U-603727, Annual Radiological Environmental Operating Report for 2004

Annual Radiological Environmental Operating Report for 2004

ML051240289
Person / Time
Site:	Clinton
Issue date:	04/20/2005
From:	Mcdowell M AmerGen Energy Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
FOIA/PA-2010-0209, U-603727
Download: ML051240289 (123)

Text

Amer(@eB An Exelon Company Clinton Power Station R. R.3, Box 228 Clinton, IL 61727 U-603727 April 20,2005 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Clinton Power Station Facility Operating License No. NPF-62 NRC Docket No. 50-461

Subject:

Clinton Power Station Annual Radiological Environmental Operating Report AmerGen Energy Company, LLC (AmerGen) is submitting the 2004 Annual Radiological Environmental Operating Report for Clinton Power Station. This submittal is provided in accordance with the requirements of section 5.6.2 of the Clinton Power Station Technical Specifications. This report covers the period from January 1, 2004 through December 31, 2004.

Respectfully, M. D. McDowell, Power Plant Manager Clinton Power Station EET/bIf Attachment cc: Regional Administrator - NRC Region IlIl NRC Senior Resident Inspector - Clinton Power Station Office of Nuclear Facility Safety - Illinois Department of Nuclear Safety

Exelon.

Nuclear 01 January 2004 - 31 December 2004 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT CLINTON POWER STATION - DOCKET NUMBER 50-461 Prepared by:

Clinton Power Station

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TABLE OF CONTENTS ITEM PAGE LIST OF TABLES 4 LIST OF FIGURES 5 I. EXECUTIVE

SUMMARY

6 II. INTRODUCTION 7 A. Characteristics of Radiation 7 B. Sources of Radiation Exposure 8 C. Description of the Clinton Power Station 12 D. Nuclear Reactor Operations 13 E. Containment of Radioactivity 16 F. Sources of Radioactive Effluents 17 G. Radioactive Waste Processing 17 III. RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 19 A. Program Description 19 B. Direct Radiation Monitoring 31 C. Atmospheric Monitoring 33 D. Aquatic Monitoring 37

• Fish 37

• Shoreline Sediments 38 E. Terrestrial Monitoring 38

• Milk 38

• Grass 39

• Vegetables 39 F. Water Monitoring 39

• Drinking Water 40

• Surface Water 40

• Well Water 41 G. Quality Assurance Program 43 H. Changes to the REMP During 2004 43 IV. 2004 ANNUAL LAND USE CENSUS 44 Summary of Changes 47 V. LIST OF REFERENCES 49

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TABLE OF CONTENTS (continued)

ITEM PAGE VI. APPENDICES A. 2004 Interlabatory Comparison Program Results 51 B. REMP Annual Summary 69

1. Sampling and Analysis Frequency Summary 70

2. Radiological Environmental Monitoring Program Annual Summary 73 C. Glossary 81 D. Exceptions to the REMP during 2004 84 E. CPS Radiological Environmental Monitoring Results during 2004 88

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LIST OF TABLES TABLE SUBJECT PAGE 1 Common Sources of Radiation 11 2-A CPS Radiological Environmental Monitoring Program Sampling Locations 27 2-B CPS Radiological Environmental Monitoring Program Sampling Locations 28 3-A CPS REMP Reporting Levels for Radioactivity Concentrations in Environmental Samples 29 3-B Detection Capabilities for Environmental Sample Analysis Lower Limit of Detection [LLD] 29 4 Average Quarterly TLD Results 32 5 Annual Average Gross Beta Concentrations in Air Particulates 35 6 Average Monthly Gross Beta Concentrations in Air Particulates 35 7 Average Gross Beta Concentrations in Drinking, Surface and Well Water 42 8 Annual Land Use Census Summary Results 46

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LIST OF FIGURES FIGURE SUBJECT PAGE 1 Dose Contributions to the U. S. Population from Principal Sources of Radiation Exposure 11 2 Clinton Power Station Basic Plant Schematic 15 3 Potential Exposure Pathways of Man Due to Releases of Radioactive Material to the Environment 21 4 REMP Sample Locations within 1 Mile 23 5 REMP Sample Locations from 1 - 2 Miles 24 6 REMP Sample Locations from 2 - 5 Miles 25 7 REMP Sample Locations Greater than 5 Miles 26 8 Direct Radiation Comparison 32 9 Air Particulate Gross Beta Activity Comparison 36

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1. EXECUTIVE

SUMMARY

This report describes the Annual Radiological Environmental Monitoring Program [REMP] conducted around the Clinton Power Station [CPS] during the 2004 calendar year. The REMP was performed as required by the CPS Operating License issued by the United States Nuclear Regulatory Commission [NRC]. The objective of the REMP is to assess the radiological impact upon the surrounding environment due to the operation of the Clinton Power Station.

During 2004, 1,461 environmental samples were collected. These environmental samples represented; direct radiation, atmospheric, terrestrial, and aquatic environments including Clinton Lake surface water and public drinking water sampling. Subsequently, 1,720 analyses were performed on these environmental samples.

Analytical results from these environmental samples revealed the presence of natural radioactivity and radioactivity attributed to other historical nuclear events. The radioactivity levels detected were similar to the Pre-Operational levels found prior to the operation of CPS. The CPS Pre-Operational REMP Report documented natural background radionuclides and man-made radioactivity in the environment surrounding CPS.

Radiological environmental measurements taken during 2004 demonstrated that both operational and engineered controls on the radioactive effluents released from the plant functioned as they were designed. Any radioactivity that was detected in the environment at Indicator Locations was appropriately compared with both the measurements at Control Locations and Pre-Operational results.

There were zero (0) radioactive liquid releases from CPS during 2004.

Releases of gaseous radioactive materials were accurately measured in plant effluents. There was no gaseous effluent releases that approached the limits specified in the CPS Offsite Dose Calculation Manual [ODCM]. The highest calculated offsite dose received by a member of the public due to the release of gaseous effluents from Clinton Power Station was 8.78E-04 [or 0.000878] mR

[milli-Roentgen].

All comparisons among Operational Data and Pre-Operational Data showed that during 2004, the operation of Clinton Power Station had no measurable effects upon the surrounding environment.

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11. INTRODUCTION The Radiological Environmental Monitoring Program [REMP] at Clinton Power Station [CPS] is designed to monitor the environment surrounding the plant for any radioactive material that may be released by CPS as a result of plant operations. The primary concern is what impact - if any - radioactive materials released from CPS may have on the general public.

A. CHARACTERISTICS OF RADIATION Atoms whose nuclei contain an excess of energy are called radioactive atoms. They release this excess energy by expelling electromagnetic or particulate radiation from their atomic centers to become stable [non-radioactive]. This process is called "radioactive decay". Gamma rays and X-rays are examples of electromagnetic radiation and are similar in many ways to visible light, microwaves, and radio waves. Particulate radiation may be either electrically charged such as an alpha or beta particle, or has no charge, like a neutron.

The term 'half-life' refers to the time required for half of a given amount of a radionuclide to decay. Some radionuclides have a half-life as short as a fraction of a second, while others have a half-life as long.as millions of years. Radionuclides may decay directly into stable elements or may undergo a series of decays until they ultimately reach a stable element.

Radionuclides are found in nature such as radioactive uranium, thorium, carbon, and potassium, and may also be produced artificially in accelerators and nuclear reactors such as radioactive iodine, cesium, and cobalt.

TYPICAL NATURALLY-; -TYPICAL MAN-MADE -.-

OCCURRING RADIONUCLIDES RADIONUCLIDES Uranium Iodine Thorium Cesium Carbon Cobalt Potassium Strontium Lead Barium The activity of a radioactive source is the average number of nuclear disintegrations [decay] of the source per unit of time. The unit of activity is called the curie. For example, a one-curie radioactive source undergoes 2.2 trillion disintegrations per minute. When compared against nuclear power plant effluents and environmental radioactivity however, this is a very large unit of measure. Therefore, two sub-fractional units - the microcurie and the picocurie - are more commonly used terms.

1 curie (Ci) = 2,220,000,000,000 disintegrations / minute 1 millicurie (mCi) = 2,220,000,000 disintegrations / minute 1 microcurie (liCi) = 2,220,000 disintegrations / minute 1 nanocurie (nCi) = 2,220 disintegrations / minute 1 picocurie (pCi) = 2.22 disintegrations / minute

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The microcurie [pCi] is one millionth of a curie [Ci] and represents 2.2 million decays per minute. The picocurie [pCi] is one millionth of a microcurie and represents 2.2 decays per minute. Another way of comparing the pCi and the Ci is by using an analogy with distances. A picocurie would be the width of a pencil mark while a curie would be the equivalent of 100 trips around the earth.

Radioactivity is related to the half-life and the atomic mass of a radionuclide. For example, Uranium-235 (U2" 5) with a half-life of 704 million years requires over a half ton - 1,019 pounds - to equate to an activity of one curie. Whereas lodine-131 (1'3') with a half-life of 8.04 days requires 0.0000000176 pounds to equate to an activity of one curie.

Any mechanism that can supply the energy necessary to ionize an atom, break a chemical bond or alter the chemistry of a living cell are capable of producing biological damage. Electromagnetic and particulate radiation can produce cellular damage in any of these ways. In assessing the biological effects of radiation, the type, energy, and amount of radiation must be considered.

External total body radiation involves exposure of all organs. Most background exposures are of this form. When radioactive elements enter the body through inhalation or ingestion, their distribution may not be uniform.

TARGET TISSUE NUCLIDE Bone Strontium-90 (Sr90)

Kidney Uranium-235 (U" 3 5 )

Thyroid: lodine-131 (1'31) .

Muscle and Liver Tissue Cesium-137 (Cs.')

Gastrointestinal Tract - Cobalt-60 (Co) 0)

For example, radio-iodine selectively concentrates in the thyroid gland, whereas radio-cesium collects in muscle and liver tissue and radio-strontium collect in mineralized bone. The quantity and the duration of time that the radionuclide remains in the body also influence the total dose to organs by a given radionuclide. When factoring radioactive decay and human metabolism factors, some radionuclides stay in the body for very short periods of time while others remain for years.

The amount of radiation dose that an individual receives is expressed in Rem. Since human exposure to radiation typically involves very small exposures, the millirem [mRem] is the unit most commonly used. One millirem is equal to one thousandth of a Rem.

B. SOURCES OF RADIATION EXPOSURE Many sources of radiation exposure exist. The most common and least controllable source is natural background radiation from cosmic rays and the earth which mankind has always lived with and always will. Every

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second of our lives, over seven thousand atoms undergo radioactive decay in the body of the average adult.

Radioactive elements have always been a part of our planet and everything that has come from the earth - including our own body - is therefore, naturally radioactive.

Natural Radionuclides in the Earth's Crust Potassium-40 (K40) Radium-226 (Ra226)

Uranium-238 (U238) Radon-222 (Rn222)

Thorium-232 (Th23 ) Lead-204 (Pb204)

Examples of radioactive materials found in the Earth's crust today consists of radionuclides such as Potassium-40, Uranium-238, Thorium-232, Radium-226 and Radon-222. These radionuclides are introduced into the water, soil and air by such natural processes as volcanic activity, weathering, erosion and radioactive decay.

Some of the naturally occurring radionuclides - such as radon - are a significant source of radiation exposure to the general public.

Radioactive radon is a chemically inert gas produced naturally in the ground as a part of the uranium and thorium decay series. Radon continues to undergo radioactive decay, producing new naturally radioactive materials called 'radon daughter products'. These new products - which are solid particles not gases - can adhere to surfaces such as dust particles contained in the air.

Concentrations of radon in the air vary and are affected by concentrations of uranium and thorium in the soil as well as altitude, soil porosity, temperature, pressure, soil moisture, rainfall, snow cover, atmospheric conditions and the time of the season. Radon can move through cracks and openings into basements of buildings and become trapped in small air volumes indoors. Thus, indoor radon concentrations are usually higher than those found outdoors. Building materials such as cinder blocks and concrete are radon sources. Radon can also be dissolved in well water and contribute to airborne radon in houses when released through showers or washing.

Dust containing radon daughter particles can be inhaled and deposited on the surface of an individual's lung. Radon daughters emit a high-energy alpha radiation dose to the inner lung lining. Table 1 illustrates the average annual effective dose due to radon radiation exposure.

About 300 cosmic rays originating from outer space pass through each person every second.

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Cosmic-Ray-Activated Radionucl ides Beryllium-7 (Be') Tritium (H3)

Beryllium-10 (Be'u) Sodium-22 (Na22 1 Carbon-14 (C'4 ) Phosphorus-32 (P 2)

The interaction of cosmic rays with atoms in the earth's atmosphere produces radionuclides such as Beryllium-7, Beryllium-10, Carbon-14, Tritium-3, and Sodium-22. Portions of these radionuclides become deposited on land or in water while the remainder stays suspended in the atmosphere.

Consequently, there are natural radioactive materials in the soil, water, air and building materials that contribute to radiation doses to the human body. Natural drinking water contains trace amounts of uranium and radium while milk contains measurable amounts of Potassium-40.

Sources of natural radiation and their average contributing radiation doses are also summarized in Table 1. Figure 1 graphically shows the percentage contribution from principal sources of radiation exposure to the general population of the United States. Radiation exposure levels from natural radiation fluctuate with time and can also vary widely from location to location. The average individual in the United States receives approximately 300 mRem per year, just from naturally occurring background radiation sources.

In some areas of the United States, the dose from natural radiation is significantly higher. Residents of Colorado - 5,000 feet above sea level

- will receive additional dose due to the increase of cosmic and terrestrial radiation levels. In fact, for every 1,000 feet in elevation above sea level, an individual will receive an additional one (1) mRem per year from cosmic radiation. In several areas of the world, high concentrations of mineral deposits result in natural background radiation levels of several thousand mRem per year.

In addition to natural background radiation, the average individual is exposed to radiation from a number of man-made sources. The largest of these sources come from medical diagnosis: X-rays, CAT-scans, fluoroscopic examinations and radio-pharmaceuticals. Approximately 160 million people in the United States are exposed to medical or dental X-rays in any given year. The annual dose to an individual from such irradiation averages approximately 53 mRem.

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TABLE 1 COMMON SOURCES OF RADIATION A. Average Annual Effective Dose Equivalent to the U.S. Population

1. Natural Sources mRem

a. Radon 200

b. Cosmic, Terrestrial, Internal 100

2. Man-Made Sources mrRem

a. Medical X-ray Diagnosis 39 Nuclear Medicine 14

b. Consumer Products 10

c. Occupational 1

d. Miscellaneous Environmental <1

e. Nuclear Fuel Cycle <1 Approximate Total 364 PERCENTAGE OF CONTRIBUTION surner Products (3%)

Nuclear Mericine (4%)

Radon (55%)

. XrayDiagnosis (11%)

OTHER Wl%)

M . En ionntal Sources

• Nuclear Fuel Cycle

• Occupanl Cosrnic, Terrestrial Internal (27%)

FIGURE 1: DOSE CONTINBUTONS TO THE U.S. POPULATION FROM PRINCIPAL SOURCES OF RADIATION EXPOSURE

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Smaller doses from man-made sources come from consumer products - such as televisions, smoke detectors, and fertilizers - as well as fallout from prior nuclear weapons testing, the production of nuclear power and its associated fuel cycle.

'Fallout' commonly refers to the radioactive debris that settles to the surface of the earth following the detonation of a nuclear weapon. Fallout is dispersed throughout the environment but can be washed down to the Earth's surface by rain or snow.

Radionuclides Found in Fallout lodine-131 (1131) Strontium-90 (Sr90)

Strontium-89 (Sr" 9) Cesium-137 (Cs 1 3 )

There are approximately 200 radionuclides produced in the nuclear weapon detonation process with a number of these detected as fallout.

The radionuclides found in fallout that produce the majority of the fallout radiation exposures to man are lodine-131, Strontium-89, Strontium-90, and Cesium-137.

C. DESCRIPTION OF THE CLINTON POWER STATION The Clinton Power Station [CPS] is located in Harp Township, DeWitt County, Illinois. It is approximately six (6) miles east of Clinton, Illinois.

The station - including the V-shaped cooling lake - coupled with the surrounding AmerGen Energy Company, LLC owned land encloses approximately 13,730 acres. This includes the 4,895 acre, man-made cooling lake and about 452 acres of property not owned by AmerGen. The plant is situated on approximately 150 acres on the northern arm of the lake. The cooling water discharge flume - which discharges to the eastern arm of the lake - occupies an additional 130 acres. Although the nuclear reactor, supporting equipment and associated electrical generation and distribution equipment lie in Harp Township, portions of the aforementioned 13,730 acre plot reside within Wilson, Rutledge, DeWitt, Creek, Nixon and Santa Anna Township[s].

The cooling lake was formed by constructing an earthen dam near the confluence of Salt Creek and at the North Fork of Salt Creek. The resulting lake has an average depth of 15.6 feet which includes an ultimate heat sink of approximately 590 acre-feet. The ultimate heat sink provides for a sufficient water volume and cooling capacity for approximately 30 days of operation without any makeup water.

Through arrangements made with the Illinois Department of Conservation, Clinton Lake and much of the area immediately adjacent to the lake are used for public recreation activities including swimming, boating, water-skiing, hunting and fishing. Recreational facilities exist at

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Clinton Lake and accommodate up to 11,000 people per day during peak usage periods. The outflow from Clinton Lake falls into Salt Creek and then flows in a westerly direction for about 56 miles before joining in with the Sangamon River. The Sangamon River drains into the Illinois River that enters the Mississippi River near Grafton, Illinois. The closest use of downstream water for drinking purposes is approximately 242 river miles downstream from Clinton Lake at Alton, Illinois as verified from the Illinois Environmental Protection Agency Public Water Service. Although some farms throughout the Salt Creek drainage area use irrigation water downstream of Clinton Lake, this irrigation water is drawn from wells and not directly from the waters of Salt Creek.

Approximately 810,000 individuals live within 50 miles of the Clinton Power. Station. Over half are located in the major metropolitan centers of Bloomington - Normal which is located approximately 23 miles to the north-northwest, Champaign - Urbana which is located approximately 31 miles towards the east, Decatur which is located approximately 22 miles to the south-southwest and Springfield which is located approximately 48 miles to the west-southwest. The nearest city is Clinton, the county seat of DeWitt County. The estimated population of Clinton is approximately 8,000 residents. Outside of the urban areas, most of the land within 50 miles of the Clinton Power Station is used for farming. The principal crops grown are corn and soybeans.

D. NUCLEAR REACTOR OPERATIONS The fuel of a nuclear reactor is made of the element uranium in the form of uranium oxide. The fuel produces power by the process called

'fission'. During fission, the uranium atom absorbs a neutron and splits to produce fission products, heat, radiation and free neutrons. The free neutrons travel in the reactor core and further absorption of neutrons by uranium permits the fission process to continue. As the fission process continues, more fission products, more radiation, more heat and more neutrons are produced and a sustained reaction occurs. The heat produced is extracted from the fuel to produce steam, which subsequently drives a turbine generator to produce electricity.

The fission products are predominantly radioactive. They are unstable elements that emit radiation as they change from unstable to stable elements. Stable atoms in the materials that make up the components and structures of the reactor may absorb neutrons that are not absorbed by the uranium fuel. In such cases, stable atoms often become radioactive. This process is called activation and the radioactive atoms, which result, are called activation products.

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Fission Products Activation Products Cesium-137 (Cs'3') Cobalt-60 (Co60)

Barium-140 (Ba' 40) Manganese-54 (Mn54)

Cerium-144 (Ce1 ") Iron-59 (Fe59)

Strontium-90 (Sr"0 ) Zinc-65 (Zn65)

The reactor at the Clinton Power Station is a Boiling Water Reactor

[BWR]. Figure 2 provides a basic plant schematic for the Clinton Power Station and shows the separation of the cooling water from plant water systems. In this type of reactor, the fuel is formed into small ceramic pellets that are loaded into sealed fuel rods.

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- - - -m - - - - -- J- -

Generator

• Steam Driven Turbine ll _ I ~

Control Condenser Rods Cooling Condenser syste Cn a

o FIGURE 2: CLINTON POWER STATION BASIC PLANT SCHEMATIC I I II

The fuel rods are arranged in arrays, called bundles, which are supported within the massive steel reactor vessel.

The voids between the fuel rods are filled with water. The heat released during the fission of fuel atoms is transferred to the water surrounding the fuel rods. A type of pump that has no moving parts - a jet pump - and recirculation water pumps are used to force the water to circulate through the fuel bundles to assure even cooling and heat removal from the fuel rods. Some of the water that absorbs heat from the fuel rods is changed to steam. The steam is used to drive a turbine that is coupled to a generator, thereby completing the conversion of nuclear energy released during fission into electricity.

After the steam passes through the turbine, it is condensed back into water and returned to the reactor vessel to repeat the cycle. As the water circulates through the reactor pressure vessel, corrosion allows trace quantities of the component and structure surfaces to mix into the water.

The corroded material also contains radioactive substances known as activated corrosion products. Radioactive fission and activation products are normally confined to the primary coolant system although small leaks from the primary system may occur.

E. CONTAINMENT OF RADIOACTIVITY During normal operating conditions, essentially all of the radioactivity is contained within the first of several barriers - that collectively - prevent radioactivity from escaping into our environment.

The fuel cladding - metal tubes - provides the first barrier. The ceramic fuel pellets are sealed within zircaloy metal tubes. There is a small gap between the fuel and the cladding where noble gases and volatile nuclides collect.

The reactor pressure vessel and the steel piping of the primary coolant system provide the second barrier. The reactor pressure vessel is a 70 foot high vessel with steel walls ranging from four (4) to seven (7) inches thick that encases the reactor core. The reactor pressure vessel and the steel piping provide containment for all radionuclides in the primary coolant.

The Containment Building provides the third barrier. The Containment Building has a steel-lined, four (4) foot thick reinforced concrete wall which completely enclose the reactor pressure vessel and vital auxiliary equipment. This structure provides a third line of defense against the uncontrolled release of radioactive materials to the environment. The massive concrete walls also serve to absorb much of the radiation emitted during reactor operations or from radioactive materials created during reactor operations.

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F. SOURCES OF RADIOACTIVE EFFLUENTS In an operating nuclear power plant, most of the fission products are retained within the fuel and fuel cladding. However, the fuel manufacturing process leaves traces of uranium on the exterior of the fuel tubes. Fission products from the eventual fission of these traces may be released to the primary coolant. Other small amounts of radioactive fission products are able to diffuse or migrate through the fuel cladding and into the primary coolant. Trace quantities of the corrosion products from component and structural surfaces that have been activated, also get into the primary coolant.

Demineralizers from the water purification systems remove many soluble fission and activation products such as radioactive iodines, strontiums, cobalts and cesiums. Noble gas fission products, activated atmospheric gases introduced with reactor feedwater and some of the volatile fission products such as iodine and bromine, carry over from the reactor pressure vessel to the condenser.

The steam jet air ejectors remove the gases from the condenser and transfer them to the off-gas treatment system. Within the off-gas treatment system, these gases are held up by adsorption on specially treated charcoal beds to allow radioactive gases to decay before they are released through the main ventilation exhaust stack.

Small releases of radioactive liquids from valves, piping, or equipment associated with the primary coolant system may occur in the Containment, Auxiliary, Turbine, Rad Waste and Fuel Buildings. Noble gases become part of the gaseous wastes while the remaining radioactive liquids are collected in sumps and processed for reuse. Processed primary coolant water that does not meet chemical specifications for reuse may also become wastewater. These represent the principal sources of liquid effluents.

Information about radioactive effluents can be found in the Annual Radioactive Effluent Release Report. This report contains a detailed description of all radioactive releases from CPS and the resulting radiation doses for the reporting period.

G. RADIOACTIVE WASTE PROCESSING In a normal operating nuclear power plant, radioactive liquid and gaseous wastes are collected, stored and then processed through treatment systems to remove or reduce most of their radioactivity (excluding tritium) prior to reuse within the plant or discharged to the environment. These processing systems are required by the Clinton Power Station [CPS] Offsite Dose Calculation Manual [ODCM] to be installed and operable to help ensure all releases of radioactive liquid and gaseous effluents are As Low As Reasonably Achievable [ALARA]. As a matter of Station Policy, CPS strives to be a zero (0) liquid release plant and was able to accomplish that commitment throughout 2004.

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The liquid waste treatment systems consist of filters, demineralizers and evaporators. Liquid wastes are routed through the waste evaporators to be degassed and distilled thereby reducing their volume and concentrating their radioactivity. The distillates are further treated through demineralizers and filters and transferred to the waste evaporator condensate storage tanks. Liquid wastes are processed through the appropriate portions of the liquid waste treatment system to provide assurance that the releases of radioactive materials in liquid effluents will be kept ALARA.

Liquid wastes may be discharged into the plant cooling water stream that varies from approximately 5,000 gallons per minute - when the unit is shutdown - to 567,000 gallons per minute when the unit is at full power. If a planned release were to occur, liquid effluents would be thoroughly mixed with - and diluted by - the plant cooling water as it traverses down a 3.4 mile discharge canal before entering Clinton Lake east of DeWitt County Road 14.

The Clinton Power Station Offsite Dose Calculation Manual requires that liquid effluents will not have a higher concentration of any radioisotope than which is established for continuous exposure to the general public.

This requirement is satisfied at the point in which the liquid effluent is first introduced to the cooling water flow. Thus, this additional dilution - which occurs along the 3.4 mile cooling water canal - further reduces the original concentration~s] of radioisotopes by 1/73 [at minimum flow during unit shutdown] and by 1/1890 (at maximum flow during unit operation] prior to the water entering Clinton Lake.

The concentrated radioactive solids captured from the liquid waste treatment system are processed and temporarily stored on-site until scheduled for shipment off-site for disposal at a licensed low-level waste disposal facility.

The gaseous effluents from the main condenser are held up in the off-gas charcoal beds for a minimum of 46 hours5.324074e-4 days <br />0.0128 hours <br />7.60582e-5 weeks <br />1.7503e-5 months <br />. With most of the radionuclides present having a radioactive half-life of less than eight (8) hours, this hold up process allows for their radioactive decay. If the gaseous effluents from the ventilation exhaust system for the Containment Building and Secondary Containment structure exceed conservatively established set points, these effluents are processed through charcoal beds and High Efficiency Particulate Air [HEPA] filters within the Standby Gas Treatment System before being released to the environment.

The combination of HEPA filters and charcoal bed filtration is rated to be 95% efficient for removing iodines and greater than 99% efficient for removing any particulate material that is larger than one micron [one millionth of one inch] in diameter.

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III. RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM A. Program Description The Clinton Power Station is required to maintain a Radiological Environmental Monitoring Program [REMP] in accordance with the Code of Federal Regulations (CFR) Title 10, Section 20.1501 and Criterion 64 of CFR Title 10, Part 50, Appendix A. The program was developed using the following guidance published by the United States Nuclear Regulatory Commission [USNRC]:

• Regulatory Guide 4.1, "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants"

• USNRC Radiological Assessment Branch Technical Position on Radiological Environmental Monitoring (1979)

The REMP is an extensive program of sampling, measuring and analyzing that was instituted to monitor the radiological impact of reactor operationis] on the surrounding environment. Objectives of the program include the following:

• identification, measurement and evaluation of existing radionuclides in the environment of the Clinton Power Station and fluctuations in radioactivity levels that may occur

• evaluation of the measurements to determine the impact of Clinton Power Station operations relative to the local radiation environment

• collection of data needed to refine environmental radiation transport models used in offsite dose calculations

• verification that radioactive material containment systems are functioning to minimize environmental releases to levels that are ALARA

• demonstration of compliance with regulations and the Clinton Power Station Offsite Dose Calculation Manual Implicit in these objectives are the requirements to trend and assess radiation exposure rates and radioactivity concentrations in the environment that may contribute to radiation exposure to the public. The program consists of two (2) phases, Pre-Operational [Pre-Op] and Operational.

The Pre-Operational portion of the program was initiated in May 1980 and was completed on 27 February 1987 to establish the baseline for the local radiation environment. Assessment of the operational impact of the Clinton Power Station on the radiation environment is based on data collected since the beginning of reactor operation[s]. The operational phase implements confirmatory measurements to verify that the in-station controls for the release of radioactive material are functioning as designed.

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AmerGen Energy Company, LLC currently maintains a contract with Environmental Inc. Midwest Laboratory, for the analysis of all radiological environmental samples. Environmental Inc. is located in Northbrook, Illinois. Samples are currently collected by AmerGen Energy Company personnel and then shipped to the Environmental, Inc. laboratory for analysis. After analysis, environmental samples are saved at the laboratory for a specified period of time in case any additional follow up analysis is required. Analytical results are then reported back monthly to CPS for review by the ODCM Program Manager.

Current regulatory guidance recommends evaluating direct pathways, or the highest trophic level in a dietary pathway, that contribute to an individual's dose. Figure 3 shows the basic pathways of gaseous and liquid radioactive effluents to the public. The "important pathways" selected are based primarily on how radionuclides move through the environment that will eventually expose the public - taking into consideration - man's use of the environment. The scope of the program includes the monitoring of five (5) environmental elements:

• direct radiation

• atmospheric

• aquatic

• terrestrial environments

• ground and surface water Each pathway is monitored at "Indicator" and "Control" Locations.

Indicator Locations are generally within a ten (10) mile radius of the station that is expected to mimic station effects, if any exist. Control Locations are located greater than ten (10) miles from the plant - far enough away - so as not to be influenced by station operations. These Control Location samples provide the basis by which to measure any fluctuations in radioactivity from Indicator Locations relative to natural phenomena and fallout. Thus any increase in radioactive material concentration from an Indicator Location may be - due in part - to station operations.

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I I

I RELEASES DILUTED BY ATI I1 I m AIRBORNE I ANIMALS (MILK, MEAT) JPLUME EXPOSURE RELEASES CLINTON POWER STATION to AND INHALATION I g CONSUMED Us I BY PEOPLE IV

'I LIQUID RELEASES t

PEOPLE I

RELEASES I CONSUME[

BY ANIMAU BY PE VMED DILUTED BY LAKE I CONSUMED it DRINKING WATER BY PEOPLE , *-FISH I

_E SHORELINE K i

_ EXPOSURE I

,_

I FIGURE 3: POTENTIAL EXPOSURE PATHWAYS OF MAN DUE TO RELEASES OF RADIOACTIVE MATERIAL TO THE ENVIRONMENT I

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Co,0

Sampling locations were established by considering site meteorology, area population distribution, site hydrology, and land use characteristics of the local area. These locations were selected primarily on the basis of where the highest predicted environmental concentrations would occur.

Locations of sampling stations are shown on maps in Figures 4 through 7. Table[s] 2-A and 2-B provide information on sample location, media sampled at each of these location[s], and a brief description of each location where samples were taken. The location is listed according to distance (in miles) and the meteorological compass sector in relationship to the Station Heating, Ventilation, and Air Conditioning [HVAC] Vent.

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FIGURE 4: REMP SAMPLE LOCA TIONS WITHIN I MILE

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FIGURE 5: REMP SAMPLE L OCA TIONS FROM I - 2 MILES

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FIGUARE 6: REMP SAMPLE L OCA TIONS FROM 2 - 5 MIL ES

-- page 25 of 122 -- .4,

FIGURE 7: REMP SAMPLE L OCA TIONS GREA TER THAN 5 MIL ES

- page 26 of 122 --

TABLE 2-A CPS RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING LOCATIONS TLD Sites Station . . Distance' Station. siption Sector: (miles) Code Description Sector.

,,A.(miles).

Code., ICode v.:.,.:.

Supplemental CL-15 Control N 0.9 CL-44 Inner Ring SSE 2.3 CL-36 Inner Ring N 0.6 CL-56 Outer Ring SSE 4.1 Supplemental CL-37 Special Interest N 3.4 CL-114 Control SSE 12.5 CL-75 Special Interest N 0.9 CL-11 Control 5 16 CL-76 Outer Ring N 4.6 CL-45 Inner Ring S 2.8 Supplemental CL-3 Control NE 0.7 CL-57 Outer Ring S 4.6 CL-22 Inner Ring NE 0.6 CL-46 Inner Ring SSW 2.8 CL-78 Outer Ring NE 4.8 CL-58 Outer Ring SSW 4.3 Supplemental Supplemental CL-2 Control NNE 0.7 CL-97 Control SSW 10.3 Supplemental CL-5 Inner Ring NNE 0.7 CL-4 Control SW 0.8 Supplemental CL-77 Outer Ring NNE 4.5 CL-33 Control SW 11.7 Supplemental CL-99 Control NNE 3.5 CL-47 Inner Ring SW 3.3 CL-23 Inner Ring ENE 0.5 CL-60 Outer Ring SW 4.5 Supplemental CL-65 Special Interest ENE 2.6 CL-6 Control WSW 0.8 CL-79 Outer Ring ENE 4.5 CL-48 Inner Ring WSW 2.3 Supplemental CL-91 Control ENE 6.1 CL-61 Outer Ring WSW 4.5 Supplemental CL-8 Control E 2.2 CL-1 Inner ring W 1.8 CL-24 Inner Ring E 0.5 CL-49 Special Interest W 3.5 CL-41 Special Interest E 2.4 CL-74 Special Interest W 1.9 CL-53 Outer Ring E 4.3 CL-80 Outer Ring W 4.1 Supplemental CL-84 Control E 0.6 CL-34 Inner Ring WNW 0.8 CL-42 Inner Ring ESE 2.8 CL-64 Special Interest WNW 2.1 CL-54 Outer Ring ESE 4.6 CL-81 Outer Ring WNW 4.5 Supplemental CL-7 Control SE 2.3 CL-35 Inner Ring NW 0.7 CL-43 Inner Ring SE 2.8 CL-51 Outer Ring NW 4.4 CL-55 Outer Ring SE 4.1 CL-52 Outer Ring NNW 4.3 Supplemental CL-90 Control SE 0.4 CL-63 Inner Ring NNW 1.3

-- page 27 of 122 --

TABLE 2-B CPS RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING LOCATIONS Station l, , C e Ar Surface Drinking l Food Milk Ground d __ _ _ _ __on__ pC _ _ _ __ _ _ _ _ _ _ W ater.' W.ater Products _ _ _ ae CL-1 Camp Quest (1.8 miles W) X l CL-2 Site's main access road (0.7 miles NNE) 4 l CL-3 Site's secondary access road (0.7 miles NE)__ _ ___ _ _

CL-4 Residence near recreation area (0.8 miles SW)__ _ _ __ _ _ _

CL-6 CPS recreation area (0.7 miles WSW)

• CL-7 Mascoutin Recreation Area (2.3 miles CL7 SE ) _ _ _ __ _ _ _ _ _ _

CL-7D Mascoutin Recreation Area (2.3 miles 4 ESE)

CL-8 DeWitt Cemetery (2.2 miles E) 4/

CL Illinois Power substation (16 miles S)4 CL-12 DeWitt Pumphouse (1.6 miles E)

CL-1 3 Salt Creek bridge on Rt.10 (3.6 miles C-3SW)____

CL-14 Station Plant Service Building CL-15 Near residence on Rt. 900N (0.9 miles N)

CL-90 Start of discharge flume (0.4 miles SE) 4/

CL-91 Parnell Boat Access (6.1 miles ENE) 4/

CL-94 Old Clinton Road (0.6 miles E)

CL-99 North Fork canoe access area (3.5 miles C99 NNE) ____

CL-114- Residence in Cisco (12.5 miles SSE) 4 CL- 15 Site's secondary access road (0.7 miles C5L1 N E )_ _ _ _ _ _ _ _ _ _ _ _ _ _

CL-116 Pasture in rural Kenney (14 miles WSW) 4 CL-117 Resident north of site (0.9 miles N)

CL-118 Site's main access road (0.7 miles NNE) _ 4 Station I ~ '.Shoreline.-

'Code , Descri ption 1 Grass Fis hSediment CL-1 Camp Quest (1.8 miles W) .

CL-2 Site's main access road (0.7 miles NNE) _

CL-7B SE of site on Clinton Lake (2.1 miles 4

__ _ _ S E) _ _ _ _ _ _ _ _ _ _

CL-8 DeWitt Cemetery (2.2 miles E)

• CL-19 End of the discharge flume (3.4 miles E) v4 I CL-105 ' Lake Shelbyville (50 miles S)I 4 I CL-116 Pasture in rural Kenney (14 miles WSW) I __I _ I

• Control Location / ODCM required samples

• Supplemental non-ODCM required samples Note: Location[s] are listed by distance (in miles] along with meteorological sector from the Station's HVAC Vent.

-- page 28of 122 --

TABLE 3-A CPS REMP REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES

~.,Airborne Fish Milk -Food Products:

Analysis W Particulate or: (pCi/kg ' ( il) F pk wet)

(iI) Gases (pCi/rn5 ): wet)

H3 20,000' Mn54 1,000 --- 30,000 --- ---

Fe'9 400 --- 10,000 --- ---

Co5 1,000 30,000 Co60 300 --- 10,000 --- _---

Zn65 300 --- 20,000 ---

Zr/Nb95 400c --- --- ---

1131 2b 0.9 --- 3 100 Cs1'3 30 10 1,000 60 1,000 CS' 37 50 20 2,000 70 2,000 Ba/La 14 1 200c 300 a If no drinking water pathway exists, a value of 30,000 pCi/I may be used.

b If no drinking water pathway exists, a value of 20 pCi/I may be used.

c Total for parent and daughter.

TABLE 3-B DETECTION CAPABILITIES FOR ENVIRONMENTAL SAMPLE ANALYSISd LOWER LIMIT OF DETECTION (LLD)

AAirbeore. Fish Milk Food Sediment Anlyis Water. Pa-Multlok(,ik Products ('/k (iI) Gas (pCi/rn')": "wet): p~lg- ryiI

__ __ _ _ _ _ _ __ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _w e t) :d y)

Gross Beta 4 0.01 H3 2,000' Mn" 15 130 Fe"9 30 260 Co 5 Co"B 15 130 Zn6 30 260 Zr95 15 _

1131 1 0.07 1 60 Cs' 34 15 0.05 130 15 60 150 Cs' 37 18 0.06 150 18 80 180 Ba"'1 60 _60 60 La '4 15 . _ _ _ _ _ _ _ . _ _. _. 15 . _ _ _ _ _ _ _

d This list does not mean these nuclides are the only ones considered. Other nuclides are identified and reported when applicable.

e If no drinking water pathway exists, a value of 3,000 pCi/I may be used.

f If no drinking water pathway exists, a value of 15 pCi/I may be used.

-- page 29 of 122 -

-

Sample Analysis Concentrations of radioactivity present in the environment will vary due to factors such as weather conditions, variations in the sampling collection technique and during sample analysis.

Several types of measurements may be performed to provide information about the types of radiation and radionuclides present.

Analyses that are performed on environmental samples collected for the CPS REMP include the following:

• Gross beta analysis

• Gamma spectroscopy analysis

• Tritium analysis

• Strontium analysis

• Gamma dose (TLDs only)

A gross alpha and beta analysis measures the total amount of alpha and beta emitting radioactivity present in a sample. Both radiations may be released by many different radionuclides. Gross activity measurements

- while useful as a general trend indicator - are not used to establish specific radionuclide concentrations. Therefore, gross activity analysis will only indicate whether the sample contains normal or abnormal concentrations of alpha or beta emitting radioactivity and serves as a precursor in which to identify samples that may require additional follow up analysis.

Samples are primarily analyzed for plant-contributed radionuclides released to the environment. Irrespective of station operations and since naturally occurring radionuclides are abundant in all environmental samples, any positive result for a certain radionuclide, including gross alpha / beta measurements, will be discussed further in this section of the report.

-- page 30 of 122 --

B. Direct Radiation Monitoring Radionuclides present in the air - in addition to those deposited in or on top of the ground - cause human exposure by immersion in the atmosphere or by deposition on the ground. TLDs [Thermo-Luminescent Dosimeters] are used to measure the ambient gamma radiation levels at 54 locations surrounding Clinton Power Station.

TLDs are crystalline devices that store energy when they are exposed to radiation. They can be processed months after their exposure with a minimal loss of this collected information. This makes them well suited for quarterly environmental radiation measurements.

During TLD processing, stored energy is released as light and measured by a TLD reader. The light intensity is proportional to the radiation dose the TLD was exposed to. The TLDs used for environmental monitoring around the Clinton Power Station are capable of measuring environmental levels of radiation as low as approximately 20 mRem per quarter.

Monitoring stations are placed near the site boundary and approximately five (5) miles from the reactor, in locations representing the 16 meteorological compass sectors. Other locations are chosen to measure the radiation levels at places of special interest such as nearby residences, meeting places and population centers.

Control Locations are located further than ten (10) miles from the station so that they will not be influenced by Unit operations.

TLD measurements register the gamma ray exposure in milli-Roentgen [mR]. For reporting purposes mR is numerically equivalent to that of mRem. Consequently, these terms are used interchangeably throughout this Annual Report.

A total of 214 TLD measurements were made throughout 2004. The average quarterly dose from our Indicator Location[s] was 21.2 mrem. At our Control Locations, the average quarterly dose was also 21.2 mRem.

These quarterly measurements ranged from 19.3 to 22.9 mRem for Indicator TLDs and 19.2 to 23.0 mRem for Control TLDs.

Figure 8 compares the 2004 quarterly TLD results with our Pre-Operational TLD quarterly averages.

Average doses (+/- 2 standard deviations) - broken down by calendar quarter - are shown in Table 4 for both Indicator and Control Locations.

-- page 31 of 122 --

TABLE 4 AVERAGE QUARTERLY TLD RESULTS Average +/- 2a (mRem/quarter) 3ru 22.3 +/-3.7 23.0 +/- 3.9 19.1 +/- 4.7 14In 1 19.5 + 5.0 [ 20.4 +/- 3.0 l 17.8 +/-2.2 FIGURE 8: DIRECT RADIATION COMPARISON 50 45 _

40

• PRE-OP E 3 M 35 _ 2004 E 25 INDICATOR 20

• 2004 15 CONTROL 10 1St 2nd 3rd 4th QUARTER Given the above observations - and after factoring statistical variances - there were no significant increases in environmental gamma radiation levels resulting from Unit operations at the Clinton Power Station.

- page 32 of 122 --

C. Atmospheric Monitoring The inhalation and ingestion of radionuclides in the air is a direct exposure pathway to man. A network of ten (10) active Air Sampling Stations around the Clinton Power Station monitor this pathway. There are nine (9) 'Indicator' Air Sampling Station locations strategically placed in areas that are most likely to reveal any measurable effects due to the release of radioactive effluents from the Clinton Power Station. The

'Control' Air Sampling Station location is located approximately 16 miles south of the station in an area that is totally independent from any of the effects from station operations. Historical meteorological data further supports that this 'Control' Air Sampling Station location is upwind from the station.

Mechanical air samplers are used to draw a continuous volume of air through a filter and charcoal cartridge collecting any particulates and radioiodines that may be present in the atmosphere. These samplers are equipped with a pressure-sensing flow regulator to maintain a constant sampling rate of air flow of about one (1) cubic foot per minute (CFM). The total volume is then calculated based upon the amount of time the air sampler was in operation coupled with this flow rate. The air sampling equipment is maintained and calibrated by Clinton Power Station personnel using reference standards that are traceable back to the National Institute of Standards and Technology (NIST).

Air samples are collected every week and analyzed for gross beta and 1V"activities. Quarterly, all air particulate filters collected throughout this period are combined and counted for gamma isotopic activity. Since the intent of particulate sampling is to measure airborne radioactivity released from the station, the counting of short-lived daughter products -

produced by the decay of naturally occurring radon and thoron - may otherwise mask any station contributions. Therefore, particulate filters are not analyzed for at least five (5) days after their collection. This allows for the radioactive decay of naturally occurring short-lived daughter products, thus reducing any contribution interference to the overall gross beta activity.

Results from the gross beta airborne particulate analysis provides for comparisons between both Indicator and Control Locations - including those locations relative to spatial and temporal differences - throughout the year. These results are reported in units of pico-curies per cubic meter

[pCi/m 3]. The calculated annual average was 0.025 pCi/m3 for all Indicator Locations and 0.027 pCi/m 3 for the Control Location. These results are consistent with our Pre-Operational annual averages for both Indicator and Control Locations that were 0.027 pCi/m 3.

The location with the highest calculated annual average was measured at Indicator Location CL-1 that is located 1.8 miles west of Clinton Power Station. This location had a monthly average concentration of 0.027 pCi/m 3 . Individual location averages for 2004 are presented in Table 5.

- page 33 of 122 --

Minor fluctuations in the gross beta concentrations were noted throughout 2004. The general trend for average weekly gross beta concentrations from the Indicator Locations correlated to the trend for the Control Locations throughout the monitoring period. This correlation is evidenced by the similarity of the trends in the average monthly gross beta concentrations contained within Figure 9. There were no significant differences observed between these individual locations. Monthly averages for both Indicator and Control Locations for the 2004 year are presented in Table 6.

Fluctuations observed in the gross beta activity over the year can be attributed to changes in the environment, specifically during seasonal changes.

All gross beta concentrations for 2004 were found to be within normal background levels and no significant increases were noted as a result of station operations.

Naturally occurring Be' [Beryllium] was the only gamma-emitting radionuclide detected in the analysis of particulate filters.

No measurable contribution to the overall level of airborne particulate radioactivity was identified as a result of station operations. The radioactivity that was detected - naturally occurring Be' - is normally found in the environment and is consistent with the expected concentrations of natural radioactivity and fallout from prior atmospheric nuclear weapons testing.

-- page 34 of 122 --

TABLE 5 ANNUAL AVERAGE GROSS BETA CONCENTRATIONS IN AIR PARTICULATES Average +/- 2a (pCi/m 3 )

Station Description 2003 2004 CL-1 Camp Quest 0.026 +/- 0.009 0.027 +/- 0.011 CL-2 Site's Main Access Road 0.026 +/- 0.009 0.026 +/- 0.011 CL-3 Site's Secondary Access Road 0.027 +/- 0.009 0.026 +/- 0.011 CL-4 Residence near Recreation Area 0.025 +/- 0.009 0.025 +/- 0.012 CL-6 CPS Recreation Area 0.025 +/- 0.009 0.025 +/- 0.011 CL-7 Mascoutin Recreation Area 0.025 +/- 0.009 0.024 +/- 0.009 CL-8 DeWitt Cemetery 0.027 +/- 0.010 0.025 +/- 0.012 CL-11* Ameren / Illinois Power Substation 0.027 +/- 0.008 0.027 +/- 0.011 CL-15 Near Residence on Route 900N 0.025 +/- 0.008 0.025 +/- 0.009 CL-94 Old Clinton Road 0.026 +/- 0.008 0.025 +/- 0.010

• Control Station TABLE 6 AVERAGE MONTHLY GROSS BETA CONCENTRATIONS IN AIR PARTICULATES Average +/- 2o (pCi/m 3 )

MONTH 2003 Indicator 2004 Indicator 2003 Control 2004 Control January 0.031 +/-0.002 0.032 +/-0.007 0.032 +/-0.009 0.032 +/-0.016 February 0.025 +/-0.003 0.035 +/-0.003 0.025 +/-0.011 0.036 +/-0.015 March 0.027 +/-0.002 0.019 +/-0.001 0.027 +/-0.016 0.020 +/-0.008 April 0.019 +/-0.002 0.024 +/-0.004 0.020 +/-0.010 0.029 +/-0.031 May 0.018 +/-0.002 0.020 +/-0.002 0.020 +/-0.011 0.021 +/-0.015 June 0.022 +/-0.003 0.019 +/-0.002 0.027 +/-0.007 0.021 +/-0.006 July 0.023 +/-0.003 0.022 +/-0.002 0.027 +/-0.007 0.022 +/-0.012 August 0.027 +/-0.002 0.024 +/-0.003 0.027 +/-0.017 0.026 +/-0.012 September 0.030 +/-0.004 0.025 +/-0.002 0.031 +/-0.015 0.027 +/-0.008 October 0.027 +/-0.001 0.023 +/-0.002 0.029 +/-0.015 0.026 +/-0.007 November 0.030 +/-0.001 0.026 +/-0.002 0.033 +/-0.015 0.028 +/-0.008 December 0.030 +/-0.003 0.032 +/-0.003 0.028 +/-0.006 0.036 +/-0.006

- page 35 of 122-

A_ PRE-OP (ALL SITES)

-- +2004CONTROL

-*-2004 INDICATOR 0.052 0.047 -

0.042 -

0.037 0.

) 0.032 t 0.027 i 0.022 0.017 0.012 0.007 0.002 00 MONTH FIGURE 9: AIR PARTICULATE GROSS BETA ACTIVITYl COMPARISON

- page 36 of 122-Co5

D. Aquatic Monitoring The Clinton Power Station utilizes a man-made lake as the source of cooling water and returns this cooling water back to the same lake while most nuclear power stations use once-through flow methods from a river, an ocean or body of water much larger than Clinton Lake. If regulated radioactive liquid effluents were to be discharged from the Clinton Power Station into the cooling water outfall, long-lived radioisotopes could build up over a period time as the same water is reused on recurring trips through the station. Cooling water that exits from the plant will travel back into the eastern arm of Clinton Lake and then into the northern arm of the lake before returning back into the plant. Although the only user of Clinton Lake as a source of drinking water is CPS itself, Clinton Lake is a major recreational facility used for fishing, swimming, water skiing, boating and hunting.

Clinton Lake constitutes the primary environmental exposure pathway for radioactive materials from liquid effluents. Aquatic monitoring provides for the collection of fish and shoreline sediments to detect the presence of any radioisotopes related to the operation of the Clinton Power Station. These samples are analyzed for naturally occurring and man-made radioactive materials. Indicator samples were taken from various locations throughout Clinton Lake whereas the Control samples are obtained from Lake Shelbyville - approximately 50 miles south of Clinton Power Station - thus serving as an excellent data comparison to our station operations.

The overall concentrationisi of naturally occurring radioisotopes in samples collected near the Clinton Power Station were comparable to the concentrations in samples collected from the Control Location at Lake Shelbyville. The operation of Clinton Power Station had no measurable contribution to the radioactive inventory towards the aquatic environment.

Fish Various samples of fish are collected from Clinton Lake and Lake Shelbyville. From both lakes; our primary interest consists of largemouth bass, crappie, carp, and bluegill. The selections of these species are the fish most commonly harvested from the lakes by sporting fishermen. Fish will ingest both floating sediments and during feeding - prey on other organisms - that will also ingest sediments that may otherwise retain radionuclides. A radiological analysis from fish samples provides key information on the potential ingestion of radionuclides by humans via the aquatic pathway. These samples are collected semi-annually and analyzed by gamma spectroscopy.

The gamma spectroscopy analysis revealed that fish samples - from Clinton Lake and Lake Shelbeyville from 50 miles away - both identified the presence of naturally occurring K40 [Potassium] in all species. All other analytical results were less than the Lower Limit of Detection (LLD) for each radionuclide of interest.

-- page 37 of 122 --

Shoreline Sediments Samples of shoreline sediments are collected at Clinton Lake.

Radiological analyses of shoreline sediments provide information on any potential shoreline exposure to humans, determining long-term trends, and the accumulation of long-lived radionuclides from our environment.

Samples are collected semi-annually and then analyzed for gamma isotopic activities.

Shoreline sediment samples are dried prior to analysis and the results are reported in pCi/g [pico-curies per gram] dry weight. Only naturally occurring radioisotopes were present in samples taken at Clinton Lake.

E. Terrestrial Monitoring In addition to direct radiation, radionuclides that are present in our atmosphere expose individuals when they are deposited on plant and soil surfaces. Consuming animal products - such as meat and milk -

subsequently ingest them either directly by man or indirectly. To monitor this food ingestion pathway, samples of green leafy vegetables, grass and milk are analyzed.

Surface vegetation samples are collected monthly during the growing season from a number of locations for the purpose of monitoring the potential buildup of atmospherically deposited radionuclides. Because the radionuclides of interest - relative to Clinton Power Station operations -

are already present within our environment as a result of several decades of worldwide fallout or because they are naturally occurring, the presence of these radionuclides is anticipated from all of the samples that are collected. These samples are analyzed by gamma spectroscopy.

The gamma spectroscopy analysis revealed the presence of naturally occurring K"0 [Potassium] and Be' [Beryllium] in several samples.

All other analytical results were less than the Lower Limit of Detection (LLD) for each radionuclide. The operation of Clinton Power Station had no measurable contribution to the radioactive concentration of the terrestrial environment.

Milk There is no known commercial production of milk for human consumption within a five (5) mile radius of the Clinton Power Station.

However, milk samples are collected from a dairy located approximately 14 miles west-southwest of the station (twice a month during May through October and once a month during November through April to coincide with the grazing seasons). These samples are analyzed for I"31 and gamma isotopic activities.

The results from the analyses showed only naturally occurring K" and there was no 11"detected in any of the milk samples collected.

-- page 38 of 122 --

Grass In addition to milk samples, grass samples are also collected at three (3) Indicator Locations and at one (1) Control Location. These samples are collected twice a month during May through October and once a month during November through April (when available). Grass samples are analyzed for gamma isotopic activity including 1"'.

The results from the analyses showed only naturally occurring Be" and K4 in these samples. There was no I"31 detected in any of the grass samples collected.

Vegetables The Clinton Power Station obtains broadleaf vegetable samples from three (3) Indicator Locations and at one (1) Control Location. The Indicator Locations are located in the meteorological sectors with the highest potential for surface deposition and the Control Location is in a meteorological sector and distance - approximately 13 miles upwind -

which is considered to be unaffected by station operations. Samples are collected once a month during the growing season (June through September) and then are analyzed for gross beta and gamma isotopic activities including 1"3'.

The results from the analyses identified only naturally occurring Be7 and K40 from these samples. There was no I13' detected in any of the vegetable samples collected.

F. Water Monitoring Water monitoring provides for the collection of drinking water, surface water, and ground water (well water) samples to detect the presence of any radioisotopes relative to station operations at the Clinton Power Station.

The only identified user of water from Clinton Lake for domestic purposes is the Clinton Power Station. Samples taken are analyzed for naturally occurring and man-made radioactive isotopes. Average gross beta concentrations in surface, drinking and well water[s] are presented within Table 7 at the end of this section.

Water monitoring results show no measurable effects resulting from the operation of the Clinton Power Station.

-- page 39 of 122 --

Drinking Water A composite water sampler is located at the Station Service Building that collects a small - fixed volume - sample at hourly intervals. The sampler discharges each sample into a common sample collection bottle.

Therefore, the monthly sample analyzed by our independent laboratory service represents a composite of the individual samples that are collected throughout the month. This monthly composite sample is then analyzed for gross beta and gamma isotopic activities. A portion of each of these monthly samples is further mixed with the other monthly samples collected during each calendar quarter. This quarterly composite sample is then analyzed for H3 [Tritium].

Gross beta activity ranged from 0.8 to 2.5 pCi/I. These levels are attributed to very fine particles of sediment containing K40 that are not removed during the chlorination and filtration process.

The results from the H' and gamma-emitting radioisotope analysis were all less than the Lower Limit of Detection (LLD).

Surface Water Composite Water Samplers are installed at three (3) locations sampling surface water from Clinton Lake. These Composite Water Samplers collect a small volume of surface water at regular intervals and discharge the sample into a large sample collection bottle. Monthly, this water is then collected.

Two (2) of the Composite Water Samplers are located upstream from Clinton Power Station and are therefore unaffected by any plant liquid releases occurring downstream. The third Composite Water Sampler is positioned to sample water being released from the plant at the start of the plant discharge flume. Grab samples are also collected from one (1)

Indicator Location on Clinton Lake.

Surface water samples are analyzed for gamma isotopic and H3

[Tritium] activities. Additional analyses for 113' activity are performed on water samples taken from the discharge flume. Tritium analyses are performed quarterly from all of the monthly composites from all Water Composite Sample locations.

These results are attributed to naturally occurring K40 suspended as fine sediment particles in the water. Other types of samples - such as Shoreline Sediments - have further validated the presence of K" in Clinton Lake All samples analyzed for H3 [Tritium] were all less than the Minimum Detectable Activity (MDA). Pre-Operational H3 [Tritium] concentrations ranged from 141 to 279 pCi/I. As noted in Reference E187, previous nuclear weapons testing have increased the pre-1960 levels of Tritium (6 -

24 pCi/I) by a factor of approximately 50 to 300 - 1,200 pCi/l.

-- page 40 of 122 --

Gamma-emitting radioisotopes were all below the Lower Limits of Detection (LLD) and there was no 1'31 detected in any of the surface water samples that were collected.

Well Water Every quarter - both treated and untreated well water samples - are collected from the well serving the Village of DeWitt and from a well serving the Illinois Department of Conservation at the Mascoutin State Recreational Area. Samples are analyzed for H3 [Tritium] and gamma isotopic activities as required.

Gamma-emitting radioisotopes were all below the lower limits of detection (LLD) and there was no H3 detected in any of the well water samples that were collected.

-- page 41 of 122 --

TABLE 7 AVERAGE GROSS BETA CONCENTRATIONS IN DRINKING, SURFACE AND WELL WATER Average +/-2a (pCi/I)

STATION DESCRIPTION 2003 -2004 Drinking Water CL-14 Station Service Building 1.4 +/- 1.0 1.4 +/- 1.1 Fluctuations observed in the gross beta activity over the year can be attributed to changes in the environment, specifically during seasonal changes.

-- page 42 of 122 -

G. Quality Assurance Program To establish confidence and credibility that both the data collected and reported are accurate and precise, REMP activities are incorporated into the Quality Assurance (QA) program, which includes assessments, audits, and surveillances. The Quality Assurance program requires the following:

• Participation in inter-comparison programs, such as the Environmental Resource Associates (ERA) crosscheck program.

• Audits of analysis laboratory functions and their facilities.

• Periodic review of the Clinton Power Station procedures specifying sampling techniques.

• Duplicate analysis of all samples received (excluding TLDs).

This requirement is to validate laboratory precision.

• The routine counting of quality control samples.

The analytical results provided by the laboratory were reviewed monthly to ensure the required minimum sensitivities have been achieved and the proper analyses have been performed.

The station's Vendor - Environmental Inc., Mid-West Laboratory - has participated in interlaboratory comparison (crosscheck) programs since the formulation of their quality control program in December 1971. These programs are operated by agencies that supply environmental type samples - such as milk and water - containing concentrations of radionuclides that are only known by the issuing agency and not the participating laboratory. The purpose of such a program is to provide an independent check on the laboratory's analytical procedures and alert them to any possible problems.

Results from the 2004 Environmental Inc., Mid-West Laboratory cross-check program are shown in Appendix A of this report. CPS personnel have reviewed the 2004 results concluding the interlaboratory program utilized by Environmental Inc. effectively supports the 2004 REMP Program at CPS.

H. Changes to the REMP During 2004 Periodic revisions to the Radiological Environmental Monitoring Program [REMP] are necessary so as to maintain the monitoring of the environmental exposure pathways at the highest level of quality. Revisions may result from items identified during the performance of the Annual Land Use Census, incorporation of any revised or new regulatory requirement[s]

or from Quality Assurance Audits.

During the course of 2004, there were no changes made to the REMP program as delineated within the Off-Site Dose Calculation Manual.

-- page 43 of 122 -

IV. 2004 ANNUAL LAND USE CENSUS Each year an Annual Land Use Census is conducted to ensure that changes in the use of areas - at and beyond the site boundary - are identified and that any necessary modifications to the Radiological Environmental Monitoring Program [REMP] are made. The information gathered during the Annual Land Use Census is used for Radioactive Effluent Technical Specifications [RETS] dose assessments that feeds into the REMP ensuring that these programs accurately reflect the environment surrounding CPS.

The Annual Land Use Census is conducted during the growing season satisfying the CPS Offsite Dose Calculation Manual (ODCM) requirements. The Annual Land Use Census is conducted to identify the nearest milk animals, the nearest residence and the nearest garden of greater than 538 square feet that produce broadleaf vegetation - all within a distance of five (5) miles - in each of the sixteen (16) meteorological sectors.

The Annual Land Use Census shall also identify - within a distance of three (3) miles - the location in each of the 16 meteorological sectors all milk animals and all gardens of greater than 538 square feet that produce broadleaf vegetation.

A detailed summary of the Annual Land Use Census results is provided in a separate document that is permanently archived at CPS.

In order to assemble as much information as possible, the location of area residences, their critical age groups, milking animals, the size and vegetable content of gardens and along with livestock, were all recorded from each sector within five (5) miles, as stated above.

These land use parameters are then used in the assessment of potential radiological doses to individuals for the stated sectors. This information provides the most restrictive parameters used for dose assessments that will result in the highest calculated dose within each sector. Additional information regarding dose assessments to members of the public is provided within the 2004 CPS Annual Radioactive Effluent Release Report.

Area residents were surveyed who reside within a five (5) mile radius of the station by either direct contact, via a mail-in questionnaire, a telephone interview or direct observation within the 16 geographical sectors surrounding CPS. The information provided within this section of the report is a summary of the 2004 results from that census. The nearest residence, garden, and milk animal for each meteorological sector - out to a distance of five (5) miles - are illustrated in Table 8.

Data from the 2004 Annual Land Use Census was obtained using the following procedure:

• When mail-in response[s] were unresponsive, door-to-door canvassing of residences / land owners identified from the 2002 Annual Land Use Census was performed with a DeWitt County plat book available if needed.

• Telephone solicitations of persons who were unavailable during the 'door-to-door' survey or who did not mail back their questionnaire.

• .page 44 of 122 --

• By direct observation of land when the aforementioned methods proved to be unsuccessful. If an individual was unable to be contacted, data from the previous year was used.

• State and local agencies were solicited for information.

-- page 45 of 122 --

-

TABLE 8 ANNUAL LAND USE CENSUS

SUMMARY

RESULTS Sector Nearest Residence Nearest Garden Animal [miles] -

[miles] [miles] (Seea Notle)]

N 0.9 0.9 0.9 NNE 1.0 3.6 2.3 NE 1.3 1.3 3.4 ENE 1.8 2.6 4.1 E 1.0 2.5 1.0 ESE 3.2 3.3 N/A SE 2.8 4.4 2.9 SSE 1.8 2.8 2.8 S 3.0 3.0 N/A SSW 2.9 3.4 3.4 SW 0.7 3.6 3.6 WSW 1.6 2.2 3.4 W 1.6 2.0 N/A WNW 1.6 1.6 N/A NW 1.6 2.3 N/A NNW 1.7 2.3 1.3 N/A None identified within five (5) miles of CPS within this meteorological sector.

Note - Not used for human consumption The Annual Land Use Census results were validated to ensure that the REMP will provide representative measurements of radiation and radioactive materials from exposure pathways and for radionuclides that lead to the highest potential radiation exposure to the general public resulting from station operations.

After carefully reviewing the Annual Land Use Census results - coupled with station effluent release data provided by the CPS Chemistry Department - an evaluation is conducted to ensure current ODCM sampling location requirements are adequate. As a result of that evaluation, no changes in REMP sampling locations were required.

- page 46 of 122 --

Summary of Changes Identified in 2004 Annual Land Use Census Nearest Residence Changes in census locations for the nearest residentfs] identified within the sixteen (16) geographical sectors and is indicated below:

2003 Census Location 2004 Census Location 2.4 miles SSE 1.8 miles SSE There were zero changes or additions to the REMP as a result of the Nearest Resident Census.

Garden Census Changes in census locations for the nearest garden were identified in eight (8) of the sixteen (16) geographical sectors and are indicated below:

2003 Census Location 2004 Census Location 2.9 miles NNE 3.6 miles NNE 2.1 miles NE 1.3 miles NE 1.0 miles E 2.5 miles E 4.1 miles S 3.0 miles S

> 5.0 miles SSW 3.4 miles SSW

> 5.0 miles SW 3.6 miles SW 2.0 miles WNW 1.6 miles WNW 3.7 miles NW 2.3 miles NW There were zero changes or additions to the REMP garden sampling locations as a result of the Garden Census.

-- page 47 of 122 --

Summary of Changes Identified in 2004 Annual Land Use Census (continued)

Milk Animal Census Milk animals within five (5) miles were identified in the sixteen (16) geographical sectors surrounding CPS. Eleven (11) locations were identified within this five (5) mile radius. Only milk animals were specifically identified for this report. Of the livestock identified, milk animals were being raised primarily for nursing [nursing of their calves] and were being used for meat production [for both their own use and sold commercially]. There were no residents that milked their animals for any human consumption. Other livestock raised in the area were identified, but will not be addressed within this report.

Changes in the census locations for the nearest livestock / dairy were identified in four (4) of the sixteen (16) geographical sectors and are indicated below:

2003 Census Location 2004 Census Location 4.4 miles SE 2.9 miles SE

> 5 miles SSE 2.8 miles SSE 2.1 miles W > 5 miles W 2.4 miles NW > 5 miles NW No changes or additions to REMP milk sampling locations were made as a result of the Milk Animal Census.

- page 48 of 122 --

V. LIST OF REFERENCES

• American National Standards Institute, Inc., "Performance, Testing and Procedural Specifications for Thermoluminescent Dosimetry," ANSI N545-1975.

• Code of Federal Regulations, Title 10, Part 20 (Nuclear Regulatory Commission).

• CPS 2001 Annual Radioactive Effluent Release Report.

• "Environmental Radioactivity," M. Eisenbud, 1987 (EI87).

• "Natural Radon Exposure in the United States," Donald T. Oakley, U.S.

Environmental Protection Agency. ORP/SID 72-1, June 1972.

• Federal Radiation Council Report No. 1, "Background Material for the Development of Radiation Protection Standards," May 13, 1960.

• International Commission on Radiological Protection, Publication 2, "Report of Committee II on Permissible Dose for Internal Radiation," (1959) with 1962 Supplement issued in ICRP Publication 6; Publication 9, "Recommendations on Radiation Exposure," (1965); ICRP Publication 7 (1965), amplifying specific recommendations of Publication 26 (1977).

• International Commission on Radiation Protection, Publication No. 39 (1984),

"Principles of Limiting Exposure to the Public to Natural Sources of Radiation."

• "Radioactivity in the Environment: Sources, Distribution and Surveillance,"

Ronald L. Kathren, 1984.

• National Council on Radiation Protection and Measurements, Report No. 22, "Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air and Water for Occupational Exposure,"

(Published as National Bureau of Standards Handbook 69, issued June 1959, superseding Handbook 52).

• National Council on Radiation Protection and Measurements, Report No. 39, "Basic Radiation Protection Criteria," January 1971.

• National Council on Radiation Protection and Measurements, Report No. 44, "Krypton-85 in the Atmosphere - Accumulation, Biological Significance, and Control Technology," July 1975.

• National Council on Radiation Protection and Measurements, Report No. 91, "Recommendations on Limits for Exposure to Ionizing Radiation," June 1987.

• National Council on Radiation Protection and Measurements, Report No. 93, "Ionizing Radiation Exposure of the Population of the United States,"

September 1987.

-- page 49 of 122 --

• National Research Council, 1990, Committee on Biological Effects of Ionizing Radiation (BEIR V), Board on Radiation Effects Research on Life Sciences, "The Effects of Exposure to Low Levels of Ionizing Radiation".

• United States Nuclear Regulatory Commission, Regulatory Guide 4.1, "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants," Revision 1, April 1975.

• United States Nuclear Regulatory Commission, Regulatory Guide 4.13, "Performance, Testing and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications," Revision 1, July 1977.

• United States Nuclear Regulatory Commission, Regulatory Guide 1.109, "Calculation of Annual Dose to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR Part 50, Appendix I," Revision 1, October 1977.

• United States Nuclear Regulatory Commission Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program," Revision 1, November 1979.

• United States Nuclear Regulatory Commission , Regulatory Guide 4.15, "Quality Assurance for Radiological Monitoring Programs (Norm Operations) -

Effluent Streams and the Environment," Revision 1, February 1979.

• Technical Specification, Clinton Power Station, Unit No. 1, Docket No. 50-461, Office of Nuclear Reactor Regulation, 1986.

• Clinton Power Station, Updated Safety Analysis Report.

• Clinton Power Station, Unit 1, Off-Site Dose Calculation Manual.

-- page 50 of 122 --

\

Environmental, Inc.

Mdwest Laboratory an Albgheny Technodoges Co.

70 Landweh Road *NoilhbooI,.L D6O22 347)85640700 fa (847)564-4517 APPENDIX A INTERLABORATORY COMPARISON PROGRAM RESULTS NOTE: Environmental Inc., Midwest Laboratory participates in intercomparison studies administered by Environmental Resources Associates, and serves as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada. Results are reported in Appendix A. TLD Intercomparison results, in-house spikes, blanks, duplicates and mixed analyte performance evaluation program results are also reported. Appendix A is updated four times a year; the complete Appendix Is Included in March, June, September and December monthly progress reports only.

January through December, 2004

-- page 51 of 122 --

Appendix A Interlaboratorv Comparison Program Results Environmental, Inc., Midwest Laboratory, formerly Teledyne Brown Engineering Environmental Services Midwest Laboratory has participated In Interlaboratory comparison (crosscheck) programs since the formulation of it's quality control program in December 1971. These programs are operated by agencies which supply environmental type samples containing concentrations of radionuclides known to the Issuing agency but not to participant laboratories. The purpose of such a program is to provide an independent check on a laboratory's analytical procedures and to alert it of any possible problems.

Participant laboratories measure the concentration of specified radionuclides and report them to the issuing agency. Several months later, the agency reports the known values to the participant laboratories and specifies control limits. Results consistently higher or lower than the known values or outside the control limits indicate a need to check the instruments or procedures used.

Results in Table A-1 were obtained through participation Inthe environmental sample crosscheck program administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

The results in Table A-2 list results for thermoluminescent dosimeters (TLDs), via International Intercomparison of Environmental Dosimeters, when available, and internal laboratory testing.

Table A-3 lists results of the analyses on in-house "spiked" samples for the past twelve months. All samples are prepared using NIST traceable sources. Data for previous years available upon request.

Table A-4 lists results of the analyses on in-house "blank" samples for the past twelve months. Data for previous years available upon request.

Table A-5 list results of the in-house "duplicate" program for the past twelve months. Acceptance is based on the difference of the results being less than the sum of the errors. Data for previous years available upon request.

The results in Table A-6 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

The results In Table A-7 were obtained through participation in the Environmental Measurement Laboratory Quality Assessment Program.

Attachment A lists acceptance criteria for "spiked" samples.

Out-of-limit results are explained directly below the result.

Al

-- page 52 of 122 --

Attachment A K2 ACCEPTANCE CRITERIA FOR "SPIKED" SAMPLES LABORATORY PRECISION: ONE STANDARD DEVIATION VALUES FOR VARIOUS ANALYSESa

One standard deviation Analysis Level for single determination Gamma Emitters 5 to 100 pCiliter or kg 5.0 pCi/liter

> 100 pCi/liter or kg 5% of known value Strontium_89b 5 to 50 pCi/liter or kg 5.0 pCifliter

> 50 pCi/liter or kg 10% of known value

I Strontium-90b 2 to 30 pCi/liter or kg 5.0 pCifliter

> 30 pCi/liter or kg 10% of known value

• Potassium-40 2 0.1 goliter or kg 5% of known value Gross alpha 5 20 pCi/liter 5.0 pCi/liter

> 20 pCi/liter 25% of known value Gross beta 5 100 pCi/liter 5.0 pCi/liter

> 100 pCi/liter 5% of known value Tritium s 4,000 pCi/liter 1a l = (pCi/liter) =

169.85 x (known) 00933

> 4,000 pCi/liter 10% of known value Radium-226,-228 2 0.1 pCiliter 15% of known value Plutonium 2 0.1 pCi/liter, gram, or sample 10% of known value lodine-131, 5 55 pCi/liter 6.0 pCifliter lodine-1 2 9 b > 55 pCi/liter 10% of known value

Uranium-238, < 35 pCi/liter 6.0 pCi/liter Nickel-63b > 35 pCi/liter 15% of known value Technetium.99b Iron-55b 50 to 100 pCi/liter 10 pCi/liter

> 100 pCi/liter 10% of known value LI Othersb 20% of known value

From EPA publication, 'Environmental Radioactivity Laboratory Intercomparison Studies Program, Fiscal Year, 1981-1982, EPA-60014-81-004.

b Laboratory limit.

A2 -- page 53 of 122 --

TABLE A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)".

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Resultb Result' Limits STW-1005 02/17104 Sr-89 36.5 +/- 6.5 44.9 +/- 4.5 36.2 - 53.6 STW-1005 02/17/04 Sr-90 13.4 +/- 0.8 11.6 +/- 1.2 2.9 -20.3 STW-1006 02/17/04 Ba-1 33 60.9 +/- 2.8 63.2 +/- 6.3 52.3 - 74.1 STW-1006 02/17/04 Co-60 95.2 +/- 1.5 96.4 +/- 9.6 87.7 - 105.0 STW-1006 02/17/04 Cs-1 34 71.2 +/- 5.4 75.8 +/- 7.6 67.1 - 84.5 STW-1006 02/17/04 Cs-1 37 157.0 +/- 6.5 155.0 +/- 15.5 142.0 - 168.0 STW-1006 02/17/04 Zn-65 103.0 +/- 1.1 102.0 +/- 10.2 84.4 - 120.0 STW-1007 02/17/04 Gr. Alpha 15.6 +/- 1.2 16.6 +/- 1.7 7.9 - 25.3 STW-1007 02/17/04 Gr. Beta 46.3 +/- 4.4 41.5 +/-4.2 32.8 - 50.2 STW-1008 02/17/04 Ra-226 8.7 +/- 0.2 9.3 +/- 0.0 6.9 - 11.7 STW-1008 02/17/04 Ra-228 16.6 +/- 0.4 18.2 +/- 1.8 10.3 - 26.1 STW-1 008 02/17/04 Uranium 34.2 +/- 0.8 33.0 +/- 3.3 27.8 - 38.2 STW-1015 05/18/04 Sr-89 39.7 +/- 3.3 45.9 +/- 5.0 37.2 - 54.6 STW-1015 05/18/04 Sr-90 12.4 +/- 0.9 11.6 +/-5.0 2.9 - 20.3 STW-1016 05/18/04 Ba-133 96.9 +/- 2.4 101.0 +/- 10.1 83.5 - 118.0 STW-1016 05/18/04 Co-60 39.9 +/- 0.5 41.6 +/- 5.0 32.9 - 50.3 STW-1016 05/18/04 Cs-1 34 48.8 +/- 0.8 50.5 +/- 5.0 41.8 - 59.2 STW-1016 05/18/04 Cs-1 37 82.6 +/- 2.3 82.5 +/- 5.0 73.8 - 91.2 STW-1016 05/18/04 Zn-65 77.5 +/- 1.5 75.2 +/- 7.5 62.2 - 88.2 STW-1017 05/18/04 Gr. Alpha 32.4 +/- 2.1 38.8 +/- 9.7 22.0 - 55.6 STW-1017 05/18/04 Gr. Beta 63.4 +/- 3.5 59.6 +/- 10.0 42.3 - 76.9 STW-1018 05/18104 1-131 25.2 +/- 0.4 25.1 +/- 3.0 19.9 - 30.3 STW-1019 05/18/04 Ra-226 16.0 +/- 1.1 17.3 +/- 2.6 12.8 - 21.8 STW-1019 05/18/04 Ra-228 12.6 +/- 0.9 10.3 +/-2.6 5.8 - 14.8 STW-1019 05/18/04 Uranium 13.0 +/- 0.0 12.7 +/- 3.0 7.5 - 17.9 STW-1020 05/18/04 H-3 32043 +/- 166 30900 +/- 3090 25600 - 36200 STW-1028 08/17/04 Sr-89 16.1 +/-1.9 20.0 +/- 2.0 11.3 -28.7 STW-1028 08/17/04 Sr-90 13.4 +/-0.1 13.6 +/- 1.4 4.9 - 22.3 STW-1029 08/17/04 Ba-133 30.2 +/- 3.9 32.1 +/- 3.2 23.4 - 40.8 STW-1029 08/17/04 Co-60 24.9 +/- 1.9 24.0 +/- 2.4 15.3 - 32.7 STW-1029 08/17/04 Cs-1 34 21.4 +/-3.4 21.6 +/-2.2 12.9 - 30.3 STW-1029 08/17/04 Cs-137 205.6 +/- 4.3 193.0 +/- 19.3 176.0 - 210.0 STW-1029 08/17/04 Zn-65 145.5 +/- 3.0 143.0 +/- 14.3 118.0 - 168.0 STW-1030 08/17/04 Gr. Alpha 47.7 +/- 9.1 57.0 +/- 5.7 32.3 - 81.7 STW-1030 08/17/04 Gr. Beta 28.1 +/- 2.5 20.0 +/- 2.0 11.3 - 28.7 STW-1030 08/17/04 Gr. Beta 28.1 +/- 2.5 20.0 +/- 2.0 11.3 - 28.7 STW-1031 08/17/04 Ra-226 6.9 +/-0.5 6.3 +/- 0.6 4.6 - 7.9 STW-1031 08/17/04 Ra-228 13.1 +/-1.4 14.7 +/- 1.5 8.3 - 21.1 STW-1031 08/17/04 Uranium 6.0 +/- 0.1 6.2 +/- 0.6 1.0 -11.4

-- page 54 of 122 --

Al-1

TABLE A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)".

Concentration (pC/L)

• Lab Code Date Analysis Laboratory ERA Control Resulb Result' Limits STW-1037 11/15/04 Sr-89 42.2 +/- 3.5 45.7 +/- 5.0 37.0 - 51.5 STW-1037 11/15/04 Sr-90 37.3 +/- 1.3 36.6 +/- 5.0 27.9 - 45.3 STW-1038 11/15/04 Ba-133 75.5 +/- 0.8 78.4 +/- 7.8 64.8 - 92.0 STW-1038 11/15/04 Co-60 12.2 +/-0.7 11.7 +/-5.0 3.0 -20.4 STW-1038 11/15/04 Cs-134 43.6 +/- 0.5 42.9 +/- 5.0 34.2 - 51.6 STW-1038 11/15/04 Cs-137 59.5 +/-2.9 60.1 +/-5.0 51.4 -68.8 STW-1038 11/15/04 Zn-65 50.7 +/- 3.2 50.9 +/- 5.1 42.1 - 59.7 STW-1039 11115/04 Gr. Alpha 23.9 +/- 2.2 31.7 +/- 7.9 18.0 - 45.4 STW-1039 11/15/04 Gr. Beta 35.8 +/- 1.3 36.3 +/- 5.0 27.6 -45.0 STW-1040 11/15/04 1-131 22.4 +/- 1.9 22.0 +/- 5.0 16.9 -27.3 STW-1041 11/15/04 Ra-226 9.8 +/- 0.4 9.2 +/- 1.4 6.8 - 11.6 STW-1041 11/15/04 Ra-228 8.6 +/- 0.3 7.1 +/- 1.8 7.0 - 10.2 STW-1041 11/15/04 Uranium 11.1 +/-0.3 11.4 +/-3.0 6.2 - 16.6 STW-1042 11/15/04 H-3 21218.0 +/- 285.0 20700.0 +/- 2070.0 17100.0 -24300.0

' Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing indrinking water conducted by Environmental Resources Associates (ERA).

b Unless otherwise Indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

c Results are presented as the known values, expected laboratory precision (1sigma, 1 determination) and control limits as provided by ERA.

A1-2 -- page 5s of 122 --

TABLE A-2. Crosscheck program results; Thermoluminescent Dosimetry, (TLDs).

mR Lab Code TLD Type Date Known Lab Result Control Description Value +/- 2 sigma Limits Environmental, Inc.

2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,120 4.69 4.74 +/- 0.54 3.28 - 6.10 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,150 3.00 3.02 +/- 0.20 2.10 - 3.90 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,180 2.08 1.89 +/- 0.45 1.46 -2.70 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,180 2.08 2.11 +/- 0.22 1.46 - 2.70 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,30 75.00 84.40 +/- 4.87 52.50 - 97.50 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,60 18.75 19.11 +/-1.86 13.13 - 24.38 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,60 18.75 22.82 +/- 5.41 13.13 - 24.38 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1,90 8.33 9.05 +/- 1.17 5.83 - 10.83 2003-1 CaSO4: Dy Cards 08/08/2003 Reader 1.90 8.33 7.60 +/- 1.08 5.83 - 10.83 Environmental, Inc, 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,30 61.96 73.50 +/- 2.58 43.37 - 80.55 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,60 15.49 19.70 +/- 0.51 10.84 - 20.14 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,60 15.49 16.93 +/- 1.37 10.84 - 20.14 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,90 6.88 8.06 +/- 0.60 4.82 - 8.94 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,90 6.88 6.64 +/- 0.58 4.82 - 8.94 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,120 3.87 4.39 +/- 0.17 2.71 - 5.03 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,150 2.48 2.34 +/- 0.18 1.74 - 3.22 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,150 2.48 2.51 +/- 0.16 1.74 - 3.22 2003-2 CaSO4: Dy Cards 01/12/2004 Reader 1,180 1.72 2.01 +/- 0.13 1.20 - 2.24 Environmental Inc, 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 30 cm 55.23 61.07 +/- 4.38 38.66 - 71.80 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 30 cm 55.23 62.82 +/- 1.75 38.66 - 71.80 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 60 cm 13.81 14.10 +/- 0.56 9.67 - 17.95 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 60 cm 13.81 14.03 +/- 0.48 9.67 - 17.95 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 90 cm 6.14 5.97 +/- 0.21 4.30 - 7.98 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 90 cm 6.14 6.26 +/- 0.14 4.30 - 7.98 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 120 cm 3.45 4.40 +/- 0.63 2.42 - 4.49 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 150 cm 2.21 2.34 +/- 0.12 1.55 - 2.87 2004-1 CaSO4: Dy Cards 07/12/2004 Reader 1, 180 cm 1.53 1.65 +/- 0.02 1.07 - 1.99 A2-1 -- page 56 of 122 --

TABLE A-3. In-House Spike Samples Concentration (pCi/L)a Lab Code Sample Date Analysis Laboratory results Known Control Type 2s, n=lb Activity Limitsc SPVE-707 Vegetation 02/20/2004 1-131(G) 5.68 +/-0.15 4.93 2.96 - 6.90 SPCH-711 Charcoal 02/20/2004 1-131(G) 6.35 +/-0.11 6.94 0.00 - 16.94 SPW-721 water 02/20/2004 Ni-63 161.00 +/- 13.20 169.00 101.40 - 236.60 SPAP-733 Air Filter 02/25/2004 Gr. Beta 1.39 +/- 0.02 1.48 0.00 - 11.48 SPW-735 water 02/25/2004 Cs-I 34 41.59 +/- 7.02 39.10 29.10 - 49.10 SPW-735 water 02/25/2004 Cs-i 37 64.11 +/- 7.39 64.56 54.56 - 74.56 SPW-735 water 02/25/2004 1-131 36.55 +/- 0.48 40.08 28.08 - 52.08 SPW-735 water 02/25/2004 1-131 41.97 +/- 8.93 40.08 28.08 - 52.08 SPMI-737 Milk 02/25/2004 Cs- 34 37.40 +/- 5.40 39.10 29.10 - 49.10 SPMI-737 Milk 02/25/2004 Cs- 37 69.13 +/-9.58 64.56 54.56 - 74.56 SPMI-737 Milk 02/25/2004 1-131 45.03 +/- 0.53 40.08 28.08 - 52.08 SPMI-737 Milk 02/25/2004 1-131 44.43 f 9.22 40.08 28.08 - 52.08 SPW-1109 water 03/18/2004 Fe-55 39.98 +/- 1.72 39.98 23.99 - 55.97 SPW-1 496 water 04/07/2004 H-3 80006.60 +/- 776.00 83896.00 67116.80 - 100675.20 SPMI-1 683 Milk 04/16/2004 Sr-90 42.80 +/- 1.81 43.43 34.74 - 52.12 SPW-1 683 water 04/16/2004 1-131 54.47 +/-0.73 66.60 53.28 - 79.92 SPW-1 683 water 04/16/2004 1-131 (G) 65.82 +/- 8.86 66.60 56.60 - 76.60 SPMI-1685 Milk 04/16/2004 Cs-134 33.60 +/- 4.24 37.29 27.29 - 47.29 SPMI-1685 Milk 04/16/2004 Cs-137 61.77 +/- 7.59 64.36 54.36 - 74.36 SPMI-1 685 Milk 04/16/2004 1-131 65.85 +/- 0.79 66.60 53.28 - 79.92 SPMI-1685 Milk 04/16/2004 1-131 (G) 75.56 +/- 11.86 66.60 56.60 - 76.60 SPMI-1685 Milk 04/16/2004 Sr-90 42.56 +/- 1.66 43.43 34.74 - 52.12 SPW-1 686 water 04/16/2004 Cs- 34 39.31 +/-4.35 37.29 27.29 - 47.29 SPW-1 686 water 04/16/2004 Cs- 37 67.73 +/- 7.92 64.36 54.36 - 74.36 SPVE-1862 Vegetation 04/26/2004 1-131 (G) 1.32 +/- 0.03 1.12 0.67 -1.57 SPCH-1886 Charcoal 04/26/2004 1-131 (G) 2.90 +/- 0.07 2.80 1.68 - 3.92 SPAP-1888 Air Filter 04/27/2004 Gr. Beta 1.35 +/- 0.02 1.48 0.00 - 11.48 SPF-1917 Fish 04/29/2004 Cs- 34 1.44 +/- 0.04 1.47 0.88 - 2.06 SPF-1917 Fish 04/29/2004 Cs- 37 1.33 +/- 0.06 1.29 0.77 -1.81 SPW-3151 water 06/2412004 Fe-55 33.85 +/- 1.61 37.32 22.39 - 52.25 SPW-4232 water 08/04/2004 H-3 80225.00 +/- 785.00 82380.00 65904.00 - 98856.00 SPAP-4234 Air Filter 08/04/2004 Gr. Beta 1.63 +/- 0.02 1.46 0.00 - 11.46 SPW-5712 water 10/06/2004 Cs- 34 61.04 +/- 2.51 63.61 53.61 - 73.61 SPW-5712 water 10/06/2004 Cs- 37 62.01 +/-2.76 63.66 53.66 - 73.66 SPW-5712 water 10/06/2004 Sr-90 48.40 +/- 2.00 42.94 34.35 - 51.53 SPMI-5714 Milk 10/06/2004 Sr-90 41.61 +/-1.57 42.94 34.35 - 51.53 A3-1 -- page 57 of 122 --

TABLE A-3. In-House Spike Samples Concentration (pCi/L)

Lab Code Sample Date Analysis Laboratory results Known Control Type 2s, n=1b Activity Limitsc SPMI-7418 Milk 12/22/2004 Cs-134 59.09 +/-2.59 59.25 49.25 -69.25 SPMI-7418 Milk 12/22/2004 Cs-137 65.45 +/- 5.61 63.35 53.35 -73.35 SPW-7420 water 12/22/2004 Cs-134 58.42 +/- 1.99 59.25 49.25 - 69.25 SPW-7420 water 12/22/2004 Cs-1 37 64.26 +/- 4.18 63.35 53.35 - 73.35 SPW-7420 water 12/22/2004 Sr-89 105.26 +/- 4.21 103.47 82.78 - 124.16 SPW-7420 water 12/22/2004 Sr-90 48.24 +/- 1.70 42.72 34.18 - 51.26 SPAP-7437 Air Filter 12/22/2004 Gr. Beta 1.65 +/- 0.02 1.45 0.00 - 11.45 SPF-7524 Fish 12/29/2004 Cs-134 1.11 +/- 0.03 1.27 0.76 - 1.78 SPF-7524 Fish 12/29/2004 Cs-137 1.21 +/- 0.05 1.19 0.71 -1.67 SPW-7526 water 12/29/2004 H-3 78615.70 +/- 773.70 80543.00 64434.40 -96651.60 SPW-7532 water 12/29/2004 Fe-55 30894.00 +/- 1484.00 32752.00 26201.60 - 39302.40 SPW-7540 water 12/29/2004 Tc-99 30.28 +/- 1.11 32.98 20.98 - 44.98 a Uquid sample results are reported in pCVUter, air filters (pCVm3), charcoal (pCVm3), and solid samples (pCig).

b Results are based on single determinations.

cControl limits are based on Attachment A, Page A2 of this report.

NOTE: For fish, Jello is used for the Spike matrix. For Vegetation, cabbage is used for the Spike matrix.

A3-2

- page 58 of 122 --

TABLE A-4. In-House 'Blank' Samples Concentration (pC!/L)a Lab Code Sample Date Analysis Laboratory results (4.66a) Acceptance Type LLD Activityb Criteria (4.66 a)

SPCH-712 Charcoal 02/20/2004 1-131(G) 2.24 9.6 SPW-722 Water 02/20/2004 Ni-63 2.64 -0.78 +/- 1.58 20 SPAP-734 Air Filter 02/25/2004 Gr. Beta 0.96 -1.02 +/- 0.42 3.2 SPW-736 Water 02/25/2004 Cs-1 34 2.47 10 SPW-736 Water 02/25/2004 Cs-137. 1.91 10 SPW-736 Water 02/25/2004 1-131 0.15 -0.031 +/- 0.10 0.5 SPW-736 Water 02/25/2004 1-131 (G) 3.24 20 SPMI-738 Milk 02/25/2004 Cs-1 34 2.54 10 SPMI-738 Milk 02/25/2004 Cs-1 37 5.34 10 SPMI-738 Milk 02/25/2004 1-131 0.16 -0.071 +/- 0.10 0.5 SPMI-738 Milk 02/25/2004 1-131 (G) 5.36 20 SPW-1110 Water 03/18/2004 Fe-55 772.70 168.4 +/- 480.90 1000 SPW-1497 Water 04/07/2004 H-3 152.30 81.4 +/- 79.40 200 SPW-1684 Water 04/16/2004 Cs-134 2.43 10 SPW-1684 Water 04/16/2004 Cs-1 37 2.53 10 SPW-1684 Water 04/16/2004 1-131 0.50 0.21 +/- 0.26 0.5 SPW-1684 Water 04/16/2004 1-131 (G) 4.49 20 SPW-1684 Water 04/16/2004 Sr-89 0.64 0.19 +/- 0.52 5 SPW-1684 Water 04/16/2004 Sr-90 0.64 0.13 +/- 0.31 1 SPMI-1686 Milk 04/16/2004 Cs-134 5.00 10 SPMI-1686 Milk 04/16/2004 Cs-i 37 4.16 10 SPMI-1686 Milk 04/16/2004 1-131 0.45 0.13 +/- 0.24 0.5 SPMI-1 686 Milk 04/16/2004 1-131 (G) 6.53 20 SPMI-1 686 Milk 04/16/2004 Sr-89 0.71 0.11 0.70 5 SPMI-1686 Milk 04/16/2004 Sr-90 0.71 0.66 +/- 0.40 1 SPVE-1863 Vegetation 04/26/2004 11 31(G) 3.55 20 SPCH-1887 Charcoal 04/26/2004 1-131 (G) 7.04 9.6 SPAP-1889 Air Filter 04/27/2004 Gr. Beta 0.74 -0.96 +/- 0.35 3.2 SPF-1918 Fish 04/29/2004 Cs-1 34 7.13 100 SPF-1918 Fish 04/29/2004 Cs-1 37 6.59 100 SPW-3152 Water 06/24/2004 Fe-55 790.30 -70.0 +/-L474.50 1000 SPW-4233 Water 08/04/2004 H-3 154.23 102.67 +/- 81.38 200 SPAP-4235 Air Filter 08/04/2004 Gr. Beta 0.96 -0.99 +/- 0.38 3.2 SPW-5711 Water 10/06/2004 Co-60 4.26 10 SPW-5711 Water 10/06/2004 Cs-1 34 6.02 10 SPW-5711 Water 10/06/2004 Cs-i 37 5.28 10 SPW-5711 Water 10/06/2004 Sr-90 0.61 -0.13 +/- 0.27 1 A4-1

-- page 59 of 122 --

TABLE A-4. In-House 'Blank' Samples Concentration (pCVL)a Lab Code Sample Date Analysis Laboratory results (4.66a) Acceptance Type LLD Activityb Criteria (4.66 c)

SPMI-5713 Milk 10/06/2004 Cs-134 4.60 10 SPMI-5713 Milk 10/06/2004 Cs-137 5.81 10 SPMI-5713 Milk 10/06/2004 1-131(G) 6.07 20 SPMI-5713 Milk 10/06/2004 Sr-90 0.68 1.4 :t0.45 1 SPMI-7419 Milk 12/22/2004 Cs-134 8.66 10 SPMI-7419 Milk 12/22/2004 Cs-137 5.61 10 SPMI-7419 Milk 12122/2004 Sr-90 0.82 1.67 +/-t 0.48 1 SPW-7421 Water 12122/2004 Sr-89 1.21 0.58 +/-t 0.94 5 SPW-7421 Water 12/22/2004 Sr-90 0.82 0.26 +/- 0.41 1 SPAP-7438 Air Filter 12/22/2004 Gr. Beta 0.93 -0.78 +/- 0.40 3.2 SPF-7525 Fish 12/29/2004 Cs-134 8.27 100 SPF-7525 Fish 12/29/2004 Cs-137 10.60 100 SPW-7526 Water 12/29/2004 H-3 164.80 -47.0 +/- 84.60 200 SPW-7533 Water 12/29/2004 Fe-55 753.00 118.6 +/- 465.80 1000 SPW-7535 Water 12/29/2004 Ni-63 13.10 4.3 :t 8.10 20 SPW-7540 Water 12/29/2004 Tc-99 1.19 -0.036 t 0.72 10 8 Uquid sample results are reported In pCi/Llter, air filters( pCi/filter), charcoal (pCl/charcoal canister), and solid samples (pCVg).

b Activity reported is a net activity result. For gamma spectroscopic analysis, activity detected below the LLD value Isnot reportec

' 1-131 (G); iodine-131 as analyzed by gamma spectroscopy.

d Low levels of Sr-90 are still detected Inthe environment. A concentration of (1-5 pCUL) In milk Is not unusual.

A4-2 *-page 60 of 122 --

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result E-30, 31 115/2004 Gr. Beta 1.27 +/- 0.06 1.26 +/- 0.05 1.27 +/- 0.04 E-30, 31 1/5/2004 K-40 1.33 +/- 0.21 1.11 +/-0.20 1.22 +/- 0.15 WW-58,59 1/5/2004 Gr. Beta 4.20 +/- 1.33 4.46 +/- 1.34 4.33 +/- 0.94 WW-58, 59 1/5/2004 K-40 2.30 +/- 0.23 2.70 +/- 0.27 2.50 +/- 0.18 TD-7889,7890 1/5/2004 H-3 16582.00 +/- 366.00 16060.00 +/- 360.00 16321.00 +/- 256.69 MI-79, 80 1/7/2004 K-40 1451.50 +/- 125.90 1383.60 +/- 115.50 1417.55 +/- 85.43 MI-79, 80 1/7/2004 Sr-90 0.90 +/- 0.31 1.05 +/- 0.34 0.97 +/- 0.23 S-100, 101 1/13/2004 Cs-137 8.50 +/- 0.23 8.52 +/- 0.21 8.51 +/- 0.16 SW-225, 226 1/13/2004 Gr. Alpha 2.62 +/- 1.26 2.05 +/- 1.16 2.34 +/- 0.86 SW-225, 226 1/13/2004 Gr. Beta 6.37 +/- 1.15 4.92 +/- 1.06 5.65 +/- 0.78 U-304, 305 1/16/2004 Gr. Beta 5.18 +/- 1.38 7.04 +/- 1.53 6.11 +/- 1.03 SW-345,346 1/27/2004 1-131 1.32 +/- 0.24 1.56 +/- 0.21 1.44 +/- 0.16 SWT-423, 424 1/27/2004 Gr. Beta 2.34 +/- 0.54 2.38 +/- 0.52 2.36 +/- 0.38 SWU-469, 470 1/27/2004 Gr. Beta 2.99 +/- 0.57 3.09 +/- 0.67 3.04 +/- 0.44 TD-545, 546 2/2/2004 H-3 658.40 +/- 104.60 712.30 +/- 106.60 685.35 +/- 74.67 MI-524. 525 2/4/2004 K-40 1240.00 +/- 147.90 1265.60 +/- 166.30 1252.80 +/- 111.28 MI-567, 568 2/9/2004 K-40 1322.90 +/- 105.50 1340.80 +/- 112.80 1331.85 +/- 77.22 MI-567, 568 2/9/2004 Sr-90 0.98 +/- 0.48 0.79 +/- 0.42 0.89 +/- 0.32 MI-588,589 2/11/2004 K-40 1185.70 +/- 157.80 1337.70 +/- 160.00 1261.70 +/- 112.36 SWU-778, 779 2/24/2004 Gr. Beta 2.55 +/- 0.54 2.53 +/- 0.56 2.54 +/- 0.39 LW-1014, 1015 3/1/2004 Gr. Beta '1.78 +/- 0.56 2.06 +/- 0.57 1.92 +/- 0.40 SW-966, 967 3/9/2004 Gr. Alpha 2.70 +/- 1.43 2.96 +/- 1.63 2.83 +/- 1.08 SW-966,967 3/9/2004 Gr. Beta 8.06 +/- 1.20 7.33 +/- 1.21 7.69 +/- 0.85 SW-966,967 3/9/2004 H-3 182.04 +/-86.24 198.87 +/- 86.97 190.45 +/- 61.24 SW-1249,1250 3/31/2004 Gr. Beta 4.71 +/- 1.11 5.25 +/- 1.10 4.98 +/- 0.78 LW-1464,1465 3/31/2004 Gr. Beta 2.13 +/- 0.52 2.39 +/- 0.53 2.26 +/- 0.37 AP-1633,1634 3/31/2004 Be-7 0.05 +/-0.02 0.05 +/- 0.02 0.05 +/- 0.01 AP-1714,1715 3/31/2004 Be-7 0.04 +/- 0.01 0.05 +/- 0.01 0.05 +/- 0.01 TD-1489,1490 4/1/2004 H-3 681.00 +/- 110.00 709.00 +/- 111.00 695.00 +/- 78.14 SWT-1299,1300 4/2/2004 Gr. Beta 3.13 +/- 0.57 3.64 +/- 0.60 3.39 +/- 0.41 DW-1420,1421 4/2/2004 Gr. Beta 1.29 +/- 0.83 1.62 +/- 0.87 1.46 +/- 0.60 DW-1510, 1511 4/2/2004 1-131 0.68 +/- 0.27 0.62 +/- 0.36 0.65 +/- 0.23 BS-1537,1538 4/6/2004 Gr. Beta 6.81 +/- 1.20 6.76 +/- 1.23 6.78 +/- 0.86 WW-1654,1655 4/13/2004 Gr. Beta 6.83 +/- 1.17 5.60 +/- 1.12 6.21 +/- 0.81 LW-1680,1681 4/13/2004 Gr. Beta 2.45 +/- 0.64 2.93 +/- 0.62 2.69 +/- 0.45 MI-1735,1736 4/14/2004 K-40 1384.90 +/- 182.00 1408.20 +/- 187.90 1396.55 +/- 130.80 MI-1802,1803 4/19/2004 K-40 1327.50 +/- 109.10 1206.30 +/- 113.30 1266.90 +/- 78.64 MI-1802,1803 4/19/2004 Sr-90 0.72 +/- 0.40 0.77 +/- 0.41 0.74 +/- 0.28 -

U-1781,1782 4/21/2004 Gr. Alpha 0.20 +/- 1.90 -0.30 +/- 2.40 -0.05 +/- 1.53 SWT-1933,1934 4/27/2004 Gr. Beta 2.60 +/- 0.55 2.33 +/- 0.52 2.46 +/- 0.38 F-1912.1913 4/29/2004 H-3 8875.00 +/- 250.00 9119.00 +/- 253.00 8997.00 +/- 177.84 F-1912, 1913 4/29/2004 K-40 3406.90 +/- 533.30 3550.60 +/- 581.40 3478.75 +/- 394.47 LW-1960,1961 4/29/2004 Gr. Beta 2.23 +/- 0.55 2.38 +/- 0.57 2.31 +/- 0.40

-- page 61 of 122 --

A5-1

TABLE A-5. In-House "Duplicate" Samples Concentration (pCiIL)a Averaged Lab Code Date. Analysis First Result Second Result Result BS-2083, 2084 5/3/2004 Be-7

• 1.10 0.44 1.17 +/- 0.20 1.14 +/- 0.24 BS-2083, 2084 5/3/2004 Gr. Beta 28.44 i 2.27 25.56 +/- 2.04 27.00 +/- 1.53 BS-2083. 2084 5/3/2004 K-40 6.75 + 0.89 6.35 +/- 0.53 6.55 +/- 0.52 BS-2083. 2084 5/3/2004 Sr-90 0.12 i 0.04 0.17 +/- 0.05 0.15 +/- 0.03 MI-2225, 2226 5/11/2004 K-40 1396.30 i 124.20 1227.60 +/- 125.40 1311.95 +/- 88.25 SW-2267, 2268 5/11/2004 Gr. Alpha 2.95 +/- 1.44 2.41 +/- 1.37 2.68 +/- 0.99 SW-2267, 2268 5/11/2004 Gr. Beta 6.80 i 1.18 7.25 +/- 1.21 7.03 +/- 0.84 MI-2437. 2438 5/17/2004 K-40 1549.00 i 123.40 1566.20 +/- 118.60 1557.60 +/- 85.58 MI-2437, 2438 5/17/2004 Sr-90 1.83 i 0.44 1.99 +/- 0.42 1.91 +/- 0.30 F-2413. 2414 5/20/2004 K-40 2844.60 i 550.40 2963.00 +/- 532.30 2903.80 +/- 382.85 SO-2578, 2579 5/26/2004 Cs-137 0.16 +/- 0.02 0.21 +/- 0.05 0.18 +/- 0.03 S0-2578, 2579 5/26/2004 Gr. Beta 28.07 i 3.24 28.73 +/- 3.00 28.40 +/- 2.21 SO-2578, 2579 5/26/2004 K-40 19.41 i0.78 18.93 +/- 1.04 19.17 +/- 0.65 SS-2603, 2604 5/26/2004 Cs-1 37 0.06 +/- 0.02 0.06 +/- 0.02 0.06 i 0.02 SS-2603. 2604 5/26/2004 K-40 10.18 i 0.63 10.43 +/- 0.56 10.30 i 0.42 G-2677, 2678 6/1/2004 Be-7 1.31 i 0.25 1.25 +/- 0.23 1.28 00.17 G-2677, 2678 6/1/2004 Gr. Beta 5.73 i 0.12 5.86 +/- 0.12 5.79 i 0.09 G-2677. 2678 6/1/2004 K-40 5.56 i 0.49 5.78 +/- 0.50 5.67 i 0.35 G-2677, 2678 6/1/2004 Sr-90 0.01 +/- 0.00 0.01 +/- 0.01 0.01 _ 0.00 DW-2700. 2701 6/1/2004 Gr. Beta 1.82 +/- 1.01 2.66 +/- 0.94 2.24 +/- 0.69 TD-2876, 2877 6/1/2004 H-3 13116.00 +/- 324.00 12746.00 +/- 320.00 12931.00 _ 227.69 MI-2724, 2725 6/3/2004 K-40 1509.00 +/- 116.10 1489.20 +/- 126.10 1499.10 i85.70 MI-2724, 2725 6/3/2004 Sr-90 1.64 +/- 0.46 1.81 +/- 0.44 1.73 i 0.32 BS-2921, '2922 6/3/2004 K-40 8.32 +/- 0.63 8.55 +/- 0.62 8.44 +/- 0.44 TD-2876. 2877 6/4/2004 H-3 13116.00 +/- 324.00 12746.00 +/- 320.00 12931.00 _ 227.69 BS-2897, 2898 6/4/2004 Gr. Beta 9.31 +/- 1.43 8.82 +/- 1.39 9.06 i 1.00 SWU-3092, 3093 6/9/2004 Gr. Beta 1.95 i 0.71 2.55 +/- 0.76 2.25 i 0.52 CF-2986, 2987 6/14/2004 Be-7 0.69 +/- 0.12 0.84 +/- 0.19 0.76 +/- 0.11 CF-2986, 2987 6/14/2004 K-40 4.50 i 0.32 3.82 +/- 0.48 4.16 +/- 0.29 MI-2977, 2978 6/15/2004 K-40 1486.70 i 120.10 1291.60 +/- 167.40 1389.15 +/-103.01 MI-3007. 3008 6/15/2004 K-40 1333.90 i 121.30 1355.80 +/- 176.50 1344.85 +/- 107.08 W-3031, 3032 6/18/2004 H-3 642.00 i 108.00 562.00 +/- 105.00 602.00 +/- 75.31 W-3071, 3072 6/21/2004 H-3 273.00 i 94.00 203.00 +/- 92.00 238.00 +/- 65.76 SW-3145, 3146 6/22/2004 1-131 0.97 i 0.20 1.43 +/- 0.20 1.20 +/- 0.14 DW-3278, 3279C 6/25/2004 1-131 0.67 i 0.26 0.48 +/- 0.25 0.57 +/- 0.18 AP-3922. 3923 6/28/2004 Be-7 0.08 i 0.01 0.07 +/- 0.01 0.07 +/- 0.01 AP-3637, 3638 6/29/2004 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 LW-3589, 3590 6/30/2004 Gr. Alpha 0.28 +/- 0.55 1.29 +/- 0.89 0.79 +/- 0.53 LW-3589, 3590 6/30/2004 Gr. Beta 1.91 +/-0.64 2.86 +/- 0.70 2.39 +/- 0.48 LW-3589, 3590 6/30/2004 H-3 8369.20 +/- 262.57 8226.01 +/- 260.51 8297.61 +/- 184.94 AP-3943, 3944 6/30/2004 Be-7 0.08 +/- 0.02 0.09 +/- 0.02 0.08 +/- 0.01

-- page 62 of 122 --

A5-2

TABLE A-5. In-House "Duplicate" Samples Concentration (pC!IL)a Averaged Lab Code Date Analysis First Result . Second Result Result E-3377. 3378 7/1/2004 Gr. Beta 1.21 + 0.06 1.35 +/- 0.07 1.28 +/- 0.05 E-3377, 3378 7/1/2004 K-40 1.08 +/- 0.20 1.30 +/- 0.22 1.19 +/- 0.15 G-3377, 3378 7/1/2004 Be-7 1.10 +/- 0.13 1.16 +/- 0.16 1.13 +/- 0.10 G-3377, 3378 7/1/2004 Gr. Beta 6.42 +/- 0.19 6.28 +/- 0.19 6.35 +/- 0.13 G-3377, 3378 7/1/2004 K-40 5.26 +/- 0.31 5.36 +/- 0.28 5.31 +/- 0.21 VE-3681. 3682 7/13/2004 K-40 2.65 +/- 0.45 2.90 +/- 0.61 2.77 +/- 0.38 CF-3707, 3708 7/13/2004 Be-7 1.97 +/- 0.44 2.11 +/- 0.25 2.04 +/- 0.25 CF-3707. 3708 7/13/2004 K-40 5.39 +/- 0.44 4.98 +/- 0.42 5.19 +/- 0.30 SW-3773, .3774 7/14/2004 H-3 10697.20 +/- 295.70 10689.60 +/- 295.70 10693.40 +/- 209.09 LW-3849, 3850 7/14/2004 Gr. Beta 2.21 +/- 0.54 2.32 +/- 0.65 2.27 +/- 0.42 SWU-4307, 4308 7/14/2004 Gr. Beta 3.49 +/- 0.57 3.68 +/- 0.61 3.59 +/- 0.42 MI-4051, 4052 7/28/2004 K-40 1190.70 +/-204.60 1357.00 +/- 145.90 1273.85 +/- 125.65 VE-4079, 4080 7/28/2004 K-40 4.90 +/- 0.51 4.62 +/- 0.61 4.76 +/- 0.40 MI-4163, 4164 7/28/2004 K-40 1422.40 +/- 186.50 1330.80 +/- 181.00 1376.60 +/- 129.95 MI-4163, 4164 7/28/2004 Sr-90 0.87 +/- 0.32 1.00 +/- 0.35 0.93 +/- 0.24 WW-4387, 4388 8/3/2004 Gr. Beta 5.94 +/- 0.76 6.28 +/- 0.76 6.11 +/- 0.54 MI-4286, 4287 8/4/2004 K-40 1435.20 +/- 76.90 1404.70 +/- 80.54 1419.95 +/- 55.68 MI-4286. 4287 8/4/2004 Sr-90 1.88 +/- 0.40 1.31 +/- 0.35 1.59 +/- 0.26 VE-4370, 4371 8/4/2004 - H-3 0.54 +/- 0.08 0.62 +/- 0.08 0.58 +/- 0.06 VE-4408, 4409 8/5/2004 K-40 2.03 +/- 0.39 2.12 +/- 0.32 2.08 +/- 0.25 VE-4467, 4468 8/9/2004 K-40 6.28 +/- 0.76 6.11 +/- 0.75 6.20 +/- 0.53 MI-4492, 4493 8/10/2004 K-40 1478.70 +/- 116.70 1472.50 +/- 105.10 1475.60 +/- 78.53 MI-4492, 4493 8/10/2004 Sr-90 1.35 +/- 0.40 1.08 +/- 0.42 1.22 +/- 0.29 MI-4518, 4519 8/11/2004 K-40 1197.30 +/- 158.50 1350.20 +/- 202.30 1273.75 +/- 128.50 VE-4748, 4749 8/25/2004 Gr. Beta 2.31 +/- 0.05 2.32 +/- 0.05 2.31 +/- 0.04 VE-4748, 4749 8/25/2004 K-40 1.70 +/- 0.25 1.94 +/- 0.31 1.82 +/- 0.20 LW-4769, 4770 8/26/2004 Gr. Beta 2.00 +/- 0.58 2.07 +/- 0.58 2.04 +/- 0.41 ME-4905, 4906 9/1/2004 Gr. Beta 3.06 +/- 0.10 2.93 i 0.10 3.00 +/- 0.07 ME-4905, 4906 9/1/2004 K-40 2.33 +/- 0.67 3.26 +/- 0.58 2.80 i 0.44.

MI-4926, 4927 9/1/2004 K-40 1316.20 +/- 115.40 1285.80 +/- 117.30 1301.00 +/- 82.27 MI-4926, 4927 9/1/2004 Sr-90 3.62 +/- 0.52 2.07 +/- 0.43 2.84 +/- 0.34 VE-5027, 5028 9/2/2004 Gr. Beta 2.43 +/- 0.07 2.39 i 0.06 2.41 +/- 0.05 VE-5027, 5028 9/2/2004 K-40 1.77 +/- 0.20 1.94 +/-0.31 1.86 i 0.18 SW-5003, 5004 9/7/2004 1-131 1.69 +/- 0.23 1.50 i 0.25 1.59 0.17 0

MI-5050, 5051 9/7/2004 K-40 1559.40 +/- 131.80 1560.70 +/- 121.20 1560.05 i 89.53 MI-5050, 5051 9/7/2004 Sr-90 2.26 +/- 0.52 1.61 i0.47 1.94 +/- 0.35 WW-5072, 5073 9/7/2004 Gr. Beta 4.31 +/- 0.70 4.11 i0.69 4.21 +/- 0.49 SW-5216, 5217 9/14/2004 Gr. Alpha 4.34 +/- 1.71 4.30 +/- 1.77 4.32 +/- 1.23 SW-5216, 5217 9/14/2004 Gr. Beta 7.97 +/- 1.24 8.58 +/- 1.29 8.27 +/- 0.89

-- page 63 of 122 --

A5-3

TABLE A-5. In-House "Duplicate" Samples Concentration (pCVL)a Averaged Lab Code Date Analysis . First Result Second Result . Result G-5237. 5238 9/15/2004 Be-7 1.18 +/- 0.23 1.28 +/- 0.24 1.23 +/-0.17 G-5237. 5238 9/15/2004 K-40 7.16 +/- 0.58 7.56 +/- 0.55 7.36 +/- 0.40 LW-5316. 5317 9/16/2004 Gr. Beta 2.76 +/- 0.58 2.64 +/- 0.54 2.70 +/- 0.40 SS-5450, 5451 9124/2004 K-40 10.33 +/- 0.66 10.10 +/- 0.74 10.22 +/- 0.50 AP-6308. 6309 9/27/2004 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 SWU-5495, 5496 9/2812004 Gr. Beta 3.38 +/- 1.78 4.41 +/- 1.94 3.90 +/- 1.32 AP-6070. 6071 9128/2004 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 G-5516, 5517 9/2912004 Be-7 1.81 +/- 0.29 1.74 +/- 0.30 1.77 +/- 0.21 G-5516, 5517 9/2912004 K-40 7.35 +/- 0.70 7.43 +/- 0.62 7.39 +/- 0.47 AP-6258. 6259 9129/2004 Be-7 0.07 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 F-7211, 7212 9/29/2004 Cs-I 37 0.04 +/- 0.01 0.05 +/- 0.02 0.05 +/- 0.01 F-7211, 7212 9/2912004 K-40 2.76 +/- 0.27 3.07 +/- 0.26 2.92 +/- 0.19 BS-5902, 5903 10/1/2004 Co-60 0.25 +/- 0.05 0.26 +/- 0.03 0.25 +/- 0.03 BS-5902, 5903 10/1/2004 Co-60 2.53 +/- 0.11 2.52 +/- 0.06 2.52 +/- 0.06 E-5654, 5655 10/4/2004 Gr. Beta 1.40 +/- 0.06 1.32 +/- 0.06 1.36 +/- 0.04 E-5654, 5655 10/412004 K-40 1.32 +/- 0.26 1.22 +/- 0.24 1.27 +/- 0.18 Ml-5676. 5677 1014/2004 K-40 1311.00 +/- 122.00 .1398.00 +/- 125.00 1354.50 +/- 87.33 SO-5756, 5757 10/4/2004 Gr. Alpha 7.12 +/- 3.09 6.69 +/- 2.92 6.91 +/- 2.13 SO-5756, 5757 101412004 Gr. Beta 19.66 +/- 2.63 22.32 +/- 2.65 20.99 +/- 1.87 SO-5756, 5757 10/4/2004 K-40 16.45 +/- 0.86 17.52 +/- 0.78 16.99 + 0.58 VE-6483, 6484 1016/2004 K-40 9.35 +/- 0.55 9.88 +/- 0.23 9.61 +/- 0.30 Ml-5923, 5924 10/1212004 K-40 1333.60 +/- 183.50 1552.40 +/- 179.20 1443.00 +/- 128.24 SS-6046, 6047 10/13/2004 Cs-137 0.02 +/- 0.01 0.02 +/- 0.01 0.02 +/-0.01 SS-6046, 6047 10/13/2004 Gr. Beta 7.93 +/- 1.72 9.57 +/- 1.88 8.75 +/- 1.27 SS-6046, 6047 10/13/2004 K-40 5.77 +/- 0.42 5.77 +/- 0.40 5.77 +/- 0.29 DW-6208, 6209 10/15/2004 1-131 0.89 +/- 0.26 0.65 +/- 0.27 0.77 +/- 0.19 BS-6694, 6695 10119/2004 K-40 11.84 +/- 0.67 12.75 +/- 0.79 12.29 +/- 0.52 VE-6354, 6355 10/2512004 Gr. Beta 4.82 +/- 0.14 4.76 +/- 0.14 4.79 +/- 0.10 VE-6354, 6355 10/25/2004 K-40 4.71 +/- 0.54 4.82 +/- 0.61 4.77 +/- 0.41 DW-6462, 6463 10/27/2004 Gr. Beta 8.46 +/- 1.27 8.22 +/- 1.24 8.34 +/- 0.89 LW-6377. 6378 10/28/2004 Gr. Beta 2.18 +/- 0.54 2.33 +/- 0.53 2.25 +/- 0.38 SS-6504. 6505 10/29/2004 K-40 9.28 +/- 0.61 8.51 +/- 0.78 8.89 +/- 0.50 LW-6762, 6763 10/31/2004 Gr. Beta 1.85 +/- 0.66 1.69 +/- 0.64 1.77 +/- 0.46 BS-6576. 6577 11/1/2004 Gr. Beta .11.02 +/- 1.54 13.77 +/- 1.77 .12.40 +/- 1.17 BS-6576, 6577 11/1/2004 K-40 9.43 +/- 0.71 8.84 i 0.68 9.14 +/- 0.49 SO-6715, 6716 11/212004 Cs-137 0.29 +/- 0.04 0.33 +/- 0.06 0.31 +/- 0.04 S0-6715. 6716 11/2/2004 Gr. Alpha 10.94 +/- 3.95 14.72 +/- 4.16 12.83 +/- 2.87 SO-6715, 6716 11/212004 Gr. Beta 21.33 +/- 3.10 24.82 +/- 3.10 23.07 +/- 2.19 SO-6715, 6716 11/212004 K-40 10.42 +/- 0.71 12.16 i 1.06 11.29 +/- 0.64 VE-6673, 6674 11/8/2004 Gr. Alpha 0.07 +/- 0.04 0.14 +/- 0.05 0.11 +/- 0.03 VE-6673, 6674 11/8/2004 Gr. Beta 4.50 +/- 0.12 4.48 +/- 0.12 4.49 +/- 0.09 VE-6673, 6674 11/8/2004 K-40 4.05 +/- 0.49 4.65 +/- 0.55 4.35 +/- 0.37 A5-4 -- page 64 of 122 -

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result SO-6820, 6821 11/1012004 K-40 14.41 i 1.03 15.01 +/- 1.09 14.71 +0.75 SO-6820, 6821 11/10/2004 Sr-90 0.04 +/-0.02 0.07 +/- 0.02 0.06 +/- 0.02 SWU-7160, 7161 11/30/2004 Gr. Beta 4.39 +/- 1.98 3.09 +/- 1.77 3.74 i 1.33 Ml-7062. 7063 12/1/2004 K-40 1456.00 +/- 124.80 1640.50 +/- 131.40 1548.25 +/- 90.61 MI-7062, 7063 12/1/2004 Sr-90 1.13 +/- 0.41 0.98 +/- 0.43 1.06 +/- 0.30 S-7281, 7282 12/5/2004 Cs-137 0.82 +/- 0.15 1.16 +/- 0.20 0.99 +/- 0.12 VE-7343, 7344 12/13/2004 Gr. Beta 5.25 +/- 0.14 5.08 +/- 0.14 5.16 +/- 0.10 VE-7343,7344 12/13/2004 K-40 4.23 +/- 0.71 4.33 +/-0.69 4.28 +/- 0.49 MI-7317. 7318 12/14/2004 K-40 1702.80 +/- 129.70 1536.80 +/- 115.10 1619.80 +/- 86.70 WW-7375, 7376 12/14/2004 Gr. Beta 14.13 +/- 1.03 15.22 +/- 1.06 14.68 +/- 0.74 SWU-7507, 7508 12/14/2004 Gr. Beta 4.48 +/- 0.66 5.31 +/- 0.69 4.89 +/- 0.48 DW-7563,7564 12/27/2004 Gr. Beta 1.88 +/- 0.51 2.34 +/- 0.52 2.11 +/- 0.37 P-7698. 7699 12/27/2004 H-3 246.01 +/- 95.00 259.06 +/- 95.51 252.53 +/- 67.35 AP-7741, 7742 12/28/2004 Be-7 0.06 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 Note: Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

a Results are reported in units of pCiUL, except for air filters (pCi/Filter), food products, vegetation, soil, sediment (pCi/g).

b 600 minute count time or longer, resulting in lower error.

A5-5 .- page 65 of 122 --

TABLE A-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)O.

Concentrationb Known Control Lab Code Type Date Analysis - Laboratory result Activity Limitsc STSO-1022 soil 05/01/04 Am-241 65.90 i 4.50 66.97 +/- 6.70 46.88 - 87.06 STSO-1 022 soil 05/01/04 Co-57 388.90 i 4.00 399.60 +/- 40.00 279.72 - 519.48 STSO-1 022 soil 05/01/04 Co-60 524.80 i7.10 518.00 +/- 51.80 362.60 - 673.40 STSO-1 022 soil 05/01/04 Cs-1 34 403.40 i 4.60 414.40 +/-41.40 290.08 - 538.72 STSO-1022 soil 05/01/04 Cs-I 37 829.10 i 7.60 836.20 +/- 83.62 585.34 - 1088.00 STSO-1022 soil 05/01/04 K-40 620.60 i 29.50 604.00 +/- 60.40 422.80 - 785.20 STSO-1022 soil 05/01104 Ni-63 254.80 +/- 8.40 357.05 +/- 35.70 249.94 -464.17 STSO-1022 d.e soil 05/01/04 Tc-99 59.00 +/- 6.00 117.66 +/- 11.78 82.36 - 152.96 STSO-1022 d.I soil 05/01/04 U-23314 24.70 +/- 3.60 37.00 +/- 3.70 25.90 - 48.40 STSO-1022 d. soil 05/01/04 U-238 24.20 +/- 3.50 38.85 +/- 3.90 27.20 - 50.51 STSO-1022 soil 05/01/04 Zn-65 743.00 +/- 13.10 699.30 +/- 69.90 489.51 - 909.09 STAP-1 023 Air Filter 05/01/04 Gr. Alpha 0.06 +/- 0.02 0.40 +/- 0.04 0.00 - 0.80 STAP-1 023 Air Filter 05/01/04 Gr. Beta 1.37 +/- 0.08 1.20 +/- 0.12 0.60 - 1.80 STAP-1 024 Air Filter 05/01/04 Am-241 0.08 +/- 0.03 0.10 +/- 0.01 0.07 - 0.13 STAP-1024 Air Filter 05/01/04 Co-57 2.07 +/- 0.06 2.40 +/- 0.24 1.68 - 3.12 STAP-1024 Air Filter 05/01/04 Co-60 2.11 +/- 0.08 2.30 +/- 0.23 1.61 - 2.99 STAP-1024 9 Air Filter 05/01/04 Cs-1 34 1.78 +/- 0.08 2.90 +/- 0.29 2.03 - 3.77 STAP-1 024 Air Filter 05/01/04 Cs-1 37 1.76 +/- 0.08 2.00 +/- 0.20 1.40 - 2.60 STAP-1 024 Air Filter 05/01/04 Mn-54 2.84 +/- 0.11 3.00 +/- 0.30 2.10 - 3.90 STAP-1 024 Air Filter 05/01/04 Pu-238 0.12 +/- 0.01 0.13 +/- 0.01 0.09 - 0.17 STAP-1 024 Air Filter 05/01/04 Pu-239/40 0.08 +/- 0.01 0.09 +/- 0.01 0.06 - 0.12 STAP-1 024 Air Filter 05/01/04 Sr-90 0.66 +/- 0.19 0.80 +/- 0.08 0.56 -1.04 STAP-1024 Air Filter 05/01/04 U-23314 0.23 +/- 0.03 0.21 +/- 0.02 0.15 - 0.27 STAP-1024 Air Filter 05/01/04 U-238 0.23 +/- 0.03 0.22 +/- 0.02 0.15 - 0.29 STAP-1024 Air Filter 05/01/04 Zn-65 3.90 +/- 0.22 4.00 +/- 0.40 2.80 - 5.20 STW-1026 water 05/01/04 Am-241 0.56 +/- 0.07 0.60 +/- 0.06 0.42 - 0.78 STW-1026 water 05/01/04 Co-57 184.10 +/- 13.50 185.00 +/- 18.50 129.50 - 240.50 STW-1026 water 05/01/04 Co-60 164.40 +/- 11.70 163.00 +/- 16.30 114.10 - 211.90 STW-1026 water 05/01/04 Cs-1 34 201.10 +/- 14.00 208.00 +/- 20.80 145.60 - 270.40 STW-1026 water 05/01/04 Cs-137 245.50 +/- 15.80 250.00 +/- 25.00 175.00 - 325.00 STW-1026 water 05/01/04 Fe-55 37.60 +/- 25.30 33.00 +/- 3.30 23.10 - 42.90 STW-1026 water 05/01/04 H-3 76.50 +/- 5.40 83.00 +/- 8.30 58.10 - 107.90 STW-1026 water 05/01/04 Mn-54 272.10 +/- 17.50 267.00 +/- 26.70 186.90 - 347.10 STW-1026 water 05/01/04 Ni-63 94.40 +/- 3.20 100.00 +/- 10.00 70.00 - 130.00 STW-1026 water 05/01/04 Pu-238 1.11 +/- 0.09 1.20 +/- 0.12 0.84 - 1.56 STW-1026 water 05/01/04 Pu-239/40 0.01 +/- 0.01 0.00 +/- 0.00 0.00 - 0.10 STW-1026 water 05/01/04 Sr-90 6.20 +/- 1.10 7.00 +/- 0.70 4.90 - 9.10 STW-1026 water 05/01/04 Tc-99 10.70 +/- 1.00 10.00 +/- 1.00 7.00 - 13.00 A6-1 -- page 66 of 122 --

--

TABLE A-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)'.

Concentrationb Known Control Lab Code Type Date Analysis Laboratory result Activity Limitsc STW-1026 water 05/01104 U-233/4 0.14 +/- 0.02 0.12 +/- 0.01 0.08 -0.16 STW-1026 water 05/01/04 U-238 0.94 +/- 0.05 0.90 +/- 0.09 0.63 - 1.17 STW-1026 water 05/01/04 Zn-65 219.60 +/- 27.90 208.00 +/-20.80 145.60 -270.40 STW-1027. water 05/01/04 Gr. Alpha 1.20 +/- 0.10 1.20 +/- 0.12 0.00 - 2.40 STW-1027 water 05/01/04 Gr. Beta 4.30 +/- 0.10 4.10 i 0.41 2.05 - 6.15 Results obtained by Environmental. Inc. Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho bAll results are in Bqlkg or BqIL as requested by the Department of Energy.

c MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP.

d The cause of the deviation seems to be incomplete dissolution of the sample.

A spiked soil sample was prepared. Known activity; 32.98 pCi/g; laboratory result 33.47 pCi/g.

f The sample was reanalyzed with the same results. Investigation is in progress.

s Based on the results of gamma emitting isotopes (Cs-1 37 and Co-60), the filter geometry appears to be biased by -10%. Addition of the summation peak at 1400 KeV results in a recalculation of 2.12 i 0.15 Bqlsample.

A6-2

- page 67 of 122 --

TABLE A-7. Environmental Measurements Laboratory Quality Assessment Program (EML)

Concentration" EML Control Lab Code Type Date Analysis Laboratory results Resultb Limits' STW-1009 water 03/01/04 Am-241 .1.21 +/-0.02 1.31 0.66 - 1.56 STW-1009 water 03/01/04 Co-60 152.30 +/- 0.30 163.20 0.87 - 1.17 STW-1009 water 03/01/04 Cs-137 50.40 +/- 0.90 51.95 0.90 - 1.25 STW-1009 water 03/01/04 H-3 263.50 +/- 10.00 186.60 0.69 - 1.91 STW-1009 water 03/01/04 Pu-238 1.03 +/- 0.04 1.10 0.68 - 1.33 STW-1009 water 03/01/04 Pu-239/40 2.90 +/- 0.10 3.08 0.62 - 1.38 STW-1009 water 03/01/04 Sr-90 5.20 +/- 0.30 4.76 0.73 - 1.65 STW-1009 water 03/01/04 Uranium 4.35 +/- 0.21 4.62 0.40 - 1.45 STW-1010 water 03/01/04 Gr. Alpha 208.00 +/- 20.70 326.00 0.55 - 1.31 STW-1010 water 03/01/04 Gr. Beta 1063.00 +/- 27.00 1170.00 0.75 - 1.65 STSO-1011 Soil 03/01/04 Am-241 14.10 +/- 4.30 13.00 0.52 - 2.41 STSO-1011 Soil 03/01/04 Cs-1 37 1292.00 +/- 13.00 1323.00 0.74 -1.40 STSO-1011 Soil 03/01/04 K-40 563.00 +/- 83.00 539.00 0.70 - 1.59 STSO-1011 Soil 03/01/04 Pu-239/40 20.70 +/- 1.10 22.82 0.62 - 1.99 STSO-1011 Soil 03/01/04 Sr-90 72.10 +/- 5.80 51.00 0.58 - 2.96 STSO-1011 Soil 03/01/04 Uranium .139.10 +/- 10.20 180.22 0.27 - 1.48 STVE-1012 Vegetation 03/01/04 Am-241 4.50 +/- 0.20 4.93 *0.58 - 2.86 STVE-1012 Vegetation 03/01/04 Co-60 14.10 +/- 0.40 14.47 0.64 - 1.49 STVE-1012 Vegetation 03/01/04 Cs-137 573.90 +/- 6.00 584.67 0.75 -1.48 STVE-1012 Vegetation 03/01/04 K-40 709.00 +/- 19.30 720.00 0.45 - 1.51 STVE-1012 Vegetation 03/01/04 Pu-239/40 6.60 +/- 0.50 6.81 0.60 - 1.98 STVE-1012 Vegetation 03/01/04 Sr-90 766.50 +/- 51.30 734.00 0.50 - 1.37 STAP-1013 Air Filter 03/01/04 Am-241 0.11 +/- 0.01 0.10 0.62 - 1.93 STAP-1013 Air Filter 03/01/04 Co-60 30.90 +/- 1.08 35.40 0.74 - 1.25 STAP-1013 d Air Filter 03/01/04 Cs-1 34 12.30 +/- 1.30 18.20 0.70 - 1.21 STAP-1013 Air Filter 03/01/04 Cs-1 37 24.90 +/- 0.60 26.40 0.72 - 1.32 STAP-1013 Air Filter 03/01/04 Pu-238 0.04 +/- 0.01 0.04 0.61 - 1.55 STAP-1 013 Air Filter 03/01/04 Pu-239/40 0.17 +/- 0.02 0.16 0.67 - 1.58 STAP-1013 Air Filter 03/01/04 Sr-90 1.80 +/- 0.20 1.76 0.62 - 2.26 STAP-1 013 Air Filter 03/01/04 Uranium 0.17 +/- 0.01 0.17 0.79 - 2.88 STAP-1014 Air Filter 03/01/04 Gr. Alpha 1.09 +/- 0.06 1.20 0.82 - 1.58 STAP-1014 Air Filter 03/01/04 Gr. Beta 2.68 +/- 0.05 2.85 0.75 - 1.94

' Results are reported in BqlL with the following exceptions: Air Filters (Sq/Filter), Soil and Vegetation (Sq/kg).

bThe EML result listed is the mean of replicate determinations for each nuclide +/-the standard error of the mean.

cControl limits are reported by EML as the ratio of Reported Value / EML value.

d Probable effect of summation peaks and slight difference in filter geometry.

- page 68 of 122 --

A7-1

APPENDIX B REMP ANNUAL

SUMMARY

-- page 69 of 122 --

TABLE B-1 SAMPLING AND ANALYSIS FREQUENCY

SUMMARY

Number Number Number Sample of Collection of Type of Analysis of Type Sampling Frequency Samples Analysis Frequency Samples Locations Collected l Analyzed*

Gross Weekly 520 Air Beta Particulate 10 Weekly 520 Gamma Quarterly 40 Isotopic Composite Air Iodine 10 Weekly 520 Iodine' Weekly 520

[ Radiation 54 (cQonuatey) 214 Exapomsmurae Quarterly 214 Surface Gamma Monthly 12 Water 1 Monthly 12 Isotopic (Grab) Tritium Quarterly 4 Composite Gamma Monthly 12 Surface Isotopic Water IMnhy1 (Effluent 1 Monthly 12 Tritium Quarterly 4 Composite) Composite Iodine131 Monthly 12

• Number of samples analyzed does not include duplicate analysis, recounts, or reanalysis.

-- page 70 of 122 -

TABLE B-1 (continued)

Number l Number [ Number Sample of Collection of Type of Analysis of Type Sampling Frequency Samples Analysis Frequency Samples Locations l Collected ll Analyzed*

Surface Gamma Monthly 24 (Upstream 2 Monthly 24 Isotopic Composite) Tritium Quarterly 8 Composite Gamma Quarterly 12 Well Water 2** Quarterly 12 Isotopic Tritium Quarterly 12 Gross Beta Monthly 12 Drinking 1 Monthly 12 Gamma Monthly 12 Water yIsotopic Tritium Quarterly 4

____ __ _Composite l _l

• Number of samples analyzed does not include duplicate analysis, recounts, or reanalysis.

• • Samples collected at CL-12 are taken prior to water treatment and after water treatment.

- page 71 of 122 --

TABLE B-1 (continued)

Number Number _ Number Sample of Collection of Type of Analysis of Type Sampling Frequency Samples Analysis Frequency Samples Locations Collected Analyzed*

Shoreline Semi- 2 Gamma Semi- 2 Sediment . Annually _ Isotopic Annually l lGrass Monthly I enthly__J Mo4l 52 j Gamma (including Semi-Monthly I_ 104 Gross Monthly 46 Monthly Beta Vegetables 4 (during the 46 Gamma Monthly 92 graowng Isotopic season) (including Fis 2 Semi- 16 Gamma j Semi- 1 Fish Annually 16 Isotopi cl Annually 16 Gamma Monthly / 19 Monthly / Isotopic Semi-Monthly Milk 1 Semi- 19 Iodine1 31 Monthly / 19 Monthly"* Semi-Monthly

• Number of samples analyzed does not include duplicate analysis, recounts, or reanalysis.

• • Samples are collected Monthly from November through April (as delineated within the Station ODCM) and Semi-Monthly during May through October.

- page 72 of 122 --

TABLE B-2 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility: Clinton Power Station Docket No. 50-461 Location of Facility: DeWitt, Illinois Reporting Period: 01 January - 31 December 2004 (county, state)

Medium or Type of All Location Control Pathway Analysis Indicator with Highest Locations:

Sampled . Locations: Annual Total Lower Mean Mean (f) Number of (Unit of Number Limit of Mean (f) Non-routine Measurement) Performed Detection (Range) Name (Range) Reported (LLD) Distance - Measurements Direction Mean (f) -

(Range) 21.2 CL-47 21.2 Direct Gamma 1 3 3 miles (16/1 6)

Radiation dose - (8/9) .SW 0

---

-------- (18.8 - (19.6 -

(mRem/qtr) 214 22.6) 221.6 (2/2) 22.5)

_ _ _ _ _ __ __ __ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ (2 1 .9 - 2 3 .2 ) _ _ _ _ _ _ _ _ _ _ _ _ _

Gross 0.025 CL-1 0.027 0 Beta 0.01 (468/468) 1.8 miles W (52/52)

(.018 -

Air 520 .037) .027 (52/52) (0.020 -

s-------------- (.020 - .038) 0.036)

Particulates Gamma (pCi/in') Spec 40 Cs134 0.05 <0.001 . LLD 0 cs137 0.06 <0.001 . LLD 0 Air Iodine 131 1 1 0.07 <MDA LLD 0 (pCi/m 3) 520 Note: Column explanations are at the end of Table B-2.

-- page 73 of 122 --

TABLE B-2 (continued)

Medium or Type of Lower All Location Control Number of Pathway Analysis Limit of Indicator with Highest Locations: Non-routine Sampled - -Detection Locations: Annual Reported Total (LLD) Mean Mean (f) - Measurements (Unit of Number Mean (f)

Measurement) Performed (Range) Name (Range)

Distance -

Direction Mean (f) -

_ _(Range) l__ l Tritium 3,000 <158 NA 0 4

Gamma Spec 12 Surface Water Mn54 15.0 <4.1 . NA 0 Grab Fess 30.0 <12.6 . NA 0 (pCi/I) Co15.0 <5.0 . NA 0 Co ' °15.0 <5.6 . NA 0 Zn65 30.0 <7.9 NA 0 Zr'5 30.0 <9.0 NA 0 NbW5 15.0 <5.2 . NA 0 cs"4 15.0 <5.2 . NA 0 cs " '18.0 <4.1 . NA 0 Ba1460.0 <31.1 . NA 0 La 4015.0 <7.7 . NA 0 Ce144 - <48.5 . NA 0 Note: Column explanations are at the end of Table B-2.

-- page 74 of 122 --

TABLE B-2 (continued)

Medium or Type of Lower All Location Control Number of Pathway Analysis Limit of Indicator with Highest Locations: Non-routine Sampled - -Detection Locations: Annual Reported Total (LLD) Mean Mean (f) - Measurements (Unit of Number Mean (f)

Measurement) Performed (Range) Name (Range)

Distance -

Direction Mean (f) -

_ _(Range)

Tritium 3,000 <158 NA 0 12 I131 1.0 <0.8 NA 0 12 Gamma Spec Surface Water 36 Composite Mn" 15.0 <7.1 . NA (pCi/l) Fe" 30.0 <12.6 NA 0 Col,15.0 <6.0 . NA 0 Co ' °15.0 <6.6 NA 0 Zn65 30.0 <9.5 , NA 0 Zr's 30.0 <15.8 . NA 0 Nb 15.0 <7.5 . NA 0 Cs 134 15.0 <6.9 . NA 0 cs13 18.0 <6.8 . NA 0 Ba140 60.0 <54.7 . NA 0 La1 15.0 <10.7 . NA 0 Ce'44- <58.1 . NA 0 Note: Column explanations are at the end of Table B-2.

-- page 75 of 122 --

TABLE B-2 (continued)

Medium or Type of Lower All Location Control Number of Pathway Analysis Limit of Indicator with Highest Locations: Non-routine Sampled - -Detection Locations: Annual Reported Total (LLD) Mean Mean (f) - Measurements (Unit of Number Mean (f)

Measurement) Performed (Range) Name (Range)

Distance -

Direction Mean (f) -

(Range) ]

Gross Beta 4 1.4 (0/12) CL-14 NA 0 12 (0.8 - 2.5) 0 Miles 1.4 (0/12)

(0.8 - 2.5)

Tritium 3,000 <279 . NA 0 4

Gamma Drinking Spec Water 12 (pCi/I)

Mn 15.0 <4.7 . NA Fe5 30.0 <10.5 - NA 0 Coa 15.0 <5.7 - NA 0 Co" 15.0 <5.3 - NA 0 Zn$5 30.0 <8.9 - NA 0 Zr" 300 <11.5 - NA 0 Nb" 15.0 <4.8 - NA 0 Cs" 4 15.0 <5.3 - NA 0 cs137 18.0 <6.9 . NA 0 BaI4060.0 <41.6 . NA 0 La1415.0 <8.2 . NA 0 Ce144- <54.6 . NA 0 Note: Column explanations are at the end of Table B-2.

-- page 76 of 122 --

TABLE B-2 (continued)

Medium or Type of Lower All Location Control Number of Pathway Analysis Limit of Indicator with Highest Locations: Non-routine Sampled - -Detection Locations: Annual Reported Total (LLD) Mean Mean (f) - Measurements (Unit of Number Mean (f)

Measurement) Performed (Range) Name (Range)

Distance -

Direction Mean (f) -

(Range) l._ _

Tritium 3,000 <163 NA 0 12 Gamma Spec 12 Mn"4 15.0 <4.9 - NA 0 Well Water Fe"o 30.0 <11.5 NA 0 (pCi/l) C"u 15.0 <5.7 NA 0 Co'° 15.0 <5.4 NA 0 Zn65 30.0 <8.6 NA 0 Zr"5 30.0 <6.0 NA 0 Nb" 15.0 <13.5 NA 0 Cs"' 15.0 <5.6 NA 0 Cs"7 18.0 <7.7 NA 0 Ba140 60.0 <35.1 NA 0 La140 15.0 <8.6 NA 0 Ce44 - <46.8 NA 0 1131 1.0 <0.4 l NA 0 19 Gamma Milk (pCi/I) Spec Cs 134 15.0 <8.7 l NA 0 Cs 137 18.0 <7.5 - NA 0 Ba 14' 60.0 <31.6 - NA 0 La 14' 15.0 <12.1 - NA 0 (U) Untreated well water sample Note: Column explanations at the end of Table B-2.

- page 77 of 122 --

TABLE B-2 (continued)

Location with Highest Medium or Type of All Annual Control Pathway Analysis Lower Indicator Mean Locations: Number of Sampled Limit of Locations: Name Non-routine Total Detection Dist Mean (f) - Reported (Unit of Number (LLD) Mean (f) Direction --- (Ra  ; Measurements Measurement) Nufomber Direction-------- (Range)

Mean (f) -

(Range)

Gamma Spec Vegetables 40 (pCi/g wet) 1131 .060 <0.058 . <.034 0 Cs" 4 .060 <0.028 . <.028 0 cs137 .080 <0.031 <.024 0 Gamma Spec Grass 56 (pCi/g wet) I., .060 0.047 . NA 0 Cs"4 .060 0.032 . NA 0 Cs'37 .080 0.037 NA 0 Gamma Spec 16 Fish Mn 54 0.130 <0.021 . <0.024 0 Fe"9 0.260 <0.069 . <0.051 0 (pCi/g wet) Coss 0.130 <0.026 . <0.029 0 COGO 0.130 <0.021 . <0.019 0 Zn65 0.260 <0.048 . <0.051 0 Cs"4 0.130 <0.021 . <0.024 0 Cs"37 0.150 <0.020 <0.027 0 Gamma Shoreline Spec Sediments 2 (pCi/g dry) Cs"'4 0.150 <0.024 NA 0 CS137 0.180 <0.014 - NA 0 Note: Column explanations at the end of Table B-2.

-- page 78 of 122 --

TABLE B-2 (continued)

Location with Highest Type of Annual Control Medium or All Analysis Indicator Mean Locations: Number of Pathway Lower Sampled Limit of Locations: Non-routine Detection Name Mean (f) - Reported Total Distance - Measurements (Unit of (LLD) Mean (f)

Number Direction (Range)

Measurement) (Range)

Performed Mean (f) -

(Range)

I Column 1 l Column 2 l Column 3 l Column 4 l Column 5 l Column 6 l Column 7 l TABLE EXPLANATIONS:

Column 1: The Unit of Measurement describes all the numerical values for LLD, Mean and Range reported for a particular sample medium. For example: the Gross Beta LLD in AIR PARTICULATES is 0.010 pCi/m3 . Abbreviations used are: pCi/m 3 = pico-curie per cubic meter of sampled air; mRem/quarter = exposure measured for calendar quarter period; pCi/I = pico-curie per liter of sample; pCi/g = pico-curie per gram of sample.

Column 2: The Types of Analyses are described as follows: Gamma Spec =

measurement of each radioisotope in a sample using Gamma Spectroscopy; Gross Betas and Gross Alphas = measurement of the radioactivity in a sample by measurement of emitted betas and alphas - no determination of individual radioisotopes is possible; Tritium = measurement of tritium (H3) in sample by liquid scintillation counting method; TLD = direct measurement of gamma exposure using thermoluminescent dosimeters. Total number of analyses does not include duplicate analyses, recounts, or reanalysis. Only ODCM required LLDs and detectable activity (excluding some naturally occurring activity such as Bi212) results are reported in this table. All sample results can be found in Appendix E of this report.

Column 3: The ODCM required LLD is given when applicable. LLD reported is the highest of those reported for each of the analyses during the year; if all analyses reported positive values, no LLD is reported. It should be noted that - in most cases - the CPS REMP uses lower detection limits than required.

-- page 79 of 122 --

TABLE B-2 (continued)

Location with Type ofHighest Medium or Type of All Annual Mean Control Pathway Analysis Lower Indicator Locations: Number of Sampled Limit of Locations: Name Non-routine Detection- -Distance - Mean (f) - Reported (Unit of Number (LLD) Mean (f) Direction - -Measurements Measurement) Performed (Range) - - M e(Range)

Mean (f)-

(Range)

Column 1 Column 2 Column 3 l Column 4 l Column 5 l Column 6 Column 7 TABLE EXPLANATIONS (continued):

Column 4: Samples taken at Indicator Locations during an operational Radiological Environmental Monitoring Program (REMP) reliably measure the quantities of any radioisotopes cycling through the pathways to man from a nuclear station. The reported values are the mean or average for the year of all samples of that type which had values greater than the LLD. (f) is the fraction of all the samples taken at all indicator locations for the medium, which reported values greater than the LLD. Example: Seven (7) results greater than LLD out of fifteen (15) samples taken would be reported as 7/15. The Range is the values of the lowest to highest sample results greater than LLD reported at all the indictor locations for that medium.

Column 5: The Mean, f-fraction and Range along with the name of the location, distance from the CPS gaseous effluent stack in miles, and the letter name corresponding to the compass sector in the direction of the sample location from the CPS HVAC gaseous effluent stack. The location with the highest annual mean is compared to both Indicator and Control Locations of the medium samples.

Column 6: Control locations are sited in areas with low relative deposition and /

or dispersion factors. Sample results are used as reference for the control location.

Column 7: NRC Regulations [Branch Technical Position, Revision. 1, November 1979] include a table of radioisotope concentrations that, if exceeded by confirmed sample measurements, indicate that a Non-routine Reported Measurement exists. Such measurements require further investigation to validate the source.

-- page 80 of 122 --

APPENDIX C Glossary Activation - the process in which stable atoms become radioactive atoms by absorbing neutrons.

ALARA - acronym for "As Low As Reasonably Achievable" which applies to many facets of nuclear power (i.e., radiation exposure for personnel kept low, minimizes number / activity of effluent releases).

Alpha particle - a charged particle emitted from the nucleus of an atom having a mass and charge equal in magnitude to a helium nucleus which has two protons and two neutrons.

Atom - the smallest component of an element having all the properties of that element. Comprised of protons, neutrons and electrons such that the number of protons determines the element.

Background radiation - source of radiation that mankind has no control over, such as cosmic (from the sun) and terrestrial (naturally occurring radioactive elements).

Beta particle - a charged particle equivalent to an electron if negative or a positron if positive, originating near the nucleus of an atom during radioactive decay or fission.

Control Location - a sample collection location considered to be far enough away from the Clinton Power Station so as not to be influenced by station operations.

Cosmic radiation - penetrating ionizing radiation originating from the sun and from outer space varying from altitude and latitude.

Curie (Ci) - the unit of radioactivity equal to 2.2 trillion disintegrations per minute.

Dead water - water that contains no tritium.

Dose - a quantity (total or accumulated) of ionizing radiation received.

Dose equivalent - a quantity used in radiation protection that expresses all radiations on a common scale for calculating the effective absorbed dose (the unit of dose equivalent is the rem).

Ecology - a branch of biology dealing with the relations between organisms and their environment.

Electromagnetic radiation - a traveling wave motion resulting from changing electric or magnetic fields. Familiar sources of electromagnetic radiation range from x-rays (and gamma rays) of short wavelength, through the ultraviolet, visible and infrared regions, to radar and radio waves of relatively long wavelength. All electromagnetic radiation travels in a vacuum at the speed of light.

-- page 81 of 122 --

Element - one of 103 known chemical substances that cannot be broken down further without changing its chemical properties.

Environment - the aggregate of surrounding things, conditions, or influences.

Exposure - a measure of the ionization produced in air by x-ray or gamma radiation. Acute exposure is generally accepted to be a large exposure received over a short period of time. Chronic exposure is exposure received over a long period of time.

Fission - process by which an atomic nucleus splits into two smaller nuclei and releases neutrons and energy.

Fission products - the nuclei formed as part of the fissioning of an atomic nucleus.

Gamma rays - high energy, short wavelength electromagnetic radiation emitted from the nucleus.

Half-life - the time required for half of a given amount of a radionuclide to decay.

Indicator Location - a sample collection strategically placed to monitor dose rate or radioactive material that may be the result of Clinton Power Station operations.

Ionization - the process by which a neutral atom or molecule acquires a positive or negative charge.

Irradiation - exposure to radiation.

Lower Limit of Detection (LLD) - the smallest amount of sample activity that will give a net count for which there is a confidence at a predetermined level that the activity is actually present.

Microcurie (pCi) - one millionth of a curie and represents 2.2 million decays per minute.

Neutron - one of the three basic parts of an atom, which has no charge and is normally, found in the nucleus (center) of an atom.

Nucleus - the center of an atom containing protons and neutrons; determines the atomic weight and contributes to the net positive charge of an atom. Nuclei (plural).

Nuclides - atoms which all have the same atomic number and mass number.

Periphyton - water plant life (i.e., algae).

Radiation - the process by which energy is emitted from a nucleus as particles (alpha, beta, and neutron) or waves (gamma).

Radionuclide - a radioactive species of an atom characterized by the constitution of its nucleus. The number of protons, number of neutrons, and energy content specify the nuclear constitution.

-- page 82 of 122--

Rem - the unit of dose of any ionizing radiation that produces the same biological effects as a unit of absorbed dose of ordinary x-rays. Acronym for Roentgen Equivalent Man.

Roentgen - a measure of ionization produced in air by x-ray or gamma radiation.

Site boundary - the site boundary is the line beyond which the land is neither owned, nor leased, nor otherwise controlled by the licensee.

Statistics - the science that deals with the collection, classification, analysis and interpretation of numerical data by use of mathematical theories of probabilities.

Target tissue - any tissue or organ of the body in which radiation is absorbed.

Terrestrial radiation - source of radiation pertaining to the ground (Earth's crust).

X-rays - high energy, short wavelength electromagnetic radiation, emitted from the electron shells of an atom.

- page 83 of 122 --

APPENDIX D Exceptions to the REMP During 2004 Data from the radiological analysis of environmental samples are routinely reviewed and evaluated by the ODCM Program Owner at the Clinton Power Station (CPS). This data is checked for LLD compliance, anomalous values, quality control sample agreement, and any positive results which are inconsistent with expected results - or - which exceed any Offsite Dose Calculation Manual (ODCM) reporting levels. Reporting levels for radioactivity concentrations from environmental samples are required by the Station's ODCM and are listed in Table 3-A of this report.

If an inconsistent result occurs, an investigation is initiated which may consist of one, some, or all of the following actions:

-* Examine the collection data sheets for any indication of collection or delivery errors, tampering, vandalism, equipment calibration or any malfunction[s] as a result of electrical power failure[s], weather conditions, blown fuses, etc.

• Perform statistical tests

• Examine previous data for trends

• Review other results from same sample media and different sample media

• Review control station data

• Review quality control or duplicate sample data

• Review CPS Radiological Effluent Release Reports

• If possible, recount and / or reanalyze the sample

• Collect additional follow-up samples as warranted During 2004, no investigations were performed as a result of reaching any ODCM reporting levels. All sample analysis required by the ODCM achieved the LLDs specified by the Station's ODCM (refer to Table 3-B of this report).

Sampling and analysis exceptions are listed in this appendix.

-- page 84 of 122 --

SAMPLING AND ANALYSIS EXCEPTIONS FOR 2004 The exceptions described below are those that are considered 'deviations' from the Radiological Environmental Monitoring Program as required by the Station's ODCM. By definition, 'deviations' are permitted as delineated within NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants," October 1978, and within Radiological Assessment Brach Technical Position, Revision 1, November 1979 which states.... "Deviations are permitted from the required sampling schedule if specimens are unobtainable due to hazardous conditions, seasonal unavailability, malfunction of automatic sampling equipment and other legitimate reasons".... The below section addresses the reporting requirements found within Section 7.1 of the Station's ODCM.

25 March 2004

• During the performance of the First Quarter Environmental TLD Changeout, REMP TLD CL-47 was found to be missing from the respective TLD Sample Holder. A subsequent investigation concluded that an unauthorized individual[s] who frequent public access areas, most likely removed this REMP TLD from the Sample Holder.

10 July 2004

• During the performance of the Second Quarter Environmental TLD Changeout, REMP TLD CL-47 was found to be missing from the respective TLD Sample Holder. A subsequent investigation concluded that an unauthorized individual[s] who frequent public access areas, most likely removed this REMP TLD from the Sample Holder.

25 August 2004

• During the performance of the August Monthly Vegetation Collection Surveillance, CL-117 was only able to obtain two (2) of the required three (3) broadleaf vegetables, CL- 15 was short by .2 pounds on lettuce and CL-118 came up short .4 pounds on cabbage. A subsequent investigation revealed that due to wildlife consumption, some premature rotting and weed growth, the collection of the remaining broadleaf vegetables did not meet the minimum weight criteria. Per Regulatory Guide 4.8, substitutions are permitted during season unavailability.

-- page 85 of 122 -

SAMPLING AND ANALYSIS EXCEPTIONS FOR 2004 (continued) 29 September 2004

• During the performance of the September Monthly Vegetation Collection Surveillance, CL-117 was only able to obtain two (2) of the required three (3) broadleaf vegetables, CL-115 was only able to obtain two (2) of the required three (3) broadleaf vegetables, CL-118 was only able to obtain one (1) of the required three (3) broadleaf vegetables and CL-1 14 was only able to obtain two (2) of the required three (3) broadleaf vegetables. A subsequent investigation revealed that due to wildlife consumption, some premature rotting and weed growth, the collection of the remaining broadleaf vegetables did not meet the minimum weight criteria. Per Regulatory Guide 4.8, substitutions are permitted during season unavailability.

29 September 2004

• During the performance of the September Monthly Water Composite Collection Surveillance at the CL-14 Drinking Water Compositor, maintenance was occurring elsewhere within the Plant Service Building whereby the water supply to the CL-14 Drinking Water Compositor was secured. This precluded 'composite sampling' and resulted in a partial

.grab sample' as a contingency for the balance of September.

25 October 2004

• During the performance of the October Monthly Water Composite Collection Surveillance at the CL-91 Upstream Lake Sample Compositor, a dead battery condition was found. Subsequent maintenance by the vendor revealed additional internal damage along with the degraded battery condition. This precluded 'composite sampling' and resulted in a partial

'grab sample' as a contingency for the balance of October.

17 November 2004

• During the performance of the November Monthly Water Composite Collection Surveillance at the CL-90 Downstream Discharge Compositor, scheduled maintenance to replace the Compositor Weather Enclosure occurred. This precluded 'composite sampling' during the Compositor Weather Enclosure replacement resulting in a partial 'grab sample' to augment the minimum criterion for analysis.

-- page 86 of 122 --

SAMPLING AND ANALYSIS EXCEPTIONS FOR 2004 (continued) 27 November 2004

• During the performance of the Weekly Air Sample Collection Surveillance at air sample station CL-06, a non-ODCM required air sample, the air sampler was found not in service due to power lines throughout the surrounding area being down as a result of sustained winds of 40-plus mph with gusts to 53 mph. Although power was restored and subsequent sample volume calculations revealed that the minimum sample volume still had been achieved; the ODCM expectation of 'continuous monitoring' had not been met.

-- page 87 of 122 --

APPENDIX E CPS Radiological Environmental Monitoring Results During 2004

-- page 88 of 122 --

GROSS BETA ACTIVITY IN AIR PARTICULATES FOR 2004 (pCI/m 3)

DATE COLLECTED CL-1 CL-2 CL-3 CL-4 CL-6 07-Jan-04 0.055 _ 0.005 0.050 +/- 0.005 0.037 +/- 0.004 0.040 +/- 0.004 0.034 +/- 0.004 14-Jan-04 0.040 _ 0.004 0.041 +/- 0.005 0.042 +/- 0.005 0.045 +/- 0.005 0.040 +/- 0.005 21-Jan-04 0.027 _ 0.004 0.026 +/- 0.004 0.025 +/- 0.004 0.024 +/- 0.004 0.023 +/- 0.004 28-Jan-04 0.031 _ 0.004 0.023 +/- 0.004 0.025 +/- 0.004 0.025 +/- 0.004 0.027 +/- 0.004 04-Feb-04 0.039 _ 0.004 0.047 +/- 0.004 0.043 +/- 0.004 0.042 +/- 0.004 0.042 +/- 0.004 11-Feb-04 0.052 _ 0.005 0.056 +/- 0.005 0.054 +/- 0.005 0.055 +/- 0.005 0.052 +/- 0.005 18-Feb-04 0.028 _ 0.004 0.031 +/- 0.004 0.030 +/- 0.004 0.027 +/- 0.004 0.030 +/- 0.004 25-Feb-04 0.029 +/- 0.004 0.027 +/- 0.004 0.026 +/- 0.004 0.027 +/- 0.004 0.025 +/- 0.004 03-Mar-04 0.028 +/- 0.004 0.025 +/- 0.004 0.024 +/- 0.004 0.024 +/- 0.004 0.022 +/- 0.004 10-Mar-04 0.019 +/- 0.004 0.018 +/- 0.004 0.023 +/- 0.004 0.020 +/- 0.004 0.020 +/- 0.004 17-Mar-04 0.028 +/- 0.004 0.022 +/- 0.004 0.022 +/- 0.004 0.021 +/- 0.004 0.020 +/- 0.004 24-Mar-04 0.017 +/- 0.003 0.016 +/- 0.003 0.016 +/- 0.003 0.021 +/- 0.003 0.017 +/- 0.004 31-Mar-04 0.016 +/- 0.003 0.018 +/- 0.004 0.014 +/- 0.003 0.015 +/- 0.003 0.017 +/- 0.003 07-Apr-04 0.018 0.004 0.020 +/- 0.004 0.019 +/- 0.004 0.019 +/- 0.004 0.018 +/- 0.004 14-Apr-04 0.047 + 0.004 0.037 +/- 0.004 0.033 +/- 0.004 0.031 +/- 0.004 0.030 +/- 0.004 21 -Apr-04 0.029 0.004 0.027 +/- 0.004 0.026 +/- 0.004 0.026 +/- 0.004 0.026 +/- 0.004 28-Apr-04 0.016 +/- 0.003 0.019 +/- 0.003 0.019 +/- 0.003 0.016 +/- 0.003 0.019 +/- 0.003 05-May-04 0.027 + 0.004 0.031 +/- 0.004 0.027 +/- 0.004 0.023 +/- 0.004 0.028 +/- 0.004 12-May-04 0.032 +/- 0.004 0.030 +/- 0.004 0.029 +/- 0.004 0.027 +/- 0.004 0.029 +/- 0.004 19-May-04 0.016 +/- 0.004 0.013 +/- 0.003 0.016 +/- 0.004 0.014 +/- 0.003 0.013 +/- 0.004 26-May-04 0.016 + 0.003 0.017 +/- 0.003 0.017 +/- 0.003 0.017 +/- 0.003 0.019 +/- 0.004 02-Jun-04 0.017 +/- 0.004 0.017 +/- 0.004 0.015 +/- 0.004 0.015 +/- 0.004 0.018 +/- 0.004 09-Jun-04 0.027 0.003 0.021 +/- 0.003 0.023 +/- 0.003 0.021 +/- 0.003 0.020 +/- 0.003 16-Jun-04 0.018 +/- 0.003 0.019 +/- 0.003 0.017 +/- 0.003 0.018 +/- 0.003 0.013 +/- 0.003 23-Jun-04 0.017 +/- 0.003 0.015 +/- 0.003 0.014 +/- 0.003 0.017 +/- 0.003 0.016 +/- 0.003 30-Jun-04 0.024 _ 0.004 0.024 +/- 0.004 0.021 +/- 0.004 0.018 +/- 0.004 0.021 +/- 0.004 07-Jul-04 0.024 _ 0.003 0.025 +/- 0.003 0.026 +/- 0.004 0.021 +/- 0.003 0.023 +/- 0.003 14-Jul-04 0.014 + 0.004 0.014 +/- 0.003 0.015 +/- 0.004 0.013 +/- 0.003 0.015 +/- 0.004 21-Jul-04 0.025 + 0.004 0.024 +/- 0.004 0.024 +/- 0.004 0.022 +/- 0.003 0.027 +/- 0.004 28-Jul-04 0.028 + 0.004 0.026 +/- 0.004 0.027 +/- 0.004 0.024 +/- 0.004 0.025 +/- 0.004 04-Aug-04 0.036 +/- 0.004 0.035 +/- 0.004 0.039 +/- 0.004 0.035 +/- 0.004 0.035 +/- 0.004 11-Aug-04 0.020 +/- 0.003 0.021 +/- 0.003 0.020 +/- 0.003 0.020 +/- 0.003 0.019 +/- 0.003 18-Aug-04 0.027 +/- 0.004 0.022 +/- 0.003 0.025 +/- 0.003 0.025 +/- 0.004 0.023 +/- 0.004 25-Aug-04 0.027 +/- 0.004 0.029 + 0.004 0.024 +/- 0.003 0.025 +/- 0.003 0.022 +/- 0.004 01-Sep-04 0.016 +/- 0.003 0.019 +/- 0.003 0.017 +/- 0.003 0.012 +/- 0.003 0.017 +/- 0.003 08-Sep-04 0.024 +/- 0.004 0.029 + 0.004 0.028 +/- 0.004 0.029 +/- 0.004 0.028 +/- 0.004 15-Sep-04 0.025 +/- 0.003 0.025 + 0.003 0.024 +/- 0.003 0.022 +/- 0.003 0.020 +/- 0.003 22-Sep-04 0.023 +/- 0.004 0.024 +/- 0.004 0.021 +/- 0.003 0.020 +/- 0.003 0.024 +/- 0.004 29-Sep-04 0.026 +/- 0.004 0.027 +/- 0.004 0.023 +/- 0.004 0.026 +/- 0.004 0.020 +/- 0.004 06-Oct-04 0.018 +/- 0.003 0.021 +/- 0.004 0.022 +/- 0.004 0.020 +/- 0.004 0.020 +/- 0.004 13-Oct-04 0.031 +/- 0.004 0.032 +/- 0.004 0.035 +/- 0.004 0.031 +/- 0.004 0.033 +/- 0.004 20-Oct-04 0.020 +/- 0.004 0.019 +/- 0.004 0.021 +/- 0.004 0.017 +/- 0.004 0.014 +/- 0.003 27-Oct-04 0.024 +/- 0.004 0.027 + 0.004 0.027 +/- 0.004 0.026 +/- 0.004 0.022 +/- 0.004 03-Nov-04 0.021 +/- 0.003 0.022 +/- 0.003 0.021 +/- 0.003 0.023 +/- 0.003 0.021 +/- 0.003 10-Nov-04 0.026 +/- 0.004 0.022 +/- 0.003 0.027 +/- 0.004 0.024 +/- 0.004 0.027 +/- 0.004 17-Nov-04 0.031 +/- 0.003 0.027 + 0.003 0.028 +/- 0.003 0.028 +/- 0.003 0.025 +/- 0.002 24-Nov-04 0.031 +/- 0.004 0.032 + 0.003 0.032 +/- 0.004 0.029 +/- 0.004 0.032 +/- 0.004 01-Dec-04 0.017 +/- 0.004 0.017 +/- 0.004 0.022 +/- 0.003 0.018 +/- 0.003 0.020 +/- 0.004 08-Dec-04 0.037 +/- 0.005 0.033 +/- 0.004 0.033 +/- 0.004 0.037 +/- 0.004 0.037 +/- 0.005 15-Dec-04 0.033 +/- 0.004 0.033 +/- 0.004 0.038 +/- 0.004 0.029 +/- 0.004 0.032 +/- 0.004 22-Dec-04 0.029 +/- 0.004 0.028 +/- 0.004 0.026 +/- 0.004 0.029 +/- 0.004 0.029 +/- 0.004 29-Dec-04 0.038 +/- 0.004 0.035 +/- 0.004 0.033 +/- 0.004 0.040 +/- 0.004 0.032 +/- 0.004

-- page 89 of 122 --

GROSS BETA ACTIVITY IN AIR PARTICULATES FOR 2004 (continued)

DATE COLLECTED CL-7 CL-8 CL-11 CL-15 CL-94 07-Jan-04 0.028 i 0.004 0.039 +/- 0.005 0.040 +/- 0.004 0.028 +/- 0.004 0.035 +/- 0.005 14-Jan-04 0.035 +/- 0.004 0.044 +/- 0.005 0.038 +/- 0.004 0.037 +/- 0.004 0.039 +/- 0.005 21-Jan-04 0.022 +/- 0.004 0.021 +/- 0.004 0.025 +/- 0.004 0.024 +/- 0.004 0.027 +/- 0.004 28-Jan-04 0.023 i 0.004 0.021 +/- 0.004 0.025 +/- 0.004 0.022 +/- 0.004 0.026 +/- 0.004 04-Feb-04 0.041 +/- 0.004 0.042 +/- 0.004 0.041 +/- 0.004 0.042 +/- 0.004 0.039 +/- 0.004 11-Feb-04 0.053 +/- 0.005 0.053 +/- 0.005 0.044 +/- 0.004 0.051 +/- 0.005 0.051 +/- 0.005 18-Feb-04 0.027 +/- 0.004 0.032 +/- 0.004 0.027 +/- 0.004 0.028 +/- 0.004 0.031 +/- 0.004 25-Feb-04 0.024 +/- 0.004 0.028 +/- 0.004 0.028 +/- 0.004 0.026 +/- 0.004 0.026 +/- 0.004 03-Mar-04 0.019 +/- 0.004 0.029 +/- 0.004 0.038 +/- 0.005 0.022 +/- 0.005 0.024 +/- 0.004 10-Mar-04 0.022 +/- 0.004 0.019 +/- 0.004 0.023 +/- 0.004 0.023 +/- 0.004 0.022 +/- 0.004 17-Mar-04 0.020 +/- 0.004 0.021 +/- 0.004 0.024 +/- 0.004 0.020 +/- 0.004 0.023 +/- 0.004 24-Mar-04 0.019 +/- 0.004 0.018 +/- 0.004 0.018 +/- 0.004 0.021 +/- 0.003 0.016 +/- 0.003 31-Mar-04 0.014 +/- 0.003 0.017 +/- 0.003 0.016 +/- 0.003 0.017 +/- 0.003 0.016 +/- 0.003 07-Apr-04 0.015 +/- 0.004 0.018 +/- 0.004 0.020 +/- 0.004 0.021 +/- 0.004 0.026 +/- 0.004 14-Apr-04 0.026 +/- 0.003 0.037 +/- 0.004 0.052 +/- 0.004 0.034 +/- 0.004 0.027 +/- 0.003 21-Apr-04 0.023 +/- 0.004 0.023 +/- 0.004 0.026 +/- 0.004 0.025 +/- 0.004 0.028 +/- 0.004 28-Apr-04 0.019 +/- 0.003 0.017 +/- 0.003 0.019 +/- 0.003 0.023 +/- 0.003 0.018 +/- 0.003 05-May-04 0.024 +/- 0.004 0.027 +/- 0.004 0.029 +/- 0.004 0.025 +/- 0.004 0.024 +/- 0.004 12-May-04 0.031 +/- 0.004 0.026 +/- 0.004 0.028 +/- 0.004 0.034 +/- 0.004 0.029 +/- 0.004 19-May-04 0.011 +/- 0.003 0.012 +/- 0.003 0.012 +/- 0.003 0.014 +/- 0.004 0.013 +/- 0.004 26-May-04 0.016 +/- 0.003 0.014 +/- 0.003 0.018 +/- 0.003 0.015 +/- 0.003 0.019 +/- 0.004 02-Jun-04 0.013 +/- 0.004 0.015 +/- 0.004 0.017 + 0.004 0.016 +/- 0.004 0.014 +/- 0.004 09-Jun-04 0.020 +/- 0.003 0.019 +/- 0.003 0.024 +/- 0.003 0.018 +/- 0.003 0.021 +/- 0.003 16-Jun-04 0.017 +/- 0.003 0.017 +/- 0.003 0.020 +/- 0.003 0.017 +/- 0.003 0.016 +/- 0.003 23-Jun-04 0.014 +/- 0.003 0.018 +/- 0.003 0.017 +/- 0.003 0.017 +/- 0.003 0.019 +/- 0.003 30-Jun-04 0.020 +/- 0.003 0.020 +/- 0.004 0.023 +/- 0.004 0.022 +/- 0.004 0.020 +/- 0.004 07-Jul-04 0.025 +/- 0.004 0.023 +/- 0.003 0.027 +/- 0.003 0.026 +/- 0.003 0.022 +/- 0.003 14-Jul-04 0.017 +/- 0.004 0.014 +/- 0.004 0.013 +/- 0.003 0.012 +/- 0.003 0.014 +/- 0.004 21-Jul-04 0.024 +/- 0.003 0.024 +/- 0.004 0.024 i 0.003 0.023 +/- 0.003 0.026 +/- 0.004 28-Jul-04 0.024 +/- 0.004 0.023 +/- 0.004 0.024 +/- 0.004 0.028 +/- 0.004 0.027 +/- 0.004 04-Aug-04 0.032 +/- 0.004 0.036 +/- 0.004 0.034 +/- 0.004 0.035 +/- 0.004 0.039 +/- 0.004 11-Aug-04 0.015 +/- 0.003 0.018 +/- 0.003 0.023 +/- 0.004 0.020 +/- 0.003 0.020 +/- 0.003 18-Aug-04 0.026 +/- 0.003 0.024 +/- 0.003 0.026 +/- 0.003 0.025 +/- 0.003 0.028 +/- 0.004 25-Aug-04 0.025 +/- 0.004 0.027 +/- 0.004 0.029 +/- 0.004 0.025 +/- 0.003 0.026 +/- 0.004 01-Sep-04 0.013 +/- 0.003 0.017 +/- 0.003 0.018 +/- 0.003 0.016 +/- 0.003 0.016 +/- 0.003 08-Sep-04 0.027 +/- 0.004 0.028 +/- 0.004 0.033 +/- 0.004 0.030 +/- 0.004 0.029 +/- 0.004 15-Sep-04 0.019 +/- 0.003 0.024 i 0.003 0.025 +/- 0.003 0.023 +/- 0.003 0.022 +/- 0.003 22-Sep-04 0.023 +/- 0.003 0.026 +/- 0.004 0.024 +/- 0.003 0.021 +/- 0.003 0.024 +/- 0.004 29-Sep-04 0.025 +/- 0.004 0.029 +/- 0.004 0.027 +/- 0.004 0.025 +/- 0.004 0.026 +/- 0.004 06-Oct-04 0.019 +/- 0.004 0.020 +/- 0.004 0.028 +/- 0.004 0.020 +/- 0.004 0.024 +/- 0.004 13-Oct-04 0.028 +/- 0.004 0.030 +/- 0.004 0.030 +/- 0.004 0.032 +/- 0.004 0.032 +/- 0.004 20-Oct-04 0.020 +/- 0.004 0.019 +/- 0.004 0.021 +/- 0.004 0.017 +/- 0.004 0.016 +/- 0.004 27-Oct-04 0.019 +/- 0.004 0.027 +/- 0.004 0.026 +/- 0.004 0.022 +/- 0.004 0.026 +/- 0.004 03-Nov-04 0.021 +/- 0.003 0.022 +/- 0.003 0.023 +/- 0.003 0.024 +/- 0.003 0.021 +/- 0.003 10-Nov-04 0.028 +/- 0.004 0.024 +/- 0.004 0.029 +/- 0.004 0.024 +/- 0.003 0.023 +/- 0.003 17-Nov-04 0.026 +/- 0.002 0.025 +/- 0.002 0.029 +/- 0.003 0.028 +/- 0.003 0.030 +/- 0.003 24-Nov-04 0.032 +/- 0.004 0.030 +/- 0.004 0.031 +/- 0.004 0.029 +/- 0.004 0.028 +/- 0.004 01-Dec-04 0.020 +/- 0.003 0.019 +/- 0.003 0.022 +/- 0.003 0.021 +/- 0.003 0.019 +/- 0.003 08-Dec-04 0.033 +/- 0.004 0.038 +/- 0.005 0.038 +/- 0.005 0.034 +/- 0.004 0.033 +/- 0.004 15-Dec-04 0.029 +/- 0.004 0.034 +/- 0.004 0.038 +/- 0.004 0.031 +/- 0.004 0.026 +/- 0.004 22-Dec-04 0.029 +/- 0.004 0.025 +/- 0.004 0.032 +/- 0.004 0.026 +/- 0.004 0.025 +/- 0.004 29-Dec-04 0.029 +/- 0.004 0.033 +/- 0.004 0.037 +/- 0.004 0.034 +/- 0.004 0.035 +/- 0.004

• Control Location, all other locations are Indicator Locations.

-- page 90 of 122 --

GAMMA ISOTOPIC ACTIVITY IN AIR PARTICULATES FOR 2004 (pCllm')

SITE ISOTOPE 1ST QTR 2ND QTR 3RD QTR 47H QTR CL-1 Be 7 0.063 +/- 0.018 0.057 +/- 0.018 0.082 +/- 0.021 0.074 +/- 0.016 K40 < 0.022 < 0.022 < 0.023 < 0.029 Co'6 < 0.0008 < 0.0004 < 0.0009 < 0.0009 Nb' 5 < 0.0008 < 0.0009 < 0.0011

• 0.0011 Zr' 5 < 0.0014 < 0.0021 < 0.0013 < 0.0011 Ru'°' < 0.0010 < 0.0008 < 0.0013 < 0.0012 Ru'°' < 0.0065 < 0.0043 < 0.0042 < 0.0048 Cs"4 < 0.0007 < 0.0008 < 0.0009 < 0.0007 13 7 Cs < 0.0009 < 0.0006 < 0.0004 < 0.0005 Ce 14' < 0.0016 < 0.0010 < 0.0020 < 0.0017 Ce 144 < 0.0049 < 0.0027 < 0.0055 < 0.0029 CL-2 Be7 0.058 +/- 0.015 0.070 +/- 0.016 0.073 +/- 0.018 0.062 +/- 0.011 K40 < 0.022 < 0.022 < 0.023 < 0.022 Co"6 < 0.0008 < 0.0005 < 0.0006 < 0.0009 Nb"5 < 0.0006 < 0.0012 < 0.0011 < 0.0006 Zr'5 < 0.0018 < 0.0017 < 0.0012 < 0.0010 Ru'°3 < 0.0008 < 0.0008 < 0.0005 < 0.0008 Ru' 06 < 0.0048 < 0.0049 < 0.0063 < 0.0077 Cs 134 < 0.0007 < 0.0007 < 0.0010 < 0.0005 137 Cs < 0.0008 < 0.0007 < 0.0006 < 0.0007 Ce'41 < 0.0015 < 0.0020 < 0.0018 < 0.0018 Ce 144 < 0.0042 < 0.0047 < 0.0040 < 0.0036 CL-3 Be7 0.055 +/- 0.018 0.069 +/- 0.016 0.068 +/- 0.019 0.069 +/- 0.014 K40 < 0.024 < 0.024 < 0.028 < 0.025 Co"6 < 0.0008 < 0.0004 < 0.0009 < 0.0009 Nb' 5 < 0.0014 < 0.0009 < 0.0011 < 0.0010 Zr's < 0.0015 < 0.0020 < 0.0018 < 0.0007 Ru'°' < 0.0007 < 0.0007 < 0.0007 < 0.0008 Ruloa < 0.0055 < 0.0056 < 0.0049 < 0.0053 Cs"4' < 0.0007 < 0.0006 < 0.0009 < 0.0008 37 Cs' < 0.0009 < 0.0006 < 0.0006 < 0.0005 Ce'41 < 0.0018 < 0.0012 < 0.0020 < 0.0021 Ce 144 < 0.0049 < 0.0056 < 0.0057 < 0.0040

• All 113' results were < 0.07 pCi/m 3

- page 91 of 122 --

GAMMA ISOTOPIC ACTIVITY IN AIR PARTICULATES FOR 2004 (continued)

SITE ISOTOPE 15T QTR 2dD QTR 3RD QTR 4T QTR CL-4 Be7 0.055 +/- 0.014 0.098 +/- 0.021 0.076 +/- 0.017 0.075 +/- 0.016 0

K4 < 0.022 < 0.023 < 0.025 < 0.025 Co'° < 0.0008 < 0.0004 < 0.0005 < 0.0009 Nb' 5 < 0.0007 < 0.0008 < 0.0011 < 0.0008 Zr95 < 0.0009 < 0.0021 < 0.0012 < 0.0010 Ru 103 < 0.0008 < 0.0009 < 0.0011 < 0.0010 Ru10 ' < 0.0032 < 0.0053 < 0.0041 < 0.0069 Cs"4 < 0.0010 < 0.0010 < 0.0008 < 0.0008

< 0.0007 < 0.0007 < 0.0005 < 0.0005 Ce'4 1 < 0.0025 < 0.0015 < 0.0026 < 0.0019 Ce"1 4 < 0.0037 < 0.0043 < 0.0037 < 0.0049 CL-6 Be7 0.060 +/- 0.014 0.098 +/- 0.020 0.073 +/- 0.015 0.057 +/- 0.013 K' 0 < 0.021 < 0.023 < 0.025 < 0.032

< 0.0008 < 0.0004 < 0.0006 < 0.0009 Nb's < 0.0006 < 0.0011 < 0.0015 < 0.0007 Zr' 5 < 0.0018 < 0.0023 < 0.0012 < 0.0021 Ru°03 < 0.0009 < 0.0017 < 0.0011 < 0.0008 Ru106 < 0.0057 < 0.0093 < 0.0050 < 0.0031 Cs134 < 0.0006 < 0.0007 < 0.0010 < 0.0008 Cs137 < 0.0008 < 0.0004 < 0.0007 < 0.0005 Ce14 1 < 0.0014 < 0.0014 < 0.0016 < 0.0024 Ce'44 < 0.0051 < 0.0024 < 0.0062 < 0.0043 CL-7 Be7 0.061 +/- 0.013 0.083 +/- 0.012 0.076 +/- 0.021 0.054 +/- 0.014 K40 < 0.023 < 0.022 < 0.023 < 0.026 Co"6

< 0.0011 < 0.0005 < 0.0009 < 0.0011 Nb95 < 0.0007 < 0.0009 < 0.0016 < 0.0008 Zr' 5 < 0.0012 < 0.0018 < 0.0010 < 0.0007 Ru103 < 0.0009 < 0.0010 < 0.0010 < 0.0006 Ru 1 06 < 0.0045 < 0.0048 < 0.0036 < 0.0030 Cs134 < 0.0006 < 0.0007 < 0.0010 < 0.0010 Cs137 < 0.0007 < 0.0005 < 0.0006 < 0.0004 Ce' 4 ' < 0.0022 < 0.0019 < 0.0021 < 0.0019 Ce144 < 0.0042 < 0.0047 < 0.0024 < 0.0054 CL-8 Be7 0.054 +/- 0.016 0.082 +/- 0.018 0.067 +/- 0.014 0.056 +/- 0.018 K40 < 0.022 < 0.023 < 0.023 < 0.026

< 0.0009 < 0.0005 < 0.0005 < 0.0010 Nb's < 0.0008 < 0.0014 < 0.0009 < 0.0018 Zr95 < 0.0009 < 0.0014 < 0.0007 < 0.0012 Ru103 < 0.0008 < 0.0009 < 0.0007 < 0.0011 Ru 0'6 < 0.0071 < 0.0056 < 0.0042 < 0.0049 Cs134 < 0.0007 < 0.0008 < 0.0009 < 0.0009 Cs137 < 0.0008 < 0.0007 < 0.0008 < 0.0006 Ce 14 ' < 0.0016 < 0.0029 < 0.0012 < 0.0018 Ce'44 < 0.0035 < 0.0054 < 0.0043 < 0.0027

• All I... results were < 0.07 pCi/m'

-- page 92 of 122 --

GAMMA ISOTOPIC ACTIVITY IN AIR PARTICULATES FOR 20040 (continued)

SITE ISOTOPE 1sT QTR 2ND QTR 3RD QTR 4TH QTR CL-11 Be 7 0.059 +/- 0.019 0.072 +/- 0.018 0.080 +/- 0.016 0.055 +/- 0.013 K'° < 0.026 < 0.023 < 0.027 < 0.025 Co'° < 0.0009 < 0.0005 < 0.0005 < 0.0009 N b'5 < 0.0009 < 0.0010 < 0.0011 < 0.0010 Zr"s < 0.0011 < 0.0013 < 0.0014 < 0.0009 Ru1Z" < 0.0012 < 0.0008 < 0.0009 < 0.0006 Ru 1 " < 0.0053 < 0.0043 < 0.0057 < 0.0021 Cs"' < 0.0009 < 0.0007 < 0.0009 < 0.0007 Cs" 7 < 0.0006 < 0.0008 < 0.0008 < 0.0007 Ce141 < 0.0014 < 0.0024 < 0.0022 < 0.0010 Ce1" < 0.0032 < 0.0055 < 0.0048 < 0.0041 CL-15 Be7 0.046 +/-t 0.012 0.074 +/- 0.016 0.080 +/- 0.017 0.045 +/- 0.018 K'° < 0.022 < 0.022 < 0.023 < 0.026 Co'° < 0.0008 < 0.0006 < 0.0005 < 0.0009 Nb"s < 0.0004 < 0.0010 < 0.0012 < 0.0005 Zrs 1

< 0.0007 < 0.0017 < 0.0010 < 0.0021 Ru 03

< 0.0008 < 0.0007 < 0.0008 < 0.0011 Rul" < 0.0050 < 0.0048 < 0.0034 < 0.0028 Cs"' < 0.0007 < 0.0005 < 0.0010 < 0.0008 Cs137 < 0.0008 < 0.0005 < 0.0005 < 0.0006 Ce141 < 0.0023 < 0.0023 < 0.0021 < 0.0020 Ce1" < 0.0033 < 0.0024 < 0.0023 < 0.0056 CL-94 Be7 0.046 +/- 0.013 0.074 +/- 0.017 0.068 +/- 019 0.073 +/- 0.016 K'° < 0.022 < 0.023 < 0.023 < 0.026 Co'° < 0.0009 < 0.0006 < 0.0005 < 0.0009 N b'5 < 0.0010 < 0.0009 < 0.0011 < 0.0011 Zr"s < 0.0018 < 0.0014 < 0.0015 < 0.0011 Ru1Z" < 0.0010 < 0.0008 < 0.0009 < 0.0005 Ru1 e" < 0.0073 < 0.0066 < 0.0050 < 0.0041 Cs"' < 0.0009 < 0.0005 < 0.0009 < 0.0008 Cs 1" < 0.0008 < 0.0008 < 0.0010 < 0.0005 Ce141 < 0.0020 < 0.0017 < 0.0016 < 0.0026 Ce14 ' < 0.0043 < 0.0052 < 0.0055 < 0.0046

• Control Location, all other locations are Indicator Locations.

• All 1'3' results were < 0.07 pCi/m'

- page 93 of 122 --

2004 QUARTERLY TLD RESULTS (mRem / quarter net exposure)

Location 1IT QTR 2 ND QTR 3 RD QTR 4 TH QTR CL-1 21.5 +/-L 2.3 18.4+/-: 1.3 21.9 +/- 0.8 20.2+/- 1.0 CL-2 22.7 +/-t 1.4 19.7 +/- 2.5 22.1 +/- 0.7 19.9 +/- 1.5 CL-3 22.2 +/- 1.6 19.4+/- 1.4 22.4 +/- 2.7 20.4 +/- 1.8 CL-4 22.8+/-0.4 18.9+/- 1.6 21.9 +/- 1.0 20.1 +/- 2.2 CL-5 22.6 +/- 2.3 19.9+/- 1.3 23.7 +/- 3.3 21.9

• 2.4 CL-6 21.0:t 1.7 18.3+/- 1.1 21.1 +/- 1.2 18.1 +/- 2.0 CL-7 22.0 +/- 1.3 17.4+/- 1.0 21.6 +/- 1.4 18.8 +/- 2.6 CL-8 22.9 +/-0.9 18.5 +/-2.0 24.1 +/-2.2 19.9+/-:1.7 CL-11 21.6+/-t0.9 18.9+/-4.1 21.9+/-2.3 19.5+/-2.2 CL-15 21.3 +/- 0.7 18.3 +/- 5.4 21.4 2.5 18.1 +/- 1.6 CL-22 21.6+/- 1.5 19.4+/- 1.9 23.5 +/- 2.3 20.8 +/- 1.2 CL-23 22.5 :+/- 1.2 20.7 +/- 2.8 22.6 +/- 1.7 19.1 +/- 1.0 CL-24 22.5 +/- 1.8 20.4+/- 1.2 23.4 +/- 1.0 21.9

• 2.8 CL-33" 23.8 +/- 1.7 19.4 +/- 2.0 25.7 :t 1.9 21.2 :+/- 2.2 CL-34 23.3 +/- 0.4 20.2 +/- 0.8 25.0 +/- 2.4 20.7 +/- 0.7 CL-35 22.0 +/- 0.6 18.1 +/- 1.6 20.8 +/- 0.8 20.0 +/-t 2.6 CL-36 22.9 +/- 0.8 19.5 +/- 2.0 22.3 +/- 2.2 19.7

• 0.6 CL-37 22.0 +/- 0.5 20.4 +/- 2.3 21.8 :+/- 1.7 19.6* 1.6 CL-41 23.2+/- 2.1 20.2+/-: 1.0 22.9 +/- 1.3 20.7 +/- 1.1 CL-42 22.5 +/- 3.2 18.3 +/- 1.5 22.3 +/- 2.5 20.3 +/- 1.0 CL-43 22.4 +/- 2.2 19.4+/-: 1.8 24.0+/-: 1.4 20.7+/- 1.5 CL-44 24.2 +/- 1.3 20.3 +/- 0.7 24.2 +/- 2.1 21.0 +/- 0.7 CL-45 23.2 +/- 0.6 20.3

• 2.6 22.7 +/- 1.2 20.7 +/- 1.7 CL-46 22.3 :+/- 1.6 18.7 +/- 1.4 21.3 +/- 2.0 20.1 +/- 4.1 CL-47 A A 23.2 +/- 1.3 21.9 +/- 1.5 CL-48 21.7 +/- 0.7 19.5+/-: 1.4 21.9 1.8 20.1 +/- 2.0 CL-49 25.1 +/- 1.8 19.1

• 0.7 22.8+/- 1.4 20.6+/- 1.5 CL-51 22.1 +/- 1.5 20.8 +/- 1.6 24.7 +/- 2.4 20.4 +/- 1.6 CL-52 23.3 +/- 1.5 19.1 +/- 0.4 23.9 +/-2.0 21.0 +/- 1.4 CL-53 22.3 +/- 2.3 19.0 +/- 4.4 21.5+/- 1.1 19.4 +/- 1.6 CL-54 24.3 +/- 0.7 19.5 : 0.5 23.0 +/- 1.0 20.6

• 1.3 CL-55 22.8

• 0.3 19.4 +/- 1.8 23.9 +/- 3.1 20.7 +/- 0.9 CL-56 22.6 +/- 1.9 21.4 2.6 22.9 +/- 0.9 21.3 :t 0.9 CL-57 22.9 +/- 0.8 20.6 +/- 2.1 23.1 +/- 1.7 20.5 +/- 2.0 CL-58 22.5+/- 1.0 19.6+/-t 1.4 22.5 +/- 1.5 20.4 +/- 0.9 CL-60 22.2 +/- 0.6 20.0 +/- 1.9 24.0+/-: 1.4 21.0 +/- 2.1 CL-61 26.6

• 6.4 19.4+/- 2.0 22.3 +/- 1.6 21.2 +/- 1.0 CL-63 22.4 +/- 0.1 17.9 +/- 1.8 20.1 +/- 1.5 18.8 +/- 1.4 CL-64 23.3+/- 1.5 19.9 +/- 2.3 22.9 +/- 1.1 20.6* 2.4 CL-65 22.9 +/- 1.2 19.4 +/- 1.6 24.9 +/- 5.6 20.7* 1.8 CL-74 21.0 +/- 0.3 17.7 +/- 0.5 21.4 +/- 2.1 18.3 +/- 1.2 CL-75 22.8 +/- 1.9 20.6 +/- 2.3 23.5 2.1 19.9

• 1.2 CL-76 21.9 +/- 0.6 18.9 +/- 1.0 23.2 2.2 20.3+/- 1.8 CL-77 21.6 +/- 1.8 19.5 +/- 1.4 23.6 5.5 19.0 +/- 0.8 CL-78 22.9 +/- 0.4 20.6 +/- 2.2 24.6 +/- 4.7 20.6 +/- 1.0

• ODCM Control Location Supplemental Control Locations A No data to report from this location as the entire TLD was missing.

- page 94 of 122 -

2004 QUARTERLY TLD RESULTS (continued)

(mRem I quarter net exposure Location IST QTR 2ND QTR 3RD QTR 4TM QTR CL-79 22.6 + 1.4 19.3 +/- 2.7 24.9 +/- 5.2 19.7 +/- 0.9 CL-80 22.6 +/- 1.1 18.5 +/- 1.5 24.7 +/- 3.7 20.5 +/- 1.3 CL-81 23.8 i 2.8 18.1 +/- 1.5 25.1 +/- 5.8 20.4 +/- 1.7 CL-84 22.2 i 2.4 20.2 +/- 1.3 24.0 +/- 3.6 21.2 +/- 1.0 CL-90 19.6 +/- 2.6 16.0 +/- 1.3 19.8 +/- 1.2 22.7 +/- 4.4 CL-91 21.2 +/- 0.4 19.5 +/- 1.6 22.3 +/- 3.9 19.4 +/- 1.5 CL-97 22.5 +/- 0.8 20.7 +/- 2.1 23.1 +/- 2.1 22.1 +/- 2.1 CL-99 20.1 +/- 1.4 16.8 +/- 1.7 20.9 +/- 4.2 17.5 +/- 1.1 CL-1 14" 20.6 i 0.9 17.7 +/- 1.0 21.3 +/- 2.2 18.9 +/- 1.3

• • Supplemental Control Locations

-- page 95 of 122 --

CL-13 SURFACE WATER ACTIVITY (pCIIl)

Date 28 Jan 04 25 Feb 04 31 Mar 04 28 Apr 04 26 May 04 30 Jun 04 Collected Bet < 33.8 < 33.4 < 40.8 < 39.9 <54.0 < 22.2 K40 < 75.8 < 69.2 <106.0 <79.7 < 96.8 < 51.6 Mn5 <3.8 <4.1 <3.7 <2.9 <3.2 <2.5 Fe"o <4.7 <3.3 < 9.1 <6.5 < 12.6 <6.2 Coss <2.9 < 2.1 <3.3 < 3.1 <3.2 < 1.6 Co"° <2.8 <3.9 <5.2 <2.9 <5.2 <2.0 Zn65 <3.8 <3.7 <3.8 <2.7 <7.2 <3.5 Zr"s <6.5 <6.4 <5.0 < 6.1 <9.0 <6.5 Nb"s < 3.1 <3.6 <3.7 <3.5 <5.2 <2.8 Cs"' <3.5 <3.8 <5.2 <3.0 <4.0 < 2.1 Cs" 7 < 1.9 <4.0 <2.8 <3.2 <3.8 < 1.7 Ba14 < 18.1 < 14.1 < 16.8 < 16.5 < 21.5 < 26.1 La 140 < 1.8 <5.0 <7.7 <3.2 <3.9 <5.5 Ce 144 < 34.2 < 25.2 < 34.1 < 36.5 < 48.5 < 21.5 Date 28 Jul 04 25 Aug 04 28 Sep 04 27 Oct 04 23 Nov 04 29 Dec 04 Collected Be7 < 17.0 < 57.0 < 38.7 < 36.7 <32.8 < 38.0 K40 < 76.0 <116.0 < 29.8 < 65.6 < 74.1 < 81.1 MnS4 <3.0 <3.6 <3.0 <2.9 < 1.6 < 3.1 Fes" <7.3 < 10.2 <4.9 <7.9 <4.0 < 6.1 Coss <2.8 <3.6 < 1.9 <2.6 <5.0 < 1.4 Co'" < 2.1 <5.6 <2.5 <2.7 <3.3 < 1.8 Zn"5 <2.2 <7.9 < 1.9 <4.9 <4.1 <2.5 Zr" <5.4 <6.6 <4.8 <4.7 <6.4 < 4.1 Nbss < 2.1 <4.7 <4.9 <2.8 <4.8 <4.0 cS134

<2.4 < 5.1 < 1.9 <2.3 <3.2 <2.5 Cs"'

<3.5 <3.9 <3.6 <3.2 <4.1 < 1.6 Ba 140 < 18.6 < 31.1 < 19.4 < 15.2 < 28.3 < 23.2 La 1 40 <5.4 <4.7 <6.0 <6.6 <4.2 <2.9 Ce 144 < 28.5 < 34.1 < 28.4 <29.4 < 32.2 < 21.8

-- page 96 of 122 --

CL-90 SURFACE WATER ACTIVITY (pciII)

Date 28 Jan 04 25 Feb 04 31 Mar 04 28 Apr 04 26 May 04 30 Jun 04 Collected 131 <0.3 <0.3 <0.2 <0.3 <0.8 <0.3 Be" < 45.7 < 23.6 < 51.1 < 21.3 < 30.4 <45.0 K'0 < 105.1 < 55.1 < 96.8 < 61.5 < 70.2 <96.4 Mn"4 <7.0 < 1.8 <4.8 <2.5 <2.0 <3.2 Fess <6.2 <3.3 <5.6 <3.0 <6.5 <6.8 Coss <4.5 <3.7 <4.8 <2.2 <2.0 <5.6 Co'° <4.4 <2.9 <5.0 <3.3 <3.6 <5.4 Zn'5 <3.5 < 3.1 <6.7 <2.5 <3.3 <3.2 Zr'" < 11.4 <6.5 <6.4 < 5.1 <9.0 <6.9 Nb"5 <6.4 <2.1 <2.8 < 3.1 <3.0 <5.0 Cs" <4.7 <3.5 <6.4 <3.0 < 3.1 <2.5 Cs 13 T <3.6 < 1.9 <4.7 < 2.1 <3.4 <4.3 Ba140 < 13.7 < 10.5 < 18.2 < 11.5 < 11.8 < 29.6 La"1 <6.0 < 1.4 <4.3 < 1.6 <3.6 <6.7 Ce"' < 30.1 < 32.3 < 38.1 < 21.7 < 34.9 < 44.7 Date 28 Jul 04 25 Aug 04 28 Sep 04 27 Oct 04 23 Nov 04 29 Dec 04 Collected 1131 <0.4 <0.3 < 0.4 <0.3 <0.3 <0.3 Be" < 47.6 < 54.4 < 55.5 < 55.8 < 32.2 < 66.0 K4° < 105.6 <143.0 < 97.3 < 97.7 < 68.3 < 118.5 Mn5 <4.7 <4.6 <4.4 <4.9 <3.3 < 7.1 Fe" <8.3 <9.2 < 11.4 <7.6 <4.1 <5.6 Cosa <3.4 <5.5 <4.6 <2.3 <2.6 <3.4 Cosa <4.6 <6.2 <2.4 <4.8 <2.2 <4.3 Zn"s <5.9 <9.0 <5.7 < 7.0 <4.5 < 8.0 Zr"5 < 10.4 <8.0 <7.4 <7.6 <7.5 < 10.0 Nb"s <4.2 <3.9 <5.4 <4.7 < 5.1 < 3.1 Cs"' <5.5 <4.6 <4.0 <6.9 <2.5 <5.3 Cs" 7 <5.0 <4.1 <4.8 <6.8 <2.2 <5.3 Ba"' < 21.2 <24.8 < 11.5 < 14.7 < 13.8 < 30.3 La"' <5.0 < 5.1 <5.4 <8.5 < 3.9 <5.2 Ce'44 < 40.4 < 43.0 <52.4 < 50.2 < 22.8 <48.6

• .page 97 of 122 --

CL-91 SURFACE WATER ACTIVITY (pClIl)

Date 28 Jan 04 25 Feb 04 31 Mar 04 28 Apr 04 26 May 04 30 Jun 04 Collected Be" < 20.3 < 17.0 < 29.9 < 32.8 < 32.1 < 52.5 K40 < 60.3 < 54.4 < 72.9 <101.8 < 61.9 < 88.6 Mns4 <3.0 <2.1 <4.5 <3.5 <3.7 <4.6 Fess <5.2 <4.5 <3.9 <7.3 <4.1 <7.9 Co$' < 2.1 <2.0 <2.4 <3.8 < 1.7 <3.9 Co'° <3.2 <2.6 <2.4 <5.6 < 1.7 <5.5 Znes <2.9 < 3.1 <4.1 <4.9 <3.6 < 5.1 Zr" <5.2 <4.2 <9.7 <9.2 <7.0 <9.5 Nb"5 <2.3 < 1.9 <6.0 <4.6 <4.5 < 6.1 Cs"' <3.0 <3.0 <2.8 <6.0 <2.5 <4.2 Cs 137 <4.0 <2.0 <3.9 <6.8 <4.6 <4.2 BaI40 <8.9 <9.8 <26.4 < 21.1 <23.7 < 42.1 1

La 40 < 1.5 < 2.1 <6.5 < 5.1 <6.7 <4.9 Ce 1

44 < 28.9 < 28.1 < 37.7 < 49.7 < 24.0 < 42.1 Date 28 Jul 04 25 Aug 04 28 Sep 04 27 Oct 04 23 Nov 04 29 Dec 04 Collected Be" < 52.2 < 70.2 < 15.7 < 31.3 <56.9 < 32.2 K40 <91.5 < 99.1 <61.8 <63.4 <110.5 < 76.8 Mn54 <2.9 <5.4 <3.3 <2.0 <3.2 < 1.7 Fe"s < 12.6 <9.3 <7.9 <7.2 <4.7 <4.4 Cos$ <5.8 <3.2 < 2.1 < 3.1 <4.6 <2.5 Co'° <4.4 <6.2 <3.3 <2.3 <6.6 <2.4 Zn"s <4.3 <7.7 <4.2 <3.8 <6.5 <5.9 Zr"S < 15.8 < 12.8 <6.6 <5.4 <8.3 < 7.1 Nb"s <7.5 <3.9 <2.7 < 2.1 <4.9 <4.6

< 5.1 <6.0 <3.6 < 1.8 < 5.1 <2.9 Cs"'

<4.7 <5.0 <4.0 <2.2 <5.8 <2.7 1

Ba 40 <4.3 < 11.8 < 19.9 < 20.5 <29.7 < 14.6 La 140 < 10.7 <3.9 <3.5 <5.3 <9.7 < 1.9 Ce 1

44 < 58.1 < 47.8 < 30.4 < 19.9 <54.0 < 47.4

-- page 98 of 122 --

CL-99 SURFACE WATER ACTIVITY (pCI/I)

Date 28 Jan 04 25 Feb 04 31 Mar 04 28 Apr 04 26 May 04 30 Jun 04 Collected Be" <53.4 < 30.9 < 40.3 < 18.6 < 26.6 < 65.2 K40 < 75.9 < 50.4 < 72.2 <62.4 < 59.6 < 116.1 Mn 54 <3.9 < 1.6 *<2.0 <2.9 <4.1 <6.2 9

Fe' <3.8 <3.6 <7.7 <3.4 <3.8 < 11.5 Cos <2.6 < 1.9 <3.6 <2.8 <2.5 <4.0 Cosa <3.8 <2.5 <2.2 <3.6 <2.2 < 5.1 Zn6 s < 7.1 < 1.8 <3.3 <4.6 <2.7 <9.5 Zr'5 <8.3 <4.4 <3.9 <6.2 <4.0 < 13.2 Nb"s <4.0 <2.4 <2.2 < 1.7 <2.5 <6.4 Cs' 3 ' <4.6 <2.9 <3.3 <3.5 <3.0 <5.0 Cs' 3 ' <6.0 <2.6 <3.5 <2.5 <2.9 <4.5 Ba"40 < 16.7 < 16.2 < 10.5 < 15.0 <8.3 < 54.7 La'40 <3.4 <2.4 <3.0 <2.2 <2.8 <6.3 Ce'44 < 28.1 < 14.4 < 35.7 < 27.2 < 20.7 < 50.8 Date 28 Jul 04 25 Aug 04 28 Sep 04 27 Oct 04 23 Nov 04 29 Dec 04 Collected Be7 < 31.0 < 52.6 < 44.4 < 27.8 < 34.4 < 36.2 K40 < 99.0 <111.2 < 64.5 <48.8 <113.3 < 56.9 Mn"4 <3.8 <3.3 <3.5 <2.5 <4.0 <2.3 Fe" <9.0 <5.7 < 6.1 <4.8 <3.7 <2.4 Coss < 1.8

<3.4 <4.6 <2.7 <6.0 < 1.7 Co'° <4.9 <4.8 <3.3 <2.3 <5.6 <2.5 Zn65 <7.2 <4.3 <3.6 <4.7 <7.6 < 1.6 Zr"5 <6.4 <6.3 <4.5 < 2.1 < 14.0 <6.0 Nb'5 <3.9 <3.2 <3.6 <2.7 <6.8 <4.3 Cs'3 ' < 5.8 <4.0 <4.1 <2.7 <6.8 <2.5 Cs'3 <5.0 <5.4 <3.7 <2.9 <3.9 <3.5 Ba140 <4.8 < 26.8 < 23.6 < 19.3 < 31.6 < 15.8 La140 < 9.1 <5.4 <4.3 < 1.8 <6.6 <4.2 Ce'44 < 38.4 < 36.1 <35.7 < 20.6 <54.5 <33.7

-- page 99 of 122 --

SURFACE WATER and DRINKING WATER QUARTERLY TRITIUM COMPOSITE (pCIII)

Quarter CI-13 CI-14 CI-90 CI-91 CI-99 152

<<st 279 < 152 < 152 < 152 2nd < 158 < 158 < 158 < 158 < 158 3rd < 158 < 158 < 158 < 158 < 158 4th < 141 < 141 < 141 < 141 < 141 CL-7D WELL WATER ACTIVITY (pCIII)

Date 31 Mar 04 30 Jun 04 28 Sep 04 29 Dec 04 Collected H3 < 162 < 163 < 163 < 161 Be7 < 39.9 <54.0 < 17.8 <48.8 K40 < 109.5 < 108.4 < 46.1 < 111.4 Mn54 <3.7 <4.5 < 2.1 <4.7 Fes" < 11.5 <7.8 <6.4 <6.5 Cost

<4.3 <4.4 <3.4 <5.5 Co'° <4.6 <5.4 <2.2 <5.4 Zn'5 <8.0 <7.3 <2.7 <8.6 Nb95 <4.3 <3.5 <2.9 <6.0 Zr"s < 10.7 <8.4 <5.8 < 10.0 Cs"' <3.9 <5.6 <2.7 < 5.1 Cs137 <5.7 <7.7 <2.2 <3.9 Ba 140 < 20.9 < 29.2 < 26.9 < 23.7 La 140 <4.2 <6.8 <6.2 <8.6 Ce144 < 46.8 < 39.4 < 24.6 < 38.7

-- page 100 of 122 --

CL-12 UNTREATED WELL WATER ACTIVITY (pCIII)

Date 31 Mar 04 30 Jun 04 28 Sep 04 29 Dec 04 Collected H3 < 162 < 163 < 163 < 161 Be' < 36.1 < 24.5 < 33.8 < 36.9 K'0 < 71.6 < 59.0 < 34.6 < 56.8 Mn54 <3.5 <3.0 <2.7 < 1.8 Fes" <2.0 <4.8 <8.3 <4.5 Cosa <3.3 <2.6 < 1.8 <2.6 Co'O <2.4 <2.4 <2.4 < 1.7 Zn"s < 3.1 <3.3 <4.3 <2.9 Nb9s <2.5 <3.2 <3.8 <3.8 ZrV <4.8 <7.2 <6.8 < 5.1 Cs"4 <4.6 <2.0 <2.5 <2.4 Cs' 37 <3.6 <2.7 <2.2 < 1.9 Ba'40 <21.3 < 21.3 < 35.1 < 16.2 La'40 <3.4 <5.8 <7.3 <3.8 Ce 144 < 23.0 < 25.2 < 32.7 < 24.4 CL-12 TREATED WELL WATER ACTIVITY (pciII)

Date 31 Mar 04 30 Jun 04 28 Sep 04 29 Dec 04 Collected H3 < 162 < 163 < 163 < 161 Be" < 35.8 < 34.0 < 26.7 < 27.1 K40 < 81.4 < 63.6 < 74.0 <76.4 Mn"4 <4.9 <2.6 <3.3 < 1.6 Fes" <6.9 <5.7 < 5.1 <9.3 Coss

<5.7 <2.8 <3.0 <3.2 Co'° <2.4 <4.9 < 1.4 <2.4 Zn" <4.1 < 5.4 <2.3 <7.2 Nb"s <6.0 <2.8 <4.3 <4.5 Zr"5 < 13.5 <5.9 <4.7 <3.5 Cs"' <3.3 < 3.8 <2.9 < 1.8 Cs" 7 <4.3 < 3.4 <3.0 <3.7 Ba 140 < 26.6 < 30.8 <30.2 < 17.7 La140 <8.5 <4.4 < 5.1 <4.3 Ce 144 < 33.3 < 25.5 < 36.9 < 28.5

-- page 101 of 122 --

CL-14 DRINKING WATER ACTIVITY (pCIII)

Date 30 Jun 04 28 Jan 04 25 Feb 04 31 Mar 04 28 Apr 04 26 May 04 Collected Gross Beta 2.0 +/- 0.7 1.8 +/- 0.6 1.7 +/- 0.5 2.5 +/- 0.6 1.3 +/- 0.5 1.0 +/- 0.4 Be 7 <3.9 < 34.7 < 26.2 < 45.0 < 27.7 < 58.2 K40 < 113.6 < 70.2 < 60.6 <104.6 < 98.9 < 86.9 Mn"4 <3.6 < 3.1 <2.5 <4.7 <2.9 <2.4 Fe"' <4.4 <3.7 <5.6 <5.6 <7.9 <7.3 Coss <3.3 <2.6 <2.8 <4.4 <5.7 <4.0 Co'° <4.3 < 1.9 <2.5 <5.2 <3.9 <4.4 Zn65 <7.7 <2.8 <2.6 <6.0 <7.6 <3.9 Zr" <9.6 <7.8 <6.9 < 11.5 <8.6 < 10.9 Nbs <3.2 <3.2 <4.2 <4.7 <3.9 <4.7 Cs134 <5.3 <2.6 <4.4 <4.3 <3.0 <3.8 Cs 1 " <5.8 <3.8 <3.5 <5.8 <4.4 <4.4 Ba 140 < 15.3 < 14.8 < 18.0 < 22.8 < 18.1 < 41.6 La 1 40 <4.8 < 3.1 <2.9 <6.3 <6.7 < 5.1 Ce 144 < 35.1 < 35.5 < 32.5 <46.4 < 49.5 < 45.9 Date 28 Sep 04 27 Oct 04 23 Nov 04 29 Dec 04 28 Jul 04 25 Aug 04 Collected Gross Beta 0.9 +/- 0.4 <0.9 1.1 +/- 0.5 <0.8 <0.9 1.3 +/- 0.6 Be" <50.5 < 52.7 < 42.2 < 30.0 < 25.4 < 25.5 K40 < 77.1 < 101.7 < 69.5 < 58.2 < 48.0 < 91.9 Mn"4 <4.5 <2.8 < 2.1 < 3.1 <3.0 < 2.1 Fe"9 < 10.5 <5.6 <6.2 <8.2 <3.9 <4.4 Cos$

< 1.7 <4.4 < 1.7 < 1.8 <2.7 < 2.1 Co06 <5.3 <5.2 <2.5 <3.9 <2.5 <2.5 Zn" <4.1 <8.9 <4.5 <4.3 <3.7 <5.9 Zr" <8.0 < 10.6 <3.9 <4.8 <6.7 <4.5 Nb"s <2.2 <4.8 <3.2 <3.2 <3.7 <3.0 Cs13734 <5.2 <4.7 <2.6 <2.5 <3.7 <4.0 Cs'

- <3.7 <6.9 < 4.1 <2.6 <4.2 <3.9 Ba'40 <2.9 < 19.7 < 23.9 < 15.4 < 17.2 < 15.9 La 1 40 <4.6 <8.2 <6.3 <5.9 <2.3 < 2.1 Ce 144 < 33.2 < 54.6 < 27.7 < 20.1 < 25.5 < 29.8

- page 102 of 122 -

CL-116 MILK ACTIVITY - (Control)

(pCIII)

Date 28 Jan 04 25 Feb 04 31 Mar 04 28 Apr 04 12 May 04 Collected "131 <0.3 <0.3 <0.3 <0.3 <0.3 Be? < 39.8 < 39.8 < 37.9 < 41.6 <50.9 K40 1303+/- 115 1246+/- 109 1273 +/- 166 1224+/- 115 1166+/- 165 Mn54 <4.5 < 2.1 <4.5 <5.3 <3.3 Fe" <4.1 <5.4 < 12.2 <6.5 <9.3 Co0t

<2.3 <3.3 <5.3 <2.6 <7.4 CoG° <3.8 <3.4 <5.3 <3.5 <7.8 Znss <7.5 <7.3 <6.8 <4.9 < 18.0 Zr"5 <8.4 <9.8 <8.3 <7.8 < 13.0 Nb' 5 <3.6 <2.4 <4.9 <3.8 <5.3 Cs 134 <4.1 <3.9 <6.2 <3.6 <7.4 1 37 Cs <2.9 <4.3 < 5.1 <5.5 <4.3 Ba14 O < 13.6 < 16.2 <29.4 <23.4 < 23.5 La1 40 <2.4 <2.4 <2.6 < 3.1 < 5.1 Ce'44 <33.9 < 35.8 < 53.3 <48.2 < 60.3 Date 09 Jun 04 23 Jun 04 07 Jul 04 21 Jul 04 26 May 04 Collected 131 <0.3 <0.4 <0.4 <0.4 <0.4 Be" <47.1 < 44.9 < 53.1 < 50.0 <48.9 K"° 1207 +/- 164 1238+/- 112 1225 +/- 167 1138 +/- 158 1219+/- 176 Mn"4 <4.3 <3.9 < 5.1 < 6.1 < 3.1 Feso <9.7 <7.8 < 13.9 < 10.3 <8.8 Con < 3.1 < 1.6 < 5.1 <6.6 <4.9 CoGO <6.6 <3.2 <5.6 <5.4 <6.5 Zn'5 <5.8 <6.7 < 11.5 < 11.0 < 10.1 Zr'" <7.9 <7.2 < 12.5 < 14.3 < 12.9 Nb" <6.2 <3.8 <6.2 < 3.1 <4.9 Cs' 3 ' <6.0 <4.0 < 6.1 <6.2 <6.7 Cs137 <6.2 <4.2 <6.4 < 5.1 <6.9 Ba1 40 < 19.7 < 11.7 <22.8 <2.9 < 3.1 La 140 <6.5 <5.0 <3.6 <3.6 <3.0 Ce'" < 36.7 < 41.0 < 48.1 < 51.2 < 37.1

-- page 103 of 122 --

CL-116 MILK ACTIVITY - (Control) (continued)

Date 04 Aug 04 18 Aug 04 01 Sep 04 16 Sep 04 29 Sep 04 Collected 1131 <0.3 <0.4 <0.4 <0.4 <0.3 Be' < 32.3 <49.7 < 28.3 < 33.5 < 16.9 K4' 1149+/- 169 1270+/- 171 1562+/- 191 1164 +/- 191 1308 +/- 97 Mn' 4 <4.6 <3.7 <6.0 <4.1 <3.6 Fes" < 14.3 <8.8 < 12.1 < 10.2 <5.8 CoU <6.3 <5.0 <6.0 <6.5 <2.7 Cos° <6.0 <5.4 <7.8 <5.7 <3.8 Zn'0 < 13.3 <7.0 <9.9 < 12.6 <5.6 Zr'5 <6.5 <6.8 < 12.5 < 12.2 <3.2 Nb' 5 <6.2 < 3.1 <4.4 <4.1 <4.4 Cs134 <6.2 <3.6 < 7.1 <6.4 <2.7 Cs" 7 <5.0 <6.7 <5.8 <4.9 <3.8 Ba140 < 30.8 < 15.5 < 22.8 < 17.9 < 13.7 1

La 40 <3.8 <3.2 <4.0 <7.0 < 1.5 144 Ce <41.3 < 48.4 < 40.7 <33.4 < 35.5 Date 13 Oct 04 27 Oct 04 23 Nov 04 29 Dec 04 Collected 1131 <0.4 <0.3 <0.3 <0.4 Be" < 52.0 < 47.3 < 20.8 < 41.8 4

K 0 1314 +/- 162 1351 +/- 197 1306+/- 119 1336 +/- 175 Mn"4 <2.3 <4.3 <3.2 <5.6 Fe"o <9.9 < 13.9 <8.4 < 11.1 Coss <7.5 <3.0 <3.5 <5.4 Co'° <5.3 <6.8 < 1.4 <6.0 Zn"s < 11.6 <7.8 <8.0 <6.9 Zrs < 10.5 <6.4 < 10.9 < 13.6 Nbs <7.2 <7.8 <5.3 <7.0 Cs134 <7.4 <8.7 <3.5 <4.5 Cs137 <6.6 <6.8 <4.4 <7.5 Ba'40 < 31.6 < 15.7 < 19.2 < 20.3 La140 <5.4 < 12.1 < 1.8 <8.5 Ce' 44 < 59.6 < 59.3 < 46.8 <48.4

-- page 104 of 122 -

CL-1 GRASS ACTIVITY (pCilg wet)

Date 12 May 04 26 May 04 09 Jun 04 23 Jun 04 07 Jul 04 Collected Be7 0.88 i 0.20 0.93 +/- 0.18 1.18+/- 0.19 1.79 +/- 0.30 3.08 +/- 0.51 K40 5.30 +/- 0.47 4.47 +/- 0.49 5.49 +/- 0.40 4.21 +/- 0.53 4.70 +/- 0.77 Mns4 < 0.015 < 0.013 < 0.011 < 0.017 < 0.019 Fe'9 < 0.034 < 0.040 < 0.026 < 0.027 < 0.059 Cos < 0.014 < 0.009 < 0.011 < 0.015 < 0.017 Co'° < 0.018 < 0.012 < 0.012 < 0.023 < 0.030 Zn" < 0.029 < 0.035 < 0.033 < 0.037 < 0.030 Nb"s < 0.020 < 0.014 < 0.010 < 0.012 < 0.020 Zr"s < 0.041 < 0.017 < 0.021 < 0.039 < 0.065 1131 < 0.047 < 0.020 < 0.030 < 0.026 < 0.044 Cs"4'37

< 0.015 < 0.016 < 0.010 < 0.011 < 0.025 Cs1

< 0.012 < 0.014 < 0.017 < 0.014 < 0.037 BaU4 ' < 0.068 < 0.067 < 0.042 < 0.073 < 0.145 La140 < 0.013 < 0.015 < 0.020 < 0.010 < 0.027 Ce 144 < 0.134 < 0.114 < 0.088 < 0.147 < 0.138 Date 21 Jul 04 04 Aug 04 18 Aug 04 01 Sep 04 15 Sep 04 Collected Be7 1.33 +/- 0.28 0.95 +/- 0.21 1.26 +/- 0.30 3.60 +/- 0.38 1.23 +/- 0.17 K40 3.55 +/- 0.60 3.72 +/- 0.33 3.69 +/- 0.58 5.04 +/- 0.52 7.36 +/- 0.40 Mn"4 < 0.022 < 0.012 < 0.021 < 0.016 < 0.018 Fes" < 0.039 < 0.016 < 0.025 < 0.041 < 0.030 Cos" < 0.019 < 0.008 < 0.014 < 0.010 < 0.008 Co'° < 0.019 < 0.007 < 0.028 < 0.017 < 0.020 Zn's < 0.021 < 0.017 < 0.019 < 0.039 < 0.018 Nb"s < 0.013 < 0.010 < 0.011 < 0.012 < 0.014 Zr"s < 0.045 < 0.026 < 0.032 < 0.023 < 0.020 1131 < 0.032 < 0.016 < 0.040 <0.040 < 0.022 Cs134 < 0.018 < 0.009 < 0.025 < 0.016 < 0.015 13 7 Cs < 0.018 < 0.012 < 0.030 < 0.019 < 0.016 1

Ba 40 < 0.108 < 0.066 < 0.018 < 0.093 < 0.055 La 140 < 0.011 < 0.012 < 0.018 < 0.024 < 0.007 Ce'44 < 0.102 < 0.114 < 0.223 < 0.147 < 0.085

-- page 105 of 122 --

CL-I GRASS ACTIVITY (continued)

Date 29 Sep 04 13 Oct 04 27 Oct 04 Collected Be" 2.59 +/- 0.26 1.90 +/- 0.32 2.42 +/- 0.39 K' 0 6.44 +/- 0.52 3.18 +/- 0.49 2.99 +/- 0.47 Mn54 < 0.014 < 0.014 < 0.021 Fe'9 < 0.040 < 0.043 < 0.027 Cos$ < 0.013 < 0.013 < 0.020 Cos0 < 0.017 < 0.019 < 0.022 Zn55 < 0.022 < 0.024 < 0.050 Nb' 5 < 0.014 < 0.013 < 0.012 Zr'5 < 0.019 < 0.015 < 0.044 1131

< 0.027 < 0.029 < 0.047 13 Cs 4 < 0.011 < 0.016 < 0.024 cS137 < 0.017 < 0.017 < 0.022 Ba140 < 0.046 < 0.082 < 0.095 La140 < 0.015 < 0.024 < 0.015 Ce 1 44 < 0.136 < 0.086 < 0.175

-- page 106 of 122 --

CL-2 GRASS ACTIVITY (pCllg wet)

Date 12 May 04 26 May 04 i09 Jun 04 23 Jun 04 07 Jul 04 Collected Be7 0.86 i 0.24 3.23 +/- 0.20 0.98 +/- 0.19 1.89 +/- 0.28 0.85 +/- 0.24 K40 7.08 +/- 0.73 6.81 +/- 0.37 6.01 +/- 0.52 6.69 +/- 0.51 4.99 +/- 0.63 Mn' 4 < 0.008 < 0.011 <0.017 < 0.011 <0.012 Fe5 ' < 0.036 < 0.022 < 0.038 <0.040 < 0.055 Co5' <0.012 < 0.008 < 0.015 <0.013 < 0.021 Co'° < 0.017 <0.012 <0.016 <0.012 <0.019 Zn"s < 0.037 < 0.027 < 0.025 < 0.027 < 0.040 Nb"5 < 0.020 <0.014 < 0.014 <0.012 < 0.010 Zr"s < 0.034 < 0.024 < 0.025 < 0.039 < 0.047 11 31

<0.041 <0.019 < 0.020 <0.018 < 0.026 cs 1 3 4 <0.017 <0.014 < 0.021 < 0.020 < 0.027 Cs137 < 0.024 < 0.014 <0.019 < 0.015 < 0.020 Ba'14 < 0.079 < 0.034 < 0.085 < 0.058 < 0.072 La"' < 0.026 < 0.009 < 0.010 <0.019 < 0.011 Ce"14 < 0.129 < 0.083 <0.100 < 0.091 < 0.102 Date 15 Sep 04 21 Jul 04 04 Aug 04 18 Aug 04 01 Sep 04 Collected Be7 1.43 +/- 0.36 1.52 +/- 0.24 1.66 +/- 0.27 5.18 +/- 0.42 2.53 +/- 0.22 K'° 6.68 +/- 0.75 4.74 +/- 0.45 6.64 +/- 0.57 9.26 +/- 0.66 6.53 +/- 0.39 Mn" <0.017 <0.012 <0.014 <0.013 <0.010 Fe" < 0.068 <0.018 < 0.041 < 0.030 < 0.023 Co5' < 0.018 < 0.009 < 0.009 < 0.014 < 0.014 Co'° < 0.025 <0.012 < 0.013 < 0.020 < 0.015 Zn"s < 0.050 < 0.022 < 0.029 < 0.027 < 0.022 Nb"' < 0.029 <0.010 <0.015 <0.012 <0.011 Zr9" < 0.037 < 0.032 < 0.023 < 0.022 < 0.031 1131

< 0.034 < 0.027 < 0.034 < 0.037 <0.019 cS134

< 0.032 <0.016 <0.015 < 0.023 <0.011 cS137 < 0.026 <0.011 <0.016 < 0.021 < 0.014 Ba"° < 0.097 < 0.049 < 0.089 < 0.034 < 0.060 La"14 < 0.028 <0.015 < 0.017 < 0.024 <0.010 Ce"' < 0.125 < 0.149 <0.134 < 0.189 <0.130

-- page 107 of 122 --

CL-2 GRASS ACTIVITY (continued)

Date 29 Sep 04 13 Oct 04 27 Oct 04 Collected Be' 2.63 i 0.29 2.66 i 0.25 3.19 +/- 0.38 K40 6.77 i 0.54 5.92 +/- 0.45 2.94 +/- 0.52 Mn" <0.013 < 0.012 < 0.022 Fe"o < 0.035 < 0.030 < 0.030 Coss < 0.013 <0.013 < 0.020 Co'0 < 0.017 < 0.009 < 0.018 Zn"5 < 0.021 < 0.030 < 0.029 Nb's < 0.017 <0.012 < 0.009 Zr' 5 < 0.035 <0.017 < 0.039 1131

< 0.029 < 0.023 < 0.029 Cs'3 ' < 0.018 <0.015 < 0.021 Cs'" < 0.016 <0.013 < 0.019 Ba140 < 0.070 < 0.037 < 0.087 La140 < 0.007 < 0.016 < 0.021 Ce"'4 < 0.122 < 0.079 < 0.149

-- page 108 of 122 --

CL-8 GRASS ACTIVITY (pCI/g wet)

Date 09 Jun 04 23 Jun 04 07 Jul 04 12 May 04 26 May 04 Collected Be" 1.08 +/- 0.22 2.42 +/- 0.21 1.33 +/- 0.23 3.15 +/- 0.33 1.70 +/- 0.37 K4° 6.97 +/- 0.54 6.26 +/- 0.36 11.15+/- 0.64 7.68 +/- 0.54 6.02 +/- 0.73 Mn 5 4 < 0.016 < 0.009 < 0.020 <0.012 <0.016 Fes9 < 0.040 < 0.020 < 0.048 < 0.047 < 0.069 Co" < 0.012 < 0.010 <0.013 <0.012 < 0.026 CoGO < 0.010 < 0.012 <0.016 <0.011 < 0.026 Zn"s < 0.019 < 0.012 < 0.043 < 0.030 < 0.076 Nb"9 < 0.013 < 0.012 < 0.020 < 0.014 < 0.009 Zr"5 < 0.029 < 0.021 < 0.032 < 0.035 < 0.056 1131 < 0.033 < 0.016 <0.019 < 0.025 < 0.036 Cs 134 < 0.014 < 0.010 < 0.024 <0.017 <0.018 13 Cs ' < 0.016 < 0.013 < 0.022 <0.010 <0.016 Ba 401

< 0.053 < 0.047 < 0.094 < 0.089 <0.106 La 140 <0.013 < 0.010 <0.016 <0.015 <0.015 Ce1 4 4 < 0.135 < .0096 < 0.163 < 0.081 < 0.119 Date 18 Aug 04 01 Sep 04 15 Sep 04 21 Jul 04 04 Aug 04 Collected Be' 0.74 +/- 0.23 1.41 +/- 0.24 1.61 +/- 0.36 244 +/- 0.33 0.94+/- 0.15 K40 6.86 +/- 0.65 5.85 +/- 0.49 8.08 +/- 0.84 4.98 +/- 0.59 7.32 +/- 0.32 Mn"4 < 0.012 < 0.012 < 0.028 < 0.007 < 0.009 Fe" < 0.048 < 0.035 < 0.057 < 0.045 < 0.024 Co" <0.016 < 0.012 < 0.012 <0.014 < 0.005 Co'° < 0.023 < 0.011 < 0.030 <0.015 <0.010 Znfs < 0.029 < 0.011 < 0.034 < 0.039 < 0.020 Nb"s <0.016 < 0.008 < 0.029 < 0.020 < 0.011 Zr9" < 0.033 < 0.020 < 0.065 < 0.028 < 0.011 1131 < 0.019 < 0.022 < 0.038 <0.017 <0.010 Cs 134 < 0.020 < 0.014 < 0.031 <0.013 < 0.008 Cs 13

' < 0.020 <0.012 < 0.023 <0.011 <0.013 Ba140 < 0.103 < 0.068 < 0.079 < 0.080 < 0.032 La140 < 0.013 < 0.011 < 0.044 < 0.027 < 0.008 Ce 144 < 0.097 < 0.118 < 0.175 < 0.092 < 0.073

-- page 109 of 122 --

CL-8 GRASS ACTIVITY (continued)

Date 29 Sep 04 13 Oct 04 27 Oct 04 Collected Be" 0.54 +/- 0.18 3.91 +/- 0.40 1.26 +/- 0.26 K'4 7.10 +/- 0.58 8.11 +/- 0.68 4.36 +/- 0.56 Mn54 < 0.014 < 0.019 < 0.018 Fe" < 0.032 < 0.033 < 0.038 cose

< 0.014 < 0.020 < 0.019 Co"6 <0.019 < 0.021 < 0.011 Zn' < 0.030 <0.033 < 0.043 Nb" <0.019 < 0.020 <0.013 Zr'5 < 0.036 < 0.043 < 0.031 1131 < 0.030 < 0.045 < 0.036

< 0.009 < 0.030 < 0.024 Cs 137

< 0.014 < 0.026 <0.012 Ba 140 < 0.066 < 0.042 < 0.084 La'40 < 0.010 < 0.021 < 0.020 Ce1 4 ' < 0.175 < 0.168 < 0.113

-- page 110 of122--

CL-116 GRASS ACTIVITY (Control)

(pCI/g wet)

Date 12 May 04 26 May 04 09 Jun 04 23 Jun 04 07 Jul 04 Collected Be7 0.60i 0.16 0.94 +/- 0.16 3.35 +/- 0.36 2.43 +/- 0.27 2.85 +/- 0.35 K'° 5.09 i 0.44 4.28 +/- 0.35 17.19 +/- 0.88 5.99 +/- 0.55 5.79 +/- 0.54 Mn54 <0.015 < 0.009 < 0.019 < 0.011 < 0.012 Fe59 < 0.015 < 0.012 < 0.055 < 0.044 < 0.041 Co"s < 0.009 <0.012 < 0.016 < 0.013 < 0.016 Co"6 < 0.008 <0.015 < 0.017 < 0.016 < 0.014 Zn"s < 0.022 < 0.030 < 0.036 < 0.034 < 0.033 Nb"s < 0.011 < 0.005 < 0.029 < 0.020 < 0.017 Zr'5 < 0.023 <0.017 < 0.031 < 0.044 < 0.023 1131 < 0.025 <0.017 < 0.034 < 0.020 < 0.032 Cs"' < 0.009 <0.012 < 0.023 < 0.019 < 0.017 Csu? < 0.014 < 0.014 < 0.030 < 0.015 < 0.016 Ba140 < 0.055 < 0.049 < 0.113 < 0.062 < 0.063 La 140 < 0.008 < 0.009 < 0.016 < 0.014 < 0.011 Ce'44 < 0.081 < 0.076 < 0.126 < 0.078 < 0.087 Date 21 Jul 04 04 Aug 04 18 Aug 04 01 Sep 04 15 Sep 04 Collected Be7 1.93 +/- 0.39 2.42 +/- 0.26 2.80 +/- 0.39 2.43 +/- 0.30 0.71 +/- 0.20 K40 5.97 +/- 0.74 3.93 +/- 0.41 4.04 +/- 0.61 5.24 +/- 0.61 6.54 +/- 0.60 Mn"4 < 0.022 < 0.009 < 0.019 < 0.014 <0.019 Fes" < 0.038 < 0.029 < 0.047 < 0.038 < 0.039 Co" < 0.017 <0.013 < 0.014 < 0.015 <0.018 Co'° < 0.023 <0.010 < 0.027 < 0.014 <0.018 Zn"5 < 0.063 < 0.029 < 0.023 < 0.036 < 0.020 Nb"s < 0.011 < 0.013 < 0.015* < 0.019 <0.019 Zr"5 < 0.061 < 0.027 < 0.033 < 0.021 < 0.037 1131 < 0.032 < 0.024 < 0.029 < 0.028 < 0.025 Cs"4' < 0.022 < 0.009 < 0.022 < 0.011 < 0.028 Cs" 7 < 0.016 <0.013 < 0.018 < 0.013 < 0.026 Ba 1 40 < 0.107 < 0.035 < 0.085 < 0.091 < 0.062 La 140 <0.017 < 0.014 < 0.016 <0.013 <0.017 Ce'44 < 0.127 < 0.078 < 0.129 <0.107 < 0.083

-- page 111 of 122 --

CL-116 GRASS ACTIVITY (Control) (continued)

Date 29 Sep 04 13 Oct 04 27 Oct 04 Collected Be" 1.77 i 0.21 2.09 +/- 0.28 2.70 +/- 0.24 K4° 7.39 +/- 0.47 4.96 +/- 0.43 1.68 +/- 0.31 5

Mn 4 < 0.017 <0.017 <0.010 Fe5" < 0.029 < 0.024 < 0.031 Co5' < 0.013 < 0.007 <0.010 cow

<0.017 <0.013 < 0.009 Zn'5 < 0.037 < 0.036 < 0.021 Nb"s <0.017 <0.016 < 0.012 Zr"5 < 0.033 <0.016 < 0.014 1131 < 0.028 < 0.022 < 0.023 Cs"' <0.018 < 0.018 < 0.008 Cs"7 <0.019 <0.013 <0.012 Ba140 < 0.049 < 0.093 < 0.054 La140 < 0.022 < 0.008 < 0.007 Ce14' < 0.115 <0.154 < 0.090

-- page 112 of 122 -

CL-114 GREEN LEAFY VEGETABLE ACTIVITY (Control)

(pCI/g wet)

Date 30 Jun 04 30 Jun 04 30 Jun 04 28 Jul 04 28 Jul 04 Collected Sample Type Lettuce Cabbage Swiss Chard Cabbage Swiss Chard Gross Beta 3.38 + 0.07 4.70+/- 0.13 4.91 +/- 0.10 2.72 +/- 0.06 4.69 +/- 0.10 Be7 < 0.17 < 0.16 < 0.17 < 0.18 < 0.19 K40 4.03+/- 0.48 3.80 i 0.47 3.30 +/- 0.52 3.12 +/- 0.53 3.61 +/- 0.62 Mn54 <0.013 < 0.014 <0.010 < 0.008 < 0.017 Fe" < 0.029 < 0.030 < 0.039 < 0.033 < 0.035 Cosa < 0.019 <0.011 < 0.015 < 0.017 <0.017 CoS° < 0.018 <0.015 < 0.020 < 0.018 <0.019 Zn65 < 0.029 <0.019 < 0.034 < 0.039 < 0.042 Nbs <0.010 < 0.016 < 0.020 < 0.014 < 0.027 Zr"5 < 0.023 < 0.019 < 0.042 < 0.036 < 0.044 i1131 < 0.030 < 0.028 < 0.016 < 0.029 < 0.023 Cs"' < 0.016 < 0.012 < 0.010 <0.021 < 0.028 Cs137 <0.015 <0.013 < 0.009 < 0.024 < 0.022 Ba"' < 0.092 < 0.058 <0.103 < 0.108 < 0.071 La140 <0.015 <0.013 < 0.012 <0.016 < 0.014 Ce'44 < 0.079 < 0.072 < 0.057 < 0.093 < 0.074 Date 29 Sep 04 28 Jul 04 25 Aug 04 25 Aug 04 25 Aug 04 Collected Sample Type Lettuce Lettuce Swiss Chard Cabbage Swiss Chard Gross Beta 5.23+/- 0.10 5.22 +/- 0.11 2.95 +/- 0.06 2.31 +/- 0.04 4.38 +/- 0.10 Be 7 < 0.20 0.88 < 0.12 < 0.12 < 0.20 K'° 4.30 +/- 0.49 5.49 +/- 0.59 3.40 +/- 0.33 1.82 +/- 0.20 4.43 +/- 0.64 Mn54 < 0.024 < 0.015 < 0.009 < 0.008 < 0.016 Fe59 < 0.037 < 0.030 < 0.024 < 0.016 < 0.044 Cos"

< 0.020 <0.013 < 0.009 < 0.009 < 0.015 Co" < 0.020 < 0.018 < 0.008 <0.012 < 0.028 Zn"5 < 0.047 < 0.048 < 0.026 <0.016 < 0.025 Nb"5 < 0.014 < 0.022 < 0.011 < 0.010 < 0.020 Zr"5 < 0.032 < 0.040 < 0.020 < 0.009 < 0.029 1131 < 0.033 < 0.031 < 0.021 <0.013 < 0.022 Cs"' < 0.018 < 0.020 < 0.012 < 0.009 < 0.024 Cs"7~ < 0.021 < 0.017 < 0.011 < 0.007 <0.013 1

Ba 40 < 0.098 < 0.098 < 0.060 < 0.039 < 0.078 La'40 < 0.009 <0.010 <0.015 < 0.005 < 0.023 Ce 1 44 < 0.148 < 0.158 < 0.080 < 0.062 < 0.114

-- page 113 of 122--

CL-114 GREEN LEAFY VEGETABLE ACTIVITY (Control) (continued)

(pCi1g wet)

Date 29 Sep 04 29 Sep 04 Collected Sample Type Cabbage Morning Glory Gross Beta 2.62 i 0.05 5.63 +/- 0.12 Be7 < 0.09 < 0.23 K4° 1.82 i 0.33 5.71 +/- 0.67 Mn 54 < 0.012 < 0.014 Feso < 0.026 < 0.042 Cosa < 0.015 < 0.027 Cosa < 0.016 < 0.017 Zn"s < 0.040 < 0.029 Nb' 5 < 0.015 < 0.021 Zr' 5 < 0.031 < 0.045

< 0.022 < 0.034 Cs"4 < 0.014 < 0.025 Cs" 7 < 0.009 < 0.018 Ba140 < 0.060 < 0.075 La14 < 0.014 < 0.036 Ce 1 4 ' < 0.084 < 0.186

-- page 114 of 122 --

CL-115 GREEN LEAFY VEGETABLE ACTIVITY (pCI1g wet)

Date Collected 30 Jun 04 30 Jun 04 30 Jun 04 28 Jul 04 Sample Type Lettuce Cabbage Swiss Chard Cabbage Gross Beta 4.91 +/- 0.10 3.67 +/- 0.09 5.73+/- 0.10 5.47 +/- 0.14 Be7 < 0.19 < 0.11 < 0.12 < 0.16 K'° 4.61 +/- 0.59 3.37 +/- 0.32 5.37 +/- 0.47 4.56 +/- 0.42 Mn54 < 0.014 < 0.012 < 0.011 < 0.012 Fe' 9 < 0.021 < 0.021 < 0.034 < 0.030 Cosa < 0.016 < 0.009 < 0.019 < 0.013 Co'° < 0.017 < 0.011 < 0.009 < 0.007 Zn65 < 0.044 < 0.013 < 0.039 < 0.013 Nb's < 0.016 < 0.014 < 0.007 < 0.009 Zr'5 < 0.035 < 0.015 < 0.019 < 0.029 1131 < 0.038 < 0.022 < 0.025 < 0.029 Cs"' < 0.022 < 0.009 < 0.021 < 0.019 Cs"' < 0.012 < 0.012 < 0.014 < 0.011 Ba"14 < 0.095 < 0.051 < 0.074 < 0.041 La 14 0 < 0.021 < 0.006 < 0.007 < 0.007 Ce"4' < 0.115 < 0.076 < 0.103 < 0.072 Date Collected 28 Jul 04 28 Jul 04 25 Aug 04 25 Aug 04 Sample Type Swiss Chard Lettuce Lettuce Swiss Chard Gross Beta 9.52 +/- 0.19 8.04 +/- 0.16 4.18 +/- 0.13 7.17 +/- 0.16 Be" 0.31 +/- 0.15 0.32 +/- 0.16 3.35 +/- 0.52 0.33 +/- 0.18 K'0 7.86 +/- 0.55 5.42 +/- 0.45 4.93 +/- 0.71 6.13 +/- 0.42 Mn64 < 0.009 < 0.010 < 0.030 < 0.016 Fe59 < 0.036 < 0.028 < 0.032 < 0.018 Co5" < 0.013 < 0.014 < 0.017 < 0.009

< 0.016 < 0.016 < 0.032 < 0.012 Zn'5 < 0.020 < 0.035 < 0.064 < 0.021 Nb'5 < 0.019 < 0.021 < 0.049 < 0.009 Zr"5 < 0.038 < 0.034 < 0.086 < 0.034 1131

< 0.023 < 0.022 < 0.052 < 0.026 13 Cs 137

' < 0.017 < 0.007 < 0.027 < 0.014 Cs < 0.029 < 0.014

< 0.012 < 0.014 Ba"40 < 0.070 < 0.054 < 0.074 < 0.070 La"40 < 0.012 < 0.012 < 0.016 < 0.006 Ce 1" < 0.114 < 0.123 < 0.247 < 0.107

-- page 115 of 122 --

CL-115 GREEN LEAFY VEGETABLE ACTIVITY (continued)

(pCi1g wet)

Date Collected 25 Aug 04 29 Sep 04 29 Sep 04 29 Sep 04 Sample Type Cabbage Swiss Chard Cabbage Beans Gross Beta 3.19 i 0.07 9.19 t 0.19 3.42 +/- 0.07 5.53 +/- 0.14 Be" < 0.17 < 0.25 < 0.14 0.80 +/- 0.27 K'4 2.76 + 0.40 7.20 + 0.70 3.22 +/- 0.33 5.93 +/- 0.62 Mn"x < 0.012 < 0.029 < 0.010 < 0.025 Fess < 0.031 < 0.062 < 0.027 < 0.025 Coss < 0.008 < 0.025 < 0.012 < 0.025 CoO < 0.017 < 0.035 < 0.006 < 0.020 Zn' 5 < 0.026 < 0.073 < 0.025 < 0.020 Nb' 5 < 0.013 < 0.025 < 0.012 < 0.023 Zr" < 0.026 < 0.056 < 0.017 < 0.034 1131 < 0.022 < 0.021 < 0.015 < 0.037 Cs 134 < 0.022 < 0.028 < 0.014 < 0.014 Cs" 7 < 0.017 < 0.029 < 0.008 < 0.031 Ba140 < 0.050 < 0.106 < 0.077 < 0.078 La 140 < 0.011 < 0.017 < 0.010 < 0.010 Ce14' < 0.090 < 0.137 < 0.107 < 0.165

-- page 116 of 122 --

CL-117 GREEN LEAFY VEGETABLE ACTIVITY (pCI/g wet)

Date Collected 30 Jun 04 30 Jun 04 30 Jun 04 28 Jul 04 28 Jul 04 Sample Type Lettuce Cabbage Swiss Chard Cabbage Chwasrds Gross Beta 5.04 +/- 0.10 2.38 +/- 0.05 5.27 +/- 0.10 2.47 +/- 0.05 7.10+/- 0.11 Be7 0.34 +/- 0.19 < 0.21 < 0.22 <0.19 < 0.15 K40 4.02 +/- 0.50 2.12 +/- 0.38 6.18 +/- 0.44 2.79 +/- 0.40 4.76 +/- 0.40 Mn54 < 0.018 < 0.016 < 0.009 <0.019 < 0.016 Fe' <0.017 < 0.024 < 0.020 < 0.020 < 0.018 Coss < 0.011 < 0.012 <0.010 <0.016 < 0.011 Cos* < 0.015 < 0.017 <0.010 <0.018 < 0.017 Zn'5 < 0.021 < 0.016 < 0.030 < 0.020 < 0.039 Nb"5 <0.017 < 0.020 < 0.01 1 < 0.010 <0.019 Zr95 < 0.034 < 0.031 < 0.030 < 0.032 < 0.028 1131

< 0.027 < 0.026 < 0.027 < 0.030 < 0.022 Cs"4' < 0.020 <0.015 < 0.014 < 0.021 <0.016 Cs"7' <0.017 <0.016 < 0.009 <0.013 <0.013 Ba140 <0.048 < 0.050 < 0.062 < 0.062 < 0.075 La'40 < 0.010 < 0.016 < 0.009 < 0.008 <0.013 Ce'44 < 0.199 < 0.100 < 0.112 < 0.091 < 0.078 Date Collected 25 Aug 04 25 Aug 04 29 Aug 04 29 Aug 04 29 Aug 04 Sample Type Swiss Chard Cabbage Swiss Chard Cabbage Beans Gross Beta 5.17+/- 0.10 3.16 +/- 0.06 7.19 +/- 0.17 7.22 +/- 0.17 5.78 +/- 0.17 Be7 0.36 +/- 0.17 < 0.17 < 0.11 < 0.16 0.68 +/- 0.21 K40 4.81 +/- 0.50 2.18 +/- 0.38 6.61 +/- 0.46 5.70 +/- 0.64 5.14 +/- 0.72 Mn54 <0.017 < 0.019 <0.010 < 0.021 <0.016 Fe" <0.019 < 0.043 < 0.032 < 0.031 < 0.022 Cos" <0.016 <0.014 < 0.008 < 0.016 <0.013 Co' 0 <0.016 < 0.018 < 0.009 < 0.021 < 0.010 Zn6" < 0.043 < 0.018 < 0.023 < 0.032 < 0.046 Nb's <0.017 < 0.020 < 0.017 < 0.020 < 0.020 Zr's < 0.043 < 0.025 < 0.022 < 0.042 < 0.035 1131

< 0.026 < 0.028 < 0.019 < 0.027 < 0.039 Cs 13

" <0.018 < 0.012 <0.012 < 0.011 < 0.017 Cs"7~ <0.017 < 0.014 <0.013 < 0.018 < 0.023 Ba'40 < 0.047 < 0.059 < 0.048 < 0.105 < 0.095 La140 < 0.007 < 0.009 <0.010 <0.014 < 0.015 Ce 144 < 0.138 < 0.126 < 0.086 < 0.143 < 0.105

-- page 117 of 122 --

CL-11 8 GREEN LEAFY VEGETABLE ACTIVITY (pCilg wet)

Date Collected 30 Jun 04 30 Jun 04 30 Jun 04 28 Jul 04 28 Jul 04 Sample Type Lettuce Cabbage Swiss Chard Cabbage Swiss Chard Gross Beta 4.35 +/- 0.08 5.20 +/- 0.12 8.67 +/- 0.15 2.30 +/- 0.05 7.08 +/- 0.14 Be" < 0.18 < 0.14 < 0.20 < 0.16 < 0.12 K'° 3.53 +/- 0.54 4.20 +/- 0.39 8.04 +/- 0.57 2.22 +/- 0.32 6.44 +/- 0.43 Mn54 < 0.011 < 0.008 < 0.020 <0.012 < 0.009 Fes < 0.033 < 0.019 < 0.026 < 0.018 < 0.017 co" < 0.021 < 0.010 < 0.013 < 0.008 < 0.012 Colo < 0.016 < 0.013 < 0.014 < 0.008 < 0.013 Zn'6 < 0.021 < 0.011 < 0.024 < 0.022 < 0.024 Nb95 < 0.018 < 0.015 < 0.021 < 0.013 < 0.015 Zr"s < 0.023 < 0.027 < 0.027 < 0.014 < 0.017 1131

< 0.027 < 0.019 < 0.016 <0.018 < 0.013 Cs"' < 0.021 < 0.013 < 0.007 < 0.011 < 0.015 Cs 13 ' < 0.019 < 0.011 < 0.016 < 0.010 < 0.009 Ba"° < 0.099 < 0.047 < 0.067 < 0.035 < 0.035 La"14 < 0.019 < 0.009 < 0.023 < 0.007 < 0.009 Ce 14' < 0.114 < 0.095 < 0.137 < 0.079 < 0.094 Date Collected 28 Jul 04 25 Aug 04 25 Aug 04 25 Aug 04 29 Sep 04 Sample Type Lettuce Lettuce Swiss Chard Cabbage Swiss Chard Gross Beta 6.25 +/- 0.12 6.72 +/- 0.14 5.87 +/- 0.11 4.70 +/- 0.09 8.06 +/- 0.17 Be7 < 0.26 1.26 +/- 0.27 0.29+/- 0.16 <0.16 < 0.22 K4° 6.27 +/- 0.73 5.55 +/- 0.53 5.84 +/- 0.38 3.03 +/- 0.60 6.31 +/- 0.80 Mn"4 < 0.008 < 0.020 < 0.010 <0.016 < 0.026 Fe59 < 0.031 < 0.044 < 0.024 < 0.042 < 0.029 Coss

< 0.022 < 0.013 <0.012 < 0.024 < 0.019 Co'° < 0.024 < 0.011 < 0.013 <0.017 <0.010 Zn'5 < 0.033 < 0.039 < 0.027 < 0.039 < 0.037 Nb"s < 0.022 < 0.008 < 0.010 < 0.006 < 0.023 Zr"5 < 0.033 < 0.018 < 0.021 < 0.020 < 0.056 1131 < 0.038 < 0.042 <0.013 <0.016 < 0.031 Cs" < 0.026 < 0.018 < 0.006 < 0.022 - < 0.026 Cs"7' < 0.018 < 0.014 <0.010 < 0.014 <0.019 Ba"14 < 0.108 < 0.093 < 0.034 < 0.098 < 0.096 La"14 < 0.020 < 0.012 < 0.006 <0.013 < 0.021 Ce" ' < 0.106 < 0.147 < 0.094 < 0.109 < 0.127

-- page 118 of 122 --

CL-118 GREEN LEAFY VEGETABLE ACTIVITY (continued)

(pCi/g wet)

Date Collected 29 Sep 04 29 Sep 04 Sample Type Milkweed Milkweed Gross Beta 7.00+/- 0.17 11.73 +/- 0.27 Be" 1.11 i 0.40 2.81 +/- 0.47 K40 7.49 +/- 0.77 12.96+/- 1.10 Mn 54 <0.018 < 0.026 Feso < 0.036 < 0.061 co so < 0.029 < 0.027 Cosa < 0.030

< 0.020 Znes < 0.073 < 0.055 5 < 0.022 NbW < 0.033 Zr'5 < 0.047 < 0.026 1131

< 0.031 < 0.058 Cs 13 < 0.027 < 0.028 cs137 Cs" 7 < 0.021 < 0.027 Ba140 < 0.141 < 0.143 La140 < 0.029 < 0.023 Ce1 4' < 0.159 < 0.189

- page 119 of 122 --

CL-19 FISH ACTIVITY (pCIg wet)

Date 05 Apr 04 05 Apr 04 05 Apr 04 05 Apr 04 Collected Largemouth White Bass I Type Carp Bluegill Bass Crappie Be7 < 0.07 < 0.13 < 0.20 < 0.07 K' 0 3.00 i 0.32 3.51 i 0.35 2.58 +/- 0.42 2.97 +/- 0.30 Mn54 < 0.007 < 0.008 <0.012 < 0.008 Fe'9 <0.019 < 0.031 < 0.030 < 0.014 Coss < 0.011 < 0.007 <0.011 < 0.008 Co'° < 0.012 < 0.007 < 0.009 < 0.005 Zn"s <0.017 < 0.008 < 0.049 < 0.028 Zr95 < 0.020 < 0.031 < 0.035 <0.015 Nb9s <0.018 <0.010 < 0.018 <0.011 Cs"'

1

<0.012 . < 0.009 < 0.010 < 0.011 Cs "7 < 0.009

< 0.007 < 0.009 < 0.010 Ba140 < 0.111 < 0.124 < 0.285 < 0.115 La140 < 0.025 < 0.017 < 0.073 < 0.014 Ce'44 < 0.099 < 0.055 < 0.059 < 0.047 Date I1 Oct 04 1,1 Oct 04 11 Oct 04 11 Oct 04 Collected Largemouth Black & White Type Carp Bluegill Bass Crappie Be7 < 0.12 <0.2 <0.18 < 0.25 K40 2.75 +/- 0.45 3.01 +/- 0.39 2.23 +/- 0.34 2.49 +/- 0.62 Mns4 < 0.014 <0.012 < 0.014 < 0.021 Fes9 < 0.069 < 0.037 < 0.021 < 0.046 Co"s < 0.021 < 0.012 <0.010 < 0.026 Co'° <0.011 <0.015 <0.010 < 0.021 Zn"5 < 0.014 < 0.014 < 0.017 < 0.029 Nb"5 < 0.026 < 0.036 < 0.023 < 0.072 Zr"s < 0.033 <0.016 < 0.024 < 0.040 Cs'"' < 0.013 <0.011 <0.017 < 0.021 Cs" 37 <0.017 <0.012 <0.016 < 0.020 Ba'40 < 0.504 < 0.210 < 0.409 < 0.402 La'40 < 0.124 - <0.048 < 0.049 < 0.078 Ce'44 < 0.079 < 0.065 < 0.091 < 0.135

- page 120 of 122 -

CL-105 FISH ACTIVITY (Control)

(pCI/g wet)

Date 05 Apr 04 05 Apr 04 05 Apr 04 05 Apr 04 Collected Type Carp Largemouth Bass Bluegill White Bass /

Crappie Be' < 0.17 < 0.15 < 0.15 < 0.17 K'° 3.18 +/- 0.47 2.62 +/- 0.43 2.40 +/- 0.37 2.52 +/- 0.50 Mns4 <0.015 <0.011 < 0.010 <0.010 Fe'9 < 0.035 < 0.051 < 0.033 < 0.032 Co5' < 0.016 < 0.014 < 0.007 <0.013 Co'° < 0.013 <0.012 < 0.010 <0.015 Zn" < 0.039 < 0.031 < 0.027 < 0.036 Nbs < 0.028 < 0.028 < 0.020 <0.041 Zr's < 0.014 < 0.014 < 0.010 < 0.020

<0.012 <0.012 <0.012 < 0.020 cs137

<0.010 <0.013 < 0.012 <0.013 Ba1 40 <0.199 < 0.170 < 0.112 < 0.262 La 140 < 0.044 < 0.049 < 0.030 < 0.088 Ce'" < 0.053 < 0.055 < 0.101 < 0.059 Date 11 Oct 04 11 Oct 04 11 Oct 04 11 Oct 04 Collected Striper I White Type Carp Largemouth Bass Bluegill Hybrids Be' < 0.36 < 0.16 < 0.17 < 0.22 K40 2.75 +/- 0.50 2.79 +/- 0.41 2.12 +/- 0.49 2.81 +/- 0.39 Mn"4 < 0.024 < 0.010 < 0.019 < 0.009 Fe" < 0.047 < 0.038 < 0.045 < 0.044 co58 < 0.029 < 0.013 < 0.023 < 0.016 Co'O <0.019 < 0.017 < 0.010 < 0.009 Znos < 0.051 < 0.016 < 0.021 < 0.029 Nb"s < 0.051 < 0.035 < 0.064 < 0.038 Zr"5 < 0.040 < 0.017 < 0.047 < 0.017 Cs"' < 0.020 < 0.009 < 0.024 < 0.015 Cs"' < 0.027 < 0.011 < 0.022 < 0.017 Ba 14 ' < 0.573 < 0.236 < 0.590 < 0.265 La14 ' < 0.083 < 0.081 < 0.097 < 0.110 Ce' < 0.123 < 0.068 < 0.098 < 0.092

- page 121 of 122 -

CL-7B SHORELINE SEDIMENT ACTIVITY (pCI/g dry)

Date 05 Apr 04 11 Oct 04 Collected Be7 < 0.15 < 0.21 K40 5.78 i 0.55 6.49 +/- 0.47 Mn54 < 0.017 < 0.014 Fess < 0.032 < 0.078 Co's <0.013 < 0.022 Co"° < 0.008 < 0.010 Zn 65 < 0.042 < 0.046 Nb's < 0.030 < 0.040 Zr95 < 0.021 < 0.040 Cs134 < 0.020 < 0.024 Cs137

< 0.012 < 0.014 Ba 1 40 < 0.084 < 0.520 La 140 < 0.027 < 0.063 Ce 144 < 0.049 < 0.059

-- page 122 of 122 --