Text

Independent Spent Fuel Storage Installation, Annual Radiological Environmental Operating Report
	ML071590393
Person / Time
Site:	Calvert Cliffs
Issue date:	05/10/2007
From:	Serita Sanders; Constellation Energy Group
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML071590393 (113)
	v • d • e

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Constellation Generation Group, LLC Lusby, Maryland 20657 0 Constellation Energy May 10, 2007 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant; Unit Nos. I & 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 2006.

Should you have questions regarding this matter, please contact Mr. Jay S. Gaines at (410) 495-5219.

S/ry truly yours, Steven R. Sanders General Supervisor - Chemistry SRS/CAN/bjd

Attachment:

As stated cc: D. V. Pickett, NRC R. I. McLean, DNR S. J. Collins, NRC R. Manley, MDE Resident Inspector, NRC

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, 2006 A. M. Barnett L. J. Bartal, Ph.D.

B. D. Nuse CONSTELLATION ENERGY CONSTELLATION GENERATION GROUP, LLC APRIL 2007

(LEFT BLANK)

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS LIST O F FIGURES ........................................................................................................................... iii LIST O F TABLES ............................................................................................................................... v I. SUM MARY ....................................................................................................................................... 1 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ............................................................ 3 II.A. INTRODUCTION ................................................................................................................................................. 3 II.B. PROGRAM ............................................................................................................................................................. 3 II.B .1 Ob e iectives ....................................................................................................................................................... 3 II.B.2 Sample Collection .......................................................................................................................................... 4 II.B3.3 Data Interpretation ....................................................................................................................................... 4 II.B P.4Program Exceptions ...................................................................................................................................... 4 II.C. RESULTS AND DISCUSSIONS .......................................................................................................................... 4 II.C.1 Aquatic Environment .................................................................................................................................... 5 I.C.l.a Bay W ater ................................................................................................................................................... 5 II.C.l.b Aquatic Organisms .................................................................................................................................... 5 II.C..c Shoreline Sediment ..................................................................................................................................... 5 II.C.2 Atmospheric Environment ................. !.......................................................................................................... 8 II.C.2.a Air Particulate Filters ................................................................................................................................ 8 II.C.2.b Air Iodine ....................................................................................................... ............................................ 8 II.C.3 Terrestrial Environment .......................................................................................... 8 II.C.3.a Vegaetation ................................................................................................................................................. 10 II.C.4 Direct Radiation .......................................................................................................................................... 10 II.D. CONCLUSION ..................................................................................................................................................... 12 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ...................................................... 21 III.A. INTRODUCTION .............................................................................................................................................. 21 III.B. PROGRA M ......................................................................................................................................................... 21 III.B.1 Objectives .................................................................................................................................................... 21 III.B.2 Sample Collection ...................................................................................................................................... 22 III.B.3 Data Interpretation .................................................................................................................................... 22 1II.B.4 Program Exceptions ..................................................................................................... :............................ 22 III.C. RESULTS AND DISCUSSIONS ....................................................................................................................... 22 III.C.1 Atmospheric Environment ...................................... .................................................................................. 22 III.C. a Air Particulate Filters ............................................................................................................................. 22 III.C.2 Terrestrial Environment ........................................................................................................................... 23 III.C.2.a Veeetation ................................................................................................................................................ 23 III.C .2.b Soils .......................................................................................................................................................... 23 III.C.3 Direct Radiation .......................................................................................................................................... 24 III.D. CONCLUSION ................................................................................................................................................ 24 IV. REFERENCES ............................................................................................................................ 28 APPENDIX A Sample Locations for the REMP and the ISFSI ............................................. 29 APPENDIX B Analysis Results for the REMP and the ISFSI ................................................. 45 APPENDIX C O uality Assurance Program ........................................................................ ........... 69 APPENDIX D Land Use Survey ........................................... 87 APPENDIX E Additional Samples and Analysis Results ........................................................ 89

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) ii

January 1 - December 31, 2006 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 .............. 15 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition .............. 17 7 Mean TLD Gam m a Dose, ISFSI ......................................................................................... 25 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs N uclear Pow er Plant ............................................................................................................ 35 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles .................................. 37 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ................................ 39 A-4 Independent Spent Fuel Storage Installation Sampling Locations ..................................... 42 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ........ 43 iii

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) iv

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES Table Title Page 1 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Radiological Environmental M onitoring Program ............................................................................................................ 19 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Plant Units 1 and 2 ........................................................................................................................... 20 3 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program .......................................... 26 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation ............................................................. 27 A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..33 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs ........... \.................................................................................. 41 B-i Concentration of Tritium and Gamma Emitters in Bay Water .......................................... 49 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish .......................................... 50 B-3 Concentration of Gamma Emitters in Oyster Samples ...................................................... 51 B-4 Concentration of Gamma Emitters in Shoreline Sediment ................................................. 52 B-5 Concentration of Iodine- 1-31 in Filtered Air ...................................................................... 53 B-6 Concentration of Beta Emitters in Air Particulates ............................................................ 55 B-7 Concentration of Gamma Emitters in Air Particulates ...................................................... 59 B-8a Concentration of Gamma Emitters in Vegetation Samples ...................... 60 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the IFSFI ..... 61 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 62 B-10 Typical MDA Ranges for Gamma Spectrometry ............................................................... 63 B-11 Typical LLDs for Gamma Spectrometry ........................................................................... 64 B -12 D irect R adiation ....................................................................................................................... 65 C-1 Results of Participation in Cross Check Programs ............................................................. 73 C-2 Results of Quality Assurance Program ................................................................................ 76 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ....................... 85 D -i L and U se Survey ...................................................................................................................... 87 E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear P ow er P lant .............................................................................................................................. 92 E-2 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program .................................................................................. 93 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program ............................................................. 94 E-4 Concentration of Gamma Emitters in Bottom Sediment ................................................... 95 E-5 Concentration of Iodine- 131 in Filtered Air ...................................................................... 96 E-6 Concentration of Beta Emitters in Air Particulates ................................................................. 98 V

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES - Continued Table Title Page E-7 Concentration of Gamma Emitters in Air Particulates .......................................................... 100 E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water ..................... 101 E-9 Direct Radiation as Measured in Pressurized Ion Chamber .................................................. 102 E -10 D irect R adiation ..................................................................................................................... 103 E-il Direct Radiation from Resin Storage Area ............................................................................ 104 vi

January 1 - December 31, 2006 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 3592 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 654 radiochemical analyses were performed on 586 environmental samples and 537 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, 357 radiochemical analyses were performed on 297 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, 583 analyses were performed on 535 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, 2006 Docket Nos. 50-317/50-318/72-8 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 and silver zeolite molecular sieve cartridges, respectively. The particulate filters were analyzed for beta activity and gamma emitting nuclides. The 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 3592 radiological analyses performed. Low levels of man-made fission products were also observed in 17 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 5.16 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;

b. a maximum whole body dose of 3.81 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 40CFR190;

c. a maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 1.00 x 10-2 mrem to the skin. This dose isless than 0.05% of the allowable limit of 25 mrem/yr as specified in 40CFR190.

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, 2006 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-i.

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 thebody 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 I and 2.

ll.B. PROGRAM II.B.1 Obeectives 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, 2006 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).

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 was a program exception during this operating period. Samples of collards (sample codes IbI and Ib7), cabbage (sample codes Ib2 and Ib8), and broccoli (sample codes Ib3 and Ib9) were not taken from the garden locations Bay Breeze Road and the EOF during the month of August as required by the ODCM (Ref. 6). No substitute samples were collected from the natural vegetation around the locations in lieu of the samples not taken from these locations in the August sampling period. This program exception has been entered into the site's Corrective Action Program to ensure it does not recur.

II.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).

4

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 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.

II.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, revealed no evidence of tritium in any of the samples taken from either site throughout the year.

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 Ia5). 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 (Ia6).

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.l.c 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, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE 1 Tritium in Chesapeake Bay Water 1200 1000 800 600 I. 400 -

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6

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE 2 Silver-1Orm and Potassium-40 in Chesapeake Bay Oysters 0.2 0.18 0.16 0,14 0.12 0.1

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January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 II.C.2 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters 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 0.8 x 10-2 to 4.4 x 10-2 pCi/m 3 for the indicator locations and 1.0 x 10-2 to 4.0 x 10-2 pCi/m 3 at the control lo-cation. The location with the highest overall mean of 2.1 x10- 2 pCi/m 3 was A5, Emergency Operations Facility (EOF).

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 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 silver zeolite cartridges collected from all five locations ex-hibited 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 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE 3 Nuclear Fallout in the Calvert Cliffs Area SURFACE AIR VAPORS, LUSBY, MD (A4) 250 200 ATMOSPHERIC FALLOUT oe)

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January 1 - December 31, 2006 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, Ib8, and Ib9). 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 DR1O), 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 DR15), Appeal School (sample code DR16), Cove Point and Little Cove Point Roads (sample code DR17), Cove Point (sample code DR18), Long Beach (sample code DR19), and On Site Near Shore (sample code DR20). The three control locations are the Emergency Operations Facility (sample code DR21), Solomons Island (sample code DR22), and Taylors Island, Carpenters Property (sample code DR23).

The mean 90 day ambient radiation measured at the indicator locations was 11.36 mR and ranged from 9.29 to 15.00 mR as reported in Table 2. The control locations showed a 90 day mean of 12.62 mR with ranges from 10.17 to 15.46 mR. The location with the highest overall mean of 15.00 was DR23, Taylors Island, which ranged from 14.41 to 15.46 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.

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January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Il.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 4.90 x 10-2 mrem to a child via the plume, ground, vegetable, meat, and inhalation pathways at 2.1 km SE of the containments at Calvert Cliffs. This is less than 0.1% of the acceptable limit of 75 mrem/yr as specified in 40CFR190, "Environmental Radiation Protection Standards for Nu-clear Power Operations."

A maximum whole body gamma dose of 2.2 x 10-3 mrem to a child at 2.4 km SSW of the containments at Calvert Cliffs. This is less than 0.01% 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 1.00 x 10-2 mrem to a child 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 2.6 x 10-3 mrem to an adult for all liquid pathways, which is about 0.00 1% of the acceptable dose limit of 75 mrem/yr as specified in 40CFR190.

A maximum whole body dose of 1.61 x 10-3 mrem to a child 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 bone, of 4.57 x 10-3 mR to a child for all pathways, which is 0.02% of the acceptable dose limit of 25 mrem/yr specified in 40CFR190.

12

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Gaseous and Liquid Pathways Combined A maximum thyroid dose of 5.16 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; A maximum whole body dose of 3.81 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 40CFR190; A maximum calculated dose to all other organs via liquid and gaseous pathways was equal to allowable 1.00 limit of x2510-2 mrem to mrem/yr as the skin. This specified dose was less than 0.05% of the 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 1 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 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 14

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations SITUE C AILUERT CLIFFS 04/13/8?B0s1B TITLEU TIHE INTEGRATED ELEUArTED AUERAGE t X/Q

!ERIODD,64:3.55 HOUR INttEGRrION;RELERE IPnieLr IE..88 HL-5 MIODEL: TIME INTEGRATED STRA[GHT LINE

________________________________________________ START DOSE INTEGRATION- 01/01/G 01 .00 END DOSE INTEGRAT'ION! 12/31/OG 24080 COENTOUR LEGEND KSEC/M3) 1 4-1E-87t 2.@E- 7-4.BE-07 3- 1.@E-I7-2.SE-07 4- ?.IE-IS9-1 .0E- 7 4.IE--- 7.*OE-1.E-I6-2.OE-15

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 16

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition SITE- CI ALUERT CLIFFS 0411310 3*.9:1 TITLE: TIf IE INTEGRATED DEPOSIrIoN Dig PERIOD:S643 UuqQr Z.IM MODEL: TIME INTEGRATED STRAIGHT LINE

_STRT DOSE INTEGRATIQN: 101/811G 8 1t88 END DOSE INTEGRAl 1iN. I2/31/BS 24!00 1!OT:NUI LEGEND 4.I:E -049*

2.@E- g- -11E-09

?.IE-Ig-1.BE-09 4-

4. ZE--- 7 O E-10 5p 2.UE-1I-4.SE-10 1.IE-18-2.OE-10

?.:IE-11 -1 OSE-10 4.UE-11 -7.SE-11 2.IE 4.OE-11 17

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 18

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table 1 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Collected Analysis Analysis Number Analyzed Frequency Locations Frequency1 Aquatic Environment Bay Water MC 2 24 Gamma M 24 H-3 QC 8 Fish2 A 4 4 Gamma A 4 Oysters Q 2 8 Gamma Q 8 Shoreline SA 1 2 Gamma SA 2 Sediment Atmospheric Environment 3

Air lodine W 5 257 1-131 W 257 Air 4 W 5 258 Gross Beta W 258 Particulates Gamma MC 60 Direct Radiation Ambient Q 23 537 TLD Q 537 Radiation Terrestrial Environment Vegetations M 3 30 Gamma M 30 W-weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 Once in Season, July through September 3 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 19

January 1 - December 31, 2006 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 Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations Pathway Sampled Number of Detection (LLD) Locations Mean Highest Annual Mean (F) / Range 1 Mean (F)/Range (Unit of Analyses (F)/Range 1 Mean Measurement) Performed Name/Distance 2 &

Direction Atmospheric Environment Air Gross Beta (258) 0.5 1.7 (206/206) EOF A5 2.1 (52/52) 2.1 (52/52)

Particulates (0.8-4.4) 19.3 km WNW (1.0-4.0) (1.0-4.0)

(10-2 pCi/m 3)

Direct Radiation Ambient TLD (537) -- 11.36 (471/471) Taylors Island 15.00 (24/24) 12.62 (66/66)

Radiation (9.29-15.00) DR23 (14.41-15.46) (10.17-15.46)

(mRJ90 days) 12.6 km ENE

' Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses 2From the centerpoint between the two containment buildings.

20

January 1 - December 31, 2006 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. 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 to satisfy our commitment to the surrounding community.

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 Obieectives 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, 21

January 1 - December 31, 2006 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 con-centration 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. 7).

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 22

January I - December 31, 2006 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 4.5 x 10-2 pCi/m 3 for the'indicator locations and 0.7 x 10-2 to 3.3 x 10-2 pCi/m 3 for the control location. The location with the highest overall mean of:

2.3 x 10-2 pCi/m 3 was SFA4, SSE of ISFSI.

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 Veaetation 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),

NNWof 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 SFS1),-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 thirteen quarterly samples from both indicator and control locations. The Cs-137 concentrations ranged from 37 + 45 to 922 +/- 127 pCi/kg. While the presence of Cs-137in 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.

'23

January 1 - December 31, 2006 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 SFDR1O); WNW of ISFSI, (sample code SFDR1 1); WSW of ISFSI, (sample code SFDR12); South of ISFSI, (sample code SFDR1!3); 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 26.79 mR and ranged from 9.53 to 42.06 mR as reported in Table 4. The control location showed a 90 day mean of 12.64 mR and ranged from 12.11 to 13.45 mR. The location with the highest overall mean of 39.40 mR with a range of 37.46 to 42.06 mR was SFDR18, 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.

24

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE 7 Mean TLD Gamma Dose, ISFSI 10

-*- Control Location (SFDR7) 9-

--- ISFSI Mean (DR7 & 30, SFDR1-6, 8-18) 8-7-

U,) 6-CU

-0 0 5-CO E 4-3 2

0 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 25

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table 3 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Collected Analysis Analysis Number Analyzed Frequency Locations Frequency1 Atmospheric Environment Air 2 W 5 258 Gross Beta W 258 Particulates Gamma MC 60 Direct Radiation Ambient Q 20 480 TLD Q 480 Radiation 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 26

January 1 - December 31, 2006 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 Type and Total Lower Limit of Indicator Location with Highest Annual Control Pathway Number of Detection (LLD) Locations Mean Highest Annual Mean (F) / Locations Mean Sampled (Unit of Analyses (F)/Range'. Mean Range1 (F)/Rangel Measurement) Performed Name/Distance

& Direction 2 Atmospheric Environment Air Gross Beta (258) 0.5 1.9 (206/206) SSE of ISFSI 2.3 (52/52) 1.7 (52/52)

Particulates (0.7-4.5) SFA4 (0.9-4.5) (0.7-3.3)

(10-2 pCi/m3) 0.1 km SSE Direct Radiation Ambient TLD (480) 26.79 (456/456) West of ISFSI 39.40 (24/24) 12.64 (24/24)

Radiation (9.53-42.06) SFDR18 (37.46-42.06) (12.11-13.45)

(mR/90 days) 0.1 kmW Terrestrial Environment Soil Gamma (20) 17 345 (10/16) NNW of ISFSI 626 (4/4) 106 (3/4)

(pCi/kg) Cs-137 (37-922) SFS3 (221-922) (65-1-78) 0.1 kmNNW 1

2 Mean and range based upon detectable measurements only. Fraction (F) of detectable measurement at specified locations is indicated in parentheses From the centerpoint of the ISFSI facility 27

January 1 - December 31, 2006 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", NUSNo. 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 MonitoringProgram.

(8) Constellation Energy Laboratory Procedures Manual, General Services Department.

(9) Constellation Energy, "Land Use Survey Around Calvert Cliffs Nuclear Power Plant, August 2006."

(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 28

January 1 - December 31, 2006 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.

29

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 30

January 1 - December 31, 2006 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..33 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert C liffs ................................................................................................ 41 Figure Title Page A-i Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs N uclear Power Plant ............................................................................................................. 35 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles .................................. 37 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ................................ 39 A-4 Independent Spent Fuel Storage Installation Sampling Locations ..................................... 42 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ........ 43 31

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 32

January 1 - December 31, 2006 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)

Al On Site before Entrance to Camp Conoy 0.7 0.4 S A2 Camp Conoy at Emergency Siren 2.5 1.6 SSE A3 Bay Breeze Road 2.6 1.6 SE A4 Route 765 Lusby 2.9 1.8 SSW A5 Emergency Operations Facility (EOF) 19.3 12.0 WNW DRI On Site along Cliffs 0.6 0.4 NW DR2 Route 765, Auto Dump 2.7 1.7 WNW DR3 Route 765,Giovanni's Tavern (Knotty Pine) 2.3 1.4 W DR4 Route 765, across from White Sands Drive 2.0 1.2 WSW DR5 Route 765, John's Creek 2.4 1.5 SW DR6 Route 765 Lusby 2.9 1.8 SSW DR72 On Site before Entrance to Camp Conoy 0.7 0.4 S DR8 Camp Conoy at Emergency Siren 2.5 1.6 SSE DR9 Bay Breeze Road 2.6 1.6 SE DR1O Calvert Beach Rd. and Decatur Street 6.4 4.0 NW DR 1I Dirt road off Mackall & Parran Roads 6.6 4.1 WNW DR12 Mackall and Bowen Roads 6.7 4.2 W DR13 Mackall Rd. near Wallville 6.1 3.8 WSW DR14 Rodney Point 6.4 4.0 SW DR15 Mill Bridge and Turner Roads 6.2 3.9 SSW DR16 Across from Appeal School 6.5 4.0 S DR17 Cove Point and Little Cove Point Roads 5.9 3.7 SSE DRI 8 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, Carpenter's Property 12.6 7.8 ENE Ial,2 Discharge Area 0.3 0.2 N Ia3 Camp Conoy 0.9 0.6 E Ia4,5 Patuxent River N/A N/A N/A Ia6 Kenwood Beach 10.7 6.6 NNW Ial0 Hog Island 15.3 9.5 SSE Lbl,2,3 Garden Off Bay Breeze Road 2.6 1.6 SSE Ib4,5,6 On Site before Entrance to Camp Conoy 0.7 0.4 S Ib7,8,9 Emergency Operations Facility (EOF) 19.3 12.0 WNW Wal Intake Area 0.2 0.1 NNE Wa2 Discharge Area 0.3 0.2 N Wbl 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 33

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 34

January 1 - December 31, 2006 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 35

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 36

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-2 Miles 37

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 38

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-10 Miles 39

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 40

January 1 - December 31, 2006 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 Distance' Direction' Station Description (KM) (Sector)

Air Particulate A1 2 On Site before Entrance to Camp Conoy 0.3 ESE SFA1 Meteorological Station 0.3 NW SFA2 CCNPP Visitor's Center 0.8 N SFA3 NNW of ISFSI 0.1 NNW SFA4 SSE ofISFSI 0.1 SSE Direct Radiation SFDR1 SW of ISFSI 0.2 SW SFDR2 NNW of ISFSI 0.2 NNW SFDR3 North of ISFSI 0.1 N SFDR4 NE of ISFSI 0.1 NE SFDR5 East of ISFSI 0.1 E SFDR6 ESE of ISFSI 0.1 ESE.

SFDR7 CCNPP Visitor's Center 0.8 N SFDR8 NNW of ISFSI 0.1 NNW SFDR9 SSE of ISFSI 0.1 SSE SFDR1O NW of ISFSI 0.1 NW SFDR11 WNW of ISFSI 0.1 WNW SFDR12 WSW of ISFSI 0.04 WSW SFDR13 South ofISFSI 0.1 S SFDR14 SE of ISFSI 0.1 SE SFDR15 ENE of ISFSI 0.1 ENE SFDR16 SSW of ISFSI 0.04 SSW SFDRI7 NNE ofISFSI 0.1. NNE SFDR18 West of ISFSI 0.04 W DR72 On Site before Entrance to Camp Conoy 0.3 ESE DR30 Meteorological Station 0.3 NW Vegetation "_*_,

SFbl Meteorological Station 0.3 NW SFb2 CCNPP Visitor's Center 0.8 N SFb3 NNW of ISFSI 0.1 NNW SFb4 SSE of ISFSI 0.1 SSE SFb5 On Site before Entrance to Camp Conoy 0.3 ESE Soil _

SFS1 Meteorological Station 0.3 NW SFS2 CCNPP Visitor's Center 0.8 N SFS3 NNW of ISFSI 0.1 NNW SFS4 SSE of ISFSI 0.1 SSE SFS5 On Site before Entrance to Camp Conoy 0.3 ESE

'Distance and direction from the central point of the ISFSI 2 Common to both REMP and ISFSI monitoring program 41

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE A-4 Independent Spent Fuel Storage Installation Sampling Locations 42

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 FIGURE A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations 43

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 44

January 1 - December 31, 2006 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.

45

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 46

January 1 - December 31, 2006 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 .......................................... 49 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish .......................................... 50 B-3 Concentration of Gamma Emitters in Oyster Samples ...................................................... 51 B-4 Concentration of Gamma Emitters in Shoreline Sediment ................................................. 52 B-5 Concentration of Iodine-131 in Filtered Air ....................................................................... 53 B-6 Concentration of Beta Emitters in Air Particulates ............................................................ 55 B-7 Concentration of Gamma Emitters in Air Particulates ..................................................... 59 B-8a Concentration of Gamma Emitters in Vegetation Samples ................................................ 60 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the IFSFI ..... 61 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 62 B-10 Typical MDA Ranges for Gamma Spectromietry .............................................................. 63 B-1I Typical LLDs for Gamma Spectrometry ........................................................................... 64 B -12 D irect R adiation ....................................................................................................................... 65 47

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 48

January 1 - December 31, 2006 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 +/- 2o')

Sample Code Sample H-31 Gamma Emitters Date Wal 1/31/2006

Intake Vicinity 2/28/2006 3/31/2006 <446 4/28/2006 5/31/2006 6/29/2006 6/30/2006 <456 7/31/2006 8/31/2006 9/29/2006 <340 10/31/2006 11/30/2006

12/28/2006 <340 Wa2 1/31/2006 Discharge Vicinity 2/28/2006

3/31/2006 <457 4/28/2006 5/31/2006 6/29/2006 6/30/2006 <457 7/31/2006 8/31/2006 9/29/2006 <340 10/31/2006

11/30/2006 12/28/2006 <340 1 Quarterly composites of monthly samples

All Non-Natural Gamma Emitters <MDA 49

January 1 - December 31, 2006 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) +/- 2c)

SAMPLE CODE Sample Sample Type Gamme Emitters Date lal 8/22/2006 Bluefish Discharge Area la2 8/22/2006 Spanish Mackeral '

Discharge Area la4 1 8/22/2006 Bluefish Patuxent River la5 1 8/22/2006 Spanish Mackeral Patuxent River Control Location All Non-Natural Gamma Emitters <MDA i

50

January 1 - December 31, 2006 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 Gamma Emitters Date la3 3/24/2006

Camp Conoy 6/19/2006

8/22/2006

10/26/2006

la6 1 3/24/2006

Kenwood Beach 6/19/2006

8/22/2006

10/26/2006

1 Control Location All Non-Natural Gamma Emitters <MDA 51

January 1 - December 31, 2006 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) +/- 2a)

SAMPLE CODE Sample Gamma Emitters Date Wbl 6/26/2006

Shoreline at Barge Rd. 11/20/2006 *

All Non-Natural Gamma Emitters <MDA 52

January 1 - December 31, 2006 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/M3 +/- 2a)

Start Date Stop Date Al A2- A3 A4 A5 1 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd Lusby 1/2/2006 1/9/2006 1/9/2006 1/16/2006 1/16/2006 1/23/2006 1/23/2006 1/30/2006 * *

1/30/2006 2/6/2006 2/6/2006 2/13/2006 2/13/2006 2/20/2006 2/20/2006 2/27/2006 2/27/2006 3/6/2006 3/6/2006 3/13/2006 3/13/2006 3/20/2006

3/20/2006 3/27/2006

3/27/2006 4/3/2006 *

4/3/2006 4/10/2006 4/10/2006 4/17/2006 *

4/17/2006 4/24/2006 4/24/2006 5/1/2006

t 5/1/2006 5/8/2006 5/8/2006 5/15/2006 "*

5/15/2006 5/22/2006 5/22/2006 5/29/2006

A 5/29/2006 6/5/2006 6/5/2006, 6/12/2006 "*

6/12/2006 6/19/2006 6/19/2006 6/26/2006 6/26/2006 7/3/2006 7/3/2006 7/10/2006 7/10/2006 7/17/2006 7/17/2006 7/24/2006 7/24/2006 7/31/2006 7/31/2006 8/7/2006 8/7/2006 8/14/2006 8/14/2006 8/21/2006 8/21/2006 8/28/2006 1Control Location 2 Sampler Malfunction; Loss of Data 3 Operator Error; Loss of Data

" All Non-Natural Gamma Emitters <MDA 53

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m 3 +/- 2cr)

Start Date Stop Date Al A2 A3 A4 A5 1 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd Lusby 8/28/2006 9/4/2006 * *

A 9/4/2006 9/11/2006 *

9/11/2006 9/18/2006 9/18/2006 9/25/2006

9/25/2006 10/2/2006

10/2/2006 10/9/2006 *

10/9/2006 10/16/2006 *t 10/16/2006 10/23/2006 "k 10/23/2006 10/30/2006 10/30/2006 11/6/2006 11/6/2006 11/13/2006 11/13/2006 11/20/2006 11/20/2006 11/27/2006 * *

11/27/2006 12/4/2006 *

12/5/2006 12/11/2006

12/12/2006 12/18/2006 * *

12/18/2006 12/25/2006

12/25/2006 1/1/2007 1 Control Location 54

January 1 - December 31, 2006 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/m 3 +/- 2cr)

Start Date Stop Date Al A2 A3, A4 A5 1 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd, Lusby 1/2/2006 1/9/2006 1.7 +/- 0.2 1.5 +/- 0.2 1.1 +/-0.2 1.7 +/- 0.2 1.5 +/- 0.2 1/9/2006 1/16/2006 1.9+/-0.3 1.4 +/- 0.2 1.4 +/- 0.2 2.0 +/-.0.3 1.6 +/- 0.2 1/16/2006 1/23/2006 1.3 +/- 0.2 1.3 +/-0.2 1.1 +/-0.2 1.8 +/- 0.3 1.2 +/- 0.2 1/23/2006 1/30/2006 1.7 +/- 0.2 1.3 +/- 0.2 1.3 +/- 0.2 1.5 +/- 0.2 1.7 +/- 0.2 1/30/2006 2/6/2006 1.5 +/- 0.2 1.2 +/- 0.2 1.3 +/- 0.2 2.1 +/-0.3 1.2 +/- 0.2 2/6/2006 2/13/2006 1.9 +/- 0.3 1.6 +/- 0.2 1.6 +/- 0.2 1.8 +/- 0.3 1.8 +/- 0.2 2/13/2006 2/20/2006 3.0 +/- 0.3. 2.4 +/- 0.2 2.0+/-0.2 0.9 +/- 0.2 2.6+/-0.2 2/20/2006 2/27/2006 3.1 +/-0.3 2.2 +/- 0.2 2.2+/-0.2 2.8 +/- 0.3 2.6 +/- 0.2 2/27/2006 3/6/2006 2.3 +A 0.3 1.9 +/- 0.2 1.5 +/- 0.2 2.3 +/- 0.3 2.3+/-0.3 3/6/2006 3/13/2006 2.8 +/- 0.3 1.8 +/- 0.2 1.7 +/- 0.2 2.5+/- 0 3 2.4+/-0.2 3/13/2006 3/20/2006 3.0 +/- 0.3 2.0 +/- 0.2 2.2 +/- 0.2 2.5 +/- 0.2 2.4 +/- 0.2 3/20/2006 3/27/2006 1.4 +/- 0.3 1.4 +/- 0.2 1.1 +/-0.2 1.2 +/-0.2 1.2 +/- 0.2 3/27/2006 4/3/2006 2.3 +/- 0.2 2.1 +/-0.2 1.9 +/-0.2 2.3 +/- 0.2 2.0 +/- 0.2 4/3/2006 4/10/2006, 1.9 +/- 0.3 1.8 +/- 0.2 1.4 +/- 0.2 1.5 +/- 0.2 1.9 +/- 0.2 4/10/2006 4/17/2006 2.1 +/-0.3 1.4 +/- 0.2 1.5 +/- 0.2 1.5 +/- 0.2 1.9 +/- 0.2 4/17/2006 4/24/2006 1.1 +/-0.2 1.2 +/- 0.2 0.9 +/- 0.2 1.0 +/- 0.2 1.2 +/- 0.2 4/24/2006 5/1/2006 1.5 +/- 0.2 1.6 +/- 0.2 2 1.3 +/- 0.2 1.9 +/- 0.3 2

5/1/2006 5/8/2006 1.5 +/- 0.2 1.4 +/- 0.2 1.3 +/- 0.2 1.5 +/- 0.2 5/8/2006 5/15/2006 1.2 +/- 0.2 0.9 +/- 0.2 1.0 +/- 0.2 1.0 +/- 0.2 1.1 +/-0.2 5/15/2006 5/22/2006 1.0 +/- 0.2 1.2 +/-0.2 1.1 +/-0.2 1.0 +/- 0.2 1.4 +/- 0.2 5/22/2006 5/29/2006 1.6 +/- 0.2 1.5 +/- 0.2 1.4 +/- 0.2 1.3 +/- 0.2 1.8 +/- 0.2 5/29/2006 6/5/2006 1.5 +/- 0.2 1.8 +/-0.2 1.9 +/- 0.3 1.4 +/- 0.2 2.0 +/- 0.2 6/5/2006 6/12/2006 1.1 +/-0.2 1.0 +/-0.2 1.1 +/-0.2 1.0 +/- 0.2 1.5 +/- 0.2 6/12/2006 6/19/2006 1.4 +/-0.2 1.4 +/-0.2 1.1 +/-0.2 1.6 +/-0.2 2.2 +A 0.2 6/19/2006 6/26/2006 1.1 +/-0.2 0.8 +/- 0.2 0.8 +/- 0.2 1.2 +/-0.2 1.1 +/-0.2 6/26/2006 7/3/2006 1.3 +/- 0.2 1.1 +/-0.2 1.6 +/- 0.2 1.5 +/-0.2 2.5+/-0.3 7/3/2006 7/10/2006 1.8 +/- 0.2 1.4 +/- 0.2 1.5 +/- 0.2 1.6 +/-0.2 2.6 +/- 0.3 7/10/2006 7/17/2006 1.6 +/- 0.2 1.2 +/- 0.2 1.0 +/- 0.2 1.7 +/- 0.2 2.0 +/- 0.3 7/17/2006 7/24/2006 1.3 +/- 0.2 1.3 +/- 0.2 2.3 +/- 0.2 0.9 +/- 0.2 2.1 +/-0.3 7/24/2006 7/31/2006 2.1 +/-0.2 1.9 +/- 0.2 1.8 +/- 0.2 2.2 +/- 0.2 3.0 +/- 0.3 7/31/2006 8/7/2006 1.8 +/- 0.2 2.4 +/- 0.3 2.6+/-0.3 2.1 +/-0.2 2.7 +/- 0.3 8/7/2006 8/14/2006 1.7 +/- 0.2 1.8 +/- 0.2 1.7 +/- 0.2 1.9 +/- 0.2 2.5 +/- 0.3 8/14/2006 8/21/2006 1.9 +/- 0.2 2.0 +/- 0.2 1.8 +/- 0.2 2.0 +/- 0.2 3.1 +/-0.3 8/21/2006 8/28/2006 2.3 +/- 0.2 2.8 +/- 0.2 2.6+/-0.3 2.9 +/- 0.2 4.0 +/- 0.3

' Control Location 2 Sampler Malfunction; Loss of Data 55

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m 3 +/- 2cr)

Start Date Stop Date Al A2 A3 A4 A5 1 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd Lusby 8/28/2006 9/4/2006 1.3 +/- 0.2 1.0 +/- 0.2 1.0 +/- 0.2 0.9 +/- 0.2 1.1 +/-0.2 9/4/2006 9/11/2006 2.2+/-0.2 1.9 +/- 0.2 2.0+/-0.2 2.0+/-0.2 2.8 +/- 0.3 9/11/2006 9/18/2006 1.2 +/- 0.2 1.0 +/- 0.2 1.0 +/- 0.2 0.9 +/- 0.2 1.0 +/- 0.2 9/18/2006 9/25/2006 1.5 +/- 0.2 1.4 +/- 0.2 1.6 +/- 0.2 1.5 +/- 0.2 2.5+/-0.3 9/25/2006 10/2/2006 1.7 +/- 0.2 1.5 +/- 0.2 1.9 +/- 0.3 1.6 +/-0.2 2.3 +/- 0.3 10/2/2006 10/9/2006 1.6 +/- 0.2 1.8 +/-0.2 1.6 +/- 0.3 1.5 +/- 012 2.1 +/-0.3 10/9/2006 10/16/2006 2.2 +/- 0.2 2.3+/-0.2 3.0 +/- 0.3 2.5 +/- 0.2 3.1 +/-0.3 10/16/2006 10/23/2006 1.3 +/- 0.2 1.7 +/- 0.2 1.8 +/- 0.3 1.2 +/- 0.2 2.0 +/- 0.3 10/23/2006 10/30/2006 1.3 +/- 0.2 1.7 +/- 0.2 2.5 +/- 0.3 1.5 +/- 0.2 1.7 +/- 0.2 10/30/2006 11/6/2006 2.3+/-0.2 3.0 +/- 0.3, 3.9 +/- 0.4 2.5 +/- 0.2 3.9 +/- 0.4 11/6/2006 11/13/2006 1.5 +/-0.2 1.8 +/-0.2 1.2 +/- 0.2 1.5 +/- 0.2 1.2+/- 0.1 11/13/2006 11/20/2006 1.4 +/- 0.2 1.6 +/-0.2 1.5 +/- 0.2 1.6 +/- 0.2 1.2 +/- 0.2 11/20/2006 11/27/2006 1.7 +/- 0.2 1.6 +/-0.2 1.5 +/- 0.2 1.8 +/- 0.2 1.5 +/- 0.2 11/27/2006 12/4/2006 1.4 +/- 0.2 1.9 +/-0.2 1.8 +/- 0.2 2.0 +/- 0.2 1.9 +/- 0.2 12/4/2006 12/11/2006 2.8 +/- 0.2 2.9 +/- 0.2 2.8 +/- 0.2 2.8+/-0.2 2.5 +/- 0.2 12/12/2006 12/18/2006 3.4+/-0.2 3.9+/-0.2 4.4 +/- 0.3 3.5 +/-0.2 3.8+/-0.2 12/18/2006 12/25/2006 1.6 +/- 0.2 1.9 +/- 0.2 1.8 +/- 0.2 2.4 +/- 0.2 1.8 +/- 0.2 12/25/2006 1/1/2007 1.9 +/- 0.2 2.0 +/- 0.2 1.7 +/- 0.2 2.0 +/-0.2 1.9 +/- 0.2 1 Control Location 56

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 102 pCi/M3 +/- 2c)

Start Date Stop Date SFA1 SFA2 1 SFA3 SFA4 MET Station Visitors Center NNW of ISFSI SSE of ISFSI 2

1/2/2006 1/9/2006 1.6 +/-0.3 1.4 +/- 0.2 1.5 +/- 0.2 1/9/2006 1/16/2006 1.6 +/- 0.2 1.7 +/- 0.2 1.3 +/- 0.2 2.2 +/- 0.2 2

1/16/2006 1/23/2006 1.2 +/- 0.2 1.3 +/- 0.2 1.5 +/- 0.2 1/23/2006 1/30/2006 1.7 +/- 0.2 1.5 +/- 0.2 1.7 +/- 0.3 1.9 +/- 0.2 1/30/2006 2/6/2006 1.3 +/- 0.2 1.4 +/- 0.2 1.1 +/-0.2 1.9 +/- 0.2 2/6/2006 2/13/2006 1.7 +/- 0.2 1.5 +/- 0.2 1.6 +/- 0.2 1.4 +/- 0.2 2/13/2006 2/20/2006 1.5 +/-0.2 2.3+/-0.2 2.4 +/- 0.2 3.0+/-0.3 2/20/2006 2/27/2006 2.6+/-0.3 2.3 +/- 0.2 2.2+/-0.2 2.9 +/-,0.3 2/27/2006 3/6/2006 2.1 +/-0.2 2.0 +/- 0.2 1.9 +/-0.2 3.0 +/- 0.3 3/6/2006 3/13/2006 2.3+/-0.2 2.0+/-0.2 1.9 +/-0.2 2.7+/-0.3 3/13/2006 3/20/2006 2.7 +/- 0.3 2.1 +/-0.2 2.3 +/- 0.2 3.2 +/- 0.3 3/20/2006 3/27/2006 0.9 +/- 0.2 1.3 +/- 0.2 1.1 +/-0.2 0.9+/-0.2 3/27/2006 4/3/2006 2.6+/-0.3 1.8 +/- 0.2 2.0 +/- 0.2 2.5 +/- 0.2 4/3/2006 4/10/2006 1.9 +/-0.2 1.4 +/- 0.2 1.5 +/- 0.2 2.1 +/-0.3 4/10/2006 4/17/2006 1.6 +/- 0.2 1.3 +/- 0.2 1.3 +/- 0.2 1.8 +/- 0.2 4/17/2006 4/24/2006 1.2 +/- 0.2 1.1 +/-0.2 1.0 +/- 0.2 1.2 +/- 0.2 4/24/2006 5/1/2006 1.5 +/- 0.2 1.4 +/- 0.2 1.5 +/-0.2 1.8 +/- 0.2 5/1/2006 5/8/2006 1.5 +/- 0.2 1.3+/- 0.2 1.6 +/- 0.2 1.8 +/- 0.2 5/8/2006 5/15/2006 0.9+/-0.2 0.8+/-0.2 0.7 +/- 0.1 1.7 +/- 0.2 5/15/2006 5/22/2006 1.2 +/- 0.2 1.1 +/-0.2 1.0 +/- 0.2 2.1 +/-0.3 5/22/2006 5/29/2006 1.6 +/- 0.2 1.5 +/- 0.2 1.3 +/- 0.2 2.2 +/-0.3 5/29/2006 6/5/2006 1.8 +/- 0.2 1.7 +/- 0.2 1.2 +/- 0.2 2.1 +/-0.3 6/5/2006 6/12/2006 1.0 +/- 0.2 1.1 +/-0.2 1.1 +/-0.2 2.1 +/- 0.3 6/12/2006 6/19/2006 1.6 +/-0.2 1.7 +/- 0.2 1.2 +/- 0.2 2.3 +/- 0.3 6/19/2006 6/26/2006 1.2 +/- 0.2 0.9+/-0.2 0.8 +/- 0.2 1.9 +/- 0.3 6/26/2006 7/3/2006 1.6 +/- 0.2 1.5 +/- 0.2 1.7 +/- 0.2 2.2 +/- 0.3 7/3/2006 7/10/2006 1.7 +/- 0.2 1.6 +/- 0.2 1.6 +/- 0.2 2.2+/-0.3 7/10/2006 7/17/2006 1.6 ÷1- 0.2 1.7 +/- 0.2 1.9 +/-0.2 2.3+/-0.3 7/17/2006 7/24/2006 1.6 +/- 0.2 1.5 +/-0.2 1.7 +/-0.2 1.8 +/-0.3 7/24/2006 7/31/2006 2.3 +/- 0.2 2.4 +/- 0.2 2.4 +/- 0.2 3.1 +/-0.3 7/31/2006 8/7/2006 1.6 +/-0.2 2.4 +/- 0.2 2.3 +/- 0.2 3.1 +/-0.3 8/7/2006 8/14/2006 1.7 +/- 0.2 2.0+/-0.2 2.0 +/- 0.2 2.8 +/- 0.3 8/14/2006 8/21/2006 1.9 +/- 0.2 1.9 +/- 0.2 2.2 +/- 0.2 3.1 +/-0.3 8/21/2006 8/28/2006 2.6 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.2 4.3+/-0.3 1Control Location 2 Sampler Malfunction; Loss of Data 57

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m 3 +/- 2cr)

Start Date Stop Date SFA1 SFA2 1 SFA3 SFA4 MET Station Visitors Center NNW of ISFSI SSE of ISFSI 8/28/2006 9/4/2006 1.0 +/-0.2 0.7 +/-.0.2 0.8 +/- 0.2 1.1 +/-0.2 9/4/2006 9/11/2006 2.2 +/- 0.2 2.3 +/- 0.2 2.1 +/- 0.2 3.6 +/- 0.4 9/11/2006 9/18/2006 0.9 +/- 0.2 1.0 +/- 0.2 0.9 +/- 0.2 1.7 +/- 0.3 9/18/2006 9/25/2006 1.5 +/- 0.2 1.6 +/- 0.2 1.9 +/- 0.2 2.4 +/- 0.3 9/25/2006 10/2/2006 1.4 +/- 0.2 1.5 +/- 0.2 1.6 +/- 0.2 2.3+/-0.3 10/2/2006 10/9/2006 1.7 +/-0.2 1.3 +/- 0.2 1.3 +/- 0.2 2.5+/-0.3 10/9/2006 10/16/2006 2.2 +/- 0.2 2.4+/-0.2 2.1 +/- 0.2 3.9 +/- 0.4 10/16/2006 10/23/2006 1.1 +/-0.2 1.3 +/- 0.2 1.2 +/-0.2 2.3+/-0.3 10/23/2006 10/30/2006 1.3 +/- 0.2 1.2 +/- 0.2 1.6 +/-0.2 1.5 +/-0.2 10/30/2006 11/6/2006 2.6 +/- 0.2 2.8 +/- 0.2 2.2 +/- 0.2 4.5+/-0.4 11/6/2006 11/13/2006 1.2 +/- 0.2 1.1 +/-0.2 1.2 +/-0.1 1.4 +/-0.2 11/13/2006 11/20/2006 1.7 +/- 0.2 1.5 +/-0.2 1.4 +/- 0.2 1.7 +/- 0.2 11/20/2006 11/27/2006 1.5 +/- 0.2 1.6 +/- 0.2 1.4 +/-0.2 1.9 +/- 0.2 11/27/2006 12/4/2006 2.0 +/- 0.2 2.1 +/-0.2 1.8 +/- 0.2 2.2 +/- 0.2 12/4/2006 12/11/2006 2.4 +/- 0.2 2.7+/-0.2 2.4 +/- 0.2 3.1 +/-0.2 12/12/2006 12/18/2006 3.4 +/- 0.2 3.3 +/- 0.2 3.1 +/-0.2 3.6 +/- 0.2 12/18/2006 12/25/2006 1.6 +/- 0.2 1.4 +/-0.2 1.6 +/- 0.2 2.0 +/- 0.2 12/25/2006 1/1/2007 2.0 +/- 0.2 2.1 +/-0.2 1.8 +/- 0.2 2.2 +/- 0.2 1Control Location 58

January 1 - December 31, 2006 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 Al A2 A3 A4 A5 1 Date Entrance to Camp Conoy Bay Breeze Rd Route 765 at EOF Camp, Conoy Siren Lusby 1/15/2006 *

2/15/2006 3/15/2006 *k 4/15/2006 *t 5/15/2006 6/15/2006 *k 7/15/2006 8/15/2006 9/15/2006 "*

10/15/2006 11/15/2006 12/15/2006 Sample SFA1 SFA2 1 SFA3 SFA4 Date MET Station Visitors Center NNW of ISFSI SSE of ISFSI 1/15/2006 ...

2/15/2006 ...

3/15/2006 ....

4/15/2006 .....

5/15/2006 .....

6/15/2006 ....

7/15/2006 * * *

8/15/2006 ...

9/15/2006 ....

10/15/2006 .....

11/15/2006 ....

12/15/2006 ....

1 Control Location All Non-Natural Gamma Emitters <MDA 59

. January 1 - December 31, 2006 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 Sample Type Gamma Emitters Date Ibl" 6/26/2006 Cabbage

k Bay Breeze Rd 7/24/2006 Collards 10/2/2006 Broccoli Ib2 6/26/2006 Collards Bay Breeze Rd 7/24/2006 Cauliflower *t 10/2/2006 Cabbage

k Ib3 6/26/2006 Broccoli *t Bay Breeze Rd 7/24/2006 Brussels sprouts 10/2/2006 Collards Ib4 6/26/2006 Cabbage Camp Conoy Entrance 7/24/2006 Collards

t 8/28/2006 Collards 10/2/2006 Broccoli Ib5 6/26/2006 Collards

r Camp Conoy Entrance 7/24/2006 Cauliflower 8/28/2006 Cabbage

t 10/2/2006 Cabbage Ib6 6/26/2006 Broccoli Camp Conoy Entrance 7/24/2006 Brussels sprouts 8/28/2006 Broccoli

k 10/2/2006 Collards Ib7 1 6/26/2006 Cabbage EOF 7/24/2006 Collards 10/2/2006 Broccoli

r Ib8 1 6/26/2006 Collards EOF 7/24/2006 Cauliflower 10/2/2006 Cabbage Ib9 ' 6/26/2006 Broccoli EOF 7/24/2006 Brussels sprouts 10/2/2006 ýCollards 1 Control Location All Non-Natural Gamma Emitters <MDA 60

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the IFSFI (Results in units of pCi/kg (wet) +/- 2a)

SAMPLE CODE Sample Gamma Emitters Date SFbl 3/6/2006 MET Station 6/19/2006 10/6/2006 11/20/2006 SFb2 1 3/6/2006 Visitors Center 6/19/2006 10/6/2006 11/20/2006 SFb3 3/6/2006 NNW of ISFSI 6/19/2006 10/6/2006 11/20/2006 SFb4 3/6/2006 SSE of ISFSI 6/19/2006 10/6/2006 11/20/2006 SFb5 3/6/2006 On Site before Entrance to Camp 6/19/2006 Conoy 10/6/2006 11/20/2006 1 Control Location All Non-Natural Gamma Emitters <MDA 61

January 1 - December 31, 2006 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) +/- 2o SAMPLE CODE Sample Cs-1 37 Gamma Emitters Date 1

SFS1 3/6/2006 1

t MET station 6/19/2006 1 9/25/2006 1

L 11/20/2006 SFS2 2 3/6/2006 6/19/2006 73 +/- 54 Visitors Center 9/25/2006 65 +/- 59 11/20/2006 178 +/ SFS3 3/6/2006 922 +/- 127 *t NNW of ISFSI 6/19/2006 473 +/- 113

t 9/25/2006 221 +/- 74

L 11/20/2006 888 +/- 133 SFS4 3/6/2006 37 +/- 45 SSE of ISFSI 6/19/2006 87 +/- 70 *t 9/25/2006 11/20/2006 SFS5 3/6/2006 331 +/-63 Entrance to Camp 6/19/2006 198 +/- 55 Conoy 9/25/2006 142 +/-41 11/20/2006 157 +/- 47 1This isotope <MDA 2 Control Location

. All Non-Natural Gamma Emitters <MDA 62

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE B-10 Typical MDA Ranges for Gamma Spectrometry Selected Fish Shellfish Shoreline Vegetation Soil Particulates Selected Bay Water Fish Shellfish Shoreline Vegetation Soil Particulates Nuclides pCi/I pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg 10- 3 pCi/m 3 Na-22 1.6-3.8 21-29 18 - 30 28 -29 16 - 37 33 - 95 1.3-3.4 Cr-51 12-40 160- 166 118 - 176 208-213 14- 164 203 - 486 13 -39 Mn-54 1.4-3.2 16-20 15-22 26 - 30 13-28 32-81 1.2-6.2 Co-58 1.5 -4.0 20-23 16-26 28 - 32 13-26 28 -79 1.4-3.4 Fe-59 3.5-11 53 - 74 36 -65 60 - 77 28-69 65-174 3.7-8.2 Co-60 1.5-3.7 18-25 18 -26 27 - 39 15- 35 23-97 1.3-3.3 Zn-65 3.3-7.9 46 -62 36 - 57 69- 97 32 - 73 67 - 238 3.0-6.9 Nb-95 1.7-5.8 25-31 20 - 35 34 -40 13 -27 34 - 93 2.1 -5.0 Zr-95 2.8-6.9 35-44 29-43 45 -62 21 -48 53 - 141 2.1 -6.4 Ru-1 06 12-26 131-149 124- 185 224 - 287 108 - 239 264 - 643 10 - 25 Ag-11im 1.2-2.9 15-18 15-18 21-31 11 -25 29 - 88 0.1 -2.6 Te-129m 18 -60 247-280 192-284 321 -367 135-281 346 - 855 19 -55 1

1-131 2.4-49 99 - 121 30-89 50 - 52 11 -37 32.7-179 Cs-1 34 1.2 -2.6 14-17 13-19 24-34.5 11 -24 27 - 94 1.0-2.4 Cs-1 37 1.2-3.0 15-18 15- 34 25-30 1.5-26 27 -72 1.0-2.8 Ba-1 40 7.3-66 174-208 75-184 138 - 150 41-109 112 -430 12 - 84 La-140 3.2-29 49 -74 75-75 17-51 60-138 8.7-19 Ce-144 7.1 -12 45-49 42-49 101-111 49 - 86 110 - 245 2.8-8.2 1The MDA range for 1-131 on a silver zeolite cartridge is typically 4.16 x 10-' to 3.40 x 10-2 63

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE B-11 Typical LLDs for Gamma Spectrometry Selected Bay Water Fish Shellfish Sediment Particulate Precipitation Vegetation Soil Well Water Nuclides pCi/I pCi/kg pCi/kg pCi/kg 10- 3 pCi/m 3 pCi$I p-Ci/Kg pCi/Kg pCi/I Na-22 2.9 22 22 24 2.9 2.9 35 24 2.9 Cr-51 17 88 88 110 12 17 162 110 17 Mn-54 2.4 17 17 18 2.1 2.4 27 18 2.4 Co-58 .2.4 16 16 17 2.0 2.4 25 17 2.4 Fe-59 5.2 37 37 38 4.6 5.2 60 38 5.2 Co-60 2.8 22 22 21 2.7 2.8 33 21 2.8 Zn-65 5.6 23 23 54 2.8 5.6 66 54 5.6 Nb-95 2.2 15 15 18 1.9 2.2 25 18 2.2 Zr-95 3.8 27 27 29 3.3 3.8 44 29 3.8 Ru-106 20 135 135 146 17 20 223 146 20 Ag-110m 2.1 14 14 16 1.8 2.1 25 16 2.1 Te-129m 26 149 149 180 20 26 265 180 26 1-131 2.0 11 11 14 1.5" 2.0 20 14 2.0 Cs-134 2.2 15 15 20 1.9 2.2 24 20 2.2 Cs-137 2.3 15 15 17 1.8 2.3 27 17 2.3 Ba-140 7.3 48 48 54 6.1 7.3 80 54 7.3 La-140 .4.1 26 26 25 3.4 4.1 41 25 4.1 Ce-144 12 43 43 75 5.5 12 101 75 12 3

The LLD for 1-131 measured on a silver zeolite cartridge is 2.0 xl0 pCi/m3 64

January 1 - December 31, 2006 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 DR01 On Site, along Cliffs 12.51 +/- 1.12 13.51 +/- 2.89 12.90 +/- 0.76 14.73 +/- 4.05 DR02 Route 765, Auto Dump 10.39 +/- 0.86 9.77 +/- 0.37 10.62 +/- 0.38 10.90 +1- 1.31 DR03 Route 765, Giovanni's 10.26 +/- 0.44 10.27 +/- 0.92 10.48 +/- 1.17 10.75 +/- 1.40 Tavern DR04 Route 765, across 12.44+/- 1.19 11.35 +/- 0.96 12.21 +/- 0.83 12.35 +/- 0.59 from White Sands Drive.

Route 765, John's 11.62 +/- 0.55 10.78 +/- 0.67 11.36 +/- 0.72 11.93 +/- 0.57 DR05 Creek DR06 Route 765 at Lusby 10.04 +/- 0.85 9.67 +/- 0.68 10.00+/- 1.12 10.54 +/- 1.42 DR07 Entrance to Camp 10.68 +/- 0.14 9.53 +/- 0.86 10.14 +/- 0.52 10.82 +/- 0.77 Conoy DR08 Camp Conoy Rd at 14.35 +/- 1.09 13.83 +/- 1.72 14.86 +/- 1.54 15.00 +/- 0.46 Emergency Siren DR09 Bay Breeze Rd 11.22 +/- 0.43 10.62 +/- 0.86 11.35 +/- 1.66 11.05 +/- 0.80 DR10 Calvert Beach Rd and 10.46 +/- 0.39 10.15 +/- 0.84 10.51 +/- 1.56 10.50 +/- 0.69 Decatur Street DR1 1 Dirt road off Mackall & 10.47 +/- 0.47 10.51 +/- 0.85 10.65 +/- 0.70 11.49 +/- 0.33 Parren Rd DR12 Mackall & Bowen Rds 10.02 +/- 0.55 10.20 +/- 0.27 10.41 +/- 1.03 11.08+/- 1.12 65

January 1 - December 31, 2006 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 DR1 3 Mackall Rd, near 11.41+/- 1.01 11.43 +/- 1.09 11.55 +/- 1.38 11.94 +/- 1.15 Wallville DR14 Rodney Point 12.81 +/- 1.06 .12.29+/- 1.65 13.18 +/- 0.26 13.62 +/- 1.28 DR15 Mill Bridge & Turner 11.51 +/- 1.11 11.51 +/- 0.90 11.46 +/- 0.80 12.27 +/- 1.16 Rds DR16 Across from Appeal 10.22 +/- 0.81 10.29 +/- 0.49 10.86 +/- 1.14 10.78 +/- 1.14 School Cove Point & Little 12.30 +/- 1.97 12.75 +/- 0.43 12.33 +1- 0.95 DR17 Cove Point Rds DR1 8 Cove Point 9.29 +/- 0.64 9.58 +/- 0.97 9.29 +/- 0.44 9.56 +/- 0.98 DR1 9 Long Beach 10.74 +/- 1.15 10.59 +/- 1.33 10.64 +/- 0.81 11.19 +/- 0.45 DR20 On site, near shore 12.94 +/- 0.89 12.79 +/- 0.89 11.99 +/- 2.23 12.74 +/- 0.74 DR21 1 EOF 11.76 +/- 0.62 11.59 +/- 1.38 11.49 +/- 0.99 11.78 +/- 0.71 DR22 1 Solomons Island 11.02 +1- 0.70 11.00 +/- 0.50

10.17 +/- 0.34 DR23 1 Taylors Island 14.41 +/- 1.21 15.21 +/- 0.54 15.46 +/- 0.90 14.93 +/- 2.79 DR30 MET Station 12.10 +/- 1.02 13.02 +/- 0.85 13.88 +/-0.99 13.19 +/- 1.57 SFDR01 SW of ISFSI 16.44 +/- 1.01 17.23 +/- 1.20 15.84 +/- 1.16 16.22 +/- 2.32

Missing Data Control Location 66

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2o')

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter SFDR02 -NNW of ISFSI 19.68 +1-2.16 19.87 +/- 2.70 21.72 +/- 2.52 21.04 +/- 1.03 SFDR03 North of ISFSI 33.51 +/- 3.89 36.66 +1- 6.39 34.78 +/- 7.47 35.95 +/- 4.63 SFDR04 NE of ISFSI 31.55 +1-5.90 31.43 +/- 3.84 26.37 +/- 3.98 30.76 +/- 4.00 SFDR05 East of ISFSI .17.75+/- 1.33 21.56+/- 0.64 21.37 +/- 1.40 18.91 +/- 2.00 SFDR06 ESE of ISFSI 16.03 +/- 1.19 16.92 +/ 1.14 17.79 +/- 1.26 17.86 +/- 1.60 SFDR071 Visitor's Center 12.11 +/- 0.44 13.45+/- 1.74 12.72 +/- 1.07 12.29 +/- 0.91 SFDR08 NNW of ISFSI 29.45 +/- 3.36 29.68 +/- 3.41 32.58 +/- 1.16 28.43 +/- 1.46 SFDR09 SSE of ISFSI 16.97+/- 1.51 31.84 +Y-1.71 29.95 +/- 3.42 29.70 +/- 3.73 SFDR10 NW of ISFSI 35.74 +/- 4.16 38.50 +/- 12.67 32.65 +/- 7.74 34.33 +/- 6.54 SFDR11 WNW ISFSI 30.39 +/- 4.52 27.81 +/- 2.06 30.78 +/- 7.27 25.40 +/- 2.85 SFDR12 WSW of ISFSI 29.12 +/- 2.22 31.00 +/- 10.41 31.32 +/- 6.86 31.86 +/- 6.23 SFDR13 South of ISFSI 21.88 +/- 4.16 32.59 +/- 7.53 32.25 +/- 3.52 31.28 +/- 2.40 SFDR14 SE of ISFSI 19.62+/- 1.96 36.43 +/- 3.88 32.69 +/- 1.13 30.94 +/- 3.03-SFDR15 ENE of ISFSI 19.52 +/- 3.58 22.89 +/- 3.02 24.37 +/- 3.19 22.03 +/- 2.33 SFDR16 SSW of ISFSI 34.22 +/- 6.89 37.73 +/- 7.39 37.23 +/- 4.32 35.12 +/- 4.32 SFDR17 NNE of ISFSI 35.29 +/- 3.26 39.52 +/- 6.77 37.24 +/- 4.27 37.18+/- 6.40 SFDR18 West of ISFSI 38.44 +/- 8.94 39.65 +/- 8.98 37.46 +/- 6.26 42.06 +/- 6.04

'Control Location 67

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 68

January 1 - December 31, 2006 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 ofthe 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 laboratorys' 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 1 . The uncertainties for the Constellation Energy Laboratory's results and Analytics' results are +/-2a while the ERA laboratory's 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 two soil samples and a shoreline sample involving Cs-137 results. The original analysis of the soil sample from SFS2 collected on 3/06/2006, the split analysis of the soil sample from SFS4 collected on 6/19/2006, and the split analysis of the shoreline sample do not agree within the range of +/-2F of their respective QC comparison soil samples analyze&. These minor discrepancies, which have been observed in previous reporting periods, are most probably due to counting statistics and/or the non-homogeneous nature of this type of sample.. Other samples whose nature generally precludes sample splitting are marked "**" in the SplitAnalysis column.

NRC Inspection Manual, Inspection Procedure 84750, March 15, 1994 2 National Standards for Water Proficiency Testing Studies Criteria Document, December 1998 69

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 70

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page C-1 Results of Participation in Cross Check Programs ............................................................. 73 C-2 Results of Quality Assurance Program ................................................................................ 76 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ........................... 85 71

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 72

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C-1 Results of Participation in Cross Check Programs Sample Sample Type Isotope Reported Cross Check Date and Units Observed Laboratory's Lab Results 1 Results 1 1/16/06 Water-pCi/L Ba-1 33 90+/-8 89+/-10 Co-60 101+/-8 98+/-5 Cs-1 34 19+/-5 22+/-5 Cs-1 37 112+/-11 110+/-6 Zn-65 194+/-24 200+/-19 3/23/06 Milk-pCi/L 1-131 79+/-19 78+/-3 Cs-134 106+/-13 121+/-4 Cs-1 37 92+/-16 89+/-3 Ce-141 108+/-19 104+/-3 Cr-51 280+/-101 280+/-9 Mn-54 93+/-18 93+/-3 Co-58 112+/-20 105+/-3 Fe-59 87+/-23 87+/-3 Co-60 131+/-16 128+/-4 Zn-65 182+/-38 176+/-6 3/23/06 Charcoal 1-131 114+/-8 -86+/-3 Cartridge-pCi 3/23/06 Water-pCi/L Gross 13 225+/-3 262+/-9 4/11/06 Water-pCi/L 1-131 19+/-5 20+/-3 6/8/06 Water-pCi Gross 13 156+/-2 169+/-6 6/8/06 Water-pCi/L 1-131 83+/-26 75+/-2 Cs-1 34 101+/-12 103+/-3 Cs-1 37 114+/-19 95+/-3 Ce-141 166+/-23 149+/-5 Co-58 92+/-19 81+/-3 Fe-59 96+/-26 .76+/ Cr-51 264+/-117 210+/-7 Co-60 116+/-15 104+/-4 Mn-54 141+/-20 119+/-4 Zn-65 155+/-39 150+/-5

' See discussion at the beginning of the Appendix.

73

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Participation in Cross Check Programs Sample Sample Type Isotope Reported Cross Check Date and Units Observed Laboratory's Lab Resultsl Results1 6/8/06 Filter-pCi/filter Ce-141 134+/-7 129+/-4 Cr-51 200+/-35 182+/-6 Cs-1 34 71+/-5 89+/-3 Cs-1 37 82+/-7 82+/-3 Mn-54 105+/-8 130+/-3 Fe-59 70+/-8 66+/-2 Zn-65 143+/-16 130+/-4 Co-60 90+/-6 90+/-3 Co-58 71+/-7 70+/-2 7/10/06 Water-pCi/L Ba-133 80+/-14 85+/-9 Cs-134 46+/-9 52+/-5 Cs-137 243+/-23 239+/-12 Zn-65 113+/-32 128+/-12 Co-60 101+/-13 103+/-5 7/10/06 Water-pCi/L Gross 13 7.46+/-3.00 8.95+/-5.00 9/14/06 Charcoal 1-131 111+/-8 92+/-3 Cartridge-pCi 9/14/06 Filter-pCi/filter Gross 13 80+/-2 85+/-3

' See discussion at the beginning of the Appendix 74

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C-I - Continued Results of Participation in Cross Check Programs Sample Sample Type Isotope Reported: Cross Check Date and Units Observed Laboratory's Lab Results1 Results!

9/18/06 Filter-pCi/filter Am-241 396+/-131 297+/-116 Cs-1 34 2789+/-42 2790+/-390, Cs-137 251+/-18 208+/-66 Co-60 1499+/-28 1220+/-210 10/06/06 Water-pCi/L 1-131 27+/-2, 23+/-3 12/07/06 Milk-pCi/L 1-131 86+/-56 70+/-2 Ce-141 369+/-39 294+/-10 Cr-51 607+/-200 433+/-14 Cs-1 34, 150+/-15 147+/-5 Cs-1 37 264+/-29 237+/-8 Co-58 96+/-18 84+/-3 Mn-54 140+/-23 111+/-4 Fe-59 80+/-29 80+/-3 Zn-65 184+/-39 164+/-5 Co-60 331+/-26 281+/-9 12/07/06 Filter-pCi/filter Ce-141 216+/-9 191+/-6 Cr-51 323+/-50 280+/-9 Cs-1 34 81+/-5 95+/-3 Cs-1 37 163+/-10. 153+/-5 Co-58 54+/-8 54+/-2 Mn-54 81+/-9. 72+/-2 Fe-59 60+/-12 52+/-2 Zn-65 112+/-18 106+/-4 Co-60 191+/-10 182+/-6:'

12/07/06 Water-pCi/L Gross p 255+/-3 225+/-7

'See discussion at the beginning of the Appendix 75

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C-2 Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 3

102 pCi/m Air Iodine-A3 1/09/06 1-131 <MDA <MDA **

Air Iodine-A4 1/09/06 1-131 <MDA <MDA **

Air Filter -Al 1/09/06 Beta 1.7+/-0.2 1.9+/-0.2 **

Air Filter -A2 1/09/06 Beta 1.5+/-0.1 1.6+/-0.2 **

Air Filter -A3 1/09/06 Beta 1.1+/-0.2 1.4+/-0.2 **

Air Filter -A4 1/09/06 Beta 1.7+/-0.2 1.9+/-0.2 **

Air Filter -A5 1/09/06 Beta 1.5+/-0.2 1.6+/-0.2 **

Air Filter -SFAI 1/09/06 Beta 1.6+/-0.3 1.7+/-0.2 **

Air Filter -SFA2 1/09/06 Beta 1.4+/-0.2 1.6+/-0.2 **

Air Filter -SFA3 1/09/06 Beta 1 1 **

Air Filter -SFA4' 1/09/06 Beta 1.5+/-0.2 1.9+/-0.2 **

3 10-2 pCi/m Air Filter-Al 2/06/06 Beta 1.5+/-0.2 1.7+/-0.2 **

Air Filter-A2 2/06/06 Beta 1.2+/-0.2 1.3+/-0.2 **

Air Filter-A3 2/06/06 Beta 1.3+/-0.2 1.3+/-0.2 **

Air Filter-A4 2/06/06 Beta 2.1+/-0.3 2.3+/-0.2 **

Air Filter-A5 2/06/06 Beta 1.2+/-0.2 1.4+/-0.2 **

Air Filter-SFAI 2/06/06 Beta 1.3+/-0.2 1.5+/-0.2 **

Air Filter-SFA2 2/06/06 Beta 1.4+/-0.2 1.4+/-0.2 **

Air Filter-SFA3 2/06/06 Beta 1.1+/-0.2 1.1+/-0.2 **

Air Filter-SFA4 2/06/06 Beta 1.9+/-0.2 2.0+/-0.2 **

Air Iodine-Al 2/06/06 1-131 <MDA <MDA **

Air Iodine-A2 2/06/06 1-131 <MDA <MDA **

pCi/L Bay Water-Wa2 2/28/06 Gamma <MDA <MDA <MDA

"*The nature of these samples precluded splitting them with an independent laboratory.

1Result is below laboratory's LLD for this analysis 76

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 3

10-2 pCi/m Air Filter-Al 3/06/06 Beta 2.3+/-0.3 2.4+/-0.3 Air Filter-A2 3/06/06 Beta 1.9+/-0.2 1.8+/-0.2 Air Filter-A3 3/06/06 Beta 1.5+/-0.2 1.6+/-0.2 Air Filter-A4 3/06/06 Beta 2.3+/-0.3 2.2+/-0.3 Air Filter-A5 3/06/06 Beta 2.2+/-0.2 2.4+/-0.3 Air Filter-SFA1 3/06/06 Beta 2.1+/-0.2 2.2+/-0.2 Air Filter-SFA2 3/06/06 Beta 2.0+/-0.2 1.9+/-0.2 Air Filter-SFA3 3/06/06 Beta 1.9+/-0.2 2.0+/-0.2 Air Filter-SFA4 3/06/06 Beta 2.9+/-0.3 2.8+/-0.3 **

Air Iodine-A3 3/06/06 1-131 <MDA < MDA Air.lodine-A4 3/06/06 1-131 < MDA < MDA pCi/Kg Soil-SFS1 3/06/06 Gamma <MDA <MDA <MDA Soil-SFS2 3/06/06 Cs-1 37 <MDA 100+/-71. 142+/-92 Vegetation-SFbl 3/06/06 Gamma <MDA <MDA <MDA Vegetation-SFb2 3/06/06 Gamma <MDA <MDA <MDA Oysters-la3 3/24/06 Gamma <MDA <MDA <MDA pCi/L Bay Water-Wa2 4/28/06 Gamma <MDA <MDA <MDA ,

10)-2 pCi/m 3' Air Filter-Al 4/03/06 Beta 2.3+/-0.2 2.4+/-0.2 **

Air Filter-A2 4/03/06 Beta 2.1+/-0.2 1.8+/-0.2 Air Filter-A3 4/03/06 Beta 1.9+/-0.2 1.7+/-0.2 Air Filter-A4 4/03/06 Beta 2.3+/-0.2 2.1+/-0.2 Air Filter-A5 4/03/06 Beta 2.0+/-0.1 2.1+/-0.1 Air Filter-SFA1 4/03/06 Beta 2.6+/-0.2 2.4+/-0.2 Air Filter-SFA2 4/03/06 Beta 1.8+/-0.2 1.9+/-0.2 Air Filter-SFA3 4/03/06 Beta 2.0+/-0.2 1.9+/-0.2 Air Filter-SFA4 4/03/06 Beta 2.5+/-0.2 2.2+/-0.2

- The nature of these samples precluded splitting them with an independent laboratory.

77

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 10-2 pCi/m3 Air Iodine-Al 4/03/06 1-131 <MDA <MDA **

Air Iodine-A2 4/03/06 1-131 <MDA <MDA **

3 10-2 pCi/m Air Filters-Al 4/15/06 Gamma <MDA <MDA <MDA Air Filters-A2 4/15/06 Gamma <MDA <MDA <MDA Air Filters-A3 4/15/06 Gamma <MDA <MDA <MDA Air Filters-A4 4/15/06 Gamma <MDA <MDA <MDA Air Filters-A5 4/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA1 4/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA2 4/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA3 4/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA4 4/15/06 Gamma <MDA <MDA <MDA 3

10-2 pCi/m Air Iodine-A3 5/08/06 1-131 <MDA <MDA **

Air Iodine-A4 5/08/06 1-131 <MDA <MDA **

Air Filter-Al 5/08/06 Beta 1.4+/-0.2 1.3+/-0.2 Air Filter-A2 5/08/06 Beta 1.4+/-0.2 1.3+/-0.2 **

Air Filter-A3 5/08/06 Beta 1 1 **

Air Filter-A4 5/08/06 Beta 1.2+/-0.2 1.4+/-0.2 **

Air Filter-A4 5/08/06 Beta 1.5+/-0.2 1.5+/-0.2 **

Air Filter-SFA5 5/08/06 Beta 1.5+/-0.2 1.3+/-0.2 **

Air Filter-SFA2 5/08/06 Beta 1.3+/-0.2 1.4+/-0.2 **

Air Filter-SFA3 5/08/06 Beta 1.6+/-0.2 1.4+/-0.2 **

Air Filter-SFA4 5/08/06 Beta 1.8+/-0.2 1.7+/-0.2 **

pCi/L Bay Water-Wa2 5/31/06 Gamma <MDA <MDA <MDA

- The nature of these samples precluded splitting them with an independent laboratory..

'Result is below laboratory's LLD for this analysis 78

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 3

102 pCi/m Air Iodine-Al 6/05/06 1-131 <MDA <MDA **

Air Iodine-A2 6/05/06 1-131 <MDA <MDA **

3 10-2 pCi/m Air Filter-Al 6/05/06 Beta 1.5+/-0.2 1.3+/-0.2 Air Filter-A2 6/05/06 Beta 1.8+/-0.2 1.5+/-0.2 **

Air Filter-A3 6/05/06 Beta 1.9+/-0.3 1.7+/-0.2 **

Air Filter-A4 6/05/06 Beta 1.4+/-0.2 1.3+/-0.2 **

Air Filter-A5 6/05/06 Beta 2.0+/-0.2 1.7+/-0.2 Air Filter-SFA1 6/05/06 Beta 1.8+/-0.2 1.6+/-0.2 Air Filter-SFA2 6/05/06 Beta 1.7+/-0.2 1.7+/-0.2 **

Air Filter-SFA3 6/05/06 Beta 1.2+/-0.2 1.4+/-0.2 Air Filter-SFA4 6105/06. Beta 2.1+/-0.3 2.0+/-0.3 pCi/Kg Soil-SFS2 6/19/06 Cs-137 73+/-54 101+/-77 176+/-86 Soil-SFS4 6/19/06 Cs-1 37 86+/-70 88+/-67 <MDA Vegetation-SFb2 6/19/06 Gamma <MDA <MDA <MDA Vegetation-SFb4 6/19/06 Gamma <MDA <MDA <MDA pCi/Kg Shoreline-Wbl 6/26/06 Gamma <MDA <MDA 225+/-73 mR/90 Days DR05 6/30/06 TLD 10.78+/-0.67 11.26+/-0.84 **

DR06 6/30/06 TLD 9.67+/-0.68 9.77+/-1.25 **

DR07 6/30/06 TLD 9.53+/-0.86 9.76+/-0.67 **

DR08 6/30/06 TLD 13.83+/-1.72 14.24+/-0.78 **

DR09 6/30/06 TLD 10.62+/-0.86 10.50+/-1.29 DR1 0 6/30/06 TLD 10.15+/-0.84 10.17+/-1.02 DR11 6/30/06 TLD 10.51+/-0.85 10.08+/-1.15 **

DR29 6/30/06 TLD 14.90+/-1.12 15.73+/-1.80 **

DR31 6/30/06 TLD 14.98+/-1.33 14.54+/-0.83 **

- The nature of these samples precluded splitting them with an independent laboratory.

79

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis mR/90 Days SFDR14 6/30/06 TLD 36.43+/-3.88 34.21+/-7.21 **

SFDR15 6/30/06 TLD 22.89+/-3.02 23.66+/-6.11 **

3 10-2 pCi/m Air Filter-Al 7/03/06 Beta 1.8+/-0.2 1.5+/-0.2 **

Air Filter-A2 7/03/06 Beta 1.4+/-0.2 1.4+/-0.2 **

Air Filter-A3 7/03/06 Beta 1.5+/-0.2 1.6+/-0.2 **

Air Filter-A4 7/03/06 Beta 1.6+/-0.2 1.6+/-0.2 **

Air Filter-A5 7/03/06 Beta 2.6+/-0.3 2.5+/-0.2 **

Air Filter-SFA1 7/03/06 Beta 1.7+/-0.2 1.6+/-0.2 **

Air Filter-SFA2 7/03/06 Beta 1.6+/-0.2 1.6+/-0.2 **

Air Filter-SFA3 7/03/06 Beta 1.6+/-0.2 1.6+/-0.2 **

Air Filter-SFA4 7/03/06 Beta 2.2+/-0.3 2.4+/-0.3 **

Air Iodine-A3 7/03/06 1-131 <MDA <MDA **

Air Iodine-A4 7/03/06 1-131 <MDA <MDA **

pCi /kg Vegetation-lbl 7/24/06 Gamma <MDA <MDA <MDA Vegetation-lb2 7/24/06 Gamma <MDA <MDA <MDA Vegetation-1b4 7/24/06 Gamma <MDA <MDA <MDA Vegetation-lb5 7/24/06 Gamma <MDA <MDA <MDA Vegetation-lb7 7/24/06 Gamma <MDA <MDA <MDA Vegetation-lb8 7/24/06 Gamma <MDA <MDA <MDA 3

10-2 pCi/m Air Filter-Al 8/07/06 Beta 1.8+/-0.2 1.8+/-0.2 **

Air Filter-A2 8/07/06 Beta 2.4+/-0.3 2.5+/-0.3 **

Air Filter-A3 8/07/06 Beta 2.6+/-0.3 2.3+/-0.3 **

Air Filter-A4 8/07/06 Beta 2.1+/-0.2 1.8+/-0.2 **

Air Filter-A5 8/07/06 Beta 2.7+/-0.3 3.0+/-0.3 **

Air Filter-SFA1 8/07/06 Beta 1.6+/-0.2 1.8+/-0.2 **

Air Filter-SFA2 8/07/06 Beta 2.4+/-0.2 2.4+/-0.2 **

Air Filter-SFA3 8/07/06 Beta 2.3+/-0.2 2.1+/-0.2 **

Air Filter-SFA4 8/07/06 Beta 3.1+/-0.3 3.3+/-0.4 **

- The nature of these samples precluded splitting them with an independent laboratory.

80

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 3

10.2 pCi/m Air Iodine-Al 8/07/06 1-131 <MDA <MDA **

Air Iodine-A2 8/07/06 1-131 <MDA <MDA **

pCi/kg, Fish-lal 8/22/06 Gamma <MDA <MDA <MDA Oysters-la3 8/22/06 Gamma <MDA <MDA <MDA pCi/L Bay Water-Wa2 8/31/06 Gamma <MDA <MDA <MDA 10-2 pCi/m3 Air Iodine-A3 9/04/06 1-131 <MDA <MDA **

Air Iodine-A4 9/04/06 1-131 <MDA <MDA **

Air Filter-Al 9/04/06 Beta 1.3+/-0.2 1.7+/-0.2 **

Air Filter-A2 9/04/06 Beta 1.0+/-0.2 1.3+/-0.2 **

Air Filter-A3, 9/04/06 Beta 1.0+/-0.2 1.3+/-0.2 **

Air Filter-A4 9/04/06 Beta 0.9+/-0.2 1.2+/-0.2 **

Air Filter-A5 9/04/06 Beta 1.1+/-0.2 1.3+/-0.3 **

Air Filter-SFA1 9/04/06 Beta 1.0+/-0.2 1.1+/-0.2 **

Air Filter-SFA2 9/04/06 Beta 0.7+/-0.2 0.9+/-0.2 **

Air Filter-SFA3 9/04/06 Beta 0.8+/-0.2 1.2+/-0.2 **

Air Filter-SFA4 9/04/06 Beta 1.1+/-0.2 1.6+/-0.3 **

3 10-3 pCi/m Air Filters-Al 9/15/06 Gamma <MDA <MDA <MDA.

Air Filters-A2 9/15/06 Gamma <MDA <MDA <MDA Air Filters-A3 9/15/06 Gamma <MDA <MDA <MDA Air Filters-A4 9/15/06 Gamma <MDA <MDA <MDA Air Filters-A5 9/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA1 9/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA2 9/15/06 Gamma <MDA <MDA <MDA

- The nature of these samples precluded splitting them with an independent laboratory.

81

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 10-3 pCi/m 3 Air Filters-SFA3 9/15/06 Gamma <MDA <MDA <MDA Air Filters-SFA4 9/15/06 Gamma <MDA <MDA <MDA mR/90 Days DR05 09/30/06 TLD 11.36+/-0.72 11.64+/-1.29 DR06 09/30/06 TLD 10.00+/-1.12 9.74+/-1.34 DR07 09/30/06 TLD 10.14+/-0.52 10.09+/-0.97 DR08 09/30/06 TLD 14.86+/-1.54 11.59+/-4.35 DR09 09/30/06 TLD 11.35+/-1.66 9.96+/-1.11 DR1 0 09/30/06 TLD 10.51+/-1.56 9.27+/-1.19 DR11 09/30/06 TLD 10.65+/-0.70 9.27+/-1.05 SFDR14 09/30/06 TLD 32.69+/-1.13 29.65+/-3.24 SFDR15 09/30/06 TLD 24.37+/-3.19 20.99+/-2.16 DR29 09/30/06 TLD 14.46+/-0.87 13.09+/-2.09 DR31 09/30/06 TLD 15.29+/-0.51 12.95+/-1.13 pCi/kg Vegetation-lbl 10/02/06 Gamma <MDA <MDA <MDA Vegetation-lb2 10/02/06 Gamma <MDA <MDA <MDA Vegetation-lb4 10/02/06 Gamma <MDA <MDA <MDA Vegetation-lb5 10/02/06 Gamma <MDA <MDA <MDA Vegetation-lb7 10/02/06 Gamma <MDA <MDA <MDA Vegetation-lb8 10/02/06 Gamma <MDA <MDA <MDA 3

10-2 pCi/m Air Iodine-Al 10/09/06 1-131 <MDA <MDA **

Air Iodine-A2 10/09/06 1-131 <MDA <MDA

- The nature of these samples precluded splitting them with an independent laboratory.

82

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split -

And Location Date Analysis Analysis Analysis Analysis 3

10-2 pCi/m Air Filter-Al 10/09/06 Beta 1.6+/-0.2 1.5+/-0.2 **

Air Filter-A2 10/09/06 Beta 1.8+/-0.2 1.5+/-0.2 **

Air Filter-A3 10/09/06 Beta 1.6+/-0.3 1.7+/-0.3 **

Air Filter-A4 10/09/06 Beta 1.5+/-0.2 1.3+/-0.2 Air Filter-A5 10/09/06 Beta 2.1+/-0.3 2.0+/-0.3 **

Air Filter-SFA1 10/09/06 Beta 1.7+/-0.2 1.4+/-0.2 **

Air Filter-SFA2 10/09/06 Beta 1.3+/-0.2 1.4+/-0.2 **

Air Filter-SFA3 10/09/06 Beta 1.3+/-0.2 1.2+/-0.2 **

Air Filter-SFA4 10/09/06 Beta 2.5+/-0.3 2.2+/-0.3 **

Air Filter-Al 11/05/06 Beta 1.9+/-0.2 2.2+/-0.2 **

Air Filter-A2 11/05/06 Beta 2.3+/-0.3 2.3+/-0.2 **

Air Filter-A3 11/05/06 Beta 2.3+/-0.4 2.2+/-0.2 **

Air Filter-A4 11/05/06 Beta 2.1+/-0.2 2.5+/-0.2 **

Air Filter-A5 11/05/06 Beta 2.0+/-0.2 2.0+/-0.2 **

Air Filter-SFA1 11/05/06 Beta 2.3+/-0.2 2.2+/-0.3 **

Air Filter-SFA2 11/05/06 Beta 2.2+/-0.2 2.2+/-0.2 **

Air Filter-SFA3 11/05/06 Beta 1.9+/-0.2 2.1+/-0.2 **

Air Filter-SFA4 11/05/06 Beta 2.3+/-0.2 2.3+/-0.2 **

Air Iodine-A3 11/05/06 1-131 <MDA <MDA **

Air Iodine-A5 11/05/06 1-131 <MDA <MDA **

pCi/L Bay Water-Wa2 11/30/06 Gamma <MDA <MDA <MDA

- The nature of these samples precluded splitting them with an independent laboratory-83

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C Continued Results of Quality Assurance Program Sample Type Sample Type of Original Replicate Split And Location Date Analysis Analysis Analysis Analysis 3

10-2 pCi/m Air Filter-Al 12/04/06 Beta 1.4+/-0.2 1.6+/-0.2 Air Filter-A2 12/04/06 Beta 1.9+/-0.2 1.9+/-0.2 Air Filter-A3 12/04/06 Beta 1.8+/-0.2 1.7+/-0.2 Air Filter-A4 12/04/06 Beta 1.9+/-0.2 2.3+/-0.2 Air Filter-A5 12/04/06 Beta 2.0+/-0.2 2.0+/-0.2 Air Filter-SFA1 12/04/06 Beta 2.0+/-0.2 1.9+/-0.2 Air Filter-SFA2 12/04/06 Beta 2.1+/-0.2 1.9+/-0.2 Air Filter-SFA3 12/04/06 Beta 1.8+/-0.2 2.0+/-0.2 Air Filter-SFA4 12/04/06 Beta 2.2+/-0.2 1.8+/-0.2 Air Iodine-Al 12/04/06 1-131 <MDA <MDA Air Iodine-A2 12/04/06 1-131 <MDA <MDA

- The nature of these samples precluded splitting them with an independent laboratory 84

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 TABLE C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry Selected Bay Water Fish Shellfish Sediment Vegetation Particulates Nuclides pCi/I pCi/kg pCi/kg pCi/kg pCi/kg 10-3 pCi/m 3 H-3 175 -- -- -- -- --

Na-22 1 8 3 12 6 5 Cr-51 12 105 4 104 50 63 Mn-54 1 9 3 12 5 4 Co-58 1 9 4 9 4 5 Fe-59 3 28 9 24 10 12 Co-60 1 9 4 12 5 6 Zn-65 2 20 8 25 10 9 Nb-95 1 12 7 14 6 9 Zr-95 2 18 8 20 9 9 Ru-106 9 75 30 90 41 40 Ag-110m 1 10 10 10 5 4 Te-129m- 16 131 60 162 79 95 1-131 4 65 30 35 22 74 Cs-134 1. 8 4 10 5 4 Cs-137 1 9 4 10 5 4 BaLa-140 3 32 15 25 14 36 Ce-144 7 40 16 54 26 18 85

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 86

January 1 - December 31, 2006' 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.

Land Use Survey Discussion Diistance From Plant A Land Use Survey was conducted to identify, (miles) within a distance of 5 miles, the location of the Sector Resid ence' Garden nearest milk animal, the nearest residence, and SE-1 7 1.7 the nearest garden greater than 50 m 2 in each of SSE-3- 1.3 the nine sectors over land. A detailed description.- 1.

SSW 1.8 1.8-of the Land Use Survey is given in a separate SW 15 1.7 document (Ref. 9). The position of the nearest

.1 11 residence and garden in each sector out to 5 miles 1.2 1.4 is given in the adjacent table. There are no WNW 2. 3 1.5 animals producing milk for human consumption.

a new 5 2.5 within the 5 mile radius. There was NW 2. 1 2.1 residence located within the 5-mile radius in the SSW sector; however, its distance from the plant is the same as that-reported for the closest residence in that sector in 2005.

The closest residence is situated in the SW sector and the nearest garden is also in the SW sector, which is one of the leastprevalent wind directions. In the S, SSE, and SEsectors, 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 of0.4 miles, and another is situated near the site boundary in the SSE sector.at a distance iof 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.

87-

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 88

January 1 - December 31, 2006 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-1 1 shows the direct radiation readings from TLDs placed at the perimeter of the Resin Storage Area which is a 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.

89

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 (LEFT BLANK) 90

January 1 - December 31, 2006 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 Pow er P lant .............................................................................................................................. 92

'E-2 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental M onitoring Program .................................................................................. ,93 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program ........................................................... 94 E-4 Concentration of Gamma Emitters in Bottom Sediment ................................................... 95 E-5 Concentration of Iodine-131 in Filtered Air. ....................................................................... 96 E-6 Concentration of Beta Emitters in Air Particulates ............................................................ 98 E-7 Concentration of Gamma Emitters in Air Particulates .......................................................... 100 E-8 Concentration, of Tritium and Gamma Emitters in Taylors Island Well Water ............... 101 E-9 Direct Radiation as Measured in Pressurized Ion Chamber .............................................. 102 E-10 D irect R adiation ...... *................. ............................................................................................. 103 E- 11 Direct Radiation from Resin Storage Area ........................................................................... 104 91

January 1 - December 31, 2006 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, Carpenter's Property 12.6 7.8 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 PIC I Taylors Island, Carpenter's Property 12.6 7.8 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 RPDR1O Resin Storage Area- South Fence Lower 0.7 0.4 SW RPDR1 I 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 Wwl Taylors Island, Carpenter's Property 12.6 7.8 ENE Distance and direction from the central point between the two containment buildings.

92

January 1 - December 31, 2006 I Docket Nos. 50-317/50-318/72-8 Table E-2 Synopsis of 2006 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program Sample Type Sampling Number of Locations Number Collected Analysis Analysis Frequency Number Analyzed Frequency1 Aquatic Environment Bottom Q 2 4 Gamma Q 4 Sediment Atmospheric Environment 2

Air Iodine W 7 360 1-131 W 360 Air Particulates 3 W 3 154 Gross Beta W 154*

Gamma MVC 36 Direct Radiation Pressurized Ion M 6 72 Gamma M 72 Chamber Ambient Q 20 480 TLD Q 480 Radiation Terrestrial Environment Ground water M 2 12 H-3 M 12 Gamma M 12 1 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 93

January 1 - December 31, 2006 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 Type and Total Lower Limit of Indicator Locations Location with Highest Annual Control Locations Sampled (Unit of Number of Analyses Detection (LLD) Mean (F)/Rangel Highest Annual Mean (F) / Range Mean (F)/Range Measurement) Performed Mean Name/Distance &

Direction 2 Aquatic Environment Bottom Gamma (4) 17 232 (2/2) Discharge Area 232 (2/2) 152 (2/2)

Sediment Cs-1 37 (186-278) Wbs2 (186-278) (131-172.90)

(pCi/kg) 0.3 km N Atmospheric Environment Air Particulates Gross Beta (154) 0.5 1.7 (102/102) Long Beach A6 1.7 (52/52) 1.5 (52/52)

(10-2 pCi/m 3) (0.7-3.9) 4.4 km NW (0.7-3.9) (0.5-3.1)

Direct Radiation Ambient TLD (480) 21.27 (480/480) East Fence Right 47.88 (24/24)

Radiation (7.53-64.06) RPDR12 (15.28-64.06)

(mR/90 days) km Pressurized Ion Ionization Chamber 7.40 (60/60) NNW of ISFSI PIC4 11.32 (12/12) 6.22 (12/12)

Chamber (72) (4.26-13.04) 0.6 km SW (10.99-11.72) (5.66-6.71)

(mR/30 days)

Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses 2 From the centerpoint between the two containment buildings 94

January 1 - December 31, 2006 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) +/- 2a)

SAMPLE CODE Sample Cs-1 37 Gamma Emitters Date Wbs2 6/19/2006 186 +/-62 Discharge Area 10/26/2006 278 +/- 64 Wbs41 6/19/2006 173 +/- 62 Camp Conoy/ Rocky Point. 10/26/2006 131 +/-73 Control Location

All Non-Natural Gamma Emitters <MDA 95

P.

January 1 - December 31, 2006 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/M3 +/- 2a)

Start Date ' Stop Date A6 A7 CAM SFA1 SFA2 1 SFA3 SFA4 Long Taylors Cambridge MET Visitors NNW of SSE of Beach Island Station Center ISFSI ISFSI 2

1/2/2006 1/9/2006 1/9/2006 1/16/2006 *

2

J

* * *t 1/16/2006 1/23/2006 1/23/2006 1/30/2006

t 1/30/2006 2/6/2006 2/6/2006 2/13/2006 2/13/2006 2/20/2006 *t 2/20/2006 2/27/2006 2/27/2006 3/6/2006 3/6/2006 3/13/2006 *t

*t 3/13/2006 3/20/2006 3/20/2006 3/27/2006 2 *t 3/27/2006 4/3/2006 4/3/2006 4/10/2006 4/10/2006 4/17/2006 4/17/2006 4/24/2006 4/24/2006 5/1/2006 2

5/1/2006 5/8/2006 5/8/2006 5/15/2006

*t 5/15/2006 5/22/2006

t 5/22/2006 5/29/2006 *

2t 5/29/2006 6/5/2006 6/5/2006 6/12/2006 6/12/2006 6/19/2006 6/19/2006 6/26/2006

* *t

6/26/2006 7/3/2006

t 7/3/2006 7/10/2006 7/10/2006 7/17/2006 7/17/2006 7/24/2006 *t 7/24/2006 8/1/2006

t 8/1/2006 8/7/2006 "*

8/7/2006 8/14/2006 "*

8/14/2006 8/21/2006 8/21/2006 8/28/2006

'Control Location 2 Sampler malfunction; Loss of Data

<MDA 96

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table E Continued Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/M3 +/- 2a)

Start Date Stop Date A6 A7 CAM SFA1 SFA21 SFA3 SFA4 Long Taylors Cambridge MET. Visitors NNW of SSE of Beach Island Station Center ISFSI ISFSI 8/28/2006 9/4/2006 9/4/2006 9/11/2006 9/11/2006 9/18/2006 9/18/2006 9/25/2006:

9/25/2006 10/2/2006

t 10/2/2006' 10/9/2006 10/9/2006 10/16/2006 10/16/2006 10/23/2006 10/23/2006 10/30/2006

r 10/30/2006 11/6/2006 11/6/2006 11/13/2006 "*

11/13/2006 11/20/2006 11/20/2006 11/27/2006 11/27/2006 12/4/2006 12/5/2006 12/11/2006

* *k

12/12/2006 12/18/2006 12/18/2006 12/25/2006 12/25/2006 1/1/2007 1 Control Location

<MDA 97

'4 January 1 - December 31, 2006 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 +/- 2cr)

Start Date Stop Date A6 A7 1 CAM Long Beach Taylors Island Cambridge 1/2/2006 1/9/2006 1.2 +/- 0.2 1.9 +/- 0.2 1.6 +/- 0.2 1/9/2006 1/16/2006 1.5 +/- 0.2 1.4 +/- 0.2 1.2 +/-0.2 1/16/2006 1/23/2006 1.0 +/- 0.2 1.3 +/- 0.2 1.0 +/-0.2 1/23/2006 1/30/2006 1.3 +/- 0.2 1.6 +/- 0.2 1.3 +/-0.2 -,

1/30/2006 2/6/2006 1.3 +/-0.2 1.9 +/- 0.2 1.5 +/-0.2 2/6/2006 2/13/2006 1.7 +/- 0.2 1.7 +/-0.2 1.5 +/-0.2 2/13/2006 2/20/2006 2.2 +/- 0.2 2.9 +/- 0.3 2.1 +/70.2 2/20/2006 2/27/2006 2.0+/-0.2 2.5 +/- 0.3 2.0 +/- 0.2 2/27/2006 3/6/2006 1.9 +/-0.2 2.4 +/- 0.3 1.7 +/-0.2 3/6/2006 3/13/2006 2.0 +/-0.2 2.2 +/- 0.3 2.0 +/-0.2 3/13/2006 3/20/2006 2.3 +/- 0.2 2.8+/-0.3 2.1 +/-0.2 3/20/2006 3/27/2006 1.8 +/- 0.3 1.4 +/- 0.2 1.0 +/-0.2 3/27/2006 4/3/2006 1.9 +/-0.2 1.6 +/- 0.2 1.0 +/-0.2 4/3/2006 4/10/2006 1.5 +/-0.2 1.4 +/- 0.2 1.3 +/- 0.2 4/10/2006 4/17/2006 1.8 +/- 0.2 1.3 +/- 0.2 1.6 +/- 0.2 4/17/2006 4/24/2006 1.2 +/- 0.2 0.9 +/- 0.2 1.4 +/- 0.3 2

4/24/2006 5/1/2006 2.7 +/- 0.3 1.6 +/- 0.2 5/1/2006 5/8/2006 2.8 +/- 0.4 1.6 +/- 0.2 1.3 "+1- 0.4 2

5/8/2006 5/15/2006 1.0 +/-0.2 1.1 +/-0.2 5/15/2006 5/22/2006 1.1 +/-0.2 1.1 +/-0.2 1.0 +/-0.2 5/22/2006 5/29/2006 1.4 +/- 0.2 1.9 +/- 0.2 1.5 +/-0.2 5/29/2006 6/5/2006 1.3 +/- 0.2 1.1 +/-0.2 1.6 +/-0.2 6/5/2006 6/12/2006 1.1 +/-0.2 1.1 +/-0.2 0.9 +/-0.2 6/12/2006 6/19/2006 1.3+/-0.2 1.1 +/-0.2 1.0 +/- 0.2 6/19/2006 6/26/2006 0.7 +/- 0.1 0.7 +/- 0.1 0.8 +/- 0.2 6/26/2006 7/3/2006 1.3 +/- 0.2 1.5 +/- 0.2 1.9 +/-0.3 7/3/2006 7/10/2006 1.3 +/- 0.2 0.5+/-0.1 1.5 +/-0.2 7/10/2006 7/17/2006 1.9 +/- 0.2 1.4 +/-0.2 1.6 +/-0.2 7/17/2006 7/24/2006 1.0 +/- 0.2 1.5 +/-0.2 1.8 +/- 0.2 7/24/2006 7/31/2006 1.9 +/- 0.2 0.8 +/- 0.2 1.7 +/- 0.4 8/1/2006 8/7/2006 1.8 +/- 0.2 1.7 +/- 0.2 1.3 +/-0.2 8/7/2006 8/14/2006 2.1 +/-0.2 1.7 +/-0.2 1.7 +/-0.2 8/14/2006 8/21/2006 1.9 +/- 0.2 1.6 +/-0.2 1.6 +/-0.2 8/21/2006 8/28/2006 2.6+/-0.2 2.2+/-0.2 2.4 +/-0.2 1Control Location 2 Sampler malfunction; Loss of Data 98

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table E Continued Concentration of Beta Emitters in Air Particulates (Results in units of 1072 pCi/m3 +/- 2cr)

Start Date Stop Date A6 A7 1 CAM Long Beach Taylors Island Cambridge 8/28/2006 9/4/2006 1.2 +/-0.2 0.5 +/-0.1 0.9 +/-0.2 9/4/2006 9/11/2006 2.0 +/-0.2 1.7 +/-0.2 1.8 +/-0.2 9/11/2006 9/18/2006 0.9 +/- 0.2 1.0 +/- 0.2 0.9 +/-0.2 9/18/2006 9/25/2006 1.7 +/-0.2 1.5 +/-0.2 1.9 +/-0.2 9/25/2006 10/2/2006 1.6 +/-0.2 1.5 +/-0.2 1.7 +/-0.2 10/2/2006 10/9/2006 1.4 +/-0.2 1.8 +/-0.2 2.4 +/-0.3 10/9/2006- 10/16/2006 2.3 +/-0.2 1.7 +/-0.2 3.3 +/-0.3 10/16/2006 .10/23/2006 1.4 +/-.0.2 1.3 +/-0.2 1.8 +/-0.2 10/23/2006 10/30/2006 1.2 +/- 0.2- 1.1 +/- 0.2 1.8+/- 0.2 10/30/2006 11/6/2006 2.7+/-0.3 1.9+/-0.2 2.6+/-,0.2 11/6/2006 11/13/2006 1.4 +/- 0.2 0.9 +/- 0.2 1.2 +/- 0.2 11/13/2006 11/20/2006 1.7 +/- 0.2 1.3 +/- 0.2 1.8 +/-0.2 11/20/2006 11/27/2006 2.0+/-0.2 1.4+/-0.2 1.7+/-0.2 11/27/2006 12/4/2006 2.3+/-0.2 1.8+/-0.2 2.4+/-0.2 12/4/2006 12/11/2006 3.1 +/-0.3 2.1 +/-0.2 3.1 +/-0.2 12/12/2006 12/18/2006 3.9 +/- 0.2 3.1 +/- 0.2 3.4 +/- 0.2 12/18/2006 12/25/2006 2.0 +/-0.3 1.2 +/-0.2 1.4 +/-0.2 12/25/2006 1/1/2007 2.5 +/-0.2 1.5 +/-0.2 1.8 +/-0.2 99

C,.

January 1 - December 31, 2006 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/m3 +/- 2a)

Sample A6 A7 1 CAM Date Long Beach Taylors Island Cambridge 1/15/2006 2/15/2006 3/15/2006 4/15/2006 5/15/2006 6/15/2006 7/15/2006 8/15/2006 9/15/2006 10/15/2006

11/15/2006 12/15/2006

'Control Location

Non-Natural Gamma Emitters <MDA 100

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water (Results in units of 10-3 pCi/m 3 +/- 2ar)

Sample H-3 Gamma Emitters Date 1/31/2006 <460 2/28/2006 <461 3/29/2006 <456

t 05/02/2006 <460 5/31/2006 <460

k 7/03/2006 <457 8/1/2006 <340 8/29/2006 <344

t 9/26/2006 <340 10/31/2006 <340 11/28/2006 <340 12/27/2006 <340 *

Non-Natural Gamma Emitters <MDA 101

1 January 1 - December 31, 2006 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 PIC1 1 JAN 6.03 +/- 0.60 FEB 6.40 +/- 0.64 MAR 6.71 +/- 0.67 APR 6.68 +/- 0.67 Taylor's Island MAY 6.51 +/- 0.60 JUN 6.64 +/- 0.66 JUL 5.83 +/- 0.60 AUG 6.32 +/- 0.63 SEP 6.33 +/- 0.63 OCT 5.84 +/- 0.58 NOV 5.66 +/-0.57 DEC 5.70 +/- 0.57 PIC2 JAN 4.30 +/- 0.43 FEB 4.30 +/- 0.43 Entrance to Camp MAR 4.93 +/- 0.49 APR 4.37 +/- 0.44 Conoy MAY 4.38 +/- 0.44 JUN 4.38 +/- 0.44 JUL 4.33 +/- 0.40 AUG 4.37 +/- 0.44 SEP 4.30 +/- 0.43 OCT 4.33 +/- 0.43 NOV 4.26 +/- 0.43 DEC 4.27 +/- 0.43 PIC3 JAN 5.07 +/- 0.51 FEB 5.06 +/- 0.51 MET Station MAR 5.24 +/- 0.52 APR 5.36 +/- 0.54 MAY 5.51 +/-0.55 JUN 5.89 +/- 0.59 JUL 5.72 +/- 0.60 AUG 5.67 +/- 0.57 SEP 5.58 +/- 0.56 OCT 5.60 +/- 0.56 NOV 5.94 +/-0.59 DEC 5.96 +/- 0.60 PIC4 JAN 11.14 +/- 1.11 FEB 11.20 +/- 1.12 NNW of ISFSI MAR 11.55 +/- 1.16 APR 11.72 +/- 1.17 MAY 11.60 +/- 1.16 JUN, 11.51 +/-1.15 JUL 11.03 +/- 1.10 AUG 11.13 +/- 1.13 SEP 11.00 +/- 1.10 OCT 10.99 +/- 1.10 NOV 11.39 +/- 1.14 DEC 11.55 +/-1.16 PIC5 JAN 6.62 +/- 0.66 FEB 6.61 +/- 0.66 SSE of ISFSI MAR 9.19 +/- 0.92 APR 13.04 +/- 1.30 MAY 12.53 +/- 1.25 JUN 12.11 +/- 1.21 JUL 11.61 +/- 1.16 AUG 11.78 +/- 1.18 SEP 11.24 +/-1.12 OCT 11.22 +/- 1.12 NOV 10.89 +/- 1.09 DEC 10.82 +/- 1.08 PIC8 JAN 4.88 +/- 0.49 FEB 4.93 +/- 0.49 Visitor's Center MAR 5.22 +/- 0.52 APR 5.63 +/- 0.56 MAY 5.58 +/- 0.56 JUN 5.34 +/- 0.53 JUL 4.97 +/- 0.50 AUG 5.06 +/- 0.51 SEP 4.91 +/- 0.49 OCT 4.95 +/- 0.50 NOV 4.87 +/- 0.49 DEC 4.89 +/- 0.49 1Control Location 102

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table E-10 Direct Radiation (Results in units of mR/90 days +/- 2cT)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR24 Rt. 4 and Parran Rd. 11.84 +/- 0.66 10.96 +1-1.08 10.97 +/- 0.35 11.68 +/- 1.09 DR25 Camp Conoy Guard 12.30 +/- 1.16 11.75 +/- 0.99 11.93 +/-1.11 12.72 +/- 1.30 House DR26 Rt. 235 and Clark's 10.43 +/- 0.66 10.64 +/- 1.14 10.43 +/- 0.84 10.70 +/- 0.81 Landing Road DR27 Rt. 231 and Rt. 4 10.96 +/- 0.56 10.36 +/- 1.16 10.77 +/- 0.99 11.25 +/- 1.01 DR28 Taylors Is. Siren #35 12.99 +1-.11 13.29 +/- 1.63 13.91 +/- 1.59 13.36 +/- 1.76 DR29 Taylors Is. Siren #38 14.65 +/-2.26 14.90 +/- 1.12 14.46 +/- 0.87 13.37 +/- 1.61 DR31 Cambridge 14.60 +1-1.27 14.98 +/- 1.33 15.29 +/- 0.51 15.90 */'2.56 DR32 Twining Property, 13.24 +/- 1.04 13.83 +/- 2.23 14.28 +/- 0.78 13.32 +/- 1.61 Taylors Island DR33 P. A. Ransome Property 14.57 +/- 2.18 15.34 +/- 0.76 15.22 +/- 1.62 15.16 +/- 2.18 DR34 Shoreline at Barge Rd. 9.48 +/- 0.38 9.42 +/- 0.73 9.53 +/- 0.83 9.55 +/- 0.88 OSG1 North of Old Steam 17.83 +/- 1.46 18.98 +/- 1.25 18.97 +/- 1.80 19.51 +/-1.61 Generator Storage Facility OSG2 West of Old Steam 15.35 +/- 1.97 16.71 +/- 2.15 16.65 +/- 2.00 17.18 +/- 2.21 Generator Storage Facility 103

January 1 - December 31, 2006 Docket Nos. 50-317/50-318/72-8 Table E-11 Direct Radiation from Resin Storage Area (Results in units of mR/90 days +/- 2a)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter RPDR05 North Fence Lower 18.88 +/-2.01 47.30 +/- 3.01 28.68 +/- 1.21 36.75 +/- 3.57 RPDR06 North Fence Upper 19.86 +/- 1.10 33.37 +/-4.48 28.57 +/-2.05 40.82 +1-4.65 RPDR07 West Fence Right 30.46 +/-2.75 51.29 +1-3.73 16.17 +/-2.08 8.05 +/- 0.63 RPDR08 West Fence Left 57.86 +/- 5.90 55.47 +/- 2.06 7.53 +/- 0.65 10.35 +/- 0.35 RPDR09 South Fence Upper 35.99 +/- 2.82 46.58 +/- 3.48 54.42 +/- 2.27 12.63 +/- 1.38 RPDR10 South Fence Lower 26.36 +/-2.37 37.41 +/- 3.86 42.34 +/-4.00 10.82 +/-0.78 RPDR11 East Fence Left 22.10 +/-2.18 24.54 +1-3.35 46.06 +/- 5.78 14.08 +/- 1.26 RPDR12 East Fence Right 52.61 ÷/- 3.24 64.06 +/- 1.71 59.57 +/- 2.16 15.28 +/- 1.13 104

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