Text

Annual Radiological Environmental Operating Report
	ML091350217
Person / Time
Site:	Millstone
Issue date:	04/30/2009
From:	Griffin R; Dominion Nuclear Connecticut
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	09-199, FOIA/PA-2011-0115
	Download: ML091350217 (139)
	v • d • e

QDominion Dominion Nuclear Connecticut, Inc.

Millstone Power Station Rope Ferry Road Waterford, CT 06385 APR 3 0 2009 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Serial No.

MPS Lic/GJC Docket Nos.

License Nos.09-199 RO 50-245 50-336 50-423 DPR-21 DPR-65 NPF-49 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNITS 1. 2, AND 3 2008 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT This letter transmits the Annual Radiological Environmental Operating Report for the Millstone Power Station, for the period January 2008 through December 2008. This satisfies the provisions of Section 5.7.2 of Millstone Power Station Unit 1 Permanently Defueled Technical Specifications (PDTS), and Sections 6.9.1.6a and 6.9.1.3 of the Millstone Power Station Units 2 and 3 Technical Specifications, respectively.

If you have any questions or require additional information, please contact Mr. William D. Bartron at (860) 444 4301.

Sincerely, S

S t

ce Station Safety and Licensing

~j~~bO(

Serial No.09-199 2008 Annual Radiological Environmental Operating Report Page 2 of 3 Attachments:

1 Commitments made in this letter: None.

cc:

U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406-1415 Mr. J. B. Hickman NRC Project Manager Millstone Unit 1 U.S. Nuclear Regulatory Commission Mail Stop T-7E18 Washington, DC 20555 Ms. L. A. Kauffman NRC Inspector U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406-1415 Ms. C. J. Sanders NRC Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 8B3 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station

Serial No.09-199 2008 Annual Radiological Environmental Operating Report Page 3 of 3 (2copies)

Director Bureau of Air Management Monitoring & Radiation Division Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127

Serial No.09-199 Docket Nos. 50-245 50-336 50-423 License Nos. DPR-21 DPR-65 NPF-49 ATTACHMENT 1 2008 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MILLSTONE POWER STATION UNITS 1, 2, AND 3 DOMINION. NUCLEAR CONNECTICUT, INC. (DNC)

Millstone Power Station 2008 Radiological Environmental Operating Report January 1, 2008 - December 31, 2008 C tuiw IL Dominion Nuclear Connecticut, Inc.

Unit 1

2 3

License DPR-21 DPR-65 NPF-49 Docket 50-245 50-336 50-423 Dominion

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MILLSTONE POWER STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2008 MILLSTONE UNIT 1, DOCKET NO. 50-245 MILLSTONE UNIT 2, DOCKET NO. 50-336 MILLSTONE UNIT 3, DOCKET NO. 50-423 By the Dominion Nuclear Connecticut, Inc.

Waterford, Connecticut

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 TABLE OF CONTENTS EX E C U T IV E S U M M A R Y..................................................................................................

i

1. IN T R O D U C T IO N.......................................................................................

1-1 1.1 O v e rv ie w..................................................

................................... 1-1 1.2 R adiation and R adioactivity.............................................................

1-1 1.3 Sources of Radiation.......................................

1-2 1.4 N uclear Reactor O perations............................................................

1-3 1.5 R adioactive Effluent C ontrol............................................................

1-8 1.6 Radiological Im pact on Hum ans....................................................

1-11

2.

PRO G RA M DESC R IPTIO N.........................................................................

2-1 2.1 Sam pling Schedule and Locations...................................................

2-1 2.2 Samples Collected During Report Period........................................

2-7

3.

RADIO CHEM ICAL RESULTS.......................................................................

3-1 3.1 S um m a ry T a ble...............................................................................

3-1

.3.2 D a ta T a b le s..................................................................................

3-19

4.

DISCUSSIO N O F RESULTS....................................................

.................. 4-1 4.1 Gamma Exposr6 Ra te"(Table 1.)

4-1 4.,2:.. :,Air Particulate Gross Beta Radioactivity (Table 2)..........................

4-3 4.3 Airborne Iodine (Table! 3).

4-3 4.4 Air Particulate Gam ma (Table 4A-D)..............................................

4-5 4.5 Air Particulate Strontium (Table 5)............. :.....................................

4-5 4.6 S oil, (Table 6)

. 4-5 4.7 C ow M ilk

,b........

4.-...............................

5 4.8 G oat M ilk. (Table 8)-!'................................................................

4-5 4.9 Pasture Grass and Feed,(Table 9) 4-6 4.10 W ell W ater (Table 10).

4-7 4.11 Reservoir W ater" (Table 11)..................

4-7 4.12 Fruits and Vegetables (Tabie 12).......

4-7 4.13 Broad Leaf Vegetation' (Table,13)........

-7 4.14 Seawater. (T~ble :14)....., :*i......,,.....

.... 4-8 4.15 Bottom Sed iment (Table 15).

............ 4-10

..... (.

.. )..................................

4.16 AquaticF lora (Table 16)...................................

4-11 4.17 Fish (Tables 17A and 17B)..............................

4-11 4.17.1 Flounder (Table 17A)......................

............ 4-11 4.17.2 Fish - Other (Table 17B)

......................... 4-11 4.18 Mussels (Table 18)........

4-12 4.19 O ysters (Table 19)..........................

4-12 4.20 Clams (Table 20)........................

............. 4-13 4.21 Scallops (Table,21)....................................

4-13 4.22 -Lobsters (Table 22).....................................

4-13

5.

OFFSITE DOSE EQUIVALENT COMMITMENTS........................................... 5-1 6.

D IS C U S S IO N......................................

................................................ 6-1

7.

REFERENCES...............................................7-1 APPENDIX A - LAND USE CENSUS FOR 2008.....................................................

A-1 APPENDIX B - DNC QA PROGRA M.........................................................................

B-1 APPENDIX C -

SUMMARY

OF INTERLABORATORY COMPARISONS................. C-1

Dominion Nuclear Connecticut, Inc.

Report Millstone Station Annual Radiological Environmental Operating 2008 4-4 4

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 EXECUTIVE

SUMMARY

INTRODUCTION This report summarizes the results of the Radiological Environmental Monitoring Program (REMP) conducted in the vicinity of Millstone Power Station (MPS) during the period from January 1 to December 31, 2008. This document has been prepared in accordance with the requirements of Millstone Unit 2 and 3 Technical Specifications.

The REMP has been established to monitor the radiation and radioactivity released to the environment as a result of Millstone Station's operation. This program, initiated in April 1967, includes the collection, analysis, and evaluation of radiological data in order to assess the impact of Millstone Station on the environment and on the general public.

SAMPLING AND ANALYSIS The environmental sampling media collected in the vicinity of MPS and at distant locations included air particulate filters, charcoal cartridges, soil, goat milk, pasture grass, hay, well water, broadleaf vegetation, fruits, vegetables, seawater, bottom sediment, aquatic flora, fish, mussels, oysters, clams and lobster.

During 2008, there were 1086 samples collected from the atmospheric, aquatic, and terrestrial environments. In addition, 176 exposure measurements were obtained using environmental thermoluminescent dosimeters (TLDs).

A small number of inadvertent issues were encountered in 2008 in the collection of environmental samples in accordance with the Millstone Radiological Effluent Monitoring and Offsite Dose Calculation Manual (REMODCM).

Equipment failures and electrical outages resulted in a small number of instances in which lower than normal sampling volumes were collected at the airborne monitoring stations.

However, in all cases sufficient volume was obtained to perform all the appropriate analyses. Therefore, all 416 air particulate and charcoal cartridges were collected and analyzed as required. A full description of all discrepancies encountered with the environmental monitoring program is presented in the Notes for the Data Tables of this report.

There were 1480 analyses performed on the environmental media samples.

The AREVA-NP -Environmental Laboratory of Westboro, MA, performed these analyses.

Samples were analyzed as required by the Millstone REMODCM.

LAND USE CENSUS The annual land use census in the vicinity of Millstone Station was conducted as required by the Millstone REMODCM between July 15 and December 31, 2008.

Although broadleaf sampling may be used in lieu of a garden census, gardens were included in the 2008 census. Only vegetable gardens having an area of more than 500 square feet need to be identified. Due to the difficulty of measuring individual gardens, the nearest garden within each directional sector identified by a drive-by survey is listed in Appendix A. No new dairy animals within 10 miles of the Station were located during the census. Monthly broad leaf sampling was also performed; it may be used in lieu of the garden census.

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL IMPACT TO THE ENVIRONMENT Most samples collected as part of the Millstone REMP continued to contain detectable amounts of naturally-occurring and man-made radioactive materials.

Offsite ambient radiation measurements using environmental TLDs beyond the site boundary ranged between 55 and 90 milliRoentgens per year. The' range of ambient radiation levels observed with the TLDs is consistent with natural background radiation levels for Connecticut. The only positive activity.associated with station operation found in any.of the terrestrial. samples was Tritium in one of the onsite well samples. The location of this, well is inside the Unit 3 Radiation Control Area; no plant related activity was detected in any of the othersamples.

Monitoring of the aquatic environment in the area of the discharge indicated the presence of the following station related radionuclides: Silver-1 1Om, and Tritium. These station related nuclides were only found onsite inside the mixing zone of the quarry discharge. No plant related activity was detected in any offsite samples. The predominant radioactivity for all samples was from non-plant related sources, such as fallout from nuclear weapons tests and naturally occurring radionuclides.

RADIOLOGICAL IMPACT TO THE GENERAL PUBLIC-During 2008, radiation doses to the general public as a result of Millstone Station's operation continued to be well below the federal limits 'and much less than the dose due to other sources of man-made (e.g., X-rays, medical).and naturally-occurring (e.g.,

cosmic, radon) radiation.

The calculated total body dose to the maximally exposed member of the general -public from radioactive effluents and ambient radiation resulting from MPS operations for 2008 was approximately 0.2 mrem for the year. This conservative estimate is well below the Environmental Protection Agency's (EPA) annual dose limit to any member of the general public and is a fraction of a percent of the typical dose received from natural and other sources of man-made radiation.

CONCLUSIONS The 2008 Radiological Environmental Monitoring Program for Millstone Station resulted in the collection and analysis of.. over,a thousand environmental samples and measurements. The data obtained were used to determine the impact. of Millstone Station's operation on the environment and on the general public.

An evaluation of direct radiation measurements, environmental sample analyses, and dose calculations indicates all applicable federal criteria were met.

Furthermore, radiation levels and resulting doses from station operation were a small fraction of those attributed to natural and man-made background radiation.

Based on this information, there is no significant radiological impact on the environment or on the general public due to Millstone Station's operation.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

1.

INTRODUCTION This section provides an overview of the Millstone Power Station Radiological Environmental Monitoring Program. It also includes background information to allow a reader to have an informed understanding of radiation and nuclear power operation.

1.1 Overview The Radiological Environmental Monitoring Program for 2008 performed by Dominion Nuclear Connecticut for -Millstone Nuclear Power Station (MPS) is discussed in this report. Since the operation of a nuclear power.plant results in the release of small amounts of radioactivity and low levels of radiation, the Nuclear Regulatory Commission (NRC) requires a program to be established to monitor radiation and radioactivity in the environment (Reference 1).

This report, published annually per Millstone Station's Technical Specifications (section 6.9.1.6 for Unit 2 and Section 6.9.1.3 for Unit 3),

summarizes the results of measurements -of radiation and radioactivity in the environment in the vicinity of the Millstone Station and at distant locations during the period January 1 to December 31, 2008.

The Radiological Environmental Monitoring Program consists of taking radiation measurements and collecting samples from the environment, analyzing them for radioactivity content, and interpreting the results. With emphasis on the critical radiation exposure pathways to humans, samples from the aquatic, atmospheric, and terrestrial environments are collected. These samples include, but are not limited to: air, soil, goat milk, pasture grass, hay, well water, broadleaf vegetation, fruits, vegetables, seawater, bottom

sediment, aquatic 1ý flora,

fish, mussels,

oysters, clams and lobster.

Thermoluminescent. dosimeters (TLDs) are placed in the environment to measure gamma radiation levels. The TLDs are processed and the environmental samples are analyzed to measure the very low levels of radiation and radioactivity present in the environment as a result of MPS operation and other natural and man-made sources.

These results are reviewed by MPS's radiological staff and have been reported semiannually or annually to the Nuclear Regulatory Commission and others for over 30 years.

In order to more fully understand how a nuclear power plant impacts humans and the environment, background information on radiation and radioactivity, natural and man-made sources of radiation, reactor operations, radioactive effluent controls, and radiological impact on humans is provided. It is believed that this information will assist the reader in understanding the radiological impact on the environment and humans from the operation of Millstone Station.

1.2 Radiation and Radioactivity All matter is made of atoms. An atom is the smallest part into which matter can be broken down and still maintain all its chemical properties. Nuclear radiation is energy, in the form of waves or particles that is given off from atoms in an excited state (e.g.,

unstable, radioactive atoms).

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Radioactive material exists naturally and has always been a part of our environment.

The earth's crust, for example, contains radioactive uranium, radium, thorium, and potassium.

Some radioactivity is a result of nuclear weapons testing.

Examples of radioactive fallout that is normally present in environmental samples are cesium-137 and strontium-90. Some examples of radioactive materials released from a nuclear power plant are cesium-1 37, iodine-131, strontium-90, and cobalt-60.

Radiation is measured in units of millirem, much like temperature is measured in degrees. A millirem (mrem) is a measure of the. biological effect of the energy deposited in tissue.

The natural and man-made.radiation dose received in one year by the average American is 300 to 400 mrem (References 2, 3, 4, and 5).-

Radioactivity is measured in Curies.

Levels of radioactivity commonly seen in the environment are typically. a small fraction, of a Curie, therefore radioactivity in the environment is typically measured in picocuries. One picocurie (pCi) is equal to 0.037 disintegrations per second (2.22 disintegrations per minute).

1.3 Sources of Radiation As mentioned previously, naturally occurring. radioactivity has always been a part of our.

environment.

Table 1.3 shows the sources and doses of radiation from natural and man-made sources.

Table 1.3 Radiation Sources and Correspondin p Doses.

NATURAL MAN-MADE Radiation Dose Radiation Dose Source I

(millirem/year)

Source (millirem/year)

Cosmic/cosmogenic 28 Medical/Dental X-Rays 39 Internal (in the body) 40 Nuclear Medicine 14 Terrestrial **

16 Consumer Products 10 Radon/Thoron 200 Weapons Fallout 1

Nuclear Power Plants 1

Approximate Total 284 Approximate Total 60

information from References 3 and 4

- Atlantic and Gulf Costal Plain Cosmic radiation from the sun and outer space penetrates the earth's atmosphere and continuously bombards us with rays and charged particles.

Some of this cosmic radiation interacts with gases and particles in the atmosphere, making them radioactive.

These radioactive byproducts from cosmic ray bombardment are referred to as cosmogenic radionuclides. Isotopes such as beryllium-7 and carbon-14 are formed -in this way. Exposure to cosmic and cosmogenic sources of radioactivity results in about 30 mrem of radiation dose per year.

1-2

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Additionally, natural radioactivity is in our body and in the food we eat (about 40 millirem/year), the ground we walk on (about 16 millirem/yr) and the air we breathe (about 200 millirem/year). The majority of a person's annual dose results from exposure to radon and thoron in the air we breathe. These gases and their radioactive decay products arise from the decay of naturally occurring uranium, thorium and radium in the soil and building products such as brick, stone, and concrete. Radon and thoron levels vary greatly with location, primarily due to changes in the concentration of uranium and thorium in the soil. Residents at some locations in Colorado, New York, Pennsylvania, New Jersey and even Connecticut have a higher annual dose as a result of higher levels of radon/thoron gases in these areas.

In total, these various sources of naturally-occurring radiation and radioactivity contribute to a total dose of about 300 mrem per year.

In addition to natural radiation, we are normally exposed to radiation from a number of man-made sources.

The single largest doses from man-made sources result from therapeutic and diagnostic applications of x-rays and radiopharmaceuticals. The annual dose to an individual in the U.S. from medical and dental exposure is about 50 millirem.

Consumer products, such as televisions and smoke detectors, contribute about 10 millirem/year.

Much smaller doses result from weapons fallout (less than 1

millirem/year) and nuclear power plants (less than 1 mrem/year). Typically, the average person in the United States receives about 60 millirem per year from man-made sources.

1.4 Nuclear Reactor Operations Millstone Station generates about 2000 megawatts of electricity at full power, which provides approximately one-half of the power consumed in the State of Connecticut.

Unit 2 and Unit 3 are pressurized water reactors (Unit 1, which is permanently shutdown, was a boiling water reactor). The nuclear station is located on an approximate 500-acre site about 5 kilometers (three miles) west of New London, CT. Commercial operation of Unit 2 began in December 1975 and Unit 3 in May 1986.

Millstone Station was operational during most of 2008, with the exception of a refueling outage at each unit and two mini-outages at Unit 2.

Unit 2 refueling outage was performed between April 6 and May 11; Unit 3 refueling outage was performed between October 11 and November 23. The resulting monthly capacity factors are presented in Table 1.4.

Nuclear-generated electricity is produced by many of the same techniques used for conventional oil and coal-generated electricity. Both systems use heat to boil water in order to produce steam. The steam turns a turbine, which turns a generator, producing electricity. In both cases, the steam passes through a condenser where it changes back into water and recirculates back through the system.

The cooling water source for Millstone Station is the Niantic Bay.

The key difference between nuclear power and conventional power is the source of heat used to boil the water. Conventional plants burn fossil fuels in a boiler, while nuclear plants use uranium fission in a nuclear reactor.

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Dominion Nuclear Connecticut, Inc.

Report Millstone Station Annual Radiological Environmental Operating 2008 TABLE 1.4 MPS OPERATING CAPACITY FACTOR DURING 2008 (Based on designed electrical rating)

Month Unit 2 Percent Capacity Unit 3 Percent Capacity January 100.0%

99.9%

February 99.9%

99.8%

March 99.9%

.99.9%

April 16.0%

99.5%

May 27.9%

99.5%

June 91.5%

98.7%

July 96.1%

97.8%

August 99.4%

97.8%

September 99.2%

98.4%

October.

99.0%

34.5%

November 99.5%

17.1%

December 99.0%

107.5%**

Annual Average 85.6%

. [

87.5%

shutdown for refueling during these months

- relative to designed value prior to 7 % power uprate Inside the reactor, a nuclear reaction called fission takes place.

Particles, called neutrons, strike the nucleus of a uranium-235 atom, causing it to split into fragments called radioactive fission products. The splitting of the atoms releases both heat and more neutrons. The newly-released neutrons then collide with and split other uranium atoms, thus making more heat and releasing even more neutrons, and on and on until the uranium fuel is depleted or spent. This process is called a chain reaction. When this chain reaction is self sustaining, the reactor is called "critical."

The operation of a nuclear reactor results in the release of small amounts of radioactivity and low levels of radiation.

The radioactivity originates from two major sources, radioactive fission products and radioactive activation products.

Radioactive fission products, as illustrated in Figure 1.4-1 (Reference 6), originate from the fissioning of the nuclear fuel. These fission products get into the reactor coolant from their release by minute amounts of uranium on the outside surfaces of the fuel cladding, by diffusion through the fuel pellets and cladding and, on occasion, through defects or failures in the fuel cladding. These fission products circulate along with the reactor coolant water and will deposit on the internal surfaces of pipes and equipment.

The radioactive fission products on the pipes and equipment emit radiation. Examples of some fission products are krypton-85 (Kr-85), strontium-90 (Sr-90), iodine-131 (1-131),

xenon-1 33 (Xe-1 33), and cesium-1 37 (Cs-1 37).

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Dominion Nuclear Connecticut, Inc.

Report Millstone Station Annual Radiological Environmental Operating 2008 Nuclear Fission Fission is the splitting of atoms (e.g, Uranium-235) by a neutron to release heat and more neutrons, creating a chain reaction. Radiation and fission products are by-products of the process.

-,Radiation Uranium

-'Radiation Netr

-A Neutron 0

0 Uranium Uranium Fission Products Figure 1.4-1 Radioactive Fission Product Formation 1-5

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Radioactive activation products (see Figure 1.4-2), on the other hand, originate from two sources. The first is by neutron bombardment of the hydrogen, oxygen and other gas (helium, argon, nitrogen) molecules in the reactor cooling water. The second is a result of the fact that the internals of any piping system or component are subject to minute yet constant corrosion from the reactor cooling water. These minute metallic particles (for example: nickel, iron, cobalt, or magnesium) are transported through the reactor core into the fuel region, where neutrons may react with the nuclei of these particles, producing radioactive products. So, activation products are nothing more than ordinary naturally-occurring atoms that are made unstable or radioactive by neutron bombardment. These activation products circulate along with the reactor coolant water and will deposit on the internal surfaces of pipes and equipment.

The radioactive activation products on the pipes and equipment emit radiation.

Examples of some activation products are manganese-54 (Mn-54), iron-59 (Fe-59), cobalt-60 (Co-60), and zinc-65 (Zn-65).

collision with OC-59 C o-60 Neuto Stable Radioactive Neutron Cobalt Nucleus Cobalt Nucleus Figure 1.4-2 Radioactive Activation Product Formation At Millstone Nuclear Power Station there are five independent protective barriers that confine these radioactive materials. These five barriers, which are shown in Figure 1.4-3 (Reference 6), are:

fuel pellets; fuel cladding; reactor vessel and piping; primary containment and, secondary containment (enclosure building).

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Dominion Nuclear Connecticut, Inc.

Report Millstone Station Annual Radiological Environmental Operating 2008 SIMPLIFIED DIAGRAM OF A PRESSURIZED WATER REACTOR Pressurized water reactor-h*a common type of Light Water Reactor (LWR)

]CONIDENSER IWATER COOING

UNG WASTE HEAT TO THE ENVIRONMENT Figure 1.4-3 The ceramic uranium fuel pellets provide the first barrier. Most of the radioactive fission products are either physically trapped or chemically bound between the uranium atoms, where they will remain.

However, a few fission products that are volatile or gaseous may diffuse through the fuel pellets into small gaps between the pellets and the fuel cladding.

The second barrier, the fuel cladding, consists of zirconium alloy tubes that confine the fuel pellets. The small gaps between the fuel and the cladding contain the noble gases and volatile iodines that are types of radioactive fission products. This radioactivity can diffuse to a small extent through the fuel cladding into the reactor coolant water.

The third barrier consists of the reactor pressure vessel, steel piping and equipment that confine the reactor cooling water. The reactor pressure vessel, which holds the reactor fuel, is typically a steel tank 40 feet high by 14 feet in diameter with walls about five to nine inches thick.

These vessels and associated piping provide containment for radioactivity in the primary coolant and the reactor core. However, during the course of operations and maintenance, small amounts of radioactive fission and activation products can escape through valve leaks or upon breaching of the primary coolant system for maintenance.

The fourth barrier is the primary containment.

It is a cylindrical enclosure with approximately five-foot thick steel reinforced concrete walls lined by steel on the insidd.

Small amounts of radioactivity may be released from primary containment during operation to maintain proper containment pressure and during maintenance and refueling outages.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 The fifth barrier is the secondary containment or enclosure building.

The enclosure building is a steel building that surrounds the primary containment. This barrier is an additional safety feature-at Millstone's reactor units to contain radioactivity that may escape from the primary containment. This enclosure building is equipped with a filtered ventilation system that is used when needed to reduce the radioactivity that escapes from the primary containment.

The five barriers confine most of the radioactive fission and activation products.

However, small 'amounts of radioactivitydo,0 escape via mechanical failures and maintenance on valves, piping, and equipmenit'associated with the reactor cooling water system. The small amounts of radioactive liquids and gases that do escape the various containment systems are further controlled, by the liquid purification, and..ventilation filtration systems. Also," prior to a release t6, the environment, cohtrol systems exist to collect and purify the radioactive effluents in order to reduce releaseýs`tb the environment to as low as is reasonably achievable. The. control of radioactive effluents at Millstone Station will be discussed in more detail in theý next section.

1.5 Radioactive Effluent Control The small amounts of radioactive liquids and gases that might escape the first two barriers are purified in, the liquid and gaseous wastetreatment, systems, then monitored for radioactivity, and released only if the radioactivity levels are below thefed6ral release limits.

Radioactivity released from. the liquid effluent system to the environment is limited, controlled, and monitored by a variety of systems and procedures which include:

reactor water cleanup system; liquid radwaste treatment system; sampling and analysis of the liquid radwaste tanks; and, liquid waste effluent discharge radioactivity monitor.

The purpose of the reactor water cleanup system is to continuously purify the reactor cooling water by removing radioactive atoms and non-radioactive impurities that may become activated by neutron bombardment. A portion of the reactor coolant water is diverted from the primary coolant system and is directed through ion exchange resins where radioactive elements, dissolved and suspended in the water, are removed through chemical processes. The net effect is a substantial reduction of the radioactive material that is present in the primary coolant water and consequently the amount of radioactive material that might escape from the system.

Reactor cooling water that might escape the primary cooling system and other radioactive water sources are collected in floor and equipment drains. These drains direct this radioactive liquid waste to large holdup tanks. The liquid waste collected in the tanks is purified again using the liquid radwaste treatment system, which consists of a filter and ion exchange resins.

Processing of liquid radioactive waste results in large reductions of radioactive liquids discharged into Niantic Bay. Wastes processed through liquid radwaste treatment can be purified and when necessary the processed liquid is re-used in plant systems.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report

'Millstone Station 2008 Prior to release, the radioactivity in the liquid radwaste tank is sampled and analyzed to determine if the level of radioactivity is below the release limits and to quantify the total amount of radioactive liquid effluent that would be released. If the levels are below the federal release limits, the tank is drained to the liquid effluent discharge header.

This liquid waste effluent discharge line is provided with a shielded radioactivityrmonitor.

This detector is connected to a radiation level meter and a recorder in the Control Room.

The radiation alarm is set so that the detector will alarm before radioactivity levels exceed the release limits. The liquid effluent discharge header has an. isolation valve. If an alarm is received, the liquid effluent discharge valve will automatically close, thereby terminating the release to the Niantic Bay and preventing any, liquid radioactivity from being released that may exceed the release limits. An audible alarm notifies the Control Room operator that this has occurred.

Some liquid waste sources, which have a low potential for containing radioactivity, and/or may contain very low levels of contamination, may be discharged directly to the Long Island Sound. One such source of liquid is the turbine building sump. However, periodic representative samples are collected for analysis of radioactivity content to track the amounts of radioactivity being discharged.

Another means for adjusting liquid effluent concentrations to below federal limits is by mixing plant cooling water from the condenser with the liquid effluents in the discharge canal. This larger volume of cooling water further lowers the radioactivity levels.to below the release concentration limits.

The preceding discussion illustrates that many controls exist to reduce the radioactive liquid effluents released to the Niantic Bay to as far below the release limits as is reasonably achievable.

Radioactive releases from the radioactive gaseous effluent system to the environment are limited, controlled, and monitored by a variety of systems and procedures which include:

containment building ventilation system; containment building radioactivity monitors; sampling and analysis of containment building vent and purge effluents; process gas treatment system; auxiliary building (and engineered safeguards and fuel building for Unit 3) ventilation system;

" stack and vent effluent radioactivity monitors; sampling and analysis of stack and vent effluents;

" process radiation monitors; and steam jet air ejector (SJAE) monitor 1-9

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 The primary sources of gaseous radioactive waste are degassing of the primary coolant, gaseous liquid drains, and gaseous vents. Additional sources of gaseous waste activity include ventilation air released from the auxiliary building and purging and venting of the containment building.

The radiation level meter and recorders for the effluent radioactivity monitors are located in the Control Room. The plant process computer aids in tracking themonitor readings. To supplement the information continuously provided by the detector, air samples are taken periodically from the containment, stack and vents.

These -samples are analyzed to quantify the total amount of tritium and radioactive gaseous and particulate effluents released.

Gases from. the primary coolant are held up in waste gas decay tanks for decay atUnit

2. Gaseous waste at Unit 3 is purified througha process gas system, consisting of high-efficiency particulate air filters and charcoal adsorber beds. Gases from periodic venting of the Unit 2 containment are released through a similar process system (Enclosure Building Filtration System) while gases from the Unit 3 containment vacuum pumps are released without treatment. If necessary, Unit 3 containment air can be filtered by an internal particulate and charcoal treatment system. Containment purges (purge is the forced ventilation process while containment vents are pressure releases) for Unit 2 are filtered by high-efficiency particulate filters while at Unit 3 these are not normally filtered.

If necessary, particulate and charcoal filters can be used for these purges.

The auxiliary building ventilation system provides for ventilation of the auxiliary building and enclosure building (and service building and contiguous areas, waste disposal building, and fuel building for Unit 3, for Unit 2 these are all part of the auxiliary building).

Normally, the air from the ventilation of these areas will exhaust through the ventilation vent (which has a particulate filter for Unit 2). If exhaust from these areas reaches a predetermined level, the ventilation flow can be diverted 'by, operator control to a particulate and charcoal filtration system.

Therefore, for both liquid and gaseous releases, radioactive effluent control systems exist to collect and purify the radioactive effluents in order to reduce releases to the environment to as low as is reasonably achievable. The effluents are always monitored, sampled and analyzed to make sure that radioactivity levels are below the release limits.

If the release limits are being approached, isolation valves in some of the waste effluent lines will automatically shut to stop the r'elease, or Control Room operators can implement procedures to ensure that federal regulatory limits are always met.

1-10

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 1.6 Radiological Impact on Humans The final step in the effluent control process is the determination of the radiological dose impact to humans and comparison with the federal dose limits to the public. This step is performed in three stages.

As mentioned previously, the purpose of continuous radiation monitoring and periodic sampling and analysis is to measure the quantities of radioactivity being released to determine compliance with the radioactivity release limits.

This is the first stage for assessing releases to the environment.

The second stage is calculations of the dose. impact to the general public from Millstone Station's radioactive effluents are performbd.

T)Ih purpose of these calculations is to periodically assess the doses to the general public resulting from radioactive effluents to ensure that these doses are being maintained as far below the federal dose limits as is reasonably achievable.

Tlhis is the second., stage for assessing releases to the environment.

The types and quantities of radioactive liquid and gaseous effluents released from Millstone Station during each given year are reported to the Nuclear Regulatory Commission annually in the Radiological Effluent Release Report (RERR).

Similar to this report, the RERR is submitted annually,,,'to the Nuclear Regulatory Commission.

Section 5 of this report discusses the detailed' dose calculations from the RERR and provides a comparison to REMP dose calculations. The liquid and gaseous effluents were well below the federal release limits and were a small percentage of the MPS REMODCM effluent control limits.

The measurements of the physical and chemical nature of the effluents are used to determine how the radionuclides will interact with the environment and how they can result in radiation exposure to humans.

The environmental interaction mechanisms depend upon factors such as the hydrological (water) and meteorological (atmospheric) characteristics in the area. Information on the water flow, wind speed, wind direction, and atmospheric mixing characteristics are used to estimate how radioactivity will distribute and disperse in the ocean and the atmosphere.

The most important.type of information that is used to evaluate the radiological impact on humans is data on the use of the environment.

Information on fish and shellfish consumption, boating usagep, beach usage, locations of cows and goats, locations of residences, locationsof gardens, drinking water supplies, and other usage information are utilized to estimate the amount of radiation and radioactivity received by the general public.

The radiation exposure pathway to humans is the path radioactivity takes from its release point at Millstone Station to its effect on man. The movement of radioactivity through the environment and its transport to humans is portrayed in Figure 1.6.

1-11

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 EXAMPLES OF MILLSTONE STATION'S RADIATION EXPOSURE PATHWAYS

.ý::GASEOUS

...E:FFLUENTS LIQUID EFFLUENTS

3. DIRECT RADIATION

4. DIRECT RADIATION

_ (SOIL DEPOSITION)

(AIR SUBMERSION)

1. SHORELINE DIRECT RADIATION (FISHING, PICNICING)

2. DIRECT RADIATION IMMERSION IN OCEAN, BOATING, SWIMMING)

INGESTION

% \\*

3. CONSUMPTION DEPOSITION 1

DEPOSITION INGESTION Figure 1.6 1-12

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Radiation Exposure Pathways 1-13

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 There are three major pathways in which liquid effluents affect humans:

external radiation from liquid effluents that deposit and accumulate on the shoreline; a

external radiation from immersion in ocean water containing radioactive liquids; and, internal radiation from consumption of fish and shellfish containing radioactivity absorbed from the liquid effluents.

There are six major ways in which gaseous effluents affect humans:

external radiation from an airborne plume of radioactivity; internal radiation from inhalation of airborne radioactivity; external radiation from deposition of radioactive effluents on soil; ambient (direct) radiation from contained sources at the power plant; internal radiation from consumption of vegetation containing radioactivity deposited on the vegetation from airborne deposition and absorbed from the soil due to ground deposition of radioactive effluents; and, internal radiation from consumption of milk and meat containing radioactivity deposited on forage that is eaten by cattle and other livestock.

In addition, ambient (direct) radiation emitted from contained sources of radioactivity at MPS contributes to radiation exposure in the vicinity of the plant. For example, small amounts of ambient radiation result from low-level radioactive waste being processed and stored at the site prior to shipping and disposal. Also, the operation of the ISFSI (Independent Spent Fuel Storage Installation, operation began in 2005) results in very small amounts of direct radiation at the site boundary.

The radiological dose impact on humans is based both on effluent analyses and modeling and on direct measurements of radiation and radioactivity in the environment.

When MPS-related radioactivity is detected in samples that represent a plausible exposure pathway, the resulting dose from such exposure is assessed (see Sections 4 and 5). However, the operation of Millstone Power Station results in releases of only small amounts of radioactivity, and, as a result of dilution in the atmosphere and ocean, even the most sensitive radioactivity measurement and analysis techniques cannot usually detect these tiny amounts of radioactivity above that which is naturally present in the environment. Therefore, radiation doses are calculated using radioactive effluent release data and computerized dose calculations that are based on conservative NRC-recommended models that tend to result in over-estimates of the resulting dose. These computerized dose calculations are performed by Dominion Nuclear personnel. These computer codes use the guidelines and methodology set forth by the NRC in Regulatory Guide 1.109 (Reference 7). The dose calculations are documented and described in detail in the Millstone Nuclear Power Station's Radiological Effluent Monitoring and Offsite Dose Calculation Manual (Reference 8), which has been reviewed by the NRC.

It should be emphasized that because of the conservative assumptions made in the computer code calculations, the maximum hypothetical dose to an individual *is considerably higher than the dose that would actually be received by a real individual.

1-14

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 After dose calculations are performed, the results are compared to the federal dose limits for the public. The two federal agencies that are charged with the responsibility of protecting the public from radiation and radioactivity are the Nuclear Regulatory Commission (NRC) and The Environmental Protection Agency (EPA).

The NRC, in 10CFR 20.1301 (Reference 9) limits the levels of radiation to unrestricted areas resulting from the possession or use of radioactive materials such that they limit any individual to a dose of:

a less than or equal to 100 mrem per year to the total body.

In addition to this dose limit, the NRC has established design objectives for nuclear plant licensees.

Conformance to these guidelines ensures that nuclear power reactor effluents are maintained as far below the legal limits as is reasonably achievable.

The NRC, in 10CFR 50 Appendix I (Reference 10) establishes design objectives for the dose to a member of the general public from radioactive material in liquid effluents released to unrestricted areas to be limited to:

less than or equal to 3 mrem per year to the total body; and, less than or equal to 10 mrem per year to any organ.

The air dose due to release of noble gases in gaseous effluents is restricted to:

less than or equal to 10 mrad per year for gamma radiation; and, less than or equal to 20 mrad per year for beta radiation.

The dose to a member of the general public from iodine-131, tritium, and all particulate radionuclides with half-lives greater than 8 days in gaseous effluents is limited to:

less than or equal to 15 mrem per year to any organ.

The EPA, in 40CFR190.10 Subpart B (Reference 11), sets forth the environmental standards for the uranium fuel cycle. During normal operation, the annual dose to any member of the public, at or beyond the site boundary, from the entire uranium fuel cycle shall be limited to:

less than or equal to 25 mrem per year to the total body; less than or equal to 75 mrem per year to the thyroid; and, less than or equal to 25 mrem per year to any other organ.

The summary of the 2008 radiological impact for Millstone Station and comparison with the EPA dose limits and Appendix I guidelines is presented in Section 5 of this report.

The third stage of assessing releases to the environment is the Radiological Environmental Monitoring Program (REMP). The description and results of the REMP at Millstone Power Station during 2008 is discussed in Sections 2 through 4 of this report.

1-15

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

2.

PROGRAM DESCRIPTION 2.1 Samplinq Schedule and Locations The sample locations and the sample types and frequency of analysis are given in Tables 2-1 and 2-2 and Figures 2.1 and 2.2. The program as described on Table 2-2 only lists the required samples as specified in the Radiological Effluent Monitoring and Offsite Dose Calculation Manual. However, in order to identify the locations of the extra samples, all locations (both required and extra) are listed in Table 2-1 and shown on the figures.

2-1

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 2 Environmental Monitorinq Proaram Samolina Tvyes and Locations Location Direction & Distance Number*

Location Name From Release Point**

Sample Types 1-1 2-1 3-1 4-1 5-1 6-1 7-1 8-1 9-1 10-1

'11-1 12-C 13-C 14-C 15-C 16-C 17-1 21-1 22-1 24-C 25-1 26-C 27-1 28-1 29-1 29-X 30-1 31-1 31-X 32-1 32-X 33-1 33-X 34-1 34-X 35-1 35-X 36-1 36-X 37-C On-site - Old Millstone Rd.

On-site - Weather Shack On-site - Bird Sanctuary On-site - Albacore Drive MP3 Discharge Quarry Discharge Environmental Lab Dock Environmental Lab Bay Point Beach Pleasure Beach New London Country Club Fisher's Island, NY Mystic, CT Ledyard, CT Norwich, CT Old Lyme, CT Site Boundary Goat Location #1 Goat Location #2 Goat Location #4 Within 10 Miles Beyond 10 Miles Niantic Two Tree Island West Jordan Cove West Jordan Cove Niantic Shoals Niantic Shoals Niantic Shoals Vicinity of Discharge Vicinity of Discharge Seaside Point Seaside Point Thames River Yacht Club Thames River Yacht club Niantic Bay Niantic Bay Black Point Black Point Giant's Neck 0.3 Mi, S 0.3 Mi, NE 1.0 Mi, N 0.1 Mi, SSE 0.3 Mi, SSE 0.3 Mi, SE 0.3 Mi, SE 0.4 Mi, W 1.2 Mi, E 1.6 Mi, ENE 8.0 Mi, ESE 11.5 Mi, ENE 12.0 Mi, NE 14.0 Mi, N 8.8 Mi, W 0.5 Mi, NE 2.0 Mi, N 2.7 Mi, NE 29.0 Mi, NNW Within 10 Miles Beyond 10 Miles 1.7 Mi, WNW 0.8 Mi, SSE 0.4 Mi, NNE 0.4 Mi, NNE 1.5 Mi, NNW 1.8 Mi, NW 1.8 Mi, NW

< 0.1 Mi

< 0.1 Mi 1.8 Mi, ESE 1.8 Mi, ESE 4.0 Mi, ENE 4.0 Mi, ENE 0.3 Mi, WNW 0.3 Mi, WNW 3.0 Mi, WSW 3.0 Mi, WSW 3.5 Mi, WSW 0.6 Mi, NNW TLD, Air Particulate, Iodine, Vegetation TLD, Air Particulate, Iodine TLD, Air Particulate, Iodine, Soil TLD, Air Particulate, Iodine, Soil TLD TLD TLD TLD TLD TLD, Air Particulate, Iodine, Vegetation TLD, Air Particulate, Iodine TLD TLD TLD, Soil TLD, Air Particulate, Iodine TLD Vegetation Milk Milk Milk Fruits & Vegetables Fruits & Vegetables TLD, Air Particulate, Iodine Mussels Clams Bottom Sediment, Fucus Mussels Bottom Sediment, Oysters Scallops Bottom

Sediment, Oysters, Lobster, Fish, Seawater Fucus Bottom Sediment Fucus Bottom Sediment Oysters Lobster, Fish Bottom

Sediment, Clams, Fucus Oysters Fucus Bottom

Sediment, Oysters, Seawater

Key:

I - Indicator C - Control X - Extra - sample not required by REMODCM 2-2

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

- The release points are the MP1 stack for terrestrial locations and the quarry cut for aquatic locations.

2-3

Dominion Nuclear Connecticut, Inc.

Report Millstone Station Annual Radiological Environmental Operating 2008 Location Direction & Distance Number*

Location Name From Release Point" Sample Types 37-X 38-1 39-X 40-X 41-1 42-1 43-1 44-1 45-1 46-1 47-1 48-1 49-1 50-I 51-1 52-1 53-1 55-1 56-1 57-1 59-1 60-1 61-1 62-1 63-1 64-1 65-1 Giant's Neck Waterford Shellfish Bed #1 Jordon Cove Bar Quarry Myrock Avenue Billow Road Black Point Onsite - Schoolhouse Onsite Access Road Old Lyme - Hillcrest Ave.

East Lyme - W. Main St.

East Lyme - Corey Rd.

East Lyme - Society Rd.

East Lyme - Manwaring Rd.

East Lyme - Smith Ave.

Waterford - River Rd.

Waterford - Gardiners Wood Rd.

Waterford - Magonk Point New London - Mott Ave.

New London - Ocean Ave.

Waterford -Miner Ave.

Waterford - Parkway South Waterford - Boston Post Rd.

East Lyme - Columbus Ave.

Waterford - Jordon Cove Rd.

Waterford - Shore Rd.

Waterford - Bank St.

NAP Parking Lot -

Fitness Center Golden Spur Pleasure Beach Onsite Well Onsite Well Site Switchyard Fence Ball Field Foul Pole Waterford - Windward Way &

Shotgun Onsite Well - ISFSI Control Onsite Well - ISFSI Indicator Onsite Well - ISFSI Indicator Onsite Well Onsite Well Onsite Well Onsite Well Onsite Well Onsite Well Onsite Well Onsite Well DEP Dock Thames River 3.5 Mi, WSW 1.0 Mi, NW 0.8 Mi, NE 3.2 Mi, ENE 2.4 Mi, WSW 2.6 Mi, SW 0.1 Mi, NNE 0.5 Mi, NNW 4.6 Mi, WSW 4.5 Mi, W 3.4 Mi, WNW 3.6 Mi, NW 2.1 Mi, W 1.5 Mi, NW 1.1 Mi, NNW 1.4 Mi, NNE 1.8 Mi, ESE 3.7 Mi, E 3.6 Mi, ENE 3.4 Mi, NNE 4.0 Mi, N 4.3 Mi, NNW 1.9 Mi, WNW 0.8 Mi, NE 1.1 Mi, ENE 3.2 Mi, NE 0.4 Mi, NW 4.7 Mi, NNW 0.8 Mi, E Onsite Onsite 0.3 Mi, N 0.6 Mi, N 0.5 Mi, NE Up-gradient of ISFSI Down-gradient of ISFSI Down-gradient of ISFSI Onsite Onsite Onsite Onsite Onsite Onsite Onsite Onsite Onsite 4 Mi, E Lobster Clams Bottom Sediment, Clams Fish TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD TLD Bottom Sediment Bottom Sediment Well Water Well Water TLD TLD TLD Well Water Well Water Well Water Well Water Well Water Well Water Well Water Well Water Well Water Well Water Well Water Oysters Fucus 66-X 67-X 69-X 71-1 72-1 73-X 74-X 75-X 76-X 77-X 78-X 79-1 80-1 81-1 82-1 83-1 84-1 85-1 86-1 88-X 90-C

Key:

I - Indicator C - Control X - Extra - sample not required by the REMODCM 2-4

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

- The release points are the MP1 stack for terrestrial locations and the quarry cut for aquatic locations.

2-5

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station Table 2-2 Required Sampling Frequency & Type of Analysis 2008 Exposure Pathway No. of Sampling & Collection Type of Analysis and/or Sample*

Location Frequency S

1.

Gamma Dose 40a Quarterly Gamma Dose - Quarterly Environmental TLD

2.

Airborne Particulate 8

Continuous sampler - weekly Gross Beta - Weekly filter change Gamma Spectrum - Quarterly on composite (by location), and on individual sample if gross beta is greater than 10 times the mean of the weekly control station's gross beta results

3.

Airborne Iodine 8

Continuous sampler"',weekly 1-131 - Weekly canister'change.

4.

Vegetation 5

One sample near.middle and Gamma Isotopic on each sample one near end of growing season

5.

Milk 2

Semimonthly when animals are Gamma Isotopic and 1-131 on each on pasture; monthly at other sample; Sr-89 and Sr-90 on times.

quarterly composite

a.

Pasture Grass 3

Sample as necessary to Gamma Isotopic and 1-131 on each substitute for unavailable milk..

sample

6.

Sea Water 2

Continuous sampler with a

.Gamma Isotopic and Tritium on monthly collection at indicator each sample.

location. Quarterly at control location - Composite of 6,.

weekly grab samples.,

6a.

Well Water 6

Semiannual Gamma Isotopic and Tritium on each sample

7.

Bottom Sediment 5

Semiannual Gamma Isotopic on each sample 7a.

Soil 3

Annually Gamma Isotopic on each sample

8.

Fin

-Fish-Flounder 2

Quarterly Gamma Isotopic on each sample and one other type of edible fin fish

9.

Mussels 2

Quarterly Gamma Isotopic on each sample (edible portion)

10.

Oysters 4

Quarterly Gamma Isotopic on each sample (edible portion)

11.

Clams 2

Quarterly Gamma Isotopic on each sample (edible portion)

12.

Lobster 2,

Quarterly Gamma Isotopic on each sample (edible portion)

(a)

Two or more TLDs or TLD with two or more elements per location.

2-6

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 L*11g,Siand Sotin IJ TLD Monitoring (only)

TLD and Air Monitoring (particulates & iodine)

Terrestrial Monitoring (milk, grass, fruit & vebetables, soil, or leaves)

Aquatic Monitoring (seawater, sediment, flora, fish, mussel, oyster, dam, or lobster)

Fi~shs Wland 2-5

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 2.2 Millstone Sampling Locations (Within 2 miles)

LIj IU 74 63 64 75 outw Jorden Cove dk -

N A

a1~ stu*ck b

r 2-6

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 2.2 Samples Collected During Report Period The following table summarizes the number of samples of each type analyzed during 2008:

collected and Number of Number of Technical Technical Sample Type Specification Specification Number of "Required Samples Required Samples Extra Samples "Analyzed Analyzed Gamma Exposure (Environmental.TLD)

Air Particulates Air Iodine Soil Goat Milk Pasture Grass Fruit and Vegetables Broad Leaf Vegetation Well Water Sea Water

.'Bottom Sediment

-;Aquatic Flora Fish 160 41.6 416 136 38 Variable 2

ý8 6

12 16 -

10 0

16 160 416 416 S'11.

,'27 8

6 12 16 10 0

123 8

3" 15 16 0

0 0

0 4

1 12 39 0

10 24 4

Mussels

¢ Oysters "Clams Lobster Total All Types 16 8

8 1,141 0

4 8

1,136 8

4 126 1 Pasture grass sampled as necessary to substitute for unavailable milk. HHay or grain was 2 substituted when grass was not available.,

3 Depends upon availability of goat milk samples Due toý sample unavailability, not all required fish and shellfish samples could be obtained (see Notes at end of Section 3 for details)

C 2-7

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

3.

RADIOCHEMICAL RESULTS 3.1 Summary Table In accordance with the Radiological Effluent Monitoring and Offsite Dose Calculation Manual (REMODCM),Section I.F.1, a summary table of the radiochemical results has been prepared and is presented on the following pages.

The mean and range recorded are based only upon detectable measurements.

The parentheses indicate the fraction of the measurements that are considered above the detection limit for each individual analysis.

A more detailed analysis of the data is given in Section 4.0 where a discussion of the variations in the data explains many aspects that are not evident in the Summary Table because of the basic limitation of data summaries. The data summaries include the extra

("X") samples collected throughout the year. These samples are taken to enhance the monitoring program, or are the results of special studies.

3-1

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 TLD (uR/hr)

Gamma 176 Dose AP Gross Beta Gross 416 Beta (le-3 pCi/m3)

Air Iodine 1-131 416 (le-3 pCi/m3)

AP Gamma Ba-140 32 (le-3 pCi/m3)

Be-7 32 Ce-141 32 Ce-144 32 Co-58 32 Co-60 32 Cr-51 32 Cs-134 32 Cs-137 32 Mn-54 32 Nb-95 32 Ru-103 32 Ru-106 32 Zr-95 32 8.04 (156/156) 08 (4.88-12.1) 10 19.6 (364/364) 11 (7.9-39.3) 70 (0/364)

(0/28) 109 (28/28) 11 (58-149)

(0/28)

(0/28) 50 (0/28) 60 (0/28)

(0/28)

(0/28) 0.3 mi SE 11.6.(4/4) 1.6 mi ENE 20.4 (52/52)

(12-32.3)

< LLD

< LLD 1.6 mi ENE 125(4/4)

(95-149)

< LLD

< LLD 8.44 (20/20)

(5.91-11.2) 20 (52/52)

(10.2-34.4)

(0/52)

(0/4) 103 (4/4)

(95-122)

(0/4)

(0/4) 3-2

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Soil Be-7 (pCi/g dry)

Ce-141 Ce-144 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 K-40 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 0.15 0.18 (0/2)

(0/2)

(0/2) 0.538 (2/2)

(0.485-0.59)

(0/2) 11.2 (2/2)

(10.2-12.1)

(0/2)

(0/2) 0.9 (2/2)

(0.7-1.1)

(0/2)

< LLD

< LLD 14-C 12.0 mi NE 1.14 (1/1)

(1.14-1.14)

LLD 04 1.0mi N 12.1 (1/1)

(12.1-12.1)

LLD

< LLD

< LLD 14-C 12.0 mi NE 1.17(1/1)

(1.17-1.17)

< LLD

< LLD (0/1)

.(0/1)

(0/1)

(0/1) 1.14(1/1)

(1.14-1.14)

(0/1) 10.3(1/1)

(10.3-10.3)

(0/1)

(0/1) 1.17 (1/1)

(1.17-1.17)

(0/1)

(0/1) 1 3-3

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Goat Milk Ba-140 11 (pCi/L)

Cs-134 11 Cs-137 11 1-131 11 K-40 11 70 (0/8) 15 (0/8) 18 2.5 (1/8)

(2.5-2.5) 1 (0/8) 1105(8/8)

(728-1450) 25 (0/8)

(0/2) 1.8(1/2)

(1.8-1.8)

(0/15)

La-140 Sr-89 Sr-90 Ba-140 11 3

3 31

< LLD LLD 21 2.0 mi N 2.5 (1/8)

(2.5-2.5)

< LLD 24-C 29.0 mi 1650 (3/3)

NNW (1580-1720)

< LLD LLD 21 2.0 mi N 1.8 (1/2)

(1.8-1.8)

LLD 24-C 29.0 mi 1.19 (11/16)

NNW (0.34-5.34)

< LLD

< LLD (0/3)

(0/3)

Pasture Grass (Hay)

(pCi/g wet)

Be-7 31 Ce-141 Ce-144 Co-58 31 31 31 0.985 (4/15)

(0.63-1.31)

(0/15)

(0/3) 1650 (3/3)

(1580-1720)

(0/3)

(0/1)

(0/16) 1.19 (11/16)

(0.34-5.34)

(0/16)

(0/16) 0.069 (3/16)

(0.042-0.103)

(0/16)

Co-60 31 Cr-51 31 (0/15)

(0/15)

< LLD

" LLD Cs-134 Cs-137 31 31 0.06 0.08 24-C 29.0 mi NNW

< LLD 0.069 (3/16)

(0.042-0.103)

< LLD Fe-59 31 3-4

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Pasture Grass 1-131 (Hay)

(pCi/g wet)

K-40 La-140 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 Well Water Ba-140 (pCi/L)

Be-7 Co-58 Co-60 Cr-51 Cs-134 Cs-137 0.06 (0/15) 8.77 (15/15)

(2.8-24.4)

(0/15)

(0/15) 0.194 (1/15)

(0.194-0.194)

(0/15)

(0/15) 60 (0/51)

(0/51) 15 (0/51) 15 (0/51)

(0/51) 15 (0/51) 18 (0/51)

< LLD 22 2.7 mi 10.9 (2/2)

NE (10-11.8)

< LLD

< LLD 24-C 29.0 mi 0.22 (1/16)

NNW (0.22-0.22)

< LLD

<LLD S -

< LLD S -

< LLD

< LLD S -

< LLD (0116) 6.73 (16/16)

(1.02-13.3)

(0/16)

(0/16) 0.22 (1/16)

(0.22-0.22)

(0/16)

(0/0)

(0/0) 3-5

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental. Operating Report 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Medium or Pathway Sampled (Units)

Analysis Total Type No Indicator Locations LLD Mean Rang Location with Highesst Mean Control Non-Locations Routine Reported Mean Range Mean Measure-e Range ments Distance Direction Well Water Fe-59 (pCi/L) 51 30 (0/51)

< LLD H-3 51 2000 2310 (1/51)

(2310-2310) 1-131 51 15 (0/51) 86 2310(1/4)

(2310-2310)

< LLD K-40 51 167 (3/51)

(70-328) 80 216 (2/4)

(103-328)

La-140 51 15 (0/51)

Mn-54 51 15 (0/51)

Nb-95 51 15 (0/51)

Ru-103 51 Ru-106 51 Sb-125 51 Sr-89 51 Sr-90 51 Th-228 51 (0/51)

(0/51)

(0/5 1)

(0/51)

(0/5 1) 13.8 (3/51)

(12.4-14.6)

" LLD

< LLD

" LLD

" LLD (0/0)

(0/0)

(0/0) 85 14.5 (2/4)

(14.4-14.6)

Zn-65 51 30 (0/51)

Zr-95 51 30 (0/51)

< LLD

< LLD 3-6

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Fruits &

Ba-140 ' 9 (0/5)

< LLD Vegetables (pCi/g wet)

Be-7 Ce-141 Ce-144 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 La-140 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 0.33 (1/5)

(0.33-0.33)

(0/5)

(0/5) 0.06 (0/5) 0.08 (0/5)

(0/5) 0.06 (0/5) 2.43 (5/5)

(1.03-5.69)

(0/5)

(0/5) 25 10- mi 0.33(1/5)

(0.33-0.33)

< LLD

< LLD 25 10-mi 2.43(5/5)

(1.03-5.69)

< LLD S -

< LLD

< LLD (0/4)

(0/4)

(0/4) 1.91 (4/4)

(0.89-2.77)

(0/4)

(0/4) 3-7

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Fruits &

Th-228 9

(0/5)

< LLD.

(0/4)

Vegetables (pCi/g wet)

Zn-65 9

Zr-95 9

Broadleaf Ba-140 18 Vegetation (pCi/g wet)

(0/5)

(0/18)

< LLD

" LLD Be-7 18 Ce-141 18 Ce-144 18 Co-58 18 Co-60 18 Cr-51 18 Cs-134 18 Cs-137 18 Fe-59 18 1-131 18 K-40 18 La-140 18 Mn-54 18 Nb-95 18 1.17 (17/18)

(0.41-2.27)

(0/18)

(0/18) 17 0.5 mi NE 1.3(5/6)

(0.68-2.03)

LLD S -

< LLD

< LLD 0.06 0.08 0.06 (0/18)

(0/18)

" LLD

< LLD

" LLD

" LLD (0/4)

(0/4)

(0/0)

(0/0) 4.15 (18/18) 10 (2.49-15.5)

(0/18)

(0/18) 1.2 mi E 5.9(6/6)

(3.17-15.5)

< LLD

< LLD 3-8

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Broadleaf Ru-103 18 Vegetation (pCi/g wet)

Ru-106 18 Sb-125 18 Th-228 18 Zn-65 18 Zr-95 18 Sea Water Ba-140 16 (pCi/L)

Be-7 16 Co-58 16 Co-60 16 Cr-51 16 Cs-134 16 Cs-137 16 Fe-59 16 H-3 16 1-131 16 K-40 16 La-140 16 (0/18)

(0/18)

(0/18) 0.223 (2/18) 17 (0.206-0.24)

(0/18)

(0/18) 60 (0/12)

(0/12) 15 (0/12) 15 (0/12)

(0/12) 15 (0/12) 18 (0/12) 30 (0/12) 2000 592 (9/12) 32 (280-1110) 15 (0/12) 283 (12/12) 32 (228-352) 15 (0/12)

< LLD

< LLD 0.5 mi NE 0.223 (2/6)

(0.206-0.24)

< LLD

< LLD 592 (9/12)

(280-1110)

< LLD 283 (12/12)

(228-352)

< LLD (0/0)

(0/0)

(0/4)

(0/4) 243 (4/4)

(181-330)

(0/4) 3-9

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Sea Water Mn-54 16 (pCi/L)

Nb-95 16 Ru-103 16 Ru-106 16 Sb-125 16 Th-228 16 Zn-65 16 Zr-95 16 Bottom Ag-20 Sediment 110m (pCi/g dry)

Be-7 20 Co-58 20 Co-60 20 15 15 (0/12)

(0/12)

(0/18)

< LLD

" LLD

< LLD

" LLD 30 30 (0/4)

(0/4)

(0/2)

,(0/2)

(0/2)

(0/2) 0.96 (1/18)

(0.96-0.96)

(0/18)

(0/18) 67-X 4.7 mi NNW 0.96 (1/2)

(0.96-0.96)

< LLD

< LLD Cr-51 20 Cs-134 20 Cs-137 20 Fe-59 20 1-131 20 K-40 20 Mn-54 20 (0/18)

(0/18)

" LLD

" LLD 0.15 0.18 0.154 (4/18)

(0.082-0,218)

(0/18)

(0/18) 16.2 (18/18)

(12.8-19.8)

(0/18) 67-X 4.7 mi NNW 0.194 (2/2)

(0.169-0.218)

< LLD

< LLD (0/2)

(0/2)

(0/2) 16.3 (2/2)

(15.4-17.2)

(0/2) 39-X 0.8 mi NE 18.5 (2/2)

(17.3-19.8)

< LLD 3-10

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Bottom Sediment (pCi/g dry)

Aquatic Flora (pCi/g wet)

Nb-95 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 (0/18)

(0/18)

(0/18) 1.07 (13/18)

(0.52-1.68)

(0/18)

(0/20) 0.18 (5/20)

(0.136-0.23)

(0/20)

(0/20) 0.041 (1/20)

(0.041-0.041) 6.1 (20/20)

(4.49-8.53)

(0/20)

< LLD S

< LLD LLD

< LLD 31 1.8 mi NW 1.56 (2/2)

(1.44-1.68)

LLD

< LLD S -

< LLD 35-X 0.3 mi 0.23 (1/4)

WNW (0.23-0.23)

< LLD S

< LLD S -

< LLD 33-X 1.8 mi ESE 0.041 (1/4)

(0.041-0.041) 32-X 6.76 (4/4)

(5.45-8.53)

< LLD

< LLD (0/2)

(0/2)

(0/2).

(0/2) 0.31 (1/2)

(0.31-0.31)

(0/2)

(0/4) 0.162 (1/4)

(0.162-0.162)

(0/4)

(0/4) 0.04 (1/4)

(0.04-0.04) 6.02 (4/4)

(5.4-7.22)

(0/4)

(0/4) 3-11

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Aquatic Flora (pCi/g wet)

Fish-Flounder (pCi/g wet)

Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 Ru-103 0.13 0.13 0.13 0.15 0.26 0.13 (0/20)

(0/20)

(0/20) 0.065 (3/20)

(0.056-0.083)

(0/20)

(0/6)

(0/6) 3.92 (6/6)

(3.39-4.61)

(0/6)

(0/6) 29-X 0.4 mi NNE 32

< LLD

< LLD 0.083 (1/4)

(0.083-0.083)

< LLD

" LLD

< LLD

< LLD 4.13 (3/3)

(3.6-4.61)

" LLD.

< LLD

" LLD (0/4)

(0/4)

(0/4) 0.071 (1/4)

(0.071-0.071)

(0/4)

(0/0)

(0/0) 3-12

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Fish-Ru-106 Flounder (pCi/g wet)

Sb-125 Th-228 Zn-65 Zr-95 Ag-Fish-Other 110m (pCi/g wet)

Be-7 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 Ru-103 Ru-106 6

6 6

10 (0/6)

(0/6)

(0/10)

< LLD

" LLD

< LLD

" LLD 0.26 0.13 0.13 0.13 0.15 0.26 0.13 (0/10)

(0/10)

(0/10) 3.55 (10/10)

(2.3-4.11)

(0/10)

< LLD

< LLD S -

< LLD

< LLD 35 0.3 mi 3.72 (3/3)

WNW (3.4-4.11)

LLD

< LLD

< LLD (0/0)

(0/0)

(0/0) 3-13

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Fish-Other Sb-125 (pCi/9 wet)

Th-228 Zn-65 Zr-95 Mussels Ag-(pCi/g wet) 110i Be-7 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 0.26 0.13 0.13 0.13 0.15 0.26 0.13 (0/10)

(0/10)

(0/8)

(0/8) 2.13 (8/8)

(1.4-3.4)

(0/8)

" LLD

< LLD

" LLD

< LLD

" LLD 2.49 (4/4)

(2.05-3.4)

<LLD

" LLD

< LLD

< LLD (0/0)

(0/0)

.(0/0)

(0/0)

(0/0) 30 1.5 mi NNW 3-14

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Mussels Th-228 (pCi/g wet)

Zn-65 Zr-95 Oysters Ag-(pCi/g wet) 11li Be-7 Co-58 8

(0/8)

< LLD (0/0) 8 0.26 (0/8)

< LLD (0/0) 8 (0/8)

< LLD (0/0) 20 20 20 0.158 (3/16)

(0.076-0.229)

(0/16)

(0/16) 32 0.158(3/4)

(0.076-0.229)

" LLD

" LLD 0.13 Co-60 20 0.13 Cr-51 20 Cs-134 20 0.13 Cs-137 20 0.15 (0/16)

(0/16)

Fe-59 1-131 K-40 Mn-54 Nb-95 Ru-103 Ru-106 20 20 20 20 20 20 20 0.26 0.13 (0/16)

(0/16) 1.82 (15/16)

(1.28-3.2)

(0/16)

< LLD

< LLD 2.04 (4/4)

(1.65-2.5)

< LLD

< LLD (0/4)

(0/4)

(0/4) 2.04 (4/4)

(1.65-2.5)

(0/4)

(0/4) 37-C 3.5 mi WSW Sb-125 20 Th-228 20 (0/16)

(0/16)

< LLD

< LLD (0/4) 3-15

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Oysters Zn-65 (pCi/g wet)

Zr-95 Clams Ag-110m (pCi/g wet)

Be-7 Co-58 20 0.26 (0/16)

< LLD (0/4) 20 (0/16)

< LLD (0/4) 16 (0/16)

< LLD (0/0) 16 16 (0/16)

(0/16)

< LLD

< LLD 0.13 Co-60 16 0.13 (0/16)

Cr-51 16 (0/16)

Cs-134 16 0.13 (0/16)

Cs-137 16 0.15 (0/16)

Fe-59 16 0.26 (0/16) 1-131 16 (0/16)

K-40 16 2.15 (16/16)

(1.51-2.72)

Mn-54 16 0.13 (0/16)

Nb-95 16 (0/16)

< LLD

< LLD LLD 29 0.4 mi NNE 2.31 (4/4)

(2.15-2.42)

LLD

< LLD (0/0)

(0/0)

Ru-103 16 Ru-106 16 Sb-125 16 (0/16)

(0/16)

" LLD

< LLD

" LLD

< LLD Th-228 Zn-65 16 16 0.26 3-16

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

DOCKETS 50-245, 50-336 & 50-339 Clams (pCi/g wet)

Lobsters (Crabs)

(pCi/g wet)

Zr-95 Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 (0/16)

(0/12)

(0/12) 0.13 (0/12) 0.13 (0/12)

(0/12) 0.13 (0/12) 0.15 (0/12) 0:26 (0/12)

(0/12) 2.32 (12/12)

(1.56-2.82) 0.13 (0/12)

(0/12)

(0/12) 0.26 (0/12)

(0/12)

< LLD

-<<LLD

< LLD

'< LLD

< LLD

< LLD 37-X 3.5 mi 2.66 (4/4)

WSW (2.39-2.82)

< LLD

< LLD S -

< LLD (0/0)

(0/0)

Zr-95 12 3-17

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 NOTES FOR

SUMMARY

TABLE For gamma measurements the Minimum Detectable Level (MDL) -

the Lower Limit of Detection (LLD) / 2.33. For all others, MDL = 2 x (the standard deviation of the background). These MDLs are based on the absence of large amounts of interfering activity (excluding naturally occurring radionuclides). Deviations by factors of 3 to 4 can occur.

The LLD at a confidence level of 95% is the smallest concentration of radioactive material in a sample that will be detected with a 5% probability of falsely concluding that a blank observation represents a "real" signal.

For a particular measurement system (which may include radiochemical separation):

LLD =

4.66 Sb E

V

2.22

Y* exp (-AAt)

where, LLD is the lower limit of detection as defined above (as pCi per unit mass or volume)

Sb is the standard deviation of the background counting rate or of the counting rate of a blank sample as appropriate (as counts per minute)

E is the counting efficiency (as counts per transformation)

V is the sample size (in units of mass or volume) 2.22 is the number of transformation per minute per picoCurie Y

is the fractional radiochemical yield (when applicable)

A is the radioactive decay constant for the particular radionuclide kt is the elapsed time between sample collection (or end of the sample collection period) and time of counting The LLD is defined as "a priori" (before the fact) limit representing the capability of a measurement system and not an "a posteriori" (after the fact) limit for a particular measurement.

Analyses shall be performed in such a manner that the stated LLDs will be achieved under routine conditions. Occasionally background fluctuations, unavoidably small sample sizes, the presence of interfering nuclides, or other uncontrollable circumstances may render these a priori LLDs unachievable.

In such cases, the contributing factors will' be identified and described in this report (see Notes for Section 3 or Section 4). As shown in the equation above, for composite samples taken over a period of time, the LLD is decayed to the end of the sample period.

The listed 1-131 LLD for all the vegetation samples is for leafy vegetables.

The 1-131, Ba-140 and La-140 LLDs for the water samples are from end of sample period.

3-18

Dominion Nuclear Connecticut, Inc.

Annual. Radiological Environmental Operating Report Millstone Station 2008 3.2 Data Tables The data reported in this section are strictly counting statistics. The reported error is two times the standard deviation (2a) of the net activity. Unless otherwise noted, the overall error (counting, sample size, chemistry, errors, etc.) is estimated to be 2 to 5 times that listed. Results are considered positive when the measured value exceeds 1.5 times the listed 2a error (i.e., the measured value exceeds 3cy). Any errors listed as zero are the artifact that there were no background counts in the area of the peak for these nuclides.

Because of counting statistics, negative values, zeros and numbers below the Minimum Detectable Level (MDL) are statistically valid pieces of data. For the purposes of this report, in order to indicate any background biases, all the valid data are presented. This practice was recommended by Health and Safety Laboratory (HASL) ("Reporting of Analytical Results from HASL," letter by Leo B. Higginbotham), NUREG 0475 and NUREG/CR-4007 (Sept. 1984).

In instances where zeros are listed after significant digits, this is an artifact of the computer data-handling program.

Data are given according to sample type as indicated below.

1. Gamma Exposure Rate

2. Air Particulates, Gross Beta Radioactivity

3. Air Particulates, Weekly 1-131

4. Air Particulates, Quantitative Gamma Spectra

5. Air Particulates, Quarterly Strontium*

6. Soil

7.

Milk - Dairy Farms*

8.

Milk - Goat Farms

9. Pasture Grass

10. Well Water

11. Reservoir Water*

12. Fruits & Vegetables

13. Broad Leaf Vegetation

14. Seawater

15. Bottom Sediment

16. Aquatic Flora

17. Fin Fish

18. Mussels

19. Oysters

20. Clams

21. Scallops*

22. Lobster (and Crabs)

This type of sampling or analysis was not performed; therefore there is no table for these.

3-19

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 1, Quarterly TLD Gamma Exposure Rate (uR/hr)

Location First Second Third Fourth

Average, Number Quarter.

Quarter Quarter Quarter d2s.d.

01 02 03 04 05 06 07 08 09 10 11 12-C 13-C 14-C 15-C 16-C 27 41 42 43 44 45 46 47 48 49 50 51 52 53 55 56 57 59 60 61 62 63 64 65 8.18 +/- 0.31 8.94 +/- 0.61 6.66 +/- 0.35 8.05 + 0.50 9.09 + 0.33 7.91 +/- 0.29 5.05 +/- 0.31 11.06 +/- 0.49 8.70 - 0.39 9.46 - 0.55 6.90 +/- 0.36 7.21 - 0.29.

10.23 -0.41 9.10+/- 0.34 7.16 0.39 5.91 + 0.35 8.25 +/- 0.37 6.44 +/- 0.50 7.36 +/- 0.54 6.62 +/- 0.30 8.25 +/- 0.31 7.26 +/- 0.35 7.84 +/- 0.31 7.23 +/- 0.42 9.41 +/- 0.50 6.59 +/- 0.27 7.51 +/- 0.36 6.10 4- 0.37 6.66 +/- 0.28 7.34 +/- 0.30 7.47 +/- 0.29 6.57 +/- 0.32 7.09 +/- 0.50 7.34 +/- 0.38 6.85 1 0.35 7.41 +/- 0.40 7.98 +/- 0.32 8.54 +/- 0.51 7.33 +/- 0.34 7.59 +/- 0.27 8.05 +/- 0.46 9.72 +/- 0.60 6.95 +/- 0.38 8.16 +/- 0.43 9.52 +/- 0.38 8.52 +/- 0.52 4.88 +/- 0.54 11.78 - 0.72 9.26 -4 0.37 10.19 o 0.56 7.18 + 0.36 7.54 0 0.31 10.26 A- 0.54 9.62 A- 0.45 7.82 1- 0.35 6.40 +/-- 0.39 8.67 +/-- 0.32 6.57 +/-- 0.25 8.02 +/- 0.30 6.66 +/- 0.31 8.75 +/-z 0.37 7.08 +/-z 0.35 7.88 +/- 0.49 7.78 +/-- 0.34 9.53 +/- 0.45 6.98 +/-- 0.39 7.85 +/-z 0.45 6.38 A 0.32 7.23 +/-z 0.38 7.16 A 0.36 7.13 Az 0.27 6.81 +/- 0.26 7.19 +/- 0.39 7.66 + 0.41 6.74 +/- 0.26 7.19 +/-0.34 7.97 A- 0.31 9.01 +/- 0.35 7.45 +/- 0.29 7.99 +/- 0.38 9.28 Az 0.19 10.25 Az 0.24 7.29 ÷ 0.23 9,23 A- 0.30 10.73 A- 0.35 8.97 - 0.44 5.41 A-0.31 12.12 Az 0.26 10.25 -z 0.22 9.86 40.30 7.65 A- 0.21 8.14 -0.22 11.22 +/- 0.44 10.354-0.32 8.31 +/--0.18 6.98 - 0.28 8.53 +/-- 0.18 7.59 +/- 0.33 8.94 +/- 0.40 7.37 +/- 0.29 8.73 +/-z 0.19 8.22 +/-- 0.29 8.37 - 0.32 8.84 +/-- 0.28 10,65 +/-- 0.36 7.76 Az 0.17 8.61 Az 0.27 6.98 A 0.38 7.89 Az 0.26 8.15 +/-- 0.23 8.46 Az 0.43 7.63 Az 0.19 8.06 +/- 0.25 8.53 +/-- 0.22 8.04 +/- 0.30 8.60 +/-z 0.19 8.95 +/- 0.24 9.73 Az 0.33 8.21 +/--0.18 8.68 +/- 0.24 8.30 Az 0.25 9.08 Az 0.29 6.96 +/-L 0.27 7.79 Az 0.33 9.28 +/- 0.44 8.60 +/-z 0.42 5.17. +/-0.18 11.31 Az 0.34 10.15 Az 0.95 9.47 A 0.35 7.29 Az 0.26 7.62 + 0.25 11.09 Az 0.36 9.81 Az 0.44 7.44 Az 0.30 6.55 Az 0.42 8.18 A 0.36 7.09 Az 0.24

8.01 Az 0.32 7.02 Az 0.28 8.65A 0.44 7.61 Az 0.25 8.63 Az 0.34 7.85 Az 0.26 9.37 Az 0.43 7.21 Az 0.42 8,27 Az 0.33 6.52 Az 0.22 7.59 Az 0.28 7.49 Az 0.25 7.97 +/- 0.25 7.14 Az 0.34 7.31 Az 0.24 8.40 Az 0.28 6.93 A- 0.22 7.96 Az 0.37 8.46 Az 0.27 9.34 Az 0.30 7.56 Az 0.25 8.48 A 0.27 8.45 Az 0.97 9.50 +/- 1.05 6.97 Az 0.45 8.31 A 1.10 9.66+/- 1.28 8.50 Az 0.76 5.13 +z 0.39 11.57 Az 0.82 9.59 4 1.28 9.75.+/- 0.61 7.26 0.54 7.63 Az 0.67 10.70 A- 0.91 9.72 A 0.89 7.68 Az 0.86 6.46 -z 0.76 8.41 Az 0.40 6.92 Az 0.91 8.08 +ý 1.13 6.92 +/- 0.61 8.60 A- 0.41 7.54 Az 0.87 8.18 Az 0.67 7.93 Az 1.16 9.74 Az 1.06 7.14 A 0.85 8.06 +/-z 0.83 6.50 Az 0.64 7.34 Az 0.92 7.54 +/- 0.75 7.76 +/-z 1.01 7.04 +/- 0.79 7.41 +/- 0.76 7.98 +/- 1.00 7.14 +/- 1.05 7.79 +/- 1.09 8.34 +/- 0.81 9.16 Az 0.87 7.64 Az 0.68 8.19 +/- 0.85 3-20

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 1, Quarterly TLD Gamma Exposure Rate (uR/hr)

Location First Second Third Fourth Average Number Quarter Quarter Quarter Quarter

+/- 2 s.d.

66-X 73-X 74-X 75-X 6.84 +/- 0.27 8.95 +/- 0.63 7.33 +/- 0.47 6.53 +/- 0.44 6.95 +/- 0.38 8.77 +/- 0.51 7.38 +/- 0.30 6.99 +/- 0.28 7.71 +/- 0.24 10.08 0.33 8.54 + 0.20 8.11 +/- 0.28 7.32 10.33 9.38 +/- 0.37 7.81: +/- 0.37 7.14 +/- 0.30 7.21 + 0.68 9.30 +/-1.01 7.77 +/- 0.97 7.1.9- +/-1.15 3-21

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 2, Air Particulate Gross Beta Radioactivity (le-3 pCi/m3)

Locations Collection Date JANUARY 12/31 - 01/06 01/07 - 01/13 01/14 - 01/20 01/21 - 01/27 FEBRUARY 01/28 - 02/03 02/04 - 02/10 02/11 - 02/17 02/18 - 02/24 MARCH 02/25,- 03/02 03/03 - 03/09 03/10 - 03/16 03/17 - 03/23 03/24 - 03/30 Qtr Avg +/-12 sd JANUARY 12/31 - 01/06 01/07 - 01/13 01/14 - 01/20 01/21 - 01/27 FEBRUARY 01/28 - 02/03 02/04 - 02/10 02/11 - 02/17 02/18 - 02/24 MARCH 02/25 - 03/02 03/03 - 03/09 03/10 - 03/16 03/17 - 03/23 03/24 - 03/30 Qtr Avg +/- 2 sd 01 34.7 +/- 4.9 13.0 +/- 3.2 22.1 +/- 3.8 26.6 +/- 5.8 01 27.5 +/- 4.4 28.1 +/-4.5 23.4 +/- 4.7 27.9 +/- 6.2 01 21.0 +/- 5.6 18.5 +/- 4.0 20.4 +/- 4.0 22.8 +/- 3.9 20.3 +/- 4.0 23.6 +/- 10.5 15-C 34.4 +/- 5.3 14.9 +/- 3.5 22.4 +/- 4.0 29.5 +/- 7.1 15-C 29.1 +/- 5.3 27.3 +/- 4.4 19.8 +/- 4.2 23.1 +/- 5.3 15-C 23.1 +/- 5.2 20.4 +/- 3.7 22.9 +/- 3.9 19.3 +/- 3.5 18.5 +/- 3.7 23.4 +/- 10.3 02 31.8 +/- 4.9

.11.7 +/- 3.3 22.6 +/- 4.0 26.4 +/- 6.0 02 29.0 +/- 4.7 21.1 +/- 5.4 17.6 +/- 4.4 23.4 +/- 5.7 02 03 28.0 +/- 4.6 16.8 +E 3.4 22.4 +/- 3.9 26.2 +/- 5.7 03 04 30.7 +/- 5.0 12.1 +/- 3.4 21.8 +/- 4.0 28.8 +/- 6.2 04 10 31.7 +/- 4.8 13.1 +/- 3.3 25.0 +/- 4.0 28.7 +/- 6.0 10

. 11 32.3 +/- 5.1 16.0 +/- 3.6 24.6 +/- 4.1 28.2 +/- 6.3 11 31.6 +/- 4.6 33.0 +/- 4.9 27.7 +/- 4.5 32.3 +/- 4.9 A

24.6 +/- 4.5 24.5 +/- 4.7 22.6 +/- 4.4 22.5 +/- 4.7 16.6 +/-4.0 20.4+/-4.6 20.9+/-4.4 21.7+/-4.7 24.4 +/- 5.4 28.2 +/- 6.2 24.3 +/- 5.7 27.6 +/- 6.3 03 04 10 11 20.7 +/-5.5 17.8 +/-3.9 21.8 +/-4.2 21.7+/-4.0 20.5 +/- 4.1 22.0 +/- 9.8 27 31.7 +/- 5.0 14.3 +/- 3.4 25.7 +/- 4.2 27.8 +/- 6.0 27 30.2 +/- 4.7 24.6 +/- 4.6 17.4 +/- 4.3 19.7 +/- 5.4 27 21.5+/- 5.4 15.4 +/- 3.7 21.3 +/- 4.1 22.7 +/- 3.9 17.3 +/- 3.8 22.3 +/- 10.6 16.8 +/- 4.8 19.7 +/- 5.5 18.4 +/- 5.2 17.1 +/-3.6 18.5+/-4.0 21.2+/-3.9 22.2 +/- 3.8 24.1 +/- 4.3 22.9 +/- 4.0 19.4 +/- 3.5 19.6 +/- 3.8 24.0 +/- 3.8 19.8 +/- 3.7 17.6 +/- 4.0 18.1 +/- 3.8 24.6 +/- 5.9 22.6 +/- 4.3 17.8 +/- 4.1 23.1 +/- 4.0 19.4 +/- 4.1 22.0 +/- 9.2 23.0 +/- 11.4 23.0 +/- 9.4 24.1 +/- 9.7 3-22.

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 2, Air Particulate Gross Beta Radioactivity (le-3 pCi/m3)

Collection Date Locations APRIL 03/31 - 04/06 04/07 - 04/13 04/14 - 04/20 04/21 - 04/27 MAY 04/28 - 05/04 05/05 - 05/11 05/12 - 05/18 05/19 - 05/25 JUNE 05/26 - 06/01 06/02 - 06/08 06/09 - 06/15 06/16 - 06/22 06/23 - 06/29 Qtr Avg +/- 2 sd APRIL 03/31 - 04/06 04/07 - 04/13 04/14 - 04/20 04/21 - 04/27 MAY 04/28 - 05/04 05/05 - 05/11 05/12 - 05/18 05/19 - 05/25 JUNE 05/26 - 06/01 06/02 - 06/08 06/09 - 06/15 06/16 - 06/22 06/23 - 06/29 Qtr Avg +/- 2 sd 01 16.8+/-3.7 13.9 +/- 3.6 25.9 +/- 4.2 24.4 +/- 4.1 01 24.5 +/- 4.3 14.1 +/-3.9 14.6 +/- 3.7 10.4 +/- 3.4 01 17.8 +/- 3.7 21.1 +/-4.1 19.7 +/- 4.1 16.8 +/- 3.9 18.8 +/- 4.2 18.4 +/- 9.0 15-C 20.9 +/- 3.7 10.2 +/- 3.3 24.9 +/- 4.1 25.8 +/- 4.1 15-C 19.0 +/- 3.9 13.7 +/- 3.8 12.7 +/- 3.6 12.9 +/- 3.4 15-C 18.3 +/- 3.3 18.4 +/- 3.8 19.8 +/- 4.0 18.7 +/- 3.7 20.8 +/- 4.0 18.2 +/- 9.0 02 16.0 +/- 3.8 12.6 +/- 3.7 22.2 +/- 4.2 22.3 +/- 4.2 02 16.0 +/- 4.2 12.9 +/- 4.1 13.6 +/- 4.0 12.4 +/- 3.3 02 16.8 +/- 3.5 15.2 +/- 3.7 19.0 +/- 4.0 17.4 +/- 3.8 22.4 +/- 4.3 16.8 +/- 7.1 27 15.6 +/- 3.7 12.6 +/- 3.5 24.2 +/- 4.1 20.5 +/- 3.9 27 19.8 +/- 4.1 18.0 +/- 3.9 16.8 +/- 4.0 11.8 +/- 3.3 27 20.3 +/- 3.5 19.4 +/- 3.7 17.4 +/- 3.8 20.0 +/- 3.7 23.5 +/- 4.1 18.5 +/- 7.1 03 20.2 +/- 3.6 10.2 +/- 3.3 22.0 +/- 3.8 23.9 +/- 3.9

.03 19.8 +/- 3.9 13.9 +/- 3.8 14.4 +/- 3.6 12.5 +/- 3.2 03 16.0 +/- 3.4 21.0 +/- 3.8 18.6 +/- 3.9 16.8 +/- 3.6 20.8 +/- 4.0 17.7 +/- 7.9 04 18.4 +/- 3.9 12.7 +/- 3.6 28.6 +/- 4:4 24.6 +/- 4.2 04 18.8 +/- 4.2 13.5 +/- 4.1 16.8 +/- 4.0 13.4 +/- 3.4 04 21.6+/-3.6 16.9 +/- 3.6 21.3 +/- 3.9 18.5 +/- 3.7 21.7 +/-4.0 19.0 +/- 8.8 10 18.7 +/- 3.6 12.5 +/- 3.4 20.9 +/- 3.8 22.5 +/- 3.8 10' 20.0 +/- 3.9 17.4_+/-4.0 16.5 +/- 3.7 10.0 +/- 3.2 10 19.5 +/- 3.6 17.6 +/- 3.8 23.0 +/- 4.1 16.0 +/- 3.7 21.5 +/- 4.1 18.2 +/- 7.3 11 18.1 +/- 3.9 13.8 +/- 3.7 25.6 +/- 4.3 24.7 +/- 4.2 11 22.2 +/- 4.4 14.0 +/- 4.1 14.5 +/- 3.9 14.1 +/- 3.4 11 17.4 +/- 3.5 22.2 +/- 3.9 17.3 +/- 3.9 20.7 +/- 3.8 23.3 +/- 4.2 19.1 +/- 8.2 3-23

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 2, Air Particulate Gross Beta Radioactivity (le-3 pCi/m3)

Collection Date Locations JULY 06/30 - 07/06 07/07 - 07/13 07/14 - 07/20 07/21 - 07/27 AUGUST 07/28 - 08/03 08/04 - 08/10 08/11 - 08/17 08/18 - 08/24 08/25 - 08/31 SEPTEMBER 09/01 - 09/07 09/08 - 09/14 09/15 - 09/21 09/22 - 09/28 Qtr Avg +/- 2 sd JULY 06/30 - 07/06 07/07 - 07/13 07/14 - 07/20 07/21 - 07/27 AUGUST 07/28 - 08/03 08/04 - 08/10 08/11 - 08/17 08/18 - 08/24 08/25 - 08/31 SEPTEMBER 09/01 - 09/07 09/08 - 09/14 09/15 - 09/21 09/22 - 09/28 Qtr Avg +/- 2 sd 01 24.8 +/- 4.4 17.9 +/- 3.8 24.1 +/-3.5 18.9 +/- 4.1 01 21.5 +/-4.4 8.5 +/-3.7 20.8 +/-4.2 19.6 +/-4.2 15.0 +/-5.7 01 23.4 +/-4.1 8.8 +/-3.3 21.2+/-4.4 11.6+/- 3.5 18.2 +/- 10.7 15-C 20.9 +/- 3.8 17.7 +/- 3.4 26.2 +/- 4.1 21.7 +/- 3.7 15-C 19.5 +/- 3.7 11.0+/- 3.2 21.5 +/- 3.6 19.0 +/- 3.6 13.1 +/- 5.1 15-C 18.4 +/- 3.7 11.1+/-3.4 22.1 +/-4.3 12.1 +/- 3.4 18.0 +/- 9.2 02 18.5 +/- 4.0 16.4 +/- 3.7 23.6 +/- 3.4 14.7 +/- 3.9 02 16.4 +/- 4.0 10.4 +/- 3.6 24.3 +/- 4.2 16.6 +/- 3.9 14.5 +/- 5.9 02 18.5 +/- 4.1 11.7 +/- 3.7 14.9 +/- 4.4 11.2 +/- 3.7 16.3 +/- 8.2 27 19.4 +/- 3.8 15.5 +/- 3.5 23.1 +/- 4.3 15.2 +/- 3.7 27 21.8 +/- 4.1 11.2 +/- 3.5 20.0 +/- 3.8 17.6 +/- 3.7 18.2 +/- 5.8 27 17.7 +/- 3.8 12.0 +/- 3.5 19.9 +/- 4.4 11.0 +/- 3.4 17.1 +/- 7.6 03 04 10 11 23.8 +/- 4.1 21.6+/-4.0 22.5+/-4.1 21.9++/-4.0 17.0 +/- 3.6 24.1 +/-4.3 15.9 +/- 3.7 03 24.5 +/- 4.2.

11.7 +/- 3.5 21.8 +/- 3.9 21.2 +/- 3.9 9.8 +/- 5.3 03 20.5 +/- 4.1 13.5 +/- 3.7 20.2 +/- 4.5 7.9 +/- 3.4 16.8 +/- 3.5 26.4 +/- 4.4 16.7 +/- 3.7 04 26.2 + 4.2 9.0 +/- 3.3 21.0 +/- 3.8 15.9 _ 3.6 18.4 +/- 5.8 04 18.0 +/- 3.8 13.0 +/- 3.5 16.7 +/- 4.1 13.7 +/- 3.5 17.9 +/- 3.6 25.6 +/- 4.4 20.9,+/- 4.0 10 20.6 +/- 4.1 10.2 +/- 3.5 23.0 +/- 4.0 17.7 +/- 3.8 20.2 +/- 6.1 10 20.7 + 4.1 11.1 +/-3.5 19.0 +/- 4.4 11.5+/- 3.5 16.8 +/- 3.6 26.9 +/- 4.5 19.8 +/- 3.9 11 24.7 +/- 4.1 12.9 +/- 3.5 21.6 +/- 3.9 18.4 +/- 3.8 15.6 +/- 5.8 11 22.4 +/- 4.1 13.3 +/- 3.6 18.5 +/- 4.4 12.0 +/- 3.6 17.8 +/- 10.9 18.0 +/- 9.5 18.5 +/- 9.3 18.8 +/- 8.9 3-24

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 2, Air Particulate Gross Beta Radioactivity (le-3 pCilm3)

Collection Date Locations OCTOBER 09/29 - 10/05 10/06 - 10/12 10113-10/19 10/20 - 10/26 NOVEMBER 10/27 - 11/02 11/03-11/09 11/10- 11/16 11/17 - 11/23 11/24 - 11/30 DECEMBER 12/01 - 12/07 12/08 - 12/14 12/15 - 12/21 12/22 - 12/28 Qtr Avg + 2 sd Ann Avg +/- 2 sd OCTOBER 09/29 - 10/05 10/06 - 10/12 10/13 - 10/19 10/20 - 10/26 NOVEMBER 10/27 - 11/02 11/03 - 11/09 11/10- 11/16 11/17 - 11/23 11/24 - 11/30 DECEMBER 12/01 - 12/07 12/08 - 12/14 12/15 - 12/21 12/22 - 12/28 Qtr Avg +/- 2 sd Ann Avg +/- 2 sd 01 13.0 +/- 4.7 24.7 +/- 5.3 28.5 +/- 5.0 18.5+/-5.6 01 20.6 +/- 5.6 15.7 +/- 4.6 10.5 +/- 4.3 16.6 +/- 5.7 20.4 +/- 4.2 01 23.8 +/- 4.9 19.0 +/- 4.3 18.0 +/- 5.8 39.3 +/- 7.1 20.7 +/- 14.2 20.2 +/- 12.0 15-C 20.5 +/- 5.2 24.6 +/- 5.4 23.2 +/- 4.8 21.9+/- 5.9 15-C 23.9 +/- 6.0 17.1+/-4.7 12.2 +/-4.5 17.0 +/- 6.0 19.0 +/- 4.2 15-C 18.4 +/- 4.9 17.2 +/- 4.4 23.3 +/- 5.8 27.1 +/- 6.1 20.4 +/- 7.8 20.0 +/- 10.1 02 19.3 +/- 5.5 23.5 +/- 4.4 20.7 +/- 4.3 16.6 +/- 5.0 02 16.6 +/- 4.8 16.6 +/- 4.3 12.2 +/- 4.1 15.0 +/- 5.1 20.6 +/- 3.8 02 19.5 +/- 4.3 15.0 +/- 3.7 19.3 +/- 5.3 29.5 +/- 6.1 18.8 +/- 8.4 18.5 +/- 9.6 03 17.7 +/- 5.2 24.4 +/- 5.3 19.9 +/- 4.6 16.0 +/- 5.4 03 25.4 +/- 5.9 15.7 +/- 4.6 10.6 +/- 4.4 15.2 +/- 5.5 19.4 +/- 4.1 03 22.3 +/- 4.8 16.6 +/- 4.2 23.1 +/- 6.0 38.5 +/- 7.0 04 10 11 16.6 +/- 4.9 17.2 +/- 5.2 20.4 +/- 5.5 23.2 +/- 4.8 26.2 +/- 5.4 26.8 +/- 5.5 18.3 +/- 4.2 24.3 +/- 4.8 21.6 +/- 4.7 19.7 +/- 5.2 23.8 +/- 5.9 15.7 +/- 5.4 04 19.4 +/- 5.0 17.3 +/-4.4 13.5 +/- 4.3 17.0 +/- 5.4 23.1 +/- 4.1 04 20.8 +/- 4.5 18.9 +/- 4.1 19.6 +/- 5.6 22.0 +/- 5.9 10 17.7 +/- 5.3 15.3 +/- 4.4 14.9 +/- 4.6 8.0 +/- 5.0 20.4 +/- 4.1

,10 18.8 +/- 4.5 16.0 +/- 4.0 27.1 +/- 5.8 31.3 +/- 6.1 11 25.5 +/- 5.9 15.9 +/- 4.5 12.4 +/- 4.4 12.8 +/- 5.5 22.9 +/- 4.3 11 16.3 +/- 4.6 16.9 +/- 4.2 19.9 +/- 5.8 27.2 +/- 6.3 20.4 +/- 13.2 19.2 +/- 5.3 20.1 +/- 12.1 19.6 +/-9.7 19.5 +/- 11.1 19.8 +/- 9.8 19.9 +/- 10.4 20.4 +/-10.1 27 19.3 +/- 5.2 19.7 +/- 4.9 23.8 +/- 4.6 19.4 +/- 5.4 27 20.5 +/- 5.3 20.9 +/- 4.6 12.5 +/- 4.3 17.1 +/- 5.4 19.1 +/- 3.9 27 22.6 +/- 4.5 12.6 +/- 3.7 19.7 +/- 5.5 23.2 +/- 5.7 19.3 +/- 6.7 19.3 +/- 9.0 3-25

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 3, Airborne Iodine I-131(le-3 pCi/m3)

Collection Date Locations JANUARY 12/31 - 01/06 01/07 - 01/13 01/14 - 01/20 01/21 - 01/27 FEBRUARY 01/28 - 02/03 02/04 - 02/10 02/11 - 02/17 02/18 - 02/24 01

-1 +/- 15

-4 +/- 21 0+/-19

-2 +/- 21 01

-7 +/- 23

-8 +/- 15 28 +/- 27

-13 +/- 14 02 9_16 6 +/-22 9

25 24 03 20-+/- 15 4 -22 0 +/-21

-8 +/- 20

.02

-7 19 0 +/-17 11 21 0 _15 A

03

-9 +/- 23 5 +/- 16 0 +/- 21

-2+ 14 04

-6 +/- 15

-2 +/- 23 0 +/- 20 0 +/- 20 04 5 +/- 25

-9 +/- 17

-9 +/- 27

-2 +/- 15 04

-5 +/- 17 5 +/- 20 11 +/--24 2 +/-18

'17 +/- 21 10 3 +/- 12

-15 +/- 19 4 +/-22

-17 +/- 23 10

-2 +/- 23

-5 +/- 14 6 +/- 24 5+17 11 3 +/-14

-2 +/- 27

-16 +/- 27

-19 +/- 24 11 22 + 23

-11 +/- 18 14 +/-23

-4 17 MARCH 02/25 - 03/02 03/03 - 03/09 03/10 - 03/16 03/17 - 03/23 03/24 - 03/30 JANUARY 12/31 - 01/06 01/07 - 01/13 01/14 - 01/20 01/21 - 01/27 FEBRUARY 01/28 - 02/03 02/04 - 02/10 02/11 - 02/17 02/18 - 02/24 01 0+/-+17

-10 +/- 25 7 +/- 30 7 +/- 17 0 +/- 19 15-C

-6 17

-4 18

-2 + 22

-21 +/- 30 15-C 34 +/- 28 9 +/-19 4 +/-26 9 -15 02

-2 +/- 17

-5 +/- 21 5 +/- 30

-5 +/- 16 13 +/- 21 27 15 +/- 18 20 +/- 21 2 +/- 24

-17 +/- 23 27 2 +/- 25 3 +/- 17

-17 +/- 20

-28 +/- 18 03

-11 +/- 16

-9 + 20 16_+ 25 17 7 _14 10 7+11 5

25

-22 +/-28

-2 14 14,+/- 16 11 0 -17 5 -28

-8 +/- 27

-3 16 0 -17 MARCH 02/25 - 03/02 03/03 - 03/09 03/10 - 03/16 03/17 - 03/23 03/24 - 03/30 15-C

-2 +/- 14 18 +/- 19

-7 +/- 29 1 +/- 13 10 +/- 24 27 8 +/- 15 0 +/- 27 0 +/- 25 2 +/- 18

-18 +/- 28 3-26

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 3, Airborne Iodine I-131(le-3 pCi/m3)

Collection Date Locations APRIL 03/31 - 04/06 04/07 - 04/13 04/14 - 04/20 04/21 - 04/27 01.

0 +/- 23 2 +/- 17 5_ 15 11 +/- 19 02

-9 _ 23

-16 + 24

-5_+ 18

-14 _ 21 03

-8 +/- 21

-4 +/- 20

-3 +/- 15 0 +/- 21 04

-14 + 20

-1 +/- 17 2_ 19 24 10

-9 t 22 8 +/- 14

-10 +/- 13

-13 +/- 24 11 2 +/- 18 8! 18

-2!+/- 18 2! 21 MAY 04/28 - 05/04 05/05 - 05/11 05/12 -.05/18 05/19 - 05/25 JUNE 05/26 - 06/01 06/02 - 06/08 06/09 - 06/15 06/16 - 06/22 06/23 - 06/29 01 1 +30 10 13 3 -19

-7+/- 12 01 19 +/-15 3+/-11

-8 12

-18 + 27

-9 +/- 22 15-C

-6 +/- 18

-10 +/- 20 0 +/- 17

-13 +/- 20 02

-25 +/- 34

-6 +/-.17 6 +/-23

-2_+ 10 02 6 +/- 15

-6 +/- 13 3 +/- 13

-11 +/- 27 0 +/- 17 27 9 +/-22 4 +/-16 0 +/-18 0 +/-20 03 23 + 29 8+/- 13

-5 13 0+/-13 03 3+/-11 11 +/-10 6

13

-3 + 20

-2 14 04

-14 +/- 34 0+/-15

-6 +/- 20 7 -13 04 2 +/- 16 6 +/- 15 2 +/- 14

-24 +/- 23

-6 + 21 10

-4 +/- 22 4+/-12 6 +/-16 3 +13 10 14 15 0

12

-7 13

-3 +/- 22 0 +/-16 11 6 +34

-2 16

-10 t 17 11

-11 +/-13 +/- 13 4 +/-14 12 +/- 19 16 +/- 19 APRIL 03/31 - 04/06 04/07 - 04/13 04/14 - 04/20 04/21 - 04/27 MAY 04/28 - 05/04 05/05 - 05/11 05/12 - 05/18 05/19 - 05/25 JUNE 05/26 - 06/01 06/02 - 06/08 06/09 - 06/15 06/16 - 06/22 06/23 - 06/29 15-C 4-29

-11 +/- 14

-11 +/- 19 3 +/-15 15-C 14 +/- 16

-12 +/- 14 4 +/-14 18 + 21

-13 + 15 27

-19 +/- 28 3 +/- 15 0 +/- 20

-13 +/- 15 27 1 +/-14

-2+/- 11

-6_+/- 15

-8 +/- 18 4 +18 3-27

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 3, Airborne Iodine 1-131(le-3 pCi/m3)

Collection Date Locations JULY 06/30 - 07/06 07/07 - 07/13 07/14 - 07/20 07/21 - 07/27 AUGUST 07/28 - 08/03 08/04 - 08/10 08/11 - 08/17 08/18 - 08/24 08/25 - 08/31 SEPTEMBER 09/01 - 09/07 09/08 - 09/14 09/15 - 09/21 09/22 - 09/28 JULY 01

-18 +/- 26 27 +/- 24 19 +/- 17

-27 +/- 26 01 24 _ 30 3 -27 5 20

-6+/- 15, 1 +/- 16 01 1+/-8

-1 9

7 +13 0

17 15-C 3 +/- 21

-12 +/- 17 3 +/- 15

-15 +/- 22 15-C 10 +/- 19

-19 +/- 27

-1 +/- 17

-4 +/- 16

-8 +/- 14 15-C 4 +/- 10 9 14 + 13 10 _ 19 02

-3 +/- 23 8 +/- 24

-12 _ 12

-7 + 28 02

-6 +/- 29

-6 +/- 23 11 +/- 18 15 +/- 22

-7 +/- 19 02 8 +/- 10 5 +/- 10

-1 _+13

.1 _ 16 27

-4 +/- 25

-6 +/- 25 3 +/- 16 12 +/- 21 27

-8 +/- 28

-3 +/- 23

-8 +/- 19 5 +/- 17

-13 +/- 15 27 1 +/- 10 0 +/- 10 4 +/- 18 4 +/- 18 03 3 +/- 19

-10 + 18

-2_+ 17 16 +/-22 03

-17 +/- 22

-9 +/- 26

-17 +/- 18

-3 +/-.18 5 +/- 14 03

-6 _11

-6 12 7+/-13 6

16 04

-20 +/- 23

-26 +/- 24

-7 +/- 15

-2 +/- 22 04 32_+/- 24 12 +22 0 +/- 18 6 +/- 19 5 +/- 17 10 6 +/- 23 0 +/-_24 10 +/-19 2 _24 10

-11 +/- 24 12 +/- 27 11 +/-14 4 +/-17 2+/-17 04 4 +/- 10

-3+ 9 6 +'14 6+-18 10

-3 +/- 9 1 +/- 11 9 _12

-8 +/- 20 11

-3 17 3 +/-18

-4+/- 13

-7 +/- 24 11

-11 +/--25

-15 +/- 24

-3 17

-8 +/- 13

-1 _ 14 11

-13 +/- 14 4+/-9 0

14 10 18 06/30 - 07/06 07/07 - 07/13 07/14 - 07/20 07/21 - 07/27 AUGUST 07/28 - 08/03 08/04 - 08/10 08/11 - 08/17 08/18 - 08/24 08/25 - 08/31 SEPTEMBER 09/01 - 09/07 09/08 - 09/14 09/15 - 09/21 09/22 - 09/28 3-28

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 3, Airborne Iodine 1-131(le-3 pCi/m3)

Collection Date Locations OCTOBER 09/29 - 10/05 10/06 - 10i12 10/13 - 10/19 10/20 - 10/26 NOVEMBER 10/27 - 11/02 11/03 - 11/09 11/10 - 11/16 11/17 - 11/23 11/24 - 11/30 DECEMBER 12/01 - 12/07 12/08 - 12/14 12/15 - 12/21 12/22 - 12/28 OCTOBER 09/29 - 10/05 10/06-10/12 10/13 - 10/19 10/20 - 10/26 NOVEMBER 10/27 - 11/02 11/03 - 11/09 11/10 - 11/16 11/17-11/23 11/24 - 11/30 DECEMBER 12/01 - 12/07 12/08 - 12/14 12/15 - 12/21 12/22 - 12/28 01

-2 +/- 18 10 +/- 13 6 +/- 13 0 +/- 17 01

-2_+ 15 3 -28

-4 _ 12

-7 18 3 -16 01 2

15 3+/-9

-4 _ 21 1 _12 15-C 8 _25 13 +/-20 3

14 8 _17 15-C 6 +/- 17 6 +/- 26

-3 +/- 18 13 +/- 16

-6 +/- 16 15-C

-5 +/- 16

-1 +/- 12 +18 13 - 10 02

-11 +/-26 8

10 12+/-11 9-17 02 7 +/- 13 3 +/- 20 0+/-11 17 -17

-3_+/- 16 02

-6 +/- 13 6 +/- 13

-10 17

-1 _+11 27

-1 +/- 27 10 +/- 16 3 +/- 16

-5 +/- 17 27 0 _16 29 +/- 25 4 -16

-8_+ 18

-10 _ 18 27

-4 18 9 -14 5 _17 5 _13 03

-6 +/- 20

-7 +/- 10 2

15 4

17 03 8 +/- 14

-14 + 26

-7 14

-2++/- 18

-15 _ 18 03 6 +/- 19 5 +/- 14 2 +/- 16 10 +/- 13 04

-16 +/- 18 0 +/-13 4+/-11 +/- 17 04 5 +/- 18 8 +/- 24 3 +/- 13 0 +/- 16 9-+/-16 04

-4 13 6 +/-14 3 +/-22

-9 14 10 10 +/- 17 3 +/-15 12 +/- 15 0 +/-18 10

-1 +/- 16 10 +/- 29 3-9 4+/-16 0

19 10 2

18

-7 +/-11

-20 +/- 17

-9 +/-11 11 11 +/- 17

-6_+ 14

-1 +/- 15 4 +/-22 11 15 +/- 16

-5 +/- 24

-12 +/- 13

-16 +/- 18 15 +/-18 11 10 +/- 19 2

15 1 15

-10 +/- 14 3-29

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 4-A, Air Particulates Gamma Spectra - Quarter 1 (le-3 pCi/m3)

Isotope Location 01 02 03 04 10 II 15-C 27 01 02 03 04 t0 I I 15-C 27 Ba-140 18.0 +/- 27.0 13.0+/- 19.0

-4.0 +/- 25.0 4.0+/- 19.0

-8.0 +/- 27.0 13.0 +/- 23.0 4.0 +/- 24.0 4.0 +/- 14.0 Cs-134 0.3+ 1.0

-0.3 +/- 0.9 0.2 +/- 0.8 0.0 +/- 0.9 0.1+/-0.5 0.1 0.9 0.6 +/- 0.7 0.2+/- 0.8 Be-7 131.0 +/- 42.0 95.0 +/-: 31.0 112.0 +/- 28.0 135.0 +/- 31.0 133.0 +/- 31.0 149.0 +/- 36.0 99.0 +/- 30.0 81.0+/- 28.0 Cs-137 0.3 +/- 1.0

-0.1 +/-0.9 0.1 +/-0.6

-0.1 +/- 0.9

-0.7 +/- 0.6

-0.3 +/- 0.8 0.0 +/- 0.8 0.2+/- 0.8 Ce-141

-0.9 4.7 1.8 3.9

-0.4 3.5 2.8 4.2

-0.2 2.5

-1.4+/-4.6

-1.9 4.0

-1.3 3.8 Mn-54

-0.4 +/- 1.0 0.4 +/- 1.0

-0.2 M0.

0.1+0.7 0.9 0.8 0.8 0.9 0.4 0.7 0.7 1.0 Ce-144

-1.1 +/-5.1 1.0 4.1

-0.1 3.5 1.3 4.1

-0.6 2.1

-0.7 3.8 1.6+/- 3,8

-3.3 +/- 3.9 Nb-95 1.8 3.3

-0.7 2.4

-2.2+/- 1.8

-2.1 2.9 0.6 2.9 2.1 2.9

-1.9 2.6

-2.0 2.3 Co-58

-0.1 +/- 1.6 0.4+/- 1.5 0.2 10.9

-0.5+/- 1.5

-0.1 +/- 1.2 0.0+/- 1.5 0.5 +/- 1.3

-0.4+/- 1.0 Ru-103 1.0 +/- 2.9 1.0 +/- 2.4 0.9 +/-1.7

-1.0 +/- 2.1

-1.1 +/-2.1 1.0+/-2.5 1.4+/-2.0 0.0 +/- 2.2 Co-60 0.6+/- 1.0 0.1+/-0.5 1.0+/- 1.0

-0.1 +/-0.9

-0.2 0.7 0.3 0.9 0.1 +/-0.7

-0.5 0.7 Ru-106 4.0+/- 11.0

-0.4 8.4

-0.5 +8.0

-6.1 +8.1 2.8+/- 5.5 1.0 11.0

-0.7 +/- 5.8 3.9 +/- 9.0 Cr-51

-7.0+/- 31.0 15.0 +/- 30.0 0.0:+/- 28.0 24.0 33.0 9.0 22.0 22.0 31.0

-2.0 34.0

-5.0 30.0 Zr-95 1.9+/- 3.5 1.3 +/- 2.6 2.4 +/- 2.4

-0.9 2.9 1.5 2.4 0.0 2.6

-1.3 2.4 1.4 2.9 3-30

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 4-B, Air Particulates Gamma Spectra - Quarter 2 (le-3 pCi/m3)

Isotope Location 01 02 03 04 t0 11 15-C 27 01 02 03 04 10 11 15-C 27 Ba-140 42.0 +/- 48.0

-43.0 +/- 49.0 16.0 +/- 33.0

-43.0 +/- 50.0 40.0 +/- 59.0 42.0 +/- 74.0

-8.0 +/- 17.0

-26.0 :E 58.0 Cs-134 0.3 +/- 0.4

-0.5 +/- 0.6 0.4 +/- 0.5-

-0.3 +/- 0.6

-0.1 +/-0.4 0.4 +/- 0.5

-0.2 +/- 0.5

-0.2 +/- 0.5 Be-7 126.0 +/- 36.0 141.0 +/- 39.0 114.0 +/- 29.0 96.0 +/- 33.0 116.0+/-32.0 145.0 +/- 39.0 122.0+/- 32.0 122.0 +/- 37.0 Cs-137

-0.5 +/- 0.6

-0.9 +/- 1.0

-0.8 +/- 0.5 0.0 +/-0.5 0.1 +/-0.6 0.3 +/-0.8

-0.2 +/- 0.5

-0.3 +/- 0.7 Ce-141

-1.1 +/-2.8 2.0 +/-3.1

-1:2 +/-2.9

-1.2 +/-3.2 0.3 +/-2.6

-1.2+/-3.1

-3.6+/- 2.9 0.2 +/- 3.6 Mn-54 0.4 +/-0.7 0.3 +/- 1.0

-0.3+/-0.7

-0.1+/-0.8

-0.7 +/- 0.7

-0.1 +/-0.8

-0.2 +/- 0.7

-0.4 +/- 0.8 Ce-I 44 0.2 +/- 2.4

-0.8 +/- 2.7

-1.4+/- 2.5

-3.2+/- 3.2 0.1+/-2.4 0.7 +/- 3.2

-0.7 +/- 2.7

-1.1 +/- 3.0 Nb-95 0.4 +/- 2.8 1.9 +/- 2.7

-1.9 +/- 3.1

-1.1 +/-4.0

-0.9 +/-3.3

-0.9 +/-2.7

-1.5 3.4

-1.7 +/-3.0 Co-58

-0.4+/- 1.4 0.4+/- 1.3

-0.9+/- 1.2

-0.8+/- 1.5

-0.4+/- 1.3 0.7 +/- 1.4 0.7+/- 1.3 1.2+/- 1.6 Ru-103 0.0+/- 1.8 0.8 +/- 3.0 0.4:+/- 2.3 0.4 +/-2.5 0.3+/- 1.8 0.4:2.9 2.3 +/- 2.5 0.0 +/- 2.0 Co-60 0.0 +/- 0.6 0.0 +/- 0.7 0.0 +/- 0.4 0.2+/- 0.9 0.6t 0.7 0.6+/- 1.0

-0.5 +/-0.8

-0.1 i 1.0 Ru-106 5.6 +/- 6,7

-1.7+/- 5.7 0.9+5.5

-1.3+/- 7.7 1.1 +/-5.6

-4.2 +/- 5.8

-0.9 +/-6.1 0.0 +/- 7.1 Cr-51

-20.0 +/- 25.0

-27.0 +/- 35.0

-5.0 +/- 32.0

-7.0 +/- 27.0

-19.0 +/- 26.0 8.0+/- 30.0 22.0 +/-23.0

-10.0+/- 28.0 Zr-95

-0.1 +/- 1.6 0.6+/- 1.8 0.7 +/- 2.9

-1.2+/- 4.3

-0.2 +/- 2.6 0.1+/-2.0

-1.0 +/- 2.6

-0.3 +/- 3.1 3-31

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 4-C, Air Particulates Gamma Spectra - Quarter 3 (le-3 pCi/m3)

Isotope Location 01 02 03 04 10 11 15-C 27 01 02 03 04 10 11 15-C 27 Ba-1 40 0,0+/- 11.0

-8.0+/- 19.0

-7.0+/- 10.0

-3.0+/- 18.0 0.0+/-0.0 7.0+/- 15.0

-4.3 +/-6.1 0.0+/- 11.0 Cs-134

-0.4 +/- 0.6

-0.1 +/- 0.7 0.0 +/- 0.5

-0.1+/-0.6

-0.1 +/-0.5

-0.1 +/- 0.4

-0.5 +/- 0.5 Be-7 114.0 +/-29.0 77.0 26.0 100.0 22.0 104.0 +/- 28.0 129.0 +/- 31.0 111.0 +/- 29.0 95.0 21.0 124.0 31.0 Cs-137 0.21 0.5

-0.2 +/- 0.8

-0.4 +/- 0.6

-0.4 +/- 0.6 0.5 +/- 0.7

-0.2 +/- 0.9 0.2 +/- 0.5

-0.4 +/- 0.7 Ce-141

-0.9+/- 1.6

-0.2 +/- 2.2

-I.0 +/- 2.0

-1.1 +/- 1.7

-0.9 +/-2.0

-1.1+/-2.0 0.7 +/- 1.9 1.6 +/- 2.6 Mn-54

-0.6 +/- 0.8

-0.1 +/-0.8

-0.5 +/- 0.7 0.3 +/- 0.7 0.7 0.9 0.2 +/-0.6 0.2 +/-0.6 0.3 0.5 Ce-144 1.9+/- 2.4 1.3+/-2.6

-2.3 +/- 3.1 1.2+/- 3.2 0.5 +/- 2.4

-1.0 +/- 2.7

-0.5 +/- 2.4

-0.6 +/- 3.2 Nb-95

-0.3+/- 1.6 0.9 +/- 2.1 0.5 +/-1.8 1.9 +/- 2.6 0.5+/- 1.0

-1.2+/- 1.6

-0.5+/- 1.9 1.4 3.1 Co-58 0.2+/- 1.1

-0.6 1.1

-0.3 1.1 0.4+/- 1.3 0.4 1.2 0.3+/-1.0 0.1+/- 0.9

-0.4+/- 1.3 Ru-103 0.7+/-1.5 0.0+/- 1.0 0.0+/- 1.2

-0.3 t.7 0.5 1.6

-1.2 1.3

-0.7 1.4 1.3 +/-2.1 Co-60

-0.1 +/-0.9

-0.3 1.2

-0.5 0.5 0.2 +/-0.5 0.6+/- 1.0

-0.2 +/- 0.5

-0.5 +/- 0.8

-0.3 +/- 0.5 Ru-106

-1.1+/-4.9

-7.1 4 8.4

-1.5+/- 5.4 0.0 +/- 5.8

-2.1 : 6.0

-3.4 +/- 8.2 1.6 +/- 4.9

-2.4 +/- 6.8 Cr-51 9.0 18.0

-4.0 +/-21.0

-5.0+/- 18.0

-12.0+/- 19.0

-6.0 16.0 14.0 18.0

-8.0 17.0

-1.0+/- 18.0 Zr-95 1.1+/-2.3 0.6 +/- 2.1 0.5+/- 1.9

-1.3 +/- 2.8

-0.7+/- 2.3

-2.0 +/- 2.3 0.5+/- 1.4 0.3 +/- 2.2 3-32

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Repor 2008 Table 4-D, Air Particulates Gamma Spectra - Quarter 4 (le-3 pCi/m3)

Isotope Location 01 02 03 04 10 II 15-C 27 01 02 03 04 10 II 15-C 27 Ba-140

-1.0+ 14.0 0.0+/-8.4

-10.3 +/- 9.2 0.4+/- 9.9 2.9 +/- 5.7 0.0 +/- 8.4 3.8 +/- 9.2

-2.0+/- 16.0 Cs-134 0.1 +/-0.6 0.3:+/- 0.5 0.1+/-0.5 0.3 +/- 0.5

-0.3 +/- 0.5 0.1 +/-0.7 0.6+/- 0.5 0.1 +/-0.4 Be-7 78.0 +/- 26.0 87.0 +/- 26.0 62.0 20.0 110.0+/-31.0 100.0+/-28.0 95.0+/- 28.0 96.0-+/-24.0 58.0 +/- 23.0 Cs-137

-0.4 : 0.7 0.0 +/-,0.5 0.0 +/- 0.7 0.6 +/- 0.9

-0.2 +/- 0.8

-0.2 +/- 0.6 0.1 +/-0.6

-0.1 +/- 0.5 Ce-141 0.1 +/- 1.4 0.8+/- 1.8 0.8+/- 1.9

-1.0+/- 2.1

-0.7 +/-1.5 0.2 1.9

-2.0 1.7 0.9 2.1 Mn-54 0.810.9 0.0+/-1.0

-0.1 0.7

-0.7 1.1 0.1+/-0.8 0.89 0.9 0.4 0.6

-0.4 +/-0.7 Ce-1 44 0.2 +/- 2.8 2.9 +/- 2.9

-0.1+/-2.8

-1.3+/- 2.8 0.0 2.5 1.1 +/-2.6 0.2 2.3

-0.8 2.7 Nb-95 0.1 +/- 1.4 0.1 +/- 1.6 0.4 +/- 2.0 1.2 +/- 2.0

-1.1 +/- 1.4

-0.7 +/-2.1 0.6 +/- 2.0 1.3 +/- 2.5 Co-58 1.0d:1.8 0.31-0.9

-0.2 1.0

-0.6+/- 0.9

-0.2+/-0.9 0.3+/- 1.3

-0.6 1.1

-1.3 1.8 Ru-103

-0.2+/-1.8 0.9+ 1.1 0.4+/-1.5 1.1 +/- 1.7 1.7+/- 1.5

-1.3 +/- 1.4

-0.1 +/- 1.7 0.2+/- 1.5 Co-60

-0.7 +/-0.8

-0.5 +/- 0.7 0.3+/- 1.0 0.3 +/- 0.5

-0.8 +/- 0.8

-0.8+/- 1.2 0.4 +/- 0.7

-0.3 +/- 0.5 Ru-106

-0.6 +/- 6.3

-0.9 +/- 7.5

-5.5 6.8

-5.3 +/-6.5

-3.6 +/-4.2 3.8 7.3

-0.9 +/-6.3

-2.4 +/-5.8 Cr-SI

-8.0+/- 16.0 4.0 16(0

-11.0+/- 17.0

-5.0 16.0 3.0: 14.0 2.0+/- 17.0 1.0+/- 14.0 2.0+/- 18.0 Zr-95 0.5-1.4

-0.6+/- 14 0.9+/- 1.8 1.8 2.4 0.3 +/-2.4 0.6 2.2 1.6+/- 2.3

-1.1+/-2.3 3-33

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological. Environmental Operating.Report 2008 Table 6, Soil (pCi/g)

Collection Location Date Isotope 03 07/16/08 07/16/08 07/16/08 04 07/16/08 07/16/08 07/16/08 Be-7

-0.30 +/- 0.64 Cs-134 0.00 +/- 0.05 Ru-103 0.02 +/- 0.07 Be-7

-0.18 +/- 0.41 Cs-134 0.05 +/- 0.06 Ru-103 0.01 +/- 0.05 Be-7

-0.09 :t 0.53 Cs-134 0.01 +/- 0.05 Ru-103 Ce-141

-0.06 +/- 0.09 Cs-137 0.59 +/- 0.14 Ru-106 0.14 +/- 0.47 Ce-141 0.02 +/- 0.08 Cs-137 0.49 +/-0.10 Ru-106 0.18 +/- 0.42 Ce-141 0.00 +/- 0.08 Cs-137 1.14 +/- 0.15 Ru-106 Ce-144

-0.14 +/- 0.30 Fe-59 0.07 +/-0.16 Sb-125

-0.10 +/- 0.16 Ce-144

-0.11 +/- 0.27 Fe-59 0.07 +/- 0.12 Sb-125

-0.03 +/- 0.12 Ce-144 0.10+/- 0.26 Fe-59

-0.09 +/- 0.12 Sb-125 Co-58

-0.04 +/- 0.07 K-40 10.20 +/- 2.40 Th-228 0.70 +/- 0.35 Co-58 0.02 +/- 0.04 K-40 12.10 +/- 1.60 Th-228 1.10+/- 0.22 Co-58 0.03 +/- 0.06 K-40 10.30+/- 1.70 Th-228 Co-60 0.04 +/- 0.06 Mn-54

-0.02 +/- 0.07 Zn-65

-0.15 +/- 0.14 Co-60 0.01 +/- 0.04 Mn-54 0.04 +/- 0.05 Zn-65 0.16+/- 0.20 Co-60 0.05 +/- 0.06 Mn-54

-0.02 +/- 0.05 Zn-65 Cr-51 0.08 +/- 0.63 Nb-95

-0.04 +/- 0.07 Zr-95

-0.05 +/- 0.10 Cr-51 0.00 +/- 0.49 Nb-95 0.02 +/- 0.06 Zr-95 0.00 +/- 0.08 Cr-51 0.41 +/- 0.49 Nb-95

-0.01 +/- 0.07 Zr-95 14-C 07/16/08 07/16/08 07/16/08 0.03 +/- 0.06

-0.24 +/- 0.44 0.13+/-0.15 1.17+/-0.26

-0.18+/-0.27 0.02+/-0.10 3-34

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 8, Goat Milk (pCi/L)

Collection Location Date Isotope 21 04/23/08 05/07/08 06/11/08 06/26/08 07/09/08 07/23/08 08/06/08 08/20/08 06/26/08 08/20/08 Ba-140 0.50 + 5.70 1.10 +/- 5.70 -

1.50 +/- 4.60 3.30 +/- 6.40 4.50 +/- 8.30

-1.10+/- 7.30

-2.40 +/- 7.60 2.90 +/- 7.90 Cs-134

-0.40 +/- 2.60 0.10+/- 1.00 1.60 +/- 3.60

- 1.90 +/-2.80 1.10+/- 3.56 1.00 +/- 2.40 2.00 +/- 2.50 2.20 +/- 3.60 Cs-137 0.20 +/-3.70 2.50+/- 1.50 6.,50+/- 5.00 1.30 +/- 2.90

-0.40 +/- 4.30 3.90 +/- 3.40 2.60 +/- 3.60 5.30 +/- 5.40 1-131

-0.13 +/-0.05 0.10 +/-0.30

-0.14 +/-0.04

-0.14 +/-0.04 0.19 +/-0.44 0.01 +/- 0.24

-0.15 +/- 0.06

-0.16 +/-0.21 K-40 1450.00+/- 140.00 1168.00 55.00 1300.00+/- 120.00 1192.00 + 91.00 1090.00 +/- 160.00 728.00 +/- 98.00 850.00 110.00 1060.00+/- 150.00 La-140 0.50 +/- 5.70 1.10+/- 5.70

- 1,50 : 4.60 3.30 +/- 6.40 4.50 +/- 8.30

-1.10+/- 7.30

-2.40 +/- 7.60 2.90 + 7.90 Sr-89 Sr-90 2.70+/-5.80 1.80+/- 1.10 1.60 +/- 4.70 1.20 +/- 1.00 24-C 06/11/08 07/23/08 08/06/08 08/20/08 Ba-140 B

-4.30 +/- 7.40

-0.10 +/- 6.90:

4.20 +/- 8.00 Cs-134 Cs-137 1-131 K-40 La-140

-1.10+/- 2.30

-3.40 +/- 3.00 2.40 +/- 3.30 4.90 E 3.70 5.90 +/- 5.10 7.40 +/- 6.10 0.01 +/- 0.22

-0.15+/- 0.06

-0.01 +/-0.19 1720.00 k 140.00 1580.00 +/- 140.00 1650.00 +/- 190.00

-4.30 +/- 7.40

-0.10 +/- 6.90 4.20 +/- 8.00 Sr-89

. Sr-90 08/20/08 5:30 +/- 4.90 0.44 +/- 0.75 3-35

Dominion Nuclear Connecticut,.Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 9, Pasture Grass (pCi/g)

Collection Location Date Isotope 21 Ba-140 Be-7 Ce-141 Ce-144 Co-58 Co-60 01/16/08 02/20/08 03/19/08 04/09/08 04/23/08 05/21/08 08/20/08 09/10/08 09/24/08 10/08/08 10/22/08 11/19/08 12/10/08 01/16/08 02/20/08 03/19/08 04/09/08 04/23/08 05/21/08 08/20/08 09/10/08 09/24/08 10/08/08 10/22/08 11/19/08 12/10/08 01/16/08 02/20/08 03/19/08 04/09/08 04/23/08 05/21/08 08/20/08 09/10/08

.09/24/08 10/08/08 10/22/08 11/19/08 12/10/08 01/16/08 02/20/08 03/19/08 04/09/08 04/23/08 05/21/08 08/20/08 09/10/08 09/24/08

-0.001 +/- 0.039 D 0.025 +/- 0.062 D

-0.008 +/- 0.052 D

-0.078 +/- 0.086 D 0.013 +/- 0.039 D

-0.052 +/- 0.043 0.022 +/- 0.068

-0.044 +/- 0.062

-0.020 +/- 0.023

-0.010 +/- 0.024

-0.001+/- 0.041

-0.010 +/-0.033 D 0.009 +/-0.061 D Cr-51 0.000 +/- 0.190 0.250 +/- 0.210 0.060 +/- 0.220

-0.160 +/- 0.230

-0.070+/- 0.170 0.030 +/- 0.140

-0.110+/-+0.240

-0.050 +/- 0.190

-0.290 +/- 0.180 0.040 +/- 0.100

-0.060 +/- 0.150 0.010:+/- 0.140

-0.180 +/- 0.230 La-140

-0.001 +/- 0.039 0.025 +/- 0.062

-0.008 +/- 0.052

-0.078 +/- 0.086 0.013 +/-0.039

-0.052 +/- 0.043 0.022 +/- 0.068

-0.044 +/- 0.062

-0.020 +/- 0.023

-0.010 +/- 0.024

-0.001 +/- 0.041

-0.010 +/- 0.033 0.009 +/- 0.061 Th-228 0.120 +/- 0.120 0.000 +/- 0.120 0.090 +/- 0.110 0.020 +/- 0.160 0.000 +/- 0. 110 0.033 +/- 0.079 0.120 + 0.130 0.040 +/- 0.110 0.194 +/- 0.082 0.320 +/-0.250 0.001 +/- 0.034 0.030 +/-0.100

-0.014 +/- 0.024 0.070 +/- 0.230 0.010 +/- 0.038

-0.019 +/- 0.096 -

-0.009 +/- 0.032 0.150+/-0.200

-0.004+/-0.037 0.030+/-0.100 0.011 +/-0.025 0.060 +/- 0.250

-0.040 +/- 0.040 0.058 +/- 0.095

-0.013 +/- 0.033 0.190 +/-0.160

-0.005 +/- 0.029

-0.118 +/- 0.084

-0.008 +/- 0.020 0.250 + 0.210 0.003 +/- 0.022 0.028 +/- 0.076 0.016 +/- 0.021 0.880 -0.440 0.007 +/- 0.039 0.090 +/- 0.140 0.012 +/- 0.038 0.380 +/-0.360 0.007 +/- 0.035

-0.001 +/- 0.093 0.016 +/- 0.030 0.630 +/- 0.250

-0.001 +/- 0.023 0.044 +/- 0.079 0.001 +/- 0.018 1.310 +/-0.270 0.002 +/- 0.016 0.004 +/- 0.051

-0.010 +/- 0.015 1.120 +/- 0.290

-0.006 +/- 0.023

-0.046 +/- 0.075 0.009 +/- 0.020 0.040 +/- 0.140 10.019 +/- 0.025

-0.094 +/- 0.086

-0.005 +/- 0.018 -

-0.070 +/- 0.200

-0.009 +/- 0.031 0.010 +/- 0.100 0.018 +/- 0.027 Cs-134 Cs-137 Fe-59 1-131

-0.011 +/- 0.026 -

0.027 +/- 0.023

-0.058 +/- 0.057 -

-0.048 +/- 0.041

-0.004 +/- 0.021

-0.014 +/- 0.030 0.027 +/- 0.075 0.010 +/- 0.045 0.007 +/- 0.018 0.017 +/- 0.023 0.013 +/- 0.059

-0.022 +/- 0.061

-0.011 +/- 0.022 0.042 +/- 0.030

-0.044 +/- 0.072 0.021 +/-:0.080 0.014 +/- 0.019

.0.013 +/- 0.023

-0.006 +/- 0.052 0.008 +/- 0.035 0.008 +/- 0.020

-0.013 +/- 0.019 -

-0.014 +/- 0.049 -

0.002 +/- 0.009

-0.006 +/- 0.024 0.004 +/- 0.030 0.082 +/- 0.086

-0.009 +/- 0.003 0.011 +/- 0.021 0.006 +/- 0.014 0.023 +/- 0.057

-0.003 +/- 0.001

-0.002 +/- 0.014

-0.013 +/- 0:020

-0.019 +/- 0.044 0.003 +/- 0.019 0.000 +/- 0.011 0.004 +/- 0.014 0.000 +/- 0.038 0.003 +/- 0.014 0.002 +/- 0.014 0.023 +/- 0.022 0.005 +/- 0.048 0.004 +/- 0.014 0.006 +/- 0.011 0.007 +/- 0.018 0.008 +/-0.038 0.017 +/-0.040 0.032 +/-0.023 0.032 +/- 0.029 0.014 +/- 0.062

-0.0 12 +/- 0.062 Mn-54 Nb-95 Ru-103 Ru-106

-0.003 +/- 0.024 -

0.006 +/- 0.027 0.010 +/- 0.025 0.010 +/- 0.220 0.015 +/- 0.030 0.005 +/- 0.036 0.006 +/- 0.029 0.050 +/- 0.220

-0.007 +/- 0.023 0.031 +/- 0.044 0.020 +/- 0.025 0.000 +/- 0.220 0.010 +/- 0.030 0.049 +/- 0.040

-0.014 +/- 0.032 -

0.130 +/- 0.250 0.014 +/- 0.020

-0.003 +/- 0.022 0.001 +/- 0.019 0.150 +/- 0.190

-0.008 +/- 0.020

-0.022 +/- 0.027

-0.006 +/- 0.018 -

0.120 +/- 0.140 0.008 +/- 0.025 0.017 +/- 0.039 0.009 +/- 0.029

-0.040 +/- 0.270

-0.006 +/- 0.014 0.004 +/- 0.036 0.011 +/- 0.028 0.120 +/- 0.240 0.000 +/- 0.017 0.002 +/- 0.025 0.010 +/- 0.018

-0.030 +/- 0.170 0.003 +/-0.013

-0.005 0.018 0.006 +/- 0.014 0.030 +/- 0.150 0.008 +/- 0.015

-0.013 +/- 0.023 -

-0.022 +/- 0.021 -

-0.030 +/- 0.180 -

0.008 +/- 0.018 0.002 +/- 0.019 0.005 +/- 0.020 0.040 +/- 0.150

-0.005 +/- 0.026 0.011 +/- 0.028 0.005 +/- 0.028 0.070 +/- 0.240 Zn-65 Zr-95 0.030 +/- 0.110 0.033 +/- 0.042 0.021 +/- 0.077 0.038 +/- 0.054 0.015 +/-,0.083

-0.005 +/- 0.045

-0.093 +/- 0.075 -

-0.023 +/- 0.057 0.007 +/- 0.052 0.009 +/- 0.038 0.092 +/- 0.080

-0.004 +/- 0.037 0.025 +/- 0.080 0.003 +/- 0.059 0.010 +/- 0.060

-0.001 +/-0.051

-0.031 +/- 0.048

-0.015 +/- 0.032 0.017 +/- 0.026 0.015 +/- 0.035 0.001 +/- 0.025 0.021 +/- 0.034 0.005 +/- 0.025 0.012 +/- 0.020

-0.026 +/- 0.036 0.040 +/- 0.030 0.000 +/- 0.024

-0.005 +/- 0.021 0.014 +/- 0.018 0.011 +/- 0.017 0.002 +/- 0.034 K-40 24.400 +/- 0.940 12.800+/- 1.100 13.420 +/- 0.760 8.340 +/- 0.930 10.700 +/- 0.790 4.890 +/- 0.780 5.000+/- 1.300 2.800 +/- 0.930 3.930 +/- 0.680 3.650 +/-0.710 4.210 +/- 0.800 9.380 +/- 0.750 6.260 +/- 0.820 Sb-125

-0.054 +/- 0.057

-0.014 +/- 0.067 0.012 +/- 0.054 0.050 +/- 0.068 0.021 +/- 0.049

-0.012 +/- 0.044 0.009 +/- 0.067 0.041 +/- 0.054

-0.015 +/- 0.046 0.035 +/- 0.040 0.000 +/- 0.045

-0.011 +/- 0.042

-0.016 +/- 0.063 3-36

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 9, Pasture Grass (pCi/g)

Collection Location Date Isotope 21 10/08/08 10/22/08 11/19/08 12/10/08 01/16/08 02/20/08 03/19/08 Th-228 0.047 +/- 0.067 0.052 E 0.076

-0.032 +/- 0.070

-0.050 +/- 0.120 Ba-140

-0.023 +/- 0.046 0.013 + 0.081 C

22 Cr-51 01/1 6/08

-0.010 +/- 0.220 02/20/08

-0.120 + 0.290 La-140 01/16/08

-0.023 + 0.046 02/20/08 0.013 +/- 0.081 Th-228 01/16/08 0.040+/- 0.130 02/20/08 0.050 +/- 0.170 Ba-140 Zn-65 0.000 +/- 0.038 0.000 +/- 0.048

-0.047 +/- 0.048 0.000 +/- 0.058 Be-7

-0.130 +/- 0.210

-0.060 +/- 0.280 Cs-134

-0.010 +/- 0.025 0.002 +/- 0.026 Mn-54

-0.024 +/- 0.023

-0.018 0.031 Zn-65

-0.020 +/- 0.100

-0.120 +/- 0.080 Be-7 0.160 +/- 0.190 0.190 +/- 0.160 0.290 +/- 0.220

-0.050 +/- 0.230 0.690 +/- 0.230 0.450 +/- 0.280 0.540 +/- 0.240 0.640 +/- 0.350 0.350 +/- 0.330 0.830 +/- 0.300 0.460 +/- 0.210 0.340 +/- 0.220 1.090+/- 0.150 1.460 +/- 0.310 5.340 +/- 0.410 1.260 +/- 0.400 Cs-134 0.016 +/- 0.026

-0.012 +/- 0.023

-0.023 +/- 0.018 Zr-95

-0.007 +/- 0.026 0.001 +/- 0.034 0.011 +/- 0.030 0.024 +/- 0.045 Ce-141.

Ce-144 0.023 +/- 0.031

-0.060 +/- 0.110 0.024+/-0.040 0.010:+/- 0.130 Cs-137 Fe-59

-0.013 +/- 0.030 0.005 +/- 0.053 0.045 +/- 0.038

-0.046 +/- 0.081 Nb-95 Ru-103 0.007 +/- 0.028

-0.002 +/- 0.024 b.031 +/- 0.039

-0.020 +/- 0.033 Co-58 0.002 +/- 0.024 0.002 +/- 0.032 1-131 0.040 +/- 0.049 0.000 +/- 0.077 Ru-106 0.110 +/-h 0.240 0.230 +/- 0.320 Co-60

-0.009 +/- 0.025 0.016:+/- 0.038 K-40 11.750 +/- 0.730 10.000 +/- 1.000 Sb-125 0.051 +/- 0.063

-0.033 +/- 0.079 Zr-95

-0.016+/- 0.041 0.047 +/- 0.059 24-C Ce-141 Ce-144 Co-58 01/16/08 02/20/08 03/19/08 04/09/08 04/23/08 05/07/08 05/21/08 06/11/08 06/26/08 07/09/08 09/10/08 09/24/08 10/08/08 10/22/08 11/19/08 12/10/08 01/16/08 02/20/08 03/19/08 04/09/08 04/23/08 05/07/08 05/21/08 06/11/08 0.005 +/- 0.040 D

-0.036 +/- 0.054 D

-0.018 +/- 0.055 D

-0.012 +/- 0.068 D 0.000 +/- 0.027 0.0 18 +/- 0.044

'0.007 +/- 0.027 0.000 +/- 0.053

-0.079 +/- 0.083

-0.011 +/- 0.052 0.001 +/- 0.028

-0.023 +/- 0.047 0.000 +/- 0.016

-0.008 +/- 0.024 0.021 +/- 0.044 0.009 +/- 0.065 D Cr-51

-0.010 +/- 0.200 0.130 +/- 0.280

-0.130 +/- 0.250 0.120 +/- 0.260 0.050 +/- 0.130 0.020 +/- 0.200 0.080 +/- 0.150 0.020 +/- 0.170 0.001 +/- 0.037

-0.100+/-0.110 0.003+/-0.023

-0.028 0.037 0.100 +/-0.140

-0.031 +/-0.033 0.043 +/- 0.033

-0.040 +/- 0.110 -

-0.003 +/- 0.025 0.004 +/- 0.033 0.030 +/-0.110 0.013 +/-0.027

-0.015 +/- 0.020

-0.032 +/- 0.076

-0.008 +/- 0.017

-0.013 +/-0.027

-0.030 +/- 0.110 0.009 +/- 0.023 0.010+/-0.024 0.054+/-0.071

-0.021 +/-0.017 0.009 +/- 0.028

-0.005 +/- 0.090

-0.023 +/- 0.032 0.005 +/-0.037 0.080 +/- 0.120 0.015 +/-0.026 0.010 +/- 0.028

-0.080 +/- 0.100

-0.005 +/- 0.025

-0.010+/- 0.017 -

-0.004:+/- 0.049 -

0.009 +/- 0.017 0.008 +/- 0.023 0.028 +/- 0.067 0.003 +/- 0.027

-0.004 +/- 0.009 0.027 +/- 0.031 0.005 +/- 0.010

-0.016 +/- 0.025

-0.022 +/- 0.083 -

0.003 +/- 0.020 0.000 +/- 0.024 0.070 +/- 0.078 0.010 +/- 0.024 0.010 +/-0.041 0.010 +/- 0.130

-0.018 +/- 0.036 Co-60

-0.012 +/- 0.027

-0.007 +/- 0.035

-0.020 +/- 0.026 0.004 +/- 0.031 0.007 +/- 0.018 0.000 +/- 0.022

-0.006 +/- 0.016 0.043 +/- 0.036

-0.026 +/- 0.038 -

0.014 +/- 0.026

-0.004 :1- 0.015 0.017 +/- 0.022

-0.002 +/- 0.013

-0.016 +/-0.021 -

0.008 +/- 0.022 0.005 +/- 0.043 K-40 Cs-137 Fe-59 1-131 0.042 +/- 0.027

-0.011 +/- 0.051

-0.012 +/- 0.042 -

11.140 +/- 0.720 0.019 +/- 0.031.

0.032 +/- 0.066 0.010 +/- 0.058 13.280 +/- 0.970 0.061 +/-0.033

-0.011 +/- 0.054

-0.054+/-0.071 11.090+/-0.710

-0.025 +/- 0.020 -

0.046 +/- 0.036 0.023 +/- 0.069 0.033 +/- 0.082 10.020 +/- 0.880 0.004 +/- 0.012

-0.002 +/- 0.018

-0.031 +/- 0.042 0.002 +/- 0.005 5.270 +/- 0.660

-0.002 +/- 0.017 0.014 +/- 0.025

-0.009 +/- 0.052

-0.005 +/- 0.002 -

6.100 +/- 0.880 0.015 +/- 0.016

-0.010 +/-0.019 0.003 +/- 0.034 0.003 +/- 0.001 3.920 +/-0.540 0.011 +/-0.024

-0.009+/-0.021

-0.016+/-0.061

-0.007+/-0.016 6.000+/- t.100 3-37

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 9, Pasture Grass (pCilg)

Collection Location Date Isotope 24-C Cr-51 Cs-134 Cs-137 Fe-59 1-131 K-40 06/26/08

-0.150 +/- 0.300 0.022 0.021

-0.012 + 0.030 0.031 +/- 0.093 0.002 +/- 0.013 4.180 +/- 0.920 07/09/08 0.030 + 0.220

-0.002 +/- 0.017 0.010 +/- 0.024

-0.014 + 0.055 -

0.029 +/- 0.035 6.130 + 0.830 09/10/08 0.000 +/- 0.130 0.002 +/- 0.010 0.002 +/- 0.010 0.005 +/- 0.036

-0.003 +/- 0.001 1.020 + 0.390 09/24/08 0.060 + 0.170

-0.012 : 0.016 0.008 + 0.020

-0.008 +/- 0.066 0.003 + 0.018 3.970 + 0.900 10/08/08

-0.024 +/- 0.062

-0.004 +/- 0.007 0.000 + 0.009

-0.007 + 0.025 0.003 +/- 0.014 4.210 +/- 0.420 10/22/08

-0.110 +0.150 0.007 + 0.014 0.007 +/- 0.018 0.035 + 0.053 0.012 0.023 5.940 0.770 11/19/08 0.080

0. 170

-0.004 +/- 0.015

-0.006 +/- 0.024

-0.008 +/- 0.057

-0.009 + 0.003 9.470 + 0.800 12/10/08

-0.050 +/- 0.260, 0.009 + 0.024 0.103 +/- 0.054 0.019 + 0.079

-0.099 +/- 0.069 5.900 +/- 1.000 La-140 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 01/16/08 0.005 + 0.040

-0.018 + 0.024

-0.031 +0.033

-0.001 +0.025-0.070+0.220 0.009+0.056 02/20/08

-0.036 +/- 0.054 0.024 +/- 0.032 0.051 + 0.048 0.043 + 0.033

-0.060 +/- 0.270

-0.004 + 0.073 03/19/08

-0.018 + 0.055 0.009 + 0.023

-0.001 + 0.030 -

0.008 + 0.024

-0.030 + 0.220 -

0.005 + 0.062 04/09/08

-0.012 +/- 0.068 0.001 + 0.025 0.046 + 0.033 0.002 +/- 0.028 0.040 + 0.250

-0.018 + 0.064 04/23/08 0.000 + 0.027

-0.006 + 0.016

-0.019 +/- 0.020 0.000 + 0.018

-0.060 + 0.140

-0.013 + 0.040 05/07/08 0.018 + 0.044

-0.007 +/- 0.022

-0.002 + 0.027

-0.007 +/- 0.022 -

-0.010 +/- 0.220

-0.020 +/- 0.057 05/21/08 0.007 + 0.027 0.006 + 0.017 0.017 + 0.030 0.008 +/- 0.016 0.080 + 0.140 0.004 + 0.040 06/11/08 0.000 +/- 0.053 0.004 +/- 0.033

-0.046 + 0.035 -

-0.022 + 0.028

-0.050 + 0.240 -

0.040 + 0.072 06/26/08

-0.079 + 0.083

-0.006 + 0.024 0.017 + 0.033 0.037 + 0.031 0.030 + 0.250

-0.005 + 0.063 07/09/08

-0.011 + 0.052 0.007 +0.024 0.004 + 0.025 0.020+: 0.022.

-0.010 0.210

-0.052 + 0.056 09/10/08 0.001+0.028

-0.003+0.012 0.011+0.015

-0.014+0.012

-0.030+0.120-

-0.019+4-0.030 09/24/08

-0.023 + 0.047 0.023 + 0.029

-0.019 + 0.030 0.005 + 0.025 0.090 : 0. 180

-0.005 + 0.051 10/08/08 0.000 + 0.016 0.006 + 0.010 0.007 + 0.009 0.000 +/- 0.007

-0.009 + 0.076 "

-0.006 + 0.023 10/22/08

-0.008 1 0.024 0.000 + 0.020

-0.012 + 0.025

-0.018 + 0.020 0.110 + 0.170

-0.013 + 0.048 11/19/08 0.021 + 0.044 0.007 + 0.021 0.003 + 0.024 0.005 + 0.019.

-0.130 + 0.180 -

-0.016 +/- 0.045 12/10/08 0.009+/- 0.065 0.021 + 0.034 0.029 +0.038 0.012 +/-0.033 0.340 +/- 0.280 0.019 +0.078 Th-228 Zn-65 Zr-95 01/16/08 0.030 + 0.130 0.140 + 0.100 0.030 + 0.042 02/20/08

-0.010 +0.160

-0.020 +0.120

-0.011 + 0.055 03/19/08 0.220 + 0.091

-0.095 + 0.057 -

0.011 + 0.044 04/09/08 0.000 + 0.150 0.009 + 0.069 0.010 + 0.052 04/23/08 0.040 - 0.081

-0.032 + 0.044

.-0.023 + 0.030 05/07/08 0.050 + 0.084

-0.048 + 0.058..

-0.010 + 0.039 -

05/21/08 0.079 +0.073 0.031 + 0.091 0.004 +0.027 06/11/08

-0.120 + 0.100

-0.025 + 0.079 -

-0.021 + 0.055 06/26/08 0.130 +/- 0.120 0.049 + 0.084 0.006 + 0.057 07/09/08 0.112 +0.090

-0.035 +0.063 -

0.006 +0.041 09/10/08 0.028 + 0.052 0.009 + 0.023 0.000 + 0.028 09/24/08

-0.012 + 0.081

-0.045 + 0.064 0.022 + 0.047 10/08/08 0.007 +/- 0.039

-0.005 + 0.028 0.008 + 0.017 10/22/08

-0.058 + 0.081 0.014 + 0.056

-0.006 + 0.039 11/19/08 0.000 + 0.098

-0.018 + 0.059 -

0.009 + 0.035 12/10/08 0.080 + 0.170 0.098 + 0.085 0.009 +/- 0.060 3-38

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 71 03/24/08 06/23/08 09/15/08 12/I 5/08 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/ 15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 Ba-140

-4.9+/-5.5 3.5 +/- 8.0 6.7 + 5.8 4,7 +/- 4.8 Cs-137

-3.7 +/- 3.2

-1.2+3.0

-0.4+ 1.8

-1.6 +/- 2.8 Mn-54 0.2 3.9 0.3 +/-2.7 1.5 +/-2.1

-0.8 +2.8 Sr-90 0.2 0.8 1.3 +1.0

-0.3 0.7

-0.8 1.0 Ba-140 2.3 +7.1

-3.1 +7.6

-2.3 +4.1 2.4 +/-5.6 Cs-137

-2.7 3.5 1.3 2.4

-0.8+ 1.5 0.4+/- 3.3 Mn-54

-3.4 + 3.4

-1.3 + 2.5 0.6+ 1.5 1.1+3.4 Sr-90 0.7 + 0.9 1.0 + 0.8 0.1 + 0.7

-1.1 + 1.0 Be-7

-15.0+/-27.0 16.0 +23.0 10.0 17.0

-14.0 +24.0 Fe-59 1.51:7.6 0.8 + 7.0

-0.3 + 4.1 1.5 +6.2 Nb-95

-1.2 +/- 6.4 1.3 + 3.4 0.9 2.5

-2.3+/-3.4 Th-228

-9.0+ 15.0 8.0+ 15.0 7.3 7.1 0.0+ 11.0 Be-7

-26.0 : 26.0 1.0+ 22.0

-1.0+

13.0 9.0 + 29.0 Fe-59 2.1 + 7.8 0.9 + 5.4 1.7 + 3.2 2.1 +6.5 Nb-95

-2.8 4.1

-2.6+ 3.4 0.4 1.8

-5.2+4.1 Th-228

-3.0 + 15.0 10.4 + 8.7

-1.3+

8.1 3.0+/- 14.0 Co-58 1.1 +/-3.6

-1.1 + 3.0

-1.9 +/-2.1

-3.7 + 2.9 H-3

-1090.0 + 900.0

-80.0 + 840.0 730.0 +/- 890.0

-100.0 + 910.0 Ru-103

-4.5 +/- 3.9

-3.6 + 3.3 0.8 + 2.9

-1.9 + 3.2 Zn-65 10.0+ 17.0

-4.8 + 5.5

-1.4 + 4.5 14.0+ 12.0 Co-58

-0.1 +3.9

-1.0+ 2.6

-1.6 + 1.5

-3.1 + 3.0 H-3

-820.0 + 900.0

-290.0 + 840.0 390.0 + 880.0 120.0 + 910.0 Ru-103

-1.2+/-* 3.6

-1.9 + 2.6

-2.0 +/- 1.8

-2.9 +/- 3.6 Zn-65

-0.5 +/- 8.7

-4.3 + 5.9 5.0 + 5.4

-2.0+ 11.0 Co-60 1.1+3.4 2.5 + 3.2 0.8 + 2.2 1,9

+ 2.9 1-131 1.4 +/- 6.3 2.4 + 8.8 2.5 + 5.8

-3.2 + 5.4 Ru-106 0.0 +/- 31.0

-7.0 + 29.0 12.0+/- 17.0 19.0 + 25.0 Zr-95 2.5 + 6.0

-0.7+ 5.3 1.2 + 3.6 4.1+5.0 Co-60 2.5 + 4.1

-0.1+2.8

-1.8+ 1.5

-2.2-+3.6 1-131

-6.8 + 5.5 4.2 + 7.3 3.8 + 5.6

-3.7 + 6.7 Ru-106

-19.0 +30.0

-2.0 21.0 3.0+ 13.0

-15.0 + 33.0 Zr-95

-4.1+6.0

-5.4 + 4.8 1.1 +2.5 1.2 + 6.3 Cr-51 7.0 + 33.0 10.0 + 26.0 10.0 + 31.0

-5.0 + 25.0 K-40 19.0 + 54.0

-38.0 + 50.0 3.0 + 44.0

-21.0 + 45.0 Sb-125 2.0+ 10.0 3.7 + 7.2

-0.7 + 4.9

-0.3 +/- 7.1 Cs-134 0.8 +/- 2.6 1.7+ 2.7

-0.9+ 1.3 0.6+/- 1.9 La-140

-4.9 + 5.5 3.5 + 8.0 6.7 + 5.8 4.7 + 4.8 Sr-89 1.5+ 3.7

-7.3 +3.1

-5.2 +/- 2.7

-2.1 +/- 3.3 72 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 Cr-51

- 1.0 + 24.0 5.0 + 21.0 7.0+ 15.0

-18.0 + 29.0 K-40 23.0 + 51.0 49.0 + 34.0 7.0 + 28.0 54.0 + 56.0 Sb-125

-2.3 + 8.3 0.4 + 6.2 0.8+ 3.8

-8.0 + 10.0 Cs-134 2.4 +3.0 0.2+ 1.8

-0.2 1.4 1,1 +2.8 La-140 2.3 7.1

-3.1+/-7.6

-2.3 +/-4.1 2.4+ 5.6 Sr-89 3.7 +4.0

-3.9 2.6 0.3 2.9

-1.3+ 3.2 3-39

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual. Radiological Environmental Operating Report 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 76-X 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 Ba-140 4.0 +/- 7.5 3.4 +/- 8.1

-5.2 +/- 5.6 0.9 +/- 5.7 Cs-137

-1.0 +/-3.8

-0.6 +4.2

-1.3+3.0

-2.7 +/-3.5 Mn-54

-1.04-4.4 2.514.1 0.6 +/- 3.2

-1.2+/-3.6 Sr-90 0.7+/- 1.0 0.5+/- 0.7 0.6+ 0.9 0.4 40.8 Ba-140 4.1 +6.5 1.4 +/- 4.8 7.6 8.8 2.0 6.6 Cs-137

-0.5 +/- 2.8

-3.8 +/- 3.2 0.0 +/-3.8

-3.1+-3.6 Mn-54

-0.4 +/- 2.7 1.1+ 3.1 2.0 43.4

-0.6+/- 2.9 Sr-90 0.9 0.8 0.4 +0.7 0.6 0.8 0.3 40.7 Be-7 2.0 +/- 30.0

-4.0 +/- 29.0

-1.0 +/-26.0 3.0 +/- 27.0 Fe-59

-5.0 10.0

-1.5 9.3.

-0.7 +/-6.6

-6.9+ 8.0 Nb-95

-0.3 +/- 4.8

-3.8 +/- 5.7

-4.3++/-4.2 0.9 +/- 6.5 Th-228 4.0+ 16.0 13.0+ 19.0 10.0 12.0 4.0 14.0 Be-7

-3.0 +/- 25.0

-23.0 +/- 27.0

-3.0- 31.0 7.0 +/-28.0 Fe-59 1.8+6.2

-2.6 +7.2 0.7 48.2

-4.8 6.5 Nb-95 3.6 +/- 5.0 2.5 + 4.4 1.6+ 4.7

-2.6 + 5.9 Th-228 0.04-11.0 0.0+ 14.0 1.0+/- 18.0 0.0+ 12.0 Co-58 0.9+ 4.6

-2.6 - 4.0

-1.3 4 3.5

-2.2 + 3.6 H-3 140.0 k 920.0

-50.0 + 870.0

-400.0 + 850.0 460.0 +/- 900.0 Ru-103 0.3 +4.4 0.5 +/- 3.9 0.2 + 3.6 0.1 13.9 Zn-65 3.6 +/- 8.8

-3.0 + 12.0

-14.4+ 8.1 23.0 + 17.0 Co-58

-4.6 + 2.9

-0.7 + 3.5

-1.2 + 3.8

-6.5 + 3.4 H-3

-180.0 + 900.0

-20.0 + 890.0

-160.0++/- 830.0 120.0 +/- 890.0 Ru-103

-1.4 +/- 3.0

-0.6 +/- 3.4 0.0++/-4.1

-3.1 + 3.5 Zn-65 4.0++/- 13.0 4.0++/- 13.0 7.0+/- 16.0 0.0++/- 16.0 Co-60 0.7+ 4.1

-5.1 5.1

-0.6+ 3.4 1.6 3.8 1-131 2.1 +/-6.4 0.3 + 5.9 0.0+ 7.2 1.1++/-6.4 Ru-106 24.0 36.0 7.0+ 31.0

-17.0 +33.0 6.0+ 32.0 Zr-95

-11.2+/-8.3 0.1+-7.0

-2.2+/- 5.9

<0.0+/- 6.1 Co-60 1.4 +/- 2.9 0.0 +/- 3.3 2.9++/-4.9 0.7 +/- 3.0 1-131

'8.7 6.5

-0.5 +6.2 0.0 +7.7 2.0 6.4 Ru-106

-12.0+ 25.0

-3.0+ 32.0

-10.0+ 31.0 2.0 +28.0 Cr-51 5.0 +/- 33.0

- 15.0 +/- 31.0 3.0 +/- 29.0 1.0 +/- 33.0 K-40

-55.0 +70.0 53.0 +56.0

-4.0 44.0 24.0 +/-52.0 Sb-125

-2.0+/- 10.0

-1.0+/- 11.0 3.2+/- 8.0 6.0 +/- 9.0 Cs-134 0.4+ 2.9 0.5+/-: 3.0 1.5 2.4

-0.2 +/-3.7 La-140 4.0 +/- 7.5 3.4 +/- 8.1

-5.2 +/- 5.6 0.9 +/- 5.7 Sr-89 0.3 +/- 4.1

-4.1 + 2.9 0.1+3.2

-5.8 +/- 3.7 77-X 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 Cr-51

-9.0 + 29.0

-4.0 +/- 29.0 16.0 +/-33.0

-14.0 +/- 27.0 K40

-14.0 +/- 37.0 28.0 + 54.0 15.0 + 65.0

-7.0 + 52.0 Sb-125 0.2 + 7.6 4.6 +/- 8.2

-2.5++/-9.1

-1.9+/-9.3 Cs-134

-0.2 +/- 2.9 0.3 +/- 3.5

-0.6+ 2.5 1.2 2.3 La-140 4.1 +/- 6.5 1.4 +/- 4.8 7.6 +/- 8.8 2.0+/- 6.6 Sr-89

-2.1 +3.4

-4.6+/-3.0-1.2+

2.9 0.8 ý 3.5 Zr-95

-3.3 +4.9 2.2 +5.8

-2.5 7.4 0.9 5.3 3-40.

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 78-X 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/18/08 09/12/08 12/10/08 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 03/24/08 06/23/08 09/15/08 12/15/08 Ba-140 1.6+/-8.0 1.3 +/-8.0 1.7:+/- 7.9

-3.2 +/- 5.5 Cs-137

-0.1+/-3.6

-1.2+/-3.9

-0.2 +/- 3.3

-2.4 +/-- 2.6 Mn-54

-4.4+/-4.2

-1.2:+/- 3.4 4.6+/- 3.6

-0.3 +/- 2.4 Sr-90 1.0 + 0.9 0.5 + 0.7 0.4 +/- 0.8 0.3 +/- 0.7 Ba-140 2.8 6.9

-4.7 +/-6.4 1.8 +/-4.0 2.0 6.8 Cs-137 0.5 +/- 4.3

-0.9 +/- 2.2

-0.3 +/- 1.5

-3.1+/-3.0 Mn-54

-1.1+/-3.7 0.2 1.9 0.2+/- 1.5

-4.3 +/-3.6 Sr-90 0.2 +/- 0.9 1.2 +/- 0.8

-0.1+/-0.7 0.7+/- 1.0 Be-7 43.0:+/- 35.0

-260 +/- 27.0 14.0+/- 30.0 7.0 +/- 19.0 Fe-59

-2.0 10.0

-2.3 +/-7.6 2.1+/-6.6 0.9 5.8 Nb-95 0.6 5.3

-1.6 4.3

-1.2 4.5 0.7 +/-2.8 Th-228 6.0+/- 17.0 18.0+/- 18.0 10.0

+/-16.0 2.0+/- 13.0 Be-7

-8.0 +/- 33.0

-7.0+/- 18.0

-1.0+/- 13.0

-5.0 +/- 28.0 Fe-59 3.8+/- 8.7

-1.1+/-5.2

-2.8 3.7

-3.0 6.9 Nb-95

-1.3 4.8 1.8+/-2.5 1.3 3.1

-4.5 +/-4.7 Th-228

-1.0+/- 14.0 7.2 +/- 8.5 2.4+/- 3.1

-19.0+/- 12.0 Co-58 0.0 +/- 4.2

-2.6 +/- 3.6

-1.0+4.0

-1.1 +/-2.5 H-3

-200.0 +/- 890.0

-80.0 +/- 890.0 70.0 +/- 860.0 380.0 +/- 900.0 Ru-103

-1.9+/- 4.5 0.9 +/- 3.9

-3.1 +/-3.8 0.0 +/- 2.4 Zn-65

-9.0 10.0

-12.0+/- 10.0

-7.6 +/- 7.4

-3.9 5.8 Co-58

-0.3 +/- 3.7

-1.1 +/- 2.2 0.1 +/-1.6

-1.7 +/- 3.7 H-3

-480.0 +/- 900.0

-510.0 +/- 830.0 450.0 +/- 880.0 610.0 +/- 930.0 Ru-103

-3.1 +/-3.5 0.4 +/- 2.4 0.5 +/- 2.0 0.0 +/- 4.0 Zn-65

-0.3 = 9.7 3.1 4.7

-2.1 3.6 9.0+/- 14.0 Co-60

-2.2+/-4.4 0.7 4.3

-0.1 3.9 2.0 2.8 1-131

-1.6+/- 7.5 1.9 +/- 6.4

-1.0 +/- 6.2 1.0 +/- 5.7 Ru-106 5.0 +/- 40.0

-1.0+/- 33.0 8.0 32.0 0.0 23.0 Zr-95

-1.7 +/- 6.8

-3.7 +/- 6.0 0.3 +/- 5.8 1.5 +/-4.2 Co-60 2.2 4.5

-0.5 2.4 0.3+/- 1.7 1.7+/- 3.6 1-131

-0.6 7.4

-2.3 6.9 2.4 5.5

-3.3 6.9 Ru-106

-34.0 36.0

-1.0+/- 19.0

-5.0 14.0 11.0+/-33.0 Zr-95

-1.4 +/-7.0 1.8 3.6 0.5 2.9

-2.6+/- 6.1 Cr-51 20.0 +/- 37.0 25.0 +/- 34.0 26.0 +/- 28.0

-13.0 +/- 21.0 K-40 42.0 +/- 59.0

-67.0 +/- 59.0 15.0+/- 61.0

-19.0 +/- 43.0 Sb-125 9.0+/- 10.0 0.0 9.3

-1.5 +/- 8.4 3.7 +/- 6.2 Cs-134 0.6 +/-3.7

-0.1 2.6 0.0 2.5

-0.8 2.3 La-140 1.6 +/- 8.0 1.3 +/- 8.0 1.7+/- 7.9

-3.2:+/- 5.5 Sr-89

-3.3 3.7

-3.8 2.9

-0.4 2.8

-1.7 3.3 79 Cr-51

-8.0:+/- 36.0

-9.0+/- 21.0

-4.0+/- 17.0

-13.0 +/- 31.0 K40 31.0+/- 50.0

-48.0 +/- 45.0

-12.0 +/- 29.0

-10.0 +/- 53.0

.Sb-125

-4.0 11.0

-1.3 5.0

-0.9 3.6

-1.0 9.6 Cs-134

-2.8 +/- 3.2

-0.3+/- 1.6 1.0+/- 1.1 1.7 +/- 2.7 La-140 2.8 +/- 6.9

-4.7 +/-6.4 1.8 +/- 4.0 2.0 +/- 6.8 Sr-89 2.1 +/-3.8

-4.9 +/- 2.6

-1.0 +/- 2.9

-1.3+/- 3.6 3-41

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 80 03/25/08 06/23/08 09/17/08 12/1 5/08 03/25/08 06/23/08 09/17/08 12/15/08 03/25/08 06/23/08 09/17/08 12/15/08 03/25/08 06/23/08 09/17/08 12/15/08 Ba-140

-1.4+ 6.4

-5.3+/-6.7

-1.1 +/- 5.5 1.3+6.1 Cs-137

-2.8++/-3.7

-1.8 +/-2.2

-1.7+ 1.8

-4.3 +/- 3.5 Mn-54

-2.3 74.2

-2.1 +2.4

-0.1+E2.0 0.2 +/- 2.7 Sr-90 81 03/25/08 06/23/08 09/1 7/08 12/15/08 03/25/08 06/23/08 09/17/08 12/15/08 0.2+ 1.0 0.7+/- 1.0 0.4+ 1.0 0.5 +/- 1.0 Ba-140

-1.2 +/- 5.3 1.0 +/- 6.5 0.3 +/- 5.9

-3.3 - 5.6 Cs-137

-0.7 +/- 3.4

-1.2 +/- 2.0 1.94 2.3 0.8+3.2 Mn-54

-0.5 + 2.6

-2.0 +/- 2.1

-1.0+ 2.1

-0.2 +/- 3.5 Sr-90

-0.1+.0.5

-0.3 +/- 0.9 0.1++/-0.8

-1.1 + 1.0 Be-7 2.0 +/-29.0

-6.0 +22.0

-1.0+ 17.0

-46.0 +26.0 Fe-59

-2.5 +/-7.8

-1.1+/-5.9

-0.81-4.6

-0.4 + 6.6 Nb-95

-4.4 + 4.9

-2.6 +/- 3.6

-1.8+ 2.7

-3.4 +/- 5.6 Th-228 15.0+ 17.0 6.0+ 12.0 5.0+ 13.0 6.0+ 18.0 Be-7

-4.0 +/- 22.0

-8.0+/- 19.0

-7.0 + 21.0

-7.0 + 24.0 Fe-59 4.31 5.9 2.7 + 5.5 1.1 +5.0

-2.9 + 6.7 Nb-95 1.3 +3.5

-1.5 +3.3

-2.5 +2.9

-1.6 4.3 Th-228 9.0+ 15.0 0.0+ 11.0 9.0+ 7.4 2.0 +13.0 Co-58 0.1 3.9

-2.1 +2.8

-1.3 + 2.0

-1.8+ 3.1 H-3

-160.0 + 920.0 560.0 + 860.0 320.0 +/- 870.0

-450.0 +/- 900.0 Ru-103 1.6+ 3.6

-4.1 + 3.1

-1.9 +/- 2.2

-0.1 +/- 3.2 Zn-65

-8.0++/- 10.0 1.0++/-7.8 4.8 + 8.1 18.0++/- 15.0 Co-58

-0.1 + 2.7

-2.9 + 2.4 0.0 E 2.3

-1.0 + 3.4 H-3 140.0 + 900.0

-180.0 + 850.0 380.0 + 880.0

-190.0 + 900.0 Ru-103

-0.5 + 2.8

-0.6 + 2.9

-1.9 +/-2.6 0.8 + 3.4 Zn-65 7.0++/- 13.0

-1.5 +/- 6.6

-1.4 + 8.3 10.0++/- 14.0 Co-60 3.7 +/- 4.2 2.1 +2.6

-0.8 +/- 2.4

.0.6 + 3.4 1-131

-1.0 +/- 5.7

-0.3 + 8.1 0.7 + 5.3 0.7 +/- 6.5 Ru-106 6.0 +32.0

-1.0+ 22.0 8.0 16.0

-2.0 +27.0 Zr-95

-2.5 + 6.3

-2.7 +4.8

-0.8 +3.8

-4.5 +5.2 Co-60 0.0+ 3.3

-0.7 +2.3

-0.1+/-2.4 0.7+ 3.9 1-131 0.2 +/- 5.1

-2.0 + 7.6

-8.8 + 7.9 2.0 + 5.6 Ru-106 4.0 + 26.0 4.0+ 19.0

-13.0 +/- 22.0

-10.0 +/- 26.0 Zr-95

-2.0 + 4.7

-2.6++/-4.2

-0.8 + 4.2 4.3 + 6.2 Cr-51

-10.0 +/- 31.0

-34.0 + 27.0 6.0+ 17.0 5.0 +/- 28.0 K-40 328.0 + 89.0 103.0+/- 49.0 33.0 + 41.0 0.0 + 52.0 Sb-125

-0.5 + 9.4

-L.3+/-5.9

-2.6 + 4.6

-2.1 + 7.7 Cr-51 8.0 +26.0 7.0 24.0

-5.0+22.0 10.0+ 25.0 K-40 23.0+ 51.0 20.0+ 40.0 2.0- 37.0

-36.0+/-+51.0 Sb-125 8.4+7.3 5.5 +/- 5.4 0.0++/-5.7

-0.94

+7.8 Cs-134 0.5+/- 3.1 0.7+ 1.6

-0.2 +/- 2.0

-0.5 + 2.2 La-140

-1.2 + 5.3 1.0:.6.5 0.3 +5.9

-3.3 +5.6 Sr-89

-1.4+ 2.2

-4.1++/-2.8

-1.2 +/- 3.0

-5.3 + 2.9 Cs-134 0.8 + 2.6

-0.6+/- 1.8 0.4+ 1.4 0.3 +/- 2.8 La-140

-1.4 +/- 6.4

-5.3 + 6.7

-1.1 +/-5.5 1.3 +6.1 Sr-89 1.4: 4.3 0.8 +5.0

-0.88 3.6

-2.6 3.5 03/25/08 06/23/08 09/17/08 12/15/08 03/25/08 06/23/08 09/17/08 12/15/08 3-42

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 82 03/25/08 06/25/08 09/17/08 12/15/08 03/25/08 06/25/08 09/17/08 12/15/08 03/25/08 06/25/08 09/17/08 12/15/08 03/25/08 06/25/08 09/17/08 12/15/08 Ba-140 2.7+/-6.1 0.3 6.5 5.1 16.3

-3.1 +/- 7.6 Cs-137

-2.1 +/-3.7

-0.9 +/- 3.0 0.4 +/- 2.6 1.3 +/- 3.6 Be-7 3.0 +/- 27.0 5.04-24.0 6.0+/-.22.0 15.0 : 32.0 Fe-59 5.7 +/- 7.6

-3.6 +/- 6.1

-1.4 +/- 5.9 0.8 +/- 7.3 Nb-95 3.6 +/- 6.5 0.3 +/- 3.5

-5.5 +/- 5.1

-3.5 +/- 4.2 Th-228 Co-58 1.5+/-* 3.5

-1.5 +/- 2.8 0.6 +/- 2.8 0.7 +/-,3.7 H-3

-100.0 - 920.0 310.0+/- 850.0 340.0 +/- 880.0 460,0 - 920.0 Ru-103 2.1 +/-3.8 0.2 +/- 2.8

-0.8 +/- 3.2

-2.8 +/- 4.4 Zn-65 Mn-54

-2.4 +/-3.5

-2.3 +/- 2.7 1.1+/-2.7 0.2+/- 3.2.

Sr-90 83 03/25/08 06/25/08 09/15/08 12/15/08 03/25/08 06/25/08 09/15/08 12/15/08 03/25/08 06/25/08 09/15/08 12/15/08 03/25/08 06/25/08 09/15/08 12/15/08 0.1 0.9

-0.1 +/-0.7

-0.3 +/-0.8

-1.1 +/-1.0 Ba-140 2.9 +/- 7.3 5.9+/- 7.0 2.3 +/- 6.2 1.9 +/- 7.2 Cs-137

-0.5 +/-3.5 0.7 +/-2.7

-0.2 1.9 1.5 +/-2.6 Mn-54

-0.8 +/- 3.5

-2.3 +/- 3.0

-0.1 +/- 1.9

-1.6 +/- 2.8 Sr-90

-0.3 + 0.9 0.3 0.7 0.3+/- 0.9 0.6+/- 1.0

-5.0+/- 11.0 7.0+/- 14.0 0.0 +/-13.0 Be-7 19.0 +/- 55.0

-10.0+/- 24.0 1.0+/- 16.0

-15.0+/- 21.0 Fe-59 2.0 +/-7.5

-1.9 7.0

-2.8 4.4

-1.0 6.6 Nb-95 2.9 +/- 5.0 0.2 +/- 4.5

-1.7 +/- 2.5 2.9 +/- 3.3 Th-228

-17.0+/- 14.0 8.0+/- 13.0

-9.0+/-11.0 4.0+ 14.0

-10.0+/- 15.0

-5.0+/- 16.0 1.0+/- 12.0 6.0 +/- 11.0 1.0 +/- 14.0 Co-58

-1.6 +/- 4.0

-3.9 +/- 3.0

-0.7 +/- 2.0

-1.1 +/- 3.0 H-3

-100.0 +/- 900.0

-310.0 +/- 800.0 430.0 +/- 880.0 250.0 +/- 910.0 Ru-103 4.1 +/- 4.4

-0.9 +/- 3.7

-1.8+/- 2.2

-1.4 2.7 Zn-65

-4.0+/- 16.0

-2.0 +/- 14.0 3.0 +/- 8.4 2.0 +/- 11.0 Co-60

-0.3 +/- 3.8 1.6+/-* 2.8

-1.4 +/- 2.8

-0.6 + 3.9 1-131

-1.9 +/- 6.6

-2.3 +/- 8.3 2.2 +/- 8.6 2.3 +/- 7.1 Ru-106 4.0 +/- 31.0

-18.0 +/- 26.0 7.0 +/- 23.0

-9.0 +/- 31.0 Zr-95

-1.8 +/- 6.4

-3.6 +/- 4.5

-4.2 +/-5.1 0.8 + 6.3 Co-60

-1.4 +/- 3.4 0.0 +/- 2.8

-0.9+/-2.1

-3.2 +/- 3.0 1-131

-0.8 +/- 7.7

,0.5 +/- 8.4 3.3 + 7.5

-7.5 +/- 7.3 Ru-106

-45.0 -37.0

-6.0 +/- 28.0 2.0 +/- 18.0 2.0 +/- 24.0 Cr-51

-5.0 +/- 34.0

-9.0 +/- 29.0 14.0 +/- 28.0

-12.0+/- 31.0 K-40 15.0 +/- 56.0

-8.0 +/- 42.0

-12.0 +/- 43.0 30.0 +/-58.0 Sb-1 25

-0.4 +/- 9.0 0.7 +/- 7.3

-1.3 +/-6.5

-7.0 :L 11.0 Cr-51

-5.0 +/- 36.0 3.0+/- 31.0 2.0 +/- 20.0 5.0 +/- 22.0 K40

-1.0 +/- 59.0 1.0 +/- 47.0 16.0 +/- 39.0

-8.0 +/- 50.0 Sb-125

-3.0 +/- 9.5 3.0 +/- 7.2

-6.2 +/- 4.5 1.0++/- 6.1 Cs-134

-0.3 +/- 2.9 1.6 +/- 2.1

-1.1 +/- 1.9 1.5 +/- 2.4 La-140 2.9 +/- 7.3 5.9 7.0 2.3 +/- 6.2 1.9+/- 7.2 Sr-89

-1.0 +/- 4.1

-2.3 +/- 2.7

-1.4*+/- 3.3

-1.4 +/- 3.8 Cs-134 1.2+/- 2.8

-1.4+/- 3.0 0.2+/- 2.0 2.3 +/- 2.5 La-140 2.7 -6.1 0.3 +/- 6.5 5.1 +/-6.3

-3.1 +/- 7.6 Sr-89 0.5 +/- 3.6

-2.4 +/- 2.6

-0.2 :+/- 3.0

-5.1 +/- 3.1 Zr-95 5.0 +/-7.3

-1.3 5.2 0.7 +/-3.5 3.2 +/-4.6 3-43

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 84 Ba-140 Be-7 Co-58 Co-60 Cr-51 Cs-134 03/25/08 1.8 + 7.6 2.0 +/- 32,0 2.3 +/- 4.3 0.3 +/- 4.6 16.0 +/- 33.0 0.7 + 2.7 06/23/08 E

09/15/08 0.8 +/- 6.6 6.0 +/- 19.0 0.1 +/-2.3 1.0 +/- 2.3 5.0 +/- 33.0

-0.1 +/- 1.4 12/15/08 0.4 +/- 6.7 1.0 +/- 22.0

-1.8 +/-2.6 1.2 +/- 3.0

-14.0 +/- 25.0 0.4 +/-2.1 Cs-137 Fe-59 H-3 1-131 K-40 La-140 03/25/08

-1.7 +/-: 3.8

-0.8 8.7

-310.0 +/- 900.0

2.7 +/- 6.4 27.0 +/- 65.0 1.8 +/- 7.6 09/15/08 0.1 +/- 2.0 4.8 +/-4.8 560.0:+/- 890.0 0.0 +/- 7.1

-13.0 +/- 45.0 0.8 +/- 6.6 12/15/08 0.3 +/- 2.7

-2.2 +/- 5.8

-450.0 +/- 890.0

-0.6 +/- 8.6 1.0 1 42.0 0.4 +/- 6.7 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 Sr-89 03/25/08 0.7 +/- 3.9

-2.6 +/-5.4 1.2 +/- 4.1 0.0+33.0

-9.0+/- 10.0

-0.2 +/- 3.9 09/15/08 1.0 +/- 2.1 2.3 +/-2.9

-2.1 +/- 2.4 1.0+/- 17.0

-2.2 +/-5.0

-0.7:+/- 3.0 12/15/08

-2.2 +/- 2.4 1.0 3.1 0.6 +/- 2.9 t 1.0 +/- 24.0 1.7 +/-5.9

-3.7 +/- 3.4.

Sr-90 Th-228 Zn-65 Zr-95 03/25/08 0.0 +/-0.9 10.0 +/- 16.0

-2.3 +/- 9.5

-1.7 +/- 7.1 09/15/08

-0.1 +/-0.8 6.7+/-7.3

-1.3+/-4.6 1.8+/-4.1 12/15/08

0. +/- 1. 1 10.2 +/- 9.8

-3.2 +/- 5.5 0.2 +/- 4.5 85 Ba-140 Be-7 Co-58 Co-60 Cr-51 Cs-134 03/24/08

-1.4 :L 6.5

-11.0+/-29.0

-1.7+/-3.3

-0.8+/-4.3

-3.0+/-36.0 0.3 :+/- 3.2 06/23/08

-2.5 +/- 6.2 5.0 +/- 14.0 0.6+/- 1.7 0.4+/- 1.7

-2.0:+/- 16.0

-0.6 +/- 1.0 09/11/08

-0.8+/-6.3

-4.0+/- 15.0

-0.1 +/- 1.8 1.4+/-2.0 7.0+/- 19.0

-0.5+/- 1.7 12/02/08

-0.6+/-4.7 0.0+/- 13.0

-0.7+/- 1.3

-0.8+/- 1.2

-12.0+/- 14.0

-1.1 +/- 1.3 Cs-137 Fe-59 H-3 1-131 K-40 La-140 03/24/08 0.4 +/- 3.7

-3.7 +/- 8.8

-90.0 +/- 9 10.0 0.4 +/- 7.4

-4.0 +/- 60.0

-1.4 +/- 6.5 06/23/08

-0.1 +/- 1.5 1.7 +/- 4.0

-70.0 +/- 840.0 9.9 +/- 7.6

-14.0 +/- 35.0

-2.5 +/- 6.2 09/11/08

-0.7+/- 1.8 2.1 +/- 4.3 640.0 +/- 900.0 6.3 +/-8.4 70.0 +/- 24.0

-0.8 +/- 6.3 12/02/08

-0.1 +/- 1.2

-2.0 +/- 2.7 790.0 +/- 940.0 2.4+/- 7.6 5.0 +/- 21.0

-0.6 +/- 4.7 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 Sr-89 03/24/08

-0.6 +/- 4.1 2.0 +/- 5.2

-0.1 +/- 4.7

-7.0 +/- 42.0 7.3+/- 8.9

-0.2 +/- 3.8 06/23/08

-0.2 +/- 1.5 0.3 +/- 2.2

-2.0 +/- 1.9

-3.0 +/- 12.0

-2.8 +/-3.6

-3.7 +/- 2.9

.09/11/08

-0.6+/- 1.6 1.2+/-2.2

-0.4+/-2.0 15.0+/- 16.0

-1.5+/-4.0

-0.4+/-3.6 12/02/08 0.9 +/- 1.2

-1.7+/- 1.9

-1.8+/- 1.6

-14.0+/- 12.0

-0.1 +/-3.3

-3.6+/-4.1 Sr-90 Th-228 Zn-65 Zr-95 03/24/08 0.0 +/- 0.8

-5.0 +/- 16.0

-1.5 +/- 8.7 5.0 +/- 7.5 06/23/08 0.6 +/- 0.8 14.4 +/- 9.3

-0.8 +/- 3.2 0.7 +/- 3.2 09/11/08 0.5 +/- 0.9 14.6 +/- 5.9 8.8:+/- 7.2

-1.5 +/-3.1 12/02/08 0.1 +/- 0.9 0.9 +/- 6.5

-1.0 +/- 3.5 1.2 +/-2.5 3-44

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 10, Well Water (pCi/L)

Collection Location Date Isotope 86 03/24/08 06/23/08 08/21/08 09/I 1/08 12/02/08 03/24/018 08/21/08 09/11/08 12/02M08 03/24/08 08/21/08 09/11/08 12/02/08 03/24/08 08/21/08 09/11/08 12/02/08 Ba-140

-0.8 +/- 7.3 F

-0.7 6.6 4.6 7.0 4.8 4.6 Cs-137 4.6 +/- 4.2 2.8 +/- 2.6 0.2+/- 1.2

-0.1 +/- 1.2 Be-7 1.0+/-34.0 17.0 +/-23.0 16.0-13.0

-9.0+/- 13.0 Fe-59 3.4+/- 7.7

-3.3 +/- 5.6

-1.3+/-3.1 0.7 +/- 2.8 Nb-95

-1.8+/- 4.7 2.0+/-5.0

-0.3 +/- 2.6

-1.8+/- 1.9 Th-228 2.0+/- 14.0 12.4 +/- 8.0

-1.3 +/- 8.0 1.5 +/- 6.4 Co-58 1.6+/- 3.9 1.6F

+/-2.5

-0.8+/- 1.4 0.2+/- 1.3 H-3

-690.0 +/- 900.0 2310.0 +/- 250.0 890.0 +/- 900.0 500.0 +/- 940.0 Ru-103

-1.1 4.2 0.8 2.8

-2.2+/- 1.8

-2.7 +/- 1.7 Zn-65

-8.2 +/- 8.3.

-1.4 +/- 5.4 0.1 +/-4.5 2.7 +/- 3.6 Co-60 0.8 4.1

-0.4 +/-2.5

-0.8+ 1.2

-0.3 +/- 1.3 1-131

-0.1 +/-8.1 3.9 9.5 2.4 +/-8.7 4.2: 7.7 Ru-106

-14.0 +/- 43.0

-28.0 +/- 34.0

-9.0+/- 11.0

-2.0+/- 11.0 Cr-51

-15.0 39.0

-9.0 29.0

-1.0 17.0

-1.0+/- 14.0 K40

-21.0+/- 44.0 28.0 49.0 9.0 +/-26.0 16.0+/- 22.0 Sb-125 9.01 11.0

-1.1+/-6.6

-0.1 +/-3.2 0.8 +/- 3.3 Cs-134

-1.2 +/- 3.4 0.6+/-2.2 1.2+/- 1.1

-0.5+/-1.1 La-140

-0.8:+/- 7.3

-0.7 +/- 6.6 4.6:+/- 7.0 4.8 +/- 4.6 Sr-89 2.2 +/- 4.0

-21.0+/- 12.0

-0.4 +/- 4.7 1.0 +/- 4.7 Mn-54

-0.6 +/- 3.9

-0.4 +/- 2.5

-0.8+/- 1.2 0.5+/- 1.1 Sr-90

-0.4 0.9 2.9 2.6 1.3+/- 1.1 0.0 1.0 Zr-95 3.7 +/- 6.5

-2.9 +/- 4.5 0.2 +/- 2.5 0.4 +/- 2.3 3-45

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 12, Fruits & Vegetables (pCi/g)

Collection Location Date Isotope 25 06/18/08 LETTUCE 06/18/08 06/26/08 09/03/08 09/03/08 06/18/08 06/18/08 06/26/08 09/03/08 09/03/08 06/18/08 06/18/08 06/26/08 09/03/08 09/03/08 06/18/08 06/18/08 06/26/08 09/03/08 09/03/08 06/18/08 06/18/08 06/26/08 09/03/08 09/03/08 06/26/08 06/26/08 09/03/08 09/03/08 06/26/08 06/26/08 09/03/08 09/03/08 06/26/08 06/26/08 09/03/08 09/03/08 STRAWBERRIES RHUBARB CABBAGE PEACHES LETTUCE STRAWBERRIES RHUBARB CABBAGE PEACHES LETTUCE STRAWBERRIES RHUBARB CABBAGE PEACHES LETTUCE STRAWBERRIES RHUBARB CABBAGE PEACHES LETTUCE STRAWBERRIES RHUBARB CABBAGE PEACHES LETTUCE STRAWBERRIES APPLES LETTUCE LETTUCE STRAWBERRIES APPLES LETTUCE LETTUCE STRAWBERRIES APPLES LETTUCE Ba-140 Be-7 Ce-141 Ce-144 Co-58 0.000 +/- 0.038 0.180 +/- 0.160 0.008 +/- 0.024 0.001 +/- 0.068

-0.012 +/- 0.019

-0.006 +/- 0.025

-0.040 +/- 0.150 0.009 +/- 0.024 0.008 +/- 0.094

-0.006 +/- 0.015 0.003 +/- 0.023 0.330 +/- 0.110 0.014 +/- 0.013 0.014 +/- 0.039 0.001 +/- 0.010 0.025 +/- 0.030

-0.040 +/- 0.120 0.005 +/- 0.023

-0.088 +/- 0.066

-0.010 +/- 0.020 0.005 +/- 0.034

-0.050 +/- 0.130

-0.008 +/- 0.023

-0.002 +/- 0.077

-0.002 +/- 0.015 Co-60 Cr-51 Cs-1 34 Cs-1 37 Fe-59

-0.005 +/- 0.019 0.190 +/- 0.140 0.003 +/- 0.013 0.012 +/- 0.023 0.022 +/- 0.035

-0.002 +/- 0.012

-0.150 +/- 0.170 0.012 +/- 0.011

-0.005 +/- 0.017 0.009 +/- 0.032

-0.006 +/- 0.011

-0.036 +/- 0.080 0.001 +/- 0.006 0.003 +/- 0.009 0.003 +/- 0.028 0.010 +/- 0.021 0.060 +/- 0.130

-0.008 +/- 0.013 0.018 +/- 0.018 0.014 +/- 0.037 0.000 +/- 0.022

-0.080 +/- 0.130

-0.006 +/- 0.013 0.008 +/- 0.022

-0.005 +/- 0.033 1-131 K-40 La-140 Mn-54 Nb-95

0.009 +/- 0.029 1.890 +/- 0.590 0.000 +/- 0.038 0.008 +/- 0.023

-0.024 +/- 0.029

-0.022 +/- 0.027 1.030 +/- 0.330

-0.006 +/- 0.025

-0.005 +/- 0.017 0.033 +/- 0.030 0.003 +/- 0.030 5.690 +/- 0.360 0.003 +/- 0.023 0.002 +/- 0.009

-0.001 +/- 0.012

-0.006 +/- 0.021 1.690 +/- 0.500 0.025 +/- 0.030 0.000 +/- 0.020

-0.008 +/- 0.019 0.004 +/- 0.029 1.850 +/- 0.540 0.005 +/- 0.034

-0.008 +/- 0.018 0.007 +/- 0.018 Ru-103 Ru-106 Sb-125 Th-228 Zn-65

-0.002 +/- 0.016 0.000 +/- 0.150

-0.004 +/- 0.047

-0.087 +/- 0.069 0.031 +/- 0.098

-0.005 +/- 0.015 0.230 +/- 0.170 0.005 +/- 0.045

-0.023 +/- 0.058 0.041 +/- 0.078

-0.002 +/- 0.010 0.003 +/- 0.073 0.004 +/- 0.020 0.014 +/- 0.041

-0.011 +/- 0.023 0.013 +/- 0.015 0.030 +/- 0.140 0.007 +/- 0.043 0.029 +/- 0.063

-0.015 +/- 0.047

-0.003 +/- 0.017

-0.060 +/- 0.190

-0.023 +/- 0.043

-0.024 +/- 0.066

-0.021 +/- 0.036 Zr-95 0.006 +/- 0.036 0.014 +/- 0.030

-0.008 +/- 0.018

-0.022 +/- 0.029

-0.025 +/- 0.030 Ba-140 Be-7 Ce-141 Ce-144 Co-58 0.003 +/- 0.019 0.045 +/- 0.079 0.004 +/- 0.009 0.003 +/- 0.040 0.002 +/- 0.007 0.000 +/- 0.021 0.070 +/- 0.072

-0.008 +/- 0.012 0.003 +/- 0.039 0.007 +/- 0.008 0.025 +/- 0.025 0.100 +/- 0.150 0.008 +/- 0.022 0.016 +/- 0.089 0.015 +/- 0.021

-0.006 +/- 0.024 0.020 +/- 0.130

-0.003 +/- 0.019

-0.011 +/- 0.082 0.009 +/- 0.017 26-C Co-60 Cr-51 Cs-134 Cs-137 Fe-59

-0.003 +/- 0.008

-0.004 +/- 0.083 0.002 +/- 0.007

-0.001 +/- 0.008 0.004 +/- 0.020 0.000 +/- 0.007 0.053 +/- 0.086

-0.004 +/- 0.006 0.005 +/- 0.007

-0.009 +/- 0.019 0.005 +/- 0.016

-0.100 +/- 0.180

-0.013 +/- 0.013 0.016 +/- 0.019 0.002 +/- 0.030 0.002 +/- 0.017 0.140 +/- 0.120 0.002 +/- 0.012

-0.004 +/- 0.014

-0.016 +/- 0.037 1-131 K-40 La-140 Mn-54 Nb-95 0.010+/-0.031 2.770 +/- 0.220 0.003 +/- 0.019 0.001 +/- 0.008 0.011 +/- 0.009 0.000 +/- 0.034 1.310 +/- 0.180 0.000 +/- 0.021

-0.003 +/- 0.007 0.002 +/- 0.011 0.001 +/- 0.026 0.890 +/- 0.390 0.025 +/- 0.025

-0.007 +/- 0.017 0.016 +/- 0.020

-0.025 +/- 0.026 2.670 +/- 0.480

-0.006 +/- 0.024 0.004 +/- 0.014

-0.010 +/- 0.016 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 06/26/08 LETTUCE 06/26/08 STRAWBERRIES

-0.004 +/- 0.008 0.002 +/- 0.073

-0.004 +/- 0.018 0.033 +/- 0.036

-0.011 +/- 0.027

-0.008 +/- 0.010

-0.016 +/- 0.075

-0.007 +/- 0.018 0.012 +/- 0.034

-0.012 +/- 0.019 3-46

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 12, Fruits & Vegetables (pCi/g)

Collection Location Date Isotope 26-C 09/03/08 APPLES 09/03/08 LETTUCE Ru-103 Ru-106 Sb-125 Th-228 Zn-65

-0.003 +/- 0.018 0.040 +/- 0.210

-0.035 +/- 0.048

-0.009 +/- 0.055 0.003 +/- 0.046

-0.008 +/- 0.015

-0.070 +/- 0.150

-0.013 +/- 0.042 0.009 -+/- 0.059

-0.003 +/- 0.038 Zr-95

-0,001 +/-+0.013 0.006 +/- 0.0 15 0.006 +/- 0.033 0.004 +/- 0.026 06/26/08 LETTUCE 06/26/08 STRAWBERRIES 09/03/08 APPLES 09/03/08 LETTUCE 3-47

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 13, Broadleaf Vegetation (pCi/g)

Collection Location Date Isotope 01 Ba-140 04/30/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 G

-0.015 +/- 0.033

-0.009 +/- 0.03 9 0.043 + 0.06 I

-0.044 +/- 0.089

-0.012 +/- 0.087 0.000 + 0.058 Cr-51

-0.140 +/- 0.210 0.040 0.210 0.130

+ 0.220

-0.100 +/- 0.250 0.170 +/- 0.250

-0.120 + 0.240 La-140

-0.015 +/- 0.033

-0.009 +/- 0.039 0.043 +/- 0.061

-0.044 +/- 0.089

-0.012 +/- 0.087 0.000 +/- 0.058 Th-228 Be-7 0.960 +/- 0.300 0.410 +/- 0.260 0.800 +/- 0.350 2.270 +/- 0.540 1.430 +/- 0.460 1.640 E 0.510 Cs-134

-0.008 +/- 0.018 0.009 +/- 0.017

-0.021 1 0.021

-0.015 +/- 0.023

-0.006 +/- 0.022 0.003 +/- 0.023 Mn-54

-0.006 +/- 0.023

-0.006 +/- 0.022

-0.016 +/- 0.028 0.020 +/- 0.030 0.014 +/- 0.031 0.001 +/- 0.035 Zn-65 Ce-1 41

-0.028 +/- 0.030 -

0.016 +/- 0.030 0.013 +/- 0.030 0.016 +/- 0.038

-0.013 +/- 0.029

-0.006 +/- 0.028 Cs-137

-0.003 + 0.024 0.019 + 0.026 0.000 + 0.027

-0.003 + 0.029 0.020 +/- 0.029

-0.005 +/- 0.033 Nb-95

-0.001 +/- 0.023 0.005 +/- 0.027

-0.015 +/- 0.038

-0.025 + 0.042 0.003 + 0.038

-0.002 + 0.034 Ce-144

-0.053 +/- 0.096 0.006 +/- 0.022 0.020 +/- 0.110 0.008 +/- 0.026

-0.010 +/- 0.094 0.003 + 0.030 0.100 +/- 0.110

.0.015 +/- 0.032

-0.062 +/- 0.092 0.006 +/- 0.034

-0.040 +/- 0.110 0.009 +/- 0.027 Co-58 Fe-59 0.002 +/- 0.050

-0.015 +/- 0.055 -

0.042 + 0.066 0.028 + 0.082 0.015 + 0.075

-0.051 +/- 0.080 Ru-103

-0.019 +/- 0.026

-0.006 +/- 0.019 0.007 +/- 0.029 0.017 +/- 0.027

-0.033 +/- 0.031 0.015 +/- 0.029 1-131

-0.004 + 0.00 1

-0.010 0.012 -

0.002 + 0.020 0.010 + 0.028 0.004 + 0.018 0.003 +/- 0.017 Ru-106 0.040 +/- 0.220 0.050 +/- 0.220 0.100:+/- 0.250

-0.030 +/- 0.330 0.250 +/- 0.230

-0.040 +/- 0.130 Co-60 0.024 +/- 0.027 0.007 +/- 0.026

-0.029 +/- 0.035

-0.030 +/- 0.036 0.013 +/- 0.034

-0.052 +/- 0.048 K-40 4.040 + 0.740 3.070 +/- 0.610 2.900 +/-0.810 3.240 + 0.920 3.150 + 0.800 2.800 + 1.100 Sb-125 0.015 +/- 0.060 0.015 :L 0.061 0.027 +/- 0.055 0.023 + 0.070 0.062 +/- 0.056 0.044 +/- 0.081 Zr-95 05/14/08 0.060 +/- 0.100

-0.032 + 0.065

-0.017 +/- 0.038 10 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 04/30/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08

-0.049 + 0.086 0.040 +/- 0.120 0.080 0.110

-0.070 + 0.120 0.110 0.140 Ba-140 G

0.000 +/- 0.041 0.035 +/- 0.046

-0.002 +/- 0.042 0.049 + 0.069

-0.012 +/- 0.097 0.000 +/- 0.032 Cr-51 0.120 0.110 0.013 + 0.070

-0.035 +/- 0.065

-0.042 + 0.075

-0.040 0.110 Be-7 0.530 +/- 0.320 0.560 +/- 0.360 0.600 +/- 0.220 1.330 +/- 0.380 1.830 +/- 0.480 1.030 +/- 0.380 Cs-134 0.022 + 0.036

-0.005 + 0.051 0.036 + 0.061

-0.007 + 0.059 0.023 + 0.048 Ce-141

-0.014 + 0.027 0.001 + 0.039

-0.008 + 0.024 0.009 + 0.036 0.007 + 0.035 0.011 + 0.030 Cs-137 Ce-144 Co-58 Co-60

-0.060 + 0.094

-0.019 + 0.020

-0.011 + 0.027

-0.070 +/- 0.140

-0.021 +0.037 -

-0.081 + 0.050 -

0.044 +/- 0.077 0.007 + 0.019 0.001 + 0.023

-0.040 +/- 0.110 -

-0.012 0.029 0.021 0.034 0.080 +/- 0.110 0.027 + 0.040

-0.028 + 0.046

,0.060 +/- 0.110

-0.019 + 0.023

-0.004 + 0.034 Fe-59 1-131 K-40 05/14/08

-0.080 +/- 0.180

-0.016 +/- 0.020

-0.009 +/- 0.025 0.033 + 0.060

-0.003 +/- 0.001 5.490 +/- 0.920 06/11/08

-0.180 +/- 0.240

-0.004 +/- 0.023 0.045 +/- 0.035

-0.036 + 0.075 0.022 + 0.028 3.260 +/- 0.890 07/16/08

-0.100 +/- 0.150 0.005 +/- 0.013

-0.012 +/- 0.020 0.004 0.041 0.014 + 0.030 4.100 +/- 0.670 08/20/08 0.030 +/- 0.300 0.018 + 0.022 0.026 + 0.024 0.008 0.065

-0.009 0.003 3.170 +/- 0.830 09/16/08

-0.040 +/- 0.290 0.004 +/- 0.025 0.007 +/- 0.029 0.010 0.100 0.011 0.022 15.500 1.700 10/14/08

-0.070 +/- 0.230 0.007 +/- 0.020

-0.018 + 0.025

-0.007 0.074 0.011 0.023 3.900 0.890 3-48

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 13, Broadleaf Vegetation (pCi/g)

Collection Location Date Isotope 10 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10114/08 La-140 0.000 +/- 0.041 0.035 +/- 0.046

-0.002 +/- 0.042 0.049 +/- 0.069

-0.012 +/- 0.097 0.000 +/- 0.032 Mn-54 0.010 0.021 0.016 +/- 0.037 0.016+0.019 0.025 + 0.025

-0.014+/- 0.036 0.012 +/- 0.022 Zn-65 Nb-95 Ru-103 Ru-106 Sb-125

-0.002 + 0.034 0.017 +/- 0.023

-0.060 +/- 0.220

-0,010 +/- 0.048

-0.004 +/-0.048 -

0.018 +/- 0.036

-0.040 +/- 0.270 0.067 +/- 0.087 0.003 +/-0.026 0.005+/-0.020 0.090 0,160 0,011 +/-0,048 0.010 +/- 0.037

-0.005 +/- 0.028

-0.050 +/- 0.240

-0.010 +/- 0.060 0.006 +/- 0.044

-0.009 +/- 0.035 -

-0.120 +/- 0.270 0.060 +/- 0.079 0.015 +/- 0.032 0.002 +/- 0.025 0.030 +/- 0.240

-0.010 +/- 0.065 Zr-95 Th-228 05/14/08

-0.010 +/- 0.084

-0.012 +/- 0.050

-0.023 +/- 0.045 06/11/08

-0.010 +/- 0.130 0.030 +/- 0.086 0.039 +/- 0.051 07/16/08 08/20/08 09/16/08 10/14/08 0.048 +/- 0.077 0.050

+/- 0.120

0. 130 +/- 0.150 0.100

+/- 0.140 17 Ba-140 04/30/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 G

0.047 +/- 0.049

-0.027 +/- 0.048

-0.025 +/- 0.073

-0.034 +/- 0.059

-0.016 +/- 0.087

-0.027 +/- 0.041 Cr-51

-0.080+/- 0.150 0.280 +/- 0.310

-0.190 +/- 0.260

-0.010 +/- 0.260 0.010 +/- 0.260

-0.120 +/- 0.190 La-140 0.047 +/- 0.049

-0.027 +/- 0.048

-0.025 +/- 0.073

-0.034 +/-- 0.059

-0.016 +/- 0.087

-0.027 +/- 0.041 Th-228 0.053 +/- 0.083 0.010+/- 0.130 0.206 +/- 0.099

-0.020 +/- 0.110 0.240 +/- 0.110 0.120

+/- 0.110

-0.023 +/- 0.052

-0.007 +/- 0.073

-0.076 +/- 0.081

-0.029 +/- 0.058 Be-7 0.680 +/- 0.300

0.430 +/- 0.300 0.910 +/- 0.360 1

1.340 +/- 0.430 1.550 +/- 0.380 2.030 +/- 0.450 Cs-134 0.005 +/- 0.017 0.023 +/- 0.027 0.024 +/- 0.022

-0.007 +/- 0.021

-0.007 0.018 0.013 +/- 0.030 Mn-54

-0.005 +/- 0.027 0.003 +/- 0.032 0.003 +/- 0.028 0.006 +/- 0.026

-0.017 +/- 0.028

-0.016 +/- 0.029 Zn-65 0.026 +/- 0.059

-0.066 +/- 0.085

-0.069 +/- 0.077

-0.085 +/- 0.068 0.008 +/- 0.066

-0.021 +/- 0.061 Ce-141 Ce-144 Co-58 0.000 +/- 0.037 0.002 +/- 0.046 0.003 +/- 0.059

-0.002 +/- 0.044 Co-60

-0.008 +/- 0.025

-0.008 +/- 0.074 0.012 +/- 0.027 0.000+/-0.040

-0.010+/-0.160-

-0.015+/-0.031

-0.031 +/- 0.035 0.080 +/- 0.100 0.003 +/-0.025 0.004 +/- 0.038 0.020 +/- 0.130

-0.002 +/- 0.029 0.021 +/- 0.039 0.000 +/- 0.100

-0.006 +/-0.028

-0.016 +/- 0.034

-0.030 +/- 0.110 0.002 +/- 0.024 Cs-137 Fe-59 1-131

-0.001 +/- 0.020

-0.026 +/- 0.058

-0.003 A: 0.001

-0.008 +/- 0.041 0.078 +/- 0.070

-0.009 +/- 0.014 -

0.001 +/-0.030 0.072 +/-0.065 0.004 0.014 0.005 +/- 0.031

-0.005 +/- 0.068 0.010 +/- 0.028 0.038 +/- 0.028

-0.010 +/- 0.065

-0.005 +/- 0.002

-0.009 +/- 0.026 0.012 +/- 0.038 0.026 +/- 0.032

-0.004 +/- 0.033

-0.008 +/- 0.040 0.002 +/- 0.03 I

-0.009 +/- 0.026 0.010 +/- 0.029

-0.003 +/- 0.024 K-40 3.610 +/- 0.840 3.910 +/- 0.960 3.840 +/- 0.790 2.730 +/- 0.680 3.420 +/- 0.680 2.490 +/- 0.660 Sb-125 0.004 +/- 0.051

-0.067 +/- 0.089

-0.018 +/- 0.064 -

0.008 +/- 0.056

-0.044 +/- 0.063 -

0.004 +/- 0.060 Nb-95 Ru-103 Ru-106 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 I0/14/08 05/14/08 06/11/08 07/16/08 08/20/08 09/16/08 10/14/08 0.019 +/- 0.026

-0.006 +/- 0.020 0.120 +/- 0.170

-0.015 +/- 0.036

-0.003 +/- 0.029 0.050 +/- 0.280

-0.032 +/- 0.032 -

-0.012 +/- 0.027 0.100 +/- 0.230 0.004 +/- 0.035 0.008 +/- 0.033 0.050 +/- 0.230 0.004 +/- 0.035

-0.008 +/- 0.031 -

0.140 +/- 0.220

-0.020 +/- 0.030 0.004 +/- 0,023

-0.090 +/- 0.230 Zr-95

-0.009 +/- 0.048 0.010 +/- 0.059 0.000 +/- 0.046

-0.049 +/- 0.053

-0.015 +/- 0.05 I 0.000 +/- 0.041 3-49

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental. Operating Report Millstone Station 2008 Table 14, Sea Water (pCi/L)

Collection Location Date Isotope 32 Ba-140 Be-7 Co-58 Co-60 Cr-5l Cs-134 01/29/08

-1.5 +/- 3.7 0.0 +/- 19.0

-0.1 +/- 2.0 0.2 +/- 2.0 80 +/- 19.0 1.3 2.0 02/26/08 2.6 + 5.1

-2.0 +/- 23.0 0.1 +/- 2.5 0.7 +/- 2.7 3.0 +/- 24.0 0.7 + 2.3 03/25/08

-5.2.+/- 5.5

-27.0 +/- 35.0

-1.3 +/-4.7 1.3 +/- 4.7 21.0+/- 38.0 1.9+/- 3.6 04/29/08 2.8 +/- 8.3 18.0:+/- 30.0 2.5 +/-3.7 2.1 +/- 4.0

-21.0 +/-29.0 0.2 +/-2.5 05/27/08 5.0 +/- 6.1 2.0 +/- 26.0

-2.5 +/- 2.9

1.4 +/- 3.3

-1.0 +/- 30.0

-0.1 +/- 3.0 06/24/08

-0.4 +/-6.0

-7.0 +/-21.0

-0.9 +/-2.6 0.1 +/- 2.5 7.0 +/-25.0 0.7 +/- 1.8 07/29/08

-5.1 +/- 7.6

-9.0 +/- 24.0

-1.8 - 2.9

-2.1 +/- 3.3

-7.0 +/- 26.0 2.0 +/- 2.1 08/26/08 2.5 +/- 7.7

-26.0 +/- 33.0 0.0 +/- 3.9

-3.4 +/- 5.0

-19.0 +/- 40.0

-1.8 +/- 2.8 09/30/08

-5.3 +/-6.8

-1.0 +/- 28.0

-1.6 +/-3.7

-1.0 +/- 4.8 26.0:+/- 36.0

-1.7 +/- 2.4 10/28/08

-2.0 +/-6.5 6.0 +/-21.0

-0.4:+/- 2.1 0.7 +/- 2.4

-21.0 +/- 22.0 1.1 +/- 2.4 11/25/08 5.8 +/- 8.9 15.0 +/- 28.0 0.3 +/- 3.4 0.8 +/- 4.4 16.0 +/- 28.0 1.2 +/- 3.3 12/30/08 0.5 +/-6.2 6.0 +/-27.0 2.6 +/- 3.5 0.0 +/- 3.4 14.0+/- 30.0 0.9 +/- 2.8 Cs-137 Fe-59 H-3 1-131 K-40 La-140 01/29/08

-1.0 +/- 1.9 0.7 +/- 4.6 730.0 +/- 270.0 1.7 +/- 4.1 248.0 +/- 48.0

-1.5 +/- 3.7 02/26/08

-0.6 +/- 2.7 5.7 +/- 5.7 350.0 +/- 180.0 0.5 +/- 5.2 299.0 +/- 62.0 2.6 +/- 5.1 03/25/08

-3.0 +/- 4.3

-5.7 +/- 9.4 640.0 +/- 190.0

-0.9 +/- 8.1 285.0 +/- 98.0

-5.2 +/- 5.5 04/29/08 2.7 +/- 3.8

-2.4 +/- 8.1 730.0 +/- 320.0 4.3 +/- 5.6 352.0 +/-93.0 2.8 +/- 8.3 05/27/08

-3.7 +/- 3.2

-2.5 +/- 6.4 180.0 +/- 380.0 0.2 +/- 5.7 254.0 +/-62.0 5.0 +/- 6.1 06/24/08 0.8 +/- 2.5 0.1 +/- 5.9

-30.0 +/- 170.0

-3.3 +/- 8.4 307.0 +/- 60.0

-0.4 +/- 6.0 07/29/08 3.3 +/- 3.0 5.2 +/- 6.2 280.0 +/- 170.0 0.0 +/- 6.5 248.0 +/- 75.0

-5. 1 +/- 7.6 08/26/08

-0.8 +/- 3.8 0.0 +/- 8.3 200.0 +/- 160.0

-5.2 +/- 6.3 330.0 +/- 100.0 2.5 +/- 7.7 09/30/08

-0.6+/-3.7 2.3+/-8.2 530.0+/- 180.0 0.8+/-6.2 293.0+/-91.0

-5.3+/-6.8 10/28/08 0.6 +/-2.4 2.2 +/- 5.6 1110.0+/-190.0 3.2 +/- 7.0 282.02+/--53.0

-2.0 +/-6.5 11/25/08 0.0 +/-4.3 6.6 +/- 8.8 610.0:+/- 180.0 2.7 +/- 7.4 270.0+/-88.0 5.8 +/-8.9 12/30/08 2.2 +/-3.2

-4.7 +/- 6.0 350.0 +/- 180.0

- 1.2 +/-: 6.9 228.0+/- 68.0 0.5 +/-6.2 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 Th-228 01/29/08 0.1 +/- 1.9

-0.2 +/- 2.2

-1.4 +/- 2.4

-14.0 +/- 19.0

-0.7 +/- 5.2 7.0 +/- 10.0 02/26/08 1.0 +/- 2.3

-1.6 +/- 2.7

-1.0+/-2.5

-29.0 +/- 26.0

-0.2:+/- 6.5

-9.0 +/- 11.0 03/25/08

-3.5 +/- 4.1 1.4 +/- 5.1

-3.1 +/- 5.0

-25.0 +/- 41.0

-3.0 +/- 11.0

-10.0 +/- 19.0 04/29/08

-1.7 +/- 3.5 0.2 +/- 4.6

-5.0 +/- 3.5 15.0 A: 29.0 2.7 +/- 9.1 7.0 +/- 14.0 05/27/08 0.9 +/- 3.2

-1.6 +/- 4.8 1.0 +/- 2.9 22.0 +/- 27.0 1.8 +/- 8.3

-13.0 +/- 12.0 06/24/08

-1.0+/- 2.4 1.7 +/- 3.5

-0.4 +/- 3.1 14.0 +/- 23.0

-1.3 +/- 5.5

-2.0+/- 11.0 07/29/08

-0.1 +/- 2.8

-1.1 +/- 3.3

-2.7 +/- 3.1 4.0 +/- 28.0 3.1 +/- 7.0 2.0+/- 14.0 08/26/08 1.1 +/-3.8

-1.5 +/- 5.0

-0.4 +/- 3.7

-24.0 +/-35.0 5.0 +/- 11.0 14.0+/- 16.0 09/30/08 0.0 +/- 3.4

-0.5 +/- 4.1 3.1 +/- 3.7

-17.0 +/- 32.0

-2.1 +/- 8.7 14.0 +/- 16.0 10/28/08

-0.6 +/-2.5

-1.5 +/- 2.9

-2.0 +/- 2.6

-9.0 22.0

-1.4 +/- 6.2 0.0+/- 10.0 11/25/08 0.8 +/-3.7 1.1 +/- 4.2

-2.5 +/- 3.8

-29.0 +/-33.0

-2.4 +/- 9.9

-5.0 +/- 15.0 12/30/08 0.2 +/- 2.9 1.7 +/- 3.7

-0.6 +/- 3.7,

12.0 +/- 32.0

-3.9 +/- 9.2 5.0 +/- 12.0 Zn-65 Zr-95 01/29/08 2.4:+/- 7.1 0.7 +/-3.9 02/26/08

-4.9 +/- 6.1

-0.2 +/- 4.4 03/25/08 0.0 +/- 11.0

-1.7 +/-5.8 04/29/08

-4.3 +/- 8.0 3.3 +/- 6.5 05/27/08 11.0+/- 14.0

-0.2 +/- 5.0 06/24/08

-2.2 +/-6.1

-0.8+/- 4.7 07/29/08 1.6 +/-6.9 3.8 +/- 5.2 08/26/08

-2.8 +/- 9.5

-3.6 +/- 7.4 09/30/08

-8.0 +/- 7.9

-6.7 +/- 7.4 10/28/08 5.6 +/- 8.5

-2.3 +/- 4.3 11/25/08 3.0+/- 12.0 1.9 +/-7.0 12/30/08 0.9+/- 7.4

-3.1 +/-5.3 3-50

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 14, Sea Water (pCi/L)

Collection Location Date Isotope 37-C Ba-140 02/26/08 06/03/08 09/02/08 12/09/08 02/26/08 06/03/08 09/02/08 12/09/08 02/26/08 06/03/08 09/02/08 12/09/08 02/26/08 06/03/08 09/02/08 12/09/08

-2.0 +/- 6.4 1.1 +/-4.1 2.7+/-6.8 3.1 +/-7.2 Cs-137 0.7 +/- 3.0 0.0 +/- 2.3 0.6+/- 4.4

-0.3 +/- 4.1 Mn-54

-2.1+/-3.0

-0.1 +/-2.2

-2.0 3.3

-1.2 +/-4.4 Zn-65

-1.8 +/- 6.8

-1.5 +/- 5.1

-6.0 16.0

-12.0+/- 11.0 Be-7 1.0+/- 25.0 4.0+/- 18.0

-5.0 34.0

-17.0 32.0 Fe-59 0.4 +/- 6.7 0.2 +/-4.6

-2.6 7.6

-3.5 8.2 Nb-95 1.9 + 3.4

-0.7 +/- 2.7 1.2 +/- 4.4

-0.9+/-5.0 Co-58 0.2+/- 3.1 0.6 +/- 2.3

-0.7 +/- 3.4 4.3 +/- 3.8 H-3

-20.0 +/- 180.0 110.0 +/- 390.0 140.0 +/- 170.0 30.0+/- 170.0 Ru-103 0.3 +/- 3.0

-0.4 +/- 2.2

-0.8 + 3.5

-3.5 +/- 3.9 Co-60

-0.9+/- 3.4 0.3 2.4

-3.7 +/-4.0 3.4 +/-3.7 1-131

-0.5 +/- 4.5

-1.1 +/-4.2 5.6+/- 7.3 2.2 +/- 6.0 Ru-106 8.0 +/-24.0 15.0 +/-20.0

-5.0+/- 31.0 4.0 +/- 34.0 Cr-51 8.0 +/- 23.0

-4.0 +/- 22.0 0.0 +/- 36.0 2.0 +/- 30.0 K-40 330.0 +/--79.0 214.0 +/- 52.0 246.0 +/- 83.0 181.0 + 87.0 Sb-1 25

-1.0+/- 8.2 1.9 - 6.2 6.2 +/- 9.3 2.5 +/- 9.6 Cs-134

-1.0 - 2.0 1.1 +/-1.9

-0.9 +/- 3.7 2.9 +/- 2.8 La-140

-2.0 +/- 6.4 1.1 4.1 2.7 +/- 6.8 3.1 +/-7.2 Th-228 13.0 +/- 12.0

-7.0 +/- 10.0 2.0 +/- 14.0

-1.0+/- 15.0 Zr-95 1.2 +/- 5.1 1.0 +/- 4.0 0.4 +/- 5.9 2.2 +/- 7.4 3-51

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 15, Bottom Sediment (pCi/g)

Collection Location Date Isotope 29-X 31 32 33 Ag-I10m 04/30/08

-0.035 +/- 0.050 10/23/08 0.005 - 0.036 Cs-137 04/30/08 0.007 +/- 0.053 0.002 10/23/08

+/- 0.043 Ru-103 04/30/08 0.026 +/- 0.041 10/23/08 0.012 +/- 0.043 Ag-ll0m 04/11/08

-0.003 +/- 0.017 10/23/08 0.020 E 0.039 Cs-137 04/11/08

-0.005 +/- 0.019 10/23/08 0.000 +/- 0.047 Ru-103 04/11/08

-0.003 - 0.025 10/23/08 0.004 + 0.064 Ag-110m 04/30/08

-0.039 +/- 0.042 10/23/08

-0.024 +/- 0.030 Cs-137 04/30/08

-0.009 - 0.049 10/23/08 0.025 +/- 0.034 Ru-103 04/30/08

-0.011 +/- 0.047 10/23/08

-0.010 +/- 0.033 Ag-I10m 04/11/08

-0.014 +/- 0.030 10/23/08

-0.043 +/- 0.050 Cs-137 04/11/08 0.012 +/- 0.030 10/23/08 0.001 +/- 0.050 Be-7 0.100 +/- 0.410 0.000 +/- 0.340 Fe-59 0.030+/-0.110 0.042 +/- 0.090 Ru-106 0.210 +/- 0.470 0.000 +/- 0.320 Be-7 0.100 +/- 0.170 0.220 +/- 0.430 Fe-59

-0.022 +/- 0.048

-0.030 +/- 0.120 Ru-106

-0.090 +/- 0.190 0.260 +/- 0.420 Be-7

-0.040 +/-- 0.360 0.300 +/- 0.280 Fe-59 0.082 +/- 0.097

-0.043 +/- 0.087 Ru-106

-0.260 +/- 0.430

-0.020 +/- 0.270 Be-7 0.040 +/- 0.300

-0.040 - 0.360 Fe-59 0.056 +/- 0.095

-0.080 +/- 0.150 Co-58 Co-60 Cr-51 Cs-134 0.020 +/- 0.045

-0.011 +/- 0.067

-0.260 +/- 0.460

-0.018 +/- 0.081

-0.030 - 0.039 0.025 L 0.042

-0.140 +/- 0.380 0.015 +/- 0,026 1-131 K-40 Mn-54 Nb-95

-0.031 +/- 0.076 -

17.300 +/- 2.000

-0.025 :E 0.041

-0.047 +/-- 0.049 -

0.040 +/- 0.180 18.000 +/- 1.500 0.000 +/- 0.039 0.028 +/- 0.050 Sb-125 Th-228 Zn-65 Zr-95

-0.080 +/-E 0.120 1.190- 0.250

-0.160+/-0.140

-0.013 -0.080 0.045 +/- 0.085 1.170 +/- 0.160 0.100+/--0.180 0.035 -0.069 Co-58 Co-60 Cr-51 Cs-134

-0.012 +/- 0.020

-0.012 L 0.019

-0.300 +/- 0.220

-0.009 4 0.064

-0.008 +/- 0.044 0.018 +/- 0.038 0.310 +/- 0.560 0.032 +/- 0.044 1-131 K-40 Mn-54 Nb-95

-0.025 +/- 0.056 18.630 +/- 0.790

-0.002 + 0.021

-0.015 +/- 0.027

-0.070 +/- 0.220 16.100 +/- 1.700 0.048 +/- 0.051

-0.042 +/- 0.062 Sb-125" Tb-228 Zn-65 Zr-95 0.008 +/- 0.050 1.681 +/- 0.092 0.040 + 0.084 0.038 +/-- 0.039 0.000 +/- 0.110 1.440 +/- 0.210

-0.130+/-0.120

-0.001 +/- 0.099 Co-58 Co-60 Cr-51 Cs-134 0.013 +/-0.041 0.025 - 0.044 0.160+/- 0.410

-0.015 0.042

-0.045 +/- 0.034

-0.002 +/- 0.034 0.200 +/- 0.290 0.017 +/- 0.037 1-131 K-40 Mn-54 Nb-95

-0.028 +/- 0.072 14.900 +/-E 1.700 0.006 +/- 0.043 0.002 +/- 0.055 0.100 +/- 0.130 15.400 +/- 1.200

-0.020 +/-0.034

-0.011 +/- 0.045 Sb-125 Th-228 Zn-65 Zr-95 0.100 +/- 0.110

,0.870 +/- 0.200 0.000 +/- 0.210

-0.049 +/- 0.065 0.031 +/- 0.075 1.190 -0.130

-0.070 +/-0.150 0.034 +/- 0.052 Co-58 Co-60 Cr-51 Cs-134

-0.010 +/- 0.036 -

0.021 +/- 0.046

-0.070 +/- 0.280 -

0.017 +/- 0.029 0.076 +/- 0.056

-0.015 :L 0.046 0.080 +/- 0.360 0.004 +/- 0.040 1-131 K-40 Mn-54 Nb-95

-0.022 +/-: 0.089 12.800 +/- 1.500 0.035 +/- 0.035 0.012 +/- 0.047 0.050 +/- 0.180 17.600 +/- 2.300 0.010 +/- 0.046 0.002 +/- 0.054 3-52

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 15, Bottom Sediment (pCi/g)

Collection Location Date Isotope 33 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 04/I 1/08 0.005 +/- 0.035 0.020 + 0.260 0.029 +/- 0.084 0.520 +/- 0.170 0.050 +/- 0.190

-0.047 +/- 0.063 10/23/08 0.020 +/- 0.053

-0.070E 40.400

-0.040 +/- 0.110 0.030+/-1 0.190 0.020 4- 0.150

-0.006 0.075 34 Ag-In0m Be-7 Co-58 Co-60 Cr-51 Cs-134 04/11/08 0.001+/-0.0350.018 0.110+/-0.260

-0001 +/- 0.033

-0.004+/-0.038 0.0605+/-0.330 0.0224+/-0.049 10/23108

+/- 0.034 0.200 0.310 0.039 +/- 0.037 0.021 +/- 0.032

-0.180 +/- 0.350

-0.002 +/- 0.023 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 04/11/08

-0.0.12 +/- 0.038

-0.008 +/- 0.077 0.099 +/- 0.090 t 15.300 +/- 1.700 0.016 +/- 0.028

-0.003 +/- 0.040 10/23/08 0.030+/-0.037 0.0274+/-0.076 0.1004+/-0.150 13.400+/- 1.500 0.003+/-0.027 0.019+/--0.044 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 04/11/08 0.012 +/- 0.034

-0.210 +/- 0.270

-0.056 +/- 0.068 0.170 +/- 0.210

-0.104 +/- 0.092

-0.071 +/- 0.058 10/23/08

-0.008 +/- 0.038 0.150 +/- 0.250 0.000 +/- 0.070 0.100 +/- 0.140

-0.072 +/- 0.094 0.005 +/- 0.050 35-X Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 04/14/08

-0.012 0.059 0.330 +/- 0.500

-0.007+/-+ 0.052 0.039 +/- 0.065 0,420 +/- 0.580 0.018 +/- 0.053 10/23/08

-0.041 +/- 0.032

-0.050 +/- 0.280 0.000 +/- 0.031 0.000 +/- 0.028 0.200 +/- 0.370 0.011 +/- 0.041 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 04/14/08 0.054 +/- 0.072 0.037

-0.030 +/- 0.120 0.070 +/- 0.120 14.300 +/-= 2.300

-0.022 +/- 0.056 0.008 +/- 0.073 10/23/08

+/-0.035

-0.035 +/- 0.095

-0.020 +/- 0.130 14.800 +/- 1.200 0.009+/- 0.030 0.014 +/- 0.066 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 04/14/08 0.010 +/- 0.059

-0.190 +/- 0.450

-0.050 +/- 0.160 1.060 +/- 0.330

-0.200 +/- 0.140

-0.040 +/- 0.100 10/23/08 0.020 +/- 0.035 0.120 +/- 0.280

-0.012 : 0.083 1.020 +/- 0.130

-0.090 +/- 0.160 0.038 +/- 0.061 37-C Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 04/11/08 0.004 +/- 0.040 0.300 +/- 0.380

-0.007 +/- 0.034 0.002 +/- 0.057 0.100 +/- 0.410 0.008 +/- 0.064 10/23/08

-0.009 +/- 0.031

-0.340 +/- 0.410

-0.019 +/- 0.037 0.017 +/- 0.030

-0.250 +/- 0.350 0.011 +/- 0.039 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 04/11/08 0.013 +/-: 0.048

-0.010 +/- 0.110 0.120 +/- 0.130 17.200 +/- 2.300 0.014 +/- 0.037

-0.016 +/- 0.052 10/23/08 0.006 +/- 0.035 0.020 +/- 0.100 0.100 +/- 0.160 15.400 +/- 1.600 0.000 +/- 0.033

-0.035 +/- 0.050 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 04/11/08 0.044+/- 0.042

-0.110 +/-0.400 0.050+/- 0.110 0.310 +/-0.180

-0.110+/-0.110

-0.050 +/-0.054 10/23/08

-0.001 +/- 0.042

-0.360 +/- 0.270

-0.020 +/- 0.100 0.120 +/- 0.180 0.120 +/- 0.170

-0.019 +/- 0.056 3-53

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 15, Bottom Sediment (pCi/g)

Collection Location Date Isotope 39-X' 67-X 69-X Ag-ll0m 05/07/08

-0.007 +/- 0.029 10/24/08

-0.010 +/- 0.061 Cs-137 05/07/08 0.082 +/- 0.030 10/24/08 0.147 +/- 0.062 Ru-103 05/07/08

-0.019 +/- 0.022 S10/24/08 0.043 +/- 0.063 Ag-Il0m 04/11/08

-0.007 + 0.044 10/29/08

-0.062 +/- 0.059 Cs-137 04/11/08 0.169 +/- 0.081 10/29/08 0.218 +/- 0.066 Ru-103 04/11/08 0.007 +/- 0.072 10/29/08

-0.038 +/- 0.072 Ag-ll0m 04/11/08 0.005 +/- 0.053 10/23/08

-0.039 +/- 0.041 Cs-137 04/11/08

-0.008 + 0.069 10/23/08 0.023 +/- 0.038 Ru-103 04/11/08

-0.020 +/- 0.039 10/23/08 0.010 +/- 0.045 Be-7 Co-58 0.270 +/- 0.270

-0.004 + 0.019 0.050 +/- 0.450

-0.024 +/- 0.056 Fe-59 1-131 0.014: +/-0.048

-0.001 +/-0.033 -

0.110+/-0.160 0.230+/-0.640 Ru-106 Sb-125

.0.090+/-0.180 0.010 0.053 0.530+/-0.410

-0.010+0.120 Be-7 Co-58

-0.150+/-0.650

, -0.006+/-0.050 0.960 +/- 0.600

-0.043 +/- 0.053 Fe-59 1-131

-0.080 +/- 0.120

-0.260 +/- 0.430 0.050*+/- 0.130

-0.080 + 0.440 Ru-106 Sb-125 0.050 +/- 0.540 0.100+/-0.150

-0.050 +/- 0.390 0.070 +/- 0.120 Be-7 Co-58 0.080 0.510 0.019 +/- 0.073 0.470 +/- 0.400

-0.002 +/- 0.050 Fe-59 1-131

-0.140 +/- 0.200

-0.070 +/- 0.180 0.140 +/- 0.140

-0.030 +/- 0.220 Ru-106 Sb-125 0.480 +/- 0.560 0.080 +/- 0.160 0.170 +/- 0.400 0.056 +/- 0.099 Co-60 Cr-51 0.022+/- 0.022 0.010 +/-0.180 0.049 +/- 0.057

-0.250 +/- 0.580 K-40 Mn-54 17.260 +/- 0.890 0.006 + 0.022 19.800 +/- 1.800 0.022 + 0.049 Th-228 Zn-65 0.695 +/- 0.084 0.035 +/- 0.094 1.010 +/- 0.190 0.140 +/- 0.230 Co-60 Cr-51

-0.082 +/- 0.079

-0.360 +/- 0.710 0.021 +/- 0.037

-0.080 +/- 0.700 K-40 Mn-54 17.400 +/- 2.500 0.004 +/- 0.073 17.000+/-: 1.600

-0.011 +/- 0.046 Th-228 Zn-65 0.830 + 0.290

-0.200 + 0.170 1.280+/-0.210 0.130+/-0.210 Co-60 Cr-51 0.073 + 0.081 0.070 +/- 0.610

-0.039 + 0.044 0.210 +/- 0.510 K-40 Mn-54 15.200+/- 3.100

-0.016+/-0.048 16.600 +/- 2.200

-0.030 +/- 0.037 Th-228 Zn-65 0.360 +/- 0.370

-0.050 +/- 0.180 0.080+/-0.200

-0.110+/- 0.130 Cs-134

-0.0l I +/- 0.080 0.016 +/- 0.047 Nb-95 0.017 +/- 0.028

-0.075 +/- 0.083 Zr-95

-0.005 +/- 0.039 0.023 +/- 0.088 Cs-134

-0.001 +/- 0.052

-0.015 +/- 0,035 Nb-95 0,030 +/- 0.110 0.057 +/- 0.081 Zr-95

-0.090 +/- 0.120

0. 116 0.096 Cs-134 0,008 +/- 0.067 0,030 +/- 0.037 Nb-95

-0.003 +/- 0.079

-0.020 +/- 0.055 Zr-95

-0.020 +/- 0.110

-0.071 +/- 0.066 3-54.

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 16, Aquatic Flora - Fucus (pCi/g)

Collection Location Date Isotope 29-X Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 02/12/08

-0.001 +/-0.011 0.190+/-0.l00 0.001 0.008 0.002+/--0.009 0.003+/--0.067 0.001 +/- 0.008 05/28/08 0.000+/- 0.016 0.130 +/-0.110

-0.005 +/-0.011

-0.011 +/- 0.015 -

-0.073 +/- 0.082 -

0.003 +/- 0.008 08/07/08

-0.013 0.014 0.180 -0,110 0.000 -0.012 0.003 +/-0.012 0.033 +/- 0.093

-0.003- 0.007 11/24/08 0.000+/-0.018 0.110+/-0.120

-0.001-0.011 0.009+/-0.016 0.038+/-0.097 0.002-0.011 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 02/12/08 0.006 +/- 0.008 0.003 +/- 0.024 0.012 +/- 0.016 5.180 + 0.410 0.003 +/- 0.008

-0.002 +/- 0.010 05/28/08

-0.001 +/--0.010

-0.014 +/- 0.034 0.011 +/--0.016 6.120+/--0.660

-0.004+/-0.014 0.000+/-0.013 08/07/08 0.001 +/- 0.010 0.003 0.006 +/- 0.032 0.050 +/- 0.040 5.450 +/- 0.590 0.006 +/- 0.010 0.002 +/- 0.015 11/24/08

+/- 0.013 0.010 +/- 0,038 0.009 +/- 0.020 7.290 +/- 0.790 0.004 +/- 0.011 0.003 +/- 0.015 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 02/12/08 0.000 - 0.008

-0.006 +/- 0.073

-0.005 +/- 0.018 0.083 +/- 0.037

-0.032 +/- 0.024 0.004 + 0.015 05/28/08

-0.004 +/- 0.010

-0.070 +/- 0.099 0.013 +/- 0.025 0.065 +/- 0.051 0.012 +/- 0.031

-0.001 +/- 0.020 -

08/07/08

-0.002 0.012

-0.008 +/- 0.083 0.011 +/- 0.021 0.035 :L 0.042 0.005 +/-0.026 0.009 +/- 0.023 11/24/08 0.003 -0.011

-0.040 +/- 0.110 0.003 +/- 0.025 0.032 +/- 0.068

-0.017 +/-0.037 0.009 +/- 0.019 32-X Ag-ll0m Be-7 Co-58 Co-60 Cr-51 Cs-134

02/12/08

-0.002 +/- 0.009 0.136 +/- 0073

-0.003 +/- 0.006

-0.001 +/-0.007 0.036 +/- 0.049 0.003 +/- 0.004 05/28/08 0.016 +/- 0.020 0.003 0.100+/- 0.110 0.008 +/- 0.614 0.010 0.016 0.020 +/- 0.110 0.015 +/-0.013 08/08/08

+/-0.020 0.110+/--0.110 0.010+/--0.014 0.001 0.016 0.001 +/--0.087 0.010+/--0.007 11/24/08 0.008 +/- 0.022 0.110 +/- 0,120 0.003 +/- 0.016 0.000 - 0.016

-0.069 +/- 0.089 0.000 +/- 0.011 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 02/12/08 0.002 +/- 0.006

-0.012 +/- 0.018 0.012 - 0.013 5.830 +/- 0.340 0,001 +/- 0.011 0.000 +/- 0.008 05/28/08

-0.016 +/- 0.016

-0.037 +/- 0.041 0.007 +/- 0.022 8.530 +/- 0.780 0.007 +/- 0.012 0.006 - 0.013 08/08/08

-0.006 +/- 0.011 01030 +/- 0.042 0.086 +/- 0.063

'5.450 +/- 0.740

-0.004 +/- 0.013 0.0 13 +/- 0.022 11/24/08

-0.023 +/- 0.018 0.014 +/- 0.043

-0.007 - 0.024 7.220 +/- 0.770

-0.003 +/- 0.011

-0.003 +/- 0.016 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95

.02/12/08 0.004 +/- 0.007

-0.014 +/- 0.053

-0.008 +/- 0.014 0.042 +/- 0.032

-0.014 +/- 0.019 0.005 +/- 0.011 05/28/08 0.012 +/- 0.014 0.040 4:0.110 0.004 +/- 0.024 0.000 +/- 0.059

-0.014 +/- 0.042

-0.008 +/- 0.023 -

08/08/08

-0.002 +/- 0.015 0.039 +/- 0.094 0.024 +/- 0.024 0.021 +/- 0.058 0.004 +/- 0.040 0.017 +/- 0.023 11/24/08

-0.004 +/- 0.011

-0.010 +/- 0.110

-0.014 +/-0.025 0.035 - 0.054

-0.027 +/- 0.038 0.012 +/- 0.022 33-X Ag-1r0m Be-7 Co-58 Co-60 Cr-51 Cs-134 02/12/08

-0.010 +/- 0.014 0.045 +/- 0,088 0.003 +/- 0.011

-0.002 - 0.010

-0.020 +/- 0.064

-0.005 + 0.007 05/28/08

-0.018 - 0.015 0.026 - 0.089 0.003 +/- 0.010 0.009 - 0.016 0.006 +/- 0.074

-0.002 +/- 0.008 08/08/08

-0.020 - 0.023 0.200 - 0,180 0.010 +/- 0.023 0.008 - 0.017

-0.190 +/- 0.170 0.003 +/- 0.009 11/25/08

-0.009 - 0.017 0.100 +/- 0,100 0.007 +/- 0.010

-0,009 +/- 0.017 0.052 +/- 0.091

-0.003 +/- 0.010 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 02/12/08 0.002 +/- 0.009 0.012

-0.003 +/- 0.029 0.041 +/- 0.024 5.390 +/- 0.590

-0.002 +/- 0.011 0.003 - 0.013 05/28/08

+/- 0.011 0.005 - 0.030

-0.002 +/- 0.015 6.410 : 0.640 0.005 -0.013

-0.005 0.012 08/08/08

-0.005 +/- 0.019 0.073 0.054 0.081 +/- 0.078 6.500 +/- 1.100 0.004 0.019 0.006 +/-0.019 11/25/08

-0.002 +/- 0.012

-0.004 +/- 0.029 0.012 +/- 0.023 5.970 +/- 0.760 0.000 +/- 0.011 0.002

.0.012 3-55

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 16, Aquatic Flora - Fucus (pCi/g)

Collection Location Date Isotope 33-X Ru-103 Ru-106 Sb-125 02/12/08 05/28/08 08/08/08 11/25/08

-0.002 +/- 0.009 0.070 +/- 0.084 0.015 +/- 0.023 0.007 +/- 0.009 0.013

-0.008 +/- 0.069 0.000 +/- 0.021

+/-0.021

-0.040+0.140 0.005+0.026 0.005 +/- 0.012

-0.030 +/- 0.120

-0.009 +/- 0.028 35-X 02/12/08 05/28/08 08/08/08 11/24/08 02/12/08 05/28/08 08/08/08 11/24/08 02/12/08 05/28/08 08/08/08 11/24/08 Ag-I 10m

-0.001 +/- 0.015

-0.014 + 0.012

-0.009 +/- 0.024 0.008 + 0.017 Be-7 Co-58 0.230+/-0.120 0.014+0.014 0:130 +/- 0.110

-0.001 0.011 0.310 +/- 0.240

-0.007 + 0.019 -

0.030+0.120 0.011+0.017 Cs-137 Fe-59 1-131 Th-228 0.064 + 0.046 0.066 +/- 0.051 0.009 +/- 0.085 0.011 +/- 0.057 Co-60 0.002 + 0.015

-0.002 +/- 0.01 1 0.000 + 0.017

-0.003 + 0.016 K-40 6.760 + 0.740 6.310 + 0.510 4.890 +/- 0.780 6.290 +/- 0.840 Th-228 0.049 +/- 0.049 0.057 + 0.036 0.043 + 0.066 0.072 +/- 0.055 Co-60 Zn-65

-0.013 +/-0.030 0.016 +/- 0.019

-0.049 +/- 0,032 -

(0.023 +/- 0,021 0.029 + 0,060 0.006 +/- 0.040 0.000 +/- 0.032 0.005 + 0.021 0.009 + 0.079 0.001 +/- 0.008

-0.048 + 0.076

-0.003 +/- 0.008 0.000 0.160

-0.001 + 0.012 -

-0.140+0:100 0.001 +/- 0.011 Zr-95 Cr-51 Cs-134 Mn-54 Nb-95 0.011 +/- 0.013 0.003 +/- 0.009

-0.006 +/- 0.014 0.010+/- 0.014

-0.027 + 0.031 0.014 +/- 0.023 0.008 +/- 0.025 0.008 + 0.019 0.013 +/- 0.053 0.079 +/- 0.074

-0.054 +/- 0.043 0.003 + 0.028 Ru-103 Ru-106 Sb-125

-0.012 + 0.011 0.000 + 0.099

-0.002 +/- 0.0.31 0.004 + 0.009 0.008 0.018 + 0.079 0.012 + 0.021

+/- 0.013 0.000 +/- 0.140

-0.031 +/- 0.032

-0.007 + 0.012

-0.020 + 0.140

-0.003 +/- 0.034 0.000 +/- 0.013 0.006+ 0.012 0.009 + 0.010

-0.001 +/- 0.011 0.006 + 0.016 0.011 +/- 0.023

-0.009 +/- 0.017

-0.004 +/- 0.012 Zn-65 Zr-95 0.010 0.033 0.010+1-0.019

-0.031 + 0.029 0.003 +/- 0.015 0.003 + 0.030 0.013 + 0.031 0.014 + 0.057 0.024 +/- 0.023 36-X 02/12/08 05/28/08 08/07/08 11/25/08 02/12/08 05/28/08 08/07/08 11/25/08 02/12/08 05/28/08 08/07/08 11/25/08 Ag-lrnm 0.003 +/- 0.007

-0.008 + 0.027 0.014 0.016 0.003 + 0.015 Be-7 Co-58 Cr-51 0.165 E 0.059 0.002 - 0.005 0.190 +/- 0.150 0.001 +/- 0.019 0.200 +/- 0.160 0.007 +/- 0.014 0.130 +/- 0.110

-0.003 +/- 0.012 Cs-134

-0.003 + 0.005

-0.016 +/- 0.049 0.005 +/- 0.005

-0.011 + 0.014 -

-0.030 0.110 -

0.003 +/- 0.010 0.007 +/- 0.014 0.060 + 0.160

-0.006 +/- 0.009

-0.006 +/- 0.013 0.014 +/- 0.077 0.001 +/- 0.008 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 0.001 0.005 0.004 + 0.014 0.013 + 0.014 0.001 +/-0.015 0.005 0.031 +/- 0.050 0.014+/-0.026

+ 0.014

-0.026 + 0.048

-0.005 +/- 0.066

-0.002+/-0.010 0.015+0.031 0.002 +/- 0.019 4.490 + 0.270

-0.003 +/- 0.005

-0.001 +/- 0.006 5.600 + 0.760

-0.017 +/- 0.018

-0.010 +/- 0.024 6.380 + 0.750 0.010 + 0.015 0.014 + 0.019 5.850 +/- 0.610

-0.007 +/- 0.011.

-0.009 1 0.012 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95

-0.004 +/- 0.005

-0.025 +/- 0.047

-0,002 + 0.013 0.056 + 0.024

-0.013 +/- 0.016

-0.001 + 0.009 0.001 +/- 0.015 0.007 0.090 + 0.120

-0.003 + 0.036-0.038 + 0.075.

-0.030 +/- 0.100

-0.012 + 0.031

+ 0.015

-0.050 + 0.100 0.011 + 0.038

-0.010 + 0.070 0.002 + 0.041 0.010 + 0.027 0.002 0.010 0.030 + 0.096

-0.011 0.023 0.064 + 0 057

-0 001 +0026 0 014 + 0 022 3-56

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 16, Aquatic Flora - Fucus (pCi/g)

Collection Location Date Isotope 90-C 02f12/08 05/28/08 08/08/'08 1 1/25/08 Ag-I lOm

-0.003 +/- 0.004

-0.005 +/-0.020

-0.010 0.03 I

-0.006 +/- 0.013 Be-7 Co-58 Co-60 Cr-51 Cs-134 0.162 +/- 0.039 70.003 +/- 0.003 -

-0.002 +/- 0.003 -

-0.022 0.035 0.002 +/-0.003 0.1504.0.130 0.007+/-0.012 0.001 +/-0.018 0.080 0.110 0.019+/-0.016 0.120 +/- 0.200

-0.008 +/- 0.023

-0.002 +/- 0.025

-0.070 +/- 0.210

-0.019 +/- 0.016

-0.031 +/- 0.094 0.008 +/- 0.009 0.008 +/- 0.010 0.085 +/-0.083 0.004:+/- 0.007 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 02/12/08 0.003 +/- 0.003 0.004 +/- 0.009 0.040 +/- 0.018 5.730 -: 0.160

-0.001 +/- 0.003 0.000 +/- 0.004 05/2808

-0.007 +/- 0.015 0.000 +/- 0.031 0.029 +/- 0.026 7.220 +/- 0.730 0.007 +/- 0.014 0.007 +/- 0.016 08/08/08

-0.009 +/- 0.019

-0.019 +/- 0.055

-0.011 +/-0.098 5.400 +/- 1.000 0.011 +/-0.017 -

0.007 +/-0.025 11/15/08 0.001 +/- 0.009 0.012 +/- 0,025 0.012 +/- 0.017 5.730 +/- 0.550 0.002 +/- 0.010

-0.009 +/-0.011 02/12/08 05/28/08 08/08/08 11/25/08 Ru-103 0.000 +/- 0.003 0.001 +/- 0.011 0.000 +/- 0.016

-0.007 +/- 0.010 Ru-106 Sb-125 Th-228 Zn-65 Zr-95

-0.015 +/- 0.028

-0.002 +/-0.008 0.071 +/- 0.012

-0.007 +/-0.009 0.002 +/- 0.006

-0.070 +/- 0.110 0.040 +/- 0.032 0.055 +/- 0.061 0.030 +/- 0.074 0.003 +/- 0.023 0.120 +/-0.180

-0.018 +/-0.044 -

0.140 +/- 0.110 0.034+/- 0.042

-0.003 +/-0.032

-0.023 +/- 0.099 0.014 +/- 0.022 0.059 +/- 0.044

-0.024 +/- 0.031 0.015 +/- 0.017 3-57

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 17-A, Fish - Flounder (pCi/g)

Collection Location Date Isotope 32 03/30/08 04/29/08 08/05/08 10/16/08 04/29/08 08/05/08 10/16/08 04/29/08 08/05/08 10/16/08 Ag-110m H

0.005 +/- 0.034 0.011 +/- 0.034 0.010 +/- 0.036 Cs-1 37

-0.004 +/- 0.034

-0.008 +/- 0.028 0.028 +/- 0.029 Ru-103 0.007 + 0.027

-0.006 _ 0.023

-0.004 + 0.025 Ag-110m H

0.000 +/- 0.024 0.007 +/- 0.022 0.027 +/- 0.047 Cs-137 0.013 +/- 0.028 0.011 +/- 0.025 0.001 +/- 0.031 Be-7 Co-58 Co-60 Cr-51 Cs-1 34

-0.010 +/- 0.210 0.003 + 0.021 0.000 +/- 0.026 0.190 +/- 0.220 0.006 + 0.020

-0.020 +/- 0.210

-0.016 + 0.022 0.000 +/- 0.020 0.190 +/- 0.200

-0.006 +/- 0.017

-0.090 +/- 0.240 0.001 +_0.034 0.004 +/- 0.036 0.180 _0.260

-0.002 +0.019 Fe-59 1-131 K-40 Mn-54 Nb-95 0.002 +/- 0.060 0.008 _ 0.050 4.170 +/- 0.980 0.010 +/- 0.025

-0.004 +/- 0.027 0.014 +/- 0.051

-0.039 + 0.045 4.610 +/- 0.880 0.010 +/- 0.023

-0.003 +/- 0.026 0.000 +/- 0.058 0.032 + 0.060 3.600 +/- 1.100 0.011 +/- 0.028

-0.025 +/- 0.038 Ru-106 Sb-125 Th-228 Zn-65 Zr-95

-0.320 +/- 0.270 0.053 +/- 0.068

-0.010 + 0.090 0.028 + 0.058 0.024 +/- 0.041

-0.110 +/- 0.240 0.068 +/- 0.059 0.007 _ 0.088

-0.007 + 0.057 0.005 +/- 0.041 0.070 +/- 0.170

-0.032 +/- 0.072 0:055 0.087 0.011 _ 0.082 0.045 +/- 0.059 35 Be-7 Co-58 Co-60 Cr-51 Cs-134 03/30/08 04/15/08 09/02/08 10/16/08 04/15/08 09/02/08 10/16/08 04/15/08 09/02/08 10/16/08 0.020 +/- 0.190 0.011 +/- 0.025 0.007 +/- 0.026

-0.050 +/- 0.210 0.004 +/- 0.018 0.070 +/- 0.220

-0.005 _ 0.025

-0.003 +/- 0.028

-0.120 +/- 0.220 0.009 +/- 0.015 0.060 +/- 0.200 0.009 _ 0.034

-0.012 + 0.048 0.110 +/- 0.310

-0.015 +/- 0.021 Fe-59 1-131 K-40 Mn-54 Nb-95

-0.021 +/- 0.061

-0.023 +/- 0.036 3.390 +/- 0.780 0.013 +/- 0.022

-0.014 +/- 0.028

-0.019 +/- 0.052

-0.017 +/- 0.036 3.860 +/- 0.790

-0.012 +/- 0.022 0.009 +/- 0.026

-0.012 +/- 0.082 0.000 +/- 0.079 3.900 +/- 1.100

-0.004 +/- 0.032

-0.030 +/- 0.041 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 0.001 +/- 0.022 0.017 +/- 0.022

-0.020 +/- 0.029 0.070 + 0.240 0.017 +/- 0.055

-0.034 +/- 0.096 0.020 +/- 0.062 0.019 +/- 0.038

-0.040 - 0.210

-0.030 +/- 0.049 0.044 +/- 0.074

-0.010 +/- 0.064 0.009 +/- 0.039

-0.080 - 0.280 0.043 +/- 0.082 0.010 +/- 0.110

-0.047 + 0.082

-0.026 +/- 0.054 3-58

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 17-B, Fish - Other (pCi/g)

Collection Location Date Isotope 32 Ag-1 10mn Be-7 Co-58 Co-60 Cr-51 03/30/08 06/13/08 07/16/08 10/06/08 06/13/08 07/16/08 10/06/08 06/13/08 07/16/08 10/06/08 06/13/08 07/16/08 10/06/08 FISH-OTHER BLUEFISH TAUTOG TAUTOG BLUEFISH TAUTOG TAUTOG BLUEFISH TAUTOG TAUTOG BLUEFISH TAUTOG TAUTOG FISH-OTHER TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG TAUTOG H

0.004 +/- 0.039

-0.030 +/- 0.240

-0.003 +/- 0.029 0.036 +/- 0.040 0.200 +/- 0.230

-0.020 +/- 0.034 0.090 +/-0.180 0.011 +/-0.023

-0.026 +/- 0.035 0.140 +/- 0.210

-0.006+/-0.012 0.120:F 0.190

-0.019+/-0.032 0.011+/-0.041 0.010+/-0.170 Cs-134 Cs-137 Fe-59 1-131 K-40 35 03/30/08 05/30/08 07/16/08 10/06/08 05/30/08 07/16/08 10/06/08 05/30/08 07/16/08 10/06/08 05/30/08 07/16/08 10/06/08 0.015 +/- 0.015 0.009 +/- 0.029

-0.027 +/- 0.076 0.004 +/- 0.063 3.700 +/- 1. 100 0.007 +/- 0.021

-0.021 +/-0.031 0.029 +/-0.053

-0.022 0.039 3.340 +/- 0.830 0.005 +/- 0.018 0.013 0.031 0.000 +/-0.057

-0.016 0.047 4.100 +/- 1.200 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125

-0.025 +/- 0.032 -

-0.002 +/- 0.028 -

0.000 +/- 0.027

-0.080 + 0.250 -

0.018 +/- 0.058 0.007 + 0.022 0.026 +/- 0.031

-0.023 +/- 0.024 0.100 +/- 0.200 0.026 +/- 0.052 0.021 +/- 0.032 0.007 +/- 0.030

-0.004 +/- 0.029

-0.040 +/- 0.240 0.008 +/- 0.061 Th-228 Zn-65 Zr-95

-0.060 +/- 0.120

-0.013 +/- 0.077

-0.028 +/- 0.064 0.000 +/- 0.110

-0.004 +/- 0.067 0.006 +/- 0.042

-0.061 +/- 0.092 0.035 +/- 0.062 0.023 +/- 0.038 Ag-110m Be-7 Co-58 Co-60 Cr-51 H

0.008 +/- 0.029

-0.270 + 0.230 0.015 +/- 0.034

-0.012 +/- 0.032 0.030 +/- 0.240 0.000 +/- 0.038

-0.100 +/- 0.210 -

-0.006 +/- 0.026 -

0.015 +/- 0.023

-0.160 +/- 0.220 -

0.002 +/- 0.024 0.200 +/- 0.200 0.039 +/- 0.035

-0.017 +/- 0.035 0.100 +/- 0.220 Cs-134 Cs-137 Fe-59 1-131 K-40 0.041 d: 0.029

-0.042 +/- 0.031 0.050 + 0.079 0.035 +/- 0.078 3.650 +/- 0.820

-0.016 +/- 0.017 0.013 0.046

-0.038 0.057

-0.028 +/-0.045 4.1 10 +/- 0.720 0.006 +/- 0.019

-0.008 - 0.029 0.000 +/- 0.055 0.019 +/- 0.044 3.400 +/- 1.000 Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 0.011 0.024 0.035 0.055

-0.014 0.026 0.090 +/- 0.240 0.005 +/- 0.063

-0.005 0.022 0.011 0.043 0.009 0.022 0.030 +/- 0.200 0.006 +/- 0.060 0.026 + 0.025 0.002 + 0.031

-0.004 + 0.031 0.240 +/- 0.250

-0.024 +/- 0.043 Th-228 Zn-65 Zr-95 0.010 +/- 0.110 0.090+/-0.110 0.011+/-0.043 0.034 +/- 0.094 0.130 +/- 0.130 0.006 +/- 0.038 0.010+/-0.120 0.023+/-0.064 0.011 +/-0.053 Ag-110m Be-7 Co-58 Co-60 Cr-51 0.013 +/- 0.030 0.130 +/- 0.150 0.003 +/- 0.019, 0.005 +/- 0.025 0.000 +/- 0.160

-0.010+/- 0.022 -

0.000 +/- 0.110

-0.017 +/- 0.019 -

0.022 +/- 0.024

-0.050 +/- 0.100 -

0.016 +/- 0.047 0.270 +/- 0.420 0.013 +/- 0.044 0.048 +/- 0.062 0.240 +/- 0.320

-0.055 +/- 0.047

-0.030 + 0.260

-0.015 +/- 0.033 0.007 + 0.035 0.150 +/- 0.270 Cs-134 Cs-137 Fe-59 1-131 K-40

-0.011 +0.015

-0.022 0.027 0.023 +/- 0.051 0.030 0.034 3.870 +/- 0.760

-0.009 + 0.020 -

0.013 +/- 0.015

-0.018 +/- 0.042 -

-0.003 + 0.021 3.880 +/- 0.640 0.005 0.023 0.000 0.044 0.044 +/- 0.087 0.013 0.083 2.300 +/- 1.300 0.011 +/-0.026

-0.017 0.035 0.007 +/- 0.066

-0.072 0.080 3.120 +/- 0.940 40-X 02/28/08 05/29/08 07/17/08 11/14/08 02/28/08 05/29/08 07/17/08 11/14/08 STRIPED BASS STRIPED BASS STRIPED BASS STRIPED BASS STRIPED BASS STRIPED BASS STRIPED BASS STRIPED BASS 3-59

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 17-B, Fish - Other (pCilg)

Collection Location Date Isotope 40-X 02/28/08 05/29/08 07/17/08 11/14/08 02/28/08 05/29/08 07/17/08 11/14/08 STRIPED BASS STRIPED BASS STRIPED BASS STRIPED BASS Mn-54 Nb-95 Ru-103 Ru-106 Sb-125 0.008 -0.021

-0.010 +/- 0.024 0.004 40.017 0.120:+/- 0.180

-0.026 +/- 0.053 0.014 - 0.016

-0.017 7- 0.019 -

-0.006+/- 0.013

. -0.050+/- 0.150 0.019 +/-0.035

-0.019 +/- 0.027 0.017 +/- 0.062 0.035 40.037 0.450 +/- 0.340 0.030 +/- 0.110 0.000 0.035

-0.001 +/- 0.036 0.004 +/-L 0.037

.- 0.190 + 0.250 0.000 +/- 0.061 Th-228 Zn-65 Zr-95 STRIPED BASS 0.061 +/- 0.097 0.006 +/- 0.048

-0.024 +/- 0.038 STRIPED BASS

-0.041 +/- 0.060 0.0 19 +/- 0.077

-0.030 + 0.033 STRIPED BASS

-0.030 +/- 0.120 0.020 +/- 0.110 0.038 +/-- 0.096 STRIPED BASS 0.010 +/- 0.130

-0.012 +/- 0.099 0.017 +/- 0.055 3-60

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental. Operating Report 2008 Table 18, Mussels (pCi/g)

Collection Location Date Isotope 28 03/28/08 06/19/08 09/03/08 12/I 8/08 03/28/08 06/19/08 09/03/08 12/18/08 03/28/08 06/19/08 09/03/08 12/18/08 Ag-I10m 0.007 +/- 0.024 0U002 +/- 0.023

-0.006 +/- 0,020

-0.017 +/- 0.052 Be-7 Co-58 Co-60 Cr-51

ý Cs-134 0,160 +/- 0.180 0.000 + 0.020

-0.002 0.018

-0.020 +/- 0.210 0.004+ 0.013 0.030 +/- 0.240

-0.033 +/- 0.030 -

0.018 0.029

-0.160 +/- 0.210

-0.008 9 0.019 0.040+/- 0.160 0.010+/-0.017 0.003 0.019 0.080+/-0.150 0.009 0.014 0.050 +/- 0.330 0.029. 0.040 0.046 +/- 0.042 0.040 +/- 0.300

-0.003 + 0.040 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 0.007 +/- 0.020

-0.016 +/- 0.034 0.001 +/-0.017

-0.070 +/- 0.050 0.000 +/- 0.038

-0.006 +/- 0.045 1,830 +/- 0.480 0.009 +/- 0.016

-0.021 + 0.019

-0.012 + 0.069 0.021 k 0.049 2.030 +/- 0.850

-0.008 +/- 0.028

-0.015 b 0.033 0.002 +/- 0.030

-0.030 +/- 0.032 -

1.860 +/- 0.530

.0.010 +/- 0.017

-0.003 + 0.020

-0.029 +/- 0.070 0.055 +/- 0.062 1.400 +/- 0.810

-0.046 +/- 0.042 0.032 +/- 0.038 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95

-0.016 +/- 0.016 0.010 0.150 0.027 +/- 0.046

-0.014 0 0.065

-0,024 0.043 0.016 +/- 0.033

-0.018+/-0.024 0.100+/-0.240

- -0.086+/-0.068-0.050+/-0.110

-0.011+/-0.073 -

0.029+/-0.047

-0.003 +/- 0.017 0.020 +/- 0.190 0.002 +/- 0.051 0.055 +/- 0.081 0.008 +/- 0.054 0.007 +/- 0.030

-0.021 +/- 0.035

-0.250 0.320

-0.049 +/- 0.092

-0,090 0.180

-0.050 0.110

-0.044 +/- 0069 30 Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 02/25/08 06/25/08 08/21/08 12/15/08 0.004 + 0.027 0.010+/- 0.066 0.019

+/-0.028

-0.036 +/- 0.039 Cs-137 0.002 +/- 0.019 0.029 +/- 0.045

-0.024 +/- 0.022 0.015 +/- 0.026 Ru-103 0.100+/-0.160 0.007L +/-0.020

-0.004 +/- 0.016

-0.150 +/- 0.150

-0.005 0.012 0.000 +/- 0.330 0.000 +/- 0.051 0.008 +/- 0.048 0.180+/- 0.310 0.014 0.027 0.020 +/- 0.220 0.009 +/- 0.023 0.000 +/- 0.023 0.080 +/- 0.210

-0.002 +/- 0.015 0.330 +/- 0.270

-0.003 +/- 0.029 0.023 +/- 0.030 0.160 +/- 0.230 0.007 +/- 0.019 Fe-59 1-131 K-40 Mn-54 Nb-95 02/25/08 06/25/08 08/21/08 12/15/08 02/25/08 06/25/08 08/21/08 12/15/08 0.006 +/- 0.041

-0.006 +/- 0.039 2.150 : 0.600

-0.001 +/-0.020 0.028 +/- 0.021 0.017 +/- 0.076 0.022 +/- 0.071 3.400 +/- 1.300 0.016 +/- 0.037

-0.002 +/- 0.044 0.012 +/- 0.036

-0.008 +/- 0.068 2.050 0.630 0.008 0.019 0.015 +/- 0.024

-0.010 +/- 0.067 0.018 +/- 0.055 2.340 +/-0.790 0.023 0.038 0.001 +/- 0.031 Ru-106 Sb-125 Th-228 Zn-65 Zr-95

-0.005+/-0.020

-0.100 +/- 0.180 0.012+/-0.042.

-0.078 +/-0.079 0.011 +/- 0.047 0.004+/-0.032 0.033 +/- 0.041 0.014

-0.140 +/- 0.290

-0.090 +/-0.110

-0.020 +/- 0.170

-0.039 +/- 0.098 0.050 +/- 0.058

+/-0.026 0.110 +/- 0.200 0.011 0.062 0.020+/-0.067 0.002+/-0.046 0.030+/-0.041

-0.003 +/- 0.025 0.060 +/- 0.210 0.037 +/- 0.074

-0.040 +/- 0.110

-0.020 +/- 0.057 0.000 +/- 0.055 3-61

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 19, Oysters (pCi/g)

Collection Location Date Isotope 31 03/17/08 06/25/08 09/10/08 12/03/08 03,/17/08 06/25/08 09/10/08 12/03/08 03/17/08 06/25/08 09/10/08 12/03/08 Ag-il0m

-0.012 +/- 0.029 0.003 +/- 0.041

-0.016 +/- 0.033 0.027 + 0.038 Be-7 Co-58 Co-60 0.120 +/- 0.270 0.009 + 0.028 0.004 + 0.025

-0.040 +/- 0.230 0.011 +/-0.026

-0.002 +/- 0.039 0.020+/-0.170

-0.016+/-0.023

-0.011 +/-0.022 0.030 +/- 0.240

-0.00 1 +/- 0.032 0.040 +/- 0.039 Cs-137 Fe-59 1-131 K-40

-0.007 +/- 0.021 0.011 +/- 0.036

-0.013 +/- 0.031 0.020 +/- 0.027

-0.020 +/- 0.063 0.001 +/- 0.062 1.440 +/- 0.650 0.000 +/- 0.074 0.026 +/- 0.047 3.200 +/- 1.200 0.009 +/- 0.049

-0.008 +/- 0.038 -

1.620 +/- 0.760 0.000 +/- 0.065 0.016 +/- 0.046 1.710 +/- 0.820 Cr-51

-0.090 +/- 0.200

-0.070 +/- 0.220

-0.080 +/- 0.210

-0. 100 +/- 0.260 Mn-54 0.005 +/- 0.025 0.016 +/- 0.034

-0.001 +/- 0.023 -

0.005 +/- 0.032 Zn-65

-0.038 +/- 0.059 0.016 +/- 0.054

-0.010 +/- 0.058 0.023 +/- 0.066 Cr-51 Cs-134 0.011 +/- 0.020

-0.009 +/- 0.020 0.009 +/- 0.018

-0.013 +0.017 Nb-95 0.023 +/- 0.034

-0.002 +/- 0.036 0.007 +/- 0.027

-0.001 +/- 0.030 Zr-95 0.006 +/- 0.059 0.059 +/- 0.077

-0.007 +/- 0.046

-0.025 +/- 0.047 Cs-134 Ru-103 Ru-106 Sb-125 Th-228

-0.016 +/- 0.021 0.000 +/- 0.023 0.003

+/- 0.030 0.018 +/- 0.029 Ag-il0m

-0.030 +/-0.220 0.033 +/- 0.072 0.050 +/- 0.100 0.000 +/- 0.270 0.022 +/- 0.064

-0.040 +/- 0.063 -

-0.070 +/- 0.270

-0.014 +/- 0.060 0.060 +/- 0.120

-0.010+/-0.300

-0.017+/-0.064 0.050+/-0.100 32 Be-7 Co-58 Co-60 03/13/08 0.076 +/- 0.033

-0.110 +/- 0.210 0.007 +/- 0.026 0.016 +/- 0.034

-0.230 +/- 0.250 0.021 +/- 0.021 06/09/08 07/03/08 12/02/08 03/13/08 06/09/08 07/03/08 12/02/08 03/13/08 06/09/08 07/03/08 12/02/08 0.170 +/- 0.064 0.229

+/- 0.032 0.017+/-0.031 Cs-137

-0.200 +/- 0.390

-0.010 +/- 0.036 -

-0.012 +/- 0.041 0.050 +/- 0.200 0.017 +/- 0.021 0.003 +/- 0.023 0.040 +/- 0.210 0.003 +/- 0.022

-0.013 +/- 0.024 0.070 +/- 0.380 0.080 +/- 0.190 0.160 +/- 0.200 Mn-54 0.007 +/- 0.026

-0.024 +/- 0.016 0.000 +/- 0.025 Nb-95 Fe-59 1-131 K-40

-0.035 +/- 0.084 0.028 +/- 0.055

-0.017 +/- 0.097 1.280 +/- 0.650

-0.004 +/- 0.021 0.042 +/- 0.042 0.000 +/- 0.074

-0.007 +/- 0.073

-0.009 +/- 0.031 Ru-103

-0.016 +/-0.070 0.011 +/-0.098 1.500 1.000

-0.005 +/- 0.042 0.017 +/- 0.050 1.630 +/- 0.490 0.043 +/- 0.055

-0.005 +/- 0.063 1.880 +/- 0.640 Ru-106 Sb-125 Th-228

-0.003 +/- 0.028

-0.010 +/- 0.220

-0.036 +/- 0.071

-0.027 +/- 0.094 0.015 +/- 0.030 0.015 0.040 +/- 0.300

-0.042 +/- 0.099 -

0.010 +/- 0.130

+/- 0.023

-0.050 +/- 0.200 0.026 +/- 0.054

-0.030 +/- 0.073 0.010 +/- 0.028

-0.030 +/- 0.260

-0.048 +/- 0.070 0.033 +/- 0.094 0.003 +/- 0.033 0.006 +/- 0.017

-0.003 +/- 0.023 Zn-65

-0.041 +/- 0.059 0.030 +/- 0.073 0.000 +/- 0.045

-0.045 +/- 0.061 Cr-51

-0.040 +/- 0.120 0.009 +/- 0.034

-0.018 +/- 0.031 Zr-95 0.029 +/- 0.044 0.025 +/- 0.076 0.045 +/- 0.034 0.023 +/- 0.050 Cs-134 34-X Ag-ll0m Be-7 Co-58 Co-60 03/17/08 06/24/08 09/10/08 12/03/08 03/17/08 06/24/08 09/10/08 12/03/08

-0.003 +/- 0.028 0.020 +/- 0.160 0.003 +/- 0.023 0.006 +/- 0.020

-0.009 +/- 0.041 0.080 +/- 0.280

-0.002 +/- 0.036 0.007 +/- 0.044 0.011 +/- 0.033

-0.050 +/- 0.200 0.007 +/- 0.044 0.006 +/- 0.024 0.000 +/- 0.038 0.150 +/- 0.270 0.005 +/- 0.037 0.007 +/- 0.031

-0.180 +/- 0.220

-0.007 +/- 0.015 Cs-137 Fe-59 1-131 K-40

-0.130 +/- 0.250 0.080 +/- 0.200

-0.170 +/-0.160 Mn-54 0.005 +/- 0.022 0.015 +/- 0.034 0.012 +/- 0.020

-0.005 +/- 0.028.

-0.015 +/- 0.025 0.007 +/- 0.017

-0.007 +/- 0.028 Nb-95 0.003 +/- 0.031

-0.008 +/- 0.039 0.003 +/- 0.031

-0.015 +/- 0.029 0.026 +/- 0.021 0.010

+/- 0.030 0.004 +/- 0.027 0.022 +/- 0.037 0.003 +/- 0.038

-0.056 +/- 0.071 1.630 +/- 0.560

-0.016 +/- 0.054 0.022 +/- 0.061 1.000 +/- 1.400 0.054 +/- 0.057

-0.004 +/- 0.038 2.660 +/- 0.880 0.029 +/- 0.081

-0.005 +/- 0.050 1.560 +/- 0.800 3-62

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 19, Oysters (pCi/g)

Collection Location Date Isotope 34-X 03/17/08 06/24/08 09/10/08 12/03/08 Ru-103 0.013 +/- 0.027 0.000 +/- 0.035 0.017 +/- 0.023 0.007 +/- 0.026 36 Ag-I 10m 03/30/08 06/24/08 09/04/08 12/03/08 06/24/08 09/04/08 12/03/08 06/24/08 09/04/08 12/03/08 03/14/08 06/24/08 09/10/08 12/03/08 I

0.03 8 +/- 0.044

-0.013 +/- 0.021 0.001 +/- 0.030 Cs-137

-0.014 +/- 0.036 0.020 +/- 0.021 0.024 +/- 0.023 Ru-103

-0.011 +/-0.023

-0.003 +/- 0.027 0.009 +/- 0.023 Ag-ll0m 0.006 + 0.025

-0.004 +/- 0.041

-0.007 +/- 0.046

-0.017 +/- 0.048 Ru-106

-0.180 +/- 0.250 0.180+/- 0.290 0.070 +/- 0.260 0.010 +/- 0.230 Be-7 0.260 +/- 0.250

-0.120 +/- 0.200 0.010 +/-0.170 Fe-59

-0.022 +/- 0.062

-0.010 +/- 0.051

-0.027 +/- 0.044 Ru-106 0.260 +/- 0.270 0.110:+/- 0.220 0.040 +/- 0.150 Be-7 0.060 +/- 0.220

-0.040 +/- 0.220 0.030 +/- 0.200

-0.040 +/- 0.290 Fe-59 0.000 +/- 0.052

-0.058 +/- 0.083 0.011 +/- 0.074

-0.015 +/- 0.087 Ru-106

-0.040 +/- 0.190 -

0.090 +/- 0.180 0.180+/- 0.210 0.220 +/- 0.250 Be-7 Sb-125

-0.009 +/- 0.057 0.047 +/- 0.081 0.057 +/- 0.067

-0.043 +/- 0.066 Co-58

-0.005 +/- 0.032 0.014 +/- 0.023 0.003 +/- 0.024 1-131

-0.031 +/- 0.055 0.020 +/- 0.033 0.000 +/- 0.048 Sb-1 25

-0.008 +/- 0.049 0.026 +/- 0.053 0.042 +/- 0.044 Co-58 0.002 +/- 0.022 0.006 +/- 0.012 0.012 +/- 0.029 0.002 +/- 0.028 1-131

-0.064 +/- 0.080 0.063 +/- 0.048 0.006 +/- 0.032 0.007 +/- 0.065 Sb-125 0.015 +/- 0.059 0.021 +/- 0.068 0.025 +/- 0.065

-0.065 +/- 0.082 Co-58 Th-228 Co-60 Cr-SI 0.046 +/- 0.085

-0.030 +/- 0.052 0.090 +/- 0.140

-0.068 +/- 0.090

-0.010 +/- 0.100 0.000 +/- 0.071

-0.030+/-0.100 0.021 +/-0.061 Zn-65 0.012+/-0.027

-0.160+/-0.310 0.009 +/- 0.032

-0.050 +/-0.190

-0.034 +/- 0.025 0.070 +/-0.210 K-40 Mn-54 1.560+/-0.740 0.015+/-0.028 1.870 +/- 0.740

-0.007 +/- 0.024 2.210 +/- 0.670

-0.016 +/-0.020 Th-228 Zn-65 0.000 +/- 0.140 0.007 +/- 0.039

-0.018 +/- 0.090

-0.019 +/- 0.059 0.012 +/- 0.090

-0.039 +/- 0.059 Zr-95

-0.013 +/- 0.042

-0.003 +/- 0.069 0.018 +/- 0.054 0.036 +/- 0.050 Cs-134 0.016 +/- 0.022

-0.002 +/- 0.018

-0.012 +/- 0.017 Nb-95 0.026 +/- 0.033

-0.005 +/- 0.033

-0.012 +/- 0.026 Zr-95

-0.009 +/- 0.050 0.022 +/- 0.048

-0.010 +/- 0.037 Cs-134

-0.006 +/- 0.017 0.009 +/- 0.024

-0.005 +/- 0.020 0.021 +/- 0.025 Nb-95 0.000 +/- 0.021 0.006 +/- 0.026

-0.008 +/- 0.027 0.013 +/- 0.024 Zr-95 0.026 +/- 0.036 0.019 +/- 0.043

-0.020 +/- 0.036 0.006 +/- 0.061 Cs-134 37-C Co-60 Cr-51

-0.003 +/- 0.020

-0.150 - 0.250 0.016 +/- 0.036 0.060 +/-0.270

-0.016 +/-0.030

-0.030 +/-0.210 0.008 +/- 0.031

-0.220 +/- 0.280 Cs-137 K-40 Mn-54 03/14/08 06/24/08 09/10/08 12/03/08 03/14/08 06/24/08 09/10/08 12/03/08

-0.001 +/- 0.020

-0.022 +/- 0.037 0.026 +/- 0.027 0.020 +/- 0.032 Ru-103 0.009 +/- 0.024 0.018 +/- 0.026 0.011 +/- 0.023 0.000 +/- 0.030 2.110+/-0.570

-0.013+/-0.016 2.500+/- 1.100 0.002+/-0.037 1.650+/-0.740

-0.011 +/-0.020 1.910 +/- 0.930 0.022 +/- 0.043 Th-228 Zn-65

-0.001 +/- 0.066 -

-0.065 +/- 0.055 -

0.037 +/- 0.084 0.045 +/- 0.066

-0.070 +/- 0.110 0.035 +/- 0.061 0.060 +/- 0.130

-0.045 +/- 0.098 88-X Ag-lr0m Co-60 Cr-51 12/03/08 J

-0.030 +/- 0.037 0.170 +/- 0.200

-0.025 +/- 0.026 0.005 +/- 0.031 0.060 +/- 0.260

-0.004 +/- 0.024 3-63

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 19, Oysters (pCi/g)

Collection Location Date Isotope 88-X Cs-137 12/03/08

-0.003 +/- 0.025 Ru-103 12/03/08 0.009 + 0.033 Fe-59

-0.015 +/- 0.063 Ru-106

-0.140 1 0.280 1-131 K-40

-0.027 +/-= 0.046 1.520 +/-z 0.670 Sb-125 Th-228

-0.028 =E 0.072

-0.020 +/- 0.110 Mn-54 0.000 +/-z 0.026 Zn-65

-0.015 +/-z 0.059 Nb-95 0.005 +/- 0.029 Zr-95 0.012 +/-z 0.043 3-64

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 20, Clams (pCilg)

Collection Location Date Isotope 29 Date Ag-ll0m Be-7 Co-58 Co-60 Cr-51 Cs-134 03/28/08

-0.005 +/- 0.025

-0.090 +/- 0.170

-0.023 +/- 0.026 0.003 +/-E 0.020 0.000 - 0.170 0.019 4 0.017 06/03/08 0.008 +/-0.032 0.000 +0.180 0.003 +/- 0.022 0.015 L 0.028

-0.110 +/- 0.150 -

-0.001 +/- 0.019 -

09/03/08

-0.010 0.041

-0.040 0.200

-0.019 0.018

-0.011 +/- 0.026 0.050 0.200 0.003 0.015 11/04/08

-0.016 t

0.044

-0.050 0.220

-0.012 0.025

-0.045 +/- 0.040 0.000 0.220 0.012 0.021 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 03/28/08 0.000 +/- 0.020 0.0J 5 +/- 0.056 0.014 :i 0.041 2.370 +/- 0.700 0.010 +/- 0.021

-0.010- 0.025 06/03/08

-0.024 +/- 0.016 0.014 +/- 0.049 0.028 +/- 0.036 2.150 +/- 0.720

-0.015 +/- 0.022

-0.012 +/- 0.024 09/03/08 0.002 +/- 0.032 0.026 +/- 0.067

-0.007 +/- 0.040 2.280 +/- 0.760 0.019 : 0.023

-0.012 +/- 0.019 -

11/04/08

-0.020 +/- 0.031 0.009 +/- 0.049 0.018 +/-- 0.047 2.420 +/- 0.810

-0.016 +/- 0.031 0.001 +/- 0.025 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 03/28/08

-0.026 +/- 0.021 0.020 E 0.

0120

-0.005 +/- 0.053

-0.039 +/- 0.077 0.000 +/- 0.051

-0.017 +/- 0.040 06/03/08

-0.016 +/- 0.020 0.000 +/- 0.160 0.000 + 0.049

-0.005 +/-f 0.063 -

-0.029 +/- 0.041

-0.003

ý 0.031 -

09/03/08 0.006 +/-- 0.025 O. 110 +/-- 0.260

-0.007 +/- 0.055 0.010 +/- 0.110 0.027 +/-: 0.054 0.005 + 0.046 11/04/08

-0.012 +/- 0.027

-0.110 +/- 0.280 0.000 +/- 0.056 0.000 +/-.110 0.009 +/- 0.073

-0.020 +/- 0.042 35-X Ag-110m Be-7 Co-58 Co-60 Cr-51 Cs-134 03/28/08

-0.005 +/- 0.033 0.000 +/- 0.190 0.015 +/- 0.024 0.013 +/- 0.025

-0.210 0.250

-0.007 0.020 06/19/08 0.021 +/- 0.045 0.008 0.070 +/- 0.270

-0.021 +/- 0.025 -

0.026 +/- 0.032 0.060 +/- 0.280

-0.020 +/- 0.021 -

09/03/08

+/-0.033 0.100 +/-0.210

.0.013+/-0.020 0.014+/--0.023 0.120-0.150 0.010+/-0.017 11/04/08

-0.037 +/- 0.053 0.100 +/- 0.190

-0.011 +/- 0.021 0.000 +/- 0.030 0.040 +/- 0.210

-0.004 +/- 0.023 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 03/28/08

-0.027 +/- 0.029

-0.008 +/- 0.043

-0.019 +/- 0.052 2.290 +/- 0.710

-0.005 +/- 0.024

-0.013 +/- 0.027 06/19/08

-0.001 k 0.032 0.020 +/- 0.073

-0.056 +/- 0.090 -

1.660 +/- 0.790 0.024 +/- 0.028

-0.028 +/- 0.037 09/03/08

-0.009 +/- 0.030 0.033 +/- 0.051 0.014 +/- 0.029 1.510 +/- 0.620

-0.004 +/- 0.027 0.015 +/- 0.024 11/04/08

-0.013 +/- 0.030 0.032 +/- 0.089

-0.024 +/- 0.041 2.720+/-. 0.990

-0.020 +/- 0.025

-0.020 +/- 0.032 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 03/28/08 0.003 +/- 0.023 0.150 +/- 0.210 0.023 +/- 0.055

-0.050 +/- 0.100 0.032 +/- 0.056

-0.047 +/- 0.044 06/19/08 0.009 +/- 0.034 0.270 +/- 0.300 0.011 +/- 0.071 0.060 +/- 0.130

-0.007 +/- 0.078

-0.009 +/- 0.053 09/03/08

-0.003 +/- 0.020 0.030 +/- 0.150 0.043 +/- 0.059 0.020 +/- 0.110 0.034 +/- 0.059 0.025 +/- 0.044 11/04/08 0.008 +/- 0.026

-0.240 : 0.270 0.000 +/- 0.065

-0.050 +/- 0.100 0.007 : 0.083

-0.059 +/- 0.066 38 Ag-I!0m Be-7 Co-58 Co-60 Cr-51 Cs-134 03/28/08

-0.008 +/- 0.023 0.130 +/- 0.150 0.006 +/- 0.017 0.007 + 0.019 0.020 +/- 0. 180

-0.006 +/- 0.014 06/19/08 0.004 +/- 0.039 0.009

-0.120 +/- 0.240 0.012 +/- 0.025 0.017 +/- 0.026

-0.010 +/- 0.230 -

0.010 +/- 0.023 09/03/08

+/- 0.024 0.030 +/- 0.150

-0.002 +/- 0.021

-0.015 +/- 0.021 0.010 +/- 0.160

-0.005 +/- 0.015 11/04/08 0.053 +/- 0.050

-0.160 +/- 0.230

-0.032 +/- 0.029

-0.018 +/- 0.043 0.000 +/- 0.200

-0.006 +/- 0.018 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 03/28/08

-0.004 +/- 0.017 0.003 +/- 0.045

-0.006 +/- 0.039 1.960 +/- 0.520

-0,002 +/- 0.018 0.014 +/- 0.025 06/19/08 0.016 +/- 0.031 0.043 +/- 0.071 0.031.+/- 0.040 2.270 +/- 0.670 0.000 +/- 0.022

-0.009 +/- 0.025 09/03/08 0.010 +/- 0.021

-0.021 0.042 0.022 0.030 2.200 +/- 0.580 0.004 +/- 0.019

-0.014 0.025 11/04/08 0.008 +/- 0.025

-0.054 +/- 0.065 0.008 +/- 0.050 2.130 +/- 0.950

-0.007 +/- 0.025 0.026 +/- 0.030 3-65

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Table 20, Clams (pCi/g)

Collection Location Date Isotope 38 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 03i28/08

-0.010 +/- 0.021 0.020 +/- 0.180

-0.004 +/- 0.045

-0.005 +/- 0.063

-0.026 +/- 0.049

-0.007 +/- 0.030 06/19/08

. -0.017 +/- 0.023 0.070 +/- 0.220

-0.035 +/- 0.072 0.002 +/- 0.069 0.026 +/- 0.053

-0.005 +/- 0.038 09/03/08

-0.004 +/- 0.025

-0.190 +/- 0.210 0.035 +/- 0.047

-0.006 + 0.083

-0.036 + 0.058 0.011 +/- 0.043 11/04/08 0.010+/-0.023 0.000 +/- 0.210

-0.008+/-0.069

-0.042 0.092 0.011+/-0.079

-0.021+/-0.047 39-X Ag-b10m Be-7 Co-58 Co-60 Cr-51 Cs-134 03/12/08 0.014 +/- 0.032 0.000 +/- 0.150

-0.005 +/- 0.019

. -0.013 +/- 0.022 0.130 +/- 0.220 0.003 +/- 0.017 06/12/08

-0.001 +/- 0.026 70.080 +/- 0.270 0.037 +/- 0.031

-0.001 +/- 0.026 0.220 +/- 0.310 0.001 +/- 0.026 09/04/08 0.011 +/- 0.037 0.012 0.070 +/- 0.220

-0.019 +/- 0.023 -

0.010 +/-0.029 0.040 +/- 0.240

-0.007 +/-0.024 11/10/08

+/-0.030 0.100+/-0.130 0.002+/-0.019 0.009+/-0.018 0.050+/-0.160 0.001 +/-0.016 Cs-137 Fe-59 1-131 K-40 Mn-54 Nb-95 0312/08 0.005 +/- 0.025 0.038 +/- 0.051 0.009 +/- 0.046 1.690 +/- 0.510 0.016 +/- 0.023

-0.035 +/- 0.033 06112/08

-0.005 +/- 0.032 0.078 +/- 0.093

-0.026 +/- 0.069

'2.200 +/- 0.920

-0.002 +/- 0.025 -

-0.055 +/- 0.042 -

09/04/08

-0.010 +/- 0.029 0.006 +/- 0.040 0.028 +/- 0.045 2.270 +/- 0.820 0.004 +/- 0.024 0.005 +/- 0.032 11/10/08 0.005 +/- 0.018 0.007 +/- 0.043

-0.021 +/-0.057 2.330 +/- 0.630 0.000 +/- 0.024

-0.007 +/-0.018 Ru-103 Ru-106 Sb-125 Th-228 Zn-65 Zr-95 03/12/08

-0.005 +/- 0.025

-0.100 +/-0.200

-0.043 +/- 0.050 0.037 +/-0.075 0.041 +/- 0.056

-0.004 +/- 0.040 06/12/08

-0.025 +/- 0.036 0.050 +/- 0.240

-0.064 +/- 0.085

-0.040 +/- 0.120 -

-0.060 +/- 0.100 -

0.011 +/- 0.086 09/04/08

-0.010 +/- 0.028

-0.240 +/-0.240 0.033 +/- 0.083 0.020 +/- 0.100 0.024 +/- 0.055

-0.032 +/- 0.043 11/10/08

-0.012 +/- 0.020 0.050 +/- 0.180

-0.036 +/- 0.044 0.003 +/- 0.060

-0.023 +/- 0.051 0.015 +/- 0.033 3-66

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 22, Lobsters (pCi/g)

Collection Location Date Isotope 32 01/15/08 05/05/08 07/28/08 10/06/08 01/15/08 05/05/08 07/28/08 10/06/08 01/15/08 05/05/08 07/28/08 10/06/08 Ag-1 10m 0.000 +/- 0.048 0.004 +/- 0.034

-0.024 4 0.037 0.001 0.018 Be-7 0.080 +/- 0.310

-0.050 : 0.210

-0.050 +/- 0.260 0.000 +/- 0.230 Fe-59 Co-58 Co=60 0.006 +/- 0.041 0.016 +/- 0.040

-0.007 +/- 0.024 0.004 +/- 0.033 0.019 +/- 0.031

-0.009 +/- 0.026

-0.002 +/- 0.022

-0.002 +/- 0.030 Cs-137 1-131 K-40 0.010 +/-- 0.039

-0.022 +/- 0.082 0.012 +/- 0.019

-0.010 +/- 0.059 0.003 +/- 0.023 0.018

-0.013 +/- 0.051

+/-*0.025

-0.012+-0.042

-0.017 +/--0.068 2.700 1.100

-0.012 +/-0.035 2.190 +/- 0.760

-0.045 -0.093 -

2.630 -0.760 0.012+/-0.032 2.120+/-0.880 Ru-103 Ru-106 Sb-125 Th-228 35

-0.005 - 0.039

-0.012 - 0.023 0.016 0.028 0.008 - 0.027 Ag-ll0m

-0.034 +/- 0.036

-0.026 +/- 0.049 0.010 +/- 0.039

-0.006 +/- 0.035 Cs-137 0.080 +/- 0.250 0.120 +/- 0.260 0.030 +/- 0.200

-0.070 +/- 0.320 Be-7 0.020 +/- 0.210 0.030 +/- 0.220

-0.030 0.190 0.050 - 0.200 Fe-59 Co-58 0.049 0.091 0.060 +/- 0.190

-0.015 +/-0.055 -

-0.030 +/- 0.110 0.085 - 0.086 0.020 +/-L 0.110 0.009 0.068 0.130 +/- 0.140 Co-60 01/23/08 05/05/08 07/28/08 10/06/08 01/23/08 05/05/08 07/28/08 10/06/08 01/23/08 05/05/08 07/28/08 10/06/08 0.035 +/-- 0.025

-0.004 - 0.018

-0.002 +/- 0.023 -

0.030 +/- 0.050 0.008 +/- 0.026 0.000 - 0.030

-0.028 - 0.022 0.028 - 0.025 Cr-51

-0.220 - 0.310

-0.120-0.180 -

0.180 +/-E 0.320 0.080 +/- 0.200 Mn-54

-0.012 +/- 0.033 0.013 +/- 0.029 0.000 +/- 0.027

-0.012 +/- 0.022 Zn-65

-0.040 +/- 0.110

-0.020 +/- 0.064 0.028 +/- 0.064 0.049 - 0.060 Cr-51 0.000 +/- 0.220

-0.140 - 0.250

0. 110 0.250 0.130+/- 0.190 Mn-54

-0.006 +/- 0.022

-0.004 +/- 0.031 0.014 +/-- 0.021

-0.006 +/- 0.022 Zn-65 0.011 +/- 0.048

-0.068 +/- 0.079 -

0.023 + 0.057 0.010 +/- 0.058 Cr-51 0.010 +/-L 0.220 0.080 +/- 0.2 10

-0.050 +/- 0.220 0.050 +/- 0.190 Mn-54

-0.012 +/- 0.043 -

0.007 +/- 0.029

-0.016 +/- 0.024 0.008 +/- 0.022 Cs-134 0.007 +/- 0,044

-0.002 0 0.017 0.005 +/- 0.015

-0.010 - 0.022 Nb-95

-0.025 +/- 0.047 0.016 0.021 0.021 +/- 0.029 0,017 +/- 0.038 Zr-95 0.032 +/- 0.077

-0.007 +/- 0.052 -

0.019 f- 0.043

-0.020 +/- 0.028 Cs-134 0.0 10 +/- 0.030

-0.007 +/- 0.025 -

0.001 +/-0.016

-0.010 0.014 Nb-95

-0.003 +/- 0.027

-0.0 14 +/- 0.030 0.030 - 0.034

-0.006 +/- 0.020 Zr-95

-0.011 +/- 0.052

-0.032 +/- 0.048 0.033 +/- 0.047 0.012 +/- 0.059 Cs-134

-0.001 - 0.038 0.000 +/- 0.022

-0.012 - 0.015

-0.002 +/- 0.016 Nb-95 0.009 +/- 0.044 0.019 +/- 0.024 0.014 +/- 0.026

-0.016 +/- 0.024 1-131 K-40

-0.019 +/- 0.027 0.004 +/- 0.048 0.022 +/- 0.036 0.016

-0.022 +/- 0.031

+/- 0.032 0.022 +/- 0.069 0.003 +/- 0.016 0.058 +/- 0.054 0.027 +/- 0.065 2.260 +/- 0.690

-0.019 +/- 0.039 -

1.690 +/- 0.900 0.006 +/- 0.086 1.560 +/- 0.630 0.025 +/- 0.040 2.100 +/- 0.740 Ru-103 Ru-106 Sb-125 Th-228 0.006 +/- 0.029 0.000 +/- 0.200 0.014 +/- 0.020 0.013 0.140 +/- 0.310

+/- 0.026 0.030 +/- 0.200 0.000 +/- 0.023 0.000 +/- 0.200 0.042 +/- 0.067 0.000 +/- 0.074 0.042 +/- 0.073 0.020 +/- 0.110 0.048 +/- 0.065

-0.030 +/- 0.100 0.007 +/- 0.063

-0.003 +/- 0.078 37-X 01/15/08 05/21/08 08/08/08 11/13/08 01/15/08 05/21/08 08/08/08 11/13/08 01/15/08 05/21/08 08/08/08 11/13/08 Ag-lr0m 0.004 +/- 0.046

-0.005 +/- 0.031 0.017 +/- 0.030

-0.018 +/- 0.028 Be-7 0.150+/- 0.310 0.070+/- 0.150

-0.030 +/- 0.220

-0.100 +/- 0.140 Fe-59 Co-58 Co-60

-0.0 13 +/- 0.045

-0.031 +/- 0.044

-0.034 +/- 0.027

-0.009 +/- 0.026 0.005 +/- 0.020 0.003 +/- 0.023 0.014 - 0.022

-0.009 +/- 0.025 Cs-137 1-131 K-40 0.000 +/- 0.032 0.008 0.015 +/- 0.091

+/- 0.021

-0.030 +/- 0.051

-0.020 +/- 0.021 0.027 +/- 0.055 0.011 +/- 0.020 0.011 +/- 0.049 0.054 +/- 0.047 2.700 +/- 1.000

-0.013 +/- 0.042 2.720 +/- 0.770

-0.011 +/- 0.097 2.820 +/- 0.630

-0.021 2E 0.051 2.390:+/- 0.640 Ru-103 0.005 - 0.029

-0.016 +/- 0.034 0.000 - 0.023 0.011 +/-0.020 Ru-106

-0.050 +/- 0.360

-0.040 +/- 0.260

-0.020 +/- 0.210 0.060 +/- 0.200 Sb-125 Th-228 Zn-65 Zr-95 0.044 +/- 0.077 0.070 +/- 0.130 0.007 +/- 0.067 0.070: +/-0.110

-0.047 +/- 0.066 0.011 +/- 0.064 0.004 +/- 0.049

-0.038 +/- 0.082 0.031 +/- 0.075

-0.033 +/- 0.067 0.011 +/- 0.056

-0.011 +/- 0.054

-0.007 +/- 0.066 0.012 +/- 0.033 0.014 - 0.038 0.006 +/- 0.035 3-67

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 NOTES FOR DATA TABLES

t Collection Dates for Air Particulates and lodines are listed as Monday -

Sunday, however the typical change-out days are on Tuesdays A

Low volume (10,787 cubic feet, 140 hrs) during week of 2/5 - 2/12 for location 2, caused by GFI trip (see CR-08-01091)

B Goats at location 24-C milked only to feed baby goats during first quarter C

Sampling at location 22 discontinued due to goat milk not available, goats raised for meat only D

Non-pasture grass samples (e.g., hay, grain)

E 2 nd quarter (June) sampling not performed at location 84 since well was dry F

2 nd quarter (June) sample not performed at location 86; repeated attempts to locate well were unsuccessful, used another well for 3 rd and 4 th quarters G

Broad leaf vegetation samples not collected in April due to insufficient growth of vegetation H

1st quarter flounder and fish-other samples at locations 32. and 35 were not available (typically scarce during winter months)

I 1st quarter oyster sample at location 36 not collected because cage holding the oysters in the field was destroyed by winter storms J

1st collection of oysters at this location, extra location until next REMODCM change when this location will replace location 36 3-68

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

4.

DISCUSSION OF RESULTS This section summarizes the results of the analyses on the REMP (Radiological Environmental Monitoring Program) samples.

DNC has carefully examined the data throughout the year and has presented in this section all cases where station related radioactivity could be detected.

The results are compared with previous environmental surveillance data. Few impacts of the station operation on the environment were observed.

Sub-sections contain a description of each particular media or potential exposure pathway.

Naturally occurring nuclides such as Be-7, K-40, and Th-228 were detected in numerous samples. Be-7, which is produced by cosmic processes, was observed predominantly in airborne and vegetation samples. Th-228 results were variable and are generally at levels higher than plant related radionuclides.

Cs-i 37 and Sr-90 were observed at levels similar to those of past years. The levels of Cs-137 and Sr-90 detected were the result of atmospheric nuclear weapons testing in the 1960's.

4.1 Gamma Exposure Rate (Table 1)

Gamma exposure rate is determined from the integrated exposure measured over a calendar quarter using CaSO 4(Tm) Panasonic model UD-804 ASx thermoluminescent dosimeters (TLDs).

In 2000, the TLDs (Victoreen glass bulb CaF2(Mn)), which historically were used to measure radioactivity around Millstone for over 20 years, were replaced with the Panasonic TLDs.

The dosimeters are strategically placed at a number of on-site locations, as well as at inner and outer off-site locations., Starting in 2001, the collection of TLDs was changed from monthly to quarterly and additional measurement locations were incorporated into the REMP requirements listed in the REMODCM (Radiological Effluent Monitoring and Offsite Dose Calculation Manual-Reference 8). Three more locations were added in mid-2003 to prepare for monitoring the potential effect of ISFSI (Independent Spent Fuel Storage Installation - Dry Cask Storage). Two Dry Cask Containers were loaded in the first quarter 2005. Three containers were loaded in mid, 2006 and three in October 2007.

None were loaded in 2008. The exposure rate measurements at these three additional TLD locations remain basically unchanged from the background measurements performed prior to any cask loading (six quarter background average mid 2003 - 2004:

9.5 uR/hour at location 73X, 7.6 uR/hour at location 74X and 6.9 uR/hour at location 75X).

Table 1 lists the exposure rate measurements for all 44 monitored locations. Trends similar to those of past years are apparent. These measurements demonstrate the general variations in background radiation between the various on-site and off-site locations and include gamma exposure from all sources of radioactivity. For example, the Weather Shack (location 02), MP3 Discharge (location 05), Environmental Laboratory (location 08), Bay Point Beach (location 09), Pleasure Beach (location 10),

Corey Road (location 48), and Site Switchyard Fence (location 73) experience higher exposure rates due to their proximity to granite beds and stonewalls. In addition, the Mystic (location 13C) and Ledyard (location 14C) control locations experience relatively higher background exposure rate than the other control locations at Norwich and Old Lyme (locations 15C and 16C). The only appreciable effect seen in the recent TLD data is that attributable to the variation in the background radiation that is consistent with previous years.

4-1

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Figure 4.1-1 shows a historical trend of TLD exposure rate measurements, comparing an annual average of all indicator TLDs, an annual average of all control TLDs, and the annual average of the two most critical indicator locations which are used to represent the two closest site boundary residences in the North-northwest and Northeast directions.

Examination of the average measurements since 1990, shows interesting site changes and site characteristics. For example, the average of all indicator locations for the period when Unit 1 was still in operation (through 1995) display the effects of N-16 BWR turbine building sky-shine to immediate areas onsite. As discussed in previous annual reports, the effects of sky-shine at onsite monitoring stations were increased exposure rates as high as 6 uR/hr at certain onsite locations. The elevated exposure rates from sky-shine decreased rapidly with distance to levels indistinguishable from normal background measurements at even the nearest offsite monitoring.stations. Also apparent, in Figure 4.1-1 is the replacement of the historical Victoreen TLD monitoring system with the Panasonic system in year 2000. The difference in response between the two systems is very apparent, with the new Panasonic TLDs reading 15% to 20%

lower. This lower response is consistent for all locations, including both indicator and control locations.

The figure also relates the difference in critical indicator locations 1 and 3 and the annual average of all indicator TLDs to the annual average of the control TLDs collected and measured during coincident periods throughout the year. As discussed earlier, the exposure measurements of many indicator locations onsite (and two of the control locations) are influenced by natural background exposure differences caused by the many granite out-croppings typical of the local area. Figure 4.1-1 shows the annual average at indicator location 1 is slightly higher in gamma exposure rate than the average control gamma exposure rate.

An opposite trend, is shown for location 3.

These differences are the result of the differences in granite at these locations.

In 2005 and 2006, there was a small increase noted at locations 5 and 8 caused by storage of the Unit 2 replaced reactor head. As expected, this increase exhibited a decreasing trend because of radioactive decay.

The head was shipped offsite for disposal in the fourth quarter 2006; the measured levels at these two locations have returned to the background levels measured prior to the head being placed in the storage area. Although not measurable, any resulting site boundary doses are bounded by dose rates from the radwaste storage areas and are discussed in Section 5.

4-2

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 4.1-1 MILLSTONE TLDs Historical Annual Gamma Exposure Rate uR/hr 4.2 Air Particulate Gross Beta Radioactivity (Table 2)

Air is continuously sampled at seven inner ring (0 to 2 miles) locations and one control location (14 miles N) by passing it through glass fiber particulate filters. These samples are collected weekly and analyzed for gross beta radioactivity. Results are shown on Figure 4.2-1 and Table 2. Gross beta activity remained at levels similar to that seen over the last decade.

Inner and control monitoring locations continue to show no significant variation in measured activities (see Figure 4.2-2). This indicates that any station contribution is not measurable.

4.3 Airborne Iodine (Table 3)

Charcoal cartridges are included at all of the air particulate monitoring stations for the collection of atmospheric iodine. These cartridges are analyzed on a weekly basis for I-131. No detectable levels of 1-131 were seen in the 2008 charcoal samples.

4-3

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 4.2-1 Air Particulate Gross Beta Activity Monthly Averages - 2008 pCi/m3 0.035 0.03 0.025 0.02 0.015 0.01 L

nictr Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Doc Figure 4.2-2 Air Particulate Gross Beta Activity Monthly Averages - 5 Year Trend 0.035.r 0.03 0.025 0.02 0.015 0.01 4-4

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 4.4 Air Particulate Gamma (Table 4A-D)

The air particulate samples that are utilized for the weekly gross beta analyses are composited quarterly and analyzed for gamma emitting isotopes. The results, as shown in Tables 4A - 4D, indicate the presence of naturally occurring Be-7, which is produced by cosmic radiation. No other positive results are seen. These analyses indicate the lack of station effects.

4.5 Air Particulate Strontium (Table 5)

Prior to 1989 Table 5 was used for listing the data for measurements of Sr-89 and Sr-90 in quarterly composite air particulate filters. The historical data indicated the lack of any detectable station related activity. Since these analyses are not listed in NUREG 1301 (Reference 15), these measurements were. discontinued.

In the event of widespread station related contamination or other unusual events (such as the 1986 Chernobyl incident), these measurements could be made. Historically, when world events created conditions that caused detectable measurements of these nuclides, there was no difference noted. between indicator and control locations. This further confirms that any of the detectable levels for these nuclides were not plant related.

4.6 Soil (Table 6)

Millstone resumed collection of soil as a required media type in 2001.

Prior to 2001, it had not been sampled for, over fifteen years. These samples were discontinued due to the fact that, previous sample results never indicated any station related detectable activity.

Similarly, -since 2001, no station detectable activity has been seen in these samples. The results of these samples, allows for the determination of baseline activity levels in soil. This is particularly important for Cs-137, since significant levels from past weapons testing fallout remain in the soil. Baseline levels should be useful in the future, when site characterization and decommissioning of the station become the focus during preparations for License termination. This media is collected annually from one control and two indicator locations.

4.7 Cow Milk (Table 7)

Typically, the most sensitive indicator of fission product existence in the terrestrial environment is the radiological analysis of milk samples.

Milk is a widely consumed food, therefore it is usually one of the most critical exposure pathways. Since 1996 all dairy (cow) farms close enough to Millstone to be considered an indicator location (i.e.

conservatively within 10 miles, reference 15 specifies within 5 miles) have ceased operation. Therefore, the sampling of cow milk has been discontinued until such time dairy activities in the nearby area resume.

Each year the Land Use Census is used to identify locations of milk animals that should be included in the monitoring program. It is performed annually and is maintained by observations, door-to-door surveys and consulting with local agriculture authorities. The 2008 census is listed in Appendix A. If a new dairy farm is identified close enough to Millstone to be considered an indicator location, the collection of cow milk will resume.

4-5

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 4.8 Goat Milk (Table 8)

When available, these samples are collected twice per month during grazing season and once per month during the rest of the year. Each sample is analyzed for 1-131 and gamma emitting nuclides. Although not required by the REMODCM, samples from each location are composited quarterly and analyzed for Strontium.

Goat milk samples are typically a more sensitive indicator of fission products in the terrestrial environment than cow milk samples. It should be noted that the uptake of radionuclides in milk is dependent on a number of parameters.

These include:

metabolism of these animals, feeding habits, farming practices and feed type. Similar to previous years, Cs-137 and Sr-90 are observed in goat milk.

During past weapons testing periods, samples taken at certain milk locations indicated higher'uptake of fallout than others. This was especially apparent in past samples collected in the immediate area around Millstone (see' previous Annual Operating Reports).

One of these sites, located at 5.2 Mi. NNE of Millstone (previous location 22, sampled from 1994 through 2004), exhibited a trend of, showing higher Sr-90 and Cs-137 concentrations than at some of the other locations (including ones located closer to Millstone). The Station and regulatory authorities (e.g., see Reference 17) have.carefully reviewed past and present data.

The presence of the Sr-90 and Cs-137 is the result of residual radioactivity deposited into the environment from the fallout of past nuclear weapons testing. The facts that lead to this conclusion are presented in Section 6.0. These facts include:

effluent release totals for these isotopes show insufficient quantities to account for such measurements; Sr-89 and Cs-1 34 which are chemically similar and generally released in comparable quantities were not detected, and a trend since the early 1960's that shows a consistent declining presence of Cs-1 37 and Sr-90 in milk from Connecticut.

The 2008 results indicate no detectable 1-131 in this media:. In the,1970's and 1980's low levels of plant related 1-131 were seen in some of these samples. However, for over 19 years, no plant related detectable levels of 1-131 have been seen in goat milk samples, The only other occasions where 1k131 was detected were fallout episodes from the Chinese Weapons Tests of the mid to late 1970's and Chernobyl Accident in 1986.

Goat milk was unavailable at all locations both early and late in the year. Per requirements, pasture grass or feed is collected as a substitute when milk is not available (see 4.9. Pasture Grass and Feed).

4.9 Pasture Grass and Feed (Table 9)

When the routine milk samples are unavailable, samples of pasture grass are required as a replacement. These samples may also be taken to further investigate the levels of radioactivity in milk. During the winter months and early spring, insufficient growth often prohibits sampling of pasture grass.

Feed (e.g., hay) is typically sampled whenever pasture grass is not available.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 No station effects are noted in these samples. Cosmic produced Be-7 was observed in the majority of the pasture grass samples and many of the hay samples. Due to its relatively short half-life (52 days), it was not detected in the several of the "older" hay samples. Naturally occurring K-40 was approximately two times higher in hay compared to pasture grass samples. Similar to goat milk, the Cs-137 values at the indicator and control locations are comparable. This provides an indication that the levels observed are the result of residual fallout from weapons testing.

4.10 Well Water (Table 10)

These samples were discontinued in 1985, because no detectable station activity was ever observed in these samples. However, based upon lessons learned at other nuclear plants, including several undergoing decommissioning, sampling was resumed at several locations starting *in the fourth quarter 2003. Three additional locations were added in 2005 to monitor potential leakage from the ISFSl. Due to the heightened sensitivity on this potential pathway, three more locations were added in 2006 and five more in the summer of 2008. One of these new wells, location 86 (GPI 6 - inside the Unit 3 RCA between the Boron and Waste Test Tank berm and the Fuel Building) indicated a positive tritium result. This was the first sample from this new well. The temporary well located nearby also indicated positive levels (see 2008 Radiological Effluent Report) due to penetrations in the berm and a leaky pressure gauge for one of the Boron Recovery Tanks. The penetrations have been sealed and the pressure gauge repaired. The H-3 levels have since become undetectable at this location. Consistent with the past data, there were no other incidents of any station activity detected in these samples.

4.11 Reservoir Water (Table 11)

Reservoir water samples are special samples not required by the REMP. Previous data has shown the lack of detectable station activity in this media. This fact and the extremely unlikely possibility of observing routine station effluents in this media have resulted in discontinuing these samples. In the event of, widespread station related contamination, these samples may be collected.

4.12 Fruits and Vegetables (Table 12)

Consistent with past years, this media did not show any station effects.

Naturally occurring K-40 was detected in all samples.

4.13 Broad Leaf Vegetation (Table 13)

Consistent with past years, this media did not show any station effects. Most samples had detectable levels of cosmic produced Be-7, at levels consistent with previous years.

This media can be an early and sensitive indicator of releases from the station for both unplanned releases and normal operations. Therefore, to enhance program-monitoring effectiveness, samples of broadleaf vegetation are collected monthly during the growing season, May - October, even though requirements are to collect this media twice a year.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 4.14 Seawater (Table 14)

The guidance in Reference 15 specifies one sample upstream (control -

beyond.

significant influence of the discharge) and one sample downstream (indicator - beyond but near the mixing zone) for surface water samples.

Historically the downstream sample for Millstone has been located in the vicinity of discharge (location 32 - see Reference 8) which is prior to the mixing zone. This location was chosen since it was readily accessible by power and not affected by cold weather conditions. Operation of an automatic sampler at the indicator location is necessary for providing a representative sample.

Although samples obtained at this location actually monitor the undiluted discharge activity, as discussed below, it provides. for an excellent check on the effluent monitoring program.

Any dose consequences can be assessed by use of the appropriate dilution factors. It's not as important to have a continuous sampler at the control location due to the relative consistency noted in seawater background activity near the Millstone Site.

A technician collects an aliquot from the automatic sampler at Location 32 on a weekly frequency. These samples are composited for monthly analyses. In September 1999, Millstone increased the required analysis frequency for this composite sample to monthly to increase monitoring effectiveness. For the Control Location, Giant's Neck (Location 37C), six weekly grab samples are obtained for quarterly compositing. In 2003, the LLD for H-3 (tritium) at the indicator location (32) was lowered by approximately a factor of four to further enhance monitoring effectiveness. This lower LLD was continued through 2008.

Naturally occurring K-40 was the only detectable gamma activity seen in these samples.

Measured plant related levels of H-3 inseawater from the immediate vicinity of discharge (location 32) were observed in 9 of the 12. samples. This is an increased frequency from 2007. Both, Unit 2 and Unit 3 experienced refueling outages in 2008 and tritium releases are typically higher near these outages (due to the need for increased liquid processing during these times). As mentioned above, these samples are taken directly from liquid effluent flow prior to dilution into the Long Island. Sound. Dilution studies performed for this discharge have determined that a dilution factor of 3 is appropriate to estimate concentrations immediately outside the quarry within a near-field area.

Tritium builds up in the reactor coolant during each fuel cycle. It is generated during plant operation from fission and neutron reactions. Between 1992 and 2002, H-3 was not typically detected.

However, due to the enhanced detection sensitivity, H-3 levels are now often detected at the indicator location. Figure 4.14-1 shows a sixteen-year trend of H-3 releases in the Millstone liquid effluents versus the measured environmental concentrations from the vicinity of discharge location.

Sampling "undiluted discharge water" and analyzing to a "low H-3 LLD" enables a direct comparison of effluent monitoring to environmental monitoring for this exposure pathway. Figure 4.14-2 (one year trend) and Figure 4.14-3, (four year trend) show this comparison. This comparison is more accurate than Figure 4.1-1 since it takes into account the dilution flow during each month.

Dilution flow can change substantially during plant outages. By plotting the data.monthly, the resolution of the comparison is further enhanced, although there can be slight discrepancies due to the REMP sample not necessarily being on the last day of each month.

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Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 4.14-1 H-3 Curies Released versus Seawater Concentration 16 Year Trend 1700*

1600 Curies discharged T

1500 1400

-- - RE pCi/liter 1300 1200 11001 1000 900 800-700 600 500 400 A

Ll A

A

]1

,/

/4 1

300 w

q W

A\\

1/

t\\11 200

/ -

F.

/

dC S C

C CC C

C C

C CC C 0

0 0

0 o

0 0

C 0

o 00 41 0

0 0

Figure 4.14-2 Seawater 3 Concentration REAP Samples Es.

Effluent Measurements - 2008 1600 1400t FEW Samples 1200 --

-Effluent Measure mnents 12O00 1000 Z 800 600 400-200 0

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 4-9

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 4.14-3 Seawater H-3 Concentration REMP Samples vs Effluent Measurements - 4 Year Trend 3000*

2800 0 REMP Samples 2600 -

Effluent Measurements 2400-.

2200 o

2000 --

1800-1600-1400-1200-1000 800 I I

I 8f 600 V1 IIIA f

400 200 0-9 9

9 9

9 0

0 9

0

-~

a CO C

a

~

C O

5 a

-5 u) z n

z

F co z

4.15 Bottom Sediment (Table 15)

Cs-137 was detected in both samples from Golden Spur (67X). This is typical for this location, since it is a fresh water area. The levels of Cs-137 at this location are comparable to those observed in past river water sediments taken from other areas of the Connecticut River. Because of the relative distance and direction of the Golden Spur location from the station and comparable levels seen the much farther river water locations, the Cs-1 37 detected at Golden Spur is from weapons testing fallout.

Similar to previous years, Cs-137 was also detected in the extra samples from Jordon Cove Bar (39X). These levels are somewhat smaller than those at Golden Spur. These low levels likely exhibit some effect of the fresh water drainage from Jordan Brook.

The decreasing trend of Co-60 noted in the last several years has continued in the samples from Jordan Cove Bar to levels just below detectable. Somewhat higher levels were noted in 2004 - 2006 and similar levels noted in 2003. Prior to 2003, plant related activity had not been detected in bottom sediment for over a decade. Bottom sediment is not a significant dose pathway to man, especially at areas not typically used by the public.

Examinations of other aquatic media, including seafood, sampled from near these locations (discussions that follow) do not show any detectable Co-60 or Cs-1 37.

A new sediment location was added in 2006 near the closest public beach (location 69X). The data for this location has not indicated any plant related activity.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 4.16 Aquatic Flora (Table 16)

Although sampling of this media is not required, it provides useful information since it a very sensitive indicator of radioactivity in the environment. Low levels of activity (e.g:,

Mn-54, Co-58, Co-60, Zn-65, 1-131 and Ag-110m) have been detected in the past.

Since 2000, levels have decreased to undetectable for all nuclides except for 1-131. One positive 1-131 measurement was noted in 2004 and 2007, several in 2005 and in 2006 and two in 2008. The 1-131 levels noted in 2004 through 2008 have been determined to be caused by medical usage.

Seaweed has a significant bioaccumulation factor for iodine which makes it an extremely sensitive indicator of iodine in the environment.

Due to the initial positive 1-131 indications in 2004 and 2005, additional monitoring and studies were conducted in 2006. Extra samples were obtained at Thames River and Rocky Neck to determine if there may have been other sources for these very low levels of 1-131.

These extra samples indicated the most likely cause for the 2004 - 2008 positive 1-131 results was the outfall from nearby wastewater (sewage) treatment plants.

The usage of 1-131 in medical treatments is becoming more common and it is not unusual for it to be in the wastewater. The New London Waste Water Treatment Plant is located on the west side of the Thames River near Fort Trumbull.

Groton has two wastewater treatment plants, one located across the Thames River (and slightly upstream) from the New London treatment plant and the other near Bluff Point. The highest 1-131 results were in the samples from within the Thames River, which were taken near the outfall from the New London Waste Water Treatment Plant. There was no other activity detected in the flora samples. Therefore, no Station related radioactivity was detected in aquatic flora in 2008.

J, 4.17 Fish (Tables 17A and. 17B) 4.17.1 Flounder (Table 17A)

The activity in Flounder is the same as that seen for the past decade. No activity was observed except for the naturally occurring nuclides.

4.17.2 Fish - Other (Table 17B)

The activity in other fish is the same as that seen for the past decade. No activity was observed in this media except for naturally occurring nuclides, including samples taken from within the quarry.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 4.18 Mussels (Table 18)

Similar to the last several years, this sampling media showed no station related radioactivity at all locations.

4.19 Oysters (Table 19)

All locations, except for the quarry, utilize oysters stocked in trays. The oysters used for stocking these trays have been obtained from Ram Island for the last several years. To confirm that the stocked oysters are not initially contaminated, the oysters from Ram Island have are also analyzed. The stocked trays are kept at most of the sampling areas to guarantee samples and facilitate sample collection. Historically' native oysters were sampled at the quarry (location 40X), which was an extra location.

Due to safety concerns about diving operations, sampling at location 40X was suspended after the 2 nd quarter 2007 samples.

Station related Ag-i 1 0m was observed in three of the four samples from the location 32.

No station related activity was observed in samples from beyond the station discharge area. Although location 32 is labeled as the vicinity of discharge, historically it was actually located at the end of the quarry until 2007 when it was moved to a more accessible area in the middle of the quarry. This was also done to address safety concerns for the individuals performing sample collection.

For several previous years, high levels of Zn-65 were observed in oysters. This was caused by their high capacity for accumulating zinc. Studies have shown that oysters can accumulate as much as 50 times or more the amount of zinc compared to most other seafood (Wolfe, 1979).

A remarkable correlation existed between the Zn-65 concentration measured in the native quarry oysters and 'the amount of Zn-65 discharged into the environment. However, since the permanent shutdown of Millstone Unit 1 in 1996, the amount of Zn-65 in liquid effluents has decreased significantly.

Starting in 2001, no Zn-65 has been detected in either the liquid effluents or in oysters.

Figure 4.19-1, shows a historical trend that existed between Zn-65 releases and measured concentrations in quarry oysters. The decreasing trend in effluent radioactive releases is apparent in both the curies released and the measured concentrations in oysters.,

Figure 4.19-2 shows the trend of Ag-i 10m concentration in quarry oysters compared to the liquid effluents discharged.

Similar to Zn-65, the correlation between Ag-110m discharged and the Ag-i 10m concentration measured in the native quarry oysters is apparent.

Section 5 provides for a comparison of doses based upon effluent measurements (method 1) to doses based upon environmental measurements (method 2). Per regulatory guidance (reference 7), the bioaccumulation factors for both Zn and Ag were adjusted based upon several years of historical data to account for the higher measured uptakes. These adjustments have typically shown good agreement between the two methods, with method 1 usually being conservative. The 2006 and 2007 data indicate an unusual trend (see Section 5, Table 5-2).

Method 2 (REMP dose assessment) indicates higher doses than method 1 (effluent dose assessment). Due to significant effluent reductions over the last several years, the low resulting doses (0.0064 mrem) make this comparison difficult and subject to significant error. Trending of these comparisons is routinely performed and adjustments are made, if appropriate.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 The location of the quarry is on-site and not available for public use. No station activity was observed at locations beyond the station discharge area. Therefore, the actual concentration of the nuclides in oysters available for public consumption is much less than the levels found inside the quarry.

The near-field dilution factor for liquid discharges from the Millstone quarry discharge is a factor of 3. The dose consequence of the station related radioactivity via this pathway is discussed in Section 5.0.

4.20 Clams (Table'20)

Occasionally this media indicates the presence of station related radioactivity.

No station related radioactivity was observed in any of the clam samples taken in 2008.

4.21 Scallops (Table 21)

Scallops are not required by the REMP. However, attempts are made to sample this media to confirm station effects because scallops could be available for public consumption. No scallop samples have been available for several years.

4.22 Lobsters (Table 22)

Like the last several years, no station related radioactivity was detected in this sample media in 2008.

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Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 4.19-1 Zn-65 COMPARISON Curies Curies Discharged vs. Native Oyster Concentration pCi/gram 0.1 100 0 uisDischarged 0

Oyster Conc.

0.01 I

10 0.001 1

0.0001 0.1 0.00001 0.01 0.000001..........

0.001 Quarter Figure 4.19-2 Ag-110m COMPARISON Curies Curies Discharged vs. Native* Oyster Concentration pCilgram 0.1 100 0.010"1*

--O-Curies Discharged I 10 0.01 Oyster Conc.10 0.001 0.0001 0.1 0.00001 0.01 0.000001 10.001

0)

0) 0

0)

0) 0Q 0rter Quarter

Native oysters until 3Q 2007; because of diver safety issues now the only oysters sampled in the Quarry are stocked in trays similar to what has historically been performed at all the other locations.

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Annual Radiological Environmental Operating Report Millstone Station 2008

5.

OFFSITE DOSE EQUIVALENT COMMITMENTS The off-site dose consequences (dose equivalent commitments) of the station's radioactive liquid and airborne effluents have been evaluated using two methods.

The first method utilizes calculations of direct dose from sources onsite and the station's measured radioactive discharges as input parameters into conservative modelgto simulate the transport mechanism through the environment to man. This results in the calculation of the maximum dose consequences to individuals. The results of these computations have been submitted to the NRC in the Radioactive Effluent Release Report written in accordance with the Radiological Effluent Monitoring and Offsite Site Calculation Manual,Section I.F.2. This method, which is usually conservative (i.e., computes higher doses than that which actually occur), has the advantage of approximating an upper bound to the dose consequences. This is important in those cases where the actual dose consequence cannot be measured because they are so small as to be well below the capabilities of conventional monitoring techniques.

The second method utilizes the actual measurements of the concentrations of radioactivity in various environmental media (e.g., fish, shellfish) and then computes the dose consequences resulting from the consumption of these foods.

The results of both methods are compared in Table 5.1 for those pathways where a potential dose consequence exists and a comparison is possible. The doses presented in this table are calculated at the location of maximum effect from the station effluents for that pathway and for the critical age group.

For example, the external gamma dose from gaseous effluents is calculated for the site boundary location which is not only the nearest but also has the greatest directional wind frequency and fish and shellfish doses are calculated assuming they are from an area within 500 feet of the station discharge.

Summarizing the data in Table 5.11:

MAXIMUM TOTAL INDIVIDUAL DOSES:

WHOLE BODY = 0.20 mrem GI(LLI) = 0.023 mrem Thyroid = 0.16 mrem The majority of the whole body dose is due to a conservative determination of dose (=0.18 mrem) to the nearest resident as a result of direct radiation from on-site radioactive waste operation/storage facilities and continuous occupancy. The GI(LLI) (gastro-intestinal tract, lower large intestine) dose is essentially all attributable to the liquid pathway based upon Method 2.

The thyroid dose is based upon conservative assessments using Method 1.

Since the maximum dose consequence to an individual is at the location of highest dose consequence, doses will be less for all other locations. The average whole body dose to an individual within 50 miles historically is on the order of 1000 times less than the maximum individual whole body dose.

In order to provide perspective on the doses in Table 5.1, the standards on the allowable maximum dose to an individual of the general public are given in 40CFR190 as 25 mrem whole body, 75 mrem thyroid, and 25 mrem to any other organ. These standards are a fraction of the normal background radiation dose of approximately 284 mrem per year and are designed to be inconsequential in regard to public health and safety. Since station related doses are even a smaller fraction of natural background, they have insignificant public health consequences. In fact, the station related doses to the maximum individual are less than 10% of the variation in natural background in Connecticut.

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Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 TABLE 5.1 COMPARISON OF DOSE CALCULATION METHODS MILLSTONE POWER STATION 2008 Annual Dose (millirem)

Method1 (1)

Method 2(1)

Pathway Individual Organ Unit I Unit 2 Unit 3 Station

'Station (BWR)

(PWR)

Total Airborne Effluents

1. External Gamma Dose Max(2)

Whole Body 0.0000 0.0015 0.0032 0.0047 ND(3)

(gamma air) (8)(2

2. Whole Body Dose Max(2)

Whole Body 0.0004.5 0.0036 0.0180 0.022 ND (internal and external)

3. Inhalation, vegetables and Max(2).

Thyroid 0.00045 0.066 0.093 0.16 ND goat milk Direct Dose Nearest Residence.

Max(2)

Whole Body N/A N/A N/A

-0.18 (4

<1.8(5,8) 5-2

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 TABLE 5.1 (Cont.)

COMPARISON OF DOSE. CALCULATION METHODS MILLSTONE POWER STATION 2008 Annual Dose (millirem)

Max Method 1(1)

Method 2 Pathway Individual Organ Unit I Unit 2 Unit 3 Station Station (BWR)

(PWR)

Total Liquid Effluents

1. Fish Adult Whole Body 0.0000002 0.000351 0.000332 0.000684 ND (3)

Teen 0.0000001 0.000331 0.000280 0.000610 Child 0.0000000 0.000360 0.000264 0.000624 Adult Gl(LLI)(6) 0.000000 0.007490 0.003791 0.01128 ND Teen 0.000000 0.005309 0.002703 0.00801 Child 0.000000 0.001945 0.001053 0.00300 Adult Liver 0.0000002 0.000818 0.000511 0.00133 ND Teen 0.0000002 0.000831 0.000473 0.00130 Child 0.0000002 0.000774 0.000423 0.00120

2. Shellfish

Adult Whole Body 0.000000 0.000412 0.000214 0.000626 0.000018(7)

Teen 0.000000 0.000422 0.000207 0.000630 0.000018 Child.

0.000000 0.000513 0.000236 0.000749 0.000020 Adult GI(LLI) 0.000000 0.01051 0.00161 0.01212 0.012(7)

Teen 0.000000 0.00730 0.00114 0.00844 0.0085 Child 0.000000 0.00261 0.00044 0.00306 0.0030 Adult Liver 0.000000 0.001117 0.000457 0.00157 0.000030(7)

Teen 0.000000 0.001171 0.000466 0.00164 0.000055 Child 0.000000 0.001144 0.000449 0.00159 0.000043 5-3

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 Notes:

1. Except for direct dose, method 1 uses measured station discharges and meteorological data as input parameters to transport-to-man models that conservatively calculate dose to people; method 2 uses actual measured concentrations in environmental media to estimate the dose.

2. Maximum individual - The maximum individual dose is the dose to the most critical age group at the location of maximum concentration of station related activity. The dose to the average individual is much less than the maximum individual dose.

3. ND -

Not Detectable - No station related 'activity. could be detected above natural background or above the minimum detectable level (MDL).

4. The dominant source of direct dose from the station is from storage 'and movement of radioactive waste.

Storage of radioactive waste is allowed in several areas onsite.

Operation of the storage facilities is limited by design to ensure that the maximum direct dose at the site boundary from each area does not exceed one millirem. Actual exposure throughout the year was maintained much less than this operational limit. Each facility is monitored onsite by the Radiation Protection Department using TLDs.

The exposure measured for each facility TLD was corrected for distance to the nearest site boundary residence. The resultant exposure was conservatively multiplied by 1.5 to account for sky-shine. These maximum estimated doses from each facility were summed for a cumulative site commitment of approximately 0.18 millirem.

The whole body dose from airborne effluents was 0.022 and from liquid effluents was 0.0013. This results in a total estimated whole body dose to the maximum individual of 0.20 mrem (0.18 + 0.022 + 0.0013).

5. Measured dose was derived from monthly TLD readings. There are two residences that qualify as the closest residence; each has a TLD near.enough to use as an estimate to each residence. The one with the highest average dose rate was used to estimate the direct dose to the closest residence. A background dose rate was subtracted. This background was derived from the average of the five control TLD locations. This method is very conservative assuming natural exposure influences, such as granite, are actually plant related exposure.

This method provides a bounding high value. The exposure measurements of the select indicator locations are influenced by natural background exposure differences caused by the many granite out-croppings typical of the Millstone area. Historical data has shown that TLD sample locations in the vicinity of granite can be dramatically influenced by natural radioactivity contained within the granite.

6.

GI (LLI) - Gastrointestinal Tract - Lower Large Intestine.

7. Based on measured levels in the native quarry oysters. A measured near field dilution factor of 3 was used to adjust for the fact that these oysters are on-site and inaccessible to the public. This factor adjusts the measured on-site concentration to that which could occur to a public accessible off-site location after dilution of the effluent by the Long Island Sound.

The measured levels in the stocked oysters within the quarry were about one-half the native quarry oysters.

For conservatism, it was assumed the maximum individual consumed primarily oysters (activity in clams was much lower than in the oysters).

8. Based upon the conservatively assuming no correction for building shielding and occupancy.

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Annual Radiological Environmental Operating Report Millstone Station 2008

6.

DISCUSSION The evaluation of the effects of station operation on the environment requires the careful consideration of many factors.

Those factors depend upon the media being affected.

They include station release rates, effluent dispersion, occurrence of nuclear weapons tests, seasonal variability of fallout, local environment, and locational variability of fallout.

Additional factors affecting the uptake of radionuclides in milk include soil conditions (mineral. content, pH, etc.),

quality of fertilization, quality of land management (e.g., irrigation), pasturing habits of animals, and type of pasturage. Any of these factors could cause significant variations in the measured radioactivity. A failure to consider these factors could cause erroneous conclusions.'

Consider, for example, the problem of deciphering the effect of station releases on the radioactivity measured in milk samples. This is an important issue because this product is widely consumed and several fission products readily concentrate in this media. Some of these fission products, such as 1-131 and Sr-89 are relatively short-lived. Therefore they can result from either station effluents, nuclear weapons tests or nuclear incidents (e.g. Chernobyl). Sr-89's lifetime is longer than 1-131's, therefore it will remain around for much longer periods of time. The even longer-lived fission products, Sr-90 and Cs-137, cause more of a concern. These isotopes are still remaining from the weapons testing era of the 1960's. This results in measurable amounts of Sr-90 and Cs-137 appearing in some milk samples. Distinguishing between this "background" of fallout activity and station effects is of prime interest for a Radiological Environmental Monitoring Program.

In reviewing the historical and present Sr-90 and Cs-137 measured in cowand goat milk in the areas around Millstone station, a casual observer could notice that in some cases the levels of these isotopes are higher at farms-closer to the station than at those further away from the station.

The station's effluents might at first appear to be responsible.

However, the investigation of the following facts proves this conclusion wrong.

(1) The stations accurately measure many fission products, including Sr-90 and Cs-137 in their releases.

Based on these measurements and proven models developed by the Nuclear Regulatory Commission, concentrations in the environment can be calculated.

These calculations (generally conservative, see Section 5.0) show that insufficient quantities of Sr-90 and Cs-137 have been released from the plants to yield the measured concentrations in milk.

(2) Over-. the. many years.,of station operation, Sr-89 has often been released in comparable quantity to Sr-90. Since they are chemically similar, comparable levels should have been detected in milk if the Sr-90 was station related.

No station related Sr-89 has ever been detected in milk samples.

(3) Similar to Sr-89, Cs-1 34 can be used as an indication of station related Cs-137. Although:not as conclusive as Sr-89, the lack of any measurable Cs-134 in any of the milk samples suggests that the Cs-1 37 is not station related. This is further confirmed by the evaluation of the air particulate data. The only occurrences of detectable Cs-1 34 in milk resulted from the Chernobyl incident.

(4) Dairy milk sampling in Connecticut began in the 1960's, several years prior to nuclear station operation. The highest levels of weapons fallout related Sr-90 and Cs-137 (see Figures 6-1 and 6-2), were measured in the years prior to station operation.

Samples taken in the immediate station areas have always shown higher levels of weapons related fallout than samples taken from the Central Connecticut Region (CT Pooled Milk). Radioactivity levels of fallout related Sr-90 and Cs-137 have decreased significantly since the 1964 Nuclear Test Ban Treaty due to decay.

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Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 (5) Local variability of Sr-90 and Cs-137 in milk is common throughout the United States. Due to the variability in soil conditions, pasturing methods, rainfall, etc., it is the rule rather than the exception. Therefore, it is not surprising that certain farms have higher levels of radioactivity than other farms. In fact, in the past there are some cases where the farms further from the station have higher Sr-90 and Cs-1 37 values than the farms that are closer to the station.

(6) In the past when a goat farm operated near Millstone (2.0 Mi - ENE), the highest levels of Sr-90 and Cs-137 were typically indicated.

This same farm also experienced the highest levels of short-lived activity from the 1976 and 1977 Chinese Tests and the 1986 Chernobyl accident. This indicates that for some unknown reason this farm had the ability for higher reconcentration. Special studies performed at this and other farms failed to find any link to the station.

Based on these facts, the observation that the station effluents are responsible is evidently false.

The cause must be one or more of the other variables.

Dominion has carefully examined the data throughout the years and has presented in this report all cases where station related radioactivity could be detected.

An analysis of the potential exposure to the maximum individual from any station related activity has been performed and shows that in all cases the exposure is insignificant.

The Connecticut Department of Environmental Protection (DEP) performs an independent check on certain environmental program analyses. The results of their analyses are comparable to the results from this program's analyses. These comparisons can be used as a cross-reference to verify measured station activity.

DEP performed a comprehensive review of all the historical Millstone data in 2006 (reference 17). It concluded that "the collective sampling in and around Millstone Power Station show expected levels of residual fallout from weapons testing and the Chernobyl event and are unrelated to the operation of the Millstone Power Station."

Figure 6-1 Strontium-90 in Milk pCi/liter 25 CT Pooled Milk 20 Haddam area Milk 15-A Millstone area Milk 15 10 5

61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 Year 6-2

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Figure 6-2 Cesium-137 in Milk 140 120 100 i/liter I1,

--- O-Pooled Milk

-A-Haddam area Milk 3h Millstone area Milk I I \\

I I I-I I

80-1 60 40 20 i Z 00 1 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 Year Dairy milk is no longer available in the Millstone area, Haddam Neck no longer collects milk, and CT Pooled milk has not been collected by the State of CT since 1994. Graphs provided to show historical trends.

CY Start-up occurred: July 24,1967 MP2 Start-up occurred:

December, 1975 MP1 Start-up occurred:

October 26, 1970 MI3 Start-up occurred:

January 23, 1986 6-3

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008

7.

REFERENCES

1) United States of America, Code of Federal Regulations, Title 10, Part 50, Appendix A Criteria 64.

2)

Donald T. Oakley, "Natural Radiation Exposure in the United States." U. S. Environmental Protection Agency, ORP/SID 72-1, June 1972.

3)

National Council'on Radiation Protection and Measurements, Report No. 93, "Ionizing Radiation Exposures of the 'Population of the United States," September 1987.

4)

National Council on Radiation Protection and Measurements, Report No. 94, "Exposure of the Population of the United States and Canada from Natural Background Radiation,"

December 1987.

5)

United States Nuclear Regulatory Commission, Regulatory Guide 8.29, "Instructions Concerning Risks from Occupational Radiation Exposure," Revision 0, July 1981.

6)

Millstone Training Brochure.

7)

United States Nuclear Regulatory Commission, Regulatory Guide 1.109, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for.the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I," Revision 1, October 1977.

8)

Millstone Power Station Radiological Effluent Monitoring and Offsite Dose Calculation Manual, Revision 025-02, December 2006.

9)

United States of America, Code of Federal Regulations, Title 10, Part 20.1301.

10) United States of America, Code of Federal Regulations, Title 10, Part 50, Appendix I.

11) United States of America, Code of Federal Regulations, Title 40, Part 190.

12) United States Nuclear Regulatory Commission, Regulatory Guide 4.1, "Program for Monitoring Radioactivity in the Environs of Nuclear Power Plants," Revision 1, April 1975.

13) ICN/Tracerlab, "Millstone Nuclear Power Station Pre-operational Environmental Radiation Survey Program, Quarterly Reports," April 1967 to June 1970.

14) International Commission of Radiological Protection, Publication No. 43, "Principles of Monitoring for the Radiation Protection of the Population," May 1984.

15) United States Nuclear Regulatory Commission, NUREG-1301, "Offsite Dose Calculation Manual Guidance:

Standard Radiological Effluent Controls for Pressurized Water Reactors," April 1991.

16) United States Nuclear Regulatory Commission, Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program," Revision 1, November 1979.

17) Reassessment of Millstone Power Station's Environmental Monitoring Data, Connecticut Department of Environmental Protection, Division of Radiation, March 2006.

7-1

[1 2008 APPENDIX A LAND USE CENSUS FOR 2008 A-1

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 TABLE A-1 Dairy Cows Within 20 miles of Millstone Point - 2008*

Direction Distance Location N

14 Miles Preston N

15 Miles Norwich N

20 Miles Norwich NNE 16 Miles Norwich NNE 16 Miles Preston NNE 16 Miles Preston NNE 17 Miles Preston NNE 18 Miles Preston NE 13.5 Miles Ledyard NE 18 Miles Preston NE 18 Miles North Stonington NE 19 Miles Preston NE 19 Miles North Stonington ENE 17.3 Miles North Stonington ENE 20 Miles North Stonington WNW 10.5 Miles Lyme NW 10.4 Miles Lyme NW 19 Miles East Haddam NNW 12.4 Miles Salem

previous years the data included the number of cows at each location; this is no longer tracked in the census records Note: None of these cow farms are used for sampling since all farms are greater than ten miles from plant'(NUREG 1301, Reference 15, uses a cutoff distance of 5 miles)

A-2

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 TABLE A-2 Dairy Goats Within 20 miles of Millstone Point-2008 Direction N

N NE ENE ENE WNW NW NNW NNW NNW NNW Distance 2.4 Miles 11.5 Miles 2.7 Miles 12 Miles 13 Miles 18 Miles 17 Miles 12.4 Miles 18 Miles 21 Miles 29 Miles Sample Location Waterford (LOCATION 21)

Oakdale Waterford (LOCATION 22)*

Stonington Stonington Haddam East Haddam Salem Colchester Colchester Hebron (LOCATION 24)

raised for meat only, pigs also at this location A-3.

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 TABLE A-3 2008 Resident/Garden Survey Downwind Direction N

NNE NE ENE E.

ESE

-SE SSE S

SSW SW WSW W

WNW NW NNW Distance to Closest Resident (meters) 1500 860 790 1590 1500 1690 3700 3190 2870 2400 770 740 Distance to Closest Garden (meters) 1490 820 800 1590 1670 1990 3840 3210 2950 2740 2180 1020

N/A - not applicable (over water sectors)

A-4

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 APPENDIX B DNC QA PROGRAM B-1

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 INTRODUCTION Dominion Nuclear Connecticut (DNC) maintains an independent non-required quality assurance (QA) program as part of the radiological environmental monitoring program (REMP). The QA program consists of contractor appraisals and quality control samples. This independent program is applicable to all Dominion nuclear facilities because they share a joint contract with AREVA-NP Environmental Laboratory.

DNC QA PROGRAM The DNC independent QA Program includes spikes of various sample media and duplicate samples.

Sample spikes are a check on the accuracy of results of the contractor's radioanalyses. Duplicate samples tests the contractor's precision, or reproducibility of results, by comparing analytical results of split samples. The number and type of DNC QA Program quality control samples are defined in Millstone Nuclear Power Station Procedure REMP 1.4, "Quality Control of Radiological Environmental Monitoring Program."

An investigation is conducted on any result or trend that does not satisfy acceptance criteria.

OTHER QA PROGRAMS The DNC Independent QA Program is not the only QA Program which monitors REMP radioanalysis performance. Other programs include:

1. Contractor lab's internal QA program. In addition to the Millstone quality control samples, the radioanalysis contractor has its own quality control samples.

In total, at least five percent of the contractor's sample analyses include quality control samples.

2. Contractor lab's interlaboratory comparison program with an independent third party, Analytics, Inc.

Results of the Analytics intercomparison are contained in Appendix C.

Primary contractor participation in an interlaboratory comparison program is required by station Technical Specifications. The Analytics comparison satisfies this requirement.

3. Contractor lab's participation in the National Institute of Standards and Technology (NIST)

Measurement Assurance Program (MAP), the Environmental Resource Associates (ERA)

Proficiency Test (PT) Program, the Department of Energy (DOE) Quality Assessment Program (QAP), and the Mixed Analyte performance Evaluation Program (MAPEP). The lab participates in these interlaboratory QA programs because of other clients' needs, not because of nuclear power station environmental sample analyses.

However, some of these intercomparison samples are also applicable to nuclear power environmental samples.

RESULTS OF MILLSTONE QA PROGRAM FOR CONTRACTOR RADIOANAL YSES Criteria for passing QA sample analysis is that the result be within 20% of the known spike except in the case of Sr-89 or Sr-90 spikes in milk which have to be within 30% of the known spike. To allow more tolerance for lower activity spikes the following alternate criterion may be used: If the two sigma error range of the analyzed result includes the known spike value the result passes.

B-2

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 Table 1 lists the numbers of QC and routine samples for various sample media for 2008. The results of the QC samples are shown on Table 2.

All of the TLD spike tests satisfied the procedural criteria.

Of the 64 individual nuclide analysis results on QA samples, 58 passed the acceptance criteria, a 91 % success rate. Of the 6 failures, 3 were low by 21 - 35%. The other three were 1-131 in milk spikes that were low by 58 - 78%. Due to the relative short half life of 1-131 and long lead time involved in obtaining a new stock solution, additional spiking by DNC has not yet been performed. AREVA performed a detailed investigation of this low bias (see AREVA Condition Report 08-18). Spiking and analyses by both gamma spectroscopy and low level 1-131 analyses indicated no biases. No apparent cause for the DNC spiking bias could be determined.

DNC plans to perform 1-131 milk spikes per the routine QC program during the grazing season in 2009. Except for the 1-131 in milk results, the 2008 results are consistent with last several years. The Millstone QA Program indicated that the contractor lab's environmental radiological analysis program was adequate in 2008.

TABLE 1 2008 QUALITY CONTROL SAMPLES SAMPLE TYPE QC SAMPLES (Note 1)

ROUTINE SAMPLES TLD Spike 16 160 Milk - Strontium 2

12 Milk - Iodine 3

-30 Milk - Gamma (Note 2)

-30 Pasture Grass/Hay Gamma (Milk 0

-30 Substitute)

Water - Gamma 6

60 Water - Tritium 4

60 Fish/Invertebrate - Gamma 4

80 Vegetation/Aquatic Flora/Sediment/Soil -

0 74 Gamma Air Particulate Gross Beta 4

416 Iodine 3

416 Gamma 3

32 FOOTNOTES (Table 1):

1. All samples are spikes except fish/invertebrate which are duplicate oyster samples.

2. Gamma in water QA spikes are treated as milk surrogates.

B-3

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report

.2008 TABLE 2 RESULTS OF 2008 QUALITY CONTROL SAMPLE ANALYSES*

SAMPLE TYPE ANALYSES PASSED ANALYSES.FAILED TLD Spike 16 0

Milk-Strontium

-2 0

Milk-Iodine 0

3 (Note 1)

Water - Gamma 29 0'

Water - Tritium 3

1 (Note 2)

Oysters-Gamma 4

0 Air Particulate Gross Beta 4

0 Iodine 2

1 (Note 3)

Gamma 14 1 (Note 4)

TOTALS TLDs: 16 TLDs: 0 Individual Nuclides: 58 Individual Nuclides: 6 FOOTNOTES (Table 2):

To provide a more detailed comparison of pass versus failure, each nuclide was considered for the gamma and strontium analyses.

1. These ranged from 58 to 73 percent low, caused by I spiking or preservation issues

2. Low by 28% (- 2.44 a)

3. Low by 35%. Second spike analyzed in-house was 32% low; this seems to indicate a problem with the 1-131 spike. Milk also low which seems to confirm a 1-131 spiking issue.

4. Low by 21% (just outside the 20% acceptance criteria).

B-4

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 APPENDIX C

SUMMARY

OF INTERLABORATORY COMPARISONS C-1

Dominion Nuclear Connecticut, Inc.

Annual Radiological Environmental Operating Report Millstone Station 2008 INTRODUCTION This appendix covers the Intercomparison Program of the AREVA-NP Environmental Laboratory as required by technical specifications for each Millstone unit. AREVA-NP uses QA/QC samples provided by Analytics, Inc to monitor the quality of analytical processing associated with the Radiological Environmental Monitoring Program (REMP).

The suite of Analytics QA/QC samples are designed to be comparable with the pre-1996 US EPA Interlaboratory Cross-Check Program in terms of sample number, matrices, and nuclides. It was modified to more closely match the media mix presently being processed by AREVA-NP and includes:

milk for gamma (10 nuclides) and low-level (LL) lodine-131 analyses once per quarter water for gamma (10 nuclides) and low-level (LL) Iodine-131 analyses during the 1st and 3rd quarters water for Sr-89 and Sr-90 analyses during the 1st and 4th quarters water tritium analysis during the 2nd and 4th quarters air filter for gamma (9 nuclides) analyses during the 2nd quarter air filter for gross beta analysis during the 1st and 3rd quarters charcoal filter for 1-131 during the 1st and 3rd quarters air filter for Sr-89 and Sr-90 analyses during the 2nd and 4th quarters In addition to the Analytics Intercomparison Program, AREVA-NP also participates in other intercomparsion programs which include radionuclides and media similar to those required by the Millstone program.

These programs are the National Institute of Standards and Technology (NIST) Measurement Assurance Program (MAP), the Environmental Resource Associates (ERA) Proficiency Test (PT) Program, the Department of Energy (DOE) Quality Assessment Program (QAP), and the Mixed Analyte Performance Evaluation Program (MAPEP).

RESULTS Intercomparison program results are evaluated using AREVA-NP's internal bias acceptance criterion. The criterion is defined as within 25% of the known strontium value for samples containing both Sr-89 and Sr-90 and within 15% of the known value for other radionuclides, or within two sigma of the known value. Any sample analysis result which does not pass the criteria is investigated by AREVA-NP. Analytics Intercomparison Program results are included on pages C-3 through C-7 for 2008. Since the Fourth Quarter Analytics results are not usually available until mid April, the previous year's results are listed.

A total of 131 analysis results were obtained with 125 passing criteria, a 95% success rate.

The three failures for gamma analysis on an air particulate filter (E5531-162) were due to a geometry problem caused by the slightly larger size of the QA filters. All the nuclides for this analysis had a low bias (see AREVA CR 08-11 for more details).

The two failures for strontium analyses on air filters (E5532-162) were due to an incorrect amount of carrier added during filter analysis (AREVA CR 08-10 for more details). Analytical procedures have been corrected to address these two issues. The low bias on the H-3 analysis on water (E5840-162) was actually within 2 sigma (AREVA CR 08-19); counting staff was reminded of the need to achieve 5 % uncertainty at.1 sigma for low range QA analyses. The low bias on gross alpha on an air particulate filter (E5841-162) was investigated by AREVA (AREVA CR 09-01).

Gross alpha analyses are not performed on any Millstone REMP samples.

C-2

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 AREVA NP ENVIRONMENTAL LABORATORY ANALYTICS RADIOLOGICAL ENVIRONMENTAL CROSS-CHECK PERFORMANCE EVALUATION

, Samplefe,, Quarter/

Sample, Reported Known E-LAB/

Number Year Media Nuclide Units Value Value Analytics E5527-162 4th/2007 Water H-3 pCi/L 9000.

9020 1.00 E5528-162 4th/2007 Water Sr-89 pCi/L 87.1 94.9 0.92 E5528-162 4th/2007 Water Sr-90 pCi/L 14.4 15.4 0.93 E5529-162 4th/2007 Charcoal 1-131 pCi 69.8 73.4 0.95 E5530-162 4th/2007 Filter Gross Alpha pCi 103 120 0.86 E5530-162 4th/2007 Filter Gross Beta pCi 166 152 1.09 E5531-162 4th/2007 Filter Ce-141 pCi 84.1 98.4 0.85 E5531-162 4th/2007 Filter Cr-51 pCi 312 358 0.87 E5531-162 4th/2007 Filter Cs-134 pCi 82.3 96.1 0.86 E5531-162 4th/2007 Filter Cs-137 pCi 109 116 0.94 E5531-162 4th/2007 Filter Co-58 pCi 108 122 0.88 E5531-162 4th/2007 Filter Mn-54 pCi 117 133 0.88 E5531-162 4th/2007 Filter Fe-59 pCi 86.6 104 0.83 E5531-162 4th/2007 Filter Zn-65 pCi 135 164 0.83 E5531-162 4th/2007 Filter Co-60 pCi 123 148 0.83 E5532-162 4th/2007 Filter Sr-89 pCi 45.9 102 0.45 E5532-162 4th/2007 Filter Sr-90

pCi, 7.2 16.5 0.44 E5533-162 4th/2007 Milk 1-131LL pCi/L 59.2 60.8 0.97 E5533-162 4th/2007 Milk 1-131 pCi/L 58.5 60.8 0.96 E5533-162 4th/2007 Milk Ce-141 pCi/L 136 141 0.97 E5533-162 4th/2007 Milk Cr-51 pCi/L 517 512 1.01 E5533-162 4th/2007 Milk Cs-134 pCi/L 137 137 1.00 E5533-162 4th/2007 Milk Cs-137 pCi/L 166 166 1.00 E5533-162 4th/2007 Milk Co-58 pCi/L 167 174 0.96 E5533-162 4th/2007 Milk Mn-54 pCi/L 201 190 1.06 E5533-162 4th/2007 Milk Fe-59 pCi/L 155 148 1.05 E5533-162 4th/2007 Milk Zn-65 pCi/L 223 234 0.95 E5533-162 4th/2007 Milk Co-60 pCi/L 205 211 0.97 C-3

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 AREVA NP ENVIRONMENTAL LABORATORY ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATION Ratio

'Sample Quarter/

Sample Reported Known E-LAB/

Number Year."

Media Nuclide Unfts Value Value Analytics E5837-162 lst/2008-Water'ý Gross Alpha pCi/L, 97.2 104,.,

0.93 E5837-162 1st/2008 Water Gross Beta pCi/L 211

209, 1.01 E5838-162 1st/2008 Water 1-131LL pCi/L 66.8 70.4 0.95 E5838-162 1st/2008 Water 1-131 pCi/L 65.6 70.4 0.93 E5838-162 lst/2008 Water Ce-141 pCi/L 187 198 0.94 E5838-162 1st/2008 Water Cr-51 pCi/L 272 286 0.95 E5838-162 1st/2008 Water Cs-134 pCi/L 96.2 99.7 0.96 E5838-162 1 st/2008 Water Cs-1 37 pCi/L 109 116 0.94 E5838-162 lst/2008 Water Co-58 pCi/L 55.8 56.4 0.99 E5838-162 lst/2008 Water Mn-54 pCi/L 75.7 75 1.01 E5838-162 lst/2008 Water Fe-59 pCi/L 81.6 81.4 1.00 E5838-162 1st/2008 Water Zn-65 pCiiL 106 109 0.97 E5838-162 1st/2008 Water Co-60 pCi/L 184 188 0.98 E5839-162 1st/2008 Water Sr-89 pCi/L 89.7, 94.1 0.95 E5839-162 1st/2008 Water Sr-90 pCi/L 11.6 12.7 0.91 E5840-162 lst/2008 Water H-3 pCi/L 3280 4010 0.82 E5841-162 1st/2008 Charcoal 1-131 pCi 59.7 60.0 1.00 E5842-162 1st/2008 Filter Gross Alpha pCi 79.5 99.5 0.80 E5842-162 1 st/2008 Filter Gross Beta pCi 209

,200 1.05 E5843-162 lst/2008 Milk 1-131LL pCi/L 60.0 60.0 1.00 E5843-162 1st/2008 Milk 1-131 pCi/L 54.8 60.0 0.91 E5843-162 1st/2008 Milk Ce-14.1 pCi/L 241 249

. 0.97 E5843-162 1st/2008 Milk Cr-51 pCi/L 360 359 1.00 E5843-162 1st/2008 Milk Cs-134 pCi/L

122, 125 0.97 E5843-162 lst/2008 Milk Cs-137 pCi/L 147 146 1.01 E5843-162 lst/2008 Milk Co-58 pCi/L 69.5 70.8 0.98 E5843-162 1st/2008 Milk Mn-54 pCi/L 98.3 94.2 1.04 E5843-162 1st/2008 Milk Fe-59 pCi/L 107 102 1.05 E5843-162 1 st/2008 Milk Zn-65 pCi/L 129 137 0.94 E5843-162 1 st/2008 Milk Co-60 pCi/L 237 236.

1.00 E5844-162 1st/2008 Milk Sr-89 pCi/L 87.9 95.8

'0.92 E5844-162 1st/2008 Milk Sr-90 pCi/L 10.6 12.9 0.82 C-4

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 AREVA NP ENVIRONMENTAL LABORATORY ANALYTICSRADIOLOGICAL ENVIRONMENTAL CROSS-CHECK PERFORMANCE EVALUATION

Ratio

-Sample Quarter/

Sample.

Reported' Known E-LABI Number Year Media Nuclide Units Value Value Analytics E5900-162 2nd/2008 Water Gross Alpha pCi/L 184 194 0.95 E5900-162 2nd/2008 Water Gross Beta pCi/L 177 169 1.05 E5901-162 2nd/2008 Water 1-131LL pCi/L 45.4 45.3 1.00 E5901-162 2nd/2008 Water 1-131 pCi/L 45.5 45.3 1.00 E5901-162 2nd/2008 Water Ce-141 pCi/L 223 237 0.94 E5901-162 2nd/2008 Water Cr-51 pCi/L 183 188 0.97 E5901-162 2nd/2008 Water Cs-134 pCi/L 94.8 104 0.91 E5901-162 2nd/2008 Water Cs-137 pCi/L 155 158 0.98 E5901-162 2nd/2008 Water Co-58 pCi/L 83.7 84.2 0.99 E5901-162 2nd/2008 Water Mn-54 pCi/L 191 184 1.04 E5901-162 2nd/2008 Water Fe-59 pCi/L 123 125 0.99 E5901-162 2nd/2008 Water Zn-65 pCi/L 162 172 0.94 E5901-162 2nd/2008 Water Co-60 pCi/L 143 142 1.01 E5902-162 2nd/2008 Water Sr-89 pCi/L 76.7 86.3 0.89 E5902-162 2nd/2008 Water Sr-90 pCi/L 15.3 16 0.95 E5903-162 2nd/2008 Water H-3 pCi/L 11700 13000 0.90 E5904-162 2nd/2008 Charcoal 1-131 pCi 97.1 97.8 0.99 E5905-162 2nd/2008 Filter Gross Alpha pCi 214 228 0.94 E5905-162 2nd/2008 Filter Gross Beta pCi 210 199 1.06 E5906-162 2nd/2008 Filter Ce-141 pCi 204 211 0.97 E5906-162 2nd/2008 Filter Cr-51 pCi 180 167 1.08 E5906-162 2nd/2008 Filter Cs-i 34 pCi 89.5 92.7 0.97 E5906-162 2nd/2008 Filter Cs-137 pCi 151.6 140 1.08 E5906-162 2nd/2008 Filter Co-58 pCi 76 74.8 1.02 E5906-162 2nd/2008 Filter Mn-54 pCi 172 163 1.06 E5906-162 2nd/2008 Filter Fe-59 pCi 110 ill 0.99 E5906-162 2nd/2008 Filter Zn-65 pCi 153 153 1.00 E5906-162 2nd/2008 Filter Co-60 pCi 124 126 0.98 E5907-162 2nd/2008 Milk 1-131LL pCi/L 69.9 71.4 0.98 E5907-162 2nd/2008 Milk 1-131 pCi/L 62.3 71.4 0.87 E5907-162 2nd/2008 Milk Ce-141 pCi/L 171 174 0.98 E5907-162 2nd/2008 Milk Cr-51 pCi/L 123 138 0.89 E5907-162 2nd/2008 Milk Cs-134 pCi/L 72.3 76.7 0.94 E5907-162 2nd/2008 Milk Cs-137 pCi/L 119 116 1.03 C-5

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 AREVA NP ENVIRONMENTAL LABORATORY ANALYTICS RADIOLOGICAL ENVIRONMENTAL CROSS-CHECK PERFORMANCE EVALUATION Ratio

!Sample' Quarter/

Sample Reported Known E-LAB/

N, umber

'Year. :

Media Nuclide Unitst, Value Value_

Analytics E5907-162 2nd/2008 Milk

ýCo-58 pCi/L 59.3 61.9_

, 0.96 E5907-162 2nd/2008 Milk Mn-54 pCi/L 146.

135 1.08 E5907-162 2nd/2008 Milk Fe-59 pCi/L 97.6 91.7 1.06 E5907-162 2nd/2008 Milk Zn-65 pCi/L 125.>

127 0.98 E5907-162 2nd/2008 Milk Co-60 pCi/L 106 104 1.02 C-6

Dominion Nuclear Connecticut, Inc.

Millstone Station Annual Radiological Environmental Operating Report 2008 AREVA NP ENVIRONMENTAL LABORATORY ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATION Ratio Sample Quarter/

Sample Reported Known E-LAB/

Number Year Media Nuclide Units Value Value Analytics E6238-162 3rd/2008 Water Gross Alpha pCi/L 141 152 0.93 E6238-162 3rd/2008 Water Gross Beta pCi/L 147 134 1.09 E6239-162 3rd/2008 Water 1-131LL pCi/L 101.9 105 0.96 E6239-162 3rd/2008 Water 1-131 pCi/L 101 105 0.96 E6239-162 3rd/2008 Water Ce-141 pCi/L 110 107 1.03 E6239-162 3rd/2008 Water Cr-51 pCi/L 252 279 0.90 E6239-162 3rd/2008 Water Cs-134 pCi/L 135 154 0.88 E6239-162 3rd/2008 Water Cs-137 pCi/L 104 107 0.97 E6239-162 3rd/2008 Water Co-58 pCi/L 115 118 0.98 E6239-162 3rd/2008 Water Mn-54 pCi/L 117 110 1.06 E6239-162 3rd/2008 Water Fe-59 pCi/L 99.3 95.6 1.04 E6239-162 3rd/2008 Water Zn-65 pCi/L 208 211 0.99 E6239-162 3rd/2008 Water Co-60 pCi/L 148 155 0.95 E6240-162 3rd/2008 Water Sr-89 pCi/L 77.6 95.5 0.81 E6240-162 3rd/2008 Water Sr-90 pCi/L 12.3 14.2 0.86 E6241-162 3rd/2008 Water H-3 pCi/L 10200 11400 0.90 E6242-162 3rd/2008 Charcoal 1-131 pCi 75.6 81.4 0.93 E6243-162 3rd/2008 Filter Gross Alpha pCi 120 129 0.93 E6243-162 3rd/2008 Filter Gross Beta pCi 122 113 1.07 E6244-162 3rd/2008 Milk 1-131LL pCi/L 65.9 67.9 0.97 E6244-162 3rd/2008 Milk 1-131 pCi/L 71.0 67.9 1.05 E6244-162 3rd/2008 Milk Ce-141 pCi/L 163 161 1.01 E6244-162 3rd/2008 Milk Cr-51 pCi/L 395 421 0.94 E6244-162 3rd/2008 Milk Cs-134 pCi/L 206 232 0.89 E6244-162 3rd/2008 Milk Cs-137 pCi/L 164 162 1.01 E6244-162 3rd/2008 Milk Co-58 pCi/L 177 179 0.99 E6244-162 3rd/2008 Milk Mn-54 pCi/L 176 166 1.06 E6244-162 3rd/2008 Milk Fe-59 pCi/L 154 144 1.06 E6244-162 3rd/2008 Milk Zn-65 pCi/L 320 319 1.00 E6244-162 3rd/2008 Milk Co-60 pCi/L 230 234 0.98 E6245-162 3rd/2008 Milk Sr-89 pCi/L 59.6 73.9 0.81 E6245-162 3rd/2008 Milk Sr-90 pCi/L 9.9 11 0.90 C-7

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