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

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1 I1. In tro d u c tio n ........................................................................................................................

3 A. O bjectives of the REM P ....................................................................................

3 B. Im plem entation of the O bjectives

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3 I1l. Program Description

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4 A. Sam ple Collection

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4 B. Sam ple Analysis ...............................................................................................

6 C. Data Interpretation

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6 D. Program Exceptions

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8 E. Program Changes ...........................................................................................

11 IV. Results and Discussion

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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

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

15 2. Terrestrial

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

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

.16 c. G rass .........................................................................................

16 C. Am bient Gam m a Radiation

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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 Tables Table A-1 Appendix B Tables Table B-1: Table B-2: Figures Figure B-i: Figure B-2: Figure B-3: Figure B-4: Appendix C Tables Table C-1.1 Table C-1.2 Radiological Environmental Monitoring Report Summary Radiological Environmental Monitoring Program Annual Summary for the Clinton Power Station, 2009 Location Designation, Distance & Direction, and Sample Collection

&Analytical Methods Radiological Environmental Monitoring Program -Sampling Locations, Distance and Direction, Clinton Power Station, 2009 Radiological Environmental Monitoring Program -Summary of Sample Collection, Clinton Power Station, 2009 Environmental Sampling Locations Within One Mile of the Clinton Power Station, 2009 Environmental Sampling Locations Between One and Two Miles from the Clinton Power Station, 2009 Environmental Sampling Locations Between Two and Five Miles from the Clinton Power Station, 2009 Environmental Sampling Locations Greater Than Five Miles from the Clinton Power Station, 2009 Data Tables and Figures -Primary Laboratory Concentrations of 1-131 in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.ii Table C-I.3 Table C-11.1 Table C-II.2 Table C-11.3 Table C-111.1 Table C-111.2 Table C-IV.1 Table C-V.1 Table C-VI.1 Table C-VI.2 Table C-VI.3 Table C-VII.1 Table C-VIII.1 Table C-VIII.2 Table C-IX.1 Table C-IX.2 Table C-X.1 Table C-X.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2009.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.Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Grass Samples Collected in the Vicinity of Clinton Power Station, 2009.Quarterly TLD Results for Clinton Power Station, 2009.Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Special Interest and Control Locations for Clinton Power Station, 2009.iii Table C-X.3 Summary of the Ambient Dosimetry Program for Clinton Power Station, 2009.Figures Figure C-1 Figure C-2 Appendix D Tables Table D-1 Table D-2 Table D-3 Appendix E Appendix F Mean Monthly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of CPS, 2009.Mean Quarterly Ambient Gamma Radiation Levels (TLD) in the Vicinity of CPS, 2009.Inter-Laboratory Comparison Program Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)Teledyne Brown Engineering, 2009 Errata Data 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.

-3 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 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 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.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 Sector Residence Garden Miles Miles 1 N 0.9 0.9 2 NNE 3 NE 4 ENE 5E 6 ESE 7 SE 8 SSE 9S 10SSW 11 SW 12 WSW 13W 14 WNW 15 NW 16 NNW 1.0 1.3 1.7 1.0 3.2 2.4 1.7 3.0 2.9 0.7 1.6 1.2 1.6 1.6 1.2 3.0 4.2 2.6 1.0 3.2 2.4 2.7 4.0>5.0>5.0 2.3 2.0>5.0 2.4 1.2 HVAC Vent Stack Milk Farm Miles 0.9 2.9>5.0>5.0 1.0>5.0>5.0>5.0 4.1>5.0>5.0 3.3>5.0>5.0>5.0 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 (PCI/LITER) 1-131 H-3 10 16 48<LLD<LLD<LLD 2000 <LLD 0 GAMMA BE-7 K-40 MN-54 CO-58 FE-59 CO-60 NA <LLD NA 40 (5/24)(23/69)15 <LLD 15 <LLD 30 <LLD 15 <LLD<LLD 45 (4/24)(32/78)<LLD<LLD<LLD 57 (2/12)(37/78)CL-99 CONTROL NORTH FORK ACCESS 3.5 MILES NNE OF SITE 0 0 0 0<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 (PCI/LITER)

ZN-65 NB-95 ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD NA <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 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 (PCI/LITER)

GR-B 12 H-3 4 GAMMA BE-7 12 K-40 4 5.0 (2/12)(2.4/7.7)2000 <LLD NA <LLD NA 63 (3/12)(48/86)15 <LLD 15 <LLD 30 <LLD 15 <LLD NA NA 5.0 (2/12)(2.4/7.7)CL-14 INDICATOR STATION PLANT SERVICE BLDG ONSITE MN-54 CO-58 FE-59 CO-60 NA NA NA NA NA NA 0 0 63 (3/12)(48/86)CL-14 INDICATOR STATION PLANT SERVICE BLDG ONSITE 0 0 0 0 0 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 (PCI/LITER)

ZN-65 NB-95 ZR-95 1-131 30 <LLD 15 <LLD 30 <LLD 15 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD NA NA NA NA NA NA NA NA 0 0 0 0 CS-134 CS-137 BA-140 LA-140 0 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 (PCI/LITER)

WELL WATER (PCI/LITER)

CE-144 NA <LLD 2000 <LLD NA NA 0 0 H-3 12 12 GAMMA BE-7 K-40 MN-54 CO-58 FE-59 CO-60 NA <LLD NA 54 (3/12)(34/91)15 <LLD 15 <LLD 30 <LLD 15 <LLD NA NA NA NA NA NA 91 (1/4)CL- 12R INDICATOR DEWITT PUMP HOUSE 1.6 MILES E OF SITE 0 0 0 0 0 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 -1 m Va --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 (PCI/LITER)

ZN-65 NB-95 ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD NA <LLD NA NA NA NA NA NA NA NA 0 0 0 0 0 0 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 (PCI/KG WET)GAMMA BE-7 16 NA <LLD<LLD 0 K-40 MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 NA 3240 (8/8)(2400/3850) 130 <LLD 130 <LLD 260 <LLD 130 <LLD 260 <LLD NA <LLD 3125 (8/8)(2200/3930) 3240 CL-19 INDICATOR (8/8) END OF DISCHARGE FLUME (2400/3850) 3.4 MILES E OF SITE<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 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 do mM 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 00 FISH (PCI/KG WET)SEDIMENT (PCI/KG DRY)ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 GAMMA BE-7 NA <LLD 130 <LLD 150 <LLD NA <LLD NA <LLD NA <LLD NA <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 NA NA 0 0 K-40 NA 7230 (2/2)(6980/7480) 7230 (2/2)(6980/7480)

CL-07B INDICATOR CLINTON LAKE 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 -- -f o' 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 (PCI/KG DRY)MN-54 CO-58 FE-59 CO-60 ZN-65 NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD 150 <LLD NA NA NA NA NA 0 0 0 0 0 NB-95 ZR-95 CS-134 NA NA NA 0 0 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 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 (PCI/KG DRY)CS-137 BA-140 LA-140 CE-144 180 <LLD NA <LLD NA <LLD NA <LLD 10 20 (468/468)(5/41)NA 107 (35/36)(35/886)NA NA NA NA 0 0 0 0 0 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 520 19 (52/52)(7/41)93 (4/4)(67/141)21 (52/52)(9/38)278 (4/4)(68/886)GAMMA BE-7 40 CL-06 INDICATOR CLINTON'S RECREATION AREA 0.7 MILES WSW OF SITE CL-06 INDICATOR CLINTON'S RECREATION AREA 0.7 MILES WSW OF SITE CL-07 INDICATOR MASCOUTIN RECREATON AREA 2.3 MILES SE OF SITE K-40 NA 36 (4/36)(25/53)<LLD<LLD 53 (1/4)0 0 0 CO-60 NA <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)

-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 (E-3 PCI/CU.METER)

NB-95 ZR-95 RU- 103 RU-106 CS-134 CS-137 CE-141 CE-144 NA <LLD NA <LLD NA <LLD NA <LLD 50 <LLD 60 <LLD NA <LLD NA <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 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 -nmann ulin m mann m -n 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 (E-3 PCI/CU.METER) 1-131 520 70 <LLD<LLD<LLD 0 0 MILK (PCI/LITER) 1-131 19 19 NA GAMMA BE-7 K-40 MN-54 CO-58 FE-59 CO-60 NA NA NA NA NA NA NA NA NA NA 1243 (19/19)(1080/1450) 1243 (19/19)(1080/1450)

CL-116 CONTROL PASTURE IN RURAL KENNEY 14 MILES WSW OF SITE<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 NA NA 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 -so M a" M w l -m = 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 (PCI/LITER)

ZN-65 NB-95 ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 NA NA NA NA NA NA 15 NA 18 NA 60 NA 15 NA NA NA<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 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 (PCI/KG WET)GAMMA BE-7 48 NA 832 (35/36)(156/3430)

NA 5417 (36/36)(2210/10400) 440 (11/12)(123/1160) 6203 (12/12)(2760/10300) 924 (11/12)(156/3430) 6203 (12/12)(2760/10300)

CL-115 INDICATOR SITE'S SECONDARY ACCESS ROAD 0.7 MILES NE OF SITE CL- 114 CONTROL CISCO 12.5 MILES SSEOF SITE 0 0 K-40 MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD<LLD<LLD<LLD<LLD 0 0 0<LLD<LLD 0 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 (PCI/KG WET)ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 CE-144 GAMMA BE-7 NA <LLD 60 <LLD 60 <LLD 80 <LLD NA <LLD NA <LLD NA <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 GRASS (PCI/KG WET)52 NA 2684 (39/39)(813/8300) 2179 (13/13)(1430/4590) 3126 (13/13)(1800/5440)

CL-02 INDICATOR CLINTON'S MAIN ACCESS ROAD 0.7 MILES NNE OF SITE 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 -_ 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 (PCI/KG WET)K-40 NA 6057 (39/39)(3110/8670) 6665 (13/13)(3500/8360) 6665 (13/13)(3500/8360)

CL-I 16 CONTROL PASTURE IN RURAL KENNEY 14 MILES WSW OF SITE 0 0 MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD NA <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 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 (PCI/KG WET)1-131 CS-134 CS-137 BA-140 LA-140 CE-144 60 <LLD 60 <LLD 80 <LLD NA <LLD NA <LLD NA <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 DIRECT RADIATION TLD-QUARTERLY (MILLI-ROENTGEN/QTR.)

215 NA 18.6 17.9 20.5 (212/212)

(4/4) (4/4)(13.8/24.5)

(16.2/19.1)

(18.0/24.5)

CL-43 INDICATOR 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 CL-90 CL-91 CL-99 Salt Creek Bridge on Rt. 10 (indicator)

Discharge Flume (indicator)

Parnell Boat Access (control)North Fork Access (control)3.6 miles SW 0.4 miles SE 6.1 miles ENE 3.5 miles NNE B. Drinking (Potable)

Water CL-14 C. Well Water Station Plant Service Bldg (indicator)

Mascoutin Recreation Area (indicator)

DeWitt Pump House (indicator)

DeWitt Pump House (indicator) onsite CL-07D CL-12T CL-12R D. Milk -bi-weekly

/ monthly CL-116 Dement Dairy (control)E. Air Particulates

/ Air Iodine CL-01 CL-02 CL-03 CL-04 CL-06 CL-07 CL-08 CL-11 CL-15 CL-94 Camp Quest Clinton's Main Access Road Clinton's Secondary Access Road Residence Near Recreation Area Clinton's Recreation Area Mascoutin Recreation Area DeWitt Cemetery Illinois Power Substation (Control)Rt. 900N Residence Old Clinton Road End of Discharge Flume (indicator)

Lake Shelbyville (control)2.3 miles ESE 1.6 miles E 1.6 miles E 14 miles WSW 1.8 miles W 0.7 miles NNE 0.7 miles NE 0.8 miles SW 0.7 miles WSW 2.3 miles SE 2.2 miles E 16 miles S 0.9 miles N 0.6 miles E 3.4 miles E 50 miles S F. Fish CL-19 CL-105 G. Shoreline Sediment CL-07B Clinton Lake (indicator) 2.1miles SE H. Food Products CL-114 CL-115 CL-117 CL-1 18 I .Grass Cisco (Control)Site's Secondary Access Road Residence North of Site Site's Main Access Road Camp Quest Clinton's Main Access Road DeWitt Cemetery Pasture in Rural Kenney 12.5 miles SSE 0.7 miles NE 0.9 miles N 0.7 miles NNE 1.8 miles W 0.7 miles NNE 2.2 miles E 14 miles WSW CL-01 CL-02 CL-08 CL-116 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 1 i17 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* .... CLINTON 7.~LAKE .I IFigure B-2 Environmental Sampling Locations between One and Two Miles of the Clinton Power Station,.

2009 I 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 PERIOD CL-90 12/31/08 -01/28/09 01/28/09 -02/25/09 02/25/09 -03/25/09 03/25/09 -04/29/09 04/29/09 -05/27/09 05/27/09 -06/24/09 06/24/09 -07/29/09 07/29/09 -08/26/09 08/26/09 -09/30/09 09/30/09 -10/28/09 10/28/09 -11/25/09 11/25/09 -12/30/09< 0.9< 0.5< 0.4< 0.4< 0.8< 0.8< 0.4< 0.3< 0.5< 0.8 0.9 +/- 0.2 (1)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 PERIOD CL-90 CL-13 CL-91 CL-99 01/28/09 04/29/09 07/29/09 10/28/09 03/25/09 06/24/09 09/30/09 12/30/09 174 121 125 150 170 120 120 148< 164< 120< 173< 159 166 122 126 161 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 01/28/09 -02/25/09 < 34 02/25/09 -03/25/09 < 23 03/25/09 -04/29/09 < 9 04/29/09 -05/27/09 < 35 05/27/09 -06/24/09 < 19 06/24/09 -07/29/09 < 22 07/29/09 -08/26/09 < 51 08/26/09 -09/30/09 < 35 09/30/09 -10/28/09 < 48 10/28/09 -11/25/09 < 28 11/25/09 -12/30/09 < 22 MEAN CL-99 ** 12/31/08 -01/28/09 < 29 01/28/09 -02/25/09 < 40 02/25/09 -03/25/09 < 38 03/25/09 -04/29/09 < 9 04/29/09 -05/27/09 < 37 05/27/09 -06/24/09 < 16 06/24/09 -07/29/09 < 23 07/29/09 -08/26/09 < 43 08/26/09 -09/30/09 < 41 09/30/09 -10/28/09 < 32 10/28/09 -11/25/09 < 20 11/25/09 -12/30/09 < 22 MEAN 32 +/- 23 < 1<62 <4<24 <2 35 +/- 29 < 1< 68 <4<18 <2<49 <2< 113 < 5<69 < 3<90 < 5<68 <2<19 <2 34+/-5 -<27 <3<97 <5<70 <4<18 <1< 36 <4<29 < 1<22 <2 78 62 < 4<47 <4<57 <3 37 26 < 2<23 <2<1<3<3.< 1<4<2<2<6<4<5<3<2<3<5<4<1<3<2<3<4<5<3<2<3<3<8<6<2<8<5<5< 12<9<9<6<5<7<10< 10<2< 11<4<6< 12<8<8<4<6<1<3<3<1<4<2<2<7<4<4<3<2<3<6<4<1<4<2<2<4<4<3<2<3<2<7<5<2<7<4<4< 12<8<9<6<5<7< 11< 10<1<9<3<5< 10<9<7<4<5<1<4<3<1<4<2<3<6<5<6<3<3<3<5<5<1<4<2<3<5<5<4<2<3<3<7<5<2<7<4<5<9<7< 10<6<4<6<9<8<2<7<3<4<9<8<6<4<5<1<4<2<1<3<2<2<5<4<5<2<2<3<4<4<1<4<1<2<5<4<3<2<2<1<4<3<1<3<2<2-<6<4<5<3<2<3<5<4<1<4<2<2<5<5<3<2<2< 10< 24<17< 18< 29< 19* 24*21< 27< 32< 25* 25* 22< 27< 29< 15* 32< 16* 23< 24< 33< 21< 21< 25<3<7 , ,7<6< 12<7<7<9< 10< 12<8<8<6< 10< 10<5< 12<6<8<6< 10<7<6<9< 11< 29<15<6< 29< 14< 17< 38* 27< 40< 21< 15< 24< 35< 30<5< 31<11< 18< 38< 33< 25< 16< 18 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 PERIOD CL-14 12/31/08 01/28/09 02/25/09 03/25/09 04/29/09 01/28/09 02/25/09 03/25/09 04/29/09 05/27/09 05/27/09 -06/24/09 06/24/09 07/29/09 08/26/09 09/30/09 07/29/09 08/26/09 09/30/09 10/28/09* 2.4 2.4 +/- 1.4< 2.3< 2.1* 3.3 7.7 +/- 2.2< 2.5< 2.6< 2.3< 2.1< 2.1* 2.3 5.0 +/- 7.5 10/28/09 -11/25/09 11/25/09 -12/30/09 MEAN 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 06/24/09 09/30/09 03/25/09 06/24/09 09/30/09 12/30/09< 168* 122< 178* 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 PERIOD 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 CL-14 12/31/08 01/28/09 02/25/09 03/25/09 04/29/09 05/27/09 06/24/09 07/29/09 08/26/09 09/30/09 10/28/09 11/25/09 MEAN-01/28/09-02/25/09-03/25/09-04/29/09-05/27/09-06/24/09-07/29/09-08/26/09-09/30/09-10/28/09-11/25/09-12/30/09< 20< 24< 26<11< 28< 17< 29<41* 36< 44* 28* 23* 40< 39< 57<7< 32< 34 48 86* 42< 38< 46 54<2<3<3<1<2<2+42 <2+62 <5<4<4<3+40 <2<2<2<3<1<4<2<3<6<5<5<3<2<5<5<7<3<4<5<5< 13<9<8<7<5<2<3<3<1<3<2<3<5<5<4<3<2<4<5<5<2<7<3<7< 11<9<7<5<4<2<3<4<1<3<2<3<6<4<5<3<3<4<5<5<2<5<4<5< 10<8<9<5<4<6<6<9< 15< 11<11<13<9< 11* 15< 15< 14<2<2<3<1<3<2<2<5<4<4<2<2<2<3<3<1<3<2<3<6<4<4<3<2<14< 14< 19< 19< 23<19* 28< 27< 26* 31< 25* 23<5<5<6<6<5<6<9<8< 10<7<9<9< 17< 20* 21<6* 17< 14< 20< 44< 27< 35< 18< 16 63 +/- 40* THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES TABLE C-II1.1 CONCENTRATIONS OF TRITIUM IN WELL WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA COLLECTION PERIOD CL-07D CL-12R CL-12T 03/25/09 -03/25/09 06/24/09 -06/24/09 09/30/09 -09/30/09 12/30/09 -12/30/09< 193* 181< 175< 166< 191< 185< 163< 169< 199< 183< 161< 154 MEAN C-6 m m " m = = m m m m m 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 PERIOD 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 CL-07D 03/25/09 06/24/09 09/30/09 12/30/09 MEAN CL-12R 03/25/09 06/24/09 09/30/09 12/30/09 MEAN CL-12T 03/25/09 06/24/09 09/30/09 12/30/09 MEAN< 37< 31< 17< 12< 44< 37< 17<9< 29< 37< 23< 14 34 +/- 0< 38< 74< 14 34 +/- 31< 92 91 +/- 55< 17< 32<4<3<2<1<4<4<2<1<3<4<2<1<4<3<2<1<4<5<2<1<3<4<2<1<9<5<4<3<8< 10<4<2<7<9<5<4<4<3<2<1<4<4<2<1<3<4<2<2<7<7<3<2< 10<9<3<2<4<4<2<1 91 +/- 0<5<5<2<1<3<5<2<2<8<6<3<2<8<8<3<2<5<7<4<3<4<3<1<1<4<4<1<1<3<4<2<1<4<4<2<1<4<4<2<1<3<4<2<1< 23< 24< 19< 17< 29< 33< 17< 12< 7<6<5<5< 11<9<6<4<6< 10<7<5<*< 25< 14<9< 34< 32< 12<6< 27< 28< 18<9 37 +/- 30<37< 20< 11<6<9<4<2< 22< 30< 23< 17 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 PERIOD 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 CL-105 Crappie 04/23/09 < 366 3060 +/- 452 < 29 Carp 04/23/09 < 314 3390 +/- 453 < 24 Largemouth bass 04/23/09 < 472 3140 +/- 554 < 40 Bluegill 04/23/09 < 396 3150 +/- 507 < 31 Bluegill 10/19/09 < 954 3720 t 1340 < 74 Carp 10/19/09 < 559 2200 +/- 846 < 45 Crappie 10/19/09 < 628 2410 +/- 889 < 67 Largemouth bass 10/19/09 < 932 3930 +/- 1190 < 74< 36< 32< 50< 43< 87< 62< 66< 91< 90 < 23< 72 < 26< 117 < 31< 100 < 32< 214 < 94< 115 < 47< 151 < 57< 231 < 70< 58 < 38 < 67 < 25< 49 < 32 < 58 < 24< 86 < 53 < 93 < 36< 82 < 47 < 71 < 31< 141 < 101 < 195 < 71< 108 < 59 < 100 < 47< 122 < 74 < 129 < 65< 158 < 105 < 151 < 76< 29< 23< 40< 29< 70< 57< 59< 81< 752* 648* 1030* 850* 1010* 866* 795* 1040< 222 < 164< 183 < 157< 290 < 214< 254 < 173< 503 < 423< 263 < 325< 227 < 326< 323 < 419 00 MEAN 3125 +/- 1182 CL-19 Carp 04/23/09 < 464 3660 +/- 536 < 35 Bluegill 04/23/09 < 352 2890 +/- 456 < 29 Channel catfish 04/23/09 < 420 3850 +/- 560 < 37 Largemouth bass 04/23/09 < 418 3770 +/- 485 < 34 Bluegill 10/19/09 < 675 3700 +/- 1160 < 59 Carp 10/19109 < 530 2690 +/- 775 < 61 Channel catfish 10/19/09 < 409 2400 +/- 657 < 39 Largemouth bass 10/19/09 < 528 2960 +/- 823 < 57< 49< 35< 41< 48< 70< 62< 46< 63< 114 < 33< 97 < 32< 112 < 32< 100 < 29< 225 < 73< 120 < 38< 110 < 49< 142 < 57< 71 < 52 < 81 < 32 < 34 < 959< 68 < 42 < 71 < 28 < 29 < 793< 77 < 50 < 89 < 34 < 36 < 928< 70 < 51 < 81 < 34 < 33 < 876< 132 < 75 < 148 < 52 < 60 < 703< 100 < 62 < 84 < 47 < 55 < 651< 82 < 47 < 75 < 40 < 47 < 634< 109 < 80 < 97 < 54 < 58 < 864< 286 < 215< 256 < 143< 279 < 163< 248 < 183< 332 < 370< 202 < 248< 181 < 200< 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 Ni PERIOD CL-07B 04123/09 < 478 7480 +/- 776 < 44 < 55 < 130 < 44 < 99 <10/19/09 < 337 6980 +/- 662 < 30 < 30 < 77 < 26 < 53 <MEAN -7230 +/- 707 -----b-95 58 35 Zr-95< 107< 58 Cs-134 Cs-137 Ba-140< 39 < 36 < 926< 24 < 30 < 392 La-140< 247< 124 Ce-144< 243< 153 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 m m -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 PERIOD MIN MAX MEAN+2SD COLLECTION PERIOD MIN MAX MEAN+2SD COLLECTION PERIOD MIN MAX MEAN +2SD U IlL0lU~ LU 00 I ILl,) IIUO 1 /I0 I/UO 01/28/09 02/25/09 04/01/09 04/29/09 06/03/09 07/01/09 07/29/09 09/02/09 09/30/09 10/28/09 12/02/09 U IIlzoUz 02/25/09 04/01/09 04/29/09 06/03/09 07/01/09 07/29/09 09/02/09 09/30/09 10/28/09 12/02/09 12/30/09 ZL 17 11 10 5 9 7 11 14 8 14 17 o0 33 27 19 21 19 22 25 37 17 28 41 OU " o 24 + 10 19 9 14 6 13 7 15 +/- 5 16 +/- 7 18 +/- 8 26 +/- 14 14 4 21 +8 29 +15 I1"ila l/UO 01/28/09 02/25/09 04/01/09 04/29/09 06/03/09 07/01/09 07/29/09 09/02/09 09/30/09 10/28/09 12/02/09 u I/zlIut, 02/25/09 04/01/09 04/29/09 06/03/09 07/01/09 07/29/09 09/02/09 09/30/09 10/28/09 12/02/09 12/30/09 17 12 10 6 11 10 10 17 8 14 18 ao 33 27 20 19 18 26 24 34 19 29 40 24 +/- 9 18 +/- 8 15 +/- 6 12 +/- 7 15 +/- 5 17 +/- 8 16 +/- 7 26 +/- 15 13 +/- 7 21 +/- 8 29 +/- 15 01/28/09 02/25/09 04/01/09 04/29/09 06/03/09 07/01/09 07/29/09 09/02/09 09/30/09 10/28/09 12/02/09-U II--OUu-02/25/09-04/01/09-04/29/09-06/03/09-07/01/09-07/29/09-09/02/09-09/30/09-10/28/09-12/02/09-12/30/09 27 39 31 +/- 1U 19 31 26 +/- 10 9 25 19 +/- 14 12 17 15 +/- 5 7 16 12 +/- 7 15 17 15 +/- 3 14 21 17 +/- 6 15 22 18 +/- 6 7 33 18 +/- 22 10 17 14 +/- 6 14 25 20 +/- 10 22 41 30 +/- 16 7 41 19 +/- 15 NJ 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* GROUP I LOCATIONS WITHIN 1 MILES OF CPS** GROUP II LOCATIONS WITHIN 1-5 MILES OF CPS GROUP III LOCATIONS 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 PERIOD CL-01 12/31/08 -04/01/04/01/09 -07/01/07/01/09 -09/30/09/30/09 -12/30/Be-7 K-40 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144'09'09'09'09 78 90 168 35+/- 31+/- 53+/- 53+/- 31 MEAN 93 +/- 111 CL-02 12/31108 04/01/09 07/01/09 09/30/09 MEAN CL-03 12/31/08 04/01/09 07/01/09 09/30/09 MEAN CL-04 12/31/08 04/01/09 07/01/09 09/30/09 MEAN CL-06 12/31/08 04/01/09 07/01/09 09/30/09 MEAN 04/01/09 07/01/09 09/30/09 12/30/09 04/01/09 07/01/09 09/30/09 12/30/09 04/01/09 07/01/09 09/30/09 12/30/09 04/01/09 07/01/09 09/30/09 12/30/09 61 89 133 70+/- 20+/- 44+/- 40+/- 37< 24< 49< 37< 74< 37< 47< 50< 80< 66< 46< 50< 68<4<2<2<3<2<3<3<4<4<3<2<4 88 +/- 64 80 103 64 57+/- 31+/- 46+/- 34+/- 23<4< 10< 10<4<3<7<8<6<5<6<7<5<5<6<7<6<4<5< 68<6<7< 14< 11<9<5< 12< 14<7<7<8< 10<9<6< 11< 13<5<4<9< 10<5<5< 10<8<4<5< 12< 12<6<5<8< 63<5< 29< 31< 33< 38< 19< 24< 33< 23< 28< 27< 26< 37< 22< 29< 38< 41< 20< 19< 227< 29<3<3<4<4<2<3<4<4<3<3<3<5<3<3<4<5<3<3< 35<4<3<3<4<3<2<3<3<3<3<3<2<3<3<3<3<4<2<2< 28<4< 10< 17< 24<7<5< 14< 16<7<8< 14< 17<6<6< 18< 20<6<6< 14< 90<6< 18< 14< 24< 18< 11< 13< 14< 17< 17< 12< 14< 15< 11< 16< 16< 19< 11< 12< 128< 15 76 +/- 41 86 +/- 25 98 +/- 43 89 +/- 44< 44 26 38< 37< 76+/- 20 < 3+/- 28 < 3<4<6 8 13 14 8 91 +/- 12 32 +/- 17 82 77 886 68+/- 27+/- 47+/- 381+/- 28< 44 25< 668< 83<3+/-21 <3< 41<3 5 9 100 8 278 +/- 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 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 PERIOD CL-07 12/31/08 -04/01/09 04/01/09 -07/01/09 07/01/09 -09/30/09 09/30/09 -12/30/09 MEAN Be-7 K-40 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 CL-08 12/31/08 04/01/09 07/01/09 09/30/09 MEAN CL-1I ** 12/31/08 04/01/09 07/01/09 09/30/09 MEAN CL-15 12/31/08 04/01/09 07/01/09 09/30/09 MEAN CL-94 12/31/08 04/01/09 07/01/09 09/30/09 MEAN-04/01/09-07/01/09-09/30/09-12/30/09-04/01/09-07/01/09-09/30/09-12/30/09-04/01/09-07/01/09-09/30/09-12/30/09-04/01/09-07/01/09-09/30/09-12/30/09 61 +/- 25 91 +/- 57 77 +/- 53 60 +/- 30 72 +/- 29 111 +/- 29 83 +/- 32 84 +/- 32 78 +/- 37 89 +/- 30 73 +/- 23 141 +/- 50 91 +/- 46 67 +/- 28 93 +/- 67 90 +/- 36 72 +/- 47 110 +/- 41 84 +/- 31 89 +/- 32 91 +/- 22 92 +/- 47 77 +/- 37 78 +/- 26 85 +/- 16 53 +/- 0 53 +< 56< 27< 82 23 < 3<4<2<5< 59< 39< 29<61< 32< 43< 73< 95< 30< 31< 40* 69< 40< 44< 46< 82<3<3<3<4<3<4<5<4<3<3<4<4<3<2<3<5<5<8<5<5<4<4<5<4<3<7< 10<5<3<6<7<4<4<7<6<5<7< 10< 12< 10<8<8<7<8<7< 11< 13<9<6< 11< 12<8<9< 10< 11<9<5< 10< 11<6<6<8<9<6<4< 10< 12<6<5<8<9<4<5< 10< 10<6< 26< 32< 29< 40< 29< 23< 23< 41< 24< 31< 37< 43< 29< 28< 34< 32< 24< 25< 23< 33<3<4<4<5<3<3<3<5<2<4<4<4<4<3<3<4<3<2<2<4<2<3<5<4<4<2<3<3<3<2<2<3<7< 20< 20<8<9< 13< 12<7<5< 18< 26<7 16 17 17 18 19 11 11 17 10 16 23 17<3<4<4<4<3<3<3<4<7< 13< 16<6<6< 14< 17<7< 15< 11< 14< 18< 11< 13< 15< 15* 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 PERIOD GROUP I CL-02 CL-03 CL-04 CL-06 CL-15 CL-94 I 12/31/08 01/07/09 01/14/09 01/21/09 01/28/09 02/04/09 02/11/09 02/18/09 02/25/09 03/04/09 03/11/09 03/18/09 03/25/09 04/01/09 04/08/09 04/15/09 04/22/09 04/29/09 05/06/09 05/13/09 05/20/09 05/27/09 06/03/09 06/10/09 06/17/09 06/24/09 07/01/09 07/08/09 07/15/09 07/22/09 07/29/09 08/05/09 08/12/09 08/19/09 08/26/09 09/02/09 09/09/09 09/16/09 09/23/09 09/30/09 10/07/09 10/14/09 10/21/09 10/28/09 11/04/09 11/11/09 11/18/09 11/25/09 12/02/09 12/09/09 12/16/09 12/23/09-01/07/09-01/14/09-01/21/09-01/28/09-02/04/09-02/11/09-02/18/09-02/25/09-03/04/09-03/11/09-03/18/09-03/25/09-04/01/09-04/08/09-04/15/09-04/22/09-04/29/09-05/06/09-05/13/09-05/20/09-05/27/09-06/03/09-06/10/09-06/17/09-06/24/09-07/01/09-07/08/09-07/15/09-07/22/09-07/29/09-08/05/09-08/12/09-08/19/09-08/26/09-09/02/09-09/09/09-09/16/09-09/23/09-09/30/09-10/07/09-10/14/09-10/21/09-10/28/09-11/04/09-11/11/09-11/18/09-11/25/09-12/02/09-12/09/09-12/16/09-12/23/09-12/30/09* 35* 25* 47* 25* 57< 40* 56* 26* 59* 50* 45* 32* 54* 67* 35* 65* 52* 70* 60* 59*<41*<54* 51* 22* 67* 59< 40* 53* 26* 12* 19* 20* 31* 33* 40* 43* 33* 36* 20* 42* 21* 29* 27* 32* 56* 59* 66* 46< 43* 57* 62* 46* 35* 25*<46* 41* 56* 29* 55* 24* 60* 49* 42* 33* 54* 64* 34* 61* 50* 68* 59* 60* 42* 52* 51* 52* 14* 25* 40* 54*<47* 22* 20< 11* 31* 35*<41* 25* 61* 21< 11* 44* 12* 31* 27* 55* 57* 30* 64* 47* 42* 59* 62* 45* 35* 26* 47* 41* 56* 38* 58* 19* 59* 50*<42* 32< 54* 65< 34* 63* 47* 66* 58* 59* 39* 54* 50* 30* 65* 59* 40* 32* 46* 22* 19* 19* 31* 33* 23< 43* 58* 35* 20* 43* 21* 32* 16* 55* 32* 63* 37* 26* 43* 57* 35* 46* 35* 25* 45* 40* 55* 37< 54* 40* 62* 30* 42* 31* 53*<64* 33* 64* 46* 66* 59* 59* 39 (1)* 53* 49* 29* 65* 58* 22* 56* 45* 22* 19* 19* 13* 33* 40* 42* 59* 36* 20*<42* 21* 31* 27< 51* 57* 59* 64* 47< 43* 32* 62* 45* 57* 45*<40* 36* 41*<64* 59* 22< 45* 35* 39* 38* 18* 55* 33* 66* 38* 28*<41* 50* 53* 66* 61* 61* 38* 66* 35* 27* 46* 13* 10* 32* 25* 32* 40* 50* 50* 18* 26* 62* 14* 20* 32* 54* 67* 32* 28* 60* 32* 67* 23* 50 1< 58* 46* 41* 37* 43* 66* 62* 22* 46* 36* 38* 38* 17* 56* 33* 66* 40* 52* 41* 41* 53* 68* 62* 62* 14* 65* 15*<64* 46* 29* 14* 31< 11* 31* 40* 49* 50* 32* 57* 61* 33* 45* 56* 54* 66* 51* 66* 60* 32* 67* 54* 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 PERIOD 12/31/08 -01/07/09 01/07/09 -01/14/09 01/14/09 -01/21/09 01/21/09 -01/28/09 0 1/28/09 -02/04/09 02/04/09 -02/11/09 02/11/09 -02/18/09 02/18/09 -02/25/09 02/25/09 -03/04/09 03/04/09 -03/11/09 03/11/09 -03/18/09 03/18/09 -03/25/09 03/25/09 -04/01/09 04/01/09 -04/08/09 04/08/09 -04/15/09 04/15/09 -04/22/09 04/22/09 -04/29/09 04/29/09 -05/06/09 05/06/09 -05/13/09 05/13/09 -05/20/09 05/20/09 -05/27/09 05/27/09 -06/03/09 06/03/09 -06/10/09 06/10/09 -06/17/09 06/17/09 -06/24/09 06/24/09 -07/01/09 07/01/09 -07/08/09 07/08/09 -07/15/09 07/15/09 -07/22/09 07/22/09 -07/29/09 07/29/09 -08/05/09 08/05/09 -08/12/09 08/12/09 -08/19/09 08/19/09 -08/26/09 08/26/09 -09/02/09 09/02/09 -09/09/09 09/09/09 -09/16/09 09/16/09 -09/23/09 09/23/09 -09/30/09 09/30/09 -10/07/09 10/07/09 -10/14/09 10/14/09 -10/21/09 10/21/09 -10/28/09 10/28/09 -11/04/09 11/04/09 -11/11/09 11/11/09 -11118/09 11/18/09 -11/25/09 11/25/09 -12/02/09 12/02/09 -12/09/09 12/09/09 -12/16/09 12/16/09 -12/23/09 12/23/09 -12/30/09 CL-01* 28* 14* 26* 41* 43* 39< 44* 24* 33* 49* 21* 17* 30* 36* 19* 35* 27* 29* 49* 33* 30* 29* 28* 53* 68* 60*<41* 53* 46* 22* 10* 20* 31* 15* 39* 44* 60* 37* 20* 43* 21* 17* 28< 54* 57< 61* 65* 49* 19* 59* 61* 20 GROUP 11 CL-07* 25* 19* 32* 27* 23* 25* 27* 15* 31* 27* 21* 21* 14* 53* 26* 66* 31* 52* 18* 51* 30* 37* 26* 31* 38* 37* 34* 63* 45* 29* 14* 13* 25* 31* 40* 49* 37* 33* 57* 61* 32< 45* 55* 30* 66* 50* 66* 59* 18* 65* 53* 28 CL-08* 58* 44*<41* 36< 43* 62* 62* 22*<46* 35* 40* 37* 17* 31* 33* 66* 39* 51< 41* 50* 54* 66* 61* 31* 39* 67< 34* 63* 25* 29* 14* 31* 24* 17* 39* 48* 61* 32* 56* 60* 33* 44* 55* 53* 66< 52* 65* 61* 32* 66* 53* 49 GROUP III CL-li I* 58* 45* 40* 36< 43* 58* 63* 22* 45* 34* 39* 38* 17* 53* 32* 51< 40* 53< 41* 51* 54* 66* 65* 25* 39* 64* 37* 62* 46* 28* 14* 31* 25* 31* 40* 21* 48* 34* 57* 26* 33< 45* 56* 53* 29*<51* 65* 26* 32* 28* 54* 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 CL-116 COLLECTION PERIOD 01/28/09 02/25/09 03/25/09 04/29/09 05/13/09 05/27/09 06/10/09 06/24/09 07/08/09 07/22/09 08/05/09 08/19/09 09/02/09 09/16/09 09/30/09 10/14/09 10/28/09 11/25/09 12/30/09< 0.7< 0.6< 0.9< 0.6* 0.5< 0.5< 0.5< 0.6* 0.6< 0.5< 0.4< 0.7< 0.6< 0.7* 0.6< 0.4< 0.6< 0.5< 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 PERIOD 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 00 CL-1 16 ** 01/28/09 02/25/09 03/25/09 04/29/09 05/13/09 05/27/09 06/10/09 06/24/09 07/08/09 07/22/09 08/05/09 08/19/09 09/02/09 09/16/09 09/30/09 10/14/09 10/28/09 11/25/09 12/30/09 MEAN< 37< 53< 38< 46< 56< 40< 41< 13< 58< 41<41< 66< 34* 62< 57< 61* 56< 69< 35 1260 +/- 116 1160 +/- 148 1130 +/- 118 1280 +/- 124 1280 +/- 140 1140 +/- 117 1250 +/- 129 1110 +/- 36 1080 +/- 149 1360 +/- 124 1260 +/- 90 1310 +/- 166 1320 +/- 97 1450 +/- 146 1140 +/- 129 1130 +/- 148 1380 +/- 140 1360 +/- 152 1210 +/- 84 1243 +/- 212<4<6< 5<5<6< 5< 6< 1< 6<5<4< 6< 4< 6< 6<7< 6< 7< 4<5<6<5<5<6<6<6<2<6<4<5<7<4<7<6<7<7<6<4*12< 14< 11< 10< 17< 11<13<4<18< 10< 11< 17< 10<15< 16< 16< 16< 14< 10<4<5<6<4<7<5<7<1<5<6<5<8<4<7<6<8<7<6<4< 11< 13< 12<9< 15< 11< 11<3< 15<12< 11< 18<9< 15<13< 18< 16< 14< 7'<5<7<5<5<7<6<6<2<7<5<6<8<5<8<7<7<8<8<4<8< 10<9<9< 11<9< 10<3< 13< 10<8< 10<8< 11< 12< 12< 12* 13<7<4<5<4<5<5<4<5<1<7<4<4<7<4<5<5<7<6<6<3<4<7<5<6<6<5<6<1<8<5<5<6<4<7<7<8<7<6<4< 24< 26< 24< 32< 43< 31< 24<14< 32< 24< 29< 33< 23< 34< 33< 32< 47< 47< 34<5<8<7< 11<9< 10<6<4< 12<6< 10<9<7<8<6< 10*15< 12< 12< 36< 40< 30< 35< 42< 39< 35< 10< 49< 37< 31< 50< 34< 56< 52< 56< 41< 50< 28** 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 lettuce 06/24/09 247 +/- 94 3990 +/- 334 < 11 < 7 < 25 swiss chard 06/24/09 305 +/- 126 8880 +/- 521 < 11 < 15 < 33 cabbage 07/29/09 215 +/- 48 2880 +/- 107 < 3 < 4 < 10 lettuce 07/29/09 298 +/- 90 6710 +/- 205 < 4 < 5 < 13 swiss chard 07/29/09 393 +/- 72 8240 +/- 213 < 6 < 7 < 18 cabbage 08/26/09 636 +/- 204 3520 +/- 595 < 31 < 35 < 71 lettuce 08/26/09 1160 +/- 335 10300 +/- 699 < 27 < 27 < 59 swiss chard 08/26/09 239 +/- 168 7290 +/- 625 < 21 < 22 < 42 broadleaf 09/30/09 970 +/- 129 7580 +/- 302 < 12 < 13 < 31 cabbage 09/30/09 < 46 2760 +/- 114 < 5 < 5 < 13 s swiss chard 09/30/09 123 +/- 40 5690 +/- 159 < 6 < 6 < 18 MEAN 440 +/- 676 6203 +/- 4930 ---CL-115 cabbage 06/24/09 156 +/- 108 4380 +/- 401 < 16 < 16 < 31 lettuce 06/24/09 1050 +/- 194 5570 +/- 553 < 22 < 21 < 55 swiss chard 06/24/09 776 +/- 157 6620 +/- 467 < 18 < 16 < 47 cabbage 07/29/09 < 344 3460 +/- 617 < 29 < 37 < 91 lettuce 07/29/09 445 +/- 93 3660 +/- 182 < 5 < 6 < 13 swiss chard 07/29/09 1200 +/- 119 6860 +/- 240 < 5 < 6 < 15 cabbage 08/26/09 341 +/- 163 3260 +/- 362 < 16 < 18 < 28 lettuce 08/26/09 1770 +/- 270 4160 +/- 458 < 24 < 29 < 52 swiss chard 08/26/09 483 +/- 204 6380 +/- 545 < 24 < 28 < 47 cabbage 09/30/09 216 +/- 44 2690 +/- 108 < 4 < 5 < 12 lettuce 09/30/09 3430 +/- 310 3800 +/- 381 < 11 < 12 < 23 swiss chard 09/30/09 292 +/- 80 6670 +/- 205 < 8 < 8 < 22< 24 < 67< 12 < 18< 15 < 37<3 <8<4 <10<6 <15< 35 < 75< 25 < 59< 24 < 50< 12 <25<5 <11<6 <15< 30 < 49 < 42 < 29 < 29 < 134 < 36< 10 < 13 < 15 <9 < 9 < 44 < 12< 14 < 27 < 23 <13 < 16 < 59 < 13< 4 < 8 < 41 <3 < 4 < 54 < 14< 5 < 9 < 56 <4 < 4 < 73 < 18< 7 < 13 < 53 <5 < 6 < 80 < 19< 35 < 60 < 52 < 28 < 28 < 154 < 54< 31 < 45 < 53 < 26 < 25 < 156 < 43< 31 < 47 < 48 < 21 < 25 < 132 < 38< 14 < 23 < 58 < 11 < 12 < 105 < 28< 6 < 10 < 23 < 5 < 5 < 45 < 12< 7 < 12 < 25 < 5 < 6 < 47 < 13< 164< 54< 78< 25< 52< 29< 171< 236< 157< 79< 37< 34< 20 < 34< 22 < 54< 20 < 42< 26 < 80<5 <10<5 <11< 19 < 40< 27 < 57< 27 < 61<4 <11< 11 < 22<8 <20< 16 < 27 < 30 < 13 < 18 < 65 < 19< 25 < 37 < 37 <19 < 25 < 102 < 21< 18 < 30 < 30 < 16 < 17 < 93 < 24< 46 < 59 < 50 < 25 < 28 < 539 < 125< 6 < 10 < 54 < 4 < 5 < 74 < 21< 6 < 11 < 60 < 5 < 6 < 80 < 21< 20 < 23 < 30 < 16 < 18 < 89 < 24< 32 < 46 < 52 < 22 < 26 < 127 < 27< 34 < 47 < 51 < 27 < 27 < 129 < 44< 6 < 9 < 22 < 4 < 5 < 41 < 11< 13 < 20 < 53 < 10 < 13 < 105 < 28< 9 < 15 < 37 < 7 < 8 < 71 < 18< 99< 148< 103< 196< 28< 35< 104< 177< 156< 30< 70< 54 MEAN 924 +/- 1935 4793 +/- 3054* THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

-m r nmm -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 lettuce 06/24/09 834 +/- 189 4620 +/- 506 < 16 < 17 < 36 swiss chard 06/24/09 555 +/- 156 7900 +/- 595 < 21 < 18 < 49 cabbage 07/29/09 381 +/- 61 2970 +/- 134 < 4 < 4 < 10 lettuce 07/29/09 511 +/- 70 4480 +/- 163 < 4 < 4 < 12 swiss chard 07/29/09 620 +/- 72 7640 +/- 169 < 5 < 5 < 14 cabbage 08/26/09 .234 +/- 79 2210 +/- 215 < 8 < 9 < 20 lettuce 08/26/09 1610 +/- 531 7070 +/- 1020 < 24 < 24 < 51 swiss chard 08/26/09 591 +/- 216 7910 +/- 619 < 22 < 23 < 67 corn Leaves 09/30/09 203 +/- 35 2920 +/- 102 < 4 < 4 < 11 Lettuce 09/30/09 2620 +/- 149 4720 +/- 227 < 8 < 9 < 21 swiss chard 09/30/09 362 +/- 88 8210 +/- 208 < 8 < 9 < 22<8< 18< 22<3<4<5< 10< 26< 33<4<8<8<16 <8 <11 <14 <6 <8 <37 <7<43 < 18 < 32 < 30 < 16 < 19 < 84 < 29< 41 < 18 < 36 < 34 < 17 < 19 < 78 < 21<8 <4 < 7 < 41 < 3 < 4 < 56 < 12<9 <5 <9 <51 <4 <4 <68 <18< 11 < 6 < 10 < 57 < 4 < 5 < 77 < 20< 21 < 9 < 15 < 18 < 9 < 9 < 49 < 12<49 < 18 < 33 < 51 < 16 < 22 < 131 < 28< 71 < 34 < 40 < 51 < 23 < 27 < 146 < 45<9 <4 < 8 < 19 < 3 < 4 < 36 < 9< 18 < 10 < 17 < 55 < 8 < 8 < 87 < 22< 19 < 9 < 16 < 41 < 7 < 8 < 74 < 21< 49< 108< 115< 23< 24< 30< 61< 142< 157< 26< 66< 55 MEAN 725 +/- 1421 5378 +/- 4459 CL-118 cabbage 06/24/09 216 +/- 86 3430 +/- 300 < 11 < 11 < 25 lettuce 06/24/09 982 +/- 267 6120 +/- 758 < 31 < 29 < 71 swiss chard 06/24/09 906 +/- 154 8730 +/- 504 < 18 < 18 < 46 cabbage 07/29/09 527 +/- 206 3270 +/- 315 < 15 < 21 < 47 lettuce 07/29/09 573 +/- 79 5520 +/- 169 < 5 < 6 < 15 swiss chard 07/29/09 1180 +/- 329 10400 +/- 621 < 28 < 35 < 102 cabbage 08/26/09 393 +/- 109 3900 +/- 296 < 14 < 13 < 27 lettuce 08/26/09 1770 +/- 275 7210 +/- 592 < 21 < 23 < 51 swiss chard 08/26/09 713 +/- 247 8570 +/- 752 < 32 < 33 < 75 corn leaves 09/30/09 2110 +/- 165 3210 +/- 246 < 10 < 11 < 25 soybeans 09/30/09 330 +/- 43 3530 +/- 118 < 5 < 5 < 13 swiss chard 09/30/09 547 +/- 106 9080 +/- 279 < 9 < 10 < 26<9< 28< 19< 14<6< 26< 15< 23< 33< 10<5<9< 26 < 12 < 19 < 21 < 10 < 13 < 48 < 14<79 < 31 < 49 < 43 < 26 < 32 < 128 < 33<49 < 18 < 32 < 31 < 16 < 20 < 84 < 22< 32 < 21 < 33 < 58 < 13 < 17 < 350 < 96< 12 < 6 < 11 < 56 < 4 < 5 < 80 < 22< 69 < 42 < 59 < 55 < 25 < 27 < 601 < 141< 32 < 15 < 24 < 24 < 11 < 15 < 69 < 19<43 < 23 < 46 < 46 < 23 < 24 < 119 < 31< 73 < 32 < 48 < 56 < 27 < 30' < 149 < 46< 19 < 12 < 18 < 53 < 9 < 10 < 96 < 26< 12 < 6 < 9 < 25 < 4 < 5 < 43 < 13< 21 < 10 < 18 < 50 < 8 < 8 < 92 < 22< 72< 202< 106< 97< 26< 168< 90< 152< 179< 64< 27< 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 05/20/09 06/03/09 06/17/09 07/01/09 07/15/09 07/29/09 08/12/09 08/26/09 09/09/09 09/23/09 10/07/09 10/21/09 2420 +/- 78 2140 +/- 101 813 +/- 183 1950 +/- 274 2760 +/- 280 2240 +/- 270 1460 +/- 117 2350 +/- 136 2380 +/- 341 1990 +/- 249 1530 +/- 276 2730 +/- 326 8300 +/- 550 4650 +/- 105 < 2 6050 +/- 171 < 5 3110 +/- 334 < 16 4900 +/- 435 < 16 7420 +/- 528 < 15 4100 +/- 429 < 18 4250 +/- 215 < 5 5920 +/- 223 < 8 5940 +/- 583 < 26 5670 +/- 504 < 13 5020 +/- 529 < 27 7080 +/- 643 < 28 7170 +/- 693 < 30<2 <6 <2 <4 <2 <4 <52 <1 <2 <49 <11 <12< 6 < 16 < 5 < 12 <6 < 11 < 50 < 5 < 4 < 74 < 16 < 34< 16 < 34 < 16 < 34 < 16 < 27 < 54 < 14 < 13 < 109 < 25 < 102< 17 < 46 < 18 < 43 < 19 < 33 < 54 < 19 < 19 < 115 < 33 < 119< 17 < 38 < 17 < 39 < 18 < 33 < 56 < 17 < 16 < 113 < 29 < 111< 22 < 50 < 18 < 45 < 21 < 35 < 49 < 17 < 18 < 122 < 29 < 135<6 < 16 < 6 < 12 < 6 < 11 <49 <4 < 5 < 77 < 24 < 28< 9 < 22 < 8 <20 < 10 < 16 < 52 < 7 < 8 < 85 < 21 < 51< 24 < 58 < 27 < 59 <26 <46 < 48 < 22 < 27 < 135 < 26 < 172< 12 < 40 < 16 < 30 < 16 < 31 < 50 < 13 < 11 < 103 < 25 < 99< 25 < 63 < 33 < 56 < 29 < 46 < 51 < 25 < 30 < 134 < 46 < 161< 28 < 67 < 24 < 59 < 28 < 52 < 49 < 26 < 28 < 136 < 31 < 196< 30 < 73 < 29 < 73 < 31 < 55 < 50 < 27 < 32 < 154 < 47 < 217 MEAN 2543 +/- 3624 5483 +/- 2596 -CL-02 05/06/09 05/20/09 06/03/09 06/17/09 07/01/09 07/15/09 07/29/09 08/12/09 08/26/09 09/09/09 09/23/09 10/07/09 10/21/09 1980 +/- 83 5440 +/- 187 1940 +/- 239 3010 +/- 138 2960 +/- 324 2650 +/- 308 2510 +/- 189 2290 +/- 146 4040 +/- 412 3210 +/- 322 1800 +/- 257 3850 +/- 393 4960 +/- 427 5740 +/- 141 < 2 6540 +/- 232 < 5 3830 +/- 329 < 7 6130 +/- 238 < 9 7600 +/- 500 < 15 6510 +/- 595 < 25 5950 +/- 265 < 6 8060 +/- 254 < 9 8040 +/- 709 < 33 4600 +/- 466 < 15 7400 +/- 605 < 26 8670 +/- 703 < 31 6900 +/- 690 < 30<2 <7 <2 <5 <2 <4 <58 <2 <2 <48 <14 <11<6 <14 <5 <11 <6 <10 <49 <4 <5 <62 <19 <28< 6 < 14 < 8 < 17 < 8 < 11 <23 < 6 < 8 < 50 < 10 < 52< 10 < 23 < 9 < 22 < 11 < 17 <28 < 9 < 10 < 62 < 14 < 67< 15 < 41 < 14 < 33 < 13 < 28 < 51 < 13 < 15 < 104 < 25 < 91< 25 < 57 < 21 < 44 < 25 < 46 < 59 < 21 < 23 < 140 < 44 < 137< 7 < 15 < 5 < 12 < 7 < 13 < 58 < 5 < 6 < 86 < 21 < 33< 11 < 26 < 9 < 23 < 11 < 19 < 56 < 9 < 10 < 100 < 25 < 58< 27 < 80 < 39 < 82 < 31 < 55 < 59 < 27 < 28 < 175 < 50 < 213< 15 < 31 < 20 < 41 < 18 < 28 < 59 < 16 < 15 < 121 < 31 < 96< 23 < 55 < 23 < 67 < 24 < 42 < 41 < 23 < 26 < 111 < 36 < 153< 31 < 61 < 31 < 63 < 31 < 49 < 58 < 30 < 30 < 147 < 30 < 201< 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 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-08 05/06/09 05/20/09 06/03/09 06/17/09 07/01/09 07/15/09 07/29/09 08/12/09 08/26/09 09/09/09 09/23/09 10/07/09 10/21/09 1170 +/- 66 1360 +/- 87 848 +/- 194 2100 +/- 145 1930 +/- 223 1790 +/- 258 2050 +/- 109 2640 +/- 179 5930 +/- 419 1140 +/- 209 2770 +/- 260 4630 +/- 337 2620 +/- 357 5360 +/- 126 < 2 < 2 <6 < 2 < 5 < 3 < 5 < 57 < 2 < 2 < 51 < 11 < 11 5320 +/- 154 < 6 < 7 < 19 < 6 < 14 < 8 < 12 < 59 < 5 < 6 < 83 < 23 < 37 3930 +/- 402 < 11 < 10 < 25 < 13 < 26 < 12 < 19 < 33 < 9 < 14 < 73 < 20 < 77 8460 +/- 309 < 11 < 12 < 30 < 11 < 28 < 13 < 22 < 30 < 10 < 11 < 72 < 18 < 76 7010 +/- 435 < 16 < 16 < 36 < 19 < 37 < 17 < 27 < 47 < 15 < 16 < 108 < 26 < 97 6070 +/- 475 < 19 < 17 < 50 < 23 < 44 < 20 < 37 < 49 < 17 < 19 < 113 < 28 < 122 4460 +/- 182 < 5 < 5 < 14 < 6 < 11 < 6 < 9 <47 < 4 < 5 < 71 < 20 < 26 8020 +/- 267 < 9 < 9 <23 < 8 < 20 < 10 < 18 < 54 < 8 < 9 < 99 < 24 < 55 8490 +/- 686 < 28 < 30 < 58 < 23 < 62 < 29 < 50 < 58 < 29 < 27 < 141 < 43 < 201 4330 +/- 563 < 13 < 17 < 35 < 15 < 38 < 17 < 26 < 51 < 14 < 15 < 116 < 27 < 86 6260 +/- 434 < 20 < 22 < 44 < 17 < 48 < 26 < 38 < 43 < 22 < 21 < 104 < 30 < 169 4290 +/- 514 < 23 < 24 < 45 < 21 < 47 < 26 < 43 < 42 < 23 < 25 < 114 < 33 < 151 6970 +/- 642 < 29 < 24 < 52 < 30 < 62 < 24 < 42 < 47 < 24 < 28 < 116 < 36 < 166 n-MEAN 2383 +/- 2891 6075 +/- 3242 -CL-116 05/06/09 05/20/09 06/03/09 06/17/09 07/01/09 07/15/09 07/29/09 08/12/09 08/26/09 09/09/09 09/23/09 10/07/09 10/21/09 1750 +/- 86 1840 +/- 92 1430 +/- 177 2070 +/- 142 2220 +/- 241 3390 +/- 278 1570 +/- 107 2340 +/- 116 1970 +/- 227 1940 +/- 241 1440 +/- 284 1780 +/- 252 4590 +/- 479 5530 +/- 133 <2 < 3 < 8 < 2 <6 < 3 < 5 < 59 < 2 < 2 <62 < 19 < 13 5750 +/- 166 < 5 <6 < 16 <6 < 13 <7 < 11 <55 < 5 < 5 <74 <20 <33 3500 +/- 306 < 14 < 16 < 34 < 16 < 35 < 15 < 28 < 46 < 14 < 15 < 111 < 26 < 83 6700 +/- 278 < 10 < 10 < 23 < 9 < 20 < 10 < 19 < 33 < 9 < 10 < 71 < 17 < 83 7550 +/- 473 < 18 < 17 < 42 < 19 < 39 < 18 < 30 < 58 < 15 < 18 < 116 < 31 < 106 7860 +/- 457 < 22 < 22 < 51 < 22 < 49 < 25 < 38 < 54 < 20 < 21 < 134 < 36 < 124 8360 +/- 238 < 6 < 7 < 17 < 6 < 13 <7 < 12 < 59 < 5 < 5 < 83 < 23 < 34 5290 +/- 189 < 8 < 9 <22 < 8 < 18 < 9 < 16 <47 < 7 < 8 < 82 < 23 < 48 6060 +/- 493 < 21 < 22 < 47 < 22 < 40 < 20 < 35 < 38 < 18 < 21 < 97 < 24 < 117 6850 +/- 476 < 17 < 18 < 41 < 15 < 36 < 15 < 29 < 54 < 14 < 14 < 113 < 35 < 93 8090 +/- 544 < 27 < 27 < 51 < 28 < 62 < 30 < 47 < 45 < 25 .< 25 < 124 < 38 < 160 6770 +/- 582 < 25 < 28 < 55 < 24 < 61 < 24 < 47 < 42 < 23 < 27 < 123 < 34 < 155 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 PERIOD INNER RING+/-2 S.D.OUTER RING SPECIAL INTEREST SUPPLEMENTAL CONTROL JAN-MAR APR-JUN JUL-SEP OCT-DEC 18.3 +/- 2.4 16.9 +/- 2.3 20.6 +/- 3.2 19.0 +/- 2.3 18.9 +/- 1.9 16.9 +/- 0.9 20.6 +/- 2.5 19.7 +/- 1.5 19.0 +/- 2.6 16.8 +/- 2.2 20.1 +/- 3.3 18.5 +/- 1.8 17.7 +/- 3.0 16.2 +/- 2.6 19.7 +/- 3.1 18.5 +/- 2.5 17.9 16.2 19.1 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 ANALYZED MINIMUM INNER RING OUTER RING SPECIAL INTEREST SUPPLEMENTAL CONTROL 64 14.3 63 15.8 28 15.2 56 13.8 4 16.2 PERIOD MAXIMUM 24.5 23.1 22.4 21.9 19.1 PERIOD MEAN+/-2 S.D.18.7 +/- 3.7 19.0 +/- 3.3 18.6 +/- 3.4 18.0 +/- 3.8 17.9 +/- 2.4 PRE-OP MEAN,+/- 2 S.D., ALL LOCATIONS 18 +/- 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-0-2009 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 U 2009 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 E6534-396 E6536-396 E6535-396 Milk Milk Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 102 97.7 pCi/L 14.9 15.6 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 66.7 87.5 275 82.0 111 114 136 112 160 142 120 385 113 149 153 155 118 195 190 79.3 94.9 305 93.7 111 119 128 99.9 156 142 115 371 114 135 145 155 121 189 173 AP Ce-141 Cr-51 Cs-134 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Charcoal 1-131 pCi 82.8 79.4 pCi/L 107 112 pCi/L 19.0 16.7 1.04 0.96 0.84 0.92 0.90 0.88 1.00 0.96 1.06 1.12 1.03 1.00 1.04 1.04 0.99 1.10 1.06 1.00 0.98 1.03 1.10 1.04 0.96 1.14 0.96 0.92 0.97 0.87 0.96 0.95 0.97 1.03 0.99 0.96 1.14 1.13 1.06 1.22 1.16 1.05 1.19 1.36 1.12 0.96 A A A A A A A A A A A A A A A A A A A A A A June 2009 E6742-396 E6743-396 E6745-396 E6744-396 Milk Milk Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs- 134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 98.1 260 389 144.0 185 86.9 133 126 173 298 186 262 101 135 61 83.1 84 137 202 102.0 284 400 166 192 91.9 137 122 175 312 163 231 95 il1 53 79 70 101 180 A A A A A A A A A A A A A A A W A A A N (1)A A AP Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Charcoal 1-131 pCi 92.2 95.8 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 E6898-396 E6900-396 Milk Milk Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 113 pCi/L 17.4 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 89.2 249 213 104.0 172 96.3 201 154 213 154 181 145 71.8 115 62 129 97 110 98.7 107 18.8 98.6 275 221 123 185 99.4 206 147 204 160 161 130 72 109 58 121 98 120 94.1 AP Ce-141 Cr-51 Cs- 134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Charcoal 1-131 E6899-396 pCi 89.5 92.3 pCi/L 131 131 pCi/L 19.3 17.9 1.06 0.93 0.90 0.91 0.96 0.85 0.93 0.97 0.98 1.05 1.04 0.96 1.12 1.12 0.99 1.06 1.06 1.07 0.98 0.92 1.05 0.97 1.00 1.08 0.91 0.96 0.93 0.88 0.91 0.95 1.00 0.99 0.94 0.94 1.00 1.04 0.90 1.02 1.03 0.89 1.17 0.88 1.03 A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A December 2009 E6946-396 E6947-396 E6949-396 Milk Milk Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-1 34 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 79.2 193 512 222 163 200 178 176 326 240 103 290 116 93.4 111 81.0 106 155 135 87.3 202 548 253 179 211 178 178 345 256 103 280 129 91.5 108 90.8 90.8 176 131 AP Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54.Fe-59 Zn-65 Co-60 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 appears to 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 parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.(c) Ratio of Teledyne Brown Engineering to Analytics results.(d) Analytics evaluation based on TBE internal QC limits: A=Acceptable.

Reported result falls within ratio limits of 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 result falls outside the ratio limits of < 0. 70 and > 1.30.D-3 TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 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 Sr-90 Ba-133 Cs-134 Cs-137 Co-60 Zn-65 Gr-A Gr-B 1-131 H-3 Water Sr-89 Sr-90 Ba-133 Cs-134 Cs-1 37 Co-60 Zn-65 Gr-A Gr-B 1-131 H-3 pCi/L 57.4 pCi/L 30.6 pCi/L 55.2 pCi/L 65.8 pCi/L 157 pCi/L 86.4 pCi/L 85.5 pCi/L 47.7 pCi/L 45.2 pCi/L 25.2 pCi/L 19733 pCi/L 64.75 pCi/L 30.30 pCi/L 97.9 pCi/L 76.8 pCi/L 59.9 pCi/L 121, pCi/L 115 pCi/L 19.6 pCi/L 28.5 pCi/L 22.1 pCi/L 16133 48.3 31.4 52.7 72.9 168 88.9 84.4 54.2 43.5 26.1 20300 62.2 30.7 92.9 79.4 54.6 117 99.5 23.2 26.0 22.2 16400 37.8 -55.7 22.9 -36.4 43.4 -58.3 59.5 -80.2 151 -187 80.0- 100 76.0- 101 28.3 -67.7 29.1 -50.8 21.7-30.8 17800 -22300 50.2 -70.1 22.4 -35.6 78.3 -102 65.0 -87.3 49.1 -62.9 105- 131 89.6- 119 11.6-31.1 16.2-33.9 18.4-26.5 14300 -18000 N (1)A A A A A A A A A A A A A A A A A A A A A October 2009 RAD 79 (1) Calculation did not allow for Y-90 ingrowth on the Sr-89 mount NCR 09-14 (a) Teledyne Brown Engineering reported result.(b) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.(c) ERA evaluation:

A=acceptable.

Reported result falls within the Warning Limits. NA=not acceptable.

Reported result falls outside of the Control Limits. CE=check for Error. Reported result falls within the Control Limits and outside of the Warning Limit.D-4 TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPýTELEDYNE 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 09-GrW20 09-MaS20 09-RdF20 09-GrF20 March 2009 09-RdV20 September 2009 09-MaW21 Water Cs-134 Cs-137 Co-57 Co-60 H-3 Mn-54 Sr-90 Zn-65 Water Gr-A Gr-B Soil Cs-134 Cs-1 37 Co-57 Co-60 Mn-54 K-40 Sr-90 Zn-65 AP Cs-134 Cs-1 37 Co-57 Co-60 Mn-54 Sr-90 Zn-65 AP Gr-A Gr-B Vegetation Cs-134 Cs-137 Co-57 Co-60 Mn-54 K-40 Sr-90 Zn-65 Water Cs-134 Cs-1 37 Co-57 Co-60 H-3 Mn-54 Sr-90 Zn-65 Water Gr-A Gr-B Bq/L 18.8 22.5 Bq/L 0.0601 Bq/L 17.0 18.9 Bq/L 16.1 17.21 Bq/L 332 330.9 Bq/L 13.8 14.7 Bq/L 6.88 7.21 Bq/L 13.2 13.6 Bq/L 0.529 0.635 Bq/L 1.87 1.27 Bq/kg 433 467 Bq/kg 649 605 Bq/kg -0.120 Bq/kg 3.91 4.113 Bq/kg 339 307 Bq/kg 644 570 Bq/kg 245 257 Bq/kg 272 242 Bq/sample 2.77 2.93 Bq/sample 1.41 1.52 Bq/sample 1.24 1.30 Bq/sample 1.33 1.22 Bq/sample 2.42 2.2709 Bq/sample 0.713 0.64 Bq/sample 1.30 1.36 Bq/sample 0.188 0.348 Bq/sample 0.313 0.279 Bq/sample 3.48 3.40 Bq/sample 1.15 0.93 Bq/sample 3.12 2.36 Bq/sample

-0.0105 Bq/sample 2.98 2.3 Bq/sample 64.1 Bq/sample 1.09 1.260 Bq/sample 1.73 1.3540 Bq/L 26.5 32.2 Bq/L 37.2 41.2 Bq/L 32.2 36.6 Bq/L 14.0 15.40 Bq/L 705 634.1 Bq/L -0.1015 Bq/L 13.9 12.99 Bq/L 26.2 26.9 Bq/L 1.27 1.047 Bq/L 9.70 7.53 18.5 -29.3 (1)13.2-24.6 12.05 -22.37 231.6 -430.2 10.26 -19.06 5.05- 9.37 9.5- 17.7>0.0 -1.270 0.64-1.91 327 -607 424 -787 (1)(2)215-399 399-741 180 -334 169- 315 2.05 -3.81 1.06-1.98 0.91 -1.69 0.85- 1.59 1.5898 -2.9522 0.448 -0.832 0.95- 1.77>0.0 -0.696 0.140 -0.419 2.38 -4.42 0.65-1.21 1.65 -3.07 (1)1.61 -2.99 (4)0.882 -1.638 0.948- 1.760 22.5 -41.9 28.8 -53.6 25.6 -47.6 10.8-20.0 443.9 -824.3 (1)9.09- 16.89 18.8- 35.0>0.0 -2.094 3.77- 11.30 A A A A A A A A A A A A A A A A A A A A A A A A A A A A W N (3)A W A W A A A A A A A A 09-GrW21 A 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 Cs-134 Cs-137 Co-57 Co-60 Mn-54 K-40 Sr-90 Zn-65 Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg 74.7 0.554 706 606 350 876 425 505 1370-0.02 1.4 5.98 1.01 5.16 0.925 4.39 89.8 62.9-116.7 (1)669 468-870 586 410-762 327.000 229-425 796 557-1035 375 263-488 455 319-592 1178 825-1531 09-RdF21 09-GrF21 09-RdV21 AP Cs-134 Cs-137 Co-57 Co-60 Mn-54 Sr-90 Zn-65 AP Gr-A Gr-B Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample 1.4 6.48 1.03 5.49 0.0835 3.93 (1)0.98- 1.82 4.54 -8.42 0.72-1.34 3.84-7.14 0.585 -1.086 2.75-5.11 A A A A A A A A A A A A A A A A A A A A A A A A Bq/sample 0.357 0.659 >0.0- 1.318 Bq/sample 1.403 1.320 0.66- 1.98 Vegetation Cs-134 Bq/sample Cs-1 37 Bq/sample Co-60 Bq/sample Mn-54 Bq/sample K-40 Bq/sample Sr-90 Bq/sample Zn-65 Bq/sample-0.0027 2.36 2.58 8.36 57.8 1.73-0.59 (1)2.43 1.70-3.16 2.57 1.80 -3.34 7.9 5.5 -10.3 (4)1.78 1.25-2.31 (1)(1) False positive 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 Engineering reported result.(b) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.(c) DOEIMAPEP evaluation:

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 Environmental Operating Report I 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 m ary and Conclusions

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1 I1. Introduction

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3 A. Objectives of the REM P ..................................................................................

3 B. Im plem entation of the Objectives

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3 11. Program Description

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4 A. Sam ple Collection

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4 B. Sam ple Analysis ............................................................................................

6 C. Data Interpretation

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6 D. Program Exceptions

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8 E. Program Changes .........................................................................................

9 IV. Results and Discussion

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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

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

14 2. Terrestrial

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14 a. M ilk ..........................................................................................

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

14 c. Grass .......................................................................................

15 C. Am bient Gam m a Radiation

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15 D. Land Use Survey ..........................................................................................

16 E. Summary of Results -Inter-laboratory Comparison Program ......................

17 V. References

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19 Clinton 2009 Errata Data Section 6 of 60 Appendices Appendix A Tables Table A-1 Appendix B Tables Table B-i: Table B-2: Radiological Environmental Monitoring Report Summary Radiological Environmental Monitoring Program Annual Summary for the Clinton Power Station, 2008 Location Designation, Distance & Direction, and Sample Collection

&Analytical Methods Radiological Environmental Monitoring Program -Sampling Locations, Distance and Direction, Clinton Power Station, 2008 Radiological Environmental Monitoring Program -Summary of Sample Collection, Clinton Power Station, 2008 Figures Figure B-i: Figure B-2: Figure B-3: Figure B-4: Appendix C Tables Table C-1.1 Table C-1.2 Environmental Sampling Locations Within One Mile of the Clinton Power Station, 2008 Environmental Sampling Locations Between One and Two Miles from the Clinton Power Station, 2008 Environmental Sampling Locations Between Two and Five Miles from the Clinton Power Station, 2008 Environmental Sampling Locations Greater Than Five Miles from the Clinton Power Station, 2008 Data Tables and Figures -Primary Laboratory Concentrations of 1-131 in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.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 Table C-11.1 Table C-11.2 Table C-11.3 Table C-111.1 Table C-111.2 Table C-IV.1 Table C-V. 1 Table C-VI.1 Table C-VI.2 Table C-VI.3 Table C-VII.1 Table C-VIII.1 Table C-VIII.2 Table C-IX.1 Table C-IX.2 Table C-X.1 Table C-X.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Tritium in Well Water Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Well Water Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2008.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.Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Clinton Power Station, 2008.Concentrations of Gamma Emitters in Grass Samples Collected in the Vicinity of Clinton Power Station, 2008.Quarterly TLD Results for Clinton Power Station, 2008.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 Fi-gures Figure C-1 Figure C-2 Appendix D Tables Table D-1 Table D-2 Table D-3 Appendix E Summary of the Ambient Dosimetry Program for Clinton Power Station, 2008.Mean Monthly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of CPS, 2008.Mean Quarterly Ambient Gamma Radiation Levels (TLD) in the Vicinity of CPS, 2008.Inter-Laboratory Comparison Program Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)Teledyne Brown Engineering, 2008 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 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.

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 3 NE 4 ENE 5 E 6 ESE 7 SE 8 SSE 9 S 10 SSW 11 SW 12 WSW 13 W 14 WNW 15 NW 16 NNW 1.0 1.3 1.8 1.0 3.2 2.4 1.7 3.0 2.9 0.7 1.6 1.2 1.6 1.6 1.7 2.3 2.1 2.6 1.0 3.3 2.4 2.7 3.0>5.0>5.0 2.3 2.0>5.0 2.3 1.3 3.0>5.0>5.0 1.0>5.0>5.0>5.0 4.1 3.4 3.6 3.4>5.0>5.0>5.0 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 (PCI/LITER) 1-131 H-3 12 16 48 I <LLD 2000 <LLD NA 0<LLD 0 GAMMA BE-7 K-40 MN-54 CO-58 FE-59 NA ND NA 49 (2/24)(28/71)15 <LLD 15 <LLD 30 <LLD ND 106 (3/24)(38/194)<LLD<LLD<LLD 106 (3/12)(38/194)CL-99 CONTROL NORTH FORK ACCESS 3.5 MILES NNE OF SITE 0 ,,)0 0 0 0 0~02 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)

Mnm rm -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 (PCI/LITER)

CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 BA-140 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD 60 <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 t-I F")0 0 0 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) m m ,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 (PCULITER)

LA-140 CE-144 GR-B 15 <LLD NA ND 4 3 (2/12)(1.8/4.1)2000 <LLD<LLD ND DRINKING WATER (PCI/LITER) 12 NA NA 3 (2/12)(1.8/4.1)CL-14 INDICATOR STATION PLANT SERVICE BLDG ONSITE H-3 4 GAMMA BE-7 12 K-40 NA ND NA 183 (1/12)15 <LLD NA NA NA 0 t3 0 0 CD n 0 u,,J 0 ON 183 (1/12)CL-14 INDICATOR STATION PLANT SERVICE BLDG ONSITE MN-54 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 (PCI/LITER)

CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD NA NA NA NA NA NA NA 0 0 0 0 0 0 0 1-131 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 (PCI/LITER)

CS-134 CS-137 BA-140 LA-140 CE- 144 15 <LLD 18 <LLD 60 <LLD 15 <LLD NA ND 200 <LLD NA NA NA NA NA NA 0 0 0 tzý0 0 0 CI)o 0 0 WELL WATER (PCI/LITER)

H-3 12 12 GAMMA BE-7 NA ND NA 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 OR 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 WELL WATER (PCI/LITER)

K-40 ON MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 NA ND 15 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD NA NA NA NA NA NA NA 0 0 0 0 0 0 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 WELL WATER (PCI/LITER)

ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 GAMMA BE-7 30 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD NA ND NA NA NA NA NA NA 0 0 0 0 0 0 0 0 * -.1 0 FISH (PCUKG WET)16 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-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 (PCI/KG WET)K-40 NA 3130 (8/8)(2410/3650) 3063 (8/8)(2260/3380) 3130 (8/8)(2410/3650)

CL- 19 INDICATOR END OF DISCHARGE FLUME 3.4 MILES E OF SITE 0 0 00 MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 130 <LLD 130 <LLD 260 <LLD 130 <LLD 260 <LLD NA ND<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 00 CI., 0o 0 00 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-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 (PCI/KG WET)ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 GAMMA BE-7 NA ND 100 <LLD 100 <LLD NA ND NA ND NA ND ND<LLD<LLD ND ND ND 0 0 0 0 0 0 0 ON 0O SEDIMENT (PCIUKG DRY)2 NA ND NA 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 (PCI/KG DRY)K-40 MN-54 CO-58 FE-59 CO-60 ZN-65 NA 8420 (2/2)(6980/9860)

NA ND NA ND NA ND NA ND NA ND NA ND NA NA NA NA NA NA NA 8420 (2/2)(6980/9860)

CL-07B INDICATOR CLINTON LAKE 2.1 MILES SE OF SITE 0 0 0 0 0 0 0J NB-95 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 (PCI/KG DRY)ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 NA ND 150 <LLD 180 <LLD NA ND NA ND NA ND 10 19 (465/468)(6/55)NA NA NA NA NA NA 0 0 0 0 0 0 0 00-C 0 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 520 21 (52/52)(8/110)21 (52/52)(81110)CL-I l CONTROL AMERENIP SUBSTATION 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 (E-3 PCI/CU.METER) k)GAMMA BE-7 K-40 CO-60 NB-95 ZR-95 RU-103 RU-106 NA 89 79.8 (31/36) (3/4)(47.8/186)

(62.1/104) 112.7 (4/4)(58.9/186)

CL-08 INDICATOR DEWITT CEMETERY 2.2 MILES E OF SITE 0 0 NA ND NA ND NA ND NA ND NA ND NA ND ND ND ND ND ND ND 40 0 0 I'Q 0 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 AIR PARTICULATE (E-3 PCI/CU.METER)

CS-134 CS-137 CE-141 CE-144 GAMMA 1-131 50 <LLD 60 <LLD NA ND NA ND<LLD<LLD 0 0 ND ND AIR IODINE (E-3 PCI/CU.METER)

MILK (PCULITER) 520 70 <LLD I NA<LLD<LLD 0 0 0 0 CD 0 0 01-131 20 20 GAMMA BE-7 NA NA 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 MILK (PCI/LITER)

K-40 MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 1207 1207 (20/20) (20/20)(965/1380)

(965/1380)

ND ND ND ND ND ND CL-1 16 CONTROL PASTURE IN RURAL KENNEY 14 MILES WSW OF SITE 0 0 0 0 0 CD 07 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 (PCU/LITER)

ZR-95 CS-134 CS-137 BA-140 LA-140 CE-144 NA NA 15 NA is NA 60 NA 15 NA NA NA ND 0<LLD<LLD<LLD<LLD ND 0 0 0 0 0 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 (PCUKG WET)GAMMA BE-7 44 NA 406.4 337.1 (30/34) (9/10)(108/2090)

(112/667)NA 4771.8 5035 (34/34) (10/10)(1670/8370)

(2570/7820) 581.1 (10/10)(148/2090) 5281.7 (12/12)(2760/8370)

CL-I 15 INDICATOR SITE'S SECONDARY ACCESS ROAD 0.7 MILES NE OF SITE 0 0 K-40 CL-I 18 INDICATOR SITE'S MAIN ACCESS ROAD 0.7 MILES NNE OF SITE MN-54 CO-58 FE-59 CO-60 ZN-65 NA ND NA ND NA ND NA ND NA ND ND ND ND ND ND 0 0 0 0 4n 0 CD 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 --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 (PCI/KG WET)NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 NA ND NA ND 60 <LLD 60 <LLD 80 <LLD NA ND NA ND ND 0 ND<LLD<LLD<LLD ND ND 0 0 C:)0 0 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) 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 (PCI/KG WET)GRASS (PCI/KG WET)CE-144 GAMMA BE-7 NA ND ND 0 52 00 K-40 MN-54 CO-58 FE-59 CO-60 NA 2152.9 (38/39)(437/5160)

NA 5039.5 (38/39)(3160/8400)

NA ND NA ND NA ND NA ND 1823.1 (13/13)(1160/3080) 4462.3 (13/13)(2430/5590) 2896.9 (13/13)(1310/5160) 5306.9 (13/13)(3480/8400)

CL-02 INDICATOR CLINTON'S MAIN ACCESS ROAD 0.7 MILES NNE OF SITE CL-08 INDICATOR DEWITT CEMETERY 2.2 MILES E OF SITE 0 ND ND ND ND 0 0 0 113 0 0 00 C.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 GRASS (PCI/KG WET)ZN-65 NB-95 ZR-95 1-131 NA ND NA ND NA ND 60 <LLD 60 <LLD 80 <LLD NA ND ND ND ND CS-134 CS-137 BA-140 0 0<LLD<LLD<LLD 0 0 0 0 0 0 ,, 0 0 0 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-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 (PCI/KG WET)LA-140 CE-144 NA ND NA ND ND ND ,>-.0O 0 0 DIRECT RADIATION (MILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 216 NA 19.9 (212/212)(15.7/25.3) 19.3 (4/4)(17.3/21.6) 21.6 (4/4)(19.2/25.3)

CL-58 INDICATOR 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 CL-90 CL-91 CL-99 Salt Creek Bridge on Rt. 10 (indicator)

Discharge Flume (indicator)

Parnell Boat Access (control)North Fork Access (control)3.6 miles SW 0.4 miles SE 6.1 miles ENE 3.5 miles NNE B. Drinking (Potable)

Water CL-14 Station Plant Service Bldg (indicator) onsite C. Well Water CL-07D CL-12T CL-12R Mascoutin Recreation Area (indicator)

DeWitt Pump House (indicator)

D. Milk -bi-weekly

/ monthly CL-116 Dement Dairy (control)E. Air Particulates

/ Air Iodine CL-01 CL-02 CL-03 CL-04 CL-06 CL-07 CL-08 CL-11 CL-15 CL-94 Camp Quest Clinton's Main Access Road Clinton's Secondary Access Road Residence Near Recreation Area Clinton's Recreation Area Mascoutin Recreation Area DeWitt Cemetery Illinois Power Substation (Control)Rt. 900N Residence Old Clinton Road End of Discharge Flume (indicator)

Lake Shelbyville (control)2.3 miles ESE 1.6 miles E 1.6 miles E 14 miles WSW 1.8 miles W 0.7 miles NNE 0.7 miles NE 0.8 miles SW 0.7 miles WSW 2.3 miles SE 2.2 miles E 16 miles S 0.9 miles N 0.6 miles E 3.4 miles E 50 miles S F. Fish CL-19 CL-105 G. Shoreline Sediment CL-07B Clinton Lake (indicator) 2.1miles SE H. Food Products CL-114 CL-115 CL-117 CL-118 1. Grass Cisco (Control)Site's Secondary Access Road Residence North of Site Site's Main Access Road Camp Quest Clinton's Main Access Road DeWitt Cemetery Pasture in Rural Kenney 12.5 miles SSE 0.7 miles NE 0.9 miles N 0.7 miles NNE 1.8 miles W 0.7 miles NNE 2.2 miles E 14 miles WSW CL-01 CL-02 CL-08 CL-116 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 Radiological Environmental Monitoring Program -Summary of Sample Collection and Analytical Methods, Clinton Power Station, 2008 TABLE B-2: 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 Tables Table A-1: Location Designation of the Annual Radiological Groundwater Protection Program Report (ARGPPR)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 Tables Table B-1.1 Table B-1.2 Table B-11.1 Table B-11.2 Data Tables of the Annual Radiological Groundwater Protection Program Report (ARGPPR)Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Clinton Power Station, 2009.Concentrations of Tritium and Strontium in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2009.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 SITE B-3 B-3 MW-CL-1 MW-CL-1 MW-CL-2 MW-CL-2 MW-CL-121 MW-CL-121 MW-CL-131 MW-CL-131 MW-CL-13S MW-CL-13S MW-CL-13S MW-CL-14S MW-CL-14S MW-CL-151 MW-CL-151 MW-CL-15S MW-CL-15S MW-CL-16S MW-CL-16S MW-CL-1 6S MW-CL- 16S MW-CL-1 7S MW-CL-17S MW-CL-181 MW-CL-181 MW-CL-18S MW-CL-18S MW-CL-19S MW-CL-19S MW-CL-20S MW-CL-20S MW-CL-21 S MW-CL-21S MW-CL-21 S MW-CL-21 S MW-CL-21S MW-CL-22S MW-CL-22S COLLECTION DATE 04/23/09 10/21/09 04/23/09 10/21/09 04/22/09 10/21/09 04/23/09 10/22/09 04/29/09 10/22/09 ORIGINAL 04/22/09 RERUN 04/22/09 10/22/09 04/23/09 10/21/09 04/22/09 10/21/09 04/22/09 10/21/09 ORIGINAL 04/22/09 RECOUNT 04/22/09 RERUN 04/22/09 10/21/09 04/22/09 10/21/09 04/22/09 10/21/09 04/22/09 10/21/09 04/23/09 10/22/09 04/22/09 10/22/09 01/21/09 ORIGINAL 04/23/09 RERUN 04/23/09 07/22/09 10/22/09 04/22/09 10/21/09 H-3 SR-90< 131< 165< 131< 167< 132< 168< 131< 172< 160< 172 230 + 96< 157< 174* 131< 186< 131< 166< 131< 175 217 + 95 380 + 109 309 + 115< 186< 131* 174< 129< 180< 126< 188< 133* 181< 133< 186 933 +/- 170 592 +/- 112 715 +/- 141 578 +/- 110 670 +/- 145< 169* 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 DATE SITE SW-CL-1 SW-CL-1 SW-CL-2 SW-CL-2 SW-CL-4 SW-CL-4 SW-CL-5 SW-CL-5 SW-CL-6 SW-CL-7 H-3 SR-90 04/23/09 10/22/09 04/23/09 10/21/09 04/23/09 10/21/09 04/23/09 10/22/09 10/22/09 10/22/09< 152< 177< 154* 179< 154* 179< 155< 184< 179< 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 SW-CL-1 SW-CL-2 SW-CL-4 SW-CL-5 SW-CL-6 SW-CL-7 COLLECTION Be-7 PERIOD 10122/09 < 37 10/21/09 < 38 10/21/09 < 42 10/22/09 < 18 10/22/09 < 18 10/22/09 < 19 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< 37< 28< 42< 18< 32<15<4<4<4<2<2<2<5<4<5<2<2<2<9<9<8<4<4<4<3<4<5<2<2<2<9<7<8<4<3<4<5<5<5<2<2<2<8<7< 10<4<4<4<4<4<4<2<2<2<4<4<4<2<2<2< 29< 30< 34< 16< 17<16<9<7< 11<6<5<5 U I I I I I I I End of Report I U II I I I

U-603952, 2009 Annual Radiological Environmental Operating Report

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