ML11137A172

Independent Spent Fuel Storage Installation, Annual Radiological Environmental Operating Report for 2010

ML11137A172
Person / Time
Site:	Calvert Cliffs
Issue date:	05/13/2011
From:	Lauver D E Constellation Energy Group, Constellation Energy Nuclear Group, EDF Development
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
Download: ML11137A172 (93)

Text

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 CENG.M a joint venture of Constellation

'-J~eDF May 13, 2011 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:

SUBJECT:

Document Control Desk Calvert Cliffs Nuclear Power Plant; Unit Nos. 1 & 2; Docket Nos. 50-317 & 50-318 Independent Spent Fuel Storage Installation; Docket No. 72-8 Annual Radiological Environmental Operating Report

REFERENCES:

(a) Calvert Cliffs Nuclear Power Plant Technical Specification 5.6.2 (b) Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specification 6.2 In accordance with References (a) and (b), Calvert Cliffs Nuclear Power Plant is submitting the Annual Radiological Environmental Operating Report, for the calendar year 2010 (Attachment 1).Should you have questions regarding this matter, please contact me at (410) 495-5219 or Ms. Brenda Nuse at (410) 495-4913.Very truly yours, Douglas E. Lauver Director-Licensing DEL/PSF/bjd

Attachment:

(1) Annual Radiological Environmental Operating Report for the Calvert Cliffs Nuclear Power Plant Units 1 and 2 and the Independent Spent Fuel Storage Installation cc: D. V. Pickett, NRC W. M. Dean, NRC Resident Inspector, NRC S. Gray, DNR R. Manley, MDE 12S[~ &~k~S59~

ATTACHMENT (1)ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1 AND 2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION Calvert Cliffs Nuclear Power Plant, LLC May 13, 2011 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1 AND 2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION January 1 -December 31, 2010 A. M. Barnett B. D. Nuse CONSTELLATION ENERGY CONSTELLATION ENERGY NUCLEAR GROUP, LLC APRIL 2011 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS L IST O F F IG U R E S ............................................................................................................................

ii L IST O F T A B L E S .............................................................................................................................

iii I. SU M M A R Y .......................................................................................................................................

I II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM .......................................................

3 II.A .INTRO DUCTIO N .................................................................................................................................................

3 II.B. PRO G RA M ............................................................................................................................................................

3 II.B.1O bjectives

.........................................................................................................................................................

3 II.B.2Sam ple Collection

............................................................................................................................................

4 II.B3.3 D ata Interpretation

.......................................................................................................................................

4 II.B.4 Pro aram Exceptions

......................................................................................................................................

4 II.C. RESU LTS A ND DISCU SSIO N S ..........................................................................................................................

4 II.C.1 Aquatic Environm ent ....................................................................................................................................

4.C.l.a Bay W ater ...................................................................................................................................................

4 II.C.1.b Aquatic O r anism s .....................................................................................................................................

5 II.C. .c Shoreline Sedim ent .....................................................................................................................................

5 II.C.2 Atm ospheric Environm ent ...........................................................................................................................

8.C.2.a Air Particulate Filters ................................................................................................................................

8 II.C.2.b A ir Iodine ....................................................................................................................................................

8 II.C.3 Terrestrial Environm ent ..............................................................................................................................

8 II.C.3.a Ve ietation .................................................................................................................................................

10 II.C.4 Direct Radiation

..........................................................................................................................................

10 II.D. CO NCLUSIO N ....................................................................................................................................................

12 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM .....................................................

18 III.A. INTRO DUCTIO N ..............................................................................................................................................

18 III.B. PRO G RA M .........................................................................................................................................................

18 III.B .1 O bjectives

...................................................................................................................................................

18 III.B.2 Sam ple Collection

......................................................................................................................................

19 III.B3.3 Data Interpretation

....................................................................................................................................

19 III.B.4 Pro Eram Exceptions

..................................................................................................................................

19 III.C. RESULTS AN D DISC USSIO NS ......................................................................................................................

19 III.C.I Atm ospheric Environm ent ...............................................................................................................

19 III.C.l.a Air Particulate Filters .............................................................................................................................

19 I1I.C.2 Terrestrial Environm ent ...........................................................................................................................

20 III.C.2.a Ve eetation ................................................................................................................................................

20 III.C.2.b Soils ..........................................................................................................................................................

20 III.C.3 Direct Radiation

.........................................................................................................................................

21 III.D .CO NC LUSIO N ..................................................................................................................................................

21 IV .RE FE RE N C E S ............................................................................................................................

25 APPENDIX A Sample Locations for the REMP and the ISFSI .............................................

26 APPENDIX B Analysis Results for the REMP and the ISFSI .................................................

35 APPENDIX C Quality Assurance Pro2ram .............................................................................

56 A PP E N D IX D L and U se Survey .................................................................................................

68 APPENDIX E Additional Samples and Analysis Results ..................................

69 i January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 LIST OF FIGURES Figure Title Page 1 Tritium in Chesapeake Bay W ater .......................................................................................

6 2 Silver-i 10m and Potassium-40 in Chesapeake Bay Oysters ..............................................

7 3 Nuclear Fallout in the Calvert Cliffs Area ...........................................................................

9 4 Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant ..........................................

11 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations

..............

14 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition

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15 7 M ean TLD Gam m a Dose, ISFSI .......................................................................................

22 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs N uclear Pow er Plant ..........................................................................................................

29 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles ..................................

30 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ................................

31 A-4 Independent Spent Fuel Storage Installation Sampling Locations

.....................................

33 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations

........ 34 E-1 Site M ap Ground W ater M onitoring W ells ........................................................................

86 Hi January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES Table Title Page I Synopsis of 2010 Calvert Cliffs Nuclear Power Plant Radiological Environmental M onitoring Program ............................................................................................................

16 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Plant U n its I an d 2 ...........................................................................................................................

17 3 Synopsis of 2010 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program ..........................................

23 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation

.............................................................

24 A-i Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..28 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at C alvert C liffs ..............................................................................................

32 B-i Concentration of Tritium and Gamma Emitters in Bay Water ..........................................

37 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ..........................................

38 B-3 Concentration of Gamma Emitters in Oyster Samples ......................................................

39 B-4 Concentration of Gamma Emitters in Shoreline Sediment .................................................

40 B-5 Concentration of Iodine-131 in Filtered Air ......................................................................

41 B-6 Concentration of Beta Emitters in Air Particulates

.............................................................

43 B-7 Concentration of Gamma Emitters in Air Particulates

.....................................................

47 B-8a Concentration of Gamma Emitters in Vegetation Samples ..............................................

48 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI ..... 49 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 50 B-10 Typical MDA Ranges for Gamma Spectrometry

...............................................................

51 B-i I Typical LLDs for Gamma Spectrometry

...........................................................................

52 B -12 D irect R adiation .......................................................................................................................

53 C-1 Results of Participation in Cross Check Programs .............................................................

58 C-2 Results of Quality Assurance Program .............................................................................

61 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry

......................

67 D -I L and U se Survey ......................................................................................................................

68 E-I Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear P ow er P lant ..............................................................................................................................

7 1 E-2 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environm ental M onitoring Program ..................................................................................

72 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units I & 2 Non-Tech Spec Radiological Environmental Monitoring Program ............................................................

73 E-4 Concentration of Gamma Emitters in Bottom Sediment ...................................................

74 E-5 Concentration of Iodine-131 in Filtered Air ......................................................................

75 E-6 Concentration of Beta Emitters in Air Particulates

............................................................

77 iii January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES -Continued Table Title Page E-7 Concentration of Gamma Emitters in Air Particulates

......................................................

79 E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water ..................

80 E-9 Direct Radiation as Measured in Pressurized Ion Chamber ...............................................

81 E-10 D irect R adiation ..............................................................................................................

82 E- 11 Direct Radiation from Resin Storage Area .........................................................................

83 E- 12 Concentration of Tritium in Groundwater

.........................................................................

84 E-13 Gross Concentration of Gamma Emitters ...........................................................................

85 iv January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 I.

SUMMARY

During this operating period for Calvert Cliffs Nuclear Power Plant (CCNPP) Units 1 and 2, a total of 3483 radiological analyses were performed and the analytical results reviewed.

Most of these analyses were performed to satisfy the requirements of the Offsite Dose Calculation Manual (ODCM) (Ref. 6) and the Environmental and Independent Spent Fuel Storage Installation (ISFSI) Technical Specifications (Ref. 10). Some of these samples, although not required by either the ODCM or the Technical Specifications, were collected to maintain our commitments to the surrounding community and to maintain historical continuity of the CCNPP Radiological Environmental Monitoring Program (REMP) that started in 1970. The entire monitoring program in place around CCNPP is divided into three parts: the original REMP, the ISFSI monitoring program, and the Non-ODCM Radiological Environmental Monitoring.

The following paragraphs describe each of these parts in more detail.A total of 651 radiochemical analyses were performed on 583 environmental samples and 540 thermoluminescent dosimeters (TLDs) were analyzed for ambient radiation exposure rates as part of the original REMP. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the Environmental Technical Specifications (Ref. 5).For the ISFSI monitoring program, 348 radiochemical analyses were performed on 300 environmental samples, 52 of which were in common with the original REMP. In addition, 480 TLDs, 24 in common with the original REMP, were analyzed for ambient radiation exposure rates. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the ISFSI Technical Specifications (Ref. 10).In addition, 580 analyses were performed on 632 additional environmental samples, and 480 additional TLDs were analyzed for ambient radiation exposure rates. Also, six pressurized ion chambers continuously monitored the environs around the plant for ambient radiation levels resulting in 72 monthly measurements.

As mentioned earlier, these additional analyses reflect a commitment to maintain historical continuity for samples and sampling pathways discontinued from the program when the Environmental Technical Specifications were changed in March 1985 and to satisfy monitoring commitments made to the surrounding community.

And lastly, 200 radiochemical analyses were performed on 200 quality assurance samples and 132 quality assurance TLDs were analyzed as part of an internal and external quality assurance program associated with Teledyne Brown Engineering.

Laboratory intercomparison samples obtained from Environmental Resource Associates (ERA) and Analytics' Inc. were also analyzed.Samples collected from the aquatic environment included bay water, fish, oysters, and shoreline sediment.

Bay water was analyzed for tritium and gamma emitters.

Fish, oysters, and shoreline sediments were analyzed for gamma emitting radionuclides.

I January 1 -December 31, 2010 Docket Nos. 50-317/50-3 18/72-8 Monitoring the atmospheric environment involved sampling the air at various locations sur-rounding CCNPP and the ISFSI. Air particulates and gaseous iodine were collected on glass fiber filters, charcoal and silver zeolite molecular sieve cartridges, respectively.

The particulate filters were analyzed for beta activity and gamma emitting nuclides.

The charcoal and molecular sieve cartridges were analyzed for airborne gaseous radioiodine.

Samples from the terrestrial environment consisted of vegetation and soil samples collected and analyzed for gamma emitters.

Vegetation samples for the original REMP were also analyzed for 1-131.Measurements of direct radiation, as required by the ODCM, were performed by analyzing TLDs from forty locations surrounding CCNPP and the ISFSI.Natural radioactivity was detected in essentially all 3483 radiological analyses performed.

Low levels of man-made fission products were also observed in 20 of these analyses.

All of these observations were attributed to fallout from past atmospheric weapons testing. Detailed discussions about the results of these analyses are contained in the body of this report.To assess the plant's contribution to the radiation levels of the ambient environment, dose calculations were performed using the plant's effluent release data, on-site meteorological data, and appropriate pathways.

The results of these dose calculations indicate: a. a maximum thyroid dose of 1.60 x 10-2 mrem via liquid and gaseous pathways, which is less than 0.1% of the acceptable limit of 75 mrem/yr as specified in 40CFR 190;b. a maximum whole body dose of 1.47 x 10-3 mrem via liquid and gaseous pathways, which is less than 0.02% of the acceptable limit of 25 mrem/yr as specified in 40CFR 190;c. a maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 1.48 x 10-3 mrem to GI-Tract.

This dose is less than 0.06% of the allowable limit of 25 mrem/yr as specified in 40CFRI90.Thus, it is concluded based upon the levels of radioactivity observed and the various dose calculations performed, that CCNPP Units I and 2 and the ISFSI did not cause any significant radiological impact on the surrounding environment.

2 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM II.A. INTRODUCTION Constellation Energy (CE), previously known as Baltimore Gas and Electric Company (BGE), has been conducting a REMP in the environs of the CCNPP since the summer of 1970. The Calvert Cliffs site is an operating nuclear generating station consisting of two pressurized water reactors.

Unit 1 achieved criticality on October 7, 1974 and commenced commercial operation in May 1975. Unit 2 achieved criticality on November 30, 1976 and went into commercial operation April 1, 1977. The location of the plant in relation to local metropolitan areas is shown on Figure A-1.Results of the monitoring program for the pre-operational period have been reported in a series of documents (Ref. 1-4). The results from previous operational periods are contained in annual reports submitted to the NRC as required.Results of the monitoring program for the current operational period are included in this report.The report presents the content of the REMP (Table 1), the sampling locations (Appendix A), the summary of the analytical results (Table 2), a compilation of the analytical data (Appendix B), the results of the Analytics Intercomparison Program and the Quality Assurance Program (Appendix C), the results of the Land Use Survey (Appendix D), and a compilation of the analytical data for extra samples collected (Appendix E). Interpretation of the data and conclusions are presented in the body of the report.The environmental surveillance data collected during this reporting period were compared with that generated in previous periods whenever possible to evaluate the environmental radiological impact of CCNPP Units 1 and 2.I.B. PROGRAM II.B.1 Objectives The objectives of the REMP for the Calvert Cliffs Nuclear Power Plant are: a. To verify that radioactivity and ambient radiation levels attributable to plant operation are within the limits specified in the ODCM (Ref. 6) and the Environmental Radiation Protection Standards as stated in 40 CFR Part 190, b. To detect any measurable buildup of long-lived radionuclides in the environment, c. To monitor and evaluate ambient radiation levels, d. To determine whether any statistically significant increase occurs in the con-centration of radionuclides in important pathways.3 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 II.B.2 Sample Collection The locations of the individual sampling stations are listed in Table A-I and shown in Figures A-2 and A-3. All samples were collected by contractors to, or personnel of Constellation Energy according to CCNPP Procedures (Ref. 7,12,13).II.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value.II.B.4 Program Exceptions There were no program exceptions during this operating period.I.C. RESULTS AND DISCUSSIONS All the environmental samples collected during the year were analyzed using Constellation Energy laboratory procedures (Ref. 8). The analytical results for this reporting period are presented in Appendix B and are also summarized in Table 2. For discussion, the analytical results are divided into four categories.

The categories are the Aquatic Environment, the Atmospheric Environment, the Terrestrial Environment, and Direct Radiation.

These categories are further divided into subcategories according to sample type (e.g., Bay Water, Aquatic Organisms, etc., for the Aquatic Environment).

II.C.1 Aquatic Environment The aquatic environment surrounding the plant was monitored by analyzing samples of bay water, aquatic organisms, and shoreline sediment.

These samples were obtained from various sampling locations on the Chesapeake Bay near the plant.I.C.l.a Bay Water Monthly bay water samples were taken from two locations during the year. These locations are the Intake Area (sample code Wal) and the Discharge Area (sample code Wa2). Composite samples were obtained from each location for the entire sampling period. These samples were analyzed for tritium and gamma emitters.The tritium analyses performed on quarterly composites of the monthly bay water samples showed the presence of tritium in the WAI Intake Area sample at 294 +/- 174 pCi/L for Quarter 3 and in the Discharge (WA2) samples in all four quarters.

The detectable concentrations observed in the WA2 Discharge Area samples ranged from 298 +/- 43 pCi/L to 494 +/- 174 pCi/L, which is similar to the ranges observed in previous years.4 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure 1 compares tritium observed in the plant discharge and intake with annual effluent releases as reported in the Radioactive Effluent Release Report.Monthly analyses of bay water samples from both locations for gamma emitters exhibited no detectable concentrations of any plant-related radionuclides.

II.C.l.b Aquatic Organisms Twelve samples of aquatic organisms were obtained from four locations during the year.Samples of fish, when in season, are normally collected from the Discharge Area (sample codes lal and Ia2) and from the Patuxent River (sample codes Ia4 and la5). As shown in Table B-2, two species of fish were sampled at both the plant discharge and the control point in the Patuxent River. Oyster samples were obtained quarterly from Camp Conoy (sample code Ia3) and Kenwood Beach (1a6).Edible portion of the fish and oyster samples were analyzed for gamma emitters.

Gamma spectrometric analyses of the fish exhibited naturally occurring K-40, but no detectable concentrations of any plant-related radionuclides.

Oyster samples likewise exhibited naturally occurring K-40, but no detectable concentrations of any plant related radionuclides.

II.C.I.e Shoreline Sediment Semiannual shoreline sediment samples were taken from one location during the year. This location is Shoreline at Barge Road (sample code Wbl). The samples obtained from this location were analyzed for gamma emitters.Gamma spectrometric analyses of these samples exhibited naturally occurring radionuclides, but no detectable concentration of any plant-related radionuclides.

5 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 FIGURE 1 Tritium in Chesapeake Bay Water 1900 1000-~800.WE 600-*1 400 C 0..............

..... ..... ... N 1 C 8 2000 1800 1600 1400 1200-1000-800 600-400 200 0J 2000-. 1800-S1600-~1400-1200-C 0 800-1 600-Q)20 nýJiIllIIIII I I i I [1, 1, a 1 lii. 1 I.................I ..............P rz P 0-0 83 2 ý0_ 2 -0 2 69 [.ý ý R -0 2 8 6 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 FIGURE 2 Silver-110m and Potassium-40 in Chesapeake Bay Oysters-1 E 0 0.18-0.16.0.14-0.12 0.1.0.08 0.06 0.04 0.02 111_ ___0 _ ,p ,. 4I .I I = t .I1. 11 ,Illll i .N-P-8 0 8 Sl a 8 8 8 9 8 8 7000 6000 0 C' 5000-0 0 0 4000o.3000.2000, 0'- 1000-E C ( no .NI Jh CD 0 C0 00 C 0 Cq C0< r- r- C- 00 co co co C ( 0) 0) 0C , OD C0 0 0 0 0 -C (L-C hhbkI 7 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 II.C.2 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters, charcoal and silver zeolite cartridges (for trapping radioiodine species).

These samples were collected from five locations surrounding the plant. These locations are On Site before the Entrance to Camp Conoy (sample code Al), Camp Conoy Road at the Emergency Siren (sample code A2), Bay Breeze Road (sample code A3), Route 765 at Lusby (sample code A4), and at the Emergency Operations Facility (sample code A5).II.C.2.a Air Particulate Filters Weekly composite air particulate filter samples were collected from the five locations during the year. These samples were analyzed for beta activity and gamma emitters.Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic of background levels. The values ranged from 0.7 x 10-2 to 4.5 x 10-2 pCi/m3 for the indicator locations and 0.9 x 10-2 to 4.1 x 10-2 pCi/m3 at the control lo-cation. The location with the highest overall mean of 2.3 x10-2 pCi/m3 was A4, Lusby.Gamma spectrometric analyses of monthly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.Figure 3 depicts the historical trends of beta activity.II.C.2.b Air Iodine Weekly composited charcoal and silver zeolite cartridges (for trapping radioiodine species) were collected from the five locations during the year. These samples were analyzed for radioiodine species.Weekly radioiodine analyses of charcoal and silver zeolite cartridges collected from all five locations exhibited no detectable concentrations of 1-131.Figure 3 depicts the historical trends of radioiodine.

II.C.3 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation collected monthly, when available, from various sampling locations near the plant during the normal growing season.8 January I -December 31, 2010 Docket Nos. 50-317/50-318/72-8 FIGURE 3 Nuclear Fallout in the Calvert Cliffs Area SURFACE AIR VAPORS, LUSBY, MD (A4)250 -r ATMOSPHERIC FALLOUT P (y)200 150.100 50-I II&1 8 2 93 5? S1 Is 8 8 8 8 Is 8 8 9 N-1200 (I 1000-800 600-400-200-ATMOSPHERIC FALLOUT From weapons testing ATMOSPHERIC FALLOUT From weapons testing ATMOSP FEI FALLOUT From Che roy T.mobyl* l *I -I .-I-I P rz P

• 2 2 t 2 F 2 8 6i , i C

• 8 8 i 8, 9 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 II.C.3.a Vegetation Vegetation samples were collected from three locations during the year. These locations are Garden Plot off Bay Breeze Road (sample codes IbI, Ib2, and Ib3), On Site before the Entrance to Camp Conoy (sample codes Ib4, Ib5, and Ib6), and the Emergency Operations Facility (sample codes Ib7, Mb8, and Mb9). These samples were analyzed for gamma emitters, including analyses for 1-13 1.All samples showed detectable amounts of naturally occurring K-40 and Be-7. No plant related radionuclides were found in any of these samples.II.C.4 Direct Radiation Direct radiation is measured by a network of TLDs in each overland sector surrounding the Plant both at the plant boundary and at 4 miles from the Plant.TLDs were collected quarterly from twenty-three locations surrounding the plant. The twenty indicator locations are On Site Along the Cliffs (sample code DRI), Route 765 Auto Dump (sample code DR2), Giovanni's Tavern (sample code DR3), Route 765 across from White Sands (sample code DR4), John's Creek (sample code DR5), Lusby (sample code DR6), On Site before the Entrance to Camp Conoy (sample code DR7), On Site at Emergency Siren (sample code DR8), Bay Breeze Road (sample code DR9), Decatur and Calvert Beach Roads (sample code DRI 0), Dirt Road off Mackall and Parran Roads (sample code DRI 1), Mackall and Bowen Roads (sample code DR12), Wallville (sample code DR13), Rodney Point (sample code DR14), Mill Bridge and Turner Roads (sample code DRI 5), Appeal School (sample code DRI 6), Cove Point and Little Cove Point Roads (sample code DR17), Cove Point (sample code DRI 8), Long Beach (sample code DR19), and On Site Near Shore (sample code DR20). The three control locations are the Emergency Operations Facility (sample code DR2 1), Solomons Island (sample code DR22), and Taylors Island, Anderson's Property (sample code DR23).The mean 90 day ambient radiation measured at the indicator locations was 11.47 mR and ranged from 8.69 to 15.41 mR as reported in Table 2. The control locations showed a 90 day mean of 13.32 mR with ranges from 10.93 to 17.35 mR. The location with the highest overall mean of 15.85 was DR23, Taylors Island, which ranged from 14.49 to 17.35 mR. A comparison of the means and ranges of the current TLD data with those of both the historical data and the regional data shows no plant-related contribution to the measured direct radiation exposure.Figure 4 shows the historical comparison of the average monthly radiation levels per calendar year for TLDs on site, at four miles, and at the control locations.

10 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 FIGURE 4 Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant 6.5.4.3.-4 Miles (DR10-18)Control Locations (DR21-23)--On-Site (DRi, 7, 8, )CD 0 E 2 1 0 M 0 r- 0) M '0 N- 0) M 'O P, 0) C(n V0 p, a)fN- r- I- r- 0) 00 C 00 0) 0) 0) 0) 0) 0) 0 0 0 0 0)11 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 II.D. CONCLUSION No man-made fission or activation by-products attributable to plant operations were observed in the environment surrounding the plant during the year.Historical trends for tritium in bay water, Ag- I1Oim and K-40 in oyster samples, nuclear fallout in the Calvert Cliffs area, and TLD data are depicted in Figures 1 through 4. As can be seen from these figures, the plant made no adverse radiological contributions to the surrounding environment.

To assess the plant's contribution to the ambient radiation levels of the surrounding environment, dose calculations were performed using the plant's effluent release data, on site meteorological data (see X/Q and D/Q values presented in Figures 5 and 6), and appropriate pathways.

The results of these dose calculations indicate: Gaseous Pathways A maximum thyroid dose of 1.50 x 10-2 mrem to a child via the plume, ground, vegetable, meat, and inhalation pathways at 2.1 km S of the containments at Calvert Cliffs. This is less than 0.1%of the acceptable limit of 75 mremlyr as specified in 40CFR1 90, "Environmental Radiation Protection Standards for Nuclear Power Operations." A maximum whole body gamma dose of 4.4 x 10-4 mrem to a child at 2.1 km SE of the containments at Calvert Cliffs. This is less than 0.02% of the acceptable dose limit of 25 mrem/yr as specified in 40CFR190.A maximum dose to any other organ, in this case the skin, of 2.2 x 10-3 mrem to an adult at 1.8 km SSW of the containments at Calvert Cliffs. This is less than 0.05% of the acceptable dose limit of 25 mrem/yr as specified in 40CFR190.Liquid Pathways A maximum thyroid dose of 1.0 x 10-3 mrem to an adult for all liquid pathways, which is less than 0.002% of the acceptable dose limit of 75 mrem/yr as specified in 40CFR190.A maximum whole body dose of 1.03 x 10-3 mrem to an adult via all liquid pathways, which is less than 0.01% of the acceptable dose limit of 25 mrem/yr as stated in 40CFR190.A maximum dose to any other organ, in this case GI Tract, of 1.06 x 10-3 mR to a child for all pathways, which is less than 0.02% of the acceptable dose limit of 25 mrem/yr specified in 40CFR190.12 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Gaseous and Liquid Pathways Combined A maximum thyroid dose of 1.6 x 10-2 mrem via liquid and gaseous pathways, which is less than 0.1% of the acceptable limit of 75 mrem/yr as specified in 40CFR190;A maximum whole body dose of 1.47 x 10-3 mrem via liquid and gaseous pathways, which is less than 0.02% of the acceptable limit of 25 mremlyr as specified in 40CFR1 90;A maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 1.48 x 10-2 mrem to the GI Tract. This dose was less than 0.06% of the allowable limit of 25 mrem/yr as specified in 40CFR190.In all cases, the calculated doses are a small fraction of the applicable limits specified in 40 CFR Part 190.Therefore, it is concluded that the operation of Calvert Cliffs Units I and 2 produced radioactivity and ambient radiation levels significantly below the limits of the ODCM and 40 CFR Part 190, and there was no significant buildup of plant-related radionuclides in the environment due to the operation of the CCNPP.13 January I -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations SITE: CALUERT CLIFFS TITLE: TIME INTEGRATED ELEUATED AUERAGE!ERIOD:8686.,8 HOUR INTEGRRTIODNRELER5E MlDELt TIME INTEGRATED STRAIGHT LINE START DOSE INTEGRATION 01/01/10 01!800 END DOSE INTEGRATION 12/31/10 24800 CONTOUR X/O LEGEND (SEC/IM34.DE-Ot 2 2.BE- -? 4 .OE-87 3 1.g E-17-2.BE-07 4 ?7.E-09-1l.0E-07 5 4. CEE-89-7.E-08 E 2. E-g -4. E-08? 1.,11-:-2.0E-08 8 ?,0E-0g-1.0E-O8 14 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition SITE: CALUERT CLIFF5 82/2s/11 t6:s3 TITLE: TIME INTEGRATED DEPOSITION D/Q rLKiUU:zb~b.0 IlUUK irlILbKHlIUrl;fKLtfLt ruJD,,.e4 MODEL! TIME INTEGRATED STRAIGHT LINE S7AR DBOSE INTEGRATION!

01/01/10 01!00 END DOSE INIEGRATION!

12/31/10 24!00 CONTOUR O/0 LECEND (1/M2, 4. BE -519.S2.8E- -4.SE-09 U 1 E-l9-1.FE-09

4. 4IE-16-? ? OE-10 G C.AE 10 4.OE 10 i.SC 15 2.0c 10 7.6E 11 1.0r" 10 4.SE 11 ?.or 11 1@1 2.SE 11 4.0- 11 15 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table 1 Synopsis of 2010 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number Frequency 1 Locations Collected Frequency' Analyzed Aquatic Environment Bay Water MC 2 24 Gamma MC 24 QC 2 8 H3 QC 8 Fish 2 A 4 4 Gamma A 4 Oysters Q 2 8 Gamma Q 8 Shoreline Sediment SA 1 2 Gamma SA 2 Atmospheric Environment Air Iodine 3 W 5 259 1-131 W 259 Air Particulates 4 W 5 259 Gross Beta W 259 Gamma MC 60 Direct Radiation Ambient Radiation Q 23 540 TLD Q 540 Terrestrial Environment Vegetation 5 M 3 27 Gamma M 27' W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 Once in Season, July through September The collection device contains silver Zeolite 4 Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples Monthly during growing season when available 16 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analyses Performed Lower Limit of Detection (LLD)Indicator Locations Mean (F)/Range 1 Location with Highest Annual Mean Name/Distance

&Direction 2 Highest Annual Mean (F) / Range 1 Control Locations Mean (F)/Range Aquatic Environment41(/)

Bay Water (pCi/L)H-3 202 15 417 (4/4)(298-494)14 (1/4)Intake Vicinity WA2 0.2 km NNE Camp Conoy IA3 0.9 km E 417 (4/4)(298-494)294 (1/4)(294)Oysters (pCi/kg)Gamma (8)Cs-1 37 14 (1/4)Atmospheric Environment Air Particulates (10-2 pCi/m 3)Direct Radiation Ambient Radiation (mR/90 days)Gross Beta (254)0.5 2.1 (207/208)(0.7-4.5)Route 765 at Lusby A4 2.9 km SSW 2.3 (52/52)(0.9-4.0)2.2 (51/52)(0.9-4.1)TLD (540)11.47 (474/474)(8.69-15.41)

Taylors Island DR23 12.6 km ENE 15.85 (24/24)(14.49-17.35) 13.32 (66/66)(10.93-17.35) 1 Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses 2 There was no detectable activity at the control location, IA6 17 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM III.A. INTRODUCTION In August 1990 BGE initiated a program of additional radiological environmental monitoring around the site for the Independent Spent Fuel Storage Installation (ISFSI). The first dry fuel storage canister was loaded into the ISFSI in November of 1993, with more canisters being loaded in subsequent years. During this operating period, three additional canisters of spent fuel were transferred to the ISFSI. The area was also used as a temporary storage area for additional radioactive material.Results of the monitoring program for the ISFSI for the current period are included in this report.This report presents the content of the ISFSI REMP (Table 3), the ISFSI sampling locations (Appendix A), the summary of the analytical results of the period (Table 4), and a compilation of the analytical data for the period (Appendix B). Interpretation of the data and conclusions are presented in the body of the report.The ISFSI monitoring program is as described in this section of the report. Pressurized Ion Chambers (PICs), because they duplicate direct surveillance by TLDs and because they experience problems with reliability, were excluded from the Technical Specification portion of the ISFSI monitoring program. PIC results, however, are given in Table E-9 and will continue to be Non-ODCM surveillance.

The results were compared with that generated during the previous ISFSI pre-operational periods (Ref. 11) and the current and previous CCNPP REMP periods. These comparisons show little deviations from these periods and are very close to the natural background levels for the region with the exception of TLDs around the north end of the ISFSI. More detailed discussions of these results are given in Section III. C.III.B. PROGRAM III.B.1 Obectives The objectives of the radiological environmental monitoring program for the ISFSI are: a. To satisfy the community concern regarding the impact of the ISFSI on the environment, b. To verify that radioactivity and ambient radiation levels attributable to operation of the ISFSI are within the limits specified in the Environmental Radiation Protection Standards as stated in 40 CFR Part 190, 18 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8

c. To detect any measurable buildup of long-lived radionuclides in the environment due to the ISFSI, d. To monitor and evaluate ambient radiation levels around the ISFSI, e. To determine whether any statistically significant increase occurs in the concentration of radionuclides near the ISFSI.III.B.2 Sample Collection The locations of the individual sampling sites are listed in Table A-2 and shown in Figures A-4 and A-5. All samples were collected by contractors to, or personnel of, Constellation Energy personnel according to Constellation Energy Laboratory Procedures (Ref. 8).III.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value.III.B.4 Program Exceptions There were no program exceptions during this operating period III.C. RESULTS AND DISCUSSIONS All the environmental samples collected were analyzed using Constellation Energy laboratory procedures (Ref. 8). The analytical results for this reporting period are presented in Appendix B and are also summarized for the period in Table 4. For discussion, the analytical results are divided into three categories.

The categories are the Atmospheric Environment, the Terrestrial Environment, and Direct Radiation.

These categories are further divided into subcategories according to sample type (e.g., Vegetation and Soil for Terrestrial Environment).

III.C.1 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters. These samples were collected from five locations surrounding the ISFSI.No source of airborne radioiodine exists for the ISFSI. Airborne radioiodine is, therefore, not considered in assessing the radiological impact of the ISFSI.III.C.l.a Air Particulate Filters Weekly composite air particulate filter samples were collected from five locations during the period. These locations are On Site before the Entrance to Camp Conoy (sample code Al; in common with the CCNPP REMP), Meteorological Station (SFA 1), CCNPP Visitor's Center 19 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 (SFA2), NNW of the ISFSI (SFA3), and SSE of the ISFSI (SFA4). These samples were an-alyzed for beta radioactivity and gamma emitting radionuclides.

Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic of levels routinely observed in the REMP. These values ranged from 0.7 x 10-2 to 7.4 x 10-2 pCi/m 3 for the indicator locations and 0.8 x 10-2 to 4.1 x 10-2 pCi/m 3 for the control location.

The location with the highest overall mean of 2.4 x 10-2 pCi/m 3 was SFA1, MET Station.Gamma spectrometric analyses of monthly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.III.C.2 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation and soil collected quarterly from the vicinity of the air sampling locations for the ISFSI.III.C.2.a Vezetation Vegetation samples were collected quarterly from five locations during the year. These locations are: Meteorological Station (sample code SFbl), CCNPP Visitor's Center (sample code SFb2), NNW of the ISFSI (sample code SFb3), SSE of the ISFSI (sample code SFb4), and On Site before the Entrance to Camp Conoy (sample code SFb5). These samples were analyzed for gamma emitters.No detectable concentration of plant-related radionuclides were found in any of these samples.Naturally occurring radionuclides such as K-40 were detected in all samples.III.C.2.b Soils Soil samples were collected quarterly from five locations surrounding the ISFSI in the vicinity of the air samplers.

These locations are: Meteorological Station (sample code SFS 1), CCNPP Visitor's Center (sample code SFS2), NNW of the ISFSI (sample code SFS3), SSE of the ISFSI (sample code SFS4), and On Site before the Entrance to Camp Conoy (sample code SFS5).Soil samples were analyzed for gamma emitting radionuclides.

Cesium-137 was detected in twelve quarterly samples from both indicator and control locations.

The Cs-137 concentrations ranged from 41 + 31 to 498 + 57 pCi/kg. While the presence of Cs-137 in these samples may be plant-related, this range is consistent with that found to be due to the residual fallout from past atmospheric nuclear weapons testing. The activities of this radionuclide are well below the federal limits established in 40 CFR Part 190, "Environmental Radiation Protection Standards for Nuclear Power Operations" and are comparable to those observed in previous annual reporting periods for the CCNPP REMP and in the earlier pre-operational data for the ISFSI.No other detectable concentrations of plant-related radionuclides were found in any of these samples. Naturally occurring radionuclides such as K-40, were also detected in all these samples.20 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 III.C.3 Direct Radiation Direct radiation is measured by a network of TLDs surrounding the ISFSI. These TLDs are collected quarterly from nineteen locations surrounding the ISFSI, plus one control TLD location at the Visitor's Center (sample code SFDR7). The locations include On Site before the Entrance to Camp Conoy (sample code DR7, common to both the CCNPP Program and the ISFSI Program) and the Meteorological Station (sample code DR30, previously a location maintained for historical continuity.)

The other sampling locations are: SW of ISFSI, (sample code SFDR1); NNW of ISFSI, (sample code SFDR2); North of ISFSI, (sample code SFDR3); NE of ISFSI, (sample code SFDR4); East of ISFSI, (sample code SFDR5); ESE of ISFSI, (sample code SFDR6); NNW of ISFSI, (sample code SFDR8); SSE of ISFSI, (sample code SFDR9); NW of ISFSI, (sample code SFDR10); WNW of ISFSI, (sample code SFDR1 1); WSW of ISFSI, (sample code SFDR12); South of ISFSI, (sample code SFDR13); SE of ISFSI, (sample code SFDR14); ENE of ISFSI, (sample code SFDR15); SSW of ISFSI, (sample code SFDR16); NNE of ISFSI, (sample code SFDR17) and West of ISFSI, (sample code SFDR18). Sampling locations are shown on Figures A-4 and A-5.The mean 90 day ambient radiation measured at the ISFSI indicator locations was 25.25 mR and ranged from 9.49 to 51.45 mR as reported in Table 4. The control location showed a 90 day mean of 12.84 mR and ranged from 11.63 to 13.56 mR. The location with the highest overall mean of 46.61 mR with a range of 40.54 to 51.45 mR was SFDR1 8, West of ISFSI. These readings are consistent with those expected from the storage of spent fuel in the ISFSI. A comparison of the average monthly radiation levels per calendar year of the ISFSI TLD data from the indicator locations with the ISFSI control location at the Visitor's Center, SFDR7, can be seen in Figure 7.III.D. CONCLUSION Low levels of Cs-137 were observed in the environment surrounding the ISFSI during the period. The Cs-137 observations were attributed to fallout from past atmospheric weapons testing. No other plant-related radionuclide was observed in the environs of the ISFSI.In general, the results in the following tables continue the historical trends previously observed at the official sites of the CCNPP REMP.21 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 FIGURE 7 Mean TLD Gamma Dose, ISFSI 10 Control Location (SFDR7)9- ISFSI Mean (DR7, SFDRI-6,8-18) 8 7 6 M 0 5 E 4 3-2-0*CD CO aD (0 00C C 0)0 )0) 0) 0 0 0 0 0ý!ý(N 22 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table 3 Synopsis of 2010 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program Sample Type Sampling Frequency 1 Number of Locations Number Collected Analysis Analysis Frequency 1 Number Analyzed Atmospheric26 Environment Air Particulates 2 Direct Radiation Ambient Radiation W 5 260 Gross Beta Gamma W MC 260 60 480 Q 20 480 TLD Q Terrestrial Environment Vegetation Q 5 20 Gamma Q 20 Soil Q 5 20 Gamma Q 20 W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 23 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analyses Performed Lower Limit of Detection (LLD)Indicator Locations Mean (F)/RangeI Location with Highest Annual Mean Name/Distance

&Direction 2 Highest Annual Mean (F) / Range 1 Control Locations Mean (F)/Range Atmospheric Environment Air Particulates (10-2 pCi/m 3)Direct Radiation Ambient Radiation (mR/90 days)Gross Beta (260)0.5 2.2 (208/208)(0.7-7.4)25.25 (456/456)(9.49-51.45)

MET Station SFA1 0.4 km NW 2.4 (52/52)(0.9-7.4)46.61 (24/24)(40.54-51.45) 2.0 (52/52)(0.8-4.1)12.84 (24/24)(11.63-13.56)

TLD (480)West of ISFSI SFDR18 0.1 kmW Terrestrial Environment Vegetation (pCi/L)Gamma (20)Cs-1 37 Gamma (20)Cs-1 37 27 17 20 (3/16)(10-40)233 (8/16)(78-498)On Site before Entrance to Camp Conoy SFB5 0.7 km ESE Entrance to Camp Conoy SFS5 0.7 km ESE 25 (2/4)(10-40)318 (4/4)(168-498)Soil (pCi/kg)63 (4/4)(41-80)' Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses 2 From the centerpoint of the ISFSI facility 24 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 IV. REFERENCES (1) Cohen, L. K., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 882 Semiannual Report January-June 1971, December 1971; NUS No.1025 Annual Report 1971, March 1973.(2) Cohen, L. K., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1137 Annual Report 1972, December 1973.(3) Cohen, L. K. and Malmberg, M.S., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1188, Annual Report 1973, October 1974.(4) Malmberg, M. S., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1333, Data Summary Report, September 1970 to September 1974, July 1975 (5) Calvert Cliffs Nuclear Power Plant, Units 1 and 2, License Nos. DPR-53 and DPR-69, Technical Specification 5.6.2; Annual Radiological Environmental Operating Report.(6) Offsite Dose Calculation Manual for the Calvert Cliffs Nuclear Power Plant.(7) CP-234, Specification and Surveillance for the Radiological Environmental Monitoring Program.(8) Constellation Energy Laboratory Procedures Manual, General Services Department.

(9) Constellation Energy, "Land Use Survey Around Calvert Cliffs Nuclear Power Plant, August 2010." (10) Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specifications, Appendix A to Materials License SNM-2505 (11) Baltimore Gas and Electric Company, Radiological Environmental Monitoring Program Pre-Operational Report for the Calvert Cliffs Independent Spent Fuel Storage Installation, August 1990 -November 1993, February 1994.(12) CP-501, Liquid and Steam Sampling Techniques (13) CNG-EV- 1.01 -1000, Radiological Environmental Monitoring Program (REMP)25 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 APPENDIX A Sample Locations for the REMP and the ISFSI Appendix A contains information concerning the environmental samples which were collected during this operating period.Sample locations and specific information about individual locations for the CCNPP REMP are given in Table A-1. Figure A-I shows the location of the CCNPP in relation to Southern Maryland and the Chesapeake Bay. Figures A-2 and A-3 show the locations of the power plant sampling sites in relation to the plant site at different degrees of detail.Sample locations and specific information about individual locations for the ISFSI radiological environmental monitoring program are given in Table A-2. Figures A-4 and A-5 show the locations of the ISFSI sampling sites in relation to the plant site at different degrees of detail.26 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS -SAMPLING LOCATIONS Table Title Page A-I Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..28 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at C alvert C liffs .................................................................................................

32 Figure Title Page A-I Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs N uclear Pow er Plant ..........................................................................................................

29 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles ..................................

30 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ................................

31 A-4 Independent Spent Fuel Storage Installation Sampling Locations

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33 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations

........ 34 27 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant Distance' Direction' Station Description (KM) (Miles) (Sector)A1 2 On Site Before Entrance to Camp Conoy 0.7 0.4 S A2 Camp Conoy Rd, at emergency siren 2.5 1.6 SSE A3 Bay Breeze Rd 2.6 1.6 SE A4 Route 765, Lusby 2.9 1.8 SSW A5 Emergency Operations Facility 19.3 12.0 WNW DR01 On Site, along Cliffs 0.6 0.4 NW DR02 Route 765, Auto Dump 2.7 1.7 WNW DR03 Route 765, Giovanni's Tavern (Knotty Pine) 2.3 1.4 W DR04 Route 765, across from White Sands Drive 2.0 1.2 WSW DR05 Route 765, John's Creek 2.4 1.5 SW DR06 Route 765, Lusby 2.9 1.8 SSW DR07 2 On Site before Entrance to Camp Conoy 0.7 0.4 S DR08 Camp Conoy Rd at Emergency Siren 2.5 1.6 SSE DR09 Bay Breeze Rd 2.6 1.6 SE DRIO Calvert Beach Rd and Decatur Street 6.4 4.0 NW DR1 1 Dirt road off Mackall & Parren Rd 6.6 4.1 WNW DR12 Mackall & Bowen Rds 6.7 4.2 W DR13 Mackall Rd, near Wallville 6.1 3.8 WSW DR14 Rodney Point 6.4 4.0 SW DRI5 Mill Bridge & Turner Rds 6.2 3.9 SSW DR16 Across from Appeal School 6.5 4.0 S DR17 Cove Point & Little Cove Point Rds 5.9 3.7 SSE DR18 Cove Point 7.1 4.4 SE DR19 Long Beach 4.4 2.7 NW DR20 On site, near shore 0.4 0.2 NNW DR21 Emergency Operations Facility (EOF) 19.3 12.0 WNW DR22 Solomons Island 12.5 7.8 S DR23 Taylors Island, Anderson's Property 12.4 7.7 ENE IA1 Discharge Area 0.3 0.2 N IA10 Hog Island 15.3 9.5 SSE IA2 Discharge Vicinity 0.3 0.2 N IA3 Camp Conoy 0.9 0.6 E IA4 Patuxent River --VARIOUS IA5 Patuxent River --VARIOUS IA6 Kenwood Beach 10.7 6.7 NNW IB1 Garden Off Bay Breeze Rd 2.6 1.6 SSE 1B2 Garden Off Bay Breeze Rd 2.6 1.6 SSE 1B3 Garden Off Bay Breeze Rd 2.6 1.6 SSE 1B4 On site, before entrance to Camp Conoy 0.7 0.4 S lB5 On site, before entrance to Camp Conoy 0.7 0.4 S 1B6 On site, before entrance to Camp Conoy 0.7 0.4 S 1B7 Emergency offsite facility 19.3 12.0 WNW 1B8 Emergency offsite facility 19.3 12.0 WNW 1B9 Emergency offsite facility 19.3 12.0 WNW WA1 Intake area 0.2 0.1 NNE WA2 Discharge area 0.3 0.2 N WB1 Shoreline at Barge Rd. 0.6 0.4 ESE'Distance and direction from the central point between the two containment buildings 2 Common to both the REMP and ISFSI monitoring program 28 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant 29 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-2 Miles 30 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-10 Miles 31 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs DistanceI Direction' Station Description (KM) (Sector)Air Particulate A12 On Site Before Entrance to Camp Conoy 0.7 S SFA1 Meteorological Station 0.4 NW SFA2 CCNPP Visitor's Center 0.7 NNE SFA3 NNW of ISFSI 0.1 NNW SFA4 SSE of ISFSI 0.1 SSE Direct Radiation DR072 On Site before Entrance to Camp Conoy 0.7 S DR30 Meteorological Station 0.4 NW SFDR01 SW of ISFSI 0.1 SW SFDR02 NNW of ISFSI 0.1 N SFDR03 North of ISFSI 0.1 N SFDR04 NE of ISFSI 0.1 NE SFDR05 East of ISFSI 0.1 E SFDR06 ESE of ISFSI 0.1 ESE SFDR07 CCNPP Visitor's Center 0.7 NNE SFDR08 NNW of ISFSI 0.1 NNW SFDR09 SSE of ISFSI 0.1 SSE SFDR10 NW of ISFSI 0.1 NW SFDR1 1 WNW ISFSI 0.1 WNW SFDR12 WSW of ISFSI 0.1 WSW SFDR1 3 South of ISFSI 0.1 S SFDR14 SE of ISFSI 0.1 SE SFDR15 ENE of ISFSI 0.1 ENE SFDR16 SSW of ISFSI 0.1 SW SFDR17 NNE of ISFSI 0.1 NNE SFDR18 West of ISFSI 0.1 W Vegetation SFB1 ISFSI Vegetation Met Station 0.4 NW SFB2 ISFSI Vegetation Visitors Center 0.7 NNE SFB3 ISFSI Vegetation NNW of ISFSI 0.1 NNW SFB4 ISFSI vegetation SSE of ISFSI 0.1 SSE SFB5 On Site before Entrance to Camp Conoy 0.7 ESE Soil SFS1 ISFSI Soil Meteorological Station 0.4 NW SFS2 ISFSI Soil CCNPP Visitors Center 0.7 NNE SFS3 ISFSI Soil NNW of ISFSI 0.1 NNW SFS4 ISFSI Soil SSE of ISFSI 0.1 SSE SFS5 ISFSI Soil On Site before entrance to Camp Conoy 0.7 ESE' Distance and direction from the central point of the ISFSI 2 Common to both the REMP and ISFSI monitoring program 32 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure A-4 Independent Spent Fuel Storage Installation Sampling Locations 33 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations 34 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 APPENDIX B Analysis Results for the REMP and the ISFSI Appendix B is a presentation of the analytical results for the CCNPP and the ISFSI radiological environmental monitoring programs.35 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS -ANALYTICAL RESULTS Table Title Page B-1 Concentration of Tritium and Gamma Emitters in Bay Water ..........................................

37 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ..........................................

38 B-3 Concentration of Gamma Emitters in Oyster Samples ......................................................

39 B-4 Concentration of Gamma Emitters in Shoreline Sediment .................................................

40 B-5 Concentration of Iodine-131 in Filtered Air ......................................................................

41 B-6 Concentration of Beta Emitters in Air Particulates

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43 B-7 Concentration of Gamma Emitters in Air Particulates

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47 B-8a Concentration of Gamma Emitters in Vegetation Samples ..............................................

48 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI ..... 49 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 50 B-10 Typical MDA Ranges for GammaSpectrometry

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51 B-11 Typical LLDs for Gamma Spectrometry

...........................................................................

52 B -12 D irect R adiation .......................................................................................................................

53 36 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-1 Concentration of Tritium and Gamma Emitters in Bay Water (Results in units of pCi/L +/- 2cr)Sample Code Sample Date Gamma Emitters H-3 1 WA1 Intake Vicinity WA2 2/1/2010 2/28/2010 4/1/2010 4/2/2010 4/30/2010 6/1/2010 6/30/2010 7/30/2010 8/30/2010 10/1/2010 11/1/2010 12/2/2010 12/30/2010

"*"**t<202<202 294 +/- 174<284 Discharge Vicinity 2/1/2010 2/28/2010 4/1/2010 4/2/2010 4/30/2010 6/1/2010 6/30/2010 7/30/2010 8/30/2010 10/1/2010 11/1/2010 12/2/2010 12/30/2010 Quarterly composite of monthly samples.* All Non-Natural Gamma Emitters <MDA***298 +/- 43 472 +/- 174 494 +/- 174 404 +/- 174 37 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish (Results in units of pCi/kg (wet) +/- 2a)Sample Code Sample Date Sample Type Gamma Emitters IAl Discharge Area 8/17/2010 Spot IA2 Discharge Area 8/17/2010 Perch IA4'Patuxent River 8/17/2010 Spot IA5 1 Patuxent River 8/18/2010 Perch'Control Location* All Non-Natural Gamma Emitters <MDA 38 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-3 Concentration of Gamma Emitters in Oyster Samples (Results in units of pCi/kg (wet) +/- 2a)Sample Code Sample Date Cs-1 37 Gamma Emitters IA3 Camp Conoy 3/23/2010 2 .6/22/2010 14+/-9 *8/18/2010 2 .10/20/2010 2 .IA6 1 2 Kenwood Beach 3/23/2010

• 6/22/2010 2 .8/18/2010 2 .10/20/2010 2 .'Control Location 2 This Isotope < MDA* All Non-Natural Gamma Emitters <MDA 39 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-4 Concentration of Gamma Emitters in Shoreline Sediment (Results in units of pCi/kg (dry) +/- 2y)Sample Code Sample Date Gamma Emitters WB1 Shoreline at Barge Rd. 7/8/2010 *12/7/2010

• • All Non-Natural Gamma Emitters <MDA 40 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m 3 +/- 2a)Start Date Stop Date Al A2 A3 A4 A51 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 12/28/2009 1/4/2010 .....1/4/2010 1/11/2010

.....1/11/2010 1/18/2010

.....1/18/2010 1/25/2010

.....1/25/2010 2/1/2010 .....2/1/2010 2/15/2010

.....2/15/2010 2/22/2010

......2/22/2010 3/1/2010 .....3/1/2010 3/8/2010 .....3/8/2010 3/15/2010

.....3/15/2010 3/22/2010

.....3/22/2010 3/29/2010

.....3/29/2010 4/5/2010 .....4/5/2010 4/12/2010

.....4/12/2010 4/19/2010

.....4/19/2010 4/26/2010

.....4/26/2010 5/3/2010 .....5/3/2010 5/10/2010

.....5/10/2010 5/17/2010

.....5/17/2010 5/24/2010

.....5/24/2010 5/31/2010

• 2 ...5/31/2010 6/7/2010 .6/7/2010 6/14/2010

.....6/14/2010 6/21/2010

.....6/21/2010 6/28/2010

.....6/28/2010 7/5/2010 .....7/5/2010 7/12/2010

.....7/12/2010 7/19/2010

.....7/19/2010 7/26/2010

.....7/26/2010 8/2/2010 .....8/2/2010 8/9/2010 .....8/9/2010 8/16/2010

.....8/16/2010 8/23/2010

.....8/23/2010 8/30/2010

.....8/30/2010 9/6/2010 .....9/6/2010 9/13/2010

.....9/13/2010 9/20/2010

.....9/20/2010 9/27/2010

.....41 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m 3+/- 2a)Start Date Stop Date Al Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A5 1 EOF 9/27/2010 10/4/2010 10/11/2010 10/18/2010 10/25/2010 11/1/2010 11/8/2010 11/15/2010 11122/2010 10/4/2010 10/11/2010 10/18/2010 10/25/2010 11/1/2010 11/8/2010 11/15/2010 11/22/2010 11/29/2010"it"k"A""**A 11/29/2010 12/6/2010

• 12/6/2010 12/13/2010

• 12/13/2010 12/20/2010

• 12/20/2010 12/27/2010

• 12/27/2010 1/3/2011 *Control Location 2 Sampler malfunction/low flow* All Non-Natural Gamma Emitters <MDA al""A" 42 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2a)Start Date Stop Date Al A2 A3 A4 A51 Entrance to Camp Bay-Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 12/28/2009 1/4/2010 3.2 +/-0.3 2.8 +/-0.3 2.6 +/-0.3 2.9 +/-0.3 2.2+/-0.2 1/4/2010 1/11/2010 2.0+1-0.3 1.5+/-0.2 2.1 +1-0.3 2.5+1-0.4 1.9+1-0.2 1/11/2010 1/18/2010 2.3+1-0.2 2.1 +1-0.3 3.3+1-0.3 3.5+/-0.4 3.3+1-0.2 1/18/2010 1/25/2010 1.7 +/- 0.2 1.6 +/- 0.2 2.7 +/- 0.4 2.3 +/- 0.3 1.9 +/- 0.1 1/25/2010 2/1/2010 2.6 +/- 0.3 2.2 +/- 0.2 2.2 +/- 0.2 3.6 +/- 0.4 2.5 +/- 0.2 2/1/2010 2/15/2010 1.4+/-0.1 1.1 +/-0.1 1.2+/-0.1 3.0+/-0.3 1.8+/-0.1 2/15/2010 2/22/2010 1.9+/-0.3 1.5+/-0.2 1.5+/-0.2 2.6+/-0.3 1.7+/-0.1 2/22/2010 3/1/2010 1.2+/-0.2 1.0+/-0.2 1.1 +/-0.2 1.7+/-0.3 1.4+/-0.1 3/1/2010 3/8/2010 1.7 +/-0.2 1.4 +/-0.2 1.3 +/-0.2 2.1 +/-0.3 1.3 +/-0.1 3/8/2010 3/15/2010 1.5 +/-0.3 1.6 +/-0.2 1.4 +/-0.3 3.2 +/-0.4 *3/15/2010 3/22/2010 1.8 +/- 0.2 1.6 +/- 0.2 1.7 +/- 0.2 2.4 +/- 0.4 1.8 +/- 0.1 3/22/2010 3/29/2010 1.7 +/-0.3 1.7 +/-0.2 1.7 +/-0.2 2.4 +/-0.4 1.8 +/-0.1 3/29/2010 4/5/2010 0.7 +/-0.2 0.8 +/-0.2 0.9 +/-0.2 1.2 +/-0.3 0.9 +/-0.1 4/5/2010 4/12/2010 2.2 +/-0.3 2.1 +/-0.2 2.0 +/-0.2 3.2 +/-0.4 2.0 +/-0.1 4/12/2010 4/19/2010 2.0 +/- 0.2 1.9 +/- 0.2 1.9 +/- 0.2 3.1 +/- 0.4 1.9 +/- 0.1 4/19/2010 4/26/2010 1.7 +/-0.2 2.3 +/-0.3 1.6 +/-0.2 1.7 +1-0.3 2.1 +/-0.2 4/26/2010 5/3/2010 1.4+/-0.2 1.6+/-0.3 1.6+/-0.3 1.9+/-0.3 1.6+/-0.1 5/3/2010 5/10/2010 1.3+/-0.2 1.7+/-0.2 1.5+/-0.3 2.4+/-0.3 1.8+/-0.1 5/10/2010 5/17/2010 1.0 +/-0.2 2.1 +/-0.3 1.5 +/-0.3 1.1 +/-0.2 1.4 +/-0.1 5/17/2010 5/24/2010 0.9+/-0.2 0.9+/-0.3 1.0+/-0.3 0.9+/-0.2 1.1 +/-0.1 5/24/2010 5/31/2010 1.0+/-0.2 2 1.1 +/-0.3 1.0+/-0.2 1.5+/-0.2 5/31/2010 6/7/2010 1.9+/-0.1 1.7+/-0.3 1.5+/-0.3 1.4+/-0.2 1.7+/-0.1 6/7/2010 6/14/2010 1.9+/-0.1 1.3+/-0.2 1.7+/-0.3 1.4+/-0.2 1.9+/-0.1 6/14/2010 6/21/2010 2.1 +/-0.1 1.4+/-0.2 1.6+/-0.3 1.7+/-0.2 2.3+/-0.1 6/21/2010 6/28/2010 2.9 +/- 0.2 2.4 +/- 0.2 2.7 +/- 0.3 2.5 +/- 0.3 2.7 +/- 0.2 6/28/2010 7/5/2010 1.3+/-0.1 1.4+/-0.2 1.4+/-0.3 1.1 +/-0.2 1.3+/-0.1 7/5/2010 7/12/2010 3.4 +/-0.2 1.9 +/-0.2 2.2 +/-0.3 2.9 +/-0.3 3.4 +/-0.2 7/12/2010 7/19/2010 2.8 +/-0.2 2.6 +/-0.3 2.8 +/-0.3 2.6 +/-0.3 2.8 +/-0.2 7/19/2010 7/26/2010 2.8 +/-0.2 1.7 +/-0.2 1.8 +/-0.3 1.8 +/-0.2 2.5 +/-0.1 7/26/2010 8/2/2010 1.9 +/-0.2 1.6 +/-0.3 2.0 +/-0.4 1.6 +/-0.2 1.7 +/-0.1 8/2/2010 8/9/2010 2.4 +/-0.1 1.4 +/-0.2 2.0 +/-0.3 1.9 +/-0.2 2.2 +/-0.1 8/9/2010 8/16/2010 2.4+/-0.2 1.7+/-0.3 2.2+/-0.4 2.1 +/-0.3 2.4+/-0.2 8/16/2010 8/23/2010 3.4 +/-0.2 2.1 +/-0.3 2.6 +/-0.3 2.9 +/-0.3 3.3 +/-0.2 8/23/2010 8/30/2010 2.4 +/-0.1 1.6 +/-0.2 1.4 +/-0.3 1.9 +/-0.2 2.1 +/-0.1 8/30/2010 9/6/2010 4.3 +/-0.2 2.3 +/-0.2 3.0 +/-0.4 3.4 +/-0.3 3.7 +/-0.2 9/6/2010 9/13/2010 2.3 +/-0.1 1.8 +/-0.3 2.0 +/-0.3 2.0 +/-0.2 2.0 +/-0.1 9/13/2010 9/20/2010 3.1 +/-0.2 2.6+/-0.3 2.9+/-0.4 2.9+/-0.3 2.8+/-0.2 9/20/2010 9/27/2010 4.4+/-0.2 2.9+/-0.3 3.5+/-0.4 3.9+/-0.3 4.1 +/-0.2 43 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2a)Start Date Stop Date Al A2 A3 A4 A51 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 9/27/2010 10/4/2010 1.0 +/-0.1 1.0+/-0.2 1.6+/-0.3 0.9+/-0.2 1.1 +/-0.1 10/4/2010 10/11/2010 3.7+/-0.2 2.7+/-0.2 3.4+/-0.3 2.8+/-0.2 3.1 +/-0.2 10/11/2010 10/18/2010 2.8 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.4 2.4 +/- 0.3 2.4 +/- 0.1 10/18/2010 10/25/2010 2.6 +/- 0.2 2.3 +/- 0.2 2.8 +/- 0.3 2.2 +/- 0.2 2.3 +/- 0.1 10/25/2010 11/1/2010 1.9+/-0.2 2.4+/-0.3 2.3+/-0.3 1.7+/-0.3 1.5+/-0.1 11/1/2010 11/8/2010 1.2+/-0.2 0.9+/-0.2 1.3+/-0.2 1.2 +/-0.2 1.3+/-0.1 11/8/2010 11/15/2010 2.5+/-0.2 1.9+/-0.2 1.9+/-0.2 2.1 +/-0.2 2.4+/-0.2 11/15/2010 11/22/2010 4.5 +/- 0.2 2.9 +/- 0.3 2.8 +/- 0.3 4.0 +/- 0.4 3.8+/-0.2 11/22/2010 11/29/2010 3.0 +/- 0.2 2.2 +/- 0.3 2.3 +/- 0.3 2.3 +/- 0.3 2.7 +/- 0.2 11/29/2010 12/6/2010 2.4+/-0.1 1.7+/-0.2 1.7+/-0.2 2.2+/-0.3( 2.0+/-0.1 12/6/2010 12/13/2010 2.4+/-0.2 2.3+/-0.3 3.3+/-0.3 2.3+/-0.3 2.4+/-0.2 12/13/2010 12/20/2010 2.7 +/-0.2 2.5 +/-0.3 2.9 +/-0.3 2.9 +/-0.3 2.3 +/-0.1 12/20/2010 12/27/2010 1.5+/-0.1 1.6+/-0.2 1.2+/-0.2 1.3+/-0.2 1.3 +/-0.1 12/27/2010 1/3/2011 3.4+/-0.2 2.8+/-0.3 2.8+/-0.3 2.9+/-0.3 3.1 +/-0.2 Control Location 2 Sampler malfunction/low flow<MDA 44 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-6 -Continued Start Date Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m 3 +/- 2a)Stop Date SFA1 SFA2 1 SFA3 MET Station Visitors NNW of ISFSI Center SFA4 SSE of ISFSI 12/28/2009 1/4/2010 1/11/2010 1/18/2010 1/25/2010 2/1/2010 2/15/2010 2/22/2010 3/1/2010 3/8/2010 3/15/2010 3/22/2010 3/29/2010 4/5/2010 4/12/2010 4/19/2010 4/26/2010 5/3/2010 5/10/2010 5/17/2010 5/24/2010 5/31/2010 6/7/2010 6/14/2010 6/21/2010 6/28/2010 7/5/2010 7/12/2010 7/19/2010 7/26/2010 8/2/2010 8/9/2010 8/16/2010 8/23/2010 8/30/2010 9/6/2010 9/13/2010 9/20/2010 1/4/2010 1/11/2010 1/18/2010 1/25/2010 2/1/2010 2/15/2010 2/22/2010 3/1/2010 3/8/2010 3/15/2010 3/22/2010 3/29/2010 4/5/2010 4/12/2010 4/19/2010 4/26/2010 5/3/2010 5/10/2010 5/17/2010 5/24/2010 5/31/2010 6/7/2010 6/14/2010 6/21/2010 6/28/2010 7/5/2010 7/12/2010 7/19/2010 7/26/2010 8/2/2010 8/9/2010 8/16/2010 8/23/2010 8/30/2010 9/6/2010 9/13/2010 9/20/2010 9/27/2010 2.2 +/- 0.2 1.9 +/- 0.2 3.6 +/- 0.2 1.8 +/- 0.1 2.4 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 1.1 +/-0.1 1.4 +/-0.1 2.0 +/- 0.1 1.9 +/- 0.1 1.5 +/- 0.1 0.9 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.4 +/- 0.1 1.0 +/- 0.1 1.9 +/- 0.3 2.1 +/- 0.1 2.2 +/- 0.1 1.9 +/- 0.1 3.1 +/-0.2 1.6 +/- 0.1 3.4 +/- 0.2 3.2 +/- 0.2 2.8 +/- 0.2 1.7 +/- 0.1 2.6 +/- 0.1 2.6 +/- 0.2 3.4 +/- 0.2 7.4 +/- 0.4 4.6 +/- 0.2 2.8 +/- 0.2 3.4 +/- 0.2 4.6 +/- 0.2 2.0 +/- 0.2 1.9 +/- 0.2 2.9 +/- 0.2 1.5 +/- 0.1 2.1 +/-0.1 1.6 +/-0.1 1.6 +/-0.1 1.3 +/-0.1 1.2 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 1.5 +/- 0.1 0.8 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 1.2 +/- 0.1 1.0 +/- 0.1 1.1 +/-0.2 1.9 +/- 0.2 1.7 +/- 0.1 1.9 +/- 0.1 2.7 +/- 0.2 1.1 +/-0.1 2.7 +/- 0.1 2.4 +/- 0.1 2.2 +/- 0.1 1.5 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 2.8 +/- 0.1 2.1 +/-0.1 3.7 +/- 0.2 1.9 +/- 0.1 2.8 +/- 0.2 3.5 +/- 0.2 2.7 +/- 0.3 2.1 +/-0.3 2.9 +/- 0.3 1.8 +/- 0.3 2.9 +/- 0.3 1.6 +/- 0.2 1.7 +/- 0.2 1.1 +/-0.3 1.5+/-0.2 2.2 +/- 0.4 1.9 +/- 0.3 2.0 +/- 0.2 1.2 +/- 0.2 2.3 +/- 0.3 2.1 +/-0.3 2.0 +/- 0.3 1.9+/-0.3 1.8+/-0.2 1.1 +/-0.2 1.2 +/- 0.2 1.3 +/- 0.2 1.6 +/- 0.2 2.0 +/- 0.3 1.8 +/- 0.2 2.6 +/- 0.2 1.3 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.3 2.1 +/-0.3 1.6 +/- 0.3 2.3 +/- 0.2 2.1 +/-0.3 3.1 +/-0.3 2.0 +/- 0.2 3.7 +/- 0.3 1.9 +/- 0.2 2.8 +/- 0.3 4.0 +/- 0.4 2.9 +/- 0.3 2.1 +/-0.3 2.5 +/- 0.3 1.9 +/- 0.2 2.6 +/- 0.3 1.4 +/- 0.2 1.9+/-0.3 1.4 +/- 0.2 1.5 +/- 0.2 1.7 +/- 0.3 1.9 +/- 0.3 1.7 +/- 0.2 0.8 +/- 0.2 2.1 +/-0.3 2.1 +/-0.3 1.5 +/- 0.2 1.7 +/- 0.2 1.3 +/- 0.2 1.0 +/- 0.2 0.8 +/- 0.2 0.9 +/- 0.2 1.1 +/-0.2 1.4 +/- 0.2 1.5 +/- 0.2 2.4 +/- 0.2 1.1 +/-0.2 2.2 +/- 0.2 2.4 +/- 0.2 1.9 +/- 0.2 1.8 +/- 0.3 1.9 +/- 0.2 1.7 +/- 0.2 2.6 +/- 0.2 2.0 +/- 0.2 3.3 +/- 0.3 1.7 +/- 0.2 2.4 +/- 0.3 3.8+/-0.3 45 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-6 -Continued Start Date Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m 3 +/- 2a)Stop Date SFA1 SFA2 1 SFA3 MET Station Visitors NNW of ISFSI Center SFA4 SSE of ISFSI 9/27/2010 10/4/2010 10/11/2010 10/18/2010 10/25/2010 11/1/2010 11/8/2010 11/15/2010 11/22/2010 11/29/2010 12/6/2010 12/13/2010 12/20/2010 12/27/2010 Control Location 10/4/2010 10/11/2010 10/18/2010 10/25/2010 11/1/2010 11/8/2010 11/15/2010 11/22/2010 11/29/2010 12/6/2010 12/13/2010 12/20/2010 12/27/2010 1/3/2011 1.1 +/-0.1 4.0 +/- 0.2 2.8 +/- 0.2 2.8 +/- 0.2 2.0 +/- 0.1 1.3 +/- 0.1 2.7 +/- 0.2 4.3 +/- 0.2 2.9 +/- 0.2 2.2 +/- 0.1 2.3 +/- 0.2 2.7 +/- 0.1 1.6 +/- 0.1 3.3 +/- 0.2 0.9 +/- 0.1 3.0 +/- 0.1 2.3 +/- 0.1 2.1 +/- 0.1 1.6 +/-0.1 1.0 +/- 0.1 2.2 +/- 0.2 4.1 +/-0.2 2.9 +/- 0.2 2.1 +/-0.1 2.2 +/- 0.2 2.6 +/- 0.2 1.3 +/- 0.1 3.2 +/- 0.2 1.3 +/- 0.2 3.4 +/- 0.3 2.5 +/- 0.3 2.3 +/- 0.3 1.7 +/- 0.3 1.3 +/- 0.2 1.9 +/- 0.2 3.7 +/- 0.3 2.2 +/- 0.2 2.0 +/- 0.2 2.0 +/- 0.3 2.6 +/- 0.3 1.6 +/-0.2 3.1 +/-0.3 1.1 +/-0.2 2.9 +/- 0.2 2.3 +/- 0.2 2.0 +/- 0.2 1.6 +/- 0.2 0.9 +/- 0.2 1.9 +/- 0.2 3.4 +/- 0.3 2.4 +/- 0.2 1.9 +/- 0.2 1.8 +/- 0.3 2.3 +/- 0.2 1.5 +/- 0.2 2.8 +/- 0.3 46 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10-3 pCi/m 3+/- 2a)Sample Date Al Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A5 1 EOF 2/1/2010 .....3/1/2010 .....3/29/2010

.....5/3/2010 .....5/31/2010

.....6/28/2010

.....8/2/2010 .....8/30/2010

.....9/27/2010

• * * * *11/1/2010

.....11/29/2010

...1/3/2011 .....Sample Date SFA1 SFA2 1 SFA3 SFA4 MET Station Visitors Center NNW of ISFSI SSE of ISFSI 2/1/2010 ....3/1/2010 ....3/29/2010

....5/3/2010 ....5/31/2010

• * * *6/28/2010

....8/2/2010 ....8/30/2010

....9/27/2010

....11/1/2010

....11/29/2010

....1/3/2011 ....Control Location* All Non-Natural Gamma Emitters <MDA 47 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-8a Concentration of Gamma Emitters in Vegetation Samples (Results in units of pCi/kg (wet) +/- 2a)Sample Code Sample Date Sample Type Gamma Emitters IB1 Bay Breeze Rd IB2 Bay Breeze Rd 1B3 Bay Breeze Rd IB4 Camp Conoy Entrance IB5 Camp Conoy Entrance IB6 Camp Conoy Entrance IB7 1 EOF IB8 1 EOF 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 7/27/2010 8/31/2010 9/29/2010 Greens Green Peppers Green Peppers Green Peppers Eggplant Leaves Tree Leaves Greens Tree Leaves Tree Leaves Eggplant Leaves Green Peppers Green Peppers Green Peppers Eggplant Leaves Eggplant Leaves Greens Greens Tree Leaves Eggplant Leaves Green Peppers Green Peppers Green Peppers Eggplant Leaves Eggplant Leaves"***k 1B9 1 EOF Squash Squash Greens 1 Control Location 2 Reject Results, bad data file* All Non-Natural Gamma Emitters <MDA Greens 48 January. 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI (Results in units of pCi/kg (wet) +/- 2a)Sample Code Sample Date Cs-1 37 Gamma Emitters SFB1 MET Station SFB2 1 Visitor's Center SFB3 NNW of ISFSI SFB4 SSE of ISFSI SFB5 On Site before Entrance to Camp Conoy 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 2 2 2 2 2 2 2 2 2 2 2 2**2 10 +/-4 2 2 2 2 10 +/-7 40 +/- 22"*"**k 3/14/2010 5/28/2010 9/14/2010 12/7/2010 1 Control Location 2 This Isotope <MDA* All Non-Natural Gamma Emitters <MDA'Control Location 2 This Isotope <M4DA* All Non-Natural Gamma Emitters <MDA 49 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI (Results in units of pCi/kg (dry) +/- 2or Sample Code Sample Date Cs-1 37 Gamma Emitters SFS1 MET station SFS2 2 Visitors Center SFS3 NNW of ISFSI SFS4 SSE of ISFSI SFS5 Entrance to Camp Conoy 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 3/14/2010 5/28/2010 9/14/2010 12/7/2010 1 1 1 1"k 80 +/- 35 66 +/- 35 64 +/- 36 41 +/- 31 195 +/- 47 137 +/- 55 183+/-43 78+/-23 404 +/- 85 498 +/- 57 168 +/- 35 203+/-40 This isotope <MDA 2 Control Location* All Non-Natural Gamma Emitters <MDA 50 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-10 Typical MDA Ranges for Gamma Spectrometry Bay Water, Air Surface Ground Milk Oysters Shoreline Soil Vegetation Selected Particulates Water, Fish water Sediment (pCi/kg)Nuclides (10-2 pCi/m 3) Drinking pCi/kg (wet) pCi/L pCi/L (pCi/kg) pCi/kg (dry) pCi/kg (dry)Water (pCi/L)Na-22 0-0 3-7 25-43 3-7 4-8 16-33 36-86 34-98 14-55 K-40 0-.1 32-73 193-327 35-84 37-69 134-234 375-699 257-838 136-412 Cr-51 .1 -1 23 -45 348-710 25-42 18-45 148-314 433-1481 290-1048 78-291 Mn-54 0-0 3-6 20-30 3-6 2-6 14-24 36-69 31 -82 11-40 Co-58 0-0 3-6 27-46 3-6 2-6 16-27 41-97 35-98 11-40 Fe-59 0-.1 6-13 92-160 6-13 6-15 45-81 88-341 84-248 28-98 Co-60 0-0 3-7 23-36 3-7 3-8 16-27 34-74 33-90 14-49 Zn-65 0-0 6-14 54-91 7-14 6-16 35-65 107-196 82-230 30-100 Nb-95 0-.1 3-6 45-83 3-6 3-6 23-44 67-183 42-144 12-43 Zr-95 0-0 5-10 51 -83 5-10 5-10 29-56 76-183 60.8-175 18-70 Ru-106 0-0 23-51 153-260 23-56 25-51 107-195 269-543 248-675 91 -330 Ag-11Om 0-0 3-6 19-30 3-6 3-6 12-23 30-62 29-98 10-37 1-131 1 0-7 119-13898 3.7-6.5 .4-.8 112-440 69-11396 0-1650 15-62 Cs-134 0-0 2-5 16-26 3-6 2-5 11-21 30-65 39-85 9-37 Cs-137 0-0 3-6 16-30 3-6 2-6 12-23 35-60 34-73 11-41 Ba-140 0-194 6-12 91 -1396 5-10 4-10 79-260 3-2360 49-709 18-80 La-140 0-194 6-12 91 -1396 5-10 4-10 79-260 3-2360 49-709 18-80 Ce-144 0-0 14-29 51 -101 16-29 16-29 38-62 149-223 120-322 40-142 This MDA range for 1-131 on a silver zeolite cartridge is typically 4.16 x 1OE-3 to 3.40 x 1OE-2 51 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-11 Typical LLDs for Gamma Spectrometry Air Bay Water, Selected Particulates Surface Water, Fish pCi/kg Ground water Oysters pCi/kg Precipitation Soil pCi/kg Vegetation Nuclides 10-3 pCi/m3 Drinking Water (wet) pCi/L (wet) pCi/L (dry) (pCi/kg)pCi/L Na-22 2.9 2.9 22 2.9 22 2.9 24 35 Cr-51 12 17 88 17 88 17 110 162 Mn-54 2.1 2.4 17 2.4 17 2.4 18 27 Co-58 2 2.4 16 2.4 16 2.4 17 25 Fe-59 4.6 5.2 37 5.2 37 5.2 38 60 Co-60 2.7 2.8 22 2.8 22 2.8 21 33 Zn-65 2.8 5.6 23 5.6 23 5.6 54 66 Nb-95 1.9 2.2 15 2.2 15 2.2 18 25 Zr-95 3.3 3.8 27 3.8 27 3.8 29 44 Ru-106 17 20 135 20 135 20 146 223 Ag-110m 1.8 2.1 14 2.1 14 2.1 16 25 Te-129m 20 26 149 26 149 26 180 265 1-131 1.5 2 11 2 11 2 14 20 Cs-134 1.9 2.2 15 2.2 15 2.2 20 24 Cs-137 1.8 2.3 15 2.3 15 2.3 17 27 Ba-140 6.1 7.3 48 7.3 48 7.3 54 80 La-140 3.4 4.1 26 4.1 26 4.1 25 41 Ce-144 5.5 12 43 12 43 12 75 101* The LLD for 1-131 measured on a silver zeolite cartridge is 2.0 xlOE-3 pCi/m^3 52 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-12 Site Code DR01 DR02 DR03 DR04 DR05 DR06 DR07 Location On Site, along Cliffs Route 765, Auto Dump Route 765, Giovanni's Tavern Route 765, across from White Sands Drive.Route 765, John's Creek Route 765 at Lusby Entrance to Camp Conoy Camp Conoy Rd at Emergency Siren Bay Breeze Rd Calvert Beach Rd and Decatur Street Dirt road off Mackall &Parren Rd Mackall & Bowen Rds Mackall Rd, near Wallville Direct Radiation (Results in Units of mR/90 days +/- 2a)First Quarter Second Quarter 12.41 +/- 1.94 10.87 +/- 2.65 10.35 +/- 0.40 10.15 +/- 1.07 10.51 +/- 1.24 9.74 +/- 0.60 DR08 DR09 DR10 DR11 DR12 DR13 12.25 +/- 0.46 11.83 +/- 0.89 9.65 +/- 1.40 10.50 +/- 0.44 13.97 +/- 1.30 10.80 +/- 0.59 10.12 +/- 1.44 10.92 +/- 1.12 10.22 +/- 0.74 11.24 +1- 0.59 11.10 +/- 0.58 10.90 +/- 0.91 8.95 +/- 0.88 9.49 +/- 1.08 13.36 +/- 0.39 10.52 +/- 1.24 9.35 +/- 0.97 9.83 +/- 1.30 9.55 +/- 1.28 11.06 +/- 0.73 Third Quarter 13.00 +/- 1.32 11.21 +/- 1.21 11.38 +/- 0.98 12.97 +/- 0.89 12.38 +/- 1.27 10.34 +/- 0.73 10.88 +/- 1.22 14.75 +/- 1.59 12.11 +/- 1.53 10.92 +/- 0.54 11.57 +/- 0.16 10.92 +/- 1.44 12.28 +/- 1.84 Fourth Quarter 13.61 +/- 1.48 11.26 +/- 0.51 11.06 +/- 1.54 12.59 +/- 1.98 12.56 +/- 0.84 10.75 +/- 0.70 11.14 +/- 0.99 15.41 +/- 0.92 11.70 +/- 1.06 10.76 +/- 0.90 11.39 +/- 0.60 11.32 +/- 1.07 12.35 +/- 0.57 53 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2a)Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR14 DR15 DR16 DR17 DR18 DR1 9 DR20 DR21 1 DR22 1 DR23 1 DR30 SFDR01 SFDR02 SFDR03 SFDR04 Rodney Point Mill Bridge & Turner Rds Across from Appeal School Cove Point & Little Cove Point Rds Cove Point Long Beach On site, near shore EOF Solomons Island Taylors Island MET Station SW of ISFSI NNW of ISFSI North of ISFSI NE of ISFSI 12.76 +/- 0.99 11.31 +/- 0.29 10.27 +/- 1.21 12.16 +/- 1.21 9.87 +/- 0.76 10.64 +/- 0.94 12.90 +/- 0.83 12.00 +/- 1.12 10.93 +/- 0.71 14.49 +/- 1.19 11.75 +/- 0.66 17.36 +/- 0.48 18.76 +/- 2.29 37.75 +/- 5.60 32.17 +/- 3.65 12.57 +/- 0.82 10.88 +/- 1.05 9.73 +/- 0.15 11.32 +/- 1.16 8.69 +/- 0.83 10.51 +/- 0.69 12.31 +/- 0.71 11.26 +/- 1.14 13.99 +1 1.26 12.60 +- 0.54 11.07+/- 1.00 12.78 +- 0.18 13.60 +/- 0.98 12.22 +/- 1.18 10.84 +/- 0.68 12.57 +/- 0.75 10.52 +-11.13 +-13.88 +/-12.89 +-11.65 +-17.35 +-12.23 +-17.79 +-19.91 +/-0.19 0.69 1.14 0.98 0.79 1.60 0.49 2.03 1.25 15.37 +/-10.94 +/-15.26 +/-17.87 +/-31.73 +/-26.40 +/-1.95 0.63 1.30 2.21 2.97 4.57 10.43 +/-11.78 +/-13.71 +/-12.60 +/-11.74 +/-16.19 +/-11.73 +/-17.60 +/-19.83 +/-34.45 +/-32.16 +/-0.64 0.33 2.19 1.60 1.23 1.08 0.67 1.95 2.06 5.16 2.76 36.04 +/- 2.75 31.97 +/- 4.33 54 January 1 -December 3 1, 2010 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2ca)Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter SFDR05 SFDR06 SFDR07 1 SFDR08 SFDR09 SFDR10 SFDR11 SFDR12 SFDR13 SFDR14 SFDR15 SFDR16 SFDR17 SFDR18 Control Location* Missing Data East of ISFSI ESE of ISFSI Visitor's Center NNW of ISFSI SSE of ISFSI NW of ISFSI WNW ISFSI WSW of ISFSI South of ISFSI SE of ISFSI ENE of ISFSI SSW of ISFSI NNE of ISFSI West of ISFSI 20.36 +/- 2.95 16.40 +/- 1.15 12.83 +/- 1.35 27.28 +/- 5.15 14.44 +/- 1.40 30.67 +/- 12.01 31.06 +/- 4.33 47.80 +/- 17.52 23.38 +/- 6.65 15.66 +/- 1.97 21.58 +/- 2.80 35.13 +/- 5.37 37.59 +/- 6.03 48.18+/- 8.82 15.26 +/- 1.10 14.37 +/- 1.40 11.63 +/- 0.72 24.65 +/- 1.82 14.34 +/- 1.51 26.78 +/- 10.25 26.04 +/- 1.16 42.99 +/- 10.14 20.86 +/- 6.56 13.23 +/- 1.61 17.81 +/- 3.44 29.29 +/- 4.23 32.60 +/- 8.22 40.54 +/- 5.88 19.05 +/- 3.82 16.68 +/- 1.95 13.56 +/- 0.77 29.31 +/- 2.52 15.30 +/- 1.19 31.14 +/- 10.94 27.40 +4- 3.18 42.38 +/- 8.41 23.44 +/- 4.64 15.83 +/- 1.66 20.17 +/- 4.02 33.28 +/- 5.74 35.85 +/- 2.15 46.27 +/- 9.80 19.80 +/- 3.63 16.68 +/- 1.22 13.34 +/- 1.42 29.52 +/- 4.50 15.56 +/- 1.91 34.61 +/- 9.75 27.88 +/- 7.25 45.12 +/- 10.16 24.84 +/- 7.54 16.16 +/- 2.08 23.57 +/- 3.12 36.17 +/- 4.76 37.29 +/- 8.00 51.45 +/- 12.58 55 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 APPENDIX C Quality Assurance Program Appendix C is a summary of Constellation Energy laboratory's quality assurance program. It consists of Table C-I which is a compilation of the results of the Constellation Energy Laboratory's participation in an intercomparison program with Environmental Resource Associates (ERA) located in Arvada, Colorado and Analytics, Inc. located in Atlanta, Georgia.It also includes Table C-2 which is a compilation of the results of the Constellation Energy Laboratory's participation in a split sample program with Teledyne Brown Engineering located in Knoxville, Tennessee and Table C-3 which is a list of typical MDAs achieved by Teledyne Brown for Gamma Spectroscopy.

All the Constellation Energy Laboratory's results contained in Table C-I generally agree with the intercomparison laboratories' results within the range of +/-2 a of each other. In addition, all the sets of intercomparison results in the table are in full agreement when they were further evaluated using the NRC Resolution Test Criteria .The uncertainties for the Constellation Energy Laboratory's results and Analytics' results are +2a while the ERA laboratory's 2 uncertainty is based on USEPA guidelines2.

All the results contained in Table C-2 agree within the range of +/-2 a of each other with their respective Constellation Energy Laboratory original, replicate and/or Teledyne Brown Engineering's split laboratory samples, except for the comparisons of one soil sample and a bottom sediment sample involving Cs-137 results: The original analysis of the soil sample from SFS2 collected on 5/28/2010 and bottom sediment sample from WBS2 collected on 10/20/10 do not agree within the range of +/-2a of their respective QC comparison soil samples analyzed.These minor discrepancies, occurring very close to or below the analyses MDA's, are most probably due to counting statistics and/or the non-homogeneous nature of the sample-splitting process. Other samples whose nature generally precludes sample splitting are marked "**" in the Split Analysis column.1 NRC Inspection Manual, Inspection Procedure 84750, March 15, 1994 2 National Standards for Water Proficiency Testing Studies Criteria Document, December 1998 56 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS -ANALYTICAL RESULTS Table Title Page C-1 C-2 C-3 Results of Participation in Cross Check Programs .............................................................

58 Results of Quality Assurance Program .............................................................................

61 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry

......................

67 57 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Sample Type and Reported Cross Check Lab Sample Date Units Isotope Observed Laboratory's Results Results 03/18/10 Air Iodine- pCi 03/18/10 03/18/10 04/05/10 Charcoal Milk- pCi/L Water -pCi/L Water -pCi/L 1-131 Co-58 Co-60 Zn-65 1-131 Cs-1 34 Cs-1 37 Ce-141 Cr-51 Mn-54 Fe-59 Gross Beta 06/17/10 Air particulates on filter -pCi Co-60 Ba-1 33 Cs-1 37 Cs-1 34 Zn-65 Mn-54 Cr-51 Ce-141 Cs-1 37 Cs-1 34 Zn-65 Co-60 Co-58 Fe-59 107.0 +/- 6.0 131.0 +/- 11.7 166.0 +/- 9.8 225.0 +/- 26.8 66.0 +/- 12.3 142.0 +/- 6.8 146.0 +/- 11.2 227.0 +/- 13.7 326.0 +/- 76.9 189.0 +/- 13.7 129.0 +/- 15.8 266 +/- 3.08 85.0 +/- 6.3 53.9 +/- 7.0 139.0 +/- 10.2 64.3 +/- 5.0 202.0 +/- 7.0 119.0 +/- 8.5 254.0 +/- 31.9 80.0 +/- 5.0 103.0 +/- 8.0 67.0+/-6.0 146.0 +/- 16.0 133.0 +/- 7.0 66.5 +/- 6.4 89.0 +/- 9.0 88.5 +/- 1.4 143.0 +/- 2.4 183.0 +/- 3.1 254.0 +/- 4.2 74.0 +/- 1.2 178.0 +/- 3.0 158.0 +/- 2.6 261.0 +/- 4.4 361.0 +/- 6.0 207.0 +/- 3.5 137.0 +/- 2.3 293 +/- 4.89 84.5 65.9 146.0 71.6 186.0 111.0 +/- 1.9 222.0 +/- 3.7 72.0 +/- 1.2 98.0 +/- 1.6 82.2 +/- 1.4 135.0 +/- 2.3 129.0 +/- 2.2 66.1 +/- 1.1 77.6 +/- 1.3 58 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Sample Type and Reported Cross Check Lab Sample Date Units Isotope Observed Laboratory's Results Results 06/17/10 06/17/10 06/17/10 07/06/10 07/06/10 07/06/10 10/04/10 Water -pCi/L Water 0 2 pCi/L Water -pCi/L Water -pCi/L Water 2pCi/L Water -uCi/L Water -pCi/L Fe-59 Cs-1 34 Cs-1 37 Ce-141 Cr-51 Mn-54 1-131 Co-58 Co-60 Zn-65 Gross Beta 182.0 +/- 17.9 157.0 +/- 7.0 221.0 +/- 13.6 154.0 +/- 14.2 459.0 +/- 88.0 247.0 +/- 14.5 75.9 +/- 16.4 137.0 +/- 12.2 292.0 +/- 12.1 314.0 +/- 29.0 237.0 +/- 3.0 173.0 +/- 2.9 183.0 +/- 3.1 218.0 +/- 3.7 161.0 +/-2.7 494.0 +/- 8.3 246.0 +/- 4.1 78.9 +/- 1.3 147.0 +/- 2.5 286.0 +/- 4.8 300.0 +/- 5.0 266.0 +/- 4.4 H3 256 256 Zn-65 Co-60 1-131 Cs-1 37 Cs-1 34 Ba-1 33 Gross Beta H3 1-131 110.0 +/- 9.1 73.1 +/-3.6 27.9 +/- 6.0 203.0 +/- 7.0 81.0 +/-3.0 88.7 +/- 4.6 45.4 +/- 1.8 1.55 29.1 +/-5.0 110.0 72.8 28.4 210.0 88.3 89.1 56.4 1.55 27.5 59 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Sample Type and Reported Cross Check Lab Sample Date Units Isotope Observed Laboratory's Results Results 12/09/10 12/09/10 12/09/10 12/09/10 Water -pCi/L Air Iodine- pCi Charcoal Milk- pCi/L Air particulates on filter -pCi Gross Beta 1-131 Co-58 Co-60 Fe-59 1-131 Cs-1 34 Cs-1 37 Cr-51 Mn-54 Zn-65 Mn-54 Cr-51 Cs-1 37 Cs-1 34 Zn-65 Co-60 Co-58 Fe-59 117 +/-2.00 97.0 +/- 8.00 94.0 +/- 16.0 321 +/- 19.0 165 +/- 25.0 101 +/-24.0 140 +/- 11.0 188 +/-21.0 490 +/- 123 126 +/- 17.0 193 +/- 36.0 129 +/- 9.00 505 +/- 52.0 190 +/- 10.0 130 +/- 8.00 202 +/- 21.0 304 +/- 11.0 89.0 +/- 9.00 147 +/- 13.0 122 +/- 2.04 84.2 +/- 1.41 90.2 +/- 1.51 301 +/- 5.02 131 +/-2.19 96.9 +/- 1.62 157 +/-2.62 186 +/-3.11 456 +/- 7.61 120.0 +/- 2.00 174 +/- 2.91 114 +/- 1.91 435 +/- 7.26 178 +/- 2.97 150 +/- 2.50 166 +/- 2.77 287 +/- 4.79 86.1 +/- 1.44 125 +/- 2.09'See discussion at the beginning of the Appendix 60 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Location Air Filter -Al Air Filter -A2 Air Filter -A3 Air Filter -A4 Air Filter -A5 Air Filter -SFA1 Air Filter -SFA2 Air Filter -SFA3 Air Filter -SFA4 Air Iodine -Al Air Iodine -A2 Air Filter -Al Air Filter -A2 Air Filter -A3 Air Filter -A4 Air Filter -A5 Air Filter -SFA1 Air Filter -SFA2 Air Filter -SFA3 Air Filter -SFA4 Air Iodine -A3 Air Iodine -A4 Air Filter -Al Air Filter -A2 Air Filter -A3 Air Filter -A4 Air Filter -A5 Air Filter -SFA1 Air Filter -SFA2 Air Filter -SFA3 Air Filter -SFA4 Sample Date 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 01/11/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/01/10 03/08/10 03/08/10 03/08/10 03/08/10 03/08/10 03/08/10 03/08/10 03/08/10 03/08/10 Type of Analysis *Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta 1-131 1-131 Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta 1-131 1-131 Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Original Analysis 1.9 +/- 0.2 1.5 +/- 0.2 2.1 +/-0.3 2.4 +/- 0.4 1.8 +/- 0.2 1.7 +/- 0.1 1.9 +/- 0.2 2.1 +/-0.3 2.0 +/- 0.3<MDA<MDA 1.1 +/-0.2 1.0 +/- 0.2 1.1 +/-0.2 1.7 +/- 0.3 1.3 +/- 0.1 1.0 +/- 0.1 1.3 +/- 0.1 1.1 +/-0.3 1.4 +/- 0.2<MDA<MDA 1.6 +/-0.2 1.4 +/-0.2 1.3 +/-0.2 2.1 +/-0.3 1.3 +/-0.1 1.3 +/- 0.1 1.2 +/- 0.1 1.6 +/- 0.2 1.4 +/- 0.2 Replicate Analysis 1.5 +/- 0.2 1.5 +/- 0.2 1.9 +/- 0.3 2.5 +/- 0.4 1.7 +/-0.1 1.7 +/-0.1 1.7 +/-0.2 2.3 +/- 0.3 2.0 +/- 0.3<MDA<MDA 1.1 +/-0.2 1.1 +/-0.2 1.1 +/-0.2 1.7 +/- 0.3 1.4 +/- 0.1 1.0 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.3 1.3 +/- 0.2<MDA<MDA 1.5 +/-0.2 1.6 +/-0.2 1.4 +/-0.2 2.3 +/- 0.3 1.2 +/- 0.1 1.2 +/- 0.1 1.2 +/- 0.1 1.5 +/- 0.3 1.5 +/- 0.2 Split Analysis****61 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Location Air Iodine -Al Air Iodine -A2 Oysters -IA3 Air Filters -Al Air Filters -A2 Air Filters -A3 Air Filters -A4 Air Filters -A5 Air Filters -SFA1 Air Filters -SFA2 Air Filters -SFA3 Air Filters -SFA4 Air Iodine -LB Air Iodine -TI Vegetation

-SFB1 Vegetation

-SFB2 Vegetation

-SFB3 Sample Date 03/08/10 03/08/10 03/23/10 05/03/10 05/03/10 05/03/10 05/03/10 05/03/10 05/03/10 05/03/10 05/03/10 05/03/10 05/17/10 05/17/10 05/28/10 05/28/10 05/28/10 05/28/10 05/28/10 05/28/10 06/07/10 06/07/10 06/07/10 06/07/10 06/07/10 06/07/10 06/07/10 06/07/10 06/07/10 Type of Analysis *1-131 1-131 Gamma Gamma Gamma Gamma Gamma Gamma Gamma Gamma Gamma Gamma 1-131 1-131 Gamma Gamma Gamma Original Analysis<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA Replicate Analysis<MDA<MDA<MDA.**<MDA<MDA<MDA<MDA<MDA Split Analysis<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA Soil -SFS1 Soil -SFS2 Soil -SFS3 Cs-1 37 Cs-1 37 Cs-1 37 Air Filter -Al Air Filter -A2 Air Filter -A3 Air Filter -A4 Air Filter -A5 Air Filter -SFA1 Air Filter -SFA2 Air Filter -SFA3 Air Filter -SFA4 Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta<MDA 662 +/- 35 137 +/- 55 1.8 +/-0.1 1.7 +/- 0.3 1.5 +/- 0.3 1.4 +/- 0.2 1.6 +/- 0.1 1.9 +/-0.1 1.9 +/-0.2 1.6+/-0.2 1.1 +/-0.2<MDA 92.3 +/- 29.4 152 +/- 40.3<MDA 43.1 +/- 29.4 115 +/-43.1 1.8+/-0.1 1.7 +/- 0.3 1.5 +/- 0.3 1.5 +/- 0.2 1.6 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.2 1.6 +/- 0.2 1.1 +/-0.2**62 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Sample Type of Original Replicate Split Analysis Location Date Analysis

• Analysis Analysis Air Iodine -A2 Air Iodine -A3 Air Filter -Al Air Filter -A2 Air Filter -A3 Air Filter -A4 Air Filter -A5 Air Filter -SFA1 Air Filter -SFA2 Air Filter -SFA3 Air Filter -SFA4 Shoreline Sediment -WB1 DR05 DR06 DR07 DR08 DR09 DR1 0 DR11 DR29 DR31 SFDR14 SFDR15 Air Iodine -A5 Air Iodine -SFA1 Air Iodine -SFA2 06/14/10 06/14/10 07/05/10 07/05/10 07/05/10 07/05/10 07/05/10 07/05/10 07/05/10 07/05/10 07/05/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/26/10 07/26/10 07/26/10 08/18/10 08/18/10 1-131 1-131 Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gamma<MDA<MDA 1.3 +/- 0.1 1.4 +/- 0.2 1.4 +/- 0.3 1.1 +/-0.2 1.3 +/- 0.1 1.4 +/- 0.1 1.1 +/-0.1 1.4 +/- 0.2 1.1 +/-0.2<MDA<MDA<MDA 1.3 +/- 0.1 1.3 +/- 0.2 1.2 +/- 0.3 1.1 +/-0.2 1.2 +/- 0.1 1.4 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.2 1.1 +/-0.2<MDA TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD 1-131 1-131 1-131 11.50 +/- 0.97 9.44 +/- 0.92 10.01 +/-1.12 14.24 +/- 0.75 11.10 +/- 1.32 9.86 +/- 1.00 10.37 +/- 1.34 14.44 +/- 1.78 15.64 +/- 0.85 13.95 +/- 1.66 18.79 +/- 3.57<MDA<MDA<MDA 10.90 +/- 1.51 9.99 +/- 0.53 10.30 +/- 1.37 13.96 +/- 2.10 11.19 +/- 1.21 10.41 +/- 1.07 10.34 +/- 1.41 14.55 +/- 1.81 15.04 +/- 1.24 14.84 +/- 1.83 18.60 +/- 2.07<MDA<MDA<MDA****Oysters -IA3 Oysters -IA6 Gamma Gamma<MDA<MDA<MDA<MDA<MDA<MDA 63 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Sample Type of Original Replicate Split Analysis Location Date Analysis

• Analysis Analysis Fish -IA4 08/18/10 Gamma <MDA <MDA **Water- WA2 8/30/10 Gamma <MDA <MDA <MDA Vegetation

-11B3 08/31/10 Gamma <MDA <MDA <MDA Vegetation

-114 08/31/10 Gamma <MDA <MDA <MDA Vegetation

-1B7 08/31/10 Gamma <MDA <MDA <MDA Air Iodine -Al 08/31/10 1-131 <MDA <MDA **Air Iodine -A4 08/31/10 1-131 <MDA <MDA **Air Filter -Al 08/30/10 Gross Beta 2.3 +/- 0.1 2.3 +/- 0.1 **Air Filter -A2 08/30/10 Gross Beta 1.6 +/- 0.2 1.6 +/- 0.2 **Air Filter -A3 08/30/10 Gross Beta 1.4 +/- 0.3 1.3 +/- 0.3 **Air Filter -A4 08/30/10 Gross Beta 1.8+/-0.2 1.9+/-0.2

• • Air Filter -A5 08/30/10 Gross Beta 2.1 +/- 0.1 2.2 +/- 0.1 **Air Filter -SFA1 08/30/10 Gross Beta 6.7 +/- 0.4 6.9+/- 0.4 **Air Filter -SFA2 08/30/10 Gross Beta 2.1 +/- 0.1 2.1 +/- 0.1 **Air Filter -SFA3 08/30/10 Gross Beta 2.1 +/- 0.2 2.2 +/- 0.2 **Air Filter -SFA4 08/30/10 Gross Beta 2.0 +/- 0.2 1.8 +/- 0.2 **Air Iodine -A5 09/06/10 1-131 <MDA <MDA **Air Iodine -SF1 09/06/10 1-131 <MDA <MDA **Air Filter -Al 09/07/10 Gross Beta 4.1 +/- 0.2 4.1 +/- 0.2 **Air Filter -A2 09/07/10 Gross Beta 2.3 +/- 0.2 2.7 +/- 0.3 **Air Filter -A3 09/07/10 Gross Beta 3.0 +/- 0.3 3.2 +/- 0.4 **Air Filter -A4 09/07/10 Gross Beta 3.3 +/- 0.3 3.3 +/- 0.3 **Air Filter -A5 09/07/10 Gross Beta 3.6 +/- 0.2 3.6 +/- 0.2 **Air Filter -SFA1 09/07/10 Gross Beta 4.2 +/- 0.1 4.0 +/- 0.2 **Air Filter -SFA2 09/07/10 Gross Beta 3.8 +/- 0.2 3.7 +/- 0.2 **Air Filter -SFA3 09/07/10 Gross Beta 3.9 +/- 0.3 3.6 +/- 0.3 **Air Filter -SFA4 09/07/10 Gross Beta 3.3 +/- 0.3 3.0 +/- 0.3 **64 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Sample Type of Original Replicate Split Analysis Location Date Analysis

• Analysis Analysis Air Filters -Al Air Filters -A2 Air Filters -A3 Air Filters -A4 Air Filters -A5 Air Filters -SFA1 Air Filters -SFA2 Air Filters -SFA3 Air Filters -SFA4 DR05 DR06 DR07 DR08 DR09 DR1 0 DR11 DR29 DR31 SFDR14 SFDR15 Air Filter -Al Air Filter -A2 Air Filter -A3 Air Filter -A4 Air Filter -A5 Air Filter -SFA1 Air Filter -SFA2 Air Filter -SFA3 Air Filter -SFA4 Bottom Sediment -WBS2 09/27/10 09/27/10 09/27/10 09/27/10 09/27/10 09/27/10 09/27/10 09/27/10 09/27/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/07/10 10/11/10 10/11/10 10/11/10 10/11/10 10/11/10 10/11/10 10/11/10 10/11/10 10/11/10 10/20/10 Gamma Gamma Gamma Gamma Gamma Gamma Gamma Gamma Gamma<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA<MDA TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta Gross Beta 12.47 +/- 0.95 10.69 +/- 0.76 10.46 +/- 1.16 15.83 +/- 1.56 11.90 +/- 0.77 10.98 +/- 0.97 11.17 +/- 0.74 15.17 +/- 1.35 15.75 +/- 0.93 16.61 +/- 1.87 21.09 +/- 5.39 3.5 +/- 0.2 2.7 +/- 0.2 3.3 +/- 0.3 2.8 +/- 0.2 3.0 +/- 0.2 3.6 +/- 0.2 3.0 +/- 0.2 3.5 +/- 0.3 2.8 +/- 0.2 12.94 +/- 1.93 11.11 +/- 0.94 11.63 +/- 0.39 16.71 +/- 1.92 12.36 +/- 1.20 11.85 +/- 1.35 11.57 +/- 1.20 15.63 +/- 1.18 16.75 +/- 1.40 16.96 +/- 1.32 22.13 +/- 5.45 3.5 +/- 0.2 2.6 +/- 0.2 3.0 +/- 0.3 2.4 +/- 0.2 3.1 +/-0.2 3.4 +/- 0.2 2.9+/-0.2 3.2 +/- 0.3 2.8 +/- 0.2 Cs-1 37<MDA 121 +/-6 65 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Sample Type of Original Replicate Split Analysis Location Date Analysis

• Analysis Analysis Bottom Sediment -WBS4 10/20/10 Gamma <MDA ** <MDA Fish -N 11/13/10 Gamma <MDA ** <MDA Fish -N 11/13/10 Gamma <MDA ** <MDA Intake -WA1 12/02/10 Gamma <MDA <MDA Discharge

-WA2 12/02/10 Gamma <MDA <MDA Shoreline Sediment -WB1 12/07/10 Gamma <MDA <MDA <MDA Soil -SFS2 12/07/10 Gamma <MDA <MDA **Soil -SFS3 12/07/10 Gamma <MDA <MDA **Air Iodine -Al 12/13/10 1-131 <MDA <MDA **Air Iodine -A5 12/13/10 1-131 <MDA <MDA **Air Filter -Al 12/20/10 Gross Beta 2.7 +/- 0.2 2.6 +/- 0.2 **Air Filter -A2 12/20/10 Gross Beta 2.4+/- 0.3 2.3 +/- 0.3 **Air Filter -A3 12/20/10 Gross Beta 2.8+/-0.3 2.6+/-0.3

• • Air Filter -A4 12/20/10 Gross Beta 2.8 +/- 0.3 3.0 +/- 0.3 **Air Filter -A5 12/20/10 Gross Beta 2.3+/-0.1 2.4+/-0.2

• • Air Filter -SFA1 12/20/10 Gross Beta 2.7 +/- 0.2 2.6 +/- 0.1 **Air Filter -SFA2 12/20/10 Gross Beta 2.6 +/- 0.2 2.5 +/- 0.2 **Air Filter -SFA3 12/20/10 Gross Beta 2.6 +/- 0.3 2.8 +/- 0.3 **Air Filter -SFA4 12/20/10 Gross Beta 2.2 +/- 0.2 2.0+/- 0.2 **Intake -WA1 12/30/10 Gamma <MDA <MDA <MDA Discharge

-WA2 12/30/10 Gamma <MDA <MDA <MDA See discussion at the beginning of the Appendix*Units for Gross Beta results are 10 2 pCi/m 3** The nature of these samples precluded splitting them with an independent laboratory.

66 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE C-3 Selected Nuclides H-3 Na-22 Cr-51 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Ru-106 Ag-1 10 Te-129r 1-131 Cs-134 Cs-137 BaLa-14 Ce-144 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry Bay Water Fish Shellfish Sediment Vegetation F s pCi/I pCi/kg pCi/kg pCi/kg pCi/kg 1 175 ........1 8 3 12 6 12 105 4 104 50 1 9 3 12 5 1 9 4 9 4 3 28 9 24 10 1 9 4 12 5 2 20 8 25 10 1 12 7 14 6 2 18 8 20 9 9 75 30 90 41 n 1 10 10 10 5 n 16 131 60 162 79 4 65 30 35 22 1 8 4 10 5 1 9 4 10 5 0 3 32 15 25 14 7 40 16 54 26'articulates 0-3 pCi/m 3 5 63 4 5 12 6 9 9 9 40 4 95 74 4 4 36 18 67 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 APPENDIX D Land Use Survey Appendix D contains the results of a Land Use Survey conducted around Calvert Cliffs Nuclear Power Plant during this operating period. A table listing the raw data of this survey and a discussion of the results are included in this appendix.Discussion Land Use Survey A Land Use Survey was conducted to identify, within a distance of 5 miles, the location of the nearest milk animal, the nearest residence, and the nearest garden greater than 50 m 2 in each of the nine sectors over land. A detailed description of the Land Use Survey is given in a separate document (Ref. 9). The position of the nearest residence and garden in each sector out to 5 miles is given in the adjacent table. There are no animals producing milk for human consumption within the 5 mile radius. *The nearest garden/resident location has changed since 2009.The use of GPS was used to determine distances from the centerline of containment.

Distance From Plant (miles)Sector Residence Garden SE 1.5 1.5 SSE 1.6 2.4*S 1.6 1.6 SSW 1.5 1.8 SW 1.1 1.1 WSW 1.3 1.4*W 1.3 1.3 WNW 2.7 2.7 NW 2.0 2.1 The closest residence is situated in the SW sector and the nearest garden is also in the SW sector, which is one of the least prevalent wind directions.

In the S, SSE, and SE sectors, there is the highest probability of wind blowing from the direction of the plant. The two gardens used for vegetable samples by the REMP have been placed in the sectors with the highest X/Q. One sampling garden is located in the S sector at a distance of 0.4 miles, and another is situated near the site boundary in the SSE sector at a distance of 1.6 miles from the plant. These two sampling sites are considered good indicator locations for radioactive depositions around the plant.The dose assessment using this operating period meteorological data was performed, and no significant impact from the plant was found.68 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 APPENDIX E Additional Samples and Analysis Results Appendix E is a presentation of the analytical results for additional samples collected in the environs of CCNPP. These extra samples are not required by the ODCM (Ref. 6). Table E-1 lists the locations of all the additional samples and the remaining tables in this appendix provide the results. Some of these samples were collected and analyzed to maintain the historical continuity for samples and sampling pathways discontinued when the Environmental Technical Specifications were changed in March, 1985. Additionally, they include the PICs added for the ISFSI.Table E-4 through E-10 contain analytical results for samples taken from the various radiological pathways (i.e., aquatic, atmospheric, terrestrial, and direct radiation) surrounding the plant. In general these results continue the historical trends previously observed in the official sites of the CCNPP REMP and ISFSI.Table E-I 1 shows the direct radiation readings from TLDs placed at the perimeter of the Resin Storage Area which is temporary waste resin storage and cask transfer area located to the west of the ISFSI facility.

The TLD values are somewhat higher than those in the REMP program due to their proximity to this source of the radiation.

However, when the direct radiation readings for the Resin Storage Area are compared with those from the ISFSI and Site Boundary TLDs, it is apparent that temporary storage of spent resin and cask transfers are having no significant, measurable effect on the environs surrounding CCNPP.The NEI Industry Groundwater Protection Initiative was established to determine the potential impact nuclear power plants may have on the surrounding environment due to unplanned releases of radioactive liquids. Under the Groundwater Protection Initiative, groundwater monitoring is accomplished through routine sampling of the water table around the plant and analysis for gamma and tritium.In 2010 a deer population control program was initiated on the Calvert Cliffs site. 24 deer were harvested by Calvert Cliffs employees for consumption.

Venison samples were collected from deer harvested on-site and deer harvested outside of the 10 mile radius, and the analysis results were similar. Thus it was concluded that this meat consumption pathway is not a significant source of dose.Groundwater samples were collected from six on-site piezometer tubes in 2010. A piezometer tube is a shallow monitoring well which allows access to groundwater at a depth of approximately 40 feet beneath the site. Number 19 piezometer tube was added to the program in 2010, 3 additional wells were installed in December of 2010 and will be included in 2011 monitoring.

Of the piezometer tubes sampled, only # 11 piezometer tube showed any plant related activity.

This activity was previously identified and evaluated in December of 2005. The activity consists of tritium originating from normal rad waste discharges and was previously reported in the Annual Radioactive Release Reports. The tritium contamination is contained on site. No drinking water has been affected; the groundwater at this location does not impact any drinking water pathway. The 2010 analysis results for Tritium are shown in Table E-12 and analysis results for gamma emitting radionuclides are shown in Table E-13.69 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS -ANALYTICAL RESULTS Table Title Page E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear P o w er P lant ..............................................................................................................................

7 1 E-2 Synopsis of 2010 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program ....................................................................................

72 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units I & 2 Non-Tech Spec Radiological Environmental Monitoring Program .............................

..........................

73 E-4 Concentration of Gamma Emitters in Bottom Sediment ...................................................

74 E-5 Concentration of Iodine-131 in Filtered Air .......................................................................

75 E-6 Concentration of Beta Emitters in Air Particulates

...........................................................

77 E-7 Concentration of Gamma Emitters in Air Particulates

.......................................................

79 E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water ...................

80 E-9 Direct Radiation as Measured in Pressurized Ion Chamber ...............................................

81 E -10 D irect R adiation .......................................................................................................................

82 E-11 Direct Radiation from Resin Storage Area .........................................................................

83 E-12 Concentration of Tritium in Groundwater

.........................................................................

84 E-13 Gross Concentration of Gamma Emitters ...........................................................................

85 Figure Title Page Figure E-1 Site Map of Groundwater Monitoring Wells ..............................................................

86 70 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 TABLE E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant Station Description Distance' Direction'(KM) (Miles) (Sector)A6 Long Beach 4.4 2.7 NW A7 Taylors Island, Anderson's Property 12.4 7.7 ENE A8 Cambridge, U of MD Estuarine Center 32.0 19.9 NE DR24 Route 4 and Parran Road 3.0 1.9 SW DR25 Camp Conoy Guard House 1.0 0.6 S DR26 Route 235 & Clarks Landing Rd. 20.5 12.7 SW DR27 Route 231 & Route 4 23.0 14.3 NW DR28 Taylors Island Emergency Siren #35 12.3 7.6 ENE DR29 Taylors Island Emergency Siren #38 12.5 7.8 E DR31 Cambridge, U of MD Estuarine Center 32.0 19.9 NE DR32 Twining Property, Taylors Island 12.3 7.6 NE DR33 P.A. Ransome Property, Taylors Island 14.8 9.2 ESE DR34 Shoreline at Barge Road 0.2 0.1 NE OSGDR1 North of Old Steam Generator Storage Facility 0.3 0.2 SW OSGDR2 West of Old Steam Generator Storage Facility 0.3 0.2 SW PICI Taylors Island, Anderson's Property 12.4 7.7 ENE PIC2 On Site before Entrance to Camp Conoy 0.7 0.4 S PIC3 Meteorological Station 0.8 0.5 WSW PIC4 NNW of ISFSI 0.6 0.4 SW PIC5 SSE of ISFSI 0.6 0.4 SSW PIC8 CCNPP Visitor's Center 0.3 0.2 NW RPDR5 Resin Storage Area -North Fence Lower 0.7 0.4 SW RPDR6 Resin Storage Area -North Fence Upper 0.7 0.4 SW RPDR7 Resin Storage Area -West Fence Right 0.7 0.4 SW RPDR8 Resin Storage Area -West Fence Left 0.7 0.4 SW RPDR9 Resin Storage Area -South Fence Upper 0.7 0.4 SW RPDRIO Resin Storage Area- South Fence Lower 0.7 0.4 SW RPDRI 1 Resin Storage Area -East Fence Left 0.7 0.4 SW RPDR12 Resin Storage Area -East Fence Right 0.7 0.4 SW WBS2 Discharge Area 0.3 0.2 N WBS4 Camp Conoy/Rocky Point 3.0 1.9 SE WWI Taylors Island, Anderson's Property 12.4 7.7 ENE'Distance and direction from the central point between the two containment buildings.

71 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-2 Synopsis of 2010 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program Sample Type Sampling Frequency 1 Number of Locations Number Collected Analysis Analysis Frequency 1 Number Analyzed Aquatic Environment Bottom Sediment Atmospheric Environment Air Iodine 2 Air Particulates 3 Direct Radiation Pressurized Ion Chamber Ambient Radiation Terrestrial Environment Ground water Q 2 4 Gamma SA 4 W W 7 3 362 154 1-131 Gross Beta Gamma W W MVC 362 154 36 M Q 6 20 72 480 Gamma TLD M Q 72 480 M 1 12 Gamma H-3 M M 12 12' W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 The collection device contains silver Zeolite 3 Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 72 January 1 -December 3 1, 2010 Docket Nos. 50-317/50-318/72-8 Table E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analyses Performed Lower Limit of Detection (LLD)Indicator Locations Mean (F)/Range 1 Location with Highest Annual Mean Name/Distance

&Direction 2 Highest Annual Mean (F) / Range 1 Control Locations Mean (F)/Range Aquatic Environment Bottom Sediment (pCi/kg)Atmospheric Environment Air Particulates (10-2 pCi/m 3)Direct Radiation Pressurized Ion Chamber (mR/30 days)Ambient Radiation (mR/90 days)Gamma (4)Cs-1 37 17 115 (2/2)(113-118)Camp Conoy/Rocky Point WBS4 3.0 km SE 147 (2/2)(124-171)147 (2/2)(124-171)Gross Beta (156)0.5 2.1 (102/104)(0.8-5.0)Long Beach LB 4.4 km NW NNW of ISFSI PIC4 0.6 km SW South Fence Lower RPDRI0 2.2 (52/52)(1.1-4.0)1.8 (51/52)(0.8-3.1)Ionization Chamber (72)6.64 (60/60)(4.45-16.95) 11.48 (12/12)(9.93-16.95) 55.94 (24/24)(48.60-67.22) 5.93 (12/12)(5.46-6.29)

TLD (474)22.51 (474/474)(8.73-107.06) km 1Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses 2 From the centerpoint of the ISFSI facility 73 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-4 Concentration of Gamma Emitters in Bottom Sediment (Results in units of pCi/kg (dry) +/- 2c)Sample Code Sample Date Cs-1 37 Gamma Emitters WBS2 Discharge Area 6/22/2010 113 +/-54 10/20/2010 118+/-30 WBS4 1 Camp Conoy/ Rocky Point 6/22/2010 171 +/- 59 10/20/2010 124+/-32 Control Location* All Non-Natural Gamma Emitters <MDA 74 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m 3+/- 2ar)Start Date Stop Date CA LB Cambridge LONG BEACH SFA1 MET Station SFA2 1 Visitors Center SFA3 NNW of ISFSI SFA4 SSE of ISFSI TI 1 TAYLOR'S ISLAND 12/28/2009 1/4/2010 1/11/2010 1/18/2010 1/25/2010 2/1/2010 2/15/2010 2/22/2010 3/1/2010 3/8/2010 3/15/2010 3/22/2010 3/29/2010 4/5/2010 4/12/2010 4/19/2010 4/26/2010 5/3/2010 5/10/2010 5/17/2010 5/24/2010 5/31/2010 6/7/2010 6/14/2010 6/21/2010 6/28/2010 7/5/2010 1/4/2010 1/11/2010 1/18/2010 1/25/2010 2/1/2010 2/15/2010 2/22/2010 3/1/2010 3/8/2010 3/15/2010 3/22/2010 3/29/2010 4/5/2010 4/12/2010 4/19/2010 4/26/2010 5/3/2010 5/10/2010 5/17/2010 5/24/2010 5/31/2010 6/7/2010 6/14/2010 6/21/2010 6/28/2010 7/5/2010 7/12/2010*k"**k*k"**********k"*"*"**k*2*t"k"k"*"*"k"k 75 January 1 -December 3 1, 2010 Docket Nos. 50-317/50-318/72-8 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m 3+/- 2a)Start Date Stop Date CA LB Cambridge LONG BEACH SFA1 MET Station SFA2 1 Visitors Center SFA3 NNW of ISFSI SFA4 SSE of ISFSI TI 1 TAYLOR'S ISLAND 7/12/2010 7/19/2010 7/26/2010 8/2/2010 8/9/2010 8/16/2010 8/23/2010 8/30/2010 9/6/2010 9/13/2010 9/20/2010 9/27/2010 10/4/2010 10/11/2010 10/18/2010 10/25/2010 11/1/2010 11/8/2010 11/15/2010 11/22/2010 7/19/2010 7/26/2010 8/2/2010 8/9/2010 8/16/2010 8/23/2010 8/30/2010 9/6/2010 9/13/2010 9/20/2010 9/27/2010 10/4/2010 10/11/2010 10/18/2010 10/25/2010 11/1/2010 11/8/2010 11/15/2010 11/22/2010 11/29/2010 2 3"**k"k"k"k.*-k 11/29/2010 12/6/2(12/6/2010 12/13/2(12/13/2010 12/20/2(12/20/2010 12/27/2(12/27/2010 1/3/2('Control Location 2 Power outage Sampler malfunction/low flow* <MDA)10)10)10)10)11'k'A""k*k*k***"k 76 January 1 -December 3 1, 2010 Docket Nos. 50-317/50-318/72-8 Table E-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m 3+/- 2or)Start Date Stop Date CA Cambridge LB LONG BEACH TI'TAYLOR'S ISLAND 12/28/2009 1/4/2010 1/11/2010 1/18/2010 1/25/2010 2/1/2010 2/15/2010 2/22/2010 3/1/2010 3/8/2010 3/15/2010 3/22/2010 3/29/2010 4/5/2010 4/12/2010 4/19/2010 4/26/2010 5/3/2010 5/10/2010 5/17/2010 5/24/2010 5/31/2010 6/7/2010 6/14/2010 6/21/2010 6/28/2010 7/5/2010 7/12/2010 7/19/2010 7/26/2010 8/2/2010 8/912010 8/16/2010 8/23/2010 8/30/2010 9/6/2010 9/13/2010 9/20/2010 9/27/2010 10/4/2010 10/11/2010 1/4/2010 1/11/2010 1/18/2010 1/25/2010 2/1/2010 2/15/2010 2/22/2010 3/1/2010 3/8/2010 3/15/2010 3/22/2010 3/29/2010 4/5/2010 4/12/2010 4/19/2010 4/26/2010 5/3/2010 5/10/2010 5/17/2010 5/24/2010 5/31/2010 6/7/2010 6/14/2010 6/21/2010 6/28/2010 7/5/2010 7/12/2010 7/19/2010 7/26/2010 8/2/2010 8/9/2010 8/16/2010 8/23/2010 8/30/2010 9/6/2010 9/13/2010 9/20/2010 9/27/2010 10/4/2010 10/11/2010 10/18/2010 2.7 +/- 0.4 1.8 +/- 0.2 2.3 +/- 0.3 1.8 +/- 0.2 2.6 +/- 0.3 1.6 +/- 0.2 2.3 +/- 0.3 1.1 +/-0.2 1.9 +/- 0.2 2.0 +/- 0.3 2.0 +/- 0.3 1.0 +/- 0.2 1.2 +/- 0.2 2.3 +/- 0.3 1.7 +/-0.2 1.8 +/- 0.2 1.8 +/- 0.3 1.4 +/- 0.2 1.4 +/- 0.2 0.8 +/- 0.2 1.1 +/-0.2 1.6 +/- 0.3 1.7 +/- 0.2 1.5 +/- 0.2 2.1 +/-0.2 1.5 +/- 0.2 1.9 +/- 0.3 2.2 +/- 0.2 1.4 +/-0.2 1.8 +/- 0.2 2.2 +/- 0.2 2 2.8 +/- 0.3 3 4.6 +/- 0.3 2.1 +/-0.3 3.1 +/-0.3 2.7 +/- 0.3 2.9 +/- 0.4 3.9 +/- 0.4 5.0 +/- 0.5 77 2.6 +/- 0.3 2.1 +/- 0.2 3.3 +/- 0.3 2.0 +/- 0.3 3.8 +/- 0.4 2.2 +/- 0.2 2.2 +/- 0.3 1.5 +/- 0.2 1.8 +/- 0.2 3.2 +/- 0.5 2.0 +/- 0.3 1.9 +/- 0.2 1.1 +/-0.2 2.4 +/- 0.3 2.2 +/- 0.2 1.8 +/- 0.2 1.6 +/-0.2 1.4 +/- 0.2 1.1 +/-0.2 1.1 +/-0.3 1.6 +/- 0.3 1.5 +/- 0.2 1.5 +/- 0.2 1.5 +/-0.2 2.4 +/- 0.3 1.3 +/- 0.2 2.6 +/- 0.3 2.4 +/- 0.3 1.7 +/- 0.3 2.1 +/-0.3 1.8 +/-0.2 2.2 +/- 0.3 3.0 +/- 0.3 2.0 +/- 0.3 3.4 +/- 0.3 2.1 +/-0.3 3.3 +/- 0.3 4.0 +/- 0.4 1.6 +/- 0.2 3.2 +/- 0.3 2.9 +/- 0.3 2.4 +/- 0.3 2.3 +/- 0.2 3.1 +/-0.3 1.6 +/- 0.3 2.5 +/- 0.3 1.5 +/- 0.2 2.0 +/- 0.2 1.0 +/- 0.2 2.0 +/- 0.2 1.7 +/- 0.2 1.9 +/- 0.2 1.3 +/- 0.2 1.0 +/- 0.2 1.9 +/- 0.3 1.8 +/- 0.2 2 1.5 +/- 0.2 1.4 +/- 0.2 1.3 +/- 0.2 0.8 +/- 0.2 1.1 +/-0.2 1.3 +/- 0.2 1.5 +/- 0.2 1.5 +/-0.2.1.7 +/- 0.2 1.1 +/-0.2 2.4 +/- 0.3 2.1 +/- 0.2 2.0 +/- 0.2 1.6 +/- 0.2 2.5 +/- 0.2 1.8 +/- 0.2 2.9 +/- 0.3 1.4 +/- 0.2 3.1 +/-0.3 1.2 +/- 0.2 2.0 +/- 0.2 1.5 +/- 0.2 1.1 +/-0.2 2.4 +/- 0.3 2.5 +/- 0.3 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m 3+/- 2a)Start Date Stop Date CA Cambridge LB LONG BEACH TI 1 TAYLOR'S ISLAND 10/18/2010 10/25/2010 1.8+/-0.2 2.5+/-0.3 1.9+/-0.2 10/25/2010 11/1/2010 2.0+/-0.2 2.0+/-0.3 1.2+/-0.2 11/1/2010 11/8/2010 1.2 +/-0.2 1.1 +/-0.2 1.2 +/-0.2 11/8/2010 11/15/2010 1.6+/-0.2 2.0+/-0.2 1.3+/-0.3 11/15/2010 11/22/2010 3.2+/-0.3 3.5 +/-0.3 2.0 +/-0.3 11/22/2010 11/29/2010 2.5 +/- 0.2 2.7 +/- 0.3 1.8 +/- 0.2 11/29/2010 12/6/2010 2.1 +/-0.3 1.9 +/-0.2 1.7 +/-0.3 12/6/2010 12/13/2010 1.2+/-0.2 2.1 +/-0.3 1.6+/-0.2 12/13/2010 12/20/2010 2.2 +/-0.3 2.7 +/-0.2 2.1 +/-0.3 12/20/2010 12/27/2010 1.3 +/- 0.2 1.4 +/- 0.2 1.2 +/- 0.2 12/27/2010 1/3/2011 2.5 +/-0.4 3.0 +/-0.3 2.5 +/-0.4 Control Location 2 Power outage 3 Sampler malfunction/low flow* <MDA 78 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10-3 pCi/m 3+/- 2a)Sample Date CA Cambridge LB LONG BEACH TI 1 TAYLOR'S ISLAND 2/1/2010 * * *3/1/2010 * * *3/29/2010

• * *5/3/2010 * * *5/31/2010

• * *6/28/2010

• * *8/2/2010 * * *8/30/2010

• * *9/27/2010

• * *11/1/2010

• * *11/29/2010

• * *1/3/2011 * * *Control Location* All Non-Natural Gamma Emitters <MDA 79 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-8 Co ncentration of Tritium and Gamma Emitters in Taylors Island Well Water (Results in units of 10-3 pCi/m 3 +/- 2ca)Gamma Emitters H-3 Sample Date 1/19/2010 2/22/2010 3/22/2010 4/26/2010 5/17/2010 6/21/2010 7/8/2010 8/23/2010 9/20/2010 10/18/2010 11/22/2010 12/20/2010

• Non-Natural Gamma Emitters <MDA"**/*t<200<200<200<200<204<200<291<291<291<303<303<303"k*k 80 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-9 Direct Radiation as Measured in Pressurized Ion Chamber (Results in units of mR/30 days +/- 10%)Sample Code Month Month PICl1 Taylor's Island PIC2 Entrance to Camp Conoy PIC3 MET Station JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV 5.82 +/- 0.58 5.91 +/- 0.59 5.92 +/- 0.592 6.18 +/- 0.62 6.29 +/- 0.63 5.76 +/- 0.58 4.95 +/- 0.50 5.15 +/- 0.52 4.57 +/- 0.462 4.70 +/- 0.47 4.67 +1- 0.47 4.45 +/- 0.45 5.39+/- 0.54 5.41 +/- 0.54 5.04 +/- 0.502 5.88 +/- 0.59 5.20 +/- 0.52 5.12 +/- 0.51 FEB APR JUN AUG OCT.DEC FEB APR JUN AUG OCT DEC FEB APR JUN AUG OCT DEC FEB APR JUN AUG OCT DEC FEB APR JUN AUG OCT DEC FEB APR JUN AUG OCT DEC 4.70 +/-5.85 +/-4,59 +/-4.62 +/-4.71 +/-4.46 +/-4.99 +/-5.19 +/-5.07 +/-5.12 +/-5.25 +/-5.33 +/-9,93 +/-10.27 +/-10.76 +/-16.95 +/-13.95 +/-12.42 +/-0.47 0.59 0.46 0.46 0.47 0.45 0.50 0.52 0.51 0.51 0.52 0.53 0.99 1.03 1.08 1.70 1.402 1.24 5.46 +/- 0.55 5,97 +/- 0.60 6,22 +/- 0.62 6.11 +/- 0.612 5.74 +/- 0.57 5.93 +/- 0.59 PIC4 NNW of ISFSI 10.35 +/-10.32 +/-10.77 +/-10.91 +/-11.17 +/-11.75 +/-1.04 1.03 1.082 1.09 1.12 1.18 PIC5 SSE of ISFSI 6.50 +/- 0.65 6.40 +/- 0.643 6.49 +/- 0.652 6.48 +/- 0.65 6.50 +/- 0.65 6.56+/- 0.66 5.23 +/- 0.52 5.42 +/- 0.54 5.59 +/- 0.562 5.26 +/- 0.532 5.30 +/- 0.53 5.19 +/- 0.522 6.02 +/- 0.60 6.38 +/- 0.64 6.21 +/- 0.62 6.39 +/- 0.64 6.60 +/- 0.66 7.14 +/- 0.71 4.93 +/- 0.49 5.04 +/- 0.50 5.23 +/- 0.52 5.23 +/- 0.522 5.20 +/- 0.52 5.26 +/- 0.53 PIC8 Visitor's Center' Control Location 2 Instrument being serviced 3 Power outage 81 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-10 Site Code DR24 DR25 DR26 DR27 DR28 DR29 DR31 DR32 Location Rt. 4 and Parran Rd.Camp Conoy Guard House Rt. 235 and Clark's Landing Road Rt. 231 and Rt. 4 Taylors Is. Siren #35 Taylors Is. Siren #38 Cambridge Twining Property, Taylors Island P. A. Ransome Property Shoreline at Barge Rd.North of Old Steam Generator Storage Facility West of Old Steam Generator Storage Facilitv Direct Radiation (Results in units of mR/90 days +/- 2a)First Quarter Second Quarter 11.40 +/- 1.71 10.86 +/- 1.03 13.17 +/- 1.70 11.49+/- 1.42 10.56 +/- 0.79 11.37 +/-13.59+/-14.36 +/-14.47 +/-13.86 +/-0.25 1.11 0.39 1.61 1.08 10.08 +/- 0.83 9.87 +/- 1.152 12.93 +/- 0.95 13.69 +/- 1.71 14.83 +/- 0.85 13.88 +/- 1.40 13.82 +/- 2.06 8.73 +/- 0.38 17.69 +/- 1.18 15.04 +/- 1.75 Third Quarter 12.18 +/- 0.97 14.04 +/- 0.59 11.22 +/- 0.94 11.25 +/- 0.64 15.05 +/- 1.28 15.00 +/- 0.95 15.42 +/- 1.96 16.25 +/- 1.31 16.96 +/- 1.48 10.10 +/- 1.19 19.48 +/- 1.24 15.89 +/- 1.33 Fourth Quarter 12.06 +/- 0.57 13.07 +/- 0.28 11.38 +/- 1.36 11.15 +/-14.64 +/-15.52 +/-16.26 +/-15.25 +/-16.05 +/-10.20 +/-18.64 +/-1.22 1.58 2.05 1.15 1.49 0.90 1.40 1.00 DR33 DR34 OSGI OSG2 14.79 +/- 0.88 9.78 +/- 1.07 18.43 +/- 1.80 16.23 +/- 2.52 16.51 +/- 2.88 82 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-11 Site Code RPDR05 RPDR06 RPDR07 RPDR08 RPDR09 RPDR10 RPDR11 RPDR12 Location North Fence Lower North Fence Upper West Fence Right West Fence Left South Fence Upper South Fence Lower East Fence Left East Fence Right Direct Radiation from Resin Storage Area (Results in units of mR/90 days +/- 2y)First Quarter Second Quarter 37.47 +/- 6.98 22.18 +/- 3.28 48.75 +/- 5.99 37.60 +/- 2.26 107.1 +/- 9.17 33.86 +/- 2.89 22.73 +/- 1.91 16.87 +/- 1.19 22.97 +/- 3.46 18.58 +/- 1.81 67.22 +/- 5.99 48.60 +/- 7.01 42.81 +/- 1.48 33.15 +/- 3.80 36.29 +/- 3.15 30.10 +/- 1.88 Third Quarter 16.08 +/- 2.24 26.00 +/- 2.27 34.02 +/- 2.64 19.28 +/- 1.31 20.14 +/- 1.19 50.11 +/- 12.10 43.39 +/- 6.74 34.60 +/- 3.91 Fourth Quarter 16.95 +/- 2.60 26.32 +/- 1.60 33.90 +/- 2.43 20.80 +/- 1.90 24.26 +/- 0.88 57.82 +/- 11.24 51.23 +/- 5.79 35.74 +/- 6.86 83 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-12 Concentration of Tritium in Groundwater (Results in units of 10-3 pCi/m 3+/- 2a)Sample Date Piezometer Tube #s 11 12 13 15 18 19 03/06/2010

<202 <203 <203 <203 <202 04/09/2010

<203 <220 <220 <220 <220 07/30/2010 412+/-67.9

<178 <176 <179 <181 10/25/2010 739 +/-180 <295 <289 <289 <293 <293 84 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Table E-13 Gross Concentration of Gamma Emitters (Results in units of pCi/L +/- 2c)E- 13 Gross Concentration of Gamma Emitters Sample Date Piezometer Tube #s 11 12 13 15 18 19 03/06/2010

• * * * * --04/09/2010

• * * * * --07/30/2010

• * * * * --10/25/2010

• * * * * **All Non-Natural Gamma Emitters < MDA 85 January 1 -December 31, 2010 Docket Nos. 50-317/50-318/72-8 Figure E-1 Site Map Groundwater Monitoring Wells 10 OUfIIALL V P p~~~~~ M U h Odg!M dra~nj byjJ. Gres Modlrd by P.Ccrfhrm 86