Text

Annual Radiological Environmental Operating Report for January 1 Through December 31, 2008
	ML091260260
Person / Time
Site:	Clinton
Issue date:	04/30/2009
From:	; Teledyne Brown Engineering Environmental Services
To:	; Exelon Nuclear, Office of Nuclear Reactor Regulation
References
	FOIA/PA-2010-0209, U-603893
	Download: ML091260260 (117)
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Docket No: 50-461 CLINTON POWER STATION Annual Radiological Environmental Operating Report 1 January Through 31 December 2008 Prepared By Teledyne Brown Engineering Environmental Services ExeIWO.

Nuclear Clinton Power Station Clinton, IL 61727 April 2009

Table Of Contents I. Sum m ary and Conclusions ................................................................................................ 1 I1.Intro duc tio n ........................................................................................................................ 3 A. Objectives of the REM P .................................................................................... 3 B. Implem entation of the O bjectives ..................................................................... 3 I1l. Program Description ................................................................................................... 4 A. Sam ple Collection .............................................................................................. 4 B. Sam ple Analysis ................................................................................................ 6 C. Data Interpretation ........................................................................................... 6 D. Program Exceptions ......................................................................................... 8 E. Program Changes ............................................................................................. 9 IV. Results and Discussion ............................................................................................. 10 A. Aquatic Environm ent ...................................................................................... 10

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

2. Drinking Water ..................................... 11

3. G round W ater ...................................................................................... 12

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

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

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

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

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

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

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

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

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

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

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

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

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Table C-I.3 Concentrations of Gamma Emitters, in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-I1.1 Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-II.2 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

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

Table C-l11.1 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table C-1I1.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

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

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

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

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

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

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

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

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

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

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

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

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

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Table C-X.3 Summary of the Ambient Dosimetry Program for Clinton Power Station, 2008.

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

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

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

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

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 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 ground 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 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 dischargeflume - 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.

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 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-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-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 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-116. 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 (CaSO4 ) 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-1 14).

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 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 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 12 nuclides, 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 13 nuclides, 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.

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-1 14 and CL-115 due to late planting and heavy rain with flooding.

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 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 rnRem 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.

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/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-I1.3, 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. Ground 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:

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/m 3 . 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.

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-11, CL-15 and CL-94) and analyzed weekly for 1-131 (Table C-VII.1, 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:

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 (CaSO4 ) 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:

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

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

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

Distance in Miles from the CPS Station HVAC Vent Stack Sector Residence Garden Milk Farm Miles Miles Miles 1 N 0.9 0.9 0.9 2 NNE 1.0 2.3 3.0 3 NE 1.3 2.1 >5.0 4 ENE 1.8 2.6 >5.0 5 E 1.0 1.0 1.0 6 ESE 3.2 3.3 >5.0 7 SE 2.4 2.4 >5.0 8 SSE 1.7 2.7 >5.0 9 S 3.0 3.0 4.1 10 SSW 2.9 >5.0 3.4 11 SW 0.7 >5.0 3.6 12 WSW 1.6 2.3 3.4 13 W 1.2 2.0 >5.0 14 WNW 1.6 >5.0 >5.0 15 NW 1.6 2.3 >5.0 16 NNW 1.7 1.3 1.3 E. Summary of Results - Inter-Laboratory Comparison Program The primary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices for 19 analytes (Appendix D). The PE samples, supplied by Analytics lnc.,

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 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 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 IIon 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

- - rn -, m rn mu - I l - -m r - -

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 SURFACE WATER 1-131 (LOW LVL) 12 I <LLD NA 0 (PCI/LITER)

H-3 16 2000 <LLD <LLD 0 GAMMA 48 BE-7 NA ND ND 0 K-40 NA 49 106 106 CL-99 CONTROL 0 (2/24) (3/24) (3/12) NORTH FORK ACCESS (28/71) (38/194) (38/194) 3.5 MILES NNE OF SITE MN-54 15 <LLD <LLD 0 CO-58 15 <LLD <LLD FE-59 30 <LLD <LLD 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

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 SURFACE WATER CO-60 15 <LLD <LLD 0 (PCI/LITER)

ZN-65 30 <LLD <LLD 0 NB-95 15 <LLD <LLD 0 ZR-95 30 <LLD <LLD 0 CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD BA-140 60 <LLD <LLD 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

-o _i, rn, 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 LA-140 15 <LLD <LLD (PCI/LITER)

CE-144 NA ND ND 0 GR-B 12 4 3 NA 3 CL- 14 INDICATOR 0 (2/12) (2/12) STATION PLANT SERVICE BLDG (1.8/4.1) (1.8/4.1) ONSITE H-3 2000 <LLD NA GAMMA 12 BE-7 NA ND NA K-40 NA 183 NA 183 CL-14 INDICATOR 0 (1/12) (1/12) STATION PLANT SERVICE BLDG ONSITE MN-54 15 <LLD 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)

m, ,* m -m m, =2, i m - - - -: +m -

m lmm*

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

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

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS DRINKING WATER CO-58 15 <LLD NA (PCI/LITER)

FE-59 30 <LLD NA 0 CO-60 15 <LLD NA ZN-65 30 <LLD NA 0 NB-95 15 <LLD NA ZR-95 30 <LLD NA 0 1-131 15 <LLD NA 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m so * *.. at 01 ,

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 CS-134 15 <LLD NA 0 (PCIILITER)

CS-137 18 <LLD NA 0 BA- 140 60 <LLD NA 0 LA-140 15 <LLD NA 0 CE-144 NA ND NA 0 GROUND WATER H-3 12 200 <LLD NA 0 (PCI/LITER)

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

00"i- a - i 1i so (wiia i w -i 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 GROUND WATER K-40 NA ND NA 0 (PCI/LITER)

MN-54 15 <LLD NA 0 CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0 CO-60 15 <LLD NA 0 ZN-65 30 <LLD NA 0 NB-95 15 <LLD NA 0 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 GROUND WATER ZR-95 30 <LLD NA 0 (PCI/LITER)

CS-134 15 <LLD NA 0 CS-137 18 <LLD. NA BA- 140 60 <LLD NA 0 LA-140 15 <LLD NA CE- 144 NA ND NA 0 FISH GAMMA 16 (PCI/KG WET) BE-7 NA ND ND 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

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 FISH K-40 NA 3130 3063 3130 CL- 19 INDICATOR 0 (PCI/KG WET) (8/8) (8/8) (8/8) END OF DISCHARGE FLUME (2410/3650) (2260/3380) (2410/3650) 3.4 MILES E OF SITE MN-54 130 <LLD <LLD 00 CO-58 130 <LLD <LLD 0 FE-59 260 <LLD <LLD CO-60 130 <LLD <LLD ZN-65 260 <LLD <LLD 0 NB-95 NA ND ND ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

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

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH ZR-95 NA ND ND 0 (PCI/KG WET)

CS-134 100 <LLD <LLD 0 CS-137 100 <LLD <LLD 0 BA-140 NA ND ND 0 LA-140 NA ND ND 0 CE-144 NA ND ND 0 SEDIMENT GAMMA 2 (PCI/KG DRY) BE-7 NA ND NA 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

01m a m m in . o i m6 m d w; 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 SEDIMENT K-40 NA 8420 NA 8420 CL-07B INDICATOR 0 (PCI/KG DRY) (2/2) (2/2) CLINTON LAKE (6980/9860) (6980/9860) 2.1 MILES SE OF SITE MN-54 NA ND NA 0 0

CO-58 NA ND NA 0 FE-59 NA ND NA 0 CO-60 NA ND NA 0 ZN-65 NA ND NA 0 NB-95 NA ND NA 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

S*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 # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT ZR-95 NA ND NA 0 (PCI/KG DRY)

CS-134 150 <LLD NA 0 CS-137 180 <LLD NA 0 BA-140 NA ND NA 0 LA-140 NA ND NA 0 CE-144 NA ND NA 0 AIR PARTICULATE GR-B 520 10 19 21 21 CL-Il CONTROL 0 (E-3 PCI/CU.METER) (465/468) (52/52) (52/52) AMERENIP SUBSTATION (6/55) (8/110) (8/110) 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)

miu n m -m - - m-- lowm TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

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

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE GAMMA 40 (E-3 PCI/CU.METER) BE-7 NA 89 79.8 112.7 CL-08 INDICATOR 0 (31/36) (3/4) (4/4) DEWITT CEMETERY (47.8/186) (62.1/104) (58.9/186) 2.2 MILES E OF SITE K-40 NA ND ND 0 CO-60 NA ND ND 0 NB-95 NA ND ND 0 ZR-95 NA ND ND 0 RU-103 NA ND ND 0 RU- 106 NA ND ND 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

M, anm so w t-0 - a -0 -

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

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

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

CS-137 60 <LLD <LLD 0 CE-141 NA ND ND 0 CE- 144 NA ND ND 0 AIR IODINE GAMMA 520 (E-3 PCI/CU.METER) 1-131 70 <LLD <LLD 0 MILK 1-131 20 I NA <LLD 0 (PCI/LITER)

GAMMA 20 BE-7 NA NA ND 0 ND = NOT DETECTED

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

m m....il, l m - n "-- - :m *-- -!m m" w'" ', --

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 LOCATIONWITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)- (LLD) MEASUREMENTS MILK K-40 NA NA 1207 1207 CL- 116 CONTROL 0 (PCI/LITER) (20/20) (20/20) PASTURE IN RURAL KENNEY (965/1380) (965/1380) 14 MILES WSW OF SITE MN-54 NA NA ND 0 CO-58 NA NA ND 0 FE-59 NA NA ND 0 CO-60 NA NA ND 0 ZN-65 NA NA ND 0 NB-95 NA NA ND 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

uman nu m ! m u u m g *,- um - p* 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 # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK ZR-95 NA NA ND 0 (PCI/LITER)

CS-134 15 NA <LLD 0 CS-137 18 NA <LLD 0 BA-140 60 NA <LLD 0 LA-140 15 NA <LLD 0 CE- 144 NA NA ND 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

, m a AM '-9 m m n am-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 VEGETATION GAMMA 44 (PCI/KG WET) BE-7 NA 406.4 337.1 581.1 CL- 115 INDICATOR 0 (30/34) (9/10) (10/10) SITE'S SECONDARY ACCESS ROAD (108/2090) (112/667) (148/2090) 0.7 MILES NE OF SITE K-40 NA 4771.8 5035 5281.7 CL-118 INDICATOR 0 (34/34) (10/10) (12/12) SITE'S MAIN ACCESS ROAD (1670/8370) (2570/7820) (2760/8370) 0.7 MILES NNE OF SITE MN-54 NA ND ND 0 CO-58 NA ND ND 0 FE-59 NA ND ND 0 CO-60 NA ND ND 0 ZN-65 NA ND ND 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE-VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

Sm mI -*mIl*ma m m m 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 # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS VEGETATION NB-95 NA ND ND 0 (PCI/KG WET)

ZR-95 NA ND ND 0 1-131 60 <LLD <LLD 0 CS-134 60 <LLD <LLD 0 CS-137 80 <LLD <LLD 0 BA-140 NA ND ND 0 LA-140 NA ND ND 0 ND = NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

I Im m m - m m m mI "m- m m -Ill m il 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 CE- 144 NA ND ND 0 (PCI/KG WET)

GRASS GAMMA 52

> (PCI/KG WET) BE-7 NA 2152.9 1823.1 2896.9 CL-02 INDICATOR 0 (38/39) (13/13) (13/13) CLINTON'S MAIN ACCESS ROAD 00 (437/5160) (1160/3080) (1310/5160) 0.7 MILES NNE OF SITE K-40 NA 5039.5 4462.3 5306.9 CL-08 INDICATOR (38/39) (13/13) (13/13) DEWITT CEMETERY (3160/8400) (2430/5590) (3480/8400) 2.2 MILES E OF SITE MN-54 NA ND ND 0 CO-58 NA ND ND FE-59 NA ND ND 0 CO-60 NA ND ND 0 ND= NOT DETECTED THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

m m mmmmmm m - m m- - m- -, -- m m-m TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

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

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GRASS ZN-65 NA ND ND 0 (PCI/KG WET)

NB-95 NA ND ND 0 ZR-95 NA ND ND 0 1-131 60 <LLD <LLD 0 CS-134 60 <LLD <LLD 0 CS-137 80 <LLD <LLD 0 BA-140 NA ND ND 0 ND = NOT DETECTED THE MEAN AND2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

I - - m m - - m !- m- Ill -I TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

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

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

CE-144 NA ND . ND 0 I'

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

(15.7/25.3) (17.3/21.6) (19.2/25.3) 4.3 MILES SSW 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)

Intentionally left blank 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, 2008 Location Location Description Distance & Direction From Site A. Surface Water CI-13 Salt Creek Bridge on Rt. 10 (indicator) 3.6 miles SW CL-90 Discharge Flume (indicator) 0.4 miles SE CL-91 Parnell Boat Access (control) 6.1 miles ENE CL-99 North Fork Access (control) 3.5 miles NNE B. Drinkinq (Potable) Water CL-14 Station Plant Service Bldg (indicator) onsite C. Well Water CL-07D Mascoutin Recreation Area (indicator) 2.3 miles ESE CL-12T DeWitt Pump House (indicator) 1.6 miles E CL-12R DeWitt Pump House (indicator) 1.6 miles E 1n Milk - bi-wpe.klv / mnnthlv CL-116 Dement Dairy (control) 14 miles WSW E. - Air Particulates / Air Iodine CL-01 Camp Quest 1.8 miles W CL-02 Clinton's Main Access Road 0.7 miles NNE CL-03 Clinton's Secondary Access Road 0.7 miles NE CL-04 Residence Near Recreation Area 0.8 miles SW CL-06 Clinton's Recreation Area 0.7 miles WSW CL-07 Mascoutin Recreation Area 2.3 miles SE CL-08 DeWitt Cemetery 2.2 miles E CL-11 Illinois Power Substation (Control) 16 miles S CL-15 Rt. 900N Residence 0.9 miles N CL-94 Old Clinton Road 0.6 miles E F. Fish CL-19 End of Discharge Flume (indicator) 3.4 miles E CL-105 Lake Shelbyville (control) 50 miles S G. Shoreline Sediment CL-07B Clinton Lake (indicator) 2.1miles SE H. Food Products CL-114 Cisco (Control) 12.5 miles SSE CL-1 15 Site's Secondary Access Road 0.7 miles NE CL-117 Residence North of Site 0.9 miles N CL-1 18 Site's Main Access Road 0.7 miles NNE

1. Grass CL-01 Camp Quest 1.8 miles W CL-02 Clinton's Main Access Road 0.7 miles NNE CL-08 DeWitt Cemetery 2.2 miles E CL-116 Pasture in Rural Kenney 14 miles WSW B-2

TABLE B-1: 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 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-1: 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 B-4

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

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

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

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

Env. Inc., SPM-1 Sampling Procedure Manual Fish Gamma Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis Spectroscopy collected via electroshocking or other techniques Env. Inc., SPM-1 Sampling Procedure Manual Air Gross Beta One-week composite of TBE, TBE-2008 Gross Alpha and/or gross beta activity in Particulates 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 of TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy 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, 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 Spectroscopy Monthly grab June TBE, TBE-2007 Gamma emitting radioisotopes analysis Products through September Env. Inc., SPM-1 Sampling Procedure Manual Grass Gamma Spectroscopy Biweekly May through TBE, TBE-2007 Gamma emitting radioisotopes analysis 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

Figure B-I Environmental Sampling Locations Within One Mile of the Clinton Power Station, 2008 B-7

Figure B-2 Environmental Sampling Locations Between One and Two Miles of the Clinton Power Station, 2008 B-8

I I

I l bI 52, I 54 I

I I ~Environmental Figure B-3

ampling Locations Between Two and Five miles of the Clinton Power Station, 2008 B-9

Figure B-4 Environmental Sampling Locations Greater than Five Miles of the Clinton Power Station, 2008 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, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-90 PERIOD 12/26/07 - 01/30/08 < 0.7 01/30/08 - 02/27/08 < 0.6 02/27/08 - 03/26/08 < 0.4 03/26/08 - 04/30/08 < 0.5 04/30/08 - 05/28/08 < 0.6 05/28/08 - 06/25/08 < 0.5 06/25/08 - 07/30/08 < 0.8 07/30/08 - 08/27/08 < 0.9 08/27/08 - 09/24/08

0.9 09/24/08 - 10/29/08

0.9 10/29/08 - 11/26/08 < 0.8 11/26/08 - 12/31/08 < 0.6 MEAN TABLE C-1.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-90 CL-13 CL-91 CL-99 PERIOD U

01/30/08 - 03/26/08 < 177 < 176 < 179 < 177 04/30/08 - 06/25/08 < 190 < 184

191 < 189 07/31/08 - 09/24/08 < 144 < 128 < 141 < 131 09/24/08 - 12/31/08 < 178 < 149

178

177 MEAN C-1

m m m- - m m m m m--m m m m - m -

TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS INSURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA STO 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 12/26/07 - 12/26/07 < 31 < 58 < 3 <4 < 8 <4 <7 < 4 < 8 <3 <4 <28 <5 <27 01/30/08 -01/30/08 <60 < 63 < 8 <7 < 13 <7 < 13 < 7 < 11 <7 < 7 <23 < 10 <45 02/27/08 -02/27/08 < 19 < 10 <2 <2 <4 <2 < 5 < 2 < 4 <2 < 2 < 10 <4 < 18 03/26/08 -03/26/08 <44 < 115 <6 <6 < 11 <8 < 11 < 5 < 10 <5 < 6 <25 <6 < 51 04/30/08 -04/30/08 < 52 < 53 < 7 <6 < 15 <6 < 11 < 7 < 10 <6 < 6 <28 <9 < 37 05/28/08 -05/28/08 < 35 < 96 < 5 <5 < 13 < 5 < 12 < 5 < 9 <5 < 5 < 33 <9 < 32 06/25/08 -06/25/08 <47 < 53 < 5 <5 < 11 < 5 < 12 < 5 < 9 <4 < 5 < 36 < 12 < 38 07/30/08 -07/30/08 <46 <45 <6 <5 < 12 <4 < 10 < 6 < 9 <4 < 5 < 32 < 12 < 39 08/27/08 -08/27/08 < 17 28 +/- 27 <2 <2 <4 <2 <3 < 2 < 3 < 1 < 2 <21 < 6 < 11 09/24/08 -09/24/08 < 20 < 18 <2 <2 < 5 <2 < 4 < 2 < 4 <2 < 2 < 19 < 6 < 16 10/29/08 - 10/29/08 < 9 < 8 < 1 < 1 <2 < 1 <2 < 1 < 2 < 1 < 1 < 18 <6 <6 11/26/08 - 11/26/08 < 15 < 11 < 1 <2 < 3 < 1 < 2 < 1 < 3 < 1 < 1 < 17 <5 < 10 MEAN - 28+/-0 - - - - - - - - - - -

CL-90 12/26/07 -01/30/08 < 36 -<48 <4 <4 < 8 <4 < 9 < 3 < 8 <3 <4 < 14 < 5 < 30 01/30/08 -02/27/08 <28 < 29 < 3 <3 < 7 <4 < 8 < 3 < 6 <3 < 3 < 16 <6 <20

-02/27/08 -'03/26/08 <47 < 119 < 5 <6 < 11 <6 < 10 < 7 < 11 <5 < 6 <23 <9 <43 03/26/08 -04/30/08 < 63 71 62 <6 <6 < 14 <7 < 13 < 7 < 10 <5 < 6 < 31 < 12 <47 04/30/08 - 05/28/08 <43 < 83 <4 <5 < 8 <5 < 9 <4 < 9 <4 < 5 <25 <9 < 33 05/28/08 - 06/25/08 <45 < 38 < 5 <5 < 11 <4 < 8 < 6 < 8 <5 < 5 < 32 <9 <42.

06/25/08 -07/30/08 < 39 < 34 <4 <4 < 8 <4 < 8 < 5 < 6 <4 <4 <27 <6 < 37 07/30/08 - 08/27/08 < 16 < 11 < 1 < 1 < 3 < 1 < 3 < 2 < 3 < 1 < 1 <20 <6 < 12 08/27/08 - 09/24/08 < 17 < 15 < 1 <2 < 4 <2 < 3 < 2 < 3 < 2 < 2 < 17 <6 < 12 09/24/08 - 10/29/08 < 10 < 5 < 1 < 1 <2 < 1 < 1 < 1 < 2 < 1 < 1 < 16 <4 <7 10/29/08 - 11/26/08 <20 < 16 <2 <2 < 5 <2 <4 < 2 <4 <2 < 2 <20 <6 < 14 11/26/08 - 12/31/08 < 30 < 22 < 3 < 3 < 7 <3 < 6 < 3 < 6 < 3 < 3 <26 < 9 <22 MEAN - 71+/-0 - - - - - - - - - - - -

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

- m m m m. = -m m =

m-- = = m-TABLE C-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED INTHE VICINITY OF CLINTON POWER STATION, 2008 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-91 12/26/07 - 01/30/08

36 < 95 <4 <5 <9 <6 <11 <4 <8 <4 <5 < 20 <6 < 35 01/30/08 - 02/27/08 < 47 < 57 <6 <6 < 13 <6 < 12 <6 < 12 <6 <6 < 27 < 10 < 47 02/27/08 - 03/26/08 < 51 < 126 <5 <5 < 13 <5 < 14 <7 <9 <7 <7 < 26 < 11 < 42 03/26/08 - 04/30/08 < 54

61 <4 <6 < 12 <5 <12 <7 <9 <6 <6 < 28 <8 < 42 04/30/08 - 05/28/08 < 41 < 76 <4 <4 <9 <4 <9 <4 <6 <4 <4

28 <9 < 32 05/28/08 - 06/25/08 < 45 < 38 <5 <4 < 11 <4 < 11 <6 <9 <4 <5 < 34 < 11 < 34 06/25/08 - 07/30/08 < 41 < 86 <5 <5 < 10 <4 < 10 <4 <8 <4 <4 < 24 <7 < 32 07/30/08 - 08/27/08 < 14 < 13 <1 <1 <3 <1 <2 <2 <3 <1 <1 < 17 <5 < 10 08/27/08 - 09/24/08 < 19 < 15 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 19 <6 < 14 09/24/08 -10/29/08 <8 < 14 <1 <1 <2 <0 <1 <1 <1 <1 <1 <15 <4 <5 10/29/08 - 11/26/08 < 13 < 35 <1 <1 <3 <1 <3 <2 <3 <1 <1 <18 <6 <9 11/26/08 - 12/31/08 < 31 < 30 <3 <3 <7 <3 <6 <4 <6 <3 <3 <29 <8 < 22 MEAN CL-99 12/26/07 - 01/30/08 < 50 194 + 61 <6 <5 < 14 <6 < 12 <5 < 11 <6 <7 < 22 <9 < 37 01/30/08 - 02/27/08 < 50 < 40 <6 <5 < 13 <5 < 15 <7 < 10 <5 <6 < 21 <6 < 48 02/27/08 - 03/26/08 < 44 < 81 <5 <4 <9 <3 < 10 <4 <7 <4 <4 < 24 <7 < 34 03/26/08 - 04/30/08 < 40 < 45 <4 <4 < 10 <5 <9 <5 <9 <5 <5 < 22 < 10 < 36 04/30/08 - 05/28/08 < 12

27 <1 <1 <3 <1 <3 <1 <2 <1 <1 <8 <2 < 10 05/28/08 - 06/25/08 < 48 < 46 <5 <5 < 13 <5 <8 <5 <9 <5 <5 < 33 < 10 < 36 06/25/08 - 07/30/08 < 56 86 + 75 <4 <5 < 11 <5 < 12 <6 < 11 <5 <6 < 35 < 13 < 46 07/30/08 - 08/27/08 < 16 < 11 <1 <2 <4 <1 <3 <2 <3 <1 < 1 < 22 <6 < 12 08/27/08 - 09/24/08 < 17 38 + 26 <2 <2 <4 <2 <3 <2 <3 <2 <2 < 18 <6 < 12 09/24/08 - 10/29/08 <8 <6 <1 <1 <2 <1 <1 <1 <1 <1 <1 < 14 <5 <4 10/29/08 - 11/26/08 < 16 < 17 <1 <2 <4 <1 <3 <2 <3 <1 <1 < 20 <8 < 11 11/26/08 - 12/31/08 < 30 < 25 <3 <3 <8 <3 <6 <3 <6 <3 <3 < 26 <9 < 23 MEAN 106 + 160

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

TABLE C-I1.1 CONCENTRATIONS OF GROSS BETA IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-14 PERIOD 12/26/07 - 01/30/08 < 2.1 01/30/08 - 02/27/08 .< 2.0 02/27/08 - 03/26/08 < 1.9 03/26/08 - 04/30/08 < 1.8 04/30/08 - 05/28/08 4.1 +/- 2.5 05/28/08 - 06/25/08 < 2.8 06/25/08 - 07/30/08 < 2.0 07/30/08 - 08/27/08 < 2.7 08/27/08 - 09/24/08 < 2.0 09/24/08 - 10/29/08 1.8 +/- 1.2 10/29/08 - 11/26/08 < 1.8 11/26/08 - 12/31/08 < 1.9 MEAN 3.0 +/- 3.3 TABLE C-11.2 CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-14 PERIOD 12/26/07 - 03/26/08 < 176 03/26/08 - 06/25/08 < 197 06/25/08 -. 09/24/08 < 149 09/24/08 - 12/31/08 < 179 MEAN THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-4

M. M w M:m - rM = -. - m m = -'=

TABLE C-1I.3 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-14 12/26/07 - 01/30/08 47 183 + 67 < 5 5 11 5 11 5 <9 6 5 5 20 < 7 40 01/30/08 - 02/27/08 55 54 5 7 11 5 12 6 <9 <9 10 5 5 23 42 02/27/08 - 03/26/08 49 61 4 5 13 6 11 5 < 10 9 6 6 26 < 10 34 03/26/08 - 04/30/08 43 127 6 6 15 6 15 7 < 10 9 6 7 27 <9 44 04/30/08 - 05/28/08 47 62 5 5 11 6 11 5 < 10 13 4 6 27 <9 36 05/28/08 - 06/25/08 47 103 4 5 14 7 11 6 <9 14 5 6 34 < 14 35 06/25/08 - 07/30/08 43 26 4 5 9 5 11 5 <8 11 4 5 29 <8 38 07/30/08 - 08/27/08 15 29 1 2 4 1 3 2 <3 12 1 1 18 <6 10 08/27/08 - 09/24/08 20 35 2 2 4 2 4 2 <4 12 2 2 20 <6 18 09/24/08 - 10/29/08 9 20 1 2 1 1 1 <2 15 1 17 <4 5 10/29/08 - 11/26/08 19 41 2 3 2 3 2 <4 13 2 22 < 5 13 11/26/08 - 12/31/08 28 55 3 3 7 3 6 3 <6 15 3 3 27 <8 21 MEAN 183 +/- 0

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

TABLE C-I1.1 CONCENTRATIONS OF TRITIUM IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CL-07D CL-12R CL-12T PERIOD 03/26/08 - 03/26/08

162 < 167 < 191 06/25/08 - 06/25/08 < 175 < 181 < 174 09/24/08 - 09/24/08 < 151 < 143 < 150 12/31/08 - 12/31/08 < 187 < 198 < 194 MEAN C-6

= m- -m m ý m m m m ion 4- m 1 M = -

TABLE C-Ill.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-07D 03/26/08 < 45 50 4 6 9 4 < 10 6 10 5 6 27 9 45 06/25/08 < 25 55 3 3 6 3 <5 3 5 3 3 14 5 21 09/24/08 < 18 17 2 2 5 2 <4 2 3 2 2 18 6 13 12/31/08 < 14 21 3 1 <3 2 3 1 13 4 11 MEAN CL-12R 03/26/08 53 52 5 6 10 6 < 10 6 10 5 6 27 11 43 06/25/08 30 70 3 4 7 4 <7 4 7 3 4 18 6 24 09/24/08 20 17 2 2 5 2 <4 2 4 2 2 20 6 16 12/31/08 17 15 2 2 4 <3 2 3 1 2 16 5 12 MEAN CL-12T 03/26/08 55 115 6 6 15 5 < 14 7 13 5 6 30 9 42 06/25/08 28 69 3 3 8 4 <6 4 6 3 3 16 6 24 09/24(08 14 10 1 1 3 1 <2 1 2 1 1 14 4 11 12/31/08 16 33 2 2 4 2 <3 2 3 2 16 5 12 MEAN

- - ----- - m - -

TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Ce-144 PERIOD CL-105 Bluegill 04/23/08 < 212 3160 +/- 695 < 23 < 30 < 54 < 29 < 49 < 31 < 45 < 25 < 24 < 176 < 51 < 130 Carp 04/23/08 < 291 3140 +/- 559 < 33 < 33 < 84 < 37 < 71 < 41 < 65 < 40 < 35 < 284 < 72 < 200 Crappie 04/23/08 < 372 3230 +/- 810 < 56 < 46 < 107 <44 < 102 < 55 < 83 < 39 <52 <290 < 118 < 229 Largemouth Bass 04/23/08 < 247 3370 +/- 707 < 33 < 36 < 89 < 38 < 88 < 44 < 54 < 35 < 39 < 276 < 56 < 208 Bluegill 10/09/08 < 461 2740 +/- 648 < 45 < 43 < 134 < 23 < 102 < 50 < 82 < 40 < 39 < 1140 < 315 < 239 Carp 10/09/08 < 482 3220 +/- 691 < 37 < 56 < 117 < 45 < 87 < 62 < 96 < 41 < 41 < 1030 < 428 < 239 Crappie 10/09/08 < 590 3380 +/- 726 < 54 < 61 < 130 <47 < 106 < 66 < 126 <45 <46 < 1240 < 346 <248 Largemouth Bass 10/09/08 < 603 2260 +/- 774 < 40 < 55 < 114 < 34 < 96 < 62 < 106 <45 <40 < 1140 < 352 <265 MEAN 3063 +/- 760 0o CL-19 Bluegill 04/23/08 < 404 2880 +/- 781 < 47 < 46 < 115 < 51 < 94 < 55 < 98 < 50 <51 < 240 < 119 < 259 Carp 04/23/08 < 273 3600 +/- 579 < 29 < 28 < 65 < 33 < 66 < 41 < 58 < 32 < 34 < 225 < 61 < 194 Channel Catfish 04/23/08 < 282 3120 +/- 554 < 35 < 31 < 63 < 38 < 74 < 40 < 61 < 29 < 33 < 186 < 79 < 159 Largemouth Bass 04/23/08 < 406 3650 +/- 770 < 42 < 46 < 111 < 37 < 104 < 50 < 99 < 43 < 52 < 315 < 90 < 240 Bluegill 10/09/08 < 489 3270 +/- 722 < 40 < 53 < 127 < 37 < 89 < 62 < 93 < 34 < 44 < 1140 < 311 < 276 Carp 10/09/08 < 335 2410 +/- 660 < 36 < 35 < 125 < 47 < 64 < 48 < 70 < 36 < 34 < 896 < 321 < 202 Channel Catfish 10/09/08 < 472 3190 +/- 760 < 38 < 54 < 133 < 20 < 94 < 58 < 91 < 47 < 41 < 1200 < 245 < 230 Largemouth Bass 10/09/08 < 586 2920 +/- 661 < 49 < 69 < 151 < 42 < 112 < 84 < 120 < 43 < 52 < 1170 < 409 < 300 MEAN 3130 +/- 807

- m l m-W - -lm - mU- nm "n m a -- a -am i -E TABLE C-V.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/KG DRY +/- 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-07B 04/23/08 < 345 9860 +/- 916 < 39 < 37 < 78 < 33 < 96 < 48 < 74 < 35 < 39 < 205 < 52 < 193 10/09/08 < 325 6980 +/- 698 < 37 < 38 < 109 < 29 < 80 < 45 < 75 < 29 < 31 < 448 < 107 < 161 MEAN - 8420 +/- 4073 - - - - -

TABLE C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED INTHE VICINITY OF CLINTON POWER STATION, 2007 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 20+/--4 27 +/-5 25+/-5 20 +/-4 20 +/-5 26 +/-5 U IIULIUO U IIUuIUO 01/09/08 01/16/08 32 +/- 5. 32 +/-5 34 +/- 5 33 +/- 5 31 +/- 5 32 +/-5 01/16/08 01/23/08 28 +/- 5 27 +5 29 +/- 5 22 +/- 5 28 +/- 5 27 +/-5 01/23/08 01/30/08 32 +/- 5 32 +/-5 35 +/- 5 35 +/- 5 34 +/- 5 32 :5 01/30/08 02/06/08 19 +/- 4 20 +/-4 22 +/- 5 21 +/- 4 22 +/- 5 25 +/-5 02/06/08 02/13/08 30 +/- 5 29 +/-5 28 +/- 5 26 +/- 5 31 +/- 5 31 +/-5 02/13/08 02/20/08 23 +/- 5 28 +/-5 23 +/- 5 29 +/- 5 24 +/- 5 27 45 02/20/08 02/27/08 15 +/- 4 25 +/-14 16 +/- 4 14 +/- 4 16 +/- 4 16 +/-4 02/27/08 03/05/08 17 +/- 4 20 +/-5 19 +/- 4 17 +/- 4 17 +/- 4 18 +/-4 03/05/08 03/12/08 28 +/- 5 26 +/-5 26 +/- 5 24 +/- 5 27 +/- 5 24 +/-5 03/12/08 03/19/08 16 +/- 4 19 +/-4 17 +/- 4 16 +/- 4 16 +/- 4 16 +/-4 03/19/08 03/26/08 14 +/- 4 17 +/-4 13 +/- 4 11 +/-4 15 +/- 4 12 +/-4 03/26/08 04/02/08 12 +/- 4 13 +/-4 11 +/-4 10+/- 4 9+/-4 14 +/-4 04/02/08 04/09/08 14 +/- 4 16 +/-4 12+/- 4 16+/- 4 16+/- 4 17 +/-4 04/09/08 04/16/08 9+/-4 9 +/-3 11 +/-4 9+/-3 11 +/-4 10 +/-4 04/16/08 04/23/08 16+/- 4 20 +/-4 19+/- 4 17 4 21 +/- 4 17 +/-4 04/23/08 04/30/08 20+ 5 17 +/-5 15 4 13 +/-5 16 +/- 4 18 +/-4 04/30/08 05/07/08 13 4 16 +/-4 14 +/-.4 16+/- 4 16 +/- 4 15 +/-4 05/07/08 05/14/08 8+/-4 <5 8+/-4 9+/-4 7+/-4 9 +/-4 05/14/08 05/21/08 12+/- 4 11 +/-4 12+/- 4 13+/- 4 10+/- 4 8 +/-3 05/21/08 05/28/08 6+/-3 8 +/-4 9+/-3 6+/-3 10+/- 4 8 +/-3 05/28/08 06/04/08 16+/- 5 17 +/-5 18 5 15 +/-5 10+/- 4 17 +/-5 06/04/08 06/11/08 12+/- 4 8 +/-4 11 +/-4 9+/-4 10+/- 4 11 +/-4 06/11/08 06/18/08 10+/- 4 15 +/-4 10 4 12+/- 4 12 +/- 4 13 +/-4 06/18/08 06/25/08 16+/- 4 16 +/-4 15 4 20 +/- 4 12 +/- 4 15 +/-4 06/25/08 07/02/08 11+/- 4 15 +/-4 10+/- 4 15 +/- 4 10 +/- 4 11 +/-4 07/02/08 07/09/08 11+/- 4 16 +/-4 12 4 11 +/-4 10 +/- 4 16 +/-4 07/09/08 07/16/08 .17 +/- 4 19 +/-4 16+/-4 14+/- 4 12 +/- 4 29 +/-8 07/16/08 07/23/08 27+/- 5 22 +/-5 21 +/-5 29 +/-5 22 +/- 5 22 +/-5 07/23/08 07/30/08 13+/- 4 15 +/-4 16 4 17+/- 4 15 +/- 4 20 +/-4 07/30/08 08/06/08 18+/- 4 24 +/-5 19+/- 4 23 +/-4 21 +/- 4 21 +/-4 08/06/08 08/13/08 17 4 20 +/-4 17 4 18+/- 4 .17 +/- 4 18 +/-4 08/13/08 08/20/08 19+/- 4 24 +4 21 +/-4 24 +/-5 22 +/- 4 20 +/-4 08/20/08 08/27/08 '23 +/- 4 22 +/-4 24 +/-4 22 +/-4 20 +/- 4 25 +/-5 08/27/08 09/03/08 27 +/- 5 28 +/-5 26 +/-5 28 +/-5 23 +/- 5 28 +/-5 09/03/08 09/10/08 17 +/- 4 16 +/-4 21 +/-5 19+/- 4 14 +/- 4 22 +/-5 09/10/08 09/17/08 14 +/- 4 14 +/-4 13+/- 4 13+/- 4 8+/-4 15 +/-4 09/17/08 09/24/08 34 +/- 5 29 +/-5 30 +/- 5 31 +/-6 32 +/-5 34 +/-5 09/24/08 10/01/08 37 +/- 6 37 +5 39 +/- 6 37 +/-6 29 +/-5 38 +/-6 10/01/08 10/08/08 23 +/- 5 22 +/-5 21 +/- 5 21 +/-5 20 +/-5 24 +/-5 10/08/08 10/15/08 16 +/- 4 15 +/-4 16+/-4 15+/- 4 15+/- 4 19 +/-4 10/15/08 10/22/08 13 +/- 4 14 +/-4 15 +/- 4 18+/- 4 15+/- 4 18 +/-4 10/22/08 10/29/08 8+/-4 13 +/-4 11 +/-4 12 4 11 +/-4 10 +/-4 10/29/08 11/05/08 34+/- 5 34 +/-5 31 +/-5 34 +/-5 31 +/-5 30 +/-5 11/05/08 11/12/08 14+/- 4 11 +/-4 15+/- 4 13 4 14+/- 4 15 +/-4 11/12/08 11/19/08 19+/- 5 18 +/-4 21 +/-5 16+/- 4 17+/- 4 22 +/-5 11/19/08 11/26/08 21+/- 5 22 +/-5 19+/- 4 18 +/- 4 18+/- 4 17 +/-4 11/26/08 12/03/08

20 +/- 5 23 +/-5 19 +/- 5 25 +/- 5 21 +/-5 18 +/-4 12/03/08 12/10/08 22 +/- 4 24 +/-5 21 +/- 4 22 +/- 4 19+/- 4 23 +/-5 12/10/08 12/17/08 26 +/- 5 29 +/-5 20 +/- 5 25 +/- 5 26 +/-5 28 +/-5 12/17/08 12/24/08 31 +/- 5 28 +/-5 28 +/- 5 35 +/- 4 31 +/-5 30 +/-5 12/24/08 12/31/08 33 +/- 5 31 +5 26 +/- 5 19 +/- 6 28 +/-5 34 +/-5 MEAN 19 +/- 16 21 +/- 14 19 +/- 14 19 +/- 15 18 +/- 15 20 +/- 15

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-10

TABLE C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2007 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP 11 I GROUP III PERIOD CL-01 CL-07 CL-08 CL-il1 **

01/02/08 - 01/09/08 23+/- 5 23+/-5b 25+/-5r 01/09/08 - 01/16/08 32 +/- 33 +/- 5 29 +/- 5 31 +/- 5 01/16/08 - 01/23/08 23 +/- 27 +/- 5 30 +/- 5 28 +/- 5 01/23/08 - 01/30/08 32 +/- 30 +/- 5 29 +/- 5 28 +/- 5 01/30/08 - 02/06/08 27 +/- 14 +/- 4 19 +/- 4 23 +/- 5 02/06/08 - 02/13/08 28 +/- 25 +/- 5 28 +/- 5 29 +/- 5 02/13/08 - 02/20/08 25 +/- 28 +/- 5 26 +/- 5 23 +/- 5 02/20/08 - 02/27/08 15 +/- 13 +/- 4 14 +/- 4 16 +/- 4 02/27/08 - 03/05/08 ,19 +/- 19 +/- 4 22 +/- 4 20 +/- 4 03/05/08 - 03/12/08 24 +/- 23 +/- 5 27 +/- 5 25 +/- 5 03/12/08 - 03/19/08 17 +/- 17 +/- 4 15 +/- 4 17 +/- 4 03/19/08 - 03/26/08 14 +/- 14 +/-4 16 +/- 4 11 +/-4 03/26/08 - 04/02/08 13 +/- 11 +/-4 14 +/- 4 11 +/-4 04/02/08 - 04/09/08 16 +/- 16 +/-4 16 +/- 4 15 +/-4 04/09/08 - 04/16/08 9+/- 8+/-3 10 +/- 4 8+/-3 04/16/08 - 04/23/08 15+/- 16 +/-4 21 +/- 4 19 +/-4 04/23/08 - 04/30/08 21+/- 16 +/-4 16 +/- 4 14 +/-4 04/30/08 - 05/07/08 16+/- 11 +/-4 13 +/- 4 15 +/-4 05/07/08 - 05/14/08 9+/- 9+/-4 10 +/- 4 9+/-4 05/14/08 - 05/21/08 16+/- 11 +/-4 15 +/- 4 13 +/-4 05/21/08 - 05/28/08 <4 7+/-3 8+/-3 9+/-3 05/28/08 - 06/04/08 16+/- 15 +/-5 19 +/-5 17 +/-5 06/04/08 - 06/11/08 12+/- 9+/-4 8+/-4 10 +/-4 06/11/08 - 06/18/08 13+/- 15 +/-4 15 +/-4 18+/-4 06/18/08 - 06/25/08 14+/- 12 +/-4 14 +/-4 17 +/-4 06/25/08 - 07/02/08 10+/- 11 +/-4 13 +/-4 12 +/-4 07/02/08 - 07/09/08 10 12 +/-4 12 +/-4 16 +/- 4 07/09/08 - 07/16/08 12+/- 12 +/-4 17 +/-4 17 +/- 4 07/16/08 - 07/23/08 22+/- 24 +/-5 22 +/-5 110 +/- 21(1 07/23/08 - 07/30/08 15+/- 15 +/-4 16 +/-4 14 +/-4 07/30/08 - 08/06/08 18+/- 21 +/-4 18 +/-4 18 +/-4 08/06/08 - 08/13/08 18+/- 10 +/- 4 20 +/-4 19 +/-4 08/13/08 - 08/20/08 19+/- 20 +/- 4 25 +/-5 26 +/-5 08/20/08 - 08/27/08 15+/- 18 +/- 4 19 +/-4 25 +/-5 08/27/08 - 09/03/08 29 +/- 26 +/- 5 28 +/-5 33 +/-5 09/03/08 - 09/10/08 15 +/- 16 +/- 4 21 +/-5 15 +/-4 09/10/08 - 09/17/08 13 +/- 11 +/-4 14 +/-4 15 +/-4 09/17/08 - 09/24/08 28 +/- 31+/- 5 33 +/-5 28 +/-5 09/24/08 - 10/01/08 29 +/- 32 +/-5 35 +/-5 39 +/-6 10/01/08 - 10/08/08 24 +/- 18 +/-4 23 +/-5 25 +/-5 10/08/08 - 10/15/08 19 +/- 12 +/-4 15 +/- 4 19 +/-4 10/15/08 - 10/22/08 19 +/- 17 +/-4 12 +/- 4 14 +/-4 10/22/08 - 10/29/08 14 +/- 11 +/-4 8+/-4 10 +/-4 10/29/08 - 11/05/08 29 +/- 28 +/-5 32 +/-5 27 +/-5 11/05/08 - 11/12/08 14 +/- 12 +/-4 14 +/-4 13 +/- 4 11/12/08 - 11/19/08 22 +/- 17 +/-4 21 +/-5 16 +/- 4 11/19/08 - 11/26/08 19 +/- 20 +/-4 17 +/-4 21 +/- 4 11/26/08 - 12/03/08 17 +/- 19 +/-5 19 +/-4 20 +/- 5 12/03/08 - 12/10/08 27 +/- 20 +/-4 19 +/-4 22 +/- 5 12/10/08 - 12/17/08 20 +/- 29 +/-5 24 +/-5 26 +/- 5

'12/17/08 - 12/24/08 30 +/- <4 34 +/-5 32 +/- 5 12/24/08 - 12/31/08 28 +/- 55 +/-6 34 +/-5 30 +/- 5 MEAN 19 +/- 13 18 +/-17 20 +/- 15 21 +/- 29

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

- INDICATES CONTROL STATION (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION c-1lI

m n m n n - m I a m maim own 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,-2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I*- ON-SITE LOCATIONS GROUP lI** - INTERMEDIATE DISTANCE LOCATIONS GROUP III*** - CONTROL LOCATIONS COLLECTION MIN MAX MEAN+ COLLECTION MIN MAX MEAN+/- COLLECTION MIN MAX MEAN+/-

PERIOD 2SD PERIOD 2SD PERIOD 2SD U I IIUL/UO - uJIIOUJUO 20 35 *n

n 0I/o2/08 01130/08 23 33 28 +7 01/02/08 01/30/08 25 31 01/30/08 - 02/27/08 14 31 23 + 11 01/30/08 02127/08 13 28 22 +/- 12 01/30/08 02/27/08 16 29 23 +/- 11 02/27/08 - 04/02/08 9 28 17 +/-10 02/27/08 04/02/08 11 27 18 +9 02/27/08 04/02/08 11 25 17 +/- 12 04/02/08 - 04/30/08 9 21 15 +7 04/02/08 04/30/08 8 21 15 +/-8 04/02/08 04/30/08 8 19 14 +/- 10 04/30/08 - 05/28/08 <5 16 11 +/-6 04/30/08 05/28/08 <4 16 11 +/-6 04/30/08 05/28/08 9 15 11+/- 6 05/28/08 - 07/02/08 8 20 13 +/-6 05/28108 07/02/08 8 19 13 +5 05/28/08 07/02/08 10 18 15 +/- 7 07/02/08 - 07/30/08 10 29 17 +11 07/02/08 07/30/08 10 24 16 +/-9 07/02/08 07/30/08 14 110 39 +/- 94 07/30/08 - 09/03/08 17 28 22 +/-7 07/30/08 09/03/08 10 29 20 +/- 10 07/30/08 09/03/08 18 33 24 +/- 12 09/03/08 - 10/01/08 8 39 25 +/- 20 09/03/08 10/01/08 11 35 23 +/- 18 09/03/08 10/01/08 15 39 24 +/- 24 1,,)

10/01/08 - 10/29/08 8 24 16 +/-9 10/01/08 10/29/08 8 24 16 +/- 10 10/01/08 10/29/08 10 25 17+/- 13 10/29/08 - 12/03/08 11 34 21 +/-13 10/29/08 12/03/08 12 32 20 +/-11 10/29/08 12/03/08 13 27 20 +/- 11 12/03/08 - 12/31/08 19 35 27 +/-9 12/03/08 12/31/08 < 4 55 29 + 20 12/03/08 12/31/08 22 32 27 + 9 01/02/08 - 12/31/08 <5 39 20 +/- 15 01/02/08 - 12/31/08 < 4 55 19 +/- 15 01/02/08 - 12/31/08 8 110 21 +/- 29

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

mIl a, -- - - m - -

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 PERIOD CL-01 01/02/08 - 04/0; ju 40 <c tj <- zo <2 < 11 <13

<3 <3 04/02/08 - 07/022/08 103 + 25 < 34 <3 <4 <4 < 23 <2 <5 < 11

<3 07/02/08 - 10/011/08 < 75 < 42 <2 <6 < 12 < 16

20 <2 < 23 < 13

<3 10/01/08 - 12/311/08 63 + 21 < 42 <2 <3 <5 <3

23 <2 <4 < 12 MEAN 73 +/- 52

<5 <3 CL-02 01/02/08 04/02/08 61 +/- 24 < 43 <2 <5 <7

19 <2 <11 13

<5 <4 04/02/08 07/02/08 82 +/- 33 < 57 <3 <5 <8 < 27 <3 <8 17

< 25 <4 07/02/08 10/01/08 120 +/- 104 < 69 <5 < 11 < 15 < 34 <3 < 36 18

<4 < 3 10/01/08 12/31/08 71 +/- 22 < 55 <4 <5 <8 <5 < 28 <5 15 MEAN 84 +/- 52

<11 <4 CL-03 01/02/08 04/02/08 116 +/- 42 < 52 <2 <7 <8

40 <4 <18 19 04/02/08 07/02/08 134 +/- 29 < 16 <3 <3 <6 <3 <18 <2 <2 <5 11 07/02/08 10/01/08 130 +/- 56 < 45 <3 < 10 < 14 < 17 < 34 <4 <3 < 32 14 10/01/08 12/31/08 68 +/- 18 < 28 <2 <2 <5 <3

24 <2 <2 <4 10 MEAN 112 +/- 60 -

CL-04 01/02/08 04/02/08 48 +/- 30 < 52 <2 <5 <7 <6

24 <3 <2 <10 12 04/02/08 07/02/08 123 +/- 37 < 58 <2 <6 <9 <6 < 35 <3 <3 <7 16 07/02/08 10/01/08 86 +/- 71 < 44 <4 <8 <16 < 17 < 23 <3 <3 < 33 15 10/01/08 12/31/08 53 +/- 30 < 52 <3 <4 <5 <4 < 28 <4 <3 <7 17 MEAN 78 +/- 70 CL-06 01/02/08 04/02/08 71 +/- 30 < 62 <5 <6 <11 <9

30 <3 <3 <13 16 04/02/08 07/02/08 91 +/- 28 < 38 <3 <4 <6 <4 < 23 <3 <2 <7 12 07/02/08 10/01/08 < 109 < 23 <2 < 11 <19 < 21

30 <4 <3 < 39 19 10/01/08 12/31/08 56 +/- 25 < 33 <3 <3 <5 <3 < 22 <2 <2 <3 10 MEAN 73 +/- 36

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

m m-ý m-- m m - - mm - m -

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 PERIOD CL-07 01/02/08 - 04/02/08 < 43 < 39 <2 <5 <8 <7 < 28 <3 <2 < 10 < 12 04/02/08 - 07/02/08 101 +/- 26 < 24 <3 <3 <6 <5 < 25 <3 <2 <6 < 12 07/02/08 - 10/01/08 91 +/- 53 < 27 <3 <8 < 17 < 16 < 24 <3 <2 < 29 < 13 10/01/08 - 12/31/08 78 +/- 34 < 61 <4 <4 <9 <4 < 24 <4 <3 <6 < 14 MEAN 90 +/- 23 CL-08 01/02/08 - 04/02/08 103 +/- 37 < 56 <4 <6 < 10 <8 < 26 <3 <3 < 13 < 16 04/02/08 - 07/02/08 103 +/- 44 < 58 <4 <5 <7 <6 < 23 <4 <3 <7 < 13 07/02/08 - 10/01/08 186 +/- 56 < 48 <3 < 10 < 17 < 21 < 34 <4 <3 < 46 < 21 10/01/08 - 12/31/08 59 +/- 21 < 41 <3 <3 <5 <4 < 25 <3 <2 <4 < 11 MEAN 113 +/- 106 CL-11** 01/02/08 - 04/02/08 73 +/- 31 < 36 <2 <5 <8 <7 < 22 <2 <3 < 12 < 12 04/02/08 - 07/02/08 104 +/- 25 < 52 < 3 <4 <5 < 4 < 21 <3 <2 <6 < 12 07/02/08 - 10/01/08 < 95 < 43 <3 < 10 < 15 < 17 < 32 <3 <3 < 24 < 12 10/01/08 - 12/31/08 62 +/- 24 < 49 <2 <3 <5 <4 < 20 <3 <3 <5 < 12 MEAN 80 +/- 43 CL-15 01/02/08 - 04/02/08 118 +/- 46 < 41 <3 <6 < 12 <7 < 27 <4 <3 < 16 < 19 04/02/08 - 07/02/08 84 +/- 26 < 37 <3 <4 <5 <4 < 23 <3 <2 <5 < 10 07/02/08 - 10/01/08 < 120 < 57 <3 < 14 < 23 < 23 < 39 <4 <2 < 37 < 17 10/01/08 - 12/31/08 63 +/- 30 < 48 <2 <4 <8 <5 < 32 <3 <3 <6 MEAN 88 +/- 56 CL-94 01/02/08 - 04/02/08 62 +/- 33 < 52 <3 <5 <9 <6 < 22 <3 <2 < 10 < 12 04/02/08 - 07/02/08 108 +/- 34 < 47 <2 <5 <7 <4 < 17 <4 <2 <8 < 17 07/02/08 - 10/01/08 < 82 < 21 <3 <8 < 17 < 18 < 30 <3 <2 < 30 < 14 10/01/08 - 12/31/08 72 +/- 18 < 53 <3 <3 <5 <3 < 20 <2 <2 <4 < 11 MEAN 81 +/- 48

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, 2008 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 01/02/08i - 01/16/08

24

24

24 < 24

3ju

30u 01/09/08

20

20

19

19

26

25

- 01/23/08 01/16/08

26

24

26

25

24

25

- 01/230/08 01/23/08

34

34

33

33

36

37

- 02/306/08 01/30/08

36

18

35

33

36

37

- 02/13/08 02/06/08

47

45

47

46

29

28

- 02/20/08 02/13/08

57

57

57

58

53

51

- 02/27/08 02/20/08

31

18

16

28

33

30

- 03/05/08 02/27/08

35

37

34 < 34

36

37

- 03/12/08 03/05/08

59

59

60

59

60

60

- 03/19/08 03/12/08

32

32

32

22

39

20

- 03/26/08 03/19/08

36

36

35

36

29

29

- 04/026/08 03/26/08

31

30

30

29

35

36

- 04/09/08 04/02/08

34

33

34

33

38

38

- 04/16/08 04/09/08

29

28

29

27

40

39

- 04/23/08 04/16/08

62

59

60

60

69

69

- 04/230/08 04/23/08 < 44

43 *<42

45

63

64

- 05/307/08 04/30/08

37

36

38

37

21

37

- 05/14/08 05/07/08

26

25

25

24

27

27

- 05/214/08 05/14/08

43

42

42

42 < 40

41

- 05/28/08 05/21/08

28

31

26

26 < 34

33

- 06/04/08 05/28/08

54

52

52

52

58

58

- 06/11/08 06/04/08

39

37

37

37

40

38

- 06/18/08 06/11/08

38

37

37

36 *<40 < 40

- 06/25/08 06/18/08

44 < 42

43 < 43

39

37

- 07/025/08 06/25/08

63

62

62

62

65

67

- 07/09/08 07/02/08

42

42

43

43

34

33

- 07/16/08 07/09/08

67

66

65

66

31

62

- 07/23/08 07/16/08

32

32

31

31

16

16

- 07/230/08 07/23/08 < 40

40

39

39 < 47

47

- 08/306/08 07/30/08

33

33

32

32

57

58

- 08/13/08 08/06/08

60

60

60

60

48 < 49

- 08/20/08 08/13/08

52

50

52

51

53

54

- 08/27/08 08/20/08

30

31

29

31

57

58

- 09/03/08 08/27/08

58

58

58

58

55

56

- 09/103/08 09/03/08

31

30

30

30

28

29

- 09/17/08 09/10/08

49

49

49 < 49

46

46

- 09/24/08 09/17/08

47

46

46

50

36

36

- 109/01/08 09/24/08

40

37

37

42

70

69

- 10/08/08 10/01/08

65

65

65

63

46

46

- 10/15/08 10/08/08

49

48

48

46

56

56

- 10/22/08 10/15/08

52

52

52

49

49 < 49

- 10/29/08 10/22/08

52

52

51

51

68

67

- 11/05/08 10/29/08

64

61

65

62

47 *<48

- 11/12/08 11/05/08

58

59

58

59

59

60

- 11/19/08 11/12/08

51 < 49

49 *<48

41

41

- 11/26/08 11/19/08

52

52 '<52 < 49

45

45 11/26/08 - 12/03/08

66

66

66

66

61

61 12/03/08 -12/10/08

67

67

66

65

53

53 12/10/08 -12/17/08

62

58

61

60

61

63 12/17/08 -12/24/08

65

63

63

42

65

66 12/24/08 -12/31/08 < 41

40 *<40

55

48

49 MEAN C-i15

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES' COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/-2 SIGMA COLLECTION GROUP II I GROUP III PERIOD CL-01 CL-07 CL-08 CL-11

01/02/08 - 01/09/08 < 14 < 17 < 28 < 28 01/09/08 - 0 1/16/08 < 12 < 15 < 25 < 24 01/16/08 - 01/23/08 < 14 < 13 < 24 < 24 01/23/08 - 01/30/08 <23 < 19 < 35 < 35 01/30/08 - 02/06/08 < 39 < 22 < 34 < 32 02/06/08 - 02/13/08 < 25 < 15 < 28 < 28 02/13/08 - 02/20/08 < 35 < 38 < 51 < 50 02/20/08 - 02/27/08 < 30 < 18 < 30 < 30 02/27/08 - 03/05/08 < 18 < 17 < 37 < 36 03/05/08 - 03/12/08 < 35 < 36 < 60 < 59 03/12/08 - 03/19/08 < 32 < 35 < 38 < 38 03/19/08 - 03/26/08 < 20 < 15 < 29 < 29 03/26/08 - 04/02/08 < 17 < 27 < 35 < 34 04/02/08 - 04/09/08 < 22 < 36 < 21 < 37 04/09/08 - 04/16/08 < 19 < 21 < 39 < 39 04/16/08 - 04/23/08 < 26 < 29 < 68 < 67 04/23/08 - 04/30/08 < 20 < 28 < 64 < 63 04/30/08 - 05/07/08 < 23 < 36 < 37 < 37 05/07/08 - 05/14/08 < 19 < 26 < 27 < 14 05/14/08 - 05/21/08 < 22 < 24 < 42 < 40 05/21/08 - 05/28/08 < 14 < 27 < 33 < 33 05/28/08 - 06/04/08 < 27 < 46 < 58 < 54 06/04/08 - 06/11/08 < 19 < 26 < 38 < 38 06/11/08 - 06/18/08 < 20 < 29 < 40 < 39 06/18/08 - 06/25/08 < 21 < 25 < 38 < 37 06/25/08 - 07/02/08 < 31 < 43 < 67 < 67 07/02/08 - 07/09/08 < 32 < 20 < 33 < 32 07/09/08 - 07/16/08 < 28 < 14 < 32 < 32 07/16/08 - 07/23/08 < 19 < 12 < 16 < 65 (1) 07/23/08 - 07/30/08 < 29 < 26 < 46 < 46 07/30/08 - 08/06/08 < 25 < 24 < 57 < 56 08/06/08 - 08/13/08 < 33 < 39 < 50 < 49 08/13/08 - 08/20/08 < 22 < 23 < 54 < 54 08/20/08 - 08/27/08 < 16 < 24 < 57 < 57 08/27/08 - 09/03/08 < 31 < 30 < 56 < 55 09/03/08 - 09/10/08 < 16 < 23 < 29 < 28 09/10/08 - 09/17/08 < 26 < 37 < 46 < 46 09/17/08 - 09/24/08 < 23 < 23 < 36 < 35 09/24/08 - 10/01/08 < 21 < 56 < 70 < 70 10/01/08 - 10/08/08 < 36 < 25 < 48 < 46 10/08/08 - 10/15/08 < 38 < 23 < 55 < 55 10/15/08 - 10/22/08 < 28 < 38 < 48 < 48 10/22/08 - 10/29/08 < 29 < 45 < 67 < 67 10/29/08 - 11/05/08 < 36 < 37 < 48 < 48 11/05/08 - 11/12/08 < 32 < 47 < 59 < 59 11/12/08 - 11/19/08 < 25 < 27 < 41 < 41 11/19/08 - 11/26/08 < 31 < 24 < 44 < 44 11/26/08 - 12/03/08 < 37 < 34 < 61 < 61 12/03/08 - 12/10/08 < 37 < 26 < 53 < 54 12/10/08 - 12/17/08 < 37 < 34 < 62 < 62 12/17/08 - 12/24/08 < 41 < 34 < 63 < 65 12/24/08 - 12/31/08 < 22 < 39 < 49 < 48 MEAN

INDICATES CONTROL STATION (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-16

TABLE C-VIII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARM COLLECTION CL-116 PERIOD 01/30/08 < 0.9 02/27/08 < 0.8 03/26/08 < 0.7 04/30/08 < 0.5 05/14/08 < 0.7 05/28/08 < 0.9 06/11/08 < 0.7 06/25/08 < 0.4 07/09/08 < 0.6 07/23/08 < 0.7 07/30/08 < 0.7 08/06/08 < 0.6 08/20/08 < 0.9 09/03/08 < 0.7 09/17/08 < 0.7 10/01/08 < 0.6 10/15/08 < 0.8 10/29/08 < 0.9 11/26/08 < 1.0 12/31/08 < 0.6 MEAN C-17

m m - m - - m TABLE C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 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-116** 01/30/08 < 36 1080 +/- 108 <5 <4 < 11 <4 < 11 <5 <8 <4 <5 < 16 <4 < 34 02/27/08 < 50 965 +/- 121 <6 <6 < 12 <7 < 13 <5 <9 <5 <6 < 23 <6 < 41 03/26/08 < 61 1240 +/- 149 < 7 <7 < 16 <7 < 15 <6 < 13 <7 .< 8 < 35 <9 < 61 04/30/08 < 57 1180 +/- 139 < 7 <7 < 15 <6 < 16 <7 < 12 <6 <7 < 31 < 10 < 55 05/14/08 < 88 1160 +/- 214 < 8 < 11 < 21 <9 < 23 < 10 < 16 <9 < 10 < 45 < 11 < 73 05/28/08 < 45 1060 +/- 119 <6 <6 < 14 <6 < 13 <6 < 10 <5 <5 < 32 <9 < 35 06/11/08 < 60 1380 +/- 151 < 6 <7 < 11 <6 < 13 <6 < 11 <6 <6 < 42 < 13 < 52 06/25/08 < 50 1300 +/- 141 < 7 <7 < 14 <6 < 11 <6 < 10 <5 <6 < 34 < 12 < 40 00 07/09/08 < 50 1220 +/- 129 <6 <6 < 14 <6 <.14 <6 <11 <5 <6 < 43 < 10 < 39 07/23/08 < 46 1200 +/- 121 < 4 <5 < 12 <5 < 10 <6 <9 <5 <6 < 24 <7 < 38 07/30/08 < 54 1310 +/- 152 <6 <7 < 15 <8 < 18 <7 < 11 <6 <7 < 33 <9 ,< 46 08/06/08 < 53 1320 +/- 156 < 6 <7 < 12 <4 < 12 <5 <9 <4 <5 < 43 < 11 < 44 08/20/08 < 44 1190 +/- 129 <5 <7 < 12 <6 < 14 <7 < 11 <5 <5 < 32 <12 < 44 09/03/08 < 48 1270 +/- 130 < 6 <6 <15 <5 < 13 <6 < 10 <5 <6 < 34 < 12 < 42 09/17/08 < 45 1250 +/- 104 <4 <5 < 12 <5 < 10 <5 < 10 <4 <4 < 32 < 12 < 34 10/01/08 < 25 1230 +/- 51 <2 <3 <7 <2 <5 <3 <5 <2 <2 < 31 <9 < 18 10/15/08 < 49 1220 +/- 135 <5 <6 < 13 <6 < 12 <7 < 11 <5 <6 < 40 < 15 < 40 10/29/08 < 36 1220 +/- 80 <4 <4 < 11 <4 <9 <5 <8 <3 <4 < 39 < 10 < 32 11/26/08 < 24 1190 +/- 59 <2 <3 <6 <2 <5 <3 <5 <2 <2 < 24 <6 < 19 12/31/08 < 43 1160 +/- 102 < 4 <4 <11 <3 <9 <5 <9 <4 <5 < 27 <6 < 33 MEAN - 1207 +/- 190

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

- INDICATES CONTROL STATION

m ------ m m m m m m - - m TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 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 06/25/08 (1) 06/25/08 (1) 06/25/08 667 +/- 186 7820 +/- 563 < 22 < 23 < 49 < 25 < 51 < 24 < 40 < 56 < 20 < 19 < 109 34 < 137 Substituted Broadleaf Vegetation 07/30/08 305 +/- 43 4270 +/- 109 <7 <8 < 21 <7 < 18 <8 < 14 < 50 < 7 <6 < 79 22 < 42 Cabbage 07/30/08 261 +/- 46 3360 +/- 119 <5 <6 < 16 <5 < 12 <6 < 11 < 36 <4 <6 < 58 17 < 31 Lettuce 07/30/08 368 +/- 34 5810 +/- 104 <3 <4 < 11 <4 <9 <4 <7 < 26 <3 <3 < 41 10 < 23 Swiss chard 08/27/08 112 +/- 54 3950 +/- 140 <3 <4 < 10 <4 <8 <4 <8 < 49 <3 <4 < 59 14 < 26 Cabbage 08/27/08 383 +/- 103 6020 +/- 230 <4 <4 < 12 <4 <9 <5 <9 < 54 <3 <4 < 75 21 < 29 Lettuce 08/27/08 315 +/- 79 7710 +/- 187 <4. <5 < 12 <4 < 10 <5 <8 < 49 <3 <4 < 62. 16 < 22 Swiss chard 09/24/08 < 64 2570 +/- 140 <6 <6 < 15 <6 < 13 <7 < 12 < 37 <5 <6 < 61 18 < 40 Cabbage 09/24/08 386 +/- 101 3630 +/- 195 <8 < 10 < 21 <8 < 20 < 10 < 18 < 50 <8 <8 < 93 29 < 52 Substitute greens for lettuce 09/24/08 237 +/- 65 5210 +/- 205 <8 <9 < 22 <8 < 19 <9 < 15 < 41 <7 <8 < 75 19 < 48 Swiss chard MEAN 337 +/- 302 5035 +/- 3598

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

m m m m m- m m m mm - m TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED INTHE VICINITY OF CLINTON POWER STATION, 2008 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-115 06/25/08 (1) 06/25/08 (1) 06/25/08 2090 +/- 256 6410 507 < 22 < 21 < 46 < 22 < 44 < 22 < 33 < 59 < 18 < 22 < 135 < 41 < 128 Substituted Broadleaf Vegetation 07/30/08 305 +/- 65 3540 138 <6 <7 < 16 <5 < 14 <7 < 12 < 46 <5 <6 < 72 < 20 < 38 Cabbage 07/30/08 682 +/- 101 5210 192 <9 < 10 < 24 <9 < 20 < 11 < 18 < 51 <9 < 10 < 89 < 29 < 55 Lettuce 07/30/08 606 +/- 56 4830 122 <'5 <5 < 13 <4 < 11 <6 <9 < 36 <4 <5 < 54 < 13 < 31 0o Swiss chard 08/27/08 166 +/- 89 5340 190 <4 <4 < 13 <3 <8 <5 <8 < 57 <4 <4 < 73 < 15 < 24 Cabbage 08/27/08 148 +/- 85 6570 240 <4 <5 < 11 <4 < 10 <5 <9 < 53 <3 <4 < 64 < 17 < 21 Lettuce & Soy 08127/08 830 +/- 100 7670 234 <4 <4 < 12 <4 <9 <5 <8 < 58 <4 <5 < 77 < 20 < 24 Swiss chard 09/24/08 359 +/- 54 3270 107 <4 <5 < 13 <5 < 10 <6 <9 < 41 <4 <4 < 59 < 17 < 28 Swiss chard sub for lettuce 09/24/08 252 +/- 65 3440 149 <7 <8 < 18 <7 < 16 <9 < 15 < 41 <7 <8 < 75 < 21 < 45 Cabbage 09/24/08 373 +/- 83 3260 181 <8 <8 < 21 <8 < 18 < 10 < 16 < 43 <7 <8 < 81 < 22 < 51 Swiss chard MEAN 581 +/- 1152 4954 +/- 3151

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

m m - m - m =- - m m - - -

TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 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 06/25/08 < 186 373' 0 +/- 412 < 19 < 20 < 45 < 23 < 53 < 23 < 40 < 56 < 17 < 23 < 134 < 44 < 126 Cabbage 06/25/08 187 +/- 122 236' 0 +/- 343 < 16 < 14 < 44 < 17 < 39 < 17 < 29 < 41 < 14 < 18 < 111 < 21 < 79 Lettuce 06/25/08 < 172 479' 0 +/- 490 < 17 < 15 < 44 < 19 < 42 < 18 < 32 < 49 < 16 < 18 < 109 < 24 < 115 Swiss chard 07/30/08 283 +/- 41 349' 0 +/- 97 <4 <4 < 11 <4 <9 <5 <7 < 29 <3 <4 < 44 < 13 < 24 Cabbage 07/30/08 444 +/- 55 350' 0 +/- 123 <5 <6 < 16 <6 < 13 <6 < 11 <44 <4 <5 < 64 < 18 < 31 Lettuce 07/30/08 470 +/- 58 635' 0 +/- 170 <6 <7 < 19 <6 < 15 <7 < 12 < 44 <5 <6 < 71 < 18 < 35 Swiss chard 08/27/08 108 +/- 46 344' 0 +/- 132 <3 <4 < 10 <3 <7 <4 < 7 < 46 <3 <3 < 58 < 13 < 22 Cabbage 08/27/08 250 +/- 94 611' 0 +/- 229 <4 <5 < 13 <3 <8 <5 <9 < 60 <4 <4 < 70 < 17 < 30 Lettuce 08/27/08 177 +/- 60 629' 0 +/- 167 <4 <4 < 11 <4 <8 <5 <7 < 48 <3 <4 < 65 < 16 < 25 Swiss chard 09/24/08 508 +/- 93 370' 0 +/- 186 <8 <9 < 22 <8 < 19 < 10 < 17 < 51 <7 <9 < 91 < 22 < 53 Cabbage 09/24/08 < 62 167'0 +/- 111 <6 <6 < 16 <5 < 12 <6 < 11 < 39 <5 <6 < 66 < 18 < 40 Lettuce 09/24/08 224 +/- 39 389' 0 +/- 77 <1 <2 <5 <1 <3 <2 <3 < 55 <1 <1 < 49 < 13 <8 Swiss chard MEAN 295 +/- 288 4110 +/- 3004

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

= = m= m - m - = m m-= i TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY-OF CLINTON POWER STATION, 2008 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-118 06/25/08 < 1 88 55510+/-482 < 23 < 24 < 58 < 30 < 54 < 24 42 59 20 < 24 < 142 < 41 < 119 Cabbage 06/25/08 153 +/- 118 30910+/-349 <15 < 18 < 42 < 16 < 36 < 20 27 41 15 < 16 < 114 < 23 < 96 Lettuce 06/25/08 277 +/- 185 66410+/-562 < 22 < 23 < 54 < 24 < 55 < 24 43 59 21 < 19 < 137 < 38 < 117 Swiss chard 07/30/08 297 +/- 46 45510+/-112 < 4 <5 < 12 <4 < 10 <5 9 36 4 < 19 < 54 < 13 < 29 Cabbage 07/30/08 354 +/- 62 32440+/-131 < 5 <6 < 15 <5 < 13 <6 11 47 5 <5 < 70 < 18 < 35 Lettuce 07/30/08 477 +/- 69 61742+/-160 <6 <6 < 18 <6 < 14 <7 12 47 5 <6 < 71 < 19 < 35 Swiss chard 08/27/08 339 +/- 108 56540+/-197 <4 <4 < 11 <2 <8 <4 8 55 3 <3 < 66 < 14 < 23 Cabbage

. 08/27/08 615 +/- 109 83742+/-257 < 4 <5 < 12 <4 < 10 <5 8 60 4 <4 < 68 < 21 < 26 Lettuce 08/27/08 177 +/- 56 68242+/-178 <3 <4 < 10 <3 <8 <4 7 42 3 <3 < 59 < 13 < 20 Swiss chard 09/24/08 251 +/- 67 27642+/-127 <6 <6 < 14 <5 < 12 <6 11 35 5 <5 < 58 < 14 < 38 Cabbage 09/24/08 381 +/- 80 51940+/-176 <8 <9 < 22 <8 < 19 < 10 16 47 8 <8 < 81 < 25 < 52 substitute greens for lettuc e 09/24/08 410 +/- 93 53510+/-215 < 9 <9 < 23 <9 < 19 < 10 17 48 7 <8 < 84 < 22 < 47 Swiss chard MEAN 339 +/- 266 5282 +/- 3337 -

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

m m -l m I,- m I m -/ m - -

TABLE C-IX.2 CONCENTRATIONS OF GAMMA EMITTERS IN GRASS SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 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 05/14/08 < 318 < 158 < 17 < 16 < 39 < 14 <46 < 16 <28 <37 < 16 < 15 < 94 < 29 <86 05/28/08 829 +/- 156 5240 +/- 359 < 13 < 14 < 36 < 16 < 35 < 16 < 24 <35 < 11 < 13 < 86 < 28 <79 06/11/08 1630 +/- 144 4120 +/- 271 < 12 < 11 < 29 < 9 < 27 < 14 < 21 < 31 < 10 < 12 < 75 < 22 <83 06/25/08 1180 +/- 177 3160 +/- 358 < 13 < 16 < 35 < 15 < 36 < 18 < 28 < 40 < 15 < 17 <91 < 27 < 91 07/09/08 950 +/- 136 3960 +/- 319 < 10 < 13 < 28 < 12 < 27 < 13 < 21 < 29 < 9 < 12 < 79 < 22 <77 07/23/08 2270 +/- 67 4360 +/- 119 <4 <5 <11 <5 <11 <5 <8 <10 <4 <5 <24 <6 <33 08/06/08 1750 +/- 73 3620 +/- 128 <5 < 6 < 15 < 5 < 13 <.6 < 10 < 27 < 4 <5 < 49 < 14 < 32 08/20/08 1600 +/- 84 5140 +/- 169 <7 <7. <18 <8 <16 <8 <13 <33 <6 <7 <61 <15 <44 09/03/08 2680 +/- 302 6460 +/- 517 < 20 < 21 < 50 < 24 < 47 < 21 < 40 < 58 < 16 < 20 < 132 < 32 < 122 09/17/08 3470 +/- 159 3620 +/- 210 < 10 < 10 < 25 < 9 < 22 < 11 < 18 <42 < 8 <9 < 83 < 20 <66 10/01/08 1670 +/- 78 3780 +/- 114 < 3 <4 < 10 < 3 < 8 < 4 < 7 < 54 < 3 <3 < 67 < 14 < 22 10/15/08 1080 +/- 154 4020 +/- 306 < 11 < 12 < 31 < 11 < 28 < 13 < 22 < 57 < 8 < 11 < 99 < 22 < 75 10/29/08 2380 +/- 62 6140 +/- 91 <1 <2 <5 <1 <3 <2 <3 <53 <1 <1 <45 <11 <9 MEAN 1791 +/- 1570 4468 +/- 2091

CL-02 05/14/08 2480 +/- 315 4040 +/- 457 .< 19 < 20 < 54 < 21 < 50 < 19 < 32 < 56 < 16 < 18 < 134 < 26 < 126 05/28/08 1310 +/- 147 4810 +/- 319 < 14 < 15. < 34 < 15 < 34 < 15 < 26 < 43 < 13 < 14 < 92 < 26 < 103 06/11/08 1620 +/- 214 4900 +/- 389 < 15 < 16 < 40 < 18 < 38 < 17 < 30 <45 < 14 < 14 < 95 < 29 < 99 06/25/08 1890 +/- 251 4740 +/- 424 < 19 < 21 < 44 < 19 < 40 < 24 < 36 < 59 < 18 < 18 < 129 < 33 < 120 07/09/08 3830 +/- 279 6360 +/- 457 < 18 < 20 < 50 < 20 < 41 < 20 < 32 < 59 < 16 < 19 < 123 < 43 < 110 07/23/08 4950 +/- 126 5170 +/- 195 < 8 <8 < 18 < 8 < 17 <8 < 14 < 16 <7 < 8 < 39 < 11 < 53 08/06/08 5160 +/- 145 5890 +/- 201 < 7 <8 < 21 < 9 < 18 <8 < 15 <41 <7 < 8 < 74 < 21 <43 08/20/08 2190 +/- 105 5430 +/- 171 < 7 <8 < 20 < 8 < 18 <9 < 14 <34 <7 < 7 < 65 < 20 <42 09/03/08 3080 +/- 222 6810 +/- 414 < 16 < 17 < 41 < 17 < 41 < 17 < 29 < 48 < 14 < 16 < 104 < 31 < 94 09/17/08 3920 +/- 200 5020 +/- 281 < 12 < 13 < 32 < 13 < 27 < 13 < 22 < 54 < 11 < 11 < 103 < 30 < 67 10/01/08 2600 +/- 120 5320 +/- 161 < 3 <4 <10 <3 <7 <4 <7 <57 <3 <3 <66 <16 <19 10/15/08 1970 +/- 214 4360 +/- 333 < 9 < 11 < 25 <9 < 21 < 14 < 20 < 54 < 9 < 12 < 109 < 30 <71 10/29/08 2660 +/- 68 6040 +/- 93 < 1 <2 <5 <1 <3 <2 <3 <51 <1 <1 <43 <10 <9 MEAN 2897 +/- 2458 5299 +/- 1591

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

TABLE C-IX.2 CONCENTRATIONS OF GAMMA EMITTERS IN GRASS SAMPLES COLLECTED INTHE VICINITY OF CLINTON POWER STATION, 2008 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 05/14/08 437 +/- 121 3480 +/- 320 < 13 < 15 < 32 < 12 < 31 < 15 <23 <40 < 12 < 14 < 86 < 29 < 84 05/28/08 586 +/- 131 5670 +/- 354 < 18 < 19 < 43 < 17 < 44 < 20 < 35 < 55 < 20 < 19 < 120 < 29 < 133 06/11/08 939 +/- 148 5790 +/- 398 < 16 < 15 < 41 < 19 < 40 < 18 <27 < 43 < 14 < 15 < 96 < 25 < 90 06/25/08 973 +/- 233 4590 +/- 500 < 19 < 23 < 48 < 21 < 49 < 23 < 39 < 57 < 16 < 23 < 127 < 44 < 139 07/09/08 3070 +/- 204 5250 +/- 336 < 12 < 15 < 33 < 14 < 34 < 15 <22 < 39 < 12 < 12 < 78 < 26 < 85 07/23/08 2540 +/- 108 5050 +/- 196 < 7 <8 <17 <8 <17 <8 <13 <14 <7 <8 <39 < 10 < 46 08/06/08 2020 +/- 94 6640 +/- 194 < 6 <8 < 20 < 7 < 17 <8 < 14 < 34 <6 < 7 < 62 < 17 < 40 08/20/08 902 +/- 73 5990 +/- 161 < 5 <6 <16 <6 <14 <7 <11 <28 <5 <6 <51 < 12 < 36 09/03/08 2380 +/- 243 8400 +/- 498 < 19 < 18 < 44 < 20 < 43 < 19 < 33 <56 < 16 < 18 < 122 < 25 < 119 09/17/08 3380 +/- 186 3860 +/- 235 < 9 < 11 < 25 < 11 < 22 < 11 < 18 < 48 < 9 < 10 < 86 < 24 < 69 10/01/08 2380 +/- 111 4000 +/- 144 < 3 <3 <9 <3 <7 <4 <7 <54 <3 <3 <66 < 17 < 18 10/15/08 944 +/- 120 4090 +/- 240 < 8 < 10 < 26 < 8 < 21 < 10 < 17 < 44 <8 <8 < 74 < 19 < 50 10/29/08 2110 +/- 84 6180 +/- 140 < 2 <3 <8 <2 <5 <3 <5 <60 <2 <2 <58 < 15 < 12 MEAN 1743 +/- 1977 5307 +/- 2717 CL-116 -05/14/08 1770 +/- 253 3990 +/- 402 < 19 < 20 < 41 < 17 < 42 < 20 < 35 < 57 < 18 < 19 < 128 < 35 < 134 05/28/08 1190 +/- 140 4280 +/- 273 < 10 < 13 < 28 < 11 < 26 < 12 <23 < 32 < 11 < 11 < 70 < 23 < 68 06/11/08 2000 +/- 198 5160 +/- 340 < 11 < 13 < 33 < 14 < 27 < 15 <22 < 35 < 11 < 12 < 88 < 18 < 81 06/25/08 1370 +/- 232 4980 +/- 438 < 21 < 23 <46 < 22 < 45 <25 <35 < 50 < 19 <22 < 110 < 37 < 118 07/09/08 1160 +/- 142 2430 +/- 235 < 10 < 11 < 23 < 9 < 24 < 11 <21 < 32 < 10 < 11 < 71 < 19 < 62 07/23/08 3080 +/- 168 4370 +/- 241 < 11 < 11 <25 < 12 < 26 < 12 < 18 < 23 < 10 < 11 < 62 < 15 < 74 08/06/08 2080 +/- 63 4550 +/- 114 < 4 <5 <11 <4 <10 <5 <9 <26 <4 <4 <42 < 10 < 31 08/20/08 1790 +/- 84 5590 +/- 158 < 5 <6 < 14 < 6 < 13 < 6 < 10 < 26 < 5 <5 < 46 < 12 < 33 09/03/08 2510 +/- 190 4800 +/- 328 < 13 < 14 < 32 < 11 < 30 < 15 <22 < 37 < 11 < 13 < 90 < 21 < 76 09/17/08 1730 +/- 107 5030 +/- 190 < 7 <8 < 18 < 8 < 17 < 8 < 12 < 29 < 6 <7 < 58 < 16 < 42 10/01/08 1540 +/- 76 4560 +/- 120 < 3 <4 <11 <3 <8 <4 <7 <56 <3 <3 <61 < 14 < 19 10/15/08 1560 +/- 169 4120 +/- 300 < 9 <9 <20 < 8 < 18 < 10 < 17 < 60 <9 <9 < 98 < 25 < 65 10/29/08 1920,+/- 78 4150 +/- 113 < 2 <2 <7 <2 <4 <2 <4 <59 <2 <2 <53 < 11 < 11 MEAN 1823 +/- 1059 4462 +/- 1537

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

TABLE C-X.1 QUARTERLY TLD RESULTS FOR CLINTON POWER STATION, 2008 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-U1 2u.u +/- 3.5 21.3 +/- 1.1 18.1 +/- 1.1 21.6 +/- 1.3 18.8 +/- 3.8 CL-02 20.4 +/- 4.2 22.5 +/- 0.8 18.2 +/- 1.4 21.9 +/- 0.6 19.0 +/- 1.4 CL-03 19.7 +/- 3.9 21.3 +/- 1.5 17.9 +/- 1.7 21.4 +/- 2.1 18.1 +/- 1.8 CL-04 19.8 +/- 3.4 20.8 +/- 2.1 17.6 +/- 0.9 21.4 +/- 2.6 19.3 +/- 1.6 CL-05 21.0 + 5.0 22.7 +/- 1.3 18.5 +/- 1.3 23.5 +/- 1.8 19.2 +/- 1.3 CL-06 18.4 + 2.9 19.9 +/- 1.2 16.8 +/- 0.5 19.2 +/- 0.9 17.5 +/- 1.8 CL-07 19.2 + 3.5 20.0 +/- 2.5 17.2 +/- 1.7 21.1 +/- 1.9 18.3 +/- 3.3 CL-08 19.6 + 4.8 21.9 +/- 1.9 16.8 +/- 1.7 21.2 +/- 1.4 18.4 +/- 3.1 CL-11 19.3 + 3.8 20.0 +/- 2.4 17.3 +/- 1.4 21.6 +/- 1.9 18.3 +/- 3.1 CL-15 18.2 + 3.1 19.8 +/- 1.5 17.1 +/- 2.7 19.3 +/- 1.2 16.7 +/- 1.7 CL-22 20.3 + 3.3 21.1 +/- 1.1 18.1 +/- 1.2 21.9 +/- 0.9 19.9 +/- 1.9 CL-23 20.8 +/- 5.2 23.4 +/- 3.3 18.6 +/- 2.3 22.6 +/- 1.0 18.5 + 2.0 CL-24 20.9 + 3.7 21.5 +/- 2.1 19.3 +/- 1.4 23.2 +/- 1.2 19.5 + 1.9 CL-33 20.5 +/- 2.9 21.4 +/- 1.8 18.6 +/- 1.2 21.8 +/- 0.6 20.2 +/- 1.5 CL-34 20.9 + 4.1 22.4 +/- 1.0 19.1 +/- 1.7 22.8 +/- 1.1 19.1 +/- 1.8 CL-35 19.6 + 3.5 20.4 +/- 0.8 17.8 +/- 2.9 21.6 +/- 0.6 18.4 + 2.2 CL-36 19.9 +/- 3.2 20.2 +/- 0.9 18.2 +/- 1.6 21.9 +/- 0.8 19.2 +/- 2.0 CL-37 19.4 + 3.9 20.5 +/- 1.9 17.8 +/- 1.0 21.6 +/- 1.3 17.8 +/- 1.6 CL-41 21.3 + 4.1 23.1 +/- 2.1 19.5 +/- 2.1 23.1 +/- 1.7 19.6 +/- 1.5 CL-42 19.7 +/- 2.9 20.7 +/- 0.6 17.9 +/- 0.9 21.1 +/- 0.9 19.2 +/- 2.2 CL-43 21.3 + 3.8 21.9 +/- 1.1 19.3 +/- 1.1 23.7 +/- 1.7 20.4 +/- 1.6 CL-44 20.4 +/- 3.2 21.9 +/- 1.9 18.7 +/- 0.7 21.6 +/- 1.3 19.4 + 1.3 CL-45 21.0 _ 4.3 21.6 +/- 2.0 19.1 +/- 0.8 23.7 +/- 3.0 19.4 + 1.1 CL-46 18.4 + 4.7 21.5 +/- 3.4 16.9 +/- 1.4 18.9 +/- 1.3 16.3 +/- 1.4 CL-47 21.5 + 4.0 23.4 +/- 2.8 19.6 +/- 1.9 23.0 +/- 1.2 19.9 +/- 0.9 CL-48 20.3 + 3.7 22.3 +/- 1.8 18.4 +/- 2.6 21.4 +/- 0.7 19.2 +/- 3.2 CL-49 21.5 + 3.5 21.7 +/- 1.3 18.9 +/- 1.5 22.6 +/- 2.5 22.6 +/- 6.4(1)

CL-51 21.5 _ 3.9 22.4 +/- 1.3 18.6 +/- 1.1 22.9 +/- 2.4 21.9 +/- 4.0 CL-52 20.6 + 2.7 21.8 +/- 3.3 19.3 +/- 3.2 21.6 +/- 1.0 19.5 +/- 2.1 CL-53 20.2 + 3.2 20.9 +/- 1.1 18.5 +/- 1.8 22.1 +/- 0.8 19.3 +/- 1.6 CL-54 20.4 + 3.9 22.2 +/- 0.8 18.6 +/- 1.5 22.0 +/- 1.6 18.8 +/- 1.4 CL-55 20.8 +/- 4.3 22.5 +/- 2.3 18.1 +/- 0.7 22.5 +/- 2.1 20.1 + 2.4 CL-56 20.3 + 10 23.1 +/- 2.8 12.8 +/- 0.8(1) 23.7 +/- 2.3 21.4 +/- 2.0 CL-57 20.1 + 3.4 21.5 +/- 1.3 18.6 +/- 1.9 21.6 +/- 5.7 18.6 +/- 1.8 CL-58 21.6 + 5.7 22.2 +/- 2.1 19.5 +/- 1.8 25.3 +/- 4.8 (1) 19.2 +/- 2.3 CL-60 20.9 +/- 4.5 23.8 +/- 1.7 18.5 +/- 1.2 21.3 +/- 0.7 19.9 +/- 2.8 CL-61 20.0 +/- 3.7 21.6 +/- 2.1 17.6 +/- 3.5 21.3 +/- 1.2 19.3 + 1.4 CL-63 18.2 + 3.2 20.4 +/- 1.8 17.3 +/- 1.1 18.3 +/- 2.8 16.7 + 2.8 CL-64 19.4 + 4.2 21.3 +/- 2.1 18.3 +/- 1.1 21.0 +/- 1.9 17.0 + 1.4 CL-65 21.0 + 3.7 23.0 +/- 2.1 18.6 +/- 2.1 21.5 +/- 1.7 20.7 +/- 6.2 CL-74 18.4 + 3.0 20.1 +/- 1.3 16.4 +/- 0.7 18.6 +/- 1.6 18.6 +/- 1.8 CL-75 19.7 + 3.5 21.2 +/- 2.2 17.8 +/- 0.8 21.1 +/- 1.8 18.6 +/- 1.7 CL-76 19.8 + 4.0 22.6 +/- 1.8 18.1 +/- 1.7 20.0 +/- 1.5 18.6 +/- 0.7 CL-77 19.0 + 3.7 20.7 +/- 1.5 17.5 +/- 0.8 20.5 +/- 1.4 17.3 +/- 2.3 CL-78 20.4 +/- 2.6 21.6 +/- 0.8 18.7 +/- 1.3 21.1 +/- 2.8 20.0 +/- 1.9 CL-79 19.8 +/- 5.0 22.8 +/- 3.3 17.9 +/- 1.9 20.8 +/- 3.5 17.5 +/- 0.7 CL-80 19.7 + 3.9 22.0 +/- 1.7 17.9 +/- 1.5 20.6 +/- 2.4 18.2 +/- 1.8 CL-81 19.5 + 5.1 22.8 +/- 2.4 17.5 +/- 0.8 20.1 +/- 1.3 17.5 +/- 0.8 CL-84 20.0 + 3.5 22.2 +/- 4.1 18.1 +/- 1.5 20.4 +/- 2.1 19.2 +/- 1.8 CL-90 17.3 + 3.9 20.0 +/- 2.1 15.8 +/- 1.6 17.6 +/- 1.3 15.9 +/- 2.4 CL-91 18.8 + 3.2 20.8 +/- 1.6 17.6 +/- 1.5 19.5 +/- 2.1 17.4 +/- 1.7 CL-97 20.3 +/- 3.7 20.9 +/- 0.8 18.4 +/- 1.0 22.5 +/- 1.9 19.2 +/- 2.9 CL-99 17.2 + 2.3 18.5 +/- 0.8 15.7 +/- 0.6 17.2 +/- 2.0 17.5 +/- 1.3 CL-114 18.8 +/- 3.0 20.3 +/- 1.7 17.3 +/- 0.8 19.9 +/- 3.9 17.8 +/- 3.6 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-25

TABLE C-X.1 QUARTERLY TLD RESULTS FOR CLINTON POWER STATION, 2008 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

19.6 +/- 3.4 21.4 +/- 0.9 18.4 +/- 1.2 20.7 +/- 0.7 17.9 +/- 1.3 CL-46MM

20.0 +/- 3.1 22.1 +/- 2.4 18.8 +/- 1.6 20.1 +/- 1.1 18.8 +/- 1.7 CL-47MM

19.8 +/- 4.0 22.0 +/- 1.5 18.1 +/- 1.3 21.0 +/- 1.4 18.2 +/- 1.6 CL-58MM

19.2 +/- 2.6 20.8 +/- 1.7 18.1 +/- 0.8 19.6 +/- 0.9 18.1 +/- 0.8

SEE PAGE 14, SECTION IV.C 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 21.0 +/- 5.0 22.7 +/- 1.3 18.5 +/- 1.3 23.5 +/- 1.8 19.2 +/- 1.3 CL-05MM 19.6 +/- 3.4 21.4 +/- 0.9 18.4 +/- 1.2 20.7 +/- 0.7 17.9 +/- 1.3 CL-46 18.4 +/- 4.7 21.5 +/- 3.4 16.9 +/- 1.4 18.9 +/- 1.3 16.3 +/- 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 21.5 +/- 4.0 23.4 +/- 2.8 19.6 +/- 1.9 23.0 +/- 1.2 19.9 +/- 0.9 CL-47MM 19.8 +/- 4.0 22.0 +/- 1.5 18.1 +/- 1.3 21.0 +/- 1.4 18.2 +/- 1.6 CL-58 21.6 +/- 5.7 22.2 +/- 2.1 19.5 +/- 1.8 25.3 +/- 4.8(1) 19.2 +/- 2.3 CL-58MM 19.2 +/- 2.6 20.8 +/- 1.7 18.1 +/- 0.8 19.6 +/- 0.9 18.1 +/- 0.8 C-26

TABLE C-X.2 MEAN QUARTLY TLD RESULTS FOR THE INNER RING, OUTER RING, SPECIAL INTEREST, SUPPLEMENTAL AND CONTROL LOCATIONS FOR CLINTON POWER STATION, 2008 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION INNER RING OUTER RING SPECIAL INTEREST SUPPLEMENTAL CONTROL PERIOD +/-2 S.D.

JAN-MAR 21.7 +/- 2.0 22.2 +/- 1.6 21.6 +/- 2.3 20.7 +/- 2.2 20.0 +/- 0.0 APR-JUN 18.4 +/- 1.5 18.0 +/- 3.0 18.2 +/- 2.0 17.4 +/- 1.8 17.3 +/- 0.0 JUL-SEP 21.9 +/- 3.1 21.7 +/- 2.8 21.4 +/- 2.9 20.3 +/- 3.2 21.6 +/- 0.0 OCT-DEC 18.9 +/- 2.2 19.2 +/- 2.6 19.3 +/- 3.8 18.2 +/- 2.3 18.3 +/- 0.0 TABLE C-X.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR CLINTON POWER STATION, 2008 RESULTS IN UNITS'OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN PRE-OP MEAN, ANALYZED MINIMUM MAXIMUM +/- 2 S.D. +/-2 S.D., ALL LOCATIONS INNER RING 64 16.3 23.7 20.2 +/- 3.9 OUTER RING 64 17.3 25.3 20.3 +/- 4.3 18 +/- 2.4 SPECIAL INTEREST 28 16.4 23.1 20.1 +/- 3.9 SUPPLEMENTAL 56 15.7 22.5 19.1 +/- 3.7 CONTROL 4 17.3 21.6 19.3 +/- 3.8 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-11

THE RESULTS FOR TLDs CL-05MM, CL-46mm, CL-47MM, CL-58MM ARE NOT PART OF THE REMP AVERAGES. THEY ARE USED FOR COMPARISON PURPOSES ONLY.

C-27

FIGURE C-1 MEAN MONTHLY GROSS BETA CONCENTRATION IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF CPS, 2008 0.052 0.047 0.042 0.037 "3 0.032 0.027

> 0.027 0,022 I-0* 017 0.012 0.002 MONTH PRE-OP (ALL SITES)

--- 2008 CONTROL

-- d-2008 INDICATOR No July 16 - July 23, 2008 data point for CL-11. See program exceptions section for explanation

FIGURE C2 MEAN QUARTERLY AMBIENT GAMMA RADIATION LEVELS (TLD) IN THE VICINITY OF CPS, 2008 50 45 40 35 E

E) 30 E

25 20 15 10 1st 2nd 3rd 4th QUARTER EPRE-OP 02008 indicator N 2008 control

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

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

March 2008 E5847-396 Milk Sr-89 pCi/L 83.5 95.8 0.87 Sr-90 pCi/L 13.9 12.9 1.08 E5848-396 Milk 1-131 pCi/L 57.3 60.0 0.96 Ce-141 pCi/L 229 249 0.92 Cr-51 pCi/L 336 359 0.94 Cs-1 34 pCi/L 106 125 0.85 Cs-1 37 pCi/L 141 146 0.97 Co-58 pCi/L 71.8 70.8 1.01 Mn-54 pCi/L 98.1 94.2 1.04 Fe-59 pCi/L 102 102 1.00 Zn-65 pCi/L 135 137 0.99 Co-60 pCi/L 230 236 0.97 E5850A-396 AP Ce-141 pCi 163 157 1.04 Cr-51 pCi 233 227 1.03 Cs-134 pCi 72.6 79.0 0.92 Cs-137 pCi 98.3 92.0 1.07 Co-58 pCi 46.7 44.7 1.04 Mn-54 pCi 69.8 59.4 1.18 Fe-59 pCi 72.2 64.5 1.12 Zn-65 pCi 106 86.4 1.23 Co-60 pCi 156 149 1.05 E5849-396 Charcoal 1-131 pCi 65.5 60.1 1.09 A June 2008 E5971-396 Milk Sr-89 pCi/L 83.9 85.0 0.99 Sr-90 pCi/L 14.4 15.8 0.91 E5972-396 Milk 1-131 pCi/L 70.9 71.4 0.99 Ce-141 pCi/L 157 174 0.90 Cr-51 pCi/L 159 138 1.15 Cs-134 pCi/L 69.7 76.7 0.91 Cs-137 pCi/L 115 116 0.99 Co-58 pCi/L 59.1 61.9 0.95 Mn-54 pCi/L 139 135 1.03 Fe-59 pCi/L 98.4 91.7 1.07 Zn-65 pCi/L 129 127 1.02 Co-60 pCi/L 101 104 0.97 E5974-396 AP Ce-141 pCi 206 207 1.00 Cr-5S pCi 173 164 1.05 Cs-134 pCi 95.9 91.0 1.05 Cs-137 pCi 142.0 138.0 1.03 Co-58 pCi 72.0 73.4 . 0.98 Mn-54 pCi 180 160.0 1.13 Fe-59 pCi 108.0 109.0 0.99 Zn-65 pCi 159 150 1.06 Co-60 pCi 129 124 1.04 D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

June 2008 E5973-396 Charcoal 1-131 pCi 73.8 84.1 0.88 September 2008 E6284-396 Milk Sr-89 pCi/L 76.2 73.9 1.03 Sr-90 pCi/L 12.3 11.0 1.12 E6285-396 Milk 1-131 pCi/L 65.7 67.9 0.97 Ce-141 pCi/L 145 161 0.90 Cr-51 pCi/L 406 421 0.96 Cs-134 pCi/L 196 232 0.84 Cs-137 pCi/L 147 162 0.91 Co-58 pCi/L 167 179 0.93 Mn-54 pCi/L 165 166 0.99 Fe-59 pCi/L 161 144 1.12 Zn-65 pCi/L 305 319 0.96 Co-60 pCi/L 218 234 0.93 E6287-396 AP Ce-141 pCi 79.5 76.3 1.04 Cr-51 pCi 208 199 1.05 Cs-1i34 pCi 106 110 0.96 Cs-137 pCi 79.3 76.7 1.03 Co-58 pCi 87.7 84.4 1.04 Mn-54 pCi 90.3 78.6 1.15 Fe-59 pCi 81.7 68.3 1.20 Zn-65 pCi 144 151 0.95 Co-60 pCi 111 111 1.00 E6286-396 Charcoal 1-131 pCi 93.2 90.0 1.04 A December 2008 E6415-396 Milk Sr-89 pCi/L 98.4 91.9 1.07 A Sr-90 pCi/L 18.0 12.6 1.43 N (i)

E6416-396 Milk 1-131 pCi/L 69.2 79.9 0.87 A Ce-141 pCi/L 177 191 0.93 A Cr-51 pCi/L 231 246 0.94 A Cs-1 34 pCi/L 117 134 0.87 A Cs-i 37 pCi/L 119 120 0.99 A Co-58 pCi/L 104 104 1.00 A Mn-54 pCi/L 153 152 1.01 A Fe-59 pCi/L 99.6 100 1.00 A Zn-65 pCi/L 177 183 0.97 A Co-60 pCi/L 133 133 1.00 A E6418-396 AP Ce-141 pCi 148 146 1.01 A Cr-51 pCi 202 187 1.08 A Cs-134 pCi 103 102 1.01 A Cs-137 pCi 95.4 91.2 1.05 A Co-58 pCi 81.4 79.2 1.03 A Mn-54 pCi 113 116.0 0.97 A Fe-59 pCi 76.5 76.4 1.00 A Zn-65 pCi 122 139 0.88 A Co-60 pCi 108 101 1.07 A D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

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

December 2008 E6417-396 Charcoal 1-131 pCi 65.8 74.1 0.89 A (1) NCR 09-02 initiated to investigate the failure.

(a) Teledyne Brown Engineeringreported result.

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

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

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

W-Acceptable with warning. Reported resultfalls 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, 2008 (PAGE 1 OF 1)

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

January 2008 Quiktm Response Water Sr-89 pCi/L 37.33 19.0 11.8-25.2 N (1)

Sr-90 pCi/L 40.40 42.7 31.5-49.0 A Ba-133 pCi/L 87.8 90.5 76.2 - 99.6 A Cs-134 pCi/L 80.67 88.9 72.9 - 97.8 A Cs-137 pCi/L 222.33 231 208-256 A Co-60 pCi/L 98.9 101.0 90.9-113 A Zn-65 pCi/L 352 350 315-408 A Gr-A pCi/L 13.0 12.7 6.02- 18.7 A Gr-B pCi/L 32.7 36.2 23.8 - 43.8 A H-3 pCi/L 11100 11300 9840-12400 A January 2008 RAD 72 Water Sr-89 pCi/L 69.0 65.3 53.0 - 73A4 A Sr-90 pCi/L 35.6 41.4 30.5 - 47.6 A Ba-1 33 pCi/L 25.9 25.7 20.0 - 29.5 A Cs-1 34 pCi/L 86.5 92.6 76.0-102 A Cs-1 37 pCi/L 155 158 142- 176 A Co-60 pCi/L 16.0 14.4 11.4-18.7 A Zn-65 pCi/L 214 204 184 - 240 A Gr-A pCi/L 13.3 14.8 7.15 -21.2 A Gr-B pCi/L 21.2 22.5 13.7 - 30.6 A 1-131 pCi/L 22.8 23.6 19.6 - 28.0 A H-3 pCi/L 3390 3540 3000-3910 A April 2008 Rad 73 Water Sr-89 pCi/L 65.47 60.4 48.6 - 68.2 A Sr-90 pCi/L 39.80 39.2 28.8-45.1 A Ba-133 pCi/L 59.63 58.3 48.3 - 64.3 A Cs-1 34 pCi/L 45.00 46.6 37.4 - 51.3 A Cs-1 37 pCi/L 97.97 102 91.8- 115 A Co-60 pCi/L 75.47 76.6 68.9 - 86.7 A Zn-65 pCi/L 109 106 95.4- 126 A Gr-A pCi/L - 41.03 50.8 26.5 - 63.7 A Gr-B pCi/L 50.20 51.4 35.0 - 58.4 A 1-131 pCi/L 26.67 28.7 23.9 - 33.6 A H-3 pCi/L 11633 12000 10400 - 13200 A (1) Could find no cause for Sr-89 failure. Sample sent to outside lab for verification,but the outside laboratorywas unable to confirm our numbers or ERA numbers. Studies bracketing these results, RAD 71 and RAD 72, had acceptable Sr-89 results. NCR 08-03 (a) Teledyne Brown Engineering reportedresult.

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

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

D-4

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

TELEDYNE BROWN ENGINEERING, 2008 (PAGE 1 OF 2) -

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

January 2008 07-MaW18 Water Cs- 134 Bq/L -0.26 (1) A Cs-137 Bq/L 0.029 (1) A Co-57 Bq/L 21 22.8 16.0 -29.6 A Co-60 Bq/L 8.2 8.40 5.88-10.92 A H-3 Bq/L 473 472 330-614 A Mn-54 Bq/L 12 12.1 8.5- 15.7 A Sr-90 BqIL 10.70 11.4 7.98- 14.82 A Zn-65 Bq/L 15.6 16.3 11.4-21.2 A 07-GrW18 Water Gr-A Bq/L 1.4 1.399 >0.0 - 2.798 A Gr-B Bq/L 3.06 2.43 1.22-3.65 A 07-MaS18 Soil Cs-1 34 Bq/kg 790 854.0 598-1110 A Cs-1 37 Bq/kg 568 545 382-709 A Co-57 Bq/kg 424 421 295 - 547 A Co-60 Bq/kg 2.307 2.9 (2) A Mn-54 Bq/kg 611 570 399-741 A K-40 Bq/kg 6.09 571 400 - 742 A Sr-90 Bq/kg 454 493.0 345-641 A Zn-65 Bq/kg 0.162 (1) A 07-RdF18 AP Cs-134 Bq/sample 2.73 2.5200 1.76 - 3.28 A Cs-137 Bq/sample 2.88 2.7 1.89-3.51 A Co-57 Bq/sample 3.493 3.55 2.49 -4.62 A Co-60 Bq/sample 1.357 1.31 0.92-1.70 A Mn-54 Bq/sample 0.006 (1) A Sr-90 Bq/sample 1.61 1.548 1.084 - 2.012 A Zn-65 Bq/sample 2.59 2.04 1.43 - 2.65 A 07-GrF18 AP Gr-A Bq/sample 0.131 0.348 >0.0 - 0.696 A Gr-B Bq~sample 0.261 0.286 0.143 - 0.429 A January 2008 07-RdV18 Vegetation Cs-134 Bq/sample 5.25 6.28 4.40-8.16 A Cs-137 Bq/sample 3.13 3.41 2.39 - 4.43 A Co-57 Bq/sample 6.837 6.89 4.82 - 8.96 A Co-60 Bq/sample 2.44 2.77 1.94-3.60 A Mn-54 Bq/sample 4.45 4.74 3.32-6.16 A K-40 Bq/sample 61.3 (1)

Sr-90 Bq/sample 1.33 1.273 0.891 - 1.655 A Zn-65 Bq/sample 0.085 (1) A August 2008 08-MaW19 Water Cs-1 34 Bq/L 17.1 19.5 13.7-25.4 A Cs-137 Bq/L 21.4 23.6 16.5-30.7 A Co-57 Bq/L -0.044 (1) A Co-60 BqiL 10.8 11.6 8.1 - 15.1 A H-3 Bq/L 334 341 239 - 443 A Mn-54 Bq/L 13.0 13.7 9.6- 17.8 A Sr-90 Bq/L 6.55 6.45 4.52- 8.39 A Zn-65 Bq/L 16.5 17.1 12.0 - 22.2 A D-5

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

TELEDYNE BROWN ENGINEERING, 2008 (PAGE 2 OF 2)

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

August 2008 08-GrW19 Water Gr-A Bq/L 0.0612 <0.56 (3) A Gr-B Bq/L 0.222 <1.85 (3) A 08-MaS19 Soil Cs-134 Bq/kg 546 581 407-755 A Cs-137 Bq/kg 2.52 2.8 (2) A Co-57 Bq/kg 340 333 233-433 A Co-60 Bq/kg 157 145.0 102-189 A Mn-54 Bq/kg 460 415 291 -540 A K-40 Bq/kg 650 571 399-741 A Sr-90 Bq/kg 1.40 (1) A Zn-65 Bq/kg -1.53 (1) A 08-RdF19 AP Cs-1 34 Bq/sample 2.46 2.6300 1.84 - 3.42 A Cs-1 37 Bq/sample 0.0063 (1) A Co-57 Bq/sample 1.36 1.50 1.05-1.95 A Co-60 Bq/sample 0.0143 (1) A Mn-54 Bq/sample 2.70 2.64 1.85 - 3.43 A Sr-90 Bq/sample 1.42 1.12 0.78-1.46 W Zn-65 Bq/sample 0.975 0.94 0.66- 1.22 A 08-GrF19 AP Gr-A Bq/sample -0.0037 (4) A Gr-B Bq/sample 0.540 0.525 0.263 - 0.788 A 08-RdV1 9 Vegetation Cs-134 Bq/sample 4.36 5.5 3.9-7.2 W Cs-137 Bq/sample -0.03 (1) A Co-57 Bq/sample 6.72 7.1 5.0-9.2 A Co-60 Bq/sample 4.04 4.70 3.3-6.1 A Mn-54 Bq/sample 5.22 5.8 4.1 -7.5 A K-40 Bq/sample 64.4 (1)

Sr-90 Bq/sample 1.62 1.9 1.3-2.5 A Zn-65 Bq/sample 6.160 6.9 4.8 - 9.0 A (1) Not evaluated by MAPEP.

(2) Reported a statistically zero result.

(3) Designed to test the Safe Drinking Waterscreening levels. Labs reportingvalues less than ref values were found to be acceptable.

(4) False positive test.

(a) Teledyne Brown Engineering reportedresult.

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

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

D-6

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

Intentionally left blank Docket No: 50-461 '

CLINTON POWER STATION Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2008 Prepared By Teledyne Brown Engineering Environmental Services SExelIn .

Nuclear Clinton Power Station Clinton, IL 61727 April 2009

Table Of Contents I. Summary and Conclusions ................................................................................................ 1 I1. Introduction ............................................................ 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 ...................... M ............................................................................ 5 A. Sample Analysis ................................................................................................ 5 B. Data Interpretation ........................................................................................... 6 C. Background Analysis ......................................................................................... 7

1. Background Concentrations of Tritium ....................... 7 IV. Results and Discussion ............................................................................................. 9 A. Groundwater Results ......................................................................................... 9

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

Tables Table A-i: Radiological Groundwater Protection Program - Sampling Locations, Clinton Power Station, 2008 Figures Security-Related Information: Maps of the Clinton Power Station have been withheld from public disclosure under 10CFR2.390 and N.J.S.A.

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

Tables Table B-1.1 Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table B-1.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table B-11.1 Concentrations of Tritium and Strontium in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

Table B-11.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Clinton Power Station, 2008.

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 2008. During that time period, 99 analyses were performed on 51 samples from 24 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-1 302 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 detected at concentrations greater than the Lower Limit of Detection (LLD) as specified in NUREG-1302 in any of the groundwater or surface water samples.

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 one of 18 groundwater monitoring locations. The tritium concentrations ranged from 740 +

154 pCi/L to 901 +/- 173 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 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 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 2008.

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:

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/power-qen/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 ýto 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 1 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 2008.

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 18 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 901 pCi/I.

Strontium Samples from 18 locations were analyzed for strontium-90 (Table B-1.1 Appendix B). Strontium-90 was not detected at concentrations greater than the LLD.

Gamma Emitters Naturally occurring Beryllium-7 was not detected in 2008.

Additionally, naturally occurring Potassium-40 was detected in one of 18 samples. The concentration was 69 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 Samples from six locations were analyzed for strontium-90 (Table B-11.1 Appendix B). Strontium-90 was not detected at concentrations greater than the LLD.

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-i: Radiological Groundwater Protection Program - Sampling Locations, Clinton Power Station, 2008 Site Site Type B-3 Monitoring Well Lagoon Spigot Ground Water MW-CL-1 Monitoring Well MW-CL-121 Monitoring Well MW-CL-131 Monitoring Well MW-CL-13S Monitoring Well MW-CL-14S Monitoring Well MW-CL-151 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-2 Monitoring Well MW-CL-20S Monitoring Well MW-CL-21S Monitoring Well MW-CL-22S Monitoring Well SW-CL-1 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, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 B-3 04/14/08 < 177 B-3 10/22/08 < 138 < 1.0 MW-CL-1 04/23/08 < 191 MW-CL-1 10/22/08 < 146

1.6 MW-CL-121 04/15/08 < 184 MW-CL-121 10/22/08 < 138 < 1.0 MW-CL-131 04/23/08 < 196 MW-CL-131 10/23/08 < 144 < 1.4 MW-CL-1 3S 04/23/08 < 194 MW-CL-1 3S 10/23/08 179 +/- 101 < 1.2 MW-CL-14S 04/23/08 < 178 MW-CL-14S 10/22/08 192 +/- 100 < 1.2 MW-CL-151 04/15/08 < 181 MW-CL-151 10/23/08 < 143 < 1.1 MW-CL-15S 04/14/08 < 172 MW-CL-15S 10/23/08 < 143 < 1.0 MW-CL-16S 04/23/08 < 193 MW-CL-16S 10/22/08

145 < 1.1 MW-CL-17S 04/23/08

195 MW-CL-17S 10/22/08 < 148 < 1.0 MW-CL-181 04/23/08 < 195 MW-CL-181 10/22/08 < 148 < 1.0 MW-CL-18S 04/23/08 < 193 MW-CL-18S 10/22/08 < 141 < 1.2 MW-CL- 19S 04/15/08 < 167 MW-CL-19S 10/22/08 < 139 < 0.9 MW-CL-2 04/15/08 < 183 MW-CL-2 10/22/08 < 147 < 1.4 MW-CL-20S 04/14/08 < 169 MW-CL-20S 10/22/08 < 137 < 1.2 MW-CL-21 S 02/25/08 819 +/- 154 MW-CL-21 S 04/14/08 740 +/- 154 MW-CL-21 S 07/09/08 901 +/- 173 MW-CL-21S 10/23/08 744 +/- 147 < 1.1 MW-CL-22S 04/23/08 < 194 MW-CL-22S 10/22/08 < 146 < 0.9 LAGOON SPIGOT 04/23/08 < 191 LAGOON SPIGOT 05/16/08 < 198 LAGOON SPIGOT 10/22/08 < 143 < 0.8 B-1

m m - =-- m m m m m m -

m = = = m TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 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-1 34 Cs-137 Ba-140 La-140 PERIOD B-3 10/22/08 23 < 53 <2 <2 <6 <2 <4 <2 <4 <2 <2 < 54 <11 MW-CL-1 10/22/08 19 69 +/-33 <2. <2 <5 <2 <3 < 2- <3 <1 <2 < 48 < 15 MW-CL-121 10/22/08 17 < 42 <1 <2 < 6 <1 <3 <2 <3 <1 <1 < 44 < 15 MW-CL-131 10/23/08 22 < 40 <2 <2 <6 <1 <3 <3 <4 <2 <1

55 <12 MW-CL-13S 10/23/08 19 < 43 <1 <2 <5 <1 <3 <2 <4 <1 <1 < 40 < 13 MW-CL-14S 10/22/08 18 < 13 <1 <2 <5 <2 <3 <2 <3 <i <1 < 38 < 11 MW-CL-151 10/23/08 16 < 11 <1 <1 <4 <1 <3 <2 <3 <1 <1 < 42 < 13 MW-CL-15S 10/23/08 19 < 32 <1 <2 <5 <2 <3 <2 <3 <1 <1 < 46 < 14 MW-CL-16S 10/22/08 18 < 42 <1 <2 <5 <3 <2 <4 -<1 <1 < 49 < 12 MW-CL-1 7S 10/22/08 15 < 28 <1 <2 <4 <1 <2 <2 <3 <1 <1 < 32

<1 < 14 MW-CL-1 81 10/22/08 15 < 25 <1 < 1 <3 <2 <1 <2 <1 <1 < 26 <8

<1 MW-CL-1 8S 10/22/08 17 < 11 <1 <2 <4 <3S <2 <3 <1 < 45

<1 <1 < 15 MW-CL-1 9S 10/22/08 16 < 36 <1 <2 <4 <2 <2 <3 <1 < 39

<1 < 11 MW-CL-2 10/22/08 17 < 11 <1 <2 <4 <3 <2 <3 <1 <1 < 44

<12 < 12 MW-CL-20S 10/22/08 17 < 10 <1 <1 <3 <3 <2 <2 <1 <1 < 35

<2 < 13 MW-CL-21 S 10/23/08 17 < 33 <1 <2 <4 <2 <2 <3 <1 < 44

<1 <1 < 13 MW-CL-22S 10/22/08 16 < 12 <1 <2 <4 <1 <2 <2 <3 <1 < 36 < 14 LAGOON SPIGOT 10/22/08 14 < 30 < 1 < 3 < 1

< 2 < 3 < 35 < 10 (1) WELL RAN DRY. ONLY ENOUGH WATER COLLECTED FOR H-3 ANALYSIS

TABLE B-II.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 SW-CL-1 04/15/08 < 170 SW-CL-1 10/22/08 < 145 < 1.0 SW-CL-2 04/14/08 < 177 SW-CL-2 10/22/08 < 142

1.0 SW-CL-4 04/14/08 < 166 SW-CL-4 10/22/08 < 144 < 1.3 SW-CL-5 04/14/08 < 179 SW-CL-5 10/22/08 < 143 < 0.7 SW-CL-6 04/15/08 < 180 SW-CL-6 10/22/08 < 145 < 1.0 SW-CL-7 04/14/08 < 169 SW-CL-7 10/22/08

135

0.8 B-3

- -- l m m m - m m 'm - m m - m TABLE B-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF CLINTON POWER STATION, 2008 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 SW-CL-1 10/22/08 < 15 < 30 <2 <4 3 < 36 13 SW-CL-2 10/22/08 < 13 < 22 < 1 <3 2 < 30 10 SW-CL-4 10/22/08 < 15 < 34 <2 <4 2 3 < 39 11 SW-CL-5 10/22/08 < 19 < 12 <2 <5 2 3 < 44 14 SW-CL-6 10/22/08 < 14 < 31 < 1 <3 2 3 < 40 11 SW-CL-7 10/22/08 < 18 < 33 <2 <4 2 3 < 46 13 w.

U-603893, Annual Radiological Environmental Operating Report for January 1 Through December 31, 2008

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