ML051310368

Annual Report Radiation Environmental Monitoring Program January 1 to December 31, 2004

ML051310368
Person / Time
Site:	Duane Arnold
Issue date:	12/31/2004
From:	Grob B Environmental
To:	Document Control Desk, Office of Nuclear Reactor Regulation
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Download: ML051310368 (104)

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- Environmental, Inc.

Midwest Laboratory an Allegheny Technologies Co.

700 Landwehr Road

• Northbrook, IL 60062-2310 ph. (847) 564-0700

• tax (847) 564-4517 DUANE ARNOLD ENERGY CENTER CEDAR RAPIDS, IOWA DOCKET NO. 50-331 ANNUAL REPORT TO THE UNITED STATES NUCLEAR REGULATORY COMMISSION Radiation Environmental Monitoring Program January 1 to December 31, 2004 Prepared and submitted by ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8001 Approved:

Brobia ro M.S.

L rafR anager

PREFACE Staff members of the Environmental, Inc., Midwest Laboratory were responsible for the acquisition of data presented in this report, with the exception of Appendices D and E, which were completed by DAEC personnel. All environmental samples, with the exception of aquatic, were collected by personnel of DAEC. Aquatic samples were collected by the University of Iowa Hygienic Laboratory.

The report was prepared by Environmental, Inc., Midwest Laboratory, with the exception of Appendices D and E, which were prepared by DAEC personnel.

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TABLE OF CONTENTS No. Page PREFACE ............................... ii List of Tables ................. v List of Figures .................. vi

1.0 INTRODUCTION

................. I 2.0

SUMMARY

................. 2 3.0 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM . . 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 4.0 RESULTS AND DISCUSSION ................................................... 7 4.1 Atmospheric Nuclear Detonations and Nuclear Accidents .7 4.2 Program Findings .7 5.0 TABLES AND FIGURES .10

6.0 REFERENCES

CITED .27 APPENDICES A Interlaboratory Comparison Program Results . A-1 B Data Reporting Conventions .B-1 C Effluent Concentration Limits for Radioactivity in Air and Water Above Background in Unrestricted Areas .C-1 D Summary of the Land Use Census .D-1 E Annual Radiation Dose Assessment . E-1 iii

TABLE OF CONTENTS (continued)

PART 11 Paae Data Tabulations and Analyses ...................... i iv

LIST OF TABLES No. Page 5.1 Characteristic Properties of Isotopes Quantified in Gamma-spectroscopic Analyses. 11 5.2 Sample Collection and Analysis Program .12 5.3 Sampling Locations, DAEC .15 5.4 Type and Frequency of Collections .17 5.5 Sample Codes Used in Table 5.4 .18 5.6 Missed Collections and Analyses .19 5.7 Radiological Environmental Monitoring Program Summary .20 In addition, the following tables are in the Appendices:

Appendix A A-1 Interlaboratory Comparison Program Results .. .......................................... Al-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 . ...........................................

A-2 Appendix C C-1 Effluent Concentration Limits for Radioactivity in Air and Water Above Background in Unrestricted Areas ......................................................... C-2 v

LIST OF FIGURES No. Paae 5.1 Radiological Environmental Monitoring Program Sampling Stations near the Duane Arnold Energy Center ................... 25 5.2 Radiological Environmental Monitoring Program Sampling Stations Outside 0.5 Miles .... 26 vi

1.0 INTRODUCTION

This report summarizes and interprets results of the Radiological Environmental Monitoring Program conducted by Environmental, Inc., Midwest Laboratory at the Duane Arnold Energy Center, Palo, Iowa, during the period January - December, 2004. 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 included in Part II of this report.

Duane Arnold Energy Center (DAEC) is located in Linn County, Iowa, on the Cedar River, owned by IES Utilities, Inc and operated by Nuclear Management Corporation. The Duane Arnold Energy Center is a 565.7 MW(e) boiling water reactor. Initial criticality was attained on March 23, 1974. The reactor reached 100% power on August 12, 1974. Commercial operation began on February 1, 1975.

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2.0

SUMMARY

The Radiological Environmental Monitoring Program, as required by the U.S. Nuclear Regulatory Commission (NRC) Technical Specifications for the Duane Arnold Energy Center, is herein described. Results for the year 2004 are summarized and discussed.

Program findings show background levels of radioactivity in the environmental samples collected in the vicinity of the Duane Arnold Energy Center.

No effect on the environment due to the operation of the Duane Arnold Energy Center is indicated.

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3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3.1 Program Design and Data Interpretation The purpose of the Radiological Environmental Monitoring Program at the Duane Arnold Energy Center (DAEC) 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 (TLDs).

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; and (4) Industrial and medical radioactive waste.

In interpreting the data, effects due to the DAEC operation 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 DAEC 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 station 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 the environmental samples collected from the DAEC site. The DAEC's monitoring program includes analyses for strontium-90 and iodine-131, which are fission products, and tritium, which is produced by cosmic rays, atmospheric nuclear detonations, and also by nuclear power plants.

Most samples are also analyzed for gamma-emitting isotopes with results for the following groups quantified: zirconium-95, cesium-137, and cerium-144. These 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 ten (10) days after reactor shutdown. On the other hand, ten (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). 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 next group, manganese-54, cobalt-58 and-60, and zinc-65, are activation products and arise from activation of corrosion products. They are typical components of nuclear power plant effluents, but are not produced in significant quantities by nuclear detonations. Nuclides of the final group, beryllium-7, which is of cosmogenic origin, and potassium-40, a naturally-occurring isotope, were chosen as calibration monitors and should not be considered radiological impact indicators.

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3.1 Program Design and Data Interpretation (continued)

Characteristic properties of isotopes quantified in gamma-spectroscopic analysis are presented in Table 5.1. Other means of distinguishing sources of environmental radiation can be employed in interpreting the data. Current radiation levels can be compared with previous levels, including those measured before the Plant became operational. Results of the DAEC'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 environmental radiological monitoring program at the DAEC is summarized in Table 5.2 and is briefly reviewed below. Table 5.3 defines the sampling location codes used in Table 5.2 and specifies for each location its type (indicator or control) and its distance, direction, and sector relative to the reactor site. The types of samples collected at each location and the frequency of collections are presented in Table 5.4 using codes defined in Table 5.5.

To monitor the air environment, airborne particulates are collected on membrane filters by continuous pumping at twelve locations. Also, airborne iodine is collected by continuous pumping through charcoal filters at six of these locations. Nine of the twelve locations are indicators and three are controls (D-1, D-2, and D-13). Filters are changed and counted weekly. Particulate filters are analyzed for gross beta activity. If gross beta activity exceeds ten times the yearly mean of the control samples, gamma isotopic analysis is performed. Quarterly composites of airborne particulates from each location are analyzed for gamma emitting isotopes.

Charcoal filter samples from six locations (D-2, D-5, D-7, D-8, D-11 and D-15) are analyzed weekly for iodine-1 31.

Ambient gamma radiation is monitored at twelve air sampling locations. In addition, gamma radiation is monitored at thirty-four special locations: eighteen in a circle within a 0.5 mi. radius of the DAEC stack; six in 22.50 sectors within 1 mi. of the DAEC stack; and ten in 22.50 sectors between 1 and 3 miles of the DAEC stack. Two TLDs are placed at each location and are exchanged and analyzed quarterly.

Precipitation is collected monthly from one location and analyzed for gamma-emitting isotopes.

Quarterly composites are analyzed for tritium.

Milk samples were collected monthly from four locations during the non-grazing season, October through April, and biweekly during the grazing season, May 1 through September 30. One location (D-108) is a control, the rest are indicators. All samples are analyzed for iodine-131 and gamma-emitting isotopes.

For additional monitoring of the terrestrial environment, grain, hay and broad leaf vegetation samples are collected annually, as available, from seven locations: one control (D-108) and six indicators (D-16, D-57, D-58, D-72, D-96, and D-109). Grain, hay and broad leaf (green leafy) vegetation samples are analyzed for gamma-emitting isotopes and at least one broad leaf vegetation is analyzed for iodine-131. If cattle are slaughtered for home use, a meat sample is collected annually, during or immediately following a grazing period from animals grazing on-site.

The sample is analyzed for gamma-emitting isotopes. Also, potable ground water is collected quarterly from a treated municipal water system (D-53), the inlet to the municipal water treatment system (D-54) and four additional ground water-locations (D-55, D-57, D-58, and D-72). The samples are analyzed for gross beta and tritium. If gross beta activity exceeds ten times the yearly mean of the control samples, gamma isotopic, strontium-89 and strontium-90 analyses are performed.

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Program Descrintion (continued)

Soil samples are collected once per year at two indicator locations (D-15 and D-16). The samples are analyzed for strontium-90 and gamma-emitting isotopes.

Surface water is collected monthly from five river, pond and sewage effluent locations, one control (D-49) and four indicators (D-50, D-51, D-99, and D-107). All monthly samples are analyzed for gamma-emitting isotopes. Tritium analyses are performed on quarterly composites from each location. In addition, samples from Location D-107 (plant sewage discharge) are analyzed for potassium (ICP analysis).

The aquatic environment is also monitored by upstream and downstream (D-49 and D-61) semiannual collections of fish. River bottom sediment is collected semiannually at the plant's intake and discharge (D-50 and D-51) and downstream of the sewage plant (D-107). The 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.

In no instance did a missed analysis affect the minimum sampling requirements as specified in the ODAM.

(1) TLD:

Both regular and emergency TLDs were missing from location D-82, for the second quarter of 2004.

(2) Milk:

Milk was not available from location D-101, January through April, the week ending August 10 and October through December, 2004.

(3) Hay and Grain:

No hay samples were available from the locations D-16 and D-72 for the collection of October 6, 2004. Grain was received from both locations.

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

Gamma-spectroscopic analyses were performed with HPGe detectors. Levels of iodine-131 in vegetation were determined by gamma spectroscopy. Concentrations of airborne iodine-131 in charcoal samples were also determined by gamma spectroscopy.

Tritium was determined by liquid scintillation.

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, 2003 ). The QA Program includes participation in Interlaboratory Comparison (crosscheck) Programs. Results obtained in crosscheck programs are presented in Appendix A.

3.5 Proqram Modifications There were no program modifications in 2004.

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4.0 RESULTS AND DISCUSSION All collections and analyses were made as scheduled, except for the listing in Table 5.6.

Results are summarized in Table 5.7 as recommended by the Nuclear Regulatory Commission. For each type of analysis and sample medium, the table lists the mean and range of all indicator and control locations, as well as that location with the highest mean and range.

The tabulated results of all measurements are not included in this section, although references to these results will be made in the discussion. A complete tabulation of results for 2003 is contained in Part II of the Annual Report on the Radiological Environmental Monitoring Program for the Duane Arnold Energy Center.

4.1 Atmospheric Nuclear Detonations and Nuclear Accidents There were no reported atmospheric nuclear tests in 2004.

4.2 Program Findings Results obtained show background levels of radioactivity in the environmental samples collected in 2004.

Airborne Particulates The average annual gross beta concentrations in airborne particulates were identical at both indicator and control locations (0.028 pCVm ) and similar to levels observed from 1989 through 2003. The results are tabulated below.

Year Indicators I Controls Year Indicators Controls 3 3 Concentration ( pCirm ) Concentration ( pCilm) 1989 0.026 0.029 1997 0.023 0.023 1990 0.022 0.024 = 1998 0.024 0.024 1991 0.023 0.022 1999 0.026 0.027 1992 0.022 0.023 2000 0.026 0.027 1993 0.022 0.023 2001 0.026 0.026 1994 0.023 0.024 2002 0.027 0.027 1995 0.025 0.024 2003 0.029 0.029 1996 0.024 0.023 = 2004 0.028 0.028 Average annual gross beta concentrations in airborne particulates.

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 Al-Salih, 1955), was detected in all samples.

All other gamma-emitting isotopes were below their respective LLD limits. No effect from plant operation is indicated.

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Airborne Iodine 3

Weekly levels of airborne iodine-131 were below the lower limit of detection (LLD) of 0.07 pCrm in all samples.

Ambient Radiation (TLDs)

At twelve air sampling locations, the TLD readings averaged 16.2 and 14.6 mR/quarter for indicator and control locations, respectively. At locations within a half mile, one mile and three mile radius of the stack, measurements averaged 17.5 mR/quarter, 18.0 mR/quarter and 16.0 mR/quarter, respectively. The average for all locations was 16.8 mR/quarter. This is lower than the estimated average natural background radiation for Middle America, 19.5 mR/quarter, which is based on data on Pages 71 and 108 of the report, "Natural Background Radiation in the United States" (National Council on Radiation Protection and Measurements, 1975). The terrestrial absorbed dose (uncorrected for structural and body shielding) ranges from 8.8 to 18.8 mrad/quarter and averages 11.5 mrad/quarter for Middle America. Cosmic radiation and cosmogenic radionuclides contribute 8.0 mrad/quarter for a total average of 19.5 mrad/quarter.

No plant effect is indicated.

Precipitation Concentration of tritium in precipitation was below the LLD of 161 pCVL in all samples. No gamma-emitting isotopes were detected. No plant effect is indicated.

Milk Iodine-1 31 results were below the detection limit of 1.0 pCVL in all samples.

No gamma-emitting isotopes, except naturally occurring potassium-40, were detected in any milk samples. This is consistent with the finding of the National Center for Radiological Health 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 (National Center for Radiological Health, 1968).

In summary, milk data for 2004 show no radiological effects of plant operation.

Ground Water The annual mean for gross beta activity measured 3.9 pCVL, similar to levels observed from 1989 through 2003.

The location with the highest mean (6.6 pCIL) was D-54, the inlet to the municipal water treatment plant, primarily due to an elevated measurement observed in the fourth quarter, 2004.

Analyses for gamma emitting isotopes, strontium-89 and strontium-90 were performed and it was determined that the cause of the higher beta activity was contribution from naturally-occurring isotopes. No plant effect was indicated.

Tritium activity measured below the LLD of 163 pCiL in all samples. No effect from plant operation is indicated.

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Vegetation lodine-131 concentrations in broadleaf vegetation were below the LLD level of 0.038 pCi/g wet weight in all samples.

Except for potassium-40, which was observed in all vegetation samples ( broadleaf, grain, and forage ), all other gamma-emitting isotopes were below detection limits. No effect from plant operation is indicated.

Soil Strontium-90 was measured in two soil samples at a concentration of 0.050 pClg dry weight.

Cesium-137 activity averaged 0.16 pCig dry weight. Both strontium-90 and cesium-137 activities are similar to or less than levels observed from 1989 through 2003, these levels are generally attributable to deposition of fallout from previous decades.

Naturally-occurring potassium-40 averaged 12.28 pCi/g dry weight. No effect from the plant operation is indicated.

Surface Water Measurable tritium was detected in three of the four D-107 (sewage effluent) composites, at an average concentration of 396 pCi/L. This is below the Environmental Protection Agency's drinking water standard of 20,000 pCiL. For all remaining surface water collections, tritium levels were measured below the LLD level of 161 pCi/L.

All gamma-emitting isotopes were below their respective LLDs.

Potassium-40 is measured at one location, D-107 (sewage effluent). The concentration ranged from 8.7 to 25.1 pCiL and averaged 18.1 pCi/L.

No plant effect on surface water is indicated.

Fish All gamma-emitting isotopes, except naturally-occurring potassium40, in edible portions were below detection limits. The potassium-40 level was similar at both indicator and control locations (2.70 and 2.83 pCi/g wet, respectively). No plant effect on fish is indicated.

River Sediments No effect from the plant operation is indicated.

River sediments were collected in August and November, 2004, and analyzed for gamma-emitting isotopes. Potassium-40 activity ranged from 5.73 - 9.11 pCi/g dry weight and averaged 7.43 pCi/g dry weight.

All other gamma-emitting isotopes were below detection limits.

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5.0 TABLES AND FIGURES 10

Table 5.1 Characteristic properties of isotopes quantified in gamma-spectroscopic analyses.

Designation Comment Isotope Half-lifea I. Naturally Occurring A. Cosmogenic Produced by interaction of cosmic Be-7 53.2 d rays with atmosphere B. Terrestrial Primordial K-40 1.26 x 109 y

11. Fission Productsb Nuclear detonations constitute the major environmental source A. Short-lived 1-131 8.04 d Ba-140 12.8 d B. Other than Short-lived Nb-95 35.15 d Zr-95 65 d Ru-1 03 39.35 d Ru-1 06 368.2 d Cs-134 2.061 y Cs-137 30.174 y Ce-141 32.5 d Ce-144 284.31 d l1l. Activation Products Typically found in nuclear power plant Mn-54 312.5 d effluents Fe-59 45.0 d Co-58 70.78 d Co-60 5.26 y Zn-65 245 d a Half-lives are taken from Appendix E of Environmental Quarterly, 1 January 1978, EML-334 (U. S. Department of Energy, 1978).

b Includes fission-product daughters.

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Table 5.2 Sample collection and analysis program.

Sampling Location Exposure Pathway and/or Sample Description Sampling and Collection Type and Frequency Sample Type Point Frequency of Analysis' Airborne 1 Cedar Rapids (C) Continuous operation of Analyze for gross beta activity Particulates 2 Marion (C) sampler with sample more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after filter 3 Hiawatha collection at least once per change. Perform gamma 5 Palo week or as required by dust isotopic analysis on each sample 6 Center Point loading having gross beta activity greater 7 Shellsburg than ten times the yearly mean 8 Urbana of the control samples.

10 Atkins 11 Toddville Composite weekly samples to 13 Albumett (C) form a quarterly composite (by 15 On-site North location). Analyze quarterly .

16 On-site South composite for gamma isotopic.

Airborne Iodine 2 Marion (C) Continuous operation of Analyze each cartridge for 5 Palo sampler with sample iodine-131.

7 Shellsburg collection at least once per 8 Urbana week.

11 Toddville 15 On-site North Ambient 1-2 (C) Air Particulate Two dosimeters Read gamma radiation dose Radiation 3, 5-8 Locations continuously at each quarterly.

10, 11 location. Both dosimeters 13 (C) are changed at least 15, 16 quarterly.

17-23, s 0.5 mi. of Stack 28-32, 82-86, 91 43-48 s 1.0 mi. of Stack 33-42 s 3.0 mi. of Stack Surface Water 49 Lewis Access (C) Once per month. Gamma isotopic analyses of 50 Plant Intake (C) each sample (by location).

51 Plant Discharge 99 Pleasant Creek Composite monthly samples to 107 Plant Sewage form quarterly composite (by Dischange location). Analyze quarterly composite for tritium.

(C)denotes control location. All other locations are indicators.

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Table 5.2 Sample collection and analysis program, (continued).

Sampling Location Exposure Pathway and/or Sample Description Sampling and Collection Type and Frequency Sample Type Point Frequency of Analysiss Ground 53 Treated Municipal Grab sample at least Gross beta and tritium activity Water Water once per quarter analysis on quarterly sample.

(potable) 54 Inlet to Municipal If gross beta is greater than Water Treatment ten times the yearly mean of System control samples, perform gamma isotopic and Sr-89 and 55 On-site well Sr-90 analyses.

57, 58 Wells off-site and 72 within 4 km of DAEC River 50 Plant Intake (C) At least once every Gamma isotopic analysis of each Sediment 51 Plant Discharge six months. sample.

107 Sewage Effluent Canal (on-site)

Vegetation 16, 57 Farms that raise food Annually at harvest Gamma isotopic analysis of 58, 72, crops time. One sample of edible portions.

94, 96, each: grain, green 109 leafy, and forage. At 1-131 analysis on broadleaf least one sample vegetation.

108 (C) should be broadleaf vegetation.

Fish 49 Cedar River upstream One sample per 6 Gamma isotopic analysis on of DAEC not months (once during edible portions.

influenced by effluent January through July (C) and once during Downstream of DAEC August through 61 in influence of effluent December).

Milkb 108 (C) Control Farm At least once per two During the grazing season:

weeks during the Gamma isotopic and iodine-131 grazing season. analyses of each sample.

96, 101 Dairy Farms within 10 At least once per Durina the non-grazina season:

109 miles of Site month during the Gamma isotopic and iodine-131 non-grazing season. analyses of each sample.

(C)denotes control location. All other locations are indicators.

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Table 5.2 Sample collection and analysis program, (continued).

Sampling Location Exposure Pathway and/or Sample Description Sampling and Collection Type and Frequency Sample Type Point Frequency of Analysis' Precipitation On-site Monthly Gamma isotopic on all samples.

Tritium on quarterly composites.

Meat On-site Annually Gamma Isotopic Soil 15, 16 On-site Annually Gamma Isotopic and Sr-90.

a Gamma isotopic analysis and analysis for gamma-emitting nuclides refer to high resolution gamma ray spectrum analysis. Any radionuclide detected at a concentration greater than the lower limit of detection (LLD) should be reported quantitatively; conversely, any radionuclide concentration less than the LLD should not be reported.

b The grazing season is considered to be May 1 through September 30.

c Meat was not collected In2004; no animals slaughtered for home use.

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Table 5.3 Sampling locations, Duane Arnold Energy Center.

Sampling Location Code Type Sampling Location Description Distance and Direction Point from Site Stack D-1 C 1 Cedar Rapids 11 mi @ 135° SE D-2 C 2 Marion 11 mi @ 125' ESE D-3 3 Hiawatha 7 mi @ 1300 SE D-5 5 Palo 3 mi @ 200° SSW D-6 6 Center Point 7 ml @0° N D-7 7 Shellsburg 6mi@255° W D-8 8 Urbana 10 mi@ 3450 NW D-1 0 10 Atkins 9mi@210° SSW D-11 11 Toddville 4mi@90° E D-13 C 13 Albumeft 9 mi@ 70° ENE D-15 15 On-site, Northwest 0.5 mi @ 3050 NW D-16 16 On-site, South 0.5 ml @ 1900 SSE D-17 17 On-site, N 0.5 mi N D-1 8 18 On-site, NNE 0.5 ml NNE D-19 19 On-site, NE 0.5 ml NE D-20 20 On-site, ENE 0.5 mi ENE D-21 21 On-site, ENE 0.5 mi ENE D-22 22 On-site, E 0.5 miE D-23 23 On-site, ESE 0.5 mi ESE D-28 28 On-site, WSW 0.5 mi WSW D-29 29 On-site, W 0.5 miW D-30 30 On-site, WNW 0.5 mi WNW D-31 31 On-site, NW 0.5 ml NW D-32 32 On-site, NNW 0.5 ml NNW D-33 33 3 miles N 3.0 ml N D-34 34 3 miles NNE 3.0 ml NNE D-35 35 3 miles NE 3.0 ml NE D-36 36 3 miles ENE 3.0 ml ENE D-37 37 3 miles E 3.0 ml E D-38 38 3 miles ESE 3.0 ml ESE D-39 39 3 miles SE 3.0 ml SE D-40 40 3 miles SSE 3.0 ml SSE D-41 41 3 miles S 3.0 ml S D-42 42 3 miles SSE 3.0 ml SSE D-43 43 1 mile SSw 1.0 ml SSW D-44 44 1 mile WSW 1.0 mi WSW D-45 45 1 mile W 1.0 miW D-46 46 1 mile WNW 1.0 miWNW 15

Table 5.3 Sampling locations, Duane Arnold Energy Center (continued).

Sampling Location Code Type Sampling Location Description Distance and Direction Point from Site Stack -

D-47 47 I mile WNW 1.0 mi WNW D-48 48 I mile NW 1.0 mi NW D-49 49 Lewis Access, upstream of DAEC 4.0 mi NNW D-50 50 Plant Intake D-51 51 Plant Discharge D-53 53 Treated Municipal Water D-54 54 Inlet, Municipal Water Treatment System D-55 55 On-site Well D-57 57 Farm (Off-site Well) 1.0 mi WSW D-58 58 Farm (Off-site Well) 0.5 mi WSW-SW D-61 61 0.5 mi downstream of plant discharge D-72 72 Farm 2.0 mi SSW D-82 82 On-site, SE 0.5 mi SE D-83 83 On-site, SSE 0.5 mi SSE D-84 84 On-site, S 0.5 miS D-85 85 On-site, SSW 0.5 mi SSW D-86 86 On-site, SW 0.5 mi SW D-91 91 On-site, N 0.5 mi N D-94 94 Farm 2.7 mi N D-96 96 Farm 8.0 mi SSW D-99 99 Pleasant Creek Lake 2.5 mi WNW D-101 101 Farm 4.0 mi E D-106 106 Farm 4.5 mi SE D-107 107 Sewage Effluent Canal On-site D-108 108 Farm 17.3 mi. SW D-109 109 Farm 3.6 mi. SW "C"denotes-control location. All other locations are Indicators.

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Table 5.4 Type and Frequency of collection.

Location Location Type Weekly Monthly Quarterly Semiannually Annually D-1 C AP TLD D-2 C AP, Al TLD D-3 AP TLD D-5 AP, Al TLD D-6 AP TLD D-7 AP, Al TLD D-8 AP, Al TLD D-1 0 AP TLD D-11 AP, Al TLD D-1 3 C AP TLD D-1 5 AP, Al TLD SO D-1 6 AP TLD SO, G D-17 to D-23 TLD D-28 to D-42 TLD D43 to D-48 TLD D-49 C SW F D-50 C SW RS D-51 SW RS D-53 WW D-54 WW D-55 WW D-57 WW G D-58 WW G D-61 F D-63 M G D-72 'WW G D-82 to D-86 TLD D-91 TLD D-94 G D-96 M D-99 SW D-101 M D-106 M G D-107 SW RS D-108 C M G D-109 M G On-site P ME

'C' denotes control location. All other locations are indicators.

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Table 5.5. Sample codes used in 5.4.

Code Description AP Airborne Particulates Al Airborne Iodine TLD Thermoluminescent Dosimeter P 'Precipitation M Milk WW Well Water G Vegetation ME , Meat SO Soil SW Surface Water F Fish BS River Sediment 18

Table 5.6. Missed collections and analyses, Duane Arnold Energy Center.

Sample Collection Date Type Analysis Location(s) or Period Comments Ml 1-131, Gamma D-101 01-06-04 Sample not available; goat dry.

Ml 1-131, Gamma D-101 02-03-04 Sample not available; goat dry.

Ml 1-131, Gamma D-101 03-02-04 Sample not available; goat dry.

TLD Ambient Gamma D-82 2nd Qtr. TLDs lost in the field.

Ml 1-131, Gamma D-101 08-10-04 No milk available.

VE Gamma D-16 10-06-04 Grain was collected, no hay available.

VE Gamma D-72 10-06-04 Grain was collected, no hay available.

Ml 1-131, Gamma D-101 10-19-04 No milk available.

Ml 1-131, Gamma D-101 11-02-04 Sample not available; goat sold.

Ml 1-131, Gamma D-101 12-07-04 No milk available.

In no instance did missed analyses affect minimum sampling requirements as specified in the ODAM.

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Table 5.7 Radiological Environmental Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Linn, Iowa Reporting Period January-December, 2004 (County, State)

Indicator Location with Highest Control Numbe Sample Type and Locations Annual Mean Locations Non-Type Number of LLDD Mean (Fj Mean (Fy Mean (F) Routine (Units) Analyses _ Range' Locatiorf Range' Range' Results!

Airborne GB 624 0.002 0.028 (467/468) D-2, Marion 0.029 (52152) 0.028 (156/156) 0 Particulates (0.007-0.062) 11 mi. SE (0.012-0.055) (0.010-0.062)

(pCem') GS 48 Be-7 0.020 0.068 (36136) D-2, Marion 0.078 (4/4) 0.074 (12/12) 0 (0.045-0.092) 11 mi. SE (0.067-0.094) (0.056-0.094)

Nb-95 0.0014 < LLD < LLD 0 Zr-95 0.0022 < LLD < LLD 0 Ru-103 0.0012 < LLD < LLD 0 Ru-106 0.0102 < LLD < LLD 0 Cs-134 0.0011 < LLD < LLD 0 Cs-137 0.0011 < LLD < LLD 0 Ce-141 0.0021 < LLD < LLD 0 Ce-144 0.0059 < LLD < LLD 0 Airborne Iodine 1-131 312 0.030 < LLD - < LLD 0 (pCimr')

TLD, AP Locations Gamma 48 1.0 16.2 (36/36) D-8, Urbana 19.6 (4/4) 14.6 (12112) 0 (mR/quarter) (12.6-20.3) 10 mi. NW (18.1-20.3) (11.5-17.9)

TLD, within 0.5 mi. of Stack Gamma 71 1.0 17.5 (71171) D-31, On-site 21.1 (4/4) None 0 (mR/quarter) (9.5-22.3) 0.5 mi. NW (20.4-22.0)

TLD, within 1.0 mi. of Stack Gamma 24 1.0 18.0 (24/24) D-48, 20.0 (4/4) None 0 (mR/quarter) (11.0-22.5) 1 mi. NW (17.1-22.5)

TLD, within 3.0 ml. of Stack Gamma 40 1.0 16.0 (40/40) D-37, 20.6 (4/4) None 0 (mR/quarter) (10.0-24.5) 3 mi. E (17.1-24.5)

Precipitation (pCUL) H-3 4 161 < LLD - < LLD 0 GS 12 Mn-54 6.4 < LLD - < LLD 0 Fe-59 13.1 < LLD - < LLD 0 Co-58 7.2 < LLD - < LLD 0 Co-60 6.5 < LLD - < LLD 0 Zn-65 12.4 < LLD - < LLD 0 Nb-95 8.3 < LLD < LLD 0 20

Table 5.7 Radiological Environmental Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Unn, Iowa Reporting Period January-December. 2004 (County, State)

Indicator Location with Highest Control Numbe Sample Type and Locations Annual Mean Locations Non-Type Number of LLDE Mean (F7 Mean (FY Mean (Fj Routine (Units) Analyses _ Range' Locatiorf Range' Rangec Results!

Precipitation Zr-95 16.4 < LLD < LLD 0 (pCUL) 1-131 11.9 < LLD < LLD 0 (continued) Cs-134 8.4 < LLD < LLD 0 Cs-137 7.5 < LLD < LLD 0 Ba-140 38.9 < LLD < LLD 0 La-140 10.3 < LLD < LLD 0 Milk (pCI/L) 1-131 69 1.0 < LLD < LLD 0 GS 69 K-40 100 1413 (50/50) D-101, Farm 1669 (12/12) 1331 (19/19) 0 (1162-1798) 4 mi. E (1358-1798) (1072-1493)

Cs-134 15 < LLD < LLD 0 Cs-137 18 < LLD < LLD 0 Ba-140 60 < LLD < LLD 0 La-140 15 < LLD < LLD 0 Ground Water GB 24 1.1 3.9 (16124) D-54, Municipal 6.6 (4/4) None 0 (pCi/L) (1.3-14.7) Water (raw) (3.2-14.7)

H-3 24 163 < LLD < LLD 0 Broadleaf 1-131 5 0.038 < LLD - < LLD 0 Vegetation (pCVg wet) GS 5 K-40 0.5 4.53 (4/4) D-108, Farm 7.47 (1/1) 7.47 (111) 0 (3.57-6.20) 17.3 mi. SW Mn-54 0.035 < LLD < LLD 0 Co-58 0.026 < LLD < LLD 0 Co-60 0.029 < LLD < LLD 0 Nb-95 0.028 < LLD < LLD 0 Zr-95 0.050 < LLD - < LLD 0 Ru-103 0.029 < LLD - < LLD 0 Ru-106 0.23 < LLD - < LLD 0 Cs-134 0.035 < LLD - < LLD 0 Cs-1 37 0.023 < LLD - < LLD 0 Ce-141 0.041 < LLD < LLD 0 Ce-144 0.20 < LLD < LLD 0 21

Table 5.7 Radiological Environmental Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Unn, Iowa Reporting Period January-December, 2004 (County, State)

Indicator Location with Highest Control Numbe Sample Type and Locations Annual Mean Locations Non-Type Number of LLD" Mean (F) Mean (Ft Mean (Fj Routine (Units) Analyses _ Range' Locatiorf Range' Range' Results' Vegetation GS 9 (Grain) K-40 0.5 9.82 (919) D-109, Farm 15.06 (2/2) 9.09 (2/2) 0 (pCIlg wet) (2.16-27.95) 3.6 mi. SW (2.16-27.95) (2.24-15.93)

Mn-54 0.059 < LLD . < LLD 0 Co-58 0.046 < LLD < LLD 0 Co-60 0.055 < LLD < LLD 0 Nb-95 0.051 < LLD < LLD 0 Zr-95 0.11 < LLD < LLD 0 Ru-103 0.032 < LLD < LLD 0 Ru-106 0.37 < LLD < LLD 0 Cs-134 0.040 < LLD < LLD 0 Cs-1 37 0.057 < LLD < LLD 0 Ce-141 0.070 < LLD < LLD 0 Ce-144 0.27 < LLD l < LLD 0 Soil Sr-90 2 0.010 0.050 (2/2) D-15, On-site 0.059 (1/1) None 0 (pCilgwet) (0.041-0.059) 0.5 mL. NW GS 2 K-40 0.5 12.28 (2/2) D-15, On-site 14.71 (1/1) None 0 (9.85-14.71) 0.5 mi. NW Mn-54 0.041 < LLD - None 0 Fe-59 0.13 < LLD - - None . 0 Co-58 0.041 < LLD - None 0 Co-60 0.023 < LLD - None 0 Zn-65 0.12 < LLD None 0 Nb-95 0.055 < LLD - None 0 Zr-95 0.046 < LLD - None 0 Ru-103 0.036 < LLD - None 0 Ru-106 0.26 < LLD - None 0 Cs-134 0.051 < LLD - None 0 Cs-137 0.060 0.16(2/2) D-16, On-site 0.16 (1/1) None 0 (0.15-0.16) 0.5 mi. SSE Ce-141 0.092 < LLD None 0 Ce-144 0.21 < LLD None 0 22

Table 5.7 Radiological Environmental Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility LUnn.Iowa Reporting Period January-December, 2004 (County, State)

Indicator Location with Highest Control Numbei Sample Type and Locations Annual Mean Locations Non-Type Number of LLDO Mean (Fj Mean (FY Mean (Ff Routine (Units) Analyse? Range' Locatiorf Range' Range' Results Surface Water H-3 20 161 396 (3/20) D-107, Onsite 396 (314) < LLD 0 (255-640) Sewage Effluent (255-640)

(pCi/L) K-40 12 0.5 18.13 (12V12) D-107, Onsite 18.13 (12V12) None 0 (8.7-25.1) Sewage Effluent (8.7-25.1) 0 1-131 60 15 <LLD . . <LLD 0 GS 60 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 Nb-95 15 < LLD - - < LLD 0 Zr-95 30 < LLD - - < LLD 0 Cs-134 15 < LLD - < LLD 0 Cs-137 15 < LLD < LLD 0 Ba-140 60 < LLD - LLD 0 La-140 15 < LLD < LLD 0 Sediments GS 6 (pCi/g dry) K-40 1.0 7.02 (414) D-50, 8.24 (212) 8.24 (212) 0 (5.73-8.27) Plant Intake (7.37-9.11) (7.37.9.11)

Mn-54 0.020 < LLD < LLD 0 Fe-59 0.055 < LLD < LLD 0 Co-58 0.027 < LLD < LLD 0 Co-60 0.022 < LLD < LLD 0 Zn-65 0.051 < LLD < LLD 0 Nb-95 0.045 < LLD - < LLD 0 Zr-95 0.055 < LLD - < LLD 0 Ru-103 0.028 < LLD - < LLD 0 Ru-106 0.164 < LLD - < LLD 0 Cs-134 0.026 < LLD < LLD 0 Cs-137 0.017 < LLD < LLD 0 Ce-141 0.066 < LLD < LLD 0 Ce-144 0.12 < LLD < LLD 0 23

Table 5.7 Radiological Environmental Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility LInn, Iowa Reporting Period January-December, 2004 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDD Mean (FJ Mean (Ff Mean (Fj Routine (Units) Analyse? Rangee Locatiorf Range' Range' Results Fish GS 8 (pCilg wet) K-40 1.0 2.70 (414) D-49, 2.83 (414) 2.83 (414) 0 (2.09-3.09) Upstream (2.62-3.01) (2.62-3.01)

Mn-54 0.026 < LLD . < LLD 0 Fe-59 0.088 < LLD . < LLD 0 Co-58 0.029 < LLD < LLD 0 Co-60 0.022 < LLD < LLD 0 Zn-65 0.048 < LLD . < LLD 0 Nb-95 0.044 < LLD - . < LLD 0 Zr-95 0.081 < LLD - . < LLD 0 Ru-103 0.039 < LLD - . < LLD 0 Ru-106 0.19 < LLD - < LLD 0 Cs-134 0.027 < LLD - < LLD 0 Cs-137 0.023 < LLD - < LLD 0 Ce-141 0.074 < LLD - < LLD 0 Ce-144 0.17 < LLD - < LLD 0 8 GB = Gross beta; GS = Gamma spectroscopy b LLD Nominal lower limit of detectionbased on 4.66 sigma counting error for the background sample.

C Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations Is indicated in parentheses (F).

d Locations are specified by: (1) Name and code (Table 5.3); and (2)distance, direction and sector relative to reactor site.

• Non-routine results are those which exced ten times the control station value for the location. If a control station value Is not available, the result Is considered non-routine if It exceeds ten times the preoperational value for the location.

24

Figure 6.1 Radiological Environmental Monitoring Program Sampling Stations near the Duane Arnold Energy Center.

Refer to Table 6.3 for sampling locations and Table 6.4 for Type and Frequency of collection.

25

Figure 6.2 Radiological Environmental Monitoring Program Sampling Stations Outside 0.6 miles from the Duane Arnold Energy Center Refer to Table 5.3 for sampling locations and Table 5.4 for Type and Frequency of collection.

26

6.0 REFERENCES

CITED Arnold, J. R. and H. A. Al-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. 2001 - 2004. Environmental Radiological Monitoring Program for the Duane Arnold Energy Center, Annual Report - Part II, Data Tabulations and Analyses, January - December, 2001 - 2004.

2003. Quality Assurance Program Manual, Rev. 1, 21 October 2003.

2001. Quality Control Procedures Manual, Rev. 0, 21 September 2000.

2003. Quality Control Program, Rev. 1, 21 August 2003.

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, Chicago, Illinois, 369-382.

Hazleton Environmental Sciences . 1982 - 1984. Environmental Radiation Monitoring for the Duane Arnold Energy Center, Annual Report - Part II, Data Tabulations and Analyses, January -

December 1981 - 1983.

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 Health and Data Reports, Vol. 9, Number 12, 730-746.

Teledyne Brown Engineering Environmental Services, Midwest Laboratory. 1984 - 2000. Environmental Radiological Monitoring Program for the Duane Arnold Energy Center, Annual Report - Part II, Data Tabulations and Analyses, January- December, 1983 - 1999.

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

27

- Environmental, Inc.

Midwest Laboratory an Anegheny Tecdlno10g Co.

700 Landwehr Road: Nouhitook, IL 60062-2310 ph. (847) 564-0700

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

January through December, 2004

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

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

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

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

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

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

Attachment A ACCEPTANCE CRITERIA FOR "SPIKED" SAMPLES LABORATORY PRECISION: ONE STANDARD DEVIATION VALUES FOR VARIOUS ANALYSES' One standard deviation Analysis Level for single determination 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-9Ob 2 to 30 pCi/liter or kg 5.0 pCi/liter

> 30 pCi/liter or kg 10% of known value Potassium.40 2 0.1 g/liter or kg 5%of known value Gross alpha 5 20 pCiAiter 5.0 pCi/liter

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

> 100 pCi/liter 5%of known value Tritium 5 4,000 pCi/liter i+/-la = (pCi/liter) =

169.85 x (known) 00933

> 4,000 pCi/liter 10% of known value Radium-226,-228  ? 0.1 pCi/liter 15% of known value Plutonium 2 0.1 pCi/liter, gram, or sample 10% of known value lodine-131, 5 55 pCi/liter 6.0 pCi/liter lodine-129b > 55 pCi/liter 10% of known value Uranium-238, 5 35 pCi/liter 6.0 pCi/liter Nickel-63b > 35 pCi/liter 15% of known value Technetium-99b Iron-55b 50 to 100 pCi/liter 10 pCi/liter

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

' From EPA publication, 'Environmental Radioactivity Laboratory Intercomparison Studies Program, Fiscal Year, 1981-1982, EPA-600/4-B1-004.

b Laboratory limit.

A2

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

Concentration (pCVL)

Lab Code Date Analysis Laboratory ERA Control Resultb Result' Limits STW-1005 02/17/04 Sr-89 36.5 i 6.5 44.9 +/- 4.5 36.2 - 53.6 STW-1005 02/17/04 Sr-90 13.4 +/- 0.8 11.6 +/- 1.2 2.9 - 20.3 STW-1006 02/17/04 Ba-1 33 60.9 +/- 2.8 63.2 +/- 6.3 52.3 - 74.1 STW-1006 02/17/04 Co-60 95.2 +/- 1.5 96.4 +/- 9.6 87.7 - 105.0 STW-1006 02/17/04 Cs-1 34 71.2 +/- 5.4 75.8 +/- 7.6 67.1 - 84.5 STW-1006 02/17/04 Cs-1 37 157.0 +/- 6.5 155.0 +/- 15.5 142.0 - 168.0 STW-1006 02/17/04 Zn-65 103.0 +/- 1.1 102.0 +/- 10.2 84.4 -120.0 STW-1007 02/17/04 Gr. Alpha 15.6 +/- 1.2 16.6 +/- 1.7 7.9 - 25.3 STW-1007 02/17/04 Gr. Beta 46.3 +/- 4.4 41.5 +/- 4.2 32.8 - 50.2 STW-1008 02/17/04 Ra-226 8.7 +/- 0.2 9.3 +/- 0.0 6.9 - 11.7 STW-1008 02/17/04 Ra-228 16.6 +/- 0.4 18.2 +/- 1.8 10.3 - 26.1 STW-1008 02/17/04 Uranium 34.2 +/- 0.8 33.0 +/- 3.3 27.8 - 38.2 STW-1 015 05/18/04 Sr-89 39.7 +/- 3.3 45.9 +/- 5.0 37.2 - 54.6 STW-1 015 05/18/04 Sr-90 12.4 +/- 0.9 11.6 +/-5.0 2.9 - 20.3 STW-1 016 05/18/04 Ba-133 96.9 +/- 2.4 101.0 +/- 10.1 83.5 - 118.0 STW-1016 05/18/04 Co-60 39.9 +/- 0.5 41.6 +/- 5.0 32.9 - 50.3 STW-1016 05/18/04 Cs-1 34 48.8 +/- 0.8 50.5 +/- 5.0 41.8 - 59.2 STW-1016 05/18/04 Cs-137 82.6 +/- 2.3 82.5 +/- 5.0 73.8 - 91.2 STW-1 016 05/18/04 Zn-65 77.5 +/- 1.5 75.2 +/- 7.5 62.2 - 88.2 STW-1 017 05/18/04 Gr. Alpha 32.4 +/- 2.1 38.8 +/- 9.7 22.0 - 55.6 STW-1 017 05/18/04 Gr. Beta 63.4 +/- 3.5 59.6 +/- 10.0 42.3 - 76.9 STW-1018 05/18/04 1-131 25.2 +/- 0.4 25.1 +/-3.0 19.9 - 30.3 STW-1019 05/18/04 Ra-226 16.0 +/- 1.1 17.3 +/- 2.6 12.8 - 21.8 STW-1 019 05/18/04 Ra-228 12.6 +/- 0.9 10.3 +/-2.6 5.8 - 14.8 STW-1 019 05/18/04 Uranium 13.0 +/- 0.0 12.7 +/- 3.0 7.5 - 17.9 STW-1020 05/18/04 H-3 32043 +/- 166 30900 +/- 3090 25600 - 36200 STW-1028 08/17/04 Sr-89 16.1 +/-1.9 20.0 +/- 2.0 11.3 - 28.7 STW-1 028 08/17/04 Sr-90 13.4 +/-0.1 13.6 +/- 1.4 4.9 - 22.3 STW-1029 08/17/04 Ba-133 30.2 +/- 3.9 32.1 +/- 3.2 23.4 - 40.8 STW-1 029 08/17/04 Co-60 24.9 +/- 1.9 24.0 +/- 2.4 15.3 - 32.7 STW-1 029 08/17/04 Cs-134 21.4 +/- 3.4 21.6 +/- 2.2 12.9 - 30.3 STW-1 029 08/17/04 Cs-I 37 205.6 i 4.3 193.0 +/- 19.3 176.0 - 210.0 STW-1 029 08/17/04 Zn-65 145.5 +/- 3.0 143.0 +/- 14.3 118.0 - 168.0 STW-1 030 08/17/04 Gr. Alpha 47.7 i 9.1 57.0 +/- 5.7 32.3 - 81.7 STW-1 030 08/17/04 Gr. Beta 28.1 +/-2.5 20.0 +/- 2.0 11.3 - 28.7 STW-1 030 08/17/04 Gr. Beta 28.1 i2.5 20.0 +/- 2.0 11.3 - 28.7 STW-1 031 08/17/04 Ra-226 6.9 +/-0.5 *6.3 +/- 0.6 4.6 - 7.9 STW-1 031 08/17/04 Ra-228 13.1 +/-1.4 14.7 +/-1.5 8.3 - 21.1 STW-1 031 08/17/04 Uranium 6.0 i 0.1 6.2 +/- 0.6 1.0 - 11.4 Al-1

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

Concentration (pCiVL)

Lab Code Date Analysis Laboratory ERA Control Resultb Resultc Limits STW-1037 11/15/04 Sr-89 42.2 +/-3.5 45.7 +/-5.0 37.0 -51.5 STW-1037 11115/04 Sr-90 37.3 +/- 1.3 36.6 i 5.0 27.9 -45.3 STW-1038 11/15/04 Ba-1 33 75.5 +/-0.8 78.4 i7.8 64.8 -92.0 STW-1038 11/15104 Co-60 12.2 +/-0.7 11.7 +/-5.0 3.0 -20.4 STW-1038 11/15/04 Cs-1 34 43.6 i 0.5 42.9 i 5.0 34.2 - 51.6 STW-1038 11/15/04 Cs-137 59.5 +/- 2.9 60.1 i 5.0 51.4 -68.8 STW-1038 11/15/04 Zn-65 50.7 +/- 3.2 50.9 +/- 5.1 42.1 - 59.7 STW-1039 11/15/04 Gr. Alpha 23.9 +/-2.2 31.7 +/-7.9 18.0 -45.4 STW-1039 11/15/04 Gr. Beta 35.8 +/- 1.3 36.3 i 5.0 27.6 -45.0 STW-1040 11/15/04 1-131 22.4 +/-1.9 22.0 +/-5.0 16.9 -27.3 STW-1041 11/15/04 Ra-226 9.8 +/-0.4 9.2 +/-1.4 6.8 -11.6 STW-1041 11/15/04 Ra-228 8.6 +/-0.3 7.1 +/- 1.8 7.0 -10.2 STW-1041 11/15/04 Uranium 11.1 +/-0.3 11.4 +/-3.0 6.2 -16.6 STW-1042 11/15/04 H-3 21218.0 +/- 285.0 20700.0 +/- 2070.0 17100.0 -24300.0

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

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

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

A1-2

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

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

2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,120 4.69 4.74 +/- 0.54 3.28 - 6.10 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,150 3.00 3.02 +/- 0.20 2.10 - 3.90 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,180 2.08 1.89 +/- 0.45 1.46 - 2.70 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,180 2.08 2.11 +/- 0.22 1.46 - 2.70 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,30 75.00 84.40 +/- 4.87 52.50 - 97.50 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,60 18.75 19.11 +/- 1.86 13.13 - 24.38 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,60 18.75 22.82 +/- 5.41 13.13 - 24.38 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,90 8.33 9.05 +/- 1.17 5.83 - 10.83 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,90 8.33 7.60 +/- 1.08 5.83 - 10.83 Environmental, Inc.

2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,30 61.96 73.50 +/- 2.58 43.37 - 80.55 2003-2 CaS04: Dy Cards 1/12/2004 Reader 1, 60 15.49 19.70 +/- 0.51 10.84 - 20.14 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,60 15.49 16.93 +/- 1.37 10.84 - 20.14 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,90 6.88 8.06 +/- 0.60 4.82 - 8.94 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,90 6.88 6.64 +/- 0.58 4.82 - 8.94 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1, 120 3.87 4.39 +/- 0.17 2.71 - 5.03 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,150 2.48 2.34 +/- 0.18 1.74 - 3.22 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1, 150 2.48 2.51 +/- 0.16 1.74 - 3.22 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,180 1.72 2.01 +/- 0.13 1.20 - 2.24 Environmental. Inc.

2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 30 cr 55.23 61.07 +/- 4.38 38.66 - 71.80 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 30 cr 55.23 62.82 +/- 1.75 38.66 - 71.80 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1.60 cr 13.81 14.10 +/- 0.56 9.67 - 17.95 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1,60 cr 13.81 14.03 +/- 0.48 9.67 - 17.95 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 90 cr 6.14 5.97 +/- 0.21 4.30 - 7.98 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 90 cr 6.14 6.26 +/- 0.14 4.30 - 7.98 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 120 c 3.45 4.40 +/- 0.63 2.42 - 4.49 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 150 ( 2.21 2.34 +/- 0.12 1.55 - 2.87 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 180 ( 1.53 1.65 +/- 0.02 1.07 - 1.99 A2-1

TABLE A-3. In-House tSpike" Samples Concentration (pCi/L)9 Lab Code Sample Date Analysis 'Laboratory results Known. Control Type 2s, n=1b Activity Limitsc SPVE-707 Vegetation 2/20/2004 1-131 (G) 5.68 +/- 0.15 4.93 2.96 - 6.90 SPCH-711 Charcoal 2/20/2004 1-131 (G) 6.35 +/- 0.11 6.94 -3.06 - 16.94.

SPW-721 water 2/20/2004 Ni-63 161.00 +/- 13.20 169.00 101.40 - 236.60 SPAP-733 Air Filter 2/25/2004 Gr. Beta 1.39 +/- 0.02 1.48 -8.52 - 11.48 SPW-735 water 2/25/2004 Cs-1 34 41.59 +/-7.02 39.10 29.10 - 49.10 SPW-735 water 2/25/2004 Cs-137 64.11 +/-7.39 64.56 54.56 - 74.56 SPW-735 water 2125/2004 1-131 36.55 +/- 0.48 40.08 28.08 - 52.08 SPW-735 water 2/2512004 1-131 41.97 +/- 8.93 40.08 28.08 - 52.08 SPMI-737 Milk 2/25/2004 Cs-I 34 37.40 +/- 5.40 39.10 29.10 - 49.10 SPMI-737 Milk 2/25/2004 Cs-I 37 69.13 +/- 9.58 64.56 54.56 - 74.56 SPMI-737 Milk 2/25/2004 1-131 45.03 +/- 0.53 40.08 28.08 - 52.08 SPMI-737 Milk 2/25/2004 1-131 44.43 +/- 9.22 40.08 28.08 - 52.08 SPW-1 109 water 3/18/2004 Fe-55 39.98 +/- 1.72 39.98 23.99 - 55.97 SPW-1496 water 4/7/2004 H-3 80006.60 +/- 776.00 83896.00 67116.80 - 100675.20 SPMI-1683 Milk 4/16/2004 Sr-90 42.80 +/- 1.81 43.43 34.74 - 52.12 SPW-1 683 water 4/16/2004 1-131 54.47 +/- 0.73 66.60 53.28 - 79.92 SPW-1 683 water 4/16/2004 1-131 (G) 65.82 +/- 8.86 66.60 56.60 - 76.60 SPMI-1 685 Milk 4/16/2004 Cs-134 33.60 +/- 4.24 37.29 27.29 - 47.29 SPMI-1685 Milk 4/16/2004 Cs-1 37 61.77 +/-7.59 64.36 54.36 - 74.36 SPMI-1685 Milk 4/16/2004 1-131 65.85 +/- 0.79 66.60 53.28 - 79.92 SPMI-1685 Milk 4/16/2004 1-131 (G) 75.56 +/- 11.86 66.60 56.60 - 76.60 SPMI-1685 Milk 4/16/2004 Sr-90 42.56 +/- 1.66 43.43 34.74 - 52.12 SPW-1686 water 4/16/2004 Cs-1 34 39.31 +/- 4.35 37.29 27.29 - 47.29 SPW-1 686 water 4/16/2004 Cs-1 37 67.73 +/- 7.92 64.36 54.36 - 74.36 SPVE-1 862 Vegetation 4/26/2004 1-131(G) 1.32 +/- 0.03 1.12 0.67 - 1.57 SPCH-1886 Charcoal 4/26/2004 1-131 (G) 2.90 +/- 0.07 2.80 1.68 - 3.92 SPAP-1 888 Air Filter 4/27/2004 Gr. Beta 1.35 +/- 0.02 1.48 -8.52 - 11.48 SPF-1917 Fish 4/29/2004 Cs-1 34 1.44 +/- 0.04 1.47 0.88 - 2.06 SPF-1917 Fish 4/29/2004 Cs-I 37 1.33 +/- 0.06 1.29 0.77 - 1.81 SPW-3151 water 6/24/2004 Fe-55 33.85 +/- 1.61 37.32 22.39 - 52.25 SPW-4232 water 8/4/2004 H-3 80225.00 +/- 785.00 82380.00 65904.00 - 98856.00 SPAP-4234 Air Filter 8/4/2004 Gr. Beta 1.63 +/- 0.02 1.46 -8.54 - 11.46 SPW-5712 water 10/612004 Cs-I 34 61.04 +/- 2.51 63.61 53.61 - 73.61 SPW-5712 water 10/6/2004 Cs-137 62.01 +/- 2.76 63.66 53.66 - 73.66 SPW-5712 water 10/6/2004 Sr-90 48.40 +/- 2.00 42.94 34.35 - 51.53 SPMI-5714 Milk 10/6/2004 Sr-90 41.61 +/- 1.57 42.94 34.35 - 51.53 A3-1

TABLE A-3. In-House 'Spike" Samples Concentration (pCilL)

Lab Code Sample Date Analysis Laboratory results Known Control Type 2s, n=lb Activity Limits' SPMI-7418 Milk 12/22/2004 Cs-1 34 59.09 +/- 2.59 59.25 49.25 -69.25 SPMI-7418 Milk 12/22/2004 Cs-137 65.45 +/- 5.61 63.35 53.35 -73.35 SPW-7420 water 12/22/2004 Cs-I 34 58.42 +/- 1.99 59.25 49.25 - 69.25 SPW-7420 water 12/22/2004 Cs-137 64.26 +/- 4.18 63.35 53.35 -73.35 SPW-7420 water 12122/2004 Sr-89 105.26 +/- 4.21 103.47 82.78 -124.16 SPW-7420 water 12/22/2004 Sr-90 48.24 +/- 1.70 42.72 34.18 -51.26 SPAP-7437 Air Filter 12/22/2004 Gr. Beta 1.65 +/- 0.02 1.45 -8.55 - 11.45 SPF-7524 Fish 12/29/2004 Cs-134 1.11 +/- 0.03 1.27 0.76 - 1.78 SPF-7524 Fish 12/29/2004 Cs-137 1.21 +/-0.05 1.19 0.71 - 1.67 SPW-7526 water 12/29/2004 H-3 78615.70 +/- 773.70 80543.00 64434.40 - 96651.60 SPW-7532 water 12/29/2004 Fe-55 30894.00 +/- 1484.00 32752.00 26201.60 - 39302.40 SPW-7540 water 12/29/2004 Tc-99 30.28 +/- 1.11 32.98 20.98 -44.98 cControl limits are based on Attachment A, Page A2 of this report.

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

A3-2

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

SPCH-712 Charcoal 2/20/2004 1-131(G) 2.24 9.6 SPW-722 Water 2/20/2004 Ni-63 2.64 -0.78 +/- 1.58 20 SPAP-734 Air Filter 2/2512004 Gr. Beta 0.96 -1.02 +/- 0.42 3.2 SPW-736 Water 2/25/2004 Cs-134 2.47 10 SPW-736 Water 2/25/2004 Cs-137 1.91 10 SPW-736 Water 2/25/2004 1-131 0.15 -0.031 +/- 0.10 0.5 SPW-736 Water 2/25/2004 1-131 (G) 3.24 20 SPMI-738 Milk 2/25/2004 Cs-134 2.54 10 SPMI-738 Milk 2/25/2004 Cs-137 5.34 10 SPMI-738 Milk 2/25/2004 1-131 0.16 -0.071 +/- 0.10 0.5 SPMI-738 Milk 2/25/2004 1-131 (G) 5.36 20 SPW-1110 Water 3/18/2004 Fe-55 772.70 168.4 +/- 480.90 1000 SPW-1497 Water 4/7/2004 H-3 152.30 81.4 +/- 79.40 200 SPW-1684 Water 4/16/2004 Cs-134 2.43 10 SPW-1684 Water 4/16/2004 Cs-137 2.53 10 SPW-1684 Water 4/16/2004 1-131 0.50 0.21 +/- 0.26 0.5 SPW-1684 Water 4/16/2004 1-131(G) 4.49 20 SPW-1684 Water 4/16/2004 Sr-89 0.64 0.19 +/- 0.52 5 SPW-1684 Water . 4/16/2004 Sr-90 0.64 0.13 +/- 0.31 1 SPM 1-1686 Milk 4/16/2004 Cs-134 5.00 10 SPM I-1686 Milk 4/16/2004 Cs-137 4.16 10 SPMI-1686 Milk 4/16/2004 1-131 0.45 0.13 +/- 0.24 0.5 SPMI-1686 Milk 4/16/2004 1-131(G) 6.53 20 SPMI-1686 Milk 4/16/2004 Sr-89 0.71 0.11 +/- 0.70 5 SPMI-1686 Milk 4/16/2004 Sr-90 0.71 0.66 +/- 0.40 SPVE-1863 Vegetation 4/26/2004 1-131 (G) 3.55 20 SPCH-1887 Charcoal 4/26/2004 1-131(G) 7.04 9.6 SPAP-1889 Air Filter 4/27/2004 Gr. Beta 0.74 -0.96 +/- 0.35 3.2 SPF-1918 Fish 4/29/2004 Cs-134 7.13 100 SPF-1918 Fish 4/29/2004 Cs-137 6.59 100 SPW-3152 Water 6/24/2004 Fe-55 790.30 -70.0 +/- 474.50 1000 SPW-4233 Water 8/4/2004 H-3 154.23 102.67 +/- 81.38 200 SPAP-4235 Air Filter 8/4/2004 Gr. Beta 0.96 -0.99 +/- 0.38 3.2 SPW-5711 Water 10/6/2004 Co-60 4.26 10 SPW-5711 Water 10/6/2004 Cs-134 6.02 10 SPW-5711 Water 10/6/2004 Cs-137 5.28 10 SPW-5711 Water 10/6/2004 Sr-90 0.61 -0.13 +/- 0.27 1 A4-1

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

SPMI-5713 Milk 10/612004 Cs-134 4.60 10 SPMI-5713 Milk 1016/2004 Cs-137 5.81 10 SPMI-5713 Milk 10/612004 1-131(G) 6.07 20 SPMI-5713 Milk 10/6/2004 Sr-90 0.68 1.4 +/- 0.45 1 SPMI-7419 Milk 12/22/2004 Cs-134 8.66 10 SPMI-7419 Milk 12/22/2004 Cs-1 37 5.61 10 SPMI-7419 Milk 12/22/2004 Sr-90 0.82 1.67 +/- 0.48 1 SPW-7421 Water 12122/2004 Sr-89 1.21 0.58 +/- 0.94 5 SPW-7421 Water 12/22/2004 Sr-90 0.82 0.26 +/- 0.41 1 SPAP-7438 Air Filter 12/22/2004 Gr. Beta 0.93 -0.78 +/- 0.40 3.2 SPF-7525 Fish 12129/2004 Cs-134 8.27 100 SPF-7525 Fish 12/29/2004 Cs-137 10.60 100 SPW-7526 Water 12/29/2004 H-3 164.80 -47.0 +/- 84.60 200 SPW-7533 Water 12/2912004 Fe-55 753.00 118.6 +/- 465.80 1000 SPW-7535 Water 12/29/2004 Ni-63 13.10 4.3 +/- 8.10 20 SPW-7540 Water 12/29/2004 Tc-99 1.19 -0.036 +/- 0.72 10

' Liquid sample results are reported InpCULiter, air filters( pCi/filter), charcoal (pCUcharcoal canister), and solid samples (pCikg).

b Activity reported Isa net activity result. For gamma spectroscopic analysis, activity detected below the LLD value is not reported

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

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

A4-2

TABLE A-5. In-House "Duplicate' Samples Concentration (pCI/L)'

Averaged Lab Code Date Analysis First Result Second Result Result E-30, 31 1/5/2004 Gr. Beta 1.27 i 0.06 1.26 +/- 0.05 1.27 +/- 0.04 E-30. 31 1/5/2004 K-40 1.33 i 0.21 1.11 +/- 0.20 1.22 +/- 0.15 WW-58, 59 1/5/2004 Gr. Beta 4.20 i 1.33 4.46 +/- 1.34 4.33 +/- 0.94 WW-58, 59 1/512004 K-40 2.30 i 0.23 2.70 +/- 0.27 2.50 +/- 0.18 TD-7889, 7890 1/5/2004 H-3 16582.00 i 366.00 16060.00 +/- 360.00 16321.00 +/- 256.69 MI-79, 80 1/7/2004 K-40 1451.50 i 125.90 1383.60 +/- 115.50 1417.55 +/- 85.43 MI-79, 80 17/2004 Sr-90 0.90 i0.31 1.05 +/- 0.34 0.97 +/- 0.23 S-100, 101 1/13/2004 Cs-137 8.50 i 0.23 8.52 +/- 0.21 8.51 +/- 0.16 SW-225, 226 1/13/2004 Gr. Alpha 2.62 i 1.26 2.05 +/- 1.16 2.34 +/- 0.86 SW-225, 226 1/13/2004 Gr. Beta 6.37 i 1.15 4.92 +/- 1.06 5.65 +/- 0.78 U-304, 305 1/16/2004 Gr. Beta 5.18 i 1.38 7.04 +/- 1.53 6.11 +/- 1.03 SW-345, 346 1/27/2004 1-131 1.32 i 0.24 1.56 +/- 0.21 1.44 +/- 0.16 SWT-423,424 1/27/2004 Gr. Beta 2.34 +/- 0.54 2.38 +/- 0.52 2.36 +/- 0.38 SWU-469,470 1/27/2004 Gr. Beta 2.99 +/- 0.57 3.09 +/- 0.67 3.04 +/- 0.44 TD-545, 546 2/2/2004 H-3 658.40 +/- 104.60 712.30 +/- 106.60 685.35 +/- 74.67 MI-524, 525 2/4/2004 K-40 1240.00 +/- 147.90 1265.60 +/- 166.30 1252.80 +/- 111.28 MI-567, 568 2/9/2004 K-40 1322.90 +/- 105.50 1340.80 +/- 112.80 1331.85 +/-77.22 MI-567, 568 2/9/2004 Sr-90 0.98 +/- 0.48 0.79 +/- 0.42 0.89 i 0.32 MI-588, 589 2/11/2004 K-40 1185.70 +/- 157.80 1337.70 +/- 160.00 1261.70 i 112.36 SWU-778. 779 2/24/2004 Gr. Beta 2.55 +/- 0.54 2.53 +/- 0.56 2.54 i 0.39 LW-1014, 1015 3/1/2004 Gr. Beta 1.78 +/- 0.56 2.06 +/- 0.57 1.92 i 0.40 SW-966, 967 3/9/2004 Gr. Alpha 2.70 i 1.43 2.96 +/- 1.63 2.83 i 1.08 SW-966, 967- 3/9/2004 Gr. Beta 8.06 +/- 1.20 7.33 +/- 1.21 7.69 i 0.85 SW-966, 967 3/9/2004 H-3 182.04 i 86.24 198.87 +/- 86.97 190.45 i 61.24 SW-1249, 1250 3/31/2004 Gr. Beta 4.71 i1.11 5.25 +/- 1.10 4.98 i 0.78 LW-1464, 1465 3/31/2004 Gr. Beta 2.13 i 0.52 2.39 +/- 0.53 2.26 i 0.37 AP-1633, 1634 3/31/2004 Be-7 0.05 i 0.02 0.05 +/- 0.02 0.05 +/- 0.01 AP-1714, 1715 3/31/2004 Be-7 0.04 +/- 0.01 0.05 +/- 0.01 0.05 +/- 0.01 TD-1489, 1490 4/1/2004 H-3 681.00 i 110.00 709.00 +/- 111.00 695.00 +/- 78.14 SWT-1299,1300 4/2/2004 Gr. Beta 3.13 i 0.57 3.64 +/- 0.60 3.39 +/- 0.41 DW-1420, 1421 4/2/2004 Gr. Beta 1.29 i 0.83 1.62 +/- 0.87 1.46 +/- 0.60 DW-1510, 1511 4/2/2004 1-131 0.68 +/- 0.27 0.62 +/- 0.36 0.65 +/- 0.23 BS-1537, 1538 4/6/2004 Gr. Beta 6.81 i 1.20 6.76 +/- 1.23 6.78 +/- 0.86 WW-1654,1655 4/13/2004 Gr. Beta 6.83 i 1.17 5.60 +/- 1.12 6.21 +/- 0.81 LW-1680, 1681 4/13/2004 Gr. Beta 2.45 +/- 0.64 2.93 +/- 0.62 2.69 +/- 0.45 MI-1735, 1736 4/14/2004 K-40 1384.90 +/- 182.00 1408.20 +/- 187.90 1396.55 +/- 130.80 MI-1802, 1803 4/19/2004 K-40 1327.50 +/- 109.10 1206.30 +/- 113.30 1266.90 +/- 78.64 MI-1802, 1803 4/19/2004 Sr-90 0.72 +/- 0.40 0.77 +/- 0.41 0.74 +/- 0.28 U-1781,1782 4/21/2004 Gr. Alpha 0.20 i 1.90 -0.30 +/- 2.40 -0.05 +/- 1.53 SWT-1933, 1934 4/27/2004 Gr. Beta 2.60 i 0.55 2.33 +/- 0.52 2.46 +/- 0.38 F-1912, 1913 4/29/2004 H-3 8875.00 i 250.00 9119.00 +/- 253.00 8997.00 +/- 177.84 F-1912,1913 4/29/2004 K-40 3406.90 i 533.30 3550.60 +/- 581.40 3478.75 +/- 394.47 LW-1960, 1961 4/29/2004 Gr. Beta 2.23 i 0.55 2.38 +/- 0.57 2.31 +/- 0.40 A5-1

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)3 Averaged Lab Code Date Analysis First Result Second Result Result BS-2083, 2084 5/3/2004 Be-7 1.10 +/- 0.44 1.17 +/- 0.20 1.14 +/- 0.24 BS-2083, 2084 51312004 Gr. Beta 28.44 +/- 2.27 25.56 +/- 2.04 27.00 +/- 1.53 BS-2083, 2084 513/2004 K-40 6.75 +/- 0.89 6.35 +/- 0.53 6.55 +/- 0.52 BS-2083, 2084 51312004 Sr-90 0.12 +/- 0.04 0.17 +/- 0.05 0.15 +/- 0.03 MI-2225, 2226 5111/2004 K-40 1396.30 +/- 124.20 1227.60 +/- 125.40 1311.95 +/- 88.25 SW-2267, 2268 5111/2004 Gr. Alpha 2.95 +/- 1.44 2.41 +/- 1.37 2.68 +/- 0.99 SW-2267, 2268 5/1112004 Gr. Beta 6.80 +/- 1.18 7.25 +/- 1.21 7.03 +/- 0.84 MI-2437, 2438 5/17/2004 K-40 1549.00 +/- 123.40 1566.20 +/- 118.60 1557.60 +/- 85.58 MI-2437, 2438 5/17/2004 Sr-go 1.83 +/- 0.44 1.99 +/- 0.42 1.91 +/- 0.30 F-2413, 2414 5/20/2004 K-40 2844.60 +/- 550.40 2963.00 +/- 532.30 2903.80 +/- 382.85 S0-2578.2579 5/26/2004 Cs-I 37 0.16 +/- 0.02 0.21 +/- 0.05 0.18 +/- 0.03 SO-2578, 2579 5/2612004 Gr. Beta 28.07 +/- 3.24 28.73 +/- 3.00 28.40 +/- 2.21 S0-2578, 2579 5/26/2004 K-40 19.41 +/- 0.78 18.93 +/- 1.04 19.17 +/- 0.65 SS-2603, 2604 5/26/2004 Cs-I 37 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.02 SS-2603, 2604 5t26/2004 K-40 10.18 +/- 0.63 10.43 +/- 0.56 10.30 +/- 0.42 G-2677, 2678 6/1/2004 Be-7 1.31 +/- 0.25 1.25 +/- 0.23 1.28 +/- 0.17 G-2677, 2678 6/1/2004 Gr. Beta 5.73 +/- 0.12 5.86 +/- 0.12 5.79 +/- 0.09 G-2677, 2678 6/1/2004 K-40 5.56 +/- 0.49 5.78 +/- 0.50 5.67 +/- 0.35 G-2677, 2678 6/1/2004 Sr-90 0.01 +/- 0.00 0.01 +/- 0.01 0.01 +/- 0.00 DW-2700, 2701 6/112004 Gr. Beta 1.82 +/- 1.01 2.66 +/- 0.94 2.24 +/- 0.69 TD-2876, 2877 6/1/2004 H-3 13116.00 +/- 324.00 12746.00 +/- 320.00 12931.00 +/- 227.69 MI-2724, 2725 6/3/2004 K-40 1509.00 +/- 116.10 1489.20 +/- 126.10 1499.10 +/- 85.70 MI-2724, 2725 6/3/2004 Sr-90 1.64 +/- 0.46 1.81 +/- 0.44 1.73 +/- 0.32 BS-2921, 2922 6/3/2004 K-40 8.32 +/- 0.63 8.55 +/- 0.62 8.44 +/- 0.44 TD-2876, 2877 6/4/2004 H-3 13116.00 +/- 324.00 12746.00 +/- 320.00 12931.00 +/- 227.69 BS-2897, 2898 6/4/2004 Gr. Beta 9.31 +/- 1.43 8.82 +/- 1.39 9.06 +/- 1.00 SWU-3092, 3093 6/9/2004 Gr. Beta 1.95 +/- 0.71 2.55 +/- 0.76 2.25 +/- 0.52 CF-2986, 2987 6/1412004 Be-7 0.69 +/- 0.12 0.84 +/- 0.19 0.76 +/- 0.11 CF-2986, 2987 6/14/2004 K-40 4.50 +/- 0.32 3.82 +/- 0.48 4.16 +/- 0.29 MI-2977, 2978 6/15/2004 K-40 1486.70 +/- 120.10 1291.60 +/- 167.40 1389.15 +/- 103.01 MI-3007, 3008 6/15/2004 K-40 1333.90 +/- 121.30 1355.80 +/- 176.50 1344.85 +/- 107.08 W-3031, 3032 6/18/2004 H-3 642.00 +/- 108.00 562.00 +/- 105.00 602.00 +/- 75.31 W-3071, 3072 6/21/2004 H-3 273.00 +/- 94.00 203.00 +/- 92.00 238.00 +/- 65.76 SW-3145, 3 14 6 b 6/2212004 1-131 0.97 +/- 0.20 1.43 +/- 0.20 1.20 +/- 0.14 DW-3278, 3279 6/25/2004 1-131 0.67 +/- 0.26 0.48 +/- 0.25 0.57 +/- 0.18 AP-3922, 3923 6/28/2004 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 AP-3637, 3638 6129/2004 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 LW-3589. 3590 6/30/2004 Gr. Alpha 0.28 +/- 0.55 1.29 +/- 0.89 0.79 +/- 0.53 LW-3589, 3590 6/30/2004 Gr. Beta 1.91 +/- 0.64 2.86 +/- 0.70 2.39 +/- 0.48 LW-3589, 3590 6/30/2004 H-3 8369.20 +/- 262.57 8226.01 +/- 260.51 8297.61 +/- 184.94 AP-3943, 3944 6/30/2004 Be-7 0.08 +/- 0.02 0.09 +/- 0.02 0.08 +/- 0.01 A5-2

TABLE A-5. In-House 'Duplicate' Samples Concentration (pCiVL) 3 Averaged Lab Code Date Analysis First Result Second Result Result E-3327, 3328 7/1/2004 Gr. Beta 121 +/- 0.06 1.35 +/- 0.07 1.28 +/- 0.05 E-3327, 3328 7/1/2004 K-40 1.08 +/- 0.20 1.30 +/- 0.22 1.19 +/- 0.15 G-3377, 3378 7/112004 Be-7 1.10 +/- 0.13 1.16 +/- 0.16 1.13 +/- 0.10 G-3377, 3378 7/112004 Gr. Beta 6.42 +/- 0.19 6.28 +/- 0.19 6.35 +/- 0.13 G-3377, 3378 7/112004 K-40 5.26 +/- 0.31 5.36 +/- 0.28 5.31 +/- 0.21 VE-3681, 3682 7/13/2004 K-40 2.65 +/- 0.45 2.90 +/- 0.61 2.77 +/- 0.38 CF-3707, 3708 7/13/2004 Be-7 1.97 +/- 0.44 2.11 +/- 0.25 2.04 +/- 0.25 CF-3707, 3708 7/13/2004 K-40 5.39 +/- 0.44 4.98 +/- 0.42 5.19 +/- 0.30 SW-3773, 3774 7/14/2004 H-3 10697.20 +/- 295.70 10689.60 +/- 295.70 10693.40 +/- 209.09 LW-3849, 3850 7/14/2004 Gr. Beta 2.21 +/- 0.54 2.32 +/- 0.65 2.27 +/- 0.42 SWU-4307, 4308 7/14/2004 Gr. Beta 3.49 +/- 0.57 3.68 +/- 0.61 3.59 +/- 0.42 MI-4051, 4052 7/28/2004 K-40 1190.70 +/- 204.60 1357.00 +/- 145.90 1273.85 +/- 125.65 VE-4079,4080 7/28/2004 K-40 4.90 +/- 0.51 4.62 +/- 0.61 4.76 +/- 0.40 MI-4163, 4164 7/28/2004 K-40 1422.40 +/- 186.50 1330.80 +/- 181.00 1376.60 +/- 129.95 MI-4163, 4164 7/2812004 Sr-90 0.87 +/- 0.32 1.00 +/- 0.35 0.93 +/- 0.24 WW-4387,4388 813/2004 Gr. Beta 5.94 +/- 0.76 6.28 +/- 0.76 6.11 +/-0.54 MI-4286, 4287 8/4/2004 K-40 1435.20 +/- 76.90 1404.70 +/- 80.54 1419.95 +/- 55.68 MI-4286, 4287 8/412004 Sr-90 1.88 +/-0.40 1.31 +/- 0.35 1.59 +/- 0.26 VE-4370,4371 81412004 H-3 0.54 i 0.08 0.62 +/- 0.08 0.58 +/- 0.06 VE-4408, 4409 8(5/2004 K-40 2.03 +/- 0.39 2.12 +/- 0.32 2.08 i 0.25 VE-4467, 4468 819/2004 K-40 6.28 +/- 0.76 6.11 +/- 0.75 6.20 +/- 0.53 MI-4492, 4493 8/10/2004 K-40 1478.70 +/- 116.70 1472.50 +/- 105.10 1475.60 +/- 78.53 MI-4492, 4493 8110/2004 Sr-90 .1.35 +/- 0.40 1.08 +/- 0.42 1.22 +/- 0.29 MI-4518, 4519 8/11/2004 K-40 1197.30 +/- 158.50 1350.20 +/- 202.30 1273.75 +/- 128.50 VE-4748, 4749 8125/2004 Gr. Beta 2.31 +/- 0.05 2.32 +/- 0.05 2.31 +/- 0.04 VE-4748, 4749 8125/2004 K-40 1.70 +/- 0.25 1.94 +/- 0.31 1.82 +/- 0.20 LW-4769, 4770 8126/2004 Gr. Beta 2.00 +/- 0.58 2.07 +/- 0.58 2.04 +/- 0.41 ME-4905.4906 9/1/2004 Gr. Beta 3.06 +/- 0.10 2.93 +/- 0.10 3.00 +/- 0.07 ME-4905, 4906 9/1/2004 K-40 2.33 +/- 0.67 3.26 +/- 0.58 2.80 +/- 0.44 MI-4926, 4927 911/2004 K-40 1316.20 +/- 115.40 1285.80 + 117.30 1301.00 +/- 82.27 MI-4926, 4927 9/1/2004 Sr-90 3.62 +/- 0.52 2.07 +/- 0.43 2.84 +/- 0.34 VE-5027, 5028 912/2004 Gr. Beta 2.43 +/- 0.07 2.39 +/- 0.06 2.41 +/- 0.05 VE-5027, 5028 9/2/2004 K-40 1.77 +/- 0.20 1.94 +/- 0.31 1.86 +/- 0.18 SW-5003, 5004 917/2004 1-131 1.69 +/- 0.23 1.50 +/- 0.25 1.59 i 0.17 MI-5050, 5051 9/7/2004 K-40 1559.40 +/- 131.80 1560.70 +/- 121.20 1560.05 +/- 89.53 MI-5050, 5051 9/7/2004 Sr-90 2.26 +/- 0.52 1.61 +/- 0.47 1.94 +/- 0.35 WW-5072, 5073 917/2004 Gr. Beta 4.31 +/- 0.70 4.11 +/- 0.69 4.21 i 0.49 SW-5216, 5217 9114/2004 Gr. Alpha 4.34 +/- 1.71 4.30 +/- 1.77 4.32 +/- 1.23 SW-5216, 5217 9/1412004 Gr. Beta 7.97 +/- 1.24 8.58 +/- 1.29 8.27 i 0.89 A5-3

TABLE A-5. In-House 'Duplicate" Samples Concentration (pCi/Lr Averaged Lab Code Date Analysis First Result Second Result Result G-5237, 5238 9/15/2004 Be-7 1.18 i 0.23 1.28 +/- 0.24 1.23 +/- 0.17 G-5237, 5238 9/15/2004 K-40 7.16 + 0.58 7.56 +/- 0.55 7.36 +/- 0.40 LW-5316, 5317 9/16/2004 Gr. Beta 2.76 + 0.58 2.64 +/- 0.54 2.70 +/- 0.40 SS-5450, 5451 9/24/2004 K-40 10.33 i 0.66 10.10 +/- 0.74 10.22 +/- 0.50 AP-6308, 6309 9/27/2004 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 SWU-5495, 5496 9/28/2004 Gr. Beta 3.38 +/- 1.78 4.41 +/- 1.94 3.90 +/- 1.32 AP-6070, 6071 9/28/2004 Be-7 0.08 f 0.01 0.08 +/- 0.01 0.08 +/- 0.01 G-5516, 5517 9/29/2004 Be-7 1.81 +/- 0.29 1.74 +/- 0.30 1.77 +/- 0.21 G-5516, 5517 9/29/2004 K-40 7.35 +/- 0.70 7.43 +/- 0.62 7.39 +/- 0.47 AP-6258, 6259 9/2912004 Be-7 0.07 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 F-7211, 7212 9/29/2004 Cs-1 37 0.04 +/- 0.01 0.05 +/- 0.02 0.05 +/- 0.01 F-7211, 7212 9/29/2004 K-40 2.76 +/- 0.27 3.07 +/- 0.26 2.92 +/- 0.19 BS-5902, 5903 10/1/2004 Co-60 0.25 +/- 0.05 0.26 +/- 0.03 0.25 +/- 0.03 BS-5902, 5903 1011/2004 Co-60 2.53 +/- 0.11 2.52 +/- 0.06 2.52 +/- 0.06 E-5654, 5655 10/4/2004 Gr. Beta 1.40 +/- 0.06 1.32 +/- 0.06 1.36 +/- 0.04 E-5654, 5655 10/412004 K-40 1.32 +/- 0.26 1.22 +/- 0.24 1.27 +/- 0.18 MI-5676, 5677 10/4/2004 K-40 1311.00 +/- 122.00 1398.00 +/- 125.00 1354.50 +/- 87.33 S0-5756, 5757 10/4/2004 Gr. Alpha 7.12 +/- 3.09 6.69 +/- 2.92 6.91 +/- 2.13 S0-5756, 5757 10/4/2004 Gr. Beta 19.66 +/- 2.63 22.32 +/- 2.65 20.99 +/- 1.87 SO-5756, 5757 10/4/2004 K-40 16.45 +/- 0.86 17.52 +/- 0.78 16.99 i0.58 VE-6483, 6484 10/6/2004 K-40 9.35 +/- 0.55 9.88 +/- 0.23 9.61 i 0.30 MI-5923, 5924 10/12/2004 K-40 1333.60 +/- 183.50 1552.40 +/- 179.20 1443.00 i 128.24 SS-6046, 6047 10/13/2004 Cs-137 0.02 +/- 0.01 0.02 +/- 0.01 0.02 +/- 0.01 SS-6046, 6047 10/13/2004 Gr. Beta 7.93 +/- 1.72 9.57 +/- 1.88 8.75 i 1.27 SS-6046, 6047 10113/2004 K40 5.77 +/- 0.42 5.77 +/- 0.40 5.77 +/- 0.29 DW-6208, 6209 10/15/2004 1-131 0.89 +/- 0.26 0.65 i 0.27 0.77 i 0.19 BS-6694, 6695 10/19/2004 K-40 11.84 +/-0.67 12.75 i 0.79 12.29 +/- 0.52 VE-6354, 6355 10/25/2004 Gr. Beta 4.82 +/- 0.14 4.76 i 0.14 4.79 +/- 0.10 VE-6354, 6355 10/25/2004 K-40 4.71 +/- 0.54 4.82 i 0.61 4.77 +/- 0.41 DW-6462, 6463 10/27/2004 Gr. Beta 8.46 +/- 1.27 8.22 i 1.24 8.34 +/- 0.89 LW-6377. 6378 10/28/2004 Gr. Beta 2.18 +/- 0.54 2.33 i 0.53 2.25 +/- 0.38 SS-6504, 6505 10/29/2004 K-40 9.28 +/- 0.61 8.51 i 0.78 8.89 +/- 0.50 LW-6762, 6763 10/31/2004 Gr. Beta 1.85 +/- 0.66 1.69 i 0.64 1.77 +/- 0.46 BS-6576, 6577 11/1/2004 Gr. Beta 11.02 +/- 1.54 13.77 i 1.77 12.40 +/- 1.17 BS-6576, 6577 11/1/2004 K-40 9.43 +/- 0.71 8.84 i 0.68 9.14 +/- 0.49 SO-6715, 6716 11/2/2004 Cs-137 0.29 +/- 0.04 0.33 i 0.06 0.31 +/- 0.04 SO-6715, 6716 11/2/2004 Gr. Alpha 10.94 i 3.95 14.72 +/- 4.16 12.83 +/- 2.87 SO-6715, 6716 11/2/2004 Gr. Beta 21.33 i3.10 24.82 +/- 3.10 23.07 +/- 2.19 SO-6715, 6716 11/2/2004 K-40 10.42 +/- 0.71 12.16 +/- 1.06 11.29 +/- 0.64 VE-6673, 6674 11/8/2004 Gr. Alpha 0.07 i 0.04 0.14 +/- 0.05 0.11 +/- 0.03 VE-6673, 6674 11/8/2004 Gr. Beta 4.50 +/- 0.12 4.48 i 0.12 4.49 +/- 0.09 VE-6673, 6674 11/8/2004 K-40 4.05 +/- 0.49 4.65 +/- 0.55 4.35 +/- 0.37 A54

TABLE A-5. In-House "Duplicate" Samples Concentration (pC iL)a Averaged Lab Code Date Analysis First Result Second Result Result SO-6820, 6821 11/10/2004 K-40 14.41 +/- 1.03 15.01 +/-1.09 14.71 +/- 0.75 SO-6820, 6821 11/10/2004 Sr-90 0.04 +/- 0.02 0.07 +/- 0.02 0.06 +/- 0.02 SWU-7160, 7161 11/30/2004 Gr. Beta 4.39 +/- 1.98 3.09 +/- 1.77 3.74 +/- 1.33 MI-7062, 7063 12/1/2004 K-40 1456.00 +/- 124.80 1640.50 +/- 131.40 1548.25 +/- 90.61 MI-7062, 7063 12/1/2004 Sr-90 1.13 +/- 0.41 0.98 +/- 0.43 1.06 +/- 0.30 S-7281, 7282 12/5/2004 Cs-137 0.82 +/- 0.15 1.16 +/-0.20. 0.99 +/- 0.12 VE-7343, 7344 12/13/2004 Gr. Beta 5.25 +/- 0.14 5.08 +/- 0.14 5.16 +/- 0.10 VE-7343, 7344 12/13/2004 K-40 4.23 +/- 0.71 4.33 +/- 0.69 4.28 +/- 0.49 MI-7317, 7318 121/14/2004 K-40 1702.80 +/- 129.70 1536.80 +/- 115.10 1619.80 +/- 86.70 WW-7375,7376 12/14/2004 Gr. Beta 14.13 +/- 1.03 15.22 +/- 1.06 14.68 +/- 0.74 SWU-7507,7508 12/14/2004 Gr. Beta 4.48 +/- 0.66 5.31 +/- 0.69 4.89 +/- 0.48 DW-7563, 7564 12/2712004 Gr. Beta 1.88 +/- 0.51 2.34 +/- 0.52 2.11 +/- 0.37 P-7698, 7699 12127/2004 H-3 246.01 +/- 95.00 259.06 +/- 95.51 252.53 +/- 67.35 AP-7741, 7742 12/28/2004 Be-7 0.06 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 Note: Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

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

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

A5-5

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

Concentrationb Known Control Lab Code Type Date Analysis Laboratory result Activity Limits' STSO-1022 soil 05/01104 Am-241 65.90 +/- 4.50 66.97 +/- 6.70 *46.88 - 87.06 STSO-1022 soil 05/01/04 Co-57 388.90 +/- 4.00 399.60 +/- 40.00 279.72 - 519.48 STSO-1022 soil 05101104 Co-60 524.80 +/- 7.10 518.00 +/- 51.80 362.60 - 673.40 STSO-1022 soil 05/01104 Cs-1 34 403.40 +/- 4.60 414.40 +/- 41.40 290.08 - 538.72 STSO-1 022 soil 05/01/04 Cs-1 37 829.10 +/-7.60 836.20 +/- 83.62 585.34 - 1088.00 STSO-1022 soil 05/01/04 K-40 620.60 +/- 29.50 604.00 +/- 60.40 422.80 - 785.20 STSO-1022 soil 05/01/04 Ni-63 254.80 +/- 8.40 357.05 +/- 35.70 249.94 - 464.17 STSO-1 022 d e soil 05/01/04 Tc-99 59.00 +/- 6.00 117.66 +/- 11.78 82.36 - 152.96 STSO-1022 d soil 05/01/04 U-233/4 24.70 +/- 3.60 37.00 +/- 3.70 25.90 - 48.40 STSO-1022 d soil 05/01/04 U-238 24.20 +/- 3.50 38.85 +/- 3.90 27.20 - 50.51 STSO-1022 soil 05/01/04 Zn-65 743.00 +/- 13.10 699.30 +/- 69.90 489.51 - 909.09 STAP-1 023 Air Filter 05/01104 Gr. Alpha 0.06 +/- 0.02 0.40 +/- 0.04 0.00 - 0.80 STAP-1 023 Air Filter 05/01/04 Gr. Beta 1.37 +/- 0.08 1.20 +/- 0.12 0.60 - 1.80 STAP-1 024 Air Filter 05/01/04 Am-241 0.08 +/- 0.03 0.10 +/- 0.01 0.07 - 0.13 STAP-1 024 Air Filter 05/01/04 Co-57 2.07 +/- 0.06 2.40 +/- 0.24 1.68 - 3.12 STAP-1024 Air Filter 05/01/04 Co-60 2.11 +/- 0.08 2.30 +/- 0.23 1.61 - 2.99 STAP-1 024 g Air Filter 05/01/04 Cs-134 1.78 +/- 0.08 2.90 +/- 0.29 2.03 - 3.77 STAP-1024 Air Filter 05/01/04 Cs-137 1.76 +/- 0.08 2.00 +/- 0.20 1.40 - 2.60 STAP-1024 Air Filter 05/01/04 Mn-54 2.84 +/- 0.11 3.00 +/- 0.30 2.10 - 3.90 STAP-1024 Air Filter 05/01/04 Pu-238 0.12 +/- 0.01 0.13 + 0.01 0.09 - 0.17 STAP-1024 Air Filter 05/01/04 Pu-239/40 0.08 +/- 0.01 0.09 +/- 0.01 0.06 - 0.12 STAP-1024 Air Filter 05/01/04 Sr-90 0.66 +/- 0.19 0.80 +/- 0.08 0.56 - 1.04 STAP-1024 Air Filter 05/01/04 U-233/4 0.23 +/- 0.03 0.21 +/- 0.02 0.15 - 0.27 STAP-1024 Air Filter 05/01/04 U-238 0.23 +/- 0.03 0.22 +/- 0.02 0.15 - 0.29 STAP-1 024 Air Filter 05/01/04 Zn-65 3.90 +/- 0.22 4.00 +/- 0.40 2.80 - 5.20 STW-1026 water 05/01/04 Am-241 0.56 +/- 0.07 0.60 +/- 0.06 0.42 - 0.78 STW-1026 water 05/01/04 Co-57 184.10 +/- 13.50 185.00 +/- 18.50 129.50 - 240.50 STW-1026 water 05/01/04 Co-60 164.40 +/- 11.70 163.00 +/- 16.30 114.10 - 211.90 STW-1026 water 05/01/04 Cs-1 34 201.10 +/- 14.00 208.00 +/- 20.80 145.60 - 270.40 STW-1026 water 05/01/04 Cs-1 37 245.50 +/- 15.80 250.00 +/- 25.00 175.00 - 325.00 STW-1 026 water 05/01/04 Fe-55 37.60 +/- 25.30 33.00 +/- 3.30 23.10 - 42.90 STW-1026 water 05/01/04 H-3 76.50 +/- 5.40 83.00 +/- 8.30 58.10 - 107.90 STW-1 026 water 05/01/04 Mn-54 272.10 +/- 17.50 267.00 +/- 26.70 186.90 - 347.10 STW-1026 water 05/01/04 Ni-63 94.40 +/- 3.20 100.00 +/- 10.00 70.00 - 130.00 STW-1 026 water 05/01/04 Pu-238 1.11 +/- 0.09 1.20 +/- 0.12 0.84 - 1.56 STW-1026 water 05/01/04 Pu-239/40 0.01 +/- 0.01 0.00 +/- 0.00 0.00 - 0.10 STW-1026 water 05/01/04 Sr-90 6.20 +/- 1.10 7.00 +/- 0.70 4.90 - 9.10 STW-1026 water 05/01/04 Tc-99 10.70 +/- 1.00 10.00 +/- 1.00 7.00 - 13.00 A6-1

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

Concentrationb Known Control Lab Code Type Date Analysis Laboratory result Activity Limits' STW-1026 water 05101/04 U-23314 0.14 +/- 0.02 0.12 +/- 0.01 0.08 - 0.16 STW-1026 water 05/01/04 U-238 0.94 +/- 0.05 0.90 +/- 0.09 0.63 - 1.17 STW-1026 water 05/01/04 Zn-65 219.60 +/- 27.90 208.00 +/- 20.80 145.60 - 270.40 STW-1027 water 05/01/04 Gr. Alpha 1.20 +/-0.10 1.20 +/-0.12 0.00 -2.40 STW-1027 water 05101/04 Gr. Beta 4.30 +/- 0.10 4.10 +/- 0.41 2.05 - 6.15 8Results 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 Bq/kg or Bq/L as requested by the Department of Energy.

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

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

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

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

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

A6-2

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

Concentrationa EML Control Lab Code Type Date Analysis Laboratory results Resultb Limitsc STW-1009 water 03/01104 Am-241 1.21  : 0.02 1.31 0.66 - 1.56 STW-1009 water 03/01/04 Co-60 152.30 i 0.30 163.20 0.87 - 1.17 STW-1009 water 03/01/04 Cs-1 37 50.40 +/- 0.90 51.95 0.90 - 1.25 STW-1009 water 03/01/04 H-3 263.50 +/- 10.00 186.60 0.69 - 1.91 STW-1009 water 03/01/04 Pu-238 1.03 +/- 0.04 1.10 0.68 - 1.33 STW-1009 water 03/01/04 Pu-239140 2.90 +/- 0.10 3.08 0.62 - 1.38 STW-1 009 water 03/01/04 Sr-90 5.20 +/- 0.30 4.76 0.73 - 1.65 STW-1009 water 03/01/04 Uranium 4.35 +/- 0.21 4.62 0.40 - 1.45 STW-1010 water 03/01/04 Gr. Alpha 208.00 +/- 20.70 326.00 0.55 - 1.31 STW-1010 water 03/01/04 Gr. Beta 1063.00 +/- 27.00 1170.00 0.75 - 1.65 STSO-1011 Soil 03/01/04 Am-241 14.10 +/- 4.30 13.00 0.52 - 2.41 STSO-1011 Soil 03/01/04 Cs-1 37 1292.00 +/- 13.00 1323.00 0.74 - 1.40 STSO-1011 Soil 03/01/04 K40 563.00 +/- 83.00 539.00 0.70 - 1.59 STSO-1011 Soil 03/01/04 Pu-239/40 20.70 +/- 1.10 22.82 0.62 - 1.99 STSO-1011 Soil 03/01/04 Sr-90 72.10 +/- 5.80 51.00 0.58 - 2.96 STSO-1011 Soil 03/01/04 Uranium 139.10 +/- 10.20 180.22 0.27 - 1.48 STVE-1012 Vegetation 03/01/04 Am-241 4.50 +/- 0.20 4.93 0.58 - 2.86 STVE-1012 Vegetation 03/01/04 Co-60 14.10 +/- 0.40 14.47 0.64 - 1.49 STVE-1012 Vegetation 03/01/04 Cs-137 573.90 +/- 6.00 584.67 0.75 - 1.48 STVE-1 012 Vegetation 03/01/04 K-40 709.00 +/- 19.30 720.00 0.45 - 1.51 STVE-1012 Vegetation 03/01/04 Pu-239/40 6.60 +/- 0.50 6.81 0.60 - 1.98 STVE-1012 Vegetation 03/01/04 Sr-90 766.50 +/- 51.30 734.00 0.50 - 1.37 STAP-1013 Air Filter 03/01/04

• Am-241 0.11 +/- 0.01 0.10 0.62 - 1.93 STAP-1013 Air Filter 03/01/04 Co-60 30.90 +/- 1.08 35.40 0.74 - 1.25 STAP-1013 d Air Filter 03/01/04 Cs-1 34 12.30 +/- 1.30 18.20 0.70 - 1.21 STAP-1 013 Air Filter 03/01/04 Cs-1 37 24.90 +/- 0.60 26.40 0.72 - 1.32 STAP-1013 Air Filter 03/01/04 Pu-238 0.04 +/- 0.01 0.04 0.61 - 1.55 STAP-1013 Air Filter 03/01/04 Pu-239/40 0.17 +/- 0.02 0.16 0.67 - 1.58 STAP-1013 Air Filter 03/01/04

• Sr-90 1.80 +/- 0.20 1.76 0.62 - 2.26 STAP-1013 Air Filter 03/01/04 Uranium 0.17 +/- 0.01 0.17 0.79 - 2.88 STAP-1014 Air Filter 03/01/04 Gr. Alpha 1.09 +/- 0.06 1.20 0.82 - 1.58 STAP-1014 Air Filter 03/01/04 Gr. Beta 2.68 +/- 0.05 2.85 0.75 - 1.94

' Results are reported In Bq/L with the following exceptions: Air Filters (Bq/Filter), Soil and Vegetation (Bq/kg).

b 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.

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

A7-1

APPENDIX B DATA REPORTING CONVENTIONS B-1

Data Reporting 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 +/-52 Reported result: x +/-s; where x = (1/2) (xi + X2) and s = (1/2) 3.2. Individual results: <L1 , <12 Reported result: <L, where L = lower of L1 and L2 3.3. Individual results: x +/- s, < Reported result: x +/- s if x AL; <L otherwise.

4.0. Computation of Averages 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:

X EX S= n-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-I

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

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

Gross alpha I x10-3 Strontium-89 8,000 Gross beta 1 Strontium-90 500 Iodine-1 3 1 b 2.8 x 10-1 Cesium-137 1,000 Barium-1 40 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

SUMMARY

OF THE LAND USE CENSUS D-1

Appendix D Summary of the Land Use Census The Duane Arnold Energy Land Use Census for 2004 was completed during late September and early October of 2004. All milk animals, residences and gardens greater than 500 square feet were identified within three miles for each of the 16 meteorological sectors. If none were identified within the three mile range, additional surveys were performed out to a distance of five miles. The Cedar River was surveyed by boat on July I 3t, 2004 for water use downstream of the DAEC to Cedar Rapids.

There were 175 vegetable gardens identified during the performance of the 2004 Census.

This number is less than the number of of gardens found in the 2003 survey by 14. There were no changes to the nearest vegetable receptor for any of the 16 direction sectors.

There was one change in the milk animal locations within the 3 mile radius of the plant in the past year. A new goat milk receptor was identified at 3405 Pleasant Creek Road. No changes were identified between 3 and 5 miles.

The locations of the nearest resident for each sector remained the same in 2004.

31 new homes were built or were under construction within three miles of the DAEC, compared to the 21 new homes identified in 2003. Most of the new houses built were located in the sectors between the plant, Palo and Cedar Rapids (SSW to SE).

The Cedar River survey revealed no new withdrawals of river water compared to previous surveys. Irrigation of the strawberry farm in Palo and fishing remain the only food pathway uses of river water between the DAEC and Cedar Rapids.

As a result of the annual land use census, adjustments were made to the MIDAS dose projection software model for the previously noted receptor changes. The REMP sample locations and types were also reviewed for effectiveness. No changes in the REMP sampling regime were warranted.

Pursuant to ESP4.4, no changes were observed offsite that could adversely affect the safe operation of the DAEC or that would warrant a UFSAR update such as new gas pipelines, toxic gas installations or airfield strips.

D-2

APPENDIX E ANNUAL RADIATION DOSE ASSESSMENT E-1

Appendix E Annual Radiation Dose Assessment The annual offsite radiation dose to a member of the public was determined by assessment of environmental dosimeter results and by calculations based on monitored effluent releases.

Section A. Dose Contribution from Direct Radiation Direct radiation dose from the operation of the DAEC was reported by TLDs placed at locations in the surrounding environment as described in the Offsite Dose Assessment Manual (ODAM).

1. Pre-operational and 2004 TLD results were compared using a paired difference test. No significant differences in the TLD populations were observed for the 0.5 mile and one mile TLD populations using a confidence level of 99%.

2. As stated in Part 1, page 8 of this report, no plant effect was indicated by the TLDs when dose results were compared to the estimated average natural background for Middle America.

Section B. Estimated Offsite Dose from Effluent Releases

• The contribution of dose to a member of the public most likely to be exposed from gaseous effluent releases was calculated by the Meteorological Information and Dose Assessment System (MIDAS) computer program in accordance with ODAM. The calculation methods follow those prescribed by Reg. Guide 1.109.

• Because there were no nuclides detected in the environment at or beyond the site boundary that were due to the operation of the DAEC, no comparison of calculated dose from gaseous or liquid releases and dose calculated from environmental contamination was performed.

• Following calculation of offsite doses, the appropriateness of REMP sampling station types and locations was reviewed. The current sampling scheme was determined to be more than adequate for the identified receptors.

• There were no planned releases of liquid radwaste and no nuclides attributable to the operation of the DAEC were identified by the Effluent Controls Program. However, in the course of the performance of the Radiological Environmental Monitoring Program, trace amounts of tritium were identified is outfall from the site sewage treatment plant.

1.) The maximally exposed organ due to liquid effluents was the liver of a child, with an estimated dose equivalent of 7E-08 mrem.

2.) The whole body dose equivalent to the maximally exposed individual due to liquid effluents was 7E-08 mrem.

3.) The maximum dose to air at the site boundary from noble gases released was 5E-04 mrad from gamma radiation at 481 meters SSE.

E-2

4.) The maximum dose to air at the site boundary from noble gases released was 2E-01 mrad beta radiation at 535 meters SSW.

5.) The whole body dose equivalent to the maximally exposed individual from noble gases was 2E-03 mrem, at 805 meters West.

6.) The skin dose equivalent to the maximally exposed individual from noble gases was 2E-03 mrem, at 805 meters West.

7.) The maximally exposed organ due to airborne lodines and particulates with half-lives greater than eight days was the skin of a child at 805 meters W, with an estimated dose equivalent of 2E-02 mrem.

==

Conclusion:==

No measurable dose due to the operation of the DAEC was detected by environmental TLDs in 2004. The calculated doses are below the regulatory limits stated in Appendix I to 10 CFR 50 and in 40 CFR 190.

Estimated Maximum Offsite Individual Doses for 2004 Type Age Distance Direction Dose or Dose Annual 10 CFR Group (meters) Equivalent 50, Appendix I (mrem) Limit Direct Radiation None (as measured by TLDs) None Liquid Releases  ;

Whole Body Dose j Child S 7E-08 mrem 3,mrem Organ Dose Liver-C h ild _ _ _ _ _ _

S

_ _ . 7E-08 mrem I _ _

10 mrem Noble Gas Gamma Air Dose 7 481 SSE l5E-04 mrad J 10mrad Beta Air Dose 535 SSW 2E-01 mrad 20 mrad Whole Body All 805 W 2E-03 rnrern 5 rnrern Skin All 805 W 2E-03 mrad 15 mrem Particulates & Iodines Organ Dose 7TChyroid- 805 W j2E-02mremj 15 mrem

• No Appendix I limit but is used to determine compliance with 40 CFR 190 limits of 25 mrem whole body and 75 mrem thyroid.

E-3

\K.

-( Environmental, Inc.

Midwest Laboratory an Alegheny TedcnoIogles Co.

700 Landwehr Road

• N otok IL 60062-2310 ph. (847) 564-0700

• fax (847) 564-4517 DUANE ARNOLD ENERGY CENTER CEDAR RAPIDS, IOWA Docket No. 50-331 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)

ANNUAL REPORT- PART II DATA TABULATIONS AND ANALYSES January 1 to December 31, 2004 Prepared and submitted by ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8001 Reviewed and Approved abotrob, AaS.

I btora~ger

TABLE OF CONTENTS Section Page List of Tables ......................... iii

1.0 INTRODUCTION

........................ v 2.0 LISTING OF MISSED SAMPLES ....................... vi 3.0 DATA TABLES ......................... vii ii

LIST OF TABLES No. Title paae I Airborne particulates collected at Location D-1, (Cedar Rapids), analysis for gross beta .......................................... 1-1 2 Airborne particulates and iodine collected at Location D-2 (Marion), analysis for gross beta and iodine-131 ................... 2-1 3 Airborne particulates collected at Location D-3 (Hiawatha), analysis for gross beta ..... 3-1 4 Airborne particulates and iodine collected at Location D-5 (Palo), analysis for gross beta and iodine-131 ................. 4-1 5 Airborne particulates collected at Location D-6 (Center Point), analysis for gross beta ..... 5-1 6 Airborne particulates and iodine collected at Location D-7, (Shellsburg),

analysis for gross beta and iodine-131 .......................... 6-1 7 Airborne particulates and iodine collected at Location D-8 (Urbana), analysis for gross beta and iodine-131 ................... 7-1 8 Airborne particulates collected at Location D-10 (Atkins), analysis for gross beta .8-1 9 Airborne particulates and iodine collected at Location D-11 (Toddsville),

analysis for gross beta and iodine-131 .......................... 9-1 10 Airborne particulates collected at Location D-13 (Alburnett), analysis for

- gross beta .........  : 10-1 11 Airborne particulates and iodine collected at Location D-15 (on-site, north),

analysis for gross beta and iodine-131 .......................... 11-1 12 Airborne particulates collected at Location D-16 (on-site, south), analysis for gross beta ..... 12-1 13 Airborne particulate samples, quarterly composites of weekly samples, analysis for gamma-emitting isotopes .13-1 14 Ambient gamma radiation (TLD), quarterly exposure .14-1 15 Milk samples, analysis for iodine-131 and gamma emitting isotopes .15-1 16 Ground water samples, analysis for gross beta and tritium .16-1 17 Vegetation samples (broadleaf), analysis for iodine-131 and gamma-emitting isotopes .......... 17-1 iii

LIST OF TABLES (continued)

No. Title Page 18 Vegetation samples (hay and grain), analysis for gamma-emitting isotopes .............. 18-1 19 Surface water samples, analysis for iodine-131 and gamma-emitting isotopes . 19-1 20 Surface water samples, analysis for potassium-40, iodine-131 and gamma-emitting isotopes............................................................................2................20-1 21 Surface water samples, quarterly composites of monthly samples, analysis for tritium .............................................. 21-1 22 Fish samples, analysis for gamma-emitting isotopes .............................................. 22-1 23 River sediment samples, analysis for gamma-emitting isotopes ................................. 23-1 24 Precipitation samples, analysis for gamma-emitting isotopes ..................................... 24-1 25 Precipitation samples, quarterly composites of monthly samples, analysis for tritium ................................................... 25-1 26 Meat samples, analysis for gamma-emitting isotopes ................................................. 26-1 27 Soil samples, analysis for strontium-90 and gamma-emitting isotopes ....................... 27-1 iv

1.0 INTRODUCTION

The following constitutes a supplement to the Annual Report for the Radiological Environmental Monitoring Program conducted at the Duane Arnold Energy Center, Palo, Iowa in 2004. Results of completed analyses are presented in the attached tables.

For information regarding sampling locations, type and frequency of collection, and sample codes, please refer to Part I, Tables 5.3 - 5.5 and Figures 5.1 and 5.2.

V

2.0 LISTING OF MISSED SAMPLES Sample Collection Date Type Analysis Location(s) or Period Comments Ml 1-131, Gamma D-101 01-06-04 Sample not available; goat dry.

Ml 1-131, Gamma D-101 02-03-04 Sample not available; goat dry.

Ml 1-131, Gamma D-101 03-02-04 Sample not available; goat dry.

TLD Ambient Gamma D-82 2nd Qtr. TLDs lost in the field.

Ml 1-131, Gamma D-101 08-10-04 No milk available.

VE Gamma D-16 10-06-04 Grain was collected, no hay available.

VE Gamma D-72 10-06-04 Grain was collected, no hay available.

Ml 1-131, Gamma D-101 10-19-04 No milk available.

Ml 1-131, Gamma D-101 11-02-04 Sample not available; goat sold.

Ml 1-131, Gamma D-101 12-07-04 No milk available.

In no instance did missed analyses affect minimum requirements as specified in the ODAM.

vi

3.0 DATA TABLES vii

DUANE ARNOLD Table 1. Airborne particulates, analysis for gross beta.

Location: D-1 (Cedar Rapids)

Units: pCi/rn3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.039 i 0.004 07-08-04 290 0.025 +/- 0.003 01-15-04 287 0.039 +/- 0.004 07-15-04 285 0.018 +/- 0.003 01-22-04 285 0.028 +/- 0.004 07-22-04 279 0.030 +/- 0.004 01-29-04 286 0.026 +/- 0.003 07-29-04 286 0.023 +/- 0.003 02-05-04 285 0.055 +/- 0.005 08-06-04 316 0.027 +/- 0.003 02-12-04 285 0.056 +/- 0.005 08-12-04 243 0.021 +/- 0.004 02-19-04 286 0.040 +/- 0.004 08-19-04 281 0.028 +/- 0.004 02-26-04 286 0.033 +/- 0.004 08-26-04 279 0.024 +/- 0.003 09-02-04 280 0.020 +/- 0.003 03-04-04 286 0.032 +/- 0.004 03-11-04 285 0.029 +/- 0.004 09-09-04 282 0.029 +/- 0.004 03-18-04 286 0.030 +/- 0.004 09-16-04 279 0.026 +/- 0.003 03-25-04 285 0.015 +/- 0.003 09-23-04 297 0.028 +/- 0.003 04-01-04 289 0.015 +/- 0.003 09-30-04 296 0.024 +/- 0.003 1st Quarter Mean +/- s.d. 0.034 +/- 0.013 3rd Quarter Mean +/- s.d. 0.025 +/- 0.004 04-09-04 320 0.021 +/- 0.003 10-07-04 296 0.022 +/- 0.004 04-15-04 248 0.025 +/- 0.004 10-14-04 294 0.023 +/- 0.003 04-22-04 280 0.024 +/- 0.003 10-21-04 295 0.013 +/- 0.003 04-29-04 290 0.020 +/- 0.003 10-28-04 299 0.036 +/- 0.004 05-06-04 284 0.022 +/- 0.004 11-04-04 299 0.023 +/- 0.004 05-13-04 287 0.028 +/- 0.003 11-11-04 297 0.027 +/- 0.004 05-20-04 283 0.018 +/- 0.003 11-18-04 297 0.031 +/- 0.004 05-27-04 282 0.013 +/- 0.003 11-24-04 253 0.032 +/- 0.004 06-03-04 290 0.013 +/- 0.003 12-02-04 341 0.029 +/- 0.003 06-10-04 285 0.031 +/- 0.004 12-09-04 297 0.037 +/- 0.004 06-17-04 283 0.017 +/- 0.003 12-16-04 284 0.030 +/- 0.004 06-24-04 287 0.018 +/- 0.003 12-22-04 241 0.034 +/- 0.004 07-01-04 282 0.022 +/- 0.003 12-29-04 281 0.041 +/- 0.004 2nd Quarter Mean +/- s.d. 0.021 +/- 0.005 4th Quarter Mean +/- s.d. 0.029 +/- 0.008 Cumulative Average 0.027 Previous Annual Average 0.029 1- 1

DUANE ARNOLD Table 2. Airbome particulates and charcoal canisters, analyses for gross beta and iodine-138L Location: D-2 (Marion)

Units: pCi/ln Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (mi) Gross Beta Collected (i') Gross Beta Required LLD 0.010 Required LLD 0.010 I 01-08-04 329 0.055 +/- 0.004 07-08-04 290 0.029 +/- 0.003 01-15-04 286 0.054 +/- 0.004 07-15-04 284 0.020 +/- 0.004 01-22-04 285 0.032 +/- 0.004 07-22-04 285 0.032 +/- 0.004 01-29-04 286 0.030 +/- 0.004 07-29-04 286 0.027 +/- 0.003 02-05-04 285 0.052 +/- 0.005 08-06-04 323 0.033 +/- 0.003 02-12-04 285 0.054 +/- 0.005 08-12-04 248 0.020 +/- 0.003 02-19-04 285 0.040 +/- 0.004 08-19-04 286 0.028 +/- 0.004 02-26-04 286 0.029 +/- 0.004 08-26-04 284 0.025 +/- 0.003 09-02-04 285 0.020 +/- 0.003 03-04-04 286 0.027 +/- 0.004 03-11-04 285 0.029 +/- 0.004 09-09-04 286 0.032 +/- 0.004 03-18-04 285 0.025 +/- 0.003 09-16-04 285 0.031 +/- 0.004 03-25-04 286 0.020 +/- 0.003 09-23-04 286 0.034 +/- 0.004 04-01-04 287 0.018 +/- 0.003 09-30-04 285 0.033 +/- 0.004 1st Quarter Mean +/- s.d. 3rd Quarter Mean +/- s.d. 0.028 +/- 0.005 04-09-04 324 0.023 +/- 0.003 10-07-04 276 0.023 +/- 0.004 04-15-04 246 0.024 +/- 0.004 10-14-04 286 0.024 +/- 0.003 04-22-04 280 0.026 +/- 0.004 10-21-04 282 0.018 +/- 0.003 04-29-04 290 0.023 +/- 0.004 10-28-04 288 0.038 +/- 0.004 05-06-04 284 0.020 +/- 0.004 11-04-04 287 0.025 +/- 0.004 05-13-04 287 0.032 +/- 0.004 11-11-04 286 0.028 +/- 0.004 05-20-04 284 0.017 +/- 0.003 11-18-04 285 0.033 +/- 0.004 05-27-04 283 0.012 +/- 0.003 11-24-04 244 0.036 +/- 0.005 06-03-04 290 0.013 +/- 0.003 12-02-04 328 0.033 +/- 0.003 06-10-04 285 0.024 +/- 0.004 12-09-04 286 0.038 +/- 0.004 06-17-04 287 0.024 +/- 0.004 12-16-04 285 0.033 +/- 0.004 06-24-04 287 0.019 +/- 0.003 12-22-04 245 0.034 +/- 0.004 07-01-04 282 0.023 +/- 0.003 12-29-04 284 0.052 +/- 0.005 2nd Quarter Mean +/- s.d. 0.022 +/- 0.005 4th Quarter Mean +/- s.d. 0.032 +/- 0.009 Cumulative Average 0.029 Previous Annual Average 0.029 alodine-131 concentrations are <0.07 pCi/rrT unless noted otherwise.

2- 1

DUANE ARNOLD Table 3. Airborne particulates, analysis for gross beta.

Location: D-3 (Hiawatha)

Units: pCi/rnr Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (ma) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 329 0.053 +/- 0.004 07-08-04 289 0.026 +/- 0.003 01 04 286 0.054 +/- 0.004 07-15-04 285 0.020 +/- 0.004 01-22-04 285 0.036 +/- 0.004 07-22-04 285 0.032 +/- 0.004 01-29-04 286 0.031 +/- 0.004 07-29-04 285 0.028 +/- 0.003 02-05-04 286 0.058 +/- 0.005 08-06-04 323 0.026 +/- 0.003 02-12-04 285 0.054 +/- 0.005 08-12-04 248 0.019 +/- 0.003 02-19-04 286 0.042 +/- 0.005 08-19-04 286 0.030 +/- 0.004 02-26-04 286 0.033 +/- 0.004 08-26-04 285 0.023 +/- 0.003 09-02-04 285 0.022 +/- 0.003 03-04-04 286 0.028 +/- 0.004 03-11-04 285 0.024 +/- 0.003 09-09-04 286 0.028 +/- 0.004 03-18-04 285 0.024 +/- 0.003 09-16-04 285 0.027 +/- 0.004 03-25-04 286 0.020 +/- 0.003 09-23-04 297 0.029 +/- 0.004 04-01-04 286 0.014 +/- 0.003 09-30-04 296 0.027 +/- 0.003 1st Quarter Mean +/- s.d. 3rd Quarter Mean +/- s.d. 0.026 +/- 0.004 04-09-04 323 0.025 +/- 0.003 10-07-04 296 0.020 +/- 0.004 04-15-04 247 0.026 +/- 0.004 10-14-04 300 0.024 +/- 0.003 04-22-04 281 0.025 +/- 0.003 10-21 -04 279 0.012 +/- 0.003 04-29-04 288 0.025 +/- 0.004 10-28-04 288 0.035 +/- 0.004 a

05-06-04 287 0.021 +/- 0.004 11-04-04 252 0.021 +/- 0.004 a

05-13-04 286 0.027 +/- 0.003 11-11-04 123 0.027 +/- 0.007 05-20-04 284 0.019 +/- 0.003 11-18-04 297 0.029 +/- 0.004 05-27-04 284 0.010 +/- 0.003 11-24-04 253 0.034 +/- 0.005 06-03-04 290 0.016 +/- 0.003 12-02-04 341 0.028 +/- 0.003 06-10-04 286 0.023 +/- 0.004 12-09-04 297 0.032 +/- 0.004 06-17-04 282 0.016 +/- 0.003 12-16-04 280 0.034 +/- 0.004 06-24-04 288 0.013 +/- 0.003 12-22-04 240 0.027 +/- 0.004 07-01-04 283 0.023 +/- 0.003 12-29-04 278 0.038 +/- 0.004 2nd Quarter Mean +/- s.d. 0.021 +/- 0.005 4th Quarter Mean +/- s.d. 0.028 +/- 0.007 Cumulative Average 0.028 Previous Annual Average 0.028 a Electric off; substation work.

3- 1

DUANE ARNOLD Table 4. Airbome particulates and charcoal canisters, analyses for gross beta and iodine-13eL Location: D-5 (Palo)

Units: pCi/trn Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.057 +/- 0.004 07-08-04 288 0.027 +/- 0.003 01-15-04 286 0.049 +/- 0.004 07-15-04 286 0.021 +/- 0.004 01-22-04 284 0.036 +/- 0.004 07-22-04 290 0.032 +/- 0.004 01-29-04 285 0.032 +/- 0.004 07-29-04 290 0.026 +/- 0.003 02-05-04 287 0.060 +/- 0.005 08-06-04 330 0.027 +/- 0.003 02-12-04 284 0.054 +/- 0.005 08-12-04 254 0.020 +/- 0.003 02-19-04 286 0.062 +/- 0.005 08-19-04 290 0.028 +/- 0.004 02-26-04 286 0.032 +/- 0.004 08-26-04 292 0.020 +/- 0.003 09-02-04 291 0.020 +/- 0.003 03-04-04 285 0.024 +/- 0.004 03-11-04 285 0.023 +/- 0.003 09-09-04 288 0.025 +/- 0.003 03-18-04 286 0.022 +/- 0.003 09-16-04 288 0.023 +/- 0.003 03-25-04 286 0.017 +/- 0.003 09-23-04 289 0.026 +/- 0.003 04-01-04 286 0.017 +/- 0.003 09-30-04 286 0.032 +/- 0.004 1st Quarter Mean +/- s.d. 0.037 +/- 0.017 3rd Quarter Mean +/- s.d. 0.025 +/- 0.004 04-09-04 323 0.024 +/- 0.003 10-07-04 290 0.023 +/- 0.004 04-15-04 245 0.024 +/- 0.004 10-14-04 288 0.029 +/- 0.003 04-22-04 282 0.023 +/- 0.003 10-21-04 287 0.013 +/- 0.003 04-29-04 287 0.023 +/- 0.004 10-28-04 288 0.035 +/- 0.004 05-06-04 286 0.021 +/- 0.004 11-04-04 290 0.025 +/- 0.004 05-13-04 287 0.029 +/- 0.004 11-11-04 287 0.031 +/- 0.004 05-20-04 282 0.019 +/- 0.003 11-18-04 289 0.031 +/- 0.004 05-27-04 276 0.011 +/- 0.003 11-24-04 253 0.034 +/- 0.005 06-03-04 288 0.016 +/- 0.003 12-02-04 331 0.032 +/- 0.003 06-10-04 284 0.022 +/- 0.004 12-09-04 288 0.029 +/- 0.004 06-17-04 284 0.020 +/- 0.004 12-16-04 294 0.030 +/- 0.004 06-24-04 287 0.015 +/- 0.003 12-22-04 252 0.030 +/- 0.004 07-01-04 290 0.024 +/- 0.003 12-29-04 292 0.035 +/- 0.004 2nd Quarter Mean +/- s.d. 0.021 +/- 0.005 4th Quarter Mean +/- s.d. 0.029 +/- 0.006 Cumulative Average 0.028 Previous Annual Averaae 0.028 8 Iodine-131 concentrations are <0.07 pCi/it? unless noted otherwise.

4- 1

DUANE ARNOLD Table 5. Airborne particulates, analysis for gross beta.

Location: D-6 (Center Point)

Units: pCi/rn Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma3 ) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.053 +/- 0.004 07-08-04 288 0.026 +/- 0.003 01-15-04 286 0.052 +/- 0.004 07-15-04 284 0.021 +/- 0.004 01-22-04 285 0.032 +/- 0.004 07-22-04 272 0.028 +/- 0.004 01-29-04 285 0.030 +/- 0.004 07-29-04 285 0.028 +/- 0.003 02-05-04 287 0.062 +/- 0.005 08-06-04 320 0.029 +/- 0.003 02-12-04 284 0.052 +/- 0.005 08-12-04 249 0.022 +/- 0.004 02-19-04 286 0.043 +/- 0.004 08-19-04 284 0.028 +/- 0.004 02-26-04 286 0.027 +/- 0.004 08-26-04 286 0.023 +/- 0.003 09-02-04 286 0.021 +/- 0.003 03-04-04 285 0.028 +/- 0.004 03-11-04 285 0.025 +/- 0.003 09-09-04 285 0.027 +/- 0.004 03-18-04 286 0.019 +/- 0.003 09-16-04 286 0.031 +/- 0.004 03-25-04 286 0.019 +/- 0.003 09-23-04 290 0.030 +/- 0.004 04-01-04 286 0.018 +/- 0.003 09-30-04 265 0.032 +/- 0.004 1st Quarter Mean +/- s.d. 0.035 +/- 0.015 3rd Quarter Mean +/- s.d. 0.027 +/- 0.004 04-09-04 323 0.022 +/- 0.003 10-07-04 292 0.022 +/- 0.004 04-15-04 245 0.023 +/- 0.004 10-14-04 292 0.023 +/- 0.003 04-22-04 283 0.027 +/- 0.004 10-21 -04 287 0.015 +/- 0.003 04-29-04 287 0.026 +/- 0.004 10-28-04 293 0.035 +/- 0.004 05-06-04 287 0.022 +/- 0.004 11-04-04 293 0.021 +/- 0.003 05-13-04 286 0.027 +/- 0.003 11-11-04 287 0.027 +/- 0.004 05-20-04 282 0.016 +/- 0.003 11-18-04 292 0.029 +/- 0.004 05-27-04 285 0.007 +/- 0.003 11-24-04 250 0.038 +/- 0.005 06-03-04 288 0.016 +/- 0.003 12-02-04 334 0.035 +/- 0.004 06-10-04 284 0.021 +/- 0.004 12-09-04 291 0.036 +/- 0.004 06-17-04 284 0.019 +/- 0.004 12-16-04 288 0.034 +/- 0.004 06-24-04 287 0.016 +/- 0.003 12-22-04 247 0.033 +/- 0.004 07-01-04 237 0.022 +/- 0.004 12-29-04 288 0.050 +/- 0.004 2nd Quarter Mean +/- s.d. 0.020 +/- 0.006 4th Quarter Mean +/- s.d. 0.031 +/- 0.009 Cumulative Average 0.028 Previous Annual Average 0.029 5- 1

DUANE ARNOLD Table 6. Airbome particulates and charcoal canisters, analyses for gross beta and iodine-13.

Location: D-7 (Shellsburg)

Units: pCi/mr Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (mi) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.055 +/- 0.004 07-08-04 288 0.028 +/- 0.003 01-15-04 286 0.055 +/- 0.005 07-15-04 287 0.024 +/- 0.004 01-22-04 285 0.031 +/- 0.004 07-22-04 286 0.034 +/- 0.004 01-29-04 285 0.031 +/- 0.004 07-29-04 283 0.026 +/- 0.003 02-05-04 287 0.055 +/- 0.005 08-06-04 323 0.030 +/- 0.003 02-12-04 284 0.049 +/- 0.005 08-12-04 249 0.020 +/- 0.003 02-19-04 286 0.039 +/- 0.004 08-19-04 284 0.031 +/- 0.004 02-26-04 286 0.030 +/- 0.004 08-26-04 286 0.024 +/- 0.003 09-02-04 286 0.024 +/- 0.003 03-04-04 285 0.026 +/- 0.004 03-11-04 285 0.027 +/- 0.003 09-09-04 279 0.033 +/- 0.004 03-18-04 286 0.024 +/- 0.003 09-16-04 280 0.033 +/- 0.004 03-25-04 285 0.022 +/- 0.003 09-23-04 280 0.030 +/- 0.004 04-01-04 286 0.018 +/- 0.003 09-30-04 278 0.033 +/- 0.004 1st Quarter Mean +/- s.d. 0.036 +/- 0.014 3rd Quarter Mean +/- s.d. 0.028 +/- 0.004 04-09-04 323 0.025 +/- 0.003 10-07-04 281 0.025 +/- 0.004 04-15-04 245 0.026 +/- 0.004 10-14-04 280 0.024 +/- 0.003 04-22-04 283 0.028 +/- 0.004 10-21 -04 279 0.010 +/- 0.003 04-29-04 287 0.025 +/- 0.004 10-28-04 280 0.030 +/- 0.004 05-06-04 287 0.019 +/- 0.004 11-04-04 281 0.025 +/- 0.004 05-13-04 288 0.027 +/- 0.003 11-11-04 279 0.018 +/- 0.003 05-20-04 282 0.015 +/- 0.003 11-18-04 280 0.031 +/- 0.004 05-27-04 278 0.012 +/- 0.003 11-24-04 240 0.032 +/- 0.005 06-03-04 288 0.012 +/- 0.003 12-02-04 321 0.027 +/- 0.003 06-10-04 284 0.022 +/- 0.004 12-09-04 279 0.036 +/- 0.004 06-17-04 284 0.020 +/- 0.004 12-16-04 279 0.033 +/- 0.004 06-24-04 287 0.016 +/- 0.003 12-22-04 240 0.029 +/- 0.004 07-01-04 284 0.021 +/- 0.003 12-29-04 279 0.048 +/- 0.004 2nd Quarter Mean +/- s.d. 0.021 +/- 0.006 4th Quarter Mean +/- s.d. 0.028 +/- 0.009 Cumulative Average 0.028 Previous Annual Average 0.029 a lodine-131 concentrations are <0.07 pCi/n? unless noted otherwise.

6- 1

DUANE ARNOLD Table 7. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131'.

Location: D-8 (Urbana)

Units: pCi/rrO Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (ma) Gross Beta Required LLD 0.010 Required LLD 0.010 b

01-08-04 328 0.050 +/- 0.004 07-08-04 288 < 0.003 01-15-04 286 0.053 i 0.004 07-15-04 287 0.019 +/- 0.003 01-22-04 285 0.029 +/- 0.004 07-22-04 279 0.029 +/- 0.004 01-29-04 285 0.030 +/- 0.004 07-29-04 279 0.022 +/- 0.003 02-05-04 286 0.049 +/- 0.004 08-06-04 311 0.027 +/- 0.003 02-12-04 284 0.039 +/- 0.004 08-12-04 244 0.020 +/- 0.003 02-19-04 286 0.036 +/- 0.004 08-19-04 279 0.026 +/- 0.004 02-26-04 286 0.025 +/- 0.004 08-26-04 280 0.023 +/- 0.003 09-02-04 280 0.024 +/- 0.003 03-04-04 285 0.029 +/- 0.004 03-11-04 285 0.029 +/- 0.004 09-09-04 285 0.027 +/- 0.003 03-18-04 286 0.022 +/- 0.003 09-16-04 289 0.030 +/- 0.004 03-25-04 285 0.025 +/- 0.003 09-23-04 289 0.030 +/- 0.004 04-01-04 286 0.016 +/- 0.003 09-30-04 286 0.028 +/- 0.003 Ist Quarter Mean +/- s.d. 0.033 +/- 0.011 3rd Quarter Mean +/- s.d.

04-09-04 323 0.022 +/- 0.003 10-07-04 290 0.028 +/- 0.004 04-15-04 245 0.024 +/- 0.004 10-14-04 289 0.024 +/- 0.003 04-22-04 283 0.021 +/- 0.003 10-21-04 287 0.014 +/- 0.003 04-29-04 287 0.024 +/- 0.004 10-28-04 290 0.037 +/- 0.004 05-06-04 287 0.022 +/- 0.004 11-04-04 289 0.023 +/- 0.004 05-13-04 287 0.026 +/- 0.003 11-11-04 287 0.031 +/- 0.004 05-20-04 283 0.018 +/- 0.003 11-18-04 284 0.028 +/- 0.004 C

05-27-04 285 0.013 +/- 0.003 11-24-04 212 0.045 +/- 0.006 C

06-03-04 288 0.014 +/- 0.003 12-02-04 229 0.052 +/- 0.005 06-10-04 284 0.022 +/- 0.004 12-09-04 288 0.038 +/- 0.004 06-17-04 284 0.020 +/- 0.004 12-16-04 288 0.029 +/- 0.004 06-24-04 287 0.015 +/- 0.003 12-22-04 248 0.030 +/- 0.004 07-01-04 284 0.022 +/- 0.003 12-29-04 287 0.046 +/- 0.004 2nd Quarter Mean +/- s.d. 0.020 +/- 0.004 4th Quarter Mean +/- s.d. 0.033 +/- 0.011 Cumulative Average 0.028 Previous Annual Average 0.029 a lodine-131 concentrations are <0.07 pCi/rr? unless noted otherwise.

D Filter light; loose seal.

c Electric off; line repairs.

7- 1

DUANE ARNOLD Table 8. Airborne particulates, analysis for gross beta.

Location: D-1 0 (Atkins)

Units: pCi/m`

Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (mi) Gross Beta Collected (mi3

) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 327 0.052 +/- 0.004 07-08-04 289 0.026 +/- 0.003 01-15-04 287 0.047 +/- 0.004 07-15-04 289 0.020 +/- 0.004 01-22-04 284 0.030 +/- 0.004 07-22-04 282 0.033 +/- 0.004 01-29-04 286 0.034 +/- 0.004 07-29-04 278 0.025 +/- 0.003 02-05-04 285 0.062 +/- 0.005 08-06-04 330 0.029 +/- 0.003 02-12-04 285 0.055 +/- 0.005 08-12-04 248 0.017 +/- 0.003 02-19-04 286 0.034 +/- 0.004 08-19-04 286 0.029 +/- 0.004 02-26-04 286 0.029 +/- 0.004 08-26-04 285 0.021 +/- 0.003 09-02-04 283 0.019 +/- 0.003 03-04-04 285 0.029 +/- 0.004 03-11-04 285 0.026 +/- 0.003 09-09-04 286 0.029 +/- 0.004 03-18-04 286 0.023 +/- 0.003 09-16-04 285 0.029 +/- 0.004 03-25-04 283 0.018 +/- 0.003 09-23-04 283 0.032 +/- 0.004 04-01-04 288 0.017 +/- 0.003 09-30-04 282 0.031 +/- 0.004 1st Quarter Mean +/- s.d. 0.035 +/- 0.014 3rd Quarter Mean +/- s.d. 0.026 +/- 0.005 04-09-04 319 0.024 +/- 0.003 10-07-04 282 0.024 +/- 0.004 04-15-04 243 0.024 +/- 0.004 10-14-04 286 0.023 +/- 0.003 04-22-04 278 0.025 +/- 0.004 10-21-04 281 0.013 +/- 0.003 04-29-04 289 0.025 +/- 0.004 10-28-04 284 0.034 +/- 0.004 05-06-04 284 0.020 +/- 0.004 11-04 04 285 0.025 +/- 0.004 05-13-04 285 0.028 +/- 0.003 11-11-04 283 0.028 +/- 0.004 05-20-04 282 0.018 +/- 0.003 11-18-04 281 0.031 +/- 0.004 05-27-04 282 0.010 +/- 0.003 11-24-04 242 0.037 +/- 0.005 06-03-04 289 0.013 +/- 0.003 12-02-04 324 0.032 +/- 0.003 06-10-04 285 0.021 +/- 0.004 12-09-04 282 0.037 +/- 0.004 06-17-04 283 0.022 +/- 0.004 12-16-04 287 0.034 +/- 0.004 06-24-04 286 0.018 +/- 0.003 12-22-04 244 0.032 +/- 0.004 07-01-04 282 0.026 +/- 0.004 12-29-04 284 0.048 +/- 0.004 2nd Quarter Mean +/- s.d. 0.021 +/- 0.005 4th Quarter Mean +/- s.d. 0.031 +/- 0.008 Cumulative Average 0.028 Previous Annual Average 0.029 8- 1

DUANE ARNOLD Table 9. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-1381 Location: D-1 1 (Toddville)

Units: pCi/r Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (ma) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.052 +/- 0.004 07-08-04 287 0.025 +/- 0.003 01-15-04 287 0.052 +/- 0.004 07-15-04 287 0.018 +/- 0.003 01-22-04 284 0.032 +/- 0.004 07-22-04 290 0.026 +/- 0.004 01-29-04 286 0.030 +/- 0.004 07-29-04 290 0.026 +/- 0.003 02-05-04 286 0.057 +/- 0.005 08-06-04 331 0.030 +/- 0.003 02-12-04 284 0.052 +/- 0.005 08-12-04 253 0.017 +/- 0.003 02-19-04 286 0.037 +/- 0.004 08-19-04 291 0.025 +/- 0.004 02-26-04 286 0.030 +/- 0.004 08-26-04 290 0.017 +/- 0.003 09-02-04 291 0.021 +/- 0.003 03-04-04 286 0.024 +/- 0.004 03-11-04 285 0.026 +/- 0.003 09-09-04 291 0.030 +/- 0.004 03-18-04 285 0.021 +/- 0.003 09-16-04 291 0.024 +/- 0.003 03-25-04 286 0.019 +/- 0.003 09-23-04 297 0.031 +/- 0.004 04-01-04 286 0.016 +/- 0.003 09-30-04 294 0.033 +/- 0.004 1st Quarter Mean +/- s.d. 0.034 +/- 0.014 3rd Quarter Mean +/- s.d. 0.025 +/- 0.005 04-09-04 323 0.022 +/- 0.003 10-07-04 299 0.025 +/- 0.004 04-15-04 247 0.022 +/- 0.004 10-14-04 298 0.026 +/- 0.003 04-22-04 273 0.024 +/- 0.004 10-21 -04 295 0.016 +/- 0.003 04-29-04 288 0.024 +/- 0.004 10-28-04 298 0.038 +/- 0.004 05-06-04 287 0.020 +/- 0.004 11-04-04 300 0.021 +/- 0.003 05-13-04 286 0.029 +/- 0.004 11-11-04 296 0.029 +/- 0.004 05-20-04 283 0.014 +/- 0.003 11-18-04 297 0.037 +/- 0.004 05-27-04 283 0.013 +/- 0.003 11-24-04 251 0.035 +/- 0.005 06-03-04 289 0.015 +/- 0.003 12-02-04 341 0.033 +/- 0.003 06-10-04 282 0.022 +/- 0.004 12-09-04 298 0.038 +/- 0.004 06-17-04 284 0.021 +/- 0.004 12-16-04 263 0.037 +/- 0.004 06-24-04 289 0.017 +/- 0.003 12-22-04 227 0.036 +/- 0.004 07-01-04 289 0.022 +/- 0.003 12-29-04 284 0.049 +/- 0.004 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 4th Quarter Mean +/- s.d. 0.032 +/- 0.009 Cumulative Average 0.028 Previous Annual Average 0.028 a lodine-131 concentrations are <0.07 pCi/rr? unless noted otherwise.

9- 1

DUANE ARNOLD Table 10. Airborne particulates, analysis for gross beta.

Location: D-1 3 Units: pCi/mrr Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (ma) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.053 +/- 0.004 07-08-04 278 0.030 +/- 0.004 01-15-04 286 0.056 +/- 0.004 07-15-04 280 0.020 +/- 0.004 01-22-04 285 0.035 +/- 0.004 07-22-04 272 0.035 +/- 0.004 01-29-04 285 0.034 +/- 0.004 07-29-04 285 0.024 +/- 0.003 02-05-04 287 0.062 +/- 0.005 08-06-04 339 0.028 +/- 0.003 02-12-04 284 0.056 +/- 0.005 08-12-04 236 0.021 +/- 0.004 02-19-04 286 0.044 +/- 0.005 08-19-04 270 0.026 +/- 0.004 02-26-04 286 0.030 +/- 0.004 08-26-04 271 0.023 +/- 0.003 09-02-04 271 0.023 +/- 0.003 03-0.4-04 285 0.027 +/- 0.004 03-11-04 285 0.026 +/- 0.003 09-09-04 271 0.030 +/- 0.004 03-18-04 286 0.023 +/- 0.003 09-16-04 271 0.032 +/- 0.004 03-25-04 285 0.023 +/- 0.003 09-23-04 272 0.030 +/- 0.004 04-01-04 286 0.017 +/- 0.003 09-30-04 269 0.026 +/- 0.004 1st Quarter Mean +/- s.d. 0.037 +/- 0.015 3rd Quarter Mean +/- s.d. 0.027 +/- 0.005 04-09-04 323 0.022 +/- 0.003 10-07-04 272 0.026 +/- 0.004 04-15-04 245 0.022 +/- 0.004 10-14-04 272 0.026 +/- 0.003 04-22-04 282 0.022 +/- 0.003 10-21 -04 270 0.016 +/- 0.004 04-29-04 288 0.025 +/- 0.004 10-28-04 273 0.036 +/- 0.004 05-06-04 287 0.021 +/- 0.004 11-04-04 272 0.021 +/- 0.004 05-13-04 286 0.028 +/- 0.003 11-11-04 270 0.031 +/- 0.004 05-20-04 283 0.017 +/- 0.003 11-18-04 272 0.032 +/- 0.004 05-27-04 285 0.010 +/- 0.003 11-24-04 235 0.037 +/- 0.005 06-03-04 284 0.013 +/- 0.003 12-02-04 311 0.032 +/- 0.004 06-10-04 284 0.021 +/- 0.004 12-09-04 271 0.037 +/- 0.005 06-17-04 284 0.022 +/- 0.004 12-16-04 279 0.031 +/- 0.004 06-24-04 287 0.017 +/- 0.003 12-22-04 241 0.033 +/- 0.004 07-01-04 230 0.026 +/- 0.004 12-29-04 278 0.049 +/- 0.004 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 4th Quarter Mean +/- s.d. 0.031 +/- 0.008 Cumulative Average 0.029 Previous Annual Average 0.028 10- 1

DUANE ARNOLD Table 11. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-13'L Location: D-15 (On-site)

Units: pCi/trn Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.050 +/- 0.004 07-08-04 289 0.021 +/- 0.003 01-15-04 286 0.056 +/- 0.004 07-15-04 286 0.016 +/- 0.003 01-22-04 285 0.034 +/- 0.004 07-22-04 285 0.026 +/- 0.004 01-29-04 285 0.035 +/- 0.004 07-29-04 285 0.020 +/- 0.003 02-05-04 286 0.056 +/- 0.005 08-06-04 324 0.023 +/- 0.003 02-12-04 284 0.051 +/- 0.005 08-12-04 249 0.018 +/- 0.003 02-19-04 286 0.040 +/- 0.004 08-19-04 284 0.025 +/- 0.004 02-26-04 286 0.029 +/- 0.004 08-26-04 284 0.018 +/- 0.003 09-02-04 287 0.018 +/- 0.003 03-04-04 286 0.024 +/- 0.004 03-11-04 285 0.028 +/- 0.003 09-09-04 288 0.032 +/- 0.004 03-18-04 286 0.027 +/- 0.003 09-16-04 288 0.030 +/- 0.004 03-25-04 2B6 0.024 +/- 0.003 09-23-04 289 0.029 +/- 0.004 04-01-04 286 0.020 +/- 0.003 09-30-04 287 0.029 +/- 0.003 1st Quarter Mean +/- s.d. 0.036 +/- 0.013 3rd Quarter Mean +/- s.d. 0.023 +/- 0.005 04-09-04 323 0.022 +/- 0.003 10-07-04 289 0.026 +/- 0.004 04-15-04 245 0.017 +/- 0.004 10-14-04 289 0.027 +/- 0.003 04-22-04 283 '0.019 +/- 0.003 10-21 -04 286 0.013 +/- 0.003 04-29-04 287 0.022 +/- 0.003 10-28-04 289 0.031 +/- 0.004 05-06-04 286 0.019 +/- 0.003 11-04-04 290 0.025 +/- 0.004 05-13-04 287 0.028 +/- 0.003 11-11-04 287 0.033 +/- 0.004 05-20-04 283 0.016 +/- 0.003 11-18-04 289 0.029 +/- 0.004 05-27-04 285 0.009 +/- 0.003 11-24-04 244 0.033 +/- 0.005 06-03-04 289 0.012 +/- 0.003 12-02-04 332 0.034 +/- 0.004 06-10-04 273 0.023 +/- 0.004 12-09-04 282 0.037 +/- 0.004 06-17-04 285 0.018 +/- 0.003 12-16-04 282 0.033 +/- 0.004 06-24-04 286 0.015 +/- 0.003 12-22-04 243 0.021 +/- 0.004 07-01-04 231 0.017 +/- 0.004 12-29-04 281 0.044 +/- 0.004 2nd Quarter Mean +/- s.d. 0.018 +/- 0.005 4th Quarter Mean +/- s.d. 0.030 +/- 0.008 Cumulative Average 0.027 Previous Annual Averaae 0.029 alodine-131 concentrations are <0.07pCi/rr? unless noted otherwise.

11-1

DUANE ARNOLD Table 12. Airborne particulates, analysis for gross beta.

Location: D-1 6 (On-site)

Units: pCi/mr Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-04 328 0.057 +/- 0.004 07-08-04 288 0.026 +/- 0.003 01-15-04 286 0.052 +/- 0.004 07-15-04 286 0.020 +/- 0.004 01-22-04 285 0.033 +/- 0.004 07-22-04 285 0.031 +/- 0.004 01-29-04 285 0.032 +/- 0.004 07-29-04 285 0.025 +/- 0.003 02-05-04 286 0.062 +/- 0.005 08-06-04 324 0.028 +/- 0.003 02-12-04 285 0.056 +/- 0.005 08-12-04 249 0.022 +/- 0.004 02-19-04 285 0.045 +/- 0.005 08-19-04 284 0.037 +/- 0.004 02-26-04 286 0.031 +/- 0.004 08-26-04 284 0.024 +/- 0.003 09-02-04 287 0.026 +/- 0.003 03-04-04 286 0.018 +/- 0.003 03-11-04 285 0.018 +/- 0.003 09-09-04 282 0.027 +/- 0.004 03-18-04 286 0.018 +/- 0.003 09-16-04 266 0.034 +/- 0.004 03-25-04 285 0.016 +/- 0.003 09-23-04 283 0.028 +/- 0.004 04-01-04 287 0.014 +/- 0.003 09-30-04 280 0.032 +/- 0.003 1st Quarter Mean +/- s.d. 0.035 +/- 0.018 3rd Quarter Mean +/- s.d. 0.028 +/- 0.005 04-09-04 323 0.017 +/- 0.003 10-07-04 283 0.023 +/- 0.004 04-15-04 245 0.016 +/- 0.004 10-14-04 283 0.027 +/- 0.003 04-22-04 283 0.016.+/- 0.003 10-21-04 282 0.015 +/- 0.003 04-29-04 287 0.018 +/- 0.003 10-28-04 283 0.031 +/- 0.004 05-06-04 287 0.018 +/- 0.003 11-04-04 284 0.025 +/- 0.004 05-13-04 287 0.027 +/- 0.003 11-11-04 282 0.030 +/- 0.004 05-20-04 282 0.015 +/- 0.003 11-18-04 283 0.030 +/- 0.004 05-27-04 293 0.010 +/- 0.003 11-24-04 238 0.033 +/- 0.005 06-03-04 280 0.012 +/- 0.003 12-02-04 329 0.029 +/- 0.003 06-10-04 285 0.019 +/- 0.003 12-09-04 264 0.041 +/- 0.005 06-17-04 284 0.020 +/- 0.004 12-16-04 255 0.036 +/- 0.004 06-24-04 285 0.015 +/- 0.003 12-22-04 244 0.037 +/- 0.004 07-01-04 285 0.023 +/- 0.003 12-29-04 283 0.048 +/- 0.004 2nd Quarter Mean +/- s.d. 0.017 +/- 0.004 4th Quarter Mean +/- s.d. 0.031 +/- 0.008 Cumulative Average 0.028 Previous Annual Averaqe 0.029 12- 1

DUANE ARNOLD Table 13. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m3 Location D-1 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 829 DAP-3949 DAP-6097 DAP-7746 Volume (m') 3759 3701 3693 3774 Be-7 0.056 +/- 0.015 0.079 i 0.015 0.085 + 0.019 0.058 i 0.015 Nb-95 < 0.0006 0.0011 < 0.0010 < 0.0008 Zr-95 < 0.0009 0.0017 < 0.0012 < 0.0007 Ru-103 < 0.0010 0.0009 < 0.0008 < 0.0004 Ru-106 < 0.0038 0.0077 < 0.0052 < 0.0021 Cs-134 < 0.0006 0.0007 < 0.0009 < 0.0008 Cs-I 37 < 0.0005 0.0007 < 0.0007 < 0.0006 Ce-141 < 0.0012 0.0021 < 0.0015 < 0.0014 Ce-144 < 0.0034 0.0049 < 0.0054 < 0.0057 Location D-2 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 830 DAP-3950 DAP-6098 DAP-7747 Volume (m') 3756 3709 3713 3662 Be-7 0.069 +/- 0.013 0.082 +/- 0.016 0.094 +/- 0.017 0.067 +/- 0.018 Nb-95 < 0.0006 0.0013 < 0.0010 0.0006 Zr-95 < 0.0012 0.0014 < 0.0015 0.0007 Ru-1 03 < 0.0011 0.0007 < 0.0006 0.0011 Ru-1 06 < 0.0051 0.0047 < 0.0034 0.0039 Cs-134 < 0.0006 0.0007 < 0.0008 0.0007 Cs-137 < 0.0006 0.0009 < 0.0006 0.0004 Ce-141 < 0.0018 0.0019 < 0.0013 0.0017 Ce-144 < 0.0056 0.0039 < 0.0044 0.0060 Location D-3 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 831 DAP-3951 DAP-6099 DAP-7748 Volume (ma) 3757 3709 3735 3524

.Be-7 0.055 +/- 0.017' 0.087 +/- 0.017 .0.088 +/- 0.015 0.045 +/- 0.013 Nb-95 < 0.0007 0.0011 0.0009 < 0.0007 Zr-95 < 0.0014 0.0011 0.0019 < 0.0014 Ru-103 < 0.0009 0.0008 0.0011 < 0.0011 Ru-106 < 0.0059 0.0053 0.0046 < 0.0083 Cs-134 < 0.0008 0.0007 0.0008 < 0.0010 Cs-137 < 0.0008 0.0005 0.0004 < 0.0005 Ce-141 < 0.0009 0.0018 0.0015 < 0.0018 Ce-144 < 0.0025 0.0043 0.0046 < 0.0032 13-1

DUANE ARNOLD Table 13. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCim3 Location D-5 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 832 DAP-3952 DAP-61 00 DAP-7749 Volume (m') 3754 3701 3762 3729 Be-7 0.053 +/- 0.013 0.073 +/- 0.015 0.071 i 0.015 0.054 +/- 0.013 Nb-95 < 0.0010 < 0.0009 < 0.0012 < 0.0012 Zr-95 < 0.0011 < 0.0014 < 0.0018 < 0.0007 Ru-1 03 < 0.0008 < 0.0011 < 0.0006 < 0.0007 Ru-1 06 < 0.0053 < 0.0052 < 0.0052 < 0.0081 Cs-1 34 < 0.0006 < 0.0006 < 0.0009 < 0.0008 Cs-137 < 0.0007- < 0.0006 < 0.0004 < 0.0008 Ce-141 < 0.0014 < 0.0018 < 0.0015 < 0.0018 Ce-144 < 0.0035 < 0.0043 < 0.0046 < 0.0024 Location D-6 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 833 DAP-3953 DAP-6101 DAP-7750 Volume (m') 3755 3658 3680 3734 Be-7 0.054 +/- 0.015 0.088 +/- 0.017 0.080 +/- 0.016 0.058 +/- 0.014 Nb-95 < 0.0010 < 0.0012 0.0010 0.0005 Zr-95 <0.0014 < 0.0018 0.0014 0.0007 Ru-1 03 < 0.0008 < 0.0008 0.0006 0.0008 Ru-1 06 < 0.0041 < 0.0082 0.0068 0.0039 Cs-134 < 0.0006 < 0.0007 0.0008 0.0009 Cs-137 < 0.0007 < 0.0005 0.0005 0.0007 Ce-141 < 0.0010 < 0.0017. 0.0017 0.0019 Ce-144 < 0.0049 < 0.0041 0.0026 0.0055 Location D-7 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 834 DAP-3954 DAP-6102 DAP-7751 Volume (m') 3754 3700 3689 3598 Be-7 0.045 +/- 0.013 0.087 +/- 0.016 0.084 +/- 0.016 0.064 +/- 0.014 Nb-95 < 0.0005 < 0.0008 0.0010 0.0006 Zr-95 < 0.0011 < 0.0021 0.0022 0.0007 Ru-103 < 0.0008 < 0.0009 0.0008 0.0011 Ru-106 < 0.0048 < 0.0058 0.0051 0.0031 Cs-134 < 0.0006 < 0.0006 0.0009 0.0009 Cs-137 < 0.0006 < 0.0008 0.0006 0.0009 Ce-141 *< 0.0010 < 0.0021 0.0013 0.0017 Ce-144 < 0.0041 < 0.0048 0.0032 0.0042 13-2

DUANE ARNOLD Table 13. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCiIm3 Location D-8 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1835 DAP-3955 DAP-6103 DAP-7752 Volume (ma) 3753 3707 3676 3568 Be-7 0.048 + 0.012 0.088 i 0.016 0.081 +/- 0.018 0.062 +/- 0.013 Nb-95 < 0.0010 *< 0.0011 < 0.0009 < 0.0005 Zr-95 < 0.0014 < 0.0011 < 0.0012 < 0.0007 Ru-1 03 < 0.0008 < 0.0009 < 0.0009 < 0.0011 Ru-106 < 0.0044 < 0.0102 < 0.0044 < 0.0027 Cs-I 34 < 0.0006 < 0.0007 < 0.0008 < 0.0009 Cs-i 37 < 0.0007 < 0.0007 < 0.0007 < 0.0006 Ce-141 < 0.0013 < 0.0016 < 0.0012 < 0.0010 Ce-144 < 0,0032 < 0.0045 < 0.0059 < 0.0042 Location D-I 0 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 836 DAP-3956 DAP-6104 DAP-7753 Volume (m') 3753 3687 3706 3645 Be-7 0.064 +/- 0.013 0.077 +/- 0.019 0.084 +/- 0.016 0.070 +/- 0.015 Nb-95 < 0.0008 < 0.0012 < 0.0012 < 0.0008 Zr-95 < 0.0010 < 0.0021 < 0.0012 < 0.0012 Ru-1 03 < 0.0007 < 0.0012 < 0.0006 < 0.0005 Ru-106 < 0.0048 < 0.0058 < 0.0081 < 0.0028 Cs-1 34 < 0.0006 < 0.0006 < 0.0011 < 0.0009 Cs-137 < 0.0011 < 0.0006 < 0.0007 < 0.0010 Ce-141 < 0.0020 < 0.0014 < 0.0015 < 0.0018 Ce-144 < 0.0032 < 0.0052 < 0.0036 < 0.0046 Location D-11 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 837 DAP-3957 DAP-6105 DAP-7754 Volume (m) 3755 3703 3783 3747 Be-7 0.051 +/- 0.012 0.092 +/- 0.019 0.076 +/- 0.015 0.067 +/- 0.018 Nb-95 < 0.0009 < 0.0009 < 0.0011 < 0.0007 Zr-95 < 0.0007 < 0.0017 < 0.0013 < 0.0012 Ru-1 03 < 0.0007 < 0.0010 < 0.0008 < 0.0006 Ru-106 < 0.0068 < 0.0055 < 0.0068 < 0.0044 Cs-134 < 0.0008 < 0.0008 < 0.0008 < 0.0007 Cs-1 37 < 0.0009 < 0.0010 < 0.0005 < 0.0007 Ce-141 < 0.0016 < 0.0019 < 0.0013 < 0.0016 Ce-144 < 0.0052 < 0.0046 < 0.0051 < 0.0051 13-3

DUANE ARNOLD Table 13. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/ms Location D-I 3 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1 838 DAP-3958 DAP-6106 DAP-7755 Volume (m3 ) 3754 3648 3585 3516 Be-7 0.056 +/- 0.014 0.094 +/- 0.018 0.079 +/- 0.017 0.071 +/- 0.019 Nb-95 < 0.0006 < 0.0009 0.0014 < 0.0008 Zr-95 < 0.0014 < 0.0020 0.0009 < 0.0017 Ru-1 03 < 0.0007 < 0.0011 0.0006 < 0.0008 Ru-1 06 < 0.0047 < 0.0043 0.0043 < 0.0032 Cs-134 < 0.0006 < 0.0007 0.0011 < 0.0008 Cs-137 < 0.0006 < 0.0007 0.0007 < 0.0008 Ce-141 < 0.0010 < 0.0021 0.0018 < 0.0021 Ce-144 < 0.0040 < 0.0028 0.0033 < 0.0042 Location D-1 5 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1839 DAP-3959 DAP-6107 DAP-7756 Volume (m') 3755 3643 3725 3683 Be-7 0.056 +/- 0.014 0.077 +/- 0.019 0.075 +/- 0.014 0.049 +/- 0.013 Nb-95 < 0.0009 < 0.0010 0.0009 0.0005 Zr-95 < 0.0021 < 0.0016 0.0017 0.0007 Ru-103 < 0.0010 < 0.0010 0.0006 0.0006 Ru-106 < 0.0063 < 0.0075 0.0052 0.0070 Cs-134 < 0.0007 < 0.0006 0.0007 0.0008 Cs-137 < 0.0006 < 0.0007 0.0005 0.0007 Ce-141 < 0.0012 < 0.0012 0.0020 0.0014 Ce-144 < 0.0026 < 0.0024 0.0033 0.0052 Location D-1 6 Quarter 1st Quarter 2nd Quarter 3rd Quarter *4th Quarter Lab Code DAP-1840 DAP-3960 DAP-6108 DAP-7757 Volume (m') 3755 3706 3683 3593 Be-7 0.060 +/- 0.012 0.065 +/- 0.015 0.071 +/- 0.017 0.053 +/- 0.017 Nb-95 < 0.0011 < 0.0008 0.0011 0.0007 Zr-95 < 0.0011 < 0.0016 0.0011 0.0011 Ru-1 03 < 0.0008 < 0.0009 0.0008 0.0009 Ru-1 06 < 0.0059 < 0.0088 0.0041 0.0033 Cs-134 < 0.0006 < 0.0008 0.0009 0.0009 Cs-137 < 0.0007 < 0.0006 0.0007 0.0010 Ce-141 < 0.0020 < 0.0018 0.0014 0.0016 Ce-144 < 0.0027 < 0.0029 0.0029 0.0034 13-4

DUANE ARNOLD Table 14. Area monitors (TLD), Quarterly Units: mR/91 days Air Stations 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

D-1 (C) 12.8 +/- 0.9 13.1 +/-1.0 14.1 +/- 1.3 11.5 +/- 1.1 D-2 (C) 14.6 +/- 0.5 14.5 +/- 0.7 16.8 +/- 0.7 12.5 +/- 0.7 D-3 14.5 +/- 0.9 14.5 +/- 0.7 16.3 +/- 1.4 13.0 +/- 0.8 D-5 13.4 +/-0.7 14.9 +/- 0.6 15.2 +/- 1.0 14.6 +/- 0.7 D-6 15.3 +/- 0.7 17.1 +/-0.7 17.1 +/-0.9 16.5 +/- 0.7 D-7 14.1 +/- 1.1 16.2 +/- 1.0 16.4 +/- 1.2 15.1 +/- 1.2 D-8 18.1 +/-0.7 20.3 +/- 1.2 19.9 +/- 0.9 20.2 +/- 1.4 D-10 17.5 +/- 0.7 18.4 +/- 0.7 18.7 +/- 0.8 17.0 +/- 1.0 D-11 14.2 +/- 0.7 16.2 +/- 1.8 16.6 +/- 0.7 15.4 +/- 2.0 D-13 (C) 15.3 +/- 0.5 16.9 +/- 0.9 17.9 +/- 0.9 15.1 +/-1.4 D-15 15.6 +/- 0.8 14.5 +/- 0.6 16.5 +/- 1.1 12.6 +/- 0.7 D-16 16.9 +/- 0.7 17.0 +/- 1.7 18.1 +/-0.9 15.4 +/- 2.0 Mean +/- s.d. 15.2 +/- 1.6 16.1 +/-2.0 17.0 +/- 1.5 14.9 +/- 2.4 Within 0.5 mi. of Stack D-17 19.1 +/-0.8 17.3 +/- 1.1 18.3 +/-0.9 17.8 +/- 1.2 D-18 16.6 +/- 1.0 16.5 +/- 1.7 16.0 +/- 1.1 17.3 +/- 2.6 D-19 15.9 +/- 0.7 15.9 +/- 0.9 14.8 +/-0.7 16.1 +/-1.4 D-20 18.2 +/- 1.2 18.6 +/- 1.0 19.0 +/- 1.1 16.3 +/- 0.9 D-21 18.0 +/- 0.9 16.7 +/- 1.3 19.4 +/-0.9 16.6 +/- 1.1 D-22 16.9 +/- 0.9 16.2 +/- 0.9 18.0 +/-0.9 13.4 +/- 1.0 D-23 15.4 +/- 0.6 16.0 +/- 1.0 16.1 +/- 1.1 13.4 +/- 1.2 D-28 19.3 +/- 1.2 20.3 +/- 0.8 21.2 +/- 1.0 18.1 +/- 1.0 D-29 19.7 +/- 0.6 20.7 +/- 1.0 22.1 +/-0.8 19.3 +/- 1.4 D-30 20.2 +/- 0.9 18.2 +/- 1.4 22.3 +/- 1.2 15.9 +/- 1.2 D-31 20.5 +/- 0.9 21.4 +/- 1.2 20.4 +/- 1.3 22.0 +/- 1.5 D-32 21.0 +/- 0.6 19.5 +/- 0.8 20.7 i 0.7 19.4 +/- 1.2 D-82 17.2 +/- 1.2 NDa 18.3 1.4 9.5 +/- 0.7 D-83 18.4 +/- 0.7 15.4 +/- 0.7 19.0 +/-0.8 13.1 +/-0.9 D-84 18.4 +/- 0.8 16.4 +/- 1.1 19.2 +/- 1.4 12.8 +/- 0.8 D-85 18.1 +/-0.6 15.6 +/- 0.9 18.9 +/-0.8 13.0 +/- 1.0 D-86 19.8 +/- 1.4 16.5 +/- 0.9 22.1 +/-1.3 13.5 +/- 0.8 D-91 17.2 +/- 0.6 15.5 +/- 1.8 17.6 1.2 11.6 +/- 1.0 Mean +/- s.d. 18.3 +/- 1.6 17.5 +/- 2.0 19.1 +/-2.2 15.5 +/- 3.2 a"ND" = No data; TLD missing in field due to flood.

14-1

DUANE ARNOLD Table 14. Area monitors (TLD), Quarterly Units: mR191 days Within 1.0 mi. of 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Stack D43 15.7 +/- 0.6 15.5 +/- 1.0 18.8 +/- 1.0 12.8 +/- 0.9 D-44 19.1 +/-0.5 18.7 +/- 0.7 22.0 +/- 0.9 15.4 +/- 0.6 D-45 15.6 +/- 0.9 13.9 +/- 0.7 18.3 +/- 0.9 11.0 +/- 1.1 D-46 19.8 +/- 0.7 19.6 +/- 1.0 22.5 +/- 1.2 16.9 +/- 1.1 D47 18.8 +/- 0.7 19.0 +/- 0.9 21.8 +/- 0.9 16.7 +/- 0.9 D-48 19.8 +/- 0.7 20.5 +/- 1.1 22.5 +/- 1.0 17.1 +/- 1.3 Mean +/- s.d. 18.1 +/-2.0 17.9 +/-2.6 21.0 +/- 1.9 15.0 +/-2.5 Within 3.0 mi. of Stack D-33 15.6 +/- 0.6 14.7 +/- 0.6 16.4 +/- 0.8 11.9 +/-0.7 D-34 15.2 +/- 0.5 13.5 +/- 1.1 18.3 +/- 0.7 10.0 +/- 0.9 D-35 14.8 +/- 0.7 14.1 +/-0.8 17.3 +/- 0.9 12.0 +/- 1.0 D-36 16.0 +/- 0.9 16.0 +/- 0.9 18.8 +/- 1.1 14.1 +/-0.8 D-37 19.8 +/- 1.2 20.9 +/- 1.9 24.5 +/- 1.5 17.1 +/-1.7 D-38 17.3 +/- 1.0 17.8 +/- 1.0 20.5 +/- 1.1 15.7 +/- 1.4 D-39 18.0 +/- 0.8 17.0 +/- 0.8 21.2 +/- 1.0 14.5 +/- 0.8 D-40 14.7 +/-0.7 14.5 +/- 0.7 17.0 +/- 1.0 12.0 +/- 1.0 D-41 16.2 +/- 0.7 14.3 +/- 0.8 17.9 +/- 0.9 11.5 +/- 1.0 D-42 14.4 +/- 0.8 13.8 +/- 1.1 17.9 +/- 0.9 11.1 +/- 1.0 Mean +/- s.d. 16.2 +/- 1.7 15.7 +/-2.3 19.0 +/- 2.4 13.0 +/- 2.3 14-2

DUANE ARNOLD Table 15. Milk samples, analyses for iodine-131 and gamma emitting isotopes.

Collection: Monthly during non-grazing season (October 1 through April 30): biweekly during grazing season (May I through September 30)

Location D-96 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-06-04 DMI -47 < 1.0 1260 i 168 <15 < 18 < 60 <15 02-03-04 DMI -433 < 1.0 1299 +/- 177 < 15 < 18 < 60 < 15 03-02-04 DMI -855 < 1.0 1162 +/- 119 < 15 < 18 < 60 <15 04-06-04 DMI -1468 < 1.0 1200 +/- 190 < 15 < 18 < 60 < 15 05-04-04 DMI -2064 < 1.0 1346 +/- 113 < 15 < 18 <60 < 15 05-18-04 DMI -2385 < 1.0 1287 +/- 165 < 15 < 18 < 60 < 15 06-02-04 DMI -2686 < 1.0 1216 +/- 166 < 15 < 18 < 60 < 15 06-15-04 DMI -2975 < 1.0 1223 +/- 165 < 15 < 18 < 60 < 15 06-29-04 DMI -3252 < 1.0 1246 +/- 175 < 15 <18 < 60 < 15 07-13-04 DMI -3703 < 1.0 1263 +/- 128 < 15 < 18 < 60 < 15 07-27-04 DMI -4018 < 1.0 1302

• 171 < 15 < 18 < 60 < 15 08-10-04 DMI -4460 < 1.0 1286 +/- 117 < 15 <18 < 60 < 15 08-24-04 DMI -4692 < 1.0 1238 +/- 182 < 15 < 18 < 60 < 15 09-08-04 DMI -5074 < 1.0 1355 +/- 123 < 15 < 18 < 60 < 15 09-21-04 DMI-5371 <1.0 1311 +/-185 <15 <18 <60 <15 10-05-04 DMI -5672 < 1.0 1197 +/- 172 < 15 < 18 < 60 < 15 10-19-04 DMI -6171 < 1.0 1469+/-t208 < 15 <18 < 60 < 15 11-02-04 DMI -6495 < 1.0 1252 175 < 15 < 18 <60 < 15 12-07-04 DMI -7168 < 1.0 1250 193 < 15 < 18 <60 <15 Location D-101 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-06-04 NS8 - - - - -

02-03-04 NSa 03-02-04 NS" - - - -

04-06-04 DMI -1469 < 1.0 1358 +/- 162 < 15 <18 < 60 < 15 05-04-04 DMI -2065 < 1.0 1672 +/- 126 < 15 < 18 < 60 < 15 05-18-04 DMI -2386 < 1.0 1764 +/- 143 < 15 < 18 <60 < 15 06-02-04 DMI -2687 < 1.0 1798 +/- 198 < 15 < 18 < 60 < 15 06-15-04 DMI -2976 < 1.0 1777 +/- 138 < 15 < 18 <60 < 15 06-29-04 DMI -3253 <1.0 1701 +/-190 <15 <18 <60 <15 07-13-04 DMI -3704 < 1.0 1726 +/- 191 < 15 <18 < 60 < 15 07-27-04 DMI -4019 < 1.0 1713 +/- 133 < 15 < 18 < 60 < 15 08-10-04 NSa - - - - -

08-24-04 DMI 4693 < 1.0 1785 +/- 189 < 15 < 18 < 60 < 15 09-08-04 DMI -5075 < 1.0 1583 +/- 131 < 15 < 18 < 60 < 15 09-21-04 DMI -5372 < 1.0 1593 +/- 189 < 15 <18 < 60 < 15 10-05-04 DMI -5673 < 1.0 1554 +/- 173 < 15 < 18 < 60 < 15 10-19-04 NS" - - - - -

11-02-04 NSa 12-07-04 NS" aNS= No sample; sample not available. See Table 2.0, "Listing of Missed Samples."

15-1

DUANE ARNOLD Table 15. Milk samples, analyses for iodine-i31 and gamma emiffing isotopes.

Collection: Monthly during non-grazing season (October 1 through April 30): biweekly during grazing season (May 1 through September 30)

Location D-108 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-06-04 DMI -48 < 1.0 1356 +/- 176 < 15 < 18 <60 < 15 02-03-04 DMI -434 < 1.0 1370 +/- 183 < 15 < 18 <60 < 15 03-02-04 DMI -856 < 1.0 1414 +/- 175 < 15 < 18 <60 < 15 04-06-04 DMI -1470 < 1.0 1072 +/- 105 < 15 < 18 <60 < 15 05-04-04 DMI -2066 < 1.0 1415 +/- 185 < 15 < 18 <60 < 15 05-18-04 DMI -2387 < 1.0 1270 +/- 176 < 15 < 18 <60 < 15 06-02-04 DMI -2688 < 1.0 1254 + 163 < 15 < 18 <60 < 15 06-15-04 DMI -2977 < 1.0 1486 +/- 120 < 15 < 18 <60 < 15 06-29-04 DM1 -3254 < 1.0 1434 +/- 175 < 15 < 18 <60 < 15 07-13-04 DMI -3705 < 1.0 1493 +/- 134 < 15 < 18 <60 < 15 07-27-04 DMI -4020 < 1.0 1349 +/- 179 < 15 < 18 <60 < 15 08-10-04 DM1 -4461 < 1.0 1095 +/- 102 < 15 < 18 <60 < 15 08-24-04 DMI -4694 < 1.0 1169 +/- 120 < 15 < 18 <60 < 15 09-08-04 DMI -5076 < 1.0 1281 +/- 186 < 15 < 18 <60 < 15 09-21-04 DMI -5373 < 1.0 1473 +/- 177 < 15 < 18 <60 < 15 10-05-04 DMI -5674 ' 1.0 1310 +/- 225 < 15 < 18 <60 < 15 10-19-04 DMI -6172 < 1.0 1307 +/- 182 < 15 < 18 <60 < 15 11-02-04 DMI -6496 < 1.0 1453 +/- 179 < 15 < 18 <60 < 15 12-07-04 DMI -7169 < 1.0 1294 +/- 177 <15 < 18 <60 < 15 Location . D-109 Date Lab Concentration (pCVL)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-06-04 DMI -49 < 1.0 1284 +/- 125 <15 <18 <60 < 15 02-03-04 DMI -435 < 1.0 1378 +/- 183 < 15 < 18 <60 < 15 03-02-04 DMI -857 < 1.0 1341 +/- 132 < 15 < 18 <60 < 15 04-06-04 DMI -1471 < 1.0 1328 +/- 115 < 15 < 18 <60 < 15 05-04-04 DMI -2067 < 1.0 1245 +/- 187 < 15 ' 18 <60 < 15 05-18-04 DMI -2388 < 1.0 1344 +/- 125 < 15 < 18 <60 < 15 06-02-04 DMI -2689 < 1.0 1235 +/- 175 < 15 < 18 <60 < 15 06-15-04 DMI -2978 < 1.0 1292 +/- 167 < 15 < 18 <60 < 15 06-29-04 DMI -3255 < 1.0 1270 +/- 128 < 15 < 18 <60 < 15 07-13-04 DMI -3706 < 1.0 1328 +/- 178 <15 <18 <60 < 15 07-27-04 DMI -4021 < 1.0 1275 +/- 126 <15 < 18 <60 < 15 08-10-04 DMI -4462 < 1.0 1165 +/- 182 < 15 < 18 <60 < 15 08-24-04 DMI -4695 < 1.0 1278 +/- 186 < 15 < 18 <60 < 15 09-08-04 DMI -5077 < 1.0 1395 +/- 185 < 15 < 18 <60 < 15 09-21-04 DMI -5374 < 1.0 1455 +/- 126 < 15 < 18 <60 < 15 10-05-04 DMI -5675 < 1.0 1284 +/- 162 < 15 <18 '60 < 15 10-19-04 DMI -6173 < 1.0 1258 +/- 171 < 15 <18 <60 < 15 11-02-04 DMI -6497 < 1.0 1346 +/- 175 < 15 < 18 '60 < 15 12-07-04 DMI -7170 < 1.0 1182 +/- 170 < 15 < 18 '60 < 15 15-2

DUANE ARNOLD Table 16. Well water samples, analyses for gross beta and tritium.

Collection: Quarterly Units: pCi/L Location D-53 Treated Municipal Water Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DWW-1 196 DWW-3172 DWW-5630 DWW-7374 Gross Beta 2.3 +/- 0.5 2.5 +/- 0.5 2.0 +/- 0.5 2.2 +/- 0.5 H-3 < 162 < 160 < 163 < 165 Location D-54 Inlet to Municipal Water Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DWW-1 197 DWW-3173 DWW-5631 DWW-7375,6 Gross Beta 3.3 +/- 0.6 5.0 +/- 0.7 3.2 +/- 0.6 14.7 +/- 0.7a H-3 < 157 < 160 < 163 < 165 Location D-55 On-site Well Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DWW-1198 DWW-3174 DWW-5369 DWW-7377 Gross Beta < 0.8 < 0.9 < 0.9 < 0.9 H-3 < 157 < 160 < 162 < 165 Location D-57 Bull Farm Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DWW-1 199 DWW-3175 DWW-5370 DWW-7378 Gross Beta 2.0

• 0.5 1.3 +/- 0.5 1.6 +/- 0.5 1.6 +/- 0.5 H-3 < 157 < 160 < 162 < 165 Location D-58 Franz Farm Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DWW-1200 DWW-3176 DWW-5632 DWW-7379 Gross Beta 5.5 +/- 0.7 4.5 +/- 0.6 5.3 +/- 0.7 4.7 +/- 0.7 H-3 < 157 < 160 < 163 < 158 Location D-72 Van Note Farm Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DWW-1201 DWW-3177 DWW-5633,4 DWW-7380 Gross Beta < 0.8 < 0.9 < 0.9 < 1.1 H-3 < 157 < 160 < 163 < 158 a Analyses for gamma emitting isotopes, strontium-89 and strontium-90 were performed. It was determined that the cause of the higher beta activity was contribution from naturally-occurring isotopes. No plant effect was indicated. Refer to laboratory report no. 8100-100-169.

16-1

DUANE ARNOLD Table 17. Vegetation (broadleaf), analyses for iodine-1 31 and other gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-57 D-72 D-96 D-109 Lab Code DVE-4463 DVE-4464 DVE-4465 DVE-4467,8 Date Collected 8/9/2004 8/9/2004 8/9/2004 8/9/2004 Sample Type Rhubarb Velvet Leaf Rhubarb Velvet Leaf K-40 3.57 +/- 0.51 3.97 +/- 0.73 4.36 +/- 0.46 6.20 +/- 0.53 Mn-54 < 0.025 < 0.031 < 0.018 < 0.035 Co-58 < 0.014 < 0.026 < 0.009 < 0.012 Co-60 < 0.011 < 0.018 < 0.008 < 0.014 Nb-95 < 0.016 < 0.028 < 0.014 < 0.025 Zr-95 < 0.050 < 0.046 < 0.032 < 0.037 Ru-1 03 < 0.014 < 0.029 < 0.012 < 0.017 Ru-106 < 0.15 < 0.18 < 0.11 < 0.15 1-131 < 0.022 < 0.033 < 0.024 < 0.038 Cs-134 < 0.021 < 0.035 < 0.017 < 0.032 Cs-137 < 0.014 < 0.018 < 0.018 < 0.019 Ce-141 < 0.028 < 0.029 < 0.022 < 0.030 Ce-144 < 0.130 < 0.102 < 0.084 < 0.119 Location D-108 (C)

Lab Code DVE-4466 Date Collected 8/9/2004 Sample Type Velvet Leaf K-40 7.47 +/- 0.84 Mn-54 < 0.028 Co-58 < 0.021 Co-60 < 0.029 Nb-95 < 0.028 Zr-95 < 0.042 Ru-i 03 < 0.027 Ru-1 06 < 0.23 1-131 < 0.037 Cs-I 34 < 0.025 Cs-1 37 < 0.023 Ce-141 < 0.041 Ce-144 < 0.203 17-1

DUANE ARNOLD Table 18. Vegetation (hay and grain), analyses for gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-16 D-16 D-57 D-57 D-58 Lab Code NS8 DVE-6483,4 DVE-6491 DVE-6485 DVE-6486 Date Collected 10/6/2004 10/6/2004 10/6/2004 10/6/2004 10/6/2004 Sample Type Hay Soybeans Hay Corn Corn K-40 9.62 +/- 0.30 26.71 +/- 1.00. 2.28 +/- 0.23 2.54 +/- 0.22 Mn-54 < 0.017 < 0.031 < 0.007 < 0.009 Co-58 < 0.019 < 0.028 < 0.010 < 0.010 Co-60 < 0.018 < 0.023 < 0.008 < 0.004 Nb-95 < 0.025 < 0.039 < 0.017 < 0.014 Zr-95 < 0.033 < 0.056 < 0.013 < 0.024 Ru-103 < 0.015 < 0.032 < 0.013 < 0.018 Ru-106 < 0.079 < 0.21 < 0.073 < 0.081 Cs-1 34 < 0.016 < 0.040 < 0.007 < 0.009 Cs-1 37 < 0.019 < 0.026 < 0.009 < 0.012 Ce-141 < 0.034 < 0.070 < 0.020 < 0.033 Ce-144 < 0.058 < 0.15 < 0.045 < 0.049 Location D-72 D-72 D-96 D-96 Lab Code NSa DVE-6490 DVE-6492 DVE-6487 Date Collected 10/6/2004 10/6/2004 11/2/2004 11/2/2004 Sample Type Hay Corn Hay Corn K-40 - 2.63 +/- 0.35 12.14 +/- 0.88 2.36 +/- 0.36 Mn-54 - < 0.015 < 0.030 < 0.012 Co-58 - < 0.020 < 0.028 < 0.013 Co-60 - < 0.012 < 0.034 < 0.011 Nb-95 - < 0.025 < 0.021 < 0.013 Zr-95 - < 0.019 < 0.040 < 0.022 Ru-103 - < 0.018 < 0.026 < 0.011 Ru-106 - < 0.080 < 0.22 < 0.11 Cs-134 - < 0.015 < 0.031 < 0.018 Cs-137 - < 0.010 < 0.039 < 0.010 Ce-141 - < 0.027 < 0.049 < 0.014 Ce-144 - < 0.064 < 0.18 < 0.051

' iNS" = No sample; see Table 2.0, 'Listing of Missed Samples."

18-1

DUANE ARNOLD Table 18. Vegetation (hay and grain), analyses for gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Control Location D-109 D-109 D-108 D-108 Lab Code DVE-6494 DVE-6489 DVE-6493 DVE-6488 Date Collected 11/2/2004 11/2/2004 11/2/2004 11/2/2004 Sample Type Hay Corn Hay Corn K-40 27.95 +/- 1.92 . 2.16 +/- 0.32 15.93 +/- 0.69 2.24 +/- 0.36 Mn-54 < 0.059 < 0.014 < 0.023 < 0.017 Co-58 < 0.046 < 0.009 < 0.013 < 0.012 Co-60 < 0.055 < 0.014 < 0.023 < 0.016 Nb-95 < 0.051 < 0.014 < 0.029 < 0.012 Zr-95 < 0.11 < 0.032 < 0.049 < 0.022 Ru-103 < 0.032 < 0.008 < 0.028 <0.013 Ru-106 < 0.37 < 0.11 < 0.22 < 0.079 Cs-1 34 < 0.034 < 0.011 < 0.031 < 0.015 Cs-1 37 < 0.057 < 0.010 < 0.022 < 0.013 Ce-141 < 0.059 < 0.019 < 0.048 < 0.028 Ce-144 < 0.27 < 0.068 < 0.25 < 0.090 18-2

DUANE ARNOLD Table 19. Surface water samples, analyses for iodine-131 and gamma-emitting isotopes.

Collectior Monthly Units: pCi/L Location: D-49 Date Collected 01-12-04 02-10-04 03-16-04 04-16-04 05-14-04 06-09-04 Lab Code DSW-203 DSW-646 DSW-1190 DSW-1 753 DSW-2378 DSW-3165 Mn-54 < 15 < 15 < 15 <15 < 15 < 15 Fe-59 <30 <30 <30 <30 < 30 <30 Co-58 < 15 < 15 < 15 < 15 < 15 < 15 Co-60 < 15 < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 <15 < 15 < 15 <15 < 15 <15 Zr-95 <30 <30 <30 <30 <30 <30 1.131 < 15 <15 < 15 < 15 < 15 < 15 Cs-I34 <15 <15 < 15 < 15 < 15 < 15 Cs-1 37 <15 <15 < 15 < 15 <15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-1 40 <15 < 15 < 15 < 15 < 15 < 15 Date Collected 07-14-04 08-25-04 09-22-04 10-27-04 11i-10-04 12-08-04 Lab Code DSW-3987 DSW-4696,7 DSW-5362 DSW-6498 DSW-6810 DSW-7368 Mn-54 < 15 <15 < 15 < 15 < 15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 <15 < 15 < 15 < 15 < 15 Co-60 < 15 <15 <15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 < 15 <15 < 15 < 15 < 15 Zr-95 <30 < 30 <30 <30 <30 <30 1-131 < 15 < 15 < 15 < 15 < 15 < 15 Cs-134 < 15 < 15 < 15 < 15 < 15 <15 Cs-137 < 15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 < 15 < 15 <15 < 15 19-1

DUANE ARNOLD Table 19. Surface water samples, analyses for iodine-131 and gamma-emitting isotopes.

Collectior Monthly Units: pCi/L Location: D-50 Date Collected 01-12-04 02-13-04 03-16-04 04-16-04 05-14-04 06-09-04 Lab Code DSW-204 DSW-647 DSW-1191 DSW-1754 DSW-2379,80 DSW-3166 Mn-54 < 15 < 15 < 15 < 15 < 15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 < 15 < 15 < 15 < 15 < 15 Co-60 < 15 < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 < 30 <30 Nb-95 < 15 < 15 < 15 < 15 < 15 < 15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 < 15 < 15 < 15 < 15 < 15 Cs-1 34 < 15 < 15 < 15 < 15 < 15 < 15 Cs-1 37 < 15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 < 15 < 15 < 15 < 15 Date Collected 07-14-04 08-25-04 09-22-04 10-27-04 11-10-04 . 12-08-04 Lab Code DSW-3988 DSW-4698 DSW-5363 DSW-6499 DSW-6811 DSW-7369 Mn-54 < 15 < 15 < 15 < 15 < 15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 < 15 < 15 < 15 < 15 < 15 Co-60 < 15 < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 < 15 < 15 < 15 < 15 <15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 < 15 < 15 < 15 < 15 < 15 Cs-134 < 15 < 15 < 15 < 15 < 15 < 15 Cs-137 <15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 < 15 < 15 < 15 < 15 19-2

DUANE ARNOLD Table 19. Surface water samples, analyses for lodine-131 and gamma-emitting isotopes.

Collectior Monthly Units: pCi/L Location: D-51 Date Collected 01-12-04 02-13-04 03-16-04 04-16-04 05-14-04 06-09-04 Lab Code DSW-205 DSW-648 DSW-1 192 DSW-1755 DSW-2381 DSW-3167 Mn-54 < 15 < 15 < 15 < 15 < 15 <15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 < 15 < 15 < 15 < 15 < 15 Co-60 < 15* < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 < 15 < 15 < 15 < 15 <15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 < 15 < 15 < 15 < 15 <15 Cs-I 34 < 15 < 15 < 15 < 15 < 15 <15 Cs-1 37 < 15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 < 15 < 15 <15 < 15 Date Collected 07-14-04 08-25-04 09-22-04 10-27-04 11-10-04 12-08-04 Lab Code DSW-3989 DSW-4699 DSW-5364,5 DSW-6500 DSW-6812 DSW-7370 Mn-54 < 15 <15 < 15 < 15 < 15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 <15 < 15 < 15 < 15 < 15 Co-60 <15 <15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 <15 <15 < 15 < 15 < 15 < 15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 <15 < 15 < 15 < 15 <15 Cs-1 34 < 15 < 15 < 15 < 15 < 15 <15 Cs-1 37 < 15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 <15 < 15 < 15 < 15 < 15 < 15 19-3

DUANE ARNOLD Table 19. Surface water samples, analyses for iodine-131 and gamma-emitting isotopes.

Collectior Monthly Units: pCi/L Location: D-99 Date Collected 01-12-04 02-10-04 03-16-04 04-16-04 05-14-04 06-09-04 Lab Code DSW-206 DSW-649 DSW- 193 DSW-1756,7 DSW-2382 DSW-3168 Mn-54 < 15 <15 <15 <15 <15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 < 15 <15 < 15 <15 < 15 Co-60 < 15 < 15 <15 < 15 <15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 < 15 < 15 < 15 < 15 < 15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 <15 <15 <15 < 15 < 15 < 15 Cs-134 < 15 <15 <15 < 15 <15 < 15 Cs-1 37 < 15 <15 <15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 <15 <15 < 15 < 15 Date Collected 07-14-04 08-25-04 09-22-04 10-27-04 11-10-04 12-08-04 Lab Code DSW-3990 DSW-4700 DSW-5366 DSW-6501 DSW-6813 DSW-7371 Mn-54 < 15 < 15 <15 < 15 <15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 < 15 < 15 < 15 <15 < 15 Co-60 < 15 < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 < 15 < 15 < 15 < 15 < 15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 < 15 < 15 < 15 < 15 <15 Cs-1 34 < 15 < 15 < 15 < 15 <15 < 15 Cs-137 < 15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 < 15 <15 <15 < 15 19-4

DUANE ARNOLD Table 20. Surface water, analyses for potassium-40 by flame photometry and gamma-emitting isotopes.

Collection: Monthly Units: pCi/L Location: D-1 07 Date Collected 01-12-04 02-16-04 03-16-04 04-16-04 05-14-04 06-09-04 Lab Code DSW-207 DSW-650 DSW-1 194 DSW-1758 DSW-2383 DSW-3169 K-40 (fp) 24.2 25.1 8.7 10.4 19.0 15.2 Mn-54 < 15 < 15 < 15 < 15 < 15 < 15 Fe-59 <30 <30 <30 <30 < 30 <30 Co-58 < 15 <15 < 15 < 15 < 15 < 15 Co-60 < 15 < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 <15 < 15 < 15 < 15 < 15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 <15 < 15 < 15 < 15 < 15 Cs-1 34 < 15 <15 < 15 < 15 < 15 < 15 Cs-137 < 15 < 15 < 15 <15 <15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-1 40 < 15 < 15 < 15 <15 < 15 < 15 Date Collected 07-14-04 08-25-04 09-22-04 10-27-04 11-10-04 12-08-04 Lab Code DSW-3991 DSW-4701 DSW-5367 DSW-6502 DSW-6814 DSW-7372 K-40 (fp) 10.7 19.9 18.4 21.5 21.9 22.5 Mn-54 <15 <15 < 15 < 15 < 15 < 15 Fe-59 <30 <30 <30 <30 <30 <30 Co-58 < 15 < 15 < 15 < 15 < 15 < 15 Co-60 < 15 < 15 < 15 < 15 < 15 < 15 Zn-65 <30 <30 <30 <30 <30 <30 Nb-95 < 15 < 15 < 15 < 15 < 15 < 15 Zr-95 <30 <30 <30 <30 <30 <30 1-131 < 15 <15 < 15 < 15 < 15 < 15 Cs-1 34 < 15 < 15 < 15 < 15 < 15 < 15 Cs-1 37 < 15 < 15 < 15 < 15 < 15 < 15 Ba-140 <60 <60 <60 <60 <60 <60 La-140 < 15 < 15 < 15 < 15 < 15 < 15 I

20-1

DUANE ARNOLD Table 21. Surface water, analysis for tritium.

Collection: Quarterly composites of monthly samples.

Units: pCi/L Location D-49 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DSW-1225 DSW-3183 DSW-5620 DSW-7398 H-3 < 157 < 158 < 161 < 134 Location D-50 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DSW-1226, 7 DSW-3184 DSW-5621 DSW-7399 H-3 < 157 < 158 < 161 < 134 Location D-51 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DSW-1228 DSW-3185 DSW-5622 DSW-7400 H-3 < 157 < 158 < 161 < 134 Location D-99 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DSW-1229 DSW-3186 DSW-5623 DSW-7401 H-3 < 157 < 158 < 161 < 134 Location D-107 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DSW-1230 DSW-3187a DSW-5624 DSW-7402 H-3 < 157 255 i 90 640 i 112 292 i 84 a Tritium repeated with a result of 268+/-95 pCi/L.

21-1

DUANE ARNOLD Table 22. Fish, analyses of edible portion for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g wet Location Upstream, D49 Lab Code DF-3476 DF-3477 DF-6314 DF-6315 Date Collected 6122/2004 6122/2004 10/11/2004 10/11/2004 Bigmouth Sample Type Carp Buffalo Carp Carpsucker K-40 3.01 +/- 0.46 2.69 +/- 0.38 2.62 +/- 0.36 3.01 +/- 0.46 Mn-54 < 0.010 < 0.010 < 0.012 < 0.012 Fe-59 < 0.053 < 0.044 < 0.040 < 0.036 Co-58 < 0.012 < 0.020 < 0.018 < 0.016 Co-60 < 0.019 < 0.011 < 0.015 < 0.013 Zn-65 < 0.014 < 0.029 < 0.030 < 0.034 Nb-95 < 0.027 < 0.021 < 0.016 < 0.038 Zr-95 < 0.034 < 0.046 < 0.028 < 0.038 Ru-1 03 < 0.019 < 0.022 < 0.024 < 0.017 Ru-1 06 < 0.122 < 0.159 < 0.101 < 0.143 Cs-134 < 0.017 < 0.021 < 0.012 < 0.010 Cs-1 37 < 0.019 < 0.017 < 0.015 < 0.016 Ce-141 < 0.028 < 0.074 < 0.035 < 0.040 Ce-144 < 0.081 < 0.169 < 0.064 < 0.090 Location Downstream, D-61 Lab Code DF-3478 DF-3479 DF-6316 DF-6317 Date Collected 6/22/2004 6/22/2004 10/11/2004 10/11/2004 Gizzard Sample Type Carp Shad Carp Carpsucker K-40 2.58 +/- 0.50 3.09 +/- 0.61 2.09 +/- 0.43 3.04 +/- 0.56 Mn-54 < 0.015 < 0.016 < 0.024 < 0.026 Fe-59 < 0.045 < 0.088 < 0.075 < 0.060 Co-58 < 0.021 < 0.029 < 0.027 < 0.019 Co-60 < 0.021 < 0.022 < 0.017 < 0.009 Zn-65 < 0.024 < 0.048 < 0.035 < 0.034 Nb-95 < 0.041 < 0.043 < 0.024 < 0.044 Zr-95 < 0.049 < 0.081 < 0.055 < 0.025 Ru-1 03 < 0.039 < 0.034 < 0.033 < 0.029 Ru-1 06 < 0.185 < 0.116 < 0.140 < 0.189 Cs-1 34 < 0.022 < 0.027 < 0.025 < 0.022 Cs-137 < 0.020 < 0.018 < 0.023 < 0.020 Ce-141 < 0.040 < 0.036 < 0.070 < 0.032 Ce-144 < 0.147 < 0.065 < 0.154 < 0.108 22-1

DUANE ARNOLD Table 23. River sediment, analysis for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g dry I Location D-50 Lab Code DBS-4469 DBS-6823 Date Collected 8/9/2004 11/10/2004 K-40 9.11 +/- 0.52 7.37 +/- 0.58 Mn-54 < 0.011 < 0.017 Fe-59 < 0.055 < 0.049 Co-58 < 0.016 < 0.026 Co-60 < 0.009 < 0.022 Zn-65 < 0.033 < 0.051 Nb-95 < 0.019 < 0.045 Zr-95 < 0.010 < 0.041 Ru-1 03 < 0.022 < 0.026 Ru-1 06 < 0.120 < 0.079 Cs-134 < 0.014 < 0.026 Cs-137 < 0.014 < 0.015 Ce-141 < 0.041 < 0.062 Ce-144 < 0.078 < 0.073 Location D-51 Lab Code DBS-4470 DBS-6824 Date Collected 8/9/2004 11/10/2004 K-40 8.27 +/- 0.47 7.71 +/- 0.55 Mn-54 < 0.013 < 0.018 Fe-59 < 0.048 < 0.035 Co-58 < 0.014 < 0.027 Co-60 < 0.007 < 0.013 Zn-65 < 0.037 < 0.034 Nb-95 < 0.018 < 0.043 Zr-95 < 0.023 < 0.055 Ru-103 < 0.012 < 0.028 Ru-106 < 0.052 < 0.164 Cs-134 < 0.008 < 0.012 Cs-137 < 0.011 < 0.017 Ce-141 < 0.039 < 0.066 Ce-144 < 0.091 < 0.099 23-1

DUANE ARNOLD Table 23. River sediment, analysis for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g dry Location D-107 Lab Code DBS-4471 DBS-6825 Date Collected 8/9/2004 11/10/2004 K-40 6.36 +/- 0.57 5.73 +/- 0.53 Mn-54 < 0.020 < 0.016 Fe-59 < 0.055 < 0.036 Co-58 < 0.018 < 0.020 Co-60 < 0.012 < 0.013 Zn-65 < 0.042 < 0.041 Nb-95 < 0.032 < 0.030 Zr-95 < 0.018 < 0.023 Ru-103 < 0.020 < 0.017 Ru-106 < 0.118 < 0.049 Cs-134 < 0.021 < 0.019 Cs-137 < 0.016 < 0.011 Ce-141 < 0.056 < 0.055 Ce-144 < 0.082 < 0.124 23-2

DUANE ARNOLD Table 24. Precipitation, analyses for gamma emitting isotopes.

Collection: Monthly Units: pCi/L Location: DAEC Date Collected 01-12-04 02-13-04 03-16-04 04-16-04 05-14-04 06-09-04 Lab Code DP-208 DP-645 DP-1195 DP-1759 DP-2384 DP-3170,1 Mn-54 <6.4 <5.2 <3.5 <5.4 <4.0 < 1.7 Fe-59 <3.5 <9.4 <6.7 <8.9 <6.2 <2.4 Co-58 <5.0 <4.3 <4.0 <5.8 <3.7 < 1.5 Co-60 <6.5 <4.4 <6.3 <5.0 <3.7 <1.0 Zn-65 <5.3 <7.9 <3.6 < 11.2 <3.5 <3.9 Nb-95 <5.5 <7.1 <5.5 <8.3 <3.4 <2.3 Zr-95 <7.6 < 11.5 <9.0 <9.6 <6.5 <4.8 1-131 <7.0 <6.7 < 11.9 < 11.1 <8.5 < 11.6 Cs-1 34 <8.4 <6.8 <7.2 <5.8 <3.1 <1.5 Cs-137 <3.2 <4.3 <6.0 <6.9 <4.0 <1.8 Ba-140 < 28.0 <'13.8 < 38.9 < 25.4 < 18.7 < 19.9 La-1 40 <3.1 <3.3 <5.3 <7.9 <4.0 <2.5 Date Collected 07-14-04 08-25-04 09-22-04 10-27-04 11-10-04 12-09-04 Lab Code DP-3992 DP-4702 DP-5368 DP-6503 DP-6815 DP-7373 Mn-54 <4.0 <6.4 <3.9 < 1.9 <5.2 <3.9 Fe-59 <9.8 < 13.1 <2.9 <3.8 < 11.7 <7.8 Co-58 <4.8 <7.2 <4.4 < 1.3 <6.0 <3.8 Co-60 <6.1 <5.7 <2.9 <2.9 <6.2 <4.8 Zn-65 <9.4 < 12.4 <5.0 <3.7 < 11.1 <6.0 Nb-95 <4.2 <7.0 <4.5 <2.3 <3.2 <5.1 Zr-95 < 12.9 <16.4 <7.5 <3.9 < 8.9 <8.3 1-131 < 11.2 <4.9 < 11.0 <5.3 < 11.5 < 10.1 Cs-1 34 <4.7 <5.5 <3.9 <2.5 <5.0 <3.8 Cs-1 37 <4.1 <7.5 <3.1 <2.4 <5.7 <3.4 Ba-140 < 30.1 <31.0 <21.5 <12.0 < 31.1 < 30.1 La-140 < 10.3 <7.9 <3.4 <2.2 <8.2 <6.4 24-1

DUANE ARNOLD Table 25. Precipitation, analysis for tritium.

Collection: Quarterly composites of monthly samples.

Units: pCi/L Location Duane Amold Period 1St Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DP-1224 DP-3188 DP-5619 DP-7403 H-3 < 157 < 158 < 161 < 137 25-1

DUANE ARNOLD Table 26. Meat, analysis for gamma-emitting isotopes.

Collection: Annually, when available.

Units: pCi/g wet Lab Code NS" Date Collected Sample Type K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-i 06 Cs-1 34 Cs-137 Ce-141 Ce-144 D NS= No sample; Meat not collected in 2004. No animals slaughtered for home use.

26-1

DUANE ARNOLD Table 27. Soil, analysis for strontium-90 and gamma-emitting isotopes.

Collection: Annually Units: pCi/g dry Location D-15 D-1 6 Lab Code DSO-6820,1 DSO-6822 Date Collected 11/10/2004 11/10/2004 Sr-90 0.059 +/- 0.016 0.041 +/- 0.017 K-40 14.71 +/- 0.75 9.85 +/- 0.56 Mn-54 < 0.041 < 0.008 Fe-59 < 0.13 < 0.049 Co-58 < 0.041 < 0.007 Co-60 < 0.023 < 0.011 Zn-65 < 0.12 < 0.039 Nb-95 < 0.055 < 0.027 Zr-95 < 0.046 < 0.026 Ru-1 03 < 0.036 < 0.025 Ru-106 < 0.26 < 0.088 Cs-134 < 0.051 < 0.016 Cs-1 37 0.15 +/- 0.036 0.16 +/- 0.028 Ce-141 < 0.092 < 0.046 Ce-144 < 0.21 < 0.085 27-1