Text

Annual Radiological Environmental Operating Report
	ML11137A048
Person / Time
Site:	Braidwood
Issue date:	05/13/2011
From:	Enright D; Exelon Corp, Exelon Generation Co, Exelon Nuclear
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	BW110049
	Download: ML11137A048 (258)
	v • d • e

Exelon Generation Company, LLC www.exeloncorp.com Exekrn. Nuclear Braidwood Station 35100 South Rt 53, Suite 84 Braceville, IL60407-9619 May 13,2011 BW1 10049 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Braidwood Station, Units 1 and 2 Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456 and STN 50-457

Subject:

2010 Annual Radiological Environmental Operating Report Attached is the 2010 Annual Radiological Environmental Operating Report for Braidwood Station. This report is being submitted in accordance with Technical Specification 5.6.2, "Annual Radiological Environmental Operating Report." This report contains information associated with the station's radiological environmental and meteorological monitoring programs. This information is consistent with the objectives described in the Offsite Dose Calculation Manual and 10 CFR 50, Appendix I, "Numerical Guides for Design Objectives and Limiting Conditions for Operation to Meet the Criterion 'As Low as is Reasonably Achievable' for Radioactive Material In Light-Water-Cooled Nuclear Power Reactor Effluents," Sections IV.B.2, and IV.B.3. Technical Specification 5.6.2 requires the Annual Radiological Environmental Operating Report to be submitted by May 15 of each year.

If you have any questions regarding this information, please contact Chris VanDenburgh, Regulatory Assurance Manager, at (815) 417-2800.

Respectfully, Daniel J. Ennigh Site Vice President Braidwood Station cc: (without attachments)

US NRC Regional Administrator, Region III US NRC Senior Resident Inspector - Braidwood Station NRR Project Manager - Braidwood Station Illinois Emergency Management Agency - Division of Nuclear Safety

Docket No: 50-456 50-457 BRAIDWOOD STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2010 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Braidwood Station Braceville, IL 60407 May 2011

Intentionally left blank Table Of Contents I. Sum m ary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 3 A. O bjectives of the REM P ................................................................................. 3 B. Implem entation of the O bjectives .................................................................... 3 I1l. Program Description ................................................................................................. 3 A. Sam ple Collection .......................................................................................... 3 B. Sam ple Analysis ............................................................................................. 5 C. Data Interpretation .......................................................................................... 6 D. Program Exceptions ..................................................................................... 7 E. Program Changes .......................................................................................... 9 IV. Results and Discussion ............................................................................................. 9 A. Aquatic Environm ent ...................................................................................... 9

1. Surface W ater ....................................................................................... 9

2. Public W ater ...................................................................................... 10

3. G round/well W ater ............................................................................. 10

4. Fish ................................................................................................... 11

5. Sedim ent ............................................................................................. 11 B. Atm ospheric Environm ent ............................................................................. 12

1. Airborne ............................................................................................. 12

a. Air Particulates ........................................................................ 12

b. Airborne Iodine ........................................................................ 13

2. Terrestrial ........................................................................................... 13

a. Milk ........................................................................................... 13

b. Food Products ........................................................................ 13 C . Am bient G am m a Radiation ........................................................................... 14 D. Land Use Survey ........................................................................................... 14 E. Summary of Results - Inter-laboratory Comparison Program ...................... 15

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Summary for the Braidwood Station, 2010 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2010 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2010 Figures Figure B-1 Inner Ring TLD Locations of the Braidwood Station, 2010 Figure B-2 Fixed Air Sampling and Outer Ring TLD Locations of the Braidwood Station, 2010 Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the Braidwood Station, 2010 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-1.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-1.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-1.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-I1.1 Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-11.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Braidwood Station, 2010.

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Table C-11.3 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-I11.1 Concentrations of Tritium in Ground/well Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-111.2 Concentrations of Gamma Emitters in Ground/well Water Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-IV.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-V.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-VI.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-VI.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-VI.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-VII.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-VIII.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-VIII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-IX.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Braidwood Station, 2010.

Table C-X.1 Quarterly TLD Results for Braidwood Station, 2010.

Table C-X.2 Mean Quarterly TLD Results for the Site Boundary, Middle and Control Locations for Braidwood Station, 2010.

Table C-X.3 Summary of the Ambient Dosimetry Program for Braidwood Station, 2010.

Figures Figure C-1 Surface Water - Gross Beta - Stations BD-1 0 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-2 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2010.

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Figure C-4 Surface Water - Tritium - Stations BD-10 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-5 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2010.

Figure C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-8 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-9 Ground/Well Water - Tritium - Stations BD-1 3 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-10 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-11 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-12 Ground/Well Water - Tritium - Stations BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2010.

Figure C-13 Ground/Well Water - Tritium - Stations BD-53 and BD-54 Collected in the Vicinity of Braidwood Station, 2010.

Figure C-14 Air Particulate - Gross Beta - Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-15 Air Particulate - Gross Beta - Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-16 Air Particulate - Gross Beta - Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2010.

Figure C-17 Air Particulate - Gross Beta - Station BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2010.

Figure C-18 Air Particulate - Gross Beta - Station BD-05 Collected in the Vicinity of Braidwood Station, 2010.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2010 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2010 iv

Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2010 Table D-4 ERA Statistical Summary Proficiency Testing Program for Environmental, Inc., 2010 Table D-5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2010 Appendix E Effluent Report Appendix F Meteorological Data Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR) v

1. Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the Braidwood Station by Exelon covers the period 1 January 2010 through 31 December 2010. During that time period, 1,552 analyses were performed on 1331 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of Braidwood Station had no adverse radiological impact on the environment.

Surface, public and ground/well water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Surface water and public water samples were also analyzed for concentrations of gross beta. No fission or activation products were detected. Gross beta and tritium activities detected were consistent with those detected in previous years.

Fish (commercially and/or recreationally important species) and sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected in fish. Two sediment samples had Cesium-1 37. The concentration was consistent with levels observed during the preoperational years. No plant produced fission or activation products were found in sediment.

Air particulate samples were analyzed for concentrations of gross beta and gamma emitting nuclides. No fission or activation products were detected.

High sensitivity 1-131 analyses were performed on weekly air samples. All results were less than the minimum detectable activity.

Cow milk samples were analyzed for concentrations of 1-131 and gamma emitting nuclides. All 1-131 results were below the minimum detectable activity.

Concentrations of naturally occurring K-40 were detected. No fission or activation products were found.

Food Product samples were analyzed for concentrations of gamma emitting nuclides. No plant produced fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using thermoluminescent dosimeters(TLD). Levels detected were consistent with those observed in previous years with the exception of the first quarter TLD values, which were higher due to being exposed in transit.

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a Introduction The Braidwood Station, consisting of two 3587 MWt pressurized water reactors owned and operated by Exelon Corporation, is located in Will County, Illinois.

Unit No. 1 went critical on 29 May 1987. Unit No. 2 went critical on 08 March 1988. The site is located in northeastern Illinois, 15 miles south-southwest of Joliet, Illinois, 60 miles southwest of Chicago, and southwest of the Kankakee River.

This report covers those analyses performed by Teledyne Brown Engineering (TBE), Global Dosimetry, and Environmental Inc. (Midwest Labs) on samples collected during the period 1 January 2010 through 31 December 2010.

A. Objective of the REMP The objectives of the REMP are to:

1. Provide data on measurable levels of radiation and radioactive materials in the site environs.

2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure.

B. Implementation of the Objectives The implementation of the objectives is accomplished by:

1. Identifying significant exposure pathways.

2. Establishing baseline radiological data of media within those pathways.

3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment.

Ill. Program Description A. Sample Collection Samples for the Braidwood Station REMP were collected for Exelon Nuclear by Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the Braidwood Station REMP in 2010.

Sample locations and descriptions can be found in Table B-1 and Figures B-1 through B-3, Appendix B. The sampling methods used by Environmental Inc. are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, public water, well water, fish, and sediment. Two gallon water samples were collected weekly from six surface water locations (BD-10, BD-25 [control], BD-38, BD-40, BD-55 and BD-56) and one weekly composite sample of public drinking water location (BD-22) and ground/well water samples collected quarterly from nine locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51, BD-53 and BD-54). All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection. Fish samples comprising the flesh of largemouth bass, smallmouth bass, golden redhorse, quillback, freshwater drum, channel catfish and carp were collected semiannually at three locations, BD-25 (control), BD-28, and BD-41. Sediment samples composed of recently deposited substrate were collected at two locations semiannually, BD-1 0 and BD-57.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, and milk. Air particulate samples were collected and analyzed weekly at eight locations (BD-02, BD-03, BD-04, BD-05, BD-06, BD-19, BD-20, and BD-21). The control location was BD-03. Airborne iodine and particulate samples were obtained at each location, using a vacuum pump with charcoal and glass fiber filters attached. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The air filters and air iodine samples were replaced weekly and sent to the laboratory for analysis.

Milk samples were collected biweekly at two locations (BD-17 and BD-18) from May through October, and monthly from November through April.

The control location was BD-1 8. All samples were collected in new unused two gallon plastic bottles from the bulk tank at each location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected annually in September at five locations (BD-Control, BD-Quad 1, BD-Quad 2, BD-Quad 3, and BD-Quad 4). The control location was BD-Control. Various types of samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

Ambient Gamma Radiation Direct radiation measurements were made using dual calcium fluoride and lithium flouride thermoluminescent dosimeters (TLD). Each location consisted of 2 TLD sets. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis. The TLDs were placed at locations on and around the Braidwood Station site as follows:

An inner ring (site boundary) consisting of 16 locations (BD-101, BD-102, BD-103, BD-104, BD-105, BD-106, BD-107, BD-108, BD-109, BD-110, BD-11 la, BD-112, BD-113a, BD-114, BD-115 and BD-116) at or near the site boundary.

An outer ring (intermediate distance) consisting of 16 locations (BD-201, BD-202, BD-203, BD-204, BD-205, BD-206, BD-207, BD-208, BD-209, BD-210, BD-211, BD-212, BD-213, BD-214, BD-215, BD-216) extending to approximately 5 miles from the site.

An additional (other) set consisting of seven locations (BD-02, BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21).

The balance of one location (BD-03) represents the control area.

The specific TLD locations were determined by the following criteria:

1. The presence of relatively dense population;

2. Site meteorological data taking into account distance and elevation for each of the sixteen-22 1/2 degree sectors around the site, where estimated annual dose from Braidwood Station, if any, would be most significant; B. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. (Midwest Labs) to analyze the environmental samples for radioactivity for the Braidwood Station REMP in 2010. The analytical procedures used by the laboratories are listed in Table B-2.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of beta emitters in public and surface water and air particulates.

2. Concentrations of gamma emitters in public, ground/well and surface water, air particulates, milk, fish, sediment and food products.

3. Concentrations of tritium in public, ground/well and surface water.

4. Concentrations of 1-131 in air and milk.

5. Ambient gamma radiation levels at various site environs.

C. Data Interpretation The radiological and direct radiation data collected prior to Braidwood Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Braidwood Station was considered operational at initial criticality. In addition, data was compared to previous years' operational data for consistency and trending. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) was defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5% probability of falsely concluding that a blank observation represents a "real" signal. The LLD was intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criteria for the presence of activity. All analyses were designed to achieve the required Braidwood Station detection capabilities for environmental sample analysis.

The minimum detectable concentration (MDC) is defined above with the exception that the measurement is an after the fact estimate of the presence of activity.

2. Net Activity Calculation and Reporting of Results Net activity for a sample was calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations may result in sample activity being lower than the background activity effecting a negative number. An MDC was reported in all cases where positive activity was not detected.

Gamma spectroscopy results for each type of sample were grouped as follows:

For surface, public, ground/well water and fish 12 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-1 34, Cs-137, Ba-140, and La-140 were reported.

For sediment, air particulate, milk and vegetation 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137, Ba-140, and La-140 were reported.

Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than single analysis uncertainty.

D. Program Exceptions For 2010 the Braidwood Station REMP had a sample recovery rate in excess of 99%. Sample anomalies and missed samples are listed in the tables below:

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date A/I BD-03 03/11/10 No apparent reason for low timer reading of 145.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ; possible power outage.

A/I BD-03 04/29/10 Low reading of 167.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months possibly due to storms in the area.

A/I BD-05 04/29/10 Low reading of 164.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months possibly due to storms in the area.

A/I BD-03 05/13/10 Low reading of 159.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months possibly due to power outages in the area.

A/I BD-06 06/03/10 Estimated reading of 170.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months ; timer reset; collector will check timer next collection period.

A/I BD-04 06/10/10 Pump plugs melted by power surge; collector placed new pump.

Estimated flow rate of 60 cfh used.

Table D-1 LISTING OF SAMPLE ANOMALIES (continued)

Sample Location Collection Reason Type Code Date A/I BD-02 08/19/10 No apparent reason for low reading of 165.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

A/I BD-03 12/02/10 No apparent reason for low reading of 188.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date WT BD-55, BD-56 01/07/10 No sample, water frozen.

WG BD-50 01/14/10 No sample for quarter. Homeowner not cooperating, then requested to be included in the program in subsequent quarters.

WT BD-38, BD-55 01/14/10 No sample, water frozen.

BD-56 WT BD-38, BD-55 01/21/10 No sample, water frozen.

BD-56, WT BD-55, BD-56 01/28/10 No sample, water frozen.

WT BD-55, BD-56 02/04/10 No sample, water frozen.

WT BD-55, BD-56 02/11/10 No sample, water frozen.

WT BD-55, BD-56 02/18/10 No sample, water frozen.

WT BD-55, BD-56 02/25/10 No sample, water frozen.

WT BD-55, BD-56 03/04/10 No sample, water frozen.

WT BD-55, BD-56 12/09/10 No sample, water frozen.

WT BD-38, BD-55 12/16/10 No sample, water frozen.

BD-56 WT BD-38, BD-55 12/23/10 No sample, water frozen.

BD-56 Table D-2 LISTING OF MISSED SAMPLES (continued)

Sample Location Collection Reason Type Code Date WT BD-38, BD-55 12/30/10 No sample, water frozen.

BD-56 Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance errors were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns and power outages were unavoidable.

The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.

E. Program Changes A homeowner, representing location BD-50, who had not been previously participating has been included in the program again in 2010. No ODCM change had occurred due to the homeowner's decisions.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at six locations (BD-10, BD-25, BD-38, BD-40, BD-55 and BD-56). Of these locations, only BD-10, BD-38, and BD-40 could be affected by Braidwood Station's effluent releases. The following analyses were performed.

Gross Beta Samples from all locations were analyzed for concentrations of gross beta (Table C-I.1, Appendix C). Gross beta was detected in 57 of 68 samples. The values ranged from 2.8 to 14.2 pCi/I.

Concentrations detected were consistent with those detected in previous years (Figures C-1 through C-3, Appendix C).

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). Tritium activity was detected in one of 24 samples at a concentration of 307 pCi/I (Figures C-4 through C-6, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-1.3, Appendix C). No nuclides were detected, and all required LLDs were met.

2. Public Water Monthly composite of weekly samples were collected at one location (BD-22). This location could be affected by Braidwood Station's effluent releases. The following analyses were performed:

Gross Beta Samples from the location were analyzed for concentrations of gross beta (Tables C-11.1, Appendix C). Gross beta was detected in nine of 12 samples. The values ranged from 2.4 to 6.4 pCi/l.

Concentrations detected were consistent with those detected in previous years (Figure C-7, Appendix C).

Tritium Monthly composites of weekly samples from the location were analyzed for tritium activity (Table C-11.2, Appendix C). Tritium was detected in four of 12 samples. The values ranged from 213 to 2950 pCi/I. Concentrations detected were consistent with those detected in previous years (Figure C-8, Appendix C).

Gamma Spectrometrv Samples from the location were analyzed for gamma emitting nuclides (Table C-11.3, Appendix C). No nuclides were detected, and all required LLDs were met.

3. Ground/Well Water Quarterly samples were collected at nine locations (BD-1 3, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51, BD-53 and BD-54). The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-111.1, Appendix C). Tritium was detected in two of 35 samples. The values ranged from 180 to 242 pCi/I. The concentration detected was consistent with those detected in previous years (Figures C-9 through C-13, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-111.2, Appendix C). No nuclides were detected, and all required LLDs were met.

4. Fish Fish samples comprised of largemouth bass, smallmouth bass, golden redhorse, quillback, freshwater drum, channel catfish and common carp were collected at three locations (BD-25, BD-28, and BD-41) semiannually. Locations BD-28 and BD-41 could be affected by Braidwood Station's effluent releases. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from all three locations was analyzed for gamma emitting nuclides (Table C-IV. 1, Appendix C).

No fission or activation products were found. No nuclides were detected, and all required LLDs were met.

5. Sediment Aquatic sediment samples were collected at two locations (BD-10 and BD-57) semiannually. The locations, at the Braidwood Station outfall to the Kanakakee River and downstream of the outfall, could be affected by the Braidwood Station's effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from the location were analyzed for gamma emitting nuclides (Table C-V.1, Appendix C).

Concentrations of the fission product Cs-1 37 were found at location BD-10 in both samples. The concentration ranged from 108 to 165 pCi/kg dry. The activity detected was consistent with those detected in previous years (29 pCi/kg to 260 pCi/kg from 1995 to 2006). No other Braidwood fission or activation products were found and all required LLDs were met.

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from eight locations on a weekly basis. The eight locations were separated into three groups: Near field samplers (BD-06, BD-19, BD-20 and BD-21), far field samplers within 10 km of the site (BD-02, BD-04 and BD-05) and the Control sampler between 10 and 30 km from the site (BD-03). Far field samples are analyzed when the respective near field sample results are inconsistent with previous measurements and radioactivity is confirmed as having its origin in airborne effluents from the station, or at the discretion of the REMP Program Owner. The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-VI.1 and C-VI.2, Appendix C).

Detectable gross beta activity was observed at all locations.

Comparison of results among the three groups aid in determining the effects, if any, resulting from the operation of Braidwood Station. The results from the near field (Group I) ranged from 6 to 41 E-3 pCi/m 3 with a mean of 19 E-3 pCi/m . The results from the far field (Group II) ranged from 6 to 43 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3 . The results from the Control location (Group Ill) ranged from 7 to 42 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m 3 . Comparison of the 2010 air particulate data with previous years data indicate no effects from the operation of Braidwood Station.

In addition a comparison of the weekly mean values for 2010 indicate no notable differences among the three groups (Figures C-14 through C-18, Appendix C).

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-VI.3, Appendix C).

No nuclides were detected, and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from eight locations (BD-02, BD-03, BD-04, BD-05, BD-06, BD19, BD-20, and BD-21) and analyzed weekly for 1-131 (Table C-VII.1, Appendix C). 1-131 was not detected, and the required LLD was met.

2. Terrestrial

a. Milk Samples were collected from two locations (BD-1 7 and BD-18) biweekly May through October and monthly November through April. The following analyses were performed:

Iodine-131 Milk samples from both locations were analyzed for concentrations of 1-131 (Table C-VIII.1, Appendix C). No 1-131 was detected, and all required LLDs were met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides (Table C-VIII.2, Appendix C). No nuclides were detected, and all required LLDs were met.

b. Food Products Food product samples were collected at five locations (BD-Control, BD-Quad 1, BD-Quad 2, BD-Quad 3 and BD-Quad

4) when available. Four locations, (located downstream, BD-Quad 1, BD-Quad 2, BD-Quad 3 and BD-Quad 4) could be affected by Braidwood Station's effluent releases. The following analysis was performed:

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-IX.1, Appendix C). No nuclides were detected, and all required LLDs were met.

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing dual element calcium fluoride and lithium fluoride thermoluminescent dosimeters (TLD).

Eighty TLD locations were established around the site. Results of TLD measurements are listed in Tables C-X.1 to C-X.3, Appendix C.

All TLD measurements were below 30 mR/quarter, with a range of 14 to 27 mR/quarter with the exception of the first quarter TLDs. The first quarter TLDs were exposed in transit resulting in a higher value. A comparison of the Inner Ring, Outer Ring and Other data to the Control Location data, indicate that the ambient gamma radiation levels from all locations were similar.

D. Land Use Survey A Land Use Survey conducted during August 2010 around the Braidwood Station was performed by Environmental Inc. (Midwest Labs) for Exelon Nuclear to comply with section 12.5.2 of the Braidwood Station's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 500 ft2 in each of the sixteen 22 1/ degree sectors around the site. For dose calculation, a garden is assumed at the nearest residence. There were no changes required to the Braidwood Station REMP, as a result of this survey. The results of this survey are summarized below.

Distance in Miles from the Braidwood Station Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles (A) N 0.5 2.6 (B) NNE 1.8 (C) NE 0.7 0.9 (D) ENE 0.8 3.3 (E) E 0.8 2.3 (F) ESE 2.2 2.3 (G) SE 2.7 2.7 11.2 (H) SSE 4.5 (J) S 4.2 4.8 (K)SSW 1.3 5.3 5.6 (L)SW 0.4 1.2 (M)WSW 0.5 (N) W 0.4 1.6 8.7 (P) WNW 0.4 (Q) NW 0.4 (R) NNW 0.4 E. Summary of Results - Inter-Laboratory Comparison Program The primary and secondary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices (Appendix D). The PE samples, supplied by Analytics Inc., Environmental Resource Associates (ERA) and DOE's Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

1. Analytics Evaluation Criteria Analytics' evaluation report provides a ratio of laboratory results and Analytics' known value. Since flag values are not assigned by Analytics, TBE-ES evaluates the reported ratios based on internal QC requirements, which are based on the DOE MAPEP criteria.

2. ERA Evaluation Criteria ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, NELAC, state specific PT program requirements or ERA's SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEP's evaluation report provides an acceptance range with associated flag values.

The MAPEP defines three levels of performance: Acceptable (flag = "A"), Acceptable with Warning (flag = "W"), and Not Acceptable (flag = "N"). Performance is considered acceptable when a mean result for the specified analyte is +/- 20% of the reference value. Performance is acceptable with warning when a mean result falls in the range from +/-20% to +/-30% of the reference value (i.e., 20% < bias < 30%). If the bias is greater than 30%, the results are deemed not acceptable.

For the primary laboratory, 16 out of 18 analytes met the specified acceptance criteria. Two analytes did not meet the specified acceptance criteria for the following reason:

1. Teledyne Brown Engineering's ERA November 2010 Sr-89 in water result of 77.8 pCi/L was higher than the known value of 68.5 pCi/L, resulting in a found to known ratio of 1.14. NCR 10-09 was initiated to investigate this failure. Since the ratio of 1.14 fell within an acceptance range of 20%, Teledyne considers this an acceptable result.

2. Teledyne Brown Engineering's ERA November 2010 Zn-65 in water result of 11.0 pCi/L was lower than the known value of 102 pCi/L. NCR 10-09 was initiated to investigate this failure. The Zn-65 result of 111 was incorrectly reported as 11.0.

The Inter-Laboratory Comparison Program provides evidence of "in control" counting systems and methods, and that the laboratories are producing accurate and reliable data.

Intentionally left blank APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT QUARTERLY AND ANNUAL

SUMMARY

Intentionally left blank TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 68 4 6.5 8.3 10.5 BD-40 INDICATOR 0 (PCI/LITER) (45/56) (12/12) (12/12) BRAIDWOOD STATION COOLING LAKE (2.8/14.2) (5.7/11) (5.9/14.2) ONSITE H-3 24 200 307 <LLD 307 BD-I 0 INDICATOR 0 (1/20) (1/4) KANKAKEE RIVER DOWNSTREAM 5.4 MILES NE OF SITE GAMMA 68 MN-54 15 <LLD <LLD CO-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 CO-60 15 <LLD <LLD 0 ZN-65 30 <LLD <LLD 0 NB-95 15 <LLD <LLD 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER ZR-95 30 <LLD <LLD 0 (PCI/LITER) 1-131 15 <LLD <LLD 0 CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 BA-140 60 <LLD <LLD 0 LA- 140 15 <LLD <LLD 0 PUBLIC WATER GR-B 12 3.8 NA 3.8 BD-22 INDICATOR 0 (PCI/LITER) (9/12) (9/12) WILMINGTON (2.4/6.4) (2.4/6.4) 6.0 MILES NE OF SITE H-3 12 200 1029 NA 1029 BD-22 INDICATOR 0 (4/12) (4/12) WILMINGTON (213/2950) (213/2950) 6.0 MILES NE OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS PUBLIC WATER GAMMA 12 (PCI/LITER) MN-54 15 <LLD NA CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0 CO-60 15 <LLD NA 0 ZN-65 30 <LLD NA 0 NB-95 15 <LLD NA 0 ZR-95 30 <LLD NA 0 1-131 15 <LLD NA 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS PUBLIC WATER CS-134 15 <LLD NA 0 (PCI/LITER)

CS-137 18 <LLD NA 0 BA-140 60 <LLD NA 0 LA-140 15 <LLD NA 0 GROUND WATER H-3 35 200 211 NA 211 BD-36 INDICATOR 0 (PC/LITER) (2/35) (2/4) HUTITON WELL (180/242) (180/242) 4.7 MILES E OF SITE GAMMA 35 MN-54 15 <LLD NA 0 CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-60 15 <LLD NA (PCI/LITER)

ZN-65 30 <LLD NA 0 NB-95 15 <LLD NA 0 ZR-95 30 <LLD NA 0 1-131 15 <LLD NA 0 CS-134 15 <LLD NA 0 CS-137 18 <LLD NA 0 BA-140 60 <LLD NA 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER LA-140 15 <LLD NA 0 (PCI/LITER)

FISH GAMMA 12 (PCI/KG WET) MN-54 130 <LLD <LLD 0 CO-58 130 <LLD <LLD 0 FE-59 260 <LLD <LLD 0 CO-60 130 <LLD <LLD 0 ZN-65 260 <LLD <LLD 0 NB-95 NA <LLD <LLD 0 ZR-95 NA <LLD <LLD 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PAREN T HESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH 1-131 NA <LLD <LLD 0 (PCI/KG WET)

CS-134 130 <LLD <LLD 0 CS-137 150 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 SEDIMENT GAMMA 4 (PCI/KG DRY) MN-54 NA <LLD NA 0 CO-58 NA <LLD NA 0 FE-59 NA <LLD NA 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT CO-60 NA <LLD NA 0 (PCI/KG DRY)

ZN-65 NA <LLD NA 0 NB-95 NA <LLD NA 0 00 ZR-95 NA <LLD NA 0 CS-134 150 <LLD NA 0 CS-137 180 137 NA 137 BD-10 INDICATOR 0 (2/4) (2/2) KANKAKEE RIVER DOWNSTREAM (108/165) (108/165) 5.4 MILES NE OF SITE BA- 140 NA <LLD NA 0 LA-140 NA <LLD NA 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE GR-B 416 10 20 21 21 BD-03 CONTROL 0 (E-3 PCI/CU.METER) (362/364) (51/52) (51/52) COUNTY LINE ROAD (6/43) (7/42) (7/42) 6.2 MILES ESE OF SITE GAMMA 32 MN-54 NA <LLD <LLD 0 CO-58 NA <LLD <LLD 0 FE-59 NA <LLD <LLD 0 CO-60 NA <LLD <LLD 0 ZN-65 NA <LLD <LLD 0 NB-95 NA <LLD <LLD 0 ZR-95 NA <LLD <LLD 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE CS-134 50 <LLD <LLD 0 (E-3 PCI/CU.METER)

CS-137 60 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 0....

LA-140 NA <LLD <LLD 0 AIR IODINE GAMMA 416 (E-3 PCI/CU.METER) 1-131 70 <LLD <LLD 0 MILK 1-131 38 <LLD <LLD 0 (PCI/LITER)

GAMMA 38 MN-54 NA <LLD <LLD 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK CO-58 NA <LLD <LLD 0 (PCI/LITER)

FE-59 NA <LLD <LLD 0 CO-60 NA <LLD <LLD 0 ZN-65 NA <LLD <LLD 0 NB-95 NA <LLD <LLD 0 ZR-95 NA <LLD <LLD 0 CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK BA-140 60 <LLD <LLD 0 (PCI/LITER)

LA- 140 15 <LLD <LLD 0 VEGETATION GAMMA 10 (PCI/KG WET) MN-54 NA <LLD <LLD 0 CO-58 NA <LLD <LLD 0 FE-59 NA <LLD <LLD 0 CO-60 NA <LLD <LLD 0 ZN-65 NA <LLD <LLD 0 NB-95 NA <LLD <LLD 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2010 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2010 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF:

PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS VEGETATION ZR-95 NA <LLD <LLD 0 (PCI/KG WET)

CS-134 60 <LLD <LLD CS-137 80 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 DIRECT RADIATION TLD-QUARTERLY 320 NA 56.1 47.4 81.8 BD-I I IA-2 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (312/312) (8/8) (4/4)

(14/271) (16/166) (17/271) 1.4 MILES SW

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

Intentionally left blank APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS

Intentionally left blank TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2010 Location Location Description Distance & Direction From Site A. Surface Water BD-10 Kankakee River Downstream (indicator) 5.4 miles NE BD-25 Kankakee River Upstream (control) 9.6 miles E BD-38 Main Drainage Ditch (indicator) 1.5 miles SW BD-40 Braidwood Station Cooling Lake (indicator) Onsite BD-55 North Pond Fatlan Site (Indicator) 0.6 miles NE BD-56 South Pond Fatlan Site (indictor) 0.6 miles NE B. Drinking (Potable) Water BD-22 Wilmington (indicator) 6.0 miles NE C. Ground/Well Water BD-13 Braidwood City Hall Well (indicator) 1.7 miles NNE BD-34 Gibson Well (indicator) 4.7 miles E BD-35 Joly Well (indicator) 4.7 miles E BD-36 Hutton Well (indicator) 4.7 miles E BD-37 Nurczyk Well (indicator) 4.7 miles E BD-50 Skole Well (indicator) 4.7 miles E BD-51 Fatlan Well (indicator) 0.6 miles NE BD-53 Phelps Well (indicator) 0.7 miles E BD-54 Cash Well (indicator) 0.9 miles NE D. Milk - bi-weeklv / monthly BD-17 Halpin's Dairy (indicator) 5.5 miles SSW BD-18 Biros' Farm (control) 8.7 miles W E. Air Particulates / Air Iodine BD-02 Custer Park (indicator) 5.0 miles E BD-03 County Line Road (control) 6.2 miles ESE BD-04 Essex (indicator) 4.8 miles SSE BD-05 Gardner (indicator) 5.5 miles SW BD-06 Godley (indicator) 0.5 miles WSW BD-19 Nearsite NW (indicator) 0.3 miles NW BD-20 Nearsite N (indicator) 0.6 miles N BD-21 Nearsite NE (indicator) 0.5 miles NE F. Fish BD-25 Kankakee River, Upstream (control) 5.0 miles E BD-28 Kankakee River, Discharge (indicator) 5.4 miles E BD-41 Cooling Lake (indicator) 1.0 mile E G. Sediment BD-10 Kankakee River, Downstream (indicator) 5.4 miles NE BD-57 Circulating Water Blowdown Discharge (indicator) 5.4 miles E B-1

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2010 Location Location Description Distance & Direction From Site H. Food Products Quadrant 1 Clark Farm 3.8 miles ENE Quadrant 2 W.F. Soltwisch 4.5 miles SSE Quadrant 3 Terri Schultz 4.8 miles SSW Quadrant 4 Bruce Sinkular 1.9 miles NNW Control Gorman Farm 9.0 miles NE

1. Environmental Dosimetry - TLD Site Boundary BD-101-3 and -4 0.5 miles N BD-102-1 and -2 1.1 miles NNE BD-103-1 and -2 1.0 mile NE BD-104-1 and -2 0.7 miles ENE BD-105-1 and -2 2.2 miles E BD-106-1 and -2 2.5 miles ESE BD-107-1 and -2 3.2 miles SE BD-108-1 and -2 3.2 miles SSE BD-109-1 and -2 3.8 miles S BD-110-1 and -2 2.8 miles SSW BD-11 a-1 and -2 1.4 miles SW BD-112-1 and -2 0.7 miles WSW BD-1 13a-1 and -2 0.5 miles W BD-114-1 and -2 0.4 miles WNW BD-1 15-1 and -2 0.3 miles NW BD-1 16-1 0.4 miles NNW BD-1 16-2 0.5 miles NNW Intermediate Distance BD-201-1 and -2 4.2 miles N BD-202-1 and -2 4.8 miles NNE BD-203-1 and -2 4.9 miles NE BD-204-1 and -2 4.3 miles ENE BD-205-1 and -2 4.0 miles E BD-206-1 and -2 4.5 miles ESE BD-207-1 and -2 4.5 miles SE BD-208-1 and -2 4.5 miles SSE BD-209-1 and -2 4.8 miles S BD-210-1 and -2 5.3 miles SSW BD-211-1 and -2 4.8 miles SW BD-212-3 and -4 5.0 miles WSW BD-213-3 and -4 4.8 miles W BD-214-1 and -2 4.3 miles WNW BD-215-1 and -2 4.5 miles NW BD-216-1 and -2 4.0 miles NNW Other BD-02-1 and -2 Custer Park (indicator) 5.0 miles E BD-04-1 and -2 Essex (indicator) 4.8 miles SSE BD-05-1 and -2 Gardner (indicator) 5.5 miles SW BD-06-1 and -2 Godley (indicator) 0.5 miles WSW BD-19-1 and -2 Nearsite NW (indicator) 0.3 miles NW BD-20-1 and -2 Nearsite N (indicator) 0.6 miles N BD-21-1 and -2 Nearsite NE (indicator) 0.5 miles NE B-2

TABLE B-1: RadiologicalEnvironmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2010 Location Location Description Distance & Direction From Site I. Environmental Dosimetry - TLD (cont'd)

Control and Special Interest BD-03-1 and -2 Onsite 2 0.3 miles NE B-3

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2010 Sample Medium Analysis Sampling Method Analytical Procedure Number Surface Water Gamma Spectroscopy Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis from weekly grab samples.

Surface Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in from weekly grab various matrices samples.

Surface Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from weekly grab scintillation samples.

Drinking Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in from weekly grab various matrices samples.

Drinking Water Gamma Spectroscopy Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis from weekly grab samples.

Drinking Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from weekly grab scintillation samples.

Ground/Well Water Gamma Spectroscopy Quarterly grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples.

Ground/Well Water Tritium Quarterly grab TBE, TBE-2011 Tritium analysis in drinking water by liquid samples. scintillation Fish Gamma Spectroscopy Samples collected TBE-2007 Gamma emitting radioisotope analysis twice annually via electroshocking or other techniques B-4

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2010 Sample Analysis Sampling Method Analytical Procedure Number Medium Air Particulates Gross Beta One-week composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in of continuous air various matrices sampling through glass fiber filter paper Air Particulates Gamma Spectroscopy Quarterly composite TBE, TBE-2007 Gamma emitting radioisotope analysis of each station Air Iodine Gamma Spectroscopy Weekly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis continuous air sampling through charcoal filter Milk 1-131 Bi-weekly grab TBE, TBE-2012 Radioiodine in various matrices sample May through October. Monthly all other times Milk Gamma Spectroscopy Bi-weekly grab TBE, TBE-2007 Gamma emitting radioisotope analysis sample May through October. Monthly all other times Food Products Gamma Spectroscopy Annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples.

TLD Thermoluminescence Quarterly TLDs Mirion Technologies Dosimetry comprised of two Global Dosimetry CaF 2 elements.

B-5

on a TLD Locatian Figure B-i Inner Ring TLD Locations of the Braidwood Station, 2010 B-6

4K a -

i

~I I 2 2I 4 I

sa IMHUs w TIXL-ucationi

Air Swviq 14cat~a Figure B-2 Fixed Air Sampling and Outer Ring TLD Locations of the Braidwood Station, 2010 B-7

QFFSI1T DOSE, CAL(,I¶LA.IION MANUAL BFRAIDWOOD STrA7HQM a 1 7 3 4 5 FIGURE 11-3 ki.. md a 19 1 miles flMMMNO~ AW) WATERM?4E!MMIURE PATHWAYSAMPLEfLOCATtON3

Water asedimew 111A~ X Mik Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the Braidwood Station, 2010 B-8

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY

Intentionally left blank TABLE C-1.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD U

01/07/10 - 01/28/10 4.2 +/- 2.1 8.5 +/- 2.7 4.9 +/- 2.7 (1) 11 + 2.9 (1) (1) 02/04/10 - 02/25/10 6.3 +/- 3.1 6.6 +/- 3.5 4.2 +/- 1.8 11 +/- 3.7 (1) (1) 03/04/10 - 03/25/10 <3.4 9.6 +/- 3.2 4.6 +/- 2.9 11 +/- 3.2 2.9 +/- 1.9 (1) <3.1 (1) 04/01/10 - 04/29/10 4.8 +/- 2.1 8.4 +/- 2.6 5.1 +/- 2.4 5.9 +/- 2.1 3.1 +/- 1.8 5.4 +/- 2.4 05/06/10 - 05/27/10 4.7 +/- 2.2 7.7 +/- 2.4 4.3 +/- 2.6 11 +/- 2.8 3.5 +/- 1.9 <3.2 06/03/10 - 06/24/10 7.2 +/- 2.3 6.7 +/- 2.4 < 3.8 10 +/- 2.9 < 2.8 < 3.3 07/01/10 - 07/29/10 5.3 +/- 2.2 8.0 +/- 2.5 < 3.7 7.1 +/- 2.4 < 2.6 <3.0 08/05/10 - 08/26/10 4.1 +/- 2.2 5.7 +/- 2.2 4.1 +/- 2.8 12 +/- 2.9 < 2.9 <3.1 09/02/10 - 09/30/10 5.6 +/- 2.8 9.9 +/- 2.7 9.6 +/- 3.7 14 + 3.8 2.8 +/- 1.8 3.8 +/- 2.0 10/07/10 - 10/28/10 4.4 +/- 2.7 8.3 +/- 3.2 5.4 +/- 3.3 12 +/- 3.5 5.8 +/- 3.3 6.2 +/- 3.0 11/04/10 - 11/24/10 4.8 +/- 1.9 11 +/- 2.3 9.4 +/- 2.5 13 +/- 2.7 4.0 +/- 1.7 5.2 +/- 1.9 12/02/10 - 12/02/10 5.5 +/- 2.1 9.4 +/- 2.4 6.1 +/- 2.2 (1) 9.2 +/- 2.7 4.3 +/- 1.7 (1) 5.7 +/- 2.0 (1)

MEAN 5.2 +/- 1.9 8.3 +/- 3.0 5.8 +/- 4.1 10 +/- 4.6 3.8 +/- 2.1 5.3 +/- 1.8 TABLE C-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD 7U 01/07/10 - 03/25/10 178 177 < 174 177 < 172 < 179 04/01/10 - 06/24/10 160 167 < 166 164 < 165 < 165 07/01/10 - 09130/10 188 195 < 188 188 < 191 < 192 10/07/10 - 12/30/10 307 +/-112 < 160 < 158 161 < 159 < 160 MEAN (1) SEE EXCEPTIONS SECTION FOR EXPLANATION

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-1

TABLE C-l.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-10 01/07/10 - 01/28/10 3 <3 <7 <3 <4 <4 <5 < 12 <2 <3 < 27 <8 02/04/10 - 02/25/10 3 <3 <7 <3 <6 <4 <6 <10 <3 <3 < 20 <8 03/04/10 - 03/25/10 1 <1 <4 <1 <2 <2 <3 <6 <1 <1 < 43 < 13 04/01/10 - 04/29/10 2 <2 <4 <2 <3 <2 <3 < 11 <1 <2 < 18 <6 05/06/10 - 05/27/10 2 <2 <4 <2 <3 <2 <3 < 15 <2 <2 < 22 <6 06/03/10 - 06/24/10 1 <2 <4 <1 <3 <2 <3 <7 <1 <1 < 14 <4 07/01/10 - 07/29/10 1 <2 <4 <1 <3 <2 <3 <8 <1 <2 < 15 <5 08/05/10 - 08/26/10 1 <2 <3 <1 <3 <2 <3 <8 <1 <1 < 14 <4 09/02/10 - 09/30/10 2 <3 <6 <2 <5 <3 <5 < 14 <2 <3 < 26 <8 10/07/10 - 10/28/10 2 <2 <5 <2 <4 <2 <4 < 12 <2 <2 < 21 <6 11/04/10 - 11/24/10 1 <1 <3 <1 <2 <1 <2 <7 <1 <1 < 12 <4 12/02/10 - 12/30/10 1 <1 <3 <1 <2 <1 <3 <7 <1 <1 < 14 <4 MEAN BD-25 01/07/10 01/28/10 <3 <3 <6 <2 <5 <3 <5 *15 <3 <3 < 27 <6 02/04/10 02/25/10 <4 <3 <10 <4 <9 <4 <8 < 15 <4 <4 < 29 < 11 03/04/10 03/25/10 <1 <1 <3 <1 <2 <1 <3 <7 <1 <1 < 39 < 12 04/01/10 04/29/10 <2 <2 <4 <2 <3 <2 <3 < 11 <1 <2 < 18 <6 05/06/10 05/27/10 <2 <2 <5 <2 <4 <2 <4 < 14 <2 <2 < 22 <7 06/03/10 06/24/10 <2 <2 <5 <2 <5 <2 <4

10 <2 <2 < 19 <6 07/01/10 07/29/10 <2 <2 <4 <2 <3 <2 <3 < 11 <2 <2 < 19 <5 08/05/10 08/26/10 <2 <2 <5 <2 <4 <2 <4 < 13 <2 <2 < 22 <6 09/02/10 09/30/10 <2 <2 <6 <2 <5 <3 <5 < 12 <2 <2 < 23 <8 10/07/10 10/28/10 <2 <2 <5 <2 <4 <2 <4 < 11 <2 <2 < 19 <6 11/04/10 11/24/10 <1 <2 <4 <2 <3 <2 <3 < 10 <1 <1 < 16 <5 12/02/10 12/30/10 <1 <1 <3 <1 <2 <1 <2 <6 <1 <1 < 12 <4 MEAN

TABLE C-l.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-38 01/07/10 - 01/28/10 (1) < 3 <3 <6 <2 <5 <3 <5

14 <2 <3 < 28 <8 2/4/2010 - 02/25/10 <3 <3 <8 <3 <7 <4 <6 < 13 <3 <3 < 27 <9 3/4/2010 - 03/25/10 <1 <1 <3 <1 <2 <1 <2 <7 <1 <1 < 35 < 11 04/01/10 - 04/29/10 <2 <2 <4 <2 <3 <2 <3 < 12 <2 <2 < 19 <6 05/06/10 - 05/27/10 <1 <2 <4 <1 <3 <2 <3

14 <1 <2 < 21 <5 06/03/10 - 06/24/10 <2 <2 <5 <2 <4 <2 <4 < 10 <2 <2 < 18 <6 07/01/10 - 07/29/10 <2 <2 <5 <2 <4 <2 <4 < 12 <2 <2 < 22 <7 08/05/10 - 08/26/10 <2 <2 <5 <2 <4 <2 <4 < 12 <2 <2 < 20 <6 09/02/10 - 09/30/10 <2 <2 <5 <2 <4 <3 <4 < 13 <2 <2 < 22 <7 c~I 10/07/10 - 10/28/10 <2 <2 <4 <2 <3 <2 <3 < 11 <2 <2 < 18 <6 11/04/10 - 11/24/10 <2 <2 <4 <1 <3 <2 <3 <11 <1 <2 < 18 <6 12/02/10 - 12/09/10 (1) < 7 <9 < 23 <8 < 15 <10 < 17 < 231 <6 <7 < 200 < 59 MEAN BD-40 01/07/10 - 01/28/10 <3 <3 <7 <3 <6 <3 <5 < 14 <2 <3 < 25 <9 2/4/2010 - 02/25/10 <3 <4 <8 <3 <6 <4 <6 < 15 <3 <3 < 30 < 10 3/4/2010 - 03/25/10 <1 <2 <4 <1 <2 <2 <3 <7 <1 <1 < 48 < 14 4/1/2010 - 04/29/10 <2 <2 <4 <2 <4 <2 <4 < 13 <2 <2 < 21 <6 05/06/10 - 05/27/10 <1 <1 <3 <1 <2 <1 <2 < 11 <1 <1 < 16 <4 06/03/10 - 06/24/10 <2 <3 <6 <2 <5 <3 <4 <11 <2 <2 < 20 <7 07/01/10 - 07/29/10 <2 <2 <5 <2 <4 <2 <4 < 12 <2 <2 < 20 <6 08/05/10 - 08/26/10 <2 <3 <5 <2 <4 <3 <4 *13 <2 <2 < 23 <7 09/02/10 - 09/30/10 <2 <2 <5 <2 <4 <3 <4 < 13 <2 <2 < 22 <7 10/07/10 - 10/28/10 <2 <2 <5 <2 <4 <2 <4 < 13 <2 <2 < 20 <7 11/04/10 - 11/24/10 <1 <1 <3 <1 <3 <2 <3 <9 <1 <1 < 16 <5 12/02/10 - 12/30/10 <1 <1 <3 <1 <2 <1 <3 <8 <1 <1 < 13 <4 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-1 37 Ba-140 La-140 PERIOD BD-55 01/07/10 - 01/28/10 (1) 2/4/2010 - 02/25/10 (1) 03/04/10 - 03/25/10 <1 <2 <4 <1 <3 <2 <3 < 10 <1 <1 < 47 < 15 4/1/2010 - 04/29/10 <I <1 <3 <1 <2 <1 <2 <9 <1 <1 < 13 <4 5/6/2010 - 05/27/10 <1 <2 <4 <2 <3 <2 <3 < 13 <1 <2 < 20 <5 6/3/2010 - 06/24/10 <2 <2 <6 <2 <5 <3 <5 *13 <2 <3 < 22 <7 7/1/2010 - 07/29/10 <2 <2 <5 <2 <4 <2 <4 < 11 <2 <2 < 20 <6 8/5/2010 - 08/26/10 <2 <2 <4 <2 <4 <2 <4 < 11 <2 <2 < 19 <7 09/02/10 - 09/30/10 <1 <1 <3 <1 <2 <1 <2 <8 <1 <1 < 13 <4 10/07/10 - 10/28/10 <2 <2 <4 <2 <3 <2 <3 < 12 <2 <2 <19 <6 11/04/10 - 11/24/10 <2 <2 <4 <2 <3 <2 <3 < 13 <2 <2 < 20 <6 12/02/10 - 12/02/10 (1) < 10 < 13 < 10 <9 < 23 < 13 < 26 < 596 < 10 < 10 < 468 < 129 MEAN BD-56 01/07/10 01/28/10 (1) 2/4/2010 02/25/10 (1) 03/04/10 03/25/10 <1 <1 <4 <1 2 <2 <2 <7 <1 <1 < 40 11 04/01/10 04/29/10 <1 <2 <4 <1 3 <2 <3 < 10 <1 <1 < 17 6 05/06/10 05/27/10 <1 <1 <3 <1 2 <1 <2 < 10 <1 <1 < 17 5 06/03/10 06/24/10 <2 <2 <6 <2 5 <3 <5 < 12 <2 <2 < 23 7 7/1/2010 07/29/10 <2 <2 <5 <2 4 <2 <4 < 12 <2 <2 < 23 7 8/5/2010 08/26/10 <2 <2 <5 <2 3 <2 <4

12 <2 <2 < 20 6 9/2/2010 09/30/10 <2 <2 <6 <3 5 <3 <4 < 14 <2 <2 < 25 7 10/07/10 10/28/10 <2 <2 <5 <2 4 <2 <4

13 <2 <2 < 22 8 11/04/10 11/24/10 <1 <2 <4 <1 3 <2 <3 < 13 <1 <1 < 20 6 12/02/10 12/02/10 (1) < 9 < 10 < 27 <8 17 < 13 < 19 < 444 <7 <7 < 326 108 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-I1.1 CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD r

12131/09 - 01/28/10 2.9 +/- 1.9 01/28/10 - 02/25110 5.8 +/- 1.8 02/25/10 - 04/01/10 2.6 +/- 1.7 04/01/10 - 04/29/10 2.4 +/- 1.6 04/29/10 - 06/03/10 2.8 +/- 1.8 06/03/10 - 07/01/10 < 2.7 07/01/10 - 07/29/10 6.4 +/- 1.8 07/29/10 - 09/02/10 3.9 +/- 1.8 09/02/10 - 09/30/10 3.3 +/- 1.8 09/30/10 - 10/28/10 < 3.7 10/28/10 - 12/02/10 3.9 +/- 1.7 12/02/10 - 12/30/10 < 3.4 MEAN 3.8 +/- 2.8 TABLE C-11.2 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD U

12/31/09 - 01/28/10 < 181 01/28/10 - 02/25/10 230 + 109 02/25/10 - 04/01/10 < 159 04/01/10 - 04/29/10

161 04/29/10 - 06/03/10 < 161 06/03/10 - 07/01/10 < 170 07/01/10 - 07/29/10 < 170 07/29/10 - 09/02/10 < 189 09/02/10 - 09/30/10 723 + 134 09/30/10 - 10/28/10 2950 +/- 345 10/28/10 - 12/02/10 213 +/- 86 12/02/10 - 12/30/10 < 170 MEAN 1029 +/- 2605

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-5

TABLE C-II.3 CONCENTRATIONS OF GAMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-22 12/31/09 - 01/28/10 <3 <3 <7 <3 <6 <4 <6 <5 <3 <3 <44 <15 01/28/10 - 02/25/10 <1 <1 <4 <1 <2 <2 <2 <9 <1 <1 < 42 15 02/25/10 - 04/01/10 <1 <1 <2 <1 <2 <1 <2 < 13 <1 <1 < 14 4 04/01/10 - 04/29/10 <2 <2 <4 <2 <3 <2 <4 <13 <2 <2 < 20 7 04/29/10 - 06/03/10 <1 <1 <2 <1 <2 <1 <2 < 13 <1 <1 < 16 5 06/03/10 - 07/01/10 <2 <2 <4 <2 <3 <2 <3 < 14 <1 <1 < 19 7 07/01/10 - 07/29/10 <1 <1 <3 <1 <3 <2 <3 <5 <1 <2 < 12 4 07/29/10 - 09/02/10 <2 <2 <4 <2 <3 <2 <3 < 15 <1 <2 < 21 7 09/02/10 - 09/30/10 <4 <4 <9 <5 <8 <4 <9

14 <4 <4 < 30 9 09/30/10 - 10/28/10 <1 <2 <4 <2 <3 <2 <3 <8 <1 <2 < 14 5 10/28/10 - 12/02/10 <1 <1 <2 <1 <2 <1 <2 < 13 <1 <1 < 16 6 12/02/10 - 12/30/10 <2 <2 <4 <2 <4 <2 <4 <7 <2 <2 < 14 5 MEAN

TABLE C-I11.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-13 BD-34 BD-35 BD-36 BD-37 BD-50 BD-51 BD-53 BD-54 PERIOD U

01/21/10 - 03/18/10 < 186 < 180 < 168 < 180 < 185 (1) < 189 < 175 < 188 04/08/10 - 04/22/10 < 162 < 161 < 157 < 161 < 156 < 173 < 159 < 157 < 160 07/08/10 - 07/08/10 < 163 < 161 < 160 180 +/- 109 < 163

165 < 160 < 162 < 162 10/14/10 - 10/14/10 < 194 < 192 < 193 242 +/- 131 < 194 < 194 < 195 < 192 < 190 MEAN 211 +/- 88

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7

TABLE C-111.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDIWELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-1 37 Ba-140 La-140 PERIOD BD-13 01/14/10 - 01/14/10 <2 <2 <4 <2 <3 <2 <3 <7 <2 <2 < 14 5 04/08/10 - 04/08/10 <4 <4 <9 <4 <7 <5 <8 < 12 <4 <4 < 22 10 07/08/10 - 07/08/10 <4 <4 <9 <5 <8 <5 <8 <7 <5 <4 < 20 7 10/14/10 - 10/14/10 <4 <3 <8 <4 <6 <4 <6 < 11 <3 <4 < 25 9 MEAN BD-34 01/14/10 - 01/14/10 <2 <2 <4 <1 <3 <2 <3 <7 <1 <2 < 14 4 04/08/10 - 04/08/10 <4 <4 <9 <5 <9 <5 <8 < 13 <5 <4 < 28 10 07/08/10 - 07/08/10 <5 <6 < 11 <4 <9 <6 < 10 < 10 <5 <5 < 26 8 10/14/10 - 10/14/10 <4 <4 < 10 <4 <9 <5 <9 < 15 <4 <5 < 32 10 MEAN 00 BD-35 03/18/10 - 03/18/10 <5 <6 < 14 <5 *10 <6 < 10 < 12 <5 <6 < 29 8 04/08/10 - 04/08/10 <5 <6 < 10 <4 < 12 <6 <9 < 13 <4 <5 < 40 8 07/08/10 - 07/08/10 <5 <5 <9 <4 < 10 <5 <7 <8 <5 <5 < 25 7 10/14/10 - 10/14/10 <5 <5 <11 <5 <10 <6 <8 < 14 <4 <5 < 37 13 MEAN BD-36 01/14/10 - 01/14/10 <1 <2 <4 <1 <3 <2 <3 <6 <1 <2 < 12 <4 04/08/10 - 04/08/10 <5 <5 < 14 <5 <11 <5 < 11 < 15 <3 <5 < 31 <8 07/08/10 - 07/08/10 <7 <7 < 13 <7 < 16 <7 < 13 < 14 <8 <7 < 32 < 11 10/14/10 - 10/14/10 <3 <3 <7 <3 <7 <4 <6 < 11 <3 <3 < 22 <7 MEAN BD-37 01/14/10 - 01/14/10 <2 <2 <5 <2 <4 <3 <4 < 10 <2 <2 < 19 <6 04/08/10 - 04/08/10 <5 <5 <9 <5 < 10 <6 <8 < 15 <5 <5 < 37 < 10 07/08/10 - 07/08/10 <6 <5 < 15 <5 < 13 <6 < 11 <9 <5 <6 < 30 <9 10/14/10 - 10/14/10 <5 <5 < 10 <5 <8 <5 <8 < 14 <4 <4 < 31 < 11 MEAN

TABLE C-1II.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-50 01114/10 - 01/14/10 (1) 04/22/10 - 04/22/10 <1 <2 <4 <2 <3 <2 <3 <15 <1 <2 < 21 7 07/08/10 - 07/08/10 <4 <4 <8 <5 <8 <5 <7 <7 <4 <5

21 6 10/14/10 - 10/14/10 <3 <4 <9 <5 <8 <5 <8 <14 <4 <4 < 29 8 MEAN BD-51 01/21/10 - 01/21/10 <7 <7 < 13 <5 < 12 <8 < 12 < 14 <5 <7

38 13 04/08/10 - 04/08/10 <4 <4 <9 <4 <8 <4 <8 < 11 <4 <5 < 28 6 07/08/10 - 07/08/10 <5 <7 < 10 <5 < 10 <5 < 10 < 10 <4 <6 < 28 6 10/14/10 - 10/14/10 <4 <4 <8 <3 <7 <4 <8 < 13 <4 <4

30 7 MEAN c-BD-53 01/14/10 - 01/14/10 <2 <2 4 <2 <4 <2 <4 <9 <2 2 16 6 04/08/10 - 04/08/10 <5 <6 13 <5 <11 <6 < 10 < 14 <5 6 35 11 07/08/10 - 07/08/10 <4 <5 11 <5 <11 <5 <9 <9 <4 5 26 9 10/14/10 - 10/14/10 <4 <5 10 <4 <9 <4 <7 < 15 <4 5 35 9 MEAN BD-54 01/14/10 - 01/14/10 <2 <2 4 <2 <3 <2 <3 <8 <2 <2 <14 < 5 04/08/10 - 04/08/10 <3 <4 8 <3 <7 <4 <7 <12 <4 <4 <25 < 6 07/08/10 - 07/08/10 <6 <6 13 <6 < 15 <7 < 11 <11 <7 <6 <31 < 9 10/14/10 - 10/14/10 <3 <3 7 <3 <7 <4 <7 <13 <3 <4 <28 < 6 MEAN (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION

TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-25 Golden Redhorse 05/18/10 < 63 < 75 < 199 < 46 < 161 < 77 < 139 < 1640 < 72 < 60 < 1680 < 412 Quillback 05/18/10 < 37 < 61 < 115 < 34 < 96 < 63 < 98 < 936 < 36 < 40 < 972 < 347 Channel Catfish 10/12/10 < 47 < 40 < 82 < 40 < 91 < 47 < 65 < 80 < 44 < 42 < 235 < 86 Golden Redhorse 10/12/10 < 61 < 64 < 147 < 74 < 120 < 60 < 121 < 111 < 52 < 59 < 325 < 112 MEAN BD-28 Freshwater Drum 05/18/10 < 44 < 51 < 115 < 27 < 85 < 65 < 101 < 1080 < 42 < 49 < 1090 < 297 Quillback 05/18/10 < 24 < 32 < 71 < 28 < 67 < 38 < 55 < 494 < 20 < 30 < 660 < 101 Golden Redhorse 10/12/10 < 40 < 51 < 103 < 49 < 88 < 48 < 82 < 79 < 40 < 52 < 266 < 91

(-D Smallmouth bass 10/12/10 < 45 < 39 < 106 < 47 < 105 < 51 < 91 < 100 < 38 < 55 < 223 < 94 MEAN BD-41 Common Carp 05/18/10 < 37 < 46 < 82 < 30 < 80 < 43 < 80 < 725 < 34 < 33 < 892 < 217 Largemouth Bass 05/18/10 < 62 < 79 < 165 < 55 < 150 < 92 < 137 < 1390 < 94 < 57 < 1380 < 440 Common Carp 10/12/10 < 18 < 18 <32 <25 <34 < 18 < 36 < 30 < 15 < 16 <85 <25 Largemouth Bass 10/12/10 < 59 < 56 < 126 < 58 < 128 < 63 < 106 < 107 < 54 < 51 < 324 < 94 MEAN

TABLE C-V.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-10 05/20/10 < 76 < 96 < 254 < 72 < 178 < 117 < 161 < 68 165 +/- 65 < 1480 < 568 10/07/10 <32 < 32 < 74 < 38 <69 <40 < 57 < 28 108 +/- 28 < 188 < 67 MEAN 137 +/- 81 -

BD-57 05/20/10 <34 < 45 < 73 < 39 < 78 < 45 < 59 < 28 < 47 < 684 < 147 10/07/10 < 33 < 38 < 89 < 45 < 86 < 43 < 76 < 32 < 35 < 284 < 68 MEAN

TABLE C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP II GROUP 11 IGROUP III PERIOD BD-06 U BD-19 BD-20 BD-21 BD-02 BD-04 BD-05 BD-03 U 12/31/09 - 01/07/10 24 +/- 4 26 +/- 4 25 +/- 4 26 +/- 4 29 +/- 4 27 +/- 4 27 +/- 4 33 +/- 4 01/07/10 - 01/14/10 29 +/- 5 28 +/- 5 26 +/- 5 30 +/- 5 29 +/- 5 32 +/- 5 30 +/- 5 32 +/- 5 01/14/10 - 01/21/10 37 +/- 6 40 +/- 6 32 +/- 5 28 +/- 5 29 +/- 5 32 +/- 5 33 +/- 5 28 +/- 5 01/21/10 - 01/28/10 19 +/- 4 20 +/- 5 19 +/- 5 21 +/- 5 20 +/- 5 18 +/- 4 23 +/- 5 16 +/- 4 01/28/10 - 02/04/10 24 +/- 5 19 +/- 5 24 +/- 5 24 +/- 5 17 +/-5 23 +/- 5 26 +/- 5 28 +/- 5 02/04/10 - 02/11/10 23 +/- 5 18 +/- 4 20 +/- 4 20 +/- 4 15 +/-4 23 +/- 5 15 +/- 4 18 +/- 4 02/111/10 - 02/18/10 16 +/- 4 16 +/- 4 12 +/- 4 17 +/- 4 21 +/-4 14 +/- 4 13 +/- 4 16 +/- 4 02118/10 - 02/25/10 20 +/- 5 20 +/- 5 21 +/- 5 21 +/- 5 21 +/-5 21 +/- 5 25 +/- 5 20 +/- 5 02/25/10 - 03/04/10 13 +/- 4 12 +/- 4 11 +/-4 15 +/- 4 12 +/-4 13 +/- 4 13 +/- 4 13 +/- 4 03/04/10 - 03/11/10 21 +/- 4 19 +/- 4 22 +/-5 20 +/- 5 21 +/-5 23 +/- 5 24 +/- 5 31 +/- 6 03/11/10 - 03/18/10 9+/-4 7+/-4 11 +/-4 14 +/- 4 11 +/-4 9+/-4 10 +/- 4 11 +/-4 03/18/10 - 03/25/10 13 +/-4 14 +/-4 13 +/-4 14 +/- 4 9+/-4 14 +/-4 13 +/- 4 14 +/-4 03/25/10 - 04/01/10 19 +/-4 15 +/-4 20 +/-5 20 +/- 5 15 +/-4 19 +/-4 17 +/- 4 17 +/-4 04/01/10 - 04/08/10 14 +/-4 15 +/-4 16 +/-4 16 +/- 4 15 +/-4 13 +/-4 13 +/- 4 11 +/-4 04/08/10 - 04/15/10 21 +/-4 18 +/-4 16 +/-4 14 +/- 4 19 +/-4 17 +/-4 18 +/- 4 19 +/-4 04/15/10 - 04/22/10 10 +/-4 13 +/-4 13 +/-4 11 +/-4 9+/-4 12 +/-4 14 +/- 4 14 +/-4 04/22/10 - 04/29/10 13 +/-4 14 +/-4 12 +/-4 10 +/-4 14 +/-4 12 +/-4 15 +/- 5 (1) 10 +/-4 04/29/10 - 05/06/10 13 +/-4 13 +/-4 17 +/-4 14 +/-4 14 +/-4 12 +/- 4 14 +/- 4 14 +/-4 05/06/10 - 05/13/10 <6 <6 7+/-4 8+/-4 9+/-4 6+/-4 9+/-4 <6 05/13/10 - 05/20/10 9+/- 8+/-4 11 +/-4 8+/-4 10 +/-4 15 +/-4 9+/-4 12 +/-4 05/20/10 - 05/27/10 19+/- 15 +/-4 14 +/-4 17 +/-4 17 +/-4 18 +/-4 14 +/-4 21 +/-4 05/27/10 - 06/03/10 17+/- (1) 15 +/- 4 16 +/-4 17 +/- 4 16 +/-4 16 +/-4 16 +/-4 16 +/-4 06/03/10 - 06/10/10 16+/- 13 +/- 4 10 +/-4 16 +/- 4 16 +/-4 22 +/-10 (1) 13 +/-4 14 +/-4 06/10/10 - 06/17/10 7+/- 14 +/- 4 9+/-4 10 +/- 4 13 +/-4 15 +/-4 12 +/-4 13 +/-4 06/17/10 - 06/24/10 11+/- 10 +/- 4 14 +/-4 15 +/- 4 11 +/-4 11 +/-4 10 +/-4 7+/-4 06/24/10 - 07/01/10 11+/- 10 +/- 4 13 +/-4 14 +/- 4 12 +/-4 12 +/-4 12 +/-4 14 +/-4 07/01/10 - 07/08/10 16 +/- 18 +/- 4 19 +/-4 17 +/- 4 19 +/-4 15 +/-4 17 +/-4 19 +/-4 07/08/10 - 07/15/10 21 +/- 23 +/- 5 22 +/-5 21 +/- 4 26 5 21 +/-4 20 +/-4 22 +/-5 07/15/10 - 07/22/10 25 +/- 23 +/- 4 26 +/-4 22 +/- 4 21 +/-4 27 +/-4 23 +/-4 24 +/-4 07/22/10 - 07/29/10 16 +/- 14 +/- 4 18 +/-5 16 +/- 4 15 +/-4 13 +/-4 17 +/-4 16 +/-4 07/29/10 - 08/05/10 17 +/- 22 +/- 5 25 +/-5 21 +/- 4 21 +/-4 19 +/-4 26 +/-5 22 +/- 5 08/05/10 - 08/12/10 26 +/- 22 +/- 4 31 +/-4 29 +/- 4 24 +/-4 29 +/-4 28 +/-4 27 +/- 4 08/12/10 - 08/19/10 22 +/- 24 +/- 5 23 +/-5 22 +/- 5 22 5 (1) 21 +/-4 23 +/-5 22 +/- 5 08/19/10 - 08/26/10 18 +/- 21 +/- 5 23 +/-5 6+/-4 22 5 22 +/-5 20 +/-5 26 +/- 5 08/26/10 - 09/02/10 20 +/- 22 +/- 4 20 +/-4 17 +/-4 21 +/-4 21 +/-4 22 +/-4 23 +/- 4 09/02/10 - 09/09/10 19 +/- 15 +/- 4 15 +/-4 14 +/-4 17 +/-4 15 +/-4 15 +/-4 18 +/- 4 09/09/10 - 09/16/10 17 +/- 18 +/- 5 21 5 20 +/-5 20 +/- 5 20 +/-5 15 +/- 5 21 +/- 5 09/16/10 - 09/23/10 17 +/- 17 +/- 4 20 +/-4 16 +/-4 18 +/- 4 17 +/-4 22 +/- 4 18 +/- 4 09/23/10 - 09/30/10 20 +/- 16 +/- 4 18 +/-4 23 +/-4 21 +/- 4 20 +/-4 21 +/- 4 24 +/- 5 09/30/10 - 10/07/10 20 +/- 18 +/- 4 18 +/-4 16 +/-4 19 +/- 4 18 +/-4 22 +/- 4 16 +/- 3 10/07/10 - 10/14/10 38 +/- 39 +/- 6 41 +/-6 38 +/-6 38 +/- 6 35 +/-5 43 +/- 6 35 +/- 5 10/14/10 - 10/21/10 23 +/- 16 +/- 4 27 +/-5 22 +/-5 23 +/- 5 24 +/-5 17 +/- 4 22 +/- 5 10/21/10 - 10/28/10 17 +/- 15 +/- 4 16 +/-4 18 +/-4 18 +/- 4 17 +/-4 18 +/- 4 16 +/- 4 10/28/10 - 11/04/10 16 +/- 13 +/- 3 13 +/- 3 15 +/-4 15 +/- 3 14 +/- 3 11 +/-3 18 +/- 4 11/04/10 - 11/11/10 20 +/- 17 +/- 4 21 +/- 4 22 +/-4 23 +/- 4 18 +/- 4 19 +/-4 18 +/- 4 11/11/10 - 11/18/10 35 +/- 37 +/- 4 34 +/- 4 27 +/- 4 33 +/- 4 31 +/- 4 36 +/-4 37 +/- 4 11/18/10 - 11/24/10 18 +/- 18 +/- 5 18 +/- 5 17 +/- 5 22 +/- 5 27 +/- 5 18 +/-5 20 +/- 5 11/24/10 - 12/02/10 33 +/- 28 +/- 4 30 +/- 4 29 +/- 4 32 +/- 4 29 +/- 4 29 +/-4 30 +/- 4 12/02/10 - 12/09/10 23 +/- 22 +/- 5 22 +/- 5 22 +/- 5 26 +/- 5 29 +/- 5 24 +/-5 19 +/- 4 12/09/10 - 12/16/10 29 +/- 29 +/- 4 30 +/- 4 27 +/- 4 28 +/- 4 24 +/- 4 25 +/- 4 31 +/- 4 12/16/10 - 12/23/10 40 +/- 29 +/- 4 30 +/- 4 36 +/- 4 22 +/- 4 37 +/- 4 38 +/- 4 42 +/- 4 12/23/10 - 12/30/10 27 +/- 25 +/- 5 25 +/- 5 21 +/- 4 26 +/- 5 23 +/- 5 26 +/- 5 25 +/- 5 MEAN 20 +/-15 19 +/-14 20 +/-14 19 +/-13 20 +/-13 20 +/-14 20 +/-15 21 +/-15

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-12

TABLE C-VI.2 MONTHLY AND YEARLY VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - NEAR FIELD LOCATIONS GROUP II - FAR FIELD LOCATIONS GROUP III - CONTROL LOCATIONS COLLECTION MIN MAX MEAN +/- COLLECTION MIN MAX MEAN+/- COLLECTION MIN MAX MEAN+/-

PERIOD 2SD PERIOD 2SD PERIOD 2SD U I 12/31/09 - 01/28/10 19 40 27 +/- 12 1"Jl'J* I*lU e-i.JIIvu -

III I'J*1111 U IOI-0IU q*

10 "J'J 00 27 +/- 1U 12/31/U9 - Ul/28/10 16 33 27 15 1

01/28/10 - 02/25/10 12 24 20 +/- 7 01/28/10 02/25/10 13 26 19 +/- 9 01/28/10 - 02/25/10 16 28 21 +/-11 02/25/10 - 04/01/10 7 22 15 +/- 9 02/25/10 04/01/10 9 24 15 +/- 10 02/25/10 - 04/01/10 11 31 17 +/- 16 04/01/10 - 04/29/10 10 21 14 +/- 6 04/01/10 04/29/10 9 19 14 +/- 6 04/01/10 - 04/29/10 10 19 14 +/-8 04/29/10 - 06/03/10 7 19 13 +/- 7 04/29/10 06/03/10 6 18 13 +/- 7 04/29/10 - 06/03/10 12 21 16 +/-8 06/03/10 - 07/01/10 7 16 12 +/- 5 06/03/10 07/01/10 10 22 13 +/- 7 06/03/10 - 07/01/10 7 14 12 +/-7 07/01/10 - 07/29/10 14 26 20 +/- 7 07/01/10 07/29/10 13 27 19 +/- 9 07/01/10 - 07/29/10 16 24 20 +/-7 07/29/10 - 09/02/10 6 31 22 +/- 10 07/29/10 09/02/10 19 29 23 +/- 6 07/29/10 - 09/02/10 22 27 24 _4 09/02/10 - 09/30/10 14 23 18 +/- 5 09/02/10 09/30/10 15 22 18 +/- 5 09/02/10 - 09/30/10 18 24 20 +/-6 09/30/10 - 10/28/10 15 41 24 +/- 19 09/30/10 10/28/10 17 43 24 +/- 18 09/30/10 - 10/28/10 16 35 23 +/- 18 10/28/10 - 12/02/10 13 37 23 +/- 16 10/28/10 12/02/10 11 36 24 +/- 16 10/28/10 - 12/02/10 18 37 25 +/- 17 12/02/10 - 12/30/10 21 40 27 +/- 10 12/02/10 12/30/10 22 38 27 +/- 10 12/02/10 - 12/30/10 19 42 29 +/- 20 12/31/09 - 12130/10 6 41 19 +/- 14 12/31/09 - 12/30/10 6 43 20 +/- 14 12/31/09 - 12/30/10 7 42 21 +/- 15

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-02 12/31/09 - 04/01 /10 <3 <3 <9 <3 <5 <3 <6 <3 <2 < 109 < 56 04/01/10 - 07/01,/10 <3 <3 <7 <2 <6 <4 <6 <3 <4 < 39 <9 07/01/10 - 09/30J/10 <3 <5 <9 <4 <7 <5 <8 <3 <3 < 65 < 17 09/30/10 - 12/30//10 <2 <3 <5 <2 <5 <2 <3 <2 <2 < 20 <11 MEAN BD-03 12/31/09 04/01/10 <3 <4 < 14 <4 <4 <6 <7 <3 <2 < 130 < 70 04/01/10 07/01/10 <4 <4 <9 <5 < 11 <5 <8 <4 <3 < 56 < 23 07/01/10 09/30/10 <3 <2 <6 <2 <5 <3 <6 <2 <2 < 38 < 18 09/30/10 12/30/10 <3 <3 <8 <3 <4 <2 <7 <3 <3 < 38 < 11 MEAN BD-04 12/31/09 04/01/10 <3 <3 <6 <4 <8 <5 <7 <3 <2 < 122 < 50 04/01/10 07/01/10 <4 <5 < 10 <6 <11 <4 <7 <4 <4 < 52 < 16 07/01/10 09/30/10 <3 <2 <8 <3 <4 <3 <4 <2 <2 < 52 < 21 09/30/10 12/30/10 <3 <4 <7 <4 <8 <4 <6 <4 <3 < 40 < 17 MEAN BD-05 12/31/09 04/01/10 <3 <5 14 <3 < 10 5 <8 <4 <4 < 182 < 68 04/01/10 07/01/10 <4 <6 8 <1 <7 6 < 10 <4 <3 < 43 < 16 07/01/10 09/30/10 <2 <3 7 <2 <6 3 <6 <2 <2 < 57 < 28 09/30/10 12/30/10 <2 <3 6 <2 <5 3 <4 <2 <2 <-26 <5 MEAN BD-06 12/31/09 04/01/10 <3 <4 < 16 <3 <9 <3 9 <3 <3 < 190 < 57 04/01/10 07/01/10 <3 <4 <8 <4 <8 <3 5 <3 <2 < 35 < 21 07/01/10 09/30/10 <3 <4 < 12 <4 <6 <4 7 <3 <3 < 82 <34 09/30/10 12/30/10 <3 <3 <9 <3 <7 <4 6 <3 <3 < 41 <9 MEAN

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-19 12/31/09 - 04/01 /10 <3 <6 < 13 <4 <9 <5 <9 <3 <3 < 195 72 04/01/10 - 07/01 /10 <3 <3 <8 <5 <8 <4 <9 <4 <4 < 49 23 07/01/10 - 09/30 /10 <2 <3 <6 <3 <7 <4 <6 <3 <2 < 56 24 09/30/10 - 12/30 /10 <3 <3 <6 <3 <6 <3 <5 <3 <2 < 28 15 MEAN BD-20 12/31/09 04/01/10 <3 <4 <9 <3 <6 <4 <6 <2 <2 < 158 60 04/01/10 07/01/10 <4 <4 < 13 <4

10 <6 <8 <4 <3 < 45 17 07/01/10 09/30/10 <3 <4 < 10 <4 < 10 <4 <7 <3 <3 < 77 35 09/30/10 12/30/10 <2 <3 <5 <2 <4 <2 <4 <2 <2 < 21 15 MEAN C.'

BD-21 12/31/09 04/01/10 <4 <4 < 14 <3 9 <5 <6 <3 <4 < 192 < 93 04/01110 07/01/10 <3 <3 <9 <3 8 <3 <4 <3 <3

38 < 13 07/01/10 09/30/10 <2 <3 <6 <1 5 <2 <5 <1 <2 < 55 < 18

<3 <6 <3 5 <3 <7 <3 <3 < 36 <9 09/30/10 12/30/10 <3 MEAN

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I I GROUP 11 IGROUP III PERIOD BD-06 BD-19 BD-20 BD-21 BO-02 BD-04 BD-05 BD-03 12/31/09 - 01/07/10 < 38

53

53

53 < 37 < 21 < 38 < 37 01/07/10 - 01/14/10 < 22

22

22 < 22 < 27 < 27 < 27 < 27 01/14/10 - 01/21/10 < 63

58

58

58 < 63 < 63 < 27 < 63 01/21/10 - 01/28/10 < 41 < 41 < 41 < 41

35 < 35 < 35 < 35 01/28/10 - 02/04/10 < 21

52

52

52 < 42 < 42 < 42 < 42 02/04/10 - 02/11/10 < 49 < 49 < 49 < 49

37 < 37 < 37 < 38 02/11/10 - 02/18/10 < 31

13

31

31 < 29 < 29 < 29 < 29 02/18/10 - 02/25/10 < 35 < 35

35 < 35 < 26 < 26 < 26 < 26 02/25/10 - 03/04/10 < 38

38

16

38

26 *<26 < 26 < 25 03/04/10 - 03/11/10 < 40 *<41 < 41 < 42 < 43 *<43 < 43 < 53 (1) 03/11/10 - 03/18/10 < 59

59

25

59

37 < 37 < 37 < 37 03/18/10 - 03/25/10 < 33

33

33

33

32 < 32 < 32 < 32 03/25/10 - 04/01/10 < 33 < 41 < 41 < 41

18 < 33 < 33 < 33 04/01/10 - 04/08/10 < 55

55

55

55 < 41 *<41 < 42 < 41 04/08/10 - 04/15/10 < 24

33

33

33 < 24 < 24 < 24 < 13 04/15/10 - 04/22/10 < 38

37 < 37

37 < 29 < 28 < 29 < 29 04/22/10 - 04/29/10 < 30

39

39

39

30 04/29/10 - 05/06/10 < 40 *<40 < 40 < 40

33 *<33 < 33 < 33 05/06/10 - 05/13/10 < 28 < 41 < 41 < 41

28 < 28 < 15 < 29 (1) 05/13/10 - 05/20/10 < 28

28

28 < 28

38 *<39 < 39 < 38 05/20/10 - 05/27/10 < 12

29

29 < 29

27 < 27 < 27 < 27 05/27/10 - 06/03/10 < 62 (1) < 62

62

63

56 < 56 < 56 < 56 06/03/10 - 06/10/10 < 42

20 < 43 < 43

36 < 19 (1) < 37 < 37 06/10/10 - 06/17/10 < 38

38

38

38

35 < 35 < 35 < 35 06/17/10 - 06/24/10 < 30

30

13

30 < 27 < 27 < 27 < 27 06/24/10 - 07/01/10 < 50

50

50

50

39 < 40 < 40 < 40 07/01/10 - 07/08/10 < 38

38 < 38

16 < 35 < 35 < 35 < 35 07/08/10 - 07/15/10 < 38

38

38

38

37 < 37 < 37 < 37 07/15/10 - 07/22/10 < 21 *<25 < 26

25

12 *<21 < 21 < 22 07/22/10 - 07/29/10 < 32

32

33

32

25 < 26 < 26 < 25 07/29/10 - 08/05/10 < 36

36

36

36

31 *<31 < 32 < 17 08/05/10 - 08/12/10 < 30

30

31

31

27 *<27 < 27 < 27 08/12/10 - 08/19/10 < 19

28

28 < 28

19 (1) < 19 < 19 < 19 08/19/10 - 08/26/10 < 55

55

53

55 < 41 < 41 < 41 < 41 08/26/10 - 09/02/10 < 48 *<40 < 40 < 40 < 48 < 48 < 20 < 48 09/02/10 - 09/09/10 < 41 *<41 < 41 < 41

32 < 32 < 32 < 32 09/09/10 - 09/16/10 < 27

51

51

51 < 43 < 44 < 44 < 44 09/16/10 - 09/23/10 < 29

30

30

30

24 < 24 < 24 < 24 09/23/10 - 09/30/10 < 44

24 < 44 < 44

59 *<59 < 59 < 59 09/30/10 - 10/07/10 < 57

57 < 57

57

39 *<39 < 38 < 38 10/07/10 - 10/14/10 < 37

37 < 20

37

54 *<54 < 37 < 54 10/14/10 - 10/21/10 < 38

38

38

38

38 *<38 < 38 < 38 10/21/10 - 10/28/10 < 33

33

33

18 < 48 < 48 < 48 < 48 10/28/10 - 11/04/10 < 49 < 49 < 49 < 49 < 43 *<43 < 43 < 43 11/04/10 - 11/11/10 < 41 < 45 < 45 < 45

23 *<41 < 41 < 41 11/11/10 - 11/18/10 < 36

36

37

37 < 40 *<40 < 40 < 40 11/18/10 - 11/24/10 < 59

60

60 < 60

67 < 67 < 67 < 67 11/24/10 - 12/02/10 < 48 < 48 < 48 < 48

53 *<53 < 53 < 54 (1) 12/02/10 - 12/09/10 < 55 < 47 < 47 < 47 < 55 *<23 < 55 < 55 12/09/10 -12/16/10 < 65

65 < 65

65

60 *<60 < 60 < 60 12/16/10 -12/23/10 < 64 < 64 < 64 *<64

56 < 56 < 56 < 56 12/23/10 -12/30/10 < 68 < 68 < 68

68

57 *<57 < 57 < 57 MEAN C-16

TABLE C-VIII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARM I INDICATOR FARM COLLECTION BD-18 BD-17 PERIOD 01/08/10 < 0.2 < 0.4 02/04/10 < 0.6 < 0.5 03/04/10 < 0.7 < 0.7 04/01/10 < 0.5 < 0.7 05/06/10 < 0.9 < 0.8 05/20/10 < 0.6 < 0.6 06/04/10 < 0.5 < 0.6 06/17/10 < 0.9 < 0.9 07/03/10 < 0.7 < 0.6 07/15/10 < 0.6 < 0.5 07/29/10 < 0.6 < 0.7 08/12/10 < 0.9 < 0.9 08/26/10 < 0.9 < 0.8 09/09/10 < 0.7 < 0.7 09/23/10 < 0.6 < 0.6 10/07/10 < 0.7 < 0.7 10/21/10 < 1.0 < 0.7 11/04/10 < 0.8 < 0.7 12102/10 < 0.4 < 0.4 MEAN C-17

TABLE C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-1 34 Cs-137 Ba-140 La-140 PERIOD BD-17 01/07/10 <5 <6 < 14 <6 < 14 <7 <9 <6 <6 < 27 <9 02/04/10 <7 <8 < 18 <6 < 14 <8 < 11 <8 <8 < 30 <9 03/04/10 <3 <3 <7 <3 <7 <3 <5 <3 <3 < 13 <4 04/01/10 <7 <8 < 18 <7 < 14 <8 *14 <6 <8 < 37 < 11 05/06/10 <8 <9 < 14 <8 < 20 < 11 < 16 <8 < 10 < 57 < 12 05/20/10 <2 <3 <7 <2 <5 <3 <5 <2 <2 < 32 < 10 06/03/10 <5 <5 < 13 <4 *10 <5 <8 <4 <5 < 30 <6 06/17/10 <6 <7 < 18 <6 < 16 <7 < 10 <6 <7 < 42 < 12 07/03/10 <6 <5 < 14 <6 < 13 <7 < 11 <5 <6 < 28 <8 00 07/15/10 <7 <7 < 16 <7 < 17 <7 < 15 <7 <8 < 32 <8 07/29/10 <5 <6 < 12 <6 < 12 <6 < 11 <5 <6 < 50 < 15 08/12/10 <8 <8 < 19 <7 <18 <8 < 14 <7 <7

52 < 13 08/26/10 <4 <5 < 14 <5 < 12 <6 <9 <4 <5 < 45

14 09/09/10 <6 <6 < 14 <7 < 14 <7 < 12 <5 <6 < 53 < 14 09/23/10 <4 <5 < 11 <6 < 10 <5 <8 <5 <5 < 18 <5 10/07/10 <8 <8 < 17 < 10 < 22 <8 < 13 <8 <8 < 36 < 11 10/21/10 <5 <6 < 14 <7 < 14 <6 < 10 <6 <5 < 29 <5 11/04/10 <7 <8 <16 <9 < 18 <7 < 14 <7 <8 < 39 < 13 12/02/10 <6 <6 < 14 <6 < 16 <7 < 12 <5 <7

38 <8 MEAN

TABLE C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-18 01/08/10 <8 <8 < 16 <9 < 18 < 11 < 13 <7 <7 < 30 < 12 02/04/10 <5 <6 < 11 <6 < 14 <6 < 11 <5 <5 < 23 <7 03/04/10 <4 <4 < 10 <5 <9 <5 <8 <4 <5 < 21 <6 04/01/10 <7 <7 < 16 <6

13 <8 < 12 <7 <7 < 36 <9 05/06/10 <8 <8 < 13 <9 < 15 <8 < 16 <7 <9 < 47 < 15 05/20/10 <2 <2 <6 <2 <4 <2 <4 <2 <2

32 <8 06/04/10 <6 <8 < 21 <9 < 18 <8 < 11 <6 <8 < 40 < 14 06/17/10 <5 <5 < 11 <4 < 10 <6 < 11 <5 <6

38 < 10 07/03/10 <5 <5 *13 <5 < 11 <6 <9 <5 <5 < 25 <7 07/15/10 <8 <7 < 16 <6 < 15 <7 < 12 <7 <8 < 31 <8 07/29/10 <5 <6

12 <5 <11 <6 < 10 <5 <5 < 48 < 14 08/11/10 <6 <6 < 15 <6 < 14 <6 <9 <6 <6 < 39 <7 08/26/10 <5 <5 < 12 <5

13 <6 <9 <4 <5 < 46 < 13 09/09/10 <6 <7 *17 <7

13 <7 < 12 <6 <6 < 53 < 14 09/23/10 <5 <5 < 13 <7 < 12 <5 < 10 <5 <6 < 24 <8 10/07/10 <6 <6 < 12 <7 < 14 <7 < 10 <5 <6 < 30 < 10 10/21/10 <5 <4 < 10 <6 <11 <4 <8 <4 <5 < 23 <7 11/04/10 <6 <7 *17 <9 < 16 <7 < 12 <5 <6 < 39 < 14 12/02/10 <7 <7 < 17 <9 < 16 <8 < 12 <6 <6 <44 < 13 MEAN

TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PC/KG WET +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-1 34 Cs-137 Ba-140 La-140 PERIOD BD-CONTROL 09/06/10 Cabbage <8 < 10 < 24 < 11 < 20 < 11 < 18 < 8 <9 < 100 < 23 09/06/10 Onions <8 < 8 < 22 <8 < 16 <9 < 16 < 7 <8 < 93 < 26 MEAN BD-QUAD 1 09/06/10 Beets < 9 < 11 <27 < 12 <20 < 11 < 18 <8 < 10 < 100 < 19 09/06/10 Cabbage < 9 < 11 <28 < 11 <23 < 12 < 19 <8 < 10 < 96 < 26 MEAN n BD-QUAD 2 09/06/10 Cabbage < 10 < 11 < 32 < 13 < 26 < 12 < 21 < 9 < 10 < 99 < 29 09/06/10 Potatoes < 19 < 20 < 53 < 20 < 41 < 25 < 38 < 15 < 17 < 311 < 93 MEAN - - - - - - - - - -

BD-QUAD 3 09/06/10 Cabbage < 9 <9 <26 < 11 <20 < 10 < 18 <7 <9 <98 < 28 09/06/10 Potatoes < 9 < 10 <23 < 11 <20 < 10 < 18 <7 <9 <99 < 26 MEAN BD-QUAD 4 09/06/10 Cabbage < 8 < 10 <27 < 10 <21 < 11 < 18 < 7 < 10 < 94 < 26 09/06/10 Potatoes < 9 < 10 < 28 < 12 < 23 < 12 < 19 <8 < 11 < 100 < 25 MEAN

TABLE C-X.1 QUARTERLY TLD RESULTS FOR BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +2 n BD-02-1 38.5 +/- 80.7 99 (1) 20 BD-02-2 53.3 +/- 141.1 159 (1) 21 BD-03-1 56.3 +/- 146.4 166 (1) 22 BD-03-2 38.5 +/- 75.6 95 (1) 23 BD-04-1 58.0 +/- 153.4 173 (1) 22 BD-04-2 64.5 +/- 180.7 200 (1) 23 BD-05-1 58.5 +/- 155.4 175 (1) 22 BD-05-2 62.8 +/- 175.1 194 (1) 22 BD-06-1 76.8 +/- 235.0 253 (1) 21 BD-06-2 66.5 +/- 190.1 209 (1) 21 BD-19-1 51.0 +/- 121.4 142 (1) 21 BD-19-2 44.8 +/- 101.7 121 (1) 21 BD-20-1 44.8 +/- 103.0 122.(1) 21 BD-20-2 76.8 +/- 233.7 252 (1) 22 BD-21-1 42.3 +/- 93.0 112 (1) 21 BD-21-2 53.8 +/- 137.8 157 (1) 23 BD-101-3 52.3 +/- 133.0 152 (1) 21 BD-101-4 39.3 +/- 82.4 101 (1) 21 BD-102-1 52.3 +/- 135.7 154 (1) 20 BD-102-2 76.8 +/- 229.8 249 (1) 24 BD-103-1 65.0 +/- 182.7 202 (1) 22 BD-103-2 58.3 +/- 153.1 173 (1) 22 BD-104-1 41.3 +/- 94.5 112 (1) 21 BD-104-2 46.0 + 116.0 133 (1) 19 BD-105-1 71.3 +/- 209.0 228 (1) 22 BD-105-2 68.0 +/- 197.4 216 (1) 22 BD-106-1 45.0 +/- 104.0 123 (1) 20 BD-106-2 60.0 +/- 164.0 183 (1) 21 BD-107-1 46.8 +/- 107.0 127 (1) 22 BD-107-2 57.0 +/- 154.8 173 (1) 22 BD-108-1 71.8 +/- 211.0 230 (1) 21 BD-108-2 40.0 +/- 84.2 103 (1) 21 BD-109-1 79.0 +/- 226.8 249 (1) 27 BD-109-2 62.0 +/- 161.4 183 (1) 23 BD-110-1 63.5 +/- 174.1 194 (1) 22 BD-110-2 57.0 +/- 153.4 172 (1) 21 BD-112-1 72.5 +/- 216.7 235 (1) 20 BD-112-2 37.0 +/- 70.9 90 (1) 23 BD-114-1 52.0 +/- 130.7 150 (1) 19 BD-114-2 43.3 +/- 98.4 117 (1) 20 BD-115-1 45.8 +/- 104.4 124 (1) 22 BD-115-2 78.3 +/- 241.1 259 (1) 22 BD-116-1 66.8 +/- 191.0 210 (1) 21 BD-116-2 60.0 +/- 165.4 184 (1) 20 BD-201-1 69.3 +/- 185.0 208 (1) 25 BD-201-2 52.8 +/- 128.5 149 (1) 25 BD-202-1 77.0 +/- 230.7 250 (1) 21 BD-202-2 44.0 +/- 104.0 122 (1) 20 BD-203-1 44.0 +/- 96.0 116 (1) 22 BD-203-2 55.3 +/- 149.1 167 (1) 21 BD-204-1 53.3 +/- 139.7 158 (1) 20 (1) ALL FIRST QUARTER TLDS WERE EXPOSED IN TRANSIT C-21

TABLE C-X.1 QUARTERLY TLD RESULTS FOR BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

BD-204-2 76.3 +/- 237.0 254 (1) 16 16 19 BD-205-1 44.0 +/- 101.4 120 (1) 20 16 20 BD-205-2 52.5 +/- 142.1 159 (1) 17 14 20 BD-206-1 61.8 +/- 167.0 187 (1) 19 19 22 BD-206-2 68.8 +/- 200.4 219 (1) 18 17 21 BD-207-1 62.8 +/- 175.0 194 (1) 18 18 21 BD-207-2 41.5 +/- 91.4 110 (1) 18 17 21 BD-208-1 44.3 +/- 101.0 120 (1) 18 18 21 BD-208-2 50.3 +/- 129.0 147 (1) 18 16 20 BD-209-1 49.8 +/- 108.3 131 (1) 23 22 23 BD-209-2 52.0 +/- 112.0 136 (1) 24 22 26 BD-210-1 50.3 +/- 116 137 (1) 20 21 23 BD-210-2 56.5 +/- 148.7 168 (1) 18 18 22 BD-211-1 52.8 +/- 109.7 135 (1) 26 23 27 BD-211-2 57.3 +/- 137.1 160 (1) 22 21 26 BD-212-3 40.0 +/- 80.1 100 (1) 19 18 23 BD-2122-4 49.8 +/- 108.4 131 (1) 21 22 25 BD-213-3 44.5 +/- 100.8 120 (1) 18 17 23 BD-213-4 52.5 +/- 132.8 152 (1) 21 15 22 BD-214-1 40.5 +/- 82.1 102 (1) 18 20 22 BD-214-2 68.0 +/- 185.4 207 (1) 20 20 25 BD-215-1 57.0 +/- 150.7 170 (1) 18 18 22 BD-215-2 64.5 +/- 191.4 208 (1) 17 14 19 BD-216-1 47.8 +/- 105.7 127 (1) 20 20 24 BD-216-2 56.8 +/- 152.4 171 (1) 18 16 22 BD-111A-1 50.0 +/- 117.4 138 (1) 22 18 22 BD-111A-2 81.8 +/- 252.4 271 (1) 17 18 21 BD-113A-1 52.5 +/- 132.7 152 (1) 18 19 21 BD-113A-2 53.3 +/- 139.7 158 (1) 17 18 20 (1) ALL FIRST QUARTER TLDS WERE EXPOSED IN TRANSIT C-22

TABLE C-X.2 MEAN QUARTLY TLD RESULTS FOR THE INNER RING, OUTER RING, OTHER AND CONTROL LOCATIONS FOR BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF MILLI-ROENTGENS/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION SITE BOUNDARY INTERMEDIATE DISTANCE OTHER CONTROL PERIOD +/- 2 S.D.

JAN-MAR (1) 173.3 +/- 101.1 157.3 +/- 81.7 169.1 +/- 97.4 130.5 +/- 100.4 APR-JUN 18.6 +/- 3.3 19.3 +/- 4.4 18.6 +/- 3.0 19.0 +/- 2.8 JUL-SEP 17.4 +/- 2.7 18.2 +/- 5.0 17.0 +/- 2.5 17.5 +/- 4.2 OCT-DEC 21.4 +/- 3.0 22.3 +/- 4.3 21.5 +/- 1.7 22.5 +/- 1.4 TABLE C-X.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

SITE BOUNDARY 128 15.0 271.0 57.7 +/- 143.1 INTERMEDIATE DISTANCE 128 14.0 254.0 54.3 +/- 126.2 OTHER 56 15.0 253.0 56.6 +/- 139.5 CONTROL 8 16.0 166.0 47.4 +/- 109.5 SITE BOUNDARY STATIONS - BD-101-3, BD-101-4, BD-102-1, BD-102-2, BD-103-1, BD-103-2, BD-104-1, BD-104-2, BD-105-1, BD-105-2, BD-106-1, BD-106-2, BD-107-1, BD-107-2, BD-108-1, BD-108-2, BD-109-1, BD-109-2, BD-110-1, BD-110-2, BD-111A-1, BD-1 1 1A-2, BD-1 12-1, BD-1 12-2, BD-1 13A-1, BD-1 13A-2, BD-1 14-1, BD-1 14-2, BD-1 15-1, BD-1 15-2, BD-1 16-1, BD-1 16-2 INTERMEDIATE DISTANCE STATIONS - BD-201-1, BD-201-2, BD-202-1, BD-202-2, BD-203-1, BD-203-2, BD-204-1, BD-204-2, BD-205-1, BD-205-2, BD-206-1, BD-206-2, BD-207-1, BD-207-2, BD-208-1, BD-208-2, BD-209-1, BD-209-2, BD-210-1, BD-210-2, BD-211-1, BD-211-2, BD-212-3, BD-212-4, BD-213-3, BD-213-4, BD-214-1, BD-214-2, BD-215-1, BD-215-2, BD-216-1, BD-216-2 OTHER STATIONS - BD-02-1, BD-02-2, BD-04-1, BD-04-2, BD-05-1, BD-05-2, BD-06-1, BD-06-2, BD-19-1, BD-19-2, BD-20-1, BD-20-2, BD-21-1, BD-21-2 CONTROL STATIONS - BD-03-1, BD-03-2 (1) ALL FIRST QUARTER TLDS WERE EXPOSED IN TRANSIT C-23

FIGURE C-1 Surface Water - Gross Beta - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-10 Kankakee River, Downstream 10.0 .

8.0 6.0-

-J 4.0 2.0

0.0 I i . I ;

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04

'0o0,o BD-25 (C) Kankakee River, Upstream 8,0--

4.0 --

2.0-01-01.00 12- 31-00 0 0.00 0 I 12-31-01 12-3I "t-02 12-31-03 '12-30-04 C-24

FIGURE C-1 (cont.)

Surface Water - Gross Beta - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-10 Kankaee River, Downstream 10.0 "-

8.0 6.0 +

C.

4.0 ý 2.0 +

N I **WM 0.0 I. I I I I I 01-27-05 04-05-06 06-12-07 08-18-08 10-25-09 01-01-11 BD-25 (C) Kankakee River, Upstream 16.0 14.0-12.0 10.0

~jX~

0.. 8.0 CL 6.0 4.0 2.0 0.0 I 01-27-05 04-05-06 06-12-07 08-18-08 10-25-09 01-01-11 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-25

FIGURE C-2 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2007 - 2010 BD-38 Main Drainage Ditch 14.0 12.0 10.0 UCL 8.0 a.

6.0 4.0 2.0 0.0 01-25-07 11-08-07 08-21-08 06-04-09 03-18-10 12-30-10 BD-40 Braidwood Station Cooling Lake 16.0 14.0 12.0 10.0 "

-.J 8.0 a.

6.0 4.0 2.0 0.0 10-05-06 08-10-07 06-14-08 04-19-09 02-22-10 12-28-10 NEW STATION BD-40 ADDED ON 10/05/06 NEW STATION BD-38 ADDED ON 01/25/07 C-26

FIGURE C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2010 BD-55 North Pond Fatlan Site 14.0 12.0 10.0 8.0 C.

6.0 4.0 2.0 (4ý 0.0 01-25-07 11-08-07 08-21-08 06-04-09 03-18-10 12-30-10 BD-56 South Pond Fatlan Site 10.0 T 8.0 +

-J 6.0 4.0 I! 0 kill"'

2.0 +

0.0 i i i i 01-25-07 11-08-07 08-21-08 06-04-09 03-18-10 12-30-10 NEW STATIONS BD-55 AND BD-56 ADDED ON 01/04/07 GAPS IN DATA ARE DUE TO SAMPLING POINTS BEING PROZEN AT TIME OF COLLECTION C-27

FIGURE C-4 Surface Water - Tritium - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2000-2004 2600 T BD-10 Kankakee River, Downstream 2300 2000 1,100.

1400.

-J rU 1100 800 500 200 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 '12-30-04 BD-25 Kankakee River, Upstream 400 -

r 300 +

200 +

-J 1004-0-

100 It

-200 ! l l l J ! !

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-28

FIGURE C-4 (cont.)

Surface Water - Tritium - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-10 Kankakee River, Downstream 2400 2100 1800 1500 O 1200 900 600 300 0 I I I 03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 BD-25 (C) Kankakee River, Upstream 400 -r 300 +

200 ý C.)

100 +

n I I I 03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-29

FIGURE C-5 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2010 BD-38 Main Drainage Ditch 2400 2100 1800

-j 1500 C.L

a. 1200 900 600 300 0

03-09-06 02-23-07 02-09-08 01-25-09 01-11-10 12-28-10 BD-40 Braidwood Station Cooling Lake 400 300 CL 200 a,

100 0 I 07-20-06 06-10-07 04-30-08 03-21-09 02-09-10 12-31-10 NEW STATIONS BD-38 AND BD-40 ADDED IN 2006 C-30

FIGURE C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2010 BD-55 North Pond Fatlan Site 250 200 150 C.)

100 +

50 +

0i I I I I 03-29-07 12-28-07 09-27-08 06-28-09 03-29-10 12-28-10 BD-56 South Pond Fatlan Site 250 200 150 -1

-J C.)

100 4-50 +

0 I 03-29-07 12-28-07 09-27-08 06-28-09 03-29-10 12-28-10 NEW STATIONS BD-55 AND BD-56 ADDED IN 2007 C-31

FIGURE C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-22 Wilmington 10.0 -

8.0-

6.0 4.0.-.-*

I -

2.0 -,

0.0 I I I 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30,-04 C-32

FIGURE C-7 (cont.)

Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-22 Wilmington 10.0 8.0 6.0 CL 4.0 2.0 0.0 I-01-01-05 03-15-06 05-27-07 08-07-08 10-19-09 12-31-10 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-33

FIGURE C-8 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-22 Wilmington 7600 7200 6800 6400 60O00 5600 5200 4800 4400 4000

, 3600 3200 2800 2400 2000 1600 1200 808 400 0

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-34

FIGURE C-8 (cont.)

Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-22 Wilmington 7600 7200 6800 6400 6000 5600 5200 4800 4400 4000 CL

0. 3600 L

3200 2800 2400 2000 1600 1200 800 400 0

01-01-05 03-15-06 05-27-07 08-07-08 10-19-09 12-31-10 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-35

FIGURE C-9 Ground/Well Water - Tritium - Stations BD-13 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2004 5o0o BD-13 Braidwood City Hall Well 400 300 200 100--

04.

-200 p p 01-01 -00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 700 BD-34 Gibson Well 600 500 400 o 300-200 100 0

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-36

FIGURE C-9 (cont.)

Ground/Well Water - Tritium - Stations BD-13 and BD-34 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-13 Braidwood City Hall Well 500 T 400 +

300 +

C.

200 4 100 +

NJ I I I I 03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 BD-34 Gibson Well 700 600 500

-J 400 0.

300 200 100 0 -

03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER C-37

FIGURE C-10 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2004 500 BD-35 Joly Well 400 300

-J

' 200 100-7z 0-

-100 i 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 BD-36 Hutton Well 900.r 800 700 600 a.

400 300 7.

200 100-n I I I 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-38

FIGURE C-10 (cont.)

Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-35 Joly Well 500 -

400 ,-

CJ 300 4 C.)

200 1 100 +

n I I I I I I 03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 BD-36 Hutton Well 1200 T 1000 +

800 +

C.

600 +

400 *

"CL 200 n0 I I I I 03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER C-39

FIGURE C-11 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-37 Nurczyk Well 450 -

350+

250 t

-J o150-CL

50 4 1 -3

-1~flJ I 12-3*1-00 12-31-01 12-31-03 12-30-04 01-01-00 12-31-02 C-40

FIGURE C-ll (cont.)

Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-37 Nurczyk Well 600 t 500 400 C.L

0. 300 200 100 0 i I I I I I 03-31-05 05-25-06 07-19-07 09-11-08 11-05-09 12-30-10 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER C-41

FIGURE C-12 Ground/Well Water - Tritium - Station BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2007-2010 BD-50 Skole Well 1000 900 800 700 600 C.,

500 0.

400 300 200 100 0 I I I I I 10-20-07 08-07-08 05-26-09 03-14-10 12-31-10 01-01-07 BD-51 Fatlan Well 600 500 +

400 +

300 200 100 o 1 I I I 01-03-07 10-21-07 08-07-08 05-25-09 03-12-10 12-28-10 NEW STATIONS BD-50 AND BD-51 ADDED IN 2007 STATION BD-50 WAS INITIALLY DISCONTINUED ON 10/18/07 AND RESUMED ON 04/08/10 C-42

-. FIGURE C-13 Ground/Well Water - Tritium - Station BD-53 and BD-54 Collected in the Vicinity of Braidwood Station, 2007 - 2010 BD-53 Phelps Well 600 500 +

400 +

CJ

0. 300 +

200 100 -

0 4-01-03-07 10-21-07 08-07-08 05-25-09. 03-12-10 12-28-10 BD-54 Cash Well 600 +

500 +

400 +

0. 300 +

200 100 0 I I I I 01-03-07 10-21-07 08-07-08 05-25-09 03-12-10 12-28-10 NEW STATIONS BD-53 AND BD-54 ADDED IN 2007 C-43

FIGURE C-14 Air Particulates - Gross Beta- Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-03 (C) County Line Road 10.0 8.0 P 6.0 U

C.

CIA 9

4.0 2.0 -

0.0 -

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 BD-06 Godley 10.0 8.0 6.0 S

a.

N 9

uJ 4.0 2.0- 1 0.0 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-44

FIGURE C-14 (cont.)

Air Particulates - Gross Beta- Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-03 (C) County Line Road 80.0 60.0 r:

0. 40.0 co III 20.0 0.0 I-01-06-05 03-19-06 05-30-07 08-09-08 10-20-09 12-31-10 BD-06 Godley 50.0 40.0 E

m 30.0 9 20.0 Lu Q

10.0 0.0 4 01-06-05 03-19-06 05-30-07 08-09-08 10-20-09 12-31-10 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C-45

FIGURE C-15 Air Particulates - Gross Beta- Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-19 Nearsite, NW 10.0 8.0 6.0 cm 9

4.0 2.0 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 BD-20 Nearsite, N 10.0 8.0 6.0 rj C-

9. 4.0 2.0 0.0 4--- --- r -... .. . .

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-46

FIGURE C-15 (cont.)

Air Particulates - Gross Beta- Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-19 Nearsite, NW 50.0 40.0 E

30.0 C.

20.0 10.0 0.0 I 01-06-05 03-19-06 05-30-07 08-09-08 10-20-09 12-31-10 BD-20 Nearsite, N 50.0 40.0 E 30.0 C.)

0.

9 a* 20.0 w

10.0 0.0 4-01-06-05 03-19-06 05-30-07 08-09-08 10-20-09 12-31-10 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C-47

FIGURE C-16 Air Particulates - Gross Beta- Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2004 BD-21 Nearsite, NE 10.0 8.0 6.0 a..

4.0 2.0 0.0 ""

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 C-48

FIGURE C-16 (cont.)

Air Particulates - Gross Beta- Station BD-21 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-21 Nearsite, NE 60.0 50.0 40.0 L 30.0 uo Z 20.0 10.0 0.0 01-06-05 03-19-06 05-30-07 08-09-08 10-20-09 12-31-10 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C-49

FIGURE C-17 Air Particulates - Gross Beta- Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-02 Nearsite, NW 50.0 40.0 30.0 a.

C.)

, 20.0 I1.

10.0 0.0 I 07-07-05 08-11-06 09-15-07 10-19-08 11-23-09 12-28-10 BD-04 Nearsite, N 60.0 50.0 40.0 C.)

30.0 uJ M 20.0 10.0 0.0 I 07-07-05 08-11-06 09-15-07 10-19-08 11-23-09 12-28-10 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C-50

FIGURE C-18 Air Particulates - Gross Beta- Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2010 BD-05 Nearsite, NE 60.0 50.0 c)40.0 E

CL 30.0 20.0 10.0 0.0 4-07-07-05 08-11-06 09-15-07 10-19-08 11-23-09 12-28-10 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C-51

Intentionally left blank APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

Intentionally left blank TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2010 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

March 2010 E6978-396 Milk Sr-89 pCi/L 89.3 92.8 0.96 A Sr-90 pCi/L 13.8 12.7 1.09 A E6979-396 Milk 1-131 pCi/L 65.2 74.0 0.88 A Ce-141 pCi/L 241 261 0.92 A Cr-51 pCi/L 388 361 1.07 A Cs-1 34 pCi/L 157 178 0.88 A Cs-1 37 pCi/L 150 158 0.95 A Co-58 pCi/L 143 143 1.00 A Mn-54 pCi/L 202 207 0.98 A Fe-59 pCi/L 146 137 1.07 A Zn-65 pCi/L 247 254 0.97 A Co-60 pCi/L 177 183 0.97 A E6981-396 AP Ce-141 pCi 211 185 1.14 A Cr-51 pCi 304 255 1.19 A Cs-1 34 pCi 142 125 1.14 A Cs-137 pCi 131 ill 1.18 A Co-58 pCi 119 101 1.18 A Mn-54 pCi 162 146 1.11 A Fe-59 pCi 110 97 1.14 A Zn-65 pCi 217 179 1.21 W Co-60 pCi 145 129 1.12 A E6980-396 Charcoal 1-131 pCi 80.2 85.6 0.94 A June 2010 E7132-396 Milk Sr-89 pCi/L 82.0 93.4 0.88 A Sr-90 pCi/L 15.8 16.7 0.95 A E7133-396 Milk 1-131 pCi/L 83.5 96.9 0.86 A Ce-141 pCi/L 107 110 0.97 A Cr-51 pCi/L 325 339 0.96 A Cs-1 34 pCi/L 114 126 0.90 A Cs-137 pCi/L 144 150 0.96 A Co-58 pCi/L 92.3 101 0.91 A Mn-54 pCi/L 165 169 0.98 A Fe-59 pCi/L 121 119 1.02 A Zn-65 pCi/L 197 206 0.96 A Co-60 pCi/L 190 197 0.96 A E7135-396 AP Ce-141 pCi 88.4 91.6 0.97 A Cr-51 pCi 292 282 1.04 A Cs-134 pCi 101 105 0.96 A Cs-137 pCi 132 125 1.06 A Co-58 pCi 87.3 84.0 1.04 A Mn-54 pCi 150 140 1.07 A Fe-59 pCi 105 98.6 1.06 A Zn-65 pCi 168 171 0.98 A Co-60 pCi 170 163 1.04 A E7134-396 Charcoal 1-131 pCi 76.4 79.9 0.96 A D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2010 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

September2010 E7229-396 Milk Sr-89 pCi/L 85.0 92.8 0.92 A Sr-90 pCi/L 12.6 14.7 0.86 A E7230-396 Milk 1-131 pCi/L 80.2 94.1 0.85 A Ce-141 pCi/L 130 130 1.00 A Cr-51 pCi/L 235 234 1.00 A Cs-1 34 pCi/L 83.2 93.0 0.89 A Cs-1 37 pCi/L 95.1 94.5 1.01 A Co-58 pCi/L 77.3 73.7 1.05 A Mn-54 pCi/L 121 119 1.02 A Fe-59 pCi/L 96.4 91.1 1.06 A Zn-65 pCi/L 216 204 1.06 A Co-60 pCi/L 172 171 1.01 A E7232-396 AP Ce-141 pCi 122 119 1.03 A Cr-51 pCi 228 214 1.07 A Cs-134 pCi 79.9 85.3 0.94 A Cs-137 pCi 93.8 86.7 1.08 A Co-58 pCi 71.5 67.6 1.06 A Mn-54 pCi 113 110 1.03 A Fe-59 pCi 73.8 83.6 0.88 A Zn-65 pCi 186 187 0.99 A Co-60 pCi 163 157 1.04 A E7231-396 Charcoal 1-131 pCi/L 62.3 59.9 1.04 A December2010 E7375-396 Milk Sr-89 pCi/L 92.7 98.0 0.95 A Sr-90 pCi/L 13.5 13.5 1.00 A E7376-396 Milk 1-131 pCi/L 87.9 96.9 0.91 A Ce-141 pCi/L not provided by Analytics for this study Cr-51 pCi/L 389 456 0.85 A Cs-1 34 pCi/L 137 157 0.87 A Cs-1 37 pCi/L 172 186 0.92 A Co-58 pCi/L 84.3 90.2 0.93 A Mn-54 pCi/L 120 120 1.00 A Fe-59 pCi/L 134 131 1.02 A Zn-65 pCi/L 162 174 0.93 A Co-60 pCi/L 284 301 0.94 A E7378-396 AP Ce-141 pCi not provided by Analytics for this study Cr-51 pCi 387 365 1.06 A Cs-1 34 pCi 135 126 1.07 A Cs-1 37 pCi 157 149 1.05 A Co-58 pCi 73.6 72.3 1.02 A Mn-54 pCi 88.7 96 0.92 A Fe-59 pCi 127 105 1.21 W Zn-65 pCi 151 139 1.09 A Co-60 pCi 249 241 1.03 A D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2010 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

December 2010 E7377-396 Charcoal 1-131 pCi 79.6 84.2 0.95 A (a) Teledyne Brown Engineeringreportedresult.

(b) The Analytics known value is equal to 100% of the parameterpresent in the standardas determinedby gravimetricand/or volumetric measurements made during standardpreparation.

(c) Ratio of Teledyne Brown Engineering to Analytics results.

(d) Analytics evaluation based on TBE internal QC limits: A= Acceptable. Reported result falls within ratio limits of 0.80-1.20.

W-Acceptable with warning. Reported result falls within 0. 70-0.80 or 1.20-1.30. N = Not Acceptable. Reported result falls outside the ratio limits of < 0.70 and > 1.30.

D-3

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2010 (PAGE 1 OF 1)

Identification Reported Known Month/Year Number Media Nuclide Units Value (a) Value (b) Control Limits Evaluation (c)

May 2010 RAD-81 Water Sr-89 pCi/L 64.4 60.4 48.6 - 68.2 A Sr-90 pCi/L 37.8 41.3 30.4 - 47.4 A Ba-1 33 pCi/L 66.4 65.9 54.9 - 72.5 A Cs-1 34 pCi/L 66.43 71.6 58.4 - 78.8 A Cs-1 37 pCi/L 137.33 146 131 - 163 A Co-60 pCi/L 83.33 84.5 76.0 - 95.3 A Zn-65 pCi/L 177 186 167-219 A Gr-A pCi/L 26.37 32.9 16.9-42.6 A Gr-B pCi/L 28.77 37.5 24.7 -45.0 A 1-131 pCi/L 26.27 26.4 21.9-31.1 A H-3 pCi/L 12967 12400 10800 - 13600 A November 2010 RAD-83 Water Sr-89 pCi/L 77.8 68.5 55.8 - 76.7 N (1)

Sr-90 pCi/L 39.3 43.0 31.7 -49.3 A Ba-1 33 pCi/L 70.3 68.9 57.5 - 75.8 A Cs-1 34 pCi/L 39.9 43.2 34.5 -47.5 A Cs-137 pCi/L 117 123 111 -138 A Co-60 pCi/L 53.5 53.4 48.1 -61.3 A Zn-65 pCi/L 11.0 102 91.8-122 N (2)

Gr-A pCi/L 35.1 42.3 21.9 -53.7 A Gr-B pCi/L 35.5 36.6 24.0-44.2 A 1-131 pCi/L 27.9 27.5 22.9 - 32.3 A H-3 pCi/L 13233 12900 11200 - 14200 A (1) Sr-89 TSE to known ratio of 1.14 fell within acceptablerange of +/- 20%. No action required.NCR 10-09 (2) Zn-65 result of 111 was incorrectly reportedas 11.0. No action required. NCR 10-09 (a) Teledyne Brown Engineering reportedresult.

(b) The ERA known value is equal to 100% of the parameterpresent in the standardas determinedby gravimetricand/or volumetric measurements made during standardpreparation.

(c) ERA evaluation: A=acceptable. Reported result falls within the Warning Limits. NA=not acceptable. Reported result falls outside of the Control Limits. CE=checkfor Error. Reported result falls within the ControlLimits and outside of the Warning Limit.

D-4

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2010 (PAGE 1 OF 2)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Range Evaluation (c)

March 2010 10-MaW22 Water Cs-1 34 Bq/L -0.0942 (1) A Cs-1 37 Bq/L 58.5 60.6 42.4 - 78.8 A Co-57 Bq/L 27.2 28.3 19.8-36.8 A Co-60 Bq/L 0.0226 (1) A H-3 Bq/L 104 90.8 63.6- 118.0 A Mn-54 Bq/L 26.6 26.9 18.8 - 35.0 A Sr-90 Bq/L 0.1029 (1) A Zn-65 Bq/L 42.0 40.7 28.5 - 52.9 A 10-GrW22 Water Gr-A Bq/L 0.5173 0.676 0.00- 1.352 A Gr-B Bq/L 3.98 3.09 1.55-4.64 A 10-MaS22 Soil Cs-1 34 Bq/kg 665 733 513-953 A Cs-1 37 Bq/kg 800 779 545-1013 A Co-57 Bq/kg 508 522 365-679 A Co-60 Bq/kg 648 622 435-809 A Mn-54 Bq/kg 893 849 594-1104 A K-40 Bq/kg 597 559 391-727 A Sr-90 Bq/kg 221 288 202-374 W Zn-65 Bq/kg -4.97 (1) A 10-RdF22 AP Cs-134 Bq/sample 1.81 2.13 1.49-2.77 A Cs-1 37 Bq/sample 1.70 1.53 1.07-1.99 A (1)

Co-57 Bq/sample 0.0056 A Co-60 Bq/sample 2.65 2.473 1.731 - 3.215 A Mn-54 Bq/sample 3.70 3.02 2.11 -3.93 W Sr-90 Bq/sample 0.0523 (1) A Zn-65 Bq/sample -0.0627 (1) A 10-GrF22 AP Gr-A Bq/sample 0.1533 0.0427 0.00 - 0.854 A Gr-B Bq/sample 1.240 1.29 0.65-1.94 A 10-RdV22 Vegetation Cs-1 34 Bq/sample 4.48 4.39 3.07 - 5.71 A Cs-1 37 Bq/sample 3.43 3.06 2.14-3.98 A Co-57 Bq/sample -0.0117 (1) A Co-60 Bq/sample 3.55 3.27 2.29 -4.25 A Mn-54 Bq/sample 0.007 (1) A Sr-90 Bq/sample -0.0002 (1) A Zn-65 Bq/sample 8.12 7.10 4.97-9.23 A September 2010 10-MaW23 Water Cs-1 34 Bq/L 27.1 31.4 22.0-40.8 A Cs-1 37 Bq/L 41.8 44.2 30.9 - 57.5 A Co-57 Bq/L 33.2 36.0 25.2 - 46.8 A Co-60 Bq/L 26.5 28.3 19.8-36.8 A H-3 Bq/L 500 453.4 317.4 - 589.4 A Mn-54 Bq/L 0.024 (1) A Sr-90 Bq/L 8.10 8.3 5.8 - 10.8 A Zn-65 Bq/L 30.8 31.0 21.7-40.3 A 10-GrW23 Water Gr-A Bq/L 2.36 1.92 0.58 - 3.26 A Gr-B Bq/L 6.37 4.39 2.20 - 6.59 A D-5

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2010 (PAGE 2 OF 2)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Ranle Evaluation (c)

September 2010 10-MaS23 Soil Cs- 134 Bq/kg 837 940 658-1222 A Cs-1 37 Bq/kg 680 670 469-871 A Co-57 Bq/kg 2.78 (1) A Co-60 Bq/kg 350 343 240-446 A Mn-54 Bq/kg 853 820 574-1066 A K-40 Bq/kg 721 699 489-909 A Sr-90 Bq/kg 2.24 (1) A Zn-65 Bq/kg 287 265 186-345 A 10-RdF23 AP Cs-134 Bq/sample 2.31 2.98 2.09 - 3.87 W Cs-1 37 Bq/sample -0.025 (1) A Co-57 Bq/sample 3.64 4.08 2.86 - 5.380 A Co-60 Bq/sample 2.81 2.92 2.04 - 3.80 A Mn-54 Bq/sample 3.19 3.18 2.23-4.13 A Sr-90 Bq/sample 1.01 1.01 0.71 - 1.31 A Zn-65 Bq/sample 0.0310 (1) A 10-GrF23 AP Gr-A Bq/sample 0.004 (1) A Gr-B Bq/sample 0.473 0.50 0.25 - 0.75 A 10-RdV23 Vegetation Cs-134 Bq/sample 4.90 4.79 3.35 - 6.23 A Cs-137 Bq/sample 6.78 5.88 4.12-7.64 A Co-57 Bq/sample 10.2 8.27 5.79- 10.75 W Co-60 Bq/sample 0.00 (1) A Mn-54 Bq/sample 7.36 6.287 4.401 - 8.173 A Sr-90 Bq/sample 2.53 2.63 1.84 - 3.42 A Zn-65 Bq/sample 6.40 5.3900 3.77 - 7.01 A (1) Falsepositive test.

(a) Teledyne Brown Engineeringreported result.

(b) The MAPEP known value is equal to 100% of the parameterpresent in the standardas determined by gravimetricand/or volumetric measurements made during standardpreparation.

(c) DOE/MAPEPevaluation: A=acceptable, W=acceptablewith warning, N=not acceptable.

D-6

TABLE D-4 ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAMa ENVIRONMENTAL, INC., 2010 (Page 1 of 1)

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Resultb Resultc Limits Acceptance STW-1205 04/05/10 Sr-89 63.0 +/- 5.7 60.4 48.6 -68.2 Pass STW-1205 04/05/10 Sr-90 37.4 +/- 2.4 41.3 30.4 -47.4 Pass STW-1206 04/05/10 Ba-133 63.6 +/- 3.3 65.9 54.9 - 72.5 Pass STW-1206 04/05/10 Co-60 83.3 +/- 2.9 84.5 76.0 - 95.3 Pass STW-1206 04/05/10 Cs-134 71.0 +/- 3.4 71.6 58.4 -78.8 Pass STW-1206 04/05/10 Cs-137 145.5 +/- 5.1 146.0 131.0 - 163.0 Pass STW-1206 04/05/10 Zn-65 194.9 +/- 7.8 186.0 167.0 - 219.0 Pass STW-1207 04/05/10 Gr. Alpha 26.5 +/- 1.7 32.9 16.9 -42.6 Pass STW-1207 04/05/10 Gr. Beta 34.5 +/- 1.6 37.5 24.7 -45.0 Pass STW-1208 04/05/10 1-131 22.7 +/- 0.8 26.4 21.9 -31.1 Pass STW-1210 04/05/10 H-3 12955 +/- 332 12400.0 10800 - 13600 Pass STW-1224 10/04/10 Sr-89 65.3 +/- 5.7 68.5 55.8 - 76.7 Pass STW-1224 10/04/10 Sr-90 39.9 +/- 2.3 43.0 31.7 -49.3 Pass STW-1225 10/04/10 Ba-1 33 67.2 +/- 4.3 68.9 57.5 - 75.8 Pass STW-1225 10/04/10 Co-60 53.2 +/- 3.3 53.4 48.1 -61.3 Pass STW-1225 10/04/10 Cs-134 47.3 +/- 5.1 43.2 34.5 -47.5 Pass STW-1225 10/04/10 Cs-137 118.0 +/- 5.9 123.0 111.0 - 138.0 Pass STW-1225 10/04/10 Zn-65 107.0 +/- 8.7 102.0 91.8 - 122.0 Pass STW-1226 10/04/10 Gr. Alpha 30.7 +/- 2.9 42.3 21.9 -53.7 Pass STW-1226 10/04/10 Gr. Beta 32.7 +/- 0.8 36.6 24.0 -44.2 Pass STW-1227 10/04/10 1-131 28.6 +/- 1.1 27.5 22.9 -32.3 Pass STW-1229 10/04/10 H-3 13682 +/-352 12900.0 11200 -14200 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

b Unless otherwise indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.

D-7

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2010 (Page 1 of 3) b Concentration Known Control Lab Code c Date Analysis Laboratory result Activity Limits d Acceptance STVE-1 199 03/01/10 Co-57 0.01 +/- 0.03 0.00 Pass STVE-1 199 03/01/10 Co-60 3.39 +/- 0.12 3.27 2.29 - 4.25 Pass STVE-1 199 03/01/10 Cs-1 34 4.74 +/- 0.15 4.39 3.07 - 5.71 Pass STVE-1 199 03/01/10 Cs-1 37 3.32 +/- 0.17 3.06 2.14 -3.98 Pass STVE-1 199 03/01/10 Mn-54 0.01 +/- 0.05 0.00 Pass STVE-1 199 03/01/10 Zn-65 8.03 +/- 0.33 7.10 4.97 - 9.23 Pass STW-1200 03/01/10 Gr. Alpha 0.40 +/- 0.05 0.68 0.00 - 1.35 Pass STW-1200 03/01/10 Gr. Beta 3.03 +/- 0.07 3.09 1.55 - 4.64 Pass STW-1201 03/01/10 Co-57 28.90 +/- 0.40 28.30 19.80 - 36.80 Pass STW-1201 03/01/10 Co-60 0.06 +/- 0.05 0.00 Pass STW-1201 03/01/10 Cs-1 34 -0.03 +/- 0.09 0.00 Pass STW-1201 03/01/10 Cs-137 60.60 +/- 0.60 60.60 42.40 - 78.80 Pass STW-1201 03/01/10 H-3 93.20 +/- 18.30 90.80 63.60 - 118.00 Pass STW-1201 03/01/10 Mn-54 27.80 +/- 0.40 26.90 18.80 - 35.00 Pass STW-1201 03/01/10 Sr-90 -0.10 +/- 0.60 0.00 Pass STW-1201 03/01/10 Zn-65 42.70 +/- 0.80 40.70 28.50 - 52.90 Pass STSO-1202 03/01/10 Co-57 520.00 +/- 10.80 522.00 365.00 -679.00 Pass STSO-1 202 03/01/10 Co-60 599.10 +/- 2.80 622.00 435.00 -809.00 Pass STSO-1 202 03/01/10 Cs-1 34 666.10 +/- 4.70 733.00 513.00 -953.00 Pass STSO-1202 03/01/10 Cs-1 37 774.40 +/- 4.50 779.00 545.00 -1013.00 Pass STSO-1202 03/01/10 K-40 562.00 +/- 15.30 559.00 391.00 -727.00 Pass STSO-1 202 03/01/10 Mn-54 866.20 +/- 4.60 849.00 594.00 -1104.00 Pass STSO-1202 03/01/10 Sr-90 225.50 +/- 11.80 288.00 202.00 -374.00 Pass STSO-1202 03/01/10 Zn-65 -1.23 +/- 1.96 0.00 Pass STAP-1 203 03/01/10 Co-57 0.01 +/- 0.02 0.00 Pass STAP-1 203 03/01/10 Co-60 2.63 +/- 0.19 2.47 1.73 -3.22 Pass STAP-1 203 03/01/10 Cs-1 34 2.21 +/- 0.34 2.13 1.49 -2.77 Pass STAP-1203 03/01/10 Cs-1 37 1.66 +/- 0.22 1.53 1.07 -1.99 Pass STAP-1203 03/01/10 Mn-54 3.42 +/- 0.26 3.02 2.11 -3.93 Pass STAP-1203 03/01/10 Sr-90 0.02 +/- 0.06 0.00 Pass STAP-1203 03/01/10 Zn-65 -0.05 +/- 0.11 0.00 Pass STAP-1 204 03/01/10 Gr. Alpha 0.13 +/- 0.03 0.43 0.00 - 0.85 Pass STAP-1204 03/01/10 Gr. Beta 1.46 +/- 0.07 1.29 0.65-1.94 Pass D-8

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2010 (Page 2 of 3) b Concentration Known Control Lab Code c Date Analysis Laboratory result Activity Limits d Acceptance STW-1211 08/01/10 Co-57 36.40 +/- 4.80 36.00 25.20 - 46.80 Pass STW-1211 08/01/10 Co-60 28.30 +/- 1.00 28.30 19.80 - 36.80 Pass STW-1211 08/01/10 Cs-134 29.30 +/- 2.10 31.40 22.00 - 40.80 Pass STW-1211 08/01/10 Cs-137 44.60 +/- 1.80 44.20 30.90 - 57.50 Pass STW-1211 08/01/10 H-3 503.60 + 12.80 453.40 317.40 - 589.40 Pass STW-1211 08/01/10 K-40 38.50 + 2.50 38.90 27.20 - 50.60 Pass STW-1211 08/01/10 Mn-54 0.10 +/- 0.30 0.00 Pass STW-1211 08/01/10 Sr-90 9.20 +/- 1.30 8.30 5.80 - 10.80 Pass STW-1211 08/01/10 Zn-65 32.80 + 3.00 31.00 21.70 - 40.30 Pass STW-1212 08/01/10 Gr. Alpha 1.54 _ 0.09 1.92 0.58 - 3.26 Pass STW-1212 08/01/10 Gr. Beta 4.13 + 0.15 4.39 2.20 - 6.59 Pass SFVE-1 213 08/01/10 Co-57 9.60 +/- 0.54 8.27 5.79 - 10.75 Pass STVE-1213 08/01/10 Co-60 0.05 +/- 0.08 0.00 Pass STVE-1 213 08/01/10 Cs-1 34 4.83 +/- 0.26 4.79 3.35 - 6.23 Pass STVE-1 213 08/01/10 Cs-1 37 6.45 +/- 0.66 5.88 4.12 -7.64 Pass STVE-1213 08/01/10 Mn-54 7.12 +/- 0.66 6.29 4.40 -8.17 Pass STVE-1213 08/01/10 Zn-65 6.05 +/- 0.74 5.39 3.77 - 7.01 Pass STSO-1214 08/01/10 Co-57 0.10 +/- 1.60 0.00 Pass STSO-1214 08/01/10 Co-60 370.00 +/- 6.00 343.00 240.00 - 446.00 Pass STSO-1214 08/01/10 Cs-134 1005.00 +/- 21.00 940.00 658.00 - 1222.00 Pass STSO-1 214 08/01/10 Cs-1 37 755.00 +/- 15.00 670.00 469.00 - 871.00 Pass STSO-1 214 08/01/10 K-40 783.00 +/- 54.00 699.00 489.00 - 909.00 Pass STSO-1 214 08/01/10 Mn-54 942.00 +/- 15.00 820.00 574.00 - 1066.00 Pass STSO-1214 08/01/10 Sr-90 3.50 +/- 8.00 0.00 Pass STSO-1214 08/01/10 Zn-65 310.00 +/- 18.00 265.00 186.00 - 345.00 Pass STAP-1215 08/01/10 Co-57 4.47 +/- 0.21 4.08 2.86 - 5.30 Pass STAP-1215 08/01/10 Co-60 3.15 +/- 0.30 2.92 2.04 - 3.80 Pass STAP-1215 08/01/10 Cs-1 34 3.03 +/- 0.17 2.98 2.09 - 3.87 Pass STAP-1215 08/01/10 Cs-1 37 0.01 +/- 0.05 0.00 Pass STAP-1 215 08/01/10 Mn-54 3.69 +/- 0.39 3.18 2.23 -4.13 Pass STAP-1215 08/01/10 Sr-90 1.00 +/- 0.12 1.01 0.71 - 1.31 Pass STAP-1215 08/01/10 Zn-65 0.03 +/- 0.15 0.00 Pass D-9

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2010 (Page 3 of 3)

Concentration b Known Control Lab Code c Date Analysis Laboratory result Activity Limits d Acceptance STAP-1216 08/01/10 Gr. Alpha 0.01 +/- 0.01 0.00 Pa SS STAP-1216 08/01/10 Gr. Beta 0.54 +/- 0.05 0.50 0.25 - 0.75 Pa SS a Results obtained by Environmental,Inc., Midwest Laboratoryas a participantin the Departmentof Energy's Mixed Analyte Performance EvaluationProgram, Idaho Operationsoffice, Idaho Falls, Idaho b Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

c Laboratory codes as follows: STW (water), STAP (airfilter), STSO (soil), STVE (vegetation).

MAPEP results are presented as the known values and expected laboratoryprecision (1 sigma, 1 determination) and control limits as defined by the MAPEP.

e Included in the testing series as a "falsepositive".

D-1O

APPENDIX E EFFLUENT DATA

Intentionally left blank TABLE OF CONTENTS INTRODUCTION ......................................................................................................... 3 S UMMA R Y ........................................................................................................................... 4 1.0. EFFLUENTS .................................................................................................. 5 1.1. Gaseous Effluents to the Atmosphere .............................................. 5 1.2. Liquids Released to Kankakee River ............................................... 5 2.0. SOLID RADIOACTIVE W ASTE ................................................................. 5 3.0. DOSE TO MAN ............................................................................................. 6 3.1. Gaseous Effluent Pathways ............................................................. 6 3.1.1. Noble Gases ........................................................................ 6 3.1.1.1. Gamma Dose Rates ............................................. 6 3.1.1.2. Beta Air and Skin Dose Rate ................................ 6 3.1.2. Radioactive Iodine & Particulate ........................................ 7 3.2. Liquid Effluent Pathways .................................................................... 7 3.3. Assessment of Dose to Member of Public ........................................ 8 4.0. SITE METEOROLOGY ............................................................................... 8 i

Table of Contents (cont.)

APPENDIX E-1 DATA TABLES AND FIGURES ............................................................. E-1.1 Station Releases Table 1.1-1 Gaseous Effluents Summation of all Releases ........................ E-1.2 Table 1.2-1 Liquid Effluents Summation of all Releases ............................. E-1.4 Table 3.1-1 Maximum Doses Resulting from Airborne Releases ................ E-1.6 Table 3.2-1 Maximum Doses Resulting from Liquid Effluents ..................... E-1.10 Table 3.3-1 10CFR20 Compliance Assessment .......................................... E-1.12 Table 3.4-1 Maximum Doses Resulting from Airborne Releases Based On Concurrent Meteorological Data ......................................... E-1.14 ii

INTRODUCTION Braidwood Station, a two-unit PWR station, is located in Will County, Illinois, fifteen (15) miles south-southwest of Joliet, Illinois. Each reactor is designed to have a capacity of 3586.6 thermal megawatts. Units No. 1 went critical on May 29, 1987, and unit No. 2 went critical on March 8, 1988. The station has been designed to keep releases to the environment at levels below those specified in the regulations.

Liquid effluents from Braidwood Station are released to the Kankakee River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere and are calculated on the basis of analyses of grab samples of noble gases and tritium, as well as continuously collected composite samples of iodine and particulate activity sampled during the course of the year. The results of effluent analyses are summarized on a monthly basis. Airborne concentrations of noble gases, 1-131, and particulate radioactivity in offsite areas are calculated using effluent and meteorological data. Carbon-14 concentration in offsite areas is calculated based on industry-approved methodology for estimation of the amount released and meteorological data.

Environmental monitoring is conducted by sampling at indicator and control (background) locations in the vicinity of Braidwood Station to measure changes in radiation or radioactivity levels that may be attributable to station operations. If significant changes attributable to Braidwood Station are measured, these changes are correlated with effluent releases. An environmental monitoring program is conducted which also includes all potential pathways at the site. Gaseous pathways include ground plane (direct), inhalation, vegetation, meat, and milk.

Liquid pathways include potable water and freshwater fish. The critical pathway for 2010 gaseous dose was vegetation. The critical pathway for 2010 liquid dose was potable water.

3

SUMMARY

Calculations based on gaseous and liquid effluents, Kankakee River Flow and meteorological data indicate that public dose due to radioactive material attributable to Braidwood Station during the period does not exceed regulatory or Offsite Dose Calculation Manual (ODCM) limits.

The Total Effective Dose Equivalent (TEDE) due to licensed activities at Braidwood Station calculated for the maximally exposed individual for the period is 1.95E+00 mrem. The annual limit on TEDE is 100 mrem.

The assessment of radiation doses to the public is performed in accordance with the ODCM. The results of these analyses confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR1 90.

4

1.0 EFFLUENTS 1.1 Gaseous Effluents to the Atmosphere Measured concentrations of noble gases, radioiodine, and particulate radioactivity released to the atmosphere during the year, are listed in Table 1.1-1.

A total of 6.97E-01 curies of fission and activation gases were released with a maximum quarterly average release rate of 4.38E-02 pCi/sec at Unit 1 and 4.38E-02 pCi/sec at Unit 2.

A total of 6.57E-05 curies of 1-131 were released during the year with a maximum average quarterly release rate of 4.06E-06 pCi/sec for Unit 1 and 4.20E-06 pCi/sec for Unit 2.

A total of 5.40E-06 curies of beta-gamma emitters were released as airborne particulate matter with a maximum average release rate of 6.94E-07 pCi/sec at Unit 1 and 0.OOE+00 pCi/sec at Unit 2. Alpha-emitting radionuclides were below the lower limit of detection (LLD) for the year.

A total of 3.43E+02 curies of tritium were released with a maximum average quarterly release rate of 1.24E+01 pCi/sec at Unit 1 and 4.58E+00 pCi/sec at Unit 2.

A total of 8.90E+00 curies of C-14 was released with a maximum average quarterly release rate of 1.41 E-01 uCi/sec from Unit 1 and 1.41 E-01 uCi/sec from Unit 2.

1.2 Liquids Released to Kankakee River A total of 6.77E+05 liters of radioactive liquid wastes (prior to dilution) containing 2.70E-02 curies (excluding tritium, noble gases and alpha) were discharged from the station. These wastes were released at a maximum quarterly diluted average concentration of 2.30E-09 pCi/ml.

Alpha-emitting radionuclides were less than the LLD for the year. A total of 7.90E+02 curies of tritium was released from the station.

Quarterly release activities are given in Table 1.2-1.

2.0 SOLID RADIOACTIVE WASTE Solid radioactive wastes were shipped by truck to the Envirocare of Utah disposal facility; the Barnwell, South Carolina disposal facility and various waste processors. For detail, refer the Braidwood Station 2010 Radioactive 5

Effluent Release Report.

3.0 DOSE TO MAN 3.1 Gaseous Effluent Pathways Table 3.1-1 summarizes the doses resulting from releases of airborne radioactivity via the different exposure pathways.

3.1.1 Noble Gases 3.1.1.1 Gamma Dose Rates Offsite Gamma air and total body dose rates are shown in Table 3.1-1 and were calculated based on measured effluents and average meteorological data. Based on measured effluents and average meteorological data, the maximum total body dose to an individual would be 4.25E-01 mrem for the year (Table 3.1-1) with an occupancy or shielding factor of 0.7 used. The maximum total body dose based on measured effluents and concurrent meteorological data would be 5.55E-01 mrem (Table 3.4-1). The maximum gamma air dose was 1.03E-05 mrad (Table 3.1-1) based on measured effluents and average meteorological data and 1.46E-05 mrad based on concurrent meteorological date (Table 3.4-1).

3.1.1.2 Beta Air and Skin Dose Rates The range of beta particles in air is relatively small (on the order of a few meters or less); consequently, plumes of gaseous effluents may be considered "infinite" for purpose of calculating the dose from beta radiation incident on the skin. However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report2 the skin is taken to have a thickness of 7.0 mg/cm and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was 2.31 E-05 mrem based on concurrent meteorological data (Table 3.4-1).

6

The maximum offsite beta air dose for the year was 4.09E-05 mrad (Table 3.1-1) based on measured effluents and average meteorological data and 3.69E-05 mrad based on concurrent meteorological data (Table 3.4-1).

3.1.2 Radioactive Iodine & Particulate The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. 1-131 released during routine operation of the station may be made available to man resulting in a dose to the thyroid. C-14 is also included in this category. C-14 exhibits a capacity to concentrate in bone. C-14 is released in gaseous form and is absorbed into vegetation through photosynthesis. The principal pathways of interest for C-14 are the consumption of vegetation by humans and milk from which animals have ingested C-14 through the consumption of vegetation. With the inclusion of C-14 in plant effluent calculations, human dose in this category is primarily driven by the release of C-14 from the plant.

The hypothetical dose to the maximum exposed individual living near the station via ingestion of milk and vegetation was calculated. The source of milk and vegetation was assumed to be at the nearest site boundary with the cows pastured and vegetation grown from May through October. The maximum dose from radioactive iodine and particulate (including C-14) to any organ was 1.87E+00 mrem (child/bone) based on measured effluents and average meteorological data and 2.21 E+00 mrem based on concurrent meteorological data.

The maximum dose from radioactive iodine and particulate (including C-14) to the whole body was 4.25E-01 mrem (child) based on measured effluents and average meteorological data and 5.44E-01 mrem based on concurrent meteorological data.

3.2 Liquid Effluent Pathways The three principal pathways through the aquatic environment for potential doses to man from liquid waste are ingestion of potable water, eating aquatic foods, and exposure while on the shoreline. Not all of these pathways are significant or applicable at a given time or station but a reasonable approximation of the dose can be made by adjusting the dose formula for season of the year or type and degree of use of the aquatic environment. NRC developed equations* were used to calculate the doses to the whole body, lower GI tracts, thyroid, 7

bone and skin; specific parameters for use in the equations are given in the Exelon Offsite Dose Calculation Manual. The maximum whole body dose for the year was 2.60E-02 mrem and no organ dose exceeded 3.14E-02 mrem (Table 3.2-1 [child]).

3.3 Assessment of Dose to Member of Public During the period January to December, 2010, Braidwood Station did not exceed the following limits as shown in Table 3.1-1 and Table 3.2-1 (based on annual average meteorological data), Table 3.4-1 (based on concurrent meteorological data), and Table 3.3-1:

The RETS limits on dose or dose commitment to an individual due to radioactive materials in liquid effluents from each reactor unit (1.5 mrem to the whole body or 5 mrem to any organ during any calendar year; 3 mrem to the whole body or 10 mrem to any organ during the calendar year).

The RETS limits on air dose in noble gases released in gaseous effluents to a member of the public from each reactor unit (5 mrads for gamma radiation or 10 mrad for beta radiation during any calendar quarter; 10 mrad for gamma radiation or 20 mrad for beta radiation during a calendar year).

The RETS limits on dose to a member of the public due to iodine-131, iodine-133, tritium, and radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released from each reactor unit (7.5 mrem to any organ during any calendar quarter; 15 mrem to any organ during any calendar year).

The 10CFR20 limit on Total Effective Dose Equivalent to individual members of the public (100 mrem) during any calendar year.

4.0 SITE METEOROLOGY A summary of the site meteorological measurements taken during each calendar quarter of the year is given in Appendix E. The data are presented as cumulative joint frequency distributions of the wind direction for the 203' level and wind speed class by atmospheric stability class determined from the temperature difference between the 199' and 30' levels. Data recovery for these measurements was 99.8% during 2010.

8

Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) 9

Intentionally left blank APPENDIX E-1 DATA TABLES AND FIGURES E-1.1

Intentionally left blank Table 1.1-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2010 GAS RELEASES UNIT (Docket Number 50-456) 1 SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Est. Total II Error%

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 7.21E-02 6.46E-02 3.48E-01 3.71E-02 7.59

2. Average Release Rate jiCi/sec 9.27E-03 8.22E-03 4.38E-02 4.67E-03

3. Percent of ODCM Limit - gamma % 1.15E-05 1.04E-05 7.73E-05 6.12E-06

4. Percent of ODCM Limit - beta % 2.79E-05 2.50E-05 1.44E-04 1.45E-05 B. Iodine Releases

1. Total 1-131 Activity Ci 0.OOE+00 0.OOE+00 0.OOE+00 3.23E-05 33.20

2. Average Release Rate fiCi/sec 0.OOE+00 0.OOE+00 0.OOE+00 4.06E-06

3. Percent of ODCM Limit - gamma % 0.OOE+00 0.OOE+00 0.OOE+00 3.14E+00 C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci 5.40E-06 0.OOE+00 0.OOE+00 0.OOE+00 19.80

2. Average Release Rate PiCi/sec 6.94E-07 0.00E+00 0.OOE+00 0.OOE+00

3. Percent of ODCM Limit % 3.07E+00 0.OOE+00 0.OOE+00 0.OOE+00 D. Tritium Releases

1. Total Release Activity Ci 6.81E+01 5.37E+01 9.82E+01 3.77E+01 8.07

2. Average Release Rate pCi/sec 8.76E+00 6.83E+00 1.24E+01 4.74E+00

3. Percent of ODCM Limit % 3.07E+00 3.11E+00 3.14E+00 3.14E+00 E. Gross Alpha Releases

1. Total Release Activity Ci <LLD <LLD <LLD <LLD 19.80

2. Average Release Rate jiCi/sec 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00

3. Percent of ODCM limit 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 F. Carbon-14 Releases

1. Total Release Activity Ci 11IOE+00 I1.11 E+00 11.12E+00 11.12E0:0]

2. Average Release Rate pCi/sec 1.41E-01 1.41E-01 1.41E-01 1.41E-01 Note: LLD Values are included in Appendix A of this report.

E-1.2

Table 1.1-1 (cont.)

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2010 GAS RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total A. Fission and Activation Gas Releases

1. Total Activity Released Ci 5.31E-02 4.97E-02 3.48E-01 3.71E-02 7.59

2. Average Release Rate gCi/sec 6.83E-03 6.32E-03 4.38E-02 4.67E-03

3. Percent of ODCM Limit - gamma % 8.47E-06 7.99E-06 7.73E-05 6.12E-06

4. Percent of ODCM Limit - beta % 2.05E-05 1.92E-05 1.44E-04 1.45E-05 B. Iodine Releases

1. Total 1-131 Activity Ci 0.OOE+00 0.OOE+00 0.OOE+00 3.34E-05 33.20

2. Average Release Rate ktCi/sec 0.OOE+00 0.OOE+00 0.OOE+00 4.20E-06

3. Percent of ODCM Limit % 0.OOE+00 0.OOE+00 0.OOE+00 3.15E+00 C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 19.80

2. Average Release Rate pCi/sec 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00

3. Percent of OCDM Limit % 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 D. Tritium Releases

1. Total Release Activity Ci 1.78E+00 1.29E+01 3.64E+01 3.44E+01 8.07

2. Average Release Rate jiCi/sec 2.29E-01 11.64E+00 4.58E+00 4.33E+00

3. Percent of ODCM Limit % 3.08E+00 3.11E+00 3.14E+00 3.15E+00 E. Gross Alpha Releases

1. Total Release Activity Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 19.80

2. Average Release Rate jiCi/sec 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4-

3. Percent of ODCM Limit 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 F. Carbon-14 Releases

1. Total Release Activity Ci 1.41OE+00 1.11E+00 1.412E+00 1.412E-0:0

12. Average Release Rate PCi/sec 11.41 E-01 1.41 E-01 1.41 E-01 1.41 E-01 Note: LLD Values are included in Appendix A of this report.

E-1.3

Table 1.2-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2010 LIQUID RELEASES UNIT 1 (Docket Number 50-456)

SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr EstTError A. Fission and Activation Products

1. Total Activity Released Ci 1.51E-03 4.04E-03 1.70E-03 6.24E-03 2.64

2. Average Concentration Released p.Ci/ml 2.48E-10 1.OOE-09 4.27E-10 2.30E-09

3. Percent of limit % ....

B. Tritium

1. Total Activity Released Ci 3.49E+01 1.09E+02 1.16E+02 1.35E+02 5.85

2. Average Concentration Released p.Ci/ml 5.74E-06 2.71E-05 2.92E-05 4.97E-05

3. % of Limit (1E-2 ipCi/ml) % 5.74E-02 2.71E-01 2.92E-01 4.97E-01 C. Dissolved Noble Gases

1. Total Activity Released Ci 0.OOE+00 [0.OOE+00 0.OOE+00 5.16E-06 2.64

2. Average Concentration Released pCi/ml 0.00E+00 O.OOE+00 0.OOE+00 1.90E-12

3. % of Limit (2E-4 pjCi/ml) % 0.OOE+00 0.OOE+00 0.OOE+00 9.51 E-07 D. Gross Alpha

1. Total Activity Released Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 14.70 E. Volume of Releases i1. Volume of Liquid Waste to Discharge I liters I 9.43E+04 11.50E+05 I2.23E+05 I 2.10E+0NI

2. Volume of Dilution Water liters 6.08E+09 4.02E+09 3.98E+09 2.71 E+09 Note: LLD Values are included in Appendix A of this report.

Note: % Limit Values are included in Appendix B of this report.

This limit is equal to 10 times the concentration values in Appendix B, Table 2, Column 2 to 10CFR20.1001-20.2402.

E-1.4

Table 1.2-1 (cont.)

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2010 LIQUID RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Est. Total I I II I IError % I A. Fission and Activation Products

1. Total Activity Released Ci 1.51 E-03 4.04E-03 1.70E-03 6.24E-03 2.64

2. Average Concentration Released _iCi/ml 2.48E-10 1.OOE-09 4.27E-10 2.30E-09

3. Percent of Limit % ....

B. Tritium

1. Total Activity Released Ci 3.49E+01 1.09E+02 1.16E+02 [1.35E+02 5.85

2. Average Concentration Released _ iCi/mI 5.74E-06 2.71E-05 2.92E-05 I 4.97E-05

3. % of Limit (1 E-3 p.Ci/ml) % 5.74E-02 2.71E-01 2.92E-01 I 4.97E-01 C. Dissolved Noble Gases

1. Total Activity Released Ci 0.OOE+00 0.OOE+00 0.OOE+00 5.16E-06 2.64

2. Average Concentration Released pCi/ml 0.OOE+00 0.OOE+00 0.OOE+00 1.90E-12

3. % of Limit (2E-4 pCi/ml) % 0.OOE+00 0.OOE+00 0.OOE+00 9.51 E-07 D. Gross Alpha I1.Total Activity Released Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 14.70 E. Volume of Releases

1. Volume of Liquid Waste to Discharge liters 9.43E+04 1.50E+05 2.23E+05 12.1OE05

2. Volume of Dilution Water liters 6.08E+09 4.02E+09 3.98E+09 2.71E+09 Note: LLD Values are included in Appendix A of this report.

Note: % Limit Values are included in Appendix B of this report.

This limit is equal to 10 times the concentration values in Appendix B, Table 2, Column 2 to 10CFR20.1001-2402.

E-1.5

Table 3.1-1 GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID ............. 1 All Gas Release Types Period Start Date .... :.01/01/2010 00:00 Period End Date ...... :.01/01/2011 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... :.Historical Unit .................... 1 Receptor ............... 5 Composite Crit. Receptor - IP Distance (meters) .... :.0.0 Compass Point .......... 0.0 MAXIMUM PERIOD DOSE TO LIMIT (Any Organ)

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD BONE Qrtr->End CHILD BONE 9.35E-0 1 31-day 2.25E-01 4.15E+02 3.OOE-01 3.12E+02 Year->End CHILD BONE 9.35E-0 1 Quarter 5.63E+00 1.66E+01 7.50E+00 1.25E+01 9.35E-0 1 Annual 1.13E+01 8.31E+00 1.50E+01 6.23E+00 Critical Pathway .......... 2 Vegetation (VEG)

Major Contributors ........ 0.0% or greater to total Nuclide Percentage H-3 0.OOE+00 C-14 1.OOE+02 1-131 2. 66E-03 1-132 6.69E-06 1-133 1.68E-06 ND-147 2.80E-06

==MAXIMUM PERIOD DOSE TO LIMIT (Tot Body))---------------------

Dose Age Dose Limit Admin Admin % T. Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit TBODY 2.25E-01 Strt->End CHILD TBODY 2.25E-01 31-day 1. 50E-01 1 . 50E+02 2. OOE-01 1. 12E+02 Qrtr->End CHILD Quarter 5.25E+00 4.28E+00 7. 50E+00 2 . 99E+00 TBODY 2.25E-01 Year->End CHILD Annual 1.05E+01 2.14E+00 1.50E+01 1. 50E+00 Critical Pathway ........ 2 Vegetation (VEG)

Major Contributors ...... 0.0% or greater to total Nuclide Percentage H-3 1.67E+01 C-14 8.33E+01 1-131 6.41E-03 1-132 2.75E-05 1-133 3.66E-06 ND-147 1.07E-05 E-1.6

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID ............. 1 All Gas Release Types Period Start Date .... :.01/01/2010 00:00 Period End Date ...... :.01/01/2011 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... :.Historical Unit .................... 1 Receptor ................ 4 Composite Crit. Receptor - NG Distance (meters) .... :.0.0 Compass Point .......... 0.0

=== MAXIMUM PERIOD NG DOSE TO LIMIT (Gamma)

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Gamma 5.26E-06 31-day 1.50E-01 3.51E-03 2.OOE-01 2.63E-03 Qrtr->End Gamma 5.26E-06 Quarter 3.75E+00 1.40E-04 5.OOE+00 1.05E-04 Year->End Gamma 5.26E-06 Annual 7.50E+00 7.02E-05 1.OOE+01 5.26E-05 Major Contributors ...... :.0.0% or greater to total Nuclide Percentage AR-41 1.30E+01 KR-85M 1.91E-01 XE-133M 4.91E-01 XE-131M 0.OOE+00 XE-135 1.03E+01 XE-133 7.60E+01 MAXIMUM PERIOD NG DOS E TO LIMIT (Beta))

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Beta 2.11E-05 31-day 3.OOE-01 7.05E-03 4.OOE-01 5.29E-03 Qrtr->End Beta 2.11E-05 Quarter 7.50E+00 2.82E-04 1.OOE+01 2.11E-04 Year->End Beta 2.11E-05 Annual 1.50E+01 1.41E-04 2.OOE+01 1.06E-04 Major Contributors ...... 0.0% or greater tc total Nuclide Percentage AR-41 1 . 86E+00 KR-85M 1.24E-01 XE-133M 9.02E-01 XE-131M 0. OOE+00 XE-135 5. 35E+00 XE-133 9. 18E+01 E-1.7

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID ............. 1 All Gas Release Types Period Start Date .... .. 01/01/2010 00:00 Period End Date ...... .. 01/01/2011 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... : Historical Unit .................... 2 Receptor ............... 5 Composite Crit. Receptor - IP Distance (meters) .... :.0.0 Compass Point ......... : 0.0 MAXIMUM PERIOD DOSE TO LIMIT (Any Organ)

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD BONE 9.36E-0 1 31-day 2.25E-01 4.16E+02 3.OOE-01 3.12E+02 Qrtr->End CHILD BONE 9.36E-0 1 Quarter 5.63E+00 1.66E+01 7.50E+00 1.25E+01 Year->End CHILD BONE 9.36E-0 1 Annual 1.13E+01 8.32E+00 1.50E+01 6.24E+00 Critical Pathway .......... 2 Vegetation (VEG)

Major Contributors ...... .. 0.0% or greater to total Nuclide Percentage H-3 0.OOE+00 C-14 1.OOE+02 1-131 2.76E-03 1-132 2.04E-05 1-133 1.31E-05 BA-139 2.43E-07

=== MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 2.OOE-0 1 31-day 1.50E-01 1.33E+02 2.OOE-01 9.98E+01 Qrtr->End CHILD TBODY 2.OOE-0 1 Quarter 5.25E+00 3.80E+00 7.50E+00 2.66E+00 Year->End CHILD TBODY 2.OOE-0 1 Annual 1.05E+01 1.90E+00 1.50E+01 1.33E+00 Critical Pathway ........ 2 Vegetation (VEG)

Major Contributors ...... 0.0% or greater to total Nuclide Percentage H-3 6.26E+00 C-14 9.37E+01 1-131 7.46E-03 1-132 9.47E-05 1-133 3.22E-05 BA-139 1.13E-06 E-1.8

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID ............. 1 All Gas Release Types Period Start Date .... :.01/01/2010 00:00 Period End Date ...... :.01/01/2011 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... :.Historical Unit .................... 2 Receptor ................ 4 Composite Crit. Receptor - NG Distance (meters) .... :.0.0 Compass Point .......... 0.0 MAXIMUM PERIOD NG DOSE TO LIMIT (Gamma)

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Gamma 4.99E-06 Qrtr->End Gamma 4.99E-06 31-day 1.50E-01 3.33E-03 2.OOE-01 2. 50E-03 Year->End Gamma 4.99E-06 Quarter 3.75E+00 1.33E-04 5 . OOE+00 9.99E-05 Annual 7.50E+00 6.66E-05 1.OOE+01 4.99E-05 Major Contributors ...... :.0.0% or gireater to total Nuclide Percentage AR-41 1.37E+01 KR-85M 2.01E-01 XE-133M 5.18E-01 KR-88 0.OOE+00 XE-131M 0.OOE+00 XE-135 1.09E+01 XE-133 7.47E+01

=== MAXIMUM PERIOD NG DOSE TO LIMIT (Beta))---------

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Beta Qrtr->End Beta 1.98E-05 31-day 3.OOE-01 6. 61E-03 4 . OOE-01 4. 96E-03 1.98E-05 Quarter 7.50E+00 2 . 64E-04 1. OOE+01 1. 98E-04 Year->End Beta 1.98E-05 Annual 1.50E+01 1.32E-04 2. OOE+01 9. 92E-05 Major Contributors .... 0.0% or greater to total Nuclide Percentage AR-41 1.99E+00 KR-85M 1.32E-01 XE-133M 9.62E-01 KR-88 0.OOE+00 XE-131M 0.OOE+00 XE-135 5.71E+00 XE-133 9.12E+01 E-1.9

Table 3.2-1 LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID............... 1 All Liquid Release Types Period Start Date ....... 01/01/2010 00:00 Period End Date ......... 01/01/2011 00:00 Period Duration (mins): 5.256E+05 Unit.....................:1 Receptor.................:0 Liquid Receptor

==MAXIMUM PERIOD DOSE TO LIMIT (Any Organ)---------------------

Dose Age Dose Limit Admin Admin % T. Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT GILLI 1.57E-02 31-day 1.50E-01 1. 05E+01 2. OOE-01 7. 84E+00 Qrtr->End ADULT GILLI 1.57E-02 Quarter 3 . 75E+00 4.18E-01 5. OOE+00 3. 14E-01 Year->End ADULT GILLI 1.57E-02 Annual 7. 50E+00 2.09E-01 1.OOE+01 1.57E-01 Critical Pathway ....... 0 Potable Water (PWtr)

Major Contributors ..... 0.0% or greater to total Nuclide Percentage H-3 7.08E+01 CR-51 7.20E-03 MN-54 5.46E-01 FE-59 6.31E-02 CO-58 1.19E+00 CO-60 3.83E+00 ZR-95 1.25E-03 NB-95 1.87E+01 TE-125M 4.47E+00 TE-132 1.11E-01 1-132 5.18E-06 CS-134 5.41E-02 CS-137 7.78E-02

=== MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY Qrtr->End CHILD TBODY 1.30E-0 2 31-day 4.50E-02 2.90E+01 6.OOE-02 2.17E+01 Year->End CHILD TBODY 1.30E-0 2 Quarter 1.13E+00 1.16E+00 1.50E+00 8.70E-01 1.30E-0 2 Annual 2.25E+00 5.80E-01 3.OOE+00 4.35E-01 Critical Pathway .......... 0 Potable Water (PWtr)

Major Contributors ...... :.0.0% or greater to total Nuclide Percentage H-3 9.73E+01 CR-51 3.82E-05 MN-54 4.41E-02 FE-59 9.96E-03 CO-58 1.79E-01 E-I.10

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID .............. : 1 All Liquid Release Types Period Start Date ..... : 01/01/2010 00:00 Period End Date ....... : 01/01/2011 00:00 Period Duration (mins): 5.256E+05 Major Contributors ...... : 0.0% or greater to total Nuclide Percentage CO-60 6. 14E-01 ZR-95 5.24E-07 NB-95 2 . 20E-03 TE-125M 2. 52E-01 TE-132 3. 08E-03 1-132 1.55E-05 CS-134 6. 68E-01 CS-137 6. 74E-01 E-1.11

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID............... 1 All Liquid Release Types Period Start Date ....... 01/01/2010 00:00 Period End Date ......... 01/01/2011 00:00 Period Duration (mins): 5.256E+05 Unit..................... 2 Receptor................. 0 Liquid Receptor

==MAXIMUM PERIOD DOSE TO LIMIT (Any Organ)---------------------

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT GILLI 1.57E-02 31-day 1.50E-01 1.05E+01 2.OOE-01 7.84E+00 Qrtr->End ADULT GILLI 1.57E-02 Quarter 3.75E+00 4.18E-01 5.OOE+00 3. 14E-01 Year->End ADULT GILLI 1.57E-02 Annual 7.50E+00 2.09E-01 1.OOE+01 1.57E-01 Critical Pathway ........ 0 Potable Water (PWtr)

Major Contributors ...... 0.0% or greater to total Nuclide Percentage H-3 7.08E+01 CR-51 7.20E-03 MN-54 5.46E-01 FE-59 6.31E-02 CO-58 1.19E+00 CO-60 3.83E+00 ZR-95 1.25E-03 NB-95 1.87E+01 TE-125M 4.47E+00 TE-132 1.l1E-01 1-132 5.18E-06 CS-134 5.41E-02 CS-137 7.78E-02 MAXIMUM PERIOD DOSE TO LIMIT (Tot Body))

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 1.30E-0 2 31-day 4.50E-02 2.90E+01 6.OOE-02 2.17E+01 Qrtr->End CHILD TBODY 1.30E-0 2 Quarter 1.13E+00 1.16E+00 1.50E+00 8.70E-01 Year->End CHILD TBODY 1.30E-0 2 Annual 2.25E+00 5.80E-01 3.OOE+00 4.35E-01 Critical Pathway .......... 0 Potable Water (PWtr)

Major Contributors ...... :.0.0% or greater to total Nuclide Percentage H-3 9. 73E+01 CR-51 3.82E-05 MN-54 4 .41E-02 FE-59 9.96E-03 CO-58 1.79E-01 E-1.12

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... :.01/01/2010 00:00 Period End Date ....... :.01/01/2011 00:00 Period Duration (mins): 5.256E+05 Major Contributors ...... : 0.0% or greater to total Nuclide Percentage CO-60 6.14E-01 ZR-95 5.24E-07 NB-95 2.20E-03 TE-125M 2.52E-01 TE-132 3.08E-03 1-132 1.55E-05 CS-134 6.68E-01 CS-137 6.74E-01 E-1.13

Table 3.3-1 Braidwood Nuclear Station Unit 1 10 CFR 20 Compliance Assessment Period of Assessment: 1/1/2010 through 12/31/2010 Calculated 4/24/11 10 CFR 20.1301(A)(1) COMPLIANCE Total Effective Dose Equivalent (TEDE) mrem/year 9.75E-01 10 CFR 20.1301(a)(1) limit mrem/year 100.00

% of limit 0.975 COMPLIANCE

SUMMARY

1 st Qtr 2 n Qtr 3rd Qtr 4th Qtr Total TEDE (mrem) 2.36E-01 2.44E-01 2.43E-01 2.51E-01 9.75E-01 E-1.14

Table 3.3-1 (cont.)

Braidwood Nuclear Station Unit 2 10 CFR 20 Compliance Assessment Period of Assessment: 1/1/2010 through 12/31/2010 Calculated 4/24/11 10 CFR 20.1301(A)(1) COMPLIANCE Total Effective Dose Equivalent (TEDE) mrem/year 9.75E-01 10 CFR 20.1301(a)(1) limit mrem/year 100.00

% of limit 0.975 COMPLIANCE

SUMMARY

is'tQtr 2 nd Qtr 3 rd Qtr 4 th Qtr Total TEDE (mrem) 2.36E-01 2.44E-01 2.43E-01 2.51E-01 9.75E-01 E-1.15

Table 3.4-1 Doses Resulting from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from Braidwood Station airborne releases.

Unit 1:

Dose Maximum Value Sector Affected gamma air (1) 7.110 x 10.6 mrad North beta air (2) 1.850 x 10.5 mrad North whole body (3) 2.719 x 101 mrem North skin (4) 1.120 x 105 mrem North organ (5)(child-bone) 1.104 x 10+0 mrem North Unit 1 Compliance Status 10 CFR 50 Appendix I Yearly Objective % of Appendix I gamma air 10.0 mrad 0.00 beta air 20.0 mrad 0.00 whole body 5.0 mrem 5.44 skin 15.0 mrem 0.00 organ 15.0 mrem 7.36 Unit 2:

Dose Maximum Value Sector Affected gamma air (1) 7.510 x 10. mrad North beta air (2) 1.840 x 10'5 mrad North whole body (3) 2.835 x 101 mrem North skin (4) 1.190 x 105 mrem North organ (5)(child-bone) 1.105 x 10÷0 mrem North Unit 2 Compliance Status 10 CFR 50 Appendix I Yearly Objective % of Appendix I gamma air 10.0 mrad 0.00 beta air 20.0 mrad 0.00 whole body 5.0 mrem 5.67 skin 15.0 mrem 0.00 organ 15.0 mrem 7.37 E-1.16

Intentionally left blank APPENDIX F METEOROLOGICAL

Intentionally left blank Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 0 2 NNE 0 1 2 4 NE 0 2 4 6 ENE 0 4 1 5 E 0 2 0 2 ESE 0 3 2 5 SE 0 0 1 1 SSE 0 0 0 0 S 0 0 5 10 SSW 0 0 0 1 SW 0 0 1 1 WSW 0 2 6 8 W 0 14 10 25 WNW 0 8 19 27 NW 1 13 24 40 NNW 0 2 3 5 Variable 0 0 0 0 Total 2 52 78 10 0 0 142 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 3 0 N 0 3 0 3 2 NNE 2 7 0 0 2 NE 0 2 ENE 2 2 0 0 4 E 1 4 1 0 6 ESE 0 3 1 0 4 SE 0 2 2 0 4 SSE 0 0 .0 0 0 S 0 0 0 1 1 SSW 0 2 0 0 2 SW 0 0 2 0 2 WSW 0 6 2 0 8 W 0 5 6 1 12 WNW 0 5 2 0 7 NW 0 2 8 0 10 NNW 0 2 6 0 8 Variable 0 0 0 0 0 Total 3 39 34 4 0 0 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 4 1 0 6 NNE 0 2 4 1 7 NE 2 4 3 0 9 ENE 0 1 0 0 1 E 1 3 0 0 4 ESE 2 2 1 0 5 SE 0 1 0 0 1 SSE 0 0 1 0 1 S 0 0 2 1 3 SSW 0 5 1 2 8 SW 0 1 0 2 3 WSW 0 2 3 0 5 W 0 5 4 2 11 WNW 0 4 3 0 7 NW 0 5 6 0 11 NNW 1 1 3 1 6 Variable 0 0 0 0 0 Total 7 40 32 9 0 0 88 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 .19-24 > 24 Total N 4 21 10 0 0 0 35 NNE 2 16 46 39 0 0 103 NE 7 23 48 10 0 0 88 ENE 9 26 2 0 0 0 37 E 10 31 14 0 0 0 55 ESE 1 15 2 0 0 0 18 SE 1 25 15 0 0 0 41 SSE 1 12 8 3 0 0 24 S 3 3 7 6 1 0 20 SSW 2 5 5 13 1 0 26 SW 1 14 27 6 0 0 48 WSW 4 19 20 8 0 0 51 W 5 74 34 12 0 0 125 WNW 8 54 25 0 0 0 87 NW 7 43 23 4 0 0 77 NNW 5 29 24 3 0 0 61 Variable 2 0 0 0 0 0 2 Total 72 410 310 104 0 898 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 27 2 39 NNE 4 33 23 60 NE 10 24 18 54 ENE 9 27 2 38 E 20 17 0 37 ESE 8 28 9 45 SE 2 11 27 41 SSE 2 14 8 24 S 2 2 17 22 SSW 3 0 12 24 SW 7 13 3 23 WSW 7 18 5 30 W 17 50 0 67 WNW 22 53 3 79 NW 20 39 2 61 NNW 15 24 2 41 Variable 1 0 0 1 Total 159 380 133 14 0 0 686 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 N 6 6 0 0 0 NNE 2 2 0 0 0 NE 3 3 1 0 0 ENE 11 12 1 0 0 E 19 20 6 0 0 ESE 3 9 5 0 0 SE 1 6 0 0 0 SSE 0 0 1 0 0 S 0 1 SSW 0 0 1 0 1 SW 2 1 0 0 3 WSW 6 22 0 0 28 W 24 35 0 0 59 WNW 23 8 0 0 31 NW 23 0 0 0 23 NNW 9 2 0 0 11 Variable 0 0 0 0 0 Total 132 82 1 0 0 0 215 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 NNE 0 0 0 0 0 NE 2 2 0 0 0 ENE 2 2 0 0 0 E 2 2 0 0 0 ESE 1 1 0 0 0 SE 0 0 0 0 0 SSE 0 0 0 0 0 S 0 0 0 0 0 SSW 0 0 0 0 0 SW 0 0 4 0 0 WSW 1 5 W 4 1 0 0 5 WNW 13 0 0 0 13 NW 5 0 0 0 5 NNW 1 0 0 0 1 Variable 0 0 0 0 0 Total 31 5 0 0 0 0 36 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 2 NNE 0 0 3 NE 0 0 7 ENE 0 0 4 E 0 0 3 ESE 0 0 6 SE 0 0 0 SSE 0 0 0 S 0 0 10 SSW 0 0 1 SW 0 0 1 WSW 0 0 7 W 0 9 8 5 0 0 22 WNW 0 1 17 12 0 0 30 NW 0 2 13 24 3 0 42 NNW 0 1 2 1 0 0 4 Variable 0 0 0 0 0 0 0 Total 1 19 56 57 9 0 142 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 2 NNE 0 3 8 NE 0 I 2 ENE 1 1 3 E 2 2 7 ESE 0 3 4 SE 0 0 4 SSE 0 0 0 S 0 0 1 SSW 0 1 2 SW 0 0 1 WSW 0 2 5 W 0 6 11 WNW 0 i NW 0 12 NNW 0 0 7 Variable 0 0 0 Total 3 22 27 24 3 1 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stabil ity classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 5 NNE 0 0 5 NE 0 0 8 ENE 0 0 2 E 0 0 4 ESE 0 0 4 SE 0 0 1 SSE 0 0 2 S 0 0 4 SSW 0 0 7 SW 0 0 3 WSW 0 0 3 W 0 0 12 WNW 0 0 8 NW 1 3 3 5 0 0 12 NNW 2 2 2 1 1 0 8 Variable 0 0 0 0 0 0 0 Total 3 30 25 20 10 0 88 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 9 16 5 0 31 NNE 2 8 16 39 31 103 NE 2 7 17 36 17 79 ENE 3 10 14 4 0 31 E 2 11 22 7 0 42 ESE 1 2 16 5 0 24 SE 0 5 22 9 4 40 SSE 1 1 12 8 2 25 S 1 4 2 4 5 19 SSW 1 3 0 8 12 25 SW 2 6 23 10 4 45 WSW 2 16 11 14 2 45 W 4 22 43 27 14 114 WNW 3 15 41 40 6 105 NW 1 19 26 29 11 86 NNW 0 13 24 17 2 56 Variable 2 0 0 0 0 2 Total 28 151 305 262 110 16 872 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 27 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 9 28 3 0 0 43 NNE 1 5 27 27 1 0 61 NE 2 5 20 19 5 1 52 ENE 0 14 20 3 0 0 37 E 2 5 30 3 0 0 40 ESE 0 3 17 16 5 2 43 SE 1 5 8 15 13 0 42 SSE 0 1 9 8 5 0 23 S 0 3 6 13 7 0 29 SSW 4 1 0 9 11 1 26 SW 1 11 6 5 0 0 23 WSW 2 8 2 13 0 0 25 W 1 6 28 7 0 0 42 WNW 0 6 46 27 2 0 81 NW 0 12 40 15 2 0 69 NNW 1 17 19 13 0 0 50 Variable 0 1 0 0 0 0 1 Total 18 112 306 196 51 4 687 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 11 1 15 NNE 3 0 6 NE 3 0 5 ENE 1 0 11 E 6 3 11 ESE 5 4 13 SE 4 3 8 SSE 5 1 8 S 0 1 1 SSW 0 1 1 SW 0 0 1 WSW 1 1 3 W 21 11 36 WNW 30 20 56 NW 14 3 24 NNW 17 2 21 Variable 0 0 0 Total 12 36 121 51 0 0 220 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Braidwood Generating Station Period of Record: January - March 2010 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 6 NNE 0 5 NE 0 3 ENE 0 1 E 0 4 ESE 0 0 SE 0 0 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 0 W 0 5 WNW 0 6 NW 0 5 NNW 0 1 Variable 0 0 Total 0 11 13 12 0 0 36 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1

Intentionally left blank Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 5 1 0 0 13 NNE 0 11 18 0 0 0 29 NE 1 13 13 0 0 0 27 ENE 1 11 0 0 0 0 12 E 2 12 3 0 0 0 17 ESE 2 9 5 0 0 0 16 SE 0 8 9 0 0 0 17 SSE 1 10 2 1 0 0 14 S 0 11 6 3 3 0 23 SSW 0 7 8 2 6 0 23 SW 0 3 8 11 0 0 22 WSW 1 3 14 5 0 0 23 W 2 5 23 4 0 0 34 WNW 1 15 22 0 0 0 38 NW 0 8 11 0 0 0 19 NNW 0 16 4 3 0 0 23 Variable 0 1 0 0 0 0 1 Total 12 149 151 30 9 0 351 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Spieed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 2 NNE 1 3 5 1 0 10 NE 2 3 3 0 0 8 ENE 0 6 1 0 0 7 E 2 5 1 0 0 8 ESE *0 2 0 0 0 2 SE 1 1 2 0 0 4 SSE 0 9 0 0 0 9 S 2 7 0 2 3 14 SSW 1 6 4 4 5 20 SW 0 1 1 5 0 7 WSW 0 3 3 0 0 6 W 0 4 8 0 0 12 WNW 0 0 3 0 0 3 NW 0 4 1 0 0 5 NNW 0 2 2 0 0 4 Variable 1 0 0 0 0 1 Total 10 58 34 12 8 0 122 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 0 Hours of missing stability measurements in all s tability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Spe ed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 2 4 NNE 5 3 10 NE 3 5 9 ENE 7 0 11 E 5 0 8 ESE 5 3 10 SE 5 2 9 SSE 5 0 6 S 2 3 5 SSW 2 2 8 SW 0 4 8 WSW 2 2 7 W 10 3 14 WNW 2 2 4 NW 2 4 7 NNW 2 4 7 Variable 0 0 1 Total 16 59 39 13 1 0 128 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 8 6 1 0 0 17 NNE 1 26 24 5 0 0 56 NE 6 53 20 1 0 0 80 ENE 13 47 9 0 0 0 69 E 12 24 8 0 0 0 44 ESE 6 18 14 1 0 0 39 SE 3 27 17 1 0 0 48 SSE 1 19 9 3 0 0 32 S 2 10 14 6 9 0 41 SSW 1 8 17 13 6 0 45 SW 1 16 33 10 1 0 61 WSW 1 15 18 2 0 0 36 W 2 18 19 8 0 0 47 WNW 3 17 11 4 0 0 35 NW 5 9 7 0 0 0 21 NNW 3 10 16 0 0 0 29 Variable 0 0 0 0 0 0 0 Total 62 325 242 55 16 0 700 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 13 1 0 23 NNE 10 17 2 0 29 NE 15 10 1 0 26 ENE 29 22 2 0 53 E 29 25 1 0 55 ESE 13 43 8 0 64 SE 2 26 17 0 45 SSE 2 35 17 0 54 S 2 32 45 13 93 SSW 4 7 19 11 44 SW 1 15 14 1 31 WSW 8 33 8 0 49 W 6 23 3 1 33 WNW 16 16 1 0 33 NW 8 6 1 0 15 NNW 6 9 3 0 18 Variable 0 0 0 0 0 Total 160 332 143 26 4 0 665 Hours of calm in this stability class: 9 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 3 0 0 0 0 10 NNE 3 0 0 0 0 0 3 NE 0 0 0 0 0 0 0 ENE 10 0 0 0 0 0 10 E 6 0 0 0 0 0 6 ESE 11 2 0 0 0 0 13 SE 5 5 0 0 0 0 10 SSE 2 3 0 0 0 0 5 S 2 0 0 0 0 0 2 SSW 0 0 7 0 0 0 7 SW 4 0 0 0 0 0 4 WSW 5 11 0 0 0 0 16 W 10 3 0 0 0 0 13 WNW 16 1 0 0 0 0 17 NW 5 0 0 0 0 0 5 NNW 7 1 0 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 93 29 7 0 0 0 129 Hours of calm in this stability class: 18 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 34 8 0 0 0 0 42 Hours of calm in this stability class: 15 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 8 1 12 NNE 1 12 11 25 NE 5 9 12 27 ENE 11 3 0 15 E 8 6 4 19 ESE 4 6 6 19 SE 2 5 4 13 SSE 6 6 1 14 S 4 10 3 23 SSW 6 4 3 22 SW 2 6 6 22 WSW 1 6 12 23 W 3 7 14 28 WNW 6 11 20 39 NW 11 4 5 29 NNW 5 7 6 20 Variable 1 0 0 1 Total 7 79 110 108 35 12 351 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 0 0 1 NNE 0 0 3 3 2 0 8 NE 2 3 1 3 0 0 9 ENE 0 3 2 1 0 0 6 E 0 5 2 1 0 0 8 ESE 0 1 0 2 0 0 3 SE 0 1 2 1 0 0 4 SSE 0 1 7 0 0 0 8 S 2 4 3 0 1 5 15 SSW 0 3 4 6 1 4 18 SW 0 1 2 0 2 0 5 WSW 0 2 3 2 2 0 9 W 0 2 3 3 0 0 8 WNW 0 1 0 5 2 0 8 NW 0 3 0 0 1 0 4 NNW 1 4 1 1 0 0 7 Variable 1 0 0 0 0 0 1 Total 6 35 33 28 11 9 122 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 NNE 10 NE 8 ENE 11 E 7 ESE 12 SE 9 SSE 6 S 5 SSW 7 SW 7 WSW 9 W 12 WNW 5 NW 10 NNW 5 Variable 1 Total 7 39 35 27 12 8 128 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 7 5 1 0 17 NNE 1 9 16 19 6 0 51 NE 2 12 29 20 5 0 68 ENE 2 14 39 14 1 0 70 E 1 10 17 17 2 0 47 ESE 3 4 8 16 5 6 42 SE 1 3 18 17 4 0 43 SSE 1 3 13 6 5 1 29 S 0 3 11 9 11 10 44 SSW 0 1 12 13 10 12 48 SW 0 5 23 25 2 3 58 WSW 1 4 16 11 2 0 34 W 2 4 12 10 8 4 40 WNW 0 7 10 10 10 5 42 NW 0 8 6 13 1 0 28 NNW 0 2 9 13 0 0 24 Variable 0 0 0 0 0 0 0 Total 14 93 246 218 73 41 685 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 15 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 14 3 0 0 21 NNE 9 16 5 0 0 31 NE 10 20 4 0 0 35 ENE 10 34 4 0 0 48 E 10 30 12 2 0 55 ESE 3 13 31 5 0 52 SE 4 17 25 1 0 47 SSE 3 12 32 7 0 54 S 3 15 30 28 8 84 SSW 2 8 25 14 8 57 SW 9 13 19 1 0 42 WSW 5 17 5 0 0 27 W 1 26 15 1 0 44 WNW 2 23 9 0 0 35 NW 3 11 7 0 0 24 NNW 3 9 5 0 0 17 Variable 0 0 0 0 0 0 Total 9 80 278 231 59 16 673 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 12 NNE 0 0 14 NE 0 0 5 ENE 0 0 8 E 1 0 4 ESE 1 0 8 SE 0 0 6 SSE 0 0 10 S 0 0 9 SSW 0 0 4 SW 0 0 7 WSW 1 0 5 W 1 5 13 7 0 0 26 WNW 1 7 3 0 0 0 11 NW 0 3 8 1 0 0 12 NNW 1 1 4 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 7 44 67 27 2 0 147 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Braidwood Generating Station Period of Record: April - June 2010 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 7 24 18 8 0 0 57 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Intentionally left blank Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 10 1 19 NNE 9 3 0 13 NE 23 3 0 27 ENE 11 0 0 14 E 9 0 0 10 ESE 12 0 0 14 SE 11 1 0 12 SSE 17 3 0 21 S 20 28 4 52 SSW 14 21 13 51 SW 5 14 10 29 WSW 8 14 7 33 W 26 13 7 46 WNW 40 13 0 56 NW 24 14 0 46 NNW 16 14 0 32 Variable 0 0 0 1 Total 27 252 151 42 4 0 476 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 6 NNE 0 4 NE 0 7 ENE 0 6 E 0 4 ESE 0 7 SE 0 0 SSE 0 6 S 0 7 SSW 0 9 SW 0 9 WSW 0 7 W 0 5 WNW 0 8 NW 1 0 2 NNW 1 0 8 Variable 1 0 1 Total 21 52 19 4 0 0 96 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 0 0 3 NNE 1 4 1 0 6 NE 2 4 1 0 7 ENE 1 0 0 0 1 E 0 1 0 0 1 ESE 1 1 0 0 2 SE 3 7 0 0 10 SSE 1 9 0 0 10 S 1 5 9 0 15 SSW 0 4 4 3 11 SW 0 3 5 2 12 WSW 0 6 2 0 8 W 2 6 2 2 12 WNW 2 3 0 0 5 NW 1 2 3 0 6 NNW 1 4 1 0 6 Variable 0 0 0 0 0 Total 17 61 28 7 2 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all sta bility classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 9 4 0 0 0 14 NNE 2 17 6 0 0 0 25 NE 10 21 0 0 0 0 31 ENE 7 5 0 0 0 0 12 E 9 6 0 0 0 0 15 ESE 7 8 0 0 0 0 15 SE 3 24 0 0 0 0 27 SSE 5 27 1 0 0 33 S 3 21 22 2 0 48 SSW 1 7 22 6 0 41 SW 2 11 27 8 0 51 WSW 0 19 12 2 0 33 W 1 16 7 3 0 27 WNW 4 11 6 0 0 21 NW 4 20 0 0 0 24 NNW 4 11 3 0 0 18 Variable 2 0 0 0 0 2 Total 65 233 110 21 0 437 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 15 3 0 0 0 33 NNE 12 13 0 0 0 0 25 NE 26 2 0 0 0 0 28 ENE 26 10 0 0 0 0 36 E 28 5 0 0 0 0 33 ESE 23 20 0 0 0 0 43 SE 14 40 0 0 0 0 54 SSE 13 56 4 0 0 0 73 S 15 100 34 2 0 0 151 SSW 2 15 12 12 2 0 43 SW 4 23 13 1 0 0 41 WSW 6 21 3 0 0 0 30 W 21 19 2 0 0 0 42 WNW 11 17 1 0 0 0 29 NW 11 8 2 0 0 0 21 NNW 12 17 2 0 0 0 31 Variable 0 0 0 0 0 0 0 Total 239 381 76 15 2 0 713 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 20 1 0 0 0 0 21 NNE 8 2 0 0 0 0 10 NE 7 0 0 0 0 0 7 ENE 7 0 0 0 0 0 7 E 26 2 0 0 0 0 28 ESE 17 6 0 0 0 0 23 SE 11 8 0 0 0 0 19 SSE 4 4 0 0 0 0 8 S 5 0 0 0 0 0 5 SSW 9 7 0 0 0 0 16 SW 5 4 2 0 0 0 11 WSW 10 17 0 0 0 0 27 W 27 2 0 0 0 0 29 WNW 18 0 0 0 0 0 18 NW 6 1 0 0 0 0 7 NNW 5 0 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 185 54 2 0 0 0 241 Hours of calm in this stability class: 13 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability cl asses: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 2 NNE 3 3 NE 3 3 ENE 2 2 E 5 5 ESE 2 2 SE 1 1 SSE 0 0 S 0 0 SSW 0 0 SW 2 2 WSW 10 18 W 14 19 WNW 12 12 NW 5 5 NNW 4 4 Variable 0 0 Total 65 13 0 0 0 0 78 Hours of calm in this stability class: 33 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 7 5 0 18 NNE 1 7 0 0 8 NE 6 21 1 0 29 ENE 9 3 0 0 12 E 3 6 0 0 12 ESE 5 8 1 0 14 SE 5 6 0 0 11 SSE 10 12 0 0 23 S 9 23 19 4 55 SSW 4 22 8 10 48 SW 3 12 10 4 29 WSW 6 8 8 4 29 W 10 12 7 7 38 WNW 23 28 15 1 71 NW 18 16 12 0 49 NNW 8 13 6 0 29 Variable 0 0 0 0 1 Total 16 125 204 92 30 9 476 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 7 NNE 0 0 5 NE 1 0 5 ENE 2 0 7 E 1 0 6 ESE 1 0 5 SE 1 0 2 SSE 0 0 4 S 0 0 6 SSW 0 0 10 SW 0 1 8 WSW 0 0 6 W 1 1 4 WNW 2 4 1 3 0 0 10 NW 0 3 3 1 1 0 8 NNW 1 0 0 0 0 2 Variable 1 0 0 0 0 0 1 Total 13 39 26 13 3 2 96 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 0 0 2 NNE 1 2 2 0 0 0 5 NE 1 4 2 1 0 0 8 ENE 1 1 0 0 0 0 2 E 0 1 1 0 0 0 2 ESE 0 2 0 0 0 0 2 SE 0 7 2 0 0 0 9 SSE 1 2 4 0 0 0 7 S 0 2 6 6 0 0 14 SSW 0 4 4 4 2 0 14 SW 0 2 3 4 2 2 13 WSW 0 1 5 2 0 0 8 W 1 5 2 1 1 0 10 WNW 1 1 3 1 1 1 8 NW 0 2 0 3 0 0 5 NNW 1 1 3 1 0 0 6 Variable 0 0 0 0 0 0 0 Total 7 38 38 23 6 3 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 3 17 NNE 8 3 16 NE 20 4 35 ENE 5 0 13 E 5 0 13 ESE 4 2 13 SE 12 5 28 SSE 23 2 33 S 12 19 41 SSW 11 21 55 SW 14 13 39 WSW 15 12 38 W 11 3 27 WNW 6 4 22 NW 13 5 27 NNW 9 3 18 Variable 0 0 2 Total 28 86 176 99 33 15 437 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - Septemb, er 2010 Stability Class - Slightly Stable - 199Ft- 30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 8 17 3 0 0 31 NNE 0 7 13 0 0 0 20 NE 1 13 13 0 0 0 27 ENE 0 22 14 1 0 0 37 E 1 7 25 1 0 0 34 ESE 0 15 17 2 0 0 34 SE 1 6 37 5 0 0 49 SSE 0 10 30 30 0 0 70 S 1 7 36 89 9 1 143 SSW 2 8 23 30 3 12 78 SW 2 8 19 10 1 0 40 WSW 1 5 14 7 0 0 27 W 0 2 14 10 0 0 26 WNW 2 8 14 16 0 0 40 NW 0 6 12 7 0 0 25 NNW 1 6 26 3 0 0 36 Variable 0 0 0 0 0 0 0 Total 15 138 324 214 13 13 717 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 5 7 NNE 1 5 11 17 NE 1 3 5 9 ENE 0 5 4 9 E 0 3 9 16 ESE 0 2 15 25 SE 1 2 9 17 SSE 1 6 4 12 S 2 7 5 15 SSW 0 5 6 11 SW 0 11 5 19 WSW. 0 6 9 17 W 0 0 11 18 WNW 2 5 17 29 NW 2 4 20 29 NNW 0 2 1 4 Variable 0 0 0 0 Total 10 68 136 40 0 0 254 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: July - September 2010 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 2 7 0 11 NNE 1 0 1 0 2 NE 0 0 10 0 10 ENE 0 2 3 0 5 E 1 0 1 0 2 ESE 3 0 3 0 6 SE 0 3 0 0 3 SSE 1 4 0 0 5 S 0 4 0 0 4 SSW 1 2 0 0 3 SW 1 1 0 0 2 WSW 1 4 4 7 0 0 16 0 0 3 2 0 0 5 W

WNW 1 8 8 1 0 0 18 NW 1 9 2 0 0 0 12 NNW 0 7 0 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 13 46 42 10 0 0 111 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Intentionally left blank Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 NNE 2 NE 1 ENE 0 E 6 ESE 0 SE 1 SSE 2 S 0 SSW 6 SW 3 WSW 14 W 16 WNW 19 NW 16 NNW 16 Variable 0 Total 0 39 49 18 0 0 106 Hours of calm in this stability class: 0 Hours of missing wind measurements in this sta]bility class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 NNE 0 0 5 NE 0 0 3 ENE 0 0 5 E 0 0 4 ESE 0 0 2 SE 1 0 1 SSE 0 0 4 S 0 0 2 SSW 0 0 7 SW 0 0 3 WSW 0 0 15 W 0 0 7 WNW 0 0 7 NW 0 0 4 NNW 0 0 5 Variable 0 0 0 Total 1 29 27 13 5 0 75 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 NNE 0 9 NE 0 0 ENE 0 2 E 0 0 ESE 0 2 SE 0 0 SSE 0 3 S 0 4 SSW 0 12 SW 0 6 5 4 2 0 17 WSW 1 1 7 2 0 0 11 W 0 6 2 1 0 0 9 WNW 0 4 1 1 0 0 6 NW 0 5 3 0 0 0 8 NNW 0 2 3 3 0 0 8 Variable 0 0 0 0 0 0 0 Total 4 34 42 16 2 0 98 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all sta bility classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 16 28 5 56 NNE 9 6 0 16 NE 7 0 0 12 ENE 17 1 0 25 E 24 0 0 30 ESE 26 12 1 40 SE 9 20 10 41 SSE 4 35 11 50 S 1 24 9 39 SSW 10 17 14 48 SW 16 14 19 59 WSW 24 19 26 73 W 19 36 28 85 WNW 41 48 4 97 NW 16 9 0 31 NNW 17 38 7 75 Variable 0 0 0 0 Total 49 256 307 134 30 1 777 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 14 16 14 0 44 NNE 7 14 3 0 24 NE 8 4 0 0 12 ENE 15 14 1 0 30 E 4 4 0 0 8 ESE 4 3 3 0 10 SE 3 11 21 1 36 SSE 1 40 31 10 83 S 3 35 46 11 96 SSW 0 12 24 15 53 SW 0 22 16 8 46 WSW 1 20 12 0 34 W 5 22 9 4 40 WNW 7 33 14 0 54 NW 14 20 0 0 34 NNW 9 29 19 0 57 Variable 0 0 0 0 0 Total 95 299 213 49 5 0 661 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 3 11 NNE 5 3 8 NE 10 0 10 ENE 16 0 16 E 18 0 18 ESE 9 1 10 SE 6 10 16 SSE 4 13 17 S 4 10 14 SSW 2 16 27 SW 3 6 15 WSW 6 31 37 W 9 16 25 WNW 17 10 27 NW 13 5 18 NNW 6 4 10 Variable 0 0 0 Total 136 128 15 0 0 0 279 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stabil ity class: 0 Hours of missing stability measurements in all st ability cl asses: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 0 0 0 0 10 NNE 4 0 0 0 0 5 NE 4 0 0 0 0 4 ENE 10 0 0 0 0 10 E 12 0 0 0 0 12 ESE 4 0 0 0 0 5 SE 1 0 0 0 0 1 SSE 0 0 0 0 0 0 S 0 0 0 0 0 1 SSW 11 3 0 0 0 15 SW 5 0 0 0 0 6 WSW 8 17 0 0 0 0 25 W 37 2 0 0 0 0 39 WNW 36 0 0 0 0 0 36 NW 12 1 0 0 0 0 13 NNW 8 0 0 0 0 0 8 Variable 3 0 0 0 0 0 3 Total 164 26 3 0 0 0 193 Hours of calm in this stability class: 12 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 NNE 0 0 1 NE 0 0 2 ENE 0 0 0 E 0 0 6 ESE 0 0 0 SE 0 0 1 SSE 0 0 2 S 0 0 0 SSW 0 0 6 SW 0 1 3 WSW 0 0 13 W 0 0 6 5 4 0 15 WNW 0 3 7 10 0 0 20 NW 0 5 6 11 0 0 22 NNW 0 1 3 7 0 0 11 Variable 0 0 0 0 0 0 0 Total 0 12 41 43 9 1 106 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 0 Hours of missing stability measurements in all s tability classes: 2

Braidwood Generating Station PPeriod of Record: October - December 2010 Stability C lass - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 NNE 0 6 NE 0 1 ENE 0 5 E 0 5 ESE 0 1 SE 0 1 SSE 0 4 S 0 2 SSW 0 7 SW 0 3 WSW 0 0 11 W 0 1 3 4 2 0 10 WNW 0 1 4 3 0 0 8 NW 0 1 1 3 0 0 5 NNW 0 2 1 1 1 0 5 Variable 0 0 0 0 0 0 0 Total 0 13 24 25 7 75 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 1 0 7 NNE 0 1 1 0 6 NE 0 0 0 0 0 ENE 1 2 0 0 3 E 0 0 0 0 0 ESE 0 2 0 0 2 SE 0 0 0 0 0 SSE 0 0 0 0 3 S 0 0 3 0 4 SSW 0 1 6 0 13 SW 0 2 5 2 14 WSW 0 3 6 0 2 0 11 W 0 3 6 1 1 0 11 WNW 0 0 3 1 1 0 5 NW 0 3 4 3 0 0 10 NNW 0 0 2 4 3 0 9 Variable 0 0 0 0 0 0 0 Total 1 19 37 26 13 2 98 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 0 Hours of missing stability measurements in all s tability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 14 23 2 48 NNE 3 8 3 0 16 NE 4 5 1 0 11 ENE 12 11 1 0 26 E 7 16 6 0 30 ESE 5 11 19 4 41 SE 3 4 14 15 42 SSE 2 4 18 25 50 S 4 2 15 8 38 SSW 4 14 11 12 49 SW 6 15 10 13 51 WSW 5 14 23 17 65 W 13 12 17 28 74 WNW 9 35 42 24 ill NW 9 16 20 3 50 NNW 5 18 30 7 75 Variable 0 0 0 0 0 Total 20 98 199 253 158 49 777 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 10 15 21 0 0 46 NNE 1 2 10 6 0 0 19 NE 0 3 10 3 0 0 16 ENE 1 5 17 3 0 0 26 E 1 1 7 0 0 0 9 ESE 1 3 2 3 1 0 10 SE 0 5 2 11 15 0 33 SSE 0 1 17 21 22 9 70 S 0 1 18 45 24 3 91 SSW 0 2 18 33 18 10 81 SW 0 2 10 22 0 2 36 WSW 0 0 18 18 1 1 38 W 0 1 15 10 2 0 28 WNW 0 3 19 29 4 0 55 NW 0 4 14 22 0 0 40 NNW 0 11 25 25 2 0 63 Variable 0 0 0 0 0 0 0 Total 4 54 217 272 89 25 661 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 6 3 0 0 12 NNE 0 7 4 4 0 0 15 NE 0 6 6 1 0 0 13 ENE 1 8 5 0 0 0 14 E 0 2 13 5 0 0 20 ESE 0 1 5 2 0 0 8 SE 0 3 2 3 0 0 8 SSE 0 1 3 10 0 0 14 S 0 4 11 1 0 0 16 SSW 2 1 13 5 0 0 21 SW 0 5 12 16 0 0 33 WSW 0 3 3 16 0 0 22 W 0 3 8 16 0 0 27 WNW 0 2 9 9 0 0 20 NW 0 4 11 11 0 0 26 NNW 0 5 7 3 0 0 15 Variable 0 0 0 0 0 0 0 Total 3 58 118 105 0 0 284 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Braidwood Generating Station Period of Record: October - December 2010 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 7 5 19 NNE 0 2 3 0 5 NE 3 3 1 0 7 ENE 1 1 4 0 6 E 1 3 3 0 7 ESE 4 3 2 2 11 SE 1 7 1 1 10 SSE 1 4 0 1 6 S 0 4 1 0 5 SSW 3 2 0 1 6 SW 0 4 1 3 8 WSW 1 3 5 7 16 W 1 6 11 11 29 WNW 0 0 17 13 30 NW 0 2 21 5 28 NNW 2 3 6 1 12 Variable 0 0 0 0 0 Total 19 53 83 50 0 0 205 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2

Intentionally left blank APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Intentionally left blank Docket No: 50-456 50-457 BRAIDWOOD STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2010 Prepared By Teledyne Brown Engineering Environmental Services Exel nsM Nuclear Braidwood Station Braceville, IL 60407 May 2011

Intentionally left blank Table Of Contents I. Sum m ary and Conclusions .............................................................................................. 1 I1. Introduction ..................................................................................................................... 3 A. Objectives of the RG PP ................................................................................. 3 B. Im plem entation of the Objectives .................................................................... 3 C. Program Description ..................................................................................... 4 D. Characteristics of Tritium (H-3) ...................................................................... 4 Ill. Program Description ................................................................................................. 5 A. Sam ple Analysis ............................................................................................. 5 B. Data Interpretation ........................................................................................... 6 C. Background Analysis ...................................................................................... 7

1. Background Concentrations of Tritium ................................................. 7 IV. Results and Discussion ............................................................................................ 9 A. Groundwater Results ...................................................................................... 9 B. Surface W ater Results ................................................................................. 10 B. Drinking W ater W ell Survey .......................................................................... 10 C. Summary of Results - Inter-laboratory Comparison Program ...................... 10 D. Leaks, Spills, and Releases .......................................................................... 10 E. Trends ............................................................................................................... 11 F. Investigations ................................................................................................. 11 G . Actions Taken .............................................................................................. 11

Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2010 Figqures Figure A-1 Sampling Locations near the Site Boundary of the Braidwood Station, 2010 Figure A-2 Intermediate Sampling Locations of the Braidwood Station, 2010 Figure A-3 Distant Sampling Locations of the Braidwood Station, 2010 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2010.

Table B-1.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2010.

Table B-11.1 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2010.

ii

1. Summary and Conclusions In 2010, Exelon continued a comprehensive program that evaluates the impact of station operations on groundwater and surface water in the vicinity of Braidwood Station. This evaluation involved numerous station personnel and contractor support personnel. This report covers groundwater and surface water samples, collected from the environment, both on and off station property in 2010. During that time period, 815 analyses were performed on 812 samples from 199 locations.

In assessing all the data gathered for this report, it was concluded that the operation of Braidwood Station had no adverse radiological impact on the environment.

Gamma-emitting radionuclides associated with licensed plant operations were not detected at concentrations greater than their respective Lower Limits of Detection (LLDs) as specified in the Offsite Dose Calculation Manual (ODCM) in any of the groundwater samples. Gamma-emitting radionuclides in surface water were not analyzed in 2010. In the case of tritium, Exelon specified that it's laboratories achieve a lower limit of detection 10 times lower than that required by federal regulation.

Strontium-89/90 was not detected at a concentration greater than the LLD of 1.0 picoCuries per liter (pCi/L) in any of the groundwater samples tested.

Strontium-89/90 in surface water was not analyzed in 2010.

No tritium was detected in the groundwater samples at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Tritium was not detected in any surface water samples greater than 20,000 pCi/L. Low levels of tritium were detected in groundwater and surface water at concentrations greater than the LLD of 200 pCi/L in 183 of 814 analyses. The tritium concentrations ranged from 152 +/- 99 pCi/L to 3,920 +/- 444 pCi/L. The tritium that was detected in the groundwater is believed to be the result of isolated historical releases and/or background from external sources greater than 200 pCi/L.

Intentionally left blank II. Introduction The Braidwood Station, consisting of two 3587 MWt pressurized water reactors owned and operated by Exelon Corporation, is located in Will County, Illinois.

Unit No. 1 went critical on 29 May 1987. Unit No. 2 went critical on 08 March 1988. The site is located in northeastern Illinois, 15 miles south-southwest of Joliet, Illinois and 60 miles southwest of Chicago and southwest of the Kankakee River.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Environmental Inc. Midwest Labs (EIML) on samples collected in 2010.

A. Objective of the RGPP The long-term objectives of the RGPP are as follows:

1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.

2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.

3. Perform routine water sampling and radiological analysis of water from selected locations.

4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources.

B. Implementation of the Objectives The objectives identified have been implemented at Braidwood Station as discussed below:

1. Exelon identified locations to monitor and evaluate potential impacts from station operations.

2. The Braidwood Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3. Braidwood Station will continue to perform routine sampling and radiological analysis of water from selected locations.

4. Braidwood Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.

5. Assessed results to monitor for adverse trends.

6. Braidwood Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 through A-3, Appendix A.

Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods. Both groundwater and surface water are collected.

Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits.

Station personnel review and evaluate all analytical data deliverables as data are received.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through the skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-7 and/or boron-1 0 are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by Teledyne Brown Engineering (TBE) and Environmental Incorporated Midwest Laboratory (EIML) to analyze the environmental samples for radioactivity for the Braidwood Station RGPP in 2010.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of gamma emitters in groundwater and surface water.

2. Concentrations of strontium in groundwater and surface water.

3. Concentrations of tritium in groundwater and surface water.

B. Data Interpretation The radiological data collected prior to Braidwood Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Braidwood Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.

2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Exelon reports the TPU by following the result with plus or minus (+/-) the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

Gamma spectroscopy results for each type of sample were grouped as follows:

For groundwater and surface water 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

C. Background Analysis A pre-operational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Braidwood Nuclear Power Station, Commonwealth Edison Company, Annual Report 1986, May 1987.

The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.

At the upstream Kankakee River collection point, BD-25, monthly composites of weekly sample collections from all surface water locations indicated tritium concentrations were not detectable above the LLD

(<200 pCi/L). Monthly composites of weekly sample collections from all surface water locations indicate strontium-89, strontium-90, cesium-1 34 and cesium-1 37 concentrations were less than their specified LLDs.

Groundwater was collected from one off-site well on a quarterly basis.

Gamma isotopic, radiostrontium and tritium analyses were performed on all samples. Strontium-89, strontium-90, tritium and gamma emitters were below their respective LLDs.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others.

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, "Cosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, "lithogenic" tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected world wide from 1960 to 2010.

RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to and including 2010. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c. Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L.

The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion A. Groundwater Results Groundwater Samples were collected from on and off-site wells throughout the year in accordance with the station radiological groundwater protection program. All required LLDs were met. Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity (Table B-1.1, Appendix B). Tritium values ranged from the detection limit to 4,020 pCi/I. Some contamination still exists and monitoring is ongoing.

Strontium Strontium-90 was analyzed for in 8 samples and was less than the required detection limit of 1.0 pCi/liter. (Table B-1.1, Appendix B).

Gamma Emitters No gamma emitting nuclides were detected in any of the samples analyzed. (Table B-1.2, Appendix B)

B. Surface Water Results Surface Water Samples were collected from twelve surface water locations throughout the year in accordance with the station radiological groundwater protection program. All required LLDs were met.

Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity (Table B-11.1, Appendix B). Tritium values ranged from the detection limit to 366 pCi/l.

Strontium Strontium-90 was not analyzed in 2010.

Gamma Emitters Gamma emitters were not analyzed in 2010.

C. Drinking Water Well Survey Drinking water wells near Braidwood Station were sampled quarterly in 2010.

D. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the AREOR.

E. Leaks, Spills, and Releases Previously identified contaminated groundwater plumes are being addressed by the Braidwood Station tritium remediation activities.

There were no liquid leaks, spills, or releases in 2010 that affected groundwater.

F. Trends and Analyses Monitoring of remediation activities indicate that tritium concentrations in affected areas are trending down.

G. Investigations Investigation of historic spills and the groundwater contamination has resulted in groundwater remediation activities at Braidwood Station.

H. Actions Taken

1. Compensatory Actions All Circulating Water Blowdown valve vaults were coated to prevent any leakage of water from the vaults to the groundwater. A remote leakage detection system has been installed which provides continuous monitoring of the vaults. Operations procedures are in place for actions to take in the event the leak detection system alarms.

Walkdowns of the Circulating Water Blowdown pipeline and vaults were performed weekly.

2. Installation of Monitoring Wells Exelon has installed a permanent monitoring well network that ensures that ground water will be appropriately monitored around the plant and at the various remediation sites. Monitoring well locations were based on the kind of up gradient potential contamination source, ground flow direction, and source concentration. Some monitoring points are not primarily used for sampling but rather to measure ground water elevation. Water elevation is used extensively around active remediation sites to verify that ground water is still flowing toward remediation wells.

3. Actions to Recover/Reverse Plumes Vacuum Breaker 1 area: Three remediation wells have been installed in this area to remove contaminated ground water. Monitoring of this activity indicates the remediation is proceeding acceptably.

Vacuum Breaker 2 area: Two remediation wells have been installed in this area to remove contaminated ground water. These wells, which became operational in 2008, discharge to the Exelon Pond. The wells are in place to remediate a previously identified contamination plume and were not installed to remediate contamination from a new spill.

Vacuum Breakers 4, 6, & 7: Monitoring wells have been installed within and down gradient of these plumes which originated from vacuum breaker valves along the blowdown line. These sites are being remediated by monitored natural attenuation.

Exelon Pond area: The combination of groundwater sample monitoring and water level monitoring ensures that the active remedial pumping of Exelon Pond continues to capture the tritium that spilled from vacuum breakers 2 and 3 almost ten years ago. Monitoring to date has shown marked reduction in the most contaminated area and the station continues to monitor plume capture to determine whether adjustments are needed in the pumping rate.

APPENDIX A LOCATION DESIGNATION

Intentionally left blank TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2010 Station Code Sample Descriptior-'-

BL-03 Monitoring Well BL-06 Monitoring Well BL-06D Monitoring Well BL-09D Monitoring Well BL-10D Monitoring Well BL-11 Monitoring Well BL-11D Monitoring Well BL-12D Monitoring Well BL-13D Monitoring Well BL-14D Monitoring Well BL-15D Monitoring Well BL-16D Monitoring Well BL-17D Monitoring Well BL-18D Monitoring Well BL-19R Monitoring Well BL-20D Monitoring Well BL-21 Monitoring Well BL-22 Monitoring Well BL-23 Monitoring Well BL-24 Monitoring Well BL-25 Monitoring Well BL-26 Monitoring Well BL-27 Monitoring Well C-1D Monitoring Well C-2D Monitoring Well CD-1D Monitoring Well D-1D Monitoring Well D-2D Monitoring Well D-3D Monitoring Well DITCH (DS-2) Surface Water EXELON POND Surface Water F-iD Monitoring Well F-3D Monitoring Well F-4D Monitoring Well F-5D Monitoring Well F-6D Monitoring Well F-7D Monitoring Well F-8D Monitoring Well F-9D Monitoring Well FATLAN POND Surface Water G-2 Monitoring Well G-2D Monitoring Well G-3 Monitoring Well G-4S Monitoring Well G-5S Monitoring Well G-6S Monitoring Well LAKE DISCHARGE CANAL Surface Water LAKE INTAKE Surface Water MW-102R Monitoring Well MW-103 Monitoring Well A-1

TABLE A-i: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2010 Station Code Sample Description MW-105 Monitoring Well MW- 05D Monitoring Well MW-106D Monitoring Well MW-109D Monitoring Well MW-11 Monitoring Well MW-1 10 Monitoring Well MW-111DR Monitoring Well MW-112D Monitoring Well MW-113 Monitoring Well MW-113DR Monitoring Well MW-13 Monitoring Well MW-130D Monitoring Well MW-131 D Monitoring Well MW-132D Monitoring Well MW-133D Monitoring Well MW-134D Monitoring Well MW-135D Monitoring Well MW- 36D Monitoring Well MW-137D Monitoring Well MW-138D Monitoring Well MW-139D Monitoring Well MW-14 Monitoring Well MW-140D Monitoring Well MW-141D Monitoring Well MW-142D Monitoring Well MW-143D Monitoring Well MW-144D Monitoring Well MW-145D Monitoring Well MW-148D Monitoring Well MW-149D Monitoring Well MW-150 Monitoring Well MW-150D Monitoring Well MW-151D Monitoring Well MW-154 Monitoring Well MW-155 Monitoring Well MW-156 Monitoring Well MW-157D Monitoring Well MW-158D Monitoring Well MW-159D Monitoring Well MW-160D Monitoring Well MW-161D Monitoring Well MW-162D Monitoring Well MW-2 Monitoring Well MW-22 Monitoring Well MW-4 Monitoring Well MW-5 Monitoring Well MW-6 Monitoring Well MW-7 Monitoring Well MW-9 Monitoring Well A-2

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2010 Station Code Sample Description MW-BW-201BD Monitoring Well MW-BW-2011 Monitoring Well MW-BW-201S Monitoring Well MW-BW-2021 Monitoring Well MW-BW-202S Monitoring Well MW-BW-2031 Monitoring Well MW-BW-203S Monitoring Well MW-BW-2041 Monitoring Well MW-BW-2051 Monitoring Well MW-BW-2061 Monitoring Well MW-BW-2071 Monitoring Well MW-BW-208BD Monitoring Well P-2D Monitoring Well P-4D Monitoring Well P-5D Monitoring Well P-13D Monitoring Well P-14D Monitoring Well PW-001 Monitoring Well PW-002 Monitoring Well PW-003 Monitoring Well PW-004 Monitoring Well PW-005 Monitoring Well PW-006 Monitoring Well PW-007 Monitoring Well PW-008 Monitoring Well PW-009 Monitoring Well PW-006A Monitoring Well PW-006B Monitoring Well PW-006P Surface Water PW-011 Monitoring Well PW-013 Monitoring Well PW-014 Monitoring Well PW-015 Monitoring Well PW-016 Monitoring Well PW-018 Monitoring Well PW-13 Monitoring Well PW-485 Monitoring Well PW-ALLISON Monitoring Well PWN-115 Monitoring Well RW-10 Monitoring Well RW-5 Monitoring Well RW-6 Monitoring Well RW-7 Monitoring Well RW-9 Monitoring Well S-1D Monitoring Well S-2D Monitoring Well S-4D Monitoring Well S-7D Monitoring Well S-8DR Monitoring Well A-3

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2010 Station Code Sample Description SC-1D Monitoring Well SC-2D Monitoring Well SG-BW-103 Surface Water SG-BW-105 Surface Water STARK POND Surface Water STARK SPIGOT Monitoring Well SW-05 Surface Water SW-101 Surface Water SW-102 POINT C Surface Water SW-103 Surface Water SW-104 A DITCH Surface Water TB-20 Monitoring Well TB-20D Monitoring Well TB-21 Monitoring Well TB-21D Monitoring Well TB-22 Monitoring Well TB-22D Monitoring Well TB-23 Monitoring Well TB-23D Monitoring Well TB-24 Monitoring Well TB-24D Monitoring Well TB-25 Monitoring Well TB-25D Monitoring Well VB10-1 Monitoring Well VBI-1 Monitoring Well VB1-10D Monitoring Well VB11-1 Monitoring Well VB1-11D Monitoring Well VB1-12D Monitoring Well VB1-2D Monitoring Well VB1-3D Monitoring Well VB1-4D Monitoring Well VB1-5D Monitoring Well VB1-6D Monitoring Well VB1-7D Monitoring Well VB1-8D Monitoring Well VB1-9D Monitoring Well VB2-10 Monitoring Well VB2-1 OD Monitoring Well VB2-11 Monitoring Well VB2-11D Monitoring Well VB2-12 Monitoring Well VB2-12D Monitoring Well VB2-13 Monitoring Well VB2-113D Monitoring Well VB2-14 Monitoring Well VB2-114D Monitoring Well VB2-15D Monitoring Well VB2-16 Monitoring Well A-4

TABLE A-i: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2010 Station Code Sample Description VB2-16D Monitoring Well VB2-17 Monitoring Well VB2-17D Monitoring Well VB2-2D Monitoring Well VB2-5D Monitoring Well VB2-6D Monitoring Well VB2-7D Monitoring Well VB2-9 Monitoring Well VB2-10D Monitoring Well VB3-10D Monitoring Well VB3-2 Monitoring Well VB3-4D Monitoring Well VB3-7D Monitoring Well VB3-9D Monitoring Well VB4-1 Monitoring Well VB4-5D Monitoring Well VB4-6D Monitoring Well VB5-2 Monitoring Well VB6-1 Monitoring Well VB7-1 Monitoring Well VB8-2R Monitoring Well VB9-1 Monitoring Well WCFPD-1 D Monitoring Well WCFPD-2DR Monitoring Well WDFPD-1D Monitoring Well WDFPD-2DR Monitoring Well WELL D-1D Monitoring Well A-5

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0MW-13W-21061 PLANT PROPERTY LINE TREELINE FLEET'WIIO MONITORING WELL LOCATIOM MW-BVV-201S 0 GENERAL GROUNDWATER FLOW DIRECTION

... SHALLOW M.ONITORING WELL LOCATION STAFF GAUGE LOCATION SHALLOW MONIrORING POINT WELLS HAVE BEEN ABANDONED Figure A-1 Sampling Locations near the Site Boundary of Braidwood Station, 2010 A-6

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Figure A-3 Distant Sampling Locations of the Braidwood Station, 2010 A-8

APPENDIX B DATA TABLES

Intentionally left blank TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 BL-03 01/13/10

159 BL-03 02/11/10

167 BL-03 03/08/10

165 BL-03 06/09/10

173 BL-03 09/29/10

177 BL-03 12/15/10

187 BL-06 01/13/10

159 BL-06 02/11/10

166 BL-06 03/11/10

175 BL-06 04/16/10

173 BL-06 05/13/10

157 BL-06 06/10/10

178 BL-06 07/13/10

181 BL-06 07/18/10

187 BL-06 09/20/10

184 BL-06D 03/11/10

175 BL-06D 06/10/10

165 BL-06D 09/28/10

161 BL-06D 12/14/10

174 BL-09D 06/08/10

180 BL-09D 09/30/10

180 BL-09D 12/16/10

171 BL-1GD 06/08/10

172 BL-10D 09/30/10

182 BL-10D 12/16/10

167 BL-11 01/13/10

158 BL-11 02/11/10

169 BL-11 03/09/10

162 BL-11 06/08/10

177 BL-11 09/29/10 < 181 BL-11 12/15/10

188 BL-11D 06/08/10

175 BL-11D 09/30/10

181 BL-11D 12/16/10

171 BL-12D 06/08/10

177 BL-12D 09/30/10

180 BL-12D 12/16/10

171 BL-13D 06/08/10

175 BL-13D 09/30/10

170 BL-13D 12/16/10

170 BL-14D 06/10/10

172 BL-14D 09/29/10

180 BL-14D 12/16/10

168 BL-15D 06/09/10

152 BL-15D 09/30/10

166 BL-15D 12/16/10 < 192 BL-16D 06/10/10 < 164 BL-16D 09/30/10 < 169 BL-16D 12/16/10 < 191 BL-17D 06/11/10 < 176 BL-17D 10/01/10 < 166 B-1

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 BL-17D 12/16/10 < 188 BL-18D 06/11/10 < 152 BL-18D 10/01/10 < 166 BL-18D 12/13/10 < 156 BL-19R 01/13/10 < 160 BL-19R 02/11/10 < 169 BL-19R 03/09/10 < 165 BL-19R 06/08/10 < 152 BL-19R 09/29/10 < 182 BL-19R 12/15/10 < 184 BL-20D 06/11/10 < 174 BL-20D 09/30/10 < 182 BL-20D 12/16110 < 171 BL-21 01/12/10 < 164 BL-21 02/10/10 < 159 BL-21 03/10/10 < 170 BL-21 06/08/10 < 153 BL-21 09/28/10 < 158 BL-21 12/14/10 < 155 BL-22 01/12/10 < 162 BL-22 02/10/10 < 155 BL-22 03/09/10 < 167 BL-22 06/08/10 < 155 BL-22 09/28/10 < 157 BL-22 12/13/10 < 166 BL-23 02/10/10 < 159 BL-23 03/09/10 < 167 BL-23 06/08/10 < 152 BL-23 09/28/10 < 160 BL-23 12/14/10 < 157 BL-24 01/12/10 < 161 BL-24 02/10/10 < 157 BL-24 03/09/10 < 168 BL-24 06/07/10 < 156 BL-24 09/28/10 < 158 BL-24 12/14/10 < 156 BL-25 01/12/10 < 162 BL-25 02/09/10 < 169 BL-25 03/08/10 < 172 BL-25 06/07/10 < 155 BL-25 09/28/10 < 159 BL-25 12/14/10 < 156 BL-26 01/12/10 < 165 BL-26 02/09/10 < 170 BL-26 03/08/10 < 170 BL-26 06/07/10 < 153 BL-26 09/27/10 < 177 BL-26 12/13/10 < 160 BL-27 01/12/10 < 162 BL-27 02/10/10 < 162 B-2

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 BL-27 03/08/10 < 169 BL-27 06/07/10 < 155 BL-27 09/28/10 < 159 BL-27 12/14/10 < 157 C-1D 06/11/10 < 175 C-1D 09/30/10 < 157 C-1D 12/14/10 < 156 C-2D 06/11/10 < 175 C-2D 09/30/10 < 165 C-2D 12/14/10 < 163 CD-1D 06/09/10

152 CD-1D 09/30/10 < 158 CD-1D 12/16/10 < 190 D-11D 09/29/10

184 D-1D 12/14/10 < 166 D-2D 06/10/10

175 D-2D 09/27/10 < 181 D-2D 12/14/10 < 166 D-3D 06/10/10 < 173 D-3D 09/27/10 < 184 D-3D 12/21/10 < 160 F-1D 06/08/10 < 167 F-iD 10/04/10 < 168 F-iD 12/16/10 < 187 F-3D 06/09/10 435 +/- 114 F-3D 10/04/10 416 +/- 123 F-3D 12/17/10 283 +/- 112 F-4D 06/09/10 < 153 F-4D 10/04/10 < 166 F-4D 12/16/10

188 F-5D 01/13/10 575 1 128 F-5D 02/10/10 588 +/- 131 F-5D 03/11/10 640 +/- 130 F-5D 04/15/10 661 + 131 F-5D 05/12/10 636 +/- 130 F-5D 06/09/10 492 + 133 F-5D 07/12/10 562 + 138 F-5D 08/10/10 739 +/- 150 F-5D 10/04/10 568 +/- 130 F-5D 10/11/10 651 +/- 135 F-5D 11/09/10 652 +/- 135 F-5D 12/16/10 519 +/- 141 F-6D 01/13/10 < 163 F-6D 02/10/10 < 171 F-6D 03/11/10 < 160 F-6D 04/15/10 < 174 F-6D 05/12/10 < 162 F-6D 06/09/10 < 152 F-6D 07/12/10 < 185 B-3

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 F-6D 08/10/10 < 181 F-6D 10/04/10 < 169 F-6D 10/11/10 < 170 F-6D 11/09/10 < 166 F-6D 12/16/10 < 190 F-7D 06/09/10 677 + 125 F-7D 10/04/10 352 + 121 F-7D 12/16/10 322 + 130 F-8D 06/09/10 238 +/- 105 F-8D 10/04/10 290 + 114 F-8D 12/17/10 285 + 112 F-9D 01/13/10 223 + 112 F-9D 02/10/10 687 +/- 138 F-9D 03/10/10 601 +/- 130 F-9D 04/15/10 443 +/- 129 F-9D 05/12/10 792 +/- 139 F-9D 06/09/10 643 +/- 124 F-9D 07/13/10 356 +/- 129 F-9D 08/10/10 457 + 136 F-9D 10/04/10 354 + 119 F-9D 10/11/10 275 +/- 118 F-9D 11/09/10 348 +/- 122 F-9D 12/13/10 323 +/- 113 G-2 06/10/10 < 179 G-2 10/01/10 < 185 G-2D 06/10/10 < 176 G-2D 10/01/10 < 185 G-2D 12/17/10 < 159 G-5S 10/01/10 < 184 MW-102R 01/13/10 < 163 MW-102R 02/11/10 < 167 MW-102R 03/09/10 < 163 MW-102R 06/08/10

176 MW-102R 09/29/10 < 183 MW-102R 12/15/10 < 189 MW-103 03/11/10 < 178 MW-105 03/11/10 < 158 MW-105 06/09/10 < 150 MW-105 09/29/10 < 182 MW-105 12/16/10 < 190 MW-105D 06/09/10 < 166 MW-105D 09/28/10 < 158 MW-105D 09/29/10 < 181 MW-106D 06/11/10 < 172 MW-106D 09/30/10 < 180 MW-106D 12/17/10 < 155 B-4

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-109D 03/10/10

165 MW-109D 09/30/10

167 MW-109D 10/02/10

186 MW-109D 12/29/10

161 MW-1l 05/22/10 387 + 123 MW-i1 09/12/10 431 i32 1

MW-11 12/18/10 331 +/- 131 MW-l1O 03/10/10 < 175 MW-11o 06/09/10

181 MW-l1O 09/30/10

180 MW-i1o 12/15/10

165 MW-111 DR 03/09/10

160 MW-111 DR 06/10/10

170 MW-111 DR 09/28/10

179 MW-111 DR 12/15/10

192 MW-1 12D 03/09/10

160 MW-1 12D 06/10/10

172 MW-112D 07/18/10

186 MW-1 12D 08/11/10

184 MW-1 12D 09/28/10 < 179 MW-1 12D 12/14/10 < 173 MW-113 03/11/10

160 MW- 113 06/11/10

175 MW-113 09/30/10

183 MW-113 12/15/10

164 MW-1 13DR 03/11/10

159 MW-1 13DR 06/11/10

177 MW-1 13DR 09/30/10

179 MW-113DR 12/15/10

172 MW-13 01/14/10 263 +/- 120 MW-13 02/14/10

155 MW-13 03/15/10 507 +/- 123 MW-13 05/15/10 321 +/- 121 MW-13 06/19/10

166 MW-13 07/02/10

182 MW-13 08/07/10 240 +/- 119 MW-13 09/12/10 255 + 124 MW-13 10/10/10 188 +/- 115 MW-13 11/24/10 218 +/- 114 MW-13 12/29/10 295 +/- 120 MW-130D 03/10/10 < 162 MW-130D 09/29/10 186 + 112 MW-130D 12/29/10 < 159 MW-131D 03/09/10 < 162 MW- 131D 06/10/10 < 178 B-5

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-131D 09/28/10 < 183 MW-131D 12/14/10 < 166 MW-132D 03/09/10 < 160 MW-1 32D 06/10/10 < 173 MW-132D 09/28/10 < 179 MW-1 32D 12/14/10 < 165 MW-133D 03/09/10 < 166 MW-1 33D 06/10/10 < 172 MW-133D 09/30/10 < 168 MW-133D 12/17/10 < 161 MW-134D 03/09/10 827 + 142 MW-134D 06/09/10 574 + 136 MW-134D 09/30/10 461 +/- 126 MW-134D 12/17/10 < 190 MW-135D 03/09/10 < 176 MW-135D 06/09/10 < 173 MW-135D 09/29/10 < 158 MW-135D 12/15/10 < 169 MW-136D 03/09/10 < 169 MW-136D 06/08/10 <154 MW-136D 09/29/10 < 157 MW-1 36D 12/15/10 < 185 MW-137D 03/09/10 < 173 MW-137D 06/08/10 < 151 MW-137D 09/11/10 < 186 MW-138D 03/09/10 < 169 MW-138D 06/08/10 < 173 MW-138D 09/29/10 < 158 MW-138D 12/15/10 < 187 MW-139D 03/10/10 212 +/- 109 MW-139D 06/08/10 202 + 105 MW-139D 09/29/10 < 160 MW-139D 12/16/10 321 + 130 MW-14 06/19/10 307 + 122 MW-14 07/01/10 268 +/- 121 MW-140D 03/10/10 < 173 MW-140D 06/10/10 < 167 MW-140D 09/29/10 < 160 MW-140D 12/16/10 < 168 MW-141D 02/14/10 404 + 112 MW-141D 04/19/10 425 + 132 MW-141D 05/19/10 563 +/- 133 MW-141D 08/07/10 704 + 147 MW-141D 11/28/10 823 + 155 MW-142D 02/09/10 667 + 136 B-6

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-142D 05/23/10 981 + 157 MW-142D 11/28/10 1040 + 169 MW-143D 02/14/10 259 + 107 MW-143D 05/23/10 307 + 120 MW-144D 02/14/10 1920 +/- 240 MW-144D 04/22/10 2430 + 292 MW-144D 05/23/10 2440 + 295 MW-144D 11/28/10 3920 + 444 MW-145D 03/10/10 < 173 MW-145D 06/11/10 < 173 MW-145D 09/29/10 < 178 MW-145D 12/14/10 381 + 114 MW-154 02/18/10 < 151 MW-154 04/19/10 < 181 MW-154 05/25/10 < 172 MW-154 11/23/10 < 168 MW-155 02/20/10 < 171 MW-155 04/19/10 < 183 MW-155 05/25/10 < 171 MW-155 08/23/10 < 166 MW-155 11/23/10 < 165 MW-156 02/18/10 < 164 MW-156 04/19/10

183 MW-1 56 05/25/10 < 170 MW- 156 08/23/10 < 169 MW-156 11/23/10

175 MW-157D 03/10/10 < 173 MW-157D 06/11/10 < 171 MW-157D 09/29/10 < 181 MW-157D 12/14/10 < 158 MW-158D 01/13/10 < 160 MW-158D 02/10/10 < 155 MW-158D 03/10/10

158 MW-158D 04/15/10 < 169 MW-158D 05/13/10 < 161 MW-158D 06/08/10 < 152 MW-158D 07/12/10 < 179 MW-158D 08/10/10 < 169 MW- 158D 09/29/10 < 159 MW-158D 10/11/10 < 165 MW-158D 11/09/10 < 174 MW-158D 12/16/10 < 189 MW-159D 02/14/10 < 152 MW-159D 05/23/10 < 170 MW-159D 08/18/10 < 185 B-7

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-159D 11/24/10 < 162 MW-160D 02/14/10 < 151 MW-160D 05/23/10 < 168 MW-160D 08/18/10 < 175 MW-160D 11/24/10 < 173 MW-161D 06/19/10 727 + 144 MW-162D 06/19/10 545 + 132 MW-2 05/19/10 1110 + 170 MW-2 09/18/10 987 + 173 MW-2 12/18/10 1150 + 171 MW-22 05/23/10 659 + 139 MW-22 09/18/10 595 + 140 MW-22 12/18/10 475 + 139 MW-4 06/19/10 1720 + 221 MW-5 05/24/10 1260 + 182 MW-5 09/18/10 966 +/- 162 MW-5 12/30/10 818 +/- 154 MW-6 05/26/10 1830 + 232 MW-6 09/14/10 1670 +/- 218 MW-6 12/29/10 1790 + 236 MW-7 09/14/10 1340 + 194 MW-9 05/23/10 434 + 128 MW-9 09/12/10 574 + 140 MW-9 12/18/10 309 + 129 MW-BW-201BD 05/28/10 < 167 MW-BW-201BD 07/10/10 < 170 < 0.9 MW-BW-2011 02/13/10 < 169 MW-BW-2011 05/27/10 < 167 MW-BW-2011 07/10/10 217 + 113 < 0.7 MW-BW-201S 05/27/10 300 + 118 MW-BW-201S 07/11/10 179 + 111 < 0.7 MW-BW-2021 02/13/10 < 174 MW-BW-2021 05/24/10 179 + 112 MW-BW-2021 07/11/10 212 + 114 < 0.6 MW-BW-202S 05/24/10 255 + 114 MW-BW-202S 07/10/10 200 + 112 < 0.8 MW-BW-2031 02/13/10 < 171 MW-BW-2031 05/24/10 < 166 MW-BW-2031 07/11/10 < 168 < 0.8 MW-BW-203S 05/24/10 < 165 MW-BW-203S 07/11/10 < 167 < 0.9 MW-BW-2041 05/19/10 < 168 MW-BW-2041 10/22/10 < 177 MW-BW-2051 05/19/10 < 168 MW-BW-2051 12/29/10 < 175 MW-BW-2061 05/19/10 < 174 B-8

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-BW-2061 12/29/10 < 178 MW-BW-2071 05/28/10 603 +/- 134 MW-BW-2071 09/18110 492 +/- 134 MW-BW-208BD 05/26/10

167 MW-BW-208BD 07/10/10

168 < 0.8 P-13D 09/30/10 779 + 142 P-13D 10/02/10 617 + 139 P-14D 09/29/10

158 P-14D 12/16/10

190 P-2D 06/08/10 376 - 113 P-2D 09/29/10 291 - 113 P-2D 12/15/10

170 P-4D 06/08/10 1200 + 171 P-4D 09/29/10 1000 + 172 P-4D 12/13/10 1130 + 169 P-5D 06/09/10

163 P-5D 09/29/10

184 PW-003 01114/10

166 PW-003 04/16/10

176 PW-003 07/13/10

184 PW-003 10/11/10

166 PW-006 01/15/10

165 PW-006 04/16/10

173 PW-006 07/13/10

169 PW-006 10/11/10

166 PW-006 12/13/10

158 PW-006A 04/16/10

170 PW-006A 07/13/10

167 PW-006A 10/11/10

169 PW-011 01/14/10

164 PW-011 04/16/10

172 PW-011 07/13/10

189 PW-011 10/11/10

167 PW-013 01/15/10

165 PW-013 04/16/10

177 PW-013 07/13/10

181 PW-013 10/11/10

168 PW-013 12/13/10

167 PW-014 01/15/10

161 PW-015 01/14/10

163 PW-015 04/16/10

175 PW-015 07/13/10 < 189 PW-015 10/11/10

168 PW-016 01/15/10

167 PW-016 04/16/10 < 175 PW-016 07/13/10 < 187 B-9

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 PW-016 10/11/10 < 163 PW-ALLISON 10/11/10

188 PWN-115 05/13/10

173 RW-10 06/10/10

171 RW-10 09/28/10

158 RW-10 12/15/10

187 RW-5 03/10/10 337 + 117 RW-6 03/10/10 617 + 130 RW-7 06/10/10

170 RW-7 09/27/10

178 RW-7 12/14/10

165 RW-9 06/10/10

171 RW-9 09/28/10

161 RW-9 12/15/10

188 S-1D 01/13/10 605 + 129 S-1D 02/10/10 496 + 126 S-1D 03/10/10 387 + 118 S-1D 04/15/10 282 +/- 122 S-10 05/13/10 417 + 119 S-ID 06/08/10 390 +/- 115 S-1D 07/12/10 183 +/- 119 S-1D 08/10/10 278 +/- 125 S-1D 09/29/10

159 S-1D 10/11/10

168 S-iD 11/09/10

168 S-ID 12/16/10

192 S-2D 06/08/10 283 +/- 114 S-2D 09/29/10 362 + 115 S-2D 12/16/10

185 S-4D 06/08/10

165 S-4D 09/29/10

159 S-4D 12/16/10

192 S-7D 01/13/10

159 S-7D 02/10/10

171 S-7D 03/10/10

159 S-7D 04/15/10

175 S-7D 05/13/10

156 S-7D 06/08/10

166 S-7D 07/12/10

179 S-7D 08/10/10 < 181 S-7D 09/29/10 < 157 S-7D 10/11/10 < 166 S-7D 11/09/10 < 161 S-7D 12/16/10 < 191 S-8DR 01/13/10 < 165 B-10

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 S-8DR 02/10/10

168 S-8DR 03/10/10

161 S-8DR 04/15/10

175 S-8DR 05/13/10

159 S-8DR 06108/10

164 S-8DR 07/12/10

178 S-8DR 08/10/10

171 S-8DR 09/30/10

159 S-8DR 10/11/10

166 S-8DR 11/09/10

174 S-8DR 12/16/10

191 SC-1D 07/13/10

188 SC-ID 12/13/10

156 SC-2D 07/13/10

186 SC-2D 12/13/10

156 STARK-SPIGOT 10/01/10

182 TB-20 01/06/10 368 + 123 TB-20 02/09/10

174 TB-20 03/09/10

178 TB-20 04/10/10

186 TB-20 05/15/10

180 TB-20 06/08/10 255 + 121 TB-20 07/01/10

179 TB-20 08/07/10

185 TB-20 10/10/10

177 TB-20 11/24/10

165 TB-20 12/27/10

164 TB-20D 01/06/10 344 + 125 TB-20D 04/10/10

182 TB-20D 05/15/10

184 TB-20D 07/01/10 197 + 119 TB-20D 10/10/10 234 + 117 TB-21 01/06/10 321 + 124 TB-21 02/09/10

175 TB-21 03/09/10

178 TB-21 04/10/10

186 TB-21 05/15/10

185 TB-21 06/19/10 232 +/- 118 TB-21 07/01/10 191 +/- 118 TB-21 08/07/10 249 + 125 TB-21 09/12/10 < 179 TB-21 10/10/10 < 175 TB-21 11/24/10 181 + 111 TB-21 12/27/10 309 + 116 TB-21 D 01/06/10 353 +/- 127 TB-21 D 04/10/10 < 182 B-1I

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 TB-21D 05/15/10 < 172 TB-21D 07101/10 < 170 TB-21D 10/10/10 < 175 TB-22 01/08/10 272 +/- 117 TB-22 02/14/10 < 148 TB-22 03/09/10

179 TB-22 04/10/10 210 +/- 110 TB-22 05/15/10 < 172 TB-22 06/20/10 213 +/- 118 TB-22 07/01/10 199 +/- 112 TB-22 08/07/10 256 +/- 125 TB-22 09/12/10 < 180 TB-22 10/10/10 < 176 TB-22 11/24/10 < 163 TB-22D 01/08/10 < 171 TB-22D 04/12/10 < 181 TB-22D 05/15/10 < 182 TB-22D 07/01/10

169 TB-22D 10/10/10

175 TB-22D 12/29/10 < 175 TB-23 01/08/10 207 +/- 115 TB-23 02/14/10 152 + 99 TB-23 03/09/10 < 181 TB-23 04/12/10 < 184 TB-23 05/15/10 < 173 TB-23 06/20/10 < 172 TB-23 07/01/10 < 172 TB-23 08/07/10 217 +/- 125 TB-23 09/12/10 189 +/- 121 TB-23 10/10/10 207 +/- 117 TB-23 11/24/10 179 +/- 110 TB-23 12/27/10 190 +/- 112 TB-23D 01/08/10 < 168 TB-23D 04/12/10 < 183 TB-23D 05/15/10 < 171 TB-23D 07/01/10 < 168 TB-23D 10/10/10 < 174 TB-24 05/28/10 187 + 114 TB-24D 05/28/10 < 166 TB-25 05/26/10 231 +/- 113 TB-25D 05/26/10 < 170 VB10-1 01/12/10 < 161 VB10-1 02/09/10 < 171 VB10-1 03/08/10 < 170 VB10-1 06/07/10 < 152 VB10-1 09/27/10 < 175 B-12

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 VB10-1 12/13/10

160 VB1-1 01/12/10

167 VB1-1 02/09/10

171 VB1-1 03/10/10

164 VB1-1 04/20/10

192 VB1-1 06/08/10

169 VB1-1 07/17/10

170 VB1-1 09/28/10

182 VB1-1 12/18/10

162 VB1-100 09128110

181 VB1-10D 12/27/10

162 VB11-1 01/12/10

165 VB11-1 02/10/10

170 VB11-1 03/09/10

167 VB11-1 06/07/10

155 VB11-1 09/28/10

177 VB11-1 12/14/10

158 VBI-11D 09/28/10

181 VB1-11D 12/18/10

161 VB1-12D 03/09/10

164 VB1-12D 06/10/10

172 VB1-12D 09/28/10

184 VB1-12D 12/14/10

169 VBI1-D 12/27/10

160 VB1-2D 10/02/10

183 VB1-3D 09/28/10

179 VB1-3D 12/18/10

160 VB1-4D 09/29/10

184 VB.-4D 12/27/10

161 VB1-5D 09/29/10

185 VB1-5D 12/27/10 188 + 107 VB1-6D 06/10/10

173 VB1 -6D 09/27/10

183 VB1-6D 12/14/10

166 VB1-7D 06/10/10

174 VB1-7D 09/27/10

181 VB1-7D 12/14/10

168 VB1-8D 06/10/10

177 VB1-8D 09/30/10

161 VB1-8D 12/14/10 < 175 VB1-9D 03/18/10 3470 + 394 VB1-9D 08/24/10 1670 +/- 235 VB1-9D 09/30/10 1430 +/- 196 VB1-9D 10/02/10

179 VB1-9D 11/23/10 4020 +/- 457 B-13

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 U

VB13-90 12/29/10 1060 + 163 VB2-10 01/14/10 < 158 VB2-10 02/11/10 < 154 VB2-10 03/11/10 < 162 VB2-10 04/15/10 < 159 VB2-10 05/12/10 < 174 VB2-10 06/07/10 < 171 VB2-10 07/12/10 < 180 VB2-10 07/22/10 < 187 VB2-10 09/20/10 < 185 VB2-1 0D 01/14/10 < 160 VB2-100 02/11/10 < 148 VB2-1 OD 03/11/10 < 178 VB2-1 0D 04/15/10 < 159 VB2-1 0D 05/12/10 < 174 VB2-1 0D 06/07/10 < 169 VB2-1 0D 07/12/10 < 179 VB2-1 0D 07/22/10 < 179 VB2-1 0D 09/20/10 < 181 VB2-11 01/14/10 < 158 VB2-11 02/11/10 < 155 VB2-11 03/11/10 < 172 VB2-11 04/15/10 < 162 VB2-11 05/12/10 < 172 VB2-11 06/07/10 < 169 VB2-11 07/12/10 < 177 VB2-11 07/18/10 < 186 VB2-11 09/11/10 < 170 VB2-11D 01/14/10 1160 + 172 VB2-1 1D 02/11/10 979 + 152 VB2-11D 03/11/10 667 + 136 VB2-11D 04/15/10 389 + 117 VB2-11D 05/12/10 1310 + 193 VB2-11D 06/07/10 913 + 154 VB2-11D 07/12/10 192 + 119 VB2-11D 07/18/10 < 187 VB2-11D 09/11/10 Original 1750 +/- 232 VB2-11D 09/11/10 Rerun 2260 +/- 520 VB2-12 01/14/10 < 157 VB2-12 02/11/10 < 155 VB2-12 03/11/10 < 183 VB2-12 04/15/10 < 162 VB2-12 05/12/10 < 173 VB2-12 06/07/10 < 170 VB2-12 07/12/10 < 182 VB2-12 07/17/10 < 169 B-14

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 VB2-12 08/11/10

181 VB2-12 09/11/10

187 VB2-12D 01/14/10 739 + 133 VB2-12D 02/11/10 517 +/- 123 VB2-12D 03/11/10 510 + 134 VB2-12D 04/15/10 405 + 118 VB2-120 05/12/10 338 +/- 122 VB2-12D 06/07/10 332 + 121 VB2-12D 07/12/10

181 VB2-12D 07/17/10

183 VB2-120 08/11/10 291 +/- 128 VB2-12D 09/11/10

185 VB2-13 03/11/10

172 VB2-13 06/07/10

170 VB2-13 09/30/10

168 VB2-13 12/15/10

188 VB2-13D 03/11/10

171 VB2-13D 06/07/10

148 VB2-13D 09/30/10

179 VB2-133D 12/15/10

186 VB2-14 03/10/10

173 VB2-14 06/07/10

165 VB2-14 09/30/10

165 VB2-14 12/15/10

188 VB2-14D 03/10/10

170 VB2-14D 06/07/10

169 VB2-14D 09/30/10

166 VB2-14D 12/15/10

186 VB2-15D 03/10/10

168 VB2-15D 06/07/10

153 VB2-15D 09/28/10

159 VB2-15D 12/15/10

189 VB2-16 03/10/10

176 VB2-16 06/10/10

179 VB2-16 09/30/10

181 VB2-16 12/15/10

186 VB2-160 03/10/10

173 VB2-16D 06/10/10

176 VB2-16D 09/30/10

180 VB2-16D 12/15/10

188 VB2-17 03/10/10 < 160 VB2-17 06/10/10 < 152 VB2-17 09/30/10 < 178 VB2-17 12/16/10 < 170 VB2-170 03/10/10 < 160 VB2-17D 06/10/10 < 151 B-15

TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 VB2-17D 09/30/10

181 VB2-17D 12/16/10

171 VB2-2D 06/11/10

150 VB2-2D 09/27/10

180 VB2-2D 12/17/10

159 VB2-5D 01/14/10 944 + 150 VB2-5D 02/11/10 797 + 145 VB2-5D 03/09/10 720 +/- 136 VB2-5D 04/16/10 512 +/- 133 VB2-5D 05/1 2/10 521 +/- 130 VB2-5D 06/09/10 398 +/- 130 VB2-5D 07/1 2/10

179 VB2-5D 09/27/10 213 +/- 121 VB2-6D 04/16/10 987 +/- 162 VB2-6D 05/1 2/10 936 +/- 151 VB2-6D 06/11/10 682 +/- 139 VB2-6D 07/12/10 529 +/- 136 VB2-6D 09/27/10 530 +/- 137 VB2-7D 06/10/10 < 170 VB2-7D 10/01/10 < 168 VB2-9D 06/11/10 1440 +/- 218 VB2-9D 10/01/10 Original 3320 +/- 392 VB2-9D 10/01/10 Rerun 2850 +/- 338 VB2-9D 12/13/10 1740 +/- 225 VB3-1 0D 06/10/10 < 166 VB3-10D 10/01/10 < 163 VB3-10D 12/17/10 < 162 V13-2 01/13/10 < 155 VB3-2 02/10/10 < 171 VB3-2 03/09/10 < 162 VB3-2 06/09/10 < 164 VB3-2 09/29/10 < 181 VB3-2 12/14/10 < 160 V13-4D 06/09/10 373 +/- 111 VB3-4D 09/29/10 < 181 VB3-7D 06/10/10 < 166 VB3-7D 09/30/10 < 168 VB3-7D 12/17/10

156 VB3-9D 06/09/10 < 165 VB3-9D 10/01/10 < 166 VB3-9D 12/15/10 < 172 VB4-1 01/12/10 < 164 VB4-1 02/10/10 < 161 VB4-1 03/09/10 < 168 VB4-1 06/08/10

155 VB4-1 09/29/10 < 181 B-16

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 VB4-1 12/13/10 < 166 VB4-5D 03/10/10 < 162 VB4-5D 06/09/10 < 176 VB4-5D 09/28/10

180 VB4-5D 12/14/10

158 VB4-6D 03/10/10 3010 + 349 VB4-6D 06/09/10 2040 + 259 VB4-6D 09/28/10 2190 +/- 273 VB4-6D 12/14/10 1540 + 206 VB5-2 01/14/10 < 158 VB5-2 02/11/10

154 VB5-2 03/09/10

172 VB5-2 06/08/10 <154 VB5-2 09/28/10

159 VB5-2 12/15/10

166 V86-1 01/12/10

171 VB6-1 02/09/10

172 VB6-1 03/09/10

167 VB6-1 06/08/10

155 VB6-1 09/28/10

158 VB6-1 12/13/10

162 VB7-1 01/12/10

172 VB7-1 02/09/10 206 + 114 VB7-1 03/09/10

166 VB7-1 06/07/10

156 VB7-1 09/28/10 416 + 119 VB7-1 12/13/10 188 +/- 116 VB8-2R 01/12/10

170 VB8-2R 02/09/10

170 V18-2R 03/09/10

165 VB8-2R 06/07/10

154 VB8-2R 09/28/10

159 VB8-2R 12/13/10

160 VB9-1 01/12/10 < 165 VB9-1 02/09/10 < 168 VB9-1 03/08/10 < 171 VB9-1 06/07/10 < 154 VB9-1 09/27/10 < 177 VB9-1 12/13/10 < 161 B-17

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD MW-BW-201BD 07/10/10 < 12 <6 <1 <1 <3 <1 <2 <1 <2 < 120 <1 <1 < 57 < 19 MW-BW-2011 07/10/10 < 12 <8 <1 <1 <4 <1 <2 <1 <3 < 113 <1 <1 < 63 < 20 MW-BW-201S 07/11/10 < 10 < 17 <1 <1 <2 <1 <1 <1 <2 < 104 < 0.5 <1 < 48 < 15 MW-BW-2021 07/11/10 < 9 <4 <1 <1 <2 < 0.5 <1 <1 <2 < 94 < 0.5 <1 < 44 < 16 MW-BW-202S 07/10/10 < 13 <7 <1 <1 <3 <1 <2 <1 <2 < 132 <1 <1 < 60 < 13 MW-BW-2031 07/11/10 < 10 <6 <1 <1 <2 <1 <1 <1 <2 < 81 <1 <1 < 45 < 13 MW-BW-203S 07/11/10 < 13 <7 <1 <1 <3 <1 <2 <1 <2 < 117 <1 <1 < 56 < 19 MW-BW-208BD 07/10/10 < 12 <6 <1 <1 <3 <1 <2 <1 <2 < 118 <1 <1 < 65 < 18 00 I0

TABLE B-II.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2010 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA SITE DATE H-3 DITCH (DS-2) 03/10/10 < 161 DITCH (DS-2) 09/29/10 < 181 EXELON POND 03/18/10 162 +/- 106 EXELON POND 04/20/10 < 184 EXELON POND 05/18/10 225 +/- 126 EXELON POND 05/22/10 190 +/- 114 EXELON POND 06/09/10 < 174 EXELON POND 07/17/10 283 +/- 115 EXELON POND 08/25/10 366 +/- 129 EXELON POND 09/11/10 < 186 EXELON POND 11/23/10 < 179 FATLAN POND 06/09/10 < 177 LAKE DISCHARGE CANAL 05/18/10 < 161 LAKE DISCHARGE CANAL 10/10/10 < 175 PW-006P 04/16/10 < 176 PW-006P 07/13/10 < 168 PW-006P 10/11/10 < 166 PW-006P 12/13/10 < 157 STARK POND 10/01/10 < 178 SG-BW-103 05/18/10 < 183 SG-BW-105 05/18/10 < 158 SG-BW-105 10/10/10 < 173 SW-05 04/16/10 < 177 SW-05 07/13/10 < 179 SW-05 10/11/10 < 152 SW-05 12/13/10 < 170 SW-lOl 05/22/10 < 167 SW-lOl 11/23/10 < 175 SW-102 POINT C 11/23/10 < 173 SW-102 POINT C 05/22/10 < 165 SW-104 DITCH A 10/02/10 < 184 SW-104 DITCH A 05/22/10 < 159 B-19

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