9.25E-01 3.02E+00 U TM SF 270795024 1/19/2011 Cs-137 1.01E+00 8.27E-01 2.81E+00 U TM SF 270795024 1/19/2011 Fe-59 -6.04E-01 1.71E+00 5.64E+00 U TM SF 270795024 1/19/2011 1-131 5.97E-01 1.32E+00 4.33E+00 U TM SF 270795024 1/19/2011 1-131 -1.16E-01 2.39E-01 7.63E-01 U TM SF 270795024 1/19/2011 K-40 1.36E+03 7.OOE+01 2.28E+01 TM SF 270795024 1/19/2011 La-140 2.15E-01 9.71E-01 3.18E+00 U TM SF 270795024 1/19/2011 Mn-54 -1.25E+00 7.67E-01 2.36E+00 U TM SF 270795024 1/19/2011 Nb-95 8.11E-01 7.68E-01 2.59E+00 U TM SF 270795024 1/19/2011 Ru-103 -4.87E-01 7.26E-01 2.40E+00 U TM Su 270795024 1/19/2011 Ru-106 2.36E+00 6.64E+00 2.22E+01 U TM SF 270795024 1/19/2011 Sb-124 3.04E-01 1.43E+00 4.85E+00 U TM SF 270795024 1/19/2011 Sb-125 -2.52E+00 2.04E+00 6.32E+00 U TM SF 270795024 1/19/2011 Se-75 9.46E-01 1.04E+00 3.47E+00 U TM SF 270795024 1/19/2011 Th-228 2.1OE+00 2.48E+00 4.99E+00 U TM SF 270795024 1/19/2011 Zn-65 -3.19E+00 2.08E+00 5.53E+00 U TM SF 270795024 1/19/2011 Zr-95 -2.46E+00 1.34E+00 4.1OE+00 U TM LF 270795025 1/19/2011 Ac-228 3.96E+00 3.43E+00 9.72E+00 U TM LF 270795025 1/19/2011 Ag-108m 3.27E-01 5.26E-01 1.78E+00 U TM LF 270795025 1/19/2011 Ag-Il0m 6.23E-02 6.01E-01 1.95E+00 U TM LF 270795025 1/19/2011 Ba-140 -5.68E-01 9.27E-01 2.99E+00 U TM LF 270795025 1/19/2011 Be-7 1.86E+00 4.76E+00 1.60E+01 U TM LF 270795025 1/19/2011 Ce- 141 -6.83E-01 1.04E+00 3.44E+00 U TM LF 270795025. 1/19/2011 Ce-I144 -3.59E+00 4.03E+00 1.33E+01 U TM LF 270795025 1/19/2011 Co-57 -1.61E-01 5.09E-01 1.70E+00 U TM LF 270795025 1/19/2011 Co-58 -9.13E-02 6.53E-01 2.19E+00 U TM LF 270795025 1/19/2011 Co-60 1.56E-01 7.66E-01 2.50E+00 U TM LF 270795025 1/19/2011 Cr-51 -1.61E+00 5.85E+00 1.84E+01 U TM LF 270795025 1/19/2011 Cs-134 -8.84E-01 8.04E-01 2.62E+00 U TM LF 270795025 1/19/2011 Cs-137 2.83E-01 6.69E-01 2.20E+00 U D-58

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 270795025 1/19/2011 Fe-59 -1.96E+00 1.55E+00 4.89E+00 TM LF 270795025 1/19/2011 1-131 4.44E-01 1.00E+00 3.41E+00 TM LF 270795025 1/19/2011 1-131 -8.118E-02 1.72E-01 5.54E-01 TM LF 270795025 1/19/2011 K-40 1.4]E+03 7.28E+01 1.94E+01 TM LF 270795025 1/19/2011 La-140 -5.68E-01 9.27E-01 2.99E+00 TM LF 270795025 1/19/2011 Mn-54 3.90E-01 6*40E-01 2.19E+00 TM LF 270795025 1/19/2011 Nb-95 1.04E+00 6.69E-01 2.25E+00 TM LF 270795025 1/19/2011 Ru- 103 -8.97E-01 6.58E-01 2.09E+00 TM LF 270795025 1/19/2011 Ru-106 1.24E+00 5.37E+00 1.76E+01 TM LF 270795025 1/19/2011 Sb-124 7.77E-01 1.41E+00 4.80E+00 TM LF 270795025 1/19/2011 Sb-125 -1.35E+00 1.58E+00 5.17E+00 TM LF 270795025 1/19/2011 Se-75 -6.67E-01 8.28E-01 2.61E+00 TM LF 270795025 1/19/2011 Th-228 2.41E+00 2.15E+00 4.43E+00 TM LF 270795025 1/19/2011 Zn-65 -1.35E+00 1.64E+00 5.25E+00 TM LF 270795025 1/19/2011 Zr-95 -1. 16E+00 1.21E+00 3.76E+00 TM MR 271781023 2/3/2011 Ac-228 8.3 1E+00 5.58E+00 9.10E+00 TM MR 271781023 2/3/2011 Ag-108m 5.5 1E-01 5.36E-01 1.76E+00 TM MR 271781023 2/3/2011 Ag- I10m -6.38E-01 6.34E-01 1.92E+00 TM MR 271781023 2/3/2011 Ba-140 -1.39E-01 7.61E-01 2.52E+00 TM MR 271781023 2/3/2011 Be-7 1.15E+00 4.92E+00 1.62E+01 TM MR 271781023 2/3/2011 Ce- 141 9.79E-01 1.14E+00 3.49E+00 TM MR 271781023 2/3/2011 Ce- 144 3.05E+00 4.05E+00 1.31E+01 TM MR 271781023 2/3/2011 Co-57 5.65E-01 5.50E-01 1.77E+00 TM MR 271781023. 2/3/2011 Co-58 -9.57E-01 6.47E-01 1.94E+00 TM MR 271781023 2/3/2011 Co-60 -8.56E-01 7.15E-01 2. 1OE+00 TM MR 271781023 2/3/2011 Cr-51 4.38E+00 5.32E+00 1.78E+01

TM MR 271781023 2/3/2011 Cs-134 5.29E-01 7.27E-01 2.46E+00 TM MR 271781023 2/3/2011 Cs-137 4.43E-01 6.67E-01 2.16E+00 TM MR 271781023 2/3/2011 Fe-59 3.65E-02 1.47E+00 4.83E+00

TM MR 271781023 2/3/2011 1-131 -2.41E-02 1.76E-01 5.91E-01 TM MR 271781023 2/3/2011 1-131 2.20E+00 1.08E+00 3.33E+00 TM MR 271781023 2/3/2011 K-40 1.61E+03 7.94E+01 1.86E+01 TM MR 271781023 2/3/2011 La-140 -1.39E-01 7.61E-01 2.52E+00 TM MR 271781023 2/3/2011 Mn-54 3.20E-01 6.08E-01 2.05E+00 TM MR 271781023 2/3/2011 Nb-95 2.45E-01 6.23E-01 2.11E+00 TM MR 271781023 2/3/2011 Ru-103 -4.43E-01 6.45E-01 2.04E+00 TM MR 271781023 2/3/2011 Ru-106 4.32E+00 5.41E+00 1.76E+01 TM MR 271781023 2/3/2011 Sb-124 9.26E-01 1.34E+00 4.55E+00 TM MR 271781023 2/3/2011 Sb-125 1.62E+00 1.57E+00 5.18E+00 TM MR 271781023 2/3/2011 Se-75 5.5 1E-01 8.06E-01 2.72E+00 TM MR 271781023 2/3/2011 Th-228 -2.43E-02 1.53E+00 4.13E+00 TM MR 271781023 2/3/2011 Zn-65 -7.45E-01 1.61 E+00 5.19E+00 TM MR 271781023 2/3/2011 Zr-95 4.42E-01 1.1OE+00 3.72E+00 TM SF 271781024 2/3/2011 Ac-228 5.06E-01 4.60E+00 1.20E+01 TM SF 271781024 2/3/2011 Ag-108m -1.36E-01 7.13E-01 2.35E+00 TM SF 271781024 2/3/2011 Ag-Il0m 1.13E+00 8.71E-01 2.47E+00 TM SF 271781024 2/3/2011 Ba- 140 1.65E+00 1.1OE+00 3.74E+00 TM SF 271781024 2/3/2011 Be-7 -1.03E+00 6.70E+00 2.20E+01 TM SF 271781024 2/3/2011 Ce- 141 2.37E+00 1.56E+00 4.74E+00 TM SF 271781024 2/3/2011 Ce-144 -2.88E-01 5.63E+00 1.79E+01 TM SF 271781024 2/3/2011 Co-57 1.17E+00 7.63E-01 2.40E+00 D-59

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 271781024 2/3/2011 Co-58 1.55E-01 7.95E-01 2.68E+00 U TM SF 271781024 2/3/2011 Co-60 6.85E-01 9.02E-01 2.98E+00 U TM SF 271781024 2/3/2011 Cr-51 -8.97E-01 7.41E+00 2.48E+01 U TM SF 271781024 2/3/2011 Cs-134 -9.76E-0 I 9.82E-01 3.11E+00 U TM SF 271781024 2/3/2011 Cs-137 2.20E+00 1.54E+00 2.69E+00 U TM SF 271781024 2/3/2011 Fe-59 -2.39E-01 1.85E+00 6.08E+00 U TM SF 271781024 2/3/2011 1-131 2.56E-02 1.31E+00 4.38E+00 U TM SF 271781024 2/3/2011 1-131 4.66E-01 2.50E-01 7.62E-01 U TM SF 271781024 2/3/2011 K-40 1.35E+03 7.16E+01 2.55E+01 TM SF 271781024 2/3/2011 La-140 1.65E+00 1.10E+00 3.74E+00 U TM SF 271781024 2/3/2011 Mn-54 -1.89E+00 8.80E-01 2.35E+00 U TM SF 271781024 2/3/2011 Nb-95 6.34E-02 8.16E-01 2.63E+00 U TM SF 271781024 2/3/2011 Ru-103 -8.44E-01 9.93E-01 2.68E+00 U TM SF 271781024 2/3/2011 Ru-I106 1.52E+00 7.16E+00 2.34E+01 U TM SF 271781024 2/3/2011 Sb-124 -4.35E-01 1.73E+00 5.69E+00 U TM SF 271781024 2/3/2011 Sb-125 -3.68E+00 2.30E+00 6.76E+00 U TM SF 271781024 2/3/2011 Se-75 -1.11E+00 1.14E+00 3.48E+00 U TM SF 271781024 -2/3/2011 Th-228 1.28E+00 3.27E+00 5.41E+00 U TM SF 271781024 2/3/2011 Zn-65 4.27E-01 1.97E+00 6.5 1E+00 U TM SF 271781024 2/3/2011 Zr-95 -5.27E-01 1.45E+00 4.59E+00 U TM LF 271781025 2/3/2011 Ac-228 2.80E+00 3.09E+00 1.04E+01 U TM LF 271781025 2/3/2011 Ag-108m 3.96E-01 6.66E-01 2.22E+00 U TM LF 271781025 2/3/2011 Ag-Il0m -1.59E-01 6.90E-01 2.23E+00 U TM LF 271781025 2/3/2011 Ba- 140 1.02E+00 1.14E+00 3.78E+00 U TM LF 271781025 2/3/2011 Be-7 -8.87E+00 6.46E+00 1.95E+01 U TM LF 271781025 2/3/2011 Ce-141 5.OOE-01 1.30E+00 4.09E+00 U TM LF 271781025 2/3/2011 Ce- 144 2.5 1E+00 5.12E+00 1.54E+01 U TM LF 271781025 2/3/2011 Co-57 2.38E-02 6.29E-01 2.05E+00 U TM LF 271781025 2/3/2011 Co-58 4.09E-01 7.36E-01 2.40E+00 U TM LF 271781025 2/3/2011 Co-60 -2.80E-02 8.17E-01 2.69E+00 U TM LF 271781025 2/3/2011 Cr-51 -5.24E+00 6.77E+00 2.20E+01 U TM LF 271781025 2/3/2011 Cs-134 6.07E-01 8.91E-01 2.91E+00 U TM LF 271781025 2/3/2011 Cs-137 1.20E+00 8.03E-01 2.56E+00 U TM LF 271781025 2/3/2011 Fe-59 1.39Et00 1.76E+00 5.90E+00 U TM LF 271781025 2/3/2011 1-131 1.39E+00 1.21E+00 3.98E+00 U TM LF 271781025 2/3/2011 1-131 -8.01E-02 1.60E-01 5.3 1E-01 U TM LF 271781025 2/3/2011 K-40 1.40E+03 7.04E+01 2.19E+01 TM LF 271781025 2/3/2011 La-140 1.02E+00 1.14E+00 3.78E+00 U TM LF 271781025 2/3/2011 Mn-54 -6.22E-01 7.46E-01 2.29E+00 U TM LF 271781025 2/3/2011 Nb-95 1.05E+00 7.95E-01 2.55E+00 U TM LF 271781025 2/3/2011 Ru-103 -5.04E-01 7.66E-01 2.45E+00 U TM LF 271781025 2/3/2011 Ru-106 -1.97E+01 8.01E+00 1.96E+01 U TM LF 271781025 2/3/2011 Sb-124 -1.15E+00 1.52E+00 4.64E+00 U TM LF 271781025 2/3/2011 Sb-125 .2.21E-01 1.94E+00 6.46E+00 U TM LF 271781025 2/3/2011 Se-75 -5.28E-01 9.19E-01 3.04E+00 U TM LF 271781025 2/3/2011 Th-228 3.04E+00 2.62E+00 4.76E+00 U TM LF 271781025 2/3/2011 Zn-65 -2.54E+00 1.92E+00 5.81E+00 U TM LF 271781025 2/3/2011 Zr-95 -7.63E-01 1.34E+00 4.22E+00 U TM SF 272564024 2/16/2011 Ac-228 -4.43E+00 4.5 1E+00 1.15E+01 U TM SF 272564024 2/16/2011 Ag-108m -3.37E-01 6.52E-01 2.08E+00 U TM SF 272564024 2/16/2011 Ag-li0m -1.04E+00 7.65E-01 2.32E+00 U D-60

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM 272564024 2/16/2011 Ba- 140 -3.46E-01 1.09E+00 3.57E+00 U TM 272564024 2/16/2011 Be-7 -8.62E-01 6.61E+00 2.12E+01 U TM 272564024 2/16/2011 Ce- 141 1.46E+00 1.43E+00 4.14E+00 U TM 272564024 2/16/2011 Ce-144 -1.36E+00 4.82E+00 1.58E+01 U TM 272564024 2/16/2011 Co-57 -5.99E-01 6.22E-01 1.98E+00 U TM 272564024 2/16/2011 Co-58 -1.65E+00 8.87E-01 2.43E+00 U TM 272564024 2/16/2011 Co-60 -2.46E-01 8.82E-01 2.84E+00 U TM 272564024 2/16/2011 Cr-51 1.83E+00 7.OOE+00 2.34E+01 U TM 272564024 2/16/2011 Cs-134 1.44E+00 1.01E+00 .3.26E+00 U TM 272564024 2/16/2011 Cs-137 9.10E-02 7.82E-01 2.61E+00 U TM 272564024 2/16/2011 Fe-59 3.46E+00 2.13E+00 6.85E+00 U TM 272564024 2/16/2011 1-131 5.83E-03 1.68E-01 5.47E-01 U TM 272564024 2/16/2011 1-131 -5.86E-01 1.27E+00 4.14E+00 U TM 272564024 2/16/2011 K-40 1.33E+03 7.17E+01 2.22E+01 TM 272564024 2/16/2011 La-140 -3.46E-01 1.09E+00 3.57E+00 U TM 272564024 2/16/2011 Mn-54 -6.42E-01 7.91E-01 2.47E+00 U TM 272564024 2/16/2011 Nb-95 1.54E+00 8.97E-01 2.83E+00 U TM 272564024 2/16/2011 Ru-103 -1.93E+00 9.37E-01 2.46E+00 U TM 272564024 2/16/2011 Ru-106 4.97E-01 6.69E+00 2.24E+01 U TM 272564024 2/16/2011 Sb-124 -1.22E+00 1.72E+00 5.42E+00 U TM 272564024 2/16/2011 Sb-125 9.89E-01 2.07E+00 6.77E+00 U TM 272564024 2/16/2011 Se-75 -6.01E-01 9.49E-01 3.14E+00 U TM 272564024 2/16/2011 Th-228 8.72E-01 2.09E+00 4.75E+00 U TM 272564024 2/16/2011 Zn-65 -9.70E-01 2.OOE+00 6.51E+00 U TM 272564024 2/16/2011 Zr-95 -2.20E+00 1.47E+00 4.31E+00 U TM 272564025 2/16/2011 Ac-228 -4.56E+00 3.87E+00 1.09E+01 U TM 272564025 2/16/2011 Ag-108m 2.3 1E-01 7.26E-01 2.42E+00 U TM 272564025 2/16/2011 Ag-il0m -3.46E+00 1.17E+00 2.44E+00 U TM 272564025 2/16/2011 Ba- 140 1.85E+00 1.31E+00 4.41E+00 U TM 272564025 .2/16/2011 Be-7 -3.32E+00 6.66E+00 2.15E+01 U TM 272564025 2/16/2011 Ce- 141 6.12E+00 2.08E+00 4.89E+00 U1 TM 272564025 2/16/2011 Ce- 144 -1.56E+00 5.38E+00 1.76E+01 U TM 272564025 2/16/2011 Co-57 -3.46E-01 7.06E-01 2.29E+00 U TM 272564025 2/16/2011 Co-58 3.97E-01 7.85E-01 2.61E+00 U TM 272564025 2/16/2011 Co-60 9.97E-01 9.36E-01 3.08E+00 U TM 272564025 2/16/2011 Cr-51 -1.09E+01 7.60E+00 2.33E+01 U TM 272564025 2/16/2011 Cs-134 1.15E+00 1.03E+00 3.38E+00 U TM 272564025 2/16/2011 ,Cs-137 -9.10E-01 1.42E+00 3.33E+00 U TM 272564025 2/16/2011 Fe-59 7.27E-01 2.02E+00 6.72E+00 U TM 272564025 2/16/2011 1-131 -6.05E-01 1.38E+00 4.54E+00 U TM 272564025 2/16/2011 1-131 -1.30E-01 1.96E-01 6.21E-01 U TM 272564025 2/16/2011 K-40 1.49E4-03 7.87E+01 2.38E+01 TM 272564025 2/16/2011 La-140 1.85E+00 1.31E+00 4.41E+00 U TM 272564025 2/16/2011 Mn-54 -7.32E-01 7.99E-01 2.54E+00 U TM 272564025 2/16/2011 Nb-95 -9.01E-01 8.38E-01 2.51E+00 U TM 272564025 2/16/2011 Ru-103 3.76E-01 8.30E-01 2.75E+00 U TM 272564025 2/16/2011 Ru-106 4.19E+00 7.29E+00 2.39E+01 U TM 272564025 2/16/2011 Sb-124 3.13E+00 1.86E+00 6.24E+00 U TM 272564025 2/16/2011 Sb-125 -3.75E-01 2.1OE+00 6.94E+00 U TM 272564025 2/16/2011 Se-75 1.21E+00 1.17E+00 3.71E+00 U TM 272564025 2/16/2011 Th-228 -4.15E-01 1.92E+00 5.24E+00 U D-61

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 272564025 2/16/2011 Zn-65 -1.58E+00 1.96E+00 6.16E+00 U TM LF 272564025 2/16/2011 Zr-95 -5.53E-02 1.46E+00 4.71E+00 U TM MR 273401023 3/2/2011 Ac-228 -2.81E+00 4.87E+00 1.09E+01 U TM MR 273401023 3/2/2011 Ag-108m -4.48E-01 6.45E-01 2.04E+00 U TM MR 273401023 3/2/2011 Ag-Il0m -2.31E-01 7.30E-01 2.40E+00 U TM MR 273401023 3/2/2011 Ba-140 -3.60E-01 9.76E-01 3.19E+00 U TM MR 273401023 3/2/2011 Be-7 -1.95E+00 5.91E+00 1.89E+01 U TM MR 273401023 3/2/2011 Ce-141 -1.87E-01 1.28E+00 3.73E+00 U TM MR 273401023 3/2/2011 Ce-144 -3.99E+00 4.43E+00 1.41E+01 U TM MR 273401023 3/2/2011 Co-57 -8.31E-01 6.08E-01 1.87E+00 U TM MR 273401023 3/2/2011 Co-58 8.73E-01 8.02E-01 2.60E+00 U TM MR 273401023 3/2/2011 Co-60 -9.91E-01 9.33E-01 2.85E+00 U TM MR 273401023 3/2/2011 Cr-51 1.92E+00 6.11E+00 2.04E+01 U TM MR 273401023 3/2/2011 Cs-134 6.63E-01 8.91E-01 2.93E+00 U TM MR 273401023 3/2/2011 Cs-137 2.40E+00 9.68E-01 2.79E+00 U TM MR 273401023 3/2/2011 Fe-59 9.16E-01 1.77E+00 5.92E+00 U TM MR 273401023 3/2/2011 1-131 1.43E-02 1.60E-01 5.23E-01 U TM MR 273401023 3/2/2011 1-131 1.19E+00 1.14E+00 3.71E+00 U TM MR 273401023 3/2/2011 K-40 1.66E+03 8.70E+01 2.44E+01 TM MR 273401023 3/2/2011 La-140 -3.60E-01 9.76E-01 3.19E+00 U TM MR 273401023 3/2/2011 Mn-54 2.05E+00 8.62E-01 2.51E+00 U TM MR 273401023 3/2/2011 Nb-95 -1.96E-01 7.61E-01 2.48E+00 U TM MR 273401023 3/2/2011 Ru-103 8.95E-01 7.56E-01 2.40E+00 U TM MR 273401023 3/2/2011 Ru-106 4.88E+00 6.19E+00 2.07E+01 U TM MR 273401023 3/2/2011 Sb-124 5.19E-01 1.48E+00 4.97E+00 U TM MR 273401023 '3/2/2011 Sb-125 -2.70E+00 2.01E+00 6.04E+00 U TM MR 273401023 3/2/2011 Se-75 1.96E-01 8.91E-01 3.01E+00 U TM MR 273401023 3/2/2011 Th-228 -3.41E-01 1.69E+00 4.55E+00 U TM MR 273401023 3/2/2011 Zn-65 -3.50E+00 2.13E+00 6.24E+00 U TM MR 273401023 3/2/2011 Zr-95 2.32E-01 1.30E+00 4.30E+00 U TM SF 273401024 3/2/2011 Ac-228 2.09E-01 4.36E+00 1.09E+01 U TM SF 273401024 3/2/2011 Ag-108m -5.30E-03 6.14E-01 1.96E+00 U TM SF 273401024 3/2/2011 Ag-i l0m -3.60E-01 6.80E-01 2.19E+00 U TM SF 273401024 3/2/2011 Ba-140. 6&86E-02 1.02E+00 3.40E+00 U TM SF 273401024 3/2/2011 Be-7 -9.53E+00 6.12E+00 1.84E+01 U TM SF 273401024 3/2/2011 Ce-141 -2.56E-01 1.66E+00 4.04E+00 U TM SF 273401024 3/2/2011 Ce-144 2.22E+00 4.84E+00 1.54E+01 U TM SF 273401024 3/2/2011 Co-57 -1.13E+00 6.89E-01 1.98E+00 U TM SF 273401024 3/2/2011 Co-58 3.72E-01 7.37E-01 2.40E+00 U TM SF 273401024 3/2/2011 Co-60 5.49E-02 8.80E-01 2.87E+00 U TM SF 273401024 3/2/2011 Cr-51 9.85E+00 6.86E+00 2.17E+61 U TM SF 273401024 3/2/2011 Cs-134 1.I1E+00 9.51E-01 3.07E+00 U TM SF 273401024 3/2/2011 Cs-137 2.10E-01 7.35E-01 2.43E+00 U TM SF 273401024 3/2/2011 Fe-59 1.03E+00 1.73E+00 5.75E+00 U TM SF 273401024 3/2/2011 1-131 7.32E-02 1.55E-01 5.26E-01 U TM SF 273401024 3/2/2011 1-131 -9.62E-01 1.11E+00 3.44E+00 U TM SF 273401024 3/2/2011 K-40 1.54E+03 8.16E+01 2.03E+01 TM SF 273401024 3/2/2011 La-140 6.86E-02 1.02E+00 3.40E+00 U TM SF 273401024 3/2/2011 Mn-54 1.19E+00 7.87E-01 2.49E+00 U TM SF 273401024 3/2/2011 Nb-95 1.59E+00 8.09E-01 2.49E+00 U TM SF 273401024 3/2/2011 Ru-103 -4.87E-01 7.15E-01 2.33E+00 U D-62

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION . LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 273401024 3/2/2011 Ru-106 -1.13E+00 6.13E+00 2.01E+01 U TM SF 273401024 3/2/2011 Sb-124 -6.45E-02 1.40E+00 4.62E+00 U TM SF 273401024 3/2/2011 Sb-125 9.76E-01 1.91E+00 6.15E+00 U TM SF 273401024 3/2/2011 Se-75 7.56E-01 9.33E-01 3.07E+00 U TM SF 273401024 3/2/2011 Th-228 2.59E+00 3.23E+00 6.34E+00 U TM SF 273401024 3/2/2011 Zn-65 1.74E+00 1.97E+00 6.5 11E+00 U TM SF 273401024 3/2/2011 Zr-95 8.71E-01 1.34E+00 4.40E+00 U TM LF 273401025 3/2/2011 Ac-228 9.70E+00 3.86E+00 9.32E+00 UI TM LF 273401025 3/2/2011 Ag-108m -8.91E-02 5.89E-01 1.88E+00 U TM LF 273401025 3/2/2011 Ag-I l0m -8.18E-01 6.56E-01 2.OOE+00 U TM LF 273401025 3/2/2011 Ba- 140 6.58E-01 8.88E-01 2.94E+00 U TM LF 273401025 3/2/2011 Be-7 -2.28E+00 5.40E+00 1.79E+01 U TM LF 273401025 3/2/2011 Ce- 141 2.65E+00 2.101E+00 3.78E+00 U TM LF 273401025 3/2/2011 Ce- 144 4.68E+00 4.92E+00 1.54E+01 U TM LF 273401025 3/2/2011 Co-57 -4.87E-01 6.39E-01 1.98E+00 U TM LF 273401025 3/2/2011 Co-58 5.46E-01 6.77E-01 2.22E+00 U TM LF 273401025 3/2/2011 Co-60 7.13E-01 7.40E-01 2.45E+00 U

TM LF 273401025 3/2/2011 Cr-51 -4.39E+00 6.22E+00, 1.98E+01 U TM LF 273401025 3/2/2011 Cs-134 -3.47E-01 8.33E-01 2.67E+00 U TM LF 273401025 3/2/2011 Cs-137 6.49E-02 6.97E-01 2.31E+00 U TM LF 273401025 3/2/2011 Fe-59 5.95E-01 1.50E+00 5.03E+00 U TM LF 273401025 3/2/2011 1-131 -1.78E+00 1.10E+00 3.17E+00 U TM LF 273401025 3/2/2011 1-131 -2.39E-01 2.04E-01 6.32E-01 U TM LF 273401025 3/2/2011 K-40 1.46E+03 7.24E+01 1.74E+01 TM LF 273401025 3/2/2011 La-140 6.58E-01 8.88E-01 2.94E+00 U TM LF 273401025 3/2/2011 Mn-54 1.05E-01 6.70E-01 2.18E+00 U TM LF 273401025 3/2/2011 Nb-95 7.73E-01 7.23E-01 2.35E+00 U TM LF 273401025 3/2/2011 Ru-103 -2.111E-01 6.35E-01 2.11E+00 U TM LF 273401025 3/2/2011 Ru-106 4.12E+00 5.82E+00 1.94E+01 U TM LF 273401025 3/2/2011 Sb-124 2.58E-01 1.43E+00 4.81E+00 U TM LF 273401025 3/2/2011 Sb-125 2.42E-01 1.85E+00 5.94E+00 U TM LF 273401025 3/2/2011 Se-75 -6.21E-01 9.15E-01 2.95E+00 U TM LF 273401025 3/2/2011 Th-228 1.23E+00 1.84E+00 4.38E+00 U TM LF 273401025 3/2/2011 Zn-65 -1.33E+00 1.65E+00 5.26E+00 U TM LF 273401025 3/2/2011 Zr-95 -3.95E-01 1.20E+00 3.88E+00 U TM MR 274196023 3/16/2011 Ac7228 7.29E-01 2.54E+00 8.55E+00 U TM MR 274196023 3/16/2011 Ag-108m -7.23E-01 5.89E-01 1.84E+00 U TM MR 274196023 3/16/2011 Ag- li0m -5.79E-01 7.03E-01 1.89E+00 U TM MR 274196023 3/16/2011 Ba- 140 3.5 11E-01 8.05E-01 2.65E+00 U TM MR 274196023 3/16/2011 Be-7 -2.45E+00 5.39E+00 1.76E+01 U TM MR 274196023 3/16/2011 Ce-141 2.06E-01 1.91E+00 3.811E+00 U TM MR 274196023 3/16/2011 Ce- 144 5.65E+00 4.93E+00 1.58E+01 U TM MR 274196023 3/16/2011 Co-57 -1.50E-01 6.27E-01 2.07E+00 U TM MR 274196023 3/16/2011 Co-58 -4.96E-01 6.57E-01 2.04E+00 U TM MR 274196023 3/16/2011 Co-60 -3.17E-01 6.83E-01 2.19E+00 U TM MR 274196023 3/16/2011 Cr-51 -8.23E-01 5.74E+00 1.93E+01 U TM MR 274196023 3/16/2011 Cs-134 1.14E+00 8.08E-01 2.56E+00 U TM MR 274196023 3/16/2011 Cs-137 2.23E+00 9.39E-01 2.13E+00 UI M TM MR 274196023 3/16/2011 Fe-59 -5.09E-01 1.49E+00 4.88E+00 U TM MR 274196023 3/16/2011 1-131 -5.02E-01 1.0 1E+00 3.35E+00 U TM MR 274196023 3/16/2011 1-131 1.89E-01 2.28E-01 7.46E-01 U D-63

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 274196023 3/16/20 11 K-40 1.92E+03 9.53E+01 1.88E+01 TM MR 274196023 3/16/2011 La-140 3.51E-01 8.05E-0 I 2.65E+00 U TM MR 274196023 3/16/2011 Mn-54 -1.27E+00 7.27E-01 2.03E+00 U TM MR 274196023 3/16/2011 Nb-95 1.31E-01 6.46E-01 2.10E+00 U TM MR 274196023 3/16/2011 Ru-103 -4.86E-01 6.77E-01 2.18E+00 U TM MR 274196023 3/16/2011 Ru-106 -6.46E-02 5.73E+00 1.88E+01 U TM MR 274196023 3/16/2011 Sb-124 -1.43E+00 1.24E+00 3.60E+00 U TM MR 274196023 3/16/2011 Sb-125 -1.98E+00 1.80E+00 5.69E+00 U TM MR 274196023 3/16/2011 Se-75 8.55E-01 9.55E-01 3.04E+00 U TM MR 274196023 3/16/2011 Th-228 4.38E+00 2.97E+00 5.01E+00 U TM MR 274196023 3/16/2011 Zn-65 1.85E+00 1.93E+00 5.55E+00 U TM MR 274196023 3/16/2011 Zr-95 -1.17E+00 1.1 7E+00 3.60E+00 U TM SF 274196024 3/16/201.1 Ac-228 -6.19E-02 4.22E+00 1.07E+01 U TM SF 274196024 3/16/2011 Ag-108m 3.29E-01 6.36E-01 2.08E+00 U TM SF 274196024 3/16/2011 Ag-il0m -1.48E+00 7.35E-01 2.03E+00 U TM SF 274196024 3/16/2011 Ba- 140 -1.89E-01 1.03E+00 3.39E+00 U TM SF 274196024 3/16/2011 Be-7 8.13E+00 6.23E+00 1.98E+01 U TM SF 274196024 3/16/2011 Ce- 141 2.34E+00 1.37E+00 3.80E+00 U TM SF 274196024 3/16/2011 Ce-I144 -1.38E+00 4.30E+00 1.41E+01 U TM SF 274196024 3/16/2011 Co-57 -8.32E-01 5.96E-01 1.83E+00 U TM SF 274196024 3/16/2011 Co-58 -5.81E-01 7.55E-01 2.37E+00 U TM SF 274196024 3/16/2011 Co-60 5.67E-02 8.39E-01 2.75E+00 U TM SF 274196024 3/16/2011 Cr-51 -1.80E+00 6.03E+00 2.OOE+01 U TM SF 274196024 3/16/2011 Cs-134 7.97E-01 9.33E-01 3.06E+00 U TM SF 274196024 3/16/2011 Cs-137 1.77E+00 8.26E-01 2.52E+00 U TM SF 274196024 3/16/2011 Fe-59 -4.85E-01 1.68E+00 5.52E+00 U TM SF 274196024 3/16/2011 1-131 -1.79E+00 1.14E+00 3.37E+00 U TM SF 274196024 3/16/2011 1-131 -2.44E-01 1.81E-01 5.65E-01 U TM SF 274196024 3/16/2011 K-40 1.47E+03 7.78E+01 2.12E+01 TM SF 274196024 3/16/2011 La-140 -1.89E-01 1.03E+00 3.39E+00 U TM SF 274196024 3/16/2011 Mn-54 1.95E-01 7.60E-01 2.49E+00 U TM SF 274196024 3/16/2011 Nb-95 -3.13E-01 7.57E-01 2.45E+00 U TM SF 274196024 3/16/2011 Ru-103 -1.04E+00 7.58E-01 2.22E+00 U TM SF 274196024 3/16/2011 Ru-106 -5.95E+00 6.38E+00 2.03E+01 U TM SF 274196024 3/16/2011 Sb-124 8.86E-01 1.43E+00 4.82E+00 U TM SF 274196024 3/16/2011 Sb-125 -1.08E+00 1.89E+00 6.01E+00 U TM SF 274196024 3/16/20 11 Se-75 -2.87E-01 8.64E-01 2.90E+00 U TM SF 274196024 3/16/2011 Th-228 1.31E+00 2.20E+00 4.40E+00 U TM SF 274196024 3/16/2011 Zn-65 -3.12E+00 2.OOE+00 5.93E+00 U TM SF 274196024 3/16/2011 Zr-95 -1.38E+00 1.30E+00 4.02E+00 U TM LF 274196025 3/16/2011 Ac-228 -2.63E+00 4.19E+00 1.09E+01 U TM LF 274196025 3/16/2011 Ag-108m 9.90E-02 6.67E-01 2.16E+00 U TM LF 274196025 3/16/2011 Ag-Il0m -1.88E-01 6.70E-01 2.20E+00 U TM LF 274196025 3/16/2011 Ba-140 2.42E-01 9.85E-01 3.33E+00 U TM LF 274196025 3/16/2011 Be-7. -1.66E+00 6.15E+00 1.95E+01 U TM LF 274196025 3/16/2011 Ce- 141 2.39E-02 1.39E+00 3.95E+00 U TM LF 274196025 3/16/2011 Ce- 144 -5.64E+00 5.08E+00 1.55E+01 U TM LF 274196025 3/16/2011 Co-57 5.17E-01 6.31E-01 2.02E+00 U TM LF 274196025 3/16/2011 Co-58 -9.19E-01 7.97E-01 2.34E+00 U TM LF 274196025 3/16/2011 Co-60 6.04E-01 8.57E-01 2.84E+00 U TM LF 274196025 3/16/2011 Cr-51 -2.95E+00 6.58E+00 2.14E+01 U D-64

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 274196025 3/16/2011 Cs-134 -2.06E-'01 9.73E-01 2.96E+00 U TM LF 274196025 3/16/2011 Cs-137 1.48E-01 7.59E-01 2.52E+00 U TM LF 274196025 3/16/2011 Fe-59 -1.69E+00 1.74E+00 5.48E+00 U TM LF 274196025 3/16/2011 1-131 -2.98E-02 2.13E-01 6.99E-01 U TM LF 274196025 3/16/2011 1-131 -6.44E-01 1.16E+00 3.70E+00 U TM LF 274196025 3/16/2011 K-40 1.39E+03 7.34E+01 2.49E+01 TM LF 274196025 3/16/2011 La-140 2.42E-01 9.84E-01 3.33E+00 U TM LF 274196025 3/16/2011 Mn-54 2.81E-01 7.12E-01 2.33E+00 U TM LF 274196025 3/16/2011 Nb-95 1.56E+00 8.10E-01 2.51E+00 U TM LF 274196025 3/16/2011 Ru-103 -1.77E+00 8.35E-01 2.30E+00 U TM LF 274196025 3/16/2011 Ru-106 -4.23E+00 6.39E+00 2.06E+01 U TM LF 274196025 3/16/2011 Sb-124 -4.79E-01 1.63E+00 5.33E+00 U TM LF 274196025 3/16/2011 Sb-125 -3.79E+00 2.1OE+00 5.85E+00 U TM LF 274196025 3/16/2011 Se-75 -1.88E-01 9.72E-01 3.22E+00 U TM LF 274196025 3/16/2011 Th-228 4.06E-01 2.08E+00 4.80E+00 U TM LF 274196025 3/16/2011 Zn-65 -3. 1OE+00 2.03E+00 6.01E+00 U TM LF 274196025 3/16/2011 Zr-95 7.53E-01 1.30E+00 4.30E+00 U TM MR 275048023 3/30/2011 Ac-228 -2.3 1E+00 4.62E+00 1.26E+01 U TM MR 275048023 3/30/2011 Ag-108m 1.76E-01 7.3 1E-01 2.37E+00 U TM MR 275048023 3/30/2011 Ag- llI0m 9.12E-03 7.78E-01 2.57E+00 U TM MR 275048023 3/30/2011 Ba-140 -6.35E-01 1.19E+00 3.49E+00 U TM MR 275048023 3/30/2011 Be-7 -5.17E+00 7.07E+00 2.18E+01 U TM MR 275048023 3/30/2011 Ce- 141 -1.06E+00 1.40E+00 4.37E+00 U TM MR 275048023 3/30/2011 Ce- 144 8.67E-01 5.51E+00 1.78E+01 U TM MR 275048023 3/30/2011 Co-57 6.01E-01. 7.33E-01 2.35E+00 U TM MR 275048023 3/30/2011 Co-58 7.46E-01 8.61E-01 2.82E+00 U TM MR 275048023 3/30/2011 Co-60 -9.06E-01 1.01E+00 3.12E+00 U TM MR 275048023 3/30/2011 Cr-51 -5.47E+00 7.55E+00 2.41E+01 U TM MR 275048023 3/30/2011 Cs-134 1.41E+00 1.09E+00 3.53E+00 U TM MR 275048023 3/30/2011 Cs-137 1.39E+00 9.11E-01 2.94E+00 U TM MR 275048023 3/30/2011 Fe-59 -4.60E+00 2.39E+00 6.65E+00 U TM MR 275048023 3/30/2011 1-131 1.38E+00 2.59E-01 6.16E-01 TM MR 275048023 3/30/2011 1-131 3.28E+00 1.56E+00 4.63E+00 U TM MR 275048023 3/30/2011 K-40 1.90E+03 9.83E+01 2.67E+01 TM MR 275048023 3/30/2011 La-140 -6.35E-01 1.19E+00 3.49E+00 U TM MR 275048023 3/30/2011 Mn-54 -8.33E-01 8.49E-01 2.60E+00 U TM MR 275048023 3/30/2011 Nb-95 1.25E+00 8.89E-01 2.86E+00 U TM MR 275048023 3/30/2011 Ru-103 -7.60E-03 7.98E-01 2.69E+00 U TM MR 275048023 3/30/2011 Ru-106 5.05E+00 7.26E+00 2.42E+01 U TM MR 275048023 3/30/2011 Sb-124 -1.86E-01 1.56E+00 5.16E+00 U TM MR 275048023 3/30/2011 Sb-125 6.27E-01 2.21E+00 7.16E+00 U TM MR 275048023 3/30/2011 Se-75 2.39E-01 1.11E+00 3.70E+00 U TM MR 275048023 3/30/2011 Th-228 -2.75E+00 2.25E+00 5.42E+00 U TM MR 275048023 3/30/2011 Zn-65 -7.82E-01 2.16E+00 7.07E+00 U TM MR 275048023 3/30/2011 Zr-95 1.38E+00 1.47E+00 4.82E+00 U TM SF 275667001 4/6/2011 Ac-228 -7.91E+00 3.80E+00 9.02E+00 U TM SF 275667001 4/6/2011 Ag-108m 8.69E-01 5.50E-01 1.76E+00 U TM SF 275667001 4/6/2011 Ag-Il0m 2.1OE-01 5.92E-01 1.92E+00 U TM SF 275667001 4/6/2011 Ba- 140 -7.40E-01 8.62E-01 2.69E+00 U TM SF 275667001 4/6/2011 Be-7 -1.54E+00 5.07E+00 1.64E+01 U TM SF 275667001 4/6/2011 Ce- 141 1.63E+00 1.13E+00 3.53E+00 U D-65

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCiIL)

TM SF 275667001 4/6/2011 Ce-144 1.15E+00 4.05E+00 1.32E+01 U TM SF 275667001 4/6/2011 Co-57 -7.44E-01 5.73E-01 1.74E+00 U TM SF 275667001 4/6/2011 Co-58 -1.16E+00 6.70E-01 1.93E+00 U TM SF 275667001 4/6/2011 Co-60 1.47E+00 7.52E-01 2.36E+00 U TM SF 275667001 4/6/2011 Cr-51 -6.83E-01 5.49E+00 1.84E+01 U TM SF 275667001 4/6/2011 Cs-134 -1.27E-01 7.17E-01 2.39E+00 U TM SF 275667001 4/6/2011 Cs-137 -2.18E-01 6.45E-01 2.04E+00 U TM SF 275667001 4/6/2011 Fe-59 2.35E+00 1.55E+00 5.OOE+00 U TM SF 275667001 4/6/2011 1-131 3.13E-01 1.01E+00 3.38E+00 U TM SF 275667001 4/6/2011 1V131 5.51E-02 1.83E-01 6.20E-01 U TM SF 275667001 4/6/2011 K-40 1.57E+03 7.72E+01 1.72E+01 TM SF 275667001 4/6/2011 La-140 -7.40E-01 8.61E-01 2.69E+00 U TM SF 275667001 4/6/2011 Mn-54 -2.30E-01 6.03E-01 1.99E+00 U TM SF 275667001 4/6/2011 Nb-95 2.84E-01 5.97E-01 2.02E+00 U TM SF 275667001 4/6/2011 Ru-103 -1.61E+00 7.17E-01 1.83E+00 U TM SF 275667001 4/6/2011 Ru-106 3.26E+00 5.36E+00 1.75E+01 U TM SF 275667001 4/6/2011 Sb-124 2.27E-01 1.13E+00 3179E+00 U TM SF 275667001 4/6/2011 Sb-125 1.00E+00 1.60E+00 5.30E+00 U TM SF 275667001 4/6/2011 Se-75 1.71E+00 9.05E-01 2.84E+00 U TM SF 275667001 4/6/2011 Th-228 -4.01E+00 1.73E+00 3.94E+00 U TM SF 275667001 4/6/2011 Zn-65 - 1.11 E+00 1.54E+00 4.85E+00 U TM SF 275667001 4/6/2011 Zr-95 -9.68E-01 1.08E+00 3.44E+00 U

TM LF 275667002 4/6/2011 Ac-228 1.16E+00 5.75E+00 1.51E+01 U TM LF 275667002 4/6/2011 Ag-108m -1.04E-02 7.83E-01 2.53E+00 U TM LF 275667002 4/6/2011 Ag-110m -1.11E+00 9.71E-01 2.98E+00 U TM LF 275667002 4/6/2011 Ba-140 -2.29E+00 1.76E+00 4.95E+00 U TM LF 275667002 4/6/2011 Be-7 2.56E+00 7.91E+00 2.56E+01 U TM LF 275667002 4/6/2011 Ce-141 9.25E-01 1.48E+00 4.73E+00 U TM LF 275667002 4/6/2011 Ce-144 -6.21E+00 5.76E+00 1.75E+01 U TM LF 275667002 4/6/2011 Co-57 4.74E-01 7.07E-01 2.28E+00 U TM LF 275667002 4/6/2011 Co-58 6.01E-02 1.01E+00 3.33E+00 U TM LF 275667002 4/6/2011 Co-60 -1.07E+00 1.13E+00 3.45E+00 U TM LF 275667002 4/6/2011 Cr-51 1.84E+01 9.11E+00 2.79E+01 U TM LF 275667002 4/6/2011 Cs-134 2.12E+00 1.26E+00 4.07E+00 U TM LF 275667002 4/6/2011 Cs-137 1.90E-01 1.00E+00 3.35E+00 U TM LF 275667002 4/6/2011 Fe-59 2.11E+00 2.42E+00 8.20E+00 U TM LF 275667002 4/6/2011 1-131 8.87E-01 3.20E-01 8.49E-01 UI M TM LF 275667002 4/6/2011 1-131 3.05E+00 1.69E+00 5.26E+00 U TM LF 275667002 4/6/2011 K-40 1.40E+03 7.55E+01 3.32E+01 TM LF 275667002 4/6/2011 La-140 -2.29E+00 1.75E+00 4.95E+00 U TM LF 275667002 4/6/2011 Mn-54 5.78E-01 9.46E-01 3.14E+00 U TM LF 275667002 4/6/2011 Nb-95 1.39E+00 9.81E-01 3.22E+00 U TM LF 275667002 4/6/2011 Ru-103 -2.69E+00 1.14E+00 2.70E+00 U TM LF 275667002 4/6/2011 Ru-106 2.34E+00 8.12E+00 2.73E+01 U TM LF 275667002 4/6/2011 Sb-124 1.39E-01 2.43E+00 7.90E+00 U TM LF 275667002 4/6/2011 Sb-125 7.01E+00 2.89E+00 8.42E+00 U TM LF 275667002 4/6/2011 Se-75 7.59E-01 1.15E+00 3.85E+00 U TM LF 275667002 4/6/2011 Th-228 2.22E+00 2.75E+00' 6.03E+00 U TM LF 275667002 4/6/2011 Zn-65 -5.28E+00 2.87E+00 8.03E+00 U TM LF 275667002 4/6/2011 Zr-95 2.86E-01 1.71E+00 5.66E+00 U TM MR 276211023 4/13/2011 Ac-228 2.26E+00 4.27E+00 7.78E+00 U D-66

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 276211023 4/13/2011 Ag-108m -5.15E-01 4.78E-01 1.51E+00 U TM MR 276211023 4/13/2011 Ag-lI0m 6.04E-01 6.25E-01 1.80E+00 U TM MR 276211023 4/13/2011 Ba-140 -1.93E+00 9.31E-01 2.36E+00 U TM MR 276211023 4/13/2011 Be-7 -1.39E+00 4.73E+00 1.56E+01 U TM MR 276211023 4/13/2011 Ce-141 -7.83E-01 1.37E+00 2.98E+00 U TM MR 276211023 4/13/2011 Ce-144 3.01E+00 3.48E+00 1.16E+01 U TM MR 276211023 4/13/2011 Co-57 4.92E-02 4.41E-01 1.49E+00 U TM MR 276211023 4/13/2011 Co-58 5.22E-01 5.72E-01 1.94E+00 U TM MR 276211023 4/13/2011 Co-60 3.32E-01 6.81E-01 2.23E+60, U TM MR 276211023 4/13/2011 Cr-51 9.04E-01 5.22E+00 1.67E+01 U TM MR 276211023 4/13/2011 Cs-134 -8.90E-01 7.32E-01 2.15E+00 U TM MR 276211023 4/13/2011 Cs-137 2.60E+00 6.85E-01 2.04E+00 M TM MR 276211023 4/13/2011 Fe-59 1.09E+00 1.49E+00 4.93E+00 U TM MR 276211023 4/13/2011 1-131 1.48E+00 3.69E-01 6.61E-01 TM MR 276211023 4/13/2011 1-131 1.27E+00 1.04E+00 3.47E+00 U TM MR 276211023 4/13/2011 K-40 1.68E+03 8.15E+01 1.92E+01 TM MR 276211023 4/13/2011 La-140 -1.93E+00 9.27E-01 2.36E+00 U TM MR 276211023 4/13/2011 Mn-54 4.19E-02 5.37E-01 1.81E+00 U TM MR 276211023 4/13/2011 Nb-95 1.49E-01 6.04E-01 1.95E+00 U TM MR 276211023 4/13/2011 Ru-103 -1.43E-01 6.64E-01 1.92E+00 U TM MR 276211023 4/13/2011 Ru-106 3.47E+00 5.12E+00 1.68E+01 U TM MR 276211023 4/13/2011 Sb-124 -9.96E-01 1.26E+00 3.94E+00 U TM MR 276211023 4/13/2011 Sb-125 -1.63E+00 1.50E+00 4.76E+00 U TM MR 276211023 4/13/2011 Se-75 -5.36E-01 7.55E-01 2.37E+00 U TM MR 276211023 4/13/2011 Th-228 1.18E+00 2.02E+00 3.52E+00 U TM MR 276211023 4/13/2011 Zn-65 -2.02E+00 1.56E+00 4.69E+00 U TM MR 276211023 4/13/2011 Zr-95 3.11E-01 1.02E+00 3.29E+00 U TM SF 276211024 4/13/2011 Ac-228 1.30E+00 2.47E+00 8.33E+00 U TM SF 276211024 4/13/2011 Ag-108m -1.40E-01 5.50E-01 1.82E+00 U TM SF 276211024 4/13/2011 Ag-llnm -2.19E+00 8.76E-01 1.79E+00 U TM SF 276211024 4/13/2011 Ba-140 -2.19E+00 9.53E-01 2.23E+00 U TM SF 276211024 4/13/2011 Be-7 -6.27E+00 5.48E+00 1.71E+01 U TM SF 276211024 4/13/2011 Ce-141 -9.28E-01 1.59E+00 3.91E+00 U TM SF 276211024 4/13/2011 Ce-144 -2.91E+00 4.84E+00 1.51E+01 U TM SF 276211024 4/13/2011 Co-57 2.72E-01 6.06E-01 2.OOE+00 U TM SF 276211024 4/13/2011 Co-58 2.58E-01 6.45E-01 2.09E+00 U TM SF 276211024 4/13/2011 Co-60 3.49E-02 6.79E-01 2.23E+00 U TM SF 276211024 4/13/2011 Cr-51 -1.52E+00 5.70E+00 1.91E+01 U TM SF 276211024 4/13/2011 Cs-134 1.18E+00 7.83E-01 2.47E+00 U TM SF 276211024 4/13/2011 Cs-137 8.44E-01 6.80E-01 2.19E+00 U TM SF 276211024 4/13/2011 Fe-59 -7.56E-01 1.39E+00 4.51E+00 U TM SF 276211024 4/13/2011 1-131 -4.36E-01 9.86E-01 3.27E+00 U TM SF 276211024 4/13/2011 1-131 2.41E-01 2.20E-01 7.16E-01 U TM SF 276211024 4/13/2011 K-40 1.49E+03 7.58E+01. 1.88E+01 TM. SF 276211024 4/13/2011 La-140 -2.19E+00 9.49E-01 2.23E+00 U TM SF 276211024 4/13/2011 Mn-54 4.OOE-01 6.24E-01 2.02E+00 U TM SF 276211024 4/13/2011 Nb-95 1.20E+00 7.06E-01 2.19E+00 U TM SF 276211024 4/13/2011 Ru-103 -2.56E-01 6.33E-01 2.07E+00 U TM SF 276211024 4/13/2011 Ru-106 -1.70E-01 5.61E+00 1.84E+01 U TM SF 276211024 4/13/2011 Sb-124 1.42E+00 1.26E+00 4.16E+00 U TM SF 276211024 4/13/2011 Sb-125 -1.70E+00 1.74E+00 5.54E+00 U D-67

Donald C. Cook Nuclear Plaýt' Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 276211024 4/13/2011 Se-75 1.22E-01 9.02E-01 2.9 1E+00 U TM SF 276211024 4/13/2011 Th-228 -4.86E-01 1.99E+00 4.66E+00 U TM SF 276211024 4/13/2011 Zn-65 -7.22E-01 1.52E+00 4.94E+00 U TM SF 276211024 4/13/2011 Zr-95 6.64E-01 1.19E+00 3.89E+00 U TM LF 276211025 4/13/2011 Ac-228 8.51E+00 3.77E+00 1.14E+01 U TM LF 276211025 4/13/2011 Ag-108m 1.12E+00 6.54E-01 2.08E+00 U TM LF 276211025 4/13/2011 Ag-110m 6.95E-02 7.78E-01 2.50E+00 U TM LF 276211025 4/13/2011 Ba- 140 8.01E-01 1.18E+00 3.97E+00 U TM LF 276211025 4/13/2011 Be-7 3.50E+00 5.79E+00 1.92E+01 U TM LF 276211025 4/13/2011 Ce-I141 2.47E+00 1.29E+00 3.18E+00 U TM LF 276211025 4/13/2011 Ce- 144 1.84E+00 3.65E+00 1.21E+01 U TM LF 276211025 4/13/2011 Co-57 5.31E-01 4.86E-01 1.60E+00 U TM LF 276211025 4/13/2011 Co-58 1.23E+00 8;48E-01 2.78E+00 U TM LF 276211025 4/13/2011 Co-60 3.05E-01 9.33E-01 3.15E+00 U TM LF 276211025 4/13/2011 Cr-51 -3.86E+00 5.97E+00 .1.97E+01 U TM LF 276211025 4/13/2011 Cs-134 1.42E+00 1.02E+00 3.36E+00 U TM LF 276211025 4/13/2011 Cs-137 4.70E-01 8.25E-01 2.67E+00 U TM LF 276211025 4/13/2011 Fe-59 3.22E+00 2.08E+00 6.62E+00 U TM LF 276211025 4/13/2011 1-131 6.05E-01 3.05E-01 9.23E-01 U TM LF 276211025 4/13/2011 1-131 2.90E+00 1.29E+00 3.88E+00 U TM LF 276211025 4/13/2011 K-40 1.41E+03 7.20E+01 2.79E+0 I TM LF 276211025 4/13/2011 La-140 8.01E-01 1.18E+00 3.97E+00 U TM LF 276211025 4/13/2011 Mn-54 -7.81E-0I 8.09E-01 2.54E+00 U TM LF 276211025 4/13/2011 Nb-95 5.43E-01, 8.26E-01 2.78E+00 U TM LF 276211025 4/13/2011 Ru-103 -8.70E-01 7.93E-01 2.43E+00 U TM LF 276211025 4/13/2011 Ru-106 7.15E+00 7. 1OE+00 2.29E+01 U TM LF 276211025 4/13/2011 Sb-124 -1.90E+00 1.87E+00 5.57E+00 U TM LF 276211025 4/13/2011 Sb-125 3.37E+00 1.92E+00 6.09E+00 U TM LF 276211025 4/13/2011 Se-75 2.48E-01 8.56E-01 2.74E+00 U TM LF 276211025 4/13/2011 Th-228 -1.74E+00 1.85E+00 4.71E+00 U TM LF 276211025 4/13/2011 Zn-65 1.78E+00 2.06E+00 6.75E+00 U TM LF 276211025 4/13/2011 Zr-95 1.98E-01 1.46E+00 4.911E+00 U TM MR 277144023 4/27/2011 Ac-228 3.21E+00 2.96E+00 9.90E+00 U TM MR 277144023 4/27/2011 Ag-108m 4.64E-01 5.44E-01 1.83E+00 U TM MR 277144023 4/27/2011 Ag-l10m -1.40E+00 7.66E-01 2. 1OE+00 U TM MR 277144023 4/27/2011 Ba- 140 -1.57E-02 1.01E+00 3.38E+00 U TM MR 277144023 4/27/2011 Be-7 1.55E+00 5.37E+00 1.80E+01 U TM MR 277144023 4/27/2011 Ce- 141 -3.61E--01 1.09E+00 3.61E+00 U TM MR 277144023 4/27/2011 Ce- 144 6.96E-01 4.09E+00 1.38E+01 U TM MR 277144023 4/27/2011 Co-57 -1.57E-01 5.24E-01 1.76E+00 U TM MR 277144023 4/27/2011 Co-58 6.58E-01 7.30E-01 2.48E+00 U TM MR 277144023 4/27/2011 Co-60 7.66E-01 8.29E-01 2.73E+00 U TM MR 277144023 4/27/2011 Cr-51 9.38E+00 6.87E+00 2.15E+01 U TM MR 277144023 4/27/2011 Cs-134 -1.64E+00 9.59E-01 2.60E+00 U TM MR 277144023 4/27/2011 Cs-137 2.26E+00 9.14E-01 2.65E+00 U TM MR 277144023 4/27/2011 Fe-59 2.11E+00 1.78E+00 5.85E+00 U TM MR 277144023 4/27/2011 1-131 1.36E+00 4.5 1E-01 8.OOE-01 UI TM MR 277144023 4/27/2011 1-131 6.87E-01 1.20E+00 4. I OE+00 U TM MR 277144023 4/27/2011 K-40 1.80E+03 8.95E+01 2.01E+01 TM MR 277144023 4/27/2011 La-140 -1.57E-02 1.01E+00 3.38E+00 U TM MR 277144023 4/27/2011 Mn-54 3.78E-01 6.60E-01 2.25E+00 U D-68

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 277144023 4/27/2011 Nb-95 1.74E+00 8.47E-01 2.58E+00 U TM MR 277144023 4/27/2011 Ru-103 -1.26E+00 7.62E-01 2.20E+00 U TM MR 277144023 4/27/2011 Ru-106 2.5 1E+00 6.09E+00 2.01E+01 U TM MR 277144023 4/27/2011 Sb-124 1.10E+00 1.33E+00 4.57E+00 U TM MR 277144023 4/27/2011 Sb-125 -2.98E-01 1.61E+00 5.36E+00 U TM MR 277144023 4/27/2011 Se-75 7.63E-01 9.16E-01 2.96E+00 U TM MR 277144023 4/27/2011 Th-228 1.80E+00 2.18E+00 4.48E+00 U TM MR 277144023 4/27/2011 Zn-65 -1.65E+00 1.84E+00 5.74E+00 U TM MR 277144023 4/27/2011 Zr-95 8.90E-01 1.21E+00 3.95E+00 U TM SF 277144024 4/27/2011 Ac-228 7.35E+00 4.62E+00 1.13E+01 U TM SF 277144024 4/27/2011 Ag-108m -2.69E-01 6.20E-01 1.99E+00 U TM SF 277144024 4/27/2011 Ag-Il0m -2.26E+00 8.5 1E-01 2.03E+00 U TM SF 277144024 4/27/2011 Ba- 140 7.70E-01 1.12E+00 3.77E+00 U TM SF 277144024 4/27/2011 Be-7 -3.73E+00 5.95E+00 1.87E+01 U TM SF 277144024 4/27/2011 Ce- 141 -3.62E+00 1.97E+00 3.78E+00 U TM SF 277144024 4/27/2011 Ce- 144 2.38E+00 4.41E+00 1.45E+01 U TM SF 277144024 4/27/2011 Co-57 -3.61E-01 5.66E-01 1.84E+00 U TM SF 277144024 4/27/2011 Co-58 3.19E-01 7.81E-01 2.56E+00 U TM SF 277144024 4/27/2011 Co-60 6.52E-01 7.68E-01 2.54E+00 U TM SF 277144024 4/27/2011 Cr-51 1.09E+01 6.86E+00 2.18E+01 U TM SF 277144024 4/27/2011 Cs-134 -3.65E-01 8.86E-01 2.85E+00 U TM SF 277144024 4/27/2011 Cs-137 2.70E+00 9.69E-01 2.65E+00 UI M TM SF 277144024 4/27/2011 Fe-59 3.86E-01 1.75E+00 5.85E+00 U TM SF 277144024 4/27/2011 1-131 -5.OOE-01 1.17E+00 3.81E+00 U TM SF 277144024 4/27/2011 1-131 1.37E-01 2.29E-01 7.48E-01 U TM SF 277144024 4/27/2011 K-40 1.47E+03 7.75E+01 2.12E+01 TM SF 277144024 4/27/2011 La-140 7.70E-01 1.12E+00 3.77E+00 TM SF 277144024 4/27/2011 Mn-54 -3.89E-01 7.5 1E-01 2.39E+00 TM SF 277144024 4/27/2011 Nb-95 1.70E+00 8.48E-01 2.60E+00 TM SF 277144024 4/27/2011 Ru-103 4.92E-01 7.55E-01 2.44E+00 TM SF 277144024 4/27/2011 Ru-106 6.17E+00 6.19E+00 2.06E+01 TM SF 277144024 4/27/2011 Sb-124 1.33E+00 1.51E+00 5.1OE+00 TM SF 277144024 4/27/2011 Sb-125 7.59E-01 1.86E+00 6.07E+00 TM SF 277144024 4/27/2011 Se-75 -8.37E-01 8.81E-01 2.86E+00 TM SF 277144024 4/27/2011 Th-228 3.37E+00 2.31E+00 4.38E+00 TM SF 277144024 4/27/2011 Zn-65 -4.60E+00 2.25E+00 6.17E+00 TM SF 277144024 4/27/2011 Zr-95 8.45E-01 1.30E+00 4.30E+00 TM LF 277144025 4/27/2011 Ac-228 2.5 1E+00 4.21E+00 9.42E+00 TM LF 277144025 4/27/2011 Ag-108m -4.08E-01 5.73E-01 1.82E+00 TM LF 277144025 4/27/2011 Ag-il0m -1.17E+00 6.54E-01 1.90E+00 TM LF 277144025 4/27/2011 Ba-140 9.43E-01 1.01E+00 3.36E+00 TM LF 277144025 4/27/2011 Be-7 -1.89E+00 5.15E+00 1.66E+01 TM LF 277144025 4/27/2011 Ce- 141 1.54E+00 1.21E+00 3.82E+00 TM LF 277144025 4/27/2011 Ce- 144 3.29E+00 4.41E+00 1.43E+01 TM LF 277144025 4/27/2011 Co-57 2.07E-01 5.69E-01 1.87E+00 TM LF 277144025 4/27/2011 Co-58 -6.41E-01 6.32E-01 1.97E+00 TM LF 277144025 4/27/2011 Co-60 1.46E+00 8.06E-01 2.59E+00 TM LF 277144025 4/27/2011 Cr-51 8.08E+00 6.01E+00 1.95E+01 TM LF 277144025 4/27/2011 Cs-134 -I.I1E+00 8.16E-01 2.47E+00 TM LF 277144025 4/27/2011 Cs-137 8.36E-01 6.87E-01 2.28E+00 TM LF 277144025 4/27/2011 Fe-59 7.54E-01 1.54E+00 5.03E+00 D-69

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 277144025 4/27/2011 1-131 -7.86E-02 1.94E-01 6.22E-01 U TM LF 277144025 4/27/2011 1-131 1.47E-01 1.04E+00 3.45E+00 U TM LF 277144025 4/27/2011 K-40 1.41E+03 7.47E+01 1.83E+01 TM LF 277144025 4/27/2011 La-140 9.43E-01 1.01E+00 3.36E+00 U TM LF 277144025 4/27/2011 Mn-54 -2.28E+00 8.13E-01 1.80E+00 U TM LF 277144025 4/27/2011 Nb-95 1.36E+00 7.01E-01 2.20E+00 U TM LF 277144025 4/27/2011 Ru-103 -3.89E-01 6.41E-01 2.03E+00 U TM LF 277144025 4/27/2011 Ru-106 -1.07E+01 5.74E+00 1.65E+01 U TM LF 277144025 4/27/2011 Sb-124 2.41E+00 1.36E+00 4.46E+00 U TM LF 277144025 4/27/2011 Sb-125 3.87E-01 1.65E+00 5.44E+00 U TM LF 277144025 4/27/2011 Se-75 6.98E-01 8.37E-01 2.81E+00 U TM LF 277144025 4/27/2011 Th-228 -8.73E-01 1.70E+00 4.10E+00 U TM LF 277144025 4/27/2011 Zn-65 -2.81E+00 1.82E+00 5.21E+00 U TM LF 277144025 4/27/2011 Zr-95 1.20E+00 1.13E+00 3.75E+00 U TM MR 278137023 5/11/2011 Ac-228 1.24E+01 5.41E+00 1.15E+01 UI TM MR 278137023 5/11/2011 Ag-108m -4.59E-01 6.72E-01 2.10E+00 U TM MR 278137023 5/11/2011 Ag-Il0m -2.99E-01 7.27E-01 2.37E+00 U TM MR 278137023 5/11/2011 Ba- 140 -2.06E+00 1.7]E+00 5.16E+00 U TM MR 278137023 5/11/2011 Be-7 1.08E+01 7.53E+00 2.35E+01 U TM MR 278137023 5/11/2011 Ce- 141 6.14E-01 1.58E+00 5.07E+00 U TM MR 278137023 5/11/2011 Ce- 144 7.64E+00 5.36E+00 1.65E+01 U TM MR 278137023 5/11/2011 Co-57 4.05E-01 6.64E-01 2.14E+00 U TM MR 278137023 5/11/2011 Co-58 -9.41E-02 8.60E-01 2.79E+00 U TM MR 278137023 5/11/2011 Co-60 -4.62E-02 9.01E-01 2.94E+00 U TM MR 278137023 5/11/2011 Cr-51 -4.79E+00 8.48E+00 2.74E+01 U TM MR 278137023 5/11/2011 Cs-134 -3.57E-01 9.85E-01 3.17E+00 U TM MR 278137023 5/11/2011 Cs-137 5.60E-01 7.89E-01 2.62E+00 U TM MR 278137023 5/11/2011 Fe-59 1.06E+00 2.04E+00 6.83E+00 U TM MR 278137023 5/11/2011 1-131 3.09E-01 2.77E-01 8.92E-01 U TM MR 278137023 5/11/2011 1-131 -1.60E+00 2.65E+00 8.44E+00 U TM MR 278137023 5/11/2011 K-40 1.90E+03 9.67E+01 2.43E+01 TM MR 278137023- 5/11/2011 La-140 -2.06E+00 1.71E+00 5.16E+00 U TM MR 278137023 5/11/2011 Mn-54 -4.08E-01 8.05E-01 2.56E+00 U TM MR 278137023 5/11/2011 Nb-95 -4.65E-01 8.32E-01 2.65E+00 U TM MR 278137023 5/11/2011 Ru-103 5.81E-01 8.37E-01 2.83E+00 U TM MR 278137023 5/11/2011 Ru-106 9.70E+00 7.24E+00 2.36E+01 U TM MR 278137023 5/11/2011 Sb- 124 -5.73E-01 1.67E+00 5.44E+00 U TM MR 278137023 5/11/2011 Sb-125 6.04E-01 2.09E+00 6.76E+00 U TM MR 278137023 5/11/2011 Se-75 -1.85E+00 1.14E+00 3.41E+00 U TM MR 278137023 5/11/2011 Th-228 -1.99E+00 2.30E+00 4.93E+00 U TM MR 278137023 5/11/2011 Zn-65 -3.99E+00 2.27E+00 6.51E+00 U TM MR 278137023 5/11/2011 Zr-95 -2.5 1E+00 1.59E+00 4.60E+00 U TM SF 278137024 5/11/2011 Ac-228 5.67E+00 3.02E+00 9.51E+00 U TM SF 278137024 5/11/2011 Ag-108m -4.62E-02 5.86E-01 1.93E+00 U TM SF 278137024 5/11/2011 Ag- llnm -1.25E+00 7.52E-01 2.15E+00 U TM SF 278137024 5/11/2011 Ba- 140 3.26E+00 1.67E+00 5.31E+00 U TM SF 278137024 5/11/2011 Be-7 4.01E+00 6.31E+00 2.08E+01 U TM SF 278137024 5/11/2011 Ce-I141 1.61E+00 1.64E+00 4.58E+00 U TM SF 278137024 5/11/2011 Ce-I144 -4.64E+00 4.66E+00 1.44E+01 U TM SF 278137024 5/11/2011 Co-57 1.23E+00 6.62E-01 1.98E+00 U TM SF 278137024 5/11/2011 Co-58 -5.61E-01 7.43E-01 2.41E+00 U D-70

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 278137024 5/11/2011 Co-60 1.90E+00 9.24E-01 2.85E+00 U TM SF 278137024 5/11/2011 Cr-51 1.03E+01 7.73E+00 2.5 1E+01 U TM SF 278137024 5/11/2011 Cs-134 1.18E+00 8.80E-01 2.91E+00 U TM SF 278137024 5/11/2011 Cs-137 2.40E-01 7.26E-01 2.37E+00 U TM SF 278137024 5/11/2011 Fe-59 3.23E+00 1.98E+00 6.33E+00 U TM SF 278137024 5/11/2011 1-131 8.19E-01 2.26E+00 7.5 1E+00 U TM SF 278137024 5/11/2011 1-131 -1.44E-01 3.68E-01 1.20E+00 U DL TM SF 278137024 5/11/2011 K-40 1.47E+03 7.31E+01 2.13E+01 U TM SF 278137024 5/11/2011 La-140 3.26E+00 1.67E+00 5.3 1E+00 U TM SF 278137024 5/11/2011 Mn-54 6.36E-01 6.71E-01 2.25E+00 U TM SF 278137024 5/11/2011 Nb-95 -7.65E-01 7.95E-01 2.43E+00 U TM SF 278137024 5/11/2011 Ru- 103 -4.37E-01 8.06E-01 2.59E+00 U TM SF 278137024 5/11/2011 Ru-106 1.85E+00 5.65E+00 1.85E+01 U TM SF 278137024 5/11/2011 Sb-124 2.51E-02 1.64E+00 5.32E+00 U TM SF 278137024 5/11/2011 Sb-125 -1.38E+00 1.80E+00 5.75E+00 TM SF 278137024 5/11/2011 Se-75 -1.88E-01 9.16E-01 3.06E+00 U TM SF 278137024 5/11/2011 Th-228 -1.29E+00 1.68E+00 4.33E+00 U TM SF 278137024 5/11/2011 Zn-65 -1.17E+00 1.75E+00 5.62E+00 U TM SF 278137024 5/11/2011 Zr-95 -1.74E+00 1.37E+00 4.05E+00 U TM LF 278137025 5/11/2011 Ac-228 1.15E+00 3.15E+00 8.66E+00 U TM LF 278137025 5/11/2011 Ag-108m -4.21E-01 5.95E-01 1.93E+00 U TM LF 278137025 5/11/2011 Ag-Il0m -4.61E-01 6.63E-01 2.1OE+00 U TM LF 278137025 5/11/2011 Ba-140 -3.29E-02 1.35E+00 4.38E+00 U TM LF 278137025 5/11/2011 Be-7 -1.98E+00 6.33E+00 2.08E+01 U TM LF 278137025 5/11/2011 Ce-141 2.20E+00 1.61E+00 4.92E+00 U TM LF 278137025 5/11/2011 Ce- 144 2.11E+00 4.96E+00 1.63E+01 U TM LF 278137025 5/11/2011 Co-57 -4.15E-01 6.59E-01 2.14E+00 U TM LF 278137025 5/11/2011 Co-58 -3.42E-01 7.37E-01 2.34E+00 U TM LF 278137025 5/11/2011 Co-60 2.46E+00 1.26E+00 2.79E+00 U TM LF 278137025 5/11/2011 Cr-51 5.40E+00 7.50E+00 2.52E+01 U TM LF 278137025 5/11/2011 Cs-134 -4.96E-01 7.95E-01 2.50E+00 U TM LF 278137025 5/11/2011 Cs-137 2.34E-01 6.95E-01 2.28E+00 U TM LF 278137025 5/11/2011 Fe-59 6.21E-01 1.66E+00 5.55E+00 U TM LF 278137025 5/11/2011 1-131 -6.12E-02 2.76E-01 9.26E-01 U TM LF 278137025 5/11/2011 1-131 4.85E-01 2.28E+00 7.65E+00 TM LF 278137025 5/11/2011 K-40 1.47E+03 7.49E+01 1.97E+01 U TM LF 278137025 5/11/2011 La-140 -3.29E-02 1.35E+00 4.38E+00 U TM LF 278137025 5/11/2011 Mn-54 -7.81E-01 6.96E-01 2.101E+00 U TM, LF 278137025 5/11/2011 Nb-95 -5.48E-02 6.94E-01 2.24E+00 U TM LF 278137025 5/11/2011 Ru-103 9.06E-02 7.67E-01 2.55E+00 U TM LF 278137025 5/11/2011 Ru-106 8.82E-02 5.66E+00 1.85E+01 U TM LF 278137025 5/11/2011 Sb-124 6.08E-01 1.41E+00 4.63E+00 U TM LF 278137025 5/11/2011 Sb-125 -1. 17E+00 1.83E+00 5.98E+00 U TM LF 278137025 5/11/2011 Se-75 -5.72E-02 1.00E+00 3.22E+00 U TM LF 278137025 5/11/2011 Th-228 -2.55E+00 2.02E+00 4.78E+00 U TM LF 278137025 5/11/2011 Zn-65 -1.70E+00 1.66E+00 5.22E+00 U TM LF 278137025 5/11/2011 Zr-95 -2.68E+00 1.43E+00 3.93E+00 U TM MR 278990023 5/25/2011 Ac-228 6.OOE+00 3.29E+00 1.04E+01 U TM MR 278990023 5/25/2011 Ag-108m -4.91E-01 5.91E-01 1.83E+00 U TM MR 278990023 5/25/2011 Ag-Ii0m -5.95E-01 6.76E-01 2.16E+00 U TM MR 278990023 5/25/2011 Ba-140 -4.29E-01 8.44E-01 2.70E+00 D-71

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 278990023 5/25/2011 Be-7 5.80E+00 6.19E+00 2.OOE+01 TM MR 278990023 5/25/2011 Ce- 141 -3.43E+00 1.80E+00 4.05E+00 TM MR 278990023 5/25/2011 Ce-I144 2.65E+00 4.72E+00 1.54E+01 TM MR 278990023 5/25/2011 Co-57 -2.15E-01 5.87E-01 1.97E+00 TM MR 278990023 5/25/2011 Co-58 -1.52E-01 7.43E-01 2.45E+00 TM MR 278990023 5/25/2011 Co-60 -6.96E-01 1.18E+00 3.01E+00 TM MR 278990023 5/25/2011 Cr-51 6.92E+00 6.52E+00 2.12E+01 TM MR 278990023 5/25/2011 Cs-134 1.83E+00 9.16E-01 2.89E+00 TM MR 278990023 5/25/2011 Cs-137 1.90E+00 8.58E-01 2.64E+00 TM MR 278990023 5/25/2011 Fe-59 -5.36E-02 1.74E+00 5.67E+00 TM MR 278990023 5/25/2011 1-131 1.04E-01 1.17E+00 3.81E+00 TM MR 278990023 5/25/2011 1-131 -1.24E-01 3.01E-01 9.78E-01 TM MR 278990023 5/25/2011 K-40 2.22E+03 1.16E+02 1.92E+01 TM MR 278990023 5/25/2011 La-140 -4.29E-01 8.44E-01 2.70E+00 TM MR 278990023 5/25/2011 Mn-54 2.05E-01 7.47E-01 2.49E+00 TM MR 278990023 5/25/2011 Nb-95 4.74E-01 7.15E-01 2.40E+00 TM MR 278990023 5/25/2011 Ru- 103 -1.lIE+00 7.75E-01 2.24E+00 TM MR 278990023 5/25/2011 Ru-106 1.07E+00 6.04E+00 2.04E+01 TM MR 278990023 5/25/2011 Sb-124 8.99E-01 1.41E+00 4.80E+00 TM MR 278990023 5/25/2011 Sb-125 1.90E+00 1.88E+00 6.07E+00 TM MR 278990023 5/25/2011 Se-75 -2.65E-01 9.18E-01 3.01E+00 TM MR 278990023 5/25/2011 Th-228 5.31IE-01 1.90E+00 4.71E+00 TM MR 278990023 5/25/2011 Zn-65 1.11E+00 1.91E+00 6.27E+00 TM MR 278990023 5/25/2011 Zr-95 -1.6!E-01 1.28E+00 4.23E+00 TM SF 278990024 5/25/2011 Ac-228 -2.03E+00 4.12E+00 1.10E+01 TM SF 278990024 5/25/2011 Ag-108m -6.45E-01 6.71E-01 2.08E+00 TM SF 278990024 5/25/2011 Ag-Il0m -2.01E+00 8.32E-01 2.09E+00 TM SF 278990024 5/25/2011 Ba- 140 1.72E+00 1.18E+00 3.97E+00 TM SF 278990024 5/25/2011 Be-7 -3.87E+00 6.44E+00 2.03E+01 TM SF 278990024 5/25/2011 Ce- 141 -1.04E+00 1.34E+00 4.16E+00 TM SF 278990024 5/25/2011 Ce- 144 -8.07E+00 5.38E+00 1.56E+01 TM SF 278990024 5/25/2011 Co-57 6.92E-01 6.58E-01 2.09E+00 TM SF 278990024 5/25/2011 Co-58 1.89E-01 7.64E-01 2.55E+00 TM SF 278990024 5/25/2011 Co-60 -2.92E+00 1.35E+00 3.04E+00 TM SF 278990024 5/25/2011 Cr-51 3.36E+00 6.57E+00 2.19E+01 TM Si* 278990024 5/25/2011 Cs-134 1.97E-01 8.95E-01 2.99E+00 TM SF 278990024 5/25/2011 Cs-137 1.75E+00 8.79E-01 2.78E+00 TM SF 278990024 5/25/2011 Fe-59 -2.15E+00 1.84E+00 5.50E+00 TM SF 278990024 5/25/2011 1-131 -1.42E-01 2.40E-01 7.78E-01 TM SF 278990024 5/25/2011 1-131 -9.90E-02 1.24E+00 4.07E+00 TM SF 278990024 5/25/2011 K-40 1.61E+03 8.07E+01 2.36E+01 TM SF 278990024 5/25/2011 La-140 1.72E+00 1.18E+00 3.97E+00 TM SF 278990024 5/25/2011 Mn-54 -1.26E+00 7.76E-01 2.23E+00 TM SF 278990024 5/25/2011 Nb-95 1.07E+00 8.04E-01 2.65E+00 TM SF 278990024 5/25/2011 Ru-103 -1 .41E+00 8.31E-01 2.32E+00 TM SF 278990024 5/25/2011 Ru-106 2.38E+/-00 6.17E+00 2.10E+01 TM SF 278990024 5/25/2011 Sb-124 -1.84E+00 1.48E+00 4.26E+00 TM SF 278990024 5/25/2011 Sb-125 1.23E+00 1.92E+00 6.32E+00 TM SF 278990024 5/25/2011 Se-75 -1.66E+00 1.02E+00 3.06E+00 TM SF 278990024 5/25/2011 Th-228 1.64E+00 1.72E+00 5.02E+00 TM SF 278990024 5/25/2011 Zn-65 -4.20E+00 2.19E+00 5.86E+00 D-72

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION . LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 278990024 5/25/2011 Zr-95 3.34E-01 1.41E+00 4.72E+00 U TM LF 278990025 5/25/2011 Ac-228 4.97E+00 3.79E+00 1.24E+01 U TM LF 278990025 5/25/2011 Ag-108m 7.86E-01 7.12E-01 2.34E+00 U TM LF 278990025 5/25/2011 Ag-Il0m -8.78E+00 2.27E+00 2.43E+00 U TM LF 278990025 5/25/2011 Ba- 140 -2.40E+00 1.35E+00 3.5 1E+00 U TM LF 278990025 5/25/2011 Be-7 1.46E+01 7.60E+00 2.35E+01 U TM LF 278990025 5/25/2011 Ce- 141 7.28E-01 1.20E+00 4.01E+00 U TM LF 278990025 5/25/2011 Ce- 144 -4.92E-01 4.17E+00 1.40E+01 U TM LF 278990025 5/25/2011 Co-57 5.01E-01 5.53E-01 1.85E+00 U TM LF 278990025 5/25/2011 Co-58 2.62E-01 8.47E-01 2.83E+00 U TM LF 278990025 5/25/2011 Co-60 - 1. 16E+00 9.93E-01 3.01E+00 U TM LF 278990025 5/25/2011 Cr-51 6.22E+00 6.67E+00 2.25E+01 U TM LF 278990025 5/25/2011 Cs-134 8.72E-01 9.88E-01 3.3 1E+00 U TM LF 278990025 5/25/2011 Cs-137 -4.15E+00 1.79E+00 4.35E+00 U TM LF 278990025 5/25/2011 Fe-59 1.09E+00 2.OOE+00 6.54E+00 U TM LF 278990025 5/25/2011 1-131 1.42E+00 1.27E+00 4.21E+00 U TM LF 278990025 5/25/2011 1-131 -1.21E-01 2.49E-01 8.26E-01 U*

TM LF 278990025 5/25/2011 K-40 1.37E+03 7.08E+01 2.22E+01 TM LF 278990025 5/25/2011 La-140 -2.40E+00 1.35E+00 3.5 1E+00 U TM LF 278990025 5/25/2011 Mn-54 -2.61E-01 8.46E-01 2.76E+00 U TM LF 278990025 5/25/2011 Nb-95 1.29E-01 8.83E-01 2.96E+00 U TM LF 278990025 5/25/2011 Ru-103 -1.59E+00 9.21E-01 2.60E+00 U TM LF 278990025 5/25/2011 Ru-106 -1.58EA-01 8.48E+00 2.28E+01 U TM LF 278990025 5/25/2011 Sb-124 2.15E+00 1.83E+00 6.16E+00 U TM LF 278990025 5/25/2011 Sb-125 -1.24E+00 2.04E+00 6.59E+00 U TM LF 278990025 5/25/2011 Se-75 5.82E-01 9.90E-01 3.18E+00 U TM LF 278990025 5/25/2011 Th-228 4.14E-01 2.07E+00 4.83E+00 U TM LF 278990025 5/25/2011 Zn-65 -2.91E+00 2.3 1E+00 6.78E+00 U TM LF 278990025 5/25/2011 Zr-95 1.56E+00 1.59E+00 5.32E+00 U TM MR 279806023 6/8/2011 Ac-228 -7.70E+00 4.66E+00 1.19E+01 U TM MR 279806023 6/8/2011 Ag-108m 3.40E-01 6.72E-01 2.21E+00 U TM MR 279806023 6/8/2011 Ag- I 10m -1.30E+00 7.70E-01 2.25E+00 U TM MR 279806023 6/8/2011 Ba-140 -1.94E+00 1.22E+00 3.34E+00 U TM MR 279806023 6/8/2011 Be-7 8.70E+00 6.66E+00 2.14E+01 U TM MR 279806023 6/8/2011 Ce-141 -1 .56E+00 1.82E+00 4.47E+00 U TM MR 279806023 6/8/2011 Ce- 144 -7.28E+00 6.36E+00 1.58E+01 U TM MR 279806023 6/8/2011 Co-57 -8.OOE-02 6.57E-01 2.13E+00 U TM MR 279806023 6/8/2011 Co-58 -1.41E+00 8.16E-01, 2.3 1E+00 U TM MR 279806023 6/8/2011 Co-60 -2.63E-01 8.89E-01 2.93E+00 U TM MR 279806023 6/8/2011 Cr-51 9.22E+00 7.37E+00 2.41E+01 U TM MR 279806023 6/8/2011 Cs-134 8.92E-01 9.78E-01 3.27E+00 U TM MR 279806023 6/8/2011 Cs-137 1.81E+00 8.83E-01 2.78E+00 U TM MR 279806023 6/8/2011 Fe-59 3.45E+00 2.09E+00 6.62E+00 U TM MR 279806023 6/8/2011 1-131 -2.15E-01 3.OOE-01 9.61E-01 U TM MR 279806023 6/8/2011 1-131 -8.67E-01 1.32E+00 4.24E+00 U TM MR 279806023 6/8/2011 K-40 1.86E+03 9.97E+01 2.46E+01 TM MR 279806023 6/8/2011 La-140 -1.94E+00 1.22E+00 3.34E+00 U

TM MR 279806023 6/8/2011 Mn-54 -7.82E-01 7.86E-01 2.44E+00 U TM MR 279806023 6/8/2011 Nb-95 -4.84E-02 1.31E+00 2.74E+00 U TM MR 279806023 6/8/2011 Ru-I103 -2.87E+00 1.1OE+00 2.5 1E+00 U TM MR 279806023 6/8/2011 Ru-106' 1.10E+01 7.19E+00 2.37E+01 U D-73

Donald C. Cook Nuclear Plant Annual Radiological Environmental, Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN " DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 279806023 6/8/2011 Sb-124 -2.91E-01 1.61E+00 5.23E+00 TM MR 279806023 6/8/2011 Sb-125 8.65E-01 1.95E+00 6.44E+00 TM MR 279806023 6/8/2011 Se-75 -1.36E+00 1.05E+00 3.26E+00 TM MR 279806023 6/8/2011 Th-228 3.24E-01 2.46E+00 5.45E+00 TM MR 279806023 6/8/2011 Zn-65 -1.28E-01 2.15E+00 6.93E+00 TM MR 279806023 6/8/2011 Zr-95 2.38E+00 1.55E+00 5.05E+00 TM SF 279806024 6/8/2011 Ac-228 -9.42E+00 5.13E+00 1.15E+01 TM SF 279806024 6/8/2011 Ag-108m 5.53E-01 7.01E-01 2.28E+00 TM SF 279806024 6/8/2011 Ag-Il0m -1.21E-01 7.48E-01 2.48E+00 TM SF 279806024 6/8/2011 Ba- 140 -1.64E+00 1.20E+00 3.53E+00 TM SF 279806024 6/8/2011 Be-7 5.42E+00 6.84E+00 2.21E+01 TM SF 279806024 6/8/2011 Ce- 141 2.78E+00 1.54E+00 4.24E+00 TM SF 279806024 6/8/2011 Ce- 144 2.81E+00 4.85E+00 1.59E+01 TM SF .279806024 6/8/2011 Co-57 -3.57E-01 6.37E-01 2.08E+00 TM SF 279806024 6/8/2011 Co-58 -7.85E-01 8.63E-01 2.68E+00 TM SF 279806024 6/8/2011 Co-60 -7.29E-01 9.63E-01 3.01E+00 TM SF 279806024 6/8/2011 Cr-51 1.36E+401 7.45E+00 2.33E+01 TM SF 279806024 6/8/2011 Cs-134 3.51E-01 9.84E-01 3.24E+00 TM SF 279806024 6/8/2011 Cs-137 2.42E-01 8.17E-01 2.73E+.00 TM SF 279806024 6/8/2011 Fe-59 -3.41E+00 2.OOE+00 5.75E+00 TM SF 279806024 6/8/2011 1-131 2.86E-02 2.68E-01 8.83E-01 TM SF 279806024 6/8/2011 1-131 -1.83E-01 1.27E+00 4.18E+00 TM SF 279806024 6/8/2011 K-40 1.46E+03 7.93E+01 2.48E+01 TM SF 279806024 6/8/2011 La-140 -1.64E+00 1.20E+00 3.53E+00 U TM SF 279806024 6/8/2011 Mn-54 -4.41E-01 8.15E-01 2.59E+00 U TM SF 279806024 6/8/2011 Nb-95 2.15E-01 1.23E+00 2.82E+00 U TM SF 279806024 6/8/2011 Ru-103 -6.74E-01 8.OOE-01 2.46E+00 U TM SF 279806024 6/8/2011 Ru-106 3.06E+00 6.65E+00 2.24E+01 U TM SF 279806024 6/8/2011 Sb-124 6.OOE-01 1.51E+00 5.11E+00 U TM SF 279806024 6/8/2011 Sb-125 1.66E+00 2.08E+00 6.79E+00 U TM SF 279806024 6/8/2011 Se-75 -1.I1E+00 9.87E-01 3.15E+00 U TM SF 279806024 6/8/2011 Th-228 1.70E+00 2.38E+00 4.91E+00 U TM SF 279806024 6/8/2011 Zn-65 -4.82E+00 2.38E+00 6.52E+00 U TM SF 279806024 6/8/2011 Zr-95 -4.57E-01 1.46E+00 4.73E+00 U TM LF 279806025 6/8/2011 Ac-228 2.18E+00 4.45E+00 1.14E+01 U.

TM LF 279806025 6/8/2011 Ag-108m -1.52E+00 7.31E-01 1.94E+00 U TM LF 279806025 6/8/2011 Ag-110m -4.08E-01 7.32E-01 2.06E+00 U TM LF 279806025 6/8/2011 Ba- 140 -3.91E-02 1.01E+00 3.30E+00 U TM LF 279806025 6/8/2011 Be-7 -5.49E+00 6.57E+00 2.04E+01 U TM LF 279806025 6/8/2011 Ce-141 1.37E+00 1.30E+00 4.13E+00 U TM LF 279806025 6/8/2011 Ce- 144 -3.04E+00 5.OOE+00 1.59E+01 U TM LF 279806025 6/8/2011 Co-57 1.14E+00 6.79E-01 2.09E+00 U TM LF 279806025 6/8/2011 'Co-58 -8.16E-01 7.21E-01 2.19E+00 U TM LF 279806025 6/8/2011 Co-60 -1.46E+00 1.32E+00 3.06E+00 U TM LF 279806025 6/8/2011 Cr-51 6.23E+00 7.01E+00 2.32E+01 U TM LF 279806025 6/8/2011 Cs-134 -9.23E-01 1.02E+00 2.84E+00 U TM LF 279806025 6/8/2011 Cs-137 2.71E+00 1.37E+00 2.36E+00 U' M TM LF 279806025 6/8/2011 Fe-59 9.97E-01 1.91E+00 6.21E+00 U TM LF 279806025 6/8/2011 1-131 -2.52E+00 1.35E+00' 3.81E+00 U TM LF 279806025 6/8/2011 1-131 4.29E-03 2.87E-01 9.59E-01 U TM LF 279806025 6/8/2011 K-40 1.44E+03 7.54E+01 2.35E+01 D-74

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 279806025 6/8/2011 La-140. -3.91E-02 1.01E+00 3.30E+00 TM LF 279806025 6/8/2011 Mn-54 -6.54E-01 7.36E-01 2.29E+00 TM LF 279806025 6/8/2011 Nb-95 9.51E-01 7.84E-01 2.59E+00 TM LF 279806025 6/8/2011 Ru-103 -1.61E+00 8.47E-01 2.28E+00 TM LF 279806025 6/8/2011 Ru-106 -3.96E+00 6.24E+00 2.03E+01 TlM LF 279806025 6/8/2011 Sb-124 9.99E-02 1.63E+00 5.33E+00 TM LF 279806025 6/8/2011 Sb-125 -5.27E-02 1.91E+00 6.22E+00 TM LF 279806025 6/8/2011 Se-75 -1.66E-01 9.77E-01 3.27E+00 TM LF 279806025 6/8/2011 Th-228 3.71E+00 2.26E+00 5.17E+00 TM LF 279806025 6/8/2011 Zn-65 -I .35E+00 2.OOE+00 6.21 E+00 TM LF 279806025 6/8/2011 Zr-95 -5.43E-01 1.42E+00 4.63E+00 TM MR 280647023 6/22/2011 Ac-228 5.15E+00 5.76E+00 1.19E+01 TM MR 280647023 6/22/2011 Ag-108m 2.27E-01 7.13E-01 2.35E+00 TM MR 280647023 6/22/2011 Ag-110m -8.05E-01 7.81E-01 2.48E+00 TM MR 280647023 6/22/2011 Ba-140 -8.61E-01 1.11E+00 3.41E+00 TM MR 280647023 6/22/2011 Be-7 -1.67E+01 9.39E+00 2.12E+01 TM MR 280647023 6/22/2011 Ce-I141 -1.75E+00 1.74E+00 4.29E+00 TM MR 280647023 6/22/2011 Ce-I144 -6.22E+00 5.56E+00 1.62E+01 TM MR 280647023 6/22/2011 Co-57 9.73E-01 6.99E-01 2.20E+00 TM MR 280647023 6/22/2011 Co-58 2.79E+00 1.02E+00 2.90E+00 TM MR 280647023 6/22/2011 Co-60 4.65E-01 8.96E-01 3.03E+00 TM MR 280647023 6/22/2011 Cr-51 4.68E+00 7.5 1E+00 2.50E+01 TM MR 280647023 6/22/2011 Cs-134 6.81E-02 9.72E-01 3.23E+00 TM MR 280647023 6/22/2011 Cs-137 7.67E-01 8.35E-01 2.82E+00 TM MR 280647023 6/22/2011 Fe-59 -3.11E+00 2.23E+00 6.49E+00 TM MR 280647023 6/22/2011 1-131 5.90E-01 2.60E-0 1 7.89E-01 TM MR 280647023 6/22/2011 1-131 7.58E-02 1.24E+00 4.12E+00 TM MR 280647023 6/22/2011 K-40 1.91E+03 1.02E+02 2.08E+01 TM MR 280647023 6/22/2011 La-140 -8.61E-01 1.11E+00 3.41E+00 TM MR 280647023 6/22/2011 Mn-54 -9.80E-01 1.04E+00 2.74E+00 TM MR 280647023 6/22/2011 Nb-95 5.06E-01 1.04E+00 2.80E+00 TM MR 280647023 6/22/2011 Ru-103 -8.48E-01 8.17E-01 2.48E+00 TM MR 280647023 6/22/2011 Ru-106 1.47E+00 6.56E+00 2.23E+01 TM MR 280647023 6/22/2011 Sb-124 -1.95E+00 1.81E+00 5.37E+00 TM MR 280647023 6/22/2011 Sb-125 -8.32E-02 2.02E+00 6.61E+00 TM MR 280647023 6/22/2011 Se-75 5.93E-01 9.88E-01 3.33E+00 TM MR 280647023 6/22/2011 Th-228 -4.24E+00 2.36E+00 5.12E+00 TM MR 280647023 6/22/2011 Zn-65 -4.80E+00 2.55E+00 6.49E+00 TM MR 280647023 6/22/2011 Zr-95 3.45E-01 1.32E+00 4.43E+00 TM SF 280647024 6/22/2011 Ac-228 5.97E+00 6.43E+00 1.24E+01 TM SF 280647024 6/22/2011 Ag-108m -2.OOE-01 6.83E-01 2.20E+00 TM SF 280647024 6/22/2011 Ag-I 10m -1.12E+00 8.05E-01 2.43E+00 TM SF 280647024 6/22/2011 Ba- 140 -2.72E+00 1.78E+00 3.99E+00 TM SF 280647024 6/22/2011 Be-7 -9.11E+00 9.11E+00 2.15E+01 TM SF 280647024 6/22/2011 Ce-141 -7.58E-01 1.28E+00 4.11E+00 TM SF 280647024 6/22/2011 Ce- 144 -2.13E+00 4.81E+00 1.57E+01 TM SF 280647024 6/22/2011 Co-57 -5.01E-02 6.16E-01 2.04E+00 TM SF 280647024 6/22/2011 Co-58 -2.11 E-01 8.39E-01 2.7 1E+00 TM SF 280647024 6/22/2011 Co-60 2.55E+00 1.09E+00 3.26E+00 TM SF 280647024 6/22/2011 Cr-51 -3.97E-01 6.68E+00 2.22E+01 SF 280647024 6/22/2011 Cs-134 2.18E+00 1.09E+00 3.36E+00 D-75

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 280647024 6/22/2011 Cs-137 3.01E-01 8.59E-01 2.87E+00 U TM SF 280647024 6/22/2011 Fe-59 6.90E-01 1.88E+00 6.29E+00 U TM SF 280647024 6/22/2011 1-131 -1.06E-01 1.76E-01 5.76E-01 U TM SF 280647024 6/22/2011 1-131 -7.07E-01 1.29E+00 4.19E+00 U TM SF 280647024 6/22/2011 K-40 1.47E+03 7.89E+01 2.40E+01 TM SF 280647024 6/22/2011 La-140 -2.72E+00 1.78E+00 3.99E+00 U TM SF 280647024 6/22/2011 Mn-54 2.07E+00 9.63E-01 2.89E+00 U TM SF 280647024 6/22/2011 Nb-95 1.03E+00 8.64E-01 2.81 E+00 U TM SF 280647024 6/22/2011 Ru-103 8.48E-03 8.17E-01 2.63E+00 U TM SF 280647024 6/22/2011 Ru-106 -5.77E+00 7.11E+00 2.28E+01 U TM SF 280647024 6/22/2011 Sb-124 2.15E+00 1.69E+00 5.71E+00 U TM SF 280647024 6/22/2011 Sb-125 -2.44E-01 2.04E+00 6.63E+00 U TM SF 280647024 6/22/2011 Se-75 -1.48E+00 1.01E+00 3.14E+00 U TM SF 280647024 6/22/2011 Th-228 7.29E-01 2.05E+00 4.77E+00 U TM SF 280647024 6/22/2011 Zn-65 -2.11 E+00 2.11E+00 6.62E+00 U TM SF 280647024 6/22/2011 Zr-95 -8.75E-01 1.51E+00 4.82E+00 U TM LF 280647025 6/22/2011 Ac-228 3.05E+00 4.31E+00 1.20E+01 U TM LF 280647025 6/22/2011 Ag-108m 6.68E-01 7.13E-01 2.30E+00 U TM LF 280647025 6/22/2011 Ag-Il0m -1.45E+00 8.12E-01 2.30E+00 U TM 6/22/2011 5.31lE-01 LF 280647025 Ba- 140 1.21E+00 4.12E+00 U TM LF 280647025 6/22/2011 Be-7 3.12E+00 6.99E+00 2.25E+01 U TM LF 280647025 6/22/2011 Ce- 141 -7.74E-02 1.47E+00 4.47E+00 U TM LF 280647025 6/22/2011 Ce- 144 1.09E+01 5.97E+00 1.78E+01 U TM LF 280647025 6/22/2011 Co-57 -5.28E-01 6.86E-01 2.16E+00 U TM LF 280647025 6/22/2011 Co-58 6.48E-01 8.16E-01 2.68E+00 U TM LF 280647025 6/22/2011 Co-60 7.63E-02 8.96E-01 2.94E+00 U TM LF 280647025 6/22/2011 Cr-51 -1.49E+01 7.97E+00 2.25E+01 U TM LF 280647025 6/22/2011 Cs-134 2.12E+00 1.1OE+00 3.42E+00 U TM LF 280647025 6/22/2011 Cs-137 6.25E-01 8.37E-01 2.78E+00 U TM LF 280647025 6/22/2011 Fe-59 -1.40E+00 1.98E+00 6.35E+00 U TM LF 280647025 6/22/2011 1-131 -4.67E-01 1.28E+00 4.13E+00 U TM LF 280647025 6/22/2011 1-131 3.74E-01 3.35E-01 1.1OE+00 U DL TM LF 280647025 6/22/2011 K-40 1.45E+03 7.70E+01 2.37E+01 TM LF 280647025 6/22/2011 La-140 5.3 1E-01 1.21E+00 4.12E+00 U TM LF 280647025 6/22/2011 Mn-54 2.58E-02 8.44E-01 2.74E+00 U TM LF 280647025 6/22/2011 Nb-95 1.59E+00 8.76E-01 2.76E+00 U TM LF 280647025 6/22/2011 Ru- 103 -1.34E+00 8.51E-01 2.55E+00 U TM LF 280647025 6/22/2011 Ru-106 -4.80E+00 7.05E+00 2.27E+01 U TM LF 280647025 6/22/2011 Sb-124 6.03E-02 1.73E+00 5.78E+00 U TM LF 280647025 6/22/2011 Sb-125 -6.15E-01 2.10E+00 6.72E+00 U TM LF 280647025 6/22/2011 Se-75 -1.02E+00 1:09E+00 3.48E+00 U TM LF 280647025 6/22/2011 Th-228 -9.90E-01 2.05E+00 5.3 11E+00 U TM LF 280647025 6/22/2011 Zn-65 -1.97E+00 2.09E+00 6.56E+00 U TM LF 280647025 6/22/2011 Zr-95 1.12E+00 1.48E+00 4.87E+00 U TM MR 281623023 7/6/2011 Ac-228 -1.13E+01 5.84E+00 1.48E+01 U TM MR 281623023 7/6/2011 Ag-108m -8.58E-02 1.02E+00 3.33E+00 U TM MR 281623023 7/6/2011 Ag- llI0m -1.50E-01 1.02E+00 3.40E+00 U TM MR 281623023 7/6/2011 Ba-140 7.92E-01 1.70E+00 5.77E+00 U TM 7/6/2011 Be-7 -1 .27E+00 MR 281623023 1.14E+01 3.29E+01 U TM MR 281623023 7/6/2011 Ce- 141 -1.63E+00 2.48E+00 7.06E+00 U TM MR 281623023 7/6/2011 Ce- 144 -2.15E+00 7.65E+00 2.47E+01 U D-76

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 281623023 7/6/2011 Co-57 7.25E-01 1.18E+00 3.62E+00 U TM MR 281623023 7/6/2011 Co-58 1.80E+00 1.21E+00 4.03E+00 U TM MR 281623023 7/6/2011 Co-60 -3.48E-01 1.25E+00 4.10E+00 U TM MR 281623023 7/6/2011 Cr-51 -1.48E+01 1.12E+01 3.39E+01 U TM MR 281623023 7/6/2011 Cs-134 -1.32E+00 1.45E+00 4.49E+00 U TM MR 281623023 7/6/2011 Cs-137 -1.34E+00 1.14E+00 3.49E+00 U TM MR 281623023 7/6/2011 Fe-59 -2.16E+00 2.94E+00 9.03E+00 U TM MR 281623023 7/6/2011 1-131 -1.16E-01 2.24E-01 7.26E-01 U TM MR 281623023 7/6/2011 1-131 -3.11E+00 2.27E+00 6.76E+00 U TM MR 281623023 7/6/2011 K-40 1.85E+03 1.07E+02 3.44E+01 TM MR 281623023 7/6/2011 La-140 7.92E-01 1.70E+00 5.77E+00 U TM MR 281623023 7/6/2011 Mn-54 1.07E-01 1.17E+00 3.89E+00 U TM MR 281623023 7/6/2011 Nb-95 1.08E-01 1.11E+00 3.72E+00 U TM MR 281623023 7/6/2011 Ru- 103 -1.71E+00 1.30E+00 3.79E+00 U TM MR 281623023 7/6/2011 Ru- 106 -2.63E+00 9.32E+00 3.10E+01 U TM MR 281623023 7/6/2011 Sb-124 -1.95E+00 2.02E+00 5.71E+00 U TM MR 281623023 7/6/2011 Sb-125 -8.21E-01 3.02E+00 9.78E+00 U TM MR 281623023 7/6/2011 Se-75 -1.14E+00 1.53E+00 4.98E+00 U TM MR 281623023 7/6/2011 Th-228 -3.97E+00 2.64E+00 7.38E+00 U TM MR 281623023 7/6/2011 Zn-65 1.60E+00 3.08E+00 1.01E+01 U TM MR 281623023 7/6/2011 Zr-95 1.47E+00 2.16E+00 7.30E+00 U TM SF 281623024 7/6/2011 Ac-228 7.22E+00 5.27E+00 1.76E+01 U TM SF 281623024 7/6/2011 Ag-108m -1.23E+00 1.04E+00 3.14E+00 U TM SF 281623024 7/6/2011 Ag-il0m -4.51E-03 1.06E+00 3.44E+00 U TM SF 281623024 7/6/2011 Ba-140 -2.11E-02 1.61E+00 5.21E+00 U TM SF 281623024 7/6/2011 Be-7 -5.45E+00 1.02E+01 3.27E+01 U TM SF 281623024 7/6/2011 Ce- 141 -2.03E+00 2.20E+00 6.78E+00 U TM SF 281623024 7/6/2011 Ce-144 -6.91 E+00 8.10E+00 2.51E+01 U TM SF 281623024 7/6/2011 Co-57 7.45E-01 1.03E+00 3.34E+00 U TM SF 281623024 7/6/2011 Co-58 -2.76E-02 1.25E+00 4.19E+00 U TM SF 281623024 7/6/2011 Co-60 -2.07E+00 1.56E+00 4.48E+00 U TM SF 281623024 7/6/2011 Cr-51 -8.59E+00 1.14E+01 3.67E+01 U TM SF 281623024 7/6/2011 Cs-134 -2.75E-01 1.33E+00 4.44E+00 U TM SF 281623024 7/6/2011 Cs-137 1.25E+00 1.26E+00 4.14E+00 U TM SF 281623024 7/6/2011 Fe-59 1.84E+00 3.09E+00 1.04E+01 U TM SF 281623024 7/6/2011 1-131 1.27E+00 2.13E+00 7.14E+00 U TM SF 281623024 7/6/2011 1-131 -4.76E-01 6.82E-01 1.14E+00 U DL TM SF 281623024 7/6/2011 K-40 1.57E+03 9.17E+01 3.25E+01 TM SF 281623024 7/6/2011 La-140 -2.11E-02 1.61E+00 5.21E+00 U TM SF 281623024 7/6/2011 Mn-54 -5.42E-01 1.13E+00 3.69E+00 U TM SF 281623024 7/6/2011 Nb-95 2.97E-01 1.15E+00 3.74E+00 U TM SF 281623024 7/6/2011 Ru-103 -2.85E+00 1.36E+00 3.48E+00 U TM SF 281623024 7/6/2011 Ru-106 1.03E+01 1.11E+01 3.65E+01 U TM SF 281623024 7/6/2011 Sb-124 -1.15E-01 3.1OE+00 9.48E+00 U TM SF 281623024 7/6/2011 Sb-125 1.75E+00 3.15E+00 1.05E+01 U TM SF 281623024 7/6/2011 Se-75 1.74E+00 1.50E+00 4.99E+00 U TM SF 281623024 7/6/2011 Th-228 3.39E+00 3.05E+00 7.91E+00 U TM SF 281623024 7/6/2011 Zn-65 -3.01E+00 3.19E+00 9.89E+00 U TM SF 281623024 7/6/2011 Zr-95 1.43E+00 2.21E+00 7.25E+00 U TM LF 281623025 .7/6/2011 Ac-228 3.01E+00 5.07E+00 1.55E+01 U TM LF 281623025 7/6/2011 Ag-108m 4.11E-01 9.59E-01 3.25E+00 U D-77

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 281623025 7/6/2011 Ag-Il0m -9.30E-01 1.1OE+00 3.42E+00 U TM LF 281623025 7/6/2011 Ba- 140 -6.19E-01 1.70E+00 5.38E+00 U TM LF 281623025 7/6/2011 Be-7 -7.87E+00 9.44E+00 3.OOE+01 U TM LF 281623025 7/6/2011 Ce- 141 -1.81E-01 1.83E+00 6.05E+00 U TM LF 281623025 7/6/2011 Ce-144 4.17E+00 6.77E+00 2.25E+01 U TM LF 281623025 7/6/2011 Co-57 4.91E-01 8.69E-01 2.90E+00 U TM LF 281623025 7/6/2011 Co-58 3.91E-01 1.15E+00 3.79E+00 U TM LF 281623025 7/6/2011 Co-60 -1.37E-01 1.33E+00 4.39E+00 U TM LF 281623025 7/6/2011 Cr-51 4.04E+00 9.39E+00 3.05E+01 U TM LF 281623025 7/6/2011 Cs-134 1.24E+00 1.28E+00 4.28E+00 U TM LF 281623025 7/6/2011 Cs-137 9.70E-01 1.19E+00 3.97E+00 U TM LF 281623025 7/6/2011 Fe-59 4.45E+00 2.97E+00 9.93E+00 U TM LF 281623025 7/6/2011 1-131 -6.39E-02 2.42E-01 8.02E-01 U TM LF 281623025 7/6/2011 1-131 1.41E+00 2.03E+00 6.58E+00 U TM LF 281623025 7/6/2011 K-40 1.49E+03 8.18E+01 2.99E+01 TM LF 281623025 7/6/2011 La-140 -6.19E-01 1.70E+00 5.38E+00 U TM LF 281623025 7/6/2011 Mn-54 -1.61E+00 1.08E+00 3.01E+00 U TM LF 281623025 7/6/2011 Nb-95 -4.23E-01 1.04E+00 3.33E+00 U TM LF 281623025 7/6/2011 Ru-103 -3.44E-01 1.23E+00 3.65E+00 U TM LF 281623025 7/6/2011 Ru-106 -1.16E+01 1.01E+01 3.05E+01 U TM LF 281623025 7/6/2011 Sb-124 4.83E-01 2.50E+00 8.29E+00 U TM LF 281623025 7/6/2011 Sb-125 1.97E+00 2.84E+00 9.64E+00 U TM LF 281623025 7/6/2011 Se-75 -1.75E+00 1.56E+00 4.72E+00 U TM LF 281623025 7/6/2011 Th-228 7.33E-01 2.32E+00 6.92E+00 U TM LF 281623025 7/6/2011 Zn-65 -7.80E-01 2.83E+00 9.37E+00 U TM LF 281623025 7/6/2011 Zr-95 5.26E-01 1.94E+00 6.41E+00 U TM MR 282602023 7/20/2011 Ac-228 8.65E+00 3.59E+00 1.03E+01 U TM MR 282602023 7/20/2011 Ag-108m -1.79E-01 5.97E-01 1.99E+00 U TM MR 282602023 7/20/2011 Ag-ll0m -4.23E-01 6.95E-01 2.23E+00 U TM MR 282602023 7/20/2011 Ba-140 -2.48E-01 9.49E-01 3.07E+00 U TM MR 282602023 7/20/2011 Be-7 8.86E-01 5.67E+00 1.90E+01 U.

TM MR 282602023 7/20/2011 Ce- 141 2.OOE+00 1.29E+00 3.79E+00 U TM MR 282602023 7/20/2011 Ce-144 -4.11 E+00 4.44E+00 1.42E+01 U TM MR 282602023 7/20/2011 Co-57 1.25E-01 5.79E-01 1.93E+00 U TM MR 282602023 7/20/2011 Co-58 -1.56E+00 9.53E-01 2.53E+00 U TM MR 282602023 7/20/2011 Co-60 -7.32E-01 8.58E-01 2.71E+00 U, TM MR 282602023 7/20/2011 Cr-51 3.28E+00 6.50E+00 2.10E+01 U TM MR 282602023 7/20/2011 Cs-134 4.54E-01 9.14E-01 3.01E+00 U TM MR 282602023 7/20/2011 Cs-137 9.55E-01 9.56E-01 2.75E+00 U TM MR 282602023 7/20/2011 Fe-59 -1.42E+00 1.76E+00 5.68E+00 U TM MR 282602023 7/20/2011 1-131 -1.45E+00 1.11E+00 3.26E+00 U TM MR 282602023 7/20/2011 1-131 -1.46E-01 1.77E-01 5.69E-01 U TM MR 282602023 7/20/2011 K-40 2.01E+03 9.51E+01 2.22E+01 TM MR 282602023 7/20/2011 La-140 -2.48E-01 9.49E-01 3.07E+00 U TM MR 282602023 7/20/2011 Mn-54 -5.06E-01 7.45E-01 2.35E+00 U TM MR 282602023 7/20/2011 Nb-95 -5.68E-01 7.38E-01 2.32E+00 U TM MR 282602023 7/20/2011 Ru-103 -3.73E-01 7.23E-01 2.37E+00 U TM MR 282602023 7/20/2011 Ru-106 -5.64E-01 6.52E+00 2.15E+01 U TM MR 282602023 7/20/2011 Sb-124 -1.24E+00 1.55E+00 4.75E+00 U TM MR 282602023 7/20/2011 Sb-125 -1.17E+00 1.83E+00 6.01E+00 U TM MR 282602023 7/20/2011 Se-75 1.21E+00 9.93E-01 .3.15E+00 U D-78

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 282602023 7/20/2011 Th-228 -1.82E+00 1.84E+00 4.42E+00 TM MR 282602023 7/20/2011 Zn-65 3.68E+00 2.05E+00 6.53E+00 TM MR ,282602023 7/20/2011 Zr-95 -6.70E-01 1.32E+00 4.23E+00 TM .SF 282602024 7/20/2011 Ac-228 -2.78E+00 3.76E+00 1.02E+01 TM SF 282602024 7/20/2011 Ag-108m 1.81E-01 6.40E-01 2.12E+00 TM SF 282602024 7/20/2011 Ag-I l0m -2.04E-02 7.OOE-01 2.27E+00 TM SF 282602024 7/20/2011 Ba-140 1.52E-01 1.05E+00 3.43E+00 TM SF 282602024 7/20/2011 Be-7 -5.72E+00 6.32E+00 1.99E+01 TM SF 282602024 7/20/2011 Ce- 141 7.45E-01 1.38E+00 4.12E+00 TM SF 282602024 7/20/2011 Ce-144 -1.45E-01 4.95E-+00 1.54E+01 TM SF 282602024 7/20/20 11 Co-57 4.82E-01 6.20E-01 2.OOE+00 TM SF 282602024 7/20/2011 Co-58 -2.23E-01 7.43E-01 2.47E+00 TM SF 282602024 7/20/2011 Co-60 1.85E+00 9.46E-01 2.98E+00 TM SF 282602024 7/20/2011 Cr-51 2.50E+00 6.42E+00 2.15E+01 TM SF 282602024 7/20/2011 Cs-134 1.58E-01 8.5 1E-01 2.88E+00 TM SF 282602024 7/20/2011 Cs-137 -1.00E+00 8.24E-01 2.47E+00 TM SF 282602024 7/20/2011 Fe-59 -1.09E+00 1.75E+00 5.62E+00 TM SF 282602024 7/20/2011 1-131 -1.21E-01 2.08E-01 6.72E-01 TM SF 282602024 7/20/2011 1-131 -9.10E-01 1.12E+00 3.57E+00 TM SF 282602024 7/20/2011 K-40 1.48E+03 7.64E+01 2.42E+01 TM SF 282602024 7/20/2011 La-140 1.52E-01 1.05E+00 3.43E+00 TM SF 282602024 7/20/2011 Mn-54 3.29E-01 7.20E-01 2.43E+00 TM SF 282602024 7/20/2011 Nb-95 1.08E+00 7.93E-01 2.53E+00 TM SF 282602024 7/20/2011 Ru-103 -1.67E+00 8.42E-01 2.30E+00 TM SF 282602024 7/20/2011 - Ru-106 -1.00E+01 6.85E+00 2.OOE+01 TM SF 282602024 7/20/2011 Sb-124 -1.06E+00 1.57E+00 4.82E+00 TM SF 282602024 7/20/2011 Sb-125 -2.71 E+00 2.02E+00 6.14E+00 TM SF 282602024 7/20/2011 Se-75 7.64E-01 9.74E-01 3.25E+00 TM SF 282602024 7/20/2011 Th-228 -7.79E-01 1.90E+00 4.83E+00 TM SF 282602024 7/20/2011 Zn-65 -1.88E+00 1.91E+00 6.OOE+00 TM SF 282602024 7/20/2011 Zr-95 -5.37E-02 1.35E+00 4.35E+00 TM LF 282602025 7/20/2011 Ac-228 3.42E+00 4.15E+00 9.93E+00 TM LF 282602025 7/20/2011 Ag-108m -7.89E-02 5.24E-01 1.74E+00 TM LF 282602025 7/20/2011 Ag-Il0m -2.81E-01 6.05E-01 1.91E+00 TM LF 282602025 7/20/2011 Ba- 140 -1.35E+00 9.50E-01 2.72E+00 TM LF 282602025 7/20/2011 Be-7 4.96E+00 5.40E+00 1.79E+01 TM LF 282602025 7/20/2011 Ce-I141 -1.49E+00 1.44E+00 3.37E+00 TM LF 282602025 7/20/2011 Ce-I144 -2.37E+00 3.99E+00 1.31E+01 TM LF 282602025 7/20/2011 Co-57 3.68E-01 5.30E-01 1.78E+00 TM LF 282602025 7/20/2011 Co-58 "5.14E-01 6.13E-01 2.07E+00 TM LF 282602025 7/20/2011 Co-60 -6.25E-01 8.03E-01 2.46E+00 TM LF 282602025 7/20/2011 Cr-51 9.63E-01 5.45E+00 1.86E+01 TM LF 282602025 7/20/2011 Cs-134 8.15E-01 7.62E-01 2.57E+00 TM LF 282602025 7/20/2011 Cs-137 6.16E-01 7.OOE-01 2.27E+00 TM LF 282602025 7/20/2011 Fe-59 -2.09E+00 1.62E+00 4.84E+00 TM LF 282602025 7/20/2011 1-131 9.87E-01 9.29E-01 3.11E+00 TM LF 282602025 7/20/2011 1-131 -2.37E-01 2.64E-01 8.57E-01 TM LF 282602025 7/20/2011 K-40 1.48E+03 7.59E+01 2.02E+01 TM LF 282602025 7/20/2011 La-140 -1.35E+00 9.48E-01 2.72E+00 TM LF 282602025 7/20/2011 Mn-54 4.49E-01 6.55E-01 2.21E+00 TM LF 282602025 7/20/2011 Nb-95 -2.84E-01 6.20E-01 2.05E+00 D-79

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 282602025 7/20/2011 Ru-103 -1.82E+00 7.93E-01 2.03E+00 U TM LF 282602025 7/20/2011 Ru-106 1.57E+00 5.54E+00 1.81E+01 U TM LF 282602025 7/20/2011 Sb-124 -1.24E+00 1.38E+00 4.22E+00 U TM LF 282602025 7/20/2011 Sb-125 -4.67E+00 2.37E+00 5.17E+00 U TM LF 282602025 7/20/2011 Se-75 1.77E-01 8.33E-01 2.68E+00 U TM LF 282602025 7/20/2011 Th-228 1.00E+00 1.95E+00 4.39E+00 U TM LF 282602025 7/20/2011 Zn-65 -2.52E+00 1.96E+00 5.08E+00 U TM LF 282602025 7/20/2011 Zr-95 1.13E+00 1.08E+00 3.64E+00 U TM MR 283532023 8/3/2011 Ac-228 -2.92E+00 3.95E+00 9.61E+00 U TM MR 283532023 8/3/2011 Ag-108m -3.41E-01 6.52E-01 2.13E+00 U TM MR 283532023 8/3/2011 Ag-Il0m -1.87E+00 8.50E-01 2.23E+00 U TM MR 283532023 8/3/2011 Ba- 140 6.55E-01 8.87E-01 2.95E+00 U TM MR 283532023 8/3/2011 Be-7 -2.77E+00 6.29E+00 2.06E+01 U TM MR 283532023 8/3/2011 Ce- 141 -3.25E-01 1.44E+00 4.56E+00 U TM MR 283532023 8/3/2011 Ce-I144 -4.09E+00 5.46E+00 1.75E+01 U TM MR 283532023 8/3/2011 Co-57 -1.94E-01 6.95E-01 2.29E+00 U TM MR 283532023 8/3/2011 Co-58 -5.30E-01 7.81E-01 2.44E+00 U TM MR 283532023 8/3/2011 Co-60 1.90E-01 1.17E+00 2.93E+00 U TM MR 283532023 8/3/2011 Cr-51 -1.15E+00 6.65E+00 2.24E+01 U TM MR 283532023 8/3/2011 Cs-134 7.64E-01 9.52E-01 3.09E+00 U TM MR 283532023 8/3/2011 Cs-137 1.77E+00 8.84E-01 2.68E+00 U TM MR 283532023 8/3/2011 Fe-59 4.93E-01 1.75E+00 5.83E+00 U TM MR 283532023 8/3/2011 1-131 -9.59E-02 2.89E-01 9.44E-01 U TM MR 283532023 8/3/2011 1-131 5.14E-01 1.29E+00 4.35E+00 U TM MR 283532023 8/3/2011 K-40 2.03E+03 1.01E+02 2.55E+01 TM MR 283532023 8/3/2011 La-140 6.55E-01 8.86E-01 2.95E+00 U TM MR 283532023 8/3/2011 Mn-54 6.29E-01 9.48E-01 2.40E+00 U TM MR 283532023 8/3/2011 Nb-95 -2.03E-01 7.22E-01 2.32E+00 U TM MR 283532023 8/3/2011 Ru-103 3.35E-02 7.89E-01 2.61E+00 U TM MR 283532023 8/3/2011 Ru-106 -2.57E+00 6.64E+00 2.15E+01 U TM MR 283532023 8/3/2011 Sb-124 -1.84E+00 1.27E+00 3.46E+00 U TM MR 283532023 8/3/2011 Sb-125 4.49E-01 2.27E+00 6.42E+00 U TM MR 283532023 8/3/2011 Se-75 -1.06E+00 1.08E+00 3.32E+00 U TM MR 283532023 8/3/2011 Th-228 -2.37E+00 2.06E+00 5.27E+00 U TM MR 283532023 8/3/2011 Zn-65 -8.28E-02 1.80E+00 5.96E+00 U TM MR 283532023 8/3/2011 Zr-95 1.11 E+00 1.34E+00 4.36E+00 U TM SF 283532024 8/3/2011 Ac-228 1.67E+00 3.15E+00 8.92E+00 U TM SF 283532024 8/3/2011 Ag-108m -5.33E-01 5.28E-01 1.65E+00 U TM SF 283532024 8/3/2011 Ag- li0m -3.58E-01 6.OOE-01 1.88E+00 U TM SF 283532024 8/3/2011 Ba-140 -1. 14E+00 9.02E-01 2.68E+00 U TM SF 283532024 8/3/2011 Be-7 2.91E+00 5.09E+00 1.68E+01 U TM SF 283532024 8/3/2011 Ce- 141 -3.14E-01 1.08E+00 3.47E+00 U TM SF 283532024 8/3/2011 Ce- 144 3.60E+00 4.22E+00 1.36E+01 U TM SF 283532024 8/3/2011 Co-57 1.06E+00 5.93E-01 1.81E+00 U TM SF 283532024 8/3/2011 Co-58 1.45E-02 6.22E-01 2.09E+00 U TM SF 283532024 8/3/2011 Co-60 1.29E+00 7.83E-01 2.50E+00 U TM SF 283532024 8/3/2011 Cr-51 -1.61E+01 7.49E+00 1.73E+01 U TM SF 283532024 8/3/2011 Cs-134 1.66E+00 8.33E-01 2.64E+00 U TM SF 283532024 8/3/2011 Cs-137 1.1 OE-01 6.18E-01 2.OOE+00 U TM SF 283532024 8/3/2011 Fe-59 -1.69E+00 1.55E+00 4.74E+00 U TM SF 283532024 8/3/2011 1-131 -3.69E-01 1.03E+00 3.38E+00 U D-80

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 283532024 8/3/2011 1-131 -8.27E-02 2.23E-01 7.45E-01 U TM SF 283532024 8/3/2011 K-40 1.56E+03 7.74E+01 1.74E+01 TM SF 283532024 8/3/2011 La-140 -1.14E+00 9.01E-01 2.68E+00 U TM SF 283532024 8/3/2011 Mn-54 -2.19E-01 6.04E-01 1.99E+00 U TM SF 283532024 8/3/2011 Nb-95 -5.92E-01 6.20E-01 1.98E+00 U TM SF, 283532024 8/3/2011 Ru-103 -1.46E+00 7.16E-01 1.91E+00 U TM SF 283532024 8/3/2011 Ru-106 -1.06E+00 5.31E+00 1.70E+01 U TM SF 283532024 8/3/2011 Sb-124 9.78E-01 1.20E+00 4.09E+00 U TM SF 283532024 8/3/2011 Sb-125 2.23E+00 1.67E+00 5.40E+00 U TM SF 283532024 8/3/2011 Se-75 -4.58E-01 7.55E-01 2.50E+00 U TM SF 283532024 8/3/2011 Th-228 -1.24E-01 1.53E+00 4.07E+00 U TM SF 283532024 8/3/2011 Zn-65 -1.21E+00 1.50E+00 4.71E+00 U TM SF 283532024 8/3/2011 Zr-95 3.88E-01 1.09E+00 3.70E+00 U TM LF 283532025 8/3/2011 Ac-228 -2.97E+00 4.63E+00 1.14E+01 U TM LF 283532025 8/3/2011 Ag-108m -1.09E+00 8.11E-01 2.48E+00 U TM LF 283532025 8/3/2011 Ag-il0m -4.78E-01 8.26E-01 2.65E-00 U TM LF 283532025 8/3/2011 Ba-140 -1.06E+00 1.27E+00 3.95E+00 U TM LF 283532025 8/3/2011 Be-7 7.36E+00 7.64E+00 2.52E+01 U TM LF 283532025 8/3/2011 Ce-141 2.17E+00 1.96E+00 5.36E+00 U TM LF 283532025 8/3/2011 Ce-144 1.32E+00 7.21E+00 2.01E+01 U TM LF 283532025 8/3/2011 Co-57 1.1OE+00 8.46E-01 2.67E+00 U TM LF 283532025 8/3/2011 Co-58 1.55E+00 9.44E-01 2.99E+00 U TM LF 283532025 8/3/2011 Co-60 6.79E-01 9.28E-01 3.13E+00 U TM LF 283532025 8/3/2011 Cr-51 -7.44E+00 8.50E+00 2.73E+01 U TM LF 283532025 8/3/2011 Cs-134 -3.06E-01 9.77E-01 3.16E+00 U TM LF 283532025 8/3/2011 Cs-137 1.57E-01 8.95E-01 2.95E+00 U TM LF 283532025 8/3/2011 Fe-59 3.42E+00 2.26E+00 7.15E+00 U TM LF 283532025 8/3/2011 1-131 2.40E-01 1.65E+00 5.51E+00 U TM LF 283532025 8/3/2011 1-131 -1.86E-01 2.10E-01 6.73E-01 U TM LF 283532025 8/3/2011 K-40 1.43E+03 7.92E+01 2.30E+01 TM LF 283532025 8/3/2011 La-140 -1.06E+00 1.27E+00 3.95E+00 U TM LF 283532025 8/3/2011 Mn-54 1.18E+00 8.94E-01 2.88E+00 U TM LF 283532025 8/3/2011 Nb-95 3.77E-01 8.73E-01 2.88E+00 U TM LF 283532025 8/3/2011 Ru-103 8.70E-01 9.40E-01 3.09E+00 U TM LF 283532025 8/3/2011 Ru-106 -8.18E+00 7.93E+00 2.47E+01 U TM LF 283532025 8/3/2011 Sb-124 5.94E-01 1.83E+00 6.14E+00 U TM LF 283532025 8/3/2011 Sb-125 3.60E-02 2.32E+00 7.69E+00 U TM LF 283532025 8/3/2011 Se-75 -7.45E-01 1.23E+00 4.02E+00 U TM LF 283532025 8/3/2011 Th-228 3.07E-01 2.88E+00 5.94E+00 U TM LF 283532025 8/3/2011 Zn-65 -8.88E-01 2.20E+00 7.03E+00 U TM LF 283532025 8/3/2011 Zr-95 -2.75E-01 1.62E+00 5.28E+00 U TM MR 284443023 8/17/2011 Ac-228 5.55E+00 3.89E+00 1.05E+01 U TM MR 284443023 8/17/2011 Ag-108m 4.87E-01 6.07E-01 2.04E+00 U TM MR 284443023 8/17/2011 Ag-ll0m -1.58E+00 7.89E-01 2.16E+00 U TM MR 284443023 8/17/2011 Ba-140 -1.63E+00 1.18E+00 3.40E+00 U TM MR 284443023 8/17/2011 Be-7 -4.62E+00 5.81E+00 1.87E+01 U TM MR 284443023 8/17/2011 Ce-141 6.99E-01 1.28E+00 3.94E+00 U TM MR- 284443023 8/17/2011 Ce-144 4.13E-01 4.55E+00 1.46E+01 U TM MR 284443023 8/17/2011 Co-57 1.13E+00 6.35E-01 1.97E+00 U TM MR 284443023 8/17/2011 Co-58 4.39E-02 7.48E-01 2.44E+00 U TM MR 284443023 8/17/2011 Co-60 -1.62E+00 1.06E+00 2.64E+00 U D-81

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 284443023 8/17/2011 Cr-51 -4.89E+00 6.77E+00 2.12E+01 TM MR 284443023 8/17/2011 Cs-134 -5.80E-01 8.88E-01 2.8 1E+00 TM MR 284443023 8/17/2011 Cs-137 1.78E+00 8.50E-01 2.60E+00 TM MR 284443023 8/17/2011 Fe-59 -2.51 E+00 1.85E+00 5.67E+00 TM MR 284443023 8/17/2011 1-131 2.06E+00 1.43E+00 4.44E+00 TM MR 284443023 8/17/2011 1-131 -8.43E-02 2.99E-01 9.94E-01 TM MR 284443023 8/17/2011 K-40 1.84E+03 8.74E+01 2.35E+01 TM MR 284443023 8/17/2011 La-140 -1.63E+00 1.18E+00 3.40E+00 TM MR 284443023 8/17/2011 Mn-54 -5.50E-01' 7.23E-01 2.26E+00 TM MR 284443023 8/17/2011 Nb-95 -3.01E-01 7.67E-01 2.47E+00 TM MR 284443023 8/17/2011 Ru-103 -9.46E-01 7.41E-01 2.28E+00 TM MR 284443023 8/17/2011 Ru-106 2.40E+00 6.11E+00 2.03E+01 TM MR 284443023 8/17/2011 Sb-124 1.63E+00 1.59E+00 5.31E+00 TM MR 284443023 8/17/2011 Sb-125 -2.03E+00 1.84E+00 5.83E+00 TM MR 284443023 8/17/2011 Se-75 -1.23E-01 9.41E-01 3.04E+00 TM MR 284443023 8/17/2011 Th-228 1.71E+00 1.77E+00 4.42E+00 TM MR 284443023 8/17/2011 Zn-65 '3.31E-02 1.82E+00 6.11E+00 TM MR 284443023 8/17/2011 Zr-95 4.57E-01 1.36E+00 4.47E+00 TlIM SF 284443024 8/17/2011 Ac-228 7.75E+00 3.04E+00 8.72E+00 TM SF 284443024 8/17/2011 Ag-108m 2.57E-01 5.50E-01 1.79E+00 TM SF 284443024 8/17/2011 Ag- l10m -3.94E-01 5.54E-01 1.79E+00 TM SF 284443024 8/17/2011 Ba- 140 -4.33E-01 8.09E-01 2.59E+00 TM. SF 284443024 8/17/2011 'Be-7 1.04E+00 5.37E+00 1.74E+01 TM SF 284443024 8/17/2011 Ce- 141 9.67E-01 1.13E+00 3.5 1E+00 TM SF 284443024 8/17/2011 Ce-144 -7.30E+00 4.57E+00 1.29E+01 TM SF 284443024 8/17/2011 Co-57 -5.39E-01 5.11E-01 1.65E+00 TM SF 284443024 8/17/2011 Co-58 5.34E-02 6.30E-01 2.09E+00 TM SF 284443024 8/17/2011 Co-60 -2.43E-01 7.14E-01 2.26E+00 TM SF 284443024 8/17/2011 Cr-51 -3.45E+00 5.92E+00 1.90E+01 TM SF 284443024 8/17/2011 Cs-134 1.24E+00 7.89E-01 2.56E+00 TM SF 284443024 8/17/2011 Cs-137 1.19E+00 6.47E-01 2.07E+00 TM SF 284443024 8/17/2011 Fe-59 1.72E+00 1.53E+00 4.96E+00 TM SF 284443024 8/17/2011 1-131 1.05E+00 1.1OE+00 3.59E+00 TM SF 284443024 8/17/2011 1-131 6.01E-01 3.18E-01 9.72E-01 TM SF 284443024 8/17/2011 K-40 1.44E+03 6.92E+01 1.64E+01 TM SF 284443024 8/17/2011 La-140 -4.33E-01 8.09E-01 2.59E+00 TM SF 284443024 8/17/2011 Mn-54 -1.32E+00 7.61E-01 1.95E+00 TM SF 284443024 8/17/2011 Nb-95 9.44E-01 6.50E-01 2.12E+00 TM SF -284443024 8/17/2011 Ru-103 -2.07E+00 8.27E-01 1.93E+00 TM SF 284443024 8/17/2011 Ru-106 2.82E-01 5.06E+00 1.70E+01 TM SF 284443024 8/17/2011 Sb-124 -1.01E+00 1.25E+00 3.87E+00 TM SF 284443024 8/17/2011 Sb-125 2.18E-01 1.61E+00 5.23E+00 TM SF 284443024 8/17/2011 Se-75 3.36E-01 7.94E-01 2.63E+00 TM SF 284443024 8/17/2011 Th-228 1.14E+00 1.64E+00 3.99E+00 TM SF 284443024 8/17/2011 Zn-65 -7.38E-01 1.53E+00 4.85E+00 TM SF 284443024 8/17/2011 Zr-95 -2.24E+00 1.16E+00 3.19E+00 TM LF 284443025 8/17/2011 Ac-228 -3.69E+00 3.89E+00 9.23E+00 TM LF 284443025 8/17/2011 Ag-108m -3.21E-01 6.44E-01

2.05E+00 TM LF 284443025 8/17/2011 Ag-Il0m -5.70E-01 6.40E-01 2.04E+00 TM LF 284443025 8/17/2011 Ba-140 -1.81E+00 1.06E+00 2.91E+00 TM LF 284443025 8/17/2011 Be-7 -1.26E+01 6.83E+00 1.89E+01 D-82

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCiL) (pCi/L)

TM LF 284443025 8/17/2011 Ce- 141 1.39E+00 1.80E+00 4.43E+00 U TM LF 284443025 8/17/2011 Ce- 144 2.10E+00 5.02E+00 1.65E+01 U TM LF 284443025 8/17/2011 Co-57 -2.46E-01 6.32E-01 2.11E+00 U TM LF 284443025 8/17/2011 Co-58 -1.85E+00 8.05E-01 2.05E+00 U TM LF 284443025 8/17/2011 Co-60 1.65E-01 7.58E-01 2.55E+00 U TM LF 284443025 8/17/2011 Cr-51 3.69E+00 7.02E+00 2.30E+01 U TM LF 284443025 8/17/2011 Cs-134 6.27E-01 8.72E-01 2.89E+00 U TM LF 284443025 8/17/2011 Cs-137 6.58E-01 7.10E-01 2.36E+00 U TM LF 284443025 8/17/2011 Fe-59 1.04E+00 1.59E+00 5.20E+00 U TM LF 284443025 8/17/2011 1-131 2.96E-02 2.74E-01 9.01E-01 U TM LF 284443025 8/17/2011 1-131 -2.61E+00 1.48E+00 4.23E+00 U TM LF 284443025 8/17/2011 K-40 1.48E+03 7.05E+01 1.97E+01 TM LF 284443025 8/17/2011 La-140 -1.81E+00 1.06E+00 2.91E+00 U TM LF 284443025 8/17/2011 Mn-54 -1.98E+00 9.07E-01 1.96E+00 U TM LF 284443025 8/17/2011 Nb-95 -3.14E-01 7.28E-01 2.37E+00 U TM LF 284443025 8/17/2011 Ru-103 -1.27E+00 8.17E-01 2.34E+00 U TM LF 284443025 8/17/2011 Ru-106 6.47E+00 6.35E+00 2.11E+01 U TM LF 284443025 8/17/2011 Sb-124 -2.7 1E+00 1.49E+00 3.93E+00 U TM LF 284443025 8/17/2011 Sb-125 -9.14E-01 1.96E+00 6.26E+00 U TM LF 284443025 8/17/2011 Se-75 -5.43E-01 1.02E+00 3.30E+00 U TM LF 284443025 8/17/2011 Th-228 7.19E+00 3.11E+00 5.47E+00 UI TM LF 284443025 8/17/2011 Zn-65 -3.96E+00 2.02E+00 5.42E+00 U TM LF 284443025 8/17/2011 Zr-95 -1.76E+00 1.31E+00 3.96E+00 U TM MR 285176023 8/31/2011 Ac-228 2.27E+00 5.43E+00 1.09E+01 U TM MR 285176023 8/31/2011 Ag-108m 6.15E-01 6.63E-01 2.12E+00 U TM MR 285176023 8/31/2011 Ag-Il0m -7.18E-01 7.02E-01 2.19E+00 U TM MR 285176023 8/31/2011 Ba- 140 1.49E-01 1.05E+00 3.44E+00 U TM MR 285176023 8/31/2011 Be-7 1.76E+00 5.78E+00 1.95E+01 U TM MR 285176023 8/31/2011 Ce- 141 6.18E-01 1.96E+00 3.85E+00 U TM MR 285176023 8/31/2011 Ce- 144 -3.43E-01 4.71E+00 1.54E+01 U TM MR 285176023 8/31/2011 Co-57 -9.33E-02 6.04E-01 2.05E+00 U TM MR 285176023 8/31/2011 Co-58 -3.39E-01 7.30E-01 2.33E+00 U TM MR 285176023 8/31/2011 Co-60 3.03E-01 7.84E-01 2.61E+00 U TM MR 285176023 8/31/2011 Cr-5I -3.34E+00 6.64E+00 2.13E+01 U TM MR 285176023 8/31/2011 Cs- 134 1.96E-01 8.76E-01 2.87E+00 U TM MR 285176023 8/31/2011 Cs-137 7.63E-01 7.68E-01 2.53E+00 U TM MR 285176023 8/31/2011 Fe-59 -1.80E+00 1.77E+00 5.58E+00 U TM MR 285176023 8/31/2011 1-131 -9.82E-02 3.01E-01 9.84E-01 U TM MR 285176023 8/31/2011 1-131 2.44E-01 1.20E+00 3.88E+00 U TM MR 285176023 8/31/2011 K-40 1.91E+03 9.08E+01 2.34E+01 TM MR 285176023 8/31/2011 La- 140 1.49E-01 1.05E+00 3.44E+00 U TM MR 285176023 8/31/2011 Mn-54 1.68E+00 8.30E-01 2.52E+00 U TM MR 285176023 8/31/2011 Nb-95 6.64E-01 7.45E-01 2.44E+00 U TM MR 285176023 8/31/2011 Ru-103 -9.62E-01 7.49E-01 2.32E+00 U TM MR 285176023 8/31/2011 Ru-106 8.99E+00 6.49E+00 2.11E+01 U TM MR 285176023 8/31/2011 Sb-124 4.83E-01 1.48E+00 4.86E+00 U TM MR 285176023 8/31/2011 Sb-125 2.17E+00 2.06E+00 6.54E+00 U TM MR 285176023 8/31/2011 Se-75 8.50E-01 1.02E+00 3.33E+00 U TM MR 285176023 8/31/2011 Th-228 1.01E-01 2.47E+00 5.04E+00 U, TM MR 285176023 8/31/2011 Zn-65 -2.46E+00 1.92E+00 5.89E+00 U TM MR 285176023 8/31/2011 Zr-95 1.45E+00 1.29E+00 4.20E+00 U D-83

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 285176024 8/31/2011 Ac-228 -6.32E+00 5.13E+00 1.22E+01 U TM SF 285176024 8/31/2011 Ag-108m -4.34E-01 7.90E-01 2.57E+00 U TM SF 285176024 8/31/2011 Ag-Il0m -7.70E-01 8.21E-01 2.57E+00 U TM SF 285176024 8/31/2011 Ba- 140 6.24E-01 1.28E+00 4.31E+00 U TM SF 285176024 8/31/2011 Be-7 -1.15E+01 7.83E+00 2.35E+01 U TM SF 285176024 8/31/2011 Ce- 141 -3.60E+00 1.97E+00 5.62E+00 U TM SF 285176024 8/31/2011 Ce-I144 -5.33E+00 6.69E+00 2.11E+OI U TM SF 285176024 8/31/2011 Co-57 8.10E-02 8.46E-01 2.76E+00 U TM SF 285176024 8/31/2011 Co-58 -2.75E-01 8.55E-01 2.76E+00 U TM SF 285176024 8/31/2011 Co-60 -1.34E+00 9.95E-01 2.99E+00 U TM SF 285176024 8/31/2011 Cr-51 -1.24E+01 9.21E+00 2.85E+01 U TM SF 285176024 8/31/2011 Cs-134 1.02E+00 1.07E+00 3.49E+00 U TM SF 285176024 8/31/2011 Cs-137 1.59E+00 9.29E-01 2.93E+00 U TM SF 285176024 8/31/2011 Fe-59 2.76E-01 2.09E+00 6.80E+00 U TM SF 285176024 8/31/2011 1-131 5.32E-01 3.03E-01 9.62E-01 U TM SF 285176024 8/31/2011 1-131 -4.67E+00 2.OOE+00 5.26E+00 U TM SF 285176024 8/31/2011 K-40 1.53E+03 8.35E+01 2.66E+01 TM SF 285176024 8/31/2011 La-140 6.24E-01 1.28E+00 4.3 1E+00 U TM SF 285176024 8/31/2011 Mn-54 2.39E+00 1.01E+00 2.95E+00 U TM SF 285176024 8/31/2011 Nb-95 -3.85E-01 8.67E-01 2.79E+00 U TM SF 285176024 8/31/2011 Ru- 103 8.74E-01 8.80E-01 2.89E+00 U TM SF 285176024 8/31/2011 Ru-I106 -8.82E+00 7.66E+00 2.36E+01 U TM SF 285176024 8/31/2011 Sb-124 -3.06E+00 2.03E+00 5.69E+00 U TM SF 285176024 8/31/2011 Sb-125 -2.37E+00 2.42E+00 7.66E+00 U TM SF 285176024 8/31/2011 Se-75 -5.94E-01 1.23E+00 4.07E+00 U TM SF 285176024 8/31/2011 Th-228 -5.77E-03 2.52E+00 6.15E+00 U TM SF 285176024 8/31/2011 Zn-65 6.43E+00 2.65E+00 7.63E+00 U TM SF 285176024 8/31/2011 Zr-95 -5.53E-01 1.51E+00 4.88E+00 U TM LF 285176025 8/31/2011 Ac-228 -7.62E+00 1.12E+01 1.39E+01 U TM LF 285176025 8/31/2011 Ag-108m -1.63E-01 7.96E-01 2.55E+00 U TM LF 285176025 8/31/2011 Ag-il0m -3.51E-01 9.60E-01 3.14E+00 U TM LF 285176025 8/31/2011 Ba-140 6.1OE-01 1.45E+00 4.84E+00 U TM LF 285176025 8/31/2011 Be-7 -7.09E+00 8.52E+00 2.61E+01 U TM LF 285176025 8/31/2011 Ce-141 -6.61E-01 1.68E+00 4.86E+00 U TM LF 285176025 8/31/2011 Ce-144 -6.08E+00 5.90E+00 1.80E+01 U TM LF 285176025 8/31/2011 Co-57 -4.60E-01 6.88E-01 2.16E+00 U TM LF 285176025 8/31/2011 Co-58 -3.54E-01 9.68E-01 3.11E+00 U TM LF 285176025 8/31/2011 Co-60 2.75E+00 1.27E+00 4.04E+00 U TM LF 285176025 8/31/2011 Cr-51 -1.35E+01 1.19E+0I 2.70E+01 U TM LF 285176025 8/31/2011 Cs-134 -2.39E-01 1.15E+00 3.73E+00 U TM LF 285176025 8/31/2011 Cs-137 1.41E+00 1.06E+00 3.49E+00 U TM LF 285176025 8/31/2011 Fe-59 -1.12E+00 2.44E+00 7.99E+00 U TM LF 285176025 8/31/2011 1-131 -1.05E-01 2.99E-01 9.77E-01 U TM LF 285176025 8/31/2011 1-131 9.75E-01 1.72E+00 5.65E+00 U TM LF 285176025 8/31/2011 K-40 1.43E+03 7.64E+01 3.69E+01 TM LF 285176025 8/31/2011 La-140 6.10E-01 i .45E+00 4.84E+00 U.

TM LF 285176025 8/31/2011 Mn-54 -1.86E+00 1.11E+00 3.08E+00 U TM LF 285176025 8/31/2011 Nb-95 -9.98E-01 1.03E+00 3.18E+00 U TM LF 285176025 8/31/2011 Ru-103 -1.58E+00 1.08E+00 3.06E+00 U TM LF 285176025 8/31/2011 Ru-106 -2.32E+00 8.05E+00 2.65E+01 U TM LF 8/31/2011 285176025 Sb-124 -8.06E-01 2.28E+00 7.15E+00 U D-84

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 285176025 8/31/2011 Sb-125 -1.39E+00 2.46E+00 7.75E+00 U TM LF 285176025 8/31/2011 Se-75 9.26E-02 1.14E+00 3.80E+00 U TM LF 285176025 8/31/2011 Th-228 4.78E-01 2.21E+00 6.15E+00 U TM LF 285176025' 8/31/2011 Zn-65 4.68E+00 3.OOE+00 8.76E+00 U TM LF 285176025 8/31/2011 Zr-95 2.11 E-01 1.94E+00 6.42E+00 U TM MR 286154023 9/14/2011 Ac-228 4.18E-01 4.08E+00 1.32E+01 U TM MR 286154023 9/14/2011 Ag-108m 1.94E-01 7.97E-01 2.65E+00 U TM MR- 286154023 9/14/2011 Ag-il0m -6.OOE-01 9.07E-01 2.80E+00 U TM MR 286154023 9/14/2011 Ba-140 8.27E-01 1.32E+00 4.55E+00 U TM MR 286154023 9/14/2011 Be-7 -8. 1OE+00 7.62E+00 2.32E+01 U TM MR 286154023 9/14/2011 Ce- 141 -5.22E+00 2.25E+00 4.88E+00 U TM MR 286154023 9/14/2011 Ce- 144 -2.79E+00 6.18E+00 1.98E+01 U TM MR 286154023 9/14/2011 Co-57 -5.35E-01 8.09E-01 2.57E+00 U TM MR 286154023 9/14/2011 Co-58 -8.83E-01 9.32E-01 2.92E+00 U TM MR 286154023 9/14/2011 Co-60 -2.65E+00 1.29E+00 3.12E+00 U TM MR 286154023 9/14/2011 Cr-51 1.46E+01 8.72E+00 2.82E+01 U TM MR 286154023 9/14/2011 Cs-134 -1.24E+00 1.10E+00 3.37E+00 U TM MR 286154023 9/14/2011 Cs-137 7.14E-01 1.02E+00 3.33E+00 U TM MR 286154023 9/14/2011 Fe-59 3.98E-01 2.26E+00 7.49E+00 U TM MR 286154023 9/14/2011 1-131 3.19E-01 3.02E-01 9.80E-01 U TM MR 286154023 9/14/2011 1-131 -4.55E-01 1.62E400 5.35E+00 U TM MR 286154023 9/14/2011 K-40 2.04E+03 1.05E+02 2.70E+01 TM MR 286154023 9/14/2011 La-140 8.27E-01 1.32E+00 4.55E+00 U TM MR 286154023 9/14/2011 Mn-54 -7.22E-01 1.01E+00 3.26E+00 U TM MR 286154023 9/14/2011 Nb-95 -2.56E-01 9.69E-01 3.23E+00 U TM MR 286154023 9/14/2011 Ru-103 2.88E-02 9.03E-01 2.96E+00 U TM MR 286154023 9/14/2011 Ru-106 -3.14E-01 7.72E+00 2.49E+01 U TM MR 286154023 9/14/2011 Sb-124 -7.86E-01 1.68E+00 5.35E+00 U TM MR 286154023 9/14/2011 Sb-125 -4.62E+00 2.55E+00 7.10E+00 U TM MR 286154023 9/14/2011 Se-75 1.63E+00 1.21E+00 4.02E+00 U TM MR 286154023 9/14/2011 Th-228 -2.29E+00 2.19E+00 6.02E+00 U TM MR 286154023 9/14/2011 Zn-65 -8.91E-01 2.43E+00 7.81E+00 U TM MR 286154023 9/14/2011 Zr-95 2.47E+00 1.75E+00 5.89E+00 U TM SF 286154024 9/14/2011 Ac-228 -3.73E+00 4.56E+00 8.70E+00 U TM SF 286154024 9/14/2011 Ag-108m -6.34E-02 5.40E-01 1.76E+00 U TM SF 286154024 9/14/2011 Ag-Il0m -6.38E-01 5.98E-01 1.90E+00 U TM SF 286154024 9/14/20 11 Ba- 140 9.97E-01 9.27E-01 3.13E+00 U TM SF 286154024 9/14/2011 Be-7 -4.79E+00 6.73E+00 1.68E+01 U TM SF 286154024 9/14/2011 Ce- 141 -4.05E-01 1.45E+00 3.64E+00 U TM SF 286154024 9/14/2011 Ce- 144 -1.27E+00 4.16E+00 1.33E+01 U TM SF 286154024 9/14/2011 Co-57 9.56E-02 5.25E-01 1.70E+00 U TM SF 286154024 9/14/2011 Co-58 3.82E-01 6.25E-01 2.09E+00 U TM SF 286154024 9/14/2011 Co-60 -7.16E-01 8.87E-01 2.50E+00 U TM SF 286154024 9/14/2011 Cr-51 -2.05E+00 5.90E+00 1.94E+01 U TM SF 286154024 9/14/2011 Cs-134 -2.02E-01 7.52E-01 2.48E+00 U TM SF 286154024 9/14/2011 Cs-137 -3.58E-01 8.82E-01 2.22E+00 U TM SF 286154024 9/14/2011 Fe-59 6.68E-02 1.50E+00 4.89E+00 U TM SF 286154024. 9/14/2011 1-131 6.16E-02 2.58E-01 8.73E-01 U TM SF 286154024 9/14/2011 1-131 -4.17E-01 1.15E+00 3.76E+00 U TM SF 286154024 9/14/2011 K-40 1.50E+03 7.09E+01 1.90E+01 TM SF 286154024 9/14/2011 La-140 9.97E-01 9.26E-01 3.13E+00 U D-85

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 286154024 9/14/2011 Mn-54 -6.37E-02 5.84E-01 1.93E+00 U TM SF 286154024 9/14/2011 Nb-95 -1.40E-01 6.41E-01 2.12E+00 U TM SF 286154024 9/14/2011 Ru-103 -6.07E-01 6.84E-01 2.12E+00 U TM SF 286154024 9/14/2011 Ru-106 -7.32E-01 5.16E+00 1.64E+01 U TM SF 286154024 9/14/2011 Sb-124 1.24E+00 1.32E+00 4.47E+00 U TM SF 286154024 9/14/2011 Sb-125 5.22E-01 1.66E+00 5.45E+00 U TM SF 286154024 9/14/2011 Se-75 3.60E-01 8.27E-01 2.78E+00 U TM SF 286154024 9/14/2011 Th-228 -2.45E+00 1.79E+00 4.19E+00 U TM SF 286154024 9/14/2011 Zn-65 -5.86E+00 2.14E+00 4.66E+00 U TM SF 286154024 9/14/2011 Zr-95 8.93E-01 1.14E+00 3.82E+00 U TM LF 286154025 9/14/2011 Ac-228 3.83E+00 2.90E+00 9.39E+00 U TM LF 286154025 9/14/2011 Ag-108m -4.31E-01 6.15E-01 1.93E+00 U TM LF 286154025 9/14/2011 Ag-Il0m -6.97E-01 6.42E-01 2.01E+00 U TM LF 286154025 9/14/2011 Ba- 140 1.17E+00 9.93E-01 3.34E+00 U TM LF 286154025 9/14/2011 Be-7 -8.86E-01 5.94E+00 1.91E+01 U TM LF 286154025 9/14/2011 Ce- 141 -1.42E+00 1.75E+00 4.29E+00 U TM LF 286154025 9/14/2011 Ce- 144 3.19E+00 4.90E+00 1.60E+01 U TM LF 286154025 9/14/2011 Co-57 -1.09E-02 6.09E-01 2.06E+00 U TM LF 286154025 9/14/2011 Co-58 -1.75E+00 8.03E-01 2.11E+00 U TM LF 286154025 9/14/2011 Co-60 3.82E-01 7.49E-01 2.53E+00 U TM LF 286154025 9/14/2011 Cr-51 -3.66E+00 7.01E+00 2.26E+01 U TM LF 286154025 9/14/2011 Cs-134 -1.24E+00 8.46E-01 2.50E+00 U, TM LF 286154025 9/14/2011 Cs-137 4.95E-01 6.65E-01 2.23E+00 U TM LF 286154025 9/14/2011 Fe-59 -4.43E+00 1.98E+00 5.OOE+00 U TM LF 286154025 9/14/2011 1-131 1.68E+00 1.39E+00 4.45E+00 U TM LF 286154025 9/14/2011 1-131 1.04E-01 2.75E-01 9.05E-01 U TM LF 286154025 9/14/2011 K-40 1.43E+03 6.89E+01 1.80E+01 TM LF 286154025 9/14/2011 La-140 1.17E+00 9.92E-01 3.34E+00 U TM LF 286154025 9/14/2011 Mn-54 5.92E-01 6.54E-01 2.16E+00 U TM LF 286154025 9/14/2011 Nb-95 3.19E-01 6.85E-01 2.28E+00 U TM LF 286154025 9/14/2011 Ru-103 -9.95E-02 7.13E-01 2.29E+00 U TM LF 286154025 9/14/2011 Ru-106 -3.91E+00 6.09E+00 1.98E+01 U TM LF 286154025 9/14/2011 Sb-124 -2.22E+00 1.54E+00 4.39E+00 U TM LF 286154025 9/14/2011 Sb-125 -2.94E+00 2.OOE+00 5.86E+00 U TM LF 286154025 9/14/2011 Se-75 -1.67E+00 1.03E+00 3.05E+00 U TM LF 286154025 9/14/2011 Th-228 -1.67E+00 2.27E+00 5.24E+00 U TM LF 286154025 9/14/2011 Zn-65 1.40E-01 1.69E+00 5.50E+00 U TM LF 286154025 9/14/2011 Zr-95 1.38E+00 1.27E+00 4.17E+00 U TM MR 286954023 9/28/2011 Ac-228 4.74E+00 4.46E+00 1.21E+01 U TM MR 286954023 9/28/2011 Ag-108m -4.03E-01 7.27E-01 2.27E+00 U TM MR 286954023 9/28/2011 Ag-110m -2.47E-02 7.58E-01 2.49E+00 U TM MR 286954023 9/28/2011 Ba-140 8.98E-01 1.11E+00 3.78E+00 U TM MR 286954023 9/28/2011 Be-7 9.29E+00 7.12E+00 2.35E+01 U TM MR 286954023 9/28/2011 Ce- 141 3.70E-02 1.52E+00 4.83E+00 U TM MR 286954023 9/28/2011 Ce- 144 -1.11E+00 5.48E+00 1.74E+01 U TM MR 286954023 9/28/2011 Co-57 1.14E+00 7.71E-01 2.37E+00 U TM MR 286954023 9/28/2011 Co-58 3.17E-01 8.13E-01 2.66E+00 U TM MR 286954023 9/28/2011 Co-60 -2.08E-01 1.15E+00 3.33E+00 U TM MR 286954023 9/28/2011 Cr-51 1.03E+01 8.17E+00 2.62E+01 U TM MR 286954023 9/28/2011 Cs-134 -1.31E+00 1.02E+00 2.99E+00 U TM MR 286954023 9/28/2011 Cs-137 7.94E-01 8.75E-01 2.88E+00 U D-86

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 286954023 9/28/2011 Fe-59 -2.98E-02 1.99E+00 6.57E+00 U TM MR 286954023 9/28/2011 1-131 1.32E+00 1.51E+00 4.89E+00 U TM MR 286954023 9/28/2011 1-131 -1.17E-01 2.24E-01 7.41E-01 U

'TM MR 286954023 9/28/2011 K-40 2.01E+03 9.90E+01 2.53E+01 TM MR 286954023 9/28/2011 La-140 8.98E-01 1.10E+00 3.78E+00 U TM MR 286954023 9/28/2011 Mn-54 -2.03E+00 1.28E+00 2.67E+00 U TM MR 286954023 9/28/2011 Nb-95 1.24E+00 9.16E-01 2.94E+00 U TM MR 286954023 9/28/2011 Ru-103 -1.13E+00 8.57E-01 2.63E+00 U TM MR 286954023 9/28/2011 Ru-106 -4.32E+00 7.26E+00 2.34E+01 U TM MR 286954023 9/28/2011 Sb-124 -3.09E-02 1.60E+00 5.29E+00 U TM MR 286954023 9/28/2011 Sb-125 2.92E+00 2.22E+00 7.OOE+00 U TM MR 286954023 9/28/2011 Se-75 6.64E-01 1.11E+00 3.68E+00 U TM MR 286954023 9/28/2011 Th-228 8.44E-01 3.22E+00 6.68E+00 U TM MR 286954023 9/28/2011 Zn-65 3.40E+00 2.33E+00 6.65E+00 U TM MR 286954023 9/28/2011 Zr-95 2.18E-01 1.49E+00 4.87E+00 U TM SF 286954024 9/28/2011 Ac-228 3.64E+00 4.15E+00 1.1OE+0I U TM SF 286954024 9/28/2011 Ag-108m -9.33E-01 6.90E-01 2.01E+00 U TM SF 286954024 9/28/2011 Ag-Ii0m -1.23E+00 7.89E-01 2.31E+00 U TM SF 286954024 9/28/2011 Ba-140 -9.29E-01 1.17E+00 3.56E+00 U TM SF 286954024 9/28/2011 Be-7 8.90E+00 6.57E+00 2.17E+01 U TM SF 286954024 9/28/2011 Ce- 141 3.43E+00 2.07E+00 4.35E+00 U TM SF 286954024 9/28/2011 Ce- 144 1.02E+01 5.63E+00 1.76E+01 U TM SF 286954024 9/28/2011 Co-57 4.79E-01 6.85E-01 2.32E+00 U TM SF 286954024 9/28/2011 Co-58 -6.19E-01 8.17E-01 2.55E+00 U TM SF 286954024 9/28/2011 Co-60 4.67E-01 8.13E-01 2.72E+00 U TM SF 286954024 9/28/2011 Cr-51 -1.39E+01 7.98E+00 2.27E+01 U TM SF 286954024 9/28/2011 Cs-134 6.56E-01 8.78E-01 2.89E+00 U TM SF 286954024 9/28/2011 Cs-137 4.41E-01 8.08E-01 2.68E+00 U TM SF 286954024 9/28/2011 Fe-59 8.21E-01 1.77E+00 5.96E+00 U TM SF 286954024 9/28/2011 1-131 -2.33E-01 1.39E+00 4.46E+00 U TM SF 286954024 9/28/2011 1-131 1.51E-01 2.65E-01 8.73E-01 U TM SF 286954024 9/28/2011 K-40 1.42E+03 7.21E+01 2.14E+01 TM SF 286954024 9/28/2011 La-140 -9.29E-01 1.17E+00 3.56E+00 U TM SF 286954024 9/28/2011 Mn-54 -8.48E-01 8.I1E-01 2.47E+00 U TM SF 286954024 9/28/2011 Nb-95 8.42E-01 9.67E-01 2.66E+00 U TM SF 286954024 9/28/2011 Ru-103 -8.69E-01 8.21E-01 2.60E+00 U TM SF 286954024 9/28/2011 Ru-106 -2.96E+00 6.63E+001 2.16E+01 U TM SF 286954024 9/28/2011 Sb-124 -1.52E+00 1.73E+00 5.17E+00 U TM SF 286954024 9/28/2011 Sb-125 -1.74E+00 2.59E+00 6.73E+00 U TM SF 286954024 9/28/2011 Se-75 1.26E+00 1.1OE+00 3.55E+00 U TM SF 286954024 9/28/2011 Th-228 2.47E-01 3.11E+00 5.61E+00 U TM SF 286954024 9/28/2011 Zn-65 -1.66E+00 2.30E+00 6.3 1E+00 U TM SF 286954024 9/28/2011 Zr-95 7.70E-01 1.35E+00 4.44E+00 U TM LF 286954025 9/28/2011 Ac-228 8.16E-01 3.13E+00 8.77E+00 U TM LF 286954025 9/28/2011 Ag-108m -4.31E-01 5.69E-01 1.78E+00 U TM LF 286954025 9/28/2011 Ag-il0m -3.69E-01 5.72E-01 1.86E+00 U TM LF 286954025 9/28/2011 Ba-140 -5.17E-01 8.89E-01 2.84E+00 U TM LF 286954025 9/28/2011 Be-7 1.15E+01 5.85E+00 1.77E+01 U TM LF 286954025 9/28/2011 Ce- 141 -4.18E-01 1.07E+00 3.45E+00 U TM LF 286954025 9/28/2011 Ce- 144 1.81E-00 3.77E+00 1.28E+01 U TM LF 286954025 9/28/2011 Co-57 -1.92E-01 6.29E-01 1.70E+00 U D-87

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 286954025 9/28/2011 Co-58 -3.16E-01 6.41E-01 2.08E+00 U TM LF 286954025 9/28/2011 Co-60 -5.94E-01 8.60E-01 2.38E+00 U TM LF 286954025 9/28/2011 Cr-51 1.13E+00 5.68E+00 1.87E+01 U TM LF 286954025 9/28/2011 Cs-134 -1.47E+00 1.24E+00 2.48E+00 U TM LF 286954025 9/28/2011 Cs-137 -3.36E-02 6.12E-01 2.05E+00 U TM LF 286954025 9/28/2011 Fe-59 -1.25E+00 1.42E+00 4.39E+00 U TM LF 286954025 9/28/2011 1-131 5.30E-01 1.14E+00 3.72E+00 U TM LF 286954025 9/28/2011 1-131 7.81E-01 3.38E-01 7.91E-01 U TM LF 286954025 9/28/2011 K-40 1.42E+03 6.82E+01 1.66E+01 TM LF 286954025 9/28/2011 La-140 -5.17E-01 8.89E-01 2.84E+00 U TM LF 286954025 9/28/2011 Mn-54 4.91E-01 6.26E-01 2.09E+00 U TM LF 286954025 9/28/2011 Nb-95 -1.38E+00 8.91E-01 2.05E+00 U TM LF 286954025 9/28/2011 Ru-103 -8.61E-01 6.74E-01 1.98E+00 U TM LF 286954025 9/28/2011 Ru-106 -5.30E+00 5.19E+00 1.64E+01 U TM LF 286954025 9/28/2011 Sb-124 -1.85E+00 1.22E+00 3.37E+00 U TM LF 286954025 9/28/2011 Sb-125 2.31E-01 1.70E+00 5.53E+00 U TM LF 286954025 9/28/2011 Se-75 4.42E-01 7.94E-01 2.63E+00 U TM LF 286954025 9/28/2011 Th-228 -1.85E+00 1.57E+00 4.04E+00 U TM LF 286954025 9/28/2011 Zn-65 -1.16E+00 1.57E+00 4.91E+00 U TM LF 286954025 9/28/2011 Zr-95 1.03E-02 1.07E+00 3.55E+00 U TM MR 288123023 10/12/2011 Ac-228 4.43E+00 4.91E+00 1.19E+01 U TM MR 288123023 10/12/2011 Ag-108m -8.59E-02 7.29E-01 2.32E+00 U TM MR 288123023 10/12/2011 Ag-Il0m 2.99E-01 7.59E-01 2.52E+00 U TM MR 288123023 10/12/2011 Ba-140 -4.90E-01 1.05E+00 3.3 1E+00 U TM MR 288123023 10/12/2011 Be-7 5.43E+00 6.32E+00 2.13E+01 U TM MR 288123023 10/12/2011 Ce- 141 2.35E+00 1.44E+00 4.47E+00 U TM MR 288123023 10/12/2011 Ce-144 -9.49E+00 5.65E+00 1.70E+01 U TM MR 288123023 10/12/2011 Co-57 -4.85E-01 6.69E-01 2.22E+00 U TM MR 288123023 10/12/2011 Co-58 -3.22E-01 8.28E-01 2.65E+00 U TM MR 288123023 10/12/2011 Co-60 4.04E-01 9.38E-01 3.12E+00 U TM MR 288123023 10/12/2011 Cr-51 -5.14E+00 7.32E+00 2.32E+01 U TM MR 288123023 10/12/2011 Cs-134 -1.62E+00 1.34E+00 3.28E+00 U TM MR 288123023 10/12/2011 Cs-137 9.21E-01 8.75E-01 2.88E+00 U TM MR 288123023 10/12/2011 Fe-59 1.54E+00 1.84E+00 6.15E+00 U TM MR 288123023 10/12/2011 1-131 5.81E-02 2.83E-01 9.36E-01 U TM MR 288123023 10/12/2011 1-131 5.58E-02 1.19E+00 3.84E+00 U TM MR 288123023 10/12/2011 K-40 1.93E+03 9.30E+01 2.56E+01 TM MR 288123023 10/12/2011 La-140 -4.90E-01 1.05E+00 3.31E+00 U TM MR 288123023 10/12/2011 Mn-54 -2.44E-01 8.08E-01 2.60E+00 U TM MR 288123023 10/12/2011 Nb-95 1.53E+00 8.74E-01 2.75E+00 U TM MR 288123023 10/12/2011 Ru-103 -1.27E+00 8.57E-01 2.59E+00 U TM MR 288123023 10/12/2011 Ru-106 -1.09E+01 7.28E+00 2.16E+01 U TM MR 288123023 10/12/2011 Sb-124 -3.09E-01 1.51E+00 4.81E+00 U TM MR 288123023 10/12/2011 Sb-125 -3.87E+00 2.97E+00 6.77E+00 U TM MR 288123023 10/12/2011 Se-75 9.63E-01 1.06E+00 3.47E+00 U TM MR 288123023 10/12/2011 Th-228 -4.94E-01 2.08E+00 5.40E+00 U TM MR 288123023 10/12/2011 Zn-65 1.07E+00 2.15E+00 7.21E+00 U TM MR 288123023 10/12/2011 Zr-95 2.31 E+00 1.49E+00 4.76E+00 U TM SF 288123024 10/12/2011 Ac-228 -9.33E+00 4.88E+00 1.00E+01 U TM SF 288123024 10/12/2011 Ag-108m -7.79E-01 6.17E-01 1.84E+00 U TM SF 288123024 10/12/2011 Ag-Il0m -2.01E+00 8.26E-01 2.07E+00 U D-88

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 288123024 10/12/2011 Ba-140 -8.15E-01 1.03E+00 3.14E+00 U TM SF 288123024 10/12/2011 Be-7 -3.39E+00 5.78E+00 1.81E+01 U TM SF 288123024 10/12/2011 Ce-141 -1.46E-01 1.13E+00 3.62E+00 U TM SF 288123024 10/12/2011 Ce-144 1.49E-01 4.38E+00 1.41E+01 U TM SF 288123024 10/12/2011 Co-57 3.22E-01 5.71E-01 1.85E+00 U TM SF 288123024 10/12/2011 Co-58 -1.57E-01 7.11E-01 2.30E+00 U TM SF 288123024 10/12/2011 Co-60 1.21E+00 8.39E-01 2.74E+00 U TM SF 288123024 10/12/2011 Cr-51 -1.55E+00 6.04E+00 1.98E+01 U TM SF 288123024 10/12/2011 Cs-134 -9.96E-01 9.10E-01 2.78E+00 U TM SF 288123024 10/12/2011 Cs-137 -8.42E-01 1.19E+00 2.75E+00 U TM SF 288123024 10/12/2011 Fe-59 -4.22E-01 1.62E+00 5.36E+00 U TM SF 288123024 10/12/2011 1-131 -8.03E-01 1.04E+00 3.28E+00 U TM SF 288123024 10/12/2011 1-131 -2.41E-01 2.58E-01 8.27E-01 U TM SF 288123024 10/12/2011 K-40 1.45E+03 7.04E+01 2.20E+01 TM SF 288123024 10/12/2011 La-140 -8.15E-01 1.03E+00 3.14E+00 U TM SF 288123024 10/12/2011 Mn-54 2.03E-01 6.97E-01 2.29E+00 U TM SF 288123024 10/12/2011 Nb-95 2.77E-01 7.36E-01 2.43E+00 U TM SF 288123024 10/12/2011 Ru-103 3.86E-01 7.43E-01 2.39E+00 U TM SF 288123024 10/12/2011 Ru-106 3.15E+00 5.85E+00 1.97E+01 U TM SF 288123024 10/12/2011 Sb-124 -3.93E-02 1.26E+00 4.22E+00 U TM SF 288123024 10/12/2011 Sb-125 -3.13E+00 2.03E+00 5.88E+00 U TM SF 288123024 10/12/2011 Se-75 6.73E-01 9.05E-01 3.01E+00 U TM SF 288123024 10/12/2011 Th-228 1.43E+00 2.10E+00 4.80E+00 U TM SF 288123024 10/12/2011 Zn-65 6.48E-01 1.70E+00 5.70E+00 U TM SF 288123024 10/12/2011 Zr-95 -1.62E-01 1.26E+00 4.13E+00 U TM LF 288123025 10/12/2011 Ac-228 2.42E+00 3.78E+00 1.01E+01 U TM LF 288123025 10/12/2011 Ag-108m -6.11E-01 5.39E-01 1.68E+00 U TM LF 288123025 10/12/2011 Ag-110m -5.77E-01 6.OOE-01 1.83E+00 U TM LF 288123025 10/12/2011 Ba-140 5.44E-03 8.1OE-01 2.69E+00 U TM LF 288123025 i0/12/2011 Be-7 -2.63E+00 5.06E+00 1.64E+01 U TM LF 288123025 10/12/2011 Ce-141 5.37E-01 1.02E+00 3.40E+00 U TM LF 288123025 10/12/2011 Ce-144 -4.97E+00 4.14E+00 1.30E+01 U TM LF 288123025 10/12/2011 Co-57 5.61E-01 5.30E-01 1.75E+00 U TM LF 288123025 10/12/2011 Co-58 1.05E+00 6.32E-01 2.07E+00 U TM LF 288123025 10/12/2011 Co-60 -5.40E-01 7.47E-01 2.29E+00 U TM LF 288123025 10/12/2011 Cr-51 6.65E+00 5.55E+00 1.86E+01 U TM LF 288123025 10/12/2011 Cs-134 1.75E-01 7.71E-01 2.61E+00 U TM LF 288123025 10/12/2011 Cs-137 3.57E-01 6.62E-01 2.16E+00 U TM LF 288123025 10/12/2011 Fe-59 -1.05E-01 1.42E+00 4.65E+00 U TM LF 288123025 10/12/2011 1-131 4.45E-01 9.52E-01 3.23E+00 U TM LF 288123025 10/12/2011 1-131 -1.05E-01 2.84E-01 9.22E-01 U TM LF 288123025 10/12/2011 K-40 1.42E+03 7.31E+01 2.19E+01 TM LF 288123025 10/12/2011 La-140 5.44E-03 8.10E-01 2.69E+00 U TM LF 288123025 10/12/2011 Mn-54 -2.23E+00 9.67E-01 1.99E+00 U TM LF 288123025 10/12/2011 Nb-95 -1.23E+00 9.99E-01 2.19E+00 U TM LF 288123025 10/12/2011 Ru-103 -6.11E-01 6.56E-01 2.06E+00 U TM LF 288123025 10/12/2011 Ru-106 -2.04E+00 5.77E+00 1.85E+01 U TM LF 288123025 10/12/2011 Sb-124 -1.76E+00 1.40E+00 4.06E+00 U TM LF 288123025 10/12/2011 Sb-125 -1.47E-01 1.65E+00 5.50E+00 U TM LF 288123025 10/12/2011 Se-75 -1.14E+00 8.61E-01 2.55E+00 U TM LF 288123025 10/12/2011 Th-228 -9.68E-01 1.70E+00 4.44E+00 U D-89

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 288123025 10/12/2011 Zn-65 -1.62E+00 1.73E+00 5.35E+00 U TM LF 288123025 10/12/2011 Zr-95 -3.20E-01 1.13E+00 3.76E+00 U TM MR 289108023 10/26/2011 Ac-228 2.88E+00 3.66E+00 1.1 1E+01 U TM MR 289108023 10/26/2011 Ag-108m 3.64E-01 6.14E-01 2.06E+00 U TM MR 289108023 10/26/2011 Ag-Il0m -1.57E+00 8.84E-01 2.19E+00 U TM MR 289108023 10/26/2011 Ba-140 1.70E+00 9.76E-01 3.28E+00 U TM MR 289108023 10/26/2011 Be-7 3.91E+00 5.92E+00 1.97E+01 U TM MR 289108023 10/26/2011 Ce-141 -1.17E+00 1.18E+00 3.77E+00 U TM MR 289108023 10/26/2011 Ce-144 7.23E+00 4.70E+00 1.50E+01 U TM MR 289108023 10/26/2011 Co-57 2.18E-01 5.72E-01 1.93E+00 U TM MR 289108023 10/26/2011 Co-58 -1.30E+00 7.58E-01 2.18E+00 U TM MR 289108023 10/26/2011 Co-60 7.92E-01 8.58E-01 2.81E+00 U TM MR 289108023 10/26/2011 Cr-51 3.22E+00 6.26E+00 2.14E+01 U TM MR 289108023 10/26/2011 Cs-134 4.45E-01 8.51E-01 2.89E+00 U TM MR 289108023 10/26/2011 Cs-137 1.63E-01 7.96E-01 2.59E+00 U TM MR 289108023 10/26/2011 Fe-59 4.95E-02 1.76E+00 5.77E+00 U TM MR 289108023 10/26/2011 1-131 -9.20E-01 1.05E+00 3.39E+00 U TM MR 289108023 10/26/2011 1-131 -7.78E-02 2.42E-01 8.16E-01 U TM MR 289108023 10/26/2011 K-40 1.79E+03 9.13E+01 1.91E+01 TM MR 289108023 10/26/2011 La-140 1.70E+00 9.74E-01 3.28E+00 U TM MR 289108023 10/26/2011 Mn-54 -7.20E-01 7.60E-01 2.41E+00 U TM MR 289108023 10/26/2011 Nb-95 -4.lIE-01 9.66E-01 2.44E+00 U TM MR 289108023 10/26/2011 Ru-103 -3.26E-01 7.45E-01 2.42E+00 U TM MR 289108023 10/26/2011 Ru-106 -3.77E+00 6.67E+00 2.11E+01 U TM MR 289108023 10/26/2011 Sb-124 .1.58E-01 1.53E+00 5.06E+00 U TM MR 289108023 10/26/2011 Sb-125 -1.85E-01 1.77E+00 5.89E+00 U TM MR 289108023 10/26/2011 Se-75 2.71E+00 1.12E+00 3.15E+00 U TM MR 289108023 10/26/2011 Th-228 1.79E-01 2.30E+00 4.74E+00 U TM MR 289108023 10/26/2011 Zn-65 -3.36E+00 2.21E+00 6.42E+00 U TM MR 289108023 10/26/2011 Zr-95 -9.67E-01 1.29E+00 4.19E+00 U TM SF 289108024 10/26/2011 Ac-228 -1.03E+01 5.96E+00 1.37E+01 U TM SF 289108024 10/26/2011 Ag-108m 1.79E+00 8.56E-01 2.64E+00 U TM SF 289108024 10/26/2011 Ag-ll0m -2.67E+00 1.14E+00 2.73E+00 U TM SF 289108024 10/26/2011 Ba-140 -7.56E-01 1.30E+00 4.07E+00 U TM SF 289108024 10/26/2011 Be-7 1.79E+01 8.43E+00 2.58E+01 U TM SF 289108024 10/26/2011 Ce-141 -8.10E-01 1.16E+00 3.73E+00 U TM SF 289108024 10/26/2011 Ce-144 -1.19E+01 6.27E+00 1.39E+01 U TM SF 289108024 10/26/2011 Co-57 1.65E-01 5.41E-01 1.81E+00 U TM SF 289108024 10/26/2011 Co-58 1.25E-01 9.48E-01 3.18E+00 U TM SF 289108024 10/26/2011 Co-60 2.75E+00 1.29E+00 4.11E+00 U TM SF 289108024 10/26/2011 Cr-51 -5.34E+00 6.87E+00 2.24E+01 U TM SF 289108024 10/26/2011 Cs-134 -1.76E-01 1.16E+00 3.85E+00 U TM SF 289108024 10/26/2011 Cs-137 -4.92E-01 1.23E+00 3.47E+00 U TM SF 289108024 10/26/2011 Fe-59 -9.12E-01 2.43E+00 7.75E+00 U TM SF 289108024 10/26/2011 1-131 4.20E-02 1.85E-01 6.23E-01 U TM SF 289108024 10/26/2011 1-131 2.45E-01 1.25E+00 4.19E+00 U TM SF 289108024 10/26/2011 K-40 1.34E+03 7.36E+01 2.94E+01 TM SF 289108024 10/26/2011 La-140 -7.56E-01 1.30E+00 4.07E+00 U TM SF 289108024 10/26/2011 Mn-54 1.57E-01 9.35E-01 3.13E+00 U TM SF 289108024 10/26/2011 Nb-95 -1.01E-01 8.78E-01 2.93E+00 U TM SF 289108024 10/26/2011 Ru-103 -2.81E+00 1.10E+00 2.55E+00 U D-90

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi!L) (pCi/L)

TM SF 289108024 10/26/2011 Ru-I106 -5.99E+00 8.62E+00 2.67E+01 U TM SF 289108024 10/26/2011 Sb-124 2.33E+00 2.03E+00 6.93E+00 U TM SF 289108024 10/26/2011 Sb-125 5.21E-02 2.1OE+00 6.96E+00 U TM SF 289108024 10/26/2011 Se-75 5.61E-01 1.00E+00 3.21 E+00 U TM SF 289108024 10/26/2011 Th-228 9.48E-01 2.3 1E+00 4.56E+00 U TM SF 289108024 10/26/2011 Zn-65 -4.30E+00 2.76E+00 7.82E+00 U TM SF 289108024 10/26/2011 Zr-95 -5.26E-01 1.86E+00 5.58E+00 U TM LF 289108025 10/26/2011 Ac-228 -1.74E+00 3.60E+00 1.02E+01 U TM LF 289108025 10/26/2011 Ag-108m -3.53E-01 6.20E-01 2.04E+00 U TM LF 289108025 10/26/2011 Ag-I 10m -8.05E-01 7.42E-01 2.29E+00 U TM LF 289108025 10/26/2011 Ba-140 8.86E-02 1.13E+00 3.71E+00 U TM LF 289108025 10/26/2011 Be-7 -8.20E+00 6.11E+00 1.87E+01 U TM LF 289108025 10/26/2011 Ce- 141 1.37E+00 1.48E+00 4.21E+00 U TM LF 289108025 10/26/2011 Ce- 144 -6.08E+00 5.01E+00 1.56E+01 U TM LF 289108025 10/26/2011 Co-57 2.45E-02 6.15E-01 2.05E+00 U TM LF 289108025 10/26/2011 Co-58 1.52E-01 7.44E-01 2.44E+00 U TM LF 289108025 10/26/2011 Co-60 1.78E+00 i .02E+00 3.29E+00 U TM LF 289108025 10/26/2011 Cr-51 -3.57E+00 6.64E+00 2.09E+01 U TM LF 289108025 10/26/2011 Cs-134 -1.54E-01 8.83E-01 2.86E+00 U TM LF 289108025 10/26/2011 Cs-137 -2.88E-01 7.88E-01 2.56E+00 U TM LF 289108025 10/26/2011 Fe-59 -8.26E-01 1.63E+00 5.35E+00 U TM LF 289108025 10/26/2011 1-131 -1.45E+00 1.25E+00 3.73E+00 U TM LF 289108025 10/26/2011 1-131 -4.79E-02 1.81E-01 5.97E-01 U TM LF 289108025 10/26/2011 K-40 1.38E+03 6.94E+01 2.34E+01 TM LF 289108025 10/26/2011 La-140 8.86E-02 1.13E+00 3.71 E+00 U TM LF 289108025 10/26/2011 Mn-54 -8.17E-01 7.84E-01 2.39E+00 U TM' LF 289108025 10/26/2011 Nb-95 9.29E-01 7.97E-01 2.61 E+00 U TM LF 289108025 10/26/2011 Ru-I103 3.49E-01 7.61E-01 2.56E+00 U TM LF 289108025 10/26/2011 Ru-106 4.33E+00 6.28E+00 2.09E+01 U TM LF 289108025 10/26/2011 Sb-124 -2.97E+00 1.77E+00 4.73E+00 U TM LF 289108025 10/26/2011 Sb-125 -1.56E+00 1.97E+00 6.39E+00 U TM LF 289108025 10/26/2011 Se-75 1.04E+00 9.97E-01 3.21 E+00 U TM LF 289108025 10/26/2011 Th-228 -1.67E+00 1.75E+00 4.46E+00 U TM LF 2891"08025 10/26/2011 Zn-65 1.55E+00 1.96E+00 6.60E+00 U TM LF 289108025 10/26/2011 Zr-95 1.93E+00 1.43E+00 4.66E+00 U TM MR 290101023 11/9/2011 Ac-228 6.37E+00 5.16E+00 1.25E+01 U TM MR 290101023 11/9/2011 Ag-108m -7.43E-01 6.91E-01 2.20E+00 U TM MR 290101023 11/9/2011 Ag-110m 5.59E-01 7.82E-01 2.58E+00 U TM MR 290101023 11/9/2011 Ba- 140 2.27E-02 1.06E+00 3.50E+00 U TM MR 290101023 11/9/2011 Be-7 -3.40E+00 6.79E+00 2.23E+01 U TM MR 290101023 11/9/2011 Ce- 141 2.57E-01 1.45E+00 4.62E+00 U TM MR 290101023 11/9/2011 Ce- 144 1.21E+00 5.63E+00 1.81E+01 U TM MR 290101023 11/9/2011 Co-57 -4.81E-01 7.28E-01 2.29E+00 U TM MR 290101023 11/9/2011 Co-58 -5.61E-02 8.05E-01 2.70E+00 U TM MR 290101023 11/9/2011 Co-60 4.40E-01 9.12E-01 3.09E+00 U TM MR 290101023 11/9/2011 Cr-51 4.27E+00 7.47E+00 2.44E+01 U TM MR 290101023 11/9/2011 Cs-134 -7.12E-01 9.96E-01 3.08E+00 U TM MR 290101023 11/9/2011 Cs-137 1.37E+00 9.12E-01 2.92E+00 U TM MR 290101023 11/9/2011 Fe-59 3.62E+00 2.33E+00 7.45E+00 U TM MR 290101023 11/9/2011 1-131 -2.22E-01 1.32E+00 4.26E+00 U TM MR 290101023 11/9/2011 1-131 -2.70E-01 3.03E-01 9.61E-01 U D-91

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 290101023 11/9/2011 K-40 1.83E+03 9.62E+01 2.11E+01 TM MR 290101023 11/9/2011 La-140 2.27E-02 1.06E+00 3.50E+00 U TM MR 290101023 11/9/2011 Mn-54 2.68E-0 1 7.97E-01 2.70E+00 U TM MR 290101023 11/9/2011 Nb-95 2.55E-01 8.69E-01 2.83E+00 U TM MR 290101023 11/9/2011 Ru-I103 1.11E+00 8.3 1E-01 2.72E+00 U TM MR 290101023 11/9/2011 Ru-106 -2.95E+00 6.99E+00 2.26E+01 U TM MR 290101023 .11/9/2011 Sb-124 2.38E+00 1.86E+00 6.24E+00 U TM MR 290101023 11/9/2011 Sb-125 1.05E+00 1.96E+00 6.66E+00 U TM MR 290101023 11/9/2011 Se-75 -6.98E-01 1.07E+00 3.45E+00 U TM MR 290101023 11/9/2011 Th-228 -3.71E+00 2.07E+00 5.27E+00 U TM MR 290101023 11/9/2011 Zn-65 -9.32E-01 2.20E+00 7.07E+00 U TM MR 290101023 11/9/20 11 Zr-95 -1.29E+00 1.59E+00 4.92E+00 U TM SF 290101024 11/9/2011 Ac-228 6.39E+00 3.95E+00 1.25E+01. U TM SF 290101024 11/9/2011 Ag-108m -1.49E+00 8.97E-01 2.63E+00 U TM SF 290101024 11/9/2011 Ag-I l0m 1.90E-01 8.50E-01 2.81E+00 U TM' SF 290101024 11/9/20 11 Ba-140 -2.41E+00 1.30E+00 3.37E-+00 U TM SF 290101024 11/9/2011 Be-7 5.16E+00 7.71E+00 2.56E+01 U TM SF 290101024 11/9/2011 Ce-141 -4.34E+00 2.07E+00 5.64E+00 U TM SF 290101024 11/9/2011 Ce- 144 -1.83E+01 8.32E+00 2.20E+01 U TM SF 290101024 11/9/2011 Co-57 -1.80E+00 1.01E+00 2.90E+00 U TM SF 290101024 11/9/2011 Co-58 9.63E-01 9.71E-01 3.19E+00 U TM SF 290101024 11/9/2011 Co-60 1.81E+00 1.07E+00 3.50E+00 U TM SF 290101024 11/9/2011 Cr-51 -1.12E+01 8.99E+00 2.80E+01 U TM SF 290101024 11/9/2011 Cs-134 -4.39E-01 1.17E+00 3.76E+00 U TM SF 290101024 11/9/2011 Cs-137 -2.37E+00 1.09E+00 2.86E+00 U TM SF 290101024 11/9/2011 Fe-59 1.54E+00 2.20E+00 7.21E+00 U TM SF 290101024 11/9/2011 1-131 -4.46E-02 2.06E-01 6.75E-01 U TM SF 290101024 11/9/2011 1-131 1.07E+00 1.56E+00 5.2 1E+00 U TM SF 290101024 11/9/2011 K-40 1.27E+03 7.34E+01 2.91E+01 TM SF 290101024 11/9/2011 La-140 -2.41E+00 1.29E+00 3.37E+00 U TM SF 290101024 11/9/2011 Mn-54 3.73E-01 9.49E-01 3.12E+00 U TM SF 290101024 11/9/2011 Nb-95 2.25E+00 1.06E+00 3.24E+00 U TM SF 290101024 11/9/2011 Ru-103 -1.67E+00 1.03E+00 3.02E+00 U TM SF 290101024 11/9/2011 Ru-106 -1.22E+01 8.40E+00 2.49E+01 U TM SF 290101024 11/9/2011 Sb-124 -4.99E-01 1.82E+00 5.90E+00 U TM SF 290101024 11/9/2011 Sb-125 -9.68E-01 2.50E+00 8.19E+00 U TM SF 290101024 11/9/2011 Se-75 4.62E-01 1.30E+00 4.35E+00 U TM SF 290101024 11/9/2011 Th-228 4.33E+00 2.53E+00 6.64E+00 U TM SF 290101024 11/9/2011 Zn-65 -2.13E+00 2.36E+00 7.24E+00 U TM SF 290101024 11/9/2011 Zr-95 -1.71E+00 1.73E+00 5.33E+00 U TM LF 290101025 11/9/2011 Ac-228 -7.03E+00 4.87E+00 1.13E+01 U TM LF 290101025 11/9/2011 Ag-108m 6.66E-01 6.34E-01 2.12E+00 U TM LF 290101025 11/9/2011 Ag-II0m 1.71E-01 6.91E-01 2.29E+00 U TM LF 290101025 11/9/2011 Ba- 140 -1.43E+00 9.95E-01 2.71E+00 U TM LF 290101025 11/9/2011 Be-7 -3.98E+00 7.61E+00 1.91E+01 U TM LF 290101025 11/9/2011 Ce-141 -2.18E+00 1.73E+00 4.07E+00 U TM LF 290101025 11/9/2011 Ce- 144 2.70E+00 4.87E+00 1.63E+01 U TM LF 290101025 11/9/2011 Co-57 8.47E-01 6.42E-01 2.1OE+00 U TM LF 290101025 11/9/2011 Co-58 8.29E-01 7.67E-01 2.51E+00 U TM LF 290101025 11/9/2011 Co-60 1.24E-01 8.63E-01 2.85E+00 U TM LF 290101025 11/9/2011 Cr-51 -1.31E+01 7.48E+00 2.1OE+01 U D-92

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM LF 290101025 11/9/2011 Cs-134 -1.04E+00 9.68E-01 2.92E+00 TM LF 290101025 11/9/2011 Cs-137 1.04E+00 8.05E-01 2.63E+00 TM LF 290101025 11/9/2011 Fe-59 5.93E-01 1.57E+00 5.28E+00 TM LF 290101025 11/9/2011 1-131 7. i OE-02 2.20E-01 7.51E-01 TM LF 290101025 11/9/2011 1-131 -1.56E+00 1.24E+00 3.68E+00 TM LF 290101025 11/9/2011 K-40 1.38E+03 6.78E+01 1.77E+01 TM LF 290101025 11/9/2011 La-140 -1.43E+00 9.93E-01 2.71E+00 TM LF 290101025 11/9/2011 Mn-54 -1.73E-01 7.68E-01 2.47E+00 TM LF 290101025 11/9/2011 Nb-95 -1.01E-01 7.65E-01 2.48E+00 TM LF 290101025 11/9/2011 Ru-103 -7.90E-01 7.65E-01 2.41E+00 TM LF 290101025 11/9/2011 Ru-106 5.75E+00 6.87E+00 2.28E+01 TM LF 290101025 11/9/2011 Sb-124 -2.29E+00 1.69E+00 4.69E+00 TM LF 290101025 11/9/2011 Sb-125 -3.92E-01 1.81E+00 6.04E+00 TM LF 290101025 11/9/2011 Se-75 2.45E-01 9.95E-01 3.26E+00 TM LF 290101025 11/9/2011 Th-228 4.OOE+00 2.67E+00 4.93E+00 TM LF 290101025 11/9/2011 Zn-65 5.07E-01 1.85E+00 6.21E+00 TM LF 290101025 11/9/2011 Zr-95 6.99E-01 1.41E+00 4.63E+00 TM MR 290961023 11/23/2011 Ac-228 -6.35E-02 3.16E+00 8.53E+00 TM MR 290961023 11/23/2011 Ag-108m -4.46E-02 4.63E-01. 1.53E+00 TM MR 290961023 11/23/2011 Ag-Il0m -1.05E+00 6.OOE-01 1.66E+00 TM MR 290961023 11/23/2011 Ba-140 -9.18E-01 7.84E-01 2.37E+00 TM MR 290961023 11/23/2011 Be-7 -5.51E+00 4.68E+00 1.43E+01 TM MR 290961023 11/23/2011 Ce-141 1.26E-02 9.84E-01 3.19E+00 TM MR 290961023 11/23/2011 Ce-144 6.54E+00 4.14E+00 1.27E+01 TM MR 290961023 11/23/2011 Co-57 8.99E-02 4.92E-01 1.61E+00 TM MR 290961023 11/23/2011 Co-58 -5.36E-01 5.67E-01 1.80E+00 TM MR 290961023 11/23/2011 Co-60 -1.57E+00 7.86E-01 2.07E+00 TM MR 290961023 11/23/2011 Cr-51 2.34E+00 4.77E+00 1.60E+01 TM MR 290961023 11/23/2011 Cs-134 1.14E+00 7.41E-01 2.42E+00 TM MR 290961023 11/23/2011 Cs-137 1.06E+00 6.48E-01 2.02E+00 TM MR 290961023 11/23/2011 Fe-59 7.61E-01 1.37E+00 4.54E+00 TM MR 290961023 11/23/2011 1-131 -1.41E-01 1.81E-01 5.92E-01 TM MR 290961023 11/23/2011 1-131 -6.51E-01 9.07E-01 2.93E+00 TM MR 290961023 11/23/2011 K-40 1.62E+03 7.87E+01 1.64E+01 TM MR 290961023 11/23/2011 La-140 -9.18E-01 7.83E-01 2.37E+00 TM MR 290961023 11/23/2011 Mn-54 7.33E-01 5.92E-01 1.96E+00 TM MR 290961023 11/23/2011 Nb-95 -1. 18E+00 7.32E-01 1.84E+00 TM MR 290961023 11/23/2011 Ru-103 -6.72E-01 5.80E-01 1.77E+00 TM MR 290961023 11/23/2011 Ru-106 1.89E+00 5.16E+00 1.68E+01 TM MR 290961023 11/23/2011 Sb-124 -1.30E+00 1.07E+00 3.16E+00 TM MR 290961023 11/23/2011 Sb-125 3.06E+00 1.61E+00 4.98E+00 TM MR 290961023 11/23/2011 Se-75 5.63E-01 7.37E-01 2.48E+00 TM MR 290961023 11/23/2011 Th-228 9.99E-01 1.60E+00 3.79E+00 TM MR 290961023 11/23/2011 Zn-65 -1.04E+00 1.42E+00 4.50E+00 TM MR 290961023 11/23/2011 Zr-95 2.07E-01 9.53E-01 3.23E+00 TM SF 290961024 11/23/2011 Ac-228 8.96E-01 3.18E+00 8.23E+00 TM SF 290961024 11/23/2011 Ag-108m 5.5 1E-01 6.04E-01 1.95E+00

-TM SF 290961024 11/23/2011 Ag-Il0m 6.59E-02 6.09E-01 2.04E+00 TM SF 290961024 11/23/2011 Ba- 140 6.16E-02 8.61E-01 2.86E+00 TM SF 290961024 11/23/2011 Be-7 2.99E+00 5.69E+00 1.84E+01 TM SF 290961024 11/23/2011 Ce-I141 2.80E+00 1.72E+00 3.56E+00 D-93

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM SF 290961024 11/23/2011 Ce- 144 -5.39E+00 4.57E+00 1.45E+01 TM SF 290961024 11/23/2011 Co-57 -2.71E-01 5.66E-01 1.89E+00 TM SF 290961024 11/23/2011 Co-58 1.54E-01 5.98E-01 1.98E+00 TM SF 290961024 11/23/2011 Co-60 1.35E+00 7.45E-01 2.39E+00 TM SF 290961024 11/23/2011 Cr-51 -8.36E+00 7.99E+00 2.03E+01 TM SF 290961024 11/23/2011 Cs-134 4.61E-01 7.36E-01 2.44E+00 TM SF 290961024 11/23/2011 Cs-137 -4.86E-01 6.48E-01 2.09E+00 TM SF 290961024 11/23/2011 Fe-59 -1.54E-01 1.50E+00 4.87E+00 TM SF 290961024 11/23/2011 1-131 3.92E-02 2.11E-01 6.95E-01 TM SF 290961024 11/23/2011 1-131 -2.46E+00 1.23E+00 3.41E+00 TM SF 290961024 11/23/2011 K-40 1.49E+03 7.00E+01 1.82E+01 TM SF 290961024 11/23/2011 La-140 6.16E-02 8.61E-01 2.86E+00 TM SF 290961024 11/23/2011 Mn-54 -5.5 IE-01 6.30E-01 1.99E+00 TM SF 290961024 11/23/2011 Nb-95 6.94E-01 6.40E-01 2.11E+00 TM SF 290961024 11/23/2011 Ru-103 -2.22E+00 8.44E-01 1.94E+00 TM SF 290961024 11/23/2011 Ru-I106 -3.62E+00 5.54E+00 1.80E+01 TM SF 290961024 11/23/2011 Sb-124 -1.29E+00 1.32E+00 4.02E+00 TM SF 290961024 11/23/2011 Sb-125 2.91E-01 1.73E+00 5.63E+00 TM SF 290961024 11/23/2011 Se-75 1.06E-01 8.89E-01 2.94E+00 TM SF 290961024 11/23/2011 Th-228 2.70E-01 1.77E+00 4.66E+00 TM SF 290961024 11/23/2011 Zn-65 2.10E-01 1.50E+00 4.88E+00 TM SF 290961024 11/23/2011 Zr-95 -2.52E+00 1.24E+00 3.38E+00 TM LF 290961025 11/23/2011 Ac-228 1.02E+00 6.27E+00 1.20E+01 TM LF 290961025 11/23/2011 Ag-108m 9.07E-02 6.75E-01 2.19E+00 TM LF 290961025 11/23/2011 Ag-il0m -4.04E-01 7.56E-01 2.45E+00 TM LF 290961025 11/23/2011 Ba- 140 -1.35E+00 1.16E+00 3.50E+00 TM LF 290961025 11/23/2011 Be-7 1.79E-01 6.32E+00 2.03E+01 TM LF 290961025 11/23/2011 Ce- 141 1.5]E+00 1.44E+00 4.11E+00 TM LF 290961025 11/23/2011 Ce- 144 -4.63E+00 4.93E+00 1.54E+01 TM LF 290961025 11/23/2011 Co-57 9.24E-01 6.69E-01 2.11E+00 TM LF 290961025 11/23/2011 Co-58 -1.84E-01 8.08E-01 2.61E+00 TM LF 290961025 11/23/2011 Co-60 4.49E-01 8.18E-01 2.70E+00 TM LF 290961025 11/23/2011 Cr-51 -1.14E+01 7.30E+00 2.18E+01 TM LF 290961025 11/23/2011 Cs-134 -2.48E-02 9.16E-01 2.98E+00 TM LF 290961025 11/23/2011 Cs-137 1.22E+00 8.70E-01 2.81E+00 TM LF 290961025 11/23/2011 Fe-59 2.08E+00 1.83E+00 6.02E+00 TM LF 290961025 11/23/2011 1-131 -1.35E+00 1.27E+00 3.92E+00 TM LF 290961025 11/23/2011 1-131 -6.26E-02 2.15E-01 7.26E-01 TM LF 290961025 11/23/2011 K-40 1.43E+03 7.OOE+01 2.53E+01 TM LF 290961025 11/23/2011 La-140 -1.35E+00 1.16E+00 3.50E+00 TM LF 290961025 11/23/2011 Mn-54 -2.20E+00 9.24E-01 2.27E+00 TM LF 290961025 11/23/2011 Nb-95 -1.29E+00 1.36E+00 2.69E+00 TM LF 290961025 11/23/2011 Ru-103 -4.94E-02 7.62E-01 2.57E+00 TM LF 290961025 11/23/2011 Ru-106 9.38E+00 6.92E+00 2.26E+01 TM LF 290961025 11/23/2011 Sb-124 1.24E+00 1.77E+00 5.96E+00 TM LF 290961025 11/23/2011 Sb-125 -7.18E-01 2.OOE+00 6.38E+00 TM LF 290961025 11/23/2011 Se-75 -1.68E+00 1.02E+00 3.06E+00 TM LF 290961025 11/23/2011 Th-228 1.16E+00 2.14E+00 4.63E+00 TM LF 290961025 11/23/2011 Zn-65 -6.32E+00 2.49E+00 6.06E+00 TM LF 290961025 11/23/2011 Zr-95 4.81E-01 1.34E+00 4.40E+00 TM MR 291748023 12/7/2011 Ac-228 8.08E+00 7.75E+00 1.07E+01 D-94

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 291748023 12/7/2011 Ag-108m -8.67E-01 6.40E-01 1.87E+00 U TM MR 291748023 12/712011 Ag-Il0m -1.76E+00 8.03E-01 2.11E+00 U TM MR 291748023 12/7/2011 Ba- 140 -1.97E+00 1.73E+00 3.06E+00 U TM MR 291748023 12/7/2011 Be-7 2.23E+00 5.97E+00 2.02E+01 U TM MR 291748023 12/712011 Ce- 141 -5.82E-01 1.24E+00 3.89E+00 U TM MR 291748023 12/7/2011 Ce-I144 1.25E+00 4.93E+00 1.57E+01 U TM MR 291748023 12/7/2011 Co-57 6.62E-01 6.47E-01 2.04E+00 U TM MR 291748023 12/7/2011 Co-58 -2.55E-02 7.29E-01 2.36E+00 U TM MR 291748023 12/7/2011 Co-60 4.07E-01 7.97E-01 2.63E+00 U TM MR 291748023 12/7/2011 Cr-51 9.35E-01 6.29E+00 2.06E+01 U TM MR 291748023 12/7/2011 Cs-134 5.08E-01 8.69E-01 2.84E+00 U TM MR 291748023 12/7/2011 Cs-137 2.22E+00 9.15E-01 2.67E+00 U TM MR 291748023 12/7/2011 Fe-59 2.80E-01 1.66E+00 5.51E+00 U TM MR 291748023 12/7/2011 1-131 -2.44E-01 1.08E+00 3.48E+00 U TM MR 291748023 12/7/2011 1-131 2.62E-01 3.90E-01 1.29E+00 U DL TM MR 291748023 12/7/2011 K-40 1.54E+03 7.68E+01 2.14E+01 TM MR 291748023 12/7/2011 La-140 -1.97E+00 1.73E+00 3.06E+00 TM MR 291748023 12/7/2011 Mn-54 1.38E+00 7.88E-01 2.45E+00 TM MR 291748023 12/7/2011 Nb-95 1.67E-01 8.57E-01 2.39E+00 TM MR 291748023 12/7/2011 Ru-103 -9.17E-01 7.41E-01 2.30E+00 TM MR 291748023 12/7/2011 Ru-106 -4.49E+00 6.28E+00 2.01E+01 TM MR 291748023 12/7/2011 Sb-124 -7.89E-01 1.49E+00 4.75E+00 TM MR 291748023 12/7/2011 Sb-125 4.47E-01 1.87E+00 6.03E+00 TM MR 291748023 12/7/2011 Se-75 1.45E+00 1.01E+00 3.22E+00 TM MR 291748023 12/7/2011 Th-228 -5.19E+00 2.811E+00 5.94E+00 TM MR 291748023 12/7/2011 Zn-65 3.84E-02 1.77E+00 5.85E+00 TM MR 291748023 12/7/2011 Zr-95 2.76E-01 1.24E+00 4.07E+00 TM SF 291748024 12/7/2011 Ac-228 1.08E+00 4.57E+00 8.34E+00 TM SF 291748024 12/7/2011 Ag-108m -9.87E-02 4.75E-01 1.54E+00 TM SF 291748024 12/7/2011 Ag-I l0m -4.22E-01 5.18E-01 1.68E+00 TM SF 291748024 12/7/2011 Ba- 140 5.08E-01 7.05E-01 2.38E+00 TM SF 291748024 12/7/2011 Be-7 -7.89E-01 4.53E+00 1.47E+01 TM SF 291748024 12/7/2011 Ce- 141 -1.82E-01 9.71E-01 3.10E+00 TM SF 291748024 12/7/2011 Ce- 144 -9.90E-01 3.74E+00 1.20E+01 TM SF 291748024 12/7/2011 Co-57 -2.45E-01 6.45E-01 1.62E+00 TM SF 291748024 12/7/2011 Co-58 -1.16E+00 6.18E-01 1.74E+00 TM SF 291748024 12/7/2011 Co-60 1.80E-01 6.14E-01 2.08E+00 TM SF 291748024 12/7/2011 Cr-51 1.40E-01 4.90E+00 1.63E+01 TM SF 291748024 12/7/2011 Cs-134 2.96E-01 6.69E-01 2.24E+00 TM SF 291748024 12/7/2011 Cs-137 -1.18E+00 8.77E-01 1.94E+00 TM SF 291748024 12/7/2011 Fe-59 1.94E+00 1.37E+00 4.36E+00 TM SF 291748024 12/7/2011 1-131 -2.97E-01 8.58E-01 2.81E+00 TM SF 291748024 12/7/2011 1-131 -6.03E-02 2.16E-01 7.13E-01 TM SF 291748024 12/7/2011 K-40 1.40E+03 6.52E+01 1.71E+01 TM SF 291748024 12/7/2011 La-140 5.08E-01 7.05E-01 2.38E+00 TM SF 291748024 12/7/2011 Mn-54 -1.09E+00 6.07E-01 1.73E+00 TM SF 291748024 12/7/2011 Nb-95 1.54E-01 5.14E-01 1.72E+00 TM SF 291748024 12/7/2011 Ru-103 -5.60E-01 6.04E-01 1.87E+00 TM SF 291748024 12/7/2011 Ru-106 -2.75E-01 5.06E+00 1.62E+01 TM SF 291748024 12/7/2011 Sb-124 -4.77E-01 1.15E+00 3.69E+00 TM SF 291748024 12/7/2011 Sb-125 -1.59E+00 1.48E+00 4.57E+00 D-95

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCiL) (pCi/L)

TM SF 291748024 12/7/2011 Se-75 -6.69E-01 7.47E-01 2.42E+00 U TM SF 291748024 12/7/2011 Th-228 2.63E+00 1.84E+00 3.76E+00 U TM SF 291748024 12/7/2011 Zn-65 1.13E+00 1.39E+00 4.54E+00 U TM SF 291748024 12/7/2011 Zr-95 1.20E+00 9.59E-01 3.17E+00 U TM LF 291748025 12/7/2011 Ac-228 7.88E-01 5.19E+00 1.46E+01 U TM LF 291748025 12/7/2011 Ag-108m -1.45E+00 9.81E-01 2.29E+00 U TM LF 291748025 12/7/2011 Ag-Il0m -7.23E-01 8.53E-01 2.71E+00 U TM LF 291748025 12/7/2011 Ba-140 -1.24E+00 1.27E+00 3.76E+00 U TM LF 291748025 12/7/2011 Be-7 -1.97E-01 6.84E+00 2.20E+01 U TM LF 291748025 12/7/2011 Ce- 141 -2.86E+00 1.92E+00 4.14E+00 U TM LF 291748025 12/7/2011 Ce-I144 -1.96E+00 4.88E+00 1.55E+01 U TM LF 291748025 12/7/2011 Co-57 -2.79E-01 6.40E-01 2.04E+00 U TM LF 291748025 12/7/2011 Co-58 -9.82E-01 8.88E-01 2.68E+00 U TM LF 291748025 12/7/2011 Co-60 8.76E-01 1.03E+00 3.47E+00 U TM LF 291748025 12/7/2011 Cr-51 -1.09E+01 7.54E+00 2.25E+01 U TM LF 291748025 12/7/2011 Cs-134 -2.68E-01 1.06E+00 3.45E+00 U TM LF 291748025 12/7/2011 Cs-137 -2.OOE-01 9.17E-01 3.02E+00 U TM LF 291748025 12/7/2011 Fe-59 1.35E+00 2.23E+00 7.53E+00 U TM LF 291748025 12/7/2011 1-131 1.38E-01 2.59E-01 8.51E-01 U TM LF 291748025 12/7/2011 1-131 -7.60E-01 1.33E+00 4.23E+00 U TM LF 291748025 12/7/2011 K-40 1.45E+03 7.47E+01 2.66E+01 TM LF 291748025 12/7/2011 La-140 -1.24E+00 1.27E+00 3.76E+00 U TM LF 291748025 12/7/2011 Mn-54 1.1OE-01 8.93E-01 2.93E+00 U TM LF 291748025 12/7/2011 Nb-95 -1.87E-01 9.1OE-01 2.97E+00 U TM LF 291748025 12/7/2011 Ru-103 -3.68E-01 8.76E-01 2.76E+00 U TM LF 291748025 12/7/2011 Ru-106 2.60E+00 7.59E+00 2.55E+01 U TM LF 291748025 12/7/2011 Sb-124 -5.83E-01 1.97E+00 6.22E+00 U TM LF 291748025 12/7/2011 Sb-125 -2.11E+00 2.24E+00 6.86E+00 U TM LF 291748025 12/7/2011 Se-75 -7.19E-01 1.06E+00 3.43E+00 U TM LF 291748025 12/7/2011 Th-228 6.01E-01 2.34E+00 5.54E+00 U TM LF 291748025 12/7/2011 Zn-65 -3.46E+00 2.33E+00 6.91E+00 U TM LF 291748025 12/7/2011 Zr-95 -8.80E-01 1.60E+00 5.11E+00 U TM MR 292714023 12/21/2011 Ac-228 -1.45E+00 4.71E+00 1.18E+01 U TM MR 292714023 12/21/2011 Ag-108m -4.73E-01 7.29E-01 2.28E+00 U TM MR 292714023 12/21/2011 Ag-i 10m 1.04E+00 8.39E-01 2.43E+00 U TM MR 292714023 12/21/2011 Ba-140 2.87E-01 1.58E+00 4.71E+00 U TM MR 292714023 12/21/2011 Be-7 5.73E+00 7.18E+00 2.31E+01 U TM MR 292714023 12/21/2011 Ce-141 5.36E-01 2.09E+00 4.84E+00 U TM MR 292714023 12/21/2011 Ce-144 5.07E+00 5.44E+00 1.73E+01 U TM MR 292714023 12/21/2011 Co-57 -9.53E-02 6.87E-01 2.21E+00 U TM MR 292714023 12/21/2011 Co-58 -1.84E-01 8.33E-01 2.69E+00 U TM MR 292714023 12/21/2011 Co-60 1.83E+00 1.03E+00 3.30E+00 U TM MR .292714023 12/21/2011 Cr-51 -2.16E+00 7.64E+00 2.49E+01 U TM MR 292714023 12/21/2011 Cs-134 7.41E-01 1.02E+00 3.34E+00 U TM MR 292714023 12/21/2011 Cs-137 5.27E+00 1.44E+00 2.70E+00 UI M TM MR 292714023 12/21/2011 Fe-59 3.06E+00 1.97E+00 6.42E+00 U TM MR 292714023 12/21/2011 1-131 -2.64E-01 2.43E-01 7.60E-01 U TM MR 292714023 12/21/2011 1-131 -1.22E+00 1.75E+00 5.55E+00 U TM MR 292714023 12/21/2011 K-40 1.34E+03 7.22E+01 2.15E+01 TM MR 292714023 12/21/2011 La-140 2.87E-01 1.58E+00 4.71E+00 U TM MR 292714023 12/21/2011 Mn-54 2.27E-01 8.10E-01 2.65E+00 U D-96

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

TM MR 292714023 12/21/2011 Nb-95 2.05E-01 7.68E-01' 2.53E+00 U TM MR 292714023 12/21/2011 Ru-103 -1.98E+00 9.26E-01 2.52E+00 U TM MR 292714023 12/21/2011 Ru-106 -7.91E+00 7.02E+00 2.17E+01 U TM MR 292714023 12/21/2011 Sb-124 -4.29E+00 2.07E+00 5.20E+00 U TM MR 292714023 12/21/2011 Sb-125 -1.24E+00 2.15E+00 6.77E+00 U TM MR 292714023 12/21/2011 Se-75 -1.24E+00 1.09E+00 3.41E+00 U TM MR 292714023 12/21/2011 Th-228 -1.69E+00 2.27E+00 5.14E+00 U TM MR 292714023 12/21/2011 Zn-65 -2.47E+00 2.37E+00 6.25E+00 U TM MR 292714023 12/21/2011 Zr-95 9.22E-01 1.44E+00 4.75E+00 U TM SF 292714024 12/21/2011 Ac-228 8.28E+00 4.33E+00 1.11E+01 U TM SF 292714024 12/21/2011 Ag-108m 3.24E-01 5.98E-01 i .95E+00 U fM SF 292714024 12/21/2011 Ag-ll0m -2.70E+00 9.37E-01 2.05E+00 U TM SF 292714024 12/21/2011 Ba- 140 -8.53E-01 1.16E+00 3.55E+00 U TM SF 292714024 12/21/2011 Be-7 2.85E+00 6.17E+00 2.OOE+01 U TM SF 292714024 12/21/2011 Ce- 141 -8.53E-01 1.21E+00 3.78E+00 U TM SF 292714024 12/21/2011 Ce- 144 -4.20E+00 4.67E+00 1.45E+01 U TM SF 292714024 12/21/2011 Co-57 4.92E-01 5.61E-01 1.80E+00 U TM SF 292714024 12/21/2011 Co-58 1.06E-02 7.13E-01 2.33E+00 U TM SF 292714024 12/21/2011 Co-60 1.91E-01 8.09E-01 2.68E+00 U TM SF 292714024 12/21/2011 Cr-51 1.07E+00 6.47E+00 2.14E+01 U TM SF 292714024 12/21/2011 Cs-134 1.38E+00 9.27E-01 2.98E+00 U TM SF 292714024 12/21/2011 Cs-137 -9.82E-01 1.16E+00 2.72E+00 U TM SF 292714024 12/21/2011 Fe-59 -2.25E+00 1.84E+00 5.67E+00 U TM SF 292714024 12/21/2011 1-131 1.27E-01 2.11E-01 6.93E-01 U TM SF 292714024 12/21/2011 1-131 -4.20E-01 1.38E+00 4.46E+00 U TM SF 292714024 12/21/2011 K-40 1.38E+03 6.75E+01 2.1IE+01 TM SF 292714024 12/21/2011 La-140 -8.53E-01 1.16E+00 3.55E+00 U TM SF 292714024 12/21/2011 Mn-54 5.98E-01 6.91E-01 2.27E+00 U TM SF 292714024 12/21/2011 Nb-95 1.06E+00 7.71E-01 2.50E+00 U TM SF 2927,14024 12/21/2011 Ru-103 -5.19E-01 7.39E-01 2.29E+00 U TM SF 292714024 12/21/2011 Ru-106 -8.88E+00 6.37E+00 1.93E+01 U TM SF 292714024 12/21/2011 Sb-124 3.3 1E-01 1.47E+00 4.96E+00 U TM SF 292714024 12/21/2011 Sb-125 2.60E+00 1.92E+00 6.1OE+00 U TM SF 292714024 12/21/2011 Se-75 -8.67E-01 9.27E-01 2.97E+00 U TM SF 292714024 12/21/2011 Th-228 -1.48E+00 1.71E+00 4.61E+00 U TM SF 292714024 12/21/2011 Zn-65 -1.96E+00 1.79E+00 5.55E+00 U TM SF 292714024 12/21/2011 Zr-95 -4.01E-01 1.30E+00 4.22E+00 U TM LF 292714025 12/21/2011 Ac-228 -2.70E+00 3.96E+00 1.09E+01 U TM LF 292714025 12/21/2011 Ag-108m -5.80E-01 7.09E-01 2.18E+00 U TM LF 292714025 12/21/2011 Ag-Il0m -3.83E-01 7.50E-01 2.41E+00 U TM LF 292714025 12/21/2011 Ba- 140 -2.49E-01 1.22E+00 4.03E+00 U TM LF 292714025 12/21/2011 Be-7 2.3 1E+00 8.67E+00 2.25E+01 U TM LF 292714025 12/21/2011 Ce- 141 3.06E-01 1.58E+00 4.77E+00 U TM LF 292714025 12/21/2011 Ce- 144 -7.89E+00 5.89E+00 1.73E+01 U TM LF 292714025 12/21/2011 Co-57 1.57E+00 7.85E-01 2.30E+00 U TM LF 292714025 12/21/2011 Co-58 -1.45E+00 8.64E-01 2.40E+00 U TM LF 292714025 12/21/2011 Co-60 4.56E-01 8.48E-01 2.81E+00 U TM LF 292714025 12/21/2011 Cr-51 7.50E+00 7.64E+00 2.48E+01 U TM LF 292714025 12/21/2011 Cs-134 -9.24E-01 9.72E-01 2.97E+00 U TM LF 292714025 12/21/2011 Cs-137 2.45E-01 8.15E-01 2.70E+00 U TM LF 292714025 12/21/2011 Fe-59 -5.10E-01 1.95E+00 6.40E+00 U D-97

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi!L) (pCi/L)

TM LF 292714025 12/21/2011 1-131 9.59E-02 1.86E-01 6.27E-01 U TM LF 292714025 12/21/2011 1-131 1.87E+00 1.67E+00 5.36E+00 U TM LF 292714025 12/21/2011 K-40 1.46E+03 7.48E+01 2.57E+01 TM LF 292714025 12/21/2011 La-140 -2.49E-01 1.22E+00 4.03E+00 U TM LF 292714025 12/21/2011 Mn-54 1.30E-01 8.06E-01 2.62E+00 U TM LF 292714025 12/21/2011 Nb-95 1.33E+00 8.69E-01 2.77E+00 U TM LF 292714025 12/21/2011 Ru-103 -2.69E-01 8.21E-01 2.72E+00 U TM LF 292714025 12/21/2011 Ru-106 2.26E+00 7.07E+00 2.35E+01 U TM LF 292714025 12/21/2011 Sb-124 -2.82E+00 1.65E+00 4.39E+00 U TM LF 292714025 12/21/2011 Sb-125 -2.82E+00 2.28E+00 6.74E+00 U TM LF 292714025 12/21/2011 Se-75 -1.20E+00 1.04E+00 3.23E+00 U TM LF 292714025 12/21/2011 Th-228 4.28E-01 2.77E+00 6.71E+00 U TM LF 292714025 12/21/2011 Zn-65 -2.02E+00 1.96E+00 6.06E+00 U TM LF 292714025 12/21/2011 Zr-95 -4.14E-01 1.37E+00 4.41E+00 U D-98

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3-V 278897001 5/24/2011 Ac-228 -2.76E+01 1.80E+01 3.28E+0 1 U TV ONS3-V 278897001 5/24/2011 Ag-108m 2.68E-01 1.60E+00 5.3 1E+00 U TV ONS3-V 278897001 5/24/2011 Ag-il0m -4.54E-01 2.26E+00 7.20E+00 U TV ONS3-V 278897001 5/24/2011 Ba-140 1.11E+00 5.84E+00 1.94E+01 U TV ONS3-V 278897001 5/24/2011 Be-7 7.91E+02 5.34E+01 6.01E+01 TV ONS3-V 278897001 5/24/2011 Ce- 141 -5.29E+00 3.07E+00 9.05E+00 U TV ONS3-V 278897001 5/24/2011 Ce- 144 -6.45E+00 8.57E+00 2.77E+01 U TV ONS3-V 278897001 5/24/2011 Co-57 1.02E+00 1.09E+00 3.61 E+00 U TV ONS3-V 278897001 5/24/2011 Co-58 1.37E+00 2.50E+00 8.37E+00 U TV ONS3-V 278897001 5/24/2011 Co-60 6.82E+00 3.04E+00 9.38E+00 U TV ONS3-V 278897001 5/24/2011 Cr-51 4.81E+00 2.OOE+01 6.78E+01 U TV ONS3-V 278897001 5/24/2011 Cs-134 -2.28E-01 2.58E+00 8.61 E+00 U TV ONS3-V 278897001 5/24/2011 Cs-137 2.82E-01 2.33E+00 7.47E+00 U TV ONS3-V 278897001 5/24/2011 Fe-59 -7.75E-01 6.50E+00 2.10E+01 U TV ONS3-V 278897001 5/24/2011 1-131 4.41E+00 7.47E+00 2.51E+01 U TV ONS3-V 278897001 5/24/2011 K-40 3.89E+03 1.92E+02 7.34E+01 TV ONS3-V 278897001 5/24/2011 La-140 1.11E+00 5.84E+00 1.94E+01 U TV ONS3-V 278897001 5/24/2011 Mn-54 -7.32E-01 2.13E+00 7.01E+00 U TV ONS3-V 278897001 5/24/2011 Nb-95 -5.11E-01 2.48E+00 8.27E+00 U TV ONS3-V 278897001 5/24/2011 Ru-103 -1.15E+00 2.48E+00 7.99E+00 U TV ONS3-V 278897001 5/24/2011 Ru-106 -2.07E+00 1.90E+01 6.10E+01 U TV ONS3-V 278897001 5/24/2011 Sb-124 -7.61E+00 4.83E+00 1.30E+01 U TV ONS3-V 278897001 5/24/2011 Sb-125 2.96E-01 4.84E+00 1.61E+01 U TV ONS3-V 278897001 5/24/2011 Se-75 -4.63E+00 3.68E+00 7.46E+00 U TV ONS3-V 278897001 5/24/2011 Th-228 -5.60E-01 4.73E+00 1.19E+01 U TV ONS3-V 278897001 5/24/2011 Zn-65 -6.64E+00 6.3 1E+00 1.93E+01 U TV ONS3-V 278897001 5/24/2011 Zr-95 -4.80E+00 6.33E+00 1.51E+01 U TV ONS3-V 278897002 5/24/2011 Ac-228 -2.32E+00 9.29E+00 2.34E+01 U TV ONS3-V 278897002 5/24/2011 Ag-108m -1.77E+00 1.45E+00 4.54E+00 U TV ONS3-V 278897002 5/24/2011 Ag-I 10m -7.40E-01 1.79E+00 4.97E+00 U TV ONS3-V 278897002 5/24/2011 Ba-140 -2.55E+00 4.12E+00 1.29E+01 U TV ONS3-V 278897002 5/24/2011 Be-7 1.06E+03 5.92E+01 5.14E+01 TV ONS3-V 278897002 5/24/2011 Ce- 141 1.05E+01 4.11E+00 1.12E+01 U TV ONS3-V 278897002 5/24/2011 Ce-144 1.92E+00 9.89E+00 3.26E+01I U TV ONS3-V 278897002 5/24/2011 Co-57 4.55E-01 1.29E+00 4.28E+00 U TV ONS3-V 278897002 5/24/2011 Co-58 -3.06E-01 1.77E+00 5.69E+00 U TV ONS3-V 278897002 5/24/2011 Co-60 2.85E+00 1.92E+00 6.16E+00 U TV ONS3-V 278897002 5/24/2011 Cr-51 2.42E+01 1.97E+01 6.47E+01 U TV ONS3-V 278897002 5/24/2011 Cs-134 4.75E+00 2.30E+00 6.85E+00 U TV ONS3-V 278897002 5/24/2011 Cs-137 1.26E+01 2.40E+00 5.56E+00 M TV QNS3-V 278897002 5/24/2011 Fe-59 4.90E+00 4.38E+00 1.44E+01 U TV ONS3-V 278897002 5/24/2011 1-131 2.OOE+00 6.55E+00 2.20E+01 U TV ONS3-V 278897002 5/24/2011 K-40 4.OOE+03 2.18E+02 5.12E+01 TV ONS3-V 278897002 5/24/2011 La-140 -2.55E+00 4.12E+00 1.29E+01 U TV ONS3-V 278897002 5/24/2011 Mn-54 -1.29E+00 1.70E+00 5.28E+00 U TV ONS3-V 278897002 5/24/2011 Nb-95 1.29E+00 1.91E+00 6.19E+00 U TV ONS3-V 278897002 5/24/2011 Ru-103 1.14E+00 1.91E+00 6.33E+00 U TV ONS3-V 278897002 5/24/2011 Ru-106 -3.67E+00 1.47E+01 4.78E+01 U TV ONS3-V 278897002 5/24/2011 Sb-124 4.48E-01 3.91E+00 1.27E+01 U TV ONS3-V 278897002 5/24/2011 Sb-125 1.25E+00 4.26E+00 1.42E+01 U TV ONS3-V 278897002 5/24/2011 Se-75 -2.69E+00 2.41E+00 7.35E+00 U D-99

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3-V 278897002 5/24/2011 Th-228 -5.56E+00 4.74E+00 1.09E+01 TV ONS3-V 278897002 5/24/2011 Zn-65 3.25E+00 4.98E+00 1.43E+01 TV ONS3-V 278897002 5/24/2011 Zr-95 -9.89E-01 3.23E+00 1.04E+01 TV ONS3-V 278897003 5/24/2011 Ac-228 6.5 1E+01 1.81E+01 2.60E+01 TV ONS3-V 278897003 5/24/2011 Ag-108m -3.32E+00 1.95E+00 5.58E+00 TV ONS3-V 278897003 5/24/2011 Ag-Il0m -2.80E+00 2.43E+00 6.54E+00 TV ONS3-V 278897003 5/24/2011 Ba-140 4.88E-01 6.33E+00 2.08E+01 TV ONS3-V 278897003 5/24/2011 Be-7 1.11 E+03 6.87E+01 6.70E+01 TV ONS3-V 278897003 5/24/2011 Ce- 141 -2.46E+00 3.81E+00 1.20E+01 TV ONS3-V 278897003 5/24/2011 Ce-i144 9.37E+00 1.19E+01 3.83E+01 TV ONS3-V 278897003 5/24/2011 Co-57 -4.87E-01 1.50E+00 4.82E+00 TV ONS3-V 278897003 5/24/2011 Co-58 -1.60E+00 2.27E+00 7.23E+00 TV ONS3-V 278897003 5/24/2011 Co-60 5.91E+00 3.46E+00 8.53E+00 TV ONS3-V 278897003 5/24/2011 Cr-51 -2.57E+00 2.39E+01 7.93E+01 TV ONS3-V 278897003 5/24/2011 Cs-134 7.46E+00 3.06E+00 8.94E+00 TV ONS3-V 278897003 5/24/2011 Cs-137 5.91E+01 6.111E+00 6.63E+00 TV ONS3-V 278897003 5/24/2011 Fe-59 1.62E+01 7.06E+00 2.07E+01 TV ONS3-V 278897003 5/24/2011 1-131 7.45E+00 9.16E+00 3.01E+01 TV ONS3-V 278897003 5/24/2011 K-40 4.3 1E+03 2.34E+02 6.41 E+01 TV ONS3-V 278897003 5/24/2011 La-140 4.88E-01 6.33E+00 2.08E+01 TV ONS3-V 278897003 5/24/2011 Mn-54 -2.28E+00 2.12E+00 6.55E+00 TV ONS3-V 278897003 5/24/2011 Nb-95 -6.45E-01 2.28E+00 7.46E+00 TV ONS3-V 278897003 5/24/2011 Ru-103 -3.52E+00 2.70E+00 8.01E+00 TV ONS3-V 278897003 5/24/2011 Ru-106 -4.90E+00 1.77E+01 5.89E+01 TV ONS3-V 278897003 5/24/2011 Sb-124 -1.47E+00 4.77E+00 1.52E+01 TV ONS3-V 278897003 5/24/2011 Sb-125 -1.53E+01 6.62E+00 1.71E+01 TV ONS3-V 278897003 5/24/2011 Se-75 -2.50E+00 2.80E+00 9.06E+00 TV ONS3-V 278897003 5/24/2011 Th-228 5.41E+00 6.42E+00 1.12E+01 TV ONS3-V 278897003 5/24/2011 Zn-65 -5.49E-01 5.47E+00 1.75E+01 TV ONS3-V 278897003 5/24/2011 Zr-95 -2.36E+00 4.23E+00 1.37E+01 TV ONS1-V 278897004 5/24/2011 Ac-228 -1.79E+01 1.88E+01 4.711E+01 TV ONS1-V 278897004 5/24/2011 Ag-108m -2.06E+00 2.58E+00 8.05E+00 TV ONS1-V 278897004 5/24/2011 Ag-Il0m -5.44E+00 3.34E+00 9.70E+00 TV. ONS 1-V 278897004 5/24/2011 Ba-140 -3.84E+00 1.18E+01 3.86E+01 TV ONS1-V 278897004 5/24/2011 Be-7 9.50E+02 7.27E+01 9.67E+01 TV ONS 1-V 278897004 5/24/2011 Ce- 141 -4.36E+00 5.79E+00 1.84E+01 TV ONS1-V 278897004 5/24/2011 Ce- 144 -6.04E+00 1.63E+01 5.32E+01 TV ONSI-V 278897004 5/24/2011 Co-57 -1.101E+00 2.13E+00 6.93E+00 TV ONS 1-V 278897004 5/24/2011 Co-58 2.53E-02 3.63E+00 1.19E+0 1 TV ONSI-V 278897004 5/24/2011 Co-60 7.66E+00 4.01E+00 1.28E+01 TV ONSI-V 278897004 5/24/2011 Cr-51 -5.95E+01 3.87E+01 1.16E+02 TV ONSI-V 278897004 5/24/2011 Cs-134 2.12E-01 3.74E+00 1.23E+01 TV ONS1-V 278897004 5/24/2011 Cs-137 4.80E+00 3.58E+00 1.18E+01 TV ONS1-V 278897004 5/24/2011 Fe-59 9.48E+00 9.05E+00 3.03E+01 TV ONSI-V 278897004 5/24/2011 1-131 9.88E+00 1.61E+01 5.34E+01 TV ONS1-V 278897004 5/24/2011 K-40 2.82E+03 1.87E+02 1.16E+02

.TV ONSI-V 278897004 5/24/2011 La-140 -3.84E+00 1.18E+0 1 3.86E+01 TV ONSI-V 278897004 5/24/2011 Mn-54 1.61E-01 3.14E+00 1.03E+01 TV ONSI-V 278897004 5/24/2011 Nb-95 1.60E+00 5.75E+00 1.33E+01 TV ONSI-V 278897004 5/24/2011 Ru-103 -5.26E+00 4. 101E+00 1.20E+01 TV ONSI-V 278897004 5/24/2011 Ru-106 -1.98E+01 2.87E+01 9.29E+01 D-100

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS 1-V 278897004 5/24/2011 Sb-124 -4.85E+00 8.03E+00 2.54E+01 U TV ONS 1-V 278897004 5/24/2011 Sb-125 -7.63E+00 7.99E+00 2.47E+01 U TV ONS1-V 278897004 5/24/2011 Se-75 4.56E+00 3.89E+00 1.29E+01 U TV ONSI-V 278897004 5/24/2011 Th-228 -4.54E+00 6.53E+00 1.77E+01 U TV ONS 1-V 278897004 5/24/2011 Zn-65 -1.42E+01 8.92E+00 2.59E+01 U TV ONS I-V 278897004 5/24/2011 Zr-95 1.38E+00 6.47E+00 2.14E+01 U TV ONS I-V 278897005 5/24/2011 Ac-228 -3.01E+00 1.20E+01 2.79E+01 U TV ONSI-V 278897005 5/24/2011 Ag-108m -1.44E+00 1.65E+00 5.08E+00 U TV ONS I-V 278897005 5/24/2011 Ag-Il0m -5.99E+00 2.29E+00 5.47E+00 U TV ONS I-V 278897005 5/24/2011 Ba-140 1.36E+00 5.18E+00 1.74E+01 U TV ONS I-V 278897005 5/24/2011 Be-7 1.99E+03 1.02E+02 5.97E+01 TV ONS I-V 278897005 5/24/2011 Ce- 141 3.21E+00 6.20E+00 1.16E+01 U TV ONS I-V 278897005 5/24/2011 Ce-144 -4.27E+00 1.13E+01 3.55E+01 U TV ONS I-V 278897005 5/24/2011 Co-57 6.50E-01 1.48E+00 4.73E+00 U TV ONS I-V 278897005 5/24/2011 Co-58 -3.44E-01 2.13E+00 6.87E+00 U TV ONS I-V 278897005 5/24/2011 Co-60 1.88E+00 2.16E+00 7.11E+00 U TV ONS 1-V 278897005 5/24/2011 Cr-51 1.36E+01 2.16E+01 7.07E+01 U TV ONS l-V 278897005 5/24/2011 Cs-134 6.5 1E+00 2.83E+00 8.26E+00 U TV ONS 1-V 278897005 '5/24/2011 Cs-137 6.56E+00 2.44E+00 6.72E+00 U TV ONS 1-V 278897005 5/24/2011 Fe-59 -9.80E+00 5.74E+00 1.65E+01 U TV ONS I-V 278897005 5/24/2011 1-131 7.87E+00 8.82E+00 2.84E+01 U TV ONS I-V 278897005 5/24/2011 K-40 4.77E+03 2.37E+02 5.79E+01 TV ONS I-V 278897005 5/24/2011 La-140 1.36E+00 5.18E+00 1.74E+01 U TV ONS I-V 278897005 5/24/2011 Mn-54 1.68E+00 1.98E+00 6.40E+00 U TV ONS 1-V 278897005 5/24/2011 Nb-95 3.62E+00 2.37E+00 7.48E+00 U TV ONS 1-V 278897005. 5/24/2011 Ru-103 -7.15E-01 2.21E+00 7.33E+00 U TV ONS 1-V 278897005 5/24/2011 Ru-106 9.67E+00 1.65E+01 5.47E+01 U TV ONS 1-V 278897005 5/24/2011 Sb-124 -2.97E+00 4.91E+00 1.57E+01 U TV ONSI-V 278897005 5/24/2011 Sb-125 1.00E+01 5.43E+00 1.64E+01 U TV ONS l-V 278897005 5/24/2011 Se-75 2.30E+00 2.58E+06 8.43E+00 U TV ONS I-V 278897005 5/24/2011 Th-228 2.53E+00 7.08E+00 1.54E+01 U TV ONS I-V 278897005 5/24/2011 Zn-65 8.32E-02 5.04E+00 1.66E+01 U TV ONS 1-V 278897005 5/24/2011 Zr-95 -2.87E+00 3.76E+00 1.18E+01 U TV ONS 1-V 278897006 5/24/2011 Ac-228 7.48E+00 1.44E+01 4.75E+01 U TV ONS 1-V 278897006 5/24/2011 Ag-108m -1.23E+00 2.77E+00 9.13E+00 U TV ONS I-V 278897006 5/24/2011 Ag-ll0m 8.69E-01 3.19E+00 1.06E+01 U TV ONS I-V 278897006 5/24/2011 Ba-140 -2.16E+0I 1.17E+01 2.77E+01 U TV ONS 1-V 278897006 5/24/2011 Be-7 2.07E+03 1.26E+02 9.41E+01 TV ONS I-V 278897006 5/24/2011 Ce-141 6.15E+00 6.12E+00 2.02E+01 U TV ONS I-V 278897006 5/24/2011 Ce-144 4.70E+00 1.77E+01 5.91E+01 U TV ONS I-V 278897006 5/24/2011 Co-57 1.06E+00 2.38E+00 7.95E+00 U TV ONS I-V 278897006 5/24/2011 Co-58 -2.02E+00 3.86E+00 1.22E+01 U TV ONSI-V 278897006 5/24/2011 Co-60 -1.22E+00 4.52E+00 1.44E+01 U TV ONSI-V 278897006 5/24/2011 CU-51 7.94E+00 3.97E+01 1.28E+02 U TV ONSI-V 278897006 5/24/2011 Cs-134 .6.74E+00 4.92E+00 1.28E+01 U TV ONSI-V 278897006 5/24/2011 Cs-137 5.38E-01 3.78E+00 .1.13E+01 U TV ONSI-V 278897006 5/24/2011 Fe-59 2.02E+01 1.12E+01 3.70E+01 U TV ONS I-V 278897006 5/24/2011 1-131 8.90E+00 1.75E+01 5.68E+01 U TV ONSI-V 278897006 5/24/2011 K-40 4.98E+03 2.81E+02 9.90E+01 TV ONSI-V 278897006 5/24/2011 La-140 -2.16E+01 1.16E+01 2.77E+01 U TV ONSI-V 278897006 5/24/2011 Mn-54 -2.80E+00 3.70E+00 1.14E+01 U D-101

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS I-V 278897006 5/24/2011 Nb-95 6.26E+00 3.81E+00 1.26E+01 U TV ONS I-V 278897006 5/24/2011 Ru-103 -7.82E-01 4.01E+00 1.33E+01 U TV ONS 1-V 278897006 5/24/2011 Ru-106 -2.50E+01 2.94E+01 9.16E+01 U TV ONS 1-V 278897006 5/24/2011 Sb-124 -1.33E+01 8.35E+00 2.05E+01 U TV ONS 1-V 278897006 5/24/2011 Sb-125 1.24E+01 8.55E+00 2.85E+01 U TV ONSI-V 278897006 5/24/2011 Se-75 -2.45E+00 4.47E+00 1.41E+01 U TV ONS 1-V 278897006 5/24/2011 Th-228 3.36E-01 6.26E+00 1.83E+01 U TV ONS1-V 278897006 5/24/2011 Zn-65 -4.63E+00 8.77E+00 2.85E+01 U TV ONS 1-V 278897006 5/24/2011 Zr-95 -4.92E+00 6.90E+00 2.15E+01 U TV OFS-V 278897007 5/24/2011 Ac-228 4.04E+01 1.27E+01 2.97E+01 UI TV OFS-V 278897007 5/24/2011 Ag-108m -4.69E+00 2.87E+00 5.79E+00 U TV OFS-V 278897007 5/24/2011 Ag-Il0m -1.59E+00 2.14E+00 6.83E+00 U TV OFS-V 278897007 5/24/2011 Ba- 140 3.3 1E+00 5.21E+00 1.75E+01 U TV OFS-V 278897007 5/24/2011 Be-7 1.64E+03 9.06E+01 6.24E+01 TV OFS-V 278897007 5/24/2011 Ce- 141 6.38E+00 4.36E+00 1.35E+01 U TV OFS-V 278897007 5/24/2011 Ce-144 -9.03E+00 1.26E+01 4.01E+01 U TV OFS-V 278897007 5/24/2011 Co-57 1.35E+00 1.67E+00 5.37E+00 U TV OFS-V 278897007 5/24/2011 Co-58 -2.05E+00 2.34E+00 7.02E+00 U TV OFS-V 278897007 5/24/2011 Co-60 -3.34E-01 2.22E+00 7.38E+00 U TV OFS-V 278897007 5/24/2011 Cr-51 -4.03E+01 2.68E+01 8.17E+01 U TV- OFS-V 278897007 5/24/2011 Cs-134 1.08E+00 2.88E+00 8.09E+00 U TV OFS-V 278897007 5/24/2011 Cs-137 1.05E+01 3.34E+00 8.03E+00 UI M TV OFS-V 278897007 5/24/2011 Fe-59 -1.86E+00 5.71E+00 1.83E+01 U TV OFS-V 278897007 5/24/2011 1-131 -5.5 1E+00 9.10E+00 2.97E+01 U TV OFS-V 278897007 5/24/2011 K-40 4.57E+03 2.41E+02 6.53E+01 TV OFS-V 278897007 5/24/2011 La-140 3.31 E+00 5.21E+00 1.75E+01 U TV OFS-V 278897007 5/24/2011 Mn-54 1.86E+00 2.17E+00 7.07E+00 U TV OFS-V 278897007 5/24/2011 Nb-95 -1.26E+00 2.25E+00 7.21 E+00 U TV OFS-V 278897007 5/24/2011 Ru-103 2.90E+00 2.59E+00 8.43E+00 U TV OFS-V 278897007 5/24/2011 Ru-106 6.61E+00 1.78E+01 5.89E+01 U TV OFS-V 278897007 5/24/2011 Sb-124 4.23E-01 4.26E+00 1.42E+01 U TV OFS-V 278897007 5/24/2011 Sb-125 4.74E+00 5.44E+00 1.79E+01 U TV OFS-V 278897007 5/24/2011 Se-75 -2.16E-01 2.91E+00 9.74E+00 U TV OFS-V 278897007 5/24/2011 Th-228 1.96E+00 5.40E+00 1.30E+01 U TV OFS-V 278897007 5/24/2011 Zn-65 4.79E-01 5.63E+00 1.83E+01 U TV OFS-V 278897007 5/24/2011 Zr-95 -2.04E+00 3.89E+00 1.25E+01 U TV ONS3- 280707001 6/24/2011 Ac-228 -1.1IE+00 1.61E+01 4.86E+01 U TV ONS3- 280707001 6/24/2011 Ag-108m 2.30E+00 3.1OE+00 1.04E+01 U TV ONS3- 280707001 6/24/2011 Ag-Il0m 3.10E+00 3.52E+00 1.17E+01 U TV ONS3- 280707001 6/24/2011 Ba- 140 -3.92E+00 5.87E+00 1.78E+01 U TV ONS3- 280707001 6/24/2011 Be-7 6.89E+02 7.03E+01 9.11E+01 TV ONS3- 280707001 6/24/2011 Ce- 141 -4.18E+00 6.83E+00 2.00E+01 U TV ONS3- 280707001 6/24/2011 Ce- 144. -3.03E+01 2.28E+01 6.90E+01 U TV ONS3- 280707001 6/24/2011 Co-57 -1.26E+00 2.80E+00 9.11E+00 U TV ONS3- 280707001 6/24/2011 Co-58 -4.12E+00 3.75E+00 1.1OE+01 U TV ONS3- 280707001 6/24/2011 Co-60 4.53E-01 4.68E+00 1.42E+01 U TV ONS3- 280707001 6/24/2011 Cr-51 1.57E+01 3.28E+01I 1.12E+02 U TV ONS3- 280707001 6/24/2011 Cs-134 3.67E+00 4.53E+00 1.50E+01 U TV ONS3- 280707001 6/24/2011 Cs-137 -7.3 1E-01 3.81E+00 1.23E+01 U TV ONS3- 280707001 6/24/2011 Fe-59 -3.03E+00 7.98E+00 2.59E+01 U TV ONS3- 280707001 6/24/2011 1-131 9.39E+00 .6.55E+00 2.16E+01 U D-102

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3- 280707001 6/24/2011 K-40 3.78E+03 2.44E+02 1.28E+02 TV ONS3- 280707001 6/24/2011 La-140 -3.92E+00 5.87E+00 1.78E+01 TV ONS3- 280707001 6/24/2011 Mn-54 2.OOE+/-00 3.75E+00 1.23E+01 TV ONS3- 280707001 6/24/2011 Nb-95 1.52E+00 3.53E+00 1.16E+01 TV ONS3- 280707001 6/24/2011 Ru- 103 9.07E-01 3.64E+00 1.22E+01 TV ONS3- 280707001 6/24/2011 Ru-106 1.40E+01 3.11 E+01 1.03E+02 TV ONS3- 280707001 6/24/2011 Sb-124 1.32E+01 8.05E+00 2.77E+01 TV' ONS3- 280707001 6/24/2011 Sb-125 5.88E+00 9.84E+00 3.31E+01 TV ONS3- 280707001 6/24/2011 Se-75 -2.76E-01 4.85E+00 1.56E+01 TV ONS3- 280707001 6/24/2011 Th-228 9.42E+00 9.95E+00 2.48E+01 TV ONS3- 280707001 6/24/2011 Zn-65 -3.30E+01 1.17E+01 2.35E+01 TV ONS3- 280707001 6/24/2011 Zr-95 2.5 1E+00 6.21E+00 2.04E+01 TV ONS3- 280707002 6/24/2011 Ac-228 6.35E-01 1.64E+01 5.13E+01 TV ONS3- 280707002 6/24/2011 Ag-108m -1.52E+00 2.83E+00 8.84E+00 TV ONS3- 280707002 6/24/2011 Ag-il0m 1.18E+00 3.11E+00 1.04E+01 TV ONS3- 280707002 6/24/2011 Ba-140 6.34E-01 4.91E+00 1.66E+01 TV ONS3- 280707002 6/24/2011 Be-7 6.86E+02 7.OOE+01 8.66E+01 TV ONS3- 280707002 6/24/2011 Ce- 141 -4.49E+00 4.99E+00 1.52E+01 TV ONS3- 280707002 6/24/2011 Ce- 144 2.59E+01 1.87E+01 5.89E+01 TV ONS3- 280707002 6/24/2011 Co-57 -1.21E+00 2.40E+00 7.59E+00 TV ONS3- 280707002 6/24/2011 Co-58 1.50E-01 3.66E+00 1.20E+01 TV ONS3- 280707002 6/24/2011 Co-60 2.40E+00 3.77E+00 1.28E+01 TV ONS3- 280707002 6/24/2011 Cr-51 1.72E+01 3.23E+01 1.07E+02 TV ONS3- 280707002 6/24/2011 Cs-134 1.26E+00 3.76E+00 1.25E+01 TV ONS3- 280707002 6/24/2011 Cs-137 -1.42E+00 3.59E+00 1.16E+01 TV ONS3- 280707002 6/24/2011 Fe-59 -1.09E+00 6.65E+00 2.19E+01 TV ONS3- 280707002 6/24/2011 1-131 - 1.16E+00 5.55E+00 1.80E+01 TV ONS3- 280707002 6/24/2011 K-40 2.33E+03 1.71E+02 8.62E+01 TV ONS3- 280707002 6/24/2011 La-140 6.34E-01 4.91E+00 1.66E+01 TV ONS3- 280707002 6/24/2011 Mn-54 -4.61E-01 3.21 E+00 1.03E+01 TV ONS3- 280707002 6/24/2011 Nb-95 -2.74E 3.20E+00 1.04E+01 TV ONS3- 280707002 6/24/2011 Ru-103 3.87E-01 3.17E+00 1.07E+01 TV ONS3- 280707002 6/24/2011 Ru-106 1.41E+01 3.OOE+01 1.01E+02 TV ONS3- 280707002 6/24/2011 Sb-124 -1.53E+01 8.17E+00 1.90E+01 TV ONS3- 280707002 6/24/2011 Sb-125 -6.87E-01 8.74E+00 2.81E+01 TV ONS3- 280707002 6/24/2011 Se-75 -2. 1OE+00 4.13E+00 1.35E+01 TV ONS3- 280707002 6/24/2011 Th-228 7.1OE+00 8.23E+00 2.07E+01 TV ONS3- 280707002 6/24/2011 Zn-65 -2.36E+01 9.71E+00 2.18E+01 TV ONS3- 280707002 6/24/2011 Zr-95 1.96E+00 6.08E+00 2.02E+01 TV ONS3- 280707003 6/24/2011 Ac-228 7.32E+00 1.88E+01 5.81E+01 TV ONS3- 280707003 6/24/2011 Ag-108m 1.24E+00 3.28E+00 1.06E+01 TV ONS3- 280707003 6/24/20i 1 Ag-Il0m -3.24E+00 3.79E+00 1.17E+01 TV ONS3- 280707003 6/24/2011 Ba- 140 -8.37E+00 6.57E+00 1.84E+01 TV ONS3- 280707003 6/24/2011 Be-7 4.72E+02 7.08E+01 9.98E+01 TV ONS3- 280707003 6/24/2011 Ce- 141 5.95E+00 6.04E+00 1.92E+01 TV ONS3- 280707003 6/24/2011 Ce-I144 -2.29E+0 I 2.21 E+01 6.59E+01 TV ONS3- 280707003 6/24/2011 Co-57 -1.99E+00 2.80E+00 8.65E+00 TV ONS3- 280707003 6/24/2011 Co-58 8.01E+00 4.12E+00 1.34E+01 TV ONS3- 280707003 6/24/2011 Co-60 -1.98E+00 3.85E+00 1.19E+01 TV ONS3- 280707003 6/24/2011 Cr-51 2.84E+01 3.24E+01 1.07E+02 TV ONS3- 280707003 6/24/2011 Cs-134 -1.14E+00 1.48E+01 4.63E+00 D-103

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3- 280707003 6/24/2011 Cs-137 4.10E+00 4.20E+00 1.41E+01 U TV ONS3- 280707003 6/24/2011 Fe-59 -5.03E+00 8.38E+00 2.64E+01 U TV ONS3- 280707003 6/24/2011 1-131 -9.61E-01 6.12E+00 1.97E+01 U TV ONS3- 280707003 6/24/2011 K-40 3.79E+03 2.45E+02 1.35E+02 TV ONS3- 280707003 6/24/2011 La-140 -8.37E+00 6.57E+00 1.84E+01 U TV ONS3- 280707003 6/24/2011 Mn-54 -1.47E+00 3.77E+00 1.19E+01 U TV ONS3- 280707003 6/24/2011 Nb-95 -1.34E+01 6.26E+00 1.35E+01 U TV ONS3- 280707003 6/24/2011 Ru- 103 2.08E+00 3.68E+00 1.25E+01 U TV ONS3- 280707003 6/24/2011 Ru-106 -1.40E+01 3.53E+01 1.14E+02 U TV ONS3- 280707003 6/24/2011 Sb-124 8.93E+00 8.16E+00 2.90E+01 U TV ONS3- 280707003 6/24/2011 Sb-125 1.62E+00 9.46E+00 3.05E+01 U TV ONS3- 280707003 6/24/2011 Se-75 -1.30E+00 4.26E+00 1.39E+01 U TV ONS3- 280707003 6/24/2011 Th-228 -1.47E+01 9.58E+00 3.OOE+01 U TV ONS3- 280707003 6/24/2011 Zn-65 8.85E+00 1.03E+01 3.47E+01 U TV ONS3- 280707003 6/24/2011 Zr-95 3.90E-01 6.92E+00 2.26E+01 U TV ONS I- 280707004 6/24/2011 Ac-228 3.20E+01 2.8 1E+01 8.69E+01 U TV ONSI- 280707004 6/24/2011 Ag-108m 1.53E+00 4.71E+00 1.56E+01 U TV ONSI- 280707004 6/24/2011 Ag-ll0m -8.49E-01 4.94E+00 1.65E+01 U TV ONSI- 280707004 6/24/2011 Ba-140 -9.07E+00 8.45E+00 2.36E+01 U TV ONS 1- 280707004 6/24/2011 Be-7 9.20E+02 1.25E+02 1.65E+02 TV. ONS 1- 280707004 6/24/2011 Ce- 141 4.02E+00 1.1OE+01 3.1OE+0I U TV ONS 1- 280707004 6/24/2011 Ce- 144 -2.36E+01 3.49E+01 1.1OE+02 U TV ONS 1- 280707004 6/24/2011 Co-57 1.03E+01 4.93E+00 1.50E+01 U TV 6/24/2011 -3.77E+00 1.62E+01 ONS 1- 280707004 Co-58 5.19E+00 U TV ONS 1- 280707004 6/24/2011 Co-60 3.32E+00 6.30E+00 2.16E+01 U TV ONS 1- 280707004 6/24/2011 Cr-51 -5.26E+01 4.82E+01 1.49E+02 U TV ONSI- 280707004 6/24/2011 Cs-134 -8.55E+00 7.06E+00 2.09E+01 U TV ONSI- 280707004 6/24/2011 Cs-137 -2.05E+00 5.83E+00 1.92E+01 U TV ONSI- 280707004 6/24/2011 Fe-59 1.36E+01 1.18E+01 4.OOE+01 TV ONSI- 280707004 6/24/2011 1-131 -7.15E+00 9.20E+00 2.91E+01 U TV ONSI- 280707004 6/24/2011 K-40 3.57E+03 2.86E+02 2.17E+02 TV ONS I- 280707004 6/24/2011 La-140 -9.07E+00 8.44E+00 2.36E+01 U TV ONS I- 280707004 6/24/2011 MnT54 -1.63E+01 6.47E+00 1.38E+01 U TV ONSI- 280707004 6/24/2011 Nb-95 -1.81E+00 7.05E+00 1.95E+01 U TV ONSI- 280707004 6/24/2011 Ru- 103 -9.57E-01 5.42E+00 1.74E+01 U TV ONS 1- 280707004 6/24/2011 Ru-106 -1.79E+01 4.49E+01 1.48E+02 U TV ONSI- 280707004 6/24/2011 Sb-124 1.60E+01 1.36E+01 4.75E+01 U TV ONS I- 280707004 6/24/2011 Sb-125 -7.43E-01 1.46E+01 4.79E+01 U TV ONS I- 280707004 6/24/2011 Se-75 4.66E+00 6.57E+00 2.24E+01 U TV ONS I- 280707004 6/24/2011 Th-228 4.82E+00 1.19E+01 3.66E+01 U TV ONSI- 280707004 6/24/2011 Zn-65 8.08E+00 1.53E+01 5.05E+01 U TV ONSI- 280707004 6/24/2011 Zr-95 -1.20E+01 1.06E+01 3.18E+01 U TV ONSI- 280707005 6/24/2011 Ac-228 1.81E+01 1.58E+01 4.53E+01 U TV ONSI- 280707005 6/24/2011 Ag-108m -2.96E+00 2.48E+00 7.50E+00 U TV ONS 1- 280707005 6/24/2011 Ag-ll0m -1.55E+00 2.76E+00 8.55E+00 U TV ONSI- 280707005 6/24/2011 Ba-140 -3.40E+00 3.60E+00 1.02E+01 U TV ONSI- 280707005 6/24/2011 Be-7 7.30E+02 6.62E+01 8.97E+01 TV ONS 1- 280707005 6/24/2011 Ce- 141 -5.60E+00 5.15E+00 1.37E+01 U TV ONSI- 280707005 6/24/2011 Ce-i144 1.06E+01 1.51E+01 5.07E+01 U TV ONSI- 280707005 6/24/2011 Co-57 3.78E-01 1.91E+00 6.43E+00 U TV ONSI- 280707005 6/24/2011 Co-58 5.75E-01 2.56E+00 8.70E+00 U D-104

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONSI- 280707005 6/24/2011 Co-60 1.86E+00 3.64E+00 1.21E+01 U TV ONSI- 280707005 6/24/2011 Cr-51 -1. 16E+01 2.36E+01 7.85E+01 U TV ONSI- 280707005 6/24/2011 Cs-134 -1.12E+00 3.16E+00 1.04E+01 U TV ONSI- 280707005 6/24/2011 Cs-137 4.48E+00 2.96E+00 9.77E+00 U TV ONS I- 280707005 6/24/2011 Fe-59 9.12E+00 6.23E+00 2.12E+01 U TV ONSI- 280707005 6/24/2011 1-131 3.71 E+00 4.56E+00 1.56E+01 U TV ONSI- 280707005 6/24/2011 K-40 2.27E+03 1.55E+02 8.73E+01 TV ONSI- 280707005 6/24/2011 La-140 -3.40E+00 3.60E+00 1.02E+01 U TV ONSI- 280707005 6/24/2011 Mn-54 -5.59E-01 2.95E+00 9.76E+00 U TV ONSI- 280707005 6/24/2011 Nb-95 3.43E+00 3.05E+00 1.05E+01 U TV ONSI- 280707005 6/24/2011 Ru-I103 7.64E-01 2.63E+00 8.79E+00 U TV ONSI- 280707005 6/24/2011 Ru-I106 3.28E+01 2.72E+01 8.99E+01 U TV ONSI- 280707005 6/24/2011 Sb-124 6.22E+00 7.52E+00 2.61E+01 U TV ONSI- 280707005 6/24/2011 Sb-125 -1.78E+00 7.37E+00 2.43E+01 U TV ONS I- 280707005 6/24/2011 Se-75 4.26E-01 3.67E+00 1.18E+01 U TV ONSI- 280707005 6/24/2011 Th-228 2.11E+00 7.74E+00 1.78E+01 U TV ONSI- 280707005 6/24/2011 Zn-65 -5.61E+00 7. 1OE+00 2.17E+01 U TV ONSI- 280707005 6/24/2011 Zr-95 -1.64E+00 4.84E+00 1.60E+01 U TV ONSI- 280707006 6/24/2011 Ac-228 -5.29E+01 2.86E+01 6.93E+01 U TV ONSI- 280707006 6/24/2011 Ag-108m 3.06E+00 4.62E+00 1.52E+01 U TV ONS 1- 280707006 6/24/2011 Ag-Il0m -2.47E+00 5.12E+00 1.66E+01 U TV ONSI- 280707006 6/24/2011 Ba- 140 5.25E-01 7.89E+00 2.64E+01 U TV ONSI- 280707006 6/24/2011 Be-7 7.87E+02 9.96E+01 1.58E+02 TV ONSI- 280707006 6/24/2011 Ce-I141 -5.64E+00 9.82E+00 2.92E+01 U TV ONSI- 280707006 6/24/2011 Ce- 144 -5.42E+00 2.98E+01 1.00E+02 U TV ONS 1- 280707006 6/24/2011 Co-57 5.60E+00 3.81E+00 1.26E+01 U TV ONSI- 280707006 6/24/2011 Co-58 -1.26E-01 5.66E+00 1.87E+01 U TV ONS 1- 280707006 6/24/2011 Co-60 1.19E+01 6.55E+00 2.21E+01 U TV ONSI- 280707006 6/24/2011 Cr-51 -6.27E+01 4.86E+01 1.44E+02 U TV ONSI- 280707006 6/24/2011 Cs-134 -9.85E+00 6.91E+00 1.96E+01 U TV ONSI- 280707006 6/24/2011 Cs-137 7.96E+00 5.96E+00 2.03E+01 U TV ONS1- 280707006 6/24/2011 Fe-59 -1.69E+00 1.26E+01 4.08E+01 U ONS'I-TV 280707006 6/24/2011 1-131 5.65E+00 9.68E+00 3.20E+01 U TV ONS1- 280707006 6/24/2011 K-40 2.57E+03 2.39E+02 1.64E+02 TV ONSI- 280707006 6/24/2011 La-140 5.25E-01 7.89E+00 2.64E+01 U TV ONSI- 280707006 6/24/2011 Mn-54 7.09E+00 5.52E+00 1.88E+01 U TV ONSI- 280707006 6/24/2011 Nb-95 1.20E+01 6.24E+00 2.06E+01 U TV ONSI- 280707006 6/24/2011 Ru-103 -8.56E+00 5.78E+00 1.59E+01 U TV ONSI- 280707006 6/24/2011 Ru-106 -6.53E+00 4.59E+01 1.53E+02 U TV ONSI- 280707006 6/24/2011 Sb-124 3.92E+00 1.35E+01 4.58E+01 U TV ONSI- 280707006 6/24/2011 Sb-125 1.29E+01 1.44E+01 4.73E+01 U TV 280707006 6/24/2011 Se-75 -7.59E-01 6.70E+00 2.21E+01 U TV ONSI- 280707006 6/24/2011 Th-228 -2.12E+01 1.23E+01 3.32E+01 U TV ONSI- 280707006 6/24/2011 Zn-65 -9.04E+00 1.34E+01 4.12E+01 U TV ONSI- 280707006 6/24/2011 Zr-95 -2.55E+00 8.53E+00 2.78E+01 U TV OFS-V 280707007 6/24/2011 Ac-228 1.69E+00 1.13E+01 3.49E+01 U TV OFS-V 280707007 6/24/2011 Ag- 108m 2.18E+00 2.08E+00 6.98E+00 U TV OFS-V 280707007 6/24/2011 Ag-Il0m -1.lIE+00 2.21E+00 7.01E+00 U TV .OFS-V 280707007 6/24/2011 Ba- 140 8.91E-01 3.86E+00 1.31E+01 U TV OFS-V 280707007 6/24/2011 Be-7 7.97E+02 6.18E+01 6.31E+01 TV OFS-V 280707007 6/24/2011 Ce-141 5.43E+00 3.7 1E+00 1.20E+01 U D-105

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV OFS-V 280707007 6/24/2011 Ce-144 8.99E+00 1.38E+01 4.64E+01 U TV OFS-V 280707007 6/24/2011 Co-57 1.57E+00 1.76E+00 5.88E+00 U TV OFS-V 280707007 6/24/2011 Co-58 -2.55E'-01 2.59E+00 8.29E+00 U TV OFS-V 280707007 6/24/2011 Co-60 1.64E+00 2.82E+00 9.43E+00 U TV OFS-V 280707007 6/24/2011 Cr-51 -8.62E+00 2.19E+01 6.93E+01 U TV OFS-V 280707007 6/24/2011 Cs-134 -4.04E+00 3.06E+00 8.73E+00 U TV OFS-V 280707007 6/24/2011 Cs-137 2.21E+00 2.46E+00 8.15E+00 U TV OFS-V 280707007 6/24/2011 Fe-59 1.36E+00 5.93E+00 1.98E+01 U TV OFS-V 280707007 6/24/2011 1-131 2.74E+00 3.99E+00 1.36E+01 U TV OFS-V 280707007 6/24/2011 K-40 3.25E+03 1.97E+02 8.30E+01 TV OFS-V 280707007 6/24/2011 La-140 8.91E-01 3.86E+60 1.31E+01 U TV OFS-V 280707007 6/24/2011 Mn-54 3.45E+00 2.65E+00 8.94E+00 U TV OFS-V 280707007 6/24/2011 Nb-95 -3.04E+00 2.82E+00 7.96E+00 U TV OFS-V 280707007 6/24/2011 Ru-103 1.00E-01 2.30E+00 7.64E+00 U TV OFS-V 280707007 6/24/2011 Ru-106 -3.96E+01 2.42E+01 6.82E+01 U TV OFS-V 280707007 6/24/2011 Sb-124 -6.02E+00 4.79E+06 1.33E+01 U TV OFS-V 280707007 6/24/2011 Sb-125 -6.31 E+00 6.23E+00 1.96E+01 U TV OFS-V 280707007 6/24/2011 Se-75 4.23E-01 3.07E+00 1.00E+01 U TV OFS-V 280707007 6/24/2011 Th-228 -1.62E+00 5.44E+00 1.70E+01 U TV OFS-V 280707007 6/24/2011 Zn-65 -9.69E+00 8.60E+00 2.11E+01 U TV OFS-V 280707007 6/24/2011 Zr-95 -1.72E+00 5.96E+00 1.65E+01 U TV ONS3- 282331001 7/18/2011 Ac-228 1.55E+01 1.50E+01 3.91E+01 U TV ONS3- 282331001 7/18/2011 Ag-108m 3.26E+00 2.42E+00 7.67E+00 U TV ONS3- 282331001 7/18/2011 Ag-110m -5.05E+00 2.79E+00 7.72E+00 U TV ONS3- 282331001 7/18/2011 Ba-140 4.84E+00 3.43E+00 1.17E+01 U TV ONS3- 282331001 7/18/2011 Be-7 1.50E+03 8.74E+01 6.55E+01 TV ONS3- 282331001 7/18/2011 Ce- 141 7.45E+00 4.23E+00 1.27E+01 U TV ONS3- 282331001 7/18/2011 Ce-144 -8.80E+00 1.60E+01 4.99E+01 U TV ONS3- 282331001 7/18/2011 Co-57 -7.02E-02 1.97E+00 6.30E+00 U TV ONS3- 282331001 7/18/2011 Co-58 6.72E-01 2.48E+00 8.11E+00 U TV ONS3- 282331001 7/18/2011 Co-60 -2.64E-01 3.20E+00 1.04E+01 U TV ONS3- 282331001 7/18/2011 Cr-51 9.OOE+00 2.17E+01 7.11E+01 U TV ONS3- 282331001 7/18/2011 Cs-134 5.89E+00 3.66E+00 1.17E+01 U TV ONS3- 282331001 7/18/2011 Cs-137 8.19E+00 3.46E+00 1.03E+01 U TV ONS3- 282331001 7/18/2011 Fe-59 -5.07E+00 6.19E+00 1.94E+01 U TV ONS3- 282331001 7/18/2011 1-131 2.73E+00 3.42E+00 I.IIE+01 U TV ONS3- 282331001 7/18/2011 K-40 3.45E+03 1.92E+02 9.07E+01 TV ONS3- 282331001 7/18/2011 La-140 4.84E+00 3.42E+00 1.17E+01 U TV ONS3- 282331001 7/18/2011 Mn-54 2.44E+00 2.66E+00 8.70E+00 U TV ONS3- 282331001 7/18/2011 Nb-95 2.77E-01 2.65E+00 8.64E+00 U TV ONS3- 282331001 7/18/2011 Ru-103 -5.94E+00 2.74E+00 7.24E+00 U TV ONS3- 282331001 7/18/2011 Ru-106 -1.95E+01 2.66E+01 7.22E+01 U TV ONS3- 282331001 7/18/2011 Sb-124 3.61E+00 5.26E+00 1.80E+01 U TV ONS3- 282331001 7/18/2011 Sb-125 3.,54E+00 7.08E+00 2.29E+01 U TV ONS3- 282331001. 7/18/2011 Se-75 1.59E+00 3.38E+00 1.12E+01 U TV ONS3- 282331001 7/18/2011 Th-228 5.89E+00 1.06E+01 2.25E+01 U TV ONS3- 282331001 7/18/2011 Zn-65 -5.90E+00 6.61 E+00 2.06E+01 U TV ONS3- 282331001 7/18/2011 Zr-95 -1.64E+00 4.18E+00 .1.33E+01 U TV ONS3- 282331002 7/18/2011 Ac-228 -5.63E+00 1.26E+01 2.99E+01 U TV ONS3- 282331002 7/18/2011 Ag-108m -1.42E+00 1.92E+00 6.05E+00 U TV ONS3- 282331002 7/18/2011 Ag-I lOm -1.81E+00 2.09E+00 6.69E+00 U D-106

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3- 282331002 7/18/2011 Ba-140 -3.77E-01 2.65E+00 8.62E+00 U TV ONS3- 282331002 7/18/2011 Be-7 1.13E+03 6.78E+01 5.36E+01 TV ONS3- 282331002 7/18/2011 Ce-141 3.82E+00 5.01E+00 1.04E+01 U TV ONS3- 282331002 7/18/2011 Ce-144 -7.08E+00 1.32E+01 4.22E+01 U TV ONS3- 282331002 7/18/2011 Co-57 -1.39E+00 1.79E+00 5.70E+00 U TV ONS3- 282331002 7/18/2011 Co-58 8.73E-01 1.92E+00 6.44E+00 U TV ONS3- 282331002 7/18/2011 Co-60 4.78E+00 2.73E+00 9.03E+00 U TV ONS3- 282331002 7/18/2011 Cr-51 -1.62E+01 1.95E+01 6.28E+01 U TV ONS3- 282331002 7/18/2011 Cs-134 -9.49E-01 2.52E+00 8.19E+00 U TV ONS3- 282331002 7/18/2011 Cs-137 1.82E+00 2.32E+00 7.86E+00 U TV ONS3- 282331002 7/18/2011 Fe-59 6.50E+00 4.55E+00 1.49E+01 U TV ONS3- 282331002 7/18/2011 1-131 -5.43E+00 3.67E+00 9.61E+00 U TV ONS3- 282331002 7/18/2011 K-40 1.38E+03 9.77E+01 7.06E+01 TV ONS3- 282331002 7/18/2011 La-140 -3.77E-01 2.65E+00 8.62E+00 U TV ONS3- 282331002 7/18/2011 Mn-54 7.84E-01 2.19E+00 7.31E+00 U TV ONS3- 282331002 7/18/2011 Nb-95 2.19E+00 2.08E+00 6.97E+00 U TV ONS3- 282331002 7/18/2011 Ru-103 -3.79E+00 2.32E+00 6.52E+00 U TV ONS3- 282331002 7/18/2011 Ru-106 1.97E+01 1.93E+01 6.55E+01 U TV ONS3- 282331002 7/18/2011 Sb-124 7.64E-01 6.50E+00 1.69E+01 U TV ONS3- 282331002 7/18/2011 Sb-125 -4.84E+00 5.96E+00 1.87E+01 U TV ONS3- 282331002 7/18/2011 Se-75 -1.88E-01 2.79E+00 9.42E+00 U TV ONS3- 282331002 7/18/2011 Th-228 4.57E+00 5.32E+00 1.38E+01 U TV ONS3- 282331002 7/18/2011 Zn-65 -1.33E+01 5.85E+00 1.39E+01 U TV ONS3- 282331002 7/18/2011 Zr-95 -3.68E+00 4.49E+00 1.18E+01 U TV ONS3- 282331003 7/18/2011 Ac-228 4.36E+01 2.56E+01 6.91E+01 U TV ONS3- 282331003 7/18/2011 Ag-108m 9.69E-01 3.84E+00 1.28E+01 U TV ONS3- 282331003 7/18/2011 Ag-ll0m -3.73E+00 4.32E+00 1.35E+01 U TV ONS3- 282331003 7/18/2011 Ba-140 -1.97E+00 6.03E+00 1.96E+01 U TV ONS3- 282331003 7/18/2011 Be-7 1.13E+03 9.54E+01 1.23E+02 TV ONS3- 282331003 7/18/2011 Ce-141 -1.46E+00 7.01E+00 2.27E+01 U TV ONS3- 282331003 7/18/2011 Ce-144 -5.87E+01 3.06E+01 8.48E+01 U TV ONS3- 282331003' 7/18/2011 Co-57 -6.57E-01 3.42E+00 1.lIE+01 U TV ONS3- 282331003 7/18/2011 Co-58 4.58E-01 4.30E+00 1.41E+01 U TV ONS3- 282331003 7/18/2011 Co-60 -7.95E+00 6.11E+00 1.62E+01 U TV ONS3- 282331003 7/18/2011 Cr-51 -3.41E+01 3.92E+01 1.26E+02 U TV ONS3- 282331003 7/18/2011 Cs-134 -5.92E+00 5.67E+00 1.73E+01 U TV ONS3- 282331003 7/18/2011 Cs-137 5.16E+00 4.66E+00 1.54E+01 U TV ONS3- 282331003 7/18/2011 Fe-59 8.16E+00 8.96E+00 2.96E+01 U TV ONS3- 282331003 7/18/2011 1-131 -2.24E+00 5.57E+00 1.83E+01 U TV ONS3- 282331003 7/18/2011 K-40 1.27E+03 3.18E+02 4.17E+02 UI TV ONS3- 282331003 7/18/2011 La-140 -1.97E+00 6.03E+00 1.96E+01 U TV ONS3- 282331003 7/18/2011 Mn-54 6.75E-01 4.42E+00 1.45E+01 U TV ONS3- 282331003 7/18/2011 Nb-95 -4.33E-01 4.26E+00 1.39E+01 U TV ONS3- 282331003 7/18/2011 Ru-103 -1.03E+00 4.33E+00 1.39E+01 U TV ONS3- 282331003 7/18/2011 Ru-106 -1.57E+01 4.05E+01 1.31E+02 U TV ONS3- 282331003 7/18/2011 Sb-124 6.91E-01 8.73E+00 2.90E+01 U TV ONS3- 282331003 7/18/2011 Sb-125 -1.30E+00 1.16E+01 3.85E+01 U TV ONS3- 282331003 7/18/2011 Se-75 -1.06E+01 6.26E+00 1.85E+01 U TV ONS3- 282331003 7/18/2011 Th-228 2.18E+00 1.1IE+01 2.99E+01 U TV ONS3- 282331003 7/18/2011 Zn-65 2.06E+01 1.08E+01 3.40E+01 U TV ONS3- 282331003 7/18/2011 Zr-95 -1.03E+01 8.11E+00 2.41E+01 U D-107

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONSI- 282331004 7/18/2011 Ac-228 1.33E+01 1.24E+01 2.59E+01 U TV ONS 1- 282331004 7/18/2011 Ag-108m 3.53E-01 1.37E+00 4.63E+00 U TV ONSI- 282331004 7/18/2011 Ag-Il0m -1.32E+00 1.47E+00 4.49E+00 U TV ONSI- 282331004 7/18/2011 Ba- 140 -1.69E+00 2.20E+00 6.85E+00 U TV ONSI- 282331004 7/18/2011 Be-7 9.71E+02 5.73E+01 3.89E+01 TV ONSI- 282331004 7/18/2011 Ce-I141 5.1OE+00 2.58E+00 7.27E+00 U TV ONSI- 282331004 7/18/2011 Ce- 144 -1.11E+00 8.54E+00 2.86E+01 U TV ONSI- 282331004 7/18/2011 Co-57 2.38E-01 1.08E+00 3.64E+00 U TV ONSI- 282331004 7/18/2011 Co-58 1.98E+00 1.49E+00 5.05E+00 U TV ONSI- 282331004 7/18/2011 Co-60 -4.06E-02 1.80E+00 5.83E+00 U TV ONSI- 282331004 7/18/2011 Cr-51 -1.48E+01 1.38E+01 4.1OE+01 U TV ONS 1- 282331004 7/18/2011 Cs-134 2.38E+00 2.03E+00 6.58E+00 U TV ONS 1- 282331004 7/18/2011 Cs-137 4.17E+00 1.95E+00 5.98E+00 U TV ONS 1- 282331004 7/18/2011 Fe-59 -2.93E+00 3.70E+00 1.16E+01 U TV ONS 1- 282331004 7/18/2011 1-131 7.68E-01 1.88E+00 6.41E+00 U TV ONS 1- 282331004 7/18/2011 K-40 1.49E+03 9.44E+01 4.37E+01 TV ONSI- 282331004 7/18/2011 La-140 -1.69E+00 2.20E+00 6.85E+00 U TV ONS 1- 282331004 7/18/2011 Mn-54 1.54E+00 1.76E+00 5.98E+00 U TV ONS 1- 282331004 7/18/2011 Nb-95 -1.08E+00 1.74E+00 5.39E+00 U TV ONSI- 282331004 7/18/2011 Ru-103 -2.34E+00 1.50E+00 4.33E+00 U TV ONSI- 282331004 7/18/2011 Ru-106 1.76E+01 1.47E+01 4.80E+01 U TV ONSI- 282331004 7/18/2011 Sb-124 -4.39E+00 3.80E+00 1.11 E+01 U TV ONSI- 282331004 7/18/2011 Sb-125 -2.OOE+00 .4.09E+00 1.34E+01 U TV ONSI- 282331004 '7/18/2011 Se-75 3.07E+00 2.15E+00 6.76E+00 U TV ONSI- 282331004 7/18/2011 Th-228 6.48E-01 3.92E+00 1.03E+01 U TV ONS 1- 282331004 7/18/2011 Zn-65 -6.61 E+00 4.11E+00 1.15E+01 U TV ONS I- 282331004 7/18/2011 Zr-95 -4.58E-01 2.65E+00 8.45E+00 U TV ONS 1- 282331005 7/18/2011 Ac-228 4.04E+01 1.86E+01 5.06E+01 U TV ONSI- 282331005 7/18/2011 Ag-108m -7.45E-01 2.96E+00 9.88E+00 U TV ONSI- 282331005 7/18/2011 Ag-I l0m -6.06E+00 3.82E+00 1.11E+01 U TV ONS 1- 282331005 7/18/2011 Ba-140 -3.06E+00 5.1IE+00 1.60E+01 U TV ONS 1- 282331005 7/18/2011 Be-7 1.11E+03 8.01E+01 8.88E+01 TV ONSI- 282331005 7/18/2011 Ce- 141 -4.82E+00 5.74E+00 1.45E+01 U TV ONSI- 282331005 7/18/2011 Ce- 144 -3.25E+01' 1.96E+01 5.75E+01 U TV ONSI- 282331005 7/18/2011 Co-57 2.17E+00 2.3 1E+00 7.64E+00 U TV ONS I- 282331005 7/18/2011 Co-58 3.01E+00 3.43E+00 1.13E+01 U TV ONSI- 282331005 7/18/2011 Co-60 -3.45E+00 3.99E+00 1.24E+01 U TV ONSI- 282331005 7/18/2011 Cr-51 -2.67E+01 2.89E+01 8.86E+01 U TV ONSI- 282331005 7/18/2011 Cs-134 1.05E+00 4.34E+00 1.43E+01 U TV ONSI- 282331005 7/18/2011 Cs-137 8.30E+00 4.40E+00 1.38E+01 U TV ONSI- 282331005 7/18/2011 Fe-59 -3.79E+00 7.23E+00 2.36E+01 U TV ONS 1- 282331005 7/18/2011 1-131 . 2.56E+00 4.42E+00 1.43E+01 U TV ONS 1- 282331005 7/18/2011 K-40 2.21E+03 1.64E+02 1.20E+02 TV ONS 1- 282331005 7/18/2011 La-140 -3.06E+00 5.1OE+00 1.60E+01 U TV ONS 1- 282331005 7/18/2011 Mn-54 -2.70E+00 3.36E+00 1.04E+01 U TV ONSI- 282331005 7/18/2011 Nb-95 2.04E+00 3.13E+00 1.04E+01 U TV ONSI- 282331005 7/18/2011 Ru-103 -3.79E+00 3.1OE+00 9.49E+00 U TV ONSI- 282331005 7/18/2011 Ru-106 -1.22E+01 2.92E+01 9.48E+01 U TV ONSI- 282331005 7/18/2011 Sb-124 -3.66E+00 8.72E+00 2.77E+01 U TV ONSI- 282331005 7/18/2011 Sb-125 1.1OE+01 9.17E+00 3.05E+01 U TV ONSI- 282331005 7/18/2011 Se-75 5.50E+00 4.33E+00 1.38E+01 U D-108

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE, END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS 1- 282331005 7/18/2011 Th-228 7.93E-01 8.61E+00 1.95E+01 U TV ONS 1- 282331005 7/18/2011 Zn-65 -4.83E+00 8.16E+00 2.65E+01 U TV ONS 1- 282331005 7/18/2011 Zr-95 -8.42E+00 6.08E+00 1.77E+01 U TV ONS 1- 282331006 .7/18/2011 Ac-228 -2.49E+01 1.86E+01 4.14E+01 U TV ONS 1- 282331006 7/18/2011 Ag-108m -2.69E+00 2.41E+00 7.43E+00 U TV ONS 1- 282331006 7/18/2011 Ag-I l0m -5.70E+00 2.95E+00 7.86E+00 U TV ONSI- 282331006 7/18/2011 Ba- 140 4.32E+00 3.65E+00 1.22E+01 U TV ONS ON S 1-1- 282331006 7/18/2011 Be-7 1.48E+03 9.18E+01 6.99E+01 TV 282331006 7/18/2011 Ce- 141 7.09E+00 4.19E+00 1.28E+01 U-TV ONSI- 282331006 7/18/2011 Ce- 144 1.00E+01 1.48E+01 4.78E+01 U TV ONSI- 282331006 7/18/2011 Co-57 -2.78E+00 2.04E+00 6.11E+00 U TV ONS 1- 282331006 7/18/2011 Co-58 5.18E-02 2.87E+00 9.67E+00 U TV. ONSI- 282331006 7/18/2011 Co-60 2.05E+00 3.33E+00 1.11E+01 U TV ONSI- 282331006 7/18/2011 Cr-51 -6.61 E+00 2.21E+01 7.30E+01 U TV ONSi- 282331006 7/18/2011 Cs-134 -1.73E+00 3.43E+00 1.13E+01 U TV ONSI- 282331006 7/18/2011 Cs-137 1.94E+00 3.OOE+00 9.82E+00 U TV ONSi- 282331006 7/18/2011 Fe-59 -3.66E+00 6.56E+00 2.12E+01 U TV ONS 1- 282331006 7/18/2011 1-131 -2.30E+00 3.43E+00 1.11E+01 U TV ONSI- 282331006 7/i8/2011 K-40 4.37E+03 2.26E+02 8.49E+01 TV ONSI- 282331006 7/18/2011 La-140 4.32E+00 3.64E+00 1.22E+01 U TV ONSI- 282331006 7/18/2011 Mn-54 9.14E-01 2.70E+00 9.15E+00 U TV ONSI- 282331006 7/18/2011 Nb-95 -1.16E-01 2.62E+00 8.43E+00 U TV ONSI- 282331006 -7/18/2011 Ru- 103 -6.82E+00 3.03E+00 7.67E+00 U TV ONSI- 282331006 7/18/2011 Ru-106 2.44E+00 2.5 1E+01 8.17E+01 U TV ONSI-ONS 1- 282331006 7/18/2011 Sb- 124 1.13E+00 5.75E+00 1.89E+01 U TV ONSI- 282331006 7/18/2011 Sb-125 5.66E+00 7.29E+00 2.41E+01 U TV ONSI- 282331006 7/18/2011 Se-75 -2.90E+00 3.32E+00 1.07E+01 U TV ONSI- 282331006 7/18/2011 Th-228 3.01E+00 8.91E+00 1.71E+01 U TV ONSI-'

282331006 7/18/2011 Zn-65 -6.91E-01 7.16E+00 2.37E+01 U TV 282331006 7/18/2011 Zr-95 2.49E+00 4.96E+00 1.62E+01 U TV 282331007 7/18/2011 Ac-228 1.26E+01 1.62E+01 4.25E+01 U OFS-V TV OFS-V 282331007 7/18/2011 Ag-108m -8.88E-01 2.21E+00 7.25E+00 U TV OFS-V 282331007 7/18/2011 Ag-I l0m -1.06E+00 2.29E+00 7.20E+00 U TV OFS-V 282331007 7/18/2011 Ba-140 -5.67E-00 3.77E+00 1.05E+01 U TV OFS-V 282331007 7/18/2011 Be-7 1.31E+03 8.12E+01 6.67E+01 TV OFS-V 282331007 7/18/2011 Ce-141 5.06E+00 3.85E+00 1.13E+01 U TV OFS-V 282331007 7/18/2011 Ce-I144 -2.30E+01 1.42E+01 4.22E+01 U TV OFS-V 282331007 7/18/2011 Co-57 6.39E-01 1.74E+00 5.87E+00 U TV OFS-V 282331007 7/18/2011 Co-58 -6.74E+00 4.18E+00 8.52E+00 U TV OFS-V 282331007 7/18/2011 Co-60 2.97E+00 3.18E+00 1.05E+01 U TV OFS-V 282331007 7/18/2011 Cr-51 -4.84E+01 2.28E+01 6.35E+01 U r TV OFS-V 282331007 7/18/2011 Cs-134 4.89E+00 3.24E+00 1.08E+01 U TV OFS-V 282331007 7/18/2011 Cs-137 3.55E+00 2.65E+00 8.56E+00 U TV OFS-V 282331007 7/18/2011 Fe-59 2.81E-01 5.5 1E+00 1.81E+01 U TV OFS-V 282331007 7/18/2011 1-131 2.35E+00 3.11E+00 1.05E+01 U TV OFS-V 282331007 7/18/2011 K-40 3.74E+03 2.09E+02 8.76E+01 TV OFS-V 282331007 7/18/2011 La-140 -5.67E+00 3.76E+00 1.05E+01 U TV OFS-V 282331007 7/18/2011 Mn-54 -1.15E-01 2.58E+00 8.62E+00 U TV OFS-V 282331007 7/18/2011 Nb-95 -3.64E+00 2.69E+00 8.19E+00 U TV OFS-V OFS-V 282331007 7/18/2011 Ru-103 -5.76E-01 2.46E+00 8.03E+00 U TV 282331007 7/18/2011 Ru-106 -2.04E-01 2.37E+01 7.69E+01 U D-109

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV OFS-V 282331007 7/18/2011 Sb-124 2.61E+00 5.81E+00 1.96E+01 U TV OFS-V 282331007 7/18/2011 Sb-125 -8.38E+00 6.54E+00 2.OOE+01 U TV OFS-V 282331007 7/18/2011 Se-75 4.94E+00 3.44E+00 1.08E+01 U TV OFS-V 282331007 7/18/2011 Th-228 3.24E+00 6.93E+00 1.69E+01 U TV OFS-V 282331007 7/18/2011 Zn-65 3.70E+00 6.69E+00 2.22E+01 U TV OFS-V 282331007 7/18/2011 Zr-95 9.80E-02 4.36E+00 1.47E+01 U TV ONS3- 284441001 7/18/2011 Ac-228 1.78E+02 5.45E+01 1.05E+02 UI TV ONS3- 284441001 7/18/2011 Ag-108m 8.09E-01 5.62E+00 1.85E+01 U TV ONS3- 284441001 7/18/2011 Ag-Il0m -5.50E-01 6.65E+00 1.91E+01 U TV ONS3- 284441001 7/18/2011 Ba-140 -4.34E+00 1.08E+01 3.41E+01 U TV ONS3- 284441001 7/18/2011 Be-7 4.59E+03 2.55E+02 1.67E+02 TV ONS3- 284441001 7/18/2011 Ce- 141 7.66E+00 1.31E+01 3.40E+01 U TV ONS3- 284441001 7/18/2011 Ce- 144 -8.03E+01 4.08E+01 1.14E+02 U TV ONS3- 284441001 7/18/2011 Co-57 7.78E+00 5.04E+00 1.60E+01 U TV ONS3- 284441001 7/18/2011 Co-58 5.15E+00 6.41E+00 1.93E+01 U TV ONS3- 284441001 7/18/2011 Co-60 -5.26E+00 6.56E+00 2.04E+01 U TV ONS3- 284441001 7/18/2011 Cr-51 -3.3 1E+01 5.87E+01 1.92E+02 U TV ONS3- 284441001 7/18/2011 Cs-134 5.72E+00 8.21E+00 2.47E+01 U TV ONS3- 284441001 7/18/2011 Cs-137 1.08E+02 1.30E+01 1.98E+01 TV ONS3- 284441001 7/18/2011 Fe-59 3.26E+00 1.24E+01 4.17E+01 U TV ONS3- 284441001 7/18/2011 1-131 1.33E+01 1.15E+01 3.79E+01 U TV ONS3- 284441001 7/18/2011 K-40 3.79E+03 2.60E+02 2.01E+02 TV ONS3- 284441001 7/18/2011 La-140 -4.34E+00 1.08E+01 3.41E+01 U TV ONS3- 284441001 7/18/2011 Mn-54 1.46E+01 6.90E+00 2.13E+01 U TV ONS3- 284441001 7/18/2011 Nb-95 3.16E+00 5.95E+00 1.99E+01 U TV ONS3- 284441001 7/18/2011 Ru-103 -9.09E+00 6.28E+00 1.82E+01 U TV ONS3- 284441001 7/18/2011 Ru-106 6.92E+01 5.52E+01 1.84E+02 U TV ONS3- 284441001 7/18/2011 Sb-124 -1.34E+01 1.41E+01 4.33E+01 U TV ONS3- 284441001 7/18/2011 Sb-125 1.63E+01 1.73E+01 5.69E+01 U TV ONS3- 284441001 7/18/2011 Se-75 -1.04E+01 8.34E+00 2.63E+01 U TV ONS3- 284441001 7/18/2011 Th-228 -3.1OE+01 1.58E+01 3.69E+01 U TV ONS3- 284441001 7/18/2011 Zn-65 -6.3 1E+00 1.38E+01 4.50E+01 U TV ONS3- 284441001 7/18/2011 Zr-95 2.04E+00 9.82E+00 3.27E+01 U TV ONS3- 284441002 7/18/2011 Ac-228 9.77E+00 2.61E+01 5.53E+01 U TV ONS3- 284441002 7/18/2011 Ag-108m -7.03E+00 3.59E+00 9.78E+00 U TV ONS3- 284441002 7/18/2011 Ag-Ilinm -3.98E+00 3.33E+00 1.03E+01 U TV ONS3- 284441002 7/18/2011 Ba- 140 6.77E+00 6.55E+00 2.22E+01 U TV ONS3- 284441002 7/18/2011 Be-7 3.12E+03 1.69E+02 9.83E+01 TV ONS3- 284441002 7/18/2011 Ce- 141 -1.60E+01 8.94E+00 1.96E+01 U TV ONS3- 284441002 7/18/2011 Ce- 144 -3.71E+01 2.36E+01 6.90E+01 U TV ONS3- 284441002 7/18/2011 Co-57 -1.57E-01 2.74E+00 8.96E+00 U TV ONS3- 284441002 7/18/2011 Co-58 -1.33E+00 3.75E+00 1.05E+01 U TV ONS3- 284441002 7/18/2011 Co-60 -9.68E+00 4.66E+00 1.19E+01 U TV ONS3- 284441002 7/18/2011 Cr-51 2.30E+00 3.42E+01 1.15E+02 U TV ONS3- 284441002 7/18/2011 Cs-134 1.07E+00 3.96E+00 1.33E+01 U TV ONS3- 284441002 7/18/2011 Cs-137 6.35E+00 3.98E+00 1.31E+01 U TV ONS3- 284441002 7/18/2011 Fe-59 -3.99E+00 7.70E+00 2.41E+01 U TV ONS3- 284441002 7/18/2011 1-131 -9.81E-01 7.16E+00 2.37E+01 U TV ONS3- 284441002 7/18/2011 K-40 1.09E+03 1.19E+02 8.85E+01 TV ONS3- 284441002 7/18/2011 La- 140 6.77E+00 6.55E+00 2.22E+01 U TV ONS3- 284441002 7/18/2011 Mn-54 -2.90E+00 3.33E+00 1.04E+01 U D-1 10

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3- 284441002 7/18/2011 Nb-95 -1.95E+00 3.88E+00 1.26E+01 TV ONS3- 284441002 7/18/2011 Ru-103 -7.8 1E+00 4.1OE+00 1.10E+01 TV ONS3- 284441002 7/18/2011 Ru-106 -1.67E+01 3.12E+01 1.03E+02 TV ONS3- 284441002 7/18/2011 Sb-124 -1.56E+00 7.98E+00 2.57E+01 TV ONS3- 284441002 7/18/2011 Sb-125 5.07E+00 9.57E+00 3.16E+01 TV ONS3- 284441002 7/18/2011 Se-75 4.43E+00 4.90E+00 1.65E+01 TV ONS3- 284441002 7/18/2011 Th-228 1.02E+01 1.01E+01 2.28E+01 TV ONS3- 284441002 7/18/2011 Zn-65 7.11E+00 7.90E+00 2.61E+01 TV ONS3- 284441002 7/18/2011 Zr-95 1.88E-01 5.90E+00 1.97E+01 TV ONS3- 284441003 7/18/2011 Ac-228 1.25E+01 3.70E+01 6.70E+01 TV ONS3- 284441003 7/18/2011 Ag-108m 1.52E+00 3.17E+00 1.06E+01 TV ONS3- 284441003 7/18/2011 Ag-Il0m -4.03E+00 4.82E+00 1.26E+01 TV ONS3- 284441003 7/18/2011 Ba- 140 1.52E+00 6.14E+00 2.05E+01 TV ONS3- 284441003 7/18/2011 Be-7 2.OOE+03 1.28E+02 1.08E+02 TV ONS3- 284441003 7/18/2011 Ce- 141 4.02E+00 4.26E+00 1.40E+01 TV ONS3- 284441003 7/18/2011 Ce- 144 -1.03E+01 1.57E+01 5.06E+01 TV ONS3- 284441003 7/18/2011 Co-57 -5.89E+00 2.35E+00 5.95E+00 TV ONS3- 284441003 7/18/2011 Co-58 -1.73E+00 3.95E+00 1.29E+01 TV ONS3- 284441003 7/18/2011 Co-60 -1.55E+01 7.44E+00 1.47E+01 TV ONS3- 284441003 7/18/2011 Cr-51 5.23E+01 3.30E+01 1.08E+02 TV ONS3- 284441003 7/18/2011 Cs-134 9.67E+00 5.50E+00 1.79E+01 TV ONS3- 284441003 7/18/2011 Cs-137 1.12E+01 6.17E+00 1.43E+01 TV ONS3- 284441003 7/18/2011 Fe-59 4.64E+00 8.99E+00 2.97E+01 TV ONS3- 284441003 7/18/2011 1-131 6.35E-01 5.92E+00 1.99E+01 TV ONS3- 284441003 7/18/2011 K-40 2.7 1E+03 1.81E+02 1.33E+02 TV ONS3- 284441003 7/18/2011 La-140 1.52E+00 6.14E+00 2.05E+01 TV ONS3- 284441003 7/18/2011 Mn-54 -1.22E+00 3.87E+00 1.27E+01 TV ONS3- 284441003 7/18/2011 Nb-95 2.14E+00 4.42E+00 1.50E+01 TV ONS3- 284441003 7/18/2011 Ru-103 1.67E+00 3.79E+00 1.25E+01 TV ONS3- 284441003 7/18/2011 Ru-106 -2.95E+00 3.77E+01 1.21E+02 TV ONS3- 284441003 7/18/2011 Sb-124 -8.01E-01 9.53E+00 3.10E+01 TV ONS3- 284441003 7/18/2011 Sb-125 -7.38E+00 9.56E+00 3.04E+01 TV ONS3- 284441003 7/18/2011 Se-75 1.91E+00 4.20E+00 1.35E+01 TV ONS3- 284441003 7/18/2011 Th-228 -6.87E+00 9.68E+00 2.27E+01 TV ONS3- 284441003 7/18/2011 Zn-65 -1.60E+00 1.08E+01 3.48E+01-TV ONS3- 284441003 7/18/2011 Zr-95 -2.27E+00 7.19E+00 2.38E+01 TV ONSI- 284441004 7/18/2011 Ac-228 -5.42E+01 2.90E+01 6.69E+01 TV ONSI- 284441004 7/18/2011 Ag-108m -5.21E+00 4.37E+00 1.07E+01 TV ONSI- 284441004 7/18/2011 Ag-Il0m 2.75E-03 4.16E+00 1.23E+01 TV ONSI- 284441004 7/18/2011 Ba-140 1.16E+01 7.80E+00 2.62E+01 TV ONSI- 284441004 7/18/2011 Be-7 2.09E+03 1.33E+02 1.12E+02 TV ONSI- 284441004 7/18/2011 Ce- 141 9.OOE+00 9.68E+00 1.69E+01 TV ONSI- 284441004 7/18/2011 Ce- 144 -5.39E+00 1.78E+01 5.94E+01 TV ONSI- 284441004 7/18/2011 Co-57 -1.31E+00 2.28E+00 7.54E+00 TV ONSl- 284441004 7/18/2011 Co-58 -5.46E+00 4.32E+00 1.30E+01 TV ONSI- 284441004 7/18/2011 Co-60 3.33E-01 4.69E+00 1.56E+01 TV ONSI- 284441004 7/18/2011 Cr-51 1.86E+01 3.52E+01 1.20E+02 TV ONS 1- 284441004 7/18/2011 Cs-134 5.5 1E+00 5.56E+00 1.86E+01 TV ONS I- 284441004 7/18/2011 Cs-137 9.83E+00 1.14E+01 1.45E+01 TV ONS 1- 284441004 7/18/2011 Fe-59 -2.07E+00 9.11E+00 2.90E+01 TV ONSI- 284441004 7/18/2011 1-131 2.50E+00 7.30E+00 2.47E+01 D-111

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONSI- 284441004 7/18/2011 K-40 1.72E+03 1.54E+02 1.40E+02 TV ONSI- 284441004 7/18/2011 La-140 1.16E+01 7.78E+00 2.62E+01 U TV ONSI- 284441004 7/18/2011 Mn-54 -1.90E+00 4.37E+00 1.42E+01 U TV ONSI- 284441004 7/18/2011 Nb-95 -7.68E+00 4.96E+00 1.45E+01 U TV ONSI- 284441004 7/18/2011 Ru-103 -9.34E-01 4.35E+00 1.41E+01 U TV ONSI- '284441004 7/18/2011 Ru-106 2.12E+01 3.99E+01 1.29E+02 U TV ONSI- 284441004 7/18/2011 Sb-124 -9.24E+00 1.05E+01 3.12E+01 U TV ONS 1- 284441004 7/18/2011 Sb-125 2.46E+00 1.07E+01 3.56E+01 U TV ONS 1- 284441004 7/18/2011 Se-75 1.36E+00 4.99E+00 1.61E+01 U TV ONS 1- 284441004 7/18/2011 Th-228 -8.70E+00 8.90E+00 2.27E+01 U TV ONS 1- 284441004 7/18/2011 Zn-65 -1.42E+00 1.02E+01 3.25E+01 U TV ONS 1- 284441004 7/18/2011 Zr-95 -1.15E+01 8.83E+00 2.68E+01 U TV ONSI- 284441005 7/18/2011 Ac-228 3.95E+00 1.57E+01 3.66E+01 U TV ONS 1- 284441005 7/18/2011 Ag-108m -4.61E+00 2.32E+00 6.53E+00 U TV ONSI- 284441005 7/18/2011 Ag-110m -4.46E+00 2.89E+00 7.06E+00 U TV ONSI- 284441005 7/18/2011 Ba- 140 -1.00E+01 4.99E+00 1.30E+01 U TV ONS 1- 284441005 7/18/2011 Be-7 4.77E+03 2.38E+02 6.04E+01 TV ONS 1- 284441005 7/18/2011 Ce-141 2.90E+00 3.99E+00 1.33E+01 U TV ONSI- 284441005 7/18/2011 Ce- 144 3.82E+00 1.39E+01 4.65E+01 U TV ONS 1- 284441005 7/18/2011 Co-57 2.42E+00 1.91E+00 6.24E+00 U TV ONS 1- 284441005 7/18/2011 Co-58 -3.28E+00 2.63E+00 7.7 1E+00 U TV ONS 1- 284441005 7/18/2011 Co-60 6.65E-01 2.76E+00 9.07E+00 U TV ONSI- 284441005 7/18/2011 Cr-51 -1.60E+01 2'.52E+01 7.91E+01 U TV ONS 1- 284441005 7/18/2011 Cs-134 -2.71E+00 2.94E+00 8.93E+00 U TV ONS 1- 284441005 7/18/2011 Cs-137 1.93E+01 5.03E+00 8.19E+00 M TV ONS I- 284441005 7/18/2011 Fe-59 4.95E+00 5.84E+00 1.94E+01 U TV ONSI- 284441005 7/18/2011 1-131 7.39E+00 5.18E+00 1.69E+01 U TV ONSI- 284441005 7/18/2011 K-40 3.12E+03 1.82E+02 7.86E+01 TV ONSI- 284441005 7/18/2011 La-140 -1.00E+01 4.97E+00 1.30E+01 U TV ONSI- 284441005 7/18/2011 Mn-54 -1.75E+00 2.37E+00 7.66E+00 U TV ONSI- 284441005 7/18/2011 Nb-95 5.33E+00 2.77E+00 8.53E+00 U TV ONSI- 284441005 7/18/2011 Ru-103 -1.55E+00 2.43E+00 7.84E+00 U TV ONSI- 284441005 7/18/2011 Ru-106 7.72E+00 2.26E+01 7.45E+01 U TV ONS 1- 284441005 7/18/2011 Sb-124 4.50E+00 5.01E+00 1.72E+01 U TV ONSI- 284441005 7/18/2011 Sb-125 5.81E+00 6.58E+00 2.20E+01 U TV ONSI- 284441005 7/18/2011 Se-75 -6.13E-01 3.52E+00 1.14E+01 U TV ONS 1- 284441005 7/18/2011 Th-228 -2.36E+00 6.03E+00 1.71E+01 U TV ONS 1- 284441005 7/18/2011 Zn-65 -1.43E+00 6.69E+00 1.88E+01 U TV ONS 1- 284441005 7/18/2011 Zr-95 2.54E+00 4.09E+00 1.34E+01 U TV ONS 1- 284441006 7/18/2011 Ac-228 -2.54E-01 1.69E+01 4.30E+01 U TV ONS 1- 284441006 7/18/2011 Ag-108m -4.04E+00 2.86E+00 8.39E+00 U TV ONS 1- 284441006 7/18/2011 Ag-110m -5.03E+00 3.05E+00 8.85E+00 U TV ONS I- 284441006 7/18/2011 Ba- 140 -9.59E+00 5.74E+00 1.57E+01 U TV ONS I- 284441006 7/18/2011 Be-7 2.OOE+03 1.16E+02 8.78E+01 TV ONS 1- 284441006 7/18/2011 Ce- 141 -8.65E+00 6.73E+00 1.67E+01 U TV ONSI- 284441006 7/18/2011 Ce- 144 1.39E+01 1.79E+01 5.99E+01 U TV ONSI- 284441006 7/18/2011 Co-57 1.07E-01 2.15E+00 7.25E+00 U TV ONS 1- 284441006 7/18/2011 Co-58 -2.67E+00 3.25E+00 8.61E+00 U TV ONS 1- 284441006 7/18/2011 Co-60 -3.47E-02 3.07E+00 1.03E+01 U TV ONS 1- 284441006 7/18/2011 Cr-51 -2.76E+01 3.03E+01 9.50E+01 U TV ONS 1- 284441006 7/18/2011 Cs-134 5.37EA-00 4.02E+00 1.23E+01 U D-112

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS I- 284441006 7/18/2011 Cs-137 2.97E+00 3.20E+00 1.07E+01 U TV ONSI- 284441006 7/18/2011 Fe-59 -3.15E+00 6.32E+00 2.OOE+01 U TV ONSI- 284441006 7/18/2011 1-131 2.8 1E+00 5.99E+00 1.96E+01 U TV ONSI- 284441006 7/18/2011 K-40 1.46E+03 1.06E+02 9.16E+01 TV ONSI- 284441006 7/18/2011 La-140 -9.59E+00 5.73E+00 1.57E+01 U TV ONSI- 284441006 7/18/2011 Mn-54 9.91 E-02 3.54E+00 9.93E+00 U TV ONSI- 284441006 7/18/2011 Nb-95 6.44E+00 3.43E+00 1.08E+01 U TV ONSI- 284441006 7/18/2011 Ru-103 -2.49E+00 3.26E+00 1.01E+01 U TV ONSI- 284441006 7/18/2011 Ru-106 -4.10E+01 2.87E+01 8.65E+01 U TV ONSI-ONS1- 284441006 7/18/2011 Sb-124 -1.3]E+01 7.66E+00 2.04E+01 U TV ONSI- 8.21E+00 284441006 7/18/2011 Sb-125 7.02E+00 2.67E+01 U TV ONSI- 284441006 7/18/2011 Se-75 3.60E+00 4.21E+00 1.38E+01 U TV ONSI- 284441006 7/18/2011 Th-228 4.79E-02 8.05E+00 2.12E+01 U TV ONS1- 284441006 7/18/2011 Zn-65 -5.59E+00 6.86E+00 2.11E+01 U TV ONSI- 284441006 7/18/2011 Zr-95 -2.96E+00 5.72E+00 1.85E+01 U TV OFS-V 284441007 7/18/2011 Ac-228 2.47E+01 2.67E+01 6.40E+01 U TV OFS-V 284441007 7/18/2011 Ag-108m 8.43E-01 3.39E+00 1.14E+01 U TV OFS-V 284441007 7/18/2011 Ag-Il0m 1.17E-01 4.17E+00 1.18E+0 1 U TV OFS-V 284441007 7/18/2011 Ba- 140 -4.38E+00 6.08E+00 1.85E+01 U TV OFS-V 284441007 7/18/2011 Be-7 3.23E+03 1.76E+-02 1.11E+02 TV OFS-V 284441007 7/18/2011 Ce-141 -9.22E+00 9.09E+00 2.24E+01 U TV OFS-V 284441007 7/18/2011 Ce- 144 2.08E+01 2.43E+01 7.94E+01 U TV OFS-V 284441007 7/18/2011 Co-57 7.93E+00 3.60E+00 1.06E+01 U TV OFS-V 284441007 7/18/2011 Co-58 -3.35E+00 4.08E+00 1.25E+01 U TV OFS-V 284441007 7/18/2011 Co-60 -4.77E+00 5.19E+00 1.49E+01 U TV OFS-V 284441007 7/18/2011 Cr-51 -3.04E+01 3.81E+01 1.25E+02 U TV OFS-V 284441007 7/18/2011 Cs-134 3.92E+00 5.93E+00 1.61E+01 U TV OFS-V 284441007 7/18/2011 Cs-137 8.58E+00 3.93E+00 1.32E+01 U TV OFS-V 284441007 7/18/2011 Fe-59 -6.43E+00 8.40E+00 2.67E+01 U TV OFS-V 284441007 7/18/2011 1-131 -7.92E+00 7.63E+00 2.43E+01 U TV OFS-V 284441007 7/18/2011 K-40 3.88E+03 2.40E+02 1.28E+02 TV OFS-V 284441007 7/18/2011 La-140 -4.38E+00 6.08E+00 1.85E+01 U TV OFS-V" 284441007 7/18/2011 Mn-54 6.05E+00 4.12E+00 1.31E+01 U TV OFS-V 284441007 7/18/2011 Nb-95 3.68E+00 4.05E+00 1.32E+01 U TV OFS-V 284441007 7/18/2011 Ru- 103 6.74E+00 4.33E+00 1.38E+01 U TV OFS-V 284441007 7/18/2011 Ru-106 -1.52E+01 3.50E+01 1.13E+02 U TV OFS-V 284441007 7/18/2011 Sb-124 -4.11E+00 8.98E+00 2.80E+01 U TV OFS-V 284441007 7/18/2011 Sb-125 -5.89E+00 1.04E+01 3.38E+01 U TV OFS-V 284441007 7/18/2011 Se-75 -2.OOE+00 5.28E+00 1.68E+01 U TV OFS-V 284441007 7/18/2011 Th-228 1.09E+01 1.28E+01 2.75E+01 U TV OFS-V 284441007 7/18/2011 Zn-65 2. 1OE+00 9.21 E+00 3.08E+01 U TV OFS-V 284441007 7/18/2011 Zr-95 -1.27E+01 7.21E+00 1.97E+01 U TV ONS3- 286496001 9/22/2011 Ac-228 1.61E+01 2.45E+01 6.76E+01 U TV ONS3- 286496001 9/22/2011 Ag-108m 2.45E+00 3.93E+00 .1.31E+01 U TV ONS3- 286496001 9/22/2011 Ag-Il0m -1.73E-01 4.21E+00 1.38E+01 U TV ONS3- 286496001 9/22/2011 Ba- 140 -1.17E+01 7.39E+00 2.03E+01 U TV ONS3- 286496001 9/22/2011 Be-7 3.45E+03 1.94E+02 1.27E+02 TV ONS3- 286496001 9/22/2011 Ce-141 -1.32E+01 9.45E+00 2.40E+01 U TV ONS3- 286496001 9/22/2011 Ce- 144 -1.00E+01 2.77E+01 8.91E+01 U TV ONS3- 286496001 9/22/2011 Co-57 -4.65E+00 3.69E+00 1.12E+01 U TV ONS3- 286496001 9/22/2011 Co-58 -5.99E-01 4.20E+00 1.36E+01 U D-113

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3- 286496001 9/22/2011 Co-60 -9.20E-01 4.81E+00 1.59E+01 U TV ONS3- 286496001 9/22/2011 Cr-51 -7.69E+01 4.82E+01 1.44E+02 U TV ONS3- 286496001 9/22/2011 Cs-134 -9.49E+00 5.96E+00 1.70E+01 U TV ONS3- 286496001 9/22/2011 Cs-137 2.36E+00 4.72E+00 1.57E+01 U TV ONS3- 286496001 9/22/2011 Fe-59 -1.07E+01 9.58E+00 2.84E+01 U TV ONS3- 286496001 9/22/2011 1-131 5.75E+00 8.35E+00 2.79E+01 U TV ONS3- 286496001 9/22/2011 K-40 2.88E+03 1.99E+02 1.18E+02 TV ONS3- 286496001 9/22/2011 La-140 -1.17E+01 7.37E+00 2.03E+01 U TV ONS3- 286496001 9/22/2011 Mn-54 1.38E+00 4.3 1E+00 1.42E+01 U TV ONS3- 286496001 9/22/2011 Nb-95 9.87E+00 5.OOE+00 1.56E+01 U TV ONS3- 286496001 9/22/2011 Ru-103 2.30E+00 4.34E+00 1.45E+01 U TV ONS3- 286496001 9/22/2011 Ru-106 -2.42E+01 3.75E+01 1.20E+02 U TV ONS3- 286496001 9/22/2011 Sb-124 3.03E+00 9.43E+00 3.17E+01 U TV ONS3- 286496001 9/22/2011 Sb-125 -2.76E+01 1.96E+01 3.94E+01 U TV ONS3- 286496001 9/22/2011 Se-75 5.42E+00 6.46E+00 2.15E+01 U TV ONS3- 286496001 9/22/2011 Th-228 6.33E+00 1.42E+01 3.04E+01 U TV ONS3- 286496001 9/22/2011 Zn-65 -5.35E+00 1.07E+01 3.37E+01 U TV ONS3- 286496001 9/22/2011 Zr-95 1.27E+01 8.28E+00 2.67E+01 U TV ONS3- 286496002 9/22/2011 Ac-228 3.48E+01 2.49E+01 5.03E+01 U TV ONS3- 286496002 9/22/2011 Ag-108m -6.36E-01 3.25E+00 1.05E+01 U TV ONS3- 286496002 9/22/2011 Ag-Ii0m 1.68E+00 3.58E+00 1.20E+01 U TV ONS3- 286496002 9/22/2011 Ba- 140 -4.13E+00 5.42E+00 1.68E+01 U TV *ONS3- 286496002 9/22/2011 Be-7 2.99E+03 1.64E+02 1.07E+02 TV ONS3- 286496002 9/22/2011 Ce- 141 -2.57E+01 9.58E+00 1.95E+01 U TV ONS3- 286496002 9/22/2011 Ce-144 2.19E+01 2.25E+01 7.48E+01 U TV ONS3- 286496002 9/22/2011 Co-57 -5.88E-02 2.84E+00 9.57E+00 U TV ONS3- 286496002 9/22/2011 Co-58 9.63E+00 4.61E+00 1.31E+01 U TV ONS3- 286496002 9/22/2011 Co-60 -2.02E+00 5.89E+00 1.40E+01 U TV ONS3- 286496002 9/22/2011 Cr-51 3.31E+01 3.72E+01 '1.22E+02 U TV ONS3- 286496002 9/22/2011 Cs-134 -1.63E+00 4.96E+00 1.38E+01 U TV ONS3- 286496002 9/22/2011 Cs-137 -5.53E+00 4.I1E+00 1.24E+01 U TV ONS3- 286496002 9/22/2011 Fe-59 -9.02E+/-00 7.66E+00 2.25E+01 U TV ONS3- 286496002 9/22/2011 1-131 1.92E-01 6.15E+00 2.01E+01 U TV ONS3- 286496002 9/22/2011 K-40 1.35E+03 1.30E+02 1.24E+02 TV ONS3- 286496002 9/22/2011 La-140 -4.13E+00 5.41E+00 1.68E+01 U TV ONS3-, 286496002 9/22/2011 Mn-54 -1.51E+00 3.69E+00 1.19E+01 U TV ONS3- 286496002 9/22/2011 Nb-95 2.75E+00 3.62E+00 1.21E+01 U TV ONS3- 286496002 9/22/2011 Ru-103 -3.20E+00 3.80E+00 1.17E+01 U TV ONS3- 286496002 9/22/2011 Ru-106 -3.77E+01 3.53E+01 1.11E+02 U TV ONS3- 286496002 9/22/2011 Sb-124 4.OOE+00 8.58E+00 2.89E+01 U TV ONS3- 286496002 9/22/2011 Sb-125 -1.76E+01 1.1OE+01 3.15E+01 U TV ONS3- 286496002 9/22/2011 Se-75 -1.44E+00 5.17E+00 1.69E+01 U TV ONS3- 286496002 9/22/2011 Th-228 4.25E+00 1.38E+01 2.78E+01 U TV ONS3- 286496002 9/22/2011 Zn-65 -1.93E+01 9.60E+00 2.47E+01 U TV ONS3- 286496002 9/22/2011 Zr-95 -5.92E+00 6.47E+00 2.02E+01 U TV ONS3- 286496003 9/22/2011 Ac-228 1.41E+02 2.86E+01 4.76E+01 TV ONS3- 286496003 9/22/2011 Ag-108m 3.14E+00 3.64E+00 1.18E+01 U TV ONS3- 286496003 9/22/2011 Ag-Il0m 2.63E-01 3.85E+00 1.13E+01 U TV ONS3- 286496003 9/22/2011 Ba- 140 -9.12E+00 5.35E+00 1.41E+01 U TV ONS3- 286496003 9/22/2011 Be-7 3.02E+03 1.67E+02 1.08E+02 TV ONS3- 286496003 9/22/2011 Ce-141 1.26t-+01 6.38E+00 1.98E+01 U D-114

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS3- 286496003 9/22/2011 Ce- 144 2.71E+01 2.25E+01 7.42E+01 TV ONS3- 286496003 9/22/2011 Co-57 -2.59E+00 2.75E+00 8.95E+00 TV ONS3- 286496003 9/22/2011 Co-58 -8.70E-01 3.77E+00 1.24E+01 TV ONS3- 286496003 9/22/2011 Co-60 1.21E+00 4.42E+00 1.44E+01 TV ONS3- 286496003 9/22/2011 Cr-51 -4.18E+01 3.60E+01 1.1OE+02 TV ONS3- 286496003 9/22/2011 Cs-134 4.13E+00 5.99E+00 1.66E+01 TV ONS3- 286496003 9/22/2011 Cs-137 1.56E+02 1.26E+01 1.33E+01 TV ONS3- 286496003 9/22/2011 Fe-59 -2.36E+01 9.64E+00 2.13E+01 TV ONS3- 286496003 9/22/2011 1-131 6.46E+00 6.15E+00 2.OOE+01 TV ONS3- 286496003 9/22/2011 K-40 2.59E+03 1.73E+02 1.09E+02 TV ONS3- 286496003 9/22/2011 La-140 -9.12E+00 5.33E+00 1.41E+01 TV ONS3- 286496003 9/22/2011 Mn-54 -6.67E+00 4.20E+00 1.21E+01 TV ONS3- 286496003 9/22/2011 Nb-95 5.20E+00 4.01E+00 1.33E+01 TV ONS3- 286496003 9/22/2011 Ru-103 3.57E+00 3.80E+00 1.23E+01 TV ONS3- 286496003 9/22/2011 Ru-106 -2.33E+01 3.56E+01 1.16E+02 TV ONS3- 286496003 9/22/2011 Sb-124 -3.40E-01 7.80E+00 2.58E+01 TV ONS3- 286496003 9/22/2011 Sb-125 7.40E+00 1.05E+01 3.42E+01 TV ONS3- 286496003 9/22/2011 Se-75 -3.43E+00 4.84E+00 1.55E+01 TV ONS3- 286496003 9/22/2011 Th-228 3.69E+00 1.26E+01 2.35E+01 TV ONS3- 286496003 9/22/2011 Zn-65 7.32E+00 1.05E+01 3.02E+01 TV ONS3- 286496003 9/22/2011 Zr-95 1.97E+00 6.69E+00 2.25E+01 TV ONS 1- 286496004 9/22/2011 Ac-228 1.05E+01 2.04E+0i 5.56E+01 TV ONSI- 286496004 9/22/2011 Ag-108m 3.44E+00 3.49E+00 1.15E+01 TV ONS 1- 286496004 9/22/2011 Ag-Il0m -1.82E+00 3.37E+00 1.08E+01 TV ONSI- 286496004 9/22/2011 Ba-140 -5.26E+00 5.40E+00 1.64E+01 TV ONSI- 286496004 9/22/2011 Be-7 3.16E+03 1.74E+02 1.09E+02 TV ONS 1- 286496004 9/22/2011 Ce- 141 -2.94E+00 7.58E+00 2.10E+01 TV ONS 1- 286496004 9/22/2011 Ce-I144 3.42E+01 2.57E+01 8.09E+01 TV ONSi- 286496004 9/22/2011 Co-57 -5.20E-01 3.11E+00 1.01E+01 TV ONSi- 286496004 9/22/2011 Co-58 -1.14E+01 4.80E+00 1.17E+01 TV ONSI- 286496004 9/22/2011 Co-60 -1.31E+00 4.22E+00 1.38E+01 TV ONSI- 286496004 9/22/2011 Cr-51 5.31E+00 3.63E+01 1.22E+02 TV ONSI- 286496004 9/22/2011 Cs-134 3.86E-01 4.79E+00 1.57E+01 TV ONSI- 286496004 9/22/2011 Cs-137 1.99E+00 3.86E+00 1.28E+01 TV ONSI- 286496004 9/22/2011 Fe-59 -1.29E+01 8.85E+00 2.52E+01 TV ONSI- 286496004 9/22/2011 1-131 -3.15E+00 6.37E+00 2.09E+01 TV ONSI- 286496004 9/22/2011 K-40 2.61E+03 1.79E+02 1.37E+02 TV ONS I- 286496004 9/22/2011 La-140 -5.26E+00 5.40E+00 1.64E+01 TV ONS I- 286496004 9/22/2011 Mn-54 4.82E+00 3.88E+00 1.27E+01 TV ONS I- 286496004 9/22/2011 Nb-95 8.34E+00 4.23E+00 1.32E+01 TV ONS I- 286496004 9/22/2011 Ru-103 -6. 1OE+00 3.96E+00 1.16E+0I TV ONS I- 286496004 9/22/2011 Ru-106 2.48E+01 3.49E+01 1.16E+02 TV ONS I- 286496004 9/22/2011 Sb-124 2.61E-02 7.72E+00 2.56E+01 TV ONSI- 286496004 9/22/2011 Sb-125 -2.89E+01 1.71E+01 3.22E+01 TV ONS 1- 286496004 9/22/2011 Se-75 -2.96E+00 5.47E+00 1.80E+01 TV ONS 1- 286496004 9/22/2011 Th-228 1.38E+01 1.07E+01 2.66E+01 TV ONS 1- 286496004 9/22/2011 Zn-65 3.71E+00 9.96E+00 3.26E+01 TV ONSI- 286496004 9/22/2011 Zr-95 -4.90E+00 7.13E+00 2.25E+01 TV ONS 1- 286496005 9/22/2011 Ac-228 2.20E+01 2.66E+01 5.76E+01 TV ONS 1- 286496005 9/22/2011 Ag-108m -5.36E-01 3.37E+00 1.1IE+01 TV ONS 1- 286496005 9/22/2011 Ag-ll0m -6.86E+00 4.18E+00 1.17E+0I D-115

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV ONS 1- 286496005 9/22/2011 Ba- 140 6.36E+00 5.71E+00 1.92E+01 U TV ONS I- 286496005 9/22/2011 Be-7 2.21E+03 1.37E+02 1.01E+02 TV ONSI- 286496005 9/22/2011 Ce- 141 4.67E+00 5.75E+00 1.85E+01 U TV ONSI- 286496005 9/22/2011 Ce- 144 -2.42E+01 2.20E+01 6.72E+01 U TV ONS 1- 286496005 9/22/2011 Co-57 -1.41E+00 2.90E+00 9.24E+00 U TV ONS 1- 286496005 9/22/2011 Co-58 -4.58E+00 6.21E+00 1.32E+01 U TV ONSI- 286496005 9/22/2011 Co-60 1.62E+00 4.15E+00 1.38E+01 U TV ONSI- 286496005 9/22/2011 Cr-51 7.69E+00 3.19E+01 1.07E+02 U TV ONS 1- 286496005 9/22/2011 Cs-134 -1.11E+00 5.70E+00 1.67E+01 U TV ONSI- 286496005 9/22/2011 Cs-137 7.18E+00 4.57E+00 1.45E+01 U TV ONS 1- 286496005 9/22/2011 Fe-59 -1.02E+01 8.01E+00 2.38E+01 U TV ONSI- 286496005 9/22/2011 1-131 -1.08E+01 7.03E+00 1.89E+01 U TV ONSI- 286496005 9/22/2011 K-40 2.53E+03 1.65E+02 1.23E+02 TV ONSI- 286496005 9/22/2011 La-140 6.36E+00 5.71E+00 1.92E+01 U TV ONSI- 286496005 9/22/2011 Mn-54 -2.34E+00 3.77E+00 1.22E+01 U TV ONS 1- 286496005 9/22/2011 Nb-95 -4.06E+00 4.13E+00 1.24E+01 U TV ONSI- 286496005 9/22/2011 Ru-103 -1.21E+00 3.75E+00 1.21E+01 U TV ONS 1- 286496005 9/22/2011 Ru-106 -1.10E+02 4.37E+01 1.02E+02 U TV ONSI- 286496005 9/22/2011 Sb-124 2.95E+00 9.46E+00 3.12E+01 U TV ONSI- 286496005 9/22/2011 Sb-125 5.61E+00 9.97E+00 3.31E+01 U TV ONSI- 286496005 9/22/2011 Se-75 -4.11E+00 4.66E+00 1.50E+01 U TV ONSI- 286496005 9/22/2011 Th-228 8.02E+00 1.05E+01 2.53E+01 U TV ONSI- 286496005 9/22/2011 Zn-65 -2.52E+01 1.10E+01 2.72E+01 U TV ONSI- 286496005 9/22/2011 Zr-95 -4.25E+00 7.34E+00 2.29E+01 U TV ONSI- 286496006 9/22/2011 Ac-228 -3.15E+01 2.45E+01 6.17E+01 U TV ONSI- 286496006 9/22/2011 Ag-108m 2.22E+00 3.63E+00 1.21E+01 U TV ONSI- 286496006 9/22/2011 Ag-Il0m -5.19E+01 1.33E+01 1.33E+01 U TV ONS 1- 286496006 9/22/2011 Ba- 140 -5.66E+00 8.27E+00 2.55E+01 U TV ONSI- 286496006 9/22/2011 Be-7 1.94E+03 1.33E+02 1.23E+02 TV ONSI- 286496006 9/22/2011 Ce- 141 -1.10E+01 8.20E+00 1.67E+01 U TV ONSI- 286496006 9/22/2011 Ce-I144 -9.27E+00 1.77E+01 5.85E+01 U TV ONS 1- 286496006 9/22/2011 Co-57 -1.83E+00 2.26E+00 7.39E+00 U TV ONSI- 286496006 9/22/2011 Co-58 2.97E+00 4.53E+00 1.52E+01 U TV ONS 1- 286496006 9/22/2011 Co-60 1.44E+00 4.42E+00 1.49E+01 U TV ONS 1- 286496006 9/22/2011 Cr-51 -1.22E+01 3.55E+01 1.19E+02 U TV ONSI- 286496006 9/22/2011 Cs-134 9.69E+00 5.58E+00 1.81E+01 U TV ONSI- 286496006 9/22/2011 Cs-137 -8.52E+00 8. 1OE+00 2.50E+01 U TV ONSI- 286496006 9/22/2011 Fe-59 -4.52E+00 8.99E+00 2.81E+01 U TV ONSI- 286496006 9/22/2011 1-131 -9.99E+00 7.72E+00 2.39E+01 U TV ONSI- 286496006 9/22/2011 K-40 1.57E+03 1.51E+02 1.43E+02 TV ONSI- 286496006 9/22/2011 La-140 -5.66E+00 8.27E+00 2.55E+01 U TV ONSI- 286496006 9/22/2011 Mn-54 1.97E+00 4.33E+00 1.45E+01 U TV ONS I- 286496006 9/22/2011 Nb-95 5.53E+00 4.25E+00 1.42E+01 U TV ONS I- 286496006 9/22/2011 Ru-103 5.36E+00 4.28E+00 1.39E+01 U TV ONS 1- 286496006 9/22/2011 Ru-106 -6.44E+01 3.99E+01 1.11E+02 U TV ONS 1- 286496006 9/22/2011 Sb-124 5.13E+00 1.04E+01 3.44E+01 U TV ONS I- 286496006 9/22/2011 Sb-125 -2.05E+01 1.13E+01 3.20E+01 U TV ONSI- 286496006 9/22/2011 Se-75 2.70E+00 4.96E+00 1.60E+01 U TV ONSI- 286496006 9/22/2011 Th-228 3.53E+00 1:20E+01 2.33E+01 U TV ONS 1- 286496006 9/22/2011 Zn-65 -1.34E+01 1.12E+01 3.27E+01 U TV ONSI- 286496006 9/22/2011 Zr-95 3.43E+00 7.62E+00 2.57E+01 U D-1 16

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TV OFS-V 286496007 9/22/2011 Ac-228 -1.39E+01 2.21E+01 5.44E+01 U TV OFS-V 286496007 9/22/2011 Ag-108m -5.67E+00 4.34E+00 1.07E+01 U TV OFS-V 286496007 9/22/2011 Ag-Il0m -1.49E+00 3.3 1E+00 1.06E+01 U TV OFS-V 286496007 9/22/2011 Ba-140 -6.04E+00 6.44E+00 1.96E+01 U TV OFS-V 286496007 9/22/2011 Be-7 2.76E+03 1.58E+02 9.98E+01 TV OFS-V 286496007 9/22/2011 Ce-I141 -1.42E+01 8.66E+00 2.10E+01 U TV OFS-V 286496007 9/22/2011 Ce-I144 2.32E+00 2.28E+01 7.28E+01 U TV OFS-V 286496007 9/22/2011 Co-57 3.66E+00 3.02E+00 9.5 1E+00 U TV OFS-V 286496007 9/22/2011 Co-58 -1.89E+00 3.84E+00 1.21E+01 U TV OFS-V 286496007 9/22/2011 Co-60 -2.41E-01 4. I OE+00 1.33E+01 U TV OFS-V 286496007 9/22/2011 Cr-51 1.68E+00 3.46E+0 1 1.13E+02 U TV OFS-V 286496007 9/22/2011 Cs-134 6.20E+00 4.70E+00 1.53E+01 U TV OFS-V 286496007 9/22/2011 Cs-137 -2.21E+00 3.58E+00 1.13E+01 U TV OFS-V 286496007 9/22/2011 Fe-59 4.01E+00 7.50E+00 2.53E+01 U TV OFS-V 286496007 9/22/2011 1-131 -1.14E+01 7.89E+00 2.30E+01 U TV OFS-V 286496007 9/22/2011 K-40 1.49E+03 1.20E+02 1.06E+02 TV OFS-V 286496007 9/22/2011 La-140 -6.04E+00 6.44E+00 1.96E+01 U TV OFS-V 286496007 9/22/2011 Mn-54 2.61E+00 3.96E+00 1.30E+01 U TV OFS-V 286496007 9/22/2011 Nb-95 -1.74E+00 4.77E+00 1.28E+01 U TV OFS-V 286496007 9/22/2011 Ru-103 1.47E+00 3.63E+00 1.23E+01 U TV OFS-V 286496007 9/22/2011 Ru-106 -1.78E+01 3.27E+01 1.05E+02 U TV OFS-V 286496007 9/22/2011 Sb-124 7.75E+00 8.72E+00 3.OOE+01 U TV OFS-V 286496007 9/22/2011 Sb-125 -1.34E+01 1.09E+01 3.20E+01 U TV OFS-V 286496007 9/22/2011 Se-75 -1.14E+00 4.70E+00 1.54E+01 U TV OFS-V 286496007 9/22/2011 Th-228 2.49E+00 1.39E+01 3.27E+01 U TV OFS-V 286496007 9/22/2011 Zn-65 -1.41E+01 9.30E+00 2.66E+01 U TV OFS-V 286496007 9/22/2011 Zr-95 9.63E+00 6.49E+00 2.12E+01 U D-1 17

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 270374023 1/12/2011 Ac-228 4.74E-01 6.01E+00 1.17E+01 U WD STJ 270374023 1/12/2011 Ag-108m 5.42E-01 6.41E-01 2.17E+00 U WD STJ 270374023 1/12/2011 Ag-Il0m -3.36E-01 7.32E-01 2.3 1E+00 U WD STJ 270374023 1/12/2011 Ba- 140 -7.19E-01 3.5 1E+00 1.14E+01 U WD STJ 270374023 1/12/2011 Be-7 2.75E+00 6.36E+00 2.12E+01 U WD STJ 270374023 1/12/2011 BETA 4.OOE+00 1.34E+00 3.61E+00 WD STJ 270374023 1/12/2011 Ce- 141 -2.86E-02 1.07E+00 3.5 1E+00 U WD STJ 270374023 1/12/2011 Ce- 144 -3.56E+00 3.74E+00 1.21E+01 U WD STJ 270374023 1/12/2011 Co-57 1.44E-01 4.87E-01 1.62E+00 U WD STJ 270374023 1/12/2011 Co-58 4.97E-01 7.81E-01 2.67E+00 U WD STJ 270374023 1/12/2011 Co-60 -3.40E-02 8.22E-01 2.76E+00 U WD STJ 270374023 1/12/2011 Cr-51 2.29E+00 5.97E+00 2.03E+01 U WD STJ 270374023 1/12/2011 Cs-134 1.20E+00 8.29E-01 2.92E+00 U WD STJ 270374023 1/12/2011 Cs-137 -1.38E+00 8.50E-01 2.55E+00 U WD STJ 270374023 1/12/2011 Fe-59 3.64E-01 1.79E+00 5.90E+00 U WD STJ 270374023 1/12/2011 1-131 2.29E+00 1.11E+00 3.88E+00 U WD STJ 270374023 1/12/2011 K-40 -1.70E+01 1.29E+01 3.19E+01 U WD STJ 270374023 1/12/2011 La-140 6.76E-0 1 1.20E+00 4.1OE+00 U WD STJ 270374023 1/12/2011 Mn-54 2.OOE-01 7.99E-01 2.69E+00 U WD STJ 270374023 1/12/2011 Nb-95 -1.34E-01 7.97E-01 2.66E+00 U WD STJ 270374023 1/12/2011 Ru-103 -1.81E+00 7.94E-01 2.38E+00 U WD STJ 270374023 1/12/2011 Ru-106 7.55E+00 6.61 E+00 2.22E+01 U WD STJ 270374023 1/12/2011 Sb-124 2.95E-01 2.05E+00 6.80E+00 U WD STJ 270374023 1/12/2011 Sb-125 -2.73E+00 1.89E+00 5.98E+00 U WD STJ 270374023 1/12/2011 Se-75 -1.08E+00 8.86E-01 2.72E+00 U WD STJ 270374023 1/12/2011 Th-228 -6.60E-02 2.1OE+00 5.03E+00 U WD STJ 270374023 1/12/2011 Zn-65 -1.77E+00 1.74E+00 5.39E+00 U WD STJ 270374023 1/12/2011 Zr-95 -5.64E-01 1.40E+00 4.65E+00 U WD STJ 270374024 1/12/2011 1-131 -2.83E-02 1.85E-01 5.94E-01 U WD LTW 270374025 1/12/2011 Ac-228 -1.60E-01 5.11 E+00 1.26E+01 U WD LTW 270374025 1/12/2011 Ag-108m -9.33E-01 6.11E-01 1.92E+00 U WD LTW 270374025 1/12/2011 Ag-110m -8.46E-01 8.26E-01 2.55E+00 U WD LTW 270374025 1/12/2011 Ba-140 1.52E+00 3.87E+00 1.28E+01 U WD LTW 270374025 1/12/2011 Be-7 5.70E+00 6.23E+00 2.1OE+01 U WD LTW 270374025 1/12/2011 BETA 5.06E+00 1.35E+00 3.73E+00 WD LTW 270374025 1/12/2011 Ce- 141 1.38E-01 1.16E+00 3.43E+00 U WD LTW 270374025 1/12/2011 Ce- 144 4.01E-01 3.82E+00 1.26E+01 U WD LTW 270374025 1/12/2011 Co-57 -6.63E-02 4.89E-01 1.62E+00 U WD LTW 270374025 1/12/2011 Co-58 9.49E-01 7.75E-01 2.71E+00 U WD LTW 270374025 1/12/2011 Co-60 1.71E-01 8.50E-01 2.88E+00 U WD LTW 270374025 1/12/2011 Cr-51 7.79E+00 6.23E+00 2.16E+01 U WD LTW 270374025 1/12/2011 Cs-134 4.94E-01 8.39E-01 2.80E+00 U WD LTW 270374025 1/12/2011 Cs-137 1.70E+00 9.20E-01 3.12E+00 U WD LTW 270374025 1/12/2011 Fe-59 -1.55E-01 1.69E+00 5.49E+00 U WD LTW 270374025 1/12/2011 1-131 -1.61E+00 1.23E+00 3.96E+00 U WD LTW 270374025 1/12/2011 K-40 -2.20E+01 1.32E+01 3.27E+01 U WD LTW 270374025 1/12/2011 La- 140 -7.12E-01 1.49E+00 4.81E+00 U WD LTW 270374025 1/12/2011 Mn-54 -1.01E-01 7.89E-01 2.62E+00 U WD LTW 270374025 1/12/2011 Nb-95 1.95E+00 8.35E-01 3.OOE+00 U WD LTW 270374025 1/12/2011 Ru-103 -1.40E+00 8.13E-01 2.50E+00 U WD LTW 270374025 1/12/2011 Ru-106 -3.17E+00 6.79E+00 2.15E+01 U D-1 18

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 270374025 1/12/2011 Sb-124 6.01E-01 1.78E+00 5.98E+00 WD LTW 270374025 1/12/2011 Sb-125 -1.47E+00 1.96E+00 6.35E+00 WD LTW 270374025 1/12/2011 Se-75 -2.18E-01 9.23E-01 2.91E+00 WD LTW 270374025 1/12/2011 Th-228 3.94E-01 2.44E+00 4.07E+00 WD LTW 270374025 1/12/2011 Zn-65 -1.99E+00 1.99E+00 5.20E+00 WD LTW 270374025 1/12/2011 Zr-95 -1.84E-01 1.28E+00 4.28E+00 WD LTW 270374026 1/12/2011 1-131 9.91E-02 1.37E-01 4.55E-01 WD STJ 271263023 1/26/2011 Ac-228 -4.85E+00 4.3 1E+00 8.95E+00 WD STJ 271263023 1/26/2011 Ag-108m -1.75E-01 6.OOE-01 1.97E+00 WD STJ 271263023 1/26/2011 Ag-110m -3.45E+00 1.06E+00 1.87E+00 WD STJ 271263023 1/26/2011 Ba- 140 -7.07E-01 1.05E+00 3.36E+00 WD STJ 271263023 1/26/2011 Be-7 -1.45E+00 5.81E+00 1.90E+01 WD STJ 271263023 1/26/2011 BETA 1.58E+00 1.04E+00 2.87E+00 WD STJ 271263023 1/26/2011 Ce-141 2.84E-04 1.26E+00 3.97E+00 WD STJ 271263023 1/26/2011 Ce- 144 5.12E+00 4.61E+00 1.49E+01 WD STJ 271263023 1/26/2011 Co-57 -1.50E-01 5.88E-01 1.93E+00 WD STJ 271263023 1/26/2011 Co-58 4.57E-01 5.97E-01 2.02E+00 WD STJ 271263023 1/26/2011 Co-60 -5.26E-01 6.60E-01 2.03E+00 WD STJ 271263023 1/26/2011 Cr-51 -8.41E+00 6.60E+00 2.06E+01 WD STJ 271263023 1/26/2011 Cs-134 6.80E-01 7.69E-01 2.60E+00 WD STJ 271263023 1/26/2011 Cs-137 -5.84E-01 1.14E+00 2.79E+00 WD STJ 271263023 1/26/2011 Fe-59 6.12E-01 1.34E+00 4.46E+00 WD STJ 271263023 1/26/2011 1-131 -1.39E-01 1.20E+00 3.99E+00 WD STJ 271263023 1/26/2011 K-40 1.73E+01 8.03E+00 2.49E+01 WD STJ 271263023 1/26/2011 La-140 -7.07E-01 1.05E+00 3.36E+00 WD STJ 271263023 1/26/2011 Mn-54 1.O1E+00 6.34E-01 2.08E-00 WD STJ 271263023 1/26/2011 Nb-95 -2.53E-01 5.94E-01 1.87E+00 WD STJ 271263023 1/26/2011 Ru-103 -4.60E-01 6.89E-01 2.20E+00 WD STJ 271263023 1/26/2011 Ru-106 -1.10E+00 5.68E+00 1.84E+01 WD STJ 271263023 1/26/2011 Sb-124 5.93E-01 1.60E+00 5.40E+00 WD STJ 271263023 1/26/2011 Sb-125 -6.93E-01 1.82E+00 5.97E+00 WD STJ 271263023 1/26/2011 Se-75 -1.86E+00 1.05E+00 2.94E+00 WD STJ 271263023 1/26/2011 Th-228 3.02E+00 2.63E+00 4.69E+00 WD STJ 271263023 1/26/2011 Zn-65 -3.19E+00 .1.51E+00 3.90E+00 WD STJ 271263023 1/26/2011 Zr-95 -3.77E-01 1.05E+00 3.32E+00 WD STJ 271263024 1/26/2011 1-131 3.24E-02 1.65E-01 5.58E-01 WD LTW 271263025 1/26/2011 Ac-228 5.59E'01 4.49E+00 9.56E+00 WD LTW 271263025 1/26/2011 Ag-108m -3.80E-01 6.06E-01 1.90E+00 WD LTW 271263025 1/26/2011 Ag-110m -6.32E-01 6.22E-01 1.93E+00 WD LTW 271263025 1/26/2011 Ba-140 1.47E-01 1.1 6E+00 3.90E+00 WD LTW 271263025 1/26/2011 Be-7 6.26E+00 5.84E+00 1.96E+01 WD LTW 271263025 1/26/2011 BETA 1.43E+00' 1.01E+00 2.86E+00 WD LTW 271263025 1/26/2011 Ce- 141 -3.37E-01 1.22E+00 3.89E+00 WD LTW 271263025 1/26/2011 Ce- 144 -4.52E+00 4.67E+00 1.43E+01 WD LTW 271263025 1/26/2011 Co-57 6.03E-01 5.97E-01 1.90E+00 WD LTW 271263025 1/26/2011 Co-58 3.66E-01 6.61E-01 2.17E+00 WD LTW 271263025 1/26/2011 Co-60 -2.40E-01 6.71E-01 2.15E+00 WD LTW 271263025 1/26/2011 Cr-51 4.29E+00 6.42E+00 2.1]E+01 WD LTW 271263025 1/26/2011 Cs-134 -1.23E+00 8.40E-01 2.43E+00 WD LTW 271263025 1/26/2011 Cs-137 -5.59E-01 7.02E-01 2.23E+00 WD LTW 271263025 1/26/2011 Fe-59 -3.89E-01 1.26E+00 4.14E+00 D-1 19

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 271263025 1/26/2011 1-131 9.92E-01 1.29E+00 4.21E+00 U WD LTW 271263025 1/26/2011 K-40 -2.08E+01 1.18E+01 2.73E+01 U WD LTW 271263025 1/26/2011 La-140 1.47E-01 1.16E+00 3.90E+00 U WD LTW 271263025 1/26/2011 Mn-54 -4.18E-01 6.20E-01 1.94E+00 U WD LTW 271263025 1/26/2011 Nb-95 5.26E-01 6.29E-01 2.08E+00 U WD LTW 271263025 1/26/2011 Ru-103 -8.20E-02 6.79E-01 2.28E+00 U WD LTW 271263025 1/26/2011 Ru-106 7.15E-01 5.49E+00 1.83E+01 U WD LTW 271263025 1/26/2011 Sb-124 -7.18E-01 1.74E+00 5.64E+00 U WD LTW 271263025 1/26/2011 Sb-125 1.09E+00 1.87E+00 6.05E+00 U WD LTW 271263025 1/26/2011 Se-75 1.35E+00 9.65E-01 3.1OE+00 U WD LTW 271263025 1/26/2011 Th-228 1.91E+00 2.31 E+00 4.63E+00 U WD LTW 271263025 1/26/2011 Zn-65 -2.20E+00 1.50E+00 4.39E+00 U WD LTW 271263025 1/26/2011 Zr-95 -7.91E-01 1.19E+00 3.76E+00 U WD LTW 271263026 1/26/2011 1-131 9.80E-02 2.10E-01 6.91E-01 U WD STJ 272128023 2/9/2011 Ac-228 -8.65E+00 4.2 1E+00 7.79E+00 U WD STJ 272128023 2/9/2011 Ag-108m 6.95E-01 5.55E-01 1.76E+00 U WD STJ 272128023 2/9/2011 Ag-i10m -6.46E-01 5.62E-01 1.73E+00 U WD STJ 272128023 2/9/2011 Ba-140 -3.46E-02 1.07E+00 3.48E+00. U WD STJ 272128023 2/9/2011 Be-7 -2.04E+00 5.03E+00 1.68E+01 U WD STJ 272128023 2/9/2011 BETA 2.02E+00 1.21E+00 3.58E+00 U WD STJ 272128023 2/9/2011 Ce- 141 -2.58E+00 1.16E+00 3.25E+00 U WD STJ 272128023 2/9/2011 Ce- 144 3.06E+00 4.OOE+00 1.26E+01 U WD STJ 272128023 2/9/2011 Co-57 -4.71E-01 5.24E-01 1.60E+00 U WD STJ 272128023 2/9/2011 Co-58 5.33E-01 5.82E-01 1.91E+00 U WD STJ 272128023 2/9/2011 Co-60 -6.53E-01 6.26E-01 1.91E+00 U WD STJ 272128023 2/9/2011 Cr-51 8.33E+00 5.74E+00 1.82E+01 U WD STJ 272128023 2/9/2011 Cs-134 1.25E+00 7.49E-01 2.38E+00 U WD STJ 272128023 2/9/2011 Cs-137 1.67E+00 6.84E-01 2.02E+00 U WD STJ 272128023' 2/9/2011 Fe-59 -1.38E+00 1.16E+00 3.55E+00 U WD STJ 272128023 2/9/2011 1-131 7.05E-01 1.14E+00 3.72E+00 U WD STJ 272128023 2/9/2011 K-40. 6.74E+00 1.43E+01 1.69E+01 U WD STJ 272128023 2/9/2011 La-140 -3.46E-02 1.07E+00 3.48E+00 U WD STJ 272128023 2/9/2011 Mn-54 1.16E-02 5.52E-01 1.80E+00 U WD STJ 272128023 2/9/2011 Nb-95 9.37E-01 6.35E-01 2.04E+00 U WD STJ 272128023 2/9/2011 Ru-I103 4.37E-01 5.97E-01 2.01E+00 U wb STJ 272128023 2/9/2011 Ru-106 6.34E+00 5.18E+00 1.71E+01 U WD STJ 272128023 2/9/2011 Sb- 124 1.10E+00 1.42E+00 4.70E+00 U WD STJ 272128023 2/9/2011 Sb-125 8.77E-01 1.67E+00 5.38E+00 U WD STJ 272128023 2/9/2011 Se-75 3.62E-01 7.88E-01 2.61E+00 U WD STJ 272128023 2/9/2011 Th-228 7.91E-01 1.91E+00 4.27E+00 U WD STJ 272128023 2/9/2011 Zn-65 -1.56E+00 1.28E+00 3.93E+00 U WD STJ 272128023 2/9/2011 Zr-95 8.20E-01 1.06E+00 3.49E+00 U WD STJ 272128024 2/9/2011 1-131 7.76E-03 2.22E-01 7.49E-01 U WD LTW 272128025 2/9/2011 Ac-228 -2.54E+00 3.41E+00 8.62E+00 U WD LTW 272128025 2/9/2011 Ag-108m -4.34E-01 6.05E-01 1.92E+00 U WD LTW 272128025 2/9/2011 Ag-I l0m -7.82E-01 6.39E-01 1.98E+00 U WD LTW 272128025 2/9/2011 Ba- 140 5.33E-01 1.07E+00 3.58E+00 U WD LTW 272128025 2/9/2011 Be-7 -5.25E+00 6.07E+00 1.90E+01 U WD LTW 272128025 2/9/2011 BETA 1.89E+00 1.08E+00 2.911E+00 U WD LTW 272128025 2/9/2011 Ce- 141 1.32E+00 1.45E+00 4.46E+00 U WD LTW 272128025 2/9/2011 -1.21E+01 Ce- 144 5.8 1E+00 1.57E+01 U D-120

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 272128025 2/9/2011 Co-57 -2.76E-01 6.41E-01 2.06E+00 WD LTW 272128025 2/9/2011 Co-58 -5.77E-01 6.48E-01 2.04E+00 WD LTW 272128025 2/9/2011 Co-60 -7.24E-01 6.43E-01 1.97E+00 WD LTW 272128025 2/9/2011 Cr-51 8.54E+00 6.92E+00 2.25E+01 WD LTW 272128025 2/9/2011 Cs-134 -2.29E-01 8.OOE-01 2.63E+00 WD LTW 272128025 2/9/2011 Cs-137 1.65E+00 7.63E-01 2.35E+00 WD LTW 272128025 2/9/2011 Fe-59 4.68E-01 1.21E+00 3.99E+00 WD LTW 272128025 2/9/2011 1-131 2.54E+00 1.48E+00 4.65E+00 WD LTW 272128025 2/9/2011 K-40 -2.80E+01 1.26E+01 2.76E+01 WD LTW 272128025 2/9/2011 La-140 5.33E-01 1.07E+00 3.58E+00 WD LTW 272128025 2/9/2011 Mn-54 -2.67E-01 5.92E-01 1.92E+00 WD LTW 272128025 2/9/2011 Nb-95 3.04E-01 6.13E-01 2.06E+00 WD LTW 272128025 2/9/2011 Ru-103 -2.49E-01 7.29E-01 2.34E+00 WD LTW 272128025 2/9/2011 Ru-106 -3.21 E+00 5.85E+00 1.93E+01 WD LTW 272128025 2/9/2011 Sb-124 7.32E-01 1.36E+00 4.56E+00 WD LTW 272128025 2/9/2011 Sb-125 2.67E-02 1.83E+00 6.OOE+00 WD LTW 272128025 2/9/2011 Se-75 2.60E+00 1.14E+00 3.34E+00 WD LTW 272128025 2/9/2011 Th-228 4.37E+00 2.78E+00" 5.16E+00 WD LTW 272128025 2/9/2011 Zn-65 -3.23E+00 1.53E+00 3.91E+00 WD 272128025 2/9/2011 -5.25E-01 LTW Zr-95 1.18E+00 3.86E+00 WD LTW 272128026 2/9/2011 1-131 -7.98E-02 2.99E-01 9.75E-01 WD STJ 278375001 3/23/2011 H-3 7.93E+01 1.53E+02 4.89E+02 WD LTW 278375002 3/23/2011 H-3 7.95E+01 1.53E+02 4.91 E+02 WD STJ 272944023 2/23/2011 Ac-228 -1.30E+00 3.69E+00 9.47E+00 WD STJ 272944023 2/23/2011 Ag-108m -2.10E-01 6.OOE-01 1.90E+00 WD STJ 272944023 2/23/2011 Ag-1 10m 2.59E-01 6.07E-01 2.02E+00 WD STJ 272944023 2/23/2011 Ba- 140 -7.61E-01 1.04E+00 3.28E+00 WD STJ 272944023 2/23/2011 Be-7 -4.66E+00 5.44E+00 1.75E+01 WD STJ 272944023 2/23/2011 BETA 9.53E-01 9.90E-01 2.95E+00 WD STJ 272944023 2/23/2011 Ce- 141 2.49E+00 1.35E+00 4.02E+00 WD, STJ 272944023 2/23/2011 Ce-I144 2.07E+00 4.71E+00 1.50E+01 WD STJ 272944023 2/23/2011 Co-57 2.88E-01 6.23E-01 2.OOE+00 WD STJ 272944023 2/23/2011 Co-58 4.16E-01 6.67E-01. 2.19E+00 WD STJ 272944023 2/23/2011 Co-60 -4.70E-01 6.75E-01 2.09E+00 WD STJ 272944023 2/23/2011 Cr-51 -7.12E+00 6.61E+00 2.04E+01 WD STJ 272944023 2/23/2011 Cs-134 4.11 E-01 7.78E-01 2.55E+00 WD STJ 272944023 2/23/2011 Cs-137 1.21E+00 7.03E-01 2.25E+00 WD STJ 272944023 2/23/2011 Fe-59 5.43E-02 1.31E+00 4.32E+00 WD STJ 272944023 2/23/2011 1-131 -9.30E-0 1 1.19E+00 3.70E+00 WD STJ 272944023 2/23/2011 K-40 -4.01E+00 1.29E+01 2.89E+01 WD STJ 272944023 2/23/2011 La-140 -7.61E-01 1.04E+00 3.28E+00 WD STJ 272944023 2/23/2011 Mn-54 8.5 1E-01 6.72E-01 2.17E+00 WD STJ 272944023 2/23/2011 Nb-95 9.66E-01 7.02E-01 2.27E+00 WD STJ 272944023 2/23/2011 Ru- 103 -2.38E+00 9.03E-01 2.14E+00 WD STJ 272944023 2/23/2011 Ru-106 -5.67E+00 5.93E+00 1.85E+01 WD STJ 272944023 2/23/2011 Sb-124 -2.94E+00 1.75E+00 4.77E+00 WD STJ 272944023 2/23/2011 Sb-125 1.68E+00 1.85E+00 5.94E+00 WD STJ 272944023 2/23/2011 Se-75 1.34E+00 9.36E-01 3.OOE+00 WD STJ 272944023 2/23/2011 Th-228 -4.79E+00 2.83E+00 6.29E+00 WD STJ 272944023 2/23/2011 Zn-65 1.17E+00 1.34E+00 4.48E+00 WD STJ 272944023 2/23/2011 Zr-95 2.59E+00 1.38E+00 4.3 1E+00 D-121

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 272944024 2/23/2011 1-131 2.86E-02 1.28E-01 4.33E-01 U WD LTW 272944025 2/23/2011 Ac-228 8.57E+00 3.10E+00 8.52E+00 UI WD LTW 272944025 2/23/2011 Ag-108m -1.42E+00 6.61E-01 1.71E+00 U WD LTW 272944025 2/23/2011 Ag-110m -3.23E-01 5.60E-01 1.80E+00 U WD LTW 272944025 2/23/2011 Ba-140 1.68E-01 1.03E+00 3.35E+00 U WD LTW 272944025 2/23/2011 Be-7 -5.44E+00 5.42E+00 1.73E+01 U WD LTW 272944025 2/23/2011 BETA 1.35E+00 1.04E+00 2.95E+00 U WD "LTW 272944025 2/23/2011 Ce- 141 -2.39E-01 1.20E+00 3.92E+00 U WD LTW 272944025 2/23/2011 Ce- 144 -4.15E+00 4.74E+00 1.45E+01 U WD LTW 272944025 2/23/2011 Co-57 6.07E-01 6.18E-01 1.95E+00 U WD LTW 272944025 2/23/2011 Co-58 1.19E+00 6.43E-01 2.02E+00 U WD LTW 272944025 2/23/2011 Co-60 5.94E-01 6.53E-01 2.18E+00 U WD LTW 272944025 2/23/2011 Cr-51 -4.03E+00 6.36E+00 2.03E+01 U WD LTW 272944025 2/23/2011 Cs-134 7.25E-01 7.43E-01 2.44E+00 U WD LTW 272944025 2/23/2011 Cs-137 5.78E-01 6.45E-01 2.14E+00 U WD LTW 272944025 2/23/2011 Fe-59 2.05E+00 1.32E+00 4.33E+00 U WD LTW 272944025 2/23/2011 1-131 -1.27E+00 1.18E+00 3.61E+00 U WD LTW 272944025 2/23/2011 K-40 -1.44E+01 1.23E+01 2.91E+01 U WD LTW 272944025 2/23/2011 La-140 1.68E-01 1.03E+00 3.35E+00 U WD LTW 272944025 2/23/2011 Mn-54 -1.88E-03 5.83E-01 1.89E+00 U WD LTW 272944025 2/23/2011 Nb-95 .1.32E-01 6.38E-01 2.1OE+00 U WD LTW 272944025 2/23/2011 Ru-103 7.99E-03 6.46E-01 2.17E+00 U WD LTW 272944025 2/23/2011 Ru-106 7.36E+00 5.51E+00 1.81E+01 U WD LTW 272944025 2/23/2011 Sb-124 -2.82E+00 1.62E+00 4.46E+00 U WD LTW 272944025 2/23/2011 Sb-125 -2.30E+00 1.88E+00 5.60E+00 U WD LTW 272944025 2/23/2011 Se-75 -1.33E+00 9.OOE-01 2.71E+00 U WD LTW 272944025 2/23/2011 Th-228 1.96E-01 1.75E+00 4.23E+00 U WD LTW 272944025 2/23/2011 Zn-65 -1.89E+00 1.29E+00 3.79E+00 U WD LTW 272944025 2/23/2011 Zr-95 -7.55E-01 1.05E+00 3.31E+00 U WD LTW 272944026 2/23/2011 1-131 -7.67E-02 1.36E-01 4.32E-01 U WD STJ 273839023 3/9/2011 Ac-228 -8.29E+00 3.60E+00 6.82E+00 U WD STJ 273839023 3/9/2011 Ag-108m 2.22E-01 4.59E-01 1.48E+00 U WD STJ 273839023 3/9/2011 Ag-110m -1.84E-01 5.07E-01 1.66E+00 U WD STJ 273839023 3/9/2011 Ba-140 -8.95E-01 8.44E-01 2.53E+00 U WD STJ 273839023 3/9/2011 Be-7 -6.46E+00 4.57E+00 1.41E+01 U WD STJ 273839023 3/9/2011 BETA 1.66E+00 1.07E+00 3.OOE+00 U WD STJ 273839023 3/9/2011 Ce- 141 -2.03E+00 9.65E-01 2.76E+00 U WD STJ 273839023 3/9/2011 Ce- 144 -2.76E+00 3.79E+00 1.I1E+01 U WD STJ 273839023 3/9/2011 Co-57 -1.87E-01 4.64E-01 1.46E+00 U, WD STJ 273839023 3/9/2011 Co-58 -6.90E-01 5.22E-01 1.55E+00 U WD STJ 273839023 3/9/2011 Co-60 7.85E-02 5.24E-01 1.74E+00 U WD STJ 273839023 3/9/2011 Cr-51 -3.24E+00 4.71E+00 1.50E+01 U WD STJ 273839023 3/9/2011 Cs-134 6.91E-03 5.90E-01 1.93E+00 U WD STJ 273839023 3/9/2011 Cs-137 2.02E-01 5.52E-01 1.84E+00 U WD STJ 273839023 3/9/2011 Fe-59 8.87E-01 1.01E+00 3.39E+00 U WD STJ 273839023 3/9/2011 1-131 -2.38E-01 8.OOE-01 2.57E+00 U WD STJ 273839023 3/9/2011 K-40 3.44E+00 1.31E+01 1.64E+01 U WD STJ 273839023 3/9/2011 La-140 -8.95E-01 8.43E-01 2.53E+00 U WD STJ 273839023 3/9/2011 Mn-54 -5.70E-01 5.20E-01 1.58E+00 U WD STJ 273839023 3/9/2011 Nb-95 1.32E+00 6.13E-01 1.85E+00 U WD STJ 273839023 3/9/2011 Ru-103 5.36E-01 6.04E-01 1.78E+00 U D-122

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 273839023 3/9/2011 Ru-106 -1.51E+00 4.63E+00 1.52E+01 WD STJ 273839023 3/9/2011 Sb-124 -7.09E-01 1.16E+00 3.61E+00 WD STJ 273839023 3/9/2011 Sb-125 7.47E-02 1.41E+00 4.54E+00 WD STJ 273839023 3/9/2011 Se-75 -7.90E-01 7.31E-01 2.29E+00 WD STJ 273839023 3/9/2011 Th-228 4.33E-01 2.02E+00 4.OOE+00 WD STJ 273839023 3/9/2011 Zn-65 -3.41 E+00 1.36E+00 3.29E+00 WD STJ 273839023 3/9/2011 Zr-95 -5.28E-01 8.66E-01 2.76E+00 WD STJ 273839024 3/9/2011 1-131 2.15E-03 1.86E-01 6.28E-01 WD LTW 273839025 3/9/2011 Ac-228 9.1OE+00 3.83E+00 8.59E+00 WD LTW 273839025 3/9/2011 Ag-108m -4.58E-01 5.31E-01 1.68E+00 WD LTW 273839025 3/9/2011 Ag-110m -7.71E-01 5.67E-01 1.67E+00 WD LTW 273839025 3/9/2011 Ba-140 4.69E-01 9.38E-01 3.10E+00 WD LTW 273839025 3/9/2011 Be-7 5.95E+00 4.90E+00 1.59E+01 WD LTW 273839025 3/9/2011 BETA 1.29E+00 1.01E+00 2.88E+00 WD LTW 273839025 3/9/2011 Ce-I141 1.01E+00 1.14E+00 3.37E+00 WD LTW 273839025 3/9/2011 Ce-I144 3.40E+00 4. 1OE+00 1.27E+01 WD LTW 273839025 3/9/2011 Co-57 -9.43E-01 5.57E-01 1.61E+00 WD LTW 273839025 3/9/2011 Co-58 3.57E-01 5.92E-01 2.01E+00 WD LTW 273839025 3/9/2011 Co-60 -6.55E-01 6.25E-01 1.90E+00 WD LTW 273839025 3/9/2011 Cr-51 -1.32E+00 5.20E+00 1.72E+01 WD LTW 273839025 3/9/2011 Cs-134 3.64E-03 6.41E-01 2.16E+00 WD LTW 273839025 3/9/2011 Cs-137 -4.40E-01 6.02E-01 1.88E+00 WD LTW 273839025 3/9/2011 Fe-59 3.77E-01 1.07E+00 3.57E+00 WD LTW 273839025 3/9/2011 1-131 1.05E+00 9.5 1E-01 3.12E+00 WD LTW 273839025 3/9/2011 K-40 1.78E+01 7.71E+00 2.34E+01 WD LTW 273839025 3/9/2011 La-140 4.69E-01 9.38E-01 3.1OE+00 WD LTW 273839025 3/9/2011 Mn-54 3.63E-01 5.45E-01 1.84E+00 WD LTW 273839025 3/9/2011 Nb-95 -1.97E-01 5.77E-01 1.83E+00 WD LTW 273839025 3/9/2011 Ru-103 4.68E-01 6.10E-01 2.01E+00 WD LTW 273839025 3/9/2011 Ru-I106 -1.33E+00 5.15E+00 1.66E+01 WD LTW 273839025 3/9/2011 Sb-124 1.75E+00 1.39E+00 4.60E+00 WD LTW 273839025 3/9/2011 Sb-125 -4.93E-01 1.53E+00 5.OOE+00 WD LTW 273839025 3/9/2011 Se-75 -8.OOE-01 7.96E-01 2.55E+00 WD LTW 273839025 3/9/2011 Th-228 1.41E+00 1.85E+00 4.13E+00 WD LTW 273839025 3/9/2011 Zn-65 -1.21E+00 1.16E+00 3.58E+00 WD LTW 273839025 3/9/2011 Zr-95 - 1.16E+00 1.06E+00 3.19E+00 WD LTW 273839026 3/9/2011 1-131 1.84E-01 1.46E-01 4.82E-01 WD STJ 274661023 3/23/2011 Ac-228 5.52E+00 3.28E+00 1.08E+01 WD STJ 274661023 3/23/2011 Ag-108m 6.79E-01 7.57E-01 2.53E+00 WD STJ 274661023 3/23/2011 Ag-110m -2.13E-01 7.68E-01 2.48E+00 WD STJ 274661023 3/23/2011 Ba- 140 6.14E-01 1.25E+00 4.16E+00 WD STJ 274661023 3/23/2011 Be-7 1.69E+00. 7.06E+00 2.36E+01 WD STJ 274661023 3/23/2011 BETA 1.57E+00 9.74E-01 2.64E+00 WD STJ 274661023 3/23/2011 Ce- 141 2.98E+00 1.78E+00 5.39E+00 WD STJ 274661023 3/23/2011 Ce-I144 4.24E+00 6.25E+00 1.99E+01 WD STJ 274661023 3/23/2011 Co-57 -2.63E-01 7.96E-01 2.61E+00 WD STJ 274661023 3/23/2011 Co-58 2.10E-01 8.57E-01 2.79E+00 WD STJ 274661023 3/23/2011 Co-60 1.18E+00 8.60E-01 2.88E+00 WD STJ 274661023 3/23/2011 Cr-51 4.3 1E+00 7.72E+00 2.62E+01 WD STJ 274661023 3/23/2011 Cs-134 8.88E-01 9.26E-01 3.04E+00 WD STJ 274661023 3/23/2011 Cs-137 -4.27E-01 8.18E-01 2.59E+00 D-123

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 274661023 3/23/2011 Fe-59 8.88E-01 1.63E+00 5.5 1E+00 U WD STJ 274661023 3/23/2011 1-131 -3.85E-01 1.44E+00 4.80E+00 U WD STJ 274661023 3/23/2011 K-40 2.40E+00 1.16E+01 3.85E+01 U WD STJ 274661023 3/23/2011 La-140 6.14E-01 1.25E+00 4.16E+00 U WD STJ 274661023 3/23/2011 Mn-54 4.89E-01 7.72E-01 2.53E+00 U WD STJ 274661023 3/23/2011 Nb-95 1.09E+00 8.22E-01 2.67E+00 U WD STJ 274661023' 3/23/2011 Ru-103 1.11E+00 9.22E-01 3.03E+00 U WD STJ 274661023 3/23/2011 Ru-I106 -4.97E+00 7.21E+00 2.27E+01 U WD STJ 274661023 3/23/2011 Sb-124 1.62E+00 1.91E+00 6.37E+00 U WD STJ 274661023 3/23/2011 Sb-125 -1.35E+00 2.23E+00 7.23E+00 U WD STJ 274661023 3/23/2011 Se-75 -2.96E-01 1.20E+00 3.84E+00 U WD STJ 274661023 3/23/2011 Th-228 -1.71E+00 2.32E+00 6.47E+00 U WD STJ 274661023 3/23/2011 Zn-65 -2.02E+00 1.77E+00 5.35E+00 U WD STJ 274661023 3/23/2011 Zr-95 5.25E-01 1.38E+00 4.54E+00 U WD STJ 274661024 3/23/2011 1-131 2.30E-01 1.55E-01 4.91E-0I U WD LTW 274661025 3/23/2011 Ac-228 2.02E+00 4.18E+00 9.20E+00 U WD LTW 274661025 3/23/2011 Ag-108m -4.42E-01 5.73E-01 1.80E+00 U WD LTW 274661025 3/23/2011 Ag-Il0m -1.15E+00 6.37E-01 1.81E+00 U WD LTW 274661025 3/23/2011 Ba- 140 1.92E-02 1.04E+00 3.45E+00 U WD LTW 274661025 3/23/2011 Be-7 -7.76E+00 5.99E+00 1.78E+01 U WD LTW 274661025 3/23/2011 BETA 1.11E+00 1.05E+00 3.06E+00 U WD LTW 274661025 3/23/2011 Ce- 141 -9.76E-01 1.10E+00 3.46E+00 U WD LTW 274661025 3/23/2011 Ce-I144 -7.53E-0! 3.89E+00 1.28E+01 U WD LTW 274661025 3/23/2011 Co-57 -8.07E-01 5.42E-01 1.64E+00 U WD LTW 274661025 3/23/2011 Co-58 -5.04E-01 6.64E-01 2.08E+00 U WD LTW 274661025 3/23/2011 Co-60 4.45E-01 7.OOE-01 2.32E+00 U WD LTW 274661025 3/23/2011 Cr-51 1.85E+00 5.89E+00 1.97E+01 U WD LTW 274661025 3/23/2011 Cs-134 6.05E-01 8.29E-01 2.73E+00 U WD LTW 274661025 3/23/2011 Cs-137 6.97E-01 6.62E-01 2.20E+00 U WD LTW 274661025 3/23/2011 Fe-59 2.68E+00 1.44E+00 4.59E+00 U WD LTW 274661025 3/23/2011 1-131 -1.53E+00 1.12E+00 3.39E+00 U WD LTW 274661025 3/23/2011 K-40 9.86E+00 1.58E+01 1.87E+01 U WD LTW 274661025 3/23/2011 La-140 1.92E-02 1.04E+00 3.45E+00 U WD LTW 274661025 3/23/2011 Mn-54 5.81E-01 6.33E-01 2.07E+00 U WD LTW 274661025 3/23/2011 Nb-95 9.92E-01 6.96E-01 2.25E+00 U WD LTW 274661025 3/23/2011 Ru-103 -2.83E-01 6.56E-01 2.07E+00 U WD LTW 274661025 3/23/2011 Ru-106 9.74E+00 6.21 E+00 2.01E+01 U WD LTW 274661025 3/23/2011 Sb-124 5.05E-01 1.39E+00 4.69E+00 U WD LTW 274661025 3/23/2011 Sb-125 -1.67E+00 1.71E+00 5.30E+00 U WD LTW 274661025 3/23/2011 Se-75 -8.31E-01 8.23E-01 2.66E+00 U WD LTW 274661025 3/23/2011 Th-228 9.20E-01 1.62E+00 4.07E+00 U WD LTW 274661025 3/23/2011 Zn-65 -1.45E+00 1.51E+00 4.73E+00 U WD LTW 274661025 3/23/2011 Zr-95 -2.49E+00 1.21E+00 3.21E+00 U WD LTW 274661026 3/23/2011 1-131 4.08E-02 2.69E-01 8.81E-01 U WD STJ 275654023 4/6/2011 Ac-228 -3.88E+00 3.15E+00 7.58E+00 U WD STJ 275654023 4/6/2011 Ag-108m 2.59E-01 4.93E-01 1.62E+00 U WD STJ 275654023 4/6/2011 Ag-Il0m 2.10E-01 4.90E-01 1.66E+00 U WD 275654023 .-8.54E-01 STJ 4/6/2011 Ba- 140 1.21E+00 3.79E+00 U WD STJ 275654023 4/6/2011 Be-7 -2.71 E+00 5.42E+00 1.72E+01 U WD STJ 275654023 4/6/2011 BETA 3.16E+00 1.08E+00 2.66E+00 M WD 275654023 4/6/2011 -2.85E+00 1.32E+00 STJ Ce- 141 3.49E+00 U D-124

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 275654023 4/6/2011 Ce-144 -4.36E+00 3.98E+00 1.21E+01 U WD STJ 275654023 4/6/2011 Co-57 4.23E-01 4.93E-01 1.58E+00 U WD STJ 275654023 4/6/2011 Co-58 1.13E-01 5.25E-01 1.75E+00 U WD STJ 275654023 4/6/2011 Co-60 -1.62E-01 5.77E-01 1.91E+00 U WD STJ 275654023 4/6/2011 Cr-51 -3.OOE+00 5.76E+00 1.88E+01 U WD STJ 275654023 4/6/2011 Cs-134 4.86E-01 6.83E-01 2.29E+00 U WD STJ 275654023 4/6/2011 Cs-137 -3.80E-02 5.65E-01 1.90E+00 U WD STJ 275654023 4/6/2011 Fe-59 1.62E+00 1.20E+00 3.91E+00 U WD STJ 275654023 4/6/2011 1-131 1.20E+00 1.64E+00 5.40E+00 U WD STJ 275654023 4/6/2011 K-40 1.54E+01 1.18E+01 1.99E+01 U WD STJ 275654023 4/6/2011 La-140 -8.54E-01 1.20E+00 3.79E+00 U WD STJ 275654023 4/6/2011 Mn-54 -5.09E-02 5.34E-01 1.76E+00 U WD STJ 275654023 4/6/2011 Nb-95 1.02E+00 6.02E-01 1.95E+00 U WD STJ 275654023 4/6/2011 Ru-103 6.12E-02 6.63E-01 2.15E+00 U WD STJ 275654023 4/6/2011 Ru-106 -3.39E+00 4.69E+00 1.53E--01 U WD STJ 275654023 4/6/2011 Sb-124 4.16E-02 1.31E+00 4.32E+00 U WD STJ 275654023 4/6/2011 Sb-125 8.53E-01 1.49E+00 4.89E+00 -U WD STJ 275654023 4/6/2011 Se-75 -3.99E-01 7.49E-01 2.46E+00 U WD STJ 275654023 4/6/2011 Th-228 -8.07E-01 1.46E+00 3.63E+00 U WD STJ 275654023 4/6/2011 Zn-65 -1.77E+00 1.29E+00 3.08E+00 U WD STJ 275654023 4/6/2011 Zr-95 1.77E+00 1.07E+00 3.48E+00 U WD STJ 275654024 4/6/2011 1-131 7.63E-01 3.28E-01 9.61E-01 U WD LTW 275654025 4/6/2011 Ac-228 7.89E+00 3.82E+00 9.17E+00 U WD LTW 275654025 4/6/2011 Ag-108m 4.09E-01 5.58E-01 1.86E+00 U WD LTW 275654025 4/6/2011 Ag-110m -7.40E+00 1.92E+00 2.20E+00 U WD LTW 275654025 4/6/2011 Ba- 140 -1.88E+00 1.66E+00 4.88E+00 U WD LTW 275654025 4/6/2011 Be-7 -9.49E-01 5.59E+00 1.83E+01 U WD LTW 275654025 4/6/2011 BETA 6.26E+00 1.30E+00 2.42E+00 WD LTW 275654025 4/6/2011 Ce- 141 1.56E+00 1.15E+00 3.71E+00 U WD LTW 275654025 4/6/2011 Ce-144 -3.54E+00 3.68E+00 1.18E+01 U WD LTW 275654025 4/6/2011 Co-57 5.15E-01 4.86E-01 1.61E+00 U WD LTW 275654025 4/6/2011 Co-58 -2.43E-01 7.09E-01 2.32E+00 U WD LTW 275654025 4/6/2011 Co-60 7.81E-02 7.17E-01 2.39E+00 U WD LTW 275654025 4/6/2011 Cr-51 5.03E+00 6.28E+00 2.13E+01 U WD LTW 275654025 4/6/201-1 Cs-134 5.06E-01 7.74E-01 2.60E+00 U WD LTW 275654025 4/6/2011 Cs-137 -5.05E+00 1.88E+00 3.78E+00 U WD LTW 275654025 4/6/2011 Fe-59 -1.89E+00 1.55E+00 4.5 1E+00 U WD LTW 275654025 4/6/2011 1-131 1.62E+00 1.73E+00 5.78E+00 U WD LTW 275654025 4/6/2011 K-40 -1.30E+01 1.29E+01 3.14E+01 U WD LTW 275654025 4/6/2011 La- 140 -1.88E+00 1.66E+00 4.88E+00 U WD LTW 275654025 4/6/2011 Mn-54 4.70E-01 6.72E-01 2.25E+00 U WD LTW 275654025 4/6/2011 Nb-95 4.02E-01 7.32E-01 .2.47E+00 U WD LTW 275654025 4/6/2011 Ru-103 -1.90E+00 8.83E-01 2.30E+00 U WD LTW 275654025 4/6/2011 Ru-106 -4.90E+00 6.04E+00 1.85E+01 U WD LTW 275654025 4/6/2011 Sb-124 2.84E-02 1.83E+00 5.93E+00 U WD LTW 275654025 4/6/2011 Sb-125 1.74E+00 1.66E+00 5.50E+00 U WD LTW 275654025 4/6/2011 Se-75 -4.07E-01 8.41E-01 2.65E+00 U WD LTW 275654025 4/6/2011 Th-228 2.78E+00 2.11E+00 4.10E+00 U WD LTW 275654025 4/6/2011 Zn-65 2.18E+00 1.55E+00 5.OOE+00 U WD LTW 275654025 4/6/2011 Zr-95 -7.lIE-01 1.27E+00 4.13E+00 U WD LTW 275654026 4/6/2011 1-131 4.47E-01 2.89E-01 9.52E-01 U D-125

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 276700023 4/20/2011 Ac-228 -1.20E+00 4.86E+00 1.38E+01 U WD STJ 276700023 4/20/2011 Ag-108m -2.30E+00 9.33E-01 2.14E+00 U WD STJ 276700023 4/20/2011 Ag-Il0m -1.61E+00 9.64E-01 2.71E+00 U WD STJ 276700023 4/20/2011 Ba-140 -1.10E+00 2.05E+00 6.32E+00 U WD STJ 276700023 4/20/2011 Be-7 2.72E+00 8.59E+00 2.79E+01 U WD STJ 276700023 4/20/2011 BETA 2.04E+00 1.07E+00 3.21 E+00 U WD STJ 276700023 4/20/2011 Ce-141 -1.73E+00 1.63E+00 4.91 E+00 U WD STJ 276700023 4/20/2011 Ce-I144 -1.04E+00 5.28E+00 1.69E+01 U WD STJ 276700023 4/20/2011 Co-57 3.69E-01 7.03E-01 2.27E+00 U WD STJ 276700023 4/20/2011 Co-58 2.50E-01 9.58E-01 3.17E+00 U WD STJ 276700023 4/20/2011 Co-60 4.04E-01 1.01E+00 3.42E+00 U WD STJ 276700023 4/20/2011 Cr-51 2.91E-01 9.18E+00 3.03E+01 U WD STJ 276700023 4/20/2011 Cs-134 1.48E+00 1.06E+00 3.54E+00 U WD STJ 276700023 4/20/2011 Cs-137 5.39E-01 9.79E-01 3.30E+00 U WD STJ 276700023 4/20/2011 Fe-59 -1.81E+00 2.01E+00 6.21 E+00 U WD STJ 276700023 4/20/2011 1-131 -2.96E+00 2.49E+00 7.46E+00 U WD STJ 276700023 4/20/2011 K-40 4.5 1E+01 1.45E+01 3.13E+01 UI WD STJ 276700023 4/20/2011 La-140 -4.10E+00 2.05E+00 6.32E+00 U WD STJ 276700023 4/20/2011 Mn-54 -8.90E-02 9.25E-01 3.01E+00 U WD STJ 276700023 4/20/2011 Nb-95 1.21E+00 9.80E-01 3.28E+00 U WD STJ 276700023 4/20/2011 Ru-103 -2.47E-02 1.09E+00 3.49E+00 U WD STJ 276700023 4/20/2011 Ru-I106 -3.03E+00 7.1OE+00 2.3 1E+01 U WD STJ 276700023 4/20/2011 Sb-124 -2.75E+00 2.44E+00 6.76E+00 U WD STJ 276700023 4/20/2011 Sb-125 -1.52E+00 2.43E+00 7.57E+00 U WD STJ 276700023 4/20/2011 Se-75 1.36E+00 1.19E+00 3.92E+00 U WD STJ 276700023 4/20/2011 Th-228 -1.12E+00 2.44E+00 5.93E+00 U WD STJ 276700023 4/20/2011 Zn-65 -5.27E-01 1.90E+00 6.23E+00 U WD STJ 276700023 4/20/2011 Zr-95 1.69E+00 1.89E+00 6.33E+00 U WD STJ 276700024 4/20/2011 1-131 -1.21E-01 1.99E-01 6.41E-01 U WD LTW 276700025 4/20/2011 Ac-228 -3.04E+00 4.30E+00 1.05E+01 U WD LTW 276700025 4/20/2011 Ag-108m 2.01E-01 7.34E-01 2.38E+00 U WD LTW .276700025 4/20/2011 Ag-il0m -1.54E+00 8.04E-01 2.18E+00 U WD LTW 276700025 4/20/2011 Ba-140 7.11E-01 1.99E+00 6.77E+00 U WD LTW 276700025 4/20/2011 Be-7 -3.92E+00 7.75E+00 2.42E+01 U WD LTW 276700025 4/20/2011 BETA 2.71E+00 1.13E+00 3.29E+00 U WD LTW 276700025 4/20/2011 Ce- 141 9.72E-01 1.66E+00 5.33E+00 U WD LTW 276700025 4/20/2011 Ce-144 4.03E+00 5.61E+00 1.80E+01 U WD LTW 276700025 4/20/2011 Co-57 -2.65E-01 7.1OE-01 2.27E+00 U WD LTW 276700025 4/20/2011 Co-58 -9.61E-02 7.80E-01 2.53E+00 U WD LTW 276700025 4/20/2011 Co-60 2.37E-01 8.50E-01 2.82E+00 U WD LTW 276700025 4/20/2011 Cr-51 7.85E+00 8.99E+00 2.96E+01 U WD LTW 276700025 4/20/2011 Cs-134 8.24E-01 8.88E-01 2.95E+00 U WD LTW 276700025 4/20/2011 Cs-137 1.38E+00 8.61E-01 2.80E+00 U WD LTW 276700025 4/20/2011 Fe-59 4.90E+00 2.15E+00 6.73E+00 U WD LTW 276700025 4/20/2011 1-131 -5.57E-02 2.72E+00 8.88E+00, U WD LTW 276700025 4/20/2011 K-40 2.04E+01 1.03E+01 2.15E+01 U WD LTW 276700025 4/20/2011 La- 140 7.11 E-01 1.99E+00 6.77E+00 U WD LTW 276700025 4/20/2011 Mn-54 -7.71E-01 7.49E-01 2.25E+00 U WD LTW 276700025 4/20/2011 Nb-95 1.20E+00 8.45E-01 2.77E+00 U WD LTW 276700025 4/20/2011 Ru-103 -3.77E-01 8.72E-01 2.89E+00 U WD LTW 276700025 4/20/2011 Ru-I106 1.31E+00 6.24E+00 2.09E+01 U D-126

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 276700025 4/20/2011 Sb-124 1.78E+00 2.01E+00 6.91E+00 U WD LTW 276700025 4/20/2011 Sb-125 -3.14E-02 2.03E+00 6.54E+00 U WD LTW 276700025 4/20/2011 Se-75 6.72E-01 1.13E+00 3.77E+00 U WD LTW 276700025 4/20/2011 Th-228 -1.36E-01 2.20E+00 5.75E+00 U WD LTW 276700025 4/20/2011 Zn-65 -3.25E+00 1.87E+00 5.17E+00 U WD LTW 276700025 4/20/2011 Zr-95 1.22E+00 1.39E+00 4.64E+00 U WD LTW 276700026 4/20/2011 1-131 -6.54E-02 1.52E-01 5.07E-01 U WD STJ 277636023 5/4/2011 Ac-228 1.54E+00 3.81E+00 6.13E+00 U WD STJ 277636023 5/4/2011 Ag-108m -5.37E-01 4.01E-01 1.21E+00 U WD STJ 277636023 5/4/2011 Ag-110m -1.38E+00 5.35E-01 1.32E+00 U WD STJ 277636023 5/4/2011 Ba- 140 2.85E-01 1.53E+00 5.1OE+00 U WD STJ 277636023 5/4/2011 Be-7 -2.31 E+00 4.58E+00 1.46E+01 U WD STJ 277636023 5/4/2011 BETA 1.46E+00 1.1OE+00 3.14E+00 U WD STJ 277636023 5/4/2011 Ce- 141 -2.52E+00 1.27E+00 3.48E+00 U WD STJ 277636023 5/4/201 1 Ce- 144 -8.76E-01 2.97E+00 9.47E+00 U WD STJ 277636023 5/4/2011 Co-57 8.7 1E-02 3.94E-01 1.27E+00 U WD STJ 277636023 5/4/2011 Co-58 -1.61E-02 4.91E-01 1.63E+00 U WD STJ 277636023 5/4/2011 Co-60 -1.42E+00 9.14E-01 1.88E+00 U WD STJ 277636023 5/4/2011 Cr-51 -6.53E+00 6.13E+00 1.93E+01 U WD STJ 277636023 5/4/2011 Cs-134 2.52E-01 4.76E-01 1.59E+00 U WD STJ 277636023 5/4/2011 Cs-137 -2.92E-01 7.92E-01 1.66E+00 U WD STJ 277636023 5/4/2011 Fe-59 4.96E-01 1.08E+00 3.54E+00 U WD STJ 277636023 5/4/2011 1-131 2.56E+00 3.1OE+00 1.02E+01 U STJ 277636023 5/4/2011 K-40 -6.41E+00 8.76E+00 1.99E+01 U WD STJ 277636023 5/4/2011 La-140 2.85E-01 1.53E+00 5.10E+00 U WD STJ 277636023 5/4/2011 Mn-54 -5.09E-01 4.53E-01 1.40E+00 U WD STJ 277636023 5/4/2011 Nb-95 3.12E-02 4.90E-01 1.64E+00 U WD STJ 277636023 5/4/2011 Ru-103 -7.17E-01 6.43E-01 1.96E+00 U WD STJ 277636023 5/4/2011 Ru-106 3.36E-01 3.89E+00 1.31E+01 U WD STJ 277636023 5/4/2011 Sb- 124 -6.02E-01 1.24E+00 3.99E+00 U WD STJ 277636023 5/4/2011 Sb-125 -1.18E+00 1.21E+00 3.77E+00 U WD STJ 277636023 5/4/2011 Se-75 -6.31E-01 6.38E-01 2.05E+00 U WD STJ 277636023 5/4/2011 Th-228 -1.60E+00 1.49E+00 2.78E+00 U WD STJ 277636023 5/4/2011 Zn-65 -1.88E+00 1.09E+00 3.03E+00 U WD STJ 277636023 5/4/2011 Zr-95 5.19E-01 8.79E-01 2.95E+00 U WD STJ 277636024 5/4/2011 1-131 -1.50E-01 2.OOE-01 7.07E-01 U WD LTW 277636025 5/4/2011 Ac-228 8.41E-01 3.83E+00 7.11E+00 U WD LTW 277636025 5/4/2011 Ag-108m -6.50E-03 4.34E-01 1.44E+00 U WD LTW 277636025 5/4/2011 Ag-110m -7.54E+00 1.88E+00 1.70E+00 U WD LTW 277636025 5/4/2011 Ba- 140 2.08E+00 2.28E+00 7.54E+00 U WD LTW 277636025 5/4/2011 Be-7 -2.66E-01 5.22E+00 1.71E+01 U WD LTW 277636025 5/4/2011 BETA 3.66E+00 1.29E+00 3.57E+00 M WD WD LTW 277636025 5/4/2011 Ce-141 -1.58E+00 1.14E+00 3.54E+00 U WD LTW 277636025 5/4/2011 Ce- 144 4.05E-01 2.87E+00 9.66E+00 U WD LTW 277636025 5/4/2011 Co-57 3.58E-01 3.72E-01 1.24E+00 U WD LTW 277636025 5/4/2011 Co-58, -1.96E+00 7.47E-01 1.77E+00 U WD LTW 277636025 5/4/2011 Co-60 9.28E-01 5.88E-01 1.92E+00 U WD LTW 277636025 5/4/2011 Cr-51 7.45E+00 6.67E+00 2.22E+01 U WD LTW 277636025 5/4/2011 Cs-134 -8.44E-03 5.81E-01 1.93E+00 U WD LTW 277636025 5/4/2011 Cs-137 -2.80E+00 1.46E+00 2.89E+00 U LTW 277636025 5/4/2011 Fe-59 -I.11E+00 1.47E+00 4.53E+00 U D-127

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 277636025 5/4/2011 1-131 3.24E+00 3.50E+00 1.17E+01 U WD LTW 277636025 5/4/2011 K-40 2.20E+01 7.12E+00 1.81E+01.

WD LTW 277636025 5/4/2011 La-140 2.08E+00 2.28E+00 7.54E+00 U WD LTW 277636025 5/4/2011 Mn-54 -4.56E-01 5.27E-01 1.67E+00 U WD LTW 277636025 5/4/2011 Nb-95 3.07E-01 6.11E-01 2.05E+00 U WD LTW 277636025 5/4/2011 Ru-103 1.1OE-01 7.32E-01 2.40E+00 U WD LTW 277636025 5/4/2011 Ru-106 5.89E+00 4.98E+00 1.59E+01 U WD LTW 277636025 5/4/2011 Sb-124 2.12E+00 1.55E+00 5.06E+00 U WD LTW 277636025 5/4/2011 Sb-125 3.87E-01 1.34E+00 4.45E+00 U WD LTW 277636025 5/4/2011 Se-75 2.73E-02 6.94E-01 2.23E+00 U WD LTW 277636025 5/4/2011 Th-228 -1.09E+00 1.43E+00 3.19E+00 U WD LTW 277636025 5/4/2011 Zn-65 -2.53E+00 1.38E+00 3.75E+00 U WD LTW 277636025 5/4/2011 Zr-95 -1.01E+00 1.02E+00 3.22E+00 U WD LTW 277636026 5/4/2011 1-131 2.14E-01 2.88E-01 9.11E-01 U WD STJ 284694001 6/29/2011 H-3 5.26E+02 2.13E+02 6.08E+02 U WD LTW 284694002 6/29/2011 H-3 3.96E+02 2.06E+02 6.09E+02 U WD STJ 278595023 5/18/2011 Ac-228 -5.83E-01 3.19E+00 6.61E+00 U WD STJ 278595023 5/18/2011 Ag-108m -2.13E-02 4.28E-01 1.43E+00 U WD STJ 278595023 5/18/2011 Ag-ll0m 3.12E-01 4.65E-01 1.52E+00 U WD STJ 278595023 5/18/2011 Ba-140 2.67E+00 1.44E+00 4.54E+00 U WD STJ 278595023 5/18/2011 Be-7 5.88E+00 5.20E+00 1.70E+01 U WD STJ 278595023 5/18/2011 BETA 2.24E+00 1.20E+00 3.56E+00 U WD STJ 278595023 5/18/2011 Ce-141 1.64E+00 1.30E+00 4.OOE+00 U WD STJ 278595023 5/18/2011 Ce-144 -1.37E+00 3.71E+00 1.21E+01 U WD STJ 278595023 5/18/2011 Co-57 4.32E-01 4.96E-01 1.62E+00 U WD STJ 278595023 5/18/2011 Co-58 -1.53E-01 5.111E-01 1.63E+00 U WD. STJ 278595023 5/18/2011 Co-60 1.38E-01 4.44E-01 1.47E+00 U WD STJ 278595023 5/18/2011 Cr-51 -1.28E+01 6.71E+00 1.97E+01 U WD STJ 278595023 5/18/2011 Cs-134 4.94E-01 5.85E-01 1.89Et-00 U WD STJ 278595023 5/18/2011 Cs-137 1.31E-01 4.88E-01 1.60E+00 U WD STJ 278595023 5/18/2011 Fe-59 -3.34E-01 1.05E+00 3.45E+00 U WD STJ 278595023 5/18/2011 1-131 -8.27E-02 2.18E+00 7.30E+00 U WD STJ 278595023 5/18/2011 K-40 2.21E+01 1.26E+01 1.20E+01 UI WD STJ 278595023 5/18/2011 La-140 2.67E+00 1.44E+00 4.54E+00 U WV STJ 278595023 5/18/2011 Mn-54 -1.61E-01 4.82E-01 1.54E+00 U WD STJ 278595023 5/18/2011 Nb-95 9.75E-01 5.96E-01 1.86E+00 U WD STJ 278595023 5/18/2011 Ru-103 -8.41E-01 6.64E-01 2.05E+00 U WD STJ 278595023 5/18/2011 Ru-106 -7.81E+00 4.81E+00 1.40E+01 U WD STJ 278595023 5/18/2011 Sb-124 -5.84E-01 1.21E+00 3.80E+00 U WD STJ 278595023 5/18/2011 Sb-125 -1.37E+00 1.38E+00 4.41E+00 U WD STJ 278595023 5/18/2011 Se-75 -1.99E+00 9.01E-01 2.39E+00 U WD STJ 278595023 5/18/2011 Th-228 7.67E-01 1.94E+00 3.83E+00 U WD STJ 278595023 5/18/2011 Zn-65 -1.51E+00 1.16E+00 2.96E+00 U WD STJ 278595023 5/18/2011 Zr-95 8.97E-01 9.57E-01 3.10E+00 U WD STJ 278595024 5/18/2011 1-131 -1.26E-01 2.56E-01 8.73E-01 U WD LTW 278595025 5/18/2011 Ac-228 -2.45E+00 2.61E+00 5.86E+00 U WD LTW 278595025 5/18/2011 Ag-108m 1.35E-01 3.59E-01 1.19E+00 U WD LTW 278595025 5/18/2011 Ag-ll0m -4.48E-01 4.24E-01 1.28E+00 U WD LTW 278595025 5/18/2011 Ba-140 -2.98E+00 1.43E+00 3.74E+00 U WD LTW 278595025 5/18/2011 Be-7 2.88E+00 4.07E+00 1.34E+01 U WD LTW 278595025 5/18/2011 BETA 4.62E+00 1.31E+00 3.44E+00 D-128

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 278595025 5/18/2011 Ce-141 2.98E-01 9.45E-01 3.07E+00 WD LTW 278595025 5/18/2011 Ce-144 1.71E+00 2.89E+00 9.36E+00 WD LTW 278595025 5/18/2011 Co-57 7.14E-01 4.08E-01 1.25E+00 WD LTW 278595025 5/18/2011 Co-58 -7.87E-02 4.39E-01 1.47E+00 WD LTW 278595025 5/18/2011 Co-60 1.17E-01 9.23E-01 1.47E+00 WD LTW 278595025 5/18/2011 Cr-51 -9.32E+00 5.35E+00 1.58E+01 WD LTW 278595025 5/18/2011 Cs-134 -4.86E-01 5.16E-01 1.65E+00 WD LTW 278595025 5/18/2011 Cs-137 -6.55E-02 4.34E-01 1.39E+00 WD LTW 278595025 5/18/2011 Fe-59 1.1 IE+00 1.06E+00 3.49E+00 WD LTW 278595025 5/18/2011 1-131 -1.30E-01 1.82E+00 6.06E+00 WD LTW 278595025 5/18/2011 K-40 -8.80E+00 8.48E+00 1.91E+01 WD LTW 278595025 5/18/2011 La-140 -2.98E+00 1.42E+00 3.74E+00 WD LTW 278595025 5/18/2011 Mn-54 -7.16E-02 3.89E-01 1.30E+00 WD LTW 278595025 5/18/2011 Nb-95 9.30E-01 4.93E-01 1.57E+00 WD LTW 278595025 5/18/2011 Ru-103 -4.25E-01 5.37E-01 1.69E+00 WD LTW 278595025 5/18/2011 Ru-106 6.12E+00 3.92E+00 1.23E+01 WD LTW 278595025 5/18/2011 Sb-124 -7.41E-01 1.05E+00 3.34E+00 WD LTW 278595025 5/18/2011 Sb-125 6.26E-01 1.08E+00 3.59E+00 WD LTW 278595025 5/18/2011 Se-75 -6.27E-01 5.96E-01 1.92E+00 WD LTW 278595025 5/18/2011 Th-228 -4.19E+00 1.53E+00 2.76E+00 WD LTW 278595025 5/18/2011 Zn-65 -1.32E+00 9.47E-01 2.79E+00 WD LTW 278595025 5/18/2011 Zr-95 5.35E-02 7.88E-01 2.66E+00 WD LTW 278595026 5/18/2011 1-131 3.64E-01 2.76E-01 8.28E-01 WD STJ 279343023 6/1/2011 Ac-228 -2.49E+00 3.26E+00 7.98E+00 WD STJ 279343023 6/1/2011 Ag-108m -1.25E-01 4.60E-01 1.52E+00 WD STJ 279343023 6/1/2011 Ag-I 10m -1. 1oE+00 6.11E-01 1.65E+00 WD STJ 279343023 6/1/2011 Ba- 140 2.44E-01 1.52E+00 5.07E+00 WD STJ 279343023 6/1/2011 Be-7 6.60E+00 5.28E+00 1.74E+01 WD STJ 279343023 6/1/2011 BETA 1.40E+00 1.12E+00 3.38E+00 WD STJ 279343023 6/1/2011 Ce- 141 1.06E+00 1.14E+00 3.75E+00 WD STJ 279343023 6/1/2011 Ce- 144 -5.15E-01 3.60E+00 1.20E+01 WD STJ 279343023 6/1/2011 Co-57 1.47E-01 4.70E-01 1.58E+00 WD STJ 279343023 6/1/2011 Co-58 8.92E-01 6.46E-01 2.16E+00 WD STJ 279343023 6/1/2011 Co-60 5.04E-01 6.39E-01 2. 1OE+00 WD STJ 279343023 6/1/2011 Cr-51 5.63E+00 6.20E+00 2.10E+01 WD STJ 279343023 6/1/2011 Cs-134 3.23E-01 6.23E-01 2.12E+00 WD STJ 279343023 6/1/2011 Cs-137 7.49E-01 5.95E-01 1.93E+00 WD STJ 279343023 6/1/2011 Fe-59 -1.24E+00 1.32E+00 4.04E+00 WD STJ 279343023 6/1/2011 1-131 1.17E+00 2.03E+00 6.89E+00 WD STJ 279343023 6/1/2011 K-40 -6.54E+00 9.99E+00 2.78E+01 WD STJ 279343023 6/1/2011 La-140 2.44E-01 1.52E+00 5.07E+00 WD STJ 279343023 6/1/2011 Mn-54 -2.54E-01 4.95E-01 1.6]E+00 WD STJ 279343023 6/1/2011 Nb-95 -5.71E-01 8.60E-01 2.03E+00 WD STJ 279343023 6/1/2011 Ru-103 -2.50E+00 9.02E-01 1.97E+00 WD STJ 279343023 6/1/2011 Ru-106 -3.15E+00 5.1OE+00 1.60E+01 WD STJ 279343023 6/1/2011 Sb-124 -3.02E+00 1.71E+00 4.55E+00 WD STJ 279343023 6/1/2011 Sb-125 -4.31E-01 1.4 1E+00 4.66E+00 WD STJ 279343023 6/1/2011 Se-75 -1.75E-01 7.79E-01 2.48E+00 WD STJ 279343023 6/1/2011 Th-228 -2.34E-01 1.66E+00 4.11E+00 WD STJ 279343023 6/1/2011 Zn-65 -1.99E+00 1.23E+00 3.38E+00 WD STJ 279343023 6/1/2011 Zr-95 -5.85E-01 1.07E+00 3.52E+00 D-129

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 279343024 6/1/2011 1-131 -1.40E-01 2.36E-01 8.16E-01 WD LTW 279343025 6/1/2011 Ac-228 1.14E+00 4.57E+00 1.16E+0I WD LTW 279343025 6/1/2011 Ag-108m 1.84E-01 6.06E-01 2.02E+00 WD LTW 279343025 6/1/2011 Ag-Il0m 8.22E-01 7.32E-01 2.37E+00 WD LTW 279343025 6/1/2011 Ba- 140 -1.78E+00 2.05E+00 6.23E+00 WD LTW 279343025 6/1/2011 Be-7 2.06E+01 8.33E+00 2.43E+01 WD LTW 279343025 6/1/2011 BETA. 1.11 E+00 1.17E+00 3.62E+00 WD LTW 279343025 6/1/2011 Ce-141 -3.68E+00 1.48E+00 3.77E+00 WD LTW 279343025 6/1/2011 Ce-144 1.09E+00 3.64E+00 1.21E+01 WD LTW 279343025 6/1/2011 Co-57 1.12E+00 5.38E-01 1.63E+00 WD LTW 279343025 6/1/2011 Co-58 -9.53E-01 1.13E+00 2.65E+00 WD LTW 279343025 6/1/2011 Co-60 -1.27E+00 8.45E-01 2.42E+00 WD LTW 279343025 6/1/2011 Cr-5I -8.29E+00 7.64E+00 2.43E+01 WD LTW 279343025 6/1/2011 Cs-134 -8.08E-01 1.16E+00 2.75E+00 WD LTW 279343025 6/1/2011 Cs-137 -1.29E+00 1.31E+00 2.53E+00 WD LTW 279343025 6/1/2011 Fe-59 4.53E-01 1.99E+00 6.51E+00 WD LTW 279343025 6/1/2011 1-131 -3.66E-01 2.37E+00 7.92E+00 WD LTW 279343025 6/1/2011 K-40 -1.63E+00 1.15E+01 3.02E+01 WD LTW 279343025 6/1/2011 La-140 -1.78E+00 2.05E+00 6.23E+00 WD LTW 279343025 6/1/2011 Mn-54 3.14E-01 7.80E-01 2.62E+00 WD LTW 279343025 6/1/2011 Nb-95 7.69E-01 8.69E-01 2.94E+00 WD LTW 279343025 6/1/2011 Ru-103 -2.89E-01 8.89E-01 2.88E+00 WD LTW 279343025 6/1/2011 Ru-I106 -1.30E+01 7.40E+00 2.01E+01 WD LTW 279343025 6/1/2011 Sb-124 -2.53E-02 1.65E+00 5.40E+00 WD LTW 279343025 6/1/2011 Sb-125 5.48E-01 1.82E+00 6.09E+00 WD LTW 279343025 6/1/2011 Se-75 -5.05E-01 i .06E+00 2.91E+00 WD LTW 279343025 6/1/2011 Th-228 7.51E-01 1.86E+00 4.98E+00 WD LTW 279343025 6/1/2011 Zn-65 -8.70E-01 1.71E+00 5.39E+00 WD LTW 279343025 6/1/2011 Zr-95 6.67E-01 1.43E+00 4.85E+00 WD LTW 279343026 6/1/2011 1-131 -1.88E-01 2.26E-01 8.03E-01 WD STJ 280248023 6/15/2011 Ac-228 5.50E+00 3.90E+00 7.79E+00 WD STJ 280248023 6/15/2011 Ag-108m -5.94E-02 4.30E-01 1.41E+00 WD STJ 280248023 6/15/2011 Ag-I l0m 2.20E-01 4.68E-01 1.52E+00 WD STJ 280248023 6/15/2011 Ba-140 9.84E-01 8.66E-01 2.94E+00 WD STJ 280248023 6/15/2011 Be-7 5.33E-01 4.15E+00 1.36E+01 WD STJ 280248023 6/15/2011 BETA 1.67E+00 1.14E+00 3.23E+00 WD STJ 280248023 6/15/2011 Ce-141 -2. 12E+00 1.31E+00 2.98E+00 WD STJ 280248023 6/15/2011 Ce- 144 8.01E+00 3.84E+00 1.12E+01 WD STJ 280248023 6/15/2011 Co-57 6.08E-01 4.60E-01 1.46E+00 WD STJ 280248023 6/15/2011 Co-58 -2.89E-01 4.41E-01 1.43E+00 WD STJ 280248023 6/15/2011 Co-60 6.3 1E-01 5.05E-01 1.67E+00 WD STJ 280248023 6/15/2011 Cr-51 7.49E-01 4.68E+00 1.57E+01 WD STJ 280248023 6/15/2011 Cs-134 1. 1OE+00 6.19E-01 2.01E+00 WD STJ 280248023 6/15/2011 Cs-137 -1.02E+00 5.64E-01 1.53E+00 WD STJ 280248023 6/15/2011 Fe-59 -7.04E-01 1.04E+00 3.27E+00 WD STJ 280248023 6/15/2011 1-131 -8.70E-01 9.48E-01 3.01E+00 WD STJ 280248023 6/15/2011 K-40 2.83E+00 1.15E+01 1.65E+01 WD STJ 280248023 6/15/2011 La- 140 9.84E-01 8.65E-01 2.94E+00 WD STJ 280248023 6/15/2011 Mn-54 -1.00E+00 5.1OE-01 1.40E+00 WD STJ 280248023 6/15/2011 Nb-95 -1.I1E-01 4.66E-01 1.56E+00 WD STJ 280248023 6/15/2011 Ru-I103 -1.05E+00 5.94E-01 1.67E+00 D-130

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 280248023 6/15/2011 Ru- 106 9.90E-01 4.23E+00 1.37E+01 U WD STJ 280248023 6/15/2011 Sb-124 2.98E-01 1.17E+00 3.92E+00 U WD STJ 280248023 6/15/2011 Sb-125 -7.29E-01 1.24E+00 3.99E+00 U WD STJ 280248023 6/15/2011 Se-75 .1.07E-01 6.26E-01 2.12E+00 U WD STJ 280248023 6/15/2011 Th-228 1.23E-01 1.59E+00 3.33E+00 U WD STJ 280248023 6/15/2011 Zn-65 -6.70E-01 1.31E+00 3.19E+00 U WD STJ 280248023 6/15/2011 Zr-95 -1.35E+00 8.64E-01 2.55E+00 U WD STJ 280248024 6/15/2011 1-131 3.41E-01 3.19E-01 9.56E-01 U WD LTW 280248025 6/15/2011 Ac-228 -9.01E+00 4.94E+00 1.12E+01 U WD LTW 280248025 6/15/2011 Ag-108m 6.12E-01 6.58E-01 2.14E+00 U WD LTW 280248025 6/15/2011 Ag-I lOm 3.42E-01 7.14E-01 2.40E+00 U WD LTW 280248025 6/15/2011 Ba- 140 -1.96E+00 2.19E+00 4.92E+00 U WD LTW 280248025 6/15/2011 Be-7 -2.17E+00 6.46E+00 2.04E+01 U WD LTW 280248025 6/15/2011 BETA 1.68E+00 1.12E+00 3.17E+00 U WD LTW 280248025 6/15/2011 Ce- 141 -1 .97E+00 1.68E+00 3.97E+00 U WD LTW 280248025 6/15/2011 Ce-144 1.14E+01 5.14E+00 1.46E+01 U WD LTW 280248025 6/15/2011 Co-57 -5.86E-01 7.30E-01 1.82E+00 U WD LTW 280248025 6/15/2011 Co-58 -. 11 E-01 7.12E-01 2.3 1E+00 U WD LTW 280248025 6/15/2011 Co-60 6.97E-01 9.01E-01 3.04E+00 U WD LTW 280248025 6/15/2011 Cr-51 6.84E+00 6.96E+00 2.29E+0 I U WD LTW 280248025 6/15/2011 Cs- 134 9.06E-01 8.87E-01 2.96E+00 U WD LTW 280248025 6/15/2011 Cs-137 5.31E-01 7.62E-01 2.57E+00 U WD LTW 280248025 6/15/2011 Fe-59 3.21E+00 1.72E+00 5.66E+00 U WD LTW 280248025 6/15/2011 1-131 -1.79E+00 1.54E+00 4.67E+00 U WD LTW 280248025 6/15/2011 K-40 4.OOE+01 1.35E+01 3.78E+01 UI WD LTW 280248025 6/15/2011 La-140 -1.96E+00 2.19E+00 4.92E+00 U WD LTW 280248025 6/15/2011 Mn-54 -2.54E-01 7.05E-01 2.26E+00 U WD LTW 280248025 6/15/2011 Nb-95 -2.37E-01 7.64E-01 2.48E+00 U WD LTW 280248025 6/15/2011 Ru-103 -2.14E+00 9.86E-01 2.45E+00 U WD LTW 280248025 6/15/2011 Ru-106 -5.41 E+00 6.96E+00 2.22E+01 U WD LTW 280248025 6/15/2011 Sb-124 -1.01E+00 2.13E+00 6.63E+00 U WD LTW 280248025 6/15/2011 Sb-125 1.07E+00 2.03E+00 6.63E+00 U WD LTW 280248025 6/15/2011 Se-75 -I.13E-01 9.27E-01 3.08E+00 U WD LTW 280248025 6/15/2011 Th-228 1.81E+00 2.84E+00 5.08E+00 U WD LTW 280248025 6/15/2011 Zn-65 -4.83E+00 1.88E+00 4.12E+00 U WD LTW 280248025 6/15/2011 Zr-95 -1.58E+00 1.39E+00 4.19E+00 U WD LTW 280248026 6/15/2011 1-131 7.31E-02 2.46E-01 7.90E-01 U WD STJ 281029023 6/29/2011 Ac-228 -4.44E+00 4.76E+00 9.81E+00 U WD STJ 281029023 6/29/2011 Ag-108m 4.61E-01 6.56E-01 2.13E+00 U WD STJ 281029023 6/29/2011 Ag-1 10m -5.56E-01 6.85E-01 2.17E+00 U WD STJ 281029023 6/29/2011 Ba-140 -1.65E+00 1.75E+00 5.40E+00 U WD STJ 281029023 6/29/2011 Be-7 1.47E+01 7.38E+00 2.23E+01 U WD STJ 281029023 6/29/2011 BETA 2.33E+00 1.03E+00 3.01E+00 U WD STJ 281029023 6/29/2011 Ce- 141 3.67E+00 1.77E+00 4.94E+00 U WD STJ 281029023 6/29/2011 Ce-144 8.15E-01 4.83E+00 1.56E+01 U WD STJ 281029023 6/29/2011 Co-57 6.69E-01 6.49E-01 2.07E+00 U WD STJ 281029023 6/29/2011 Co-58 5.99E-01 7.26E-01 2.40E+00 U WD STJ 281029023 6/29/2011 Co-60 5.83E-01 7.62E-01 2.55E+00 U WD STJ 281029023 6/29/2011. Cr-5I -1.32E+00 8.34E+00 2.73E+01 U WD STJ 281029023 6/29/2011 Cs-134 1.73E+00 9.31E-01 2.94E+00 U STJ 281029023 6/29/2011 Cs-137 -2.18E-01 7.42E-01 2.43E+00 U D-131

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 281029023 6/29/2011 Fe-59 -1.66E+00 1.61E+00 4.95E+00 U WD STJ 281029023 6/29/2011 1-131 -2.63E+00 2.35E+00 7.18E+00 U WD STJ 281029023 6/29/2011 K-40 -2.71E+01 1.31E+01 3.01E+01 U WD STJ 281029023 6/29/2011 La-140 -1.65E+00 1.75E+00 5.40E+00 U WD STJ 281029023 6/29/2011 Mn-54 1.62E-01 6.77E-01 2.22E+00 U WD STJ 281029023 6/29/2011 Nb-95 -2.94E-01 7.92E-01 2.55E+00 U WD STJ 281029023 6/29/2011 Ru-103 -1.48E+00 8.94E-01 2.64E+00 U WD STJ 281029023 6/29/2011 Ru-106 7.60E-01 6.52E+00 2.17E+01 U WD STJ 281029023 6/29/2011 Sb-124 -6.43E-01 1.98E+00 6.47E+00 U WD STJ 281029023 6/29/2011 Sb-125 -3.37E-01 1.97E+00 6.33E+00 U WD STJ 281029023 6/29/2011 Se-75 3.19E-02 1.00E+00 3.35E+00 U WD STJ 281029023 6/29/2011 Th-228 1.01E+00 2.3 1E+00 5.09E+00 U WD STJ 281029023 6/29/2011 Zn-65 -2.80E+00 1.78E+00 5.13E+00 U WD STJ 281029023 6/29/2011 Zr-95 -3.58E-01 1.27E+00 4.11E+00 U WD STJ 281029024 6/29/2011 1-131 7.55E-02 2.86E-01 9.32E-01 U WD LTW 281029025 6/29/2011 Ac-228 -6.48E+00 4.12E+00 8.35E+00 U WD LTW 281029025 6/29/2011 Ag-108m -7.75E-02 5.50E-01 1.77E+00 U WD LTW 281029025 6/29/2011 Ag-110m -1.23E+00 7.26E-01 1.75E+00 U WD LTW 281029025 6/29/2011 Ba- 140 -2.27E+00 1.81E+00 5.21E+00 U WD LTW 281029025 6/29/2011 Be-7 -6.84E+00 6.12E+00 1.83E+01 U WD LTW 281029025 6/29/2011 BETA 2.76E+00 1.23E+00 3.67E+00 U WD LTW 281029025 6/29/2011 Ce-I141 -1.13E+00 1.27E+00 3.92E+00 U WD LTW 281029025 6/29/2011 Ce- 144 -3.16E+00 4.1OE+00 1.28E+01 U WD LTW 281029025 6/29/2011 Co-57 8.03E-01 5.50E-01 1.71E+00 U WD LTW 281029025 6/29/2011 Co-58 -2.83E-01 6.40E-01 2.05E+00 U WD LTW 281029025 6/29/2011 Co-60 3.95E-01 6.56E-01 2.20E+00 U WD LTW 281029025 6/29/2011 Cr-51 1.25E+01 7.33E+00 2.3 1E+01 U WD LTW 281029025 6/29/2011 Cs-134 -2.92E-01 7.84E-01 2.53E+00 U WD LTW 281029025 6/29/2011 Cs-137 5.18E-01 1.32E+00 1.89E+00 U WD LTW 281029025 6/29/2011 Fe-59 1.43E-01 1.38E+00 4.64E+00 U WD LTW 281029025 6/29/2011 1-131 3.32E+00 2.08E+00 6.59E+00 U WD LTW 281029025 6/29/2011 K-40 1.73E+01 1.42E+01 1.70E+01 UI WD LTW 281029025 6/29/2011 La-140 -2.27E+00 1.80E+00 5.21E+00 U WD LTW 281029025 6/29/2011 Mn-54 1.45E-01 6.10E-01 2.01E+00 U WD LTW 281029025 6/29/2011 Nb-95 1.18E+00 7.11E-01 2.29E+00 U WD LTW 281029025 6/29/2011 Ru-103 -8.26E&01 7.72E-01 2.3 1E+00 U WD LTW 281029025 6/29/2011 Ru-106 2.93E+00 5.36E+00 1.80E+01 U WD LTW 281029025 6/29/2011 Sb-124 -5.65E-01 1.39E+00 4.51E+00 U WD LTW 281029025 6/29/2011 Sb-125 2.33E+00 1.74E+00 5.57E+00 U WD LTW 281029025 6/29/2011 Se-75 4.48E-01 8.13E-01 2.72E+00 U WD LTW 281029025 6/29/2011 Th-228 5.68E-01 1.91E+00 4.49E+00 U WD LTW 281029025 6/29/2011 Zn-65 -1.07E+00 1.37E+00 4.35E+00 U WD LTW 281029025 6/29/2011 Zr-95 1.46E+00 1.28E+00 4.21E+00 U WD 'LTW 281029026 6/29/2011 1-131 3.95E-01 2.98E-01 9.23E-01 U WD STJ 282125023 7/13/2011 Ac-228 5.47E+00 4.28E+00 7.71E+00 U WD STJ 282125023 7/13/2011 Ag-108m 2.17E-01 4.68E-01 1.53E+00 U WD STJ 282125023 7/13/2011 Ag-110m 3.20E-01 4.89E-01 1.66E+00 U WD STJ 282125023 7/13/2011 Ba-140 -1.73E+00 1.20E+00 3.43E+00 U WD STJ 282125023 7/13/2011 Be-7 3.58E-01 4.93E+00 1.59E+01 U WD STJ 282125023 7/13/2011 BETA 1.03E+00 1.02E+00 3.04E+00 U WD STJ 7/13/2011 282125023 Ce- 141 -1.75E+00 1.57E+00 3.72E+00 U D-132

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 282125023 7/13/2011 Ce-I144 2.12E+00 3.84E+00 1.21E+01 WD STJ 282125023 7/13/2011 Co-57 2.29E-01 4.74E-01 1.61E+00 WD STJ 282125023 7/13/2011 Co-58 3.42E-01 5.71E-01 1.92E+00 WD STJ 282125023 7/13/2011 Co-60 -4.23E-01 5.89E-01 1.80E+00 WD STJ 282125023 7/13/2011 Cr-51 -2.86E+00 8.14E+00 1.88E+01 WD STJ 282125023 7/13/2011 Cs-134 8.80E-01 6.51E-01 2.16E+00 WD STJ 282125023 7/13/2011 Cs-137 -1.51E+00 7.69E-01 1.67E+00 WD STJ 282125023 7/13/2011 Fe-59 -9.57E-01 1.20E+00 3.70E+00 WD STJ 282125023 7/13/2011 1-131 2.15E+00 1.60E+00 5.14E+00 WD STJ 282125023 7/13/2011 K-40 -1.46E+01 9.32E+00 2.21E+01 WD STJ 282125023 7/13/2011 La-140 -1.73E+00 1.20E+00 3.43E+00 WD STJ 282125023 7/13/2011 Mn-54 7.06E-01 5.36E-01 1.77E+00 WD STJ 282125023 7/13/2011 Nb-95 6.67E-01 5.48E-01 1.83E+00 WD STJ 282125023 7/13/2011 Ru-103 6.34E-01 6.71E-01 2.16E+00 WD STJ 282125023 7/13/2011 Ru-106 3.09E+00 4.80E+00 1.63E+01 WD STJ 282125023 7/13/2011 Sb-124 5.51E-01 1.36E+00 4.60E+00 WD STJ 282125023 7/13/2011 Sb-125 -7.73E-01 1.45E+00 4.60E+00 WD STJ 282125023 7/13/2011 Se-75 -4.33E-01 7.40E-01 2.39E+00 WD STJ 282125023 7/13/2011 Th-228 1.61E+00 2.12E+00 3.75E+00 WD STJ 282125023 7/13/2011 Zn-65 -8.19E-02 1.11 E+00 3.59E+00 WD STJ 282125023 7/13/2011 Zr-95 -9.52E-01 9.23E-01 2.85E+00 WD STJ 282125024 7/13/2011 1-131 -1.60E-02 3.16E-01 1.04E+00 DL WD LTW 282125025 7/13/2011 Ac-228 1.41E+00 3.48E+00 8.27E+00 WD LTW 282125025 7/13/2011 Ag-108m 2.90E-01 4.96E-01 1.63E+00 WD LTW 282125025 7/13/2011 Ag-110m -1.76E+00 6.52E-01 1.51E+00 WD LTW 282125025 7/13/2011 Ba- 140 -6.92E-01 1.29E+00 4.13E+00 WD LTW 282125025 7/13/2011 Be-7 8.14E+00 5.29E+00 1.68E+01 WD LTW 282125025 7/13/2011 BETA 2.14E+00 1.20E+00 3.33E+00 WD LTW 282125025 7/13/2011 Ce-I141 -3.76E+00 1.46E+00 3.5 1E+00 WD LTW 282125025 7/13/2011 Ce-I144 3.13E+00 3.95E+00 1.26E+01 WD LTW 282125025 7/13/2011 Co-57 7.55E-01 6.50E-01 1.70E+00 WD LTW 282125025 7/13/2011 Co-58 -6.03E-01 5.70E-01 1.76E+00 WD LTW 282125025 7/13/2011 Co-60 - 1.41E+00 8.86E-01 2.28E+00 WD LTW 282125025 7/13/2011 Cr-51 4.66E+00 6.06E+00 2.01E+01 WD LTW 282125025 7/13/2011 Cs-134 -7.69E-01 6.28E-01 1.90E+00 WD LTW 282125025 7/13/2011 Cs-137 -4.5 1E-01 8.05E-01 2.OOE+00

'WD LTW 282125025 7/13/2011 Fe-59 -1.77E+00 1.25E+00 .3.56E+00 LTW 282125025 7/13/2011 1-131 -2.14E+00 1.58E+00 4.77E+00 WD LTW 282125025 7/13/2011 K-40 4.68E+00 1.43E+01 1.62E+01 WD LTW 282125025 7/13/2011 La-140 -6.92E-01 1.29E+00 4.13E+00*

WD LTW 282125025 7/13/2011 Mn-54 1.64E-01 5.34E-01 1.78E+00 WD LTW 282125025 7/13/2011 Nb-95 -1.3]E+00 6.73E-01 1.86E+00 WD LTW 282125025 7/13/2011 Ru-103 -1.47E+00 7.55E-01 2.03E+00 WD LTW 282125025 7/13/2011 Ru-106 -6.05E+00 4.81E+00 1.49E+01 WD LTW 282125025 7/13/2011 Sb-124 1.46E-01 1.39E+00 4.60E+00 WD LTW 282125025 7/13/2011 Sb-125 3.48E+00 1.66E+00 5.02E+00 WD LTW 282125025 7/13/2011 Se-75 1 30E+00 8.OOE-01 2.56E+00 WD LTW 282125025 7/13/2011 Th-228 1.66E+00 1.74E+00 3.80E+00 WD LTW 282125025 7/13/2011 Zn-65 -6.49E-01 1.23E+00 3.89E+00 WD LTW 282125025 7/13/2011 Zr-95 -2.12E+00 1.14E+00 3.16E+00 WD LTW 282125026 7/13/2011 1-131 1.80E-01 2.72E-01 8.50E-01 D-133

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 283038023 7/27/2011 Ac-228 8.95E-01 ,3.17E+00 7.95E+00 U WD STJ 283038023 7/27/2011 Ag-108m 3.07E-01 5.14E-01 1.70E+00 U WD STJ 283038023 7/27/2011 Ag-il0m -5.95E-01 5.66E-01 1.72E+00 U WD STJ 283038023 7/27/2011 Ba-140 2.27E-01 1.44E+00 4.70E+00 U WD STJ 283038023 7/27/2011 Be-7 1.36E+01 6.39E+00 1.92E+01 U WD STJ 283038023 7/27/2011 BETA -3.68E-01 8.55E-01 2.92E+00 U WD STJ 283038023 7/27/2011 Ce-141 2.06E-01 1.61E+00 4.03E+00 U WD STJ 283038023 7/27/2011 Ce-144 6.46E+00 4.33E+00 1.33E+01 U WD STJ 283038023 7/27/2011 Co-57 9.10E-01 5.72E-01 1.76E+00 U WD STJ 283038023 7/27/2011 Co-58 -2.14E-01 6.32E-01 2.1OE+00 U WD STJ 283038023 7/27/2011 Co-60 -1.50E+00 9.80E-01 2.17E+00 U WD STJ 283038023 7/27/2011 Cr-51 -6.94E+00 6.52E+00 2.06E+01 U WD STJ 283038023 7/27/2011 Cs-134 6.11E-01 6.81E-01 2.30E+00 U WD STJ 283038023 7/27/2011 Cs-137 6.44E-01 6.13E-01 1.99E+00 U WD STJ 283038023 7/27/2011 Fe-59 2.83E+00 1.42E+00 4.49E+00 U WD STJ 283038023 7/27/2011 1-131 9.97E-01 1.61E+00 5.35E+00 U WD STJ 283038023 7/27/2011 K-40 2.09E+01 8.75E+00 2.60E+01 U WD STJ 283038023 7/27/2011 La-140 2.27E-01 1.44E+00 4.70E+00 U WD STJ 283038023 7/27/2011 Mn-54 -1.79E-01 5.62E-01 1.86E+00 U WD STJ 283038023 7/27/2011 Nb-95 -6.74E-01 7.09E-01 2.16E+00 U WD STJ "283038023 7/27/2011 Ru-103 -3.90E-01 8.09E-01 2.25E+00 U WD STJ 283038023 7/27/2011 Ru-106 5.20E+00 5.66E+00 1.84E+01 U WD STJ 283038023 7/27/2011 Sb-124 -1.66E-01 1.55E+00 5.OOE+00 U WD STJ 283038023 7/27/2011 Sb-125 -1.36E+00 1.53E+00 4.82E+00 U WD STJ 283038023 7/27/2011 Se-75 -9.86E-01 8.43E-01 2.67E+00 U WD STJ 283038023 7/27/2011 Th-228 2.82E-01 1.92E+00 4.05E+00 U WD STJ 283038023 7/27/2011 Zn-65 -8.02E-01 1.19E+00 3.80E+00 U WD STJ 283038023 7/27/2011 Zr-95. -1.75E+00 1.22E+00 3.51E+00 U WD STJ 283038024 7/27/2011 1-131 2.12E-01 2.43E-01 7.86E-01 U WD LTW 283038025 7/27/2011 Ac-228 7.46E-01 4.03E+00 8.71E+00 U WD LTW 283038025 7/27/2011 Ag-108m -4.03E-01 5.68E-01 1.80E+00 U WD LTW 283038025 7/27/2011 Ag- llI0m -1.16E+00 6.46E-01 1.84E+00 U WD LTW 283038025 7/27/2011 Ba-140 2.90E+00 1.65E+00 5.33E+00 U WD LTW 283038025 7/27/2011 Be-7 4.34E+00 5.63E+00 1.83E+01 U WD LTW 283038025 7/27/2011 BETA 3.06E+00 1.31E+00 3.44E+00 U WD LTW 283038025 7/27/2011 Ce-141 1.09E-01 1:23E+00 4.01E+00 U WD LTW 283038025 7/27/2011 Ce-144 -2.16E+00 4.03E+00 1.29E+01 U WD LTW 283038025 7/27/2011 Co-57 -6.15E-01 5.57E-01 1.73E+00 U WD LTW 283038025 7/27/2011 Co-58 -4.23E-01 6.42E-01 2.04E+00 U WD LTW 283038025 7/27/2011 Co-60 4.95E-02 6.43E-01 2.13E+00 U WD LTW 283038025 7/27/2011 Cr-51 -1.20E+01 7.10E+00 2.08E+01 U WD LTW 283038025 7/27/2011 Cs-134 9.74E-01 1.07E+00 2.67E+00 U WD LTW 283038025 7/27/2011 Cs-137 -8.25E-01 8.48E-01 2.11E+00 U WD LTW 283038025 7/27/2011 Fe-59 1.14E-01 1.27E+00 4.27E+00 U WD LTW 283038025 7/27/2011 1-131 -3.65E+00 2.02E+00 5.78E+00 U WD LTW 283038025 7/27/2011 K-40 2.59E+00 1.33E+01 2.OOE+01 U WD LTW 283038025 7/27/2011 La-140 2.90E+00 1.65E+00 5.33E+00 U WD LTW 283038025 7/27/2011 Mn-54 3.84E-01 6.12E-01 2.03E+00 U WD LTW 283038025 7/27/2011 Nb-95 2.27E-01 8.74E-01 2.35E+00 U WD LTW 283038025 7/27/2011 Ru-103 -3.31E-01 7.39E-01 2.35E+00 U WD LTW 283038025 7/27/2011 Ru-106 -4.44E+00 5.47E+00 1.76E+01 U D-134

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 283038025 7/27/2011 Sb- 24 5.41E-01 1.68E+00 5.50E+00 U WD LTW 283038025 7/27/2011 Sb-125 -3.30E-02 1.67E+00 5.44E+00 U WD LTW 283038025 7/27/2011 Se-75 -9.62E-01 8.63E-01 2.75E+00 U WD LTW 283038025 7/27/2011 Th-228 -6.74E-01 1.62E+00 4.27E+00 U WD LTW 283038025 7/27/2011 Zn-65 -4.46E-02 1.36E+00 3.92E+00 U WD LTW 283038025 7/27/2011 Zr-95 8.78E-01 1.14E+00 3.80E+00 U WD LTW 283038026 7/27/2011 1-131 3.30E-01 1.96E-01 6.25E-01 U WD STJ 283976023 8/10/2011 Ac-228 1.12E+00 4.04E+00 8.70E+00 U WD STJ 283976023 8/10/2011 Ag-108m -3.77E-01 5.78E-01 1.88E+00 U WD STJ 283976023 8/10/2011 Ag-1 10m -1.8]E+00 1.66E+00 1.88E+00 U WD STJ 2839.76023 8/10/2011 Ba- 140 -1.41E+00 1.46E+00 4.40E+00 U WD STJ 283976023 8/10/2011 Be-7 -1.65E+01 7.09E+00 1.84E+01 U WD STJ 283976023 8/10/2011 BETA 1.64E+00 1.16E+00 3.40E+00 U WD STJ 283976023 8/10/2011 Ce- 141 1.36E+00 1.54E+00 4.85E+00 U WD STJ 283976023 8/10/2011 Ce-144 1.1OE+00 4.93E+00 1.63E+01 U WD STJ 283976023 8/10/2011 Co-57 -1.51E-01 6.37E-01 2.1OE+00 U WD STJ 283976023 8/10/2011 Co-58 -3.84E-01 8.57E-01 2.17E+00 U WD STJ 283976023 8/10/2011 Co-60 1.26E+00 1.20E+00 2.45E+00 U WD STJ 283976023 8/10/2011 Cr-51 -4.16E+00 7.29E+00 2.41E+01 U WD STJ 283976023 8/10/2011 Cs-134 1.38E+00 8.15E-01 2.56E+00 U WD STJ 283976023 8/10/2011 Cs-137 -1.10E+00 6.99E-01 2.02E+00 U WD STJ 283976023 8/10/2011 Fe-59 4.72E-01 1.37E+00 4.57E+00 U WD STJ 283976023 8/10/2011 1-131 1.76E+00 1.97E+00 6.57E+00 U WD STJ 283976023 8/10/2011 K-40 2.16E+01 1.39E+01 1.51E+01 UI WD STJ 283976023 8/10/2011 La-140 - 1.4 1E+00 1.46E+00 4.40E+00 U WD STJ 283976023 8/10/2011 Mn-54 3.48E-01 5.98E-01 1.95E+00 U WD STJ 283976023 8/10/2011 Nb-95 1.35E+00 7.29E-01 2.26E+00 U WD STJ 283976023 8/10/2011 Ru-I103 4.32E-01 7.95E-01 2.64E+00 U WD STJ 283976023 8/10/2011 Ru-I106 -6.03E+00 5.65E+00 1.74E+01 U WD STJ 283976023 8/10/2011 Sb-124 -3.89E+00 2.62E+00 4.86E+00 U WD STJ 283976023 8/10/2011 Sb-125 -1.14E-01 1.77E+00 5.89E+00 U WD STJ 283976023 8/10/2011 Se-75 -3.53E-01 9.99E-01 3.18E+00 U WD STJ 283976023 8/10/2011 Th-228 6.65E+00 2.50E+00 5.01E+00 UI WD STJ 283976023 8/10/2011 Zn-65 -1.64E+00 1.49E+00 3.84E+00 U WD STJ 283976023 8/10/2011V Zr-95 -2. 1OE+00 1.29E+00 3.64E+00 U WD STJ 283976024 8/10/2011 1-131 -1.80E-01 2.22E-01 7.93E-01 U WD LTW 283976025 8/10/2011 Ac-228 1.08E+00 4.99E+00 1.30E+01 U WD LTW 283976025 8/10/2011 Ag-108m 9.94E-02 7.37E-01 2.39E+00 U WD LTW 283976025 8/10/2011 Ag-110m 8.94E-01 8.1IE-01 2.72E+00 U WD LTW 283976025 8/10/2011 Ba- 140 4.69E-01 1.76E+00 5.84E+00 U WD LTW 283976025 8/10/2011 Be-7 -9.93E+00 8.09E+00 2.36E+01 U WD LTW 283976025 8/10/2011 BETA 2.52E+00 1.28E+00 3.60E+00 U WD LTW 283976025 8/10/2011 Ce- 141 -6.94E-01 1.87E+00 4.85E+00 U WD LTW 283976025 8/10/2011 Ce- 144 2.42E+00 4.88E+00 1.57E+01 U WD LTW 283976025 8/10/2011 Co-57 -5.20E-01 8.05E-01 2.04E+00 U WD LTW 283976025 8/10/2011 Co-58 -6.08E-01 8.65E-01 2.69E+00 U WD LTW 283976025 8/10/2011 Co-60 -9.26E-01 1.03E+00 3.15E+00 U WD LTW 283976025 8/10/2011 Cr-51 2.45E+00 8.65E+00 2.87E+01 U WD LTW 283976025 8/10/2011 Cs-134 1.31E+00 1.08E+00 3.60E+00 U WD LTW 283976025 8/10/2011 Cs-137 -1.01E+00 8.50E-01 2.57E+00 U WD 8/10/2011 LTW 283976025 Fe-59 1.40E+00 1.87E+00 6.40E+00 U D-135

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 283976025 8/10/2011 1-131 -1.08E+00 2.33E+00 7.46E+00 WD LTW 283976025 8/10/2011 K-40 -1.07E+01 1.41E+01 4.02E+01 WD LTW 283976025 8/10/2011 La- 140 4.69E-01 1.76E+00 5.84E+00 WD LTW 283976025 8/10/2011 Mn-54 3.68E-01 8.35E-01 2.77E+00 WD LTW 283976025 8/10/2011 Nb-95 -7.95E-01 9.30E-01 2.88E+00 WD LTW 283976025 8/10/2011 Ru-103 -1.42E-01 9.69E-01 3.08E+00 WD LTW 283976025 8/10/2011 Ru-106 -6.75E+00 7.72E+00 2.44E+01 WD LTW 283976025 8/10/2011 Sb-124 -5.67E+00 3.02E+00 6.90E+00 WD LTW 283976025 8/10/2011 Sb-125 7.19E-01 2.12E+00 6.92E+00 WD LTW 283976025 8/10/2011 Se-75 3.06E-01 1.04E+00 3.47E+00 WD LTW 283976025 8/10/2011 Th-228 5.09E+00 2.60E+00 5.48E+00 WD LTW 283976025 8/10/2011 Zn-65 -1.81E+00 1.78E+00 5.46E+00 WD LTW 283976025 8/10/2011 Zr-95 3.80E-01 1.57E+00 5.21E+00 WD LTW 283976026 8/10/2011 1-131 -3.55E-01 2.21E-01 8.32E-01 WD STJ 290330001 9/21/2011 H-3 -1.82E+02 1.75E+02 6.07E+02 WD LTW 290330002 9/21/2011 H-3 2.67E+02 2.02E+02 6.14E+02 WD STJ 284846023 8/24/2011 Ac-228 -3.37E+00 4.38E+00 8.24E+00 WD STJ 284846023 8/24/2011 Ag-108m -7.85E-01 5.64E-01 1.68E+00 WD STJ 284846023 8/24/2011 Ag-110m -9.05E-01 6.OOE-01 1.79E+00 WD STJ 284846023 8/24/2011 Ba- 140 -5.68E+00 2.34E+00 4.64E+00 WD STJ 284846023 8/24/2011 Be-7 -5.85E+00 5.81E+00 1.78E+01 WD STJ 284846023 8/24/201.1 BETA 1.18E+00 9.58E-01 2.73E+00 WD STJ 284846023 8/24/2011 Ce- 141 -5.98E-01 2.06E+00 4.47E+00 WD STJ 284846023 8/24/2011 Ce-I144 -1.06E+01 5.27E+00 1.45E+01 WD STJ 284846023 8/24/2011 Co-57 -2.02E-01 5.95E-01 1.93E+00 WD STJ 284846023 8/24/2011 Co-58 6.53E-01 6.41E-01 2.14E+00 WD STJ 284846023 8/24/2011 Co-60 -3.49E-01 7.42E-01 2.05E+00 WD STJ 284846023 8/24/2011 Cr-51 -8.56E+00 7.02E+00 2.19E+01 WD STJ 284846023 8/24/2011 Cs-134 3.82E-01 6.90E-01 2.32E+00 WD STJ 284846023 8/24/2011 Cs-137 -3.96E-01 1.06E+00 2.11E+00 WD STJ 284846023 8/24/2011 Fe-59 3.44E-01 1.44E+00 4.71E+00 WD STJ 284846023 8/24/2011 1-131 -4.81E+00 2.59E+00 6.06E+00 WD STJ 284846023 8/24/2011 K-40 2.42E+01 1.47E+01 1.45E+01 WD STJ 284846023 8/24/2011 La-140 -5.68E+00 2.33E+00 4.64E+00 WD STJ 284846023 8/24/2011 Mn-54 7.53E-01 6.35E-01 2.1OE+00 WD STJ 284846023 8/24/2011 Nb-95 7.82E-01 6.93E-01 2.3 1E+00 WD STJ 284846023 8/24/2011 Ru-103 -9.88E-01 7.77E-01 2.3 1E+00 WD STJ 284846023 8/24/2011 Ru-I106 3.27E+00 5.35E+00 1.82E+01 WD STJ 284846023 8/24/2011 Sb-124 3.34E-01 1.61E+00 5.32E+00 WD STJ 284846023 8/24/2011 Sb-125 1.84E+00 1.75E+00 5.72E+00 WD STJ 284846023 8/24/2011 Se-75 6.12E-01 9.17E-01 3.10E+00 WD STJ 284846023 8/24/2011 Th-228 -9.68E-01 1.64E+00 4.30E+00 WD STJ 284846023 8/24/2011 Zn-65 -6.01E-01 1.28E+00 4.02E+00 WD STJ 284846023 8/24/2011 Zr-95 -1.02E+00 1.1OE+00 3.46E+00 WD STJ 284846024 8/24/2011 1-131 1.15E+00 6.62E-01 2.12E+00 DL WD LTW 284846025 8/24/2011 Ac-228 -5.11E+00 3.08E+00 6.46E+00 WD LTW 284846025 8/24/2011 Ag-108m -1.65E-01 4.35E-01 1.44E+00 WD 8/24/2011 2.68E-01 LTW 284846025 Ag-110m 5.28E-01 1.74E+00 WD LTW 284846025 8/24/2011 9.28E-01 1.26E+00 Ba-140 4.28E+00 WD LTW 284846025 8/24/2011 Be-7 4.46E+00 4.74E+00 1.59E+01 WD LTW 8/24/2011 5.66E-01 9.20E-01 284846025 BETA 2.80E+00 D-136

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 284846025 8/24/2011 Ce-I141 -7.63E-01 1.09E+00 3.17E+00 U WD LTW 284846025 8/24/2011 Ce- 144 -1.37E+00 3.34E+00 1.11E+01 U WD LTW 284846025 8/24/2011 Co-57 6.50E-01 4.57E-01 1.49E+00 U WD LTW 284846025 8/24/2011 Co-58 8.55E-02 5.36E-01 1.82E+00 U WD LTW 284846025 8/24/2011 Co-60 -1.84E+00 7.02E-01 1.43E+00 U WD LTW 284846025 8/24/2011 Cr-51 5.43E+00 6.11E+00 1.95E+01 U WD LTW 284846025 8/24/2011 Cs-134 -2.45E+00 9.17E-01 1.96E+00 U WD LTW 284846025 8/24/2011 Cs-137 -5.23E-01 5.83E-01 1.79E+00 U WD LTW 284846025 8/24/2011 Fe-59 2.66E+00 1.32E+00 4.21E+00 U WD LTW 284846025 8/24/2011 1-131 -3.61 E+00 1.76E+00 4.96E+00 U WD LTW 284846025 8/24/2011 K-40 -3.05E+01 1.12E+01 1.96E+01 U WD LTW 284846025 8/24/2011 La-140 9.28E-01 1.25E+00 4.28E+00 U WD LTW 284846025 8/24/2011 Mn-54 3.12E-01 5.06E-01 1.73E+00 U WD LTW 284846025 8/24/2011 Nb-95 -7.77E-01 6.47E-01 1.90E+00 U WD LTW 284846025 8/24/2011 Ru-103 6.78E-01 6.38E-01 2.12E+00 U WD LTW 284846025 8/24/2011 Ru-106 6.62E+00 5.02E+00 1.64E+01 U,

WD LTW 284846025 8/24/2011 Sb-124 -2.23E+00 1.68E+00 4.OOE+00 WD 8/24/2011 U

LTW 284846025 Sb-125 -2.OOE+00 1.47E+00 4.51E+00 WD U LTW 284846025 8/24/2011 Se-75 8.95E-01 7.20E-01 2.30E+00 WD U LTW 284846025 8/24/2011 Th-228 -2.17E-03 1.41E+00 3.57E+00 WD LTW U

284846025 8/24/2011 Zn-65 6.30E-01 1.13E+00 3.78E+00 WD LTW 8/24/2011 Zr-95 U

284846025 9.52E-01 1.04E+00 3.39E+00 WD 8/24/2011 1-131 2.56E+00 U D LTW 284846026 1.50E+00 4.84E+00 WD U D STJ 285555023 9/7/2011 Ac-228 5.43E+00 5.19E+00 1.01E+01 WD STJ 285555023 9/7/2011 Ag-108m 3.66E-01 U

6.10E-01 1.98E+00 WD 9/7/2011 U STJ 285555023 Ag-Il0m 1.54E-01 7.08E-01 2.36E+00 u U

WD STJ 285555023 9/7/2011 Ba-140 9.68E-01 1.79E+00 6.11E+00 WD 9/7/2011 U STJ 285555023 Be-7 2.42E-01 6.88E+00 2.21E+01 WD STJ 285555023 9/7/2011 BETA 1.36E+00 1.02E+00 U

2.89E+00 WD U STJ 285555023 9/7/2011 Ce-I141 5.73E-01 2.80E+00 4.67E+00 U

WD STJ 285555023 9/7/2011 Ce- 144 -3.75E+00 5.1OE+00 1.59E+01 WD U STJ 285555023 9/7/2011 Co-57 1.75E+00 7.67E-01 2.19E+00 WD STJ 285555023 9/7/2011 Co-58 4.57E-01 7.42E-01 U

2.45E+00 WD U STJ 285555023 9/7/2011 Co-60 1.60E-01 7.37E-01 2.44E+00 WD STJ 285555023 9/7/2011 Cr-51 U

-8.30E+00 8.40E+00 2.63E+01 WD STJ 285555023 9/7/2011 Cs-134 7.32E-01 U

7.98E-01 2.64E+00 U

WD STJ 285555023 9/7/2011 Cs-137 -3.86E-01 7.85E-01 2.54E+00 WD 285555023 9/7/2011 Fe-59 2.61E+00 U.

STJ 1.76E+00 5.81E+00 WD U STJ 285555023 9/7/2011 1-131 -9.09E-01 2.22E+00 7.13E+00 WD U STJ 285555023 9/7/2011 K-40 3.76E+00 1.25E+01 3.21E+01 WD 9/7/2011 U STJ 285555023 La-140 9.68E-01 1.79E+00 6.11E+00 WD 9/7/2011 U STJ 285555023 Mn-54 2.48E-02 6.54E-01 2.13E+00 WD U STJ 285555023 9/7/2011 Nb-95 2.77E-01 8.08E-01 2.66E+00 U

WD STJ 285555023 9/7/2011 Ru- 103 -3.70E-01 8.37E-01 2.78E+00 WD U STJ 285555023 9/7/2011 Ru-106. 6.13E+00 6.40E+00 2.13E+01 WD U STJ 285555023 9/7/2011 Sb-124 -1.41E-01 1.98E+00 6.59E+00 WD U STJ 285555023 9/7/2011 Sb-125 4.20E-02 1.92E+00 6.19E+00 WD STJ 9/7/2011 Se-75 5.95E-01 1.03E+00 U

285555023 3.44E+00 WD 285555023 9/7/2011 Th-228 -4.40E+00 U

STJ 2.23E+00 5.12E+00 WD U STJ 285555023 9/7/2011 Zn-65 -2.66E+00 1.73E+00 5.OOE+00 WD STJ 285555023 9/7/2011 Zr-95 1.81E-01 1.36E+00 4.47E+00 U

D-137

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 285555024 9/7/2011 1-131 2.99E-01 3.OOE-01 9.70E-01 WD LTW 285555025 9/7/2011 Ac-228 -3.56E+00 3.26E+00 8.23E+00 WD LTW 285555025 9/7/2011 Ag-108m -2.42E-02 4.93E-01 1.65E+00 WD LTW 285555025 9/7/2011 Ag-Il0m 5.16E-01 5.98E-01 1.96E+00 WD LTW 285555025 9/7/2011 Ba-140 1.98E-01 1.48E+00 4.96E+00 WD LTW 285555025 9/7/2011 Be-7 2.02E+00 5.48E+00 1.83E+01 WD LTW 285555025 9/7/2011 BETA 7.67E-01 9.75E-01 2.96E+00 WD LTW 285555025 9/7/2011 Ce-141 -1.25E-01 1.25E+00 4.02E+00 WD LTW 285555025 9/7/2011 Ce- 144 -4.05E+00 4.08E+00 1.26E+01 WD LTW 285555025 9/7/2011 Co-57 1.75E-01 5.17E-01 1.74E+00 WD LTW 285555025 9/7/2011 Co-58 -4.24E-01 6.28E-01 1.95E+00 WD LTW 285555025 9/7/2011 Co-60 2.93E-01 6.30E-01 2.08E+00 WD LTW 285555025 9/7/2011 Cr-51 -1.43E+01 7.41E+00 2.03E+01 WD LTW 285555025 9/7/2011 Cs-134 8.31E-01 7.10E-01 2.30E+00 WD LTW 285555025 9/7/2011 Cs-137 -2.14E-01 6.29E-01 2.03E+00 WD LTW 285555025 9/7/2011 Fe-59 -3.94E-01 1.34E+00 4.39E+00 WD LTW 285555025 9/7/2011 1-131 -3.92E+00 2.01E+00 5.79E+00 WD LTW 285555025 9/7/2011 K-40 5.11E+00 1.02E+01 2.81E+01 WD LTW 285555025 9/7/2011 La- 140 1.98E-01 1.48E+00 4.96E+00 WD LTW 285555025 9/7/2011 Mn-54 6.94E-01 5.81E-01 1.94E+00 WD LTW 285555025 9/7/2011 Nb-95 1.16E+00 6.93E-01 2.18E+00 WD LTW 285555025 9/7/2011 Ru-103 8.95E-01 7.47E-01 2.44E+00 WD LTW 285555025 9/7/2011 Ru-106 -2.24E+00 5.53E+00 1.79E+01 WD LTW 285555025 9/7/2011 Sb-124 -4.32E-01 1.46E+00 4.78E+00 WD LTW 285555025 9/7/2011 Sb-125 2.34E+00 1.63E+00 5.33E+00 WD LTW 285555025 9/7/2011 Se-75 -3.32E-01 8.31E-01 2.67E+00 WD LTW 285555025 9/7/2011 Th-228 -2.92E+00 1.93E+00 4.19E+00 WD LTW 285555025 9/7/2011 Zn-65 -2.39E+00 1.40E+00 3.94E+00 WD LTW 285555025 9/7/2011 Zr-95 4.97E-01 1.18E+00 3.84E+00 WD LTW 285555026 9/7/2011 1-131 2.5 1E+00 1.19E+00 3.68E+00 DL WD STJ 286489023 9/21/2011 Ac-228 -4.02E+00 3.72E+00 8.81E+00 WD STJ 286489023 9/21/2011 Ag-108m -1.55E-01 5.79E-01 1.92E+00 WD STJ 286489023 9/21/2011 Ag-il0m -7.77E-01 6.42E-01 1.93E+00 WD STJ 286489023 9/21/2011 Ba-140 2.22E-01 1.48E+00 4.96E+00 WD STJ 286489023 9/21/2011 Be-7 -6.08E+00 6.18E+00 1.95E+01 WD STJ 286489023 9/21/2011 BETA -1.65E-01 9.19E-01 3.06E+00 WD STJ 286489023 9/21/2011 Ce- 141 1.55E+00 1.38E+00 4.50E+00 WD STJ 286489023 9/21/2011 Ce-144 4.34E+00 4.55E+00 1.46E+01 WD STJ 286489023 9/21/2011 Co-57 -5.37E-01 5.77E-01 1.87E+00 WD STJ 286489023 9/21/2011 Co-58 -5.01E-01 7.02E-01 2.17E+00 WD STJ 286489023 9/21/2011 Co-60 5.70E-02 6.97E-01 2.28E+00 WD STJ 286489023 9/21/2011 Cr-51 9.74E-01 7.21E+00 2.33E+01 WD STJ 286489023 9/21/2011 Cs-134 7.74E-01 8.12E-01 2.64E+00 WD STJ 286489023 9/21/2011 Cs-137 1.02E+00 6.87E-01 2.21E+00 WD STJ 286489023 9/21/2011 Fe-59 1.14E+00 1.43E+00 4.79E+00 WD STJ 286489023 9/21/2011 1-131 -1.12E+00 1.88E+00 6.20E+00 WD STJ 286489023 9/21/2011 K-40 2.55E+00 1.64E+01 2.08E+01 WD STJ 286489023 9/21/2011 La-140 2.22E-01 1.48E+00 4.96E+00 WD 1.08E+00 STJ 286489023 9/21/2011 Mn-54 6.51E-01 2.13E+00 WD STJ 286489023 9/21/2011 Nb-95 2.07E+00 8.72E-01 2.56E+00 WD STJ 286489023 9/21/2011 Ru-103 -2.91E-01 7.38E-01 2.42E+00 D-138

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 286489023 9/21/2011 Ru-106 7.52E+00 6.17E+00 2.01E+01 U WD STJ 286489023 9/21/2011 Sb-124 -2.57E+00 1.64E+00 4.58E+00 U WD STJ 286489023 9/21/2011 Sb-125 - 1.17E+00 1.73E+00 5.63E+00 U WD STJ 286489023 9/21/2011 Se-75 1.72E+00 1.01E+00 3.13E+00 U WD STJ 286489023 9/21/2011 Th-228 4.17E-01 2.36E+00 4.84E+00 U WD STJ 286489023 9/21/2011 Zn-65 7.47E-02 1.56E+00 4.43E+00 U WD STJ 286489023 9/21/2011 Zr-95 3.49E+00 1.50E+00 4.44E+00 U W¢D STJ 286489024 9/21/2011 1-131 1.56E-01 2.93E-01 9.39E-01 U WD LTW 286489025 9/21/2011 Ac-228 -9.18E+00 4.50E+00 9.111E+00 U WD LTW 286489025 9/21/2011 Ag-108m 9.63E-01 6.48E-01 2.10E+00 U WD LTW 286489025 9/21/2011 Ag-il0m -1.38E-04 6.65E-01 2.17E+00 U WD LTW 286489025 9/21/2011 Ba-140 1.75E+00 1.36E+00 4.54E+00 U WD LTW 286489025 9/21/2011 Be-7 5.27E+00 6.66E+00 2.21 E+01 U WD LTW 286489025 9/21/2011 BETA 3.11E+00 1.18E+00 2.89E+00 M WD LTW 286489025 9/21/2011 Ce-141 1.70E+00 1.80E+00 5.17E+00 U WD LTW 286489025 9/21/2011 Ce-144 4.44E+00 5.28E+00 1.73E+01 U WD LTW 286489025 9/21/2011 Co-57 2.56E-01 6.83E-01 2.26E+00 U WD LTW 286489025 9/21/2011 Co-58 6.17E-01 7.51E-01 2.45E+00 U WD LTW 286489025 9/21/2011 Co-60 6.86E-01 6.91E-01 2.3 11E+00 U WD LTW 286489025 9/21/2011 Cr-51 1.71 E+00 7.72E+00 2.61E+01 U WD LTW 286489025 9/21/2011 Cs-134 4.10E-01 8.25E-01 2.70E+00 U WD LTW 286489025 9/21/2011 Cs-137 -1.40E-01 7.05E-01 2.29E+00 U WD LTW 286489025 9/21/2011 Fe-59 2.04E+00 1.46E+00 4.86E+00 U WD LTW 286489025 9/21/2011 1-131 -2.94E+00 2.24E+00 6.94E+00 U WD LTW 286489025 9/21/2011 K-40 2.38E+01 1.41E+01 1.96E+01 UI WD LTW 286489025 9/21/2011 La-140 1.75E+00 1.36E+00 4.54E+00 U WD LTW 286489025 9/21/2011 Mn-54 4.07E-01 6.48E-01 2.12E+00 U WD LTW 286489025 9/21/2011 Nb-95 2.83E-01 7.37E-01 2.41E+00 U WD LTW 286489025 9/21/2011 Ru-103 -4.96E-01 8.33E-01 2.69E+00 U WD LTW 286489025 9/21/2011 Ru-106 -3.51E-01 6.3 1E+00 2.06E+01 U WD LTW 286489025 9/21/2011 Sb-124 1.30E+00 1.66E+00 5.53E+00 U WD LTW 286489025 9/21/2011 Sb-125 -4.61E-01 1.87E+00 6.20E+00 U WD LTW 286489025 9/21/2011 Se-75 -7.13E-01 1.08E+00 3.38E+00 U WD LTW 286489025 9/21/2011 Th-228 4.76E-01 2.05E+00 5.46E+00 U WD LTW 286489025 9/21/2011 Zn-65 -5.94E+00 2.13E+00 4.61E+00 U WD LTW 286489025 9/21/2011 Zr-95 4.27E-01 1.31E+00 4.28E+00 U WD LTW 286489026 9/21/2011 1-131 4.44E-01 2.90E-01 9.29E-01 U WD STJ 287655023 10/5/2011 Ac-228 -4.47E+00 3.52E+00 8.59E+00 U WD STJ 287655023 10/5/2011 Ag-108m -2.50E-01 5.57E-01 1.85E+00 U WD STJ 287655023 10/5/2011 Ag-il0m -1.15E+00 6.91E-01 1.96E+00 U WD STJ 287655023 10/5/2011 Ba- 140 -2.58E+00 1.71E+00 4.84E+00 U WD STJ 287655023 10/5/2011 Be-7 -5.28E+00 6.16E+00 1.98E+01 U WD STJ 287655023 10/5/2011 BETA 4.12E+00 1.30E+00 3.06E+00 WD STJ 287655023 10/5/2011 Ce-141 1.44E+00 1.77E+00 4.24E+00 U WD STJ 287655023 10/5/2011 Ce-i144 3.26E-01 4.76E+00 1.52E+01 U WD STJ 287655023 10/5/2011 Co-57 -4.89E-01 6.27E-01 1.96E+00 U WD STJ 287655023 10/5/2011 Co-58 -4.05E-01 6.65E-01 2.17E+00 U WD STJ 287655023 10/5/2011 Co-60 1.06E+00 7.25E-01 2.43E+00 U WD STJ 287655023 10/5/2011 Cr-51 2.26E+00 7.46E+00 2.45E+01 U WD STJ 287655023 10/5/2011 Cs-134 7.23E-01 7.51E-01 2.45E+00 U WD STJ 287655023 10/5/2011 Cs-137 3.45E-01 7.OOE-01 2.31E+00 U D-139

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 287655023 10/5/2011 Fe-59 -8.72E-01 1.46E+00 4.63E+00 WD STJ 287655023 10/5/2011 1-131 -2.40E-01 2.03E+00 6.54E+00 WD STJ 287655023 10/5/2011 K-40 6.11E+01 1.59E+01 2.01E+01 WD STJ 287655023 10/5/2011 La-140 -2.58E+00 1.70E+00 4.84E+00 WD STJ 287655023 10/5/2011 Mn-54" 5.29E-01 6.15E-01 2.08E+00 WD STJ 287655023 10/5/2011 Nb-95 6.27E-01 7.07E-01 2.31E+00 WD STJ 287655023 10/5/2011 Ru-103 3.38E-02 7.61E-01 2.55E+00 WD STJ 287655023 10/5/2011 Ru-106 8.57E+00 5.99E+00 1.94E+01 WD STJ 287655023 10/5/2011 Sb-124 -2.75E+00 1.78E+00 4.92E+00 WD STJ 287655023 10/5/2011 Sb-125 1.53E+00 1.70E+00 5.72E+00 WD STJ 287655023 10/5/2011 Se-75 -5.29E-01 9.18E-01 2.97E+00 WD STJ 287655023 10/5/2011 Th-228 5.49E-01 1.93E+00 4.34E+00 WD STJ 287655023 10/5/2011 Zn-65 -5.60E+00 2.01E+00 4.28E+00 WD STJ 287655023 10/5/2011 Zr-95 -1.03E+00 1.31E+00 3.67E+00 WD STJ 287655024 10/5/2011 1-131 1.32E-01 1.67E-01 5.13E-01 WD LTW 287655025 10/5/2011 Ac-228 1.93E+00 3.78E+00 9.07E+00 WD LTW 287655025 10/5/2011 Ag-108m 1.63E-01 5.67E-01 1.88E+00 WD LTW 287655025 10/5/2011 Ag-I 10m ,3.13E-02 6.26E-01 2.03E+00 WD LTW 287655025 10/5/2011 Ba-140 2.72E+00 1.74E+00 5.65E+00 WD LTW 287655025 10/5/2011 Be-7 -3.98E+00 6.OOE+00 1.91E+01 WD LTW 287655025 10/5/2011 BETA 4.89E+00 1.35E+00 3.02E+00 WD LTW 287655025 10/5/2011 Ce- 141 5.87E-01 1.55E+00 4.37E+00 WD LTW 287655025 10/5/2011 Ce- 144 8.18E+00 5.40E+00 1.47E+01 WD LTW 287655025 10/5/2011 Co-57 3.03E-02 5.87E-01 1.90E+00 WD LTW 287655025 10/5/2011 Co-58 -2.17E-01 6.56E-01 2.18E+00 WD LTW 287655025 10/5/2011 Co-60 7.42E-01 7.86E-01 2.61E+00 WD LTW 287655025 10/5/2011 Cr-51 -5.80E+00 7.17E+00 2.31E+01 WD LTW 287655025 10/5/2011 Cs-134 4.98E-01 7.97E-01 2.70E+00 WD LTW 287655025 10/5/2011 Cs-137 1.43E+00 7.50E-01 2.32E+00 WD LTW 287655025 10/5/2011 Fe-59 -9.41E-01 1.37E+00 4.35E+00 WD LTW 287655025 10/5/2011 1-131 -1.36E+00 1.97E+00 6.34E+00 WD LTW 287655025 10/5/2011 K-40 -8.41 E+00 1.05E+01 2.83E+01 WD LTW 287655025 10/5/2011 La-140 2.72E+00 1.73E+00 5.65E+00 WD LTW 287655025 10/5/2011 Mn-54 5.22E-01 6.50E-01 2.20E+00 WD LTW 287655025 10/5/2011 Nb-95 4.19E-01 7.39E-01 2.41E+00 WD LTW 287655025 10/5/2011 Ru-103 -5.07E-01 8.02E-01 2.56E+00 WD LTW 287655025 10/5/2011 Ru-106 -1.15E+00 5.90E+00 1.91E+01 WD LTW 287655025 10/5/2011 Sb-124 -3.07E+00 2.03E+00 5.62E+00 WD LTW 287655025 10/5/2011 Sb-125 -4.31 E-01 1.69E+00 5.54E+00 WD LTW 287655025 10/5/2011 Se-75 1.28E-02 8.96E-01 3.01E+00 WD LTW 287655025 10/5/2011 Th-228 3.08E-01 2.06E+00 4.56E+00 WD LTW 287655025 10/5/2011 Zn-65 -4.08E-01 1.40E+00 4.56E+00 WD LTW 287655025 10/5/2011 Zr-95 3.98E+00 1.57E+00 4.5 1E+00 WD LTW 287655026 10/5/2011 1-131 -3.48E-02 2.19E-01 7.26E-01 WD. STJ 288553023 10/19/2011 Ac-228 9.47E+00 5.16E+00 1.12E+01 WD STJ 288553023 10/19/2011 Ag-108m -2.87E-02 6.55E,01 2.09E+00 WD STJ 288553023 10/19/2011 Ag-110m -9.77E-01 7.49E-01 2.24E+00 WD STJ 288553023 10/19/2011 Ba-140 5.90E-01 1.25E+00 4.13E+00 WD STJ 288553023 10/19/2011 Be-7 1.48E+00 6.07E+00 2.05E+01 WD STJ 288553023 10/19/2011 BETA 1.59E+00 1.07E+00 3.01E+00 WD STJ 288553023 10/19/2011 Ce- 141 1.90E+00 1.53E+00 4.50E+00 D-140

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 288553023 10/19/2011 Ce-144 1.49E+01" 6.25E+00 1.80E+01 U WD STJ 288553023 10/19/2011 Co-57 1.04E+00 6.96E-01 2.27E+00 U WD STJ 288553023 10/19/2011 Co-58 -4.14E-01 7.41E-01 2.34E+00 U WD STJ 288553023 10/19/2011 Co-60 9.56E-01 8.23E-01 2.76E+00 U WD STJ 288553023 10/19/2011 Cr-51 -2.37E+01 1.06E+01 2.28E+01 U WD STJ 288553023 10/19/2011 Cs-134 -3.51E-02 9.10E-01 2.96E+00 U WD STJ 288553023 10/19/2011 Cs-137 9.53E-01 8.10E-01 2.68E+00 U WD STJ 288553023 10/19/2011 Fe-59 -7.43E-01 1.49E+00 4.82E+00 U WD STJ 288553023 10/19/2011 1-131 -9.46E-01 1.72E+00 4.43E+00 U WD STJ 288553023 10/19/2011 K-40 1.22E+01 1.15E+01 3.18E+01 U WD STJ 288553023 10/19/2011 La-140 5.90E-01 1.25E+00 4.13E+00 U WD STJ 288553023 10/19/2011 Mn-54 -3.15E-01 7.38E-01 2.35E+00 U WD STJ 288553023 10/19/2011 Nb-95 -3.99E-01 1.10E+00 2.54E+00 U WD STJ 288553023 10/19/2011 Ru-103 -7.89E-01 7.82E-01 2.47E+00 U WD STJ 288553023 10/19/2011 Ru-106 -6.12E+00 6.40E+00 2.OOE+01 U WD STJ 288553023 10/19/2011 Sb-124 -2.67E+00 2.01E+00 5.61E+00 U WD STJ 288553023 10/19/2011 Sb-125 -1.40E-01 1.97E+00 6.28E+00 U WD STJ 288553023 10/19/2011 Se-75 -2.14E+00 1.14E+00 3.18E+00 U WD STJ 288553023 10/19/2011 Th-228 1.60E+00 2.72E+00 5.71E+00 U WD STJ 288553023 10/19/2011 Zn-65 -3.13E+00 1.75E+00 3.86E+00 U WD STJ 288553023 10/19/2011 Zr-95 -8.31E-01 1.24E+00 3.90E+00 U WD STJ 288553024 10/19/2011 1-131 -1.50E-01 1.24E-01 4.41E-01 U WD LTW 288553025 10/19/2011 Ac-228 -5.I1E+00 3.52E+00 9.08E+00 U WD LTW 288553025 10/19/2011 Ag-108m -3.19E-01 5.70E-01 1.79E+00 U WD LTW 288553025 10/19/2011 Ag-ll0m -2.71E+00 9.14E-01 1.86E+00 U WD LTW 288553025 10/19/2011 Ba-140 -1.73E+00 1.23E+00 3.41E+00 U WD LTW 288553025 10/19/2011 Be-7 4.80E+00 6.03E+00 1.95E+01 U WD LTW 288553025 10/19/2011 BETA 2.02E+00 1.07E+00 2.88E+00 U WD LTW 288553025 10/19/2011 Ce-141 1.42E-01 1.51E+00 3.91E+00 U WD LTW 288553025 10/19/2011 Ce-144 -1.14E+00 4.39E+00 1.41E+01 U WD LTW 288553025 10/19/2011 Co-57 5.31E-01 5.62E-01 1.81E+00 U WD LTW 288553025 10/19/2011 Co-58 -8.39E-01 6.39E-01 1.86E+00 U WD LTW 288553025 10/19/2011 Co-60 -5.20E-02 6.35E-01 2.08E+00 U WD LTW 288553025 10/19/2011 Cr-51 -1.33E+01 6.58E+00 1.79E+01 U.

WD LTW 288553025 10/19/2011 Cs-134 5.96E-01 7.82E-01 2.60E+00 U WD LTW 288553025 10/19/2011 Cs-137 1.21E-01 1.11E+00 2.77E+00 U WD LTW 288553025 10/19/2011 Fe-59 -8.lIE-01 1.28E+00 4.09E+00 U WD LTW 288553025 10/19/2011 1-131 -6.32E-02 1.21E+00 3.94E+00 U WD LTW 288553025 10/19/2011 K-40 -1.54E+01 1.11E+01 2.71E+01 U WD LTW 288553025 10/19/2011 La-140 -1.73E+00 1.23E+00 3.41E+00 U WD LTW 288553025 10/19/2011 Mn-54 -7.44E-01 6.36E-01 1.89E+00 U WD LTW 288553025 10/19/2011 Nb-95 4.36E-01 6.52E-01 2.17E+00 U WD LTW 288553025 10/19/2011 Ru-103 -1.47E+00 8.38E-01 2.28E+00 U WD LTW 288553025 10/19/2011 Ru-106 -5.38E+00 5.82E+00 1.83E+01 U WD LTW 288553025 10/19/2011 Sb-124 -1.68E+00 1.63E+00 4.94E+00 U WD LTW 288553025 10/19/2011 Sb-125 9.15E-01 1.76E+00 5.74E+00 U WD LTW 288553025 10/19/2011 Se-75 -5.94E-01 8.85E-01 2.87E+00 U WD LTW 288553025 10/19/2011 Th-228 -6.31E-01 1.93E+00 4.83E+00 U WD LTW 288553025 10/19/2011 Zn-65 -6.39E-01 1.29E+00 4.18E+00 U WD LTW 288553025 10/19/2011 Zr-95 5.75E-01 1.19E+00 3.95E+00 U WD LTW 288553026 10/19/2011 1-131 -1.05E-01 1.36E-01 4.64E-01 U D-141

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 289618023 11/2/2011 Ac-228 -4.OOE+00 4.43E+00 1.IIE+01 WD STJ 289618023 11/2/2011 Ag-108m 1.47E+00 8.24E-01 2.63E+00 WD STJ 289618023 11/2/2011 Ag-I l0m 4.98E-01 7.85E-01 2.59E+00 WD STJ 289618023 11/2/2011 Ba- 140 5.07E-01 1.13E+00 3.74E+00 WD STJ 289618023 11/2/2011 Be-7 8.25E+00 7.08E+00 2.34E+01 WD STJ 289618023 11/2/2011 BETA 3.13E+00 1.24E+00 3.17E+00 WD STJ 289618023 11/2/2011 Ce- 141 2.90E-01 1.90E+00 5.43E+00 WD STJ 289618023 11/2/2011 Ce- 144 8.17E+00 6.30E+00 2.02E+01 WD STJ 289618023 11/2/2011 Co-57 4.25E-01 8.03E-01 2.66E+00 WD STJ 289618023 11/2/2011 Co-58 2.34E-01 7.74E-01 2.52E+00 WD STJ 289618023 11/2/2011 Co-60 5.33E-02 8.5 1E-01 2.80E+00 WD STJ 289618023 11/2/2011 Cr-51 2.75E+00 7.54E+00 2.56E+01 WD STJ 289618023 11/2/2011 Cs-134 1.39E-01 9.35E-01 3.04E+00 WD STJ 289618023 11/2/2011 Cs-137 -1.61E+00 1.14E+00 2.72E+00 WD STJ 289618023 11/2/2011 Fe-59 1.07E+00 1.92E+00 5.11E+00 WD STJ 289618023 11/2/2011 1-131 -1.43E+00 1.50E+00 4.17E+00 WD STJ 289618023 11/2/2011 K-40 -3.32E+01 1.43E+01 3.27E+01 WD STJ 289618023 11/2/2011 La-140 5.07E-01 1.13E+00 3.74E+00 WD STJ 289618023 11/2/2011 Mn-54 -2.85E-01 7.89E-01 2.50E+00 WD STJ 289618023 11/2/2011 Nb-95 1.31E+00 1.10E+00 3.12E+00 WD STJ 289618023 11/2/2011 Ru-103 5.98E-01 8.37E-01 2.79E+00 WD STJ 289618023 11/2/2011 Ru-106 4.48E+00 6.76E+00 2.24E+01 WD STJ 289618023 11/2/2011 Sb-124 9.40E-01 1.74E+00 5.79E+00 WD STJ 289618023 11/2/2011 Sb-125 2.09E+00 2.23E+00 7.45E+00 WD STJ 289618023 11/2/2011 Se-75 1.33E+00 1.15E+00 3.68E+00 WD STJ 289618023 11/2/2011 Th-228 2.19E+00 2.92E+00 6.39E+00 WD STJ 289618023 11/2/2011 Zn-65 -3.19E-01 1.88E+00 5.31E+00 WD STJ 289618023 11/2/2011 Zr-95 5.65E-01 1.46E+00 4.79E+00 WD STJ 289618024 11/2/2011 1-131 -2.86E-01 1.91E-01 6.89E-01 WD LTW 289618025 11/2/2011 Ac-228 3.95E+00 4.46E+00 1.09E+01 WD LTW 289618025 11/2/2011 Ag-108m -1.64E-01 6.01E-01 1.96E+00 WD LTW 289618025 11/2/2011 Ag-Il0m -6.77E-02 6.76E-01 2.16E+00 WD LTW 289618025 11/2/2011 Ba- 140 -1.92E+00 1.04E+00 2.61E+00 WD LTW 289618025 11/2/2011 Be-7 -1.24E+01 6.21E+00 1.63E+01 WD LTW 289618025 11/2/2011 BETA 5.78E-01 9.92E-01 3.07E+00 WD LTW 289618025 11/2/2011 Ce-141 1.13E+00 1.23E+00 3.97E+00 WD LTW 289618025 11/2/2011 Ce-144 -2.02E+00 4.49E+00 1.43E+01 WD LTW 289618025 11/2/2011 Co-57 -3.60E-01 6.20E-01 1.98E+00 WD LTW 289618025 11/2/2011 Co-58 3.04E-01 6.30E-01 2.15E+00 WD LTW 289618025 11/2/2011 Co-60 -4.74E-01 6.78E-01 2.05E+00 WD LTW 289618025 11/2/2011 Cr-51 2.45E+00 5.95E+00 2.01E+01 WD LTW 289618025 11/2/2011 Cs-134 2.18E-01 7.50E-01 2.55E+00 WD LTW 289618025 11/2/2011 Cs-137 6.06E-01 7.59E-01 2.49E+00 WD LTW 289618025 11/2/2011 Fe-59 -9.80E-02 1.37E+00 4.48E+00 WD LTW 289618025 11/2/2011 1-131 -3.17E-01 1.02E+00 3.35E+00 WD LTW 289618025 11/2/2011 K-40 -1.34E+01 1.11E+01 3.24E+01 WD LTW 289618025 11/2/2011 La-140 -1.92E+00 1.04E+00 2.61E+00 WD LTW 289618025 11/2/2011 Mn-54 3.51E-02. 6.47E-01 2.17E+00 WD LTW 289618025 11/2/2011 Nb-95 4.59E-01 6.34E-01 2.17E+00 WD LTW 289618025 11/2/2011 Ru-103 -1.78E+00 8.24E-01 2.07E+00 WD LTW 11/2/2011 Ru-106 -1.35E-01 5.88E+00 289618025 1.90E+01 D-142

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END, CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 289618025 11/2/2011 Sb-124 1.21 E+00 1.60E+00 5.52E+00 WD LTW 289618025 11/2/2011 Sb-125 -1.28E+00 1.80E+00 5.71E+00 WD LTW 289618025 11/2/2011 Se-75 -1.03E+00 8.90E-01 2.81E+00 WD LTW 289618025 11/2/2011 Th-228 7.74E-01 2.47E+00 4.91E+00 WD LTW 289618025 11/2/2011 Zn-65 -3.87E-01 1.36E+00 4.38E+00 WD LTW 289618025 11/2/2011 Zr-95 -1.15E-01 1.04E+00 3.49E+00 WD LTW 289618026 11/2/2011 1-131 1.44E-01 1.61E-01 4.94E-01 WD STJ 295621001 12/28/2011 H-3 1.57E+02 2.16E+02 6.91E+02 WD LTW 295621002 12/28/2011 H-3 -3.28E+01 2.06E+02 6.83E+02 WD STJ 290614023 11/16/2011 Ac-228 -4.36E+00 3.24E+00 5.87E+00 WD STJ 290614023 11/16/2011 Ag-108m -3.53E-01 3.79E-01 1.19E+00 WD STJ 290614023 11/16/2011 Ag-110m -4.36E-01 4.39E-01 1.21E+00 WD STJ 290614023 *11/16/2011 Ba- 140 5.38E-01 6.67E-01 2.24E+00 WD STJ 290614023 '11/16/2011 Be-7 6.80E+00 4.11E+00 1.28E+01 WD STJ 290614023 11/16/2011 Ce-141 1.35E+00 8.34E-01 2.53E+00 WD STJ 290614023 11/16/2011 Ce- 144 -7.07E-01 2.88E+00 9.22E+00 WD STJ 290614023 11/16/2011 Co-57 1.49E-01 3.78E-01 1.22E+00 WD STJ 290614023 11/16/2011 Co-58 -8.06E-02 3.78E-01 1.25E+00 WD STJ 290614023 11/16/2011 Co-60 7.60E-01 4.82E-01 1.58E+00 WD STJ 290614023 11/16/2011 Cr-51 4.68E+00 4.08E+00 1.33E+01 WD STJ 290614023 11/16/2011 Cs-134 -1.30E-01 4.64E-01 1.53E+00 WD STJ 290614023 11/16/2011 Cs-137 1.47E+00 5.44E-01 1.37E+00 M WD STJ 290614023 11/16/2011 Fe-59 -3.93E-01 8.55E-01 2.73E+00 WD STJ 290614023 11/16/2011 1-131 -1.41E+00 8.31E-01 2.43E+00 WD STJ 290614023 11/16/2011 K-40 -1.83E+01 1.01E+01 1.88E+01 WD STJ 290614023 11/16/2011 La-140 5.38E-01 6.67E-01 2.24E+00 WD STJ 290614023 11/16/2011 Mn-54 3.89E-01 3.93E-01 1.30E+00 WD STJ 290614023 11/16/2011 Nb-95 5.22E-01 4.34E-01 1.43E+00 WD STJ 290614023 11/16/2011 Ru-103 -1.39E+00 5.62E-01 1.36E+00 WD STJ 290614023 11/16/2011 Ru-106 -1.55E+00 3.76E+00 1.18E+01 WD STJ 290614023 11/16/2011 Sb-124 -1.07E+00 9.54E-01 2.88E+00 WD STJ 290614023 11/16/2011 Sb-125 9.98E-01 1.15E+00 3.76E+00 WD STJ 290614023 11/16/2011 Se-75 2.02E-01 5.65E-01 1.90E+00 WD STJ 290614023 11/16/2011 Th-228 -1.23E+00 1.26E+00 2.89E-00 WD STJ 290614023 11/16/2011 Zn-65 -2.45E-02 9.07E-01 2.54E+00 WD STJ 290614023 11/16/2011 Zr-95 -1.08E+00 7.78E-01 2.37E+00 WD STJ 290614024 11/16/2011 1-131 -2.OOE-01 1.49E-01 5.39E-01 WD LTW 290614025 11/16/2011 Ac-228 -6.36E+00 3.59E+00 6.34E+00 WD LTW 290614025 11/16/2011 Ag-108m -8.43E-02 4.02E-01 1.34E+00 WD LTW 290614025 11/16/2011 Ag-110m 4.32E-01 4.42E-01 1.44E+00 WD LTW 290614025 11/16/2011 Ba-140 6.70E-02 7.03E-01 2.35E+00 WD LTW 290614025 11/16/2011 Be-7 -1.86E-01 6.38E+00 1.36E+01 WD LTW 290614025 11/16/2011 BETA 6.64E-01 9.79E-01 3.01E+00 WD LTW 290614025 11/16/2011 Ce-141 6.23E-01 9.17E-01 2.69E+00 WD LTW 290614025 11/16/2011 Ce-144 1.22E+00 3.OOE+00 1.00E+01 WD LTW 290614025 11/16/2011 Co-57 -4. 1OE-03 3.85E-01 1.29E+00 WD LTW 290614025 11/16/2011 Co-58 -3.64E-01 4.78E-01 1.49E+00 WD LTW 290614025 11/16/2011 Co-60 -8.38E-01 5.11E-01 1.45E+00 WD LTW 290614025 11/16/2011 Cr-51 3.59E+00 4.43E+00 1.42E+01 WD LTW 290614025 11/16/2011 Cs-134 1.18E+00 6.05E-01 1.83E+00 WD LTW 290614025 11/16/2011 Cs-137 3.59E-01 4.76E-01 1.56E+00 D-143

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 290614025 11/16/2011 Fe-59 -7.71E-01 9.64E-01 3.06E+00 U WD LTW 290614025 11/16/2011 1-131 4.57E-01 8.21E-01 2.78E+00 U WD LTW 290614025 11/16/2011 K-40 4.78E-01 9.90E+00 1.44E+01 U WD LTW 290614025 11/16/2011 La-140 6.70E-02 7.03E-01 2.35E+00 U WD LTW 290614025 11/16/2011 Mn-54 -3.54E-01 4.41E-01 1.43E+00 U WD LTW 290614025 11/16/2011 Nb-95 8.93E-01 5.48E-01 1.70E+00 U WD LTW 290614025 11/16/2011 Ru-103 -2.99E-01 4.74E-01 1.54E+00 U WD LTW 290614025 11/16/2011 Ru-106 -2.84E+00 4.19E+00 1.34E+01 U WD LTW 290614025 11/16/2011 Sb-124 -1.37E+00 1.06E+00 3.18E+00 U WD LTW 290614025 11/16/2011 Sb-125 -4.51E-01 1.21E+00 4.OOE+00 U WD LTW 290614025 11/16/2011 Se-75 1.82E-01 6.06E-01 1.97E+00 U WD LTW 290614025 11/16/2011 Th-228 -1.31E-01 1.40E+00 3.24E+00 U WD LTW 290614025 11/16/2011 Zn-65 -2.37E+00 1.12E+00 3.OOE+00 U WD LTW 290614025 11/16/2011 Zr-95 -1.44E-02 8.01E-01 2.59E+00 U WD LTW 290614026 11/16/2011 1-131 -1.49E-01 2.41E-01 8.24E-01 U WD STJ 291911001 1.1/16/2011 BETA 2.12E+00 1.21E+00 3.53E+00 U WD STJ 291277023 11/30/2011 Ac-228 3.93E+00 3.88E+00 7.35E+00 U WD STJ 291277023 11/30/2011 Ag-108m 2.43E-01 4.71E-01 1.58E+00 U WD STJ 291277023 11/30/2011 Ag-110m -2.06E-01 5.09E-01 1.64E+00 U WD STJ 291277023 11/30/2011 Ba-140 1.39E-01 7.74E-01 2.60E+00 U WD STJ 291277023 11/30/2011 Be-7 -4.75E+00 4.58E+00 1.45E+01 U WD STJ 291277023 11/30/2011 BETA 2.46E+00 1.26E+00 3.47E+00 U WD STJ 291277023 11/30/2011 Ce-141 8.02E-01 9.65E-01 3.09E+00 U WD STJ 291277023 11/30/2011 Ce-144 -3.22E+00 3.83E+00 1.15E+01 U WD STJ 291277023 11/30/2011 Co-57 .- 4.33E-02 4.64E-01 1.56E+00 U WD STJ 291277023 11/30/2011 Co-58 -1.00E+00 7.22E-01 1.73E+00 U WD STJ 291277023 11/30/2011 Co-60 -8.15E-01 5.87E-01 1.70E+00 U WD STJ 291277023 11/30/2011 Cr-51 2.33E+00 5.OOE+00 1.62E+01 U WD STJ 291277023 11/30/2011 Cs-134 1.04E+00 6.83E-01 2.16E+00 U WD STJ 291277023 11/30/2011 Cs-137 8.76E-01 6.OOE-01 1.92E+00 U WD STJ 291277023 11/30/2011 Fe-59 -1.33E+00 1.07E+00 3.24E+00 U WD STJ 291277023 11/30/2011 1-131 2.45E+00 9.76E-01 2.82E+00 U WD STJ 291277023 11/30/2011 K-40 3.25E+00 1.12E+01 1.83E+01 U WvrD STJ 291277023 11/30/2011 La-140 1.39E-01 7.74E-01 2.60E+00 U WD STJ 291277023 11/30/2011 Mn-54 -5.70E-01 5.22E-01 1.65E+00 U WD STJ 291277023 11/30/2011 Nb-95 8.43E-01 5.83E-01 1.85E+00 U WD STJ 291277023 11/30/2011 Ru-103 -1.13E+00 6.96E-01 1.75E+00 U WD STJ 291277023 11/30/2011 Ru-106 -7.33E-01 4.79E+00 1.57E+01 U WD STJ 291277023 11/30/2011 Sb-124 3.05E-01 1.27E+00 4.26E+00 U WD STJ 291277023 11/30/2011 Sb-125 -1.95E+00 1.53E+00 4.78E+00 U WD STJ 291277023 11/30/2011 Se-75 4.53E-01 7.50E-01 2.44E+00 U WD STJ 291277023 11/30/2011 Th-228 2.90E+00 1.89E+00 3.97E+00 U WD STJ 291277023 11/30/2011 Zn-65 -3.40E+00 1.41E+00 3.46E+00 U WD STJ 291277023 11/30/2011 Zr-95 7.27E-01 9.64E-01 3.14E+00 U WD STJ 291277024 11/30/2011 1-131 -1.78E-02 1.34E-01 4.44E-01 U WD LTW 291277025 11/30/2011 Ac-228 2.35E+00 3.35E+00 7.29E+00 U WD LTW 291277025 11/30/2011 Ag-108m -5.88E-01 4.57E-01 1.40E+00 U WD LTW 291277025 11/30/2011 Ag-110m -9.69E-02 4.66E-01 1.49E+00 U WD LTW 291277025 11/30/2011 Ba-140 -4.01E+00 1.63E+00 2.49E+00 U WD LTW 291277025 11/30/2011 Be-7 5.93E-02 4.25E+00 1.41E+01 U WD LTW 291277025 11/30/2011 BETA 3.79E+00 1.33E+00 3.34E+00 M D-144

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD LTW 291277025 11/30/2011 Ce-141 1.26E+00 9.72E-01 2.84E+00 U WD LTW 291277025 11/30/2011 Ce-144 -1.41E-02 3.40E+00 1.09E+01 U WD LTW 291277025 11/30/2011 Co-57 2.91E-01 4.30E-01 1.44E+00 U WD LTW 291277025 11/30/2011 Co-58 -1.06E+00 9.26E-01 1.63E+00 U WD LTW 291277025 11/30/2011 Co-60 5.03E-02 5.60E-01 1.81E+00 U WD LTW 291277025 11/30/2011 Cr-51 -3.02E+00 4.41E+00 1.46E+01 U WD LTW 291277025 11/30/2011 Cs-134 2.68E-01 1.12E+00 2.17E+00 U WD LTW 291277025 11/30/2011 Cs-137 6.73E-01 5.29E-01 1.71E+00 U WD LTW 291277025 11/30/2011 Fe-59 -1.20E+00 1.05E+00 3.14E+00 U WD LTW 291277025 11/30/2011 1-131 9.41E-02 7.59E-01 2.57E+00 U WD LTW 291277025 11/30/2011 K-40 -7.81E+00 8.93E+00 2.48E+01 U WD LTW 291277025 11/30/2011 La-140 -4.01E+00 1.62E+00 2.49E+00 U WD LTW 291277025 11/30/2011 Mn-54 -9.78E-02 5.04E-01 1.68E+00 U WD LTW 291277025 11/30/2011 Nb-95 1.01E+00 5.37E-01 1.73E+00 U WD LTW 291277025 11/30/2011 Ru-103 -1.51E-01 5.49E-01 1.80E+00 U WD LTW 291277025 11/30/2011 Ru-106 -1.98E+00 4.82E+00 1.54E+01 U WD LTW 291277025 11/30/2011 Sb-124 1.07E+00 1.26E+00 4.25E+00 U WD LTW 291277025 11/30/2011 Sb-125 -2.78E+00 1.43E+00 4.OOE+00 U WD LTW 291277025 11/30/2011 Se-75 -3.24E-01 7.20E-01 2.28E+00 U WD LTW 291277025 11/30/2011 Th-228 8.70E-01 1.77E+00 3.81E+00 U WD LTW 291277025 11/30/2011 Zn-65 -2.92E+00 1.32E+00 3.30E+00 U WD LTW 291277025 11/30/2011 Zr-95 6.21E-01 8.28E-01 2.82E+00 U WD LTW 291277026 11/30/2011 1-131 -1.35E-01 1.15E-01 4.08E-01 U WD STJ 292211023 12/14/2011 Ac-228 -1.23E-01 3.50E+00 7.84E+00 U WD STJ 292211023 12/14/2011 Ag-108m -4.08E-01 4.95E-01 1.54E+00 U WD STJ 29221i023 12/14/2011 Ag-Il0m -9.21E-01 5.66E-01 1.65E+00 U WD STJ 292211023 12/14/2011 Ba-140 -1.08E+00 1.08E+00 3.22E+00 U WD STJ 292211023 12/14/2011 Be-7 -7.29E+00 5.38E+00 1.58E+01 U WD STJ 292211023 12/14/2011 BETA 2.63E-01 1.03E+00 3.32E+00 U WD STJ 292211023 12/14/2011 Ce-141 -9.15E-01 1.01E+00 3.12E+00 U WD STJ 292211023 12/14/2011 Ce-144 2.67E+00 3.75E+00 1.15E+01 U WD STJ 292211023 12/14/2011 Co-57 -2.75E-01 4.60E-01 1.46E+00 U WD STJ 292211023 12/14/2011 Co-58 6.94E-01 5.52E-01 1.80E+00 U WD STJ 292211023 12/14/2011 Co-60 -1.51E-01 6.09E-01 1.98E+00 U WD STJ 292211023 12/14/2011 Cr-51 -3.78E+00 5.25E+00 1.68E+01 U WD STJ 292211023 12/14/2011 Cs-134 1.23E+00 6.90E-01 2.19E+00 U WD STJ 292211023 12/14/2011 Cs-137 9.14E-02 9.85E-01 2.1OE+00 U WD STJ 292211023 12/14/2011 Fe-59 1.82E-01 1.15E+00 3.84E+00 U WD STJ 292211023 12/14/2011 1-131 -2.47E-01 1.09E+00 3.56E+00 U WD STJ 292211023 12/14/2011 K-40 3.80E+00 1.38E+01 1.69E+01 U WD STJ 292211023 12/14/2011 La-140 -1.08E+00 1.08E+00 3.22E+00 U WD STJ 292211023 12/14/2011 Mn-54 -6.90E-01 5.22E-01 1.53E+00 U

- WD STJ 292211023 12/14/2011 Nb-95 4.98E-01 5.59E-01 1.85E+00 U WD STJ 292211023 12/14/2011 Ru-103 -1.02E+00 6.52E-01 1.84E+00 U WD STJ 292211023 12/14/2011 Ru-106 -9.55E+00 5.35E+00 1.53E+01 U WD STJ 292211023 12/14/2011 Sb-124 -1.46E+00 1.38E+00 4.23E+00 U WD STJ 292211023 12/14/2011 Sb-125 1.29E-01 1.47E+00 4.76E+00 U WD STJ 292211023 12/14/2011 Se-75 -1.28E-02 7.25E-01 2.42E+00 U WD STJ 292211023 12/14/2011 Th-228 8.24E-01 1.91E+00 3.87E+00 U WD STJ 292211023 12/14/2011 Zn-65 -1.84E+00 1.24E+00 3.64E+00 U WD STJ 292211023 12/14/2011 Zr-95 -8.73E-01 9.41E-01 2.91E+00 U D-145

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

I WD STJ 292211024 12/14/2011 1-131 6.23E-02 9.71E-02 3.04E-01 U WD LTW 292211025 12/14/2011 Ac-228 8.43E+00 3.66E+00 .6.49E+00 UI WD LTW 292211025 12/14/2011 Ag-108m 1.31E-01 4.17E-01 1.36E+00 U WD LTW 292211025 12/14/2011 Ag-110m 4.07E-02 4.36E-01 1.46E+00 U WD LTW 292211025 12/14/2011 Ba-140 1.19E+00 9.39E-01 3.16E+00 U WD LTW 292211025 12/14/2011 Be-7 1.05E+00 4.32E+00 1.40E+01 U WD LTW 292211025 12/14/2011 BETA 4.33E+00 1.35E+00 3.66E+00 WD LTW 292211025 12/14/2011 Ce-141 -1.94E-01 1.19E+00 2.98E+00 U WD LTW 292211025 12/14/2011 Ce-144 1.36E-02 3.12E+00 1.05E+01 U WD LTW 292211025 12/14/2011 Co-57 3.91E-01 4.12E-01 1.38E+00 U WD LTW 292211025 12/14/2011 Co-58 7.33E-01 5.57E-01 1.63E+00 U WD LTW 292211025 12/14/2011 Co-60 8.37E-01 5.22E-01 1.69E+00 U WD LTW 292211025 12/14/2011 Cr-51 -8.62E+00 5.02E+00 1.44E+01 U WD LTW 292211025 12/14/2011 Cs-134 1.39E+00 6.38E-01 1.97E+00 U WD LTW 292211025 12/14/2011 Cs-137 5.76E-01 4.84E-01 1.62E+00 U WD LTW 292211025 12/14/2011 Fe-59 -6.80E-01 9.98E-01 3.11E+00 U WD LTW 292211025 12/14/2011 1-131 5.96E-01 1.04E+00 3.42E+00 U WD LTW 292211025 12/14/2011 K-40 1.61E-01 1.30E+01 1.50E+01 U WD LTW 292211025 12/14/2011 La-140 1.19E+00 9.37E-01 3.16E+00 U WD LTW 292211025 12/14/2011 Mn-54 3.32E-01 4.42E-01 1.48E+00 U WD LTW 292211025 12/14/2011 Nb-95 3.87E-01 6.28E-01 1.54E+00 U WD LTW 292211025 12/14/2011 Ru-103 5.94E-01 5.55E-01 1.78E+00 U WD LTW 292211025 12/14/2011 Ru-106 3.99E+00 4.23E+00 1.42E+01 U WD LTW 292211025 12/14/2011 Sb-124 -6.31E-01 1.13E+00 3.60E+00 U WD LTW 292211025,12/14/2011 Sb-125 -1.58E+00 1.31E+00 3.91E+00 U WD LTW 292211025 12/14/2011 Se-75 -2.33E-01 6.43E-01 2.10E+00 U WD LTW 292211025 12/14/2011 Th-228 5.95E-01 1.65E+00 3.34E+00 U WD LTW 292211025 12/14/2011 Zn-65 -5.28E-01 9.77E-01 3.08E+00 U WD LTW 292211025 12/14/2011 Zr-95 1.06E+00 8.58E-01 2.85E+00 U WD LTW 292211026 12/14/2011 1-131 -5.25E-04 8.48E-02 2.79E-01 U WD LTW 294439001 12/14/2011 Th-228 -9.67E-03 2.03E-01 8.90E-01 U WD LTW 294439001 12/14/2011 Th-230 1.72E-01 1.48E-01 5.33E-01 U WD LTW 294439001 12/14/2011 Th-232 1.89E-01 1.15E-01 2.08E-01 U WD LTW 294439001 12/14/2011 U-233/234 -7.47E-02 1.06E-01 5.50E-01 U WD LTW 294439001 12/14/2011 U-235/236 -6.15E-02 1.38E-01 6.80E-01 U WD LTW 294439001 12/14/2011 U-238 0.OOE+00 9.95E-02 4.77E-01 U WD STJ 292858023 12/28/2011 Ac-228 3.27E+00 3.87E+00 1.02E+01 U WD STJ 292858023 12/28/2011 Ag-108m 2.49E-01 5.46E-01 1.82E+00 U WD STJ 292858023 12/28/2011 Ag-Il0m -7.22E+00 1.88E+00 2.19E+00 U WD STJ 292858023 12/28/2011 Ba-140 -2.27E+00 1.65E+00 4.68E+00 U WD STJ 292858023 12/28/2011 Be-7 -2.17E+00 6.26E+00 2.03E+01 U WD STJ 292858023 12/28/2011 BETA 2.31E+00 1.25E+00 3.54E+00 U WD STJ 292858023 12/28/2011 Ce-141 -4.66E+00 1.96E+00 3.57E+00 U WD STJ 292858023 12/28/2011 Ce-144 -9.17E-01 3.64E+00 1.22E+01 U WD STJ 292858023 12/28/2011 C6-57 1.50E-01 4.42E-01 1.50E+00 U WD STJ 292858023 12/28/2011 Co-58 -4.83E-01 7.42E-01 2.38E+00 U WD STJ 292858023 12/28/2011 Co-60 -3.10E-01 1.01E+00 2.49E+00 U WD STJ 292858023 12/28/2011 Cr-51 -2.51E-01 6.53E+00 2.21E+01 U WD STJ 292858023 12/28/2011 Cs-134 1.41E+00 8.53E-01 2.77E+00 U WD STJ 292858023 12/28/2011 Cs-137 -1.96E+00 1.46E+00 3.82E+00 U WD STJ 292858023 12/28/2011 Fe-59 1.38E+00 1.64E+00 5.36E+00 U D-146

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WD STJ 292858023 12/28/2011 1-131 -2.74E+00 1.82E+00 5.5 1E+00 WD STJ 292858023 12/28/2011 K-40 -2.28E+01 1.26E+01 3.OOE+01 WD STJ 292858023 12/28/2011 La-140 -2.27E+00 1.65E+00 4.68E+00 WD STJ 292858023 12/28/2011 Mn-54 -5.72E-01 6.56E-01 2.06E+00 WD STJ 292858023 12/28/2011 Nb-95 9.99E-01 7.38E-01 2.44E+00 WD STJ 292858023 12/28/2011 Ru-103 8.14E-01 7.64E-01 2.49E+00 WD STJ 292858023 12/28/2011 Ru-106 1.24E+01 6.81E+00 2.11E+01 WD STJ 292858023 12/28/2011 Sb-124 2.40E+00 1.71E+00 5.70E+00 WD STJ 292858023 12/28/2011 Sb-125 3.45E+00 1.95E+00 *6.18E+00 WD STJ 292858023 12/28/2011 Se-75 3.13E-01 8.68E-01 2.79E+00 WD STJ 292858023 12/28/2011 Th-228 1.06E+00 2.5 1E+00 4.12E+00 WD STJ 292858023 12/28/2011 Zn-65 -3.08E+00 1.59E+00 4.07E+00 WD STJ 292858023 12/28/2011 Zr-95 -9.54E-01 1.29E+00 4.13E+00 WD STJ 292858024 12/28/2011 1-131 -2.81E-01 2.31E-01 8.31E-01 WD LTW 292858025 12/28/2011 Ac-228 -3.56E-01 3.52E+00 8.32E+00 WD LTW 292858025 12/28/2011 Ag-108m 2.88E-01 5.45E-01 1.83E+00 WD LTW 292858025 12/28/2011 Ag-il0m 4.33E-01 6.08E-01 2.OOE+00 WD LTW 292858025 12/28/2011 Ba- 140 -1.75E+00 1.27E+00 3.74E+00 WD LTW 292858025 12/28/2011 Be-7 -7.22E+00 5.93E+00 1.84E+01 WD LTW 292858025 12/28/2011 BETA -6.90E-01 7.73E-01 2.76E+00 WD LTW 292858025 12/28/2011 Ce- 141 1.25E+00 1.20E+00 3.94E+00 WD LTW 292858025 12/28/2011 Ce- 144 4.30E+00 4.27E+00 1.36E+01 WD LTW 292858025 12/28/2011 Co-57 2.53E-01 5.17E-01 1.74E+00 WD LTW 292858025 12/28/2011 Co-58 -1.32E+00 7.26E-01 1.97E+00 WD LTW 292858025 12/28/2011 Co-60 1.79E-01 6.23E-01 2.05E+00 WD LTW 292858025 12/28/2011 Cr-5S 7.75E+00 6.81E+00 2.16E+01 WD LTW 292858025 12/28/2011 Cs-134 -4.80E-01 7.49E-01 2.34E+00 WD LTW 292858025 12/28/2011 Cs-137 2.71E-01 6.54E-01 2.15E+00 WD LTW 292858025 12/28/2011 Fe-59 -1.40E+00 1.35E+00 4.17E+00 WD LTW 292858025 12/28/2011 1-131 -1.83E+00 1.74E+00 5.57E+00 WD LTW 292858025 12/28/2011 K-40 2.65E+01 1.47E+01 2.11E+01 WD LTW 292858025 12/28/2011 La-140 -1.75E+00 1.27E+00 3.74E+00 WD LTW 292858025 12/28/2011 Mn-54 -2.36E+00 1.29E+00 1.90E+00 WD LTW 292858025 12/28/2011 Nb-95 -4.94E-02 8.32E-01 2.15E+00 WD LTW 292858025 12/28/2011 Ru-I103 -1.26E+00 7.57E-01 2.21E+00 WD LTW 292858025 12/28/2011 Ru-106 6.07E+00 5.64E+00 1.84E+01 WD LTW 292858025 12/28/2011 Sb- 124 5.24E-01 1.55E+00 5.21E+00 WD LTW 292858025 12/28/2011 Sb-125 -8.03E-01 1.61E+00 5.31E+00 WD LTW 292858025 12/28/2011 Se-75 -2.02E-01 8.33E-01 2.69E+00 WD LTW 292858025 12/28/2011 Th-228 -2.07E+00 1.59E+00 4.29E+00 WD LTW 292858025 12/28/2011 Zn-65 -6.73E-02 1.51E+00 4.28E+00 WD LTW 292858025 12/28/2011 Zr-95 1.67E+00 1.24E+00 3.97E+00 WD LTW 292858026 12/28/2011 1-131 -2.14E-01 1.33E-01 4.96E-01 D-147

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. -MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-2 271757001 2/1/2011 Ac-228 -4.45E+00 3.55E+00 8.37E+00 U WG W-2 271757001 2/1/2011 Ag-108m -6.92E-01 5.61E-01 1.75E+00 U WG W-2 271757001 2/1/2011 Ag-i1 I m 8.33E-01 6.55E-01 2.14E+00 U WG W-2 271757001 2/1/2011 Ba-140 5.27E-01 1.19E+00 3.95E+00 U WG W-2 271757001 2/1/2011 Be-7 9.66E+00 5.71E+00 1.84E+01 U WG W-2 271757001 2/1/2011 Ce- 141 3.18E-01 1.17E+00 3.61E+00 U WG W-2 271757001 2/1/2011 Ce- 144 2.21E+00 4.08E+00 1.36E+01 U WG W-2 271757001 2/1/2011 Co-57 3.83E-01 5.28E-01 1.75E+00 U WG W-2 271757001 2/1/2011 Co-58 -1.15E+00 7.23E-01 2.05E+00 U WG W-2 271757001 2/1/2011 Co-60 -3.49E-01 6.8 1E-01 2.19E+00 U WG W-2 271757001 2/1/2011 Cr-51 8.50E-01 6.08E+00 1.96E+01 U WG W-2 271757001 2/1/2011 Cs-134 -6.75E-02 7.23E-01 2.35E+00 U WG W-2 271757001 2/1/2011 Cs-137 -3.35E-01 6.86E-01 2.21E+00 U WG W-2 271757001 2/1/2011 Fe-59 -2.53E+00 1.34E+00 3.68E+00 U WG W-2 271757001 2/1/2011 H-3 0.OOE+00 1.51E+02 4.97E+02 U WG W-2 271757001 2/1/2011 1-131 1.98E+00 1.41E+00 4.43E+00 U WG W-2 271757001 2/1/2011 K-40 3.93E+01 1.54E+01 2.09E+01 WG W-2 271757001 2/1/2011 La-140 5.27E-01 1.19E+00 3.95E+00 U WG W-2 271757001 2/1/2011 Mn-54 1.71E-01 6.32E-01 2.07E+00 U WG W-2 271757001 2/1/2011 Nb-95 -4.21E-01 6.57E-01 2.08E+00 U WG W-2 271757001 2/1/2011 Ru-103 2.80E-01 6.61E-01 2.22E+00 U WG W-2 271757001 2/1/2011 Ru-106 2.90E+00 5.61E+00 1.87E+01 U WG W-2 271757001 2/1/2011 Sb-124 8.86E-01 1.60E+00 5.32E+00 U WG W-2 271757001 2/1/2011 Sb-125 2.01E+00 1.69E+00 5.63E+00 U WG W-2 271757001 2/1/2011 Se-75 -4.28E-01 8.34E-01 2.66E+00 U WG W-2 271757001 2/1/2011 Th-228 1.92E+00 1.85E+00 3.94E+00 U WG W-2 271757001 2/1/2011 Zn-65 -1.80E+00 1.45E+00 4.42E+00 U WG W-2 271757001 2/1/2011 Zr-95 -8.82E-01 1.16E+00 3.62E+00 U WG W-7 271757002 2/1/2011 Ac-228 6.93E+00 3.85E+00 8.11E+00 U WG W-7 271757002 2/1/2011 Ag-108m 7.1OE-01 5.62E-01 1.78E+00 U WG W-7 271757002 2/1/2011 Ag-110m -1.05E+00 5.98E-01 1.71E+00 U WG W-7 271757002 2/1/2011 Ba-140 1.42E+00 1.07E+00 3.52E+00 U WG W-7 271757002. 2/1/2011 Be-7 -4.18E-01 5.04E+00 1.70E+01 U WG W-7 271757002 2/1/2011 Ce- 141 -4.01E+00 1.42E+00 3.44E+00 U WG W-7 271757002 2/1/2011 Ce- 144 -2.28E+00 4.02E+00 1.25E+01 U WG W-7 271757002 2/1/2011 Co-57 -4.44E-01 5.45E-01 1.68E+00 U WG W-7 271757002 2/1/2011 Co-58 8.79E-02 5.83E-01 1.91E+00 U WG W-7 271757002 2/1/2011 Co-60 -2.30E-01 6.07E-01 1.96E+00 U WG W-7 271757002 2/1/2011 Cr-51 5.44E+00 5.85E+00 1.90E+01 U WG W-7 271757002 2/1/2011 Cs-134 -1.21E-01 6.35E-01 2.06E+00 U WG W-7 271757002 2/1/2011 Cs-137 3.54E-01 6.05E-01 2.02E+00 U WG W-7 271757002 2/1/2011 Fe-59 3.88E-01 1.17E+00 3.96E+00 U WG W-7 271757002 2/1/2011 H-3 3.16E+02 1.69E+02 4.95E+02 U WG W-7 271757002 2/1/2011 1-131 -6.11E-02 1.22E+00 3.95E+00 U WG W-7 271757002 2/1/2011 K-40 2.80E+00 1.44E+01 1.89E+01 U WG W-7 271757002 2/1/2011 La-140 1.42E+00 1.07E+00 3.52E+00 U WG W-7 271757002 2/1/2011 Mn-54 6.70E-01 5.84E-01 1.90E+00 U WG W-7 271757002 2/1/2011 Nb-95 6.07E-01 6.22E-01 2.04E+00 U WG W-7 271757002 2/1/2011 Ru-103 1.09E+00 6.68E-01 2.15E+00 U WG W-7 271757002 2/1/2011 Ru-I106 -1.30E+00 5.12E+00 1.69E+01 U WG W-7 271757002 2/1/2011 Sb-124 3.48E+00 1.65E+00 5.19E+00 U D-148

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-7 271757002 2/1/2011 Sb-125 -1.89E+00 1.65E+00 4.96E+00 U WG W-7 271757002 2/1/2011 Se-75 -2.73E-01 8.18E-01 2.68E+00 U WG W-7 271757002 2/1/2011 Th-228 -9.25E-01 1.60E+00 4.43E+00 U WG W-7 271757002 2/1/2011 Zn-65 -1.72E+00 1.30E+00 3.27E+00 U WG W-7 271757002 2/1/2011 Zr-95 -5.70E-01 1.03E+00 3.30E+00 U WG W-10 271757003 2/1/2011 Ac-228 -3.89E+00 3.69E+00 8.89E+00 U WG W-10 271757003 2/1/2011 Ag-108m -2.24E-01 5.24E-01 1.71E+00 U WG W-10 271757003 2/1/2011 Ag-110m -8.03E+00 2.04E+00 1.94E+00 U WG W-10 271757003 2/1/2011 Ba-140 3.55E-01 1.26E+00 4.16E+00 U WG W-10 271757003 2/1/2011 Be-7 -7.58E+00 6.09E+00 1.85E+01 U WG W-10 271757003 2/1/2011 Ce-141 -3.39E+00 1.70E+00 3.41E+00 U WG W-10 271757003 2/1/2011 Ce- 144 -1.70E+00 3.56E+00 1.18E+01 U WG W-10 271757003 2/1/2011 Co-57 1.56E-01 4.52E-01 1.53E+00 U WG W-10 271757003 2/1/2011 Co-58 4.47E-01 7.12E-01 2.39E+00 U WG W-10 271757003 2/1/2011 Co-60 -3.75E-01 7.13E-01 2.29E+00 U WG W-10 271757003 2/1/2011 Cr-51 -2.53E+00 5.88E+00 1.97E+01 U WG W-10 271757003 2/1/2011 Cs-134 7.65E-01 8.05E-01 2.70E+00 U WG W-10 271757003 2/1/2011 Cs-137 -2.45E+00 1.51E+00 3.85E+00 U WG W-10 271757003 2/1/2011 Fe-59 1.10E+00 1.52E+00 4.98E+00 U WG W-10 271757003 2/1/2011 H-3 1.43E+02 1.58E+02 4.95E+02 U WG W-10 271757003 2/1/2011 1-131 -1.03E+00 1.36E+00 4.41 E+00 U WG W-10 271757003 2/1/2011 K-40 7.78E+00 1.38E+01 2.28E+01 U WG W-10 271757003 2/1/2011 La-140 3.55E-01 1.26E+00 4.16E+00 U WG W-10 271757003 2/1/2011 Mn-54 -8.62E-02 6.75E-01 2.22E+00 U WG W-10 271757003 2/1/2011 Nb-95 6.54E-01 7.00E-01 2.35E+00 U WG W-10 271757003 2/1/2011 Ru-103 -1.lIE+00 8.06E-01 2.40E+00 U WG W-10 271757003 2/1/2011 Ru-106 -1.22E+01 6*59E+00 1.77E+01 U WG W-10 271757003 2/1/2011 Sb-124 2.46E+00 1.68E+00 5.60E+00 U WG W-10 271757003 2/1/2011 Sb-125 2.09E-01 1.63E+00 5.44E+00 U WG W-10 271757003 2/1/2011 Se-75 3.88E-01 8.10E-01 2.61E+00 U WG W-10 271757003 2/1/2011 Th-228 2.09E+00 .2.22E+00 4.OOE+00 U WG W-10 271757003 2/1/2011 Zn-65 -3.99E+00 1.78E+00 4.30E+00 U WG W-10 271757003 2/1/2011 Zr-95 1.24E+00 1.23E+00 4.14E+00 U WG W-1l 271757004 2/1/2011 Ac-228 7.29E+00 4.85E+00 8.90E+00 U WG W-1 I 271757004 2/1/2011 Ag-108m -3.44E-01 6.06E-01 1.94E+00 U WG W-1 271757004 2/1/2011 Ag-110m -1.15E+00 6.65E-01 1.94E+00 U WG W-1 I 271757004 2/1/2011 Ba- 140 8.67E-01 1.15E+00 3.87E+00 U WG W-1I 271757004 2/1/2011 Be-7 -2.92E+00 6.08E+00 1.94E+01 U WG W-1I 271757004 2/1/2011 Ce-i141 2.48E+00 1.72E+00 4.68E+00 U WG W-1I 271757004 2/1/2011 Ce- 144 -2.95E+00 5.79E+00 1.61E+01 U WG W-1I 271757004 2/1/2011 Co-57 -7.06E-01 6.89E-01 2.14E+00 U WG W-1I 271757004 2/1/2011 Co-58 5.42E-01 6.76E-01 2.25E+00 U WG W-1I 271757004 2/1/2011 Co-60 1.19E-01 6.56E-01 2.21E+00 U WG W-1I 271757004 2/1/2011 Cr-51 -3.47E+00 6.90E+00 2.25E+01 U WG W-1I 271757004 2/1/2011 Cs- 134 2.04E-01 8.02E-01 2.68E+00 U WG W-1I 271757004 2/1/2011 Cs-137 7.93E-01 6.82E-01 2.27E+00 U WG W-lI 271757004 2/1/2011 Fe-59 1.85E-01 1.30E+00 4.26E+00 U WG W-il 271757004 2/1/2011 H-3 2.67E+02 1.65E+02 4.92E+02 U WG W-lI 271757004 2/1/2011 1-131 -2.57E-01 1.53E+00 5.02E+00 U WG W-lI 271757004 2/1/2011 K-40 2.03E+01 1.27E+01 1.64E+01 UI WG W-lI 271757004 2/1/2011 La-140 8.67E-01 1.15E+00 3.87E+00 U D-149

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-11 271757004 2/1/2011 Mn-54 2.18E-01 6.38E-01 2.13E+00 U WG W-11 271757004 2/1/2011 Nb-95 1.62E+00 7.88E-01 2.44E+00 U WG W-11 2/1/201.1 271757004 Ru-103 -1.35E+00 8.38E-01 2.41E+00 U WG W-11 271757004 2/1/2011 Ru-106 1.73E+00 5.75E+00 1.94E+01 U WG W-11 271757004 2/1/2011 Sb-124 -1.96E+00 1.52E+00 4.44E+00 U WG W-11 271757004 2/1/2011 Sb-125 2.53E+00 1.96E+00 6.30E+00 U WG W-11 271757004 2/1/2011 Se-75 6.71E-01 9.66E-01 3.22E+00 U WG W-11 271757004 2/1/2011 Th-228 -1.07E-01 1.87E+00 5.22E+00 U WG W-11 271757004 2/1/2011 Zn-65 1.38E+00 1.51E+00 4.311E+00 U WG W-11 271757004 2/1/2011 Zr-95 1.40E-01 1.17E+00 3.89E+00 U WG W-12 271757005 2/1/2011 Ac-228 -1.62E+00 3.45E+00 9.01E+00 U WG W-12 271757005 2/1/2011 Ag-108m -5.92E-01 5.67E-01 1.72E+00 U WG W-12 271757005 2/1/2011 Ag-110m -4.33E-01 5.67E-01 1.81E+00 U WG W-12 271757005 2/1/2011 Ba- 140 -2.97E-01 1.13E+00 3.59E+00 U WG W-12 271757005 2/1/2011 Be-7 3.64E+00 5.48E+00 1.78E+01 U WG W-12 271757005 2/1/2011 Ce- 141 1.17E+00 1.18E+00 3.73E+00 U WG W-12 271757005 2/1/2011 Ce-144 2.86E+00 4.09E+00 1.32E+01 U WG W-12 271757005 2/1/2011 Co-57 -1.42E-02 5.05E-01 1.63E+00 U WG W-12 271757005 2/1/2011 Co-58 -2.41 E+00 8.54E-01 1.79E+00 U WG W-12 271757005 2/1/2011 Co-60 2.02E-01 6.88E-01 2.29E+00 U WG W-12 271757005 2/1/2011 Cr-51 3.33E+00 6.18E+00 2.05E+01 U WG W-12 271757005 2/1/2011 Cs-134 3.61E-02 7.28E-01 2.39E+00 U WG W-12 271757005 2/1/2011 Cs-137 8.13E-01 6.25E-01 2.06E+00 U WG W-12 271757005 2/1/2011 Fe-59 -2.94E+00 1.48E+00 3.95E+00 U WG W-12 271757005 2/1/2011 H-3 -6.44E+01 1.47E+02 4.96E+02 U WG W-12 271757005 2/1/2011 I1-31 5.68E-01 1.41E+00 4.65E+00 U WG W-12 271757005 2/1/2011 K-40 4.43E+00 1.15E+01 3.09E+01 U WG W-12 271757005 2/1/2011 La-140 -2.97E-01 1.13E+00 3.59E+00 U WG W-12 271757005 2/1/2011 Mn-54 2.80E-02 6.19E-01 2.02E+00 U WG W-12 271757005 2/1/2011 Nb-95 6.54E-01 6.45E-01 2.13E+00 U WG W-12 271757005 2/1/2011 Ru-103 -1.13E+00 8.11E-01 1.99E+00 U WG W-12 271757005 2/1/2011 Ru-106 3.24E+00 5.05E+00 1.70E+01 U WG W-12 271757005 2/1/2011 Sb-124 -1.43E+00 1.59E+00 4.95E+00 U WG W-12 271757005 2/1/2011 Sb-125 -2.21E-02 1.70E+00 5.50E+00 U WG W-12 271757005 2/1/2011 Se-75 1.61E-01 7.88E-01 2.64E+00 U WG W-12 271757005 2/1/2011 Th-228 1.81E+00 1.70E+00 3.64E+00 U WG W-12 271757005 2/1/2011 Zn-65 -1.98E+00 1.50E+00 4.53E+00 U WG W-12 271757005 2/1/2011 Zr-95 1.12E+00 1.14E+00 3.77E+00 U WG W-13 271757006 2/1/2011 Ac-228 -4.49E+00 3.72E+00 9.13E+00 U WG W-13 271757006 2/1/2011 Ag-108m 4.53E-01 6.25E-01 2.02E+00 U WG W-13 271757006 2/1/2011 Ag-1 10m -9.26E-01 6.62E-01 1.95E+00 U WG W-13 271757006 2/1/2011 Ba- 140 -4.92E-01 1.34E+00 4.35E+00 U WG W-13 271757006 2/1/2011 Be-7 -5.44E+00 6.07E+00 1.95E+01 U WG W-13 271757006 2/1/2011 Ce-141 -4.61E+00 2.15E+00 4.37E+00 U WG W-13 271757006 2/1/2011 Ce- 144 5.84E+00 5.27E+00 1.65E+01 U WG W-13 271757006 2/1/2011 Co-57 8.73E-01 6.84E-01 2.1413+00 U WG W-13 271757006 2/1/2011 Co-58 4.19E-01 7.13E-01 2.34E+00 U WG W-13 271757006 2/1/2011 Co-60 6.62E-01 8.04E-01 2.67E+00 U WG W-13 271757006 2/1/2011 Cr-51 -2.97E+00 7.02E+00 2.26E+01 U WG W-13 271757006 2/1/2011 Cs-134 -5.51E-01 8.59E-01 2.68E+00 U WG W-13 271757006 2/1/2011 Cs-137 1.75E+00 7.72E-01 2.36E+00 U D-150

IDonald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE *END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-13 271757006 2/1/2011 Fe-59 7.31E-01 1.48E+00 4.95E+00 U WG W-13 271757006 2/1/2011 H-3 3.17E+02 1.70E+02 4.96E+02 U WG W-13 271757006 2/1/2011 1-131 -1.35E+00 1.63E+00 5.07E+00 U WG W-13 271757006 2/1/2011 K-40 2.68E+01 9.96E+00 2.96E+01 U WG- W-13 271757006 2/1/2011 La-140 -4.92E-01 1.34E+00 4.35E+00 U WG W-13 271757006 2/1/2011 Mn-54 -1.80E+00 8.01E-01 1.95E+00 U WG W-13 271757006 2/1/2011 Nb-95 5.92E-01 7.35E-01 2.42E+00 U WG W-13 271757006 2/1/2011 Ru-103 -2.60E+00 9.76E-01 2.27E+00 U WG W-13 271757006 2/1/2011 Ru-106 -7.05E+00 6.53E+00 2.01E+01 U WG W-13 271757006 2/1/2011 Sb-124 -5.05E-01 1.81E+00 5.91 E+00 U WG W-13 271757006 2/1/2011 Sb-125 5.44E-01 1.83E+00 5.91 E+00 U WG W-13 271757006 2/1/2011 Se-75 -1.36E+00 9.77E-01 2.96E+00 U WG W-13 271757006 2/1/2011 Th-228 -2.18E+00 2.59E+00 6.92E+00 U WG W-13 271757006 2/1/2011 Zn-65 -7.77E-01 1.57E+00 5.06E+00 U WG W-13 271757006 2/1/2011 Zr-95 -2.16E+00 1.31E+00 3.62E+00 U WG W-14 271757007 2/1/2011 Ac-228 -4.61E+00 4.63E+00 9.96E+00 U WG W-14 271757007 2/1/2011 Ag-108m 1.04E+00 6.29E-01 2.01E+00 U WG W-14 271757007 2/1/2011 Ag- I 10m -1.84E+00 8.18E-01 2.02E+00 U WG W-14 271757007 2/1/2011 Ba-140 -2.27E+00 1.73E+00 4.98E+00 U WG W-14 271757007 2/1/2011 Be-7 2.84E+00 6.13E+00 2.03E+01 U WG W-14 271757007 2/1/2011 Ce- 141 -5.71E-01 1.05E+00 3.41E+00 U WG W-14 271757007 2/1/2011 Ce- 144 -5.36E+00 3.70E+00 1.12E+01 U WG W-14 271757007 2/1/2011 Co-57 -4.26E-01 4.29E-01 1.37E+00 U WG W-14 271757007 2/1/2011 Co-58 -2.02E-01 7.15E-01 2.36E+00 U WG W-14 271757007 2/1/2011 Co-60 -3.96E-01 6.94E-01 2.23E+00 U WG W-14 271757007 2/1/2011 Cr-51 3.23E+00 6.50E+00 2.21E+01 U WG W-14 271757007 2/1/2011 Cs-134 1.58E-01 8.38E-01 '2.82E+00 U WG W-14 271757007 2/1/2011 Cs-137 2.78E-01 7.53E-01 2.44E+00 U WG W-14 271757007 2/1/2011 Fe-59 -9.57E-01 1.67E+00 5.23E+00 U(

WG W-14 271757007 2/1/2011 H-3 6.5 1E+02 1.67E+02 4.21E+02 M WG W-14 271757007 2/1/2011 1-131 -1.53E+00 1.80E+00 5.78E+00 U WG W-14 271757007 2/1/2011 K-40 -1.16E+01 1.16E+01 2.89E+01 U WG W-14 271757007 2/1/2011 La-140 -2.27E+00 1.73E+00 4.98E+00 U WG W-14 271757007 2/1/2011 Mn-54 5.13E-01 6.82E-01 2.29E+00 U WG W-14 271757007 2/1/2011 Nb-95 1.23E+00 8.41E-01 2.77E+00 U WG W-14 271757007 2/1/2011 Ru-103 -2.71E+00 1.05E+00 2.46E+00 U WG W-14 271757007 2/1/2011 Ru-106 -3.8 1E+00 6.46E+00 2.02E+01 U WG W-14 271757007 2/1/2011 Sb-124 3.65E+00 2.I1 E+00 6.97E+00 U WG W-14 271757007 2/1/2011 Sb-125 -6.74E-01 1.70E+00 5.55E+00 U WG W-14 271757007 2/1/2011 Se-75 2.12E-01 7.98E-01 2.56E+00 U WG W-14 271757007 2/1/2011 Th-228 1.84E+00 2.07E+00 3.58E+00 U WG W-14 271757007 2/1/2011 Zn-65 -1.68E+00 1.78E+00 5.41E+00 U WG W-14 271757007 2/1/2011 Zr-95 -9.09E-01 1.34E+00 4.34E+06 U WG MW-20 271757008 2/1/2011 Ac-228 -4.42E+00 3.37E+00 8.03E+00 U WG MW-20 271757008 2/1/2011 Ag-108m 1.79E-01 4.74E-01 1.60E+00 U WG MW-20 271757008 2/1/2011 Ag-1 10m -2.22E-01 5.27E-01 1.68E+00 U WG MW-20 271757008 2/1/2011 Ba- 140 -5.38E-01 1.01E+00 3.25E+00 U WG MW-20 271757008 2/1/2011 Be-7 7.68E-01 4.85E+00 1.62E+01 U WG MW-20 271757008 2/1/2011 Ce- 141 -2.64E+00 1.54E+00 3.35E+00 U WG MW-20 271757008 2/1/2011 Ce- 144 3.28E+00 3.53E+00 1.18E+01 U WG MW-20 271757008 2/1/2011 Co-57 -2.97E-02 4.46E-01 1.51E+00 U D-151

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG MW-20 271757008 2/1/2011 Co-58 -6.32E-02 5.56E-01 1.87E+00 WG MW-20 271757008 2/1/2011 Co-60 -2.37E-02 5.88E-01 1.90E+00 WG MW-20 271757008 2/1/2011 Cr-51 -8.47E+00 5.95E+00 1.71E+01 WG MW-20 271757008 2/1/2011 Cs-134 -1.86E-01 6.55E-01 2.07E+00 WG MW-20 271757008 2/1/2011 Cs-137 4.48E-01 5.70E-01 1.87E+00 WG MW-20 271757008 2/1/2011 Fe-59 4.71E-03 1.16E+00 3.83E+00 WG MW-20 271757008 2/1/2011 H-3 3.82E+02 1.74E+02 4.96E+02 WG MW-20 271757008 2/1/2011 1-131 -9.96E-01 1.25E+00 4.08E+00 WG MW-20 271757008 2/1/2011 K-40 -6.27E+00 1.12E+01 2.38E+01 WG MW-20 271757008 2/1/2011 La-140 -5.38E-01 1.01E+00 3.25E+00 WG MW-20 271757008 2/1/2011 Mn-54 -6.66E-01 5.29E-01 1.62E+00 WG MW-20 271757008 2/1/2011 Nb-95 6.73E-01 6.05E-01 1.96E+00 WG MW-20 271757008 2/1/2011 Ru-103 6.21E-01 6.30E-01 2.09E+00 WG MW-20 271757008 2/1/2011 Ru-106 1.14E+01 5.68E+00 1.76E+01 WG MW-20 271757008 2/1/2011 Sb-124 -1.71E-01 1.21E+00 3.98E+00 WG MW-20 271757008 2/1/201 1 Sb-125 -2.54E-01 1.41E+00 4.69E+00 WG MW-20 271757008 2/1/2011 Se-75 1.66E-01 7.03E-01 2.28E+00 WG MW-20 271757008 2/1/2011 Th-228 1.61E-01 1.72E+00 4.03E+00 WG MW-20 271757008 2/1/2011 Zn-65 -3.41E-01 1.25E+00 4.05E+00 WG MW-20 271757008 2/1/2011 Zr-95 -1.38E+00 1.08E+00 3.12E+00 WG MW-21 271757009 2/1/2011 Ac-228 -3.04E-01 3.21E+00 7.87E+00 WG MW-21 271757009 2/1/2011 Ag-108m -3.14E-01 4.86E-01 1.54E+00 WG MW-21 271757009 2/1/2011 Ag-110m -3.54E-02 5.01E-01 1.68E+00 WG MW-21 271757009 2/1/2011 Ba-140 7.46E-02 1.12E+00 3.72E+00 WG MW-21 271757009 2/1/2011 Be-7 -4.46E+00 5.12E+00 1.59E+01 WG MW-21 271757009 2/1/2011 Ce- 141 -2.62E+00 1.23E+00 3.28E+00 WG MW-21 271757009 2/1/2011 Ce- 144 -8.79E+00 4.44E+00 1.20E+01 WG MW-21 271757009 2/I/201*1 Co-57 -2.52E-01 5.10E-01 1.62E+00 WG MW-21 271757009 2/1/2011 Co-58 -5.07E-01 5.88E-01 1.74E+00 WG MW-21 271757009 2/1/2011 Co-60 -5.55E-01 5.60E-01 1.74E+00 WG MW-21 271757009 2/1/2011 Cr-51 3.79E+00 5.52E+00 1.83E+01 WG MW-21 271757009 2/1/2011 Cs-134 5.28E-01 7.36E-01 2.17E+00 WG MW-21 271757009 2/1/2011 Cs-137 -2.25E-02 5.39E-01 1.81E+00 WG MW-21 271757009 2/1/2011 Fe-59 -1.09E+00 1.17E+00 3.56E+00 WG MW-21 271757009 2/1/2011 H-3 6.49E+01 1.56E+02 5.OOE+02 WG MW-21 271757009 2/1/2011 1-131 2.24E+00 1.35E+00 4.26E+00 WG MW-21 271757009 2/1/2011 K-40 8.51E+00 1.38E+01 1.72E+01 WG MW-21 271757009 2/1/2011 La-140 7.46E-02 1.12E+00 3.72E+00 WG MW-21 271757009 2/1/2011 Mn-54 -9.35E-01 5.70E-01 1.63E+00 WG MW-21 271757009 2/1/2011 Nb-95 8.05E-01 5.80E-01 1.91E+00 WG MW-21 271757009 2/1/2011 Ru- 103 -7.48E-01 6.67E-01 2.01E+00 WG MW-21 271757009 2/1/2011 Ru-106 -2.59E+00 4.78E+00 1.58E+01 WG MW-21 271757009 2/1/2011 Sb-124 -8.15E-01 1.34E+00 4.22E+00 WG MW-21 271757009 2/1/2011 Sb-125 1.90E+00 1.50E+00 4.85E+00 WG MW-21 271757009 2/1/2011 Se-75 -3.01E-01 7.13E-01 2.35E+00 WG MW-21 271757009 2/1/2011 Th-228 1.20E-01 1.67E+00 3.78E+00 WG MW-21 271757009 2/1/2011 Zn-65 1.02E+00 1.21E+00 3.5 1E+00 WG MW-21 271757009 2/1/2011 Zr-95 -2.42E-01 9.54E-01 3.15E+00 WG SG-2 271757010 2/1/2011 Ac-228 6.91E+00 2.87E+00 8.30E+00 WG SG-2 271757010 2/1/2011 Ag-108m 1.98E-01 5.37E-01 1.73E+00 WG SG-2 271757010 2/1/2011 Ag-110m -3.54E-01 5.44E-01 1.75E+00 D-152

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-2 271757010 2/1/2011 ALPHA 8.13E-01 1.67E+00 5.3 1E+00 DL WG SG-2 271757010 2/1/2011 Ba- 140 1.69E+00 1.28E+00 4.20E+00 WG SG-2 271757010 2/1/2011 Be-7 4.27E+00 5.21E+00 1.76E+01 WG SG-2 271757010 2/1/2011 BETA 3.94E+00 1.63E+00 4.93E+00 DL WG SG-2 271757010 2/1/2011 Ce- 141 -1.91E+00 1.18E+00 3.60E+00 WG SG-2 271757010 2/1/2011 Ce- 144 -2.85E+00 4.34E+00 1.27E+01 WG SG-2 271757010 2/1/2011 Co-57 3.62E-01 5.20E-01 1.65E+00 WG SG-2 271757010 2/1/2011 Co-58 -1.18E+00 6.37E-01 0.74E+00 WG SG-2 271757010 2/1/2011 Co-60 6.02E-01 6.15E-01 2.06E+00 WG SG-2 271757010 2/1/2011 Cr-51 7.88E-01 5.91E+00 1.93E+01 WG SG-2 271757010 2/1/2011 Cs-134 1.04E+00 7.21E-01 2.33E+00 WG SG-2 271757010 2/1/2011 Cs-137 1.68E-01 5.92E-01 1.97E+00 WG SG-2 271757010 2/1/2011 Fe-59 -9.61E-01 1.26E+00 4.04E+00 WG SG-2 271757010 2/1/2011 H-3 1.68E+02 1.55E+02 4.79E+02 WG SG-2 271757010 2/1/2011 1-131 1.92E-01 1.35E+00 4.37E+00 WG SG-2 271757010 2/1/2011 K-40 1.19E+01 1.44E+01 1.81E+01 WG SG-2 271757010 2/1/2011 La-140 1.69E+00 1.28E+06 4.20E+00 WG SG-2 271757010 2/1/2011 Mn-54 -1.67E+00 7.lIE-01 1.76E+00 WG SG-2 271757010 2/1/2011 Nb-95 3.OOE-02 5.94E-01 1.95E+00 WG SG-2 271757010 2/1/2011 Ru-103 2.43E-01 6.58E-01 2.22E+00 WG SG-2 271757010 2/1/2011 Ru- 106 1.42E+00 5.23E+00 1.75E+01 WG SG-2 271757010 2/1/2011 Sb-124 1.97E+00 1.55E+00 5.10E+00 WG SG-2 271757010 2/1/2011 Sb-125 7.88E-01 1.57E+00 5.07E+00 WG SG-2 271757010 2/1/2011 Se-75 -6.26E-01 8.04E-01 2.57E+00 WG SG-2 271757010 2/1/2011 Th-228 1.30E+00 2.06E+00 4.47E+00 WG SG-2 271757010 2/1/2011 Zn-65 -3.48E+00 1.5 1E+00 3.87E+00 WG SG-2 271757010 2/1/2011 Zr-95 1.11E+00 1.09E+00 3.58E+00 WG W-3 271785001 2/4/2011 Ac-228 4.78E+00 2.48E+00 7.90E+00 WG W-3 271785001 2/4/2011 Ag-108m 1.09E+00 5.12E-01 1.59E+00 WG W-3 271785001 2/4/2011 Ag-110m 2.78E-01 5.10E-01 1.67E+00 WG W-3 271785001 2/4/2011 Ba-140 1.1 E+00 9.11E-01 3.09E+00 WG W-3 271785001 2/4/2011 Be-7 -1.81E+00 4.45E+00 1.45E+01 WG W-3 271785001 2/4/2011 Ce- 141 -6.45E-02 9.04E-01 3.01E+00 WG W-3 271785001 2/4/2011 Ce- 144 -3.08E+00 3.67E+00 1.18E+01 WG W-3 271785001 2/4/2011 Co-57 -2.30E-01 4.65E-01 1.54E+00 WG W-3 271785001 2/4/2011 Co-58 -5.66E-01 5.47E-01 1.72E+00 WG W-3 271785001 2/4/2011 Co-60 2.92E-01 5.84E-01 1.92E+00 WG W-3 271785001 2/4/2011 Cr-51 -6.65E+00 5.59E+00 1.65E+01 WG W-3 271785001 2/4/2011 Cs-134 1.08E+00 6.72E-01 2.23E+00 WG W-3 271785001 2/4/2011 Cs-137 -7.01E-01 6.04E-01 1.80E+00 WG W-3 271785001 2/4/2011 Fe-59 -3.1lE-01 1.15E+00 3.73E+00 WG W-3 271785001 2/4/2011 H-3 8.16E+01 1.69E+02 5.42E+02 WG W-3 271785001 2/4/2011 1-131 7.79E-01 8.55E-01 2.88E+00 WG W-3 271785001 2/4/2011 K-40 -2.81E+01 1.22E+01 2.37E+01 WG W-3 271785001 2/4/2011 La-140 1.11 E+00 9.1OE-01 3.09E+00 wG W-3 271785001 2/4/2011 Mn-54 1.65E-02 5.50E-01 1.85E+00 WG W-3 271785001 2/4/2011 Nb-95 3.12E-01 5.92E-01 1.92E+00 WG W-3 271785001 2/4/2011 Ru-103 -1.81E+00 7.24E-01 1.74E+00 WG W-3 271785001 2/4/2011 Ru-106 3.43E+00 5.1OE+00 1.68E+01 WG W-3 271785001 2/4/2011 Sb-124 2.34E-01 1.40E+00 4.69E+00 WG W-3 271785001 2/4/2011 Sb-125 1.16E+00 1.47E+00 4.92E+00 D-153

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-3 271785001 2/4/2011 Se-75 9.30E-01 7.75E-01 2.46E+00 U WG W-3 271785001 2/4/2011 Th-228 1.88E+00 1.98E+00 3.38E+00 U WG W-3 271785001 2/4/2011 Zn-65 -7.07E-01 1. 19E+00 3.75E+00 U WG W-3 271785001 2/4/2011 Zr-95 -1.84E+00 1.08E+00 2.93E+00 U WG W-8 271785002 2/4/2011 Ac-228 3.74E+00 4.06E+00 7.13E+00 U WG W-8 271785002 2/4/2011 Ag-108m -4.63E-01 4.91E-01 1.52E+00 U WG W-8 271785002 2/4/2011 Ag-110m 1.73E-02 5.14E-01 1.73E+00 U WG W-8 271785002 2/4/2011 Ba- 140 8.23E-01 8.77E-01 2.96E+00 U WG W-8 271785002 2/4/2011 Be-7 6.32E+00 4.94E+00 1.58E+01 U WG W-8 271785002 2/4/2011 Ce-I141 -1.75E+00 1.09E+00 3.13E+00 U WG W-8 271785002 2/4/2011 Ce-I144 2.08E+00 3.89E+00 1.25E+01 U WG W-8 271785002 2/4/2011 Co-57 8.99E-01 5.47E-01 1.67E+00 U WG W-8 271785002 2/4/2011 Co-58 -2.19E-01 5.51E-01 1.80E+00 U WG W-8 271785002 2/4/2011 Co-60 2.57E-01 5.05E-01 1.72E+00 U WG W-8 271785002 2/4/2011 Cr-51 -5.85E+00 5.24E+00 1.64E+01 U WG W-8 271785002 2/4/2011 Cs-134 6.59E-01 6.85E-01 2.29E+00 U WG W-8 271785002 2/4/2011 Cs-137 -5.30E-01 5.72E-01 1.83E+00 U.

WG W-8 271785002 2/4/2011 Fe-59 -7.78E-01 1.07E+00 3.3 1E+00 U WG W-8 271785002 2/4/2011 H-3 2.09E+02 1.76E+02 5.42E+02 U WG W-8 271785002 2/4/2011 1-131 -5.83E-01 8.63E-01 2.76E+00 U WG W-8 271785002 2/4/2011 K-40 4.04E+01 1.36E+01 1.92E+01 WG W-8 271785002 2/4/2011 La-140 8.23E-01 8.76E-01 2.96E+00 U WG W-8 271785002 2/4/2011 Mn-54 -1.57E+00 6.68E-01 1.67E+00 U WG W-8 271785002 2/4/2011 Nb-95 4.78E-01 5.72E-01 1.92E+00 U WG W-8 271785002 2/4/2011 Ru-103 -6.16E-01 5.97E-01 1.82E+00 U WG W-8 271785002 2/4/2011 Ru-106 2.15E+00 4.72E+00 1.60E+01 U WG W-8 271785002 2/4/2011 Sb-124 -2.08E+00 1.30E+00 3.58E+00 U WG W-8 271785002 2/4/2011 Sb-125 2.79E-01 1.43E+00 4.69E+00 U WG W-8 271785002 2/4/2011 Se-75 -4.47E-01 7.26E-01 2.38E+00 U WG W-8 271785002 2/4/2011 Th-228 1.1OE+00 1.68E+00 3.75E+00 U WG W-8 271785002 2/4/2011 Zn-65 4.23E-01 1.30E+00 3.69E+00 U WG W-8 271785002 2/4/2011 Zr-95 -1.3]E+00 1.02E+00 3.11E+00 U WG SG-1 271785003 2/4/2011 Ac-228 1.36E+00 3.45E+00 9.19E+00 U WG SG-1 271785003 2/4/2011 Ag-108m 6.89E-01 5.69E-01 1.89E+00 U WG SG-1 271785003 2/4/2011 Ag-I 10m 3.89E-01 5.68E-01 1.89E+00 U WG SG-I 271785003 2/4/2011 ALPHA 1.97E+00 1.25E+00 2.18E+00 U WG SG-I 271785003 2/4/2011 Ba-140 7.81E-01 9.35E-01 3.13E+00 U WG SG-1 271785003 2/4/2011 Be-7 9.15E-01 5.35E+00 1.79E+01 U WG SG-I 271785003 2/4/2011 BETA 1.15E+00 1.01E+00 2.93E+00 U WG SG-1 271785003 2/4/2011 Ce-141 -3.I1E-01 1.08E+00 3.42E+00 U WG SG-1 271785003 2/4/2011 Ce-144 2.36E-01 4.19E+00 1.35E+01 U WG SG-1 271785003 2/4/2011 Co-57 -1.49E-01 5.16E-01 1.71E+00 U WG SG-1 271785003 2/4/2011 Co-58 -4.20E-01 6.34E-01 1.99E+00 U WG SG-1 271785003 2/4/2011 Co-60 -1.40E-01 6.18E-01 2.02E+00 U WG SG-1 271785003 2/4/2011 Cr-51 2.94E+00 5.46E+00 1.76E+01 U WG SG-1 271785003 2/4/2011 Cs-134 2.35E-01 7.33E-01 2.41E+00 U WG SG-1 271785003 2/4/2011 Cs-137 -8.37E-01 6.56E-01 1.97E+00 U WG SG-1 271785003 2/4/2011 Fe-59 -1.42E+00 1.23E+00 3.77E+00 U WG SG-1 271785003 2/4/2011 H-3 -1.28E+02 1.60E+02 5.47E+02 U WG SG-I 271785003 2/4/2011 1-131 1.73E+00 1.07E+00 3.29E+00 U WG SG-I 271785003 2/4/2011 K-40 3.99E+00 1.09E+01 2.83E+01 U D-154

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-I 271785003 2/4/2011 La-140 7.81E-01 9.35E-01 3.13E+00 WG SG-I 271785003 2/4/2011 Mn-54 -7.45E-01 6.54E-01 1.96E+00 WG SG-1 271785003 2/4/2011 Nb-95 -4.96E-01 6.63E-01 2.08E+00 WG SG-1 271785003 2/4/2011 Ru-103 -7.OOE-01 6.48E-01 2.03E+00 WG SG-1 271785003 2/4/2011 Ru-106 5.65E+00 5.47E+00 1.81E+01 WG SG-I 271785003 2/4/2011 Sb-124 -1.76E-01 1.53E+00 4.96E+00 WG SG-l 271785003 2/4/2011 Sb-125 -1.40E+00 1.72E+00 5.56E+00 WG SG-1 271785003 2/4/2011 Se-75 2.18E-01 8.34E-01 2.71E+00 WG SG-I 271785003 2/4/2011 Th-228 3.26E+00 2.01E+00 3.95E+00 WG SG-I 271785003 2/4/2011 Zn-65 -4.81E-01 1.49E+00 4.22E+00 WG SG-1 271785003 2/4/2011 Zr-95 -7.39E-02 1.07E+00 3.47E+00 WG SG-4 271785004 2/4/2011 Ac-228 6.60E+00 2.8 1E+00 8.20E+00 WG SG-4 271785004 2/4/2011 Ag-108m -9.47E-02 5.15E-01 1.64E+00 WG SG-4 271785004 2/4/2011 Ag-Il0m 7.02E-01 5.48E-01 1.80E+00 WG SG-4 271785004 2/4/2011 ALPHA 5.37E-01 1.11E+00 3.48E+00 WG SG-4 271785004 2/4/2011 Ba- 140 -1.01E+00 8.71E-01 2.56E+00 WG SG-4 271785004 2/4/2011 Be-7 2.45E+00 4.84E+00 1.64E+01 WG SG-4 271785004 2/4/2011 BETA 1.00E+01 1.28E+00 2.17E+00 WG SG-4 271785004 2/4/2011 Ce- 141 - 1.16E+00 1.01E+00 3.25E+00 WG SG-4 271785004 2/4/2011 Ce- 144 3.76E+00 4.17E+00 1.31E+01 WG SG-4 271785004 2/4/2011 Co-57 -3.65E-01 5.25E-01 1.63E+00 WG SG-4 271785004 2/4/2011 Co-58 -5.93E-01 5.70E-01 1.74E+00 WG SG-4 271785004 2/4/2011 Co-60 3.45E-01 6.09E-01 2.04E+00 WG SG-4 271785004 2/4/2011 Cr-51 1.99E+00 5.25E+00 1.72E+01 WG SG-4 271785004 2/4/2011 Cs-134 -8.89E-01 7.17E-01 2.15E+00 WG SG-4 271785004 2/4/2011 Cs-137 -1.45E+00 7.OOE-01 1.89E+00 WG SG-4 271785004 2/4/2011 Fe-59 -1.49E+00 1.18E+00 3.61E+00 WG SG-4 271785004 2/4/2011 H-3 -4.82E+01 1.63E+02 5.43E+02 WG SG-4 271785004 2/4/2011 1-131 4.07E-01 9.31E-01 3.03E+00 WG SG-4 271785004 2/4/2011 K-40 2.84E+01 1.45E+01 1.70E+01 WG SG-4 271785004 2/4/2011 La-140 -1.01E+00 8.70E-01 2.56E+00 WG SG-4 271785004 2/4/2011 Mn-54 -6.31E-01 5.88E-01 1.79E+00 WG SG-4 271785004 2/4/2011 Nb-95 1.48E+00 6.93E-01 2.10E+00 WG SG-4 271785004 2/4/2011 Ru-103 2.49E-01 5.85E-01 1.98E+00 WG SG-4 271785004 2/4/2011 Ru-106 -1.96E-01 5.15E+00 1.71E+01 WG SG-4 271785004 2/4/2011 Sb-124 1.02E+00 1.35E+00 4.48E+00 WG SG-4 271785004 2/4/2011 Sb-125 -1.46E+00 1.62E+00 4.98E+00 WG SG-4 271785004 2/4/2011 Se-75 -7.44E-01 7.93E-01 2.51E+00 WG SG-4 271785004 2/4/2011 Th-228 2.63E+00 1.66E+00 3.47E+00 WG SG-4 271785004 2/4/2011 Zn-65 -1.97E-01 1.35E+00 3.86E+00 WG SG-4 271785004 2/4/2011 Zr-95 -1.99E+00 1.15E+00 3.26E+00 WG SG-5 271785005 2/4/2011 Ac-228 -4.79E+00 4.34E+00 9.60E+00 WG SG-5 271785005 2/4/2011 Ag-108m -6.05E-01 6.58E-01 2.07E+00 WG SG-5 271785005 2/4/2011 Ag-110m -2.43E-01 6.28E-01 2.08E+00 WG SG-5 271785005 2/4/2011 ALPHA 1.89E+00 1.45E+00 3.13E+00 WG SG-5 271785005 2/4/2011 Ba- 140 7.98E-01 1.07E+00 3.62E+00 WG SG-5 271785005 2/4/2011 Be-7 -5.04E+00 6.17E+00 1.94E+01 WG SG-5 271785005 2/4/2011 BETA 4.44E+01 4.28E+00 2.69E+00 WG SG-5 271785005 2/4/2011 Ce- 141 8.72E-01 1.64E+00 *4.63E+00 WG SG-5 271785005 2/4/2011 Ce-144 -3.58E+00 5.57E+00 1.77E+01 WG SG-5 271785005 2/4/2011 Co-57 9.76E-01 7.45E-01 2.34E+00 D-155

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-5 271785005 2/4/2011 Co-58 -4.67E-01 6.81E-01 2.20E+00 U WG SG-5 271785005 2/4/2011 Co-60 2.5 1E-0I 6.72E-01 2.20E+00 U WG SG-5 271785005 2/4/2011 Cr-51 4.76E+00 6.78E+00 2.25E+01 U WG SG-5 271785005 2/4/2011 Cs-134 8.81E-01 8.19E-01 2.72E+00 U WG SG-5 271785005 2/4/2011 Cs-137 -1.69E-01 6.99E-01 2.33E+00 U WG SG-5 271785005 2/4/2011 Fe-59 -1.44E-01 1.26E+00 4.12E+00 U WG SG-5 271785005 2/4/2011 H-3 1.61E+02 1.73E+02 5.41E+02 U WG SG-5 271785005 2/4/2011 1-131 -4.07E-02. 1.16E+00 3.85E+00 U WG SG-5 271785005 2/4/2011 K-40 7.44E+01 1.53E+01 1.98E+01 WG SG-5 271785005 2/4/2011 La-140 7.98E-01 1.07E+00 3.62E+00 WG SG-5 271785005 2/4/2011 Mn-54 7.04E-01 6.69E-01 2.22E+00 WG SG-5 271785005 2/4/2011 Nb-95 5.29E-01 7.96E-01 2.32E+00 WG SG-5 271785005 2/4/2011 Ru-103 -1.27E+00 7.84E-01 2.26E+00 WG SG-5 271785005 2/4/2011 Ru-106 -4.06E+00 6.28E+00 1.97E+01 WG SG-5 271785005 2/4/2011 Sb- 124 4.75E-01 1.45E+00 4.88E+00 WG SG-5 271785005 2/4/2011 Sb-125 4.OOE-01 1.93E+00 6.36E+00 WG SG-5 271785005 2/4/2011 Se-75 4.16E-02 1.02E+00 3.41E+00 WG SG-5 271785005 2/4/2011 Th-228 4.OOE+00 2.27E+00 5.55E+00 WG SG-5 271785005 2/4/2011 Zn-65 -4.93E-01 1.54E+00 4.23E+00 WG SG-5 271785005 2/4/2011 Zr-95 -4.42E-01 1.17E+00 3.85E+00 WG W-1 271987001 2/7/2011 Ac-228 9.06E+00 3.30E+00 9.34E+00 WG W-1 271987001 2/7/2011 Ag-108m 5.88E-01 6.08E-01 2.01E+00 WG W-1 271987001 2/7/2011 Ag-110m 1.22E-02 6.10E-01 1.99E+00 WG W-1 271987001 2/7/2011 Ba- 140 3.75E-01 1.16E+00 3.85E+00 WG W-1 271987001 2/7/2011 Be-7 -6.59E-01 5.74E+00 1.89E+01 WG W-1 271987001 2/7/2011 Ce- 141 5.04E-01 1.28E+00 3.86E+00 WG W-1 271987001 2/7/2011 Ce- 144 1.47E+00 4.39E+00 1.43E+01 WG W-1 271987001 2/7/2011 Co-57 2.22E-01 5.82E-01 1.90E+00 WG W-1 271987001 2/7/2011 Co-58 -3.23E-01 6.86E-01 2.16E+00 WG W-1 271987001 2/7/2011 Co-60 3.66E-01 6.74E-01 2.26E+00 WG W-1 271987001 2/7/2011 Cr-51 -1.00E+01. 6.96E+00 2.13E+01 WG W-1 271987001 2/7/2011 Cs-134 -5.11E-02 7.71E-01 2.48E+00 WG W-1 271987001 2/7/2011 Cs-137 2.02E-02 6.34E-01 2.07E+00 WG W-1 271987001 2/7/2011 Fe-59 3.24E-01 1.36E+00 4.57E+00 WG W-1 271987001 2/7/2011 H-3 1.93E+02 1.38E+02 4.24E+02 WG W-1 271987001 2/7/2011 1-131 -2.91E+00 1.57E+00 4.49E+00 WG W-1 271987001 2/7/2011 K-40 1.60E+01 1.28E+01 3.25E+01 WG W-1 271987001 2/7/2011 La-140 3.75E-01 1.16E+00 3.85E+00 WG W-1 271987001 2/7/2011 Mn-54 7.69E-01 6.72E-01 2.18E+00 WG W-1 271987001 2/7/2011 Nb-95 - 1.17E+00 7.46E-01 2.11E+00 WG W-1 271987001 2/7/2011 Ru-I103 -8.50E-01 7.40E-01 2.27E+00 WG W-1 271987001 2/7/2011 Ru-106 -8.52E-01 5.96E+00 1.94E+01 WG W-1 271987001 2/7/2011 Sb-124 i.49E+00 1.65E+00 5.5 1E+00 WG W-1 271987001 2/7/2011 Sb-125 -5.3 1E+00 2.12E+00 5.24E+00 WG W-1 271987001 2/7/2011 Se-75 -8.26E-01 8.90E-01 2.88E+00 WG W-1 271987001 2/7/2011 Th-228 -5.42E+00 2.18E+00 4.25E+00 WG W-1 271987001 2/7/2011 Zn-65 -2.04E+00 1.51E+00 4.53E+00 WG W-1 271987001 2/7/2011 Zr-95 -1.03E+00 1.22E+00 3.76E+00 WG W-4 271987002 2/7/2011 Ac-228 2.81 E+00 2.77E+00 9.60E+00 WG W-4 271987002 2/7/2011 Ag-108m -3.42E-01 5.42E-01 1.77E+00 WG W-4 271987002 2/7/2011 Ag-1 10m -1.04E+00 6.38E-01 1.83E+00 D-156

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-4 271987002 2/7/2011 Ba- 140 -4.47E-01 1.18 E+00 3.77E+00 U WG W-4 271987002 2/7/2011 Be-7 -6.58E+00 5.56E+00 1.73E+01 U WG W-4 271987002 2/7/2011 Ce- 141 3.OOE-01 1.19E+00 3.67E+00 U WG W-4 271987002 2/7/2011 Ce- 144 3.58E+00 4.21E+00 1.34E+01 U WG W-4 271987002 2/7/2011 Co-57 5.86E-01 5.45E-01 1.79E+00 U WG W-4 271987002 2/7/2011 Co-58 5.90E-02 6.03E-01 1.97E+00 U WG W-4 271987002 2/7/2011 Co-60 -1.4 1E+00 7.28E-01 1.93E+00 U WG W-4 271987002 2/7/2011 Cr-51 -1.07E+01 6.92E+00 2.OOE+01 U WG W-4 271987002 2/7/2011 Cs-134 3.40E-01 7.86E-01 2.59E+00 U WG W-4 271987002 2/7/2011 Cs-137 7.25E-02 6.45E-01 2.13E+00 U WG W-4 271987002 2/7/2011 Fe-59 -2.48E-01 1.20E+00 3.98E+00 U WG W-4 271987002 2/7/2011 H-3 1.11E+03 2.02E+02 4.23E+02 M WG W-4 271987002 2/7/2011 1-131 -3.31E-01 1.39E+00 4.43E+00 U WG W-4 271987002 2/7/2011 K-40 4.76E+01 1.58E+01 2.05E+01 WG W-4 271987002 2/7/2011 Lh-140 -4.47E-01 1.18E+00 3.77E+00 U WG W-4 271987002 2/7/2011 Mn-54 -4.23E-01 6.04E-01 1.88E+00 U WG W-4 271987002 2/7/2011 Nb-95 9.09E-01 6.67E-01 2.17E+00 U WG W-4 271987002 2/7/2011 Ru-103 - 1.21E+00 7.23E-01 2.10E+00 U WG W-4 271987002 2/7/2011 Ru-106 -6.70E+00 5.92E+00 1.82E+01 U WG W-4 271987002 2/7/2011 Sb- 124 2.58E+00 1.71E+00 5.65E+00 U WG W-4 271987002 2/7/2011 Sb-125 -3.16E-01 1.58E+00 5.28E+00 U WG W-4 271987002 2/7/2011 Se-75 -6.28E-01 8.32E-01 2.61E+00 U WG W-4 271987002 2/7/2011 Th-228 3.79E+00 1.94E+00 4.03E+00 U WG W-4 271987002 2/7/2011 Zn-65 2.01E+00 1.42E+00 4.22E+00 U WG W-4 271987002 2/7/2011 Zr-95 9.09E-01 1.18E+00 3.90E+00 U WG W-5 271987003 2/7/2011 Ac-228 8.22E+00 3.32E+00 9.77E+00 U WG W-5 271987003 2/7/2011 Ag-108m 9.49E-01 5.86E-01 1.88E+00 U WG W-5 271987003 2/7/2011 Ag-110m -7.73E+00 1.98E+00 2.06E+00 U WG W-5 271987003 2/7/2011 Bdi-140 1.01E-02 1.35E+00 4.39E+00 U WG W-5 271987003 2/7/2011 Be-7 -3.58E+00 5.63E+00 1.80E+01 U WG W-5 271987003 2/7/2011 Ce- 141 -2.90E-01 1.13E+00 3.37E+00 U WG W-5 271987003 2/7/2011 Ce- 144 -1.24E+00 3.55E+00 1.18E+01 U WG W-5 271987003 2/7/2011 Co-57 4.13E-01 4.59E-01 1.54E+00 U WG W-5 271987003 2/7/2011 Co-58 1.92E+00 8.14E-01 2.47E+00 U WG ,W-5 271987003 2/7/2011 Co-60 -1.38E+00 7.32E-01 1.94E+00 U WG W-5 271987003 2/7/2011 Cr-51 -3.60E+00 5.70E+00 1.89E+01 U WG W-5 271987003 2/7/2011 Cs-134 6.71E-01 8.43E-01 2.83E+00 U WG W-5 271987003 2/7/2011 Cs-137 -2.45E+00 1.53E+00 3.78E+00 U WG W-5 271987003 2/7/2011 Fe-59 9.82E-01 1.57E+00 5.13E+00 U WG W-5 271987003 2/7/2011 H-3 9.64E+02 1.91E+02 4.25E+02 M WG W-5 271987003 2/7/2011 .1-131 -9.08E-01 1.31E+00 4.25E+00 U WG W-5 271987003 2/7/2011 K-40 3.37E+01 1.55E+01 1.95E+01 UI WG W-5 271987003 2/7/2011 La-140 1.01E-02 1.35E+00 4.39E+00 U WG W-5 271987003 2/7/2011 Mn-54 -1.00E-02 6.54E-01 2.17E+00 U WG W-5 271987003 2/7/2011 Nb-95 1.19E+00 7.16E-01 2.33E+00 U WG W-5 271987003 2/7/2011 Ru-103 -1.63E-01 7.13E-61 2.32E+00 U WG W-5 271987003 2/7/2011 Ru-106 1.35E+00 5.70E+00 1.84E+01 U.

WG W-5 271987003 2/7/2011 Sb-124 9.61E-01 1.67E+00 5.56E+00 U WG W-5 271987003 2/7/2011 Sb-125 -5.33E-01 1.64E+00 5.37E+00 U WG W-5 271987003 2/7/2011 Se-75 -7.39E-01 8.41E-01 2.58E+00 U WG W-5 271987003 2/7/2011 Th-228 2.42E+00 1.96E+00 3.44E+00 U D-157

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-5 271987003 2/7/2011 Zn-65 -5.97E+00 2.11E+00 4.24E+00 U WG W-5 271987003 2/7/2011 Zr-95 1.24E+00 1.26E+00 4.25E+00 U WG W-6 271987004 2/7/2011 Ac-228 4.54E+00 4.75E+00 9. 10E+00 U WG W-6 271987004 2/7/2011 Ag-108m -5.02E-01 6.OOE-01 1.89E+00 U WG W-6 271987004 2/7/2011 Ag-110m -4.63E-01 6.15E-01 1.99E+00 U WG W-6 271987004 2/7/2011 Ba-140 5.15E-01 1.16E+00 3.90E+00 U WG W-6 271987004 2/7/2011 Be-7 -7.08E+00 6.24E+00 1.90E+01 U WG W-6 271987004 2/7/2011 Ce-141 1.86E+00 1.53E+00 4.66E+00 U WG W-6 271987004 2/7/2011 Ce-144 -5.93E+00 5.33E+00 1.64E+01 U WG W-6 271987004 2/7/2011 Co-57 -1.43E+00 7.61E-01 2.16E+00 U WG W-6 271987004 2/7/2011 Co-58 -2.02E+00 7.85E-01 1.86E+00 U WG W-6 271987004 2/7/2011 Co-60 1.87E-01 6.35E-01 2.14E+00 U WG W-6 271987004 2/7/2011 Cr-51 -1.77E+00 7.24E+00 2.39E+01 U WG W-6 271987004 2/7/2011 Cs-134 7.63E-01 8.26E-01 2.75E+00 U WG W-6 271987004 2/7/2011 Cs-137 -6.92E-01 6.63E-01 2.09E+00 U WG W-6 271987004 2/7/2011 Fe-59 -3.27E+00 1.51E+00 3.80E+00 U WG W-6 271987004 2/7/2011 H-3 3.72E+02 1.48E+02 4.23E+02 U WG W-6 271987004 2/7/2011 1-131 1.86E-01 1.53E+00 5.04E+00 U WG W-6 271987004 2/7/2011 K-40 1.21E+01 1.35E+01 2.12E+01 U WG W-6 271987004 2/7/2011 La-140 5.15E-01 1.16E+00 3.90E+00 U WG W-6 271987004 2/7/2011 Mn-54 5.20E-01 6.04E-01 2.01E+00 U WG W-6 271987004 2/7/2011 Nb-95 1.85E+00 8.34E-01 2.53E+00 U WG W-6 271987004 2/7/2011 Ru-103 -5.63E-01 7.38E-01 2.3 1E+00 U WG W-6 271987004 2/7/2011 Ru-106 -4.77E+00 5.62E+00 1.81E+01 U WG W-6 271987004 2/7/2011 Sb-124 -3.21E+00 1.62E+00 4.14E+00 U WG W-6 271987004 2/7/2011 Sb-125 -8.23E-01 1.85E+00 5.97E+00 U WG W-6 271987004 2/7/2011 Se-75 -3.81E-01 9.71E-01 3.21E+00 U WG W-6 271987004 2/7/2011 Th-228 1.06E+00 2.33E+00 4.40E+00 U WG W-6 271987004 2/7/2011 Zn-65 1.10E+00 1.44E+00 4.12E+00 U WG W-6 271987004 2/7/2011 Zr-95 1.78E-01 1.15E+00 3.85E+00 U WG W-9 271987005 2/7/2011 Ac-228 7.81E+00 3.03E+00 8.87E+00 U WG W-9 271987005 2/7/2011 Ag-108m -5.81E-01 5.99E-01 1.82E+00 U WG W-9 271987005 2/7/2011 Ag-110m -8.38E-02 5.46E-01 1.78E+00 U WG W-9 271987005 2/7/2011 Ba-140 -8.19E-01 1.24E+00 3.95E+00 U WG W-9 271987005 2/7/2011 Be-7 -8.02E+00 5.82E+00 1.79E+01 U WG W-9 271987005 2/7/2011 Ce-141 -1.19E+00 1.74E+00 4.22E+00 U WG W-9 271987005 2/7/2011 Ce-144 -3.11E+00 4.59E+00 1.43E+01 U WG W-9 271987005 2/7/2011 Co-57 -8.36E-01 6.22E-01 1.85E+00 U WG W-9 271987005 2/7/2011 Co-58 -3.68E-01 6.34E-01 1.99E+00 U WG W-9 271987005 2/7/2011 Co-60 -3.12E-02 7.33E-01 2.38E+00 U WG W-9 271987005 2/7/2011 Cr-51 1.41E+01 7.14E+00 2.17E+01 U WG W-9 271987005 2/7/2011 Cs-134 -3.46E-01 7.56E-01 2.40E+00 U WG W-9 271987005 2/7/2011 Cs-137 1.03E+00 6.89E-01 2.22E+00 U WG W-9 271987005 2/7/2011 Fe-59 2.34E-01 1.39E+00 4.62E+00 U WG W-9 271987005 2/7/2011 H-3 9.12E+01 1.33E+02 4.22E+02 U WG W-9 271987005 2/7/2011 1-131 -3.90E-01 1.51E+00 4.85E+00 U WG W-9 271987005 2/7/2011 K-40 8.44E+01 1.40E+01 2.26E+01 WG W-9 271987005 2/7/2011 La-140 -8.19E-01 1.24E+00 3.95E+00 U WG W-9 271987005 2/7/2011 Mn-54 5.97E-01 6.46E-01 2. 1OE+00 U WG W-9 271987005 2/7/2011 Nb-95 3.69E-01 6.57E-01 2.16E+00 U WG W-9 271987005 2/7/2011 Ru-103 1.18E-02 6.86E-01 2.30E+00 U D-158

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-9 271987005 2/7/2011 Ru-106 -7.41E+00 5.73E+00 1.73E+01 U WG W-9 271987005 2/7/2011 Sb-124 -1.93E+00 1.67E+00 4.98E+00 U WG W-9 271987005 2/7/2011 Sb-125 5.78E-01 1.71E+00 5.51E+00 U WG W-9 271987005 2/7/2011 Se-75 4.03E-01 8.73E-01 2.89E+00 U WG W-9 271987005 2/7/2011 Th-228 5.14E-01 2.72E+00 6.13E+00. U WG W-9 271987005 2/7/2011 Zn-65 -2.85E+00 1.58E+00 4.38E+00 U WG W-9 271987005 2/7/2011 Zr-95 -2.41E-01 1.11E+00 3.57E+00 U WG W-15 271987006 2/7/2011 Ac-228 -7.10E+00 4.07E+00 7.64E+00 U WG W-15 271987006 2/7/2011 Ag-108m -2.39E-01 5.45E-01 1.72E+00 U WG W-15 271987006 2/7/2011 Ag-Il0m -4.60E-01 5.58E-01 1.76E+00 U WG W-15 271987006 2/7/2011 Ba-140 1.08E+00 1.27E+00 4.18E+00 U WG W-15 271987006 2/7/2011 Be-7 -9.48E-01 5.17E+00 1.74E+01 U WG W-15 271987006 2/7/2011 Ce-141 7.59E-01 1.23E+00 4.03E+00 U WG W-15 271987006 2/7/2011 Ce-144 2.61E+00 4.46E+00 1.41E+01 U WG W-15 271987006 2/7/2011 Co-57 -8.30E-01 6.07E-01 1.79E+00 U WG W-15 271987006 2/7/2011 Co-58 1.04E+00 6.29E-01 2.OOE+00 U WG W-15 271987006 2/7/2011 Co-60 -4.06E-01 6.51E-01 2.06E+00 U WG W-15 271987006 2/7/2011 Cr-51 3.85E+00 6.21E+00 2.03E+01 U WG W-15 271987006 2/7/2011 Cs-134 1.08E+00 7.55E-01 2.43E+00 U WG W-15 271987006 2/7/2011 Cs-137 5.56E-01 6.12E-01 2.03E+00 U WG W-15 271987006 2/7/2011 Fe-59 -1.05E+00 1.22E+00 3.85E+00 U WG W-15 271987006 2/7/2011 H-3 5.07E+02 1.57E+02 4.23E+02 M WG W-15 271987006 2/7/2011 1-131 -2.65E-01 1.50E+00 4.83E+00 U WG W-15 271987006 2/7/2011 K-40 3.13E+01 1.01E+01 2.64E+01 UI WG W-15 271987006 2/7/2011 La-140 1.08E+00 1.27E+00 4.18E+00 U WG W-15 271987006 2/7/2011 Mn-54 -2.34E-01 5.85E-01 1.87E+00 U WG W-15 271987006 2/7/2011 Nb-95 8.42E-01 6.38E-01 2.07E+00 U WG W-15 271987006 2/7/2011 Ru-103 -1.07E+00 7.08E-01 2.13E+00 U WG W-15 271987006 2/7/2011 Ru-106 -2.32E+00 5.16E+00 1.68E+01 U WG W-15 271987006 2/7/2011 Sb-124 -8.02E-01 1.53E+00 4.96E+00 U WG W-15 271987006 2/7/2011 Sb-125 -1.84E+00 1.72E+00 5.20E+00 U WG W-15 271987006 2/7/2011 Se-75 1.22E-01 8.24E-01 2.73E+00 U WG W-15 271987006 2/7/2011 Th-228 -1.51E-01 1.51E+00 4.15E+00 U WG W-15 271987006 2/7/2011 Zn-65 -2.25E+00 1.42E+00 4.13E+00 U WG W-15 271987006 2/7/2011 Zr-95 -8.89E-02 1.08E+00 3.51E+00 U WG W-1 277638001 5/4/2011 Ac-228 1.16E+01 3.82E+00 6.95E+00 UI WG W-1 277638001 5/4/2011 Ag-108m -4.39E-01 4.22E-01 1.35E+00 U WG W-1 277638001 5/4/2011 Ag-lI0m -2.79E-01 4.57E-01 1.46E+00 U WG W-1 277638001 5/4/2011 Ba-140 -2.12E+00 1.86E+00 5.72E+00 U WG W-1 277638001 5/4/2011 Be-7 8.50E+00 5.34E+00 1.70E+01 U WG W-1 277638001 5/4/2011 Ce-141 1.53E+00 1.25E+00 3.92E+00 U WG W-1 277638001 5/4/2011 Ce-144 -5.50E-01 3.26E+00 1.05E+01 U WG W-1 277638001 5/4/2011 Co-57 1.27E-01 4.11E-01 1.38E+00 U WG W-1 277638001 5/4/2011 Co-58 3.34E-03 5.35E-01 1.72E+00 U WG W-1 277638001 5/4/2011 Co-60 8.21E-01 5.34E-01 1.71E+00 U WG W-1 277638001 5/4/2011 Cr-51 5.65E+00 6.63E+00 2.12E+01 U WG W-1 277638001 5/4/2011 Cs-134 6.75E-01 5.86E-01 1.88E+00 U WG W-1 277638001 5/4/2011 Cs-137 2.73E-01 4.72E-01 1.55E+00 U WG W-1 277638001 5/4/2011 Fe-59 1.1OE+00 1.24E+00 4.11E+00 U WG W-1 277638001 5/4/2011 H-3 5.04E+01 1.54E+02 4.97E+02 U WG W-1 277638001 5/4/2011 1-131 -1.72E-01 3.35E+00 1.13E+01 U D-159

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-1 277638001 5/4/2011 K-40 7.74E-01 1.05E+01 1.49E+01 U WG W-1 277638001 5/4/2011 La-140 -2.12E+00 1.85E+00 5.72E+00 U WG W-1 277638001 5/4/2011 Mn-54 -5.63E-01 4.77E-01 1.50E+00 U WG W-1 277638001 5/4/2011 Nb-95 3.78E-01 5.88E-01 1.91E+00 U WG W-1 277638001 5/4/2011 Ru-103 -1.25E+00 7.28E-01 2.13E+00 U WG W-1 277638001 5/4/2011 Ru-106 -4.73E-01 4.40E+00 1.44E+01 U WG W-1 277638001 5/4/2011 Sb-124 -1.89E+00 1.38E+00 4.1OE+00 U WG W-1 277638001 5/4/2011 Sb-125 -1.36E-01 1.27E+00 4.25E+00 U WG W-1 277638001 5/4/2011 Se-75 -1.44E-01 6.82E-01 2.21E+00 U WG W-1 277638001 5/4/2011 Th-228 1.27E-01 1.71E+00 3.43E+00 U WG W-1 277638001 5/4/2011 Zn-65 6.78E-01 1.07E+00 3.09E+00 U WG W-1 277638001 5/4/2011 Zr-95 -4.38E-01 1.02E+00 3.26E+00 U WG W-2 277638002 5/3/2011 Ac-228 3.56E+00 6.17E+00 1.02E+01 U WG W-2 277638002 5/3/2011 Ag-108m -2.90E-01 5.44E-01 1.72E+00 U WG W-2 277638002 5/3/2011 Ag-1 10m -1.36E+00 7.38E-01 2.07E+00 U WG W-2 277638002 5/3/2011 Ba-140 -4.80E+00 2.96E+00 7.92E+00 U WG W-2 277638002 5/3/2011 Be-7 6.72E-01 6.54E+00 2.11E+01 U WG W-2 277638002 5/3/2011 Ce- 141 -3.89E-01 1.66E+00 4.68E+00 U WG W-2 277638002 5/3/2011 Ce- 144 -5.66E+00 4.1OE+00 1.21E+01 U WG W-2 277638002 5/3/2011 Co-57 3.92E-01 5.22E-01 1.67E+00 U WG W-2 277638002 5/3/2011 Co-58 4.87E-01 7.10E-01 2.36E+00 U WG W-2 277638002 5/3/2011 Co-60 1.54E+00 8.81E-01 2.57E+00 U WG W-2 277638002 5/3/2011 Cr-51 4.81E+00 8.86E+00 2.93E+01 U WG W-2 277638002 5/3/2011 Cs-134 7.72E-01 8.29E-01 2.74E+00 U WG W-2 277638002 5/3/2011 Cs-137 5.91E-01 6.95E-01 2.32E+00 U WG W-2 277638002 5/3/2011 Fe-59 3.87E+00 2.04E+00 6.60E+00 U WG W-2 277638002 5/3/2011 H-3 1.12E+02 1.46E+02 4.57E+02 U WG W-2 277638002 5/3/2011 1-131 -4.97E-01 4.81E+00 1.57E+01 U WG W-2 277638002 5/3/2011 K-40 4.42E+01 1.60E+01 2.28E+01 WG W-2 277638002 5/3/2011 La- 140 -4.80E+00 2.96E+00 7.92E+00 U WG W-2 277638002 5/3/2011 Mn-54 4.22E-01 6.33E-01 2.10E+00 U WG W-2 277638002 5/3/2011 Nb-95 6.11E-01 7.82E-01 2.60E+00 U WG W-2 277638002 5/3/2011 Ru-103 -1.68E-01 9.57E-01 3.05E+00 U WG W-2 277638002 5/3/2011 Ru-106 -1.22E+01 6.26E+00 1.73E+01 U WG W-2 277638002 5/3/2011 Sb-124 -3.37E+00 2.36E+00 6.57E+00 U WG W-2 277638002 5/3/2011 Sb-125 1.34E+00 1.73E+00 5.63E+00 U WG W-2 277638002 5/3/2011 Se-75 -4.82E-01 8.68E-01 2.84E+00 U WG W-2 277638002 5/3/2011 Th-228 1.32E-01 1.78E+00 4.38E+00 U WG W-2 277638002 5/3/2011 Zn-65 -1.25E+00 1.44E+00 4.55E+00 U WG W-2 277638002 5/3/2011 Zr-95 1.07E+00 1.36E+00 4.53E+00 U WG W-3 277638003 5/3/2011 Ac-228 -8.49E-01 3.92E+00 '7.83E+00 U WG W-3 277638003 5/3/2011 Ag-108m 1.73E-01 4.81E-01 1.57E+00 U WG W-3 277638003 5/3/2011 Ag-I 10m -5.69E-01 5.65E-01 1.78E+00 U WG W-3 277638003 5/3/2011 Ba-140 -3.24E+00 2.42E+00 7.24E+00 U WG W-3 277638003 5/3/2011 Be-7 -2.81E+00 6.03E+00 1.92E+01 U WG W-3 277638003 5/3/2011 Ce- 141 -3.71E-01 1.47E+00 4.28E+00 U WG W-3 277638003 5/3/2011 Ce- 144 -1.67E+00 3.61E+00 1.17E+01 U WG W-3 277638003 5/3/2011 Co-57 -1.95E-01 4.64E-01 1.52E+00 U WG W-3 277638003 5/3/2011 Co-58 -2.74E-01 6.58E-01 2.12E+00 U WG W-3 277638003 5/3/2011 Co-60 1.89E+00 7.43E-01 2.14E+00 U WG W-3 277638003 5/3/2011 Cr-51 6.36E+00 7.73E+00 2.56E+01 U D-160

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-3 277638003 5/3/2011 Cs-134 -6.25E-01 6.82E-01 2.12E+00 U WG W-3 277638003 5/3/2011 Cs-137 6.30E-01 5.85E-01 1.93E+00 U WG W-3 277638003 5/3/2011 Fe-59 4.26E+00 1.78E+00 5.30E+00 U WG W-3 277638003 5/3/2011 H-3 6.42E+01 1.48E+02 4.74E+02 U WG W-3 277638003 5/3/2011 1-131 -3.71E+00 4.26E+00 1.36E+01 U WG W-3 277638003 5/3/2011 K-40 3.18E+00 1.46E+01 1.75E+01 U WG W-3 277638003 5/3/2011 La-140 -3.24E+00 2.42E+00 7.24E+00 U WG W-3 277638003 5/3/2011 Mn-54 -6.44E-01 5.70E-01 1.73E+00 U WG W-3 277638003 5/3/2011 Nb-95 1.89E+00 8.15E-01 2.39E+00 U WG W-3 277638003 5/3/2011 Ru-103 -1.43E+00 8.72E-01 2.48E+00 U WG W-3 277638003 5/3/2011 Ru-106 -9.97E-01 4.92E+00 1.63E+01 U WG W-3 277638003 5/3/2011 Sb-124 -1.73E+00 1.70E+00 5.26E+00 U WG W-3 277638003 5/3/2011 Sb-125 1.36E+00 1.48E+00 4.81E+00 U WG W-3 277638003 5/3/2011 Se-75 8.80E-01 7.80E-01 2.58E+00 U WG W-3 277638003 5/3/2011 Th-228 3.30E+00 2.04E+00 3.53E+00 U WG W-3 277638003 5/3/2011 Zn-65 -2.35E+00 1.34E+00 3.84E+00 U WG W-3 277638003 5/3/2011 Zr-95 3.02E-01 1.18E+00 3.88E+00 U WG W-7 277638004 5/4/2011 Ac-228 3.79E+00 2.13E+00 6.70E+00 U WG W-7 277638004 5/4/2011 Ag-108m -6.85E-02 4.30E-01 1.39E+00 U WG W-7 277638004 5/4/2011 Ag-ll0m 7.58E-02 5.19E-0I 1.52E+00 U WG I W-7 277638004 5/4/2011 Ba-140 -4.06E+00 2.31E+00 6.24E+00 U WG W-7 277638004 5/4/2011 Be-7 2.15E+00 5.20E+00 1.69E+01 U WG W-7 277638004 5/4/2011 Ce-141 -7.07E-01 1.27E+00 4.03E+00 U WG W-7 277638004 5/4/2011 Ce-144 -3.31E-01 3.59E+00 1.16E+01 U WG W-7 277638004 5/4/2011 Co-57 1.65E-01 4.57E-01 1.49E+00 U WG W-7 277638004 5/4/2011 Co-58 -3.78E-01 5.75E-01 1.83E+00 U WG W-7 277638004 5/4/2011 Co-60 5;46E-01 5.50E-01 1.85E+00 U WG W-7 277638004 5/4/2011 Cr-51 -1.76E+00 7.01E+00 2.3 1E+01 U WG W-7 277638004 5/4/2011 Cs-134 5.34E-01 6.03E-01 2.OOE+00 U WG W-7 277638004 5/4/2011 Cs-137 6.48E-02 1.23E+00 1.64E+00 U WG W-7 277638004 5/4/2011 Fe-59 4.63E-01 1.29E+00 4.20E+00 U WG W-7 277638004 5/4/2011 H-3 2.77E+02 1.64E+02 4.86E+02 U WG W-7 277638004 5/4/2011 1-131 -5.64E-01 3.64E+00 1.19E+01 U WG W-7 277638004 5/4/2011 K-40 -1.90E+01 1.13E+01 2.23E+01 U WG W-7 277638004 5/4/2011 La-140 -4.06E+00 2.30E+00 6.24E+00 U WG W-7 277638004 5/4/2011 Mn-54 -9.29E-01 5.21E-01 1.46E+00 U WG W-7 277638004 5/4/2011 Nb-95 7.22E-01 5.81E-01 1.91E+00 U WG W-7 277638004 5/4/2011 Ru-103 -3.26E-01 7.58E-01 2.41E+00 U WG W-7 277638004 5/4/2011 Ru-106 -4.25E-01 4.39E+00 1.47E+01 U WG W-7 277638004 5/4/2011 Sb-124 1.05E+00 1.54E+00 5.12E+00 U WG W-7 277638004 5/4/2011 Sb-125 -8.71E-01 1.42E+00 4.51E+00 U WG W-7 277638004 5/4/2011 Se-75 -6.50E-01 7.58E-01 .2.46E+00 U WG W-7 277638004 5/4/2011 Th-228 -1.29E+00 1.62E+00 3.61E+00 U WG W-7 277638004 5/4/2011 Zn-65 -1.83E+00 1.21E+00 3.41E+00 U WG W-7 277638004 5/4/2011 Zr-95 -3.38E-01 9.90E-01 3.24E+00 U WG W-8 277638005 5/3/2011 Ac-228 1.01E+01 3.38E+00 8.49E+00 UI WG W-8 277638005 5/3/2011 Ag-108m 2.91E-01 4.88E-01 1.58E+00 U WG W-8 277638005 5/3/2011 Ag-I10m 2.95E-01 5.36E-01 1.79E+00 U WG W-8 .277638005 5/3/2011 Ba-140 -2.71E+00 2.44E+00 7.52E+00 U WG W-8 277638005 5/3/2011 Be-7 1.99E-01 6.22E+00 1.99E+01 U WG W-8 277638005 5/3/2011 Ce-141 -4.61E-01 1.49E+00 4.72E+00 U D-161

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-8 277638005 5/3/2011 Ce- 144 -9.67E-01 4.01E+00 1.28E+01 U WG W-8 277638005 5/3/2011 Co-57 -3.62E-01 5.26E-01 1.66E+00 U WG W-8 277638005 5/3/2011 Co-58 -3.84E-01 6.42E-01 2.03E+00 U WG W-8 277638005 5/3/2011 Co-60 -2.33E-01 6.21E-01 2.OOE+00 U WG W-8 277638005 5/3/2011 Cr-51 1.25E+00 8.19E+00 2.70E+01 U WG W-8 277638005 5/3/2011 Cs'-134 7.12E-01 6.54E-01 2.13E+00 U WG W-8 277638005 5/3/2011 Cs-137 -3.53E-01 5.57E-01 1.79E+00 U WG W-8 277638005 5/3/2011 Fe-59 1.07E+00 1.56E+00 5.22E+00 U WG W-8 277638005 5/3/2011 H-3 2.13E+02 1.61E+02 4.89E+02 U WG W-8 277638005 5/3/2011 1-131 2.36E+00 4.79E+00 1.57E+01 U WG W-8 277638005 5/3/2011 K-40 3.62E+01 1.42E+01 1.89E+01 WG W-8 277638005 5/3/2011 La-140 -2.71 E+00 2.44E+00 7.52E+00 U WG W-8 277638005 5/3/2011 Mn-54 1.35E-01 5.49E-01 1.79E+00 U WG W-8 277638005 5/3/2011 Nb-95 1.18E-02 6.46E-01 2.12E+00 U WG W-8 277638005 5/3/2011 Ru-I103 -1.38E+00 8.44E-01 2.52E+00 U WG W-8 277638005 5/3/2011 Ru-106 -1.55E+00 4.90E+00 1.61E+01 U WG W-8 277638005 5/3/2011 Sb-124 -1.69E-01 1.63E+00 5.40E+00 U WG W-8 277638005 5/3/2011 Sb-125 1.23E+00 1.57E+00 5.07E+00 U WG W-8 277638005 5/3/2011 Se-75 -4.97E-01 8.53E-01 2.79E+00 U WG W-8 277638005 5/3/2011 Th-228 -2.12E-01 2.10E+00 4.06E+00 U WG W-8 277638005 5/3/2011 Zn-65 -1.69E+00 1.27E+00 3.82E+00 U WG W-8 277638005 5/3/2011 Zr-95 -4.61E-01 1.16E+00 3.73E+00 U WG W-10 277638006 5/4/2011 Ac-228 -4.37E+00 3.23E+00 6.65E+00 U WG W-10 277638006 5/4/2011 Ag-108m -8.21E-01 4.77E-01 1.36E+00 U WG W-10 277638006 5/4/2011 Ag-il0m -3.80E-01 4.72E-01 1.51E+00 U WG W-10 277638006 5/4/2011 Ba- 140 2.57E+00 2.25E+00 7.35E+00 U WG W-10 277638006 5/4/2011 Be-7 1.13E+00 4.98E+00 1.61E+01 U WG W-10 277638006 5/4/2011 Ce-141 -3.38E+00 1.93E+00 3.75E+00 U WG W-10 277638006 5/4/2011 Ce-i144 8.32E-01 3.15E+00 1.02E+01 U WG W-10 277638006 5/4/2011 Co-57 -2.60E-01 4.06E-01 1.29E+00 U WG W-10 277638006 5/4/2011 Co-58 3.39E-01 5.33E-01 1.76E+00 U WG W-10 277638006 5/4/2011 Co-60 8.23E-01 5.95E-01 1.94E+00 U WG W-10 .277638006 5/4/2011 Cr-51 -6.77E-01 6.69E+00 2.20E+0 I U WG W-10 277638006 5/4/2011 Cs-134 1.33E-01 5.69E-01 1.87E+00 U WG W-10 277638006 5/4/2011 Cs-137 6.11 E-02 4.95E-01 1.65E+00 U WG W-10 277638006 5/4/2011 Fe-59 1.70E+00 1.29E+00 4.29E+00 U WG W-10 277638006 5/4/2011 H-3 3.54E+02 1.68E+02 4.82E+02 U WG W-10 277638006 5/4/2011 1-131 -3.54E-01 3.39E+00 1.11E+01 U WG W-10 277638006 5/4/2011 K-40 -1.46E+01 1.07E+01 2.24E+01 U WG W-10 277638006 5/4/2011 La-140 2.57E+00 2.25E+00 7.35E+00 U WG W-10 277638006 5/4/2011 Mn-54 4.31E-02 4.67E-01 1.53E+00 U WG W-10 277638006 5/4/2011 Nb-95 -3.06E-01 5.95E-01 1.91E+00 U WG W-10 277638006 5/4/2011 Ru-103 -2.23E+00 8.72E,01 2.03E+00 U WG W-10 277638006 5/4/2011 Ru-106 3.02E+00 4.32E+00 1.45E+01 U WG W-10 277638006 5/4/2011 Sb-124 -1.44E+00 1.45E+00 4.54E+00 U WG W-10 277638006 5/4/2011 Sb-125 -1.12E-03 1.28E+00 4.15E+00 U WG W-10 277638006 5/4/2011 Se-75 3.02E-01 6.62E-01 2.2 1E+00 U WG W-10 277638006 5/4/2011 Th-228 -1.97E+00 1.72E+00 3.37E+00 U WG W-10 277638006 5/4/2011 Zn-65 -1.18E+00 1.01E+00 3.11 E+00 U WG W-10 277638006 5/4/2011 Zr-95 -1.60E-01 1.01E+00 3.29E+00 U WG W-I1I 277638007 5/4/2011 Ac-228 1.99E-01 3.46E+00 6.79E+00 U D-162

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-11 277638007 5/4/2011 Ag-108m 2.92E-01 4.17E-01 1.37E+00 U WG W-11 277638007 5/4/2011 Ag-i I10m -2.20E-02 4.30E-01 1.45E+00 U WG W-11 277638007 5/4/2011 Ba-140 -2.73E-01 1.90E+00 6.21E+00 U WG W-11 277638007 5/4/2011 Be-7 4.96E+00 5.16E+00 1.67E+01 U WG W-11 277638007 5/4/2011 Ce-141 1.90E+00 2.58E+00 4.08E+00 U WG W-11 277638007 5/4/2011 Ce-144 -*1.80E+00 3.56E+00 1.15E+01 U WG W-11 277638007 5/4/2011 Co-57 -1.51E-01 4.73E-01 1.54E+00 U WG W-11 277638007 5/4/2011 Co-58 -4.43E-01 6.11E-01 1.68E+00 U WG W-11 277638007 5/4/2011 Co-60 7.24E-01 5.07E-01 1.68E+00 U WG W-11 277638007 5/4/2011 Cr-51 -6.91E+00 6.97E+00 2.23E+01 U WG W-11 277638007 5/4/2011 Cs-134 6.35E-01 6.29E-01 1.98E+00 U WG W-11 277638007 5/4/2011 Cs-137 -1.59E-01 4.51E-01 1.50E+00 U WG W-11 277638007 5/4/2011 Fe-59 1.48E+00 1.30E+00 4.20E+00 U WG .W-11 277638007 5/4/2011 H-3 -3.03E+01 1.45E+02 4.83E+02 U WG W-11 277638007 5/4/2011 1-131 -1.10E+00 3.52E+00 1.16E+01 U WG W-11 277638007 5/4/2011 K-40" 7.86E+00 1.29E+01 1.59E+01 U WG W-11 277638007 5/4/2011 La-140 -2.73E-01 1.90E+00 6.21E+00 U WG W-11 277638007 5/4/2011 Mn-54 -2.69E-01 4.73E-01 1.53E+00 U WG W-11 277638007 5/4/2011 Nb-95 5.82E-01 5.67E-01 1.88E+00 U WG W-11 277638007 5/4/2011 Ru-103 -3.43E-02 6.58E-01 2.13E+00 U WG W-11 277638007 5/4/2011 Ru-106 -1.14E+00 3.97E+00 1.33E+01 U WG W-11 277638007 5/4/2011 Sb-124 -2.12E+00 1.38E+00 3.85E+00 U WG W-11 277638007 5/4/2011 Sb-125 -2.09E+00 1.37E+00 4.04E+00 U WG W-11 277638007 5/4/2011 Se-75 -1.03E+00 7.17E-01 2.23E+00 U WG W-11 277638007 5/4/2011 Th-228 1.20E+00 1.61E+00 3.33E+00 U WG W-11 277638007 5/4/2011 Zn-65 -1.03E+00 1.08E+00 3.27E+00 U WG W-11 277638007 5/4/2011 Zr-95 1.28E+00 9.73E-01 3.20E+00 U WG W-12 277638008 5/4/2011 Ac-228 2.87E+00 2.78E+00 6.72E+00 U WG W-12 277638008 5/4/2011 Ag-108m 1.23E-02 4.40E-01 1.47E+00 U WG W-12 277638008 5/4/2011 Ag-110m -6.97E-01 5.20E-01 1.56E+00 U WG W-12 277638008 5/4/2011 Ba- 140 6.11E-01 1.89E+00 6.18E+00 U WG W-12 277638008 5/4/2011 Be-7 6.44E+00 5.38E+00 1.75E+01 U WG W-12 277638008 5/4/2011 Ce-I141 9.31E-01 1.45E+00 4.57E+00 U WG W-12 277638008 5/4/2011 Ce-I144 4.02E+00 3.93E+00 1.27E+01 U WG W-12 277638008 5/4/2011 Co-57 6.25E-01 5.12E-01 1.64E+00 U WG W-12 277638008 5/4/2011 Co-58 -3.01E-01 5.67E-01 1.79E+00 U WG W-12 5/4/2011 277638008 Co-60 7.82E-01 5.49E-01 1.78E+00 U WG W-12 277638008 5/4/2011 Cr-51 -4.06E+00 7.15E+00 2.37E+01 U WG W-12 277638008 5/4/2011 Cs-134 -2.711E-01 5.92E-01. 1.88E+00 U WG W-12 277638008 5/4/2011 Cs-137 1.04E+00 5.64E-01 1.74E+00 U WG W-12 277638008 5/4/2011 Fe-59 1.37E+00 1.21E+00 3.99E+00 U WG. W-12 277638008 5/4/2011 H-3 4.97E+01 1.52E+02 4.90E+02 U WG W-12 277638008 5/4/2011 1-131 6.74E-01 3.78E+00 1.27E+01 U WG W-12 277638008 5/4/2011 K-40 1.68E+01 1.26E+01 1.38E+01 UI WG W-12 277638008 5/4/2011 La-140 6.11E-01 1.89E+00 6.18E+00 0 WG W-12 277638008 5/4/2011 Mn-54 2.07E-01 4.68E-01 1.52E+00 U WG W-12 277638008 5/4/2011 Nb-95 1.67E+00 7.10E-01 2.05E+00 U WG W-12 277638008 5/4/2011 Ru- 103 3.72E-01 6.90E-01 2.29E+00 U WG W-12 277638008 5/4/2011 Ru-106 -3.34E+00 4.53E+00 1.44E+01 U WG W-12 277638008 5/4/2011 Sb-124 -2.OOE-01 1.29E+00 4.15E+00 U WG W-12 277638008 5/4/2011 Sb-125 -5.04E-01 1.36E+00 4.49E+00 U D-163

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-12 277638008 5/4/2011 Se-75 -3.23E-02 7.92E-01 2.55E+00 U WG W-12 277638008 5/4/2011 Th-228 3.09E-01 1.97E+00 3.87E+00 U WG W-12 277638008 5/4/2011 Zn-65 -1.07E+00 1.07E+00 3.36E+00 U WG W-12 277638008 5/4/2011 Zr-95 1.91E-01 1.02E+00 3.32E+00 U WG W-13 277638009 5/4/2011 Ac-228 1.14E+01 4.26E+00 8.17E+00 U' WG W-13 277638009 5/4/2011 Ag-108m 1.23E-01 4.88E-01 1.58E+00 U WG W-13 277638009 5/4/2011 Ag-110m 1.34E-01 5.51E-01 1.83E+00 U WG W-13 277638009 5/4/2011 Ba- 140 -4.89E-01 2.35E+00 7.80E+00 U WG W-13 277638009 5/4/2011 Be-7 9.70E+00 6.32E+00 1.96E+01 U WG W-13 277638009 5/4/2011 Ce- 141 3.94E+00 1.71E+00 4.78E+00 U WG W-13 277638009 5/4/2011 Ce- 144 2.30E+00 3.92E+00 1.26E+01 U WG W-13 277638009 5/4/2011 Co-57 3.38E-01 5.15E-01 1.66E+00 U WG W-13 277638009 5/4/2011 Co-58 -4.81E-01 6.41E-01 2.01E+00 U WG W-13 277638009 5/4/2011 Co-60 -2.13E-01 5.73E-01 1.84E+00 U WG W-13 277638009 5/4/2011 Cr-51 7.81E+00 8.5 1E+00 2.78E+01 U WG W-13 277638009 5/4/2011 Cs-134 4.84E-01 6.84E-01 2.24E+00 U WG W-13 277638009 5/4/2011 Cs-137 6.28E-01 5.72E-01 1.88E+00 U WG W-13 277638009 5/4/2011 Fe-59 1.38E+00 1.41E+00 4.70E+00 U WG W-13 277638009 5/4/2011 H-3 1.62E+01 1.47E+02 4.80E+02 U WG W-13 277638009 5/4/2011 1-131 -3.36E+00 4.57E+00 1.45E+01 U WG W-13 277638009 5/4/2011 K-40 3.59E+01 1.03E+01 1.78E+01 UI WG W-13 277638009 5/4/2011 La-140 -4.89E-01 2.35E+00 7.80E+00 U WG W-13 277638009 5/4/2011 Mn-54 -1.67E-01 5.41E-01 1.74E+00 U WG W-13 277638009 5/4/2011 Nb-95 1.51E-02 6.53E-01 2.14E+00 U WG W-13 277638009 5/4/2011 Ru-103 -2.37E+00 9.87E-01 2.56E+00 U WG W-13 277638009 5/4/2011 Ru-106 3.53E-01 4.92E+00 1.64E+01 U WG W-13 277638009 5/4/2011 Sb-124 -2.09E+00 1.63E+00 4.86E+00 U WG W-13 277638009 5/4/2011 Sb-125 4.70E-01 1.60E+00 5.17E+00 U WG W-13 277638009 5/4/2011 Se-75 -1.46E-01 8.37E-01 2.78E+00 U WG W-13 277638009 5/4/2011 Th-228 1.07E+01 3.19E+00 3.98E+00 UI WG W-13 277638009 5/4/2011 Zn-65 2.18E-02 1.28E+00 3.67E+00 U WG W-13 277638009 5/4/2011 Zr-95 -7.01E-01 1.17E+00 3.73E+00 U WG W-14 277638010 5/4/2011 Ac-228 3.48E+00 4.25E+00 7.36E+00 U WG W-14 277638010 5/4/2011 Ag-108m -1. 16E-01 4.23E-01 1.36E+00 U WG W-14 277638010 5/4/2011 Ag-110m -5.44E-01 4.70E-01 1.46E+00 U WG W-14 277638010 5/4/2011 Ba- 140 2.25E+00 2.27E+00 7.43E+00 U WG W-14 277638010 5/4/2011 Be-7 -1.43E+00 5.09E+00 1.62E+01 U WG W-14 277638010 5/4/2011 Ce-I141 -5.45E-01 1.76E+00 3.78E+00 U WG W-14 277638010 5/4/2011 Ce- 144 6.83E+00 3.53E+00 1.03E+01 U WG W-14 277638010 5/4/2011 Co-57 -1.68E-01 4.05E-01 1.30E+00 U WG W-14 277638010 5/4/2011 Co-58 -9.59E-02 5.17E-01 1.68E+00 U WG W-14 277638010 5/4/2011 Co-60 -2.07E-01 4.64E-01 1.49E+00 U WG W-14 277638010 5/4/2011 Cr-51 -9.47E+00 6.82E+00 2.07E+01 U WG W-14 277638010 5/4/2011 Cs-134 7.59E-01 5.79E-01 1.88E+00 U WG W-14 277638010 5/4/2011 Cs-137 4.84E-01 4.98E-01 1.65E+00 U WG W-14 277638010 5/4/2011 Fe-59 1.08E+00 1.23E+00 4.15E+00 U WG W-14 277638010 5/4/2011 H-3 1.81E+02 1.60E+02 4.92E+02 U WG W-14 277638010 5/4/2011 1-131 -3. 19E+00 3.67E+00 1.15E+01 U WG W-14 277638010 5/4/2011 K-40 1.40E+01 1.37E+01 1.62E+01 U WG W-14 277638010 5/4/2011 La-140 2.25E+00 2.27E+00 7.43E+00 U WG W-14 277638010 5/4/2011 Mn-54 -5.58E-01 4.95E-01 1.51E+00 U D-164

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-14 277638010 5/4/2011 Nb-95 8.41E-01 6.10E-01 1.97E+00 U WG W-14 277638010 5/4/2011 Ru-103 -1.30E+00 7.70E-01 2.16E+00 U WG W-14 277638010 5/4/2011 Ru-106 6.35E+00 4.59E+00 1.50E+01 U WG W-14 277638010 5/4/2011 Sb-124 4.92E-01 1.50E+00 5.06E+00 U WG W-14 277638010 5/4/2011 Sb-125 -1.69E+00 1.39E+00 4.21E+00 U WG W-14 277638010 5/4/2011 Se-75 -3.29E-01 6.82E-01 2.25E+00 U WG W-14 277638010 5/4/2011 Th-228 -5.62E-01 1.66E+00 3.45E+00 U WG W-14 277638010 5/4/2011 Zn-65 -6.53E-01 1.03E+00 3.34E+00 U WG W-14 277638010 5/4/2011 Zr-95 6.21E-01 1.00E+00 3.32E+00 U WG W-15 277638011 5/5/2011 Ac-228 6.95E-01 3.89E+00 7.56E+00 U WG W-15 277638011 5/5/2011 Ag-108m 2.OOE-01 4.70E-01 1.51E+00 U WG W-15 277638011 5/5/2011 Ag-110m 3.82E-01 5.28E-01 1.75E+00 U WG W-15 277638011 5/5/2011 Ba- 140 3.75E+00 2.58E+00 8.52E+00 U WG W-15 277638011 5/5/2011 Be-7 -7.67E+00 8.37E+00 1.97E+01 U WG W-15 277638011 5/5/2011 Ce- 141 3.41E+00 1.64E+00 4.70E+00 U WG W-15 277638011 5/5/2011 Ce- 144 -3.14E+00 4.01E+00 1.24E+01 U WG W-15 277638011 5/5/2011 Co-57 -3.23E-01 5.26E-01 1.65E+00 U WG W-15 277638011 5/5/2011 Co-58 -1.53E+00 7.18E-01 1.85E+00 U WG W-15 277638011 5/5/2011 Co-60 -5.97E-01 6.15E-01 1.87E+00 U WG W-15 277638011 5/5/2011 Cr-51 -4.34E+00 7.62E+00 2.44E+01 U WG W-15 277638011 5/5/2011 Cs-134 -7.69E-01 6.73E-01 2.02E+00 U WG W-15 277638011 5/5/2011 Cs-137 1.07E-01 5.31E-01 1.75E+00 U WG W-15 277638011 5/5/2011 Fe-59 3.84E+00 1.69E+00 5.13E+00 U WG W-15 277638011 5/5/2011 H-3 3.91E+02 1.72E+02 4.88E+02 U WG W-15 277638011 5/5/2011 1-131 3.16E+00 4.02E+00 1.30E+01 U WG W-15 277638011 5/5/2011 K-40 -4.96E+00 1.04E+01 2.26E+01 U WG W-15 277638011 5/5/2011 La-140 3.75E+00 2.58E+00 8.52E+00 U WG W-15 277638011 5/5/2011 Mn-54 3.91E-02 5.16E-01 1.67E+00 U WG W-15 277638011 5/5/2011 Nb-95 1.36E+00 7.46E-01 2.3 1E+00 U WG W-15 277638011 5/5/2011 Ru-103 -1.37E+00 8.07E-01 2.38E+00 U WG W-15 277638011 5/5/2011 Ru-106 -4.47E+00 4.92E+00 1.55E+01 U WG W-15 277638011 5/5/2011 Sb-124 -4.26E-01 1.46E+00 4.76E+00 U WG W-15 277638011 5/5/2011 Sb-125 -9.44E-01 1.45E+00 4.52E+00 U WG W-15 277638011 5/5/2011 Se-75 -9.67E-01 7.90E-01 2.45E+00 U WG W-15 277638011 5/5/2011 Th-228 -4.38E+00 2.59E+00 5.16E+00 U WG W-15 277638011 5/5/2011 Zn-65 2.41E-01 1.13E+00 3.76E+00 U WG W-15 277638011 5/5/2011 Zr-95 1.55E+00 1.16E+00 3.72E+00 U WG MW-20 277638012 5/4/2011 Ac-228 8.12E+00 3.47E+00 6.79E+00 UI WG MW-20 277638012 5/4/2011 Ag-108m -2.39E-02 4.25E-01 1.39E+00 U WG MW-20 277638012 5/4/2011 Ag-110m -4.02E-01 4.62E-01 1.49E+00 U WG MW-20 277638012 5/4/2011 Ba-140 -1.02E+00 1.96E+00 6.24E+00 U WG MW-20 277638012 5/4/2011 Be-7 3.01E+00 4.91E+00 1.61E+01 U WG MW-20 277638012 5/4/2011 Ce-141 2.95E-01 1.32E+00 4.3 1E+00 U WG MW-20 277638012 5/4/2011 Ce-144 1.56E+00 3.51E+00 1.15E+01 U WG MW-20 277638012 5/4/2011 Co-57 3.98E-01 4.75E-01 1.54E+00 U WG MW-20 277638012 5/4/2011 Co-58 -3.49E-01 5.58E-01 1.80E+00 U WG MW-20 277638012 5/4/2011 Co-60 -3.75E-01 4.81E-01 1.53E+00 U WG MW-20 277638012 5/4/2011 Cr-51 -1. 16E+01 7.34E+00 2.2 1E+0 I U WG MW-20 277638012 5/4/2011 Cs-134 8.22E-01 5.67E-01 1.85E+00 U WG MW-20 277638012 5/4/2011 Cs-137 4.65E-03 4.71E-01 1.59E+00 U WG MW-20 277638012 5/4/2011 Fe-59 -1.40E+00 1.30E+00 3.90E+00 U D-165

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG MW-20 277638012 5/4/2011 H-3 0.OOE+00 1.49E+02 4.90E+02 U WG MW-20 277638012 5/4/2011 1-131 2.14E+00 3.75E+00 1.24E+01 U WG MW-20 277638012 5/4/2011 K-40 4.59E+01 1.01E+01 1.58E+01 UI WG MW-20 277638012 5/4/2011 La-140 -1.02E+00 1.96E+00 6.24E+00 U WG MW-20 277638012 5/4/2011 Mn-54 2.89E-01 4.51E-01 1.50E+00 U WG MW-20 277638012 5/4/2011 Nb-95 7.44E-01 5.72E-01 1.88E+00 U WG MW-20 277638012 5/4/2011 Ru- 103 -1.39E+00 7.67E-01 2.14E+00 U WG MW-20 277638012 5/4/2011 Ru-106 -2.71E+00 4.08E+00 1.34E+01 U WG MW-20 277638012 5/4/2011 Sb-124 1.66E+00 1.43E+00 4.74E+00 U WG MW-20 277638012 5/4/2011 Sb-125 6.32E-01 1.28E+00 4.23E+00 U WG MW-20 '277638012 5/4/2011 Se-75 -1.42E-01 6.98E-01 2.35E+00 U WG MW-20 277638012 5/4/2011 Th-228 4.22E+00 1.36E+00 3.18E+00 UI WG MW-20 277638012 5/4/2011 Zn-65 -1.54E+00 1.18E+00 3.46E+00 U WG MW-20 277638012 5/4/2011 Zr-95 7.71E-01 9.88E-01 3.3 1E+00 U WG MW-21 277638013 5/4/2011 Ac-228 -3.25E+00 3.55E+00 6.OOE+00 U WG MW-21 277638013 5/4/2011 Ag-108m -9.60E-01 4.11E-01 1.08E+00 U WG MW-21 277638013 5/4/2011 Ag-110m 3.15E-01 4.24E-01 1.39E+00 U WG MW-21 277638013 5/4/2011 Ba- 140 -3.43E+00 1.97E+00 5.49E+00 U WG MW-21 277638013 5/4/2011 Be-7 8.58E+00 4.60E+00 1.44E+01 U WG MW-21 277638013 5/4/2011 Ce- 141 6.09E-01 1.09E+00 3.27E+00 U WG MW-21 277638013 5/4/2011 Ce- 144 -9.24E-01 2.70E+00 9.OOE+00 U WG MW-21 277638013 5/4/2011 Co-57 8.23E-02 3.49E-01 1.18E+00 U WG MW-21 277638013 5/4/2011 Co-58 -2.93E-01 5.61E-01 1.61E+00 U WG MW-21 277638013 5/4/2011 Co-60 -2.64E-01 4.50E-01 1.41E+00 U WG MW-21 277638013 5/4/2011 Cr-51 2.99E+00 5.99E+00 1.91E+01 U WG MW-21 277638013 5/4/2011 Cs-134 5.71E-01 5.12E-01 1.59E+00 U WG MW-21 277638013 5/4/2011 Cs-137 7.29E-01 4.65E-01 1.47E+00 U WG MW-21 277638013 5/4/2011 Fe-59 -1.26E+00 1.09E+00 3.31E+00 U WG MW-21 277638013 5/4/2011 H-3 1.67E+01 1.51E+02 4.93E+02 U WG MW-21 277638013 5/4/2011 1-131 -4.21E+00 3.20E+00 1.01E+01 U WG MW-21 277638013 5/4/2011 K-40 5.89E+00 9.49E+00 1.61E+01 U WG MW-21 277638013 5/4/2011 La-140 -3.43E+00 1.96E+00 5.49E+00 U WG MW-21 277638013 5/4/2011 Mn-54 -4.56E-01 4.31E-01 1.36E+00 U WG MW-21 277638013 5/4/2011 Nb-95 3.3 1E-01 5.22E-01 1.69E+00 U WG MW-21 277638013 5/4/2011 Ru-103 -2.13E-01 6.50E-01 1.87E+00 U WG MW-21 277638013 5/4/2011 Ru-106 -2.95E+00 3.88E+00 1.22E+01 U WG MW-21 277638013 5/4/2011 Sb-124 3.11E-01 1.15E+00 3.85E+00 U WG MW-21 277638013 5/4/2011 Sb-125 -4.39E-01 1.09E+00 3.60E+00 U WG MW-21 277638013 5/4/2011 Se-75 -4.18E-01 6.23E-01 1.96E+00 U WG MW-21 277638013 5/4/2011 Th-228 9.02E-01 1.43E+00 2.90E+00 U WG MW-21 277638013 5/4/2011 Zn-65 -1.53E+00 9.35E-01 2.65E+00 U WG MW-21 277638013 5/4/2011 Zr-95 2.73E-01 8.98E-01 2.91E+00 U WG SG-1 277638014 5/3/2011 Ac-228 7.06E+00 6.07E+00 1.19E+01 U WG SG-1 277638014 5/3/2011 Ag-108m 3.43E-01 6.08E-01 1.99E+00 U WG SG-I 277638014 5/3/2011 Ag-110m 7.58E-01 7.25E-01 2.44E+00 U WG SG-1 277638014 5/3/2011 ALPHA 1.17E+00 1.04E+00 1.99E+00 U WG SG-1 277638014 5/3/2011 Ba-140 -1.92E+00 3.OOE+00 9.17E+00 U WG SG-1 277638014 5/3/2011 Be-7 6.97E+00 8.24E+00 2.67E+01 U WG SG-1 277638014 5/3/2011 BETA 3.34E+00 1.26E+00 3.11E+00 M WG SG-1 277638014 5/3/2011 Ce-141 -1.21E+00 1.67E+00 5.18E+00 U WG SG-1 277638014 5/3/2011 Ce-144 -7.88E+00 4.86E+00 1.38E+01 U D-166

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-1 277638014 5/3/2011 Co-57 -3.42E-01 5.97E-01 1.89E+00 U WG SG-1 277638014 5/3/2011 Co-58 -1.61E+00 9.61E-01 2.65E+00 U WG SG-1 277638014 5/3/2011 Co-60 -7.68E-01 8.70E-01 2.67E+00 U WG SG-1 277638014 5/3/2011 Cr-51 9.85E+00 1.05E+01 3.47E+01 U WG SG-1 277638014 5/3/2011 Cs-134 4.71E-01 8.82E-01 2.94E+00 U WG SG-1 277638014 5/3/2011 Cs-137 -6.01E-02 7.38E-01 2.45E+00 U WG SG-1 277638014 5/3/2011 Fe-59 2.52E-01 2.27E+00 7.62E+00 U WG SG-1 277638014 5/3/2011 H-3 8.15E+01 1.51E+02 4.82E+02 U WG SG-1 277638014 5/3/2011 1-131 -6.89E+00 5.33E+00 1.59E+01 U WG SG-1 277638014 5/3/2011 K-40 1.86E+01 1.55E+01 2.22E+0 I U WG SG-1 277638014 5/3/2011 La- 140 -1.92E+00 3.00E+00 9.17E+00 U WG SG-1 277638014 5/3/2011 Mn-54 1.62E-01 7.75E-01 2.55E+00 U WG SG-1 277638014 5/3/2011 Nb-95 3.29E-02 9.20E-01 3.03E+00 U WG SG-1 277638014 5/3/2011 Ru-103 -2.26E+00 1.18E+00 3.10E+00 U WG SG-1 277638014 5/3/2011 Ru-106 -8.55E+00 7.27E+00 2.23E+01 U WG SG-1 277638014 5/3/2011 Sb-124 1.58E+00 2.36E+00 7.91E+00 U WG SG-I 277638014 5/3/2011 Sb-125 1.71E-01 1.91E+00 6.20E+00 U WG SG-1 277638014 5/3/2011 Se-75 -6.93E-01 1.01E+00 3.28E+00 U WG SG-1 277638014 5/3/2011 Th-228 2.06E+00 2.30E+00 5.19E+00 U WG SG-I 277638014 5/3/2011 Zn-65 -5.09E+00 2.1OE+00 4.96E+00 U WG SG-1 277638014 5/3/2011 Zr-95 -1.96E+00 1.69E+00 5.09E+00 U WG SG-2 277638015 5/3/2011 Ac-228 3.32E+00 4.20E+00 8.04E+00 U WG SG-2 277638015 5/3/2011 Ag-108m 2.97E-01 4.73E-01 1.59E+00 U WG SG-2 277638015 5/3/2011 Ag-110m 1.43E-01 5.69E-01 1.89E+00 U WG SG-2 277638015 5/3/2011 ALPHA 4.51E-01 1.06E+00 3.26E+00 U WG SG-2 277638015 5/3/2011 Ba- 140 -1.69E+00 2.26E+00 7.05E+00 U WG SG-2 277638015 5/3/2011 Be-7 7.83E+00 5.92E+00 1.95E+01 U WG SG-2 277638015 5/3/2011 BETA 6.64E+00 2.05E+00 6.01E+00 DL DL WG SG-2 277638015 5/3/2011 Ce-I141 -6.05E-01 1.34E+00 4.23E+00 U WG SG-2 277638015 5/3/2011 Ce- 144 4.78E+00 3.93E+00 1.23E+01 U WG SG-2 277638015 5/3/2011 Co-57 -9.01E-01 5.05E-01 1.48E+00 U WG SG-2 277638015 5/3/2011 Co-58 4.31E-01 6.35E-01 2.09E+00 U WG SG-2 277638015 5/3/2011 Co-60 2.37E-01 6.21E-01 2.08E+00 U WG SG-2 277638015 5/3/2011 Cr-51 -2.21E+00 7.86E+00 2.51E+01 U WG SG-2 277638015 5/3/2011 Cs-134 1.79E-01 6.66E-01 2.19E+00 U WG SG-2 277638015 5/3/2011 Cs-137 3.86E-01 5.91E-01 1.96E+00 U WG SG-2 277638015 5/3/2011 Fe-59 1.58E+00 1.47E+00 4.96E+00 U WG SG-2 277638015 5/3/2011 H-3 -3. 1OE+01. 1.49E+02 4.94E+02 U WG SG-2 277638015 5/3/2011 1-131 9.78E-01 4. 1OE+00 1.32E+01 U WG SG-2 277638015 5/3/2011 K-40 -7.83E+00 1.05E+01 2.3 1E+01 U WG SG-2 277638015 5/3/2011 La-140 -1.69E+00 2.26E+00 7.05E+00 U WG SG-2 277638015 5/3/2011 Mn-54 4.43E-01 5.77E-01 1.90E+00 U WG SG-2 277638015 5/3/2011 Nb-95 9.32E-01 7.10E-01 2.30E+00 U WG SG-2 277638015 5/3/2011 Ru-103 4.07E-01 7.84E-01 2.63E+00 U WG SG-2 277638015 5/3/2011 Ru-106 2.42E+00 5.13E+00 1.71E+01 U WG SG-2 277638015 5/3/2011 Sb-124 -1.87E+00 1.87E+00 5.65E+00 U WG SG-2 277638015 5/3/2011 Sb-125 -2.30E+00 1.54E+00 4.69E+00 U WG SG-2 277638015 5/3/2011 Se-75 8.74E-01 8.38E-01 2.69E+00 U WG SG-2 277638015 5/3/2011 Th-228 6.76E-01 1.62E+00 3.65E+00 U WG SG-2 277638015 5/3/2011 Zn-65 -3.08E-01 1.25E+00 4.15E+00 U WG SG-2 277638015 5/3/2011 Zr-95 -1.50E+00 1.23E+00 3.69E+00 U D-167

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-4 277638016 5/3/2011 Ac-228 -8.11 E+00 4.77E+00 8.77E+00 U WG SG-4 277638016 5/3/2011 Ag-108m -4.09E-01 4.93E-01 1.57E+00 U WG SG-4 277638016 5/3/2011 Ag-110m 2.53E-01 6.07E-01 1.96E+00 U WG SG-4 277638016 5/3/2011 ALPHA 1.67E+00 1.09E+00 1.70E+00 U WG SG-4 277638016 5/3/2011 Ba-140 1.03E+00 2.73E+00 9.08E+00 U WG SG-4 277638016 5/3/2011 Be-7 -6.69E+00 6.16E+00 1.91E+01 U WG SG-4 277638016 5/3/2011 BETA 1.11E+01 1.97E+00 3.48E+00 WG SG-4 277638016 5/3/2011 Ce- 141 1.90E+00 2.06E+00 3.54E+00 U WG SG-4 277638016 5/3/2011 Ce- 144 1.65E+00 2.91E+00 9.67E+00 U WG SG-4 277638016 5/3/2011 Co-57 -1.21E-01 3.73E-01 1.24E+00 U WG SG-4 277638016 5/3/2011 Co-58 6.1IE-01 7.01E-01 2.35E+00 U WG SG-4 277638016 5/3/2011 Co-60 1.12E+00 7.49E-01 2.48E+00 U WG SG-4 277638016 5/3/2011 Cr-51 -2.27E-01 7.26E+00 2.45E+01 U WG SG-4 277638016 5/3/2011 Cs-134 1.13E+00 7.50E-01 2.46E+00 U WG SG-4 277638016 5/3/2011 Cs-137 2.93E-01 6.58E-01 2.12E+00 U WG SG-4 277638016 5/3/2011 Fe-59 2.34E+00 1.80E+00 5.83E+00 U WG SG-4 277638016 5/3/2011 H-3 1.18E+02 1.58E+02 4.97E+02 U WG SG-4 277638016 5/3/2011 1-131 -8.54E-01 4.04E+60 1.35E+01 U WG SG-4 277638016 5/3/2011 K-40 2.14E+01 8.84E+00 2.66E+01 U WG SG-4 277638016 5/3/2011 La-140 1.03E+00 2.73E+00 9.08E+00 U WG SG-4 277638016 5/3/2011 Mn-54 -7.29E-01 6.21E-01 1.91E+00 U WG SG-4 277638016 5/3/2011 Nb-95 3.32E-01 7.32E-01 2.47E+00 U WG SG-4 277638016 5/3/2011 Ru-103 -1.69E+00 9.01E-01 2.51E+00 U WG SG-4 277638016 5/3/2011 Ru-106 -4.24E+00 5.22E+00 1.61E+01 U WG SG-4 277638016 5/3/2011 Sb-124 -1.04E-01 1.94E+00 6.32E+00 U WG SG-4 277638016 5/3/2011 Sb-125 -4.1 OE+00 1.78E+00 4.68E+00 U WG SG-4 277638016 5/3/2011 Se-75 1.03E+00 7.86E-01 2.45E+00 U WG SG-4 277638016 5/3/2011 Th-228 5.20E-01 2.14E+00 2.89E+00 U WG SG-4 277638016 5/3/2011 Zn-65 4.32E-01 1.35E+00 4.43E+00 U WG SG-4 277638016 5/3/2011 Zr-95 2.92E-01 1.37E+00 4.61E+00 U WG SG-5 277638017 5/3/2011 Ac-228 -7.76E+00 3.77E+00 6.31E+00 U WG SG-5 277638017 5/3/2011 Ag-108m -2.63E-01 4.04E-01 1.33E+00 U WG SG-5 277638017 5/3/2011 Ag-110m -4.44E-01 4.65E-01 1.46E+00 U WG SG-5 277638017 5/3/2011 ALPHA 2.35E+00 1.34E+00 2.39E+00 U WG SG-5 277638017 5/3/2011 Ba- 140 -2.18E+00 2.34E+00 7.25E+00 U WG SG-5 277638017 5/3/2011 Be-7 2.23E+00 4.96E+00 1.67E+01 U WG SG-5 277638017 5/3/2011 BETA 4.03E+01 4.22E+00 2.54E+00 WG SG-5 277638017 5/3/2011 Ce- 141 9.20E-01 1.19E+00 3.80E+00 U WG SG-5 277638017 5/3/2011 Ce- 144 1.64E+00 3.40E+00 1.04E+01 U WG SG-5 277638017 5/3/2011 Co-57 5.83E-01 4.28E-01 1.37E+00 U WG SG-5 277638017 5/3/2011 Co-58 -2.83E-01 5.75E-01 1.84E+00 U WG SG-5 277638017 5/3/2011 Co-60 2.21E-01 5.17E-01 1.73E+00 U WG SG-5 277638017 5/3/2011 Cr-51 3.47E-01 7.04E+00 2.27E+01 U WG SG-5 277638017 5/3/2011 Cs-134 7.76E-01 5.91E-01 1.91E+00 U WG SG-5 277638017 5/3/2011 Cs-137 4.99E-01 4.83E-01 1.59E+00 U WG SG-5 277638017 5/3/2011 Fe-59 -4.81E-01 1.26E+00 4.16E+00 U WG SG-5 277638017 5/3/2011 H-3 -1.43E+02 1.38E+02 4.78E+02 U WG SG-5 277638017 5/3/2011 1-131 2.95E-01 3.79E+00 1.22E+01 U WG SG-5 277638017 5/3/2011 K-40 3.81E+01 1.20E+01 1.58E+01 WG SG-5 277638017 5/3/2011 La-140 -2.18E+00 2.34E+00 7.25E+00 U WG SG-5 277638017 5/3/2011 Mn-54 1.16E-01 4.74E-01 1.55E+00 U D-168

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC 'FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-5 277638017 5/3/2011 Nb-95 4.10E-01 5.78E-01 1.90E+00 U WG SG-5 277638017 5/3/2011 Ru-103 -6.49E-01 6.58E-01 2.09E+00 U WG SG-5 277638017 5/3/2011 Ru-106 3.11E+00 4.34E+00 1.44E+01 U WG SG-5 277638017 5/3/2011 Sb-124 3.04E-01 1.52E+00 5.01E+00 U WG SG-5 277638017 5/3/2011 Sb-125 7.08E-01 1.20E+00 4.05E+00 U WG SG-5 277638017 5/3/2011 Se-75 1.17E-01 6.80E-01 2.21E+00 U WG SG-5 277638017 5/3/2011 Th-228 1.13E+00 1.46E+00 3.05E+00 U WG SG-5 277638017 5/3/2011 Zn-65 -1.36E+00 1.07E+00 3.28E+00 U WG SG-5 277638017 5/3/2011 Zr-95 -1.38E+00 1.04E+00 3.11E+00 U WG W-4 277697001 5/6/2011 Ac-228 -6.49E+00 4.38E+00 1.1iE+01 U WG W-4 277697001 5/6/2011 Ag-108m -5.16E-01 7.68E-01 2.39E+00 U WG W-4 277697001 5/6/2011 Ag-1 10ml -3.69E-01 8.15E-01 2.64E+00 U WG W-4 277697001 5/6/2011 Ba-140 7.81E+00 4.30E+00 1.44E+01 U WG W-4 277697001 5/6/2011 Be-7 -6.38E+00 9.66E+00 2.98E+01 U WG W-4 277697001 5/6/2011 Ce- 141 5.39E-01 2.16E+00 6.94E+00 U WG W-4 277697001 5/6/2011 Ce- 144 -5.96E+00 6.07E+00 1.86E+01 U WG W-4 277697001 5/6/2011 Co-57 7.15E-01 7.52E-01 2.41E+00 U WG W-4 277697001 5/6/2011 Co-58 -1.61E+00 1.05E+00 2.96E+00 U WG W-4 277697001 5/6/2011 Co-60 2.29E-01 8.22E-01 2.73E+00 U WG W-4 277697001 5/6/2011 Cr-51 .1.30E+01 1.31E+01 4.29E+01 U WG W-4 277697001 5/6/2011 Cs-134 5.94E-01 9.14E-01 3.04E+00 U WG W-4 277697001 5/6/2011 Cs-137 4.42E-01 8.23E-01 2.75E+00 U WG W-4 277697001 5/6/2011 Fe-59 3.54E+00 2.22E+00 7.41E+00 U WG W-4 277697001 5/6/2011 H-3 6.33E+02 1.72E+02 4.41E+02 M WG W-4 277697001 5/6/2011 1-131 1.60E+01 8.88E+00 2.77E+01 U-WG W-4 277697001 5/6/2011 K-40 8.95E+01 1.28E+01 2.60E+0 I UI WG W-4 277697001 5/6/2011 La-140 7.81 E+00 4.28E+00 1.44E+01 U WG W-4 277697001 5/6/2011 Mn-54 4.25E-01 8.11E-01 2.68E+00 U WG W-4 277697001 5/6/2011 Nb-95 -1.84E-01 9.69E-01 3.14E+00 U WG W-4 277697001 5/6/2011 Ru-103 -4.59E-01 ,1.28E+00 4.28E+00 U WG W-4 277697001 5/6/2011 Ru-106 -6.52E+00 7.48E+00 2.36E+01 U WG W-4 277697001 5/6/2011 Sb-124 -2.19E+00 2.74E+00 8.55E+00 U WG W-4 277697001 5/6/2011 Sb-125 1.72E+00 2.36E+00 7.67E+00 U WG W-4 277697001 5/6/2011 Se-75 -6.71E-02 1.23E+00 4.09E+00 U WG W-4 277697001 5/6/2011 Th-228 3.04E+00 2.34E+00 5.91E+00 U WG W-4 277697001 5/6/2011 Zn-65 -3.34E+00 2.17E+00 5.07E+00 U WG W-4 277697001 5/6/2011 Zr-95 6.63E-01 1.77E+00 5.85E+00 U WG W-5 277697002 5/6/2011 Ac-228 1.04E+00 3.64E+00 1.02E+01 U WG W-5 277697002 5/6/2011 Ag-108m 1.03E-01 6.38E-01 2.IIE+00 U WG W-5 277697002 5/6/2011 Ag-110m -2.21E-01 7.69E-01 2.46E+00 U WG W-5 277697002 5/6/2011 Ba-140 4.49E+00 3.58E+00 1.20E+01 U WG W-5 277697002 5/6/2011 Be-7 6.96E+00 8.03E+00 2.65E+01 U WG W-5 277697002 5/6/2011 Ce- 141 1.48E+00 2.24E+00 6.69E+00 U WG W-5 277697002 5/6/2011 Ce-I144 -7.39E+00 5.75E+00 1.66E+01 U WG W-5 277697002 5/6/2011 Co-57 4.59E-01 6.84E-01 2.22E+00 U WG W-5 277697002 5/6/2011 Co-58 .- 3.89E-01 8.46E-01 2.78E+00 U WG W-5 277697002 5/6/2011 Co-60 -4.61 E-02 8.34E-01 2.73E+00 U WG W-5 277697002 5/6/2011 Cr-51 9.30E+00 1.12E+0I 3.75E+01 U WG W-5 277697002 5/6/2011 Cs-134 1.24E+00 8.93E-01 3.OOE+00 U WG W-5 277697002 5/6/2011 Cs-137 -1.81E-01 8.28E-01 2.66E+00 U WG W-5 277697002 5/6/2011 Fe-59 9.25E-01 2.04E+00 6.87E+00 U D-169

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-5 277697002 5/6/2011 H-3 1.11 E+03 2.05E+02 4.30E+02 M WG W-5 277697002 5/6/2011 1-131 -1.82E+00 7.29E+00 2.40E+01 U WG W-5 277697002 5/6/2011 K-40 2.67E+01 1.55E+01 2.39E+01 UI WG W-5 277697002 5/6/2011 La-140 4.49E+00 3.58E+00 1.20E+01 U WG W-5 277697002 5/6/2011 Mn-54 -3.94E-01 7.5 1E-01 2.45E+00 U WG W-5 277697002 5/6/2011 Nb-95 7.96E-01 8.75E-01 2.86E+00 U WG W-5 277697002 5/6/2011 Ru-103 9.30E-01 1.14E+00 3.76E+00 U WG W-5 277697002 5/6/2011 Ru-106 1.78E+00 6.87E+00 2.25E+01 U WG W-5 277697002 5/6/2011 Sb-124 -3.27E+00 2.54E+00 7.18E+00 U WG W-5 277697002 5/6/2011 Sb-125 1.06E+00 1.91 E+00 6.35E+00 U WG W-5 277697002 5/6/2011 Se-75 -1.10E+00 1.14E+00 3.66E+00 U WG W-5 277697002 5/6/2011 Th-228 3.22E+00 2.45E+00 5.38E+00 U WG W-5 277697002 5/6/2011 Zn-65 -2.17E+00 1.72E+00 5.13E+00 U WG W-5 277697002 5/6/2011 Zr-95 -6.85E-01 1.55E+00 4.88E+00 U WG W-6 277697003 5/6/2011 Ac-228 4.07E+00 2.91E+00 9.43E+00 U WG W-6 277697003 5/6/2011 Ag-108m 9.97E-01 6.24E-01 2.04E+00 U WG W-6 277697003 5/6/2011 Ag-110m -4.29E-01 6.91E-01 2.20E+00 U WG W-6 277697003 5/6/2011 Ba-140 -2.72E+00 3.03E+00 9.11E+00 U WG W-6 277697003 5/6/2011 Be-7 5.09E+00 7.63E+00 2.57E+01 U WG W-6 277697003 5/6/2011 Ce-141 1.12E+00 1.81E+00 5.81E+00 U WG W-6 277697003 5/6/2011 Ce- 144 -1.30E+00 4.65E+00 1.53E+01 U WG W-6 277697003 5/6/2011 Co-57 5.86E-02 6.01E-01 2.OOE+00 U WG W-6 277697003 5/6/2011 Co-58 -2.08E-01 8.33E-01 2.69E+00 U WG W-6 277697003 5/6/2011 Co-60 -1.96E+00 8.59E-01 2.06E+00 U WG W-6 277697003 5/6/2011 Cr-51 5.1OE+00 1.02E+01 3.32E+01 U WG W-6 277697003 5/6/2011 Cs-134 -2.90E-02 8.19E-01 2.67E+00 U WG W-6 277697003 5/6/2011 Cs-137 -4.51 E-01, 7.5 1E-01 2.40E+00 U WG W-6 277697003 5/6/2011 Fe-59 1.64E+00 1.96E+00 6.69E+00 U WG W-6 277697003 5/6/2011 H-3 7.33E+02 1.76E+02 4.30E+02 M WG W-6 277697003 5/6/2011 1-131 5.02E-01 6.23E+00 2.OOE+01 U WG W-6 277697003 5/6/2011 K-40 1.81E+01 1.74E+01 2.23E+01 U WG W-6 277697003 5/6/2011 La-140 -2.72E+00 3.03E+00 9.11E+00 U WG W-6 277697003 5/6/2011 Mn-54 4.99E-01 7.52E-01 2.48E+00 U WG W-6 277697003 5/6/2011 Nb-95 7.71E-01 8.70E-01 2.88E+00 U WG W-6 277697003 5/6/2011 Ru-103 1.79E-01 1.06E+00 3.55E+00 U WG W-6 277697003 5/6/2011 Ru-106 1.16E+01 6.89E+00 2.22E+01 U WG W-6 277697003 5/6/2011 Sb-124 -1.30E+00 2.28E+00 7. 14E+00 U WG W-6 277697003 5/6/2011 Sb-125 -3.69E-0 1 1.79E+00 5.98E+00 U WG W-6 277697003 5/6/2011 Se-75 2.35E+00 1.16E+00 3.50E+00 U WG W-6 277697003 5/6/2011 Th-228 -2.82E-01 1.67E+00 4.5 1E+00 U WG W-6 277697003 5/6/2011 Zn-65 -8.32E-01 1.61E+00 5.25E+00 U WG W-6 277697003 5/6/2011 Zr-95 -5.17E-01 I 54E+00 4.97E+00 U WG W-9 277697004 5/5/2011 Ac-228 5.45E+00 2.95E+00 9.45E+00 U WG W-9 277697004 5/5/2011 Ag-108m -6.30E-01 5.86E-01 1.76E+00 U WG W-9 277697004 5/5/2011 Ag-110m 3.86E-03 5.88E-01 1.97E+00 U WG W-9 277697004 5/5/2011 Ba-140 4.61E-01 2.94E+00 9.87E+00 U WG W-9 277697004 5/5/2011 Be-7 9.09E+00 7.40E+00 2.39E+01 U WG W-9 277697004 5/5/2011 Ce-141 -7.53E+00 2.91E+00 5.75E+00 U WG W-9 277697004 5/5/2011 Ce-144 -2.69E+00 4.42E+00 1.46E+01 U WG W-9 277697004 5/5/2011 Co-57 7.56E-01 6.OOE-01 1.99E+00 U WG W-9 277697004 5/5/2011 Co-58 3.38E-01 7.89E-01 2.65E+00 U D-170

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-9 277697004 5/5/2011 Co-60 1.27E+00 9.99E-01 2.26E+00 WG W-9 277697004 5/5/2011 Cr-51 6.25E+00 1.00E+01 3.31E+01 WG W-9 277697004 5/5/2011 Cs-134 -1.02E-01 7.45E-01 2.46E+00 WG W-9 277697004 5/5/2011 Cs-137, 1.18E-01 6.02E-01 2.03E+00 WG W-9 277697004 5/5/2011 Fe-59 -1.48E-01 1.86E+00 6.02E+00 WG W-9 277697004 5/5/2011 H-3 6.83E+01 1.31E+02 4.20E+02 WG W-9 277697004 5/5/2011 1-131 4.41E+00 6.90E+00 2.27E+01 WG W-9 277697004 5/5/2011 K-40 1.07E+02 1.54E+01 1.95E+01 WG W-9 277697004 5/5/2011 La-140 4.61E-01 2.94E+00 9.87E+00 WG W-9 277697004 5/5/2011 Mn-54 1.04E+00 6.50E-01 2.15E+00 WG W-9 277697004 5/5/2011 Nb-95 8.75E-01 8.13E-01 2.73E+00 WG W-9 277697004 5/5/2011 Ru-103 -1.25E+00 1.02E+00 2.97E+00 WG W-9 277697004 5/5/2011 Ru-106 -1.43E+00 5.86E+00 1.95E+01 WG W-9 277697004 5/5/2011 Sb-124 1.86E+00 1.85E+00 6.36E+00 WG W-9 277697004 5/5/2011 Sb-125 -4.66E-01 1.75E+00 5.62E+00 WG W-9 277697004 5/5/2011 Se-75 1.54E-01 9.83E-01 3.26E+00 WG W-9 277697004 5/5/2011 Th-228 2.75E+00 1.86E+00 4.55E+00 WG W-9 277697004 5/5/2011 Zn-65 -6.49E-01 1.56E+00 4.95E+00 WG W-9 277697004 5/5/2011 Zr-95 3.61E-01 1.40E+00 4.69E+00 WG W-1 283333001 8/1/2011 Ac-228 -7.51 E-02 3.34E+00 7.34E+00 WG W-1 283333001 8/1/2011 Ag-108m -7.39E-01 5.20E-01 1.52E+00 WG W-1 283333001 8/1/2011 Ag-1 I10m -8.49E-01 5.43E-01 1.60E+00 WG W-1 283333001 8/1/2011 Ba-140 6.25E-01 8.79E-01 3.01E+00 WG W-1 283333001 8/1/2011 Be-7 4.78E+00 5.01E+00 1.62E+01 WG W-1 283333001 8/1/2011 Ce- 141 1.08E+00 1.15E+00 3.39E+00 WG W-1 283333001 8/1/2011 Ce- 144 4.14E-01 3.52E+00 1.15E+01 WG W-1 283333001 8/1/2011 Co-57 1.17E-01 4.60E-01 1.56E+00 WG W-1 283333001 8/1/2011 Co-58 -1.76E+00 6.77E-01 1.55E+00 WG W-1 283333001 8/1/2011 Co-60 1.62E-01 7.92E-01 1.93E+00 WG W-1 283333001 8/1/2011 Cr-51 -3.27E+00 5.50E+00 1.76E+01 WG W-1 283333001 8/1/2011 Cs-134 9.52E-01 6.36E-01 2.09E+00 WG W-1 283333001 8/1/2011 Cs-137 6.24E-01 5.46E-01 1.83E+00 WG W-1 283333001 8/1/2011 Fe-59 -1.41E+00 1.16E+00 3.41E+00 WG W-1 283333001 8/1/2011 H-3 -2.04E+02 1.84E+02 6.38E+02 WG W-1 283333001 8/1/2011 1-131 -5.85E-01 1.23E+00 3.92E+00 WG W-1 283333001 8/1/2011 K-40 3.35E+01 1.1OE+01 1.32E+01 WG W-1 283333001 8/1/2011 La-140 6.25E-01 8.79E-01 3.01E+00 WG W-1 283333001 8/1/2011 Mn-54 -5.83E-01 6.93E-01 1.84E+00 WG W-1 283333001 8/1/2011 Nb-95 -7.57E-02 5.52E-01 1.83E+00 WG W-1 283333001 8/1/2011 Ru-103 -1.75E+00 7.41E-01 1.78E+00 WG W-1 283333001 8/1/2011 Ru-106 5.61E+00 4.74E+00 1.59E+01 WG W-1 283333001 8/1/2011 Sb-124 2.19E+00 1.47E+00 4.94E+00 WG W-1 283333001 8/1/2011 Sb-125 -1.12E+00 1.43E+00 4.45E+00 WG W-1 283333001 8/1/2011 Se-75 -5.63E-01 7.34E-01 2.35E+00 WG W-1 283333001 8/1/2011 Th-228 -9.64E-01 1.40E+00 3.77E+00 WG W-1 283333001 8/1/2011 Zn-65 1.56E-01 1.20E+00 3.41E+00 WG W-1 283333001 8/1/2011 Zr-95 -1.88E-02 9.77E-01 3.25E+-00 WG W-2 283333002 8/2/2011 Ac-228 -2.77E+00 4.95E+00 1.02E+01 WG W-2 283333002 8/2/2011 Ag-108m 5.20E-01 5.88E-01 1.95E+00 WG W-2 283333002 8/2/2011 Ag-110m 9.12E-01' 7.05E-01 2.11E+00 WG W-2 283333002 8/2/2011 Ba-140 2.25E+00 1.48E+00 4.86E+00 D-171

. Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-2 283333002 8/2/2011 Be-7 -4.57E+00 6.101E+00 1.93E+01 U WG W-2 283333002 8/2/2011 Ce- 141 3.47E-01 1.05E+00 3.5 11E+00 U WG W-2 283333002 8/2/2011 Ce- 144 4.09E+00 3.89E+00 1.29E+01 U WG W-2 283333002 8/2/2011 Co-57 6.20E-02 4.83E-01 1.63E+00 U WG W-2 283333002 8/2/2011 Co-58 -9.OOE-01 9.33E-01 2.35E+00 U WG W-2 283333002 8/2/2011 Co-60 1.56E+00 8.29E-01 2.70E+00 U WG W-2 283333002 8/2/2011 Cr-51 -5.04E+00 6.29E+00 2.06E+01 U WG W-2 283333002 8/2/2011 Cs-134 -2.63E-01 8.86E-01 2.91E+00 U WG W-2 283333002 8/2/2011 Cs-137 1.82E+00 1.72E+00 2.32E+00 U WG W-2 283333002 8/2/2011 Fe-59 -2.55E-01 1.59E+00 5.10E+00 U WG W-2 283333002 8/2/2011 H-3 -3.35E+02 1.76E+02 6.36E+02 U WG W-2 283333002 8/2/2011 1-131 8.01E-01 1.33E+00 4.48E+00 U WG W-2 283333002 8/2/2011 K-40 1.20E+01 1.43E+01 2.75E+01 U WG W-2 283333002 8/2/2011 La-140 2.25E+00 1.48E+00 4.86E+00 U WG W-2 283333002 8/2/2011 Mn-54 4.04E-01 7.36E-01 2.46E+00 U WG W-2 283333002 8/2/2011 Nb-95 7.42E-01 7.54E-01 2.53E+00 U WG W-2 283333002 8/2/2011 Ru-103 -1.06E+00 7.75E-01 2.30E+00 U WG W-2 283333002 8/2/2011 Ru-106 8.12E+00 6.49E+00 2.08E+01 U WG W-2 283333002 8/2/2011 Sb-124 -2.30E+00 2.63E+00 5.90E+00 U WG W-2 283333002 8/2/2011 Sb-125 2.79E+00 1.88E+00 6.08E+00 U WG W-2 283333002 8/2/2011 Se-75 5.91E-01 8.78E-01 2.82E+00 U WG W-2 283333002 8/2/2011 Th-228 1.17E+00 2.14E+00 3.611E+00 U WG W-2 283333002 8/2/2011 Zn-65 -7.38E-01 1.76E+00 4.74E+00 U WG W-2 283333002 8/2/2011 Zr-95 4.22E-01 1.24E+00 4.19E+00 U WG W-3 283333003 8/2/2011 Ac-228 -1.48E+00 3.02E+00 7.88E+00 U WG W-3 283333003 8/2/2011 Ag-108m 1.01E+00 5.48E-01 1.72E+00 U WG W-3 283333003 8/2/2011 Ag-I 10m -9.25E-01 5.89E-01 1.65E+00 U WG W-3 283333003 8/2/2011 Ba- 140 1.27E+00 1.02E+00 3.48E+00 U WG W-3 283333003 8/2/2011 Be-7 4.44E-01 4.87E+00 1.60E+01 U WG W-3 283333003 8/2/2011 Ce- 141 7.52E-01 1.13E+00 3.48E+00 U WG W-3 283333003 8/2/2011 Ce- 144 5.08E-01 3.80E+00 1.24E+01 U WG W-3 283333003 8/2/2011 Co-57 -8.94E-01 5.45E-01 1.59E+00 U WG W-3 283333003 8/2/2011 Co-58 -4.90E-01 5.78E-01 1.84E+00 U WG W-3. 283333003 8/2/2011 Co-60 5.08E-01 6.03E-01 2.00E+00 U WG W-3 283333003 8/2/2011 Cr-51 -7.30E+00 6.85E+00 1.77E+01 U WG W-3 283333003 8/2/2011 Cs-134 3.67E-01 6.15E-01 2.09E+00 U WG W-3 283333003 8/2/2011 Cs-137 9.44E-01 6.OOE-01 1.91E+00 U WG W-3 283333003 8/2/2011 Fe-59 -1.06E+00 1.16E+00 3.55E+00 U WG W-3 283333003 8/2/2011 H-3 -8.97E+01 1.84E+02 6.20E+02 U WG W-3 283333003 8/2/2011 1-131 -5.49E-01 1.12E+00 3.64E+00 U WG W-3 283333003 8/2/2011 K-40 3.08E+01 1.24E+01 1.65E+01 WG W-3 283333003 8/2/2011 La- 140 1.27E+00 1.02E+00 3.48E+00 U WG W-3 283333003 8/2/2011 Mn-54 -6.45E-01 5.58E-01 1.72E+00 U WG W-3 283333003 8/2/2011 Nb-95 -4.73E-01 5.93E-01 1.91E+00 U WG W-3 283333003 8/2/2011 Ru- 103 -7.95E-01 6.36E-01 1.91E+00 U WG W-3 283333003 8/2/2011 Ru- 106 3.73E+00 5.39E+00 1.76E+01 U WG W-3 283333003 8/2/2011 Sb-124 -1.46E+00 1.37E+00 4.12E+00 U WG W-3 283333003 8/2/2011 Sb-125 1.60E+00 1.51E+00 4.98E+00 U WG W-3 283333003 8/2/2011 Se-75 1.47E+00 8.62E-01 2.77E+00 U WG W-3 283333003 8/2/2011 Th-228 1.34E+00 1.79E+00 4.011E+00 U WG W-3 283333003 8/2/2011 Zn-65 -1.25E+00 1.16E+00 3.48E+00 U D-172

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-3 283333003 8/2/2011 Zr-95 5.55E-01 9.95E-01 3.39E+00 WG W-4 283333004 8/3/2011 Ac-228 -8.86E+00 4.45E+00 8.54E+00 WG W-4 283333004 8/3/2011 Ag-108m -5.30E-01 5.98E-01 1.89E+00 WG W-4 283333004 8/3/2011 Ag-110m -5.33E-01 6.22E-01 1.92E+00 WG W-4 283333004 8/3/2011 Ba-140 -1.23E+00 1.23E+00 3.67E+00 WG W-4 283333004 8/3/2011 Be-7 4.89E+00 5.75E+00 1.89E+01 WG W-4 283333004 8/3/2011 Ce-141 8.40E-01 1.35E+00 4.01E+00 WG W-4 283333004 8/3/2011 Ce-144 -1.64E+00 4.56E+00 1.41E+01 WG W-4 283333004 8/3/2011 Co-57 -6.87E-01 5.90E-01 1.80E+00 WG W-4 283333004 8/3/2011 Co-58 7.80E-01 6.15E-01 2.06E+00 WG W-4 283333004 8/3/2011 Co-60 1.22E+00 7.82E-01 2.56E+00 WG W-4 283333004 8/3/2011 Cr-51 -4.67E+00 6.35E+00 2.05E+01 WG W-4 283333004 8/3/2011 Cs-134 -5.96E-01 1.07E+00 2.72E+00 WG W-4 283333004 8/3/2011 Cs-137 1.71E-01 6.91E-0I 2.26E+00 WG W-4 283333004 8/3/2011 Fe-59 2.OOE+00 1.44E+00 4.77E+00 WG W-4 283333004 8/3/2011 H-3 9.57E+02 2.5 1E+02 6.29E+02 WG W-4 283333004 8/3/2011 1-131 7.35E-01 1.25E+00 4.16E+00 WG W-4 283333004 8/3/2011 K-40 7.65E+00 1.55E+01 2.29E+01 WG W-4 283333004 8/3/2011 La-140 -1.23E+00 1.22E+00 3.67E+00 WG W-4 283333004 8/3/2011 Mn-54 -2.50E-01 6.05E-01 1.99E+00 WG W-4 283333004 8/3/2011 Nb-95 -8.31E-01 7.01E-01 2.08E+00 WG W-4 283333004 8/3/2011 Ru-I103 3.82E+00 1.07E+00 2.21E+00 WG W-4 283333004 8/3/2011 Ru-I106 -7.84E+00 6.36E+00 1.90E+01 WG W-4 283333004 8/3/2011 Sb-124 2.57E-01 1.69E+00 5.5 1E+00 WG W-4 283333004 8/3/2011 Sb-125 1.80E+00 1.77E+00 5.81E+00 WG W-4 283333004 8/3/2011 Se-75 7.98E-01 9.03E-01 3.01E+00 WG W-4 283333004 8/3/2011 Th-228 7.04E-01 1.89E+00 4.38E+00 WG W-4 283333004 8/3/2011 Zn-65 -6.28E+00 2.OOE+00 3.58E+00 WG W-4 283333004 8/3/2011 Zr-95 3.12E+00 1.37E+00 4.07E+00 WG W-5 283333005 8/3/2011 Ac-228 -1.02E+01 5.60E+00 1.12E+01 WG W-5 283333005 8/3/2011 Ag-108m -3.70E-01 6.34E-01 2.05E+00 WG W-5 283333005 8/3/2011 Ag-110m 5.07E-01 7.72E-01 2.51E+00 WG W-5 283333005 8/3/2011 Ba-140 -4.74E-01 1.20E+00 3.84E+00 WG *W-5 283333005 8/3/2011 Be-7 -3.12E+00 6.41E+00 2.06E+01 WG W-5 283333005 8/3/2011 Ce-141 2.37E+00 1.17E+00 3.55E+00 WG W-5 283333005 8/3/2011 Ce-144 -2.05E-01 3.69E+00 1.23E+01 WG W-5 283333005 8/3/2011 Co-57 -4.28E-02 4.61E-01 1.54E+00 WG W-5 283333005 8/3/2011 Co-58 -6.45E-01 7.55E-01 2.38E+00 WG W-5 283333005 8/3/2011 Co-60 3.94E-01 8.88E-01 3.02E+00 WG W-5 283333005 8/3/2011 Cr-51 2.73E+00 6.35E+00 2.16E+01 WG W-5 283333005 8/3/2011 Cs-134 9.71E-0I 9.78E-01 3.29E+00 WG W-5_ 283333005 8/3/2011 Cs-137 -1.95E+00 1.25E+00 2.44E+00 WG W-5 283333005 8/3/2011 Fe-59 1.67E+00 1.85E+00 6.11E+00 WG W-5 283333005 8/3/2011 H-3 7.71E+02 2.38E+02 6.28E+02 WG W-5 283333005 8/3/2011 1-131 8.63E-01 1.25E+00 4.22E+00 WG W-5 283333005 8/3/2011 K-40 2.22E+00 1.17E+01 2.60E+01 WG W-5 283333005 8/3/2011 La-140 -4.74E-01 1.20E+00 3.84E+00 WG W-5 283333005 8/3/2011 Mn-54 -3.21E-01 7.88E-01 2.57E+00 WG W-5 283333005 8/3/2011 Nb-95 1.64E+00 9.22E-01 2.98E+00 WG W-5 283333005 8/3/2011 Ru-103 -1.95E+00 9.54E-01 2.53E+00 WG W-5 283333005 8/3/2011 Ru-106 -1.12E+01 7.42E+00 2.10E+01 D-173

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-5 283333005 8/3/2011 - Sb-124 1.69E+00 2.03E+00 6.85E+00 U WG W-5 283333005 8/3/2011 Sb-125 1.30E+00 1.94E+00 6.47E+00 U WG W-5 283333005 8/3/2011 Se-75 -2.74E-01 9.12E-01 2.88E+00 U WG W-5 283333005 8/3/2011 Th-228 -2.18E+00 2.03E+00 4.87E+00 U WG W-5 283333005 8/3/2011 Zn-65 -1.27E+00 1.77E+00 5.48E+00 U WG W-5 283333005 8/3/2011 Zr-95 8.46E-01 1.4]E+00 4.78E+00 U WG W-6 283333006 8/3/2011 Ac-228 -3.68E-01 3.23E+00 8.44E+00 U WG W-6 283333006 8/3/2011 Ag-108m -4.21E-01 5.20E-01 1.68E+00 U WG W-6 283333006 8/3/2011 Ag-Il0m 3.61E-01 6.18E-01 2.05E+00 U WG W-6 283333006 8/3/2011 Ba- 140 -5.90E+00 2.52E+00 3.27E+00 U WG W-6 283333006 8/3/2011 Be-7 -3.84E-01 5.19E+00 1.73E+01 U WG W-6 283333006 8/3/2011 Ce- 141 4.78E-01 1.1OE+00 3.63E+00 U WG W-6 283333006 8/3/2011 Ce- 144 2.06E+00 4.1OE+00 S1.36E+01 U WG W-6 283333006 8/3/2011 Co-57 3.87E-01 5.36E-01 1.78E+00 U WG W-6 283333006 8/3/2011 Co-58 -2.63E-01 6.76E-01 2.17E+00 U WG W-6 283333006 8/3/2011 Co-60 -5.68E-01 7.1OE-01 2.24E+00 U WG W-6 283333006 8/3/2011 Cr-51 -8.81E-01 6.14E-+00 1.97E+01 U WG W-6 283333006 8/3/2011 Cs-134 -4.64E-01 7.69E-01 2.43E+00 U WG W-6 283333006 8/3/2011 Cs-137 1.11E+00 7.12E-01 2.29E+00 U WG W-6 283333006 8/3/2011 Fe-59 -6.90E-02 1.29E+00 4.32E+00 U WG W-6 283333006 8/3/2011 H-3 5.34E+02 2.22E+02 6.3 1E+02 U WG W-6 283333006 8/3/2011 1-131 -7.57E-01 1.21E+00 3.76E+00 U WG W-6 283333006 8/3/2011 K-40 4.19E-01 1.34E+01 2.41E+01 WG W-6 283333006 8/3/2011 La-140 -5.90E+00 2.5 1E+00 3.27E+00 U WG W-6 283333006 8/3/2011 Mn-54 -2.07E-01 6.66E-01 2.14E+00 U WG W-6 283333006 8/3/2011 Nb-95 2.48E-01 6.26E-01 2.07E+00 U WG W-6 283333006 8/3/2011 Ru-103 2.16E-01 6.63E-01 2.23E+00 U WG W-6 283333006 8/3/2011 Ru-106 2.25E+00 5.74E+00 1.91E+01 U WG W-6 283333006 8/3/2011 Sb-124 -7.50E-01 1.76E+00 5.60E+00 U WG W-6 283333006 8/3/2011 Sb-125 4.26E-01 1.65E+00 5.56E+00 U WG W-6 283333006 8/3/2011 Se-75 1.75E-02 8.55E-01 2.78E+00 U WG W-6 283333006 8/3/2011 Th-228 6.72E-02 2.14E+00 4.06E+00 U WG W-6 283333006 8/3/2011 Zn-65 1.40E+00 1.81E+00 4.26E+00 U WG W-6 283333006 8/3/2011 Zr-95 2.19E+00 1.20E+00 3.79E+00 U WG W-7 283333007 8/1/2011 Ac-228 -1.40E+00 3.35E+00 8.14E+00 U WG W-7 283333007 8/1/2011 Ag-108m 1.17E-01 4.97E-01 1.67E+00 U WG W-7 283333007 8/1/2011 Ag-Il0m -7.28E-01 5.48E-01 1.59E+00 U WG W-7 283333007 8/1/2011 Ba- 140 5.47E-01 1.21E+00 4.09E+00 U WG W-7 283333007 8/1/2011 Be-7 -7.28E+00 5.29E+00 1.58E+01 U WG W-7 283333007 8/1/2011 Ce- 141 1.70E+00 1.18E+00 3.80E+00 U WG W-7 283333007 8/1/2011 Ce- 144 -7.65E+00 4.23E+00 1.23E+01 U WG W-7 283333007 8/1/2011 Co-57 -2.34E-01 5.17E-01 1.71E+00 U WG W-7 283333007 8/1/2011 Co-58 5.72E-01 5.70E-01 1.93E+00 U WG W-7 283333007 8/1/2011 Co-60 3.14E-01 6.21E-01 2.04E+00 U WG W-7 283333007 8/1/2011 Cr-51 -2.36E+00 5.67E+00 1.90E+01 U WG W-7 283333007 8/1/2011 Cs-134 3.86E-02 6.46E-01 2.18E+00 U WG W-7 283333007 8/1/2011 Cs-137 1.42E-01 5.92E-01 1.93E+00 U WG W-7 283333007 8/1/2011 Fe-59 -1.47E+00 1.20E+00 3.52E+00 U WG W-7 283333007 8/1/2011 H-3 5.56E+01 1.95E+02 6.34E+02 U WG W-7 283333007 8/1/2011 1-131 1.13E+00 1.38E+00 4.64E+00 U WG W-7 283333007 8/1/2011 K-40 2.27E+00 1.09E+01 3.04E+01 U D-174

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-7 283333007 8/1/2011 La-140 5.47E-01 1.2]E+00 4.09E+00 U WG W-7 283333007 8/1/2011 Mn-54 3.52E-01 5.69E-01 1.93E+00 U WG W-7 283333007 8/1/2011 Nb-95 1.86E+00 7.49E-01 2.25E+00 U WG W-7 283333007 8/1/2011 Ru-103. -7.23E-01 6.80E-01 2.1OE+00 U WG W-7 283333007 8/1/2011 Ru-106 7.19E+00 5.48E+00 1.77E+01 U WG W-7 283333007 8/1/2011 Sb-124 -1.44E+00 1.52E+00 4.63E+00 U WG W-7 283333007 8/1/2011 Sb-125 1.17E+00 1.60E+00 5.37E+00 U WG W-7 283333007 8/1/2011 Se-75 5.35E-01 7.86E-01 2.53E+00 U WG W-7 283333007 8/1/2011 Th-228 1.91E+00 1.94E+00 4.07E+00 U WG W-7 283333007 8/1/2011 Zn-65 1.59E+00 1.39E+00 4.09E+00 U WG W-7 283333007 8/1/2011 Zr-95 -6.36E-01 1.06E+00 3.47E+00 U WG W-8 283333008 8/2/2011 Ac-228 -1.10E+01 5.92E+00 1.22E+01 U

- WG W-8 283333008 8/2/2011 Ag-108m -5.37E-01 5.82E-01 1.83E+00 U WG W-8 283333008 8/2/2011 Ag-110m -4.08E-02 7.80E-01 2.50E+00 U WG W-8 283333008 8/2/2011 Ba-140 8.16E-01 1.72E+00 5.77E+00 U WG W-8 283333008 8/2/2011 Be-7 6.59E+00 6.87E+00 2.26E+01 U WG W-8 283333008 8/2/2011 Ce- 141 -1.38E+00 1.13E+00 3.49E+00 U WG W-8 283333008 8/2/2011 Ce- 144 -5.05E-01 3.70E+00 1.23E+01 U WG W-8 283333008 8/2/2011 Co-57 -7.49E-02 4.75E-01 1.58E+00 U WG W-8 283333008 8/2/2011 Co-58 -5.58E-01 8.80E-01 2.84E+00 U WG W-8 283333008 8/2/2011 Co-60 3.22E-01 7.93E-01 2.70E+00 U WG W-8 283333008 8/2/2011 Cr-51 -2.11E+00 6.61E+00 2.21E+01 U WG W-8 283333008 8/2/2011 Cs-134 -1.39E+00 1.05E+00 3.16E+00 U WG W-8 283333008 8/2/2011 Cs-137 -6.29E-01 1.21E+00 2.73E+00 U WG .W-8 283333008 8/2/2011 Fe-59 6.62E-01 1.98E+00 6.5 1E+00 U WG W-8 283333008 8/2/2011 H-3 -9.11E+01 .1.87E+02 6.29E+02 U WG W-8 283333008 8/2/201,1 1-131 -2.13E-01 1.41E+00 4.70E+00 U WG W-8 283333008 8/2/2011 K-40 2.94E+01 1.47E+01 4.22E+01 U WG W-8 283333008 8/2/2011 La-140 8.16E-01 1.72E+00 5.77E+00 U WG W-8 283333008 8/2/2011 Mn-54 -1.56E+00 8.71E-01 2.43E+00 U WG W-8 283333008 8/2/2011 Nb-95 1.25E+00 8.48E-01 2.81E+06 U WG W-8 283333008 8/2/2011 Ru-103 -2.57E+00 1.03E+00 2.43E+00 U WG W-8 283333008 8/2/2011 Ru-106 -6.39E+00 7.10E+00 2.16E+01 U WG W-8 283333008 8/2/2011 Sb-124 -1.21E+00 2.15E+00 6.74E+00 U WG W-8 283333008 8/2/2011 Sb-125 1.50E+00 1.88E+00 6.26E+00 U WG W-8 283333008 8/2/2011 Se-75 2.03E+00 1.03E+00 3.07E+00 U WG W-8 283333008 8/2/2011 Th-228 -2.10E+00 2.05E+00 4.93E+00 U WG W-8 283333008 8/2/2011 Zn-65 -7.03E-01 1.86E+00 5.91E+00 U WG W-8 283333008 8/2/2011 Zr-95 1.48E+00 1.51E+00 5.09E+00 U WG W-9 283333009 8/1/2011 Ac-228 -3.87E+00 3.44E+00 8.34E+00 U WG W-9 283333009 8/1/2011 Ag-108m -4.17E-01 5.44E-01 1.76E+00 U WG W-9 283333009 8/1/2011 Ag-110m -8.85E-01 6.38E-01 1.90E+00 U WG W-9 283333009 8/1/2011 Ba- 140 -6.19E+00 2.92E+00 4.5 1E+00 U WG W-9 283333009 8/1/2011 Be-7 1.25E+01 6.16E+00 1.92E+01 U WG W-9 283333009 8/1/2011 Ce-141 1.52E+00 1.23E+00 3.84E+00 U WG W-9 283333009 8/1/2011 Ce-144 -2.63E+00 4.09E+00 1.28E+01 U WG W-9 283333009 8/1/2011 Co-57 -2.56E-01 5.35E-01 1.75E+00 U WG W-9 283333009 8/1/2011 Co-58 -4.60E-01 6.54E-01 2.05E+00 U WG W-9 283333009 8/1/2011 Co-60 4.22E-01 7.39E-01 2.49E+00 U WG W-9 283333009 8/1/2011 Cr-51 -4.01E+00 6.45E+00 2.02E+01 U WG W-9 283333009 8/1/2011 Cs-134 1.96E-01 7.33E-01 2.41E+00 U D-175

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-9 283333009 8/1/2011 Cs-137 -7.34E-03 6.84E-01 2.26E+00 U WG W-9 283333009 8/1/2011 Fe-59 -1.36E+00 1.42E+00 4.48E+00 U WG W-9 283333009 8/1/2011 H-3 -1.95E+01 1.92E+02 6.35E+02 U WG W-9 283333009 8/1/2011 1-131 7.83E-01 1.46E+00 4.70E+00 U WG W-9 283333009 8/1/2011 K-40 1.36E+02 1.70E+01 1.98E+01 WG W-9 283333009 8/1/2011 La-140 -6.19E+00 2.91E+00 4.5 1E+00 U WG W-9 283333009 8/1/2011 Mn-54 -4.19E-01 6.37E-01 2.00E+00 U WG W-9 283333009 8/1/2011 Nb-95 -1.00E+00 7.35E-01 2.17E+00 U WG W-9 283333009 8/1/2011 Ru-103 -9.57E-01 7.16E-01 2.18E+00 U WG W-9 283333009 8/1/2011 Ru'106 -1.96E+00 5.73E+00 1.87E+01 U WG W-9 283333009 8/1/2011 Sb-124 -3.1IE-01 1.67E+00 5.40E+00 U WG W-9 283333009 8/1/2011 Sb-125 1.72E+00 1.71E+00 5.72E+00 U WG W-9 283333009 8/1/2011 Se-75 1.79E-01 8.72E-01 2.84E+00 U WG W-9 283333009 8/1/2011 Th-228 2.23E-01 1.76E+00 4.OOE+00 U WG W-9 283333009 8/1/2011 Zn-65 -2.49E+00 1.91E+00 4.43E+00 U WG W-9 283333009 8/1/2011 Zr-95 -7.78E-01 1.20E+00 3.81E+00 U WG W-10 283333010 8/1/2011 Ac-228 2.34E-01 2.98E+00 8.01E+00 U WG W-10 283333010 8/1/2011 Ag-108m -2.61E-02 4.78E-01 1.56E+00 u, WG W-10 283333010 8/1/2011 Ag-110m -4.66E-01 5.28E-01 1.69E+00 U WG W-10 283333010 8/1/2011 Ba- 140 7.23E-01 1.07E+00 3.60E+00 U WG W-10 283333010 8/1/2011 Be-7 3.86E+00 4.87E+00 1.59E+01 U WG W-10 283333010 8/1/2011 Ce-141 -3.02E+00 1.32E+00 3.41E+00 U WG W-10 283333010 8/1/2011 Ce- 144 -8.20E-01 3.82E+00 1.22E+01 U WG W-10 283333010 8/1/2011 Co-57 -1.39E+00 5.91E-01 1.51E+00 U WG W-10 283333010 8/1/2011 Co-58 -5.60E-01 5.52E-01 1.71E+00 U WG W-10 283333010 8/1/2011 Co-60 -1.93E+00 1.01E+00 2.26E+00 U WG W-10 283333010 8/1/2011 Cr-51 -8.43E+00 6.01E+00 1.82E+01 U WG W-10 283333010 8/1/2011 Cs- 134 -2.92E-01 6.06E-01 1.97E+00 U WG W-10 283333010 8/1/2011 Cs-137 -1.20E-01 7.38E-01 2.06E+00 U WG W-10 283333010 8/1/2011 Fe-59 6.19E-01 1.13E+00 3.74E+00 U WG W-10 283333010 8/1/2011 H-3 -2.21E+02 1.81E+02 6.30E+02 U WG W-10 283333010 8/1/2011 1-131 2.33E-02 1.33E+00 4.39E+00 U WG W-10 283333010 8/1/2011 K-40 1.50E+00 9.48E+00 2.42E+01 U WG W-10 283333010 8/1/2011 La- 140 7.23E-01 1.07E+00 3.60E+00 U WG W-10 283333010 8/1/2011 Mn-54 -7.24E-01 5.40E-01 1.61E+00 U WG W-10 283333010 8/1/2011 Nb-95 2.79E-01 5.49E-01 1.85E+00 U WG W-10 283333010 8/1/2011 Ru-103 -9.37E-01 6.68E-01 1.95E+00 U WG W-10 283333010 8/1/2011 Ru-106 -1.80E+00 4.88E+00 1.62E+01 U WG W-10 283333010 8/1/2011 Sb-124 2.16E+00 1.37E+00 4.57E+00 U WG W-10 283333010 8/1/2011 Sb-125 2.72E-01 1.48E+00 4.85E+00 U WG W-10 283333010 8/1/2011 Se-75 -3.18E-02 7.30E-01 2.44E+00 U WG W-10 283333010 8/1/2011 Th-228 5.87E-02 1.59E+00 3.86E+00 U WG W-10 283333010 8/1/2011 Zn-65 -1.22E+00 1.20E+00 3.63E+00 U WG W-10 283333010 8/1/2011 Zr-95 9.60E-01 1.03E+00 3.46E+00 U WG W-1I 283333011 8/1/2011 Ac-228 -4.77E+00 3.71E+00 8.75E+00 U WG W-1I 283333011 8/1/2011 Ag-108m -6.50E-01 5.29E-01 1.65E+00 U WG W-1I 283333011 8/1/2011 Ag-110m -2.42E-01 5.63E-01 1.81E+00 U WG W-1I 283333011 8/1/2011 Ba-140 2.44E-01 1.26E+00 4.23E+00 U WG W-1I 283333011 8/1/2011 Be-7 -2.46E-02 5.28E+00 1.76E+01 U WG W-1I 283333011 8/1/2011 Ce-141 2.34E+00 1.30E+00 3.92E+00 U WG W1-I 283333011 8/1/2011 Ce-144 1.70E+00 4.05E+00 1.36E+01 U D-176

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-l1 283333011 8/1/2011 Co-57 3.38E-01 5.30E-01 1.78E+00 U WG W-1l 283333011 8/1/2011 Co-58 2.28E-01 1.12E+00 2.02E+00 U WG W-1l 283333011 8/1/2011 Co-60 4.95E-01 5.93E-01 1.97E+00 U WG W-l1 283333011 8/1/2011 Cr-51 -9.63E-01 6.36E+00 2.04E+01 U WG W-1l 283333011 8/1/2011 Cs-134 -1.57E-01 7.68E-01 2.46E+00 U WG W-11 283333011 8/1/2011 Cs-137 5.54E-01 6.23E-01 2.04E+00 U WG W-11 283333011 8/1/2011 Fe-59 5.36E-01 1.29E+00 4.30E+00 U WG W-11 283333011 8/1/2011 H-3 -1.30E+02 1.86E+02 6.32E+02 U WG W-I1 283333011 8/1/2011 1-131 -1.03E+00 1.42E+00 4.67E+00 U WG W-1I 283333011 8/1/2011 K-40 8.05E+00 1.20E+01 1.97E+01 U WG W-1I 283333011 8/1/2011 La-140 2.44E-01 1.26E+00 4.23E+00 U WG W-11 283333011 8/1/2011 Mn-54 -8.97E-02 5.53E-01 1.85E+00 U WG W-11 283333011 8/1/2011 Nb-95 9.52E-01 6.99E-01 2.23E+00 U WG W-11 283333011 8/1/2011 Ru-103 -1.45E-01 6.84E-01 2.26E+00 U WG W-l1 283333011 8/1/2011 Ru-106 3.20E-01 5.21 E+00 1.71E+01 U WG W-1 283333011 8/1/2011 Sb-124 -7.95E-01 1.44E+00 4.63E+00 U WG W-I1 283333011 8/1/2011 Sb-125 4.20E-01 1.63E+00 5.48E+00 U WG W-11 283333011 8/1/2011 Se-75 3.OOE+00 1.09E+00 2.89E+00 UI WG W-1l 283333011 8/1/2011 Th-228 2.44E+00 2.06E+00 4.46E+00 U WG W-11 283333011 8/1/2011 Zn-65 1.52E+00 1.50E+00 4.34E+00 U WG W-11 283333011 8/1/2011 Zr-95 -5.29E-01 1.18E+00 3.74E+00 U WG W-12 283333012 8/1/2011 Ac-228 5.49E+00 4.36E+00 1.09E+01 U WG W-12 283333012 8/1/2011 Ag-108m 2.41E-01 6.74E-01 2.19E+00 U WG W-12 283333012 8/1/2011 Ag-110m -5.67E-01 6.85E-01 2.16E+00 U WG W-12 283333012 8/1/2011 Ba-140 -1.70E-01 1.37E+00 4.55E+00 U WG W-12 283333012 8/1/2011 Be-7 -1.99E+00 6.53E+00 2.07E+01 U WG W-12 283333012 8/1/2011 Ce-141 -4.16E-01 1.42E+00 4.52E+00 U WG W-12 283333012 8/1/2011 Ce-144 -1.63E-01 5.16E+00 1.66E+01 U WG W-12 283333012 8/1/2011 Co-57 -7.71E-03 6.48E-01 2.1OE+00 U WG W-12 283333012 8/1/2011 Co-58 -4.12E-01 7.34E-01 2.32E+00 U WG W-12 283333012 8/1/2011 Co-60 2.82E-01 8.34E-01 2.76E+00 U WG W-12 283333012 8/1/2011 Cr-51 -2.76E+00 7.40E+00 2.41E+01 U

.WG W-12 283333012 8/1/2011 Cs-134 1.45E+00 8.98E-01 2.89E+00 U WG W-12 283333012 8/1/2011 Cs-137 1:69E+00 8.42E-01 2.64E+00 U WG W-12 283333012 8/1/2011 Fe-59 9.26E-01 1.46E+00 4.94E+00 U WG W-12 283333012 8/1/2011 H-3 1.03E+02 1.56E+02 4.95E+02 U WG W-12 283333012 8/1/2011 1-131 -1.20E+00 1.48E+00 4.64E+00 U WG W-12 283333012 8/1/2011 K-40 -1.24E+01 1.43E+01 3.09E+01 U WG W-12 283333012 8/1/2011 La-140 -1.70E-01 1.37E+00 4.55E+00 U WG W-12 283333012 8/1/2011 Mn-54 -2.39E-01 6.87EL01 2.19E+00 U WG W-12 283333012 8/1/2011 Nb-95 9.11E-01 7.91E-01 2.59E+00 U WG W-12 283333012 8/1/2011 Ru-I103 -5.33E-01 7.87E-01 2.57E+00 U WG W-12 283333012 8/1/2011 Ru-106 -8.12E+00 6.84E+00 2.1OE+01 U WG W-12 283333012 8/1/2011 Sb- 124 2.12E+00 1.75E+00 6.OOE+00 U WG W-12 283333012 8/1/2011 Sb-125 1.1OE+00 2.05E+00 6.64E+00 U WG W-12 283333012 8/1/2011 Se-75 5.27E-01 1.04E+00 3.47E+00 U WG W-12 283333012 8/1/2011 Th-228 2.68E-01 2.13E+00 5.18E+00 U WG W-12 283333012 8/1/2011 Zn-65 -1.12E+00 1.65E+00 4.42E+00 U WG W-12 283333012 8/1/2011 Zr-95 9.84E-01 1.28E+00 4.25E+00 U WG W-13 283333013 8/1/2011 Ac-228 1.18E+00 3.67E+00 9.78E+00 U WG W-13 283333013 8/1/2011 Ag-108m -1. 16E+00 6.41E-01 1.80E+00 U D-177

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-13 283333013 8/1/2011 Ag-i 10m -1.00E+00 6.30E-01 1.86E+00 U WG W-13 283333013 8/1/2011 Ba- 140 -7.70E-01 1.22E+00 3.84E+00 U WG W-13 283333013 8/1/2011 Be-7 7.27E+00 5.95E+00 1.92E+01 U WG W-13 283333013 8/1/2011 Ce-I141 -1.88E+00 1.79E+00 4.42E+00 U WG W-13 283333013 8/1/2011 Ce- 144 -4.85E+00 4.97E+00 1.55E+01 U WG W-13 283333013 8/1/2011 Co-57 -5.76E-01 6.33E-01 2.00E+00 U WG W-13 283333013 8/1/2011 Co-58 -2.70E-01 6.54E-01 2.13E+00 U WG W-13 283333013 8/1/2011 Co-60 7.65E-01 7.18E-01 2.43E+00 U WG. W-13 283333013 8/1/2011 Cr-51 2.90E+00 6.50E+00 2.18E+01 U WG W-13 283333013 8/1/2011 Cs-134 1.34E+00 8.28E-01 2.70E+00 U WG W-13 283333013 8/1/2011 Cs-137 4.24E-0 1 6.38E-01 2.17E+00 U WG W-13 283333013 8/1/2011 Fe-59 -1.45E+00 1.49E+00 4.49E+00 U WG W-13 283333013 8/1/2011 H-3 1.78E+01 1.53E+02 5.01E+02 U WG W-13 2833 3 3013 8/1/2011 1-131 -2.29E+00 1.3913+00 4.04E+00 U WG W-13 283333013 8/1/2011 K-40 -5.23E+00 1.21E+01 2.99E+01 U WG W-13 283333013 8/1/2011 La-140 -7.70E-01 1.22E+00 3.84E+00 U WG W-13 283333013 8/1/2011 Mn-54 -2.84E-01 6.41E-01 2.08E+00 U WG W-13 283333013 8/1/2011 Nb-95 4.71E-01 6.62E-01 2.22E+00 U WG W-13 283333013 8/1/2011 Ru-103 -1.90E-01 7.54E-01 2.43E+00 U WG W-13 283333013 8/1/2011 Ru- 106 -1.63E+00 5.66E+00 1.89E+01 U WG W-13 283333013 8/1/2011 Sb-124 -4.19E-01 1.55E+00 4.97E+00 U WG W-13 283333013 8/1/2011 Sb-125 -2.71E+00 1.91E+00 5.68E+00 U WG W-13 283333013 8/1/2011 Se-75 3.96E-01 8.98E-01 3.04E+00 U WG W-13 283333013 8/1/2011 Th-228 -3.35E+00 2.25E+00 4.46E+00 U WG W-13 283333013 8/1/2011 Zn-65 -6.17E+00 2.55E+00 4.5 11E+00 U WG W-13 283333013 8/1/2011 Zr-95 -1.01E+00 1.20E+00 3.81E+00 U WG W-14 283333014 8/1/2011 Ac-228 8.86E-01 3.29E+00 8.85E+00 U WG W-14 283333014 8/1/2011 Ag-108m -1.19E+00 6.63E-01 1.56E+00 U WG W-14 283333014 8/1/2011 Ag-110m 5.71E-01 5.36E-01 1.76E+00 U WG W-14 283333014 8/1/2011 Ba-140 -5.58E-01 1.06E+00 3.40E+00 U WG W-14 283333014 8/1/2011 Be-7 1.70E+00 5.03E+00 1.69E+01 U WG W-14 283333014 8/1/2011 Ce- 141 -4.16E+00 1.66E+00 3.29E+00 U WG W-14 283333014 8/1/2011 Ce- 144 3.66E+00 3.64E+00 1.21E+01 U WG W-14 283333014 8/1/2011 Co-57 1.38E-01 4.66E-01 .1.58E+00 U WG W-14 283333014 8/1/2011 Co-58 -4.64E-01 5.48E-01 1.75E+00 U WG W-14 283333014 8/1/2011 Co-60 4.86E-01 .6.72E-01 2.22E+00 U WG W-14 283333014 8/1/2011 Cr-51 7.44E-01 5.53E+00 1.77E+01 U WG W-14 283333014 8/1/2011 Cs-134 -9.22E-01 7.50E-01 2.17E+00 U WG W-14 283333014 8/1/2011 Cs-137 5.70E-01 5.79E-01 1.90E+00 U WG W-14 283333014 8/1/2011 Fe-59 2.60E-01 1.23E+00 4.08E+00 U WG W-14 283333014 8/1/2011 H-3 1.52E+02 1.56E+02 4.83E+02 U WG W-14 283333014 8/1/2011 1-131 -3.10tE-01 1.05E+00 3.54E+00 U WG W-14 283333014 8/1/2011 K-40 4.04E+01 1.20E+01 1.81E+01 UI WG W-14 283333014 8/1/2011 La-140 -5.58E-01 1.06E+00 3.40E+00 U WG W-14 283333014 8/1/2011 Mn-54 -1.40E-01 5.08E-01 1.69E+00 U WG W-14 283333014 8/1/2011 Nb-95 -6.51E-01 8.45E-01 2.00E+00 U WG W-14 283333014 8/1/2011 Ru- 103 5.85E-01 6.52E-01 1.93E+00 U WG W-14 283333014 8/1/2011 Ru-106 8.16E+00 5.43E+00 1.75E+01 U WG W-14 283333014 8/1/2011 Sb-124 -4.89E-01 1.36E+00 4.40E+00 U WG W-14 283333014 8/1/2011 Sb-125 -5.46E-01 1.48E+00 4.90E+00 U WG W-14 283333014 8/1/2011 Se-75 4.47E-02 7.41E-01 2.40E+00 U D-178

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-14 283333014 8/1/2011 Th-228 -2.41E+00 1.50E+00 3.86E+00 U WG W-14 283333014 8/1/2011 Zn-65 -1.23E+00 1.49E+00 3.95E+00 U WG W-14 283333014 8/1/2011 Zr-95 2.28E+00 1.12E+00 3.47E+00 U WG W-15 283333015 8/2/2011 Ac-228 -3.11E+00 3.38E+00 8.15E+00 U WG W-15 283333015 8/2/2011 Ag-108m 2.41E-01 5.34E-01 1.76E+00 U WG W-15 283333015 8/2/2011 Ag-110m -2.10E-01 5.86E-01 1.93E+00 U WG W-15 283333015 8/2/2011 Ba- 140 1.94E+00 1.14E+00 3.73E+00 U WG W-15 283333015 8/2/2011 Be-7 -9.13E+00 6.14E+00 1.78E+01 U WG W-15 283333015 8/2/2011 Ce- 141 2.78E+00 1.89E+00 3.63E+00 U WG W-15 283333015 8/2/2011 Ce-i144 -5.18E+00 4.30E+00 1.32E+01 U WG W-15 283333015 8/2/2011 Co-57 2.26E-01 5.47E-01 1.80E+00 U WG W-15 283333015 8/2/2011 Co-58 2.34E-01 6.60E-01 2.19E+00 U WG W-15 283333015 8/2/2011 Co-60 1.27E+00 6.87E-01 2.24E+00 U WG W-15 283333015 8/2/2011 Cr-5I 1.20E+00 5.96E+00 1.99E+01 U WG W-15 283333015 8/2/2011 Cs-134 -1.04E+00 1.12E+00 2.41E+00 U WG W-15 283333015 8/2/2011 Cs-137 -8.73E-01 9.16E-01 2.26E+00 U WG W-15 283333015 8/2/2011 Fe-59 -2.15E+00 1.85E+00 4.14E+00 U WG W-15 283333015 8/2/2011 H-3 1.91E+02 1.62E+02 4.95E+02 U WG W-15 283333015 8/2/2011 1-131 6.63E-01 1.18E+00 3.92E+00 U WG W-15 283333015 8/2/2011 K-40 2.41E+00 1.61E+01 2.16E+01 U WG W-15 283333015 8/2/2011 La- 140 1.94E+00 1.14E+00 3.73E+00 U WG W-15 283333015 8/2/2011 Mn-54 -8.73E-01 6.59E-01 1.96E+00 U WG W-15 283333015 8/2/2011 Nb-95 3.23E-02 6.30E-01 2.09E+00 U WG W-15 283333015 8/2/2011 Ru-103 2.42E-01 7.15E-01 2.32E+00 U WG W-15 283333015 8/2/2011 Ru-I106 -4.17E+00 5.46E+00 1.76E+01 U WG W-15 283333015 8/2/2011 Sb-124 -1.65E+00 1.67E+00 4.95E+00 U WG W-15 283333015 8/2/2011 Sb-125 -1.96E+00 I1.66E+00 5.02E+00 U WG W-15' 283333015 8/2/2011 Se-75 7.63E-01 8.17E-01 2.74E+00 U WG W-15 283333015 8/2/2011 Th-228 -1.17E-01 1.49E+00 4.11E+00 U WG W-15 283333015 8/2/2011 Zn-65 -1.65E+00 1.65E+00 4.39E+00 U WG W-15 283333015 8/2/2011 Zr-95 3.70E-01 1.15E+00 3.83E+00 U WG MW-20 283333016 8/1/2011 Ac-228 -3.03E+00 3.50E+00 6.98E+00 U WG 'MW-20 283333016 8/1/2011 Ag-108m -5.66E-02 5.19E-01 1.67E+00 U WG MW-20 283333016 8/1/2011 Ag-110m 2.82E-01 5.04E-01 1.71E+00 U WG MW-20 283333016 8/1/2011 Ba- 140 -2.60E-01 1.05E+00 3.45E+00 U WG MW-20 283333016 8/1/2011 Be-7 -1.10E+01 5.69E+00 1.52E+01 U WG MW-20 283333016 8/1/2011 Ce-I141 1.22E+00 1.10E+00 3.53E+00 U WG MW-20 283333016 8/1/2011 Ce-I144 2.34E+00 3.77E+00 1.23E+01 U WG MW-20 283333016 8/1/2011 Co-57 -1.47E-02 4.80E-01 1.63E+00 U WG MW-20 283333016 8/1/2011 Co-58 -7.44E-02 5.65E-01 i .86E+00 U WG MW-20 283333016 8/1/2011 Co-60 2.80E-01 8.65E-01 2.18E+00 U WG MW-20 283333016 8/1/2011 Cr-51 2.76E+00 5.69E+00 1.87E+01 U WG MW-20 283333016 8/1/2011 Cs-134 1.27E+00 7.17E-01 2.3 1E+00 U "WG MW-20 283333016 8/1/2011 Cs-137 -3.46E-01 5.71E-01 1.86E+00 U WG MW-20 283333016 8/1/2011 Fe-59 -2.62E-01 1.18E+00 3.81E+00 U WG MW-20 283333016 8/1/2011 H-3 -1.55E+02 1.41E+02 4.94E+02 U WG MW-20 283333016 8/1/2011 1-131 -2.28E+00 1.24E+00 3.44E+00 U WG MW-20 283333016 8/1/2011 K-40 -1.52E-01 9.42E+00 2.53E+01 U WG MW-20 283333016 8/1/2011 La-140 -2.60E-01 1.05E+00 3.45E+00 U WG MW-20 283333016 8/1/2011 Mn-54 -6.78E-01 6.80E-01 1.71E+00 U.

WG MW-20 283333016 8/1/2011 Nb-95 4.84E-03 5.73E-01 1.91E+00 U D-179

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG MW-20 283333016 8/1/2011 Ru-103 -1.44E+00 7.35E-01 1.94E+00 U WG MW-20 283333016 8/1/2011 Ru-106 -4.24E+00 4.97E+00 1.59E+01 U WG MW-20 ,283333016 8/1/2011 Sb-124 -1.47E+00 1.41E+00 4.27E+00 U WG MW-20 283333016 8/1/2011 Sb-125 -3.98E+00 1.81E+00 4.65E+00 U WG MW-20 283333016 8/1/2011 Se-75 -3.33E-01 7.70E-01 2.5 1E+00 U WG MW-20 283333016 8/1/2011 Th-228 -6.52E-01 1.48E+00 4.08E+00 U WG MW-20 283333016 8/1/2011 Zn-65 2.04E+00 1.29E+00 3.76E+00 U WG MW-20 283333016 8/1/2011 Zr-95 5.54E-01 9.93E-01 3.34E+00 U WG MW-21 283333017 8/1/2011 Ac-228 -1.43E+00 4.04E+00 9.37E+00 U WG MW-21 283333017 8/1/2011 Ag-108m 1.07E-01 5.88E-01 1.95E+00 U WG MW-21 283333017 8/1/2011 Ag-1 10m -1.92E-01 6.30E-01 2.02E+00 U WG MW-21 283333017 8/1/2011 Ba- 140 -8.71E-01 1.36E+00 4.23E+00 U WG MW-21 283333017 8/1/2011 Be-7 -7.49E+00 5.96E+00 1.80E+01 U WG MW-21 283333017 8/1/2011 Ce-141 1.85E-01 1.38E+00 4.11E+00 U WG MW-21 283333017 8/1/2011 Ce-144 7.77E+00 5.28E+00 1.52E+01 U WG MW-21 283333017 8/1/2011 Co-57 1.18E-01 5.94E-01 1.93E+00 U WG MW-21 283333017 8/1/2011 Co-58 1.78E+00 7.93E-01 2.45E+00 U WG MW-21 283333017 8/1/2011 Co-60 -1.95E-01 6.86E-01 2.22E+00 U WG MW-21 283333017 8/1/2011 Cr-51 -1.11E+01 7.21E+00 2.17E+01 U WG MW-21 283333017 8/1/2011 Cs-134 -3.83E-01 1.05E+00 2.62E+00 U WG MW-21 283333017 8/1/2011 Cs-137 3.91E-02 7.04E-01 2.29E+00 U WG MW-21 283333017 8/1/2011 Fe-59 -3.52E-01 1.36E+00 4.46E+00 U WG MW-21 283333017 8/1/2011 H-3 -1.05E+02 1.44E+02 4.95E+02 U WG MW-21 283333017 8/1/2011 1-131 2.17E-01 1.37E+00 4.55E+00 U WG MW-21 283333017 8/1/2011 K-40 -7.67E+00 1.26E+01 3.05E+01 U WG MW-21 283333017 8/1/2011 La-140 -8.71E-01 1.36E+00 4.23E+00 U WG MW-21 283333017 8/1/2011 Mn-54 8.41E-01 6.90E-01 2.3 1E+00 U WG MW-21 283333017 8/1/2011 Nb-95 1.06E+00 7.37E-01 2.36E+00 U WG MW-21 283333017 8/1/2011 Ru-103 5.97E-01 7.15E-01 2.35E+00 U WG MW-21 283333017 8/1/2011 Ru-106 8.93E+00 6.34E+00 2.04E+01 U WG MW-21 283333017 8/1/2011 Sb-124 2.02E+00 1.78E+00 5.91E+00 U WG MW-21 283333017 8/1/2011 Sb-125 1.40E+00 1.84E+00 6.08E+00 U WG MW-21 283333017 8/1/2011 Se-75 -9.26E-01 9.45E-01 3.03E+00 U WG MW-21 283333017 8/1/2011 Th-228 6.68E+00 3.53E+00 4.80E+00 UI WG MW-21 283333017 8/1/2011 Zn-65 -1.51E+00 1.53E+00 4.74E+00 U WG MW-21 283333017 8/1/2011 Zr-95 -5.42E-01 1.22E+00 3.86E+00 U WG SG-1 283333018 8/2/2011 Ac-228 -5.63E+00 3.65E+00 8.45E+00 U WG SG-1 283333018 8/2/2011 Ag-108m 1.09E-01 5.46E-01 1.84E+00 U WG SG-1 283333018 8/2/2011 Ag-110m -5.20E-01 6.41E-01 2.03E+00 U.

WG SG-1 283333018 8/2/2011 ALPHA 1.01E+00 1.12E+00 2.79E+00 U WG SG-1 283333018 8/2/2011 Ba- 140 -5.5 1E+00 2.52E+00 3.58E+00 U WG SG-1 283333018 8/2/2011 Be-7 4.89E+00 5.37E+00 1.80E+01 U WG SG-1 283333018 8/2/2011 BETA 4.98E+00 .1.29E+00 3.OOE+00 WG SG-1 283333018 8/2/2011 Ce-141 1.25E+00 1.15E+00 3.62E+00 U WG SG-1 283333018 8/2/2011 Ce- 144 1.62E+00 4.26E+00 1.31E+01 U WG SG-1 283333018 8/2/2011 Co-57 4.76E-01 5.49E-01 1.8]E+00 U WG SG-1 283333018 8/2/2011 Co-58 -1.78E-01 6.77E-01 2.18E+00 U WG SG-1 283333018 8/2/2011 Co-60 4.49E-01 7.19E-01 2.42E+00 U WG SG-1 283333018 8/2/2011 Cr-51 -3.85E+00 6.07E+00 1.90E+01 U WG SG-1 283333018 8/2/2011 Cs-134 6.27E-01 7.24E-01 2.39E+00 U WG SG-I 283333018 8/2/2011 Cs-137 -5.82E-01 6.85E-01 2.16E+00 U D-180

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-I 283333018 8/2/2011 Fe-59 3.90E-02 1.27E+00 4.28E+00 U WG SG-1 283333018 8/2/2011 H-3 1.05E+02 1.59E+02 5.04E+02 U WG SG-1 283333018 8/2/2011 1-131 -2.1 1E+00 1.25E+00 3.50E+00 U WG SG-I 283333018 8/2/2011 K-40 9.74E+00 1.11E+01 1.86E+01 U WG SG-1 283333018 8/2/2011 La-140 -5.5 1E+00 2.51E+00 3.58E+00 U WG SG-I 283333018 8/2/2011 Mn-54 7.88E-03 6.25E-01 2.04E+00 U WG SG-1 283333018 8/2/2011 Nb-95 4.99E-01 6.36E-01 2.10E+00 U WG SG-I 283333018 8/2/2011 Ru- 103 -1.77E+00 7.85E-01 2.05E+00 U WG SG-1 283333018 8/2/2011 Ru-106 8.26E+00 6.07E+00 1.98E+01 U WG SG-1 283333018 8/2/2011 Sb-124 -3.29E+00 1.76E+00 4.58E+00 U WG SG-1 283333018 8/2/2011 Sb-125 5.74E-01 1.63E+00 5.52E+00. U WG SG-I 283333018 8/2/2011 Se-75 3.05E-01 8.32E-01 2.71E+00 U WG SG-1 283333018 8/2/2011 Th-228 6.3 1E+00 3.07E+00 4.1OE+00 UI WG SG-1 283333018 8/2/2011 Zn-65 4.80E-01 1.77E+00 4.55E+00 U WG SG-1 283333018 8/2/2011 Zr-95 1.69E+00 1.19E+00 3.85E+00 U WG SG-2 283333019 8/1/2011 Ac-228 1.12E+01 4.98E+00 9.43E+00 UI WG SG-2 283333019 8/1/2011 Ag-108m 7.06E-01 5.17E-01 1.66E+00 U WG SG-2 283333019 8/1/2011 Ag-110m -9.74E-02 5.84E-01 1.96E+00 U WG SG-2 283333019 8/1/2011 ALPHA 6.06E-01 9.19E-01 2.48E+00 U WG SG-2 283333019 8/1/2011 Ba-I140 1.22E+00 1.11E+00 3.74E+00 U WG SG-2 283333019 8/1/2011 Be-7 1.00E+01 5.48E+00 1.70E+01 U WG SG-2 283333019 8/1/2011 BETA 4.5 1E+00 1.26E+00 2.97E+00 WG SG-2 283333019 8/1/2011 Ce- 141 -2.34E+00 1.25E+00 3.47E+00 U WG SG-2 283333019 8/1/2011 Ce-I144 5.09E+00 4.23E+00 1.32E+01 U WG SG-2 283333019 8/1/2011 Co-57 1.58E-01 5.31E-01 1.71E+00 U WG SG-2 283333019 8/1/2011 Co-58 -7.55E-01 6.05E-01 1.84E+00 U WG SG-2 283333019 8/1/2011 Co-60 -1.82E+00 1.02E+00 2.33E+00 U WG SG-2 283333019 8/1/2011 Cr-51 2.82E+00 5.54E+00 1.84E+01 U WG SG-2 283333019 8/1/2011 Cs-134 1.66E-01 7.04E-01 2.35E+00 U WG SG-2 283333019 8/1/2011 Cs-137 -3.24E-01 7.95E-01 2.23E+00 U WG SG-2 283333019 8/1/2011 Fe-59 1.80E+00 1.27E+00 4.14E+00 U WG SG-2 283333019 8/1/2011 H-3 2.57E+02 1.64E+02 4.89E+02 U WG SG-2 283333019 .8/1/2011 1-131 1.53E-01 1.16E+00 3.83E+00 U WG SG-2 283333019 8/1/2011 K-40 3.45E+01 1.49E+01 1.75E+01 UI WG SG-2 283333019 8/1/2011 La-140 1.22E+00 1.11E+00 3.74E+00 U WG SG-2 283333019 8/1/2011 Mn-54 -3.97E-01 5.58E-01 1.78E+00 U WG SG-2 283333019 8/1/201.1 Nb-95 4.32E-01 6.07E-01 2.04E+00 U WG SG-2 283333019 8/1/2011 Ru-103 2.52E-0I 6.43E-01 2.09E+00 U WG SG-2 283333019 8/1/2011 Ru-106 -2.26E+00 4.86E+00 1.61E+01 U WG SG-2 283333019 8/1/2011 Sb-124 -1.40E+00 1.40E+00 4.23E+00 U WG SG-2 283333019 8/1/2011 Sb-125 -9.58E-01 1.54E+00 4.89E+00 U WG SG-2 283333019 8/1/2011 Se-75 -4.68E-01 7.81E-01 2.56E+00 U WG SG-2 283333019 8/1/2011 Th-228 -1.52E+00 1.67E+00 3.85E+00 U WG SG-2 283333019 8/1/2011 Zn-65 -2.44E+00 1.34E+00 3.61E+00 U WG SG-2 283333019 8/1/2011 Zr-95 -3.73E-02 1.04E+00 3.46E+00 U WG SG-4 283333020 8/2/2011 Ac-228 4.58E-01 6.27E+00 1.07E+01 U WG SG-4 283333020 8/2/2011 Ag-108m -7.31E-01 6.15E-01 1.89E+00 U WG SG-4 283333020 8/2/2011 Ag-110m -9.19E+00 2.32E+00 2.07E+00 U WG SG-4 283333020 8/2/2011 ALPHA 4.17E+00 1.54E+00 1.58E+00 WG SG-4 283333020 8/2/2011 Ba-140 -2.55E-01 1.31E+00 4.21E+00 U WG SG-4 283333020 8/2/2011 Be-7 1.79E+01 7.44E+00 2.16E+01 U D-181

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-4 283333020 8/2/2011 BETA 1.46E+01 2.19E+00 3.49E+00 WG SG-4 283333020 8/2/2011 Ce- 141 -6.22E-01 1.06E+00 3.49E+00 U WG SG-4 283333020 8/2/2011 Ce- 144 3.91E+00 3.90E+00 1.29E+01 U WG SG-4 283333020 8/2/2011 Co-57 -6.36E-01 4.99E-01 1.58E+00 U WG SG-4 283333020 8/2/2011 Co-58 -7.94E-01 8.76E-01 2.15E+00 U 1.59E+00 WG SG-4 283333020 8/2/2011 Co-60 8.74E-01 2.85E+00 U WG SG-4 283333020 8/2/2011 Cr-51 6.94E+00 6.45E+00 2.16E+01 U WG SG-4 283333020 8/2/2011 Cs-134 1.15E+00 9.20E-01 3.05E+00 U WG SG-4 283333020 8/2/2011 Cs-137 -2.59E+00 1.53E+00 3.95E+00 U WG SG-4 283333020 8/2/2011 Fe-59 -2.59E+00 1.65E+00 4.57E+00 U WG SG-4 283333020 8/2/2011 H-3 3.61E+01 1.57E+02 5.08E+02 U WG SG-4 283333020 8/2/2011 1-131 -4.01E-01 1.20E+00 3.99E+00 U WG SG-4 283333020 8/2/2011 K-40 3.OOE+01 1.67E+01 2.29E+01 UI WG SG-4 283333020 8/2/2011 La-140 -2.55E-01 1.31E+00 4.21E+00 U WG SG-4 283333020 8/2/2011 Mn-54 2.24E-01 7.27E-01 2.43E+00 U WG SG-4 283333020 8/2/2011 Nb-95 3.75E-01 7.18E-01 2.42E+00 U WG SG-4 283333020 8/2/2011 Ru-103 -7.60E-02 7.56E-01 2.47E+00 U WG SG-4 283333020 8/2/2011 Ru-106 1.67E+00 6.49E+00 2.10E+01 U WG SG-4 283333020 8/2/2011 Sb-124 -3.15E+00 2.5 1E+00 4.98E+00 U WG SG-4 283333020 8/2/2011 Sb-125 -1. 19E+00 1.78E+00 5.72E+00 U WG SG-4 283333020 8/2/2011 Se-75 4.96E-01 8.65E-01 2.78E+00 U WG SG-4 283333020 8/2/2011 Th-228 1.63E+00 2.22E+00 4.43E+00 U WG SG-4 283333020 8/2/2011 Zn-65 -2.74E-01 1.56E+00 4.99E+00 U WG SG-4 283333020 8/2/2011 Zr-95 3.41E-01 1.25E+00 4.20E+00 U WG SG-5 283333021 8/2/2011 Ac-228 2.43E+00 3.79E+00 1.00E+01 U WG SG-5 283333021 8/2/2011 Ag-108m -2.34E-01 5.59E-01 1.85E+00 U WG SG-5 283333021 8/2/2011 Ag-Il0m -2.66E-01 5.91E-01 1.89E+00 U WG SG-5 283333021 8/2/2011 ALPHA 1.33E+00 1.27E+00 2.75E+00 U WG SG-5 283333021 8/2/2011 Ba- 140 1.74E+00 1.13E+00 3.76E+00 U WG SG-5 283333021 8/2/2011 Be-7 7.23E-01 5.53E+00 1.85E+01 U WG SG-5 283333021 8/2/2011 BETA 2.87E+01 3.17E+00 2.55E+00 WG SG-5 283333021 8/2/2011 Ce- 141 3.26E+00 1.95E+00 3.80E+00 U WG SG-5 283333021 8/2/2011 Ce-144 4.89E+00 4.50E+00 1.47E+01 U WG SG-5 283333021 8/2/2011 Co-57 3.02E-01 5.46E-01 1.83E+00 U WG SG-5 283333021 8/2/2011 Co-58 -1.24E+00 1.18E+00 1.95E+00 U WG SG-5 283333021 8/2/2011 Co-60 7.64E-01 7.22E-01 2.38E+00 U WG SG-5 283333021 8/2/2011 Cr-51 -3.34E+00 6.33E+00 2.OOE+01 U WG SG-5 283333021 8/2/2011 Cs-134 5.26E-01 7.81E-01 2.54E+00 U WG SG-5 283333021 8/2/2011 Cs-137 6.30E-01 6.60E-01 2.16E+00 U WG SG-5 283333021 8/2/2011 Fe-59 3.23E-01 1.23E+00 4.09E+00 U WG SG,-5 283333021 8/2/2011 H-3 1.04E+02 1.58E+02 4.98E+02 U WG SG-5 283333021 8/2/2011 1-131 -1.01E+00 1.18E+00 3.85E+00 U WG SG-5 283333021 8/2/2011 K-40 2.90E+01 1.57E+01 2.19E+01 UI WG SG-5 283333021 8/2/2011 La-140. 1.74E+00 1.13E+00 3.76E+00 U WG SG-5 283333021 8/2/2011 Mn-54 -1.14E+00 6.88E-01 2.02E+00 U WG SG-5 283333021 8/2/2011 Nb-95 1.84E+00 8.26E-01 2.44E+00 U WG SG-5 283333021 8/2/2011 Ru-103 5.07E-01 7.OOE-01 2.33E+00 U WG SG-5 283333021 8/2/2011 Ru-106 2.21E+00 5.88E+00 1.94E+01 U WG SG-5 283333021 8/2/2011 Sb-124 5.23E-01 1.48E+00 4.98E+00 U WG SG-5 283333021 8/2/2011 Sb-125 -2.30E+00 1.77E+00 5.49E+00 U WG SG-5 283333021 8/2/2011 Se-75 -5.69E-01 8.88E-01 2.82E+00 U D-182

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN. DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-5 283333021 8/2/2011 Th-228 -1.05E+00 1.85E+00 4.63E+00 U WG SG-5 283333021 8/2/2011 Zn-65. -4.63E+00 1.81E+00 4.28E+00 U WG SG-5 283333021 8/2/2011 Zr-95 -1.08E+00 1.17E+00 3.59E+00 U WG W-1 289568001 11/1/2011 Ac-228 6.87E+00 5.52E+00 1.40E+01 U WG W-1 289568001 11/1/2011 Ag-108m 1.07E+00 8.15E-01 2.62E+00 U WG W-1 289568001 11/1/2011 Ag-1 10m 8.27E-01 8.35E-01 2.79E+00 U WG W-1 289568001 11/1/2011 Ba- 140 -6.74E-01 1.49E+00 4.80E+00 U WG W-1 289568001 11/1/2011 Be-7 5.42E+00 7.79E+00 2.65E+01 U WG W-1 289568001 11/1/2011 Ce- 141 8.20E-01 2.36E+00 5.36E+00 U WG W-1 289568001 11/1/2011 Ce-I144 7.96E-01 6.35E+00 2.03E+01 U WG W-1 289568001 11/1/2011 Co-57 -3.56E-01 8.62E-01 2.72E+00 U WG W-1 289568001 11/1/2011 Co-58 -1.25E+00 8.73E-01 2.43E+00 U WG W-1 289568001 11/1/2011 Co-60 1.65E-01 9.24E-01 3.04E+00 U WG W-1 289568001 11/1/2011 Cr-51 3.35E-01 8.59E+00 2.81E+01 U WG W-1 289568001 11/1/2011 Cs-134 -8.03E-01 9.69E-01 2.93E+00 U WG W-1 289568001 11/1/2011 Cs-137 7.54E-02 9.09E-01 3.OOE+00 U WG W-1 289568001 11/1/2011 Fe-59 -6.88E-02 1.71E+00 5.65E+00 U WG W-1 289568001 11/1/2011 H-3 3.76E+01 1.77E+02 5.76E+02 U WG W-1 289568001 11/1/2011 1-131 2.72E-01 1.54E+00 5.01E+00 U WG W-1 289568001 11/1/2011 K-40 3.34E+01 1.92E+01 2.75E+01 UI WG W-1 289568001 11/1/2011 La-140 -6.74E-01 1.49E+00 4.80E+00 U WG W-1 289568001 11/1/2011 Mn-54 4.54E-03 8.79E-01 2.84E+00 U WG W-1 289568001 11/1/2011 Nb-95 1.30E+00 9.18E-01 3.01E+00 U WG W-1 289568001 11/1/2011 Ru-103 -2.80E+00 1.14E+00 2.75E+00 U WG W-1 289568001 11/1/2011 Ru-106 6.49E+00 8.26E+00 2.77E+01 U WG W-1 289568001 11/1/2011 Sb-124 -1.40E-01 2.3 1E+00 7.62E+00 U WG W-1 289568001 11/1/2011 Sb-125 3.18E+00 2.61E+00 8.39E+00 U WG W-1 289568001 11/1/2011 Se-75 -1.73E+00 1.26E+00 3.78E+00 U WG W-1 289568001 11/1/2011 Th-228 -6.19E+00 3.30E+00 8.16E+00 U WG W-1 289568001 11/1/2011 Zn-65 -3.80E+00 2.07E+00 5.45E+00 U WG W-1 289568001 11/1/2011 Zr-95 -7.78E-01 1.57E+00 4.94E+00 U WG W-2 289568002 11/2/2011 Ac-228 1.00E+01 4.20E+00 1.28E+01 U WG W-2 289568002 11/2/2011 Ag-108m 3.38E-01 7.38E-01 2.47E+00 U WG W-2 289568002 11/2/2011 Ag-110m -7.72E+00 2.07E+00 2.49E+00 U WG W-2 289568002 11/2/2011 Ba- 140 1.00E+00 1.35E+00 4.57E+00 U WG W-2 289568002 11/2/2011 Be-7 1.66E+00 7.16E+00 2.37E+01 U WG W-2 289568002 11/2/2011 Ce-141 5.17E-01 1.28E+00 4.29E+00 U WG W-2 289568002 11/2/2011 Ce- 144 -4.40E-01 4.76E+00 1.60E+01 U WG W-2 289568002 11/2/2011 Co-57 3.08E-01 5.84E-01 1.98E+00 U WG W-2 289568002 11/2/2011 Co-58 -4.10E-01 8.52E-01 2.75E+00 U WG W-2 289568002 11/2/2011 Co-60 -1.50E+00 1.02E+00 2.87E+00 U WG W-2 289568002 11/2/2011 Cr-51 -5.18E+00 7.27E+00 2.39E+01 U WG W-2 289568002 11/2/2011 Cs-134 7.92E-01 9.87E-01 3.35E+00 U WG W-2 289568002 11/2/2011 Cs-137 -1.87E+00 1.60E+00 4.76E+00 U WG W-2 289568002 11/2/2011 Fe-59 -9.46E-01 1.84E+00 5.73E+00 U WG W-2 289568002 11/2/2011 H-3 -1.47E+02 1.66E+02 5.71E+02 U WG W-2 289568002 11/2/2011 1-131 -2.47E-01 1.38E+00 4.61E+00 U WG W-2 289568002 11/2/2011 K-40 -4.03E+00 1.56E+01 3.69E+01 U WG W-2 289568002 11/2/2011 La-140 1.00E+00 1.35E+00 4.57E+00 U WG W-2 289568002 11/2/2011 Mn-54 -7.67E-02 8.07E-01 2.66E+00 U WG W-2 289568002 11/2/2011 Nb-95 -1.24E-01 8.31E-01 2.75E+00 U D-183

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-2 289568002 11/2/2011 Ru-103 -1. 17E+00 9.91E-01 2.98E+00 WG W-2 289568002 11/2/2011 Ru-106 -6.64E-01 7.58E+00 2.43E+01 WG W-2 289568002 11/2/2011 Sb-124 -7.74E-01 2.33E+00 7.34E+00 WG W-2 289568002 11/2/2011 Sb-125 -8.56E-01 2.26E+00 7.37E+00 WG W-2 289568002 11/2/2011 Se-75 -1.03E-02 1.1 IE+00 3.55E+00 WG W-2 289568002 11/2/2011 Th-228 3.77E-01 2.42E+00 5.60E+00 WG W-2 289568002 11/2/2011 Zn-65 -6.92E+00 2.67E+00 5.54E+00 WG W-2 289568002 11/2/2011 Zr-95 -5.96E-01 1.53E+00 5.OOE+00 WG W-3 289568003 11/1/2011 Ac-228 1.36E+00 3.59E+00 1.13E+01 WG W-3 289568003 11/1/2011 Ag-108m -1.35E+00 7.64E-01 2.21E+00 WG W-3 289568003 11/1/2011 Ag-110m 1.37E+00 8.61E-01 2.76E+00 WG W-3 289568003 11/1/2011 Ba-140 1.07E+00 1.30E+00 4.46E+00 WG W-3 289568003 11/1/2011 Be-7 5.95E+00 6.78E+00 2.27E+01 WG W-3 289568003 11/1/2011 Ce- 141 1.56E+00 1.48E+00 4.74E+00 WG W-3 289568003 11/1/2011 Ce- 144 -1.26E+00 5.11E+00 1.70E+01 WG W-3 289568003 11/1/2011 Co-57 -3.34E-01 6.72E-01 2.22E+00 WG W-3 289568003 11/1/2011 Co-58 2.33E-01 7.61E-01 2.48E+00 WG W-3 289568003 11/1/2011 Co-60 2.01E+00 9.11E-01 2.88E+00 WG W-3 289568003 11/1/2011 Cr-51 3.48E+00 8.29E+00 2.35E+01 WG W-3 289568003 11/1/2011 Cs-134 -1.67E+00 1.23E+00 2.87E+00 WG W-3 289568003 11/1/2011 Cs-137 -2'. 12E-01 8.33E-01 2.69E+00 WG W-3 289568003 11/1/2011 Fe-59 1.66E-01 1.43E+00 4.74E+00 WG W-3 289568003 11/1/2011 H-3 3.30E+02 1.91E+02 5.65E+02 WG W-3 289568003 11/1/2011 1-131 -1.70E+00 1.42E+00 4.46E+00 WG W-3 289568003 11/1/2011 K-40 -2.25E+01 1.28E+01 3.44E+01 WG W-3 289568003 11/1/2011 La-140 1.07E+00 1.30E+00 4.46E+00 WG W-3 289568003 11/1/2011 Mn-54 1.08E-01 9.19E-01 2.5 1E+00 WG W-3 289568003 11/1/2011 Nb-95 -2.46E-01 8.03E-01 2.56E+00 WG W-3 289568003 11/1/2011 Ru-103 -6.20E-01 8.OOE-01 2.55E+00 WG W-3 289568003 11/1/2011 Ru-I106 7.46E+00 7.05E+00 2.33E+01 WG W-3 289568003 11/1/2011 Sb-124 1.14E+00 1.82E+00 6.22E+00 WG W-3 289568003 11/1/2011 Sb-125 -7.38E-01 2.11E+00 6.97E+00 WG W-3 289568003 11/1/2011 Se-75 -2.08E-01 1.08E+00 3.48E+00 WG W-3 289568003 11/1/2011 Th-228 1.32E+00 2.41E+00 5.61E+00 WG W-3 289568003 11/1/2011 Zn-65 -2.63E+00 1.71E+00 4.85E+00 WG W-3 289568003 11/1/2011 Zr-95 -2.99E+00 1.59E+00 4.22E+00 WG W-4 289568004 11/3/2011 Ac-228 -1.10E+01 5.04E+00 1.20E+01 WG W-4 289568004 11/3/2011 Ag-108m *6.69E-01 8.18E-01 2.48E+00 WG W-4 289568004 11/3/2011 Ag-110m 1.73E-01 7.79E-01 2.59E+00 WG W-4 289568004 11/3/2011 Ba- 140 -6.82E-02 1.57E+00 5.2 1E+00 WG W-4 289568004 11/3/2011 Be-7 1.37E+01 8.07E+00 2.65E+01 WG W-4 289568004 11/3/2011 Ce-I141 1.55E+00 2.62E+00 5.49E+00 WG W-4 289568004 11/3/2011 Ce-144 6.43E+00 6.77E+00 2.15E+01 WG W-4 289568004 11/3/2011 Co-57 3.72E-01 8.26E-01 2.66E+00 WG W-4 289568004 11/3/2011 Co-58 4.29E-01 8.46E-01 2.80E+00 WG W-4 289568004 11/3/2011 Co-60 5.99E-02 1.01E+00 3.30E+00 WG W-4 289568004 11/3/2011 Cr-51 4.06E+00 9.05E+00 2.98E+01 WG W-4 289568004 11/3/2011 Cs-134 -8.20E-01 1.10E+00 3.38E+00 WG W-4 289568004 11/3/2011 Cs-137 -2.38E+00 1.04E+00 2.50E+00 WG W-4 289568004 11/3/2011 Fe-59 3.3 1E+00 1.98E+00 6.59E+00 WG W-4. 289568004 11/3/2011 H-3 9.75E+02 2.41E+02 5.80E+02 D-184

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-4 289568004 11/3/2011 1-131 -8.16E-01 1.71E+00 5.41E+00 WG W-4 289568004 11/3/201 f K-40 2.21E+01 1.43E+01 4.49E+01 WG W-4 289568004 11/3/2011 La-140 -6.82E-02 1.57E+00 5.21E+00 WG W-4 289568004 11/3/2011 Mn-54 6.63E-01 9.40E-01 3.09E+00 WG W-4 289568004 11/3/2011 Nb-95 -1.24E+00 9.19E-01 2.63E+00 WG W-4 289568004 11/3/2011 Ru-103 2.59E-01 9.37E-01 3.17E+00 WG W-4 289568004 11/3/2011 Ru- 106 1.94E+00 8.07E+00 2.69E+01 WG W-4 289568004 11/3/2011 Sb-124 7.05E-01 1.73E+00 5.93E+00 WG W-4 289568004 11/3/2011 Sb-125 4.39E-01 2.43E+00 7.82E+00 WG W-4 289568004 11/3/2011 Se-75 6.71E-02 1.22E+00 4.05E+00 WG W-4 289568004 11/3/2011 Th-228 2.36E+00 2.99E+00 5.52E+00 WG W-4 289568004 11/3/2011 Zn-65 6.76E-01 2.14E+00 6.21E+00 WG W-4 289568004 11/3/2011 Zr-95 -7.17E-01 1.60E+00 5.07E+00 WG W-5 289568005 11/3/2011 Ac-228 -2.28E+00 3.68E+00 1.07E+01 WG W-5 289568005 11/3/2011 Ag-108m 5.68E-01 6.40E-01 2.15E+00 WG W-5 289568005 11/3/2011 Ag-110m -1.79E+00 8.19E-01 1.99E+00 WG W-5 289568005 11/3/2011 Ba- 140 -8.14E-01 1.20E+00 3.71E+00 WG W-5 289568005 11/3/2011 Be-7 -9.33E+00 6.44E+00 1.88E+01 WG W-5 289568005 11/3/2011 Ce- 141 -1.54E+00 1.62E+00 4.15E+00 WG W-5 289568005 11/3/2011 Ce-144 -5.98E+00 5.09E+00 1.59E+01 WG W-5 289568005 11/3/2011 Co-57 3.3 1E-02 6.30E-01 2.12E+00 WG W-5 289568005 11/3/2011 Co-58 -4.46E-01 7.48E-01 2.42E+00 WG W-5 289568005 11/3/2011 Co-60 1.48E-02 7.40E-01 2.39E+00 WG W-5 289568005 11/3/2011 Cr-51 1.33E+00 6.44E+00 2.20E+01 WG W-5 289568005 11/3/2011 Cs-134 -1.19E-01 8.40E-01 2.80E+00 WG W-5 289568005 11/3/2011 Cs-137 9.39E-01 8.50E-01 2.78E+00 WG W-5 289568005 11/3/2011 Fe-59 6.98E-01 1.56E+00 5.22E+00 wG W-5 289568005 11/3/2011 H-3 5.22E+02 2.07E+02 5.77E+02 WG W-5 289568005 11/3/2011 1-131 7.35E-01 1.28E+00 4.37E+00 WG W-5 289568005 11/3/2011 K-40 3.67E+01 1.58E+01 2.42E+01 WG W-5 289568005 11/3/2011 La- 140 -8.14E-01 1.20E+00 3.71E+00 WG W-5 289568005 11/3/2011 Mn-54 -1.73E-01 7.01E-01 2.32E+00 WG W-5 289568005 11/3/2011 Nb-95. 3.13E-02 9.50E-01 2.56E+00 WG W-5 289568005 1-1/3/2011 Ru-103 6.57E-01 7.67E-01 2.56E+00 WG W-5 289568005 11/3/2011 Ru-106 3.85E-01 6.11E+00 1.99E+01 WG W-5 289568005 11/3/2011 Sb-124 -2.22E-01 1.94E+00 6.34E+00 WG W-5 289568005 11/3/2011 Sb-125 1.84E+00 1.92E+00 6.47E+00 WG W-5 289568005 11/3/2011 Se-75 -6.88E-01 9.94E-01 3.08E+00 WG W-5 289568005 11/3/2011 Th-228 2.3 1E-0I 2.13E+00 5.23E+00 WG W-5 289568005 11/3/2011 Zn-65 -4.51E+00 2.09E+00 5.13E+00 WG W-5 289568005 11/3/2011 Zr-95 -2.48E-01 1.26E+00 4.20E+00 WG W-6 289568006 11/3/2011 Ac-228 2.56E+00 3.79E+00 1.09E+01 WG W-6 289568006 11/3/2011 Ag-108m -7.15E-02 6.36E-01 2.05E+00 WG W-6 289568006 11/3/2011 Ag-110m 8.05E-01 6.41E-01 2.17E+00 WG W-6 289568006 11/3/2011 Ba-140 1.40E+00 1.13E+00 3.91E+00 WG W-6 289568006 11/3/2011 Be-7 3.85E+00 6.49E+00 2.12E+61 WG W-6 289568006 11/3/2011 Ce-I141 2.60E+00 1.45E+00 4.47E+00 WG W-6 289568006 11/3/2011 Ce- 144 5.27E+00 5.22E+00 1.63E+01 WG W-6 289568006 11/3/2011 Co-57 1.33E+00 6.94E-01 2.18E+00 WG W-6 289568006 11/3/2011 Co-58 4.63E-01 7.11E-01 2.40E+00 WG W-6 289568006 11/3/2011 Co-60 -7.93E-01 7.41E-01 2.13E+00 D-185

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-6 289568006 11/3/2011 Cr-5I -1.14E+01 7.16E+00 2.06E+01 U WG W-6 289568006 11/3/2011 Cs-134 5.20E-01 8.21E-01 2.78E+00 U WG W-6 289568006 11/3/2011 Cs-137 -1.19E+00 7.26E-01 2.07E+00 U WG W-6 289568006 11/3/2011 Fe-59 3.22E-01 1.45E+00 4.77E+00 U WG W-6 289568006 11/3/2011 H-3 4.85E+02 2.04E+02 5.77E+02 U WG W-6 289568006 11/3/2011 1-131 5.84E-01 1.36E+00 4.46E+00 U WG W-6 289568006 11/3/2011 K-40 2.50E+01 1.16E+01 2.18E+01 WG W-6 289568006 11/3/2011 La-140 1.40E+00 1.13E+00 3.91E+00 U WG W-6 289568006 11/3/2011 Mn-54 -7.64E-01 6.85E-01 2.07E+00 U WG W-6 289568006 11/3/2011 Nb-95 6.84E-01 7.16E-01 2.42E+00 U WG W-6 289568006 11/3/2011 Ru-103 1.34E-01 8.12E-01 2.62E+00 U WG W-6 289568006 11/3/2011 Ru-106 -1.80E+00 5.97E+00 1.98E+01 U WG W-6 289568006 11/3/2011 Sb-124 -2.81E+00 1.78E+00 4.78E+00 U WG W-6 289568006 11/3/2011 Sb-125 -4.98E-01 1.97E+00 6.31E+00 U WG W-6 289568006 11/3/2011 Se-75 -1.89E+00 1.08E+00 3.07E+00 U WG W-6 289568006 11/3/2011 Th-228 3.94E+00 1.97E+00 4.29E+00 U WG W-6 289568006 11/3/2011 Zn-65 -1.14E+00 1.50E+00 3.83E+00 U WG W-6 289568006 11/3/2011 Zr-95 -1.66E-01 1.17E+00 3.87E+00 U WG W-7 289568007 11/1/2011 Ac-228 -4.71E+00 3.56E+00 8.84E+00 U WG W-7 289568007 11/1/2011 Ag-108m 1.47E-01 6.07E-01 2.OOE+00 U WG W-7 289568007 11/1/2011 Ag-Ib0m -6.51E-01 6.66E-01 2.1OE+00 U WG W-7 289568007 11/1/2011 Ba-140 1.37E+00 1.37E+00 4.67E+00 U WG W-7 289568007 11/1/2011 Be-7 1.14E+00 6.1OE+00 2.OOE+01 U WG W-7 289568007 11/1/2011 Ce-141 1.75E+00 1.58E+00 4.49E+00 U WG W-7 289568007 11/1/2011 Ce-144 -4.16E+00 4.92E+00 1.52E+01 U WG W-7 289568007 11/1/2011 Co-57 4.14E-01 6.47E-01 2.1OE+00 U WG W-7 289568007 11/1/2011 Co-58 -4.45E-01 7.12E-01 2.28E+00 'U WG W-7 289568007 11/1/2011 Co-60 8.63E-01 9.95E-01 3.06E+00 U WG W-7 289568007 11/1/2011 Cr-51 1.65E+00 7.27E+00 2.43E+01 U WG W-7 289568007 11/1/2011 Cs-134 4.23E-01 8.15E-01 2.75E+00 U WG W-7 289568007 11/1/2011 Cs-137 -1.60E+00 9.69E-01 2.29E+00 U WG W-7 289568007 11/1/2011 Fe-59 -2.55E+00 1.63E+00 4.46E+00 U WG W-7 289568007 11/1/2011 H-3 1.12E+02 1.80E+02 5.73E+02 U WG W-7 289568007 11/1/2011 1-131 -2.01E+00 1.65E+00 5.03E+00 U WG W-7 289568007 11/1/2011 K-40 -8.59E+00 1.15E+01 3.32E+01 U WG W-7 289568007 11/1/2011 La-140 1.37E+00 1.36E+00 4.67E+00 U WG W-7 289568007 11/1/2011 Mn-54 -3.28E-01 7.51E-01 2.44E+00 U WG W-7 289568007 11/1/2011 Nb-95 -6.46E-01 7.90E-01 2.51E+00 U WG W-7 289568007 11/1/2011 Ru-103 -1.IOE+00 8.90E-01 2.64E+00 U WG W-7 289568007 11/1/2011 Ru-106 -8.20E+00 6.76E+00 1.96E+01 U WG W-7 289568007 11/1/2011 Sb-124 -1.17E+00 1.89E+00 5.93E+00 U WG W-7 289568007 11/1/2011 Sb-125 4.89E+00 2.28E+00 6.94E+00 U WG W-7 289568007 11/1/2011 Se-75 -1.17E+00 9.96E-01 3.12E+00 U WG W-7 289568007 11/1/2011 Th-228 4.15E-01 2.50E+00 4.93E+00 U WG W-7 289568007 11/1/2011 Zn-65 1.70E+00 1.60E+00 4.73E+00 U WG W-7 289568007 11/1/2011 Zr-95 7.74E-01 1.35E+00 4.57E+00 U WG W-8 289568008 11/2/2011 Ac-228 -2.89E+00 4.07E+00 1.03E+01 U WG W-8 289568008 11/2/2011 Ag-108m -3.05E-01 8.52E-01 2.43E+00 U WG W-8 289568008 11/2/2011 Ag-ll0m -4.52E-01 8.16E-01 2.65E+00 U WG W-8 289568008 11/2/2011 Ba-140 4.34E-01 1.37E+00 4.59E+00 U WG W-8 289568008 11/2/2011 Be-7 -6.27E+00 6.71E+00 2.04E+01 U D-186

Donald C. Cook Nuclear Plant D Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-8 289568008 11/2/2011 Ce-141 1.20E+00 2.02E+00 5.42E+00 U WG W-8 289568008 11/2/2011 Ce-144 5.53E-01 5.93E+00 1.89E+01 U WG W-8 289568008 11/2/2011 Co-57 -9.28E-01 7.59E-01 2.40E+00 U WG W-8 289568008 11/2/2011 Co-58 -1.09E+00 1.20E+00 2.53E+00 U WG W-8 289568008 11/2/2011 Co-60 -7.25E-01 7.67E-01 2.36E+00 U WG W-8 289568008 11/2/2011 Cr-51 5.09E+00 8.48E+00 2.79E+01 U WG W-8 289568008 11/2/2011 Cs-134 1.38E+00 1.04E+00 3.43E+00 U WG W-8 289568008 11/2/2011 Cs-137 -4.80E-01 9.65E-01 2.87E+00 U WG W-8 289568008 11/2/2011 Fe-59 5.06E+00 1.98E+00 5.90E+00 U WG W-8 289568008 11/2/2011 H-3 0.OOE+00 1.73E+02 5.69E+02 U WG W-8 289568008 11/2/2011 1-131 -1.85E+00 1.74E+00 5.33E+00 U WG W-8 289568008 11/2/2011 K-40 4.22E+01 1.59E+01 4.30E+01 U WG W-8 289568008 11/2/2011 La-140 4.34E-01 1.37E+00 4.59E+00 U WG W-8 289568008 11/2/2011 Mn-54 -9.33E-01 7.61E-01 2.27E+00 U WG W-8 289568008 11/2/2011 Nb-95 8.26E-01 7.99E-01 2.67E+00 U WG W-8 289568008 11/2/2011 Ru-103 -7.15E-01 9.94E-01 3.08E+00 U WG W-8 289568008 11/2/2011 Ru-106 1.44E+00 6.79E+00 2.28E+01 U WG W-8 289568008 11/2/2011 Sb-124 -4.16E+00 2.42E+00 5.78E+00 U WG W-8 289568008 11/2/2011 Sb-125 4374E-01 2.28E+00 7.43E+00 U WG W-8 289568008 11/2/2011 Se-75 4.68E-01 1.21E+00 4.OOE+00 U WG W-8 289568008 11/2/2011 Th-228 6.31E+00 3.30E+00 6.53E+00 U WG W-8 289568008 11/2/2011 Zn-65 2.69E+00 1.85E+00 5.40E+00 U WG W-8 289568008 11/2/2011 Zr-95 1.20E+00 1.37E+00 4.60E+00 U WG W-9 289568009 11/2/2011 Ac-228 -3.69E+00 4.44E+00 1'.13E+01 U WG W-9 289568009 11/2/2011 Ag-108m 1.1OE+00 8.16E-01 2.68E+00 U WG W-9 289568009 11/2/2011 Ag-Il0m 4.04E-01 7.85E-01 2.59E+00 U WG W-9 289568009 11/2/2011 Ba-140 1.56E+00 1.62E+00 5.38E+00 U WG W-9 289568009 11/2/2011 Be-7 -2.29E+00 7.74E+00 2.54E+01 U WG W-9 289568009 11/2/2011 Ce-141 *-2.11E+00 2.11E+00 5.77E+00 U WG W-9 289568009 11/2/2011 Ce-144 2.23E-01 6.23E+00 2.05E+01 U WG W-9 289568009 11/2/2011 Co-57 1.41E+00 8.95E-01 2.82E+00 U WG W-9 289568009 11/2/2011 Co-58 1.73E+00 9.26E-01 2.91E+00 U WG W-9 289568009 11/2/2011 Co-60 1.18E+00 9.24E-01 2.91E+00 U WG W-9 289568009 11/2/2011 Cr-51 -1.95E+01 9.66E+00 2.72E+01 U WG W-9 289568009 11/2/2011 Cs-134 -3.17E-01 1.04E+00 3.32E+00 U WG W-9 289568009 11/2/2011 Cs-137 -5.19E-01 1.06E+00 2.77E+00 U WG W-9 289568009 11/2/2011 Fe-59 4.1OE-01 2.11E+00 5.74E+00 U WG W-9 289568009 11/2/2011 H-3 1.99E+02 1.82E+02 5.62E+02 U WG W-9 289568009 11/2/2011 1-131 -1.08E+00 2.02E+00 5.88E+00 U WG W-9 289568009 11/2/2011 K-40 6.21E+01 1.96E+01 2.37E+01 WG W-9 289568009 11/2/2011 La-140 1.56E+00 1.62E+00 5.38E+00 U WG W-9 289568009 11/2/2011 Mn-54 1.13E+00 8.66E-01 2.80E+00 U WG W-9 289568009 11/2/2011 Nb-95 2.04E+00 9.49E-01 2.91E+00 U WG W-9 289568009 11/2/2011 Ru-103 -9.93E-02 9.52E-01 3.14E+00 U WG W-9 289568009 11/2/2011 Ru-106 -3.95E+00 7.12E+00 2.26E+01 U WG W-9 289568009 11/2/2011 Sb-124 -3.33E-01 1.91E+00 6.10E+00 U WG W-9 289568009 11/2/2011 Sb-125 -2.26E+00 2.28E+00 7.18E+00 'U WG W-9 289568009 11/2/2011 Se-75 1.62E-02 1.28E+00 4.11E+00 U WG W-9 289568009 11/2/2011 Th-228 -2.26E+00 2.37E+00 6.52E+00 U WG W-9 289568009 11/2/2011 Zn-65 -1.54E+00 1.86E+00 4.87E+00 U WG W-9 289568009, 11/2/2011 Zr-95 8.66E-01 1.53E+00 5.02E+00 U D-187

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-10 289568010 11/2/2011 Ac-228 -5.98E+00 5.90E+00 1.69E+01 WG W-10 289568010 11/2/2011 Ag-108m 8.26E-01 9.63E-01 3.17E+00 WG W-10 289568010 11/2/2011 Ag-1 10m 6.5 1E-02 9.59E-01 3.20E+00 WG W-10 289568010 11/2/2011 Ba-140 -2.64E+00 2.07E+00 5.53E+00 WG W-10 289568010 11/2/2011 Be-7 7.50E+00 9.29E+00 3.05E+01 WG W-10 289568010 11/2/2011 Ce-141 5.60E-01 2.13E+00 5.96E+00 WG W-10 289568010 11/2/2011 Ce- 144 1.61E+00 6.50E+00 2.09E+01 WG W-10 289568010 11/2/2011 Co-57 -3.50E-01 8.71E-01 2.77E+00 WG W-10 289568010 11/2/2011 Co-58 -5.44E-01 9.78E-01 3.05E+00 WG W-10 289568010 11/2/2011 Co-60 -4.51E-01 1.11E+00 3.52E+00 WG W-10 289568010 11/2/2011 Cr-51 -2.89E+00 1.02E+01 3.32E+01 WG W-10 289568010 11/2/2011 Cs-134 -4.43E-01 1.22E+00 3.89E+00 WG W-10 289568010 11/2/2011 Cs-137 -1.24E+00 1.16E+00 3.51 E+00 WG W-10 289568010 11/2/2011 Fe-59 1.92E+00 2.48E+00 8.54E+00 WG W-10 289568010 11/2/2011 H-3 -2.08E+02 1.67E+02 5.86E+02 WG W-10 289568010 11/2/2011 1-131 -1.93E+00 2.11 E+00 6.47E+00 WG W-10 289568010 11/2/2011 K-40 -3.08E+01 2.OOE+01 5.15E+01 WG W-10 289568010 11/2/2011 La-140 -2.64E+00 2.07E+00 5.53E+00 WG W-10 289568010 11/2/2011 Mn-54 2.43E+00 1.15E+00 3.76E+00 WG W-10 289568010 11/2/2011 Nb-95 3.87E-01 1.08E+00 3.60E+00 WG W-10 289568010 11/2/2011 Ru-103 - 1.16E+00 1.35E+00 4.06E+00 WG W-10 289568010 11/2/2011 Ru-I106 -5.12E+00 8.90E+00 2.85E+01 WG W-10 289568010 11/2/2011 Sb-124 8.90E-01 3.22E+00 1.06E+01 WG W-10 289568010 11/2/2011 Sb-125 5.39E+00 2.99E+00 9.57E+00 WG W-10 289568010 11/2/2011 Se-75 5.27E-02 1.34E+00 4.46E+00 WG W-10 289568010 11/2/2011 Th-228 1.44E+00 2.75E+00 7.56E+00 WG W-10 289568010 11/2/2011 Zn-65 -5.25E+00 2.95E+00 7.92E+00 WG W-10 289568010 11/2/2011 Zr-95 2.29E+00 2.3 1E+00 6.99E+00 WG W-1I 289568011 11/2/2011 Ac-228 6.06E+00 3.92E+00 1.28E+01 WG W-11 289568011 11/2/2011 Ag-108m -5.06E-01 7.66E-01 2.45E+00 WG W-1I 289568011 11/2/2011 Ag-I 10m -7.56E+00 2.08E+00 2.90E+00 WG W-1I 289568011 11/2/2011 Ba-140 8.77E-02 1.69E+00 5.52E+00 WG W-11 289568011 11/2/2011 Be-7 -4.65E+00 7.77E+00 2.48E+01 WG W-1I 289568011 11/2/2011 Ce-141 2.08E+00 1.45E+00 4.70E+00 WG W-1I 289568011 11/2/2011 Ce-144 2.86E+00 4.95E+00 1.66E+01 WG W-1I 289568011 11/2/2011 Co-57 8.10E-01 6.34E-01 2.09E+00 WG W-1I 289568011 11/2/2011 Co-58 -2.09E+00 9.94E-01 2.54E+00 WG W-1I 289568011 11/2/2011 Co-60 -3.89E-01 8.87E-01 2.85E+00 WG W-lI 289568011 11/2/2011 Cr-51 7.08E+00 7.71E+00 2.62E+01 WG W-I1 289568011 11/2/2011 Cs-134 1.84E+00 1.19E+00 3.93E+00 WG W-11 289568011 11/2/2011 Cs-137 -1.73E+00 1.66E+00 5.05E+00 WG W-11 289568011 11/2/2011 Fe-59 -1.88E-01 1.95E+00 6.25E+00 WG W-1l 289568011 11/2/2011 H-3 9.11E+01 1.68E+02 5.36E+02 WG W-1II 289568011 11/2/2011 1-131 2.76E+00 1.78E+00 5.83E+00 WG W-11 289568011 11/2/2011 K-40 1.22E+01 2.17E+01 2.92E+01 WG W-1 1 289568011 11/2/2011 La- 140 8.77E-02 1.69E+00 5.52E+00 WG W-1II 289568011 11/2/2011 Mn-54 -5.17E-02 8.72E-01 2.88E+00 W-ll WG W-1I 289568011 11/2/2011 Nb-95 -1.61E-01 9.23E-01 3.06E+00 WG 289568011 11/2/2011 Ru-103 -7.95E-01 9.62E-01 3.OOE+00 WG W-11 289568011 11/2/2011 Ru-106 3.56E+00 8.15E+00 2.65E+01 WG W-1I 289568011 11/2/2011 Sb-124 -1.80E+00 2.17E+00 6.43E+00 D-188

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-1 1 289568011 11/2/2011 Sb-125 -1.50E+00 2.35E+00 7.56E+00 U WG W-1l 289568011 11/2/2011 Se-75 -1.48E-01 1.1OE+00 3.50E+00 U WG W-1l 289568011 11/2/2011 Th-228 4.48E+00 2.58E+00 4.80E+00 U WG W-1l 289568011 11/2/2011 Zn-65 -1.26E+00 2.3 1E+00 6.07E+00 U WG W-1 I 289568011 11/2/2011 Zr-95 9.81E-02 1.60E+00 5.36E+00 U WG W-12 289568012 11/2/2011 Ac-228 1.29E+00 5.72E+00 1.44E+01 U WG W-12 289568012 11/2/2011 Ag-108m -1.40E+00 9.24E-01 2.62E+00 U WG W-12 289568012 11/2/2011 Ag-110m -2.3 1E+00 1.01E+00 2.50E+00 U WG W-12 289568012 11/2/2011 Ba- 140 -5.03E-01 1.36E+00 4.43E+00 U WG W-12 289568012 11/2/2011 Be-7 -7.71E+00 8.68E+00 2.63E+01 U WG W-12 289568012 11/2/2011 Ce- 141 -3.61E+00 2.17E+00 5.41E+00 U WG W-12 289568012 11/2/2011 Ce-144 1.10E+00 6.53E+00 2.111E+01 U WG W-12 289568012 11/2/2011 Co-57 -1.14E+00 8.8 1E-01 2.64E+00 U WG W-12 289568012 11/2/2011 Co-58 -7.07E-01 8.98E-01 2.75E+00 U WG W-12 289568012 11/2/2011 Co-60 9.19E-02 1.06E+00 3.50E+00 U WG W-12 289568012 11/2/2011 Cr-51 1.35E+01 8.99E+00 2.89E+01 U WG W-12 289568012 11/2/2011 Cs-134 -1.43E+00 1.16E+00 3.38E+00 U WG W-12 289568012 11/2/2011 Cs-137 7.36E-01 9.75E-01 3.27E+00 U WG W-12 289568012 11/2/2011 Fe-59 -1.3]E+00 1.85E+00 5.82E+00 U WG W-12 289568012 11/2/2011 H-3 -1.89E+02 1.53E+02 5.39E+02 U WG W-12 289568012 11/2/2011 1-131 1.45E+00 1.63E+00 5.33E+00 U WG W-12 289568012 11/2/2011 K-40 4.12E+00 1.51E+01 4.39E+01 U WG W-12 289568012 11/2/2011 La- 140 -5.03E-01 1.36E+00 4.43E+00 U WG W-12 289568012 11/2/2011 Mn-54 -1.41E-01 8.78E-01 2.83E+00 U WG W-12 289568012 11/2/2011 Nb-95 -5.04E-01 9.12E-01 2.88E+00 U WG W-12 289568012 11/2/2011 Ru-103 -9.41E-01 9.87E-01 3.14E+00 U WG W-12 289568012 11/2/2011 Ru-106 2.43E+00 7.85E+00 2.64E+01 U WG W-12 289568012 11/2/2011 Sb-124 -1.89E+00 2.22E+00 6.77E+00 U WG W-12 289568012 11/2/2011 Sb-125 2.66E-01 2.63E+00 8.53E+00 U WG W-12 289568012 11/2/2011 Se-75 1.11E+00 1.32E+00 4.38E+00 U WG W-12 289568012 11/2/2011 Th-228 2.96E+00 2.70E+00 6.93E+00 U WG W-12 289568012 11/2/2011 Zn-65 -2.25E+00 2.22E+00 5.60E+00 U WG W-12 289568012 11/2/2011 Zr-95 -1.28E+00 1.73E+00 5.39E+00 U WG W-13 289568013 11/1/2011 Ac-228 -2.79E+00 4.55E+00 1.17E+01 U WG W-13 289568013 11/1/2011 Ag-108m -2.75E-01 7.44E-01 2.47E+00 U WG W-13 289568013 11/1/2011 Ag-1 10m -1.13E+00 7.45E-01 2.101E+00 U WG W-13 289568013 11/1/2011 Ba- 140 -2.71E-01 1.43E+00 4.66E+00 U WG W-13 289568013 11/1/2011 Be-7 -4;07E+00 6.95E+00 2.26E+01 U WG W-13 289568013 11/1/2011 Ce- 141 -1.52E-01 1.89E+00 5.43E+00 U WG W-13 289568013 11/1/2011 Ce- 144 6.70E-01 6.06E+00 1.94E+01 U WG W-13 289568013 11/1/2011 Co-57 -1.7]E+00 1.03E+00 2.50E+00 U WG W-13 289568013 11/1/2011 Co-58 -7.78E-01 8.09E-01 2.54E+00 U WG W-13 289568013 11/1/2011 Co-60 8.04E-01 8.79E-01 3.03E+00 U WG W-13 289568013 11/1/2011 Cr-51 I.IIE+01 8.56E+00 2.76E+01 U WG W-13 289568013 11/1/2011 Cs-134 1.23E+00 1.06E+00 3.48E+00 U WG W-13 289568013 11/1/2011 Cs-137 -I.08E+00 1.19E+00 2.65E+00 U WG W-13 289568013 11/1/2011 Fe-59 2.20E+00 1.83E+00 6.101E+00 U WG W-13 289568013 11/1/2011 H-3 2.81E+02 1.83E+02 5.45E+02 U WG W-13 289568013 11/1/2011 1-131 -2.03E+00 1.48E+00 4.3 11E+00 U WG W-13 289568013 11/1/2011 K-40 9.20E-01 1.39E+01 3.95E+01 U WG W-13 289568013 11/1/2011 La-140 -2.7 1E-01 1.43E+00 4.66E+00 U D-189

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-13 289568013 11/1/2011 Mn-54 -6.53E-01 8.12E-01 2.59E+00 U WG W-13 289568013 11/1/2011 Nb-95 7.09E-01 9.10E-01 2.99E+00 U WG W-13 289568013 11/1/2011 Ru-103 '1.05E+00 9.OOE-01 2.78E+00 U WG W-13 289568013 11/1/2011. Ru-106 -1 .00E+00 7.33E+00 2.39E+01 U WG W-13 289568013 11/1/2011 Sb-124 -2.63E+00 2.01E+00 5.62E+00 U WG W-13 289568013 11/1/2011 Sb-125 -1.44E+00 2.33E+00 7.64E+00 U WG W-13 289568013 11/1/2011 Se-75 -4.41E-'01 1.17E+00 3.81 E+00 U WG W-13 289568013 11/1/2011 Th-228 1.21E+00 1.92E+00 5.73E+00 U WG W-13 289568013 11/1/2011 Zn-65 -2.41E+00 2.18E+00 6.56E+00 U WG W-13 289568013 11/1/2011 Zr-95 -1.97E+00 1.50E+00 4.30E+00 U WG W-14 289568014 11/1/2011 Ac-228 -6.45E+00 6.39E+00 1.54E+01 U WG W-14 289568014 11/1/2011 Ag-108m 1.91E-01 7.92E-01 2.64E+00 U WG W-14 289568014 11/1/2011 Ag-il0m 6.67E-02 1.00E+00 3.23E+00 U WG W-14 289568014 11/1/2011 Ba- 140 -8.52E-01 1.75E+00 5.52E+00 U WG W-14 289568014 11/12011 Be-7 4.79E+00 7.84E+00 2.61E+01 U WG W-14 289568014 11/1/2011 Ce- 141 -2.08E+00 1.80E+00 4.22E+00 U WG W-14 289568014 11/1/2011 Ce- 144 8.92E-01 4.90E+00 1.64E+01 U WG W-14 289568014 11/1/2011 Co-57 -1.62E+00 7.30E-01 1.96E+00 U WG W-14 289568014 11/1/2011 Co-58 -1.63E+00 1.17E+00 3.45E+00 U WG W-14 289568014 11/1/2011 Co-60 1.25E+00 1.07E+00 3.72E+00 U WG W-14 289568014 11/1/2011 Cr-51 -6.35E+00 7.88E+00 2.55E+01 U WG W-14 289568014 11/1/2011 Cs-134 2.50E+00 1.36E+00 4.47E+00 U WG W-14 289568014 11/1/2011 Cs-137 2.24E-01 1.03E+00 3.34E+00 U WG W-14 289568014 11/1/2011 Fe-59 1.33E+00 2.3 1E+00 7.68E+00 U WG W-14 289568014 11/1/2011 H-3 2.57E+02 1.78E+02 5.36E+02 U WG W-14 289568014 11/1/2011 1-131 8.30E-01 1.41E+00 4.79E+00 U WG W-14 289568014 11/1/2011 K-40 -4.82E+00 1.50E+01 4.25E+01 U WG W-14 289568014 11/1/2011 La- 140 -8.52E-01 1.75E+00 5.52E+00 U WG W-14 289568014 11/1/2011 Mn-54 6.74E-01 9.66E-01 3.28E+00 U WG W-14 289568014 11/1/2011 Nb-95 -1.91E-02 8.62E-01 2.88E+00 U WG W-14 289568014 11/1/2011 Ru-103 3.22E-01 9.69E-01 3.21E+00 U WG W-14 289568014 11/1/2011 Ru-106 -9.10E-01 7.52E+00 2.41E+01 U WG W-14 289568014 11/1/2011 Sb-124 2.09E+00 2.30E+00 7.95E+00 U WG W-14 289568014 11/1/2011 Sb-125 1.09E+00 2.41E+00 8.08E+00 U WG W-14 289568014 11/1/2011 Se-75 1.29E-01 1.15E+00 3.69E+00 U WG W-14 289568014 11/1/2011 Th-228 1.45E+00 2.20E+00 5.12E+00 U WG W-14 289568014 11/1/2011 Zn-65 -4.25E+00 2.87E+00 6.50E+00 U WG W-14 289568014 11/1/2011 Zr-95 -8.90E-01 1.71E+00 5.56E+00 U WG W-15 289568015 11/2/2011 Ac-228 -6.72E+00 6.23E+00 1.12E+01 U WG W-15 289568015 11/2/2011 Ag-108m -3.54E-01 6.48E-01 2.12E+00 U WG W-15 289568015 11/2/2011 Ag-110m 7.34E-02 7.55E-01 2.50E+00 U WG W-15 289568015 11/2/2011 Ba- 140 6.06E-01 1.21E+00 4.08E+00 U WG W-15 289568015 11/2/2011 Be-7 1.07E+00 6.17E+00 2.08E+01 U WG W-15 289568015 11/2/2011 Ce-I141 -1.35E+00 1.31E+00 4.11E+00 U WG W-15 289568015 11/2/2011 Ce-I144 4.43E+00 5.32E+00 1.76E+01 U WG W-15 289568015 11/2/2011 Co-57 2.42E-01 6.39E-01 2.13E+00 U WG W-15 289568015 11/2/2011 Co-58 -7.62E-01 8.51E-01 2.61E+00 U WG W-15 289568015 11/2/2011 Co-60 1.19E+00 8.60E-01 2.92E+00 U WG W-15 289568015 11/2/2011 Cr-51 -7.77E+00 7.45E+00 2.25E+01 U WG W-15 289568015 11/2/2011 Cs-134 -8.37E-02 9.37E-01 3.05E+00 U WG W-15 289568015 11/2/2011 Cs-137 -1.40E-01 8.50E-01 2.78E+00 U D-190

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG W-15 289568015 11/2/2011 Fe-59 7.26E-01 1.55E+00 5.30E+00 U WG W-15 289568015 11/2/2011 H-3 2.96E+02 1.81E+02 5.37E+02 U WG W-15 289568015 11/2/2011 1-131 -2.36E+00 1.37E+00 3.77E+00 U WG W-15 289568015 11/2/2011 K-40 4.OOE+01 1.49E+01 2.23E+01 WG W-15 289568015 11/2/2011 La-140 6.06E-01 1.21E+00 4.08E+00 U WG W-15 289568015 11/2/2011 Mn-54 -4.93E-01 8.11E-01 2.54E+00 U WG W-15 289568015 11/2/2011 Nb-95 5.06E-01 7.99E-01 2.66E+00 U WG W-15 289568015 11/2/2011 Ru-103 6.06E-02 7.91E-01 2.65E+00 U WG W-15 289568015 11/2/2011 Ru-106 -9.01E-01 7.29E+00 2.40E+01 U WG W-15 289568015 11/2/2011 Sb-124 -4.72E-01 1.94E+00 6.22E+00 U WG W-15 289568015 11/2/2011 Sb-125 -1.15E+00 2.06E+00 6.75E+00 U WG W-15 289568015 11/2/2011 Se-75 -1.43E+00 1.13E+00 3.37E+00 U WG W-15 289568015 11/2/2011 Th-228 -7.70E-01 1.70E+00 4.97E+00 U WG W-15 289568015 11/2/2011 Zn-65 -3.96E+00 1.93E+00 5.03E+00 U WG W-15 289568015 11/2/2011 Zr-95 -1.84E+00 1.38E+00 4.0]E+00 U WG MW-20 289568016 11/1/2011 Ac-228 -2.76E-02 3.3 1E+00 8.81E+00 U WG MW-20 289568016 11/1/2011 Ag-108m -3.90E-01 6.11E-01 1.91E+00 U WG MW-20 289568016 11/1/2011 Ag-110m -4.98E-01 6.OOE-01 1.90E+00 U WG MW-20 289568016 11/1/2011 Ba-140 3.70E-01 1.03E+00 3.5 1E+00 U WG MW-20 289568016 11/1/2011 Be-7 4.36E+00 6.01E+00 1.96E+01 U WG MW-20 289568016 11/1/2011 Ce- 141 1.07E+00 1.30E+00 4.07E+00 U WG MW-20 289568016 11/1/2011 Ce- 144 -1.38E+00 4.75E+00 1.48E+01 U WG MW-20 289568016 11/1/2011 Co-57 6.34E-01 6.10E-01 2.05E+00 U WG MW-20 289568016 11/1/2011 Co-58 1.1OE+00 6.73E-01 2.24E+00 U WG MW-20 289568016 11/1/2011 Co-60 -9.92E-01 8.12E-01 2.30E+00 U WG MW-20 289568016 11/1/2011 Cr-51 -2.73E+00 6.54E+00 2.11E+01 U WG MW-20 289568016 11/1/2011 Cs-134 -4.64E-01 7.78E-01 2.48E+00 U WG MW-20 289568016 11/1/2011 Cs-137 -1.60E-01 6.63E-01 2.19E+00 U WG MW-20 289568016 11/1/2011 Fe-59 -1.56E-02 1.30E+00 4.22E+00 U WG MW-20 289568016 11/1/2011 H-3 2.63E+02 1.82E+02 5.48E+02 U WG MW-20 289568016 11/1/2011 1-131 -1.63E+00 1.19E+00 3.48E+00 U WG MW-20 289568016 11/1/2011 K-40 6.44E+00 1.10E+01 3.36E+01 U WG MW-20 289568016 11/1/2011 La-140 3.70E-01 1.03E+00 3.5 1E+00 U WG MW-20 289568016 11/1/2011 Mn-54 -7.41E-01 6.72E-01 2.03E+00 U WG MW-20 289568016 11/1/2011 Nb-95 7.94E-01 6.77E-01 2.28E+00 U WG MW-20 289568016 11/1/2011 Ru-103 -1.04E+00 7.83E-01 2.25E+00 U WG MW-20 289568016 11/1/2011 Ru-106 7.10E+00 5.74E+00 1.95E+01 U WG MW-20 289568016 11/1/2011 Sb-124 -9.53E-01 1.39E+00 4.27E+00 U WG MW-20 2895680i6 11/1/2011 Sb-125 -1.32E-01 1.86E+00 6.01E+00 U WG MW-20 289568016 11/1/2011 Se-75 1.23E+00 9.52E-01 3.11E+00 U WG MW-20 289568016 11/1/2011 Th-228 1.17E+00 1.66E+00 4.01E+00 U WG MW-20 289568016 11/1/2011 Zn-65 -4.70E+00 1.97E+00 4.4 1E+00 U WG MW-20 289568016 11/1/2011 Zr-95 1.71E+00 1.17E+00 3.93E+00 U WG MW-21 289568017 11/2/2011 Ac-228 1.07E+00 3.99E+00 1.07E+01 U WG MW-21 289568017 11/2/2011 Ag- 108m -8.23E-01 8.60E-01 2.34E+00 U WG MW-21 289568017 11/2/2011 Ag-110m -1.34E-01 7.41E-01 2.45E+00 U WG MW-21 289568017 11/2/2011 Ba- 140 1.40E+00 1.17E+00 3.99E+00 U WG MW-21 289568017 11/2/2011 Be-7 3.39E+00 7.29E+00 2.38E+01 U WG MW-21 289568017 11/2/2011 Ce- 141 -1.07E+00 1.96E+00 5.15E+00 U WG MW-21 289568017 11/2/2011 Ce- 144 -1.63E+00 6.08E+00 1.92E+01 U WG MW-21 289568017 11/2/2011 Co-57 1.04E+00 7.77E-01 2.54E+00 U D-191

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG MW-21 289568017 11/2/2011 Co-58 -2.69E+00 1.27E+00 2.03E+00 U WG MW-21 289568017 11/2/2011 Co-60 -7.22E-01 8.64E-01 2.71 E+00 U WG MW-21 289568017 11/2/2011 Cr-51 -8.35E+00 8.20E+00 2.54E+01 U WG MW-21 289568017 11/2/2011 Cs-134 1.92E+00 9.86E-01 3.16E+00 U WG MVW-21 289568017 11/2/2011 Cs-137 5.24E-02 7.93E-01 2.65E+00 U WG MW-21 289568017 11/2/2011 Fe-59 -1.73E+00 1.50E+00 4.39E+00 U WG MW-21 289568017 11/2/2011 H-3 -1.31E+02 1.56E+02 5.36E+02 U WG MW-21 289568017 11/2/2011 1-131 -1.27E+00 1.33E+00 4.12E+00 U WG MW-21 289568017 11/2/2011 K-40 1.42E+01 1.12E+01 3.35E+01 U WG MW-21 289568017 11/2/2011 La-140 1.40E+00 1.17E+00 3.99E+00 U WG MW-21 289568017 11/2/2011 Mn-54 -5.08E-01 7.81E-01 2.48E+00 U WG MW-21 289568017 11/2/2011 Nb-95 1.36E+00 8.33E-01 2.71E+00 U WG MW-21 289568017 11/2/2011 Ru-103 -1.03E+00 8.46E-01 2.49E+00 U WG MW-21 289568017 11/2/2011 Ru-I106 -5.35E-01 7.01E+00 2.34E+01 U WG MW-21 289568017 11/2/2011 Sb-124 -1.70E+00 1.87E+00 5.65E+00 U WG MW-21 289568017 11/2/2011 Sb-125 -4.16E-01 2.28E+00 7.36E+00 U WG MW-21 289568017 11/2/2011 Se-75 1.64E+00 1.26E+00 4.07E+00 U WG MW-21 289568017 11/2/2011 Th-228 -3.24E+00 2.29E+00 6.12E+00 U WG MW-21 289568017 11/2/2011 Zn-65 8.04E-01 1.69E+00 4.84E+00 U WG MW-21 289568017 11/2/2011 Zr-95 1.3 1E+00 1.30E+00 4.38E+00 U WG SG-1 289568018 11/1/2011 Ac-228 -5.62E+00 4.95E+00 1.49E+01 U WG SG-1 289568018 11/1/2011 Ag-108m 1.52E+00 1.02E+00 3.28E+00 U WG SG-1 289568018 11/1/2011 Ag-110m -2.08E-01 1.05E+00 3.23E+00 U WG SG-1 289568018 11/1/2011 ALPHA 4.19E-02 8.30E-01 2.67E+00 U WG SG-1 289568018 11/1/2011 Ba-140 -3.OOE+00 1.75E+00 4.21E+00 U WG SG-1 289568018 11/1/2011 Be-7 3.58E+00 8.94E+00 3.04E+01 U WG SG-1 289568018 11/1/2011 BETA 4.41 E+00 1.09E+00 2.60E+00 WG SG-1 289568018 11/1/2011 Ce-141 8.80E-01 1.98E+00 6.51E+00 U WG SG-1 289568018 11/1/2011 Ce-144 3.83E+00 7.38E+00 2.5 1E+01 U WG SG-1 289568018 11/1/2011 Co-57 -8.98E-02 9.22E-01 3.13E+00 U WG SG-1 289568018 11/1/2011 Co-58 1.67E-02 9.71E-01 3.16E+00 U WG SG-1 289568018 11/1/2011 Co-60 9.59E-01 1.16E+00 3.98E+00 U WG SG-1 289568018 11/1/2011 Cr-51 8.87E+00 9.93E+00 3.27E+01 U WG SG-1 289568018 11/1/2011 Cs-134 -2.73E+00 1.40E+00 3.47E+00 U WG SG-1 289568018 11/1/2011 Cs-137 -6.01E-01 1.08E+00 3.41E+00 U WG SG-1 289568018 11/1/20 11 Fe-59 -1.30E-01 1.99E+00 6.63E+00 U WG SG-1 289568018 11/1/2011 H-3 -2.66E+00 1.62E+02 5.32E+02 U WG SG-1 289568018 11/1/2011 1-131 1.55E-02 1.84E+00 5.95E+00 U WG SG-1 289568018 11/1/2011 K-40 3.59E+01 1.77E+01 5.23E+01 U WG SG-1 289568018 11/1/2011 La- 140 -3.OOE+00 1.75E+00 4.21E+00 U WG SG-1 289568018 11/1/2011 Mn-54 2.10E+00 1.14E+00 3.72E+00 U WG SG-1 289568018 11/1/2011 Nb-95 9.15E-01 1.09E+00 3.65E+00 U WG SG-1 289568018 11/1/2011 Ru-103 -9.59E-01 1.15E+00 3.63E+00 U WG SG-1 289568018 11/1/2011 Ru-106 -1.36E+01 9.67E+00 2.79E+01 U WG SG-1 289568018 11/1/2011 Sb-124 -8.96E-01 2.34E+00 7.21E+00 U WG SG-1 289568018 11/1/2011 Sb-125 -4.98E+00 3.06E+00 8.24E+00 U WG SG-1 289568018 11/1/2011 Se-75 4.70E-01 1.45E+00 4.79E+00 U WG SG-1 289568018 11/1/2011 Th-228 -4.59E+00 2.84E+00 7.74E+00 U WG SG-1 289568018 11/1/2011 Zn-65 5.79E+00 2.47E+00 7.59E+00 U WG SG-1 289568018 11/1/2011 Zr-95 2.11E+00 1.71E+00 5.79E+00 U WG SG-2 289568019 11/1/2011 Ac-228 -5.75E+00 4.79E+00 1.18E+01 U D-192

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-2 289568019 11/1/2011 Ag-108m 1.73E+00 9.15E-01 2.95E+00 WG SG-2 289568019 11/1/2011 Ag-110m -9.63E-02 8.70E-01 2.83E+00 WG SG-2 289568019 11/1/2011 ALPHA -2.32E-02 8.21E-01 2.65E+00 WG SG-2 289568019 11/1/2011 Ba- 140 -9.12E-01 1.45E+00 4.51E+00 WG SG-2 289568019 11/1/2011 Be-7 -5.65E+00 7.74E+00 2.49E+01 WG SG-2 289568019 11/1/2011 BETA 2.23E+00 8.89E-01 2.30E+00 WG SG-2 289568019 11/1/2011 Ce- 141 4.21E+00 2.16E+00 5.88E+00 WG SG-2 289568019 11/1/2011 Ce- 144 1.05E+01 7.25E+00 2.25E+01 WG SG-2 289568019 11/1/2011 Co-57 -2.28E+00 1.13E+00 2.64E+00 WG SG-2 289568019 11/1/2011 Co-58 1.20E-01 9.05E-01 3.06E+00 WG SG-2 289568019 11/1/2011 Co-60 7.15E-01 9.OOE-01 3.12E+00 WG SG-2 289568019 11/1/2011 Cr-51 1.30E+01 9.94E+00 3.20E+01 WG SG-2 289568019 11/1/2011 Cs-134 1.27E+00 1.1OE+00 3.64E+00 WG SG-2 289568019 11/1/2011 Cs-137 8.21E-01 1.35E+00 3.62E+00 WG SG-2 289568019 11/1/2011 Fe-59 1.86E+00 1.63E+00 5.56E+00 WG SG-2 289568019 11/1/2011 H-3 1.48E+02 1.72E+02 5.37E+02 WG SG-2 289568019 11/1/2011 1-131 -1.32E+00 1.53E+00 4.67E+00 WG SG-2 289568019 11/1/2011 K-40 4.01E+01 1.90E+01 3.18E+01 WG SG-2 .289568019 11/1/2011 La-140 -9.12E-01 1.45E+00 4.5 1E+00 WG SG-2 289568019 11/1/2011 Mn-54 -4.36E-02 8.1OE-01 2.71E+00 WG SG-2 289568019 11/1/2011 Nb-95 1.7]E+00 1.03E+00 3.32E+00 WG SG-2 289568019 11/1/2011 Ru-103 -3.27E+00 1.27E+00 2.93E+00 WG SG-2 289568019 11/1/2011 Ru-106 1.21E+01 9.41E+00 3.1OE+01 WG SG-2 289568019 11/1/2011 Sb-124 -5.57E+00 2.56E+00 5.71E+00 WG SG-2 289568019 11/1/2011 Sb-125 -3.55E+00 2.49E+00 7.53E+00 WG SG-2 289568019 11/1/2011 Se-75 -2.OOE+00 1.56E+00 4.77E+00 WG SG-2 289568019 11/1/2011 Th-228 -3.92E+00 2.73E+00 7.82E+00 WG SG-2 289568019 11/1/2011 Zn-65 -7.01E-01 2.14E+00 5.82E+00 WG SG-2 289568019 11/1/2011 Zr-95 8.82E-02 1.57E+00 5.08E+00 WG SG-4 289568020 11/1/2011 Ac-228 4.14E-01 3.47E+00 1.06E+01 WG SG-4 289568020 11/1/2011 Ag-108m 9.22E-01 7.46E-01 2.49E+00 WG SG-4 289568020 11/1/2011 Ag-110m 6.32E-01 7.54E-01 2.49E+00 WG SG-4 289568020 11/1/2011 ALPHA 1.93E+00 1.34E+00 2.82E+00 WG SG-4 289568020 11/1/2011 Ba-140 -1.35E+00 1.25E+00 3.65E+00 WG SG-4 289568020 11/1/2011 Be-7 -2.19E+00 6.68E+00 2.18E+01 WG SG-4 289568020 11/1/2011 BETA 1.29E+01 1.74E+00 2.36E+00 WG SG-4 289568020 11/1/2011 Ce- 141 -9.74E-01 1.71E+00 4.73E+00 WG SG-4 289568020 11/1/2011 Ce- 144 4.42E+00 5.45E+00 1.82E+01 WG SG-4 289568020 11/1/2011 Co-57 5.70E-01 7.OOE-01 2.35E+00 WG SG-4 289568020 11/1/2011 Co-58 -9.3 1E-01 8.17E-01 2.49E+00 WG SG-4 289568020 11/1/2011 Co-60 2.41 E-0 1 7.3 1E-01 2.41E+00 WG SG-4 289568020 11/1/2011 Cr-51 -3.06E-01 7.52E+00 2.56E+01 wG SG-4 289568020 11/1/2011 Cs-134 7.18E-01 8.86E-01 3.05E+00 WG SG-4 289568020 11/1/2011 Cs-137 -6.43E-01 8.70E-01 2.66E+00 WG SG-4 289568020 11/1/2011 Fe-59 ,2.88E-01 1.50E+00 4.83E+00 WG SG-4 289568020 11/1/2011 H-3 5.35E+01 1.66E+02 5.35E+02 WG SG-4 289568020 11/1/2011 1-131 1.07E+00 1.24E+00 4.22E+00 WG SG-4 289568020 11/1/2011 K-40 1.82E+00 1.43E+01 3.40E+01 WG SG-4 289568020 11/1/2011 La-140 -1.35E+00 1.25E+00 3.65E+00 WG SG-4 289568020 11/1/2011 Mn-54. -8.95E-02 7.37E-01 2.45E+00 WG SG-4 289568020 11/1/2011 Nb-95 5.67E-01 1.02E+00 2.94E+00 D-193

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WG SG-4 289568020 11/1/2011 Ru- 103 -2.47E+00 1.08E+00 2.65E+00 U WG SG-4 289568020 11/1/2011 Ru-106 -6.69E+00 7.15E+00 2.16E+01 U WG SG-4 289568020 11/1/2011 Sb- 124 -1.73E+00 1.74E+00 5.05E+00 U WG SG-4 289568020 11/1/2011 Sb-125 -2.16E+00 2.14E+00 6.66E+00 U WG SG-4 289568020 11/1/2011 Se-75 -5.52E-01 1.07E+00 3.34E+00 U WG SG-4 289568020 11/1/2011 Th-228 1.49E+00 2.39E+00 5.26E+00 U WG SG-4 289568020 11/1/2011 Zn-65 1.24E-01 1.88E+00 5.34E+06 U WG SG-4 289568020 11/1/2011 Zr-95 -1.59E+00 1.40E+00 4.28E+00 U WG SG-5 289568021 11/1/2011 Ac-228 -3.65E+00 3.80E+00 1.04E+01 U WG SG-5 289568021 11/1/2011 Ag-108m -8.99E-01 7.35E-01 2.20E+00 U WG SG-5 289568021 11/1/2011 Ag-110m -3.92E-01 7.22E-01 2.36E+00 U WG SG-5 289568021 11/1/2011 ALPHA 4.84E+00 1.78E+00 2.49E+00 WG SG-5 289568021 11/1/2011 Ba- 140 -2.02E+00 1.26E+00 3.35E+00 U WG SG-5 289568021 11/1/2011 Be-7 -3.20E+00 6.84E+00 2.17E+01 U WG SG-5 289568021 11/1/2011 BETA 4.34E+01 4.24E+00 2.77E+00 WG SG-5 289568021 11/1/2011 Ce- 141 -7.90E-01 1.46E+00 4.59E+00 U WG SG-5 289568021 11/1/2011 Ce- 144 -3.49E+00 5.55E+00 1.74E+01 U WG SG-5 289568021 11/1/2011 Co-57 4.34E-01 6.80E-01 2.20E+00 U WG SG-5 289568021 11/1/2011 Co-58 -8.81E-01 8.10E-01 2.47E+00 U WG SG-5 289568021 11/1/2011 Co-60 -2.09E-02 9.54E-01 2.90E+00 U WG SG-5 289568021 11/1/2011 Cr-51 1.76E+00 7.37E+00 2.46E+01 U WG SG-5 289568021 11/1/2011 Cs-134 -2.47E+00 1.08E+00 2.63E+00 U WG SG-5 289568021 11/1/2011 Cs-137 -9.18E-02 1.01E+00 2.96E+00 U WG SG-5 289568021 11/1/2011 Fe-59 -1.48E+00 1.74E+00 5.28E+00 U WG SG-5 289568021 11/1/2011 H-3 -7.47E+01 1.58E+02 5.34E+02 U WG SG-5 289568021 11/1/2011 1-131 8.65E-01 1.23E+00 4.10E+00 U WG SG-5 289568021 11/1/2011 K-40 1.72E+01 1.76E+01 2.89E+01 U WG SG-5 289568021 11/1/2011 La-140 -2.02E+00 1.26E+00 3.35E+00 U WG SG-5 289568021 11/1/2011 Mn-54 -2.05E+00 8.79E-01 2.09E+00 U WG SG-5 289568021 11/1/2011 Nb-95 -1.32E-02 7.51E-01 2.51E+00 U WG SG-5 289568021 11/1/2011 Ru-I103 -7.48E-01 8.73E-01 2.68E+00 U WG SG-5 289568021 11/1/2011 Ru-106 5.73E+00 7.24E+00 2.36E+01 U WG SG-5 289568021 11/1/2011 Sb-124 -4.62E-01 1.53E+00 4.89E+00 U WG SG-5 289568021 11/1/2011 Sb-125 -1.55E+00 2.23E+00 7.01E+00 U WG SG-5 289568021 11/1/2011 Se-75 -3.36E-01 1.05E+00 3.47E+00 U WG SG-5 289568021 11/1/2011 Th-228 3.18E+00 3.OOE+00 5.53E+00 U WG SG-5 289568021 11/1/2011 Zn-65 6.94E-01 1.86E+00 5.37E+00 U WG SG-5 289568021 11/1/2011 Zr-95 7.16E-01 1.32E+00 4.48E+00 U D-194

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-2 271560001 1/31/2011 Ac-228 9.18E+00 1.48E+01 2.56E+01 U ws SWL-2 271560001 1/31/2011 Ag-108m 1.24E+00 1.50E+00 4.83E+00 U wS SWL-2 271560001 1/31/2011 Ag-i l0m -2.OOE+00 1.73E+00 5.36E+00 U WS SWL-2 271560001 1/31/2011 Ba-140 -5.81E+00 3.96E+00 1.12E+01 U WS SWL-2 271560001 1/31/2011 Be-7 1.90E+01 1.49E+01 4.72E+01 U wS SWL-2 271560001 1/31/2011 Ce- 141 5.32E+00 3.10E+00 9.32E+00 U wS SWL-2 271560001 1/31/2011 Ce- 144 -1.86E+01 1.07E+01 3.02E+01 U WS SWL-2 271560001 1/31/2011 Co-57 -2.10E+00 1.35E+00 3.93E+00 U ws SWL-2 271560001 1/31/2011 Co-58 3.46E-01 1.84E+00 6.05E+00 U wS SWL-2 271560001 1/31/2011 Co-60 2.13E+00 1.79E+00 5.93E+00 U wS SWL-2 271560001 1/31/2011 Cr-51 -3.43E+00 1.61E+01 5.27E+01 U WS SWL-2 271560001 1/31/2011 Cs-134 1.66E+00 2.06E+00 6.77E+00 U wS SWL-2 271560001 1/31/2011 Cs-137 4.74E+00 2.111E+00 6.33E+00 U wS SWL-2 271560001 1/31/2011 Fe-59 -3.33E+00 3.76E+00 1.19E+01 U wS SWL-2 271560001 1/31/2011 1-131 -2.60E+00 3.78E+00 1.20E+01 U wS SWL-2 271560001 1/31/2011 K-40 -3.03E+01 3.64E+01 8.00E+01 U wS SWL-2 271560001 1/31/2011 La-140 -5.81 E+00 3.95E+00 1.12E+01 U WS SWL-2 271560001 1/31/2011 Mn-54 -8.38E-01 1.72E+00 5.47E+00 U wS SWL-2 271560001 1/31/2011 Nb-95 1.21E+00 1.80E+00 5.93E+00 U wS SWL-2 271560001 1/31/2011 Ru-103 - 1.16E+00 1.84E+00 6.06E+00 U wS SWL-2 271560001 1/31/2011 Ru-106 -1.26E-01 1.43E+01 4.75E+01 U wS SWL-2 271560001 1/31/2011 Sb-124 3.98E+00 4.33E+00 1.47E+01 U wS SWL-2 271560001 1/31/2011 Sb-125 -1.66E+00 4.56E+00 1.46E+01 U ws SWL-2 271560001 1/31/2011 Se-75 -1.30E+00 2.13E+00 6.95E+00 U wS SWL-2 271560001 1/31/2011 Th-228 3.76E+00 5.81E+00 1.07E+01 U ws SWL-2 271560001 1/31/2011 Zn-65 3.87E+00 3.97E+00 1.17E+0 1 U wS SWL-2 271560001 1/31/2011 Zr-95 8.12E-01 3.28E+00 1.08E+01 U ws SWL-3 271560002 1/31/2011 Ac-228 4.66E+01 1.38E+01 2.52E+01 UI wS SWL-3 271560002 1/31/2011 Ag-108m 8.50E-01 1.60E+00 5.32E+00 U wS SWL-3 271560002 1/31/2011 Ag-I l0m -3.38E+00 1.84E+00 5.08E+00 U wS SWL-3 271560002 1/31/2011 Ba- 140 5.75E+00 4.06E+00 1.32E+01 U ws SWL-3 271560002 1/31/2011 Be-7 1.83E+01 1.60E+01 5.22E+01 U WS SWL-3 271560002 1/31/2011 Ce- 141 1.11E+01 3.87E+00 9.78E+00 UI WS SWL-3 271560002 1/31/2011 Ce- 144 -1.25E+01 1.03E+01 3.16E+01 U WS SWL-3 271560002 1/31/2011 Co-57 3.08E-01 1.33E+00 4.33E+00 U wS SWL-3 271560002 1/31/2011 Co-58 1.59E+00 1.85E+00 6.00E+00 U wS SWL-3 271560002 1/31/2011 Co-60 -6.40E-01 1.90E+00 6.15E+00 U ws SWL-3 271560002 1/31/2011 Cr-51 -2.96E-01 1.65E+01 5.511E+0 1 U ws SWL-3 271560002 1/31/2011 Cs-134 2.48E+00 2.20E+00 7.111+00 U wS SWL-3 271560002 1/31/2011 Cs-137 1.38E+00 1.80E+00 5.90E+00 U WS SWL-3 271560002 1/31/2011 Fe-59 -7.69E-03 3.63E+00 1.21E+01 U ws SWL-3 271560002 1/31/2011 1-131 -1.79E+00 4.04E+00 1.33E+01 U wS SWL-3 271560002 1/31/2011 K-40 '8.43E+01 3.00E+01 8.25E+01 UI wS SWL-3 271560002 1/31/2011 La-140 5.75E+00 4.06E+00 1.32E+01 U wS SWL-3 271560002 1/31/2011 Mn-54 -5.72E-01 1.89E+00 6.03E+00 U wS SWL-3 271560002 1/31/2011 Nb-95 2.43E-01 1.88E+00 6.111E+00 U wS SWL-3 271560002 1/31/2011 Ru-103 -1.56E+00 1.97E+00 6.25E+00 U wS SWL-3 271560002 1/31/2011 Ru-106 -9.56E+00 1.63E+01 5.19E+01 U wS SWL-3 271560002 1/31/2011 Sb-124 -7.08E+00 4.85E+00 1.37E+01 U wS SWL-3 271560002 1/31/2011 Sb-125 -3.72E+00 4.81E+00 1.55E+01 U WS SWL-3 271560002 1/31/2011 Se-75 -1.36E+00 2.20E+00 7.26E+00 U D-195

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-3 271560002 1/31/2011 Th-228 8.43E+00 5.70E+00 1.I1E+01 U WS SWL-3 271560002 1/31/2011 Zn-65 -2.22E+00 3.83E+00 1.24E+01 U wS SWL-3 271560002 1/31/2011 Zr-95 -3.46E+00 3.56E+00 1.09E+01 U wS SWL-2 275043003 3/31/2011 H-3 1.11 E+02 1.64E+02 5.21E+02 U wS SWL-3 275043004 3/31/2011 H-3 1.38E+02 1.65E+02 5.20E+02 U wS SWL-2 275043001 3/31/2011 Ac-228 -4.08E+00 4.93E+00 9.87ED00 U wS SWL-2 275043001 3/31/2011 Ag-108m -1. 17E-01 5.54E-01 1.78E+00 U wS SWL-2 275043001 3/31/2011 Ag-110m -1.40E+00 6.96E-01 1.89E+00 U wS SWL-2 275043001 3/31/2011 Ba- 140 -1.53E+00 1.69E+00 5.11E+00 U wS SWL-2 275043001. 3/31/2011 Be-7 -1.93E+00 5.98E+00 1.90E+01 U wS SWL-2 275043001 3/31/2011 Ce- 141 6.3.3E-01 1.20E+00 3.66E+00 U wS SWL-2 275043001 3/31/2011 Ce-144 -6.09E-01 3.70E+00 1.18E+01 U WS SWL-2 275043001 3/31/2011 Co-57 2.88E-01 5.04E-01 1.62E+00 U wS SWL-2 275043001 3/31/2011 Co-58 8.02E-01 6.68E-01 2.20E+00 U wS SWL-2 275043001 3/31/2011 Co-60 1.66E-02 6.27E-01 2.07E+00 U wS SWL-2 275043001 3/31/2011 Cr-51 7.72E+00 6.52E+00 2.12E+01 U wS SWL-2 275043001 3/31/2011 Cs-134 -1.57E-01 7.50E-01 2.44E+00 U WS SWL-2 275043001 3/31/2011 Cs-137 1.86E+00 8.08E-01 2.45E+00 U ws SWL-2 275043001 3/31/2011 Fe-59 1.31E+00 1.43E+00 4.86E+00 U wS SWL-2 275043001 3/31/2011 1-131 1.65E+00 1.66E+00 5.40E+00 U wS SWL-2 275043001 3/31/2011 K-40 4.22E+01 1.30E+01 2.54E+01 U' wS SWL-2 275043001 3/31/2011 La-140 -1.53E+00 1.69E+00 5.11E+00 U ws SWL-2 275043001 3/31/2011 Mn-54 3.68E-01 6.05E-01 2.OOE+00 U wS SWL-2 275043001 3/31/2011 Nb-95 4.20E-01 7.06E-0 1 2.35E+00 U WS SWL-2 275043001 3/31/2011 Ru-103 -7.01E-01 7.66E-01 2.33E+00 U wS SWL-2 275043001 3/31/2011 Ru-106 -5.19E+00 5.69E+00 1.80E+01 U wS SWL-2 275043001 3/31/2011 Sb-124 -9.50E-01 1.64E+00 5.04E+00 U wS SWL-2 275043001 3/31/2011 Sb-125 1.70E+00 1.71E+00 5.54E+00 U wS SWL-2 275043001 3/31/2011 Se-75 6.06E-01 8.06E-01 2.68E+00 U wS SWL-2 275043001 3/31/2011 Th-228 4.77E-02 1.76E+00 4.31E+00 U wS SWL-2 275043001 3/31/2011 Zn-65 -2.79E-01 1.43E+00 4.74E+00 U ws SWL-2 275043001 3/31/2011 Zr-95 5.86E-01 1.15E+00 3.82E+00 U wS. SWL-3 275043002 3/31/2011 Ac-228 -1.37E+00 3.62E+00 7.84E+00 U wS SWL-3 275043002 3/31/2011 Ag-108m -7.67E-01 5.20E-01 1.51E+00 U wS SWL-3 275043002 3/31/2011 Ag-1 10m -4.29E-01 5.32E-01 1.69E+00 U wS SWL-3 275043002 3/31/2011 Ba- 140 -9.56E-01 1.32E+00 4.06E+00 U ws SWL-3 275043002 3/31/2011 Be-7 1.07E+01 5.83E+00 1.78E+01 U wS SWL-3 275043002 3/31/2011 Ce- 141 9.37E-01 1.10E+00 3.50E+00 U WS SWL-3 275043002 3/31/2011 Ce-144 2.01E+00 3.59E+00 1.16E+01 U ws SWL-3 275043002 3/31/2011 Co-57 -5.42E-02 4.60E-01 1.48E+00 U wS SWL-3 275043002 3/31/2011 Co-58 -5.28E-02 5.86E-01 1.91E+00 U wS SWL-3 275043002 3/31/2011 Co-60 -1.25E-01 6.11E-01 1.99E+00 U wS SWL-3 275043002 3/31/2011 Cr-51 5.34E-01 5.76E+00 1.91E+01 U wS SWL-3 275043002 3/31/2011 Cs-134 -1.29E+00 7.68E-01 2.17E+00 U wS SWL-3 275043002 3/31/2011 Cs-137 7.87E-02 5.64E-01 1.88E+00 U ws SWL-3 275043002 3/31/2011 .Fe-59 1.90E+00 1.31E+00 4.34E+00 U wS SWL-3 275043002 3/31/2011 1-131 -3.54E-02 1.49E+00 4.87E+00 U ws SWL-3 275043002 3/31/2011 k-40 -2.06E-01 1.17E+01 2.70E+01 U WS SWL-3 275043002 3/31/2011 La-140 -9.56E-01 1.32E+00 4.06E+00 U wS SWL-3 275043002 3/31/2011 Mn-54 3.99E-01 5.52E-01 1.82E+00 U ws SWL-3 275043002 3/31/2011 Nb-95 6.18E-01 5.95E-01 1.96E+00 U D-196

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-3 275043002 3/31/2011 Ru-103 1.06E-01 6.62E-01 2.13E+00 U ws SWL-3 275043002 3/31/2011 Ru-106 -1.04E+01 5.59E+00 1.58E+01 U wS SWL-3 275043002 3/31/2011 Sb-124 -1. 14E+00 1.61E+00 5.15E+00 U wS SWL-3 275043002 3/31/2011 , Sb-125 1.35E-01 1.52E+00 4.92E+00 U ws SWL-3 275043002 3/31/2011 Se-75 -3.57E-01 7.44E-01 2.44E+00 U wS SWL-3 275043002 3/31/2011 Th-228 3.06E-01 1.94E+00 4.13E+00 U wS SWL-3 275043002 3/31/2011 Zn-65 6.27E-01 1.18E+00 3.98E+00 U wS SWL-3 275043002 3/31/2011 Zr-95 -1.22E+00 1.09E+00 3.34E+00 U wS SWL-2 277245001 4/30/2011 Ac-228 -4.3 1E-01 3.82E+00 9.45E+00 U wS SWL-2 277245001 4/30/2011 Ag-108m -7.19E-01 6.52E-01 2.04E+00 U wS SWL-2 277245001 4/30/2011 Ag-Il0m 7.92E-01 6.49E-0 I 2.12E+00 U wS SWL-2 277245001 4/30/2011 Ba- 140 -6.71E-01 2.25E+00 7.15E+00 U wS SWL-2 277245001 4/30/2011 Be-7 8.13E+00 7.18E+00 2.37E+01 U wS SWL-2 277245001 4/30/2011 Ce- 141 4.88E+00 2.16E+00 5.84E+00 U wS SWL-2 277245001 4/30/2011 Ce-i144 -1.02E+00 5.30E+00 1.74E+01 U wS SWL-2 277245001 4/30/2011 Co-57 2.72E-01 6.90E-01 2.29E+00 U WS SWL-2 277245001 4/30/2011 Co-58 4.73E-02 7.28E-01 2.35E+00 U wS SWL-2 277245001 4/30/2011 Co-60 1.25E+00 7.07E-01 2.3 1E+00 U wS SWL-2 277245001 4/30/2011 Cr-51 -8.96E-01 9.09E+00 3.06E+01 U wS SWL-2 277245001 4/30/2011 Cs-134 -7.65E-01 8.30E-01 2.52E+00 U ws SWL-2 277245001 4/30/2011 Cs-137 -4.36E-01 6.71E-01 2.12E+00 U wS SWL-2 277245001 4/30/2011 Fe-59 -1.06E-01 1.57E+00 5.19E+00 U wS SWL-2 277245001 4/30/2011 1-131 -2.13E+00 3.53E+00 1.16E+01 U wS SWL-2 277245001 4/30/2011 K-40 -9.18E+00 1.04E+01 3.02E+01 U wS SWL-2 277245001 4/30/2011 La-140 -6.7 1E-01 2.25E+00 7.15E+00 U wS SWL-2 277245001 4/30/2011 Mn-54 -8.25E-01 6.83E-01 2.01E+00 U WS SWL-2 277245001 4/30/2011 Nb-95 3.58E-01 7.53E-01 2.47E+00 U WS SWL-2 277245001 4/30/2011 Ru-103 -6.15E-01 8.95E-01 2.87E+00 U wS SWL-2 277245001 4/30/2011 Ru-106 9.65E-01 6.23E+00 2.05E+01 U wS SWL-2 277245001 4/30/2011 Sb-124 -1.87E+00 1.88E+00 5.54E+00 U WS SWL-2 277245001 4/30/2011 Sb-125 1.93E+00 1.95E+00 6.48E+00 U wS SWL-2 277245001 4/30/2011 Se-75 4.07E-01 1.07E+00 3.47E+00 U wS SWL-2 277245001 4/30/2011 Th-228 -3.82E+00 2.32E+00 5.27E+00 U wS SWL-2 277245001 4/30/2011 Zn-65 -5.10E-01 1.49E+00 4.85E+00 U wS SWL-2 277245001 4/30/2011 Zr-95 -6.83E-01 1.29E+00 4.07E+00 U wS SWL-3 277245002 4/30/2011 Ac-228 -8.33E+00 4.90E+00 1.12E+O01 U wS SWL-3 277245002 4/30/2011 Ag-108m 9.70E-02 7.41E-01 2.41E+00 U wS WS SWL-3 277245002 4/30/2011 Ag-l10m -5.70E-01 9.22E-01 2.95E+00 U wS SWL-3 277245002 4/30/2011 Ba-140 -9.64E-01 3.05E+00 9.64E+00 U wS SWL-3 277245002 4/30/2011 Be-7 2.88E+00 9.47E+00 3.07E+01 U wS SWL-3 277245002 4/30/2011 Ce-I141 1.77E+00 .1.96E+00 5.97E+00 U ws SWL-3 277245002 4/30/2011 Ce- 144 -2.99E+00 5.50E+00 1.73E+01 U WS SWL-3 277245002 4/30/2011 Co-57 -3.12E-01 7.08E-01 2.25E+00 U WS SWL-3 277245002 4/30/2011 Co-58 2.35E-02 9.53E-01 3.13E+00 U WS SWL-3 277245002 4/30/2011 Co-60 -3.98E-01 1.03E+00 3.3 1E+00 U wS SWL-3 277245002 4/30/2011 Cr-51 -3.52E+00 1.05E+01 3.41E+O01 U wS SWL-3 277245002 4/30/2011 Cs-134 1.99E+00 1.21E+00 3.99E+00 U wS WS SWL-3 277245002 4/30/2011 Cs-137 1.15E+00 1.01E+00 3.38E+00 U wS SWL-3 277245002 4/30/2011 Fe-59 -1.85E+00 2.39E+00 7.52E+00 U wS SWL-3 277245002 4/30/2011 1-131 5.86E+00 4.89E+00 1.60E+01 U SWL-3 277245002 4/30/2011 K-40 2.33E+01 1.20E+01 3.97E+01 U D-197

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCiKL) (pCi/L)

WS SWL-3 277245002 4/30/2011 La-140 -9.64E-01 3.05E+00 9.64E+00 U ws SWL-3 277245002 4/30/2011 Mn-54 2.78E-01 8.70E-01 2.89E+00 U WS SWL-3 277245002 4/30/2011 Nb-95 -7.03E-01 1.02E+00 3.19E+00 U ws SWL-3 277245002 4/30/2011 Ru-103 -4.84E-01 1.24E+00 3.90E+00 U ws SWL-3 277245002 4/30/2011 Ru-106 3.12E-01 7.59E+00 2.54E+01 U wS SWL-3 277245002 4/30/2011 Sb-124 -1.59E+00 2.69E+00 8.16E+00 U WS SWL-3 277245002 4/30/2011 Sb-125 -2. 1OE+00 2.33E+00 7.08E+00 U WS SWL-3 277245002 4/30/2011 Se-75 -7.17E-01 1.20E+00 3.90E+00 U WS SWL-3 277245002 4/30/20 11 Th-228 1.56E+00 2.82E+00 6.15E+00 U WS SWL-3 277245002 4/30/2011 Zn-65 -3.90E+00 2.28E+00 6.27E+00 U WS SWL-3 277245002 4/30/2011 Zr-95 -2.10E+00 1.81E+00 5.34E+00 U wS SWL-2 279178001 5/31/2011 Ac-228 5.02E-01 4.14E+00 9.39E+00 U wS SWL-2 279178001 5/31/2011 Ag-108m -6.35E-01 5.85E-01 1.78E+00 U wS SWL-2 279178001 5/31/2011 Ag-I lOm -1.38E+00 7.09E-01 1.97E+00 U WS SWL-2 279178001 5/31/2011 Ba- 140 9.75E-01 1.73E+00 5.86E+00 U wS SWL-2 279178001 5/31/2011 Be-7 6.12E-01 6.07E+00 1.98E+01 U WS SWL-2 279178001 5/31/2011 Ce- 141 -3.72E+00 1.67E+00 4.33E+00 U WS SWL-2 279178001 5/31/2011 Ce- 144 6.34E+00 4.61E+00 1.43E+01 U wS SWL-2 279178001 5/31/2011 Co-57 -2.70E-01 5.88E-01 1.87E+00 U wS SWL-2 279178001 5/31/2011 Co-58 1.20E+00 7.31E-01 2.39E+00 U WS SWL-2 279178001 5/31/2011 Co-60 -4.75E-01 1.1OE+00 3.03E+00 U wS SWL-2 279178001 5/31/2011 Cr-51 -7.06E+00 7.73E+00 2.45E+01 U wS SWL-2 279178001 5/31/2011 Cs-134 6.17E-01 7.76E-01 2.61E+00 U ws SWL-2 279178001 5/31/2011 Cs-137 2.22E+00 8.60E-01 2.52E+00 U WS SWL-2 279178001 5/31/2011 Fe-59 -1.82E+00 1.54E+00 4.52E+00 U ws SWL-2 279178001 5/31/2011 1-131 1.76E+00 2.95E+00 9.75E+00 U WS SWL-2 279178001 5/31/2011 K-40 2.83E+00 1.10E+01 1.95E+01 U WS SWL-2 279178001 5/31/2011 La-140 9.75E-01 1.73E+00 5.86E+00 U WS SWL-2 279178001 5/31/2011 Mn-54 -1.63E+00 7.36E-01 1.87E+00 U WS SWL-2 279178001 5/31/2011 Nb-95 1.06E+00 7.64E-01 2.53E+00 U wS SWL-2 279178001 5/31/2011 Ru- 103 -6.91E-01 8.57E-01 2.65E+00 U WS SWL-2 279178001 5/31/2011 Ru-106 4.58E-01 5.45E+00 1.84E+01 U WS SWL-2 279178001 5/31/2011 Sb-124 -7.48E-01 1.76E+00 5.62E+00 U WS SWL-2 279178001 5/31/2011 Sb-125 6.75E-01 1.73E+00 5.68E+00 U WS SWL-2 279178001 5/31/2011 Se-75 3.74E-01 8.54E-01 2.87E+00 U WS SWL-2 279178001 5/31/2011 Th-228 3.77E+00 2.11E+00 4.30E+00 U wS SWL-2 279178001 5/31/2011 .Zn-65 -7.21E-01 1.50E+00 4.03E+00 U ws SWL-2 279178001 5/31/2011 Zr-95 -1.87E+00 1.29E+00 3.81E+00 U wS SWL-3 279178002 5/31/2011 Ac-228 1.22E-01 3.82E+00 1.01E+01 U ws SWL-3 279178002 5/31/2011 Ag-108m 3.31E-01 6.26E-01 2.10E+00 U wS SWL-3 279178002 5/31/2011 Ag-il0m 1.56E-01 6.66E-01 2.19E+00 U wS SWL-3 279178002 5/31/2011 Ba- 140 -9.65E-01 2.13E+00 6.68E+00 U wS SWL-3 279178002 5/31/2011 Be-7 5.53E+00 7.36E+00 2.45E+01 U ws SWL-3 279178002 5/31/2011 Ce- 141 1.96E-02 1.80E+00 5.91E+00 U wS SWL-3 279178002 5/31/2011 Ce- 144 -1.20E+01 6.18E+00 1.74E+01 U wS SWL-3 279178002 5/31/2011 Co-57 -5.58E-02 7.19E-01 2.38E+00 U WS SWL-3 279178002 5/31/2011 Co-58 3.88E-01 7.38E-01 2.42E+00 U wS SWL-3 279178002 5/31/2011 Co-60 7.82E-01 6.53E-01 2.20E+00 U ws SWL-3 279178002 5/31/2011 Cr-51 3.83E+00 9.13E+00 3.09E+01 U WS SWL-3 279178002 5/31/2011 Cs-134 1.04E-01 8.38E-01 2.72E+00 U wS SWL-3 279178002 5/31/2011 Cs-137 3.22E-02 7.07E-01 2.31E+00 U D-198

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WS SWL-3 279178002 5/31/2011 Fe-59 -3.20E+00 1.82E+00 5.03E+00 U wS SWL-3 279178002 5/31/2011 1-131 -5.41E-01 3.52E+00 1.18E+01 U WS SWL-3 279178002 5/31/2011 K-40 9.62E+00 1.44E+01 2.02E+01 U wS SWL-3 279178002 5/31/2011, La-140 -9.65E-01 2.13E+00 6.68E+00 U WS SWL-3 279178002 5/31/2011 Mn-54 3.30E-01 6.87E-01 2.24E+00 U WS SWL-3 279178002 5/31/2011 Nb-95 6.OOE-01 7.77E-01 2.55E+00 U WS SWL-3 279178002 5/31/2011 Ru-I103 -1.32E+00 9.44E-01 2.82E+00 U WS SWL-3 279178002 5/31/2011 Ru- 106 1.15E+00 6.43E+00 2.12E+01 U wS SWL-3 279178002 5/31/2011 Sb-124 -1.97E+00 1.96E+00 5.77E+00 U wS SWL-3 279178002 5/31/2011 Sb-125 -4.74E-01 1.92E+00 6.35E+00 U wS SWL-3 279178002 5/31/2011 Se-75 -1.34E+00 1.20E+00 3.65E+00 U WS SWL-3 279178002 5/31/2011 Th-228 3.91E+00 2.32E+00 5.72E+00 U wS SWL-3 279178002 5/31/2011 Zn-65 -2.54E+00 1.54E+00 4.32E+00 U WS SWL-3 279178002 5/31/2011 Zr-95 -1.22E+00 1.44E+00 4.41E+00 U wS SWL-2 281133002 6/30/2011 H-3 9.68E+01 1.38E+02 4.39E+02 U WS SWL-3 281133004 6/30/2011 H-3 4.88E+01 1.34E+02 4.34E+02 U wS SWL-2 281133001 6/30/2011 Ac-228 -6.17E+00 3.54E+00 8.19E+00 U WS SWL-2 281133001 6/30/2011 Ag-108m -2.61E-01 5.06E-01 1.61E+00 U WS SWL-2 281133001 6/30/2011 Ag-110m -4.64E+00 1.29E+00 1.90E+00 U ws SWL-2 281133001 6/30/2011 Ba-140 -5.01E+00 3.OOE+00 8.18E+00 U wS SWL-2 281133001 6/30/2011 Be-7 5.09E+00 6.59E+00 2.14E+01 U wS SWL-2 281133001 6/30/2011 Ce-I141 -6.59E-01 1.59E+00 4.83E+00 U WS SWL-2 281133001 6/30/2011 Ce- 144 -4.17E+00 4.19E+00 1.29E+-01 U wS SWL-2 281133001 6/30/2011 Co-57 -3.98E-02 5.47E-01 1.78E+00 U WS SWL-2 281133001 6/30/2011 Co-58 -1.18E+00 7.47E-01 2.14E+00 U wS SWL-2 281133001 6/30/2011 Co-60 9.96E-01 7.30E-01 2.43E+00 U wS SWL-2 281133001 6/30/2011 Cr-51 7.36E+00 8.70E+00 2.88E+01 U wS SWL-2 281133001 6/30/2011 Cs-134 4.11E-01 6.85E-01 2.29E+00 U wS SWL-2 281133001 6/30/2011 Cs-137 -7.04E-02 1.07E+00 2.81E+00 U WS SWL-2 281133001 6/30/2011 Fe-59 1.57E+00 1.65E+00 5.38E+00 U wS SWL-2. 281133001 6/30/2011 1-131 -3.54E+00 4.67E+00 1.49E+01 U WS SWL-2 281133001 6/30/2011 K-40 5.36E+00 1.18E+01 2.5 1E+01 U ws SWL-2 281133001 6/30/2011 La-140 -5.01E+00 3.OOE+00 8.18E+00 U wS SWL-2 281133001 6/30/2011 Mn-54 4.33E-01 6.28E-01 2.09E+00 U WS SWL-2 281133001 6/30/2011 Nb-95 5.62E-01 6.65E-01 2.22E+00 U wS SWL-2 281133001 6/30/2011 Ru-103 -2.18E+00 1.04E+00 2.71E+00 U wS SWL-2 281133001 6/30/2011 Ru-106 4.01E+00 5.58E+00 1.89E+01 U wS SWL-2 281133001 6/30/2011 Sb-124 -1.68E+00 1.86E+00 5.59E+00 U ws SWL-2 281133001 6/30/2011 Sb-125 1.90E+00 1.65E+00 5.36E+00 U wS SWL-2 281133001 6/30/2011 Se-75 4.40E-01 8.68E-01 2.92E+00 U wS SWL-2 281133001 6/30/2011 Th-228 4.40E+00 2.24E+00 3.99E+00 U1 wS SWL-2 281133001 6/30/2011 Zn-65 4.52E-01 1.49E+00 4.84E+00 U wS SWL-2 281133001 6/30/2011 Zr-95 1.11E+00 1.21E+00 4.06E+00 U wS SWL-3 281133003 6/30/2011 Ac-228 -6.40E+00 4.85E4-00 9.27E+00 U wS SWL-3 281133003 6/30/2011 Ag-108m 1.92E-01 5.83E-01 1.89E+00 U WS SWL-3 281133003 6/30/2011 Ag-1 I10m -1.31E-01 6.03E-01 1.98E+00 U ws SWL-3, 281133003 6/30/2011 Ba- 140 3.49E+00 3.OOE+00 1.02E+01 U wS SWL-3 281133003 6/30/2011 Be-7 -7.45E+00 7.33E+00 2.21E+01 U wS SWL-3 281133003 6/30/2011 Ce- 141 3.21E+00 1.89E+00 5.70E+00 U wS SWL-3 281133003 6/30/2011 Ce-I144 -3.96E+00 4.74E+00 1.47E+01 U wS SWL-3 281133003 6/30/2011 Co-57 1.30E+00 6.75E-01 2.01E+00 U D-199

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) ws SWL-3 281133003 6/30/2011 Co-58 2.27E-01 6.98E-01 2.29E+00 wS SWL-3 281133003 6/30/2011 Co-60 6.OOE-01 7.28E-01 2.42E+00, wS SWL-3 281133003 6/30/2011 Cr-51 3.23E-01 9.73E+00 3.20E+01 ws SWL-3 281133003 6/30/2011 Cs-134 1.18E+00 8.25E-01 2.67E+00 ws SWL-3 281133003 6/30/2011 Cs-137 2.1OE-01 6.22E-01 2.07E+00 wS SWL-3 281133003 6/30/2011 Fe-59 -7.81E-01 1.59E+00 5.14E+00 WS SWL-3 281133003 6/30/2011 1-131 -1.06E+00 5.02E+00 1.63E+01 WS SWL-3 281133003 6/30/2011 K-40 -9.68E+00 1.13E+01 3.02E+01 ws SWL-3 281133003 6/30/2011 La-140 3.49E+00 3.OOE+00 1.02E+01 ws SWL-3 281133003 6/30/2011 Mn-54 -7.29E-01 6.61E-01 1.99E+00 ws SWL-3 281133003 6/30/2011 Nb-95 7.63E-01 8.04E-01 2.64E+00 WS SWL-3 281133003 6/30/2011 Ru-103 3.95E-01 8.72E-01 2.96E+00 wS SWL-3 281133003 6/30/2011 Ru-106 -7.15E-01 5.56E+00 1.84E+01 wS SWL-3 281133003 6/30/2011 Sb-124 5.59E-01 1.77E+00 5.99E+00 ws SWL-3 281133003 6/30/2011 Sb-125 5.96E-01 1.85E+00 6.OOE+00 ws SWL-3 281133003 6/30/2011 Se-75 8.29E-01 1.03E+00 3.42E+00 wS SWL-3 281133003 6/30/2011 Th-228 -5.75E+00 2.30E+00 4.37E+00 wS SWL-3 281133003 6/30/2011 Zn-65 -1.08E+00 1.54E+00 4.91 E+00 ws SWL-3 281133003 6/30/2011 Zr-95 -1.47E-01 1.28E+00 4.18E+00 wS SWL-2 283166001 7/31/2011 Ac-228 -9.46E-01 4.08E+00 8.56E+00 WS SWL-2 283166001 7/31/2011 Ag-108m -2.99E-01 5.55E-01 1.81E+00 wS SWL-2 283166001 7/31/2011 Ag-110m 9.69E-01 6.52E-01 2.09E+00 WS SWL-2 283166001 7/31/2011 Ba- 140 8.23E-01 1.97E+00 6.48E+00 ws SWL-2 283166001 7/31/2011 Be-7 1.27E+01 7.04E+00 2.21E+01 wS SWL-2 283166001 7/31/2011 Ce-I141 3.77E+00 1.90E+00 5.49E+00 ws SWL-2 283166001 7/31/2011 Ce- 144 8.43E-01 4.97E+00 1.64E+01 ws SWL-2 283166001 7/31/2011 Co-57 1.31E+00 7.11E-01 2.17E+00 ws SWL-2 283166001 7/31/2011 Co-58 -1.24E+00 7.48E-01 2.09E+00 wS SWL-2 283166001 7/31/2011 Co-60 9.79E-01 8.37E-01 2.27E+00 wS SWL-2 283166001 7/31/2011 Cr-51 -1.99E+00 7.86E+00 2.64E+01 wS SWL-2 283166001 7/31/2011 Cs-134 2.26E-01 7.26E-01 2.37E+00 wS SWL-2 283166001 7/31/2011 Cs-137 -1.65E-01 6.52E-01 2.11E+00 wS SWL-2 283166001 7/31/2011 Fe-59 2.20E+00 1.44E+00 4.73E+00 wS SWL-2 283166001 7/31/2011 1-131 3.24E+00 3.13E+00 1.04E+01 wS SWL-2 283166001 7/31/2011 K-40 -1.08E+01 1.04E+01 2.72E+01 wS SWL-2 283166001 7/31/2011 La-140 8.23E-01 1.97E+00 6.48E+00 wS SWL-2 283166001 7/31/2011 Mn-54 -2.59E-01 6.34E-01 2.01E+00 ws SWL-2 283166001 7/31/2011 Nb-95 4.54E-01 7.33E-01 2.39E+00 ws SWL-2 283166001 7/31/2011 Ru-103 1.84E+00 9.22E-01 2.82E+00 ws SWL-2 283166001 7/31/2011 Ru- 106 -7.42E+00 5.81 E+00 1.75E+01 ws SWL-2 283166001 7/31/2011 Sb-124 1.40E+00 1.61E+00 5.34E+00 ws SWL-2 283166001 7/31/2011 Sb-125 -1.60E+00 1.78E+00 5.69E+00 ws SWL-2 283166001 7/31/2011 Se-75 -9.67E-01 1.03E+00 3.16E+00 wS SWL-2 283166001 7/31/2011 Th-228 2.03E+00 2.48E+00 4.96E+00 wS SWL-2 283166001 7/31/2011 Zn-65 -2.65E+00 1.55E+00 4.40E+00 wS SWL-2 283166001 7/31/2011 Zr-95 1.34E+00 1.30E+00 4.21E+00 WS SWL-3 283166002 7/31/2011 Ac-228 -7.27E+00 3.69E+00 7.56E+00 WS SWL-3 283166002 7/31/2011 Ag-108m 6.34E-01 5.10E-01 1.66E+00 wS SWL-3 283166002 7/31/2011 Ag-I 10M 7.81E-01 5.43E-01 1.74E+00 WS SWL-3 283166002 7/31/2011 Ba- 140 -1.27E+00 2.88E+00 5.36E+00 WS SWL-3 283166002 7/31/2011 Be-7 6.68E+00 5.52E+00 1.80E+01 D-200

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L)

WS SWL-3 283166002 7/31/2011 Ce- 141 7.32E-01 1.24E+00 4.02E+00 U WS SWL-3 283166002 7/31/2011 Ce- 144 -1.50E+00 3.93E+00 1.26E+01 U WS SWL-3 283166002 7/31/2011 Co-57 -2.27E-01 4.92E-01 1.58E+00 U ws SWL-3 283166002 7/31/2011 Co-58 7.89E-02 5.40E-01 1.82E+00 U ws SWL-3 283166002 7/31/2011 Co-60 -2.05E-01 8.41E-01 2.00E+00 U ws SWL-3 283166002 7/31/2011 Cr-51 -5.36E+00 6.45E+00 2.08E+01 U WS SWL-3 283166002 7/31/2011 Cs-134 9.01E-01 8.16E-01 2.26E+00 U WS SWL-3 283166002 7/31/2011 Cs-137 1.82E-01 5.31E-01 1.72E+00 U ws SWL-3 283166002 7/31/2011 Fe-59 2.12E+00 1.44E+00 4.711E+00 U wS SWL-3 283166002 7/31/2011 1-131 1.06E+00 2.45E+00 8.22E+00 U ws SWL-3 283166002 7/31/2011 K-40 4.10E+00 1.16E+01 1.89E+01 U ws SWL-3 283166002 7/31/2011 La-140 -1.27E+00 2.88E+00 5.36E+00 U WS SWL-3 283166002 7/31/2011 Mn-54 -2.02E-02 5.35E-01 1.79E+00 U WS SWL-3 283166002 7/31/2011 Nb-95 9.20E-02 5.84E-01 1.98E+00 U wS SWL-3 283166002 7/31/2011 Ru-103 -1.34E+00 7.54E-01 2.10E+00 U WS SWL-3 283166002 7/31/2011 Ru-106 2.15E+00 4.86E+00 1.58E+01 U WS SWL-3 283166002 7/31/2011 Sb-124 2.13E+00 1.45E+00 4.94E+00 U WS SWL-3 283166002 7/31/2011 Sb-125 9.89E-01 1.43E+00 4.76E+00 U WS SWL-3 283166002 7/31/2011 Se-75 2.83E-01 7.82E-01 2.66E+00 U ws SWL-3 283166002 7/31/2011 Th-228 4.16E-01 1.52E+00 3.68E+00 U WS SWL-3 283166002 7/31/2011 Zn-65 7.85E-01 1.17E+00 3.90E+00 U ws SWL-3 283166002 7/31/2011 Zr-95 1.56E+00 1.41 E+00 3.83E+00 U wS SWL-2 285174001 8/31/2011 Ac-228 -8.04E-01 4.21 E+00 8.71 E+00 U ws SWL-2 285174001 8/31/2011 Ag-108m 1.31E-01 5.53E-01 1.78E+00 U WS SWL-2 285174001 8/31/2011 Ag-Il0m 1.22E-01 5.59E-01 1.86E+00 U wS SWL-2 285174001 8/31/2011 Ba- 140 2.71 E+00 2.35E+00 7.79E+00 U wS SWL-2 285174001 8/31/2011 Be-7 -1.05E+00 6.39E+00 2.14E+01. U wS SWL-2 285174001 8/31/2011 Ce- 141 2.05E+00 1.79E+00 5.25E+00 U ws SWL-2 285174001 8/31/2011 Ce- 144 -6.54E+00 4.59E+00 1.43E+01 U WS SWL-2 285174001 8/31/2011 Co-57 6.80E-01 5.80E-01 1.92E+00 U wS SWL-2 285174001 8/31/2011 Co-58 -1.75E+00 8.31E-01 2.15E+00 U wS SWL-2 285174001 8/31/2011 Co-60 -4.23E-01 6.68E-01 2.11 E+00 U wS SWL-2 285174001 8/31/2011 Cr-51 -1.01E+01 9.07E+00 2.78E+01 U ws SWL-2 285174001 8/31/2011 Cs-134 7.66E-01 7.92E-01 2.60E+00 U ws SWL-2 285174001 8/31/2011 Cs-137 -4.07E-01 5.81E-01 1.85E+00 U wS SWL-2 285174001 8/31/2011 Fe-59 -2.24E+00 1.56E+00 4.58E+00 U wS SWL-2 285174001 8/31/2011 1-131 -4.60E-01 4.29E+00 1.38E+01 U wS SWL-2 285174001 8/31/2011 K-40 6.92E+00 1.24E+01 2.16E+01 U wS SWL-2 285174001 8/31/2011 La- 140 2.71E+00 2.35E+00 7.79E+00 U wS SWL-2 285174001 8/31/2011 Mn-54 5.23E-01 6.38E-01 2.09E+00 U wS SWL-2 285174001 8/31/2011 Nb-95 7.76E-01 7.54E-01 2.47E+00 U wS SWL-2 285174001 8/31/2011 Ru- 103 -1.65E+00 9.46E-01 2.75E+00 U wS SWL-2 285174001 8/31/2011 Ru-106 -7.18E-01 5.15E+00 1.70E+01 U ws SWL-2 285174001 8/31/2011 Sb-124 4.09E-01 1.79E+00 5.85E+00 U wS SWL-2 .285174001 8/31/2011 Sb-125 1.15E+00, 1.63E+00 5.24E+00 U WS SWL-2 285174001 8/31/2011 Se-75 2.42E-02 9.36E-01 3.08E+00 U WS SWL-2 285174001 8/31/2011 Th-228 1.35E+00 2.30E+00 4.58E+00 U WS SWL-2 285174001 8/31/2011 Zn-65 -1.82E+00 1.38E+00 3.611E+00 U wS SWL-2. 285174001 8/31/2011 Zr-95 -1.60E+00 1.30E+00 3.88E+00 U WS SWL-3 285174002 8/31/2011 Ac-228 1.85E-01 3.17E+00 6.86E+00 U WS 285174002 SWL-3 8/31/2011 Ag-108m 6.20E-01 4.56E-01 1.45E+00 U D-201

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-3 285174002 8/31/2011 Ag-110m -4.17E-01 4.59E-01 1.46E+00 wS SWL-3 285174002 8/31/2011 Ba- 140 -1.70E+00 1.99E+00 6.22E+00 WS SWL-3 285174002 8/31/2011 Be-7 -1.23E+00 5.19E+00 1.66E+01 wS SWL-3 285174002 8/31/2011 Ce- 141 3.03E-01 1.19E+00 4.02E+00 WS SWL-3 285174002 8/31/2011 Ce- 144 -3.16E+00 3.75E+00 1.08E+01 WS SWL-3 285174002 8/31/2011 Co-57 -2.84E-01 4.32E-01 1.43E+00 WS SWL-3 285174002 8/31/2011 Co-58 1.55E-02 5.46E-01 1.81E+00 wS SWL-3 285174002 8/31/2011 Co-60 1.01E+00 5.56E-01 1.77E+00 WS SWL-3 285174002 8/31/2011 Cr-51 5.5 1E+00 6.97E+00 2.29E+01 WS SWL-3 285174002 8/31/2011 Cs-134 4.71E-01 5.70E-01 1.91E+00 wS SWL-3 285174002 8/31/2011 Cs-137 -3.24E-01 4.75E-01 1.54E+00 WS SWL-3 285174002 8/31/2011 Fe-59 -8.49E-01 1.34E+00 4.22E+00 wS SWL-3 285174002 8/31/2011 1-131 3.06E+00 3.42E+00 1.11E+01 wS SWL-3 285174002 8/31/2011 K-40 -1.02E+01 8.67E+00 2.11E+01 WS SWL-3 285174002 8/31/2011 La- 140 -1.70E+00 1.99E+00 6.22E+00 WS SWL-3 285174002 8/31/2011 Mn-54 - 1. 19E+00 5.55E-01 1.45E+00 wS SWL-3 285174002 8/31/2011 Nb-95 -1.60E+00 9.72E-01 1.75E+00 WS SWL-3 285174002 8/31/2011 Ru-I103 -2.72E+00 9.62E-01 2.01E+00 wS SWL-3 285174002 8/31/2011 Ru-106 -2.72E+00 4.43E+00 1.45E+01 ws SWL-3 285174002 8/31/2011 Sb-124 -6.24E-01 1.47E+00 4.74E+00 WS SWL-3 285174002 8/31/2011 Sb-125 - 1. 16E+00 1.35E+00 4.18E+00 WS SWL-3 285174002 8/31/2011 Se-75 -1.17E-01 7.01E-01 2.3 1E+00 WS SWL-3 285174002 8/31/2011 Th-228 -2.18E+00 1.44E+00 3.42E+00 wS SWL-3 285174002 8/31/2011 Zn-65 - 1.19E+00 1.11E+00 3.33E+00 wS SWL-3 285174002 8/31/2011 Zr-95 -6.87E-01 9.53E-01 3.05E+00 WS SWL-2 287229002 9/30/2011 H-3 3.88E+02 1.61E+02 4.55E+02 WS SWL-3 287229004 9/30/2011 H-3 3.78E+02 1.57E+02 4.43E+02 wS SWL-2 287229001 9/30/2011 Ac-228 -7.18E-01 3.68E+00 9.22E+00 WS SWL-2 287229001 9/30/2011 Ag-108m 1.04E-01 5.60E-01 1.90E+00 wS SWL-2 287229001 9/30/2011 Ag-110m 7.03E-01 6.76E-01 2.21E+00 WS SWL-2 287229001 9/30/2011 Ba- 140 -1.59E+00 2.38E+00 7.50E+00 wS SWL-2 287229001 9/30/2011 Be-7 -6.73E+00 6.89E+00 2.19E+01 wS SWL-2 287229001 9/30/2011 Ce- 141 -3.41E+00 2.44E+00 5.28E+00 WS SWL-2 287229001 9/30/2011 Ce- 144 3.41E+00 4.82E+00 1.54E+01 WS SWL-2 287229001 9/30/2011 Co-57 -5.27E-01 6.39E-01 1.99E+00 WS SWL-2 287229001 9/30/2011 Co-58 1.61E-01 6.89E-01 2.33E+00 WS SWL-2 287229001 9/30/2011 Co-60 2.23E-01 7.12E-01 2.41E+00 WS SWL-2 287229001 9/30/2011 Cr-51 -9.06E-01 8.77E+00 2.85E+01 WS SWL-2 287229001 9/30/2011 Cs-134 1.67E+00 8.26E-01 2.55E+00 wS SWL-2 287229001 9/30/2011 Cs-137 -1.41E+00 7.69E-01 2.13E+00 wS SWL-2 287229001 9/30/2011 Fe-59 5.92E-01 1.61E+00 5.35E+00 WS SWL-2 287229001 9/30/2011 1-131 -2.59E+00 4.02E+00 1.27E+01 WS SWL-2 287229001 9/30/2011 K-40 -1.95E+01 1.30E+01 2.92E+01 WS SWL-2 287229001 9/30/2011 La-140 -1.59E+00 2.38E+00 7.50E+00 WS SWL-2 287229001 9/30/2011 Mn-54 1.77E-02 6.20E-01 2.08E+00 WS SWL-2 287229001 9/30/2011 Nb-95 -5.65E-02 1.04E+00 2.48E+00 wS SWL-2 287229001 9/30/2011 Ru-103 7.98E-02 8.26E-01 2.77E+00 WS SWL-2 287229001 9/30/2011 Ru-106 3.79E+00 5.86E+00 1.94E+01 wS SWL-2 287229001 9/30/2011 Sb-124 -2.04E+00 1.86E+00 5.54E+00 wS SWL-2 287229001 9/30/2011 Sb-125 2.14E+00 1.78E+00 5.92E+00 WS SWL-2 287229001 9/30/2011 Se-75 -5.04E-01 9.81E-01 3.19E+00 D-202

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) ws SWL-2 287229001 9/30/2011 Th-228 4.5 1E+00 2.85E+00 4.79E+00 U WS SWL-2 287229001 9/30/2011 Zn-65 -2.43E+00 1.62E+00 4.68E+00 U ws wS SWL-2 287229001 9/30/2011 Zr-95 -2.04E+00 1.32E+00 3.72E+00 U, WS SWL-3 287229003 9/30/2011 Ac-228 1.01E+01 5.33E+00 9.91E+00 UI wS SWL-3 287229003 9/30/2011 Ag-108m -1. 1OE+00 6.18E-01 1.71E+00 U WS SWL-3 287229003 9/30/2011 Ag-Il0m -1.47E-01 6.63E-01 1.89E+00 U ws SWL-3 287229003 9/30/2011 Ba- 140 1.10E+00 2.47E+00 8.13E+00 U WS SWL-3 287229003 9/30/2011 Be-7 9.82E-01 6.84E+00 2.21E+01 U wS SWL-3 287229003 9/30/2011 Ce- 141 2.22E+00 1.63E+00 5.09E+00 U ws SWL-3 287229003 9/30/2011 Ce-i144 3.16E+00 4.86E+00 1.40E+01 U WS SWL-3 287229003 9/30/2011 Co-57 -6.95E-01 5.90E-01 1.80E+00 U WS SWL-3 287229003 9/30/2011 Co-58 -4.68E-01 7.45E-01 2.35E+00 U wS SWL-3 287229003 9/30/2011 Co-60 -4.62E-01 9.33E-01 2.38E+00 U wS SWL-3 287229003 9/30/2011 Cr-51 6.06E+00 8.68E+00 2.87E+01 U wS SWL-3 287229003 9/30/2011 Cs-134 1.15E+00 7.39E-01 2.39E+00 U wS SWL-3 287229003 9/30/2011 Cs-137 6.84E-01 1.22E+00 2.07E+00 U wS SWL-3 287229003 9/30/2011 Fe-59 3.91E-01 1.51E+00 5.07E+00 U wS SWL-3 287229003 9/30/2011 1-131 5.63E+00 3.95E+00 1.26E+01 U wS SWL-3 287229003 9/30/2011 K-40 2.75E+01 1.39E+01 1.98E+01 UI wS SWL-3 287229003 9/30/2011 La-140 1.10E+00 2.47E+00 8.13E+00 U wS SWL-3 287229003 9/30/2011 Mn-54 4.23E-02 6.44E-01 2.1OE+00 U wS SWL-3 287229003 9/30/2011 Nb-95 -3.76E-01 1.69E+00 2.76E+00 U wS SWL-3 287229003 9/30/2011 Ru-103 -5.48E-01 8.65E-01 2.69E+00 U wS SWL-3 287229003 9/30/2011 Ru-106 -5.09E+00 5.91E+00 1.88E+01 U wS SWL-3 287229003 9/30/2011 Sb-124 -8.82E-01 1.73E+00 5.58E+00 U WS WS SWL-3 287229003 9/30/2011 Sb-125 1.72E+00- 1.81E+00 5.85E+00 U SWL-3 287229003 9/30/2011 Se-75 9.19E-02 9.28E-01 3.1OE+00 U SWL-3 287229003 9/30/2011 Th-228 1.98E+00 1.96E+00 3.82E+00 U

.ws WS SWL-3 287229003 9/30/2011 Zn-65 9.48E-01 1.56E+00 4.59E+00 U wS SWL-3 287229003 9/30/2011 Zr-95 -1.44E-01 1.22E+00 3.99E+00 U ws SWL-2 289368001 10/31/2011 Ac-228 2.62E+00 6.OOE+00 8.79E+00 U wS SWL-2 289368001 10/31/2011 Ag-108m 9.27E-01 6.02E-01 1.87E+00 U wS SWL-2 289368001 10/31/2011 Ag-I l0m -1.09E-01 5.55E-01 1.82E+00 U wS SWL-2 289368001 10/31/2011 Ba- 140 2.77E+,00 2.29E+00 7.53E+00 U WS SWL-2 289368001 10/31/2011 Be-7 -3.47E+00 5.88E+00 1.93E+01 U WS WS SWL-2 289368001 10/31/2011 Ce-i141 3.16E+00 1.72E+00 .4.80E+00 U ws SWL-2 289368001 10/31/2011 Ce- 144 1.42E+00 4.30E+00 1.41E+01 U SWL-2 289368001 10/31/2011 Co-57 -1.46E-01 5.53E-01 1.87E+00 U ws SWL-2 289368001 10/31/2011 Co-58 -2.71E+00 1.59E+00 2.31E+00 U ws SWL-2 289368001 10/31/2011 Co-60 3.83E-01 6.11E-01 2.05E+00 U WS SWL-2 289368001 10/31/2011 Cr-51 1.29E+01 8.63E+00 2.72E+01 U WS SWL-2 289368001 10/31/2011 Cs-134 1.55E+00 8.02E-01 2.50E+00 U wS SWL-2 289368001 10/31/2011 Cs-137 7.84E-01 6.17E-01 2.03E+00 U WS WS SWL-2 289368001 10/31/2011 Fe-59 2.02E+00 1.45E+00 4.81E+00 U wS SWL-2 289368001 10/31/2011 1-131 1.93E+00 3.49E+00 1.13E+01 U ws SWL-2 289368001 10/31/2011 K-40 6.88E+00 1.36E+01 2.21E+01 U WS SWL-2 289368001 10/31/2011 La-140 2.77E+00 2.28E+00 7.53E+00 U wS SWL-2 289368001 10/31/2011 Mn-54 5.09E-01 6.20E-01 2.03E+00 U wS SWL-2 289368001 10/31/2011 Nb-95 1.64E+00 8.30E-01 2.56E+00 U WS wS SWL-2 289368001 10/31/2011 Ru-103 -1.52E+00 8.38E-01 2.40E+00 U SWL-2 289368001 10/31/2011 Ru-106 -7.02E+00 5.75E+00 1.76E+01 U D-203

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION, LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-2 289368001 10/31/2011 Sb-124 8.21E-01 1.50E+00 4.96E+00 U wS SWL-2 289368001 10/31/2011 Sb-125 -9.92E-03 1.68E+00 5.38E+00 U wS SWL-2 289368001 10/31/2011 Se-75 1.45E+00 9.56E-01 3.03E+00 U ws SWL-2 289368001 10/31/2011 Th-228 -5.63E-01 1.76E+00 4.56E+00 U wS SWL-2 289368001 10/31/2011 Zn-65 8.59E-01 1.39E+00 4.618E+00 U wS SWL-2 289368001 10/31/2011 Zr-95 1.40E+00 1.23E+00 4.02E+00 U wS SWL-3 289368002 10/31/2011 Ac-228 -1.82E+00 3.48E+00 8.17E+00 U wS SWL-3 289368002 10/31/2011 Ag-108m 4.68E-01 4.91E-01 1.59E+00 U wS SWL-3 289368002 10/31/2011 Ag-Il0m -4.22E-01 6.14E-01 1.69E+00 U wS SWL-3 289368002 10/31/2011 Ba- 140 1.66E-01 2.11E+00 6.83E+00 U wS SWL-3 289368002 10/31/2011 Be-7 -3.22E+00 5.77E+00 1.81E+01 U wS SWL-3 289368002 10/31/2011 Ce- 141 -1.09E+00 1.75E+00 4.08E+00 U WS SWL-3 289368002 10/31/2011 Ce- 144 2.88E+00 3.82E+00 1.23E+01 U WS SWL-3 289368002 10/31/2011 Co-57 -6.16E-02 4.74E-01 1.53E+00 U wS SWL-3 289368002 10/31/2011 Co-58 4.74E-01 5.88E-01 1.94E+00 U WS SWL-3 289368002 10/31/2011 Co-60 1.73E-01 5.59E-01 1.86E+00 U WS SWL-3 289368002 10/31/2011 Cr-51 4.67E+00 7.47E+00 2.47E+01 U WS SWL-3 289368002 10/31/2011 Cs-134 -1.82E-01 6.91E-01 2.24E+00 U wS SWL-3 289368002 10/31/2011 Cs-137 4.78E-01 1.09E+00 1.76E+00 U wS SWL-3 289368002 10/31/2011 Fe-59 -2.14E-01 1.40E+00 4.65E+00 U WS SWL-3 289368002 10/31/2011 1-131 6.87E+00 3.33E+00 1.00E+01 U WS SWL-3 289368002 10/31/2011 K-40 -2.37E+00 1.18E+01 2.61 E+01 U WS SWL-3 289368002 10/31/2011 La-140 1.66E-01 2.11E+00 6.83E+00 U wS SWL-3 289368002 10/31/2011 Mn-54 -3.26E-02 5.46E-01 1.78E+00 U wS SWL-3 289368002 10/31/2011 Nb-95 -6.29E-01 6.29E-01 1.94E+00 U wS SWL-3 289368002 10/31/2011 Ru-103 1.47E-01 8.42E-01 2.36E+00 U WS SWL-3 289368002 10/31/2011 Ru-106 -1.83E+00 4.70E+00 1.54E+01 U wS SWL-3 289368002 10/31/2011 Sb-124 9.11E-01 1.63E+00 5.55E+00 U wS SWL-3 289368002 10/31/2011 Sb-125 -2.52E-01 1.56E+00 5.01E+00 U wS SWL-3 289368002 10/31/2011 Se-75 -8.46E-01 8.33E-01 2.65E+00 U wS SWL-3 289368002 10/31/2011 Th-228 2.OOE+00 2.05E+00 4.15E+00 U wS SWL-3 289368002 10/31/2011 Zn-65 2.96E-01 1.19E+00 3.99E+00 U WS SWL-3 289368002 10/31/2011 Zr-95 4.28E-01 1.08E+00 3.58E+00 U wS SWL-2 291303001 11/30/2011 Ac-228 -2.07E+00 3.34E+00 8.30E+00 U ws SWL-2 291303001 11/30/2011 Ag- 108m 5.33E-01 5.03E-01 1.68E+00 U wS SWL-2 291303001 11/30/2011 Ag-1 10m 1.91E-01 5.74E-01 1.89E+00 U wS SWL-2 291303001 11/30/2011 Ba- 140 -4.83E-02 2.211E+00 7.30E+00 U wS SWL-2 291303001 11/30/2011 Be-7 -4.51E+00 6.09E+00 1.97E+01 U wS SWL-2 291303001 11/30/2011 Ce- 141 1.61E+00 1.7]E+00 4.82E+00 U WS SWL-2 291303001 11/30/2011 Ce- 144 -1.48E+00 4.37E+00 1.39E+01 U WS SWL-2 291303001 11/30/2011 Co-57 -9.99E-01 6.30E-01 1.83E+00 U wS SWL-2 291303001 11/30/2011 Co-58 3.45E-01 6.51E-01 2.2 1E+00 U wS SWL-2 291303001 11/30/2011 Co-60 3.58E-01 6.17E-01 2.10E+00 U wS SWL-2 291303001 11/30/2011 ,Cr-51 2.11E+00 8.03E+00 2.63E+01 U wS SWL-2. 291303001 11/30/2011 Cs-134 -5.56E-02 7.19E-01 2.311E+00 U WS SWL-2 291303001 11/30/2011 Cs-137 -3.66E-02 5.90E-01 1.92E+00 U wS SWL-2 291303001 11/30/2011 Fe-59 -1.66E+00 1.59E+00 4.87E+00 U wS SWL-2 291303001 11/30/2011 1-131 6.75E-01 3.46E+00 1.12E+01 U wS SWL-2 291303001 11/30/2011 K-40 -1.07E+01 1.08E+01 3.OOE+01 U ws SWL-2 291303001 11/30/2011 La-140 -4.83E-02 2.21E+00 7.30E+00 U WS SWL-2 291303001 11/30/2011 Mn-54 -1.03E+00 6.02E-01 1.74E+00 U D-204

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-2 291303001 11/30/2011 Nb-95 5.17E-0 I 7.20E-01 2.34E+00 wS SWL-2 291303001 11/30/2011 Ru-103 -8.40E-01 8.10E-01 2.56E+00 wS SWL-2 291303001 11/30/2011 Ru-106 -1.00E+01 5.84E+00 1.66E+01 ws SWL-2 291303001 11/30/2011 Sb-124 -3.46E+00 1.89E+00 5.02E3+00 wS SWL-2 291303001 11/30/2011 Sb-125 2.18E+00 1.59E+00 5.25E+00 wS SWL-2 291303001 11/30/2011 Se-75 -4.82E-01 8.96E-01 2.91E+00 wS SWL-2 291303001 11/30/2011 Th-228 1.91E+00 2.15E+00 4.13E+00 wS SWL-2 291303001 11/30/2011 Zn-65 8.88E-02 1.35E+00 4.43E+00 ws SWL-2 291303001 11/30/2011 Zr-95 1.80E-01 1.24E+00 4.01E+00 wS SWL-3 291303002 11/30/2011 Ac-228 1.80E+00 4.04E+00 1.01E+01 wS SWL-3 291303002 11/30/2011 Ag-108m 1.26E-01 5.71E-01 1.85E+00 WS SWL-3 291303002 11/30/2011 Ag-110m -2.1IE-01 5.89E-01 1.92E+00 wS SWL-3 291303002 11/30/2011 Ba- 140 -4.30E+00 2.41E+00 6.56E+00 wS SWL-3 291303002 11/30/2011 Be-7 -4.80E+00 7.03E+00 2.18E+01 wS SWL-3 291303002 11/30/2011 Ce- 141 2.36E+00 1.71E+00 5.30E+00 wS SWL-3 291303002 11/30/2011 Ce- 144 6.87E+00 4.88E+00 1.51E+01 WS Ws SWL-3 291303002 11/30/2011 Co-57 1.41E-01 5.89E-01 1.91E+00 SWL-3 291303002 11/30/2011 Co-58 -1.62E-01 6.81E-01 2.19E+00 ws wS SWL-3 291303002 11/30/2011 Co-60 -3.91E-01 6.64E-01 2.09E+00 wS SWL-3 291303002 11/30/2011 Cr-51 1.83E+00 8.86E+00 2.92E+01 wS SWL-3 291303002 11/30/2011 Cs-134 2.34E+00 9.29E-01 2.71E+00 wS SWL-3 291303002 11/30/2011 Cs-137 4.OOE-01 6.45E-01 2.15E+00 wS SWL-3 291303002 11/30/2011 Fe-59 2.44E+00 1.64E+00 5.42E+00 wS SWL-3 291303002 11/30/2011 1-131 4.77E+00 3.97E+00 1.28E+01 wS SWL-3 291303002 11/30/2011 K-40 -5.97E+00 1.10E+01 2.811E+01 WS SWL-3 291303002 11/30/2011 La-140 -4.30E+00 2.40E+00 6.56Et00 wS SWL-3 291303002 11/30/2011 Mn-54 2.11E-02 6.44E-01 2.09E+00 wS SWL-3 291303002 11/30/2011 Nb-95 -2.87E-01 7.63E-01 2.46E+00 wS SWL-3 291303002 11/30/2011 Ru-I103 -1.85E+00 9.42E-01 2.65E+00 wS SWL-3 291303002 11/30/2011 Ru-106 2.29E+00 5.54E+00 1.86E+01 wS SWL-3 291303002 11/30/2011 Sb- 124 -9.83E-01 1.87E+00 6.02E+00 wS SWL-3 291303002 11/30/2011 Sb-125 4.58E-01 1.73E+00 5.61E+00 SWL-3 291303002 11/30/2011 Se-75 -3.46E-02 9.21E-01 3.06E+00 ws wS SWL-3 291303002 11/30/2011 Th-228 2.81E+00 2.01E+00 4.62E+00 WS SWL-3 291303002 11/30/2011 Zn-65 -8.55E-01 1.38E+00 4.43E+00 wS SWL-3 291303002 11/30/2011 Zr-95 -5.44E-02 1.28E+00 4.18E+00 wS SWL-2 293321002 12/31/2011 H-3 3.35E+02 1.96E+02 5.79E+02 wS SWL-3 293321004 12/31/2011 H-3 -1.23E+02 1.74E+02 5.93E+02 wS SWL-2 293321001 12/31/2011 Ac-228 5.84E+00 4.12E+00 7.68E+00 ws SWL-2 293321001 12/31/2011 Ag-108m -4.69E-01 4.84E-01 1.51E+00 SWL-2 293321001 12/31/2011 Ag-110m -9.97E-01 6.31E-01 1.60E+00 ws wS SWL-2 293321001 12/31/2011 Ba-140 -7.40E-01 1.89E+00 6.111E+00 wS SWL-2 293321001 12/31/2011 Be-7 5.86E+00 5.56E+00 1.81E+01 wS SWL-2 293321001 12/31/2011 Ce- 141 -5.58E+00 2.29E+00 3.95E+00 WS SWL-2 293321001 12/31/2011 Ce- 144 -3.1IE-01 3.56E+00 1.16E+01 WS ws SWL-2 293321001 12/31/2011 Co-57 -4.33E-01 4.72E-01 1.49E+00 SWL-2 293321001 12/31/2011 Co-58 -5.19E-01 5.58E-01 1.75E+00 ws SWL-2 293321001 12/31/2011 Co-60 1.46E-03 4.78E-01 1.60E+00 WS SWL-2 293321001 12/31/2011 Cr-51 -8.37E+00 6.99E+00 2.19E+01 wS SWL-2 293321001 12/31/2011 Cs-134 5.79E-01 6.24E-01 2.09E+00 wS SWL-2 293321001 12/31/2011 Cs-137 1.90E-01 1.12E+00 1.62E+00 D-205

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 SAMPLE END CONC STD.DEV. MDC FLAGS TYPE STATION LSN DATE NUCLIDE (pCi/L) (pCi/L) (pCi/L) wS SWL-2 293321001 12/31/2011 Fe-59 -1.35E+00 1.35E+00 4.08E+00 wS SWL-2 293321001 12/31/2011 1-131 -5.41E+00 4.27E+00 1.05E+01 wS SWL-2 293321001 12/31/2011 K-40 6.48E+00 9.16E+00 2.52E+01 wS SWL-2 293321001 12/31/2011 La-140 -7.40E-01 1.89E+00 6.11E+00 wS SWL-2 293321001 12/31/2011 Mn-54 -3.10E-01 5.11E-01 1.65E+00 wS SWL-2 293321001 12/31/2011 Nb-95 2.64E-01 6.12E-01 2.06E+00 wS SWL-2 293321001 12/31/2011 Ru-103 1.40E+00 8.50E-01 2.38E+00 wS SWL-2 293321001 12/31/2011 Ru- 106 -8.21E-01 4.99E+00 1.59E+01 wS SWL-2 .293321001 12/31/2011 Sb- 124 -1.48E+00 1.53E+00 4.62E+00 wS SWL-2 293321001 12/31/2011 Sb-125 -5.98E-02 1.44E+00 4.73E+00 wS SWL-2 293321001 12/31/2011 Se-75 -8:64E-01 1.04E+00 2.46E+00 wS SWL-2 293321001 12/31/2011 Th-228 -7.39E-01 1.72E+00 3.68E+00 wS SWL-2 293321001 12/31/2011 Zn-65 -1.73E+00 1.20E+00 3.43E+00 wS SWL-2 293321001 12/31/2011 Zr-95 8.11E-01 1.07E+00 3.59E+00 wS SWL-3 293321003 12/31/2011 Ac-228 -2.23E+00 3.3 1E+00 7.53E+00 ws SWL-3 293321003 12/31/2011 Ag-108m -1.34E-01 4.64E-01 1.55E+00 ws SWL-3 293321003 12/31/2011 Ag-I 10m -4.96E-01 5.29E-01 1.65E+00 ws SWL-3 293321003 12/31/2011 Ba- 140 1.66E+00 1.84E+00 6.13E+00 ws SWL-3 293321003 12/31/2011 Be-7 -2.86E+00 5.64E+00 1.85E+01 ws SWL-3 293321003 12/31/2011 Ce-I141 8.91E-01 1.41E+00 4.15E+00 ws SWL-3 293321003 12/31/2011 Ce- 144 -7.22E+00 3.97E+00 1.16E+01 ws SWL-3 293321003 12/31/2011 Co-57 9.25E-01 5.17E-01 1.62E+00 ws SWL-3 .293321003 12/31/2011 Co-58 8.28E-01 6.64E-01 2.15E+00 ws SWL-3 293321003 12/31/2011 Co-60 -2.47E-02 5.72E-01 1.88E+00 ws SWL-3 293321003 12/31/2011 Cr-51 -5.61 E+00 7.69E+00 2.41E+01 ws SWL-3 293321003 12/31/2011 Cs-134 2.08E-01 6.09E-01 2.OOE+00 ws SWL-3 293321003 12/31/2011 Cs-137 -8.48E-01 5.88E-01 1.73E+00 ws SWL-3 293321003 12/31/2011 Fe-59 2.42E+00 1.55E+00 5.07E+00 ws SWL-3 293321003 12/31/2011 1-131 1.86E+00 3.40E+00 1.10E+01 ws SWL-3 293321003 12/31/2011 K-40 2.48E+01 8.47E+00 2.33E+01 ws SWL-3 293321003 12/31/2011 La-140 1.66E+00 1.84E+00 6.13E+00 ws SWL-3 293321003 12/31/2011 Mn-54 6.14E-01 5.96E-01 1.94E+00 ws SWL-3 293321003 12/31/2011 Nb-95 -4.17E-02 6.37E-01 2.07E+00 ws SWL-3 293321003 12/31/2011 Ru-103 -2.89E-01 7.32E-01 2.41E+00 ws SWL-3 293321003 12/31/2011 Ru-106 -3.30E+00 4.67E+00 1.49E+01 ws SWL-3 293321003 12/31/2011 Sb-124 2.99E-01 1.47E+00 4.79E+00 ws SWL-3 293321003 12/31/2011 Sb-125 2.11E+00 1.49E+00 4.89E+00 ws SWL-3 293321003 12/31/2011 Se-75 7.78E-01 8.09E-01 2.62E+00 wS wS SWL-3 293321003 12/31/2011 Th-228 5.69E+00 2.60E+00 3.99E+00 wS SWL-3 293321003 12/31/2011 Zn-65 -1. 19E+00 1.11E+00 3.42E+00 SWL-3 293321003 12/31/2011 Zr-95 -1.66E+00 1.17E+00 3.41E+00 U: Target isotope was analyzed for but not detected above the MDC and LLD.

UI: Uncertain identification for gamma spectroscopy.

X: Lab-specific qualifier (see data summary package for narrative).

M: Reported result is less than the LLD and greater than the MDC.

DL: Measured MDC is greater than the LLD.

D-206

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 APPENDIX E PRE-OPERATIONAL RADIOLOGICAL MONITORING PROGRAM E-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Donald C. Cook Nuclear Plant Pre-Operational Radiological Monitoring Program Summary This appendix details information obtained during the conduct of a Pre-Operational Radiological Monitoring Program (PRMP) at the Donald C. Cook Nuclear Plant (CNP) from August 1971 until the initial criticality of Unit 1 on January 18, 1975. Program-related samples were analyzed by the Eberline Instrument Corporation and a summary of these results are presented below. This information was utilized during the evaluation of CNP's 2011 Radiological Environmental Monitoring Program sample data and allowed for the comparison of current and historical information.

Air Samples:

Gross beta radioactivity in PRMP air particulate filters ranged from 0.01 to 0.17 pCi/m3 from mid-1971 until mid-1 973. In June of 1973 and 1974, the People's Republic of China detonated several nuclear devices in the atmosphere. As a result, PRMP gross beta radioactivity results up to 0.45 pCi/m3 were documented with no statistically significant difference noted between indicator and control stations. By the end of the pre-operational period, gross beta values were approximately 0.06 pCi/m3.

Analysis of composited PRMP air particulate filters detected "trace amounts" of fission product nuclides Ce-144, Ru-103, Ru-106, Zr-95 and Nb-95. The presence of these nuclides was attributed to previously conducted atmospheric nuclear tests. Cosmogenically produced Be-7 was also identified during the analysis of these air particulate filters.

Direct Radiation:

Direct radiation (background) as measured by PRMP thermoluminescent dosimeters ranged between 1.0 and 2.0 mrem per week.

Milk Samples:

Gamma ray spectroscopy of PRMP milk samples was conducted and naturally-occurring K-40 was detected in the range of 520 to 2310 pCi/liter. Cs-1 37 was detected in many milk samples following the atmospheric nuclear test discussed above. Cs-137 radioactivity ranged from 8 to 33 pCi/liter. 1-131 was noted in four milk samples collected on 7/9/74 with values ranging from 0.2 to 0.9 pCi/liter.

Lake Water Samples:

PRMP lake water samples collected were analyzed for tritium and by gamma ray spectroscopy.

Tritium activities were below 1000 pCi/liter and typically averaged about 400 pCi/liter. No nuclides were detected by gamma ray spectroscopy.

Lake Sediment Samples:

PRMP lake sediment samples were analyzed by gamma ray spectroscopy and a natural abundance of Uranium, Thorium daughters and K-40 were detected. Traces of Cs-1 37 were also noted (less than 0.1 pCi/gram) and attributed to fallout.

E-2

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Fish Samples:

PRMP Fish samples collected and analyzed by gamma ray spectroscopy exhibited a natural abundance of K-40. Trace levels of Cs-137 present were attributed to fallout.

Drinking Water Samples:

Drinking water sampling and analysis was not performed as part of CNP's PRMP.

E-3

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 APPENDIX F NEI GROUNDWATER PROTECTION INITIATIVE F-1

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 Analysis of the Sample Data The Groundwater Protection Initiative (GPI) sample data for 2011 indicates no groundwater contamination in excess of the reporting threshold of 2.OOE-5 uCi/mL for tritium. Gamma spectroscopy was performed on all Radiological Environmental Monitoring Program wells quarterly. There were no positively identified radionuclides from plant effluents detected in any of the quarterly well samples other than the expected tritium values associated with documented plant events and recapture tritium from licensed radioactive gaseous release points.

The LLD value used for counting of the samples varied between 8.38E-7 and 9.72E-7uCi/mL, depending on which scintillation counter was used. This is well below the required minimum LLD value of 2.OOE-6 uCi/mL.

Values found above the LLD were not abnormal, unexpected, or inconsistent with past sampling history. The samples observed above LLD were expected results from the release of tritiated water into the Absorption Pond, a licensed pathway and part of plant design, or the result of recapture deposition of tritium from licensed radioactive gaseous release points.

Specifically, tritium results greater than LLD were the result of the 2009 release of radioactive effluent to the Absorption Pond as documented in AR 848816 or from the recapture of tritium from gaseous effluents. Wells MW-22, MW-24, MW-25, MW-26, MW-27, W-15, W-11, W-12, W-13 and W-14 are positioned to monitor Absorption Pond percolation. The groundwater transit of the tritium from the Absorption Pond mirrors the expected travel predicted by hydrogeologic studies. Wells W-2, W-4, W-5, and W-6 results continue to reflect the recapture of tritium from legally released gaseous effluents and are closely monitored for changes indicating some other condition. Wells located inside the Protected Area of the plant are subject to recapture deposition of tritium and show occasional sample results above LLD values following rainfalls and snow melt.

The sample data indicates that no radioactive spills or unidentified leaks have occurred in 2011 impacting groundwater. The sample results indicate proper well placement to ensure the protection of the groundwater and early identification of any abnormal conditions involving groundwater. This is validated by the demonstrated ability to monitor percolation from the Absorption Pond, with flow direction and behavior acting as described in the plant licensing documents.

. F-2

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD Date MW- MW- MW- MW- MW- MW- MW- MW-22D 22M 22S 24D 24M 24S 25D 25M 01/05/2011 <LLD <LLD 01/06/2011 <LLD <LLD <LLD <LLD <LLD <LLD 01/10/2011 <LLD <LLD <LLD 01/13/2011 <LLD 8.62E-7 1.20E-6 <LLD <LLD 01/17/2011 <LLD <LLD <LLD <LLD <LLD 01/24/2011 1.15E-6 <LLD 01/27/2011 <LLD <LLD 8.55E-7 02/03/2011 <LLD <LLD <LLD 02/07/2011 <LLD <LLD <LLD <LLD <LLD 02/10/2011 <LLD <LLD <LLD 02/14/2011 <LLD 02/17/2011 <LLD <LLD <LLD 02/21/2011 <LLD <LLD <LLD <LLD <LLD <LLD 02/24/2011 <LLD <LLD 03/04/2011 <LLD <LLD <LLD 03/08/2011 <LLD <LLD <LLD <LLD <LLD 1.21E-6

03/15/2011 <LLD <LLD <LLD 03/22/2011 <LLD <LLD 1.05E-6 <LLD <LLD 03/28/2011 <LLD <LLD 1.04E-6 04/04/2011 <LLD <LLD <LLD <LLD <LLD 1.03E-6 <LLD <LLD 04/11/2011 <LLD <LLD 1.06E-6 04/18/2011 <LLD <LLD <LLD 04/29/2011 <LLD <LLD <LLD 05/12/2011 <LLD <LLD <LLD <LLD <LLD 05/20/2011 <LLD, <LLD 05/23/2011 <LLD <LLD 06/09/2011 <LLD <LLD 06/16/2011 <LLD <LLD 06/20/2011 <LLD <LLD <LLD 06/24/2011 <LLD <LLD <LLD <LLD <LLD 06/27/2011 <LLD 06/28/2011 <LLD <LLD 07/08/2011 <LLD <LLD 07/15/2011 <LLD <LLD 07/22/2011 <LLD <LLD 07/25/2011 <LLD <LLD <LLD <LLD <LLD 07/29/2011 <LLD 1.25E-6 <LLD 08/01/20"11 <LLD 1.21E-6 <LLD <LLD <LLD (Note: Wells MW-22 through MW 27 are multi-port wells installed in the Fall of 2009, with three sample points placed at different depths. S= Shallow M= Middle D= Deep.)

(Note: A "'. symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

F-3

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD MW-22D through MW-25M continued Date MW- MW- MW- MW- MW- MW- MW- MW-22D 22M 22S 24D 24M 24S 25D 25M 08/09/2011 <LLD <LLD 08/17/2011 <LLD <LLD 08/25/2011 <LLD <LLD <LLD <LLD 1.23E-6 <LLD <LLD <LLD 08/30/2011 8.611E-7 <LLD 09/16/2011 <LLD <LLD 09/25/2011 9.72E-7 <LLD 09/29/2011 <LLD <LLD <LLD 1.16E-6 <LLD <LLD 10/01/2011 1.03E-6 <LLD 10/05/2011 1.11E-6 <LLD 10/09/2011 1.29E-6 <LLD 10/15/2011 <LLD <LLD <LLD <LLD <LLD <LLD 10/21/2011 1.27E-6 <LLD 10/23/2011 1.19E-6 <LLD 11/04/2011 <LLD <LLD <LLD <LLD <LLD <LLD 9.92E-7 <LLD 11/09/2011 1.28E-6 <LLD 11/11/2011 9.63E-7 <LLD 11/14/2011 <LLD <LLD 11/18/2011 <LLD <LLD <LLD <LLD <LLD <LLD 9.61E-7 <LLD 11/21/2011 9.04E-7 <LLD 11/23/2011 <LLD <LLD 12/02/2011 9.24E-7 <LLD 12/05/2011 <LLD <LLD 12/15/2011 1.14E-6 <LLD 12/20/2011 1.43E-6 <LLD 12/27/2011 <LLD <LLD <LLD <LLD <LLD <LLD 1.18E-6 <LLD (Note: Wells MW-22 through MW 27 are multi-port wells installed in the Fall of 2009, with three sample points placed at different depths. S= Shallow M= Middle D= Deep.)

(Note: A "*" symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

F-4

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD Date MW- MW- MW- MW- MW- MW- MW-25S 26D 26M 26S 27D 27M 27S 01/04/2011 1.03E-6 9.94E-7 1.59E-6 01/05/2011 <LLD <LLD <LLD 8.63E-7 01/06/2011 1.59E-6 8.55E-7 1.17E-6 01/10/2011 <LLD <LLD <LLD 9.98E-7 1.18E-6 1.23E-6 01/13/2011 <LLD 1.32E-6 1.04E-6 1.74E-6 01/17/2011 1.51E-6 1.75E-6 1.37E-6 1.46E-6 01/19/2011 1.23E-6 <LLD 8.57E-7 1.55E-6 1.09E-6 1.59E-6 02/07/2011 <LLD <LLD <LLD <LLD <LLD <LLD <LLD 02/24/2011 <LLD <LLD <LLD <LLD 1.28E-6 <LLD <LLD 03/22/2011 <LLD 1.11E-6 <LLD <LLD 1.49E-6 <LLD <LLD 04/04/2011 <LLD 1.57E-6 <LLD <LLD <LLD <LLD <LLD 05/12/2011 <LLD 1.99E-6 <LLD <LLD <LLD <LLD <LLD 05/16/2011 1.90E-6 05/20/2011 <LLD <LLD <LLD <LLD <LLD <LLD 05/23/2011 <LLD 1.44E-6 <LLD <LLD <LLD <LLD <LLD 06/09/2011 <LLD 1.15E-6 <LLD <LLD <LLD <LLD <LLD 06/16/2011 <LLD 1.46E-6 <LLD <LLD <LLD <LLD <LLD 06/24/2011 <LLD 1.38E-6 <LLD <LLD <LLD <LLD <LLD 06/28/2011 <LLD 1.62E-6 <LLD <LLD <LLD <LLD <LLD 07/08/2011 <LLD 1.58E-6 <LLD <LLD <LLD <LLD <LLD 07/15/2011 <LLD 1.57E-6 <LLD <LLD <LLD <LLD <LLD 07/22/2011 <LLD 1.52E-6 <LLD <LLD <LLD <LLD <LLD 07/25/2011 <LLD 1.40E-6 <LLD <LLD <LLD <LLD <LLD 08/01/2011 <LLD 1.12E-6 <LLD <LLD <LLD <LLD <LLD 08/09/2011 8.95E-7 1.23E-6 <LLD <LLD <LLD <LLD <LLD 08/17/2011 <LLD 8.73E-7 <LLD <LtD <LLD <LLD <LLD 08/25/2011 <LLD <LLD <LLD <LLD <LLD <LLD <LLD 08/30/2011 <LLD <LLD <LLD <LLD <LLD <LLD ,<LLD 09/16/2011 <LLD <LLD <LLD <LLD <LLD <LLD <LLD 09/25/2011 <LLD <LLD <LLD <LLD <LLD <LLD <LLD 10/01/2011 <LLD <LLD <LLD <LLD <LLD <LLD <LLD 10/05/2011 <LLD <LLD 9.64E-7 <LLD <LLD <LLD <LLD 10/09/2011 <LLD <LLD 1.20E-6 <LLD <LLD <LLD <LLD 10/21/2011 <LLD <LLD <LLD <LLD <LLD <LLD <LLD 10/23/2011 <LLD <LLD 1.32E-6 <LLD <LLD <LLD <LLD (Note: Wells MW-22 through MW 27 are multi-port wells installed in the Fall of 2009, with three sample points placed at different depths. S= Shallow M= Middle D= Deep.)

(Note: A "'"symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

F-5

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD MW-25S through MW-278 continued Date MW- MW- MW- MW- MW- MW- MW-25S 26D 26M 26S 27D 27M 27S 11/04/2011 <LLD 8.64E-7 2.41 E-6 <LLD <LLD <LLD <LLD 11/09/2011 <LLD <LLD 3.11E- <LLD 6*

11/11/2011 <LLD 3.61 E-6 <LLD <LLD <LLD 11/12/2011 <LLD <LLD 11/14/2011 <LLD <LLD 3.54E-6 <LLD <LLD <LLD <LLD 11/18/2011 <LLD <LLD 3.46E-6 <LLD 11/19/2011 <LLD <LLD <LLD 11/21/2011 <LLD <LLD 2.91E-6 <LLD <LLD <LLD <LLD 11/23/2011 <LLD <LLD 3.11E-6 <LLD <LLD <LLD <LLD 12/02/2011 <LLD <LLD 1.77E-6 <LLD <LLD <LLD <LLD 12/05/2011 <LLD <LLD 1.44E-6 <LLD 12/09/2011 <LLD <LLD <LLD 12/15/2011 <LLD <LLD 1.06E-6 <LLD <LLD <LLD <LLD 12/20/2011 <LLD <LLD 8.75E-7 <LLD <LLD <LLD <LLD 12/27/2011 <LLD <LLD 8.89E-7 <LLD <LLD <LLD <LLD (Note: Wells MW-22 through MW 27 are multi-port wells installed in the Fall of 2009, with three sample points placed at different depths. S= Shallow M= Middle D= Deep.)

(Note: A .*"symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD Date MW- MW- MW-23S 23D 23M 06/23/2011 <LLD <LLD <LLD (Note: Wells MW-22 through MW 27 are multi-port wells installed in the Fall of 2009, with three sample points placed at different depths. S= Shallow M= Middle D= Deep.)

(Note: A "* symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

F-6

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD Date W-9 W-10 W-1l W-12 W-13 W-14 W-15 OW-1 01/06/2011 <LLD 1.77E-6 <LLD 01/11/2011 <LLD 01/13/2011 2.02E-6 _

01/17/2011 1.56E-6 01/21/2011 9.62E-7 <LLD <LLD 01/24/2011 3.26E-6 1.76E-6 01/25/2011 <LLD <LLD <LLD 01/27/2011 1.20E-6 <LLD <LLD 1.18E-6 02/01/2011 <LLD <LLD <LLD <LLD 1.40E-6 02/07/2011 <LLD 02/08/2011 <LLD. <LLD <LLD <LLD <LLD 02/10/2011 <LLD. <LLD <LLD 02/14/2011 <LLD <LLD <LLD <LLD 02/17/2011 <LLD <LLD <LLD 02/21/2011 <LLD <LLD <LLD <LLD <LLD 03/04/2011 <LLD <LLD <LLD 03/05/2011 <LLD 03/08/2011 <LLD 03/09/2011 <LLD <LLD <LLD <LLD 03/15/2011 <LLD <LLD <LLD <LLD 03/22/2011 <LLD 03/28/2011 <LLD 04/04/2011 <LLD 04/07/2011 <LLD <LLD 04/08/2011 <LLD <LLD 04/11/2011 <LLD 04/18/2011 <LLD 04/29/2011 <LLD 05/04/2011 <LLD <LLD <LLD <LLD <LLD <LLD 05/05/2011 <LLD 05/12/2011 <LLD 06/20/2011 <LLD 06/27/2011 <LLD <LLD 06/29/2011 <LLD <LLD 07/25/2011 <LLD <LLD 07/26/2011 <LLD <LLD <LLD 08/01/2011 <LLD <LLD <LLD <LLD <LLD <LLD 08/15/2011 <LLD <LLD <LLD <LLD 09/29/2011 <LLD <LLD <LLD <LLD <LLD <LLD 10/15/2011 <LLD <LLD <LLD <LLD <LLD 11/01/2011 <LLD <LLD (Note: A "*"symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

F-7

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD W-9 throug h OW-1 continued Date W-9 W-10 W-11 W-12 W-13 W-14 W-15 OW-I 11/02/2011 <LLD <LLD <LLD <LLD <LLD 11/18/2011 <LLD <LLD <LLD <LLD 12/27/2011 <LLD <LLD 12/28/2011 <LLD 12/30/2011 <LLD Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD Date W-1 W-2 W-3 W-4 W-5 W-6 W-7 W-8 02/01/2011 1.10E-6 <LLD 02/04/2011 <LLD <LLD 02/08/2011 <LLD <LLD <LLD <LLD 05/03/2011 <LLD <LLD <LLD 05/04/2011 <LLD <LLD 05/06/2011 9.55E-7 <LLD 1.111E-6 08/01/2011 <LLD <LLD 08/02/2011 <LLD <LLD <LLD 08/03/2011 1.33E-6 1.17E-6 8.91 E-7 11/01/2011 <LLD <LLD <LLD 11/02/2011 <LLD <LLD 11/03/2011 9.42E-7 <LLD 11/05/2011 <LLD (Note: A "*"symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

F-8

Donald C. Cook Nuclear Plant Annual Radiological Environmental Operating Report 2011 2011 GPI Sample Data Samples analyzed for tritium. Values noted are in microcuries per milliliter (uCi/mL)

Lower Limit of Detection = LLD Date SG-1 SG-2 SG-4 SG-5 OW-4 MW-20 MW-21 95-11A 01/17/2011 <LLD 01/24/2011 <LLD <LLD 01/27/2011 <LLD 01/28/2011 <LLD 02/01/2011 <LLD <LLD <LLD <LLD <LLD <LLD 02/08/2011 <LLD <LLD 02/11/2011 <LLD <LLD 02/14/2011 <LLD <LLD 02/17/2011 <LLD <LLD 02/21/2011 <LLD <LLD 03/04/2011 <LLD <LLD <LLD 03/08/2011 <LLD <LLD 03/14/2011 <LLD 03/15/2011 <LLD <LLD 04/01/2011 <LLD 04/07/2011 <LLD <LLD 04/11/2011 <LLD 05/03/2011 <LLD <LLD <LLD <LLD 05/04/2011 <LLD <LLD 06/30/2011 <LLD <LLD 07/25/2011 <LLD <LLD 08/01/2011 <LLD <LLD 08/02/2011 <LLD <LLD <LLD <LLD 08/15/2011 <LLD <LLD 09/29/2011 <LLD <LLD 10/28/2011 <LLD <LLD <LLD <LLD <LLD 11/01/2011 <LLD 11/02/2011 <LLD 11/15/2011 <LLD 11/18/2011 <LLD <LLD <LLD <LLD <LLD <LLD 11/23/2011 <LLD 11/30/2011 <LLD 12/30/2011 <LLD <LLD <LLD <LLD <LLD <LLD (Note: A "*"symbol following a sample result denotes a gamma count was performed. Any gamma results above LLD will be additionally flagged and documented in the analysis section.)

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AEP-NRC-2012-22, Annual Radiological Environmental Operating Report for 2011

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AEP-NRC-2012-22, Annual Radiological Environmental Operating Report for 2011

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