Text

Transmittal of 2007 Annual Radiological Environmental Operating Report
	ML093160352
Person / Time
Site:	Seabrook
Issue date:	04/19/2008
From:	St.Pierre G; Florida Power & Light Energy Seabrook
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	FOIA/PA-2010-0209, SBK-L-08065
	Download: ML093160352 (226)
	v • d • e

U . FPL Energy Seabrook Station P.O. Box 300 FPL Energy Seabrook, NH 03874 Seabrook Station (603) 773-7000 Ap-ril 19, 2008 Docket No. 50-443 SBK-L-08065 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Seabrook Station 2007 Annual Radiological Environmental Operating Report Pursuant to the requirements of 10 CFR 50.36a(a)(2) and Seabrook Station Technical Specification 6.8.1.3, FPL Energy Seabrook, LLC submits the 2007 Annual Radiological Environmental Operating Report. The report summarizes the implementation of the FPL Energy Seabrook, LLC Radiological Environmental Monitoring Program (REMP). Attachment I to the report is the complete data set for the REMP samples.

A copy of this report is also being provided to the Commonwealth of Massachusetts, Department of Public Health; and the State of New Hampshire, Bureau of Radiological Health.

Should you require further information regarding this matter, please contact Mr. Donald Flahardy, Health Physics Department Manager, at (603) 773-7312.

Very truly yours, FPL Energy Seabrook, LLC Gene F. St. Pierre Site Vice President an FPL Group company

U. S. Nuclear Regulatory Commission SBK-L-08065/ Page 2 cc: with enclosure S. J. Collins, NRC Region I Administrator G. E. Miller, NRC Project Manager, Project Directorate 1-2 W. J. Raymond, NRC Senior Resident Inspector NH DHHS Office of Community & Public Health Bureau of Radiological Health 29 Hazen Drive Concord, NH 03301-6527 Massachusetts Department of Public Health Radiation Control Program 90 Washington Street Dorchester, MA 02121

FPL Energy Seabrook Station 2007 Annual Radiological Environmental Operating Report April 2008

SEABROOK STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT For the Period January - December 2007 Docket No. 50-443 Prepared By:

FPL Energy Seabrook Station Health Physics Department Seabrook Station And AREVA NP Nuclear & Radiation Engineering Marlborough, Massachusetts 01752 Prepared By: _k *z/ Q Date:

Mark Strum - AREVA NP Reviewed By: Date: [ /

David Perkins - FPL Energy Seabrook Station Date:

Approved By:

Donald Flahardy - CHP, FPL E6ergý Seabrook Station

SEABROOK STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT For the Period January - December 2007 April .2008 Docket No. 50-443 Prepared By:

FPL Energy Seabrook Station Health Physics Department Seabrook Station And AREVA NP Nuclear & Radiation Engineering Marlborough, Massachusetts 01752 ii

'TABLE OF CONTENTS EXECUTIVE

SUMMARY

................................................................................................. IV LIST OF TABLES ........................................................................................................... VI LIST OF FIGURES.......................................................................................................... VII

1.0 INTRODUCTION

...................................................................................................... 1 2.0 ENVIRONMENTAL MONITORING PROGRAM................................... 9........................... 2 3.0

SUMMARY

OF RADIOLOGICAL ENVIRONMENTAL DATA............................................ 13 3.1 AIR PARTICULATE......................................................................................................... 14 3.2 CHARCOAL FILTERS...................................................................................................... 22 3.3 MILK....................................................................................................................... 24 3.4 SURFACE WATER......................................................................................................... 31 3.5 GROUND WATER......................................................................................................... 34 3.6 SEDIMENT................................................................................................................. 39 3.7 FISH ....................................................................................................................... 42 3.8 LOBSTERS ................................................................................................................. 45 3.9 SHELLFISH................................................................................................................. 48 3.10 IRISHMOSS ............................................................................................................ 52 3.11 FOOD CROP............................................................................................................. 55 3.12 VEGETATION........................................................................................................... 58 3.13 DIRECT RADIATION................................................................................................... 61 4.0 PROGRAM DEVIATIONS AND REPORTING................................................................... 83 4.1 SAMPLING PROGRAM DEVIATIONS..................................................................................... 83 4.2 COMPARISON OF ACHIEVED LLDS WITH REQUIREMENTS.......................................................... 84 4.3 COMPARISON OF RESULTS AGAINST REPORTING LEVELS ........................................................... 84 5.0 QUALITY ASSURANCE PROGRAM............................................................................... 87 5.1 INTRALABORATORY QUALITY CONTROL PROGRAM ................................................................. 87 5.2 THIRD PARTY CROSS CHECK PROGRAM .............................................................................. 87 5.3 BLIND DUPLICATE PROGRAM........................................................................................... 88 5.4 ENVIRONMENTAL TLD QUALITY ASSURANCE PROGRAM........................................................... 88 6.0 LAND USE CENSUS.................................................................................................. 95 ATTACHMENT 1: SAMPLE ANALYSIS DATA LIST FOR 2007 ................................................. 97

Executive Summary The Radiological Environmental Monitoring Program (REMP) for Seabrook Station operated successfully for the period of January through December 2007. This report describes the REMP and its implementation as required by Technical Specifications and defined in the Offsite Dose Calculation Manual (ODCM). It also contains analytical results, data evaluation, dose assessment, and data trends for each environmental sample media. Also included are the results of the Land Use Census, historical data, and the AREVA NP ENVIRONMENTAL LABORATORY (E-Lab) performance in the Quality Assurance Intercomparison Program required by the ODCM.

Radioactivity levels in the vicinity of Seabrook Station from January 1 through December 31, 2007 in air, water, sediment, milk, fish, food crops, vegetation and direct radiation measurement have been analyzed, evaluated, and summarized. The results of the REMP are intended to supplement the results of the radiological effluent monitoring by verifying that the measurable concentration of radioactive materials and levels of radiation are not higher than expected on the basis of the effluent measurement and modeling of the environmental exposure pathways.

Radiation and radioactivity in the environment is monitored within a 10-mile radius of the site. Two types of samples are taken. The first type, control samples, is collected from areas that are beyond measurable influence of Seabrook Station. These samples are used as reference data. Normal background radiation levels, or radiation present due to causes other than Seabrook Station, can thus be compared to the environment surrounding the nuclear power station. Indicator samples are the second sample type obtained. These samples show how much radiation or radioactivity is contributed to the environment by the site. Indicator samples are taken from areas close to the station where any plant contribution will be at the highest concentration. The ODCM minimum required REMP (broad leaf vegetation substituted for lack of sufficient milk locations) includes the collection of 548 samples per year, with a total of 2112 individual measurement analyses. In 2007, the total number of collected samples (required plus extra or special) equaled 923 taken from 97 locations around Seabrook Station. These included aquatic, atmospheric, and terrestrial environments. An estimated 5891 individual measurement analyses were performed on these samples. The environmental program is outlined in Table 2.1.

Prior to station operation, samples were collected and analyzed to determine the amount of radioactivity present in the area. The resulting values are used as a "pre-operational baseline." Current analysis results from the indicator samples are compared to both current control sample values and the pre-operational baseline to determine if changes in radioactivity levels are attributable to station operations.

A report is required to be submitted to the Nuclear Regulatory Commission when the level of radioactivity in an environmental sampling medium exceeds the limits specified in the Offsite Dose Calculation Manual (ODCM) when averaged over any calendar quarter. Also, when more than one of the radionuclides is detected in the sampling medium, this report shall be submitted if:

Concentration (1) + Concentration (2) + ...2> 1.0 Limit Level (1) Limit Level (2)

Based on the analytical results of environmental samples during 2007, Seabrook Station reporting levels were not exceeded.

Radioactivity detected was attributable to naturally occurring radionuclides, previous nuclear weapons tests and other man-made sources.

In 2007, the maximum whole body dose to the hypothetically exposed individual was 0.0189 millirem.

This whole body dose is the sum of all the exposure pathways for liquid and gaseous effluents, plus the direct whole body dose from station operations. This total represents approximately 0.08% of the whole body dose limits for a member of the public as set forth in 40CFRI 90.

iv

The average person in the United States receives about 360 mrem/yr (0.36 rem/yr) from natural background and man-made radiation sources (NCRP Report No. 93, "Ionizing Radiation Exposure of the Population of the United States" (1987)). This estimate for natural background was revised from about 100 to 300 mrem because of the inclusion of radon gas which has always been present but Was not previously included in the calculations. In some regions of the country, the amount of natural radiation is significantly higher. Residents of Colorado, for example, receive an additional 60 mrem/yr due to the increase in cosmic and terrestrial radiation levels. In fact, for every 100 feet above sea level, a person will receive an additional 1 mrem/yr from cosmic radiation. In several regions of the world, naturally high concentrations of uranium and radium deposits result in doses of several thousand mrem/yr to their residents (CRC Handbook. "Radioecology: Nuclear Energy and the Environment." F. Ward Whicker and Vincent Schultz, Volume 1, 1982).

Analytical results are divided into four ODCM required categories based on exposure pathways: Airborne, direct radiation, ingestion, and waterborne. Each of these pathways is described below:

The airborne exposure pathway includes airborne iodine and airborne particulate. The 2007 results were similar to previous years. There was no notable increase in natural products and no detectable fission products or other radionuclides in the airborne particulate media during the year.

The direct exposure pathway measures environmental radiation doses by use of thermoluminescent dosimeters (TLDs). TLD results have indicated a stable trend and compare well with previous years which reflect the natural variability of background radiation from one location to another. No detectable radiation contribution from Seabrook Station sources were identified via TLD environmental measurements off-site during the course of 2007.

The ingestion exposure pathway includes milk, fish and food products (leafy vegetation) samples.

The gamma spectroscopy counting indicated positive results for potassium-40 (K-40) at average environmental levels. There was one positive Cs-1 37 measurements just above the MDC in goat's milk collected from one farm in the site area. No other terrestrial samples or records of release indicate that Seabrook was the source of the radioactivity. The low level of detected cesium is likely the result of past weapons testing fallout that has been incorporated in feeding pathways for the goats.

The waterborne exposure pathway includes surface (ocean) water, drinking water supply, shallow well water, sea algae (Irish Moss) and sediment. Water samples were analyzed for tritium, gross-beta and gamma-emitting radionuclides. Irish Moss was analyzed for gamma-emitting radionuclides. Tritium was not identified in the samples analyzed. For groundwater, the gross beta activity seen at both locations is similar to what was seen in the pre-operational program and is consistent with results from previous years of commercial operations. Gamma analysis of samples indicated no plant-related gamma-emitting radionuclides above detection limits.

The results of the 2007 Radiological Environmental Monitoring Program continues to clearly demonstrate that there is no significant short term or chronic long-term radiological impact on the environment in the vicinity of Seabrook Station from plant operations. No abnormal radiological characteristics were identified or observed in the surrounding environs. Plant effluents contribute no measurable radiation exposure to the general public as confirmed and assessed by the REMP. Environmental radiation levels measured at the site boundary and near the nearest resident are at background levels. This is consistent with previous data. As a result, no increasing or decreasing trends were identified.

v

LIST OF TABLES Number Title Page 2.1 Radiological Environmental Monitoring Program ................................................. 3 2.2 Radiological Environmental Monitoring Locations .................................................. 4 3.1 Environmental TLD Measurements ......................................................................... 62 3.2 Pre-Operational Environmental TLD Measurements ........................................ 64 4.1 Detection Capabilities for Environmental Sample Analysis ....................................... 86 4.2 Reporting Levels for Radioactivity Concentrations in Environmental Samples ...... 87 5.1 E-LAB Results in Intralaboratory Process Control Program ..................................... 90 5.2 E-LAB Results in the Analytics Cross check Program .................................................. 91 5.3 Summary of Blind Duplicate Samples ...................................................................... 95 6.1 2007 Land Use Census Results ............................................................................... 97 vi

LIST OF FIGURES Number Title Paqe Figure 2.1 Radiological Environmental Monitoring Locations within 4 Kilometers of Seabrook Station .......................... 7 Figure 2.2 Radiological Environmental Monitoring Locations Between 4 & 12 Kilometers of Seabrook Station ............... 8 Figure 2.3 Radiological Environmental Monitoring Locations Outside 12 Kilometers of Seabrook Station ...................... 9 Figure 2.4 Direct Radiation Monitoring Locations Within 4 Kilometers of Seabrook Station ........................... 10 Figure 2.5 Direct Radiation Monitoring Locations Between 4 & 12 Kilometers of Seabrook Station ................................................... 11 Direction Radiation Monitoring Locations Outside Figure 2.6 12 Kilometers of Seabrook Station ............................................. 12 Figure 3.1 Gross-Beta Measurements of Air Particulate Filters ............................ 15 Figure 3.1.1 Gross-Beta Measurements of Air Particulate Filters Q uarterly A verages ................................................................. .16 Figure 3.1.2 Gross-Beta Measurements of Air Particulate Filters Q uarterly Averages ................................................................. .17 Figure 3.1.3 Gross-Beta Measurements of Air Particulate Filters Q uarterly A verages ................................................................. .18 Figure 3.2 Gross-Beta on Air Particulate Filters Quarterly Averages ................. 19 Figure 3.3 C esium -137 in Milk ................................................................. .25 Figure 3.3.1 Cesium-1 37 in Milk Annual Average Concentrations ....................... 26 Figure 3.4 C esium -137 in, Milk ................................................................. .27 Figure 3.4.1 Cesium-1 37 in Milk Annual Average Concentrations ....................... 28 Figure 3.5 Gross-Beta Measurements of Ground Water ................................ 35 Figure 3.5.1 Gross-Beta Measurements of Ground Water Sem i-Annual Averages ............................................................ 36 Figure 3.6 Environmental Radiation Measurements (Using TLD's) ................... 65 Figure 3.6.1 Environmental Radiation Measurements (Using TLD's) ................... 66 Figure 3.7 Environmental Radiation Measurements (Using TLD's) ................... 67 Figure 3.7.1 Environmental Radiation Measurements (Using TLD's) ................... 68 Figure 3.8 Environmental Radiation Measurements (Using TLD's); ........... 69 vii

List of Figures (cont'd)

Figure 3.8.1 Environmental Radiation Measurements (Using TLD's) ...................... 70 Figure 3.9 Environmental Radiation Measurements (Using TLD's) ...................... 71 Figure 3.9.1 Environmental Radiation Measurements (Using TLD's) ..................... 72 Figure 3.10 Environmental Radiation Measurements (Using TLD's) ..................... 73 Figure 3.10.1 Environmental Radiation Measurements (Using TLD's) ..................... 74 Figure 3.11 Environmental Radiation Measurements (Using TLD's) ..................... 75 Figure 3.11.1 Environmental Radiation Measurements (Using TLD's) ...................... 76 Figure 3.12 Environmental Radiation Measurements (Using TLD's) .................. 77 Figure 3.12.1 Environmental Radiation Measurements (Using TLD's) .................. 78 Figure 3.13 Environmental Radiation Measurements (Using TLD's) .................. 79 Figure 3.13.1 Environmental Radiation Measurements (Using TLD's) ...................... 80 Figure 3.14 Environmental Radiation Measurements (Using TLD's) ................... 81 Figure 3.14.1 Environmental Radiation Measurements (Using TLD's) ....................... 82 viii

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT 1.0 Introduction FPL Energy Seabrook, LLC's Radiological Environmental Monitoring Program (REMP) at Seabrook Station has been designed and carried out to achieve the following specific objectives:

To provide an indication of the appearance or accumulation of any radioactive material in the environment caused by the operation of the nuclear power station.

To provide assurance to regulatory agencies and the public that the station's environmental impact is known and within anticipated limits.

To verify the adequacy and proper functioning of station effluent controls and monitoring systems.

To provide standby monitoring capability for rapid assessment of risk to the general public in the event of unanticipated or accidental releases of radioactive material.

FPL Energy Seabrook, LLC collected the terrestrial samples. Normandeau Associates, Inc. collected the marine and sediment samples. After initial processing, the samples were sent to the AREVA NP Environmental Laboratory in Westborough, Massachusetts for further processing and radionuclide analysis. AREVA NP also processed the environmental thermoluminescent dosimeters (TLD's).

This report is a summary of the findings of the Radiological Environmental Monitoring Program for 2007.

It is being provided in compliance with Part A of Seabrook Stations Offsite Dose Calculation Manual (ODCM) and Technical Specification 6.8.1.3.

2.0 Environmental Monitoring Program Table 2.1 outlines the monitoring program as specified in the Seabrook Station ODCM, Part B, Section 4.

Table 2.2 lists the operational sampling stations and their specific locations (distances are measured from the center of the Unit 1 Containment Building). The sampling locations are shown on maps in Figures 2.1 through 2.6. The sampling and analysis program as described above fulfills the minimum requirements for environmental sample collection and analysis as contained in the ODCM Table A.9.1-1, and includes additional sampling of various pathways and locations beyond the minimum.

Below are listed the two-letter media codes and what they represent:

AP Air Particulate CF Charcoal Filter TM Milk WG Ground Water WS Surface (Sea) Water SE Sediment FH Fin fish HA Lobsters MU Mussels (Shellfish - edible portion only)

MS Mussels (Shellfish - shell portion only)

TL Direct Radiation (TLD)

AL Irish Moss (algae)

TF Food Crop TG Vegetation Table 2.1 Radioloaical Environmental Monitorina Proaram Media Sampling Frequency Required Analyses Air Particulate (AP) -Bi-Weekly Gross Beta

-Quarterly Composite Gamma spectroscopy Charcoal Filter (CF) -Bi-Weekly 1-131 Milk (TM) -Monthly (Semimonthly Gamma spectroscopy When animals 1-131 are on pasture)

-Monthly Surface (Sea) Water (WS) Gamma spectroscopy

-Quarterly Composite H-3 (composite)

Sediment (SE) -Semiannually Gamma spectroscopy Fish & Invertebrates -Quarterly or Gamma spectroscopy (FH, HA, MU) -Semiannually Direct Radiation (TL) -Quarterly Integrated gamma exposure Irish Moss (AL) -Semiannually Gamma Spectroscopy Ground Water (WG) -Quarterly Gamma Spectroscopy Gross Beta H-3 Food Crops (TF) -Monthly/Growing Season Gamma Spectroscopy Vegetation (TG) -Monthly/Growing Season Gamma Spectroscopy 1-131 Table 2.2 Radioloqical Environmental Monitorinq Locations 2007 Distance From Direction Station Code Station Plant From (Media - Sta. No.) Description Zone (km) Plant AP/CF-01+ PSNH Barge Landing Area 1 2.6 ESE AP/CF-02+ Hampton Marina 1 2.5 E AP/CF-03+ Southwest Boundary 1 1.0 SW AP/CF-04+ West Boundary 1 1.2 W AP/CF-05 Winnacunnet High School 1 4.0 NNE AP/CF-07+ PSNH Substation 1 5.7 NNW AP/CF-08 E&H Substation 1 3.4 SSE AP/CF-09+ Georgetown Electric Light Co. 2 21.4 SSW TM-09 Hampton, NH 1 5.3 NNW TM-15 Hampton Falls, NH 1 6.9 NW TM-20 Rowley, MA 2 17.0 S TM-23 Newbury, MA 2 12.0 S TM-24 North Hampton, NH 1 8.1 NNE WG-01 Seabrook Town Wells 1 5.6 W WG-13 Seabrook Station Well No. 13 1 1.0 N WG-14 Brimmer Lane 1 1.3 NNW WS-01+ Hampton-Discharge Area 1 5.3 E WS-51 + Ipswich Bay 2 16.9 SSE WS-02 Seabrook Marsh 1 0.1 SSE SE-02 Hampton-Discharge Area 1 5.3 E SE-07 Hampton Beach 1 3.1 E SE-08+ Seabrook Beach 1 3.2 ESE SE-52 Ipswich Bay 2 16.9 SSE SE-57 Plum Island Beach 2 15.9 SSE FH-03+ Hampton-Discharge Area 1 4.5 ESE FH-53+ Ipswich Bay 2 16.4 SSE HA-04+ Hampton-Discharge Area 1 5.5 E HA-54+ Ipswich 2 17.2 SSE MU-06+ Hampton-Discharge Area 1 5.2 E MU-09 Hampton Harbor 1 2.6 E MU-56+ Ipswich Bay 2 17.4 SSE MU-59 Plum Island 2 15.8 SSE MS-06 Hampton-Discharge Area 1 5.2 E MS-56 Ipswich Bay 2 17.4 SSE AL-05 Hampton-Discharge Area 1 5.2 E AL-55 Ipswich Bay 2 17.4 SSE TF-02 Hampton Falls, NH 1 5.0 WNW TF-03 Salisbury, Ma 1 5.1 SW TF-06 Ipswich, Ma 2 26.0 S Table 2.2 (Cont'd)

Radioloqical Environmental Monitorinq Locations 2007 Distance From Direction Station Code Station Plant From (Media - Sta. No.) Description Zone (km) Plant TG-08+ North Access Rd, Site Boundary 1 1.05 W TG-09+ General Office Bid. Site Boundary 1 0.94 SW TG-10+ Georgetown Electric Light Co. 2 21.4 SSW TL-1+ Brimmer's Lane, 1.0 N Hampton Falls TL-2+ Landing Road, Hampton 3.0 NNE TL-3+ Glade Path, Hampton Beach 1 2.9 NE TL-4+ Island Path, Hampton Beach I 2.3 ENE TL-5+ Harbor Road, Hampton Beach 1 2.6 E TL-6+ PSNH Barge Landing Area 1 2.7 ESE TL-7+ Cross Road, Seabrook Beach 1 2.6 SE TL-8+ Farm Lane, Seabrook 1.3 SSE TL-9+ Farm Lane, Seabrook 1.3 S.

TL-10+ Site Boundary Fence 1.2 SSW TL-11+ Site Boundary Fence 1.0 SW TL-12+ Site Boundary Fence 1.2 WSW TL-13+ Inside Site Boundary I 1.2 W TL-14+ Trailer Park, Seabrook 1.1 WNW TL-15+ Brimmer's Lane, 1.3 NW Hampton Falls TL-16+ Brimmer's Lane 1.2 NNW Hampton Falls TL-17+ South Road, North Hampton 0 7.8 N TL-18+ Mill Road, North Hampton 0 7.6 NNE TL-19+ Appledore Avenue, 0 7.7 NE North Hampton TL-20+ Ashworth Avenue, 0 3.2 ENE Hampton Beach TL-21+ Route 1A, Seabrook Beach 0 3.7 SE TL-22+ Cable Avenue, Salisbury 0 7.6 SSE Beach TL-23+ Ferry Road, Salisbury 0 8.1 S TL-24+ Ferry Lots Lane, 0 7.2 SSW Salisbury TL-25+ Elm Street, Amesbury 0 7.6 SW TL-26+ Route 107A, Amesbury 0 8.1 WSW TL-27+ Highland St. S. Hampton 0 7.5 W TL-28+ Rte. 150, Kensington 0 7.5 WNW TL-29+ Frying Pan Ln., Hampton Falls 0 7.2 NW TL-30+ Route 27, Hampton 0 7.6 NNW Table 2.2 (Cont'd)

RadioloQical Environmental Monitoring Locations 2007 Distance From Direction Station Code Station Plant From (Media - Sta. No.) Description Zone (km) Plant TL-31+ Alumni Drive, Hampton S 3.8 NNE TL-32+ Seabrook Elementary School S 2.0 S TL-33+ Dock Area, Newburyport S 9.8 S TL-34+ Bow Street, Exeter S 12.0 NW TL-35+ Lincoln Ackerman School S 2.3 NNW TL-36+ Route 97, Georgetown 2 22.6 SSW TL-37+ Post Office Plaistow, NH 2 21.5 WSW TL-38+ Emerson St. Hampstead, NH 2 27.7 W TL-39+ Fremont, NH 2 27.0 NW TL-40+ Newmarket, NH 2 21.6 NNW TL-41 Portsmouth, NH 2 21.0 NNE TL-42 Ipswich, MA 2 22.8 SSE TL-43 Education Center S 0.3 ENE TL-44 Rocks Road Landing S 0.6 SW TL-45 Hampton Fire Station S 4.4 NE TL-46 Seabrook Beach S 2.8 ESE TL-47 Hampton Falls, NH S 4.1 WNW Zone indices are: 1 Indicator Stations; 2 = Control Stations; 0 = Outer Ring TLD; I= Inner Ring TLD; S = Special Interest TLD

+ = Sample Locations required by the Off-Site Dose Calculation Manual (ODCM)

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o (0

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m 0

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3 AP = Air Particulate (0

CF = Charcoal Filter

=-

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-~.1 STG = Vegetation 0 6WS = Sea Water 4ý-

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3 AL = Algae FH = Fish MU = Mussels 00 SE = Sediment WS = Sea Water a- HA = Lobster 0

m TM =Milk UO V

TF = Food Products WG = Well Water 90

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3 4* AL = Algae

"--4 FH = Fish 23 MU Mussels SE = Sediment WS = Sea Water

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0 V TF = Food Product 0

TG = Vegetation, Zn 0

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3.0 Summary of Radiological Environmental Data The following pages summarize the analytical results of the environmental samples, which were collected in 2007. Each environmental media category is presented as a separate subsection. A table that summarizes the data follows a discussion of the sampling requirements and results for each media type.

Listed at the top of each table are the units of measurement for each medium. The left-hand column contains the radionuclide which is being reported, total number of analyses of that radionuclide, and the number of measurements that exceed the required reporting level as documented in Table A.9.1-3 of the ODCM. The latter are classified as "non-routine" measurements. The next column lists the Lower Limit of Detection (LLD) for those radionuclides that have detection capability requirements specified in the ODCM.

Those sampling stations which are adjacent to the plant and which could conceivably be affected by the operation of Seabrook Station are called "Indicator" or "Zone 1" stations. Distant stations, which are beyond potential plant influences, are called "Control" or "Zone 2" stations. Direct radiation (TLD) monitoring locations are subdivided into site boundary, inner ring, and outer ring (emergency response) stations.

A set of statistical parameters is calculated for each radionuclide. This set of statistical parameters includes separate analyses for (1) the indicator stations, (2) the station having the highest annual mean concentration for that radionuclide, (3) and control stations. For each of these three groups of data, these parameters are as follows:

" The mean value of all concentrations.

" The range of values.

The number of positive measurements (a concentration which is greater than 3 times the standard deviation for that measurement) divided by the total number of measurements.

Each single radioactivity measurement in media datum in this report is based on a single measurement and is reported as a concentration plus or minus a one standard deviation uncertainty. The quoted uncertainty term represents only the random uncertainty associated with the radioactive decay process (counting statistics), and not the propagation of all possible uncertainties in the analytical procedure. contains the data for the samples collected in 2007. The results are organized by sample type, within each sample type listing the data are alphabetical by nuclide, and within each nuclide listing the data are chronologically arranged by end date (date of sample collection).

The radionuclide value concentrations have been corrected for radioactive decay to the end of the collection. The airborne radioiodine (charcoal) concentrations have been calculated assuming a constant flow rate and concentration throughout the collection period and corrected for decay while sampling as well as between sample collection termination and analysis.

3.1 Air Particulate Air monitoring stations were established at a total of eight locations, six locations required by the ODCM with two additional sites included to supplement the program. Seven of the locations are indicators; while the remaining one is a control station located more than 21 km away from the plant.

Airborne particulate (AP) is collected by passing the air through a glass-fiber filter. In 2007, these filters were collected bi-weekly and held for at least 100 hours0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months before being analyzed for gross-beta activity (indicated as GR-B in tables) to allow for the decay of radon daughter products. The change from a standard weekly to a biweekly filter change out cycle was implemented in 2005 for all air particulate stations as a result of equipment / procedure upgrades that were designed to reduce potential system down time due to equipment failure. Continuous automated and real-time remote monitoring of vital system parameters is performed with telemetry that detects power outage, pump failure, filter degradation, tubing failures and excessive filter loading. The telemetry communicates by cellular transmission to a web server that communicates to a shift technician's pager when set-point thresholds are reached, providing 24/7 alert notification. This capability provides for timely identification of problems and corrective actions that reduce the potential loss of air sampling. All eight sample stations used a biweekly filter change out cycle in 2007. For the year, 208 particulate filters were collected bi-weekly and analyzed for gross beta activity.

The 2007 gross beta activity analyses for the indicator locations was found to be statistically equivalent to that seen at the control station. The gross beta results are also similar to what was seen in the pre-operational program and for the last sixteen years of commercial operation. Only one filter sample (AP-01) showed a minor divergence from the trend of the other stations (approximately 50% increase in gross beta) for the sampling period ending in early July, but subsequently returned to the group trend. The total gross beta activity exhibited for this sample falls in the historical range of the normal fluctuations for this media type. It is also noted that no plant related radionuclides were identified in the filter composite sample that included this AP-01 sample. Other fluctuations seen in the gross beta activity throughout the year can be attributed to changes in the environment. Natural environmental processes such as wind direction, precipitation, snow cover, and soil temperature and moisture affect concentrations of naturally occurring radionuclides in the atmosphere directly above land.

No plant related gamma-emitting radionuclides were detected in any of the quarterly composite air filter samples analyzed. Therefore, no increasing or decreasing trends were observed. In 2007, naturally occurring Be-7 was the only nuclide detected. Be-7 is of cosmogenic origin. This is consistent with previous years both pre- and post-operationally.

The air particulate sampling program demonstrated no off-site dose to the public or impact to the environment, from this pathway, as the result of plant operations. This is consistent with previous years and the pre-operational program.

Air particulate sample collection and analysis deviations from the ODCM required program are described in Section 4. A total of five deviations were recorded for interruptions in continuous air sampler operation which were detected by telemetry. All five of the interruptions were the result of loss of supply line power to the units which were corrected when power was restored. Three of the interruptions were associated with blown pump fuses (two instances) or failed GFI outlets (one instance). Two interruptions were the result of power being removed temporarily to permit unrelated yard utility work to be performed safely.

FIGURE 3.1 GROSS-BETA MEASUREMENTS OF AIR PARTICULATE FILTERS SEABROOK STATION 0.08 0.08 0.07 0.07 0.06 0.06 0.05 0.05 E

' 0.04 0.04 C 0.03 0.03 0.02 0.02 0.01 0.01 0 FuAJAucr e 0 January February April June August October December 2007 0 AP-01 Barge Landing Area

AP-02 Hampton Marina

-+--AP-03 SW Boundary

-AP-04 W Boundary

-t&--AP-05 Winnacunnet High School

-*--AP-09 Georgetown (Control)

AP-07 PSNH Substation, Hampton

--- AP-08 Exeter & Hampton Electric Co.

FIGURE 3.1.1 GROSS-BETA MEASUREMENTS OF AIR PARTICULATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 0.16 0.16 Chernobyl May, 1986 0.14 0.14 0.12 0.12 a 0.1 0.1 a1)

E 0

Z 0.08 0.08 0 5% Criticality D.. 0.06 June, 1989 0.06 Full Power 0.04 May, 1990 0.04 0.02 r1 , AAA _ 0.02 0 '1 , ,. 0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-0'-AP-01 Barge Landing Area

-El--AP-02 Hampton Marina

--A--AP-03 SW Boundary

-x-- AP-06/09 Georgetown Substation (Control)

FIGURE 3.1.2 GROSS-BETA MEASUREMENTS OF AIR PARTICULATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 0.16 C

M 0.14 0.12 a). 0.1 a)

E C-) 0.08 0.06 0.04 0.02 0-1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-o--AP-04 W Boundary AP-05 Winnacunnet High School

-*-AP-06/09 Georgetown Substation (Control)

FIGURE 3.1.3 GROSS-BETA MEASUREMENTS OF AIR PARTICULATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 0.16 C

M 0.14 0.12 a) 0.1 L_

a1)

E 0.08 0.06 f 0.04 0.02 0-1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-c--AP-06/09 Georgetown Substation (Control)

AP-07 PSNH Substation, Hampton A AP-08 Exeter & Hampton Electric Co.

FIGURE 3.2 GROSS-BETA ON AIR PARTICULATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 0.08 0.08 0.06 0.06 1--

(D E

o 0.04 0.04 0

0.02 0.02 0 0 1994 1996 1998 2000 2002 2004 2006 2008 Indicators

....o Control Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Air Particulates (AP) UNITS: pCi/cubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected*) (No. Detected**) (No. Detected*-)

GR-B (208) 0.01 1.7E -2 1.8E -2 1.6E -2 (0) 6.7 - 30.6)E -3 9.5 - 30.6)E -3 ( 6.7 - 25.6)E -3 (182/182) (26/26) (26/26)

Be-7 (32) 1.2E -1 1.3E -1 1.1E -1 (0) 6.9- 15.7)E -2 1.3-1.4)E-1 7.2 - 16.3)E -2 (27/28) (4/4) (3/4)

K-40 (32) 1.3E -3 4.7E -3 -4.0E -4 (0) (-1.1 - 1.3)E-2 ( 1.4 - 8.7)E -3 (-9.8 - 9.0)E -3 (0/28) (0/4) (0/4)

Cr-51 (32) 4.6E -3 2.OE -2 -1.1E -2 (0) (-5.7 - 5.0)E -2 0.0 - 5.0)E -2 (-3.2 - 1.7)E -2 (0/28) (0/4) (0/4)

Mn-54 (32) 5.1E -5 3.4E -4 -1.OE -5 (0) (-8.2 - 13.3)E -4 (-7.6 - 13.3)E -4 (-3.3 - 3.9)E -4 (0/28) (0/4) (0/4)

Co-57 (32) 1.2E -5 i.0E -4 -2.8E -5 (0) (-5.6 - 5.6)E -4 (-3.3 - 3.0)E -4 (-4.7 - 2.6)E -4 (0/28) (0/4) (0/4)

Co-58 (32) 5.2E -5 9.3E -4 -9.8E -4 (0) (-1.2 - 2.8)E -3 3.7 - 23.0)E -4 (-1.4 - -0.3)E -3 (0/28) (0/4) (0/4)

Fe-59 (32) -6.9E -4 4.3E -4 -8.5E -4 (0) (-6.5 - 4.3)E -3 (-2.6 - 2.0)E -3 (-3.1 - 1.4)E -3 (0/28) (0/4) (0/4)

Co-60 (32) 7.5E -5 4.5E -4 5.OE -5 (0) (-6.6 - 10.7)E -4 ( 1.3 - 10.7)E -4 ( -7.2- 10.0)E -4 (0/28) (0/4) (0/4)

Zn-65 (32) -3.6E -4 6.7E -4 6.7E -4 (0) (-3.9 - 2.6)E -3 ( 0.0- 2.1)E-3 ( 0.0 - 2.1)E -3 (0/28) (0/4) (0/4)

Se-75 (32) 7.3E -5 5.7E -4 0.OE 0 (0) (-1.0 - 1.4)E -3 0.0 - 1.0)E -3 (-8.3 - 9.9)E -4 (0/28) (0/4) (0/4)

Zr-95 (32) 2.3E -5 1.2E -3 -1.3E -3 (0) (-3.6 - 3.4)E -3 6.0- 16.0)E -4 (-3.4 - 0.2)E -3 (0/28) (0/4) (0/4)

Ru-1 03 (32) 1.4E -4 2.4E -3 -4.8E -4 (0) ( -2.5 - 5.5)E -3 ( 1.4- 3.1)E-3 (-1.6 - 1.8)E -3 (0/28) (0/4) (0/4)

Ru-106 (32) -5.9E -4 6.1E -3 3.4E -3 (0) ( -1.5 - 1.3)E -2 3.0 - 12.7)E -3 ( 1.4 - 6.0)E -3 (0/28) (0/4) (0/4)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Air Particulates (AP) UNITS: pCi/cubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ag-1 08m (32) 1.iE -4 07 3.5E -4 -1.OE -5 (0) -6.9 - 9.9)E -4 ( 0.0 - 9.9)E -4 (-2.3 - 3.3)E -4 (0/28) (0/4) (0/4)

Ag-11 Om (32) -1.4E -4 07. 8.2E -4 1.6E -4 (0) (-3.2 - 1.8)E -3 ( -4.4 - 18.3)E -4 (-1.3 - 1.2)E -3 (0/28) (0/4) (0/4)

Sb-124 (32) 7.3E -4 02 2.2E -3 7.2E -4 (0) (-6.1 - 6.1)E -3 (-9.6 - 44.0)E -4 (-9.0 - 38.0)E -4 (0/28) (0/4) (0/4)

Sb-125 (32) 3.1E -4 03 1.3E -3 1.8E -4 (0) (-2.0 - 2.5)E -3 ( 7.0 - 20.0)E -4 (-7.4 - 10.6)E -4 (0/28) (0/4) (0/4) 1-131 (32) -2.4E -2 04 5.2E -2 -1.8E -2 (0) ( -4.9 - 3.4)E -1 (-7.4 - 34.0)E -2 (-6.7 - 3.4)E -2 (0/28) (0/4) (0/4)

Cs-1 34 (32) 0.05 -8.3E -5 05 4.8E -4 4 ,4E -4 ,-

(0) (-1.4 - 1.0)E-3 (-5.1 - 10.4)E -4 (-6.0 - 16.2)E -4 (0/28) (0/4) (0/4)

Cs-137 (32) 0.06 6.6E -5 09 3.OE -4 3.OE -4 (0) (-1.1 - 0.8)E -3 (-9.0- 120.0)E -5 (-9.0 - 120.0)E -5 (0/28) (0/4) (0/4)

Ba-140 (32) 2.3E -3 02 1.3E -2 7.3E -3 (0) (-2.4 - 3.4)E -2 ( 1.0- 1.7)E-2 (-1.8- 3.1)E -2 (0/28) (0/4) (0/4)

Ce-141 (32) -6.9E -4 01 1.5E -3 4.5E -4 (0) (-7.1 - 5.4)E -3 (-9.0 - 54.0)E -4 (-3.3 - 1.9)E -3:

(0/28) (0O4) (0/4)

Ce-144 (32) 5.8E -4 05 2.4E -3 -1.2E -3 (0) (-2.1 - 6.9)E -3 ( -6.0 - 69.0)E -4 (-3.6 - 1.0)E -3 (0/28) (0/4) (0/4)

Th-232 (32) -8.4E -5 01 8.3E -4 7.2E -4 (0) (-3.7 - 4.6)E -3 ( -1.8 - 2.9)E -3 (-1.6 - 2.6)E -3 (0/28) (0/4) (0/4)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.2 Charcoal Filters Charcoal filter (CF) cartridges are in series with the air particulate glass-fiber filters. Monitoring stations were established at a total of eight locations. Seven of these are indicators and one is a control. Charcoal filters from the air sampling stations were collected and analyzed for 1-131 activity to a lower limit of detection (LLD) of 0.07 pCi/m 3 .

During 2007, a total of 208 charcoal cartridges from eight locations were analyzed. As described for the air particulate samplers (see Section 3.1), the collection cycles for the charcoal filters was biweekly during 2007. At the time of switching from a one week to a two week change-out cycle in 2005, an iodine decay analysis compared a 1-week vs. 2-week air sampling collection times to the sensitivity to detect iodine-131. For the assumption of chronic air concentrations of 1-131, the longer collection time results in a higher total deposition of 1-131 that remains on the cartridge at counting time and, therefore, an MDA (Minimum Detectable Activity) equal to or better than the 1-week cycle. For potential short duration releases of 1-131, a modest increase in sampler flow rate (to approximately 1.8 SCFM) provides for a higher iodine collection factor per unit time. This higher collection factor compensates for the decay losses due to the longer turn-around time with a 2-week change-out cycle such that the effective detection capability remains about the same.

No sample analysis indicated a detectable measurement for 1-131 that was statistically relevant (positive) at the air sampling locations stated in the ODCM.

The REMP program has detected no radio-iodine at any offsite air sample location since Seabrook Station's initial criticality of June 1989. The pre-operational data for 1-131 are consistent with present data.

The estimated organ doses from iodine in gaseous effluents are well below the 10CFR50, Appendix I dose criteria for the reporting period. Therefore, no increasing or decreasing trends were observed.

Charcoal filter sample collection and analysis deviations from the ODCM required program, if any, are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Charcoal Cartridge (CF) UNITS: pCilcubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected-*) (No. Detected*) (No. Detected**)

1-131 (208) 0.07 -2.5E -4 01 1.7E -3 1.2E -4 (0) (-2.1- 1.6)E-2 (-9.4 - 15.5)E -3 (-5.8- 9.1)E -3 (0/186) (0/26) (0/26)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.3 Milk Milk samples (TM) were collected semi-monthly during the pasture season and monthly at other times.

Samples are analyzed for low level 1-131 and gamma-emitting radionuclides.

The ODCM (Table A.9. 1-1) requires that milk samples be collected from three locations within 5 km of the plant having the highest dose potential. If there are none, then one sample from milking animals in each of three areas between 5 to 8 km distance where the doses are calculated to be greater than 1 mrem/yr. In March, 2007, a milk sample from station TM-23 could not be collected as scheduled. The owner reported that he has sold the milk producing cows and will no longer be supplying milk for the REMP. Due to the limited inventory of milk animals in the site area, as reconfirmed by the 2007 Land Use Census, no suitable substitute location was available to replace the lost sample site maintaining the number of available sample locations to less than the number required by the ODCM sampling program (no available milk within 5 km, and only two milk locations between 5 and 8 km). The ODCM allows for broad leaf vegetation samples to be collected if milk sampling is not performed in accordance to the REMP requirements. As a result, two site boundary and one control vegetation collection locations are sampled to compensate for the limited milk sampling (see Section 3.12).

The Land Use Census also identified a milk (goat) location situated 8.1 Km, NW, just beyond the ODCM required 8.0 Km maximum distance for indicator milk sampling sites. This location (designated TM-24) also has limited number of milking animals and has indicated that it could not provide a reliable source of milk throughout the year. Samples were collected for approximately 6 months in 2007 while milk supplies were available. Due to the distance and limited availability of milk, TM-24 does not qualify as an ODCM defined indicator sampling site.

A total of 66 milk samples were collected during the year from available locations. Each sample was analyzed for gamma emitting radionuclides. In addition, all samples were evaluated for 1-131 through an iodine extraction process. With one exception, the gamma analyses indicated that only natural occurring potassium-40 was detectable in milk. One detectable concentration of Cs-137 was measured in a milk sample collected in 2007. The positive Cs-1 37 measurement was just above the average analysis minimum detectable activity (MDC) value of 7.4 pCi/kg. The location where the sample was taken is approximately 6.9 Km, NW from the plant. No other terrestrial samples collected in the site area found cesium, nor was any significant Cs-1 37 reported in plant effluents during the time period of interest.

Figure 3.4.1 illustrates the Cs-1 37 analysis from previous years, including periods prior to plant operations.

Past detection of Cs-1 37 is attributed to atmospheric nuclear weapons testing that persist in the environment based on similar measurements during the pre-operational period of the REMP. Figures 3.3, 3.3.1, 3.4, and 3.4.1 illustrate the analysis results for Cs-1 37 in milk over the current year (2007) and previous years of the Seabrook REMP.

Potassium-40 was detected in all but one indicator locations, and from the control locations. Potassium-40 is a naturally occurring nuclide detected in many environmental sample media.

Iodine-131 was not positively identified at any location for the year. The samples met the Lower Limit of Detection (LLD) requirements (1 pCi/kg) for 1-131 in milk. This is consistent with previous years for both the pre-operational and operational phases of the program. No increasing or decreasing trends in the radioactivity content of milk were observed.

Since there was no detected radioactivity in milk that could be identified to be related to plant releases to the environment, there was no plant associated dose impact for members of the public due to the milk ingestion pathway. The postulated maximum organ dose associated with Cs-137 in milk from past weapons testing fallout is conservatively estimated to be only 0.79 mrem/year (infant liver) assuming that the entire years' intake was at an equivalent Cs-137 concentration equal to the minimum detectable activity (MDA) level achieved by the laboratory analysis for 17 samples (7.4 pCi/kg) plus the one positive sample (10.9 pCi/kg) collected for the year. The MDA does not imply that Cs-1 37 was actually present in the milk samples, only that testing could not detect any positive activity down to that limit of the measurement system.

Milk sample collection and analysis deviations (if any) from the ODCM required program are described in Section 4.

FIGURE 3.3 CESIUM-137 IN MILK SEABROOK STATION 30 25 20 15 0) 10 C-)

5

-5

-10 Jan Feb Mar Apr May . Jun Jul Aug Sep Oct Nov Dec 2007

-W-TM-09 Dairy Farm, Hampton NH

--- TM-15 Goat Herd, Hampton Falls NH

-X-TM-20 Dairy Farm, Rowley MA (Control)

--- TM-23 Sunshine Dairy Farm, Newbury, MA

-*--TM-24 Joy Lane, North Hampton, NH FIGURE 3.3.1 CESIUM-137 IN MILK ANNUAL AVERAGE CONCENTRATIONS 30 50 25 40 20 30 15 C1 20 10 10 5

0 i 0 lb gl Zý1, (Z5b 'A

'ob %A q Ncb Noi Ncb Ncb Ncb 'ýb Ncbl 41 Ncb1 Nc§ Ncb 'v 'f 43 'P

-TM-04 Dairy Farm, Salisbury MA

TM-08 (prior to 1995 TM-10) Dairy Farm, Hampton Falls NH

-o--TM-09 Dairy Farm, Hampton NH A TM-15 Goat Herd, Hampton Falls NH FIGURE 3.4 CESIUM -137 IN MILK SEABROOK STATION 30 25-20-15 0

10 -

5-0-

-5 I I I I I Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2007

-*TM-20 Dairy Farm, Rowley MA (Control)

-*--TM-23 Sunshine Dairy Farm, Newbury, MA FIGURE 3.4.1 CESIUM-137 IN MILK ANNUAL AVERAGE CONCENTRATIONS 30 25 20 5% Criticality U 15 Chernobyl June, 1989 C- May, 1986 10 -1 Full Power May, 1990 5- A\

01-- I~ I- I' t- -

p,0§ (ý ý ý

---O-TM-16 Goat Herd, Kensington NH A-TM-21 Dairy Farm, N. Andover MA (Control)

-X-- TM-23 Sunshine Dairy Farm, Newbury, MA

-El- TM-20 Dairy Farm, Rowley MA (Control)

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Milk (TM) UNITS: pCi/kcq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Be-7 (66) 2.2E 0 6.6E 0 -7.52 0 (0) (-4.0 - 4.7)E 1 (-2.1 - 4.7)E 1 (-4.5 - 3.3)E 1 (0/48) (0/18) (0/18)

K-40 (66) 1.5E 3 1.62 3 1.3E 3 (0) (-3.1 - 18.6)E 2 6.4 - 18.6)E 2 (1.2-1.5)E3 (47/48) (10/10) (18/18)

Cr-51 (66) 3.22 0 1.1E 1 -7.9E 0 (0) (-6.0 - 5.5)E 1 7.0 - 14.0)E 0 (-4.0 - 1.9)E 1 (0/48) (0/2) (0/18)

Mn-54 (66) -3.3E -1 2.62 -1 2.62 -1 (0) ( -3.5 - 3.6)E 0 (-4.1 - 4.6)E 0 (-4.1 - 4.6)E 0 (0/48) (0/18) (0/18)

Co-57 (66) -8.6E -2 2.OE 0 8.6E -1 (0) (-4.0 - 3.5)E 0 (1.1 - 2.9)E 0 (-3.0 - 24.0)2 -1 (0/48) (0/2) (0/18)

Co-58 (66) -4.2E -2 2.1E -1 2.1E -1 (0) -5.1 - 5.2)E 0 (-3.3- 3.0)E 0 (-3.3 - 3.0)E 0 (0/48) (0/18) (0/18)

Fe-59 (66) 1.1E0 2.1E 0 -1.6E -1 (0) (-1.2 - 1.1)E 1 (-6.5 - 11.2)E 0 (-1.5 - 1.0)E 1 (0/48) (0/18) (0/18)

Co-60 (66) -1.3E -1 1.4E -1 -2.5E -1 (0) -5.7 - 5.8)E 0 -4.4 - 3.5)E 0 -4.4 - 4.5)E 0 (0/48) (0/10) (0/18)

Zn-65 (66) -2.5E 0 -1.9E 0 -5.0E 0 (0) -1.7 - 1.3)E 1 (-1.1 - 1.3)E 1 (-1.8 - 0.4)E 1 (0/48) (0/18) (0/18)

Se-75 (66) -2.02 -1 9.5E -1 -5.3E -1 (0) -4.3 - 5.6)E 0 4.0 - 15.0)E -1 -5.3 - 2.3)E 0 (0/48) (0/2) (0/18)

Zr-95 (66) -1.3E -1 2.72 0 -2.22 0 (0) (-9.6 - 10.1)E 0 (-2.1 - 7.5)E 0 -9.6 - 2.8)E 0 (0/48) (0/2) (0/18)

Ru-1 03 (66) -1.1E 0 -5.52 -1 -2.5E 0 (0) (-7.9 - 7.0)E 0 -2.8 - 1.7)E 0 (-6.4 - 0.8)E 0 (0/48) (0/2) (0/18)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Milk (TM) UNITS: poCilka Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ru-1 06 (66) 2.1E 0 4.4E 0 1.6E 0 (0) (-4.0 - 3.9)E 1 (-2.6 - 2.2)E 1 (-3.4 - 3.0)E 1 (0/48) (0/18) (0/18)

Ag-108m (66) 4.6E -2 1.9E -1 -5.1E -2 (0) (-4.0 - 6.4)E 0 (-4.0 - 3.8)E 0 (-3.3 - 3.7)E 0 (0/48) (0/18) (0/18)

Ag-110m (66) -7.2E -1 9.4E -2 9.4E -2 (0) ( -6.2 - 5.3)E 0 (-7.6 - 6.7)E 0 (-7.6 - 6.7)E 0 (0/48) (0/18) (0/18)

Sb-124 (66) -1.OE 0 1.8E -1 -2.1E 0 (0) (-1.5- 1.6)E 1 (-1.1 - 1.6)E 1 (-1.0- 1.0)E 1 (0/48) (0/18) (0/18)

Sb-125 (66) -8.3E -1 4.7E -1 -1.OE -1 (0) (-8.7 - 13.9)E 0 ( -8.7- 13.9)E 0 (-9.3 - 8.1)E 0 (0/48) (0/18) (0/18) 1-131 (66) 5.1E -2 7.7E -2 7.7E -2 (0) (-1.7 - 4.5)E -1 ( -1.4 - 4.9)E -1 ( -1.4 - 4.9)E -1 (0/48) (0/18) (0/18) 15 Cs- 134 (66) 4.6E -2 4.6E -1 4.6E -1 (0) (-5.1 - 4.7)E 0 ( -4.0 - 4.8)E 0 (-4.0 - 4.8)E 0 (0/48) (0/18) (0/18)

Cs-1 37 (66) 18 1.OE 0 2.2E 0 8.4E -1 (0) (-3.6 - 10.9)E 0 ( -1.1 - 5.4)E 0 (-3.5 - 5.3)E 0 (1/48) (0/1 O) (0/18)

Ba-140 (66) 15 -2.7E -1 2.4E 0 1.4E 0 (0) (-5.5 - 7.0)E 0 ( 7.0-41.0)E-1 (-4.6 - 9.8)E 0 (0/48) (0/2) (0/18)

Ce-141 (66) -1.OE 0 -6.OE -1 -9.1E -1 (0) (-9.8 - 4.9)E 0 ( -5.1 - 4.8)E 0 ( -1.3 - 0.8)E 1 (0/48) (0/18) (0/18)

Ce-144 (66) -3.5E 0 4.OE 0 4.OE 0 (0) (-2.6- 1.3)E 1 ( -7.0 - 24.0)E 0 (-7.0 - 24.0)E 0 (0/48) (0/18) (0/18)

Th-232 (66) 1.3E 0 3.7E 0 3.OE 0 (0) (-1.7- 1.7)E 1 1.5- 5.9)E 0 (-2.2- 1.8)E 1 (0/48) (0/2) (0/18)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.4 Surface Water Surface water (seawater - WS) grab samples are required at two locations (control and indicator) monthly.

The indicator (WS-01) is over the vicinity of the plant's submerged discharge structure. The control location (WS-51) is situated in Ipswich Bay, MA, approximately 16.9 Km from the plant. A gamma analysis is performed on each sample. A tritium analysis is performed on the quarterly composite of samples from each location. Additional samples were collected from the Seabrook marsh (WS-02) which borders the immediate plant property. These samples are intended to provide indication of any ground water movement across the site area that might carry contamination into the surface waters of the marsh.

For the 2007, 26-gamma analyses were performed on surface water samples. The only radionuclide detected in 2007 was naturally occurring K-40. No plant related nuclides were detected. The present data for gamma emitters in seawater is consistent with that of the pre-operational program and previous years of operations. Therefore, no increasing or decreasing trends were observed.

Quarterly composites from the same gamma collection samples were analyzed for tritium. Ten samples were analyzed in 2007, which included two collections from a non-ODCM required location (WS-02) situated approximately 600 feet SSE from the Containment Building in Seabrook Marsh. The monthly composites and WS-02 samples showed no presence of tritium. All samples met the required LLD (3000 pCi/kg) for tritium in seawater. These results are consistent with pre-operational tritium data.

The calculated dose, as the result of plant effluents is not evaluated due to the fact that no plant related radionuclides were or have been detected. Therefore, no increasing or decreasing trends in dose were observed. This sampling program demonstrates that there is no impact to the public or environment, through this pathway, from plant operations.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Sea Water (WS) UNITS: pCi/kcq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected") (No. Detected**)

H-3 (10) 3000 -1.1E 2 -8.5E 1 -2.3E 2 (0) (-8.5 - 5.0)E 2 (-8.5 - 5.0)E 2 (-1.0 - 0.4)E 3 (0/6) (0/4) (0/4)

Be-7 (26) 3.4E -1 7.5E 0 2.8E 0 (0) -3.3 - 2.9)E 1 ( 1.9- 13.0)E 0 (-1.6- 2.1)E 1 (0/14) (0/2) (0/12)

K-40 (26) 2.7E 2 2.8E 2 2.8E 2 (0) 1.2 - 3.6)E 2 ( 2.0 - 3.6)E 2 ( 2.1 - 3.4)E 2 (14/14) (12/12) (12/12)

Cr-51 (26) 4.2E 0 1.5E 1 -4.2E 0 (0) -2.9 - 3.3)E 1 9.0 - 20.0)E 0 (-2.4 - 3.1)E 1 (0/14) (0/2) (0/12)

Mn-54 (26) 15 -6.1E -1 -4.6E -1 -5.9E -1 (0) -3.2 - 2.5)E 0 (-3.0 - 2.5)E 0 (-3.5 - 2.0)E 0 (0/14) (0/12) (0/12)

Co-57 (26) 7.9E -1 1.OE 0 -8.1 E -2 (0) (-3.0 - 23.0)E -1 (-3.0 - 23.0)E -1 (-2.5 - 1.9)E 0

. (0/14) (0/2) (0/12)

Co-58 (26) 15 -8.3E -1 -6.8E -1 -1.9E 0 (0) -2.7 - 1.1)E 0 (-2.5- 1.1)E 0 (-4.4 - 0.9)E 0 (0/14) (0/12) (0/12)

Fe-59 (26) 30 -1.8E 0 5.6E 0 -8.9E -1 (0) (-6.3 - 6.2)E 0 ( 5.0 - 6.2)E 0 (-7.5 - 3.0)E 0 (0/14) (0/2) (0/12)

Co-60 (26) 15 -1.3E -1 1.9E -1 4.2E -2 (0) (-2.9 - 2.5)E 0 (-2.1 - 2.5)E 0 (-2.8 - 1.4)E 0 (0/14) (0/2) (0/12)

Zn-65 (26) 30 -8.2E -1 -2.3E -1 -2.6E 0.

(0) (-9.3 - 20.1)E 0 (-9.3 - 20.1)E 0 (-8.6 - 6.2)E 0 (0/14) (0/12) (0/12)

Se-75 (26) 7.7E -2 1.7E 0 3.8E -2 (0) (-3.0 - 4.1)E 0 (-6.0 - 41.0)E -1 (-3.0- 2.1)E 0 (0/14) (0/2) (0/12)

Zr-95 (26) 15 7.3E -1 8.5E -1 -9.4E -1 (0) (-3.5 - 3.5)E 0 (-4.0 - 21.0)E -1 (-4.7 - 4.0)E 0 (0/14) (0/2) (0/12)

Ru-103 (26) -8.1E -1 -4.0E -1 -1.4E 0 (0) (-4.1 - 2.5)E 0 (-6.0 - -2.0)E -1 (-5.9 - 0.7)E 0 (0/14) (0/2) (0/12)

Ru-1 06 (26) -4.8E 0 -4.OE -1 -4.OE -1 (0) (-2.4 - 2.1)E 1 -1.5 - 0.8)E 1 (-1.5 - 0.8)E 1 (0/14) (0/12) (0/12)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Sea Water (WS) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ag-1 08m (26) 1.OE -1 7.OE -1 7.OE -1 (0) -2.1 - 1.7)E 0 (-1.5 - 3.7)E 0 (-1.5- 3.7)E 0 (0/14) (0/12) (0/12)

Ag-11Orn (26) -5.1E -1 -5.OE -2 -iE -1 (0) (-6.8 - 3.4)E 0 (-6.0 - 5.0)E -1 (-3.1 - 2.8)E 0 (0/14) (0/2) (0/12)

Sb-124 (26) -9.2E -1 -3.8E -1 -2.1E 0 (0) (-9.9- 3.1)E 0 (-9.9 - 3.1)E 0 (-8.4 - 1.8)E 0 (0/14) (0/12) (0/12)

Sb-125 (26) 4.7E -1 8.OE -1 -1.OE 0 (0) (-4.5 - 7.4)E 0 (-4.5 - 7.4)E 0 (-1.2 - 0.6)E 1 (0/14) (0/12) (0/12) 1-131 (26) 15 -2.3E -1 8.3E -2 -3.8E -1 (0) (-7.8 - 6.3)E 0 (-7.8 - 6.3)E 0 (-4.5- 3.1)E 0 (0/14) (0/12) (0/12)

Cs-134 (26) 15 6.6E -2 9.8E -1 9.8E -1 (0) (-2.6 - 1.9)E 0 (-1.2 - 5.5)E 0 (-1.2 - 5.5)E 0 (0/14) (0/12) (0/12)

Cs-1 37 (26) 18 2.8E -1 2.5E 0 5.7E -1 (0) (-3.9 - 4.3)E 0 ( 1.5- 3.4)E 0 (-1.9- 4.5)E 0 (0/14) (0/2) (0/12)

Ba-140 (26) 15 -1.6E -1 3.5E -1 1.8E -1 (0) (-4.3 - 2.7)E 0 (-6.0 - 13.0)E -1 ( -6.0 - 5.9)E 0 (0/14) (0/2) (0/12)

Ce-141 (26) -1.OE 0 -7.5E -1 -1.6E 0 (0) (-6.4 - 3.8)E 0 (-2.5- 1.0)E 0 ( -9.8 - 4.2)E 0 (0/14) (0/2) (0/12)

Ce-144 (26) -5.3E -1 -4.9E -1 -2.1E 0 (0) (-1.9 - 1.4)E 1 (-1.9- 1.4)E 1 (-1.6 - 0.9)E 1 (0/14) (0/12) (0/12)

Th-232 (26) 2.5E 0 3.OE 0 -1.1E 0 (0) (-4.0 - 12.8)E 0 (-4.0 - 12.8)E 0 (-9.7 - 11.8)E 0 (0/14) (0/12) (0/12)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.5 Ground Water There is no requirement in the ODCM to collect ground water (WG) samples. For the year, four quarterly ground water samples were collected from three locations. These samples were collected from the drinking water line (WG-01) supplied to the Site (by the Town of Seabrook), from an inactive well (WG-13) located approximately 1 km north of the plant, and a well 1.3 Km NNW (WG-14). All samples were analyzed for gross-beta activity, gamma-emitters and tritium.

Gross beta activity detected in all twelve samples taken is due to naturally occurring radium and its daughter products. The gross beta activity seen at both locations is similar to what was seen in the pre-operational program and is consistent with results from previous years of commercial operations. Figures 3.5 and 3.5.1 indicate the current year (2007) and the long-term measurement history for gross beta in well waters. No tritium or gamma emitters were detected.

The calculated dose is not evaluated due to the fact that plant related radionuclides have not been detected. Therefore no increasing or decreasing trends were observed. There is no impact to the public, through this pathway, from plant operations.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

FIGURE 3.5 GROSS-BETA MEASUREMENTS OF GROUND WATER SEABROOK STATION 20 20 18 - 18 16 16 14 14 12 12 C- 10 10 8 8 6- -6 4- -4 2 -2 0 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2007

--- WG-01 Seabrook Town Wells

-&WG-14 Brimmer's Lane

WG-13 Seabrook Station Well No. 13 FIGURE 3.5.1 GROSS-BETA MEASUREMENTS OF GROUND WATER SEMI-ANNUAL AVERAGES SEABROOK STATION 20 20 15 15 10 10 CL, 5 5 0 .k I I I I I I 0 bA C9 qz, ý b e Qý0Jb A C5 q0 (Z R~b Ix D 1)A (

-X-WG-01 Seabrook Town Wells A WG-14 Brimmer's Lane

-- WG-13 Seabrook Station Well No. 13 Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Ground Water (WG) UNITS: pCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected-)

GR-B (12) 4 6.9E 0 13 7.2E 0 NO DATA (0) 4.4 - 9.8)E 0 4.4 - 9.8)E 0 (12/12) (4/4)

H-3 (12) 3000 -5.3E 1 01 1.0E 2 NO DATA (0) (-8.2 - 7.8)E 2 (-4.6 - 6.3)E 2 (0/12) (0/4)

Be-7 (12) -1.1E 1 14 -1.OE 0 NO DATA (0) (-3.4 - 2.8)E 1 (-1.4- 2.8)E 1 (0/12) (0/4)

K-40 (12) 2.7E 0 01 2.9E 1 NO DATA (0) (-5.4 - 6.4)E 1 (-8.0 - 64.0)E 0 (0/12) (0/4)

Cr-51 (12) -3.8E 0 13 1.OE 0 NO DATA (0) (-2.3 - 3.0)E 1 (-1.9 - 3.0)E 1 (0/12) (0/4)

Mn-54 (12) 15 -1.3E 0 01 -9.3E -1 NO DATA (0) -4.2 - 2.3)E 0 (-4.2 - 2.3)E 0 (0/12) (0/4)

Co-57 (12) -1.2E -1 01 5.OE -2 NO DATA (0) (-1.4 - 1.0)E 0 (-8.0 - 10.0)E -1 (0/12) (0/4)

Co-58 (12) 15 -1.6E 0 01 -1.8E -1 NO DATA (0) -7.2 - 1.9)E 0 (-2.2- 1.9)E 0 (0/12) (0/4)

Fe-59 (12) 30 6.8E -1 14 1,9E 0 NO DATA (0) -7.1 - 5.4)E 0 (-1.7- 5.4)E 0 (0/12) (0/4)

Co-60 (12) 15 8.3E -3 13 1.7E 0 NO DATA (0) -2.6 - 3.1)E 0 (-6.0 - 31.0)E -1 (0/12) (0/4)

Zn-65 (12) 30 3.2E 0 13 7.7E 0 NO DATA (0) (-9.0 - 21.0)E 0 (-6.9 - 15.7)E 0 (0/12) (0/4)

Se-75 (12) 5.5E -1 13 9.7E -1 NO DATA (0) -3.0 - 4.0)E 0 (-3.0 - 3.1)E 0 (0/12) (0/4)

Zr-95 (12) 15 0.OE 0 13 1.2E 0 NO DATA (0) (-4.8 - 5.8)E 0 0.0- 2.5)E 0 (0/12) (0/4)

Ru-103 (12) -1.1E 0 13 1.OE 0 NO DATA (0) (-3.9 - 5.0)E 0 (-1.3 - 5.0)E 0 (0/12) (0/4)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Ground Water (WGI UNITS: oCi/liter Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ru-106 (12) -1.5E 0 01 2.8E 0 NO DATA (0) (-1.3- 1.7)E 1 (-1.0 - 1.7)E 1 (0/12) (0/4)

Ag-108m (12) -3.1E -1 13 0.OE 0 NO DATA (0) (-2.4 - 1.4)E 0 (-1.6 - 0.7)E 0 (0/12) (0/4)

Ag-110m (12) -6.6E -1 13 5.OE -1 NO DATA (0) (-5.0 - 3.4)E 0 (-6.0 - 34.0)E -1 (0/12) (0/4)

Sb-124 (12) -2.1E -1 01 1.5E 0 NO DATA (0) (-8.6 - 8.4)E 0 ( -4.9 - 8.4)E 0 (0/12) (0/4)

Sb-125 (12) 2.6E -1 14 1.7E 0 NO DATA (0) (-3.6 - 5.8)E 0 ( -2.5 - 4.8)E 0 (0/12) (0/4) 1-131 (12) 15 -2.6E -1 01 2.7E 0 NO DATA (0) (-8.9 - 7.2)E 0 ( -2.8 - 5.5)E 0 (0/12) (0/4)

Cs-134 (12) 15 4.8E -1 01 8.OE -1 NO DATA (0) (-2.1 - 4.8)E 0 (-2.1 - 4.8)E 0 (0/12) (0/4)

Cs-137 (12) 18 -1.6E 0 01 -1.4E 0 NO DATA (0) (-3.8 - 1.3)E 0 (-2.4- 1.3)E 0 (0/12) (0/4)

Ba-140 (12) 15 7.2E -1 14 2.5E 0 NO DATA (0) (-5.5 - 6.4)E 0 (-1.8 - 6.4)E 0 (0/12) (0/4)

Ce-141 (12) 2.4E -1 01 2.6E 0 NO DATA (0) (-9.6 - 6.4)E 0 (-5.0 - 64.0)E -1 (0/12) (0/4)

Ce-144 (12) -2.9E 0 13 2.3E 0 NO DATA (0) (-1.5 - 1.7)E 1 (-1.5 - 1.7)E 1 (0/12) (0/4)

Th-232 (12) 2.7E -1 01 3.9E 0 NO DATA (0) (-1.1 - 0.7)E 1 ( 6.0 - 73.0)E -1 (0/12) (0/4)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.6 Sediment Semiannual sediment sampling is required at one indicator location, although a total of five locations, three indicators and two controls, are collected. The indicator stations are comprised of two beach sediment cores from Hampton Beach (SE-07) and Seabrook Beach (SE-08), plus one sub tidal sediment core taken from near the discharge structure (SE-02). The control locations, both beach (SE-57) and sub tidal (SE-52), are located within Ipswich Harbor. A total of 30 samples were collected for the year from all locations. Each sediment core was sectioned into 5-centimeter segments. Segment 1 extends from the top of the core to 5 centimeters, segment two extends from 5 to 10 centimeters and the third segment extends from 10 to 15 centimeters in depth. A gamma analysis was performed on each segment.

The only radionuclides detected in 2007 were naturally occurring K-40 and Th-232 with its natural daughters. Potassium-40 was detected in all but one segment from the core samples collected.

Thorium-232 (as measured in the gamma isotopic analysis as AcTh-228) and its daughters were also present in 17 of the 30 core segment samples. No plant related radionuclides were detected in any segment. No increasing or decreasing trends were observed. This is consistent with the pre-operational program and with previous years of plant operations. There is no dose to the public or impact to the environment from any pathways associated with this media.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Sediment (SE) UNITS: pCi/kD Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (No n-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Be-7 (30) -5.3E 1 52 4.5E 1 3.8E 1 (0) -3.3 - 1.8)E 2 (-1.4 - 2.2)E 2 (-1.4 - 2.2)E 2 (0/18) (0/6) (0/12)

K-40 (30) 1.6E 4 08 2.OE 4 I.4E 4 (0) 9.0 - 2178.0)E 1 1.7 - 2.2)E 4 1.2- 1.8)E 4 (17/18) (6/6) (12/12)

Cr-51 (30) -4.OE 1 52 5.3E 1 -2.5E 0 (0) (-4.6 - 4.0)E 2 (-1.6 - 2.6)E 2 (-3.7 - 3.8)E 2 (0/18) (0/6) (0/12)

Mn-54 (30) 4.5E 0 02 1.6E 1 6.OE 0 (0) -4.0 - 5.6)E 1 (-5.6 - 56.0)E 0 (-3.9 - 4.4)E 1 (0/18) (0/6) (0/12)

Co-57 (30) 4.OE 0 07 5.OE 0 1.6E 0 (0) (-1.7 - 2.6)E 1 (-8.0 - 26.0)E 0 (-2.3 - 2.1)E 1 (0/18) (0/6) (0/12)

Co-58 (30) -3.6E 0 57 -6.7E -1 -9.3E 0 (0) -4.8 - 3.3)E 1 (-1.6- 2.1)E 1 (-4.8 - 2.1)E 1 (0/18) (0/6) (0/12)

Fe-59 (30) 1.0E 1 07 1.5E 1 -1.5E 1 (0) (-1.1 - 1.6)E 2 ( -1.1 - 0.9)E 2 (-8.6 - 5.3)E 1 (0/18) (0/6) (0/12)

Co-60 (30) -5.4E 0 57 4.8E 0 2.3E 0 (0) (-5.0 - 2.6)E 1 (-8.0 - 14.0)E 0 ( -2.6 - 3.1)E 1 (0/18) (0/6) (0/12)

Zn-65 (30) -4.8E 1 52 1.9E 1 -2.8E 0 (0) ( -1.7 - 0.8)E 2 ( -8.1 - 11.9)E 1 (-1.5- 1.2)E 2 (0/18) (0/6) (0/12)

Se-75 (30) -5.6E 0 02 1.OE 0 -2.3E 0 (0) ( -5.8 - 5.5)E 1 ( -3.3 - 5.5)E 1 (-5.8 - 1.8)E 1 (0/18) (0/6) (0/12)

Zr-95 (30) -1.3E 0 02 2.OE 1 -7.3E 0 (0) (-1.1 - 0.7)E 2 ( -3.6 - 7.2) E 1 ( -6.8 - 8.7)E 1 (0/18) (0/6) (0/12)

Ru-1 03 (30) 6.4E 0 02 1.4E 1 9.OE 0 (0) (-2.1 - 6.6)E 1 ( -1.7 - 4.0)E 1 ( -4.9 - 6.2)E 1 (0/18) (0/6) (0/12)

Ru-1 06 (30) -3.7E 1 52 5.7E 1 3.3E 1 (0) (-3.1 - 2.5)E 2 ( -2.1 - 3.3)E 2 (-2.1 - 3.3)E 2 (0/18) (0/6) (0/12)

Ag-1 08m (30) 3.OE 0 08 9.5E 0 -6.3E 0 (0) (-2.8 - 2.3)E 1 ( 5.0- 17.1)E 0 (-4.1 - 1.5)E 1 (0/18) (0/6) (0/12)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Sediment (SE) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ag-110m (30) 2.2E 0 02 2.7E 0 -2.3E 0 (0) (-4.1 - 4.7)E 1 ( -3.4 - 4.7)E 1 (-2.0 - 2.0)E 1 (0/18) (0/6) (0/12)

Sb-124 (30) -1.3E 0 57 1.5E 1 -1.0E 1 (0) (-7.1 - 5.8)E 1 (-2.5 - 6.3)E 1 (-7.8 - 6.3)E 1 (0/18) (0/6) (0/12)

Sb-125 (30) 1.1E 1 08 2.7E 1 -4.OE 0 (0) (-4.3- 10.1)E 1 (-1.6- 10.1)E 1 (-5.1 - 6.3)E 1 (0/18) (0/6) (0/12) 1-131 (30) -3.6E 1 57 1.7E 1 -1.8E 1 (0) (-1.5 - 0.8)E 2 (-1.3 - 2.2)E 2 (-1.9 - 2.2)E 2 (0/18) (0/6) (0/12)

Cs-1 34 (30) 150 -2.4E 0 52 1.7E 1 1.2E 1 (0) -4.8 - 3.9)E 1 (-6.0 - 57.0)E 0 (-9.0 - 57.0)E 0 (0/18) (0/6) (0/12)

Cs-1 37 (30) 180 -8.1E 0 07 -8.3E -1 -9.5E 0 (0) -4.9 - 1.8)E 1 (-2.6 - 1.8)E 1 (-3.7 - 3.4)E 1 (0/18) (0/6) (0/12)

Ba-140 (30) 3.8E 1 02 9.7E 1 -3.7E 0 (0) -4.8 - 6.3)E 2 -2.2 - 6.3)E 2 (-2.1 - 3.3)E 2 (0/18) (0/6) (0/12)

Ce-141 (30) -1.2E 1 52 3.4E 1 1.8E I (0) (-8.1 - 3.7)E 1 (-1.0 - 8.9)E 1 (-4.9 - 8.9)E 1 (0/18) (0/6) (0/12)

Ce-144 (30) 2.1E 1 02 4.2E 1 3.6E 1 (0) (-1.1 - 1.3)E 2 (-1.1 - 1.3)E 2 (-1.7 - 2.0)E 2 (0/18) (0/6) (0/12)

Th-232 (30) 6.2E 2 02 1.5E 3 8.4E 2 (0) (-1.7 - 22.8)E 2 (-3.4 - 227.8)E 1 ( 1.8- 22.6)E 2 (8/18) (5/6) (9/12)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.7 Fish Semiannual fish (FH) and invertebrate samples are required from two locations. The Program calls for samples to be collected semiannually, or in season, from two locations. Quarterly collections are attempted to cover the sampling requirements. This section presents the results for fish sampling only.

Invertebrate results may be found in Sections 3.8 and 3.9, entitled Lobsters and Shellfish, respectively.

During the year, 7-fish samples were collected. The first quarter attempt to collect fish at the control location, FH-53, failed to produce a sample due to the lack of fish. The fish species available from Station FH-03 (indicator station) and Station FH-53 (control station) was dominated by Winter and Yellow-Tail Flounder.

A gamma analysis was performed on the edible portion of each sample collected. In 2007, the only radionuclide detected in fish samples was naturally occurring K-40. No plant related radionuclides were detected. No increasing or decreasing trends were observed. Subsequently, there is no dose to the public or impact to the environment, through this pathway, from plant operations. This is consistent with previous years of plant operations, as well as the pre-operational program.

In addition to the required program for fish as defined in the ODCM, the Station has an understanding with the New Hampshire Fish & Game Department (NH F&G) to include cunner fish in the analysis, if captured in sufficient numbers, from the vicinity of the discharge area, the traveling screens and from Ipswich Bay.

If there are insufficient catches in any of these areas, there will be no cunner included as a separate species in the report for that given year. For 2007, insufficient volume was obtained during routine collections to satisfy the sample protocol of 2200 gm mass. For 2008, the sampling and analysis protocols will be re-assessed to provide a larger probability of obtaining a viable sample mass for analysis.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Fish (FH) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Be-7 (7) -8.5E 0 5.6E 1 5.6E 1 (0) (-1.1 - 1.3)E 2 ( 0.0 - 1.4)E 2 ( 0.0- 1.4)E 2 (0/4) (0/3) (0/3)

K-40 (7) 3.2E 3 3.2E 3 2.9E 3 (0) ( 2.8- 3.5)E 3 ( 2.8 - 3.5)E 3 ( 2.5 - 3.4)E 3 (4/4) (4/4) (3/3)

Cr-51 (7) 3.3E 1 3.3E 1 -8.7E 1 (0) (-1.0 - 1.3)E 2 (-1.0 - 1.3)E 2 ( -2.9 - 0.3)E 2 (0/4) (0/4) (0/3)

Mn-54 (7) 130 8.OE 0 9.7E 0 9.7E 0 (0) (-2.3 - 24.0)E 0 (-9.0 - 26.0)E 0 ( -9.0 - 26.0)E 0 (0/4) (0/3) (0/3)

Co-57 (7) 3.3E 0 7.4E 0 7.4E 0 (0) (-3.4 - 6.5)E 0 (-8.0 - 15.3)E 0 ( -8.0- 15.3)E 0 (0/4) (0/3) (0/3)

Co-58 (7) 130 -2.2E 0 -3.3E -1 -3.3E -1 (0) (-1.4- 2.1)E 1 (-1.5- 1.2)E 1 (-1.5- 1.2)E 1 (0/4) (0/3) (0/3)

Fe-59 (7) 260 1.3E 1 1.3E 1 3.OE 0 (0) (-3.6 - 5.0)E 1 (-3.6 - 5.0)E 1 ( -2.8 - 2.3)E 1 (0/4) (0/4) (0/3)

Co-60 (7) 130 1.OE 1 1.OE 1 1.OE 1 (0) (-1.1 -4.1)E 1 (-1.1 -4.1)E 1 ( -2.0 - 3.3)E 1 (0/4) (0/4) (0/3)

Zn-65 (7) 260 -1.8E 1 2.9E 1 2.9E 1 (0) (-5.3 - 3.5)E 1 (-4.4- 11.2)E 1 ( -4.4 - 11.2)E 1 (0/4) (0/3) (0/3)

Se-75 (7) -8.3E 0 -2.3E 0 -2.3E 0 (0) (-2.6 - 0.2)E 1 (-4.4 - 2.2)E 1 ( -4.4 - 2.2)E 1 (0/4) (0/3) (0/3)

Zr-95 (7) 2.2E 1 2.2E 1 -1.4E 1 (0) (-6.0 - 71.0)E 0 (-6.0 - 71.0)E 0 (-1.7 -- 1.2)E 1 (014) (0/4) (013)

Ru-1 03 (7) -4.OE 0 -4.OE 0 -9.3E 0 (0) (-1.3- 1.3)E 1 (-1.3- 1.3)E 1 (-2.7 - 0.5)E 1 (0/4) (0/4) (0/3)

Ru-1 06 (7) 2.9E 1 2.9E 1 -6.6E 1 (0) (-4.7 - 12.0)E 1 (-4.7 - 12.0)E 1 (-1.3- 0.1)E 2 (0/4) (0/4) (0/3)

Ag-1 08m (7) 6.3E 0 6.3E 0 -5.1E 0 (0) (-3.8 - 16.0)E 0 (-3.8 - 16.0)E 0 (-1.3 -0.0)E 1 (0/4) (0/4) (0/3)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Fish (FH) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ag-11Om (7) -8.8E 0 53 1.3E 1 1.3E 1 (0) (-2.5 - -0.2)E 1 ( 0.0 - 3.2)E 1 0.0 - 3.2)E 1 (0/4) (0/3) (0/3)

Sb-124 (7) 3.4E 1 53 3.9E 1 3.9E 1

( 9.0- 84.0)E (0) ( 6.0 - 61.0)E 0 ( 9.0 - 84.0)E 0 0 (0/4) (0/3) (0/3)

Sb-125 (7) -1.1E 1 53 1.3E 1 1.3E 1 (0) ( -4.2 - 3.5)E 1 (-2.1 - 5.1)E 1 (-2.1 - 5.1)E 1 (0/4) (0/3) (0/3) 1-131 (7) 2.0E 1 53 2.4E 1 2.4E 1 (0) (-2.3 - 6.7)E 1 ( 2.0 - 3.0)E 1 ( 2.0 - 3.0)E 1 (0/4) (0/3) (0/3)

Cs-134 (7) 130 4.3E 0 03 4.3E 0 -1.2E 1 (0) (-2.0- 1.9)E 1 (-2.0- 1.9)E 1 (-1.7 -- 0.5)E 1 (0/4) (0/4) (0/3)

Cs-1 37 (7) 150 -3.4E 0 53 9.3E 0 9.3E 0 (0) (-1.9- 0.7)E 1 (-8.0 - 39.0)E 0 (-8.0 - 39.0)E 0 (0/4) (0/3) (0/3)

Ba-140 (7) -8.5E 0 53 4.6E 1 4.6E 1 (0) (-4.1 - 3.6)E 1 0.0- 1.2)E 2 ( 0.0- 1.2)E 2 (0/4) (0/3) (0/3)

Ce-141 (7) 1.3E 0 03 1.3E 0 -4.7E 0 (0) (-2.3- 1.1)E 1 (-2.3- 1.1)E 1 (-2.6 - 1.9)E 1 (0/4) (0/4) (0/3)

Ce-144 (7) 9.5E 0 03 9.5E 0 -5.9E 1 (0) (-7.4 - 13.3)E 1 (-7.4 - 13.3)E 1 (-1.2 - 0.0)E 2 (0/4) (0/4) (0/3)

Th-232 (7) 1.4E 1 53 5.8E 1 5.8E 1 (0) (-1.4 - 4.2)E 1 ( 2.1 - 11.7)E 1 2.1 - 11.7)E 1 (0/4) (0/3) (0/3)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.8 Lobsters Semiannual fish and invertebrate samples were required from two locations. This section provides the results for one type of invertebrate - Homarus americanus (American lobsters) which is an important commercial food species from local waters. Fish and other invertebrate results may be found in Sections 3.7 and 3.9, entitled Fish and Shellfish, respectively. Samples were collected from two locations semiannually. Lobsters (HA) were collected from an indicator location near the discharge (HA-04) and from a control location (HA-54) within Ipswich Bay. A total of four samples were collected for the year.

A gamma analysis was performed on each sample. The only radionuclide detected in lobster samples in 2007 was naturally occurring K-40 (all samples). No plant related radionuclides were detected.

Therefore, no increasing or decreasing trends were observed. Subsequently, there is no dose to the public or impact to the environment, from this pathway, from plant operations. This is consistent with previous years of plant operations as well as the pre-operational program.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: American Lobster (HA) UNITS: pCilkcq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Be-7 (4) 1.6E 1 1.6E 1 -5.2E 1 (0) -1.0 - 4.2)E 1 (-1.0 - 4.2)E 1 (-7.3--3.0)E 1 (0/2) (0/2) (0/2)

K-40 (4) 1.9E 3 2.5E 3 2.5E 3 (0) 1.7 - 2.0)E 3 1.9- 3.1)E 3 ( 1.9-3.1)E3 (2/2) (2/2) (2/2)

Cr-51 (4) -1.2E 2 -1.1E 2 -1.1E 2 (0) (-1.8 - -0.7)E 2 (-2.7 - 0.6)E 2 -2.7 - 0.6)E 2 (0/2) (0/2) (0/2)

Mn-54 (4) 130 -4.5E 0 3.5E 0 3.5E 0 (0) ( -1.2 - 0.3)E 1 (-1.0 - 8.0)E 0 (-1.0 - 8.0)E 0 (012) (0/2) (0/2)

Co-57 (4) -5.2E 0 2.3E 0 2.3E 0 (0) (-8.0 - -2.4)E 0 (-1.4 - 6.0)E 0 (-1.4 - 6.0)E 0 (0/2) (0/2) (0/2)

Co-58 (4) 130 -1.OE 0 4.5E 0 4.5E 0 (0) (-2.0 - 0.0)E 0 (-4.0 - 13.0)E 0 -4.0 - 13.0)E 0 (0/2) (0/2) (0/2)

Fe-59 (4) 260 -9.5E 0 3.OE 1 3.OE 1 (0) (-3.4 - 1.5)E 1 ( 1.0- 58.0)E 0 1.0 - 58.0)E 0 (0/2) (0/2) (0/2)

Co-60 (4) 130 7.3E 0 7.3E 0 -4.5E 0 (0) 5.7- 9.0)E 0 ( 5.7 - 9.0)E 0 (-9.0 - O.O)E 0 (0/2) (0/2) (0/2)

Zn-65 (4) 260 -2.6E 1 -2.6E 1 -5.1E 1 (0) (-8.5 - 3.4)E 1 (-8.5 - 3.4)E 1 (-6.5 - -3.7)E 1 (0/2) (0/2) (0/2)

Se-75 (4) 9.9E 0 1.1E 1 1.1E 1 (0) 7.9-12.0)EO 6.0- 16.0)E 0 6.0 - 16.0)E 0 (0/2) (0/2) (0/2)

Zr-95 (4) -2.4E 1 8.5E 0 8.5E 0 (0) (-4.0 - -0.8)E 1 ( 7.0- 10.0)E 0 7.0 - 10.0)E 0 (0/2) (0/2) (0/2)

Ru-103 (4) 5.5E 0 5.5E 0 -1.8E 1 (0) 3.0- 8.0)E 0 3.0 - 8.0)E 0 (-2.9 - -0.6)E 1 (0/2) (0/2) (0/2)

Ru-106 (4) -3.5E 1 6.OE 1 6.OE 1 (0) (-7.0 - 0.0)E 1 6.0 - 6.0)E 1 ( 6.0 - 6.0)E 1 (0/2) (0/2) (0/2)

Ag-108m (4) 2.OE 0 2.OE 0 -9.2E 0 (0) (-6.0 - 10.0)E 0 (-6.0 - 10.0)E 0 (-1.5- -0.3)E 1 (0/2) (0/2) (0/2)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: American Lobster (HA) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected*-)

Ag-110m (4) 0.OE 0 04 0.0E 0 -5.02 -1 (0) 0.0 -0.0)E 0 0.0 - 0.0)E 0 (-6.0 - 5.0)E 0 (0/2) (0/2) (0/2)

Sb-124 (4) -1.OE 1 54 8.0E 0 8.0E 0 (0) -2.0 - 0.0)E 1 (-1.5- 3.1)E 1 (-1.5- 3.1)E 1 (0/2) (0/2) (0/2)

Sb-125 (4) 4.OE 0 54 2.6E 1 2.6E 1 (0) -4.0 - 12.0)E 0 (1.1 -4.0)E 1 ( 1.1 - 4.0)E 1 (0/2) (0/2) (0/2) 1-131 (4) -1.2E 1 04 -1.2E 1 -5.42 1

(-1.2 -- 1.2)E 1 (-1.2 -- 1.2)E 1 (-7.5 - -3.2)E 1 (0)

(0/2) (0/2) (0/2)

Cs-1 34 (4) 130 -1.6E 1 04 -1.6E 1 -1.6E 1 (0) -3.1 - 0.0)E 1 (-3.1 - 0.0)E 1 ( -3.8 - 0.6)E 1 (0/2) (0/2) (0/2)

Cs-1 37 (4) 150 -1.8E 1 54 5.52 0 5.52 0 (0) -3.5 - 0.0)E 1 ( 3.0- 8.0)E 0 ( 3.0 - 8.0)2 0 (0/2) (0/2) (0/2)

Ba-140 (4) -7.5E 0 54 2.82 1 2.82 1 (0) (-2.6- 1.1)E 1 ( 0.0 - 5.6)E 1 ( 0.0 - 5.6)2 1 (0/2) (0/2) (0/2)

Ce-141 (4) 2.5E 0 04 2.5E 0 -1.52 0 (0) (-2.0 - 7.0)E 0 (-2.0 - 7.0)E 0 ( -6.0 - 3.0)2 0 (0/2) (0/2) (0/2)

Ce-144 (4) 4.5E 1 54 5.92 1 5.9E 1 (0) ( 3.7 - 5.3)E 1 ( 5.7- 6.0)E 1 ( 5.7- 6.0)E 1 (0/2) (0/2) (0/2)

Th-232 (4) 2.5E 0 04 2.5E 0 2.0E 0 (0) (-2.6 - 3.1)E 1 (-2.6- 3.1)E 1 (-8.0 - 12.0)E 0 (0/2) (0/2) (0/2)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.9 Shellfish Semiannual fish and invertebrate samples are required by the ODCM from two locations. This section provides the results for shellfish (MU) samples only. Fish and other invertebrate results may be found in the Sections 3.7 and 3.8, entitled Fish and Lobsters, respectively. In 2007, four locations (two indicators and two controls) were included in the sample collections During the year there were two species of mussels (MU) harvested for analysis. Modioli (horse mussels) were collected, by divers, from near the discharge outfall (indicator station MU-06) and from Ipswich Bay (control MU-56). Mytilus (blue mussels) were collected from the intratidal areas of Seabrook Harbor (indicator MU-09) and Plum Island, MA (control MU-59). A total of eight samples were collected in 2007 and analyzed for radioactivity in the edible portion or meat of the shellfish.

Additional analyses were conducted on the May and November shellfish collections from both indictor (MS-06) and control (MS-56) locations where mussel shells (MS) were also analyzed for Strontium 90 (four samples) to see if there is any indication of strontium uptake into the shell. For 2007, no Sr-90 was detected in any sample. These analyses are not required by the REMP as defined in the ODCM.

The only radionuclide detected in shellfish samples (either edible portion or shell) in 2007 was naturally occurring K-40. No plant related gamma emitting radionuclides or strontium was detected. Therefore, no increasing or decreasing trends were observed. Subsequently, there is no dose to the public or impact to the environment, from this pathway, from plant operations. This is consistent with the pre-operational program and with previous years of plant operations.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

I"t = rHl I IJ

" e mIt*C2 A RAH HKII fl; III I*LLflII .... J4 UItJI Y.C*W WI. PJ~*f U~

Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected"*) (No. Detected*)

Be-7 -4.6E 1 5.1E 1 4.8E 1

(-1.0 - 0.3)E 2 ( -8.6 - 18.7)E 1 (-8.6 - 18.7)E 1 (0/4) (0/2) (0/4)

K-40 1.OE 3 1.2E 3 1.2E 3 4.4 - 14.6)E 2 1.1 - 1.3)E 3 ( 4.9 - 18.3)E 2 (2/4) (2/2) (3/4)

Cr-51 5.5E 1 1.3E 2 1.iE 1

(-7.0- 17.0)E 1 ( 9.0 - 17.0)E 1 (-1.5- 1.3)E 2 (0/4) (0/2) (0/4)

Mn-54 130 8.6E 0 1.1E 1 -7.5E -1 3.0 - 12.0)E 0 1.0- 1.2)E 1 (-1.0 - 0.9)E 1 (0/4) (0/2) (0/4)

Co-57 -1.9E 0 3.7E 0 -1.8E 0

(-1.5- 0.5)E 1 ( -2.4 - 9.8)E 0 (-1.3- 1.0)E 1 (0/4) (0/2) (0/4)

Co-58 130 -1.4E 1 8.3E 0 4.2E 0

(-2.1 -- 0.3)E 1 ( 7.7 - 9.0)E 0 (-7.0 - 9.0)E 0 (0/4) (0/2) (0/4)

Fe-59 260 -4.3E 0 7.OE 0 -1.9E 1

(-1.6- 1.4)E 1 ( 0.0- 1.4)E 1 ( -6.8 - 0.3)E 1 (0/4) (0/2) (0/4)

Co-60 130 -3.2E 0 5.5E 0 -6.5E 0

(-1.4 - 0.8)E 1 ( 3.1 - 8.0)E 0 ( -1.7 - 0.7)E 1 (0/4) (0/2) (0/4)

Zn-65 260 -2.9E 1 -1.8E 1 -3.OE 1

(-4.2 - 0.0)E 1 ( -3.5 - 0.0)E 1 (-6.0 - O.O)E 1 (0/4) (0/2) (0/4)

Se-75 3.5E 0 1.8E 1 9.5E 0

(-7.0 - 18.0)E 0 ( 5.0- 31.0)E 0 (-8.0- 31.0)E 0 (0/4) (0/2) (0/4)

Zr-95 4.8E 0 8.OE 0 -6.OE 0

(-2.0 - 3.0)E 1 (-1.4 - 3.0)E 1 (-1.9 - 0.8)E 1 (0/4) (0/2) (0/4)

Ru-103 4.OE 0 2.2E 1 2.OE 0

(-2.7 - 4.6)E 1 (-3.0 - 46.0)E 0 (-5.0 - 7.0)E 0 (0/4) (0/2) (0/4)

Ru-1 06 -2.5E 1 2.1E 2 8.3E 1

(-5.0 - 2.0)E 1 2.0 - 40.0)E 1 (-1.6 - 4.0)E 2 (0/4) (0/2) (0/4)

Ag-108m 2.9E 0 9.2E 0 7.8E 0

(-1.1 - 0.9)E 1 2.4 - 16.0)E 0 ( 0.0 - 1.6)E 1 (0/4) (0/2) (0/4)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Mussel Body (MU) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected"*) (No. Detected**) (No. Detected**)

Ag-11im (8) 2.32 0 06 1.5E 1 -9.8E 0 (0) (-3.5- 1.9)E 1 1.0 - 1.9)E 1 (-1.4--0.5)E 1 (0/4) (0/2) (0/4)

Sb-1 24 (8) -1.2E 1 56 3.0E 0 -5.8E 0 (0) (-2.7 - 0.0)E 1 0.0 - 6.0)E 0 (-6.7 - 3.8)E 1 (0/4) (0/2) (0/4)

Sb-125 (8) -2.12 1 06 -1.3E 1 -3.0E 1 (0) (-6.9 - 3.3)E 1 (-5.8 - 3.3)E 1 (-7.4 - -0.6)E 1 (0/4) (0/2) (0/4) 1-131 (8) -1.3E 0 56 3.5E 1 6.5E 0 (0) ( -3.1 - 2.5)E 1 ( 1.8- 5.1)E 1 (-2.6 - 5.1)E 1 (0/4) (0/2) (0/4)

Cs-1 34 (8) 130 -8.8E 0 56 1.4E 1 1.22 1 (0) (-3.2- 1.5)E 1 ( 2.5 - 25.0)2 0 2.0 - 25.0)E 0 (0/4) (0/2) (0/4)

Cs-137 (8) 150 -2.4E 0 56 4.02 0 -4.3E 0 (0) ( -1.8 - 0.6)E 1 (-2.0 - 10.0)E 0 (-3.1 - i.0)E 1 (0/4) (0/2) (0/4)

Ba-140 (8)

1.4E i 09 4.2E 1 2.52 0 (0) (-3.9 - 8.4)E 1 ( 0.0 - 8.4)E 1 (-2.2 - 2.1)E 1 (0/4) (0/2) (0/4)

Ce-141 (8) -1.5E 1 59 6.5E 0 5.0E -1 (0) (-4.7- 1.2)E 1 ( 1.0- 12.0)E 0 (-2.1 - 1.2)E 1 (0/4) (0/2) (0/4)

Ce- 144 (8) -7.OE 0 06 3.52 1 -5.3E 1 (0) ( -6.7- 4.7)E 1 ( 2.3 - 4.7)E 1 (-1.6- 0.1)E 2 (0/4) (0/2) (0/4)

Th-232 (8) -9.52 0 06 1.4 1 -2.0E 1 (0) (-6.5 - 3.5)E 1 (-8.0 - 35.0)E 0 (-4.2 - -0.7)E 1 (0/4) (0/2) (0/4)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Mussel Shell (MS) UNITS: poCi/kci Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Sr-90 (4) 300 -2.5E 1 56 -1.7E I -1.7E 1 (0) (-6.0- 1.0)E 1 (-6.1 - 2.8)E 1 (-6.1 - 2.8)E 1 (0/2) (0/2) (0/2)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.10 Irish Moss There is no REMP technical requirement defined in the ODCM to collect Irish Moss (algae) samples. As a supplement to the required REMP, semiannual Chondrus (Irish Moss) samples were collected from an indicator area near plant discharge (AL-05) and a control location (AL-55) within Ipswich Bay. If plant related radionuclides were re-concentrating in the aquatic environment, an early indication of this may be shown in this type of environmental species. Four routine samples (two indicators and two controls) were collected for the year.

A gamma analysis was performed on each sample. Naturally occurring Potassium-40 was detected in all samples for both indicator and control stations. No plant related radionuclides were detected in any samples. Therefore, no plant related increasing or decreasing trends were observed. Subsequently, there is no dose or impact to the environment, through this pathway, from plant operations. This is consistent with the pre-operational program and with previous years of plant operations.

Any sample collection and analysis deviations from the ODCM defined program, or reportable concentrations that may have occurred during the year, are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Irish Moss (AL) UNITS: pCi/kq Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected*) (No. Detected**) (No. Detected**)

Be-7 (4) 1.4E 2 05 1.4E 2 6.7E 1 (0) ( 1.1 - 1.8)E 2 1.1 - 1.8)E 2 (-3.3 - 16.6)E 1 (0/2) (0/2) (0/2)

K-40 (4) 8.OE 3 05 8.OE 3 5,1E 3 (0) ( 7.8- 8.1)E 3 7.8- 8.1)E 3 4.5 - 5.7)E 3 (2/2) (2/2) (2/2)

Cr-51 (4) -1.9E I 55 3.1E 1 31E 1 (0) (-7.0 - 3.3)E 1 2.1 - 4,0)E 1 (2.1 - 4.0)E 1 (0/2) (0/2) (0/2)

Mn-54 (4) -1.5E 0 55 9.5E -1 9.5E -1 (0) (-5.0- 2.1)E 0 -5.4 - 7.3)E 0 (-5.4 - 7.3)E 0 (0/2) (0/2) (0/2)

Co-57 (4) 1.OE 0 05 1.OE 0 I.OE -1 (0) (-1.9 - 3.9)E 0 (-1.9 - 3.9)E 0 -3.4 - 3.6)E 0 (0/2) (0/2) (0/2)

Co-58 (4) -1.7E 0 05 -1.7E 0 -4.8E 0 (0) -1.3- 1.0)E 1 (-1.3- 1,0)E 1 (-7.6 - -2.0)E 0 (0/2) (0/2) (0/2)

Fe-59 (4) -9.5E 0 55 2.5E 0 2.5E 0 (0) -1.0 -- 0.9)E 1 0.0 - 5.0)E 0 S0.-5.0)E 0 (0/2) (0/2) (0/2)

Co-60 (4) 1.8E 0 05 1.8E 0 -8.3E 0 (0) (-4.5 - 8.0)E 0 (-4.5 - 8.0)E 0 (-1.3--0.4)E 1 (0/2) (0/2) (0/2)

Zn-65 (4) 5.OE -1 05 5.0E -1 -2.3E 1 (0) (-8.0 - 9.0)E 0 (-8.0 - 9.0)E 0 (-3.8--0.8)E 1 (0/2) (0/2) (0/2)

Se-75 (4) -1.OE 0 55 1.5E -1 1.5E -1 (0) -6.1 - 4.i)E 0 (-1.9 - 2.2)E 0 (-1.9 - 2.2)E 0 (0/2) (0/2) (0/2)

Zr-95 (4) -i.4E 1 55 -5.5E 0 -5.5E 0 (0) -1.6 -- 1.2)E 1 -2.5 - 1.4)E 1 (-2.5- 1.4)E 1 (0/2) (0/2) (0/2)

Ru-103 (4) -4.4E 0 55 2.2E 0 2.2E 0 (0) (-5.5 - -3.3)E 0 (-1.5 - 5.9)E 0 ( -1.5 - 5.9)E 0 (0/2) (0/2) (0/2)

Ru-1 06 (4) 1.OE 0 05 1.OE 0 -1.7E 2 (0) (-4.9 - 5.1)E 1 -4.9 - 5.1)E 1 (-1.9 - -1.6)E 2 (0/2) (0/2) (0/2)

Ag-108m (4) -3.1E 0 55 4.8E 0 4.8E 0 (0) (-1.0 - 0.4)E 1 9.0 - 86.0)E -1 9.0 - 86.0)E -1 (0/2) (0/2) (0/2)

Ag-1lOm (4) -8.OE 0 55 -3.OE 0 -3.OE 0 (0) (-1.7- 0.1)E 1 -1.1 - 0.5)E 1 (-1.1 - 0.5)E 1 (0/2) (0/2) (0/2)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Irish Moss (AL) UNITS: pCilka Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected-*)

Sb-124 (4) -1.2E 1 55 1.5E -1 1.5E -1 (0) (-1.7--0.7)E 1 ( -7.0 - 7.3)E 0 ( -7.0 - 7.3)E 0 (0/2) (0/2) (0/2)

Sb-125 (4) -8.5E 0 55 1.5E 0 1.5E 0 (0) (-1.4--0.3)E 1 ( 0.0 - 3.0)E 0 ( 0.0- 3.0)E 0 (0/2) (0/2) (0/2) 1-131 (4) 1.9E 1 55 4.8E 1 4.8E 1 (0) 1.3 - 2.5)E 1 (-4.0 - 100.0)E 0 (-4.0 - 100.0)E 0 (0/2) (0/2) (0/2)

Cs-1 34 (4) 60 1.1E 1 05 1.1E 1 8.6E 0 (0) 9.1 - 12.7)E 0 ( 9.1 - 12.7)E 0 ( 1.2- 15.9)E 0 (0/2) (0/2) (0/2)

Cs-1 37 (4) 80 7.8E 0 05 7.8E 0 2.7E 0 (0) -3.0 - 18.7)E 0 (-3.0 - 18.7)E 0 ( 1.6-3.7)E0 (0/2) (0/2) (0/2)

Ba-140 (4) -8.OE 0 55 -3.OE 0 -3.OE 0 (0) (-9.0 - -7.0)E 0 (-2.2 - 1.6)E 1 (-2.2- 1.6)E 1 (0/2) (0/2) (0/2)

Ce-141 (4) -7.9E 0 55 2.5E 0 2.5E 0 (0) (-1.0--0.6)E 1 (-6.5 - 11.6)E 0 (-6.5 - 11.6)E 0 (0/2) (0/2) (0/2)

Ce-144 (4) -3.6E 1 55 2.1E 1 2.1E 1 (0) (-7.2- 0.1)E 1 9.0 - 33.0)E 0 ( 9.0 - 33.0)E 0 (0/2) (0/2) (0/2)

Th-232 (4) -5.OE -1 55 4.5E 1 4.5E 1 (0) (-1.4 - 1.3)E 1 ( 1.5- 7.4)E 1 ( 1.5-7.4)E1 (0/2) (0/2) (0/2)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.11 Food Crop There is no requirement for food crop or vegetation samples as long as the required milk locations are available. As noted in Section 3.3, milk sampling at the minimum required number of locations in 2007 was not possible due to the limited inventory of milk animal sites in the plant vicinity. To compensate for this, vegetation samples were collected as part of the REMP. Section 3.12 describes the alternate broad leafy vegetation (TG) collections.

In addition to the broad leafy vegetation sampling, nine food crop (TF) samples were collected from three locations (indicator station TF-02 and TF-03, control station TF-06) during the growing season months (June, July and August). These include strawberries (June), green beans (July), and tomatoes (August) samples. For the year, a total of nine food crop samples were collected and analyzed for gamma emitting radionuclides.

The only radionuclide detected in 2007 was naturally occurring K-40. Potassium 40 was detected in all samples from both indicator and control stations. No plant related radionuclides were detected in any samples. Therefore, no increasing or decreasing trends are identified. Subsequently, there is no dose to the public or impact on the environment through this pathway from plant operations. This is consistent with the pre-operational program and with previous years of plant operations.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Food Croo (TFR UNITS: DCi/ka Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Be-7 -1.7E 1 2.6E 1 2.6E 1

(-1.3- 1.2)E 2 ( -3.4 - 7.0)E 1 (-3.4 - 7.0)E 1 (0/6) (0/3) (0/3)

K-40 1.7E 3 1.8E 3 1.7E 3

( 1.2 - 2.5)E 3 ( 1.2- 2.5)E 3 ( 1.4- 2.3)E 3 (6/6) (3/3) (3/3)

Cr-51 5.7E 1 6.7E 1 -1.1E 1

(-8.4 - 31.0)E 1 (-8.4 - 31.0)E 1 ( -8.9 - 3.0)E 1 (0/6) (0/3) (0/3)

Mn-54 6.OE -1 6.OE 0 4.OE 0

-1.2 - 2.4)E 1 (-1.2 - 2.4)E 1 (-8.0 - 23.0)E 0 (0/6) (0/3) (0/3)

Co-57 1.5E 0 6.6E 0 6.6E 0

(-3.4 - 10.0)E 0 ( 4.5 - 7.7)E 0 ( 4.5 - 7.7)E 0 (0/6) (0/3) (0/3)

Co-58 1.7E 0 6.OE 0 2.8E 0

(-9.6 - 17.0)E 0 (-2.0 - 17.0)E 0 (-1.4- 1.6)E 1 (0/6) (0/3) (0/3)

Fe-59 -1.8E 1 1.3E 1 1.3E 1

( -4.0 - 0.1)E 1 5.0 - 21.0)E 0 ( 5.0- 21.0)E 0 (0/6) (0/3) (0/3)

Co-60 2.3E 0 3.6E 0 -2.4E 0

(-3.0 - 7.0)E 0 1.0 - 7.0)E 0 (-9.3 - 4.0)E 0 (0/6) (0/3) (0/3)

Zn-65 -1.3E 1 -2.0E 0 -2.OE 0

(-5.9 - 0.8)E 1 (-2.4 - 3.1)E 1 (-2.4- 3.1)E 1 (0/6) (0/3) (0/3)

Se-75 2.9E 0 9.3E 0 6.1E 0

(-1.5- 2.1)E 1 (-8.0 - 21.0)E 0 ( 5.3 - 7.0)E 0 (0/6) (0/3) (0/3)

Zr-95 6.3E 0 9.7E 0 -6.3E 0

(-9.0 - 25.0)E 0 (-4.0 - 25.0)E 0 (-4.2 - 2.7)E 1 (0/6) (0/3) (0/3)

Ru-1 03 -4.6E 0 2.6E 0 2.6E 0

(-2.7- 1.7)E 1 (-7.0 - 16.0)E 0 (-7.0 - 16.0)E 0 (0/6) (0/3) (0/3)

Ru-1 06 -8.2E 0 3.8E 1 3.8E 1

(-1.8 - 1.7)E 2 (-4.6 - 16.0)E 1 (-4.6- 16.0)E 1 (0/6) (0/3) (0/3)

Ag-108m 2.8E 0 5.8E 0 -5.7E 0

(-3.6 - 1i.0)E 0 0.0- 1.1)E 1 (-1.8 - 0.4)E 1 (0/6) (0/3) (0/3)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007) i~ rll:;r i K1 I

a. A* lr, ITrcI ":: I dT*, (,MIt Illl,--I,-/ll,.llll. I UU*J ",*,/IU*/ l I I

I./1111 I*, IJ*,,*lln.H Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected**)

Ag-11im (9) -2.3E 0 03 -2.OE 0 -2.3E 0 (0) (-6.0 - 0.0)E 0 (-6.0 - 0.0)E 0 (-1.2 - 1.5)E 1 (0/6) (0/3) (0/3)

Sb-124 (9) -9.8E 0 06 3.7E 0 3.7E 0 (0) (-5.5 - 2.7)E 1 (-1.1 - 2.2)E 1 (-1.1 - 2.2)E 1 (0/6) (0/3) (0/3)

Sb-125 (9) 1.4E 1 03 2.9E I -6.3E 0 (0) (-2.3 - 4.5)E 1 ( 3.0 - 45.0)E 0 (-2.5 - 0.4)E 1 (0/6) (0/3) (0/3) 1-131 (9) 60 4.5E 0 02 1.1E 1 -1.7E 1 (0) (-1.3- 1.8)E 1 7.0- 18.0)E O (-3.7 - 2.1)E 1 (0/6) (0/3) (0/3)

Cs-134 (9) 60 2.5E 0 02 7.7E 0 3.6E 0 (0) (-1.1 - 1.2)E 1 2.0- 12.0)E 0 (-1.4- 1.5)E I (0/6) (0/3) (0/3)

Cs-1 37 (9) 80 -4.9E 0 06 5.2E 0 5.2E 0 (0) (-1.2 - 0.2)E 1 (-4.0 - 10.4)E 0 (-4.0 - 10.4)E 0 (0/6) (0/3) (0/3)

Ba-140 (9) -1.2E 1 06 2.3E0 2.3E 0 (0) -4.4 - 1.8)E 1 (-1.2 - 2.8)E 1 (-1.2 - 2.8)E 1 (0/6) (0/3) (0/3)

Ce-141 (9) -1.3E 0 03 9.7E 0 -3.3E -1 (0) -2.9 - 2.5)E 1 ( 0.0 - 2.5)E 1 (-9.0 - 15.0)E 0 (0/6) (0/3) (0/3)

Ce-144 (9) 1.5E 1 03 3.OE 1 -3.3E 1 (0) -4.1 - 5.2)E 1 ( 7.0 - 52.0)E 0 (-7.9 - 3.2)E 1 (0/6) (0/3) (0/3)

Th-232 (9) -8.5E 0 03 2.3E 1 1.9E 1 (0) -5.4 - 6.2)E 1 (-1.6 - 6.2)E 1 1.2-3.3)E1 (0/6) (0/3) (0/3)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.12 Vegetation In lieu of milk sampling, the ODCM, Table A.9.1-1, requires broad leafy vegetation (TG) samples grown nearest of two different offsite locations with the highest D/Q, and one control location 15-30 km distant in the least prevalent wind direction, be collected when available (growing season). Offsite locations are defined in the UFSAR, as a minimum, the land beyond a 3000-foot radius of the two Containment building centerlines. The analysis of garden locations in the Land Use Census provides a ranking of potential sampling sites for use in determining sampling locations in the general population. Since sampling of three different types of broad leaf garden vegetables at high D/Q locations is not feasible due to uncertain availability, other types of broad leafy vegetation were utilized.

Two locations at the site boundary with a maximum D/Q (higher values than determined in the 2007 land use census garden listing) were selected over ranked D/Q gardens in the general population. These two locations (TG-08 and TG-09) are on FPL Energy property in areas with available sample media. A third far field control location (TG-10) was selected in Georgetown, MA. Sampling tree leaves as broad leaf vegetation at the selected locations provide increased reliability for sample availability. For 2007, monthly (six month growing season, May through October) broad leaf vegetation samples from the three sites were collected and analyzed gamma spectroscopy.

The only radionuclides detected in 2007 were naturally occurring K-40 and Be-7. Both radionuclides were detected at both indicator and control locations. Potassium-40 was seen in all samples, while Be-7 was detected as positive in 15 of the 18 samples analyzed. No plant related radionuclides were detected in any samples. Utilizing the results of broad leaf vegetation sampling for broad leaf food products, there was no detectable dose impact to the public or on the environment through this food ingestion pathway from plant operations.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Vegetation (TG) UNITS: pCi/kq wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected-) (No. Detected**)

Be-7 (18) 1.3E 3 1.3E 3 1.2E 3 (0) ( 4.9 - 31.5)E 2 ( 5.6 - 25.8)E 2 2.5 - 22.9)E 2 (10/12) (616) (5/6)

K-40 (18) 3.3E 3 3.4E 3 3.2E 3 (0) ( 2.6 - 4.4)E 3 ( 2.6- 4.0)E 3 1.9-4.1)E3 (12/12) (6/6) (6/ 6)

Cr-51 (18) -1.9E 1 1.OE 1 -1.1E 2 (0) -2.1 - 1.7)E 2 (-5.0- 13.0)E 1 (-2.4 - 2.0)E 2 (0/12) (0/6) (0/6)

Mn-54 (18) 5.5E 0 6.8E 0 1.7E -1 (0) (-1.0- 15.0)E 0 ( 2.0- 13.0)E 0 (-2.2 - 0.9)E 1 (0/12) (0/6) (0/6)

Co-57 (18) 4.6E 0 5.9E 0 -3.7E 0 (0) -4.4- 11.9)E 0 (-4.4 - 11.9)E 0 (-3.5 - 1.9)E 1 (0/12) (0/6) (0/6)

Co-58 (18) -3.1E 0 1.OE 0 1.OE 0 (0) (-2.4- 1.4)E 1 (-1.6- 1.9)E 1 (-1.6 - 1.9)E 1 (0/ 12) (0/6) (0/ 6)

Fe-59 (18) -1.7E 1 4.5E 0 4.5E 0 (0) (-4.9 - 2.6)E 1 ( -4.5 - 5.6)E 1 (-4.5 - 5.6)E 1 (0/12) (0/6) (0/6)

Co-60 (18) 1.1E 0 6.3E 0 6.3E 0 (0) (-2.8 - 2.2)E 1 ( -1.1 - 2.2)E 1 (-1.1 - 2.2)E 1 (0/12) (0/6) (0/6)

Zn-65 (18) -4.3E 0 4.8E 0 -3.8E 0 (0) ( -6.1 - 4.8)E 1 (-6.1 - 4.8)E 1 (-6.5 - 6.1)E 1 (0/12) (0/6) (0/6)

Se-75 (18) -6.5E 0 1.8E 0 1.3E 0 (0) ( -2.5 - 2.3)E 1 ( -1.3 - 2.3)E 1 (-1.1 - 2.4)E 1 (0/12) (0/6) (0/6)

Zr-95 (18) -4.3E 0 -2.3E 0 -3.7E 0 (0) ( -4.0 - 2.7)E 1 (-3.1 - 2.1)E 1 (-2.4 - 4.0)E 1 (0/12) (0/6) (0/6)

Ru-1 03 (18) -5.1E 0 1.8E 0 1.8E 0 (0) (-3.2 - 1.9)E 1 ( -2.0 - 3.0)E 1 (-2.0 - 3.0)E 1 (0/12) (0/6) (0/ 6)

Ru-1 06 (18) -1.8E 1 -1.1E 1 -7.9E 1 (0) (-1.8- 1.3)E 2 (-1.8- 1.3)E 2 (-3.4 - 0.4)E 2 (0/12) (0/6) (0/6)

Ag-1 08m (18) 4.5E -1 2.6E 0 I.4E 0 (0) (-1.6- 1.6)E 1 (-8.0 - 16.1)E 0 (-1.3 - 3.4)E 1 (0/12) (0/6) (0/6)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January - December 2007)

MEDIUM: Vegetation (TG) UNITS: pCi/kq wet Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Station Mean Mean (No. Analyses) Required Range Range Range (Non-Routine*) LLD (No. Detected**) (No. Detected**) (No. Detected-*)

Ag-110m (18) -6.3E 0 09 -6.2E 0 -7.8E 0 (0) ( -3.4 - 2.2)E 1 (-3.4 - 2.2)E 1 -4.3 - 1.5)E 1 (0/12) (0/6) (0/6)

Sb-124 (18) -3.1E 0 10 1.7E 1 1.7E 1 (0) ( -4.6 - 4.6)E 1 (-1.0 - 3.7)E 1 (-1.0 - 3.7)E 1 (0/12) (0/6) (0/6)

Sb-125 (18) 1.6E 0 08 4.7E 0 -1.9E 1 (0) ( -5.8 - 3.9)E 1 (-4.0 - 3.3)E 1 -6.9 - 3.6)E 1 (0/12) (0/6) (0/6) 1-131 (36) 60 1.1E 1 08 2.OE 1 1.7E 1 (0) (-3.7 - 11 .0)E 1 (-1.8 - 9.2)E 1 (-5.1 - 25.0)E 1 (0/24) (0/12) (0/12)

Cs-134 (18) 60 3.6E 0 09 3.8E 0 8.3E -1 (0) (-1.2 - 3.4)E 1 (-8.0 - 26.0)E 0 -1.8 - 4.0)E 1 (0/12) (0/6) (0/6)

Cs-137 (18) 80 -5.9E -1 10 4.8E 0 4.8E 0 (0) (-2.5 - 3.2)E 1 (-3.5- 4.1)E 1 -3.5 - 4.1)E 1 (0/12) (0/6) (0/6)

Ba-140 (18) -9.6E 0 10 1.4E 1 1.4E 1 (0) (-1.9 - 0.6)E 2 (-2.8 - 7.2)E 1 -2.8 - 7.2)E 1 (0/12) (0/6) (0/6)

Ce-141 (18) -6.5E 0 08 -4.OE 0 -7.5E 0 (0) (-5.6 - 4.7)E 1 (-5.6- 4.7)E 1 (-3.6 - 3.2)E 1 (0/12) (0/6) (0/6)

Ce-144 (18) -6.8E 0 10 6.1E 1 6.1E 1 (0) (-3.9 - 4.9)E 1 (-2.2- 13.2)E 1 (-2.2 - 13.2)E 1 (0/12) (0/6) (0/6)

Th-232 (18) 1.8E 1 09 3.7E 1 3.4E 1 (0) (-4.6 - 7.1)E 1 (-8.0 - 71.0)E 0 (-5.9 - 13.6)E 1 (0/12) (0/6) (0/6)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.9.1-3.

- The fraction of sample analyses yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

3.13 Direct Radiation Direct gamma radiation exposure was measured with thermoluminescent dosimeters (TLDs). Two TLD badges are placed at each of the monitoring stations. Each TLD badge has 3 CaSO 4: Tm elements. A location result is an average of six independent readings per quarter. A total of forty-seven stations are located offsite, forty of which are required by the ODCM. The badges were collected and readout on a quarterly schedule.

The exposure rates were normalized to a 91-day quarter. A summary of the 2007 data is shown in Table 3.1. Overall, the REMP direct radiation program showed no statistically significant indication of increased direct radiation above the variable background measured exposure rate in unrestricted areas. This is demonstrated by the fact that indicator location results are statistically the same as control locations. The 2007 annual mean of all indicator locations was 15.8 mR/91-day quarter while the mean of all control locations was 17.0 mR/91-day quarter. This verifies that there is no statistical difference in the annual dose as a function of distance from the plant. The fractional difference of the 2007 TLD measurements compared with pre-operational TLD measurements (see Table 3.2 for pre-operational history) also shows that no direct dose beyond the site boundary was attributed to station operation during 2007.

The direct radiation-monitoring program demonstrated that there was no offsite dose to the public or impact to the environment from the operation of the plant. Therefore, no increasing or decreasing trends were detected.

Any sample collection and analysis deviations from the ODCM required program, or reportable concentrations that may have occurred during the year are described in Section 4.

TABLE 3.1 Environmental TLD Measurements Net Exposure in mR/Standard Quarter (91 days) 2007 Annual Sta. ist Quarter 2nd Quarter 3rd Quarter 4th Quarter Ave.

No. Description S.D. Exp. S.D. S.D. Exp.

TL-01 Brimmer's Lane 17.3 0.7 19.8 0.8 19.1 0.8 18.6 0.7 18.7 TL-02 Landing Road 12.8 0.4 13.6 0.6 13.1 0.8 14.0 0.7 13.4 TL-03 Glade Path 14.3 0.6 15.0 0.4 14.0 1.0 15.0 0.9 14.6 TL-04 Island Path 14.3 0.7 16.5 0.5 15.8 0.7 16.8 1.1 15.9 TL-05 Harbor Road 11.1 0.6 13.6 0.6 12.0 0.8 12.8 0.6 12.4 TL-06 Barge Landing 13.1 0.5 14.9 0.5 13.3 0.9 14.4 0.6 13.9 TL-07 Cross Road 11.7 0.6 12.8 0.7 11.5 0.6 12.9 0.7 12.2 TL-08 Farm Lane 14.2 0.7 16.4 1.0 14.8 0.7 15.6 0.6 15.2 TL-09 Farm Lane 14.9 0.7 16.1 0.7 15.5 1.0 16.1 1.1 15.7 TL-10 Site Boundary 16.0 1.3 18.5 1.0 16.8 0.8 17.2 1.0 17.2 TL-11 Site Boundary 15.5 0.7 18.5 1.5 16.9 0.8 17.0 0.8 17.0 TL-12 Site Boundary 16.1 0.7 19.3 0.9 17.6 0.9 18.2 0.8 17.8 TL-13 Inside Site Boundary 18.3 0.9 21.3 1.6 18.8 1.0 18.9 0.8 19.3 TL-14 Trailer Park 14.3 0.5 16.2 0.8 14.9 0.7 15.9 0.5 15.3 TL-15 Brimmer's Lane 16.2 1.1 21.1 0.8 20.1 1.1 19.8 1.2 19.3 TL-16 Brimmer's Lane 15.3 1.1 16.8 0.6 15.7 0.7 16.9 0.9 16.1 TL-17 South Road 14.3 0.6 16.3 0.8 15. 0 0.7 15.2 0.8 15.2 TL-18 Mill Road 13.9 0.5 15.7 0.9 15.2 0.8 16.1 1.7 15.2 TL-19 Appledore Avenue 14.2 0.6 15. 6 0.9 14.9 0.9 16.0 0.5 15.2 TL-20 Ashworth Avenue 15.9 0.9 17.5 0.9 16.2 1.0 16.8 0.7 16.6 TL-21 Route IA 13.9 0.6 16.1 0.6 14.8 0.7 15.4 0.5 15.1 TL-22 Cable Avenue 15.2 0.5 17. 6 0.5 16.3 0.9 16.8 0.9 16.5 TL-23 Ferry Road 14.0 0.6 16.6 0.7 15.4 0.8 16.1 0.9 15.5 TL-24 Ferry Lots Lane 14.1 0.8 16.1 0.7 15.8 0.8 15.3 0.6 15.3 TL-25 Elm Street 16.7 1.1 15.0 0.8 15. 9 0.9 15.9 TL-26 Route 107A 14.1 + 0.7 16.0 0.5 15.2 0.9 15.4 0.7 15.2 TL-27 Highland Street 14.7 + 0.7 16.6 0.8 15.6 0.9 16.5 0.9 15.9 TL-28 Route 150 14.7 + 0.8 16.3 1.1 15.2 0.7 17.5 1.6 15. 9 TL-29 Frying Pan Lane 14.2 + 0.8 15.3 0.7 15.3 0.7 14.9 0.9 14. 9 TL-30 Route 27 13.1 + 0.5 15. 9 0.8 15.7 0.8 16.1 0.7 15.2 TL-31 Alumni Drive 12.3 + 0.6 14.7 0.6 14.0 0.8 13.8 0.5 13.7 TL-32 SB Elementary School 16.5 + 0.7 18.1 0.8 17.3 0.9 17.8 0.9 17.4 TL-33 Dock Area 16.8 + 0.8 19.4 0.7 17.8 1.0 18.4 1.0 18.1 TL-34 Bow Street 18.5 + 0.9 20.1 0.9 18.7 0.8 18.8 1.0 19.0 TL-35 Lincoln Ack. School 16.5 + 0.7 18.3 1.0 17.7 0.9 17. 6 0.7 17.5 TL-36 Route 97(Control) 14.9 + 0.7 15.6 0.6 14.4 1.0 15.3 0.8 15.1 TL-37 Plaistow, NH (Control) 17.3 + 1.0 17.7 0.6 17.6 1.0 17.8 0.9 17.6 TL-38 Hampstead, NH (Control) 18.6 + 0.9 20.1 0.8 18.9 0.8 18.3 1.0 19.0 TL-39 Fremont, NH (Control) 20.8 + 0.7 22.4 1.0 21.7 0.9 20.0 1.1 21.2 TL-40 Newmarket, NH (Control) 14.9 + 0.8 16.7 0.9 16.3 1.0 15.5 1.0 15. 9 TABLE 3.1 Environmental TLD Measurements Net Exposure in mR/Standard Quarter (91 days) 2007 Annual Sta. Ist Quarter 2nd Quarter 3rd Quarter 4th Quarter Ave.

No. Description Exp. S.D. E S.D. Exp. S.D. Exp. S.D.

TL-41 Portsmouth, NH (Control) 15.7 + 0.7 17.4 + 0.7 16.1 + 1.2 16.3 + 0.6 16.4 TL-42 Ipswich, MA (Control) 13.7 + 0.7 14.7 + 0.8 14.3 + 0.9 13.9 + 0.6 14.2 TL-43 Rocks Road Landing 11.9 + 0.6 13.0 + 0.7 13.8 + 0.8 13.4 + 0.7 13.0 TL-44 SB Education Center 13.3 + 0.6 14.2 + 0.7 14.9 + 0.8 14.6 .+ 1.0 14.3 TL-45 Hampton Fire Station 16.4 + 0.7 17.9 + 1.2 16.8 + 1.2 15.9 + 0.6 16.7 TL-46 SB Police Station 15.7 + 0.6 16.2 + 0.6 16.1 + 1.2 16.5 + 0.6 16.1 TL-47 Route 84 14.8 + 1.4 15.7 + 0.7 16.1 + 1.6 15.3 + 0.6 15.5 Mean of Indicators 14.7 16.7 15.7 16.2 15.8 Mean of Controls 16.6 17.8 17.0 16.7 17.0 Table 3.2 Pre-Operational Environmental TLD Measurements Net Exposure in mR/Standard Quarter (91 days)

Annual Ist 2nd 3rd 4th Ave.

Quarter Quarter Quarter Quarter Exp. Exp.

1982 Mean of Indicators 17.1 18.1 17.5 17.6 Mean of Controls 16.9 18.1 17.9 16.8 1983 Mean of Indicators 16.7 17.1 18.8 17.9 17.6 Mean of Controls 16.9 17.5 18.7 18.4 17.9 1984 Mean of Indicators 16.1 17.1 16.9 17.5 17.0 Mean of Controls 17.6 17.4 15.8 18.7 17.4 1985 Mean of Indicators 16.9 18.0 18.9 16.1 17.4 Mean of Controls 16.8 17.7 18.9 16.1 17.4 1986 Mean of Indicators 14.0 15.5 15.3 15.0 15.0 Mean of Controls 13.9 18.0 16.8 15.1 16.0 1987 Mean of Indicators 12.7 14.8 15.0 14.4 14.2 Mean of Controls 13.0 14.8 15.3 15.0 14.6 1988 Mean of Indicators 13.5 14.1 14.7 14.9 14.3 Mean of Controls 13.3 14.4 18.1 14.6 15.1 1989 Mean of Indicators 14.4 14.3 14.4 Mean of Controls 14.0 14.4 14.2 All Pre-Operational Mean of Indicators 14.9 16.0 16.8 16.2 15.9 Mean of Controls 15.1 16.4 17.4 16.5 16.2 FIGURE 3.6 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 t-mm 20.0 -- 20.0 o-E 10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007

--* TL-01 Brimmer's Lane

-e--TL-02 Landing Road

-A--TL-03 Glade Path

-- X-TL-04 Island Path

-i---TL-05 Harbor Road FIGURE 3.6.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 S20 20 E

10ý 10 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

TL-01 Brimmer's Lane

-e-TL-02 Landing Road A TL-03 Glade Path

-e-TL-04 Island Path

-x--TL-05 Harbor Road FIGURE 3.7 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 a) 20.0 20.0 a-10 10.0 10.0 0.0 0.0 Qtr-1 Qtr-2 Qtr-3 Qtr-4 2007 E- TL-06 Barge Landing

--e--TL-07 Cross Road

-*--TL-08 Farm Lane

--- TL-09 Farm Lane

-X- TL-10 Site Boundary FIGURE 3.7.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 - 40 30 30 tf 20 -x 20 xx E

10 1 10 [] 10 0 1 1 19 19 2 2 2 2006 0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-TL-06 Barge Landing

-e-TL-07 Cross Road

-A--TL-08 Farm Lane

-$--TL-09 Farm Lane

-x- TL-10 Site Boundary FIGURE 3.8 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 CD a 20.0 20.0 E

10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007

--- TL-11 Site Boundary

-e-TL-12 Site Boundary

--*-TL-13 Inside Site Boundary

-e- TL-14 Trailer Park

-x-- TL-15 Brimmer's Lane FIGURE 3.8.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 ai) 20 - 20 a)

E 10 /0 10 1K 0

1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 TL-1 1 Site Boundary

-e--TL-12 Site Boundary

TL-13 Inside Site Boundary

--- TL-14 Trailer Park

-K-- TL-15 Brimmer's Lane FIGURE 3.9 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 cu 20.0 20.0 0*

E 10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007

-E-TL-16 Brimmer's Lane

-e-TL-17 South Road

-*-TL-18 Mill Road

-*- TL-19 Appledore Avenue

-+-TL-20 Ashworth Avenue FIGURE 3.9.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 -40 30 30

~20 - ~ ,X X Xx 20 101 10 + 10 0 i I I I I tI I 1 0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 TL-16 Brimmer's Lane

-- .---TL-17 South Road

--A- TL-18 Mill Road

-*- TL-1 9 Appledore Avenue

-x- TL-20 Ashworth Avenue FIGURE 3.10 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 20.0 20.0 U,

E 10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007 TL-21 Route 1A

-e-TL-22 Cable Avenue

--- TL-23 Ferry Road

-e-TL-24 Ferry Lots Lane

-- TL-25 Elm Street FIGURE 3.10.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 tfa) 20 20 0~0 E

10 -10 0 ' I I I I I I I I IO0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-r-TL-21 Route 1A TL-22 Cable Avenue

.TL-23 Ferry Road

-e- TL-24 Ferry Lots Lane

-X- TL-25 Elm Street FIGURE 3.11 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 20.0 20.0 L. .

10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007 E3-TL-26 Route 107A o---TL-27 Highland Street

-A-TL-28 Route 150

-e--TL-29 Frying Pan Lane

-X-TL-30 Route 27 FIGURE 3.11.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 a,

020 20 w,[ 00 0~0 Q, E x X 10 j1 10 0 i1 i i i 1 1 0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-E- TL-26 Route 107A

-- o TL-27 Highland Street

--A---- TL-28 Route 150

-'-- TL-29 Frying Pan Lane

-x-TL-30 Route 27 FIGURE 3.12 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 a)

E 10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007

-*-TL-31 Alumni Drive

-e--TL-32 SB Elementarty School

TL-33 Dock Area

TL-34 Bow Street

-X-TL-35 Lincoln Ackerman School FIGURE 3.12.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 Ca1-0

" 20 -20 a)

E 10 -10 0I I I i I I I I I I 110 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

-- 3TL-31 Alumni Drive

-e-TL-32 SB Elementary School

-A--TL-33 Dock Area

TL-34 Bow Street

-X-TL-35 Lincoln Ackerman School FIGURE 3.13 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 L. 20.0 X -- 20.0 U) 10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007

-B-- TL-36 Route 97 (Control)

TL-37 Plaistow, NH (Control)

TL-38 Hampstead NH (Control)

-*-TL-39 Fremont, NH (Control)

-*- TL-40 Newmarket, NH (Control)

FIGURE 3.13.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 a) AAA t:

cu 20 - / Aý 40 20 XA x 10 10 0198 1 I I I I I 200 I 0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 TL-36 Route 97 (Control)

-- TL-37 Plaistow, NH (Control)

TL-38 Hampstead NH (Control)

--- TL-39 Fremont, NH (Control)

-x--TL-40 Newmarket, NH (Control)

FIGURE 3.14 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40.0 40.0 30.0 30.0 ci) 20.0 20.0 a)

E 10.0 10.0 0.0 0.0 Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 2007

TL-41 Portsmouth, NH (Control)

-e- TL-42 Ipswich, MA (Control)

-A- TL-43 Rocks Road Landing

--e--TL-44 SB Education Center

-- X TL-45 Hampton Fire Station

--- TL-46 SB Beach Police Station

-t--TL-47 Hampton Falls, Route 84 FIGURE 3.14.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30 30 (D

-tf L 20 - 20 E

101 10 0 . i . I i i i 0 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

--- TL-41 Portsmouth, NH (Control)

TL-42 Ipswich, MA (Control)

-A--TL-43 Rocks Road Landing

-TL-44 SB Education Center

-x-TL-45 Hampton Fire Station

.- TL-46 SB Beach Police Station

-+-TL-47 Hampton Falls, Route 84 4.0 Program Deviations and Reporting 4.1 Sampling Program Deviations Table A.9.1-1 of the Offsite Dose Calculation Manual (ODCM) allows for deviations in the REMP sampling schedule "ifspecimens are unobtainable due to circumstances such as hazardous conditions, seasonal unavailability and malfunction of automatic sampling equipment." All deviations from the sampling schedule shall be documented each year in the Radiological Environmental Operating Report. The deviations for 2007 are as follows:

On 1/3/2007, air sampling station AP/CF-04 [on-site Plate Yard] lost power for approximately 8.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months due to a blown fuse, thereby failing to "continuously" collect a sample. The situation was corrected when the fuse was replaced and the power restored to the unit. The out of service time was minimal and did not impact the ability to collect sufficient sample volume.

On 2/14/2007, air sampling station AP/CF-02 [Hampton Marina, Hampton, NH] lost power for approximately 18.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months due to a blown fuse, thereby failing to "continuously" collect a sample.

The situation was corrected when the fuse was replaced and the power restored to the unit. The out of service time was minimal and did not impact the ability to collect sufficient sample volume.

" On 3/5/2007, a scheduled quarterly fish sample collection (ODCM only requires semi-annual collection) from the control location, FH-53, in Ipswich, MA was unable to be obtained for the first quarter period due the lack of available fish catch during the time period. This does not impact the minimum program requirement for semi-annual collections which were satisfied in subsequent collections in 2007.

" On 3/14/2007, the milk sample from station TM-23 could not be collected as scheduled. The owner has sold the milk producing cows and will no longer be supplying milk for the REMP. The alternate broad leaf sampling program as a substitute for insufficient number of milk sampling locations had been implemented prior to this event as result of declining milk availability in the site area.

" On 4/3/2007, the REMP TLD located on Elm Street, Amesbury, MA (TL-25) was found missing (loss of first quarter, 2007 results) during the quarterly change out. The second quarter replacement TLD was placed in the field at this location to continue data collection as required by the REMP.

" On 8/3/2007, air sampling station AP/CF-01 [Barge landing area, Seabrook, NH] lost power for approximately 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , 12 minutes due to a fault in GFCI breaker, thereby failing to "continuously" collect a sample. The situation was corrected when a new GFCI was replaced and the power restored to the unit. The out of service time was minimal and did not impact the ability to collect sufficient sample volume.

On 11/2/2007, air sampling station AP/CF-04 [On-site Plate Yard] lost power for 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , 22 minutes as a result of local power being removed to permit unrelated yard utility work to be performed in a safe manner, thereby failing to "continuously" collect a sample. The air sampler was placed back in service when the power was restored to the unit. The out of service time was minimal and did not impact the ability to collect sufficient sample volume.

" On 11/28/2007, air sampling station AP/CF-04 [On-site Plate Yard] lost power for 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months , 35 minutes as a result of local power being removed to permit unrelated yard utility work to be performed in a safe manner, thereby failing to "continuously" collect a sample. The air sampler was placed back in service when the power was restored to the unit. The out of service time was minimal and did not impact the ability to collect sufficient sample volume 4.2 Comparison Of Achieved LLDs With Requirements Table A.9.1-2 of the ODCM indicates the required Lower Limits of Detection (LLDs) for environmental sample analyses. (This table is duplicated in Table 4.1 of this report.) Occasionally an LLD is not achievable due to a situation such as a low sample volume caused by sampling equipment malfunction.

In such a case, ODCM Table A.9.1-2 requires a discussion of the situation in the annual Radiological Environmental Operating Report. At the AREVA NP Environmental Laboratory (E-LAB), the target LLD for any analysis is typically 30-40 percent of the most restrictive required LLD. Expressed differently, the typical sensitivities achieved for each analysis are at least 2.5 to 3 times greater than that required by the Seabrook ODCM.

For each analysis having an LLD requirement in ODCM Table A.9.1-2, the a posteriori(after the fact) LLD, or Minimum Detectable Concentration (MDC) calculated for that analysis was compared with the required LLD. During 2007, 1462 analyses had an LLD requirement listed in Table 4.1. During 2007, no LLD's were missed.

4.3 Comparison of Results Against Reporting Levels Seabrook Station ODCM Section 10.1 requires the notification of the NRC by special report within 30 days of receipt from the environmental laboratory whenever a Reporting Level in Table 4.2 is exceeded.

Reporting Levels are the environmental concentrations that relate to the ALARA design dose objectives of 10 CFR 50, Appendix I. It should be noted that environmental concentrations are averaged over calendar quarters for the purposes of this comparison, and that Reporting Levels apply only to measured levels of radioactivity due to plant effluents. During 2007, no Reporting Levels were exceeded.

Table 4.1 DETECTION CAPABILITIES FOR ENVIRONMENTAL SAMPLE ANALYSISa Lower Limit of Detection (LLD)

Fish and Water Airborne Particulate or Invertebrates Milk Food Products Sediment Analysis (pCi/kg) Gas (pCi/kg, wet) (pCi/kg, wet) (pCi/kg) (pCi/kg, wet) (pCi/kg, dry)

Gross Beta 4 0.01 H-3 3,000 Mn-54 15 130 Fe-59 30 260 Co-58, 60 15 130 Zn-65 30 260 Zr-Nb-95 15c 1-131 15 0.07 1 60 Cs-1 34 15 0.05 130 15 60 150 Cs-1 37 18 0.06 150 18 80 180 Ba-La-1 40 15 15

a. Reference Seabrook Station ODCM, Table A.9.1-2 for clarifications Table 4.2 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLESb Analysis Water Airborne Particulate or Gas Fish and Milk Food Products (pCi/kg) (pCi/kg, wet) Invertebrates (pCi/kg) (pCi/kg, wet)

(pCi/kg, wet)

H-3 30,000**'

Mn-54 1,000 30,000 Fe-59 400 10,000 Co-58 1,000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-Nb-95 400*

1-131 100 0.9 3 100"*

Cs-134 30 10 1,000 60 1,000 Cs-1 37 50 20 2,000 70 2,000 Ba-La-140 200* 300*

Parent only.

- Broad leaf vegetation only.

- - Plant de-watering reporting level = 20,000-pCi/kg (2E-05 uCi/mI)

b. Reference Seabrook Station ODCM Table A.9.1-3 for clarifications.

5.0 QUALITY ASSURANCE PROGRAM The quality assurance program at the AREVA NP Environmental Laboratory (E-LAB) is designed to serve two overall purposes: 1) Establish a measure of confidence in the measurement process to assure the licensee, regulatory agencies and the public that analytical results are accurate and precise; and 2) Identify deficiencies in the sampling and/or measurement process to those responsible for these operations so that corrective action can be taken. Quality assurance is applied to all steps of the measurement process, including the collection, measurement and reporting of data, as well as the record keeping of the final results.

Quality control, as part of the quality assurance program, provides a means to control and measure the characteristics of the measurement equipment and processes, relative to established requirements.

The E-LAB employs a comprehensive quality assurance program designed to monitor the quality of analytical processing to ensure reliable environmental monitoring data. The program includes the use of controlled procedures for all work activities, a nonconformance and corrective'action tracking system, systematic internal audits, audits by external groups, a laboratory quality control program, and a staff training program.

Monitoring programs include the Intralaboratory Quality Control Program administered by the Laboratory QA Officer and a third party cross check program administered by Analytics, Inc. Together these programs are targeted to supply QC/QA sources at 5% of the client sample analysis load. In addition, a blind duplicate program is conducted through client environmental monitoring programs.

This summary reports all intralaboratory and third party results received by the E-LAB on or before December 31, 2007.

5.1 Intralaboratory Quality Control Program The E-LAB QA Officer administers an extensive intralaboratory quality control program in which process check samples are submitted for analysis. These samples are "spiked" with a known amount of radioactive material and are routinely submitted in triplicate to evaluate the bias and precision of a measurement process. Additionally, numerous samples of various matrices are periodically re-analyzed as part of the internal duplicate analysis program. Table 5.1 provides the summary of the process check and duplicates results for January to December 2007. Of the 469 analyses evaluated for bias, 99.4% passed the acceptance criteria and 99.3% of the 148 results evaluated for precision were acceptable. The E-LAB internal acceptance criteria are summarized at the end of Table 5.1.

5.2 Third Party Cross Check Program The E-LAB participates in a third party cross check program managed by Analytics Inc. to satisfy the requirement of the Environmental Technical Specification/ODCM. The E-LAB Analytics program was originally used to augment the EPA Intercomparison Program that it now replaces. The current program is designed to be comparable to the 4th pre-1996 EPA 206 PE Program terin terms of the number of samples, matrices and nuclides. The results for the 4 quarter 2006 through the 3rd quarter 2007 are summarized in Table 5.2.

The 4th quarter 2007 sample results are not included in this report as the final results have not been received from the reporting laboratory. This data will be provided in the Quality Assurance Program summary for the next annual report. Each sample is normally analyzed in triplicate and the results are evaluated against the internal acceptance criteria described in the E-LAB Manual 100-Laboratory Quality Assurance Plan. This acceptance protocol is used for all interlaboratory programs with no pre-set acceptance criteria. When results fall outside of the acceptance criteria, an investigation is initiated to determine the cause of the problem and if appropriate, corrective measures are taken. The E-LAB internal acceptance criteria are summarized at the end of Table 5.1.

5.3 Blind Duplicate Program Under the Blind Duplicate Quality Assurance Program, samples are split from homogeneous environmental media by the client and sent to the E-LAB for analysis. They are "blind" in that the identification of the matching sample is not identified to the Laboratory.

Participating clients submitted a total of 12 paired samples consisting of water, algae, and mussels in 2007.

The measurements evaluated include twenty-six gamma emitting radionuclides, H-3, and gross beta. All measurements are evaluated, whether the results are statistically positive or not, and whether the net concentration is positive or negative.

The samples submitted as part of this program are listed in Table 5.3. For the 2007 program, 100%

(212/212) of the measurements met the E-LAB internal acceptance criteria.

5.4 Environmental TLD Quality Assurance Program Performance documentation of the routine processing of the Panasonic environmental TLDs (thermoluminescent dosimeter) program at the E-LAB is provided by the dosimetry quality assurance testing program. In 2007, the program included internal performance testing conducted by the Laboratory QA Officer. Sets of six dosimeters were irradiated to ANSI specified testing criteria and submitted for processing as "unknowns." The bias and precision of TLD processing is measured against this standard and is used to indicate trends and changes in performance. Instrumentation checks, although routinely performed and representing between 5-10% of the TLDs processed, are not presented in this report because they do not represent a true process check sample since the exposures are known to the processor.

Eighty-four performance tests were conducted in 2007 by the E-LAB. These tests were made on fourteen separate sets of six dosimeters. All of the fourteen TLD test sets passed the mean bias criteria of +/-20.1%.

Of the eighty-four individual measurements, 100% of the dosimeter evaluations met the E-LAB Internal Acceptance Criteria for bias (+/-20.1%) and precision (+/-12.8%).

Percentage of Individual Analyses that passed E-LAB Internal Criteria Dosimeter Type Number % Passed Bias Criteria % Passed Precision Criteria Tested Panasonic Environmental 84 100 100 TABLE 5.1 E-LAB RESULTS IN THE INTRALABORATORY PROCESS CONTROL PROGRAM January - December 2007 Media,. Bias.Criteria (1) Precision Criteria (2)

Analysis . 1. 2 3 4 1 2 3 4 I. Air Charcoal Gamma-Quantitative 94 27 5 0 0 0 0 0 Gamma-Screening 0 0 0 0 0 0 0 0 I1. Air Filter Beta 229 19 1 0 0 0 0 0 I1l. Milk Gamma 0 0 0 0 8 2 8 0 1-131(LL) 4 0 1 0 4 0 1 0 IV. Soil/Sediment Gamma 2 5 1 0 0 0 0 0 V. Vegetation/Food Gamma 0 0 0 0 16 3 20 0 VI. Water Gross Alpha 3 3 1 1 3 2 2 0 Gross Beta 7 3 1. 0 4 2 1 1 Gamma 14 9 1 0 6 4 22 0 1-131(LL) 0 0 0 0 0 0 0 0 Sr-90 4 2 5 0 4 2 4 0 Tritium 10 13 2 2 13 5 11 0 Total Number in 367 81 18 3 58 20 69 1 Range Percentage of Total 78.3 17.3 3.8 0.6 39.2 13.5 46.6 0.7 Processed

-Sum of Analyses 469 148 (1) Percent Bias Criteria by Bias Category (2) Percent Precision Criteria by Precision Category Bias Category = 1 > 0% and < = 5% Precision Category = 1 > 0% and < = 5%

Bias Category = 2 > 5% and < = 10% Precision Category = 2 > 5% and < = 10%

Bias Category = 3 > 10% and < = 15%, or Precision Category 3 > 10% and < = 15%, or Within 2 sigma of known within 2 sigma of mean Gross alpha/beta water, Sr 89/90 > 10% and < = 2, 5% Precision Category = 4 Outside Criteria Transuranics > 10% and < = 20%

Bias Category = 4 Outside Criteria TABLE 5.2 E-LAB RESULTS IN THE ANALYTICS INC. CROSS CHECK PROGRAM Quarter 4, 2006 - Quarter 3, 2007 Sample Quraml pe p I .&..m Reported Known. ELB Number Yer_ Mbdii Nulgijde Vajlue, .a tisEauion E5222-162 4th/2006 Water H-3 14570 14800 0.99 Agreement E5223-162 4th/2006 Water Sr-89 68.8 72.6 0.95 Agreement E5223-162 4th/2006 Water Sr-90 5.56 5.9 0.94 Agreement E5224-162 4th/2006 Filter Gross Alpha 63.3 67.2 0.94 Agreement E5224-162 4th/2006 Filter Gross Beta 209.6 203 1.03 Agreement E5225-162 4th/2006 Filter Ce-141 179.0 185 0.97 Agreement E5225-162 4th/2006 Filter Cr-51 277.9 273 1.02 Agreement E5225-162 4th/2006 Filter Cs-134 89.1 92.7 0.96 Agreement E5225-162 4th/2006 Filter Cs-137 158.8 149 1.06 Agreement E5225-162 4th/2006 Filter Co-58 54.0 52.8 1.02 Agreement E5225-162 4th/2006 Filter Mn-54 71.2 69.8 1.02 Agreement E5225-162 4th/2006 Filter Fe-59 51.0 50.2 1.02 Agreement E5225-162 4th/2006 Filter Zn-65 104.3 103 1.01 Agreement E5225-162 4th/2006 Filter Co-60 166.7 177 0.94 Agreement E5226-162 4th/2006 Filter Sr-89 69.5 74.2 0.94 Agreement E5226-162 4th/2006 Filter Sr-90 6.46 6.06 1.07 Agreement E5227-162 4th/2006 Milk 1-131LL 71.0 70.8 1.00 Agreement E5227-162 4th/2006 Milk 1-131 64.8 70.8 0.91 Agreement E5227-162 4th/2006 Milk Ce-141 277.7 294 0.94 Agreement E5227-162 4th/2006 Milk Cr-51 430.7 433 0.99 Agreement E5227-162 - 4th/2006 Milk Cs-134 141.4 147 0.96 Agreement E5227-162 4th/2006 Milk Cs-137 233.9 237 0.99 Agreement E5227-162 4th/2006 Milk Co-58 83.1 83.8 0.99 Agreement E5227-162 4th/2006 Milk Mn-54 110.6 111 1.00 Agreement E5227-162 4th/2006 Milk Fe-59 82.3 79.7 1.03 Agreement E5227-162 4th/2006 Milk Zn-65 171.4 164 1.05 Agreement E5227-162 4th/2006 Milk Co-60 273.1 281 0.97 Agreement E5228-162 4th/2006 Charcoal 1-131 84.2 87.1 0.97 Agreement pCi/Liter (Filters in pCi)

TABLE 5.2 (cont'd)

E-LAB RESULTS IN THE ANALYTICS INC. CROSS CHECK PROGRAM Quarter 4, 2006 - Quarter 3, 2007 Ratio Sample Quarteel 'ampie Reported! Know E-LAB/

Numnber iea--r', , Media. Nuclide Value _ Vajub' .Aftalytics _ Evaluation.

E5238-162 1st/2007 Water Gross Alpha 117 112 1.05 Agreement E5238-162 1st/2007 Water Gross Beta 104 100 1.04 Agreement E5239-162 1st/2007 Water 1-131LL 88.3 89.8 0.98 Agreement E5239-162 1st/2007 Water 1-131 74.3 89.8 0.83 Agreement E5239-162 1st/2007 Water Ce-141 257 258 1.00 Agreement E5239-162 1st/2007 Water Cr-51 218 213 1.02 Agreement E5239-162 1st/2007 Water Cs-134 93.6 97.1 0.96 Agreement E5239-162 lst/2007 Water Cs-137 197 204 0.97 Agreement E5239-162 1st/2007 Water Co-58 86.2 85.8 1.00 Agreement E5239-162 1st/2007 Water Mn-54 155 158 0.98 Agreement E5239-162 1st/2007 Water Fe-59 87.1 91.7 0.95 Agreement E5239-162 1st/2007 Water Zn-65 886 869 1.02 Agreement E5239-162 1st/2007 Water Co-60 131 132 0.99 Agreement E5240-162 lst/2007 Water Sr-89 127 137 0.92 Agreement E5240-162 lst/2007 Water Sr-90 9.39 9.99 0.94 Agreement E5241-162 1st/2007 Charcoal 1-131 67.6 70.2 0.96 Agreement E5242-162 1st/2007 Filter Gross Alpha 67.2 69.1 0.97 Agreement E5242-162 Ist/2007 Filter Gross Beta 69.4 61.9 1.12 Agreement E5243-162 1st/2007 Milk 1-131 LL 85.1 85.2 1.00 Agreement E5243-162 1st/2007 Milk 1-131 75.4 85.2 0.88 Agreement E5243-162 Ist/2007 Milk Ce-141 294 297 0.99 Agreement E5243-162 1st/2007 Milk Cr-51 226 245 0.92 Agreement E5243-162 lst/2007 Milk Cs-134 104 112 0.93 Agreement E5243-162 1st/2007 Milk Cs-137 228 234 0.97 Agreement E5243-162 1st/2007 Milk Co-58 98.1 98.8 0.99 Agreement E5243-162 1st/2007 Milk Mn-54 184 182 1.01 Agreement E5243-162 1st/2007 Milk Fe-59 109 106 1.03 Agreement E5243-162 1st/2007 Milk Zn-65 1041 1000 1.04 Agreement E5243-162 1st/2007 Milk Co-60 148 152 0.98 Agreement E5244-162 1st/2007 Milk Sr-89 126 137 0.92 Agreement E5244-162 1st/2007 Milk Sr-90 8.85 10 0.88 Agreement

pCi/Liter (Filters in pCi)

TABLE 5.2 (cont'd)

E-LAB RESULTS IN THE ANALYTICS INC. CROSS CHECK PROGRAM Quarter 4, 2006 - Quarter 3, 2007 Sample :Quarer. ' Sahple . oR0e* d Known EI.BJ Numiber, 2 ad Media,-.I Nulide,m . - Vaue . _Iy -- ti I ... E*_aI.uaPtioi, E5334-162 2nd/2007 Water H-3 8520 9040 0.94 Agreement E5335-162 2nd/2007 Filter Gross Alpha 122.7 125 0.98 Agreement E5335-162 2nd/2007 Filter Gross Beta 137.9 122 1.13 Agreement E5335-162 2nd12007 Filter Ce-141 94.1 107 0.88 Agreement E5335-162 2nd/2007 Filter Cr-51 230 273 0.84 Non-Agreement (1)

E5335-162 2nd/2007 Filter Cs-134 114.3 129 0.89 Agreement E5335-162 2nd/2007 Filter Cs-137 86.3 90.1 0.96 Agreement E5335-162 2nd/2007 Filter Co-58 98.4 106 0.93 Agreement E5335-162 2nd/2007 Filter Mn-54 83.3 88.5 0.94 Agreement E5335-162 2nd/2007 Filter Fe-59 79 89.0 0.89 Agreement E5335-162 2nd/2007 Filter Zn-65 167 178 0.94 Agreement E5335-162 2nd/2007 Filter Co-60 112 127 0.89 Agreement E5337-162 2nd/2007 Filter Sr-89 71.4 91.2 0.78 Agreement E5337-162 2nd/2007 Filter Sr-90 10.1 12.4 0.82 Agreement E5338-162 2nd/2007 Milk I-131 LL 73.5 70.1 1.05 Agreement E5338-162 2nd/2007 Milk 1-131 75 70.1 1.07 Agreement E5338-162 2nd/2007 Milk Ce-141 168 200 0.84 Non-Agreement (2)

E5338-162 2nd/2007 Milk Cr-51 447 512 0.87 Agreement E5338-162 2nd/2007 Milk Cs-134 223 242 0.92 Agreement E5338-162 2nd/2007 Milk Cs-137 165 169 0.98 Agreement E5338-162 2nd/2007 Milk Co-58 203 198 1.02 Agreement E5338-162 2nd/2007 Milk Mn-54 178 166 1.07 Agreement E5338-162 2nd/2007 Milk Fe-59 170 167 1.02 Agreement E5338-162 2nd/2007 Milk Zn-65 343 334 1.03 Agreement E5338-162 2nd/2007 Milk Co-60 238 238 1.00 Agreement

pCi/Liter (Filters in pCi)

(1) Cr-51 on filter outside of acceptance limit. CR 08-02 generated.

(2) Ce-141 in milk outside of acceptance limit. CR 08-02 generated.

TABLE 5.2 (cont'd)

E-LAB RESULTS IN THE ANALYTICS INC. CROSS CHECK PROGRAM Quarter 4, 2006 - Quarter 3, 2007 7 ~Ratioi Sample Quartel SamIple Reported Known . E-LABI Numberý' _ eWMdia 'Nucilde Valuer Value Aalytics' Evaluation, E5430-162 3rd /2007 Water Gross Alpha 112 109 1.03 Agreement E5430-162 3rd /2007 Water Gross Beta 218 214 1.02 Agreement E5431-162 3rd/2007 Water 1-131 LL 83.4 80.1 1.04 Agreement E5431-162 3rd/2007 Water 1-131 80.2 80.1 1.00 Agreement E5431-162 3rd /2007 Water Ce-141 176 182 0.97 Agreement E5431-162 3rd /2007 Water Cr-51 228 249 0.92 Agreement E5431-162 3rd /2007 Water Cs-1 34 111 127 0.87 Agreement E5431-162 3rd /2007 Water Cs-137 112 112 1.00 Agreement E5431-162 3rd /2007 Water Co-58 94.3 98.1 0.96 Agreement E5431-162 3rd /2007 Water Mn-54 141 144 0.98 Agreement E5431-162 3rd /2007 Water Fe-59 94.8 95.1 1.00 Agreement E5431-162 3rd /2007 Water Zn-65 186 174 1.07 Agreement E5431-162 3rd /2007 Water Co-60 120 127 0.94 Agreement E5432-162 3rd /2007 Charcoal 1-131 66.5 69.6 0.96 Agreement E5433-162 3rd /2007 Filter Gross Alpha 86.4 105 0.82 Non-Agreement (31 E5433-162 3rd /2007 Filter Gross Beta 207 213 0.97 Agreement E5434-162 3rd/2007 Milk 1-131LL 87.2 85.2 1.02 Agreement E5434-162 3rd /2007 Milk 1-131 82.9 85.2 0.97 Agreement E5434-162 3rd/2007 Milk Ce-141 196 211 0.93 Agreement E5434-162 3rd /2007 Milk Cr-51 282 289 0.97 Agreement E5434-162 3rd /2007 Milk Cs-134 141 147 0.96 Agreement E5434-162 3rd /2007 Milk Cs-1 37 126 131 0.96 Agreement E5434-162 3rd /2007 Milk Co-58 ill 114 0.97 Agreement E5434-162 3rd /2007 Milk Mn-54 171 168 1.02 Agreement E5434-162 3rd /2007 Milk Fe-59 112 ill 1.01 Agreement E5434-162 3rd /2007 Milk Zn-65 212 202 1.05 Agreement E5434-162 3rd /2007 Milk Co-60 145 148 0.98 Agreement E5435-162 3rd /2007 Milk Sr-89 89.2 94.9 0.94 Agreement E5435-162 3rd /2007 Milk Sr-90 12.9 13.1 0.98 Agreement pCi/Liter (Filters in pCi)

(3) Gross alpha on filter outside of acceptance limit. CR 08-01 Generated.

TABLE 5.3

SUMMARY

OF BLIND DUPLICATE SAMPLES January - December 2007 TYPE OF SAMPLE NUMBER OF PAIRED SAMPLES SUBMITTED Water 8 Algae 2 Mussels 2 TOTAL 12 6.0 Land Use Census The Offsite Dose Calculation Manual (ODCM Control 9.2.1) requires that a Land Use Census be conducted annually to identify the location of the nearest residence, milk animal and nearest garden of greater than 50 square meters producing broad leaf vegetation in each of the 16 meteorological sectors within five miles of the plant. The 2007 census was completed in accordance with the requirements of the ODCM. In 2007, a global positioning system was used to determine locations in the off-site environs with respect to the center of the site (Unit 1 Containment).

The nearest resident, garden and milk animal locations identified in the 2007 Land Use Census and their distances are shown in Table 6.1. The annual census indicated there was one change in distance of the nearest resident (NW sector) from those identified in the previous year's census. One new garden location (South sector) was noted as a change from the 2006 census, but the distance from the Containment Building only differed by a few meters from the 2006 distance. No changes in the milk animal locations were identified in the 2007 land use census for locations within 5 miles (8 km). However, one exisiting REMP milk sample location outside the 5 mile radius (TM-23 @ 12 km south) was reported to have gone out of business in 2007.

The results of this year's census also showed that the sampling locations used in the REMP continue to have the highest calculated dose commitments of available locations. In 2007, broad leaf vegetation continued as part of the sample collection and analysis program due to the absence of sufficient milk producing locations to provide REMP samples. Sampling locations for broad leaf vegetation are at the site boundary near points of highest predicted D/Q. This option continues, as opposed to public owned vegetable gardens located by the land use census, in order to ensure adequate availability of samples for REMP analysis from locations with the highest potential for detecting plant effluents.

Table 6.1 2007 Land Use Census Results (Within 5 Miles)

Sector (kin) (km) (km)

N 3.5 4.0 NNE 3.0 3.0 8.1l NE 2.9 3.5 ENE 2.3 E 2.6 ESE 2.7 SE 2.4 4.2 SSE 1.6 S 1.2 1.2a SSW 1.1 1.4 SW 1.1 1.8 WSW 1.9 2.3 W 1.3 1.4 WNW 1.1 1.5 NW 1.2a 1.3 6.9 NNW 1.0 1.0 5.3 a New in 2007.

bMilk location located just beyond the 8 km maximum inventory distance limit of ODCM Table A.9.1-1.

Sample Analysis Data List for 2007

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE END CONC STD.DEV. MDC TYPE STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

AL 5 L12456-01 5/22/2007 AcTh-228 -1,40E+01 2.40E+01 1.OOE+02 AL 5 L12456-01 5/22/2007 Ag-108m 3.80E+00 4.70E+00 1.70E+01 AL 5 L12456-01 5/22/2007 Ag-li0m 1.00E+00 1.1 OE+0 I 4.30E+01 AL 5 L12456-01 5/22/2007 Ba-140 -9.OOE+00 1.60E+01 8.60E+01 AL 5 L12456-01 5/22/2007 Be-7 1.81E+02 7.1OE+0I 2.1OE+02 AL 5 L12456-01 5/22/2007 Ce-141 -1.02E+01 9.70E+00 3.70E+01 AL 5 L12456-01 5/22/2007 Ce- 144 -7.20E+01 2.OOE+01 9.1OE+01 AL 5 L12456-01 5/22/2007 Co-57 3.90E+00 2.90E+00 9.80E+00 AL 5 L12456-01 5/22/2007 Co-58 9.70E+00 8.70E+00 3.00E+01 AL 5 L12456-01 5/22/2007 Co-60 8.OOE+00 1.10E+01 3.80E+01 AL 5 L12456-01 5/22/2007 Cr-51 -7.OOE+01 6.40E+I01 2.60E+02 AL 5 L12456-01 5/22/2007 Cs-134 9.10E+00 8.20E+00 2.80E+01 AL 5 L12456-01 5/22/2007 Cs-137 -3.OOE+00 6.40E+00 2.60E+01 AL 5 L12456-01 5/22/2007 Fe-59 -1.00E+01 2.20E+01 9.10E+01 AL 5 L12456-01 5/22/2007 1-131 2.50E+01 2.90E+01 1.00E+02 AL 5 L12456-01 5/22/2007 K-40 7.79E+03 4.50E+02 3.50E+02 AL 5 L12456-01 5/22/2007 La-140 -1.10E+01 1.90E+01 9.90E+01 AL 5 L12456-01 5/22/2007 Mn-54 -5.OOE+00 8.80E+00 3.50E+01 AL 5 L12456-01 5/22/2007 Nb-95 -2.20E+01 1.20E+01 5.30E+01 AL 5 L12456-01 5/22/2007 Ru-103 -3.30E+00 8.60E+00 3.40E+01 AL 5 L12456-01 5/22/2007 Ru-106 5.1OE+01 5.70E+01 2.OOE+02 AL 5 L12456-01 5/22/2007 Sb-124 -1.70E+01 1.70E+01 8.90E+01 AL 5 L12456-01 5/22/2007 Sb-125 -3.OOE+00 1.50E+01 5.70E+01 AL 5 L12456-01 5/22/2007 Se-75 4.1OE+00 5.80E+00 2.10E+01 AL 5 L12456-01 5/22/2007 Zn-65 9.OOE+00 2.10E+01 7.70E+01 AL 5 L12456-01 5/22/2007 Zr-95 -1.60E+01 1.50E+01 6.50E+01

,AL 5 L13303-01 11/26/2007 AcTh-228 1.30E+01 3.OOE+01 1.1 OE+02 AL 5 L13303-01 11/26/2007 Ag-108m -1.00E+01 5.70E+00 2.40E+01 AL 5 L13303-01 11/26/2007 Ag-Il0m -1.70E+01 1.20E+01 5.00E+01 AL 5 L13303-01 11/26/2007 Ba-140 -7.OOE+00 1.90E+01 8.50E+01 AL 5 L13303-01 11/26/2007 Be-7 1.06E+02 5.80E+01 1.80E+02 AL 5 L13303-01 11/26/2007 Ce-141 -5.60E+00 8.80E+00 3.301E+01 AL 5 L13303-01 11/26/2007 Ce-144 1.00E+00 1.90E+01 7.101E+01 AL 5 L13303-01 11/26/2007 Co-57 -1.90E+00 2.80E+00 1.1 OE+01 AL 5 L13303-01 11/26/2007 Co-58 -1.31E+01 9.60E+00 4.00E+01 AL 5 L13303-01 11/26/2007 Co-60 -4.50E+00 9.30E+00 3.90E+01 AL 5 L13303-01 11/26/2007 Cr-51 3.30E+0I 5.30E+01 1.90E+02 AL 5 L13303-01 11/26/2007 Cs-134 1.27E+01 7.20E+00 2.301E+01 AL 5 L13303-01 11/26/2007 Cs-137 1.87E+01 7.50E+00 2.20E+01 AL 5 L13303-01 11/26/2007 Fe-59 -9.OOE+00 2.30E+01 9.101E+01 AL 5 L13303-01 11/26/2007 1-131 1.30E+01 1.90E+01 6.60E+01 AL 5 L13303-01 11/26/2007 K-40 8.14E+03 4.60E+02 3.80E+02 AL 5 L13303-01 11/26/2007 La-140 -7.OOE+00 1.90E+01 8.50E+01 AL 5 L13303-01 11/26/2007 Mn-54 2.1OE+00 8.20E+00 3.00E+01 AL 5 L13303-01 11/26/2007 Nb-95 -3.OOE+00 1.101E+01 4.30E+0 1 AL 5 L13303-01 11/26/2007 Ru-103 -5.50E+00 6.80E+00 2.80E+01 AL 5 L13303-01 11/26/2007 Ru-106 -4.90E+0 I 4.90E+01 2.1OE+02 AL 5 L13303-01 11/26/2007 Sb-124 -7.OOE+00 1.60E+01 7.90E+01 AL 5 L13303-01 11/26/2007 Sb-125 -1.40E+01 1.80E+01 7.1 OE+0 1 AL 5 L13303-01 11/26/2007 Se-75 -6.10E+00 6.50E+00 2.50E+01 AL 5 L13303-01 11/26/2007 Zn-65 -8.OOE+00 2.60E+01 9.80E+01 AL 5 L13303-01 11/26/2007 Zr-95 -1.20E+01 1.00E+01 4.60E+01 AL 55 L12456-02 5/22/2007 AcTh-228 1.50E+01 2.60E+01 9.40E+01 AL 55 L12456-02 5/22/2007 Ag-108m 9.OOE-01 4.60E+00 1.70E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

AL 55 L12456-02 5/22/2007 Ag-110m -I.10E+01 1.1OE+01 4.40E+01 AL 55 L12456-02 5/22/2007 Ba-140 1.60E+01 1.20E+01 2.20E+01 AL 55 L12456-02 5/22/2007 Be-7 -3.30E+01 6.1OE+01 2.40E+02 AL 55 L12456-02 5/22/2007 Ce-141 1.16E+0 1 8.20E+00 2.70E+01 AL 55 L12456-02 5/22/2007 Ce-144 3.30E+01 2.50E+01 8.20E+01 AL 55 L12456-02 5/22/2007 Co-57 3.60E+00 2.90E+00 9.90E+00 AL 55 L12456-02 5/22/2007 Co-58 -7.60E+00 7.20E+00 3.1OE+01 AL 55 L12456-02 5/22/2007 Co-60 -3.60E+00 7.10E+00 3.10E+01 AL 55 L12456-02 5/22/2007 Cr-51 2.10E+01 7.1OE+01 2.60E+02 AL 55 L12456-02 5/22/2007 Cs-134 1.20E+00 5.30E+00 2.10E+01 AL 55 L12456-02 5/22/2007 Cs-137 1.60E+00 7.20E+00 2.70E+01 AL 55 L12456-02 5/22/2007 Fe-59 5.OOE+00 2.30E+01 8.70E+01 AL 55 L12456-02 5/22/2007 1-131 1.00E+02 3.90E+01 1.20E+02 AL 55 L12456-02 5/22/2007 K-40 4.51E+03 3.30E+02 3.10E+02 AL 55 L12456-02 5/22/2007 La-140 1.90E+01 1.30E+01 2.60E+01 AL 55 L12456-02 5/22/2007 Mn-54 -5.40E+00 5.70E+00 2.50E+01 AL 55 L12456-02 5/22/2007 Nb-95 -7.50E+00 7.90E+00 3.40E+01 AL 55 L12456-02 5/22/2007 Ru-103 5.90E+00 6.60E+00 2.30E+01 AL 55 L12456-02 5/22/2007 Ru-106 -1.59E+02 6.20E+01 2.80E+02 AL 55 L12456-02 5/22/2007 Sb- 124 7.30E+00 7.30E+00 2.OOE+01 AL 55 L12456-02 5/22/2007 Sb-125 3.OOE+00 1.1OE+01 4.20E+01 AL 55 L12456-02 5/22/2007 Se-75 -1.90E+00 5.60E+00 2.20E+01 AL 55 L12456-02 5/22/2007 Zn-65 -8.OOE+00 1.60E+01 6.50E+01 AL 55 L12456-02 5/22/2007 Zr-95 1.40E+01 1.00E+01 3.30E+01 AL 55 L13303-02 11/26/2007 AcTh-228 7.40E+01 3.20E+01 9.60E+01 AL 55 L13303-02 11/26/2007 Ag-108m 8.60E+00 5. 1OE+00 1.70E+01 AL 55 L13303-02 11/26/2007 Ag-110m 5.OOE+00 1.00E+01 3.80E+01 AL 55 L13303-02 11/26/2007 Ba-140 -2.20E+01 1.90E+01 9.40E+01 AL 55 L13303-02 11/26/2007 Be-7 1.66E+02 7.50E+01 2.30E+02 AL 55 L13303-02 11/26/2007 Ce-141 -6.50E+00 8.70E+00 3.30E+01 AL 55 L13303-02 11/26/2007 Ce-144 9.OOE+00 2.70E+01 9.60E+01 AL 55 L13303-02 11/26/2007 Co-57 -3.40E+00 3.50E+00 1.30E+01 AL 55 L13303-02 11/26/2007 Co-58 -2.OOE+00 5.80E+00 2.50E+01 AL 55 L13303-02 11/26/2007 Co-60 -1.30E+01 1.1OE+01 4.60E+01 AL 55 L13303-02 11/26/2007 Cr-51 4.OOE+01 6.40E+01 2.30E+02 AL 55 L13303-02 11/26/2007 Cs-134 1.59E+01 8.1OE+00 2.50E+01 AL 55 L13303-02 11/26/2007 Cs-137 3.70E+00 7.50E+00 2.70E+01 AL 55 L13303-02 11/26/2007 Fe-59 0.OOE+00 2.30E+01 8.70E+01 AL 55 L13303-02 11/26/2007 1-131 -4.OOE+00 2.30E+01 8.50E+01 AL 55 L13303-02 11/26/2007 K-40 5.70E+03 3.90E+02 4.10E+02 AL 55 L13303-02 11/26/2007 La- 140 -2.20E+01 1.90E+01 9.40E+01 AL 55 L13303-02 11/26/2007 Mn-54 7.30E+00 8.OOE+00 2.80E+01 AL 55 L13303-02 11/26/2007 Nb-95 8.50E+00 9.1OE+00 3.20E+01 AL 55 L13303-02 11/26/2007 Ru-103 -1.50E+00 6.60E+00 2.60E+01 AL 55 L13303-02 11/26/2007 Ru-106 -1.87E+02 6.70E+01 3. 1OE+02 AL 55 L13303-02 11/26/2007 Sb- 124 -7.OOE+00 2.OOE+01 8.90E+01 AL 55 L13303-02 11/26/2007 Sb-125 0.OOE+00 1.60E+01 6.10E+01 AL 55 L13303-02 11/26/2007 Se-75 2.20E+00 6.40E+00 2.30E+01 AL 55 L13303-02 11/26/2007 Zn-65 -3.80E+01 2.30E+01 9.70E+01 AL 55 L13303-02 11/26/2007 Zr-95 -2.50E+01 1.50E+01 6.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONG STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 1 Ll 1889-01 1/3/2007 GROSS BETA 1.29E-02 1.30E-03 3.20E-03

AP 1 Ll1936-01 1/17/2007 GROSSBETA 1.57E-02 1.50E-03 3.70E-03

AP 1 L11972-01 '1/31/2007 GROSS BETA 2.13E-02 1.60E-03 3.60E-03

AP 1 L12030-01 2/13/2007 GROSS BETA 2.41E-02 1.70E-03 3.80E-03

AP I L12084-01 2/28/2007 GROSS BETA 1.81E-02 1.50E-03 3.50E-03

AP 1 L12139-01 3/14/2007 GROSS BETA 1.61E-02 1.40E-03 3.30E-03

AP I L12207-01 3/28/2007 GROSS BETA 1.72E-02 1.50E-03 3.90E-03

AP 1 L12268-01 4/11/2007 GROSS BETA 1.05E-02 1.40E-03 3.70E-03

AP 1 L12315-01 3/28/2007 AcTh-228 2.90E-03 1.60E-03 4.80E-03 AP 1 L12315-01 3/28/2007 Ag-108m -6.90E-04 3.1OE-04 1.40E-03 AP 1 L12315-01 3/28/2007 Ag-ll0m -3.90E-04 6.1OE-04 2.70E-03 AP I L12315-01 3/28/2007 Ba-140 -5.10E-03 8.80E-03 4.70E-02 AP I L12315-01 3/28/2007 Be-7 1.25E-01 1.70E-02 3.70E-02 AP I L12315-01 3/28/2007 Ce-141 -9.OOE-04 1.90E-03 7.30E-03 AP 1 L12315-01 3/28/2007 Ce-144 -1.50E-03 2.10E-03 8.10E-03 AP 1 L12315-01 3/28/2007 Co-57 -3.20E-04 2.50E-04 1.00E-03 AP I L12315-01 3/28/2007 Co-58 -1.23E-03 7.70E-04 3.60E-03 AP 1 L12315-01 3/28/2007 Co-60 -4.20E-04 4.40E-04 2.10E-03 AP 1 L12315-01 3/28/2007 Cr-51 -3.OOE-03 1.40E-02 5.50E-02 AP 1 L12315-01 3/28/2007 Cs-134 1.80E-04 3.30E-04 1.30E-03 AP 1 L12315-01 3/28/2007 Cs-137 4.OOE-05 3.40E-04 1.40E-03 AP 1 L12315-01 3/28/2007 Fe-59 -7.OOE-04 2.OOE-03 8.90E-03 AP 1 L12315-01 3/28/2007 1-131 0.OOE+00 4.50E-02 1.70E-01 AP 1 L12315-01 3/28/2007 K-40 -6.OOE-04 6.40E-03 2.60E-02 AP 1 L12315-01 3/28/2007 La-140 -6.OOE-03 1.00E-02 5.40E-02 AP 1 L12315-01 3/28/2007 Mn-54 1.30E-04 3.90E-04 1.50E-03 AP 1 L12315-01 3/28/2007 Nb-95 4.OOE-04 1.50E-03 5.80E-03 AP I L12315-01 3/28/2007 Ru-103 -2.70E-04 9.10E-04 3.90E-03 AP 1 L12315-01 3/28/2007 Ru-106 -7.80E-03 4.40E-03 2.OOE-02 AP 1 L12315-01 3/28/2007 Sb-124 -1.90E-03 *1.30E-03 8.70E-03 AP I L12315-01 3/28/2007 Sb-125 -2.OOE-03 1.00E-03 4.60E-03 AP 1 L12315-01 3/28/2007 Se-75 1.10E-04 6.1OE-04 2.30E-03 AP 1 L12315-01 3/28/2007 Zn-65 -3.40E-04 9.OOE-04 4.10E-03 AP 1 L12315-01 3/28/2007 Zr-95 -1.60E-03 1.20E-03 5.80E-03 AP 1 L12336-01 4/25/2007 GROSS BETA 1.34E-02 1.60E-03 4.40E-03

AP 1 L12400-01 5/9/2007 GROSS BETA 9.50E-03 1.40E-03 3.80E-03 *"

AP I L12461-01 5/23/2007 GROSS BETA 9.50E-03 1.30E-03 3.60E-03

AP I L12512-01 6/6/2007 GROSS BETA 2.12E-02 1.50E-03 3.50E-03

AP 1 L12572-01 6/20/2007 GROSS BETA 1.37E-02 1.40E-03 3.60E-03

AP I L12645-01 7/3/2007 GROSS BETA 3.06E-02 1.90E-03 4.OOE-03

AP 1 L12700-01 7/18/2007 GROSS BETA 1.40E-02 1.30E-03 3.10E-03

AP I L12769-01 8/1/2007 GROSS BETA 1.50E-02 1.40E-03 3.30E-03

AP 1 L12786-01 7/3/2007 AcTh-228 1.30E-03 1.90E-03 7.50E-03

'AP 1 L12786-01 7/3/2007 Ag-108m -2.60E-04 3.1OE-04 1.50E-03 AP 1 L12786-01 7/3/2007 Ag-110m -3.70E-04 8.30E-04 4.OOE-03 AP 1 L12786-01 7/3/2007 Ba-140 3.40E-02 2.40E-02 4.60E-02 AP 1 L12786-01 7/3/2007 Be-7 1.25E-01 2.80E-02 6.70E-02 AP 1 L12786-01 7/3/2007 Ce-141 1.30E-03 3.40E-03 1.20E-02 AP I L12786-01 7/3/2007 Ce-144 1.10E-03 2.80E-03 1.00E-02 AP I L12786-01 7/3/2007 Co-57 1.70E-04 2.80E-04 1.00E-03 AP 1 L12786-01 7/3/2007 Co-58 5.80E-04 9.90E-04 4.OOE-03 AP 1 L12786-01 7/3/2007 Co-60 5.80E-04 6.40E-04 2.40E-03 AP 1 L12786-01 7/3/2007 Cr-51 0.OOE+00 2.40E-02 9.90E-02 AP I L12786-01 7/3/2007 Cs-134 -6.40E-04 3.70E-04 2.50E-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-100-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONG STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 1 L12786-01 7/3/2007 Cs-137 3.OOE-05 7.OOE-04 2.80E-03 AP 1 L12786-01 7/3/2007 Fe-59 1.70E-03 1.70E-03 4.60E-03 AP I L12786-01 7/3/2007 1-131 -1.20E-01 1.50E-01 6.50E-01 AP I L12786-01 7/3/2007 K-40 -4.30E-03 5.20E-03 2.90E-02 AP 1 L12786-01 7/3/2007 La-140 3.90E-02 2.80E-02 5.30E-02 AP 1 L12786-01 7/3/2007 Mn-54 1.20E-04 6.50E-04 2.70E-03 AP 1 L12786-01 7/3/2007 Nb-95 1.30E-03 2.50E-03 9.90E-03 AP 1 L12786-01 7/3/2007. Ru-103 -1.90E-03 1.90E-03 9.1OE-03 AP 1 L12786-01 7/3/2007 Ru-106 -5.30E-03 5.90E-03 2.70E-02 AP 1 L12786-01 7/3/2007 Sb-124 -6.10E-03 3.50E-03 2.20E-02 AP I L12786-01 7/3/2007 Sb-125 -4.OOE-04 1.70E-03 6.90E-03 AP 1 L12786-01 7/3/2007 Se-75 -2.10E-04 9.70E-04 3.90E-03 AP 1 L12786-01 7/3/2007 Zn-65 2.60E-03 1.90E-03 6.1OE-03 AP I L12786-01 7/3/2007 Zr-95 2.70E-03 1.90E-03 5.90E-03 AP 1 L12839-01 8/15/2007 GROSS BETA 2.38E-02 1.60E-03 3.20E-03

AP 1 L12898-01 8/29/2007 GROSS BETA 1.60E-02 1.50E-03 3.80E-03

AP 1 L12963-01 9/12/2007 GROSS BETA 1.88E-02 1.50E-03 3.60E-03

AP 1 L13018-01 9/26/2007 GROSS BETA 1.92E-02 1.50E-03 3.50E-03

AP 1 L13074-01 10/10/2007 GROSS BETA 2.56E-02 1.70E-03 3.60E-03

AP 1 L13137-01 9/26/2007 AcTh-228 9.OOE-04 1.60E-03 6.1OE-03 AP 1 L13137-01 9/26/2007 Ag-108m 0.OOE+00 2.90E-04 1.20E-03 AP 1 L13137-01 9/26/2007 Ag-ll0m -1.44E-03 5.90E-04 3.40E-03 AP 1 L13137-01 9/26/2007 Ba-140 0.OOE+00 0.OOE+00 2.OOE-02 AP 1 L13137-01 9/26/2007 Be-7 1.24E-01 1.70E-02 3.1OE-02 AP I L13137-01 9/26/2007 Ce-141 1.OOE-04 1.60E-03 6.1OE-03 AP 1 L13137-01 9/26/2007 Ce-144 -3.OOE-04 1.40E-03 5.80E-03 AP 1 L13137-01 9/26/2007 Co-57 1.40E-04 2.20E-04 7.80E-04 AP 1 L13137-01 9/26/2007 Co-58 -5.40E-04 6.60E-04 3.20E-03 AP 1 L13137-01 9/26/2007 Co-60 2.1OE-04 3.60E-04 1.50E-03 AP 1 L13137-01 9/26/2007 Cr-51 0.OOE+00 1.50E-02 5.70E-02 AP 1 L13137-01 9/26/2007 Cs-134 -1.60E-04 3.60E-04 1.70E-03 AP 1 L13137-01 9/26/2007 Cs-137 2.70E-04 2.50E-04 8.90E-04 AP 1 L13137-01 9/26/2007 Fe-59 -2.30E-03 2.50E-03 1.20E-02 AP 1 L13137-01 9/26/2007 1-131 0.OOE+00 3.70E-02 1.50E-01 AP 1 L13137-01 9/26/2007 K-40 5.50E-03 5.50E-03 2.OOE-02 AP 1 L13137-01 9/26/2007 La-140 0.OOE+00 0.OOE+00 2.OOE-02 AP 1 L13137-01 9/26/2007 Mn-54 -1.60E-04 4.20E-04 1.90E-03 AP 1 L13137-01 9/26/2007 Nb-95 -1.30E-03 1.40E-03 6.80E-03 AP 1 L13137-01 9/26/2007 Ru-103 -5.50E-04 9.60E-04 4.40E-03 AP I L13137-01 9/26/2007 Ru-106 -6.OOE-04 3.20E-03 1.40E-02 AP 1 L13137-01 9/26/2007 Sb-124 -2.40E-03 2.40E-03 1.30E-02 AP I L13137-01 9/26/2007 Sb-125 -7.90E-04 7.OOE-04 3.50E-03 AP I L13137-01 9/26/2007 Se-75 8.70E-04 7.10E-04 2.40E-03 AP 1 L13137-01 9/26/2007 Zn-65 7.OOE-04 1.10E-03 4.20E-03 AP 1 L13137-01 9/26/2007 Zr-95 -5.OOE-04 1.50E-03 6.40E-03 AP 1 L13156-01 10/24/2007 GROSS BETA 2.29E-02 1.60E-03 3.80E-03

AP 1 L13206-01 11/7/2007 GROSS BETA 1.55E-02 1.50E-03 3.70E-03

AP 1 L13273-01 11/20/2007 GROSS BETA 1.57E-02 1.60E-03 4.OOE-03

AP 1 L13330-01 12/5/2007 GROSS BETA 2.OOE-02 1.40E-03 3.OOE-03

AP 1 L13395-01 12/19/2007 GROSS BETA 2.63E-02 1.70E-03 3.60E-03

AP 1 L13510-01 1/2/2008 AcTh-228 -1.80E-03 . 2.20E-03 1.20E-02 AP 1 L13510-01 1/2/2008 Ag-108m 4.20E-04 6.60E-04 2.50E-03 AP I L13510-01 1/2/2008 Ag-110m 0.OOE+00 8.40E-04 4.40E-03 AP I L13510-01 1/2/2008 Ba-140 1.90E-02 3.20E-02 1.40E-01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-101-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program,- 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 1 L13510-01 1/2/2008 Be-7 6.90E-02 2.70E-02 7.70E-02 AP 1 L13510-01 1/2/2008 Ce-141 5.40E-03 4.1OE-03 1.40E-02 AP 1 L13510-01 1/2/2008 Ce-144 1.80E-03 4.50E-03 1.70E-02 AP I L13510-01 1/2/2008 Co-57 1.50E-04 4.50E-04 1.70E-03 AP I L13510-01 1/2/2008 Co-58 2.80E-03 1.40E-03 1.90E-03 AP 1 L13510-01 1/2/2008 Co-60 5.OOE-04 5.OOE-04 1.40E-03 AP 1 L13510-01 1/2/2008 Cr-51 -5.70E-02 3.OOE-02 1.50E-01 AP 1 L13510-01 1/2/2008 Cs-134 -3.00E-04 6.30E-04 3.40E-03 AP 1 L13510-01 1/2/2008 Cs-137 -5.OOE-05 4.90E-04 2.50E-03 AP 1 L13510-01 1/2/2008 Fe-59 -2.50E-03 2.50E-03 1.80E-02 AP 1 L13510-01 1/2/2008 1-131 0.OOE+00 8.40E-02 3.70E-01 AP 1 L13510-01 1/2/2008 K-40 3.90E-03 9.70E-03 4.20E-02 AP 1 L13510-01 1/2/2008 La-140 2.1OE-02 3.70E-02 1.60E-01 AP 1 L13510-01 1/2/2008 Mn-54 4.OOE-04 1.00E-03 4.20E-03 AP 1 L13510-01 1/2/2008 Nb-95 -3.50E-03 2.50E-03 1.50E-02 AP I L13510-01 1/2/2008 Ru-103 5.50E-03 2.20E-03 2.50E-03 AP I L13510-01 1/2/2008 Ru-106 -5.OOE-04 4.70E-03 2.40E-02 AP I L13510-01 1/2/2008 Sb-124 0.OOE+00 4.30E-03 2.20E-02 AP I L13510-01 1/2/2008 Sb-125 1.30E-03 1.30E-03 4.90E-03 AP 1 L13510-01 1/2/2008 Se-75 -3.OOE-04 1.20E-03 5.OOE-03 AP 1 L13510-01 1/2/2008 Zn-65 -3.10E-03 2.30E-03 1.30E-02 AP 1 L13510-01 1/2/2008 Zr-95 1.30E-03 1.30E-03 3.50E-03 AP 2 L11889-02 1/3/2007 GROSS BETA 1.08E-02 1.30E-03 3.30E-03

AP 2 L11936-02 1/17/2007 GROSS BETA 9.80E-03 1.40E-03 3.80E-03

AP 2 L11972-02 1/31/2007 GROSS BETA 2.36E-02 1.60E-03 3.50E-03

AP 2 L12030-02 2/13/2007 GROSSBETA 2.OOE-02 1.50E-03 3.40E-03

AP 2 L12084-02 2/28/2007 GROSS BETA 1.55E-02 1.50E-03 3.80E-03

AP 2 L12139-02 3/14/2007 GROSS BETA 1.44E-02 1.40E-03 3.40E-03

AP 2 L12207-02 3/28/2007 GROSS BETA 1,91E-02 1.60E-03 3.90E-03

AP 2 L12268-02 4/11/2007 GROSS BETA 8.90E-.03 1.40E-03 3.80E-03

AP. 2 L12315-02 3/28/2007 AcTh-228 -1.00E-04 1.50E-03 6.30E-03 AP 2 L12315-02 3/28/2007 Ag-108m 2.10E-04 3.20E-04 1.20E-03 AP 2 L12315-02 3/28/2007 Ag-lr0m 0.OOE+00 6.30E-04 2.60E-03 AP 2 L12315-02 3/28/2007 Ba-140 1.00E-02 1.50E-02 5.60E-02 AP 2 L12315-02 3/28/2007 Be-7 1.04E-01 1.50E-02 2.90E-02 AP 2 L12315-02 3/28/2007 Ce-141 -9.OOE-04 1.90E-03 7.1OE-03 AP 2 L12315-02 3/28/2007 Ce-144 1,20E-03 1.90E-03 6.90E-03 AP 2 L12315-02 3/28/2007 Co-57 -3.30E-04 2150E-04 1.00E-03 AP 2 L12315-02 3/28/2007 Co-58 8OOE-05 5.20E-04 2.20E-03 AP 2 L12315-02 3/28/2007 Co-60 3.OOE-04 4.40E-04 1.70E-03 AP 2 L12315-02 3/28/2007 Cr-51 0.OOE+00 1.50E-02 5.70E-02 AP 2 L12315-02 3/28/2007 Cs-134 2.OOE-04 3.80E-04 1.50E-03 AP 2 L12315-02 3/28/2007 Cs-137 -1.10E-04 4.1OE-04 1.70E-03 AP 2 L12315-02 3/28/2007 Fe-59 -8.OOE-04 1.70E-03 8.20E-03 AP 2 L12315-02 3/28/2007 1-131 -3.70E-02 3.70E-02 1.60E-01 AP 2 L12315-02 3/28/2007 K-40 -1.08E-02 5.10E-03 2.60E-02 AP 2 L12315-02 3/28/2007 La-140 1.20E-02 1.70E-02 6.40E-02 AP 2 L12315-02 3/28/2007 Mn-54 2,60E-04 3.70E-04 1.40E-03 AP 2 L12315-02 3/28/2007 Nb-95 -1.80E-03 1.60E-03 7.10E-03 AP 2 L12315-02 3/28/2007 Ru-103 -3.OOE-04 1.00E-03 4.20E-03 AP 2 L12315-02 3/28/2007 Ru-106 4,90E-03 4.80E-03 1.70E-02 AP 2 L12315-02 3/28/2007 Sb-124 -9.60E-04 9.60E-04 7.1OE-03 AP 2 L12315-02 3/28/2007 Sb-125 6.OOE-04 1.1OE-03 4.OOE-03 AP 2 L12315-02 3/28/2007 Se-75 4.30E-04 6.50E-04 2.30E-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-102-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 2 L12315-02 3/28/2007 Zn-65 -3.50E-04 3.50E-04 2.60E-03 AP 2 L12315-02 3/28/2007 Zr-95 -6.00E-04 1.10E-03 5.OOE-03 AP 2 L12336-02 4/25/2007 GROSS BETA 9.70E-03 1.30E-03 3.40E-03

AP 2 L12400-02 5/9/2007 GROSS BETA 8.30E-03 1.30E-03 3.50E-03

AP 2 L12461-02 5/23/2007 GROSS BETA 8.50E-03 1.30E-03 3.70E-03

AP 2 L12512-02 6/6/2007 GROSS BETA 2.1IE-02 1.50E-03 3.50E-03

AP 2 L12572-02 6/20/2007 GROSS BETA 1.34E-02 1.40E-03 3.60E-03

AP 2 L12645-02 7/3/2007 GROSS BETA 1.92E-02 1.60E-03 4.OOE-03

AP 2 L12700-02 7/18/2007 GROSS BETA 1.51E-02 1.30E-03 3.10E-03

AP 2 L12769-02 8/1/2007 GROSS BETA 1.32E-02 1.40E-03 3.30E-03

AP 2 L12786-02 7/3/2007 AcTh-228 -2.30E-04 2.50E-04 3.70E-03 AP 2 L12786-02 7/3/2007 Ag-108m -2.50E-04 3.90E-04 1.70E-03 AP 2 L12786-02 7/3/2007 Ag-110m 3.60E-04 3.60E-04 9.80E-04 AP 2 L12786-02 7/3/2007 Ba-140 1.70E-02 1.70E-02 4.50E-02 AP 2 L12786-02 7/3/2007 Be-7 1.13E-01 2.30E-02 4.50E-02 AP 2 L12786-02 7/3/2007 Ce-141 4.30E-03 3.40E-03 1.20E-02 AP 2 L12786-02 7/3/2007 Ce-144 5.OOE-03 2.70E-03 8.30E-03 AP 2 L12786-02 7/3/2007 Co-57 2.60E-04 3.1OE-04 1.1OE-03 AP 2 L12786-02 7/3/2007 Co-58 -3.40E-04 7.1OE-04 3.90E-03 AP 2 L12786-02 7/3/2007 Co-60 5.60E-04 6.20E-04 2.30E-03 AP 2 L12786-02 7/3/2007 Cr-51 -1.40E-02 1.70E-02 8.20E-02 AP 2 L12786-02 7/3/2007 Cs-134 -5.60E-04 5.70E-04 2.90E-03 AP 2 L12786-02 7/3/2007 Cs-137 6.OOE-05 6.1OE-04 2.50E-03 AP 2 L12786-02 7/3/2007 Fe-59 -4.90E-03 2.80E-03 1.80E-02 AP 2 L12786-02 7/3/2007 1-131 -3.20E-01 1.40E-01 6.90E-01 AP 2 L12786-02 7/3/2007 K-40 4.60E-03 7.1OE-03 2.80E-02 AP 2 L12786-02 7/3/2007 La-140 1.90E-02 1.90E-02 5.20E-02 AP 2 L12786-02 7/3/2007 Mn-54 9.OOE-05 5.50E-04 2.40E-03 AP 2 L12786-02 7/3/2007 Nb-95 2.OOE-04 1.80E-03 8.40E-03 AP 2 L12786-02 7/3/2007 Ru-103 6.OOE-04 1.1OE-03 4.60E-03 AP 2 L12786-02 7/3/2007 Ru-106 -7.60E-03 6.70E-03 3.OOE-02 AP 2 L12786-02 7/3/2007 Sb-124 3.90E-03 2.80E-03 5.30E-03 AP 2 L12786-02 7/3/2007 Sb-125 0.OOE+00 9.70E-04 4.30E-03 AP 2 L12786-02 7/3/2007 Se-75 -1.03E-03 7.40E-04 3.40E-03 AP 2 L12786-02 7/3/2007 Zn-65 1.27E-03 9.OOE-04 1.70E-03 AP 2 L12786-02 7/3/2007 Zr-95 3.40E-03 2.OOE-03 5.70E-03 AP 2 L12839-02 8/15/2007 GROSS BETA 2.23E-02 1.50E-03 3.10E-03

AP 2 L12898-02 8/29/2007 GROSS BETA 1.51E-02 1.50E-03 3.80E-03

AP 2 L12963-02 9/12/2007 GROSS BETA 1.90E-02 1.50E-03 3.60E-03 "

AP 2 L13018-02 9/26/2007 GROSS BETA 1.82E-02 1.50E-03 3.60E-03

AP 2 L13074-02 10/10/2007 GROSS BETA 2.38E-02 1.70E-03 3.60E-03

AP 2 L13137-02 9/26/2007 AcTh-228 -3.70E-03 2.OOE-03 1.1OE-02 AP 2 L13137-02 9/26/2007 Ag-108m -1.30E-04 2.20E-04 1.20E-03 AP 2 L13137-02 9/26/2007 Ag-il0m 2.OOE-04 1.20E-03 4.80E-03 AP 2 L13137-02 9/26/2007 Ba-140 1.50E-02 2.30E-02 9.50E-02 AP 2 L13137-02 9/26/2007 Be-7 1.43E-01 2.30E-02 3.40E-02 AP 2 L13137-02 9/26/2007 Ce-141 -1.70E-03 1.40E-03 6.30E-03 AP 2 L13137-02 9/26/2007 Ce-144 -1.30E-03 1.90E-03 7.90E-03 AP 2 L13137-02 9/26/2007 Co-57 3.70E-04 2.OOE-04 6.1OE-04 AP 2 L13137-02 9/26/2007 Co-58 -5.30E-04 5.30E-04 3.60E-03 AP 2 L13137-02 9/26/2007 Co-60 7.50E-04 5.30E-04 1.OOE-03 AP 2 L13137-02 9/26/2007 Cr-51 2.30E-02 1.60E-02 5.30E-02 AP 2 L13137-02 9/26/2007 Cs-134 1.80E-04 6.50E-04 2.70E-03 AP 2 L13137-02 9/26/2007 Cs-137 -6.30E-04 3.60E-04 2.30E-03 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-103-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 2 L13137-02 9/26/2007 Fe-59 3.20E-03 2.30E-03 4.40E-03 AP 2 L13137-02 9/26/2007 1-131 8.OOE-03 3.70E-02 1.60E-01 AP 2 L13137-02 9/26/2007 K-40 1.12E-02 7.50E-03 2.30E-02 AP 2 L13137-02 9/26/2007 La-140 1.50E-02 2.30E-02 9.50E-02 AP 2 L13137-02 9/26/2007 Mn-54 -3.60E-04 5.20E-04 2.70E-03 AP 2 L13137-02 9/26/2007 Nb-95 8.40E-04 8.40E-04 2.30E-03 AP 2 L13137-02 9/26/2007 Ru-103 -1.60E-03 1.40E-03 6.90E-03 AP 2 L13137-02 9/26/2007 Ru-106 2.OOE-03 3.40E-03 1.50E-02 AP 2 L13137-02 9/26/2007 Sb-124 4.40E-03 3.1OE-03 6.OOE-03 AP 2 L13137-02 9/26/2007 Sb-125 -6.OOE-05 5.90E-04 3.1OE-03 AP 2 L13137-02 9/26/2007 Se-75 -1.20E-04 6.20E-04 2.60E-03 AP 2 L13137-02 9/26/2007 Zn-65 -7.OOE-04 1.70E-03 8.OOE-03 AP 2 L13137-02 9/26/2007 Zr-95 -9.50E-04 9.50E-04 6.50E-03 AP 2 L13156-02 10/24/2007 GROSS BETA 2.22E-02 1.60E-03 3.80E-03

AP 2 L13206-02 11/7/2007 GROSS BETA 1.62E-02 1.50E-03 3.70E-03

AP 2 L13273-02 11/20/2007 GROSSBETA 1.78E-02 1.60E-03 4.OOE-03

AP 2 L13330-02 12/5/2007 GROSS BETA 1.87E-02 1.40E-03 3.OOE-03

AP 2 L13395-02 12/19/2007 GROSS BETA 2.88E-02 1.70E-03 3.70E-03

AP 2 L13510-02 1/2/2008 AcTh-228 4.60E-03 2.OOE-03 5.30E-03 AP 2 L13510-02 1/2/2008 Ag-108m 1.OOE-04 3.10E-04 1.30E-03 AP 2 L13510-02 1/2/2008 Ag-110m -1.20E-03 8.50E-04 4.20E-03 AP 2 L13510-02 1/2/2008 Ba-140 1.OOE-02 1.80E-02 7.60E-02 AP 2 L13510-02 1/2/2008 Be-7 8.40E-02 2.20E-02 5.80E-02 AP 2 L13510-02 1/2/2008 Ce-141 2.IOE-03 2.80E-03 9.90E-03 AP 2 L13510-02 1/2/2008 Ce-144 -1.40E-03 2.20E-03 9.OOE-03 AP 2 L13510-02 1/2/2008 Co-57 -6.OOE-05 2.70E-04 1.1OE-03 AP 2 L13510-02 1/2/2008 Co-58 -2.30E-04 7.50E-04 3.60E-03 AP 2 L13510-02 1/2/2008 Co-60 -6.30E-04 6.70E-04 3.30E-03 AP 2 L13510-02 1/2/2008 Cr-51 -2.OOE-02 2.10E-02 9.1OE-02 AP 2 L13510-02 1/2/2008 Cs-134 -1.35E-03 6.20E-04 3.20E-03 AP 2 L13510-02 1/2/2008 Cs-137 2.1OE-04 5.40E-04 2.1OE-03 AP 2 L13510-02 1/2/2008 Fe-59 -1.30E-03 2.20E-03 1.20E-02 AP 2 L13510-02 1/2/2008 1-131 1.03E-01 6.90E-02 2.20E-0 I AP 2 L13510-02 1/2/2008 K-40 -1.05E-02 5.80E-03 3.20E-02 AP 2 L13510-02 1/2/2008 La-140 1.20E-02 2.1OE-02 8.80E-02 AP 2 L13510-02 1/2/2008 Mn-54 4.OOE-04 4.90E-04 1.80E-03 AP 2 L13510-02 1/2/2008 Nb-95 -1.70E-03 1.80E-03 8.90E-03 AP 2 L13510-02 1/2/2008 Ru-103 5.OOE-04 1.60E-03 6.30E-03 AP 2 L13510-02 1/2/2008 Ru-106 5.OOE-04 4.90E-03 2.OOE-02 AP 2 L13510-02 1/2/2008 Sb-124 1.60E-03 1.60E-03 4.20E-03 AP 2 L13510-02 1/2/2008 Sb-125 -6.70E-04 9.50E-04 4.40E-03 AP 2 L13510-02 1/2/2008 Se-75 -1.01E-03 6.70E-04 3.1OE-03 AP 2 L13510-02 1/2/2008 Zn-65 -5.OOE-04 1.20E-03 5.70E-03 AP 2 L13510-02 1/2/2008 Zr-95 3.OOE-04 1.80E-03 7.40E-03 AP 3 Li 1889-03 1/3/2007 GROSS BETA 1.26E-02 1.30E-03 3.30E-03

AP 3 L11936-03 1/17/2007 GROSS BETA 1.29E-02 1.40E-03 3.70E-03

AP 3 L 11972-03 1/31/2007 GROSS BETA 2.32E-02 1.60E-03 3.70E-03

AP 3 L12030-03 2/13/2007 GROSS BETA 2.17E-02 1.60E-03 3.90E-03

AP 3 L12084-03 2/28/2007 GROSS BETA 1.72E-02 1.50E-03 3.60E-03

AP 3 L12139-03 3/14/2007 GROSS BETA 1.99E-02 1.50E-03 3.30E-03

AP 3 L12207-03 3/28/2007 GROSS BETA 1.91E-02 1.60E-03 3.80E-03

AP 3 L12268-03 4/11/2007 GROSS BETA 9.60E-03 1.30E-03 3.60E-03

AP 3 L12315-03 3/28/2007 AcTh-228 1.60E-03 1.40E-03 4.80E-03 AP 3 L12315-03 3/28/2007 Ag-108m 0.OOE+00 2.60E-04 1.1OE-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-104-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 3 L12315-03 3/28/2007 Ag-110m 2.OOE-04 7.1OE-04 2.80E-03 AP 3 L12315-03 3/28/2007 Ba-140 -5.20E-03 8.90E-03 4.80E-02 AP 3 L12315-03 3/28/2007 Be-7 1.14E-01 1.70E-02 .3.80E-02 AP 3 L12315-03 3/28/2007 Ce-141 1.00E-04 1.90E-03 6.90E-03 AP 3 L12315-03 3/28/2007 Ce-144 3.00E-04 1.80E-03 6.70E-03 AP 3 L12315-03 3/28/2007 Co-57 -5.60E-04 2.30E-04 9.90E-04 AP 3 L12315-03 3/28/2007 Co-58 -4.40E-04 7.40E-04 3.20E-03 AP 3 L12315-03 3/28/2007 Co-60 -6.OOE-05 4.40E-04 1.90E-03 AP 3 L12315-03 3/28/2007 Cr-51 -8.OOE-03 1.40E-02 5.60E-02 AP 3 L12315-03 3/28/2007 Cs-134 -2.OOE-04 3.OOE-04 1.50E-03 AP 3 L12315-03 3/28/2007 Cs-137 3.60E-04 3.90E-04 1.40E-03 AP 3 L12315-03 3/28/2007 Fe-59 -1.50E-03 2.40E-03 1.1OE-02 AP 3 L12315-03 3/28/2007 1-131 0.OOE+00 4.60E-02 1.80E-01 AP 3 L12315-03 3/28/2007 K-40 3.90E-03 6.OOE-03 2.20E-02 AP 3 L12315-03 3/28/2007 La-140 -6.OOE-03 I.OOE-02 5.50E-02 AP 3 L12315-03 3/28/2007 Mn-54 0.OOE+00 4.90E-04 2.OOE-03 AP 3 L12315-03 3/28/2007 Nb-95 1.90E-03 1.40E-03 4.90E-03 AP 3 L12315-03 3/28/2007 Ru-103 -2.51E-03 9.20E-04 4.90E-03 AP 3 L12315-03 3/28/2007 Ru-106 -2.50E-03 4.50E-03 1.90E-02 AP 3 L12315-03 3/28/2007 Sb-124 1.90E-03 1.30E-03 2.60E-03 AP 3 L12315-03 3/28/2007 Sb-125 I.1OE-03 1.00E-03 3.60E-03 AP 3 L12315-03 3/28/2007 Se-75 -7.50E-04 6.50E-04 2.60E-03 AP 3 L12315-03 3/28/2007 Zn-65 -2.40E-03 1.OE-03 5.70E-03 AP 3 L12315-03 3/28/2007 Zr-95 -1.70E-03 1.10E-03 5.60E-03 AP 3 L12336-03 4/25/2007 GROSS BETA 1.07E-02 1.40E-03 3.70E-03

AP 3 L12400-03 5/9/2007 GROSS BETA 9.OOE-03 1.30E-03 3.70E-03 AP 3 L12461-03 5/23/2007 GROSS BETA 8.OOE-03 1.30E-03 3.70E-03

AP 3 L12512-03 6/6/2007 GROSS BETA 2.14E-02 1.60E-03 3.70E-03

AP 3 L12572-03 6/20/2007 GROSS BETA 1.31E-02 1.40E-03 3.70E-03

AP 3 L12645-03 7/3/2007 GROSS BETA 1.42E-02 1.60E-03 4.1OE-03

AP 3 L12700-03 7/18/2007 GROSS BETA 1.49E-02 1.30E-03 3.20E-03

AP 3 L12769-03 8/1/2007 GROSS BETA 1.67E-02 1.50E-03 3.50E-03

AP 3 L12786-03 7/3/2007 AcTh-228 -1.00E-03 2.10E-03 9.50E-03 AP 3 L12786-03 7/3/2007 Ag-108m 2.50E-04 3.60E-04 1.40E-03 AP 3 L12786-03 7/3/2007 Ag-110m 0.OOE+00 7.40E-04 3.40E-03 AP 3 L12786-03 7/3/2007 Ba-140 0.OOE+00 0.OOE+00 4.60E-02 AP 3 L12786-03 7/3/2007 Be-7 1.33E-01 2.30E-02 3.1OE-02 AP 3 L12786-03 7/3/2007 Ce-141 -3.10E-03 3.20E-03 1.30E-02 AP 3 L12786-03 7/3/2007 Ce-144 -1.10E-03 2.50E-03 1.00E-02 AP 3 L12786-03 7/3/2007 Co-57 -6.OOE-05 2.30E-04 9.70E-04 AP 3 L12786-03 7/3/2007 Co-58 -6.OOE-04 1.20E-03 5.60E-03 AP 3 L12786-03 7/3/2007 Co-60 -4.OOE-05 4.60E-04 2.40E-03 AP 3 L12786-03 7/3/2007 Cr-51 0.OOE+00 2.60E-02 1.OOE-01 AP 3 L12786-03 7/3/2007 Cs-134 -3.90E-04 4.40E-04 2.40E-03 AP 3 L12786-03 7/3/2007 Cs-137 -3.OOE-05 3.OOE-04 1.50E-03 AP 3 L12786-03 7/3/2007 Fe-59 -3.40E-03 3.40E-03 1.80E-02 AP 3 L12786-03 7/3/2007 1-131 -8.OOE-02 1.40E-01 6.20E-01 AP 3 L12786-03 7/3/2007 K-40 5.OOE-03 8.30E-03 3.20E-02 AP 3 L12786-03 7/3/2007 La-140 0.OOE+00 0.OOE+00 5.30E-02 AP 3 L12786-03 7/3/2007 Mn-54 3.OOE-05 3.20E-04 1.70E-03 AP 3 L12786-03 7/3/2007 Nb-95 4.20E-03 3.OOE-03 9.90E-03 AP 3 L12786-03 7/3/2007 Ru-103 -1.30E-03 1.60E-03 7.70E-03 AP 3 L12786-03 7/3/2007 Ru-106 -9.OOE-04 5.OOE-03 2,20E-02 AP 3 L12786-03 7/3/2007 Sb-124 0.OOE+00 2.90E-03 1.50E-02 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-105-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 3 L12786-03 7/3/2007 Sb-125 2.OOE-03 1.20E-03 3.80E-03 AP 3 L12786-03 7/3/2007 Se-75 4.20E-04 8.90E-04 3.30E-03 AP 3 L12786-03 7/3/2007 Zn-65 6.OOE-04 1.40E-03 6.OOE-03 AP 3 L12786-03 7/3/2007 Zr-95 -5.00E-04 1.80E-03 8.50E-03 AP 3 L12839-03 8/15/2007 GROSS BETA 2.41E-02 1.60E-03 3.20E-03

AP 3 L12898-03 8/29/2007 GROSS BETA 1.63E-02 1.50E-03 3.90E-03

AP 3 L12963-03 9/12/2007 GROSS BETA 1.80E-02 1.50E-03 3.70E-03

AP 3 L13018-03 9/26/2007 GROSS BETA 1.76E-02 1.50E-03 3.50E-03

AP 3 L13074-03 10/10/2007 GROSS BETA 2.24E-02 1.70E-03 3.70E-03

AP 3 L13137-03 9/26/2007 AcTh-228 -1.33E-03 6.90E-04 6.20E-03 AP 3 L13137-03 9/26/2007 Ag-108m 0.OOE+00 2.20E-04 1.OOE-03 AP 3 L13137-03 9/26/2007 Ag-ll0m 4.OOE-05 4.70E-04 2.50E-03 AP 3 L13137-03 9/26/2007 Ba-140 -2.40E-02 2.40E-02 1.30E-01 AP 3 L13137-03 9/26/2007 Be-7 1.21E-01 1.90E-02 3.OOE-02 AP 3 L13137-03 9/26/2007 Ce-141 -1.00E-03 1.40E-03 5.90E-03 AP 3 L13137-03 9/26/2007 Ce-144 2.50E-03 1.50E-03 4.70E-03 AP 3 L13137-03 9/26/2007 Co-57 4.40E-04 1.90E-04 5.40E-04 AP 3 L13137-03 9/26/2007 Co-58 7.OOE-04 1.OOE-03 4.OOE-03 AP 3 L13137-03 9/26/2007 Co-60 6.20E-04 6.80E-04 2.60E-03 AP 3 L13137-03 9/26/2007 Cr-51 2.50E-02 1.60E-02 5.OOE-02 AP 3 L13137-03 9/26/2007 Cs-134 -3.10E-04 4.50E-04 2.40E-03 AP 3 L13137-03 9/26/2007 Cs-137 5.50E-04 3.20E-04 5.OOE-04 AP 3 L13137-03 9/26/2007 Fe-59 4.30E-03 2.50E-03 3.80E-03 AP 3 L13137-03 9/26/2007 1-131 -2.60E-02 4.20E-02 1.90E-01 AP 3 L13137-03 9/26/2007 K-40 8.70E-03 6.60E-03 2.20E-02 AP 3 L13137-03 9/26/2007 La-140 -2.40E-02 2.40E-02 1.30E-01 AP 3 L13137-03 9/26/2007 Mn-54 5.80E-04 7.40E-04 2.70E-03 AP 3 L13137-03 9/26/2007 Nb-95 0.OOE+00 0.OOE+00 2.OOE-03 AP 3 L13137-03 9/26/2007 Ru-103 -1.80E-03 1.30E-03 6.40E-03 AP 3 L13137-03 9/26/2007 Ru-106 -3.40E-03 3.40E-03 1.80E-02 AP 3 L13137-03 9/26/2007 Sb-124 0.OOE+00 0.OOE+00 5.20E-03 AP 3 L13137-03 9/26/2007 Sb-125 1.40E-03 1.1OE-03 3.80E-03 AP 3 L13137-03 9/26/2007 Se-75 -2.90E-04 4.70E-04 2.10E-03 AP 3 L13137-03 9/26/2007 Zn-65 -3.90E-03 1.60E-03 9.20E-03 AP 3 L13137-03 9/26/2007 Zr-95 -1.80E-03 1.60E-03 8.40E-03 AP 3 L13156-03 10/24/2007 GROSS BETA 2.18E-02 1.60E-03 3.80E-03

AP 3 L13206-03 11/7/2007 GROSSBETA 1.52E-02 1.50E-03 3.70E-03

AP 3 L13273-03 11/20/2007 GROSS BETA 1.72E-02 1.60E-03 4.OOE-03

AP 3 L13330-03 12/5/2007 GROSS BETA 1.93E-02 1.40E-03 3.OOE-03

AP 3 L13395-03 12/21/2007 GROSS BETA 2.56E-02 1.50E-03 3.20E-03

AP 3 L13510-03 1/2/2008 AcTh-228 -2.40E-03 1.40E-03 8.OOE-03 AP 3 L13510-03 1/2/2008 Ag-108m 2.1OE-04 3.30E-04 1.20E-03 AP 3 L13510-03 1/2/2008 Ag-110m -9.OOE-04 7.90E-04 3.90E-03 AP 3 L13510-03 1/2/2008 Ba-140 -2.10E-02 1.50E-02 9.60E-02 AP 3 L13510-03 1/2/2008 Be-7 7.60E-02 1.90E-02 4.70E-02 AP 3 L13510-03 1/2/2008 Ce-141 2.OOE-04 2.70E-03 1.00E-02 AP 3 L13510-03 1/2/2008 Ce-144 2.30E-03 2.40E-03 8.40E-03 AP 3 L13510-03 1/2/2008 Co-57 1.60E-04 2.80E-04 1.OOE-03 AP 3 L13510-03 1/2/2008 Co-58 -2.70E-04 5.70E-04 3.10E-03 AP 3 L13510-03 1/2/2008 Co-60 -3.50E-04 6.10E-04 2.90E-03 AP 3 L13510-03 1/2/2008 Cr-51 -1.00E-02 2.10E-02 8.70E-02 AP 3 L13510-03 1/2/2008 Cs-134 -3.OOE-04 4.50E-04 2.20E-03 AP 3 L13510-03 1/2/2008 Cs-137 -3.OOE-05 2.40E-04 1.30E-03 AP 3 L13510-03 1/2/2008 Fe-59 -1.30E-03 3.40E-03 1.50E-02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-106-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 3 L13510-03 1/2/2008 1-131 6.20E-02 6.20E-02 2.20E-01 AP 3 L13510-03 1/2/2008 K-40 1.40E-03 6.40E-03 2.70E-02 AP 3 L13510-03 1/2/2008 La-140 -2.40E-02 1.70E-02 1.10E-01 AP 3 L13510-03 1/2/2008 Mn-54 -3.90E-04 4.80E-04 2.40E-03 AP 3 L13510-03 1/2/2008 Nb-95 -8.00E-04 2.40E-03 1.00E-02 AP 3 L13510-03 1/2/2008 Ru-103 -1.43E-03 8.20E-04 5.1OE-03 AP 3 L13510-03 1/2/2008 Ru-106 -6.1OE-03 5.10E-03 2.40E-02 AP 3 L13510-03 1/2/2008 Sb-124 1.60E-03 1.60E-03 4.20E-03 AP 3 L13510-03 1/2/2008 Sb-125 7.OOE-04 1.1OE-03 4.OOE-03 AP 3 L13510-03 1/2/2008 Se-75 5.OOE-04 8.70E-04 3.20E-03 AP 3 L13510-03 1/2/2008 Zn-65 -5.20E-04 9.1OE-04 4.90E-03 AP 3 L13510-03 1/2/2008 Zr-95 -8.OOE-04 1.90E-03 8.60E-03 AP 4 Li 1889-04 1/3/2007 GROSS BETA 1.25E-02 1.40E-03 3.60E-03

AP 4 L11936-04 1/17/2007 GROSS BETA 1.48E-02 1.50E-03 3.90E-03

AP 4 L11972-04 1/31/2007 GROSS BETA 2.20E-02 1.60E-03 3.70E-03

AP 4 L12030-04 2/13/2007 GROSS BETA 2.OOE-02 1.60E-03 4.OOE-03

AP 4 L12084-04 2/28/2007 GROSS BETA 1.81E-02 1.50E-03 3.60E-03

AP 4 L12139-04 3/14/2007 GROSS BETA 1.62E-02 1.40E-03 3.30E-03

AP 4 L12207-04 3/28/2007 GROSS BETA 1.68E-02 1.50E-03 3.90E-03

AP 4 L12268-04 4/11/2007 GROSSBETA 1.11E-02 1.30E-03 3.60E-03

AP 4 L12315-04 3/28/2007 AcTh-228 -1.00E-04 1.40E-03 5.80E-03 AP 4 L12315-04 3/28/2007 Ag-108m 7.1OE-04 4.OOE-04 1.30E-03 AP 4 L12315-04 3/28/2007 Ag-ll0m -4.OOE-04 6.30E-04 2.80E-03 AP 4 L12315-04 3/28/2007 Ba-140 -1.OOE-02 1.OOE-02 5.60E-02 AP 4 L12315-04 3/28/2007 Be-7 1.33E-01 1.70E-02 3.30E-02

AP 4 L12315-04 3/28/2007 Ce-141 -2.50E-03 1.90E-03 7.40E-03 AP 4 L12315-04 3/28/2007 Ce-144 -6.OOE-04 1.90E-03 7.40E-03 AP 4 L12315-04 3/28/2007 Co-57 2.80E-04 2.30E-04 7.90E-04 AP 4 L12315-04 3/28/2007 Co-58 3.60E-04 7.OOE-04 2.70E-03 AP 4 L12315-04 3/28/2007 Co-60 1.30E-04 4.OOE-04 1.70E-03 AP 4 L12315-04 3/28/2007 Cr-51 8.OOE-03 1.70E-02 6.OOE-02 AP 4 L12315-04 3/28/2007 Cs-134 -1.70E-04 3.90E-04 1.70E-03 AP 4 L12315-04 3/28/2007 Cs-137 5.OOE-04 3.30E-04 1.1OE-03 AP 4 L12315-04 3/28/2007 Fe-59 8.OOE-04 2.30E-03 9.10E-03 AP 4 L12315-04 3/28/2007 1431 0.OOE+00 4.40E-02 1.70E-01 AP 4 L12315-04 3/28/2007 K-40 -1.09E-02 4.60E-03 2.50E-02 AP 4 L12315-04 3/28/2007 La-140 -1.20E-02 1.20E-02 6.40E-02 AP 4 L12315-04 3/28/2007 Mn-54 3.90E-04 4.40E-04 1.60E-03 AP 4 L12315-04 3/28/2007 Nb-95 -1.60E-03 1.20E-03 6.OOE-03 AP 4 L12315-04 3/28/2007 Ru-103 2.25E-03 9.70E-04 2.60E-03 AP 4 L12315-04 3/28/2007 Ru-106 -3.70E-03 4.70E-03 2.OOE-02 AP 4 L12315-04 3/28/2007 Sb-124 1.90E-03 1.40E-03 2.60E-03 AP 4 L12315-04 3/28/2007 Sb-125 4.OOE-04 1.1OE-03 4.20E-03 AP 4 L12315-04 3/28/2007 Se-75 4.30E-04 6.30E-04 2.20E-03 AP 4 L12315-04 3/28/2007 Zn-65 0.OOE+00 9.80E-04 4.20E-03 AP 4 L12315-04 3/28/2007 Zr-95 -1.00E-04 1.30E-03 5.30E-03 AP 4 L12336-04 4/25/2007 GROSS BETA 1.17E-02 1.30E-03 3.50E-03

AP 4 L12400-04 5/9/2007 GROSS BETA 7.50E-03 1.30E-03 3.60E-03

AP 4 L12461-04 5/23/2007 GROSS BETA 7.90E-03 1.30E-03 3.60E-03

AP 4 L12512-04 6/6/2007 GROSS BETA 1.82E-02 1.50E-03 3.60E-03

AP 4 L12572-04 6/20/2007 GROSS BETA 1.3 1E-02 1.40E-03 3.70E-03

AP 4 L12645-04 7/3/2007 GROSS BETA 1.47E-02 1.60E-03 4.20E-03

AP 4 L12700-04 7/18/2007 GROSS BETA 1.64E-02 1.40E-03 3.30E-03

AP 4 L12769-04 8/1/2007 GROSS BETA 1.41E-02 1.40E-03 3.50E-03 *

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-107-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC, STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 4 L12786-04 7/3/2007 AcTh-228 2.10E-03 1.40E-03 3.70E-03 AP 4 L12786-04 7/3/2007 Ag-108m -2.50E-04 3.50E-04 1.60E-03 AP 4 L12786-04 7/3/2007 Ag-110m -3.80E-04 6.60E-04 3.50E-03 AP 4 L12786-04 7/3/2007 Ba-140 3.20E-02 3.20E-02 8.80E-02 AP 4 L12786-04 7/3/2007 Be-7 1.34E-01 2.60E-02 4.90E-02 AP 4 L12786-04 7/3/2007 Ce-141 -7.10E-03 4.50E-03 1.90E-02 AP 4 L12786-04 7/3/2007 Ce-144 -6.OOE-04 3.20E-03 1.20E-02 AP 4 L12786-04 7/3/2007 Co-57 -4.40E-04 3.40E-04 1.50E-03 AP 4 L12786-04 7/3/2007 Co-58 -7.OOE-04 1.30E-03 6.20E-03 AP 4 L12786-04 7/3/2007 Co-60 3.OOE-04 3.OOE-04 8.20E-04 AP 4 L12786-04 7/3/2007 Cr-51 0.OOE+00 4.OOE-02 1.60E-01 AP 4 L12786-04 7/3/2007 Cs-134 -2.1OE-04 2.1OE-04 1.70E-03 AP 4 L12786-04 7/3/2007 Cs-137 -1.00E-04 5.1OE-04 2.20E-03 AP 4 L12786-04 7/3/2007 Fe-59 2.OOE-03 3.50E-03 1.50E-02 AP 4 L12786-04 7/3/2007 1-131 3.40E-01 3.80E-01 1.40E+00 AP 4 L12786-04 7/3/2007 K-40 7.60E-03 7.80E-03 2.80E-02 AP 4 L12786-04 7/3/2007 La-140 3.70E-02 3.70E-02 i.00E-0I AP 4 L12786-04 7/3/2007 Mn-54 -1.90E-04 3.90E-04 2.10E-03 AP 4 L12786-04 7/3/2007 Nb-95 -1.90E-03 2.80E-03 1.40E-02 AP 4 L12786-04 7/3/2007 Ru-103 3.10E-03 3.1OE-03 1.1OE-02 AP 4 L12786-04 7/3/2007 Ru-106 1.30E-03 4.50E-03 1.90E-02 AP 4 L12786-04 7/3/2007 Sb-124 4.60E-03 3.20E-03 6.20E-03 AP 4 L12786-04 7/3/2007 Sb-125 1.20E-03 1.30E-03 4.90E-03 AP 4 L12786-04 7/3/2007 Se-75 8.90E-04 8.40E-04 2.90E-03 AP 4 L12786-04 7/3/2007 Zn-65 6.60E-04 6.60E-04 1.80E-03 AP 4 L12786-04 7/3/2007 Zr-95 2.OOE-04 1.80E-03 8.30E-03 AP 4 L12839-04 8/15/2007 GROSS BETA 2.34E-02 1.60E-03 3.30E-03

AP 4 L12898-04 8/29/2007 GROSS BETA 1.83E-02 1.60E-03 4.OOE-03

AP 4 L12963-04 9/12/2007 GROSS BETA 2.07E-02 1.60E-03 3.80E-03

AP 4 L13018-04 9/26/2007 GROSS BETA 1.94E-02 1.60E-03 3.70E-03

AP 4 L13074-04 10/10/2007 GROSS BETA 2.49E-02 1.70E-03 3.80E-03

AP 4 L13137-04 9/26/2007 AcTh-228 -2.OOE-05 8.30E-04 5.OOE-03 AP 4 L13137-04 9/26/2007 Ag-108m -2.40E-04 3.80E-04 1.70E-03 AP 4 L13137-04 9/26/2007 Ag-ll0m -3.70E-04 6.50E-04 3.50E-03 AP 4 L13137-04 9/26/2007 Ba-140 -1.20E-02 1.20E-02 9.OOE-02 AP 4 L13137-04 9/26/2007 Be-7 1.27E-01 2.1OE-02 3.70E-02 AP 4 L13137-04 9/26/2007 Ce-141 3.OOE-03 1.60E-03 4.80E-03 AP 4 L13137-04 9/26/2007 Ce-144 -2.1OE-03 1.50E-03 7.OOE-03 AP 4 L13137-04 9/26/2007 Co-57 -3.60E-04 2.30E-04 i.OOE-03 AP 4 L13137-04 9/26/2007 Co-58 4.70E-04 6.90E-04 2.90E-03 AP 4 L13137-04 9/26/2007 Co-60 3.OOE-04 6.20E-04 2.70E-03 AP 4 L13137-04 9/26/2007 Cr-51 1.40E-02 1.60E-02 5.90E-02 AP 4 L13137-04 9/26/2007 Cs-134 -1.70E-04 4.OOE-04 2.10E-03 AP 4 L13137-04 9/26/2007 Cs-137 -1.00E-04 5.1OE-04 2.30E-03 AP 4 L13137-04 9/26/2007 Fe-59 1.50E-03 2.60E-03 1.1OE-02 AP 4 L13137-04 9/26/2007 1-131 -6.OOE-02 4.80E-02 2.30E-01 AP 4 L13137-04 9/26/2007 K-40 9.10E-03 6.90E-03 2.20E-02 AP 4 L13137-04 9/26/2007 La-140 -1.20E-02 1.20E-02 *9.OOE-02 AP 4 L13137-04 9/26/2007 Mn-54 -4.OOE-04 4.40E-04 2.40E-03 AP 4 L13137-04 9/26/2007 Nb-95 -4.OOE-04 1.90E-03 8.50E-03 AP 4 L13137-04 9/26/2007 Ru-103 1.40E-03 1.1OE-03 3.50E-03 AP 4 L13137-04 9/26/2007 Ru-106 -3.30E-03 5.90E-03 2.60E-02 AP 4 L13137-04 9/26/2007 Sb-124 -2.OOE-03 2.OOE-03 1.50E-02 AP 4 L13137-04 9/26/2007 Sb-125 -1.90E-03 1.30E-03 6.OOE-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-108-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 4 L13137-04 9/26/2007 Se-75 3.OOE-05 5.50E-04 2.30E-03 AP 4 L13137-04 9/26/2007 Zn-65 -7.OOE-04 1.20E-03 6.30E-03 AP 4 L13137-04 9/26/2007 Zr-95 6.OOE-04 1.40E-03 5.90E-03 AP 4 L13156-04 10/24/2007 GROSS BETA 2.45E-02 1.70E-03 4.00E-03

AP 4 L13206-04 11/7/2007 GROSS BETA 2.03E-02 1.70E-03 3.90E-03

AP 4 L13273-04 11/20/2007 GROSS BETA 1.95E-02 1.70E-03 4.30E-03

AP 4 L13330-04 12/5/2007 GROSS BETA 1.84E-02 1.50E-03 3.20E-03

AP 4 L13395-04 12/19/2007 GROSS BETA 2.80E-02 1.80E-03 3.80E-03 AP 4 L13510-04 1/2/2008 AcTh-228 -5.OOE-04 1.90E-03 1.1OE-02 AP 4 L13510-04 1/2/2008 Ag-108m 4.40E-04 3.10E-04 6.OOE-04 AP 4 L13510-04 1/2/2008 Ag-ll0m -3.20E-03 1.40E-03 8.30E-03 AP 4 L13510-04 1/2/2008 Ba-140 2.OOE-02 2.OOE-02 5.40E-02 AP 4 L13510-04 1/2/2008 Be-7 1.44E-01 3.30E-02 6.80E-02 AP 4 L13510-04 1/2/2008 Ce-141 2.10E-03 3.70E-03 1.40E-02 AP 4 L13510-04 1/2/2008 Ce-144 0.OOE+00 3.70E-03 1.50E-02 AP 4 L13510-04 1/2/2008 Co-57 3.70E-04 4.60E-04 1.70E-03 AP 4 L13510-04 1/2/2008 Co-58 1.00E-04 1.OOE-03 5.20E-03 AP 4 L13510-04 1/2/2008 Co-60 1.07E-03 7.60E-04 1.40E-03 AP 4 L13510-04 1/2/2008 Cr-51 1.OOE-02 3.40E-02 1.30E-01 AP 4 L13510-04 1/2/2008 Cs-134 -2.60E-04 8.80E-04 4.20E-03 AP 4 L13510-04 1/2/2008 Cs-137 -6.OOE-05 5.20E-04 2.70E-03 AP 4 L13510-04 1/2/2008 Fe-59 -2.60E-03 2.60E-03 1.90E-02 AP 4 L13510-04 1/2/2008 1-131 -7.40E-02 9.10E-02 4.40E-01 AP 4 L13510-04 1/2/2008 K-40 -1.12E-02 8.60E-03 5.20E-02 AP 4 L13510-04 1/2/2008 La-140 2.30E-02 2.30E-02 6.20E-02 AP 4 L13510-04 1/2/2008 Mn-54 0.OOE+00 1.OOE-03 4.50E-03 AP 4 L13510-04 1/2/2008 Nb-95 -2.50E-03 2.40E-03 1.40E-02 AP 4 L13510-04 1/2/2008 Ru-103 2.90E-03 1.70E-03 2.60E-03 AP 4 L13510-04 1/2/2008 Ru-106 9.20E-03 7.50E-03 2.60E-02 AP 4 L13510-04 1/2/2008 Sb-124 0.OOE+00 0.OOE+00 8.80E-03 AP 4 L13510-04 1/2/2008 Sb-125 7.OOE-04 1.20E-03 5.20E-03 AP 4 L13510-04 1/2/2008 Se-75 -7.OOE-04 1.20E-03 5.30E-03 AP 4 L13510-04 1/2/2008 Zn-65 -1.10E-03 1.90E-03 1.OOE-02 AP 4 L13510-04 1/2/2008 Zr-95 -9.OOE-04 2.80E-03 1.40E-02 AP 5 Ll1889-05 1/3/2007 GROSS BETA 1.27E-02 1.30E-03 3.10E-03 AP 5 L11936-05 1/17/2007 GROSS BETA 1.30E-02 1.40E-03 3.60E-03 "

AP 5 L11972-05 1/31/2007 GROSS BETA 2.17E-02 1.50E-03 3.50E-03

AP 5 L12030-05 2/13/2007 GROSS BETA 1.63E-02 1.50E-03 3.70E-03

AP 5 L12084-05 2/28/2007 GROSS BETA 1.73E-02 1.40E-03 3.30E-03 AP 5 L12139-05 3/14/2007 GROSS BETA 1.62E-02 1.40E-03 3.1OE-03

AP 5 L12207-05 3/28/2007 GROSS BETA 1.61E-02 1.40E-03 3.60E-03

AP 5 L12268-05 4/11/2007 GROSS BETA 9.40E-03 1.30E-03 3.40E-03

AP 5 L12315-05 3/28/2007 AcTh-228 -5.OOE-04 1.50E-03 6.20E-03 AP 5 L12315-05 3/28/2007 Ag-108m 1.30E-04 3.1OE-04 1.20E-03 AP 5 L12315-05 3/28/2007 Ag-110m 0.OOE+00 6.40E-04 2.60E-03 AP 5 L12315-05 3/28/2007 Ba-140 0.OOE+00 0.OOE+00 1.30E-02 AP 5 L12315-05 3/28/2007 Be-7 1.23E-01 1.70E-02 3.60E-02 AP 5 L12315-05 3/28/2007 Ce-141 -4.OOE-04 1.80E-03 6.70E-03 AP 5 L12315-05 3/28/2007 Ce-144 3.OOE-04 2100E-03 7.20E-03 AP 5 L12315-05 3/28/2007 Co-57 3.OOE-04 2.30E-04 7.60E-04 AP 5 L12315-05 3/28/2007 Co-58 2.90E-04 5.30E-04 2.10E-03 AP 5 L12315-05 3/28/2007 Co-60 -6.20E-04 5.70E-04 2.60E-03 AP 5 L12315-05 3/28/2007 Cr-51 2.1OE-02 1.50E-02 5.OOE-02 AP 5 L12315-05 3/28/2007 Cs-134 5.20E-04 3.OOE-04 8.70E-04 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-109-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 5 L12315-05 3/28/2007 Cs-137 2.20E-04 3.90E-04 1.40E-03 AP 5 L12315-05 3/28/2007 Fe-59 2.90E-03 1.40E-03 1.90E-03 AP 5 L12315-05 3/28/2007 1-131 2.70E-02 4.70E-02 1.70E-01 AP 5 L12315-05 3/28/2007 K-40 5.10E-03 5.50E-03 2.00E-02 AP 5 L12315-05 3/28/2007 La-140 0.00E+00 0.OOE+00 1.50E-02 AP 5 L12315-05 3/28/2007 Mn-54 1.20E-04 4.40E-04 1.70E-03 AP 5 L12315-05 3/28/2007 Nb-95 -1.40E-03 1.50E-03 6.50E-03 AP 5 L12315-05 3/28/2007 Ru-103 2.38E-03 9.50E-04 2.50E-03 AP 5 L12315-05 3/28/2007 Ru-106 -4.80E-03 3.OOE-03 1.50E-02 AP 5 L12315-05 3/28/2007 Sb-124 -1.80E-03 1.30E-03 8.40E-03 AP 5 L12315-05 3/28/2007 Sb-125 3.80E-04 9.20E-04 3.40E-03 AP 5 L12315-05 3/28/2007 Se-75 0.OOE+00 6.30E-04 2.30E-03 AP 5 L12315-05 3/28/2007 Zn-65 -3.30E-04 5.60E-04 3.OOE-03 AP 5 L12315-05 3/28/2007 Zr-95 8.OOE-04 1.50E-03 5.60E-03 AP 5 L12336-05 4/25/2007 GROSS BETA 1.22E-02 1.30E-03 3.50E-03

AP 5 L12400-05 5/9/2007 GROSS BETA 1.09E-02 1.40E-03 3.80E-03

AP 5 L12461-05 5/23/2007 GROSS BETA 8.60E-03 1.40E-03 3.80E-03

AP 5 L12512-05 6/6/2007 GROSS BETA 2.OOE-02 1.60E-03 3.70E-03

AP 5 L12572-05 6/20/2007 GROSS BETA 1.39E-02 1.50E-03 3.80E-03

AP 5 L12645-05 7/3/2007 GROSS BETA 1.75E-02 1.70E-03 4.20E-03

AP 5 L12700-05 7/18/2007 GROSS BETA 1.62E-02 1.40E-03 3.30E-03

AP 5 L12769-05 8/1/2007 GROSS BETA 1.43E-02 1.40E-03 3.50E-03

AP 5 L12786-05 7/3/2007 AcTh-228 -2.OOE-04 1.60E-03 7.50E-03 AP 5 L12786-05 7/3/2007 Ag-108m -1.30E-04 4.20E-04 1.80E-03 AP 5 L12786-05 7/3/2007 Ag-110m 0.OOE+00 7.40E-04 3.40E-03 AP 5 L12786-05 7/3/2007 Ba-140 0.OOE+00 3.40E-02 1.60E-01 AP 5 L12786-05 7/3/2007 Be-7 1.44E-01 2.60E-02 5.OOE-02 AP 5 L12786-05 7/3/2007 Ce-141 -1.20E-03 3.80E-03 1.50E-02 AP 5 L12786-05 7/3/2007 Ce-144 6.90E-03 3.1OE-03 9.50E-03 AP 5 L12786-05 7/3/2007 Co-57 -3.30E-04 3.1OE-04 1.30E-03 AP 5 L12786-05 7/3/2007 Co-58 -7.50E-04 8.40E-04 4.60E-03 AP 5 L12786-05. 7/3/2007 Co-60 6.20E-04 4.40E-04 8.30E-04 AP 5 L12786-05 7/3/2007 Cr-51 0.OOE+00 2.80E-02 1.1OE-01 AP 5 L12786-05 7/3/2007 Cs-134 1.04E-03 6.70E-04 2.10E-03 AP 5 L12786-05 7/3/2007 Cs-137 1.90E-04 1.90E-04 5.20E-04 AP 5 L12786-05 7/3/2007 Fe-59 -1.70E-03 4.50E-03 2.OOE-02 AP 5 L12786-05 7/3/2007 1-131 1.60E-01 1.60E-01 5.80E-01 AP 5 L12786-05 7/3/2007 K-40 1.40E-03 5.30E-03 2.40E-02 AP 5 L12786-05 7/3/2007 La-140 0.OOE+00 3.90E-02 1.80E-01 AP 5 L12786-05 7/3/2007 Mn-54 -1.50E-04 5.10E-04 2.40E-03 AP 5 L12786-05 7/3/2007 Nb-95 9.OOE-04 1.00E 4.OOE-03 AP 5 L12786-05 7/3/2007 Ru-103 -1.30E-03 1.60E-03 7.70E-03 AP 5 L12786-05 7/3/2007 Ru-106 -9.10E-03 5.20E-03 2.70E-02 AP 5 L12786-05 7/3/2007 Sb-124 6.10E-03 4.50E-03 1.50E-02 AP 5 L12786-05 7/3/2007 Sb-125 -1.20E-03 1.IOE-03 5.40E-03 AP 5 L12786-05 7/3/2007 Se-75 4.20E-04 9.OOE-04 3.40E-03 AP 5 L12786-05 7/3/2007 Zn-65 2.OOE-03 1.70E-03 6.OOE-03 AP 5 L12786-05 7/3/2007 Zr-95 -3.60E-03 2.OOE-03 1.1OE-02 AP 5 L12839-05 8/15/2007 GROSS BETA 2.25E-02 1.60E-03 3.30E-03

AP 5 L12898-05 8/29/2007 GROSS BETA 1.88E-02 1.60E-03 4.OOE-03

AP 5 L12963-05 9/12/2007 GROSS BETA 1.84E-02 1.60E-03 3.80E-03

AP 5 L13018-05 9/26/2007 GROSS BETA 1.88E-02 1.60E-03 3.70E-03

AP 5 L13074-05 10/10/2007 GROSS BETA 2.42E-02 1.70E-03 3.80E-03

AP 5 L13137-05 9/26/2007 AcTh-228 -2.OOE-04 1.70E-03 7.1OE-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-110-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 7 L12786-06 7/3/2007 Cr-51 2.80E-02 2.40E-02 8.30E-02 AP 7 L12786-06 7/3/2007 Cs-134 2.70E-04 4.OOE-04 1.70E-03 AP 7 L12786-06 7/3/2007 Cs-137 -1.14E-03 5.80E-04 3.OOE-03 AP 7 L12786-06 7/3/2007 Fe-59 3.30E-03 3.30E-03 1.20E-02 AP 7 L12786-06 7/3/2007 1-131 -4.90E-01 1.70E-01 8.40E-01 AP 7 L12786-06 7/3/2007 K-40 1.33E-02 7.90E-03 2.40E-02 AP 7 L12786-06 7/3/2007 La-140 1.90E-02 3.40E-02 1.40E-01 AP 7 L12786-06 7/3/2007 Mn-54 2.70E-04 4.OOE-04 1.70E-03 AP 7 L12786-06 7/3/2007 Nb-95 4.10E-03 3.OOE-03 9.80E-03 AP 7 L12786-06 7/3/2007 Ru-103 -1.90E-03 1.70E-03 8.30E-03 AP 7 L12786-06 7/3/2007 Ru-106 -7.10E-03 5.50E-03 2.70E-02 AP 7 L12786-06 7/3/2007 Sb-124 0.OOE+00 0.OOE+00 5.40E-03 AP 7 L12786-06 7/3/2007 Sb-125 1.20E-03 1.10E-03 3.80E-03 AP 7 L12786-06 7/3/2007 Se-75 4.20E-04 9.30E-04 3.50E-03 AP 7 L12786-06 7/3/2007 Zn-65 6.OOE-04 1.40E-03 6.OOE-03 AP 7 L12786-06 7/3/2007 Zr-95 2.50E-03 1.50E-03 2.30E-03 AP 7 L12839-06 8/15/2007 GROSS BETA 2.12E-02 1.50E-03 3.OOE-03

AP 7 L12898-06 8/29/2007 GROSS BETA 1.87E-02 1.50E-03 3.60E-03

AP 7 L12963-06 9/12/2007 GROSS BETA 1.85E-02 1.50E-03 3.50E-03

AP 7 L13018-06 9/26/2007 GROSS BETA 1.92E-02 1.50E-03 3.40E-03

AP 7 L13074-06 10/10/2007 GROSS BETA 2.75E-02 1.70E-03 3.50E-03

AP 7 L13137-06 9/26/2007 AcTh-228 2.90E-03 2.1OE-03 6.70E-03 AP 7 L13137-06 9/26/2007 Ag-108m 0.OOE+00 2.50E-04 1.20E-03 AP 7 L13137-06 9/26/2007 Ag-lr0m 7.90E-04 5.60E-04 1.1OE-03 AP 7 L13137-06 9/26/2007 Ba-140 -2.40E-02 1.70E-02 1.20E-01 AP 7 L13137-06 9/26/2007 Be-7 9.70E-02 1.70E-02 8.20E-03 AP 7 L13137-06 9/26/2007 Ce-141 0.OOE+00 1.20E-03 5.OOE-03 AP 7 L13137-06 9/26/2007 Ce-144 -2.OOE-04 1.60E-03 6.50E-03 AP 7 L13137-06 9/26/2007 Co-57 -1.90E-04 2.40E-04 1.OOE-03 AP 7 L13137-06 9/26/2007 Co-58 3.70E-04 8.1OE-04 3.50E-03 AP 7 L13137-06 9/26/2007 Co-60 -5.OOE-05 5.50E-04 2.80E-03 AP 7 L13137-06 9/26/2007 Cr-51 0.00E400 1.40E-02 6.OOE-02 AP 7 L13137-06 9/26/2007 Cs-134 -3.50E-04 5.1OE-04 2.70E-03 AP 7 L13137-06 9/26/2007 Cs-137 0.OOE+00 5.OOE-04 2.20E-03 AP 7 L13137-06 9/26/2007 Fe-59 -1.60E-03 2.70E-03 1.50E-02 AP 7 L13137-06 9/26/2007 1-131 1.90E-02 2.60E-02 1.IOE-01 AP 7 L13137-06 9/26/2007 K-40 3.10E-03 7.50E-03 3.20E-02 AP 7 L13137-06 9/26/2007 La-140 -2.40E-02 1.70E-02 1.20E-01 AP 7 L13137-06 9/26/2007 Mn-54 -3.OOE-04 3.OOE-04 2.10E-03 AP 7 L13137-06 9/26/2007 Nb-95 5.OOE-04 1.90E-03 8.20E-03 AP 7 L13137-06 9/26/2007 Ru-103 -5.OOE-04 1.1OE-03 5.50E-03 AP 7 L13137-06 9/26/2007 Ru-106 1.90E-03 3.30E-03 1.40E-02 AP 7 L13137-06 9/26/2007 Sb-124 2.10E-03 2.1OE-03 5.80E-03 AP 7 L13137-06 9/26/2007 Sb-125 3.OOE-04 1.1OE-03 4.30E-03 AP 7 L13137-06 9/26/2007 Se-75 1.03E-03 6.50E-04 2.10E-03 AP 7 L13137-06 9/26/2007 Zn-65 -7.20E-04 7.20E-04 5.30E-03 AP 7 L13137-06 9/26/2007 Zr-95 -9.20E-04 9.20E-04 6.30E-03 AP 7 L13156-06 10/24/2007 GROSS BETA 2.54E-02 1.70E-03 3.60E-03

AP 7 L13206-06 11/7/2007 GROSS BETA 1.66E-02 1.50E-03 3.50E-03

AP 7 L13273-06 11/20/2007 GROSS BETA 1.73E-02 1.60E-03 3.90E-03

AP 7 L13330-06 12/5/2007 GROSS BETA 1.97E-02 1.40E-03 2.90E-03 AP 7 L13395-06 12/21/2007 GROSS BETA 2.69E-02 1.50E-03 3.10E-03

AP 7 L13510-06 1/3/2008 AcTh-228 -1.70E-03 1.20E-03 9.50E-03 AP 7 L13510-06 1/3/2008 Ag-108m 9.90E-04 4.40E-04 5.30E-04

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-113-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 7 L13510-06 1/3/2008 Ag-110m 1.10E-03 1.1OE-03 4.20E-03 AP 7 L13510-06 1/3/2008 Ba-140 1.70E-02 1.70E-02 4.50E-02 AP 7 L13510-06 1/3/2008 Be-7 9.40E-02 2.80E-02 7.OOE-02 AP 7 L13510-06 1/3/2008 Ce-141 2.60E-03 3.90E-03 1.40E-02 AP 7 L13510-06 1/3/2008 Ce-144 0.00E+00 2.80E-03 1.10E-02 AP 7 L13510-06 1/3/2008 Co-57 5.60E-04 4.60E-04 1.60E-03 AP 7 L13510-06 1/3/2008 Co-58 7.00E-04 1.10E-03 4.60E-03 AP 7 L13510-06 1/3/2008 Co-60 4.80E-04 4.80E-04 1.30E-03 AP 7 L13510-06 1/3/2008 Cr-51 1.80E-02 2.20E-02 8.20E-02 AP 7 L13510-06 1/3/2008 Cs-134 -5.60E-04 8.50E-04 4.20E-03 AP 7 L13510-06 1/3/2008 Cs-137 2.50E-04 5.50E-04 2.40E-03 AP 7 L13510-06 1/3/2008 Fe-59 0.OOE+00 4.60E-03 2.IOE-02 AP 7 L13510-06 1/3/2008 1-131 0.OOE+00 8.60E-02 3.60E-01 AP 7 L13510-06 1/3/2008 K-40 3.20E-03 6.70E-03 3.1OE-02 AP 7 L13510-06 1/3/2008 La-140 1.90E-02 1.90E-02 5.20E-02 AP 7 L13510-06 1/3/2008 Mn-54 -3.70E-04 6.50E-04 3.50E-03 AP 7 L13510-06 1/3/2008 Nb-95 1.70E-03 3.OOE-03 1.20E-02 AP 7 L13510-06 1/3/2008 Ru-103 0.OOE+00 2.40E-03 1.OOE-02 AP 7 L13510-06 1/3/2008 Ru-106 8.1OE-03 6.70E-03 2.30E-02 AP 7 L13510-06 1/3/2008 Sb-124 2.90E-03 2.90E-03 7.80E-03 AP 7 L13510-06 1/3/2008 Sb-125 2.50E-03 1.80E-03 5.90E-03 AP 7 L13510-06 1/3/2008 Se-75 0.OOE+00 7.70E-04 3.40E-03 AP 7 L13510-06 1/3/2008 Zn-65 1.00E-03 1.70E-03 7.30E-03 AP 7 L13510-06 1/3/2008 Zr-95 -9.OOE-04 1.90E-03 1.1OE-02 AP 8 Ll 1889-07 1/3/2007 GROSS BETA 1.19E-02 1.30E-03 3.20E-03

AP 8 L11936-07 1/17/2007 GROSS BETA 1.52E-02 1.40E-03 3.70E-03

AP 8 L11972-07 1/31/2007 GROSSBETA 2.16E-02 1.50E-03 3.60E-03

AP 8 L12030-07 2/13/2007 GROSS BETA 1.84E-02 1.50E-03 3.70E-03

AP 8 L12084-07 2/28/2007 GROSS BETA 1.75E-02 1.40E-03 3.40E-03

AP 8 L12139-07 3/14/2007 GROSS BETA 1.76E-02 1.40E-03 3.20E-03

AP 8 L12207-07 3/28/2007 GROSS BETA 1.47E-02 1.50E-03 3.70E-03 AP 8 L12268-07 4/11/2007 GROSS BETA 8.10E-03 1.20E-03 3.50E-03

AP 8 L12315-07 3/28/2007 AcTh-228 1.20E-03 1.50E-03 5.60E-03 AP 8 L12315-07 3/28/2007 Ag-108m 3.40E-04 3.OOE-04 1.OOE-03 AP 8 L12315-07 3/28/2007 Ag-lr0m 5.70E-04. 6.30E-04 2.30E-03 AP 8 L12315-07 3/28/2007 Ba-140 1.50E-02 1.1OE-02 3.70E-02 AP 8 L12315-07 3/28/2007 Be-7 1.32E-01 1.60E-02 2.50E-02 AP 8 L12315-07 3/28/2007 Ce-141 -3.70E-03 1.70E-03 7.OOE-03 AP 8 L12315-07 3/28/2007 Ce-144 -1.20E-03 2.20E-03 8.40E-03 AP 8 L12315-07 3/28/2007 Co-57 -1.20E-04 2.30E-04 9.OOE-04 AP 8 L12315-07 3/28/2007 Co-58 1.1OE-04 5.70E-04 2.40E-03 AP 8 L12315-07 3/28/2007 Co-60 -2.20E-04 3.90E-04 1.90E-03 AP 8 L12315-07 3/28/2007 Cr-51 1.40E-02 1.60E-02 5.50E-02 AP 8 L12315-07 3/28/2007 Cs-134 -2.70E-04 3.90E-04 1.80E-03 AP 8 L12315-07 3/28/2007 Cs-137 -9.OOE-05 3.50E-04 1.50E-03 AP 8 L12315-07 3/28/2007 Fe-59 7.OOE-04 1.60E-03 6.80E-03 AP 8 L12315-07 3/28/2007 1-131 -4.60E-02 5.30E-02 2.10E-01 AP 8 L12315-07 3/28/2007 K-40 -1.06E-02 3.80E-03 2.30E-02 AP 8 L12315-07 3/28/2007 La-140 1.80E-02 1.30E-02 4.30E-02 AP 8 L12315-07 3/28/2007 Mn-54 2.50E-04 4.OOE-04 1.50E-03 AP 8 L12315-07 3/28/2007 Nb-95 -1.90E-03 1.20E-03 6.1OE-03 AP 8 L12315-07 3/28/2007 Ru-103 -5.OOE-04 1.1OE-03 4.50E-03 AP 8 L12315-07 3/28/2007 Ru-106 5.50E-03 3.20E-03 9.80E-03 AP 8 L12315-07 3/28/2007 Sb-124 9.20E-04 9.20E-04 2.50E-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-114-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 8 L12315-07 3/28/2007 Sb-125 6.10E-04 8.OOE-04 2.90E-03 AP 8 L12315-07 3/28/2007 Se-75 -8.30E-04 5.70E-04 2.40E-03 AP 8 L12315-07 3/28/2007 Zn-65 -1.30E-03 1.1OE-03 5.OOE-03 AP 8 L12315-07 3/28/2007 Zr-95 1.40E-03 1.20E-03 4.40E-03 AP 8 L12336-07 4/25/2007 GROSS BETA 9.60E-03 1.30E-03 3.50E-03

AP 8 L12400-07 5/9/2007 GROSS BETA 9.00E-03 1.30E-03 3.60E-03

AP 8 L12461-07 5/23/2007 GROSS BETA 9.OOE-03 1.30E-03 3.70E-03

AP 8 L12512-07 6/6/2007 GROSS BETA 2.03E-02 1.50E-03 3.50E-03

AP 8 L12572-07 6/20/2007 GROSS BETA 1.43E-02 1.40E-03 3.60E-03

AP 8 L12645-07 7/3/2007 GROSS BETA 1.47E-02 1.50E-03 3.90E-03

AP 8 L12700-07 7/18/2007 GROSS BETA 1.44E-02 1.30E-03 3.10E-03

AP 8 L12769-07 8/1/2007 GROSS BETA 1.52E-02 1.40E-03 3.30E-03

AP 8 L12786-07 7/3/2007 AcTh-228 5.OOE-04 1.30E-03 5.90E-03 AP 8 L12786-07 7/3/2007 Ag-108m 1.20E-04 3.20E-04 1.30E-03 AP 8 L12786-07 7/3/2007 Ag-110m -1.43E-03 8.80E-04 4.70E-03 AP 8 L12786-07 7/3/2007 Ba-140 0.OOE+00 2.30E-02 1.20E-01 AP 8 L12786-07 7/3/2007 Be-7 1.22E-01 2.40E-02 5.OOE-02 AP 8 L12786-07 7/3/2007 Ce-141 -5.30E-03 3.30E-03 1.40E-02 AP 8 L12786-07 7/3/2007 Ce-144 1.70E-03 2.60E-03 9.60E-03 AP 8 L12786-07 7/3/2007 Co-57 1.20E-04 2.90E-04 1.1OE-03 AP 8 L12786-07 7/3/2007 Co-58 -3.30E-04 7.1OE-04 3.90E-03 AP 8 L12786-07 7/3/2007 Co-60 -3.30E-04 3.30E-04 2.30E-03 AP 8 L12786-07 7/3/2007 Cr-51 7.OOE-03 2.40E-02 9.50E-02 AP 8 L12786-07 7/3/2007 Cs-134 -2.10E-04 2.1OE-04 1.60E-03 AP 8 L12786-07 7/3/2007 Cs-137 7.50E-04 3,70E-04 5.OOE-04 AP 8 L12786-07 7/3/2007 Fe-59 -6.50E-03 4,60E-03 2.30E-02 AP 8 L12786-07 7/3/2007 1-131 -8.OOE-02 1.30E-01 5.60E-01 AP 8 L12786-07 7/3/2007 K-40 4.30E-03 5.90E-03 2.30E-02 AP 8 L12786-07 7/3/2007 La-140 0.OOE+00 2.70E-02 1.40E-01 AP 8 L12786-07 7/3/2007 Mn-54 5.30E-04 5.50E-04 2.OOE-03 AP 8 L12786-07 7/3/2007 Nb-95 -8.OOE-04 1.50E-03 8.30E-03 AP 8 L12786-07 7/3/2007 Ru-103 3.10E-03 1.60E-03 .4.50E-03 AP 8 L12786-07 7/3/2007 Ru-106 3.OOE-03 4.70E-03 1.80E-02 AP 8 L12786-07 7/3/2007 Sb-124 0.OOE+00 0.OOE+00 5.30E-03 AP 8 L12786-07 7/3/2007 Sb-125 0.OOE+00 1.20E-03 5.20E-03 AP 8 L12786-07 7/3/2007 Se-75 1.43E-03 8.90E-04 2.90E-03 AP 8 L12786-07 7/3/2007 Zn-65 -6.OOE-04 2.1OE-03 8.90E-03 AP 8 L12786-07 7/3/2007 Zr-95 1.OOE-03 1.80E-03 7.1OE-03 AP 8 L12839-07 8/15/2007 GROSS BETA 2.08E-02 1.50E-03 3.10E-03

AP 8 L12898-07 8/29/2007 GROSS BETA 1.55E-02 1.50E-03 3.80E-03

AP 8 L12963-07 9/12/2007 GROSS BETA 1.88E-02 1.50E-03 3.60E-03

AP 8 L13018-07 9/26/2007 GROSS BETA 1.74E-02 1.50E-03 3.50E-03

AP 8 L13074-07 10/10/2007 GROSS BETA 2.37E-02 1.60E-03 3.50E-03

AP 8 L13137-07 9/26/2007 AcTh-228 -1.96E-03 9.50E-04 7.1OE-03 AP 8 L13137-07 9/26/2007 Ag-108m 4.40E-04 3.80E-04 1.30E-03 AP 8 L13137-07 9/26/2007 Ag-lr0m 3.90E-04 5.80E-04 2.40E-03 AP 8 L13137-07 9/26/2007 Ba-140 1.20E-02 2.OOE-02 8.50E-02 AP 8 L13137-07 9/26/2007 Be-7 1.1OE-01 1.90E-02 3.1OE-02 AP 8 L13137-07 9/26/2007 Ce-141 1.20E-03 1.40E-03 5.10E-03 AP 8 L13137-07 9/26/2007 Ce-144 -5:OOE-04 1.30E-03 5.50E-03 AP 8 L13137-07 9/26/2007 Co-57 2.OOE-05 1.60E-04 6.40E-04 AP 8 L13137-07 9/26/2007 Co-58 -6.OOE-05 5.90E-04 3.1OE-03 AP 8 L13137-07 9/26/2007 Co-60 0.OOE+00 0.OOE+00 8.70E-04 AP 8 L13137-07 9/26/2007 Cr-51 8.OOE-03 1.40E-02 5.30E-02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-115-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 8 L13137-07 9/26/2007 Cs-134 1.90E-04 4.20E-04 1.80E-03 AP 8 L13137-07 9/26/2007 Cs-137 0.OOE+00 0.OOE+00 4.80E-04 AP 8 L13137-07 9/26/2007 Fe-59 -2.80E-03 3.40E-03 1.70E-02 AP 8 L13137-07 9/26/2007 1-131 -9.00E-03 4.70E-02 2.00E-01 AP 8 L13137-07 9/26/2007 K-40 2.10E-03 4.60E-03 2.10E-02 AP 8 L13137-07 9/26/2007 La-140 1.20E-02 2.00E-02 8.50E-02 AP 8 L13137-07 9/26/2007 Mn-54 1.33E-03 6.60E-04 1.80E-03 AP 8 L13137-07 9/26/2007 Nb-95 -1.90E-03 1.90E-03 9.40E-03 AP 8 L13137-07 9/26/2007 Ru-103 -9.OOE-04 1.1OE-03 5.30E-03 AP 8 L13137-07 9/26/2007 Ru-106 3.30E-03 3.30E-03 1.20E-02 AP 8 L13137-07 9/26/2007 Sb-124 1.90E-03 1.90E-03 5.1OE-03 AP 8 L13137-07 9/26/2007 Sb-125 -6.90E-04 6.90E-04 3.70E-03 AP 8 L13137-07 9/26/2007 Se-75 -2.60E-04 5.OOE-04 2.20E-03 AP 8 L13137-07 9/26/2007 Zn-65 1.30E-03 1.30E-03 4.70E-03 AP 8 L13137-07 9/26/2007 Zr-95 6.OOE-04 1.30E-03 5.50E-03 AP 8 L13156-07 10/24/2007 GROSS BETA 2.05E-02 1.60E-03 3.70E-03

AP 8 L13206-07 11/7/2007 GROSS BETA 1.47E-02 1.40E-03 3.60E-03

AP 8 L13273-07 11/20/2007 GROSS BETA 1.73E-02 1.60E-03 3.80E-03

AP 8 L13330-07 12/5/2007 GROSS BETA 1.88E-02 1.40E-03 2.90E-03

AP 8 L13395-07 12/19/2007 GROSS BETA 2.50E-02 1.60E-03 3.50E-03

AP 8 L13510-07 1/2/2008 AcTh-228 -3.50E-03 1.40E-03 8.30E-03 AP 8 L13510-07 1/2/2008 Ag-108m -3.OOE-04 3.30E-04 1.50E-03 AP 8 L13510-07 1/2/2008 Ag-l0m .2.90E-04 6.50E-04 2.70E-03 AP 8 L13510-07 1/2/2008 Ba-140 -1.00E-02 1.70E-02 9.30E-02 AP 8 L13510-07 1/2/2008 Be-7 1.25E-01 2.20E-02 4.50E-02 AP 8 L13510-07 1/2/2008 Ce-141 -2.80E-03 2.10E-03 9.OOE-03 AP 8 L13510-07 1/2/2008 Ce-144 4.OOE-04 2.60E-03 9.80E-03 AP 8 L13510-07 1/2/2008 Co-57 -4.30E-04 3.OOE-04 1.30E-03 AP 8 L13510-07 1/2/2008 Co-58 -5.60E-04 6.30E-04 3.50E-03 AP 8 L13510-07 1/2/2008 Co-60 -3.OOE-05 3.70E-04 1.90E-03 AP 8 L13510-07 1/2/2008 Cr-51 1.OOE-02 2.30E-02 8.40E-02 AP 8 L13510-07 1/2/2008 Cs-134 6.OOE-04 4.20E-04 1.30E-03 AP 8 L13510-07 1/2/2008 Cs-137 4.60E-04 2.60E-04 4.10E-04 AP 8 L13510-07 1/2/2008 Fe-59 -1.20E-03 3.20E-03 1.50E-02 AP 8 L13510-07 1/2/2008 1-131 -2.OOE-02 8.20E-02 3.30E-01 AP 8 L13510-07 1/2/2008 K-40 1.60E-03 7.OOE-03 2.80E-02 AP 8 L13510-07 1/2/2008 La-140 -1.10E-02 2.OOE-02 1.1OE-01 AP 8 L13510-07 1/2/2008 Mn-54 -7.60E-04 5.40E-04 2.70E-03 AP 8 L13510-07 1/2/2008 Nb-95 -1.80E-03 2.80E-03 1.20E-02 AP 8 L13510-07 1/2/2008 Ru-103 -1.80E-03 1.30E-03 6.50E-03 AP 8 L13510-07 1/2/2008 Ru-106 1.27E-02 5.40E-03 1.50E-02 AP 8 L13510-07 1/2/2008 Sb-124 3.OOE-03 2.10E-03 4.1OE-03 AP 8 L13510-07 1/2/2008 Sb-125 -1.00E-03 1.40E-03 5.80E-03 AP 8 L13510-07 1/2/2008 Se-75 -3.20E-04 6.50E-04 2.70E-03 AP 8 L13510-07 1/2/2008 Zn-65 -2.50E-03 1.30E-03 7.IOE-03 AP 8 L13510-07 1/2/2008 Zr-95 1.60E-03 1.90E-03 7.10E-03 AP 9 Ll1889-08 1/3/2007 GROSS BETA 1.38E-02 1.30E-03 3.20E-03

AP 9 Ll1936-08 1/17/2007 GROSSBETA 1.30E-02 1.40E-03 3.70E-03

AP 9 L11972-08 1/31/2007 GROSS BETA 2.26E-02 1.60E-03 3.60E-03

AP 9 L12030-08 2/13/2007 GROSS BETA 2.03E-02 1.60E-03 3.80E-03

AP 9 L12084-08 2/28/2007 GROSS BETA 1.93E-02 1.40E-03 3.40E-03

AP 9 L12139-08 3/14/2007 GROSS BETA 1.72E-02 1.40E-03 3.20E-03

AP 9 L12207-08 3/28/2007 GROSS BETA 1.73E-02 1.50E-03 3.70E-03

AP 9 L12268-08 4/11/2007 GROSS BETA 8.40E-03 1.20E-03 3.50E-03 *

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-116-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 9 L12315-08 3/28/2007 AcTh-228 2.40E-03 1.50E-03 4.70E-03 AP 9 L12315-08 3/28/2007 Ag-108m 7.OOE-05 2.80E-04 1.LOE-03 AP 9 L12315-08 3/28/2007 Ag-lr0m 1.14E-03 8.50E-04 2.90E-03 AP 9 L12315-08 3/28/2007 Ba-140 3.1OE-02 1.30E-02 1.40E-02 AP 9 L12315-08 3/28/2007 Be-7 1.16E-01 1.80E-02 4.50E-02 AP 9 L12315-08 3/28/2007 Ce-141 1.90E-03 2.1OE-03 7.00E-03 AP 9 L12315-08 3/28/2007 Ce-144 -1.80E-03 2.40E-03 9.10E-03 AP 9 L12315-08 3/28/2007 Co-57 6.OOE-05 2.50E-04 9.OOE-04 AP 9 L12315-08 3/28/2007 Co-58 -1.24E-03 7.OOE-04 3.50E-03 AP 9 L12315-08 3/28/2007 Co-60 -8.OOE-05 4.90E-04 2.1OE-03 AP 9 L12315-08 3/28/2007 Cr-51 0.OOE+00 1.60E-02 6.OOE-02 AP 9 L12315-08 3/28/2007 Cs-134 2.20E-04 4.40E-04 1.70E-03 AP 9 L12315-08 3/28/2007 Cs-137 -9.OOE-05 5.30E-04 2.1OE-03 AP 9 L12315-08 3/28/2007 Fe-59 7.OOE-04 2.20E-03 8.80E-03 AP 9 L12315-08 3/28/2007 1-131 -6.70E-02 5.OOE-02 2.10E-01 AP 9 L12315-08 3/28/2007 K-40 -5.60E-03 5.20E-03 2.40E-02 AP 9 L12315-08 3/28/2007 La-140 3.60E-02 1.50E-02 1.60E-02 AP 9 L12315-08 3/28/2007 Mn-54 -1.60E-04 3.70E-04 1.60E-03 AP 9 L12315-08 3/28/2007 Nb-95 -2.50E-03 1.60E-03 7.40E-03 AP 9 L12315-08 3/28/2007 Ru-103 -1.60E-03 1.1OE-03 4.90E-03 AP 9 L12315-08 3/28/2007 Ru-106 6.OOE-03 4.20E-03 1.40E-02 AP 9 L12315-08 3/28/2007 Sb-124 -9.OOE-04 1.60E-03 8.60E-03 AP 9 L12315-08 3/28/2007 Sb-125 -3.OOE-04 1.1OE-03 4.40E-03 AP 9 L12315-08 3/28/2007 Se-75 -8.30E-04 7.1OE-04 2.80E-03 AP 9 L12315-08 3/28/2007 Zn-65 0.OOE+00 8.20E-04 3.60E-03 AP 9 L12315-08 3/28/2007 Zr-95 2.OOE-04 1.OOE-03 4.40E-03 AP 9 L12336-08 4/25/2007 GROSS BETA 1.05E-02 1.20E-03 3.30E-03

AP 9 L12400-08 5/9/2007 GROSS BETA 8.30E-03 1.LOE-03 3.1OE-03

AP 9 L12461-08 5/23/2007 GROSS BETA 6.70E-03 1.1OE-03 3.30E-03

AP 9 L12512-08 6/6/2007 GROSS BETA 2.01E-02 1.40E-03 ,3.30E-03

AP 9 L12572-08 6/20/2007 GROSS BETA 1.09E-02 1.30E-03 3.50E-03

AP 9 L12645-08 7/3/2007 GROSS BETA 1.47E-02 1.50E-03 3.90E-03

AP 9 L12700-08 7/18/2007 GROSS BETA 1.49E-02 1.30E-03 3.10E-03

AP 9 L12769-08 8/1/2007 GROSS BETA 1.32E-02 1.30E-03 3.30E-03

AP 9 L12786-08 7/3/2007 AcTh-228 2.60E-03 1.70E-03 5.50E-03 AP 9 L12786-08 7/3/2007 Ag-108m -2.30E-04 3.60E-04 1.60E-03 AP 9 L12786-08 7/3/2007 Ag-110m -1.34E-03 6.70E-04 4.OOE-03 AP 9 L12786-08 7/3/2007 Ba-140 1.60E-02 1.60E-02 4.20E-02 AP 9 L12786-08 7/3/2007 Be-7 7.20E-02 2.40E-02 7.OOE-02 AP 9 L12786-08 7/3/2007 Ce-141 -3.30E-03 2.80E-03 1.20E-02 AP 9 L12786-08 7/3/2007 Ce-144 1.00E-03 2.90E-03 1.1OE-02 AP 9 L12786-08 7/3/2007 Co-57 -4.70E-04 2.80E-04 1.30E-03 AP 9 L12786-08 7/3/2007 Co-58 -3.10E-04 6.70E-04 3.60E-03 AP 9 L12786-08 7/3/2007 Co-60 0.OOE+00 0.OOE+00 7.50E-04 AP 9 L12786-08 7/3/2007 Cr-51 -3.20E-02 2.60E-02 1.20E-01 AP 9 L12786-08 7/3/2007 Cs-134 5.OOE-04 5.20E-04 1.90E-03 AP 9 L12786-08 7/3/2007 Cs-137 1.50E-04 3.20E-04 1.40E-03 AP 9 L12786-08 7/3/2007 Fe-59 -3.1OE-03 3.10E-03 1.60E-02 AP 9 L12786-08 7/3/2007 1-131 -4.OOE-02 1.50E-01 6.OOE-01 AP 9 L12786-08 7/3/2007 K-40 4.80E-03 8.40E-03 3.20E-02 AP 9 L12786-08 7/3/2007 La-140 1.80E-02 1.80E-02 4.90E&02 AP 9 L12786-08 7/3/2007 Mn-54 -3.30E-04 5.OOE-04 2.50E-03 AP 9 L12786-08 7/3/2007 Nb-95 2.70E-03 1.90E-03 6.30E-03 AP 9 L12786-08 7/3/2007 Ru-103 -1.20E-03 1.80E-03 8.20E-03 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-117-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

AP 9 L12786-08 7/3/2007 Ru-106 1.40E-03 3.1OE-03 1.30E-02 AP 9 L12786-08 7/3/2007 Sb-124 0.OOE+00 2.60E-03 1.40E-02 AP 9 L12786-08 7/3/2007 Sb-125 -7.40E-04 9.1OE-04 4.40E-03 AP 9 L12786-08 7/3/2007 Se-75 -1.90E-04 8.30E-04 3.30E-03 AP 9 L12786-08 7/3/2007 Zn-65 5.90E-04 5.90E-04 1.60E-03 AP 9 L12786-08 7/3/2007 Zr-95 -3.40E-03 1.50E-03 9.40E-03 AP 9 L12839-08 8/15/2007 GROSS BETA 2.56E-02 1.60E-03 3.10E-03

AP 9 L12898-08 8/29/2007 GROSS BETA 1.51E-02 1.50E-03 3.70E-03

AP 9 L12963-08 9/12/2007 GROSS BETA 1.84E-02 1.50E-03 3.60E-03

AP 9 L13018-08 9/26/2007 GROSS BETA 1.95E-02 1.50E-03 3.50E-03

AP 9 L13074-08 10/10/2007 GROSS BETA 2.28E-02 1.60E-03 3.50E-03

AP 9 L13137-08 9/26/2007 AcTh-228 -1.60E-03 1.30E-03 7.70E-03 AP 9 L13137-08 9/26/2007 Ag-108m 3.30E-04 2.90E-04 1.OOE-03 AP 9 L13137-08 9/26/2007 Ag-ll0m -3.50E-04 6.1OE-04 3.30E-03 AP 9 L13137-08 9/26/2007 Ba-140 0.OOE+00 1.60E-02 8.60E-02 AP 9 L13137-08 9/26/2007 Be-7 1.63E-01 2.30E-02 3.50E-02 AP 9 L13137-08 9/26/2007 Ce-141 1.30E-03 1.50E-03 5.20E-03 AP 9 L13137-08 9/26/2007 Ce-144 -4.OOE-04 1.60E-03 6.60E-03 AP 9 L13137-08 9/26/2007 Co-57 4.OOE-05 2.OOE-04 7.80E-04 AP 9 L13137-08 9/26/2007 Co-58 -1.37E-03 6.80E-04 4.30E-03 AP 9 L13137-08 9/26/2007 Co-60 -7.20E-04 5.1OE-04 3.20E-03 AP 9 L13137-08 9/26/2007 Cr-51 1.70E-02 1.80E-02 6.40E-02 AP 9 L13137-08 9/26/2007 Cs-134 -6.OOE-04 3.50E-04 2.30E-03 AP 9 L13137-08 9/26/2007 Cs-137 -6.OOE-05 3.90E-04 1.80E-03 AP 9 L13137-08 9/26/2007 Fe-59 1.40E-03 1.40E-03 3.80E-03 AP 9 L13137-08 9/26/2007 1-131 0.OOE+00 2.90E-02 1.30E-01 AP 9 L13137-08 9/26/2007 K-40 -9.80E-03 6.OOE-03 3.60E-02 AP 9 L13137-08 9/26/2007 La-140 0.OOE+00 1.60E-02 8.60E-02 AP 9 L13137-08 9/26/2007 Mn-54 6.OOE-05 4.30E-04 2.OOE-03 AP 9 L13137-08 9/26/2007 Nb-95 1.60E-03 1.70E-03 6.30E-03 AP 9 L13137-08 9/26/2007 Ru-103 -9.10E-04 9.1OE-04 4.90E-03 AP 9 L13137-08 9/26/2007 Ru-106 4.80E-03 3.90E-03 1.30E-02 AP 9 L13137-08 9/26/2007 Sb-124 3.80E-03 2.70E-03 5.10E-03 AP 9 L13137-08 9/26/2007 Sb-125 1.06E-03 9.40E-04 3.30E-03 AP 9 L13137-08 9/26/2007 Se-75 0.OOE+00 4.80E-04 2.OOE-03 AP 9 L13137-08 9/26/2007 Zn-65 0.OOE+00 9.OOE-04 4.70E-03 AP 9 L13137-08 9/26/2007 Zr-95 -8.20E-04 8.20E-04 5.60E-03 AP 9 L13156-08 10/24/2007 GROSS BETA 2.20E-02 1.70E-03 3.80E-03

AP 9 L13206-08 11/7/2007 GROSS BETA 1.47E-02 1.50E-03 3.60E-03

AP 9 L13273-08 11/20/2007 GROSS BETA 1.79E-02 1.60E-03 3.90E-03

AP 9 L13330-08 12/5/2007 GROSS BETA 1.58E-02 1.30E-03 3.OOE-03

AP 9 L13395-08 12/19/2007 GROSS BETA 2.46E-02 1.60E-03 3.60E-03

AP 9 L13510-08 1/2/2008 AcTh-228 -5.OOE-04 1.80E-03 9.90E-03 AP 9 L13510-08 1/2/2008 Ag-108m -2.10E-04 4.60E-04 2.20E-03 AP 9 L13510-08 1/2/2008 Ag-110m 1.18E-03 8.30E-04 1.60E-03 AP 9 L13510-08 1/2/2008 Ba-140 -1.80E-02 1.80E-02 1.40E-01 AP 9 L13510-08 1/2/2008 Be-7 1.07E-01 2.90E-02 6.90E-02 AP 9 L13510-08 1/2/2008 Ce-141 1.90E-03 3.60E-03 1.40E-02 AP 9 L13510-08 1/2/2008 Ce-144 -3.60E-03 3.90E-03 1.70E-02 AP 9 L13510-08 1/2/2008 Co-57 2.60E-04 3.10E-04 1.10E-03 AP 9 L13510-08 1/2/2008 Co-58 -1.00E-03 1.60E-03 7.80E-03 AP 9 L13510-08 1/2/2008 Co-60 1.OOE-03 7.OOE-04 1.30E-03 AP 9 L13510-08 1/2/2008 Cr-51 -2.80E-02 2.80E-02 1.30E-01 AP 9 L13510-08 1/2/2008 Cs-134 1.62E-03 9.40E-04 2.70E-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-118-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi'm3) (pCi/m3)

AP 9 L13510-08 1/2/2008 Cs-137 1.20E-03 7.90E-04 2.50E-03 AP 9 L13510-08 1/2/2008 Fe-59 -2.40E-03 6.40E-03 2.90E-02 AP 9 L13510-08 1/2/2008 1-131 3.40E-02 9.OOE-02 3.70E-01 AP 9 L13510-08 1/2/2008 K-40 9.OOE-03 1.10E-02 4.10E-02 AP 9 L13510-08 1/2/2008 La- 140 -2.1 OE-02 2.10E-02 1.60E-01 AP 9 L13510-08 1/2/2008 Mn-54 3.90E-04 8.70E-04 3.60E-03 AP 9 L13510-08 1/2/2008 Nb-95 -3.70E-03 1.70E-03 1.30E-02 AP 9 L13510-08 1/2/2008 Ru-103 1.80E-03 1.30E-03 2.50E-03 AP 9 L13510-08 1/2/2008 Ru-106 1.50E-03 8.50E-03 3.50E-02 AP 9 L13510-08 1/2/2008 Sb-124 0.OOE+00 0.OOE+00 8.20E-03 AP 9 L13510-08 1/2/2008 Sb-125 7.OOE-04 2.OOE-03 7.90E-03 AP 9 L13510-08 1/2/2008 Se-75 9.90E-04 7.30E-04 2.40E-03 AP 9 L13510-08 1/2/2008 Zn-65 2.10E-03 1.50E-03 2.80E-03 AP 9 L13510-08 1/2/2008 Zr-95 -1.1OE-03 1.1OE-03 8.80E-03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-119-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF Li1889-01 1/3/2007 1-131 6.60E-03 4.10E-03 1.30E-02 CF Li 1936-01 1/17/2007 1-131 1.00E-02 6.OOE-03 1.90E-02 CF Li 1972-01 1/31/2007 1-131 1.30E-03 3.10E-03 1.20E-02 CF L12030-01 2/13/2007 1-131 1.00E-03 4.90E-03 1.90E-02 CF L12084-01 2/28/2007 1-131 0.OOE+00 4.90E-03 1.90E-02 CF L12139-01 3/14/2007 1-131 -7.OOE-04 3.OOE-03 1.20E-02 CF L12207-01 3/28/2007 1-131 -3.80E-03 3.50E-03 1.50E-02 CF L12268-01 4/11/2007 1-131 3.40E-03 5.20E-03 1.90E-02 CF L12336-01 4/25/2007 1-131 1.20E-03 4.50E-03 1.70E-02 CF L12400-01 5/9/2007 1-131 4.90E-03 4.70E-03 1.60E-02 CF L12461-01 5/23/2007 1-131 7.20E-03 5.1OE-03 1.70E-02 CF L12512-01 6/6/2007 1-131 -2.80E-03 6.60E-03 2.70E-02 CF L12572-01 6/20/2007 1-131 -4.10E-03 3.40E-03 1.50E-02 CF L12645-01 7/3/2007 1-131 1.32E-02 7.20E-03 2.30E-02 CF L12700-01 7/18/2007 1-131 3.30E-03 5.20E-03 1.90E-02 CF L12769-01 8/1/2007 1-131 -8.50E-03 6.OOE-03 2.70E-02 CF L12839-01 8/15/2007 1-131 3.60E-03 6.80E-03 2.60E-02 CF L12898-01 8/29/2007 1-131 -3.20E-03 5.40E-03 2.20E-02 CF L12963-01 9/12/2007 1-131 2.70E-03 5.60E-03 2.10E-02 CF L13018-01 9/26/2007 1-131 4.30E-03 4.70E-03 1.70E-02 CF L13074-01 10/10/2007 1-131 7.OOE-04 3.10E-03 1.20E-02 CF L13156-01 10/24/2007 1-131 -5.80E-03 4.70E-03 2.OOE-02 CF L13206-01 11/7/2007 1-131 0.OOE+00 4.90E-03 1.90E-02 CF L13273-01 11/20/2007 1-131 2.90E-03 6.40E-03 2.40E-02 CF L13330-01 12/5/2007 1-131 -9.40E-03 8.20E-03 3.50E-02 CF L13395-01 12/19/2007 1-131 1.55E-02 9.60E-03 3.10E-02 CF Li1889-02 1/3/2007 1-131 -4.90E-03 4.90E-03 2.OOE-02 CF Ll 1936-02 1/17/2007 1-131 2.OOE-03 4.50E-03 1.70E-02 CF Ll 1972-02 1/31/2007 1-131 -2.70E-03 3.OOE-03 1.30E-02 CF L12030-02 2/13/2007 1-131 6.30E-03 5.1OE-03 1.70E-02 CF L12084-02 2/28/2007 1-131 8.50E-03 5.80E-03 1.90E-02 CF L12139-02 3/14/2007 1-131 -6.OOE-03 3.50E-03 1.60E-02 CF L12207-02 3/28/2007 1-131 -2.30E-03 4.OOE-03 1.60E-02 CF L12268-02 4/11/2007 1-131 -2.30E-03 6.40E-03 2.50E-02 CF L12336-02 4/25/2007 1-131 -9.OOE-04 4.90E-03 1.90E-02 CF L12400-02 5/9/2007 1-131 9.OOE-04 3.80E-03 1.50E-02 CF L12461-02 5/23/2007 1-131 1.OOE-03 5.OOE-03 1.90E-02 CF L12512-02 6/6/2007 1-131 1.20E-03 5.80E-03 2.20E-02 CF L12572-02 6/20/2007 1-131 -2.70E-03 2.90E-03 1.50E-02 CF L12645-02 7/3/2007 1-131 -5.30E-03 5.90E-03 2.50E-02 CF L12700-02 7/18/2007 1-131 2.20E-03 5.30E-03 2.OOE-02 CF L12769-02 8/1/2007 1-131 -4.30E-03 5.90E-03 2.50E-02 CF L12839-02 8/15/2007 1-131 1.80E-03 5.40E-03 2.20E-02 CF L12898-02 8/29/2007 1-131 6.40E-03 5.40E-03 1.90E-02 CF L12963-02 9/12/2007 1-131 5.30E-03 6.20E-03 2.20E-02 CF L13018-02 9/26/2007 1-131 1.40E-03 5.90E-03 2.30E-02 CF L13074-02 10/10/2007 1-131 2.90E-03 2.90E-03 1.OOE-02 CF L13156-02 10/24/2007 1-131 -4.80E-03 5.20E-03 2.1OE-02 CF L13206-02 11/7/2007 1-131 -8.10E-03 3.50E-03 1.80E-02 CF L13273-02 11/20/2007 1-131 -1.40E-03 7.70E-03 3.OOE-02 CF L13330-02 12/5/2007 1-131 -5.60E-03 7.30E-03 3.1OE-02 CF L13395-02 12/19/2007 1-131 1.OOE-02 1.1OE-02 3.80E-02 CF LI 1889-03 1/3/2007 1-131 -1.00E-03 4.90E-03 1.90E-02 CF L11936-03 1/17/2007 1-131 -5.1OE-03 5.20E-03 2.20E-02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-120-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF Li1972-03 1/31/2007 1-131 1.40E-03 2.80E-03 1.00E-02 CF L12030-03 2/13/2007 1-131 6.30E-03 5.60E-03 1.90E-02 CF L12084-03 2/28/2007 1-131 2.OOE-03 5.1OE-03 1.90E-02 CF L12139-03 3/14/2007 1-131 8.OOE-04 4.1OE-03 1.50E-02 CF L12207-03 3/28/2007 1-131 5.40E-03 3.70E-03 1.20E-02 CF L12268-03 4/11/2007 1-131 -2.20E-03 5.70E-03 2.20E-02 CF L12336-03 4/25/2007 1-131 2.OOE-03 4.80E-03 1.80E-02 CF L12400-03 5/9/2007 1-131 -1.00E-03 5.OOE-03 2.OOE-02 CF L12461-03 5/23/2007 1-131 -3.10E-03 3.80E-03 1.70E-02 CF L12512-03 6/6/2007 1-131 -4.50E-03 6.10E-03 2.70E-02 CF L12572-03 6/20/2007 1-131 -1.60E-03 4.30E-03 1.70E-02 CF L12645-03 7/3/2007 1-131 -9.60E-03 4.60E-03 2.30E-02 CF L12700-03 7/18/2007 1-131 -3.30E-03 5.60E-03 2.20E-02 CF L12769-03 8/1/2007 1-131 -4.40E-03 5.70E-03 2.50E-02 CF L12839-03 8/15/2007 1-131 1.80E-03 8.OOE-03 3.OOE-02 CF L12898-03 8/29/2007 1-131 1.16E-02 5.40E-03 1.60E-02 CF L12963-03 9/12/2007 1-131 6.90E-03 5.70E-03 1.90E-02 CF L13018-03 9/26/2007 1-131 8.50E-03 6.30E-03 2.10E-02 CF L13074-03 10/10/2007 1-131 0.OOE+00 3.80E-03 1.50E-02 CF L13156-03 10/24/2007 1-131 3.90E-03 4.70E-03 1.70E-02 CF L13206-03 11/7/2007 1-131 0.OOE+00 3.90E-03 1.50E-02 CF L13273-03 11/20/2007 1-131 4.30E-03 7.40E-03 2.70E-02 CF L13330-03 12/5/2007 1-131 5.50E-03 8.50E-03 3.1OE-02 CF L13395-03 12/21/2007 1-131 -4.1 OE-03 7.90E-03 3.1OE-02 CF LI 1889-04 1/3/2007 1-131 5.60E-03 5.80E-03 2.OOE-02 CF Li1936-04 1/17/2007 1-131 -1.00E-03 5.20E-03 2.OOE-02 CF Li1972-04 1/31/2007 1-131 -2.70E-03 3.OOE-03 1.30E-02 CF L12030-04 2/13/2007 1-131 3.30E-03 5.80E-03 2.1OE-02 CF L12084-04 2/28/2007 1-131 5.OOE-03 5.50E-03 1.90E-02 CF L12139-04 3/14/2007 1-131 8.OOE-04 4.60E-03 1.70E-02 CF L12207-04 3/28/2007 1-131 -3.10E-03 3.60E-03 1.50E-02 CF L12268-04 4/11/2007 1-131 -1.10E-03 4.60E-03 1.90E-02 CF L12336-04 4/25/2007 1-131 0.OOE+00 4.60E-03 1.80E-02 CF L12400-04 5/9/2007 1-131 -3.80E-03 4.40E-03 1.80E-02 CF L12461-04 5/23/2007 1-131 -2.10E-03 4.60E-03 1.90E-02 CF L12512-04 6/6/2007 1-131 -1.80E-03 5.40E-03 2. 1OE-02 CF L12572-04 6/20/2007 1-131 9.OOE-04 4.20E-03 1.60E-02 CF L12645-04 7/3/2007 1-131 -1.40E-03 7.30E-03 2.80E-02 CF L12700-04 7/18/2007 1-131 -1.10E-03 5.OOE-03 2.OOE-02 CF L12769-04 8/1/2007 1-131 -4.50E-03 6.50E-03 2.70E-02 CF L12839-04 8/15/2007 1-131 -9.40E-03 7.30E-03 3.30E-02 CF L12898-04 8/29/2007 1-131 0.OOE+00 6.OOE-03 2.40E-02 CF L12963-04 9/12/2007 1-131 -2.80E-03 6.30E-03 2.60E-02 CF L13018-04 9/26/2007 1-131 -4.40E-03 6.1 OE-03 2.60E-02 CF L13074-04 10/10/2007 1-131 -8.OOE-04 3.50E-03 1.40E-02 CF L13156-04 10/24/2007 1-131 0.OOE+00 5.80E-03 2.20E-02 CF L13206-04 11/7/2007 1-131 -2.20E-03 5.10E-03 2.OOE-02 CF L13273-04 11/20/2007 1-131 -4.60E-03 6.70E-03 2.80E-02 CF L13330-04 12/5/2007 1-131 6.OOE-03 9.60E-03 3.50E-02 CF L13395-04 12/19/2007 1-131 -1.29E-02 9.90E-03 4.10E-02 CF Li1889-05 1/3/2007 1-131 4.80E-03 4.60E-03 1.60E-02 CF LI 1936-05 1/17/2007 1-131 -2.90E-03 4.70E-03 1.90E-02 CF Li1972-05 1/31/2007 1-131 -2.60E-03 2.70E-03 1.20E-02 CF L12030-05 2/13/2007 1-131 1.OOE-03 5.60E-03 2.10E-02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-121-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF L12084-05 2/28/2007 1-131 3.70E-03 4.90E-03 1.80E-02 CF L12139-05 3/14/2007 1-131 5.OOE-03 2.90E-03 9.30E-03 CF L12207-05 3/28/2007 1-131 -6.50E-03 3.60E-03 1.60E-02 CF L12268-05 4/11/2007 1-131 3.90E-03 3.40E-03 1.20E-02 CF L12336-05 4/25/2007 1-131 9.OOE-04 5.1OE-03 1.90E-02 CF L12400-05 5/9/2007 1-131 -4.OOE-03 4.90E-03 2.OOE-02 CF L12461-05 5/23/2007 1-131 4.40E-03 5.40E-03 1.90E-02 CF L12512-05 6/6/2007 1-131 1.60E-03 4.90E-03 2.OOE-02 CF L12572-05 6/20/2007 1-131 9.OOE-03 5.OOE-03 1.60E-02 CF L12645-05 7/3/2007 1-131 -4.30E-03 6.20E-03 2.60E-02 CF LI12700-05 7/18/2007 1-131 5.90E-03 5.40E-03 1.90E-02 CF L12769-05 8/1/2007 1-131 4.90E-03 6.30E-03 2.30E-02 CF L12839-05 8/15/2007 1-131 -5.80E-03 9.20E-03 3.70E-02 CF L12898-05 8/29/2007 1-131 -1.50E-03 6.60E-03 2.60E-02 CF L12963-05 9/12/2007 1-131 0.OOE+00 5.60E-03 2.20E-02 CF L13018-05 9/26/2007 1-131 -4.50E-03 6.90E-03 2.80E-02 CF L13074-05 10/10/2007 1-131 1.50E-03 3.50E-03 1.30E-02 CF L13156-05 10/24/2007 1-131 -3.10E-03 4.OOE-03 1.70E-02 CF L13206-05 11/7/2007 1-131 -5.30E-03 4.70E-03 2.OOE-02 CF L13273-05 11/20/2007 1-131 -9.OOE-03 7.OOE-03 3.OOE-02 CF L13330-05 12/5/2007 1-131 -5.OOE-03 1.OOE-02 4.20E-02 CF L13395-05 12/19/2007 1-131 0.OOE+00 9.90E-03 3.70E-02 CF Li1889-06 1/3/2007 1-131 -3.30E-03 5.30E-03 2.1OE-02 CF Li1936-06 1/17/2007 1-131 -1.10E-03 5.70E-03 2.20E-02 CF Li1972-06 1/31/2007 1-131 -7.OOE-04 3.40E-03 1.40E-02 CF L12030-06 2/13/2007 1-131 0.OOE+00 6.40E-03 2.40E-02 CF L12084-06 2/28/2007 1-131 3.30E-03 6.OOE-03 2.20E-02 CF L12139-06 3/14/2007 1-131 -4.20E-03 4.10E-03 1.70E-02 CF L12207-06 3/28/2007 1-131 1.70E-03 4.80E-03 1.80E-02 CF L12268-06 4/11/2007 1-131 -3.70E-03 3.70E-03 1.70E-02 CF L12336-06 4/25/2007 1-131 9.40E-03 5.80E-03 1.90E-02 CF L12400-06 5/9/2007 1-131 -1.00E-03 4.60E-03 1.80E-02 CF L12461-06 5/23/2007 1-131 2.OOE-03 4.80E-03 1.80E-02 CF L12512-06 6/6/2007 1-131 -1.20E-03 6.70E-03 2.70E-02 CF L12572-06 6/20/2007 1-131 3.OOE-04 4.80E-03 1.80E-02 CF L12645-06 7/3/2007 1-131 0.OOE+00 6.1OE-03 2.40E-02 CF L12700-06 7/18/2007 1-131 -1.10E-03 4.20E-03 1.70E-02 CF L12769-06 8/1/2007 1-131 -6.20E-03 5.80E-03 2.60E-02 CF L12839-06 8/15/2007 1-131 -7.10E-03 5.OOE-03 2.50E-02 CF L12898-06 8/29/2007 1-131 4.10E-03 5.OOE-03 1.80E-02 CF L12963-06 9/12/2007 1-131 2.60E-03 5.20E-03 1.90E-02 CF L13018-06 9/26/2007 1-131 4.10E-03 4.50E-03 1.60E-02 CF L13074-06 10/10/2007 1-131 -3.50E-03 2.70E-03 1.20E-02 CF L13156-06 10/24/2007 1-131 -2.80E-03 4.70E-03 1.90E-02 CF L13206-06 11/7/2007 1-131 4.80E-03 3.70E-03 1.30E-02 CF L13273-06 11/20/2007 1-131 -7.OOE-03 6.80E-03 2.80E-02 CF Li3330-06 12/5/2007 1-131 -2.15E-02 6.70E-03 3.50E-02 CF L13395-06 12/21/2007 1-131 -6.70E-03 7.20E-03 2.90E-02 CF Li1889-07 1/3/2007 1-131 -8.90E-03 5.30E-03 2.30E-02 CF Li1936-07 1/17/2007 1-131 -6.OOE-03 5.50E-03 2.20E-02 CF Li1972-07 1/31/2007 1-131 1.30E-03 2.80E-03 1.1OE-02 CF L12030-07 2/13/2007 1-131 0.OOE+00 4.80E-03 1.90E-02 CF L12084-07 2/28/2007 1-131 1.90E-03 4.10E-03 1.50E-02 CF L12139-07 3/14/2007 1-131 -7.50E-03 4.40E-03 1.90E-02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-122-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/m3) (pCi/m3) (pCi/m3)

CF 8 L12207-07 3/28/2007 1-131 0.OOE+00 4.OOE-03 1.60E-02 CF 8 L12268-07 4/11/2007 1-131 4.OOE-03 4.70E-03 1.70E-02 CF 8 L12336-07 4/25/2007 1-131 -9.OOE-04 5.80E-03 2.20E-02 CF 8 L12400-07 5/9/2007 1-131 6.70E-03 4.90E-03 1.70E-02 CF 8 L12461-07 5/23/2007 1-131 1.00E-03 4.10E-03 1.60E-02 CF 8 L12512-07 6/6/2007 1-131 1.1OE-03 6.20E-03 2.30E-02 CF 8 L12572-07 6/20/2007 1-131 -8.OOE-04 4.1OE-03 1.60E-02 CF 8 L12645-07 7/3/2007 1-131 6.60E-03 6.90E-03 2.40E-02 CF 8 L12700-07 7/18/2007 1-131 3.30E-03 5.50E-03 2.OOE-02 CF 8 L12769-07 8/1/2007 1-131 -4.60E-03 6.70E-03 2.80E-02 CF 8 L12839-07 8/15/2007 1-131 -7.20E-03 5.10E-03 2.50E-02 CF 8 L12898-07 8/29/2007 1-131 -1.01E-02 5.60E-03 2.60E-02 CF 8 L12963-07 9/12/2007 1-131 -2.60E-03 4.90E-03 2.1OE-02 CF 8 L13018-07 9/26/2007 1-131 -8.40E-03 7.20E-03 3.OOE-02 CF 8 L13074-07 10/10/2007 1-131 1.40E-03 3.40E-03 1.30E-02 CF 8 L13156-07 10/24/2007 1-131 2.80E-03 4.50E-03 1.60E-02 CF 8 L13206-07 11/7/2007 1-131 1.OOE-03 4.1OE-03 1.60E-02 CF 8 L13273-07 11/20/2007 1-131 -4.20E-03 6.70E-03 2.70E-02 CF 8 L13330-07 12/5/2007 1-131 3.60E-03 8.1OE-03 3.OOE-02 CF 8 L13395-07 12/19/2007 1-131 3.40E-03 7.90E-03 2.90E-02 CF 9 L11889-08 1/3/2007 1-131 -5.OOE-03 5.20E-03 2.1OE-02 CF 9 L11936-08 1/17/2007 1-131 3.OOE-03 4.80E-03 1.70E-02 CF 9 L11972-08 1/31/2007 1-131 3.40E-03 3.1OE-03 1.1OE-02 CF 9 L12030-08 2/13/2007 1-131 8.40E-03 5.60E-03 1.80E-02 CF 9 L12084-08 2/28/2007 1-131 -2.90E-03 4.20E-03 1.70E-02 CF 9 L12139-08 3/14/2007 1-131 -1.90E-03 4.40E-03 1.80E-02 CF 9 L12207-08 3/28/2007 1-131 -1.90E-03 5.1OE-03 2.OOE-02 CF 9 L12268-08 4/11/2007 1-131 -4.1OE-03 4.70E-03 2.OOE-02 CF 9 L12336-08 4/25/2007 1-131 5.40E-03 4.20E-03 1.40E-02 CF 9 L12400-08 5/9/2007 1-131 -5.80E-03 4.1OE-03 1.80E-02 CF 9 L12461-08 5/23/2007 1-131 -1.90E-03 4.OOE-03 1.60E-02 CF 9 L12512-08 6/6/2007 1-131 -4.40E-03 5.1OE-03 2.40E-02 CF 9 L12572-08 6/20/2007 1-131 -2.30E-03 5.20E-03 2.1OE-02 CF 9 L12645-08 7/3/2007 1-131 4.OOE-03 5.50E-03 2.OOE-02 CF 9 L12700-08 7/18/2007 1-131 -3.30E-03 4.OOE-03 1.70E-02 CF 9 L12769-08 8/1/2007 1-131 3.10E-03 4.90E-03 1.90E-02 CF 9 L12839-08 8/15/2007 1-131 4.OOE-03 5.70E-03 2.20E-02 CF 9 L12898-08 8/29/2007 1-131 -4.60E-03 4.30E-03 1.80E-02 CF 9 L12963-08 9/12/2007 1-131 -1.30E-03 4.40E-03 1.90E-02 CF 9 L13018-08 9/26/2007 1-131 -1.40E-03 5.10E-03 2.1OE-02 CF 9 L13074-08 10/10/2007 1-131 2.80E-03 3.60E-03 1.30E-02 CF 9 L13156-08 10/24/2007 1-131 5.OOE-03 5.40E-03 1.90E-02 CF 9 L13206-08 11/7/2007 1-131 9.1OE-03 5.30E-03 1.70E-02 CF 9 L13273-08 11/20/2007 1-131 2.90E-03 7.1OE-03 2.60E-02 CF 9 L13330-08 12/5/2007 1-131 -3.80E-03 5.30E-03 2.50E-02 CF 9 L13395-08 12/19/2007 1-131 -3.50E-03 9.60E-03 3.70E-02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-123-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH L12094-01 2/20/2007 AcTh-228 -1.40E+01 2.60E+01 9.70E+0 1 FH L12094-01 2/20/2007 Ag-108m -3.80E+00 5.20E+00 1.90E+01 FH L12094-01 2/20/2007 Ag-l 0m -2.30E+00 7.90E+00 3.OOE+01 FH L12094-01 2/20/2007 Ba-140 3.OOE+00 1.20E+01 4.50E+01 FH L12094-01 2/20/2007 Be-7 6.OOE+00 5.70E+01 2.OOE+02 FH L12094-01 2/20/2007 Ce-141 1.1OE+0 1 1.5OE+01 5.20E+01 FH L12094-01 2/20/2007 Ce-144 1.00E+00 3.50E+01 1.20E+02 FH L12094-01 2/20/2007 Co-57 4.50E+00 4.40E+00 1.50E+01 FH L12094-01 2/20/2007 Co-58 -8.90E+00 7.10E+00 2.80E+01 FH L12094-01 2/20/2007 Co-60 8.80E+00 7.50E+00 2.50E+01 FH L12094-01 2/20/2007 Cr-51 2.30E+01 7.30E+OI 2.50E+02 FH L12094-01 2/20/2007 Cs-134 6.20E+00 6.60E+00 2.30E+OI FH L12094-01 2/20/2007 Cs-137 9.OOE-01 7.OOE+00 2.50E+01 FH L12094-01 2/20/2007 Fe-59 -1.00E+00 1.70E+01 6.30E+01 FH L12094-01 2/20/2007 1-131 -4.OOE+00 2.1OE+O1 7.40E+0 I FH L12094-01 2/20/2007 K-40 2.84E+03 2.1OE+02 3.80E+02 FH L12094-01 2/20/2007 La-140 3.OOE+00 1.30E+01 5.1OE+O1 FH L12094-01 2/20/2007 Mn-54 7.20E+00 6.90E+00 2.30E+O1 FH L12094-01 2/20/2007 Nb-95 1.90E+00 8.60E+00 3.1OE+OI FH L12094-01 2/20/2007 Ru-103 -3.OOE+00 7.90E+00 2.90E+01 FH L12094-01 2/20/2007 Ru-106 -4.70E+01 6.60E+OI 2.40E+02 FH L12094-01 2/20/2007 Sb-124 6.OOE+00 1.40E+01 5.1OE+OI FH L12094-01 2/20/2007 Sb-125 -1.60E+01 1.60E+01 5.90E+01 FH L12094-01 2/20/2007 Se-75 -6.OOE-01 8.20E+00 2.90E+01 FH L12094-01 2/20/2007 Zn-65 -2.30E+01 1.70E+01 6.50E+01 FH L12094-01 2/20/2007 Zr-95 1.20E+01 1.20E+01 4.20E+01 FH L12455-01 5/22/2007 AcTh-228 5.OOE+00 3.70E+01 1.50E+02 FH L12455-01 5/22/2007 Ag- 108m 1.60E+01 1.20E+01 3.90E+01 FH L12455-01 5/22/2007 Ag-110m -4.OOE+00 1.70E+01 6.90E+01 FH L12455-01 5/22/2007 Ba-140 3.60E+0 1 2.80E+01 9.60E+01 FH L12455-01 5/22/2007 Be-7 -1.iOE+02 1.OOE+02 4.30E+02 FH L12455-01 5/22/2007 Ce- 141 1.00E+01 2.20E+01 7.80E+01 FH L12455-01 5/22/2007 Ce-144 1.33E+02 6.70E+01 2.1OE+02 FH L12455-01 5/22/2007 Co-57 -3.40E+00 7.90E+00 3.OOE+01 FH L12455-01 5/22/2007 Co-58 -1.40E+01 1.20E+01 5.40E+01 FH L12455-01 5/22/2007 Co-60 4.10E+01 1.60E+01 4.40E+01 FH L12455-01 5/22/2007 Cr-51 1.30E+02 1.20E+02 4.20E+02 FH L12455-01 5/22/2007 Cs-134 -2.OOE+01 1.30E+01 6.OOE+01 FH L12455-01 5/22/2007 Cs-137 7.OOE+00 1.40E+01 5.20E+01 FH L12455-01 5/22/2007 Fe-59 -3.60E+0 1 3.80E+01 1.60E+02 FH L12455-01 5/22/2007 1-131 6.70E+0 1 6.OOE+01 2.OOE+02 FH L12455-01 5/22/2007 K-40 3.54E+03 4.20E+02 7.1OE+02 FH L12455-01 5/22/2007 La-140 4.1OE+01 3.30E+01 1.10E+02 FH L12455-01 5/22/2007 Mn-54 3.OOE+00 7.90E+00 3.20E+01 FH L12455-01 5/22/2007 Nb-95 1.10E+01 1.50E+01 5.5OE+OI FH L12455-01 5/22/2007 Ru-103 -1.30E+01 1.40E+01 5.90E+01 FH L12455-01 5/22/2007 Ru- 106 0.OOE+00 1.1OE+02 4.30E+02 FH L12455-01 5/22/2007 Sb- 124 6.1OE+01 3.30E+01 9.60E+01 FH L12455-01 5/22/2007 Sb-125 -4.20E+01 2.90E+OI 1.30E+02 FH L12455-01 5/22/2007 Se-75 2.OOE+00 1.40E+01 5.1OE+OI FH L12455-01 5/22/2007 Zn-65 -3.OOE+01 3.60E+01 1.50E+02 FH L12455-01 5/22/2007 Zr-95 1.20E+01 2.80E+01 1.00E+02 FH L12887-01 8/27/2007 AcTh-228 4.20E+01 4.90E+01 1.70E+02 FH L12887-01 8/27/2007 Ag-108m 1.29E+01 8.50E+00 2.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-124-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH L12887-01 8/27/2007 Ag-Il0mi -4.OOE+00 1.50E+01 6.20E+01 FH L12887-01 8/27/2007 Ba-140 -4.1OE+01 2.40E+01 1.50E+02 FH L12887-01 8/27/2007 Be-7 -6.OOE+01 9.60E+01 3.90E+02 FH L12887-01 8/27/2007 Ce-141 -2.30E+0 1 1.60E+01 6.20E+01 FH L12887-01 8/27/2007 Ce-144 -7.40E+0 1 4.OOE+01 1.60E+02 FH L12887-01 8/27/2007 Co-57 5.40E+00 5.OOE+00 1.70E+01 FH L12887-01 8/27/2007 Co-58 -7.OOE+00 1.30E+01 5.50E+01 FH L12887-01 8/27/2007 Co-60 3.OOE+00 9.40E+00 4.OOE+01 FH L12887-01 8/27/2007 Cr-51 8.OOE+01 1.1OE+02 4.OOE+02 FH L12887-01 8/27/2007 Cs-134 1.90E+01 1.1OE+0I 3.50E+01 FH L12887-01 8/27/2007 Cs-137 -2.50E+00 9.OOE+00 3.70E+01 FH L12887-01 8/27/2007 Fe-59 5.OOE+01 2.60E+01 7.70E+01 FH L12887-01 8/27/2007 1-131 -2.30E+01 4.70E+01 1.90E+02 FH L12887-01 8/27/2007 K-40 2.92E+03 3.90E+02 7.40E+02 FH L12887-01 8/27/2007 La-140 -4.80E+0l 2.70E+01 1.70E+02 FH L12887-01 8/27/2007 Mn-54 -2.30E+00 9.40E+00 3.90E+01 FH L12887-01 8/27/2007 Nb-95 -5.OOE+00 1.60E+01 6.50E+01 FH L12887-01 8/27/2007 Ru-103 1.30E+01 1.30E+01 4.70E+01 FH L12887-01 8/27/2007 Ru-106 4.20E+01 7.90E+01 3.OOE+02 FH L12887-01 8/27/2007 Sb-124 2.60E+01 2.60E+01 9.50E+01 FH L12887-01 8/27/2007 Sb-125 3.5OE+01 2.30E+01 7.40E+0I FH L12887-01 8/27/2007 Se-75 -2.58E+01 9.60E+00 4.40E+0 I FH L12887-01 8/27/2007 Zn-65 3.50E+01 2.70E+01 9.30E+01 FH L12887-01 8/27/2007 Zr-95 -6.OOE+00 2.20E+01 9.OOE+01 FH L13305-01 11/26/2007 AcTh-228 2.20E+01 5.30E+01 2.10E+02 FH L13305-01 11/26/2007 Ag-108m 0.OOE+00 9.80E+00 4.10E+01 FH L13305-01 11/26/2007 Ag-Il0m -2.50E+01 1.60E+01 9.OOE+01 FH L13305-01 11/26/2007 Ba-140 -3.20E+01 3.20E+01 1.70E+02 FH L13305-01 11/26/2007 Be-7 1.30E+02 1.30E+02 4.70E+02 FH L13305-01 11/26/2007 Ce- 141 7.OOE+00 1.60E+01 6.OOE+01 FH L13305-01 11/26/2007 Ce- 144 -2.20E+01 5.50E+01 2.20E+02 FH L13305-01 11/26/2007 Co-57 6.50E+00 6.20E+00 2.20E+01 FH L13305-01 11/26/2007 Co-58 2.10E+01 1.40E+01 4.30E+01 FH L13305-01 11/26/2007 Co-60 -1.1OE+01 1.80E+01 8.80E+01 FH L13305-01 11/26/2007 Cr-51 -1.00E+02 1.20E+02 5.OOE+02 FH L13305-01 11/26/2007 Cs-134 1.20E+01 2.20E+01 8.20E+01 FH L13305-01 11/26/2007 Cs-137 -1.90E+01 1.40E+01 6.70E+01 FH L13305-01 11/26/2007 Fe-59 4.OOE+01 3.50E+01 1.20E+02 FH L13305-01 11/26/2007 1,131 3.90E+01 3.10E+01 1.1 OE+02 FH L13305-01 11/26/2007 K-40 3.32E+03 5.40E+02 8.30E+02 FH L13305-01 11/26/2007 La-140 -3.20E+01 3.20E+01 1.70E+02 FH L13305-01 11/26/2007 Mn-54 2.40E+01 1.60E+01 5.20E+01 FH L13305-01 11/26/2007 Nb-95 -2.70E+01 2.70E+01 1.1 OE+02 FH L13305-01 11/26/2007 Ru-103 -1.30E+01 1.70E+01 7.30E+01 FH L13305-01 11/26/2007 Ru-106 1.20E+02 1.20E+02 4.30E+02 FH L13305-01 11/26/2007 Sb-124 4.30E+01 4.30E+01 1.60E+02 FH L13305-01 11/26/2007 Sb-125 -1.90E+01 4.40E+01 1.80E+02 FH L13305-01 11/26/2007 Se-75 -9.OOE+00 1.40E+01 5.80E+01 FH L13305-01 11/26/2007 Zn-65 -5.30E+01 3.20E+01 1.70E+02 FH L13305-01 11/26/2007 Zr-95 7.1OE+01 3.30E+01 9.30E+01 FH L12455-02 5/22/2007 AcTh-228 3.60E+01 3.90E+01 1.40E+02 FH L12455-02 5/22/2007 Ag-108m 0.OOE+00 7.60E+00 2.80E+01 FH L12455-02 5/22/2007 Ag-il0m 6.OOE+00 1.20E+01 4.40E+01 FH L12455-02 5/22/2007 Ba-140 1.80E+01 1.80E+01 6.70E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-125-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH 53 L12455-02 5/22/2007 Be-7 2.80E+01 8.20E+01 3.OOE+02 FH 53 L12455-02 5/22/2007 Ce-141 -2.60E+01 1.50E+01 5.80E+01 FH 53 L12455-02 5/22/2007 Ce-144 -2.OOE+00 4.30E+0I 1.50E+02 FH 53 L12455-02 5/22/2007 Co-57 1.50E+01 5.60E+00 1.70E+01 FH 53 L12455-02 5/22/2007 Co-58 -1.50E+01 1.00E+01 4.40E+01 FH 53 L12455-02 5/22/2007 Co-60 3.30E+01 1.1 OE+0 1 2.70E+01 FH 53 L12455-02 5/22/2007 Cr-51 0.OOE+00 1.1OE+02 3.80E+02 FH 53 L12455-02 5/22/2007 Cs-134 -1.74E+01 7.50E+00 3.70E+01 FH 53 L12455-02 5/22/2007 Cs-137 -8.OOE+00 1.00E+01 4.OOE+01 FH 53 L12455-02 5/22/2007 Fe-59 2.30E+0I 3.20E+01 1.1OE+02 FH 53 L12455-02 5/22/2007 1-131 2.OOE+01 4.40E+01 1.60E+02 FH 53 L12455-02 5/22/2007 K-40 2.46E+03 3.1OE+02 6.OOE+02 FH 53 L12455-02 5/22/2007 La-140 2.1OE+0I 2.10E+01 7.80E+01 FH 53 L12455-02 5/22/2007 Mn-54 2.60E+01 1.10E+01 3.30E+0I FH 53 L12455-02 5/22/2007 Nb-95 -4.OOE+00 1.40E+01 5.40E+01 FH 53 L12455-02 5/22/2007 Ru-103 -6.OOE+00 1.00E+01 4.1OE+01 FH 53 L12455-02 5/22/2007 Ru-106 -1.29E+02 8.40E+01 3.50E+02 FH 53 L12455-02 5/22/2007 Sb-124 9.OOE+00 2.OOE+01 8.20E+01 FH 53 L12455-02 5/22/2007 Sb-125 -2.1OE+0I 2.30E+01 8.90E+01 FH 53 L12455-02 5/22/2007 Se-75 2.20E+01 1.00E+01 3.20E+01 FH 53 L12455-02 5/22/2007 Zn-65 2.OOE+01 2.30E+01 8.20E+01 FH 53 L12455-02 5/22/2007 Zr-95 -1.40E+01 1.40E+01 6.30E+0I FH 53 L12887-02 8/21/2007 AcTh-228 1.17E+02 6.10E+01 1.80E+02 FH 53 L12887-02 8/21/2007 Ag- 108m -2.30E+00 9.10E+00 3.80E+01 FH 53 L12887-02 8/21/2007 Ag-110m 0.OOE+00 2.OOE+01 8.20E+01 FH 53 L12887-02 8/21/2007 Ba-140 1.1 9E+02 6.OOE+01 8.1OE+01 FH 53 L12887-02 8/21/2007 Be-7 0.OOE+00 1.40E+02 5.60E+02 FH 53 L12887-02 8/21/2007 Ce-141 -7.OOE+00 2.60E+01 9.90E+01 FH 53 L12887-02 8/21/2007 Ce-144 -5.90E+01 6.90E+01 2.70E+02 FH 53 L12887-02 8/21/2007 Co-57 -8.OOE+00 8.10E+00 3120E+01 FH 53 L12887-02 8/21/2007 Co-58 1.20E+01 2.20E+01 8.30E+01 FH 53 L12887-02 8/21/2007 Co-60 1.80E+01 1.1OE+0I 1.60E+01 FH 53 L12887-02 8/21/2007 Cr-51 -2.90E+02 2.OOE+02 8.20E+02 FH 53 L12887-02 8/21/2007 Cs-134 -5.OOE+00 1.50E+01 6.40E+01 FH 53 L12887-02 8/21/2007 Cs-137 3.90E+01 1.80E+01 5.50E+01 FH 53 L12887-02 8/21/2007 Fe-59 -2.80E+01 4.40E+01 2.OOE+02 FH 53 L12887-02 8/21/2007 1-131 3.OOE+01 1.50E+02 5.70E+02 FH 53 L12887-02 8/21/2007 K-40 2.93E+03 5.OOE+02 1.1OE+03 FH 53 L12887-02 8/21/2007 La- 140 1.37E+02 6.80E+01 9.30E+01 FH 53 L12887-02 8/21/2007 Mn-54 1.20E+01 1.60E+01 5.90E+01 FH 53 L12887-02 8/21/2007 Nb-95 -2.OOE+00 2.OOE+01 8.40E+01 FH 53 L12887-02 8/21/2007 Ru-103 5.OOE+00 1.20E+01 5.OOE+01 FH 53 L12887-02 8/21/2007 Ru-106 -8.OOE+01 1.40E+02 5.80E+02 FH 53 L12887-02 8/21/2007 Sb-124 8.40E+O 1 4.20E+01 5.70E+01 FH, 53 L12887-02 8/21/2007 Sb-125 8.OOE+00 3.OOE+01 1.20E+02 FH 53 L12887-02 8/21/2007 Se-75 1.50E+01 1.50E+01 5.1OE+01 FH 53 L12887-02 8/21/2007 Zn-65 -4.40E+0 1 3.50E+01 1.60E+02 FH 53 L12887-02 8/21/2007 Zr-95 -1.20E+01 2.30E+01 1.1 OE+02 FH 53 L13305-02 11/26/2007 AcTh-228 2.1OE+0I 7.60E+01 3.OOE+02 FH 53 L13305-02 11/26/2007 Ag-108m -1.30E+01 1.1OE+01 5.10E+01 FH 53 L13305-02 11/26/2007 Ag-ll0m 3.20E+01 2.50E+01 8.60E+01 FH 53 L13305-02 11/26/2007 Ba-140 0.OOE+00 2.40E+01 1.30E+02 FH 53 L13305-02 11/26/2007 Be-7 1.40E+02 1.1OE+02 3.90E+02 FH 53 L13305-02 11/26/2007 Ce-141 1.90E+01 2.1OE+01 7.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-126-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH 53 L13305-02 11/26/2007 Ce-144 -1.16E+02 7.50E+01 3.1OE+02 FH 53 L13305-02 11/26/2007 Co-57 1.53E+01 9.20E+00 3.OOE+01 FH 53 L13305-02 11/26/2007 Co-58 2.OOE+00 1.30E+01 5.80E+01 FH 53 L13305-02 11/26/2007 Co-60 -2.OOE+01 2.20E+01 1.00E+02 FH 53 L13305-02 11/26/2007 Cr-51 3.OOE+01 1.00E+02 4.OOE+02 FH 53 L13305-02 11/26/2007 Cs-134 -1.30E+01 1.90E+01 8.40E+01 FH 53 L13305-02 11/26/2007 Cs-137 -3.OOE+00 1.60E+01 6.80E+01 FH 53 L13305-02 11/26/2007 Fe-59 1.40E+01 3.70E+01 1.50E+02 FH 53 L13305-02 11/26/2007 1-131 2.30E+0 1 3.30E+01 1.20E+02 FH 53 L13305-02 11/26/2007 K-40 3.37E+03 5.80E+02 1.00E+03 FH 53 L13305-02 11/26/2007 La-140 0.OOE+00 2.40E+01 1.30E+02 FH 53 L13305-02 11/26/2007 Mn-54 -9.OOE+00 1.00E+01 5.50E+01 FH 53 L13305-02 11/26/2007 Nb-95 1.60E+01 2.OOE+01 7.40E+01 FH 53 L13305-02 11/26/2007 Ru-103 -2.70E+0 1 1.80E+01 8.30E+01 FH 53 L13305-02 11/26/2007 Ru-106 1.00E+01 1.40E+02 5.70E+02 FH 53 L13305-02 11/26/2007 Sb-124 2.30E+01 2.30E+01 6.20E+01 FH 53 L13305-02 11/26/2007 Sb-125 5.10E+01 4.90E+01 1.70E+02 FH 53 L13305-02 11/26/2007 Se-75 -4.40E+01 1.60E+01 7.70E+01 FH 53 L13305-02 11/26/2007 Zn-65 1.12E+02 4.40E+01 1.00E+02 FH 53 L13305-02 11/26/2007 Zr-95 -1.70E+01 2.90E+01 1.30E+02 7

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-127-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

HA 4 L12533-01 6/6/2007 AcTh-228 -2.60E+01 3.80E+01 1.70E+02 HA 4 L12533-01 6/6/2007 Ag-108m 1.00E+01 8.20E+00 2.80E+01 HA 4 L12533-01 6/6/2007 Ag-110m 0.OOE+00 1.70E+01 7.OOE+01 HIA 4 L12533-01 6/6/2007 Ba-140 -2.60E+01 1.50E+01 9.30E+01 HA 4 L12533-01 6/6/2007 Be-7 4.20E+01 9.OOE+01 3.30E+02 HA 4 L12533-01 6/6/2007 Ce-141 -2.OOE+00 1.50E+01 5.50E+01 HIA 4 L12533-01 6/6/2007 Ce-144 5.30E+01 4.50E+01 1.50E+02 HA 4 L12533-01 6/6/2007 Co-57 -2.40E+00 5.50E+00 2.10E+01 HA 4 L12533-01 6/6/2007 Co-58 -2.OOE+00 1.1OE+01 4.50E+01 HA 4 L12533-01 6/6/2007 Co-60 9.OOE+00 1.30E+01 4.90E+01 HA 4 L12533-01 6/6/2007 Cr-51 -6.70E+01 7.OOE+01 3.1OE+02 HA. 4 L12533-01 6/6/2007 Cs-134 0.OOE+00 1.40E+01 5.70E+0 1 HA 4 L12533-01 6/6/2007 Cs-137 0.OOE+00 1.1 OE+0 1 4.30E+01 HA 4 L12533-01 6/6/2007 Fe-59 -3.40E+01 2.40E+0 1 1.20E+02 HA 4 L12533-01 6/6/2007 1-131 -1.20E+01 1.60E+01 7.OOE+01 HA 4 L12533-01 6/6/2007 K-40 2.05E+03 3.50E+02 6.20E+02 HA 4 L12533-01 6/6/2007 La-140 -3.OOE+01 1.70E+01 1.1OE+02 HA 4 L12533-01 6/6/2007 Mn-54 3.OOE+00 1.30E+01 5. 1OE+0 1 HA 4 L12533-01 6/6/2007 Nb-95 -1.10E+01 1.40E+01 5.90E+01 HA 4 L12533-01 6/6/2007 Ru-103 3.OOE+00 1.1 OE+01 4.20E+01 HA 4 L12533-01 6/6/2007 Ru-106 0.OOE+00 8.90E+01 3.60E+02 HA 4 L12533-01 6/6/2007 Sb-124 0.OOE+00 2.OOE+01 1.00E+02 HA 4 L12533-01 6/6/2007 Sb-125 1.20E+01 2.60E+01 9.70E+01 HA 4 L12533-01 6/6/2007 Se-75 7.90E+00 9.40E+00 3.40E+01 HA 4 L12533-01 6/6/2007 Zn-65 3.40E+01 2.1OE+01 6.20E+01 HA 4 L12533-01 6/6/2007 Zr-95 -4.OOE+01 2.70E+01 1.20E+02 HA 4 L13302-01 11/26/2007 AcTh-228 3.1 OE+0 1 4.90E+01 1.90E+02 HA 4 L13302-01 11/26/2007 Ag-108m -6.OOE+00 1.00E+01 4.30E+01 HA 4 L13302-01 11/26/2007 Ag-ll0m 0.OOE+00 2.1OE+01 8.40E+01 HA 4 L13302-01 11/26/2007 Ba-140 1.1OE+01 2.10E+01 9.OOE+01 HA 4 L13302-01 11/26/2007 Be-7 A-1.00E+01 1.30E+02 5.1OE+02 HA 4 L13302-01 11/26/2007 Ce- 141 7.OOE+00 2.30E+01 8.30E+01 HA 4 L13302-01 11/26/2007 Ce- 144 3.70E+01 9.OOE+01 3.20E+02 HA 4 L13302-01 11/26/2007 Co-57 -8.OOE+00 1.1 OE+0 1 4.1OE+0I HA 4 L13302-01 11/26/2007 Co-58 0.OOE+00 1.40E+01 5.70E+0 1 HA 4 L13302-01 11/26/2007 Co-60 5.70E+00 9.90E+00 4.20E+01 HA 4 L13302-01 11/26/2007 Cr-51 -1.80E+02 1.60E+02 6.30E+02 HA 4 L13302-01 11/26/2007 Cs-134 -3.1OE+01 1.80E+01 8.50E+01 HA 4 L13302-01 11/26/2007 Cs-137 -3.50E+01 1.80E+01 8.10E+01 HA 4 L13302-01 11/26/2007 Fe-59 1.50E+01 3.40E+01 1.30E+02 HA 4 L13302-01 11/26/2007 1-131 -1.20E+01 3.20E+01 1.30E+02

¢ HA 4 L13302-01 11/26/2007 K-40 1.74E+03 3.50E+02 6.40E+02 HA 4 L13302-01 11/26/2007 La-140 1.1OE+0 1 2.1OE+01 9.OOE+01 HA 4 L13302-01 11/26/2007 Mn-54 -1.20E+01 1.40E+01 6.20E+01 HA 4 L13302-01 11/26/2007 Nb-95 0.OOE+00 1.50E+01 6.OOE+01 HA 4 L13302-01 11/26/2007 Ru-103 8.OOE+00 1.60E+01 5.90E+01 HA 4 L13302-01 11/26/2007 Ru-106 -7.OOE+01 1.1OE+02 4.80E+02 HA 4 L13302-01 11/26/2007 Sb-124 -2.OOE+01 3.70E+01 1.80E+02 HA 4 L13302-01 11/26/2007 Sb-125 -4.OOE+00 4.OOE+01 1.60E+02 HA 4 L13302-01 11/26/2007 Se-75 1.20E+01 1.60E+01 5.60E+01 HA 4 L13302-01 11/26/2007 Zn-65 -8.50E+01 4.30E+01 2.OOE+02 HA 4 L13302-01 11/26/2007 Zr-95 -8.OOE+00 2.50E+01 1.1OE+02 HA 54 L12533-02 6/2/2007 AcTh-228 -8.OOE+00 4.40E+01 1.80E+02 HA 54 L1,2533-02 6/2/2007 Ag-108m -1.54E+01 9.OOE+00 4.1OE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-128-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

HA 54 L12533-02 6/2/2007 Ag-il0m 5.OOE+00 1.70E+01 6.90E+01 HA 54 L12533-02 6/2/2007 Ba-140 0.OOE+00 3.20E+01 1.40E+02 HA 54 L12533-02 6/2/2007 Be-7 -7.30E+01 7.30E+01 3.40E+02 HA 54 L12533-02 6/2/2007 Ce-141 -6.OOE+00 2.OOE+01 7.30E+01 HA 54 L12533-02 6/2/2007 Ce-144 6.OOE+01 6.1OE+01 2.1OE+02 HA 54 L12533-02 6/2/2007 Co-57 -1.40E+00 8.OOE+00 2.90E+01 HA 54 L12533-02 6/2/2007 Co-58 1.30E+01 1.00E+01 3.40E+01 HA 54 L12533-02 6/2/2007 Co-60 -9.OOE+00 1.90E+01 8.OOE+01 HA 54 L12533-02 6/2/2007 Cr-51 6.OOE+01 1.30E+02 4.70E+02 HA 54 L12533-02 6/2/2007 Cs-134 6.OOE+00 1.20E+01 4.80E+01 HA 54 L12533-02 6/2/2007 Cs-137 3.OOE+00 1.40E+01 5.50E+01 HA 54 L12533-02 6/2/2007 Fe-59 5.80E+01 2.70E+01 7.10E+01 HA 54 L12533-02 6/2/2007 1-131 -3.20E+01 2.70E+01 1.20E+02 HA 54 L12533-02 6/2/2007 K-40 1.91E+03 3.60E+02 6.80E+02 HA 54 L12533-02 6/2/2007 La- 140 0.OOE+00 3.70E+01 1.60E+02 HA 54 L12533-02 6/2/2007 Mn-54 -1.00E+00 1.1OE+01 4.70E+01 HA 54 L12533-02 6/2/2007 Nb-95 1.1OE+01 1.30E+01 4.70E+0 I HA 54 L12533-02 6/2/2007 Ru-103 -6.OOE+00 1.30E+01 5.50E+01 HA 54 L12533-02 6/2/2007 Ru-106 6.OOE+0 1 1.50E+02 5.70E+02 HA 54 L12533-02 6/2/2007 Sb-124 -1.50E+01 1.50E+01 1.10E+02 HA 54 L12533-02 6/2/2007 Sb-125 4.OOE+01 2.50E+01 8.10E+01 HA 54 L12533-02 6/2/2007 Se-75 1.60E+01 1.1OE+01 3.70E+01 HA 54 L12533-02 6/2/2007 Zn-65 -3.70E+01 3.20E+0 1 1.50E+02 HA 54 L12533-02 6/2/2007 Zr-95 1.00E+01 1.90E+01 7.40E+01 HA 54 L13302-02 11/21/2007 AcTh-228 1.20E+01 5.60E+01 2.20E+02 HA 54 L13302-02 11/21/2007 Ag-108m -3.OOE+00 1.40E+01 5.50E+01 HA 54 L13302-02 11/21/2007 Ag-ll0m -6.OOE+00 2.20E+01 8.90E+01 HA 54 L13302-02 11/21/2007 Ba-140 5.60E+01 3.60E+01 1.1 OE+02 HA 54 L13302-02 11/21/2007 Be-7 -3.OOE+01 1.20E+02 4.80E+02 HA 54 L13302-02 11/21/2007 Ce-141 3.OOE+00 1.80E+01 6.70E+01 HA 54 L13302-02 11/21/2007 Ce-144 5.70E+01 7.OOE+01 2.40E+02 HA 54 L13302-02 11/21/2007 Co-57 6.OOE+00 1.00E+01 3.60E+01 HA 54 L13302-02 11/21/2007 Co-58 -4.OOE+00 1.70E+01 6.80E+01 54 L13302-02 11/21/2007 Co-60 0.00E+00 1.50E+01 6.40E+01 HA HA 54 L13302-02 11/21/2007 Cr-51 -2.70E+02 1.50E+02 6.50E+02 HA 54 L13302-02 11/21/2007 Cs-134 -3.80E+01 1.60E+01 7.90E+01 HA 54 L13302-02 11/21/2007 Cs-137 8.OOE+00 1.80E+01 6.60E+01 HA 54 L13302-02 11/21/2007 Fe-59 1.00E+00 4.20E+01 1.70E+02 HA 54 L13302-02 11/21/2007 1-131 -7.50E+01 4.60E+01 2.OOE+02 HA 54 L13302-02 11/21/2007 K-40 3.06E+03 4.60E+02 8.40E+02 HA 54 L13302-02 11/21/2007 La-140 5.60E+01 3.60E+01 1.1OE+02 HA 54 L13302-02 11/21/2007 Mn-54 8.OOE+00 1.30E+01 5.10E+01 HA 54 L13302-02 11/21/2007 Nb-95 -5.OOE+00 1.70E+01 7.10E+01 HA 54 L13302-02 11/21/2007 Ru-103 -2.90E+01 1.20E+01 6.20E+01 HA 54 L13302-02 11/21/2007 Ru-106 6.OOE+01 1.1OE+02 4.1OE+02 HA 54 L13302-02 11/21/2007 Sb- 124 3.1 OE+0 1 2.20E+01 4.20E+01 HA 54 L13302-02 11/21/2007 Sb-125 1.10E+01 4.1OE+01 1.50E+02 HA 54 L13302-02 11/21/2007 Se-75 6.OOE+00 1.40E+01 5.20E+01 HA 54 L13302-02 11/21/2007 Zn-65 -6.50E+01 5.OOE+01 2. 1OE+02 HA 54 L13302-02 11/21/2007 Zr-95 7.OOE+00 2.50E+01 9.70E+0 I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-129-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

MS 6 L12453-04 5/22/2007 Sr-90 1.00E+0l 7.40E+01 2.50E+02 MS 6 L13304-04 11/26/2007 Sr-90 -6.OOE+01 6.50E+01 2.20E+02 MS 56 L12453-05 5/22/2007 Sr-90 2.80E+01 6.70E+0 1 2.30E+02 MS 56 L13304-05 11/26/2007 Sr-90 -6.10E+01 6.60E+01 2.30E+02 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation) +

Minimum Detectable Concentration > Lower Limit of Detection Requirement

-130-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

MU L12453-01 5/22/2007 AcTh-228 -8.OOE+00 4.OOE+01 1.60E+02 MU L12453-01 5/22/2007 Ag-108m 6.10E+00 7.70E+00 2.80E+01 MU L12453-01 5/22/2007 Ag-Il0mn 1.00E+01 1.40E+01 5.OOE+01 MU L12453-01 5/22/2007 Ba-140 1.00E+01 2.50E+01 1.00E+02 MU L12453-01 5/22/2007 Be-7 -7.30E+01 9.60E+01 3.90E+02 MU L12453-01 5/22/2007 Ce-141 -4.70E+0 1 1.80E+01 7.60E+01 MU L12453-01 5/22/2007 Ce- 144 4.70E+0 1 4.90E+01 1.70E+02 MU L12453-01 5/22/2007 Co-57 -1.46E+01 6.20E+00 2.60E+01 MU L12453-01 5/22/2007 Co-58 -1.60E+01 1.1 OE+0I 5.OOE+01 MU L12453-01 5/22/2007 Co-60 3.1OE+00 8.30E+00 3.40E+0 I MU L12453-01 5/22/2007 Cr-51 9.OOE+01 1.30E+02 4.50E+02 MU L12453-01 5/22/2007 Cs-134 -4.OOE+00 1.00E+01 4.30E+01 MU L12453-01 5/22/2007 Cs-137 -1.75E+01 9.30E+00 4.30E+01 MU L12453-01 5/22/2007 Fe-59 -1.50E+01 3.OOE+01 1.20E+02 MU L12453-01 5/22/2007 1-131 2.50E+01 4.OOE+01 1.50E+02 MU L12453-01 5/22/2007 K-40 1.46E+03 2.60E+02 5.40E+02 MU L12453-01 5/22/2007 La-140 1.1 OE+0 1 2.90E+01 1.20E+02 MU L12453-01 5/22/2007 Mn-54 1.20E+01 1.00E+01 3.50E+01 MU L12453-01 5/22/2007 Nb-95 1.90E+01 1.70E+0 I 5.80E+01 MU L12453-01 5/22/2007 Ru-103 -3.OOE+00 1.40E+01 5.40E+01 MU L12453-01 5/22/2007 Ru-106 -3.OOE+01 1.20E+02 4.40E+02 MU L12453-01 5/22/2007 Sb-124 0.OOE+00 1.90E+01 8.80E+01 MU L12453-01 5/22/2007 Sb-125 3.30E+01 2.50E+01 8.50E+01 MU L12453-01 5/22/2007 Se-75 -2.OOE+00 1.20E+01 4.50E+01 MU L12453-01 5/22/2007 Zn-65 -3.50E+01 2.20E+01 1.00E+02 MU L12453-01 5/22/2007 Zr-95 -1.40E+01 1.90E+01 8.OOE+01 MU L13304-01 11/26/2007 AcTh-228 3.50E+01 7.20E+01 2.80E+02 MU L13304-01 11/26/2007 Ag-108m 8.OOE+00 1.1 OE+01 4. 1OE+01 MU L13304-01 11/26/2007 Ag-ll0m 1.90E+01 1.80E+01 6.30E+01 MU L13304-01 11/26/2007 Ba-140 -3.90E+0 1 3.90E+01 2. 1OE+02 MU L13304-01 11/26/2007 Be-7 -4.OOE+01 1.20E+02 5.30E+02 MU L13304-01 11/26/2007 Ce-141 8.OOE+00 2.20E+01 7.90E+01 MU L13304-01 11/26/2007 Ce-144 2.30E+01 6.20E+01 2.30E+02 MU L13304-01 11/26/2007 Co-57 5.1OE+00 8.10E+00 2.90E+01 MU L13304-01 11/26/2007 Co-58 -3.OOE+00 1.80E+01 7.70E+01 MU L13304-01 11/26/2007 Co-60 8.OOE+00 1.70E+01 7.30E+0 1 MU L13304-01 11/26/2007 Cr-51 1.70E+02 1.30E+02 4.30E+02 MU L13304-01 11/26/2007 Cs-134 -3.20E+01 1.60E+01 9.10E+01 MU L13304-01 11/26/2007 Cs-137 6.OOE+00 1.50E+01 6.30E+01 MU L13304-01 11/26/2007 Fe-59 -1.60E+01 1.60E+01 1.20E+02 MU L13304-01 11/26/2007 1-131 -3.10E+01 2.50E+01 1.20E+02 MU L13304-01 11/26/2007 K-40 4.40E+02 2.80E+02 8.90E+02 MU L13304-01 11/26/2007 La-140 -3.90E+0 1 3.90E+01 2.1OE+02 MU L13304-01 11/26/2007 Mn-54 1.00E+01 1.60E+01 6.30E+01 MU L13304-01 11/26/2007 Nb-95 -9.OOE+00 1.30E+01 6.90E+01 MU L13304-01 11/26/2007 Ru-103 4.60E+0 1 1.50E+01 1.40E+01 MU L13304-01 11/26/2007 Ru-106 -5.OOE+01 1.50E+02 6.40E+02 MU L13304-01 11/26/2007 Sb-124 0.OOE+00 5.30E+01 2.40E+02 MU L13304-01 11/26/2007 Sb-125 -5.80E+01 3.80E+01 1.80E+02 MU L13304-01 11/26/2007 Se-75 -7.OOE+00 1.30E+01 5.60E+01 MU L13304-01 11/26/2007 Zn-65 0.OOE+00 3.20E+01 1.50E+02 MU L13304-01 11/26/2007 Zr-95 3.OOE+01 3.1 OE+0 1 1.1OE+02 MU L12454-01 5/23/2007 AcTh-228 0.OOE+00 4.20E+01 1.90E+02 MU L12454-01 5/23/2007 Ag-108m 8.50E+00 9.40E+00 3.40E+0 1

Radioactivity detected in sample (i.e., concentration > 3X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-131-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

MU L12454-01 5/23/2007 Ag-li0m -3.50E+01 2.OOE+01 1.00E+02 MU L12454-01 5/23/2007 Ba-140 8.40E+01 4.20E+01 5.70E+01 MU L12454-01 5/23/2007 Be-7 -1.00E+02 1.30E+02 5.70E+02 MU L12454-01 5/23/2007 Ce-141 -3.1 OE+0 1 2.OOE+01 8.50E+01 MU L12454-01 5/23/2007 Ce- 144 -3.10E+01 5.10E+01 2.1OE+02 MU L12454-01 5/23/2007 Co-57 -9.OOE-01 7. 1OE+00 2.70E+01 MU L12454-01 5/23/2007 Co-58 -2.1OE+01 1.60E+01 7.80E+01 MU L12454-01 5/23/2007 Co-60 -1.OOE+01 1.70E+01 8.1OE+01 MU L12454-01 5/23/2007 Cr-51 3.OOE+01 1.30E+02 5.20E+02 MU L12454-01 5/23/2007 Cs-134 -1.40E+01 1.40E+01 6.90E+01 MU L12454-01 5/23/2007 Cs-137 0.OOE+00 1.40E+01 5.70E+0 I MU L12454-01 5/23/2007 Fe-59 1.40E+01 2.40E+01 1.00E+02 MU L12454-01 5/23/2007 1-131 -1.60E+01 5.60E+01 2.30E+02 MU L12454-01 5/23/2007 K-40 9.50E+02 6.20E+02 2.OOE+03 MU L12454-01 5/23/2007 La-140 9.70E+01 4.80E+01 6.60E+01 MU L12454-01 5/23/2007 Mn-54 9.50E+00 6.70E+00 1.30E+01 MU L12454-01 5/23/2007 Nb-95 -2.50E+01 2.1OE+01 9.60E+01 MU L12454-01 5/23/2007 Ru-103 0.OOE+00 1.1 OE+0 1 4.90E+01 MU L12454-01 5/23/2007 Ru-106 -4.OOE+01 1.20E+02 5.20E+02 MU L12454-01 5/23/2007 Sb-124 -2.20E+01 2.20E+01 1.60E+02 MU L12454-01 5/23/2007 Sb-125 9.OOE+00 3.10E+01 1.20E+02 MU L12454-01 5/23/2007 Se-75 1.80E+01 1.40E+01 4.80E+01 MU L12454-01 5/23/2007 Zn-65 -3.70E+01 3.70E+01 1.70E+02 MU L12454-01 5/23/2007 Zr-95 2.30E+01 3.OOE+01 1.1 OE+02 MU L13306-01 11/20/2007 AcTh-228 -6.50E+01 5. I OE+01 2.20E+02 MU L13306-01 11/20/2007 Ag-108m -1.1OE+01 1.20E+01 4.80E+01 MU L13306-01 11/20/2007 Ag- l10m 1.50E+01 1.80E+01 6.40E+01 MU L13306-01 11/20/2007 Ba-140 0.OOE+00 2.60E+01 1.20E+02 MU L13306-01 11/20/2007 Be-7 3.OOE+01 1.20E+02 4.60E+02 MU L13306-01 11/20/2007 Ce-141 1.20E+01 2.20E+01 7.80E+01 MU L13306-01 11/20/2007 Ce-144 -6.70E+0 1 6.50E+01 2.60E+02 MU L13306-01 11/20/2007 Co-57 2.80E+00 8.1OE+00 3.OOE+01 MU L13306-01 11/20/2007 Co-58 -1.50E+01 1.60EtOl 6.80E+01 MU L13306-01 11/20/2007 Co-60 -1.40E+01 1.40E+01 6.50E+01 MU L13306-01 11/20/2007 Cr-51 -7.OOE+01 1.30E+02 5.10E+02 MU L13306-01 11/20/2007 Cs-134 1.50E+01 1.40E+-01 4.90E+01 MU L13306-01 11/20/2007 Cs-137 2.OOE+00 1.1 OE+01 4.20E+01 MU L13306-01 11/20/2007 Fe-59 0.OOE+00 4.OOE+01 1.50E+02 MU L13306-01 11/20/2007 1-131 1.70E+01 5.20E+01 1.90E+02 MU L13306-01 11/20/2007 K-40 1.24E+03 3.OOE+02 7.OOE+02

MU L13306-01 11/20/2007 La-140 0.OOE+00 2.60E+01 1.20E+02 MU L13306-01 11/20/2007 Mn-54 3.OOE+00 1.50E+01 5.60E+01 MU L13306-01 11/20/2007 Nb-95 2.40E+0 1 1.90E+01 6.60E+01 MU L13306-01 11/20/2007 Ru-103 -2.70E+01 1.60E+01 7.20E+01 MU L13306-01 11/20/2007 Ru-106 2.OOE+01 1.20E+02 4.60E+02 MU L13306-01 11/20/2007 Sb-124 -2.70E+01 2.70E+01 1.40E+02 MU L13306-01 11/20/2007 Sb-125 -6.90E+01 3.40E+01 1.501E+02 MU L13306-01 11/20/2007 Se-75 5.OOE+00 1.70E+01 6.20E+01 MU L13306-01 11/20/2007 Zn-65 -4.20E+01 3.1 OE+0 1 1.40E+02 MU L13306-01 11/20/2007 Zr-95 -2.OOE+01 2.50E+01 1.10E+02 MU L12453-02 5/22/2007 AcTh-228 -2.1OE+01 3.80E+01 1.50E+02 MU L12453-02 5/22/2007 Ag-108m 2.40E+00 8.90E+00 3.20E+01 MU L12453-02 5/22/2007 Ag-Il0m -1.00E+01 1.40E+01 5.90E+01 MU L12453-02 5/22/2007 Ba-140 -2.20E+01 2.OOE+01 1.1OE+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-132-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

MU L12453-02 5/22/2007 Be-7 1.87E+02 9.70E+0I 3.I0E+02 MU L12453-02 5/22/2007 Ce-141 -2.1OE+0I 1.80E+01 6.80E+01 MU L12453-02 5/22/2007 Ce-144 -2.60E+01 4.90E+01 1.90E+02 MU L12453-02 5/22/2007 Co-57 -1.25E+01 7.1OE+00 2.80E+01 MU L12453-02 5/22/2007 Co-58 7.70E+00 8.50E+00 3.10E+01 MU L12453-02 5/22/2007 Co-60 -1.22E+01 9.60E+00 4.60E+01 MU L12453-02 5/22/2007 Cr-51 -6.OOE+01 1.40E+02 5.20E+02 MU L12453-02 5/22/2007 Cs-134 2.50E+00 8.1OE+00 3.20E+01 MU L12453-02 5/22/2007 Cs-137 -2.OOE+00 1.1OE+0I 4.30E+0I MU L12453-02 5/22/2007 Fe-59 -1.20E+01 2.40E+01 1.00E+02 MU L12453-02 5/22/2007 1-131 5.1OE+0I 5.50E+01 1.90E+02 MU L12453-02 5/22/2007 K-40 1.83E+03 2.70E+02 5.1OE+02 MU L12453-02 5/22/2007 La-140 -2.50E+01 2.30E+0I 1.20E+02 MU L12453-02 5/22/2007 Mn-54 9.OOE+00 1.20E+01 4.20E+01 MU L12453-02 5/22/2007 Nb-95 7.OOE+00 1.30E+01 4.70E+01 MU L12453-02 5/22/2007 Ru- 103 6.OOE+00 1.20E+01 4.30E+01 MU L12453-02 5/22/2007 Ru-106 2.OOE+01 1.1 OE+02 4.1OE+02 MU L12453-02 5/22/2007 Sb-124 6.OOE+00 2.60E+0I 1.1OE+02 MU L12453-02 5/22/2007 Sb-125 -6.OOE+00 2.60E+0I 1.00E+02 MU L12453-02 5/22/2007 Se-75 5.OOE+00 1.1 OE+0 1 3.80E+01 MU L12453-02 5/22/2007 Zn-65 -6.OOE+01 2.90E+01 1.30E+02 MU L12453-02 5/22/2007 Zr-95 -1.30E+01 1.90E+01 8. I OE+01 MU L13304-02 11/26/2007 AcTh-228 -4.20E+01 6.20E+01 3.OOE+02 MU L13304-02 11/26/2007 Ag- 108m 1.60E+01 1.30E+01 4.30E+01 MU L13304-02 11/26/2007 Ag-110in -1.00E+01 2.1OE+0I 1.00E+02 MU L13304-02 11/26/2007 Ba-140 2.1OE+01 4.60E+01 1.90E+02 MU L13304-02 11/26/2007 Be-7 -8.60E+01 8.60E+01 4.60E+02 MU L13304-02 11/26/2007 Ce-141 1.00E+01 2.20E+01 8.1OE+01 MU L13304-02 11/26/2007 Ce-144 -1.57E+02 7.30E+01 3.30E+02 MU L13304-02 11/26/2007 Co-57 -1.90E+00 9.70E+00 3.80E+01 MU L13304-02 11/26/2007 Co-58 9.OOE+00 1.50E+01 6.OOE+01 MU L13304-02 11/26/2007 Co-60 7.OOE+00 2.30E+01 9.70E+01 MU L13304-02 11/26/2007 Cr-51 -1.50E+02 1.70E+02 7.1OE+02 MU L13304-02 11/26/2007 Cs-134 2.50E+01 2.1OE+0I 7.30E+01 MU L13304-02 11/26/2007 Cs-137 1.00E+01 L60E+01 6.20E+0 I MU L13304-02 11/26/2007 Fe-59 -6.80E+01 4.80E+01 2.40E+02 MU L13304-02 11/26/2007 1-131 1.80E+01 2.90E+01 1.1OE+02 MU L13304-02 11/26/2007 K-40 4.90E+02 3.50E+02 1.20E+03 MU L13304-02 11/26/2007 La-140 2.1OE+01 4.60E+01 1.90E+02 MU L13304-02 11/26/2007 Mn-54 4.OOE+00 2.OOE+01 8.OOE+01 MU L13304-02 11/26/2007 Nb-95 5.30E+01 2.40E+01 6.30E+01 MU L13304-02 11/26/2007 Ru- 103 0.OOE+00 1.50E+01 6.60E+0 1 MU L13304-02 11/26/2007 Ru-106 4.OOE+02 1.80E+02 5.20E+02 MU L13304-02 11/26/2007 Sb-124 0.OOE+00 0.OOE+00 7.40E+0 1 MU L13304-02 11/26/2007 Sb-125 -7.40E+01 3.OOE+01 1.70E+02 MU L13304-02 11/26/2007 Se-75 3.1OE+01 1.80E+01 5.70E+01 MU L13304-02 11/26/2007 Zn-65 0.OOE+00 3.40E+01 1.60E+02 MU L13304-02 11/26/2007 Zr-95 8.OOE+00 2.80E+01 1.20E+02 MU L12454-02 5/21/2007 AcTh-228 -8.OOE+00 4.90E+01 1.90E+02 MU L12454-02 5/21/2007 Ag-108m 0.OOE+00 5.90E+00 2.50E+01 MU L12454-02 5/21/2007 Ag-Il0m -1.40E+01 1.90E+01 8. I OE+0I MU L12454-02 5/21/2007 Ba-140 0.OOE+00 2.80E+01 1.30E+02 MU L12454-02 5/21/2007 Be-7 8.OOE+01 1.1OE+02 4.1OE+02 MU L12454-02 5/21/2007 Ce-141 1.00E+00 2.40E+01 8.90E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-133-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

MU L12454-02 5/21/2007 Ce-144 -3.80E+01 6.20E+01 2.40E+02 MU L12454-02 5/21/2007 Co-57 -2.40E+00 8.80E+00 3.30E+01 MU L12454-02 5/21/2007 Co-58 7.OOE+00 1.50E+01 5.50E+01 MU L12454-02 5/21/2007 Co-60 -1.70E+01 1.20E+01 6.1OE+01 MU L12454-02 5/21/2007 Cr-51 1.30E+02 1.50E+02 5.30E+02 MU L12454-02 5/21/2007 Cs-134 2.OOE+00 1.50E+01 5.90E+01 MU L12454-02 5/21/2007 Cs-137 6.OOE+00 1.20E+01 4.60E+01 MU L12454-02 5/21/2007 Fe-59 1.00E+00 3.80E+01 1.50E+02 MU L12454-02 5/21/2007 1-131 -2.60E+01 6.OOE+01 2.40E+02 MU L12454-02 5/21/2007 K-40 1.31 E+03 3.20E+02 8.1 OE+02

MU L12454-02 5/21/2007 La-140 0.OOE+00 3.30E+01 1.50E+02 MU L12454-02 5/21/2007 Mn-54 -6.OOE+00 1.1 OE+01 4.80E+01 MU L12454-02 5/21/2007 Nb-95 -2.OOE+00 1.70E+01 6.90E+01 MU L12454-02 5/21/2007 Ru-103 7.OOE+00 1.30E+01 4.90E+01 MU L12454-02 5/21/2007 Ru-106 7.OOE+01 1.30E+02 4.80E+02 MUI L12454-02 5/21/2007 Sb-124 -6.70E+01 3.50E+01 1.90E+02 MU L12454-02 5/21/2007 Sb-125 -1.90E+01 2.50E+01 1.1OE+02 MU L12454-02 5/21/2007 Se-75 1.00E+01 1.40E+01 4.90E+01 MU L12454-02 5/21/2007 Zn-65 -3.80E+01 2.70E+01 1.30E+02 MU L12454-02 5/21/2007 Zr-95 0.OOE+00 2.20E+01 9.1OE+01 MU L13306-02 11/19/2007 AcTh-228 -7.OOE+00 5.20E+01 2.1OE+02 MU L13306-02 11/19/2007 Ag-108m 1.29E+01 9.90E+00 3.30E+01 MU L13306-02 11/19/2007 Ag-lr0m -5.OOE+00 1.70E+01 7.10E+01 MU L13306-02 11/19/2007 Ba-140 1.1OE+01 3.1OE+01 1.30E+02 MU L13306-02 11/19/2007 Be-7 1.00E+01 1.30E+02 4.80E+02 MU L13306-02 11/19/2007 Ce-141 1.20E+01 2.1OE+01 7.40E+01 MU L13306-02 11/19/2007 Ce-144 1.00E+01 7.30E+01 2.60E+02 MU 59 L13306-02 11/19/2007 Co-57 9.80E+00 8.70E+I00 2.90E+01 MU 59 L13306-02 11/19/2007 Co-58 -7.OOE+00 1.20E+I01 5.20E+01 MU 59 L13306-02 11/19/2007 Co-60 -4.OOE+00 1.20E+401 5.40E+01 MU 59 L13306-02 11/19/2007 Cr-51 1.20E+02 1.40E+I02 5.OOE+02 MU 59 L13306-02 11/19/2007 Cs-134 1.80E+01 1.40E+I01 4.60E+01 MU 59 L13306-02 11/19/2007 Cs-137 -3.10E+01 1.30E+I01 6.20E+01 MU 59 L13306-02 11/19/2007 Fe-59 3.OOE+00 3.1OE+I01 1.30E+02 MU 59 L13306-02 11/19/2007 1-131 -1.70E+01 5.80E+I01 2.20E+02 MU 59 L13306-02 11/19/2007 K-40 1.13E+03 2.70E+I02 5.90E+02 MU 59 L13306-02 11/19/2007 La-140 1.1OE+01 3.1OE+I01 1.30E+02 MU 59 L13306-02 11/19/2007 Mn-54 -1.OOE+01 1.30E+I01 5.40E+01 MU 59 L13306-02 11/19/2007 Nb-95 -8.OOE+00 1.50E+401 6.60E+01 MU 59 L13306-02 .11/19/2007 Ru-103 -5.OOE+00 1.30E+I01 5.40E+01 MU 59 L13306-02 11/19/2007 Ru-106 -1.60E+02 1.20E+(02 5.40E+02 MU 59 L13306-02 11/19/2007 Sb-124 3.80E+01 3.OOE+I01 1.00E+02 MU 59 L13306-02 11/19/2007 Sb-125 -2.20E+01 2.70E+101 1.20E+02 MU 59 L13306-02 11/19/2007 Se-75 -8.OOE+00 1.50E+(01 5.90E+01 MU 59 L13306-02 11/19/2007 Zn-65 -2.30E+01 3.OOE+(01 1.30E+02 MU 59 L13306-02 11/19/2007 Zr-95 -1.90E+01 1.90E+!01 9.OOE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-134-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-01 5/22/2007 AcTh-228 1.95E+03 1.20E+02 3.70E+02 SE L12457-01 5/22/2007 Ag-108m -1.60E+01 1.90E+01 7.20E+01 SE L12457-01 5/22/2007 Ag-ll0m 4.70E+01 2.80E+01 9.OOE+01 SE L12457-01 5/22/2007 Ba-140 6.30E+02 2.50E+02 7.90E+02 SE L12457-01 5/22/2007 Be-7 1.80E+02 2.20E+02 7.50E+02 SE L12457-01 5/22/2007 Ce-141 -1.30E+01 5.50E+01 1.90E+02 SE L12457-01 5/22/2007 Ce-144 2.OOE+01 1.30E+02 4.60E+02 SE L12457-01 5/22/2007 Co-57 -3.OOE+00 1.70E+01 5.80E+01 SE L12457-01 5/22/2007 Co-58 -4.OOE+00 2.50E+01 9.40E+01 SE L12457-01 5/22/2007 Co-60 -3.80E+01 2.70E+01 1.1OE+02 SE L12457-01 5/22/2007 Cr-51 -4.60E+02 2.90E+02 1.1OE+03 SE L12457-01 5/22/2007 Cs-134 -5.OOE+00 2.OOE+01 7.50E+01 SE L12457-01 5/22/2007 Cs-137 1.80E+01 2.30E+01 7.90E+01 SE L12457-01 5/22/2007 Fe-59 3.90E+01 6.50E+01 2.30E+02 SE L12457-01 5/22/2007 1-131 -1.40E+02 1.30E+02 4.90E+02 SE L12457-01 5/22/2007 K-40 1.22E+04 8.OOE+02 i.1OE+03 SE L12457-01 5/22/2007 La- 140 1.00E+01 1.40E+02 5.10E+02 SE L12457-01 5/22/2007 Mn-54 5.60E+01 2.50E+01 7.70E+01 SE L12457-01 5/22/2007 Nb-95 -5.70E+01 4.20E+01 1.60E+02 SE L12457-01 5/22/2007 Ru-103 3.70E+01 3.OOE+01 1.00E+02 SE L12457-01 5/22/2007 Ru-106 5.OOE+01 2.20E+02 7.70E+02 SE L12457-01 5/22/2007 Sb-124 4.40E+01 5.70E+OI 2.1OE+02 SE L12457-01 5/22/2007 Sb-125 6.20E+01 5.90E+01 2.OOE+02 SE L12457-01 5/22/2007 Se-75 2.50E+01 3.OOE+01 1.00E+02 SE L12457-01 5/22/2007 Zn-65 4.OOE+01 1.1OE+02 3.60E+02 SE L12457-01 5/22/2007 Zr-95 7.20E+01 5.50E+01 1.80E+02 SE L12457-02 5/22/2007 AcTh-228 -3.40E+01 5.40E+01 2.30E+02 SE L12457-02 5/22/2007 Ag-108m -5.OOE+00 1.1OE+0I 4.50E+01 SE L12457-02 5/22/2007 Ag-il0m 0.OOE+00 2.OOE+01 8.OOE+01 SE L12457-02 5/22/2007 Ba-140 1.40E+02 1.l0E+02 3.70E+02 SE L12457-02 5/22/2007 Be-7 -3.OOE+01 1.20E+02 4.80E+02 SE L12457-02 5/22/2007 Ce-141 2.1OE+01 4.70E+0 I 1.60E+02 SE L12457-02 5/22/2007 Ce-144 8.OOE+01 1.30E+02 4.30E+02 SE L12457-02 5/22/2007 Co-57 -1.50E+01 1.70E+01 5.90E+01 SE L12457-02 5/22/2007 Co-58 -8.OOE+00 1.40E+01 6.30E+01 SE L12457-02 5/22/2007 Co-60 2.50E+01 1.60E+01 5.20E+01 SE L12457-02 5/22/2007 Cr-51 2.OOE+01 1.90E+02 7. 1OE+02 SE L12457-02 5/22/2007 Cs-134 0.OOE+00 9.OOE+00 3.70E+01 SE L12457-02 5/22/2007 Cs-137 3.OOE+00 1.20E+01 4.80E+01 SE L12457-02 5/22/2007 Fe-59 4.50E+01 3.20E+01 1.00E+02 SE L12457-02 5/22/2007 1-131 -1.20E+02 6.30E+OI 3.OOE+02 SE L12457-02 5/22/2007 K-40 9.OOE+01 1.30E+02 5.OOE+02 SE L12457-02 5/22/2007 La-140 9.60E+01 7.40E+01 2.50E+02 SE L12457-02 5/22/2007 Mn-54 -5.60E+00 9.20E+00 4.40E+01 SE L12457-02 5/22/2007 Nb-95 0.OOE+00 2.OOE+01 8.1OE+01 SE L12457-02 5/22/2007 Ru-103 0.OOE+00 2.OOE+01 7.60E+01 SE L12457-02 5/22/2007 Ru-106 -1.20E+02 1.1OE+02 4.90E+02 SE L12457-02 5/22/2007 Sb-124 -1.70E+01 3.80E+01 1.80E+02 SE L12457-02 5/22/2007 Sb-125 -4.20E+01 3.OOE+01 1.30E+02 SE L12457-02 5/22/2007 Se-75 5.50E+01 2.1OE+OI 6.50E+01 SE L12457-02 5/22/2007 Zn-65 -3.80E+01 2.70E+01 1.30E+02 SE L12457-02 5/22/2007 Zr-95 -1.20E+01 2.OOE+01 1.1OE+02 SE L12457-03 5/22/2007 AcTh-228 1.89E+03 5.40E+01 1.60E+02 SE L12457-03 5/22/2007 Ag-108m -2.80E+01 1.1OE+01 3.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-135-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-03 5/22/2007 Ag-il0m 1.OOE+00 1.40E+01 4.80E+01 SE L12457-03 5/22/2007 Ba-140 -2.20E+02 1.30E+02 4.70E+02 SE L12457-03 5/22/2007 Be-7 -6.OOE+01 1.30E+02 4.40E+02 SE L12457-03 5/22/2007 Ce-141 6.OOE+00 3.40E+0I 1.1OE+02 SE L12457-03 5/22/2007 Ce-144 0.OOE+00 1.90E+02 6.40E+02 SE L12457-03 5/22/2007 Co-57 1.70E+01 1.20E+01 4.OOE+01 SE L12457-03 5/22/2007 Co-58 6.OOE+00 1.30E+01 4.40E+01 SE L12457-03 5/22/2007 Co-60 3.OOE+00 1.1OE+0I 3.80E+01 SE L12457-03 5/22/2007 Cr-51 -6.OOE+01 1.90E+02 6.30E+02 SE L12457-03 5/22/2007 Cs-134 -4.80E+01 4.40E+01 1.50E+02 SE L12457-03 5/22/2007 Cs-137 -2.1OE+0I 1.30E+01 4.60E+01 SE L12457-03 5/22/2007 Fe-59 3.90E+0 I 4.30E+01 1.40E+02 SE L12457-03 5/22/2007 1-131 6.OOE+01 8.80E+01 2.90E+02 SE L12457-03 5/22/2007 K-40 1.28E+04 3.60E+02 3.60E+02 SE L12457-03 5/22/2007 La-140 6.60E+01 7.5OE+0I 2.50E+02 SE L12457-03 5/22/2007 Mn-54 2.40E+01 1.20E+01 3.80E+01 SE L12457-03 5/22/2007 Nb-95 1.50E+01 1.90E+01 6.5OE+01 SE L12457-03 5/22/2007 Ru-103 -1.70E+01 1.50E+01 5.30E+01 SE L12457-03 5/22/2007 Ru-106 -1.00E+01 1.1OE+02 3.70E+02 SE L12457-03 5/22/2007 Sb-124 -7.10E+01 2.20E+01 9.40E+01 SE L12457-03 5/22/2007 Sb-125 3.20E+01 3.50E+01 1.20E+02 SE L12457-03 5/22/2007 Se-75 0.OOE+00 1.70E+01 5.80E+01 SE L12457-03 5/22/2007 Zn-65 -9.OOE+00 5.20E+01 1.80E+02 SE L12457-03 5/22/2007 Zr-95 5.OOE+01 2.50E+01 8.1OE+0I SE L13301-01 11/26/2007 AcTh-228 2.28E+03 7.20E+01 2.OOE+02 SE L13301-01 11/26/2007 Ag-108m -5.OOE+00 1.40E+01 4.90E+01 SE L13301-01 11/26/2007 Ag-li0m 2.OOE+00 1.60E+01 5.40E+01 SE L13301-01 11/26/2007 Ba-140 8.OOE+01 1.1OE+02 3.60E+02 SE L13301-01 11/26/2007 Be-7 -9.OOE+01 1.40E+02 5.OOE+02 SE L13301-01 11/26/2007 Ce- 141 -3.30E+01 3.10E+01 1.1OE+02 SE L13301-01 11/26/2007 Ce-144 1.30E+02 1.1OE+02 3.70E+02 SE L13301-01 11/26/2007 Co-57 2.OOE+01 1.40E+01 4.50E+01 SE L13301-01 11/26/2007 Co-58 -1.40E+01 1.50E+01 5.50E+01 SE L13301-01 11/26/2007 Co-60 0.OOE+00 1.70E+01 5.90E+01 SE L13301-01 11/26/2007 Cr-51 2.OOE+01 1.70E+02 5.80E+02 SE L13301-01 11/26/2007 Cs-134 0.OOE+00 1.60E+01 5.40E+01 SE L13301-01 11/26/2007 Cs-137 8.OOE+00 1.80E+01 6.20E+01 SE L13301-01 11/26/2007 Fe-59 -2.20E+01 3.30E+01 1.20E+02 SE L13301-01 11/26/2007 1-131 -1.20E+01 5.20E+01 1.80E+02 SE L13301-01 11/26/2007 K-40 1.29E+04 4.80E+02 4.40E+02 SE L13301-01 11/26/2007 La-140 6.OOE+01 5.80E+01 1.90E+02 SE L13301-01 11/26/2007 Mn-54 1.60E+01 1.50E+01 5.OOE+01 SE L13301-01 11/26/2007 Nb-95 1.00E+01 3.OOE+01 1.00E+02 SE L13301-01 11/26/2007 Ru-103 4.OOE+01 1.70E+01 5.50E+01 SE L13301-01 11/26/2007 Ru-106 3.OOE+01 1.40E+02 4.90E+02 SE L13301-01 11/26/2007 Sb-124 -2.90E+01 3.1 OE+0 I 1.20E+02 SE L13301-01 11/26/2007 Sb-125 2.1 OE+0 1 4.40E+01 1.50E+02 SE L13301-01 11/26/2007 Se-75 -3.30E+01 1.90E+01 6.80E+01 SE L13301-01 11/26/2007 Zn-65 8.10E+01 7.60E+0 1 2.50E+02 SE L13301-01 11/26/2007 Zr-95 -1.90E+01 3.30E+01 1.20E+02 SE L13301-02 11/26/2007 AcTh-228 1.26E+03 9. 1OE+0I 3.30E+02 SE L13301-02 11/26/2007 Ag-108m 1.1OE+0I 2.OOE+01 6.90E+01 SE L13301-02 11/26/2007 Ag-ll0m -3.40E+01 1.90E+01 7.70E+01 SE L13301-02 11/26/2007 Ba-140 -7.OOE+01 1.50E+02 5.50E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-136-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L13301-02 11/26/2007 Be-7 -2.1 OE+02 2.OOE+02 7.50E+02 SE L13301-02 11/26/2007 Ce- 141 -2.OOE+00 4.30E+01 1.50E+02 SE L13301-02 11/26/2007 Ce- 144 1.30E+02 1.20E+02 4.OOE+02 SE L13301-02 11/26/2007 Co-57 2.20E+01 1.50E+01 5.1 OE+01 SE L13301-02 11/26/2007 Co-58 1.20E+01 2.00E+01 7.30E+01 SE L13301-02 11/26/2007 Co-60 -2.OOE+00 2.30E+01 8.70E+01 SE L13301-02 11/26/2007 Cr-51 -1.30E+02 2.OOE+02 7.20E+02 SE L13301-02 11/26/2007 Cs-134 -2.1 OE+01 1.90E+01 7.30E+01 SE L13301-02 11/26/2007 Cs-137 -3.60E+01 2. 1OE+01 8.40E+01 SE L13301-02 11/26/2007 Fe-59 -7.20E+01 5.OOE+01 2.OOE+02 SE L13301-02 11/26/2007 1-131 - 1.17E+02 6.OOE+01 2.30E+02 SE L13301-02 11/26/2007 K-40 1.35E+04 7.90E+02 8.10E+02 SE L13301-02 11/26/2007 La-140 1.48E+02 7.60E+01 2.40E+02 SE L13301-02 11/26/2007 Mn-54 7.OOE+00 2.30E+01 8.1OE+01 SE L13301-02 11/26/2007 Nb-95 -3.90E+01 3.40E+01 1.30E+02 SE L13301-02 11/26/2007 Ru-i103 0.OOE+00 2.10E+01 7.80E+01 SE L13301-02 11/26/2007 Ru-106 -3.10E+02 1.80E+02 7.30E+02 SE L13301-02 11/26/2007 Sb-124 3.70E+01 3.30E+01 1.20E+02 SE L13301-02 11/26/2007 Sb-125 1.10E+01 5.60E+01 2.OOE+02 SE L13301-02 11/26/2007 Se-75 -1.90E+01 2.60E+01 9.40E+01 SE L13301-02 11/26/2007 Zn-65 -6.OOE+01 1.1 OE+02 4.OOE+02 SE L13301-02 11/26/2007 Zr-95 6.70E+01 4.20E+01 1.40E+02 SE L13301-03 11/26/2007 AcTh-228 1.35E+03 9.1OE+01 2.60E+02 SE L13301-03 11/26/2007 Ag-108m 2.30E+01 1.60E+01 5.40E+01 SE L13301-03 11/26/2007 Ag-il0in 0.OOE+00 1.70E+01 6.20E+01 SE L13301-03 11/26/2007 Ba-140 2.OOE+01 1.60E+02 5.50E+02 SE L13301-03 11/26/2007 Be-7 -7.OOE+01 1.80E+02 6.40E+02 SE L13301-03 11/26/2007 Ce-141 5.OOE+00 4.40E+0 I 1.50E+02 SE L13301-03 11/26/2007 Ce-144 -1.1OE+02 1.40E+02 4.90E+02 SE L13301-03 11/26/2007 Co-57 -1.70E+01 1.80E+01 6.30E+01 SE L13301-03 11/26/2007 Co-58 -2.90E+01 1.80E+01 7.30E+01 SE L13301-03 11/26/2007 Co-60 1.70E+01 1.60E+01 5.40E+01 SE L13301-03 11/26/2007 Cr-51 -3.30E+02 2.20E+02 8. 1OE+02 SE L13301-03 11/26/2007 Cs-134 3.OOE+00 1.90E+01 6.60E+01 SE L13301-03 11/26/2007 Cs-137 -2.10E+01 1.90E+01 7.30E+0 1 SE L13301-03 11/26/2007 Fe-59 3.30E+01 4.OOE+01 1.40E+02 SE L13301-03 11/26/2007 1-131 7.50E+01 7.OOE+01 2.40E+02 SE L13301-03 11/26/2007 K-40 1.25E+04 6.30E+02 7.30E+02 SE L13301-03 11/26/2007 La-140 5.30E+01 7.50E+01 2.60E+02 SE L13301-03 11/26/2007 Mn-54 0.OOE+00 1.80E+01 6.50E+01 SE L13301-03 11/26/2007 Nb-95 2.60E+01 3.OOE+01 1.00E+02 SE L13301-03 11/26/2007 Ru-103 2.60E+01 2.30E+01 7.60E+01 SE L13301-03 11/26/2007 Ru-106 -6.0OE+01 1.70E+02 6.30E+02 SE L13301-03 11/26/2007 Sb- 124 3.30E+01 3.50E+01 1.20E+02 SE L13301-03 11/26/2007 Sb-125 -1.80E+01 4.70E+0 1 1.70E+02 SE L13301-03 11/26/2007 Se-75 -2.20E+01 2.90E+01 1.00E+02 SE L13301-03 11/26/2007 Zn-65 8.OOE+01 8.20E+01 2.80E+02 SE L13301-03 11/26/2007 Zr-95 -3.60E+0 I 3.50E+01 1.50E+02 SE L12457-04 5/23/2007 AcTh-228 2.62E+02 9.60E+01 2.80E+02 SE L12457-04 5/23/2007 Ag-108m 1.20E+01 1.70E+01 5.80E+0 1 SE L12457-04 5/23/2007 Ag-ll0m 3.OOE+01 2.70E+01 9.30E+01 SE L12457-04 5/23/2007 Ba-140 3.60E+02 1.70E+02 5.1OE+02 SE L12457-04 5/23/2007 Be-7 -3.OOE+01 1.60E+02 6.1OE+02 SE L12457-04 5/23/2007 Ce-141 -4.50E+01 3.20E+01 1.20E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-137-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-04 5/23/2007 Ce-144 -5.10E+01 8.5OE+01 3.1OE+02 SE L12457-04 5/23/2007 Co-57 2.60E+01 1.1 OE+0 I 3.40E+01 SE L12457-04 5/23/2007 Co-58 1.80E+01 2.OOE+01 7.20E+01 SE L12457-04 5/23/2007 Co-60 -5.OOE+01 1.80E+01 9.50E+01 SE L12457-04 5/23/2007 Cr-51 1.90E+02 1.80E+02 6.30E+02 SE L12457-04 5/23/2007 Cs-134 0.OOE+00 2.30E+0I 8.20E+01 SE L12457-04 5/23/2007 Cs-137 1.1OE+01 1.80E+01 6.60E+01 SE L12457-04 5/23/2007 Fe-59 8.30E+0I 5.20E+01 1.70E+02 SE L12457-04 5/23/2007 1-131 -4.20E+01 9.1OE+01 3.60E+02 SE L12457-04 5/23/2007 K-40 1.65E+04 9.80E+02 8.1OE+02 SE L12457-04 5/23/2007 La- 140 9.OOE+01 1.20E+02 4.30E+02 SE L12457-04 5/23/2007 Mn-54 -2.40E+0 1 2.OOE+01 8.50E+01 SE L12457-04 5/23/2007 Nb-95 -2.80E+01 2.90E+01 1.20E+02 SE L12457-04 5/23/2007 Ru-103 -8.OOE+00 1.80E+01 7.5OE+0 1 SE L12457-04 5/23/2007 Ru-106 1.60E+02 1.60E+02 5.50E+02 SE L12457-04 5/23/2007 Sb-124 -1.80E+01 3.1OE+01 1.70E+02 SE L12457-04 5/23/2007 Sb-125 -3.70E+01 4.90E+01 1.90E+02 SE L12457-04 5/23/2007 Se-75 -7.OOE+00 2.OOE+01 7.40E+01 SE L12457-04 5/23/2007 Zn-65 -7.OOE+01 5.80E+01 2.40E+02 SE L12457-04 5/23/2007 Zr-95 -1.12E+02 3.40E+01 1.80E+02 SE L12457-05 5/23/2007 AcTh-228 3.20E+02 1.20E+02 3.70E+02 SE L12457-05 5/23/2007 Ag-108m 8.OOE+00 1.40E+01 5.OOE+01 SE L12457-05 5/23/2007 Ag-110m 2.40E+01 3.20E+01 1.1OE+02 SE L12457-05 5/23/2007 Ba-140 -1.60E+02 2. 1OE+02 8.30E+02 SE L12457-05 5/23/2007 Be-7 -3.30E+02 1.90E+02 7.90E+02 SE L12457-05 5/23/2007 Ce-141 -8.1OE÷01 3.60E+01 1.40E+02 SE L12457-05 5/23/2007 Ce-144 6.OOE+01 1.00E+02 3.60E+02 SE L12457-05 5/23/2007 Co-57 -4.OOE+00 1.30E+01 4.80E+01 SE L12457-05 5/23/2007 Co-58 -3.90E+01 2.1 OE+0 1 9.60E+01 SE L12457-05 5/23/2007 Co-60 0.OOE+00 2.50E+01 9.90E+01 SE L12457-05 5/23/2007 Cr-51 4.OOE+02 2.30E+02 7.40E+02 SE L12457-05 5/23/2007 Cs-134 3.90E+01 3.20E+01 1.00E+02 SE L12457-05 5/23/2007 Cs-137 -1.20E+01 2.OOE+01 8.10E+01 SE L12457-05 5/23/2007 Fe-59 6.20E+01 6.70E+0 1 2.30E+02 SE L12457-05 5/23/2007 1-131 4.OOE+01 1.30E+02 4.60E+02 SE L12457-05 5/23/2007 K-40 1.72E+04 1.00E+03 8.80E+02 SE L12457-05 5/23/2007 La-140 -6.OOE+01 1.1 OE+02 4.30E+02 SE L12457-05 5/23/2007 Mn-54 -9.OOE+00 2.OOE+01 8.OOE+01 SE L12457-05 5/23/2007 Nb-95 -3.OOE+01 2.60E+01 1.1OE+02 SE L12457-05 5/23/2007 Ru- 103 -4.OOE+00 2.60E+01 1.00E+02 SE L12457-05 5/23/2007 Ru-106 9.OOE+01 1.60E+02 5.90E+02 SE L12457-05 5/23/2007 Sb- 124 -1.80E+01 1.80E+01 1.40E+02 SE L12457-05 5/23/2007 Sb-125 -8.OOE+00 3.90E+01 1.50E+02 SE L12457-05 5/23/2007 Se-75 -5.80E+01 2.1OE+01 9.10E+01 SE L12457-05 5/23/2007 Zn-65 -6.30E+01 6.1OE+01 2.50E+02 SE L12457-05 5/23/2007 Zr-95 -1.00E+00 3.40E+01 1.50E+02 SE L12457-06 5/23/2007 AcTh-228 2.OOE+02 1.50E+02 4.90E+02 SE L12457-06 5/23/2007 Ag-108m 7.OOE+00 1.40E+01 4.80E+01 SE L12457-06 5/23/2007 Ag-110m -4.10E+01 2.1OE+0I 8.90E+0 1 SE L12457-06 5/23/2007 Ba-140 -3.OOE+01 1.40E+02 5.40E+02 SE L12457-06 5/23/2007 Be-7 2.OOE+01 1.50E+02 5.40E+02 SE L12457-06 5/23/2007 Ce-141 3.1 OE+0 1 3.40E+01 1.20E+02 SE L12457-06 5/23/2007 Ce-144 9.60E+01 9.30E+01 3.1OE+02 SE L12457-06 5/23/2007 Co-57 -8.OOE+00 1.1OE+0 1 4.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-138-I

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-06 5/23/2007 Co-58 -3.30E+01 1.90E+01 7.80E+01 SE L12457-06 5/23/2007 Co-60 -1.30E+01 1.80E+01 7.30E+01 SE L12457-06 5/23/2007 Cr-51 7.OOE+01 2.20E+02 7.60E+02 SE L12457-06 5/23/2007 Cs-134 1.90E+01 2.30E+01 7.50E+01 SE L12457-06 5/23/2007 Cs-137 1.00E+01 1.60E+01 5.80E+01 SE L12457-06 5/23/2007 Fe-59 9.20E+01 4.70E+01 1.50E+02 SE L12457-06 5/23/2007 1-131 5.OOE+01 8.40E+0I 3.OOE+02 SE L12457-06 5/23/2007 K-40 1.73E+04 7.80E+02 6.40E+02 SE L12457-06 5/23/2007 La-140 2.60E+01 8. 1OE+0I 3.OOE+02 SE L12457-06 5/23/2007 Mn-54 4.10E+01 1.70E+01 5.1OE+01 SE L12457-06 5/23/2007 Nb-95 1.80E+01 2.60E+01 9.OOE+01 SE L12457-06 5/23/2007 Ru-103 2.OOE+00 2.1OE+01 7.50E+01 SE L12457-06 5/23/2007 Ru-106 -1.50E+02 1.50E+02 5.90E+02 SE L12457-06 5/23/2007 Sb-124 -2. I OE+01 1.50E+01 9.60E+0 1 SE L12457-06 5/23/2007 Sb-125 -1.60E+01 3.50E+01 1.30E+02 SE L12457-06 5/23/2007 Se-75 -1.70E+01 2. 1OE+0I 7.70E+01 SE L12457-06 5/23/2007 Zn-65 -5.50E+01 5.OOE+01 1.90E+02 SE L12457-06 5/23/2007 Zr-95 -3.80E+01 2.70E+01 1.20E+02 SE L13301-04 11/20/2007 AcTh-228 2.84E+02 6.70E+01 2.40E+02 SE L13301-04 11/20/2007 Ag-108m -1.80E+01 1.20E+01 4.60E+01 SE L13301-04 11/20/2007 Ag-il0m 9.OOE+00 1.20E+01 4.40E+01 SE L13301-04 11/20/2007 Ba-140 6.OOE+01 1.40E+02 5.1OE+02 SE L13301-04 11/20/2007 Be-7 -2.OOE+01 1.20E+02 4.40E+02 SE L13301-04 11/20/2007 Ce- 141 -2.60E+01 2.90E+01 1.00E+02 SE L13301-04 11/20/2007 Ce-144 -I.1OE+01 8.70E+01 3.1OE+02 SE L13301-04 11/20/2007 Co-57 -1.00E+00 1.20E+01 4.20E+01 SE L13301-04 11/20/2007 Co-58 -2. 1OE+01 1.40E+01 5.90E+01 SE L13301-04 11/20/2007 Co-60 5.OOE+00 1.40E+01 5.1OE+0I SE L13301-04 11/20/2007 Cr-51 -1.20E+02 1.70E+02 6.40E+02 SE L13301-04 11/20/2007 Cs-134 7.OOE+00 2.20E+01 7.40E+01 SE L13301-04 11/20/2007 Cs-137 -6.OOE+00 1.40E+01 5.20E+01 SE L13301-04 11/20/2007 Fe-59 -3.30E+0 1 4.OOE+01 1.50E+02 SE L13301-04 11/20/2007 1-131 -9.40E+01 6.30E+01 2.50E+02 SE L13301-04 11/20/2007 K-40 1.63E+04 6.80E+02 6.20E+02 SE L13301-04 11/20/2007 La-140 0.OOE+00 7.OOE+01 2.50E+02 SE L13301-04 11/20/2007 Mn-54 1.40E+01 1.50E+01 5.1OE+01 SE L13301-04 11/20/2007 Nb-95 1.30E+01 2.40E+01 8.20E+01 SE L13301-04 11/20/2007 Ru-103 -3.OOE+00 1.60E+01 5.90E+01 SE L13301-04 11/20/2007 Ru-106 5.OOE+01 1.20E+02 4.20E+02 SE L13301-04 11/20/2007 Sb-124 -4.80E+01 2.30E+0I 1.20E+02 SE L13301-04 11/20/2007 Sb-125 -4.30E+01 3.40E+01 1.30E+02 SE L13301-04 11/20/2007 Se-75 -3.OOE+00 1.90E+01 6.80E+01 SE L13301-04 11/20/2007 Zn-65 -8.80E+01 4.20E+01 1.70E+02 SE L13301-04 11/20/2007 Zr-95 -2.OOE+01 2.1OE+01 1.00E+02 SE L13301-05 11/20/2007 AcTh-228 3.30E+02 1.1OE+02 3.50E+02 SE L13301-05 11/20/2007 Ag-108m 8.OOE+00 1.20E+01 4.40E+01 SE L13301-05 11/20/2007 Ag-ll0m -3.70E+01 1.70E+01 7.50E+01 SE L13301-05 11/20/2007 Ba-140 1.1OE+02 1.70E+02 6.OOE+02 SE L13301-05 11/20/2007 Be-7 1.00E+02 1.90E+02 6.80E+02 SE L13301-05 11/20/2007 Ce-141 3.70E+01 3.20E+01 1.1OE+02 SE L13301-05 11/20/2007 Ce-144 -6.80E+01 8.20E+01 3.OOE+02 SE L13301-05 11/20/2007 Co-57 1.30E+01 1.00E+01 3.40E+01 SE L13301-05 11/20/2007 Co-58 3.10E+01 2.20E+01 7.20E+01 SE L13301-05 11/20/2007 Co-60 2.60E+01 1.70E+01 5.30E+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-139-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L13301-05 11/20/2007 Cr-51 -1.30E+02 1.80E+02 6.70E+02 SE L13301-05 11/20/2007 Cs-134 -2.OOE+00 1.40E+01 5.30E+0I SE L13301-05 11/20/2007 Cs-137 1.80E+01 1.60E+01 5.50E+01 SE L13301-05 11/20/2007 Fe-59 -1.06E+02 6.30E+0I 2.60E+02 SE L13301-05 11/20/2007 1-131 5.30E+0I 7.90E+01 2.80E+02 SE L13301-05 11/20/2007 K-40 1.75E+04 9.40E+02 9.40E+02 SE L13301-05 11/20/2007 La- 140 -5.40E+01 9.60E+01 3.70E+02 SE L13301-05 11/20/2007 Mn-54 2.30E+01 2.40E+01 8.10E+01 SE L13301-05 11/20/2007 Nb-95 -2.OOE+00 2.70E+01 1.OOE+02 SE L13301-05 11/20/2007 Ru-103 -1.00E+01 2.OOE+01 7.80E+01 SE L13301-05 11/20/2007 Ru- 106 -1.60E+02 1.50E+02 6.OOE+02 SE L13301-05 11/20/2007 Sb- 124 5.80E+01 3.60E+01 1.1OE+02 SE L13301-05 11/20/2007 Sb-125 2.50E+01 3.70E+01 1.30E+02 SE L13301-05 11/20/2007 Se-75 -1.30E+01 2.OOE+01 7.30E+0I SE L13301-05 11/20/2007 Zn-65 -1.58E+02 5.60E+0I 2.40E+02 SE L13301-05 11/20/2007 Zr-95 -6.OOE+00 2.60E+01 1.1OE+02 SE L13301-06 11/20/2007 AcTh-228 -1.30E+02 1.40E+02 5.40E+02 SE L13301-06 11/20/2007 Ag-108m 0.OOE+00 1.30E+01 4.80E+01 SE L13301-06 11/20/2007 Ag-lr0m 2.90E+01 1.90E+01 6.30E+01 SE L13301-06 11/20/2007 Ba-140 8.OOE+01 1.60E+02 5.80E+02 SE L13301-06 11/20/2007 Be-7 -2.OOE+02 1.60E+02 6.60E+02 SE L13301-06 11/20/2007 Ce- 141 -2.50E+01 3.30E+01 1.20E+02 SE L13301-06 11/20/2007 Ce- 144 1.00E+01 1.00E+02 3.50E+02 SE L13301-06 11/20/2007 Co-57 *4.OOE+00 1.30E+01 4.30E+0 1 SE L13301-06 11/20/2007 Co-58 3.30E+01 2.1OE+0I 6.80E+01 SE L13301-06 11/20/2007 Co-60 2.20E+01 2.50E+01 8.60E+01 SE L13301-06 11/20/2007 Cr-51 -2.30E+02 2.20E+02 8.20E+02 SE L13301-06 11/20/2007 Cs-134 -5.OOE+00 2.60E+0I 9.50E+01 SE L13301-06 11/20/2007 Cs-137 -2.60E+01 2.OOE+01 8.OOE+01 SE L13301-06 11/20/2007 Fe-59 -1.OOE+01 4.60E+01 1.80E+02 SE L13301-06 11/20/2007 1-131 -1.33E+02 8.50E+01 3.40E+02 SE L13301-06 11/20/2007 K-40 1.76E+04 9.20E+02 8.30E+02 SE L13301-06 11/20/2007 La-140 -1.40E+01 9.1OE+0I 3.40E+02 SE L13301-06 11/20/2007 Mn-54 -4.OOE+01 1.70E+01 7.50E+01 SE L13301-06 11/20/2007 Nb-95 -9.OOE+00 2.60E+01 1.00E+02 SE L13301-06 11/20/2007 Ru-103 -3.OOE+00 2.OOE+01 7.60E+0I SE L13301-06 11/20/2007 Ru- 106 2.50E+02 1.80E+02 5.90E+02 SE L13301-06 11/20/2007 Sb-124 -4.30E+01 3.20E+01 1.70E+02 SE L13301-06 11/20/2007 Sb-125 5.80E+01 4.1 OE+01 1.40E+02 SE L13301-06 11/20/2007 Se-75 4.OOE+00 1.90E+01 6.80E+01 SE L13301-06 11/20/2007 Zn-65 -9.90E+01 5.60E+01 2.30E+02 SE L13301-06 11/20/2007 Zr-95 2.70E+01 3.40E+01 1.50E+02 SE L12457-07 5/23/2007 AcTh-228 4.20E+02 1.20E+02 3.40E+02 SE L12457-07 5/23/2007 Ag-108m 7.OOE+00 1.40E+01 5.1OE+0I SE L12457-07 5/23/2007 Ag-il0m -1.40E+01 2.50E+01 1.00E+02 SE L12457-07 5/23/2007 Ba-140 2.20E+02 1.80E+02 6.1OE+02 SE L12457-07 5/23/2007 Be-7 -2.20E+02 1.70E+02 6.90E+02 SE L12457-07 5/23/2007 Ce- 141 -8.103E+01 3.80E+01 1.40E+02 SE L12457-07 5/23/2007 Ce-144 1.00E+01 8.60E+01 3.1OE+02 SE L12457-07 5/23/2007 Co-57 1.00E+01 1.20E+01 4.OOE+01 SE L12457-07 5/23/2007 Co-58 3.1OE+0I 2.40E+0 1 8.10E+01 SE L12457-07 5/23/2007 Co-60 -1.60E+01 2.1OE+0I 9.1OE+01 SE L12457-07 5/23/2007 Cr-51 8.OOE+01 1.90E+02 6.80E+02 SE L12457-07 5/23/2007 Cs-134 -2.1OE+01 1.50E+01 6.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-140-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-07 5/23/2007 Cs-137 1.1OE+OI 1.80E+01 6.40E+01 SE L12457-07 5/23/2007 Fe-59 1.56E+02 7.30E+01 2.30E+02 SE L12457-07 5/23/2007 1-131 -9.30E+OI 8.80E+01 3.60E+02 SE L12457-07 5/23/2007 K-40 2.17E+04 1.1OE+03 7.50E+02 SE L12457-07 5/23/2007 La-140 -9.20E+01 8.80E+01 3.70E+02 SE L12457-07 5/23/2007 Mn-54 -7.OOE+00 2.OOE+01 8.OOE+01 SE L12457-07 5/23/2007 Nb-95 -6.40E+01 2.90E+01 1.30E+02 SE L12457-07 5/23/2007 Ru-103 8.00E+00 2.30E+01 8.60E+01 SE L12457-07 5/23/2007 Ru-106 -2.20E+02 1.50E+02 6.50E+02 SE L12457-07 5/23/2007 Sb-124 0.OOE+00 3.60E+01 1.70E+02 SE L12457-07 5/23/2007 Sb-125 8.OOE+00 4.90E+01 1.80E+02 SE L12457-07 5/23/2007 Se-75 -1.20E+01 2.20E+01 8.1OE+01 SE L12457-07 5/23/2007 Zn-65 -4.OOE+01 6.40E+01 2.50E+02 SE L12457-07 5/23/2007 Zr-95 2.1OE+01 3.OOE+01 1.1OE+02 SE L12457-08 5/23/2007 AcTh-228 2.90E+02 1.70E+02 5.40E+02 SE L12457-08 5/23/2007 Ag-108m 5.OOE+00 1.80E+01 6.50E+01 SE L12457-08 5/23/2007 Ag-ll0m 0.OOE+00 3.40E+01 1.30E+02 SE L12457-08 5/23/2007 Ba-140 -1.90E+02 1.70E+02 7.20E+02 SE L12457-08 5/23/2007 Be-7 1.00E+02 1.80E+02 6.40E+02 SE L12457-08 5/23/2007 Ce- 141 -3.OOE+01 3.70E+01 1.40E+02 SE L12457-08 5/23/2007 Ce-i144 8.OOE+01 1.20E+02 4.1OE+02 SE L12457-08 5/23/2007 Co-57 7.OOE+00 1.40E+01 4.90E+01 SE L12457-08 5/23/2007 Co-58 -4.80E+01 2.OOE+01 9.70E+01 SE L12457-08 5/23/2007 Co-60 -I.IOE+01 2.40E+01 9.80E+01 SE L12457-08 5/23/2007 Cr-51 2.OOE+02 2.40E+02 8.30E+02 SE L12457-08 5/23/2007 Cs-134 3.OOE+00 1.80E+01 6.60E+01 SE L12457-08 5/23/2007 Cs-137 -4.90E+01 2.1 OE+01 9.30E+OI SE L12457-08 5/23/2007 Fe-59 -8.60E+01 7.1OE+01 2.90E+02 SE L12457-08 5/23/2007 1-131 0.OOE+00 1.40E+02 5.OOE+02 SE L12457-08 5/23/2007 K-40 2.09E+04 1.10E+03 1.1OE+03 SE L12457-08 5/23/2007 La-140 -6.OOE+01 1.1 OE+02 4.40E+02 SE L12457-08 5/23/2007 Mn-54 -1.20E+01 2.OOE+01 8.1OE+OI SE L12457-08 5/23/2007 Nb-95 -4.20E+01 3.1OE+OI 1.30E+02 SE L12457-08 5/23/2007 Ru-103 6.60E+01 2.60E+01 7.60E+01 SE L12457-08 5/23/2007 Ru-106 -2.80E+02 2.20E+02 8.60E+02 SE L12457-08 5/23/2007 Sb-124 3.60E+01 4.50E+01 1.70E+02 SE L12457-08 5/23/2007 Sb- 125 1.01E+02 4.80E+01 1.50E+02 SE L12457-08 5/23/2007 Se-75 -6.OOE+00 2.20E+01 8.OOE+01 SE L12457-08 5/23/2007 Zn-65 -6.20E+01 5.90E+01 2.40E+02 SE L12457-08 5/23/2007 Zr-95 -6.OOE+00 3.1OE+01 1.30E+02 SE L12457-09 5/23/2007 AcTh-228 1.69E+02 6.60E+01 2.OOE+02 SE L12457-09 5/23/2007 Ag-108m 1.71E+01 9.10E+00 2.90E+01 SE L12457-09 5/23/2007 Ag- Hom 2.OOE+00 1.90E+01 6.80E+0 1 SE L12457-09 5/23/2007 Ba-140 0.OOE+00 2.40E+01 1.00E+02 SE L12457-09 5/23/2007 Be-7 3.OOE+01 1.1 OE+02 4.OOE+02 SE L12457-09 5/23/2007 Ce-141 -2. 10E+01 2.90E+01 1.00E+02 SE L12457-09 5/23/2007 Ce-144 -8.20E+01 8.60E+OI 3.1OE+02 SE L12457-09 5/23/2007 Co-57 3.OOE+00 1.10E+01 3.80E+01 SE L12457-09 5/23/2007 Co-58 1.20E+01 1.60E+01 5.70E+01 SE L12457-09 5/23/2007 Co-60 -7.OOE+00 1.40E+01 5.40E+01 SE L12457-09 5/23/2007 Cr-51 -1.20E+02 1.90E+02 6.70E+02 SE L12457-09 5/23/2007 Cs-134 2.60E+01 1.60E+01 5.10E+01 SE L12457-09 5/23/2007 Cs-137 -1.00E+00 1.50E+01 5.20E+01 SE L12457-09 5/23/2007 Fe-59 9.OOE+00 3.80E+01 1.40E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-141-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-09 5/23/2007 1-131 -1.47E+02 7.60E+01 3.OOE+02 SE L12457-09 5/23/2007 K-40 2.18E+04 7.OOE+02 5.50E+02

SE L12457-09 5/23/2007 La- 140 0.OOE+00 2.80E+01 1.20E+02 SE L12457-09 5/23/2007 Mn-54 3.OOE+00 1.40E+01 5.OOE+01 SE L12457-09 5/23/2007 Nb-95 -2.OOE+00 2.1OE+01 7.50E+01 SE L12457-09 5/23/2007 Ru-103 1.60E+01 1.70E+01 5.70E+01 SE L12457-09 5/23/2007 Ru-106 -1.60E+02 1.40E+02 5.1OE+02 SE L12457-09 5/23/2007 Sb- 124 1.40E+01 1.90E+01 7.30E+01 SE L12457-09 5/23/2007 Sb-125 5.60E+01 3.OOE+01 9.60E+01 SE L12457-09 5/23/2007 Se-75 7.OOE+00 1.70E+01 6.OOE+01 SE L12457-09 5/23/2007 Zn-65 -1.07E+02 4.40E+0 1 1.70E+02 SE L12457-09 5/23/2007 Zr-95 7.OOE+00 3.OOE+01 1.1OE+02 SE L13301-07 11/20/2007 AcTh-228 1.82E+02 5.OOE+01 1.80E+02

SE L13301-07 11/20/2007 Ag-108m 8.90E+00 9.30E+00 3.20E+01 SE L13301-07 11/20/2007 Ag-110m 1.00E+00 1.00E+01 3.70E+01 SE L13301-07 11/20/2007 Ba-140 -2.OOE+01 1.1 OE+02 4. 1OE+02 SE L13301-07 11/20/2007 Be-7 3.OOE+01 1.1OE+02 3.80E+02 SE L13301-07 11/20/2007 Ce-141 2.90E+01 2.40E+01 8.1OE+01 SE L13301-07 11/20/2007 Ce-144 -3.10E+01 7.OOE+01 2.40E+02 SE L13301-07 11/20/2007 Co-57 -8.70E+00 8.90E+00 3.20E+01 SE L13301-07 11/20/2007 Co-58 -1.90E+01 1.30E+01 5.20E+01 SE L13301-07 11/20/2007 Co-60 -1.00E+01 1.30E+01 4.80E+01 SE L13301-07 11/20/2007 Cr-51 -3.OOE+01 1.30E+02 4.80E+02 SE L13301-07 11/20/2007 Cs-134 -2.OOE+01 1.00E+01 4.OOE+01 SE L13301-07 11/20/2007 Cs-137 -2.50E+01 1.10E+01 4.50E+01 SE L13301-07 11/20/2007 Fe-59 -1.90E+01 3.50E+01 1.30E+02 SE L13301-07 11/20/2007 1-131 6.90E+01 6.20E+01 2.1OE+02 SE L13301-07 11/20/2007 K-40 1.83E+04 5.70E+02 4.50E+02 SE L13301-07 11/20/2007 La-140 1.20E+01 5.50E+01 2.OOE+02 SE L13301-07 11/20/2007 Mn-54 -8.OOE+00 1.10E+01 4.30E+0I SE L13301-07 11/20/2007 Nb-95 6.OOE+00 1.90E+01 6.60E+01 SE L13301-07 11/20/2007 Ru-103 1.00E+00 1.50E+01 5.30E+0 1 SE L13301-07 11/20/2007 Ru-106 -2.OOE+01 1.I OE+02 4. 1OE+02 SE L13301-07 11/20/2007 Sb-124 1.50E+01 2.1OE+01 7.70E+01 SE L13301-07 11/20/2007 Sb-125 3.OOE+00 3.OOE+01 1.1OE+02 SE L13301-07 11/20/2007 Se-75 1.10E+01 1.60E+01 5.40E+01 SE L13301-07 11/20/2007 Zn-65 6.30E+01 5.70E+01 1.90E+02 SE L13301-07 11/20/2007 Zr-95 -2.70E+01 1.80E+01 9.10E+01 SE L13301-08 11/20/2007 AcTh-228 -1.69E+02 9.70E+01 3.80E+02 SE L13301-08 11/20/2007 Ag-108m 1.00E+01 1.20E+01 4.OOE+01 SE L13301-08 11/20/2007 Ag-110m 2.1OE+01 1.50E+01 4.80E+01 SE L13301-08 11/20/2007 Ba-140 1.60E+02 1.20E+02 4.1OE+02 SE L13301-08 11/20/2007 Be-7 -2. 1OE+02 1.50E+02 5.90E+02 SE L13301-08 11/20/2007 Ce- 141 1.90E+01 3.1OE+01 1.00E+02 SE L13301-08 11/20/2007 Ce-144 1.17E+02 9.OOE+01 3.OOE+02 SE L13301-08 11/20/2007 Co-57 1.5OE+01 1.10E+01 3.80E+01 SE L13301-08 11/20/2007 Co-58 -1.10E+01 1.50E+01 5.90E+01 SE L13301-08 11/20/2007 Co-60 -8.OOE+00 1.40E+01 5.70E+01 SE L13301-08 11/20/2007 Cr-51 4.OOE+01 1.80E+02 6.40E+02 SE L13301-08 11/20/2007 Cs-134 -1.60E+01 1.90E+01 7.20E+01 SE L13301-08 11/20/2007 Cs-137 -I.IOE+01 1.50E+01 5.70E+01 SE L13301-08 11/20/2007 Fe-59 -2.40E+01 4.20E+01 1.60E+02 SE L13301-08 11/20/2007 1-131 7.OOE+00 7.70E+01 2.70E+02 SE L13301-08 11/20/2007 K-40 1.94E+04 7.1OE+02 4.70E+02 *

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-142-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L13301-08 11/20/2007 La-140 -1.08E+02 8.OOE+01 3.1OE+02 SE L13301-08 11/20/2007 Mn-54 -2.OOE+00 1.40E+01 5.30E+01 SE L13301-08 11/20/2007 Nb-95 3.OOE+00 2.10E+01 7.60E+0 I SE L13301-08 11/20/2007 Ru-103 -1.50E+01 1.60E+01 6.20E+01 SE L13301-08 11/20/2007 Ru-106 5.OOE+01 1.20E+02 4.30E+02 SE L13301-08 11/20/2007 Sb-124 4.OOE+00 2.60E+01 1.1OE+02 SE L13301-08 11/20/2007 Sb-125 -1.60E+01 3.80E+01 1.40E+02 SE L13301-08 11/20/2007 Se-75 -1.00E+01 1.80E+01 6.40E+01 SE L13301-08 11/20/2007 Zn-65 -1.74E+02 4.80E+01 2.OOE+02 SE L13301-08 11/20/2007 Zr-95 1.40E+01 2.40E+01 1.1 OE+02 SE L13301-09 11/20/2007 AcTh-228 2.14E+02 8.10E+01 2.40E+02 SE L13301-09 11/20/2007 Ag-108m 9.OOE+00 1.60E+01 5.50E+01 SE L13301-09 11/20/2007 Ag-li0m 0.OOE+00 1.80E+01 6.80E+01 SE L13301-09 11/20/2007 Ba-140 -4.80E+02 1.90E+02 8.20E+02 SE L13301-09 11/20/2007 Be-7 5.OOE+01 1.90E+02 6.80E+02 SE L13301-09 11/20/2007 Ce- 141 -3.OOE+00 3.30E+01 1.20E+02 SE L13301-09 11/20/2007 Ce- 144 -1.IOE+01 7.90E+01 2.80E+02 SE L13301-09 11/20/2007 Co-57 -8.OOE+00 1.1OE+01 3.90E+0 1 SE L13301-09 11/20/2007 Co-58 1.80E+01 2.OOE+01 6.90E+01 SE L13301-09 11/20/2007 Co-60 -4.OOE+01 1.80E+01 8.80E+01 SE L13301-09 11/20/2007 Cr-51 -1.30E+02 1.90E+02 7.10E+02 SE L13301-09 11/20/2007 Cs-134 -3.00E+00 1.50E+01 5.70E+01 SE L13301-09 11/20/2007 Cs-137 -1.60E+01 1.70E+01 6.80E+01 SE L13301-09 11/20/2007 Fe-59 0.00E+00 4.50E+01 1.80E+02 SE L13301-09 11/20/2007 1-131 -1.05E+02 8.OOE+01 3.20E+02 SE L13301-09 11/20/2007 K-40 1.75E+04 9.50E+02 7.90E+02

SE L13301-09 11/20/2007 La-140 -1.40E+01 8.70E+01 3.30E+02 SE L13301-09 11/20/2007 Mn-54 5.OOE+00 1.80E+01 6.60E+01 SE L13301-09 11/20/2007 Nb-95 8.OOE+00 2.80E+01 1.00E+02 SE L13301-09 11/20/2007 Ru-103 -2.1OE+01 2.OOE+01 8.20E+01 SE L13301-09 11/20/2007 Ru-106 1.40E+02 1.40E+02 4.80E+02 SE L13301-09 11/20/2007 Sb-124 0.OOE+00 3.1 OE+0 1 1.40E+02 SE L13301-09 11/20/2007 Sb-125 7.OOE+00 4.50E+01 1.60E+02 SE L13301-09 11/20/2007 Se-75 -3.OOE+00 2.00E+01 7.40E+01 SE L13301-09 11/20/2007 Zn-65 -9.60E+01 5.30E+01 2.20E+02 SE L13301-09 11/20/2007 Zr-95 -5.OOE+00 2.60E+01 1.1OE+02 SE L12457-10 5/22/2007 AcTh-228 1.65E+03 1.00E+02 3.20E+02 SE L12457-10 5/22/2007 Ag-108m -4.1OE+01 1.90E+01 7.40E+01 SE L12457-10 5/22/2007 Ag-110m 1.00E+01 2.40E+01 8.70E+01 SE L12457-10 5/22/2007 Ba-140 1.1OE+02 2.50E+02 8.90E+02 SE L12457-10 5/22/2007 Be-7 2.20E+02 2.20E+02 7.30E+02 SE L12457-10 5/22/2007 Ce-141 2.70E+0I 5.OOE+01 1.70E+02 SE L12457-10 5/22/2007 Ce-144 1.20E+02 1.20E+02 4.1OE+02 SE L12457-10 5/22/2007 Co-57 2.1 OE+0 1 1.60E+01 5.30E+01 SE L12457-10 5/22/2007 Co-58 -2.80E+01 2.80E+01 1.1OE+02 SE L12457-10 5/22/2007 Co-60 -1.10E+01 2.20E+01 8.60E+01 SE L12457-10 5/22/2007 Cr-51 -1.30E+02 2.60E+02 9.40E+02 SE L12457-10 5/22/2007 Cs-134 -6.OOE+00 1.80E+01 6.50E+01 SE L12457-10 5/22/2007 Cs-137 -5.OOE+00 2.20E+01 8.OOE+01 SE L12457-10 5/22/2007 Fe-59 -8.60E+0 I 6.30E+01 2.50E+02 SE L12457-10 5/22/2007 1-131 0.OOE+00 1.30E+02 4.70E+02 SE L12457-10 5/22/2007 K-40 1.35E+04 7.60E+02 7.60E+02 SE L12457-10 5/22/2007 La-140 2.20E+02 1.50E+02 4.80E+02 SE L12457-10 5/22/2007 Mn-54 3.20E+0 1 2.OOE+01 6.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-143-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-10 5/22/2007 Nb-95 -4.60E+01 4. 1OE+01 1.50E+02 SE L12457-10 5/22/2007 Ru-103 -6.00E+00 2.80E+01 1.00E+02 SE L12457-10 5/22/2007 Ru-106 -1.30E+02 1.90E+02 7.OOE+02 SE L12457-10 5/22/2007 Sb-124 -3.90E+01 3.90E+01 1.80E+02 SE L12457-10 5/22/2007 Sb-125 -1.60E+01 5.50E+01 2.OOE+02 SE L12457-10 5/22/2007 Se-75 1.80E+01 2.60E+I01 8.70E+01 SE L12457-10 5/22/2007 Zn-65 1.19E+02 9.90E+01 3.30E+02 SE L12457-10 5/22/2007 Zr-95 -6.80E+01 5.80E+01 2.20E+02 SE L12457-11 5/22/2007 AcTh-228 9.63E+02 8.90E+01 2.50E+02 SE L12457-11 5/22/2007 Ag-108m 2.OOE+00 1.40E+01 5.20E+01 SE L12457-11 5/22/2007 Ag-il0m -1.70E+01 2.80E+01 1.1OE+02 SE L12457-11 5/22/2007 Ba-140 -9.40E+01 7.OOE+01 3.OOE+02 SE L12457-11 5/22/2007 Be-7 1.20E+02 1.80E+02 6.40E+02 SE L12457-11 5/22/2007 Ce- 141 -1.00E+01 4.60E+01 1.60E+02 SE L12457-11 5/22/2007 Ce-144 2.OOE+02 2.50E+02 8.40E+02 SE L12457-11 5/22/2007 Co-57 -2.30E+01 1.70E+01 5.90E+01 SE L12457-11 5/22/2007 Co-58 -6.OOE+00 2.30E+01 8.50E+01 SE L12457-11 5/22/2007 Co-60 4.OOE+00 1.80E+01 6.90E+01 SE L12457-11 5/22/2007 Cr-51 2.20E+02 2.70E+02 9.OOE+02 SE L12457-11 5/22/2007 Cs-134 4.1OE+01 2.20E+01 7.20E+01 SE L12457-11 5/22/2007 Cs-137 -1.30E+01 1.90E+01 7.40E+01 SE L12457-11 5/22/2007 Fe-59 5.30E+01 4.50E+0 1 1.60E+02 SE L12457-11 5/22/2007 1-131 9.OOE+01 1.40E+02 4.80E+02 SE L12457-11 5/22/2007 K-40 1.25E+04 7.40E+02 7.50E+02 SE L12457-11 5/22/2007 La-140 -1.08E+02 8.OOE+01 3.50E+02 SE L12457-11 5/22/2007 Mn-54 1.30E+01 2.OOE+01 7.20E+01 SE L12457-11 5/22/2007 Nb-95 -4.30E+01 3.30E+01 1.30E+02 SE L12457-11 5/22/2007 Ru-103 2.50E+01 2.60E+01 8.80E+01 SE L12457-11 5/22/2007 Ru-106 -2.1 OE+02 2.1OE+02 8.OOE+02 SE L12457-11 5/22/2007 Sb- 124 -2.60E+0 1 3.70E+01 1.70E+02 SE L12457-11 5/22/2007 Sb-125 1.90E+01 4.90E+01 1.80E+02 SE L12457-11 5/22/2007 Se-75 1.80E+01 2.50E+01 8.50E+01 SE L12457-11 5/22/2007 Zn-65 -5.90E+01 8.10E+01 2.90E+02 SE L12457-I1 5/22/2007 Zr-95 -5.40E+01 4.1OE+01 1.60E+02 SE LI2457-12 5/22/2007 AcTh-228 9.05E+02 8.80E+01 2.70E+02 SE L12457-12 5/22/2007 Ag-108m 2.OOE+00 1.60E+01 5.80E+01 SE L12457-12 5/22/2007 Ag-ll0m 0.OOE+00 2.60E+01 9.60E+01 SE L12457-12 5/22/2007 Ba-140 3.30E+02 2.40E+02 8.OOE+02 SE L12457-12 5/22/2007 Be-7 -2.OOE+01 2.OOE+02 7.20E+02 SE L12457-12 5/22/2007 Ce- 141 7.20E+01 4.60E+01 1.50E+02 SE L12457-12 5/22/2007 Ce-144 5.OOE+01 1.30E+02 4.60E+02 SE L12457-12 5/22/2007 Co-57 -2.OOE+01 1.70E+0 I 6.1OE+01 SE L12457-12 5/22/2007 Co-58 -4.80E+01 2.50E+01 9.90E+01 SE L12457-12 5/22/2007 Co-60 0.OOE+00 1.70E+01 6.60E+01 SE L12457-12 5/22/2007 Cr-51 -3.OOE+01 2.80E+02 9.90E+02 SE L12457-12 5/22/2007 Cs-134 2.OOE+00 1.70E+01 6.10E+01 SE L12457-12 5/22/2007 Cs-137 -1.40E+01 1.90E+01 7.40E+01 SE L12457-12 5/22/2007 Fe-59 -3.40E+01 4.90E+01 1.90E+02 SE L12457-12 5/22/2007 1-131 -1.90E+02 1.40E+02 5°30E+02 SE L12457-12 5/22/2007 K-40 1.20E+04 6.80E+02 7.40E+02 SE L12457-12 5/22/2007 La- 140 -7.20E+01 9.90E+01 3.80E+02 SE L12457-12 5/22/2007 Mn-54 1.60E+01 1.90E+01 6.50E+01 SE L12457-12 5/22/2007 Nb-95 1.1 OE+0 I 3.40E+0 I 1.20E+02 SE L12457-12 5/22/2007 Ru-103 -4.90E+01 2.90E+01 1.1 OE+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-144-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE L12457-12 5/22/2007 Ru-106 2.40E+02 1.90E+02 6'50E+02 SE L12457-12 5/22/2007 Sb-124 2.20E+01 2.70E+01 1.OOE+02 SE L12457-12 5/22/2007 Sb-125 -5.1OE+01 4.60E+01 1.80E+02 SE L12457-12 5/22/2007 Se-75 -5.80E+01 2.60E+01 I.OOE+02 SE L12457-12 5/22/2007 Zn-65 4.OOE+01 8.60E+01 2.90E+02 SE L12457-12 5/22/2007 Zr-95 -3.80E+01 3.20E+01 1.50E+02 SE L13301-10 11/26/2007 AcTh-228 2.26E+03 1.50E+02 5.30E+02 SE L13301-10 11/26/2007 Ag-108m -2.OOE+01 2.80E+01 I.OOE+02 SE L13301-10 11/26/2007 Ag-lOrn -8.OOE+00 2.60E+01 9.90E+01 SE L13301-10 11/26/2007 Ba-140 0.OOE+00 2.20E+02 8.OOE+02 SE L13301-10 11/26/2007 Be-7 -7.OOE+01 2.80E+02 1.OOE+03 SE L13301-10 11/26/2007 Ce-141 8.90E+01 6.OOE+01 2.OOE+02 SE L13301-10 11/26/2007 Ce-144 1.OOE+01 1.70E+02 5.80E+02 SE L13301-10 11/26/2007 Co-57 1.90E+01 2.20E+01 7.30E+01 SE L13301-10 11/26/2007 Co-58 2.OOE+00 3.30E+01 1.20E+02 SE L13301-10 11/26/2007 Co-60 -2.60E+01 3.70E+01 1.50E+02 SE L13301-10 11/26/2007 Cr-51 1.60E+02 2.90E+02 1.OOE+03 SE L13301-10 11/26/2007 Cs-134 5.70E+01 2.60E+01 8.OOE+01 SE L13301-10 11/26/2007 Cs-137 -4.OOE+00 3.1 OE+0 1 1.I10OE+02 SE L13301-10 11/26/2007 Fe-59 -6.3 OE+0 1 6.80E+01 2.80E+02 SE L13301-10 11/26/2007 1-131 -1.57E+02 9.20E+01 3.60E+02 SE L13301-10 11/26/2007 K-40 1.17E+04 9.1OE+02 9.80E+02 SE L13301-10 11/26/2007 La-140 3.OOE+01 1.30E+02 4.60E+02 SE L13301-10 11/26/2007 Mn-54 -3.90E+01 3.50E+01 1.40E+02 SE L13301-10 11/26/2007 Nb-95 -1.OOE+01 6.60E+01 2.30E+02 SE L13301-10 11/26/2007 Ru-103 5.20E+01 3.30E+01 1.1OE+02 SE L13301-10 11/26/2007 Ru-106 3.30E+02 2.20E+02 7.40E+02 SE L13301-10 11/26/2007 Sb-124 -7.80E+01 6.80E+01 3.1OE+02 SE L13301-10 11/26/2007 Sb-125 3.50E+01 8. 1OE+01 2.80E+02 SE L13301-10 11/26/2007 Se-75 -3.OOE+00 3.60E+01 1.30E+02 SE L13301-10 11/26/2007 Zn-65 9.OOE+01 1.30E+02 4.60E+02 SE L13301-10 11/26/2007 Zr-95 1.30E+01 6.40E+01 2.30E+02 SE L13301-11 11/26/2007 AcTh-228 1.24E+03 8.40E+01 2.60E+02 SE L13301-11 11/26/2007 Ag-108m 2.OOE+00 1.70E+01 5.90E+01 SE L13301-11 11/26/2007 Ag-I lOln -1.30E+01 1.50E+01 5.60E+01 SE L13301-11 11/26/2007 Ba-140 5.OOE+01 1.40E+02 5.OOE+02 SE L13301-11 11/26/2007 Be-7 -1.40E+02 1.70E+02 6.30E+02 SE L13301-11 11/26/2007 Ce-141 3.OOE+00 4. 1OE+01 1.40E+02 SE L13301-11 11/26/2007 Ce-144 -1.70E+02 1.40E+02 4.90E+02 SE L13301-11 11/26/2007 Co-57 1.OOE+00 1.60E+01 5.60E+01 SE L13301-11 11/26/2007 Co-58 -2.40E+01 1.80E+01 7.1OE+01 SE L13301-11 11/26/2007 Co-60 0.OOE+00 1.70E+01 6.50E+01 SE L13301-11 11/26/2007 Cr-51 2.60E+02 2.20E+02 7.20E+02 SE L13301-11 11/26/2007 Cs-134 6.OOE+00 1.80E+01 6.20E+01 SE L13301-11 11/26/2007 Cs-137 -2.70E+01 1.60E+01 6.40E+01 SE L13301-11 11/26/2007 Fe-59 -2.90E+01 4.20E+01 1.60E+02 SE L13301-11 11/26/2007 1-131 -7.60E+01 6.40E+01 2.30E+02 SE L13301-11 11/26/2007 K-40 1.25E+04 6.30E+02 7.1OE+02 SE L13301-11 11/26/2007 La-140 8.80E+01 7.10E+01 2.40E+02 SE L13301-11 11/26/2007 Mn-54 -2.OOE+00 1.90E+01 6.80E+0 I SE L13301-11 11/26/2007 Nb-95 4.OOE+01 3.OOE+01 9.90E+01 SE L13301-11 11/26/2007 Ru-103 1.50E+01 2.20E+01 7.50E+01 SE L13301-11 11/26/2007 Ru-106 4.OOE+01 1.60E+02 5.70E+02 SE L13301-11 11/26/2007 Sb-124 -2.50E+01 2.70E+01 1.20E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-145-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCilkg) (pCilkg) (pCi/kg)

SE 52 L13301-11 11/26/2007 Sb-125 -4.70E+01 4.80E+01 1.80E+02 SE 52 L13301-11 11/26/2007 Se-75 -4.OOE+00 2.70E+0I 9.50E+01 SE 52 L13301-11 11/26/2007 Zn-65 6.OOE+00 8.30E+01 2.90E+02 SE 52 L13301-11 11/26/2007 Zr-95 8.70E+01 3.80E+01 1.20E+02 SE 52 L13301-12 11/26/2007 AcTh-228 1.09E+03 7.30E+01 2.40E+02 SE 52 L13301-12 11/26/2007 Ag-108m -1.50E+01 1.60E+01 6.OOE+01 SE 52 L13301-12 11/26/2007 Ag-110m 9.OOE+00 1.60E+01 5.50E+01 SE 52 L13301-12 11/26/2007 Ba-140 -3.OOE+01 1.10E+02 3.90E+02 SE 52 L13301-12 11/26/2007 Be-7 1.60E+02 1.50E+02 5.1OE+02 SE 52 L13301-12 11/26/2007 Ce-141 2.50E+01 3.80E+01 1.30E+02 SE 52 L13301-12 11/26/2007 Ce-144 -1.00E+01 1.30E+02 4.50E+02 SE 52 L13301-12 11/26/2007 Co-57 2.OOE+00 1.60E+01 5.40E+01 SE 52 L13301-12 11/26/2007 Co-58 -4.OOE+00 1.70E+01 6.40E+0I SE 52 L13301-12 11/26/2007 Co-60 3.1OE+0I 1.80E+01 5.70E+01 SE 52 L13301-12 11/26/2007 Cr-51 -1.60E+02 2.1OE+02 7.60E+02 SE 52 L13301-12 11/26/2007 Cs-134 0.OOE+00 1.90E+01 6.70E+01 SE 52 L13301-12 11/26/2007 Cs-137 -1.50E+01 1.80E+01 6.60E+01 SE 52 L13301-12 11/26/2007 Fe-59 -1.90E+01 3.50E+01 1.30E+02 SE 52 L13301-12 11/26/2007 1-131 1.70E+01 6.1OE+01 2.1OE+02 SE 52 L13301-12 11/26/2007 K-40 1.38E+04 6.1OE+02 5.30E+02 SE 52 L13301-12 11/26/2007 La-140 -2.80E+01 6.80E+01 2.50E+02 SE 52 L13301-12 11/26/2007 Mn-54 2.80E+01 1.70E+01 5.40E+0 1 SE 52 L13301-12 11/26/2007 Nb-95 -2.OOE+00 2.10E+01 7.50E+01 SE 52 L13301-12 11/26/2007 Ru-103 -5.OOE+00 1.80E+01 6.50E+01 SE 52 L13301-12 11/26/2007 Ru- 106 7.OOE+01 1.50E+02 5.1OE+02 SE 52 L13301-12 11/26/2007 Sb-124 -6.80E+01 3.20E+01 1.50E+02 SE 52 L13301-12 11/26/2007 Sb-125 -5. 1OE+0I 5.OOE+01 1.80E+02 SE 52 L13301-12 11/26/2007 Se-75 7.OOE+00 2.30E+01 7.80E+01 SE 52 L13301-12 11/26/2007 Zn-65 -8.10E+01 7.80E+01 2.80E+02 SE 52 L13301-12 11/26/2007 Zr-95 3.OOE+00 3.OOE+01 1.1OE+02 SE 57 L12457-13 5/21/2007 AcTh-228 4.85E+02 8.40E+01 2.OOE+02 SE 57 L12457-13 5/21/2007 Ag-108m -1.70E+01 1.1OE+01 4.50E+01 SE 57 L12457-13 5/21/2007 Ag-ll0m 7.OOE+00 1.80E+01 6.70E+01 SE 57 L12457-13 5/21/2007 Ba-140 -7.OOE+01 1.90E+02 7.30E+02 SE 57 L12457-13 5/21/2007 Be-7 4.OOE+01 1.50E+02 5.50E+02 SE 57 L12457-13 5/21/2007 Ce- 141 6.40E+01 3.50E+01 1.1OE+02 SE 57 L12457-13 5/21/2007 Ce-144 2.70E+01 9.80E+01 3.40E+02 SE 57 L12457-13 5/21/2007 Co-57 1.20E+01 1.20E+01 4.OOE+01 SE 57 L12457-13 5/21/2007 Co-58 -1.50E+01 1.70E+01 6.90E+01 SE 57 L12457-13 5/21/2007 Co-60 1.00E+01 1.60E+01 6.OOE+01 SE 57 L12457-13 5/21/2007 Cr-51 7.OOE+01 2.1OE+02 7.50E+02 SE 57 L12457-13 5/21/2007 Cs-134 1.10E+01 2.OOE+01 6.70E+0I SE 57 L12457-13 5/21/2007 Cs-137 -1.90E+01 1.40E+01 5.80E+01 SE 57 L12457-13 5/21/2007 Fe-59 3.30E+-01 4.50E+01 1.60E+02 SE 57 L12457-13 5/21/2007 1-131 -1.30E+02 1.30E+02 4.80E+02 SE 57 L12457-13 5/21/2007 K-40 1.57E+04 7.40E+02 6.90E+02 SE 57 L12457-13 5/21/2007 La-140 -1.72E+02 9.1OE+01 1.00E+03 SE 57 L12457-13 5/21/2007 Mn-54 -2.30E+01 1.50E+01 6.20E+01 SE 57 L12457-13 5/21/2007 Nb-95 5.60E+01 2.1OE+O1 6.10E+01 SE 57 L12457-13 5/21/2007 Ru-103 -2.70E+01 2.20E+01 8.50E+01 SE 57 L12457-13 5/21/2007 Ru-106 -7.OOE+01 1.50E+02 5.60E+02 SE 57 L12457-13 5/21/2007 Sb-124 6.30E+01 2.60E-+0I 2.80E+01 SE 57 L12457-13 5/21/2007 Sb-125 -2.10E+01 3.70E+01 1.40E+02 SE 57 L12457-13 5/21/2007 Se-75 1.70E+01 2.20E+01 7.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-146-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE 57 L12457-13 5/21/2007 Zn-65 -6.40E+0 1 4.60E+01 1.80E+02 SE 57 L12457-13 5/21/2007 Zr-95 1.30E+01 2.1OE+01 8.OOE+01 SE 57 L12457-14 5/21/2007 AcTh-228 2. 1OE+02 1.40E+02 4.1OE+02 SE 57 L12457-14 5/21/2007 Ag-108m -3.OOE+00 1.40E+01 5.40E+0 1 SE 57 L12457-14 5/21/2007 Ag-110m 2.OOE+01 2.70E+01 9.70E+01 SE 57 L12457-14 5/21/2007 Ba-140 -2.1 OE+02 2.20E+02 9.1OE+02 SE 57 L12457-14 5/21/2007 Be-7 -1.30E+02 1.50E+02 6.40E+02 SE 57 L12457-14 5/21/2007 Ce-141 -4.90E+01 3.90E+01 1.40E+02 SE 57 L12457-14 5/21/2007 Ce-144 -3.30E+01 7.60E+01 2.80E+02 SE 57 L12457-14 5/21/2007 Co-57 -2.OOE+00 1.1OE+01 4.OOE+01 SE 57 L12457-14 5/21/2007 Co-58 1.80E+01 1.40E+01 5.OOE+01 SE 57 L12457-14 5/21/2007 Co-60 1.40E+01 2.20E+01 8.20E+01 SE 57 L12457-14 5/21/2007 Cr-51 -3.70E+02 2.OOE+02 8.50E+02 SE 57 L12457-14 5/21/2007 Cs-134 -9.OOE+00 1.90E+01 7.70E+01 SE 57 L12457-14 5/21/2007 Cs-137 -4.OOE+00 1.90E+01 7.40E+01 SE 57 L12457-14 5/21/2007 Fe-59 -5.10E+01 6.30E+01 2.60E+02 SE 57 L12457-14 5/21/2007 1-131 2.20E+02 1.20E+02 3.70E+02 SE 57 L12457-14 5/21/2007 K-40 1.44E+04 9.30E+02 7.70E+02 SE 57 L12457-14 5/21/2007 La-140 8.OOE+01 1.30E+02 4.60E+02 SE 57 L12457-14 5/21/2007 Mn-54 -1.00E+01 1.90E+01 7.60E+01 SE 57 L12457-14 5/21/2007 Nb-95 1.1OE+01 3.50E+01 1.30E+02 SE 57 L12457-14 5/21/2007 Ru-103 6.20E+01 2.40E+0 1 6.70E+01 SE 57 L12457-14 5/21/2007 Ru-106 3.OOE+01 1.40E+02 5.50E+02 SE 57 L12457-14 5/21/2007 Sb-124 0.OOE+00 2.70E+0 1 1.40E+02 SE 57 L12457-14 5/21/2007 Sb-125 2.30E+01 4.60E+0 1 1.70E+02 SE 57 L12457-14 5/21/2007 Se-75 -2.30E+01 2.1OE+01 8.1OE+01 SE 57 L12457-14 5/21/2007 Zn-65 3.20E+01 5.OOE+01 1.80E+02 SE 57 L12457-14 5/21/2007 Zr-95 1.90E+01 3.1OE+01 1.20E+02 SE 57 L12457-15 5/21/2007 AcTh-228 5.82E+02 9.70E+01 2.70E+02 SE 57 L12457-15 5/21/2007 Ag-108m 1.50E+01 1.50E+01 5.1OE+0I SE 57 L12457-15 5/21/2007 Ag-Il0m -1.80E+01 2.80E+01 1.20E+02 SE 57 L12457-15 5/21/2007 Ba-140 -5.O0E+01 2.OOE+02 8.1OE+02 SE 57 L12457-15 5/21/2007 Be-7 1.30E+02 2.OOE+02 7.20E+02 SE 57 L12457-15 5/21/2007 Ce- 141 -3.40E+01 4.60E+01 1.70E+02 SE 57 L12457-15 5/21/2007 Ce- 144 2.OOE+01 1.20E+02 4.20E+02 SE 57 L12457-15 5/21/2007 Co-57 9.OOE+00 1.50E+01 5.1OE+01 SE 57 L12457-15 5/21/2007 Co-58 -1.60E+01 2.OOE+01 8.60E+0 1 SE 57 L12457-15 5/21/2007 Co-60 8.OOE+00 2.OOE+01 7.90E+01 SE 57 L12457-15 5/21/2007 Cr-51 3.80E+02 2.70E+02 9.1OE+02 SE 57 L12457-15 5/21/2007 Cs-134 1.50E+01 3.OOE+01 1.OOE+02 SE 57 L12457-15 5/21/2007 Cs-137 -2.1OE+01 2.20E+01 8.90E+01 SE 57 L12457-15 5/21/2007 Fe-59 0.OOE+00 5.90E+01 2.30E+02 SE 57 L12457-15 5/21/2007 1-131 -2.OOE+01 1.70E+02 6.1OE+02 SE 57 L12457-15 5/21/2007 K-40 1.23E+04 8.50E+02 7.90E+02 SE 57 L12457-15 5/21/2007 La- 140 9.OOE+01 1.1OE+02 3.90E+02 SE 57 L12457-15 5/21/2007 Mn-54 4.40E+01 1.90E+01 5.60E+01 SE 57 L12457-15 5/21/2007 Nb-95 -2.70E+01 3.OOE+01 1.20E+02 SE 57 L12457-15 5/21/2007 Ru-103 1.80E+01 2.40E+0 1 8.40E+01 SE 57 L12457-15 5/21/2007 Ru-106 -5.OOE+01 1.60E+02 6.30E+02 SE 57 L12457-15 5/21/2007 Sb-124 3.70E+01 5.20E+01 2.OOE+02 SE 57 L12457-15 5/21/2007 Sb-125 6.30E+0 I 4.40E+01 1.50E+02 SE 57 L12457-15 5/21/2007 Se-75 0.OOE+00 2.40E+01 8.80E+01 SE 57 L12457-15 5/21/2007 Zn-65 -1.53E+02 5.70E+01 2.60E+02 SE 57 L12457-15 5/21/2007 Zr-95 -6.20E+01 4.10E+01 1.90E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-147-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE 57 L13301-13 11/19/2007 AcTh-228 2.47E+02 9.10E+01 2.70E+02 SE 57 L13301-13 11/19/2007 Ag-108m 2.OOE+00 1.20E+01 4.60E+01 SE 57 L13301-13 11/19/2007 Ag-il0in 2.OOE+01 1.60E+01 5.30E+01 SE 57 L13301-13 11/19/2007 Ba-140 -6.OOE+01 1.50E+02 5.80E+02 SE 57 L13301-13 11/19/2007 Be-7 5.OOE+01 1.80E+02 6.30E+02 SE 57 L13301-13 11/19/2007 Ce- 141 1.60E+01 3.30E+01 1.1OE+02 SE 57 L13301-13 11/19/2007 Ce- 144 -4.20E+01 7.80E+01 2.90E+02 SE 57 L13301-13 11/19/2007 Co-57 -5.30E+00 9.20E+00 3.40E+01 SE 57 L13301-13 11/19/2007 Co-58 2.1OE+01 2.OOE+01 7.10E+01 SE 57 L13301-13 11/19/2007 Co-60 4.OOE+00 2.30E+01 8.80E+01 SE 57 L13301-13 11/19/2007 Cr-51 -1.30E+02 1.80E+02 6.90E+02 SE 57 L13301-13 11/19/2007 Cs-134 5.OOE+00 1.80E+01 6.40E+0I SE 57 L13301-13 11/19/2007 Cs-137 -3.70E+01 1.70E+01 7.30E+01 SE 57 L13301-13 11/19/2007 Fe-59 2.OOE+01 4.80E+01 1.80E+02 SE 57 L13301-13 11/19/2007 1-131 2.OOE+00 8.10E+01 3.OOE+02 SE 57 L13301-13 11/19/2007 K-40 1.79E+04 9.30E+02 6.30E+02 SE 57 L13301-13 11/19/2007 La-140 1.17E+02 8.70E+01 2.90E+02 SE 57 L13301-13 11/19/2007 Mn-54 3.60E+0I 1.70E+0I 5.1OE+01 SE 57 L13301-13 11/19/2007 Nb-95 -1.10E+01 2.70E+0I 1.00E+02 SE 57 L13301-13 11/19/2007 Ru-103 7.OOE+00 1.90E+01 7.OOE+0l SE 57 L13301-13 11/19/2007 Ru- 106 1.80E+02 1.60E+02 5.30E+02 SE 57 L13301-13 11/19/2007 Sb-124 -1.50E+01 3.30E+01 1.60E+02 SE 57 L13301-13 11/19/2007 Sb-125 -3.80E+01 4.30E+01 1.70E+02 SE 57 L13301-13 11/19/2007 Se-75 -1.40E+01 1.90E+01 7.30E+01 SE 57 L13301-13 11/19/2007 Zn-65 -8.OOE+00 4.70E+01 1.80E+02 SE 57 L13301-13 11/19/2007 Zr-95 -2.OOE+01 3.1 OE+0 1 1.70E+02 SE 57 L13301-14 11/19/2007 AcTh-228 1.84E+02 6.50E+01 2.50E+02 SE 57 L13301-14 11/19/2007 Ag-108m -1.50E+01 1.1 OE+0 I 4.40E+0I SE 57 L13301-14 11/19/2007 Ag-li0m -2.OOE+01 1.40E+01 5.60E+01 SE 57 L13301-14 11/19/2007 Ba-140 4.OOE+01 1.50E+02 5.40E+02 SE 57 L13301-14 11/19/2007 Be-7 7.OOE+01 1.40E+02 5.10E+02 SE 57 L13301-14 11/19/2007 Ce-141 3.OOE+00 2.70E+01 9.40E+01 SE 57 L13301-14 11/19/2007 Ce-144 5.60E+01 7.90E+01 2.70E+02 SE 57 L13301-14 11/19/2007 Co-57 4.80E+00 9.60E+00 3.30E+-0I SE 57 L13301-14 11/19/2007 Co-58 -7.OOE+00 1.60E+01 6.10E+01 SE 57 L13301-14 11/19/2007 Co-60 1.00E+00 1.90E+01 7.OOE+01 SE 57 L13301-14 11/19/2007 Cr-51 -2.OOE+01 1.80E+02 6.50E+02 SE 57 L13301-14 11/19/2007 Cs-134 0.OOE+00 2.30E+01 8.1OE+01 SE 57 L13301-14 11/19/2007 Cs-137 3.40E+01 1.40E+01 4.1OE+0I SE 57 L13301-14 11/19/2007 Fe-59 1.40E+01 4.80E+01 1.70E+02 SE 57 L13301-14 11/19/2007 1-131 0.OOE+00 8.90E+01 3.20E+02 SE 57 L13301-14 11/19/2007 K-40 1.61E+04 7.40E+02 4.30E+02 SE 57 L13301-14 11/19/2007 La-140 -3.20E+01 7.30E+0I 8.50E+02 SE 57 L13301-14 11/19/2007 Mn-54 -8.OOE+00 1.50E+01 5.90E+01 SE 57 L13301-14 11/19/2007 Nb-95 9.OOE+00 2.40E+01 8.60E+01 SE 57 L13301-14 11/19/2007 Ru-103 7.OOE+00 1.80E+01 6.30E+01 SE 57 L13301-14 11/19/2007 Ru-106 -6.OOE+01 1.30E+02 4.90E+02 SE 57 L13301-14 11/19/2007 Sb-124 3.10E+01 1.80E+01 2.80E+01 SE 57 L13301-14 11/19/2007 Sb-125 1.80E+01 3.90E+01 1.40E+02 SE 57 L13301-14 11/19/2007 Se-75 3.OOE+00 1.70E+01 6.OOE+01 SE 57 L13301-14 11/19/2007 Zn-65 6.20E+0I 7.60E+01 2.60E+02 SE 57 L13301-14 11/19/2007 Zr-95 -2.OOE+00 2.60E+01 1.10E+02 SE 57 L13301-15 11/19/2007 AcTh-228 2.96E+02 7.30E+01 2.1OE+02 SE 57 L13301-15 11/19/2007 Ag-108m 1.30E+01 1.00E+01 3.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-148-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE 57 L13301-15 11/19/2007 Ag-110m -1.70E+01 1.30E+01 5.1OE+01 SE 57 L13301-15 11/19/2007 Ba-140 -6.OOE+01 1.50E+02 5.60E+02 SE 57 L13301-15 11/19/2007 Be-7 2.OOE+01 1.30E+02 4.60E+02 SE 57 L13301-15 11/19/2007 Ce-141 9.OOE+00 2.90E+01 1.00E+02 SE 57 L13301-15 11/19/2007 Ce-144 1.98E+02 8.30E+01 2.60E+02 SE 57 L13301-15 11/19/2007 Co-57 1.00E+00 1.10E+01 3.80E+01 SE 57 L13301-15 11/19/2007 Co-58 -5.OOE+00 1.90E+01 6.90E+01 SE 57 L13301-15 11/19/2007 Co-60 -8.OOE+00 1.40E+01 5.70E+01 SE 57 L13301-15 11/19/2007 Cr-51 -2.80E+02 1.80E+02 6.80E+02 SE 57 L13301-15 11/19/2007 Cs-134 1.80E+01 1.30E+01 4.50E+01 SE 57 L13301-15 11/19/2007 Cs-137 1.1 OE+0 1 1.40E+01 5.OOE+01 SE 57 L13301-15 11/19/2007 Fe-59 -2.20E+0 1 4.20E+01 1.60E+02 SE 57 L13301-15 11/19/2007 1-131 2.80E+01 7.40E+01 2.60E+02 SE 57 L13301-15 11/19/2007 K-40 1.53E+04 6.60E+02 5.90E+02 SE 57 L13301-15 11/19/2007 La-140 1.01E+02 7.70E+01 2.60E+02 SE 57 L13301-15 11/19/2007 Mn-54 -1.50E+01 1.40E+01 5.60E+01 SE 57 L13301-15 11/19/2007 Nb-95 -1.50E+01 2.1OE+01 8.1OE+01 SE 57 L13301-15 11/19/2007 Ru-103 9.OOE+00 2.1OE+01 7.30E+01 SE 57 L13301-15 11/19/2007 Ru-106 2.OOE+01 1.30E+02 4.80E+02 SE 57 L13301-15 11/19/2007 Sb- 124 -2.50E+01 2.20E+01 1.1OE+02 SE 57 L13301-15 11/19/2007 Sb-125 1.80E+01 3.40E+01 1.20E+02 SE 57 L13301-15 11/19/2007 Se-75 1.20E+01 1.80E+01 6.30E+01 SE 57 L13301-15 11/19/2007 Zn-65 -1.70E+01 3.30E+01 1.30E+02 SE 57 L13301-15 11/19/2007 Zr-95 2.1OE+01 2.40E+01 1.1OE+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-149-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF L12598-01 6/19/2007 AcTh-228 -2.70E+01 3.50E+01 1.50E+02 TF L12598-01 6/19/2007 Ag-108m 0.OOE+00 8.OOE+00 3.OOE+01 TF L12598-01 6/19/2007 Ag- l10m -3.OOE+00 1.40E+01 5.70E+01 TF L12598-01 6/19/2007 Ba-140 -1.00E+01 3.OOE+01 1.30E+02 TF L12598-01 6/19/2007 Be-7 -1.04E+02 9.20E+01 3.80E+02 TF L12598-01 6/19/2007 Ce- 141 -1.00E+00 1.90E+01 7.OOE+01 TF L12598-01 6/19/2007 Ce-144 4.60E+01 5.50E+01 1.90E+02 TF L12598-01 6/19/2007 Co-57 3.OOE+00 7.OOE+00 2.50E+01 TF L12598-01 6/19/2007 Co-58 -2.OOE+00 1.IOE+01 4.30E+01 TF L12598-01 6/19/2007 Co-60 -3.OOE+00 1.10E+01 4.60E+01 TF L12598-01 6/19/2007 Cr-51 4.OOE+01 1.30E+02 4.70E+02 TF L12598-01 6/19/2007 Cs-134 2.OOE+00 1.20E+01 4.40E+01 TF L12598-01 6/19/2007 Cs-137 -1.30E+00 8.40E+00 3.40E+01 TF L12598-01 6/19/2007 Fe-59 I.00E+00 2.60E+01 1.00E+02 TF L12598-01 6/19/2007 1-131 1.80E+01 5.20E+01 1.90E+02 TF L12598-01 6/19/2007 K-40 1.2 1E+03 2.20E+02 4.90E+02 TF L12598-01 6/19/2007 La- 140 -1.IOE+01 3.40E+01 1.50E+02 TF L12598-01 6/19/2007 Mn-54 6.OOE+00 1.20E+01 4.30E+01 TF L12598-01 6/19/2007 Nb-95 3.30E+01 1.50E+01 4.50E+01 TF L12598-01 6/19/2007 Ru-103 -2.70E+01 1.50E+01 6.30E+01 TF L12598-01 6/19/2007 Ru-106 -1.20E+02 1.00E+02 4.1OE+02 TF L12598-01 6/19/2007 Sb-124 2.70E+01 2.70E+01 9.70E+01 TF L12598-01 6/19/2007 Sb-125 0.OOE+00 2.30E+01 8.70E+01 TF L12598-01 6/19/2007 Se-75 -8.OOE+00 1.30E+01 5.OOE+01 TF L12598-01 6/19/2007 Zn-65 1.00E+00 2.OOE+01 8.OOE+01 TF L12598-01 6/19/2007 Zr-95 1.30E+01 2.OOE+01 7.30E+01 TF L12742-01 7/25/2007 AcTh-228 -4.OOE+01 3.40E+01 1.60E+02 TF L12742-01 7/25/2007 Ag-108m 6.30E+00 8.1OE+00 2.90E+01 TF L12742-01 7/25/2007 Ag-0mrn -1.00E+00 1.1 OE+01 4.70E+01 TF L12742-01 7/25/2007 Ba-140 -4.40E+01 2.30E+01 1.20E+02 TF L12742-01 7/25/2007 Be-7 1.80E+01 8.50E+01 3.20E+02 TF L12742-01 7/25/2007 Ce-141 -2.90E+01 1.30E+01 5.20E+01 TF L12742-01 7/25/2007 Ce-144 -4.OOE+00 4.OOE+01 1.50E+02 TF L12742-01 7/25/2007 Co-57 7.OOE-01 4.40E+00 1.60E+01 TF L12742-01 7/25/2007 Co-58 3.OOE+00 1.1OE+01 4.1OE+01 TF L12742-01 7/25/2007 Co-60 2.90E+00 9.20E+00 3.90E+01 TF L12742-01 7/25/2007 Cr-51 4.20E+01 8.20E+01 3.OOE+02 TF L12742-01 7/25/2007 Cs-134 1.20E+01 1.20E+01 4.20E+01 TF L12742-01 7/25/2007 Cs-137 2.OOE+00 1.20E+01 4.40E+01 TF L12742-01 7/25/2007 Fe-59 0.OOE+00 2.30E+01 9.40E+01 TF L12742-01 7/25/2007 1-131 9.OOE+00 2.1OE+01 8.1OE+01 TF L12742-01 7/25/2007 K-40 1.71E+03 3.OOE+02 5.90E+02 TF L12742-01 7/25/2007 La-140 -5.10E+01 2.70E+01 1.40E+02 TF L12742-01 7/25/2007 Mn-54 2.40E+01 1.20E+01 3.80E+01 TF L12742-01 7/25/2007 Nb-95 -1.40E+01 1.30E+01 5.70E+01 TF L12742-01 7/25/2007 Ru-103 2.OOE+00 1.20E+01 4.30E+01 TF L12742-01 7/25/2007 Ru-106 -1.03E+02 8.OOE+01 3.60E+02 TF L12742-01 7/25/2007 Sb-124 -2.30E+01 2.80E+01 1.40E+02 TF L12742-01 7/25/2007 Sb-125 1.90E+01 2.40E+01 8.40E+01 TF L12742-01 7/25/2007 Se-75 2.1OE+01 1.00E+01 3.20E+01 TF L12742-01 7/25/2007 Zn-65 -2.OOE+01 2.OOE+01 9.60E+0 1 TF L12742-01 7/25/2007 Zr-95 -9.OOE+00 1.60E+01 7.1OE+01 TF L12851-01 8/16/2007 AcTh-228 -5.40E+01 5.70E+01 2.40E+02 TF L12851-01 8/16/2007 Ag-108m 1.1OE+01 9.80E+00 3.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-150-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF L12851-01 8/16/2007 Ag-Il0m -4.OOE+00 1.60E+01 6.70E+01 TF L12851-01 8/16/2007 Ba-140 0.OOE+00 2.OOE+01 8.50E+01 TF L12851-01 8/16/2007 Be-7 1.16E+02 9.90E+01 3.40E+02 TF L12851-01 8/16/2007 Ce-141 -7.OOE+00 1.20E+01 4.70E+01 TF L12851-01 8/16/2007 Ce-144 -4.1OE+01 4.60E+01 1.80E+02 TF L12851-01 8/16/2007 Co-57 1.20E+00 6.50E+00 2.40E+01 TF L12851-01 8/16/2007 Co-58 1.70E+01 1.00E+01 3.20E+01 TF L12851-01 8/16/2007 Co-60 3.OOE+00 1.30E+01 5.30E+01 TF L12851-01 8/16/2007 Cr-51 5.70E+01 9.1OE+0I 3.30E+02 TF L12851-01 8/16/2007 Cs-134 9.OOE+00 1.20E+01 4.40E+01 TF L12851-01 8/16/2007 Cs-137 -1.15E+01 9.60E+00 4.50E+01 TF L12851-01 8/16/2007 Fe-59 -2.30E+01 2.50E+01 1.1OE+02 TF L12851-01 8/16/2007 1-131 7.OOE+00 1.70E+01 6.20E+01 TF L12851-01 8/16/2007 K-40 2.46E+03 3.80E+02 7.30E+02 TF L12851-01 8/16/2007 La- 140 0.OOE+00 2.30E+01 9.80E+0 1 TF L12851-01 8/16/2007 Mn-54 -1.20E+01 1.00E+01 4.70E+0 1 TF L12851-01 8/16/2007 Nb-95 6.OOE+00 1.1OE+0I 4.20E+01 TF L12851-01 8/16/2007 Ru-103 1.70E+01 1.10E+01 3.60E+01 TF L12851-01 8/16/2007 Ru- 106 1.70E+02 1.1OE+02 3.50E+02 TF L12851-01 8/16/2007 Sb-124 -3.70E+01 3.30E+01 1.60E+02 TF L12851-01 8/16/2007 Sb-125 -2.30E+01 2.90E+01 1.20E+02 TF L12851-01 8/16/2007 Se-75 1.50E+01 1.1OE+0 1 3.80E+01 TF L12851-01 8/16/2007 Zn-65 0.OOE+00 2.20E+01 9.40E+01 TF L12851-01 8/16/2007 Zr-95 5.OOE+00 1.90E+01 7.50E+01 TF L12598-02 6/19/2007 AcTh-228 -1.60E+01 3.70E+01 1.50E+02 TF L12598-02 6/19/2007 Ag-108m -3.60E+00 8.20E+00 3.20E+0 1 TF L12598-02 6/19/2007 Ag-I10m 0.OOE+00 1.30E+01 5.OOE+01 TF L12598-02 6/19/2007 Ba-140 -2.40E+01 2.80E+01 1.30E+02 TF L12598-02 6/19/2007 Be-7 9.30E+01 8.40E+01 2.90E+02 TF L12598-02 6/19/2007 Ce-141 0.OOE+00 1.90E+01 6.70E+01 TF L12598-02 6/19/2007 Ce-144 3.OOE+01 5.20E+01 1.80E+02 TF L12598-02 6/19/2007 Co-57 1.00E+01 6.80E+00 2.20E+01 TF L12598-02 6/19/2007 Co-58 0.OOE+00 8.90E+00 3.60E+01 TF L12598-02 6/19/2007 Co-60 2.80E+00 8.40E+00 3.40E+01 TF L12598-02 6/19/2007 Cr-51 3.1OE+02 1.30E+02 3.90E+02 TF L12598-02 6/19/2007 Cs-134 9.OOE+00 1.20E+01 4.1OE+01 TF L12598-02 6/19/2007 Cs-137 -3.70E+00 8.90E+00 3.60E+01 TF L12598-02 6/19/2007 Fe-59 -1.80E+01 2.40E+01 1.00E+02 TF L12598-02 6/19/2007 1-131 0.OOE+00 5.80E+01 2.1OE+02 TF L12598-02 6/19/2007 K-40 1.41E+03 2.30E+02 4.70E+02 TF L12598-02 6/19/2007 La-140 -2.70E+01 3.30E+01 1.50E+02 TF L12598-02 6/19/2007 Mn-54 -8.OOE+00 1.1 OE+0 1 4.50E+01 TF L12598-02 6/19/2007 Nb-95 -1.80E+01 1.30E+01 5.50E+01 TF L12598-02 6/19/2007 Ru-103 -1.00E+00 1.00E+01 4.10E+01 TF L12598-02 6/19/2007 Ru-106 1.67E+02 9.50E+01 3.OOE+02 TF L12598-02 6/19/2007 Sb-124 5.OOE+00 2.70E+01 1.1OE+02 TF L12598-02 6/19/2007 Sb-125 3.OOE+00 2.50E+01 9.20E+01 TF L12598-02 6/19/2007 Se-75 3.OOE+00 1.00E+01 3.70E+01 TF L12598-02 6/19/2007 Zn-65 8.OOE+00 2.70E+01 1.00E+02 TF L12598-02 6/19/2007 Zr-95 -4.OOE+00 2.OOE+01 7.80E+01 TF L12742-02 7/24/2007 AcTh-228 2.40E+01 4.1OE+01 1.50E+02 TF L12742-02 7/24/2007 Ag-108m 0.OOE+00 6.60E+00 2.50E+01 TF L12742-02 7/24/2007 Ag- ll0m -6.OOE+00 1.50E+01 6.1OE+01 TF L12742-02 7/24/2007 Ba-140 1.80E+01 2.20E+01 8.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-151-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF L12742-02 7/24/2007 Be-7 -1.28E+02 7.40E+01 3.20E+02 TF L12742-02 7/24/2007 Ce- 141 4.OOE+00 1:30E+01 4.70E+01 TF L12742-02 7/24/2007 Ce-144 5.20E+01 4.60E+01 1.60E+02 TF L12742-02 7/24/2007 Co-57 -2.60E+00 5.80E+00 2.1OE+01 TF L12742-02 7/24/2007 Co-58 2.OOE+00 1.00E+01 4.OOE+01 TF L12742-02 7/24/2007 Co-60 1.00E+00 I.1OE+01 4.30E+01 TF L12742-02 7/24/2007 Cr-51 -2.60E+01 8.40E+01 3.20E+02 TF L12742-02 7/24/2007 Cs-134 -1.1OE+01 1.00E+01 4.40E+01 TF L12742-02 7/24/2007 Cs-137 -9.60E+00 7.90E+00 3.50E+01 TF L12742-02 7/24/2007 Fe-59 -4.OOE+01 2.60E+01 1.20E+02 TF L12742-02 7/24/2007 1-131 -1.30E+01 2.90E+01 1.10E+02 TF L12742-02 7/24/2007 K-40 1.50E+03 2.50E+02 5.20E+02 TF L12742-02 7/24/2007 La- 140 2.OOE+01 2.60E+01 9.60E+01 TF L12742-02 7/24/2007 Mn-54 -3.1 OE+00 9.50E+00 3.80E+01 TF L12742-02 7/24/2007 Nb-95 2.50E+01 1.30E+01 3.90E+01 TF L12742-02 7/24/2007 Ru-103 -2.OOE+00 1.00E+01 3.80E+01 TF L12742-02 7/24/2007 Ru-106 1.60E+01 9.50E+01 3.50E+02 TF L12742-02 7/24/2007 Sb-124 -5.50E+01 2.90E+01 1.40E+02 TF L12742-02 7/24/2007 Sb-125 4.50E+01 2.40E+01 7.80E+01 TF L12742-02 7/24/2007 Se-75 -1.49E+01 8.70E+00 3.60E+01 TF L12742-02 7/24/2007 Zn-65 -5.90E+01 2.60E+01 1.20E+02 TF L12742-02 7/24/2007 Zr-95 8.OOE+00 1.60E+01 6.10E+01 TF L12851-02 8/16/2007 AcTh-228 6.20E+01 5.70E+01 2.OOE+02 TF L12851-02 8/16/2007 Ag-108m 3.40E+00 9.50E+00 3.50E+01 TF L12851-02 8/16/2007 Ag-110m 0.0OE+00 1.60E+01 6.50E+01 TF L12851-02 8/16/2007 Ba-140 -1.40E+01 1.70E+01 8.30E+01 TF L12851-02 8/16/2007 Be-7 -9.40E+01 9.OOE+01 3.80E+02 TF L12851-02 8/16/2007 Ce-141 2.50E+01 1.30E+01 4.30E+01 TF L12851-02 8/16/2007 Ce-144 7.OOE+00 5.90E+01 2.1OE+02 TF L12851-02 8/16/2007 Co-57 -3.40E+00 6.40E+00 2.40E+01 TF L12851-02 8/16/2007 Co-58 -9.60E+00 8.90E+00 4.30E+01 TF L12851-02 8/16/2007 Co-60 7.OOE+00 1.50E+01 5.70E+01 TF L12851-02 8/16/2007 Cr-51 -8.40E+01 9.50E+01 3.80E+02 TF L12851-02 8/16/2007 Cs-134 -6.OOE+00 1.20E+01 5.1 OE+0 I TF L12851-02 8/16/2007 Cs-137 -5.10E+00 9.20E+00 4.OOE+01 TF L12851-02 8/16/2007 Fe-59 -2.90E+01 2.30E+01 1.1 OE+02 TF L12851-02 8/16/2007 1-131 6.OOE+00 1.50E+01 5.60E+01 TF L12851-02 8/16/2007 K-40 1.92E+03 3.20E+02 5.40E+02 TF L12851-02 8/16/2007 La-140 -1.60E+01 1.90E+01 9.50E+01 TF L12851-02 8/16/2007 Mn-54 -3.30E+00 9.60E+00 4.10E+01 TF L12851-02 8/16/2007 Nb-95 1.50E+01 1.20E+01 4.10E+01 TF L12851-02 8/16/2007 Ru-103 -1.65E+01 8.50E+00 4.10E+01 TF L12851-02 8/16/2007 Ru-106 -1.79E+02 9.80E+01 4.50E+02 TF L12851-02 8/16/2007 Sb-124 2.40E+01 3.80E+01 1.40E+02 TF L12851-02 8/16/2007 Sb-125 3.90E+01 2.60E+01 8.40E+01 TF L12851-02 8/16/2007 Se-75 1.00E+00 1.20E+01 4.50E+01 TF L12851-02 8/16/2007 Zn-65 -8.OOE+00 2.70E+01 1.1OE+02 TF L12851-02 8/16/2007 Zr-95 2.50E+01 2.OOE+01 6.80E+01 TF L12598-03 6/19/2007 AcTh-228 3.30E+01 3.70E+01 1.30E+02 TF L12598-03 6/19/2007 Ag-108m -2.70E+00 6.60E+00 2.60E+01 TF L12598-03 6/19/2007 Ag-0mrn -1.20E+01 1.30E+01 5.80E+01 TF L12598-03 6/19/2007 Ba-140 -1.20E+01 2.60E+01 1.30E+02 TF L12598-03 6/19/2007 Be-7 -3.40E+01 7.50E+01 3.OOE+02 TF L12598-03 6/19/2007 Ce-141 -7.0OE+00 1.50E+01 5.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-152-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF L12598-03 6/19/2007 Ce-144 3.20E+01 3.30E+01 1.10E+02 TF L12598-03 6/19/2007 Co-57 4.50E+00 4.30E+00 1.50E+01 TF L12598-03 6/19/2007 Co-58 1.60E+01 1.20E+01 4.10E+01 TF L12598-03 6/19/2007 Co-60 -2.OOE+00 1.00E+01 4.30E+01 TF L12598-03 6/19/2007 Cr-51 2.70E+01 9.70E+01 3.60E+02 TF L12598-03 6/19/2007 Cs-134 1.00E+01 1.1OE+01 3.90E+0 1 TF L12598-03 6/19/2007 Cs-137 1.04E+01 9.OOE+00 3.1OE+0I TF L12598-03 6/19/2007 Fe-59 2.1OE+0I 2.1OE+01 7.40E+01 TF L12598-03 6/19/2007 1-131 -3.70E+01 4.60E+01 1.80E+02 TF L12598-03 6/19/2007 K-40 1.38E+03 2.50E+02 5.20E+02 TF L12598-03 6/19/2007 La-140 -1.30E+01 3.OOE+01 1.40E+02 TF L12598-03 6/19/2007 Mn-54 -8.OOE+00 1.00E+01 4.20E+01 TF L12598-03 6/19/2007 Nb-95 -1.80E+01 1.40E+01 6.OOE+01 TF L12598-03 6/19/2007 Ru-103 1.60E+01 1.1OE+01 3.80E+01 TF L12598-03 6/19/2007 Ru-106 0.OOE+00 7.50E+01 3.OOE+02 TF L12598-03 6/19/2007 Sb-124 -1.10E+01 2.80E+01 1.30E+02 TF L12598-03 6/19/2007 Sb-125 4.OOE+00 2.1OE+01 8.OOE+01 TF L12598-03 6/19/2007 Se-75 6.OOE+00 1.10E+01 3.80E+01 TF L12598-03 6/19/2007 Zn-65 -2.40E+0 1 1.90E+01 8.90E+01 TF L12598-03 6/19/2007 Zr-95 -4.OOE+00 1.60E+01 6.60E+01 TF L12742-03 7/24/2007 AcTh-228 1.20E+01 3.30E+01 1.20E+02 TF L12742-03 7/24/2007 Ag-108m 3.60E+00 7.OOE+00 2.50E+01 TF L12742-03 7/24/2007 Ag-110m 1.50E+01 1.20E+01 4.20E+01 TF L12742-03 7/24/2007 Ba-140 2.80E+01 2.50E+01 8.50E+01 TF L12742-03 7/24/2007 Be-7 4.1OE+0I 7.30E+01 2.60E+02 TF L12742-03 7/24/2007 Ce-141 -9.OOE+00 1.30E+01 4.70E+01 TF L12742-03 7/24/2007 Ce-144 -5.20E+0 1 3.40E+01 1.30E+02 TF L12742-03 7/24/2007 Co-57 7.70E+00 4.60E+00 1.50E+01 TF L12742-03 7/24/2007 Co-58 6.50E+00 9.30E+00 3.40E+01 TF L12742-03 7/24/2007 Co-60 4.OOE+00 1.1OE+01 4.1 OE+0 1 TF L12742-03 7/24/2007 Cr-51 -8.90E+01 8.1OE+01 3.20E+02 TF L12742-03 7/24/2007 Cs-134 -1.42E+01 8.80E+00 4.OOE+01 TF L12742-03 7/24/2007 Cs-137 9.1OE+00 9.50E+00 3.30E+01 TF L12742-03 7/24/2007 Fe-59 5.OOE+00 1.80E+01 7.20E+01 TF L12742-03 7/24/2007 1-131 -3.50E+01 2.40E+01 9.90E+01 TF L12742-03 7/24/2007 K-40 2.32E+03 2.90E+02 4.50E+02 TF L12742-03 7/24/2007 La-140 3.30E+01 2.80E+01 9.80E+01 TF L12742-03 7/24/2007 Mn-54 -3.OOE+00 9.1OE+00 3.60E+01 TF L12742-03 7/24/2007 Nb-95 -1.20E+01 1.30E+01 5.20E+01 TF L12742-03 7/24/2007 Ru-103 -7.OOE+00 1.10E+01 4.20E+01 TF L12742-03 7/24/2007 Ru-106 -4.60E+0 1 8.30E+01 3.30E+02 TF L12742-03 7/24/2007 Sb-124 0.OOE+00 2.20E+01 9.50E+01 TF L12742-03 7/24/2007 Sb-125 -2.50E+01 2.OOE+01 8.40E+01 TF L12742-03 7/24/2007 Se-75 5.30E+00 8.30E+00 2.90E+01 TF L12742-03 7/24/2007 Zn-65 3.10E+01 2.50E+01 8.50E+01 TF L12742-03 7/24/2007 Zr-95 2.70E+01 1.70E+0I 5.40E+0 1 TF L12851-03 8/16/2007 AcTh-228 1.30E+01 4.60E+0I 1.80E+02 TF L12851-03 8/16/2007 Ag- 108rm -1.80E+01 1.00E+01 4.50E+01 TF L12851-03 8/16/2007 Ag-110m -1.00E+01 1.70E+01 7.20E+01 TF L12851-03 8/16/2007 Ba-140 -9.OOE+00 1.30E+01 6.90E+01 TF L12851-03 8/16/2007 Be-7 7.OOE+01 1.IOE+02 3.90E+02 TF L12851-03 8/16/2007 Ce-141 1.50E+01 1.60E+01 5.60E+01 TF L12851-03 8/16/2007 Ce-144 -7.90E+0 1 5.60E+01 2.30E+02 TF L12851-03 8/16/2007 Co-57 7.50E+00 7.70E+00 2.70E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-153-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF 6 L12851-03 8/16/2007 Co-58 - 1.40E+01 1.30E+01 5.80E+01 TF 6 L12851-03 8/16/2007 Co-60 -9.30E+00 9.30E+00 5.OOE+01 TF 6 L12851-03 8/16/2007 Cr-51 3.OOE+01 1.00E+02 3.80E+02 TF 6 L12851-03 8/16/2007 Cs-134 1.50E+01 1.40E+01 4.90E+01 TF 6 L12851-03 8/16/2007 Cs-137 -4.OOE+00 1.30E+01 5.30E+01 TF 6 L12851-03 8/16/2007 Fe-59 1.30E+01 2.40E+01 9.20E+01 TF 6 L12851-03 8/16/2007 1-131 2.1OE+01 1.70E+01 5.80E+01 TF 6 L12851-03 8/16/2007 K-40 1.37E+03 2.90E+02 5.80E+02

TF 6 L12851-03 8/16/2007 La-140 -1.00E+01 1.50E+01 8.OOE+01 TF 6 L12851-03 8/16/2007 Mn-54 2.30E+01 1.00E+01 2.50E+01 TF 6 L12851-03 8/16/2007 Nb-95 1.40E+01 1.1OE+01 3.80E+01 TF 6 L12851-03 8/16/2007 Ru- 103 -1.1OE+00 8.OOE+00 3.40E+01 TF 6 L12851-03 8/16/2007 Ru-106 1.60E+02 1.20E+02 3.80E+02 TF 6 L12851-03 8/16/2007 Sb-124 2.20E+01 3.1OE+01 1.20E+02 TF 6 L12851-03 8/16/2007 Sb-125 2.0OE+00 3.50E+01 1.30E+02 TF 6 L12851-03 8/16/2007 Se-75 7.OOE+00 1.30E+01 4.70E+0 1 TF 6 L12851-03 8/16/2007 Zn-65 -1.30E+01 2.60E+01 1.20E+02 TF 6 L12851-03 8/16/2007 Zr-95 -4.20E+01 1.80E+01 9.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-154-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 9 L11940-01 1/17/2007 AcTh-228 -L.1OE+00 5.40E+00 1.90E+01 TM 9 L11940-01 1/17/2007 Ag-108m -1.00E+00 1.1OE+00 4.1OE+00 TM 9 L11940-01 1/17/2007 Ag-l0rn 2.30E+00 1.90E+00 6.20E+00 TM 9 L11940-01 1/17/2007 Ba-140 0.OOE+00 2.60E+00 9.40E+00 TM 9 L11940-01 1/17/2007 Be-7 4.OOE+00 1.1OE+01 4.OOE+01 TM 9 L11940-01 1/17/2007 Ce-141 -3.70E+00 1.90E+00 6.60E+00 TM 9 L11940-01 1/17/2007 Ce-144 1.24E+O1 6.OOE+00 2.OOE+01 TM 9 L11940-01 1/17/2007 Co-57 -7.30E-01 7.30E-01 2.60E+00 TM 9 L11940-01 1/17/2007 Co-58 -1.30E+00 1.70E+00 6.OOE+00 TM 9 Ll1940-01 1/17/2007 Co-60 1.20E+00 1.80E+00 6.30E+00 TM 9 L11940-01 1/17/2007 Cr-51 -9.OOE+00 1.1OE+01 3.90E+01 TM 9 L11940-01 1/17/2007 Cs-134 -8.OOE-01 1.60E+00 5.80E+00 TM 9 L11940-01 1/17/2007 Cs-137 2.30E+00 1.40E+00 4.50E+00 TM 9 L11940-01 1/17/2007 Fe-59 7.20E+00 3.50E+00 1.1OE+01 TM 9 L11940-01 1/17/2007 1-131 5.80E+00 2.30E+00 7.20E+00 TM 9 L11940-01 1/17/2007 1-131 -7.40E-02 1.30E-02 7.50E-01 TM 9 L11940-01 1/17/2007 K-40 1.34E+03 5.80E+01 7.60E+01 TM 9 L11940-01 1/17/2007 La-140 0.OOE+00 2.90E+00 1.1OE+01 TM 9 Ll1940-01 1/17/2007 Mn-54 -9.OOE-01 1.50E+00 5.60E+00 TM 9 L11940-01 1/17/2007 Nb-95 5.OOE-01 1.90E+00 6.50E+00 TM 9 L11940-01 1/17/2007 Ru-103 -1.30E+00 1.40E+00 5.1OE+00 TM 9 L11940-01 1/17/2007 Ru-106 1.50E+01 1.20E+01 3.90E+01 TM 9 L11940-01 1/17/2007 Sb-124 0.OOE+00 3.80E+00 1.40E+01 TM 9 L11940-01 1/17/2007 Sb-125 -1.30E+00 3.50E+00 1.20E+01 TM 9 L11940-01 1/17/2007 Se-75 -1.20E+00 1.60E+00 5.50E+00 TM 9 L11940-01 1/17/2007 Zn-65 -1.50E+00 3.80E+00 1.40E+01 TM 9 L11940-01 1/17/2007 Zr-95 2.OOE+00 2.70E+00 9.20E+00 TM 9 L12034-01 2/13/2007 AcTh-228 1.30E+00 6.60E+00 2.30E+01 TM 9 L12034-01 2/13/2007 Ag-108m -3.OOE-01 1.50E+00 5.50E+00 TM 9 L12034-01 2/13/2007 Ag-0mrn -1.1OE+00 2.30E+00 8.60E+00 TM 9 L12034-01 2/13/2007 Ba-140 LOOE-01 3.10E+00 1.20E+01 TM 9 L12034-01 2/13/2007 Be-7 8.OOE+00 1.40E+01 4.90E+01 TM 9 L12034-01 2/13/2007 Ce-141 -3.60E+00 2.70E+00 9.60E+00 TM 9 L12034-01 2/13/2007 Ce-144 -6.OOE+00 1.00E+01 3.60E+01 TM 9 L12034-01 2/13/2007 Co-57 -L.OOE-01 1.30E+00 4.40E+00 TM 9 L12034-01 2/13/2007 Co-58 2.30E+00 1.80E+00 6.10E+00 TM 9 L12034-01 2/13/2007 Co-60 5.80E+00 2.1OE+00 6.20E+00 TM 9 L12034-01 2/13/2007 Cr-51 1.00E+00 1.70E+01 5.90E+01 TM 9 L12034-01 2/13/2007 Cs-134 0.OOE+00 1.80E+00 6.60E+00 TM 9 L12034-01 2/13/2007 Cs-137 4.70E+00 1.70E+00 5.30E+00 TM 9 L12034-01 2/13/2007 Fe-59 8.1OE+00 4.60E+00 1.50E+01 TM 9 L12034-01 2/13/2007 1-131 -3.OOE-02 1.LOE-01 6.80E-01 TM 9 L12034-01 2/13/2007 1-131 -3.40E+00 3.80E+00 1.40E+01 TM 9 L12034-01 2/13/2007 K-40 1.25E+03 6.40E+01 9.OOE+01 TM 9 L12034-01 2/13/2007 La-140 2.OOE-01 3.60E+00 1.30E+01 TM 9 L12034-01 2/13/2007 Mn-54 -2.60E+00 1.80E+00 6.80E+00 TM 9 L12034-01 2/13/2007 Nb-95 -3.40E+00 2.10E+00 8.OOE+00 TM 9 L12034-01 2/13/2007 Ru-103 1.00E+00 1.80E+00 6.20E+00 TM 9 L12034-01 2/13/2007 Ru-106 5.OOE+00 1.50E+01 5.30E+01 TM 9 L12034-01 2/13/2007 Sb-124 2.40E+00 3.50E+00 1.30E+01 TM 9 L12034-01 2/13/2007 Sb-125 -6.80E+00 4.60E+00 1.70E+01 TM 9 L12034-01 2/13/2007 Se-75 -3.20E+00 1.90E+00 6.90E+00 TM 9 L12034-01 2/13/2007 Zn-65 -2.OOE+00 4.20E+00 1.50E+01 TM 9 L12034-01 2/13/2007 Zr-95 4.OOE+00 3.1OE+00 1.00E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-155-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12148-01 3/14/2007 AcTh-228 -1.00E+01 9.80E+00 4.OOE+0l TM L12148-01 3/14/2007 Ag-108m 6.40E+00 2.60E+00 8.1OE+00 TM L12148-01 3/14/2007 Ag-0mrn 3.30E+00 3.50E+00 1.20E+01 TM L12148-01 3/14/2007 Ba-140 7.OOE+00 2.70E+00 2.70E+00 TM L12148-01 3/14/2007 Be-7 4.70E+01 2.50E+01 8.10E+01 TM L12148-01 3/14/2007 Ce-141 -5.1 OE+00 4.30E+00 1.60E+I01 TM L12148-01 3/14/2007 Ce-144 5.OOE+00 1.40E+01 5.OOE+01 TM L12148-01 3/14/2007 Co-57 1.1OE+00 1.80E+00 6.40E+00 TM L12148-01 3/14/2007 Co-58 4.70E+00 2.80E+00 8.90E+00 TM L12148-01 3/14/2007 Co-60 3.60E+00 2.60E+00 8.80E+00 TM L12148-01 3/14/2007 Cr-51 -6.OOE+00 2.50E+01 9.10E+01 TM L12148-01 3/14/2007 Cs-134 -5.10E+00 2.50E+00 1.10E+01 TM L12148-01 3/14/2007 Cs-137 0.OOE+00 2.80E+00 1.00E+01 TM L12148-01 3/14/2007 Fe-59 -8.OOE-01 6.20E+00 2.40E+01 TM L12148-01 3/14/2007 1-131 -8.80E-02 1.60E-02 7.60E-0 I TM L12148-01 3/14/2007 1-131 -1.20E+00 4.80E+00 1.80E+01 TM L12148-01 3/14/2007 K-40 1.48E+03 1.00E+02 1.40E+02 TM L12148-01 3/14/2007 La-140 8.1OE+00 3.OOE+00 3.10E+00 TM L12148-01 3/14/2007 Mn-54 9.OOE-01 2.60E+00 9.40E+00 TM L12148-01 3/14/2007 Nb-95 3.OOE+00 3.20E+00 1.1OE+01 TM L12148-01 3/14/2007 Ru- 103 7.OOE+00 3.30E+00 1.00E+01 TM L12148-01 3/14/2007 Ru-106 1.30E+01 2.40E+01 8.60E+01 TM L12148-01 3/14/2007 Sb-124 1.70E+00 5.OOE+00 2.OOE+01 TM L12148-01 3/14/2007 Sb-125 0.OOE+00 5.40E+00 2.OOE+01 TM L12148-01 3/14/2007 Se-75 5.60E+00 3.60E+00 1.20E+01 TM L12148-01 3/14/2007 Zn-65 -1.iOE+01 7.60E+00 3.OOE+01 TM L12148-01 3/14/2007 Zr-95 1.60E+00 4.80E+00 1.70E+01 TM L12273-01 4/11/2007 AcTh-228 -1.66E+01 8.80E+00 3.70E+01 TM L12273-01 4/11/2007 Ag-108m -1.60E+00 1.90E+00 7.30E+00 TM L12273-01 4/11/2007 Ag-ill0m -3.60E+00 3.1OE+00 1.20E+01 TM L12273-01 4/11/2007 Ba-140 2.60E+00 3.90E+00 1.40E+01 TM L12273-01 4/11/2007 Be-7 5.OOE+00 2.20E+01 7.70E+01 TM L12273-01 4/11/2007 Ce-141 8.OOE-01 3.OOE+00 1.00E+01 TM L12273-01 4/11/2007 Ce-144 -8.OOE+00 1.20E+01 4.20E+01 TM L12273-01 4/11/2007 Co-57 3.50E+00 1.60E+00 5.20E+00 TM L12273-01 4/11/2007 Co-58 -2.10E+00 2.30E+00 9.OOE+00 TM L12273-01 4/11/2007 Co-60 -1.40E+00 2.90E+00 1.1 OE+0 1 TM L12273-01 4/11/2007 Cr-51 3.10E+01 1.80E+01 5.90E+01 TM L12273-01 4/11/2007 Cs-134 4.40E+00 2.50E+00 7.90E+00 TM L12273-01 4/11/2007 Cs-137 -1.50E+00 2.30E+00 9.OOE+00 TM L12273-01 4/11/2007 Fe-59 0.OOE+00 5.50E+00 2.OOE+01 TM L12273-01 4/11/2007 1-131 -7.OOE-02 1.30E-01 8.70E-0 1 TM L12273-01 4/11/2007 1-131 1.1OE+01 4.40E+00 1.40E+01 TM L12273-01 4/11/2007 K-40 1.34E+03 9.OOE+01 1.20E+02 TM L12273-01 4/11/2007 La-140 3.OOE+00 4.50E+00 1.60E+01 TM L12273-01 4/11/2007 Mn-54 -4.OOE-01 2.50E+00 9.20E+00 TM L12273-01 4/11/2007 Nb-95 -7.OOE-01 2.80E+00 1.00E+01 TM L12273-01 4/11/2007 Ru-103 6.OOE-01 2.50E+00 8.70E+00 TM L12273-01 4/11/2007 Ru-106 -2.OOE+00 2.60E+01 9.40E+01 TM L12273-01 4/11/2007 Sb-124 -5.70E+00 5.70E+00 2.50E+01 TM L12273-01 4/11/2007 Sb-125 -7.OOE-01 6.40E+00 2.30E+01 TM L12273-01 4/11/2007 Se-75 -5.OOE-01 2.70E+00 9.70E+00 TM L12273-01 4/11/2007 Zn-65 -6.30E+00 5.70E+00 2.30E+01 TM L12273-01 4/11/2007 Zr-95 -1.00E+00 3.50E+00 1.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-156-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12344-01 4/25/2007 AcTh-228 5.60E+00 9.30E+00 3.30E+I01 TM L12344-01 4/25/2007 Ag-108m -2.20E+00 2.OOE+00 7.40E+00 TM L12344-01 4/25/2007 Ag-il0mn 0.OOE+00 3.30E+00 1.20E+01 TM L12344-01 4/25/2007 Ba-140 1.50E+00 3.50E+00 1.30E+01 TM L12344-01 4/25/2007 Be-7 2.1OE+01 1.90E+01 6.30E+01 TM L12344-01 4/25/2007 Ce- 141 6.OOE-01 3.30E+00 1.20E+01 TM L12344-01 4/25/2007 Ce-144 2.OOE+00 1.30E+01 4.60E+01 TM L12344-01 4/25/2007 Co-57 -1.90E+00 1.60E+00 5.80E+00 TM L12344-01 4/25/2007 Co-58 -3.OOE-01 2.50E+00 9.20E+00 TM L12344-01 4/25/2007 Co-60 -2.80E+00 2.30E+00 9.70E+00 TM L12344-01 4/25/2007 Cr-51 -6.OOE+00 2.10E+01 7.60E+01 TM L12344-01 4/25/2007 Cs-134 1.90E+00 2.30E+00 8.1OE+00 TM L12344-01 4/25/2007 Cs-137 2. 1OE+00 2.30E+00 7.90E+00 TM L12344-01 4/25/2007 Fe-59 -4.50E+00 5.40E+00 2.1OE+01 TM L12344-01 4/25/2007 1-131 -3.90E+00 3.80E+00 1.5OE+01 TM L12344-01 4/25/2007 1-131 1.OOE-02 1.50E-01 8.50E-01 TM L12344-01 4/25/2007 K-40 1.28E+03 8.40E+01 1.20E+02 TM L12344-01 4/25/2007 La-140 1.70E+00 4. 1OE+00 1.50E+01 TM L12344-01 4/25/2007 Mn-54 0.OOE+00 2.50E+00 9.20E+00 TM L12344-01 4/25/2007 Nb-95 -3.OOE-01 2.80E+00 1.00E+01 TM L12344-01 4/25/2007 Ru-103 1.1OE+00 2.60E+00 9.OOE+00 TM L12344-01 4/25/2007 Ru-106 -2.50E+01 2.30E+01 8.70E+01 TM L12344-01 4/25/2007 Sb-124 1.63E+01 5.70E+00 1.50E+01 TM L12344-01 4/25/2007 Sb-125 -4.70E+00 6.OOE+00 2.20E+01 TM L12344-01 4/25/2007 Se-75 -1.70E+00 2.60E+00 9.60E+00 TM L12344-01 4/25/2007 Zn-65 -1.42E+01 6.60E+00 2.70E+01 TM L12344-01 4/25/2007 Zr-95 2.40E+00 3.80E+00 1.30E+01 TM L12403-01 5/9/2007 AcTh-228 1.73E+01 7.60E+00 2.90E+01 TM L12403-01 5/9/2007 Ag-108m 1.00E-01 1.50E+00 5.40E+00 TM L12403-01 5/9/2007 Ag-ll0m -2.30E+00 2.40E+00 9.40E+00 TM L12403-01 5/9/2007 Ba-140 -3.90E+00 3.1OE+00 1.30E+01 TM L12403-01 5/9/2007 Be-7 -I.50E+01 1.50E+01 5.60E+01 TM L12403-01 5/9/2007 Ce-141 -2.30E+00 2.60E+00 9.20E+00 TM L12403-01 5/9/2007 Ce-144 1.30E+01 1.00E+01 3.30E+01 TM L12403-01 5/9/2007 Co-57 -7.OOE-01 1.20E+00 4.20E+00 TM L12403-01 5/9/2007 Co-58 -1.50E+00 1.80E+00 6.80E+00 TM L12403-01 5/9/2007 Co-60 -2.1 OE+00 2.1OE+00 8.30E+00 TM L12403-01 5/9/2007 Cr-51 -1.90E+01 1.70E+01 6.1OE+01 TM L12403-01 5/9/2007 Cs-134 8.OOE-01 1.90E+00 6.80E+00 TM L12403-01 5/9/2007 Cs-137 -3.50E+00 2.30E+00 8.60E+00 TM L12403-01 5/9/2007 Fe-59 2.30E+00 4.40E+00 1.50E+01 TM L12403-01 5/9/2007 1-131 6.OOE-02 1.80E-01 9.70E-01 TM L12403-01 5/9/2007 1-131 6.OOE-01 3.60E+00 1.30E+01 TM L12403-01 5/9/2007 K-40 1.44E+03 7.60E+01 1.1OE+02 TM L12403-01 5/9/2007 La-140 -4.50E+00 3.50E+00 1.50E+01 TM L12403-01 5/9/2007 Mn-54 -2.50E+00 1.90E+00 7.50E+00 TM L12403-01 5/9/2007 Nb-95 1.60E+00 2.OOE+00 6.80E+00 TM L12403-01 5/9/2007 Ru- 103 -4.OOE-01 1.80E+00 6.60E+00 TM L12403-01 5/9/2007 Ru-106 3.1OE+01 1.80E+01 5.80E+01 TM L12403-01 5/9/2007 Sb-124 1.80E+00 5.20E+00 1.90E+01 TM L12403-01 5/9/2007 Sb-125 4.40E+00 5.OOE+00 1.70E+01 TM L12403-01 5/9/2007 Se-75 -1.80E+00 2.40E+00 8.40E+00 TM L12403-01 5/9/2007 Zn-65 -1.74E+01 5.OOE+00 2.10E+01 TM L12403-01 5/9/2007 Zr-95 -1.00E-01 2.90E+00 1.1OE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-157-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12468-01 5/23/2007 AcTh-228 -3.40E+00 4.80E+00 1.90E+01 TM L12468-01 5/23/2007 Ag-108m -1.20E+00 1.00E+00 3.80E+00 TM L12468-01 5/23/2007 Ag-110in -1.40E+00 1.80E+00 7.1OE+00 TM L12468-01 5/23/2007 Ba-140 2.40E+00 3.40E+00 1.20E+01 TM L12468-01 5/23/2007 Be-7 1.00E+00 1.20E+01 4.40E+01 TM L12468-01 5/23/2007 Ce-141 -4.OOE+00 2.40E+00 8.70E+00 TM L12468-01 5/23/2007 Ce-144 -7.40E+00 6.70E+00 2.40E+01 TM L12468-01 5/23/2007 Co-57 -3.30E-01 8.50E-01 3.OOE+00 TM L12468-01 5/23/2007 Co-58 -1.00E+00 1.50E+00 5.80E+00 TM L12468-01 5/23/2007 Co-60 -3.OOE-01 1.60E+00 6.1OE+00 TM L12468-01 5/23/2007 Cr-51 7.OOE+00 1.20E+01 4.1OE+01 TM L12468-01 5/23/2007 Cs-134 1.20E+00 1.70E+00 5.90E+00 TM L12468-01 5/23/2007 Cs-137 -1.20E+00 1.30E+00 4.90E+00 TM L12468-01 5/23/2007 Fe-59 -7.OOE+00 4.1OE+00 1.60E+01 TM L12468-01 5/23/2007 1-131 2.OOE+00 3.70E+00 1.30E+01 TM L12468-01 5/23/2007 1-131 1.90E-01 2.OOE-01 7.50E-01 TM L12468-01 5/23/2007 K-40 1.44E+03 6.40E+01 6.40E+01 TM L12468-01 5/23/2007 La-140 2.80E+00 3.90E+00 1.40E+01 TM L12468-01 5/23/2007 Mn-54 -1.10E+00 1.30E+00 5.1OE+00 TM L12468-01 5/23/2007 Nb-95 5.O0E-01 1.90E+00 6.80E+00 TM L12468-01 5/23/2007 Ru-103 0.OOE+00 1.60E+00 5.80E+00 TM L12468-01 5/23/2007 Ru-106 -9.OOE+00 1.20E+01 4.70E+01 TM L12468-01 5/23/2007 Sb-124 2.30E+00 3.40E+00 1.20E+01 TM L12468-01 5/23/2007 Sb-125 -5.OOE+00 3.50E+00 1.30E+01 TM L12468-01 5/23/2007 Se-75 6.OOE-01 1.50E+00 5.30E+00 TM L12468-01 5/23/2007 Zn-65 9.40E+00 3.90E+00 1.20E+01 TM L12468-01 5/23/2007 Zr-95 -2.OOE+00 2.80E+00 1.10E+01 TM L12520-01 6/6/2007 AcTh-228 -2.20E+00 8.90E+00 3.30E+01 TM L12520-01 6/6/2007 Ag-108m -1.00E+00 1.60E+00 6.20E+00 TM L12520-01 6/6/2007 Ag-li0m 0.OOE+00 3.OOE+00 1.1 OE+0 1 TM L12520-01 6/6/2007 Ba-140 -7.OOE-01 2.90E+00 1.1 OE+0 I TM L12520-01 6/6/2007 Be-7 -5.OOE+00 2.OOE+01 7.20E+01 TM L12520-01 6/6/2007 Ce-141 2.70E+00 3.40E+00 1.20E+01 TM L12520-01 6/6/2007 Ce-144 -9.OOE+00 1.00E+01 3.80E+01 TM L12520-01 6/6/2007 Co-57 4.OOE-01 1.50E+00 5.30E+00 TM L12520-01 6/6/2007 Co-58 -6.OOE-01 2.40E+00 8.80E+00 TM L12520-01 6/6/2007 Co-60 -1.80E+00 2.OOE+00 8.20E+00 TM L12520-01 6/6/2007 Cr-51 9.OOE+00 1.90E+01 6.60E+01 TM L12520-01 6/6/2007 Cs-134 -3.OOE-01 2.50E+00 9.10E+00 TM L12520-01 6/6/2007 Cs-137 4.OOE-01 2.20E+00 8.OOE+00 TM L12520-01 6/6/2007 Fe-59 1.30E+00 5.60E+00 2.OOE+01

,TM L12520-01 6/6/2007 1-131 -1.07E-01 1.70E-02 7.1OE-01 TM L12520-01 6/6/2007 1-131 -4.80E+00 4.1OE+00 1.50E+01 TM L12520-01 6/6/2007 K-40 1.35E+03 8.20E+01 1.30E+02 TM L12520-01 6/6/2007 La-140 -8.00E-0I 3.30E+00 1.30E+01 TM L12520-01 6/6/2007 Mn-54 -3.OOE+00 2.40E+00 9.40E+00 TM L12520-01 6/6/2007 Nb-95 -1.60E+00 2.50E+00 9.50E+00 TM L12520-01 6/6/2007 Ru-103 -I.90E+00 2.20E+00 8.40E+00 TM L12520-01 6/6/2007 Ru-106 -3.80E+01 2.OOE+01 8.1OE+01 TM L12520-01 6/6/2007 Sb-124 -3.30E+00 4.20E+00 1.80E+01 TM L12520-01 6/6/2007 Sb-125 -6.OOE-01 5.OOE+00 1.80E+01 TM L12520-01 6/6/2007 Se-75 9.OOE-01 2.70E+00 9.50E+00 TM L12520-01 6/6/2007 Zn-65 4.50E+00 5.60E+00 1.90E+01 TM L12520-01 6/6/2007 Zr-95 5.OOE-01 4.30E+00 1.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-158-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12580-01 6/20/2007 AcTh-228 1.OOE-01 9.OOE+00 3.30E+01 TM L12580-01 6/20/2007 Ag-108m -8.OOE-01 1.80E+00 6.50E+00 TM L12580-01 6/20/2007 Ag-li0m 3.OOE+00 2.90E+00 9.80E+00 TM L12580-01 6/20/2007 Ba-140 1.70E+00 3.70E+00 1.40E+01 TM L12580-01 6/20/2007 Be-7 2.60E+01 2.30E+OI 7.70E+01 TM L12580-01 6/20/2007 Ce-141 4.80E+00 3.80E+00 1.30E+01 TM L12580-01 6/20/2007 Ce-144 -1.70E+01 1.20E+01 4.40E+0 1 TM L12580-01 6/20/2007 Co-57 0.OOE+00 1.40E+00 5.OOE+00 TM L12580-01 6/20/2007 Co-58 7.OOE-01 2.20E+00 8.OOE+00 TM L12580-01 6/20/2007 Co-60 -1.60E+00 2.30E+00 9.20E+00 TM L12580-01 6/20/2007 Cr-51 -4.OOE+00 2.20E+01 8.OOE+01 TM L12580-01 6/20/2007 Cs-134 0.OOE+00 2.30E+00 8.50E+00 TM L12580-01 6/20/2007 Cs-137 1.50E+00 2.50E+00 8.70E+00 TM L12580-01 6/20/2007 Fe-59 4.60E+00 6.20E+00 2.1OE+01 TM L12580-01 6/20/2007 1-131 -1.36E-01 2.1OE-02 7.70E-01 TM L12580-01 6/20/2007 1-131 -2.50E+00 6.OOE+00 2.20E+01 TM L12580-01 6/20/2007 K-40 1.60E+03 8.60E+01 1.1OE+02 TM L12580-01 6/20/2007 La- 140 2.OOE+00 4.20E+00 1.60E+01 TM L12580-01 6/20/2007 Mn-54 1.80E+00 2.30E+00 7.80E+00 TM L12580-01 6/20/2007 Nb-95 -2.10E+00 2.70E+00 1.00E+01 TM L12580-01 6/20/2007 Ru- 103 1.1OE+00 2.60E+00 9. 1OE+00 TM L12580-01 6/20/2007 Ru- 106 -2.40E+01 2.1OE+01 8.1OE+OI TM L12580-01 6/20/2007 Sb- 124 -5.80E+00 5.50E+00 2.30E+01 TM L12580-01 6/20/2007 Sb-125 -3.1 OE+00 5.30E+00 2.OOE+01 TM L12580-01 6/20/2007 Se-75 2.80E+00 2.50E+00 8.40E+00 TM L12580-01 6/20/2007 Zn-65 -6.50E+00 5.OOE+00 2.OOE+01 TM L12580-01 6/20/2007 Zr-95 -1.10E+00 4.90E+00 1.80E+01 TM L12652-01 7/3/2007 AcTh-228 1.12E+OI 4.90E+00 1.60E+01 TM L12652-01 7/3/2007 Ag-108m 3.20E-01 9.OOE-01 3.1OE+00 TM L12652-01 7/3/2007 Ag-li0m 1.80E+00 1.80E+00 6.20E+00 TM L12652-01 7/3/2007 Ba-140 0.OOE+00 3.20E+00. 1.20E+01 TM L12652-01 7/3/2007 Be-7 7.OOE+00 1.00E+01 3.50E+01 TM L12652-01 7/3/2007 Ce- 141 3.70E+00 1.80E+00 5.90E+00 TM L12652-01 7/3/2007 Ce-144 -3.30E+00 5.60E+00 1.90E+01 TM L12652-01 7/3/2007 Co-57 -2.80E-01 7.10E-01 2.40E+00 TM L12652-01 7/3/2007 Co-58 9.OOE-01 1.30E+00 4.40E+00 TM L12652-01 7/3/2007 Co-60 0.OOE+00 1.50E+00 5.20E+00 TM L12652-01 7/3/2007 Cr-51 1.10E+01 1.20E+01 4.1OE+01 TM L12652-01 7/3/2007 Cs-134 9.OOE-01 1.30E+00 4.40E+00 TM L12652-01 7/3/2007 Cs-137 -1.90E+00 1.30E+00 4.60E+00 TM L12652-01 7/3/2007 Fe-59 -1.50E+00 3.30E+00 1.20E+01 TM L12652-01 7/3/2007 1-131 -6.60E+00 4.30E+00 1.50E+01 TM L12652-01 7/3/2007 1-131 2.30E-01 2.OOE-01 7.10E-01 TM L12652-01 7/3/2007 K-40 1.43E+03 4.90E+01 7.40E+OI TM L12652-01 7/3/2007 La-140 0.OOE+00 3.70E+00 1.30E+01 TM L12652-01 7/3/2007 Mn-54 7.OOE-01 1.20E+00 4.20E+00 TM L12652-01 7/3/2007 Nb-95 1.70E+00 1.50E+00 5.OOE+00 TM L12652-01 7/3/2007 Ru-103 -2.40E+00 1.30E+00 4.80E+00 TM L12652-01 7/3/2007 Ru-106 -1.30E+01 1.20E+01 4.1OE+OI TM L12652-01 7/3/2007 Sb-124 0.OOE+00 3.1 OE+00 1.1OE+OI TM L12652-01 7/3/2007 Sb-125 2.60E+00 2.90E+00 9.60E+00 TM L12652-01 7/3/2007 Se-75 -1.00E+00 1.30E+00 4.50E+00 TM L12652-01 7/3/2007 Zn-65 5.80E+00 3.1OE+00 1.00E+01 TM L12652-01 7/3/2007 Zr-95 7.OOE-01 2.40E+00 8.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-159-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12698-01 7/18/2007 AcTh-228 1.09E+01 6.30E+00 2.OOE+01 TM L12698-01 7/18/2007 Ag-108m -1.70E+00 1.60E+00 5.70E+00 TM L12698-01 7/18/2007 Ag-110m -6.20E+00 2.40E+00 9.80E+00 TM Ll2698-01 7/18/2007 Ba-140 1.10E+00 2.90E+00 1.1 OE+0 1 TM L12698-01 7/18/2007 Be-7 1.10E+01 1.60E+01 5.30E+01 TM L12698-01 7/18/2007 Ce-141 3.OOE-01 3.OOE+00 1.OOE+01 TM L12698-01 7/18/2007 Ce-144 9.40E+00 9. 1OE+00 3.OOE+01 TM L12698-01 7/18/2007 Co-57 1.00E+00 1.20E+00 3.90E+00 TM L12698-01 7/18/2007 Co-58 2.30E+00 1.80E+00 6.1OE+00 TM L12698-01 7/18/2007 Co-60 -3.1OE+00 1.80E+00 7.30E+00 TM L12698-01 7/18/2007 Cr-51 7.OOE+00 1.70E+01 5.90E+01 TM L12698-01 7/18/2007 Cs-134 4.OOE-01 1.70E+00 6.1OE+00 TM L12698-01 7/18/2007 Cs-137 8.OOE-01 1.90E+00 6.70E+00 TM L12698-01 7/18/2007 Fe-59 5.60E+00 4.40E+00 1.50E+01 TM L12698-01 7/18/2007 1-131 1.90E701 1.30E-01 3.90E-01 TM L12698-01 7/18/2007 1-131 4.00E-01 4.30E+00 1.50E+01 TM L12698-01 7/18/2007 K-40 1.46E+03 6.70E+01 8.70E+01 TM L12698-01 7/18/2007 La-140 1.20E+00 3.30E+00 1.20E+01 TM L12698-01 7/18/2007 Mn-54 2.OOE-01 1.80E+00 6.30E+00 TM L12698-01 7/18/2007 Nb-95 -2.90E+00 2.30E+00 8.70E+00 TM L12698-01 7/18/2007 Ru-103 -7.OOE+00 2.OOE+00 8.OOE+00 TM L12698-01 7/18/2007 Ru-106 3.90E+01 1.50E+01 4.80E+01 TM L12698-01 7/18/2007 Sb- 124 2.90E+00 3.60E+00 1.30E+01 TM L12698-01 7/18/2007 Sb-125 4.OOE-01 3.90E+00 1.40E+0I TM L12698-01 7/18/2007 Se-75 0.OOE+00 2.10E+00 7.40E+00 TM L12698-01 7/18/2007 Zn-65 -6.70E+00 4.30E+00 1.70E+01 TM L12698-01 7/18/2007 Zr-95 -3.30E+00 3.40E+00 1.30E+01 TM L12771-01 8/1/2007 AcTh-228 -7.90E+00 8.70E+00 3.30E+01 TM L12771-01 8/1/2007 Ag-108m 2.90E+00 1.70E+00 5.60E+00 TM L12771-01 8/1/2007 Ag-ll0m 5.20E+00 3.1OE+00 9.90E+00 TM L12771-01 8/1/2007 Ba-140 -5.30E+00 3.30E+00 1.40E+01 TM L12771-01 8/l/2007 Be-7 3.30E+01 2.OOE+01 6.70E+01 TM L12771-01 8/1/2007 Ce-141 -1.20E+00 3.40E+00 1.20E+01 TM L12771-01 8/1/2007 Ce-144 -8.OOE+00 1.1 OE+0 1 4.1OE+01 TM L12771-01 8/1/2007 Co-57 0.OOE+00 1.40E+00 5.OOE+00 TM L12771-01 8/1/2007 Co-58 -4.70E+00 2.30E+00 9.40E+00 TM L12771-01 8/1/2007 Co-60 -2.90E+00 2. 1OE+00 8.80E+00 TM L12771-01 8/1/2007 Cr-51 1.1OE+0I 1.90E+01 6.70E+01 TM L12771-01 8/1/2007 Cs-134 3.OOE-01 2.30E+00 8.40E+00 TM L12771-01 8/1/2007 Cs-137 -1.70E+00 2.10E+00 8.OOE+00 TM L12771-01 8/1/2007 Fe-59 3.70E+00 4.60E+00 1.60E+01 TM L12771-01 8/1/2007 1-131 -3.89E-02 8.60E-03 4.70E-0 1 TM L12771-01 8/1/2007 1-131 -3.70E+00 4.1OE+00 1.50E+01 TM L12771-01 8/1/2007 K-40 -3.05E+02 3.80E+01 2.40E+02 TM L12771-01 8/1/2007 La-140 -6.1 OE+00 3.70E+00 1.60E+01 TM L12771-01 8/1/2007 Mn-54 6.OOE-01 2.30E+00 8.30E+00 TM L12771-01 8/1/2007 Nb-95 1.30E+00 2.30E+00 8.1OE+00 TM L12771-01 8/1/2007 Ru-103 -1.20E+00 2.40E+00 8.80E+00 TM L12771-01 8/1/2007 Ru-106 2.60E+01 1.90E+01 6.40E+01 TM L12771-01 8/1/2007 Sb- 124 0.OOE+00 5.1OE+00 2.OOE+01 TM L12771-01 8/1/2007 Sb-125 3.80E+00 5.70E+00 2.OOE+01 TM L12771-01 8/1/2007 Se-75 5.OOE-01 2.50E+00 8.80E+00 TM L12771-01 8/1/2007 Zn-65 -4.30E+00 5.1OE+00 2.OOE+01 TM L12771-01 8/1/2007 Zr-95 -1.10E+00 4.10E+00 1.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-160-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12840-01 8/15/2007 AcTh-228 -1.00E+00 1.00E+01 3.70E+01 TM L12840-01 8/15/2007 Ag-108m 2.20E+00 1.90E+00 6.50E+00 TM L12840-01 8/15/2007 Ag-lil0m -5.OOE-01 3.OOE+00 1.10E+01 TM L12840-01 8/15/2007 Ba-140 -7.OOE-01 3.70E+00 1.40E+01 TM L12840-01 8/15/2007 Be-7 -2.10E+01 2.20E+01 8.20E+01 TM L12840-01 8/15/2007 Ce-141 -2.50E+00 3.40E+00 1.20E+01 TM L12840-01 8/15/2007 Ce-144 -1.00E+00 1.30E+01 4.70E+01 TM L12840-01 8/15/2007 Co-57 -1.40E+00 1.50E+00 5.40E+00 TM L12840-01 8/15/2007 Co-58 -4.50E+00 2.40E+00 1.00E+01 TM L12840-01 8/15/2007 Co-60 5.1OE+00 2.50E+00 7.60E+00 TM L12840-01 8/15/2007 Cr-51 3.30E+01 2.20E+01 7.1OE+01 TM L12840-01 8/15/2007 Cs-134 1.60E+00 2.30E+00 8.30E+00 TM L12840-01 8/15/2007 Cs-137 -7.OOE-01 2.50E+00 9.20E+00 TM L12840-01 8/15/2007 Fe-59 2.80E+00 5.30E+00 1.90E+01 TM L12840-01 8/15/2007 1-131 9.OOE-01 4.50E+00 1.60E+01 TM L12840-01 8/15/2007 1-131 6.50E-02 9.40E-02 4.OOE-01 TM L12840-01 8/15/2007 K-40 1.44E+03 9.1OE+01 1.20E+02 TM L12840-01 8/15/2007 La-140 -8.OOE-01 4.20E+00 1.70E+01 TM L12840-01 8/15/2007 Mn-54 4.OOE-01 2.40E+00 8.80E+00 TM L12840-01 8/15/2007 Nb-95 4.OOE-01 2.30E+00 8.50E+00 TM L12840-01 8/15/2007 Ru-103 -2.10E+00 2.40E+00 9. 1OE+00 TM L12840-01 8/15/2007 Ru-106 2.30E+01 2.1OE+01 7.OOE+01 TM L12840-01 8/15/2007 Sb-124 -7.OOE-01 4.50E+00 1.90E+01 TM L12840-01 8/15/2007 Sb-125 3.OOE+00 5.70E+00 2.OOE+01 TM L12840-01 8/15/2007 Se-75 -8.OOE-01 2.50E+00 8.90E+00 TM L12840-01 8/15/2007 Zn-65 5.60E+00 5.60E+00 1.90E+01 TM L12840-01 8/15/2007 Zr-95 3.90E+00 3.50E+00 1.20E+01 TM L12964-01 9/12/2007 AcTh-228 8.40E+00 9.30E+00 3.20E+01 TM L12964-01 9/12/2007 Ag-108m 2.1OE+00 1.50E+00 4.90E+00 TM L12964-01 9/12/2007 Ag-0mrn -2.10E+00 2.90E+00 1.1 OE+0 1 TM L12964-01 9/12/2007 Ba-140 -7.OOE-01 3.10E+00 1.20E+01 TM L12964-01 9/12/2007 Be-7 -1,1OE+01 1.70E+01 6.40E+01 TM L12964-01 9/12/2007 Ce-141 -4.OOE-01 2.70E+00 9.30E+00 TM L12964-01 9/12/2007 Ce-144 7.00E+00 1.00E+01 3.50E+0I TM L12964-01 9/12/2007 Co-57 -1.00E-01 1.20E+00 4.20E+00 TM L12964-01 9/12/2007 Co-58 -1.70E+00 1.70E+00 7.OOE+00 TM L12964-01 9/12/2007 Co-60 -2.70E+00 2.70E+00 1.10E+01 TM L12964-01 9/12/2007 Cr-51 0.OOE+00 1.60E+01 5.80E+01 TM L12964-01 9/12/2007 Cs-134 3.90E+00 2.40E+00 7.80E+00 TM L12964-01 9/12/2007 Cs-137 -1.20E+00 2. 1OE+00 7.90E+00 TM L12964-01 9/12/2007 Fe-59 4.30E+00 5.20E+00 1.80E+01 TM L12964-01 9/12/2007 1-131 4.20E-0 1 2.40E-01 6.1OE-01 TM L12964-01 9/12/2007 1-131 4.60E+00 3.40E+00 1.1 OE+0 I TM L12964-01 9/12/2007 K-40 1.34E+03 8.20E+01 1.1 OE+02 TM L12964-01 9/12/2007 La-140 -8.00E-01 3.50E+00 1.40E+01 TM L12964-01 9/12/2007 Mn-54 - 1.1OE+00 2.20E+00 8.40E+00 TM L12964-01 9/12/2007 Nb-95 -6.60E+00 2.10E+00 9.1OE+00 TM L12964-01 9/12/2007 Ru-103 1.60E+00 2. 1OE+00 7.1OE+00 TM L12964-01 9/12/2007 Ru-106 -1.80E+01 1.90E+01 7.1OE+01 TM L12964-01 9/12/2007 Sb-124 -1.05E+01 4.50E+00 2.20E+01 TM L12964-01 9/12/2007 Sb-125 -8.40E+00 4.60E+00 1.80E+01 TM L12964-01 9/12/2007 Se-75 -9.OOE-01 2.OOE+00 7.20E+00 TM L12964-01 9/12/2007 Zn-65 -3.60E+00 5.60E+00 2.10E+01 TM L12964-01 9/12/2007 Zr-95 1.1OE+00 3.90E+00 1.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-161-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L13019-01 9/26/2007 AcTh-228 3.OOE+00 7.80E+00 2.90E+0I TM L13019-01 9/26/2007 Ag-108m -2. 1OE+00 1.90E+00 7.20E+00 TM. L13019-01 9/26/2007 Ag-ll0m 5.OOE-01 3.50E+00 1.30E+01 TM L13019-01 9/26/2007 Ba-140 -1.40E+00 3.20E+00 1.30E+01 TM L13019-01 9/26/2007 Be-7 2.50E+01 1.90E+01 6.40E+01 TM L13019-01 9/26/2007 Ce- 141 -3.10E+00 3.50E+00 1.30E+01 TM L13019-01 9/26/2007 Ce-144 4.OOE+00 1.30E+0 1 4.40E+01 TM L13019-01 9/26/2007 Co-57 1.10E+00 1.70E+00 5.80E+00 TM L13019-01 9/26/2007 Co-58 1.90E+00 2.30E+00 8. 1OE+00 TM L 13019-01 9/26/2007 Co-60 3.1OE+00 2.90E+00 1.00E+01 TM L13019-01 9/26/2007 Cr-51 9.OOE+00 2.30E+01 7.90E+01 TM L13019-01 9/26/2007 Cs-134 -1.20E+00 2.50E+00 9.60E+00 TM L13019-01 9/26/2007 Cs-137 1.80E+00 2.40E+00 8.50E+00 TM L13019-01 9/26/2007 Fe-59 -1.23E+01 5.70E+00 2.40E+01 TM L13019-01 9/26/2007 1-131 2.70E+00 4.OOE+00 1.40E+01 TM L13019-01 9/26/2007 1-131 -7.20E-02 1.20E-02 5.60E-01 TM L13019-01 9/26/2007 K-40 1.44E+03 9.30E+0 1 1.30E+02 TM L13019-01 9/26/2007 La-140 -1.60E+00 3.70E+00 1.50E+01 TM L13019-01 9/26/2007 Mn-54 -7.OOE-01 1.90E+00 7.30E+00 TM L13019-01 9/26/2007 Nb-95 2.80E+00 2.70E+00 9.1OE+00

.TM L13019-01 9/26/2007 Ru- 103 -2.50E+00 2.10E+00 8.30E+00 TM L13019-01 9/26/2007 Ru-106 1.80E+01 2.30E+01 8.10E+01 TM L13019-01 9/26/2007 Sb-124 1.90E+00 5.40E+00 2.10E+01 TM L13019-01 9/26/2007 Sb- 125 -8.30E+00 6.70E+00 2.60E+01 TM L13019-01 9/26/2007 Se-75 -1.30E+00 2.60E+00 9.50E+00 TM L13019-01 9/26/2007 Zn-65 -6.OOE-01 5.OOE+00 1.90E+01 TM L13019-01 9/26/2007 Zr-95 -5.30E+00 4.30E+00 1.70E+01 TM L13158-01 10/24/2007 AcTh-228 4.90E+00 9.60E+00 3.40E+01 TM L13158-01 10/24/2007 Ag-108m -6.OOE-01 1.80E+00 6.60E+00 TM L13158-01 10/24/2007 Ag l.10m -4.OOE-01 3.OOE+00 1.1 OE+0 1 TM L13158-01 10/24/2007 Ba-140 -2.1 OE+00 3.20E+00 1.30E+01 TM L13158-01 10/24/2007 Be-7 -1.20E+01 2.OOE+01 7.30E+01 TM L13158-01 10/24/2007 Ce-141 -3.OOE-01 3.60E+00 1.20E+01 TM L13158-01 10/24/2007 Ce- 144 -2.60E+01 1.20E+01 4.40E+01 TM L13158-01 10/24/2007 Co-57 -1.10E+00 1.50E+00 5.50E+00 TM L13158-01 10/24/2007 Co-58 9.OOE-01 2.10E+00 7.60E+00 TM L13158-01 10/24/2007 Co-60 -4.OOE+00 2.10E+00 9.1OE+00 TM L13158-01 10/24/2007 Cr-51 1.90E+01 2.OOE+01 6.70E+0I TM L13158-01 10/24/2007 Cs-134 -3.OOE-01 2.40E+00 8.80E+00 TM L13158-01 10/24/2007 Cs-137 2.60E+00 2.30E+00 7.70E+00 TM L13158-01 10/24/2007 Fe-59 8.OOE+00 5.30E+00 1.70E+01 TM L13158-01 10/24/2007 1-131 -9.60E-02 1.50E-02 3.30E-01 TM L13158-01 10/24/2007 1-131 4.80E+00 3.70E+00 1.20E+01 TM L13158-01 10/24/2007 K-40 1.32E+03 7.90E+01 1.20E+02 TM L13158-01 10/24/2007 La-140 -2.1 OE+00 3.20E+00 1.30E+01 TM L13158-01 10/24/2007 Mn-54 -1.90E+00 1.90E+00 7.30E+00 TM L13158-01 10/24/2007 Nb-95 2.40E+00 2.40E+00 8.40E+00 TM L13158-01 10/24/2007 Ru-103 -4.OOE+00 2.60E+00 9.70E+00 TM L13158-01 10/24/2007 Ru-106 1.20E+01 2.OOE+01 7.OOE+01 TM L13158-01 10/24/2007 Sb-124 0.OOE+00 4.70E+00 1.80E+01 TM L13158-01 10/24/2007 Sb-125 -6.30E+00 6.OOE+00 2.20E+01 TM L13158-01 10/24/2007 Se-75 2.1OE+00 2.80E+00 9.40E+00 TM L13158-01 10/24/2007 Zn-65 1.1 4E+0 1 9.60E+00 3.20E+01 TM L13158-01 10/24/2007 Zr-95 -5.OOE-01 3.80E+00 1.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-162-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L13274-01 11/20/2007 AcTh-228 2.80E+00 9.20E+00 3.20E+01 TM L13274-01 11/20/2007 Ag- 108m 0.OOE+00 1.30E+00 4.70E+00 TM L13274-01 11/20/2007 Ag-110mi -2.1 OE+00 2.70E+00 1.00E+01 TM L13274-01 11/20/2007 Ba-140 -3.40E+00 2.80E+00 1.20E+01 TM L13274-01 11/20/2007 Be-7 -1.40E+01 1.50E+01 5.40E+01 TM L13274-01 11/20/2007 Ce-141 -3.OOE-01 4.10E+00 1.40E+01 TM L13274-01 11/20/2007 Ce-144 1.09E+01 9. 1OE+00 3.OOE+01 TM L13274-01 11/20/2007 Co-57 1.00E-01 1.20E+00 4.1OE+00 TM L13274-01 11/20/2007 Co-58 1.50E+00 1.90E+00 6.60E+00 TM L13274-01 11/20/2007 Co-60 -3.OOE+00 2.20E+00 8.80E+00 TM L13274-01 11/20/2007 Cr-51 2.OOE+01 1.70E+01 5.70E+01 TM L13274-01 11/20/2007 Cs-134 7.OOE-01 2.10E+00 7.40E+00 TM L13274-01 11/20/2007 Cs-137 -3.OOE-01 2.OOE+00 7.20E+00 TM L13274-01 11/20/2007 Fe-59 -2.40E+00 4.80E+00 1.80E+01 TM L13274-01 11/20/2007 1-131 1.40E+00 3.50E+00 1.20E+01 TM L13274-01 11/20/2007 1-131 4.50E-01 2.60E-01 7.20E-01 TM L13274-01 11/20/2007 K-40 1.46E+03 7.80E+01 1.00E+02 TM L13274-01 11/20/2007 La-140 -3.40E+00 2.80E+00 1.20E+01 TM L13274-01 11/20/2007 Mn-54 3.OOE-01 1.80E+00 6.50E+00 TM L13274-01 11/20/2007 Nb-95 -6.OOE-01 2.20E+00 7.90E+00 TM L13274-01 11/20/2007 Ru-103 -1.90E+00 1.80E+00 6.80E+00 TM L13274-01 11/20/2007 Ru-106 2.60E+01 1.70E+01 5.70E+01 TM L13274-01 11/20/2007 Sb-124 0.OOE+00 4.20E+00 1.60E+01 TM L13274-01 11/20/2007 Sb-125 -1.80E+00 4.60E+00 1.70E+01 TM L13274-01 11/20/2007 Se-75 -1.1OE+00 1.90E+00 6.70E+00 TM L13274-01 11/20/2007 Zn-65 -4.30E+00 5.10E+00 1.90E+01 TM L13274-01 11/20/2007 Zr-95 -7.30E+00 3.20E+00 1.30E+01 TM L13400-01 12/19/2007 AcTh-228 -6.OOE+00 7.20E+00 2.70E+01 TM L13400-01 12/19/2007 Ag-108m 1.60E+00 1.40E+00 4.60E+00 TM L13400-01 12/19/2007 Ag-110m -3.80E+00 2.60E+00 9.80E+00 TM L13400-01 12/19/2007 Ba-140 2.40E+00 3.40E+00 1.20E+01 TM L13400-01 12/19/2007 Be-7 8.OOE+00 1.50E+01 5.1OE+01 TM L13400-01 12/19/2007 Ce-141 2.80E+00 2.80E+00 9.30E+00 TM L13400-01 12/19/2007 Ce-144 -4.OOE+00 1.00E+01 3.50E+01 TM L13400-01 12/19/2007 Co-57 -6.OOE-01 1.20E+00 4.20E+00 TM L13400-01 12/19/2007 Co-58 1.40E+00 1.70E+00 5.90E+00 TM L13400-01 12/19/2007 Co-60 3.40E+00 1.70E+00 5.50E+00 TM L13400-01 12/19/2007 Cr-51 -3.40E+01 1.60E+01 6.I0E+01 TM L13400-01 12/19/2007 Cs-134 -4.OOE-01 1.90E+00 7.OOE+00 TM L13400-01 12/19/2007 Cs-137 -2.20E+00 1.70E+00 6.40E+00 TM L13400-01 12/19/2007 Fe-59 -2.70E+00 4.30E+00 1.60E+01 TM L13400-01 12/19/2007 1-131 2.10E-01 1.70E-01 5.80E-01 TM L13400-01 12/19/2007 1-131 4.OOE+00 4.10E+00 1.40E+01 TM L13400-01 12/19/2007 K-40 1.37E+03 6.50E+01 9.OOE+01 TM L13400-01 12/19/2007 La- 140 2.40E+00 3.40E+00 1.20E+01 TM L13400-01 12/19/2007 Mn-54 0.OOE+00 1.70E+00 5.90E+00 TM L13400-01 12/19/2007 Nb-95 1.1OE+00 2.50E+00 8.70E+00 TM L13400-01 12/19/2007 Ru-103 2.1OE+00 1.90E+00 6.50E+00 TM L13400-01 12/19/2007 Ru-106 -5.OOE+00 1.60E+01 5.70E+01 TM L13400-01 12/19/2007 Sb-124 0.OOE+00 4.OOE+00 1.50E+01 TM L13400-01 12/19/2007 Sb-125 2.20E+00 4.20E+00 1.40E+01 TM L13400-01 12/19/2007 Se-75 1.1OE+00 2.20E+00 7.50E+00 TM L13400-01 12/19/2007 Zn-65 -1.36E+01 4.90E+00 1.90E+01 TM L13400-01 12/19/2007 Zr-95 3.40E+00 3.40E+00 1.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-163-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM Li 1940-02 1/17/2007 AcTh-228 -1.00E+00 6.60E+00 2.30E+0I TM L11940-02 1/17/2007 Ag-108m -6.OOE-01 1.20E+00 4.30E+00 TM Li1940-02 1/17/2007 Ag-110m -2.90E+00 2.40E+00 8.70E+00 TM Ll 1940-02 1/17/2007 Ba-140 -3.90E+00 2.30E+00 9.60E+00 TM LI 1940-02 1/17/2007 Be-7 -4.OOE+00 1.20E+01 4.20E+0I TM Li 1940-02 1/17/2007 Ce-141 1.60E+00 1.90E+00 6.50E+00 TM Li 1940-02 1/17/2007 Ce-144 -9.30E+00 6.80E+00 2.40E+01 TM LI 1940-02 1/17/2007 Co-57 -7.40E-01 9.10E-01 3.10E+00 TM Li 1940-02 1/17/2007 Co-58 -1.10E+00 1.50E+00 5.50E+00 TM Li 1940-02 1/17/2007 Co-60 2.OOE-01 1.80E+00 6.60E+00 TM Li 1940-02 1/17/2007 Cr-51 1.50E+01 1.30E+01 4.30E+01 TM Li 1940-02 1/17/2007 Cs-134 -1.00E-01 1.60E+00 5.60E+00 TM Ll 1940-02 1/17/2007 Cs-137 2.30E+00 1.80E+00 6.1OE+00 TM Li 1940-02 1/17/2007 Fe-59 7.OOE-01 3.50E+00 1.20E+01 TM Li 1940-02 1/17/2007 1-131 1.60E-01 1.40E-01 4.90E-01 TM Li 1940-02 1/17/2007 1-131 1.90E+00 2.60E+00 8.70E+00 TM Li 1940-02 1/17/2007 K-40 1.41E+03 6.OOE+01 8.60E+01 TM Ll 1940-02 1/17/2007 La-140 -4.50E+00 2.70E+00 1.1 OE+0 1 TM Li 1940-02 1/17/2007 Mn-54 1.30E+00 1.40E+00 4.70E+00 TM Li 1940-02 1/17/2007 Nb-95 2.1OE+00 1.60E+00 5.50E+00 TM Li 1940-02 1/17/2007 Ru-103 1.30E+00 1.40E+00 4.70E+00 TM Li 1940-02 1/17/2007 Ru- 106 5.OOE+00 1.40E+01 4.80E+01 TM Li 1940-02 1/17/2007 Sb-124 3.50E+00 3.40E+00 1.20E+01 TM Li 1940-02 1/17/2007 Sb-125 -1.80E+00 3.70E+00 1.30E+01 TM Li 1940-02 1/17/2007 Se-75 1.60E+00 1.40E+00 4.80E+00 TM Li 1940-02 1/17/2007 Zn-65 0.OOE+00 4.10E+00 1.40E+01 TM LI 1940-02 1/17/2007 Zr-95 2.OOE-01 2.60E+00 9.1OE+00 TM L12034-02 2/13/2007 AcTh-228 4.90E+00 7.90E+00 2.70E+01 TM L12034-02, 2/13/2007 Ag-108m 8.OOE-01 1.40E+00 4.80E+00 TM L12034-02 2/13/2007 Ag-i 10m -1.10E+00 2.80E+00 1.00E+01 TM L12034-02 2/13/2007 Ba-140 6.OOE-01 3.70E+00 1.40E+01 TM L12034-02 2/13/2007 Be-7 -3.OOE+00 1.50E+01 5.40E+0 1 TM L12034-02 2/13/2007 Ce-141 -4.40E+00 2.70E+00 9.80E+00 TM L12034-02 2/13/2007 Ce-144 -4.OOE-01 9.60E+00 3.30E+01 TM L12034-02 2/13/2007 Co-57 -1.70E+00 1.30E+00 4.50E+00 TM L12034-02 2/13/2007 Co-58 -1.80E+00 1.90E+00 7.40E+00 TM L12034-02 2/13/2007 Co-60 -2.80E+00 2.40E+00 9.60E+00 TM L12034-02 2/13/2007 Cr-51 6.OOE+00 1.70E+01 6.1OE+01 TM L12034-02 2/13/2007 Cs-134 3.OOE-01 2.OOE+00 7.1OE+00 TM L12034-02 2/13/2007 Cs-137 -4.OOE-01 2.1OE+00 7.70E+00 TM L12034-02 2/13/2007 Fe-59 2.50E+00 5.40E+00 1.90E+01 TM L12034-02 2/13/2007 1-131 2.1OE+00 4.1OE+00 1.40E+01 TM L12034-02 2/13/2007 1-131 -1.OOE-02 1.40E-01 8.60E-01 TM L12034-02 2/13/2007 K-40 1.38E+03 7.70E+01 1.1OE+02 TM L12034-02 2/13/2007 La- 140 7.OOE-0 l 4.30E+00 1.60E+01 TM L12034-02 2/13/2007 Mn-54 -1.20E+00 2.OOE+00 7.50E+00 TM L12034-02 2/13/2007 Nb-95 -7.OOE-01 2.20E+00 8.30E+00 TM L12034-02 2/13/2007 Ru-103 -4.50E+00 1.90E+00 7.70E+00 TM L12034-02 2/13/2007 Ru-106 1.30E+01 2.OOE+01 6.80E+01 TM L12034-02 2/13/2007 Sb-124 -2.OOE+00 4.80E+00 1.90E+01 TM L12034-02 2/13/2007 Sb-125 9.80E+00 4.80E+00 1.50E+01 TM L12034-02 2/13/2007 Se-75 7.00E-01 2.40E+00 8.10E+00 TM L12034-02 2/13/2007 Zn-65 -7.40E+00 5.20E+00 2.OOE+01 TM L12034-02 2/13/2007 Zr-95 2.70E+00 3.80E+00 1.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-164-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12148-02 3/14/2007 AcTh-228 3.60E+00 6.OOE+00 2.1OE+01 TM L12148-02 3/14/2007 Ag-108m -1.50E+00 1.30E+00 4.90E+00 TM L12148-02 3/14/2007 Ag-il0mn -1.00E+00 2.30E+00 8.30E+00 TM L12148-02 3/14/2007 Ba-140 -2.80E+00 2.90E+00 1.20E+01 TM L12148-02 3/14/2007 Be-7 -1.20E+01 1.40E+01 5.OOE+01 TM L12148-02 3/14/2007 Ce-141 -5.OOE-01 2.OOE+00 7.OOE+00 TM L12148-02 3/14/2007 Ce-144 3.OOE-01 8.80E+00 3.OOE+01 TM L12148-02 3/14/2007 Co-57 3.OOE-01 1.10OE+00 3.80E+00 TM L12148-02 3/14/2007 Co-58 -1.60E+00 1.70E+00 6.30E+00 TM L12148-02 3/14/2007 Co-60 2.OOE-01 1.50E+00 5.60E+00 TM L12148-02 3/14/2007 Cr-51 -1.70E+01 1.60E+01 5.60E+01 TM L12148-02 3/14/2007 Cs-134 -2.40E+00 1.70E+00 6.50E+00 TM L12148-02 3/14/2007 Cs-137 9.OOE-01 1.60E+00 5.40E+00 TM L12148-02 3/14/2007 Fe-59 1.1IE+01 4.30E+00 1.30E+01 TM L12148-02 3/14/2007 1-131 -7.1 OE-02 1.30E-02 6.OOE-01 TM L12148-02 3/14/2007 1-131 6. I OE+00 4.OOE+00 1.30E+01 TM L12148-02 3/14/2007 K-40 1.45E+03 6.20E+01 7.60E+01

TM L12148-02 3/14/2007 La-140 -3.20E+00 3.40E+00 1.30E+01 TM L12148-02 3/14/2007 Mn-54 0.OOE+00 1.70E+00 6.OOE+00 TM L12148-02 3/14/2007 Nb-95 -2.50E+00 2.OOE+00 7.50E+00 TM L12148-02 3/14/2007 Ru-103 -1.10E+00 1.90E+00 6.70E+00 TM L12148-02 3/14/2007 Ru-106 -1.1OE+01 1.40E+01 5.20E+01 TM L12148-02 3/14/2007 Sb- 124 -3.30E+00 3.OOE+00 1.30E+01 TM L12148-02 3/14/2007 Sb-125 -5.70E+00 4.1OE+00 1.50E+01 TM L12148-02 3/14/2007 Se-75 2.70E+00 2.OOE+00 6.50E+00 TM L12148-02 3/14/2007 Zn-65 2.20E+00 4.40E+00 1.50E+01 TM L12148-02 3/14/2007 Zr-95 -1.90E+00 2.90E+00 1.10E+01 TM L12273-02 4/11/2007 AcTh-228 -2.50E+00 8.40E+00 3.20E+01 TM L12273-02 4/11/2007 Ag- 108rm -1.00E+00 1.70E+00 6.20E+00 TM L12273-02 4/11/2007 Ag-0mrn -2. 1OE+00 3.OOE+00 1.20E+01 TM L12273-02 4/11/2007 Ba-140 3.30E+00 3.80E+00 1.40E+01 TM L12273-02 4/11/2007 Be-7 6.OOE+00 1.70E+01 5.90E+01 TM L12273-02 4/11/2007 Ce-141 -5.60E+00 2.80E+00 1.00E+01 TM L12273-02 4/11/2007 Ce-144 -7.80E+00 8.80E+00 3.20E+01 TM L12273-02 4/11/2007 Co-57 1.30E+00 1.1OE+00 3.80E+00 TM L12273-02 4/11/2007 Co-58 -1.40E+00 2.20E+00 8.60E+00 TM L12273-02 4/11/2007 Co-60 -5.70E+00 3.OOE+00 1.30E+01 TM L12273-02 4/11/2007 Cr-51 2.80E+01 1.60E+01 5.40E+0 1 TM L12273-02 4/11/2007 Cs-134 4.70E+00 2.40E+00 7.50E+00 TM L12273-02 4/11/2007 Cs-137 -9.OOE-01 2.1OE+00 8.OOE+00 TM L12273-02 4/11/2007 Fe-59 -4.90E+00 5.80E+00 2.20E+0 1 TM L12273-02 4/11/2007 1-131 2.20E-0 1 2.20E-01 8.20E-01 TM L12273-02 4/11/2007 1-131 -I.00E-01 3.20E+00 1.20E+01 TM L12273-02 4/11/2007 K-40 1.40E+03 8.90E+01 1.20E+02 TM L12273-02 4/11/2007 La-140 3.70E+00 4.40E+00 1.60E+01 TM L12273-02 4/11/2007 Mn-54 -4.OOE-01 2.60E+00 9.40E+00 TM L12273-02 4/11/2007 Nb-95 -1.50E+00 2.40E+00 9.10E+00 TM L12273-02 4/11/2007 Ru-103 -2.10E+00 2.10E+00 8.1OE+00 TM L12273-02 4/11/2007 Ru-106 1.50E+01 2.OOE+01 6.80E+01 TM L12273-02 4/11/2007 Sb- 124 -5.40E+00 5.1OE+00 2.30E+01 TM L12273-02 4/11/2007 Sb-125 6.OOE-01 5.50E+00 1.90E+01 TM L12273-02 4/11/2007 Se-75 -2.60E+00 2. 1OE+00 8.OOE+00 TM L12273-02 4/11/2007 Zn-65 1.70E+00 6. 1OE+00 2.20E+01 TM L12273-02 4/11/2007 Zr-95 -3.20E+00 4.OOE+00 1.50E+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-165-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12344-02 4/25/2007 AcTh-228 1.00E+00 1.00E+01 3.80E+01 TM L12344-02 4/25/2007 Ag-108m 3.80E+00 2.OOE+00 6.50E+00 TM L12344-02 4/25/2007 Ag-1rnm -4.70E+00 3.30E+00 1.40E+01 TM L12344-02 4/25/2007 Ba-140 -1.90E+00 3.20E+00 1.40E+01 TM L12344-02 4/25/2007 Be-7 1.1OE+0 I 1.90E+01 6.70E+01 TM L12344-02 4/25/2007 Ce-141 1.20E+00 3.40E+00 1.20E+01 TM L12344-02 4/25/2007 Ce-144 -1.50E+01 1.40E+01 5.10E+01 TM L12344-02 4/25/2007 Co-57 -1.60E+00 1.80E+00 6.60E+00 TM L12344-02 4/25/2007 Co-58 -1.30E+00 2.50E+00 9.60E+00 TM L12344-02 4/25/2007 Co-60 -1.70E+00 3.OOE+00 1.20E+01 TM L12344-02 4/25/2007 Cr-51 7.OOE+00 2.20E+O1 7.70E+0 I TM L12344-02 4/25/2007 Cs-134 5.OOE-01 2.60E+00 9.70E+00 TM L12344-02 4/25/2007 Cs-137 -1.20E+00 2.70E+00 1.00E+01 TM L12344-02 4/25/2007 Fe-59 1.12E+01 6.60E+00 2.20E+01 TM L12344-02 4/25/2007 1-131 1.50E-01 2.OOE-01 8.30E-01 TM L12344-02 4/25/2007 1-131 -5.30E+00 4.40E+00 1.70E+01 TM L12344-02 4/25/2007 K-40 1.53E+03 1.00E+02 1.30E+02 TM L12344-02 4/25/2007 La-140 -2.1OE+00 3.70E+00 1.60E+01 TM L12344-02 4/25/2007 Mn-54 -4.OOE-01 2.80E+00 1.00E+01 TM L12344-02 4/25/2007 Nb-95 -5.80E+00 3.40E+00 1.40E+01 TM L12344-02 4/25/2007 Ru-103 3.20E+00 2.90E+00 9.80E+00 TM L12344-02 4/25/2007 Ru-106 1.30E+01 2.30E+01 8.30E+O1 TM L12344-02 4/25/2007 Sb-124 -4.60E+00 5.1OE+00 2.30E+OI TM L12344-02 4/25/2007 Sb-125 5.OOE+00 6.40E+00 2.20E+01 TM L12344-02 4/25/2007 Se-75 -2.40E+00 3.1OE+00 1.10E+01 TM L12344-02 4/25/2007 Zn-65 -I.02E+01 7.1OE+00 2.80E+01 TM L12344-02 4/25/2007 Zr-95 -9.60E+00 4.40E+00 1.90E+01 TM L12403-02 5/9/2007 AcTh-228 -6.OOE+00 1.00E+01 3.90E+01 TM L12403-02 5/9/2007 Ag-108m -4.OOE+00 2.OOE+00 8.OOE+00 TM L12403-02 5/9/2007 Ag-110m 6.OOE-01 3.60E+00 1.30E+01 TM L12403-02 5/9/2007 Ba-140 1.70E+00 3.OOE+00 1.1OE+0 I TM L12403-02 5/9/2007 Be-7 -2.40E+01 2.20E+01 8.40E+01 TM L12403-02 5/9/2007 Ce-141 -1.50E+00 4.40E+00 1.60E+01 TM L12403-02 5/9/2007 Ce-144 -1.00E+00 1.40E+OI 5.10E+01 TM L12403-02 5/9/2007 Co-57 -3.30E+00 1.90E+00 6.90E+00 TM L12403-02 5/9/2007 Co-58 8.OOE-01 2.60E+00 9.30E+00 TM L12403-02 5/9/2007 Co-60 -I.10E+00 2.90E+00 1.1OE+OI TM L12403-02 5/9/2007 Cr-51 1.40E+01 2.30E+01 7.90E+01 TM L12403-02 5/9/2007 Cs-134 4.70E+00 2.70E+00 8.70E+00 TM L12403-02 5/9/2007 Cs-137 -1.60E+00 2.50E+00 9.70E+00 TM L12403-02 5/9/2007 Fe-59 5.80E+00 7. 1OE+00 2.50E+01 TM L12403-02 5/9/2007 1-131 7.OOE-02 1.60E-01 8.10E-01 TM L12403-02 5/9/2007 1-131 -1.60E+00 4.80E+00 1.80E+01 TM L12403-02 5/9/2007 K-40 1.46E+03 9.50E+OI 1.40E+02 TM L12403-02 5/9/2007 La-140 2.OOE+00 3.40E+00 1.30E+01 TM L12403-02 5/9/2007 Mn-54 -1.90E+00 2.70E+00 1.00E+01 TM L12403-02 5/9/2007 Nb-95 6.30E+00 3.20E+00 1.00E+01 TM L12403-02 5/9/2007 Ru-103 -3.70E+00 3.OOE+00 1.20E+01 TM L12403-02 5/9/2007 Ru-106 -2.OOE+00 2.40E+01 8.70E+OI TM L12403-02 5/9/2007 Sb-124 4.20E+00 5.1OE+00 1.80E+01 TM L12403-02 5/9/2007 Sb-125 -3.20E+00 6.50E+00 2.40E+0 1 TM L12403-02 5/9/2007 Se-75 5.OOE+00 3.30E+00 1.1OE+OI TM L12403-02 5/9/2007 Zn-65 7.20E+00 8.OOE+00 2.70E+01 TM L12403-02 5/9/2007 Zr-95 3.50E+00 5.1OE+00 1.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-166-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12468-02 5/23/2007 AcTh-228 1.58E+01 6.60E+00 2.1OE+01 TM L12468-02 5/23/2007 Ag-108m 2.OOE-01 1.10E+00 4.OOE+00 TM L12468-02 5/23/2007 Ag-l0rn 3.00E-01 2.30E+00 8.10E+00 TM L12468-02 5/23/2007 Ba-140 2.40E+00 3.40E+00 1.20E+01 TM L12468-02 5/23/2007 Be-7 7.OOE+00 1.30E+01 4.40E+01 TM L12468-02 5/23/2007 Ce-141 -2.10E+00 2.60E+00 9.1OE+00 TM L12468-02 5/23/2007 Ce-144 -8.20E+00 8.20E+00 2.90E+01 TM L12468-02 5/23/2007 Co-57 -7.OOE-01 1.1OE+00 3.70E+00 TM L12468-02 5/23/2007 Co-58 -8.OOE-01 1.40E+00 5.40E+00 TM L12468-02 5/23/2007 Co-60 -9.OOE-01 1.70E+00 6.60E+00 TM L12468-02 5/23/2007 Cr-51 0.OOE+00 1.60E+01 5.50E+01 TM L12468-02 5/23/2007 Cs-134 5.OOE-01 1.60E+00 5.80E+00 TM L12468-02 5/23/2007 Cs-137 -6.OOE-01 1.60E+00 5.80E+00 TM L12468-02 5/23/2007 Fe-59 -2.OOE+00 3.90E+00 1.50E+01 TM L12468-02 5/23/2007 1-131 -8.OOE-02 I.00E-0I 7.20E-01 TM L12468-02 5/23/2007 1-131 1.50E+00 4.50E+00 1.60E+01 TM L12468-02 5/23/2007 K-40 1.42E+03 6.50E+01 7.50E+OI TM L12468-02 5/23/2007 La- 140 2.70E+00 4.OOE+00 1.40E+01 TM L12468-02 5/23/2007 Mn-54 -6.OOE-01 1.40E+00 5.20E+00 TM L12468-02 5/23/2007 Nb-95 -1.50E+00 1.90E+00 7.OOE+00 TM L12468-02 5/23/2007 Ru-103 -4.20E+00 1.80E+00 6.90E+00 TM L12468-02 5/23/2007 Ru-106 2.20E+OI 1.40E+01 4.60E+01 TM L12468-02 5/23/2007 Sb-124 0.OOE+00 3.20E+00 1.30E+01 TM L12468-02 5/23/2007 Sb-125 2.90E+00 3.80E+00 1.30E+01 TM L12468-02 5/23/2007 Se-75 2.OOE-01 1.60E+00 5.70E+00 TM L12468-02 5/23/2007 Zn-65 7.30E+00 7.10E+00 2.40E+01 TM L12468-02 5/23/2007 Zr-95 1.40E+00 2.90E+00 1.00E+01 TM L12520-02 6/6/2007 AcTh-228 1.44E+01 9.90E+00 3.30E+01 TM L12520-02 6/6/2007 Ag-108m 8.OOE-01 1.80E+00 6.30E+00 TM L12520-02 6/6/2007 Ag-110m -4.40E+00 3.60E+00 1.40E+01 TM L12520-02 6/6/2007 Ba-140 -2.90E+00 3.30E+00 1.40E+01 TM L12520-02 6/6/2007 Be-7 -1.00E+01 1.70E+01 6.30E+01 TM. L12520-02 6/6/2007 Ce-141 -1.00E+00 2.90E+00 1.00E+01 TM L12520-02 6/6/2007 Ce-144 -5.OOE+00 1.1OE+01 3.90E+01 TM L12520-02 6/6/2007 Co-57 6.OOE-01 1.30E+00 4.60E+00 TM L12520-02 6/6/2007 Co-58 3.OOE-01 2.20E+00 8.1OE+00 TM L12520-02 6/6/2007 Co-60 1.80E+00 3.1OE+00 1.1OE+OI TM L12520-02 6/6/2007 Cr-51 1.70E+01 1.70E+01 5.70E+01 TM L12520-02 6/6/2007 Cs-134 -1.00E-01 2.80E+00 1.00E+01 TM L12520-02 6/6/2007 Cs-137 0.OOE+00 2.30E+00 8.30E+00 TM L12520-02 6/6/2007 Fe-59 -8.OOE-01 6. 1OE+00 2.70E+01 TM L12520-02 6/6/2007 1-131 4.40E+00 3.40E+00 1.1 OE+0 1 TM L12520-02 6/6/2007 1-131 1.OOE-02 1.20E-01 6.70E-0 1 TM L12520-02 6/6/2007 K-40 1.63E+03 9.80E+01 1.60E+02 TM L12520-02 6/6/2007 La- 140 -3.30E+00 3.80E+00 1.60E+01 TM L12520-02 6/6/2007 Mn-54 -2.30E+00 2.40E+00 9.20E+00 TM L12520-02 6/6/2007 Nb-95 -3.70E+00 3.OOE+00 1.1OE+01 TM L12520-02 6/6/2007 Ru-103 1.50E+00 2.30E+00 8.10E+00 TM L12520-02 6/6/2007 Ru-106 1.20E+01 2. 1OE+OI 7.20E+01 TM L12520-02 6/6/2007 Sb- 124 -6.50E+00 5.90E+00 2.50E+01 TM L12520-02 6/6/2007 Sb-125 -8.70E+00 5.40E+00 2.1OE+0I TM L12520-02 6/6/2007 Se-75 1.00E+00 2.50E+00 8.60E+00 TM L12520-02 6/6/2007 Zn-65 -1.05E+01 5.70E+00 2.30E+01 TM L12520-02 6/6/2007 Zr-95 -3.OOE+00 4.30E+00 1.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-167-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12580-02 6/20/2007 AcTh-228 6.20E+00 8.60E+00 3.OOE+01 TM L12580-02 6/20/2007 Ag-108m 1.30E+00 1.90E+00 6.50E+00 TM L12580-02 6/20/2007 Ag-Il0m -4.OOE-01 2.80E+00 1.10E+01 TM L12580-02 6/20/2007 Ba-140 -1.70E+00 3.70E+00 1.50E+01 TM L12580-02 6/20/2007 Be-7 -1.40E+01 1.70E+01 6.40E+01 TM L12580-02 6/20/2007 Ce-141 1.50E+00 3.40E+00 1.20E+01 TM L12580-02 6/20/2007 Ce-144 -1.80E+01 1.10E+01 4.10E+01 TM L12580-02 6/20/2007 Co-57 -1.00E-01 1.40E+00 5.OOE+00 TM L12580-02 6/20/2007 Co-58 3.00E-01 2.40E+00 8.60E+00 TM L12580-02 6/20/2007 Co-60 2.70E+00 2.20E+00 7.40E+00 TM L12580-02 6/20/2007 Cr-51 -2.40E+0 1 2.0OE+01 7.40E+01 TM L12580-02 6/20/2007 Cs-134 2.50E+00 2.40E+00 8. 1OE+00 TM L12580-02 6/20/2007 Cs-137 4.60E+00 2.30E+00 7.20E+00 TM L12580-02 6/20/2007 Fe-59 -2.70E+00 6.OOE+00 2.20E+01 TM L12580-02 6/20/2007 1-131 -1.70E+00 5.70E+00 2.1OE+01 TM L12580-02 6/20/2007 1-131 1.00E-01 1.50E-01 6.30E-01 TM L12580-02 6/20/2007 K-40 1.57E+03 8.40E+01 1.1 OE+02 TM L12580-02 6/20/2007 La-140 -1.90E+00 4.20E+00 1.70E+01 TM L12580-02 6/20/2007 Mn-54 2.20E+00 2.20E+00 7.50E+00 TM L12580-02 6/20/2007 Nb-95 2.60E+00 2.70E+00 9.20E+00 TM L12580-02 6/20/2007 Ru-103 -1.30E+00 2.40E+00 8.90E+00 TM L12580-02 6/20/2007 Ru-106 1.10E+0I 2.OOE+01 7.1OE+01 TM L12580-02 6/20/2007 Sb-124 -7.70E+00 3.70E+00 1.80E+01 TM L12580-02 6/20/2007 Sb-125 -5.70E+00 4.90E+00 1.90E+01 TM L12580-02 6/20/2007 Se-75 -3.40E+00 2.50E+00 9.30E+00 TM L12580-02 6/20/2007 Zn-65 -2.20E+00 5.20E+00 2.OOE+01 TM L12580-02 6/20/2007 Zr-95 -5.OOE-01 3.90E+00 1.40E+01 TM L12652-02 7/3/2007 AcTh-228 1.50E+00 6.30E+00 2.20E+0 1 TM L12652-02 7/3/2007 Ag-108m -1.50E+00 1.1OE+00 3.80E+00 TM L12652-02 7/3/2007 Ag-0mrn -1.00E+00 1.90E+00 6.80E+00 TM L12652-02 7/3/2007 Ba-140 -5.50E+00 3.OOE+00 1.20E+01 TM L12652-02 7/3/2007 Be-7 -1.00E+00 1.20E+01 4.OOE+01 TM L12652-02 7/3/2007 Ce-141 2.80E+00 2.OOE+00 6.50E+00 TM L12652-02 7/3/2007 Ce-144 -8.OOE+00 6.50E+00 2.30E+01 TM L12652-02 7/3/2007 Co-57 6.OOE-02 8.20E-01 2.80E+00 TM L12652-02 7/3/2007 Co-58 2.OOE-01 1.70E+00 5.80E+00 TM L12652-02 7/3/2007 Co-60 2.40E+00 1.70E+00 5.60E+00 TM L12652-02 7/3/2007 Cr-51 1.60E+01 1.20E+01 4.OOE+01 TM L12652-02 7/3/2007 Cs-134 -8.OOE-01 1.50E+00 5.20E+00 TM L12652-02 7/3/2007 Cs-137 1.90E+00 1.40E+00 4.60E+00 TM L12652-02 7/3/2007 Fe-59 1.80E+00 3.80E+00 1.30E+01 TM L12652-02 7/3/2007 1-131 1.OOE-01 1.40E-01 6.OOE-01 TM L12652-02 7/3/2007 1-131 -4.20E+00 4.OOE+00 1.40E+01 TM L12652-02 7/3/2007 K-40 1.54E+03 5.50E+01 8.50E+01 TM L12652-02 7/3/2007 La-140 -6.30E+00 3.40E+00 1.40E+01 TM L12652-02 7/3/2007 Mn-54 6.OOE-01 1.40E+00 5.OOE+00 TM L12652-02 7/3/2007 Nb-95 -1.40E+00 1.90E+00 6.80E+00 TM L12652-02 7/3/2007 Ru- 103 -1.30E+00 1.50E+00 5.30E+00 TM L12652-02 7/3/2007 Ru-106 1.1 OE+0 1 1.1OE+01 3.80E+01 TM L12652-02 7/3/2007 Sb-124 2.40E+00 3.70E+00 1.80E+01 TM L12652-02 7/3/2007 Sb-125 -4.OOE-01 3.40E+00 1.20E+01 TM L12652-02 7/3/2007 Se-75 1.20E+00 1.40E+00 4.60E+00 TM L12652-02 7/3/2007 Zn-65 3.OOE+00 3.40E+00 1.20E+01 TM L12652-02 7/3/2007 Zr-95 -1.80E+00 2.80E+00 9.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-168-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12698-02 7/18/2007 AcTh-228 6.OOE+00 7.70E+00 2.70E+01 TM L12698-02 7/18/2007 Ag-108m 1.40E+00 1.50E+00 5.OOE+00 TM L12698-02 7/18/2007 Ag-110m -1.30E+00 2.70E+00 9.90E+00 TM L12698-02 7/18/2007 Ba-140 -6.00E-01 2.80E+00 1.1 OE+0 1 TM L12698-02 7/18/2007 Be-7 -5.OOE+00 1.50E+01 5.30E+01 TM L12698-02 7/18/2007 Ce-141 2.60E+00 3.OOE+00 1.00E+01 TM L12698-02 7/18/2007 Ce- 144 -9.OOE-01 9.50E+00 3.30E+01 TM L12698-02 7/18/2007 Co-57 -9.OOE-01 1.30E+00 4.70E+00 TM L12698-02 7/18/2007 Co-58 -2.1 OE+00 2.1OE+00 7.90E+00 TM L12698-02 7/18/2007 Co-60 -2.70E+00 2.OOE+00 8.1OE+00 TM L12698-02 7/18/2007 Cr-51 -1.00E+01 1.70E+01 6.20E+01 TM L12698-02 7/18/2007 Cs-134 -2.90E+00 2.20E+00 8.30E+00 TM L12698-02 7/18/2007 Cs-137 9.OOE-01 1.80E+00 6.30E+00 TM L12698-02 7/18/2007 Fe-59 1.00E+00 4.40E+00 1.60E+01 TM L12698-02 7/18/2007 1-131 3.60E+00 4.70E+00 1.60E+01 TM L12698-02 7/18/2007 1-131 -3.70E-02 7.70E-02 5.1 OE-0 1 TM L12698-02 7/18/2007 K-40 1.56E+03 7.40E+01 1.00E+02 TM L12698-02 7/18/2007 La-140 -7.OOE-01 3.20E+00 1.30E+01 TM L12698-02 7/18/2007 Mn-54 1.90E+00 2.OOE+00 6.90E+00 TM L12698-02 7/18/2007 Nb-95 3.80E+00 2.40E+00 7.80E+00 TM L12698-02 7/18/2007 Ru-103 -2.OOE+00 2.30E+00 8.30E+00 TM L12698-02 7/18/2007 Ru-106 1.60E+01 1.80E+01 6.30E+01 TM L12698-02 7/18/2007 Sb-124 -8.OOE-01 4.10E+00 1.60E+01 TM L12698-02 7/18/2007 Sb-125 -3. 1OE+00 4.40E+00 1.60E+01 TM L12698-02 7/18/2007 Se-75 3.20E+00 2. 10E+00 6.90E+00 TM L12698-02 7/18/2007 Zn-65 3.20E+00 4.90E+00 1.70E+01 TM L12698-02 7/18/2007 Zr-95 1.01E+01 3.40E+00 1.00E+01 TM L12771-02 8/1/2007 AcTh-228 -1.00E+00 1.00E+01 3.90E+01 TM L12771-02 8/1/2007 Ag-108m 2.80E+00 1.90E+00 6.20E+00 TM L12771-02 8/1/2007 Ag-1 1Oim 2.60E+00 3.50E+00 1.30E+01 TM L12771-02 8/1/2007 Ba-140 0.OOE+00 3.30E+00 1.40E+01 TM L12771-02 8/1/2007 Be-7 -1.90E+01 1.80E+01 7.OOE+01 TM L12771-02 8/1/2007 Ce-141 -6.1 OE+00 3.20E+00 1.20E+01 TM L12771-02 8/1/2007 Ce-144 -7.80E+00 9.90E+00 3.60E+01 TM L12771-02 8/1/2007 Co-57 2.30E+00 1.50E+00 4.80E+00 TM L12771-02 8/1/2007 Co-58 3.40E+00 2.80E+00 9.40E+00 TM L12771-02 8/1/2007 Co-60 3.OOE-01 3.40E+00 1.30E+01 TM L12771-02 8/1/2007 Cr-51 1.40E+01 1.90E+01 6.50E+01 TM L12771-02 8/1/2007 Cs-134 -1.40E+00 2.40E+00 9.70E+00 TM L12771-02 8/1/2007 Cs-137 -2.OOE+00 2.20E+00 8.80E+00 TM L12771-02 8/1/2007 Fe-59 3.20E+00 6.60E+00 2.40E+01 TM L12771-02 8/1/2007 1-131 -7.OOE+00 3.60E+00 1.50E+01 TM L12771-02 8/1/2007 1-131 2.10E-01 2.OOE-01 6.80E-0 1 TM L12771-02 8/1/2007 K-40. 1.59E+03 1.1 OE+02 1.60E+02

TM L12771-02 8/1/2007 La-140 0.OOE+00 3.80E+00 1.60E+01 TM L12771-02 8/1/2007 Mn-54 8.OOE-01 2.50E+00 9.OOE+00 TM L12771-02 8/1/2007 Nb-95 3.60E+00 3.30E+00 1.1 OE+0 1 TM L12771-02 8/1/2007 Ru-103 -3.70E+00 2.60E+00 1.00E+01 TM L12771-02 8/1/2007 Ru-106 1.00E+01 1.90E+01 6.90E+01 TM L12771-02 8/1/2007 Sb-124 3.50E+00 4.30E+00 1.60E+01 TM L12771-02 8/1/2007 Sb-125 1.39E+01 6.1OE+00 1.90E+01 TM L12771-02 8/1/2007 Se-75 -1.40E+00 2.40E+00 8.70E+00 TM L12771-02 8/1/2007 Zn-65 1.29E+01 5.50E+00 1.60E+01 TM L12771-02 8/1/2007 Zr-95 -2.OOE+00 4.60E+00 1.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-169-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L12840-02 8/15/2007 AcTh-228 -2.30E+00 8.40E+00 3.1 OE+0 1 TM L12840-02 8/15/2007 Ag-108m -1.40E+00 1.90E+00 6.90E+00 TM L12840-02 8/15/2007 Ag-il0m 0.OOE+00 3.10E+00 1.10E+01 TM L12840-02 8/15/2007 Ba-140 -5.20E+00 3. 1OE+00 1.30E+01 TM L12840-02 8/15/2007 Be-7 -2.40E+01 1.60E+01 6.20E+01 TM L12840-02 8/15/2007 Ce-141 -8.OOE-01 3.OOE+00 1.10E+01 TM L12840-02 8/15/2007 Ce-144 -2.OOE+00 1.1OE+0 1 4.OOE+01 TM L12840-02 8/15/2007 Co-57 -2. 1OE+00 1.60E+00 5.80E+00 TM L12840-02 8/15/2007 Co-58 0.OOE+00 2.OOE+00 7.30E+00 TM L12840-02 8/15/2007 Co-60 1.10E+00 2.20E+00 8.OOE+00 TM L12840-02 8/15/2007 Cr-51 1.60E+01 1.90E+01 6.40E+01 TM L12840-02 8/15/2007 Cs-134 -3.90E+00 2.20E+00 8.90E+00 TM L12840-02 8/15/2007 Cs-137 -3.60E+00 2.20E+00 8.50E+00 TM L12840-02 8/15/2007 Fe-59 -9.OOE-01 4.30E+00 1.60E+01 TM L12840-02 8/15/2007 1-131 4.40E-02 9.20E-02 4.20E-01 TM L12840-02 8/15/2007 1-131 1.00E+00 3.70E+00 1.30E+01 TM L12840-02 8/15/2007 K-40 1.62E+03 8.30E+01 9.80E+01 TM L12840-02 8/15/2007 La-140 -5.90E+00 3.60E+00 1.50E+01 TM L12840-02 8/15/2007 Mn-54 -2.40E+00 2.30E+00 8.70E+00 TM L12840-02 8/15/2007 Nb-95 3.OOE-01 2.40E+00 8.50E+00 TM L12840-02 8/15/2007 Ru-103 9.OOE-01 2.1OE+00 7.20E+00 TM L12840-02 8/15/2007 Ru-106 -2.60E+01 2.1OE+01 8.OOE+01 TM L12840-02 8/15/2007 Sb-124 3.OOE-01 4.1OE+00 1.60E+01 TM L12840-02 8/15/2007 Sb-125 3.40E+00 5.20E+00 1.80E+01 TM L12840-02 8/15/2007 Se-75 -6.OOE-01 2.30E+00 8.20E+00 TM L12840-02 8/15/2007 Zn-65 -1.10E+01 5.60E+00 2.20E+01 TM L12840-02 8/15/2007 Zr-95 4.30E+00 3.70E+00 1.20E+01 TM L12964-02 9/12/2007 AcTh-228 -1.38E+01 6.70E+00 2.60E+01 TM L12964-02 9/12/2007 Ag-108m -3.OOE-01 1.40E+00 5.OOE+00 TM L12964-02 9/12/2007 Ag-it0m -3.00E-01 2.20E+00 8.OOE+00 TM L12964-02 9/12/2007 Ba-140 -3.OOE-01 3.50E+00 1.30E+01 TM L12964-02 9/12/2007 Be-7 -1.00E+01 1.5OE+01 5.40E+01 TM L12964-02 9/12/2007 Ce-141 -1.00E+00 2.90E+00 1.00E+01 TM L12964-02 9/12/2007 Ce-144 -1.20E+01 9.40E+00 3.40E+0 1 TM L12964-02 9/12/2007 Co-57 1.70E+00 1.30E+00 4.30E+00 TM L12964-02 9/12/2007 Co-58 0.OOE+00 1.70E+00 6.30E+00 TM L12964-02 9/12/2007 Co-60 4.80E+00 2.OOE+00 6.30E+00 TM L12964-02 9/12/2007 Cr-51 1.00E+00 1.90E+01 6.50E+01 TM L12964-02 9/12/2007 Cs-134 0.OOE+00 1.80E+00 6.50E+00 TM L12964-02 9/12/2007 Cs-137 6.OOE+00 2.30E+00 7.30E+00 TM L12964-02 9/12/2007 Fe-59 4.80E+00 3.90E+00 1.30E+01 TM L12964-02 9/12/2007 1-131 I.1OE-01 1.50E-01 6.30E-01 TM L12964-02 9/12/2007 1-131 3.1OE+00 5.OOE+00 1.70E+01 TM L12964-02 9/12/2007 K-40 1.57E+03 7.OOE+01 9.20E+01 TM L12964-02 9/12/2007 La-140 -3.OOE-01 4.OOE+00 1.50E+01 TM L12964-02 9/12/2007 Mn-54 2.90E+00 1.80E+00 5.90E+00 TM L12964-02 9/12/2007 Nb-95 -I.60E+00 2.OOE+00 7.60E+00 TM L12964-02 9/12/2007 Ru-103 -4.00E-01 1.90E+00 6.90E+00 TM L12964-02 9/12/2007 Ru-106 9.OOE+00 1.70E+01 5.80E+01 TM L12964-02 9/12/2007 Sb-124 -8.OOE-01 3.60E+00 1.40E+01 TM L12964-02 9/12/2007 Sb-125 9.OOE-01 4.70E+00 1.60E+01 TM L12964-02 9/12/2007 Se-75 1.20E+00 2.1OE+00 7.1OE+00 TM L12964-02 9/12/2007 Zn-65 -4.80E+00 4.90E+00 1.80E+01 TM L12964-02 9/12/2007 Zr-95 1.80E+00 3.50E+00 1.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-170-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L13019-02 9/26/2007 AcTh-228 -1.10E+01 1.1 OE+0 1 4.20E+01 TM L13019-02 9/26/2007 Ag-108m 3.OOE+00 2.30E+00 7.60E+00 TM L13019-02 9/26/2007 Ag-il0m -6.OOE-01 3.20E+00 1.20E+01 TM L13019-02 9/26/2007 Ba-140 -3.40E+00 3.OOE+00 1.40E+01 TM L13019-02 9/26/2007 Be-7 2.40E+01 2.20E+01 7.50E+01 TM L13019-02 9/26/2007 Ce- 141 -6.OOE-01 3.70E+00 1.30E+01 TM L13019-02 9/26/2007 Ce-144 -6.OOE+00 1.40E+01 5.OOE+01 TM L13019-02 9/26/2007 Co-57 -2.20E+00 1.60E+00 6.10E+00 TM L13019-02 9/26/2007 Co-58 2.60E+00 2.60E+00 8.90E+00 TM L13019-02 9/26/2007 Co-60 -1.20E+00 2.OOE+00 8.70E+00 TM L13019-02 9/26/2007 Cr-51 5.50E+01 2.30E+01 7.1OE+01 TM L13019-02 9/26/2007 Cs-134 9.OOE-01 2.70E+00 9.70E+00 TM L13019-02 9/26/2007 Cs-137 2.40E+00 2.70E+00 9.50E+00 TM L13019-02 9/26/2007 Fe-59 2. 1OE+00 6.1OE+00 2.20E+01 TM L13019-02 9/26/2007 1-131 6.OOE-02 1.30E-01 5.80E-01 TM L13019-02 9/26/2007 1-131 6.50E+00 4.90E+00 1.60E+01 TM L13019-02 9/26/2007 K-40 1.55E+03 1.00E+02 1.40E+02 TM L13019-02 9/26/2007 La-140 -3.90E+00 3.40E+00 1.60E+01 TM L13019-02 9/26/2007 Mn-54 -3.30E+00 2.50E+00 1.00E+01 TM L13019-02 9/26/2007 Nb-95 4.OOE+00 2.50E+00 8.OOE+00 TM L13019-02 9/26/2007 Ru-103 -7.90E+00 2.60E+00 1.1 OE+0 1 TM L13019-02 9/26/2007 Ru-106 -7.OOE+00 2.1OE+-I01 8.OOE+01 TM L13019-02 9/26/2007 Sb-124 7.40E+00 4.70E+00 1.50E+01 TM L13019-02 9/26/2007 Sb-125 -4.30E+00 6.30E+00 2.40E+01 TM L13019-02 9/26/2007 Se-75 -2.40E+00 2.90E+00 1.10E+01 TM L13019-02 9/26/2007 Zn-65 -4.80E+00 5.40E+00 2.20E+01 TM L13019-02 9/26/2007 Zr-95 2.90E+00 4.70E+00 1.70E+01 TM L13158-02 10/24/2007 AcTh-228 -2.90E+00 8.OOE+00 3.OOE+01 TM L13158-02 10/24/2007 Ag-108m 2.OOE-01 1.90E+00 6ý80E+00 TM L13158-02 10/24/2007 Ag-lil0m 4.OOE-01 3.20E+00 1.20E+01 TM L13158-02 10/24/2007 Ba-140 2.70E+00 3.30E+00 1.20E+01 TM L13158-02 10/24/2007 Be-7 1.50E+01 1.70E+01 5.80E+01 TM L13158-02 10/24/2007 Ce-141 -5.OOE-01 3.30E+00 1.1OE+0I TM L13158-02 10/24/2007 Ce-144 0.OOE+00 1.20E+01 4.10E+01 TM 113158-02 10/24/2007 Co-57 -4.OOE+00 1.70E+00 6.30E+00 TM L13158-02 10/24/2007 Co-58 -3.OOE-01 1.70E+00 6.60E+00 TM L13158-02 10/24/2007 Co-60 -1.70E+00 2.OOE+00 8.30E+00 TM L13158-02 10/24/2007 Cr-51 -1.70E+01 2.OOE+01 7.20E+01 TM L13158-02 10/24/2007 Cs-134 -1.40E+00 2.50E+00 9.40E+00 TM L13158-02 10/24/2007 Cs-137 1.09E+01 3.40E+00 1.00E+01 TM L13158-02 10/24/2007 Fe-59 -6.50E+00 6.OOE+00 2.30E+0I TM L13158-02 10/24/2007 1-131 -4.30E+00 3.80E+00 1.40E+01 TM L13158-02 10/24/2007 1-131 -6.62E-02 9.50E-03 6.20E-01 TM L13158-02 10/24/2007 K-40 1.64E+03 9.OOE+01 1.20E+02 TM L13158-02 10/24/2007 La-140 2.70E+00 3.30E+00 1.20E+01 TM L13158-02 10/24/2007 Mn-54 3.60E+00 2.30E+00 7.40E+00 TM L13158-02 10/24/2007 Nb-95 1.00E+00 2.20E+00 8.OOE+00 TM L13158-02 10/24/2007 Ru- 103 -1.70E+00 2.10E+00 8.OOE+00 TM L13158-02 10/24/2007 Ru-106 -1.00E+01 2.OOE+01 7.40E+01 TM L13158-02 10/24/2007 Sb-124 -1.00E+00 5. 1OE+00 2.OOE+01 TM L13158-02 10/24/2007 Sb-125 4.30E+00 5.60E+00 1.90E+01 TM L13158-02 10/24/2007 Se-75 2.00E-01 2.70E+00 9.30E+00 TM L13158-02 10/24/2007 Zn-65 -6.70E+00 6.1OE+00 2.30E+0I TM L13158-02 10/24/2007 Zr-95 5.00E-01 3.70E+00 1.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-171-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM L13274-02 11/20/2007 AcTh-228 3.10E+00 8.1OE+00 2.90E+01 TM L13274-02 11/20/2007 Ag-108m -1.30E+00 1.60E+00 5.90E+00 TM L13274-02 11/20/2007 Ag-110m -3.20E+00 3. 10OE+00 1.20E+01 TM L13274-02 11/20/2007 Ba-140 -3.60E+00 3.30E+00 1.40E+01 TM L13274-02 11/20/2007 Be-7 0.OOE+00 1.60E+01 5.90E+0 1 TM L13274-02 11/20/2007 Ce-141 -3.70E+00 2.90E+00 1.10E+01 TM L13274-02 11/20/2007 Ce-144 -1.40E+01 1.1OE+01 4.1OE+01 TM L13274-02 11/20/2007 Co-57 2.1OE+00 1.40E+00 4.60E+00 TM L13274-02 11/20/2007 Co-58 5.20E+00 2.20E+00 6.80E+00 TM L13274-02 11/20/2007 Co-60 1.60E+00 2.30E+00 8.1OE+00 TM L13274-02 11/20/2007 Cr-51 1.20E+01 1.80E+01 6.40E+01 TM L13274-02 11/20/2007 Cs-134 -3.40E+00 2.20E+00 8.70E+00 TM L13274-02 11/20/2007 Cs-137 1.20E+00 2.20E+00 7.60E+00 TM L13274-02 11/20/2007 Fe-59 1.10E+01 5.50E+00 1.70E+01 TM L13274-02 11/20/2007 1-131 -1.35E-01 2.20E-02 7.60E-01 TM L13274-02 11/20/2007 1-131 -2.50E+00 3.60E+00 1.30E+01 TM L13274-02 11/20/2007 K-40 1.48E+03 8.20E+01 1.20E+02 TM L13274-02 11/20/2007 La-140 -3.60E+00 3.30E+00 1.40E+01 TM L13274-02 11/20/2007 Mn-54 -6.OOE-01 2.OOE+00 7.30E+00 TM L13274-02 11/20/2007 Nb-95 -1.OOE-01 2.60E+00 9.50E+00 TM L13274-02 11/20/2007 Ru-103 -5.OOE+00 2.40E+00 9.20E+00 TM L13274-02 11/20/2007 Ru-106 -1.80E+01 1.80E+01 6.90E+01 TM L13274-02 11/20/2007 Sb- 124 -9.40E+00 4.50E+00 2.1OE+01 TM L13274-02 11/20/2007 Sb-125 6.OOE-01 5.1OE+00 1.80E+01 TM L13274-02 11/20/2007 Se-75 -4.30E+00 2.60E+00 9.50E+00 TM L13274-02 11/20/2007 Zn-65 -6.70E+00 5.40E+00 2.1OE+01 TM L13274-02 11/20/2007 Zr-95 -5.OOE-01 3.90E+00 1.40E+01 TM L13400-02 12/19/2007 AcTh-228 1.27E+01 4.40E+00 1.30E+01 TM L13400-02 12/19/2007 Ag-108m 8.OOE-01 1.20E+00 4.1OE+00 TM L13400-02 12/19/2007 Ag-il0m 2.30E+00 2.30E+00 7.90E+00 TM L13400-02 12/19/2007 Ba-140 1.00E+00 3.50E+00 1.30E+01 TM L13400702 12/19/2007 Be-7 2.10E+01 1.20E+01 4.OOE+01 TM L13400-02 12/19/2007 Ce-141 4.90E+00 2.40E+00 7.80E+00 TM L13400-02 12/19/2007 Ce-144 -5.80E+00 7.10E+00 2.50E+01 TM L13400-02 12/19/2007 Co-57 -6.20E-01 9.OOE-01 3.1OE+00 TM L13400-02 12/19/2007 Co-58 0.OOE+00 1.50E+00 5.30E+00 TM L13400-02 12/19/2007 Co-60 -1.30E+00 1.80E+00 6.70E+00 TM L13400-02 12/19/2007 Cr-51 9.OOE+00 1.70E+01 5.60E+01 TM L13400-02 12/19/2007 Cs-134 0.OOE+00 1.50E+00 5.50E+00 TM L,13400-02 12/19/2007 Cs-137 1.70E+00 1.70E+00 5.80E+00 TM L134007 02 12/19/2007 Fe-59 -4.OOE-01 4. 1OE+00 1.40E+01 TM L13400-02 12/19/2007 1-131 -1.20E+00 3.50E+00 1.20E+01 TM L13400-02 12/19/2007 1-131 -1.69E-01 2.50E-02 7.20E-01 TM L13400-02 12/19/2007 K-40 1.55E+03 6.20E+01 7.90E+01 TM L13400-02 12/19/2007 La- 140 1.00E+00 3.50E+00 1.30E+01 TM L13400-02 12/19/2007 Mn-54 -1.00E-01 1.40E+00 5.1OE+00 TM L13400-02 12/19/2007 Nb-95 1.30E+00 2.OOE+00 6.70E+00 TM L13400-02 12/19/2007 Ru-103 -1.50E+00 1.60E+00 5.90E+00 TM L13400-02 12/19/2007 Ru-106 1.70E+01 1.40E+01 4.80E+01 TM L13400-02 12/19/2007 Sb-124 -4.90E+00 3.80E+00 1.50E+01 TM L13400-02 12/19/2007 Sb-125 0.OOE+00 3.40E+00 1.20E+01 TM L13400-02 12/19/2007 Se-75 -1.50E+00 1.50E+00 5.20E+00 TM L13400-02 12/19/2007 Zn-65 -7.70E+00 4.1OE+00 1.60E+01 TM L13400-02 12/19/2007 Zr-95 2.30E+00 2.90E+00 9.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-172-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 Li 1940-03 1/17/2007 AcTh-228 7.90E+00 7.20E+00 2.40E+01 TM 20 Li 1940-03 1/17/2007 Ag-108m -9.00E-01 1.80E+00 6.40E+00 TM 20 Li 1940-03 1/17/2007 Ag-110mn 4.60E+00 2.30E+00 7.40E+00 TM 20 Li 1940-03 1/17/2007 Ba-140 2.40E+00 2.60E+00 9.OOE+00 TM 20 LI 1940-03 1/17/2007 Be-7 -3.OOE+00 1.70E+01 6.10E+01 TM 20 LI 1940-03 1/17/2007 Ce-141 2.20E+00 3.1OE+00 1.00E+01 TM 20 Li 1940-03 1/17/2007 Ce-144 -4.OOE-01 9.60E+00 3.30E+0I TM 20 Li 1940-03 1/17/2007 Co-57 1.10E+00 1.30E+00 4.30E+00 TM 20 Li 1940-03 1/17/2007 Co-58 -1.80E+00 2.OOE+00 7.40E+00 TM 20 Li 1940-03 1/17/2007 Co-60 -3.OOE-01 1.70E+00 6.60E+00 TM 20 Li 1940-03 1/17/2007 Cr-51 -4.OOE+01 1.80E+01 6.70E+01 TM 20 Ll 1940-03 1/17/2007 Cs-134 -1.00E+00 2.OOE+00 7.40E+00 TM 20 Li 1940-03 1/17/2007 Cs-137 4.OOE-01 1.70E+00 6.20E+00 TM 20 Li 1940-03 1/17/2007 Fe-59 -1.20E+00 4.60E+00 1.70E+01 TM 20 LI 1940-03 1/17/2007 1-131 -3.OOE+00 3.60E+00 1.30E+01 TM 20 Li 1940-03 1/17/2007 1-131 1.80E-01 1.90E-01 7.10E-01 TM 20 Li 1940-03 1/17/2007 K-40 1.29E+03 6.60E+01 8.60E+01 TM 20 Li1940-03 1/17/2007 La- 140 2.80E+00 3.OOE+00 1.00E+01 TM 20 Li 1940-03 1/17/2007 Mn-54 -1.50E+00 1.80E+00 6.90E+00 TM 20 Li 1940-03 1/17/2007 Nb-95 3.30E+00. 2. 1OE+00 7.OOE+00 TM 20 Li1940-03 1/17/2007 Ru-103 -2.OOE-01 2. 1OE+00 7.30E+00 TM 20 Li1940-03 1/17/2007 Ru-106 -4.OOE+00 1.70E+01 6.30E+0I TM 20 LI1940-03 1/17/2007 Sb-124 -4.70E+00 3.30E+00 1.50E+01 TM 20 Li 1940-03 1/17/2007 Sb-125 -4.OOE-01 4.70E+00 1.70E+01 TM 20 Li1940-03 1/17/2007 Se-75 -8.OOE-01 2.30E+00 8.20E+00 TM 20 Li 1940-03 1/17/2007 Zn-65 -9.OOE+00 4.80E+00 1.90E+01 TM 20 LI 1940-03 1/17/2007 Zr-95 1.90E+00 3.60E+00 1.20E+01 TM 20 L12034-03 2/13/2007 AcTh-228 1.1 OE+00 8.1OE+00 3.OOE+01 TM 20 L12034-03 2/13/2007 Ag- 108m -3.30E+00 1.70E+00 6.80E+00 TM 20 L12034-03 2/13/2007 Ag-110in -1.30E+00 2.90E+00 1.10E+01 TM 20 L12034-03 2/13/2007 Ba-140 3.20E+00 3.70E+00 1.30E+01 TM 20 L12034-03 2/13/2007 Be-7 -1.IOE+01 1.80E+01 6.80E+01 TM 20 L12034-03 2/13/2007 Ce-141 5.1OE+00 3.80E+00 1.30E+01 TM 20 L12034-03 2/13/2007 Ce-144 1.00E+00 1.10E+01 3.90E+0I TM 20 L12034-03 2/13/2007 Co-57 1.40E+00 1.60E+00 5.30E+00 TM 20 L12034-03 2/13/2007 Co-58 2.OOE+00 2.OOE+00 6.80E+00 TM 20 L12034-03 2/13/2007 Co-60 3.90E+00 2.70E+00 9.OOE+00 TM 20 L12034-03 2/13/2007 Cr-51 1.00E+01 1.90E+01 6.70E+01 TM 20 L12034-03 2/13/2007 Cs-134 4.80E+00 2.50E+00 8.10E+00 TM 20 L12034-03 2/13/2007 Cs-137 1.60E+00 2.1OE+00 7.50E+00 TM 20 L12034-03 2/13/2007 Fe-59 -2.40E+00 5.80E+00 2.20E+01 TM 20 L12034-03 2/13/2007 1-131 -4.80E+00 4.50E+00 1.70E+01 TM 20 L12034-03 2/13/2007 1-131 7.OOE-02 1.60E-01 7.30E-01 TM 20 L12034-03 2/13/2007 K-40 1.34E+03 8.20E+01 1.1OE+02 TM 20 L12034-03 2/13/2007 La-140 3.60E+00 4.30E+00 1.50E+01 TM 20 L12034-03 2/13/2007 Mn-54 3.OOE-01 1.90E+00 7.10E+00 TM 20 L12034-03 2/13/2007 Nb-95 2.70E+00 2.60E+00 9.OOE+00 TM 20 L12034-03 2/13/2007 Ru-103 8.OOE-01 2.40E+00 8.60E+00 TM 20 L12034-03 2/13/2007 Ru-106 1.60E+01 1.80E+01 6.1OE+0I TM 20 L12034-03 2/13/2007 Sb-124 1.20E+00 4.60E+00 1.80E+01 TM 20 L12034-03 2/13/2007 Sb-125 -2.50E+00 5.80E+00 2.1OE+0I TM 20 L12034-03 2/13/2007 Se-75 -4.80E+00 2.60E+00 9.80E+00 TM 20 L12034-03 2/13/2007 Zn-65 -1.00E-01 5.90E+00 2.20E+01 TM 20 L12034-03 2/13/2007 Zr-95 -5.10E+00 3.90E+00 1.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-173-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L12148-03 3/14/2007 AcTh-228 1.08E+01 6.60E+00 2.20E+01 TM 20 L12148-03 3/14/2007 Ag-108m 3.40E+00 1.50E+00 4.70E+00 TM 20 L12148-03 3/14/2007 Ag-0mrn 2.80E+00 2.70E+00 9.20E+00 TM 20 L12148-03 3/14/2007 Ba-140 -2.40E+00 3.30E+00 1.30E+01 TM 20 L12148-03 3/14/2007 Be-7 -3.10E+01 1.40E+01 5.60E+01 TM 20 L12148-03 3/14/2007 Ce- 141 2.30E+00 2.90E+00 9.70E+00 TM 20 L12148-03 3/14/2007 Ce-144 -5.80E+00 7.80E+00 2.80E+01 TM 20 L12148-03 3/14/2007 Co-57 8.60E-01 9.60E-01 3.30E+00 TM 20 L12148-03 3/14/2007 Co-58 -2.OOE-01 1.90E+00 6.80E+00 TM 20 L12148-03 3/14/2007 Co-60 -3.OOE-01 2. 1OE+00 7.90E+00 TM 20 L12148-03 3/14/2007 Cr-51 -1.80E+01 1.40E+01 5.20E+01 TM 20 L12148-03 3/14/2007 Cs-134 0.OOE+00 2.30E+00 8.20E+00 TM 20 L12148-03 3/14/2007 Cs-137 9.OOE-01 1.80E+00 6.20E+00 TM 20 L12148-03 3/14/2007 Fe-59 2.40E+00 4.40E+00 1.60E+01 TM 20 L12148-03 3/14/2007 1-131 -2.30E+00 2.80E+00 1.00E+01 TM 20 L12148-03 3/14/2007 1-131 -8.20E-02 1.50E-02 7.10E-01 TM 20 L12148-03 3/14/2007 K-40 1.26E+03 7.1OE+01 8.OOE+01 TM 20 L12148-03 3/14/2007 La-140 -2.70E+00 3.70E+00 1.50E+01 TM 20 L12148-03 3/14/2007 Mn-54 2.70E+00 1.90E+00 6.30E+00 TM 20 L12148-03 3/14/2007 Nb-95 1.50E+00 2.30E+00 7.90E+00 TM 20 L12148-03 3/14/2007 Ru-103 0.OOE+00 1.80E+00 6.30E+00 TM 20 L12148-03 3/14/2007 Ru-106 -9.OOE+00 1.40E+01 5.30E+01 TM 20 L12148-03 3/14/2007 Sb-124 -1.00E+00 4.50E+00 1.80E+01 TM 20 L12148-03 3/14/2007 Sb-125 1.70E+00 4.40E+00 1.50E+01 TM 20 L12148-03 3/14/2007 Se-75 -1.30E+00 1.90E+00 6.80E+00 TM 20 L12148-03 3/14/2007 Zn-65 -4.20E+00 4.80E+00 1.80E+01 TM 20 L12148-03 3/14/2007 Zr-95 -1.80E+00 3.70E+00 1.40E+01 TM 20 L12273-03 4/11/2007 AcTh-228 5.90E+00 9. 1OE+00 3.20E+01 TM 20 L12273-03 4/11/2007 Ag-108m -1.20E+00 1.80E+00 6.60E+00 TM 20 L12273-03 4/11/2007 Ag-0mrn 0.OOE+00 3.1OE+00 1.20E+01 TM 20 L12273-03 4/11/2007 Ba-140 9.80E+00 4.50E+00 1.40E+01 TM 20 L12273-03 4/11/2007 Be-7 1.00E+01 1.70E+01 5.90E+01 TM 20 L12273-03 4/11/2007 Ce-141 - 1.00E+00 3.OOE+00 1.00E+01 TM 20 L12273-03 4/11/2007 Ce-144 -7.OOE+00 1.00E+01 3.70E+0I TM 20 L12273-03 4/11/2007 Co-57 -3.OOE-01 1.30E+00 4.60E+00 TM 20 L12273-03 4/11/2007 Co-58 5.OOE-01 2.30E+00 8.40E+00 TM 20 L12273-03 4/11/2007 Co-60 -2.90E+00 2.80E+00 1.1 OE+0 1 TM 20 L12273-03 4/11/2007 Cr-51 1.90E+01 1.80E+01 6.1OE+01 TM 20 L12273-03 4/11/2007 Cs-134 9.OOE-01 2.50E+00 8.90E+00 TM 20 L12273-03 4/11/2007 Cs-137 9.OOE-01 2.80E+00 9.70E+00 TM 20 L12273-03 4/11/2007 Fe-59 4. 1OE+00 5.1OE+00 1.80E+01 TM 20 L12273-03 4/11/2007 1-131 -1.50E+00 3.60E+00 1.30E+01 TM 20 L12273-03 4/11/2007 1-131 1.30E-01 2.10E-01 8.80E-01 TM 20 L12273-03 4/11/2007 K-40 1.39E+03 9.20E+01 1.40E+02 TM 20 L12273-03 4/11/2007 La- 140 1.12E+0 1 5.10E+00 1.60E+01 TM 20 L12273-03 4/11/2007 Mn-54 -2.10E+00 2.OOE+00 8.1OE+00 TM 20 L12273-03 4/11/2007 Nb-95 1.40E+00 2.20E+00 7.70E+00 TM 20 L12273-03 4/11/2007 Ru-103 -4.40E+00 2.30E+00 9.1OE+00 TM 20 L12273-03 4/11/2007 Ru-106 2.90E+01 2.30E+01 7.70E+01 TM 20 L12273-03 4/11/2007 Sb-124 -4.1 OE+00 5.20E+00 2.30E+01 TM 20 L12273-03 4/11/2007 Sb-125 7.OOE-01 5.90E+00 2.1 OE+0 1 TM 20 L12273-03 4/11/2007 Se-75 2.10E+00 2.30E+00 7.70E+00 TM 20 L12273-03 4/11/2007 Zn-65 -8.40E+00 5.60E+00 2.20E+01 TM 20 L12273-03 4/11/2007 Zr-95 -6.20E+00 3.90E+00 1.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-174-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L12344-03 4/25/2007 AcTh-228 -2.20E+01 9.50E+00 4.10E+01 TM 20 L12344-03 4/25/2007 Ag-108m 8.OOE-01 2.1OE+00 7.40E+00 TM 20 L12344-03 4/25/2007 Ag-il0m 1.20E+00 3.50E+00 1.30E+01 TM 20 L12344-03 4/25/2007 Ba-140 5.OOE-01 2.90E+00 1.20E+01 TM 20 L12344-03 4/25/2007 Be-7 -4.OOE+00 1.90E+01 7. 1OE+0I TM 20 L12344-03 4/25/2007 Ce-141 -2.1 OE+00 3.40E+00 1.20E+01 TM 20 L12344-03 4/25/2007 Ce-144 -5.OOE+00 1.30E+01 4.80E+01 TM 20 L12344-03 4/25/2007 Co-57 0.OOE+00 1.80E+00 6.40E+00 TM 20 L12344-03 4/25/2007 Co-58 8.OOE-01 2.50E+00 9.20E+00 TM 20 L12344-03 4/25/2007 Co-60 -2.30E+00 2.80E+00 1.10E+01 TM 20 L12344-03 4/25/2007 Cr-51 -1.30E+01 2.30E+01 8.30E+01 TM 20 L12344-03 4/25/2007 Cs-134 9.OOE-01 3.OOE+00 1.10E+01 TM 20 L12344-03 4/25/2007 Cs-137 -3.50E+00 2.80E+00 1.10E+01 TM 20 L12344-03 4/25/2007 Fe-59 9.OOE-01 6.30E+00 2.30E+01 TM 20 L12344-03 4/25/2007 1-131 6.OOE-01 4.OOE+00 1.40E+01 TM 20 L12344-03 4/25/2007 1-131 -1.31E-01 2.1OE-02 8.20E-01 TM 20 L12344-03 4/25/2007 K-40 1.25E+03 9.20E+01 1.40E+02 TM 20 L12344-03 4/25/2007 La-140 6.OOE-01 3.30E+00 1.30E+01 TM 20 L12344-03 4/25/2007 Mn-54 1.60E+00 2.70E+00 9.40E+00 TM 20 L12344-03 4/25/2007 Nb-95 -2.20E+00 2.30E+00 9.30E+00 TM 20 L12344-03 4/25/2007 Ru-i103 -6.OOE-01 2.1OE+00 8. 1OE+00 TM 20 L12344-03 4/25/2007 Ru-106 -1.60E+01 2.20E+01 8.40E+01 TM 20 L12344-03 4/25/2007 Sb-124 3.60E+00 6.1OE+00 2.30E+01 TM 20 L12344-03 4/25/2007 Sb-125 4.30E+00 6.30E+00 2.20E+01 TM 20 L12344-03 4/25/2007 Se-75 -3.OOE-01 2.70E+00 9.60E+00 TM 20 L12344-03 4/25/2007 Zn-65 -5.10E+00 5.90E+00 2.30E+01 TM 20 L12344-03 4/25/2007 Zr-95 -7.OOE-01 3.90E+00 1.50E+01 TM 20 L12403-03 5/9/2007 AcTh-228 6. 1OE+00 9.90E+00 3.50E+01 TM 20 L12403-03 5/9/2007 Ag-108m -2.OOE-01 2.OOE+00 7.40E+00 TM 20 L12403-03 5/9/2007 Ag-il0m -1.00E+00 3.30E+00 1.30E+01 TM 20 L12403-03 5/9/2007 Ba-140 8.OOE-01 3.1OE+00 1.20E+01 TM 20 L12403-03 5/9/2007 Be-7 -1.20E+01 1.60E+01 6.1OE+O1 TM 20 L12403-03 5/9/2007 Ce- 141 -2. 1OE+00 3.60E+00 1.30E+01 TM 20 L12403-03 5/9/2007 Ce-144 1.1OE+OI 1.40E+01 4.60E+01 TM 20 L12403-03 5/9/2007 Co-57 2.20E+00 1.70E+00 5.60E+00 TM 20 L12403-03 5/9/2007 Co-58 3.OOE+00 2.50E+00 8.50E+00 TM 20 L12403-03 5/9/2007 Co-60 2.50E+00 2.80E+00 9.70E+00 TM 20 L12403-03 5/9/2007 Cr-51 -2.1OE+OI 1.80E+01 6.80E+01 TM 20 L12403-03 5/9/2007 Cs-134 2.40E+00 2.80E+00 9.70E+00 TM 20 L12403-03 5/9/2007 Cs-137 -2.50E+00 2.50E+00 9.80E+00 TM 20 L12403-03 5/9/2007 Fe-59 -1.1IE+OI 6.70E+00 2.70E+01 TM 20 L12403-03 5/9/2007 1-131 -1.18E-01 1.70E-02 9.30E-0I TM 20 L12403-03 5/9/2007 1-131 -1.40E+00 4.OOE+00 1.50E+01 TM 20 L12403-03 5/9/2007 K-40 1.33E+03 8.90E+01 1.30E+02 TM 20 L12403-03 5/9/2007 La-140 9.OOE-01 3.60E+00 1.40E+01 TM 20 L12403-03 5/9/2007 Mn-54 1.40E+00 2.1,OE+00 7.30E+00 TM 20 L12403-03 5/9/2007 Nb-95 2.30E+00 2.80E+00 9.80E+00 TM 20 L12403-03 5/9/2007 Ru-103 -5.OOE+00 2.40E+00 9.80E+00 TM 20 L12403-03 5/9/2007 Ru-106 -2.80E+01 2.OOE+01 7.80E+01 TM 20 L12403-03 5/9/2007 Sb-124 1.30E+00 4.OOE+00 1.60E+01 TM 20 L12403-03 5/9/2007 Sb-125 6.50E+00 6. I OE+00 2.1OE+OI TM 20 L12403-03 5/9/2007 Se-75 -1.30E+00 3.OOE+00 1.1 OE+0 I TM 20 L12403-03 5/9/2007 Zn-65 -3.80E+00 5.60E+00 2.20E+01 TM 20 L12403-03 5/9/2007 Zr-95 -9.60E+00 4.40E+00 1.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-175-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L12468-03 5/23/2007 AcTh-228 -3.00E-01 4.40E+00 1.60E+01 TM 20 L12468-03 5/23/2007 Ag-108m 1.00E+00 1.00E+00 3.40E+00 TM 20 L12468-03 5/23/2007 Ag-110im 7.00E-01 1.60E+00 5.60E+00 TM 20 L12468-03 5/23/2007 Ba-140 2.OOE+00 2. 1OE+00 7.30E+00 TM 20 L12468-03 5/23/2007 Be-7 -3.OOE+00 1.1OE+0 I 4.OOE+01 TM 20 L12468-03 5/23/2007 Ce-I141 -1.40E+00 2.40E+00 8.20E+00 TM 20 L12468-03 5/23/2007 Ce-144 1.40E+00 7.40E+00 2.50E+01 TM 20 L12468-03 5/23/2007 Co-57 -3.OOE-01 9.5OE-0I 3.30E+00 TM 20 L12468-03 5/23/2007 Co-58 1.20E+00 1.20E+00 4.1OE+00 TM 20 L12468-03 5/23/2007 Co-60 1.40E+00 1.20E+00 4.20E+00 TM 20 L12468-03 5/23/2007 Cr-51 -2.OOE+00 1.30E+01 4.40E+OI TM 20 L12468-03 5/23/2007 Cs-134 4.OOE-01 1.20E+00 4.20E+00 TM 20 L12468-03 5/23/2007 Cs-137 -2.OOE+00 1.00E+00 4.1OE+00 TM 20 L12468-03 5/23/2007 Fe-59 1.80E+00 3.1OE+00 1.1OE+OI TM 20 L12468-03 5/23/2007 1-131 -2.50E+00 3.40E+00 1.20E+01 TM 20 L12468-03 5/23/2007 1-131 1.60E-01 1.60E-01 6.10E-01 TM 20 L12468-03 5/23/2007 K-40 1.35E+03 4.80E+01 5.30E+O1 TM 20 L12468-03 5/23/2007 La-140 2.40E+00 2.40E+00 8.40E+00 TM 20 L12468-03 5/23/2007 Mn-54 -7.OOE-01 1.1OE+00 4.OOE+00 TM 20 L12468-03 5/23/2007 Nb-95 -6.OOE-01 1.50E+00 5.30E+00 TM 20 L12468-03 5/23/2007 Ru-103 -2.20E+00 1.30E+00 5.OOE+00 TM 20 L12468-03 5/23/2007 Ru-106 0.OOE+00 1.1OE+0 I 3.90E+01 TM 20 L12468-03 5/23/2007 Sb-124 -1.70E+00 2.40E+00 9.50E+00 TM 20 L12468-03 5/23/2007 Sb-125 1.00E+00 3.1OE+00 1.1 OE+0 I TM 20 L12468-03 5/23/2007 Se-75 2.20E+00 1.60E+00 5.30E+00 TM 20 L12468-03 5/23/2007 Zn-65 -3.80E+00 5.40E+00 1.90E+01 TM 20 L12468-03 5/23/2007 Zr-95 -7.00E-01 1.90E+00 7.1OE+00 TM 20 L12520-03 6/6/2007 AcTh-228 9.1OE+00 8.1OE+00 2.80E+01 TM 20 L12520-03 6/6/2007 Ag-108m 3.70E+00 1.80E+00 5.80E+00 TM 20 L12520-03 6/6/2007 Ag-110in 0.OOE+00 3.20E+00 1.20E+01 TM 20 L12520-03 6/6/2007 Ba-140 -1.30E+00 3.10E+00 1.30E+01 TM 20 L12520-03 6/6/2007 Be-7 0.OOE+00 1.80E+01 6.50E+OI TM 20 L12520-03 6/6/2007 Ce- 141 I.20E+00 3.40E+00 1.20E+01 TM 20 L12520-03 6/6/2007 Ce-144 2.40E+01 1.20E+01 3.80E+01 TM 20 L12520-03 6/6/2007 Co-57 1.00E+00 1.50E+00 5.OOE+00 TM 20 L12520-03 6/6/2007 Co-58 -6.OOE-01 2.20E+00 8.1OE+00 TM 20 L12520-03 6/6/2007 Co-60 -2.20E+00 2.OOE+00 8.40E+00 TM 20 L12520-03 6/6/2007 Cr-51 -1.10E+01 1.90E+01 6.90E+01 TM 20 L12520-03 6/6/2007 Cs-134 -2.30E+00 2.OOE+00 8.20E+00 TM 20 L12520-03 6/6/2007 Cs-137 -2.40E+00 2.10E+00 8.30E+00 TM 20 L12520-03 6/6/2007 Fe-59 1.01E+01 5.20E+00 1.70E+01 TM 20 L12520-03 6/6/2007 1-131 1.30E-01 1.60E-01 6.50E-01 TM 20 L12520-03 6/6/2007 1-131 2.OOE+00 3.80E+00 1.30E+01 TM 20 L12520-03 6/6/2007 K-40 1.24E+03 7.80E+01 1.20E+02 TM 20 L12520-03 6/6/2007 La-140 -1.50E+00 3.60E+00 1.40E+01 TM 20 L12520-03 6/6/2007 Mn-54 2.70E+00 2.20E+00 7.30E+00 TM 20 L12520-03 6/6/2007 Nb-95 0.OOE+00 2.20E+00 8.OOE+00 TM 20 L12520-03 6/6/2007 Ru-103 -3.1OE+00 2.50E+00 9.40E+00 TM 20 L12520-03 6/6/2007 Ru-106 1.60E+01 1.90E+01 6.40E+01 TM 20 L12520-03 6/6/2007 Sb-i124 9.80E+00 4.80E+00 1.40E+01 TM 20 L12520-03 6/6/2007 Sb-125 8.10E+00 5.30E+00 1.70E+01 TM 20 L12520-03 6/6/2007 Se-75 -5.30E+00 2.70E+00 1.00E+01 TM 20 L12520-03 6/6/2007 Zn-65 -9.50E+00 5.80E+00 2.30E+OI TM 20 L12520-03 6/6/2007 Zr-95 -2.20E+00 3.70E+00 1.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-176-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L12580-03 6/20/2007 AcTh-228 2.60E+00 7.70E+00 2.70E+01 TM 20 L12580-03 6/20/2007 Ag-108m 1.80E+00 1.50E+00 4.90E+00 TM 20 L12580-03 6/20/2007 Ag-il0m 2.70E+00 2.50E+00 8.60E+00 TM 20 L12580-03 6/20/2007 Ba-140 -4.20E+00 3.20E+00 1.40E+01 TM 20 L12580-03 6/20/2007 Be-7 2.40E+01 1.70E+01 5.60E+01 TM 20 L12580-03 6/20/2007 Ce-141 1.1OE+00 2.50E+00 8.60E+00 TM 20 L12580-03 6/20/2007 Ce-144 -4.40E+00 8.80E+00 3.1OE+01 TM 20 L12580-03 6/20/2007 Co-57 2.40E+00 1.10E+00 3.70E+00 TM 20 L12580-03 6/20/2007 Co-58 -3.30E+00 2.1OE+00 8.20E+00 TM 20 L12580-03 6/20/2007 Co-60 1.70E+00 2.20E+00 7.70E+00 TM 20 L12580-03 6/20/2007 Cr-51 -2.20E+01 1.50E+01 5.60E+01 TM 20 L12580-03 6/20/2007 Cs-134 2.80E+00 2.20E+00 7.20E+00 TM 20 L12580-03 6/20/2007 Cs-137 4.80E+00 1.80E+00 5.40E+00 TM 20 L12580-03 6/20/2007 Fe-59 7.90E+00 4.80E+00 1.60E+01 TM 20 L12580-03 6/20/2007 1-131 -1.35E-01 2.1OE-02 7.60E-01 TM 20 L12580-03 6/20/2007 1-131 6.00E-01 4.50E+00 1.60E+01 TM 20 L12580-03 6/20/2007 K-40 1.49E+03 7.40E+01 1.00E+02 TM 20 L12580-03 6/20/2007 La-140 -4.90E+00 3.70E+00 1.60E+01 TM 20 L12580-03 6/20/2007 Mn-54 1.00E+00 2.OOE+00 7.10E+00 TM 20 L12580-03 6/20/2007 Nb-95 2.50E+00 2.40E+00 8.20E+00 TM 20 L12580-03 6/20/2007 Ru-103 -1.60E+00 1.90E+00 7.00E+00 TM 20 L12580-03 6/20/2007 Ru-106 8.OOE+00 1.50E+01 5.1OE+01 TM 20 L12580-03 6/20/2007 Sb-124 -4.50E+00 4.1OE+00 1.80E+01 TM 20 L12580-03 6/20/2007 Sb-125 1.90E+00 4.30E+00 1.50E+01 TM 20 L12580-03 6/20/2007 Se-75 -2.80E+00 1.90E+00 7.OOE+00 TM 20 L12580-03 6/20/2007 Zn-65 4.30E+00 4.70E+00 1.60E+01 TM 20 L12580-03 6/20/2007 Zr-95 5.OOE-01 3.60E+00 1.30E+01 TM 20 L12652-03 7/3/2007 AcTh-228 -2.50E+00 5.50E+00 2.OOE+01 TM 20 L12652-03 7/3/2007 Ag-108m -2.40E+00 1.1OE+00 4.OOE+00 TM 20 L12652-03 7/3/2007 Ag-110m -2.00E-01 1.80E+00 6.40E+00 TM 20 L12652-03 7/3/2007 Ba-140 0.OOE+00 2.90E+00 1.00E+0l TM 20 L12652-03 7/3/2007 Be-7 -1.90E+01 1.30E+01 4.70E+01 TM 20 L12652-03 7/3/2007 Ce-141 -1.70E+00 2.60E+00 9.10E+00 TM 20 L12652-03 7/3/2007 Ce-144 -2.50E+00 7.10E+00 2.50E+01 TM 20 L12652-03 7/3/2007 Co-57 7.80E-01 9.40E-01 3.20E+00 TM 20 L12652-03 7/3/2007 Co-58 3.OOE+00 1.50E+00 4.70E+00 TM 20 L12652-03 7/3/2007 Co-60 5.OOE-01 1.50E+00 5.1OE+00 TM 20 L12652-03 7/3/2007 Cr-51 -1.80E+01 1.50E+01 5.30E+01 TM 20 L12652-03 7/3/2007 Cs-134 1.60E+00 1.40E+00 4.80E+00 TM 20 L12652-03 7/3/2007 Cs-137 2.30E+00 1.30E+00 4.1OE+00 TM 20 L12652-03 7/3/2007 Fe-59 2.OOE+00 3.60E+00 1.20E+01 TM 20 L12652-03 7/3/2007 1-131 4.90E-01 2.70E-01 8.20E-01 TM 20 L12652-03 7/3/2007 1-131 5.40E+00 5.20E+00 1.70E+01 TM 20 L12652-03 7/3/2007 K-40 1.40E+03 4.90E+01 6.60E+01 TM 20 L12652-03 7/3/2007 La-140 0.OOE+00 3.30E+00 1.20E+01 TM 20 L12652-03 7/3/2007 Mn-54 -1.10E+00 1.30E+00 4.80E+00 TM 20 L12652-03 7/3/2007 Nb-95 1.10E+00 1.80E+00 6.20E+00 TM 20 L12652-03 7/3/2007 Ru-103 -6.40E+00 1.70E+00 6.50E+00 TM 20 L12652-03 7/3/2007 Ru-106 2.OOE+00 1.20E+01 4.20E+01 TM 20 L12652-03 7/3/2007 Sb-124 -5.30E+00 3.OOE+00 1.20E+01 TM 20 L12652-03 7/3/2007 Sb-125 4.30E+00 3.60E+00 I°20E+01 TM 20 L12652-03 7/3/2007 Se-75 -4.OOE-01 1.70E+00 6.OOE+00 TM 20 L12652-03 7/3/2007 Zn-65 -7.OOE+00 3.50E+00 1.30E+01 TM 20 L12652-03 7/3/2007 Zr-95 -2.20E+00 2.50E+00 9.1OE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-177-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L12698-03 7/18/2007 AcTh-228 1.1 OE+00 7.60E+00 2.70E+01 TM 20 L12698-03 7/18/2007 Ag-108m -1.50E+00 1.60E+00 5.80E+00 TM 20 L12698-03 7/18/2007 Ag-110in -1.90E+00 2.50E+00 9.40E+00 TM 20 L12698-03 7/18/2007 Ba-140 3.60E+00 3.80E+00 1.30E+01 TM 20 L12698-03 7/18/2007 Be-7 9.OOE+00 1.60E+01 5.40E+01 TM 20 L12698-03 7/18/2007 Ce- 141 7.50E+00 3.OOE+00 9.50E+00 TM 20 L12698-03 7/18/2007 Ce- 144 1.00E+00 1.00E+01 3.60E+01 TM 20 L12698-03 7/18/2007 Co-57 1.90E+00 1.20E+00 4.1OE+00 TM 20 L12698-03 7/18/2007 Co-58 -1.20E+00 1.90E+00 7.OOE+00 TM 20 L12698-03 7/18/2007 Co-60 -2.10E+00 2. 1OE+00 8.20E+00 TM 20 L12698-03 7/18/2007 Cr-51 -1.90E+01 1.90E+01 6.80E+01 TM 20 L12698-03 7/18/2007 Cs-134 2.40E+00 2.OOE+00 6.70E+00 TM 20 L12698-03 7/18/2007 Cs-137 5.30E+00 1.90E+00 5.70E+00 TM 20 L12698-03 7/18/2007 Fe-59 3.90E+00 4.60E+00 1.60E+01 TM 20 L12698-03 7/18/2007 1-131 6.50E-02 9.30E-02 3.90E-01 TM 20 L12698-03 7/18/2007 1-131 -5.OOE-01 5.OOE+00 1.80E+01 TM 20 L12698-03 7/18/2007 K-40 1.50E+03 7.1OE+01 8.30E+01 TM 20 L12698-03 7/18/2007 La-140 4.20E+00 4.40E+00 1.50E+01 TM 20 L12698-03 7/18/2007 Mn-54 1.30E+00 1.60E+00 5.70E+00 TM 20 L12698-03 7/18/2007 Nb-95 3.OOE-01 2.40E+00 8.50E+00 TM 20 L12698-03 7/18/2007 Ru-103 -1.10E+00 1.90E+00 7.1OE+00 TM 20 L12698-03 7/18/2007 Ru-106 2.60E+0 1 1.70E+01 5.70E+01 TM 20 L12698-03 7/18/2007 Sb-124 -2.10E+00 4.80E+00 1.90E+01 TM 20 L12698-03 7/18/2007 Sb4125 7.OOE-01 4.60E+00 1.60E+01 TM 20 L12698-03 7/18/2007 Se-75 -8.OOE-01 2.1OE+00 7.40E+00 TM 20 L12698-03 7/18/2007 Zn-65 -5.OOE-01 3.90E+00 1.40E+01 TM 20 L12698-03 7/18/2007 Zr-95 2.80E+00 3.40E+00 1.20E+01 TM 20 L12771-03 8/1/2007 AcTh-228 1.20E+01 1.1 OE+0I 3.90E+01 TM 20 L12771-03 8/1/2007 Ag-108m 3.OOE-01 2.20E+00 7.80E+00 TM 20 L12771-03 8/1/2007 Ag-110m -6.OOE-01 3.40E+00 1.30E+01 TM 20 L12771-03 8/1/2007 Ba-140 0.OOE+00 3.60E+00 1.50E+01 TM 20 L12771-03 8/1/2007 Be-7 -4.50E+01 2.OOE+01 8.30E+01 TM 20 L12771-03 8/1/2007 Ce-141 -1.60E+00 3.50E+00 1.20E+01 TM 20 L12771-03 8/1/2007 Ce-144 7.OOE+00 1.20E+01 4.1OE+0I TM 20 L12771-03 8/1/2007 Co-57 8.OOE-01 1.50E+00 5.20E+00 TM 20 L12771-03 8/1/2007 Co-58 -2.80E+00 2.30E+00 9.60E+00 TM 20 L12771-03 8/1/2007 Co-60 4.50E+00 3.1OE+00 1.00E+01 TM 20 L12771-03 8/1/2007 Cr-51 1.1 OE+0 1 2.1OE+0I 7.20E+01 TM 20 L12771-03 8/1/2007 Cs-134 1.60E+00 2.80E+00 1.00E+01 TM 20 L12771-03 8/1/2007 Cs-137 -3.30E+00 2.60E+00 1.00E+01 TM 20 L12771-03 8/1/2007 Fe-59 -1.48E+01 6.50E+00 2.80E+01 TM 20 L12771-03 8/1/2007 1-131 1.50E-01 1.50E-01 5.70E-0I TM 20 L12771-03 8/1/2007 1-131 4.90E+00 4. 1OE+00 1.40E+0I TM 20 L12771-03 8/1/2007 K-40 1.25E+03 9.80E+01 1.50E+02 TM 20 L12771-03 8/1/2007 La-140 0.OOE+00 4.20E+00 1.70E+01 TM 20 L12771-03 8/1/2007 Mn-54 -3.1OE+00 2.60E+00 1.00E+01 TM 20 L12771-03 8/1/2007 Nb-95 -1.00E+00 2.70E+00 1.00E+01 TM 20 L12771-03 8/1/2007 Ru-103 -7.OOE-01 2.70E+00 9.90E+00 TM 20 L12771-03 8/1/2007 Ru-106 -3.40E+01 2.40E+01 9.60E+0 1 TM 20 L12771-03 8/1/2007 Sb-124 -1.04E+01 6.50E+00 3.OOE+01 TM 20 L12771-03 8/1/2007 Sb-125 -9.30E+00 6.OOE+00 2.40E+01 TM 20 L12771-03 8/1/2007 Se-75 6.OOE-01 2.30E+00 8.30E+00 TM 20 L12771-03 8/1/2007 Zn-65 3.20E+00 6.OOE+00 2.20E+01 TM 20 L12771-03 8/1/2007 Zr-95 -4.60E+00 4.20E+00 1.70E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-178-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L12840-03 8/15/2007 AcTh-228 1.00E+00 1.00E+01 3.70E+01 TM 20 L12840-03 8/15/2007 Ag-108m 1.50E+00 2.20E+00 7.70E+00 TM 20 L12840-03 8/15/2007 Ag-110m 6.70E+00 3.80E+00 1.20E+01 TM 20 L12840-03 8/15/2007 Ba-140 3.1OE+00 3.50E+00 1.30E+01 TM 20 L12840-03 8/15/2007 Be-7 -3.50E+01 2.20E+01 8.80E+01 TM 20 L12840-03 8/15/2007 Ce-141 -4.1OE+00 4.OOE+00 1.50E+01 TM 20 L12840-03 8/15/2007 Ce-144 7.OOE+00 1.30E+01 4.70E+01 TM 20 L12840-03 8/15/2007 Co-57 2.OOE-01 2.OOE+00 7.1OE+00 TM 20 L12840-03 8/15/2007 Co-58 1.40E+00 2.90E+00 1.00E+01 TM 20 L12840-03 8/15/2007 Co-60 -3.20E+00 3.40E+00 1.40E+01 TM 20 L12840-03 8/15/2007 Cr-51 -8.OOE+00 2.30E+01 8.40E+01 TM 20 L12840-03 8/15/2007 Cs-134 -5.OOE-01 3.OOE+00 1.1OE+OI TM 20 L12840-03 8/15/2007 Cs-137 2.80E+00 2.70E+00 9.20E+00 TM 20 L12840-03 8/15/2007 Fe-59 -2.80E+00 5.70E+00 2.30E+01 TM 20 L12840-03 8/15/2007 1-131 0.OOE+00 4.60E+00 1.70E+01 TM 20 L12840-03 8/15/2007 1-131 -1.00E-03 6.OOE-02 3.60E-01 TM 20 L12840-03 8/15/2007 K-40 1.21E+03 9.90E+01 1.70E+02 TM 20 L12840-03 8/15/2007 La- 140 3.60E+00 4.OOE+00 1.40E+01 TM 20 L12840-03 8/15/2007 Mn-54 4.60E+00 2.70E+00 8.70E+00 TM 20 L12840-03 8/15/2007 Nb-95 4.OOE+00 3.20E+00 1.1 OE+0 1 TM 20 L12840-03 8/15/2007 Ru-103 -3.60E+00 3.20E+00 1.20E+01 TM 20 L12840-03 8/15/2007 Ru-106 3.OOE+01 2.70E+01 9.30E+01 TM 20 L12840-03 8/15/2007 Sb-124 -1.70E+00 5.80E+00 2.40E+01 TM 20 L12840-03 8/15/2007 Sb-125 -2.80E+00 5.90E+00 2.30E+01 TM 20 L12840-03 8/15/2007 Se-75 -1.40E+00 3.20E+00 I.20E+01 TM 20 L12840-03 8/15/2007 Zn-65 -1.81E+01 7.1OE+00 3.1 OE+0 1 TM 20 L12840-03 8/15/2007 Zr-95 2.50E+00 4.90E+00 1.80E+01 TM 20 L12964-03 9/12/2007 AcTh-228 1.13E+01 8.70E+00 2.90E+01 TM 20 L12964-03 9/12/2007 Ag-108m -1.90E+00 1.50E+00 5.90E+00 TM 20 L12964-03 9/12/2007 Ag-110m 4.OOE-01 3.10E+00 1.1 OE+0 1 TM 20 L12964-03 9/12/2007 Ba-140 -6.OOE-01 3.OOE+00 1.20E+01 TM 20 L12964-03 9/12/2007 Be-7 -8.OOE+00 1.50E+01 5.50E+01 TM 20 L12964-03 9/12/2007 Ce- 141 7.OOE-01 2.70E+00 9.20E+00 TM 20 L12964-03 9/12/2007 Ce-144 -5.OOE+00 1.1OE+01 3.90E+01 TM 20 L12964-03 9/12/2007 Co-57 0.OOE+00 1.50E+00 5.1OE+00 TM 20 L12964-03 9/12/2007 Co-58 3.OOE-01 2.30E+00 8.30E+00 TM 20 L12964-03 9/12/2007 Co-60 -2.OOE+00 2.40E+00 9.40E+00 TM 20 L12964-03 9/12/2007 Cr-51 -2.70E+01 1.80E+01 6.90E+01 TM 20 L12964-03 9/12/2007 Cs-134 -2.20E+00 2.10E+00 8.20E+00 TM 20 L12964-03 9/12/2007 Cs-137 3.60E+00 2.OOE+00 6.60E+00 TM 20 L12964-03 9/12/2007 Fe-59 2.OOE-01 4.90E+00 1.80E+01 TM 20 L12964-03 9/12/2007 1-131 -4.40E+00 3.60E+00 1.40E+01 TM 20 L12964-03 9/12/2007 1-131 -6.10E-02 1.00E-02 6.OOE-01 TM 20 L12964-03 9/12/2007 K-40 1.38E+03 8.OOE+01 1.20E+02 TM 20 L12964-03 9/12/2007 La-140 -7.OOE-01 3.50E+00 1.40E+01 TM 20 L12964-03 9/12/2007 Mn-54 -1.70E+00 1.80E+00 7.1OE+00 TM 20 L12964-03 9/12/2007 Nb-95 -9.OOE-01 2.70E+00 9.80E+00 TM 20 L12964-03 9/12/2007 Ru- 103 -2. 1OE+00 2.20E+00 8.1OE+00 TM 20 L12964-03 9/12/2007 Ru-106 3.OOE+00 1.70E+01 6.OOE+01 TM 20 L12964-03 9/12/2007 Sb-124 -4.20E+00 4.20E+00 1.80E+01 TM 20 L12964-03 9/12/2007 Sb-125 -2.80E+00 4.90E+00 1.80E+01 TM 20 L12964-03 9/12/2007 Se-75 1.40E+00 2.40E+00 8.40E+00 TM 20 L12964-03 9/12/2007 Zn-65 -7.30E+00 5.30E+00 2.10E+01 TM 20 L12964-03 9/12/2007 Zr-95 -7.50E+00 3.90E+00 1.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-179-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L13019-03 9/26/2007 AcTh-228 1.82E+01 9.50E+00 3.OOE+01 TM 20 L13019-03 9/26/2007 Ag-108m -1.60E+00 2.1OE+00 8.OOE+00 TM 20 L13019-03 9/26/2007 Ag-110m -7.60E+00 3.30E+00 1.50E+01 TM 20 L13019-03 9/26/2007 Ba-140 1.80E+00 2.90E+00 1.1OE+01 TM 20 L13019-03 9/26/2007 Be-7 3.30E+01 2.1OE+01 6.80E+01 TM 20 L13019-03 9/26/2007 Ce-141 -1.26E+01 5.80E+00 2.20E+01 TM 20 L13019-03 9/26/2007 Ce-144 1.30E+01 1.30E+01 4.50E+01 TM 20 L13019-03 9/26/2007 Co-57 4.OOE-01 1.70E+00 6.OOE+00 TM 20 L13019-03 9/26/2007 Co-58 -4.OOE-01 2.60E+00 9.70E+00 TM 20 L13019-03 9/26/2007 Co-60 1.70E+00 2.60E+00 9.40E+00 TM 20 L13019-03 9/26/2007 Cr-51 1.40E+01 2.20E+01 7.60E+01 TM 20 L13019-03 9/26/2007 Cs-134 -4.OOE+00 3.OOE+00 1.20E+01 TM 20 L13019-03 9/26/2007 Cs-137 1.90E+00 2.50E+00 8.80E+00 TM 20 L13019-03 9/26/2007 Fe-59 -8.10E+00 5.80E+00 2.40E+01 TM 20 L13019-03 9/26/2007 1-131 2.90E-02 9.80E-02 5.30E-01 TM 20 L13019-03 9/26/2007 1-131 -1.60E+00 4.60E+00 1.70E+01 TM 20 L13019-03 9/26/2007 K-40 1.36E+03 9.50E+01 1.30E+02 TM 20 L13019-03 9/26/2007 La-140 2.1OE+00 3.40E+00 1.30E+01 TM 20 L13019-03 9/26/2007 Mn-54 8.OOE-01 2.70E+00 9.90E+00 TM 20 L13019-03 9/26/2007 Nb-95 5.OOE-01 2.80E+00 1.00E+01 TM 20 L13019-03 9/26/2007 Ru-103 -4.70E+00 2.60E+00 1.00E+01 TM 20 L13019-03 9/26/2007 Ru-106 -5.OOE+00 2.40E+01 8.70E+01 TM 20 L13019-03 9/26/2007 Sb-124 -6.10E+00 5.70E+00 2.50E+01 TM 20 L13019-03 9/26/2007 Sb-125 3.30E+00 5.90E+00 2.1OE+01 TM 20 L13019-03 9/26/2007 Se-75 2.1OE+00 3.10E+00 1.1 OEE+0 1 TM 20 L13019-03 9/26/2007 Zn-65 1.OOE-01 6.OOE+00 2.20E+01 TM 20 L13019-03 9/26/2007 Zr-95 0.OOE+00 4.OOE+00 1.50E+01 TM 20 L13158-03 10/24/2007 AcTh-228 3.50E+00 9.90E+00 3.50E+01 TM 20 L13158-03 10/24/2007 Ag-108m -6.OOE-01 1.70E+00 6.40E+00 TM 20 L13158-03 10/24/2007 Ag-i 10m -1.80E+00 3.OOE+00 1.20E+01 TM 20 L13158-03 10/24/2007 Ba-140 2.50E+00 3.90E+00 1.40E+01 TM 20 L13158-03 10/24/2007 Be-7 6.OOE+00 1.60E+01 5.70E+01 TM 20 L13158-03 10/24/2007 Ce-141 - 1.22E+01 3.40E+00 1.30E+01 TM 20 L13158-03 10/24/2007 Ce-144 1.80E+01 1.20E+01 4.1OE+01 TM 20 L13158-03 10/24/2007 Co-57 1.30E+00 1.60E+00 5.40E+00 TM 20 L13158-03 10/24/2007 Co-58 0.OOE+00 2.40E+00 8.90E+00 TM 20 L13158-03 10/24/2007 Co-60 -4.40E+00 2.80E+00 1.20E+01 TM 20 L13158-03 10/24/2007 Cr-51 -9.OOE+00 2.OOE+01 7.20E+0 1 TM 20 L13158-03 10/24/2007 Cs-134 1.40E+00 2.50E+00 8.80E+00 TM 20 L13158-03 10/24/2007 Cs-137 1.50E+00 2.OOE+00 7.1OE+00 TM 20 L13158-03 10/24/2007 Fe-59 2.70E+00 5.50E+00 2.OOE+01 TM 20 L13158-03 10/24/2007 1-131 7.OOE-02 1.40E-01 6.80E-01 TM 20 L13158-03 10/24/2007 1-131 3.70E+00 4. 1OE+00 1.40E+01 TM 20 L13158-03 10/24/2007 K-40 1.24E+03 8.30E+01 1.30E+02 TM 20 L13158-03 10/24/2007 La- 140 2.50E+00 3.90E+00 1.40E+01 TM 20 L13158-03 10/24/2007 Mn-54 -4.1 OE+00 2.20E+00 8.90E+00 TM 20 L13158-03 10/24/2007 Nb-95 -4.70E+00 2.60E+00 1.10E+01 TM 20 L13158-03 10/24/2007 Ru- 103 -4.70E+00 2.80E+00 1.1 OE+0 I TM 20 L13158-03 10/24/2007 Ru-106 -9.OOE+00 2.00E+0I 7.50E+01 TM 20 L13158-03 10/24/2007 Sb-124 -3.60E+00 4.30E+00 1.90E+01 TM 20 L13158-03 10/24/2007 Sb-125 -4.50E+00 5.50E+00 2.1OE+01 TM 20 L13158-03 10/24/2007 Se-75 2.30E+00 2.70E+00 9.1OE+00 TM 20 L13158-03 10/24/2007 Zn-65 -1.09E+01 7.OOE+00 2.70E+01 TM 20 L13158-03 10/24/2007 Zr-95 -5.70E+00 4. 1OE+00 1.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-180-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 L13274-03 11/20/2007 AcTh-228 -6.30E+00 7.70E+00 3.OOE+01 TM 20 L13274-03 11/20/2007 Ag-108m -9.OOE-01 2.OOE+00 7.30E+00 TM 20 L13274-03 11/20/2007 Ag-110m -2.70E+00 3.40E+00 1.30E+01 TM 20 L13274-03 11/20/2007 Ba-140 7.70E+00 3.90E+00 1.20E+01 TM 20 L13274-03 11/20/2007 Be-7 -3.10E+01 1.60E+01 6.50E+01 TM 20 L13274-03 11/20/2007 Ce-141 1.60E+00 3.20E+00 1.1OE+01 TM 20 L13274-03 11/20/2007 Ce-144 1.70E+01 1.30E+01 4.20E+01 TM 20 L13274-03 11/20/2007 Co-57 1.40E+00 1.50E+00 5.OOE+00 TM 20 L13274-03 11/20/2007 Co-58 2.90E+00 2.30E+00 7.80E+00 TM 20 L13274-03 11/20/2007 Co-60 1.80E+00 2.OOE+00 7.OOE+00 TM 20 L13274-03 11/20/2007 Cr-51 1.40E+01 2.OOE+01 7.OOE+01 TM 20 L13274-03 11/20/2007 Cs-134 -1.00E+00 2.50E+00 9.50E+00 TM 20 L13274-03 11/20/2007 Cs-137 2.70E+00 2.60E+00 8.70E+00 TM 20 L13274-03 11/20/2007 Fe-59 1.30E+00 5. 1OE+00 1.80E+01 TM 20 L13274-03 11/20/2007 1-131 8.50E+00 4.30E+00 1.40E+01 TM 20 L13274-03 11/20/2007 1-131 4.30E-01 2.80E-01 8.20E-01 TM 20 L13274-03 11/20/2007 K-40 1.36E+03 8.20E+01 1.00E+02 TM 20 L13274-03 11/20/2007 La-140 7.70E+00 3.90E+00 1.20E+01 TM 20 L13274-03 11/20/2007 Mn-54 4.1OE+00 1.90E+00 6.1OE+00 TM 20 L13274-03 11/20/2007 Nb-95 1.30E+00 2.50E+00 8.70E+00 TM 20 L13274-03 11/20/2007 Ru-103 -3.OOE+00 1.90E+00 7.70E+00 TM 20 L13274-03 11/20/2007 Ru-106 -1.30E+01 1.70E+01 6.70E+01 TM 20 L13274-03 11/20/2007 Sb-124 -7.OOE-01 4.30E+00 1.80E+01 TM 20 L13274-03 11/20/2007 Sb-125 -8.80E+00 5.50E+00 2.20E+01 TM 20 L13274-03 11/20/2007 Se-75 -3.20E+00 2.30E+00 8.60E+00 TM 20 L13274-03 11/20/2007 Zn-65 -6.40E+00 5.70E+00 2.20E+01 TM 20 L13274-03 11/20/2007 Zr-95 6.OOE-01 3.40E+00 1.30E+01 TM 20 L13400-03 12/19/2007 AcTh-228 -5.60E+00 6.50E+00 2.20E+01 TM 20 L13400-03 12/19/2007 Ag-108m 1.09E+00 8.30E-01 2.70E+00 TM 20 L13400-03 12/19/2007 Ag-110in -3.OOE-01 1.60E+00 5.50E+00 TM 20 L13400-03 12/19/2007 Ba-140 -4.60E+00 3.20E+00 1.20E+01 TM 20 L13400-03 12/19/2007 Be-7 -1.47E+01 9.60E+00 3.40E+01 TM 20 L13400-03 12/19/2007 Ce-141 7.OOE-01 1.70E+00 5.60E+00 TM 20 L13400-03 12/19/2007 Ce-144 2.OOE+00 5. 1OE+00 1.70E+01 TM 20 L13400-03 12/19/2007 Co-57 3.50E-01 6.60E-01 2.20E+00 TM 20 L13400-03 12/19/2007 Co-58 -1.00E+00 1.30E+00 4.50E+00 TM 20 L13400-03 12/19/2007 Co-60 -2.80E+00 1.40E+00 5.20E+00 TM 20 L13400-03 12/19/2007 Cr-51 -3.OOE+00 1.00E+01 3.50E+01 TM 20 L13400-03 12/19/2007 Cs-134 0.OOE+00 1.30E+00 4.50E+00 TM 20 L13400-03 12/19/2007 Cs-137 2.OOE-01 1.00E+00 3.50E+00 TM 20 L13400-03 12/19/2007 Fe-59 2.OOE-01 2.90E+00 1.00E+01 TM 20 L13400-03 12/19/2007 1-131 1.40E-02 9.90E-02 5.70E-01 TM 20 LI13400-03 12/19/2007 1-131 9.40E+00 4. IOE+00 1.30E+01 TM 20 L13400-03 12/19/2007 K-40 1.32E+03 4.30E+01 7.70E+01 TM 20 L13400-03 12/19/2007 La-140 -4.60E+00 3.20E+00 1.20E+01 TM 20 L13400-03 12/19/2007 Mn-54 -1.60E+00 1.1OE+00 4.1OE+00 TM 20 L13400-03 12/19/2007 Nb-95 3.OOE-01 1.50E+00 5.30E+00 TM 20 L13400-03 12/19/2007 Ru-103 -2.20E+00 1.30E+00 4.60E+00 TM 20 L13400-03 12/19/2007 Ru-106 1.64E+01 9.OOE+00 2.90E+01 TM 20 L13400-03 12/19/2007 Sb-124 -2.90E+00 3.OOE+00 1.1OE+OI TM 20 L13400-03 12/19/2007 Sb-125 -3.20E+00 2.40E+00 8.60E+00 TM 20 L13400-03 12/19/2007 Se-75 2.10E+00 1.00E+00 3.50E+00 TM 20 L13400-03 12/19/2007 Zn-65 -3.30E+00 2.80E+00 1.00E+01 TM 20 L13400-03 12/19/2007 Zr-95 -1.60E+00 2.20E+00 7.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-181-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM LI 1940-04 1/17/2007 AcTh-228 1.50E+00 6.40E+00 2.30E+0I TM Li 1940-04 1/17/2007 Ag-108m -1.60E+00 1.40E+00 5.20E+00 TM Li 1940-04 1/17/2007 Ag-110m 9.OOE-01 2.40E+00 8.40E+00 TM Li 1940-04 1/17/2007 Ba-140 4.1OE+00 2.40E+00 7.60E+00 TM LI 1940-04 1/17/2007 Be-7 1.00E+00 1.40E+01 4.80E+01 TM LI 1940-04 1/17/2007 Ce-141 -3.90E+00 2.60E+00 9.50E+00 TM LI 1940-04 1/17/2007 Ce-144 -1.70E+00 9.70E+00 3.40E+-0I TM Li 1940-04 1/17/2007 Co-57 1.1OE+00 1.30E+00 4.20E+00 TM Li1940-04 1/17/2007 Co-58 -2.1 OE+00 1.80E+00 6.70E+00 TM LI 1940-04 1/17/2007 Co-60 8.OOE-01 2.10E+00 7.30E+00 TM LI 1940-04 1/17/2007 Cr-51 1.40E+OI 1.60E+01 5.30E+01 TM Li 1940-04 1/17/2007 Cs-134 -3.50E+00 1.80E+00 7.30E+00 TM Ll 1940-04 1/17/2007 Cs-137 -7.OOE-01 1.70E+00 6.30E+00 TM Li 1940-04 1/17/2007 Fe-59 3.70E+00 4.50E+00 1.60E+01 TM Li1940-04 1/17/2007 1-131 -6.40E-02 1.10E-02 5.30E-01 TM Li 1940-04 1/17/2007 1-131 3.OOE-01 3.30E+00 1.10E+01 TM Li 1940-04 1/17/2007 K-40 1,36E+03 6.80E+01 1.OOE+02 TM LI 1940-04 1/17/2007 La-140 4.70E+00 2.70E+00 8.70E+00 TM Li 1940-04 1/17/2007 Mn-54 -2.OOE-01 1.60E+00 5.90E+00 TM LI 1940-04 1/17/2007 Nb-95 1.40E+00 2.OOE+00 7.OOE+00 TM LI 1940-04 1/17/2007 Ru-103 -2.80E+00 1.80E+00 6.90E+00 TM Li 1940-04 1/17/2007 Ru-106 1.90E+01 1.70E+01 5.90E+01 TM LI 1940-04 1/17/2007 Sb-124 -4,50E+00 3.90E+00 1.60E+01 TM Li 1940-04 1/17/2007 Sb-125 -6.40E+00 3.90E+00 1.50E+01 TM Li 1940-04 1/17/2007 Se-75 4.OOE-01 2.1OE+00 7.40E+00 TM LI 1940-04 1/17/2007 Zn-65 6.OOE+00 3.90E+00 1.30E+01 TM Li 1940-04 1/17/2007 Zr-95 7.50E+00 3.OOE+00 9.30E+00 TM L12034-04 2/13/2007 AcTh-228 5.90E+00 8.50E+00 3.OOE+01 TM L12034-04 2/13/2007 Ag-108m 4.OOE-01 1.60E+00 5.70E+00 TM L12034-04 2/13/2007 Ag-110m -3.80E+00 2.90E+00 1.20E+01 TM L12034-04 2/13/2007 Ba-140 7.OOE-01 3.70E+00 1.40E+01 TM L12034-04 2/13/2007 Be-7 -2.OOE+00 1.90E+01 6.70E+01 TM L12034-04 2/13/2007 Ce-141 -9.80E+00 3.1OE+00 1.20E+01 TM L12034-04 2/13/2007 Ce-144 -2.OOE+00 1.20E+01 4.10E+01 TM L12034-04 2/13/2007 Co-57 2.90E+00 1.60E+00 5.20E+00 TM L12034-04 2/13/2007 Co-58 1.50E+00 2.40E+00 8.40E+00 TM L12034-04 2/13/2007 Co-60 -8.OOE-01 2.40E+00 9.30E+00 TM L12034-04 2/13/2007 Cr-51 7.OOE+00 1.90E+01 6.70E+01 TM L12034-04 2/13/2007 Cs-134 -1.30E+00 2.60E+00 9.60E+00 TM L12034-04 2/13/2007 Cs-137 2.40E+00 2.10E+00 7.OOE+00 TM L12034-04 2/13/2007 Fe-59 -2.OOE+00 5.1OE+00 1.90E+01 TM L12034-04 2/13/2007 1-131 -3.OOE-02 1.40E-01 9.OOE-01 TM L12034-04 2/13/2007 1-131 -1.80E+00 4.50E+00 1.60E+01 TM L12034-04 2/13/2007 K-40 1.36E+03 8.1OE+0I 1.20E+02 TM L12034-04 2/13/2007 La-140 8.OOE-01 4.20E+00 1.60E+01 TM L12034-04 2/13/2007 Mn-54 -3.50E+00 2.20E+00 8.70E+00 TM L12034-04 2/13/2007 Nb-95 -I.IOE+00 2.60E+00 9.70E+00 TM L12034-04 2/13/2007 Ru-103 1.70E+00 2.40E+00 8.30E+00 TM L12034-04 2/13/2007 Ru-106 -1.60E+01 2.20E+01 8.OOE+01 TM L12034-04 2/13/2007 Sb-124 - 1.1 OE+00 4.60E+00 1.90E+OI TM L12034-04 2/13/2007 Sb-125 -4.70E+00 5.40E+00 2.OOE+01 TM L12034-04 2/13/2007 Se-75 1.50E+00 2.60E+00 8.90E+00 TM L12034-04 2/13/2007 Zn-65 -1.02E+01 5.90E+00 2.30E+0 1 TM L12034-04 2/13/2007 Zr-95 -2.1 OE+00 3.70E+00 1.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-182-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCiikg)

TM L12344-04 4/25/2007 AcTh-228 4.50E+00 8.30E+00 2.90E+01 TM L12344-04 4/25/2007 Ag-108m 8.OOE-01 1.60E+00 5.60E+00 TM L12344-04 4/25/2007 Ag-ll0m 4.OOE-01 3.OOE+00 1.1OE+01 TM L12344-04 4/25/2007 Ba-140 -2.70E+00 3.20E+00 1.30E+01 TM L12344-04 4/25/2007 Be-7 1.40E+01 1.50E+01 5.OOE+01 TM L12344-04 4/25/2007 Ce-141 -3.20E+00 2.90E+00 1.00E+01 TM L12344-04 4/25/2007 Ce-144 2.OOE+00 1.1OE+OI 3.90E+01 TM L12344-04 4/25/2007 Co-57 1.80E+00 1.50E+00 5.OOE+00 TM L12344-04 4/25/2007 Co-58 -1.10E+00 1.80E+00 7.OOE+00 TM L12344-04 4/25/2007 Co-60 4.OOE-01 2.40E+00 8.80E+00 TM L12344-04 4/25/2007 Cr-51 3.20E+01 1.90E+01 6.10E+01 TM L12344-04 4/25/2007 Cs-134 -3.OOE-01 2.OOE+00 7.60E+00 TM L12344-04 4/25/2007 Cs-137 2.60E+00 2.40E+00 8.30E+00 TM L12344-04 4/25/2007 Fe-59 -1.70E+00 5.40E+00 2.OOE+01 TM L12344-04 4/25/2007 1-131 1.30E-01 2.10E-01 9.30E-01 TM L12344-04 4/25/2007 1-131 2.50E+00 3.80E+00 1.30E+01 TM L12344-04 4/25/2007 K-40 1.66E+03 8.40E+01 9.80E+01 TM L12344-04 4/25/2007 La-140 -3.10E+00 3.70E+00 l50E+01 TM L12344-04 4/25/2007 Mn-54 1.60E+00 1.80E+00 6.1OE+00 TM L12344-04 4/25/2007 Nb-95 -4.20E+00 2.40E+00 9.60E+00 TM L12344-04 4/25/2007 Ru-103 -I.80E+00 2. 1OE+00 7.80E+00 TM L12344-04 4/25/2007 Ru-I106 2.70E+01 1.80E+01 5.90E+01 TM L12344-04 4/25/2007 Sb-124 -1.54E+01 5.60E+00 2.50E+01 TM L12344-04 4/25/2007 Sb-125 -7.60E+00 4.70E+00 1.80E+01 TM L12344-04 4/25/2007 Se-75 -1.40E+00 2.20E+00 8.1OE+00 TM L12344-04 4/25/2007 Zn-65 -4.60E+00 5.50E+00 2.1OE+01 TM L12344-04 4/25/2007 Zr-95 -6.40E+00 3.80E+00 1.5OE+01 TM L12403-04 5/9/2007 AcTh-228 2.OOE+00 1.00E+01 3.80E+01 TM L12403-04 5/9/2007 Ag-108m -1.90E+00 2.OOE+00 7.40E+00 TM L12403-04 5/9/2007 Ag-il0mn 5.30E+00 2.90E+00 9.20E+00 TM L12403-04 5/9/2007 Ba-140 4.20E+00 3.30E+00 1.10E+01 TM L12403-04 5/9/2007 Be-7 2.OOE+01 1.70E+01 5.80E+01 TM L12403-04 5/9/2007 Ce-141 -I.30E+00 3.30E+00 1.10E+01 TM L12403-04 5/9/2007 Ce-144 -7.OOE+00 1.20E+01 4.20E+01 TM L12403-04 5/9/2007 Co-57 8.OOE-01 1.50E+00 5.1OE+00 TM L12403-04 5/9/2007 Co-58 2.70E+00 2.80E+00 9.60E+00 TM L12403-04 5/9/2007 Co-60 -1.50E+00 3.OOE+00 1.20E+01 TM L12403-04 5/9/2007 Cr-51 -1.10E+01 1.80E+01 6.70E+01 TM L12403-04 5/9/2007 Cs-134 2.60E+00 2.80E+00 9.70E+00 TM L12403-04 5/9/2007 Cs-137 1.60E+00 2.80E+00 9.80E+00 TM L12403-04 5/9/2007 Fe-59 1.70E+00 6.40E+00 2.30E+01 TM L12403-04 5/9/2007 1-131 -1.08E-01 1.60E-02 8.50E-01 TM L12403-04 5/9/2007 1-131 1.90E+00 3.90E+00 1.40E+01 TM L12403-04 5/9/2007 K-40 1.73E+03 1.00E+02 1.30E+02 TM L12403-04 5/9/2007 La-140 4.90E+00 3.80E+00 1.30E+01 TM L12403-04 5/9/2007 Mn-54 -2.50E+00 2.60E+00 1.00E+01 TM L12403-04 5/9/2007 Nb-95 2.80E+00 2.80E+00 9.60E+00 TM L12403-04 5/9/2007 Ru-103 0.OOE+00 2.20E+00 8.10E+00 TM L12403-04 5/9/2007 Ru-106 -2.40E+01 2.20E+01 8.50E+01 TM L12403-04 5/9/2007 Sb-124 1.40E+00 5.90E+00 2.30E+01 TM L12403-04 5/9/2007 Sb-125 4.50E+00 5.80E+00 2.OOE+01 TM L12403-04 5/9/2007 Se-75 4.OOE-01 2.40E+00 8.60E+00 TM L12403-04 5/9/2007 Zn-65 -6.20E+00 5.40E+00 2.20E+01 TM L12403-04 5/9/2007 Zr-95 1.1OE+00 4.30E+00 1.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-183-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 24 L12520-04 6/6/2007 AcTh-228 -7.80E+00 9.30E+00 3.60E+01 TM 24 L12520-04 6/6/2007 Ag-108m -2.OOE+00 1.90E+00 7.20E+00 TM 24 L12520-04 6/6/2007 Ag-0mrn -5.30E+00 3.50E+00 1.40E+01 TM 24 L12520-04 6/6/2007 Ba-140 -3.40E+00 3.40E+00 1.50E+01 TM 24 L12520-04 6/6/2007 Be-7 -3.OOE+00 2.1OE+0I 7.60E+01 TM 24 L12520-04 6/6/2007 Ce- 141 1.40E+00 3.80E+00 1.30E+01 TM 24 L12520-04 6/6/2007 Ce-144 9.OOE+00 1.40E+01 4.70E+01 TM 24 L12520-04 6/6/2007 Co-57 -1.00E-01 1.70E+00 6.OOE+00 TM 24 L12520-04 6/6/2007 Co-58 1.90E+00 2.60E+00 9.20E+00 TM 24 L12520-04 6/6/2007 Co-60 -4.40E+00 2.80E+00 1.20E+01 TM 24 L12520-04 6/6/2007 Cr-51 -6.OOE+01 2.20E+01 8.80E+01 TM 24 L12520-04 6/6/2007 Cs-134 -8.OOE-01 2.80E+00 1.1 OE+0 1 TM 24 L12520-04 6/6/2007 Cs-137 2.50E+00 2.70E+00 9.40E+00 TM 24 L12520-04 6/6/2007 Fe-59 1.70E+00 5.80E+00 2.1OE+01 TM 24 L12520-04 6/6/2007 1-131 -5.80E+00 4.80E+00 1.80E+01 TM 24 L12520-04 6/6/2007 1-131 1.IOE-01 1.40E-01 5.60E-0 I TM 24 L12520-04 6/6/2007 K-40 6.40E+02 1.00E+02 3.OOE+02 TM 24 L12520-04 6/6/2007 La-140 -3.90E+00 3.90E+00 1.70E+01 TM 24 L12520-04 6/6/2007 Mn-54 3.30E+00 2.30E+00 7.60E+00 TM 24 L12520-04 6/6/2007 Nb-95 2.40E+00 3.1OE+00 1.10E+01 TM 24 L12520-04 6/6/2007 Ru-103 -1.00E-01 2.60E+00 9.40E+00 TM 24 L12520-04 6/6/2007 Ru-106 2.90E+OI 2.OOE+01 6.70E+01 TM 24 L12520-04 6/6/2007 Sb-124 4.OOE+00 4.40E+00 1.60E+01 TM 24 L12520-04 6/6/2007 Sb-125 2.30E+00 6.30E+00 2.20E+01 TM 24 L12520-04 6/6/2007 Se-75 8.OOE-01 3.1OE+00 1.1OE+01 TM 24 L12520-04 6/6/2007 Zn-65 1.20E+00 6.40E+00 2.30E+01 TM 24 L12520-04 6/6/2007 Zr-95 -2.OOE+00 5.OOE+00 1.90E+01 TM 24 L12580-04 6/20/2007 AcTh-228 9.30E+00 8.20E+00 2.80E+01 TM 24 L12580-04 6/20/2007 Ag-108m 0.OOE+00 1.30E+00 4.60E+00 TM 24 L12580-04 6/20/2007 Ag-il0m -2.60E+00 2.50E+00 9.30E+00 TM 24 L12580-04 6/20/2007 Ba-140 2.90E+00 3.70E+00 1.30E+01 TM 24 L12580-04 6/20/2007 Be-7 -1.60E+01 1.30E+01 5.OOE+01 TM 24 L12580-04 6/20/2007 Ce-141 -2.70E+00 2.60E+00 9.OOE+00 TM 24 L12580-04 6/20/2007 Ce- 144 -l.O0E-01 7.70E+00 2.70E+01 TM 24 L12580-04 6/20/2007 Co-57 - 1.IOE+00 1.00E+00 3.60E+00 TM 24 L12580-04 6/20/2007 Co-58 -1.00E-01 1.50E+00 5.40E+00 TM 24 L12580-04 6/20/2007 Co-60 3.50E+00 1.90E+00 6.1OE+00 TM 24 L12580-04 6/20/2007 Cr-51 -8.OOE+00 1.50E+01 5.30E+01 TM 24 L12580-04 6/20/2007 Cs-134 3.70E+00 1.90E+00 6.1OE+00 TM 24 L12580-04 6/20/2007 Cs-137 -6.OOE-01 1.80E+00 6.60E+00 TM 24 L12580-04 6/20/2007 Fe-59 3.40E+00 4.90E+00 1.70E+01 TM 24 L12580-04 6/20/2007 1-131 -1.90E+00 4.50E+00 1.60E+01 TM 24 L12580-04 6/20/2007 1-131 1.1OE-01 1.70E-01 7.30E-01 TM 24 L12580-04 6/20/2007 K-40 1.69E+03 7.30E+01 9.60E+01 TM 24 L12580-04 6/20/2007 La-140 3.30E+00 4.30E+00 1.50E+01 TM 24 L12580-04 6/20/2007 Mn-54 -3.30E+00 1.80E+00 6.90E+00 TM 24 L12580-04 6/20/2007 Nb-95 -1.40E+00 1.80E+00 6.90E+00 TM 24 L12580-04 6/20/2007 Ru-103 5.OOE-01 1.90E+00 6.50E+00 TM 24 L12580-04 6/20/2007 Ru-106 -6.OOE+00 1.60E+01 5.80E+01 TM 24 L12580-04 6/20/2007 Sb-124 -8.OOE-01 4.50E+00 1.70E+01 TM 24 L12580-04 6/20/2007 Sb-125 -2.60E+00 4. 1OE+00 1.50E+01 TM 24 L12580-04 6/20/2007 Se-75 -1.10E+00 1.60E+00 5.80E+00 TM 24 L12580-04 6/20/2007 Zn-65 3.20E+00 4.30E+00 1.50E+01 TM 24 L12580-04 6/20/2007 Zr-95 -4.90E+00 3.OOE+00 1.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-184-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 24 L12652-04 7/3/2007 AcTh-228 -8.60E+00 5.90E+00 2.20E+01 TM 24 L12652-04 7/3/2007 Ag- 108m -4.OOE-01 1.10E+00 3.70E+00 TM 24 L12652-04 7/3/2007 Ag-ll0m 1.00E+00 1.90E+00 6.50E+00 TM 24 L12652-04 7/3/2007 Ba-140 1.60E+00 2.90E+00 1.00E+01 TM 24 L12652-04 7/3/2007 Be-7 -9.OOE+00 1.30E+01 4.70E+01 TM 24 L12652-04 7/3/2007 Ce-141 2.70E+00 2.20E+00 7.20E+00 TM 24 L12652-04 7/3/2007 Ce-144 8.OOE-01 6.90E+00 2.40E+0 I TM 24 L12652-04 7/3/2007 Co-57 5.20E-01 9.40E-01 3.20E+00 TM 24 L12652-04 7/3/2007 Co-58 2.20E+00 1.50E+00 5.OOE+00 TM 24 L12652-04 7/3/2007 Co-60 7.OOE-01 1.40E+00 4.80E+00 TM 24 L12652-04 7/3/2007 Cr-51 2.60E+01 1.50E+01 4.90E+01 TM 24 L12652-04 7/3/2007 Cs-134 -1.50E+00 1.50E+00 5.60E+00 TM 24 L12652-04 7/3/2007 Cs-137 4.OOE-01 1.30E+00 4.60E+00 TM 24 L12652-04 7/3/2007 Fe-59 8.50E+00 3.60E+00 1.20E+01 TM 24 L12652-04 7/3/2007 1-131 3.OOE-02 1.20E-01 6.90E-0 1 TM 24 L12652-04 7/3/2007 1-131 3.20E+00 5.40E+00 1.80E+01 TM 24 L12652-04 7/3/2007 K-40 1.64E+03 5.30E+01 7.1OE+01 TM 24 L12652-04 7/3/2007 La-140 1.80E+00 3.40E+00 1.20E+01 TM 24 L12652-04 7/3/2007 Mn-54 -9.00E-01 1.40E+00 5.1OE+00 TM 24 L12652-04 7/3/2007 Nb-95 4.OOE-01 1.90E+00 6.40E+00 TM 24 L12652-04 7/3/2007 Ru-103 -2.70E+00 1.70E+00 6.30E+00 TM 24 L12652-04 7/3/2007 Ru-106 -1.30E+01 1.30E+01 4.70E+0 1 TM 24 L12652-04 7/3/2007 Sb-124 -2.20E+00 2.60E+00 1.00E+01 TM 24 L12652-04 7/3/2007 Sb-125 -2.OOE-01 3.40E+00 1.20E+01 TM 24 L12652-04 7/3/2007 Se-75 0.OOE+00 1.70E+00 5.90E+00 TM 24 L12652-04 7/3/2007 Zn-65 -1.70E+00 3.50E+00 1.30E+01 TM 24 L12652-04 7/3/2007 Zr-95 -1.30E+00 2.70E+00 9.50E+00 TM 24 L12698-04 7/18/2007 AcTh-228 -1.20E+00 8.60E+00 3.30E+01 TM 24 L12698-04 7/18/2007 Ag- 108m -1.10E+00 1.80E+00 6.80E+00 TM 24 L12698-04 7/18/2007 Ag-110in -2.90E+00 2.90E+00 1.20E+01 TM 24 L12698-04 7/18/2007 Ba-140 2.OOE+00 3.20E+00 1.20E+01 TM 24 L12698-04 7/18/2007 Be-7 3.20E+01 2.OOE+01 6.60E+01 TM 24 L12698-04 7/18/2007 Ce-141 -8.80E+00 4.OOE+00 1.50E+01 TM 24 L12698-04 7/18/2007 Ce-144 -2.OOE+01 1.30E+01 4.70E+01 TM 24 L12698-04 7/18/2007 Co-57 1.80E+00 1.60E+00 5.30E+00 TM 24 L12698-04 7/18/2007 Co-58 -5.1 OE+00 2.80E+00 1.1OE+01 TM 24 L12698-04 7/18/2007 Co-60 -2.80E+00 2.20E+00 9.30E+00 TM 24 L12698-04 7/18/2007 Cr-51 -2.50E+01 2.30E+01 8.70E+01 TM 24 L12698-04 7/18/2007 Cs-134 -3.OOE+00 2.40E+00 9.80E+00 TM 24 L12698-04 7/18/2007 Cs-137 -1.10E+00 2.10E+00 8.OOE+00 TM 24 L12698-04 7/18/2007 Fe-59 5.OOE+00 6.10E+00 2.1 OE+0 1 TM 24 L12698-04 7/18/2007 1-131 4.30E-01 1.90E-01 4.60E-01 TM 24 L12698-04 7/18/2007 1-131 -9.20E+00 7.OOE+00 2.60E+01 TM 24 L12698-04 7/18/2007 K-40 1.73E+03 9.50E+01 1.20E+02 A TM 24 L12698-04 7/18/2007 La-140 2.40E+00 3.70E+00 1.40E+01 TM 24 L12698-04 7/18/2007 Mn-54 -7.OOE-01 2.40E+00 8.90E+00 TM 24 L12698-04 7/18/2007 Nb-95 -1.60E+00 3.20E+00 1.20E+01 TM 24 L12698-04 7/18/2007 Ru-103 2.40E+00 2.90E+00 1.00E+01 TM 24 L12698-04 7/18/2007 Ru-106 -5.OOE+00 2.OOE+01 7.50E+01 TM 24 L12698-04 7/18/2007 Sb-124 -4.OOE+00 5.80E+00 2.40E+01 TM 24 L12698-04 7/18/2007 Sb-125 -4.70E+00 6.OOE+00 2.20E+01 TM 24 L12698-04 7/18/2007 Se-75 -3.30E+00 2.50E+00 9.50E+00 TM 24 L12698-04 7/18/2007 Zn-65 -1.58E+01 6.40E+00 2.60E+0 1 TM 24 L12698-04 7/18/2007 Zr-95 0.OOE+00 4.20E+00 1.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-185-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 24 L12771-04 8/1/2007 AcTh-228 -1.02E+01 9.60E+00 3.70E+01 TM 24 L12771-04 8/1/2007 Ag-108m 3.70E+00 1.80E+00 5.90E+00 TM 24 L12771-04 8/1/2007 Ag-110m -2.70E+00 3.70E+00 1.40E+t01 TM 24 L12771-04 8/1/2007 Ba-140 -2.OOE+00 3.50E+00 1.40E+01 TM 24 L12771-04 8/1/2007 Be-7 3.1OE+-i01 1.80E+01 5.80E+01 TM 24 L12771-04 8/1/2007 Ce-141 2.30E+00 3. 1OE+00 1.1OE+0lI TM 24 L12771-04 8/1/2007 Ce-144 -8.OOE+00 1.10E+01 3.90E+01 TM 24 L12771-04 8/1/2007 Co-57 -5.OOE-01 1.50E+00 5.20E+00 TM 24 L12771-04 8/1/2007 Co-58 -1.80E+00 2.60E+00 9.80E+00 TM 24 L12771-04 8/1/2007 Co-60 3.1OE+00 3. 1OE+00 1.1OE-OI-0 TM 24 L12771-04 8/1/2007 Cr-51 3.OOE+00 1.70E+01 5.90E+01 TM 24 L12771-04 8/1/2007 Cs-134 -8.OOE-01 2.70E+00 1.OOE+01 TM 24 L12771-04 8/1/2007 Cs-137 5.40E+00 2.20E+00 6.80E+00 TM 24 L12771-04 8/1/2007 Fe-59 -8.40E+00 5.60E+00 2.20E+01 TM 24 L12771-04 8/1/2007 1-131 -1.60E+00 3.30E+00 1.20E+01 TM 24 L12771-04 8/1/2007 1-131 I.1OE-01 1.80E-01 7.70E-01 TM 24 L12771-04 8/1/2007 K-40 1.78E+03 9.80E+01 1.30E+02 TM 24 L12771-04 8/1/2007 La-140 -2.30E+00 4.OOE+00 1.60E+01 TM 24 L12771-04 8/1/2007 Mn-54 6.OOE-01 2.40E+00 8.60E+/-00 TM 24 L12771-04 8/1/2007 Nb-95 -1.80E+00 2.60E+00 9.90E+00 TM 24 L12771-04 8/1/2007 Ru-103 -2.70E+00 2.20E+00 8.40E+00 TM 24 L12771-04 8/1/2007 Ru-106 -5.OOE+00 2.1OE+01 7.50E+01 TM 24 L12771-04 8/1/2007 Sb-124 -6.30E+00 6.OOE+00 2.50E+01 TM 24 L12771-04 8/1/2007 Sb-125 6.OOE-01 5.60E+00 2.OOE+01 TM 24 L12771-04 8/1/2007 Se-75 1.70E+00 2.30E+00 7.90E+00 TM 24 L12771-04 8/1/2007 Zn-65 -1.60E+00 6.70E+00 2.40E+0 1 TM 24 L12771-04 8/1/2007 Zr-95 1.90E+00 4.60E+00 1.60E+01 TM 24 L12840-05 8/15/2007 AcTh-228 -4.30E+00 8.20E+00 2.90E+01 TM 24 L12840-05 8/15/2007 Ag-108m -1.30E+00 1.30E+00 4.70E+00 TM 24 L12840-05 8/15/2007 Ag-110m -3.40E+00 2.50E+00 9.50E+00 TM 24 L12840-05 8/15/2007 Ba-140 -3.50E+00 2.40E+00 1.OOE+01 TM 24 L12840-05 8/15/2007 Be-7 5.OOE+00 1.40E+01 4.80E+01 TM 24 L12840-05 8/15/2007 Ce-141 -1.90E+00 2.30E+00 8.OOE+00 TM 24 L12840-05 8/15/2007 Ce-144 1.20E+01 8.10E+00 2.70E+01 TM 24 L12840-05 8/15/2007 Co-57 -6.OOE-01 1.00E+00 3.50E+00 TM 24 L12840-05 8/15/2007 Co-58 6.OOE-01 1.70E+00 6.OOE+00 TM 24 L12840-05 8/15/2007 Co-60 2.50E+00 2.OOE+00 6.80E+00 TM 24 L12840-05 8/15/2007 Cr-51 -7.OOE+00 1.40E+01 5.OOE+01 TM 24 L12840-05 8/15/2007 Cs-134 1.00E-01 1.80E+00 6.50E+00 TM 24 L12840-05 8/15/2007 Cs-137 3.20E+00 1.70E+00 5.70E+00 TM 24 L12840-05 8/15/2007 Fe-59 -5.40E+00 4.30E+00 1.60E+l01 TM 24 L12840-05 8/15/2007 1-131 -4.OOE+00 3.1OE+00 1.IOE+01 TM 24 L12840-05 8/15/2007 1-131 -8.10E-02 1.30E-02 4.OOE-01 TM 24 L12840-05 8/15/2007 K-40 1.77E+03 7.40E+01 9.40E+01 TM 24 L12840-05 8/15/2007 La-140 -4.1 OE+00 2.80E+00 1.20E+l01 TM 24 L12840-05 8/15/2007 Mn-54 4.OOE-01 1.50E+00 5.40E+00 TM 24 L12840-05 8/15/2007 Nb-95 -7.OOE-01 1.70E+00 6.30E+00 TM 24 L12840-05 8/15/2007 Ru-103 -9.OOE-01 1.70E+00 6.OOE+/-00 TM 24 L12840-05 8/15/2007 Ru-106 -5.OOE+00 1.60E+01 5.60E+01 TM 24 L12840-05 8/15/2007 Sb-124 -2.90E+00 4.OOE+00 1.60E+01 TM 24 L12840-05 8/15/2007 Sb-125 -6.30E+00 4.1OE+00 1.50E+01 TM 24 L12840-05 8/15/2007 Se-75 -2.1 OE+00 1.60E+00 6.OOE+00 TM 24 L12840-05 8/15/2007 Zn-65 5.OOE-01 4.40E+00 1.50E+01 TM 24 L12840-05 8/15/2007 Zr-95 -3.10E+00 2.90E+00 1.1OE+0lI

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-186-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 24 L12964-04 9/12/2007 AcTh-228 1.39E+01 9.10E+00 3.OOE+01 TM 24 L12964-04 9/12/2007 Ag-108m -8.OOE-01 1.70E+00 6.1OE+00 TM 24 L12964-04 9/12/2007 Ag-lr0m 3.OOE+00 2.80]E+00 9.70E+00 TM 24 L12964-04 9/12/2007 Ba-140 -2.90E+00 2.40E+00 1.10E+01 TM 24 L12964-04 9/12/2007 Be-7 -5.OOE+00 1.50E+01 5.50E+01 TM 24 L12964-04 9/12/2007 Ce-141 -6.OOE-01 3.20E+00 1.1OE+01 TM 24 L12964-04 9/12/2007 Ce-144 1.00E+01 1.20E+01 4.OOE+01 TM 24 L12964-04 9/12/2007 Co-57 -1.30E+00 1.40E+00 5.OOE+00 TM 24 L12964-04 9/12/2007 Co-58 -1.10E+00 2.OOE+00 7.50E+00 TM 24 L12964-04 9/12/2007 Co-60 1.50E+00 2.1OE+00 7.40E+00 TM 24 L12964-04 9/12/2007 Cr-51 -1.60E+01 1.90E+01 6.80E+01 TM 24 L12964-04 9/12/2007 Cs-134 2.60E+00 2.1OE+00 7.20E+00 TM 24 L12964-04 9/12/2007 Cs-137 4.60E+00 2.30E+00 7.50E+00 TM 24 L12964-04 9/12/2007 Fe-59 -1.10E+00 4.50E+00 1.70E+01 TM 24 L12964-04 9/12/2007 1-131 -9.00E-03 9.40E-02 5.70E-01 TM 24 L12964-04 9/12/2007 1-131 5.50E+00 3.40E+00 1.1 OE+0 I TM 24 L12964-04 9/12/2007 K-40 1.79E+03 8.70E+01 1.1OE+02 TM 24 L12964-04 9/12/2007 La-140 -3.40E+00 2.70E+00 1.20E+01 TM 24 L12964-04 9/12/2007 Mn-54 -2.60E+00 2.OOE+00 7.90E+00 TM 24 L12964-04 9/12/2007 Nb-95 -5.90E+00 2.40E+00 9.80E+00 TM 24 L12964-04 9/12/2007 Ru-103 -1.70E+00 2.10E+00 7.80E+00 TM 24 L12964-04 9/12/2007 Ru-106 -4.OOE+01 2.OOE+01 7.70E+01 TM 24 L12964-04 9/12/2007 Sb-124 9.OOE-01 5.1OE+00 1.90E+01 TM 24 L12964-04 9/12/2007 Sb-125 4.50E+00 4.70E+00 1.60E+01 TM 24 L12964-04 9/12/2007 Se-75 -3.10E+00 2.20E+00 8.30E+00 TM 24 L12964-04 9/12/2007 Zn-65 -7.40E+00 5.50E+00 2.1 OE+0 1 TM 24 L12964-04 9/12/2007 Zr-95 -4.20E+00 3.50E+00 1.40E+01 TM 24 L13019-04 9/26/2007 AcTh-228 9.OOE+00 9.OOE+00 3.20E+0 1 TM 24 L13019-04 9/26/2007 Ag-108m -2.OOE-01 1.80E+00 6.60E+00 TM 24 L13019-04 9/26/2007 Ag-ll0m -4.OOE-01 3.1OE+00 1.1OE+01 TM 24 L13019-04 9/26/2007 Ba-140 5.30E+00 3.1OE+00 1.00E+01 TM 24 L13019-04 9/26/2007 Be-7 -4.OOE+01 2.20E+01 8.30E+01 TM 24 L13019-04 9/26/2007 Ce-141 2.OOE-01 3.50E+00 1.20E+01 TM 24 L13019-04 9/26/2007 Ce-144 -1.50E+01 1.20E+01 4.40E+01 TM 24 L13019-04 9/26/2007 Co-57 2.OOE-01 1.50E+00 5.20E+00 TM 24 L13019-04 9/26/2007 Co-58 -9.OOE-01 2.40E+00 8.80E+00 TM 24 L13019-04 9/26/2007 Co-60 -1.60E+00 2.40E+00 9.40E+00 TM 24 L13019-04 9/26/2007 Cr-51 -2.20E+01 2.OOE+01 7.40E+0 1 TM 24 L13019-04 9/26/2007 Cs-134 -1.30E+00 2.40E+00 9.OOE+00 TM 24 L13019-04 9/26/2007 Cs-137 3.60E+00 2.20E+00 7.20E+00 TM 24 L13019-04 9/26/2007 Fe-59 -8.50E+00 5.70E+00 2.20E+01 TM 24 L13019-04 9/26/2007 1-131 -2.40E+00 4.OOE+00 1.50E+01 TM 24 L13019-04 9/26/2007 1-131 3.OOE-02 1.10E-01 5.40E-01 TM 24 L13019-04 9/26/2007 K-40 1.86E+03 9.20E+01 1.00E+02 TM 24 L13019-04 9/26/2007 La-140 6.1OE+00 3.60E+00 1.1OE+01 TM 24 L13019-04 9/26/2007 Mn-54 1.20E+00 2.40E+00 8.30E+00 TM 24 L13019-04 9/26/2007 Nb-95 -1.60E+00 2.60E+00 9.70E+00 TM 24 L13019-04 9/26/2007 Ru-103 -2.30E+00 2.60E+00 9.50E+00 TM 24 L13019-04 9/26/2007 Ru-106 -1.40E+01 2.OOE+01 7.50E+01 TM 24 L13019-04 9/26/2007 Sb-124 3.30E+00 4.80E+00 1.70E+01 TM 24 L13019-04 9/26/2007 Sb-125 3.10E+00 5.30E+00 1.80E+01 TM 24 L13019-04 9/26/2007 Se-75 -2.10E+00 2.80E+00 1.00E+01 TM 24 L13019-04 9/26/2007 Zn-65 7.30E+00 6.OOE+00 2.OOE+01 TM 24 L13019-04 9/26/2007 Zr-95 2.20E+00 4.20E+00 1.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-187-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STATION LSN DATE NUCLIDE TG L12460-01 5/22/2007 AcTh-228 -2.90E+01 4.90E+0 I 2.OOE+02 TG L12460-01 5/22/2007 Ag-108m -4.OOE+00 1.00E+01 3.90E+01 TG L12460-01 5/22/2007 Ag-li0m -2.90E+01 1.60E+01 7.80E+01 TG L12460-01 5/22/2007 Ba-140 5.30E+01 3.80E+01 1.20E+02 TG L12460-01 5/22/2007 Be-7 7.40E+02 1.90E+02 5.1OE+02 TG L12460-01 5/22/2007 Ce-141 5.OOE+00 1.50E+01 5.5OE+01 TG L12460-01 5/22/2007 Ce-144 -8.0OE+00 3.70E+01 1.40E+02 TG L12460-01 5/22/2007 Co-57 -7.OOE-01 4.80E+00 1.80E+01 TG L12460-01 5/22/2007 Co-58 1.40E+01 1.40E+01 4.90E+01 TG L12460-01 5/22/2007 Co-60 1.20E+01 1.40E+01 5.30E+01 TG L12460-01 5/22/2007 Cr-51 1.30E+02 1.20E+02 4.20E+02 TG L12460-01 5/22/2007 Cs-134 3.40E+01 1.60E+01 4.80E+01 TG L12460-01 5/22/2007 Cs-137 1.1OE+0 1 1.40E+01 4.80E+01 TG L12460-01 5/22/2007 Fe-59 0.OOE+00 3.40E+01 1.30E+02 TG L12460-01 5/22/2007 1-131 1.00E+01 1.1OE+0 I 4.1OE+01 TG L12460-01 5/22/2007 1-131 4.1OE+01 4.60E+0 1 1.60E+02 TG L12460-01 5/22/2007 K-40 3.96E+03 4.60E+02 6.40E+02 TG L12460-01 5/22/2007 La-140 6.1OE+01 4.30E+01 1.40E+02 TG L12460-01 5/22/2007 Mn-54 1.30E+01 1.30E+01 4.40E+0 1 TG L12460-01 5/22/2007 Nb-95 -8.OOE+00 1.50E+01 6.40E+01 TG L12460-01 5/22/2007 Ru- 103 1.90E+01 1.30E+01 4.20E+01 TG L12460-01 5/22/2007 Ru-106 -9.OOE+01 1.20E+02 5.OOE+02 TG L12460-01 5/22/2007 Sb-124 -1.50E+01 4.80E+01 2.OOE+02 TG L12460-01 5/22/2007 Sb-125 2.70E+01 3.40E+01 1.20E+02 TG L12460-01 5/22/2007 Se-75 -1.30E+01 1.30E+01 5.1OE+01 TG L12460-01 5/22/2007 Zn-65 4.80E+01 3.60E+01 1.20E+02 TG L12460-01 5/22/2007 Zr-95 1.00E+01 2.80E+01 1.00E+02 TG L12597-01 6/19/2007 AcTh-228 3.70E+01 4.90E+01 1.70E+02 TG L12597-01 6/19/2007 Ag-108m 5.OOE+00 1.00E+01 3.50E+01 TG L12597-01 6/19/2007 Ag-11 0m -6.OOE+00 1.50E+01 6.10E+01 TG L12597-01 6/19/2007 Ba-140 -1.93E+02 6.80E+01 3.30E+02 TG L12597-01 6/19/2007 Be-7 5.60E+02 1.50E+02 4. 1OE+02 TG L12597-01 6/19/2007 Ce- 141 -2.1OE+01 2.OOE+01 7.40E+01 TG L12597-01 6/19/2007 Ce-144 -3.90E+01 4. 1OE+01 1.50E+02 TG L12597-01 6/19/2007 Co-57 -2.90E+00 5. 1OE+00 1.90E+01 TG L12597-01 6/19/2007 Co-58 -6.OOE+00 1.50E+01 5.70E+01 TG L12597-01 6/19/2007 Co-60 6.OOE+00 1.40E+01 5.30E+01 TG L12597-01 6/19/2007 Cr-51 -5.OOE+01 1.40E+02 5.20E+02 TG L12597-01 6/19/2007 Cs-134 -1.00E+00 1.60E+01 5.90E+0 1 TG L12597-01 6/19/2007 Cs-137 1.30E+01 1.20E+01 4.OOE+01 TG L12597-01 6/19/2007 Fe-59 -3.60E+01 3.40E+01 1.40E+02 TG L12597-01 6/19/2007 1-131 1.80E+01 9.60E+01 3.50E+02 TG L12597-01 6/19/2007 1-131 6.50E+00 9.30E+00 4.20E+01 TG L12597-01 6/19/2007 K-40 3.09E+03 3.50E+02 6.40E+02 TG L12597-01 6/19/2007 La-140 -2.22E+02 7.80E+01 3.80E+02 TO L12597-01 6/19/2007 Mn-54 1.20E+01 1.30E+01 4.70E+01 TG L12597-01 6/19/2007 Nb-95 -8.OOE+00 1.90E+01 7.40E+01 TG L12597-01 6/19/2007 Ru-103 2.OOE+00 1.50E+01 5.60E+01 TG L12597-01 6/19/2007 Ru-106 0.OOE+00 1.1 OE+02 4.OOE+02 TG L12597-01 6/19/2007 Sb-124 0.OOE+00 2.70E+01 1.20E+02 TG L12597-01 6/19/2007 Sb- 125 -1.10E+01 2.80E+01 1.00E+02 TG L12597-01 6/19/2007 Se-75 2.30E+01 1.20E+01 3.90E+01 TG L12597-01 6/19/2007 Zn-65 -6.1OE+01 3.30E+01 1.40E+02 TG L12597-01 6/19/2007 Zr-95 7.OOE+00 2.80E+01 1.00E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-188-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG L12741-01 7/24/2007 AcTh-228 5.70E+01 5.1OE+0I 1.70E+02 TG L12741-01 7/24/2007 Ag-108m -8.40E+00 8.80E+00 3.40E+01 TG L12741-01 7/24/2007 Ag-110m 3.OOE+00 1.40E+01 5.20E+01 TG L12741-01 7/24/2007 Ba-140 -1.20E+01 2.60E+01 1.1OE+02 TG L12741-01 7/24/2007 Be-7 9.70E+02 1.60E+02 4.OOE+02 TG L12741-01 7/24/2007 Ce-141 4.OOE+00 1.70E+01 5.80E+01 TG L12741-01 7/24/2007 Ce-144 3.30E+01 4.80E+01 1.70E+02 TG L12741-01 7/24/2007 Co-57 5.30E+00 6.10E+00 2.1OE+01 TG L12741-01 7/24/2007 Co-58 2.OOE+00 1.1OE+01 4.20E+01 TG L12741-01 7/24/2007 Co-60 -4.OOE+00 1.20E+01 4.70E+01 TG L12741-01 7/24/2007 Cr-51 -5.OOE+01 1.1OE+02 4.OOE+02 TG L12741-01 7/24/2007 Cs-134 6.OOE+00 1.20E+01 4.50E+01 TG L12741-01 7/24/2007 Cs-137 -1.70E+01 1.00E+01 4.30E+01 TG L12741-01 7/24/2007 Fe-59 -2.80E+01 2.50E+01 1.00E+02 TG L12741-01 7/24/2007 1-131 6.60E+0 1 3.30E+01 1.10E+02 TG L12741-01 7/24/2007 1-131 5.90E+00 9.40E+00 4.1OE+01 TG L12741-01 7/24/2007 K-40 2.58E+03 3.1OE+02 6.20E+02 TG L12741-01 7/24/2007 La-140 -1.30E+01 3.00E+01 1.20E+02 TG L12741-01 7/24/2007 Mn-54 2.OOE+00 1.20E+01 4.40E+01 TG L12741-01 7/24/2007 Nb-95 -1.00E+01 1.40E+01 5.30E+01 TG L12741-01 7/24/2007 Ru-103 -1.80E+01 1.50E+01 5.70E+01 TG L12741-01 7/24/2007 Ru-106 -1.00E+01 1.10E+02 4.1OE+02 TG L12741-01 7/24/2007 Sb-124 3.70E+01 2.70E+01 9.OOE+01 TG L12741-01 7/24/2007 Sb-125 7.OOE+00 2.70E+01 9.70E+01 TG L12741-01 7/24/2007 Se-75 4.OOE+00 1.20E+01 4.20E+01 TG L12741-01 7/24/2007 Zn-65 2.40E+01 3.OOE+01 1.00E+02 TG L12741-01 7/24/2007 Zr-95 2. 1OE+01 1.80E+01 6.1OE+01 TG L12850-01 8/16/2007 AcTh-228 -2.OOE+01 4.40E+01 1.70E+02 TG L12850-01 8/16/2007 Ag-108m 2.40E+00 9.50E+00 3.40E+01 TG L12850-01 8/16/2007 Ag-110m 8.OOE+00 1.60E+01 5.90E+01 TG L12850-01 8/16/2007 Ba-140 0.OOE+00 1.80E+01 7.60E+01 TG L12850-01 8/16/2007 Be-7 1.06E+03 1.90E+02 5.1OE+02

TG L12850-01 8/16/2007 Ce-141 -5.60E+01 1.60E+01 6.50E+01 TG L12850-01 8/16/2007 Ce-144 -4.OOE+00 5.10E+01 1.80E+02 TG L12850-01 8/16/2007 Co-57 -3.40E+00 6.70E+00 2.40E+01 TG L12850-01 8/16/2007 Co-58 2.OOE+00 1.20E+01 4.50E+01 TG L12850-01 8/16/2007 Co-60 -1.80E+01 1.40E+01 5.80E+01 TG L12850-01 8/16/2007 Cr-51 -5.OOE+01 1.1OE+02 4.OOE+02 TG L12850-01 8/16/2007 Cs-134 -1.20E+01 1.20E+01 4.90E+01 TG L12850-01 8/16/2007 Cs-137 -1.30E+01 1.1OE+0I 4.40E+01 TG L12850-01 8/16/2007 Fe-59 6.OOE+00 2.90E+01 1.1OE+02 TG L12850-01 8/16/2007 1-131 -8.10E+00 8.30E+00 4.90E+01 TG L12850-01 8/16/2007 1-131 2.30E+01 3.1OE+01 1.1OE+02 TG L12850-01 8/16/2007 K-40 3.62E+03 3.60E+02 7.1OE+02 TG L12850-01 8/16/2007 La-140 0.OOE+00 2.1OE+01 8.70E+01 TG L12850-01 8/16/2007 Mn-54 6.OOE+00 1.20E+01 4.1OE+01 TG L12850-01 8/16/2007 Nb-95 2.OOE+00 1.60E+01 5.80E+01 TG L12850-01 8/16/2007 Ru-103 -4.OOE+00 1.40E+01 5.OOE+01 TG L12850-01 8/16/2007 Ru-106 -3.OOE+01 1.1OE+02 4.20E+02 TG L12850-01 8/16/2007 Sb-124 -3.OOE+01 3.20E+01 1.40E+02 TG L12850-01 8/16/2007 Sb-125 -4.OOE+01 2.60E+01 1.10E+02 TG L12850-01 8/16/2007 Se-75 3.OOE+00 1.30E+01 4.50E+01 TG L12850-01 8/16/2007 Zn-65 1.90E+01 2.1OE+01 7.40E+01 TG L12850-01 8/16/2007 Zr-95 -3.1 OE+0 1 2.20E+01 8.90E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-189-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG L13009-01 9/25/2007 AcTh-228 -1.20E+01 5.80E+01 2.1OE+02 TG L13009-01 9/25/2007 Ag-108m -1.60E+01 1.40E+01 5.30E+0I TG L13009-01 9/25/2007 Ag-110m 1.80E+01 2.1OE+0I 7.20E+01 TG L13009-01 9/25/2007 Ba-140 -7.OOE+00 2.80E+01 1.1OE+02 TG L13009-01 9/25/2007 Be-7 1.92E+03 2.40E+02 6. 1OE+02 TG L13009-01 9/25/2007 Ce-141 -3.OOE+00 2.60E+01 9.OOE+01 TG L13009-01 9/25/2007 Ce-144 -1.60E+01 7.80E+01 2.70E+02 TG L13009-01 9/25/2007 Co-57 1.05E+01 8.80E+00 2.90E+01 TG L13009-01 9/25/2007 Co-58 -1.40E+01 1.60E+01 6.1 OE+0 1 TG L13009-01 9/25/2007 Co-60 -1.20E+01 1.40E+01 5.90E+01 TG L13009-01 9/25/2007 Cr-51 -1.OOE+01 1.60E+02 5.60E+02 TG L13009-01 9/25/2007 Cs-134 5.OOE+00 1.60E+01 5.80E+01 TG L13009-01 9/25/2007 Cs-137 -8.OOE+00 1.50E+01 5.60E+01 TG L13009-01 9/25/2007 Fe-59 2.60E+01 3.OOE+01 1.00E+02 TG L13009-01 9/25/2007 1-131 -1.90E+00 8.OOE+00 4.30E+0I TG L13009-01 9/25/2007 1-131 9.20E+01 4.70E+01 1.50E+02 TG L13009-01 9/25/2007 K-40 3.85E+03 4. 1OE+02 8.30E+02 TG L13009-01 9/25/2007 La-140 -8.OOE+00 3.30E+01 1.30E+02 TG L13009-01 9/25/2007 Mn-54 6.OOE+00 1.50E+01 5.40E+01 TG L13009-01 9/25/2007 Nb-95 -2.40E+01 3.OOE+01 1.1OE+02 TG L13009-01 9/25/2007 Ru- 103 -7.OOE+00 1.80E+01 6.50E+01 TG L13009-01 9/25/2007 Ru-106 3.OOE+01 1.30E+02 4.80E+02 TG L13009-01 9/25/2007 Sb-124 -8.OOE+00 2.80E+01 1.20E+02 TG L13009-01 9/25/2007 Sb-125 1.20E+01 3.80E+01 1.40E+02 TG L13009-01 9/25/2007 Se-75 3.OOE+00 1.80E+01 6.20E+01 TG L13009-01 9/25/2007 Zn-65 2.40E+01 6.70E+01 2.40E+02 TG L13009-01 9/25/2007 Zr-95 -8.OOE+00 2.90E+01 1.1OE+02 TG L13129-01 10/22/2007 AcTh-228 -4.60E+01 5.20E+01 2.OOE+02 TG L13129-01 10/22/2007 Ag-108m 1.09E+01 9.40E+00 3.20E+01 TG L13129-01 10/22/2007 Ag-110m -3.20E+01 2.OOE+01 7.90E+01 TG L13129-01 10/22/2007 Ba-140 3.1OE+01 2.1OE+01 6.80E+01 TG L13129-01 10/22/2007 Be-7 2.58E+03 2.30E+02 5. 1OE+02 TG L13129-01 10/22/2007 Ce-141 4.70E+01 1.80E+01 5.60E+01 TG L13129-01 10/22/2007 Ce-144 -2.60E+01 6.1OE+0I 2.20E+02 TG L13129-01 10/22/2007 Co-57 1.15E+0I 7.80E+00 2.60E+01 TG L13129-01 10/22/2007 Co-58 -4.OOE+00 1.40E+01 5. 1OE+0 1 TG L13129-01 10/22/2007 Co-60 3.OOE+00 1.40E+01 5.30E+01 TG L13129-01 10/22/2007 Cr-51 9.00E+01 1.20E+02 4.20E+02 TG L13129-01 10/22/2007 Cs-134 -1.20E+01 1.40E+01 5.50E+01 TG L13129-01 10/22/2007 Cs-137 -9.0OE+00 1.20E+01 4.80E+01 TG L13129-01 10/22/2007 Fe-59 -4.90E+01 3.50E+01 1.40E+02 TG. L13129-01 10/22/2007 1-131 9.OOE-01 8.30E+00 4.20E+01 TG L13129-01 10/22/2007 1-131 -1.80E+01 2.40E+0 1 9.OOE+01 TG L13129-01 10/22/2007 K-40 3.13E+03 3.50E+02 7.30E+02 TG L13129-01 10/22/2007 La-140 3.1OE+0I 2.10E+01 6.80E+01 TG L13129-01 10/22/2007 Mn-54 2.OOE+00 1.30E+01 4.70E+01 TG L13129-01 10/22/2007 Nb-95 -2.OOE+01 1.60E+01 6.30E+0I TG L13129-01 10/22/2007 Ru-103 -1.00E+00 1.30E+01 4.80E+01 TG L13129-01 10/22/2007 Ru-106 -5.OOE+01 1.20E+02 4.30E+02 TG L13129-01 10/22/2007 Sb-124 4.30E+01 3.OOE+01 1.00E+02 TG L13129-01 10/22/2007 Sb-125 3.30E+01 3.OOE+01 1.00E+02 TG L13129-01 10/22/2007 Se-75 -9.OOE+00 1.50E+01 5.40E+01 TG L13129-01 10/22/2007 Zn-65 -2.50E+01 3.60E+01 1.40E+02 TG L13129-01 10/22/2007 Zr-95 -1.30E+01 2.40E+0I 9.OOE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-190-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG L12460-02 5/22/2007 AcTh-228 3.OOE+00 6.40E+0I 2.40E+02 TG L12460-02 5/22/2007 Ag-108m -8.OOE+00 1.00E+01 4.10E+01 TG L12460-02 5/22/2007 Ag-ill0m -3.40E+01 2.OOE+01 9.10E+01 TG L12460-02 5/22/2007 Ba-140 5.70E+01 4.OOE+01 1.30E+02 TG L12460-02 5/22/2007 Be-7 4.90E+02 2.OOE+02 6.I0E+02 TG L12460-02 5/22/2007 Ce-141 -7.OOE+00 1.70E+01 6.30E+01 TG L12460-02 5/22/2007 Ce- 144 2.50E+01 5.50E+01 1.90E+02 TG L12460-02 5/22/2007 Co-57 1.80E+00 7.40E+00 2.60E+01 TG L12460-02 5/22/2007 Co-58 1.20E+01 1.60E+01 5.70E+01 TG L12460-02 5/22/2007 Co-60 1.80E+01 1.40E+01 4.90E+01 TG L12460-02 5/22/2007 Cr-51 -2.1 OE+02 1.70E+02 6.50E+02 TG L12460-02 5/22/2007 Cs-134 -3.OOE+00 1.40E+01 5.80E+01 TG L12460-02 5/22/2007 Cs-137 2.OOE+00 1.40E+01 5.30E+01 TG L12460-02 5/22/2007 Fe-59 -1.90E+01 3.OOE+01 1.40E+02 TG L12460-02 5/22/2007 1-131 -9.OOE+00 4.OOE+01 1.60E+02 TG L12460-02 5/22/2007 1-131 9.OOE+00 .1OE+01 4.50E+01 TG L12460-02 5/22/2007 K-40 3.75E+03 4.80E+02 8.1OE+02 TG L12460-02 5/22/2007 La-140 6.50E+01 4.60E+01 1.50E+02 TG L12460-02 5/22/2007 Mn-54 5.OOE+00 1.50E+01 5.50E+01 TG L12460-02 5/22/2007 Nb-95 5.OOE+00 1.80E+01 6.80E+01 TG L12460-02 5/22/2007 Ru-103 1.80E+01 1.70E+01 5.70E+01 TG L12460-02 5/22/2007 Ru-106 -8.OOE+01 1.30E+02 5.30E+02 TG L12460-02 5/22/2007 Sb-124 4.60E+01 3.40E+01 1.1OE+02 TG L12460-02 5/22/2007 Sb-125 6.OOE+00 3.30E+01 1.20E+02 TG L12460-02 5/22/2007 Se-75 -2.20E+01 1.30E+01 5.30E+01 TG L12460-02 5/22/2007 Zn-65 0.OOE+00 3.20E+01 1.30E+02 TG L12460-02 5/22/2007 Zr-95 -1.60E+01 2.60E+01 1.1OE+02 TG L12597-02 6/19/2007 AcTh-228 -8.OOE+00 6.1OE+01 2.30E+02 TG L12597-02 6/19/2007 Ag-108m 8.OOE+00 1.40E+01 4.90E+01 TG L12597-02 6/19/2007 Ag-ill0m 2.20E+01 2.50E+01 8.80E+01 TG L12597-02 6/19/2007 Ba-140 4.1OE+01 8.20E+01 3.1OE+02 TG L12597-02 6/19/2007 Be-7 9.1OE+02 3.1OE+02 9.80E+02 TG L12597-02 6/19/2007 Ce-141 -1.10E+01 3.60E+01 1.30E+02 TG L12597-02 6/19/2007 Ce-144 -3.60E+01 7.20E+01 2.70E+02 TG L12597-02 6/19/2007 Co-57 -4.40E+00 9.20E+00 3.40E+01 TG L12597-02 6/19/2007 Co-58 0.OOE+00 2.20E+01 8.30E+01 TG L12597-02 6/19/2007 Co-60 3.OOE+00 1.50E+01 5.80E+01 TG L12597-02 6/19/2007 Cr-51 -1. 1OE+02 2.30E+02 8.40E+02 TG L12597-02 6/19/2007 Cs-134 2.60E+01 1.50E+01 4.90E+01 TG L12597-02 6/19/2007 Cs-137 2.60E+01 1.70E+01 5.70E+01 TG L12597-02 6/19/2007 Fe-59 -3.90E+01 5.70E+01 2.20E+02 TG LI12597-02 6/19/2007 1-131 1.1 OE+02 1.80E+02 6.20E+02 TG L12597-02 6/19/2007 1-131 2.90E+00 7.30E+00 3.90E+01 TG L12597-02 6/19/2007 K-40 2.86E+03 3.90E+02 7.40E+02 TG L12597-02 6/19/2007 La-140 4.70E+01 9.50E+01 3.60E+02 TG L12597-02 6/19/2007 Mn-54 1.50E+01 1.70E+01 5.80E+01 TG L12597-02 6/19/2007 Nb-95 -2.60E+01 2.80E+01 1.1OE+02 TG L12597-02 6/19/2007 Ru- 103 -3.20E+01 2.60E+01 1.00E+02 TG L12597-02 6/19/2007 Ru-106 -1.80E+02 1.60E+02 6.40E+02 TG L12597-02 6/19/2007 Sb-124 -1.40E+01 4.60E+01 2.OOE+02 TG L12597-02 6/19/2007 Sb-125 -5.80E+01 4.50E+01 1.80E+02 TG L12597-02 6/19/2007 Se-75 -2.5OE+01 2.OOE+01 7.70E+01 TG L12597-02 6/19/2007 Zn-65 -5.OOE+01 5.OOE+01 2.OOE+02 TG L12597-02 6/19/2007 Zr-95 0.OOE+00 4.OOE+01 1.50E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-191-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCilkg) (pCi/kg)

TG L12741-02 7/24/2007 AcTh-228 5.20E+01 4.50E+01 1.50E+02 TG L12741-02 7/24/2007 Ag-108m 1.61E+01 9.10E+00 3.OOE+01 TG L12741-02 7/24/2007 Ag-110m -9.OOE+00 1.50E+01 5.90E+0I TG L12741-02 7/24/2007 Ba-140 4.OOE+00 2.OOE+01 7.90E+01 TG L12741-02 7/24/2007 Be-7 1.35E+03 1.50E+02 3.OOE+02 TG L12741-02 7/24/2007 Ce-141 -2.20E+01 1.30E+01 4.70E+01 TG L12741-02 7/24/2007 Ce-144 -7.OOE+00 4.40E+01 1.60E+02 TG L12741-02 7/24/2007 Co-57 1.19E+01 5.80E+00 1.90E+01 TG L12741-02 7/24/2007 Co-58 -1.00E+01 1.40E+01 5.40E+01 TG L12741-02 7/24/2007 Co-60 0.OOE+00 1.20E+01 4.60E+01 TG L12741-02 7/24/2007 Cr-51 -1.23E+02 8.50E+01 3.30E+02 TG L12741-02 7/24/2007 Cs-134 -4.OOE+00 1.30E+01 4.80E+01 TG L12741-02 7/24/2007 Cs-137 -6.OOE+00 1.1OE+OI 4.1OE+OI TG L12741-02 7/24/2007 Fe-59 0.OOE+00 2.30E+01 8.90E+01 TG L12741-02 7/24/2007 1-131 8.40E+00 9.60E+00 3.80E+OI TG L12741-02 7/24/2007 1-131 -3.70E+01 2.20E+01 8.90E+01 TG L12741-02 7/24/2007 K-40 2.91E+03 3.20E+02 6.20E+02 TG L12741-02 7/24/2007 La- 140 4.OOE+00 2.20E+01 9.OOE+01 TG L12741-02 7/24/2007 Mn-54 1.00E+00 1.20E+01 4.50E+01 TG L12741-02 7/24/2007 Nb-95 8.OOE+00 1.50E+01 5.20E+01 TG L12741-02 7/24/2007 Ru- 103 9.OOE+00 1.20E+01 4.10E+01 TG L12741-02 7/24/2007 Ru-106 1.32E+02 8.80E+01 2.90E+02 TG L12741-02 7/24/2007 Sb-124 -1.50E+01 3.60E+01 1.40E+02 TG L12741-02 7/24/2007 Sb-125 2.OOE+00 2.60E+OI 9.40E+01 TG L12741-02 7/24/2007 Se-75 -1.60E+01 1.1 OE+0 1 4.1OE+0I TG L12741-02 7/24/2007 Zn-65 -4.OOE+00 2.30E+01 9.OOE+01 TG L12741-02 7/24/2007 Zr-95 -5.OOE+00 2.30E+01 8.50E+01 TG L12850-02 8/16/2007 AcTh-228 5.OOE+01 5.OOE+01 1.70E+02 TG L12850-02 8/16/2007 Ag-108m -2.30E+00 9.80E+00 3.60E+01 TG L12850-02 8/16/2007 Ag-110in -2.20E+01 2.OOE+01 7.80E+01 TG L12850-02 8/16/2007 Ba-140 -4.60E+01 2.50E+01 1.20E+02 TG L12850-02 8/16/2007 Be-7 5.70E+02 1.70E+02 5.20E+02 TG L12850-02 8/16/2007 Ce-141 -2.30E+0I 1.70E+01 6.20E+01 TG L12850-02 8/16/2007 Ce-144 -2.60E+01 5.70E+01 2.OOE+02 TG L12850-02 8/16/2007 Co-57 1.14E+0I 7.20E+00 2.40E+01 TG L12850-02 8/16/2007 Co-58 -9.OOE+00 1.50E+01 5.60E+01 TG L12850-02 8/16/2007 Co-60 -2.80E+01 1.80E+01 7.40E+01 TG L12850-02 8/16/2007 Cr-51 0.OOE+00 1.20E+02 4. 1OE+02 TG L12850-02 8/16/2007 Cs-134 8.OOE+00 1.60E+01 5.80E+01 TG L12850-02 8/16/2007 Cs-137 3.20E+01 1.50E+01 4.80E+01 TG L12850-02 8/16/2007 Fe-59 -4.30E+01 3.30E+01 1.40E+02 TG L12850-02 8/16/2007 1-131 -2.40E+01 3.30E+01 1.20E+02 TG L12850-02 8/16/2007 1-131 1.80E+01 1.40E+01 4.80E+01 TG L12850-02 8/16/2007 K-40 4.42E+03 4.1 OE+02. 7.OOE+02 TG L12850-02 8/16/2007 La-140 -5.30E+01 2.90E+01 1.40E+02 TG L12850-02 8/16/2007 Mn-54 -1.00E+00 1.60E+01 5.80E+01 TG L12850-02 8/16/2007 Nb-95 2.80E+01 1.70E+01 5.60E+01 TG L12850-02 8/16/2007 Ru-103 -1.70E+01 1.40E+01 5.30E+01I TG L12850-02 8/16/2007 Ru-106 8.OOE+01 1.30E+02 4.40E+02 TG L12850-02 8/16/2007 Sb-124 -4.40E+01 4.OOE+01 1.70E+02 TG L12850-02 8/16/2007 Sb-125 3.90E+0 1 3.40E+01 1.1OE+02 TG L12850-02 8/16/2007 Se-75 6.OOE+00 1.40E+01 4.70E+0 I TG L12850-02 8/16/2007 Zn-65 -5.10E+01 2.90E+01 1.20E+02 TG L12850-02 8/16/2007 Zr-95 -4.OOE+01 2.90E+01 1.1OE+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-192-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE . END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG L13009-02 9/25/2007 AcTh-228 7.1OE+01 5.50E+01 1.90E+02 TG L13009-02 9/25/2007 Ag- 108m 6.OOE+00 1.IOE+01 4.OOE+01 TG L13009-02 9/25/2007 Ag-110m 0.OOE+00 2.10E+01 7.60E+0 1 TG L13009-02 9/25/2007 Ba-140 -1.40E+01 3.OOE+01 1.20E+02 TG L13009-02 9/25/2007 Be-7 1.09E+03 2.OOE+02 5.80E+02 TG L13009-02 9/25/2007 Ce-141 3.OOE+01 1.90E+01 6.40E+01 TG L13009-02 9/25/2007 Ce-144 -2.60E+01 5.70E+01 2.OOE+02 TG L13009-02 9/25/2007 Co-57 7.30E+00 7.20E+00 2.40E+01 TG L13009-02 9/25/2007 Co-58 -2.40E+0 1 1.50E+01 6.OOE+01 TG L13009-02 9/25/2007 Co-60 2.20E+01 1.60E+01 5.40E+0 1 TG L13009-02 9/25/2007 Cr-5i -1.00E+01 1.40E+02 4.90E+02 TG L13009-02 9/25/2007 Cs-134 -8.OOE+00 1.50E+01 5.60E+01 TG L13009-02 9/25/2007 Cs-137 -2.50E+01 1.30E+01 5.20E+01 TG L13009-02 9/25/2007 Fe-59 -5.OOE+00 3.10E+01 1.20E+02 TG L13009-02 9/25/2007 1-131 2.OOE+01 1.60E+01 5.50E+01 TG L13009-02 9/25/2007 1-131 -3.60E+01 4.40E+0 1 1.60E+02 TG L13009-02 9/25/2007 K-40 3.23E+03 3,90E+02 8.80E+02 TG L13009-02 9/25/2007 La-140 -1.60E+01 3.50E+01 1.40E+02 TG L13009-02 9/25/2007 Mn-54 2.0OE+00 1.40E+01 5.OOE+01 TG L13009-02 9/25/2007 Nb-95 4.50E+01 2.90E+01 9.50E+01 TG L13009-02 9/25/2007 Ru-103 -1.00E+01 1.50E+01 5.50E+0 I TG L13009-02 9/25/2007 Ru-106 1 10OE+02 1.00E+02 3.50E+02 TG L13009-02 9/25/2007 Sb-124 9.OOE+00 3.60E+01 1.40E+02 TG L13009-02 9/25/2007 Sb-125 -1.00E+01 3.40E+01 1.20E+02 TG L13009-02 9/25/2007 Se-75 -1.70E+01 1.30E+01 4.70E+0 1 TG L13009-02 9/25/2007 Zn-65 4.70E+01 7.30E+01 2.50E+02 TG L13009-02 9/25/2007 Zr-95 2.70E+01 2.60E+0 1 8.90E+01 TG L13129-02 10/22/2007 AcTh-228 5.60E+01 3.OOE+01 1.30E+02 TG L13129-02 10/22/2007 Ag-108m -4.30E+00 7.OOE+00 2.50E+01 TG L13129-02 10/22/2007 Ag-110im 6.OOE+00 1.00E+01 3.60E+0 1 TG L13129-02 10/22/2007 Ba-140 -2.90E+0 1 2.30E+01 8.70E+01 TG L13129-02 10/22/2007 Be-7 3.15E+03 1.50E+02 3.OOE+02 TG L13129-02 10/22/2007 Ce-141 -2. 1OE+01 1.30E+01 4.60E+01 TG L13129-02 10/22/2007 Ce-144 4.90E+01 4.OOE+01 1.30E+02 TG L13129-02 10/22/2007 Co-57 7.30E+00 5.OOE+00 1.70E+01 TG L13129-02 10/22/2007 Co-58 0.OOE+00 8.60E+00 3.OOE+01 TG L13129-02 10/22/2007 Co-60 1.08E+01 8.70E+00 2.90E+01 TG L13129-02 10/22/2007 Cr-51 1.66E+02 9.10E+01 3.OOE+02 TG L13129-02 10/22/2007 Cs-134 3.60E+00 9.20E+00 3.20E+01 TG L13129-02 10/22/2007 Cs-137 -1.31E+01 9.30E+00 3.40E+01 TG L13129-02 10/22/2007 Fe-59 -1.40E+01 2. 1OE+01 7.50E+01 TG L13129-02 10/22/2007 1-131 4.50E+00 9.1OE+00 4.20E+01 TG L13129-02 10/22/2007 1-131 -3.OOE+01 3.20E+01 1.1 OE+02 TG L13129-02 10/22/2007 K-40 2.75E+03 2.OOE+02 4.1OE+02 TG L13129-02 10/22/2007 La-140 -2.90E+01 2.30E+01 8.70E+01 TG L13129-02 10/22/2007 Mn-54 2.80E+00 8.40E+00 2.90E+01 TG L13129-02 10/22/2007 Nb-95 9.OOE+00 1.1 OE+0 1 3.70E+01 TG L13129-02 10/22/2007 Ru-103 -2.04E+01 9.1OE+00 3.40E+01 TG L13129-02 10/22/2007 Ru-106 -1.29E+02 7.90E+01 2.90E+02 TG L13129-02 10/22/2007 Sb-124 -4.60E+01 2.10E+01 8.70E+0 1 TG L13129-02 10/22/2007 Sb-125 1.20E+01 2.1OE+01 7.20E+01 TG L13129-02 10/22/2007 Se-75 -1.53E+01 9.70E+00 3.50E+01 TG L13129-02 10/22/2007 Zn-65 -2.20E+0 1 2.90E+01 1.1 OE+02 TG L13129-02 10/22/2007 Zr-95 -3.OOE+00 1.50E+01 5.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-193-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG 10 L12460-03 5/22/2007 AcTh-228 1.36E+02 4.50E+01 1.20E+02 TG 10 L12460-03 5/22/2007 Ag-108m -1.20E+01 1.00E+01 4.1OE+01 TG 10 L12460-03 5/22/2007 Ag-110m -1.00E+01 1.70E+01 6.90E+01 TG 10 L12460-03 5/22/2007 Ba-140 -2.80E+01 3.60E+01 1.50E+02 TG 10 L12460-03 5/22/2007 Be-7 2.50E+02 1.50E+02 4.90E+02 TG 10 L12460-03 5/22/2007 Ce-141 -3.60E+0 1 1.90E+01 7.30E+01 TG 10 L12460-03 5/22/2007 Ce-144 4.1OE+01 5.40E+01 1.90E+02 TG 10 L12460-03 5/22/2007 Co-57 9.OOE-01 7.30E+00 2.60E+01 TG 10 L12460-03 5/22/2007 Co-58 1.90E+01 1.30E+01 4.50E+01 TG 10 L12460-03 5/22/2007 Co-60 1.00E+01 1.60E+01 5.80E+01 TG 10 L12460-03 5/22/2007 Cr-51 -2.40E+02 1.30E+02 5.20E+02 TG 10 L12460-03 5/22/2007 Cs-134 -1.80E+01 1.30E+01 5.50E+01 TG 10 L12460-03 5/22/2007 Cs-137 4.1OE+01 1.70E+01 5.40E+01 TG 10 L12460-03 5/22/2007 Fe-59 -1.80E+01 3.70E+01 1.40E+02 TG 10 L12460-03 5/22/2007 1-131 1.40E+01 5.1OE+01 1.80E+02 TG 10 L12460-03 5/22/2007 1-131 -6.36E+00 9.80E-01 4.20E+01 TG 10 L12460-03 5/22/2007 K-40 3.87E+03 4.20E+02 7.80E+02 TG 10 L12460-03 5/22/2007 La-140 -3.20E+01 4.10E+01 1.80E+02 TG 10 L12460-03 5/22/2007 Mn-54 9.OOE+00 1.1OE+01 4.OOE+01 TG 10 L12460-03 5/22/2007 Nb-95 -1.10E+01 1.60E+01 6.50E+01 TG 10 L12460-03 5/22/2007 Ru-103 -8.OOE+00 1.40E+OI 5.40E+01 TG 10 L12460-03 5/22/2007 Ru-106 -1.1OE+02 1.1OE+02 4.50E+02 TG 10 L12460-03 5/22/2007 Sb-124 -1.00E+01 2.20E+01 1.1OE+02 TG 10 L12460-03 5/22/2007 Sb-125 -9.OOE+00 2.90E+O1 1.1OE+02 TG 10 L12460-03 5/22/2007 Se-75 1.60E+01 1.60E+01 5.50E+01 TG 10 L12460-03 5/22/2007 Zn-65 1.00E+01 3.OOE+01 1.1 OE+02 TG 10 L12460-03 5/22/2007 Zr-95 -2.30E+01 2.20E+01 9.30E+01 TG 10 L12597-03 6/19/2007 AcTh-228 6.OOE+01 6.60E+01 2.30E+02 TG 10 L12597-03 6/19/2007 Ag-108m -8.OOE+00 1.20E+01 4.50E+01 TG 10 L12597-03 6/19/2007 Ag-110m 1.50E+01 2.20E+01 7.80E+01 TG 10 L12597-03 6/19/2007 Ba-140 7.20E+01 8.40E+01 3.OOE+02 TG 10 L12597-03 6/19/2007 Be-7 8.30E+02 2.40E+02 7.OOE+02 TG 10 L12597-03 6/19/2007 Ce-141 -1.20E+01 3.50E+01 1.20E+02 TG 10 L12597-03 6/19/2007 Ce-144 7.70E+01 7.40E+01 2.50E+02 TG 10 L12597-03 6/19/2007 Co-57 -1.00E+01 9.OOE+00 3.40E+01 TG 10 L12597-03 6/19/2007 Co-58 -1.60E+01 1.60E+01 6.70E+01 TG 10 L12597-03 6/19/2007 Co-60 2.20E+01 1.70E+01 5.90E+01 TG 10 L12597-03 6/19/2007 Cr-51 -1.50E+02 2.50E+02 9.20E+02 TG 10 L12597-03 6/19/2007 Cs-134 4.OOE+01 1.80E+01 5.60E+01 TG 10 L12597-03 6/19/2007 Cs-137 8.OOE+00 1.60E+01 5.80E+01 TG 10 L12597-03 6/19/2007 Fe-59 5.60E+01 4.90E+01 1.70E+02 TG 10 L12597-03 6/19/2007 1-131 2.50E+02 1.60E+02 5.30E+02 TG 10 L12597-03 6/19/2007 1-131 3.30E+00 8.30E+00 4.40E+01 TG 10 L12597-03 6/19/2007 K-40 3.93E+03 4.30E+02 7.50E+02 TG 10 L12597-03 6/19/2007 La-140 8.30E+01 9.70E+01 3.40E+02 TG 10 L12597-03 6/19/2007 Mn-54 8.OOE+00 1.70E+01 6.10E+01 TG 10 L12597-03 6/19/2007 Nb-95 1.00E+00 2.30E+01 8.50E+01 TG 10 L12597-03 6/19/2007 Ru- 103 -2.OOE+01 2.40E+01 9.1OE+01 TG 10 L12597-03 6/19/2007 Ru-106 -3,40E+02 1.40E+02 6.OOE+02 TG 10 L12597-03 6/19/2007 Sb-124 3.70E+01 4.40E+01 1.60E+02 TG 10 L12597-03 6/19/2007 Sb-125 0.OOE+00 3.80E+01 1.40E+/-02 TG 10 L12597-03 6/19/2007 Se-75 -6.OOE+00 2.00E+01 7.30E+0 1 TG 10 L12597-03 6/19/2007 Zn-65 -1.20E+01 3.90E+01 1.50E+02 TG 10 L12597-03 6/19/2007 Zr-95 0.OOE+00 3.40E+01 1.30E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-194-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG L12741-03 7/24/2007 AcTh-228 -5.90E+01 4.70E+01 1.90E+02 TG L12741-03 7/24/2007 Ag- 108rm -1.28E+01 8.90E+00 3.60E+01 TG L12741-03 7/24/2007 Ag-110in -9.OOE+00 1.60E+01 6.30E+01 TG L12741-03 7/24/2007 Ba-140 6.OOE+00 1.90E+01 7.50E+01 TG L12741-03 7/24/2007 Be-7 1.39E+03 2.OOE+02 5.20E+02 TG L12741-03 7/24/2007 Ce-141 -1.20E+01 1.80E+01 6.40E+0 1 TO L12741-03 7/24/2007 Ce-144 1.32E+02 5.30E+01 1.60E+02 TG L12741-03 7/24/2007 Co-57 1.10E+00 6.50E+00 2.30E+0 1 TG L12741-03 7/24/2007 Co-58 -4.OOE+00 1.40E+01 5.30E+01 TG L12741-03 7/24/2007 Co-60 -6.OOE+00 1.1OE+01 4.50E+01 TG L12741-03 7/24/2007 Cr-51 -9.OOE+01 1.1OE+02 4.20E+02 TG L12741-03 7/24/2007 Cs-134 -9.OOE+00 1.30E+01 5.OOE+01 TG L12741-03 7/24/2007 Cs-137 1.80E+01 1.20E+01 4.1OE+0I TG L12741-03 7/24/2007 Fe-59 -3.OOE+00 2.90E+01 1.1OE+02 TG L12741-03 7/24/2007 1-131 -5.10E+01 3.50E+01 1.40E+02 TG L12741-03 7/24/2007 1-131 7.OOE-01 7.40E+00 4.30E+01 TG L12741-03 7/24/2007 K-40 2.62E+03 3.40E+02 7.60E+02 TG L12741-03 7/24/2007 La-140 7.OOE+00 2.10E+01 8.60E+01 TG L12741-03 7/24/2007 Mn-54 8.OOE+00 1.20E+01 4.40E+01 TO L12741-03 7/24/2007 Nb-95 8.OOE+00 1.40E+01 5.20E+01 TG L12741-03 7/24/2007 Ru-103 3.OOE+01 1.40E+01 4.50E+0I TG L12741-03 7/24/2007 Ru-106 -1.OOE+01 1.20E+02 4.40E+02 TG L12741-03 7/24/2007 Sb-124 2.40E+0I 3.50E+01 1.30E+02 TG L12741-03 7/24/2007 Sb-125 -2.70E+0 1 2.80E+01 1.1OE+02 TG L12741-03 7/24/2007 Se-75 2.40E+01 1.30E+0I 4.10E+01 TG L12741-03 7/24/2007 Zn-65 -2.80E+01 2.60E+01 1.10E+02 TG L12741-03 7/24/2007 Zr-95 -4.OOE+00 2.OOE+01 7.70E+0 1 TG L12850-03 8/16/2007 AcTh-228 -3.60E+0I 4.80E+01 1.90E+02 TG L12850-03 8/16/2007 Ag-108m -2.60E+00 8. 1OE+00 3.1OE+01 TG L12850-03 8/16/2007 Ag-0mrn -4.30E+0I 1.60E+01 7.60E+0 1 TG L12850-03 8/16/2007 Ba-140 -8.OOE+00 3.60E+01 1.40E+02 TO L12850-03 8/16/2007 Be-7 2.29E+03 2.1OE+02 3.80E+02 TG L12850-03 8/16/2007 Ce-141 -1.40E+01 1.40E+01 5.20E+01 TG L12850-03 8/16/2007 Ce-144 -2.20E+01 3.70E+01 1.40E+02 TG L12850-03 8/16/2007 Co-57 1.80E+00 4.60E+00 1.60E+01 TG L12850-03 8/16/2007 Co-58 5.OOE+00 1.40E+01 5.1OE+0I TG L12850-03 8/16/2007 Co-60 8.OOE+00 1.40E+0I 5.20E+01 TG L12850-03 .8/16/2007 Cr-51 2.OOE+02 9.80E+0 1 3.1OE+02 TG L12850-03 8/16/2007 Cs-134 -5.OOE+00 1.40E+01 5.30E+0I TG L12850-03 8/16/2007 Cs-137 -8.OOE+00 1.20E+01 4.60E+01 TG L12850-03 8/16/2007 Fe-59 5.OOE+01 3.40E+01 1.1OE+02 TG L12850-03 8/16/2007 1-131 -2.80E+01 2.90E+01 1.1OE+02 TG L12850-03 8/16/2007 1-131 -7.40E+00 9.90E+00 5.30E+0I TG L12850-03 8/16/2007 K-40 1.88E+03 3.OOE+02 6.40E+02

TG L12850-03 8/16/2007 La-140 -9.OOE+00 4.20E+01 1.60E+02 TG L12850-03 8/16/2007 Mn-54 -2.20E+01 1.30E+01 5.50E+01 TG L12850-03 8/16/2007 Nb-95 -3.OOE+00 1.80E+01 6.60E+0 I TG L12850-03 8/16/2007 Ru-103 5.80E+00 9.60E+00 3.50E+01 TG L12850-03 8/16/2007 Ru-106 3.50E+01 9.50E+01 3.50E+02 TG L12850-03 8/16/2007 Sb-124 -1.00E+01 3.10E+01 1.30E+02 TO L12850-03 8/16/2007 Sb-125 3.60E+0I 2.70E+01 9.20E+01 TG L12850-03 8/16/2007 Se-75 -1 .04E+01 9.60E+00 3.80E+01 TO L12850-03 8/16/2007 Zn-65 -6.50E+01 2.40E+0I 1.20E+02 TG L12850-03 8/16/2007 Zr-95 -1.10E+01 2.60E+01 9.90E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-195-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TG 10 L13009-03 9/25/2007 AcTh-228 4.90E+01 5.90E+01 2.OOE+02 TG 10 L13009-03 9/25/2007 Ag- 108m 1.00E+01 1.30E+01 4.50E+01 TG 10 L13009-03 9/25/2007 Ag-ll0m 1.40E+01 1.90E+01 6.60E+0 1 TG 10 L13009-03 9/25/2007 Ba-140 2.50E+01 2.20E+01 7.60E+0 1 TG 10 L13009-03 9/25/2007 Be-7 1.13E+03 2.20E+02 6.20E+02 TG 10 L13009-03 9/25/2007 Ce- 141 3.20E+01 2.40E+01 8.10E+01 TG 10 L13009-03 9/25/2007 Ce-144 1.05E+02 7.70E+01 2.60E+02 TG 10 L13009-03 9/25/2007 Co-57 1.85E+01 8.40E+00 2.70E+01 TG 10 L13009-03 9/25/2007 Co-58 -4.OOE+00 1.50E+01 5.60E+01 TG 10 L13009-03 9/25/2007 Co-60 1.50E+01 1.50E+01 5.10E+01 TG 10 L13009-03 9/25/2007 Cr-51 -2.10E+02 1.60E+02 6.OOE+02 TG 10 L13009-03 9/25/2007 Cs-134 8.OOE+00 1.70E+01 5.90E+01 TG 10 L13009-03 9/25/2007 Cs-137 -3.50E+01 1.50E+01 6.OOE+01 TG 10 L13009-03 9/25/2007 Fe-59 -1.30E+01 3.50E+01 1.30E+02 TG 10 L13009-03 9/25/2007 1-131 4.90E+01 4.80E+01 1.60E+02 TG 10 L13009-03 9/25/2007 1-131 -2.1 OE+00 9.90E+00 4.90E+01 TG 10 L13009-03 9/25/2007 K-40 4.06E+03 3.70E+02 6. I OE+02 TG 10 L13009-03 9/25/2007 La-140 2.90E+01 2.50E+01 8.80E+01 TG 10 L13009-03 9/25/2007 Mn-54 0.OOE+00 1.50E+01 5.50E+01 TG 10 L13009-03 9/25/2007 Nb-95 -3.30E+01 3.10E+01 1.1OE+02 TG 10 L13009-03 9/25/2007 Ru- 103 5.OOE+00 1.70E+01 5.90E+01 TG 10 L13009-03 9/25/2007 Ru-106 -2.OOE+01 1.30E+02 4.90E+02 TG 10 L13009-03 9/25/2007 Sb-124 2.30E+01 3.40E+01 1.20E+02 TG 10 L13009-03 9/25/2007 Sb-125 -4.50E+01 3.50E+01 1.30E+02 TG 10 L13009-03 9/25/2007 Se-75 -I.IOE+01 1.80E+01 6.30E+0I TG 10 L13009-03 9/25/2007 Zn-65 6.1OE+0I 6.70E+0I 2.40E+02 TG 10 L13009-03 9/25/2007 Zr-95 4.OOE+01 2.70E+0I 9.1OE+01 TG 10 L13129-03 10/22/2007 AcTh-228 5.20E+01 6.OOE+01 2.OOE+02 TG 10 L13129-03 10/22/2007 Ag- 108rm 3.40E+01 1.30E+01 4.20E+01 TG 10 L13129-03 10/22/2007 Ag-110m -1.40E+01 2.1OE+01 8.1OE+01 TG 10 L13129-03 10/22/2007 Ba-140 1.60E+01 2.70E+01 9.90E+01 TG 10 L13129-03 10/22/2007 Be-7 1.14E+03 1.90E+02 5.1OE+02 TG 10 L13129-03 10/22/2007 Ce-141 -3.OOE+00 2.30E+01 7.90E+01 TG 10 L13129-03 10/22/2007 Ce-144 3.50E+01 8.30E+01 2.80E+02 TG 10 L13129-03 10/22/2007 Co-57 -3.46E+01 9.30E+00 3.60E+01 TG 10 L13129-03 10/22/2007 Co-58 6.OOE+00 1.60E+01 5.80E+01 TG 10 L13129-03 10/22/2007 Co-60 -1.10E+01 1.60E+01 6.30E+0I TG 10 L13129-03 10/22/2007 Cr-51 -1.80E+02 1.50E+02 5.40E+02 TG 10 L13129-03 10/22/2007 Cs-134 -1.10E+01 1.50E+01 5.60E+01 TG 10 L13129-03 10/22/2007 Cs-137 5.OOE+00 1.70E+01 5.90E+01 TG 10 L13129-03 10/22/2007 Fe-59 -4.50E+01 2.90E+01 1.20E+02 TG 10 L13129-03 10/22/2007 1-131 -7.OOE+00 3.30E+01 1.20E+02 TG 10 L13129-03 10/22/2007 1-131 -8.80E+00 1.40E+00 4.90E+01 TG 10 L13129-03 10/22/2007 K-40 2.85E+03 3.40E+02 6.90E+02 TG 10 L13129-03 10/22/2007 La-140 1.60E+01 2.70E+01 9.90E+01 TG 10 L13129-03 10/22/2007 Mn-54 -2.OOE+00 1.60E+01 5.90E+01 TG 10 L13129-03 10/22/2007 Nb-95 0.OOE+00 2.50E+01 8.60E+01 TG 10 L13129-03 10/22/2007 Ru-103 -2.OOE+00 1.50E+01 5.30E+0I TG 10 L13129-03 10/22/2007 Ru-106 -3.OOE+01 1.30E+02 4.80E+02 TG 10 L13129-03 10/22/2007 Sb-124 3.70E+01 3.90E+01 1.40E+02 TG 10 L13129-03 10/22/2007 Sb-125 -6.90E+01 3.90E+01 1.50E+02 TG 10 L13129-03 10/22/2007 Se-75 -5.OOE+00 1.60E+01 5.90E+01 TG 10 L13129-03 10/22/2007 Zn-65 1.IOE+01 6.70E+01 2.30E+02 TG 10 L13129-03 10/22/2007 Zr-95 -2.40E+01 2.60E+01 9.90E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-196-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 1 L12160-01 3/16/2007 AcTh-228 6.OOE-01 6.40E+00 2.30E+-01 WG 1 L12160-01 3/16/2007 Ag-108m -2.OOE+00 1.80E+00 6.50E+00 WG 1 L12160-01 3/16/2007 Ag-0mrn 6.OOE-01 2.1OE+00 7.70E+00 WG 1 L12160-01 3/16/2007 Ba-140 -2.60E+00 3.30E+00 1.30E+01 WG 1 L12160-01 3/16/2007 Be-7 -1.30E+01 1.60E+01 5.90E+01 WG 1 L12160-01 3/16/2007 Ce-141 6.40E+00 3.30E+00 1.10E+01 WG 1 L12160-01 3/16/2007 Ce-144 -9.OOE+00 1.00E+01 3.60E+01 WG 1 L12160-01 3/16/2007 Co-57 4.OOE-01 1.40E+00 4.80E+00 WG 1 L12160-01 3/16/2007 Co-58 7.OOE-01 2.OOE+00 6.90E+00 WG 1 L12160-01 3/16/2007 Co-60 -2.30E+00 1.70E+00 6.90E+00 WG 1 L12160-01 3/16/2007 Cr-51 -1.40E+01 1.70E+01 6.1OE+01 WG 1 L12160-01 3/16/2007 Cs-134 4.80E+00 1.90E+00 5.90E+00 WG I L12160-01 3/16/2007 Cs-137 -2.40E+00 1.70E+00 6.50E+00 WG 1 L12160-01 3/16/2007 Fe-59 4.OOE-01 3.50E+00 1.30E+01 WG 1 L12160-01 3/16/2007 GROSS BETA 7.30E+00 1.30E+00 3.20E+00 WG 1 L12160-01 3/16/2007 H-3 1.1OE+02 4.40E+02 1.30E+03 WG 1 L12160-01 3/16/2007 1-131 5.50E+00 4.1OE+00 1.40E+01 WG 1 L12160-01 3/16/2007 K-40 5.20E+01 2.70E+01 8.70E+01 WG 1 L12160-01 3/16/2007 La-140 -3.OOE+00 3.80E+00 1.50E+01 WG I L12160-01 3/16/2007 Mn-54 -1.30E+00 1.70E+00 6.40E+00 WG I L12160-01 3/16/2007 Nb-95 -2.20E+00 2.30E+00 8.60E+00 WG I L12160-01 3/16/2007 Ru-103 -2.80E+00 2.10E+00 7.80E+00 WG I L12160-01 3/16/2007 Ru-106 1.30E+01 1.70E+01 6.OOE+01 WG I L12160-01 3/16/2007 Sb-124 3.20E+00 4.20E+00 1.50E+01 WG I L12160-01 3/16/2007 Sb-125 -1.80E+00 5.OOE+00 1.80E+01 WG 1 L12160-01 3/16/2007 Se-75 3.OOE-01 2.30E+00 8.1OE+00 WG 1 L12160-01 3/16/2007 Zn-65 8.OOE+00 8.1OE+00 2.70E+01 WG 1 L12160-01 3/16/2007 Zr-95 3.20E+00 3.50E+00 1.20E+01 WG 1 L12522-01 6/5/2007 AcTh-228 3.40E+00 5.70E+00 2.OOE+01 WG 1 L12522-01 6/5/2007 Ag-108m l.O0E-01 1.30E+00 4.40E+00 WG I L12522-01 6/5/2007 Ag-110m -2.10E+00 1.90E+00 7.20E+00 WG 1 L12522-01 6/5/2007 Ba-140 4.OOE-01 2.90E+00 1.00E+01 WG 1 L12522-01 6/5/2007 Be-7 -3.40E+01 1.60E+01 6.OOE+01 WG 1 L12522-01 6/5/2007 Ce-141 4.10E+00 2.70E+00 8.80E+00 WG 1 L12522-01 6/5/2007 Ce-144 -4.60E+00 8.30E+00 2.90E+01 WG 1 L12522-01 6/5/2007 Co-57 -8.OOE-01 1.00E+00 3.70E+00 WG 1 L12522-01 6/5/2007 Co-58 1.90E+00 1.40E+00 4.80E+00 WG 1 L12522-01 6/5/2007 Co-60 -6.00E-01 il.30E+00 4.90E+00 WG 1 L12522-01 6/5/2007 Cr-51 -9.OOE+00 1.60E+01 5.70E+01 WG 1 L12522-01 6/5/2007 Cs-134 -4.OOE-01 1.60E+00 5.90E+00 WG 1 L12522-01 6/5/2007 Cs-137 1.30E+00 1.50E+00 5.OOE+00 WG 1 L12522-01 6/5/2007 Fe-59 1.90E+00 3.40E+00 1.20E+01 WG 1 L12522-01 6/5/2007 GROSS BETA 5.60E+00 1.20E+00 3.40E+00 WG 1 L12522-01 6/5/2007 H-3 -4.60E+02 4.20E+02 1.30E+03 WG 1 L12522-01 6/5/2007 1-131 5.40E+00 4.1OE+00 1.40E+01 WG I L12522-01 6/5/2007 K-40 8.OOE+00 2.40E+01 8.50E+01 WG 1 L12522-01 6/5/2007 La-140 5.OOE-01 3.30E+00 1.20E+01 WG 1 L12522-01 6/5/2007 Mn-54 -5.OOE-01 1.40E+00 5.20E+00 WG I L12522-01 6/5/2007 Nb-95 0.OOE+00 1.80E+00 6.40E+00 WG 1 L12522-01 6/5/2007 Ru-103 -3.90E+00 1.90E+00 7.10E+00 WG 1 L12522-01 6/5/2007 Ru-106 -9.OOE+00 1.40E+01 5.10E+01 WG I L12522-01 6/5/2007 Sb-124 8.40E+00 4.1OE+00 1.30E+01 WG 1 L12522-01 6/5/2007 Sb-125 -1.60E+00 4.1OE+00 1.50E+01 WG 1 L12522-01 6/5/2007 Se-75 -2.70E+00 1.90E+00 6.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-197-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 1 L12522-01 6/5/2007 Zn-65 -9.OOE+00 4.20E+00 1.60E+01 WG I L12522-01 6/5/2007 Zr-95 -3.60E+00 2.50E+00 9.80E+00 WG 1 L12965-01 9/12/2007 AcTh-228 4.30E+00 7.90E+00 2.80E+01 WG 1 L12965-01 9/12/2007 Ag-108m 0.OOE+00 1.80E+00 6.20E+00 WG 1 L12965-01 9/12/2007 Ag-0mrn 0.OOE+00 2.60E+00 9.50E+00 WG 1 L12965-01 9/12/2007 Ba-140 3.1OE+00 3.30E+00 1.1OE+01 WG 1 L12965-01 9/12/2007 Be-7 -2.OOE+00 1.70E+01 6.1OE+01 WG 1 L12965-01 9/12/2007 Ce-141 4.OOE-01 3.40E+00 1.20E+01 WG 1 L12965-01 9/12/2007 Ce-144 -6.OOE+00 1.30E+01 4.60E+01 WG 1 L12965-01 9/12/2007 Co-57 -4.OOE-01 1.40E+00 5.OOE+00 WG I L12965-01 9/12/2007 Co-58 -2.20E+00 2.20E+00 8.30E+00 WG I L12965-01 9/12/2007 Co-60 -2.OOE-01 2.OOE+00 7.60E+00 WG 1 L12965-01 9/12/2007 Cr-51 -2.30E+01 1.90E+01 6.90E+01 WG I L12965-01 9/12/2007 Cs-134 -2.1OE+00 2.OOE+00 7.70E+00 WG 1 L12965-01 9/12/2007 Cs-137 -2.20E+00 2.OOE+00 7.50E+00 WG 1 L12965-01 9/12/2007 Fe-59 1.1OE+00 3.70E+00 1.30E+01 WG 1 L12965-01 9/12/2007 GROSS BETA 8.30E+00 1.30E+00 2.90E+00 WG 1 L12965-01 9/12/2007 H-3 6.30E+02 4.30E+02 1.20E+03 WG 1 L12965-01 9/12/2007 1-131 -2.80E+00 3.60E+00 1.30E+01 WG 1 L12965-01 9/12/2007 K-40 -8.OOE+00 2.40E+01 9.1OE+01 WG I L12965-01 9/12/2007 La-140 3.50E+00 3.70E+00 1.30E+01 WG I L12965-01 9/12/2007 Mn-54 -4.20E+00 2.20E+00 8.60E+00 WG 1 L12965-01 9/12/2007 Nb-95 2.30E+00 3.60E+00 1.20E+01 WG 1 L12965-01 9/12/2007 Ru-103 -1.80E+00 2.20E+00 7.90E+00 WG 1 L12965-01 9/12/2007 Ru-106 -1.00E+01 1.80E+01 6.60E+01 WG 1 L12965-01 9/12/2007 Sb-124 -9.OOE-01 4.10E+00 1.60E+01 WG I L12965-01 9/12/2007 Sb-125 -1.50E+00 4.80E+00 1.70E+01 WG 1 L12965-01 9/12/2007 Se-75 -2.OOE-01 2.50E+00 8.90E+00 WG I L12965-01 9/12/2007 Zn-65 2.1OE+01 8.70E+00 2.80E+01 WG I L12965-01 9/12/2007 Zr-95 2.10E+00 3.40E+00 1.20E+01 WG I L13338-01 12/5/2007 AcTh-228 7.30E+00 9.20E+00 3.1OE+01 WG I L13338-01 12/5/2007 Ag-108m 1.40E+00 1.70E+00 5.60E+00 WG 1 L13338-01 12/5/2007 Ag-lr0m -7.OOE-01 3.OOE+00 1.1OE+01 WG 1 L13338-01 12/5/2007 Ba-140 1.40E+00 3.20E+00 1.20E+01 WG 1 L13338-01 12/5/2007 Be-7 -2.10E+01 1.60E+01 5.90E+01 WG 1 L13338-01 12/5/2007 Ce-141 -5.OOE-01 2.90E+00 9.90E+00 WG 1 L13338-01 12/5/2007 Ce-144 -1.OOE+01 1.00E+01 3.50E+01 WG 1 L13338-01 12/5/2007 Co-57 1.00E+00 1.30E+00 4.40E+00 WG 1 L13338-01 12/5/2007 Co-58 -1.IOE+00 2.OOE+00 7.60E+00 WG 1 L13338-01 12/5/2007 Co-60 -1.80E+00 2.10E+00 8.40E+00 WG 1 L13338-01 12/5/2007 Cr-51 4.OOE+00 1.90E+01 6.50E+01 WG 1 L13338-01 12/5/2007 Cs-134 9.OOE-01 2.OOE+00 7.10E+00 WG 1 L13338-01 12/5/2007 Cs-137 -2.20E+00 2.30E+00 8.50E+00 WG I L13338-01 12/5/2007 Fe-59 -7.10E+00 3.80E+00 1.60E+01 WG I L13338-01 12/5/2007 GROSS BETA 7.20E+00 1.30E+00 3.50E+00 WG 1 L13338-01 12/5/2007 H-3 1.30E+02 3.20E+02 9.40E+02 WG I L13338-01 12/5/2007 1-131 2.50E+00 3.60E+00 1.20E+01 WG 1 L13338-01 12/5/2007 K-40 6.40E+01 2.70E+01 8.50E+01 WG 1 L13338-01 12/5/2007 La-140 1.40E+00 3.20E+00 1.20E+01 WG 1 L13338-01 12/5/2007 Mn-54 2.30E+00 2.OOE+00 6.70E+00 WG 1 L13338-01 12/5/2007 Nb-95 2.50E+00 3.60E+00 1.20E+01 WG 1 L13338-01 12/5/2007 Ru-103 -6.OOE-01 2.1OE+00 7.40E+00 WG 1 L13338-01 12/5/2007 Ru-106 1.70E+01 1.80E+01 6.1OE+01 WG 1 L13338-01 12/5/2007 Sb-124 -4.90E+00 5.1OE+00 2.1OE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-198-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 1 L13338-01 12/5/2007 Sb-125 1.80E+00 4.90E+00 1.70E+01 WG 1 L13338-01 12/5/2007 Se-75 4.OOE+00 2.1OE+00 6.70E+00 WG 1 L13338-01 12/5/2007 Zn-65 4.20E+00 4.20E+00 1.50E+01 WG 1 L13338-01 12/5/2007 Zr-95 -2.OOE+00 3.80E+00 1.40E+01 WG 13 L12160-02 3/16/2007 AcTh-228 5.30E+00 6.50E+00 2.30E+01 WG 13 L12160-02 3/16/2007 Ag-108m -1.60E+00 1.30E+00 5.OOE+00 WG 13 L12160-02 3/16/2007 Ag-l0rn -6.OOE-01 2.OOE+00 7.30E+00 WG 13 L12160-02 3/16/2007 Ba-140 -5.50E+00 2.80E+00 1.20E+01 WG 13 L12160-02 3/16/2007 Be-7 -2.50E+01 1.30E+01 5.1OE+01 WG 13 L12160-02 3/16/2007 Ce-141 1.70E+00 2.70E+00 9.20E+00 WG 13 L12160-02 3/16/2007 Ce-144 1.28E+01 8.40E+00 2.80E+01 WG 13 L12160-02 3/16/2007 .Co-57 3.OOE-01 1.1OE+00 3.80E+00 WG 13 L12160-02 3/16/2007 Co-58 -6.OOE-01 1.80E+00 6.60E+00 WG 13 L12160-02 3/16/2007 Co-60 -6.OOE-01 1.80E+00 6.70E+00 WG 13 L12160-02 3/16/2007 Cr-51 -1.00E+01 1.50E+01 5.50E+01 WG 13 L12160-02 3/16/2007 Cs-134 1.60E+00 1.70E+00 5.90E+00 WG 13 L12160-02 3/16/2007 Cs-137 6.OOE-01 1.50E+00 5.30E+00 WG 13 L12160-02 3/16/2007 Fe-59 -6.1OE+00 2.90E+00 1.20E+01 WG 13 L12160-02 3/16/2007 GROSSBETA 8.OOE+00 1.40E+00 3.40E+00 WG 13 L12160-02 3/16/2007 H-3 -7.30E+02 4.30E+02 1.30E+03 WG 13 L12160-02 3/16/2007 1-131 -8.90E+00 3.50E+00 1.30E+01 WG 13 L12160-02 3/16/2007 K-40 -2.90E+01 2.1OE+01 8.20E+01 WG 13 L12160-02 3/16/2007 La-140 -6.30E+00 3.20E+00 1.40E+01 WG 13 L12160-02 3/16/2007 Mn-54 -3.20E+00 1.60E+00 6.30E+00 WG 13 L12160-02 3/16/2007 Nb-95 -1.90E+00 2.OOE+00 7.50E+00 WG 13 L12160-02 3/16/2007 Ru-103 -1.30E+00 1.80E+00 6.70E+00 WG 13 L12160-02 3/16/2007 Ru-106 7.OOE+00 1.50E+01 5.30E+01 WG 13 L12160-02 3/16/2007 Sb-124 -2.30E+00 4.OOE+00 1.60E+01 WG 13 L12160-02 3/16/2007 Sb-125 -3.60E+00 4.1OE+00 1.50E+01 WG 13 L12160-02 3/16/2007 Se-75 3.10E+00 2.OOE+00 6.60E+00 WG 13 L12160-02 3/16/2007 Zn-65 -6.90E+00 3.90E+00 1.50E+01 WG 13 L12160-02 3/16/2007 Zr-95 2.50E+00 3.OOE+00 1.00E+01 WG 13 L12522-02 6/5/2007 AcTh-228 -5.OOE-01 7.OOE+00 2.50E+01 WG 13 L12522-02 6/5/2007 Ag-108m 7.00E-01 1.50E+00 5.20E+00 WG 13 L12522-02 6/5/2007 Ag-110in 3.40E+00 2.50E+00 8.30E+00 WG 13 L12522-02 6/5/2007 Ba-140 2.90E+00 2.60E+00 9.OOE+00 WG 13 L12522-02 6/5/2007 Be-7 3.OOE+00 1.70E+01 5.90E+01 WG 13 L12522-02 6/5/2007 Ce-141 -4.OOE+00 3.20E+00 1.1OE+01 WG 13 L12522-02 6/5/2007 Ce-144 -5.70E+00 9.80E+00 3.50E+01 WG 13 L12522-02 6/5/2007 Co-57 4.OOE-01 1.30E+00 4.40E+00 WG 13 L12522-02 6/5/2007 Co-58 -1.10E+00 2.OOE+00 7.40E+00 WG 13 L12522-02 6/5/2007 Co-60 3.OOE+00 2.OOE+00 6.50E+00 WG 13 L12522-02 6/5/2007 Cr-51 -1.90E+01 1.60E+01 6.OOE+01 WG 13 L12522-02 6/5/2007 Cs-134 -1.00E+00 1.90E+00 7.1OE+00 WG 13 L12522-02 6/5/2007 Cs-137 -1.00E+00 1.70E+00 6.20E+00 WG 13 L12522-02 6/5/2007 Fe-59 1.20E+00 3.80E+00 1.40E+01 WG 13 L12522-02 6/5/2007 GROSS BETA 6.70E+00 1.20E+00 3.10E+00 WG 13 L12522-02 6/5/2007 H-3 5.OOE+01 4.30E+02 1.30E+03 WG 13 L12522-02 6/5/2007 1-131 0.OOE+00 3.30E+00 1.20E+01 WG 13 L12522-02 6/5/2007 K-40 -6.OOE+00 2.70E+01 9.80E+01 WG 13 L12522-02 6/5/2007 La-140 3.30E+00 3.OOE+00 1.00E+01 WG 13 L12522-02 6/5/2007 Mn-54 -1.50E+00 1.90E+00 7.OOE+00 WG 13 L12522-02 6/5/2007 Nb-95 -1.60E+00 2.10E+00 7.70E+00 WG 13 L12522-02 6/5/2007 Ru-103 0.OOE+00 2.10E+00 7.30E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-199-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

We 13 L12522-02 6/5/2007 Ru-106 -1.30E+01 1.50E+01 5.70E+01 WG 13 L12522-02 6/5/2007 Sb-124 2.40E+00 3.90E+00 1.40E+01 WG 13 L12522-02 6/5/2007 Sb-125 5.80E+00 4.40E+00 1.50E+01 WG 13 L12522-02 6/5/2007 Se-75 -3.OOE+00 2.20E+00 8.1OE+00 WG 13 L12522-02 6/5/2007 Zn-65 1.57E+01 7.50E+00 2.40E+01 WG 13 L12522-02 6/5/2007 Zr-95 1.20E+00 3.20E+00 1.10E+01 WG 13 L12965-02 9/12/2007 AcTh-228 -9.80E+00 6.70E+00 2.70E+01 WG 13 L12965-02 9/12/2007 Ag-108m 6.OOE-01 1.60E+00 5.50E+00 WG 13 L12965-02 9/12/2007 Ag-0mrn -4.00Eý01 2.60E+00 9.60E+00 WG 13 L12965-02 9/12/2007 Ba-140 -2.50E+00 2.90E+00 1.20E+01 WG 13 L12965-02 9/12/2007 Be-7 -8.OOE+00 1.60E+01 5.80E+01 WG 13 L12965-02 9/12/2007 Ce-141 -4.70E+00 3.20E+00 1.20E+01 WG 13 L12965-02 9/12/2007 Ce-144 1.70E+01 1.10E+01 3.70E+01 WG 13 L12965-02 9/12/2007 Co-57 -1.40E+00 1.30E+00 4.60E+00 WG 13 L12965-02 9/12/2007 Co-58 -1.70E+00 2.10E+00 8.OOE+00 WG 13 L12965-02 9/12/2007 Co-60 3.10E+00 2.20E+00 7.30E+00 WG 13 L12965-02 9/12/2007 Cr-51 3.OOE+00 1.80E+01 6.20E+01 WG 13 L12965-02 9/12/2007 Cs-134 -1.50E+00 2.30E+00 8.70E+00 WG 13 L12965-02 9/12/2007 Cs-137 -2.1OE+00 1.90E+00 7.30E+00 WG 13 L12965-02 9/12/2007 Fe-59 4.80E+00 3.30E+00 1.1OE+01 WG 13 L12965-02 9/12/2007 GROSS BETA 9.80E+00 1.40E+00 3.OOE+00 WG 13 L12965-02 9/12/2007 H-3 2.50E+02 4.30E+02 1.30E+03 WG 13 L12965-02 9/12/2007 1-131 -2.90E+00 3.10E+00 1.20E+01 WG 13 L12965-02 9/12/2007 K-40 -5.40E+01 2.90E+01 1.20E+02 WG 13 L12965-02 9/12/2007 La-140 -2.90E+00 3.40E+00 1.40E+01 WG 13 L12965-02 9/12/2007 Mn-54 -2.50E+00 1.90E+00 7.40E+00 WG 13 L12965-02 9/12/2007 Nb-95 -6.OOE+00 2.50E+00 1.00E+01 WG 13 L12965-02 9/12/2007 Ru-103 5.OOE+00 2.1OE+00 6.60E+00 WG 13 L12965-02 9/12/2007 Ru-106 1.00E+01 1.90E+01 6.60E+01 WG 13 L12965-02 9/12/2007 Sb-124 -2.1OE+00 4.90E+00 2.OOE+01 WG 13 L12965-02 9/12/2007 Sb-125 -1.70E+00 5.30E+00 1.90E+01, WG 13 L12965-02 9/12/2007 Se-75 2.40E+00 2.40E+00 8.00E+00 WG 13 L12965-02 9/12/2007 Zn-65 9.20E+00 8.60E+00 2.90E+I01 WG 13 L12965-02 9/12/2007 Zr-95 1.00E+00 3.20E+00 1.20E+01 WG 13 L13338-02 12/5/2007 AcTh-228 2.40E+00 7.50E+00 2.70E+01 WG 13 L13338-02 12/5/2007 Ag-108m 3.OOE-01 1.80E+00 6.40E+00 WG 13 L13338-02 12/5/2007 Ag-ll0m -4.OOE-01 2.20E+00 8.30E+00 WG 13 L13338-02 12/5/2007 Ba-140 1.40E+00 3.60E+00 1.30E+01 WG 13 L13338-02 12/5/2007 Be-7 -2.40E+01 1.90E+01 7.10E+01 WG 13 L13338-02 12/5/2007 Ce-141 -6.OOE-01 3.40E+00 1.20E+01 WG 13 L13338-02 12/5/2007 Ce-144 -1.50E+01 1.00E+01 3.80E+01 WG 13 L13338-02 12/5/2007 Co-57 -5.OOE-01 1.40E+00 4.90E+00 WG 13 L13338-02 12/5/2007 Co-58 -8.OOE-01 1.80E+00 7.OOE+00 WG 13 L13338-02 12/5/2007 Co-60 1.30E+00 1.90E+00 7.OOE+00 WG 13 L13338-02 12/5/2007 Cr-51 3.OOE+01 1.90E+01 6.20E+01 WG 13 L13338-02 12/5/2007 Cs-134 2.70E+00 2.20E+00 7.50E+00 WG 13 L13338-02 12/5/2007 Cs-137 -3.80E+00 2.OOE+00 8.OOE+00 WG 13 L13338-02 12/5/2007 Fe-59 4.50E+00 4.30E+00 1.50E+01 WG 13 L13338-02 12/5/2007 GROSS BETA 4.40E+00 1.1OE+00 3.OOE+00 WG 13 L13338-02 12/5/2007 H-3 1.1OE+02 3.20E+02 9.40E+02 WG 13 L13338-02 12/5/2007 1-131 7.20E+00 3.80E+00 1.20E+01 WG 13 L13338-02 12/5/2007 K-40 4.80E+01 2.60E+01 8.30E+0I WG 13 L13338-02 12/5/2007 La-140 1.40E+00 3.60E+00 1.30E+01 WG 13 L13338-02 12/5/2007 Mn-54 5.OOE-01 1.90E+00 7.OOE+00 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-200-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 13 L13338-02 12/5/2007 Nb-95 3.OOE-01 2.20E+00 8.1OE+00 WG 13 L13338-02 12/5/2007 Ru-103 4.OOE-01 2.30E+00 8.20E+00 WG 13 L13338-02 12/5/2007 Ru-106 -8.00E+00 1.80E+01 6.70E+01 WG 13 L13338-02 12/5/2007 Sb-124 0.OOE+00 3.90E+00 1.60E+01 WG 13 L13338-02 12/5/2007 Sb-125 -1.10E+00 5.20E+00 1.90E+01 WG 13 L13338-02 12/5/2007 Se-75 1.40E+00 2.50E+00 8.60E+00 WG 13 L13338-02 12/5/2007 Zn-65 1.29E+01 8.50E+00 2.80E+01 WG 13 L13338-02 12/5/2007 Zr-95 0.OOE+00 3.40E+00 1.20E+01 WG 143 L12160-03 3/16/2007 AcTh-228 3.90E+00 6.40E+00 2.20E+01 WG 143 L12160-03 3/16/2007 Ag-108m -3.OOE-01 1.50E+00 5.30E+00 WG 143 L12160-03 3/16/2007 Ag-ll0m -1.10E+00 2.10E+00 8.OOE+00 WG 143 L12160-03 3/16/2007 Ba-140 6.40E+00 3.60E+00 1.20E+01 WG 143 L12160-03 3/16/2007 Be-7 2.80E+01 1.50E+01 4.80E+01 WG 143 L12160-03 3/16/2007 Ce-141 -5.OOE-01 2.90E+00 1.00E+01 WG 143 L12160-03 3/16/2007 Ce-144 2.OOE+00 1.1OE+01 3.70E+01 WG 143 L12160-03 3/16/2007 Co-57 -9.OOE-01 1.30E+00 4.70E+00 WG 143 L12160-03 3/16/2007 Co-58 -1.20E+00 1.70E+00 6.50E+00 WG 143 L12160-03 3/16/2007 Co-60 3.OOE-01 1.90E+00 7.OOE+00 WG 143 L12160-03 3/16/2007 Cr-51 1.70E+01 1.80E+01 6.20E+01 WG 143 L12160-03 3/16/2007 Cs-134 -2.1OE+00 1.80E+00 7.OOE+00 WG 143 L12160-03 3/16/2007 Cs-137 -2.40E+00 1.90E+00 7.20E+00 WG 143 L12160-03 3/16/2007 Fe-59 -1.70E+00 3.80E+00 1.40E+01 WG 143 L12160-03 3/16/2007 GROSS BETA 7.OOE+00 1.20E+00 3.OOE+00 WG 143 L12160-03 3/16/2007 H-3 -8.20E+02 4.30E+02 1.30E+03 WG 143 L12160-03 3/16/2007 1-131 -5.20E+00 3.90E+00 1.40E+01 WG 143 L12160-03 3/16/2007 K-40 -1.50E+01 2.20E+01 8.30E+01 WG 143 L12160-03 3/16/2007 La-140 7.30E+00 4.1OE+00 1.30E+01 WG 143 L12160-03 3/16/2007 Mn-54 4.OOE-01 1.70E+00 5.90E+00 WG 143 L12160-03 3/16/2007 Nb-95 2.70E+00 3.40E+00 1.10E+01 WG 143 L12160-03 3/16/2007 Ru-103 -1.30E+00 1.70E+00 6.30E+00 WG 143 L12160-03 3/16/2007 Ru-106 -8.OOE+00 1.50E+01 5.60E+01 WG 143 L12160-03 3/16/2007 Sb-124 -1.70E+00 3.90E+00 1.50E+01 WG 143 L12160-03 3/16/2007 Sb-125 4.80E+00 4.60E+00 1.50E+01 WG 143 L12160-03 3/16/2007 Se-75 -1.30E+00 2.10E+00 7.30E+00 WG 143 L12160-03 3/16/2007 Zn-65 -8.20E+00 7.90E+00 2.80E+01 WG 143 L12160-03 3/16/2007 Zr-95 -2.80E+00 3.OOE+00 1.1OE+01 WG 143 L12522-03 6/5/2007 AcTh-228 -7.OOE+00 7.40E+00 2.80E+01 WG 143 L12522-03 6/5/2007 Ag-108m -2.40E+00 1.40E+00 5.50E+00 WG 143 L12522-03 6/5/2007 Ag-110m -5.OOE+00 2.50E+00 1.00E+01 WG 143 L12522-03 6/5/2007 Ba-140 5.70E+00 3.30E+00 1.1OE+01 WG 143 L12522-03 6/5/2007 Be-7 -9.OOE+00 1.80E+01 6.50E+01 WG 143 L12522-03 6/5/2007 Ce-141 5.30E+00 3.30E+00 1.1OE+01 WG 143 L12522-03 6/5/2007 Ce-144 1.00E+00 1.00E+01 3.50E+01 WG 143 L12522-03 6/5/2007 Co-57 8.OOE-01 1.40E+00 4.70E+00 WG 143 L12522-03 6/5/2007 Co-58 -2.70E+00 1.90E+00 7.50E+00 WG 143 L12522-03 6/5/2007 Co-60 -1.30E+00 1.90E+00 7.40E+00 WG 143 L12522-03 6/5/2007 Cr-51 -1.20E+01 1.70E+01 5.90E+01 WG 143 L12522-03 6/5/2007 Cs-134 1.40E+00 2.OOE+00 6.90E+00 WG 143 L12522-03 6/5/2007 Cs-137 -2.20E+00 1.60E+00 6.40E+00 WG 143 L12522-03 6/5/2007 Fe-59 5.40E+00 3.90E+00 1.30E+01 WG 143 L12522-03 6/5/2007 GROSS BETA 6.1OE+00 1.20E+00 2.90E+00 WG 143 L12522-03 6/5/2007 H-3 -2.90E+02 4.30E+02 1.30E+03 WG 143 L12522-03 6/5/2007 1-131 0.OOE+00 3.20E+00 1.10E+01 WG 143 L12522-03 6/5/2007 K-40 -2.10E+01 2.50E+01 9.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-201-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 143 L12522-03 6/5/2007 La-140 6.50E+00 3.80E+00 1.20E+01 WG 143 L12522-03 6/5/2007 Mn-54 -1.50E+00 1.70E+00 6.60E+00 WG 143 L12522-03 6/5/2007 Nb-95 1.20E+00 2.1OE+00 7.20E+00 WG 143 L12522-03 6/5/2007 Ru-103 -3.50E+00 2.OOE+00 7.60E+00 WG 143 L12522-03 6/5/2007 Ru-106 0.OOE+00 1.60E+01 5.70E+01 WG 143 L12522-03 6/5/2007 Sb-124 -8.60E+00 4.80E+00 2.OOE+01 WG 143 L12522-03 6/5/2007 Sb-125 2.30E+00 5.1OE+00 1.80E+01 WG 143 L12522-03 6/5/2007 Se-75 0.OOE+00 2.30E+00 8.1OE+00 WG 143 L12522-03 6/5/2007 Zn-65 6.20E+00 8.10E+00 2.70E+01 WG 143 L12522-03 6/5/2007 Zr-95 5.80E+00 3.OOE+00 9.70E+00 WG 143 L12965-03 9/12/2007 AcTh-228 4.OOE+00 6.90E+00 2.50E+01 WG 143 L12965-03 9/12/2007 Ag-108m -1.30E+00 1.50E+00 5.60E+00 WG 143 L12965-03 9/12/2007 Ag-0mrn -2.30E+00 2.60E+00 1.00E+01 WG 143 L12965-03 9/12/2007 Ba-140 -1.80E+00 2.70E+00 1.1OE+01 WG 143 L12965-03 9/12/2007 Be-7 -1.40E+01 1.80E+01 6.50E+01 WG 143 L12965-03 9/12/2007 Ce-141 4.90E+00 3.20E+00 1.10E+01 WG 143 L12965-03 9/12/2007 Ce-144 -7.OOE+00 1.20E+01 4.10E+01 WG 143 L12965-03 9/12/2007 Co-57 -7.OOE-01 1.40E+00 5.OOE+00 WG 143 L12965-03 9/12/2007 Co-58 -7.20E+00 2.OOE+00 8.70E+00 WG 143 L12965-03 9/12/2007 Co-60 -2.60E+00 1.70E+00 7.50E+00 WG 143 L12965-03 9/12/2007 Cr-51 1.00E+01 1.80E+01 6.30E+01 WG 143 L12965-03 9/12/2007 Cs-134 3.OOE-01 2.10E+00 7.70E+00 WG 143 L12965-03 9/12/2007 Cs-137 -2.OOE+00 2.OOE+00 7.60E+00 WG 143 L12965-03 9/12/2007 Fe-59 4.70E+00 2.80E+00 9.10E+00 WG 143 L12965-03 9/12/2007 GROSSBETA 7.30E+00 1.20E+00 2.70E+00 WG 143 L12965-03 9/12/2007 H-3 7.80E+02 4.40E+02 1.20E+03 WG 143 L12965-03 9/12/2007 1-131 -5,20E+00 3.60E+00 1.40E+01 WG 143 L12965-03 9/12/2007 K-40 -1.00E+01 2.60E+01 9.80E+01 WG 143 L12965-03 9/12/2007 La-140 -2.1OE+00 3.10E+00 1.30E+01 WG 143 L12965-03 9/12/2007 Mn-54 -2.90E+00 1.90E+00 7.70E+00 WG 143 L12965-03 9/12/2007 Nb-95 2.30E+00 2.20E+00 7.40E+00 WG 143 L12965-03 9/12/2007 Ru-103 -7.OOE-01 2.1OE+00 7.60E+00 WG 143 L12965-03 9/12/2007 Ru-106 -1,1OE+01 1.60E+01 6.10E+01 WG 143 L12965-03 9/12/2007 Sb-124 8.OOE-01 5.30E+00 2.OOE+01 WG 143 L12965-03 9/12/2007 Sb-125 -2.50E+00 4.80E+00 1.80E+01 WG 143 L12965-03 9/12/2007 Se-75 -6.OOE-01 2.30E+00 8.1OE+00 WG 143 L12965-03 9/12/2007 Zn-65 -6,40E+00 4.30E+00 1.70E+01 WG 143 L12965-03 9/12/2007 Zr-95 -4.80E+00 3.50E+00 1.40E+01 WG 143 L13338-03 12/5/2007 AcTh-228 -1.06E+01 6.60E+00 2.40E+01 WG 143 L13338-03 12/5/2007 Ag-108m 8.OOE-01 1.1OE+00 3.70E+00 WG 143 L13338-03 12/5/2007 Ag-0mrn 7.OOE-01 2.OOE+00 6.80E+00 WG 143 L13338-03 12/5/2007 Ba-140 -3.OOE-01 3.70E+00 1.40E+01 WG 143 L13338-03 12/5/2007 Be-7 -9.OOE+00 1.20E+01 4.40E+01 WG 143 L13338-03 12/5/2007 Ce-141 -9.60E+00 3.40E+00 1.20E+01 WG 143 L13338-03 12/5/2007 Ce-144 -9.80E+00 6.80E+00 2.40E+01 WG 143 L13338-03 12/5/2007 Co-57 3.30E-01 8.50E-01 2.90E+00 WG 143 L13338-03 12/5/2007 Co-58 -3.70E+00 1.60E+00 6.OOE+00 WG 143 L13338-03 12/5/2007 Co-60 1.80E+00 1.60E+00 5.40E+00 WG 143 L13338-03 12/5/2007 Cr-51 -2.20E+01 1.20E+01 4.40E+01 WG 143 L13338-03 12/5/2007 Cs-134 1.1OE+00 1.50E+00 5.10E+00 WG 143 L13338-03 12/5/2007 Cs-137 -8.00E-01 1.30E+00 4.70E+00 WG 143 L13338-03 12/5/2007 Fe-59 -1.00E+00 3.30E+00 1.20E+01 WG 143 L13338-03 12/5/2007 GROSS BETA 5.40E+00 1.1OE+00 3.OOE+00 WG 143 L13338-03 12/5/2007 H-3 -3.90E+02 3.1OE+02 9.50E+02

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-202-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 143 L13338-03 12/5/2007 1-131 1.30E+00 3.90E+00 1.30E+01 WG 143 L13338-03 12/5/2007 K-40 3.OOE+00 2.70E+01 9.30E+01 WG 143 L13338-03 12/5/2007 La-140 -3.OOE-01 3.70E+00 1.40E+01 WG 143 L13338-03 12/5/2007 Mn-54 -8.OOE-01 1.40E+00 5.10E+00 WG 143 L13338-03 12/5/2007 Nb-95 -1.00E+00 2.50E+00 8.60E+00 WG 143 L13338-03 12/5/2007 Ru- 103 -2.70E+00 1.50E+00 5.60E+00 WG 143 L13338-03 12/5/2007 Ru-106 -6.OOE+00 1.1OE+01 4.1OE+01 WG 143 L13338-03 12/5/2007 Sb-124 3.20E+00 3.80E+00 1.30E+01 WG 143 L13338-03 12/5/2007 Sb-125 2.20E+00 5.OOE+00 1.70E+01 WG 143 L13338-03 12/5/2007 Se-75 3.20E+00 1.50E+00 4.70E+00 WG 143 L13338-03 12/5/2007 Zn-65 -8.70E+00 6.20E+00 2.20E+0 1 WG 143 L13338-03 12/5/2007 Zr-95 -2.60E+00 2.70E+00 9.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-203-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L11962-01 1/22/2007 AcTh-228 1.28E+01 7. 1OE+00 2.30E+01 WS L11962-01 1/22/2007 Ag-108m 0.OOE+00 1.50E+00 5.40E+00 WS Li 1962-01 1/22/2007 Ag-ll0m 3.40E+00 2.40E+00 8.10E+00 WS LI 1962-01 1/22/2007 Ba-140 5.OOE-01 2.70E+00 1.00E+01 WS Li 1962-01 1/22/2007 Be-7 2.OOE+01 1.50E+01 5.OOE+01 WS Li 1962-01 1/22/2007 Ce-141 3.80E+00 2.90E+00 9.50E+00 WS, LI 1962-01 1/22/2007 Ce-144 8.50E+00 9.20E+00 3.10E+01 WS Li 1962-01 1/22/2007 Co-57 1.00E+00 1.20E+00 3.90E+00 WS LI 1962-01 1/22/2007 Co-58 -I.10E+00 1.90E+00 7.1OE+00 WS Li 1962-01 1/22/2007 Co-60 0.OOE+00 1.70E+00 6.30E+00 WS Li 1962-01 1/22/2007 Cr-51 -2.90E+01 1.70E+01 6.30E+01 WS Li 1962-01 1/22/2007 Cs-134 -1.00E+00 1.90E+00 7.OOE+00 WS Li 1962-01 1/22/2007 Cs-137 -1.50E+00 1.60E+00 6.20E+00 WS Li 1962-01 1/22/2007 Fe-59 -5.OOE-01 3.80E+00 1.40E+01 WS Li 1962-01 1/22/2007 1-131 -2.1 OE+00 3.30E+00 1.20E+01 WS Li 1962-01 1/22/2007 K-40 3.55E+02 4.1OE+01 9.OOE+01 WS Ll1962-01 1/22/2007 La-140 6.OOE-01 3.1OE+00 1.1 OE+0 1 WS Li 1962-01 1/22/2007 Mn-54 1.1OE+00 1.80E+00 6.40E+00 WS L11962-01 1/22/2007 Nb-95 -1.60E+00 2.20E+00 8.OOE+00 WS LI 1962-01 1/22/2007 Ru-103 -2.20E+00 2.1OE+00 7.60E+00 WS LI 1962-01 1/22/2007 Ru-106 - 1.00E+01 1.60E+01 6.OOE+01 WS Ll 1962-01 1/22/2007 Sb-124 -3.1 OE+00 3.30E+00 1.40E+01 WS L11962-01 1/22/2007 Sb-125 0.OOE+00 4.20E+00 1.50E+01 WS Li 1962-01 1/22/2007 Se-75 5.OOE-01 2.1OE+00 7.40E+00 WS LI 1962-01 1/22/2007 Zn-65 -5.50E+00 4.60E+00 1.70E+01 WS Ll 1962-01 1/22/2007 Zr-95 2.70E+00 3.30E+00 1.1 OE+0 1 WS L12093-01 2/20/2007 AcTh-228 4.20E+00 3. 1OE+00 1.20E+01 WS L12093-01 2/20/2007 Ag-108m 1.50E-01 5.60E-01 1.90E+00 WS L12093-01 2/20/2007 Ag-ll0m -1.90E+00 9.20E-01 3.30E+00 WS L12093-01 2/20/2007 Ba-140 -3.OOE-01 1.40E+00 4.90E+00 WS L12093-01 2/20/2007 Be-7 5.40E+00 5.80E+00 1.90E+01 WS L12093-01 2/20/2007 Ce-141 1.10E+00 1.30E+00 4.40E+00 WS L12093-01 2/20/2007 Ce-144 1.90E+00 3.90E+00 1.30E+01 WS L12093-01 2/20/2007 Co-57 2.10E-01 4.90E-01 1.60E+00 WS L12093-01 2/20/2007 Co-58 1.06E+00 7.OOE-01 2.30E+00 WS L12093-01 2/20/2007 Co-60 3.70E-01 7.30E-01 2.50E+00 WS L12093-01 2/20/2007 Cr-51 1.02E+01 7.OOE+00 2.30E+0I WS L12093-01 2/20/2007 Cs-134 1.90E-01 7.60E-01 2.60E+00 WS L12093-01 2/20/2007 Cs-137 -7.50E-01 6.70E-01 2.30E+00 WS L12093-01 2/20/2007 Fe-59 -2.OOE+00 1.60E+00 5.70E+00 WS L12093-01 2/20/2007 1-131 2.70E+00 1.90E+00 6.30E+00 WS L12093-01 2/20/2007 K-40 3.21E+02 1.70E+01 3.90E+01 WS L12093-01 2/20/2007 La-140 -3.OOE-01 1.60E+00 5.60E+00 WS L12093-01 2/20/2007 Mn-54 -1.31E+00 6.90E-01 2.50E+00 WS L12093-01 2/20/2007 Nb-95 1.70E+00 1.20E+00 4.1OE+00 WS L12093-01 2/20/2007 Ru-103 -2.88E+00 8.40E-01 3.OOE+00 WS L12093-01 2/20/2007 Ru-106 2.80E+00 6.50E+00 2.20E+01 WS L12093-01 2/20/2007 Sb-124 -1.60E+00 1.60E+00 6.OOE+00 WS L12093-01 2/20/2007 Sb-125 -8.OOE-01 1.70E+00 5.90E+00 WS L12093-01 2/20/2007 Se-75 -3.OOE-02 8.50E-01 2.90E+00 WS L12093-01 2/20/2007 Zn-65 -1.40E+00 1.50E+00 5.30E+00 WS L12093-01 2/20/2007 Zr-95 -I.30E+00 1.30E+00 4.50E+00 WS L12178-01 3/21/2007 AcTh-228 2.60E+00 8.90E+00 3.20E+01 WS L12178-01 3/21/2007 Ag-108m 0.OOE+00 1.50E+00 5.60E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-204-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12178-01 3/21/2007 Ag- I1Oim 2.20E+00 3.30E+00 1.1 OE+0 1 WS L12178-01 3/21/2007 Ba-140 8.OOE-01 3.70E+00 1.40E+01 WS L12178-01 3/21/2007 Be-7 -3.30E+01 1.60E+01 6.50E+01 WS L12178-01 3/21/2007 Ce- 141 -6.40E+00 3.OOE+00 1.1OE+01 WS L12178-01 3/21/2007 Ce-144 3.OOE+00 1.OOE+01 3.60E+0I WS L12178-01 3/21/2007 Co-57 -1.00E-01 1.30E+00 4.60E+00 WS L12178-01 3/21/2007 Co-58 -1.30E+00 2.OOE+00 7.70E+00 WS L12178-01 3/21/2007 Co-60 1.80E+00 2.20E+00 7.70E+00 WS L12178-01 3/21/2007 Cr-51 -5.OOE+00 1.90E+01 6.80E+01 WS L12178-01 3/21/2007 Cs-134 -4.OOE-01 2.1OE+00 7.80E+00 WS L12178-01 3/21/2007 Cs-137 4.30E+00 2.OOE+00 6.30E+00 WS L12178-01 3/21/2007 Fe-59 -4.60E+00 4.80E+00 1.90E+01 WS L12178-01 3/21/2007 1-131 4.50E+00 3.90E+00 1.30E+01 WS L12178-01 3/21/2007 K-40 2.14E+02 4.30E+0I 1.1OE+02 WS L12178-01 3/21/2007 La-140 9.OOE-01 4.30E+00 1.60E+01 WS L12178-01 3/21/2007 Mn-54 3.OOE-01 2.OOE+00 7.20E+00 WS L12178-01 3/21/2007 Nb-95 -2.60E+00 2.30E+00 9.OOE+00 WS L12178-01 3/21/2007 Ru-103 5.OOE-01 1.90E+00 6.80E+00 WS L12178-01 3/21/2007 Ru-106 -7.OOE+00 2.OOE+01 7.50E+01 WS L12178-01 3/21/2007 Sb-124 -9.90E+00 5.OOE+00 2.30E+0I WS L12178-01 3/21/2007 Sb-125 2.40E+00 5. 1OE+00 1.80E+01 WS L12178-01 3/21/2007 Se-75 -6.OOE-01 2.30E+00 8.30E+00 WS L12178-01 3/21/2007 Zn-65 -9.30E+00 4.30E+00 1.90E+01 WS L12178-01 3/21/2007 Zr-95 -3.OOE-01 3.1OE+00 1.20E+01 WS L12282-01 3/21/2007 H-3 -8.50E+02 4.70E+02 1.60E+03 WS L12367-01 4/24/2007 AcTh-228 6.OOE-01 5.50E+00 2.10E+01 WS L12367-01 4/24/2007 Ag-108m -6.OOE-01 1.30E+00 4.80E+00 WS L12367-01 4/24/2007 Ag-il0m -3.70E+00 1.90E+00 8.50E+00 WS L12367-01 4/24/2007 Ba-140 1.80E+00 2.90E+00 1.10E+01 WS L12367-01 4/24/2007 Be-7 1.90E+01 1.40E+01 4.80E+01 WS L12367-01 4/24/2007 Ce-141 -5.90E+00 2.80E+00 1.1OE+0I WS L12367-01 4/24/2007 Ce- 144 -5.30E+00 9.10E+00 3.30E+01 WS L12367-01 4/24/2007 Co-57 1.1OE+00 1.20E+00 4.OOE+00 WS L12367-01 4/24/2007 Co-58 5.O0E-01 1.50E+00 5.60E+00 WS L12367-01 4/24/2007 Co-60 -2.80E+00 1.50E+00 7.1OE+00 WS L12367-01 4/24/2007 Cr-51 1.80E+01 1.80E+01 6.OOE+01 WS L12367-01 4/24/2007 Cs-134 5.OOE-01 1.40E+00 5.40E+00 WS L12367-01 4/24/2007 Cs-137 -1.10E+00 1.70E+00 6.70E+00 WS L12367-01 4/24/2007 Fe-59 -3.OOE+00 3.OOE+00 1.30E+01 WS L12367-01 4/24/2007 1-131 6.30E+00 4.30E+00 1.40E+0I WS L12367-01 4/24/2007 K-40 2.32E+02 4.1OE+01 1.00E+02 WS L12367-01 4/24/2007 La-140 2.1OE+00 3.30E+00 1.30E+01 WS L12367-01 4/24/2007 Mn-54 -2.30E+00 1.40E+00 6.20E+00 WS L12367-01 4/24/2007 Nb-95 2.60E+00 1.80E+00 6.10E+00 WS L12367-01 4/24/2007 Ru- 103 -2.10E+00 1.70E+00 6.80E+00 WS L12367-01 4/24/2007 Ru-106 -1.00E+01 1.20E+01 5.OOE+01 WS L12367-01 4/24/2007 Sb-124 2.30E+00 3.20E+00 1.20E+01 WS L12367-01 4/24/2007 Sb-125 -2.30E+00 4.30E+00 1.60E+01 WS L12367-01 4/24/2007 Se-75 -1.50E+00 2.OOE+00 7.30E+00 WS L12367-01 4/24/2007 Zn-65 2.OOE+00 3.20E+00 1.20E+01 WS L12367-01 4/24/2007 Zr-95 2.OOE+00 2.70E+00 9.70E+00 WS L12462-01 5/22/2007 AcTh-228 -4.OOE+00 7.90E+00 2.90E+01 WS L12462-01 5/22/2007 Ag-108m 9.OOE-01 1.40E+00 4.80E+00 WS L12462-01 5/22/2007 Ag-110m 1.80E+00 2.OOE+00 6.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-205-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCilkg) (pCi/kg) (pCi/kg)

WS L12462-01 5/22/2007 Ba-140 -1.90E+00 3.40E+00 1.30E+01 WS L12462-01 5/22/2007 Be-7 -9.OOE+00 1.30E+01 4.90E+01 WS L12462-01 5/22/2007 Ce-141 -2.20E+00 2.50E+00 8.70E+00 WS L12462-01 5/22/2007 Ce-144 -9.20E+00 7.1OE+00 2.60E+01 WS L12462-01 5/22/2007 Co-57 4.OOE-01 1.00E+00 3.50E+00 WS L12462-01 5/22/2007 Co-58 -2.30E+00 1.80E+00 7.10E+00 WS L12462-01 5/22/2007 Co-60 -2.90E+00 2.OOE+00 8.30E+00 WS L12462-01 5/22/2007 Cr-51 1.20E+01 1.40E+01 4.90E+01 WS L12462-01 5/22/2007 Cs-134 1.30E+00 1.90E+00 6.80E+00 WS L12462-01 5/22/2007 Cs-137 1.80E+00 1.60E+00 5.40E+00 WS L12462-01 5/22/2007 Fe-59 -2.50E+00 3.90E+00 1.50E+01 WS L12462-01 5/22/2007 1-131 -7.80E+00 2.60E+00 1.1OE+01 WS L12462-01 5/22/2007 K-40 1.97E+02 4.10E+01 1.1OE+02 WS L12462-01 5/22/2007 La-140 -2.20E+00 3.90E+00 1.50E+01 WS L12462-01 5/22/2007 Mn-54 -5.OOE-01 1.80E+00 6.80E+00 WS L12462-01 5/22/2007 Nb-95 4.OOE-01 2.20E+00 7.80E+00 WS L12462-01 5/22/2007 Ru-103 2.50E+00 1.80E+00 5.90E+00 WS L12462-01 5/22/2007 Ru-106 -1.10E+01 1.40E+01 5.30E+01 WS L12462-01 5/22/2007 Sb-124 -1.00E+00 4.80E+00 1.90E+01 WS L12462-01 5/22/2007 Sb-125 3.50E+00 4.70E+00 1.60E+01 WS L12462-01 5/22/2007 Se-75 1.30E+00 1.60E+00 5.60E+00 WS L12462-01 5/22/2007 Zn-65 -5.OOE+00 4.OOE+00 1.60E+01 WS L12462-01 5/22/2007 Zr-95 1.60E+00 3.20E+00 1.1OE+0I WS L12575-01 6/18/2007 AcTh-228 5.20E+00 5.90E+00 2.OOE+01 WS L12575-01 6/18/2007 Ag-108m -6.OOE-01 1.1 OE+00 4.IOE+00 WS L12575-01 6/18/2007 Ag- l10m -1.00E+00 2.OOE+00 7.40E+00 WS L12575-01 6/18/2007 Ba-140 -4.30E+00 2.10E+00 8.90E+00 WS L12575-01 6/18/2007 Be-7 -2.60E+01 1.40E+01 5.1 OE+0 1 WS L12575-01 6/18/2007 Ce-141 -7.OOE-01 2.60E+00 8.80E+00 WS L12575-01 6/18/2007 Ce-144 3.70E+00 7.80E+00 2.70E+0I WS L12575-01 6/18/2007 Co-57 8.90E-01 9.60E-01 3.20E+00 WS L12575-01 6/18/2007 Co-58 -1.40E+00 1.20E+00 4.70E+00 WS L12575-01 6/18/2007 Co-60 -1.60E+00 1.30E+00 5.20E+00 WS L12575-01 6/18/2007 Cr-51 -5.OOE+00 1.40E+01 4.90E+01 WS L12575-01 6/18/2007 Cs-134 2.OOE-01 1.60E+00 5.70E+00 WS L12575-01 6/18/2007 Cs-137 1.50E+00 1.40E+00 4.70E+00 WS L12575-01 6/18/2007 Fe-59 -3.40E+00 3.20E+00 1.20E+01 WS L12575-01 6/18/2007 1-131 -9.OOE-01 3.1OE+00 1.1OE+0I WS L12575-01 6/18/2007 K-40 2.45E+02 3.30E+0I 8.70E+01 WS L12575-01 6/18/2007 La-140 -4.90E+00 2.40E+00 1.00E+01 WS L12575-01 6/18/2007 Mn-54 -2.OOE+00 1.40E+00 5.20E+00 WS L12575-01 6/18/2007 Nb-95 8.OOE-01 1.80E+00 6.30E+00 WS L12575-01 6/18/2007 Ru-103 -1.30E+00 1.60E+00 5.90E+00 WS L12575-01 6/18/2007 Ru- 106 -2.40E+0 I 1.30E+01 5.OOE+01 WS L12575-01 6/18/2007 Sb-124 1.60E+00 3.30E+00 1.20E+01 WS L12575-01 6/18/2007 Sb-125 -9.OOE-01 3.50E+00 1.20E+01 WS L12575-01 6/18/2007 Se-75 8.OOE-01 1.80E+00 6.1OE+00 WS L12575-01 6/18/2007 Zn-65 1.30E+00 2.90E+00 1.00E+01 WS L12575-01 6/18/2007 Zr-95 5.OOE-01 2.40E+00 8.50E+00 WS L12740-01 7/24/2007 AcTh-228 -1.60E+00 6.30E+00 2.30E+01 WS L12740-01 7/24/2007 Ag-108m 1.70E+00 1.60E+00 5.50E+00 WS L12740-01 7/24/2007 Ag-li0m -2.70E+00 2.1OE+00 8.20E+00 WS L12740-01 7/24/2007 Ba-140 0.00E+00 2.20E+00 8.50E+00 WS L12740-01 7/24/2007 Be-7 -7.OOE+00 1.70E+01 6.OOE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-206-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12740-01 7/24/2007 Ce-141 -5.1 OE+00 3.OOE+00 1.10E+01 WS L12740-01 7/24/2007 Ce-144 -1.89E+01 9.OOE+00 3.30E+01 WS L12740-01 7/24/2007 Co-57 1.70E+00 1.20E+00 4.OOE+00 WS L12740-01 7/24/2007 Co-58 4.OOE-01 1.70E+00 6.20E+00 WS L12740-01 7/24/2007 Co-60 -8.OOE-01 1.70E+00 6.70E+00 WS L12740-01 7/24/2007 Cr-51 1.00E+00 1.60E+01 5.70E+01 WS L12740-01 7/24/2007 Cs-134 1.90E+00 2. 1OE+00 7.10E+00 WS L12740-01 7/24/2007 Cs-137 0.OOE+00 1.70E+00 6.OOE+00 WS L12740-01 7/24/2007 Fe-59 -4.80E+00 3.80E+00 1.50E+01 WS L12740-01 7/24/2007 1-131 -3.30E+00 3.70E+00 1.40E+01 WS L12740-01 7/24/2007 K-40 3.3 1E+02 3.90E+01 8.60E+01 WS L12740-01 7/24/2007 La-140 0.OOE+00 2.50E+00 9.70E+00 WS L12740-01 7/24/2007 Mn-54 2.50E+00 1.70E+00 5.70E+00 WS L12740-01 7/24/2007 Nb-95 -1.20E+00 1.80E+00 6.90E+00 WS L12740-01 7/24/2007 Ru-103 -3.OOE-01 2.OOE+00 7.1OE+00 WS L12740-01 7/24/2007 Ru-106 -1.00E+00 1.60E+01 5.80E+01 WS L12740-01 7/24/2007 Sb- 124 3.1OE+00 4. 1OE+00 1.50E+01 WS L12740-01 7/24/2007 Sb-125 7.40E+00 4.30E+00 1.40E+01 WS L12740-01 7/24/2007 Se-75 -1.40E+00 2.OOE+00 7.30E+00 WS L12740-01 7/24/2007 Zn-65 -5.40E+00 3.90E+00 1.50E+01 WS L12740-01 7/24/2007 Zr-95 4.OOE-01 3.30E+00 1.20E+01 WS L12792-01 6/18/2007 H-3 6.OOE+01 4.30E+02 1.30E+03 WS L12888-01 8/21/2007 AcTh-228 1.00E+00 6.40E+00 2.20E+01 WS L12888-01 8/21/2007 Ag-108m -2.20E-01 8.1OE-01 2.80E+00 WS L12888-01 8/21/2007 Ag-il0mn 2.1OE+00 1.30E+00 4.20E+00 WS L12888-01 8/21/2007 Ba-140 -1.70E+00 2.80E+00 1.1OE+01 WS L12888-01 8/21/2007 Be-7 -5.OOE+00 9.40E+00 3.30E+01 WS L12888-01 8/21/2007 Ce-141 6.OOE-01 1.80E+00 6.20E+00 WS L12888-01 8/21/2007 Ce-144 -3.OOE-01 4.20E+00 1.40E+01 WS L12888-01 8/21/2007 Co-57 7.80E-01 7.70E-01 2.60E+00 WS L12888-01 8/21/2007 Co-58 -1.00E-01 1.10E+00 4.1OE+00 WS L12888-01 8/21/2007 Co-60 -4.00E-01 1.40E+00 5.OOE+00 WS L12888-01 8/21/2007 Cr-51 1.17E+0 1 9.60E+00 3.20E+01 WS L12888-01 8/21/2007 Cs-134 -2.0OE+00 1.20E+00 4.60E+00 WS L12888-01 8/21/2007 Cs-137 5.OOE-01 9.60E-01 3.30E+00 WS L12888-01 8/21/2007 Fe-59 -2.80E+00 2.60E+00 9.80E+00 WS L12888-01 8/21/2007 1-131 3.90E+00 3.30E+00 1.10E+01 WS L12888-01 8/21/2007 K-40 2.30E+02 2.80E+01 7.50E+01 WS L12888-01 8/21/2007 La- 140 -2.OOE+00 3.20E+00 1.20E+01 WS L12888-01 8/21/2007 Mn-54 3.OOE-01 1.00E+00 3.50E+00 WS L12888-01 8/21/2007 Nb-95 7.OOE-01 1.40E+00 4.70E+00 WS L12888-01 8/21/2007 Ru-103 -7.OOE-01 1.30E+00 4.50E+00 WS L12888-01 8/21/2007 Ru-106 -3.50E+00 8.90E+00 3.20E+01 WS L12888-01 8/21/2007 Sb-124 4.OOE-01 3.1OE+00 2.10E+01 WS L12888-01 8/21/2007 Sb-125 -8.OOE-01 2.70E+00 9.40E+00 WS L12888-01 8/21/2007 Se-75 -5.OOE-01 1.10E+00 4.OOE+00 WS L12888-01 8/21/2007 Zn-65 1.40E+00 2.30E+00 8.10E+00 WS L12888-01 8/21/2007 Zr-95 -3.OOE-01 2.20E+00 7.60E+00 WS L12977-01 9/17/2007 AcTh-228 6.80E+00 6.70E+00 2.30E+01 WS L12977-01 9/17/2007 Ag-108m -2.OOE-01 1.60E+00 5.60E+00 WS L12977-01 9/17/2007 Ag-110m 6.OOE-01 2.OOE+00 7.10E+00 WS L12977-01 9/17/2007 Ba-140 -5.OOE-01 2.60E+00 9.90E+00 WS L12977-01 9/17/2007 Be-7 -5.OOE+00 1.60E+01 5.90E+01 WS L12977-01 9/17/2007 Ce-141 3.20E+00 2.90E+00 9.60E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-207-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12977-01 9/17/2007 Ce-144 -3.OOE+00 1.1OE+01 3.70E+01 WS L12977-01 9/17/2007 Co-57 1.40E+00 1.20E+00 4.OOE+00 WS L12977-01 9/17/2007 Co-58 -1.40E+00 1.80E+00 6.90E+00 WS L12977-01 9/17/2007 Co-60 2.20E+00 1.70E+00 5.60E+00 WS L12977-01 9/17/2007 Cr-51 -1.10E+01 1.60E+01 5.90E+01 WS L12977-01 9/17/2007 Cs-134 5.OOE-01 1.80E+00 6.60E+00 WS L12977-01 9/17/2007 Cs-137 4.OOE-01 1.70E+00 6.OOE+00 WS L12977-01 9/17/2007 Fe-59 -6.30E+00 3.60E+00 1.50E+01 WS L12977-01 9/17/2007 1-131 3.OOE-01 3.1OE+00 1.1OE+01 WS L12977-01 9/17/2007 K-40 2.88E+02 3.90E+01 9.30E+01 WS L12977-01 9/17/2007 La-140 -6.OOE-01 3.OOE+00 1.1OE+01 WS L12977-01 9/17/2007 Mn-54 -3.OOE+00 1.70E+00 6.70E+00 WS L12977-01 9/17/2007 Nb-95 -1.20E+00 1.90E+00 7.1OE+00 WS L12977-01 9/17/2007 Ru-103 -4.10E+00 2.OOE+00 7.70E+00 WS L12977-01 9/17/2007 Ru-106 0.OOE+00 1.70E+01 6.OOE+01 WS L12977-01 9/17/2007 Sb-124 2.40E+00 3.90E+00 1.40E+01 WS L12977-01 9/17/2007 Sb-125 6.30E+00 4.70E+00 1.60E+01.

WS L12977-01 9/17/2007 Se-75 5.OOE-01 2.20E+00 7.50E+00 WS L12977-01 9/17/2007 Zn-65 2.90E+00 3.80E+00 1.30E+01 WS L12977-01 9/17/2007 Zr-95 -3.50E+00 3.OOE+00 1.20E+01 WS L13151-01 9/17/2007 H-3 -5.OOE+01 4.50E+02 1.40E+03 WS L13159-01 10/22/2007 AcTh-228 4.30E+00 7.50E+00 2.60E+01 WS L13159-01 10/22/2007 Ag-108m 7.OOE-01 1.80E+00 6.1OE+00 WS L13159-01 10/22/2007 Ag-110m -6.80E+00 2.50E+00 1.00E+01 WS L13159-01 10/22/2007 Ba-140 2.70E+00 2.90E+00 1.00E+01 WS L13159-01 10/22/2007 Be-7 2.90E+01 1.80E+01 5.80E+01 WS L13159-01 10/22/2007 Ce-141 3.60E+00 3.40E+00 1.1OE+01 WS L13159-01 10/22/2007 Ce- 144 1.40E+01 1.00E+01 3.50E+01 WS L13159-01 10/22/2007 Co-57 2.OOE-01 1.30E+00 4.50E+00 WS L13159-01 10/22/2007 Co-58 -2.50E+00 2.OOE+00 7.60E+00 WS L13159-01 10/22/2007 Co-60 -2.00E-01 1.90E+00 7.OOE+00 WS L13159-01 10/22/2007 Cr-51 3.30E+01 1.90E+01 6.OOE+01 WS L13159-01 10/22/2007 Cs-134 1.40E+00 2.OOE+00 7.10E+00 WS L13159-01 10/22/2007 Cs-137 -3.90E+00 2.OOE+00 7.80E+00 WS L13159-01 10/22/2007 Fe-59 -3.70E+00 4.40E+00 1.60E+01 WS L13159-01 10/22/2007 1-131 -5.50E+00 3.40E+00 1.30E+01 WS L13159-01 10/22/2007 K-40 3.18E+02 4.30E+01 1.1OE+02 WS L13159-01 10/22/2007 La- 140 2.70E+00 2.90E+00 1.00E+01 WS L13159-01 10/22/2007 Mn-54 -1.70E+00 2.OOE+00 7.50E+00 WS L13159-01 10/22/2007 Nb-95 1.50E+00 3.50E+00 1.20E+01 WS L13159-01 10/22/2007 Ru-103 1.90E+00 2.20E+00 7.40E+00 WS L13159-01 10/22/2007 Ru-106 2.1OE+01 1.60E+01 5.20E+01 WS L13159-01 10/22/2007 Sb-124 8.OOE-01 4.20E+00 1.60E+01 WS L13159-01 10/22/2007 Sb-125 -4.50E+00 5.OOE+00 1.80E+01 WS L13159-01 10/22/2007 Se-75 -3.OOE+00 2.40E+00 8&60E+00 WS L13159-01 10/22/2007 Zn-65 2.01E+01 8.20E+00 2.60E+01 WS L13159-01 10/22/2007 Zr-95 3.50E+00 3.40E+00 1,10E+01 WS L13300-01 11/26/2007 AcTh-228 0.OOE+00 7. 1OE+00 2.50E+01 WS L13300-01 11/26/2007 Ag-108m 1.40E+00 1.70E+00 5.80E+00 WS L13300-01 11/26/2007 Ag-110m 6.OOE-01 2.20E+00 8.1OE+00 WS L13300-01 11/26/2007 Ba-140 6.OOE-01 3.20E+00 1.20E+01 WS L13300-01 11/26/2007 Be-7 3.OOE+00 1.60E+01 5.70E+01 WS L13300-01 11/26/2007 Ce-141 -5.10E+00 4. 1OE+00 1.50E+01 WS L13300-01 11/26/2007 Ce-144 4.20E+00 9.30E+00 3.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-208-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L13300-01 11/26/2007 Co-57 1.00E+00 1.20E+00 4.20E+00 WS L13300-01 11/26/2007 Co-58 2.OOE-01 1.80E+00 6.40E+00 WS L13300-01 11/26/2007 Co-60 1.60E+00 1.70E+00 5.70E+00 WS L13300-01 11/26/2007 Cr-51 -5.OOE+00 1.60E+01 5.80E+01 WS L13300-01 11/26/2007 Cs-134 -2.60E+00 1.90E+00 7.50E+00 WS L13300-01 11/26/2007 Cs-137 -2.40E+00 1.70E+00 6.60E+00 WS L13300-01 11/26/2007 Fe-59 -4.40E+00 3.90E+00 1.50E+01 WS L13300-01 11/26/2007 1-131 -9.OOE-01 3.50E+00 1.20E+01 WS L13300-01 11/26/2007 K-40 3.23E+02 4.OOE+01 9.1OE+01 WS L13300-01 11/26/2007 La-140 6.OOE-01 3.20E+00 1.20E+01 WS L13300-01 11/26/2007 Mn-54 1.30E+00 1.90E+00 6.50E+00 WS L13300-01 11/26/2007 Nb-95 -2.OOE-01 2.OOE+00 7.30E+00 WS L13300-01 11/26/2007 Ru-103 -1.70E+00 2.OOE+00 7.40E+00 WS L13300-01 11/26/2007 Ru-106 -1.50E+01 1.70E+01 6.30E+01 WS L13300-01 11/26/2007 Sb-124 0.OOE+00 4.20E+00 1.60E+01 WS L13300-01 11/26/2007 Sb-125 1.80E+00 4.60E+00 1.60E+01 WS L13300-01 11/26/2007 Se-75 1.00E+00 2.1OE+00 7.40E+00 WS L13300-01 11/26/2007 Zn-65 -1.80E+00 4.1OE+00 1.50E+01 WS L13300-01 11/26/2007 Zr-95 1.60E+00 3.1OE+00 1.1OE+01 WS L13425-01 12/18/2007 AcTh-228 3.90E+00 3.30E+00 1.40E+01 WS L13425-01 12/18/2007 Ag-108m 9.30E-01 6.OOE-01 2.OOE+00 WS L13425-01 12/18/2007 Ag-110in -1.60E+00 1.00E+00 3.70E+00 WS L13425-01 12/18/2007 Ba-140 -7.OOE-01 2.70E+00 9.50E+00 WS L13425-01 12/18/2007 Be-7 -1.60E+00 7. 1OE+00 2.40E+01 WS L13425-01 12/18/2007 Ce-141 2.OOE-01 1.80E+00 6.10E+00 WS L13425-01 12/18/2007 Ce-144 -4.50E+00 4.20E+00 1.40E+01 WS L13425-01 12/18/2007 Co-57 5.10E-01 5.40E-01 1.80E+00 WS L13425-01 12/18/2007 Co-58 -1.90E-01 8.70E-01 3.OOE+00 WS L13425-01 12/I 8/2007 Co-60 5.60E-01 8.OOE-01 2.70E+00 WS L13425-01 12/18/2007 Cr-51 -1.70E+00 9.40E+00 3.20E+01 WS L13425-01 12/18/2007 Cs-134 6.30E-01 8.40E-01 2.80E+00 WS L13425-01 12/18/2007 Cs-137 1.00E-01 7.IOE-01 2.40E+00 WS L13425-01 12/18/2007 Fe-59 1.40E+00 2.OOE+00 6.80E+00 WS L13425-01 12/18/2007 1-131 3.80E+00 4.30E+00 1.40E+01 WS L13425-01 12/18/2007 K-40 3.51E+02 2.OOE+01 5.OOE+01 WS L13425-01 12/18/2007 La-140 -7.OOE-01 2.70E+00 9.50E+00 WS L13425-01 12/18/2007 Mn-54 -2.10E-01 7.80E-01 2.70E+00 WS L13425-01 12/18/2007 Nb-95 2.OOE+00 1.80E+00 5.90E+00 WS L13425-01 12/18/2007 Ru-103 -2.OOE-01 1.1 OE+00 3.60E+00 WS L13425-01 12/18/2007 Ru-106 3.30E+00 7.30E+00 2.50E+01 WS L13425-01 12/18/2007 Sb-124 5.OOE-01 2.OOE+00 7.OOE+00 wS L13425-01 12/18/2007 Sb-125 -2.50E+00 1.90E+00 6.60E+00 WS L13425-01 12/18/2007 Se-75 5.10E-01 9.80E-01 3.30E+00 WS L13425-01 12/18/2007 Zn-65 -2.1 OE+00 1.70E+00 6.1OE+00 WS L13425-01 12/18/2007 Zr-95 1.60E+00 1.50E+00 5.OOE+00 WS L13448-01 12/18/2007 H-3 5.OOE+02 4.40E+02 1.30E+03 WS L12462-04 5/24/2007 AcTh-228 -7.OOE-01 7.30E+00 2.60E+01 WS L12462-04 5/24/2007 Ag-108m -7.OOE-01 1.40E+00 5.10E+00 WS L12462-04 5/24/2007 Ag-110n -6.OOE-01 2.50E+00 9.1OE+00 WS L12462-04 5/24/2007 Ba-140 -6.OOE-01 3.20E+00 1.20E+01 WS L12462-04 5/24/2007 Be-7 1.30E+01 1.50E+01 5.OOE+01 WS L12462-04 5/24/2007 Ce-141 1.00E+00 3.1OE+00 1.1OE+01 WS L12462-04 5/24/2007 Ce- 144 -4.60E+00 9.30E+00 3.30E+01 WS L12462-04 5/24/2007 Co-57 2.30E+00 1.20E+00 3.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-209-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12462-04 5/24/2007 Co-58 -2.70E+00 1.80E+00 7.1OE+00 WS L12462-04 5/24/2007 Co-60 -2.10E+00 1.70E+00 7.10E+00 WS L12462-04 5/24/2007 Cr-51 2.OOE+01 1.70E+01 5.60E+01 WS L12462-04 5/24/2007 Cs-134 2.OOE-01 1.90E+00 7.OOE+00 WS L12462-04 5/24/2007 Cs-137 3.40E+00 1.80E+00 5.90E+00 WS L12462-04 5/24/2007 Fe-59 5.OOE+00 4.OOE+00 1.40E+01 WS L12462-04 5/24/2007 H-3 -1.30E+02 2.50E+02 7.80E+02 WS L12462-04 5/24/2007 1-131 -4.20E+00 3.90E+00 1.40E+01 WS L12462-04 5/24/2007 K-40 1.17E+02 3.30E+01 9.80E+0 1 WS L12462-04 5/24/2007 La-140 -6.OOE-01 3.70E+00 1.40E+01 WS L12462-04 5/24/2007 Mn-54 -3.20E+00 1.60E+00 6.60E+00 WS L12462-04 5/24/2007 Nb-95 2.90E+00 2.1OE+00 6.90E+00 WS L12462-04 5/24/2007 Ru-103 -2.OOE-01 1.90E+00 6.80E+00 WS L12462-04 5/24/2007 Ru-106 3.OOE+00 1.70E+01 5.80E+01 WS L12462-04 5/24/2007 Sb-124 -9.80E+00 3.60E+00 1.70E+01 WS L12462-04 5/24/2007 Sb-125 4.OOE-01 4.30E+00 1.50E+01 WS L12462-04 5/24/2007 Se-75 4.1OE+00 2. 1OE+00 6.70E+00 WS L12462-04 5/24/2007 Zn-65 -2.10E+00 3.80E+00 1.40E+01 WS L12462-04 5/24/2007 Zr-95 -4.OOE-01 3.20E+00 1.20E+01 WS L13300-04 11/20/2007 AcTh-228 6.OOE-01 3.50E+00 1.20E+0I WS L13300-04 11/20/2007 Ag-108m -2.06E+00 9.70E-01 3.70E+00 WS L13300-04 11/20/2007 Ag-110m 5.OOE-01 1.40E+00 4.80E+00 WS L13300-04 11/20/2007 Ba-140 1.30E+00 2.20E+00 8.OOE+00 WS L13300-04 11/20/2007 Be-7 1.90E+00 9.90E+00 3.50E+01 WS L13300-04 11/20/2007 Ce-141 -2.50E+00 2.10E+00 7.50E+00 WS L13300-04 11/20/2007 Ce- 144 3.10E+00 6.80E+00 2.30E+01 WS L13300-04 11/20/2007 Co-57 -3.OOE-01 8.30E-01 2.90E+00 WS L13300-04 11/20/2007 Co-58 -8.OOE-01 1.1OE+00 4.30E+00 WS L13300-04 11/20/2007 Co-60 2.47E+00 9.90E-01 2.90E+00 WS L13300-04 11/20/2007 Cr-51 9.OOE+00 1.1 OE+0 1 3.70E+01 WS L13300-04 11/20/2007 Cs-134 1.00E-01 1.1OE+00 3.80E+00 WS L13300-04 11/20/2007 Cs-137 1.53E+00 9.50E-01 3.1OE+00 WS L13300-04 11/20/2007 Fe-59 6.20E+00 2.50E+00 7.90E+00 WS L13300-04 11/20/2007 H-3 -1.70E+02 4.50E+02 1.40E+03 WS L13300-04 11/20/2007 1-131 0.OOE+00 3.50E+00 1.20E+01 WS L13300-04 11/20/2007 K-40 2.18E+02 2.30E+01 4.60E+01 WS L13300-04 11/20/2007 La-140 1.30E+00 2.20E+00 8.OOE+00 WS L13300-04 11/20/2007 Mn-54 2.40E-01 9.OOE-01 3.20E+00 WS L13300-04 11/20/2007 Nb-95 2.80E+00 1.30E+00 4.20E+00 WS L13300-04 11/20/2007 Ru-103 -6.OOE-01 1.30E+00 4.60E+00 WS L13300-04 11/20/2007 Ru-106 -1.55E+01 9.OOE+00 3.50E+01 WS L13300-04 11/20/2007 Sb-124 1.40E+00 2.OOE+00 7.20E+00 WS L13300-04 11/20/2007 Sb-125 -3.40E+00 2.70E+00 1.00E+01 WS L13300-04 11/20/2007 Se-75 -6.OOE-01 1.40E+00 4.80E+00 WS L13300-04 11/20/2007 Zn-65 -6.60E+00 2.40E+00 9.90E+00 WS L13300-04 11/20/2007 Zr-95 2.10OE+00 1.80E+00 6.OOE+00 WS Li 1962-02 1/22/2007 AcTh-228 -6.70E+00 6.70E+00 2.50E+01 WS Li 1962-02 1/22/2007 Ag-108m 5.OOE-01 1.40E+00 4.90E+00 WS Li 1962-02 1/22/2007 Ag-110m 2.80E+00 2. 1OE+00 7.OOE+00 WS Li 1962-02 1/22/2007 Ba-140 4.OOE-01 2.50E+00 9.30E+00 WS Li1962-02 1/22/2007 Be-7 1.1OE+01 1.30E+01 4.50E+01 WS Li 1962-02 1/22/2007 Ce- 141 -4.50E+00 2.60E+00 9.30E+00 WS Li1962-02 1/22/2007 Ce- 144 -2.80E+00 9.20E+00 3.20E+01 WS Li1962-02 1/22/2007 Co-57 -5.OOE-01 1.20E+00 4.1OE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-210-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS Li1962-02 1/22/2007 Co-58 -1.60E+00 2.OOE+00 7.40E+00 WS LI 1962-02 1/22/2007 Co-60 1.40E+00 1.80E+00 6.40E+00 WS Li 1962-02 1/22/2007 Cr-51 -4.OOE+00 1.50E+01 5.30E+01 WS Li 1962-02 1/22/2007 Cs-134 0.OOE+00 1.80E+00 6.60E+00 WS Li 1962-02 1/22/2007 Cs-137 -1.90E+00 1.60E+00 6.1OE+00 WS Li 1962-02 1/22/2007 Fe-59 -1.10E+00 3.80E+00 1.40E+OI WS Li 1962-02 1/22/2007 1-131 2.80E+00 3.OOE+00 1.00E+01 WS Li 1962-02 1/22/2007 K-40 2.74E+02 3.70E+01 8.90E+0I WS Ll 1962-02 1/22/2007 La- 140 5.OOE-01 2.90E+00 1.10E+01 WS Li 1962-02 1/22/2007 Mn-54 4.OOE-01 1.50E+00 5.40E+00 WS L11962-02 1/22/2007 Nb-95 -7.OOE-01 2.OOE+00 7.20E+00 WS Ll 1962-02 1/22/2007 Ru- 103 -1.90E+00 1.90E+00 7.OOE+00 WS Li 1962-02 1/22/2007 Ru- 106 7.OOE+00 1.50E+01 5.20E+01 WS Li 1962-02 1/22/2007 Sb-124 -3.OOE+00 3.80E+00 1.50E+01 WS LI 1962-02 1/22/2007 Sb-125 -1.60E+00 4.40E+00 1.60E+01 WS Li 1962-02 1/22/2007 Se-75 -3.OOE+00 2.OOE+00 7.40E+00 WS Li 1962-02 1/22/2007 Zn-65 -7.OOE+00 4.1OE+00 1.60E+01 WS Li 1962-02 1/22/2007 Zr-95 -2.50E+00 3.1OE+00 1.20E+01 WS L12093-02 2/21/2007 AcTh-228 -1.10E+00 4.90E+00 1.70E+01 WS L12093-02 2/21/2007 Ag- 108m 5.70E-01 8.40E-01 2.80E+00 WS L12093-02 2/21/2007 Ag-ll0m 1.20E+00 1.40E+00 4.60E+00 WS L12093-02 2/21/2007 Ba-140 1.00E+00 2.20E+00 7.50E+00 WS L12093-02 2/21/2007 Be-7 1.30E+00 8.70E+00 3.OOE+01 WS L12093-02 2/21/2007 Ce-141 -2. 1OE+00 2.20E+00 7.60E+00 WS L12093-02 2/21/2007 Ce-144 9.20E+00 4.90E+00 1.60E+01 WS L12093-02 2/21/2007 Co-57 5.40E-0 1 6.30E-01 2.1OE+00 WS L12093-02 2/21/2007 Co-58 -6.OOE-01 1.1OE+00 3.70E+00 WS L12093-02 2/21/2007 Co-60 1.20E+00 1.30E+00 4.50E+00 WS L12093m02 2/21/2007 Cr-51 1.33E+01 8.30E+00 2.70E+01 WS L12093-02 2/21/2007 Cs-134 1.OOE-01 1.1OE+00 3.90E+00 WS L12093-02 2/21/2007 Cs-137 -3.70E-01 9.70E-01 3.40E+00 WS L12093-02 2/21/2007 Fe-59 -4.OOE-01 2.30E+00 8.20E+00 WS L12093-02 2/21/2007 1-131 7.OOE-01 2.20E+00 7.40E+00 WS L12093-02 2/21/2007 K-40 3.12E+02 2.50E+01 6.1OE+0I WS L12093-02 2/21/2007 La-140 1.20E+00 2.50E+00 8.60E+00 WS L12093-02 2/21/2007 Mn-54 2.OOE-01 1.1OE+00 3.70E+00 WS L12093-02 2/21/2007 Nb-95 9.OOE-01 1.30E+00 4.40E+00 WS L12093-02 2/21/2007 Ru- 103 -1.00E+00 1.1OE+00 3.80E+00 WS L12093-02 2/21/2007 Ru-106 -8.90E+00 8.70E+00 3.1 OE+0 I WS L12093-02 2/21/2007 Sb-124 6.OOE-01 2.80E+00 9.90E+00 WS L12093-02 2/21/2007 Sb-125 -1.90E+00 2.40E+00 8.50E+00 WS L12093-02 2/21/2007 Se-75 1.40E+00 1.00E+00 3.40E+00 WS L12093-02 2/21/2007 Zn-65 -5.80E+00 2.30E+00 8.70E+00 WS L12093-02 2/21/2007 Zr-95 3.OOE-01 2. 1OE+00 7.10E+00 WS L12178-02 3/21/2007 AcTh-228 -3.OOE-01 5.50E+00 2.OOE+01 WS L12178-02 3/21/2007 Ag-108m -1.OOE-01 1.30E+00 4.60E+00 WS L12178-02 3/21/2007 Ag-il0mn 7.OOE-01 2.10E+00 7.30E+00 WS L12178-02 3/21/2007 Ba-140 -3.60E+00 2.80E+00 1.10E+01 WS L12178-02 3/21/2007 Be-7 1.30E+01 1.40E+01 4.60E+01 WS L12178-02 3/21/2007 Ce-141 -1.90E+00 2.40E+00 8.40E+00 WS L12178-02 3/21/2007 Ce-144 4.70E+00 8.OOE+00 2.70E+01 WS L12178-02 3/21/2007 Co-57 2.OOE-01 1.00E+00 3.40E+00 WS L12178-02 3/21/2007 Co-58 -2.OOE-01 1.60E+00 5.70E+00 WS L12178-02 3/21/2007 Co-60 -7.OOE-01 1.40E+00 5.30E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-211-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/L) (pCi/kg) (pCi/kg)

WS L12178-02 3/21/2007 Cr-51 -1.40E+01 1.50E+01 5.40E+01 WS L12178-02 3/21/2007 Cs-134 2.OOE+00 1.60E+00 5.20E+00 WS L12178-02 3/21/2007 Cs-137 5.OOE-01 1.60E+00 5.70E+00 WS L12178-02 3/21/2007 Fe-59 2.OOE-01 2.90E+00 1.1 OE+0 1 WS L12178-02 3/21/2007 1-131 -3.20E+00 3.80E+00 1.40E+01 WS L12178-02 3/21/2007 K-40 3.1OE+02 3.30E+01 7.1OE+01 WS L12178-02 3/21/2007 La-140 -4.20E+00 3.20E+00 1.30E+01 WS L12178-02 3/21/2007 Mn-54 -3.50E+00 1.50E+00 5.90E+00 WS L12178-02 3/21/2007 Nb-95 -6.OOE-0 1 1.70E+00 6.1OE+00 WS L12178-02 3/21/2007 Ru-103 -2.OOE-01 1.40E+00 5. 10E+00 WS L12178-02 3/21/2007 Ru-106 -8.OOE+00 1.30E+01 4.80E+01 WS L12178-02 3/21/2007 Sb-124 -5.50E+00 3.60E+00 1.50E+01 WS L12178-02 3/21/2007 Sb-125 8.OOE-01 4.1OE+00 1.40E+01 WS L12178-02 3/21/2007 Se-75 8.OOE-01 1.70E+00 5.90E+00 WS L12178-02 3/21/2007 Zn-65 -8.60E+00 3.20E+00 1.30E+01 WS L12178-02 3/21/2007 Zr-95 -3.60E+00 2.70E+00 1.00E+01 WS L12282-02 3/21/2007 H-3 -1.01E+03 4.70E+02 1.60E+03 WS L12367-02 4/24/2007 AcTh-228 -6. 1OE+00 3.50E+00 1.40E+01 WS L12367-02 4/24/2007 Ag-108m 9.OOE-02 8.50E-01 3.OOE+00 WS L12367-02 4/24/2007 Ag-li0m -4.OOE-01 1.20E+00 4.50E+00 WS L12367-02 4/24/2007 Ba-140 3.70E+00 2.50E+00 8.40E+00 WS L12367-02 4/24/2007 Be-7 -3.90E+00 9.40E+00 3.40E+0I WS L12367-02 4/24/2007 Ce-141 2.20E+00 1.90E+00 6.40E+00 WS L12367-02 4/24/2007 Ce- 144 -9.OOE-01 5.40E+00 1.90E+01 WS L12367-02 4/24/2007 Co-57 6.10E-01 6.60E-01 2.20E+00 WS L12367-02 4/24/2007 Co-58 4.OOE-01 1.10E+00 4.OOE+00 WS L12367-02 4/24/2007 Co-60 8.OOE-01 1.20E+00 4.40E+00 WS L12367-02 4/24/2007 Cr-51 4.70E+00 9.40E+00 3.30E+01 WS L12367-02 4/24/2007 Cs-134 2.OOE-01 1.10E+00 4.OOE+00 WS L12367-02 4/24/2007 Cs-137 0.OOE+00 9.50E-01 3.50E+00 WS L12367-02 4/24/2007 Fe-59 3.OOE+00 2.40E+00 8.10E+00 WS L12367-02 4/24/2007 1-131 -4.10E+00 2.80E+00 1.1 OE+0 1 WS L12367-02 4/24/2007 K-40 2.08E+02 2.70E+01 6.30E+01 WS L12367-02 4/24/2007 La-140 4.20E+00 2.90E+00 9.60E+00 WS L12367-02 4/24/2007 Mn-54 8.OOE-01 1.00E+00 3.60E+00 WS L12367-02 4/24/2007 Nb-95 1.00E-01 1.20E+00 4.50E+00 WS L12367-02 4/24/2007 Ru-103 -1.70E+00 1.20E+00 4.50E+00 WS L12367-02 4/24/2007 Ru-106 -1.54E+01 8.30E+00 3.40E+01 WS L12367-02 4/24/2007 Sb-124 -1.70E+00 2.40E+00 1.00E+01 WS L12367-02 4/24/2007 Sb-125 0.OOE+00 2.40E+00 8.70E+00 WS L12367-02 4/24/2007 Se-75 3.OOE-01 1.1 OE+00 4.OOE+00 WS L12367-02 4/24/2007 Zn-65 -1.00E+00 2.40E+00 9.1OE+00 WS L12367-02 4/24/2007 Zr-95 7.OOE-01 2.20E+00 7.80E+00 WS L12462-02 5/22/2007 AcTh-228 -9.70E+00 8.70E+00 3.30E+01 WS L12462-02 5/22/2007 Ag-108m 1.00E-01 1.50E+00 5.30E+00 WS L12462-02 5/22/2007 Ag- 110m -1.40E+00 2.60E+00 9.90E+00 WS L12462-02 5/22/2007 Ba-140 -6.OOE-01 2.80E+00 1.10E+01 WS L12462-02 5/22/2007 Be-7 -1.60E+01 1.50E+01 5.60E+01 WS L12462-02 5/22/2007 Ce-141 -1.90E+00 2.60E+00 9.OOE+00 WS L12462-02 5/22/2007 Ce-144 8.OOE+00 8.30E+00 2.80E+01 WS L12462-02 5/22/2007 Co-57 -7.OOE-01 1.1OE+00 3.90E+00 WS L12462-02 5/22/2007 Co-58 -3.90E+00 1.70E+00 7.20E+00 WS L12462-02 5/22/2007 Co-60 9.OOE-01 2.OOE+00 7.40E+00 WS L12462-02 5/22/2007 Cr-51 -1.20E+01 1.50E+01 5.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-212-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12462-02 5/22/2007 Cs-134 1.30E+00 1.70E+00 6.OOE+00 WS L12462-02 5/22/2007 Cs-137 2.OOE+00 1.90E+00 6.40E+00 WS L12462-02 5/22/2007 Fe-59 1.90E+00 3.80E+00 1.40E+01 WS L12462-02 5/22/2007 1-131 3.1OE+00 3.20E+00 1.1OE+01 WS L12462-02 5/22/2007 K-40 2.25E+02 4.1OE+01 1.00E+02 WS L12462-02 5/22/2007 La- 140 -7.OOE-0 1 3.20E+00 1.30E+01 WS L12462-02 5/22/2007 Mn-54 -1.00E+00 1.70E+00 6.40E+00 WS L12462-02 5/22/2007 Nb-95 3.1OE+00 1.80E+00 5.80E+00 WS L12462-02 5/22/2007 Ru- 103 -2.60E+00 1.80E+00 7.OOE+00 WS L12462-02 5/22/2007 Ru-106 2.OOE+00 1.70E+01 6.OOE+01 WS L12462-02 5/22/2007 Sb-124 -6. 1OE+00 4.30E+00 1.90E+01 WS L12462-02 5/22/2007 Sb-125 1.30E+00 4.20E+00 1.50E+01 WS L12462-02 5/22/2007 Se-75 2. 1OE+00 1.90E+00 6.30E+00 WS L12462-02 5/22/2007 Zn-65 3.70E+00 3.80E+00 1.30E+01 WS L12462-02 5/22/2007 Zr-95 -3. 1OE+00 2.80E+00 1.1OE+01 WS L12575-02 6/18/2007 AcTh-228 4.40E+00 7.20E+00 2.50E+01 WS L12575-02 6/18/2007 Ag-108m 1.00E+00 1.20E+00 4.20E+00 WS L12575-02 6/18/2007 Ag-Il0m 1.40E+00 2.20E+00 7.60E+00 WS L12575-02 6/18/2007 Ba-140 2.1OE+00 3.20E+00 1.1 OE+0 1 WS L12575-02 6/18/2007 Be-7 1.30E+01 1.30E+01 4.40E+01 WS L12575-02 6/18/2007 Ce-141 -4.80E+00 2.30E+00 8. 1OE+00 WS L12575-02 6/18/2007 Ce-144 -1.60E+00 7.50E+00 2.60E+01 WS L12575-02 6/18/2007 Co-57 -2.40E-01 9.40E-01 3.20E+00 WS L12575-02 6/18/2007 Co-58 -2.20E+00 1.60E+00 6.20E+00 WS L12575-02 6/18/2007 Co-60 1.30E+00 1.90E+00 6.50E+00 WS L12575-02 6/18/2007 Cr-51 -1.40E+01 1.20E+01 4.30E+01 WS L12575-02 6/18/2007 Cs-134 5.50E+00 1.90E+00 5.80E+00 WS L12575-02 6/18/2007 Cs-137 1.70E+00 1.40E+00 4.70E+00 WS L12575-02 6/18/2007 Fe-59 -3.40E+00 3.50E+00 1.30E+01 WS L12575-02 6/18/2007 1-131 -1.60E+00 2.90E+00 1.00E+01 WS L12575-02 6/18/2007 K-40 2.78E+02 4.OOE+01 1.1OE+02

WS L12575-02 6/18/2007 La-140 2.40E+00 3.70E+00 1.30E+01 WS L12575-02 6/18/2007 Mn-54 -1.50E+00 1.50E+00 5.80E+00 WS L12575-02 6/18/2007 Nb-95 -1.20E+00 1.90E+00 6.90E+00 WS L12575-02 6/18/2007 Ru-103 -5.90E+00 1.70E+00 6.80E+00 WS L12575-02 6/18/2007 Ru-106 8.OOE+00 1.40E+01 4.70E+01 WS L12575-02 6/18/2007 Sb-124 -8.40E+00 3.90E+00 1.70E+01 WS L12575-02 6/18/2007 Sb-125 -6.70E+00 3.90E+00 1.50E+01 WS L12575-02 6/18/2007 Se-75 -1.60E+00 1.60E+00 5.80E+00 WS L12575-02 6/18/2007 Zn-65 2.50E+00 3.70E+00 1.30E+01 WS L12575-02 6/18/2007 Zr-95 -1.20E+00 3.OOE+00 1.1OE+01 WS L12740-02 7/24/2007 AcTh-228 -2.50E+00 5.50E+00 2.OOE+01 WS L12740-02 7/24/2007 Ag-108m 1.90E+00 1.30E+00 4.40E+00 WS L12740-02 7/24/2007 Ag-i10m 1.60E+00 1.90E+00 6.70E+00 WS L12740-02 7/24/2007 Ba-140 -8.OOE-01 2.80E+00 1.1OE+0 I WS L12740-02 7/24/2007 Be-7 1.10E+01 1.30E+01 4.50E+01 WS L12740-02 7/24/2007 Ce-141 3.90E+00 2.40E+00 7.70E+00 WS L12740-02 7/24/2007 Ce- 144 -5.90E+00 8.80E+00 3.1OE+01 WS L12740-02 7/24/2007 Co-57 -6.OOE-01 1.1 OE+00 3.90E+00 WS L12740-02 7/24/2007 Co-58 -1.90E+00 1.30E+00 5.30E+00 WS L12740-02 7/24/2007 Co-60 -1.00E+00 1.40E+00 5.70E+00 WS L12740-02 7/24/2007 Cr-51 -4.OOE+00 1.60E+01 5.60E+01 WS L12740-02 7/24/2007 Cs-134 -1.20E+00 1.60E+00 5.90E+00 WS L12740-02 7/24/2007 Cs-137 4.50E+00 1.70E+00 5.40E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-213-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12740-02 7/24/2007 Fe-59 -2.OOE-01 3.OOE+00 1.1OE+0 I WS L12740-02 7/24/2007 1-131 1.40E+00 3.50E+00 1.20E+01 WS L12740-02 7/24/2007 K-40 2.54E+02 3.40E+01 8.OOE+01 WS L12740-02 7/24/2007 La-140 -9.OOE-01 3.30E+00 1.20E+0I WS L12740-02 7/24/2007 Mn-54 2.OOE-01 1.30E+00 4.90E+00 WS L12740-02 7/24/2007 Nb-95 4.OOE-01 1.70E+00 6.1OE+00 WS L12740-02 7/24/2007 Ru-103 -2.30E+00 1.60E+00 6.OOE+00 WS L12740-02 7/24/2007 Ru-106 7.OOE+00 1.40E+01 4.90E+01 WS L12740-02 7/24/2007 Sb-124 -4.50E+00 3.70E+00 1.50E+0I WS L12740-02 7/24/2007 Sb-125 6.40E+00 4.20E+00 1.40E+01 WS L12740-02 7/24/2007 Se-75 9.OOE-01 1.70E+00 5.90E+00 WS L12740-02 7/24/2007 Zn-65 1.20E+00 3.70E+00 1.30E+01 WS L12740-02 7/24/2007 Zr-95 2.OOE+00 2.80E+00 9.80E+00 WS L12792-02 6/18/2007 H-3 4.40E+02 4.50E+02 1.30E+03 WS L12888-02 8/21/2007 AcTh-228 -2.50E+00 7.60E+00 2.80E+0 1 WS L12888-02 8/21/2007 Ag- 108m 1.30E+00 1.50E+00 5.1OE+00 WS L12888-02 8/21/2007 Ag-110m -3.10E+00 2.20E+00 9.OOE+00 WS L12888-02 8/21/2007 Ba-140 -6.OOE-01 2.40E+00 9.60E+00 WS L12888-02 8/21/2007 Be-7 2.10E+01 1.60E+01 5.40E+01 WS L12888-02 8/21/2007 Ce-141 4.20E+00 3.OOE+00 1.00E+01 WS L12888-02 8/21/2007 Ce-144 -1.30E+01 1.1OE+01 4.OOE+01 WS L12888-02 8/21/2007 Co-57 -2.50E+00 1.20E+00 4.50E+00 WS L12888-02 8/21/2007 Co-58 -4.OOE+00 2.OOE+00 8.OOE+00 WS L12888-02 8/21/2007 Co-60 2.OOE-01 1.70E+00 6.30E+00 WS L12888-02 8/21/2007 Cr-51 -2.40E+01 1.70E+01 6.50E+01 WS L12888-02 8/21/2007 Cs-134 3.OOE-01 2.OOE+00 7.20E+00 WS L12888-02 8/21/2007 Cs-137 8.OOE-01 1.80E+00 6.40E+00 WS L12888-02 8/21/2007 Fe-59 -7.50E+00 3.90E+00 1.60E+01 WS L12888-02 8/21/2007 1-131 -4.50E+00 4.OOE+00 1.50E+01 WS L12888-02 8/21/2007 K-40 3.07E+02 4.40E+01 1.1OE+02 WS L12888-02 8/21/2007 La-140 -6.OOE-01 2.80E+00 1.1OE+0 1 WS L12888-02 8/21/2007 Mn-54 -2.80E+00 2.OOE+00 7.70E+00 WS L12888-02 8/21/2007 Nb-95 2.60E+00 2.20E+00 7.40E+00 WS L12888-02 8/21/2007 Ru-103 0.OOE+00 2.OOE+00 7.20E+00 WS L12888-02 8/21/2007 Ru- 106 -3.OOE+00 1.70E+01 6.30E+OI WS L12888-02 8/21/2007 Sb-124 -9.OOE-01 3.40E+00 1.40E+01 WS L12888-02 8/21/2007 Sb-125 -1.00E+00 4.1OE+00 1.50E+01 WS L12888-02 8/21/2007 Se-75 -2.OOE-01 2.1OE+00 7.50E+00 WS L12888-02 8/21/2007 Zn-65 6.20E+00 6.60E+00 2.20E+01 WS L12888-02 8/21/2007 Zr-95 -4.70E+00 3.30E+00 1.30E+01 WS L12977-02 9/17/2007 AcTh-228 -4.70E+00 7.OOE+00 2.60E+01 WS L12977-02 9/17/2007 Ag-108m 4.OOE-01 1.40E+00 4.80E+00 WS L12977-02 9/17/2007 Ag-lr0m -3.OOE-01 2.OOE+00 7.50E+00 WS L12977-02 9/17/2007 Ba-140 -9.OOE-01 2.30E+00 9.20E+00 WS L12977-02 9/17/2007 Be-7 8.OOE+00 1.30E+01 4.50E+01 WS L12977-02 9/17/2007 Ce-141 -9.80E+00 2.60E+00 9.90E+00 WS L12977-02 9/17/2007 Ce-144 -1.56E+01 8.70E+00 3.20E+01 WS L12977-02 9/17/2007 Co-57 1.90E+00 1.20E+00 3.90E+00 WS L12977-02 9/17/2007 Co-58 -4.40E+00 1.70E+00 7.1OE+00 WS L12977-02 9/17/2007 Co-60 -3.OOE-01 1.90E+00 7.OOE+00 WS L12977-02 9/17/2007 Cr-51 6.OOE+00 1.50E+01 5.1 OE+0 I WS L12977-02 9/17/2007 Cs-134 3.10E+00 1.80E+00 5.90E+00 WS L12977-02 9/17/2007 Cs-137 -6.OOE-01 1.60E+00 5.90E+00 WS L12977-02 9/17/2007 Fe-59 -3.70E+00 3.80E+00 1.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-214-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L12977-02 9/17/2007 1-131 2.60E+00 3.10E+00 1.00E+01 WS L12977-02 9/17/2007 K-40 2.87E+02 3.70E+0I 8.50E+01 WS L12977-02 9/17/2007 La-140 -1.10E+00 2.70E+00 1.10E+01 WS L12977-02 9/17/2007 Mn-54 6.OOE-01 1.70E+00 6.20E+00 WS L12977-02 9/17/2007 Nb-95 -1.90E+00 2.10E+00 7.70E+00 WS L12977-02 9/17/2007 Ru-103 -3.OOE-01 2.OOE+00 7.10E+00 wS L12977-02 9/17/2007 Ru-106 6.OOE+00 1.60E+01 5.60E+01 WS L12977-02 9/17/2007 Sb-124 0.OOE+00 3.80E+00 1.50E+01 WS L12977-02 9/17/2007 Sb-125 2.OOE+00 4.1OE+00 1.40E+01 WS L12977-02 9/17/2007 Se-75 4.OOE-01 2.OOE+00 7.OOE+00 WS L12977-02 9/17/2007 Zn-65 -8.40E+00 3.90E+00 1.60E+01 WS L12977-02 9/17/2007 Zr-95 -4.30E+00 3.OOE+00 1.20E+01 WS L13151-02 9/17/2007 H-3 -4.OOE+02 4.60E+02 1.40E+03 WS L13159-02 10/22/2007 AcTh-228 2.90E+00 8.OOE+00 2.80E+01 WS L13159-02 10/22/2007 Ag- 108m 3.70E+00 1.60E+00 5.1OE+00 WS L13159-02 10/22/2007 Ag-110m -6.OOE-01 2.40E+00 8.90E+00 WS L13159-02 10/22/2007 Ba-140 5.90E+00 3.10E+00 9.80E+00 WS L13159-02 10/22/2007 Be-7 -5.OOE+00 1.60E+01 5.60E+01 WS L13159-02 10/22/2007 Ce-141 -7.00E-01 2.90E+00 1.00E+01 WS L13159-02 10/22/2007 Ce-144 -7.OOE+00 1.00E+01 3.70E+01 WS L13159-02 10/22/2007 Co-57 6.OOE-01 1.40E+00 4.60E+00 WS L13159-02 10/22/2007 Co-58 -1.90E+00 1.80E+00 7.OOE+00 WS L13159-02 10/22/2007 Co-60 6.OOE-01 2.10E+00 7.70E+00 WS L13159-02 10/22/2007 Cr-51 3.1OE+0I 1.70E+01 5.60E+01 WS L13159-02 10/22/2007 Cs-134 2.OOE-01 2.OOE+00 7.1OE+00 WS L13159-02 10/22/2007 Cs-137 -1.30E+00 2.OOE+00 7.30E+00 WS L13159-02 10/22/2007 Fe-59 -1.50E+00 3.90E+00 1.50E+01 WS L13159-02 10/22/2007 1-131 -5.OOE-01 3.60E+00 1.30E+01 WS L13159-02 10/22/2007 K-40 2.20E+02 4.OOE+01 1.1 OE+02 WS L13159-02 10/22/2007 La-140 5.90E+00 3.10E+00 9.80E+00 WS L13159-02 10/22/2007 Mn-54 -1.60E+00 1.70E+00 6.60E+00 WS L13159-02 10/22/2007 Nb-95 5.OOE-01 2.30E+00 8.30E+00 WS L13159-02 10/22/2007 Ru-103 -9.OOE-01 1.80E+00 6.60E+00 WS L13159-02 10/22/2007 Ru-106 -4.OOE+00 1.70E+01 6.20E+01 WS L13159-02 10/22/2007 Sb-124 8.OOE-01 4.1OE+00 1.60E+01 WS L13159-02 10/22/2007 Sb-125 -1.15E+01 4.60E+00 1.80E+01 WS L13159-02 10/22/2007 Se-75 2.OOE-01 2. 1OE+00 7.20E+00 WS L13159-02 10/22/2007 Zn-65 -4.OOE+00 8.OOE+00 2.80E+01 WS L13159-02 10/22/2007 Zr-95 0.OOE+00 3.30E+00 1.20E+01 WS L13300-02 11/26/2007 AcTh-228 1.18E+0I 7.60E+00 2.50E+01 WS L13300-02 11/26/2007 Ag-108m -1.50E+00 1.40E+00 5.1OE+00 WS L13300-02 11/26/2007 Ag-110m -2.30E+00 2.20E+00 8.60E+00 WS L13300-02 11/26/2007 Ba-140 -6.OOE+00 3.10E+00 1.30E+01 WS L13300-02 11/26/2007 Be-7 -6.OOE+00 1.30E+01 4.80E+01 WS L13300-02 11/26/2007 Ce-141 -3.30E+00 2.50E+00 8.90E+00 WS L13300-02 11/26/2007 Ce-144 8.OOE-01 9.40E+00 3.20E+01 WS L13300-02 11/26/2007 Co-57 -3.OOE-01 1.20E+00 4.20E+00 WS L13300-02 11/26/2007 Co-58 -2.90E+00 1.90E+00 7.30E+00 WS L13300-02 11/26/2007 Co-60 -2.80E+00 2. 1OE+00 8.30E+00 WS L13300-02 11/26/2007 Cr-51 -2.20E+01 1.60E+01 5.90E+01 WS L13300-02 11/26/2007 Cs-134 1.1 OE+00 1.60E+00 5.70E+00 WS L13300-02 11/26/2007 Cs-137 1.1OE+00 1.40E+00 5.OOE+00 WS L13300-02 11/26/2007 Fe-59 1.00E-01 3.60E+00 1.30E+01 WS L13300-02 11/26/2007 1-131 2.80E+00 3.20E+00 1.10E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement

-215-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Program - 2007 SAMPLE TYPE END CONC STD.DEV. MDC STATION LSN DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WS L13300-02 11/26/2007 K-40 3.21E+02 3.90E+01 9.1OE+01 WS L13300-02 11/26/2007 La-140 -6.OOE+00 3. 10OE+00 1.30E+01 WS L13300-02 11/26/2007 Mn-54 2.OOE+00 1.50E+00 5.1OE+00 WS L13300-02 11/26/2007 Nb-95 1.40E+00 2.30E+00 7.80E+00 WS L13300-02 11/26/2007 Ru-103 7.OOE-01 2.20E+00 7.40E+00 WS L13300-02 11/26/2007 Ru-106 3.OOE+00 1.60E+01 5.50E+01 WS L13300-02 11/26/2007 Sb-124 1.50E+00 3.70E+00 1.40E+01 WS L13300-02 11/26/2007 Sb-125 -2.OOE+00 4.1OE+00 1.50E+01 WS L13300-02 11/26/2007 Se-75 -1.00E+00 2.1OE+00 7.30E+00 WS L13300-02 11/26/2007 Zn-65 -8.20E+00 4.20E+00 1.70E+01 WS L13300-02 11/26/2007 Zr-95 4.OOE+00 2.90E+00 9.50E+00 WS L13425-02 12/19/2007 AcTh-228 1.10E+00 4.30E+00 1.40E+01 WS L13425-02 12/19/2007 Ag-108m 4.50E-0 I 5.50E-01 1.80E+00 WS L13425-02 12/19/2007 Ag-110m -8.80E-01 8.70E-01 3.OOE+00 WS L13425-02 12/19/2007 Ba-140 1.60E+00 2.40E+00 8.10OE+00 WS L13425-02 12/19/2007 Be-7 -1.34E+01 6.OOE+00 2.1OE+01 WS L13425-02 12/19/2007 Ce-141 -3.OOE-01 1.70E+00 5.60E+00 WS L13425-02 12/19/2007 Ce-144 -1.10E+00 3.60E+00 1.20E+01 WS L13425-02 12/19/2007 Co-57 2.OOE-02 4.70E-01 1.60E+00 WS L13425-02 12/19/2007 Co-58 9.20E-01 7.1OE-01 2.40E+00 WS L13425-02 12/19/2007 Co-60 -1.09E+00 6.40E-01 2.40E+00 WS L13425-02 12/19/2007 Cr-51 -1.18E+01 8.10E+00 2.80E+0 1 WS L13425-02 12/19/2007 Cs-134 -8.70E-01 7.20E-01 2.50E+00 WS L13425-02 12/19/2007 Cs-137 4.60E-01 6.10E-01 2.OOE+00 WS L13425-02 12/19/2007 Fe-59 1.90E+00 1.80E+00 5.90E+00 WS L13425-02 12/19/2007 1-131 -4.10E+00 3.90E+00 1.30E+01 WS L13425-02 12/19/2007 K-40 3.41E+02 1.80E+01 4.60E+01

WS L13425-02 12/19/2007 La-140 1.60E+00 2.40E+00 8.1OE+00 WS L13425-02 12/19/2007 Mn-54 -8.90E-01 6.70E-01 2.40E+00 WS L13425-02 12/19/2007 Nb-95 -4.OOE-01 1.60E+00 5.40E+00 WS L13425-02 12/19/2007 Ru-103 -7.50E-01 9.10E-01 3.10E+00 WS L13425-02 12/19/2007 Ru-106 1.50E+00 6.40E+00 2.20E+01 WS L13425-02 12/19/2007 Sb-124 1.80E+00 1.70E+00 5.70E+00 WS L13425-02 12/19/2007 Sb-125 2.1OE+00 1.60E+00 5.50E+00 WS L13425-02 12/19/2007 Se-75 1.50E-01 8.50E-01 2.80E+00 WS L13425-02 12/19/2007 Zn-65 -2.OOE+00 1.50E+00 5.30E+00 WS L13425-02 12/19/2007 Zr-95 1.1OE+00 1.30E+00 4.40E+00 WS L13448-02 12/19/2007 H-3 4.OOE+01 4.40E+02 1.30E+03

Radioactivity detected d in sample (i.e., concentration > 3 X standard deviation)

+ Minimum Detectable Concentration > Lower Limit of Detection Requirement,

-216-

'A

SBK-L-08065, Transmittal of 2007 Annual Radiological Environmental Operating Report

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SBK-L-08065, Transmittal of 2007 Annual Radiological Environmental Operating Report

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