ML11129A073

Independent Spent Fuel Storage Installation Annual Radiological Environmental Operating Report

ML11129A073
Person / Time
Site:	Surry, 07200002, 07200055
Issue date:	04/29/2011
From:	Stanley B Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
Download: ML11129A073 (76)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 April 29, 2011 United States Nuclear Regulatory Commission Serial No.11-218 Attention: Document Control Desk SS&L/JSA RD Washington, DC 20555-0001 Docket Nos. 50-280 50-281 72-2 72-55 License Nos. DPR-32 DPR-37 SNM-2501 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 INDEPENDENT SPENT FUEL STORAGE INSTALLATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT Surry Units 1 and 2 Technical Specification 6.6.B.2 requires the submittal of an Annual Radiological Environmental Operating Report (AREOR) for Surry Power Station. Surry Independent Spent Fuel Storage Installation (ISFSI) Technical Specification Appendix C, Item 1.3.1 requires that the Surry ISFSI be included in the environmental monitoring for Surry Power Station. Accordingly, enclosed is the Surry Power Station AREOR for the period of January 1, 2010 through December 31, 2010, which includes environmental monitoring for the Surry ISFSI.

If you have any further questions, please contact Paul Harris at 757-365-2692.

Sincerely, B. L. Stanley Director Safety & Licensing Surry Power Station Attachment Commitments made in this letter: None

Serial No.11-218 Docket Nos.: 50-280 50-281 72-2 72-55 cc: U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 Director, Nuclear Material Safety and Safeguards U. S. Nuclear Regulatory Commission Washington, D. C. 20555-0001 NRC Senior Resident Inspector Surry Power Station Director Division of Radiological Health 109 Governor Street, Room 730 Richmond, Virginia 23219

Serial No.11-218 Docket Nos.: 50-280 50-281 72-2 72-55 ATTACHMENT 1 2010 Annual Radiological Environmental Operating Report SURRY POWER STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY

Surry Power Station 2010 Annual Radiological Environmental 0 perating Report Dominion

Annual Radiological Environmental Operating Report Surry Power Station January 1, 2010 to December 31, 2010 Prepared by:

P. F. Blount Health Physicist Reviewed by:

P. R. Harris Supervisor Radiological Analysis Reviewed by:

W3Y.

A erry Lp rvisor Health Physics Technical Services Approved by:

a J.W. f-gart Manager Radiological Protection and Chemistry 2

Dominion Surry Power Station Radiological Environmental Monitoring Program January 1, 2010 to December 31, 2010

Table of Contents PREFA CE ............................................................................................................................. 4

1. EXECUTIV E SU M M ARY ........................................................................................................ 5

2. PROGRAM D ESCRIPTION ...................................................................................................... 7 2.1 Introduction ............................................................................................................................. 7 2.2 Sampling and Analysis Program ......................................................................................... 8

3. AN ALYTICAL RESU LTS ........................................................................................................ 20 3.1 Summ ary of Results ........................................................................................................ 20 3.2 Analytical Results of 2010 REM P Sam ples ................................................................... 28

4. DISCU SSION OF RESU LTS .................................................................................................. 49 4.1 Gam m a Exposure Rate ................................................................................................... 49 4.2 Airborne Gross Beta .............................................................................................................. 50 4.3 Airborne Radioiodine ....................................................................................................... 52 4.4 Air Particulate Gam m a ................................................................................................... 52 4.5 Cow M ilk .............................................................................................................................. 52 4.6 Food Products ....................................................................................................................... 53 4.7 W ell W ater ............................................................................................................................ 53 4.8 River Water ........................................................................................................................... 53 4 .9 S ilt ......................................................................................................................................... 53 4.10 Shoreline Sedim ent ........................................................................................................ 55 4.11 Fish ...................................................................................................................................... 55 4.12 Oysters ................................................................................................................................ 56 4.13 Clam s .................................................................................................................................. 56 4.14 Crabs ................................................................................................................................... 56

5. PROGRAM EX CEPTION S ...................................................................................................... 57

6. CON CLU SION S ............................................................................................................................. 58 REFEREN CES .................................................................................................................................... 60 APPEN D ICES ..................................................................................................................................... 62 APPEN D IX A : LAN D U SE CEN SU S ...................................................................................... 63 APPENDIX B:

SUMMARY

OF INTERLABORATORY COMPARISONS ........................... 65 3

PREFACE This report is submitted as required by Technical Specification 6.6.B.2, Annual Radiological Environmental Operating Report, for Surry, Units 1 and 2, Virginia Electric and Power Company Docket Nos. 50-280 and 50-281.

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1. EXECUTIVE

SUMMARY

This document is a detailed report of the 2010 Surry Power Station Radiological Environmental Monitoring Program (REMP). Radioactivity levels from January 1 through December 31, 2010, in air, water, silt, shoreline sediment, milk, aquatic biota, food products and direct exposure pathways have been analyzed, evaluated and summarized. The REMP is designed to confirm that radiological effluent releases are As Low As is Reasonably Achievable (AIARA), no undue environmental effects occur and the health and safety of the public are protected.

The program also detects any unexpected environmental processes that could allow radiation accumulations in the environment or food pathway chains.

Radiation and radioactivity in the environment are monitored within a 20-mile radius of the station. Surry Power Station personnel collect a variety of samples within this area. A number of sampling locations for each medium are selected using available meteorological, land use, and water use data. Two types of samples are obtained. The first type, control samples, is collected from areas that are beyond the measurable influence of Surry Power Station or any other nuclear facility. These samples are used as reference data. Normal background radiation levels, or radiation present due to causes other than Surry Power Station, can be compared to the environment surrounding the station. Indicator samples are the second sample type obtained. These samples show how much radiation is contributed to the environment by the station. Indicator samples are taken from areas close to the station where any station contribution will be at the highest concentration.

Prior to station operation, samples were collected and analyzed to determine the amount of radioactivity present in the area. The resulting values are used as a "pre-operational baseline." Analysis results from the indicator samples are compared to control sample values and the pre-operational baseline to determine if changes in radioactivity levels are attributable to station operations, or causes such as the Chernobyl accident or natural variation.

Teledyne Brown Engineering, Inc. provides radioanalyses for this program and Global Dosimetry Solutions, Inc. provides thermoluminescent dosimetry (TLD) services. Participation in an Interlaboratory Comparison Program provides an independent check of sample measurement precision and accuracy. Typically, radioactivity levels in the environment are so low that analysis values frequently fall below the minimum detection limits of state-of-the-art measurement methods.

Because of this, the United States Nuclear Regulatory Commission (USNRC) requires that equipment used for radiological environmental monitoring must be able to detect specified minimum Lower Limits of Detection (LLDs). This ensures that analyses are as accurate as possible. The USNRC also mandates a reporting 5

level for radionuclides. Licensed nuclear facilities must report the radionuclide activities in those environmental samples that are equal to or greater than the specified reporting level. Environmental radiation levels are sometimes referred to as a percent of the reporting level.

Analytical results are reported for all possible radiation exposure pathways to man. These pathways include airborne, aquatic, terrestrial and direct radiation exposure. The airborne exposure pathway includes radioactive airborne iodine and particulates. The 2010 airborne results were similar to previous years. No station related radioactivity was detected and natural radioactivity levels remained at levels consistent with past years' results. Aquatic exposure pathway samples include well and river water, silt and shoreline sediments, crabs, fish, clams and oysters. Naturally occurring potassium-40 was detected at average environmental levels. No man-made radionuclides were detected in well water. This trend is consistent throughout the operational environmental monitoring program. Tritium was detected in one of eight river water samples at 5.9% of the USNRC reporting level, that sample being from the discharge canal. No other man-made radionuclides were detected in river water. Silt samples indicated the presence of cesium- 137 and naturally occurring radionuclides. The cesium- 137 activity was present in the control and indicator locations and is attributable to global fallout from past nuclear weapons testing and nuclear accidents such as Chernobyl.

Shoreline sediment, which may provide a direct exposure pathway, contained no station related radionuclides. Naturally occurring potassium-40 and thorium-228 were detected at average environmental levels. The terrestrial exposure pathway includes milk and food products. Iodine-131 was not detected in any 2010 milk samples and has not been detected in milk prior to or since the 1986 Chernobyl accident. Strontium-90 was again detected in milk and this activity is attributable to past atmospheric nuclear weapons testing. No man-made radionuclides were detected in food product samples. Consistent with historical data, naturally occurring potassium-40 was detected in milk and food products. The direct exposure pathway measures environmental radiation doses using TLDs. TLD results have remained relatively constant over the years.

During 2010, as in previous years, the operation of Surry Power Station has created no adverse environmental effects or health hazards. The maximum total body dose calculated for a hypothetical individual at the station site boundary due to liquid and gaseous effluents released from the station during 2010 was 0.182 millirem. For reference, this dose may be compared to the 620 millirem average annual exposure to every person in the United States from natural and man-made sources. Natural sources in the environment provide approximately 50% of radiation exposure to man, while nuclear power contributes less than 0.1%.

These results demonstrate compliance with federal and state regulations and also demonstrate the adequacy of radioactive effluent controls at Surry Power Station.

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2. PROGRAM DESCRIPTION 2.1 Introduction This report documents the 2010 Surry Power Station operational Radiological Environmental Monitoring Program (REMP). The Dominion Surry Power Station is located on the Gravel Neck peninsula adjacent to the James River, approximately 25 miles upstream of the Chesapeake Bay. The site consists of two units, each with a pressurized water reactor (PWR) nuclear steam supply system and turbine generator furnished by Westinghouse Electric Corporation. Each unit is designed with a nominal gross electrical output of 910 megawatts electric (MWe). Unit 1 achieved commercial operation on December 22, 1972, and Unit 2 on May 1, 1973.

The United States Nuclear Regulatory Commission regulations (10CFR50.34a) require that nuclear power plants be designed, constructed and operated to keep levels of radioactive material in effluents to unrestricted areas As Low As is Reasonably Achievable. To ensure these criteria are met, the operating license for Surry Power Station includes Technical Specifications that address the release of radioactive effluents. In-plant monitoring is used to ensure that these release limits are not exceeded. As a precaution against unexpected or undefined environmental processes which might allow undue accumulation of radioactivity in the environment, a program for monitoring the station environs is also included in Surry Power Station Technical Specifications.

Dominion personnel are responsible for collecting the various indicator and control environmental samples. Global Dosimetry Solutions Incorporated is responsible for processing the TLDs. Teledyne Brown Engineering is responsible for sample analyses. The results of the analyses are used to determine if changes in radioactivity levels may be attributable to station operations. Measured values are compared with control values, which vary with time due to external events, such as cosmic ray bombardment, nuclear weapons test fallout and seasonal variations of naturally occurring radionuclides. Data collected prior to station operation is used to indicate the degree of natural variation to be expected. This pre-operational data is compared with data collected during the operational phase to assist in evaluating any radiological impact of station operation.

Occasionally, samples of environmental media may show the presence of man-made radionuclides. As a method of referencing the measured radionuclide concentrations in the sample media to a dose consequence to man, the data is compared to the reporting level concentrations listed in the USNRC Regulatory Guide 4.8, "Environmental Technical Specifications for Nuclear Power Plants",

(December, 1975) and VPAP-2103S, Offsite Dose Calculation Manual (Surry).

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These concentrations are based upon the annual dose commitment recommended by 10CFR50, Appendix I, to meet the criterion of "As Low As is Reasonably Achievable."

This report documents the results of the REMP for 2010 and satisfies the following objectives of the program:

To provide measurements of radiation and of radioactive materials in those exposure pathways and for those radionuclides that lead to the highest potential radiation exposure of the maximum exposed member of the public resulting from station operations.

To supplement the radiological effluent monitoring program by verifying that radioactive effluents are within allowable limits.

To identify changes in radioactivity in the environment.

) To verify that station operations have no detrimental effect on the health and safety of the public.

2.2 Sampling and Analysis Program Table 2-1 summarizes the 2010 sampling program for Surry Power Station. All samples listed in Table 2-1 are taken at indicator locations except those labeled "control." Dominion personnel collect all samples listed in Table 2-1.

Table 2-2 summarizes the analysis program conducted by Teledyne Brown Engineering and Global Dosimetry Solutions for Surry Power Station. All samples, with the exception of the TLDs, are shipped to Teledyne Brown Engineering, located in Knoxville, TN, for analysis. The TLDs are shipped to Global Dosimetry Solutions, located in Costa Mesa, CA, for processing.

The Surry Radiological Monitoring Locations maps (Figures 1 - 5) denote sample locations for Surry Power Station. The locations are color coded to designate sample types.

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Table 2-1 SURRY - 2010 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Onsite (Stored in a lead shield outside the protected Environmental Control (00) Quarterly area)

TLDs West North West (02) 0.2 WNW 2930 Quarterly Site Boundary Surry Station Discharge (03) 0.4 NW 3210 Quarterly Site Boundary North North West (04) 0.2 NNW 3290 Quarterly Site Boundary North (05) 0.3 N 40 Quarterly Site Boundary North North East (06) 0.3 NNE 280 Quarterly Site Boundary North East (07) 0.3 NE 440 Quarterly Site Boundary East North East (08) 0.4 ENE 670 Quarterly Site Boundary East (09) 0.3 E 890 Quarterly Site Boundary West (10) 0.1 W 2710 Quarterly Site Boundary West South West (11) 0.4 WSW 2520 Quarterly Site Boundary South West (12) 0.3 SW 2280 Quarterly Site Boundary South South West (13) 0.3 SSW 2010 Quarterly Site Boundary South (14) 0.4 S 1820 Quarterly Site Boundary South South East (15) 0.6 SSE 1570 Quarterly Site Boundary South East (16) 0.9 SE 1350 Quarterly Site Boundary Station Intake (18) 1.6 ESE 1150 Quarterly Site Boundary Hog Island Reserve (19) 2.0 NNE 260 Quarterly Near Resident Bacon's Castle (20) 4.5 SSW 2020 Quarterly Apx. 5 mile Route 633 (21) 4.9 SW 2270 Quarterly Apx. 5 mile Alliance (22) 5.1 WSW 2470 Quarterly Apx. 5 mile Surry (23) 7.7 WSW 2560 Quarterly Population Center Route 636 and 637 (24) 4.0 W 2700 Quarterly Apx. 5 mile Scotland Wharf (25) 5.0 WNW 2840 Quarterly Apx. 5 mile Jamestown (26) 6.3 NW 3080 Quarterly Apx. 5 mile Colonial Parkway (27) 3.8 NNW 3330 Quarterly Apx. 5 mile Route 617 and 618 (28) 4.9 NNW 3400 Quarterly Apx. 5 mile Kingsmill (29) 4.6 N 20 Quarterly Apx. 5 mile Williamsburg (30) 7.8 N 00 Quarterly Population Center Kingsmill North (31) 5.5 NNE 120 Quarterly Apx. 5 mile Budweiser (32) 5.8 NNE 270 Quarterly Population Center Water Plant (33) 5.0 NE 460 Quarterly Apx. 5 mile 9

Table 2-1 SURRY - 2010 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Environmental BASF (34) 5.1 ENE 700 Quarterly Apx. 5 mile TLDs Lee Hall (35) 7.1 ENE 750 Quarterly Population Center Goose Island (36) 5.1 E 900 Quarterly Apx. 5 mile Fort Eustis (37) 4.9 ESE 1040 Quarterly Apx. 5 mile Newport News (38) 19.3 SE 1300 Quarterly Population Center James River Bridge (39) 17.1 SE 1420 Quarterly Control Location Benn's Church (40) 17.0 SSE 1590 Quarterly Control Location Smithfield (41) 13.4 SSE 1670 Quarterly Control Location Rushmere (42) 5.3 SSE 1560 Quarterly Apx. 5 mile Route 628 (43) 5.1 S 1770 Quarterly Apx. 5 mile Air Charcoal Surry Station (SS) 0.3 NNE 180 Weekly Site boundary location with highest D/Q and Particulate Hog Island Reserve (HIR) 2.0 NNE 260 Weekly Bacon's Castle (BC) 4.5 SSW 2020 Weekly Alliance (ALL) 5.1 WSW 2470 Weekly Colonial Parkway (CP) 3.8 NNW 3330 Weekly BASF (BASF) 5.1 ENE 700 Weekly Fort Eustis (FE) 4.9 ESE 1040 Weekly Newport News (NN) 19.3 SE 1300 Weekly Control Location River Water Surry Station Discharge (SD) 0.4 NW 3230 Monthly Scotland Wharf (SW) 4.9 WNW 2840 Monthly Control Location Well Water Surry Station (SS) 0.1 SW 2270 Quarterly Onsite Hog Island Reserve (HIR) 2.0 NNE 280 Quarterly Construction Site (CS) 0.3 E 870 Quarterly Shoreline Hog Island Reserve (HIR) 0.6 N 70 Semi-Annually Sediment Chickahominy River (CHIC) 11.2 WNW 3010 Semi-Annually Control Location Silt Chickahominy River (CHIC) 11.2 WNW 30 0 0 Semi-Annually Control Location Surry Station Discharge (SD) 1.3 NNW 3410 Semi-Annually 10

Table 2-1 SURRY - 2010 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Milk Colonial Parkway (CP) 3.7 NNW 3360 Monthly Williams (WMS) 27.5 S 1750 Monthly Control Location Epps (EPPS) 4.8 SSW 2000 Monthly Oysters Point of Shoals (POS) 6.4 SSE 1570 Semi-Annually Mulberry Point (MP) 4.9 ESE 1240 Semi-Annually Clams Chickahommy River (CHIC) 11.2 WNW 3000 Semi-Annually Control Location Surry Station Discharge (SD) 1.3 NNW 3410 Semi-Annually Hog Island Point (HIP) 2.4 NE 520 Semi-Annually Lawne's Creek (LC) 2.4 SE 1310 Semi-Annually Jamestown Island (JI) 3.9 NNW 3240 Semi-Annually Fish Surry Station Discharge (SD) 1.3 NNW 3410 Semi-Annually Crabs Surry Station Discharge (SD) 1.3 NNW 3410 Annually Crops Brock's Farm (BROCK) 3.8 S 1830 Annually (Corn, Peanuts, Slade's Farm (SLADE) 3.2 S 1790 Annually Soybeans) 11

Table 2-2 SURRY - 2010 SAMPLE ANA LYSIS PROGRAM SAMPLEMEDIA FREQUENCY ANALYSIS LLD* REPORT UNITS Thermoluminescent Quarterly Gamma Dose 2 mR/Std. Month Dosimetry (TLD) 3 Air Iodine Weekly 1-131 0.07 pCi/mr 3

Air Particulate Weekly Gross Beta 0.01 pCi/mr 3

Quarterly (a) Gamma Isotopic pCi/m Cs-134 0.05 Cs-137 0.06 River Water Quarterly Tritium (H-3) 2000 pCi/L Composite of monthly sample Monthly 1-131 10 pCi/L Gamma Isotopic pCi/L Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 Well Water Quarterly Tritium (H-3) 2000 pCi/L 1-131 1 Gamma Isotopic pCi/L Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 Cs-134 15 Cs-137 18 Ba-140 60 La- 140 15 Footnotes located at end of table.

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Table 2-2 SURRY - 2010 SAMPLE ANALYSIS PROGRAM SAMPLEMEDIA FREQUENCY ANALYSIS LLD* REPORT UNITS Shoreline Sediment Semi-Annually Gamma Isotopic pCi/kg - dry Cs-134 150 Cs-137 180 Silt Semi-Annually Gamma Isotopic pCi/kg - dry Cs-134 150 Cs-137 180 Milk Monthly 1-131 I pCi/L Gamma Isotopic pCi/L Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 Quarterly Sr-89 NA pCi/L Composite of CP Sr-90 NA monthly sample Oysters Semi-Annually Gamma Isotopic pCi/kg - wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Clams Semi-Annually Gamma Isotopic pCi/kg - wet Mn -54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Crabs Annually Gamma Isotopic pCi/kg - wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Footnoteslocated at end of table.

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Table 2-2 SURRY- 2010 SAMPLE ANALYSIS PROGRAM S AMPLE MEDIA FREQUENCY ANALYSIS LLD* REPORT UNITS Fish Semi-Annually Gamma Isotopic pCi/kg - wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Food Products Annually Gamma Isotopic pCi/kg - wet 1-131 60 Cs-134 60 Cs-137 80 Note: This table is not a complete listing of nuclides that can be detected and reported. Other peaks that at are measurable and identifiable, together with the above nuclides, are also identified and reported.

• LLD is the Lower Limit of Detection as defined and required in the USNRC Branch Technical Position on an Acceptable Radiological Environmental Monitoring Program, Revision 1, November 1979. LLDs indicate those concentrations to which environmental samples are required to be analyzed. Actual analysis of samples may be lower than these listed values.

(a) Quarterly composites of each location's weekly air particulate samples are analyzed for gamma emitters.

NA None assigned 14

m -m m -n -n -m-m-- m -n m -m-m- -

I~.

Fiur 1. S r Raioogca

'1C,,0r

- m = m = m n m m =m= n = = = = = = =

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.ii (A URTS 2ILITA v MY ~ OENBiGH4,M YR7 ii!; A :, TJON ,'w " '0?

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,; U EL a Figure 3. Surry Emergency PRan Map

• SE TLD SamplingStations O Air Sampling Nearest Residernts MilkAnimal

• , *;i;N

,,z S *C. /*Nearest Garden Aquatic Samples 1" " . .... "i:i Original' 1991 by ADC of Alexandria, Inc., 6440 General Green Way, i* ,,'!**

...... t "* ""Alexandria, VA 2231 2...USED..WITH PERMISSION. No other reproduction may be made without the written permission of ADC.

Mm M M M M M M M M M M mM M

'for WSw (6

'I ~ ELBEWý1 t4 Figure 4. Surry Emergency Plan Map Air Sampling Stations 0 Nearest Residents IC)

TLD Sampling Nearest Milk Animal I~.I~.

Nearest Garden Crop Samples Original' 1991 by ADC of Alexandria, Inc., 6440 General Green Way, Alexandria, VA 22312. USED WITH PERMISSION. No other reproduction may be made without the written permission of ADC.

w00r

=- = M = M = MmM = =M = M M = M M Figure 5. Surry Emergency Plan Map Air Sampling Stations Nearest Residents TLD Sampling Nearest Milk Animal

• Nearest Garden Aquatic Samples Original' 1991 by ADC of Alexandria, Inc., 6440 General Green Way, Alexandria, VA 22312. USED WITH PERMISSION. No other reproduction may be made without the written permission of ADC.

....r** .'. ... i:'"!* 6%-,

3. ANALYTICAL RESULTS 3.1 Summary of Results In accordance with the Surry Offsite Dose Calculation Manual (ODCM), a summary table of the analytical results has been prepared and is presented in Table 3-1. This data is presented in accordance with the format of the USNRC Branch Technical Position, "Acceptable Radiological Environmental Monitoring Program", Revision 1, November 1979. A more detailed analysis of the data is given in Section 4.

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TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia -2010 Docket No. 50-280-281 Page 1 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Direct Gamma 164 2 3.3 (1521152) STA-41 13.4 mi 5.5 (414) 3.6 (12/12) 0 Radiation (1.1 -6.0) SSE (4.5-6.7) (1.3-6.7)

TLD (mR/

Std Month)

Air Gross 416 10 14.9 (3591364) ALL 5.1 mi 17.1 (52/52) 17.0 (51152) 0 Particulate Beta (3.8-36.1) WSW (3.8- 36.1) (6.3- 33.7)

(1E-3 pCi/m3)

Gamma 32 Be-7 32 149 (28/28) ALL 5.1 mi 171 (4/4) 151 (4/4) 0 (54.1 - 226) WSW (138 -203) (133- 173)

Cs-134 32 50 < LLD N/A < LLD < LLD 0 Cs-137 32 60 < LLD N/A < LLD < LLD 0 Air Iodine 1-131 416 70 < LLD N/A < LLD < LLD 0 (IE-3 pCi/m3)

Milk Strontium 4 (pCi/Liter)

Sr-89 4 < LLD N/A < LLD N/A 0 Sr-90 4 1.26(1/4) CP 3.7 mi 1.26 (1/4) N/A 0 (1.26- 1.26) NNW (1.26 - 1.26)

Gamma 36 K-40 36 1259 (24/24) CP 3.7 mi 1304 (12/12) 1270 (12112) 0 (1127- 1457) NNW (1168 - 1457) (1139 - 1370)

Th-228 36 12.1 (3/24) EPPS 4.8 mi 12.8 (2/24) 11.6 (1112) 0 (10.2 - 15.4) SSW (10.2-15.4) (11.6-11.6) 1-131 36 1 < LLD N/A < LLD < LLD 0 Cs-134 36 15 < LLD N/A < LLD < LLD 0 Cs-137 36 18 < LLD N/A < LLD < LLD 0 21

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2010 Docket No. 50-280-281 Page 2 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Milk Gamma 36 (pCi/Liter)

Ba-140 36 60 < LLD N/A < LLD < LLD 0 La-140 36 15 < LLD N/A < LLD < LLD 0 Food Gamma 3 Products (pCi/kg wet) K-40 3 8797 (3/3) SLADE 3.2 mi 15400 (1/1) N/A 0 (2660 - 15400) S (15400-15400)

Th-228 3 22.3 (1/3) BROCK 3.8 mi 10.4 (1/2) N/A (22.3 - 22.3) S (10.4 - 10.4) 1-131 3 60 " LLD N/A < LLD N/A 0 Cs-1 34 3 60 < LLD N/A < LLD N/A 0 Cs-1 37 3 80 < LLD N/A < LLD N/A 0 mM ............................. .................

< LLD 0 Well H-3 12 2000 < LLD N/A N/A 0 Water (pCi/Liter)

Gamma 12 K-40 12 37.5 (2/12) SS 0.1 mi 109 (1/4) N/A 0 (61.2-109) SW (109- 109)

Th-228 12 11.8 (2/12) SS 0.1 mi 11.8 (2/4) N/A 0 (7.42 - 16.2) SW (7.42 - 16.2)

Mn-54 12 15 < LLD N/A < LLD N/A 0 Co-58 12 15 < LLD N/A < LLD N/A 0 Fe-59 12 30 < LLD N/A < LLD N/A 0 Co-60 12 15 < LLD N/A < LLD N/A 0 22

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surny County, Virginia - 2010 Docket No. 50-280-281 Page 3 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean )istance Mean Mean Reported (Units) Type No. LLD Range Name D)irection Range Range Measurements Well Zn-65 12 30 " LLD N/A < LLD N/A 0 Water (pCi/Liter)

Nb-95 12 15 < LLD N/A < LLD N/A 0 Zr-95 12 30 < LLD N/A < LLD N/A 0 1-131 12 1 " LLD N/A < LLD N/A 0 Cs-134 12 15 < LLD N/A < LLD N/A 0 Cs-137 12 18 < LLD N/A < LLD N/A 0 Ba-140 12 60 < LLD N/A < LLD N/A 0 La-140 12 15 < LLD N/A < LLD N/A 0 River H-3 8 2000 1760 (1/4) SD 0.4 mi 1760 (1/4) < LLD 0 Water (1760 - 1760) NW (1760 - 1760)

(pCi/Liter)

Gamma 24 K-40 24 102.1 (9/12) SW 4.9 mi 105.6 (9/12) 105.6 (9/12) 0 (54.8- 151) WNW (35.7 - 246) (35.7 - 246)

Th-228 24 < LLD SW 4.9 mi 8.0 (2/12) 8.0 (2/12) 0 WNW (5.67 - 10.3) (5.67 - 10.3)

Ra-226 24 < LLD SW 4.9 mi 54.5(1/12) 54.5 (1/12) 0 WNW (54.5 - 54.5) (54.5 - 54.5)

Mn-54 24 15 < LLD N/A < LLD < LLD 0 Co-58 24 15 < LLD N/A < LLD < LLD 0 Fe-59 24 30 < LLD N/A < LLD < LLD 0 23

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Sully Power Station, Surry County, Virginia - 2010 Docket No. 50-280-281 Page 4 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Tota I Mean Distance Mean Mean Re ported (Units) Type No. LLD Range Name Direction Range Range Measurements River Co-60 24 15 < LLD N/A < LLD < LLD 0 Water (pCi/Liter)

Zn-65 24 30 < LLD N/A < LLD < LLD 0 Nb-95 24 15 < LLD N/A < LLD < LLD 0 Zr-95 24 30 " LLD N/A < LLD < LLD 0 1-131 24 10 < LLD N/A < LLD < LLD 0 Cs-134 24 15 < LLD N/A < LLD < LLD 0 Cs-137 24 18 < LLD N/A < LLD " LLD 0 Ba-140 24 60 < LLD N/A < LLD < LLD 0 La-140 24 15 < LLD N/A < LLD < LLD 0 Silt Gamma (pCi/kg dry)

K-40 13850 (2/2) CHIC 11.2 mi 15350 (2/2) 15350 (2/2) 0 (13600-14100) WNW (14600-16100) (14600-16100)

Cs-134 150 < LLD N/A < LLD < LLD 0 Cs- 137 180 181 (2/2) SD 1.3 mi 181 (2/2) 177 (2/2) 0 (175- 187) NNW (175-187) (152-202)

Th-228 1055 (2/2) SD 1.3 mi 1055(2/2) 1038(2/2) 0 (970- 1140) NNW (970-1140) (965-1110)

Th-232 1045 (212) SD 1.3 mi 1045(2/2) 988(2/2) 0 (1000 - 1090) NNW (1000 - 1090) (957- 1020)

Ra-226 1785 (2/2) CHIC 11.2 mi 2895(2/2) 2895 (2/2) 0 (1430 - 2140) WNW (2340 - 3450) (2340 - 3450) 24

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2010 Docket No. 50-280-281 Page 5 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean I Distance Mean Mean Reported (Units) Type No. LLD Range Name IDirection Range Range Measurements Silt Ac-228 4 < LLD CHIC 11.2 mi 434(1/2) 434(1/2) 0 (pCi/kg dry) WNW (434 - 434) (434- 434)

Shoreline Gamma 4 Sediment (pCi/kg dry) K-40 4 8245 (2/2) HIR 0.6 mi 8245 (2/2) 4010 (2/2) 0 (7070 - 9420) N (7070 - 9420) (2290 - 5730)

Cs-134 4 150 < LLD N/A < LLD < LLD 0.

Cs-137 4 180 < LLD N/A " LLD " LLD 0 Th-228 4 479 (2/2) CHIC 11.2 mi 877 (2/2) 877 (2/2) 0 (76.5- 882) WNW (523 - 1230) (523 - 1230)

Ra-226 4 929 (2/2) CHIC 11.2 mi 1035(2/2) 1035(2/2) 0 (608 - 1250) WNW (750 - 1320) (750 - 1320)

Th-232 4 765 (1/2) HIR 0.6 mi 765 (1/2) 764 (2/2) 0 (765 - 765) N (765- 765) (438- 1090)

Ac-228 4 249 (1/2) HIR 0.6 mi 249(1/2) < LLD 0 (249- 249) N (249- 249)

Fish Gamma 4 (pCi/kg -et)

K-40 4 2033 (414) SD 1.3 mi 2033(4/4) N/A 0 (692- 3290) NNW (692- 3290)

Mn-54 4 130 < LLD N/A < LLD N/A 0 Co-58 4 130 < LLD N/A < LLD N/A 0 25

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surly Power Station, Surny County, Virginia- 2010 Docket No. 50-280-281 Page 6 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Fish Fe-59 4 260 < LLD N/A < LLD N/A 0 (pCi/kg wet)

Co-60 4 130 < LLD N/A < LLD N/A 0 Zn-65 4 260 < LLD N/A < LLD N/A 0 Cs-134 4 130 < LLD N/A < LLD N/A 0 Cs-137 4 150 < LLD N/A < LLD N/A 0 Oysters Gamma 4 (pCi/kg wet)

K-40 4 886 (2/4) POS 6.4 mi 1150 (114) N/A (622-1150) SSE (1150 - 1150)

Mn-54 4 130 < LLD N/A < LLD N/A Fe-59 4 260 < LLD N/A < LLD N/A Co-58 4 130 < LLD N/A < LLD N/A Co-60 4 130 < LLD N/A < LLD N/A Zn-65 4 260 < LLD N/A < LLD N/A Cs-134 4 130 < LLD N/A < LLD N/A Cs-137 4 150 < LLD N/A < LLD N/A Clams Gamma 8 (pCi/kg wet)

K-40 8 728 (1/6) SD 1.3 mi 728 (1/6) < LLD 0 (728 - 728) NNW (728- 728)

Th-228 8 81.3 (2/6) LC 2.4 mi 81.3 (2/6) < LLD 0 (70.9 - 91.6) SE (70.9- 91.6) 26

I HTABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia -2010 Docket No. 50-280-281 Page 7 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Clams Ra-226 8 931 (1/6) JI 3.9 mi 931 (1/6) < LLD 0 (pCi/kg wet) (931 - 931) NNW (931 - 931)

Mn-54 130 < LLD N/A < LLD < LLD Co-58 130 < LLD N/A < LLD < LLD Fe-59 260 < LLD N/A < LLD < LLD Co-60 130 < LLD N/A < LLD < LLD Zn-65 260 < LLD N/A < LLD " LLD Cs-134 130 < LLD N/A < LLD < LLD Cs-137 150 < LLD N/A < LLD < LLD Crabs Gamma (pCi/kg wet)

K-40 1680 (1/1) SD 1.3 mi 1680(1/1) N/A (1680 - 1680) NNW (1680 - 1680)

Mn-54 130 < LLD N/A < LLD N/A Co-58 130 < LLD N/A < LLD N/A Fe-59 260. < LLD N/A < LLD N/A Co-60 130 < LLD N/A < LLD N/A Zn-65 260 " LLD N/A " LLD N/A Cs-134 130 < LLD N/A < LLD N/A Cs-1 37 150 < LLD N/A < LLD N/A 27

3.2 Analytical Results of 2010 REMP Samples Radiological analyses of environmental media characteristically approach and frequently fall below the detection limits of state-of-the-art measurement methods.

The reported error is two times the standard deviation (27) of the net activity.

Unless otherwise noted, the overall error (counting, sample size, chemistry, errors, etc.) is estimated to be 2 to 5 times that listed. Results are considered positive when the measured value exceeds 2y uncertainty.

Teledyne Brown Engineering analytical methods meet the Lower Limit of Detection (LLD) requirements given in Table 2 of the USNRC Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program", (November 1979, Revision 1) and the Surry ODCM.

Data are given according to sample type as indicated below.

1. Gamma Exposure Rate

2. Air Particulates, Weekly Gross Beta Radioactivity

3. Air Particulates, Weekly 1- 131

4. Air Particulates, Quarterly Gamma Spectroscopy

5. Cow Milk

6. Food Products

7. Well Water

8. River Water

9. Silt

10. Shoreline Sediment

11. Fish

12. Oysters

13. Clams

14. Crabs 28

TABLE 3-2: GAMMA EXPOSURE RATE Surry Power Station, Surry County, Virginia - 2010 mR/Std Month +/- 2 Sigma Page 1 of 1 STATION FIRST SECOND THIRD FOURTH AVERAGE NUMBER QUARTER QUARTER QUARTER QUARTER +/- 2 SIGMA 02 4.9 +/- 0.7 4.1 +/- 0.5 3.6 +/- 0.6 4.9 +/- 0.6 4.4 +/- 1.3 03 5.5 +/- 7.9 3.7 +/- 0.9 3.9 +/- 1.1 4.9 +/- 0.9 4.5 +/- 1.7 04 4.2 +/- 0.5 3.4 +/- 0.9 3.6 +/- 1.0 4.9 +/- 1.8 4.0 +/- 1.4 05 4.6 +/- 0.8 2.9 +/- 0.6 3.1 +/- 0.7 4.5 +/- 0.9 3.8 +/- 1.8 06 4.4 +/- 0.7 4.1 +/- 0.5 3.6 +/- 1.3 5.3 +/- 2.0 4.4 +/- 1.4 07 4.1 +/- 0.4 3.7 +/- 1.3 4.1 +/- 0.4 4.8 +/- 0.4 4.2 +/- 0.9 08 3.7 +/- 0.7 3.5 +/- 1.5 3.3 +/- 1.0 3.6 +/- 0.7 3.5 +/- 0.3 09 5.5 +/- 7.8 4.4 + 1.2 3.8 +/- 1.0 4.3 +/- 0.8 4.5 +/- 1.4 10 4.5 +/- 0.9 3.8 +/- 1.4 3.4 +/- 1.4 4.6 +/- 0.5 4.1 +/- 1.1 11 3.1 +/- 0.6 2.7 +/- 0.7 3.7 +/- 2.4 3.4 +/- 0.8 3.2 +/- 0.9 12 3.5 +/- 5.1 3.1 +/- 0.5 3.0 +/- 1.2 3.1 +/- 0.4 3.2 +/- 0.4 13 4.0 +/- 0.8 3.3 +/- 1.6 3.0 +/- 0.3 3.8 +/- 0.6 3.5 +/- 0.9 14 4.4 +/- 0.8 3.5 + 1.5 3.9 +/- 0.2 4.6 +/- 1.2 4.1 +/- 1.0 15 4.5 +/- 0.9 4.2 + 0.6 3.8 +/- 0.3 4.3 +/- 0.7 4.2 +/- 0.6 16 4.3 +/- 0.5 2.6 +/- 0.4 3.1 +/- 0.5 4.0 +/- 0.9 3.5 +/- 1.6 18 3.1 +/- 0.7 1.3 +/- 0.5 1.6 +/- 0.7 2.7 +/- 0.8 2.2 +/- 1.7 19 2.4 +/- 1.8 2.5 +/- 1.4 2.1 +/- 0.6 3.0 +/- 0.7 2.5 +/- 0.7 20 2.4 +/- 3.4 1.9 + 0.4 2.4 +/- 0.9 3.0 +/- 0.4 2.4 +/- 0.9 21 2.8 +/- 0.7 2.0 + 0.5 2.2 +/- 0.5 3.4 +/- 2.1 2.6 +/- 1.3 22 1.8 +/- 0.6 1.1 + 0.3 1.5 +/- 0.2 2.1 +/- 0.6 1.6 +/- 0.9 23 3.7 +/- 0.8 4.0 +/- 0.4 3.3 +/- 0.5 4.9 +/- 1.7 4.0 +/- 1.4 24 3.1 +/- 4.4 2.0 +/- 1.1 1.9 +/- 0.1 2.8 +/- 0.5 2.5 +/- 1.2 25 4.2 +/- 1.2 3.2 +/- 1.6 2.6 +/- 0.6 4.1 +/- 0.2 3.5 +/- 1.5 26 4.1 +/- 5.8 3.6 +/- 1.5 3.2 +/- 0.2 4.0 +/- 0.6 3.7 +/- 0.8 27 2.7 +/- 1.0 2.2 +/- 0.9 1.9 +/- 0.7 2.6 +/- 0.4 2.4 +/- 0.7 28 2.7 +/- 1.1 1.7 +/- 0.4 2.4 +/- 1.9 2.9 +/- 0.4 2.4 +/- 1.1 29 2.1 +/- 1.4 2.0 +/- 1.4 2.0 +/- 0.2 2.3 +/- 1.1 2.1 +/- 0.3 30 3.0 +/- 1.8 1.6 +/- 0.5 2.0 +/- 0.2 3.0 +/- 0.9 2.4 +/- 1.4 31 1.3 +/- 0.6 2.0 +/- 0.5 1.5 +/- 0.3 2.1 +/- 1.4 1.7 +/- 0.8 32 2.9 +/- 1.2 1.8 +/- 0.3 2.0 +/- 0.3 2.8 +/- 1.3 2.4 +/- 1.1 33 3.2 +/- 0.9 2.5 +/- 1.0 2.9 +/- 0.4 3.2 +/- 2.0 3.0 +/- 0.7 34 2.5 +/- 0.6 2.5 +/- 0.3 2.4 +/- 0.5 2.9 +/- 2.1 2.6 +/- 0.4 35 4.1 +/- 1.4 3.6 +/- 1.8 2.9 +/- 0.6 4.2 +/- 0.8 3.7 +/- 1.2 36 4.4 +/- 1.0 2.9 +/- 0.5 3.0 +/- 0.5 4.4 +/- 1.0 3.7 +/- 1.7 37 2.9 +/- 4.3 2.2 +/- 0.8 2.6 +/- 0.4 3.0 +/- 0.8 2.7 +/- 0.7 38 5.6 +/- 7.9 5.3 +/- 2.1 4.2 +/- 0.4 6.0 +/- 0.9 5.3 +/- 1.5 39-C 2.8 +/- 0.9 1.3 +/- 0.5 1.7 +/- 0.3 2.5 +/- 0.4 2.1 +/- 1.4 40-C 3.6 +/- 0.4 2.7 +/- 1.1 3.0 +/- 1.5 3.8 +/- 0.4 3.3 +/- 1.0 41-C 5.9 +/- 8.3 5.0 +/- 0.6 4.5 +/- 0.3 6.7 +/- 2.6 5.5 +/- 1.9 42 2.9 +/- 1.0 3.4 +/- 0.4 2.9 +/- 1.0 2.9 +/- 0.7 3.0 +/- 0.5 43 2.2 +/- 1.3 2.1 +/- 3.5 2.0 +/- 0.5 2.7 +/- 0.7 2.3 +/- 0.6 29

TABLE 3-3: GROSS BETA CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2010 1.0E-3 pCi/m3 +/- 2 Sigma Page 1 of 2 COLLECTION SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C January 05 16.6

• 2.7 12.1 +/- 2.6 14.7 +/- 2.7 16.4 2.8 10.1 +/- 2.4 14.6 +/- 2.7 15.2 +/- 2.7 12.8 +/- 2.5 January 12 13.8

• 3.3 14.5 +/- 3.4 16.6 +/- 3.5 16.7 3.5 13.3 +/- 3.2 14.2 +/- 3.3 19.7 +/- 4.3 15.7 +/- 3.5 January 19 25.2 + 3.9 19.6 +/- 3.7 22.7 +/- 3.8 24.6 4.0 20.5 +/- 3.7 25.0 +/- 3.9 25.1 +/- 4.2 26.1 +/- 3.9 January 26 16.1

• 3.4 9.8 +/- 3.2 15.4 +/- 3.5 13.9 3.4 15.0 +/- 3.4 11.5 +/- 3.2 13.2 +/- 3.3 14.5 + 3.3 February 02 20.2 +/- 3.2 13.8 +/- 2.9 22.1 +/- 3.3 21.4 3.3 19.3 +/- 3.1 18.6 +/- 3.1 16.5 +/- 3.0 16.4 +/- 3.0 February 08 12.9

• 3.9 9.5 +/- 3.9 18.0 +/- 4.2 14.3 4.1 15.0 +/- 4.0 12.0 +/- 3.9 13.4 +/- 4.0 12.2 +/- 3.9 February 16 10.9

• 2.9 9.1 +/- 2.8 10.9 +/- 3.0 12.1 3.0 12.3 +/- 2.9 11.6 +/- 2.9 12.7 +/- 3.0 13.6 + 3.0 February 23 10.5 + 2.6 11.3 +/- 2.7 9.3 +/- 2.6 10.7 2.7 11.5 +/- 2.7 10.2 +/- 2.6 10.9 +/- 2.7 10.7 + 2.7 March 02 10.6

• 2.6 7.9 +/- 2.5 9.3 +/- 2.7 9.4 2.7 8.3 +/- 2.5 9.2 +/- 2.6 8.3 +/- 2.6 7.1 + 2.4 March 09 14.1 +/- 2.8 10.9 +/- 2.7 11.9 +/- 2.8 12.4 2.8 10.6 +/- 2.6 10.5 +/- 2.6 13.0 +/- 2.8 12.1 +/- 2.8 March 16 9.6 + 2.5 11.1 +/- 2.6 14.0 +/- 2.6 10.1 2.6 9.3 +/- 2.4 9.2 +/- 2.5 9.2 +/- 2.5 11.9 +/- 2.5 March 24 12.4 +/- 2.6 9.9 +/- 2.5 13.6 +/- 2.7 13.2 2.7 12.1 +/- 2.6 12.1 +/- 2.6 14.1 +/- 2.7 14.1 +/- 2.8 March 30 9.8

• 3.8 11.2 +/- 3.9 11.1 +/- 4.0 9.3 3.9 10.1 +/- 3.8 12.8 +/- 3.9 -2.1 +/- 3.2 8.6 +/- 3.7 Qtr. Avg. +/- 2 sd. 14.0 +/- 9.1 11.6 +/- 6.0 14.6 +/- 8.7 14.2 +/- 9.2 12.9 +/- 7.4 13.2 +/- 8.7 14.3 +/- 9.2 13.5 +/- 9.2 April 06 7.7 +/- 3.2 7.3 +/- 3.2 11.0 +/- 3.4 9.5 3.3 9.4 +/- 3.2 7.6 +/- 3.2 8.9 +/- 3.3 8.8 +/- 3.2 April 13 14.7 + 2.9 13.9 +/- 2.9 14.0 +/- 2.9 17.1 3.1 13.5 +/- 2.9 16.1 +/- 3.0 16.9 +/- 3.0 13.0 +/- 2.8 April 20 13.6 + 3.4 14.2 +/- 3.5 10.8 +/- 3.4 15.9 3.6 16.2 +/- 3.6 14.6 +/- 3.5 17.2 +/- 3.6 15.3 + 3.5 April 27 18.1 +/- 3.6 14.6 +/- 3.5 16.4 +/- 3.5 19.4 3.7 16.5 +/- 3.5 10.6 +/- 3.2 15.7 +/- 3.5 17.3 +/- 3.5 May 04 9.3 +/- 3.6 6.6 +/- 3.6 8.1 +/- 3.6 9.5 3.7 9.8 +/- 3.7 9.1 +/- 3.6 10.1 +/- 3.7 4.5 + 3.4 May 11 19.9 +/- 3.6 15.2 +/- 3.5 13.7 +/- 3.4 17.4 3.6 19.9 +/- 3.7 13.7 +/- 3.4 19.1 +/- 3.6 13.3 +/- 3.3 May 18 11.8 +/- 2.7 10.6 +/- 2.7 10.9 +/- 2.7 13.5 2.9 11.5 +/- 2.7 8.8 +/- 2.5 9.4 +/- 2.6 8.9 +/- 2.6 May 25 9.2 +/- 3.0 11.1 _ 3.1 10.7 +/- 3.2 8.5 3.1 9.0 +/- 3.1 5.9 +/- 2.9 10.7 +/- 3.2 6.3 +/- 2.9 June 01 13.2 +/- 3.1 14.4 _ 3.2 14.3 +/- 3.1 15.5 3.2 14.8 +/- 3.1 13.3 +/- 3.0 13.6 +/- 3.1 14.9 +/- 3.1 June 08 14.1 +/- 3.3 11.5 _ 3.3 12.4 +/- 3.3 12.5 3.3 14.5 +/- 3.4 10.7 +/- 3.2 12.1 +/- 3.3 10.4 + 3.1 June 15 14.5 +/- 3.5 11.9 _ 3.5 14.3 +/- 3.6 11.9 3.5 11.1 +/- 3.4 10.8 +/- 3.3 13.3 +/- 3.5 11.6 + 3.4 June 22 15.6 +/- 3.4 14.7 _ 3.5 12.5 +/- 3.4 13.9 3.5 13.6 +/- 3.4 11.1 +/- 3.3 15.9 +/- 3.5 12.1 + 3.3 June 29 16.7 +/- 3.3 16.4 _ 3.4 17.7 +/- 3.4 19.9 3.6 19.0 +/- 3.5 17.5 +/- 3.4 -1.7 +/- 2.4 19.1 + 3.4 Qtr. Avg. +/- 2 sd. 13.7 +/- 7.1 12.5 +/- 6.0 12.8 +/- 5.2 14.2 +/- 7.5 13.8 +/- 7.1 11.5 +/- 6.7 13.6 +/- 6.8 12.6 +/- 8.4 30

TABLE 3-3: GROSS BETA CONCENTRA TION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2010 1.0E-3 pCi/m3 +/- 2 Sigma Page 2 of`2 COLLECTION SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C July 06 16.0 3.4 7.9 3.1 14.4 3.4 13.8 3.4 10.5 3.2 8.8 +/- 3.0 8.8 +3.1 9.2 +/- 3.0 July 13 23.3 3.6 19.0 3.5 18.5 3.5 22.2 3.7 23.3 3.7 18.7 +/- 3.5 16.6 +3.4 21.6 +/- 3.6 July 20 18.9 3.4 14.1 3.3 14.4 3.3 19.2 3.5 18.6 3.4 14.0 +/- 3.2 18.4 +3.4 15.7 +/- 3.3 July 27 17.2 3.6 15.7 3.6 0.5 2.8 18.1 3.7 15.3 3.5 10.8 +/- 3.3 14.7 +3.5 16.2 +/- 3.5 August 03 11.1 3.0 13.0 3.1 12.5 3.1 7.3 2.8 11.8 3.0 9.6 +/- 2.9 9.3 +2.9 13.9 +/- 3.1 August 09 19.3 4.1 15.9 3.9 18.7 3.9 11.0 3.9 17.7 3.9 25.5 +/- 4.1 18.3 +3.8 23.9 +/- 4.1 August 17 19.0 3.3 15.0 3.1 15.1 3.1 10.6 2.8 16.7 3.2 18.5 +/- 3.2 15.4 +3.0 20.6 +/- 3.3 August 24 18.1 3.7 12.0 3.4 20.7 3.8 9.7 3.3 20.0 3.8 18.0 +/- 3.7 12.1 + 3.4 18.8 +/- 3.7 August 31 14.7 3.1 12.9 3.0 17.6 3.7 23.1 3.5 20.5 3.4 14.0 +/- 3.1 14.4 +3.1 19.3 +/- 3.3 September 07 25.0 3.7 21.3 3.5 30.7 4.0 34.4 4.0 21.5 3.5 27.1 +/- 3.7 22.4 +3.5 31.5 +/- 3.9 September 14 17.3 3.2 13.4 3.0 15.4 3.2 21.3 3.3 13.4 3.0 16.5 +/- 3.2 22.9 +/-3.4 20.5 +/- 3.4 September 21 10.5 2.9 24.1 3.6 11.8 3.0 30.7 3.8 26.5 3.7 22.3 +/- 3.5 20.6 +3.4 30.0 +/- 3.9 September 28 8.3 2.9 24.1 3.7 10.4 3.0 32.2 4.0 22.9 3.6 27.9 +/- 3.8 18.8 +/- 3.4 27.0 +/- 3.8 Qtr. Avg. +/- 2 s.d. 16.8 +/- 9.6 16.0 +/- 9.7 16.7 +/- 13.6 19.5 +/- 17.9 18.4 +/- 9.5 17.8 +/- 12.9 16.4 +/- 9.0 20.6 +/- 12.7 October 05 3.3 + 2.6 6.6 + 2.8 5.7 + 2.7 8.1 + 2.8 10.2 3.0 8.8 +/- 2.9 7.1 +/-2.8 8.5 +/- 2.8 October 12 7.4 + 2.7 24.5 + 3.6 13.7 + 3.0 30.3 +/- 3.8 25.0 3.6 27.7 +/- 3.7 20.4 +/-3.3 29.0 +/- 3.7 October 18 8.6 + 3.1 23.4 +/- 3.9 11.2 + 3.2 34.3 +/- 4.3 23.2 3.9 27.3 +/- 4.0 22.2 +/-3.8 31.3 +/- 4.2 October 26 8.5 2.6 18.8 3.1 10.7 + 2.7 24.1 +/- 3.3 22.7 3.3 21.9 +/- 3.2 18.6 +/-3.1 26.7 +/- 3.4

-+

November 02 4.5 2.6 12.0 +/- 3.0 7.3 + 2.7 17.1 3.2 10.9 +/- 3.0 14.3 +/- 3.1 11.7 +/-3.0 15.7 +/- 3.2 November 09 3.2 +/- 2.3 10.3 -+ 2.8 4.8 + 2.4 12.1 +/- 2.8 12.4 + 2.9 10.2 +/- 2.7 9.1 +/-2.6 14.9 +/- 3.0 November 16 6.9 +/- 2.7 11.3 +/- 3.0 7.5 + 2.7 17.9 + 3.2 13.4 3.1 15.3 +/- 3.1 13.4 +/-3.0 21.6 +/- 3.4 November 23 11.0 2.5 28.1 +/- 3.5 26.5 + 3.3 36.1 + 3.7 28.0 +/- 3.4 30.7 +/- 3.5 24.7 +/- 3.2 33.7 +/- 3.6 November 30 6.8 2.6 13.3 3.1 15.4 + 3.1 16.6 +/- 3.1 15.1 3.1 15.4 +/- 3.1 14.3 +3.0 16.7 +/- 3.1

+ +/-

+/-

December 07 5.5 2.6 15.0 +/- 3.1 16.8 + 3.2 21.7 +/- 3.4 16.1 3.2 15.4 +/- 3.1 21.1 +/-3.7 21.1 +/- 3.4 December 14 5.1 2.5 14.4 +/- 3.2 18.5 + 3.3 19.5 +/- 3.3 18.4 -+

3.3 15.4 +/- 3.2 18.5 +/-3.7 22.0 +/- 3.6 December 21 8.2 +/- 2.9 16.8 3.3 20.8 +/- 3.4 26.8 .+ 3.7 22.1 +/-

3.5 24.5 +/- 3.6 17.7 +/-3.3 22.9 +/- 3.6

+/-

December 29 5.4 +/- 1.7 7.1 1.8 6.7 + 1.8 3.8 +/- 1.5 6.3 1.8 4.7 +/- 1.6 7.4 +/-1.8 6.4 +/- 1.8 Qtr. Avg. + 2 s.d. 7.1 +/- 4.6 15.5 +/- 13.2 12.7 +/- 13.2 20.6 +/- 19.3 17.2 +/- 13.2 17.8 +/- 15.9 15.9 +/- 11.6 20.8 +/- 16.6 Ann. Avg. + 2 s.d, 13.1 +/- 10.4 13.9 +/- 9.8 14.2 +/- 10.1 17.1 +/- 15.3 15.6 +/- 10.4 15.1 t 12.6 15.1 +/- 9.4 17.0 t 14.0 31

TABLE 3-4: IODINE-131 CONCENTRATION IN FILTERED AIR Surry Power Station, Surny County, Virginia - 2010 1.0E-3 pCi/m3 +/- 2 Sigma Page I of 2 COLLECTIONI SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C January 05 2.5 +/- 17.3 2.6 +/- 17.8 2.6 +/- 18.0 2.6 +/- 17.9 -10.3 +/- 22.9 -10.5 +/- 23.2 -10.5 +/- 23.3 -10.3 +/- 22.9 January 12 -9.8 +/- 18.2 -10.1 +/- 18.7 -10.1 +/- 18.8 -10.0 +/- 18.6 6.2 +/- 27.1 6.2 +/- 27.4 7.9 +/- 34.7 6.4 +/- 28.0 January 19 -5.3 +/- 7.6 -9.9 +/- 14.1 -9.8 +/- 14.0 -9.9 +/- 14.2 -9.5 +/- 8.7 -17.4 +/- 15.9 -19.2 +/- 17.6 -17.3 +/- 15.9 January 26 -14.3 +/- 19.6 -14.6 +/- 20.1 -14.6 +/- 20.1 -14.7 +/- 20.3 25.4 +/- 17.5 25.7 +/- 17.7 25.7 +/- 17.8 25.1 +/- 17.3 February 02 9.1 +/- 14.0 9.4 +/- 14.4 9.4 +/- 14.4 9.4 +/- 14.4 -10.5 +/- 17.8 -10.6 +/- 18.0 -10.6 +/- 17.9 -10.6 +/- 18.0 February 08 -3.4 +/- 9.8 -3.5 +/- 10.1 -3.5 +/- 10.0 -3.5 +/- 10.1 0.3 +/- 7.7 0.3 +/- 7.8 0.3 +/- 7.8 0.3 +/- 7.8 February 16 0.3 +/- 4.4 0.3 +/- 4.6 0.3 +/- 4.6 0.3 +/- 4.6 -1.1 +/- 5.8 -1.1 +/- 5.9 -1.1 +/- 5.9 -1.1 +/- 5.9 February 23 2.2 +/- 13.2 2.3 +/- 13.6 2.3 +/- 13.6 2.3 +/- 13.6 4.2 +/- 11.8 4.2 +/- 11.8 4.2 +/- 12.0 4.2 +/- 11.9 March 02 0.1 +/- 3.1 0.1 +/- 3.2 0.1 +/- 3.2 0.1 +/- 3.2 -0.3 +/- 4.1 -0.3 +/- 4.1 -0.3 +/- 4.1 -0.3 +/- 4.0 March 09 14.1 +/- 12.4 14.6 +/- 12.8 14.8 +/- 12.9 14.6 +/- 12.8 -5.2 +/- 13.9 -5.2 +/- 14.0 -5.3 +/- 14.1 -5.3 +/- 14.1 March 16 -2.7 +/- 4.8 -2.8 +/- 4.9 -2.8 +/- 4.9 -2.8 +/- 5.0 3.5 +/- 8.0 3.5 +/- 8.1 3.5 +/- 8.1 3.5 +/- 8.0 March 24 1.7 +/- 14.2 1.7 +/- 14.4 1.7 +/- 14.6 1.7 +/- 14.5 1.1 +/- 16.0 1.1 +/- 16.0 1.1 +/- 16.2 1.1 +/- 16.5 March 30 -7.8 +/- 17.2 -7.9 +/- 17.3 -8.0 +/- 17.5 -8.0 +/- 17.4 -9.4 +/- 15.0 -9.4 +/- 15.0 -9.5 +/- 15.1 -9.4 +/- 14.9 April 06 -2.5 +/- 11.7 -2.5 +/- 11.8 -2.5 +/- 11.8 -2.5 +/- 11.8 -5.5 +/- 15.2 -5.6 +/- 15.3 -5.6 +/- 15.5 -5.4 +/- 14.9 April 13 -3.9 +/- 9.2 -3.9 +/- 9.3 -3.9 +/- 9.3 -3.9 +/- 9.3 -20.7 +/- 14.5 -20.4 +/- 14.2 -20.5 +/- 14.4 -20.4 +/- 14.3 April 20 -8.6 +/- 12.7 -8.6 +/- 12.8 -8.8 +/- 13.1 -8.7 +/- 13.0 -3.0 +/- 6.7 -2.9 +/- 6.6 -2.9 +/- 6.5 -2.9 +/- 6.6 April 27 -2.6 +/- 7.8 -2.6 +/- 8.0 -2.6 +/- 8.0 -2.6 +/- 8.1 7.2 +/- 12.6 7.1 +/- 12.5 7.1 +/- 12.4 7.0 +/- 12.2 May 04 -4.3 +/- 11.3 -4.4 +/- 11.6 -4.4 +/- 11.6 -4.4 + 11.7 -7.4 +/- 16.1 -7.2 +/- 15.9 -7.4 +/- 16.2 -7.2 +/- 15.8 May 11 5.7 +/- 10.5 5.8 +/- 10.7 5.8 +/- 10.7 5.9 + 10.9 0.2 +/- 15.1 0.2 +/- 14.9 0.2 +/- 15.2 0.2 +/- 14.8 May 18 2.9 +/- 10.2 3.0 +/- 10.3 3.0 +/- 10.3 3.0 + 10.4 4.0 +/- 14.4 3.9 +/- 14.0 4.0 +/- 14.3 3.9 +/- 14.0 May 25 -1.5 +/- 16.7 -1.5 +/- 16.9 -1.6 +/- 17.7 -1.6 + 18.0 -5.6 +/- 24.3 -5.5 +/- 24.0 -5.6 +/- 24.3 -5.5 +/- 23.8 June 01 -0.4 + 25.1 -0.4 +/- 25.9 -0.4 +/- 25.1 -0.4 + 25.4 11.7 +/- 27.1 11.7 + 27.0 11.8 +/- 27.3 11.5 +/- 26.6 June 08 -7.5 +/- 13.6 -7.8 +/- 14.0 -7.7 +/- 13.9 -7.8 + 14.0 -2.8 +/- 19.0 -2.7 + 18.8 -2.8 +/- 19.1 -2.7 +/- 18.6 June 15 11.1 +/- 10.6 11.4 +/- 10.9 11.4 +/- 10.9 11.4 + 10.9 -1.0 +/- 15.7 -0.9 + 15.4 -1.0 +/- 15.6 -0.9 +/- 15.2 June 22 -1.5 +/- 8.1 -1.5 + 8.3 -1.5 + 8.3 -1.5 + 8.4 2.2 +/- 9.1 2.1 + +/-

8.9 2.2 9.1 2.1 +/- 8.9 June 29 -4.4 +/- 15.5 -4.5 + 16.0 -4.5+ 15.8 -4.5+ 16.1 11.1 +/- 15.5 11.0 + +/-

15.3 10.9 15.3 10.9 +/- 15.2 32

TABLE 3-4: IODINE-131 CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2010 1.0E-3 pCi/m3 +/- 2 Sigma Page 2 of 2 COLLECTION I SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C July 06 -1.3 +/- 3.2 -2.8 +/- 6.8 -1.3 +/- 3.2 -1.3 +/- 3.3 -0.7 +/- 3.6 -0.7 +/- 3.5 -0.7 +/- 3.6 -0.7 +/- 3.5 July 13 -2.3 +/- 7.4 -2.3 +/- 7.6 -2.3 +/- 7.6 -2.3 +/- 7.6 1.6 +/- 10.3 1.5 +/- 10.2 1.6 +/- 10.4 1.5 +/- 10.1 July 20 -1.6 + 9.1 -1.7 + 9.3 -1.7 +/- 9.3 -1.7 +/- 9.4 1.3 +/- 11.2 1.3 +/- 11.0 1.3 +/- 11.2 1.3 +/- 11.1 July 27 12.8 +/- 9.9 13.0 + 10.1 12.8 +/- 9.9 13.2 +/- 10.2 5.6 +/- 12.2 5.5 +/- 11.9 5.5 +/- 12.1 5.4 +/- 11.8 August 03 -4.1 + 17.2 -4.1 + 17.1 -4.1 +/- 17.1 -4.0 _+16.7 11.0 + 17.1 11.0 17.0 11.1 + 17.2 10.7 +/- 16.7

+

+ + +

August 09 5.4 12.5 5.4+ 12.5 5.1 +/- 11.8 5.8 13.4 -0.2 18.2 -0.2 17.7 -0.2 + 17.6 -0.2 +/- 17.7

+ + +

August 17 -15.8 15.4 -15.8 + 15.4 -15.8 +/- 15.5 -15.4 15.1 -2.6 16.3 -2.5 + 15.9 -2.5 +/- 15.9 -2.5 +/- 15.9

+ + +

August 24 2.9 14.8 2.9+ 14.8 2.9 +/- 14.8 2.8 14.6 1.2 19.6 1.2 "+ 19.1 1.2 +/- 19.1 1.2 +/- 19.0

+ + +

August 31 5.2 11.2 5.2 + 11.2 6.0 +/- 13.0 5.0 10.9 0.7 15.6 0.7 15.2 0.7+ 15.1 0.7 +/- 15.3 September 07 -3.8 +/- 9.1 -3.8 +/- 9.1 -4.0 +/- 9.5 -3.7 +/- 8.9 -1.3 + 6.5 -1.3 +/- 6.4 -1.3 +/- 6.3 -1.3 +/- 6.3 September 14 -2.8 +/- 12.7 -2.8 +/- 12.7 -2.9 +/- 13.0 -2.8 +/- 12.5 -2.1 + 17.4 -2.1 +/- 17.4 -2.1 +/- 17.1 -2.1 +/- 1.7 September 21 -2.4 +/- 12.7 -2.4 +/- 13.0 -2.4 +/- 12.7 -2.4 +/- 12.7 -5.9 + 8.8 -5.8 +/- 8.6 -5.8 +/- 8.6 -5.8 +/- 8.7 September 28 3.4 +/- 8.6 3.4 +/- 8.8 3.4 +/- 8.6 3.4 +/- 8.6 0.8+ 10.8 0.8 +/- 10.7 0.8 +/- 10.7 0.8 +/- 10.7 October 05 9.0 .+ 16.5 9.3 +/- 16.9 8.9 +/- 16.3 8.9 + 16.2 -4.3+ 26.0 -4.3 +/- 25.7 -4.3 25.6 -4.2 +/- 25.4

+

+/- + +/- +/-

October 12 5.7 11.2 5.9 11.5 5.7 +/- 11.2 5.7 11.2 -0.11 18.5 -0.1 18.2 -0.1 +/- 18.2 -0.1 18.1

+ +/- +/-

October 18 -5.6 + 18.6 -5.7 +/- 19.1 -5.6 +/- 18.6. -5.6 18.6 3.6 + 15.1 3.5 14.9 3.5+/- 14.9 3.5 14.8

+ +/- +/-

October 26 -13.8 19.9 -14.1 +/- 20.3 -13.8 +/- 19.8 -13.7 19.8 1.4 20.5 1.4 20.3 1.4 + 20.2 1.4 20.1 November 02 11.5 +/- 26.2 11.8 +/- 26.9 11.5 +/- 26.2 11.5 +/- 26.2 -1.3 + 40.1 -1.3 +/- 39.9 -1.3 + 39.9 -1.3 +/- 39.9 November 09 1.8 +/- 16.0 1.9 +/- 16.6 1.8 +/- 16.0 1.8 +/- 16.0 0.5+ 20.7 0.4 +/- 20.6 0.4+/- 20.2 0.4 +/- 20.3 November 16 -10.0 +/- 15.3 -10.3 +/- 15.8 -10.0 +/- 15.3 -9.9 +/- 15.2 9.3+ 15.1 9.2 +/- 14.9 9.1+/- 14.7 9.2 +/- 14.9 November 23 -11.3 +/- 17.3 -11.7 +/- 17.9 -11.4 +/- 17.5 -11.3 +/- 17.3 10.1 + 29.6 10.0 +/- 29.4 9.8 + 28.9 9.9 +/- 29.1 November 30 -6.8 +/- 11.6 -7.1 +/- 12.0 -7.0 +/- 11.7 -6.8 +/- 11.6 6.7+ 19.4 6.6 +/- 19.2 6.5+ 19.0 6.6 +/- 19.1 December 07 13.4 + 15.3 13.8 +/- 15.8 13.6 +/- 15.5 13.4 +/- 15.2 -6.7 + 15.5 -6.1 +/- 15.3 -6.8 +/- 17.1 -6.0 +/- 15.2 December 14 -6.8 + 16.0 -7.2 +/- 17.1 -7.2 +/- 16.9 -7.1 +/- 16.7 4.6 + 23.5 4.5 +/- 23.2 5.3 +/- 27.1 4.7 +/- 24.2 December 21 -21.9 + 34.1 -22.1 +/- 34.4 -21.6 +/- 33.6 -21.3 +/- 33.1 -0.4 + 33.9 -0.4 +/- 33.2 m0.4 +/- 33.1 -0.4 +/- 34.4 December 29 0.1 + 13.3 0.1 +/- 13.6 0.1 +/- 13.6 0.1 +/- 13.4 -3.7 + 19.2 -3.7 +/- 19.1 -3.7 +/- 19.2 -3.8 +/- 20.0

-33

TABLE 3-5: GAMMA EMITTER CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2010 1.OE-3 pCi/m3 - 2 Sigma Page 1 of I SAMPLING FIRST SECOND THIRD FOURTH AVERAGE LOCATIONS NUCLIDE QUARTER QUARTER QUARTER QUARTER +/- 2 SIGMA SS Cs-134 0.99 +/- 0.99 1.39 +/- 1.21 -0.33 0.66 0.60 +/- 0.73 Cs-1 37 0.41 +/- 0.64 -0.05 +/- 0.82 0.05 0.76 0.29 +/- 0.68 Be-7 141 +/- 29.0 198 +/- 38.7 126 32.7 54.1 +/- 22.2 130 +/- 118 HIR Cs-1 34 0.30 +/- 0.70 1.66 +/- 1.64 -0.24 0.93 -1.15 +/- 1.33 Cs-1 37 0.57 +/- 0.75 -0.15 +/- 1.27 0.15 0.81 -0.28 +/- 0.94 Be-7 139 +/- 24.4 186 +/- 39.4 121 32.9 129 +/- 28.7 144 +/- 58.2 BC Cs-1 34 0.50 +/- 0.88 0.34 +/- 1.67 1.22 0.87 0.86 +/- 0.96 Cs-1 37 0.39 +/- 0.94 -0.05 +/- 1.11 0.32 _+ 0.83 -0.43 +/- 0.97 Be-7 174 +/- 36.2 135 + 34.8 132 29.8 84.6 +/- 27.3 131 +/- 73.2 ALL Cs-1 34 0.26 +/- 1.09 0.17 +/- 1.21 -0.47 0.82 0.08 +/- 1.03 Cs-137 0.13 +/- 0.70 0.85 +/- 1.12 -0.02 0.74 -0.47 +/- 0.69 Be-7 195 +/- 31.2 203 +/- 43.0 138 32.6 149 +/- 29.5 171 +/- 65.0 CP Cs-134 0.52 _+ 0.73 1.06 _+ 1.74 0.35 + 1.20 -0.25 +/- 0.59

+ +

Cs-1 37 0.33 0.84 -0.06 1.22 -0.03 + 0.98 0.00 +/- 0.55

_+ _+

Be-7 142 33.3 225 54.2 156 +/- 36.9 149 +/- 21.9 168 +/- 77

+

K-40 12.0 10.6 12.0 +/- 10.6

+

BASF Cs-1 34 0.77 +/- 1.04 1.34 1.12 0.16 + 0.97 -0.07 +/- 0.65

_+-

Cs-1 37 0.27 +/- 1.01 -0.31 1.14 -0.92 + 0.90 0.46 +/- 0.61

_+

Be-7 184 +/- 37.6 158 39.7 122 +/- 29.1 133 +/- 22.6 149 +/- 55.3

_+ + 0.79 FE Cs-1 34 0.90 +/- 0.90 0.90 1.55 0.57 0.72 +/- 0.88

_+ + 0.65 Cs-137 -0.07 +/- 0.66 -1.03 1.60 0.41 -0.16 +/- 0.78

+9 + 28.4 Be-7 154 +/- 29.7 199 52.4 121 132 +/- 27.0 152 +/- 69.0 NN-C Cs-134 0.45 0.77 0.96 +/- 1.20 0.49 + 0.63 0.27 +/- 0.67 Cs-137 -0.19 0.73 0.20 +/- 1.23 -0.39 + 0.62 0.31 +/- 0.65 Be-7 160 _+ 29.1 173 +/- 44.3 139 + 30.9 133 +/- 26.5 151 +/- 37.1 K-40 16.4 15.3 16.4 +/- 15.3 34

TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2010 pCi/Liter +/- 2 Sigma Page I of 3 COLONIAL NUCLIDE EPPS PARKWAY WILLIAMS-C JANUARY Cs-1 34 -0.84 + 1.82 -0.18 + 3.48 0.27 3.11

-+

Cs-1 37 2.95 1.79 -0.07 3.38 0.26 +¢ 3.33 Ba-1 40 4.45 19.1 30.0 30.3 -13.0 + 26.4

+}

La-140 -2.24 6.25 2.35 8.05 -2.96 + 7.56 1-131 -0.22 0.37 -0.21 0.35 -0.21 0.37 K-40 1299 102 1308 121 1139 130

+

Th-228 10.2 +{ 4.5 FEBRUARY +{

Cs-134 1.02 +. 4.87 -2.04 3.67 1.52 4.65 Cs-137 4.73 5.82 -2.20 3.98 -4.77 5.33

+

Ba-140 -0.27 22.4 4.09 + 16.3 -17.9 23.1 La-1 40 0.49 6.83 2.34 5.16 -4.52 7.20 1-131 0.00 + 0.36 -0.07 0.33 -0.16 0.3 K-40 1286 187 1272 152 1370 182 MARCH +

Cs-1 34 -6.15 5.00 -2.24 3.64 -3.25 4.10 Cs-1 37 2.00 4.66 -0.69 4.08 3.33 3.19 Ba-140 -1.16 25.3 -9.99 20.5 -10.0 16.1 La-1 40 8.13 6.78 -1.38 5.70 -0.874 4.23 1-131 -0.06 0.27 -0.23 0.41 -0.01 0.28 K-40 1256 129 1457 162 1316 89.2 Th-228 11.6 8.76 Sr-89 -0.93 +/- 2.17 Sr-90 0.59 +/- 0.45 APRIL Cs-134 -2.27 3.58 0.76 +¢ 3.57 -1.69 3.55 Cs-1 37 1.97 4.45 -0.01 + 3.82 0.87 3.24

+

+-

Ba-140 -0.91 20.3 14.1 15.7 -2.88 17.7 La-140 0.02 5.83 4.06 +- 4.85 -0.24 5.62 1-131 0.13 + 0.51 0.73 0.67 -0.08 0.56 K-40 1209 142 1375 123 1308 137 35

TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2010 pCi/Liter +/- 2 Sigma Page 2 of 3 COLONIAL NUCLIDE EPPS PARKWAY WILLIAMS-C MAY Cs-134 3.78 2.90 0.18 1.24 4.50 4.22 Cs-137 0.32 3.60 0.28 1.19 2.10 4.01 Ba-140 -20.10 22.80 -0.13 7.82 -15.40 26.60 La-I 40 0.29 6.77 -0.30 3.22 0.99 6.65 1-131 -0.30 0.32 0.21 0.37 -0.49 0.38 K-40 1268 124 1292 126 1349 111 Th-228 10.7 7.37 JUNE Cs-134 -0.81 2.81 -0.96 3.17 0.37 4.53 Cs-137 1.24 2.67 -1.80 3.29 2.19 3.76 Ba-I 40 -6.49 17.6 -15.2 23.3 10.0 25.2 La-140 -4.65 5.37 -4.62 7.27 -4.73 6.66 1-131 0.32 0.51 0.70 0.50 0.33 0.52 K-40 1233 103 1382 130 1338 111 Sr-89 -0.42 1.82 Sr-90 1.26 0.72 JULY Cs-134 -6.29 3.68 -2.76 3.48 -4.22 4.32 Cs-137 -0.30 3.65 -0.12 2.99 3.33 4.08 Ba-140 -7.2 15.2 11.1 14.4 4.76 20.1 La-140 2.29 4.34 -4.53 4.00 0.59 4.37 1-131 0.37 0.42 0.06 0.40 0.16 0.37 K-40 1173 133 1377 121 1229 127 AUGUST Cs-134 -5.75 3.49 0.12 5.11 0.84 4.01 Cs-I 37 -0.09 3.62 -1.95 5.34 -0.43 3.59 Ba-i 40 16.0 23.0 -13.80 33.5 8.08 26.9 La-140 1.07 7.65 -9.32 9.43 -0.25 6.01 1-131 0.36 0.39 0.07 0.35 0.34 0.38 K-40 1184 127 1315 177 1185 160 36

TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2010 pCi/Liter +/- 2 Sigma Page3 of 3 COLONIAL NUCLIDE EPPS PARKWAY WILLIAMS-C SEPTEMBER Cs-134 -1.25 +/- 3.43 -1.14 +/- 2.67 0.69 +/- 3.23 Cs-137 3.67 +/- 3.57 2.40 +/- 2.18 -0.49 +/- 2.85 Ba-140 -5.62 +/- 16.8 -3.42 +/- 11.0 -6.37 +/- 14.4 La-140 2.56 +/- 4.79 -1.19 +/- 3.25 -1.98 +/- 3.88 1-131 -0.22 +/- 0.46 -0.14 +/- 0.54 0.05 +/- 0.52 K-40 1143 +/- 128 1168 +/- 100 1149 +/- 114 Sr-89 -1.47 +/- 2.08 Sr-90 0.27 +/- 0.22 OCTOBER Cs-134 -1.72 +/- 3.99 -5.76 +/- 4.58 -3.97 +/- 3.94 Cs-137 1.78 +/- 3.94 -2.15 +/- 4.43 -0.96 +/- 3.84 Ba-140 4.32 +/- 14.9 -11.90 +/- 19.8 -21.7 +/- 18.8 La-140 -0.53 +/- 4.85 0.66 +/- 6.04 -0.38 +/- 4.67 1-131 -0.19 +/- 0.30 0.19 +/- 0.32 0.05 +/- 0.31 K-40 1141 +/- 143 1259 +/- 164 1232 +/- 145 Th-228 15.4 +/- 11.0 NOVEMBER Cs-134 -3.62 +/- 3.97 1.50 +/- 2.27 -7.17 +/- 3.14 Cs-137 1.34 +/- 3.96 0.39 +/- 2.09 0.11 +/- 3.35 Ba-140 -13.0 +/- 16.7 -2.20 +/- 9.75 7.05 +/- 13.6 La-140 1.22 +/- 4.09 1.31 +/- 2.86 -1.80 +/- 4.38 1-131 -0.28 +/- 0.52 -0.12 +/- 0.54 -0.15 +/- 0.44 K-40 1247 +/- 131 1210 +/- 104 1319 +/- 122 DECEMBER Cs-134 0.65 +/- 3.52 -10.90 +/- 4.20 -0.27 +/- 3.27 Cs-137 2.14 +/- 3.47 0.00 +/- 4.57 1.78 +/- 4.04 Ba-140 7.51 +/- 22.9 3.48 +/- 16.8 12.2 +/- 19.9 La-140 6.42 +/- 6.21 2.08 +/- 6.21 -0.27 +/- 5.94 1-131 0.15 +/- 0.29 0.07 +/- 0.28 -0.49 +/- 0.29 K-40 1127 +/- 116 1225 +/- 155 1308 +/- 146 Sr-89 0.31 +/- 2.07 Sr-90 0.60 +/- 0.51 37

TABLE 3-7: GAM1M EAMITER CONCENTRATIONIN FOODPRODUCTS Suny Power Station, Surny County, Vwrginia - 2010 pCi/kg (wt) +/- 2 Sigma Pag I of 1 SAMPLING COLLECTION SAMPLE I l LOCATIONS DATE TYPE Cs-134 Cs-137 1-131 K-40 Th-228 BROCK 11/16/2010 Corn -4.94 +/- 9.47 0.51 +/- 8.34 0.18 +/- 26.0 2660 +/- 294 9.39 +/- 22.2 FARM 11/16/2010 Peanuts -6.49 +/- 8.54 10.4 +/- 7.19 14.4 +/- 26.0 8330 +/- 290 22.3 +/- 14.8 SLADE 11/16/2010 Soybeans -5.13 +/- 10.8 1.84 +/- 9.52 9.58 +/- 29.4 15400 +/- 582 5.85 +/- 14.4 FARM 38

TABLE 3-8: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN WELL WA TER Surry Power Station, Surry County, Virginia - 2010 pCi/Liter +/- 2 Sigma Page 1 of 2 SAMPLING COLLECTION1 LOCATIONS DATE ISOTOPE Mn-54 Fe-59 Co-58 Co-60 Zn-65 SS 3/9/2010 -0.85 +/- 1.81 0.80 +/- 3.60 -1.37 +/- 1.73 0.35 +/- 1.76 -0.57 +/- 4.19 6/8/2010 0.369 +/- 2.16 0.05 +/- 5.11 0.61 +/- 2.66 -0.13 +/- 2.23 -1.08 +/- 5.60 9/14/2010 1.42 +/- 2.36 1.44 +/- 4.50 -0.65 +/- 2.32 0.63 +/- 2.26 -6.31 +/- 6.05 12/10/2010 1.25 +/- 2.66 3.54 +/- 7.31 -1.69 +/- 2.57 -2.39 +/- 3.11 -1.91 +/- 6.75 Zr-95 Nb-95 1-131 Cs-134 Cs-137 3/9/2010 -1.75 +/- 2.86 0.85 +/- 2.05 -0.21 +/- 0.30 0.29 +/- 1.92 -1.73 +/- 1.73 6/8/2010 -1.79 +/- 4.81 -0.71 +/- 2.78 0.049 +/- 0.33 1.21 +/- 2.70 -0.51 +/- 2.56 9/14/2010 1.54.+ 4.14 -1.13 +/- 2.23 -0.53 +/- 0.33 -0.96 +/- 2.74 -0.78 +/- 2.30 12/10/2010 -1.04 + 5.52 -3.22 +/- 3.37 -0.06 +/- 0.27 -1.20 +/- 3.44 -0.81 +/- 3.52 Ba-140 La-140 H-3 K-40 Th-228 3/9/2010 4.68 +/- 8.65 0.71 +/- 2.57 -236 +/- 600 109 +/- 31.0 7.42 +/- 3.97 6/8/2010 -3.86 +/- 19.4 -2.27 +/- 5.96 1340 +/- 931 9/14/2010 3.34 +/- 11.2 -1.06 +/- 3.37 5.45 +/- 676 16.2 +/- 8.59 12/10/2010 -1.57 +/- 15.1 0.33 +/- 5.37 -127 +/- 451 Mn-54 Fe-59 Co-58 Co-60 Zn-65 HIR 3/9/2010 0.03 +/- 2.62 1.01 +/- 5.85 -0.34 +/- 2.80 -1.23 +/- 2.71 -4.19 +/- 6.16 6/8/2010 -0.79 +/- 1.50 -0.20 +/- 3.43 0.06 +/- 1.37 0.35 +/- 1.58 -1.54 +/- 2.73 9/14/2010 1.18 +/- 3.47 2.11 +/- 6.28 -5.02 +/- 3.60 -3.15 +/- 3.34 4.10 +/- 7.10 12/10/2010 -1.12 +/- 3.02 1.77 +/- 6.62 -3.93 +/- 3.16 -0.52 +/- 3.11 -7.93 +/- 7.25 Zr-95 Nb-95 1-131 Cs-1 34 Cs-137 3/9/2010 -0.39 +/- 4.42 -0.67 +/- 2.84 -0.16 +/- 0.29 -1.33 +/- 2.63 -3.45 +/- 3.05 6/8/2010 -1.57 +/- 3.24 -0.19 +/- 1.72 -0.07 +/- 0.29 -0.86 +/- 1.66 0.49 +/- 1.73 9/14/2010 -4.15 +/- 5.85 3.71 +/- 4.95 0.16 +/- 0.46 3.04 +/- 3.65 -0.80 +/- 3.53 12/10/2010 1.62 +/- 6.08 1.71 +/- 3.64 -0.25 +/- 0.28 1.45 +/- 3.81 3.42 +/- 3.80 Ba-140 La-140 H-3 K-40

-+

3/9/2010 10.1 +/- 14.1 -2.11 +/- 3.99 -144 605 6/8/2010 7.59 +/- 13.6 0.02 +/- 2.98 -497 571 61.2 +/- 57.7

.+

9/14/2010 7.31 +/- 15.9 2.24 +/- 5.49 -555 638 12/10/2010 2.77 +/- 17.9 -2.77 +/- 5.06 -101 448 39

TABLE 3-8: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN WELL WA TER Surry Power Station, Surry County, Virginia - 2010 pCi/liter +/- 2 Sigma Page 2 of 2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Fe-59 Co-58 Co-60 Zn-65 CS 03/09/2010 -0.34 +/- 2.49 1.83 +/- 5.10 -1.58 +/- 2.39 -1.05 + 2.24 0.95 +/- 6.07 06/08/2010 -2.29 +/- 2.68 -5.09 +/- 5.85 -2.14 +/- 2.82 1.63 + 2.54 1.55 +/- 5.75 09/14/2010 0.49 +/- 3.38 4.04 +/- 6.85 0.42 +/- 3.30 -1.92 + 3.81 -22.2 +/- 10.5 12/10/2010 0.81 +/- 2.88 3.91 +/- 5.13 -3.07 +/- 2.57 0.27 + 2.55 4.49 +/- 5.86 Zr-95 Nb-95 1-131 Cs-134 Cs-137 03/09/2010 -3.96 +/- 4.31 2.57 +/- 2.90 0.40 +/- 0.47 -0.37 +/- 2.62 0.30 +/- 2.66 06/08/2010 -5.85 +/- 5.06 -0.45 +/- 3.63 0.02 +/- 0.28 0.66 +/- 2.48 -0.76 +/- 2.80 09/14/2010 -1.94 +/- 6.29 0.29 +/- 3.74 -0.40 +/- 0.47 -0.91 +/- 4.19 -0.31 +/- 3.40 12/10/2010 0.47 +/- 4.68 2.18 +/- 2.82 0.03 +/- 0.25 -0.26 +/- 3.01 0.01 +/- 2.35 Ba-140 La-140 H-3 03/09/2010 -2.18 +/- 11.5 2.16 +/- 3.94 -352 + 598 06/08/2010 -10.2 +/- 18.0 1.29 +/- 5.98 -766 + 555 09/14/2010 7.06 +/- 16.8 -0.47 +/- 5.94 -326 + 656 12/10/2010 -1.79 +/- 13.8 1.65 +/- 3.79 412 + 897 40

TABLE 3-9: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN RIVER WA TER Surry Power Station, Sunry County, Virginia - 2010 pCi/Liter A 2 Sigma Page 1 of 2 SAMPLING COLLECTIONI LOCATIONS DATE ISOTOPE Mn-54 Fe-59 Co-58 Co-60 Zn-65 SD 1/19/2010 -0.08 + 1.93 0.96 +/- 4.31 1.64 +/- 2.10 2.23 + 1.91 2.02 + 4.01

_+

2/16/2010 1.22 2.18 -1.51 +/- 4.93 -2.54 +/- 2.80 0.55 + 2.80 4.48 _+ 5.42

+

3/9/2010 -1.39 3.81 3.87 +/- 6.71 -2.58 +/- 2.93 -1.89 + 3.14 -4.68 + 8.18

+

4/27/2010 -0.09 1.06 0.12 +/- 2.44 -0.58 +/- 1.13 -0.82 + 1.07 -4.84 + 2.43

+

5/27/2010 -0.18 0.74 -0.74 +/- 1.76 -0.77 +/- 0.79 0.29 + 0.68 0.20 +

1.73

+

6/15/2010 -1.75 2.20 -1.48 +/- 4.53 0.07 +/- 2.28 -2.83 + 2.29 -3.32 +

4.67

+-

7/13/2010 -1.18 3.62 -2.19 +/- 7.61 -0.39 +/- 3.24 -2.15 + 3.99 9.44 +

8.98

+

8/17/2010 1.12 2.74 -3.99 +/- 5.89 -1.92 +/- 2.75 -2.15 + 2.47 -0.27 +

6.36

+

9/14/2010 1.28 2.09 -1.47 +/- 4.65 0.06 +/- 2.11 -1.64 + 2.35 -1.46 +

4.71

+

10/11/2010 0.70 2.81 3.05 +/- 6.44 -0.77 +/- 3.04 1.28 + 2.77 -5.34 +

6.30

+

11/9/2010 -0.16 1.70 3.05 +/- 4.84 -1.03 +/- 2.60 0.00 _+ 2.20 -7.04 +

5.23

+

12/14/2010 1.37 3.04 -2.47 +/- 7.76 0.37 +/- 3.49 -1.23 + 3.40 5.60 +

7.51 Zr-95 Nb-95 1-131 Cs-1 34 Cs-1 37 1/19/2010 -1.57 +/- 3.69 1.03 +/- 2.44 -1.65 +/- 6.06 -0.13 +/- 2.16 0.44 +/- 2.08 2/16/2010 1.84 +/- 4.53 0.65 +/- 2.51 -1.86 +/- 5.92 2.69 +/- 3.74 3.91 +/- 2.66 3/9/2010 3.22 + 5.13 -0.42 + 3.51 -0.43 + 5.99 0.61 + 3.41 -0.62 + 3.72 4/27/2010 -0.89 +/- 2.02 -0.52 _+ 1.25 -1.59 +/- 4.11 0.27 + 1.19 -1.43 + 1.41 5/27/2010 0.38 + 1.37 0.05 + 0.82 -1.04 + 3.04 0.17 + 0.79 0.23 + 0.75 6/15/2010 0.22 + 3.88 -0.27 + 2.45 4.58 + 5.16 -0.29 + 2.77 2.33 + 2.62 7/13/2010 3.20 + 5.84 2.98 + 4.01 -2.40 + 5.12 -1.11 + 4.23 -1.04 + 4.27 8/17/2010 -3.05 + 4.79 -0.35 + 3.06 0.57 + 5.81 -0.03 + 2.89 -1.17 + 2.91 9/14/2010 -1.41 + 4.13 -0.14 + 2.43 -1.52 + 6.22 -1.09 _+ 1.94 1.96 +/- 2.12 10/11/2010 -3.62 + 4.91 -0.10 + 2.95 -2.05 + 5.89 -6.40 + 3.01 -1.06 + 3.15 11/9/2010 -0.44 + 3.80 -0.24 + 2.28 -0.37 + 4.05 1.04 + 2.30 1.20 + 2.26 12/14/2010 -3.41 + 5.93 0.78 + 3.33 -0.57 + 4.78 -6.36 + 3.98 2.38 + 3.69 Ba-140 La-140 H-3 K-40 1/19/2010 -11.8 + 14.0 0.12 +/- 3.31 54.8 +/- 50.8 2/16/2010 -0.65 + 14.6 0.52 +/- 4.62 3/9/2010 1.84 + 17.1 -1.91 +/- 4.85 -1020 +/- 480 4/27/2010 6.56 + 8.86 0.74 +/- 2.78 63.0 +/- 26.1 5/27/2010 4.19 + 6.15 -1.20 + 1.92 74.6 + 18.6 6/15/2010 1.40 + 13.0 1.88 + 4.11 1760 +/- 1110 120 + 62.9 7/13/2010 5.20 + 14.6 1.78 + 4.43 83.7 + 77.0 8/17/2010 3.50 + 14.3 0.33 + 4.38 117 + 70.2 9/14/2010 6.37 + 13.7 -0.08 + 4.37 223 +/- 413 151 + 60.4 10/11/2010 1.35 + 15.0 4.42 + 5.02 147 + 63.2 11/9/2010 -1.18 + 10.7 -1.36 + 3.03 108 + 48.7 12/14/2010 -0.97 + 13.8 -0.49 + 4.95 -126 +/- 580 41

TABLE 3-9: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN RIVER WATER Surry Power Station, Surry County, Virginia - 2010 pCi/i.ter +/- 2 Sigma Page 2 of 2 IOSAMPLING COLLECTIOND LOCATIONS DATE ISOTOPES Mn-54 Fe-59 Co-58 Co-60 Zn-65 SW-C 01/19/2010 0.18 + 1.96 0.47 +/- 4.17 -0.98 +/- 2.11 0.75 _+ 1.83 2.74 +/- 4.49 02/16/2010 0.94 + 2.83 -0.60 +/- 6.17 -0.91 +/- 3.08 1.68 + 3.06 -1.15 +/- 5.68 03/09/2010 -0.76 + 2.59 -6.04 +/- 5.62 -0.01 +/- 2.83 -0.27 + 2.81 -0.50 +/- 5.92 04/27/2010 0.07 + 1.07 -1.92 +/- 2.45 -0.34 +/- 1.18 -0.43 + 1.08 -5.07 +/- 2.23 05/25/2010 -0.34 _+ 0.83 -0.28 +/- 2.09 0.18 +/- 0.96 -0.25 + 0.78 -1.43 +/- 1.63 06/15/2010 -0.68 + 3.02 -1.18 +/- 5.02 -1.22 +/- 2.99 0.41 _+ 2.33 -0.22 +/- 5.17 07/13/2010 -0.83 + 5.19 1.27 +/- 8.41 1.10 +/- 3.82 -1.43 + 5.74 -8.55 +/- 8.95 08/17/2010 -0.08 + 2.92 1.34 +/- 6.64 0.18 +/- 2.79 -1.86 + 3.04 -4.87 +/- 6.51 09/14/2010 0.79 + 2.00 2.05 +/- 4.19 -0.76 +/- 2.06 0.32 _+ 1.98 -4.26 +/- 4.68 10/12/2010 -0.85 + 2.48 -6.04 +/- 5.90 0.37 +/- 2.56 1.94 + 2.75 0.62 +/- 6.00 11/09/2010 -0.27 + 2.31 3.78 +/- 4.47 -0.73 +/- 2.19 1.27 + 2.50 -1.56 +/- 4.81 12/14/2010 1.02 + 3.41 -5.36 +/- 6.94 -1.41 +/- 3.26 2.68 + 3.11 1.49 +/- 7.47 Zr-95 Nb-95 1-131 Cs-134 Cs-1 37 01/19/2010 1.53 +/- 3.63 2.51 +/- 2.13 -0.97 +/- 5.74 -1.44 +/- 2.11 0.50 +/- 2.21 02/16/2010 0.92 +/- 5.87 -1.76 +/- 2.88 -3.58 +/- 5.98 -5.49 +/- 3.74 0.26 +/- 3.08 03/09/2010 -0.17 _+ 4.94 2.17 _+ 2.92 2.66 + 4.74 -1.75 + 2.78 -3.44 + 3.06 04/27/2010 -0.13 _+ 2.11 -0.78 + 1.21 0.62 + 4.52 -0.32 + 1.50 -0.30 + 1.41 05/25/2010 -1.29 + 1.74 -0.48 +_ 1.03 -0.95 + 5.33 -0.68 + 1.04 0.01 _+ 0.85 06/15/2010 4.91 + 4.94 -3.82 + 3.47 1.05 + 5.54 -1.54 + 3.33 -1.12 + 3.03 07/13/2010 -4.38 _+ 6.37 4.59 + 4.03 2.12 + 5.83 3.79 + 5.15 -2.07 + 4.73 08/17/2010 0.48 + 4.59 -0.43 _+ 2.95 2.05 + 5.92 -5.98 + 3.41 1.36 + 3.16 09/14/2010 -0.62 + 3.76 -0.57 _+ 2.14 -2.77 + 5.96 -0.49 + 1.81 -0.72 + 2.22 10/12/2010 -1.62 + 4.40 0.65 + 2.52 -0.66 + 5.18 0.34 + 2.60 0.60 + 2.43 11/09/2010 1.10 + 4.60 0.63 _+ 2.58 -0.82 + 4.13 -0.96 + 2.45 0.88 + 2.82 12/14/2010 3.05 + 6.66 7.45 _+ 4.03 0.43 + 4.29 2.28 + 3.35 1.90 _+ 3.41 Ba-140 La-140 H-3 K-40 Th-228 01/19/2010 9.44 +/- 13.2 -2.26 +/- 3.61 5.67 +/- 4.68 02/16/2010 9.16 +/- 16.1 -1.73 +/- 4.95 109 + 59.7 03/09/2010 3.99 +/- 13.7 0.28 +/- 4.37 -588 +/- 500 04/27/2010 -2.62 +/- 9.19 3.29 +/- 3.13 36.8 + 27.4 05/25/2010 1.29 + 8.98 -0.27 + 2.31 35.7 + 23.4 06/15/2010 3.81 + 13.4 0.57 + 4.63 -572 +/- 603 122 + 66.5 10.30 +/- 7.78 07/13/2010 8.90 +_ 16.2 0.81 + 6.05 114 + 83.8 08/17/2010 9.50 +_ 16.4 -1.51 _+ 4.12 246 + 60.6 09/14/2010 -1.99 _-+ 14.7 -2.20 + 3.75 144 +/- 401 76.0 _+ 50.4 10/12/2010 5.27 + 14.1 -1.12 + 4.37 139 _+ 60.2 11/09/2010 -10.7 + 10.9 -0.43 + 3.58 72.0 _+ 54.3 12/14/2010 -7.31 14.3 1.98 + 4.10 -89.0 +/- 608 Ra-226 5/25/2010 54.5 +/- 51.6

• Ra-226 was identified only in the May sample for 2010 42

TABLE 3-10: GAMMA EMITTER CONCENTRATIONS IN SILT Surry Power Station, Surry County, Virginia - 2010 pCi/kg (dry) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION/

LOCATIONS DATE ISOTOPE Cs-134 Cs-137 K-40 Th-232 Th-228 SD 04/06/2010 -4.06 +/- 39.4 175 +/- 47.9 13600 +/- 1180 1000 +/- 168 1140 +/- 93.1 09/08/2010 -0.74 +/- 33.2 187 +/- 64.1 14100 +/- 1310 1090 +/- 168 970 +/- 109 Ra-226 04/06/2010 2140 +/- 1100 09/08/2010 1430 +/- 1400 Cs-1 34 Cs-137 K-40 Th-232 Th-228 CHIC-C 04/06/2010 -5.81 +/- 45.2 152 +/- 62.9 14600 +/- 1540 957 +/- 217 1110 +/- 146 09/08/2010 9.76 +/- 37.9 202 +/- 67.4 16100 +/- 1570 1020 +/- 205 965 +/- 148 Ra-226 Ac-228 04/06/2010 3450 +/- 1550 09/08/2010 2340 +/- 1360 434 +/- 353 43

TABLE 3-11: GAMMA EMITTER CONCENTRATIONS IN SHORELINE SEDIMENT Surry Power Station, Surry County, Virginia - 2010 pCi/kg (dry) L 2 Sigma Page 1 of 1 SAMPLING COLLECTIONI LOCATIONS DATE ISOTOPE Cs-1 34 Cs-1 37 K-40 Th-228 Ra-226 HIR 2/8/2010 3.49 +/- 19.8 -15.7 +/- 18.1 7070 +/- 721 76.5 +/- 42.6 608 +/- 453 8/17/2010 5.69 +/- 26.4 -19.2 +/- 27.7 9420 +/- 833 882 +/- 74.2 1250 +/- 771 Th-232 Ac-228 2/8/2010 8/17/2010 765 +/- 141 249 +/- 219 Cs-1 34 Cs-137 K-40 Th-228 Ra-226 CHIC-C 2/8/2010 -2.45 +/- 25.2 -18.3 +/- 26.6 2290 +/- 621 1230 +/- 81.5 1320 +/- 854 8/17/2010 0.57 +/- 6.75 -4.95 +/- 7.89 5730 +/- 662 523 +/- 511 750 +/- 620 Th-232 2/8/2010 1090 +/- 104 8/17/2010 438 +/- 84.5 44

TABLE 3-12: GAMMA EMITTER CONCENTRATION IN FISH Surry Power Station, Surry County, Virginia - 2010 pCi/kg (wet) l 2 Sigma Page 1 of 1 SAMPLING COLLECTION SAMPLE I LOCATION DATE TYPE ISOTOPE K-40 Co-58 Co-60 Cs-134 SD 04/07/2010 Catfish 692 +/- 283 9.59 +/- 12.3 6.65 +/- 12.2 3.70 +/- 14.1 04/30/2010 White Perch 1170 +/- 713 -4.67 +/- 33.7 6.82 +/- 24.7 -25.8 +/- 29.2 10/05/2010 Catfish 3290 +/- 747 14.0 +/- 29.5 -25.1 +/- 34.1 -38.3 +/- 32.1 10/05/2010 White Perch 2980 +/- 709 -16.7 +/- 28.9 -16.2 +/- 26.2 -4.28 +/- 27.6 Cs-1 37 Fe-59 Mn-54 Zn-65 04/07/2010 Catfish 9.16 +/- 12.4 -1.99 +/- 31.3 6.26 +/- 12.5 23.5 +/- 28.3 04/30/2010 White Perch -0.24 +/- 23.1 40.2 +/- 80.4 28.8 +/- 26.9 -42.8 +/- 57.3 10/05/2010 Catfish 26.7 +/- 30.7 64.4 +/- 61.7 10.7 +/- 28.6 -99.1 +/- 74.6 10/05/2010 White Perch -8.29 +/- 23.4 -13.7 +/- 62.5 19.9 +/- 26.8 -4.94 +/- 56.8 45

TABLE 3-13: GAMMA EMITTER CONCENTRATIONS IN OYSTERS Surry Power Station, Surry County, Virginia - 2010 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTIONI LOCATIONS DATE ISOTOPE Co-58 Co-60 Cs-1 34 Cs-137 POS 04/06/2010 -0.47 +/- 19.1 -6.1 +/- 16.4 -4.22 +/- 20.4 1.48 +/- 19.7 09/08/2010 2.86 +/- 30.0 -15.7 +/- 23.2 -4.40 +/- 32.4 -11.4 +/- 33.9 Fe-59 Mn-54 Zn -65 K-40 04/06/2010 3.82 +/- 46.4 4.6 +/- 18.5 -62.8 +/- 46.8 09/08/2010 -9.85 +/- 61.2 -13.5 +/- 26.1 -25.5 +/- 63.0 1150 +/- 577 Co-58 Co-60 Cs-1 34 Cs-137 MP 04/06/2010 -12.2 +/- 25.2 5.69 +/- 18.4 0.53 +/- 25.3 11.1 +/- 21.6 09/08/2010 7.88 +/- 28.2 30.0 +/- 24.9 13.1 +/- 27.8 17.1 +/- 26.6 Fe-59 Mn-54 Zn-65 K-40 04/06/2010 27.1 +/- 52.7 4.8 +/- 21.3 11.3 +/- 49.8 09/08/2010 -23.9 +/- 63.3 -15.9 +/- 27.6 -53.5 +/- 59.9 622 +/- 554 46

TABLE 3-14: GAMMA EMITTER CONCENTRATIONS IN CLAMS Surry Power Station, Surry County, Virginia - 2010 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTIONI LOCATIONS DATE ISOTOPE Co-58 Co-60 Cs-134 Cs-137 JI 04/06/2010 -7.51 +/- 23.3 20.20 +/- 19.2 -48.40 +/- 24.0 -13.10 +/- 22.8 09/08/2010 -8.65 +/- 29.10 5.35 +/- 22.10 -39.30 +/- 26.60 -16.80 +/- 26.4 Fe-59 Mn-54 Zn-65 Ra-226 04/06/2010 33.20 +/- 53.8 2.77 +/- 23.6 -15.00 +/- 49.4 09/08/2010 13.70 +/- 62.00 1.09 +/- 20.60 -32.20 +/- 59.30 931 +/- 807 Co-58 Co-60 Cs-134 Cs-1 37 SD 04/06/2010 -12.20 +/- 20.0 -4.72 +/- 19.5 -14.10 +/- 19.9 12.80 +/- 16.6 09/08/2010 -17.50 +/- 37.90 -6.56 +/- 33.90 -7.81 +/- 44.20 16.10 +/- 34 Fe-59 Mn-54 Zn-65 K-40 04/06/2010 -43.90 +/- 41.1 -8.90 +/- 15.6 -2.54 +/- 43.5 09/08/2010 -30.20 +/- 78.50 -26.50 +/- 33.80 19.00 +/- 80.60 728 +/- 615 Co-58 Co-60 Cs-1 34 Cs-137 LC 04/06/2010 3.66 +/- 28.8 18.40 +/- 23.1 4.24 +/- 24.6 -16.20 +/- 25.2 09/08/2010 -24.90 +/- 32.90 -8.27 +/- 27.20 -29.20 +/- 27.80 -2.14 +/- 27 Fe-59 Mn-54 Zn-65 Th-228 04/06/2010 9.74 +/- 65.6 6.18 +/- 24.3 44.20 +/- 44.3 91.60 +/- 50.7 09/08/2010 -26.40 +/- 60.90 0.20 +/- 28.60 80.70 +/- 84.40 70.90 +/- 55 Co-58 Co-60 Cs-134 Cs-1 37 CHIC-C 04/06/2010 3.50 +/- 25.4 -29.60 +/- 21.9 -4.37 +/- 22.8 -9.12 +/- 23.5 09/08/2010 17.80 +/- 26.00 0.04 +/- 23.80 -18.80 +/- 27.30 17.80 +/- 26 Fe-59 Mn-54 Zn-65 04/06/2010 -3.49 +. 60.7 -14.50 +/- 22.9 -46.60 +/- 49.1 09/08/2010 -15.60 + 64.60 -6.45 +/- 22.70 -68.10 +/- 45.90 47

TABLE 3-15: GAMMA EMITTER CONCENTRA TIONS IN CRABS Surny Power Station, Surry County, Virginia - 2010.

pCi/kg (wet) +/- 2 Sigma Page 1 of I SAMPLING COLLECTIONJ LOCATIONS DATE ISOTOPE K-40 Co-58 Co-60 Cs-1 34 SD 06/08/2010 1680 +/- 708 -40.6 +/- 27.3 -3.15 +/- 22.8 5.98 +/- 26.8 Cs-1 37 Fe-59 Mn-54 Zn-65

-6.94 +/- 28.8 4.34 +/- 52.7 1.83 +/- 25.1 1.74 +/- 67.5 48

4. DISCUSSION OF RESULTS Data from the radiological analyses of environmental media collected during 2010 and tabulated in Section 3, are discussed below. The procedures and specifications followed in the laboratory for these analyses are as required in the Teledyne Brown Engineering quality assurance manuals and laboratory procedures. In addition to internal quality control measures performed by the laboratories, they also participate in an Interlaboratory Comparison Program.

Participation in this program ensures that independent checks on the precision and accuracy of the measurements of radioactive material in environmental samples are performed. The results of the Interlaboratory Comparison Program are provided in Appendix B.

The predominant radioactivity detected throughout 2010 was from external sources, such as fallout from nuclear weapons tests (cesium- 137, strontium-90) and naturally occurring radionuclides. Naturally occurring nuclides such as beryllium-7, potassium-40, and thorium-228 were detected in numerous samples.

The following is a discussion and summary of the results of the environmental measurements taken during the 2010 reporting period.

4.1 Gamma Exposure Rate A thermoluminescent dosimeter (TLD) is an inorganic crystal used to detect ambient radiation. Two TLDs, made of CaF and LiF elements and specifically designed for environmental monitoring, are deployed at each sampling location.

TLDs are placed in two concentric rings around the station. The inner ring is located in the vicinity of the site boundary, and the outer ring is located at approximately five miles from the station. TLDs are also placed in special interest areas, such as population centers and nearby residences. Additional TLDs serve as controls. Ambient radiation comes from naturally occurring radioisotopes in the air and soil, radiation from cosmic origin, fallout from nuclear weapons testing, station effluents and direct radiation from the station.

The results of the TLD analyses are presented in Table 3-2. Figure 4-1 shows a historical trend of TLD exposure rate measurements, comparing the average of indicator TLDs located near the site boundary and at 5 miles to the average of all control TLD locations. Control and indicator averages indicate a steady relationship.

49

Figure 4-1: DIRECT RADIATION MEASUREMENT TLD RESULTS 8

7 6

2 5'A U3 I

E 2 0 0 0 . . . . .

-- Site Boundry --- - 5 Mile - Avg Control 4.2 Airborne Gross Beta Air is continuously sampled by passing it through glass fiber particulate filters.

The filters collect airborne particulate radionuclides. Once a week the samples are collected and analyzed for gross beta activity. Results of the weekly gross beta analyses are presented in Table 3-3. A review of the results from control and indicator locations continues to show no significant variation in measured activities (see Figure 4-2 and 4-3). This indicates that any station contribution is not measurable.

Gross beta activity found during the pre-operational and early operating period of Surry Power Station was higher because of nuclear weapons testing. During that time, nearly 740 nuclear weapons were tested worldwide. In 1985 weapons testing ceased, and with the exception of the Chernobyl accident in 1986, airborne gross beta results have remained steady.

50

Figure 4-2:2010 GROSS BETA IN AIR PARTICULATES 0.040 0.035 0.030 0.025 o$~\ , / ,'. '* (I!!

0.020 . .

0.015 i 0.010. N- I\ li, A A 0.005 0.000 o C4- - C - M -- A It - t C-- -  : - C tr Cl C Cl C C-m

- -- Avg Indicator --- - Ave Control Figure 4-3: GROSS BETA IN AIR PARTICULATES HISTORICAL TREND 1.0E+00 1.OE-01 1.OE-02

-Cl '.0

ýc 00 ONC -n Cl ri CC.N O 00 C,

-- M- Avg Indicatr Avg Control - Avg-Pre Op - Required LLD 51

4.3 AirborneRadioiodine Air is also continuously sampled for radioiodines by passing it through charcoal cartridges. Once a week the charcoal cartridge samples are collected and analyzed. The results of the analyses are presented in Table 3-4. All results are below the lower limit of detection. No positive iodine-131 was detected. These results are similar to pre-operational data and the results of samples taken prior to and after the 1986 accident in the Soviet Union at Chernobyl.

4.4 Air ParticulateGamma The air particulate filters from the weekly gross beta analyses are composited by location and analyzed quarterly by gamma spectroscopy. The results are listed in Table 3-5. The results indicate the presence of naturally occurring beryllium-7, which is produced by cosmic processes. No man-made radionuclides were identified. These analyses confirm the lack of station effects.

4.5 Cow Milk Analysis of milk samples is generally the most sensitive indicator of fission product existence in the terrestrial environment. This, in combination with the fact that consumption of milk is significant, results in this pathway usually being the most critical from the plant release viewpoint. This pathway also shows measurable amounts of nuclear weapons testing fallout. Therefore, this media needs to be evaluated very carefully when trying to determine if there is any station effect.

Analysis results for cow milk are contained in Table 3-6. All results show a lack of detectable iodine-131 above the LLD of 1 pCi/L. Results of gamma spectroscopy indicate no other detectable station related radioactivity in the milk samples. In years past, cesium-137 has been detected sporadically. The occurrences were attributed to residual global fallout from past atmospheric weapons testing. Cs-137 was not detected at a level above the LLD in 2010.

At the request of the Commonwealth of Virginia, a quarterly composite sample is prepared from the monthly milk samples from the Colonial Parkway collection station. The composite samples are analyzed for strontium-89 and strontium-90.

Sr-90 was detected in one of the four composites analyzed at a concentration of 1.26 pCi/L. The average Sr-90 concentration for the ten year period of 2001 to 2010 is 1.82 pCi/L. Sr-90 is not a component of the station radiological effluents.

The Sr-90 detected is a product of nuclear weapons testing fallout which has been well documented.

52

4.6 Food Products Three samples were collected and analyzed by gamma spectroscopy. The results of the analyses are presented in Table 3-7. As expected, naturally occurring potassium-40 was detected in all samples. The average concentration is consistent with that observed in previous years. Naturally occurring thorium-228 was also detected in one of three samples. No station related radioactivity was detected.

4.7 Well Water Well water is not considered to be affected by station operations because there are no discharges made to this pathway. However, Surry Power Station monitors well water quarterly at three indicator locations and analyzes for gamma radiation and for tritium. The results of these analyses are presented in Table 3-8. Consistent with past monitoring, no station related radioactivity was detected. Naturally occurring potassium-40 and thorium-228 were detected in one sample each. No gamma emitting isotopes were detected during the pre-operational period.

4.8 River Water Samples of the James River water are collected monthly and the results are presented in Table 3-9. All samples are analyzed by gamma spectroscopy. The monthly samples are also composited and analyzed for tritium on a quarterly basis. With the exception of natural products, no other gamma emitters were detected. Tritium was detected in one of eight samples at 1,760 pCi/liter. This concentration represents 5.9% of the 30,000 pCi/liter NRC reporting level concentration. The tritium was detected at the station discharge canal indicator sample location. The water in the discharge canal is further diluted by the river water beyond the discharge structure. No tritium or gamma emitting radionuclides were detected in the control river water samples. Naturally occurring potassium-40, thorium-228 and radium-226 were detected in some samples. No station related radioactivity was detected.

4.9 Silt Silt is sampled to evaluate any buildup of radionuclides in the environment due to the operation of the station. Sampling of this pathway provides a good indication of the dispersion effects of effluents to the river. Buildup of radionuclides in silt could indirectly lead to increasing radioactivity levels in clams, oysters, crabs and fish.

Samples of silt are collected from two locations, one upstream and one 53

downstream of the station. The results of the gamma spectroscopy analyses are presented in Table 3-10. Historically, cobalt-60 has been detected in samples obtained from the indicator location (SD). Cobalt-60 has not been detected since 2003. Trend graphs of cobalt-60 and cesium-137 in silt appear in Figures 4-4 and 4-5.

Cesium- 137 was detected, as expected, in both the control and indicator samples.

The levels detected indicate a continual decreasing trend seen for over a decade.

The detection of cesium-137 in both the control and indicator samples and decreasing levels indicate that the presence of cesium-137 is the result of accumulation and runoff into the river of residual weapons testing fallout. Its global presence has been well documented. During the pre-operational period, cesium-137 was detected in most silt samples with an average concentration as indicated in Figure 4-5. In 2010, cesium-137 was detected with an average indicator location concentration of 181 pCi/kg and an average control location concentration of 177 pCi/kg. These activities continue to represent fallout from nuclear weapons testing. Both indicator and control cesium-137 activities trend closely as shown in Figure 4-5.

Figure 4-4: COBALT-60 INSILT 1.OE+04 1.OE+03 g 1.OE+02 U

C.

L.OE+01 1.0E+00 C'

s \ 00 0C:> ý0~ 00 0C> \.0 00 0C:) ý0~ 00 CD NN N N 00 00 00 00 00 ON ON ON ON 7N 0:: 0= a>0 0

ON ON' ON ON ON ONC5N O N ON O N O 0 C5 73

-9 Station lControl C

-Cnrl-Chickahominy - - SainDischarge Chickahominy had detectable activity in 1982 and 1984 through 1994. Other years were <MDC, Minimum Detectable Concentration. Station Discharge was <MDC activity 1996 through 1998 and 2004 through 2010.

54

Figure 4-5: CESIUM-1 37 IN SILT 1.OE+04 1.0E+03 O

C .)

1.OE+02 rq 10 00 C) (N 00 I= (N 10 00 0ý (Ný 0 00 0 N

N N N 00 00 00 00 00 ON ON N ON ON 0 C>~ 0 0 a ON N N NN NN N O O O O O O 0 0 0 C0 0 0

---

Control - Chickahominy & Station Discharge - Ave-Pre Op - Required LLD 4.10 Shoreline Sediment Shoreline sediment, unlike river silt, may provide a direct dose to humans.

Buildup of radionuclides along the shoreline may provide a source of direct exposure for those using the area for commercial and recreational uses. The results are presented in Table 3-11.

The naturally occurring radionuclides potassium-40 and thorium-228 were detected at concentrations equivalent to normal background activities. The activities of these radionuclides indicate a steady trend. There were no radionuclides attributable to the operation of the station found in any shoreline sediment samples.

4.11 Fish The radioactivity measured in fish sampled from the station discharge canal and analyzed by gamma spectroscopy is presented in Table 3-12. These results are the same as those seen over the last decade. No activity was observed in this media except for naturally occurring potassium-40.

55

4.12 Oysters Oysters are collected from two different locations. The results of the oyster analyses are presented in Table 3-13.

There were no gamma emitting radionuclides detected in oysters sampled except for naturally occurring potassium-40. No station related radioactivity has been detected in this media since 1991. The absence of station related radionuclides is attributable to the replacement of steam generators in 1982 and past improvements made to liquid effluent treatment systems.

4.13 Clams Clams are analyzed from four different locations. The results of the gamma spectroscopy analyses are presented in Table 3-14. Like oysters, no station related radioactivity was detected. Naturally occurring potassium-40, radium-226 and thorium-228 were detected.

4.14 Crabs A crab sample was collected in June from the station discharge canal and analyzed by gamma spectroscopy. The results of the analysis are presented in Table 3-15. Other than naturally occurring potassium-40, no other gamma emitting radionuclides were detected in the sample. This is consistent with pre-operational data and data collected over the past decade.

56

5. PROGRAM EXCEPTIONS There were no REMP exceptions for scheduled sampling and analysis during 2010.

During the March 2008 clam sampling campaign, clams were not found at the Hog Island Point sample location. An alternate sampling location, Jamestown Island, was selected and sampled throughout 2008. In 2010, clams continued to be sampled at the Jamestown Island location in place of the Hog Island Point location.

57

6. CONCLUSIONS The results of the 2010 Radiological Environmental Monitoring Program for Surry Power Station have been presented in previous sections. This section presents conclusions for each pathway.

Direct Radiation Exposure Pathway - Control and indicator location averages continue to indicate a steady relationship and trend over the long term.

Airborne Exposure Pathway - Analysis of charcoal cartridge samples for radioiodines indicated no positive activity was detected. Quarterly gamma isotopic analyses of the composite particulate samples identified only naturally occurring beryllium-7. Air particulate gross beta concentrations at all of the indicator locations for 2010 trend well with the control location.

AMilk - Milk samples are an important indicator measuring the effect of radioactive iodine and radionuclides in airborne releases. Cesium-137 and iodine-131 were not detected in any of the thirty-six samples. Naturally occurring potassium-40 and thorium-228 were detected at a similar level when compared to the average of the previous year.

Strontium-90 was detected in one of four samples this year at a concentration of 1.26 pCi/L. Strontium-90 is not a component of station effluents, but rather, a product of nuclear weapons testing fallout.

> Food Products - As expected, naturally occurring potassium-40 was detected in all three samples and naturally occurring thorium-228 was detected in one of three samples. In the past, cesium-137 has occasionally been detected in these samples and is attributable to global fallout from past nuclear weapons testing. Cesium-137 was not detected in any of the three samples collected in 2010.

> Well Water - Well water samples were analyzed and the analyses indicated that there were no man-made radionuclides present. This trend is consistent throughout the monitoring period. No radioactivity attributable to the operation of the station was identified.

> River Water - All river water samples were analyzed for gamma emitting radionuclides. The naturally occurring radionuclides potassium-40, thorium-228 and radium-226 were detected. Tritium was detected in one of eight samples with a concentration of 1,760 pCi/liter. This represents 5.9%

of the NRC reporting level concentration. Because river water is not used for drinking water or for crop irrigation, there is a reduced dose consequence to the public from this pathway.

58

Silt - Cesium-137 was detected in both the control and indicator samples.

The presence of cesium- 137 is attributable to residual weapons testing fallout; its presence has been well documented. Cobalt-60 has not been detected since 2003.

Shoreline Sediment - Naturally occurring radionuclides were detected at concentrations equivalent to normal background activities. There were no radionuclides attributable to the operation of Surry Power Station found in any sample.

Aquatic Biota O Fish - As expected, naturally occurring potassium-40 was detected. There were no other gamma emitting radionuclides detected in any of the fish samples.

Oysters and Clams - Other than naturally occurring potassium-40, thorium-228 and radium-226, there were no other gamma emitting radionuclides detected in any of the oyster or clam samples.

> Crabs - Naturally occurring potassium-40 was detected. No other gamma emitting radionuclides were detected.

59

REFERENCES 60

References

1. NUREG-0472, "Radiological Effluent Technical Specifications for PWRs",

Draft Rev. 3, March 1982.

2. United States Nuclear Regulatory Commission, Regulatory Guide 1.109, Rev. 1, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR50, Appendix I", October 1977.

3. United States Nuclear Regulatory Commission, Regulatory Guide 4.8, "Environmental Technical Specifications for Nuclear Power Plants",

December 1975.

4. United States Nuclear Regulatory Commission Branch Technical Position, "Acceptable Radiological Environmental Monitoring Program", Rev. 1,

,November 1979.

5. Dominion, Station Administrative Procedure, VPAP-2103S, "Offsite Dose Calculation Manual (Surry)".

6. Virginia Electric and Power Company, Surry Power Station Technical Specifications, Units 1 and 2.

7. HASL-300, Environmental Measurements Laboratory, "EML Procedures Manual," 27th Edition, Volume 1, February 1992.

8. NUREG/CR-4007, "Lower Limit of Detection: Definition and Elaboration of a Proposed Position for Radiological Effluent and Environmental Measurements," September 1984.

9. NCRP Report No. 160, "Ionizing Radiation Exposure of the Population of the United States," March 2010.

61

APPENDICES 62

APPENDIX A: LAND USE CENSUS Year 2010 63

LAND USE CENSUS*

Surry Power Station, Surry County, Virginia January 1 to December 31, 2010 Page 1 of 1 i i Nearest Nearest Nearest Nearest Sector Direction Resident Garden** I Cow Goat A N 4.1 @ 10° (a) (a) (a)

B NNE 1.9 @ 32° (a) (a) (a)

C NE 4.7 @ 350 (a) (a) (a)

D ENE (a) (a) (a) (a)

E E (a) (a) (a) (a)

F ESE (a) (a) (a) (a)

G SE 3.0 @ 1430 (a) (a) (a)

H SSE 2.7 @ 1580 (a) (a) (a)

J S 1.7@ 181° 2.0 @ 183- (a) (a)

K SSW 2.3 @ 2120 4.3 @ 193- 4.8 @ 2000 (a)

L SW 2.3 @ 2210 3.6 @ 2230 (a) (a)

M WSW 0.4 @ 2440 3.6 @ 2450 (a) (a)

N W 3.1 @ 260° 3.4 @ 2600 (a) (a)

P WNW 4.9 @2830 (a) (a) (a)

Q NW 4.6 @ 3210 (a) (a) (a)

R NNW 3.8 @ 338- 4.4 @ 334- 3.7 @ 3360 (a)

• Locations are listed by miles and degrees heading relative to true northfrom center of Unit #1 Containment.

• • Area greater than 50 m2 and contains broadleafvegetation.

(a) None 64

APPENDIX B:

SUMMARY

OF INTERLABORATORY COMPARISONS Year 2010 65

INTRODUCTION This appendix covers the Interlaboratory Comparison Program (ICP) of Teledyne Brown Engineering (TBE). TBE use QA/QC samples provided by Eckert & Ziegler Analytics, Inc., Environmental Resource Associates (ERA) and the Mixed Analyte Performance Evaluation Program (MAPEP) to monitor the, quality of analytical processing associated with the REMP. Each provider has a documented Quality Assurance program and the capability to prepare Quality Control materials traceable to the National Institute of Standards and Technology (NIST). The providers supply the samples to TBE, and upon receipt, the laboratories perform the analyses in a normal manner. The results are then reported to the provider for evaluation. The suite of QA/QC samples is designed to provide sample media and radionuclide combinations that are offered by the providers and included in the REMP and typically includes:

) milk for gamma nuclides and low-level iodine-131 analyses,

> milk for Sr-89 and Sr-90 analyses,

> water for gamma nuclides, low-level iodine- 131, and gross beta analyses,

> water for tritium, Sr-89, and Sr-90 analyses,

> cartridge for l- 131 analyses,

> air filter for gamma nuclide, gross beta, and Sr-90 analyses.

The accuracy of each result reported to Eckert & Ziegler Analytics, Inc. is measured by the ratio of the TBE result to the known value. Accuracy for all other results is based on statistically derived acceptance ranges calculated by the providers. An investigation is undertaken whenever the ratio or reported result fell outside of the acceptance range.

RESULTS The TBE ICP results are included in the following tables for the first through the fourth quarters of 2010. Two analyses did not meet the acceptance criteria. TBE initiated a non-conformance report, NCR 10-09, to document and address the analyses. The results of NCR 10-09 are as follows.

1. ERA Sample RAD-83 failed Zn-65 in water: Failure was due to a typo when entering the result into the ERA website. The reported result was entered as 11.0 pCi/L but should have been 111.0 pCi/L, which fell within the acceptance range of 91.8 - 122 pCi/L. In order to prevent recurrence of the typo, a very careful review of the entered results will be performed prior to submitting the results.

2. ERA Sample RAD-83 failed Sr-89 in water: The Sr-89 result of 77.8 pCi/L was evaluated as not acceptable based on the acceptance range of 55.8 -

76.7. The TBE to ERA ratio was 1.14 of the known value of 68.5. Since this 66

falls within 20% of the known value, TBE considers this an acceptable result. No corrective action is required.

67

ECKERT & ZIEGLER ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES (PAGE I OF 3)

Identification Reported Known Ratio (c)

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

March 2010 E6978-396 Milk Sr-89 pCi/L 89.3 92.8 0.96 A Sr-90 pCi/L 13.8 12.7 1.09 A E6979-396 Milk 1-131 pCi/L 65.2 74.0 0.88 A Ce-141 pCi/L 241 261 0.92 A Cr-51 pCi/L 388 361 1.07 A Cs-134 pCi/L 157 178 0.88 'A Cs-137 pCi/L 150 158 0.95 A Co-58 pCi/L 143 143 1.00 A Mn-54 pCi/L .202 207 0.97 A Fe-59 pCi/L 146 137 1.06 A Zn-65 pCi/L 247 254 0.97 A Co-60 pCi/L 177 183 0.97 A E6981-396 Filter Ce-141 pCi 211 185 1.14 A Cr-51 pCi 304 255 1.19 A Cs-134 pCi 142 125 1.13 A Cs-137 pCi 131 ill 1.18 A Co-58 pCi 119 101 1.18 A Mn-54 pCi 162 146 1.11 A Fe-59 pCi 110 96.8 1.14 A Zn-65 pCi 217 179 1.21 W Co-60 pCi 145 129 1.12 A E6980-396 Charcoal 1-131 pCi 80.2 85.6 0.94 A June 2010 E7132-396 Milk Sr-89 pCi/L 82.0 93.4 0.88 A Sr-90 pCi/L 15.8 16.7 0.95 A E7133-396 Milk 1-131 pCi/L 83.5 96.9 0.86 A Ce-141 pCi/L 107 110 0.97 A Cr-51 pCi/L 325 339 0.96 A Cs-134 pCi/L 114 126 0.91 A Cs-137 pCi/L 144 150 0.96 A Co-58 pCi/L 92.3 101 0.91 A Mn-54 pCi/L 165 169 0.98 A Fe-59 pCi/L 121 119 1.02 A Zn-65 pCi/L 197 206 0.96 A Co-60 pCi/L 190 197 0.97 A E7134-396 Charcoal 1-131 pCi 76.4 79.9 0.96 A Footnotes are on page 3 of 3.

68

ECKERT & ZIEGLER ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

June 2010 E7135-396 Filter Ce-141 pCi 88.4 91.6 0.97 A Cr-51 pCi 292 282 1.04 A Cs-134 pCi 101 105 0.97 A Cs-137 pCi 132 125 1.06 A Co-58 pCi 87.3 84.0 1.04 A Mn-54 pCi 150 140 1.07 A Fe-59 pCi 105 98.6 1.06 A Zn-65 pCi 168 171 0.98 A Co-60 pCi 170 163 1.04 A September 2010 E7229-396 Milk Sr-89 pCi/L 85.0 92.8 0.92 A Sr-90 pCi/L 12.6 14.7 0.86 A E7230-396 Milk 1-131 pCi/L 80.2 94.1 0.85 A Ce-141 pCi/L 130 130 1.00 A Cr-51 pCi/L 235 234 1.00 A Cs-134 pCi/L 83.2 93.0 0.91 A Cs-137 pCi/L 95.1 94.5 1.01 A Co-58 pCi/L 77.3 73.7 1.05 A Mn-54 pCi/L 121 119 0.98 A Fe-59 pCi/L 96.4 91.1 1.06 A Zn-65 pCi/L 216 204 1.06 A Co-60 pCi/L 172 171 0.97 A E7231-396 Charcoal 1-131 pCi 62.3 59.9 1.04 A E7232-396 Filter Ce-141 pCi 122 119 1.03 A Cr-51 pCi 228 214 1.07 A Cs-134 pCi 79.9 85.3 0.97 A Cs-137 pCi 93.8 86.7 1.08 A Co-58 pCi 71.5 67.6 1.06 A Mn-54 pCi 113 110 1.03 A Fe-59 pCi 73.8 83.6 0.88 A Zn-65 pCi 186 187 0.99 A Co-60 pCi 163 157 1.04 A December 2010 E7375-396 Milk Sr-89 pCi/L 92.7 98.0 0.95 A Sr-90 pCi/L 13.5 13.5 1.00 A Footnotes are on page 3 of 3.

69

ECKERT & ZIEGLER ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

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

December 2010 E7376-396 Milk 1-131 pCi/L 87.9 96.9 0.91 A Cr-51 pCi/L 389 456 0.85 A Cs-134 pCi/L 137 157 0.91 A Cs-137 pCi/L 172 186 0.92 A Co-58 pCi/L 84.3 90.2 0.93 A Mn-54 pCi/L 120 120- 0.98 A Fe-59 pCi/L 134 131 1.02 A Zn-65 pCi/L 162 174 0.93 A Co-60 pCi/L 284 301 0.97 A E7377-396 Charcoal 1-131 pCi 79.6 84.2 0.95 A E7378-396 Filter Cr-51 pCi 387 365 1.06 A Cs-134 pCi 135 126 0.97 A Cs-137 pCi 157 149 1.05 A Co-58 pCi 73.6 72.3 1.02 A Mn-54 pCi 88.7 96.0 0.92 A Fe-59 pCi 127 105 1.21 W Zn-65 pCi 151 139 1.09 A Co-60 pCi 249 241 1.03 A (a) Teledyne Brown Engineering reported result.

(b) The Eckert & Ziegler Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

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

(d) Eckert & Ziegler 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. Two consecutive Warning evaluations require an investigation. N = Not Acceptable. Reported result falls outside the ratio limits of< 0.70 and > 1.30.

70

DOE's MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES (PAGE I OF 1)

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

March 2010 10-MaW22 Water Cs-137 Bq/L 58.5 60.6 42.4 - 78.8 A Co-57 Bq/L 27.2 28.3 19.8 - 36.8 A H-3 Bq/L 104 90.8 63.6-118 A Mn-54 Bq/L 26.6 26.9 18.8 - 35.0 A Zn-65 Bq/L 42 40.7 28.5- 52.9 A Am-241 Bq/L 1.25 1.30 0.91 - 1.69 A 10-GrW22 Water Gr-Alpha Bq/L 0.5173 0.676 >0.0 - 1.352 A Gr-Beta Bq/L 3.98 3.09 1.55-4.64 A 10-RdF22 Filter Cs-134 Bq/sample 1.81 2.13 1.49-2.77 A Cs-137 Bq/sample 1.70 1.53 1.07- 1.99 A Co-60 Bq/sample 2.65 2.473 1.731 - 3.215 A Mn-54 Bq/sample 3.7 3.02 2.11 -3.93 W Sr-90 Bq/sample 0.0523 A (1) 10-GrF22 Filter Gr-Alpha Bq/sample 0.1533 0.427 >0.0 - 0.854 A Gr-Beta Bq/sample 1.240 1.29 0.65- 1.94 A August 2010 10-MaW23 Water Cs-134 Bq/L 27.1 31.4 22.0-40.8 A Cs-137 Bq/L 41.8 44.2 30.9 - 57.5 A Co-57 Bq/L 33.2 36.0 25.2 - 46.8 A Co-60 Bq/L 26.5 28.3 19.8 - 36.8 A H-3 Bq/L 500 453.4 317.4 - 589.4 A Zn-65 Bq/L 30.8 31.0 21.7-40.3 A Sr-90 Bq/L 8.1 8.3 5.8- 10.8 A Tc-99 Bq/L 36.4 33.6 23.5 - 43.7 A 10-GrW23 Water Gr-Alpha Bq/L 2.38 1.92 0.58-3.26 A Gr-Beta Bq/L 6.37 4.39 2.20 - 6.59 A 10-RdF23 Filter Cs-134 Bq/sample 2.31 2.98 2.09- 3.87 W Am-241 Bq/sample 0.125 0.115 0.081 - 0.150 A Co-57 Bq/sample 3.64 4.08 2.86 - 5.30 A Co-60 Bq/sample 2.81 2.92 2.04 - 3.80 A Mn-54 Bq/sample 3.19 3.18 2.23 - 4.13 A Sr-90 Bq/sample 1.01 1.01 0.71 - 1.31 A 10-GrF23 Filter Gr-Beta Bq/sample 0.473 0.50 0.25- 0.75 A (1) False positive test (a) Teledyne Brown Engineering reported result.

(b) The MAPEP known value is equal to 100% of the parameter present in the standard as determined bygravimetric and/or volumetric measurements made during standard preparation.

(c) DOE/MAPEP evaluation: A= Acceptable, W = Acceptable with warning. Two consecutive Warning evaluations require an investigation. N = Not Acceptable 71

ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE QC SPIKE PROGRAM TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES (PAGE 1 OF 1)

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

April 2010 RAD 81 Water Sr-89 pCi/L 64.4 60.4 48.6 - 68.2 A Sr-90 pCi/L 37.8 41.3 30.4 - 47.4 A Ba-133 pCi/L. 66.4 *65.9 54.9- 72.5 A Cs-134 pCi/L 66.43 71.6 58.4 - 78.8 A Cs-137 pCi/L 137.33 146 131 - 163 A Co-60 pCi/L 83.33 84.5 76.0 - 95.3 A Zn-65 pCi/L 177 186 167-219 A Gr-Alpha pCi/L 26.37 32.9 16.9-42.6 A Gr-Beta pCi/L 28.77 37.5 24.7 -45.0 A 1-131 pCi/L 26.27 26.4 21.9-31.1 A H-3 pCi/L 12967 12400 10800 - 13600 A October 2010 RAD 83 Water Sr-89 pCi/L 77.8 68.5 55.8- 76.7 NA(1)

Sr-90 pCi/L 39.3 43.0 31.7-49.3 A Ba-133 pCi/L 70.3 68.9 57.5- 75.8 A Cs-134 pCi/L 39.3 43.2 34.5-47.5 A Cs-137 pCi/L 117 123 111 -138 A Co-60 pCi/L 53.50 53.4 48.1 -61.3 A Zn-65 pCi/L 11 102 91.8- 122 NA(2)

Gr-Alpha pCi/L 35.10 42.3 21.9-53.7 A Gr-Beta pCi/L 35.5 36.6 24.0 - 44.2 A 1-131 pCi/L 27.9 27.5 22.9-32.3 A H-3 pCi/L 13233 12900 11200 - 14200 A (1) Sr-89 TBE to known ratio of 1.14 fell within acceptable range of +/- 20%. No action required. NCR 10-09 (2) Zn-65 resultof 111 was incorrectly reported as 11.0. No action required. NCR 10-09 (a) Teledyne Brown Engineering reported result.

(b) The ERA known value is equal to 100% of the parameter present in the standard as determined bygravimetric and/or volumetric measurements made during standard preparation.

(c) ERA evaluation: A= Acceptable. Reported result falls within the Warning Limits. NA= Not Acceptable. Reported result falls outside of the Control Limits. CE = Check for Error. Result falls within the Control Limits and outside of the Warning Limit.

72