Text

2009 Annual Radiological Environmental Operating Report
	ML101241149
Person / Time
Site:	Clinton
Issue date:	04/19/2010
From:	Kanavos M; Exelon Generation Co, Exelon Nuclear
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	U-603952
	Download: ML101241149 (175)
	v • d • e

ExelonT Nuclear Clinton Power Station 8401 Power Road Clinton, IL 61727 U-603952 April 19, 2010 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Clinton Power Station Facility Operating License No. NPF-62 NRC Docket No. 50-461

Subject:

Clinton Power Station 2009 Annual Radiological Environmental Operating Report In accordance with Technical Specification requirement 5.6.2, Exelon Generating Company, LLC (Exelon) is submitting the 2009 Annual Radiological Environmental Operating Report for Clinton Power Station. This report covers the period from January 1, 2009 through December 31, 2009. This report provides the results for the Radiological Environmental Monitoring Program as specified in Section 5.0 and Section 7.1 of the Offsite Dose Calculation Manual.

There are no commitments contained in this letter.

Respectfully, Mark E. Kanavos Plant Manager Clinton Power Station SIS/EET/blf Attachment cc: Regional Administrator - NRC Region III NRC Senior Resident Inspector - Clinton Power Station Office of Nuclear Facility Safety - Illinois Emergency Management Agency

ExelL~n,.

Nuclear ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT

CLINTON POWER STATION Annual Radiological Environmental Operating Report For the period January I Through December 31, 2009 Prepared By Teledyne Brown Engineering Environmental Services Exel nO.

Nuclear Clinton Power Station Clinton, IL 61727 Docket No: 50-461 April 2010

Table Of Contents I. Sum m ary and Conclusions ................................................................................................ 1 I1. Intro d u ctio n ........................................................................................................................ 3 A. O bjectives of the REM P .................................................................................... 3 B. Implem entation of the O bjectives ..................................................................... 3 I1l. Program Description ..................................................................................................... 4 A. Sam ple Collection .................... .......................................................................... 4 B. Sam ple Analysis ............................................................................................... 6 C. Data Interpretation ........................................................................................... 6 D. Program Exceptions ......................................................................................... 8 E. Program Changes ........................................................................................... 11 IV. Results and Discussion ............................................................................................. 12 A. Aquatic Environm ent ...................................................................................... 12

1. Surface W ater ........................................................................................ 12

2. Drinking W ater .................................................................................... 13

3. W ell W ater ........................................................................................... 13

4. Fish ....................................................................................................... 14

5. Sedim ent .............................................................................................. 14 B. Atm ospheric Environm ent ............................................................................... 14

1. Airborne ................................................................................................ 14

a. Air Particulates .......................................................................... 14

b. Airborne Iodine .......................................................................... 15

2. Terrestrial .............................................................................................. 16

a. M ilk ........................................................................................... 16

b. Food Products ......................................................................... . 16

c. G rass ......................................................................................... 16 C. Am bient Gam m a Radiation ............................................................................. 17 D. -Land Use Survey ............................................................................................ 18 E. Errata Data .................................................................................................... 19 F. Summary of Results - Inter-laboratory Comparison Program ........................ 20 V. References..................................................................................................................... 22

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the Clinton Power Station, 2009 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2009 Table B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection, Clinton Power Station, 2009 Figures Figure B-i: Environmental Sampling Locations Within One Mile of the Clinton Power Station, 2009 Figure B-2: Environmental Sampling Locations Between One and Two Miles from the Clinton Power Station, 2009 Figure B-3: Environmental Sampling Locations Between Two and Five Miles from the Clinton Power Station, 2009 Figure B-4: Environmental Sampling Locations Greater Than Five Miles from the Clinton Power Station, 2009 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-1.1 Concentrations of 1-131 in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-1.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

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Table C-I.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-11.1 Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-II.2 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-11.3 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-111.1 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-111.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-IV.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-V.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-VI.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-VI.2 Monthly and Yearly Mean Values of Gross Beta Concentrations (E-3 pCi/cu meter) in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-VI.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-VII.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-VIII.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-VIII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-IX.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-IX.2 Concentrations of Gamma Emitters in Grass Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table C-X.1 Quarterly TLD Results for Clinton Power Station, 2009.

Table C-X.2 Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Special Interest and Control Locations for Clinton Power Station, 2009.

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Table C-X.3 Summary of the Ambient Dosimetry Program for Clinton Power Station, 2009.

Figures Figure C-1 Mean Monthly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of CPS, 2009.

Figure C-2 Mean Quarterly Ambient Gamma Radiation Levels (TLD) in the Vicinity of CPS, 2009.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2009 Appendix E Errata Data Appendix F Annual Radiological Groundwater Protection Program Report (ARGPPR) iv

1. Summary and Conclusions This report on the Radiological Environmental Monitoring Program (REMP) conducted for the Clinton Power Station (CPS) by Exelon covers the period 1 January 2009 through 31 December 2009. During that time period, 1,580 analyses were performed on 1,465 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of CPS had no adverse radiological impact on the environment.

There were zero (0) radioactive liquid releases from CPS during 2009. Releases of gaseous radioactive materials were accurately measured in plant effluents.

There was no gaseous effluent releases that approached the limits specified in the CPS Offsite Dose Calculation Manual (ODCM). The highest calculated offsite dose received by a member of the public due to the release of gaseous effluents from Clinton Power Station was 1.05 E-03 or 0.00105 mrem.

Surface, drinking, and well water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Drinking water samples were also analyzed for concentrations of gross beta and 1-131. No fission or activation products were detected. Gross beta activities detected were consistent with those detected in previous years. No tritium activity was detected and the required lower limit of detection (LLD) was met.

Fish and shoreline sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected in fish or shoreline sediment samples.

Air particulate samples were analyzed for concentrations of gross beta and gamma emitting nuclides. Cosmogenic Be-7 was detected at levels consistent with those detected in previous years. No fission or activation products were detected.

High sensitivity 1-131 analyses were performed on weekly air samples. All required LLDs were met.

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

Concentrations of naturally occurring K-40 were consistent with those detected in previous years. No fission or activation products were found.

Food product samples were analyzed for concentrations of gross beta and

_gamma emitting nuclides. Gross beta activities detected were consistent with those detected in previous years. Concentrations of Cosmogenic Be-7 and naturally occurring K-40 were consistent with those detected in previous years.

No fission or activation products were detected.

Grass samples were analyzed for concentrations of gamma emitting nuclides.

Concentrations of Cosmogenic Be-7 and naturally occurring K-40 were consistent with those detected in previous years. No fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using thermoluminescent dosimeters. Levels detected were consistent with those observed in previous years.

II. Introduction The Clinton Power Station (CPS), consisting of one approximately 1140 MW gross electrical power output boiling water reactor is located in Harp Township, DeWitt County, Illinois. CPS is owned and operated by Exelon and became operational in 1987. Unit No. 1 went critical on February 15, 1987. The site encloses approximately 13,730 acres. This includes the 4,895 acre, man-made cooling lake and about 452 acres of property not owned by Exelon. The plant is situated on approximately 150 acres. The cooling water discharge flume - which discharges to the eastern arm of the lake - occupies an additional 130 acres.

Although the nuclear reactor, supporting equipment and associated electrical generation and distribution equipment lie in Harp Township, portions of the aforementioned 13,730 acre plot reside within Wilson, Rutledge, DeWitt, Creek, Nixon and Santa Anna Townships.

A Radiological Environmental Monitoring Program (REMP) for CPS was initiated in 1987. The preoperational period for most media covers the periods May 1980 through February 27, 1987 and was summarized in a separate report. This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Global Dosimetry on samples collected during the period January 1, 2009 through December 31, 2009.

A. Objectives 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.

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Ill. Program Description A. Sample Collection This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the CPS REMP in 2009. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-3, Appendix B. The sampling methods used by Environmental Inc. (Midwest Labs) are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, drinking water, well water, fish, and shoreline sediment. Two gallon water samples were collected monthly from continuous samplers located at three surface water locations (CL-90, CL-91 and CL-99) and one drinking water location (CL-14). A monthly grab sample was obtained from one surface water location (CL-13).

Quarterly samples were obtained from two well water locations (CL-07D and CL-12). All samples were collected in new unused plastic bottles, which were rinsed at least twice with source water prior to collection. Fish samples comprising the flesh of largemouth bass, crappie, carp, bluegill and channel catfish the species most commonly harvested from the lakes by sporting fishermen, were collected semiannually at two locations, CL-19 and CL-1 05 (control). Shoreline sediment samples composed of recently deposited substrate were collected at one location semiannually, CL-07B.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, milk, food produce and grass. Airborne iodine and particulate samples were collected and analyzed weekly at ten locations (CL-01, CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-11, CL-15, and CL-94). The control location was CL-11.

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 filters were replaced weekly and sent to the laboratory for analysis.

Milk samples were collected biweekly at one location (CL-1 16) from May through October, and monthly from November through April to coincide with the grazing season. All samples were collected in new unused plastic bottles from the bulk tank at that location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected once a month from June through September at four locations (CL-1 14, CL-115, CL-117 and CL-118). The control location was CL- 14. Various broadleaf vegetable samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

Grass samples were collected biweekly at four locations (CL-01, CL-02, CL-08 and CL- 16) from May through October. The control location was CL- 16. All samples were collected in new unused plastic bags and sent to the laboratory for analysis.

Ambient Gamma Radiation Direct radiation measurements were made using Panasonic 814 calcium sulfate (CaSO 4) thermoluminescent dosimeters (TLD). The TLD locations were placed around the CPS site as follows:

An inner ring consisting of 16 locations (CL-01, CL-05, CL-22, CL-23, CL-24, CL-34, CL-35, CL-36, CL-42 CL-43, CL-44, CL-45, CL-46, CL-47, CL-48 and CL-63). An additional three locations were installed as part of a volunteer comparison study near and within the site perimeter (CL-05MM, CL-46MM and CL-47MM).

An outer ring consisting of 16 locations (CL-51, CL-52, CL-53, CL-54, CL-55, CL-56, CL-57, CL-58, CL-60, CL-61, CL-76, CL-77, CL-78, CL-79, CL-80 and CL-81). CL-58MM was installed as part of a volunteer comparison study extending to approximately 5 miles from the site.

A special interest set consisting of seven locations (CL-37, CL-41, CL-49, CL-64, CL65, CL-74 and CL-75) representing special interest areas.

A supplemental set consisting of 14 locations (CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-15, CL-33, CL-84, CL-90, CL-91, CL-97, CL-99, and CL-114).

CL-1 1 represents the control location for all environmental TLDs.

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 CPS, if any, would be most significant;

3. On hills free from local obstructions and within sight of the vents (where practical);

4. And near the closest dwelling to the HVAC and VG stacks in the prevailing downwind direction.

Two TLDs - each composed of two CaSO4 thermoluminescent phosphors enclosed in plastic - were placed at each location in a vented PVC conduit located approximately three feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.

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 CPS REMP in 2009. 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 drinking water and air particulates.

2. Concentrations of gamma emitters in surface, drinking and well water, air particulates, milk, fish, grass, sediment and vegetables.

3. Concentrations of tritium in surface, drinking and well water.

4. Concentrations of 1-131 in air, milk, vegetables and drinking water.

5. Ambient gamma radiation levels at various on-site and off-site environs.

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

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 CPS detection capabilities for environmental sample analysis.

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 resulting in a negative number. A minimum detectable concentration (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 water and well water 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-1 34, Cs-1 37, Ba-140, La-140, and Ce-144 were reported.

For fish, sediment and milk, 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137, Ba-140, La-140, and Ce-144 were reported.

For drinking water, grass and vegetation 15 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, La-140, and Ce-144 were reported.

For grass 15 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, La-140, and Ce-144 were reported.

For air particulate 11 nuclides, Be-7, K-40, Co-60, Nb-95, Zr-95, Ru-103, Ru-106, Cs-134, Cs-137, Ce-141 and Ce-144, 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 The exceptions described below are those that are considered 'deviations' from the Radiological Environmental Monitoring Program as required by the Station's ODCM. By definition, 'deviations' are permitted as delineated within NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants", October 1978, and within Radiological Assessment Branch Technical Position, Revision 1, November 1979, which states.... "Deviations are permitted from the required sampling schedule if specimens are unobtainable due to hazardous conditions, seasonal unavailability, malfunction of automatic sampling equipment and other legitimate reasons".... The below section addresses the reporting requirements found within Section 7.1 of the Station's ODCM.

January 21, 2009, AR # 00869781 Non-ODCM Composite Water Sampler CL-99 was found not sampling due to the frozen condition of the Creek from the low level of the Creek and with recent frigid below zero temperatures.

February 25, 2009, AR # 00885267 ODCM Water Compositor CL-14 was out of service due to the recent 138/12 KV power outages on 02/21/09. The cumulative time of potable water flow interruption from the compositor was approximately 3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months 11 minutes. Clinton has missed approximately less than 2% of representative samples for the month of February 2009.

February 25, 2009, AR # 00885313 Environmental Air sampler CL-2 was found with the pump running but with no suction. The sample volume could not be determined.

The vendor worked on the regulator and the pump was back in service with the required flow at 0913 hours0.0106 days 0.254 hours 0.00151 weeks 3.473965e-4 months . Because the sample volume could not be determined, the data will not be included in the report.

February 25, 2009, AR # 00885338 Non-ODCM Environmental Air Sampler CL-6 was found not running during the performance of the weekly ODCM Iodine and Particulate Air Sampling surveillance due to the recent 138/12 KV power outage and a power outage for the firing range. The vendor found the flow through the sampler was 110 hours0.00127 days 0.0306 hours 1.818783e-4 weeks 4.1855e-5 months .

July 28, 2009, AR # 00954998 Low timers readings were noted by the vendor on Environmental Air Samplers CL-01 (7.5 hr lost), CL-02 (7.2 hrs lost), CL-03 (7.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months lost), CL-04 (5.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months lost), CL-06 (5.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months lost) and CL-15 (2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months lost). These low timer readings were caused by a power outage on 7/28/09.

August 18, 2009 AR # 00954592 ODCM Drinking water Compositor CL-14 was secured for approximately 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months due to the recent power outage on 7/28/2009. This resulted in about 1.4% loss of composite sampling, which is normally collected over a period of one month.

August 27, 2009, AR # 00959095 Both dosimeters from TLD CL-58 were found missing during the monthly verification of ODCM TLDs. Spare dosimeters were installed on 08/29/09 resulting in an average of 13.5 +

0.7 for the rest of the monitoring period. Due to the abbreviated monitoring period, these results were not included in the report.

The TLD CL-78 container that houses the Environmental Area TLDs was found tampered with, as only one, not both, TLD was present. Although a spare dosimeter was installed on 08/29/09, those values (13.8, 13.8, 14.9) are not included in this report due to the partial reading of 26 days of exposure. Therefore the values of 22.1 24.5, 22.8 with an average of 23.1 +/- 0.7 from the original un-tampered dosimeter are being reported.

September 10, 2009, AR # 00963332 The sample collector could not get enough monthly vegetation sample for lettuce and swiss chard and substituted the required weight with corn leaves for CL-1 15.

September 30, 2009, AR # 00975502 The sample collector could not get enough monthly vegetation sample for lettuce and Swiss chard and substituted the required weight with other edible plants for CL-114, CL-115 and CL-118.

September 30, 2009 AR # 1059978 The September spike in Gross Beta in AP as seen in Figure C-1, page C-26 could be attributed to an atmospheric radon inversion where radon is trapped near the ground for longer periods of time.

The radon attaches to dust particles which embed upon the particulate filter. The longer lived beta emitting Pb-210 daughter with a 22 year half-life would remain on the filter, resulting in the higher activity.

October 28, 2009 - December 30, 2009, AR # 1059845 ODCM Surface Water Station CL-90 had two (2) false positive 1-131 results. Although the data was reported in Appendix C on page C-1, because of the inaccuracy of the value, this data in not included within Appendix A Summary Table as part of the sample count or the summary average. This false positive was documented on both the Teledyne Brown Engineering Observation Report 10-01 and the Clinton Power Station's Corrective Action Program on AR # 1059845 December 01, 2009, AR # 01000133 ODCM CL-14 Compositor was turned off in order to fix a leak found behind the sink in the janitor closet on the first floor of the old service building. The CL-14 water Compositor was out of service for approximately 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months .

December 19, 2009, AR # 01008042 ODCM Water Compositor CL-14 was secured on 12/19/09@04:30 due to the 138/12 KV power outage. The Compositor was restored and was back in service on 12/19/09@18:28. The CL-14 Water Compositor was out of service for approximately 14 hours1.62037e-4 days 0.00389 hours 2.314815e-5 weeks 5.327e-6 months .

Program exceptions were reviewed to understand the causes of the exception and to return to ODCM sample compliance before the next sampling frequency period.

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

E. Program Changes Although there were no changes to the program in 2009, during a 2008 annual NRC ODCM REMP inspection, there was an enhancement. An Inspector observed the orientation of an environmental area TLD and as an enhancement, suggested that if relocated approximately sixty (60) feet closer towards the Station, would serve better as a direct line of sight in a cleared opening, unobstructed from tree branches and leaves.

Over the twenty (20) plus years of Unit Operation, the surrounding environment consisting of trees and their branches have grown, thus challenging the guidance ANSI N545-1975, which requires TLDs should be moved as far as possible from large or dense objects that may cause directional anomalies or otherwise perturb the radiation field. Although historical reviews were performed that resulted in no anomalous data relative to the radiation field, as part of our extent of condition, all environmental TLDs were evaluated as to locations and their respective orientations with the following determination:

Completed:

" A review of the results from adjacent Environmental Area TLD data sectors revealed no significant patterns or variances.

" An extent of condition review examined all Environmental Area TLD locations and their respective orientations and identified three (3) additional locations as candidates for additional monitoring.

" Clinton Power Station has installed four (4) TLDs in close proximity to the original TLDs: CL-05MM, CL-46MM, CL-47MM and CL-58MM.

These Environmental Area TLDs located within the same meteorological sector near the four (4) locations, were measured and studied for comparison (Table C-X.1).

o TLDs CL-05MM, CL-47MM and CL-58MM showed a slight increase for the first three quarters of 2009, averaging 0.4, 0.8 and 0.6 mRem, respectively, higher than the originally installed location. The fourth quarter 2009 showed less exposure than the originally installed locations.

o TLD CL-46MM showed a slight increase for all four quarters of 2009, averaging 3.4 mRem higher than the originally installed location.

Clinton Power Station will continue this comparison study throughout 2010.

Because the TLD results from this study are not part of the ODCM REMP averages, the results are for comparison purposes only.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken hourly, from a continuous compositor at three locations (CL-90, CL-91 and CL-99) on a monthly schedule and grab samples were taken monthly from one station (CL-13). The following analyses were performed.

Iodine-131 Monthly samples from location CL-90 were analyzed for 1-131 activity (Table C-1.1, Appendix C). No 1-131 was found and the required LLD was met.

Tritium Monthly samples from all locations were composited quarterly and analyzed for tritium activity (Table C-1.2, Appendix C). The required LLD was met.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-1.3, Appendix C). Naturally occurring K-40 was found in one of 12 samples at location CL-13, four of 12 samples at location CL-90, two of 12 samples at location CL-91 and two of 12 samples at location CL-99. No other nuclides were detected and all required LLDs were met.

2. Drinking Water Monthly samples were collected from a continuous compositor at one location (CL-14). The following analyses were performed:

Gross Beta Monthly samples were analyzed for concentrations of gross beta (Tables C-I1.1, Appendix C). Gross beta was found in two of 12 samples. The values ranged from 2.4 to 7.7 pCi/l. Concentrations detected were consistent with those detected in previous years.

Tritium Monthly samples were composited quarterly and analyzed for tritium activity (Table C-11.2, Appendix C). The required LLD was met.

Gamma Spectrometry Monthly samples were analyzed for gamma emitting nuclides (Table C-11.3, Appendix C). Naturally occurring K-40 was found in three samples at location CL-14. No other nuclides were detected and all required LLDs were met.

3. Well Water Quarterly grab samples were collected at two locations (CL-7D and CL-12, consisting of CL-12R [a raw water sample from this well]

and CL-1 2T [same well water, but after treatment and available for consumption]). The following analyses were performed:

Tritium Samples from all locations were analyzed for tritium activity (Table C-I11.1, Appendix C). The required LLD was met.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-111.2, Appendix C). Naturally occurring K-40 was found in one of four samples for locations CL-7D, CL-12R and CL-12T. No other nuclides were detected and all required LLDs were met.

4. Fish Fish samples comprised of carp, largemouth bass, bluegill, crappie and channel catfish were collected at two locations (CL-19 and CL-1 05) semiannually. The following analysis was performed:

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

Naturally occurring K-40 was found at both stations. No fission or activation products were found. No other nuclides were detected and the required LLDs were met.

5. Shoreline Sediment Aquatic shoreline sediment samples were collected at CL-07B semiannually. The following analysis was performed:

Gamma Spectrometry Shoreline sediment samples were analyzed for gamma emitting nuclides (Table C-V.1, Appendix C). Naturally occurring K-40 was detected in both samples. No fission or activation products were found. No other nuclides were detected and the required LLDs were met.

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from 10 locations on a weekly basis. The 10 locations were separated into three groups: Group I represents locations within one mile of the CPS site boundary (CL-02, CL-03, CL-04, CL-06, CL-15, and CL-94). Group II represents the locations at an intermediate distance within one to five miles of CPS (CL-01, CL-07, and CL-08), and Group III represents the control location greater than five miles from CPS (CL-1 1). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-VI.1 and C-VI.2 and Figure C-1, 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 CPS. The results from the On-Site locations (Group I) ranged from 5 to 41 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3 . The results from the Intermediate Distance location (Group II) ranged from 6 to 40 E-3 pCi/m 3 with a mean of 19 E-3 pCi/m 3 . The results from the Control locations (Group III) ranged from 7 to 41 E-3 pCi/m 3 with a mean of 19 E-3 pCi/m 3. Comparison of the 2009 air particulate data with previous years data indicate no effects from the operation of CPS (Figure C-5, Appendix C). In addition, a comparison of the weekly mean values for 2009 indicate no notable differences among the three groups.

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

Naturally occurring isotope Be-7 due to cosmic ray activity was detected in 39 samples. Naturally occurring K-40 was detected in four samples. No other nuclides were detected and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from 10 locations (CL-01, CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-11, CL-15 and CL-94) and analyzed weekly for 1-131 (Table C-VII.l, Appendix C). All results were less than the MDC and the required LLD was met.

2. Terrestrial

a. Milk Samples were collected from CL-1 16 biweekly May through October and monthly November through April, to coincide with the grazing season. The following analyses were performed:

Iodine-131 Milk samples were analyzed for concentrations of 1-131 (Table C-VIII.1, Appendix C). The required LLD was met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides (Table C-VIII.2, Appendix C).

Naturally occurring K-40 activity was found in all samples.

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

b. Food Products Broadleaf vegetation samples and substitutes as noted in exceptions were collected from four locations (CL-1 14, CL-115, CL-117 and CL-118) monthly June through September, to coincide with the harvest season. The following analyses were performed:

Gamma Spectrometry Each food product sample, cabbage, swiss chard, lettuce, and substitutions as noted earlier were analyzed for concentrations of gamma emitting nuclides (Table C-IX.1, Appendix C).

Naturally occurring Be-7 due to cosmic ray activity was detected in 46 of 48 samples. Naturally occurring K-40 activity was found in all samples. No other nuclides were detected and all required LLDs were met.

c. Grass Samples were collected from four locations (CL-01, CL-02, CL-08, and CL-1 16) biweekly May through October. The following analyses were performed:

Gamma Spectrometry Each grass sample was analyzed for concentrations of gamma emitting nuclides (Table C-IX.2, Appendix C).

Naturally occurring Be-7 due to cosmic ray activity was detected in all 52 samples. Naturally occurring K-40 activity was found in all 52 samples. No other nuclides were detected and all required LLDs were met.

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Panasonic 814 (CaSO 4 ) thermoluminescent dosimeters. Fifty-four TLD locations were established around the site. Results of TLD measurements are listed in Tables C-X.1 to C-X.3, Appendix C.

A total of 216 TLD measurements were made in 2009. The average dose from the inner ring was 18.7 mR/quarter. The average dose from the outer ring was 18.9 mR/quarter. The average dose from the special interest group was 18.6 mR/quarter. The average dose from the supplemental group was 18.0 mR/quarter. The juarterly measurements ranged from 17.7 to 20.6 mR/quarter. For the 3r quarter, one of the dosimeters for TLD station CL-78 was found to be missing during the vendor monthly verification of ODCM TLDs. The dosimeter was replaced on 08/29/09 with a spare. The dosimeter had readings of 13.8, 13.8 and 14.9, resulting in an average result of 14.2 mRem for the rest of the monitoring period. The other dosimeter for station CL-78 had readings of 22.1, 24.5 and 22.8 mRem, resulting in an average result of 23.1 mRem for the entire 3 rd quarter reporting period. The 23.1 mRem was the data reported in the TLD table.

The inner ring and outer ring measurements compared well to the Control Station, CL-11, which ranged from 16.2 mR/quarter to 19.1 mR/quarter with an average measurement of 17.9 mR/quarter. A comparison of the Inner Ring and Outer Ring data to the Control Location data indicate that the ambient gamma radiation levels from all the locations were comparable. The historical ambient gamma radiation data from the control location were plotted along with similar data from the Inner and Outer Ring Locations (Figure C-2, Appendix C).

At the end of 2009, the data comparison between the original and newly installed TLDs showed comparable results.

D. Land Use Survey A Land Use Survey conducted during the July through October 2009 growing season around the Clinton Power Station (CPS) was performed by Environmental Inc. (Midwest Labs) for Exelon to comply with Clinton's Offsite Dose Calculation Manual, section 5.2. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 538 ft 2 in each of the sixteen 22 1/2 degree sectors around the site. The distance and direction of all locations from the CPS Station HVAC vent stack were positioned using Global Positioning System (GPS) technology. There were no changes required to the CPS REMP, as a result of this survey. The results of this survey are summarized below.

Distance in Miles from the CPS Station HVAC Vent Stack Sector Residence Garden Milk Farm Miles Miles Miles 1 N 0.9 0.9 0.9 2 NNE 1.0 3.0 2.9 3 NE 1.3 4.2 >5.0 4 ENE 1.7 2.6 >5.0 5E 1.0 1.0 1.0 6 ESE 3.2 3.2 >5.0 7 SE 2.4 2.4 >5.0 8 SSE 1.7 2.7 >5.0 9S 3.0 4.0 4.1 10SSW 2.9 >5.0 >5.0 11 SW 0.7 >5.0 >5.0 12 WSW 1.6 2.3 3.3 13W 1.2 2.0 >5.0 14 WNW 1.6 >5.0 >5.0 15 NW 1.6 2.4 >5.0 16 NNW 1.2 1.2 1.2 E. Errata Data During an Exelon Nuclear Oversight audit, the following items were discovered to be in error:

1. The 2008 AREOR text and Appendix A referred to ground water.

Ground water was changed to well water in the 2008 text and Appendix A Summary Table.

2. The 2008 text also listed the incorrect number and list of gamma nuclides for surface water and well water and for the drinking water, grass and vegetation. Grass was also listed twice, with a different number of nuclides on each

3. Appendix B listed methods procedures rather than sample collection procedures.

Pages containing the corrected information for 2008 are attached in Appendix E.

F. Summary of Results - Inter-Laboratory Comparison Program The primary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices for 19 analytes (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 TBE's result 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 Generationr 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, 17 out of 18 analytes met the specified acceptance criteria. One sample did not meet the specified acceptance criteria for the following reason:

1. Teledyne Brown Engineering's Analytics June 2009 Zn-65 in AP result of 137 pCi/L was higher than the known value of 101 pCi/L, resulting in a found to known ratio of 1.36. NCR 09-23 was initiated to investigate this failure. The failure appears to be a result of a slightly high bias on Detector 7. A recount on Detector 17 resulted in a Zn-65 result of 101 pCi/L. The detector has been tagged out-of-service until a recalibration can be performed. Detector 7 is not used for client samples.

For the secondary laboratory, Environmental, Inc., 11 out of 14 analytes met the specified acceptance criteria. Four samples did not meet the specified acceptance criteria for the following reasons:

1. Environmental Inc.'s ERA April 2009 Cs-1 37 in water result of 147.7 pCi/L exceeded the lower control limit of 151.0 pCi/L. All gamma emitters showed a low bias. A large plastic burr found on the base of the Marinelli kept the beaker from sitting directly on the detector. Recounting in a different beaker gave an acceptable result of 155.33 +/- 14.55 pCi/L.

2. Environmental Inc.'s ERA April 2009 H-3 in water result of 22819 pCi/L exceeded the upper control limit of 22300 pCi/L. A recount of the original vials averaged 23,009 pCi/L. Reanalysis results were acceptable at 19,170 pCi/L. No cause could be found for the failure.

3. Environmental Inc.'s MAPEP January 2009 Sr-90 in AP result of 0.93 exceeded the upper control limit of 0.83. Reanalysis results were acceptable at 0.54 +/- 0.12 Bq/filter. No cause could be found for the failure.

4. Environmental Inc.'s MAPEP July 2009 Sr-90 in soil result of 310.5 Bq/kg exceeded the lower control limit of 319 Bq/kg. Reanalysis results were acceptable at 363.3 Bq/kg. Incomplete separation of strontium from calcium could result in a higher recovery percentage and consequently lower reported activity.

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

V. References

1. American National Standards Institute, Inc., "Performance, Testing and Procedural Specifications for Thermoluminescent Dosimetry," ANSI N545-1975.

2. Code of Federal Regulations, Title 10, Part 20 (Nuclear Regulatory Commission).

3. CPS 2008 Annual Radioactive Effluent Release Report.

4. "Environmental Radioactivity," M. Eisenbud, 1987 (E187).

5. "Natural Radon Exposure in the United States," Donald T. Oakley, U.S.

Environmental Protection Agency. ORP/SID 72-1, June 1972.

6. Federal Radiation Council Report No. 1, "Background Material for the Development of Radiation Protection Standards," May 13, 1960.

7. International Commission on Radiation Protection, Publication 2, "Report of Committee II on Permissible Dose for Internal Radiation," (1959) with 1962 Supplement issued in ICRP Publication 6; Publication 9, "Recommendations on Radiation Exposure," (1965); ICRP Publication 7 (1965), amplifying specific recommendations of Publication 26 (1977).

8. International Commission on Radiation Protection, Publication No. 39 (1984), "Principles of Limiting Exposure to the Public to Natural Sources of Radiation".

9. "Radioactivity in the Environment: Sources, Distribution and Surveillance,"

Ronald L. Kathren, 1984.

10. National Council on Radiation Protection and Measurements, Report No.

22, "Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air and Water for Occupational Exposure," (Published as National Bureau of Standards Handbook 69, issued June 1959, superseding Handbook 52).

11. National Council on Radiation Protection and Measurements, Report No.

39, "Basic Radiation Protection Criteria," January 1971.

12. National Council on Radiation Protection and Measurements, Report No.

44, "Krypton-85 in the Atmosphere - Accumulation, Biological Significance, and Control Technology," July 1975.

13. National Council on Radiation Protection and Measurements, Report No.

91, "Recommendations on Limits for Exposure to Ionizing Radiation," June 1987.

14. National Council on Radiation Protection and Measurements, Report No.

93, "Ionizing Radiation Exposure of the Population of the United States,"

September 1987.

15. National Research Council, 1990, Committee on Biological Effects of Ionizing Radiation (BEIR V), Board on Radiation Effects Research on Life Sciences, "The Effects of Exposure to Low Levels of Ionizing Radiation".

16. United States Nuclear Regulatory Commission, Regulatory Guide 4.1, "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants," Revision 1, April 1975.

17. United States Nuclear Regulatory Commission, Regulatory Guide 4.13, "Performance, Testing and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications, "Revision 1, July 1977.

18. United States Nuclear Regulatory Commission, Regulatory Guide 1.109, "Calculation of Annual Dose to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR Part 50, Appendix I, "Revision 1, October 1977.

19. United States Nuclear Regulatory Commission Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program," Revision 1, November 1979.

20. United States Nuclear Regulatory Commission, Regulatory Guide 4.15, "Quality Assurance for Radiological Monitoring Programs (Norm Operations) - Effluent Streams and the Environment," Revision 1, February 1979.

21. Technical Specifications, Clinton Power Station, Unit No. 1, Docket No.

50-461, Office of Nuclear Reactor Regulation, 1986. Facility Operating License Number NPF-62.

22. Clinton Power Station, Updated Safety Analysis Report.

23. Clinton Power Station, Unit 1, Off-Site Dose Calculation Manual.

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

mmlm m m m m m- m m m m TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 1-131 10 <LLD <LLD (PCI/LITER)

H-3 16 2000 <LLD <LLD 0 GAMMA 48 BE-7 NA <LLD <LLD 0 K-40 NA 40 45 57 CL-99 CONTROL 0 (5/24) (4/24) (2/12) NORTH FORK ACCESS (23/69) (32/78) (37/78) 3.5 MILES NNE OF SITE MN-54 15 <LLD <LLD CO-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 CO-60 15 <LLD <LLD THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

- --- m - m -* -- -m- - ---*

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUMOR 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 ZN-65 30 <LLD <LLD 0 (PCI/LITER)

NB-95 15 <LLD <LLD 0 ZR-95 30 <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 CE-144 NA <LLD <LLD 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

, --* - -l - m w m - -

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 DRINKING WATER GR-B 12 4 5.0 NA 5.0 CL-14 INDICATOR 0 (PCI/LITER) (2/12) (2/12) STATION PLANT SERVICE BLDG (2.4/7.7) (2.4/7.7) ONSITE H-3 4 2000 <LLD NA 0 GAMMA 12 BE-7 NA <LLD NA 0 K-40 NA 63 NA 63 CL-14 INDICATOR 0 (3/12) (3/12) STATION PLANT SERVICE BLDG (48/86) (48/86) ONSITE MN-54 15 <LLD NA 0 CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0 CO-60 15 <LLD NA 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

mmm - -/ -

m' - - - m- -l m -. -

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 DRINKING WATER ZN-65 30 <LLD NA 0 (PCI/LITER)

NB-95 15 <LLD NA 0 ZR-95 30 <LLD NA 1-131 15 <LLD NA 0 CS-134 15 <LLD NA 0 CS-137 18 <LLD NA BA-140 60 <LLD NA 0 LA-140 15 <LLD NA 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m- m m mmm m TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 DRINKING WATER CE-144 NA <LLD NA 0 (PCI/LITER)

WELL WATER H-3 12 2000 <LLD NA 0 (PCI/LITER)

GAMMA 12 BE-7 NA <LLD NA 0 K-40 NA 54 NA 91 CL- 12R INDICATOR 0 (3/12) (1/4) DEWITT PUMP HOUSE (34/91) 1.6 MILES E OF SITE MN-54 15 <LLD NA 0 CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0 CO-60 15 <LLD NA 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

S g o. M, M o Va

-1 m - -0 s - m o TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 WELL WATER ZN-65 30 <LLD NA (PCI/LITER)

NB-95 15 <LLD NA 0 ZR-95 30 <LLD NA 0 CS-134 15 <LLD NA 0 CS-137 18 <LLD NA 0 BA-140 60 <LLD NA 0 LA-140 15 <LLD NA 0 CE-144 NA <LLD NA 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

M-80 m m m --- - m TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 GAMMA 16 (PCI/KG WET) BE-7 NA <LLD <LLD 0 K-40 NA 3240 3125 3240 CL-19 INDICATOR (8/8) (8/8) (8/8) END OF DISCHARGE FLUME (2400/3850) (2200/3930) (2400/3850) 3.4 MILES E OF SITE MN-54 130 <LLD <LLD 0 CO-58 130 <LLD <LLD 0 FE-59 260 <LLD <LLD CO-60 130 <LLD <LLD 0 ZN-65 260 <LLD <LLD 0 NB-95 NA <LLD <LLD THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m mM do ton fm M m IM Mi TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 ZR-95 NA <LLD <LLD 0 (PCI/KG WET)

CS-134 130 <LLD <LLD CS-137 150 <LLD <LLD 0 00 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 CE-144 NA <LLD <LLD 0 SEDIMENT GAMMA (PCI/KG DRY) BE-7 NA <LLD NA 0 K-40 NA 7230 NA 7230 CL-07B INDICATOR 0 (2/2) (2/2) CLINTON LAKE (6980/7480) (6980/7480) 2.1 MILES SE OF SITE THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

lme 0 o-- 40M.Oil m o'-f Imamm - m TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 MN-54 NA <LLD NA 0 (PCI/KG DRY)

CO-58 NA <LLD NA 0 FE-59 NA <LLD NA 0 CO-60 NA <LLD NA 0 ZN-65 NA <LLD NA 0 NB-95 NA <LLD NA 0 ZR-95 NA <LLD NA 0 CS-134 150 <LLD NA 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m - m m m mmm* m m m - - - -

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 CS-137 180 <LLD NA 0 (PCI/KG DRY)

BA-140 NA <LLD NA 0 LA-140 NA <LLD NA 0 CE-144 NA <LLD NA 0 AIR PARTICULATE GR-B 520 10 20 19 21 CL-06 INDICATOR 0 (E-3 PCI/CU.METER) (468/468) (52/52) (52/52) CLINTON'S RECREATION AREA (5/41) (7/41) (9/38) 0.7 MILES WSW OF SITE GAMMA 40 BE-7 NA 107 93 278 CL-06 INDICATOR 0 (35/36) (4/4) (4/4) CLINTON'S RECREATION AREA (35/886) (67/141) (68/886) 0.7 MILES WSW OF SITE K-40 NA 36 <LLD 53 CL-07 INDICATOR 0 (4/36) (1/4) MASCOUTIN RECREATON AREA (25/53) 2.3 MILES SE OF SITE CO-60 NA <LLD <LLD 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

- ml m u l -u -m -n -n TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 NB-95 NA <LLD <LLD 0 (E-3 PCI/CU.METER)

ZR-95 NA <LLD <LLD 0 RU- 103 NA <LLD <LLD 0 RU-106 NA <LLD <LLD 0 CS-134 50 <LLD <LLD 0 CS-137 60 <LLD <LLD 0 CE-141 NA <LLD <LLD 0 CE-144 NA <LLD <LLD 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

=m - nmannmann ulin m -n m m-M TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: . 2009 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 IODINE GAMMA 520 (E-3 PCI/CU.METER) 1-131 70 <LLD <LLD 0 MILK 1-131 19 NA <LLD 0 (PCI/LITER)

GAMMA 19 BE-7 NA NA <LLD 0 K-40 NA NA 1243 1243 CL-116 CONTROL 0 (19/19) (19/19) PASTURE IN RURAL KENNEY (1080/1450) (1080/1450) 14 MILES WSW OF SITE MN-54 NA NA <LLD 0 CO-58 NA NA <LLD 0 FE-59 NA NA <LLD 0 CO-60 NA NA <LLD 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

mMm - -m M so M a" M w l = w W- =

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 ZN-65 NA NA <LLD 0 (PCI/LITER)

NB-95 NA NA <LLD 0 ZR-95 NA NA <LLD 0 CS-134 15 NA <LLD CS-137 18 NA <LLD 0 BA-140 60 NA <LLD LA-140 15 NA <LLD 0 CE-144 NA NA <LLD 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

- m I- ml - - - - - m I Im TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 GAMMA 48 (PCI/KG WET) BE-7 NA 832 440 924 CL-115 INDICATOR 0 (35/36) (11/12) (11/12) SITE'S SECONDARY ACCESS ROAD (156/3430) (123/1160) (156/3430) 0.7 MILES NE OF SITE K-40 NA 5417 6203 6203 CL- 114 CONTROL 0 (36/36) (12/12) (12/12) CISCO (2210/10400) (2760/10300) (2760/10300) 12.5 MILES SSEOF SITE MN-54 NA <LLD <LLD 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 THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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) 1-131 60 <LLD <LLD 0 CS-134 60 <LLD <LLD 0 CS-137 80 <LLD <LLD 0 BA-140 NA <LLD <LLD LA-140 NA <LLD <LLD 0 CE-144 NA <LLD <LLD 0 GRASS GAMMA 52 (PCI/KG WET) BE-7 NA 2684 2179 3126 CL-02 INDICATOR 0 (39/39) (13/13) (13/13) CLINTON'S MAIN ACCESS ROAD (813/8300) (1430/4590) (1800/5440) 0.7 MILES NNE OF SITE THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m - _ mm m - m m- m-m - -

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 GRASS K-40 NA 6057 6665 6665 CL-I 16 CONTROL 0 (PCI/KG WET) (39/39) (13/13) (13/13) PASTURE IN RURAL KENNEY (3110/8670) (3500/8360) (3500/8360) 14 MILES WSW OF SITE 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 THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

i== = MM- w= = = =- m TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2009 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2009 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 GRASS 1-131 60 <LLD <LLD 0 (PCI/KG WET)

CS-134 60 <LLD <LLD 0 CS-137 80 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 CE-144 NA <LLD <LLD 0 DIRECT RADIATION TLD-QUARTERLY 215 NA 18.6 17.9 20.5 CL-43 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (212/212) (4/4) (4/4)

(13.8/24.5) (16.2/19.1) (18.0/24.5) 2.8 MILES SE THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

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

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2009 Location Location Description Distance & Direction From Site A. Surface Water C1-13 Salt Creek Bridge on Rt. 10 (indicator) 3.6 miles SW CL-90 Discharge Flume (indicator) 0.4 miles SE CL-91 Parnell Boat Access (control) 6.1 miles ENE CL-99 North Fork Access (control) 3.5 miles NNE B. Drinking (Potable) Water CL-14 Station Plant Service Bldg (indicator) onsite C. Well Water CL-07D Mascoutin Recreation Area (indicator) 2.3 miles ESE CL-12T DeWitt Pump House (indicator) 1.6 miles E CL-12R DeWitt Pump House (indicator) 1.6 miles E D. Milk - bi-weekly / monthly CL-116 Dement Dairy (control) 14 miles WSW E. Air Particulates / Air Iodine CL-01 Camp Quest 1.8 miles W CL-02 Clinton's Main Access Road 0.7 miles NNE CL-03 Clinton's Secondary Access Road 0.7 miles NE CL-04 Residence Near Recreation Area 0.8 miles SW CL-06 Clinton's Recreation Area 0.7 miles WSW CL-07 Mascoutin Recreation Area 2.3 miles SE CL-08 DeWitt Cemetery 2.2 miles E CL-11 Illinois Power Substation (Control) 16 miles S CL-15 Rt. 900N Residence 0.9 miles N CL-94 Old Clinton Road 0.6 miles E F. Fish CL-19 End of Discharge Flume (indicator) 3.4 miles E CL-105 Lake Shelbyville (control) 50 miles S G. Shoreline Sediment CL-07B Clinton Lake (indicator) 2.1miles SE H. Food Products CL-114 Cisco (Control) 12.5 miles SSE CL-115 Site's Secondary Access Road 0.7 miles NE CL-117 Residence North of Site 0.9 miles N CL-1 18 Site's Main Access Road 0.7 miles NNE I. Grass CL-01 Camp Quest 1.8 miles W CL-02 Clinton's Main Access Road 0.7 miles NNE CL-08 DeWitt Cemetery 2.2 miles E CL-116 Pasture in Rural Kenney 14 miles WSW B-2

TABLE B-i: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2009 Location Location Description Distance & Direction From Site J. Environmental Dosimetry - TLD Inner Ring CL-01 1.8 miles W CL-05 0.7 miles NNE CL-22 0.6 miles NE CL-23 0.5 miles ENE CL-24 0.5 miles E CL-34 0.8 miles WNW CL-35 0.7 miles NW CL-36 0.6 miles N CL-42 2.8 miles ESE CL-43 2.8 miles SE CL-44 2.3 miles SSE CL-45 2.8 miles S CL-46 2.8 miles SSW CL-47 3.3 miles SW CL-48 2.3 miles WSW CL-63 1.3 miles NNW Outer Ring CL-51 4.4 miles NW CL-52 4.3 miles NNW CL-53 4.3 miles E CL-54 4.6 miles ESE CL-55 4.1 miles SE CL-56 4.1 miles SSE CL-57 4.6 miles S CL-58 4.3 miles SSW CL-60 4.5 miles SW CL-61 4.5 miles WSW CL-76 4.6 miles N CL-77 4.5 miles NNE CL-78 4.8 miles NE CL-79 4.5 miles ENE CL-80 4.1 miles W CL-81 4.5 miles WNW B-3

TABLE B-i: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2009 Location Location Description Distance & Direction From Site J. Environmental Dosimetry- TLD (cont.)

Special Interest CL-37 3.4 miles N CL-41 2.4 miles E CL-49 3.5 miles W CL-64 2.1 miles WNW CL-65 2.6 miles ENE CL-74 1.9 miles W CL-75 0.9 miles N Supplemental CL-02 0.7 miles NNE CL-03 0.7 miles NE CL-04 0.8 miles SW CL-06 0.8 miles WSW CL-07 2.3 miles SE CL-08 2.2 miles E CL-15 0.9 miles N CL-33 11.7 miles SW CL-84 0.6 miles E CL-90 0.4 miles SE CL-91 6.1 miles ENE CL-97 10.3 miles SW CL-99 3.5 miles NNE CL-114 12.5 miles SE Control CL-11 16 miles S B-4

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Clinton Power Station, 2009 Sample Analysis Sampling Method Analytical Procedure Number Medium Surface Gamma Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Water Spectroscopy from a continuous water compositor. Env. Inc., SPM-1 Sampling Procedure Manual Surface Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid Water from a continuous scintillation water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Drinking Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in Water from a continuous various matrices water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Drinking Gamma Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Water Spectroscopy from a continuous water compositor. Env, Inc., SPM-1 Sampling Procedure Manual Drinking Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid Water from a continuous scintillation water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Well Water Gamma Quarterly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy from a continuous water compositor. Env. Inc., SPM-1 Sampling Procedure Manual Well Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from a continuous scintillation water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Fish Gamma Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis Spectroscopy collected via electroshocking or other techniques Env. Inc., SPM-1 Sampling Procedure Manual Air Gross Beta One-week composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in Particulates of continuous air various matrices sampling through glass fiber filter paper Env. Inc., SPM-1 Sampling Procedure Manual Air Gamma Quarterly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis Particulates Spectroscopy each station Env. Inc., SPM-1 Sampling Procedure Manual Air Iodine Gamma One-week composite TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy of continuous air sampling through Env. Inc., SPM-1 Sampling Procedure Manual charcoal filter Milk 1-131 Bi-weekly grab sample TBE, TBE-2012 Radioiodine in various matrices when cows are on pasture. Monthly all other times Env. Inc., SPM-1 Sampling Procedure Manual B-5

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Clinton Power Station, 2009 Sample Analysis Sampling Method Analytical Procedure Number Medium Food Gross Beta Monthly grab June TBE, TBE-2008 Gross Alpha and/or gross beta activity in Products through September various matrices Env. Inc., SPM-1 Sampling Procedure Manual Food Gamma Monthly grab June TBE, TBE-2007 Gamma emitting radioisotopes analysis Products Spectroscopy through September Env. Inc., SPM-1 Sampling Procedure Manual Grass Gamma Biweekly May through TBE, TBE-2007 Gamma emitting radioisotopes analysis Spectroscopy October Env. Inc., SPM-1 Sampling Procedure Manual TLD Thermoluminescence Quarterly TLDs Global Dosimetry Quality Assurance Manual Dosimetry comprised of two Global Dosimetry CaF 2 elements.

B-6

I I

I 1i17 15-

I .

I 1 I Figure B-I Environmental Sampling Locations Between Within One I . M ile of the Clinton Power Station, 2009 B-7 I'

U

I I

I I .

.... CLINTON

~LAKE .

7 IFigure B-2 Environmental Sampling Locations between One and Two Miles of the Clinton Power Station,. 2009

Figure B-3 Environmental Sampling Locations Between Two and Five Miles of the Clinton Power Station, 2009 B-9

Figure B-4 Environmental Sampling Locations Greater than Five Miles of the Clinton Power Station, 2009 B-10

APPENDIX C DATA TABLES AND FIGURES -

PRIMARY LABORATORY

TABLE C-1.1 CONCENTRATIONS OF 1-131 IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-90 PERIOD 12/31/08 - 01/28/09 < 0.9 01/28/09 - 02/25/09 < 0.5 02/25/09 - 03/25/09 < 0.4 03/25/09 - 04/29/09 < 0.4 04/29/09 - 05/27/09 < 0.8 05/27/09 - 06/24/09 < 0.8 06/24/09 - 07/29/09 < 0.4 07/29/09 - 08/26/09 < 0.3 08/26/09 - 09/30/09 < 0.5 09/30/09 - 10/28/09 < 0.8 10/28/09 - 11/25/09 0.9 +/- 0.2 (1) 11/25/09 - 12/30/09 2.0 +/- 0.5 (1)

MEAN (1)

TABLE C-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-90 CL-13 CL-91 CL-99 PERIOD 01/28/09 03/25/09 174 170 < 164 166 04/29/09 06/24/09 121 120 < 120 122 07/29/09 09/30/09 125 120 < 173 126 10/28/09 12/30/09 150 148 < 159 161 MEAN

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

- m - - - - - - - - - - - - l m - -

TABLE C-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 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 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-13 01/28/09 - 01/28/09 < 15 < 14 < 2 < 2 < 4 < 1 <3 < 2 < 3 < 1 < 2 < 10 < 3 < 12 02/25/09 -02/25/09 < 30 < 63 < 3 <3 <6 < 3 < 6 < 3 < 5 < 3 <4 < 15 < 5 < 23 03/25/09 - 03/25/09 < 19 < 34 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 2 < 2 < 14 < 5 < 16 04/29/09 -04/29/09 < 9 < 20 < 1 < 1 <2 < 1 < 2 < 1 <2 < 1 <1 < 17 < 5 <6 05/27/09 - 05/27/09 < 45 < 34 < 4 <4 < 8 < 4 < 7 < 4 < 7 < 4 < 3 < 28 < 9 < 32 06/24/09 - 06/24/09 < 13 25 + 17 < I < 1 < 3 < 1 < 3 < 1 < 2 < 1 < 1 < 13 < 4 < 9 07/29/09 - 07/29/09 < 30 < 55 < 3 < 3 < 7 < 3 < 6 < 3 < 6 < 3 < 3 < 28 < 8 < 24 08/26/09 - 08/26/09 < 40 < 37 < 3 <4 < 9 < 4 < 7 < 5 < 7 < 4 < 4 < 20 < 8 < 34 09/30/09 - 09/30/09 < 28 < 39 < 3 < 3 < 7 < 3 < 5 < 4 < 6 < 3 < 4 < 20 < 6 < 24 10/28/09 -10/28/09 < 47 < 38 < 4 < 5 < 9 < 3 < 8 < 6 < 8 < 4 < 4 < 31 < 9 < 41 11/25/09 - 11/25/09 < 20 < 18 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 2 < 2 < 19 < 7 < 14 12/30/09 -12/30/09 < 23 < 20 < 2 < 2 < 5 < 2 <4 < 3 <4 < 2 <2 < 22 < 7 < 17 MEAN - 25 +/- 0 - - - - - - - - - - - -

CL-90 12/31/08 - 01/28/09 < 19 < 19 < 2 < 2 < 4 < 2 < 4 < 2 < 4 < 2 < 2 < 14 < 5 < 14 01/28/09 -02/25/09 < 41 < 50 < 4 < 3 < 9 <4 < 8 < 5 < 7 < 4 < 5 < 20 < 9 < 33 02/25/09 -03/25/09 < 17 23 +/- 23 <2 < 2 <4 < 2 < 3 < 2 < 3 < 2 < 2 < 12 < 3 < 16 03/25/09 - 04/29/09 < 41 < 35 < 3 < 4 < 10 < 4 < 8 < 4 <7 < 3 < 4 < 32 < 9 < 32 04/29/09 -05/27/09 < 42 < 54 < 5 < 4 < 11 < 6 < 10 < 6 < 10 < 4 < 5 < 39 < 13 < 29 05/27/09 -06/24/09 < 16 33 +/- 24 < 1 <2 < 4 <2 < 3 <2 < 3 <1 < 2 < 17 < 6 < 10 06/24/09 - 07/29/09 < 28 69 +/- 34 < 2 <3 < 7 <2 < 6 < 3 < 6 < 3 < 3 < 24 < 9 < 20 07/29/09 - 08/26/09 < 56 < 64 < 5 < 5 < 11 <4 < 12 < 6 < 10 < 5 < 6 < 29 < 11 < 45 08/26/09 -09/30/09 < 18 < 36 < 2 <2 <4 < 2 <4 <2 <4 < 2 < 2 < 12 <4 < 16 09/30/09 - 10/28/09 < 37 < 82 < 4 <4 < 8 < 4 < 7 < 5 <7 < 4 < 4 < 24 < 9 < 31 10/28/09 - 11/25/09 < 25 51 +/- 40 <2 < 3 < 6 < 3 < 6 < 3 < 5 <2 < 3 < 25 < 9 < 19 11/25/09 - 12/30/09 < 23 < 19 < 2 < 3 < 5 <2 < 5 < 2 <4 < 2 < 2 < 24 < 5 < 19 MEAN - 44 +/- 40 - - - - - - - - - - - -

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

- - m m- --

m -m - / - -

TABLE C-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 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 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIODI CL-91 ** 12/31/08 - 01/28/09 < 14 32 +/- 23 < 1 <1 <3 <1 <2 <1 <3 <1 <1 < 10 <3 < 11 01/28/09 - 02/25/09 < 34 <62 <4 <3 <8 <3 <7 <4 <7 <4 <4 < 24 <7 < 29 02/25/09 - 03/25/09 < 23 <24 <2 <3 <6 <3 <5 <3 <5 <2 <3 <17 , ,7 <15 03/25/09 - 04/29/09 < 9 35 +/- 29 < 1 .< 1 <1 <1 <1 <1

<2 <2 <2 < 18 <6 <6 04/29/09 - 05/27/09 < 35 < 68 <4 <4 <8 <4 <7 <4 <7 <3 <3 < 29 < 12 < 29 05/27/09 - 06/24/09 < 19 <18 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 19 <7 < 14 06/24/09 - 07/29/09 < 22 <49 <2 <2 <5 <2 <4 <3 <5 <2 <2-

24 <7 < 17 07/29/09 - 08/26/09 < 51 < 113 < 5 <6 < 12 <7 < 12 <6 <9 <5 <6 *21 <9 < 38 08/26/09 - 09/30/09 < 35 <69 < 3 <4 <9 <4 <8 <5 <7 <4 <4 < 27 < 10

27 09/30/09 - 10/28/09 < 48 <90 < 5 <5 <9 <4 <9 <6 < 10 <5 <5 < 32 < 12 < 40 10/28/09 - 11/25/09 < 28 <68 <2 <3 <6 <3 <6 <3 <6 <2 <3 < 25 <8 < 21 11/25/09 - 12/30/09 < 22 <19 <2 <2 <5 <2 <5 <3 <4 <2 <2

25 <8 < 15 MEAN 34+/-5 -

CL-99 ** 12/31/08 - 01/28/09 < 29 <27 <3 <3 <7 <3 <7 <3 <6 <3 <3

22 <6 < 24 01/28/09 - 02/25/09 < 40 <97 <5 <5 <10 <6 < 11 <5 <9 <4 <5 < 27 < 10 < 35 02/25/09 - 03/25/09 < 38 <70 <4 <4 < 10 <4 < 10 <5 <8 <4 <4 < 29 < 10 < 30 03/25/09 - 04/29/09 < 9 <18 <1 <1 <2 <1 <1 <1 <2 <1 <1 < 15 <5 <5 04/29/09 - 05/27/09 < 37 < 36 <4 <3 < 11 <4 <9 <4 <7 <4 <4

32 < 12 < 31 05/27/09 - 06/24/09 < 16 <29 < 1 <2 <4 <2 <3 <2 <3 <1 <2 < 16 <6 <11 06/24/09 - 07/29/09 < 23 <22 <2 <3 <6 <2 <5 <3 <4 <2 <2

23 <8 < 18 07/29/09 - 08/26/09 < 43 78 62 < 4 <4 < 12 <4 < 10 <5 <9 <5 <5 < 24 <6 < 38 08/26/09 - 09/30/09 < 41 <47 <4 <5 <8 <4 <9 <5 <8 <4 <5 < 33 < 10 < 33 09/30/09 - 10/28/09 < 32 <57 <3 <3 <8 <3 <7 <4 <6 <3 <3 < 21 <7 < 25 10/28/09 - 11/25/09 < 20 37 26 < 2 <2 <4 <2 <4 <2 <4 <2 <2 < 21 <6 < 16 11/25/09 - 12/30/09 < 22 <23 <2 <3 <6 <3 <5 <3 <5 <2 <2 < 25 <9 < 18 MEAN 57 +/- 59

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

- INDICATES CONTROL LOCATION

TABLE C-I1.1 CONCENTRATIONS OF GROSS BETA IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-14 PERIOD 12/31/08 01/28/09

2.4 01/28/09 02/25/09 2.4 +/- 1.4 02/25/09 03/25/09 < 2.3 03/25/09 04/29/09 < 2.1 04/29/09 05/27/09

3.3 05/27/09 - 06/24/09 7.7 +/- 2.2 06/24/09 07/29/09 < 2.5 07/29/09 08/26/09 < 2.6 08/26/09 09/30/09 < 2.3 09/30/09 10/28/09 < 2.1 10/28/09 - 11/25/09 < 2.1 11/25/09 - 12/30/09

2.3 MEAN 5.0 +/- 7.5 TABLE C-11.2 CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-14 PERIOD 12/31/08 03/25/09 < 168 03/25/09 06/24/09

122 06/24/09 09/30/09 < 178 09/30/09 12/30/09

161 MEAN

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-4

m m m " m - - m -

m -- m mm-m TABLE C-1I.3 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 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 Ce-144 PERIOD CL-14 12/31/08 - 01/28/09 < 20

40 <2 <2 <5 <2 <4 <2 <4 <6 <2 <2 <14 <5 < 17 01/28/09 - 02/25/09 < 24 < 39 <3 <2 <5 <3 <5 <3 <5 <6 <2 <3 < 14 <5 < 20 02/25/09 - 03/25/09 < 26 < 57 <3 <3 <7 <3 <5 <4 <5 <9 <3 <3 < 19 <6

21 03/25/09 - 04/29/09 <11 <7 <1 <1 <3 <1 <2 <1 <2 < 15 <1 <1 < 19 <6 <6 04/29/09 - 05/27/09 < 28 < 32 <2 <4 <4 <3 <7 <3 <5 < 11 <3 <3 < 23 <5

17 05/27/09 - 06/24/09 < 17 < 34 <2 <2 <5 <2 <3 <2 <4 <11 <2 <2 <19 <6 < 14 06/24/09 - 07/29/09 < 29 48 +42 <2 <3 <5 <3 <7 <3 <5 <13 <2 <3

28 <9 < 20 07/29/09 - 08/26/09 <41 86 +62 <5 <6 < 13 <5 < 11 <6 < 10 <9 <5 <6 < 27 <8 < 44 08/26/09 - 09/30/09

36

42 <4 <5 <9 <5 <9 <4 <8 < 11 <4 <4 < 26 < 10 < 27 09/30/09 - 10/28/09 < 44 < 38 <4 <5 <8 <4 <7 <5 <9

15 <4 <4

31 <7 < 35 10/28/09 - 11/25/09

28 < 46 <3 <3 <7 <3 <5 <3 <5 < 15 <2 <3 < 25 <9 < 18 11/25/09 - 12/30/09

23 54 +40 <2 <2 <5 <2 <4 <3 <4 < 14 <2 <2

23 <9 < 16 MEAN 63 +/- 40

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

TABLE C-II1.1 CONCENTRATIONS OF TRITIUM INWELL WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-07D CL-12R CL-12T PERIOD 03/25/09 - 03/25/09 < 193 < 191 < 199 06/24/09 - 06/24/09

181 < 185 < 183 09/30/09 - 09/30/09 < 175 < 163 < 161 12/30/09 - 12/30/09 < 166 < 169 < 154 MEAN C-6

m m " m = = m m m mm m= m m m TABLE C-111.2 CONCENTRATIONS OF GAMMA EMITTERS IN WELL WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 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 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-07D 03/25/09 < 37 < 38 <4 <4 <9 <4 <7 <4 <8 <4 <4 < 23 <7 <*

06/24/09 < 31 < 74 <3 <3 <5 <3 <7 <4 <6 <3 <4 < 24 <6 < 25 09/30/09 < 17 < 14 <2 <2 <4 <2 <3 <2 <3 <1 <2 < 19 <5 < 14 12/30/09 < 12 34 +/- 31 <1 <1 <3 <1 <2 <1 <2 <1 <1 < 17 <5 <9 MEAN 34 +/- 0

<8 <4 <4 < 29 < 11 < 34 CL-12R 03/25/09 < 44 < 92 <4 <4 <8 <4 < 10 <5 06/24/09 < 37 91 +/- 55 <4 <5 < 10 <4 <9 <5 <8 <4 <4 < 33 <9 < 32 09/30/09 < 17 < 17 <2 <2 <4 <2 <3 <2 <3 <1 <2 < 17 <6 < 12 12/30/09 <9 < 32 <1 <1 <2 <1 <2 <1 <2 <1 <1 < 12 <4 <6 MEAN 91 +/- 0 CL-12T 03/25/09 < 29 37 +/- 30 <3 <3 <7 <3 <6 <3 <5 <3 <3 < 22 <6 < 27 06/24/09 < 37 <37 <4 <4 <9 <4 <9 <5 <7 <4 <4 < 30 < 10 < 28 09/30/09 < 23 < 20 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 23 <7 < 18 12/30/09 < 14 < 11 <1 <1 <4 <2 <2 <2 <3 <1 <1 < 17 <5 <9 MEAN 37 +/- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

mm -No mm m mmm mm =m m m m m TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-105 Crappie 04/23/09 < 366 3060 +/- 452 < 29 < 36 < 90 < 23 < 58 < 38 < 67 < 25 < 29 < 752 < 222 < 164 Carp 04/23/09 < 314 3390 +/- 453 < 24 < 32 < 72 < 26 < 49 < 32 < 58 < 24 < 23

648 < 183 < 157 Largemouth bass 04/23/09 < 472 3140 +/- 554 < 40 < 50 < 117 < 31 < 86 < 53 < 93 < 36 < 40

1030 < 290 < 214 Bluegill 04/23/09 < 396 3150 +/- 507 < 31 < 43 < 100 < 32 < 82 < 47 < 71 < 31 < 29

850 < 254 < 173 Bluegill 10/19/09 < 954 3720 t 1340 < 74 < 87 < 214 < 94 < 141 < 101 < 195 < 71 < 70

1010 < 503 < 423 Carp 10/19/09 < 559 2200 +/- 846 < 45 < 62 < 115 < 47 < 108 < 59 < 100 < 47 < 57

866 < 263 < 325 Crappie 10/19/09 < 628 2410 +/- 889 < 67 < 66 < 151 < 57 < 122 < 74 < 129 < 65 < 59

795 < 227 < 326 Largemouth bass 10/19/09 < 932 3930 +/- 1190 < 74 < 91 < 231 < 70 < 158 < 105 < 151 < 76 < 81

1040 < 323 < 419 MEAN 3125 +/- 1182 00 CL-19 Carp 04/23/09 < 464 3660 +/- 536 < 35 < 49 < 114 < 33 < 71 < 52 < 81 < 32 < 34 < 959 < 286 < 215 Bluegill 04/23/09 < 352 2890 +/- 456 < 29 < 35 < 97 < 32 < 68 < 42 < 71 < 28 < 29 < 793 < 256 < 143 Channel catfish 04/23/09 < 420 3850 +/- 560 < 37 < 41 < 112 < 32 < 77 < 50 < 89 < 34 < 36 < 928 < 279 < 163 Largemouth bass 04/23/09 < 418 3770 +/- 485 < 34 < 48 < 100 < 29 < 70 < 51 < 81 < 34 < 33 < 876 < 248 < 183 Bluegill 10/19/09 < 675 3700 +/- 1160 < 59 < 70 < 225 < 73 < 132 < 75 < 148 < 52 < 60 < 703 < 332 < 370 Carp 10/19109 < 530 2690 +/- 775 < 61 < 62 < 120 < 38 < 100 < 62 < 84 < 47 < 55 < 651 < 202 < 248 Channel catfish 10/19/09 < 409 2400 +/- 657 < 39 < 46 < 110 < 49 < 82 < 47 < 75 < 40 < 47 < 634 < 181 < 200 Largemouth bass 10/19/09 < 528 2960 +/- 823 < 57 < 63 < 142 < 57 < 109 < 80 < 97 < 54 < 58 < 864 < 313 < 361 MEAN 3240 +/- 1134 -

m m m mm m w m m G m m m m m TABLE C-V.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nib-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-07B 04123/09 < 478 7480 +/- 776 < 44 < 55 < 130 < 44 < 99 < 58 < 107 < 39 < 36 < 926 < 247 < 243 10/19/09 < 337 6980 +/- 662 < 30 < 30 < 77 < 26 < 53 < 35 < 58 < 24 < 30 < 392 < 124 < 153 MEAN - 7230 +/- 707 - - - - -

TABLE C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I PERIOD CL-02 CL-03 CL-04 CL-06 CL-15 CL-94 12/31/08 - 01/07/09 28 +/-5 28 +/-5 22 +/-5 31 +/-5 26 +/-5 24+/- 5 01/07/09 -01/14/09 35 +/-5 33 +/-5 37 +/-5 36 +/-5 38 +/-5 33+/- 5 01/14/09 - 01/21/09 32 +/-5 33 +/-5 30 +/-5 26 +/-5 33 +/-5 29 +/-5 01/21/09 - 01/28/09 28 +/-5 25 +/-5 31 +/-5 29 +/-5 29 +/-5 28 +/-5 01/28/09 - 02/04/09 19 +/-4 23 +/-5 17 +/-4 19 +/-4 20 +/-4 20 +/-4 02/04/09 -02/11/09 29 +/-5 29 +/-5 27 +/-5 27 +/-5 28 +/-5 25 +/-5 02/11/09 - 02/18/09 21 +/- 5 18 +/- 4 19 +/- 5 23 +/- 5 22 +/- 4 22 +/- 5 02/18/09 -02/25/09 17 +/-4 32 +/-5 33 +/-5 27 +/-7 28 +/-5 32+/- 5 02/25/09 -03/04/09 21 +/-5 22 +/-5 22 +/-5 21 +/-5 22 +/-5 22+/- 5 03/04/09 - 03/11/09 15 +/- 4 20 +/- 5 17 +/- 5 16 +/- 5 13 +/- 4 11 +/- 4 03/11/09 -03/18/09 22 +/-5 22 +/-5 27 +/-5 24 +/-5 21 +/-4 26+/- 5 03/18/09 - 03/25(09 20 +/-4 18 +/-4 20 +/-4 20 +/-4 19 +/-4 24+/- 5 03/25/09 - 04/01/09 15 +/- 4 11 +/- 4 18 +/- 4 13 +/- 4 15 +/- 4 12 +/- 4 04/01/09 - 04/08/09 15 +/- 4 12 +/- 4 13 +/- 4 13 +/- 4 12 +/- 4 14 +/-4 04/08/09 - 04/15/09 18 +/-4 18 +/-4 18 +/-4 19 +/-4 19 +/-4 18+/-4 04/15/09 - 04/22/09 10 +/-4 10 +/-4 10 +/-4 12 +/-4 13 +/-4 10+/-4 04/22/09 - 04/29/09 17 +/-4 17 +/-4 12 +/-4 17 +/-4 17 +/-4 15+/-4 04/29/09 - 05/06/09 16 +/-4 17 +/- 4 15 +/-4 17 +/-4 12 +/-4 14+/-4 05/06/09 - 05/13/09 11 +/- 4 14 +/- 4 11 +/- 4 11 +/- 4 10 +/- 4 11 +/-4 05/13/09 - 05/20/09 9 +/-3 10 +/-4 14 +/-4 9 +/-3 11 +/-4 17+/-4 05/20/09 - 05/27/09 13 +/- 4 19 +/- 5 19 +/- 5 21 +/- 5 (1) 11 +/- 4 15 +/-4 05/27/09 - 06/03/09 16 +/-4 14 +/-4 13 +/-4 14 +/-4 10 +/-4 5 +/-3 06/03/09 - 06/10/09 15 +/-4 17 +/-4 14 +/-4 16 +/-4 14 +/-4 14+/- 4 06/10/09 - 06/17/09 17 +/-4 18 +/-4 15 +/-4 17 +/-4 18 +/-4 17 +/-4 06/17/09 - 06/24/09 19 +/-4 16 +/-4 16 +/-4 16 +/-4 15 +/-4 16+/- 4 06/24/09 - 07/01/09 9 +/- 4 14 +/- 5 11 +/- 4 14 +/- 4 10 +/- 4 15 +/- 5 07/01/09 - 07/08/09 17 +/- 4 16 +/- 4 13 +/- 4 15 +/-4 15 +/-4 14+/-4 07/08/09 - 07/15/09 22 +/-5 20 +/-4 13 +/-4 22 +/-5 15 +/-4 16+/-4 07/15/09 - 07/22/09 7 +/- 4 11 +/- 4 15 +/- 4 13 +/- 4 12 +/- 4 15 +/-4 07/22/09 -07/29/09 19 +/-5 18 +/-5 16 +/-4 20 +/-5 20 +/-5 19+/-4 07/29/09 -08/05/09 14 +/-4 13 +/-4 15 +/-4 22 +/-5 13 +/-4 15+/-4 08/05/09 - 08/12/09 20 +/-5 18 +/-4 19 +/-4 21 +/-5 13 +/-4 21+/-5 08/12/09 - 08/19/09 21 +/-5 21 +/-4 21 +/-4 25 +/-5 17 +/-4 25+/-5 08/19/09 - 08/26/09 15 +/- 4 11 +/- 4 12 +/- 4 16 +/- 4 15 +/- 4 12 +/-4 08/26/09 - 09/02/09 22 +/-4 17 +/-4 13 +/-4 17 +/-4 25 +/-4 19 +/-4 09/02/09 -09/09/09 28+/-5 31 +/-5 31 +/-5 36 +/-5 29 +/-5 30+/- 5 09/09/09 -09/16/09 37 +/-6 30 +/-5 35 +/-5 36 +/-5 31 +/-5 36+/- 6 09/16/09 - 09/23/09 23 +/-5 19 +/-5 21 +/-4 20 +/-4 21 +/-5 14+/- 4 09/23/09 - 09/30/09 25 +/-4 21 +/-4 21 +/-4 19 +/-4 19 +/-4 16 +/-4 09/30/09 - 10/07/09 12 +/-4 12 +/-4 14 +/-4 13 +/-4 8 +/-4 12+/- 4 10/07/09 - 10/14/09 14 +/- 4 15 +/- 4 13 +/- 4 15 +/- 4 11 +/- 4 15 +/- 4 10/14/09 - 10/21/09 16 +/-4 14 +/-4 14 +/-4 17 +/-4 14 +/-4 17+/- 4 10/21/09 - 10/28/09 13 +/- 4 16 +/- 5 15 +/- 5 14 +/- 4 17 +/- 5 15 +/- 5 10/28/09 - 11/04/09 21 +/- 4 20 +/- 4 19 +/- 4 20 +/- 4 19 +/- 4 19 +/- 4 11/04/09 - 11/11/09 24 +/- 4 23 +/- 4 16 +/- 4 23 +/- 4 21 +/- 4 24 +/-4 11/11/09 - 11/18/09 17 +/- 4 18 +/- 4 18 +/- 4 14 +/- 4 15 +/- 4 15 +/-4 11/18/09 - 11/25/09 26 +/- 4 22 +/- 4 24 +/- 4 26 +/- 4 26 +/- 4 23 +/-4 11/25/09 -12/02/09 21 +/-5 28 +/-5 28 +/-5 25 +/-5 24 +/-5 23+/-5 12/02/09 - 12/09/09 17 +/-5 20 +/-5 21 +/-5 21 +/-5 18 +/-5 17+/-5 12/09/09 -12/16/09 33+/- 5 34 +/-5 33 +/-4 33 +/-4 36 +/-5 33+/-4 12/16/09 -12/23/09 39 +/-6 38 +/-6 34 +/-6 38 +/-6 36 +/-6 41+/-6 12/23/09-12/30/09 22+/-S5 29+/- 5 23 +/-4 33+/-S5 28+/-S5 27+/-5 MEAN 20 +/- 14 20 +/- 14 20 +/- 14 21 +/- 14 19 +/- 15 20 +/-15 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION c-i1o

TABLE C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/-2 SIGMA COLLECTION GROUP 11 GROUP III PERIOD CL-01 CL-07 CL-08 CL-li1 12/:31/08 -01/01/09 28 +/- 5 30 +/- 5 25 +/- :5 30 +/- 5 01/07/09-01/14/09 30 +/-5 32 +/-5 38 +/-5 39+/- 5 01/14/09 -01/21/09 27 +/-5 30 +/-5 27 +/-5 27+/- 5 01/21/09 -01/28/09 25 +/-5 28 +/-5 31 +/- 5 29+/- 5 01/28/09 -02/04/09 17 +/-4 20 +/-4 20 +/-4 19 +/-4 02/04/09 -02/11/09 28 +/-5 26 +/-5 27 +/-5 29 +/-5 02/11/09 -02/18/09 23 +/- 5 22 +/- 5 21 +/- 4 26 +/- 5 02/18/09-02/25/09 29 +/-5 33 +/-5 27 +/-5 31 +/-5 02/25/09 -03/04/09 19 +/-4 19 +/-5 20 +/-5 24+/- 5 03/04/09 -03/11/09 14 +/-4 18 +/-4 14 +/-4 9+/-t4 03/11/09 -03/18/09 23 +/-5 22 +/-4 27 +/-5 25+/- 5 03/18/09 - 03/25/09 21 +/-4 20 +/-4 19 +/-4 20+/- 4 03/25/09 - 04/01/09 12 +/-4 15 +/-4 13 +/-4 14+/- 4 04/01/09 - 04/08/09 17 +/-4 15 +/-4 12 +/-4 14+/- 4 04/08/09 - 04/15/09 19 +/-4 16 +/-4 16 +/-4 17+/- 4 04/15/09 - 04/22/09 12 +/- 4 10 +/- 4 11 +/- 4 12 +/- 4 04/22/09 - 04/29/09 16 +/-4 14 +/-4 20 +/-4 17+/- 4 04/29/09 - 05/06/09 16 +/-4 12 +/-4 6 +/-3 7 +/-4 05/06/09 - 05/13/09 11 +/-4 13 +/-4 7 +/-4 10+/- 4 05/13/09 - 05/20/09 15 +/- 4 11 +/- 4 10 +/- 4 11 +/- 4 05/20/09 - 05/27/09 15 +/-4 13 +/-4 19 +/-5 15+/- 4 05/27/09 - 06/03/09 14 +/-4 12 +/-4 6 +/-3 16+/- 4 06/03/09 - 06/10/09 14 +/-4 16 +/-4 13 +/-4 15+/- 4 06/10/09 - 06/17/09 18 +/-4 14 +/-4 17 +/-4 15+/- 4 06/17/09 - 06/24/09 13 +/- 4 17 +/- 4 18 +/- 4 17 +/- 4 06/24/09 - 07/01/09 16 +/- 5 11 +/- 4 12 +/- 5 15 +/- 5 07/01/09 - 07/08/09 16 +/-4 13 +/-4 17 +/-4 14+/- 4 07/08/09 - 07/15/09 21 +/-4 26+/-t5 20 +/-4 21+/- 4 07/15/09 - 07/22/09 12 +/-4 10 +/-4 15 +/-4 15+/- 4 07/22/09 - 07/29/09 18 +/-5 18+/-t4 18 +/-4 19+/- 4 07/29/09 - 08/05/09 10 +/-4 18 +/-5 15 +/-4 15+/- 4 08/05/09 - 08/12/09 16 +/-4 18 +/-4 19 +/-4 21+/- 5 08/12/09 - 08/19/09 17 +/-4 21 +/-5 24 +/-5 22+/- 5 08/19/09 - 08/26/09 11 +/- 4 12 +/- 4 15 +/- 4 15 +/- 4 08/26/09 - 09/02/09 15 +/-4 19 +/-4 16 +/-4 19+/- 4 09/02/09 - 09/09/09 34 +/-5 32 +/-5 33 +/-5 13+/- 4 09/09/09 - 09/16/09 34 +/-5 31 +/-5 33 +/-5 33 +/-5 09/16/09 - 09/23/09 20 +/-5 17 +/-4 25 +/-5 7 +/-4 09/23/09 - 09/30/09 22 +/-4 17 +/-4 17 +/-4 19+/- 4 09/30/09 - 10/07/09 8 +/-4 10 +/-4 11 +/-4 12+/- 4 10/07/09 - 10/14/09 16 +/-4 12 +/-4 9 +/-4 15+/- 4 10/14/09 - 10/21/09 19 +/- 5 17 +/- 4 17 +/- 4 10 +/- 4 10/21/09 - 10/28/09 14 +/-4 12 +/-4 14 +/-4 17+/- 5 10/28/09 - 11/04/09 18 +/- 4 17 +/- 4 15 +/- 4 20 +/- 4 11/04/09 - 11/11/09 20 +/- 4 26 +/- 4 21 +/- 4 24 +/- 4 11/11/09 - 11/18/09 20 +/- 4 14 +/- 4 21 +/- 4 16 +/- 4 11/18/09 - 11/25/09 25 +/- 4 22 +/- 4 29 +/- 4 25 +/- 4 11/25/09 - 12/02/09 26 +/-5 23 +/-5 20 +/-5 14+/- 4 12/02/09 -12/09/09 20 +/-5 18 +/-5 22 +/-5 22+/- 5 12/09/09 - 12/16/09 30 +/-4 34 +/-4 33 +/-4 29+/- 4 12/16/09 - 12123/09 39 +/-6 40 +/-6 35 +/-6 41+/- 6 12/23/09 -12/30/09 26 +/-5 24 +/-5 24 +/-5 28+/- 5 MEAN 20 +/-13 19 +/-15 19 +/-15 19 +/-15

INDICATES CONTROL STATION C-1lI

= il!m m - - - m -= m mm - m -I TABLE C-VI.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - ON-SITE LOCATIONS GROUP II - INTERMEDIATE DISTANCE LOCATIONS GROUP III - CONTROL LOCATIONS COLLECTION MIN MAX MEAN+ COLLECTION MIN MAX MEAN+ COLLECTION MIN MAX MEAN +

PERIOD 2SD PERIOD 2SD PERIOD 2SD 1 /I0 I/UO U IIlzoUz ZL o0 OU U I/zlIut, IlL0lU~ LU 00 I ILl,) IIUO

" o I1"ila l/UO u ao - UII--OUu 27 39 31 +/- 1U 01/28/09 02/25/09 17 33 24 + 10 01/28/09 02/25/09 17 33 24 +/- 9 01/28/09 - 02/25/09 19 31 26 +/- 10 02/25/09 04/01/09 11 27 19 9 02/25/09 04/01/09 12 27 18 +/- 8 02/25/09 - 04/01/09 9 25 19 +/- 14 04/01/09 04/29/09 10 19 14 6 04/01/09 04/29/09 10 20 15 +/- 6 04/01/09 - 04/29/09 12 17 15 +/- 5 04/29/09 06/03/09 5 21 13 7 04/29/09 06/03/09 6 19 12 +/- 7 04/29/09 - 06/03/09 7 16 12 +/- 7 06/03/09 07/01/09 9 19 15 +/- 5 06/03/09 07/01/09 11 18 15 +/- 5 06/03/09 - 07/01/09 15 17 15 +/- 3 07/01/09 07/29/09 7 22 16 +/- 7 07/01/09 07/29/09 10 26 17 +/- 8 07/01/09 - 07/29/09 14 21 17 +/- 6 07/29/09 09/02/09 11 25 18 +/- 8 07/29/09 09/02/09 10 24 16 +/- 7 07/29/09 - 09/02/09 15 22 18 +/- 6 09/02/09 09/30/09 14 37 26 +/- 14 09/02/09 09/30/09 17 34 26 +/- 15 09/02/09 - 09/30/09 7 33 18 +/- 22 NJ 09/30/09 10/28/09 8 17 14 4 09/30/09 10/28/09 8 19 13 +/- 7 09/30/09 - 10/28/09 10 17 14 +/- 6 10/28/09 12/02/09 14 28 21 +8 10/28/09 12/02/09 14 29 21 +/- 8 10/28/09 - 12/02/09 14 25 20 +/- 10 12/02/09 12/30/09 17 41 29 +15 12/02/09 12/30/09 18 40 29 +/- 15 12/02/09 - 12/30/09 22 41 30 +/- 16 12/31/08 - 12/30/09 5 41 20 +/- 14 12/31/08 - 12/30/09 6 40 19 +/- 14 12/31/08 - 12/30/09 7 41 19 +/- 15

GROUP I LOCATIONS WITHIN 1 MILES OF CPS

- GROUP II LOCATIONS WITHIN 1-5 MILES OF CPS GROUP IIILOCATIONS GREATER THAN 5 MILES OF CPS

S= m m - - m m= m m = - - m -

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 PERIOD CL-01 12/31/08 - 04/01/ '09 78 +/- 31 < 24 <4 <4 <7 <6 < 29 <3 <3 < 10 < 18 04/01/09 - 07/01/ '09 90 +/- 53 < 49 <2 < 10 < 14 < 11 < 31 <3 <3 < 17 < 14 07/01/09 - 09/30/'09 168 +/- 53 < 37 <2 < 10 < 11 < 13 < 33 <4 <4 < 24 < 24 09/30/09 - 12/30/ '09 35 +/- 31 < 74 <3 <4 <9 <5 < 38 <4 <3 <7 < 18 MEAN 93 +/- 111 CL-02 12/31108 04/01/09 61 +/- 20 < 37 <2 <3 <5 <4 < 19 <2 <2 <5 < 11 04/01/09 07/01/09 89 +/- 44 < 47 <3 <7 < 12 <9 < 24 <3 <3 < 14 < 13 07/01/09 09/30/09 133 +/- 40 < 50 <3 <8 < 14 < 10 < 33 <4 <3 < 16 < 14 09/30/09 12/30/09 70 +/- 37 < 80 <4 <6 <7 <5 < 23 <4 <3 <7 < 17 MEAN 88 +/- 64 CL-03 12/31/08 04/01/09 80 +/- 31 < 66 <4 <5 <7 <5 < 28 <3 <3 <8 < 17 04/01/09 07/01/09 103 +/- 46 < 46 <3 <6 <8 < 10 < 27 <3 <3 < 14 < 12 07/01/09 09/30/09 64 +/- 34 < 50 <2 <7 < 10 <8 < 26 <3 <2 < 17 < 14 09/30/09 12/30/09 57 +/- 23 < 68 <4 <5 <9 <4 < 37 <5 <3 <6 < 15 MEAN 76 +/- 41 CL-04 12/31/08 04/01/09 86 +/- 25 26 +/- 20 < 3 <5 8 <5 < 22 <3 <3 <6 < 11 04/01/09 07/01/09 98 +/- 43 38 +/- 28 < 3 <6 13 < 12 < 29 <3 <3 < 18 < 16 07/01/09 09/30/09 89 +/- 44 < 37 <4 <7 14 < 12 < 38 <4 <3 < 20 < 16 09/30/09 12/30/09 < 44 < 76 <6 <6 8 <6 < 41 <5 <4 <6 < 19 MEAN 91 +/- 12 32 +/- 17 CL-06 12/31/08 04/01/09 82 +/- 27 < 44 <3 <4 5 <5 < 20 <3 <2 <6 < 11 04/01/09 07/01/09 77 +/- 47 25 +/-21 <3 <5 9 <8 < 19 <3 <2 < 14 < 12 07/01/09 09/30/09 886 +/- 381 < 668 < 41 < 68 100 < 63 < 227 < 35 < 28 < 90 < 128 09/30/09 12/30/09 68 +/- 28 < 83 <3 <6 8 <5 < 29 <4 <4 <6 < 15 MEAN 278 +/- 810 25 +0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

- m m m w = - m m - I=_ - m m - m -

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS INAIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 PERIOD CL-07 12/31/08 - 04/01/09 61 +/- 25 53 + 23 < 3 <5 <7 <5 < 26 <3 <4 <7 16 04/01/09 - 07/01/09 91 +/- 57 < 56 <4 <8 < 10 < 10 < 32 <4 <3 < 20 17 07/01/09 - 09/30/09 77 +/- 53 < 27 <2 <5 < 12 < 11 < 29 <4 <3 < 20 17 09/30/09 - 12/30/09 60 +/- 30 < 82 <5 <5 < 10 <6 < 40 <5 <4 <8 18 MEAN 72 +/- 29 53 +/- 0 CL-08 12/31/08 - 04/01/09 111 +/- 29 < 59 <3 <4 <8 <6 < 29 <3 <3 <9 19 04/01/09 - 07/01/09 83 +/- 32 < 39 <3 <4 <8 <8 < 23 <3 <2 < 13 11 07/01/09 - 09/30/09 84 +/- 32 < 29 <3 <5 <7 <9 < 23 <3 <2 < 12 11 09/30/09 - 12/30/09 78 +/- 37 <61 <4 <4 <8 <6 < 41 <5 <4 <7 17 MEAN 89 +/- 30 CL-1I ** 12/31/08 - 04/01/09 73 +/- 23 < 32 <3 <3 <7 <4 < 24 <2 <2 <5 10 04/01/09 - 07/01/09 141 +/- 50 < 43 <4 <7 < 11 < 10 < 31 <4 <3 < 18 16 07/01/09 - 09/30/09 91 +/- 46 < 73 <5 < 10 < 13 < 12 < 37 <4 <5 < 26 23 09/30/09 - 12/30/09 67 +/- 28 < 95 <4 <5 <9 <6 < 43 <4 <4 <7 17 MEAN 93 +/- 67 CL-15 12/31/08 - 04/01/09 90 +/- 36 < 30 <3 <3 <6 <5 < 29 <3 <4 <7 < 15 04/01/09 - 07/01/09 72 +/- 47 < 31 <3 <6 < 11 <8 < 28 <4 <2 < 13 < 11 07/01/09 - 09/30/09 110 +/- 41 < 40 <4 <7 < 12 <9 < 34 <4 <3 < 16 < 14 09/30/09 - 12/30/09 84 +/- 31

69 <4 <4 <8 <4 < 32 <4 <3 <6 < 18 MEAN 89 +/- 32 CL-94 12/31/08 - 04/01/09 91 +/- 22 < 40 <3 <4 <9 <5 < 24 <3 <3 <6 < 11 04/01/09 - 07/01/09 92 +/- 47 < 44 <2 <7 < 10 < 10 < 25 <3 <2 < 14 < 13 07/01/09 - 09/30/09 77 +/- 37 < 46 <3 <6 < 11 < 10 < 23 <3 <2 < 17 < 15 09/30/09 - 12/30/09 78 +/- 26 < 82 <5 <5 <9 <6 < 33 <4 <3 <7 < 15 MEAN 85 +/- 16

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

- INDICATES CONTROL STATION

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I PERIOD CL-02 CL-03 CL-04 CL-06 CL-15 CL-94 I

12/31/08 -01/07/09

35

35

35

35

57 1< 58 01/07/09 -01/14/09

25

25

26

25

45

46 01/14/09 -01/21/09

47 *<46

47

45 *<40

41 01/21/09 -01/28/09

25

41

41

40

36

37 01/28/09 -02/04/09

57

56

56

55

41

43 02/04/09 -02/11/09 < 40

29

38

37 *<64

66 02/11/09 -02/18/09

56

55

58 < 54

59

62 02/18/09 -02/25/09

26

24

19

40

22

22 02/25/09 -03/04/09

59

60

59

62 < 45

46 03/04/09 -03/11/09

50

49

50

30

35

36 03/11/09 -03/18/09

45

42 *<42

42

39

38 03/18/09 -03/25/09

32

33

32

31

38

38 03/25/09 -04/01/09

54

54 < 54

53

18

17 04/01/09 -04/08/09

67

64

65 *<64

55

56 04/08/09 -04/15/09

35

34 < 34

33

33

33 04/15/09 -04/22/09

65

61

63

64

66

66 04/22/09 -04/29/09

52

50

47

46

38

40 04/29/09 -05/06/09

70

68

66

66

28

52 05/06/09 -05/13/09

60

59

58

59 *<41

41 05/13/09 -05/20/09

59

60

59

59

50

41 05/20/09 - 05/27/09 *<41

42

39

39 (1)

53

53 05/27/09 - 06/03/09 *<54

52

54

53

66

68 06/03/09 - 06/10/09

51

51

50

49

61

62 06/10/09 - 06/17/09

22

52

30

29

61

62 06/17/09 - 06/24/09

67

14

65

65

38

14 06/24/09 - 07/01/09

59

25

59

58

66

65 07/01/09 - 07/08/09 < 40

40

40

22

35

15 07/08/09 - 07/15/09

53

54

32

56

27 *<64 07/15/09 - 07/22/09

26 *<47

46

45

46

46 07/22/09 - 07/29/09

12

22

22

22

13

29 07/29/09 - 08/05/09

19

20

19

19

10

14 08/05/09 - 08/12/09

20 < 11

19

19

32

31 08/12/09 - 08/19/09

31

31

31

13

25 < 11 08/19/09 - 08/26/09

33

35

33

33

32

31 08/26/09 - 09/02/09

40 *<41

23

40

40

40 09/02/09 - 09/09/09

43

25 < 43

42

50

49 09/09/09 - 09/16/09

33

61

58

59

50

50 09/16/09 - 09/23/09

36

21

35

36

18

32 09/23/09 - 09/30/09

20 < 11

20

20

26

57 09/30/09 - 10/07/09

42

44

43 *<42

62

61 10/07/09 - 10/14/09

21

12

21

21

14

33 10/14/09 - 10/21/09

29

31

32

31

20

45 10/21/09 - 10/28/09

27

27

16

27

32

56 10/28/09 - 11/04/09

32

55

55 < 51

54

54 11/04/09 - 11/11/09

56

57

32

57

67

66 11/11/09 - 11/18/09

59

30

63

59

32

51 11/18/09 - 11/25/09

66

64

37

64

28

66 11/25/09 - 12/02/09

46

47

26

47

60

60 12/02/09 - 12/09/09 < 43

42

43 < 43

32

32 12/09/09 - 12/16/09

57

59

57

32

67

67 12/16/09 - 12/23/09

62

62

35

62

23

54 12/23/09 - 12/30/09

46

45

46

45

50

50 MEAN--

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-i15

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP 11 GROUP III PERIOD CL-01 CL-07 CL-08 CL-liI 12/31/08 -01/07/09

28

25

58

58 01/07/09 -01/14/09

14

19

44

45 01/14/09 -01/21/09

26

32 *<41

40 01/21/09 -01/28/09

41

27

36

36 0 1/28/09 -02/04/09

43

23 < 43 < 43 02/04/09 -02/11/09

39

25

62

58 02/11/09 -02/18/09 < 44

27

62

63 02/18/09 -02/25/09

24

15

22

22 02/25/09 -03/04/09

33

31 *<46

45 03/04/09 -03/11/09

49

27

35

34 03/11/09 -03/18/09

21

21

40

39 03/18/09 -03/25/09

17

21

37

38 03/25/09 -04/01/09

30

14

17

17 04/01/09 -04/08/09

36

53

31

53 04/08/09 -04/15/09

19

26

33

32 04/15/09 - 04/22/09

35

66

66

51 04/22/09 - 04/29/09

27

31

39 < 40 04/29/09 - 05/06/09

29

52

51

53 05/06/09 - 05/13/09

49

18 < 41 < 41 05/13/09 - 05/20/09

33

51

50

51 05/20/09 - 05/27/09

30

30

54

54 05/27/09 - 06/03/09

29

37

66

66 06/03/09 - 06/10/09

28

26

61

65 06/10/09 - 06/17/09

53

31

31

25 06/17/09 - 06/24/09

68

38

39

39 06/24/09 - 07/01/09

60

37

67

64 07/01/09 - 07/08/09 *<41

34 < 34

37 07/08/09 - 07/15/09

53

63

63

62 07/15/09 - 07/22/09

46

45

25

46 07/22/09 - 07/29/09

22

29

29

28 07/29/09 - 08/05/09

10

14

14

14 08/05/09 - 08/12/09

20

13

31

31 08/12/09 - 08/19/09

31

25

24

25 08/19/09 - 08/26/09

15

31

17

31 08/26/09 - 09/02/09

39

40

39

40 09/02/09 - 09/09/09

44

49

48

21 09/09/09 - 09/16/09

60

37

61

48 09/16/09 - 09/23/09

37

33

32

34 09/23/09 - 09/30/09

20

57

56

57 09/30/09 - 10/07/09

43

61

60

26 10/07/09 - 10/14/09

21

32

33

33 10/14/09 - 10/21/09

17 < 45

44 < 45 10/21/09 - 10/28/09

28

55

55

56 10/28/09 - 11/04/09 < 54

30

53

53 11/04/09 - 11/11/09

57

66

66

29 11/11/09 - 11118/09 < 61

50 < 52 *<51 11/18/09 - 11/25/09

65

66

65

65 11/25/09 - 12/02/09

49

59

61

26 12/02/09 - 12/09/09

19

18

32

32 12/09/09 - 12/16/09

59

65

66

28 12/16/09 - 12/23/09

61

53

53

54 12/23/09 - 12/30/09

20

28

49

49 MEAN

INDICATES CONTROL STATION C-16

TABLE C-VIII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARM COLLECTION CL-116 PERIOD 01/28/09 < 0.7 02/25/09 < 0.6 03/25/09 < 0.9 04/29/09 < 0.6 05/13/09

0.5 05/27/09 < 0.5 06/10/09 < 0.5 06/24/09 < 0.6 07/08/09

0.6 07/22/09 < 0.5 08/05/09 < 0.4 08/19/09 < 0.7 09/02/09 < 0.6 09/16/09 < 0.7 09/30/09

0.6 10/14/09 < 0.4 10/28/09 < 0.6 11/25/09 < 0.5 12/30/09 < 0.8 MEAN C-17

i - m - m - - m - m - m - m m TABLE C-VtIi.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 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 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-1 16 ** 01/28/09 < 37 1260 +/- 116 <4 <5 *12 <4 < 11 <5 <8 <4 <4 < 24 <5 < 36 02/25/09 < 53 1160 +/- 148 <6 <6 < 14 <5 < 13 <7 < 10 <5 <7 < 26 <8 < 40 03/25/09 < 38 1130 +/- 118 < 5 <5 < 11 <6 < 12 <5 <9 <4 <5 < 24 <7 < 30 04/29/09 < 46 1280 +/- 124 <5 <5 < 10 <4 <9 <5 <9 <5 <6 < 32 < 11 < 35 05/13/09 < 56 1280 +/- 140 <6 <6 < 17 <7 < 15 <7 < 11 <5 <6 < 43 <9 < 42 05/27/09 < 40 1140 +/- 117 < 5 <6 < 11 <5 < 11 <6 <9 <4 <5 < 31 < 10 < 39 06/10/09 < 41 1250 +/- 129 < 6 <6 <13 <7 < 11 <6 < 10 <5 <6 < 24 <6 < 35 06/24/09 < 13 1110 +/- 36 <1 <2 <4 <1 <3 <2 <3 <1 <1 <14 <4 < 10 07/08/09 < 58 1080 +/- 149 < 6 <6 <18 <5 < 15 <7 < 13 <7 <8 < 32 < 12 < 49 00 07/22/09 < 41 1360 +/- 124 <5 <4 < 10 <6 <12 <5 < 10 <4 <5 < 24 <6 < 37 08/05/09 <41 1260 +/- 90 <4 <5 < 11 <5 < 11 <6 <8 <4 <5 < 29 < 10 < 31 08/19/09 < 66 1310 +/- 166 < 6 <7 < 17 <8 < 18 <8 < 10 <7 <6 < 33 <9 < 50 09/02/09 < 34 1320 +/- 97 < 4 <4 < 10 <4 <9 <5 <8 <4 <4 < 23 <7 < 34 09/16/09

62 1450 +/- 146 < 6 <7 <15 <7 < 15 <8 < 11 <5 <7 < 34 <8 < 56 09/30/09 < 57 1140 +/- 129 < 6 <6 < 16 <6 <13 <7 < 12 <5 <7 < 33 <6 < 52 10/14/09 < 61 1130 +/- 148 <7 <7 < 16 <8 < 18 <7 < 12 <7 <8 < 32 < 10 < 56 10/28/09

56 1380 +/- 140 < 6 <7 < 16 <7 < 16 <8 < 12 <6 <7 < 47 *15 < 41 11/25/09 < 69 1360 +/- 152 < 7 <6 < 14 <6 < 14 <8

13 <6 <6 < 47 < 12 < 50 12/30/09 < 35 1210 +/- 84 < 4 <4 < 10 <4 < 7' <4 <7 <3 <4 < 34 < 12 < 28 MEAN 1243 +/- 212

- INDICATES CONTROL STATION

m -= m - - - = = = = m m m TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 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 Ce-144 PERIOD CL-114 cabbage 06/24/09 256 +/- 168 6590 +/- 695 < 26 < 30 < 57 < 24 < 67 < 30 < 49 < 42 < 29 < 29 < 134 < 36 < 164 lettuce 06/24/09 247 +/- 94 3990 +/- 334 < 11 < 7 < 25 < 12 < 18 < 10 < 13 < 15 <9 < 9 < 44 < 12 < 54 swiss chard 06/24/09 305 +/- 126 8880 +/- 521 < 11 < 15 < 33 < 15 < 37 < 14 < 27 < 23 <13 < 16 < 59 < 13 < 78 cabbage 07/29/09 215 +/- 48 2880 +/- 107 < 3 <4 < 10 <3 <8 < 4 < 8 < 41 <3 < 4 < 54 < 14 < 25 lettuce 07/29/09 298 +/- 90 6710 +/- 205 < 4 < 5 < 13 <4 <10 < 5 < 9 < 56 <4 < 4 < 73 < 18 < 52 swiss chard 07/29/09 393 +/- 72 8240 +/- 213 < 6 < 7 < 18 <6 <15 < 7 < 13 < 53 <5 < 6 < 80 < 19 < 29 cabbage 08/26/09 636 +/- 204 3520 +/- 595 < 31 < 35 < 71 < 35 < 75 < 35 < 60 < 52 < 28 < 28 < 154 < 54 < 171 lettuce 08/26/09 1160 +/- 335 10300 +/- 699 < 27 < 27 < 59 < 25 < 59 < 31 < 45 < 53 < 26 < 25 < 156 < 43 < 236 swiss chard 08/26/09 239 +/- 168 7290 +/- 625 < 21 < 22 < 42 < 24 < 50 < 31 < 47 < 48 < 21 < 25 < 132 < 38 < 157 broadleaf 09/30/09 970 +/- 129 7580 +/- 302 < 12 < 13 < 31 < 12 <25 < 14 < 23 < 58 < 11 < 12 < 105 < 28 < 79 cabbage 09/30/09 < 46 2760 +/- 114 < 5 < 5 < 13 <5 <11 < 6 < 10 < 23 < 5 < 5 < 45 < 12 < 37 sswiss chard 09/30/09 123 +/- 40 5690 +/- 159 < 6 < 6 < 18 <6 <15 < 7 < 12 < 25 < 5 < 6 < 47 < 13 < 34 MEAN 440 +/- 676 6203 +/- 4930 - - -

CL-115 cabbage 06/24/09 156 +/- 108 4380 +/- 401 < 16 < 16 < 31 < 20 < 34 < 16 < 27 < 30 < 13 < 18 < 65 < 19 < 99 lettuce 06/24/09 1050 +/- 194 5570 +/- 553 < 22 < 21 < 55 < 22 < 54 < 25 < 37 < 37 <19 < 25 < 102 < 21 < 148 swiss chard 06/24/09 776 +/- 157 6620 +/- 467 < 18 < 16 < 47 < 20 < 42 < 18 < 30 < 30 < 16 < 17 < 93 < 24 < 103 cabbage 07/29/09 < 344 3460 +/- 617 < 29 < 37 < 91 < 26 < 80 < 46 < 59 < 50 < 25 < 28 < 539 < 125 < 196 lettuce 07/29/09 445 +/- 93 3660 +/- 182 < 5 < 6 < 13 <5 <10 < 6 < 10 < 54 < 4 < 5 < 74 < 21 < 28 swiss chard 07/29/09 1200 +/- 119 6860 +/- 240 < 5 < 6 < 15 <5 <11 < 6 < 11 < 60 < 5 < 6 < 80 < 21 < 35 cabbage 08/26/09 341 +/- 163 3260 +/- 362 < 16 < 18 < 28 < 19 < 40 < 20 < 23 < 30 < 16 < 18 < 89 < 24 < 104 lettuce 08/26/09 1770 +/- 270 4160 +/- 458 < 24 < 29 < 52 < 27 < 57 < 32 < 46 < 52 < 22 < 26 < 127 < 27 < 177 swiss chard 08/26/09 483 +/- 204 6380 +/- 545 < 24 < 28 < 47 < 27 < 61 < 34 < 47 < 51 < 27 < 27 < 129 < 44 < 156 cabbage 09/30/09 216 +/- 44 2690 +/- 108 < 4 < 5 < 12 <4 <11 < 6 < 9 < 22 < 4 < 5 < 41 < 11 < 30 lettuce 09/30/09 3430 +/- 310 3800 +/- 381 < 11 < 12 < 23 < 11 < 22 < 13 < 20 < 53 < 10 < 13 < 105 < 28 < 70 swiss chard 09/30/09 292 +/- 80 6670 +/- 205 < 8 < 8 < 22 <8 <20 < 9 < 15 < 37 < 7 < 8 < 71 < 18 < 54 MEAN 924 +/- 1935 4793 +/- 3054

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

- r nmm m -

TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 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 Ce-144 PERIOD CL-117 cabbage 06/24/09 178 +/- 72 3890 +/- 261 < 7 <7 < 18 <8 <16 <8 <11 <14 <6 <8 <37 <7 < 49 lettuce 06/24/09 834 +/- 189 4620 +/- 506 < 16 < 17 < 36 < 18 <43 < 18 < 32 < 30 < 16 < 19 < 84 < 29 < 108 swiss chard 06/24/09 555 +/- 156 7900 +/- 595 < 21 < 18 < 49 < 22 < 41 < 18 < 36 < 34 < 17 < 19 < 78 < 21 < 115 cabbage 07/29/09 381 +/- 61 2970 +/- 134 <4 <4 < 10 <3 <8 <4 < 7 < 41 < 3 < 4 < 56 < 12 < 23 lettuce 07/29/09 511 +/- 70 4480 +/- 163 < 4 <4 < 12 <4 <9 <5 <9 <51 <4 <4 <68 <18 < 24 swiss chard 07/29/09 620 +/- 72 7640 +/- 169 < 5 <5 < 14 <5 < 11 < 6 < 10 < 57 < 4 < 5 < 77 < 20 < 30 cabbage 08/26/09 .234 +/- 79 2210 +/- 215 < 8 <9 < 20 < 10 < 21 < 9 < 15 < 18 < 9 < 9 < 49 < 12 < 61 lettuce 08/26/09 1610 +/- 531 7070 +/- 1020 < 24 < 24 < 51 < 26 <49 < 18 < 33 < 51 < 16 < 22 < 131 < 28 < 142 swiss chard 08/26/09 591 +/- 216 7910 +/- 619 < 22 < 23 < 67 < 33 < 71 < 34 < 40 < 51 < 23 < 27 < 146 < 45 < 157 corn Leaves 09/30/09 203 +/- 35 2920 +/- 102 <4 <4 < 11 <4 <9 <4 < 8 < 19 < 3 < 4 < 36 < 9 < 26 Lettuce 09/30/09 2620 +/- 149 4720 +/- 227 < 8 < 9 < 21 <8 < 18 < 10 < 17 < 55 < 8 < 8 < 87 < 22 < 66 swiss chard 09/30/09 362 +/- 88 8210 +/- 208 <8 < 9 < 22 <8 < 19 < 9 < 16 < 41 < 7 < 8 < 74 < 21 < 55 MEAN 725 +/- 1421 5378 +/- 4459 CL-118 cabbage 06/24/09 216 +/- 86 3430 +/- 300 < 11 < 11 < 25 <9 < 26 < 12 < 19 < 21 < 10 < 13 < 48 < 14 < 72 lettuce 06/24/09 982 +/- 267 6120 +/- 758 < 31 < 29 < 71 < 28 <79 < 31 < 49 < 43 < 26 < 32 < 128 < 33 < 202 swiss chard 06/24/09 906 +/- 154 8730 +/- 504 < 18 < 18 < 46 < 19 <49 < 18 < 32 < 31 < 16 < 20 < 84 < 22 < 106 cabbage 07/29/09 527 +/- 206 3270 +/- 315 < 15 < 21 < 47 < 14 < 32 < 21 < 33 < 58 < 13 < 17 < 350 < 96 < 97 lettuce 07/29/09 573 +/- 79 5520 +/- 169 < 5 < 6 < 15 <6 < 12 < 6 < 11 < 56 < 4 < 5 < 80 < 22 < 26 swiss chard 07/29/09 1180 +/- 329 10400 +/- 621 < 28 < 35 < 102 < 26 < 69 < 42 < 59 < 55 < 25 < 27 < 601 < 141 < 168 cabbage 08/26/09 393 +/- 109 3900 +/- 296 < 14 < 13 < 27 < 15 < 32 < 15 < 24 < 24 < 11 < 15 < 69 < 19 < 90 lettuce 08/26/09 1770 +/- 275 7210 +/- 592 < 21 < 23 < 51 < 23 <43 < 23 < 46 < 46 < 23 < 24 < 119 < 31 < 152 swiss chard 08/26/09 713 +/- 247 8570 +/- 752 < 32 < 33 < 75 < 33 < 73 < 32 < 48 < 56 < 27 < 30' < 149 < 46 < 179 corn leaves 09/30/09 2110 +/- 165 3210 +/- 246 < 10 < 11 < 25 < 10 < 19 < 12 < 18 < 53 < 9 < 10 < 96 < 26 < 64 soybeans 09/30/09 330 +/- 43 3530 +/- 118 < 5 < 5 < 13 <5 < 12 < 6 < 9 < 25 < 4 < 5 < 43 < 13 < 27 swiss chard 09/30/09 547 +/- 106 9080 +/- 279 <9 < 10 < 26 <9 < 21 < 10 < 18 < 50 < 8 < 8 < 92 < 22 < 53 MEAN 854 +/- 1166 6081 +/- 5288

m m m m- - m m m m m m m m m m m TABLE C-IX.2 CONCENTRATIONS OF GAMMA EMITTERS IN GRASS SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 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 Ce-144 PERIOD CL-01 05/06/09 2420 +/- 78 4650 +/- 105 < 2 <2 <6 <2 <4 <2 <4 <52 <1 <2 <49 <11 <12 05/20/09 2140 +/- 101 6050 +/- 171 <5 < 6 < 16 < 5 < 12 <6 < 11 < 50 < 5 < 4 < 74 < 16 < 34 06/03/09 813 +/- 183 3110 +/- 334 < 16 < 16 < 34 < 16 < 34 < 16 < 27 < 54 < 14 < 13 < 109 < 25 < 102 06/17/09 1950 +/- 274 4900 +/- 435 < 16 < 17 < 46 < 18 < 43 < 19 < 33 < 54 < 19 < 19 < 115 < 33 < 119 07/01/09 2760 +/- 280 7420 +/- 528 < 15 < 17 < 38 < 17 < 39 < 18 < 33 < 56 < 17 < 16 < 113 < 29 < 111 07/15/09 2240 +/- 270 4100 +/- 429 < 18 < 22 < 50 < 18 < 45 < 21 < 35 < 49 < 17 < 18 < 122 < 29 < 135 07/29/09 1460 +/- 117 4250 +/- 215 < 5 <6 < 16 < 6 < 12 < 6 < 11 <49 <4 < 5 < 77 < 24 < 28 08/12/09 2350 +/- 136 5920 +/- 223 < 8 <9 < 22 < 8 <20 < 10 < 16 < 52 < 7 < 8 < 85 < 21 < 51 08/26/09 2380 +/- 341 5940 +/- 583 < 26 < 24 < 58 < 27 < 59 <26 <46 < 48 < 22 < 27 < 135 < 26 < 172 09/09/09 1990 +/- 249 5670 +/- 504 < 13 < 12 < 40 < 16 < 30 < 16 < 31 < 50 < 13 < 11 < 103 < 25 < 99 09/23/09 1530 +/- 276 5020 +/- 529 < 27 < 25 < 63 < 33 < 56 < 29 < 46 < 51 < 25 < 30 < 134 < 46 < 161 10/07/09 2730 +/- 326 7080 +/- 643 < 28 < 28 < 67 < 24 < 59 < 28 < 52 < 49 < 26 < 28 < 136 < 31 < 196 10/21/09 8300 +/- 550 7170 +/- 693 < 30 < 30 < 73 < 29 < 73 < 31 < 55 < 50 < 27 < 32 < 154 < 47 < 217 MEAN 2543 +/- 3624 5483 +/- 2596 -

CL-02 05/06/09 1980 +/- 83 5740 +/- 141 <2 <2 <7 <2 <5 <2 <4 <58 <2 <2 <48 <14 <11 05/20/09 5440 +/- 187 6540 +/- 232 < 5 <6 <14 <5 <11 <6 <10 <49 <4 <5 <62 <19 <28 06/03/09 1940 +/- 239 3830 +/- 329 < 7 <6 < 14 < 8 < 17 < 8 < 11 <23 < 6 < 8 < 50 < 10 < 52 06/17/09 3010 +/- 138 6130 +/- 238 <9 < 10 < 23 < 9 < 22 < 11 < 17 <28 < 9 < 10 < 62 < 14 < 67 07/01/09 2960 +/- 324 7600 +/- 500 < 15 < 15 < 41 < 14 < 33 < 13 < 28 < 51 < 13 < 15 < 104 < 25 < 91 07/15/09 2650 +/- 308 6510 +/- 595 < 25 < 25 < 57 < 21 < 44 < 25 < 46 < 59 < 21 < 23 < 140 < 44 < 137 07/29/09 2510 +/- 189 5950 +/- 265 <6 < 7 < 15 < 5 < 12 < 7 < 13 < 58 < 5 < 6 < 86 < 21 < 33 08/12/09 2290 +/- 146 8060 +/- 254 <9 < 11 < 26 < 9 < 23 < 11 < 19 < 56 < 9 < 10 < 100 < 25 < 58 08/26/09 4040 +/- 412 8040 +/- 709 < 33 < 27 < 80 < 39 < 82 < 31 < 55 < 59 < 27 < 28 < 175 < 50 < 213 09/09/09 3210 +/- 322 4600 +/- 466 < 15 < 15 < 31 < 20 < 41 < 18 < 28 < 59 < 16 < 15 < 121 < 31 < 96 09/23/09 1800 +/- 257 7400 +/- 605 < 26 < 23 < 55 < 23 < 67 < 24 < 42 < 41 < 23 < 26 < 111 < 36 < 153 10/07/09 3850 +/- 393 8670 +/- 703 < 31 < 31 < 61 < 31 < 63 < 31 < 49 < 58 < 30 < 30 < 147 < 30 < 201 10/21/09 4960 +/- 427 6900 +/- 690 < 30 < 29 < 62 , < 23 < 70 < 34 < 64 < 59 < 29 < 29 < 160 < 35 < 182 MEAN 3126 +/- 2303 6613 +/- 2786 -

m - m mmmmm m m m .m m TABLE C-IX.2 CONCENTRATIONS OF GAMMA EMITTERS IN GRASS SAMPLES COLLECTED INTHE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 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 Ce-144 PERIOD CL-08 05/06/09 1170 +/- 66 5360 +/- 126 < 2 < 2 <6 < 2 <5 < 3 < 5 < 57 < 2 < 2 < 51 < 11 < 11 05/20/09 1360 +/- 87 5320 +/- 154 < 6 < 7 < 19 < 6 < 14 < 8 < 12 < 59 < 5 < 6 < 83 < 23 < 37 06/03/09 848 +/- 194 3930 +/- 402 < 11 < 10 < 25 < 13 < 26 < 12 < 19 < 33 < 9 < 14 < 73 < 20 < 77 06/17/09 2100 +/- 145 8460 +/- 309 < 11 < 12 < 30 < 11 < 28 < 13 < 22 < 30 < 10 < 11 < 72 < 18 < 76 07/01/09 1930 +/- 223 7010 +/- 435 < 16 < 16 < 36 < 19 < 37 < 17 < 27 < 47 < 15 < 16 < 108 < 26 < 97 07/15/09 1790 +/- 258 6070 +/- 475 < 19 < 17 < 50 < 23 < 44 < 20 < 37 < 49 < 17 < 19 < 113 < 28 < 122 07/29/09 2050 +/- 109 4460 +/- 182 < 5 < 5 < 14 < 6 < 11 < 6 < 9 <47 < 4 < 5 < 71 < 20 < 26 08/12/09 2640 +/- 179 8020 +/- 267 < 9 < 9 <23 < 8 < 20 < 10 < 18 < 54 < 8 < 9 < 99 < 24 < 55 08/26/09 5930 +/- 419 8490 +/- 686 < 28 < 30 < 58 < 23 < 62 < 29 < 50 < 58 < 29 < 27 < 141 < 43 < 201 n- 09/09/09 1140 +/- 209 4330 +/- 563 < 13 < 17 < 35 < 15 < 38 < 17 < 26 < 51 < 14 < 15 < 116 < 27 < 86 09/23/09 2770 +/- 260 6260 +/- 434 < 20 < 22 < 44 < 17 < 48 < 26 < 38 < 43 < 22 < 21 < 104 < 30 < 169 10/07/09 4630 +/- 337 4290 +/- 514 < 23 < 24 < 45 < 21 < 47 < 26 < 43 < 42 < 23 < 25 < 114 < 33 < 151 10/21/09 2620 +/- 357 6970 +/- 642 < 29 < 24 < 52 < 30 < 62 < 24 < 42 < 47 < 24 < 28 < 116 < 36 < 166 MEAN 2383 +/- 2891 6075 +/- 3242 -

CL-116 05/06/09 1750 +/- 86 5530 +/- 133 <2 < 3 < 8 < 2 <6 < 3 <5 < 59 < 2 < 2 <62 < 19 < 13 05/20/09 1840 +/- 92 5750 +/- 166 < 5 <6 < 16 <6 < 13 <7 < 11 <55 < 5 < 5 <74 <20 <33 06/03/09 1430 +/- 177 3500 +/- 306 < 14 < 16 < 34 < 16 < 35 < 15 < 28 < 46 < 14 < 15 < 111 < 26 < 83 06/17/09 2070 +/- 142 6700 +/- 278 < 10 < 10 < 23 < 9 < 20 < 10 < 19 < 33 < 9 < 10 < 71 < 17 < 83 07/01/09 2220 +/- 241 7550 +/- 473 < 18 < 17 < 42 < 19 < 39 < 18 < 30 < 58 < 15 < 18 < 116 < 31 < 106 07/15/09 3390 +/- 278 7860 +/- 457 < 22 < 22 < 51 < 22 < 49 < 25 < 38 < 54 < 20 < 21 < 134 < 36 < 124 07/29/09 1570 +/- 107 8360 +/- 238 < 6 < 7 < 17 < 6 < 13 <7 < 12 < 59 <5 < 5 < 83 < 23 < 34 08/12/09 2340 +/- 116 5290 +/- 189 < 8 < 9 <22 < 8 < 18 < 9 < 16 <47 < 7 < 8 < 82 < 23 < 48 08/26/09 1970 +/- 227 6060 +/- 493 < 21 < 22 < 47 < 22 < 40 < 20 < 35 < 38 < 18 < 21 < 97 < 24 < 117 09/09/09 1940 +/- 241 6850 +/- 476 < 17 < 18 < 41 < 15 < 36 < 15 < 29 < 54 < 14 < 14 < 113 < 35 < 93 09/23/09 1440 +/- 284 8090 +/- 544 < 27 < 27 < 51 < 28 < 62 < 30 < 47 < 45 < 25 .< 25 < 124 < 38 < 160 10/07/09 1780 +/- 252 6770 +/- 582 < 25 < 28 < 55 < 24 < 61 < 24 < 47 < 42 < 23 < 27 < 123 < 34 < 155 10/21/09 4590 +/- 479 8340 +/- 725 < 29 < 32 < 58 < 31 < 62 < 31 < 54 < 54 < 27 < 29 < 148 < 38 < 191 MEAN 2179 +/- 1766 6665 +/- 2850

TABLE C-X.1 QUARTERLY TLD RESULTS FOR CLINTON POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/-2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

CL-01 18.1 +/- 3.6 17.0 +/- 0.9 16.7 +/- 2.5 20.7 +/- 2.1 18.1 +/- 1.2 CL-02 19.3 +/- 3.7 19.5 +/- 2.4 17.2 +/- 1.3 21.7 +/- 2.8 18.8 +/- 1.1 CL-03 18.2 +/- 1.6 18.0 +/- 2.9 17.4 +/- 0.7 19.3 +/- 1.3 17.9 +/- 1.2 CL-04 18.5 +/- 2.1 18.6 +/- 1.3 17.0 +/- 1.8 19.4 +/- 1.7 19.0 +/- 2.7 CL-05 19.2 +/- 2.2 18.8 +/- 2.5 17.8 +/- 1.8 20.4 +/- 2.8 19.6 +/- 1.4 CL-06 16.8 +/- 2.7 15.8 +/- 1.1 15.5 +/- 1.5 18.1 +/- 2.5 17.9 +/- 2.1 CL-07 17.7 +/- 4.0 17.7 +/- 2.6 15.0 +/- 0.9 19.9 +/- 1.8 18.0 +/- 1.3 CL-08 18.6 +/- 3.8 17.5 +/- 2.0 16.5 +/- 1.0 19.7 +/- 1.7 20.6 +/- 2.0 CL-11 17.9 +/- 2.4 17.9 +/- 0.8 16.2 +/- 1.4 19.1 +/- 1.1 18.3 +/- 2.3 CL-15 16.6 +/- 4.0 16.4 +/- 2.5 14.5 +/- 1.0 19.3 +/- 2.0 16.2 +/- 1.2 CL-22 18.7 +/- 1.7 19.1 +/- 3.3 17.5 +/- 0.7 19.3 +/- 0.9 19.0 +/- 0.5 CL-23 19.3 +/- 2.0 19.6 +/- 2.8 17.8 +/- 2.1 20.0 +/- 3.2 19.6 +/- 2.7 CL-24 18.5 +/- 2.0 17.6 +/- 0.9 17.7 +/- 3.0 19.7 +/- 0.7 18.8 +/- 1.3 CL-33 19.7 +/- 3.2 19.8 +/- 0.8 17.4 +/- 1.9 21.2 +/- 5.1 20.2 +/- 1.2 CL-34 19.6 +/- 3.9 18.0 +/- 3.5 18.1 +/- 1.7 22.1 +/- 2.2 20.1 +/- 1.5 CL-35 18.2 +/- 3.0 18.3 +/- 1.2 16.0 +/- 1.8 19.0 +/- 3.0 19.3 +/- 2.2 CL-36 18.7 +/- 4.6 18.5 +/- 0.7 15.9 +/- 1.6 21.5 +/- 2.5 18.7 +/- 1.9 CL-37 18.1 +/- 1.9 18.2 +/- 2.5 17.2 +/- 1.7 19.4 +/- 2.4 17.7 +/- 2.6 CL-41 19.6 +/- 3.9 19.3 +/- 3.0 17.9 +/- 1.2 22.4 +/- 2.2 18.9 +/- 2.0 CL-42 18.5 +/- 3.6 18.2 +/- 1.0 16.8 +/- 1.3 21.0 +/- 2.1 18.0 +/- 2.6 CL-43 20.5 +/- 5.9 18.5 +/- 2.4 18.0 +/- 0.9 24.5 +/- 1.8 21.0 +/- 3.3 CL-44 18.9 +/- 4.4 17.0 +/- 0.8 17.9 +/- 1.4 22.0 +/- 1.4 18.5 +/- 2.3 CL-45 20.1 +/- 4.1 20.4 +/- 1.6 17.3 +/- 1.3 22.3 +/- 2.3 20.4 +/- 1.7 CL-46 16.5 +/- 3.6 16.2 +/- 1.5 14.3 +/- 1.1 18.7 +/- 2.1 16.9 +/- 1.4 CL-47 19.1 +/- 2.9 20.0 +/- 2.7 17.0 +/- 1.7 20.2 +/- 1.9 19.1 +/- 1.1 CL-48 19.1 +/- 3.7 19.3 +/- 1.8 16.4 +/- 1.4 20.4 +/- 1.5 20.1 +/- 2.9 CL-49 19.6 +/- 3.9 19.5 +/- 3.7 17.1 +/- 0.9 21.9 +/- 1.5 19.8 +/- 2.2 CL-51 18.9 +/- 4.0 18.0 +/- 2.0 17.1 +/- 1.5 21.7 +/- 0.8 18.9 +/- 1.8 CL-52 19.0 +/- 3.8 18.3 +/- 3.0 16.9 +/- 1.2 19.3 +/- 0.9 21.4 +/- 2.2 CL-53 18.6 +/- 4.0 18.4 +/- 3.5 15.8 +/- 0.8 20.3 +/- 3.2 19.7 +/- 1.8 CL-54 19.4 +/- 3.3 19.9 +/- 2.7 17.0 +/- 1.5 20.8 +/- 2.4 19.8 +/- 1.0 CL-55 18.8 +/- 2.0 19.5 +/- 0.8 17.3 +/- 1.8 19.0 +/- 0.9 19.3 +/- 0.6 CL-56 19.8 +/- 3.8 19.7 +/- 1.8 17.2 +/- 0.7 21.0 +/- 3.6 21.4 +/- 2.0 CL-57 19.3 +/- 2.5 19.1 +/- 0.7 17.6 +/- 1.4 20.2 +/- 1.3 20.2 +/- 1.4 CL-58 17.2 +/- 5.2 18.8 +/- 1.5 17.2 +/- 1.0 (1) 19.2 +/- 1.9 CL-60 19.7 +/- 4.0 19.7 +/- 1.1 17.0 +/- 1.2 21.9,+/- 3.5 20.0 +/- 3.2 CL-61 18.8 +/- 3.1 19.7 +/- 1.8 16.5 +/- 1.0 19.6 +/- 1.4 19.3 +/- 1.6 CL-63 16.7 +/- 2.7 16.8 +/- 0.5 14.9 +/- 0.9 18.1 +/- 2.3 17.1 +/- 1.6 CL-64 19.0 +/- 3.6 20.9 +/- 1.4 16.8 +/- 1.8 20.0 +/- 2.1 18.4 +/- 1.3 CL-65 19.3 +/- 2.4 19.4 +/- 1.8 17.8 +/- 1.9 20.7 +/- 1.2 19.3 +/- 1.5 CL-74 16.8 +/- 2.3 16.7 +/- 1.2 15.2 +/- 1.6 17.8 +/- 2.9 17.3 +/- 0.8 CL-75 17.8 +/- 3.2 18.7 +/- 1.4 15.4 +/- 3.1 18.7 +/- 0.8 18.3 +/- 0.6 CL-76 19.5 +/- 4.2 20.1 +/- 1.7 16.7 +/- 0.8 21.7 +/- 1.6 19.4 +/- 2.9 CL-77 17.8 +/- 2.6 16.8 +/- 1.4 16.8 +/- 1.2 18.1 +/- 1.1 19.5 +/- 2.3 CL-78 18.7 +/- 1.9 19.1 +/- 1.6 17.4 +/- 1.0 23.1 +/- 2.5 (1) 19.7 +/- 1.4 CL-79 18.5 +/- 3.9 17.5 +/- 1.3 16.4 +/- 1.1 20.8 +/- 1.5 19.3 +/- 2.6 CL-80 18.9 +/- 3.3 19.3 +/- 1.5 16.5 +/- 1.9 20.3 +/- 1.6 19.4 +/- 2.3 CL-81 18.6 +/- 3.2 17.7 +/- 3.0 17.1 +/- 1.5 20.8 +/- 2.8 18.7 +/- 2.8 CL-84 19.2 +/- 4.0 19.0 +/- 1.3 17.0 +/- 1.9 21.9 +/- 2.5 19.0 +/- 1.1 CL-90 16.5 +/- 3.1 16.0 +/- 1.5 14.5 +/- 1.4 17.7 +/- 1.8 17,7 +/- 4.0 CL-91 17.3 +/- 4.1 15.7 +/- 0.7 15.7 +/- 1.1 20.0 +/- 1.2 17.7 +/- 2.3 CL-97 19.5 +/- 2.3 19.4 +/- 3.9 18.1 +/- 2.4 20.9 +/- 1.5 19.6 +/- 1.0 CL-99 15.6 +/- 2.5 15.7 +/- 2.1 13.8 +/- 1.1 16.2 +/- 0.7 16.6 +/- 0.4 CL-114 18.5 +/- 2.9 18.2 +/- 3.1 16.6 +/- 1.8 19.9 +/- 2.9 19.2 +/- 2.5 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-23

TABLE C-X.1 QUARTERLY TLD RESULTS FOR CLINTON POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

CL-05MM 18.2 +/- 3.4 17.0 +/- 2.3 16.6 +/- 0.7 20.3 +/- 3.4 18.7 +/- 1.7 CL-46MM 19.2 +/- 3.0 20.0 +/- 0.9 17.1 +/- 1.4 20.4 +/- 1.9 19.4 +/- 1.1 CL-47MM 18.8 +/- 3.7 20.3 +/- 1.1 16.1 +/- 1.3 19.3 +/- 1.5 19.5 +/- 0.6 CL-58MM 19.0 +/- 3.6 18.5 +/- 1.3 16.7 +/- 2.3 20.6 +/- 2.2 20.2 +/- 1.7

- SEE PAGE 11, SECTION E FOR EXPLANATION COMPARISON OF STATIONS CL-05, CL-46, CL-47 AND CL-58 AND CORRESPONDING MM SAMPLES STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

CL-05 19.2 +/- 2.2 18.8 +/- 2.5 17.8 +/- 1.8 20.4 +/- 2.8 19.6 +/- 1.4 CL-05MM 19.6 +/- 3.4 21.4 +/- 0.9 18.4 +/- 1.2 20.7 +/- 0.7 17.9 +/- 1.3 CL-46 16.5 +/- 3.6 16.2 +/- 1.5 14.3 +/- 1.1 18.7 +/- 2.1 16.9 +/- 1.4 CL-46MM 20.0 +/- 3.1 22.1 +/- 2.4 18.8 +/- 1.6 20.1 +/- 1.1 18.8 +/- 1.7 CL-47 19.1 +/- 2.9 20.0 +/- 2.7 17.0 +/- 1.7 20.2 +/- 1.9 19.1 +/- 1.1 CL-47MM 19.8 +/- 4.0 22.0 +/- 1.5 18.1 +/- 1.3 21.0 +/- 1.4 18.2 +/- 1.6 CL-58 17.2 +/- 5.2 18.8 +/- 1.5 17.2 +/- 1.0 (1) 19.2 +/- 1.9 CL-58MM 19.2 +/- 2.6 20.8 +/- 1.7 18.1 +/- 0.8 19.6 +/- 0.9 18.1 +/- 0.8 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-24

TABLE C-X.2 MEAN QUARTLY TLD RESULTS FOR THE INNER RING, OUTER RING, SPECIAL INTEREST, SUPPLEMENTAL AND CONTROL LOCATIONS FOR CLINTON POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION INNER RING OUTER RING SPECIAL INTEREST SUPPLEMENTAL CONTROL PERIOD +/-2 S.D.

JAN-MAR 18.3 +/- 2.4 18.9 +/- 1.9 19.0 +/- 2.6 17.7 +/- 3.0 17.9 APR-JUN 16.9 +/- 2.3 16.9 +/- 0.9 16.8 +/- 2.2 16.2 +/- 2.6 16.2 JUL-SEP 20.6 +/- 3.2 20.6 +/- 2.5 20.1 +/- 3.3 19.7 +/- 3.1 19.1 OCT-DEC 19.0 +/- 2.3 19.7 +/- 1.5 18.5 +/- 1.8 18.5 +/- 2.5 18.3 TABLE C-X.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR CLINTON POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN PRE-OP MEAN, ANALYZED MINIMUM MAXIMUM +/-2 S.D. +/- 2 S.D., ALL LOCATIONS INNER RING 64 14.3 24.5 18.7 +/- 3.7 OUTER RING 63 15.8 23.1 19.0 +/- 3.3 18 +/- 2.4 SPECIAL INTEREST 28 15.2 22.4 18.6 +/- 3.4 SUPPLEMENTAL 56 13.8 21.9 18.0 +/- 3.8 CONTROL 4 16.2 19.1 17.9 +/- 2.4 INNER RING STATIONS - CL-01, CL-05, CL-22, CL-23, CL-24, CL-34, CL-35, CL-36, CL-42, CL-43, CL-44, CL-45, CL-46, CL-47, CL-48, CL-63, CL-5MM*, CL-46MM*, CL-47MM

OUTER RING STATIONS - CL-51, CL-52, CL-53, CL-54, CL-55, CL-56, CL-57, CL-58, CL-60, CL-61, CL-76, CL-77, CL-78, CL-79, CL-80, CL-81, CL-58MM*

SPECIAL INTEREST STATIONS - CL-37, CL-41, CL-49, CL-64, CL-65, CL-74, CL-75 SUPPLEMENTAL STATIONS - CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-114, CL-15, CL-33, CL-84, CL-90, CL-91, CL-97, CL-99 CONTROL STATIONS - CL-i 1

THE RESULTS FOR TLDs CL-05MM, CL-47MM, CL-58MM ARE NOT PART OF THE REMP AVERAGES. THEY ARE USED FOR COMPARISON PURPOSES ONLY.

C-25

FIGURE C-1 MEAN MONTHLY GROSS BETA CONCENTRATION IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CPS, 2009 0.052 0.047 0.042 0.037 0.032 C.,

- 0.027

_> 0.022 0.017 0.012 0.007 0.002 MONTH PRE-OP (ALL SITES)

-*-2009 INDICATOR 2009 CONTROL SEE PROGRAM EXCEPTIONS SECTION TO EXPLAIN SEPTEMBER SPIKE C-26

FIGURE C-2 MEAN QUARTERLY AMBIENT GAMMA RADIATION LEVELS (TLD) IN THE VICINITY OF CPS, 2009 50 45 40 35 E

S30 E

25 20 15 10 1st 2nd 3rd 4th QUARTER E PRE-OP 02009 indicator U2009 control C-27

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

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

March 2009 E6533-396 Milk Sr-89 pCi/L 102 97.7 1.04 A Sr-90 pCi/L 14.9 15.6 0.96 A E6534-396 Milk 1-131 pCi/L 66.7 79.3 0.84 A Ce-141 pCi/L 87.5 94.9 0.92 A Cr-51 pCi/L 275 305 0.90 A Cs-1 34 pCi/L 82.0 93.7 0.88 A Cs-1 37 pCi/L 111 111 1.00 A Co-58 pCi/L 114 119 0.96 A Mn-54 pCi/L 136 128 1.06 A Fe-59 pCi/L 112 99.9 1.12 A Zn-65 pCi/L 160 156 1.03 A Co-60 pCi/L 142 142 1.00 A E6536-396 AP Ce-141 pCi 120 115 1.04 A Cr-51 pCi 385 371 1.04 A Cs-134 pCi 113 114 0.99 A Cs-1 37 pCi 149 135 1.10 A Co-58 pCi 153 145 1.06 A Mn-54 pCi 155 155 1.00 A Fe-59 pCi 118 121 0.98 A Zn-65 pCi 195 189 1.03 A Co-60 pCi 190 173 1.10 A E6535-396 Charcoal 1-131 pCi 82.8 79.4 1.04 A June 2009 E6742-396 Milk Sr-89 pCi/L 107 112 0.96 A Sr-90 pCi/L 19.0 16.7 1.14 A E6743-396 Milk 1-131 pCi/L 98.1 102.0 0.96 A Ce-141 pCi/L 260 284 0.92 A Cr-51 pCi/L 389 400 0.97 A Cs- 134 pCi/L 144.0 166 0.87 A Cs-137 pCi/L 185 192 0.96 A Co-58 pCi/L 86.9 91.9 0.95 A Mn-54 pCi/L 133 137 0.97 A Fe-59 pCi/L 126 122 1.03 A Zn-65 pCi/L 173 175 0.99 A Co-60 pCi/L 298 312 0.96 A E6745-396 AP Ce-141 pCi 186 163 1.14 A Cr-51 pCi 262 231 1.13 A Cs-134 pCi 101 95 1.06 A Cs-137 pCi 135 il1 1.22 W Co-58 pCi 61 53 1.16 A Mn-54 pCi 83.1 79 1.05 A Fe-59 pCi 84 70 1.19 A Zn-65 pCi 137 101 1.36 N (1)

Co-60 pCi 202 180 1.12 A E6744-396 Charcoal 1-131 pCi 92.2 95.8 0.96 A D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

September 2009 E6897-396 Milk Sr-89 pCi/L 113 107 1.06 A Sr-90 pCi/L 17.4 18.8 0.93 A E6898-396 Milk 1-131 pCi/L 89.2 98.6 0.90 A Ce-141 pCi/L 249 275 0.91 A Cr-51 pCi/L 213 221 0.96 A Cs-134 pCi/L 104.0 123 0.85 A Cs-137 pCi/L 172 185 0.93 A Co-58 pCi/L 96.3 99.4 0.97 A Mn-54 pCi/L 201 206 0.98 A Fe-59 pCi/L 154 147 1.05 A Zn-65 pCi/L 213 204 1.04 A Co-60 pCi/L 154 160 0.96 A E6900-396 AP Ce-141 pCi 181 161 1.12 A Cr-51 pCi 145 130 1.12 A Cs- 134 pCi 71.8 72 0.99 A Cs-137 pCi 115 109 1.06 A Co-58 pCi 62 58 1.06 A Mn-54 pCi 129 121 1.07 A Fe-59 pCi 97 98 0.98 A Zn-65 pCi 110 120 0.92 A Co-60 pCi 98.7 94.1 1.05 A E6899-396 Charcoal 1-131 pCi 89.5 92.3 0.97 A December 2009 E6946-396 Milk Sr-89 pCi/L 131 131 1.00 A Sr-90 pCi/L 19.3 17.9 1.08 A E6947-396 Milk 1-131 pCi/L 79.2 87.3 0.91 A Ce-141 pCi/L 193 202 0.96 A Cr-51 pCi/L 512 548 0.93 A Cs-1 34 pCi/L 222 253 0.88 A Cs-137 pCi/L 163 179 0.91 A Co-58 pCi/L 200 211 0.95 A Mn-54 pCi/L 178 178 1.00 A Fe-59 pCi/L 176 178 0.99 A Zn-65 pCi/L 326 345 0.94 A Co-60 pCi/L 240 256 0.94 A E6949-396 AP Ce-141 pCi 103 103 1.00 A Cr-51 pCi 290 280 1.04 A Cs-134 pCi 116 129 0.90 A Cs-137 pCi 93.4 91.5 1.02 A Co-58 pCi 111 108 1.03 A Mn-54. pCi 81.0 90.8 0.89 A Fe-59 pCi 106 90.8 1.17 A Zn-65 pCi 155 176 0.88 A Co-60 pCi 135 131 1.03 A D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

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

December 2009 E6948-396 Charcoal 1-131 pCi 93.3 93.9 0.99 A (1) Detector 7 appearsto have a slightly high bias. Detector 7 was removed from service until it can be recalibrated. NCR 09-23 (a) Teledyne Brown Engineering reported result.

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

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

(d) Analytics evaluationbased on TBE internal QC limits: A=Acceptable. Reported result falls within ratio limits of O.80-1.20.

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

D-3

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 1)

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

April 2009 RAD 77 Water Sr-89 pCi/L 57.4 48.3 37.8 - 55.7 N (1)

Sr-90 pCi/L 30.6 31.4 22.9 - 36.4 A Ba-133 pCi/L 55.2 52.7 43.4 - 58.3 A Cs-134 pCi/L 65.8 72.9 59.5 - 80.2 A Cs-137 pCi/L 157 168 151 - 187 A Co-60 pCi/L 86.4 88.9 80.0- 100 A Zn-65 pCi/L 85.5 84.4 76.0- 101 A Gr-A pCi/L 47.7 54.2 28.3 - 67.7 A Gr-B pCi/L 45.2 43.5 29.1 - 50.8 A 1-131 pCi/L 25.2 26.1 21.7-30.8 A H-3 pCi/L 19733 20300 17800 - 22300 A October 2009 RAD 79 Water Sr-89 pCi/L 64.75 62.2 50.2 - 70.1 A Sr-90 pCi/L 30.30 30.7 22.4 - 35.6 A Ba-133 pCi/L 97.9 92.9 78.3 - 102 A Cs-134 pCi/L 76.8 79.4 65.0 - 87.3 A Cs-1 37 pCi/L 59.9 54.6 49.1 -62.9 A Co-60 pCi/L 121, 117 105- 131 A Zn-65 pCi/L 115 99.5 89.6- 119 A Gr-A pCi/L 19.6 23.2 11.6-31.1 A Gr-B pCi/L 28.5 26.0 16.2-33.9 A 1-131 pCi/L 22.1 22.2 18.4-26.5 A H-3 pCi/L 16133 16400 14300 - 18000 A (1) Calculationdid not allow for Y-90 ingrowth on the Sr-89 mount NCR 09-14 (a) Teledyne Brown Engineering reportedresult.

(b) The ERA known value is equal to 100% of the parameterpresent in the standardas determinedby gravimetric and/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 resultfalls within the Control Limits and outside of the Warning Limit.

D-4

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPý TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 2)

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

March 2009 09-MaW20 Water Cs-134 Bq/L 18.8 22.5 18.5 - 29.3 A Cs-137 Bq/L 0.0601 (1) A Co-57 Bq/L 17.0 18.9 13.2-24.6 A Co-60 Bq/L 16.1 17.21 12.05 - 22.37 A H-3 Bq/L 332 330.9 231.6 - 430.2 A Mn-54 Bq/L 13.8 14.7 10.26 - 19.06 A Sr-90 Bq/L 6.88 7.21 5.05- 9.37 A Zn-65 Bq/L 13.2 13.6 9.5- 17.7 A 09-GrW20 Water Gr-A Bq/L 0.529 0.635 >0.0 - 1.270 A Gr-B Bq/L 1.87 1.27 0.64-1.91 A 09-MaS20 Soil Cs-134 Bq/kg 433 467 327 - 607 A Cs-1 37 Bq/kg 649 605 424 - 787 A Co-57 Bq/kg -0.120 (1) A Co-60 Bq/kg 3.91 4.113 (2) A Mn-54 Bq/kg 339 307 215-399 A K-40 Bq/kg 644 570 399-741 A Sr-90 Bq/kg 245 257 180 - 334 A Zn-65 Bq/kg 272 242 169- 315 A 09-RdF20 AP Cs-134 Bq/sample 2.77 2.93 2.05 - 3.81 A Cs-1 37 Bq/sample 1.41 1.52 1.06-1.98 A Co-57 Bq/sample 1.24 1.30 0.91 - 1.69 A Co-60 Bq/sample 1.33 1.22 0.85- 1.59 A Mn-54 Bq/sample 2.42 2.2709 1.5898 - 2.9522 A Sr-90 Bq/sample 0.713 0.64 0.448 - 0.832 A Zn-65 Bq/sample 1.30 1.36 0.95- 1.77 A 09-GrF20 AP Gr-A Bq/sample 0.188 0.348 >0.0 - 0.696 A Gr-B Bq/sample 0.313 0.279 0.140 - 0.419 A March 2009 09-RdV20 Vegetation Cs-134 Bq/sample 3.48 3.40 2.38 -4.42 A Cs-137 Bq/sample 1.15 0.93 0.65-1.21 W Co-57 Bq/sample 3.12 2.36 1.65 - 3.07 N (3)

Co-60 Bq/sample -0.0105 (1) A Mn-54 Bq/sample 2.98 2.3 1.61 -2.99 W K-40 Bq/sample 64.1 (4)

Sr-90 Bq/sample 1.09 1.260 0.882 - 1.638 A Zn-65 Bq/sample 1.73 1.3540 0.948- 1.760 W September 2009 09-MaW21 Water Cs-134 Bq/L 26.5 32.2 22.5 -41.9 A Cs-1 37 Bq/L 37.2 41.2 28.8 - 53.6 A Co-57 Bq/L 32.2 36.6 25.6 - 47.6 A Co-60 Bq/L 14.0 15.40 10.8-20.0 A H-3 Bq/L 705 634.1 443.9 - 824.3 A Mn-54 Bq/L -0.1015 (1) A Sr-90 Bq/L 13.9 12.99 9.09- 16.89 A Zn-65 Bq/L 26.2 26.9 18.8- 35.0 A 09-GrW21 Water Gr-A Bq/L 1.27 1.047 >0.0 - 2.094 A Gr-B Bq/L 9.70 7.53 3.77- 11.30 A D-5

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPI TELEDYNE BROWN ENGINEERING, 2009 (PAGE 2 OF 2)

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

September 2009 09-MaS21 Soil Am-241 Bq/kg 74.7 89.8 62.9-116.7 A Cs-134 Bq/kg 0.554 (1) A Cs-137 Bq/kg 706 669 468-870 A Co-57 Bq/kg 606 586 410-762 A Co-60 Bq/kg 350 327.000 229-425 A Mn-54 Bq/kg 876 796 557-1035 A K-40 Bq/kg 425 375 263-488 A Sr-90 Bq/kg 505 455 319-592 A Zn-65 Bq/kg 1370 1178 825-1531 A 09-RdF21 AP Cs-134 Bq/sample -0.02 (1) A Cs-137 Bq/sample 1.4 1.4 0.98- 1.82 A Co-57 Bq/sample 5.98 6.48 4.54 - 8.42 A Co-60 Bq/sample 1.01 1.03 0.72-1.34 A Mn-54 Bq/sample 5.16 5.49 3.84-7.14 A Sr-90 Bq/sample 0.925 0.0835 0.585 - 1.086 A Zn-65 Bq/sample 4.39 3.93 2.75-5.11 A 09-GrF21 AP Gr-A Bq/sample 0.357 0.659 >0.0- 1.318 A Gr-B Bq/sample 1.403 1.320 0.66- 1.98 A 09-RdV21 Vegetation Cs-134 Bq/sample -0.0027 (1) A Cs-1 37 Bq/sample 2.36 2.43 1.70-3.16 A Co-60 Bq/sample 2.58 2.57 1.80 - 3.34 A Mn-54 Bq/sample 8.36 7.9 5.5 - 10.3 A K-40 Bq/sample 57.8 (4)

Sr-90 Bq/sample 1.73 1.78 1.25-2.31 A Zn-65 Bq/sample -0.59 (1) A (1) Falsepositive test.

(2) Sensativity evaluation.

(3) Homogeniety problem. MAPEP requires using entire sample but due to geometry limitations we can only use part of the sample. NCR 09-13 (4) Not evaluated by MAPEP.

(a) Teledyne Brown Engineeringreported result.

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

(c) DOEIMAPEPevaluation:A=acceptable, W=acceptable with warning,N=not acceptable.

D-6

Clinton 2009 Errata Data Section 1 of 60 APPENDIX E ERRATA DATA

Clinton 2009 Errata Data Section 2 of 60 Intentionally left blank

Clinton 2009 Errata Data Section 3 of 60 I Clinton 2009 Errata Data Section 4 of 60 I

I Docket No: 50-461 CLINTON POWER STATION IAnnual Radiological I Environmental Operating Report 1 January Through 31 December 2008 I

I Prepared By Teledyne Brown Engineering Environmental Services 3 Exelkn.

Nuclear Clinton Power Station Clinton, IL 61727 I ~April 2009 I

I 1

U

Clinton 2009 Errata Data Section 5 of 60 Table Of Contents I. Sum mary and Conclusions .............................................................................................. 1 I1.Introduction ......................................... , ...................................................................... 3 A. Objectives of the REM P .................................................................................. 3 B. Implem entation of the Objectives .................................................................. 3 11.Program Description ................................................................................................ 4 A. Sam ple Collection ......................................................................................... 4 B. Sam ple Analysis ............................................................................................ 6 C. Data Interpretation ......................................................................................... 6 D. Program Exceptions ....................................................................................... 8 E. Program Changes ......................................................................................... 9 IV. Results and Discussion ......................................................................................... 10 A. Aquatic Environm ent .................................................................................... 10

1. Surface W ater ..................................................................................... 10

2. Drinking W ater ................................................................................... 11

3. W ell W ater .......................................................................................... 12

4. Fish ..................................................................................................... 12

5. Sedim ent ............................................................................................ 12 B. Atm ospheric Environm ent ........................................................................... 13

1. Airborne .............................................................................................. 13

a. Air Particulates ......................................................................... 13

b. Airborne Iodine ...................................................................... 14

2. Terrestrial ............................................................................................ 14

a. Milk .......................................................................................... 14

b. Food Products .......................................................................... 14

c. Grass ....................................................................................... 15 C. Am bient Gam m a Radiation ........................................................................... 15 D. Land Use Survey .......................................................................................... 16 E. Summary of Results - Inter-laboratory Comparison Program ...................... 17 V. References ................................................................................................................... 19

Clinton 2009 Errata Data Section 6 of 60 Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the Clinton Power Station, 2008 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Radiological Environmental Monitoring Program - Sampling Locations, Table B-i:

Distance and Direction, Clinton Power Station, 2008 Table B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection, Clinton Power Station, 2008 Figures Figure B-i: Environmental Sampling Locations Within One Mile of the Clinton Power Station, 2008 Figure B-2: Environmental Sampling Locations Between One and Two Miles from the Clinton Power Station, 2008 Figure B-3: Environmental Sampling Locations Between Two and Five Miles from the Clinton Power Station, 2008 Figure B-4: Environmental Sampling Locations Greater Than Five Miles from the Clinton Power Station, 2008 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-1.1 Concentrations of 1-131 in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-1.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

ii

Clinton 2009 Errata Data Section 7 of 60 Table C-1.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-11.1 Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-11.2 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-11.3 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-111.1 Concentrations of Tritium in Well Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-111.2 Concentrations of Gamma Emitters in Well Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-IV.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-V. 1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-VI.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-VI.2 Monthly and Yearly Mean Values of Gross Beta Concentrations (E-3 pCi/cu meter) in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-VI.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-VII.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-VIII.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-VIII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-IX.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-IX.2 Concentrations of Gamma Emitters in Grass Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-X.1 Quarterly TLD Results for Clinton Power Station, 2008.

Table C-X.2 Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Special Interest and Control Locations for Clinton Power Station, 2008.

iii

Clinton 2009 Errata Data Section 8 of 60 Table C-X.3 Summary of the Ambient Dosimetry Program for Clinton Power Station, 2008.

Fi-gures Figure C-1 Mean Monthly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of CPS, 2008.

Figure C-2 Mean Quarterly Ambient Gamma Radiation Levels (TLD) in the Vicinity of CPS, 2008.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008 Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2008 Appendix E Annual Radiological Groundwater Protection Program Report (ARGPPR) iv

Clinton 2009 Errata Data Section 9 of 60 Summary and Conclusions This report on the Radiological Environmental Monitoring Program (REMP) conducted for the Clinton Power Station (CPS) by Exelon covers the period 1 January 2008 through 31 December 2008. During that time period, 1,578 analyses were performed on 1,462 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of CPS had no adverse radiological impact on the environment.

There were zero (0) radioactive liquid releases from CPS during 2008. Releases of gaseous radioactive materials were accurately measured in plant effluents.

There was no gaseous effluent releases that approached the limits specified in the CPS Offsite Dose Calculation Manual (ODCM). The highest calculated offsite dose received by a member of the public due to the release of gaseous effluents from Clinton Power Station was 7.45 E-04 or 0.000745 mrem.

Surface, drinking, and well water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Drinking water samples were also analyzed for concentrations of gross beta and 1-131. No fission or activation products were detected. Gross beta activities detected were consistent with those detected in previous years. No tritium activity was detected and the required lower limit of detection (LLD) was met.

Fish and shoreline sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected in fish or shoreline sediment samples.

Air particulate samples were analyzed for concentrations of gross beta and gamma emitting nuclides. Cosmogenic Be-7 was detected at levels consistent with those detected in previous years. No fission or activation products were detected.

High sensitivity 1-131 analyses were performed on weekly air samples. All required LLDs were met.

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

Concentrations of naturally occurring K-40 were consistent with those detected in previous years. No fission or activation products were found.

Food product samples were analyzed for concentrations of gross beta and gamma emitting nuclides. Gross beta activities detected were consistent with those detected in previous years. Concentrations of Cosmogenic Be-7 and naturally occurring K-40 were consistent with those detected in previous years.

No fission or activation products were detected.

Grass samples were analyzed for concentrations of gamma emitting nuclides.

Concentrations of Cosmogenic Be-7 and naturally occurring K-40 were Clinton 2009 Errata Data Section 10 of 60 consistent with those detected in previous years. No fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using thermoluminescent dosimeters. Levels detected were consistent with those observed in previous years.

Clinton 2009 Errata Data Section 1I of 60 II. Introduction The Clinton Power Station (CPS), consisting of one approximately 1140 MW gross electrical power output boiling water reactor is located in Harp Township, DeWitt County, Illinois. CPS is owned and operated by Exelon and became operational in 1987. Unit No. 1 went critical on 15 February 1987. The site encloses approximately 13,730 acres. This includes the 4,895 acre, man-made cooling lake and about 452 acres of property not owned by Exelon. The plant is situated on approximately 150 acres. The cooling water discharge flume - which discharges to the eastern arm of the lake - occupies an additional 130 acres.

Although the nuclear reactor, supporting equipment and associated electrical generation and distribution equipment lie in Harp Township, portions of the aforementioned 13,730 acre plot reside within Wilson, Rutledge, DeWitt, Creek, Nixon and Santa Anna Townships.

A Radiological Environmental Monitoring Program (REMP) for CPS was initiated in 1987. The preoperational period for most media covers the periods May 1980 through 27 February 1987 and was summarized in a separate report. This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Global Dosimetry on samples collected during the period 1 January 2008 through 31 December 2008.

A. Objectives 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.

Clinton 2009 Errata Data Section 12 of 60 III. Program Description A. Sample Collection This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the CPS REMP in 2008. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-3, Appendix B. The sampling methods used by Environmental Inc. (Midwest Labs) are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, drinking water, well water, fish, and shoreline sediment. Two gallon water samples were collected monthly from continuous samplers located at three surface water locations (CL-90, CL-91 and CL-99) and one drinking water location (CL-14). A monthly grab sample was obtained from one surface water location (CL-1 3).

Quarterly samples were obtained from two well water locations (CL-07D and CL-12). All samples were collected in new unused plastic bottles, which were rinsed at least twice with source water prior to collection. Fish samples comprising the flesh of largemouth bass, crappie, carp, bluegill and channel catfish the species most commonly harvested from the lakes by sporting fishermen, were collected semiannually at two locations, CL-19 and CL-105 (control). Shoreline sediment samples composed of recently deposited substrate were collected at one location semiannually, CL-07B.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, milk, food produce and grass. Airborne iodine and particulate samples were collected and analyzed weekly at ten locations (CL-01, CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-1 1, CL-15, and CL-94). The control location was CL-1 1. 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 filters were replaced weekly and sent to the laboratory for analysis.

Milk samples were collected biweekly at one location (CL-1 16) from May through October, and monthly from November through April to coincide with the grazing season. All samples were collected in new unused Clinton 2009 Errata Data Section 13 of 60 plastic bottles from the bulk tank at that location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected once a month from June through September at four locations (CL-114, CL-115, CL-117 and CL-118). The control location was CL-1 14. Various broadleaf vegetable samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

Grass samples were collected biweekly at four locations (CL-01, CL-02, CL-08 and CL-1 16) from May through October. The control location was CL-1 16. All samples were collected in new unused plastic bags and sent to the laboratory for analysis.

Ambient Gamma Radiation Direct radiation measurements were made using Panasonic 814 calcium sulfate (CaSO 4 ) thermoluminescent dosimeters (TLD). The TLD locations were placed around the CPS site as follows:

An inner ring consisting of 16 locations (CL-01, CL-05, CL-22, CL-23, CL-24, CL-34, CL-35, CL-36, CL-42 CL-43, CL-44, CL-45, CL-46, CL-47, CL-48 and CL-63). An additional three locations were installed as part of a volunteer comparison study near and within the site perimeter (CL-05MM, CL-46MM and CL-47MM).

An outer ring consisting of 16 locations (CL-51, CL-52, CL-53, CL-54, CL-55, CL-56, CL-57, CL-58, CL-60, CL-61, CL-76, CL-77, CL-78, CL-79, CL-80 and CL-81). CL-58MM was installed as part of a volunteer comparison study extending to approximately 5 miles from the site designed to measure possible exposures to close-in population.

A special interest set consisting of seven locations (CL-37, CL-41, CL-49, CL-64, CL65, CL-74 and CL-75) representing special interest areas.

A supplemental set consisting of 14 locations (CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-15, CL-33, CL-84, CL-90, CL-91, CL-97, CL-99, and CL-114).

CL-1 1 represents the control location for all environmental TLDs.

The specific TLD locations were determined by the following criteria:

1. The presence of relatively dense population; Clinton 2009 Errata Data Section 14 of 60

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 CPS, if any, would be most significant;

3. On hills free from local obstructions and within sight of the vents (where practical);

4. And near the closest dwelling to the HVAC and VG stacks in the prevailing downwind direction.

Two TLDs - each composed of two CaSO 4 thermoluminescent phosphors enclosed in plastic - were placed at each location in a vented PVC conduit located approximately three feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.

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 CPS REMP in 2008. 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 drinking water and air particulates.

2. Concentrations of gamma emitters in surface, drinking and well water, air particulates, milk, fish, grass, sediment and vegetables.

3. Concentrations of tritium in surface, drinking and well water.

4. Concentrations of 1-131 in air, milk, vegetables and drinking water.

5. Ambient gamma radiation levels at various on-site and off-site environs.

C. Data Interpretation The radiological and direct radiation data collected prior to CPS becoming operational was used as a baseline with which these operational data were compared. For the purpose of this report, CPS was considered operational at initial criticality. In addition, data were compared to Clinton 2009 Errata Data Section 15 of 60 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 CPS detection capabilities for environmental sample analysis.

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 resulting in a negative number. A minimum detectable concentration (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 water and well water 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137, Ba-140, La-140, and Ce-144 were reported.

For fish, sediment and milk, 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137, Ba-140, La-140, and Ce-144 were reported.

For drinking water, grass and vegetation 15 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, La-140, and Ce-144 were reported.

For air particulate 11 nuclides, Be-7, K-40, Co-60, Nb-95, Zr-95, Ru-103, Ru-106, Cs-134, Cs-137, Ce-141 and Ce-144, were reported.

Means and standard deviations of the results were calculated. The Clinton 2009 Errata Data Section 16 of 60 standard deviations represent the variability of measured results for different samples rather than single analysis uncertainty.

D. Program Exceptions The exceptions described below are those that are considered 'deviations' from the Radiological Environmental Monitoring Program as required by the Station's ODCM. By definition, 'deviations' are permitted as delineated within NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants", October 1978, and within Radiological Assessment Branch Technical Position, Revision 1, November 1979, which states.... "Deviations are permitted from the required sampling schedule if specimens are unobtainable due to hazardous conditions, seasonal unavailability, malfunction of automatic sampling equipment and other legitimate reasons".... The below section addresses the reporting requirements found within Section 7.1 of the Station's ODCM.

February 06, 2008, Issue Report IR # 732558 Non-ODCM Composite Water sampler CL-99 was found flooded during the weekly inspection. The flooding caused the compositor to fail and subsequent troubleshooting revealed the sampling diffuser had also become clogged, restricting sample flow.

February 27, 2008, IR # 741702 Environmental Air Sampler CL-03 was found not running during the performance of the weekly surveillance. Additionally, the digital timer was also found to have stopped recording run time. The malfunction was a blown fuse. The Air Sampler collected sufficient volume, therefore was analyzed and required LLDs were achieved.

May 27, 2008, IR # 779850 TLD CL-56 was found to be missing during the vendor monthly verification of ODCM TLDs. Additionally, the TLD holder container that houses the TLD was found tampered with as the bottom had been dismantled. This container housing the TLD is mounted on a metal rod driven into the ground, which was also missing. TLD CL-56 was replaced on 05/28/08 with a spare, having a result of 12.8 mRem for the rest of the monitoring period.

June 25, 2008, IR # 793454 Broadleaf vegetation was substituted for CL-114 and CL-115 due to late planting and heavy rain with flooding.

Clinton 2009 Errata Data Section 17 of 60 July 09, 2008 - July 16, 2008 IR # 797218 Environmental Air sampler CL-94 had a lengthy power interruption due to a severe thunder and lightning storm. Pressure and flow adjustments were made after power was restored. The total sample volume did not meet the minimum acceptance criteria.

July 16, 2008 - July 23, 2008 IR 799543 Environmental Air sampler CL-1 1 had a lengthy power interruption due to a severe thunder and lightning storm. Pressure and flow adjustments were made after power was restored. The total volume did not meet the minimum acceptance criteria.

December 17, 2008- December 26, 2008 IR # 860278 Environmental Air Sampler CL-06 was not sampled and analyzed due to icy conditions for the weekly surveillance. The sample was collected and analyzed after the due date as weather conditions permitted. There was no impact to the data and all LLDs were achieved.

Program exceptions were reviewed to understand the causes of the exception and to return to ODCM sample compliance before the next sampling frequency period.

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

E. Program Changes Although there were no changes to the program in 2008, during an annual NRC ODCM REMP inspection, there was an enhancement. An Inspector observed the orientation of an environmental area TLD and as an enhancement, suggested that if relocated approximately sixty (60) feet closer towards the Station, would serve better as a direct line of sight in a cleared opening, unobstructed from tree branches and leaves.

Over the twenty (20) plus years of Unit Operation, the surrounding environment consisting of tress and their branches have grown, thus challenging the guidance ANSI N545-1975, which requires TLDs should be moved as far as possible from large or dense objects that may cause directional anomalies or otherwise perturb the radiation field. Although historical reviews were performed that resulted in no anomalous data relative to the radiation field, as part of our extent of condition, all environmental TLDs were evaluated as to locations and their respective Clinton 2009 Errata Data Section 18 of 60 orientations with the following determination:

Completed:

" A review of the results from adjacent Environmental Area TLD data sectors revealed no significant patterns or variances.

An extent of condition review examined all Environmental Area TLD locations and their respective orientations and identified three (3) additional locations as candidates for additional monitoring.

Clinton Power Station has installed four (4) TLDs in close proximity to the original TLDs: CL-05MM, CL-46MM, CL-47MM and CL-58MM.

These Environmental Area TLDs located within the same meteorological sector near the four (4) locations, were measured and studied for comparison (Table C-X.1).

o Although TLDs CL-05MM, CL-47MM and CL-58MM were closer to the Station, they resulted in less exposure than the originally installed locations for all four quarters of 2008.

o TLD CL-46MM showed a slight increase for all four quarters of 2008, averaging 1.6 mRem higher than the originally installed location.

Clinton Power Station will continue this comparison study throughout 2009.

Because the TLD results from this study are not part of the ODCM REMP averages, the results are for comparison purposes only.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken hourly, and grab samples to supplement during periods of inoperability - see exceptions, from a continuous compositor at three locations (CL-90, CL-91 and CL-99) on a monthly schedule and grab samples were taken monthly from one station (CL-13). The following analyses were performed.

Clinton 2009 Errata Data Section 19 of 60 Iodine-1 31 Monthly samples from location CL-90 were analyzed for 1-131 activity (Table C-1.1, Appendix C). The required LLD was met.

Tritium Monthly samples from all locations were composited quarterly and analyzed for tritium activity (Table C-1.2, Appendix C). The required LLD was met.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-1.3, Appendix C). Naturally occurring K-40 was found in one of 12 samples at locations CL-13 and CL-90 and three of 12 samples at locations CL-99. No other nuclides were detected and all required LLDs were met.

2. Drinking Water Monthly samples were collected from a continuous compositor at one location (CL-14). The following analyses were performed:

Gross Beta Monthly samples were analyzed for concentrations of gross beta (Tables C-11.1, Appendix C). Gross beta was found in two of 12 samples. The values ranged from 1.8 to 4.1 pCi/I. Concentrations detected were consistent with those detected in previous years.

Tritium Monthly samples were composited quarterly and analyzed for tritium activity (Table C-11.2, Appendix C). The required LLD was met.

Clinton 2009 Errata Data Section 20 of 60 Gamma Spectrometry Monthly samples were analyzed for gamma emitting nuclides (Table C-11.3, Appendix C). Naturally occurring K-40 was found in one sample at location CL-14. No other nuclides were detected and all required LLDs were met.

3. Well Water Quarterly grab samples were collected at two locations (CL-7D and CL-12, consisting of CL-12R [a raw water sample from this well]

and CL-12T [same well water, but after treatment and available for consumption]). The following analyses were performed:

Tritium Samples from all locations were analyzed for tritium activity (Table C-111.1, Appendix C). The required LLD was met.

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 carp, largemouth bass, bluegill, crappie and channel catfish were collected at two locations (CL-1 9 and CL-105) semiannually. The following analysis was performed:

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

Naturally occurring K-40 was found at both stations. No fission or activation products were found. No other nuclides were detected and the required LLDs were met.

5. Shoreline Sediment Aquatic shoreline sediment samples were collected at CL-07B semiannually. The following analysis was performed:

Clinton 2009 Errata Data Section 21 of 60 Gamma Spectrometry Shoreline sediment samples were analyzed for gamma emitting nuclides (Table C-V.1, Appendix C). Naturally occurring K-40 was detected in both samples. No fission or activation products were found. No other nuclides were detected and the required LLDs were met.

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from 10 locations on a weekly basis. The 10 locations were separated into three groups: Group I represents locations within one mile of the CPS site boundary (CL-02, CL-03, CL-04, CL-06, CL-15, and CL-94). Group II represents the locations at an intermediate distance within one to five miles of CPS (CL-01, CL-07, and CL-08), and Group III represents the control location greater than five miles from CPS (CL-1 1). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-VI.1 and C-VI.2 and Figure C-1, 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 CPS. The results from the On-Site locations (Group I) ranged from 8 to 39 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3 . The results from the Intermediate Distance location (Group II) ranged from 8 to 55 E-3 pCi/m 3 with a mean of 19 E-3 pCi/m 3 . The results from the Control locations (Group Ill) ranged from 8 to 39 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m3. Comparison of the 2008 air particulate data with previous years data indicate no effects from the operation of CPS (Figure C-5, Appendix C). In addition a comparison of the weekly mean values for 2008 indicate no notable differences among the three groups.

Clinton 2009 Errata Data Section 22 of 60 Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-VI.3, Appendix C).

Naturally occurring isotopes Be-7 due to cosmic ray activity was detected in 34 samples. No other nuclides were detected and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from 10 locations (CL-01, CL-02, CL-03, CL-04, CL-06, CL-07, CL-08, CL-1 1, CL-15 and CL-94) and analyzed weekly for 1-131 (Table C-VII.l, Appendix C). All results were less than the MDC and the required LLD was met.

2. Terrestrial

a. Milk Samples were collected from CL-1 16 biweekly May through October and monthly November through April, to coincide with the grazing season. The following analyses were performed:

Iodine-131 Milk samples were analyzed for concentrations of 1-131 (Table C-VIII.1, Appendix C). The required LLD was met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides (Table C-VIII.2, Appendix C).

Naturally occurring K-40 activity was found in all samples.

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

b. Food Products Broadleaf vegetation samples and substitutes as noted in exceptions were collected from four locations (CL-1 14, CL-1 15, CL-1 17 and CL-1 18) monthly June through September, to coincide with the harvest season. The following analyses were performed:

Clinton 2009 Errata Data Section 23 of 60 Gamma Spectrometry Each food product sample, cabbage, swiss chard, lettuce, and substitutions as noted earlier were analyzed for concentrations of gamma emitting nuclides (Table C-IX.1, Appendix C).

Naturally occurring Be-7 due to cosmic ray activity was detected in 39 of 44 samples. Naturally occurring K-40 activity was found in all samples. No other nuclides were detected and all required LLDs were met.

c. Grass Samples were collected from four locations (CL-01, CL-02, CL-08, and CL-1 16) biweekly May through October.' The following analyses were performed:

Gamma Spectrometry Each grass sample was analyzed for concentrations of gamma emitting nuclides (Table C-IX.2, Appendix C).

Naturally occurring Be-7 due to cosmic ray activity was detected in 51 of 52 samples. Naturally occurring K-40 activity was found in 51 of 52 samples. No other nuclides were detected and all required LLDs were met.

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Panasonic 814 (CaSO 4 ) thermoluminescent dosimeters. Fifty-four TLD locations were established around the site. Results of TLD measurements are listed in Tables C-X.1 to C-X.3, Appendix C.

A total of 216 TLD measurements were made in 2008. The average dose from the inner ring was 20.2 mR/quarter. The average dose from the outer ring was 20.3 mR/quarter. The average dose from the special interest group was 20.1 mR/quarter. The average dose from the supplemental group was 19.1 mR/quarter. The quarterly measurements ranged from 15.7 to 25.3 mR/quarter. Some statistical anomalies were noted for two TLD stations. TLD CL-49 for fourth quarter had a slightly higher than average 2 standard deviation of 6.4 mR/quarter. The two TLDs associated with the standard deviation had the following results:

Clinton 2009 Errata Data Section 24 of 60 one had readings of 23.6, 25.6 and 26.8 and the other had readings of 19.6, 19.6 and 20.3, resulting in the higher than average 2 standard deviation. TLD CL-58 for third quarter has a slightly higher than average 2 standard deviation of 4.8 mR/quarter. The two TLDs associated with the standard deviation had the following results: one had readings of 20.1, 25.6 and 26.8 and the other had readings of 18.1, 18.8 and 18.1, resulting in the higher than average 2 standard deviation. The inner ring and outer ring measurements compared well to the Control Station, CL-1 1, which ranged from 17.3 mR/quarter to 21.6 mR/quarter with an average measurement of 19.3 mR/quarter. A comparison of the Inner Ring and Outer Ring data to the Control Location data indicate that the ambient gamma radiation levels from all the locations were comparable. The historical ambient gamma radiation data from the control location were plotted along with similar data from the Inner and Outer Ring Locations (Figure C-2, Appendix C).

At the end of 2008, the data comparison between the original and newly installed TLDs showed comparable results.

D. Land Use Survey A Land Use Survey conducted during the July through October 2008 growing season around the Clinton Power Station (CPS) was performed by Environmental Inc. (Midwest Labs) for Exelon to comply with Clinton's Offsite Dose Calculation Manual, section 5.2. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 538 ft2 in each of the sixteen 22 1/2 degree sectors around the site. The distance and direction of all locations from the CPS Station HVAC vent stack were positioned using Global Positioning System (GPS) technology. There were no changes required to the CPS REMP, as a result of this survey. The results of this survey are summarized below.

Clinton 2009 Errata Data Section 25 of 60 Distance in Miles from the CPS Station HVAC Vent Stack Sector Residence Garden Milk Farm Miles Miles Miles I N 0.9 0.9 0.9 2 NNE 1.0 2.3 3.0 3 NE 1.3 2.1 >5.0 4 ENE 1.8 2.6 >5.0 5 E 1.0 1.0 1.0 6 ESE 3.2 3.3 >5.0 7 SE 2.4 2.4 >5.0 8 SSE 1.7 2.7 >5.0 9 S 3.0 3.0 4.1 10 SSW 2.9 >5.0 3.4 11 SW 0.7 >5.0 3.6 12 WSW 1.6 2.3 3.4 13 W 1.2 2.0 >5.0 14 WNW 1.6 >5.0 >5.0 15 NW 1.6 2.3 >5.0 16 NNW 1.7 1.3 1.3 E. Summary of Results - Inter-Laboratory Comparison Program The primary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices for 19 analytes (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:

Clinton 2009 Errata Data Section 26 of 60 Analytics Evaluation Criteria Analytics' evaluation report provides a ratio of TBE's result 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 samples did not meet the specified acceptance criteria for the following reasons:

1. Teledyne Brown Engineering's Analytics December 2008 Sr-89 in milk result of 18.0 pCi/L was higher than the known value of 12.6 pCi/L, resulting in a found to known ratio of 1.43. NCR 09-02 was initiated to investigate this failure.

2. Teledyne Brown Engineering's Analytics' ERA Quik Response water sample January 2008 Sr-89 result of 37.33 pCi/L exceeded the upper acceptance limit of 25.2 pCi/L. No cause could be found for the failure. Studies bracketing these results, RAD 71 and RAD Clinton 2009 Errata Data Section 27 of 60 72 had acceptable Sr-89 results. NCR 08-03 The Inter-Laboratory Comparison Program provides evidence of the counting systems and methods, and that the laboratories are producing accurate and reliable data.

V. References

1. American National Standards Institute, Inc., "Performance, Testing and Procedural Specifications for Thermoluminescent Dosimetry," ANSI N545-1975.

2. Code of Federal Regulations, Title 10, Part 20 (Nuclear Regulatory Commission).

3. CPS 2007 Annual Radioactive Effluent Release Report.

4. "Environmental Radioactivity," M. Eisenbud, 1987 (E187).

5. "Natural Radon Exposure in the United States," Donald T. Oakley, U.S.

Environmental Protection Agency. ORP/SID 72-1, June 1972.

6. Federal Radiation Council Report No. 1, "Background Material for the Development of Radiation Protection Standards," May 13, 1960.

7. International Commission on Radiation Protection, Publication 2, "Report of Committee II on Permissible Dose for Internal Radiation," (1959) with 1962 Supplement issued in ICRP Publication 6; Publication 9, "Recommendations on Radiation Exposure," (1965); ICRP Publication 7 (1965), amplifying specific recommendations of Publication 26 (1977).

8. International Commission on Radiation Protection, Publication No. 39 (1984), "Principles of Limiting Exposure to the Public to Natural Sources of Radiation".

9. "Radioactivity in the Environment: Sources, Distribution and Surveillance," Ronald L. Kathren, 1984.

10. National Council on Radiation Protection and Measurements, Report No.

22, "Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air and Water for Occupational Exposure," (Published as National Bureau of Standards Handbook 69, issued June 1959, superseding Handbook 52).

11. National Council on Radiation Protection and Measurements, Report No.

39, "Basic Radiation Protection Criteria," January 1971.

12. National Council on Radiation Protection and Measurements, Report No.

44, "Krypton-85 in the Atmosphere - Accumulation, Biological Significance, and Control Technology," July 1975.

Clinton 2009 Errata Data Section 28 of 60

13. National Council on Radiation Protection and Measurements, Report No.

91, "Recommendations on Limits for Exposure to Ionizing Radiation,"

June 1987.

14. National Council on Radiation Protection and Measurements, Report No.

93, "Ionizing Radiation Exposure of the Population of the United States,"

September 1987.

15. National Research Council, 1990, Committee on Biological Effects of Ionizing Radiation (BEIR V), Board on Radiation Effects Research on Life Sciences, "The Effects of Exposure to Low Levels of Ionizing Radiation".

16. United States Nuclear Regulatory Commission, Regulatory Guide 4.1, "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants," Revision 1, April 1975.

17. United States Nuclear Regulatory Commission, Regulatory Guide 4.13, "Performance, Testing and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications, "Revision 1, July 1977.

18. United States Nuclear Regulatory Commission, Regulatory Guide 1.109, "Calculation of Annual Dose to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR Part 50, Appendix I, "Revision 1, October 1977.

19. United States Nuclear Regulatory Commission Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program,"

Revision 1, November 1979.

20. United States Nuclear Regulatory Commission, Regulatory Guide 4.15, "Quality Assurance for Radiological Monitoring Programs (Norm Operations) - Effluent Streams and the Environment," Revision 1, February 1979.

21. Technical Specifications, Clinton Power Station, Unit No. 1, Docket No.

50-461, Office of Nuclear Reactor Regulation, 1986. Facility Operating License Number NPF-62.

22. Clinton Power Station, Updated Safety Analysis Report.

23. Clinton Power Station, Unit 1, Off-Site Dose Calculation Manual.

Clinton 2009 Errata Data Section 29 of 60 APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

Clinton 2009 Errata Data Section 30 of 60 Intentionally left blank

m mm m - pl mln - um -- ml - mn - -n TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 1-131 12 I <LLD NA 0 (PCI/LITER)

H-3 16 2000 <LLD <LLD 0 GAMMA 48 BE-7 NA ND ND 0 ,,)

K-40 NA 49 106 106 CL-99 CONTROL 0 (2/24) (3/24) (3/12) NORTH FORK ACCESS (28/71) (38/194) (38/194) 3.5 MILES NNE OF SITE MN-54 15 <LLD <LLD 0 0~

CO-58 15 <LLD <LLD 0

02 FE-59 30 <LLD <LLD 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

rmMnm- i --- m nm m rMt TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 CO-60 15 <LLD <LLD (PCI/LITER)

ZN-65 30 <LLD <LLD NB-95 15 <LLD <LLD 0 t-I ZR-95 30 <LLD <LLD CS-134 15 <LLD <LLD 0 F")

0 CS-137 18 <LLD <LLD 0

BA-140 60 <LLD <LLD 0 t-)

0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

mm ,m *- m m m m m m m i- m -

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 LA-140 15 <LLD <LLD (PCULITER)

CE-144 NA ND ND DRINKING WATER GR-B 12 4 3 NA 3 CL-14 INDICATOR (PCI/LITER) (2/12) (2/12) STATION PLANT SERVICE BLDG (1.8/4.1) (1.8/4.1) ONSITE H-3 4 2000 <LLD NA 0 t3 GAMMA 12 0 BE-7 NA ND NA 0

K-40 NA 183 NA 183 CL-14 INDICATOR (1/12) (1/12) STATION PLANT SERVICE BLDG n CD ONSITE u,,J 0

MN-54 15 <LLD NA 0 ON ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

S- m n m t m m m m m am w m m TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 DRINKING WATER CO-58 15 <LLD NA 0 (PCI/LITER)

FE-59 30 <LLD NA 0 CO-60 15 <LLD NA 0 ZN-65 30 <LLD NA 0

0 NB-95 15 <LLD NA ZR-95 30 <LLD NA 0

1-131 15 <LLD NA 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING 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 THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 DRINKING WATER CS-134 15 <LLD NA 0 (PCI/LITER)

CS-137 18 <LLD NA BA-140 60 <LLD NA LA-140 15 <LLD NA 0

0 tzý CE- 144 NA ND NA 0

0 WELL WATER H-3 12 200 <LLD NA (PCI/LITER) CI)o 0

0 GAMMA 12 BE-7 NA ND NA 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

on -m m-m OR TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 WELL WATER K-40 NA ND NA 0 (PCI/LITER)

MN-54 15 <LLD NA 0 ON CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0

0 CO-60 15 <LLD NA 0

ZN-65 30 <LLD NA 0

NB-95 15 <LLD NA ON ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 WELL WATER ZR-95 30 <LLD NA 0 (PCI/LITER)

CS-134 15 <LLD NA 0 CS-137 18 <LLD NA 0 BA-140 60 <LLD NA 0 0

LA-140 15 <LLD NA 0

CE-144 NA ND NA 0

FISH GAMMA 16 (PCUKG WET) BE-7 NA ND ND 0 * -.1 0

ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING 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 THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 K-40 NA 3130 3063 3130 CL- 19 INDICATOR 0 (PCI/KG WET) (8/8) (8/8) (8/8) END OF DISCHARGE FLUME (2410/3650) (2260/3380) (2410/3650) 3.4 MILES E OF SITE MN-54 130 <LLD <LLD 0 00 CO-58 130 <LLD <LLD 0 0

FE-59 260 <LLD <LLD 0 CI.,

CO-60 130 <LLD <LLD 0 0o ZN-65 260 <LLD <LLD 0 00 0

NB-95 NA ND ND 00 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING 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 THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 ZR-95 NA ND ND (PCI/KG WET)

CS-134 100 <LLD <LLD 0 CS-137 100 <LLD <LLD 0 BA-140 NA ND ND 0

0 LA-140 NA ND ND 0

CE-144 NA ND ND 0O 0

SEDIMENT GAMMA 2 (PCIUKG DRY) BE-7 NA ND NA 0

ON ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 K-40 NA 8420 NA 8420 CL-07B INDICATOR 0 (PCI/KG DRY) (2/2) (2/2) CLINTON LAKE (6980/9860) (6980/9860) 2.1 MILES SE OF SITE MN-54 NA ND NA 0 CO-58 NA ND NA 0

FE-59 NA ND NA CO-60 NA ND NA 0 ZN-65 NA ND NA 0 0J NB-95 NA ND NA 0

ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 ZR-95 NA ND NA 0 (PCI/KG DRY)

CS-134 150 <LLD NA 0 CS-137 180 <LLD NA 0 0

BA-140 NA ND NA 0

0 LA-140 NA ND NA 0,*

0 0-CE-144 NA ND NA 0

C AIR PARTICULATE GR-B 520 10 19 21 21 CL-I l CONTROL (E-3 PCI/CU.METER) (465/468) (52/52) (52/52) AMERENIP SUBSTATION 0 (6/55) (8/110) (81110) 16 MILES S OF SITE ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 GAMMA 40 (E-3 PCI/CU.METER) BE-7 NA 89 79.8 112.7 CL-08 INDICATOR 0 (31/36) (3/4) (4/4) DEWITT CEMETERY (47.8/186) (62.1/104) (58.9/186) 2.2 MILES E OF SITE K-40 NA ND ND 0 k)

CO-60 NA ND ND 0 0

NB-95 NA ND ND ZR-95 NA ND ND 0 I'Q RU-103 NA ND ND 0 0

RU-106 NA ND ND ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 CE-141 NA ND ND 0 0

CE-144 NA ND ND 0

AIR IODINE GAMMA 520 (E-3 PCI/CU.METER) 1-131 70 <LLD <LLD ON-*

0 CD MILK 1-131 20 I NA <LLD 0 (PCULITER)

GAMMA 20 BE-7 NA NA ND 0 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 K-40 NA NA 1207 1207 CL-1 16 CONTROL (PCI/LITER) (20/20) (20/20) PASTURE IN RURAL KENNEY (965/1380) (965/1380) 14 MILES WSW OF SITE MN-54 NA NA ND 0 CO-58 NA NA ND 0 FE-59 NA NA ND 0

CO-60 NA NA ND CD 0

07 ZN-65 NA NA ND 0 0 NB-95 NA NA ND 0

ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 ZR-95 NA NA ND 0 (PCU/LITER)

CS-134 15 NA <LLD 0 CS-137 is NA <LLD 0 BA-140 60 NA <LLD 0 0

LA-140 15 NA <LLD 0

CE-144 NA NA ND 0

0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

l_ mm - - - -m m m - - m - mu ml TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 GAMMA 44 (PCUKG WET) BE-7 NA 406.4 337.1 581.1 CL-I 15 INDICATOR 0 (30/34) (9/10) (10/10) SITE'S SECONDARY ACCESS ROAD (108/2090) (112/667) (148/2090) 0.7 MILES NE OF SITE K-40 NA 4771.8 5035 5281.7 CL-I 18 INDICATOR 0 (34/34) (10/10) (12/12) SITE'S MAIN ACCESS ROAD (1670/8370) (2570/7820) (2760/8370) 0.7 MILES NNE OF SITE MN-54 NA ND ND 0 0

CO-58 NA ND ND 0 0

FE-59 NA ND ND CO-60 NA ND ND 0 CD 4n 0

ZN-65 NA ND ND ND = NOT DETECTED -

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

- - - m - m m - m - m m* - - - m - -

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 NB-95 NA ND ND 0 (PCI/KG WET)

ZR-95 NA ND ND 1-131 60 <LLD <LLD 0

CS-134 60 <LLD <LLD C:)

0 0

CS-137 80 <LLD <LLD 0

BA-140 NA ND ND 0

LA-140 NA ND ND 0)

ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m m m m - m - m mI - m I m - - - m m TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION 4 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 CE-144 NA ND ND 0 (PCI/KG WET)

GRASS GAMMA 52 (PCI/KG WET) BE-7 NA 2152.9 1823.1 2896.9 CL-02 INDICATOR 0 (38/39) (13/13) (13/13) CLINTON'S MAIN ACCESS ROAD 00 (437/5160) (1160/3080) (1310/5160) 0.7 MILES NNE OF SITE K-40 NA 5039.5 4462.3 5306.9 CL-08 INDICATOR 0 (38/39) (13/13) (13/13) DEWITT CEMETERY (3160/8400) (2430/5590) (3480/8400) 2.2 MILES E OF SITE MN-54 NA ND ND 0 113 0

CO-58 NA ND ND C.

0~

FE-59 NA ND ND 0 CO-60 NA ND ND 0 00 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 GRASS ZN-65 NA ND ND 0 (PCI/KG WET)

NB-95 NA ND ND 0 ZR-95 NA ND ND 0 0

1-131 60 <LLD <LLD 0

CS-134 60 <LLD <LLD 0

CS-137 80 <LLD <LLD 0 0 ,,

0 BA-140 NA ND ND 0

0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING 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 THE CLINTON POWER STATION, 2008 Name of Facility: CLINTON POWER STATION DOCKET NUMBER: 50-461 Location of Facility: DEWITT COUNTY IL REPORTING PERIOD: 2008 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 GRASS LA-140 NA ND ND (PCI/KG WET)

CE-144 NA ND ND 0 0O DIRECT RADIATION TLD-QUARTERLY 216 NA 19.9 19.3 21.6 CL-58 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (212/212) (4/4) (4/4)

(15.7/25.3) (17.3/21.6) (19.2/25.3) 4.3 MILES SSW r'-)

CD ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

Clinton 2009 Errata Data Section 51 of 60 APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS

Clinton 2009 Errata Data Section 52 of 60 TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2008 Location Location Description Distance & Direction From Site A. Surface Water CI-13 Salt Creek Bridge on Rt. 10 (indicator) 3.6 miles SW CL-90 Discharge Flume (indicator) 0.4 miles SE CL-91 Parnell Boat Access (control) 6.1 miles ENE CL-99 North Fork Access (control) 3.5 miles NNE B. Drinking (Potable) Water CL-14 Station Plant Service Bldg (indicator) onsite C. Well Water CL-07D Mascoutin Recreation Area (indicator) 2.3 miles ESE CL-12T DeWitt Pump House (indicator) 1.6 miles E CL-12R DeWitt Pump House (indicator) 1.6 miles E D. Milk - bi-weekly / monthly CL-116 Dement Dairy (control) 14 miles WSW E. Air Particulates / Air Iodine CL-01 Camp Quest 1.8 miles W CL-02 Clinton's Main Access Road 0.7 miles NNE CL-03 Clinton's Secondary Access Road 0.7 miles NE CL-04 Residence Near Recreation Area 0.8 miles SW CL-06 Clinton's Recreation Area 0.7 miles WSW CL-07 Mascoutin Recreation Area 2.3 miles SE CL-08 DeWitt Cemetery 2.2 miles E CL-11 Illinois Power Substation (Control) 16 miles S CL-15 Rt. 900N Residence 0.9 miles N CL-94 Old Clinton Road 0.6 miles E F. Fish CL-19 End of Discharge Flume (indicator) 3.4 miles E CL-105 Lake Shelbyville (control) 50 miles S G. Shoreline Sediment CL-07B Clinton Lake (indicator) 2.1miles SE H. Food Products CL-114 Cisco (Control) 12.5 miles SSE CL-115 Site's Secondary Access Road 0.7 miles NE CL-117 Residence North of Site 0.9 miles N CL-118 Site's Main Access Road 0.7 miles NNE

1. Grass CL-01 Camp Quest 1.8 miles W CL-02 Clinton's Main Access Road 0.7 miles NNE CL-08 DeWitt Cemetery 2.2 miles E CL-116 Pasture in Rural Kenney 14 miles WSW

Clinton 2009 Errata Data Section 53 of 60 TABLE B-i: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2008 Location Location Description Distance & Direction From Site J. Environmental Dosimetry - TLD Inner Rino CL-01 1.8 miles W CL-05 0.7 miles NNE CL-22 0.6 miles NE CL-23 0.5 miles ENE CL-24 0.5 miles E CL-34 0.8 miles WNW CL-35 0.7 miles NW CL-36 0.6 miles N CL-42 2.8 miles ESE CL-43 2.8 miles SE CL-44 2.3 miles SSE CL-45 2.8 miles S CL-46 2.8 miles SSW CL-47 3.3 miles SW CL-48 2.3 miles WSW CL-63 1.3 miles NNW Outer Ring CL-51 4.4 miles NW CL-52 4.3 miles NNW CL-53 4.3 miles E CL-54 4.6 miles ESE CL-55 4.1 miles SE CL-56 4.1 miles SSE CL-57 4.6 miles S CL-58 4.3 miles SSW CL-60 4.5 miles SW CL-61 4.5 miles WSW CL-76 4.6 miles N CL-77 4.5 miles NNE CL-78 4.8 miles NE CL-79 4.5 miles ENE CL-80 4.1 miles W CL-81 4.5 miles WNW

Clinton 2009 Errata Data Section 54 of 60 TABLE B-I: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Clinton Power Station, 2008 Location Location Description Distance & Direction From Site Special Interest CL-37 3.4 miles N CL-41 2.4 miles E CL-49 3.5 miles W CL-64 2.1 miles WNW CL-65 2.6 miles ENE CL-74 1.9 miles W CL-75 0.9 miles N Supplemental CL-02 0.7 miles NNE CL-03 0.7 miles NE CL-04 0.8 miles SW CL-06 0.8 miles WSW CL-07 2.3 miles SE CL-08 2.2 miles E CL-15 0.9 miles N CL-33 11.7 miles SW CL-84 0.6 miles E CL-90 0.4 miles SE CL-91 6.1 miles ENE CL-97 10.3 miles SW CL-99 3.5 miles NNE CL-114 12.5 miles SE Control CL-11 16 miles S

Clinton 2009 Errata Data Section 55 of 60 TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Clinton Power Station, 2008 Sample Analysis Sampling Method Analytical Procedure Number Medium Surface Gamma Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Water Spectroscopy from a continuous water compositor. Env. Inc., SPM-1 Sampling Procedure Manual Surface Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid Water from a continuous scintillation water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Drinking Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in Water from a continuous various matrices water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Drinking Gamma Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Water Spectroscopy from a continuous water compositor. Env. Inc., SPM-1 Sampling Procedure Manual Drinking Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid Water from a continuous scintillation water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Well Water Gamma Quarterly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy from a continuous water compositor. Env. Inc., SPM-1 Sampling Procedure Manual Well Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from a continuous scintillation water compositor.

Env. Inc., SPM-1 Sampling Procedure Manual Fish Gamma Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis Spectroscopy collected via electroshocking or other techniques Env. Inc., SPM-1 Sampling Procedure Manual Air Gross Beta One-week composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in Particulates of continuous air various matrices sampling through glass fiber filter paper Env. Inc., SPM-1 Sampling Procedure Manual Air Gamma Quarterly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis Particulates Spectroscopy each station Env. Inc., SPM-1 Sampling Procedure Manual Air Iodine Gamma One-week composite TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy of continuous air sampling through Env. Inc., SPM-1 Sampling Procedure Manual charcoal filter Milk 1-131 Bi-weekly grab sample TBE, TBE-2012 Radioiodine in various matrices when cows are on pasture. Monthly all other times Env. Inc., SPM-1 Sampling Procedure Manual

Clinton 2009 Errata Data Section 56 of 60 TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Clinton Power Station, 2008 Sample Analysis Sampling Method Analytical Procedure Number Medium Food Gross Beta Monthly grab June TBE, TBE-2008 Gross Alpha and/or gross beta activity in Products through September various matrices Env. Inc., SPM-1 Sampling Procedure Manual Food Gamma Monthly grab June TBE, TBE-2007 Gamma emitting radioisotopes analysis Products Spectroscopy through September Env. Inc., SPM-1 Sampling Procedure Manual Grass Gamma Biweekly May through TBE, TBE-2007 Gamma emitting radioisotopes analysis Spectroscopy October Env. Inc., SPM-1 Sampling Procedure Manual TLD Thermoluminescence Quarterly TLDs Global Dosimetry Quality Assurance Manual Dosimetry comprised of two Global Dosimetry CaF 2 elements.

Clinton 2009 Errata Data Section 57 of 60 Figure B-1 Environmental Sampling Locations Within One Mile of the Clinton Power Station, 2008

Clinton 2009 Errata Data Section 58 of 60 Figure B-2 Environmental Sampling Locations Between One and Two Miles of the Clinton Power Station, 2008

Clinton 2009 Errata Data Section 59 of 60 Figure B-3 Environmental Sampling Locations Between Two and Five Miles of the Clinton Power Station, 2008

Clinton 2009 Errata Data Section 60 of 60 Figure B-4 Environmental Sampling Locations Greater Than Five Miles of the Clinton Power Station,2008

APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

CLINTON POWER STATION Annual Radiological Groundwater Protection Program Report January 1 Through December 31, 2009 Prepared By Teledyne Brown Engineering Environmental Services Exelkn..

Nuclear Clinton Power Station Clinton, IL 61727 Docket No: 50-461 April 2010

Table of Contents - Appendix F Radiological Groundwater Protection Program Report (ARGPPR)

Summary and Conclusions ..................................................... 1 I1. Intro d uctio n .................................................................... .... . 3 A. Objectives of the RGPP ................................................ 3 B. Implementation of the Objectives .................................... 3 C. Program Description ....................................................... 4 D. Characteristics of Tritium (H-3) ...................................... 5 Ill. Program Description ............................................................. 6 A. Sample Analysis ......................................................... 6 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

Appendices Appendix A Location Designation of the Annual Radiological Groundwater Protection Program Report (ARGPPR)

Tables Table A-1: Radiological Groundwater Protection Program - Sampling Locations, Clinton Power Station, 2009 Figures Security-Related Information: Maps of the Clinton Power Station have been withheld from public disclosure under 10CFR2.390 and N.J.S.A.

47:1A-1.1 Appendix B Data Tables of the Annual Radiological Groundwater Protection Program Report (ARGPPR)

Tables Table B-1.1 Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table B-1.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table B-11.1 Concentrations of Tritium and Strontium in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

Table B-11.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.

ii

1. Summary and Conclusions In 2006, Exelon instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of Clinton Power Station. This evaluation involved numerous station personnel and contractor support personnel. This report covers groundwater and surface water samples, collected outside of the Licensee required Off-Site Dose Calculation Manual (ODCM) requirements, both on and off station property in 2009. During that time period, 73 analyses were performed on 40 samples from 23 locations.

The monitoring was conducted in two phases.

In assessing all the data gathered for this report, it was concluded that the operation of Clinton Power Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater or surface water at Clinton Power Station.

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 NUREG-1302 in any of the groundwater or surface water samples. In the case of tritium, Exelon specified that the independent laboratory achieve a lower limit of detection 10 times lower than that required by the United States Environmental Protection Agency (USEPA) regulation.

Strontium-90 was not evaluated in 2009.

Tritium was not detected in any of the groundwater or surface water 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. Background levels of tritium were detected at concentrations greater than the self-imposed LLD of 200 pCi/L in two of 17 groundwater monitoring locations. The tritium concentrations ranged from 217 +

95 pCi/L to 933 +/- 170 pCi/L.

Intentionally left blank II. Introduction The Clinton Power Station (CPS), consisting of one approximately 1140 MW gross electrical power output boiling water reactor is located in Harp Township, DeWitt County, Illinois. CPS is owned and operated by AmerGen Energy Company and became operational in 1987. Unit No. 1 went critical on February 15, 1987. The site encloses approximately 13,730 acres. This includes the 4,895 acre, man-made cooling lake and about 452 acres of property not owned by AmerGen. The plant is situated on approximately 150 acres. The cooling water discharge flume - which discharges to the eastern arm of the lake -

occupies an additional 130 acres. Although the nuclear reactor, supporting equipment and associated electrical generation and distribution equipment lie in Harp Township, portions of the aforementioned 13,730 acre plot reside within Wilson, Rutledge, DeWitt, Creek, Nixon and Santa Anna Townships.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2009.

A. Objectives 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 Clinton Power Station as discussed below:

-3

Exelon and its consultant identified locations as described in the Phase 1 study. Phase 1 studies were conducted by Connestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators as well as the public on an Exelon web site in station specific reports.

http ://www.exeloncorp.com/ourcompanies/powergen/nuclear/Tritiu m.htm

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

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

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

5. Clinton Power 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 and A-2, Appendix A.

Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following regulatory 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, inter-laboratory cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables after initial review by the contractor.

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 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-10 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 beta 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 TBE and EIML to analyze the environmental samples for radioactivity for the Clinton Power Station RGPP in 2009.

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 Clinton Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Clinton Power 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 13 nuclides, Be-7, K-40, 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.

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, milk, and vegetation. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Clinton Power Nuclear Power Station, Illinois Power Company, Annual Report 1987, May 1988.

The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.

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 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to and including 2006. 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.

c. Surface Water Data Tritium concentrations are routinely measured in Clinton Lake.

According to the USEPA, surface water data typically has an uncertainty +/- 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 Baseline samples were collected from on and off-site wells during two (2) Phases at the station. Analytical results and anomalies are discussed below.

Tritium Samples from 17 locations were analyzed for tritium activity (Table B-1.1 Appendix B). Tritium values ranged from below the Exelon imposed LLD of 200 pico-curies per liter to 933 pCi/I.

Strontium Strontium-90 was not evaluated in 2009.

Gamma Emitters Naturally occurring Beryllium-7 was not detected in 2009.

Additionally, naturally occurring Potassium-40 was detected in one of 17 samples. The concentration was 66 pCi/liter. No other gamma emitting nuclides were detected. (Table B-1.2, Appendix B).

B. Surface Water Results Surface Water Baseline samples were collected from on and off-site surface water during two (2) Phases at the station. Analytical results and anomalies are discussed below.

Tritium Samples from six locations were analyzed for tritium activity (Table B-11.1 Appendix B). Tritium was not detected at concentrations greater than the LLD.

Strontium Strontium-90 was not evaluated in 2009.

Gamma Emitters No gamma emitting nuclides were detected. (Table B-11.2, Appendix B).

APPENDIX A LOCATION DESIGNATION OF THE ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Clinton Power Station, 2009 Site Site Type B-3 Monitoring Well MW-CL-1 Monitoring Well MW-CL-2 Monitoring Well MW-CL-121 Monitoring Well MW-CL-131 Monitoring Well MW-CL-13S Monitoring Well MW-CL-1 4S Monitoring Well MW-CL-1 51 Monitoring Well MW-CL-15S Monitoring Well MW-CL-16S Monitoring Well MW-CL-17S Monitoring Well MW-CL-181 Monitoring Well MW-CL-18S Monitoring Well MW-CL-19S Monitoring Well MW-CL-20S Monitoring Well MW-CL-21S Monitoring Well MW-CL-22S Monitoring Well SW-CL-i Surface Water SW-CL-2 Surface Water SW-CL-4 Surface Water SW-CL-5 Surface Water SW-CL-6 Surface Water SW-CL-7 Surface Water A-1

APPENDIX B DATA TABLES OF THE ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 B-3 04/23/09 < 131 B-3 10/21/09 < 165 MW-CL-1 04/23/09 < 131 MW-CL-1 10/21/09 < 167 MW-CL-2 04/22/09 < 132 MW-CL-2 10/21/09 < 168 MW-CL-121 04/23/09 < 131 MW-CL-121 10/22/09 < 172 MW-CL-131 04/29/09 < 160 MW-CL-131 10/22/09 < 172 MW-CL-13S ORIGINAL 04/22/09 230 + 96 MW-CL-13S RERUN 04/22/09 < 157 MW-CL-13S 10/22/09 < 174 MW-CL-14S 04/23/09

131 MW-CL-14S 10/21/09 < 186 MW-CL-151 04/22/09 < 131 MW-CL-151 10/21/09 < 166 MW-CL-15S 04/22/09 < 131 MW-CL-15S 10/21/09 < 175 MW-CL-16S ORIGINAL 04/22/09 217 + 95 MW-CL-16S RECOUNT 04/22/09 380 + 109 MW-CL-1 6S RERUN 04/22/09 309 + 115 MW-CL- 16S 10/21/09 < 186 MW-CL-1 7S 04/22/09 < 131 MW-CL-17S 10/21/09

174 MW-CL-181 04/22/09 < 129 MW-CL-181 10/21/09 < 180 MW-CL-18S 04/22/09 < 126 MW-CL-18S 10/21/09 < 188 MW-CL-19S 04/23/09 < 133 MW-CL-19S 10/22/09

181 MW-CL-20S 04/22/09 < 133 MW-CL-20S 10/22/09 < 186 MW-CL-21 S 01/21/09 933 +/- 170 MW-CL-21S ORIGINAL 04/23/09 592 +/- 112 MW-CL-21 S RERUN 04/23/09 715 +/- 141 MW-CL-21 S 07/22/09 578 +/- 110 MW-CL-21S 10/22/09 670 +/- 145 MW-CL-22S 04/22/09 < 169 MW-CL-22S 10/21/09

181 B-1

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER + SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD B-3 10/21/09 < 37 < 28 <4 <4 <8 < 4 < 6 <4 < 7 < 3 <4 < 25 < 8 MW-CL-1 10/21/09 < 37 < 91 < 5 < 4 < 11 < 5 < 7 <5 < 9 < 4 < 4 < 26 < 10 MW-CL-2 10/21/09 < 33 < 64 < 3 < 3 < 8 < 4 < 6 <3 < 6 < 3 < 3 < 24 < 7 MW-CL-121 10/22/09 < 37 < 85 < 4 < 5 < 9 < 5 < 9 <4 < 7 < 4 <5 < 30 < 9 MW-CL-131 10/22/09 < 32 66 34 < 3 < 3 < 8 < 3 < 7 < 4 < 6 < 3 < 3 < 21 < 7 MW-CL-13S 10/22/09 < 40 < 87 < 5 < 5 < 11 < 4 < 9 < 5 < 9 < 4 < 5 < 32 < 10 MW-CL-14S 10/21/09 < 32 < 32 < 3 < 3 < 6 < 3 < 7 < 3 < 5 < 3 < 3 < 22 < 8 MW-CL-151 10/21/09 < 34 < 31 < 3 < 3 < 7 < 3 < 6 < 4 < 7 < 3 < 3 < 23 < 6 MW-CL-15S 10/21/09 < 37 < 35 < 4 < 4 < 9 < 4 < 8 < 5 < 8 < 4 < 4 < 28 < 8 MW-CL-16S 10/21/09 < 39 < 32 < 4 < 4 < 10 < 4 < 8 < 5 < 8 < 4 < 5 < 29 <8 MW-CL-17S 10/21/09 < 31 < 30 < 3 < 4 < 8 < 4 <7 <4 < 7 < 3 < 3 < 26 <9 MW-CL-181 10/21/09 < 46 < 81 < 4 < 5 < 10 < 4 < 8 < 6 < 9 < 4 < 4 < 32 < 10 MW-CL-18S 10/21/09 < 38 < 39 < 4 < 4 < 8 < 4 < 9 < 5 < 9 < 3 < 4 < 30 < 8 MW-CL-19S 10/22/09 < 35 < 69 < 3 < 4 < 10 < 4 < 8 < 4 < 8 < 4 < 4 < 27 < 7 MW-CL-20S 10/22/09 < 44 < 36 < 5 < 4 < 9 < 4 < 10 < 6 < 9 < 4 < 4 < 34 < 7 MW-CL-21S 10/22/09 < 41 < 51 < 3 < 4 < 10 < 2 < 6 < 4 < 7 < 2 < 3 < 24 < 6 MW-CL-22S 10/21/09 < 42 < 83 < 5 < 5 < 11 < 5 < 10 < 6 < 9 < 4 < 5 < 33 < 11

TABLE B-Il.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 SW-CL-1 04/23/09 < 152 SW-CL-1 10/22/09 < 177 SW-CL-2 04/23/09 < 154 SW-CL-2 10/21/09

179 SW-CL-4 04/23/09 < 154 SW-CL-4 10/21/09

179 SW-CL-5 04/23/09 < 155 SW-CL-5 10/22/09 < 184 SW-CL-6 10/22/09 < 179 SW-CL-7 10/22/09 < 179 B-3

Sm m m mmm= m - m - m -

m m -

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-1 37 Ba-140 La-140 PERIOD SW-CL-1 10122/09 < 37 < 37 <4 <5 <9 <3 <9 <5 <8 <4 <4 < 29 <9 SW-CL-2 10/21/09 < 38 < 28 <4 <4 <9 <4 <7 <5 <7 <4 <4 < 30 <7 SW-CL-4 10/21/09 < 42 < 42 <4 <5 <8 <5 <8 <5 < 10 <4 <4 < 34 < 11 SW-CL-5 10/22/09 < 18 < 18 <2 <2 <4 <2 <4 <2 <4 <2 <2 < 16 <6 SW-CL-6 10/22/09 < 18 < 32 <2 <2 <4 <2 <3 <2 <4 <2 <2 < 17 <5 SW-CL-7 10/22/09 < 19 <15 <2 <2 <4 <2 <4 <2 <4 <2 <2 <16 <5

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U-603952, 2009 Annual Radiological Environmental Operating Report

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