NG-09-0308, Duane Arnold - 2008 Annual Radiological Environmental Operating Report

Duane Arnold - 2008 Annual Radiological Environmental Operating Report

ML091310663
Person / Time
Site:	Duane Arnold
Issue date:	04/23/2009
From:	Environmental, NextEra Energy Duane Arnold
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2010-0209, NG-09-0308
Download: ML091310663 (112)

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11 Enclosure 2 to NG-09-0308 Duane Arnold Energy Center 2008 Annual Radiological Environmental Operating Report 111 Pages to follow NEXTera m ENERG-7 DUANE ARNOLD 2008 Annual Radiological Environmental Operating Report Duane Arnold Energy Center Cedar Rapids, Iowa Docket No. 50-331 January 1, 2008 through December 31, 2008 2008 DAEC Annual Radiological Environmental Operating Report 2008 Annual Radiological Environmental Operating Report Duane Arnold Energy Center Prepared By: Reviewed B Approved By: Date: 9 5-Date: Date: 2008 DAEC Annual Radiological Environmental Operating Report 2008 DAEC Annual Radiological Environmental Operating Report

-Environmental, Inc.Midwest Laboratory.an Allegheny Technologies Co.700 Landwehr Road

• Northbrook, IL 60062-2310 ph. (847) 554-0700

• fax (847) 564-4517 DUANE ARNOLD ENERGY CENTER CEDAR RAPIDS, IOWA DOCKET NO. 50-331 REPORT to the UNITED STATES NUCLEAR REGULATORY COMMISSION Annual Radiological Environmental Operating Report January 1 to December 31, 2008 Prepared by ENVIRONMENTAL, Inc.Midwest Laboratory Project No. 8001 Approved abor Manager 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.

ii TABLE OF CONTENTS PART I No. Page PREFACE ......................................................................................................................

ii List of Tables .................................................................................................................

v List of Figures ...................................................

vi 1.0 INTRO DUCTIO N ........................................................................................................

1 2.0 SUM MARY ...................................................................................................................

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

................................................................................

7 3.5 Program M odifications

.................................................................................

7 4.0 RESULTS AND DISCUSSIO N .................................................................................

8 4.1 Atmospheric Nuclear Detonations and Nuclear Accidents

..........................

8 4.2 Program Findings .......................................................................................

8 5.0 TABLES AND FIG URES .........................................................................................

12

6.0 REFERENCES

CITED ...........................................................................................

29 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)

Paqe D ata T abulations and A nalyses ......................................................................................

i PART II iv LIST OF TABLES No. PaQe 5.1 Characteristic Properties of Isotopes Quantified in Gamma-spectroscopic A na lyse s .................................................................................................

...13 5.2 Sample Collection and Analysis Program ..............................................................

14 5.3 Sam pling Locations, DA EC .....................................................................................

17 5.4 Type and Frequency of Collections

........................................................................

19 5.5 Sample Codes,Tables 5.4 and 5.6 ........................................................................

20 5.6 Missed Collections and Analyses ..........................................................................

21 5.7 Radiological Environmental Monitoring Program Summary ...................................

22 In addition, the following tables are in the Appendices:

Appendix A A-1 Environmental Resource Associates (EPA DW substitute program) ..................

Al-1 A-2 Interlaboratorv Comoarison Proaram Results. Thermoluminescent A-3 A-4 A-5 A-6 A-7 Appendix C C-1 D o sim eters (T LD s) .....................................................................................

A 2 -1 In-house Spiked Samples .........................................................................................

A3-1 In-house "Blank" Samples ........................................................................................

A4-1 In-house "Duplicate" Samples ............................................................................

A5-1 Department of Energy MAPEP comparison results .................................................

A6-1 Environmental Resource Associates (EML substitute program) ..............................

A7-1 Attachment A: Acceptance criteria for spiked samples ............................................

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

.................................

C-2 v LIST OF FIGURES No. Pape 5.1 Radiological Environmental Monitoring Program Sampling Stations near the Duane Arnold Energy Center ....................................................................

27 5.2 Radiological Environmental Monitoring Program Sampling Stations Outside 0 .5 M ile s ..................................................................................................

...2 8 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, 2008. 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.The Duane Arnold Energy Center (DAEC) is a boiling water reactor, located in Linn County, Iowa, on the Cedar River, and owned and operated by NextEra Energy Resources.

Initial criticality was attained on March 23, 1974. The reactor reached 100% power on August 12, 1974. Commercial operation began on February 1, 1975.1 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 2008 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 is indicated in the areas surrounding the site of the Duane Arnold Energy Center.2 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 provide a comparison between levels of naturally occurring radionuclides and radionuclides that could be attributed to the operation of the plant.3 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 eight locations.

Airborne iodine is collected by continuous pumping through charcoal filters. Seven of the eight locations are indicators and one is a control (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 are analyzed weekly for iodine-1 31.Ambient gamma radiation is monitored at a total of 46 locations.

A TLD is placed at each location and is exchanged and analyzed quarterly.

The TLD locations are distributed as follows:* Eight at active air sampling stations.* Four at de-activated air sampling stations greater than 3 miles from the DAEC stack.* Eighteen in a circle within a 0.5 mi. radius from the DAEC stack.* Six in 22.5' sectors within 1 mi. from the DAEC stack.* Ten in 22.50 sectors between 1 and 3 miles from the DAEC stack.Precipitation is collected monthly from one location and analyzed for gamma-emitting isotopes.Quarterly composites are analyzed for tritium.Milk samples are collected monthly from one indicator and one control location during the non-grazing season, October through April, and biweekly during the grazing season, May 1 through September

30. The samples are analyzed for iodine-1 31 and gamma-emitting isotopes.For additional monitoring of the terrestrial environment, grain, hay, strawberries and broad leaf vegetation samples are collected annually, as available, from nine locations:

one control (D-108)and eight indicators (D-16, D-57, D-58, D-72, D-94, D-96, D-109 and D-117). Grain, hay, strawberries and broad leaf (green leafy) vegetation samples are analyzed for gamma-emitting isotopes and at least two broad leaf vegetation samples are analyzed for iodine-1 31.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.4 Program Description (continued)

Potable ground water is collected quarterly from a treated municipal water system (D-53), the inlet to the municipal water treatment system (D-54), three indicator locations (D-55, D-57, D-58) and one control location (D-72). Non-potable water is collected from six on-site monitoring wells (MW-01 to MW-06).Two wells at each site, shallow (A) and intermediate (B) depths, have been made part of the permanent program. 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.

Soil samples are collected once per year at two indicator locations (D-15a and D-16). The samples are analyzed for strontium-90, tritium and gamma-emitting isotopes.Surface water is collected monthly from four river locations, D-49 (Lewis Access, Control, 4 mi.upstream), D-50 (Inlet), D-51 (Discharge) and D-61 (1/2 mi. downstream of discharge.

In addition, Pleasant Lake (D-99) surface water and sewage effluent from location (D-107) is also monitored.

The monthly samples are analyzed for tritium and gamma-emitting isotopes.

Additional analyses are performed on samples collected from the control and indicator locations, D-49 and D-61.Analyses for low-level iodine-131 are performed on monthly collections and quarterly composites are prepared and analyzed for strontium-89 and strontium-90.

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-107a).

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.

(1) Airborne Particulates I Airborne Iodine: No air particulate

/ air iodine samples were available from locations D-15 and D-16 for the weeks ending February 7 and February 14, 2008. The stations were not accessible due to heavy snow accumulation.

No air particulate

/ air iodine sample was collected from location D-5 for the week ending June 19, 2008, due to severe flooding.A partial sample (74 M 3) was collected from location D-5 for the week ending June 26, 2008, due to power loss.No air particulate

/ air iodine samples were collected from location D-16 for the weeks ending June 19, June 26 and July 3, 2008, due to severe flooding.No air particulate

/ air iodine sample was collected from location D-7 for the week ending July 23, 2008. There was no power to the sampler station.A partial sample (156 M 3) was collected from location D-3 for the week ending July 31, 2008.Partial samples were collected from location D-5 for the weeks ending August 7, 2008 (62 M 3)and August 14, 2008 (62 M 3), due to power loss.A partial sample (186 M 3) was collected from location D-6 for the week ending August 28, 2008, due to power loss.5 3.3 Progqram Execution (continued)

(2) Thermoluminescent Dosimeters:

Second Quarter, 2008: The TLD at location D-10 was lost due to vandalism.

TLDs for locations D-18, D-19, D-21 and D-82 were lost in the flooding.Third Quarter, 2008: TLDs for locations D-18, D-19 and D-36 were missing. Locations D-18 and D-19 could not be reinstalled due to flooding.

Location D-36 was lost in the field.(3) Vegqetation:

No vegetable samples were collected at locations D-94 and D-96. No crops were harvested.

Strawberries could not be collected at D-1 17 due to severe flooding in June.(4) Corrections to the 2007 Annual Report.a. Accompanying data for soil analyses was not included in the 2007 report. The data is presented below: Table 21. Soil, analysis for strontium-90 and gamma-emitting isotopes.Collection:

Annually Units: pCi/g dry Location Lab Code Date Collected Sr-90 K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 D-15 DSO- 7912 11-15-07 0.032 +/- 0.017 16.53 +/- 0.82< 0.026< 0.058< 0.029< 0.018< 0.052< 0.025< 0.027< 0.027< 0.181< 0.019 0.15 +/- 0.023< 0.065< 0.100< 0.030 D-16 DSO- 7913 11-15-07 9.70 +0.46 0.013 0.024 0.011 0.005 0.025 0.011 0.030 0.006 0.049< 0.009 0.095 +/- 0.017< 0.028< 0.050 b. Strawberries were collected in 2007 at D-1 17 and analyzed for gamma-emitting isotopes.

No gamma-emitting isotopes, with the exception of naturally-occurring potassium-40 could be detected above their respective LLDs.c. The collection date for vegetation samples, locations D-108 and D-109, should read 09/18/07 instead of 10/02/07 as reported.6 3.3 Progqram Execution (continued)

(4) Corrections to the 2007 Annual Report.d. Distance of the Shellsburg sample point, (D-7, Table 5.3) from the site stack should read 5 mi W. instead of 6 mi W.3.4 Laboratory Procedures The iodine-131 analyses in milk and water were made using a sensitive radiochemical procedure involving separation of the iodine using an ion-exchange method, solvent extraction and subsequent beta counting.

Levels of iodine-1 31 in vegetation and concentrations of airborne iodine-131 in charcoal samples were determined by gamma spectroscopy.

Gamma-spectroscopic analyses were performed using high-purity germanium (HPGe)detectors.

The gamma isotopic analysis provides a spectrum with an energy range of 80 to 2048 KeV. Specific isotopes included are Mn-54, Fe-59, Co-58, Co-60, Zn-65, Zr-95, Nb-95, Ru-103, Ru-106, 1-131, Ba-La-140, Cs-134, Cs-137, Ce-141, and Ce-144. Naturally occurring gamma-emitters, such as K-40 and Ra daughters, are frequently detected but may not be listed.Tritium was measured 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 Progqram Modifications Additional analytical requirements were added to the program in 2008: Quarterly composites of monthly surface water samples from locations D-49 and D-61 were prepared and analyzed for strontium-89 and strontium-90.

Soil samples from locations D-15a and D-16 were distilled and analyzed for tritium.A new dairy supplier (D-110) was added to the program in 2008. The farm is located approximately 7.8 miles southwest of the Plant.7 4.0 RESULTS AND DISCUSSION All collections and analyses were made as scheduled, except for those listed 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.Tabulated results of measurements are not included in this section, although reference to these results will be made in discussion.

A complete tabulation of results for 2008 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 2008.4.2 Program Findincqs Results obtained show background levels of radioactivity in the environmental samples collected outside of the Site Protected Area in 2008.Low concentrations of tritium were identified in some groundwater samples collected within the site Protected Area. In no instances were the REMP threshold reporting levels exceeded. (ODAM, Table 6.3-3)Airborne Particulates The average annual gross beta concentrations in airborne particulates were identical at the 3 indicator and control locations (0.029 pCi/m ) and similar to levels observed from 1992 through 2007. The results are tabulated below.Ye Indicators Controls 3 Concentration ( pCi/mi F3I 0.022 I 0.023 Year Indicators Controls 3 Concentration ( pCi/m)199 2001 0.026 0.026 1994 1995 1996 1997 1998 1999 2000 0.023 0 0.024 2002 0.027 0.027 0.025 0.024 2003 0.029 0.029 0.024 0.023 2004 0.028 0.028 0.023 0.023 2005 0.031 0.031 0.024 0.024 2006 0.029 0.027 I 0.026 1 0.027 0.026 i 0.027 0 2007 0.031 0.031 I I 2008 0.029 0.029 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 3(Arnold and AI-Salih, 1955) was detected in all samples, with an average activity of 0.081 pCi/m for all locations.

All other gamma-emitting isotopes were below their respective LLD limits.8 Proaram Findinas (continued)

Airborne Iodine 3 Weekly levels of airborne iodine-1 31 were below the lower limit of detection (LLD) of 0.03 pCi/m in all samples.Ambient Radiation (TLDs)At twelve* air sampling locations, the TLD readings averaged 18.0 and 17.8 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 19.2 mR/quarter, 19.6 mR/quarter and 17.3 mR/quarter, respectively.

The average for all locations was 18.5 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.

• There are currently eight active and four inactive air sampler stations.Precipitation Precipitation from the on-site location D-16 was analyzed for tritium and gamma-emitting isotopes.

No tritium activity was measured above the LLD of 172 pCi/L. No gamma-emitting isotopes were detected.Milk Iodine-1 31 results were below the detection limit of 0.5 pCi/L 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 selectivemetabolism 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 2008 show no radiological effects of plant operation.

9 Ground Water (potable)The annual mean for gross beta activity 3.3 pCi/L, similar to levels observed from 1991 through 2007. The location with the highest mean (3.7pCi/L) was D-58, a farm 1.0 mile distant from the plant.Tritium activity measured below the LLD of 173 pCi/L in all samples. No effect from plant operation is indicated.

Ground Water (Site Monitoring Wells)Twelve on-site monitoring wells (six shallow and six intermediate depth) were sampled in 2008 ahd analyzed for gross beta and tritium.The annual mean for gross beta activity in six intermediate depth wells measured 2.6 pCi/liter.

Measurements for the shallow wells averaged 3.9 pCi/liter.

The highest mean (6.0 pCi/L) was observed at shallow well MW-6A. The same pattern of concentration was observed in 2007. The most likely cause of higher beta activity is contribution from naturally-occurring isotopes.

No plant effect was indicated.

Tritium activity measured below the LLD of 173 pCi/L in all twenty four samples collected from the intermediate depth wells. Slight activity was identified in three of twenty-four samples taken from the shallow wells. An almost identical pattern of concentrations was observed in 2007, and was attributed to "washout" from gaseous effluents.

Vegetation Iodine-131 concentrations in broadleaf vegetation were below the LLD level of 0.050 pCi/g wet weight in all samples.With the exception of 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 activity measured 0.059 pCi/g dry weight in one of the two on-site locations.

Cesium-137 activity averaged 0.15 pCi/g dry weight for the two on-site locations.

Strontium-90 and cesium-137 activities are similar or less than levels observed from 1991 through 2007, these levels are generally attributable to deposition of fallout from previous decades.Naturally-occurring potassium-40 averaged 11.91 pCi/g dry weight. No effect from the plant operation is indicated.

The soil samples were distilled and analyzed for tritium. No tritium was detected above an LLD value of 162 pCi/L.10 Proqram Findings (cOntinued)

Surface Water Surface water was tested for tritium and gamma emitting isotopes in seventy-two samples from six locations.

No measurable tritium activity was detected above an LLD of 179 pCi/L. Gamma-emitting isotopes were below detection limits.Analyses for strontium-89 and strontium-90 were performed on comnposite samples from locations D-49 (control) and D-61 (0.5 mi. downstream, indicator).

All samples tested below detection limits.No plant effect on surfacewater is indicated.

Fish Fish were collected in June and September, 2008, and analyzed for gamma-emitting isotopes.With the exception of naturally-occurring potassium-40 no gamma-emitting isotopes were identified in edible portions of fish. The potassium-40 level was similar at both the indicator and control locations (2.68 and 2.98 pCi/g wet, respectively).

No plant effect on the fish population is indicated.

River Sediments River sediments were collected in May:and October, 2008, and analyzed for gamma-emitting isotopes.

Potassium-40 activity ranged from 7.03 -8.16 pCi/g dry weight and averaged 7.59 pCi/g dry weight, No Cs-1 37 activity was detected in sediments in 2008, at either the control or discharge locations.

Trace levels of cesium-1 37 had been consistently observed in past years.All other gamma-emitting isotopes were below detection limits. There is no indication of aplant effect.11 5.0 TABLES AND FIGURES 12 Table 5.1 Characteristic properties of isotopes quantified in gamma-spectroscopic analyses.Designation Comment Isotope Half-lifea

1. 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 10 9 y II. Fission Products b Nuclear accidents and 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-106 368.2 d Cs-134 2.061 y Cs-137 30.174 y Ce-141 32.5 d Ce-1 44 284.31 d Ill. 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 b Half-lives are taken from Appendix E of Environmental Quarterly, 1 January 1978, EML-334 (U. S. Department of Energy, 1978).Includes fission.-product daughters.

13 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 Analysisa Airborne 3 Hiawatha Continuous operation of Analyze for gross beta activity Particulates 5 Palo 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 6 Center Point collection at least once per change. Perform gamma isotopic 7 Shellsburg week or as required by dust analysis on each sample having 11 Toddville loading gross beta activity greater than ten 13 Alburnett (C) times the yearly mean of the 15 On-site North control samples.16 On-site South Composite weekly samples to form a quarterly composite (by location).

Analyze quarterly composite for gamma isotopic.Airborne Iodine 3 Hiawatha Continuous operation of Analyze each cartridge for iodine-5 Palo sampler with sample 131.6 Center Point collection at least once per 7 Shellsburg week.11 Toddville 13 Alburnett (C)15 On-site North 16 On-site South Ambient 1-3, 5-8, Air Part. Locations, One dosimeter continuously Read gamma radiation dose Radiation 10, 11, 13 Controls at each location, quarterly.

15, 16 Air Part. Locations, Dosimeters are changed at Indicators least quarterly.

17-23, -< 0.5 mi. of Stack 28-32, 82-86, 91 43-48 < 1.0 mi. of Stack 33-42 < 3.0 mi. of Stack Surface Water 49 Lewis Acess (C) Once per month. Tritium and gamma isotopic 50 Plant Intake analyses for each sample (by 51 Plant Discharge location).

61 0.5 mi. downstream 99 Pleasant Creek Lake Locations 49 and 61, analyses For low level 1-131. Quarterly 107 Plant Sewage Composites for Sr-89, Sr-90.Dischange (C) Denotes control location.

All other locations are indicators.

14 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 Analysisa Ground Water 53 Treated Municipal Grab sample at least Gross beta and tritium activity (potable) 54 Inlet to Municipal Water once per quarter. analysis on quarterly sample. If Treatment System gross beta is greater than ten times the yearly mean of control 55 On-site well samples, perform gamma isotopic and Sr-89 and Sr-90 analyses.57, 58 Wells off-site and 72 (C) within 4 km of DAEC On-site Ground On-site wells: Water 111 MW-01A, B (SSE)(Monitoring 112 MW-02A, B (ESE)Wells) 113 MW-03A, B (NW)114 MW-04A, B (S)115 MW-05A, B (SSW)116 MW-06A, B (NE)River 50 Plant Intake (C) One sample per 6 Gamma isotopic analysis of each Sediment 51 Plant Discharge months (once during sample.107a North Drainage Ditch January through June (on-site) and once during July through December).

Vegetation 16, 57, 58, Farms that raise food Annually at harvest Gamma isotopic analysis of edible 72, 94, crops. time. One sample of portions.96, 109, each: grain, green leafy, and forage. At 1-131 analysis on broadleaf 117 (Strawberries) least one sample vegetation.

should be broadleaf 108 (C) vegetation.

Fish 49 Cedar River upstream One sample per 6 Gamma isotopic analysis on of DAEC not influenced months (once during edible portions.by effluent (C) January through June and once during July Downstream of DAEC through December).

61 in influence of effluent b Milk 108 (C) Control Farm near At least once per two Gamma isotopic and iodine-131 Watkins, Iowa weeks during the analyses of each sample.grazing season.110 Dairy Farm 7.8 mi. SW. At least once per month during the non-grazing season.(C) denotes control location.

All other locations are indicators.

15 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 Analysisa Precipitation 16 On-site Monthly Gamma isotopic on all samples.Tritium on quarterly composites.

Meat On-site Annually Gamma Isotopic Soil 15a, 16 On-site Annually Gamma Isotopic, Sr-90 and tritium 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 minimum detectable activity (MDA) should be reported quantitatively.

The grazing season is considered to be May 1 through September 30.Ohly sampled when meat is butchered for home use.16 Table 5.3 Sampling locations, Duane Arnold Energy Center.Sampling Location Code Location Description Distance and Direction from Site Stack D-1 D-2 D-3 D-5 D-6 D-7 D-8 D-10 D-1 1 D-1 3 D-1 5 D-15a D-1 6 D-17 D-18 D-19 D-20 D-21 D-22 D-23 D-28 D-29 D-30 D-31 D-32 D-33 D-34 D-35 D-36 D-37 D-38 D-39 D-40 D-41 D-42 D-43 D-44 D-45 Cedar Rapids Marion Hiawatha Palo Center Point Shellsburg Urbana Atkins Toddville Alburnett On-site, North-Northwest On-site, North-Northwest On-site, South-Southeast On-site, N On-site, NNE On-site, NE On-site, ENE On-site, ENE On-site, E On-site, ESE On-site, WSW On-site, W On-site, WNW On-site, NW On-site, NNW 3 miles N 3 miles NNE 3 miles NE 3 miles ENE 3 miles E 3 miles ESE 3 miles SE 3 miles SSE 3 miles S 3 miles SSE 1 mile SSW 1 mile WSW 1 mile W 11 mi SE 11 mi ESE 7 mi SE 3 mi SSW 7 mi N 5 mi W 10 mi NNW 9 mi SSW 4 mi E 9 mi ENE 0.5 mi NNW 0.4 mi NNW 0.5 mi SSE 0.5 mi N 0.5 mi NNE 0.5 mi NE 0.5 mi ENE 0.5 mi ENE 0.5 mi E 0.5 mi ESE 0.5 mi WSW 0.5 mi W 0.5 mi WNW 0.5 mi NW 0.5 mi NNW 3.0 mi N 3.0 mi NNE 3.0 mi NE 3.0 mi ENE 3.0 mi E 3.0 mi ESE 3.0 mi SE 3.0 mi SSE 3.0 mi S 3.0 mi SSE 1.0 mi SSW 1.0 mi WSW 1.0 mi W 17 Table 5.3 Sampling locations, Duane Arnold Energy Center (continued).

Sampling Location Code Location Description D-46 D-47 D-48 D-49 D-50 D-51 D-53 D-54 D-55 D-57 D-58 D-61 D-72 D-82 D-83 D-84 D-85 D-86 D-91 D-94 D-96 D-99 D-107 D-107a D-108 D-109 D-110 D-111 D-112 D-113 D-114 D-115 D-116 D-117 1 mile WNW 1 mile NW 1 mile NNW Lewis Access, upstream of DAEC Plant Intake Plant Discharge Treated Municipal Water Inlet, Municipal Water Treatment System On-site Well Farm (Off-site Well)Farm (Off-site Well)0.5 mi downstream of plant discharge Farm On-site, SE On-site, SSE On-site, S On-site, SSW On-site, SW On-site, NNW Farm Farm Pleasant Creek Lake Sewage Plant Effluent North Drainage Ditch Farm Farm Farm Monitoring wells, MW-01A, B Monitoring wells, MW-02A, B Monitoring wells, MW-03A, B Monitoring wells, MW-04A, B Monitoring wells, MW-05A, B Monitoring wells, MW-06A, B Palo Strawberry Farm Distance and Direction from Site Stack 1.0 mi WNW 1.0 mi NW 1.0 mi NNW 4.0 mi NNW 1.0 mi WSW 1.0 mi WSW-SW 2.0 mi SSW 0.5 mi SE 0.5 mi SSE 0.5 mi S 0.5 mi SSW 0.5 mi SW 0.5 mi NNW 2.7 mi N 8.0 mi SSW 2.5 mi WNW On-site On-site 17.3 mi. SW 3.6 mi. SW 7.8 mi. SW On-site, SSE On-site, ESE On-site, NW On-site, S On-site, SSW On-site, NE 2.3 mi. SSW 18 Table 5.4 Type and Frequency of collection.

Location Weekly Monthly Quarterly Semiannually Annually D-1 TLD D-2 TLD D-3 AP, Al TLD D-5 AP, Al TLD D-6 AP, Al TLD D-7 AP, Al TLD D-8 TLD D-10 TLD D-11 AP, Al TLD D-13 AP, Al TLD D-15 AP, Al TLD D-1 5A SO D-16 AP, Al P TLD SO, G D-17 to D-23 TLD D-28 to D-42 TLD D-43 to D-48 TLD D-49 SW F D-50 SW BS D-51 SW BS D-53 WW D-54 WW D-55 WW D-57 WW G D-58 WW G D-61 SW F D-72 WW G D-82 to D-86 TLD D-91 TLD D-94 G D-96 G D-99 SW D-107 SW D-107A BS D-108 MI* G D-109 G D-110 MI*On-site ME D-111 to D-116 WW D-117 G* Biweekly during the grazing season.19 Table 5.5. Sample codes used in Table 5.4 and Table 5.6.Code Description AP Airborne Particulates Al Airborne Iodine TLD Thermoluminescent Dosimeter P Precipitation MI Milk WW Well Water G Vegetation ME Meat sO Soil Sw Surface Water F Fish BS River Sediment 20 Table 5.6. Missed collections and analyses, Duane Arnold Energy Center.Sample Collection Date Type Analysis Location(s) or Period Comments AP / Al Gross Beta, 1-131 AP/AI Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP/AI Gross Beta, 1-131 AP/AI Gross Beta, 1-131 AP/AI Gross Beta, 1-131 AP/AI Gross Beta, 1-131 AP/AI Gross Beta, 1-131 TLD Ambient Gamma TLD Ambient Gamma TLD Ambient Gamma TLD Ambient Gamma G Gamma G Gamma D-15 D-16 D-15 D-16 D-5 D-5 D-16 D-16 D-16 D-7 D-3 D-5 D-5 D-6 D-10 D-18, D-21 D-19, D-82 D-18, D-19 D-36 D-1 17 D-94, D-96 02-07-08 Not accessible due to heavy snows 02-14-08 Not accessible due to heavy snows 06-19-08 06-26-08 06-19-08 06-26-08 07-03-08 07-23-08 07-31-08 08-07-08 08-14-08 08-28-08 2nd Qtr, 2008 2nd Qtr, 2008 3rd Qtr, 2008 3rd Qtr, 2008 July, 2008 October, 2008 Not collected due to severe flooding.Partial sample (74 mi 3) due to power loss.Not collected due to severe flooding.No power to the sampler station.Partial sample (156 M 3).Partial sample (62 M 3) due to power loss.Partial sample (62 M 3) due to power loss.Partial sample (186 M 3) due to power loss.TLD lost due to vandalism.

TLDs lost in the floods.TLDs not installed due to flooding.TLD lost in the field.No strawberries available.

No crops available.

In no instance did missed analyses affect minimum sampling requirements as specified in the ODAM.21 Table 5.7 Radiological Environmental Program Summary.Name of Facility Location of Facility Duane Arnold Energy Center Docket No. 50-331 Reporting Period January-December, 2008 Linn, Iowa (County, State)Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDb Mean (F)c Mean (F)c Mean (F)' Routine (Units) Analyseso Range' Locationd Range' Rangec Resultso Airborne GB 407 0.004 0.029 (355!355)

D-16, On-site 0.031 (47/47) 0.029 (52/52) 0 Particulates (0.010-0.064) 0.5 mi. SSE (0.011-0.060)

(0.013-0.057)(pCI/ms) GS 32 Be-7 0.020 0.081 (28/28) D-15,On-site 0.088(4/4) 0.078(4/4) 0 (0.049-0.120) 0.5 mi. NW (0.076-0.120)

(0.060-0.094)

Nb-95 0.0019 < LLD < LLD 0 Zr-95 0.0023 < LLD < LLD 0 Ru-103 0.0016 < LLD < LLD 0 Ru-106 0.0087 < LLD < LLD 0 Cs-134 0.0010 < LLD < LLD 0 Cs-137 0.0014 < LLD < LLD 0 Ce-141 0.0025 < LLD < LLD 0 Ce-144 0.0058 < LLD < LLD 0 Airborne iodine 1-131 407 0.030 < LLD < LLD 0 (pCllm')TLD, AP Locations Gamma 47 1.0 18.0(8/8)

D-8, Urbana 21.0(4/4) 17.8 (39/39) 0 (mR/quarter)

(15.1-19.7) 10 mi. NW (17.3-24.2)

(13.7-24.2)

TLD, within 0.5 mi. of Stack Gamma 66 1.0 19.2 (66/66) D-29,On-site 23.2(4/4)

None 0 (mR/quarter)

(13.7-27.3) 0.5 mi, W (18.1-26.0)

TLD, within 1.0 ml. of Stack Gamma 24 1.0 19.6 (24/24) 0-48, 21.6(4/4)

None 0 (mR/quarter)

(14.2-24.2) 1 mi. NW (17.7-24.2)

TLD, within 3.0 mi. of Stack Gamma 39 1.0 17.3 (39/39) D-37, 21.5 (4/4) None 0 (mR/quarter)

(14.1-25.2) 3 mi. E (19.0-25.2)

Precipitation (pCI/L) H-3 4 172 < LLD < LLD 0 GS 12 Mn-54 5,6 < LLD < LLD 0 Fe-59 11.0 < LLD < LLD 0 Co-58 4.9 < LLD < LLD 0 Co-60 6.5 < LLD < LLD 0 Zn-65 9.3 < LLD < LLD 0 Nb-95 6.9 < LLD < LLD 0 Zr-95 10.3 < LLD <- LLD 0 1-131 15.5 < LLD < LLD 0 Cs-134 5.1 < LLD < LLD 0 Cs-137 6.5 < LLD < LLD 0 Ba-140 41.5 < LLD < LLD 0 La-140 7.3 < LLD < LLD 0 22 Table 5.7 Radiological Environmental Program Summary.Name of Facility Location of Facility Duane Arnold Energy Center Docket No. 50-331 Reporting Period January-December, 2008 Linn, Iowa (County, State)Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDO Mean (F)c Mean (F) Mean (F)' Routine (Units) Analyseso

.Range' Location' Range' Range' Results'Milk (pCi/L) 1-131 36 0.5 < LLD < LLD 0 GS 36 K-40 100 1392 (18/18) D-108, Farm 1401 (18/18) 1401 (18/18) 0 (1309-1510) 17.3 mi. SW (980-1587)

(980-1587)

Cs-134 5 < LLD -< LLD 0 Cs-137 5 < LLD < LLD 0 Ba-140 60 < LLD < LLD 0 La-140 5 < LLD < LLD 0 Ground Water, GB 24 1.8 3.3 (9/20) D-58, Farm 3.7 (4/4) < LLD 0 potable (pCi/L) (2.1-4.8) 1 mi. WSW-SW (2.7-4.8)H-3 24 173 <LLD < LLD 0 Monitoring GB 48 1.9 3.7 (20/48) MW-6A, shallow, 6.0 (4/4) None 0 wells (pCi/L) (2.0-8.7)

Onslte, NE (3.2-8.7)H-3 48 173 291 (3/48) MW-6A, shallow 340 (2/4) None 0 (194-433)

Onsite, NE (246-433)Broadleaf 1-131 4 0.050 < LLD < LLD 0 Vegetation (pCi/g wet) GS 4 K-40 0.5 3.62 (3/3) D-108, Farm 4.96 (1/1) 4.96(1/1) 0 (2.78-4.26) 17.3 mi. SW Mn-54 0.025 < LLD -< LLD 0 Co-58 0.036 < LLD < LLD 0 Co-60 0.019 < LLD < LLD 0 Nb-95 0.031 < LLD < LLD 0 Zr-95 0.029 < LLD < LLD 0 Ru-103 0.027 < LLD < LLD 0 Ru-106 0.26 < LLD < LLD 0 Cs-134 0.050 < LLD < LLD 0 Cs-137 0.024 < LLD < LLD 0 Ce-141 0.043 < LLD < LLD 0 Ce-144 0,10 < LLD -< LLD 0 23 Table 5.7 Radiological Environmental Program Summary.Name of Facility Location of Facility Duane Arnold Energy Center Docket No.Reporting Period 50-331 January-December, 2008 Unn, lowe (County, State)Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD 0 Mean (F)f Mean (F) Mean (F)c Routine (Units) Analyses' Range' Location' Rangec Rangec Results'Vegetation GS 8 (Grain) K-40 0.5 7.76 (6/6) D-108, Farm 15.21 (2/2) 15.21 (2/2) 0 (pCi/g wet) (1.99-17.48) 17.3 mi. SW (2.67-27.75)

(2.67-27.75)

Mn-54 0.025 < LLD < LLD 0 Co-58 0.022 < LLD .LLD 0 Co-60 0.025 < LLD < LLD 0 Nb-95 0.036 < LLD < LLD 0 Zr-95 0,042 < LLD < LLD 0 Ru-103 0.030 < LLD < LLD 0 Ru-106 0.22 < LLD < LLD 0 Cs-134 0.026 < LLD < LLD 0 Cs-137 0.025 < LLD < LLD 0 Ce-141 0.051 < LLD < LLD 0 Ce-144 0.18 < LLD < LLD 0 Soil Sr-90 2 0.016 0.059 (1/2) D-15, On-site 0.059(1/1)

None 0 (pCi/gwet) 0.5 mi. NW GS 2 K-40 0.5 11.91 (2/2) D-15, On-site 14.80 (111) None 0 (9.02-14.80) 0.5 mi. NW Mn-54 11.91 < LLD -None 0 Fe-59 0.028 < LLD None 0 Co-58 0.044 < LLD None 0 Co-60 0.019 < LLD None 0 Zn-65 0.015 < LLD None 0 Nb-95 0.052 < LLD None 0 Zr-95 0.022 < LLD None 0 Ru-103 0.045 < LLD None 0 Ru-106 0.030 < LLD None 0 Cs-134 0.22 < LLD None 0 Cs-137 0.060 0.15 (2/2) D-16, On-site 0.16 (1/1) None 0 (0.14-0.16) 0.5 mi. SSE Ce-141 0.15 < LLD None 0 Ce-144 0.061 < LLD None 0 24 Table 5,7 Radiological Environmental Program Summary.Name of Facility Location of Facility Duane Arnold Energy Center Linn, Iowa (County, State)Docket No.Reporting Period 50-331 January-December, 2008 Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD*n Mean (F)c Mn F Mean (F)' Routine (Units) Analyses' Range' Location' Range' Range' Results'Surface Water H-3 72 179 < LLD < LLD 0 (pCi/L)1-131 24 0.6 < LLD < LLD 0 GS -72 Mn-54 6.0 < LLD < LLD 0 Fe-59 9, < LLD < LLD 0 Co-58 6.6 < LLD < LLD 0 Co-60 6.4 < LLD < LLD 0 Zn-65 12.2 < LLD < LLD 0 Nb-95 5.8 < LLD < LLD 0 Zr-95 11.6 < LLD < LLD 0 1-131 12.5 < LLD < LLD 0 Cs-134 5.7 < LLD < LLD 0 Cs-137 5.6 < LLD < LLD 0 Ba-140 28.3 < LLD < LLD 0 La-140 6.1 < LLD < LLD 0 Sediments GS 6 (pCi/g dry) K-40 1.0 7,68 (4/4) D-51. 8.06 (2/2) 7.42(2/2) 0 (7.03-8.16)

Plant Discharge (7.97-8.16)

(7.40-7.44)

Mn-54 0.017 < LLD < LLD 0 Fe-59 0.078 < LLD < LLD 0 Co-58 0.022 < LLD < LLD 0 Co-60 0.015 < LLD < LLD 0 Zn-65 0.059 < LLD < LLD 0 Nb-95 0.035 < LLD < LLD 0 Zr-95 0.032 < LLD < LLD 0 Ru-103 0.029 < LLD < LLD 0 Ru-106 0.15 < LLD < LLD 0 Cs-134 0.020 < LLD < LLD 0 Cs-137 0.018 < LLD < LLD 0 Ce-141 0.057 < LLD < LLD 0 Ce-144 0.10 < LLD < LLD 0 25 Table 5.7 Radiological Environmental Program Summary.Name of Facility Location of Facility Duane Arnold Energy Center Docket No. 50-331 Reporting Period January-December, 2008 Unn, Iowa (County, State)Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD' Mean (F)Mean (Fl Mean (F)' Routine (Units) Analyseso Range' Location' Range' Range' Results'Fish GS 8 (pCi/g wet) K-40 1.0 2.68(4/4)

D-49. 2.98 (4/4) 2.98 (4/4) 0 (1.18-3.61)

Upstream (2.57-3.34)

(2.57-3.34)

Mn-54 0.014 < LLD < LLD 0 Fe-59 0.040 < LLD < LLD 0 Co-58 0.012 < LLD < LLD 0 Co-60 0.014 < LLD < LLD 0 Zn-65 0.024 < LD < LLD 0 Nb-95 0.023 < LLD < LLD 0 Zr-95 0.027 < LLD < LLD 0 Ru-103 0.025 < LLD < LLD 0 Ru-106 0.14 < LLD < LLD 0 Cs-134 0.011 < LLD < LLD 0 Cs-137 0.010 < LLD < LLD 0 Ce-141 0.042 < LLD < LLD 0 Ce-144 0.097 < LLD < LLD 0 GB = Gross beta; GS = Gamma spectroscopy

'LLD = Nominal lower limit of detectionbased on 4.66 sigma counting error for the background sample.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.0 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.26 Figure 5.1 Radiological Environmental Monitoring Program Sampling Stations near the Duane Arnold Energy Center.See Table 5.3 for sampling locations and Table 5.4 for Type and Frequency of collection.

27 Figure 5.2 Radiological Environmental Monitoring Program Sampling Stations Outside 0.5 Miles.See Table 5.3 for sampling locations and Table 5.4 for Type and Frequency of collection.

28

6.0 REFERENCES

CITED Arnold, J. R. and H. A. AI-Salih.

1955. Beryllium-7 Produced by Cosmic Rays. Science 121: 451-453.Eisenbud, M. 1963. Environmental Radioactivity, McGraw-Hill, New York, New York, pp. 213, 275-276.Environmental, Inc., Midwest Laboratory.

2001 -2009 Environmental Radiological Monitoring Program for the Duane Arnold Energy Center, Annual Report -Part II, Data Tabulations and Analyses, January-December, 2001 -2008 2003. Quality Assurance Program Manual, Rev. 1, 21 October 2003.2005. Quality Control Procedures Manual, Rev. 1, 17 September 2005.2003. 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.U. S. Department of Energy. 1978. Environmental Quarterly, Appendix E. Half-Life Tables, 1 January 1978, EML-334.U. S. Nuclear Regulatory Commission.

1977. Regulatory Guide 1.109, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR Part 50, Appendix I.Wilson, D. W., G. M. Ward and J. E. Johnson. 1969. In Environmental Contamination by Radioactive Materials, International Atomic Energy Agency. p.125.29

-Environmental, Inc./ Midwest Laboratory I" an Allegheny Technologies Co.700 Landwehr Road

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

• fax (847) 564-4517 APPENDIX A INTERLABORATORY COMPARISON PROGRAM RESULTS NOTE: Environmental Inc., Midwest Laboratory participates in intercomparison studies administered by Environmental Resources Associates, and serves as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada. Results are reported in Appendix A. TLD Intercomparison results, in-house spikes, blanks, duplicates and mixed analyte performance evaluation program results are also reported.

Appendix A is updated four times a year; the complete Appendix is included in March, June, September and December monthly progress reports only.January, 2008 through December, 2008 Appendix A Interlaboratory Comparison Program Results Environmental, Inc., 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.Table A-5 lists REMP specific analytical results from 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.Complete analytical data for duplicate analyses is available upon request.The results in Table A-6 were obtained through participation in the Mixed Analyte Performance Evaluation Program.Results in Table A-7 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 Environmental Measurement Laboratory Quality Assessment Program (EML).Attachment A lists the laboratory precision at the 1 sigma level for various analyses.

The acceptance criteria in Table A-3 is set at +/- 2 sigma.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 ANALYSESa 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-90b 2 to 30 pCi/liter or kg 5.0 pCi/liter> 30 pCi/liter or kg 10% of known value Potassium-40

> 0.1 g/liter or kg 5% of known value Gross alpha < 20 pCi/liter 5.0 pCi/liter> 20 pCi/liter 25% of known value Gross beta < 100 pCi/liter 5.0 pCi/liter> 100 pCi/liter 5% of known value Tritium -< 4,000 pCi/liter

+ la =169.85 x (known)0 0 9 3 3> 4,000 pCi/liter 10% of known value Radium-226,-228

> 0.1 pCi/liter 15% of known value Plutonium a 0.1 pCi/liter, gram, or sample 10% of known value Iodine-1 31, < 55 pCi/liter 6 pCi/liter Iodine-129b

> 55 pCi/liter 10% of known value Uranium-238, < 35 pCi/liter 6 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 Other Analyses b --- 20% of known value a From EPA publication, "Environmental Radioactivity Laboratory Intercomparison Studies Program, Fiscal Year, 1981-1982, EPA-600/4-81-004.

b Laboratory limit.A2 TABLE A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.Concentration (pCi/L)Lab Code Date Analysis Laboratory ERA Control Resultb Resultc Limits Acceptance STW-1 148 STW-1 148 STW-1 149 STW- 1149 STW-1 149 STW-1 149 STW-1 149 STW-1150 STW-1 150 STW-1 151 STW-1152 STW-1152 STW-1 152 STW-1 153 STW-1 154 STW-1 154 STW-1 155 STW-1 155 STW-1 155 STW-1 155 STW-1 155 STW-1156 STW-1 156 STW-1 157 STW-1157 STW-1 157 STW-1 164 STW-1 164 STW-1 165 STW-1 165 STW-1 165 STWý1 165 STW-1 165 STW-1 166 STW-1 166 STW-1 167 STW-1 168 STW- 1168 STW-1 168 STW-1169 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 07/07/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 10/06/08 Sr-89 Sr-90 Ba-133 Co-60 Cs-134 Cs-137 Zn-65 Gr. Alpha Gr. Beta 1-131 Ra-226 Ra-228 Uranium H-3 Sr-89 Sr-90 Ba-133 Co-60 Cs-134 Cs-137 Zn-65 Gr. Alpha Gr. Beta Ra-226 Ra-228 Uranium Sr-89 Sr-90 Ba- 133 Co-60 Cs-134 Cs-137 Zn-65 Gr. Alpha Gr. Beta 1-131 Ra-226 Ra-228 Uranium H-3 50.6 +/- 2.4 42.4 +/- 1.4 56.9 +/- 5.4 73.9 +/- 1.6 50.2 +/- 1.9 97.7 +/- 2.2 109.9 +/- 5.8 43.7 +/- 7.5 36.4 +/- 1.8 29.3 +/- 1.4 15.0 +/- 1.1 18.4 +/- 1.8 23.4 +/- 1.3 12551.0 +/- 207.0 24.9 +/- 3.5 39.7 +/- 0.5 45.0 +/- 1,2 24.9 +/- 3.0 90.4 +/- 5.3 57.1 +/- 2.8 102.9 +/- 7.3 24.8 +/- 1.6 23.9 +/- 0.9 8.0 +/- 0.6 7.7 +/- 0.8 11.2 +/-0.3 42.2 +/- 3.2 35.4 +/- 1.2 56.9 +/- 1.0 47.6 +/- 1.3 26.4 +/- 4.0 24.3 +/- 0.7 72.0 +/- 2.9 24.2 +/- 4.8 32.6 +/- 1.0 29.0 +/- 0.3 15.0 +/- 1.0 16.0 +/- 1.0 47.8 +/- 2.0 2357.0 +/- 66.0 60.4 39.2 58.3 76.6 46.6 102.0 106.0 50.8 51.4 28.7 15.3 17.0 24.6 12000.0 28.7 40.0 46.6 25.7 93.2 54.6 98.8 30.7 25.8 8.1 7.4 11.3 48.7 33.6 63.5 49.1 25.6 25.6 68.6 26.9 38.0 28.1 16.1 14.1 50.3 2220.0 48.6 -68.2 28.8 -45.1 48.3 -64.3 68.9 -86.7 37.4 -51.3 91.8-115.0 95.4 -126.0 26.5 -63.7 35.0 -58.4 23.9 -33.6 11.4 -17.6 11.4 -20.4 19.8 -27.6 10400.0 -13200.0 20.4 -35.3 29.4 -46.0 38.1 -51.8 22.3 -31.0 76.6 -102.0 49.1 -62.9 88.9-118.0 15.7 -40.0 16.1 -33.7 6.1 -9.5 4.7 -9.5 8.9 -13.0 38.2 -56.1 24.6 -38.8 52.8 -69.9 44.2 -56.6 19.7 -28.4 21.6 -31.2 61.2 -83.0 13.6 -35.5 25.1 -45.5 23.4 -33.0 12.0 -18.4 9.4 -17.1 40.8 -55.9 1830.0 -2460.0 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass.Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 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.

Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.Al-1 TABLE A-2. Crosscheck program results; Thermoluminescent Dosimetry, (TLD, CaSO 4: Dy Cards).mR Lab Code Date Known Lab Result Control Description Value + 2 sigma Limits Acceptance Environmental, Inc.2008-1 6/16/2008 40 cm. 30.23 33.87 +/- 1.17 21.16 -39.30 Pass 2008-1 6/16/2008 50 cm. 19.35 23.13 +/- 0.57 13.55 -25.16 Pass 2008-1 6/16/2008 60 cm. 13.44 16.25 +/- 1.10 9.41 -17.47 Pass 2008-1 6/16/2008 70 cm. 9.87 10.39 +/- 0.52 6.91 -12.83 Pass 2008-1 6/16/2008 80 cm. 7.56 7.44 +/- 0.51 5.29 -9.83 Pass 2008-1 6116/2008 90 cm. 5.97 5.80 +/- 1.04 4.18 -7.76 Pass 2008-1 6/16/2008 100 cm. 4.84 4.32 +/- 0.43 3.39 -6.29 Pass 2008-1 6/16/2008 120 cm. 3.36 2.69 +/- 0.15 2.35 -4.37 Pass 2008-1 6/16/2008 150 cm. 2.15 2.05 +/- 0.69 1.51 -2.80 Pass 2008-1 6/16/2008 180 cm. 1.49 1.23 +/- 0.80 1.04 -1.94 Pass Environmental, Inc.2008-2 11/17/2008 30 cm. 63.05 73.10 +/- 1.84 44.14 -81.97 Pass 2008-2 11/17/2008 40 cm. 35.46 40.80 +/- 2.30 24.82 -46.10 Pass 2008-2 11/17/2008 50 cm. 22.7 24.10 +/- 0.58 15.89 -29.51 Pass 2008-2 1111712008 60 cm. 15.76 15.98 +/- 0.55 11.03 -20.49 Pass 2008-2 11/17/2008 60 cm. 15.76 19.49 +/- 0.93 11.03 -20.49 Pass 2008-2 11/17/2008 70 cm. 11.58 11.97 +/- 0.54 8.11 -15.05 Pass 2008-2 11/17/2008 75 cm. 10.09 9.45 +/- 0.28 7.06 -13.12 Pass 2008-2 11/17/2008 80 cm. 8.87 9.30 +/- 0.18 6.21 -11.53 Pass 2008-2 11/17/2008 90 cm. 7.01 7.19 +/- 0.43 4.91 -9.11 Pass 2008-2 11/17/2008 90 cm. 7.01 6.84 +/- 0.42 4.91 -9.11 Pass 2008-2 11/17/2008 100 cm. 5.67 5.47 +/- 0.19 3.97 -7.37 Pass 2008-2 11/17/2008 110 cm. 4.69 3.98 +/- 0.27 3.28 -6.10 Pass 2008-2 11/17/2008 120 cm. 3.94 3.09 +/- 0.21 2.76 -5.12 Pass 2008-2 11/17/2008 120 cm. 3.94 3.12 +/- 0.34 2.76 -5.12 Pass 2008-2 11/17/2008 150 cm. 2.52 2.55 +/- 0.12 1.76 -3.28 Pass 2008-2 1111712008 150 cm. 2.52 2.24 +/- 0.08 1.76 -3.28 Pass 2008-2 11/17/2008 180 cm. 1.75 1.36 1 0.08 1.23 -2.28 Pass A2-1 TABLE A-3. In-House "Spike" Samples Concentration (pCi/L)a Lab Code b Date Analysis Laboratory results Known Control 2s, n=lc Activity Limits d Acceptance SPW-111 SPW-298 W-11708 SPW-711 SPAP-881 SPAP-881 SPAP-883 SPMI-885 SPW-887 SPW-889 W-31808 W-31808 SPMI-885 SPMI-885 SPW-887 SPW-887 SPW-1282 w-40308 SPW-5580 SPW-1562 SPW-1560 SPW-1621 W-51508 W-51508 SPAP-2673 SPAP-2673 SPAP-2674 SPF-2745 SPF-2745 SPMI-2677 SPMI-2677A SPW-2677 SPW-2677 SPMI-2679 SPMI-2679 SPMI-2679 SPMI-2679A SPVE-2681 SPW-2683 SPW-2685 SPW-2689 1/14/2008 1/31/2008 1/17/2008 2/25/2008 3/11/2008 3/11/2008 3/11/2008 3/11/2008 3/11/2008 3/11/2008 3/18/2008 3/18/2008 3/24/2008 3/24/2008 3/24/2008 3/24/2008 4/2/2008 4/3/2008 4/7/2008 4/8/2008 4/10/2008 4/16/2008 5/15/2008 5/15/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/3/2008 6/3/2008 6/3/2008 6/3/2008 6/3/2008 6/3/2008 6/3/2008 6/3/2008 6/3/2008 6/2/2008 6/2/2008 6/2/2008 Tc-99 Ni-63 Ra-226 U-238 Cs-134 Cs-137 Gr. Beta e Sr-90 Sr-90 H-3 Gr. Alpha Gr. Beta Cs-134 Cs-137 Cs-1 34 Cs-137 U-238 Ra-226 H-3 Ra-228 Tc-99 Fe-55 Gr. Alpha Gr. Beta Cs-134 Cs-137 Gr. Beta e Cs-134 Cs-137 Cs-137 1-131 Cs-134 1-131(G)Cs-134 Cs-137 1-131(G)1-131 1-131 (G)Ni-63 H-3 C-14 32.20 +/- 0.85 213.55 +/- 3.07 11.34 +/- 0.43 33.56 +/- 1.74 19.29 +/- 1.53 114.04 +/- 3.03 54.56 +/- 0.12 45.93 +/- 1.60 38.82 +/- 1.60 67325.00 +/- 725.00 19.51 +/- 0.40 47.20 +/- 0.42 40.93 +/- 1.55 61.36 +/- 2.82 40.68 +/- 1.44 58.52 +/- 2.93 41.30 +/- 1.78 15.17 +/- 0.50 211.02 +/- 7.71 28.93 +/- 2.09 29.74 +/- 0.84 27205.80 +/- 982.90 24.01 +/- 0.41 47.97 +/- 0.4.1 17.39 +/- 1.32 106.82 +/- 3.42 53.57 +/- 0.13 0.34 +/- 0.02 2.06 +/- 0.04 53.99 +/- 6.15 26.64 +/- 0.59 40.30 +/- 3.35 25.92 +/- 4.48 35.02 +/- 2.93 58.49 +/- 6.05 25.30 +/- 4.97 30.37 +/- 0.50 1.11 +/- 0.06 2151.70 +/- 10.22 64927.20 +/- 704.80 4405.40 +/- 15.21 32.34 212.58 12.69 41.70 20.09 113.90 51.64 45.13 45.13 67384.00 20.08 45;67 39.69 56.91 39.69 56.91 41.70 12.69 240.00 30.51 32.34 28370.00 20.08 45.68 18.60 113.30 51.40 0.37 2.27 56.66 28.58 37.21 28.58 37.21 56.66 28.58 28.58 0.95 2119.30 66540.80 4742'200 20.34 -44.34 148.81 -276.35 8.88 -16.50 29.19 -54.21 10.09 -30.09 102.51 -125.29 30.98 -72.30 36.10 -54.16 36.10 -54.16 53907.20 -80860.80 10.04 -.30.12 35.67- 55.67 29.69 -49.69 46.91 -66.91 29.69 -49.69 46.91 -66.91 29.19 -54.21 8.88 -16.50 0.00 -806.46 21.36 -39.66 20.34 -44.34 22696.00 -34044.00 10.04 -30.12 35.68 -55.68 8,60 -28.60 101.97 -124.63 30.84 -71.96 0.22 -0.52 1.36-3.18 46.66 -66.66 16.58 -40.58 27.21 -47.21 18.58 -38.58 27.211'- 47.21 46.66 -66.66 18.58 -38.58 16.58 -40.58 0.57 -1.33 1483.51 -2755.09 53232.64 -79848.96 2845.20 -6638.80 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass.A3-1 TABLE A-3. In-House "Spike" Samples Concentration (pCi/L)a Lab Code b Date Analysis Laboratory results Known Control 2s, n=1 Activity Limitsc Acceptance W-81408 SPW-1562 SPW-81808 W-81808 W-81808 W-112008 W-1 12008 SPAP-6839 SPAP-6839 SPAP-6841 SPW-6843 SPW-6845 SPW-6847 SPW-6849 SPW-6851 SPF-6859 SPF-6859 SPW-7059 SPMI-7061 8/14/2008 8/14/2008 8/18/2008 8/18/2008 8/18/2008 11/20/2008 11/20/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/512008 12/19/2008 12/19/2008 Ra-226 Ra-228 U-238 Gr. Alpha Gr. Beta Gr. Alpha Gr. Beta Cs-134 Cs-137 Gr. Beta e C-14 Fe-55 Tc-99 Ni-63 H-3 Cs-134 Cs- 137 Sr-90 Sr-90 12.98 +/- 0.35 29.09 +/- 2.46 42.59 +/- 1.96 21.36 +/- 0.42 49.33 +/- 1.01 20.13 +/- 0.40 48.28 +/- 0.42 15.39 +/- 2.72 111.45 +/- 9.85 49.26 +/- 0.12 19377.50 +/- 55.27 7068.30 +/- 692.30 37.71 +/- 1.33 232.56 +/- 3.26 63664.00 +/- 8745.00 0.63 +/- 0.02 2.35 +/- 0.01 49.19 +/- 2.62 39.39 +/- 2.19 12.69 30.51 41.70 20.08 45.68 20.08 45.60 15.68 112.00 50.72 23708.00 6028.00 32.34 211.34 64674.00 0.63 2.24 44.33 44.33 8.88 -16.50 21.36 -39.66 29.19 -54.21 10.04 -30.12 35.68 -55.68 10.04 -30.12 35.60 -55.60 5.68 -25.68 100.80 -123.20 30.43 -71.01 14224.80 -33191,20 4822.40 -7233.60 20.34 -44.34 147.94 -274.74 51739.20 -77608.80 0.38 -0.88 1.34 -3.14 35.46 -53.20 35.46 -53.20 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Liquid sample results are reported in pCi/Liter, air filters( pCi/filter), charcoal (pCi/m 3), and solid samples (pCi/g).Laboratory codes as follows: W (water), MI (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish).Results are based on single determinations.

Control limits are established from the precision values listed in Attachment A of this report, adjusted to +/- 2cr."Control limits based on the laboratory limit, Attachment A ("Other Analyses").

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 (pCi/L)a Lab Code Sample Date Analysisb Laboratory results (4.66a) Acceptance Type LLD Activityc Criteria (4.66 cy)SPW-17 SPW-112 W-11408 SPAP-880 SPAP-880 SPW-888 W-31808 W-31808 SPMI-884 SPMI-884 W-40308 SPW-1563 SPW-1 561 SPW-1621 SPW-2451 SPW-2676 SPW-2676 SPW-2676 SPW-2677 SPW-2677 SPW-2677 SPF-2744 SPF-2744 SPW-2676 SPMI-2678 SPVE-2680 SPW-3581 W-80708 W-80708 W-81408 SPW-1563 SPW-81808 Water Water Water Air Filter Air Filter Water Water Water Milk Milk Water Water Water Water Water Water Water Water Water Water Water Fish Fish Water Milk Vegetation Water Water Water Water Water Water 1/3/2008 1/14/2008 1/14/2008 3/111/2008 3/11/2008 3/11/2008 3/18/2008 3/18/2008 312412008 3/24/2008 4/3/2008 4/8/2008 4/10/2008 4/16/2008 5/22/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/2/2008 6/3/2008 6/3/2008 6/3/2008 7/14/2008 8/7/2008 8/7/2008 8/14/2008 8/14/2008 8/18/2008 U-238 Tc-99 Ra-226 Cs-134 Cs-137 H-3 Gr. Alpha Gr. Beta Cs-134 Cs-1 37 Ra-226 Ra-228 Tc-99 Fe-55 U-238 Cs-134 Cs-1 34 Cs-1 37 Cs-134 1-131(G)1-131(G)Cs-134 Cs-137 1-131 1-131 1-131(G)U-238 Gr. Alpha Gr. Beta Ra-226 Ra-228 U-238 0.09 4.70 0.05 0.91 1.13 159.99 0.42 0.72 2.79 3.36 0.04 0.57 4.77 668.50 0.21 2.03 3.60 2.38 2.78 3.49 5.25 5.48 4.83 0.18 0.22 0.01 0.10 0.63 1.43 0.06 0.79 0.18 0.01 +/- 0.07-0.06 +/- 2.85 0.05 + 0.04-78.90 + 80.40-0.05 +/- 0.29 0.09 +/- 0.51 0.05 +/- 0.03 0.31 +/- 0.30-3.42 +/- 2.85-170.70 +/- 397.20 0.35 + 0.24 0.01 +0.11 0.12 t 0.15 0.13 +/- 0.12-0.02 +/- 0.44-0.47 +/- 0.99 0.14 +/- 0.04 0.89 +/- 0.47 0.04 +/- 0.13 1 10 1 100 100 200 1 3.2 10 10 1 2 10 1000 1 10 10 10 10 20 20 100 100 0.5 0.5 20 1 1 3.2 1 2 1 A4-1 TABLE A-4. In-House "Blank" Samples Concentration (pCi/L)a Lab Code Sample Date Analysisb Laboratory results (4.66c) Acceptance Type LLD Activityc Criteria (4.66 a)W-112008 W-112008 SPAP-6838 SPAP-6838 SPAP-6840 SPW-6842 SPW-6844 SPW-6846 SPW-6848 SPF-6858 SPF-6858 SPW-7058 SPW-7058 SPW-7058 SPMI-7060 SPMI-7060 SPMI-7060 SPMI-7060 Water Water Air Filter Air Filter Air Filter Water Water Water Water Fish Fish Water Water Water Milk Milk Milk Milk 11120/2008 11/20/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/5/2008 12/19/2008 12/19/2008 12/19/2008 12/19/2008 12/19/2008 12/19/2008 12/19/2008 Gr. Alpha Gr. Beta Cs-134 Cs-137 Gr. Beta C-14 Fe-55 Tc-99 Ni-63 Cs-134 Cs-137 Cs-134 Cs-137 Sr-90 Cs-134 Cs-137 1-131(G)Sr-90 0.40 0.75 1.01 0.95 0.96 7.79 715.10 1.36 1.94 1.53 3.92 2.62 2.39 0.65 2.18 3.87 2.80 0.53 0.02 +/- 0.28-0.16 +/- 0.52 2.69 +/- 0.64-3.04 +/- 4.05 21.70 +/- 435.10-0.47 +/- 0.82 3.08 + 1.23-0.28 + 0.26 0.76 +/- 0.34 1 3.2 100 100 3.2 200 1000 10 20 100 100 10 10 1 10 20 1 a Liquid sample results are reported in pCi/Liter, air filters( pCi/filter), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).b 1-131(G);

iodine-1 31 as analyzed by gamma spectroscopy.

c Activity reported is a net activity result. For gamma spectroscopic analysis, activity detected below the LLD value is not reported.d Low levels of Sr-90 are still detected in the environment.

A concentration of (1-5 pCi/L) 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 Acceptance AP-8809, 8810 1/2/2008 CF-42, 43 1/2/2008 CF-42, 43 1/2/2008 DW-80020, 80021 1/7/2008 U-169, 170 1/10/2008 SO-8836, 8837 1/14/2008 SO-8836, 8837 1/14/2008 SO-8836, 8837 1/14/2008 SO-8836, 8837 1/14/2008 DW-80045, 80046 1/15/2008 DW-80045, 80046 1/15/2008 MI-138, 139 1/15/2008 LW-190, 191 1/16/2008 DW-8008, 8009 1/16/2008 DW-8008, 8009 1/16/2008 DW-80057, 80058 1/21/2008 DW-80057, 80058 1/21/2008 SWU-479, 480 1/29/2008 W-920, 921 2/4/2008 SW-540, 541 2/12/2008 SW-540, 541 2/12/2008 DW-80155, 80156 b 2/12/2008 DW-80155, 80156 2/12/2008 DW-80165, 80166 2/20/2008 DW-80166, 80167 2/20/2008 DW-80166, 80167 2/20/2008 DW-80166, 80167 2/20/2008 W-1413, 1414 3/3/2008 DW-80189, 80190 3/11/2008 DW-80189, 80190 3/11/2008 MI-1006, 1007 3/12/2008 MI-1006, 1007 3/12/2008 DW-80205, 80206 3/14/2008 DW-80202, 80203 3/14/2008 DW-80202, 80203 3/14/2008 DW-80208, 80209 3/14/2008 SG-1080, 1081 3/18/2008 SO-1195, 1196 3/18/2008 SO-1195, 1196 3/18/2008 WW-1242, 1243 3/24/2008 Be-7 Gr. Beta K-40 Gr. Alpha Beta-K40 Cs-1 37 Gr. Alpha Gr. Alpha K-40 Gr. Alpha Gr. Beta K-40 Gr. Beta Ra-226 Ra-228 Gr. Alpha Gr. Beta Gr. Beta Gr. Beta Gr. Alpha Gr. Beta Ra-226 Ra-228 Gr. Alpha Ra-226 Ra-228 Uranium Gr. Beta Ra-226 Ra-228 K-40 Sr-90 Gr. Alpha Ra-226 Ra-228 U-233/4 Pb-2114 U-233/4 U-238 Gr. Beta Be-7 Gr. Alpha Gr. Beta 0.06 + 0.02 8.88 +/- 0.19 5.08 +/- 0.29 2.28 +/- 0.84 7.50 +/- 5.50 0.80 +/- 0.05 13.30 + 4.31 33.68 +/- 3.73 12.31 + 0.74 2.94 + 1.13 1.86 +/- 0.66 1262.40 +/- 81.70 2.85 +/- 1.07 2.77 +/- 0.20 3.95 +/- 0.74 6.77 +/- 0.66 13.83 +/- 0.97 4.49 +/- 1.13 4.20 +/- 1.30 2.75 +/- 1.16 6.46 +/- 1.11 2.55 +/- 0.22 1.86 +/- 0.70 1.51 +/- 0.90 0.40 +/- 0.09 1.44 +/- 0.52 0.69 +/- 0.25 7.50 +/- 3.00 4.41 +/- 0.30 1.99 +/- 0.65 1451.90 +/- 112.80 0.48 +/- 0.31 3.64 +/- 0.80 3.16 +/- 0.21 2.40 +/- 1.00 1.32 +/- 0.25 3.99 +/- 0.30 0.14 +/- 0.02 0.13 +/- 0.02 10.36 +/- 1.63 0.06 +/- 0.01 8.99 +/- 0.19 5.19 +/- 0.30 1.98 +/- 0.86 11.70 +/- 5.10 0.75 +/- 0.05 15.58 +/-4.10 29.21 +/- 3.10 12.96 +/- 0.73 3.41 +/- 1.04 1.36 +/- 0.63 1396.20 +/- 154.20 1.64 +/- 1.02 3.11 +/-0.22 3.96 +/- 0.77 7.91 +/- 1.73 14.78 +/- 1.01 3.13 +/- 1.14 3.30 +/- 1.30 4.01 +/- 1.18 6.71 +/- 1.03 2.01 +/- 0.16 1.53 +/- 0.67 0.80 +/- 1.05 0.46 +/- 0.09 1.42 +/- 0.57 0.69 +/- 0.26 3.70 +/- 2.60 4.09 +/- 0.25 2.17 +/- 0.66 1409.50 +/- 111.40 0.97 +/- 0.38 3.39 +/- 0.82 3.00 1 0.19 2.07 +/- 0.69 1.29 +/- 0.36 4.15 +/- 0.29 0.14 +/- 0.02 0.13 +/- 0.02 9.06 +/- 1.55 0.06 +/- 0.01 8.94 +/- 0.13 5.14 +/- 0.21 2.13 +/- 0.60 9.60 +/- 3.75 0.77 +/- 0.03 14.44 +/- 2.98 31.45 +/- 2.43 12.64 +/- 0.52 3.17 +/- 0.77 1.61 +/- 0.45 1329.30 +/- 87.25 2.24 +/- 0.74 2.94 +/- 0.15 3.96 +/- 0.53 7.34 +/- 0.92 14.31 +/- 0.70 3.81 +/- 0.80 3.75 +/- 0.92 3.38 +/- 0.83 6.59 +/- 0.76 2.28 +/- 0.14 1.70 +/- 0.48 1.16 +/- 0.69 0.43 +/- 0.06 1.43 +/- 0.39 0.69 +/- 0.18 5.60 +/- 1.98 4.25 +/- 0.20 2.08 +/- 0.46 1430.70 +/- 79.27 0.72 +/- 0.24 3.52 +/- 0.57 3.08 + 0.14 2.24 +/- 0.61 1.31 +/- 0.22 4.07 +/- 0.21 0.14 +/- 0.01 0.13 +/- 0.01 9.71 +/- 1.13 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass AP-1519, 1520 W-1565,1566 W-1565,1566' 4/2/2008 4/2/2008 4/2/2008 0.07 +/- 0.01 0.82 +/- 0.64 3.73 +/- 0.86 0.08 +/- 0.01 1.58 +/- 0.72 5.51 +/- 1.09 0.08 +/- 0.01 1.20 +/- 0.48 4.62 +/- 0.69 A5-1 TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance DW-80255, 80256 DW-80255, 80256 DW-80259, 80260 DW-80301, 80302 DW-80301, 80302 SO-1913,1914 DW-80313, 80314 DW-80313, 80314 SWU-2087, 2088 LW-2297, 2298 LW-2321, 2322 BSw2063, 2064 SG-2229, 2230 W-2792,2793 SG-2229, 2230 F-2850, 2851 DW-80376, 80377 DW-80376, 80377 MI-2363, 2364 SG-2752, 2753 SG-2752, 2753 SG-2752, 2753 SG-2752, 2753 SG-2752, 2753 DW-80389, 80390 DW-80389, 80390 DW-80392, 80393 DW-80394, 80395 BS-2490, 2491 WW-2462, 2463 W-2826,2827 W-2826,2827 SG-3378, 3379 SG-3378, 3379 SG-3393,3394 SG-3393,3394 SG-3393, 3394 SG-3393, 3394 SG-3393, 3394 LW-2939, 2940 WW-3053, 3054 SW-3154, 3155 4/8/2008 4/8/2008 4/8/2008 4/11/2008 4/11/2008 4/15/2008 4/16/2008 4/16/2008 4/29/2008 4/30/2008 4/30/2008 5/1/2008 5/5/2008 5/5/2008 5/5/2008 5/7/2008 5/9/2008 5/9/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/14/2008 5/16/2008 5/19/2008 5/27/2008 5127/2008 6/2/2008 6/2/2008 6/4/2008 6/4/2008 6/4/2008 6/4/2008 6/4/2008 6/12/2008 6/17/2008 6/24/2008 Ra-226 Ra-228 Gr. Alpha Ra-226 Ra-228 K-40 Ra-226 Ra-228 Gr. Beta Gr. Beta Gr. Beta Gr. Beta Ac-228 Gr. Beta Pb-214 Cs-137 Ra-226 Ra-228 K-40 Be-7 Cs-137 Gr. Alpha Gr. Beta K-40 Ra-226 Ra-228 Gr. Alpha U-233/4 Cs-137 H-3 Gr. Alpha Gr. Beta Gr. Alpha Gr. Beta Be-7 Cs-1 37 Gr. Alpha Gr. Beta K-40 Gr. Beta Gr. Beta Gr. Beta 0.19 +/- 0.08 1.79 +/- 0.57 3.39 +/- 0.82 0.47 +/- 0.09 1.02 +/- 0.42 12.79 +/- 0.73 3.39 +/- 0.22 4.27 +/- 0.72 2.20 +/- 0.60 1.41 +/- 0.43 1.33 +/- 0.54 13.71 +/- 2.06 26.25 +/- 2.70 7.20 +/- 2.30 23.28 +/- 0.30 3.37 +/- 0.21 0.94 +/- 0.13 2.05 +/- 0.57 1335.40 +/- 111.20 264.60 +/- 83.90 64.80 +/- 6.00 19.35 +/- 3.48 30.53 +/- 2.40 9121.90 +/- 191.80 2.99 +/- 0.36 2.87 +/- 0.68 19.94 +/- 1.30 2.03 +/- 0.27 6.81 +/- 1.20 158.61 +/- 80.90 3.47 +/- 2.23 10.67 +/- 1.92 6.51 +/- 1.15 16.23 +/- 0.95 0.82 +/- 0.23 0.07 +/- 0.01 18.96 +/- 3.49 30.01 +/- 2.49 9.78 +/- 0.30 1.46 +/- 0.59 4.28 +/- 0.83 2.15 +/- 1.01 0.28 +/- 0.11 1.32 +/- 0.55 3.62 +/- 0.82 0.47 +/- 0.09 0.82 +/- 0.45 13.88 +/- 0.85 3.28 +/- 0.21 5.14 +/- 0.77 3.50 +/- 0.90 1.02 +/- 0.40 1.23 +/- 0.54 17.60 +/- 2.49 24.90 +/- 2.55 7.00 +/- 2.50 23.54 +/- 0.33 3.16 +/- 0.19 1.07 +/- 0.13 1.40 +/- 0.51 1510.70 +/- 124.30 222.80 +/- 93.10 68.90 +/- 5.80 22.88 +/- 4.04 33.31 +/- 2.71 9183.70 +/- 194.20 2.58 +/- 0.31 1.73 +/- 0.57 17.89 +/- 1.26 2.54 +/- 0.39 6.76 +/- 1.23 205.63 +/- 83.06 4.22 +/- 2.20 9.43 +/- 1.76 7.83 +/- 1.32 15.76 +/- 1.06 0.66 +/- 0.33 0.07 +/- 0.01 16.96 +/- 3.34 30.17 +/- 2.56 10.00 +/- 0.28 1.74 +/- 0.59 5.27 +/- 0.91 2.79 +/- 0.97 0.24 +/- 0.07 1.56 +/- 0.40 3.51 +/- 0.58 0.47 +/- 0.06 0.92 +/- 0.31 13.34 +/- 0.56 3.34 +/- 0.15 4.71 +/- 0.53 2.85 +/- 0.54 1.22 +/- 0.30 1.28 +/- 0.38 15.66 +/- 1.62 25.58 +/- 1.86 7.10 +/- 1.70 23.41 +/- 0.22 3.27 +/- 0.14 1.01 +/- 0.09 1.73 +/- 0:38 1423.05 +/- 83.39 243.70 +/- 62.66 66.85 +/- 4.17 21.12 +/- 2.67 31.92 +/- 1.81 9152.80 +/- 136.47 2.79 +/- 0.24 2.30 +/- 0.44 18.92 +/- 0.91 2.29 +/- 0.24 6.78 +/- 0.86 182.12 +/- 57.97 3.84 +/- 1.57 10.05 +/- 1.30 7.17 +/- 0.88 16.00 +/- 0.71 0.74 +/- 0.20 0.07 +/- 0.01 17.96 +/- 2.42 30.09 +/- 1.79 9.89 +/-0.21 1.60 +/- 0.42 4.77 +/- 0.61 2.47 +/- 0.70 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass A5-2 TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance BS-3245, 3246 BS-3245, 3246 XW-1080, 1081 XW-3786, 3787 G-3274, 3275 SL-3295, 3296 AP-3531, 3532 AP-3663, 3664 AP-3690, 3691 W-4333, 4334 W-4840, 4841 DW-80415, 80416 SG-3964, 3965 SG-3964, 3965 SG-3964, 3965 SG-3964, 3965 SG-3964, 3965 DW-80427, 80428 DW-80427, 80428 DW-80451, 80452 DW-80451, 80452 DW-80481, 80482 DW-80481, 80482 MI-3842, 3843 MI-3892, 3893 DW-4067, 4068 SWT-4158, 4159 LW-4221, 4222 LW-4242, 4243 VE-4046, 4047 VE-4046, 4047 VE-4046, 4047 W-4821, 4822 W-4821, 4822 W-4801, 4802 W-4801, 4802 DW-80522, 80523 DW-80522, 80523'6/27/2008 6/27/2008 6/30/2008 6/30/2008 7/1/2008 7/1/2008 7/1/2008 7/2/2008 7/2/2008 7/7/2008 7/7/2008 7/7/2008 7/9/2008 7/9/2008 7/9/2008 7/9/2008 7/9/2008 7/9/2008 7/9/2008 7/15/2008 7/15/2008 7/16/2008 7/16/2008 7/21/2008 7/28/2008 7/29/2008 7/29/2008 7/31/2008 7/31/2008 8/4/2008 8/4/2008 814/2008 8/4/2008 8/4/2008 8/5/2008 8/5/2008 8/5/2008 8/5/2008 Co-60 Cs-137 Fe-55 Fe-55 Gr. Beta Gr. Beta Be-7 Be-7 Be-7 Gr. Beta Gr. Beta Ra-226 Be-7 Cs-137 Gr. Alpha Gr. Beta K-40 Ra-226 Ra-228 Ra-226 Ra-228 Ra-226 Ra-228 K-40 K-40 Gr. Beta Gr. Beta Gr. Beta Gr. Beta Be-7 Gr. Beta K-40 Gr. Alpha Gr. Beta Gr. Alpha Gr. Beta Ra-226 Ra-228 108.84 +/- 44.14 952.18 +/- 52.78 2.96 +/- 0.32 2.96 +/- 0.32 7.65 +/- 0.24 3.76 +/- 0.24 0.10 +/- 0.0i 0.08 +/- 0.01 0.07 +/- 0.01 7.20 +/- 1.90 6.70 +/- 1.60 2.81 +/- 0.47 1.35 +/- 0.23 0.04 +/- 0.01 23.17 +/- 3.39 28.99 +/- 2.12 6.86 +/- 0.19 3.25 +/- 0.24 2.65 +/- 0.67 1.02 +/- 0.10 1.09 +/- 0.62 1.20 +/- 0.13 1.69 +/- 0.68 1282.60 +/- 108.30 1371.50 +/- 102.90 10.46 +/- 2.37 1.58 +/- 0.45 1.35 +/- 0.56 1.36 +/- 0.56 0.77 +/- 0.13 8.81 +/- 0.36 5.17 +/- 0.34 1.70+/- 0.80 3.90 +/- 0.80 4.40 +/- 2.40 13.20 +/- 1.30 0.50 +/- 0.12 1.23 +/- 0.60 91.10 +/- 22.32 941.56 +/- 13.61 2.71 +/- 0.30 2.71 +/- 0.30 7.44 +/- 0.24 3.64 +/- 0.24 0.08 +/- 0.01 0.08 +/- 0.02 0.07 +/- 0.01 7.70 +/- 1.70 6.70 +/- 1.80 2.00 +/- 0.34 1.51 +/- 0.22 0.04 +/- 0.01 18.76 +/- 3.24 29.25 +/- 2.31 6.84 +/- 0.17 3.27 +/- 0.20 3.25 +/- 0.72 0.96 +/-0.12 1.14 +/- 0.60 1.40 +/- 0.14 1.65 +/- 0.77 1379.00 +/- 111.40 1501.20 +/- 111.80 14.25 +/- 2.78 1.80 +/- 0.47 0.91 +/- 0.52 1.18 +/- 0.53 0.82 +/- 0.19 8.34 +/- 0.31 5.33 +/- 0.42 1.70 +/- 0.90 3.70 +/- 0.90 4.80 +/- 2.30 14.50 +/- 1.40 0.28 +/- 0.12 1.09 +/- 0.57 99.97 +/- 24.73 946.87 +/- 27.25 2.84 +/- 0.22 2.84 +/- 0.22 7.55 +/- 0.17 3.70 +/- 0.17 0.09 +/- 0.01 0.08 +/- 0.01 0.07 +/- 0.01 7.45 +/- 1.27 6.70 +/- 1.20 2.41 +/- 0.29 1.43 +/- 0.16 0.04 +/- 0.00 20.97 +/- 2.34 29.12 +/- 1.57 6.85 +/- 0.13 3.26 +/- 0.16 2.95 +/- 0.49 0.99 +/- 0.08 1.12 +/- 0.43 1.30 +/- 0.10 1.67 +/-0.51 1330.80 +/- 77.68 1436.35 +/- 75.97 12.36 +/- 1.83 1.69 +/- 0.33 1.13 +/- 0.38 1.27 +/- 0.38 0.80 +/- 0.12 8.58 +/- 0.24 5.25 +/- 0.27 1.70 + 0.60 3.80 +/- 0.60 4.60 +/- 1.66 13.85 +/- 0.96 0.39 +/- 0.08 1.16 +/- 0.41 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass A5-3 TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance DW-80531, 80532 DW-80534, 80535 DW-80534, 80535 SG-4584, 4585 SG-4584, 4585 SG-4584, 4585 SG-4584, 4585 SG-4573, 4574 SG-4573, 4574 SG-4584, 4585 SG-4584, 4585 DW-80547, 80548 DW-80551, 80552 DW-80553, 80554 DW-80553, 80554 DW-80566, 80567 DW-80566, 80567 VE-4647, 4648 SL-4690, 4691 ME-4732, 4733 ME-4732, 4733 SG-5180, 5181 SG-5180, 5181 SG-5180, 5181 SG-5180, 5181 SG-5180, 5181 SG-5187, 5188 SG-5187, 5188 SG-5193, 5194 SG-5193, 5194 DW-4871, 4872 VE-5022, 5023 DW-5337, 5338 WW-4977, 4978 BS-5088, 5089 DW-80584, 80585 DW-80584, 80585 DW-80579, 80580 DW-80579, 80580 DW-80579, 80580 G-5389, 5390 G-5389, 5390 G-5389, 5390 8/5/2008 8/5/2008 8/5/2008 8/6/2008 8/6/2008 8/6/2008 8/6/2008 8/13/2008 8/13/2008 8/13/2008 8/13/2008 8/13/2008 8/13/2008 8/13/2008 8/13/2008 8/20/2008 8/20/2008 8/27/2008 9/2/2008 9/2/2008 9/2/2008 9/3/2008 9/3/2008 9/3/2008 9/3/2008 9/3/2008 9/3/2008 9/3/2008 9/3/2008 9/3/2008 9/5/2008 9/10/2008, 9/10/2008 9/17/2008 9/19/2008 9/19/2008 9/19/2008 9/25/2008 9/25/2008 9/25/2008 10/1/2008 10/1/2008 10/1/2008 Gr. Alpha Ra-226 Ra-228 Be-7 Cs-137 K-40 Ra-226 Gr. Alpha Gr. Beta Gr. Alpha Gr. Beta Gr. Alpha U-233/4 Ra-226 Ra-228 Ra-226 Ra-228 K-40 Gr. Beta Gr. Beta K-40 Be-7 Cs-137 Gr. Alpha Gr. Beta K-40 Be-7 K-40 Gr. Alpha Gr. Beta 1-131 K-40 Gr. Beta Gr. Beta K-40 U-233/4 U-238 Gr. Alpha Ra-226 Ra-228 Be-7* .:Gr. Beta K-40 18.90 +/- 1.86 3.01 +/- 0.18 2.24 +/- 0.59 7.11 +/- 0.20 0.05 +/- 0.01 7.88 +/- 10.18 3.94 +/- 0.18 240.72 +/- 8.74 201.60 +/- 4.28 14.07 +/- 3.10 22.08 +/- 2.36 3.33 +/- 1.11 2.57 +/- 0.48 0.92 +/- 0.14 2.20 +/- 0.61 1.10 +/- 0.11 2.01 +/- 0.58 1.97 +/-0.17 2.28 +/- 0.25 2.86 +/- 0.09'2.44 +/- 0.37 15.50 +/- 0.43 0.07 +/- 0.01 18.74 +/- 3.33 29.19 +/-2.10 8,55 +/- 0.32 6.18 +/- 0.54 7.16 +/- 0.60 5.80 +/- 1.30 15.60 +/- 1.10 1.15 +/- 0.27 1.27 +/- 0.14 3.00 +/- 1.07 3.71 +/- 1.10 10493 +/-607 3.01 +/- 0.52 0.70 +/- 0.25 10.69 +/- 1.31 3.13 +/- 0.22 3.03 +/- 0.73 1.49 +/- 0.32 10.86 +/- 0.24 7.42 +/- 0.67 17.80 +/- 1.96 3.33 +/- 0.18 2.12 +/- 0.59 7.44 +/- 0.37 0.04 +/- 0.01 8.02 +/- 0.21 3.74 +/- 0.22 251.53 +/- 9.56 206.88 +/- 4.71 12.97 +/- 3.04 23.02 +/- 2.34 3.88 +/- 1.07 2.13 +/- 0.46 1.21 +/- 0.17 1.64 +/- 0.56 1.10 +/- 0.10 1.74 +/- 0.58 2.00 +/- 0.21 2.35 +/- 0.24 2.70 +/- 0.09 2.82 +/- 0.51 15.54 +/- 0.38 0.07 +/- 0.01 17.61 +/- 3.15 28.49 +/- 2.15 8.11 +/- 0.27 5.90 +/- 0.77 7.29 +/- 0.60 7.00 +/- 1.50 15.60 +/- 1.10 1.16 +/- 0.31 1.11 +/- 0.06 2.19 +/- 1.05 2.32 +/- 1.11 10299 +/- 470 2.44 + 0.47 0.27 +/- 0.18 12.84 +/- 1.51 2.89 +/- 0.21 1.98 +/- 0.69 1.36 +/- 0.28 11.18 +/-0.25 8.06 +/- 0.63 18.35 +/- 1.35 3.17 +/- 0.13 2.18 +/- 0.42 7.27 +/- 0.21 0.04 +/- 0.00 7.95 +/- 5.09 3.84 +/- 0.14 246.13 +/- 6.48 204.24 +/- 3.18 13.52 +/- 2.17 22.55 +/- 1.66 3.61 +/- 0.77 2.35 +/- 0.33 1.07 +/- 0.11 1.92 +/- 0.41 1.10 +/- 0.07 1.88 +/- 0.41 1.99 +/- 0.14 2.32 +/- 0.17 2.78 +/- 0.06 2.63 + 0.32 15.52 +/- 0.29 0.07 +/- 0.01 18.18 +/- 2.29 28.84 +/- 1.50 8.33 +/- 0.21 6.04 +/- 0.47 7.23 +/- 0.42 6.40 +/- 0.99 15.60 +/- 0.78 1.16 +/- 0.21 1.19 +/- 0.08 2.60 +/- 0.75 3.01 +/- 0.78 10396 +/- 384 2.73 +/- 0.35 0.49 +/- 0.15 11.77 +/- 1.00 3.01 +/- 0.15 2.51 + 0.50 1.43 +/- 0.21 11.02 +/-0.17 7.74 +/- 0.46 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass A5-4 TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-5814, 5815 SG-6111, 6112 SG-6111, 6112 DW-80592, 80593 DW-80594, 80595 DW-80650, 80651 DW-80650, 80651 DW-80629, 80630 DW-80629, 80630 DW-80663, 80664 MI-5572, 5573 MI-5603, 5604 DW-80676, 80677 DW-80676, 80677 DW-80676, 80677 SW-80687, 80688 DW-80729, 80730 DW-80729, 80730 DW-80738, 80739 DW-80747, 80748 DW-80747, 80748 BS-6271, 6272 SS-6593, 6594 MI-7046, 7047 DW-80698, 80699 DW.80698, 80699 SW-7281, 7282 10/1/2008 10/6/2008 10/6/2008 10/7/2008 10/7/2008 10/8/2008 10/8/2008 10/13/2008 10/13/2008 10/13/2008 10/14/2008 10/14/2008 10/20/2008 10/20/2008 10/20/2008 10/22/2008 10/30/2008 10/30/2008 10/31/2008 10/31/2008 10/31/2008 11/3/2008 11/19/2008 12/16/2008 12/23/2008 12/23/2008 12/30/2008 Be-7 Gr. Alpha Gr. Beta Gr. Alpha Ra-228 Gr. Alpha Gr. Beta Ra-226 Ra-228 Gr. Alpha K-40 K-40 Gr. Alpha Ra-226 Ra-228 Gr. Alpha Gr. Alpha Gr. Beta U-233/4 Ra-226 Ra-228 Gr. Beta K-40 K-40 Ra-226 Ra-228 Gr. Beta 0.08 +/- 0.01 9.34 +/- 1.82 17.46 +/- 1.46 2.30 +/- 1.14 1.41 +/- 0.55 1.30 +/- 0.86 2.92 +/- 0.69 3.12 +/- 0.18 2.71 +/- 0.80 5.91 +/- 1.70 1391.00 +/- 97.39 1412.80 +/- 109.30 12.20 +/- 1.48 5.04 +/- 0.25 5.87 +/- 0.86 3.42 +/- 1.03 8.40 +/- 1.45 16.94 +/- 1.45 2.94 +/- 0.50 0.60 +/- 0.09 1.33 +/- 0.59 12.26 +/- 1.69 12.35 +/- 0.57 1380.10 +/- 109.80 3.13 +/- 0.22 5.48 +/- 0.91 0.87 +/- 0.54 0.08 +/- 0.01 8.95 +/- 1.67 18.86 +/- 1.35 1.57 +/- 0.88 1.22 +/- 0.50 0.12 +/- 0.79 3.03 +/- 0.64 2.87 +/- 0.17 3.28 +/- 0.81 3.14 +/- 1.44 1443.90 +/- 110.60 1413.80 +/- 110.50 11.87 +/- 1.54 5.10 +/- 0.25 6.98 +/- 0.95 2.98 +/- 1.01 7.76 +/- 2.00 15.41 +/- 1.37 3.06 +/- 0.63 0.50 +/- 0.08 1.38 +/- 0.60 13.78 +/- 1.84 13.10 +/- 0.76 1477.30 +/- 98.32 3.21 +/- 0.23 5.86 +/- 0.93 1.35 +/- 0.54 0.08 +/- 0.01 9.15 +/- 1.24 18.16 +/- 0.99 1.94 +/- 0.72 1.32 +/- 0.37 0.71 +/- 0.58 2.98 +/- 0.47 3.00 +/- 0.12 3.00 +/- 0.57 4.53 +/- 1.11 1417.45 +/- 73.68 1413.30 +/- 77.71 12.04 +/- 1.07 5.07 +/- 0.18 6.43 +/- 0.64 3.20 +/- 0.72 8.08 +/- 1.24 16.18 +/- 1.00 3.00 +/- 0.40 0.55 +/- 0.06 1.36 +/- 0.42 13.02 +/- 1.25 12.73 +/- 0.48 1428.70 +/- 73.69 3.17 +/- 0.16 5.67 +/- 0.65 1.11 +0.38 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 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 A program deviation report is on file. The calculation, instrument background and perfomance test were satisfactory.

A5-5 TABLE A-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)a.Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STW-1 137 STW-1 137 STW-1 137 STW-1137 STW-1 137 STW-1 137 STW-1137 STW-1 137 STW-1137 STW-1 137 STW-1137 STW-1137 STW-1137 STW-1137 STW-1 137 STW-1 137 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 Am-241 Co-57 Co-60 Cs-134 Cs-137 Fe-55 H-3 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 Tc-99 U-233/4 U-238 Zn-65 STW-1138 01/01/08 Gr, Alpha STW-1138 01/01/08 Gr. Beta STAP-1 139 STAP-1 139 STAP-1 139 STAP-1 139 STAP-1 139 STAP-1 139 STAP-1 139 STAP-1 139 STAP-1 139e STAP-1 139e STAP-1 139 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 1.27 +/- 0.06 23.80 +/- 0.60 8.60 1 0.50-0.02 +/-0.10 0.00 +/- 0.10 32.60 + 11.60 515.10 + 12.70 12.90 + 0.80 29.50 +/- 2.30 0.60 + 0.06 0.019 +/- 0.015 12.00 +/- 1.50 9.40 +/- 1.70 3.37 +/- 0.20 3.63 +/- 0.21 16.90 +/- 1.40 0.96 +/- 0.14 2.30 +/- 0.15 3.90 +/- 0.07 1.43 +/- 0.07 2.59 +/- 0.16 3.05 +/- 0.12 0.43 +/- 0.58 0.080 +/- 0.016 0.12 +/- 0.02 1.30 +/- 0.27 0.43 +/- 0.03 0.44 +/- 0.03 2.36 +/- 0.18 0.11 +/- 0.03 0.34 +/- 0.04 8.30 +/- 0.18 3.03 +/- 0.13 6.53 +/- 0.29 3.90 +/- 0.19 5.43 +/- 0.21 0.033 +/- 0.10 1.23 22.80 8.40 0.00 0.00 36.50 472.00 12.10 30.70 0.73 0.01 11.40 11.20 3.63 3.74 16.30 1.40 2.43 0.86 -1.60 16.00 -29.60 5.88 -10.92-1.00 -1.00-1.00 -1.00 25.60 -47.50 330.00 -614.00 8.50 -15.70 21.50 -39.90 0.51 -0.95 0.00 -1.00 7.98 -14.82 7.80 -14.60 2.54 -4.72 2.62 -4.86 11.40 -21.20 0.00 -2.80 1.22 -3.65 3.55 1.31 2.52 2.70 0.00 0.11 0.11 1.55 0.22 0.23 2.04 0.35 0.29 6.89 2.77 6.28 3.41 4.74 0.00 2.49 -4.62 0.92 -1.70 1.76 -3.28 1.89-3.51 0.00 -1.00 0.07 -0.14 0.08 -0.15 1.08 -2.01 0.15 -0.28 0.16 -0.29 1.43 -2.65 0.00 -0.70 0.14 -0.43 4.82 -8.96 1.94-3.60 4.40 -8.16 2.39 -4.43 3.32 -6.16 0.00 -1.00 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Fail Pass Pass Pass Pass Pass Pass Pass Pass Pass STAP-1140 01/01/08 Gr. Alpha STAP-1140 01/01/08 Gr. Beta STVE-1 141 STVE-1 141 STVE-1 141 STVE-1 141 STVE-1 141 STVE-1 141 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Zn-65 A6-1 TABLE A-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)a.Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 142 STSO-1 158 STSO-1158 STSO-1 158 STSO-1 158 STSO-1 158 STSO-1158 STSO-1 158 STSO-1 158 STSO-1 158 STSO-1 158 STSO-i 158 STSO-1158 t STSO-1 158 STSO-1 158 STVE-1 159 STVE-1 159 STVE-1 159 STVE-1159 STVE-1 159 STVE-1 159 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01/01/08 01101/08 01/01/08 01/01/08 01/01/08 01/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08!01(08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01/08 08/01108 08/01/08 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Ni-63 Pu-238 Pu-239/40 U-233/4 U-238 Zn-65 Am-241 Co-57 Co-60 Cs-1 34 Cs-137 K-40 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 Tc-99 U-238 Zn-65 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Zn-65 483.00 +/- 3.00 3.00 +/- 0.80 896.50 +/- 7.40 624.40 +/- 4.10 667.20 +/- 3.80 536.00 +/- 15.50 78.60 +/- 4.80 89.10 +/- 4.50 134.41 +/- 5.40 139.00 +/- 5.50 0.093 +/- 0.91 57.73 +/- 4.78 353.02 +/- 2.01 151.99 +/- 1.58 499.72 +/- 2.65 2.54 +/- 0.25 643.94 +/- 15.50 452.14 +/- 2.96 803.09 +/- 17.01 0.12 +/- 0.54 60.88 + 5.89 1.95 +/- 2.04 337.00 + 17.30 315.67 +/- 11.29 0.10 +/- 2.04 8.52 +/- 0.23 5.08 +/- 0.19 5.26 +/- 0.18 0.01 +/- 0.14 6.39 +/- 0.28 7.73 +/- 0.45 421.00 2.90 854.00 545.00 570.00 640.00 72.80 90.10 142.00 148.00 0.00 69.10 333.00 145.00 581.00 2.80 570.00 415.00 760.00 0.00 55.60 0.00 335.00 303.00 0.00 7.10 4.70 5.50 0.00 5.80 6.90 295.00 -547.00 0.00 -5.00 598.00 -1110.00 382.00 -709.00 399.00 -741.00 448.00 -832.00 51.00 -94.60 63.10-117.10 99.00 -185.00 104.00 -192.00 0.00 -1.00 48.40 -89.80 233.00 -433.00 102.00 -189.00 407.00 -755.00 0.00 -5.00 399.00 -741.00 291.00 -540.00 532.00 -988.00 0.00 -5.00 38.90 -72.30 0.00 -5.00 235.00 -436.00 212.00 -394.00 0.00 -5.00 5.00 -9.20 3.30 -6.10 3.90 -7.20 0.00 -1.00 4.10 -7.50 4.80 -9.00 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass A6-2 TABLE A-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)a.Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STW-1162 t 08/01/08 Am-241 0.20 +/- 0.06 0.00 0.00 -0.10 Fail STW-1162 08/01/08 Co-57 0.03 +/- 0.16 0.00 0.00 -5.00 Pass STW-1162 08/01/08 Co-60 11.27 +/- 0.23 11.60 8.10-15.10 Pass STW-1162 08/01/08 Cs-134 17.93 +/- 0.52 19.50 13.70 -25.40 Pass STW-1162 08/01/08 Cs-137 23.72 +/- 0.43 23.60 16.50 -30.70 Pass STW-1162 08/01/08 Fe-55 43.36 +/- 16.81 46.20 32.30 -60.10 Pass STW-1162 08/01/08 H-3 385.15 +/- 8.93 341.00 239.00 -443.00 Pass STW-1162 08/01/08 Mn-54 13.87 +/- 0.37 13.70 9.60-17.80 Pass STW-1 162 08/01/08 Ni-63 10.77 +/- 2.01 0.00 0.00 -5.00 Fail STW-1 162 08/01/08 Pu-238 0.33 +/- 0.06 0.50 0.40 -0.70 Fail STW-1 162 08/01/08 Pu-239/40 0.14 +/- 0.15 0.00 0.00 -0.20 Pass STW-1162 08(01/08 Sr-90 6.49 +/- 1.12 6.45 4.52 -8.39 Pass STW-1162 08/01/08 Tc-99 1.80 +/- 0.62 3.76 2.63 -4.89 Fail STW-1162 08/01/08 U-233/4 3.33 +/- 0.18 3.44 2.41 -4.47 Pass STW-1162 08/01/08 U-238 3.38 +/- 0.18 3.55 2.49 -4.62 Pass STW-1162 08/01/08 Zn-65 17.64 +/- 0.61 17.10 12.00 -22.20 Pass STW-1163 08/01/08 Gr. Alpha 0.08 +/- 0.04 0.00 0.00 -0.56 Pass STW-1163 08101/08 Gr. Beta 0.12 +/- 0.05 0.00 0.00 -1.85 Pass Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

d MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP.8 The results of a repeat analysis were still unacceptable.

A spiked air filter was prepared (known activity 4.17 pCi/filter) to verify the methodology; results of the spike analysis were acceptable, 4.64 pCi/filter.

f Corrected result. An error in calculation was found.Included in the testing series as a "false positive".

Result of reanalysis, 0.04 +/- 0.01 Bq/L.Included in the testing series as a "false positive".

Result of reanalysis, 3.78 +/- 2.03 Bq/L.'The reason for the deviation is unknown. Result of the original sample recount: 0.47 +/- 0.07 Bq/L.The analysis was then repeated from the beginning.

Result of reanalysis:

0.51 +/- 0.07 Bq/L.'The lower result was due to a higher than average background count used in the calculation.

Average background result:, 4.11 +/-0.6 A6-3 TABLE A-7. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.Concentration (pCi/L)Lab Code b Date Analysis Laboratory ERA Control Result ' Result d Limits Acceptance STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143e STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143 STAP-1 143 03/24/08 03/24/08 03124/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 Am-241 Co-60 Cs-134 Cs-137 Fe-55 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Uranium Zn-65 60.48 +/- 3.52 650.72 +/- 3.00 467.50 +/- 5.53 1375.90 +/- 25.41 145.60 +/- 28.94 0.00 +/- 0.00 53.65 +/- 1.54 70.44 +/- 3.11 157.60 +/- 7.70 62.15 +/- 3.41 64.11 +/- 3.29 128.40 +/- 3.29 889.90 +/- 15.90 50.1 730.0 523.0 1450.0 241.0 0.0 46.8 64.1 152.0 66.7 66.2 136.0 872.0 29.3 -68.7 565.0 -912.0 341.0 -647.0 1090.0 -1900.0 106.0 -375.0 0.0 -10.0 32.1 -61.5 46.5 -83.0 66.9-236.0 42.0 -98.8 42.4 -94.0 69.5 -216.0 604.0 -1210.0 4.56 -13.2 56.80 -135.0 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass STAP-1 144 03/24/08 Gr. Alpha STAP-1 144 03/24/08 Gr. Beta 13.08 +/- 1.09 99.90 +/- 3.09 8.8 92.2 STSO1 145 STSO-1 145 STSO-1 145 STSO-1 145 STSO-1 145 STSO-1 145 STSO-1 145 STSO-1 145 STSO-1145e STSO-i 145 STSO-1 145 STSO-1 145 STSO-1 145 STSO-1 145'STSO-i 145 STSO-1 145 STSO-1 145 03/24/08 03/24/08 03/24/08 03124/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 Ac-228 Am-241 Bi-212 Bi-214 Co-60 Cs-134 Cs-137 K-40 Mn-54 Pb-212 Pb-214 Sr-90 Th-234 U-233/4 U-238 Uranium Zn-65 1269.02 +/- 36.81 1268.50 +/- 85.80 1407.10 +/- 56.64 2145.50 +/- 305.63 5219.70 +/- 90.30 5427.30 +/- 102.94 6346.60 +/- 201.80 11052.70 +/- 181.80 0.00 +/- 0.00 1198.20 +/- 96.58 2253.30 +/- 291.60 6407.00 +/- 277.00 2421.80 +/- 321.00 1227.93 +/- 91.52 1319.90 +/- 48.81 2592.00 +/- 140.50 2936.20 +/- 73.50 1180.0 1230.0 1360.0 1790.0 5130.0 5640.0 6010.0 11000.0 0.0 1080.0 2020.0 5360.0 2030.0 2050.0 2030.0 4180.0 2660.0 757.0 -1660.0 735.0 -1580.0 357.0 -2030.0 1100.0 -2570.0 3730.0 -6890.0 3630.0 -6790.0 4600.0 -7810.0 7980.0 -14900.0 0.0 -10.0 697.0 -1520.0 1210.0 -3010.0 1940.0 -8750.0 644.0 -3870.0 1240.0 -2580.0 1240.0 -2580.0 2380.0 -5640.0 2110.0 -3570.0 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass A7-1 TABLE A-7. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.Concentration (pCi/L)Lab Code b Date Analysis Laboratory ERA Control Result' Result d Limits Acceptance STVE-1 146 STVE-l 146 STVE-1 146 STVE-1 146 STVE-1 146 STVE-1 146 STVE-1146 e STVE-1146 STVE-1146 STVE-1146 STVE-1 146 STVE-1 146 STW-1 147 STW-1 147 STW-1 147 STW-1 147 STW-1 147 STW-1 147 e STW-1 147 STW-1 147 STW-1 147 STW-1 147 STW-1 147 STW-1147 STW-1 147 STW-1120 STW-1120 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08 03/24/08" 03/24/08 03/24/08 03/24/08 03/24/08 03/19/07 03/19/07 Am-241 Cm-244 Co-60 Cs-1 34 Cs-137 K-40 Mn-54 Sr-90 U-233/4 U-238 Uranium Zn-65 Am-241 Co-60 Cs- 134 Cs-137 Fe-55 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Uranium Zn-65 Uranium Zn-65 1261.50 +/- 73.90 1152.50 +/- 57.44 912.41 +/- 13.59 1547.70 +/- 38.81 1163.80 +/- 20.62 22186.00 +/- 339.40 0.00 +/- 0.00 3825.90 +/- 140.66 2753.30 +/- 227.90 2697.10 +/- 143.20 5586.10 +/- 455.20 1676.80 +/- 43.00 97.56 +/- 1.02 1430.00 +/- 33.33 730.18 +/- 33.39 1947.80 +/- 13.80 1422,70 +/- 172.16 0.00 +/- 0.00 144.16 +/- 4.54 82.16 +/- 2.50 512.03 +/- 43.37 74.40 +/- 1.20 75.10 +/- 1.35 152.10 -2.55 708.90 + 29.00 339.60 +/- 10.66 2009.00 +/- 36.40 1260.0 1200.0 888.0 1540.0 1100.0 24600.0 0.0 4130.0 3070.0 3050.0 6260.0 1430.0 90.9 1420.0 751.0 1990.0 2080.0 0.0 135.0 80.7 512.0 81.0 80.3 165.0 694.0 391.0 1910.0 718.0 -1730.0 591.0 -1870.0 600.0 -1280.0 882.0 -2130.0 807.0 -1530.0 17700.0 -34800.0 0.0 -10.0 2310.0 -5480.0 2110.0 -4070.0 2140.0 -3850.0 4300.0 -8080.0 1030.0 -1960.0 62.0 -124.0 1240.0 -1680.0 555.0 -862.0 1690.0 -2380.0 1210.0 -2780.0 0.0 -10.0 102.0 -168.0 62.4 -99.8 325.0 -684.0 61.0-104.0 61.3 -99.5 119.0 -220.0 588.0 -865.0 282.0 -521.0 1600.0 -2410.0 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).Laboratory codes as fotlows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

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

d Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.Included in the testing series as a "false positive".

No activity expected.The analysis was repeated by leaching and total dissolution methods. Total dissolution yielded results within expected range.Results of the reanalysis:

U-233,4, 1655 +/- 95 pCi/kg. U-238 1805 +/- 97 pCi/kg.A7-2 APPENDIX B DATA REPORTING CONVENTIONS B-1 Data Reoortina 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 = 2o 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 4.66a uncertainty for a background sample.3.0. Duplicate analyses 3.1 Individual results: For two analysis results; x 1 + s, and x 2 +/- s2 Reported result: x +/- s; where x = (1/2) (x 1 + x 2) and s = (1/2) +S2 3.2. Individual results: < L 1 , < L 2 Reported result: < L, where L = lower of Li and L2 3.3. Individual results: x +/- s, < L Reported result: x +/- s if x > L; < 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 x 1 , x 2 ...x are defined as follows: x -x 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-1 Table C-1. Maximum permissible concentrations of radioactivity in air and water above natural a background in unrestricted areas Air (pCi/m3)Water (pCi/L)Gross alpha Gross beta-3 1 x 10 1 Strontium-89 Strontium-90 Cesium-137 Barium-140 8,000 500 b -1 Iodine-131 2.8 x 10 Iodine-131 Potassium-40 Gross alpha Gross beta Tritium 1,000 8,000 1,000 4,000 2 10 6 lX 10 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 2008 was completed during September and October of 2008. 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 August 19th of 2008 for water use downstream of the DAEC to Cedar Rapids. This survey identified no new usages of river water from previous surveys. Irrigation of the strawberry farm in Palo and recreational fishing remain the only identified food pathway uses of Cedar River water between the DAEC and the City of Cedar Rapids eight miles down-river.

Significant flooding of the Cedar River in June of 2008 resulted in a noteworthy reduction in the number of gardens identified in this years census. It should also be noted that a large number of houses in Palo suffered major damage due to the flooding.

At the time of this census, an assumption was made that all houses would be reoccupied.

That assumption will be revisited during the 2009 census.There were 84 vegetable gardens identified during the performance of the 2008 Census. This number is less than the number of gardens found in the 2007 survey by 82. There were no changes to the location of the nearest vegetable receptor which is located in the sector towards the SW at 4318 Power Plant Road.There were no changes in the observed milk animal locations within the 3 mile radius of the plant in the past year. A number of farmers discontinued farming cattle and goats in 2008 in areas beyond 3 miles.The locations of the nearest residence for each sector remained the same as 2007. In 2008, only one new home was constructed within three miles of the DAEC, compared to 21 new homes identified in 2007 and 16 new homes in 2006.The new house was built 1.9 miles to the East-North-East.

D-2 Since the last performance of the land use census, there have been no new drinking water wells drilled within a two mile radius of the site. There were no other new land use or water use activities that could affect the Site Hydrogeological Conceptual Model In accordance with the DAEC's Environmental Sampling Procedure ESP 4.4,"Land Use Census", no changes in land use were identified that would adversely affect the safe operation of the DAEC, or that would warrant an update of the DAEC Updated Final Safety Analysis Report (UFSAR). Examples of land use that would warrant an UFSAR update include new hazards near the DAEC such as new gas pipelines or new installations utilizing toxic gases.FPL Energy Duane Arnold has committed to compliance with NEI 07-07, "Nuclear Energy Institute's Industry Ground Water Protection Initiative:

Per NEI 07-07, the following information is presented:

• Per Objectives 2.2 and 2.4, there were no on-site leaks or spills that warranted notification of state or local officials or other local stakeholders.

• No radioactive reactor by-product material was identified in samples taken by the DAEC's Radiological Environmental Monitoring Program (REMP)above the threshold concentration levels for reporting.

• Both on-site and off-site ground water sampling/monitoring has been incorporated into the REMP. Consequently, all Ground Water Protection Program results are included as part of the Annual Radiological Environmental Operating Report.D-3 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 dosimetry 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 2008 TLD results were evaluated with a paired difference statistical test.The evaluation concluded that there were no significant differences in the TLD populations for the 0.5 mile, 1 mile and 3 mile TLD populations.

2. As stated in Part 1 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 liquid and gaseous effluent releases was calculated using the Meteorological Information and Dose Assessment System (MIDAS) computer program in accordance with the ODAM. The calculation methods follow those prescribed by Regulatory Guide 1.109, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I".* 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.

E-2 0 Results of the MIDAS dose calculations are displayed below.1.) The hypothetical maximally exposed organ due to liquid effluents was the liver of a child, with an estimated dose equivalent of 0.0000323 mrem.2.) The whole body dose equivalent to the hypothetical maximally exposed individual due to liquid effluents was 0.0000323 mrem.3.) The maximum dose to air at the site boundary from noble gases released was 0.000496 mrad from gamma radiation at 936 meters towards the Northwest.

4.) The maximum dose to air at the site boundary from noble gases released was 0.000101 mrad beta radiation at 2416 meters towards the Northwest.

5.) The whole body dose equivalent to the hypothetical maximally exposed individual from noble gases was 0.000630 mrem, at 805 meters towards the West.6.) The skin dose equivalent to the hypothetical maximally exposed individual from noble gases was 0.000660 mrem, at 805 meters towards the West.7.) The hypothetical maximally exposed organ due to airborne iodines and particulates with half-lives greater than eight days was the thyroid of a child at 805 meters West, with an estimated dose equivalent of 0.0113 mrem.Conclusion:

No measurable dose due to the operation of the DAEC was detected by environmental TLDs in 2008. 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 2008 Type Age Distance Direction Dose or Dose Annual 10 CFR 50, I Group (meters) Equivalent (mrem) Appendix I Limit Direct Radiation None (as measured by TLDs) None Liquid Releases Whole Body Dose Child S 0.0000323 mrem 3 mrem Organ Dose Cilr- S 0.0000323 mrem 10 mrem Organ_____Dose

____Liver Noble Gas Gamma Air Dose 936 NW 0.000496 mrad 10 mrad Beta Air Dose 2416 NW 0.000101 mrad 20 mrad Whole Body All 805 W 0.000630 mrem 5 mrem Skin All 805 W 0.000660 mrem 15 mrem Particulates

& lodines Organ Dose Child -805 W 0.0113 mrem 15 mrem Thyroid I___________________I_________

• There is no Appendix I limit for direct radiation.

It is listed here to demonstrate compliance with 40 CFR 190 limits of 25 mrem whole body and 75 mrem thyroid.E-3

-- Environmental, Inc.Midwest Laboratory an Allegheny Technologies Co.700 Landwehr Road : Northbrook, IL 60062-2310 ph. (847) 564-0700

• fax (847) 564-4S17 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, 2008 Prepared by ENVIRONMENTAL, Inc.Midwest Laboratory Project No. 8001 Reviewed and Approved La o tor anager TABLE OF CONTENTS Section Page List of Tables ...............................................................................................................

iii 1.0 INTRO DUCTIO N ......................................................................................................

v 2.0 LISTING O F M ISSED SAM PLES .............................................................................

vi 3.0 DATA TABLES ............................................................................................................

vii Appendices A Supplem ental Analyses .......................................................................................

A-1 ii LIST OF TABLES No. Title PaQe 1 Airborne particulates collected at Location D-3 (Hiawatha), analysis for gross beta 1-1 2 Airborne particulates and iodine collected at Location D-5 (Palo), analysis for gross beta and iodine-131 2-1 3 Airborne particulates collected at Location D-6 (Center Point), analysis for gross beta 3-1 4 Airborne particulates and iodine collected at Location D-7, (Shellsburg), analysis for gross beta and iodine-1 31 4-1 5 Airborne particulates and iodine collected at Location D-1 1 (Toddsville), analysis for gross beta and iodine-1 31 5-1 6 Airborne particulates collected at Location D-13 (Alburnett), analysis for gross beta ...........................................

6-1 7 Airborne particulates and iodine collected at Location D-15 (on-site, north), analysis for gross beta and iodine-1 31 ............................................................

7-1 8 Airborne particulates collected at Location D-16 (on-site, south), analysis for g ro ss b e ta ........................................................................................................

8 -1 9 Airborne particulate samples, quarterly composites of weekly samples, analysis for gam m a-em itting isotopes ........ ; ...................................................

9-1 10 Ambient gamma radiation (TLD), quarterly exposure ..........................

10-1 11 Milk samples, analysis for iodine-131 and gamma emitting isotopes .........................

11-1 12 Ground water, analysis for gross beta and tritium 12.1 Well water (potable), analysis for gross beta and tritium .....................................

12-1 12.2 On-site monitoring wells, analysis for gross beta and tritium ...............................

12-2 13 Vegetation samples (broadleaf), analysis for iodine-131 and gamma-e m itting isoto pes ............................................................................................

13-1 14 Vegetation samples (hay and grain), analysis for gamma-emitting isotopes .............

14-1 15 Surface water samples, analysis for tritium and gamma-emitting isotopes ..............

15-1 16 Surface water samples, quarterly composites of monthly samples, analysis for strontium

-89 and strontium

-90 .................................................................

16-1 iii LIST OF TABLES (continued) 17 Fish samples, analysis for gamma-emitting isotopes ................................................

17-1 18 River sediment samples, analysis for gamma-emitting isotopes ...............................

18-1 19 Precipitation samples, analysis for gamma-emitting isotopes ....................................

19-1 20 Precipitation samples, quarterly composites of monthly samples, analysis for tritiu m ..............................................................................................................

2 0 -1 21 Soil samples, analysis for strontium-90 and gamma-emitting isotopes ......................

21-1 In addition, the following tables are in the Appendices:

Appendix A A-1 Supplemental Analyses ......................................................................................

A-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 2007. 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.All concentrations, except gross beta and airborne iodine, are decay corrected to the time of collection.

Airborne 1-131 is decayed to the midpoint of the collection period.The gamma isotopic analysis provides a spectrum with an energy range of 80 to 2048 keV.Specific isotopes included are Mn-54, Fe-59, Co-58, Co-60, Zn-65, Zr-95, Nb-95, Ru-103, Ru-106, 1-131, Ba-La-140, Cs-134, Cs-137, Ce-141, and Ce-144. Naturally occurring gamma-emitters, such as K-40 and Ra daughters, are frequently detected but may not be listed.V 2.0 LISTING OF MISSED SAMPLES Sample Collection Date Type Analysis Location(s) or Period Comments AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP / Al Gross Beta, 1-131 AP/ Al Gross Beta, 1-131 AP/Al Gross Beta, 1-131 AP/Al Gross Beta, 1-131 TLD Ambient Gamma TLD Ambient Gamma TLD Ambient Gamma TLD Ambient Gamma G Gamma G Gamma D-1 5 D-16 D-15 D-16 D-5 D-5 D-16 D-16 D-16 D-7 D-3 D-5 D-5 D-6 D-10 D-18, D-21 D-19, D-82 D-18, D-19 D-36 D-117 D-94, D-96 02-07-08 Not accessible due to heavy snows 02-14-08 Not accessible due to heavy snows 06-19-08 06-26-08 06-19-08 06-26-08 07-03-08 07-23-08 07-31-08 08-07-08 08-14-08 08-28-08 2nd Qtr, 2008 2nd Qtr, 2008 3rd Qtr, 2008 3rd Qtr, 2008 July, 2008 October, 2008 Not collected due to severe flooding.Partial sample (74 M 3) due to power loss.Not collected due to severe flooding.No power to the sampler station.Partial sample (156 M 3).Partial sample (62 M 3) due to power loss.Partial sample (62 M 3) due to power loss.Partial sample (186 M 3) due to power loss.TLD lost due to vandalism.

TLDs lost in the floods.TLDs not installed due to flooding.TLD lost in the field.No strawberries available.

No crops available.

In no instance did missed analyses affect minimum sampling requirements as specified in the ODAM.vi 3.0 DATA TABLES vii DUANE ARNOLD Table 1. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location:

D-3 (Hiawatha)

Units: pCi/m 3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (m") Gross Beta Collected (mI) Gross Beta Required LLD 01-10-08 01-17-08 01-24-08 01-31-08 02-07-08 02-14-08 02-21-08 02-28-08 03-06-08 03-13-08 03-20-08 03-27-08 04-03-08 290 288 290 291 290 290 293 290 290 288 288 281 285 0.010 0.039 +/- 0.004 0.052 +/- 0.005 0.037 +/- 0.004 0.047 +/- 0.004 0.022 +/- 0.004 0.046 +/- 0.005 0.032 +/- 0.004 0.023 +/- 0.004 o.29 +/- 0.004 0.037 +/- 0.004 0.020 +/- 0.004 0.025 +/- 0.004 0.019 +/- 0.004 Required LLD 0.010 07-10-08 07-17-08 07-23-08 07-31-08 08-07-08 08-14-08 08-21-08 08-28-08 09-04-08 09-11-08 09-18-08 09-25-08 10-02-08 308 281 242 156 280 284 283 282 281 284 282 283 281 0.016 +/- 0.003 0.030 +/- 0.004 0.024 +/- 0.004 0.022 +/- 0.005 0.033 +/- 0.004 0.021 +/- 0.003 0.035 +/- 0.004 0.025 +/- 0.003 0.032 +/- 0.004 0.030 +/- 0.004 0.025 +/- 0.003 0.045 +/- 0.004 0.046 +/- 0.004 1st Quarter Mean +/- s.d.0.033 +/- 0.011 3rd Quarter Mean +/- s.d.0.029 +/- 0.009 04-10-08 04-17-08 04-24-08 05-01-08 05-08-08 05-14-08 05-22-08 05-29-08 06-05-08 06-11-08 06-19-08 06-26-08 07-03-08 286 308 308 301 305 262 352 305 304 251 341 307 304 0.026 +/- 0.004 0.019 +/- 0.003 0.024 +/- 0.004 0.028 +/- 0.004 0.024 +/- 0.004'0.018 +/- 0.004 0.015 +/- 0.003 0.015 +/- 0.003 0.025 +/- 0.004 0.015 +/- 0.004 0.015 +/- 0.003, 0.017 +/- 0.003 0.020 +/- 0.004 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31-08 292 291 291 254 289 294 292 254 310 275 236 231 310 0.033 +/- 0.004 0.027 +/- 0.003 0.028 +/- 0.003 0.031 +/- 0.004 0.053 +/- 0.005 0.016 +/- 0.003 0.030 +/- 0.004 0.037 +/- 0.004 0.031 +/- 0.004 0.031 +/- 0.004 0.042 +/- 0.005 0.012 +/- 0.003 0.013 + 0.003 0.030 + 0.011 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 4th Quarter Mean +/- s.d.Cumulative Average Previous Annual Average 0.028 0.031 a lodine-131 concentrations are < 0.03 pCi/mi 3 unless noted otherwise.

b No explanation given for low volume.1-1 DUANE ARNOLD Table 2. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131'.

Location:

D-5 (Palo)Units: pCi/m 3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (m') Gross Beta Collected (ms) Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-08 284 01-17-08 287 01-24-08 284 01-31-08 286 0.047 +/- 0.004 0.059 +/- 0.005 0.042 +/- 0.005 0.057 +/- 0.005 07-10-08 288 07-17-08 283 07-23-08 245 07-31-08 327 0.022 +/- 0.004 0.028 +/- 0.004 0.022 +/- 0.004 0.026 +/- 0.003 02-07-08 284 0.021 +/- 0.004 02-14-08 285 0.040 +/- 0.005 02-21-08 287 0.036 +/- 0.004 02-28-08 285 0.029 +/- 0.004 08-07-08 62 d 0.022 +/- 0.011 08-14-08 62 d 0.026 +/- 0.011 08-21-08 285 0.039 +/- 0.004 08-28-08 300 0.025 +/- 0.003 03-06-08 284 03-13-08 286 03-20-08 288 03-27-08 280 04-03-08 286 0.024 +/- 0.004 0.035 +/- 0.004 0.019 +/- 0.004 0.020 +/- 0.004 0.012 +/- 0.003 09-04-08 09-11-08 09-18-08 09-25-08 10-02-08 300 300 301 299 300 0.031 +/- 0.004 0.024 +/- 0.003 0.021 +/- 0.003 0.041 +/- 0.004 0.041 +/- 0.004 1st Quarter Mean +/- s.d. 0.034 +/- 0.015 3rd Quarter Mean +/- s.d. 0.028 +/- 0.007 04-10-08 04-17-08 04-24-08 05-01-08 05-08-08 05-14-08 05-22-08 05-29-08 06-05-08 06-11-08 06-19-08 06-26-08 07-03-08 286 285 286 284 284 244 328 285 0.022 +/- 0.004 0.017 +/- 0.003 0.023 +/- 0.004 0.026 +/- 0.004 0.026 +/- 0.004 0.021 +/- 0.004 0.016 +/- 0.003 0.013 +/- 0.003 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31-08 300 299 299 302 298 302 302 260 344 304 264 255 345 0.033 +/- 0.004 0.021 +/- 0.003 0.023 +/- 0.003 0.023 +/- 0.003 0.047 +/- 0.004 0.014 +/- 0.003 0.029 +/- 0.003 0.030 +/- 0.004 0.031 +/- 0.003 0.024 +/- 0.003 0.046 +/- 0.004 0.015 +/- 0.003 0.041 +/- 0.004 283 0.027 +/- 0.004 243 0.013 +/- 0.004 NDb 74 C 0.024 +/- 0.011 285 0.020 +/- 0.004 2nd Quarter Mean +/- s.d. 0.021 +/- 0.005 4th Quarter Mean +/- s.d. 0.029 +/- 0.011 Cumulative Average Previous Annual Average 0.028 0.032 8 Iodine-131 concentrations are < 0.03 pCi/mr 3 unless noted otherwise.

b "ND' = No data; see Table 2.0, Listing of Missed Samples.c Low volume; electric off due to flooding.

1-131 results, < 0.072 pCiIm 3.d Electric off.2-1 DUANE ARNOLD Table 3. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location:

D-6 (Center Point)Units: pCi/m3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (m") Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-08 01-17-08 01-24-08 01-31-08 02-07-08 02-14-08 02-21-08 02-28-08 03-06-08 03-13-08 03-20-08 03-27-08 04-03-08 276 278 276 277 278 276 279 297 295 286 288 292 297 0.046 +/- 0.004 0.060 +/- 0.005 0.055 +/- 0.005 0.056 +/- 0.005 0.028 +/- 0.004 0.053 +/- 0.005 0.039 +/- 0.005 0.030 +/- 0.004 0.035 +/- 0.004 0.039 +/- 0.004 0.020 +/- 0.004.0.018 +/- 0.004 0.017 +/- 0.003 0.038 +/- 0.015 0.020 +/- 0.003 0,014 +/- 0.003 0.017 +/- 0.003 0.023 +/- 0.004 0.020 +/- 0.004 0.019 +/- 0.004 0.014 +/- 0.003 0.013 +/- 0.003 07-10-08 07-17-08 07-23-08 07-31-08 08-07-08 08-14-08 08-21-08 08-28-08 09-04-08 09-11-08 09-18-08 09-25-08 10-02-08 288 283 245 327 284 287 285 186 287 288 289 287 287 0.019 +/- 0.003 0.023 +/- 0.004 0.020 +/- 0.004 0.026 +/- 0.003 0.031 +/- 0.004 0.020 +/- 0.003 0.038 +/- 0.004 0.036 +/- 0.005 0.030 +/- 0.004 0.023 +/- 0.003 0.022 +/- 0.003 0.040 +/- 0.004 0,038 +/- 0.004 0.028 +/- 0.008 1st Quarter Mean +/- s.d.3rd Quarter Mean +/- s.d.04-10-08 04-17-08 04-24-08 05-01-08 05-08-08 05-14-08 05-22-08 05-29-08 06-05-08 06-11-08 06-19-08 06-26-08 07-03-08 298 298 297 296 296 254 342 296 283 251 318 287 283 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31-08 289 286 281 284 287 289 291 251 331 292 254 246 331 0.033 0.013 0.026 0.027+/- 0.004+/- 0.003+/- 0.003+/- 0.003 0.048 +/- 0.004 0.016 +/- 0.003 0.028 +/- 0.004 0.033 +/- 0.004 0.031 +/- 0.003 0.033 +/- 0.004 0.043 +/- 0.004 0.049 +/- 0.005 0.064 +/- 0.004 0.027 0.013 0.016 0.020 0.018+/- 0.004+/- 0.004+/- 0.003+/- 0.004+/- 0.004 2nd Quarter Mean +/- s.d.0.018 +/- 0.004 4th Quarter Mean +/- s.d. 0.034 +/- 0.014 Cumulative Average Previous Annual Averaqe 0.030 0.032 a lodine-131 concentrations are < 0.03 pCi/mi 3 unless noted otherwise.

b Electric off.3-1 DUANE ARNOLD Table 4. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location:

D-7 (Shellsburg)

Units: pCi/m 3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-08 282 0.043 t 0.004 01-17-08 284 0.047 t 0.005 01-24-08 282 0.046 +/- 0.005 01-31-08 282 0.048 +/- 0.004 02-07-08 282 0.024 +/- 0.004 02-14-08 273 0.052 +/- 0.005 02-21-08 290 0.034 +/- 0.004 02-28-08 288 0.032 +/- 0.004 03-06-08 287 0.033 +/- 0.004 03-13-08 286 0.034 +/- 0.004 03-20-08 288 0.017 +/- 0.003 03-27-08 283 0.017 +/- 0.004 04-03-08 282 0.019 0.004 1st Quarter Mean +/- s.d. 0.034 + 0.012 04-10-08 289 0.022 +/- 0.004 04-17-08 300 0.015 +/- 0.003 04-24-08 300 0.022 +/- 0.004 05-01-08 299 0.027 +/- 0.004 05-08-08 298 0.020 +/- 0.004 05-14-08 257 0.013 +/- 0.004 05-22-08 345 0.013 +/- 0.003 05-29-08 300 0.014 +/- 0.003 06-05-08 298 0.019 +/- 0.004 06-11-08 245 0.014 +/- 0.004 06-19-08 334 0.015 +/- 0.003 06-26-08 301 0.019 +/- 0.003 07-03-08 298 0.014 +/- 0.003 2nd Quarter Mean +/- s.d. 0.017 +/- 0.004 07-10-08 07-17-08 07-23-08 07-31-08 08-07-08 08-14-08 08-21-08 08-28-08 09-04-08 09-11-08 09-18-08 09-25-08 10-02-08 285 0.021 +/- 0.004 281 0.028 +/- 0.004 N Db 343 0.025 +/- 0.003 282 284 282 284 281 283 284 282 283 0.036 +/- 0.004 0.028 +/- 0.004 0.038 +/- 0.004 0.010 +/- 0.003 0.035 +/- 0.004 0.023 +/- 0.003 0.023 +/- 0.003 0.038 +/- 0.004 0.036 +/- 0.004 3rd Quarter Mean +/- s.d. 0.028 +/- 0.008 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31 -08 283 285 285 285 284 288 285 246 312 258 239 231 312 0.032 +/- 0.004 0.020 +/- 0.003 0.028 +/- 0.004 0.025 +/- 0.003 0.023 +/- 0.003 0.015 +/- 0.003 0.025 +/- 0.003 0.028 +/- 0.004 0.031 +/- 0.003 0.035 +/- 0.004 0.042 +/- 0.005 0.049 +/- 0.005 0.058 +/- 0.004 4th Quarter Mean +/- s.d. 0.032 +/- 0.012 Cumulative Average Previous Annual Averaqe 0.028 0.030 a Iodine-131 concentrations are < 0.03 pCi/m 3 unless noted otherwise.

b,,ND, = No data; see Table 2.0, Listing of Missed Samples.4-1 DUANE ARNOLD Table 5. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location:

D-11 (Toddville)

Units: pCi/mr 3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (M 3) Gross Beta Collected (M 3) Gross Beta Required LLD 0.010 01-10-08 01-17-08 01-24-08 01-31-08 286 286 285 286 0.044 +/- 0.004 0.056 +/- 0.005 0.047 +/- 0.005 0.051 +/- 0.005 Required LLD 07-10-08 289 07-17-08 281 07-23-08 243 07-31-08 334 02-07-08 285 0.025 +/- 0.004 02-14-08 284 0.051 +/- 0.005 02-21-08 288 0.045 +/- 0.005 02-28-08 285 0.034 +/- 0.004 03-06-08 284 0.032 +/- 0.004 03-13-08 286 0.039 +/- 0.005 03-20-08 288 0.019 +/- 0.004 03-27-08 286 0.022 +/- 0.004 04-03-08 294 0.017 +/- 0.003 1st Quarter Mean +/- s.d. 0.037 +/- 0.013 04-10-08 292 0.022 +/- 0.004 04-17-08 292 0.017 +/- 0.003 04-24-08 292 0.020 +/- 0.004 05-01-08 290 0.024 +/- 0.004 05-08-08 290 0.018 +/- 0.004 05-14-08 248 0.016 +/- 0.004 05-22-08 334 0.016 +/- 0.003 05-29-08 290 0.013 +/- 0.003 06-05-08 284 0.021 +/- 0.004 06-11-08 251 0.014 +/- 0.004 06-19-08 326 0.013 +/- 0.003 06-26-08 293 0.018 +/- 0.003 07-03-08 288 0.014 +/- 0.003 2nd Quarter Mean +/- s.d. 0.017 +/- 0.004 08-07-08 08-14-08 08-21-08 08-28-08 09-04-08 09-11-08 09-18-08 09-25-08 10-02-08 282 293 283 253 290 292 291 292 290 0.010 0.018 +/- 0.003 0.030 +/- 0.004 0.024 +/- 0.004 0.025 +/- 0.003 0.027 +/- 0.004 0.021 +/- 0.003 0.039 +/- 0.004 0.021 +/- 0.003 0.029 +/- 0.003 0.022 +/- 0.003 0.020 +/- 0.003 0.038 +/- 0.004 0.035 +/- 0.004 3rd Quarter Mean +/- s.d. 0.027 +/- 0.007 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31-08 289 288 291 290 286 291 290 246 328 291 249 244 328 0.029 +/- 0.004 0.025 +/- 0.003 0.022 +0.003 0.028 +/- 0.003 0.051 +/- 0.004 0.017 +/- 0.003 0.033 +/- 0.004 0.036 +/- 0.004 0.035 +/- 0.004 0.034 +/- 0.004 0.045 +/- 0.005 0.049 +/- 0.005 0.061 +/- 0.004 4th Quarter Mean +/- s.d. 0.036 +/- 0.013 Cumulative Average Previous Annual Average 0.029 0.031 a lodine-131 concentrations are < 0.03 pCi/mi 3 unless noted otherwise.

5-1 DUANE ARNOLD Table 6. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location:

D-13 (Alburnett)

Units: pCi/m 3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (M 3) Gross Beta Collected (M 3) Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-08 01-17-08 01-24-08 01-31-08 02-07-08 02-14-08 02-21-08 02-28-08 276 278 276 277 276 276 279 277 0.046 +/- 0.004 0.057 +/- 0.005 0.054 +/- 0.005 0.052 +/- 0.005 0.026 +/- 0.004 0.049 +/- 0.005 0.035 +/- 0.005 0.028 +/- 0.004 0.032 +/- 0.004 0.044 +/- 0.005 0.017 +/- 0.003 0.016 +/- 0.004 0.019 +/- 0.004 07-10-08 288 0.018 +/- 0.003 07-17-08 284 0.022 +/- 0.004 07-23-08 245 0.022 +/- 0.004 07-31-08 327 0.024 +/- 0.003 08-07-08 284 08-14-08 287 08-21-08 285 08-28-08 269 09-04-08 268 09-11-08 273 09-18-08 271 09-25-08 263 10-02-08 269 0.025 +/- 0.003 0.022 +/- 0.003 0.030 +/- 0.004 0.026 +/- 0.004 0.033 +/- 0.004 0.023 +/- 0.003 0.023 +/- 0.003 0.043 +/- 0.005 0.040 +/- 0.004 03-06-08 275 03-13-08 286 03-20-08 288 03-27-08 286 04-03-08 278 1st Quarter Mean +/- s.d. 0.036 +/- 0.015 3rd Quarter Mean +/- s.d. 0.027 +/- 0.007 04-10-08 286 04-17-08 286 04-24-08 286 05-01-08 285 0.026 +/- 0.004 0.018 +/- 0.003 0.029 +/- 0.004 0.026 +/- 0.004 10-09-08 267 10-16-08 266 10-23-08 270 10-30-08 273 0.035 +/- 0.004 0.026 +/- 0.004 0.024 +/- 0.003 0.026 +/- 0.004 05-08-08 284 0.025 +/- 0.004 05-14-08 245 0.019 +/- 0.004 05-22-08 328 0.016 +/- 0.003 05-29-08 285 0.013 +/- 0.003 06-05-08 284 06-11-08 250 06-19-08 318 06-26-08 286 07-03-08 284 0.022 +/- 0.004 0.014 +/- 0.004 0.015 +/- 0.003 0.019 +/- 0.004 0.018 +/- 0.004 11-06-08 254 0.048 +/- 0.005 11-13-08 274 0.016 +/- 0.003 11-20-08 285 0.029 +/- 0.004 11-26-08 246 0.029 +/- 0.004 12-04-08 325 0.026 +/- 0.003 12-11-08 286 0.031 +/- 0.004 12-17-08 249 0.043 +/- 0.005 12-23-08 241 0.046 +/- 0.005 12-31-08 325 0.056 +/- 0.004 4th Quarter Mean +/- s.d. 0.034 +/- 0.011 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 Cumulative Average Previous Annual Average 0.029 0.031 a lodine-131 concentrations are < 0.03 pCi/mi 3 unless noted otherwise.

6-1 DUANE ARNOLD Table 7. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-13Ia.

Location:

D-15 (On-site)Units: pCi/m 3 Collection:

Continuous, weekly exchange.Date Volume Date Volume Collected (M 3) Gross Beta Collected (M 3) Gross Beta Required LLD 0.010 Required LLD 01-10-08 01-17-08 01-24-08 01-31-08 02-07-08 02-14-08 02-21-08 02-28-08 03-06-08 03-13-08 03-20-08 03-27-08 04-03-08 279 281 279 280 303 280 272 286 284 273 275 0.043 +/- 0.004 0.063 +/- 0.005 0.052 +/- 0.005 0.054 +/- 0.005 NDb NDb 0.036 +/- 0.004 0.023 +/- 0.004 0.032 +/- 0.004 0.033 +/- 0.004 0.015 +/- 0.003 0.018 +/- 0.004 0.020 +/- 0.004 0.035 +/- 0.016 07-10-08 07-17-08 07-23-08 07-31-08 08-07-08 08-14-08 08-21-08 08-28-08 09-04-08 09-11-08 09-18-08 09-25-08 10-02-08 286 281 243 323 282 284 282 288 288 288 290 287 289 0.010 0.022 +/- 0.004 0.026 +/- 0.004 0.022 +/- 0.004 0.026 +/- 0.003 0.029 +/- 0.004 0.024 +/- 0.003 0.034 +/- 0.004 0.023 +/- 0.003 0.033 +/- 0.004 0.025 +/- 0.003 0.024 +/- 0.003 0.040 +/- 0.004 0.047 +/- 0.004 1st Quarter Mean +/- s.d.3rd Quarter Mean +/- s.d. 0.029 +/- 0.008 04-10-08 04-17-08 04-24-08 05-01-08 05-08-08 05-14-08 05-22-08 05-29-08 06-05-08 06-11-08 06-19-08 06-26-08 07-03-08 275 275 280 273 273 235 315 274 281 246 320 277 282 0.026 +/- 0.004 0.018 +/- 0.004 0.024 +/- 0.004 0.027 +/- 0.004 0.025 +/- 0.004 0.019 +/- 0.004 0.016 +/- 0.003 0,014 +/- 0.003 0.026 +/- 0.004 0.013 +/- 0.004 0.016 +/- 0.003 0.017 +/- 0.004 0.019 +/- 0.004 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31-08 288 288 282 290 284 291 288 249 328 289 251 243 328 0.036 +/- 0.004 0.024 +/- 0.003 0.027 +/- 0.004 0.028 +/- 0.003 0.055 +/- 0.005 0.015 +/- 0.003 0.027 +/- 0.004 0.037 +/- 0.004 0.039 +/- 0.004 0.035 +/- 0.004 0.046 +/- 0.005 0.050 +/- 0.005 0.064 +/- 0.004 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 4th Quarter Mean +/- s.d. 0.037 +/- 0.014 Cumulative Average Previous Annual Average 0.030 0.032 r a Iodine-131 concentrations are < 0.03 pCi/mi 3 unless noted otherwise.

b "ND" = No data; see Table 2.0, Listing of Missed Samples.7-1 DUANE ARNOLD Table 8. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location:

D-16 (On-site)Units: pCi/m3 Collection:

Continuous, weekly exchange.Date Volume Collected (M 3)Required LLD Gross Beta 0.010 Date Volume Collected (m 3)Required LLD Gross Beta 0.010 01-10-08 279 0.048 +/- 0.004 01-17-08 281 0.053 +/- 0.005 01-24-08 279 0.060 +/- 0.005 01-31-08 280 0.048 +/- 0.004 07-10-08 306 0.016 +/- 0.003 07-17-08 281 0.029 +/- 0.004 07-23-08 243 0.023 +/- 0.004 07-31-08 346 0.024 +/- 0.003 02-07-08 02-14-08 02-21-08 02-28-08 NDb NDb 317 0.044 +/- 0.004 286 0.032 +/- 0.004 08-07-08 282 08-14-08 284 08-21-08 282 08-28-08 282 0.036 +/- 0.004 0.022 +/- 0.003 0.024 +/- 0.004 0.024 +/- 0.003 03-06-08 284 0.034 +/- 0.004 03-13-08 285 0.051 +/- 0.005 03-20-08 285 0.024 +/- 0.004 03-27-08 284 0.022 +/- 0.004 04-03-08 286 0.021 +/- 0.004 1st Quarter Mean +/- s.d. 0.040 +/- 0.014 09-04-08 282 0.035 +/- 0.004 09-11-08 283 0.034 +/- 0.004 09-18-08 283 0.023 +/- 0.003 09-25-08 281 0.046 +/- 0.004 10-02-08 276 0.045 +/- 0.004 3rd Quarter Mean +/- s.d. 0.029 +/- 0.009 04-10-08 04-17-08 04-24-08 05-01-08 05-08-08 05-14-08 05-22-08 05-29-08 06-05-08 06-11-08 06-19-08 06-26-08 07-03-08 286 286 304 302 302 258 347 300 0.023 +/- 0.004 0.018 +/- 0.003 0.020 +/- 0.004 0.024 +/- 0.004 0.021 +/- 0.004 0.015 +/- 0.004 0.013 +/- 0.003 0.012 +/- 0.003 10-09-08 10-16-08 10-23-08 10-30-08 11-06-08 11-13-08 11-20-08 11-26-08 12-04-08 12-11-08 12-17-08 12-23-08 12-31-08 282 294 294 296 293 298 294 252 335 295 256 248 335 0.036 +/- 0.004 0.027 +/- 0.003 0.029 +/- 0.004 0.031 +/- 0.004 0.053 +/- 0.004 0.016 +/- 0.003 0.034 +/- 0.004 0.034 +/- 0.004 0.033 +/- 0.003 0.036 +/- 0.004 0.044 +/- 0.004 0.052 +/- 0.005 0.049 +/- 0.004 301 0.022 +/- 0.004 215 0.011 +/- 0.004 NDb NDb NDb 2nd Quarter Mean +/- s.d. 0.018 +/- 0.005 4th Quarter Mean +/- s.d. 0.037 +/- 0.011 Cumulative Average 0.031 Previous Annual Average 0.032 2 Iodine-131 concentrations are < 0.03 pCi/mi 3 unless noted otherwise.

",ND, = No data; see Table 2.0, Listing of Missed Samples.8-1 DUANE ARNOLD Table 9. Airborne particulates, analyses for gamma-emitting isotopes.Collection:

Quarterly Composite Units: pCi/m6 Location Quarter Lab Code Volume (m')Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 D-3 1st Quarter DAP- 1748 3755 0.063 +/- 0.014< 0.0007< 0.0011< 0.0004< 0.0006< 0.0003< 0.0014< 0.0007< 0.0024< 0.0006< 0.0005< 0.0014< 0.0037 2nd Quarter DAP- 3681 3933 0.118 +/- 0.017< 0.0007< 0.0016 0.0003< 0.0006< 0.0007< 0.0010* 0.0005< 0.0052< 0.0004< 0.0004< 0.0009< 0.0043 3rd Quarter DAP- 5935 3527 0.078 +/- 0.016< 0.0009< 0.0016< 0.0008< 0.0008< 0.0010< 0.0008< 0.0011< 0.0082< 0.0007< 0.0008< 0.0018< 0.0035 4th Quarter DAP- 7514 3619 0.061 +/- 0.016< 0.0006< 0.0019< 0.0010< 0.0008< 0.0015< 0.0007< 0.0007< 0.0070< 0.0005* 0.0007< 0.0010< 0.0043 Location D-5 Lab Code Volume (m")Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-1 06 Cs- 134 Cs-137 Ce-141 Ce-144 DAP- 1749 3708 0.066 -0.016 0.0008 0.0010 0.0005 0.0006 0.0007 0.0020 0.0009 0.0038 0.0005 0.0005 0.0013 0.0044 DAP- 3682 3170 0.089 +/- 0.019< 0.0008< 0.0021< 0.0005< 0.0010< 0.0008< 0.0008< 0.0005< 0.0078< 0.0008< 0.0005< 0.0024< 0.0054 DAP- 5936 3352 0.109 +/- 0.022< 0.0005< 0.0017< 0.0014< 0.0010< 0.0018< 0.0023< 0.0013< 0.0059< 0.0006< 0.0014< 0.0015< 0.0040 DAP- 7515 3875 0.049 +/- 0.012< 0.0005< 0.0018* 0.0010< 0.0008< 0.0007< 0.0018< 0.0011< 0.0060< 0.0006< 0.0007< 0.0012< 0.0041 Location D-6 Lab Code Volume (m")Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs- 137 Ce-141 Ce-144 DAP- 1750 3695 0.077 +/- 0,016< 0.0006< 0.0010< 0.0007< 0,0008< 0.0006< 0.0006< 0.0008< 0.0027< 0.0004< 0.0005< 0.0012< 0.0035 DAP- 3683 3800 0.086 +/- 0.016< 0.0006< 0.0015< 0.0004< 0.0006< 0.0005< 0.0013< 0.0007< 0.0057< 0.0007< 0.0009< 0.0012< 0.0044 DAP- 5937 3625 DAP- 7516 3710 0.085 +/-0.017 0.0008 0.0025 0.0009 0.0009 0.0011 0.0009 0.0014 0.0059 0.0008 0.0010 0.0018 0.0057 0.085 +/- 0.017< 0.0006< 0.0019< 0.0005* 0.0008< 0.0007* 0.0012* 0.0011* 0.0064* 0.0005* 0.0006* 0,0013< 0.0044 9-1 DUANE ARNOLD Table 9. Airborne particulates, analyses for gamma-emitting isotopes.Collection:

Quarterly Composite Units: pCi/me Location D-7 Quarter Lab Code Volume (m")Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs'137 Ce-141 Ce-144 1st Quarter DAP- 1751 3690 2nd Quarter DAP- 3684 3864 0.075 +0.013 0.0008 0.0011 0.0003 0.0006 0.0007 0.0007 0.0007 0.0040 0.0007 0.0008 0.0015 0.0029 0.087 +0.018 0.0005 0.0014 0.0003 0.0010 0.0005 0.0016 0.0009 0.0056 0.0004 0.0006 0.0010 0.0050 3rd Quarter DAP- 5938 3452 0.108 +/- 0.019< 0.0008< 0.0024< 0.0009< 0.0012< 0.0019< 0.0022< 0.0013< 0.0083< 0.0010< 0.0011< 0.0016< 0.0041 4th Quarter DAP- 7517 3592 0.069 +/- 0.015< 0.0004< 0.0019< 0.0010< 0.0008< 0.0012< 0.0008< 0.0012< 0.0069< 0.0007< 0.0006< 0.0009< 0.0041 Location D-11 Lab Code Volume (m')Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-1 34 Cs-1 37 Ce-141 Ce-144 DAP- 1752 3721 0.067 +/- 0.013< 0.0008< 0.0010< 0.0007< 0.0006< 0.0005< 0.0009< 0.0008< 0.0055< 0.0006< 0.0006< 0.0008< 0.0040 DAP- 3685 3772 0.093 +/- 0.019< 0.0006< 0.0015< 0.0003< 0.0007< 0.0006< 0.0017< 0.0006< 0.0050< 0.0007< 0.0004< 0.0016< 0.0042 DAP- 5939 3712 0.094 +/- 0.018< 0.0007< 0.0035< 0.0012< 0.0010< 0.0018< 0.0020< 0.0012< 0.0076< 0.0008< 0.0010< 0.0016< 0.0036 DAP- 7518 3711 0.063 +/-0.012 0.0008 0.0020 0.0007 0.0007 0.0006 0.0012 0.0008 0.0079 0.0004 0.0006 0.0017 0.0038 Location D-1 3 Lab Code Volume (mi 3)Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 DAP- 1753 3629 0.060 +/-0.016 0.0008 0.0011 0.0006 0.0006 0.0004 0.0011 0.0007 0.0043 0.0006 0.0005 0.0008 0.0030 DAP- 3686 3707 0.094 +/- 0.017< 0.0007< 0.0015* 0.0006< 0.0011< 0.0005< 0.0014< 0.0004< 0.0065< 0.0008< 0.0003* 0.0014< 0.0045 DAP- 5940 3614 0.092 +/- 0.018< 0.0008< 0.0021< 0.0007< 0.0009< 0.0012< 0.0020< 0.0014< 0.0071< 0.0010< 0.0009< 0.0013< 0.0045 DAP- 7519 3561 0.067 +/- 0.014< 0.0003< 0.0020< 0.0006< 0.0010< 0.0010< 0.0009< 0.0011< 0.0072< 0.0005< 0.0007< 0.0013< 0.0051 9-2 DUANE ARNOLD Table 9. Airborne particulates, analyses for gamma-emitting isotopes.Collection:

Quarterly Composite Units: pCi/mr Location D-15 Quarter Lab Code Volume (m 6)Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-1 37 Ce-141 Ce-144 1st Quarter DAP- 1754 3092 0.076 +/- 0.015< 0.0008< 0.0012< 0.0008< 0.0010< 0.0004< 0.0018< 0.0013< 0.0045< 0.0008< 0.0006< 0.0016< 0.0058 2nd Quarter DAP- 3687 3605 0.120 +/- 0.019< 0.0011< 0.0018< 0.0005< 0.0006< 0.0005< 0.0013< 0.0006< 0.0072< 0.0007< 0.0006< 0.0007< 0.0039 3rd Quarter DAP- 5941 3710 0.082 t 0.018< 0.0008< 0.0018< 0.0005< 0.0008< 0.0013< 0.0021< 0.0016< 0.0087< 0.0009< 0.0009< 0.0025< 0.0042 4th Quarter DAP- 7520 3699 0.076 +/- 0.017< 0.0011< 0.0016< 0.0009< 0.0009< 0.0012< 0.0010< 0.0010< 0.0048< 0.0005< 0.0006< 0.0012< 0.0048 Location D-16 Lab Code Volume (mi)Be-7 Mn-54 Fe-59 Co-58 Co-60 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 DAP- 1755 3146 0.070 +/- 0.015< 0.0007< 0.0013< 0.0008< 0.0007< 0.0011< 0.0010< 0.0011< 0.0049< 0.0006< 0.0007< 0.0009< 0.0052 DAP- 3688 2899 0.074 +/- 0.016< 0.0009< 0.0019< 0.0004< 0.0012< 0.0006< 0.0008< 0.0010< 0.0073< 0.0007< 0.0007< 0.0013< 0.0056 DAP- 5942 3711 0.074 +/- 0.019< 0.0007< 0.0018< 0.0012< 0.0008< 0.0012< 0.0006< 0.0015< 0.0067< 0.0008< 0.0007< 0.0016< 0.0040 DAP- 7521 3772 0.077 +/- 0.014< 0.0007< 0.0010< 0.0006< 0.0005< 0.0015< 0.0020< 0.0011< 0.0083< 0.0006< 0.0008< 0.0020< 0.0037 9-3 DUANE ARNOLD Table 10. Area monitors (TLD), Quarterly Units: mR/91 days Air Stations 1st Qtr.2nd Qtr.3rd Qtr.4th Qtr.D-1 D-2 D-3 D-5 D-6 D-7 D-8 D-10 D-11 D-13 D-1 5 D-1 6 17.9 +/- 0.6 15.7 + 1.3 15.6 +/-0.7 15.5 +/-0.8 15.1 +/-0.6 13.7 +/- 0.7 17.3 +/- 0.6 14.9 +/- 0.6 14.3 +/- 0.6 13.9 +/- 0.5 15.1 +/-0.8 17.1 +/- 0.5 15.5 +/- 1.3 16.1 +/- 0.9 14.4 +/- 1.5 17.4 +/- 0.7 19.4 +/- 0.6 20.0 +/- 0.6 18.5 +/- 1.1 21.8 +/- 1.3 ND" 18.3 +/- 1.9 18.3 +/- 0.9 18.0 +/- 0.7 17.2 +/- 1.9 18.1 +/- 2.0 19.5 +/- 1.4 17.5 +/- 1.8 15.9 +/- 1.3 20.3 +/- 1.6 17.3 +/- 1.7 18.4 +/- 1.3 20.8 +/- 1.1 20.6 +/- 1.0 15.7 +/- 1.1 19.4 +/- 1.2 19.7 +/- 1.3 19.5 +/- 1.3 18.7 +/- 1.7 17.8 +/- 1.1 15.4 +/- 1.6 17.4 +/- 0.7 22.5 +/- 1.3 20.3 +/- 0.6 19.3 +/- 1.0 24.2 +/- 0.9 16.0 +/- 0.7 18.4 +/- 1.8 19.6 +/- 0.8 17.7 +/- 0.8 19.6 +/- 2.0 19.0 +/- 2.5 Mean +/- s.d.Within 0.5 mi. of Stack D-17 D-18 D-19 D-20 D-21 D-22 D-23 D-28 D-29 D-30 D-31 D-32 D-82 D-83 D-84 D-85 D-86*D-91 16.2 +/- 0.7 16.8 +/- 0.9 16.8 +/- 0.7 17.8 +/- 0.6 17.0 +/- 0.8 15.9 +/- 0.7 16.2 +/- 0.6 15.3 +/- 0.6 18.1 +/- 0.6 17.5 +/- 0.8 18.9 +/- 0.9 19.6 +/- 0.5 15.0 +/-0.5 15.7 +/- 0.6 15.9 +/- 0.7 15.4 +/- 0.4 17.7 +/- 1.0 13.7 +/- 0.6 16.6 +/- 1.5 19.1 +/- 1.9 NDa NDa 19.4 +/- 0.9 ND3 15.4 +/- 0.9 16.3 +/- 0.9 21.5 +/- 0.9 22.6 +/- 1.2 20.4 +/- 1.5 22.0 +/- 1.2 20.3 +/- 1.3 NDa 16.9 +/- 0.6 16.2 +/- 0.7 15.8 +/- 0.8 17.2 +/- 1.1 16.9 +/- 1.0 18.6 +/- 2.5 21.1 +/- 1.3 NDa ND 8 22.4 +/- 1.2 20.8 +/- 1.3 18.6 +/- 1.2 20.3 +/- 1.2 23.0 +/- 1.2 26.0 +/- 1.2 27.3 +/- 1.6 24.2 +/- 1.8 26.3 +/- 1.1 17.4 +/- 1.0 19.7 +/- 1.2 20.2 +/- 1.3 20.6 +/- 1.1 21.5 +/- 1.4 15.6 +/- 1.1 21.6 +/- 3.2 21.0 +/- 1.0 20.2 +/- 1.0 19.7 +/- 0.8 21.8 +/- 0.9 19.2 +/- 0.7 18.8 +/- 0.7 18.8 +/- 1.1 24.3 +/- 0.9 26.0 +/- 1.7 24.3 +/- 1.7 25.4 +/- 1.2 23.4 +/- 1.4 15.0 +/- 0.6 18.6 +/- 0.6 18.9 +/- 0.8 18.5 +/- 0.9 20.5 +/- 1.2 16.7 +/- 0.9 20.6 +/- 3.0 Mean +/- s.d.a "ND" = No data; see Table 2.0, Listing of Missed Samples.10-1 DUANE ARNOLD Table 10. Area monitors (TLD), Quarterly Units: mR/91 days Within 1.0 mi. of Stack 1st Qtr.2nd Qtr.3rd Qtr.4th Qtr.D-43 D-44 D-45 D-46 D-47 D-48 14.2 +/- 0.7 17.0 +/- 0.5 15.0 +/- 0.6 16.6 +/- 0.7 16.2 +/- 0.7 17.7 +/- 0.6 16.1 +/- 1.3 18.0 +/- 1.2 22.1 +/- 0.7 17.4 +/- 1.0 21.3 +/- 1.0 21.3 +/- 0.9 23.0 +/- 1.1 20.5 +/- 2.3 18.3 +/- 1.7 21.6 +/- 1.1 18.1 +/- 1.0 20.4 +/- 1.4 20.4 +/- 1.2 21.6 +/- 1.0 20.1 +/- 1.5 18.5 +/- 1.3 22.7 +/- 0.7 18.3 +/- 1.1 23.2 +/- 1.1 22.7 +/- 1.0 24.2 +/- 1.1 21.6 +/- 2.5 Mean +/- s.d.Within 3.0 mi. of Stack D-33 D'34 D-35 D-36 D-37 D-38 D-39 D-40 D-41 D-42 14.4 +/- 0.5 14.4 +/- 0.5 14.5 +/-0.7 14.7 +/- 0.8 19.0 +/- 0.9 15.3 +/- 0.8 15.8 +/- 0.7 14.1 +/- 0.7 14.7 +/- 0.6 14.9 +/- 0.6 15.2 +/- 1.4 17.4 +/- 0.7 16.2 +/- 0.9 16.3 +/- 0.9 16.6 +/- 0.7 21.8 +/- 2.4 19.4 +/- 0.9 18.4 +/- 0.8 16.1 +/- 0.9 16.8 +/- 1.2 17.3 +/- 1.4 17.6 +/- 1.8 15.5 +/- 1.0 18.1 +/- 1.4 17.5 +/- 1.0 NDa 20.0 +/- 1.5 18.4 +/- 1.2 19.4 +/- 1.1 15.5 +/- 1.3 17.2 +/- 1.2 16.1 +/-1.1 17.5 +/- 1.6 17.6 +/-0.6 16.8 +/- 0.8 16.6 +/- 0.6 18.0 +/- 0.9 25.2 +/- 1.0 20.0 +/- 0.8 20.4 +/- 0.6 17.2 +/- 0.9 18.1 +/-0.7 18.1 +/- 1.3 18.8 +/- 2.6 Mean +/- s.d.a."ND' = No data; see Table 2.0, Listing of Missed Samples.10-2 DUANE ARNOLD Table 11. Milk samples, analyses for iodine-1 31 and gamma emitting 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 01-08-08 DMI- 76 < 0.3 1367 +/- 86 < 2.1 < 2.2 < 10.4 < 2.5 02-05-08 DMI- 471 <0.3 1326 +/- 110 <3.8 <3.0 <17.3 <4.1 03-04-08 DMI- 843 < 0.3 1416 +/- 105 < 3.7 < 4.9 < 13.1 < 1.7 04-01-08 DMI- 1321 < 0.3 1539 +/- 108 < 3.4 < 3.7 < 17.7 < 1.9 05-06-08 DMI- 2213 < 0.2 1387 +/- 105 < 3.2 < 3.5 < 9.5 < 1.3 05-20-08 DMI- 2438 <0.4 1470 +/- 110 <3.0 <3.0 <11.6 <2.1 06-03-08 DMI- 2699 < 0.4 1514 +/- 122 < 3.7 < 3.8 < 12.4 < 1.3 06-17-08 DMI- 3031 < 0.3 1255 +/- 102 < 2.8 < 2.8 < 12.2 < 1.4 07-01-08 DMI- 3314 < 0.2 1471 +/- 107 < 2.0 < 3.3 < 13.8 < 2.9 07-15-08 DMI- 3649 < 0.3 1587 +/- 122 < 3.9 < 4.0 < 15.2 < 3.4 07-29-08 DMI- 3907 < 0.3 1254 +/- 117 < 3.3 < 3.9 < 9.5 < 2.5 08-12-08 DMI- 4237 < 0.4 980 +/- 79 < 2.4 < 2.5 < 9.2 < 1.8 08-26-08 DMI- 4531 <0.3 1381 +/- 114 <4.0 <3.1 <10.9 <3.0 09-09-08 DMI- 4860 < 0.4 1485 +/- 118 < 3.3 < 3.9 < 14.8 < 3.6 09-23-08 DMI- 5115 <0.3 1391 +/- 125 <3.1 <4.1 <12.2 <2.4 10-14-08 DMI- 5775 < 0.4 1579 +/- 120 < 2.8 < 3.4 < 17.2 < 1.7 11-04-08 DMI- 6302 <0.3 1284 +/- 112 <2.7 <2.4 <13.7 <2.6 12-02-08 DMI- 6823 <0.4 1528 +/- 114 <2.9 <3.6 <11.3 <1.2 Location D-110 Date Lab Concentration (pCi/L)Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-1 40 La-140 01-08-08 DMI- 77 < 0.3 1309 +/- 100 < 2.4 < 3.3 < 10.6 < 2.5 02-05-08 DMI- 472 < 0.4 1343 +/- 116 < 3.2 < 2.6 < 14.5 < 3.8 03-04-08 DMI- 844 <0.1 1314 +/- 114 <3.8 <2.7 <9.3 <2.1 04-01-08 DMI- 1322 < 0.4 1376 +/- 104 < 2.9 < 4.0 < 12.4 < 1.7 05-06-08 DMI- 2214 < 0.3 1424 +/- 104 < 2.9 < 4.0 < 13.0 < 1.8 05-20-08 DMI- 2439 < 0.5 1397 +/- 110 < 3.3 < 3.3 < 11.9 < 2.0 06-03-08 DMI- 2700 <0,4 1510 +/- 117 <3.2 <3.6 <18.1 <2.1 06-17-08 DMI- 3032 < 0.2 1362 +/- 105 < 3.4 < 3.9 < 17.1 < 2.1 07-01-08 DMI- 3315 < 0.2 1371 +/- 99 < 2.2 < 3.2 < 14.9 < 2.7 07-15-08 DMI- 3650 < 0.4 1424 +/- 118 < 2.6 < 2.4 < 11.4 < 2.1 07-29-08 DMI- 3908 <0.3 1491 +/- 106 <3.1 <3.9 <11.1 <2.8 08-12-08 DMI- 4238 < 0.2 1324 +/- 85 < 2.0 < 2.7 < 8.3 < 2.2 08-26-08 DMI- 4532 < 0.3 1359 +/- 104 < 2.2 < 3.2 < 15.8 < 2.7 09-09-08 DMI- 4861 < 0.4 1389 +/- 119 < 2.6 < 4.1 < 12.0 < 3.1 09-23-08 DMI- 5116 <0.4 1422 +/- 107 <2.5 <3.8 <10.9 <2.1 10-14-08 DMI- 5776 <0.4 1385 +/- 114 <3.4 <2.9 <21.9 <4.4 11-04-08 DMI- 6303 <0.3 1419 +/- 110 <2.5 <3.2 <13.2 <2.3 12-02-08 DMI- 6824 < 0.4 1438 +/- 103 < 3.1 < 3.2 < 11.8 < 1.7 11-1 DUANE ARNOLD Table 12.1. Well water samples, analyses for gross beta and tritium.Collection:

Quarterly Units: pCi/L Location D-53 Treated Municipal Water Collection Date 03-18-08 06-23-08 09-17-08 11-25-08 Lab Code DWW-1160 DWW-3212 DWW-4976 DWW-6748 Gross Beta 1.6 +/- 0.6 a 2.3 +/- 0.8 2.1 +/- 1.0 1.2 +/- 0.3 H-3 < 173 < 169 < 157 < 152 Location D-54 Inlet to Municipal Water Collection Date 03-18-08 06-23-08 09-17-08 11-25-08 Lab Code DWW-1161 DWW-3213 DWW-4977 DWW-6749 Gross Beta 3.8 +/- 2.0 2.7 +/- 0.8 3.7 +/- 1.1 1.6 +/- 0.3 H-3 < 173 < 169 < 157 < 152 Location D-55 On-site Well Collection Date 03-17-08 06-23-08 09-16-08 11-24-08 Lab Code DWW-1162 DWW-3214 DWW-4979 DWW-6750 Gross Beta < 1.8 < 1.4 < 1.8 < 0.5 H-3 < 173 <.169 < 157 < 152 Location D-57 Bull Farm Collection Date 03-17-08 06-23-08 09-16-08 11-24-08 Lab Code DWW-1163 DWW-3215 DWW-4980 DWW-6751 Gross Beta < 1.7 1.5 +/- 0.7 < 1.0 b< 0.4 H-3 < 173 < 169 < 157 < 152 Location D-58 Franz Farm Collection Date 03-17-08 06-23-08 09-16-08 11-24-08 Lab Code DWW-1164 DWW-3216 DWW-4981 DWW-6752 Gross Beta 2.7 +/- 1.1 4.8 +/- 0.9 4.2 +/- 1.3 b 3.1 + 0.4 H-3 < 173 < 169 < 157 < 152 Location D-72 Van Note Farm Collection Date 03-17-08 06-23-08 09-16-08 11-24-08 Lab Code DWW-1165 DWW-3217 DWW-4982 DWW-6753 Gross Beta < 1.6 < 0.7 < 0.9 < 0.4 H-3 < 173 < 169 < 157 < 152 a Result of longer sample recount.b Corrected, sample locations were mislabelled.

12-1 Table 12.2. Ground water, Monitoring wells, analyses for gross beta and tritium a Collection:

Quarterly Units: pCi/L Location MW-01A (shallow)Collection Date 03-19-08 06-24-08 09-16-08 11-19-08 Lab Code DWW-1166 DWW-3218 DWW-4983 DWW-6608 Gross Beta < 1.8 2.9 +/- 0.6 3.0 +/- 0.7 2.4 +/- 0.6 H-3 < 173 < 157 < 157 194 +/- 81 Location MW-01B (intermediate)

Collection Date 03-19-08 06-24-08 09-16-08 11-19-08 Lab Code DWW-1167 DWW-3219 DWW-4984 DWW-6609 Gross Beta < 1.8 < 0.6 0.9 +/- 0.5 < 0.8 H-3 < 173 < 169 < 157 < 145 Location MW-02A (shallow)Collection Date 03-19-08 06-24-08 09-16-08 11-19-08 Lab Code DWW-1 168 DWW-3220 DWW-4985 DWW-6610 Gross Beta < 1.9 1.9 +/- 0.5 2.6 +/- 0.8 2.9 +/- 1.2 H-3 < 173 < 169 < 157 < 145 Location MW-02B (intermediate)

Collection Date 03-19-08 06-24-08 09-16-08 11-19-08 Lab Code DWW-1169 DWW-3221 DWW-4986 DWW-6611 Gross Beta < 1.7 1.0 +/- 0.4 1.1 +/- 0.6 < 1.8 H-3 < 173 < 169 < 157 < 145 Location MW-03A (shallow)Collection Date 03-19-08 06-24-08 09-10-08 11-19-08 Lab Code DWW-1170 DWW-3222 DWW-4937 DWW-6612 Gross Beta 2.7 +/- 1.2 6.6 +/- 1.1 4.5 +/- 0.7 6.3 +/- 1.3 H-3 < 173 < 169 < 163 < 145 Location MW-03B (intermediate)

Collection Date 03-19-08 06-24-08 09-10-08 11-19-08 Lab Code DWW-1171 DWW-3223 DWW-4938 DWW-6613 Gross Beta < 1.6 2.6 +/- 0.8 1.5 +/- 0.5 1.7 +/- 0.7 H-3 < 173 < 169 < 163 < 145 a Result of reanalysis; sample counted longer to achieve lower LLD.12-2 Table 12.2. Ground water, Monitoring wells, analyses for gross beta and tritium.Collection:

Quarterly Units: pCi/L Location MW-04A (shallow)Collection Date 03-19-08 06-24-08 09-10-08 11-19-08 Lab Code DWW-1172 DWW-3224 DWW-4939 DWW-6737 Gross Beta 3.8 +/- 2.1 3.4 +/- 0.9 2.0 +/- 0.5 < 0.8 H-3 < 173 < 157 172 +/- 106a < 152 Location MW-04B (intermediate)

Collection Date 03-19-08 06-24-08 09-10-08 12-01-08 Lab Code DWW-1 174 DWW-3226 DWW-4940 DWW-6822 Gross Beta < 1.8 1.3 +/- 0.5 1.3 +/- 0.4 1.6 +/- 0.4 H-3 < 173 < 157 < 163 < 152 Location MW-05A (shallow)Collection Date 03-19-08 06-24-08 09-10-08 11-19-08 Lab Code DWW-1175 DWW-3227 DWW-4941 DWW-6655 Gross Beta 1.9 +/- 1.0 1.2 +/- 0.5 1.2 +/- 0.5 1.8 +/- 1.0 H-3 < 173 < 157 < 163 < 145 Location MW-05B (intermediate)

Collection Date 03-19-08 06-24-08 09-10-08 11-19-08 Lab Code DWW-1176 DWW-3228 DWW-4942 DWW-6656 Gross Beta < 1.7 1.2 +/- 0.6 2.2 +/- 0.6 2.1 +/- 0.7 H-3 < 173 < 157 < 163 < 145 Location MW-06A (shallow)Collection Date 03-19-08 06-24-08 09-16-08 11-19-08 Lab Code DWW-1 177 DWW-3229 DWW-4987 DWW-6738 Gross Beta 5.5 +/- 1.3 6.5 +/- 0.9 8.7 +/- 1.4 3.2 +/- 0.6 H-3 < 173 < 157 246 +/- 90b 433 +/- 109 Location MW-06B (intermediate)

Collection Date 03-19-08 06-24-08 09-16-08 11-19-08 Lab Code DWW-1178 DWW-3230 DWW-4988 DWW-6739 Gross Beta < 1.7 2.9 +/- 0.9 3.1 +/- 1.1 0.9 +/- 0.6 H-3 < 173 < 157 < 157 < 152 aTritium repeated with a result of 193+/-102 pCi/L.b Tritium recounted with a result of 236+/-105 pCi/L.12-3 DUANE ARNOLD Table 13. Vegetation (broadleaf), analyses for iodine-131 and other gamma-emitting isotopes.Collection:

Annually Units: pCi/g wet Location D-15 D-57 D-109 Lab Code DVE- 2701 DVE- 2702 DVE- 2704 Date Collected 06-02-08 06-02-08 06-02-08 Sample Type Broadleaf Broadleaf Broadleaf K-40 3.83 +/- 0.63 4.26 +/- 0.52 2.78 +/- 0.42 Mn-54 < 0.023 < 0.025 < 0.015 Fe-59 < 0.056 < 0.034 < 0.024 Co-58 < 0.024 < 0.016 < 0.014 Co-60 < 0.019 < 0.017 < 0.019 Nb-95 < 0.023 < 0.025 < 0.007 Zr-95 < 0.025 < 0.029 < 0.021 Ru-103 < 0.022 < 0.026 < 0.021 Ru-106 < 0.26 < 0.14 < 0.14 1-131 < 0.041 < 0.032 < 0.033 Cs-134 < 0.021 < 0.010 < 0.009 Cs-137 < 0.024 < 0.018 < 0.011 Ce-141 < 0.043 < 0.039 < 0.025 Ce-144 < 0.10 < 0.10 < 0.14 D-108 (C)Lab Code DVE- 2703 Date Collected 06-02-08 Sample Type Broadleaf K-40 4.96 +/- 0.72 Mn-54 < 0.023 Fe-59 < 0.036 Co-58 < 0.015 Co-60 < 0.031 Nb-95 < 0.016 Zr-95 < 0.027 Ru-1 03 < 0.029 Ru-106 < 0.22 1-131 < 0.050 Cs-1 34 < 0.017 Cs-1 37 < 0.025 Ce-141 < 0.050 Ce-144 < 0.18 13-1 DUANE ARNOLD Table 14. Vegetation (hay and grain), analyses for gamma-emitting isotopes.Collection:

Annually Units: pCi/g wet Location D-16 D-57 D-57 D-58 Lab Code DVE- 5894 DVE- 5562 DVE- 5895 DVE- 5896 Date Collected 10-20-08 10-06-08 10-20-08 10-20-08 Sample Type Beans Forage-Hay Corn Corn K-40 5.47 +/- 0.32 17.07 +/- 0.63 2.28 +/- 0.26 1.99 +/- 0.27 Mn-54 < 0.013 < 0.023 < 0.007 < 0.015 Fe-59 < 0.018 < 0.058 < 0.014 < 0.027 Co-58 < 0.011 < 0.013 < 0.005 < 0.008 Co-60 < 0.011 < 0.021 < 0.006 < 0.011 Nb-95 < 0.018 < 0.031 < 0.005 < 0.010 Zr-95 < 0.016 < 0.024 < 0.013 < 0.014 Ru-103 < 0.013 < 0.026 < 0.007 < 0.018 Ru-106 < 0.094 < 0.22 < 0.05 < 0.107 Cs-134 < 0.011 < 0.017 < 0.006, < 0.009 Cs-137 < 0.015 < 0.025 < 0.006 < 0.012 Ce-141 < 0.022 < 0.043 < 0.011 < 0.021 Ce-144 < 0.064 < 0.17 < 0.06 < 0.093 Control Location D-72 D-72 D-108 D-108 Lab Code DVE- 5563 DVE- 5897 DVE- 5564 DVE- 5898 Date Collected 10-06-08 10-20-08 10-06-08 10-20-08 Sample Type Forage-Hay Corn Forage-Hay Corn K-40 17.48 +/- 0.72 2.25 +/- 0.29 27.75 +/- 0.73 2.67 +/- 0.23 Mn-54 < 0.024 < 0.008 < 0.025 < 0.008 Fe-59 < 0.051 < 0.021 < 0.042 < 0.012 Co-58 < 0.022 < 0.009 < 0.017 < 0.004 Co-60 < 0.018 < 0.010 < 0.025 < 0.007 Nb-95 < 0.029 < 0.008 < 0.036 < 0.009 Zr-95 < 0.030 < 0.010 < 0.042 < 0.013 Ru-103 < 0.030 < 0.006 < 0.023 < 0.006 Ru-106 < 0.22 < 0.10 < 0.21 < 0.08 Cs-134 < 0.026 < 0,011 < 0.023 < 0.008 Cs-1 37 < 0.023 < 0.008 < 0.024 < 0.010 Ce-141 < 0.051 < 0.016 < 0.046 < 0.010 Ce-144 < 0.182 < 0.04 < 0.164 < 0.04 14-1 DUANE ARNOLD Table 15, Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.Collection:

Monthly Units: pCi/L Location:

D-49 Lab Code DSW- 126 Date Collected 01-09-08 H-3 1-131 (Chemistry)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-1 37 Ba-140 La-140< 149< 0.2< 3.3<5.2<2.7<3.1< 3.2< 4.0< 4.8< 4.6< 3.7< 1.9< 11.0< 2.4 DSW- 811 02-27-08< 179< 0.4< 1.8< 4.7< 2.8< 2.9< 4.6< 3.0< 4.4< 7.7< 3.2< 3.3< 16.0< 2.7 03-13-08< 150< 0.3< 2.2< 4.9<3.7< 2.3< 2.0< 3.4< 4.7<5.5< 3.3< 3.4< 15.9< 2.8 04-30-08< 158< 0.3< 2.2< 5.6< 2.1< 2.2< 3.2< 3.3< 5.9< 7.5<3.7< 3.0< 13.4< 2.5 05-27-08< 167< 0.4< 3.8< 4.3<3.1< 2.3< 3.0< 2.8< 5.8< 6.5< 3.0< 4.4< 19.9< 2.4 DSW- 1033 DSW- 2029 DSW- 2633 DSW- 3206 06-23-08< 169< 0.3< 2.7< 5.8< 1.8< 2.4< 7.3< 2.7< 5.9< 5.8< 2.5< 4.2< 20.6< 3.8 DSW- 3849 DSW- 4629 DSW- 5108 DSW- 5899 DSW- 6740 DSW- 7166 07-22-08 08-28-08 09-21-08 10-22-08 11-24-08 12-29-08 H-3< 145< 0.3 1-131 (Chemistry)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-1 37 Ba-140 La-140< 1.8<3.1< 1.7< 2.0< 5.2< 1.7< 5.6<4.1<2.1< 3.0< 8.5<2.3< 152< 0.2< 2.3<3.1< 1.8< 2.5< 4.5< 2.3< 4.6< 3.2< 2.7< 3.3< 13.6< 3.9< 147< 0.3<2.1< 2.8< 1.5< 2.9< 3.3< 2.9< 4.9< 4.6< 2.6< 3.0< 12.8<2.8* 155< 0.3< 2.3<3.1< 2.0< 2.4< 3.3<3.2<3.1< 3.8<3.1< 1.7< 14.9< 1.5< 152< 0.4< 2.5< 7.2<3.1<2.1< 3.1< 3.0< 4.2< 5.3< 2.5< 3.2< 11.3< 3.3< 168< 0.4<2.1< 4.6< 2.3< 1.8< 5.3< 2.4< 5.9< 4.9< 2.6< 2.4< 12.4< 1.7 15-1 DUANE ARNOLD Table 15. Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.Collection:

Monthly Units: pCi/L Location:

D-50 Lab Code Date Collected DSW- 127 01-09-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140< 149< 1.5<5.1< 2.8< 2.4< 4.7< 2.2<4.1< 6.9< 3.0< 1.8< 15.2< 3.4 DSW- 812 02-27-08* 179< 2.4< 3.4<3.1< 1.9<5.1< 3.1< 5.7< 5.5< 3.5< 2.0< 10.1< 3.9< 150< 4.5< 3.9< 3.9< 2.4< 6.2< 4.2< 6.7< 6.7<5.6< 5.5< 17.0< 4,9< 158< 2.2< 3.5< 2.4< 1.7< 3.3< 3.5< 3.5< 3.9< 2.9< 2.8< 7.4< 2.7< 167< 1.9< 4.8<2.1< 2.0< 3.0<3.1< 3.5< 4.6< 3.2< 2.0< 14.9< 2.7< 169< 1.8<4.3< 3.8< 2.7< 3.9< 3.9< 6.6< 7.0< 3.3< 3.7< 11.4< 5.7 DSW- 1034 DSW- 2030 DSW- 2634 DSW- 3207 03-13-08 04-29-08 05-27-08 06-23-08 DSW- 3850 DSW- 4508 DSW- 5109 DSW- 5900 DSW- 6741 DSW- 7167 07-22-08 08-20-08 09-21-08 10-22-08 11-24-08 12-29-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140< 145< 3.5< 7.9< 3.4< 3.8< 8.3< 2.9< 7.4< 10.4< 3.6<3.7< 15.7<5.1< 143< 2.5< 4.3< 2.6< 2.5< 4.7< 2.6< 4.2< 7.0< 3.8< 2.9< 14.4< 3.5< 147< 1.6< 4.3< 1.8< 2.6< 5.6< 1.7< 5.8< 4.8< 3.4< 2.4< 15.6<3.1* 155< 2.3< 3.6< 1.3< 1.5< 4.5< 2.9< 4.2< 4.6< 2.4< 2.4< 13.0< 2.6< 152< 3.7<5.1< 4.2< 3.4<5.1<2.1< 4.5< 7.8<3.1< 4.2< 21.6< 1,7* 168< 2.5< 5.7< 2.4* 2.2< 5.6< 3.2< 5.1< 8.5< 3.4<3.0< 18.9< 2.9 15-2 DUANE ARNOLD Table 15. Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.Collection:

Monthly Units: pCi/L Location:

D-51 Lab Code Date Collected DSW- 128 01-09-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-i 34 Cs-1 37 Ba-140 La-140< 149< 2.4< 3.0<2.1< 2.5< 3.6< 3.4< 4.2< 7.6< 2.5< 3.6< 16.4< 3.4 DSW- 814 02-27-08< 179<4.1< 4.6< 6.6< 2.9<5.8< 3.4< 7.6< 6.6< 4.7<4.1< 20.8<3.1< 150< 3.5< 6.1< 1.7< 4.0< 4.8< 3.8< 8.3< 6.4< 3.6< 2.7< 22.2<6.1< 158< 2.7< 3.8< 1.3< 2.9< 6.9< 3.0< 6.3<3.1< 3.3< 2.8< 13.7< 3.8< 167< 3.2< 6.9< 2.5< 2.0< 5.1< 2.2< 3.8< 8.0< 3.6< 2.9< 8.6< 3.7< 169< 2.9< 5.3< 2.6< 2.0< 3.3< 2.7< 2.4< 6.0< 2.3< 3.2< 12.0<3.1 DSW- 1035 DSW- 2031 DSW- 2635 DSW- 3208 03-13-08 04-29-08 05-27-08 06-23-08 DSW- 3851 DSW- 4509 DSW- 5111 DSW- 5901 DSW- 6742 DSW- 7168 07-22-08 08-20-08 09-21-08 10-22-08 11-24-08 12-29-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-1 40 La-140< 145< 4.2< 9.5<3.1< 3.5< 8.2< 3.8< 7.7< 5.6< 3.4< 3.7< 28.3< 2.4< 143< 2.5<2.1< 1.7< 2.0< 4.3< 2.9<3.7< 5.5< 2.6< 3.7< 15.1< 3.6< 161< 2.7< 6.3<2.1< 2.8< 5.2< 3.6< 7.3<5.1< 3.9< 4.6< 16.8< 2.0< 155< 3.3< 5.0< 2.2< 2.0< 4.6< 2.7< 8.2<7.1< 3.4< 4.3< 15.1< 3.8< 152< 2.3< 6.2< 2.6< 3.9< 4.1<5.1< 7.7<7.1< 2.8< 3.5< 14.7< 3.9< 168< 2.5< 3.8< 2.8< 1.6< 2.4< 2.9< 4.2<6.1<2.1< 2.0< 16.4< 3.0 15-3 DUANE ARNOLD Table 15. Surface water samples, analyses for iodine-131, tritium and gamma-emitting isotopes.Collection:

Monthly Units: pCi/L Location:

D-61 Lab Code DSW- 129 Date Collected 01-09-08 H-3 1-131 (Chemistry)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-1 37 Ba1140 La-1 40< 149< 0.2< 2.5< 3.7< 2.2< 2.3< 6.7< 2.8< 3.4< 6.7< 2.5<3.7< 15.5< 3.9 DSW- 815 02-27-08< 179< 0.4<3.5<5.1< 2.5< 2.2< 2.1< 2.9< 5.2< 4.0< 2.4< 2.2< 13.3< 2.6< 150< 0.3< 3.7<7.1< 2.3< 1.6< 7.5< 3.0< 4.9< 7.8< 3.5<2.7< 15.1< 2.5< 158< 0.3<3.1<7.5< 3.0<3.5< 1.9< 2.6< 4.0< 3.2< 2.8<3.1< 10.6< 1.5< 167< 0.2< 2.4< 2.3< 1.9< 1.0< 2.9< 1.5< 3.9< 5.9< 3.0< 3.4< 15.4<3.1 DSW- 1036 DSW- 2032 DSW- 2636 DSW- 3209 03-13-08 04-29-08 05-27-08 06-23-08< 169< 0.3< 3.5< 4.9< 2.0< 3.0< 6.8< 5.0< 5.5< 7.3< 3.9< 2.6< 20.0<3.1 DSW- 3852 DSW- 4510 DSW- 5112 DSW- 5902 DSW- 6744 DSW- 7169 07-22-08 08-20-08 09-21-08 10-22-08 11-24-08 12-29-08 H-3 1-131 (Chemistry)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-137 Ba-140 La-140< 145< 0.6< 2.6< 7.9< 2.1< 2.8< 2.5<3.1< 6.0< 4.4< 2.4< 3.0< 15.8< 3.0< 143< 0.4< 4.8< 4.6< 5.4<6.1< 6.7< 4.9<8.7< 9.2< 3.8< 4.7< 21.5< 6.0< 161< 0.3<4.1<5.3< 3.1< 2.7< 7.8< 3.2< 7.2< 3.9< 4.7< 2.9< 14.2< 4.2< 155< 0.2< 1.4< 5.0< 2.0< 2.4< 3.3< 4.2< 5.2< 7.6< 2.2< 3.7< 13.2< 3.0< 152< 0.5< 2.7< 7.2< 3.6< 2.8< 4.5< 4.3< 4.6< 8.5< 3.3< 4.3< 16.7< 1.8< 168< 0.4<2.1< 3.8< 1.9< 2.4<2.1< 1.2< 4.7< 4.9< 3.0< 2.9< 13.2< 1.7 15-4 DUANE ARNOLD Table 15. Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.Collection:

Monthly Units: pCi/L Location:

D-99 Lab Code Date Collected DSW- 130 01-09-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-137 Ba-1 40 La-140< 149< 2.2< 4.6< 2.4< 2.0< 4.0< 2.8< 4.9<,4.1<2.1< 2.9< 11.8< 1.4 DSW- 816 02-27-08< 179< 6.0< 7.8< 4.0< 2.7<4.1< 5.3< 6.4< 5.1< 4.0< 3.7< 19.4< 4.8< 150<2.4< 2.2< 1.6< 0.9< 2.5< 4.0< 5.2< 5.0< 2.9< 3.2< 12.1< 1.7< 158< 4.3< 4.4< 3.5< 4.0< 5.4< 5.7< 8.0< 9.2< 5.7< 2.5< 16.4< 5.4< 167< 3.4< 6.9< 2.0< 3.0< 4.8< 3.2<5.5< 4.4< 3.7< 4.2< 19.5< 1.5< 169< 4.3< 6.9< 3.6< 3.6< 2.6< 3.1< 6.0< 10.2< 3.4< 5.6<26.8< 3.9 DSW- 1037 DSW- 2033 DSW- 2637 DSW- 3210 03-13-08 04-30-08 05-27-08 06-23-08 DSW- 3853 DSW- 4630 DSW- 5113 DSW- 5903 DSW- 6745 DSW- 7170 07-22-08 08-28-08 09-21-08 10-22-08 11-24-08 12-29-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-137 Baý140 La-1 40< 145<2.1< 3.6< 2.7<2.1< 4.9< 1.5< 4.7< 4.9< 3.3< 3.6< 15.8< 4.7<. 152< 2.6< 2.9< 1.4< 2.4< 5.0< 3.3< 4.5< 4.8< 2.3< 2.5< 13.0< 3.4< 161< 1.7< 2.5< 1.9< 1.9< 3.4< 1.3< 2.5< 4.7< 2.4< 2.7< 11.8< 3.5< 155< 2.0< 3.8< 2.1< 2.7< 4.4< 2.6< 5.6< 3.3< 3.6< 2.5< 9.0< 2.3< 152< 1.9< 5.6< 2.7< 2.1< 6.9< 1.8< 5.4< 5.7< 2.8< 2.5< 14.4< 2.5< 168< 2.9< 2.3<3.1< 3.0.< 3.7< 2.3< 7.2< 6.3< 2.6< 3.9< 20.5< 2.3 15-5 DUANE ARNOLD Table 15. Surface water samples, analyses for iodine-131, tritium and gamma-emitting isotopes.Collection:

Monthly Units: pCi/L Location:

D-107 Lab Code Date Collected DSW- 131 DSW- 817 DSW- 1038 DSW- 2034 DSW- 2638 DSW- 3211 01-09-08 02-27-08 03-13-08 04-29-08 05-27-08 06-23-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-137 Ba-140 La-140< 149< 3.5< 4.9< 3.2< 2.2< 2.2< 3.9< 6.6< 6.7< 3.2< 3.7< 19.8<3.1< 178< 2.2< 3.9<2.1< 3.4< 3.2< 4.5< 3.3< 7.6< 2.8< 3.8< 23.6< 3.2< 150< 3.3< 7.2< 2.8< 3.3< 4.9< 3.6< 5.0< 6.2< 3.2< 3.4< 10.4< 1.9< 158< 2.3< 5.7< 2.5< 1.6<4.1< 3.8< 5.3< 6.0< 3.4< 2.2< 8.4<2.1< 167< 1.3< 3.0< 2.0< 1.4< 4.8< 2.5< 4.7< 4.8< 2.4< 2.8< 13.5< 3.2< 169< 3.9< 6.1< 5.2< 4.6< 12.2< 5.8< 7.8< 12.5< 4.3< 3.8< 26.7< 5.0 DSW- 3854 DSW- 4511 DSW- 5114 DSW- 5904 DSW- 6746 DSW- 7171 07-22-08 08-20-08 09-21-08 10-22-08 11-24-08 12-29-08 H-3 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-1 37 Ba-140 La-140< 150< 2.3< 3.2< 2.8< 2.4< 4.6< 3.3< 6.3< 4.9< 2.9< 1.7< 9.4< 3.7< 158< 3.6< 8.6< 3.4< 4.2< 2.5< 3.8< 7.9< 8.6< 4.5< 3.8< 24.0< 5.2< 161< 2.9< 6.0<2.1< 3.4< 4.3< 3.2< 4.3< 4.6<3.1< 3.6< 15.2< 4.2< 155< 5.0<8.1< 2.7< 6.4< 3.2<3.1< 11.6< 8.9<3.1< 5.0< 27.0< 5.0< 152< 2.7<5.1< 3.3<2.1< 4.0< 4.4< 4.3< 6.4< 2.7<3.1< 22.2< 2.0< 134a< 3.0< 4.3< 2.5< 2.5< 5.9< 2.3< 4.9< 4.3< 3.0< 1.8< 17.0<2.3 8 Result of reanalysis.

15-6 DUANE ARNOLD Table 16. Surface water, analysis for strontium-89 and strontium-90.

Collection:

Quarterly composites of monthly samples.Units: pCi/L Location D-49 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.Lab Code DSW-2399 DSW-3255 DSW-5135 DSW-7249 Sr-89 < 1.14 < 0.78 < 0.75 < 0.56 Sr-90 < 0.48 < 0.73 < 0.57 < 0.54 Location D-61 Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.Lab Code DSW-2400 DSW-3256 DSW-5136 DSW-7250 Sr-89 < 1.08 < 0.80 < 0.82 < 0.53 Sr-90 < 0.50 < 0.49 < 0.51 < 0.49 16-1 DUANE ARNOLD Table 17. Fish, analyses of edible portion for gamma-emitting isotopes.Collection:

Semiannually Units: pCi/g wet Location Upstream, D-49 Lab Code Date Collected Sample Type K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-1 06 Cs-i 34 Cs-137 Ce-141 Ce-1 44 DF- 3410 06-27-08 Buffalo 3.03 +/- 0.34< 0.010< 0.028< 0.008< 0.009< 0.021< 0.018< 0.015< 0.017< 0.118< 0.009< 0.006< 0.018< 0.045 DF- 3411 06-27-08 Buffalo 3.34 +/- 0.36< 0.014< 0.027< 0.012< 0.010< 0.009< 0.010< 0.019< 0.015< 0.139< 0.010< 0.009< 0.036< 0.076 DF- 5007 09-09-08 Carpsucker 2.99 +/- 0.35< 0.011< 0.036< 0.008< 0.011< 0.008< 0.018< 0.016< 0.015< 0.132< 0.009< 0.010< 0.042< 0.051 DF- 5008 09-09-08 Carp 2.57 +/- 0.34< 0.012< 0.040< 0.009< 0.014< 0,008< 0.023< 0.027< 0.025< 0.112< 0.009< 0.007< 0.027< 0.096 Location Downstream, D-61 Lab Code DF- 3412 DF- 3413 DF- 5009 DF- 5010 Date Collected 06-27-08 06-27-08 09-09-08 09-09-08 Sample Type Carpsucker Carp Carpsucker Carp K-40 3.61 +/- 0.35 1.18 +/- 0.38 3.23 +/- 0.40 2.71 +/- 0.36 Mn-54 < 0.009 < 0.013 < 0.012 < 0.014 Fe-59 < 0.035 < 0.022 < 0.036 < 0.038 Co-58 < 0.007 < 0.011 < 0.012 < 0.009 Co-60 < 0.009 < 0.008 < 0.011 < 0.010 Zn-65 < 0.012 < 0.020 < 0.024 < 0.024 Nb-95 < 0.011 < 0.016 < 0.016 < 0.012 Zr-95 < 0.018 < 0.024 < 0.024 < 0.026 Ru-1 03 < 0.014 < 0.009 < 0.009 < 0.012 Ru-106 < 0.094 < 0.051 < 0.084 < 0.107 Cs-1 34 < 0.010 < 0.011 < 0.011 < 0.011 Cs-I 37 < 0.009 < 0.009 < 0.006 < 0.008 Ce-141 < 0.021 < 0.028 < 0.039 < 0.040 Ce-1 44 < 0.097 < 0.075 < 0.088 < 0.093 17-1 DUANE ARNOLD Table 18. River sediment, analysis for gamma-emitting isotopes.Collection:

Semiannually Units: pCi/g dry Location D-50 Lab Code Date Collected K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-1 03 Ru-106 Cs-1 34 Cs-i 37 Ce-141 Ce-144 DBS- 2386 05-12-08 7.44 +/- 0.40< 0.011< 0.014< 0.010< 0.009< 0.015< 0.004< 0.017< 0.004< 0.052< 0.008< 0.010< 0.017< 0.071 DBS- 5771 10-21-08 7.40 +/- 0.59< 0.017< 0.059< 0.020< 0.015< 0.055< 0.023< 0.032< 0.023< 0.13< 0.013< 0.015< 0.039< 0.082 Location D-51 Lab Code Date Collected K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-1 03 Ru-106 Cs-1 34 Cs-1 37 Ce-1 41 Ce-144 DBS- 2387 05-12-08 8.16 +/- 0.44< 0.010< 0.026< 0.010< 0.009< 0.020< 0.008< 0.011< 0.008< 0.082< 0.010< 0.010< 0.019< 0.061 DBS- 5772 10-13-08 7.97 +/- 0.64< 0.017< 0.078< 0.022< 0.015< 0.059< 0.035< 0.031< 0.029< 0.15< 0.020< 0.018< 0.057< 0.10 18-1 DUANE ARNOLD Table 18. River sediment, analysis for gamma-emitting isotopes.Collection:

Semiannually Units: pCi/g dry Location D-107a Lab Code DBS- 2388 DBS- 5774 Date Collected 05-12-08 10-13-08 K-40 7.03 +/- 0.39 7.54 +/- 0.43 Mn-54 < 0.007 < 0.012 Fe-59 < 0.022 < 0.037 Co-58 < 0.011 < 0.016 Co-60 < 0.009 < 0.009 Zn-65 < 0.019 < 0.029 Nb-95 < 0.009 < 0.017 Zr-95 < 0.010 < 0.026 Ru-103 < 0.010 < 0.009 Ru-1 06 < 0.047 < 0.10 Cs-1 34 < 0.009 < 0.005 Cs-137 < 0.012 < 0.011 Ce-141 < 0.018 < 0.036 Ce-1 44 < 0.059 < 0.089 18-2 DUANE ARNOLD Table 19. Precipitation, analyses for gamma emitting isotopes.Collection:

Units: Location: Monthly pCi/L DAEC Date Collected Lab Code MRn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-1 37 Ba-1 40 La-140 01-10-08 DP- 132< 5.6< 10.4< 4.3< 4.8< 8.6< 6.5< 10.1< 7.9< 4.3< 5.8< 24.2< 3.2 02-28-08 03-13-08 04-24-08 05-22-08 06-30-08 DP- 818< 5.6< 6.8< 2.9< 6.5< 4.2< 3.2< 5.0< 4.9< 4.4<4.1< 14.9< 6.9 DP- 1039 DP- 2005 DP- 2488 DP- 3321< 4.1< 7.3< 3.1< 3.8< 5.1< 2.6< 7.1< 6.3< 1.9< 3.0* 8.2< 2.7< 2.6< 6.8* 2.3< 2.9< 6.9< 2.7< 5.1< 6.1< 3.7< 3.6< 11.4< 3.9< 4.0< 8.4< 2.6< 3.5< 3.8< 6.5< 5.8< 8.6< 4.2< 5.1< 32.9< 5.6< 4.4< 11.0< 4.2< 6.4< 4.9< 5.9< 10.1< 15.5* 5.1< 6.1< 41.5< 4.4 07-23-08 08-28-08 09-25-08 10-23-08 11-24-08 12-29-08 DP- 3855 DP- 4631 DP- 5259 DP- 5906 DP- 6747 DP- 7172 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-1 34 Cs-137 Ba-140 La-140* 2.9< 8.6< 2.7< 3.9< 5.0< 3.3< 6.4* 5.0* 1.8< 3.1< 16.5< 2.8< 4.2< 5.6< 3.8< 2.2< 5.8< 4.0< 7.1< 7.3* 3.8< 3.7< 18.9< 4.3< 4.1< 9.6< 3.2< 3.6< 4.4<3.1< 6.6< 6.9< 5.0< 4.0< 16.3< 2.0< 4.3< 10.2< 4.9< 2.8< 9.3< 6.9< 8.0< 9.9< 4.5<6.5< 29.2< 7.3 5.2 5.7 4.3 3.1 4.6 4.3 10.3 13.9 4.0 5.4 40.8 6.1< 2.8< 7.0< 3.3< 3.6< 2.7< 2.1< 6.1< 6.6< 3.7< 3.6< 22.3< 5.9 19-1 DUANE ARNOLD Table 20. Precipitation, analysis for tritium.Collection:

Quarterly composites of monthly samples.Units: pCi/L Location Duane Arnold Period 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.Lab Code DP-1 109 DP-3335 DP-5267 DP-7194 H-3 < 172 < 171 < 161 < 132 20-1 DUANE ARNOLD Table 21. Soil, analysis for strontium-90 and gamma-emitting isotopes.Collection:

Annually Units: pCi/g dry Location Lab Code Date Collected Sr-90 H-3 (pCi/L)K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-1 03 Ru- 106 Cs-1 34 Cs-137 Ce-141 Ce-144 D-1 5 DSO- 5907 10-20-08 0.059 +/- 0.017< 162 14.80 +/- 0.83< 0.028< 0.044< 0.018< 0.015< 0.052< 0.022< 0.045< 0.030< 0.22< 0.010 0.14 +/- 0.035< 0.061< 0.18 D-1 6 DSO- 5908 10-20-08< 0.016< 162 9.02 +/- 0.59< 0.022< 0.036< 0.019< 0.015< 0.036< 0.022< 0.016< 0.021< 0.11< 0.009 0.16 +/- 0.026< 0.043< 0.098 21-1 APPENDIX A SUPPLEMENTAL ANALYSES Appendix A, Supplemental Analyses A-1.1 Airborne particulates, duplicate analyses for gross beta.Collection:

Continuous, weekly exchange.Required LLD: 0.010 Date Volume Location Collected (M 3) Gross Beta (pCi/m 3)D-005 01-10-08 284 0.046 +/- 0.004 0-003 01-17-08 288 0.054 +/- 0.005 D-003 02-14-08 290 0.051 +/- 0.005 0-016 02-21-08 317 0.044 + 0.004 D-005 03-06-08 284 0.027 +/- 0.004 D-013 03-13-08 286 0.041 1 0.005 0-011 03-20-08 288 0.020 +/- 0.004 D-011 04-24-08 292 0.021 +/- 0.004 0-005 05-22-08 328 0.015 +/- 0.003 D-007 06-05-08 298 0,018 +/- 0.004 D-005 06-11-08 243 0.016 +/- 0.004 0-013 06-26-08 286 0.020 +/- 0.004 D-015 07-10-08 327 0.021 +/- 0.004 D-007 07-31-08 343 0.024 +/- 0.003 D-003 08-07-08 280 0.030 +/- 0.004 D-007 08-21-08 282 0.040 +/- 0.004 D-013 09-11-08 273 0.023 +/- 0.003 0-015 10-02-08 289 0.041 +/- 0.004 D-003 11-20-08 292 0.028 +/- 0.004 D-003 12-23-08 231 0.014 +/- 0.003 D-005 12-23-08 255 0.015 +/- 0.003 A-1.2 Duplicate Analyses, Surface water. Units: pCi/L Location D-50 D-50 D-50 D-51 Lab Code DSW- 813 DSW- 5110 DSW- 5905 DSW- 6743 Date Collected 02-27-08 09-21-08 10-22-08 11-24-08 H-3 < 179 < 161 < 154 < 152 Mn-54 < 3.6 < 3.0 < 2.1 < 1.4 Fe-59 < 4.1 < 4.5 < 4.3 < 3.7 Co-58 < 1.5 < 2.2 < 1.5 < 2.2 Co-60 < 2.4 < 2.2 < 2.4 < 2.2 Zn-65 < 2.9 < 5.0 < 3.7 < 3.6 Nb-95 < 2.8 < 2.4 < 2.5 < 1.8 Zr-95 < 3.5 < 4.8 < 5.0 < 4.5 1-131 < 5.8 < 3.8 < 5.2 < 4.4 Cs-134 < 2.1 < 2.7 < 2.8 < 2.2 Cs-137 < 1.9 < 1.6 < 3.0 < 2.7 Ba-140 < 17.5 < 10.6 < 17.4 < 16.2 La-140 < 1.9 < 2.2 < 1.9 < 1.6 A 1-1 Appendix A, Supplemental Analyses A-1.3 Duplicate Analyses, Precipitation, quarterly composite for tritium. Units: pCi/L Period 1st Qtr.Lab Code DP-1110 H-3 < 172 A-1.4 Duplicate Analyses, Milk. Units: pCi/L A-1.5 Duplicate Analyses, Well Water. Units: pCi/L Location MW-04A MW-04A D-54 Collection Date 03-19-08 06-24-08 09-17-08 Lab Code DWW-1173 DWW-3225 DWW-4977 Gross Beta 3.6 +/- 2.0 3.0 +/- 0.8 2.3 +/- 1.1 H-3 < 169 < 157 < 157 A-1.6 Duplicate Analyses, Air Particulates, Quarterly Composite Units: pCi/L Location D-7 Quarter 3rd Quarter 4th Quarter Lab Code DAP- 7261 DAP- 8900 Volume (m3) 3452 3685 Be-7 0.091 +/- 0.016 0.070 +/- 0.015 Mn-54 < 0.0006 < 0.0006 Fe-59 < 0.0011 < 0.0009 Co-58 < 0.0004 < 0.0006 Co-60 < 0.0004 < 0.0008 Nb-95 < 0.0012 < 0.0007 Zr-95 < 0.0015 < 0.0006 Ru-103 < 0.0010 < 0.0005 Ru-1 06 < 0.0022 < 0.0040 Cs-1 34 < 0.0005 < 0.0005 Cs-1 37 < 0.0004 < 0.0005 Ce-i 41 < 0.0019 < 0.0017 Ce-1 44 < 0.0052 < 0.0044 A 1-2 Appendix A, Supplemental Analyses A 1.7 Duplicate Analyses, Vegetation Units: pCi/gwet A 1.8 Duplicate Analyses, Sediment Units: pCi/gdry Location D-1 6 Lab Code DBS- 5773 Date Collected 10-13-08 K-40 7.68 +/- 0.58 Mn-54 < 0.024 Fe-59 < 0.057 Co-58 < 0.027 Co-60 < 0.018 Zn-65 < 0.046 Nb-95 < 0.024 Zr-95 < 0.040 Ru-i 03 < 0.023 Ru-106 < 0.16 Cs-134 < 0.014 Cs-137 < 0.021 Ce-I 41 < 0.045 Ce-144 < 0.077 A 1-3