M200204, Annual Radiological Environmental Operating Report

Annual Radiological Environmental Operating Report

ML021840776
Person / Time
Site:	Monticello
Issue date:	05/15/2002
From:	Forbes J Nuclear Management Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
M2002049
Download: ML021840776 (61)

Text

Monticello Nuclear Generating Plant Committed to Nu Excen Operated by Nuclear Management Company, LLC May 15, 2002 Technical Specification 6.7.C.1 US Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 M2002049 MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 2001 Annual Radiolooical Environmental Operating Report In accordance with the Monticello Technical Specification 6.7.C. 1, we are submitting the annual Radiological Environmental Operating Report for the year 2001. Please note Amendment 120 dated 07/24/01 changed our Technical Specification deadline for this report to May 15 of each year.

This letter contains no new NRC commitments, nor does it modify any prior commitments.

Pease contact Paul Hartmann at (763) 271-5172 with any questions or comments.

Jeffrey S. Forbes Site Vice President Monticello Nuclear Generating Plant Attachment c: Regional Administrator-Ill, NRC NRR Project Manager, NRC Resident Inspector, NRC Minnesota Department of Commerce J:\LICENSEXPeriodic ReportsR E M PWnnual Radiological Envir OpeWReport 2001 .doc 2807 West County Road 75 o Monticello, Minnesota 55362-9637 pot Telephone: 763-295-5151 & Fax: 763-295-1454

- Environmental, Inc.

Midwest Laboratory an Allegheny Technologies Co.

700 Landwehr Road

• Northbrook, IL 60062-2310 ph. (847) 564-0700 *fax (847) 564-4517 XCEL ENERGYCORPORATION MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 LICENSE NO. DPR-22 ANNUAL REPORT TO THE UNITED STATES NUCLEAR REGULATORY COMMISSION Radiological Environmental Monitoring Program January 1 to December 31, 2001 Prepared under Contract by ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8010 Approved:

Bronia Gro S.

Laboraory M ager

PREFACE The staff of Environmental, Inc., Midwest Laboratory was responsible for the acquisition of data presented in this report. Samples were collected by personnel of the Monticello Nuclear Generating Plant, operated by Nuclear Management Company, LLC for XCEL Energy Corporation. This report was prepared by Environmental, Inc.,

Midwest Laboratory.

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TABLE OF CONTENTS No. Page Preface ................................................................................................................................ ii List of Tables ...................................................................................................................... iv List of Figures ...................................................................................................................... v

1.0 INTRODUCTION

................................................................................................................. 1 2.0

SUMMARY

.......................................................................................................................... 2 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP) ................... 3 3.1 Program Design and Data Interpretation .......................................................... 3 3.2 Program Description .......................................................................................... 4 3.3 Program Execution ........................................................................................... 5 3.4 Laboratory Procedures .................................................................................... 6 3.5 Program Modifications ........................................................................................ 6 3.6 Land Use Census .............................................................................................. 6 4.0 RESULTS AND DISCUSSION ....................................................................................... 7 4.1 Atmospheric Nuclear Detonations and Nuclear Accidents ................................. 7 4.2 Sum m ary of Preoperational Data ..................................................................... 7 4.3 Program Findings .............................................................................................. 8 5.0 FIGURES AND TABLES ................................................................................................ 12

6.0 REFERENCES

.................................................................................................................. 24 APPENDICES A Interlaboratory Comparison Program Results .............................................................. A-1 B Data Reporting Conventions ......................................................................................... B-1 C Maximum Permissible Concentrations of Radioactivity in Air and Water Above Natural Background in Unrestricted Area ........................................................ C-1 D Sam pling Location Maps .................................................................................................... D-1 iii

LIST OF TABLES No. Title Paae 5.1 Sam ple Collection and Analysis Program ................................................................. 13 5.2 Sam pling Locations .................................................................................................. 14 5.3 Missed Collections and Analyses .............................................................................. 16 5.4 Radiation Environm ental Monitoring Program Sum m ary ......................................... 19 The following tables are in the Appendices:

Appendix A A-1 Interlaboratory Comparison Program Results .......................................................... A1-1 A-2 Interlaboratory Comparison Program Results, thermoluminescent dosimeters (TLDs) ................................................................................................................ A2-1 A-3 In-house Spiked Samples ............................................................................................... A3-1 A-4 In-house "Blank" Samples .............................................................................................. A4-1 A-5 In-house "Duplicate" Samples ................................................................................... A5-1 A-6 Department of Energy MAPEP comparison results ....................................................... A6-1 A-7 Environmental Measurements Laboratory Quality (EML) Assessment Program comparison results ......................................................................................... A7-1 Attachment A: Acceptance criteria for spiked samples ................................................ A2 Appendix C C-1 Maximum Permissible Concentrations of Radioactivity in air and water above background in unrestricted areas ......................................................................... C-2 iv

LIST OF FIGURES No. Title Page 5-1 Offsite Ambient Radiation (TLDs), inner versus outer ring locations,1985-2001 ................. 17 5-2 Airborne Particulates; analysis for gross beta, average mean of all indicator locations (M-2, 3, 4, 5) versus control location (M-1), 1985-2001 .................. I...18 Appendix D D-1 Sample collection and analysis program: TLD locations, General Area of Site Boundary ................................................................................................... D-2 D-2 Sample collection and analysis program: TLD locations, 4 to 5 miles Distant from the Plant, Control and Special Interest locations .............................................................................. D-3 D-3 Sample collection and analysis program: Radiological Environmental Monitoring Program, Sampling locations ................................................................................................ D-4 V

1.0 INTRODUCTION

This report summarizes and interprets results of the Radiological Environmental Monitoring Program (REMP) conducted by Environmental, Inc., Midwest Laboratory for the Monticello Nuclear Generating Plant, Monticello, Minnesota, during the period January - December, 2001. This Program monitors the levels of radioactivity in the air, terrestrial, and aquatic environments in order to assess the impact of the Plant on its surroundings.

Tabulation of the individual analyses made during the year are not included in this report. These data are included in a reference document (Environmental, Inc., Midwest Laboratory, 2002a) available at the Monticello Nuclear Generating Plant, Chemistry and Radiation Protection Department.

Monticello Nuclear Generating Plant is a boiling water reactor with a nominal generating capacity of 620 MWe. It is located on the Mississippi River in Wright County, Minnesota, and operated by Nuclear Management Company, LLC. Initial criticality was achieved on December 10, 1970. Full power was achieved March 5, 1971 and commercial operation began on June 30, 1971.

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2.0

SUMMARY

The Radiological Environmental Monitoring Program (REMP) required by the U.S.

Nuclear Regulatory Commission (NRC) Technical Specifications and the Offsite Dose Calculation Manual (ODCM) for the Monticello Nuclear Generating Plant is described.

Results for the year 2001 are summarized and discussed.

Program findings show background levels of radioactivity in the environmental samples collected in the vicinity of the Monticello Nuclear Generating Plant.

No effect on the environment due to the operation of the Monticello Nuclear Generating Plant is indicated.

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3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP) 3.1 Program Design and Data Interpretation The purpose of the Radiological Environmental Monitoring Program (REMP) at the Monticello Nuclear Generating Plant is to assess the impact of the Plant on its environment. For this purpose, samples are collected from the air, terrestrial, and aquatic environments and analyzed for radioactive content. In addition, ambient gamma radiation levels are monitored by thermoluminescent dosimeters (TLD's).

Sources of environmental radiation include the following:

(1) Natural background radiation arising from cosmic rays and primordial radionuclides; (2) Fallout from atmospheric nuclear detonations; (3) Releases from nuclear power plants; (4) Industrial and medical radioactive waste; and (5) Fallout from nuclear accidents.

In interpreting the data, effects due to the Plant must be distinguished from those due to other sources.

A major interpretive aid in assessment of these effects is the design of the monitoring program at the Monticello Plant which is based on the indicator-control concept. Most types of samples are collected both at indicator locations (nearby, downwind, or downstream) and at control locations (distant, upwind, or upstream). A plant effect would be indicated if the radiation level at an indicator location was significantly larger than that at the control location. The difference would have to be greater than could be accounted for by typical fluctuations in radiation levels arising from other sources.

An additional interpretive technique involves analyses for specific radionuclides present in environmental samples collected from the Plant site. The Plant's monitoring program includes analyses for tritium and iodine-131. Most samples are also analyzed for gamma-emitting isotopes with results for the following groups quantified: zirconium-95, cesium-137, cerium-144, beryllium-7, and potassium-40. The first three gamma emitting isotopes were selected as radiological impact indicators because of the different characteristic proportions in which they appear in the fission product mix produced by a nuclear reactor and that produced by a nuclear detonation. Each of the three isotopes is produced in roughly equivalent amounts by a reactor: each constitutes about 10% of the total activity of fission products 10 days after reactor shutdown. On the other hand, 10 days after a nuclear explosion, the contributions of zirconium-95, cerium-144, and cesium-137 to the activity of the resulting debris are in the approximate ratio 4:1:0.03 (Eisenbud, 1963). Beryllium-7 is of cosmogenic origin and potassium-40 is a naturally-occurring isotope. They were chosen as calibration monitors and should not be considered as radiological impact indicators.

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Program Desigqn and Data Interpretation (continued)

The other group quantified consists of niobium-95, ruthenium-103 and -106, cesium 134, barium-lanthanum-140, and cerium-141. These isotopes are released in small quantities by nuclear power plants, but to date their major source of injection into the general environment has been atmospheric nuclear testing. Nuclides of the final group, manganese-54, iron-59, cobalt-58 and -60, and zinc-65, are activation products and arise from activation of corrosion products. They are typical components of a nuclear power plant's effluents, but are not produced in significant quantities by nuclear detonations.

Other means of distinguishing sources of environmental radiation are employed in interpreting the data. Current radiation levels are compared with previous levels, including those measured before the plant became operational. Results of the Plant's Monitoring Program can be related to those obtained in other parts of the world. Finally, results can be related to events known to cause elevated levels of radiation in the environment, e.g., atmospheric nuclear detonations.

3.2 Program Description The sampling and analysis schedule for the Radiological Environmental Monitoring Program (REMP) at the Monticello Plant is summarized in Table 5.1 and briefly reviewed below. Table 5.2 defines the sampling location codes used in Table 5.1 and specifies for each location its type (indicator or control) and its distance, direction, and sector relative to the plant site. To assure that sampling is carried out in a reproducible manner, detailed sampling procedures have been prescribed (Monticello Generating Plant REMP Surveillances, Current Revision). Maps of sampling locations are included in Appendix D.

To monitor the air environment, airborne particulates are collected on membrane filters by continuous pumping at five locations. Also, airborne iodine is collected by continuous pumping through charcoal filters at all of these locations. Filters are changed and counted weekly. Particulate filters are analyzed for gross beta activity and charcoal filters for iodine-131. Quarterly composites of particulate filters from each location are gamma-scanned on a HPGe detector. One of the five locations is a control (M-1), and four are indicators (M-2, M-3, M-4, M-5). One of the indicators is located in the geographical sector expected to be most susceptible to any atmospheric emissions from the Plant (highest D/Q sector).

Ambient gamma radiation is monitored at forty locations, using CaSO4:Dy dosimeters with four sensitive areas at each location: fourteen in an inner ring in the general area of the site boundary, sixteen in the outer ring within 4-5 mile radius, six at special interest locations and four control locations, outside a 10 mile radius from the plant. They are replaced and measured quarterly. An emergency set of TLDs is placed in the field along side of the regular set. The emergency TLDs are returned to EIML quarterly for annealing and repackaging.

Milk samples are collected monthly from three farms (two indicator and one control).

There are currently only two milk producers within the indicator area. Milk is collected biweekly during the growing season (May - October), because the milk animals may be on pasture. All samples are analyzed for iodine-131 and gamma-emitting isotopes.

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Proaram DescriDtion (continued)

Leafy green vegetables (cabbage) are collected annually from the highest D/Q garden and a control location and analyzed for iodine-131. Corn and potatoes are collected annually only if the field is irrigated by water in which liquid radioactive effluent has been discharged. Analysis is for gamma-emitting isotopes.

The terrestrial environment is also monitored by the quarterly collections of well water from four locations. Samples are analyzed for tritium and gamma-emitting isotopes.

River water is collected weekly at two locations, one upstream of the plant and one downstream. Monthly composites are analyzed for gamma-emitting isotopes. Quarterly composites are analyzed for tritium.

Drinking water is collected weekly from the City of Minneapolis water supply, which is taken from the Mississippi River downstream of the Plant. Monthly composites are analyzed for gross beta, iodine-131, and gamma-emitting isotopes. Quarterly composites are analyzed for tritium.

The aquatic environment is also monitored by semi-annual upstream and downstream collections of fish, invertebrates, and shoreline sediments. Shoreline sediment is also collected semi-annually from one downstream recreational location. All samples are analyzed for gamma-emitting isotopes.

3.3 Program Execution The Program was executed as described in the preceding section with the following exceptions:

(1) A partial air particulate/air iodine sample was obtained from location M-3 for the week ending 01-31-01, Power was lost for approximately 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> during an ice storm.

(2) No air particulate/air iodine sample was available from location M-3 for the week ending 06-13-01, The circuit breaker was tripped.

(3) Invertebrate samples were not available for the upstream and downstream river locations, M-8 and M-9 in May, 2001. Water levels were high due to above average rainfall.

(4) TLD data was not available from location M-02S for the second quarter, 2001. Both the regular and emergency TLDs were lost in the field.

(5) Milk samples were not available from M-28 (Hoglund Farm) from July 28 through December, 2001. Dairy operations have been temporarily discontinued.

Deviations from the program are summarized in Table 5.3.

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3.4 Laboratory Procedures The iodine-131 analyses in milk and drinking water were made using a sensitive radiochemical procedure which involves separation of the iodine using an ion-exchange method and solvent extraction and subsequent beta counting.

All gamma-spectroscopic analyses were performed with an HPGe detector. Levels of iodine-131 in cabbage and natural vegetation were determined by gamma spectroscopy.

Concentrations of airborne iodine-131 in charcoal samples were also determined by gamma spectroscopy.

Tritium was determined by a liquid scintillation technique.

Analytical Procedures used by Environmental, Inc. are on file and are available for inspection. Procedures are based on those prescribed by the Health and Safety Laboratory of the U.S. Dep't of Energy, Edition 28, 1997, U.S. Environmental Protection Agency for Measurement of Radioactivity in Drinking Water, 1980, and the U.S.

Environmental Protection Agency, EERF, Radiochemical Procedures Manual, 1984.

Environmental, Inc., Midwest Laboratory has a comprehensive quality control/quality assurance program designed to assure the reliability of data obtained. Details of the QA Program are presented elsewhere (Environmental, Inc., Midwest Laboratory, 2000 ).

The QA Program includes participation in Interlaboratory Comparison (crosscheck)

Programs. Results obtained in the crosscheck programs are presented in Appendix A.

3.5 Progqram Modifications There were no program modifications made during the year 2001.

3.6 Land Use Census In accordance with the Offsite Dose Calculation Manual, sec. 07.01, a land use census shall be conducted and shall identify the location of the nearest milk animal, the nearest residence, and the nearest garden of greater than 500 ft2 producing fresh leafy vegetables, in each of the 16 meteorological sectors within a distance of 5 miles. The census shall also identify the locations of all milk animals and all 500 ft2 or greater gardens producing broad leaf vegetation in each of the meteorological sectors within a distance of three miles. This census shall be conducted at least once per year between the dates of May 1 and October 31. New locations shall be added to the radiation environmental monitoring program within 30 days and sampling locations having lower calculated doses or a lower dose commitment may be deleted from this monitoring program after October 31 of the year in which the land use census was conducted. The 2001 land use census was conducted between August 6 and September 28, 2001. The highest D/Q locations did not change from the 2000 census, Detailed land use census data are contained in the Land Use Census and Critical Receptor Report, Monticello Nuclear Generating Plant, Chemistry and Radiation Protection Department.

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4.0 RESULTS AND DISCUSSION All of the scheduled collections and analyses were made except those listed in Table 5.3.

All results are summarized in Table 5.4 in a format recommended by the Nuclear Regulatory Commission in Regulatory Guide 4.8. For each type of analysis of each sampled medium, this table lists the mean and range for all indicator locations and for all control locations. The locations with the highest mean and range are also shown.

4.1 Atmospheric Nuclear Detonations and Nuclear Accidents There were no reported accidents at nuclear facilities and no atmospheric nuclear tests conducted in the year 2001. The last reported test was made by the People's Republic of China on October 16, 1980.

4.2 Summary of Preoperational Data The following constitutes a summary of preoperational studies conducted at the Monticello Nuclear Generating Plant during the years 1968 to 1970, to determine background levels expected in the environment, and provided, where applicable, as a means for comparison with present day levels. Strict comparisons, however, are difficult to make, since background levels of radiation were much higher in these years due to radioactive fallout from the atmosphere. Gross beta measurements in fallout averaged 20,600 pCi/m 2 in 1969 and 12,000 pCi/m 2 in 1970. These levels are reflected throughout the various media tested.

In the air environment, ambient gamma radiation (TLDs) averaged 9.1 mRem/4 weeks during preoperational studies (1970). Gross beta in air particulates in 1969 and 1970 averaged 0.20 pCi/m 3 . Present day levels have stabilized at around 0.025 pCi/m 3 .

Airborne radioiodine remained below detection levels.

In the terrestrial environment of 1968 to 1970, milk, agricultural crops, and soil were monitored. In milk samples, low levels of Cs-137 and Sr-90 were detected. Cs-137 levels averaged 16.7 pCi/L. Soybean crop measurements in 1969 averaged 35.5 pCi/g for gross beta and 0.3 pCi/g for Cs-137. Gross beta measured in soil averaged 51.7 pCi/g . Present day measurements for cesium-137 are below detection levels in milk and agricultural crops.

The aqueous environment was monitored by testing of river water, bottom sediments, fish, aquatic vegetation, and periphyton. Specific location comparison of drinking, river, and well water concentrations for tritium and gross beta are not possible. However, tritium background levels, measured at seven separate locations from 1968 to 1970, averaged 970 pCi/L. Present day environmental samples measure below detection levels. Values for gross beta, measured from 1968 to 1970, averaged 9.8 pCi/L in upstream and downstream Mississippi River water, 4.4 pCi/L for well waters, and 18.6 pCi/L for lake waters. Gamma emitters were below the lower limit of detection (LLD). In shoreline sediments, gross beta background levels in 1970 averaged 49.8 pCi/g for both upstream and downstream samples. Cs-137 activity averaged 0.10 pCi/g for both upstream and downstream samples. Low levels of Cs-1 37, occasionally observed today can still be attributed to residual activity from atmospheric fallout. Gross beta levels in 7

4.2 Summary of Preoperational Data (continued) fish flesh averaged 5.3 pCi/g in 1968 and 1969. Cs-137, measured in 1969 and 1970, averaged 0.044 pCi/g. Gross beta background levels, in 1970, for aquatic vegetation, algae, and periphyton samples measured 86.7 pCi/g, 76.5 pCi/g, and 28.1 pCi/g respectively.

4.3 Program Findings Results obtained show background levels of radioactivity in the environmental samples collected in the vicinity of the Monticello Nuclear Generating Plant.

Ambient Radiation (TLD's)

Ambient radiation was measured in the general area of the site boundary, at an outer ring 4 - 5 mi. distant from the Plant, at special interest areas and at four control locations. The means were similar for both inner and outer rings (14.3 and 13.7 mRem/91 days, respectively). The mean for special locations was 13.5 mRem/91 days.

The mean for control locations was 14.1 mRem/91 days. Dose rates measured at the inner and outer ring locations were similar to those observed from 1985 through 2000 and are tabulated below. No plant effect on ambient gamma radiation is indicated (Figure 5-1).

Year Inner Rinq Outer Ring Doserate Rem/91 days) 1985 12.6 12.8 1986 14.6 14.1 1987 15.4 15.5 1988 14.8 14.7 1989 15.0 15.4 1990 16.1 16.2 1991 15.2 15.8 1992 15.1 15.1 1993 15.6 15.9 1994 14.6 14.0 1995 14.4 13.6 1996 14.0 13.5 1997 13.3 12.8 1998 15.0 14.4 1999 15.1 14.3 2000 15.1 14.5 2001 14.3 13.7 Ambient gamma radiation as measured by thermoluminescent dosimetry.

Average quarterly dose rates, Inner vs. Outer Ring locations 8

Airborne Particulates The average annual gross beta concentrations in airborne particulates were almost identical at indicator and control locations (0.027 pCi/m 3 and 0.026 pCi/m 3 ,

respectively) and were similar to levels observed from 1985 through 2000. The results are tabulated below. The data for 1986 does not include the results from May 19 to June 9, 1986, which were influenced by the accident at Chernobyl. (Figure 5-2).

Year Indicators Control 3

Concentration (pCi/m )

1985 0.025 0.024 1986 0.026 0.026 1987 0.026 0.026 1988 0.030 0.030 1989 0.027 0.026 1990 0.023 0.023 1991 0.024 0.024 1992 0.023 0.023 1993 0.024 0.023 1994 0.023 0.024 1995 0.024 0.025 1996 0.023 0.023 1997 0.023 0.023 1998 0.023 0.023 1999 0.023 0.025 2000 0.027 0.026 2001 0.027 0.026 Average annual gross beta concentrations in airborne particulates.

A spring peak in beta activity had been observed almost annually for many years (Wilson et al., 1969). It had been attributed to fallout of nuclides from the stratosphere (Gold et al., 1964). It was pronounced in 1981, occurred to a lesser degree in 1982, and has not occurred since 1983. The highest averages occur during the months of January and December, and the first and fourth quarters, as seen in 1985 through 2001.

Two pieces of evidence indicate conclusively that the elevated activity observed during the first and fourth quarters was not attributable to the Plant operation. In the first place, elevated activity of similar size occurred simultaneously at both indicator and control locations. Secondly, an identical pattern was observed at the Prairie Island Nuclear Generating Plant, about 100 miles distant from the Monticello Nuclear Generating Plant (XCEL Energy Corp., 2002b).

Gamma spectroscopic analysis of quarterly composites of air particulate filters yielded similar results for indicator and control locations. Beryllium-7, which is produced continuously in the upper atmosphere by cosmic radiation (Arnold and AI-Salih, 1955) was detected in all samples, with an average activity of 0.060 pCi/m 3 for all locations.

All other gamma-emitting isotopes were below their respective LLD limits.

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Airborne Iodine Weekly levels of airborne iodine-131 were below the lower limit of detection (LLD) of 0.07 pCi/m 3 in all samples.

Milk Iodine-131 activity measured below the detection limit of 1.0 pCi/L in all samples.

Cesium-1 37 results were below the LLD level of 15 pCi/L in all samples.

No other gamma-emitting isotopes except naturally-occurring potassium-40, were detected in milk samples. This is consistent with the finding of the National Center for Radiological Health (1968) that most radiocontaminants in feed do not find their way into milk due to the selective metabolism of the cow. The common exceptions are radioisotopes of potassium, cesium, strontium, barium, and iodine.

In summary, the milk data for 2001 show no radiological effects of the plant operation.

River Water and Drinkina Water Tritium was below the LLD of 330 pCi/L in all samples. Gross beta activity in Minneapolis drinking water averaged 2.5 pCi/L and was similar to average levels observed from 1985 through 2000. Gross beta averages are tabulated below.

Year Gross Beta (pCi/L) 1985 2.8 1986 2.5 1987 2.4 1988 2.7 1989 2.6 1990 2.2 1991 2.9 1992 2.1 1993 2.6 1994 2.0 1995 2.3 1996 2.1 1997 2.3 1998 2.4 1999 2.2 2000 2.5 2001 2.5 Average annual concentrations; Gross beta in drinking water.

Comparisons with data reported by the USEPA for Minneapolis drinking water samples collected in 1975, 1976, 1977, and 1978 indicate that concentrations of these nuclides are remaining fairly constant and are consistent with drinking water levels in other parts of the country. Gamma-emitting isotopes were below detection limits in all surface water samples. There was no indication of a plant effect.

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Well Water Tritium measured below the LLD level of 330 pCi/L in all samples. All gamma isotopic results were below detection limits. There was no indication of a plant effect.

Crops Two samples of cabbage were collected in August and analyzed for iodine-131. Levels of 1-131 measured below 0.012 pCi/g wet weight in both samples. There was no indication of a plant effect. There were no crops irrigated from the Mississippi River within 5 miles of the plant in 2001; therefore, no corn or potato samples were collected for analysis from irrigated fields.

Fish Fish samples were collected in May and October. Flesh was separated from the bones and gamma-scanned. Naturally-occurring potassium-40 was found to be similar in upstream and downstream samples (2.77 and 2.87 pCi/g wet weight, respectively). All gamma-emitting isotopes were below their respective LLD levels. There was no indication of any plant effect.

Invertebrates Two samples were collected in October. The samples were analyzed for gamma emitting isotopes. All gamma-emitting isotopes were below detection limits. There was no indication of any plant effect.

Shoreline Sediments Upstream, downstream and downstream recreational area shoreline sediment collections were made in May and October and analyzed for gamma-emitting isotopes.

Cesium-137 was detected in five of the six samples collected, averaging 0.051 pCi/g dry weight in downstream samples and 0.030 pCi/g dry weight in one of the two control samples, indicating the influence of fallout deposition. Similar levels of activities and distribution were observed in 1978-2000. The only other gamma-emitting isotopes detected were naturally-occurring beryllium-7 and potassium-40. There was no indication of a plant effect.

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5.0 FIGURES AND TABLES 12

Table 5.1. Sample collection and analysis program, Monticello Nuclear Generating Plant.

Collection Analysis Location Type and Type and Medium No. Codes (and Type)a Frequencyb Frequencyc Ambient radiation 40 M-01A - M-14A C/Q Ambient gamma (TLDs) M-01B - M-16B M-01S - M-06S M-01C - M-04C Airborne Particulates 5 M-1 (C), M-2, M-3, M-4, M-5 C/W GB, GS (QC of each location)

Airborne Iodine 5 M-I(C), M-2, M-3, M-4, M-5 C/W 1-131 Milk 3 M-10 (C), M-24, M-28 G/Md 1-131, GS Surface water 2 M-8(C), M-9 G/W GS(MC), H-3(QC)

Drinking water 1 M-14 G/W GB(MC), 1-131 (MC)

GS (MC), H-3 (QC)

Well water 4 M-10(C), M-11, M-12, M-27 G/Q H-3, GS Edible cultivated crops Corne 1 M-19 G/A GS Leafy Vegetable 2 M-27, G/A 1-131 St. Cloud Farmer's Mkt. (C)

Potatoese 1 M-21 G/A GS Fish 2 M-8(C), M-9 G/SA GS (one species, edible portion)

Periphyton or invertebrates 2 M-8(C), M-9 G/SA GS Shoreline sediment 3 M-8(C), M-9, M-15 G/SA GS a Location codes are defined in Table 5.2. Control stations are indicated by (C). All other stations are indicators.

b Collection type is coded as follows: Cl = continuous, G/ = grab. Collection frequency is coded as follows:

W= weekly, M= monthly, Q = quarterly, SA = semiannually, A = annually.

c Analysis type is coded as follows: GB = gross beta, GS = gamma spectroscopy, H-3 = tritium, 1-131 =

iodine 131. Analysis frequency is coded as follows: MC = monthly composite, QC = quarterly composite.

d Milk is collected biweekly during the grazing season (May - October), if milch animals are on pasture.

0Collected only if the plant discharges radioactive effluent into the river, then only from river irrigated fields.

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Table 5.2. Sampling locations, Monticello Nuclear Generating Plant.

Distance and Direction from Code Type' Collection Site Sample Typeb Reactor M-1 C Air Station M-1 AP, Al 11.0 mi @ 3070/NW M-2 Air Station M-2 AP, Al 0.9 mi @ 137°/SE M-3 Air Station M-3 AP, Al 0.7 mi @ 104°/ESE M-4 Air Station M-4 AP, Al 0.9 mi @ 146°/SSE M-5 Air Station M-5 AP, Al 2.7 mi @ 134°/SE M-8 C Upstream of Plant SW, SS, BO, F "<1000' upstream of Plant Intake M-9 Downstream of Plant SW, SS, BO, F "<1000' downstream of Plant Discharge M-10 C Goenner Farm M, WW 12.4 mi @ 322°/NW M-11 City of Monticello WW 3.4 mi @ 126°/SE M-12 Plant Well #1 WW 0.2 mi @ 232 0/SW M-14 City of Minneapolis DW 37.0 mi @ 132 0/SE M-1 5 Montissippi Park SS 1.4 mi @ 114°/ESE M-19 River Irrigated Corn Fieldc M-21 River Irrigated Potato Fieldc M-24 Weinand Farm M 4.8 mi @ 1780/S M-27 Wise residence (Highest D/Q Garden) VE, WW 0.6 mi @ 198°/SSW M-28 Hoglund Farm M 3.6 mi @ 300°/WNW General Area of the Site Boundary M-01A Sherburne Ave. So. TLD 0.7 mi @ 01I/N M-02A Sherburne Ave. So. TLD 0.8 mi @ 31°/NNE M-03A Sherburne Ave. So. TLD 1.3 mi @ 55 0/NE M-04A Biology Station Road TLD 0.6 mi @ 91°/E M-05A Biology Station Road TLD 0.6 mi @ 118 0/ESE M-06A Biology Station Road TLD 0.7 mi @ 130 0/SE M-07A County Road 75 TLD 0.6 mi @ 148 0/SSE M-08A County Road 75 TLD 0.6 mi @ 1700/S M-09A County Road 75 TLD 0.6 mi @ 192 0/SSW M-10A County Road 75 TLD 0.5 mi @ 218 0°SW M-11A County Road 75 TLD 0.4 mi @ 240°/WSW M-12A County Road 75 TLD 0.4 mi @ 260°/W M-13A North Boundary Road TLD 0.8 mi @ 324 0/NW M-14A North Boundary Road TLD 0.7 mi @ 340 0/NNW 14

Table 5.2. Sampling locations, Monticello Nuclear Generating Plant, (continued).

Distance and Direction from Code Type' Collection Site Sample Typeb Reactor Approximately 4 to 5 miles Distant from the Plant M-01 B Sherco #1 Air Station TLD 4.6 mi @ 03°IN M-02B County Road 11 TLD 4.4 mi @ 200/NNE M-03B County Road 73 &81 TLD 4.3 mi @ 53°/NE M-04B County Road 73 (196th St.) TLD 4.3 mi @ 68 01ENE M-05B City of Big Lake TLD 4.4 mi @ 90°/E M-06B County Road 14 and 196th St. TLD 4.4 mi @ 117 0/ESE M-07B Monte Industrial Drive TLD 4.4 mi @ 136°/SE M-08B Residence, Hwy 25 & Davidson Ave. TLD 4.7 mi @ 161°/SSE M-09B Weinand Farm TLD 4.8 mi @ 178°/S M-1OB Reisewitz Farm, Acacia Ave. TLD 4.2 mi @ 204°/SSW M-1 1 B Vanlith Farm, 97th Ave. TLD 4.0 mi @ 226°/SW M-12B Lake Maria State Park TLD 4.2 mi @ 2540/WSW M-13B Bridgewater Station TLD 4.0 mi @ 270°/W M-14B Anderson Residence, Cty Rd. 111 TLD 4.3 mi @ 289°/WNW M-15B Red Oak Wild Bird Farm TLD 4.3 mi @ 309°/NW M-16B Sand Plain Research Farm TLD 4.3 mi @ 341°/NNW Special Interest Locations M-01S Osowski Fun Market TLD 0.6 mi @ 234°/SW M-02S Edgar Klucas Residence TLD 1.1 mi @ 143°/SE M-03S Big Oaks Park TLD 1.6 mi @ 102°/ESE M-04S Pinewood School TLD 2.4 mi @ 129°/SE M-05S Rivercrest Christian Academy TLD 3.1 mi @ 118°/ESE M-06S Monte Public Works TLD 2.7 mi @ 134°/SE M-01C C Kirchenbauer Farm TLD 11.5 mi @ 323°/NW M-02C C County Roads 4 and 15 TLD 11.2 mi @ 47*/NE M-03C C County Rd 19 and Jason Ave. TLD 13.0 mi @ 100°/E M-04C C Maple Lake Water Tower TLD 10.3 mi @ 2260/ SW a "C" denotes control location. All other locations are indicators.

b Sample Codes:

AP Airborne particulates F Fish Al Airborne Iodine M Milk BS Bottom (river) sediments RW River Water BO Bottom organisms SS Shoreline Sediments DW Drinking Water VE Vegetation / vegetables WW Well Water c Collected only if the plant discharges radioactive effluent into the river, then only from river irrigated fields.

15

Table 5.3. Missed collections and analyses at the Monticello Nuclear Generating Plant.

All required samples were collected and analyzed as scheduled with the following exceptions:

Plans for Preventing Recurrence AP/AI Beta, M-3 1/31/2001 Partial sample; -5 hours None required.

1-131 lost during ice storm.

BO Gamma M-8, M-9 5/16/2001 Seasonal non-availability; None required.

high river level due to above average rainfall.

AP/AI Beta, M-3 6/13/2001 Circuit breaker tripped. Circuit and wiring inspected 1-131 Could not reset. and updated.

TLD Ambient M-02S 7/3/2001 TLD lost in the field. TLD placed on a new post Gamma Power pole moved after located in the right-of-way area.

sale of residence.

Ml Gamma, M-28 7/25/2001 Hoglund Dairy temporarily Hoglund will inform the MNGP 1-131 through out of dairy business, upon resumption of operation.

Dec., 2001 16

-I, c*.

mRI91 days C3 CD CJ 0) -J (0 1985 0

1986 1987 cn 3

(D 1988 CL 1989 0i.

1990 0 1991 1992 CD

-4 1993 cc 1994 CD 1995 W 0

0 1996 0

-'I 1997 a 3

1998 0

Cl) 1999 2000 2001

Figure 5-2. Airborne Particulates; analysis for gross beta, average mean of all indicator locations versus control location.

-- *-Indicators (M-2, 3, 0.035 _--E--- Control (M-1) 0.033 - 1 0.031 0.029 0.027 0.0250[_

E' 0.023 0.021 .

0.019_

0.017 - -

0.015 -_ _ I r to (D I- OD 0) 0 ,N 03 . I0--)

W r.- 0W M C.

(0 00 00 O0 C0 0) 0) 0) 0)3 0) 0) 0) 0) 0) 0 0

0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0M 0 0 Sr- T- ',r- - - " - - N-, 4 18

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2001 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non Type Number of LLDb Mean (F)f Mean (F)0 Mean (F)0 Routine (Units) Analysesa Rangec Locationd Range' Range 0 Results8 TLD (Inner Ring, Gamma 56 3.0 14.3 (56/56) M-12A,County Road 75 16.0 (4/4) (See Control 0 General Area at (10.8-17.7) 0.4 mi @ 260°/W (12.5-17.7) below.)

Site Boundary) mRem/91 days)

TLD (Outer Ring, Gamma 64 3.0 13.7 (64164) M-09B, Weinand Farm 15.0 (4/4) (See Control 0 4-5 mi. distant) (9.5-17.2) 4.8 mi @ 178°/S (11.1-17.2) below.)

mRemI91 days)

TLD (Special Gamma 23 3.0 13.5 (23/23) M-06S, Monticello P.W. 15.4 (4/4) (See Control 0 Interest Areas) (10.0-17.7) 2.7 mi @ 134°/SE (12.5-17.7) below.)

mRem/91 days)

TLD (Control) Gamma 16 3.0 None M-03C, County Rd.19 & 16.0 (4/4) 14.1 (16/16) 0 mRem/91 days) Jason, 13.0 mi. @ 100°/E (15.1-17.0) (11.6-16.6)

Airbome GB 259 0.005 0.027 (206/207) M-5, Air Station 0.027 (51 /51) 0.026 (52/52) 0 Particulates (0.010-0.058) 2.7 mi @ 134°/SE (0.011-0.055) (0.012-0.057)

(pCi/m 3 )

GS 20 Be-7 0.015 0.060 (16/16) M-5, Air Station 0.066(4/4) 0.062 (4/4) 0 (0.041-0.081) 2.7 mi @ 134°/SE (0.055-0.078) (0.045-0.081)

Mn-54 0.0013 < LLD - -< LLD 0 Co-58 0.0011 < LLD - -< LLD 0 Co-60 0.0010 < LLD - -< LLD 0 Zn-65 0.0015 < LLD - -< LLD 0 Zr-Nb-95 0.0019 < LLD - -< LLD 0 Ru-103 0.0015 < LLD - -< LLD 0 Ru-106 0.0081 < LLD - -< LLD 0 Cs-134 0.0008 < LLD - -< LLD 0 Cs-1 37 0.0009 < LLD - -< LLD 0 Ba-La-140 0.0020 < LLD - -< LLD 0 Ce-141 0.0019 < LLD - -< LLD 0 Ce-144 0.0056 < LLD - -< LLD 0 Airbome Iodine 1-131 259 0.07 <LLD - -< LLD 0 (pCi/m 3 )

19

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2001

( County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non Type Number of LLDb Mean (F)0 Mean (F)0 Mean (F)f Routine (Units) Analysesa Rangec Locationd Rangec Range' Resultse Milk (pCi/L) 1-131 50 1.0 < LLD < LLD 0 GS 50 K-40 200 1374 (30/30) M-24, Weinand Farm 1379 (20/20) 1361 (20/20) 0 (1220-1563) 4.8 mi @ 178°/S (1220-1563) (1102-1487)

Cs-134 15 < LLD - -< LLD 0 Cs-137 15 < LLD - -< LLD 0 Ba-La-140 15 < LLD - -< LLD 0 River Water H-3 8 330 < LLD - - < LLD 0 (pCi/L)

GS 24 Mn-54 15 < LLD - -< LLD 0 Fe-59 30 < LLD - -< LLD 0 Co-58 15 < LLD - -< LLD 0 Co-60 15 < LLD - -< LLD 0 Zn-65 30 < LLD - -< LLD 0 Zr-Nb-95 15 < LLD - -< LLD 0 Cs-134 15 < LLD - -< LLD 0 Cs-137 18 < LLD - -< LLD 0 Ba-La-140 15 < LLD - -< LLD 0 Ce-144 46 < LLD - -< LLD 0 20

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2001

( County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non Type Number of LLDb Mean (F)c Mean (F)0 Mean (F)c Routine (Units) Analysesa Range' Locationd Range0 Rangec Resultse Drinking Water GB 12 1.0 2.5 (12/12) M-14, Minneapolis 2.5 (12/12) None 0 (pCi/L) (1.6-3.3) 37.0 mi. @ 1320 /SE (1.6-3.3) 1-131 12 1.0 < LLD - - None 0 H-3 4 330 < LLD - - None 0 GS 12 Mn-54 15 < LLD - - None 0 Fe-59 30 < LLD - - None 0 Co-58 15 < LLD - - None 0 Co-60 15 < LLD - - None 0 Zn-65 30 < LLD - - None 0 Zr-Nb-95 15 < LLD - - None 0 Cs-134 10 < LLD - - None 0 Cs-137 18 < LLD - - None 0 Ba-La-140 15 < LLD - - None 0 Ce-144 50 < LLD - - None 0 Well Water H-3 16 330 < LLD - -< LLD 0 (pCi/L)

GS 16 Mn-54 15 < LLD - -< LLD 0 Fe-59 30 < LLD - -< LLD 0 Co-58 15 < LLD - -< LLD 0 Co-60 15 < LLD - -< LLD 0 Zn-65 30 < LLD - -< LLD 0 Zr-Nb-95 15 < LLD - -< LLD 0 Cs-134 10 < LLD - -< LLD 0 Cs-137 18 < LLD - -< LLD 0 Ba-La-140 15 < LLD - -< LLD 0 Ce-144 61 < LLD - -< LLD 0 Crops- Cabbage 1-131 2 0.013 < LLD - -< LLD 0 (pCi/gwet) 21

Table 5.4 Radiological Environmental Monioring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2001

( County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non Type Number of LLDb Mean (F)0 Mean (F)' Mean (F)f Routine (Units) Analysesa Rangec Locationd Range' Rangec Resultse Fish GS 4 (pCi/g wet) K-40 0.10 2.77 (2/2) M-8, < 1000' Upstream 2.87 (2/2) 2.87 (2/2) 0 (2.68-2.85) from Plant Intake (2.75-2.99) (2.75-2.99)

Mn-54 0.018 < LLD - - < LLD 0 Fe-59 0.063 < LLD - - < LLD 0 Co-58 0.013 < LLD - - < LLD 0 Co-60 0.018 < LLD - - < LLD 0 Zn-65 0.027 < LLD - - < LLD 0 Zr-Nb-95 0.049 < LLD - - < LLD 0 Cs-134 0.019 < LLD - - < LLD 0 Cs-137 0.017 0.024 (1/2) M-9, < 1000' Downstream 0.024 (112) < LLD 0 from Plant Discharge -

Ba-La-140 0.10 < LLD - - < LLD 0 Ce-144 0.11 < LLD - - < LLD 0 Invertebrates GS 2 (pCi/g wet) Be-7 2.99 < LLD - - < LLD 0 K-40 7.65 < LLD - - < LLD 0 Mn-54 0.27 < LLD - - < LLD 0 Fe-59 0.34 < LLD - - < LLD 0 Co-58 0.34 < LLD - - < LLD 0 Co-60 0.35 < LLD - - < LLD 0 Zn-65 0.61 < LLD - - < LLD 0 Zr-Nb-95 0.27 < LLD - - < LLD 0 Cs-134 0.31 < LLD - - < LLD 0 Cs-137 0.18 < LLD - - < LLD 0 Ba-La-140 0.53 < LLD - - < LLD 0 Ce-144 1.50 < LLD - - < LLD 0 22

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2001

( County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non Type Number of LLDb Mean (F)c Mean (F)c Mean (F)c Routine (Units) Analysesa Rangec Locationd Rangec Rangec Resultse Shoreline GS 6 Sediments Be-7 0.26 < LLD M-8, Upstream 0.39 (1/2) 0.39 (1/2) 0 (pCi/g dry) < 1000' from Intake K-40 0.10 10.81 (4/4) Indicators, M-9, M-15, 10.81 (4/4) 9.41 (212) 0 (10.39-11.23) identical means (10.39-11.23) (8.83-9.99)

Mn-54 0.030 < LLD - - < LLD 0 Co-58 0.030 < LLD - - < LLD 0 Co-60 0.023 < LLD - - < LLD 0 Zn-65 0.062 < LLD - - < LLD 0 Nb-95 0.034 < LLD - - < LLD 0 Zr-95 0.050 < LLD - - < LLD 0 Ru-103 0.034 < LLD - -< LLD 0 Ru-106 0.21 < LLD - -< LLD 0 Cs-1 34 0.035 < LLD - -< LLD 0 Cs-137 0.019 0.051 (4/4) M-15, Montissippi Park 0.062 (2/2) 0.030 (1/2) 0 (0.039-0.068) 1.4 mi. @ 114*/ ESE (0.055-0.068)

Ba-La-140 0.064 < LLD < LLD 0 Ce-144 0.11 < LLD < LLD 0 a GB = gross beta, GS = gamma scan.

b LLD = nominal lower limit of detection based on a 4.66 sigma counting error for background sample.

c Mean and range are based on detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (F).

dLocations are specified: (1) by name, and/or station code (Table 2) and (2) by distance (miles) and direction relative to reactor site.

8 Non-routine results are those which exceed ten times the control station value. Ifno control station value is available, the result is considered non-routine if it exceeds ten time the typical preoperational value for the medium or location.

23

6.0 REFERENCES

CITED Arnold, J. R. and H. A. AI-Salih. 1955. Beryllium-7 Produced by Cosmic Rays. Science 121: 451-453.

Eisenbud, M. 1963. Environmental Radioactivity, McGraw-Hill, New York, New York, pp. 213, 275, 276.

Environmental, Inc., Midwest Laboratory.

2002a. Radiation Environmental Monitoring for Monticello Nuclear Generating Plant, Complete Analysis Data Tables, January-December, 2000 through 2001.

2002b. Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January - December, 2000 through 2001.

2000. Quality Assurance Program Manual, Rev. 0, 11 October 2000.

2000. Quality Control Procedures Manual, Rev. 0, 21 September 2000.

2000. Quality Control Program, Rev. 0, 12 October 2000.

Gold, S., H.W. Barkhau, B. Shlein, and B. Kahn, 1964. Measurement of Naturally Occurring Radionuclides in Air, in the Natural Environment, University of Chicago Press, Illinois, 369-382.

Hazleton Environmental Sciences Corporation.

1979a through 1983a. Radiation Environmental Monitoring for Monticello Nuclear Generating Plant, Complete Analysis Data Tables, January - December 1978 through 1982.

1979b through 1983b. Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January - December 1978 through 1982.

Hohenemser, C. M. Deicher, A. Ernst, H. Hofsass, G. Lindner, E. Racknagel, 1986. "Chernobyl,"

Chemtech, October 1986, pp. 596-605.

National Center for Radiological Health, 1968. Radiological Helath and Data Reports, Vol. 9, Number 12, 730-746.

Northern States Power Company.

1969. Monticello Nuclear Generating Plant, Environmental Radiation Monitoring Program, Annual Report, June 18, 1968 to December 31, 1968. Minneapolis, Minnesota.

1970. Monticello Nuclear Generating Plant, Environmental Radiation Surveillance, Annual Report, January 1, 1969 to December 31, 1969. Minneapolis, Minnesota.

1971. Monticello Nuclear Generating Plant, Environmental Radiation Surveillance, Annual Report, January 1, 1970 to December 31, 1970. Minneapolis, Minnesota.

24

6.0 REFERENCES

CITED (continued)

Northern States Power Company.

Monticello Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1, to December 31, 1977 through 1982 (prepared by Hazleton Environmental Sciences). Minneapolis, Minnesota.

1984 through 2000. Monticello Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1 to December 31, 1983 through 1999 (prepared by Teledyne Brown Engineering Environmental Services, Midwest Laboratory). Northbrook, Illinois Teledyne Brown Engineering Environmental Services, Midwest Laboratory.

1984a to 2000a. Radiation Environmental Monitoring for Monticello Nuclear Generating Plant, Complete Analysis Data Tables, January - December, 1983 through 1999.

1984b to 2000b. Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January - December, 1983 through 1999.

U.S. Dep't of Energy 1997 HASL-300, Edition 28, Procedures Manual, Environmental Measurements Laboratory, New York, NY.

U.S. Environmental Protection Agency.

1980. Prescribed Procedures for Measurement of Radioactivity in Drinking Water, Cincinnati, Ohio (EPA-600/4-80-032).

1984. Eastern Environmental Radiation Facility, Radiochemistry Procedures Manual, Montgomery, Alabama (EPA-520/5-84-006).

Wilson, D. W., G. M. Ward and J. E. Johnson. 1969. In Environmental Contamination by Radioactive Materials, International Atomic Energy Agency. p.125.

XCEL Energy Corporation.

2002. Prairie Island Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1 to December 31, 2000 through 2001. (prepared by Environmental, Inc., Midwest Laboratory). Northbrook, Illinois 25

-". ~ Environmental, Inc.

Midwest Laboratory an Allegheny Technologies Co.

700 Landwehr Road

• Northbrook, IL 60062-2310 (847) 564-0700 fax (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, 2001 through December, 2001

Appendix A Interlaboratory 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 (e.g., milk or water) 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.

The results in Table A-1 were obtained through participation in the environmental sample crosscheck program for milk, water and air filters during the past twelve months. Data for previous years is available upon request.

This program was conducted by the U.S. Environmental Protection Agency Office of Research and Development National Exposure Research Laboratory Characterization Research Division-Las Vegas, Nevada.

The results in Table A-2 were obtained for Thermoluminescent Dosimeters (TLDs), via various International Intercomparisons of Environmental Dosimeters under the sponsorships listed in Table A-2. Results of crosscheck testing with Teledyne Brown Engineering are also listed.

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

12-31-01 ATTACHMENT A ACCEPTANCE CRITERIA FOR "SPIKED" SAMPLES LABORATORY PRECISION: ONE STANDARD DEVIATION VALUES FOR VARIOUS ANALYSES' One Standard Deviation Level for single determinations Analysis Gamma Emitters 5 to 100 pCi/liter 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 pCi/liter

> 50 pCi/liter or kg 10% of known value Strontium-90b 2 to 30 pCi/liter or kg 5.0 pCi/liter

> 30 pCi/liter or kg 10% of known value Potassium-40 > 0.1 g/liter or kg 5% of known value Gross alpha 20 pCi/liter 5.0 pCi/liter

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

> 100 pCi/liter 5% of known value Tritium 4,000 pCi/liter Is = (pCi/liter) =

169.85 x (known)0 9""

> 4,000 pCi/liter 10% of known value Radium-226,-228 0.1 pCi/liter 15% of known value Plutonium 0.1 pCi/liter, gram, or sample 10% of known value Iodine-131, 55 pCi/liter 6.0 pCi/liter Iodine-1 29b > 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 50 to 100 pCi/liter 10 pCi/liter I Iron-55b

> 100 pCi/liter 10% of known value 20% of known value Othersb From EPA publication, "Environmental Radioactivity Laboratory Intercomparison Studies Program, Fiscal Year, 1981-1982, EPA-60014-81-004.

b Laboratory limit.

A2

Table A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)'.

Concentration in pCi/Lb Lab Sample Date Control Code Type Collected Analysis Laboratory resultc ERA ResultV Limits WATER Jan, 2001 Gr. Alpha 31.9+/-2.1 45.7 +/- 11.4 25.9 - 65.5 STW-897 8.0 - 25.4 Jan, 2001 Gr. Beta 25.3 +/- 2.7 16.7 +/-5.0 STW-897 WATER 27.2 +/- 0.8 28.3+/- 3.0 23.1 - 33.5 STW-900 WATER Feb, 2001 1-131 4.0_+/- 0.1 4.7 +/- 0.7 3.4 - 5.9 STW-902 WATER Feb, 2001 Ra-226 13.8+/-0.4 14.4 +/- 3.6 8.2 - 20.6 STW-902 WATER Feb, 2001 Ra-228 17.0+/- 0.3 20.4 +/- 3.0 15.2 -25.6 STW-902 WATER Feb, 2001 Uranium WATER Mar, 2001 H-3 17,400.0 +/- 69.7 17,800.0 +/-1,780.0 14,700. - 20,900.0 STW-903 57.4 +/- 3.5 56.0 +/- 14.0 31.8-80.2 STW-917 WATER Apr, 2001 Gr. Alpha 13.5+/-0.4 17.7+/-2.7 13.1 -22.3 STW-917 WATER Apr, 2001 Ra-226 10.1 +/--0.6 8.1 +/- 2.0 4.6-11.6 STW-917 WATER Apr, 2001 Ra-228 14.2+/-0.2 15.6 +/- 3.0 10.4 - 20.8 STW-917 WATER Apr, 2001 Uranium 27.9+/-1.4 26.4 +/- 5.0 17.7- 35.1 STW-918 WATER Apr, 2001 Co-60 16.0+/-0.4 16.9 +/- 5.0 8.2 - 25.6 STW-918 WATER Apr, 2001 Cs-I 34 Cs-137 195.4+/-1.5 186.0 +/-9.3 170.0 - 202.0 STW-918 WATER Apr, 2001 340.0+/- 51.0 343.0+/-1.7 252.0 - 428.0 STW-918 WATER Apr, 2001 Gr. Beta 62.8 +/- 5.7 64.1 +/- 5.0 55.5 - 72.8 STW-918 WATER Apr, 2001 Sr-89 34.2+/-1.6 33.8 +/- 5.0 25.1 - 42.5 STW-918 WATER Apr, 2001 Sr-90 37.8 +/- 1.2 36.0 +/- 5.0 27.3 - 44.7 STW-919 WATER Jun, 2001 Ba-I 33 49.9 +/- 0.7 46.8 +/- 5.0 38.1 - 55.5 STW-919 WATER Jun, 2001 Co-60 16.0+/- 1.4 15.9 +/- 5.0 7.2 - 24.6 STW-919 WATER Jun, 2001 Cs-134 208.0+/-1.7 197.0 +/-9.9 180.0 - 214.0 STW-919 WATER Jun, 2001 Cs-1 37 37.8 +/- 0.7 36.2 +/- 5.0 27.5 - 44.9 STW-919 WATER Jun, 2001 Zn-65 14.6+/-0.4 15.4+/-2.3 11.4- 19.4 STW-920 WATER Jun, 2001 Ra-226 6.2 +/- 0.2 4.5+/- 1.1 2.6 - 6.5 STW-920 WATER Jun, 2001 Ra-228 55.7 +/- 5.6 46.1 - 65.3 WATER Jun, 2001 Uranium 49.0+/-1.0 STW-920 19.8+/- 1.5 31.2 +/- 5.0 22.5 - 39.9 STW-921 WATER Jul, 2001 Sr-89 Delay in processing may have attributed to deviation.

Result of reanalysis; Sr-89, 35.3 +/- 4.4 pCi/L. Sr-90, 25.0 +/- 2.8 pCi/L. .17.2 - 34.6 25.9 +/- 5.0 STm1-921 WATER Jul, 2001 Sr-90 26.3 +/- 1.1 17.8+/- 5.0 9.1 - 26.5 STWV-922 WATER Jul, 2001 Gr. Alpha 23.3+/-1.9 53.0+/- 10.0 35.7 - 70.3 STV/-922 WATER Jul, 2001 Gr. Beta 48.5+/- 4.6 2,730.0 +/- 356.0 2,110.0 - 3,350.0 STW/-924 WATER Aug, 2001 H-3 2,680.0+/- 41.9 10.8++/-1.6 8.0- 13.6 STW/-931 WATER Sep, 2001 Ra-226 10.9+/- 0.2 9.0 +/- 2.2 5.1 - 12.8 STW/-931 WATER Sep, 2001 Ra-228 9.7+/- 1.1 13.1 +/-3.0 7.9- 18.3 STW1-931 WATER Sep, 2001 Uranium 11.2+/-0.1 7.7 +/- 2.0 4.2-11.2 STV 1-932 WATER Oct, 2001 1-131 7.7+/-0.3 97.5 +/- 24.4 55.3- 140.0 STV/-933 WATER Oct, 2001 Gr. Alpha 82.2 +/- 4.0 1.2 10.8 +/- 1.6 8.0-13.6 S'l' /_T,1 Ra-226 9.5+/-

WATER VUJ * .... ~ 2001 Oct. I . .

Al-1

Table A-I. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.

Concentration in pCilLb Lab Sample Date Control Code Type Collected Analysis Laboratory result' ERA ResulIt Limits STW-933 WATER Oct, 2001 Ra-228 17.0+/- 0.8 15.6 +/- 3.9 8.9-22.4 STW-933 WATER Oct, 2001 Uranium 32.2 +/- 1.4 37.2 +/- 3.7 30.7 - 43.6 STW-934 WATER Oct, 2001 Co-60 82.4+/- 0.9 78.4+/- 5.0 69.7-87.1 STW-934 WATER Oct, 2001 Cs-134 52.2 +/-1.3 54.1 +/- 5.0 45.4-62.8 STW-934 WATER Oct, 2001 Cs-137 39.4+/-0.6 37.9 +/- 5.0 26.3-43.7 STW-934 WATER Oct, 2001 Gr. Beta 166.0+/-7.1 192.0 +/-28.8 142.0 - 242.0 STW-934 WATER Oct, 2001 Sr-89 12.8+/- 0.8 16.7+/-5.0 8.0- 25.4 STW-934 WATER Oct, 2001 Sr-90 6.8 +/- 0.7 7.7 +/- 5.0 -1.0 - 16.4 STW-935 WATER Oct, 2001 Gr. Alpha 63.5i 2.5 64.0+/-16.0 36.5 - 91.5 STW-935 WATER Oct, 2001 Gr. Beta 26.0+/-1.2 21.5 +/- 5.0 12.8-30.2 STW-938 WATER Nov, 2001 Ba-133 66.7+/- 1.2 69.3 +/- 6.9 57.5-81.1 STW-938 WATER Nov, 2001 Co-60 59.3 +/- 0.6 59.7 +/- 5.0 51.0 - 68.4 STW-938 WATER Nov, 2001 Cs-134 86.7+/- 1.5 93.9+/- 5.0 85.2- 103.0 STW-938 WATER Nov, 2001 Cs-137 45.0+/-1.0 42.0+/- 5.0 33.3- 50.7 STW-938 WATER Nov, 2001 Zn-65 80.7+/-0.6 77.3+/-7.7 63.9-90.7 Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the environmental samples crosscheck program operated by Environmental Resources Associates (ERA).

All results are in pCi/L, except for elemental potassium (K) data in milk, which are in mg/L; air filter samples, which are in pCi/Filter.

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

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

Al -2

Table A-2. Crosscheck program results; Thermoluminescent Dosimeters. (TLDs).

mR Lab Known Lab result Code TLD Type Date Measurement Value +/- 2 Sigma Control Limits Teledyne Brown Enqineerinq 2000-1 LiF-100 Chips Mar, 2000 Reader 1, #1 17.8 14.4+/-0.2 12.46 - 23.14 Mar, 2000 Reader 1, #2 35.5 32.4+/-0.1 24.85 - 46.15 2000-1 LiF-100 Chips Mar, 2000 Reader 1, #3 62.2 61.8 +/- 0.9 43.54 - 80.86 2000-1 LiF-100 Chips Teledyne Brown Enqineeringq 2000-2 CaSO,: Dy Cards Mar, 2000 Reader 1,#1 17.8 21.3 +/- 0.3 12.46 - 23.14 Reader 1,#2 35.5 40.1 +/-1.9 24.85 - 46.15 2000-2 CaSO,: Dy Cards Mar, 2000 Reader 1, #3 62.2 69.9 +/- 3.5 43.54 - 80.86 2000-2 CaSO,: Dy Cards Mar, 2000 of 2000.

Chips and cards irradiated by Teledyne Brown Engineering, Westwood, New Jersey, in March 12th International Intercomparison Field 161.0 184.9+/-1.9 112.70 - 209.30 022-1 CaSO,: Dy Cards Jun, 2000 Jun, 2000 Field 1 548.0 502.2+/-1.7 383.60 - 712.40 022-1 CaSO,,: Dy Cards Jun, 2000 Field 2 391.0 412.0 +/-2.9 273.70 - 508.30 022-1 CaSO,: Dy Cards Jun, 2000 Field 3 623.0 643.2 +/- 2.9 436.10 - 809.90 022-1 CaSO,: Dy Cards Jun, 2000 Lab, 1 391.0 442.8 +/- 2.5 273.70 - 508.30 022-1 CaSO4: Dy Cards Environmental, Inc.

2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1,#1 4.0 3.7+/-0.1 2.79- 5.17 Dec, 2001 Reader 1, #1 4.0 3.4+/-0.1 2.79 - 5.17 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #2 7.1 7.9+/-0.2 4.95-9.19 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #2 7.1 7.6+/-0.3 4.95- 9.19 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #3 15.9 18.6+/-0.4 11.13 - 20.67 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #3 15.9 19.6+/-0.1 11.13- 20.67 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #4 63.6 78.2 +/- 1.2 44.53 - 82.69 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #4 63.6 79.9 +/- 2.5 44.53 - 82.69 2001-1 CaSO,: Dy Cards A2-1

Table A-3. In-house "spike" samples.

Concentration in pCi/La Lab Sample Date Laboratory results Known Controlc Code Type Collected Analysis 2s, n=lb Activity Limits SPAP-477 Air Filter Jan, 2001 Cs-137 1.76+/-0.02 1.68 1.01 - 2.35 SPW-479 Water Jan, 2001 H-3 54702.00 +/- 644.00 54549.00 43639.20 - 65458.80 Water Jan, 2001 Gr. Alpha 58.08+/-2.79 69.14 34.57 - 103.71 SPW-481 SPW-481 Water Jan, 2001 Gr. Beta 213.83+/-3.07 220.26 198.23 - 242.29 SPW-482 Water Jan, 2001 Gr. Alpha 51.77 +/- 2.18 69.14 34.57 - 103.71 Water Jan, 2001 Gr. Beta 202.48 +/-2.98 220.26 198.23 - 242.29 SPW-482 Water Jan, 2001 Ra-226 20.11 +/-0.34 20.86 14.60 - 27.12 SPW-483 Water Jan, 2001 Ra-228 10.55+/-2.02 19.43 13.60 - 25.26 SPW-483 Sample was lost during analysis. Insufficient sample available to perform reanalysis.

Water Jan, 2001 Co-60 33.53+/-3.40 31.13 21.13-41.13 SPW-485 Water Jan, 2001 Cs-1 34 32.80+/-2.54 30.81 20.81 - 40.81 SPW-485 Water Jan, 2001 Cs-1 37 42.10+/-5.60 36.00 26.00 - 46.00 SPW-485 Water Jan, 2001 Sr-90 154.34 +/- 3.49 137.66 110.13 - 165.19 SPW-485 Air Filter Jan, 2001 Gr. Beta 8.53 +/- 0.02 7.88 -2.12 - 17.88 SPAP-754 Water Feb, 2001 U-233/4 3.74+/-0.10 4.17 2.50 - 5.84 SPW-1 037 Water Feb, 2001 U-238 3.81 +/-0.10 4.17 -7.83- 16.17 SPW-1037 Water Feb, 2001 Ra-226 21.25+/-0.50 20.68 14.48 - 26.88 SPW-1224 Water Feb, 2001 Ra-228 21.76+/-2.65 19.27 13.49 - 25.05 SPW-1224 Water Feb, 2001 Gr. Alpha 71.87+/-3.07 69.14 34.57 - 103.71 SPW-1225 Water Feb, 2001 Gr. Beta 36.30+/-1.47 28.75 18.75 - 38.75 SPW-1225 Water Feb, 2001 1-131 56.82+/- 0.71 63.05 50.44 - 75.66 SPW-1272 Water Feb, 2001 1-131(g) 65.69+/-10.21 63.05 53.05 - 73.05 SPW-1272 Vegetation Feb, 2001 1-131(g) 0.78+/-0.05 0.76 0.45 -'1.06 SPVE-1274 Charcoal Feb, 2001 1-131(g) 1.57 +/-0.05 1.58 0.95 - 2.21 SPCH-1 276 Milk Mar, 2001 Cs-134 31.89 +/-4.71 29.77 19.77 - 39.77 SPMI-1270 Milk Mar, 2001 Cs-1 37 46.61 +/-8.81 35.90 25.90 - 45.90 SPM1-1270 PMI-3232.

The Cs-137 spike is sus pect; A new cesium spike has been prepared. Reference to S Milk Mar, 2001 1-131(g) 81.92+/-10.80 81.95 71.95 - 91.95 SPMI-1270 Urine Mar, 2001 H-3 51512.00+/-1369.00 50189.00 40151.20 - 60226.80 SPU-2901 Water Mar, 2001 Ra-228 29.92+/- 5.13 31.75 22.23 - 41.28 SPW-2161 Urine Apr, 2001 H-3 2065.00+/-408.00 2008.00 1317.37 - 2698.63 SPU-3128 Water Apr, 2001 Gr. Alpha 37.94+/- 2.42 34.57 17.29 - 51.86 SPW-3129 A3-1

Table A-3. In-house "spike" samples.

Concentration in pCi/L2 Lab Sample Date Laboratory results Known Controlc Code Type Collected Analysis 2s, n=lb Activity Limits Water Apr, 2001 Gr. Beta 117.83 +/- 2.37 109.46 98.51 - 120.41 SPW-3129 Apr, 2001 Gr. Beta 0.80 +/- 0.01 0.78 -9.22 - 10.78 SPAP-3508 Air Filter Milk Apr, 2001 Cs-134 32.69 +/- 6.50 33.96 23.96 - 43.96 SPMI-3232 Apr, 2001 Cs-1 37 44.20 +/- 9.08 35.79 25.79 - 45.79 SPMI-3232 Milk Apr, 2001 1-131 48.05 +/- 0.90 56.68 45.34 - 68.02 SPMI-3232 Milk Apr, 2001 1-131(g) 55.64 +/- 11.39 56.68 46.68 - 66.68 SPMI-3232 Milk Apr, 2001 Sr-90 143.77 +/- 3.04 136.82 109.46 - 164.18 SPMI-3232 Milk Apr, 2001 Co-60 18.49 +/- 0.21 19.57 9.57 - 29.57 SPSO-3356 Soil Apr, 2001 Cs-1 37 18.71 +/-0.24 16.61 6.61 - 26.61 SPSO-3356 Soil Apr, 2001 Cs-1 37 1.80 +/- 0.01 1.67 1.00-2.34 SPAP-3359 Air Filter Apr, 2001 Co-60 48.17+/-4.85 45.19 35.19 - 55.19 SPW-3376 Water Apr, 2001 Cs-134 37.14+/- 3.90 33.96 23.96 - 43.96 SPW-3376 Water Apr, 2001 Sr-90 159.84 +/- 3.42 136.82 109.46 - 164.18 SPW-3376 Water Apr, 2001 1-131 68.60 +/- 2.63 85.02 68.02 - 102.02 SPW-3377 Water May, 2001 Gr. Alpha 37.94 +/- 2.42 34.57 17.29 - 51.86 SPW-3129/1 Water May, 2001 Gr. Beta 117.83 +/- 2.37 109.46 98.51 - 120.41 SPW-3129/1 Water Jun, 2001 Gr. Alpha 34.42 +/- 2.14 34.57 17.29 - 51.86 SPW-3129/2 Water Jun, 2001 Gr. Beta 119.99 +/-2.45 109.46 98.51 - 120.41 SPW-3129/2 Water Jun, 2001 1-131(g) 0.81 +/- 0.03 0.86 0.51 -1.20 SPVE-3303 Vegetation Jul, 2001 Co-60 17.42 +/-0.19 19.05 9.05 - 29.05 SPSO-5701 Soil Jul, 2001 Cs-137 16.03 +/- 0.22 16.52 6.52 - 26.52 SPSO-5701 Soil Jul, 2001 Co-60 250.05 +/- 18.63 233.26 209.93 - 256.59 SPW-5779 Water Jul, 2001 Cs-137 178.68 +/- 19.89 175.91 158.32 -'193.50 SPW-5779 Water Jul, 2001 Sr-90 72.12+/- 2.24 68.12 54.50 - 81.74 SPW-5779 Water Jul, 2001 Co-60 1.87 +/- 0.08 1.79 1.07-2.51 SPF-5781 Fish Jul, 2001 Cs-1 37 1.43 +/- 0.07 1.39 0.83 - 1.95 SPF-5781 Fish Water Jul, 2001 H-3 51177.00 +/- 631.00 50189.00 40151.20 - 60226.80 SPW-5937 Jul, 2001 Ra-226 36.62 +/-1.74 34.46 24.12 - 44.80 SPW-59441 Water Jul, 2001 Ra-228 41.46 +/- 6.44 36.06 25.24 - 46.88 SPW-59441 Water Jul, 2001 Cs-137 1.81 +/- 0.02 1.67 1.00-2.34 SPAP-5703 Air Filter Jul, 2001 Gr. Alpha 35.31 +/- 3.04 34.75 17.38 - 52.13 SPW-3129/3 Water A3-2

Table A-3. In-house "spike" samples.

Concentration in pCi/La Lab Sample Date Laboratory results Known Control' Code Type Collected Analysis 2s, n=lb Activity Limits SPW-3129/3 Water Jul, 2001 Gr. Beta 113.28+/-3.65 109.46 98.51 - 120.41 SPMI-6145 Milk Jul, 2001 Cs-137 188.45+/-19.10 175.91 158.32 - 193.50 SPW-6604 Water Jul, 2001 Gr. Alpha 35.36 +/- 1.94 34.57 17.29 - 51.86 SPW-6604 Water Jul, 2001 Gr. Beta 112.56 +/-2.46 108.82 97.94 - 119.70 SPW-9008 Water Oct, 2001 H-3 48285.00+/-606.10 50189.00 40151.20-60226.80 SPAP-9010 Air Filter Oct, 2001 Cs-137 1.91 +/- 0.01 1.67 1.00 -2.34 SPW-10723 Water Dec, 2001 U-233/4 40.12+/-1.09 41.73 25.04 - 58.42 SPW-1 0723 Water Dec, 2001 U-238 40.16+/-1.09 41.73 29.21 - 54.25 SPAP-11550 Air Filter Dec, 2001 Gr. Beta 1.58 +/- 0.02 1.56 -.8.44 - 11.56 SPW-11757 Water Dec, 2001 Co-60 43.82+/-3.14 41.36 31.36 - 51.36 SPW-11757 Water Dec, 2001 Cs-134 24.11 +/- 2.42 22.59 12.59 - 32.59 SPW-1 1757 Water Dec, 2001 Cs-137 52.11 +/-4.40 50.89 40.89 - 60.89 SPMI-11759 Milk Dec, 2001 Cs-134 28.03+/-2.64 27.10 17.10 - 37.10 SPMI-11759 Milk Dec, 2001 Cs-137 54.59+/- 5.08 50.89 40.89 - 60.89 SPF-11761 Fish Dec, 2001 Cs-134 0.94+/- 0.02 0.90 0.54- 1.26 SPF-11761 Fish Dec, 2001 Cs-137 1.43+/- 0.04 1.43 0.86-2.00 "aAll results are in pCi/L, except for elemental potassium (K) in milk, which are in mg/L.; air filter samples, which are in pCi/Filter; and food products, which are in pCi/kg.

b Results are based on single determinations.

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

NOTE: For fish, Jello is used for the spike matrix. For vegetation, coleslaw is used for the spike matrix.

A3-3

Table A-4. In-house "blank" samples.

Concentration pCi/LU.

Laboratory results Acceptance Sample Sample (4.66 Sigma) Criteria Lab Code Type Date Analysis LLD Activityb (4.66 Sigma)

SPAP-478 AIR FILTER Jan 2001 Co-60 < 1.12 <100.0 SPAP-478 AIR FILTER Jan 2001 Cs-1 34 < 1.66 <100.0 SPAP-478 AIR FILTER Jan 2001 Cs-1 37 < 2.46 <100.0 SPW-480 WATER Jan 2001 H-3 < 162.00 -1.86 +/-80.40 <200.0 SPW-484 WATER Jan 2001 Gr. Alpha < 0.68 <1.0 SPW-484 WATER Jan 2001 Gr. Beta < 1.35 <3.2 SPW-484 WATER Jan 2001 Ra-226 < 0.02 0.03 +/-0.01 <1.0 SPW-484 WATER Jan 2001 Ra-228 < 0.97 0.43 +/- 0.50 <2.0 SPW-486 WATER Jan 2001 Co-60 < 2.68 <10.0 SPW-486 WATER Jan 2001 Cs- 134 < 3.46 <10.0 SPW-486 WATER Jan 2001 Cs-1 37 < 5.43 <10.0 SPW-486 WATER Jan 2001 Sr-90 < 0.65 0.06 +/- 0.31 <1.0 SPAP-755 AIR FILTER Jan 2001 Gr. Beta < 1.60 0.16 +/-0.90 <3.2 SPW-1038 WATER Feb 2001 U-238 < 0.03 <1.0 SPW-1038 WATER Feb 2001 U-238 < 0.00 <1.0 SPW-1223 WATER Feb 2001 Gr. Alpha < 0.46 <1.0 SPW-1223 WATER Feb 2001 Gr. Beta < 1.50 <3.2 SPW-1223 WATER Feb 2001 Ra-226 < 0.02 0.03 +/-0.01 <1.0 SPW-1223 WATER Feb 2001 Ra-228 < 0.95 0.45 +/- 0.49 <2.0 SPMI-1268 MILK Feb 2001 Cs-1 34 < 5.86 <10.0 SPMI-1268 MILK Feb 2001 Cs-137 < 3.02 <10.0 SPMI-1268 MILK Feb 2001 1-131(g) < 7.46 <20.0 SPW-1 271 WATER Feb 2001 Co-60 < 1.06 <10.0 SPW-1271 WATER Feb 2001 Cs- 134 < 2.61 <10.0 SPW-1 271 WATER Feb 2001 Cs-1 37 < 2.37 <10.0 SPVE-1273 VEGETATION Feb 2001 Cs-134 < 10.04 <100.0 SPVE-1273 VEGETATION Feb 2001 Cs-137 < 6.00 <100.0 SPCH-1275 CHARCOAL Feb 2001 1-131(g) < 0.01 <9.6 CANISTER SPW-2164 WATER Mar 2001 Ra-226 < 0.02 0.05 +/- 0.01 <1.0 Apr 2001 H-3 < 642.00 -66.00 +/- 335.00 <200.0 SPU-3126 URINE 2.0 ml. sample volume.

A4-1

Table A-4. In-house "blank" samples.

Concentration pCi/La.

Laboratory results Acceptance Lab Sample Sample (4.66 Sigma) Criteria Code Type Date Analysis LLD Activity' (4.66 Sigma)

SPDW-3130 WATER Apr 2001 Gr. Alpha < 0.54 0.04 +/- 0.38 <1.0 SPDW-3130 WATER Apr 2001 Gr. Beta < 1.46 0.67 +/- 1.04 <3.2 MILK Apr2001 Cs-137 < 2.66 <10.0 SPMI-3233 MILK Apr2001 1-131 < 0.26 -0.06 +/-0.14 <0.5 SPMI-3233 MILK Apr2001 1-131(g) < 3.91 <20.0 SPMI-3233 MILK Apr2001 Sr-89 < 0.79 -0.32 +/- 0.79 <5.0 SPMI-3233 MILK Apr2001 Sr-90 1.18 +/-0.35 <1.0 SPMI-3233 Low levels of Sr-90 are still detected in the environment. A concentration of (1-5 pCi/L) in milk is not unusual.

Cs-1 34 < 14.77 - <100.0 SPSO-3357 SOIL Apr 2001 SPSO-3357 SOIL Apr 2001 Cs-1 37 < 11.72 <100.0 SPAP-3358 AIR FILTER Apr 2001 Cs-137 < 0.55 <100.0 WATER Apr 2001 Co-60 < 2.90 <10.0 SPW-3375 SPW-3375 WATER Apr 2001 Cs-134 < 3.71 <10.0 WATER Apr 2001 1-131(g) < 0.39 0.02 +/- 0.22 <20.0 SPW-3375 WATER Apr 2001 Sr-90 < 0.56 0.05 +/- 0.27 <1.0 SPW-3375 WATER May 2001 Gr. Alpha < 0.45 0.15 +/- 0.34 <1.0 SPDW-3130 WATER May 2001 Gr. Beta < 1.26 0.34 +/- 0.95 <3.2 SPDW-3130 WATER Jun 2001 Gr. Alpha < 0.44 0.09 +/- 0.32 <1.0 SPDW-3130 WATER Jun 2001 Gr. Beta < 1.46 0.66 +/- 1.04 <3.2 SPDW-3130 VEGETATION Jun 2001 Co-60 < 7.06 <100.0 SPVE-3304 VEGETATION Jun 2001 Cs-1 34 < 11.56 <100.0 SPVE-3304 VEGETATION Jun 2001 Cs-137 < 8.30 <100.0 SPVE-3304 SOIL Jul 2001 Co-60 < 12.80 <100.0 SPSO-5702 SOIL Jul 2001 Cs-1 34 < 13.96 <100.0 SPSO-5702 SOIL Jul 2001 Cs-1 37 <8.10 <100.0 SPSO-5702 AIR FILTER Jul 2001 Co-60 < 0.79 <100.0 SPAP-5704 AIR FILTER Jul 2001 Cs-1 34 < 0.84 <100.0 SPAP-5704 AIR FILTER Jul 2001 Cs-1 37 < 0.60 <100.0 SPAP-5704 WATER Jul 2001 Co-60 < 1.86 <10.0 SPW-5780 WATER Jul 2001 Cs-1 34 < 2.46 <10.0 SPW-5780 WATER Jul 2001 Cs-1 37 < 3.77 <10.0 SPW-5780 A4-2

Table A-4. In-house "blank" samples.

Concentration pCi/LU.

Laboratory results Acceptance Lab Sample Sample (4.66 Sigma) Criteria Code Type Date Analysis LLD Activityb (4.66 Sigma)

SPF-5782 FISH Jul 2001 Co-60 < 5.64 <100.0 SPF-5782 FISH Jul 2001 Cs-1 34 < 7.51 <100.0 SPW-5938 WATER Jul 2001 H-3 < 163.22 -16.21 +/-85.07 <200.0 SPW-59451 WATER Jul 2001 Ra-226 < 0.01 0.04 +/- 0.01 <1.0 SPW-59451 WATER Jul 2001 Ra-228 < 0.77 0.70 +/- 0.44 <2.0 SPDW-3130 WATER Jul 2001 Gr. Alpha

• 0.54 0.36 +/- 0.40 <1.0 SPDW-3130 WATER Jul 2001 Gr. Beta < 2.27 -0.78 +/- 1.35 <3.2 SPMI-6146 MILK Jul 2001 Sr-90 < 0.50 1.09 +/- 0.36 <1.0 Low levels of Sr-90 are still detected in the environment. A concentration of (1-5 pCi/L) in milk is not unusual.

SPW-6605 WATER Jul 2001 Gr. Beta < 1.34 0.55 +/- 1.01 <3.2 SPW-9009 WATER Oct 2001 H-3 < 160.00 -56.70 +/- 76.50 <200.0 SPAP-9011 AIR FILTER Oct 2001 Co-60 < 0.76 <100.0 SPAP-9011 AIR FILTER Oct 2001 Cs-137 < 0.58 <100.0 SPW-5780 WATER Oct 2001 Sr-90 < 0.54 0.36 +/- 0.30 <1.0 SPW-1 0724 WATER Dec 2001 U-238 <0.13 0.04 +/-0.10 <1.0 SPAP-11549 AIR FILTER Dec 2001 Gr. Beta < 0.00 0.01 +/- 0.00 <3.2 SPW-1 1756 WATER Dec 2001 Cs-137 < 2.62 <10.0 SPM1-11758 MILK Dec 2001 Cs-137 < 4.00 <10.0 SPMI-1 1758 MILK Dec 2001 1-131(g) < 16.57 <20.0 SPF-1 1760 FISH Dec 2001 Cs-1 37 < 7.96 <100.0 "aLiquid sample results are reported in pCi/Liter, air filter sample results are in pCi/filter, charcoal sample results are in pCi/charcoal, and solid sample results are in pCi/kilogram.

" The activity reported is the net activity result.

A4-3

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged

+~

nJVJa Codes U Analysis rKtsUit mesful L Resultl AP-10675, 10676 Jan, 2001 Be-7 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.01 AP-10803,10804 Jan, 2001 Be-7 0.04 +/- 0.01 0.04 +/- 0.01 0.04 +/- 0.01 AP-10833, 10834 Jan, 2001 Be-7 0.04 +/- 0.01 0.04 +/- 0.01 0.04 +/- 0.01 WW-51, 52 Jan, 2001 H-3 362.60 +/- 94.70 417.20 +/- 96.80 389.90 +/- 67.71 MI-72, 73 Jan, 2001 K-40 1,566.90 +/- 196.80 1,372.40 +/- 152.50 1,469.65+/-124.49 MI-96, 97 Jan, 2001 K-40 1,418.30+/-117.80 1,545.70 +/- 162.50 1,482.00 +/- 100.35 U-858, 859 Jan, 2001 Gr. Beta 2.17+/-2.47 4.23 +/- 2.74 3.20 +/- 1.84 MI-389, 390 Jan, 2001 K-40 1,489.20+/-141.10 1,463.30 +/- 168.20 1,476.25 +/- 109.77 DW-879, 880 Jan, 2001 Gr. Beta 2.63 +/- 0.52 2.37 +/- 0.50 2.50 +/- 0.36 SWU-813, 814 Jan, 2001 Gr. Beta 2.48 +/- 0.58 2.46 +/- 0.63 2.47 +/- 0.43 MI-708, 709 Feb, 2001 K-40 1,179.40+/-103.00 1,280.40 +/- 90.26 1,229.90 +/- 68.48 MI-740, 741 Feb, 2001 1-131 0.01 +/- 0.26 -0.12+/- 0.26 -0.05+/-0.18 MI-740, 741 Feb, 2001 K-40 1,434.00+/-156.50 1,435.00+/-126.10 1,434.50 +/- 100.49 MI-789, 790 Feb, 2001 K-40 1,584.30 +/- 158.80 1,390.70+/-136.50 1,487.50+/-104.70 DW-901, 902 Feb, 2001 Gr. Beta 4.67 +/- 1.08 5.54 +/-1.13 5.11 +/-0.78 SWU-1544, 1545 Feb, 2001 Gr. Beta 3.13+/- 0.63 2.33 +/- 0.52 2.73 +/- 0.41 DW-1426, 1427 Feb, 2001 Gr. Beta 2.05 +/- 0.92 2.34 +/- 0.93 2.20 +/- 0.65 DW-1426, 1427 Feb, 2001 H-3 42.60 +/- 94.23 131.31 +/-95.34 86.96 +/- 67.02 WW-1476, 1477 Feb, 2001 H-3 53.06 +/- 65.79 53.06 +/- 93.03 53.06 +/- 56.97 MI-1523, 1524 Mar, 2001 1-131 -0.01 +/- 0.20 -0.10+/-0.37 -0.06 +/- 0.21 MI-1523, 1524 Mar, 2001 K-40 1,396.00+/-184.80 1,576.00 +/- 184.90 1,486.00 +/-130.71 MI-1572, 1573 Mar, 2001 K-40 1,499.20+/- 113.30 1,326.00 +/- 118.80 1,412.60 +/- 82.08 MI-1572, 1573 Mar, 2001 Sr-90 1.65 +/- 0.44 1.51 +/- 0.52 1.58 +/- 0.34 SW-1648, 1649 Mar, 2001 K-40 297.80 +/- 67.20 344.80 +/- 82.30 321.30 +/- 53.13 MI-1800, 1801 Mar, 2001 K-40 1,425.80 +/-183.30 1,372.20 +/- 119.70 1,399.00 +/-109.46 SW-1779, 1780 Mar, 2001 Gr. Alpha 2.22 +/- 0.73 2.14 +/-0.69 2.$8 +/-0.50 SW- 779, 1780 Mar, 2001 Gr. Beta 6.28 +/- 0.74 6.62 +/- 0.70 6.45 +/- 0.51 MI-1447, 1448 Mar, 2001 1-131 -0.65 +/- 0.27 0.13+/-0.55 -0.26 +/- 0.31 MI-1447, 1448 Mar, 2001 K-40 1,496.20 +/-155.40 1,413.40+/-169.60 1,454.80 +/- 115.01 WW-2115, 2116 Mar, 2001 H-3 540.04+/- 111.84 500.85+/-110.46 520.44 +/- 78.59 SW-1698, 1699 Mar, 2001 Gr. Beta 6.07+/-1.75 5.57+/-,1.85 5.82 +/- 1.27 DW-2272, 2273 Mar, 2001 Gr. Beta 2.10+/- 0.86 1.63+/-0.83 1.87 +/- 0.60 WW-2356, 2357 Mar, 2001 Gr. Beta 1.22 +/- 0.50 1.32+/- 0.47 1.27 +/- 0.35 AP-2812, 2813 Mar, 2001 Be-7 0.07 +/- 0.02 0.05 +/- 0.01 0.06 +/- 0.01 AP-2812, 2813 Mar, 2001 Be-7 0.07 +/- 0.02 0.05 +/- 0.01 0.06 +/- 0.01 LW-2217, 2218 Mar, 2001 Gr. Beta 1.85 +/- 0.51 2.23 +/- 0.55 2.04 +/- 0.37 A5-1

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged n.UI 4 1 Uif Codes ca V Analysis rxzou L Keul U rO u AP-2833, 2834 Mar, 2001 Be-7 0.04 +/- 0.01 0.06 +/- 0.02 0.05 +/- 0.01 Mar, 2001 Be-7 0.07 +/- 0.02 0.07 +/- 0.02 0.07 +/- 0.01 AP-3038, 3039 Mar, 2001 Be-7 0.06 +/- 0.02 0.07 +/- 0.01 0.07 +/- 0.01 AP-3038, 3039 Mar, 2001 Gr. Beta 1.58 +/- 0.89 1.81 +/- 0.88 1.69 +/-0.63 DW-2398, 2399 Mar, 2001 Gr. Beta 2.52 +/- 0.53 2.42 +/- 0.53 2.47 +/- 0.37 LW-2467, 2468 Apr, 2001 K-40 1,285.40+/-177.10 1,376.00+/-175.90 1,330.70+/-124.81 MI-2446, 2447 Apr, 2001 Be-7 0.05 +/- 0.01 0.05 +/- 0.01 0.05 +/- 0.00 AP-3017, 3018 Apr, 2001 K-40 255.60 +/- 59.80 268.40 +/- 65.40 262.00 +/- 44.31 SW-2423, 2424 Apr, 2001 Gr. Beta 7.99+/-1.80 8.17 +/-1.73 8.08+/-1.25 BS-3103, 3104 Apr, 2001 Gr. Beta 3.30 +/- 0.60 4.30 +/- 0.74 3.80 +/- 0.48 SWU-3239, 3240 Apr, 2001 K-40 15.99 +/- 1.08 15.59 +/- 1.01 15.79+/-0.74 SS-3322, 3323 Apr, 2001 Sr-89 91.35+/-18.94 85.29 +/- 23.99 88.32+/- 15.28 W-3990, 3991 Apr, 2001 K-40 3,982.40 +/- 489.60 3,255.80 +/- 450.10 3,619.10 +/- 332.53 BS-4347, 4348 Apr, 2001 K-40 3.26 +/- 0.45 3.98 +/- 0.49 3.62 +/- 0.33 BS-4347, 4348 May, 2001 K-40 1,325.90 +/- 160.20 1,453.20+/-163.00 1,389.55 +/- 114.27 MI-3364, 3365 May, 2001 Gr. Alpha 6.51 +/-3.09 9.01 +/- 3.44 7.76 +/- 2.31 SO-3385, 3386 May, 2001 Gr. Beta 24.63 +/- 3.15 28.17+/- 3.12 26.40 +/- 2.22 SO-3385, 3386 May, 2001 K-40 19.17+/- 1.08 17.94 +/- 0.76 18.56 +/- 0.66 SO-3385, 3386 May, 2001 K-40 1.09 +/- 0.27 1.13+/- 0.23 1.11+/-0.18 CL-4068, 4069 May, 2001 Gr. Beta 1,297.10+/-114.60 1,433.60 +/-156.60 1,365.35 +/- 97.03 MI-3475, 3476 May, 2001 Gr. Beta 1.57 +/- 0.55 1.36 +/- 0.53 1.47 +/- 0.38 WW-3545, 3546 May, 2001 K-40 1,417.20+/-125.70 1,496.20+/-124.50 1,456.70 +/- 88.46 MI-3681, 3682 May, 2001 Gr. Alpha 4.51 +/-1.66 3.22 +/- 1.55 3.87 +/- 1.13 SW-3702, 3703 May, 2001 Gr. Beta 8.74 +/- 1.36 7.11 +/-1.38 7.93 +/- 0.97 SW-3702, 3703 May, 2001 Cs-1 37 224.30 +/- 30.20 205.90 +/- 43.00 215.10 +/-26.27 BS-4021, 4022 BS-4021, 4022 May, 2001 H-3 842.00 +/- 47.00 860.00 +/- 48.00 851.00 +/- 33.59 BS-4021, 4022 May, 2001 K-40 21,117.00 +/- 953.00 21,629.00+/-1,357.00 21,373.00 +/-829.10 May, 2001 Pu-238 80.30 +/- 36.50 59.50 +/- 22.00 69.90 +/- 21.31 BS-4021, 4022 May, 2001 Pu-239/40 49.40 +/- 31.80 41.10+/- 19.60 45.25+/-18.68 BS-4021, 4022 May, 2001 Ra-226 7,436.00 +/- 577.90 9,126.00 +/- 751.90 8,281.00+/-474.16 BS-4021, 4022 May, 2001 Sr-90 10.60 +/- 2.71 16.80 +/- 3.22 13.70+/-2.10 BS-4021, 4022 May, 2001 K-40 2.10+/-0.17 2.30 +/- 0.26 2.20+/-0.16 F-3813, 3814 May, 2001 Be-7 0.37+/- 0.13 0.41 +/-0.14 0.39+/-0.10 G-4158, 4159 May, 2001 Ac-228 0.45+/-0.13 0.52+/-0.14 0.49+/- 0.10 SO-4179, 4180 May, 2001 Bi-214 0.31 +/- 0.06 0.41 +/- 0.06 0.36 +/- 0.04 SO-4179, 4180 May, 2001 Cs-137 0.46 +/- 0.05 0.47 +/- 0.04 0.47 +/- 0.03 SO-4179, 4180 A5-2

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged ZW rXWCOU Codes 0J=

L Analysis SO-4179, 4180 May, 2001 Gr. Beta 26.65 +/- 2.63 24.68+/-2.52 25.67 +/- 1.82 May, 2001 K-40 16.35+/- 0.86 16.05 +/- 0.82 16.20 +/- 0.59 SO-4179, 4180 May, 2001 Pb-212 0.35 +/- 0.04 0.43 +/- 0.05 0.39 +/- 0.03 SO-4179, 4180 May, 2001 Ra-226 0.56 +/- 0.98 1.03 +/- 0.31 0.79 +/- 0.51 SO-4179, 4180 May, 2001 TI-208 0.14+/-0.03 0.17+/- 0.03 0.15+/-0.02 SO-4179, 4180 May, 2001 Cs-1 37 0.03 +/- 0.01 0.03 +/- 0.02 0.03 +/- 0.01 BS-4233, 4234 May, 2001 K-40 8.18+/-0.48 7.80 +/- 0.58 7.99 +/- 0.38 BS-4233, 4234 May, 2001 Gr. Beta 2.58 +/- 0.55 2.94 +/- 0.58 2.76 +/- 0.40 SWU-4376, 4377 May, 2001 Gr. Beta 2.83 +/- 0.55 3.74 +/-0.65 3.29 +/- 0.43 DW-4449, 4450 May, 2001 Gr. Beta 9.13+/-1.26 10.20+/-1.34 9.66 +/- 0.92 DW-4397, 4398 May, 2001 K-40 1,325.90 +/- 118.80 1,394.70 +/-133.10 1,360.30 +/- 89.20 MI-4114, 4115 May, 2001 K-40 2.23 +/- 0.32 2.12 +/-0.35 2.18 +/-0.24 F-4284, 4285 Jun, 2001 Gr. Beta 2.60 +/- 0.97 1.47 +/- 0.83 2.04 +/- 0.64 DW-4326, 4327 Jun, 2001 K-40 1,514.50+/-116.60 1,456.80+/-130.90 1,485.65 +/- 87.65 MI-4470, 4471 Jun, 2001 Gr. Beta 4.05+/-1.23 4.64+/-1.32 4.35 +/- 0.90 SW-4493, 4494 Jun, 2001 Co-60 112.00 +/-24.30 84.50 +/- 8.70 98.25+/- 12.91 BS-4725, 4726 Jun, 2001 Cs-137 3,083.10+/-100.10 3,094.80 +/- 35.30 3,088.95 +/- 53.07 BS-4725, 4726 BS-4725, 4726 Jun, 2001 K-40 8,143.70 +/- 640.40 8,083.80 +/- 225.10 8,113.75 +/- 339.40 Jun, 2001 K-40 1,362.20 +/- 71.80 1,363.90 +/-73.40 1,363.05 +/- 51.34 MI-4775, 4776 WW-5110, 5111 Jun, 2001 H-3 1,173.50+/-129.10 1,046.80+/-125.20 1,110.15+/- 89.92 Jun, 2001 Be-7 0.89+/-0.17 1.14+/-0.39 1.02 +/- 0.21 G-5085, 5086 Jun, 2001 K-40 5.13+/-0.39 5.22 +/- 0.70 5.17+/-0.40 G-5085, 5086 MI-5259, 5260 Jun, 2001 K-40 1,529.70+/-122.70 1,406.20+/-123.80 1,467.95+/-87.15 Jun, 2001 Sr-90 1.69 +/- 0.42 1.71 +/-0.44 1.70 +/- 0.30 MI-5259, 5260 Jun, 2001 Gr. Beta 2.59 +/- 0.54 1.91 +/- 0.52 2.25 +/- 0.37 SWU-5422, 5423 Jun, 2001 Gr. Beta 8.12+/- 0.24 8.88 +/- 0.26 8.50+/-0.18 VE-5401, 5402 Jun, 2001 K-40 6.55 +/- 0.52 6.26 +/- 0.65 6.40 +/- 0.42 VE-5401, 5402 Jun, 2001 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 AP-5830, 5831 Jun, 2001 Gr. Beta 5.43+/-1.70 5.96 +/- 1.56 5.70+/- 1.15 SW-5557, 5558 Jun, 2001 Be-7 0.07 +/- 0.02 0.07 +/- 0.02 0.07 +/- 0.01 AP-5851, 5852 Jun, 2001 Gr. Beta 4.75+/-1.38 4.18+/- 1.34 4.47 +/- 0.96 SW-5636, 5637 Jun, 2001 Gr. Beta 2.42 +/- 0.37 2.18 +/-0.34 2.30 +/- 0.25 LW-5681, 5682 Jul, 2001 Be-7 0.99 +/- 0.29 0.97 +/- 0.54 0.98 +/- 0.31 G-5535, 5536 Jul, 2001 Gr. Beta 7.62+/-0.12 7.72 +/-0.12 7.67 +/- 0.08 G-5535, 5536 Jul, 2001 K-40 7.26+/-1.03 7.64 +/- 0.93 7.45+/-0.69 G-5535, 5536 Jul, 2001 Be-7 0.08 +/- 0.02 0.07 +/- 0.02 0.08 +/- 0.01 AP-5788, 5789 A5-3

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Sample Lab First Second Averaged Date Result Result Result Codes Analysis AP-5872, 5873 Jul, 2001 Be-7 0.07 +/- 0.02 0.08 +/- 0.02 0.07 +/- 0.01 Jul, 2001 Be-7 0.08 +/- 0.02 0.08 +/- 0.01 0.08 +/- 0.01 AP-5893, 5894 AP-5809, 5810 Jul, 2001 Be-7 0.07 +/- 0.02 0.06 +/- 0.01 0.06 +/- 0.01 Jul, 2001 Gr. Alpha 2.95 +/- 0.70 2.89 +/- 0.60 2.92 +/- 0.46 SW-5724, 5725 Jul, 2001 Gr. Beta 8.79 +/- 0.71 8.21 +/- 0.65 8.50 +/- 0.48 SW-5724, 5725 SW-5767, 5768 Jul, 2001 1-131 0.79 +/- 0.31 0.61 +/- 0.26 0.70 +/- 0.20 Jul, 2001 Gr. Beta 3.06 +/- 0.64 3.15+/-0.58 3.11 +/-0.43 LW-5920, 5921 SO-6172, 6173 Jul, 2001 Cs-137 0.30 +/- 0.05 0.32 +/- 0.04 0.31 +/-0.03 SO-6172, 6173 Jul, 2001 K-40 18.20 +/- 1.08 17.55 +/- 0.82 17.88 +/- 0.68 SO-6172, 6173 Jul, 2001 Sr-90 0.03 +/- 0.01 0.05 +/- 0.02 0.04 +/- 0.01 MI-6353, 6354 Jul, 2001 K-40 966.35 +/- 82.28 986.31 +/-91.91 976.33 +/- 61.68 SW-6376, 6377 Jul, 2001 1-131 0.58+/-0.16 0.81 +/- 0.17 0.70+/- 0.12 Jul, 2001 Gr. Beta 2.52 +/- 0.05 2.49 +/- 0.05 2.51 +/- 0.03 VE-6424, 6425 Jul, 2001 K-40 3.04 +/- 0.26 3.12+/- 0.37 3.08 +/- 0.23 VE-6424, 6425 MI-6445, 6446 Jul, 2001 K-40 1,407.40 +/- 97.10 1,442.20+/-189.60 1,424.80 +/- 106.51 LW-6489, 6490 Jul, 2001 Gr. Beta 2.61 +/- 0.57 2.79 +/- 0.54 2.70 +/- 0.39 MI-6533, 6534 Jul, 2001 K-40 1,498.60+/-113.90 1,375.50 +/- 129.60 1,437.05 +/- 86.27 DW-6835, 6836 Jul, 2001 Gr. Beta 2.01 +/- 0.59 2.36 +/- 0.63 2.19 +/- 0.43 MI-6693, 6694 Aug, 2001 K-40 1,294.30 +/-118.70 1,417.30 +/-176.50 1,355.80 +/- 106.35 MI-6693, 6694 Aug, 2001 Sr-90 1.47 +/- 0.42 1.23 +/- 0.41 1.35 +/- 0.29 WW-6952, 6953 Aug, 2001 Gr. Beta 5.49 +/- 0.69 5.80 +/- 0.69 5.64 +/- 0.49 MI-6906, 6907 Aug, 2001 K-40 1,613.80 +/- 218.50 1,532.70 +/- 135.80 1,573.25+/-128.63 VE-6973, 6974 Aug, 2001 K-40 4.21 +/- 0.24 4.29 +/- 0.64 4.25 +/- 0.34 LW-7851, 7852 Aug, 2001 Gr. Beta 2.20 +/- 0.48 2.12+/-Q.42 2.16 +/-0.32 MI-7001, 7002 Aug, 2001 K-40 1,453.80 +/-148.10 1,285.30 +/- 190.50 1,369.55+/-120.65 MI-7073, 7074 Aug, 2001 K-40 1,217.30 +/- 80.83 1,218.30 +/-99.13 1,217.80 +/- 63.95 LW-7145, 7146 Aug, 2001 Gr. Beta 2.77 +/- 0.53 3.60 +/- 0.59 3.19 +/- 0.39 MI-7221, 7222 Aug, 2001 K-40 1,192.90 +/- 95.40 1,388.90 +/-132.70 1,290.90 +/- 81.72 MI-7221, 7222 Aug, 2001 Sr-90 2.10 +/- 0.48 1.72+/-0.47 1.91 +/-0.34 SWU-7527, 7528 Aug, 2001 Gr. Beta 17.51 +/-3.06 20.36 +/- 3.31 18.93 +/- 2.25 Aug, 2001 K-40 2.12 +/-0.47 2.47 +/- 0.34 2.30 +/- 0.29 VE-7485, 7486 DW-7506, 7507 Aug, 2001 Gr. Beta 4.25+/-1.18 4.13++/-1.12 4.19+/-0.81 MI-7622, 7623 Sep, 2001 K-40 1,340.10+/- 111.10 1,290.80+/-116.50 1,315.45 +/- 80.49 MI-7664, 7665 Sep, 2001 K-40 1,408.10 +/-102.70 1,396.90 +/-114.30 1,402.50 +/- 76.83 MI-7876, 7877 Sep, 2001 K-40 1,416.40+/- 192.30 1,318.00 +/- 155.50 1,367.20+/-123.65 G-7960, 7961 Sep, 2001 Be-7 1.27 +/- 0.21 1.25 +/- 0.25 1.26+/-0.16 A5-4

Table A-5. In-house "duplicate" sariples.

Concentration in pCi/La Sample Lab First Second Averaged Codes Date Analysis Result Result Result G-7960, 7961 Sep, 2001 K-40 5.21 +/- 0.57 5.70 +/- 0.63 5.45 +/- 0.43 F-8011, 8012 Sep, 2001 Cs-1 37 0.06 +/- 0.02 0.04 +/- 0.02 0.05 +/- 0.01 F-8011, 8012 Sep, 2001 Gr. Beta 3.68+/-0.12 3.50+/-0.11 3.59 +/- 0.08 F-8011, 8012 Sep, 2001 K-40 3.47 +/- 0.49 3.38 +/- 0.47 3.43 +/- 0.34 MI-8149, 8150 Sep, 2001 K-40 1,551.70 +/-118.00 1,489.90+/-123.60 1,520.80 +/- 85.44 MI-8343, 8344 Sep, 2001 K-40 1,550.30 +/-170.60 1,368.10+/-126.70 1,459.20 +/- 106.25 VE-8319, 8320 Sep, 2001 Gr. Beta 3.37 +/-0.10 3.42+/-0.11 3.39 +/- 0.07 VE-8319, 8320 Sep, 2001 K-40 2.14+/-0.46 2.24 +/- 0.37 2.19 +/-0.29 AP-9069, 9070 Sep, 2001 Be-7 0.07 +/- 0.02 0.07 +/- 0.01 0.07 +/- 0.01 AP-9566, 9567 Sep, 2001 Be-7 0.08 +/- 0.02 0.09 +/- 0.03 0.09 +/- 0.02 VE-8700, 8701 Oct, 2001 Be-7 0.24 +/-0.10 0.19+/-0.10 0.22+/-0.07 VE-8700, 8701 Oct, 2001 K-40 2.03 +/- 0.24 2.03 +/- 0.21 2.03+/-0.16 VE-8700, 8701 Oct, 2001 Sr-90 0.01 +/- 0.00 0.01 +/-0.00 0.01 +/-0.00 AP-9048, 9049 Oct, 2001 Be-7 0.07 +/- 0.01 0.07 +/- 0.00 0.07 +/- 0.01 DW-8636, 8637 Oct, 2001 Gr. Beta 4.74+/-1.06 5.08+/-1.21 4.91 +/-0.80 DW-8615, 8616 Oct, 2001 Gr. Beta 4.65 +/- 0.58 4.28 +/- 0.54 4.47 +/- 0.40 AP-9090, 9091 Oct, 2001 Be-7 0.07 +/- 0.01 0.07 +/- 0.01 0.07+/-0.01 AP-9166, 9167 Oct, 2001 Be-7 0.08 +/- 0.02 0.08 +/- 0.02 0.08 +/- 0.01 AP-9187, 9188 Oct, 2001 Be-7 0.07 +/- 0.01 0.05 +/- 0.01 0.06 +/- 0.01 VE-10562, 10563 Oct, 2001 Be-7 309.90 +/-158.80 348.30+/-168.10 329.10+/-115.62 VE-1 0562, 10563 Oct, 2001 K-40 6,407.10 +/- 620.70 6,057.50+/- 660.40 6,232.30 +/- 453.15 WW-8636, 8637 Oct, 2001 Gr. Beta 5.08+/-1.20 4.74+/-1.06 4.91 +/- 0.80 DW-8894, 8895 Oct, 2001 Gr. Beta 4.28 +/- 0.89 3.40 +/- 0.90 3.84 +/- 0.63 MI-9232, 9233 Oct, 2001 K-40 1,440.70 +/- 46.60 1,424.80 +/- 76.40 1,432.75 +/- 44.75 VE-9518, 9519 Oct, 2001 K-40 1.91 +/- 0.22 1.97 +/- 0.39 1.94 +/- 0.22 WW-10257, 10258 Nov, 2001 H-3 755.90+/-102.50 684.70 +/- 99.90 720.30 +/- 71.57 VE-10333, 10334 Nov, 2001 Be-7 0.68 +/- 0.26 0.99 +/- 0.26 0.84+/-0.18 VE-10333, 10334 Nov, 2001 K-40 6.10+/-0.72 5.83 +/- 0.72 5.97 +/- 0.51 MI-10588, 10589 Nov, 2001 K-40 1,428.40+/-114.70 1,445.50 +/-129.40 1,436.95 +/- 86.46 DW-10688, 10689 Nov, 2001 Gr. Beta 3.49 +/- 0.91 2.36 +/- 0.76 2.93 +/- 0.60 WW-10905, 10906 Dec, 2001 H-3 233.90 +/- 90.60 226.30 +/- 90.20 230.10 +/- 63.92 SS-10953, 10954 Dec, 2001 Ac-228 1.10+/-0.25 0.91 +/-0.16 1.00+/-0.15 SS-10953,10954 Dec, 2001 Bi-214 0.69 +/- 0.08 0.75 +/- 0.08 0.72 +/- 0.06 SS-10953,10954 Dec, 2001 Co-58 0.21 +/- 0.05 0.18+/-0.04 0.19+/-0.03 SS-10953,10954 Dec, 2001 Co-60 0.93 +/- 0.06 0.94 +/- 0.06 0.93 +/- 0.04 SS-10953, 10954 Dec, 2001 Cs-137 0.13 +/-0.03 0.16+/-0.03 0.14+/-0.02 A5-5

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged Codes Date Analysis Result Result Result SS-10953, 10954 Dec, 2001 K-40 9.91 +/- 0.83 8.36 +/- 0.80 9.13+/- 0.57 SS-1 0953, 10954 Dec, 2001 Pb-212 0.94 +/- 0.05 0.91 +/-0.06 0.92 +/- 0.04 SS-1 0953, 10954 Dec, 2001 Pb-214 0.83 +/- 0.08 0.82 +/- 0.07 0.83 +/- 0.05 SS-1 0953, 10954 Dec, 2001 Ra-226 1.76 +/-0.37 1.67 +/- 0.37 1.72 +/- 0.26 SS-1 0953, 10954 Dec, 2001 TI-208 0.34 +/- 0.05 0.31 +/-0.05 0.32 +/- 0.04 MI-11033, 11034 Dec, 2001 K-40 1,339.80+/-128.70 1,435.80+/-117.30 1,387.80 +/- 87.07 M1-11033, 11034 Dec, 2001 Sr-90 1.31 +/- 0.41 1.38 +/- 0.37 1.35 +/- 0.28 AP-11888, 11889 Dec, 2001 Be-7 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.01 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.

"aResults are reported in units of pCi/L, except for elemental potassium (K) in milk (mg/L), air filters (pCi/Filter), food products and vegetation (pCi/g), soil and sediments (pCi/kg).

A5-6

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

Concentrationb Lab Sample Date MAPEP Resultd Control Code Type Collected Analysis Laboratory resultc Is, N=1 Limits STSO-923 SOIL Jan, 2001 Am-241 0.0 - 2.6 Included in the testing series as a "false positive". No activity expected. Result of analysis; < 0.8 Bq/L.

STSO-923 SOIL Jan, 2001 Co-57 100.2 +/- 3.5 103.0+/- 10.3 72.1 - 133.9 STSO-923 SOIL Jan, 2001 Co-60 1,285.1 +/- 5.3 1,270.0+/- 127.0 889.0 - 1,651.0 STSO-923 SOIL Jan, 2001 Cs- 134 81.1+/- 1.8 91.1+/- 9.1 63.8-118.4 STSO-923 SOIL Jan, 2001 Cs-1 37 1,210.6+/- 6.6 1,240.0+/- 124.0 868.0 - 1,612.0 STSO-923 SOIL Jan, 2001 K-40 732.6 +/- 21.2 652.0+/- 65.2 456.4 - 847.6 STSO-923 SOIL Jan, 2001 Mn-54 212.6+/-6.7 203.0+/- 20.3, 142.1 - 263.9 STSO-923 SOIL Jan, 2001 Pu-238 110.7+/-7.2 115.0+/- 11.5 80.5- 149.5 STSO-923 SOIL Jan, 2001 Pu-239/40 79.6 +/- 5.9 83.4+/- 8.3 58.4- 108.4 STSO-923 SOIL Jan, 2001 Sr-90 159.8+/- 9.5 209.0+/- 20.9 146.3 - 271.7 STSO-923 SOIL Jan, 2001 U-233/4 45.0 +/- 3.9 60.0+/- 6.0 42.0 - 78.0 STSO-923 SOIL Jan, 2001 U-238 165.6+/- 7.4 191.0+/- 19.1 133.7 - 248.3 STSO-923 SOIL Jan, 2001 Zn-65 428.5+/- 10.9 382.0+/- 38.2 267.4 - 496.6

" 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.

b All results are in Bqfkg or Bq/L as requested by the Department of Energy.

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

A6-1

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

b Concentration Lab Sample Date Control Analysis Laboratory result EML Resultc Limitsd Code Type Collected STSO-904 SOIL Mar, 2001 Ac-228 45.60 +/-4.0 42.70 0.80- 1.50 Mar, 2001 Am-241 14.40+/-0.5 14.80 0.63 - 2.64 STSO-904 SOIL Mar, 2001 Bi-212 53.20+/-3.1 42.00 0.45- 1.23 STSO-904 SOIL probable cause Naturally-occurring radium and thorium daughters are p resent in the shield background, and a of the higher bias seen for isotopes of lead and bismuth.

STSO-904 SOIL Mar, 2001 Bi-214 42.10+/-7.7 32.60 0.78-1.50 Mar, 2001 Cs-1 37 1,772.60 +/- 79.8 1,740.00 0.80- 1.29 STSO-904 SOIL Mar, 2001 K-40 583.80 +/- 52.6 468.00 0.80- 1.37 STSO-904 SOIL Mar, 2001 Pb-212 46.60 +/- 8.5 41.50 0.74-1.36 STSO-904 SOIL Mar, 2001 Pb-214 45.30 +/- 8.6 34.30 0.76- 1.53 STSO-904 SOIL Mar, 2001 Pu-239/40 26.00 +/- 0.8 25.60 0.71 - 1.33 STSO-904 SOIL Mar, 2001 Sr-90 55.60 +/- 2.2 69.00 0.61 - 3.91 STSO-904 SOIL Mar, 2001 Am-241 2.15+/-0.1 1.67 0.76 - 1.48 STW-905 WATER Mar, 2001 Co-60 97.00 +/- 0.8 98.20 0.80- 1.20 STW-905 WATER Mar, 2001 Cs-1 37 70.10+/-4.0 73.00 0.80- 1.20 STW-905 WATER Mar, 2001 H-3 76.50 +/- 5.5 79.30 0.74 - 2.29 STW-905 WATER Mar, 2001 Pu-238 1.69 +/- 0.1 1.58 0.74- 1.22 STW-905 WATER Mar, 2001 Pu-239140 1.69 +/- 0.1 1.64 0.75- 1.26 STW-905 WATER Mar, 2001 Sr-90 3.85 +/- 0.1 4.40 0.64-1.50 STW-905 WATER Mar, 2001 U-23314 0.90+/-0.1 1.04 0.80- 1.40 STW-905 WATER Mar, 2001 U-238 0.88 +/-0.1 1.04 0.80- 1.29 STW-905 WATER Mar, 2001 Gr. Alpha 1,724.60 +/- 141.7 1,900.00 0;58- 1.26 STW-906 WATER Mar, 2001 Gr. Beta 1,246.40 +/- 31.1 1,297.00 0.56- 1.50 STW-906 WATER Mar, 2001 Am-241 0.47 +/- 0.0 0.49 0.69 - 2.40 STAP-907 AIR FILTER Mar, 2001 Co-60 20.11 +/-0.2 19.44 0.79-1.30 STAP-907 AIR FILTER Mar, 2001 Cs-1 34 2.71 +/-0.2 2.83 0.74- 1.21 STAP-907 AIR FILTER Mar, 2001 Cs-1 37 9.86 +/- 0.2 8.76 0.78- 1.35 STAP-907 AIR FILTER Mar, 2001 Mn-54 7.25 +/- 0.2 6.52 0.80- 1.36 STAP-907 AIR FILTER Mar, 2001 Pu-238 0.23 +/- 0.0 0.22 0.66- 1.35 STAP-907 AIR FILTER Mar, 2001 Pu-239/40 0.12+/-0.0 0.14 0.69- 1.29 STAP-907 AIR FILTER A7-1

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

Concentrationb Lab Sample Date Control Code EML Resultc Limits' Code Type Collected Analysis Laboratory result STAP-907 AIR FILTER Mar, 2001 Sr-90 7.41 +/-0.2 7.10 0.55 - 2.05 AIR FILTER Mar, 2001 U-233/4 0.05 +/- 0.0 0.05 0.80- 1.92 STAP-907 AIR FILTER Mar, 2001 U-238 0.05 +/- 0.0 0.05 0.80- 1.59 STAP-907 Mar, 2001 Gr. Alpha 2.66 +/- 0.0 3.97 0.57-1.47 STAP-908 AIR FILTER AIR FILTER Mar, 2001 Gr. Beta 2.30 +/- 0.0 2.58 0.76-1.52 STAP-908 Mar, 2001 Am-241 6.10+/- 0.2 6.17 0.72 - 2.34 STVE-909 VEGETATION VEGETATION Mar, 2001 Cm-244 3.50 +/- 0.5 3.69 0.61 -1.61 STVE-909 Mar, 2001 Co-60 28.50 +/- 2.1 30.40 0.75-1.51 STVE-909 VEGETATION VEGETATION Mar, 2001 Cs-1 37 795.50 +/- 76.4 842.00 0.80- 1.37 STVE-909 Mar, 2001 K-40 592.60 +/- 42.5 603.00 0.78- 1.43 STVE-909 VEGETATION VEGETATION Mar, 2001 Pu-239/40 8.50 +/- 0.6 9.58 0.67-1.49 STVE-909 Mar, 2001 Sr-90 1,239.60 +/- 130.0 1,330.00 0.52-1.23 STVE-909 VEGETATION WATER Sep, 2001 Am-241 0.70 +/- 0.1 0.76 0.76- 1.48 STW-925 WATER Sep, 2001 Co-60 206.70+/-4.7 209.00 0.80 - 1.20 STW-925 WATER Sep, 2001 Cs-137 46.60 +/- 0.8 45.13 0.80- 1.24 STW-925 WATER Sep, 2001 H-3 254.10+/-3.6 207.00 0.74 - 2.29 STW-925 WATER Sep, 2001 Ni-63 50.90 +/- 3.0 45.25 0.70- 1.30 STW-925 Sep, 2001 Pu-238 1.10 +/-0.1 1.09 0.74-1.22 STW-925 WATER WATER Sep, 2001 Pu-239/40 1.60 +/- 0.1 1.63 0.75-1.26 STW-925 WATER Sep, 2001 Sr-90 4.10 +/-0.3 3.73 0.64-1.50 STW-925 WATER Sep, 2001 Uranium 2.20 +/- 0.2 2.37 0.73-1.37 STW-925 WATER Sep, 2001 Gr. Alpha 1,220.00 +/- 32.0 1,150.00 0.58- 1.26 STW-926 WATER Sep, 2001 Gr. Beta 8,461.00 +/- 206.0 7,970.00 0.56-1.50 STW-926 SOIL Sep, 2001 Ac-228 68.10+/- 1.4 59.57 0.80- 1.50 STSO-927 Sep, 2001 Am-241 5.20 +/- 1.3 4.43 0.63 - 2.64 STSO-927 SOIL Sep, 2001 Bi-212 65.10+/-1.6 62.07 0.45 - 1.23 STSO-927 SOIL SOIL Sep, 2001 Bi-214 47.30 +/- 4.7 36.90 0.78-1.50 STSO-927 Sep, 2001 Cs-137 659.20+/-10.8 612.33 0.80 - 1.29 STSO-927 SOIL SOIL Sep, 2001 K-40 737.70+/-16.6 623.33 0.80- 1.37 STSO-927 A7-2

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

Concentration Lab Sample Date Control Code Type Collected Analysis Laboratory result EML Resultf Limits-Pb-212 64.70 +/- 3.8 58.33 0.74- 1.36 STSO-927 SOIL Sep, 2001 Sep, 2001 Pb-214 53.70 +/- 7.7 39.67 0.76 - 1.53 STSO-927 SOIL Sep, 2001 Pu-239/40 9.30 +/- 2.9 8.95 0.71 -1.33 STSO-927 SOIL Sep, 2001 Sr-90 27.40 +/- 6.3 30.60 0.61 - 3.91 STSO-927 SOIL Sep, 2001 Uranium 155.60 +/- 7.8 194.23 0.62-1.35 STSO-927 SOIL Sep, 2001 Am-241 7.00 +/- 0.3 6.92 0.72 - 2.34 STVE-928 VEGETATION Sep, 2001 Cm-244 4.30 +/- 0.8 4.31 0.61 -1.61 STVE-928 VEGETATION Sep, 2001 Co-60 40.20 +/- 0.9 35.30 0.75- 1.51 STVE-928 VEGETATION Sep, 2001 Cs-1 37 1,184.00 +/- 2.8 1,030.00 0.80- 1.37 STVE-928 VEGETATION Sep, 2001 K-40 1,023.00 +/- 44.1 898.67 0.78- 1.43 STVE-928 VEGETATION Sep, 2001 Pu-239/40 8.90+/-1.4 11.02 0.67- 1.49 STVE-928 VEGETATION Sep, 2001 Sr-90 1,364.00 +/-18.4 1,612.80 0.52-1.23 STVE-928 VEGETATION Sep, 2001 Am-241 0.09 +/- 30.0 0.09 0.69 - 2.40 STAP-929 AIR FILTER Sep, 2001 Co-60 16.90 +/- 0.3 17.50 0.79- 1.30 STAP-929 AIR FILTER Sep, 2001 Cs-134 11.80 +/- 0.2 12.95 0.74- 1.21 STAP-929 AIR FILTER Sep, 2001 Cs-1 37 18.30 +/- 0.3 17.10 0.78- 1.35 STAP-929 AIR FILTER Sep, 2001 Mn-54 85.40 +/- 1.3 81.15 0.80- 1.36 STAP-929 AIR FILTER Sep, 2001 Pu-238 0.05 +/- 0.0 0.07 0.66 - 1.35 STAP-929 AIR FILTER Sep, 2001 Pu-239/40 0.22 +/- 0.0 0.23 0.69-1.29 STAP-929 AIR FILTER Sep, 2001 Sr-90 3.11 +/-0.1 3.48 0.55 - 2.05 STAP-929 AIR FILTER Sep, 2001 Uranium 0.24 +/- 0.1 0.22 0.80 - 2.54 STAP-929 AIR FILTER Sep, 2001 Gr. Alpha 6.30+/-0.1 5.36 0.57- 1.47 STAP-930 AIR FILTER Sep, 2001 Gr. Beta 13.80 +/-0.1 12.77 0.76-1.52 STAP-930 AIR FILTER

' The Environmental Measurements Laboratory provides the following nuclear species : Air Filters, Soil, Vegetation and Water.

' Results are reported in Bq/L with the following exceptions: Air Filter results are reported in Bq/Filter, Soil results are reported in Bq/Kg, Vegetation results are reported in Bq/Kg.

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

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

A7-3

APPENDIX B DATA REPORTING CONVENTIONS B-1

Data Reportinci Conventions 1.0. All activities, except gross alpha and gross beta, are decay corrected to collection time or the end of the collection period.

2.0. Single Measurements Each single measurement is reported as follows: x +/-s where: x = value of the measurement; s = 2s counting uncertainty (corresponding to the 95% confidence level).

In cases where the activity is less than the lower limit of detection L, it is reported as: <L, where L = the lower limit of detection based on 4.66s uncertainty for a background sample.

3.0. Duplicate analyses 3.1 Individual results: For two analysis results; xi +/- sl and x2 +/- s2 Reported result: x +/- s; where x = (1/2) (xl + x2) and s = (1/2) 1+ S2 3.2. Individual results: <L1, <L2 Reported result: <L, where L = lower of L1 and L2 3.3. Individual results: x +/- s, <L Reported result: x +/- s if x tL; <L otherwise.

4.0. Computation of Averagies and Standard Deviations 4.1 Averages and standard deviations listed in the tables are computed from all of the individual measurements over the period averaged; for example, an annual standard deviation would not be the average of quarterly standard deviations. The average x and standard deviation s of a set of n numbers x1 , x2 ... xn are defined as follows:

2 1- s _x_

x n Ex n-1 4.2 Values below the highest lower limit of detection are not included in the average.

4.3 If all values in the averaging group are less than the highest LLD, the highest LLD is reported.

4.4 If all but one of the values are less than the highest LLD, the single value x and associated two sigma error is reported.

4.5 In rounding off, the following rules are followed:

4.5.1. If the number following those to be retained is less than 5, the number is dropped, and the retained number s are kept unchanged. As an example, 11.443 is rounded off to 11.44.

4.5.2. If the number following those to be retained is equal to or greater than 5, the number is dropped and the last retained number is raised by 1. As an example, 11.445 is rounded off to 11.45.

B-2

APPENDIX C Maximum Permissible Concentrations of Radioactivity in Air and Water Above Background in Unrestricted Areas C-1

Table C-1. Maximum permissible concentrations of radioactivity in air and water above natural background in unrestricted areasa.

3 Air (pCi/m ) Water (pCi/L)

Gross alpha 1 x 103 Strontium-89 8,000 1 Strontium-90 500 Gross beta Iodine-131b 2.8 x 10-1 Cesium-1 37 1,000 Barium-140 8,000 Iodine-131 1,000 Potassium-40c 4,000 Gross alpha 2 Gross beta 10 Tritium I x 106 a Taken from Table 2 of Appendix B to Code of Federal Regulations Title 10, Part 20, and appropriate footnotes.

Concentrations may be averaged over a period not greater than one year.

b Value adjusted by a factor of 700 to reduce the dose resulting from the air-grass-cow-milk-child pathway.

c A natural radionuclide.

C-2

APPENDIX D Sampling Location Maps D-1

/ Ih Figure D-1. Sample collection and analysis program: TLD locations, General Area of Site Boundary (Table 5.2).

D-2

Figure D-2. Sample Collection and Analysis program:TLD locations, 4-5 miles distant from the Plant, Control and Special Interest locations (Table 5.2).

D-3

9oi ZAN i Figure D-3. Sample Collection and analysis program: Radiation Environmental Monitoring Program, Sampling locations (Table 5.2). D-4