ML091280061

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Annual Radiological Environmental Operating Report, Report No. 24, 1 January Through 31 December 2008
ML091280061
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 04/30/2009
From:
Exelon Nuclear, Teledyne Brown Engineering Environmental Services
To:
Office of Nuclear Reactor Regulation
References
Download: ML091280061 (114)
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Docket No: 50 - 352 50-353 LIMERICK GENERATING STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report Report No. 24 1 January Through 31 December 2008 Prepared By Teledyne Brown Engineering Environmental Services Exel I Nuclear Limerick Generating Station Sanatoga, PA 19464 April 2009

Table Of Contents

1. Summary and Conclusions ..................................................................... I 11.Introduction ..................................................................................... 3 A. Objectives of the REMP............................................................... 3 B. Implementation of the Objectives..................................................... 3 111. Program Description........................................................................... 4 A. Sample Collection...................................................................... 4 B. Sample Analysis ....................................................................... 6 C. Data Interpretation..................................................................... 6 D. Program Exceptions................................................................... 7 E. Program Changes...................................................................... 8 IV. Results and Discussion ......................................................... 8 A. Aquatic Environment ..................................................... *"**..........8
1. Surface Water .................................................................. 8
2. Drinking Water ............ ..................................................... 9
3. Fish .............................................................................. 9
4. Sediment............. -"*... .......... ........ .........
    • 10 B. Atmospheric Environment ........................................................... 10
1. Airborne ....................................................................... 10
a. Air Particulates........................................................ 10
b. Airborne Iodine........................................................ 11
2. Terrestrial...................................................................... 11
a. Milk .................................................................... 11
b. Broad Leaf Vegetation................................................ 12 C. Ambient Gamma Radiation.......................................................... 12 D. 10 CFR 20.2002 Permit Storage Area.............................................. 13 E. Land Use Survey..................................................................... 13 F. Summary of Results - Inter-Laboratory Comparison Program ................... 13 V. References.................................................................................... 15

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the Limerick Generating Station, 2008.

Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-i: Location Designation and Identification System for the Limerick Generating Station.

Table B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Limerick Generating Station, 2008.

Table B-3: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Limerick Generating Station, 2008.

Figures Figure B-i: Environmental Sampling Locations Within One Mile of the Limerick Generating Station, 2008.

Figure B-2: Environmental Sampling Locations Between One and Five Miles from the Limerick Generating Station, 2008.

Figure B-3: Environmental Sampling Locations Greater Than Five Miles from the Limerick Generating Station, 2008.

Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-1.1 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-1.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Limerick Generating Station, 2008.

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Table C-11.1 Concentrations of Total Gross Beta in Drinking Water Samples Collected in the Vicinity of Limerick Generating Station, 2008.

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

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

Table C-111.1 Concentrations of Gamma Emitters in Predator and Bottom Feeder (Fish) Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Limerick Generating Station, 2008.

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

Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-VI.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-VII.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-VII1.1 Concentrations of Gamma Emitters in Broad Leaf Vegetation Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table C-IX.1 Quarterly TLD Results for Limerick Generating Station, 2008.

Table C-IX.2 Mean Quarterly TLD Results for the Site Boundary, Middle and Control Locations for Limerick Generating Station, 2008.

Table C-IX.3 Summary of the Ambient Dosimetry Program for Limerick Generating Station, 2008.

Fiqures Figure C-1 Mean Monthly Total Gross Beta Concentrations in Drinking Water Samples Collected in the Vicinity of LGS, 1982 - 2008.

Figure C-2 Mean Annual Cs-1 37 Concentrations in Fish Samples Collected in the Vicinity of LGS, 1982 - 2008.

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Figure C-3 Concentrations of Cs-137 in Sediment Samples Collected in the Vicinity of LGS, 1982 - 2008.

Figure C-4 Mean Monthly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of LGS, 1982 - 2008.

Figure C-5 Mean Weekly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of LGS, 2008.

Figure C-6 Mean Quarterly Ambient Gamma Radiation Levels (TLD) in the Vicinity of LGS, 1985 - 2008.

Appendix D Data Tables and Figures - Comparison Laboratory Tables Table D-1.1 Concentrations of Total Gross Beta in Drinking Water Samples Collected in the Vicinity Of Limerick Generating Station, 2008.

Table D-1.2 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity Of Limerick Generating Station, 2008.

Table D-1.3 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table D-11.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table D-11.2 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Limerick Generating Station, 2008.

Table D-Ill.1 Concentrations of 1-131 by Chemical Separation and Gamma Emitters in Milk Samples Collected in the Vicinity of Limerick Generating Station, 2008..

Figures Figure D-1 Comparison of Monthly Total Gross Beta Concentrations in Drinking Water Samples Split Between ENV and TBE, 2008.

Figure D-2 Comparison of Weekly Gross Beta Concentrations in Air Particulate Samples Collected from LGS Collocated Locations 11S1 and 11S2, 2008.

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Appendix E Inter-Laboratory Comparison Program Tables Table E-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008.

Table E-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008.

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

Teledyne Brown Engineering, 2008.

Table E-4 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2008.

Table E-5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2008.

Appendix F Annual Radiological Groundwater Protection Program Report (ARGPPR) v

Intentionally Left Blank vi

1. Summary and Conclusions In 2008 the Limerick Generating Station released to the environment through the radioactive effluent liquid and gaseous pathways approximately 73 curies of noble gas, fission and activation products and approximately 63 curies of tritium.

The dose from both liquid and gaseous effluents was conservatively calculated for the Maximum Exposed Member of the Public. The results of those calculations and their comparison to the allowable limits were as follows:

Gaseous and liquid radiation doses to members of the public at locations Effluent Applicable Estimated Age Location  % of Limit Unit Organ Dose Group Distance Direction Applicable

. _ (meters) (toward) Limit Noble Gas Gamma - Air Dose 8.55E-03 All 762 SE 4.28E-02 20 mRad Noble Gas Beta - Air Dose 5.22E-03 All 762 SE 1.31E-02 40 mRad Noble Gas Total Body (Gamma) 5.32E-03 All 762 SE 5.32E-02 10 mrem Noble Gas Skin (Beta) 9.93E-03 All 762 SE 3.31 E-02 30 mrem Iodine, Particulate &

Tritium Thyroid 5.87E-03 Infant 762 SE 1.96E-02 30 mrem Liquid -Total Body 7.11 E-03 Adult LGS Outfall 1.19E-01 6 mrem Liquid Liver 1.02E-03 Teen. LGS Outfall 5.1OE-02 20 mrem The doses as a result of the radiological effluents released from Limerick were a very small percentage of the allowable limits.

This report on the Radiological Environmental Monitoring Program conducted for the Limerick Generating Station (LGS) by Exelon covers the period 1 January 2008 through 31 December 2008. During that time period, 1141 analyses were performed on 929 samples.

Surface and drinking water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Drinking water samples were also analyzed for concentrations of total gross beta. No fission or activation products were detected. Gross beta activities detected were consistent with those detected in previous years.

Fish (predator and bottom feeder) and sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected.

Sediment samples collected below the discharge had .elevated Cesium-137 concentrations that were the result of LGS discharges. No other Plant produced fission or activation products were found in sediment. The calculated dose to a teenager's skin and whole body was 4.62E-04 mrem and 3.96E-04 mrem, respectively. This dose represents 2.31 E-03% and 6.60E-03%, respectively of the 10 CFR Part 50, Appendix I dose limits.

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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 results were less than the minimum detectable concentration.

Cow milk samples were analyzed for concentrations of 1-131 and gamma emitting nuclides. All 1-131 results were below the minimum detectable concentration. Concentrations of naturally occurring K-40 were consistent with those detected in previous years. No fission or activation products were found.

Broad Leaf Vegetation samples were analyzed for gamma emitting nuclides.

Concentrations of naturally occurring Be-7 and K-40 were detected. No activation or fission products were detected.

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

Review of the gamma spectroscopy results from the surface water samples located at the Limerick intake (24S1) and downstream of the 10CFR20.2002 permitted storage area showed no evidence of offsite radionuclide transport from the 2002 permitted storage area.

A radiological groundwater protection program (RGPP) was established in 2006 as part of an Exelon Nuclear fleetwide assessment of potential groundwater intrusion from the operation of the Station. Well water samples were analyzed for tritium, Sr-90 and gamma emitters. Most tritium values were less than the lower limit of detection of 200 pCi/L. However, one well located near the radwaste /cooling tower blowdown line had a tritium value as high as 902 pCi/L.

This activity was due to a cooling tower overflow while a Radwaste discharge was in progress. The discharge was secured and no radioactivity was found in the water sample obtained. Although no drinking water pathway exist, the dose via the drinking water pathway was calculated at 0.053 mrem to a child (total body), which was 0.89% of the 10 CFR 50, Appendix I dose limit. All results for Sr-90 and gamma emitting nuclides were less than MDC.

In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of LGS had no adverse radiological impact on the environment.

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II. Introduction The Limerick Generating Station (LGS), consisting of two 3,458 MWt boiling water reactors owned and operated by Exelon Corporation, is located adjacent to the Schuylkill River in Montgomery County, Pennsylvania. Unit No. 1 went critical on 22 December 1984. Unit No. 2 went critical on 11 August 1989. The site is located in Piedmont countryside, transversed by numerous valleys containing small tributaries that feed into the Schuylkill River. On the eastern river bank elevation rises from approximately 110 to 300 feet mean sea level (MSL). On the western river bank elevation rises to approximately 50 feet MSL to the western site boundary.

A Radiological Environmental Monitoring Program (REMP) for LGS was initiated in 1971. Review of the 1971 through 1977 REMP data resulted in the modification of the program to comply with changes in the Environmental Report Operating License Stage (EROL) and the Branch Technical Position Paper (Rev.

1, 1979). The preoperational period for most media covers the periods 1 January 1982 through.21 December 1984 and was summarized in a separate report.

This report covers those analyses performed by Teledyne Brown Engineering (TBE), Global Dosimetry, and Environmental Inc. (Midwest Labs) on samples collected during the period 1 January 2008 through 31 December 2008.

On 6 July 1996 a 10CFR20.2002 permit was issued to Limerick for storage of slightly contaminated soils, sediments and sludges obtained from the holding pond, cooling tower and spray pond systems. These materials will decay to background while in storage. Final disposition will be determined at Station decommissioning.

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

1. Provide data on measurable levels of radiation and radioactive materials in the site environs.
2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure.

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

1. Identifying significant exposure pathways.

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2. Establishing baseline radiological data of media within those pathways.
3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment.

Ill. Program Description A. Sample Collection Samples for the LGS REMP were collected for Exelon Nuclear by Normandeau Associates, Inc. (NAI). This section describes the general collection methods used by NAI to obtain environmental samples for the LGS 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 collection procedures used by NAI are listed in Table B-3.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, drinking water, fish, and sediment.

Two-gallon water samples were collected monthly from continuous samplers located at three surface water locations (10F2, 13B1 and 24S1) and four drinking water locations (15F4, 15F7, 16C2, and 28F3). Control locations were 24S1, and 28F3. 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 two groups, catfish/bullhead (bottom-feeder) and sunfish (predator), were collected semiannually at two locations, 16C5 and 29C1 (control). Sediment samples composed of recently deposited substrate were collected at three locations semiannually, 16B2, 16C4 and 33A2 (control).

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, and milk. Airborne iodine and particulate samples were collected and analyzed weekly at five locations (10S3, 11S1, 13C1, 14S1, and 22G1). The control location was 22G1. 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 five locations (10F4, 18E1, 19B1, 23F1, and 25C1) from April through November, and monthly from December through March. Two additional locations (25E1 and 36E1) were sampled quarterly. Locations 36E1 and 23F1 were controls. All 4

samples were collected in new unused two gallon plastic bottles from the bulk tank at each location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Broad Leaf Vegetation was collected monthly at three locations (11S3, 13S3 and 31G1). The control location was 31G1. Eight different kinds of vegetation samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

Ambient Gamma Radiation Direct radiation measurements were made using Panasonic 814 calcium sulfate (CaSO4 ) thermoluminescent dosimeters (TLD). The TLD locations were placed on and around the LGS site as follows:

A site boundary ring consisting of 16 locations (36S2, 3S1, 5S1, 7S1, 10S3, 11S1, 13S2, 14S1, 18S2, 21S2, 23S2, 25S2, 26S3, 29S1, 31S1 and 34S2) near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses) from LGS releases.

An intermediate distance ring consisting of 16 locations (36D1, 2E1, 4E1, 7E1, 10E1, 10F3, 13E1, 16F1, 19D1, 20F1, 24D1, 25D1, 28D2, 29E1, 31D2, and 34E1) extending to approximately 5 miles from the site designed to measure possible exposures to close-in population.

The balance of eight locations (5H1, 6C1,9C1, 13C1, 15D1, 17B1, 20D1 and 31D1) representing control and special interests areas such as population centers, schools, etc.

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 LGS, 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 vents in the prevailing downwind direction.

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

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10CFR20.2002 Permit Storage Area The results of the surface water sampling program were used to determine. if radioactive nuclide transport from the storage area into the Schuylkill River had occurred.

B. Sample Analysis This section describes the general analytical methodologies used by TBE and Midwest Labs to analyze the environmental samples for radioactivity for the LGS REMP in 2008. The analytical procedures used by the laboratories are listed in Table B-3.

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 and drinking water, air particulates, milk, fish, broad leaf vegetation and sediment.
3. Concentrations of tritium in surface and drinking water.
4. Concentrations of 1-131 in air and milk.
5. Ambient gamma radiation levels at various site environs.

C. Data Interpretation The radiological and direct radiation data collected prior to LGS becoming operational was used as a baseline with which these operational data were compared. For the purpose of this report, LGS 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 LGS detection limits for environmental sample analysis.

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

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

If no positive activity was detected, then gamma spectroscopy MDC results for each type of sample were grouped as follows:

For surface and drinking water twelve nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, 1-131, Cs-1 34, Cs-137, E;1,---I40, and La-140 were reported.

,r fish nine nuclides, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65,

-131, Cs-134, and Cs-137 were reported.

For sediment and broad leaf vegetation eight nuclides, Be-7, K-40, Mn-54, Co-58, Co-60, 1-131, Cs-1 34, and Cs-1 37 were reported.

-r air particulate six nuclides, Be-7, Mn-54, Co-58, Co-60, Cs-1 34, and Cs-1 37 were reported.

For milk five nuclides, K-40, Cs-134, Cs-137, Ba-140, and La-140 were reported.

Means and standard deviations of positive results were calculated.

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

D. Program Exceptions For 2008 the LGS REMP had a sample recovery rate in excess of 99%.

Exceptions are listed below:

1. Air sample from location 14S1 for the week 07/27/08 - 08/02/08 was not available due to equipment malfunction (IR828053).
2. Air sample from location 13C1 for the week 09/28/08 - 10/04/08 was not available due to equipment malfunction (IR851235).
3. Grab samples were taken for the composite drinking water sampler at location 16C2 during the following periods due to equipment 7

malfunction or insufficient sample collected: 04/21/08- 05/03/08 and 08/25/08 - 09/06/08.

4. A grab sample was taken for the composite drinking water sampler at location 28F3 from 07/20/08 - 07/26/08, 08/03/08 - 08/09/08, 10/26/08 - 11/01/08 and 11/16/08 - 11/22/08 due to insufficient sample collection.

.5. A grab sample was taken for the composite drinking water sampler at location 151F4 from 10/05/08 - 10/11/08 due to a change in river flow.

6. A grab sample Was taken for the composite service water sampler at location 13131 from 03/30/08 - 04/05/08, 04/13/08 - 04/19/08, 04/27/08 - 05/03/08, 05/04/08 - 05/10/08, 06/15/08 - 06/21/08, 08/31/08 - 09/06/08 and 09/07/08 - 09/13/08 due to equipment failure and low river water.
7. A grab sample was taken for the composite service water sampler at location 24S1 from 01/27/08 - 02/02/08 due to frozen sample line.
8. Only two broad leaf vegetation samples were collected at Stations 11 S3 and 31 G1 during the month of October. Cabbage was not available.

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

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

E. Program Changes Surface water Station 10F2, which draws its water from the Delaware River was placed back into service on July 14, 2008 when LGS began using the Delaware River as the source for cooling tower makeup water.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken from a continuous sampler at three locations (10F2, 13B1 and 24S1) on a monthly schedule. Of these locations 8

only 13B1 located downstream, could be affected by Limerick's effluent releases. The following analyses were performed.

Tritium Monthly samples from all locations were composited quarterly and analyzed for tritium activity (Table C-1.1, Appendix C). All results were less than the MDC.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-1.2, Appendix C). All nuclides were less than the MDC.

2. Drinking Water Monthly samples were collected from continuous water samplers at four locations (15F4, 15F7, 16C2, and 28F3). Three locations (15F4, 15F7, and 16C2) could be affected by Limerick's effluent releases. The following analyses were performed:

Gross Beta Samples from all locations were analyzed for concentrations of total gross beta (Tables C-11.1, Appendix C). The values ranged from 2.3 to 7.2 pCi/L. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C).

Tritium Monthly samples from all locations were composited quarterly and analyzed for tritium activity (Table C-11.2, Appendix C). All results were less than the MDC.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-11.3, Appendix C). All nuclides were less than the MDC.

3. Fish Fish samples comprised of catfish/bullhead (bottom feeder) and sunfish (predator) were collected at two locations (16C5 and 29C1) in the spring and fall season. Location 16C5 could be affected by Limerick's effluent releases. The following analysis was performed:

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Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma emitting nuclides (Table C-111.1, Appendix C).

Naturally occurring K-40 was found at all stations and ranged from 2,660 to 3,680 pCi/kg wet and was consistent with levels detected in previous years. No other gamma emitting nuclides were found.

Historical levels of Cs-137 are shown in Figure C-2, Appendix C.

4. Sediment Aquatic sediment samples were collected at three locations (16B2, 16C4 and 33A2) semiannually. Of these locations two 166B2 and 16C4 located downstream, could be affected by Limerick's effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from all three locations were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). Nuclides detected were naturally occurring Be-7, K-40 and the fission product Cs-137.

Beryllium-7 was found at locations06B2 and 16C4 and ranged from 1,560 to 5,990 pCi/kg dry. Potassium-40 was found at all locations and ranged from 8,920 to 17,700 pCi/kg dry. The fission product Cs-1 37 was found at downstream locations 16B2 and 16C4 at concentrations of 176 and 162 pCi/kg dry, respectively. The Cs-137 activity found is attributed to LGS radioactive effluent releases.

The dose to a teenager's skin and whole body was conservatively calculated at 4.62E-04 mrem and 3.96E-04 mrem, respectively.

This dose represents 2.31 E-03% and 6.60E-03%, of the Appendix I to 10 CFR Part 50 dose limits, respectively. The activity detected was consistent with those detected in the pre-operational years.

(Figure C-4, Appendix C). No other Limerick fission or activation products were found.

B. Atmospheric Environment

1. Airborne
a. Air Particulates Continuous air particulate samples were collected from five locations on a weekly basis. The five locations were separated into three groups: Group I represents locations within the LGS site boundary (10S3, 11S1, and 14S1),

Group II represents the location at an intermediate distance from the LGS site (13C1), and Group III represents the control location at a remote distance from LGS (22G1). The 10

following analyses were performed:

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

Detectable gross beta activity was observed at all locations.

The results from the On-Site locations (Group I) ranged from 7 to 33 E-3 pCi/m 3 with a mean of 16.1 E-3 pCi/m 3. The results from the Intermediate Distance location (Group II) ranged from 9 to 32 E-3 pCi/m 3 with -a mean of 16.9 E-3 pCi/m 3 . The results from the Distant locations (Group Ill) ranged from 8 to 38 E-3 pCi/m 3 with a mean of 16.5 E-3 pCi/mr3 . Comparison of the 2008 air particulate data with previous years data indicate no effects from the operation of LGS (Figure C-4, Appendix C). In addition a comparison of the weekly mean values for 2008 indicate no notable differences among the three groups (Figure C-5, Appendix C).

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

Naturally occurring Be-7 due to cosmic ray activity was detected in all samples. These values ranged from 49 to 156 E-3 pCi/m 3 . All other nuclides were less than the MDC.

b. Airborne Iodine Continuous air samples were collected from five locations (10S3, 11S1, 14S1, 13C1, and 22G1) and analyzed weekly for 1-131 (Table C-VI.1, Appendix C). All results were less than the MDC.
2. Terrestrial
a. Milk Samples were collected from five locations (10F4, 18E1, 199B1, 23F1, and 25C1) biweekly April through November and monthly December through March. Samples from two additional locations (36E1 and 25E1) were taken quarterly.

The following analyses were performed:

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Iodine-131 Milk samples from all locations were analyzed for concentrations of 1-131 (Table C-VII.1, Appendix C). All results were less than the MDC.

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

Naturally occurring K-40 activity was found in all samples and ranged from 1,050 to 1,460 pCi/L. All other nuclides were less than the MDC.

b. Broad Leaf Vegetation Three types of broad leaf vegetation samples were collected from three locations (11S3, 13S3 and 31G1) monthly from June through September. The following analysis was performed:

Gamma Spectrometry Each broad leaf vegetation sample was analyzed for concentrations of gamma emitting nuclides (Table C-VIII.1, Appendix C).

Cosmogenic Be-7 was found in 30 of 43 samples and ranged from 74 to 2,060 pCi/kg wet. Naturally occurring K-40 was found in all samples and ranged from 1,680 to 7,060 pCi/kg wet. All other nuclides were less than the MDC.

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

Most TLD measurements were below 10 mR/standard month, with a range of 5.5 to 12.6 mR/standard month. A comparison of the Site Boundary and Intermediate Distance data to the Control Location data, indicate that the ambient gamma radiation levels from the Control Location 5H1 were consistently higher. The historical ambient gamma radiation data from Location 5H1 were plotted along with similar data from the Site, Intermediate Distance and Outer Ring Locations (Figure C-6, Appendix C). Location 5H1 has a historical high bias, but tracked with the data from all three groups. This bias is most likely due to radon emanating from the ground.

12

D. 10 CFR 20.2002 Permit.Storage Area The results of the surface water aquatic monitoring program from Location 24S1 were used to determine if radioactivity from the permit storage area had made it to the Schuylkill River. The data obtained from the gamma analysis program did not detect any migration of radioactivity from the permit storage area.

E. Land Use Survey A Land Use Survey conducted in August 2008 around Limerick Generating Station (LGS) was performed by Normandeau Associates, Inc.

for Exelon Nuclear to comply with Bases 3.3.2 of the Limerick's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 500 ft 2 in each of the sixteen 22 /2 degree sectors around the site. Four new gardens are included in the 2008 survey. The gardens in the ENE, E and SW sectors are further away than 2007. The garden in the WSW sector is closer than 2007. The distance and direction of all locations from the LGS reactor buildings were positioned using Global Positioning System (GPS) technology. There were no changes required to the LGS REMP, as a result of this survey. The results of this survey are summarized below.

Distance in miles from the LGS Reactor Buildings Sector Residence Garden Milk Farm Miles Miles Miles 1N 0.6 1.8 4.7 2 NNE 0.5 1.8 3 NE 0.7 1.6 4 ENE 0.7 2.7 5 E 0.6 2.4 6 ESE 0.5 0.3 7 SE 017 0.2 8 SSE 1.0 1.1 9S 1.0 1.2 4.2 10 SSW 0.8 1.0 2.0 11 SW 1.0 1.0 -

12 WSW 0.6 2.3 2.7 13 W 0.7 0.8 2.8 14 WNW 0.7 0.7 -

15 NW 0.7 1.6 16 NNW 0.7 1.3 F. Summary of Results - Inter-laboratory Comparison Program The primary and secondary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices for 28 analytes (Appendix E). The PE samples, supplied by Analytics Inc., Environmental Resource Associates (ERA) and DOE's MAPEP, were evaluated against the following pre-set acceptance criteria:

13

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. NCR 08-03 was initiated to investigate this failure. No cause could be found for the failure.

Studies bracketing these results, RAD 71 and RAD 72 had acceptable Sr-89 results.

14

For the secondary laboratory, Environmental, Inc. all 15 analytes met the specified acceptance criteria.

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

V. References

1. Environmental Report Operating License Stage, Limerick Generating Station, Units 1 and 2, Volumes 1-5 Philadelphia Electric Company.
2. Branch Technical Position Paper, Regulatory Guide 4.8, Revision 1, November 1979.
3. Pre-operational Radiological Environmental Monitoring Program Report, Limerick Generating Station Units 1 and 2, 1 January 1982 through 21 December 1984, Teledyne Isotopes and Radiation Management Corporation.

15

Intentionally Left Blank 16

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility:'LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 H-3 10 200 <LLD <LLD 0 (PCI/LITER)

GAMMA 30 MN-54 15 <LLD <LLD 0 CO-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 CO-60 15 <LLD <LLD 0 ZN-65 30 <LLD <LLD 0 NB-95 15 <LLD <LLD 0 ZR-95 30 <LLD <LLD 0 1-131 15 <LLD <LLD 0 CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 BA-140 60 <LLD <LLD 0 LA-140 15 <LLD <LLD 0

  • 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)

A-1

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility: LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 GR-B 48 4 4.3 3.3 4.5 15F7 INDICATOR 0 (PCI/LITER) (33/36) (12/12) (11/12) PHOENIXVILLE WATER WORKS (2.3/7.2) (2.3/5.1) (2.7/7.2) 6.33 MILES SSE OF SITE H-3 16 200 <LLD <LLD 0 GAMMA 48 MN-54 15 <LLD <LLD 0 CO-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 CO-60 15 <LLD <LLD 0 ZN-65 30 <LLD <LLD 0 NB-95 15 <LLD <LLD 0 ZR-95 30 <LLD <LLD 0 1-131 15 <LLD <LLD 0 CS-1 34 15 <LLD <LLD 0 CS-1 37 18 <LLD <LLD BA-140 60 <LLD <LLD 0 LA-140 15 <LLD <LLD 0

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

A-2

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility: LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 BOTTOM FEEDER GAMMA 4 (PCi/KG WET) K-40 NA 3060 3515 3515 29C1 CONTROL 0 (2/2) (2/2) (2/2) POTTSTOWN VICINITY (2660/3460) (3350/3680) (3350/3680) UPSTREAM OF INTAKE MN-54 130 <LLD <LLD 0 CO-58 130 <LLD <LLD 0 FE-59 260 <LLD <LLD 0 CO-60 130 <LLD <LLD 0 ZN-65 260 <LLD <LLD 0 1-131 NA <LLD <LLD 0 CS-134 100 <LLD <LLD 0 CS-137 100 <LLD <LLD 0 PREDATOR GAMMA 4 (PCI/KG WET) K-40 NA 3295 2770 3295 16C5 INDICATOR 0 (2/2) (2/2) (2/2) VINCENT POOL (3290/3300) (2690/2850) (3290/3300) DOWNSTREAM OF DISCHARGE MN-54 130 <LLD <LLD 0 CO-58 130 <LLD <LLD 0 FE-59 260 <LLD <LLD 0

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

A-3

TABLEA-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility: LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 PREDATOR CO-60 130 <LLD <LLD 0 (PCI/KG WET)

ZN-65 260 <LLD <LLD 0 1-131 NA <LLD <LLD 0 CS-134 100 <LLD <LLD 0 CS-137 100 <LLD <LLD 0 SEDIMENT GAMMA 6 (PCI/KG DRY) BE-7 NA 4437 <LLD 5875 16C4 INDICATOR 0 (3/4) (2/2) VINCENT DAM (1560/5990) (5760/5990) 2.18 MILES SSE OF SITE K-40 NA 14030 13750 14750 16B2 INDICATOR 0 (4/4) (2/2) (2/2) LINFIELD BRIDGE (8920/17700) (13000/14500) (12900/16600) 1.35 MILES SSE OF SITE MN-54 NA <LLD <LLD C0-58 NA <LLD <LLD CO-60 NA <LLD <LLD 0 1-131 NA <LLD <LLD CS-134 150 <LLD <LLD.

CS-137 180 169 <LLD 176 1662 INDICATOR 0 (2/4) (1/2) LINFIELD BRIDGE (162/176) 1.35 MILES SSE OF SITE

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

A-4

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility: LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 GR-B 258 10 16 16 17 13C1 INDICATOR 0 (E-3 PCI/CU.METER) (202/206) (51/52) (49/51) KING ROAD (7/33) (8/38) (9/32) 2.84 MILES SE OF SITE GAMMA 20 BE-7 NA 89 83.4 98.3 13C1 INDICATOR 0 (16/16) (4/4) (4/4) KING ROAD (56/156) (49.1/134) (63.6/156) 2.84 MILES SE OF SITE MN-54 NA <LLD <LLD 0 CO-58 NA <LLD <LLD 0 CO-60. NA <LLD <LLD 0

  • CS-134 10 <LLD <LLD 0 CS-1 37 10 <LLD <LLD 0 AIR IODINE GAMMA 258 (E-3 PCI/CU.METER) 1-131 70 <LLD <LLD 0 MILK 1-131 118 1 <LLD <LLD 0 (PCI/LITER)

GAMMA 118 K-40 NA 1272 1239 1314 19B1 INDICATOR 0 (92/92) (26/26) (22/22)

(1080/1460) (1050/1360) (1140/1400) 1.95 MILES SSW OF SITE MILK CS-134 15 <LLD <LLD 0 (PCI/LITER)

CS-137 18 <LLD <LLD 0 I

  • 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)

A-5

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility: LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 BA-140 60 <LLD <LLD 0 (PCI/LITER)

LA-140 15 <LLD <LLD 0 VEGETATION GAMMA 43 (PCI/KG WET) BE-7 NA 227 649 649 31G1 CONTROL (21/29) (9/14) (9/14)

(90/724) (74/2060) (74/2060)

K-40 NA 3853 4371 4371 31G1 CONTROL (29/29) (14/14) (14/14)

(1680/7060) *(2010/5640) (2010/5640)

MN-54 NA <LLD <LLD 0 CO-58 NA <LLD <LLD CO-60 NA <LLD <LLD 1-131 60 <LLD <LLD 0 CS-134 60 <LLD <LLD CS-137 80 <LLD <LLD RA-226 NA 832 227 878 13S3 INDICATOR 0 (15/29) (1/14) (14/15) VINCENT DAM (165/1680) (165/1680) 0.24 MILES SE OF SITE

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

A-6

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR ANNUAL

SUMMARY

FOR THE LIMERICK GENERATING STATION, 2008 Name of Facility: LIMERICK GENERATING STATION DOCKET NUMBER: 50-352 & 50-353 Location of Facility: MONTGOMERY COUNTY PA 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 TH-228 NA 26 26 30 13S3 INDICATOR 0 (PCI/KG WET) (13/29) (8/14) (8/15) VINCENT DAM (10/53) (12/56) (10/53) 0.24 MILES SE OF SITE TH-232 NA 20 29 29 31G1 CONTROL 0 (1/29) (3/14) (3/14)

(17/46) (17/46)

DIRECT RADIATION TLD-QUARTERLY 160 NA 7.8 9.2 11.9 13S2 INDICATOR 0 (MILLI-ROENTGEN/STD.M O. (156/156) (4/4) (4/4) 500 KV SUBSTATION (5.5/12.6) (8.7/9.9) (10.5/12.6) 0.41 MILES SE

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

A-7

Intentionally Left Blank A-8

APPENDIX B LOCATION DESIGNATION, DISTANCE &

DIRECTION, AND SAMPLE COLLECTION &

ANALYTICAL METHODS

TABLE B-i: Location Designation and Identification System for the Limerick Generating Station xxYz - General code for identification of locations, where:

XX - Angular Sector of Sampling Location. The compass is divided into 36 sectors of 10 degrees each with center at Limerick's Units 1 and 2 off-gas vents. Sector 36 is centered due North, and others are numbered in a clockwise direction.

Y - Radial Zone of Sampling Location (in this report, the radial distance from the Limerick vent for all regional stations).

S on-site location E : 4-5 miles off-site A 0-1 mile off-site F : 5-10 miles off-site B 1-2 miles off-site G : 10-20 miles off-site C 2-3 miles off-site H : 20-100 miles off-site D 3-4 miles off-site Z Station's Numerical Designation within sector and zone, using 1, 2, 3... in each sector and zone.

B-1

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Limerick Generating Station, 2008 Location Location Description Distance & Direction From Site A S,'d@e Water 13B1 Vincent Dam (indicator) 1.75 miles SE 24S1 Limerick Intake (control) 0.20 miles SW 10F2 Perkiomen Pumping Station (control) 7.25 miles E R Drinpinoý (Rpfphlaj jAl@nr 15F4 Philadelphia Suburban Water Company (indicator) 8.62 miles SE 15F7 Phoenixville Water Works (indicator) 6.33 miles SSE 16C2 Citizens Home Water Company (indicator) 2.66 miles SSE 28F3 Pottstown Water Authority (control) 5.84 miles WNW

, MAiIL-hi- 'eekly / nmonthlhy 10F4 6.60 miles ESE 18E1 4.21 miles S 19B1 1.95 miles SSW 23F1 Control 5.02 miles SW 25C1 2.69 miles WSW n Milk - q,-rterly 25E1 4.27 miles WSW 36E1 Control 4.70 miles N P Air P-,ti-',nttc I Air Iodine 10S3 Keen Road 0.50 miles E 11S1 LGS Information Center 0.38 miles ESE 11S2 LGS Information Center 0.38 miles ESE 13C1 King Road 2.84 miles SE 14S1 Longview Road 0.63 miles SSE 22G1 Manor Substation (control) 17.73 miles SW F. F=*sh 16C5 Vincent Pool (indicator) Downstream of Discharge 29C1 Pottstown Vicinity (control) Upstream of Intake r_1 'diment 16B2 Linfield Bridge (indicator) 1.35 miles SSE 16C4 Vincent Dam (indicator) 2.18 miles SSE 33A2 Upstream of Intake (control) 0.84 miles NNW H flrna, I eat Veogetation 11S3 LGS Information Center 0.35 miles ESE 13S3 LGS 500 KV Yard 0.24 miles SE 31G1 Prout's Jollyview Farm 13.6 miles NW B-2

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Limerick Generating Station, 2008 Location Location Description Distance & Direction From Site II W- WU=Q.rpeflglrp I plr=nprru - 11 36S2 Evergreen & Sanatoga Road 0.60 miles N 3S1 Sanatoga Road 0.44 miles NNE 5S1 Possum Hollow Road 0.45 miles NE 7S1 LGS Training Center 0.59 miles ENE 10S3 Keen Road 0.50 miles E 11S1 LGS Information Center 0.38 miles ESE 13S2 500 KV Substation 0.41 miles SE 14S1 Longview Road 0.63 miles SSE 18S2 Rail Line along Longview Road 0.26 miles S 21S2 Near Intake Building 0.19 miles SSW 23S2 Transmission Tower 0.53 miles SW 25S2 Sector Site Boundary 0.46 miles WSW 26S3 Met. Tower #2 0.40 miles W 29S1 Sector Site Boundary 0.55 miles WNW 31S1 Sector Site Boundary 0.26 miles NW 34S2 Met. Tower #1 0.58 miles NNW Intfnrgrei~u nintnp, 36D1 Siren Tower No. 147 3.51 miles N 2E1 Laughing Waters GSC 4.76 miles NNE 4E1 Neiffer Road 4.78 miles NE 7E1 Pheasant Road 4.26 miles ENE 1OE1 Royersford Road 3.94 miles E 10F3 Trappe Substation 5.58 miles ESE 13E1 Vaughn Substation 4.31 miles SE 16F1 Pikeland Substation 5.04 miles SSE 19D1 Snowden Substation 3.49 miles S 20F1 Sheeder Substation 5.24 miles SSW 24D1 Porters Mill Substation 3.97 miles SW 25D1 Hoffecker & Keim Streets 3.99 miles WSW 28D2 W. Cedarville Road 3.83 miles W 29E1 Prince Street 4.95 miles WNW 31D2 Poplar Substation 3.87 miles NW 34E1 Vamell Road 4.59 miles NNW Control and QPOciall ntgornt 5H1 Birch Substation (control) 24.76 miles NE 6C1 Pottstown Landing Field 2.14 miles NE 9C1 Reed Road 2.15 miles E 13C1 King Road 2.84 miles SE 15D1 Spring City Substation 3.20 miles SE 1781 Linfield Substation 1.60 miles S 20D1 Ellis Woods Road 3.06 miles SSW 311D1 Lincoln Substation 3.00 miles WNW B-3

TABLE B-3: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Limerick Generating Station, 2008 Sample Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Medium Surface Water Gamma Monthly composite RMC-ER5 Collection of water samples for 2 gallon TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy from a continuous radiological analysis (Limerick Generating water compositor. Station) Env. Inc., GS-01 Determination of gamma emitters by gamma snectroscopy Surface Water Tritium Quarterly composite RMC-ER5 Collection of water samples for 500 ml TBE, TBE-2011 Tritium analysis in drinking water by from a continuous radiological analysis (Limerick Generating liquid scintillation water compositor. Station)

Env. Inc., T-02 Determination of tritium in water (direct method)

Drinking Water Gross Beta Monthly composite RMC-ER5 Collection of water samples for 2 gallon TBE, TBE-2008 Gross Alpha and/or gross beta activity in from a continuous radiological analysis (Limerick Generating various matrices water compositor. Station)

Env. Inc., W(DS)-01 Determination of gross alpha and/or gross beta in water (dissolved solids or total residue)

Env. Inc., W(SS)-02 Determination of gross alpha and/or gross- beta Onwater (ustjptndpd s*nlid.g Drinking Water Gamma Monthly composite RMC-ER5 Collection of water samples for 2 gallon TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy from a continuous radiological analysis (Limerick Generating water compositor. Station) Env. Inc., GS-01 Determination of gamma emitters by gamm;; spectroscopy Drinking Water Tritium Quarterly composite RMC-ER5 Collection of water samples for 500 ml TBE, TBE-201 1 Tritium analysis in drinking water by from a continuous radiological analysis (Limerick Generating liquid scintillation water compositor. Station)

Env. Inc., T-02 Determination of tritium in water (direct method)

Fish Gamma Semi-annual samples RMC-ER6 Collection of fish samples for 1000 grams (wet) TBE-2007 Gamma emitting radioisotope analysis Spectroscopy collected via radiological analysis (Limerick Generating electroshocking or Station) Env. Inc., GS-01 Determination of gamma emitters by other techniques gamma gpectro.scopy Sediment Gamma Semi-annual grab RMC-ER7 Collection of sediment samples for 500 grams (dry) TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy samples radiological analysis (Limerick Generating Station) Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Particulates Gross Beta One-week composite of RMC-ER8 Collection of air particulate and air 1 filter TBE, TBE-2008 Gross Alpha and/or gross beta activity in continuous air iodine samples for radiological analysis (approximately 280 various matrices sampling through glass (Limerick Generating Station) cubic meters weekly) fiber filter paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters B -4

TABLE B-3: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Limerick Generating Station, 2008 Sample Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Medium Air Particulates Gamma Quarterly composite of TBE, TBE-2023 Compositing of samples 13 filters TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy each station (approximately 3600 Env. Inc., AP-03 Procedure for compositing cubic meters) Env. Inc., GS-01 Determination of gamma emitters by air particulate filters for gamma spectroscopic gamma spectroscopy analysis Air Iodine Gamma One-week composite of RMC-ER8 Collection of air particulate and air 1 filter TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy continuous air iodine samples for radiological analysis (approximately 280 sampling through (Limerick Generating Station) cubic meters weekly) Env. Inc., 1-131-02 Determination of 1-131 in charcoal charcoal filter canisters by oamma spectroscopy (batch method)

Milk 1-131 Bi-weekly grab sample RMC-ER10 Collection of milk samples for 2 gallon TBE, TBE-2012 Radioiodine in various matrices when cows are on radiological analysis (Limerick Generating pasture. Monthly all Station) Env. Inc., 1-131-01 Determination of 1-131 in milk by anion other times exchange Milk Gamma Bi-weekly grab sample RMC-ER10 Collection of milk samples for 2 gallon TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy when cows are on radiological analysis (Limerick Generating pasture. Monthly all Station) Env. Inc., GS-01 Determination of gamma emitters by nther times gamma spectroscopv TLD Thermoluminescence Quarterly TLDs RMC-ER9 Collection of TLD samples for 2 dosimeters Global Dosimetry Dosimetry comprised of two radiological analysis (Limerick Generating Panasonic 814 Station)

(containing 3 each CaSOA elements)

B-5

I Figure B-I Environmental Sampling Locations Within One Mile of the Limerick Generating Station, 2008 B- 6

NNE NE.

WS1 ss1 Figure B-2 Environmental Sampling Locations Between One and Five Miles from the Limerick Generating Station, 2008 B-7

Figure B-3 Environmental Sampling Locations Greater than Five Miles from the Limerick.Generating Station, 2008 B-8

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY

TABLE C-I.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION 10F2 13B1 24S1 PERIOD 12/31/2007 - 03/31/2008 (1) < 168 < 165 03/31/2008 - 06/30/2008 (1) < 174 < 177 07/14/2008 - 09/29/2008 < 148 < 151 < 135 09/29/2008 - 12/29/2008 < 179 < 174 < 173 MEAN C-1

TABLE C-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED INTHE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD (1) 10F2 07/14/2008 - 07/29/2008 < 1 < 1 < 2 < 1 <2 < 1 < 2 < 12 < 1 < 1 < 16 <4 07/29/2008 - 09/02/2008 < 3 <3 < 6 <2 < 5 < 3 < 5 < 15 <2 <3 < 26 < 8 09/02/2008 - 09/29/2008 < 2 <2 <4 <2 < 3 <2 <4 < 12 <2 <2 < 21 <6 09/29/2008 - 11/03/2008 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 11 < 1 < 1 < 41 < 12 11/03/2008 - 12/02/2008 < 3 <4 < 7 <4 < 7 <3 < 7 < 7 < 3 <4 <20 < 5 12/02/2008 - 12/29/2008 < 3 < 3 <6 < 3 <6 <4 < 5 < 11 < 3 < 3 <23 < 8 MEAN - - - - - - - - - - -

13B1 12/31/2007 01/29/2008 < 5 < 6 < 13 < 5 < 10 < 6 < 9 < 5 <4 < 5 < 21 < 8 01/29/2008 -03/04/2008 < 4 <4 < 9 < 5 <9 <4 < 7 < 5 <4 < 5 < 18 < 6 03/04/2008 -03/31/2008 < 3 <2 <4 < 3 <5 < 3 < 5 < 5 < 3 < 3 < 14 < 3 03/31/2008 -04/28/2008 < 4 <4 < 8 <4 <9 <4 < 8 < 7 <4 <4 < 19 < 6 04/28/2008 -06/03/2008 < 4 < 5 < 11 < 6 < 10 < 5 < 8 < 13 <4 < 5 < 27 < 13 06/03/2008 -06/30/2008 < 2 < 2 < 5 < 2 < 5 < 3 < 5 < 15 < 2 <2 < 24 < 6 06/30/2008 -07/29/2008 < 1 < 1 < 2 < 1 <2 < 1 < 2 < 12 < 1 < 1 < 15 < 5 07/29/2008 -09/02/2008 < 2 < 2 < 5 < 2 < 5 < 3 < 5 < 13 <2 <2 < 26 < 7 09/02/2008 -09/29/2008 < 2 < 2 < 5 <2 <4 <2 < 3 < 12 <2 <2 < 20 < 7 09/29/2008 -11/03/2008 < 1 < 1 < 3 <1 <2 < 1 <2 < 11 < 1 < 1 < 36 < 14 11/03/2008 - 12/02/2008 < 7 < 5 < 12 <4 < 13 < 6 < 10 < 14 < 5 <5 < 32 < 10 12/02/2008 -12/29/2008. < 3 < 3 < 8 <3 <6 <4 < 5 < 12 < 3 < 3 <24 < 7 MEAN C-2

TABLE C-I1.1 CONCENTRATIONS OF GROSS BETA IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION 15F4 15F7 16C2 28F3 PERIOD 12/31/2007 - 01/29/2008 2.6 +/- 1.6 2.7 + 1.5 < 2.2 3.0 +/- 1.6 01/29/2008 - 03/04/2008 2.3 +/- 1.5 3.2 + 1.5 3.3 +/- 1.6 3.1 +/- 1.5 03/04/2008 - 03131/2008 3.9 +/- 1.6 2.7 +/- 1.5 < 2.1 2.9 +/- 1.5 03/31/2008 - 04/28/2008 3.6 +/- 1.5 4.5 + 1.6 2.8 +/- 1.5 2.3 +/- 1.5 04/28/2008 - 06/03/2008 4.0 +/- 1.7 3.0 +/- 1.6 3.4 +/- 1.7 2.5 +/- 1.6 06/03/2008 - 06/30/2008 3.9 +/- 1.8 4.3 + 1.8 3.8 +/- 1.8 3.3 +/- 1.8 06/30/2008 - 07/29/2008 5.5 +/- 1.8 6.1 + 1.8 4.2 +/- 1.7 3.6 +/- 1.7 07/29/2008 - 09/02/2008 5.4 +/- 2.2 4.7 +/- 2.2 6.0 +/- 2.3 4.0 +/- 2.2 09/02/2008 - 09/29/2008 5.8 +/- 1.9 7.2 +/- 2.0 3.8 +/- 1.8 4.0 +/- 1.8 09/29/2008 - 11/03/2008 5.7 +/- 1.9 5.0 +/- 1.9 3.2 +/- 1.7 5.1 +/- 1.9 11/03/2008 - 12/02/2008 5.8 +/- 1.7 6.7 +/- 1.8 4.6 +/- 1.6 3.5 +/- 1.5 12/02/2008 - 12/29/2008 4.3 +/- 1.9 < 2.5 3.3 +/- 1.9 2.8 +/- 1.8 MEAN 4.6 +/- 2.3 4.7 +/- 3.1 3.8 +/- 1.8 3.4 +/- 1.6 TABLE C-II.2 CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION 15F4 15F7 16C2 28F3 PERIOD 12/31/2007 - 03/31/2008 < 168 < 165 < 160 < 164 03/31/2008 - 06/30/2008 < 176 < 177 < 178 < 176 06/30/2008 - 09/29/2008 < 147 < 145 < 147 < 148 09/29/2008 - 12/29/2008 < 174 < 174 < 172 < 174 MEAN C-3

TABLE C-II.3 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD 15F4 12/31/2007 - 01/29/2008 <5 < 10 <4 < 11 <5 <8 <7 <5 <5 < 20 <7

<5 01/29/2008 - 03/04/2008 <5

  • 10 <5 < 10 < 5 <8 <6 < 19 <7

<5 <5 03/04/2008 - 03/31/2008 <4 <5 < 11 <5 <9 <6 <8 <9 <5 < 5 < 23 <7 03/31/2008 - 04/28/2008 <5 <5 < 10 <4 <9 <3 < 8 < 10 < 5 <6 < 25 <7 04/28/2008 - 06/03/2008 <4 < 5 < 12 <4 < 11 <4 <9 <13 <4 <5 < 32 < 11 06/03/2008 - 06/30/2008 <1 <2 <3 <1 <3 <2 <3 < 10 <1 <1 < 17 <5 06/30/2008 - 07/29/2008 <1 <1 <1

<2 <1 <2 <1 <2 < 12 < 1 < 15 <4

<2 07/29/2008 - 09/02/2008 <2 <3 <7 <3 <5 <3 <5 < 14 <3 < 25 <8 09/02/2008 - 09/29/2008 <2 <2

<2 <5 <2 <4 <2 <4

  • 14 < 2 < 25 <7 09/29/2008 - 11/03/2008 <1 <1 <3 <1 <2 <2 < 2 <12 <1 <1 < 53 < 13 11/03/2008 - 12/02/2008 <6 <7 < 11 <6 < 10 <6 <9 < 14 <6 <6
  • 31 < 13 12/02/2008 - 12/29/2008 <3 <3 <7 <4 <7 <4 <7 < 12 <3 <3 < 26 <7 MEAN 15F7 12/31/2007 - 01/29/2008 <5 <5 < 12 <7 < 11 <5 <7 <7 <5 <6 < 21 <7 01/29/2008 - 03/04/2008 <5 <5 < 10 <6 < 12 <6 < 10 <7 <5 <7 < 20 <7 03/04/2008 - 03/31/2008 <3 <2 <5 <4 <6 <3 <5 <5 <3 <2 < 13 <4 03/31/2008 - 04/28/2008 <4 <4 < 11 <4 <7 <6 <8 <8 <5 <5 < 21 <6 04/28/2008 - 06/03/2008 <4 <4 <8 <3 <8 <4 <7 < 12 <4 <4 < 24 <7 06/03/2008 - 06/30/2008 <2 <2 <4 <2 <4 <2 <3 <11 <2 <2 < 19 <6 06/30/2008 - 07/29/2008 <1 <1 <2 <1 <2 <1 <2 < 12 <1 <1 < 16 <4 07/29/2008 - 09/02/2008 <2 <2 <5 <2 <4 <3 <4 < 13 <2 <2 < 22 <8 09/02/2008 - 09/29/2008 <2 <2 <4 <2 <3 <2 <3 <11 <1 <2 <18 <6 09/29/2008 - 11/03/2008 <1 <1 <3 <1 <2 <1 <3 < 11 <1 <1 < 44 < 12 11/03/2008 - 12/02/2008 <5 <5 < 10 <5 < 10 <6 <7 -<12 <5 <5
  • 27 <7 12/02/2008 - 12/29/2008 <3 <4 <8 <3 <8 <5 <7 < 13 <3 <4 < 26 <9 MEAN C-4

TABLE C-II.3 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD 16C2 12/31/2007 - 01/29/2008 <4 <4 < 8 < 5 < 8 <4 <7 <6 <4 <4 <17 <5 01/29/2008 - 03/04/2008 <5 <5 <9 <4 <11 <4 <8 <6 <5 <5 < 16 <5 03/04/2008 - 03/31/2008 <4 <6 < 11 <6 <8 <4 < 10 <9 <5 <6 < 29 <8 03/31/2008 - 04/28/2008 <4 <4 <8 <5 <9 < 4 <7 <8 <4 <5 *21 <7 04/28/2008 - 06/03/2008 <5 <5 <9 <5 < 11 <6 < 10 <.13 <5 <5 < 30 <11 06/03/2008 - 06/30/2008 <2 <2 <5 <2 <4 <2 <4 < 13 <2 <2 < 22 <7 06/30/2008 - 07/29/2008 <1 <1 <3 <1 <2 <1 <2 < 15 <1

<1 < 19 <6 07/29/2008 - 09/02/2008 <2 <3 <6 <4 <5 <3 <5 < 14 <2 <2 < 25 <9 09/02/2008 - 09/29/2008 <2 <2 <4 <1 <3 <2 <3 <11 <1 <2 <18 <6 09/29/2008 - 11/03/2008 <1 <1 <4 <1 <2 <1 <2 <12 <1 <1

  • 50 < 14 11/03/2008 - 12/02/2008 <6 <6 < 13 <6 < 11 <7 < 11 < 14 <5 <7 < 31 <9 12/02/2008 - 12/29/2008 <3 <5 < 11 <4 < 9 <4 <7 < 14 <4 <4 < 32 < 10 MEAN 28F3 12/31/2007 - 01/29/2008 <5 <6 <11 <6 <15 <6 <9 <7 <5 <6 < 23 <7 01/29/2008 - 03/04/2008 <5 <5 <10 <5 <9 <5 <9 <5 <5 <5
  • 20 <5 03/04/2008 - 03/31/2008 <3 <4 <6 <4 <7 <3 <6 <6 <3 <4 < 14 <5 03/31/2008 - 04/28/2008 <4 <5 < 12 <5 < 10 <4 <9 < 11 <5 <6 < 30 <7 04/28/2008 - 06/03/2008 <4 <4 <10 <5 < 11 <5 <8 <12 <4 <5 < 25 <10 06/03/2008 - 06/30/2008 <2 <2 <4 <2 <3 <2 <3 <11 <1 <2 <18 <5 06/30/2008 - 07/29/2008 <1 <1 <3 <1 <2 <1 <2 < 13 <1 <1 <17 <5 07/29/2008 - 09/02/2008 <2 <2 <5 <2 <5 <3 <4 < 12 <2 <2 < 24 <7 09/02/2008 - 09/29/2008 <2 <2 <4 <1 <3 <2 <3 < 13 <2 <2 '< 21 <6 09/29/2008 - 11/03/2008 <1 <1 <3 <1 <2 <1 <2 < 11 <1 -<1 < 35 < 15 11/03/2008 - 12/02/2008 <4 <5 < 11 <7 <9 <5 < 10 <12 <5 <5 < 25 < 10 12/02/2008 - 12/29/2008 <4 <4 < 10 <5 <7 <4 <8
  • 14 <4 <4 < 26 < 10 MEAN C-5

TABLE C-II1.1 CONCENTRATIONS OF GAMMA EMMITTERS IN PREDATOR AND BOTTOM FEEDER (FISH)

SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 1-131 Cs-134 Cs-137 PERIOD 16C5 PREDATOR 05108/2008 3300 +/- 508 < 27 < 31 < 73 < 24 < 68 < 72 < 26 < 28 10/14/2008 3290 +/- 766 < 35 < 53 < 100 < 41 < 86 < 516 < 42 < 39 MEAN 3295 +/- 14 16C5 BOTTOM FEEDER 05/08/2008 2660 +/- 559 < 31 < 28 < 75 < 38 < 57 < 79 < 26 < 31 10/14/2008 3460 +/- 621 < 40 < 37 < 88

  • 39 < 75 < 323 < 28 < 35 MEAN 3060 +/- 1131 29C1 PREDATOR 05/07/2008 2690 +/- 731 < 36 < 36 < 92 < 46 < 95 < 105 < 42 < 41 10/13/2008 2850 +/- 635 < 47 < 51
  • 105 < 46 < 91
  • 490 < 45 < 47 MEAN 2770 +/- 226 -

29C1 BOTTOM FEEDER 05/07/2008 3680 +/- 629 < 39 < 35 < 73 < 37 <84 < 95 < 38 < 37 10/13/2008 3350 +/- 598 < 41 < 46 < 105 < 32 < 95 < 454 < 40 < 37 MEAN 3515 +/- 467 -

C-6

TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Co-60 1-131 Cs-1 34 Cs-1 37 PERIOD m

16B2 06/11/2008 1560 +/- 774 16600 +/- 1780 < 103 < 83- < 90 < 235 < 65 176 +/- 69 12/08/2008 814 12900 +/- 1440 < 66 < 87 < 45 < 1550 < 55 < 77 MEAN 1560 +/- 0 14750 +/- 5233 - - - - - 176 +/- 0 16C4 06/11/2008 5760 +/- 1140 17700 +/- 2180 < 129 < 108 < 119 < 337 < 94 162 +/- 123 12/08/2008 5990 +/- 1520 8920 +/- 1370 < 128 < 122 < 144 < 4030 < 100 < 124 MEAN 5875 +/- 325 13310 +/- 12417 - - - - - 162 +/- 0 33A2 06/11/2008 795 13000 +/- 1650 < 85 < 75 < 75 < 220 < 71 < 74 12/08/2008 766 14500 +/- 1450 < 62 < 63 < 53 < 1340 < 59 < 58 MEAN 13750 +/- 2121 - - - - -

C-7

TABLE C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I I GROUPI1I GROUP Ill COLLECTION PERIOD 10S3 liSi 14S1 1301 22G1 12131/2007( - 110U120UU 21+/- 5 23+/- 6 1b+/-b 29+/-6 24 +/-6 01/07/2008 -01/14/2008 13 +/- 5 12 +/- 5 15 +/-5 12 +/-5 16 +/- 5 01/14/2008 -01/22/2008 19 +/- 4 15 +/- 5 21 +/-5 22 +/-5 20 +/- 5 01/22/2008 -0 1/28/2008 21 +/-6 24 +/- 6 22 +/-6 21 +/-6 22 +/-6 01/28/2008 -02/04/2008 27 +/-5 32 +/- 6 28 +/-6 23 +/-5 27 +/-6 02/04/2008 -02/11/2008 15 +/-5 18 +/- 5 15 +/-5 14 +/-5 18 +/-5 02/11/2008 -02/19/2008 19 +/-5 18 +/- 5 21 +/-5 18 +/-5 19 +/-5 02/19/2008 -02/25/2008 12 +/-5 22 +/- 6 17 +/-6 16 +/-6 17 +/-6 02/25/2008 -03/03/2008 10 +/-5 10 +/- 5 12 +/-5 12 +/-5 15 +/-5 03/03/2008 -03/10/2008 12 +/-5 12 +/- 5 10 +/-5 13 +/-5 9+/-5 03/10/2008 -03/17/2008 19 +/-5 19 +/- 5 22 +/-5 16 +/-5 20 +/-5 03/17/2008 -03/24/2008 14 t 4 15 +/- 5 14 +/-5 11 +/-5 11 +/-5 03/24/2008 -03/31/2008 12 +/- 5 16 +/- 5 16 +/-5 16 +/-5 17 +/-5 03/31/2008 -04/07/2008 13 +/- 4 15 +/- 4 13 +/-4 14 +/-4 13 +/-4 04/07/2008 -04/14/2008 8+/-4 8+/-4 7+/-5 11 +/-5 10 +/-5 04/14/2008 -04/21/2008 17 +/-5 14 +/-5 18 +/-5 21 +/-5 19 +/-5 04/21/2008 -04/28/2008 18 +/-5 18+/-5 15 +/-5 18 +/-5 18 +/-5 04/28/2008 -05/05/2008 16 +/-4 17 +/-5 20 +/-5 15 +/-5 18 +/-5 05/05/2008 -05/12/2008 13 +/-4 13 +/-5 15 +/-5 14 +/-5 15 +/-5 05/12/2008 - 05/20/2008 10 +/-4 10 +/-4 9+/-4 <6 12 +/-4 05/20/2008 - 05/27/2008 7+/-4 8+/-4 7+/-4 9+/-5 8+/-5 05/27/2008 - 06/02/2008 14 +/-5 8+/-5 16 +/-5 15 +/- 6 11 +/-5 06/02/2008 - 06/09/2008 9+/-4 13 +/-5 10 +/-5 13 +/- 5 9+/-5 06/09/2008 - 06/16/2008 15 +/-5 19 +/-5 17 +/-5 18 +/- 5 15 +/-5 06/16/2008 - 06/23/2008 13 +/-4 12 +/-5 12 +/-5 16 +/- 5 13 +/-5 06/23/2008 - 06/30/2008 16 +/-5 17+/-5 14 +/-5 14 +/- 5 14 +/-5 06130/2008 - 07/0712008 14 +/-5 16 +/-5 17 +/-5 13 +/- 5 19 +/-5 07/07/2008 - 07/14/2008 15 +/-5 13 +/-5 12 +/-5 15 +/- 5 14 +/-5 07/14/2008 - 07/21/2008 18 +/-5 24 +/-6 20 +/-6 26 +/- 6 22 +/-6 07/21/2008 - 07/28/2008 17 +/-5 19 +/-5 (1) 24 +/- 5 21 +/- 5 07/28/2008 - 08/04/2008 22 +/-5 22 +/-5 21 +/-5 18 +/- 5 24 +/- 5 08/04/2008 - 08/11/2008 13 +/-5 14 +/-5 19 +/-5 14 +/- 5 14 +/- 5 08/11/2008 - 08/18/2008 15 +/-5 17 +/-5 17 +/-5 14 +/- 5 14 +/- 5 08/18/2008 - 08/25/2008 16 +/-5 18 +/-5 16 +/-5 14 +/-5 18 +/- 5 08/25/2008 - 09/01/2008 11 +/- 5 13 +/- 5 13 +/- 5 12 +/-5 9+/-5 09/01/2008 - 09/09/2008 25 +/-5 22 +/-5 22 +/-5 23 +/-5 22 +/-5 09/09/2008 - 09/15/2008 13 +/-5 15 +/-6 13 +/-5 18 +/-6 21+/-6 09/15/2008 - 09/22/2008 14 +/- 5 11 +/- 4 20 +/- 5 15 +/-5 16 +/-5 09/22/2008 - 09/29/2008 10 +/-5 10 +/-5 10 +/-5 (1) 10 +/-5 09/29/2008 - 10/07/2008 11 +/- 4 13 +/- 4 12 +/- 4 15 +/-4 17 +/-5 10/07/2008 - 10/13/2008 20 +/-6 21 +/-6 19 +/-6 21 +/-6 17 +/- 6 10/13/2008 - 10/20/2008 21 +/-6 22 +/-6 24 +/-6 21 +/-6 19 +/- 6 10/20/2008 - 10/27/2008 15 +/-5 14 +/-5 15 +/-5 15 +/-5 .12 +/- 5 10/27/2008 - 11/04/2008 16 +/-4 17 +/-5 19 +/-5 17 +/- 4 17 +/- 5 11/04/2008 - 11/10/2008 17 +/-5 14+/-t5 11 +/-5 19 +/- 6 16 +/- 5 11/10/2008 - 11/17/2008 10 +/-5 7 <7 <7 <7 11/17/2008 - 11/24/2008 14 +/-5 17 +/-5 14 +/-5 16 +/- 5 14 +/- 5 11/24/2008 - 12/01/2008 20 +/-5 23 +/-5 21 +/-5 24 +/- 5 19 +/- 5 12/01/2008 - 12/08/2008 19 +/-5 17 +/-5 17 +/-5 17 +/- 5. 14 +/- 5 12/08/2008 - 12/15/2008 18 +/-5 17 +/-5 17 +/-5 16 +/- 5 15 +/- 5 12/15/2008 - 12/22/2008 14 +/- 5 17 +/- 5 11 +/-5 11+/- 5 13 +/- 5 12/22/2008 - 12/29/2008 28 +/-5 33 +/-6 32+/-6 32 +/-6 38 +/- 6 MEAN 16 +/-9 17 +/-10 16+/-10 17 +/-10 16 +/-11

  • THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-8

TABLE C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED INTHE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - ON-SITE LOCATIONS GROUP I - INTERMEDIATE DISTANCE LOCATIONS GROUP III - CONTROL LOCATIONS COLLECTION MIN MAX MEAN- COLLECTION MIN MAX MEAN+ COLLECTION MIN MAX MEAN+

PERIOD 2SD PERIOD 2SD PERIOD 2SD 1//13 IILUU - U IIlOIZUUO Iz ZL-+ 0.0 " . 123IJ0IIU7 - V1(LWIUO Ilz ZZI 4I.U +/- 1-.2 12/31/07 - 01/28/08 16 24 20.4 +/- 6.9 01/28/2008 02/25/2008 12 32 20.1 +/- 11.7 01/28/08 02/25/08 14 23 17.7 +/- 7.5 01/28/08 - 02/25/08 17 27 20.1 +/- 8.9 02/25/2008 03/31/2008 10 22 14.2 +/- 7.3 02/25/08 03/31/08 11 16 13.6 +/- 5.2 02/25/08 - 03/31/08 9 20 14.3 +/- 8.9 03/31/2008 04/28/2008 7 18 13.7 +/- 8.1 03/31/08 04/28/08 11 21 16.2 +/- 9.0 03/31/08 - 04/28/08 10 19 15.0 +/- 7.9 04/28/2008 06/02/2008 7 20 12.3 +/- 8.1 04/28/08 06/02/08 9 15 13.2 +/- 5.7 04/28/08 - 06/02/08 8 18 12.9 +/- 7.3 06/02/2008 06/30/2008 9 19 13.8 +/- 5.9 06/02/08 06/30/08 13 18 15.1 +/- 4.5 06/02/08 - 06/30/08 9 15 12.5 + 5.4 06/30/2008 07/28/2008 12 24 16.8 +/- 6.7 06/30/08 07/28/08 13 26 19.6 +/- 13.2 06/30/08 - 07/28/08 14 22 18.9 +/- 7.2 07/28/2008 09/01/2008 11 22 16.4 +/- 7.0 07/28/08 09/01/08 12 18 14.5 +/- 4.0 07/28/08 - 09/01/08 9. 24 15.7 +/- 11.4 09/01/2008 09/29/2008 10 25 15.5 +/- 10.7 09/01/08 09/22/08 15 23 18.4 +/- 7.9 09/01/08 - 09/29/08 10 22 17.0 +/- 11.0 09/29/2008 10/27/2008 11 24 17.3 +/- 8.9 09/29/08 10/27/08 15 21 17.6 +/- 7.0 09/29/08 - 10/27/08 12 19 16.3 +/- 5.4 10/27/2008 12/01/2008 10 23 16.3 +/- 7.5 10/27/08 12/01/08 16 24 18.8 +/- 7.0 10/27/08 - 12/01/08 14 19 16.5 +/- 4.3 12/01/2008 12/29/2008 11 33 20.0 +/- 14.0 12/01/08 - 12/29/08 11 32 19.1 +/- 17.8 12/01/08 .- 12/29/08 13 38 19.9 +/- 24.3 12/31/2007 - 12/29/2008 7 " 33 16.1 +/- 9.8 12/31/07 - 12/29/08 11 32 16.9 +/- 9.6 12/31/07 - 12/29/08 8 38 16.5 +/- 10.5 C-9

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Be-7 Mn-54 Co-58 Co-60 Cs-134 Cs- 137 PERIOD 10US3 I 12/31/2007 - UOJIJIILLUUO I Ll 03/31/2008 - 06/30/2008 81 +/- 29 <2 <4 <3 <3 <2 06/30/2008 - 09/29/2008 111 +/- 77 <3 <8 <3 <4 <3 09/29/2008 - 12/29/2008 61 +/- 25 <3 <3 <2 <3 <2 MEAN 82 +/- 42 1iS1 12/31/2007 - 03/31/2008 76 +/- 21 <3 <3 <2 <3 <2 03/31/2008 - 06/30/2008 97 +/- 24 <2 <3 <2 <2 <2 06/30/2008 - 09/29/2008 145 +/- 73 <4 <10 <5 <5 <3 09/29/2008 - 12/29/2008 60 +/- 25 <4 <4 <3 <3 <3 MEAN 94 +/- 74 -

13C1 12/31/2007 - 03/31/2008 64 +/- 25 <3 <4 <3 <3 <2 03/31/2008 - 06/30/2008 94 +/- 28 <3 <4 <4 <3 <3 06/30/2008 - 09/29/2008 156 +/- 65 <4 <10 <4 <4 <4 09/29/2008 - 12/29/2008 79 +/- 22 <2 <3 <3 <2 <2 MEAN 98 +/- 81 -

14S1 12/31/2007 - 03/31/2008 68 +/- 33 <3 <4 <3 <3 <3 03/31/2008 - 06/30/2008 74 +/- 33 <3 <4 <2 <2 <2 06/30/2008 - 09/29/2008 128 +/- 75 <5 <12 <4 <5 <3 09/29/2008 - 12/29/2008 56 +/- 25 <3 <3 <3 <3 <3 MEAN 82 +/- 64 22G1 12/31/2007 - 03/31/2008 85 +/- 33 <3 <4 <4 <4 <4 03/31/2008 - 06/30/2008 66 +/- 31 <2 <4 <3 <3 <3 06/30/2008 - 09/29/2008 134 +/- 48 <5 <9 <3 <4 <3 09/29/2008 - 12/29/2008 49 +/- 19 <2 <3 <3 <3 <3 MEAN 83 +/- 73 C-10

TABLE C-VI.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I IGROUP 11 IGROUP III -J PERIOD 10S3 lisi 14Si 1301 22G1 12/31/2007 01/07/2008 *<19 *<31 *<31 < 31 *<31 01/07/2008 -01/14/2008 *15 *30 *31 < 31 *31 01/14/2008 -01/22/2008 *18 < 20 *20 *20 *12 01/22/2008 -01/28/2008 *26 *51 *51 *52 *51 01/28/2008 -02/04/2008 *16 *27 *27 *27 *27 02/04/2008- 02/11/2008 *31

  • 33 < 34 *25 *<34 02/11/2008 -02/19/2008 *20
  • 39
  • 39 < 40 < 39 02/19/2008 -02/25/2008 *29 < 47 *48 *48 *48 02/25/2008 -03/03/2008 *10 *21 *21 *21 *21 03/03/2008 -03/10/2008 < 22 *38
  • 39
  • 39
  • 39 03/10/2008 -03/17/2008 < 48 *52
  • 53
  • 54 *29 03/17/2008 -03/24/2008 *24 *40 *40 *40 < 40 03/24/2008 -03/31/2008 *14 *36 *36
  • 37 *36 03/31/2008 -04/07/2008 *16 < 18 *18 *18 04/07/2008 -04/14/2008 *19 < 42. *<42
  • 43 *42 04/14/2008 -04/21/2008
  • 57 *61 *62 *27 *62 04/21/2008 -04/28/2008 *19 *48 *<49
  • 49 < 49 04/28/2008 -05/05/2008 *23 *58
  • 59 *60
  • 59 05/05/2008 -05/12/2008
  • 33 *20
  • 37
  • 37
  • 37 05/12/2008 -05/20/2008 *17
  • 34
  • 34 < 35 *<34 05/20/2008 -05/27/2008
  • 25
  • 54 *56 < 55 *56 05/27/2008 -06/02/2008 *27 *68 *68 <70 *68 06/02/2008 -06/09/2008 *19
  • 49 *50 <50 *50 06/09/2008 -06/16/2008 *13 *27 *27 <28 *27 06/16/2008 -06/23/2008 *29
  • 57
  • 59 <58 *58 06/23/2008 -06/30/2008 < 44
  • 59
  • 59 < 59
  • 59 06/30/2008 -07/07/2008 *40 *66 *67 <66 *67 07/07/2008 -07/14/2008 *22 *41 < 41 <42 < 41 07/14/2008 -07/21/2008 *20 *29 *30 <29 *30 07/21/2008 - 07/28/2008 *12 *20 (1) < 20 *20 07/28/2008 - 08/04/2008 *23 *42 < 43 < 42 < 43 08/04/2008 - 08/11/2008
  • 37 *67 *67 <66 *68 08/11/2008 - 08/18/2008 *29 *69 *70 <69 *70 08/18/2008 - 08/25/2008 *23
  • 54 < 54 < 53
  • 54 08/25/2008 - 09/01/2008 *31 *62 < 64 <62 < 64 09/01/2008 - 09/09/2008 *22 *51 *51 <51 *51 09/09/2008 - 09/15/2008 *22 *50 *51 <50 < 49 09/15/2008 - 09/22/2008
  • 35
  • 44
  • 45 < 44 *46 09/22/2008 - 09/29/2008
  • 59
  • 59
  • 59
  • 59 09/29/2008 - 10/07/2008
  • 33 *65 *66 <65 *66 10/07/2008 - 10/13/2008 *24
  • 43
  • 44 < 43 *<44 10/13/2008 - 10/20/2008 *26 < 62 < 62 <61 *62 10/20/2008 - 10/27/2008 *23
  • 53
  • 54 < 53
  • 54 10/27/2008 - 11/04/2008 *25
  • 59
  • 59 <58 *60 11/04/2008 - 11/10/2008 *25 *60 *60 < 59 *60 11/10/2008 - 11/17/2008 *52 *68 < 58 <68 *58 11/17/2008 - 11/24/2008 *24
  • 57
  • 57 <56 < 57 11/24/2008 - 12/01/2008 *20 < 47 < 47 <46 < 47 12/01/2008 - 12/08/2008
  • 37
  • 55 *56 < 55 *56 12/08/2008 - 12/15/2008 *31 *63 *63 <62 *63 12/15/2008 - 12/22/2008 *28 *66 *67 <65
  • 67 12/22/2008 - 12/29/2008 *26
  • 59 *60 < 59
  • 60 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION 6-11

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARMS I INDICATOR FARMS COLLECTION 23F1 36E1 10F4 18E1 19B1 25C1 25E1 PERIOD 01/15/2008 < 0.6 < 0.7 < 0.5 < 0.7 < 0.7 < 0.7 < 1.0 02/12/2008 < 0.6 < 0.6 < 0.6 < 0.6 < 0.8 03/11/2008 < 0.6 < 0.9 < 0.7 < 0.6 < 0.5 04/01/2008 < 0.5 < 0.5 < 0.3 < 0.4 < 0.5 < 0.6 < 0.6 04/15/2008 < 0.5 < 0.6 < 0.5 < 0.6 < 0.5 04/29/2008 < 0.5 < 0.5 < 0.6 < 0.5 < 0.4 05/13/2008 < 0.8 < 0.8 < 0.9 < 0.8 < 0.7 05/27/2008 < 0.9 < 0.8 < 0.8 < 0.7 < 0.8 06/10/2008 < 0.8 < 0,6 < 0.8 < 0.7 < 0.9 06/24/2008 < 0.4 < 0.4 < 0.4 < 0.4 < 0.6 07/08/2008 < 0.8 < 0.8 < 0.7 < 0.8 < 0.7 < 0.8 < 0.6 07/22/2008 < 0.8 < 0.7 < 0.8 < 0.7 < 0.8 08/05/2008 < 0.6 < 0.7 < 0.6 < 0.6 < 0.7 08/19/2008 < 0.8 < 0.9 < 0.8' < 0.9 < 0.9 09/02/2008 < 0.6 < 0.6 < 0.5 < 0.5 < 0.6 09/16/2008 < 0.5 < 0.6 < 0.5 < 0.5 < 0.6 09/30/2008 < 0.9 < 1.0 < 0.8 < 0.9 < 0.9 10/14/2008 < 0.6 < 0.8 < 0.7 < 0.6 < 0.6 < 0.8 < 0.8 10/29/2008 <*0.8 < 0.6 < 0.9 < 0.8 < 0.8 11/11/2008 < 0.9 < 0.8 < 0.9 < 0.7 < 0.9 11/25/2008 < 0.7 < 0.7 < 0.7 < 0.8 < 0.8 12/16/2008 < 0.8 < 0.6 < 0.6 < 0.8 < 0.6 MEAN C-12

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION K-40 Cs-134 Cs-137 Ba-140 La-140 PERIOD 10F4 01/15/2008 1160 +/- 108 <4 <4 < 21 6 02/12/2008 1450 +/- 165 <8 <9 < 42 14 03/11/2008 1230 +/- 114 <4 <5 < 19 5 04/01/2008 1200 +/- 161 <6 <7 < 25 5 04/15/2008 1220 +/- 146 <7 <8 < 36 12 04/29/2008 1230 +/- 144 <5 <6 < 21 6 05/13/2008 1190 +/- 152 <6 <6 < 36 8 05/27/2008 1300 +/- 143 <6 <6 < 31 6 06/10/2008 1160 +/- 137 <5 <6 < 17 7 06/24/2008 1290 +/- 150 <7 <6 < 43 15 07/08/2008 1240 +/- 113 <4 <5 <31 8 07/22/2008 1320 +/- 129 <5 <6 < 44 14 08/05/2008 1410 +/- 135 <5 <6 < 59 12 08/19/2008 1190 +/- 138 <5 <6 < 41 11 09/02/2008 1220 +/- 123 <5 <6 < 36 10 09/16/2008 1370 +/- 151 <7 <7 < 43 11 09/30/2008 1280 +/- 55 <2 <2 < 52 15 10/14/2008 1280 +/- 134 <5 <6 < 44 14 10/29/2008 1230 +/- 54 <2 <2 < 48 14 11/11/2008 1290 +/- 42 <1 <1 <41 13 11/25/2008 1270 +/- 67 <1 <1 < 37 10 12/16/2008 1210 +/- 141 <6 <6 < 31 10 MEAN 1261 +/- 152 18E1 01/15/2008 1200 +/- 126 <5 <6 < 26 <9 02/12/2008 1370 +/- 132 <5 <6 <'24 <7 03/11/2008 1180 +/- 145 <7 <7 < 33 < 10 04/01/2008 1330 +/- 147 <6 <7 < 22 <7 04/15/2008 1210 +/- 131 <6 <6

  • 27 <8 04/29/2008 1170 +/- 141 <6 <7 < 27 <7 05/13/2008 1310 +/- 181 <7 <8 < 34 < 13 05/27/2008 1310 +/- 157 <5 <6 < 31 <4 06/10/2008 1190 +/- 171 <7 <8 < 29 <8 06/24/2008 1400 +/- 171 <7 <7 < 47 < 15 07/08/2008 1290 +/- 140 <6 <7 < 43 < 15 07/22/2008 1270 +/- 118 <5 <5 < 36 < 10 08/05/2008 1080 +/- 118 <5 <5 < 53 < 13 08/19/2008 1160 +/- 104 <4 <5 < 33 <8 09/02/2008 1190 +/- 146 <6 <6 < 51 .< 12 09/16/2008 1130 +/- 118 <5 <5 < 31 <7 09/30/2008 1300 +/- 51 <2 <2 < 41 < 12 10/14/2008 1170 +/- 131 <5 <6 < 35 < 12 10/28/2008 1360 +/- 51 <2 <2 < 42 < 12 11/11/2008 1190 +/- 53 <1 <1 < 52 < 12 11/25/2008 1310 +/- 80 <2 <2 < 48 < 13 12/16/2008 1090 +/- 150 <6 <8 < 32 <7 MEAN 1237 +/- 183 C-13

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION K-40 Cs-134 Cs-137 Ba-140 La-140 PERIOD 19B1 01/15/2008 1310 +/- 112 <4 <5 < 19 <6 02/12/2008 1280 +/- 151 <6 <6 < 35 <8 03/11/2008 1140 +/- 130 <5 <6 < 28 < 8 04/01/2008 1280 +/- 146 <6 < 6 < 23 <7 04/15/2008 1290 +/- 152 <6 <8 < 28 < 12 04/29/2008 1310 +/- 160 <5 <6 < 23 < 7 05/13/2008 1220 +/- 169 <7 <8 < 29 < 14 05/27/2008 1320 +/- 126 <5 <5 < 30 < 10 06/10/2008 1270 +/- 158 <5 <9 < 26 <7 06/24/2008 1320 +/- 133 <7 <6 < 41 < 13 07/08/2008 1390 +/- 129 <5 <6 < 37 <9 07/22/2008 1400 +/- 148 <5 <6 < 44 < 14 08/05/2008 1380 +/- 91 <4 <3 < 36 < 13 08/19/2008 1380 +/- 131 <6 <6 < 46 < 13 09/02/2008 1300 +/- 134 <4 <6 < 40 < 12 09/16/2008 1310 +/- 148 <7 <8 < 37 < 10 09/30/2008 1300 +/- 57 <2 <3 < 51 <-15 10/14/2008 1300 +/- 143 <5 <6 < 37 < 10 10/28/2008 1350 +/- 57 <2 <2 < 46 < 14 11/11/2008 1290 +/- 50 <1 <1 < 43 < 14 11/25/2008 1370 +/- 69 <1 <2 < 39 <11 12/16/2008 1390 +/- 149 <5 <6 < 31 <8 MEAN 1314 +/- 121 23F1 01/15/2008 1160 +/- 132 <5 <6 < 30 <7 02/12/2008 1310 +/- 130 <3 <4 < 14 <4 03/11/2008 1130 +/- 142 <6 <7 < 29 <7 04/01/2008 1130 +/- 159 <6 <8 < 26 <5 04/15/2008 1050 +/- 151 <6 <7 < 36 <9 04/29/2008 1180 +/- 153 <6 <7 < 22 <5 05/13/2008 1310 +/- 212 <6 <8 < 37 <9 05/27/2008 1320 +/- 144 <6 <7 < 38 <8 06/10/2008 1290 +/- 171 <8 <8 < 27 < 11 06/24/2008 1120 +/- 153 <7 <8 < 58 < 14 07/08/2008 1240 +/- 146 <7 <7 < 46 < 14 07/22/2008 1360 +/- 121 <5 <5 < 43 < 15 08/05/2008 1280 +/- 112 <4 <5 < 51 < 14 08/19/2008 1270 +/- 143 <5 <6 < 36 < 12 09/02/2008 1260 +/- 110 <5 <5 < 36 < 13 09/16/2008 1310 +/- 136 <6 <7 < 31 < 10 09/30/2008 1330 +/- 46 <2 <2 < 37 < 12 10/14/2008 1270 +/- 113 <5 <5 < 35 <8 10/28/2008 1340 +/- 52 <2 <2 < 49 < 15 11/11/2008 1260 +/- 44 <1 <1 < 39 < 14 11/25/2008 1210 +/- 66 <1 <2 < 36 < 12 12/16/2008 1290 +/- 156 <6 <8 < 33 <8 MEAN 1246 +/- 168 C- 14

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION K-40 Cs-134 Cs-137 Ba-140 La-140 PERIOD 25C1 01/15/2008 1340 +/- 127 <5 <6 < 28 <8 02/12/2008 1110 +/- 151 <6 <8 < 36 < 11 03/11/2008 1310 +/- 161 <7 <7 < 28 <7 04/01/2008 1280 +/- 141 <6 <7 < 24 <7 04/15/2008 1330 +/- 159 <6 <6 < 29 <8 04/29/2008 1210 +/- 139 <6 <7 < 26 <7 05/13/2008 1140 +/- 156 <7 <7 < 31 <8 05/27/2008 1430 +/- 134 <5 <6 < 35 <8 06/10/2008 1230 +/- 189 <8 <9 < 24 <7 06/24/2008 1200 +/- 127 <5 <6 < 31 < 12 07/08/2008 1160 +/- 122 <9 <9 < 45 < 14 07/22/2008 1210 +/- 107 <4 <5 < 37 < 13 08/05/2008 1330 +/- 125 <4 <5 <51 < 14 08/19/2008 1170 +/- 123 <5 <6 < 35 < 13 09/02/2008 1270 +/- 153 <5 <7 < 41 < 12 09/16/2008 1330 +/- 146 <5 <5 < 40 <7 09/30/2008 1340 +/- 52 <2 <2 < 44 < 11 10/14/2008 1460 +/- 141 <6 <6 < 40 <8 10/28/2008 1260 +/- 44 <2 <2 < 40 < 12 11/11/2008 1280 +/- 52 <1 <1 < 54 <15 11/25/2008 1450 +/- 77 <2 <2 < 40 < 12 12/16/2008 1400 +/- 158 <6 <7 < 34 < 10 MEAN 1284 +/- 199 25E1 01/15/2008 1090 +/- 120 <5 <5 < 27 <7 04/01/2008 1270 +/- 139 <5 <6 < 22 <7 07/08/2008 1300 +/- 158 <7 <7 < 39 <9 10/14/2008 1230 +/- 102 <4 <4 < 44 < 12 MEAN 1223 +/- 186 36E1 01/15/2008 1200 +/- 104 <3 <4 < 19 <7 04/01/2008 1090 +/- 114 <5 <5 < 12 <6 07/08/2008 1250 +/- 117 <5 <5 < 27 <7 10/14/2008 1260 +/- 102 <4 <5 < 45 < 14 MEAN 1200 +/- 156 -

  • THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-15

TABLE C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN BROAD LEAFY VEGETATION SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Co-60 1-131 Cs-134 Cs-137 PERIOD 11S3 06/25/2008 Cabbage 304 +/- 185 3300 +/- 444 < 20

  • 22 < 22
  • 56 < 21 < 19

'06/25/2008 Collards 245 +/- 210 4830 +/- 536 < 21

  • 20 < 19 < 57
  • 19 < 22 0612512008 Kale 217 +/- 113 4210 +/- 373 < 17 < 16 < 16 <44 < 13 <19 07/24/2008 Cabbage 170 +/- 70 2490 +/- 151 <6 <7 <6 < 52 <5 <6 07/24/2008 Collards 254 +/- 70 2530 +/- 152 <5 <6 <5 <54 <5 <5 07/2412008 Kale 234 +/- 54 2660 +/- 134 <5 <6 <5 < 50 <5 <5 08/25/2008 Cabbage < 139 2540 +/- 275 < 15 < 15 < 16 < 36 < 14 < 17 08/25/2008 Collards < 163 3390 +/- 348 <16 < 17 < 14 < 45 < 14 < 17 08/2512008 Kale 279 +/- 113 3840 +/- 330 < 15 < 17 < 18 < 45 < 14 < 15 09/15/2008 Cabbage 140 +/- 67 3160 +/- 167 <8 <9 <7 < 54 <7 <8 09/15/2008 Collards 199 +/- 68 3180 +/- 151 <6 <7 <6 < 47 <6 <7 09115/2008 Kale 196 +/- 72 3360 +/- 197 <9 < 11 <8. < 59 <7 <9 10/21/2008 Collards 209 +/- 77 4040 +/- 175 <4 <5 <3 < 59 <3 <4 10/21/2008 Kale 167 +/- 65 3790 +/- 164 <3 <5 <3 < 58 <3 <3 MEAN 218 +/- 96 3380 +/- 1408 13S3 06125/2008 Cabbage < 250 5000 +/- 514 < 23
  • 24 < 24 < 59 < 23 < 21 06/25/2008 Collards < 195 5540 +/- 420 < 20
  • 21 < 18 < 54 < 18 *21 06/25/2008 Kale < 108 4630 +/- 279 <12 < 11 < 12 < 24 < 11 < 12 07/24/2008 Cabbage 104 +/- 62 3020 +/- 162 <6 <7 <5 < 53 <5 <6 07/24/2008 Collards 724 +/- 90 7060 +/- 195 <6 <7 <6 < 58 <5 <6 07/24/2008 Kale 253 +/- 100 5070 +/- 172 <5 <5 <4 <44 <4 <5 08/25/2008 Cabbage < 100 1680 +/- 200 < 12 < 11 < 10 < 36 < 10 < 10 08/25/2008 Collards 319 +/- 110 5370 +/- 332 < 16 < 16 < 15 < 46 < 15
  • 16 08/25/2008 Kale 234 +/- 129 4870 +/- 392 *19 < 19 < 15 < 55 < 16 < 19 09/15/2008 Cabbage < 67 2270 +/- 131 <6 <7 <6 <48 <6 <6 09/15/2008 Collards < 85 3510 +/- 168 <7 <9 <8 < 55 <7 <7 09/15/2008 Kale 109 +/- 55 3320 +/- 133 <6 <7 <6 < 47 <6 <6 10/21/2008 Cabbage 207 +/- 107 4630 +/- 190 < 3 <4 S<3 < 59 <3 <3 10/21/2008 Collards 119 +/- 116 4010 +/- 177 <3 <4 <3 < 57 <3 <3 10/21/2008 Kale 90 +/- 67 4440 +/- 161 <3 <4 <3 < 59 <3 <3 MEAN 240 +/- 397 4295 +/- 2738 C-16

TABLE C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN BROAD LEAFY VEGETATION SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Co-60 1-131 Cs-1 34 Cs-1 37 PERIOD 31G1 06/25/2008 Brussel Sprout Leaves 167 +/- 108 5640 +/- 349 < 15 < 14 < 16 < 33 < 12 < 14 06/25/2008 Cabbage < 139 4200 +/- 361 < 16 < 17 < 13 < 44 < 15 < 14 06/25/2008 Lettuce 286 +/- 125 5630 +/- 383 < 17 < 17 < 15 < 36 < 14 < 16 07/24/2008 Brussel Sprout Leaves 521 +/- 95 5080 +/- 192 <7 <8 <6 < 60 <6 <7 07/24/2008 Cabbage 673 +/- 89 3950 +/- 172 <5 <5 <4 < 47 <4 <5 07/24/2008 Zucchini Leaves 1290 +/- 101 5080 +/- 195 <5 <5 <4 < 45 <4 <5 08/25/2008 Broccoli Leaves < 140 5160 +/- 374 < 15 < 17 < 15 < 49 < 13 < 17 08/25/2008 Cabbage < 118 4580 +/- 302 < 12 < 12 < 12 < 38 < 11 < 12 08/25/2008 Squash Leaves 615 +/- 162 4910 +/- 352 < 14 < 15 < 15 < 43 <13 < 14 09/15/2008 Broccoli Leaves 74 +/- 39 3350 +/- 111 <5 <6 <5 < 40 <5 <5 09/15/2008 Cabbage < 79 2400 +/- 142 <7 <8 <7 < 57 <7 <8 09/15/2008 Squash Leaves 2060 +/- 79. 5220 +/- 129 <5 <6 <5 < 43 <5 <5 10/21/2008 Broccoli Leaves 134 +/- 67 3980 +/- 157 <3 <4 <3 < 55 <2 <3 10/21/2008 Cabbage < 40 2010 +/- 120 <3 <4 <3 < 60 <3 <4 MEAN 649 +/- 1296 4371 +/- 2269

  • THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-17

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF MILLI-ROENTGEN/STD. MONTH +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S. D.

2E1 8.3 +/- 1.1 9.1 + 1.1 7.9 +/- 1.6 7.9 +/- 0.5 8.4 + 0.5 3S1 7.9 +/- 1.8 8.7 +/- 0.6 6.6 +/- 0.1 7.9 +/- 0.8 8.3 +/- 0.6 4E1 6.4 +/- 1.3 7.2 + 0.7 5.8 +/- 0.4 5.9 +/- 0.4 6.6 +/- 0.4 5H1 9.2 +/- 1.1 9.5 +/- 0.9 8.7 +/- 0.7 8.8 + 0.4 9.9 + 1.3 5S1 8.7 +/- 1.5 9.3+/- 1.1 7.6 +/- 0.5 8.6 +/- 0.2 9.1 + 0.6 6C1 7.9 +/- 1.0 8.2 +/- 0.7 7.3 +/- 0.5 7.8 +/- 0.3 8.4 +/- 0.7 7E1 8.3 +/- 1.2 9.0. +/- 0.5 7.6 +/- 0.5 8.1 +/- 0.4 8.6 +/- 0.6 7S1 8.2 +/- 1.3 8.9 +/- 0.6 7.3 +/- 0.4 8.1 +/- 0.6 8.4 +/- 0.8 9C1 7.8 +/- 1.4 8.4 +/- 0.8 6.9 +/- 0.4 7.5 +/- 0.6 8.2 +/- 0.5 10E1 8.0 +/- 2.0 9.0 +/- 0.6 7.6 +/- 0.5 6.7 +/- 0.7 8.5 +/- 0.9 10F3 7.8 +/- 1.5 8.5 +/- 0.3 7.6 +/- 1.4 6.8 +/- 0.9 8.2 +/- 0.5 10S3 7.7 + 0.7 8.1 +/- 0.7 7.2 +/- 0.4 7.7 +/- 0.6 7.8 +/- 0.6 1iSi 9.0 + 1.3 9.4 +/- 1.1 8.0 +/- 0.5 9.3 +/- 0.6 9.1 +/- 0.7 13C1 6.1 +/- 0.9 6.5 +/- 0.4 5,9 +/- 0.7 5.5 +/- 0.2 6.4 +/- 0.7 13E1 7.8 +/- 1.6 8.8 +/- 0.6 7.3 +/- 0.5 7.0 +/- 1.2 8.0 +/- 0.5 13S2 11.9 +/- 1.9 12.6 +/- 1.2 10.5. +/- 0.6 11.9 +/- 0.7 12.5 +/- 1.4 14S1 7.3 + 1.5 8.0 +/- 0.5 6.2 +/- 0.6 7.4 +/- 1.3 7.5 +/- 0.7 15D1 8.1 +/- 0.7 8.5 +/- 0.5 7.8 +/- 1.1 7.8 +/- 0.4 8.1 +/- 0.7 16F1 8.2 +/- 1.0 8.8 +/- 0.4 7.6 +/- 0.6 8.2 +/- 0.3 8.2 +/- 0.4 1781 7.7 +/- 0.9 8.1 +/- 0.6 7.3 +/- 0.9 7.4 +/- 1.0 8.1 +/- 0.2 18S2 8.6 +/- 1.3 9.2 +/- 0.4 7.8 +/- 0.8 8.4 +/- 1.2 9.0 +/- 1.1 19D1 7.4 +/- 1.3 8.3 +/- 0.9 6.8 +/- 0.4 7.2 +/- 0.3 7.1 +/- 0.4 20D1 7.3 +/-1.1 7.9 +/- 0.2 6.8 +/- 0.3 6.9 +/- 0.4 7.6 +/- 0.6 20F1 7.7 +/- 1.2 8.5 +/- 0.8 7.2 +/- 0.3 7.2 +/- 0.6 7.8 +/- 1.3 21S2 7.2 + 1.4 7.9 +/- 0.4 6.4 +/- 0.2 6.9 +/- 0.3 7.6 +/- 0.4 23S2 7.3 +/- 1.6 8.2 +/- 0.5 6.5 +/- 0.7 6.7 +/- 0.2 7.6 +/- 0.5 24D1 7.0 +/- 1.2 7.7 +/- 0.8 6.3 +/- 1.1 6.8 +/- 0.4 7.1 +/- 0.4 25D1 6.8 +/- 1.7 8.0 +/- 1.1 6.1 +/- 0.5 6.3 +/- 0.6 6.6 +/- 0.5 25S2 7.2 +/- 1.5 8.2 +/-,0.5 6.4 +/- 1.0 7.1 +/- 0'6 7.0 +/- 0.7 26S3 7.0 +/- 1.1 7.4 +/- 0.3 6.2 +/- 0.4 6.9 +/- 0.4 7.3 +/- 0.5 28D2 7.3 +/- 1.4 8.3 +/- 0.7 6.9 +/- 0.4 6.7 +/- 0.3 7.3 +/- 0.4 29E1 7.6 +/- 1.4 8.4 +/- 0.7 6.9 +/- 0.6 7.0 +/- 0.5 7.9 +/- 0.6 29S1 7.1 +/- 1.4 8.1 +/- 0.9 6.6 +/- 0.6 6.7 +/- 0.5 6.9 +/- 0.4 31D1 9.0 +/- 0.8 9.6 +/- 0.2 8.7 +/- 0.6 8.8 +/- 1.1 8.8 +/- 0.3 31D2 8.0 +/- 0.5 8.1 +/- 0.8 7.7 +/- 1.2 7.8 +/- 0.4 8.2 +/- 0.7 31S1 8.0 +/- 1.1 8.7 +/- 1.4 7.5 +/- 0.8 7.6 +/- 0.8 8.0 +/- 0.4 34E1 7.6 +/- 0.7 7.9 +/- 0.9 7.1 +/- 0.8 7.5 +/- 0.5 7.8 +/- 0.8 34S2 8.2 +/- 1.1 8.9 +/- 1.1 7.6 +/- 1.0 7.9 +/- 0.3 8.4 +/- 1.1 36D1 7.1 +/- 1.7 8.3 +/- 1.7 6.5 +/- 0.5 6.5 +/- 0.7 7.0 + 0.6 36S2 7.9 +/- 1.5 8.8 +/- 0.4 7.0 +/- 0.8 7.8 +/- 0.6 8.0 +/- 0.8 C-18

TABLE C-IX.2 MEAN QUARTERLY TLD RESULTS FOR THE SITE BOUNDARY, MIDDLE AND CONTROL LOCATIONS FOR LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF MILLI-ROENTGEN/STD. MONTH +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION SITE BOUNDARY MIDDLE CONTROL PERIOD JAN-MAR 8.8 +/- 2.3 8.3 +/- 1.3 9.5 +/- 0.0 APR-JUN 7.2 +/- 2.1 7.1 +/- 1.4 8.7 +/- 0.0 JUL-SEP 7.9 +/- 2.6 7.2 +/- 1.5 8.8 +/- 0.0 OCT-DEC 8.3 +/- 2.6 7.8 +/- 1.4 9.9 +/- 0.0 TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF MILLI-ROENTGEN/STD. MONTH LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/-2 S.D.

I SITE BOUNDARY 64 6.2 12.6 8.1 +/- 2.6 MIDDLE 92 5.5 9.6 7.6 +/- 1.7 CONTROL 4 8.7 9.9 9.2 +/- 1.1 SITE BOUNDARY STATIONS - 10S3, 11S1, 13S2,14S1, 18S2, 21S2,23S2,25S2, 26S3, 29S1, 31S1 34S2, 36S2, 3S1, 5S1, 7S1 MIDDLE STATIONS - 10E1, 10F3, 13C1, 13E1, 15D1, 16F1, 17B1, 19D1, 20D1, 20F1, 24D1, 25D1, 28D2, 29E1, 2E1, 31D1, 31D2, 34E1, 36D1, 4E1, 6C1, 7E1, 9C1 CONTROL STATIONS - 5H1 C-19

FIGURE C-1 MEAN MONTHLY TOTAL GROSS BETA CONCENTRATIONS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LGS, 1982 - 2008 12 -

12 . . .. .

10 F--:k .: .............. . . . . . .. - - - - - --.-.-.-.-. U -

0. 6 4

-rn- CONTROL  :  : ' i - .

--A--INDICATOR .  :  :

82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 Note: 2005 analysis changed from Insoluble & Soluble to Total Gross Beta YEAR LGS CRITICALITY LGS CHANGED TO TOTAL GROSS BETA AT THE BEGINNING UNIT NO. 1: 12/22/84 OF 2005. PREVIOUS DATA INCLUDED SUMMATION OF LESS UNIT NO. 2: 08/11/89 THAN VALUES.

C - 20

FIGURE C-2 MEAN ANNUAL CS-137 CONCENTRATIONS IN FISH SAMPLES COLLECTED IN THE VICINITY OF LGS, 1982 -2008 65 45 . . . . . . . . . . . . ..

35 E

2* LGS -UNIT CRITICALITY NO. 1: 12122/84 U Note: Second half of 2000 o UNIT NO. 2: 08/11/89 switched to reporting < MDC

'* 25 - . .-- . . . . .. . . .. . ... I. .... when no activity was detected. ---

Using MDC values result in a i/

larger number. LLD <150

" pCi/kg.

15---------

5 ......... . ..........

-5 . ...- -...- -...- ...

82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 YEAR CONTROL =29C1 Station 20S1 discontinued in 1995 C -21

FIGURE C-3 CONCENTRATIONS OF CS-137 IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LGS, 1982- 2008 1400 I I a a I I S a a a a I a I I a

-16B2 1200 .. . . . .. 1614 .

,,a , ,

.: LGS CRITICALITY ,

33A2 a a a UNIT NO. 1: 12/22/84 1000 *  : UNIT NO. 2: 08/11/89 . I.. . .

  • a a a CONTROL 33A2 . .. .. . .

I I I o o I lo I o o oi 800 E

"- 600 oI, ko 4o o io ot ooo o oi o oo ooe io ooo o I eoI o I o I 0) 0 I o o 1 0 1 I I o 10 0m 400

'200 1

"*-.W I I I I I I I I I I I I I I I I I I II 82 83 85 86 88 89 91 92 94 95 97 98 00 01 03 04 06 07 09 Year C - 22

FIGURE C-4 MEAN MONTHLY GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LGS, 1982 - 2008 150 1 .- - - --.-.-.-.-.-. Group I 135 . . . ...

  • Group 11
  • *.*
  • u * *
  • I
  • I -'- Group III 120------

E90 7 ...

.... . .. ......... I , r u 105 - .;-.

m 75ii, m 60U ITNO 1: 1222 4 CL 75.............. . .. . I . .

90

.... U I O.2 NO 2: 0 1 1 8 ...

'08/.. .. . . . . .

0 I , S 4 5 -.....-- --- -:..- ..--  :-  : " '-" -:...............-.".........:-

30 82 8 86

4 88

. . 90 UNT O.. .

9 22.8 4 9

.. 9 0 2 0 6 0 82 84 86 88 90 92 94 96 98 00 02 04 06 08 YEAR C-23

FIGURE C-5 MEAN WEEKLY GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LGS, 2008 50 GROUP I

--=--GROUP II 40 .- - GROUP III E30 cv S20 10

  • .l.I . I .
  • , I I l . I, Iil I . II .I . I . . Il . I . I . . I . . . . .I i i. i* iI .
  • i ! i ! i 11 I I 1 1i i * .

i . I . . I . .

I I I I 0 I I l l I I I I I. . .

I I I I I I I I i I a I . I I .

I 1

1 1

1 11 1 1 1

1 1

1 1

1 1

1 A-4.A 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 WEEK NO.

C - 24

FIGURE C-6 MEAN QUARTERLY AMBIENT GAMMA RADIATION LEVELS (TLD)

IN THE VICINITY OF LGS, 1985 - 2008 13 . . . . ... ....

-- K- SITE 12 . . . . .. . . . ,. ... 2---- INTERMEDIATE

-u CONTROL 11 -c- -- Control 51-1
9, 19 .............. . -...- - o--

8 6 1 1 . .

Si. ':i i 7 '* .. . : .; . .. .:. ... .

7 ~ ~ K~ ~ i i- - -- - -- -

6 5 . . . . . . . . . . . . .... . .'. . . .,. . . .,.....; ° .... ,....., ........ ,... ." ' " . . . .. " "

4 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 YEAR NOTE: Control Station 5H1 became the only distant location beginning in 1995 C - 25

Intentionally Left Blank C - 26

APPENDIX D DATA TABLES AND FIGURES COMPARISON LABORATORY

The following section contains data and figures illustrating the analyses performed by the quality control laboratory, Environmental Incorporated (ENV). Duplicate samples were obtained from several locations and media and split between the primary laboratory, Teledyne Brown Engineering (TBE) and ENV. Comparison of the results for most media were within expected ranges.

D-1

Intentionally Left Blank D-2

TABLE D-1.1 CONCENTRATIONS OF TOTAL GROSS BETA IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION 16C2 PERIOD 12/31/07 01/29/08 3.15 + 1.1 01/29/08 03/04/08 2.69 + 1.1 03/04/08 03/31/08 0.87 + 0.5 03/31/08 04/28/08 1.25 + 0.6 04/28/08 06/03/08 0.92 +/- 0.5 06/03/08 06/30/08 1.25 +/- 0.4 06/30/08 07/29/08 2.51 +/- 1.0 07/29/08 09/02/08 2.07 +/- 0.6 09/02/08 09/29/08 1.98 +/- 0.6 09/29/08 11/03/08 2.24 +/- 0.7 11/03/08 12/02/08 3.88 + 1.2 12/02/08 12/29/08 3.41 + 1.1 MEAN 0.8 +/- 0.6 TABLE D-I.2 CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION 16C2 PERIOD 12/31/07 03/31/08 < 180 03/31/08 06/30/08 < 149 06/30/08 09/29/08 < 145 09/29/08 12/29/08 < 173 MEAN D-3

TABLE D-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC Co LLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD 16C2 12/31/07 01/29./08 <3 <2 <5 <2 <7 <4 <4 <4 <2 <3 < 11 <2 01/29/08 03/04 /08 <3 <3 <3 <3 <6 <6 <3 <5 <3 <3 < 16 <3 03/04/08 03/31 /08 <5 <3 < 12 <5 <7 < 11 <4 <7 <5 <5 < 13 <5 03/31/08 04/28 /08 <4 <2 <9 <3 <4 <8 <3 <5 <2 <3 < 13 <5 04/28/08 06/03 /08 <7 <4 <7 <3 <8 <8 <4 <5 <3 <4 < 11 <5 06/03/08 06/30./08 <3 <3 <7 <3 <6 <5 <3 < 12 <4 <3 < 21 <6 06/30/08 07/29 /08 <3 <2 <3 <3 <5 <8 <3 <6 <3 <3 < 19 <4 07/29/08 09/02./08 <2 <1 <4 <2 <4 <3 <3 <6 <2 <2

  • 17 <3 09/02/08 09/29./08 <4 <3 <9 <2 <5 <6 <4 < 10 <5 <4 < 14 <3 09/29/08 11/03./08 <2 <3 <6 <2 <5 < 6 <3 < 12 <5 <3 < 18 <4 11/03/08 12/02./08 <2 <3 <4 <4 <4 <5 <2 <4 <3 <3 < 16 <2 12/02/08 12/29 /08 <2 <3 <7 <2 <6 <5 <3 <8 <3 <3 < 11 <4 MEAN D-4

TABLE D-11.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/-2 SIGMA COLLECTION 11 S2 PERIOD 12/31/07 - 01107108 35b+/- 5 01/07/08 - 01/14/08 17 +/- 4 01/14/08 - 01/22/07 28 +/- 4 01/22/07 - 01/28/08 33 +/-6 01/28/08 - 02/04/08 36 +/-4 02/04/08 - 02/11/08 23 +/-4 02/11/08 - 02/19/08 24 +/-4 02/19/08 - 02/25/08 24 +/-5 02/25/08 - 03/03/08 21 +/- 4 03/03/08 - 03/10/08 16 +/- 4 03/10/08 - 03/17/08 27 +/- 5 03/17/08 - 03/24/08 21 +/- 4 03/24/08 - 03/31/08 21 +/- 4 03/31/08 - 04/07/08 21 +/- 4 04/07/08 - 04/14/08 12 +/- 4 04/14/08 - 04/21/08 26 +/- 5 04/21/08 - 04/28/08 16 +/- 4 04/28/08 - 05/05/08 26 +/- 4 05/05/08 - 05/12/08 18 +/- 5 05/12/08 - 05/20/08 17 +/- 4 05/20/08 - 05/27/08 13 +/- 4 05/27/08 - 06/02/08 17 +/- 5 06/02/08 - 06/09/08 14 +/- 4 06/09/08 - 06/1 6/08 20 +/- 5 06/16/08 - 06/23/08 16 +/- 4 06/23/08 - 06/30/08 21 +/- 4 06/30/08 - 07/07/08 25 +/- 4 07/07/08 - 07/14/08 22 +/- 4 07/14/08 - 07/21/08 30 +/- 4 07/21/08 - 07/28/08 25 +/- 4 07/28/08 - 08/04/08 30 +/- 4 08/04/08 - 08/11/08 22 +/- 4 08/11/08 - 08/18/08 21 +/- 4 08/18/08 - 08/25/08 24 +/- 4 08/25/08 - 09/01/08 21 +/- 4 09/01/08 - 09/09/08 30 +/- 4 09/09/08 - 09/15/08 17 +/- 4 09/15/08 - 0 9/22/08 25 +/- 4 09/22/08 - 09/29/08 17 +/- 4 09/29/08 - 10/07/08 24 +/- 4 10/07/08 - 10/13/08 31 +/- 5 10/13/08 - 10/20/08 29 +/- 4 10/20/08 - 10/27/08 14 +/- 4 10/27/08 - 11/04/08 19 +/- 4 11/04/08 - 11/10/08 18 +/- 4 11/10/08 - 11/17/08 15 +/- 4 11/17/08 - 11/24/08 15 +/- 4 11/24/08 - 12/01/08 24 +/- 4 12/01/08 - 12/08/08 21 +/- 4 12/08/08 - 12/15/08 16 +/- 4 12/15/08 - 12/22/08 24 +/- 4 12/22/08 - 12/29/08 37 +/- 5 MEAN 22 +/- 12 D- 5

TABLE D-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER + 2 SIGMA STC COLLECTION Be-7 Mn-54 Co-58 Co-60 Cs-134 Cs-137' PERIOD 11S2 12/31/07 - 03/31/08 83 +/- 15 < 0.7 < 0.5 < 0.9 < 0.5 < 0.4 03/31/08 - 06/30/08 83 +/- 15 < 0.6 < 0.5 < 0.8 < 0.8 < 0.7 06/30/08 - 09/29/08 153 +/- 20 < 1.0 < 1.1 < 0.8 < 0.7 < 0.8 09/29/08 - 12/29/08 65 +/- 15 < 0.7 < 0.5 < 1 < 0.7 < 0.5 MEAN 96 +/- 78 --

D-6

TABLE D-I11.1 CONCENTRATIONS OF 1-131 BY CHEMICAL SEPARATION AND GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY.OF LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 PERIOD 1981 1/15/008 < 7.8 1287 +/- 104 <3 <3 10 <7 04/01/08 < 6.6 1303 +/- 115 <4 <4 18 <3 07/08/08 < 6.2 1431 +/- 106 <3 <3 13 <3 10/14/08 < 6.4 1407 +/- 113 <5 <4 17 <4 MEAN 1357 +/- 145 10F4 1/15/008 < 5.7 1350 +/- 95 <4 <3 11 <2 04/01/08

  • 6.5 1447 +/- 122 <5 <4 20 <2 07/08/08 <5 1360 +/- 115 <3 <3 14 <3 10/14/08 < 7.7 1300 +/- 124 <3 <4 23 <5 MEAN 1364 +/- 122 25C1 1/15/008 < 7.8 1262 +/- 82 <4 <2 11 <3 04/01/08 < 8.5 1348 +/- 127 <4 <3 15 <3 07/08/08 <5.1 1331 +/- 102 <4 <3 16 <3 10/14/08 < 9.6 1462 +/- 113 <5 <4 21 <3 MEAN 1351 +/- 166 D-7

FIGURE D-1 COMPARISON OF MONTHLY TOTAL GROSS BETA CONCENTRATIONS IN DRINKING WATER SAMPLES SPLIT BETWEEN ENV AND TBE, 2008 10 9 ....... -- ENV 8 .TBE 7

5 . ............................................................ ........ .T.....k ................. ".... .............

0 I I I I I I I I I I Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec MONTH D-8

FIGURE D-2 COMPARISON OF WEEKLY GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED FROM LGS COLLOCATED LOCATIONS 11S1 AND 11S2, 2008 50

-a--11S2-ENV

-- S1 -TBE 40 C) 0)

- i 4". , , . ' i ,  !

'  !* , ,4

~2 ---------------------- \- I **

, l,., '" I i, ' , " 'A " , " ,'= , ' , , , ", " d '=,',, , * l l ,' 4,; , , ' ,

1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 WEEK NO.

D-9

Intentionally Left Blank D-IO

APPENDIX E INTER-LABORATORY COMPARISON PROGRAM

TABLE E-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 A Sr-90 pCi/L 13.9 12.9 1.08 A E5848-396 Milk 1-131 pCi/L 57.3 60.0 0.96 A Ce-141 pCi/L 229 249 0.92 A Cr-51 pCi/L 336 359 0.94 A Cs-134 pCi/L 106 125 0.85 A Cs-137 pCi/L 141 146 0.97 A Co-58 pCi/L 71.8 70.8 1.01 A Mn-54 pCi/L 98.1 94.2 1.04 A Fe-59 pCi/L 102 102 1.00 A Zn-65 pCi/L 135 137 0.99 A Co-60 pCi/L 230 236 0.97 A E5850A-396 AP Ce-141 pCi 163 157 1.04 A Cr-51 pCi 233 227 1.03 A Cs-134 pCi 72.6 79.0 0.92 A Cs-137 pCi 98.3 92.0 1.07 A Co-58 pCi 46.7 44.7 1.04 A Mn-54 pCi 69.8 59.4 1.18 A Fe-59 pCi 72.2 64.5 1.12 A Zn-65 pCi 106 86.4 1.23 W Co-60 pCi 156 149 1.05 A 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 A Sr-90 pCi/L 14.4 15.8 0.91 A E5972-396 Milk 1-131 pCi/L 70.9 71.4 0.99 A Ce-141 pCi/L 157 174 0.90 A Cr-51 pCi/L 159 138 1.15 A Cs- 134 pCi/L 69.7 76.7 0.91 A Cs-137 pCi/L 115 116 0.99 A Co-58 pCi/L 59.1 61.9 0.95 A Mn-54 pCi/L 139 135 1.03 A Fe-59 pCi/L 98.4 91.7 1.07 A Zn-65 pCi/L 129 127 1.02 A Co-60 pCi/L 101 104 0.97 A E-1

TABLE E-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 E5974-396 AP Ce-141 oCi 206 207 1.00 A Cr-51 pCi 173 164 1.05 A Cs-134 pCi 95.9 91.0 1.05 A Cs-137 pCi 142.0 138.0 1.03 A Co-58 pCi 72.0 73.4 0.98 A Mn-54 pCi 180 160.0 1.13 A Fe-59 pCi 108.0 109.0 0.99 A Zn-65 pCi 159 150 1.06 A Co-60 pCi 129 124 1.04 A June 2008 E5973-396 Charcoal 1-131 pCi 73.8 84.1 0.88 A September 2008 E6284-396 Milk Sr-89 pCi/L 76.2 73.9 1.03 A Sr-90 pCi/L 12.3 11.0 1.12 A E6285-396 Milk 1-131 pCi/L 65.7 67.9 0.97 A Ce-141 pCi/L 145 161 0.90 A Cr-51 pCi/L 406 421 0.96 A Cs-134 pCi/L 196 232 0.84 A Cs-137 pCi/L 147 162 0.91 A Co-58 pCi/L 167 179 0.93 A Mn-54 pCi/L 165 166 0.99 A Fe-59 pCi/L 161 144 1.12 A Zn-65 pCi/L 305 319 0.96 A Co-60 pCi/L 218 234 0.93 A E6287-396 AP Ce-141 pCi 79.5 76.3 1.04 A Cr-51 pCi 208 199 1.05 A Cs-134 pCi 106 110 0.96 A Cs-137 pCi 79.3 76.7 1.03 A Co-58 pCi 87.7 84.4 1.04 A Mn-54 pCi 90.3 78.6 1.15 A Fe-59 pCi 81.7 68.3 1.20 A Zn-65 pCi 144 151 0.95 A Co-60 pCi 111 111 1.00 A 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)

E-2

TABLE E-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 ' E6416-396 Milk 1-131 DCi/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-134 pCi/L 117 134 0.87 A Cs-137 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 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 determined by gravimetric and/or volumetric measurements made during standardpreparation.

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

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

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

E-3

TABLE E-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 Respon, 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-1 33 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 - 73.4 A Sr-90 pCi/L 35.6 41.4 30.5 - 47.6 A Ba-133 pCi/L 25.9 25.7 20.0 - 29.5 A Cs-1 34 pCilL 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- 134 pCi/L 45.00 46.6 37.4 - 51.3 A Cs-137 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 laboratory was 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 Engineeringreported result.

(b) The ERA known value is equal to 100% of the parameterpresent in the standardas determined by 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 ControlLimits. CE=check for Error. Reported result falls within the ControlLimits and outside of the Warning Limit.

E-4

TABLE E-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-MaW 18 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 Bq/L 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-134 Bq/kg 790 854.0 598-1110 A Cs-137 Bq/kg 568 545 382-709 A Co-57 Bq/kg 424 421 295- 547 A Co-60 Bqfkg 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-RdV1 8 Vegetatior Cs-1 34 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 E-5

TABLE E-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-MaW19 Water Cs- 134 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 Bq/L 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 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-134 Bq/sample 2.46 2.6300 1.84 - 3.42 A Cs-137 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-RdV19 Vegetatior Cs- 134 Bq/sample 4.36 5.5 3.9 - 7.2 W Cs-1 37 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 evaluatedby MAPEP.

(2) Reported a statisticallyzero result.

(3) Designed to test the Safe Drinking Water screening levels. Labs reporting values 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 gravimetricand/or volumetric measurements made during standardpreparation.

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

E-6

TABLE E-4 ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2008 (Page 1 of 1)

Concentration (pCi/L)

Lab Code D Date Analysis Laboratory ERA Control Result c Result c Limits AcceItance STAP-1 143 03/24/08 Co-60 650.72 +/- 3.00 730.0 565.0 - 912.0 Pass STAP-1143 03/24/08 Cs-134 467.50 +/- 5.53 523.0 341.0 - 647.0 Pass STAP-1 143 03/24/08 Cs-137 1375.90 +/- 25.41 1450.0 1090.0 - 1900.0 Pass STAP-1 143 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 - 10.0 Pass STAP-1 143 03/24/08 Sr-90 157.60 +/- 7.70 152.0 66.9 - 236.0 Pass STAP-1 143 03/24/08 Zn-65 889.90 +/- 15.90 872.0 604.0 - 1210.0 Pass STAP-1 144 03/24/08 Gr. Beta 99.90 +/- 3.09 92.2 56.80 - 135.0 Pass STSO-1 145 03/24/08 Ac-228 1269.02 +/- 36.81 1180.0 757.0 -1660.0 Pass STSO-1 145 03/24/08 Bi-212 1407.10 +/- 56.64 1360.0 357.0 -2030.0 Pass STSO-1 145 03/24/08 Co-60 5219.70 +/- 90.30 5130.0 3730.0 -6890.0 Pass STSO-1 145 03/24/08 Cs-134 5427.30 +/- 102.94 5640.0 3630.0 -6790.0 Pass STSO-1 145 03/24/08 Cs-1 37 6346.60 +/- 201.80 6010.0 4600.0 -7810.0 Pass STSO-1 145 03/24/08 K-40 11052.70 +/- 181.80 11000.0 7980.0 -14900.0 Pass STSO-1 145 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 -10.0 Pass STSO-1 145 03/24/08 Pb-212 1198.20 +/- 96.58 1080.0 697.0 -1520.0 Pass STSO-1145 03/24/08 Pb-214 2253.30 +/- 291.60 2020.0 1210.0 -3010.0 Pass STSO- 1145 03/24/08 Sr-90 6407.00 +/- 277.00 5360.0 1940.0 -8750.0 Pass STSO-1 145 03/24/08 Th-234 2421.80 +/- 321.00 2030.0 644.0 -3870.0 Pass STSO-1145 03/24/08 Zn-65 2936.20 +/- 73.50 2660.0 2110.0 -3570.0 Pass STVE-1 146 03/24/08 Co-60 912.41 +/- 13.59 888.0 600.0 -1280.0 Pass STVE-1 146 03/24/08 Cs-134 1547.70 +/- 38.81 1540.0 882.0 -2130.0 Pass STVE-1 146 03/24/08 Cs-137 1163.80 +/- 20.62 1100.0 807.0 -1530.0 Pass STVE-1 146 03/24/08 K-40 22186.00 +/- 339.40 24600.0 17700.0 -34800.0 Pass STVE-1 146 6 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 -10.0 Pass STVE-1 146 03/24/08 Sr-90 3825.90 +/- 140.66 4130.0 2310.0 -5480.0 Pass STVE-1 146 03/24/08 Zn-65 1676.80 +/- 43.00 1430.0 1030.0 -1960.0 Pass STW-1 147 03/24/08 Co-60 1430.00 +/- 33.33 1420.0 1240.0 -1680.0 Pass

. 555.0 STW-1 147 03/24/08 Cs-134 730.18 +/- 33.39 751.0 -862.0 Pass STW-1 147 03/24/08 Cs-137 1947.80 +/- 13.80 1990.0 1690.0 -2380.0 Pass STW-1 147 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 - 10.0 Pass STW-1 147 03/24/08 Sr-90 512.03 +/- 43.37 512.0 325.0 - 684.0 Pass STW-1 147 03/24/08 Zn-65 708.90 +/- 29.00 694.0 588.0 - 865.0 Pass STW-1120 03/19/07 Zn-65 2009.00 +/- 36.40 1910.0 1600.0 - 2410.0 Pass Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

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

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

e Included in the testing series as a "false positive". No activity expected.

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TABLE E-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2008 (Page 1 of 2)

Concentration D Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STW-1137 01/01/08 Co-57 23.80 +/- 0.60 22.80 16.00 - 29.60 Pass STW-1137 01/01/08 Co-60 8.60 +/- 0.50 8.40 5.88 - 10.92 Pass STW-1137 01/01/08 Cs-134 -0.021 +/- 0.10 0.00 -1.00-1.00 Pass STW-1 137 01/01/08 Cs-137 0.00 +/- 0.10 0.00 -1.00-1.00 Pass STW-1 137 01/01/08 H-3 515.10 +/- 12.70 472.00 330.00 - 614.00 Pass STW-1137 01/01/08 Mn-54 12.90 +/- 0.80 12.10 8.50 - 15.70 Pass STW-1 137 01/01/08 Sr-90 12.00 +/- 1.50 11.40 7.98 - 14.82 Pass STW-1137 01/01/08 Zn-65 16.90 +/- 1.40 16.30 11.40 - 21.20 Pass STW-1138 01/01/08 Gr. Beta 2.30 +/- 0.15 2.43 1.22 - 3.65 Pass STAP-1139 '01/01/08 Co-57 3.90 +/- 0.07 3.55 2.49 - 4.62 Pass STAP-1139 01/01/08 Co-60 1.43 +/- 0.07 1.31 0.92-1.70 Pass STAP-1 139 01/01/08 Cs-134 2.59 +/- 0.16 2.52 1.76 - 3.28 Pass STAP-1139 01/01/08 Cs-1 37 3.05 +/- 0.12 2.70 1.89 -3.51 Pass STAP-1139 01/01/08 Mn-54 0.43 +/- 0.58 0.00 0.00 - 1.00 Pass STAP-1139 01/01/08 Sr-90 1.30 +/- 0.27 1.55 1.08 -2.01 Pass STAP-1 139 01/01/08 Zn-65 2.36 +/- 0.18 2.04 1.43 -2.65 Pass STAP-1 140 01/01/08 Gr. Beta 0.34 +/- 0.04 0.29 0.14 -0.43 Pass STVE-1 141 01/01/08 Co-57 8.30 +/- 0.18 6.89 4.82 - 8.96 Pass STVE-1 141 01/01/08 Co-60 3.03 +/- 0.13 2.77 1.94 -3.60 Pass STVE-1 141 01/01/08 Cs-134 6.53 +/- 0.29 6.28 4.40 -8.16 Pass STVE-1 141 01/01/08 Cs-137 3.90 +/- 0.19 3.41 2.39 - 4.43 Pass STVE-1 141 01/01/08 Mn-54 5.43 +/- 0.21 4.74 3.32 -6.16 Pass STVE-1 141 01/01/08 Zn-65 0.033 +/- 0.10 0.00 0.00 - 1.00 Pass STSO-1 142 01/01/08 Co-57 483.00 +/- 3.00 421.00 295.00 - 547.00 Pass STSO-1 142 01/01/08 Co-60 3.00 +/- 0.80 2.90 0.00 -5.00 Pass STSO-1 142 01/01/08 Cs-134 896.50 +/- 7.40 854.00 598.00 - 1110.00 Pass STSO-1 142 01/01/08 Cs-137 624.40 +/- 4.10 545.00 382.00 - 709.00 Pass STSO-1 142 01/01/08 Mn-54 667.20 +/- 3.80 570.00 399.00 - 741.00 Pass STSO-1 142 01/01/08 Zn-65 0.093 +/- 0.91 0.00 0.00 -1.00 Pass STSO-1 158 08/01/08 Co-57 353.02 +/- 2.01 333.00 233.00 - 433.00 Pass STSO-1 158 08/01/08 Co-60 151.99 +/- 1.58 145.00 102.00 - 189.00 Pass STSO-1 158 08/01/08 Cs-134 499.72 +/- 2.65 581.00 407.00 - 755.00 Pass STSO-1 158 08/01/08 Cs-1 37 2.54 +/- 0.25 2.80 0.00 -5.00 Pass STSO-1 158 08/01/08 K-40 643.94 +/- 15.50 570.00 399.00 - 741.00 Pass STSO-1 158 08/01/08 Mn-54 452.14 +/- 2.96 415.00 291.00 - 540.00 Pass STSO-1 158 08/01/08 Sr-90 1.95 +/- 2.04 0.00 0.00 -5.00 Pass STSO-1 158 08/01/08 Zn-65 0.10 +/- 2.04 0.00 0.00 -5.00 Pass E-8

TABLE E-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2008 (Page 2 of 2)

Concentration Known Control Lab Codec Date Analysis Laboratory result - Activity Limits d Acceptance STVE-1 159 08/01/08 Co-57 8.52 +/- 0.23 7.10 5.00 - 9.20 Pass STVE-1 159 08/01/08 Co-60 5.08 +/- 0.19 4.70 3.30 -6.10 Pass STVE-1 159 08/01/08 Cs-134 5.26 +/- 0.18 5.50 3.90 - 7.20 Pass STVE-1 159 08/01/08 Cs-137 0.01 +/- 0.14 0.00 0.00 - 1.00 Pass STVE-1 159 08/01/08 Mn-54 6.39 +/- 0.28 5.80 4.10 - 7.50 Pass STVE-1 159 08/01/08 Zn-65 7.73 +/- 0.45 6.90 4.80 - 9.00 Pass STW-1 162 08/01/08 Co-57 0.03 +/- 0.16 0.00 0.00 - 5.00 Pass STW-1162 08/01/08 Co-60 11.27 +/- 0.23 11.60 8.10 - 15.10 Pass STW-1 162 08/01/08 Cs-134 17.93 +/- 0.52 19.50 13.70 - 25.40 Pass STW-1 162 08/01/08 Cs-137 23.72 +/- 0.43 23.60 16.50 - 30.70 Pass STW-1 162 08/01/08 H-3 385.15 +/- 8.93 341.00 239.00 - 443.00 Pass STW-1 162 08/01/08 Mn-54 13.87 +/- 0.37 13.70 9.60 - 17.80 Pass STW-1 162 08/01/08 Sr-90 6.49 +/- 1.12 6.45 4.52 - 8.39 Pass STW-1 162 08/01/08 Zn-65 17.64 +/- 0.61 17.10 12.00 - 22.20 Pass STW-1163 08/01/08 Gr. Beta 0.12 +/- 0.05 0.00 0.00 - 1.85 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho b Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation),

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

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

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Intentionally Left Blank E - 10

APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Docket No: 50 - 352 50 - 353 LIMERICK GENERATING STATION UNITS I and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2008 Prepared By Teledyne Brown Engineering Environmental Services Exelin Nuclear Limerick Generating Station Sanatoga, PA 19464 April 2009

Table Of Contents~

1. Summary and Conclusions ..................................................................... I 11.Introduction...................................................................................... 2 A. Objectives of the RGPP............................................................... 2 B. Implementation of the Objectives..................................................... 2 C. Program Description................................................................... 3 D. Characteristics of Tritium (H-3)....................................................... 4 111. Program Description........................................................................... 4 A. Sample Analysis ....................................................................... 4 B. Data Interpretation..................................................................... 5 C. Background Analysis .................................................................. 6
1. Background Concentrations of Tritium ....................................... 6 IV. Results and Discussion....................................................................... 8 A. Groundwater Results .................................................................. 8 B. Surface Water Results................................................................. 9 C. Drinking Water Well Survey .................. .............................. I......... 9 D. Summary of Results - Inter-laboratory Comparison Program.................... 10 E. Leaks, Spills, and Releases ......................................................... 10 F. Trends................................................................................. 10 G. Investigations......................................................................... 10 H. Actions Taken..............................I........................................... 10 V. References..................................................................................... 11

Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations for the Limerick Generating Station, 2008 Figures Figure 1 Routine Well Water and Surface Water Sample Locations for the Radiological Groundwater Protection Program, Limerick Generating Station, 2008 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium and Stronium-90 in Well Water Samples Collected as Part of the Radiological Groundwater Protection Program, Limerick Generating Station, 2008.

Table B-1.2 Concentrations of Gamma Emitters in Well Water Samples Collected as Part of the Radiological Groundwater Protection Program, Limerick Generating Station, 2008.

Table B-II.1 Concentrations of Tritium and Stronium-90 in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Limerick Generating Station, 2008.

Table B-11.2 Concentrations of Gamma Emitters in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Limerick Generating Station, 2008.

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I. Summary and Conclusions This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Limerick Generating Station (LGS) by Exelon Nuclear covers the period 01 January 2008 through 31 December 2008. During that time period, 103 analyses were performed on 58 samples from 21 groundwater and surface water locations collected from the environment, both on and off station property in 2008.

There was one known release into the groundwater at Limerick Generating Station that occurred from a cooling tower overflow while a Radwaste discharge was in progress. The discharge was secured and no radioactivity was found in the water sample obtained.

Gamma-emitting radionuclides associated with licensed plant operations were not detected at concentrations greater than their respective Lower Limits of Detection (LLDs) as specified in the Offsite Dose Calculation Manual (ODCM) in any of the groundwater or surface water samples.

Strontium-90 was not detected at a concentration greater than the LLD of 2.0 picoCuries per liter (pCi/L) in any of the groundwater or surface water samples tested.

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. Low levels of tritium were detected at concentrations greater than the LLD of 200 pCi/L in 5 of 15 groundwater monitoring locations and I of 6 surface water monitoring locations. The tritium concentrations ranged from 208 to 902 pCi/L. Although no drinking water pathway is available from groundwater, the dose via the drinking water pathway was calculated at 0.053 mrem to a child (total body), which was 0.89% of the 10 CFR 50, Appendix I dose limit.

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

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II. Introduction The Limerick Generating Station (LGS), consisting of two 3458 MWt boiling water reactors owned and operated by Exelon Corporation, is located adjacent to the Schuylkill River in Montgomery County, Pennsylvania. Unit No. I went critical on 22 December 1984. Unit No. 2 went critical on 11 August 1989. The site is located in Piedmont countryside, transversed by numerous valleys containing small tributaries that feed into the Schuylkill River. On the eastern river bank elevation rises from approximately 110 to 300 feet mean sea level (MSL). On the western river bank elevation rises to approximately 50 feet MSL.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2008.

In 2006, Exelon instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of Limerick Generating Station. This evaluation involved numerous station personnel and contractor support personnel.

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

1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.
2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.
3. Perform routine water sampling and radiological analysis of water from selected locations.
4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.
5. Regularly assess analytical results to identify adverse trends.
6. Take necessary corrective actions to protect groundwater resources.

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

1. Exelon and its consultant identified locations as described in the 2006 Phase 1 study. The Phase 1 study results and conclusions 2

were made available to state and federal regulators as well as the public on an Exelon web site in station specific reports.

www.exeloncorp.com/ourcompanies/powerqen/nuclear/Tritium.htm

2. The Limerick Generating Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.
3. Limerick Generating Station will continue to perform routine sampling and radiological analysis of water from selected locations.
4. Limerick Generating Station has implemented new procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.
5. Limerick Generating Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description Samples for the ongoing ground water monitoring program were collected for Exelon Nuclear by Normandeau Associates, lnc.(NAI). This section describes the general collection methods used to obtain environmental samples for the LGS RGPP in 2008. Sample locations can be found in Table A-I, Appendix A.

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

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

Station personnel reviewed and evaluated.all analytical data deliverables as data were received.

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Both station personnel and an independent hydrogeologist reviewed analytical data results 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 radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the Limerick 4

Generating Station RGIPP 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 Limerick Generating Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Limerick Generating 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 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 is intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criterion for the presence of activity. All analyses were designed to achieve the required LGS detection capabilities for environmental sample analysis.

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

2. 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 5

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.

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, aquatic life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Pre-operational Radiological Environmental Monitoring Program Report, Limerick Generating Station Units 1 and 2, 1 January 1982 through 21 December 1984, Teledyne Isotopes and Radiation Management Corporation.

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

Monthly surface water sampling began in 1982, and the samples were analyzed for tritium as well as other radioactive analytes. During the preoperational program tritium was detected at a maximum concentration of 420 pCi/L, indicating that these preoperational results were from nuclear weapons testing and are radioactively decaying as predicted.

Gamma isotopic results from the preoperational program were all less than or at the minimum detectable concentration (MDC) level.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references.
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 6

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 since 1960. RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. 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 have typically been below 100 pCi/L since around 1980. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years was naturally captured in groundwater. As a result, some well water sources today are affected by the surface water from the 1960s that contained elevated tritium activity.

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c. Surface Water Data Tritium concentrations are routinely measured in the Schuylkill and Delaware Rivers. Pennsylvania surface water data are typically less than 100 pCi/L.

The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/-70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion Gamma spectroscopy results for groundwater and surface water sample were reported for twelve nuclides (Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, I-131, Cs-134, Cs-137, Ba-140 and La-140).

A. Groundwater Results Samples were collected from onsite wells throughout the year in accordance with the station radiological groundwater protection program.

Analytical results and anomalies are discussed below.

Tritium Samples from fifteen locations were analyzed for tritium activity (Table B-1.1, Appendix B). Tritium values ranged from non detectable to 902 pCi/L.

Well MW-LR-5 had the highest value of 902 pCi/L. Although no drinking water pathway is available from groundwater, the dose via the drinking water pathway was calculated at 0.053 mrem to a child (total body), which was 0.889% of the 10 CFR 50, Appendix I dose limit.

Strontium No Sr-90 activity was detected in any of the ground water samples analyzed (Table B-1.1, Appendix B).

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Gamma Emitters No gamma emitting nuclides were detected (Table B-1.2, Appendix B).

B. Surface Water Results In accordance with the Station's radiological groundwater protection program surface water samples were collected from streams that transverses the site, as well as, from other water bodies that could influence the tritium concentration at Limerick. Analytical results and anomalies are discussed below.

Tritium Samples from six locations were analyzed for tritium activity Tritium activity was detected in station SW-LR-6 at a concentration of 208 pCi/Liter (Table B-1.3, Appendix B).

Strontium No Sr-90 activity was detected in any of surface water samples analyzed (Table B-1.3, Appendix B).

Gamma Emitters Potassium-40 was detected in two of six samples. Potassium-40 values ranged from 54 pCi/Liter to 69 pCi/Liter. No other gamma emitting nuclides were detected (Table B-1.4, Appendix B).

C. Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006) around the Limerick Generating Station. CRA reviewed the Pennsylvania Groundwater Information System database to identify wells within a 1-mile radius from the center of the Station. Forty-six domestic withdrawal wells, two industrial wells, two commercial wells, and one institutional well were identified within the specified radius. The well depths range from 78 to 345 feet blow ground surface (bgs), and they yield between 8 and 100 gallons per minute (gpm). All wells are completed in the Brunswick Formation.

The Station has one potable supply well and one fire water well. The potable supply well is constructed as an open-rock borehole. Groundwater was measured at a depth 102 feet bgs during a well pump replacement in 2004 (personal communication with Station, 2006). The pump was placed at a depth of approximately 294 feet bgs. The total well depth and the depth of the steel casing are unknown. The well is located approximately 9

175 feet east of the Reactor Building. The Station estimates that the well is pumped at approximately 2 gpm. The fire water well is constructed as an open-rock borehole. Groundwater was encountered at 121 feet bgs during a well pump replacement in 2004. The well pump was placed at a depth of approximately 399 feet bgs. The total well depth and the depth of the steel casing are unknown. The well is located approximately 500 feet east of the cooling towers. The well is used only in an emergency fire situation; therefore, water use is estimated to be zero.

D. Summary of Results, - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the Annual Radiological Environmental Operating Report.

E. Leaks, Spills, and Releases There was one known release into the groundwater at Limerick Generating Station that occurred from a cooling tower overflow on March 20, 2008, while a Radwaste discharge was in progress (IR752414). The discharge was secured and no radioactivity was found in the water sample obtained; however tritium was identified in a nearby well. as part of the RGPP.

F. Trends No trends have been identified.

G. Investigations Conclusions from the Phase 1 report have been made available to state and federal regulators and to the public. Currently no investigations are on going.

H. Actions Taken

1. Compensatory Actions

-There have been no station events requiring compensatory actions at the Limerick Generating Station.

2. Installation of Monitoring Wells No new wells have been installed in 2007
3. Actions to Recover/Reverse Plumes No actions were required to recover or reverse groundwater plumes.

10

V. References

1. Conestoga Rovers and Associates, Fleetwide Assessment, Limerick Generating Station, Sanatoga, Pennsylvania, Ref. No. 045136(17), September 2006
2. Pre-operational Radiological Environmental Monitoring Program Report, Limerick Generating Station Units 1 and 2, 1 January 1982 through 21 December 1984, Teledyne Isotopes and Radiation Management Corporation.

11

Intentionally Left Blank 12

APPENDIX A LOCATION DESIGNATION

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations for the Limerick Generating Station, 2008 Location Type Distance MW-LR-1 Monitoring Well Onsite MW-LR-2 Monitoring Well Onsite MW-LR-3 Monitoring Well Onsite MW-LR-4 Monitoring Well Onsite MW-LR-5 Monitoring Well Onsite MW-LR-6 Monitoring Well Onsite MW-LR-7 Monitoring Well Onsite MW-LR-8 Monitoring Well Onsite MW-LR-9 Monitoring Well Onsite P1l Monitoring Well Onsite P14 Monitoring Well Onsite P16 Monitoring Well Onsite P17 Monitoring Well Onsite P3 Monitoring Well Onsite SP22 Monitoring Well Onsite SW-LR-2 Surface Water Offsite SW-LR-4 Surface Water Offsite SW-LR-6 Surface Water Offsite SW-LR-7 Surface Water Onsite SW-LR-8 Surface Water Onsite SW-LR-9 Surface Water Onsite A -I

/

I Mile Radius

-I NNW NNE MW-I TO NE f*,.LRA*

5~22 WNW, ENE (4

"N ft-OS>

-\. ,19 R E I-L R-20

~bLR-6S /

WSW .12 ~SE

/

/

',- ./

I; I

.4, ,;.

, X SW SSE.

7

<-A 0 500 1,000 1,500 2,000 SSW Feet S

Figure 1 Routine Well Water and Surface Water Sample Locations for the Radiological Groundwater Protection Program, Limerick Generating Station, 2008 A-2

APPENDIX B DATA TABLES

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM-90 IN WELL WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-LR-1 04/29/08 < 186 MW-LR-1 10/08/08 < 143 < 1.0 MW-LR-2 04/30/08 < 187 MW-LR-2 10/09/08 < 146 < 0.9 MW-LR-3 04/30/08 < 187 MW-LR-3 10/09/08 < 138 < 1.1 MW-LR-4 04/30/08 < 190 MW-LR-4 10/08/08 < 143 < 1.0 MW-LR-5 ORIGINAL 04/28/08 902 +/- 180 MW-LR-5 RERUN 04/28/08 832 +/- 171 MW-LR-5 ORIGINAL 04/29/08 806 +/- 171 MW-LR-5 RERUN 04/29/08 791 +/- 166 MW-LR-5 ORIGINAL 07/21/08 < 196 MW-LR-5 RERUN 07/21/08 275 +/- 110 MW-LR-5 DUPLICATE 07/21/08 366 +/- 138 MW-LR-5 ORIGINAL 08/18/08 420 +/- 133 MW-LR-5 RERUN 08/18/08 425 +/- 136 MW-LR-5 ORIGINAL 09/17/08 375 +/- 106 MW-LR-5 RERUN 09/17/08 432 +/- 106 MW-LR-5 ORIGINAL 10/09/08 167 +/- 93.6 < 1.3 MW-LR-5 DUPLICATE 10/09/08 < 147 < 0.9 MW-LR-6 04/30/08 < 190 MW-LR-6 10/09/08 < 140 < 0.9 MW-LR-7 04/30/08 < 187 MW-LR-7 10/09/08 < 144 < 0.8 MW-LR-8 ORIGINAL 04/29/08 241 +/- 124 MW-LR-8 RERUN 04/29/08 230 +/- 131 MW-LR-8 10/08/08 218 +/- 97 < 0.7 MW-LR-9 04/28/08 < 186 MW-LR-9 04/29/08 < 186 MW-LR-9 10/08/08 240 +/-. 108 < 0.9 P3 04/29/08 < 188 P3 10/09/08 < 139 < 0.7 P11 ORIGINAL 04/29/08 256 +/- 125 P11 RERUN 04/29/08 222 +/- 130 P11 ORIGINAL 10/08/08 185 +/- 94 <0.9 P11 DUPLICATE 10/08/08 197 +/- 103 < 1.6 P14 04/29/08 < 187 P14 10/08/08 212 +/- 98 < 0.8 P16 04/30/08 < 189 P16 10/09/08 < 139 P17 04/29/08 < 184 P17 10/08/08 < 136 < 1.3 SP22 04/29/08 < 186 SP22 10/08/08 < 150 < 0.9 Samples are distilled for H-3 analysis B-1

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN WELL WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LIMERICK GENERATING 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 PERIOD MW-LR-1 10/08/08 < 32 < 23 <3 <4 <8 <3 <5 <3 <6 < 19 <3 <3 < 33 < 10 MW-LR-2 10/09/08 < 34 < 28 <3 <4 <8 <3 <6 <4 <6 < 20 <3 <3 < 33 < 11 MW-LR-3 10/09/08 < 26 < 59 <2 <3 <6 <3 <5 <3 <5 < 15 <2 <3 < 27 <7 MW-LR-4 10/08/08 < 34 < 63 <3 <4 <8 <3 <6 <4 <6 < 21 <3 <3 < 35 < 12 MW-LR-5 07/21/08 < 52 <54 <6 <6 < 12 <6 < 11 <8 < 10 < 10 <5 <7 < 28 <8 MW-LR-5 10/09/08 < 35 < 32 <3 <3 <9 <3 <5 <5 <7 < 23 <3 <4 < 37 < 11 MW-LR-5 10/09/08 < 27 < 25 <2 <3 <7 <3 <5 <3 <5 < 22 <2 <3 < 30 < 10 MW-LR-6 10/09/08 < 30 < 70 <3 <4 <8 <3 <6 <4 <7 < 17 <3 <3 < 33 < 12 MW-LR-7 10/09/08 < 33 < 28 <4 <4 <8 <3 <8 <4 <7 < 19 <3 <4 < 34 < 11 MW-LR-8 10/08/08 < 39 < 32 <3 <4 <9 <4 <7 <5 <8 < 26 <3 <4 < 38 < 13 MW-LR-9 10/08/08 < 34 < 25 <3 <4 < 7 <3 <7 <4 <6 < 21 <3 <3 < 37 <9 P1l 10/08/08 <41 < 34 <3 <4 < 10 <3 <8 <5 <8 <34 <3 <4 < 51 < 15 Pl1 10/08/08 < 34 <34 <3 <4 < 7 <3 <6 <4 <7 < 19 <3 <3 < 34 < 10 P14 10/08/08 < 26 < 21 <2 <3 <7 <3 <5 <5 < 17 <2 <9

<3 <3 < 29 P-16 10/08/08 (1)

P17 10/08/08 < 34 < 57 <3 <4 <9 <3 <7 <4 <8 <29 < 3 <4 <42 < 15 P3 10/09/08 < 22 < 45 <2 <2 <5 <2 <4 <3 <4 <13 <2 <2 <24 <7 SP22 10/08/08 < 28 < 24 <3 <3 <6 <3 <6 <3 <5 <17 <3 <3 <30 < 11 (1) INSUFFICIENT VOLUME FOR GAMMA ANALYSIS B-2

TABLE B-II.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM-90 IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LIMERICK GENERATING STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 SW-LR-2 04/28/08 < 186 SW-LR-2 04/28/08 < 190 SW-LR-2 10/07/08 < 142 < 1.3 SW-LR-4 04/28/08 < 185 SW-LR-4 10/07/08 < 147 < 1.0 SW-LR-6 04/28/08 < 183 SW-LR-6 10/07/08 208 + 102 < 0.9 SW-LR-7 04/28108 < 186 SW-LR-7 10/07/08 < 131 < 1.1 SW-LR-8 04/28/08 < 186 SW-LR-8 10/09/08 < 145 < 1.0 SW-LR-9 04/28/08 < 190 SW-LR-9 10/10/08 < 166 < 1.7 SAMPLES ARE DISTILLED FOR H-3 ANALYSIS B-3

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LIMERICK GENERATING 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 PERIOD SW-LR-2 10/07/08 < 31 54+/-33 <3 <3 <8 <3 <6 <3 <6 <20 <3 <3 < 34 10 SW-LR-4 10/07t08 < 37 <60 <3 <4 <10 <3 <6 <5 <7 <23 <3 <3 < 35 12 SW-LR-6 10/07/08 < 28 69 +/-32 <3 <3 <7 <3 <5 <3 <6 <19. <2 <3 < 31 10 SW-LR-7 10/07/08 < 33 <33 <3 <4 <8 <3 <6 <4 <7 <21. <3 <4 < 38 12 SW-LR-8 10/09/08 < 34 <27 <3 <4 <7 <3 <7 <3 <6 <18 <3 <3 < 32 11 SW-LR-9 10/10/08 < 20 <29 <1 <2 <5 <1 <3 <2 <4 <54 <1 <1 < 48 14 B-4

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