NG-12-0214, Annual Radiological Environmental Operating Report

Annual Radiological Environmental Operating Report

ML12165A469
Person / Time
Site:	Duane Arnold
Issue date:	05/14/2012
From:	Wells P NextEra Energy Duane Arnold
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NG-12-0214
Download: ML12165A469 (112)

Text

NExTera m ENERY May 14, 2012 NG-12-0214 TS 5.6.2 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001 Duane Arnold Energy Center Docket No. 50-331 Renewed Op. License No. DPR-49

Subject:

2011 Annual Radiological Environmental Operating Report Please find as Enclosure 1 to this letter, a copy of NextEra Energy Duane Arnold, LLC's, (hereafter, NextEra Energy Duane Arnold) 2011 Annual Radiological Environmental Operating Report for the Duane Arnold Energy Center, pursuant to the requirements of ODAM Section 8.2.2 and Technical Specification Section 5.6.2.

This letter contains no new commitments nor does it revise any existing commitments.

Should you have any questions regarding this matter, please contact Mr. Steve Catron at (319) 851-7234.

Sincerely, Vice President, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC Enclosure cc: Regional Administrator, USNRC, Region III Resident Inspector, USNRC, Duane Arnold Energy Center Project Manager, USNRC, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Palo, IA52324

Enclosure 1 to NG-,12-0214 Duane Arnold Energy Center 2011 Annual Radiological Environmental Operating Report 110 Pages to follow

2011 Annual Radiological Environmental Operating Report Duane Arnold Energy Center Primary Contributor: ________-___ --

_'- Date: 5/7/-

Reviewed By: /, ý zo-t-ý- Date: 'I- 8Z-- WI_

Reviewed By:

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/(iu -I~i~ Date: -__

Li Approved By: Date: q /

X~AT Environmetl IC.

Awr'iiT Midwet Lboratory 700LandwehrRoad- Northbrook.IL.60062-2310 phone(847) 564-0700

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

ANNUAL REPORT - PART II DATA TABULATIONS AND ANALYSES January 1 to December 31, 2011 Prepared by ATI ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8001 Reviewed and Approved SA Coorlim Quality Assurance Mgr.

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

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

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TABLE OF CONTENTS 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 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ........................... 3 3.1 Program Design and Data Interpretation ................................................................ 3 3.2 Program Description ......................................................................................... 4 3.2.1 Environm ental M onitoring .............................................................................. 4 3.2.2 G roundwater Protection ................................................................................... 5 3.3 Program Execution ............................................................................................. 6 3.4 Laboratory Procedures ....................................................................................... 7 3.5 Program Modifications ....................................................................................... 7 4.0 RESULTS AND DISCUSSIO N .................................................................................. 8 4.1 Atm ospheric Nuclear Detonations and Nuclear Accidents ..................................... 8 4.2 REM P Program Findings .................................................................................... 8 4.3 Groundwater Protection Program Findings ...................................................... 11 5.0 TABLES AND FIG URES ......................................................................................... 12

6.0 REFERENCES

CITED ............................................................................................ 28 APPENDICES A Interlaboratory Com parison 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 Sum m ary of the Land Use Census ..................................................................... D-1 E Annual Radiation Dose Assessm ent .................................................................... E-1 iii

TABLE OF CONTENTS (continued)

PART II Paqe Data Tabulations and Analyses ...................................................................................... i iv

LIST OF TABLES No. Page 5.1 Characteristic Properties of Isotopes Quantified in Gamma-spectroscopic A n a lyse s .................................................................................................. . . 13 5.2 Sample Collection and Analysis Program 5.2a Sample Collection and Analysis Program (REMP) ........................................... 14 5.2b Sample Collection and Analysis Program (GWPP) ......................................... 16 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 P ro g ra m Deviatio ns ..................................................................................................... 21 5.7 Radiological Environmental Monitoring Program Summary ....................................... 22 5.8 Summary of Radiological Monitoring in Support of the Groundwater Protection Program ....................................................................................... 27 In addition, the following tables are included in the Appendices:

Appendix A A-1 Environmental Resource Associates (EPA DW substitute program) ....................... Al-1 A-2 Interlaboratorv Comparison Program Results, Thermoluminescent Dosim eters (T LD s) ...................................................................................... A2-1 A-3 In-house S piked S am ples ........................................................................................ A3-1 A-4 In-house "B lank" S am ples ........................................................................................ A4-1 A-5 In-house "Duplicate" Samples .............................................................................. A5-1 A-6 Department of Energy MAPEP comparison results ................................................. A6-1 A-7 Environmental Resource Associates (EML substitute program) .............................. A7-1 Attachment A: Acceptance criteria for spiked samples ............................................ A-2 Appendix C C-1 Effluent Concentration Limits for Radioactivity in Air and Water Above Background in Unrestricted Areas .............................................................. C-2 v

LIST OF FIGURES No. Paqe 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 Mile s .................................................................................................. . . 28 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, 2011. 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.

Tabulations of 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.

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2.0

SUMMARY

The Radiological Environmental Monitoring Program, as required by the U.S. Nuclar Regulatory Commission (NRC) Technical Specifications for the Duane Arnold Energy Center, is herein described.

Results for the year 2011 are summarized and discussed.

Trace levels of tritium in groundwater were reported from the sampling of monitoring wells within the Owner Controlled Area. REMP threshold reporting levels were not exceeded.

Program findings show only background levels of radioactivity in the environmental samples collected in the vicinity of the Duane Arnold Energy Center, with the exception of the period from March 24 through April 7, 2011. The detection of airborne iodine-131 is consistent with and attributable to radioactive elements released from the Fukushima Daiichi reactors or fuel pools in the aftermath of the March 11, 2011 Japanese earthquake and tsunami.

No effect on the environment is indicated in the areas surrounding the site of the Duane Arnold Energy Center.

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3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3.1 Program Design and Data Interpretation The purpose of the Radiological Environmental Monitoring Program at the Duane Arnold Energy Center (DAEC) is to assess the impact of the plant on its environment. For this purpose, samples are collected from the air, terrestrial, and aquatic environments and analyzed for radioactive content. In addition, ambient gamma radiation levels are monitored by thermoluminescent dosimeters (TLDs).

Sources of environmental radiation include the following:

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

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

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

An additional interpretive technique involves analyses for specific radionuclides present in the environmental samples collected from the DAEC site. The DAEC's monitoring program includes analyses for strontium-90 and iodine-131, which are fission products, and tritium, which is produced by cosmic rays, atmospheric nuclear detonations, and also by nuclear power plants.

Most samples are also analyzed for gamma-emitting isotopes with results for the following groups quantified: zirconium-95, cesium-137, and cerium-144. These three gamma-emitting isotopes were selected as radiological impact indicators because of the different characteristic proportions in which they appear in the fission product mix produced by a nuclear reactor and that produced by a nuclear detonation. Each of the three isotopes is produced in roughly equivalent amounts by a reactor: each constitutes about 10% of the total activity of fission products ten (10) days after reactor shutdown. On the other hand, ten (10) days after a nuclear explosion, the contributions of zirconium-95, cerium-144, and cesium-137 to the activity of the resulting debris are in the approximate ratio 4:1:0.03 (Eisenbud,1963). The other group quantified consists of niobium-95, ruthenium-103 and -106, cesium-134, barium-lanthanum-140, and cerium-141. These isotopes are released in small quantities by nuclear power plants, but to date their major source of injection into the general environment has been atmospheric nuclear testing. Nuclides of the next group, manganese-54, cobalt-58 and-60, and zinc-65, are activation products and arise from activation of corrosion products. They are typical components of nuclear power plant effluents, but are not produced in significant quantities by nuclear detonations. Nuclides of the final group, beryllium-7, which is of cosmogenic origin, and potassium-40, a naturally-occurring isotope, were chosen as calibration monitors and provide a comparison between levels of naturally occurring radionuclides and radionuclides that could be attributed to the operation of the plant.

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Program Desiqn 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 3.2.1 Environmental Monitoring The sampling and analysis schedule for the Radiological Environmental Monitoring Program (REMP) 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 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 nine locations. Airborne iodine is collected by continuous pumping through charcoal filters. Eight of the nine 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 50 locations. A TLD is placed at each location and exchanged and analyzed quarterly. The TLD locations are distributed as follows:

• Two on-site locations

• 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.

• Ten control locations greater than 3 miles from the DAEC stack.

• Four along sections of the Independent Spent Fuel Storage Installation (ISFSI) fenceline.

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 (downstream of Discharge) and also from Pleasant Creek Lake (D-99). 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.

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). The samples are analyzed for gross beta and tritium. If gross beta measures greater than 3 pCi/L, or positive tritium is detected, an analysis for gamma emitters is performed. If a gross beta measurement is greater than 7 pCi/L, or reactor by-product gamma emitters are detected, analyses for Fe-55, Sr-89, Sr-90, Ni-63 and alpha emitters are performed.

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Proqram Description (continued)

Milk is 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 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-96, D-109 and D-118). Grain, hay 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-131.

If cattle are slaughtered for home use, a meat sample is collected annually, during or immediately following a grazing period from animals grazing on-site. The sample is analyzed for gamma-emitting isotopes.

3.2.2 Groundwater Protection Non-potable water is collected from twelve on-site locations (MW-01 to MW-12). Two monitoring wells are sampled from each site, at shallow (A) and intermediate (B) depths, and analyzed for tritium. If the tritium concentration is greater than 1000 pCi/L, additional analyses for Sr-89, Sr-90, Fe-55, Ni-63, gross alpha and gamma-emitting isotopes are performed.

Precipitation is collected monthly from six on-site locations and analyzed for gamma-emitting isotopes. A quarterly composite is analyzed for tritium.

Soil samples are collected annually at the two on-site locations, D-15a and D-16. The samples are analyzed for strontium-90, tritium and gamma-emitting isotopes.

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

(1) Airborne Particulates / Airborne Iodine:

A partial air particulate / air iodine sample (133 M3) was collected at location D-7, for the week ending 01/13/11. Sampler run-time reported for 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.

Partial air particulate / air iodine samples were collected at locations D-6, D-1 1 and D-1 3, for the week ending 05/12/11. Storms in the area caused power outages.

A partial air particulate / air iodine sample (268 M3) was collected at location D-6, for the week ending 06/09/11. Power shut off during electrical storms. No air particulate / air iodine sample was available from location D-6 for the week ending 06/16/11. There was still no power to the station.

Air particulate / air iodine samples were not available at location D-40, for the week ending 07/07/11. The sampler was out of service due to voltage supply problems.

A partial air particulate / air iodine sample (164 M 3) was collected at location D-3, for the week ending 08/04/11. Run-time was reduced due to construction in area.

(2) Surface Water:

Surface water from location D-99 could not be sampled for the January 18, 2011 collection.

The lake was frozen.

(3) Thermoluminescent Dosimetry The second quarter, 2011 TLD at location D-37 was missing in the field. The TLD was replaced.

The third quarter TLD for location D-48 was not collected until the fourth quarter, 2011. The total exposure was 181 days, the data was prorated to a standard quarter.

(4) Well Water Samples from wells MW-01A, MW-03A, MW-05A, collected on July 30, 2011 and samples from wells MW-03A, MW-03B, MW-05A and MW-05B, collected on August 15, 2011 were lost in transit.

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3.4 Laboratory Procedures The Iodine-131 analyses in milk and water were made using a sensitive radiochemical procedure involving separation of iodine using an ion-exchange method, solvent extraction and subsequent beta counting. Levels of iodine-131 in vegetation and concentrations of airborne iodine-131 in charcoal samples were determined by gamma spectroscopy.

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

The gamma isotopic analysis provides a spectrum with an energy range from 80 to 2048 KeV.

Specific isotopes included in the gamma library 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 Be-7, 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 t'.a reliability of data obtained. Details of the QA Program are presented elsewhere (Environmental, Inc., Midwest Laboratory, 2011). The QA Program includes participation in Interlaboratory Comparison (crosscheck) Programs. Results obtained in crosscheck programs are presented in Appendix A.

3.5 Program Modifications Soil and precipitation sampling from onsite locations D-15a and D-16 was added to the Groundwater Protection Program. In addition, precipitation from five of the monitoring well locations (D-111, D-112, D-114, D-115 and D-116 are collected. The samples are analyzed for tritium and gamma emitting isotopes.

Six new pairs of on-site monitoring wells were added to the Ground Water Protection Program in 2011. The samples were analyzed for tritium. If the tritium concentration is greater than 1000 pCi/L, conditional analyses for gross alpha, gamma emitting isotopes, Fe-55, Ni-63, Sr-89 and Sr-90 are performed.

TLDs were placed along sections of the Independent Spent Fuel Storage Installation (ISFSI) fenceline. Four additional TLDS were added to the program in the second quarter of 2011.

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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 2011 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 The Fukushima Daiichi nuclear accident occurred on March 11, 2011, releasing large amounts of radioactive isotopes into the atmosphere and Pacific Ocean. Positive iodine-131, cesium-1 34 and cesium-137 activities were detected in environmental background samples from March through May. The accident, rated seven on the International Nuclear Event Scale (INES) compares with Chernobyl, rated level seven, and Three Mile Island rated level five.

4.2 Program Findings Results obtained show background levels of radioactivity in the environmental samples collected outside of the Owner Controlled Area in 2011. The trace levels of strontium-90 and cesium-137, still measurable in soil and sediments are attributed to deposition of fallout from previous decades.

Tritium was identified in some groundwater samples collected within the Owner Controlled Area. In no instances were REMP threshold reporting levels exceeded. (ODAM, Table 6.3-3)

Airborne Particulates The average annual gross beta concentrations in airborne particulates were almost identical at indicator and control locations (0.030 and 0.029 pCi/m 3 , respectively) and similar to levels observed from 1995 through 2011. The results are tabulated below.

Year Indicators Controls Year Indicators Controls Concentration (pCi/m3) Concentration (pCi/m 3 )

1997 0.023 0.023 2005 0.031 0.031 1998 0.024 0.024 2006 0.029 0.027 1999 0.026 0.027 2007 0.031 0.031 2000 0.026 0.027 2008 0.029 0.029 2001 0.026 0.026 2009 0.031 0.030 2002 0.027 0.027 2010 0.028 0.028 2003 0.029 0.029 2011 0.030 0.029 2004 0.028 0.028 2012 0.030 0.029 Average annual gross beta concentrations in airborne particulates.

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4.2 Program Findings, Airborne Particulates (continued)

Gamma spectroscopic analysis of quarterly composites of air particulate filters yielded similar results for indicator and control locations. Beryllium-7, which is produced continuously in the upper atmosphere by cosmic radiation (Arnold and AI-Salih, 1955) was detected in all samples, with an average activity of 0.071 pCi/m 3 for all locations. All other gamma-emitting isotopes were below their respective LLD limits.

Airborne Iodine Following the Fukushima Daiichi accident, measurable radioiodine was detected in weekly collections of activated charcoal cartridges. For the weeks ending March 24, March 31 and April 7, 2011, activity for all locations averaged 0.14, 0.076 and 0.082 pCi/m 3 , respectively.

Measurements for the rest of the year were below the required limit of detection of 0.070 pCi/m 3 .

Ambient Radiation (TLDs)

At ten control locations, TLD readings averaged 16.5 mR/quarter. At locations within a half mile, one mile and three mile radius of the stack, the measurements averaged 18.1, 19.0 and 16.2 mR/quarter, respectively. The two on-site locations D-15 and D-16 averaged 16.9 mR/quarter. Four TLDS were added to the program in the second quarter of 2011. The TLDs, placed directionally along the ISFSI fenceline, averaged 15.0 mR/quarter. The average for all locations was 17.3 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 radiat!on and cosmogenic radionuclides contribute 8.0 mrad/quarter for a total average of 19.5 mrad/quarter. No plant effect is indicated.

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 selective metabolism of the cow. The common exceptions are radioisotopes of potassium, cesium, strontium, barium, and iodine (National Center for Radiological Health, 1968).

In summary, milk data for 2011 show no radiological effects of plant operation.

Ground Water (potable)

The annual mean for gross beta activity 2.6 pCi/L, similar to levels observed from 1991 through 2010. The location with the highest mean was D-58, a farm 1.0 mile distant from the plant. Tritium activity measured below the LLD of 151 pCi/L in all samples.

No effect from plant operation is indicated.

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4.2 Progqram Findings (continued)

Vegetation Iodine-131 concentrations in broadleaf vegetation were below the LLD level of 0.037 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.

Surface Water Surface water was tested for tritium and gamma emitting isotopes in fifty-nine samples from five locations. No measurable tritium activity was detected above an LLD of 163 pCi/L. Gamma-emitting isotopes were below detection limits.

An analysis for 1-131 was performed on samples from locations D-49 (control) and D-61 (0.5 mi.

downstream, indicator). All samples tested below detection limits.

Quarterly composites were also prepared from the samples collected at locations D-49 and D-61 and tested for strontium-89 and strontium-90. All samples tested below detection limits.

No plant effect on surface water is indicated.

Fish Fish were collected in May and August, 2011, 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 (3.21 and 3.34 pCi/g wet, respectively). No plant effect on the fish population is indicated.

River Sediments River sediments were collected in June and November, 2011, and analyzed for gamma-emitting isotopes. Potassium-40 activity ranged from 5.43-10.74 pCi/g dry weight and averaged 8.33 pCi/g dry weight.

Cs-137 was detected at both indicator and control locations and averaged 0.037 and 0.10 pCi/g dry, respectively. The measurements are similar to levels observed from 1991 through 2010, trace cesium activity is generally attributable to deposition of fallout from previous decades.

All other gamma-emitting isotopes were below detection limits. There is no indication of a plant effect.

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4.3 Ground Water Protection Proaram There were no sample analyses results that warranted communications to State and Local Stakeholders.

Refer to Part II, Appendix A for results of additional/ancillary samples collected in support of the Nuclear Industry Ground Water Protection Initiative.

Soil Strontium-90 was detected at both indicator locations and averaged 0.033 pCi/g dry. Cesium-137 activity averaged 0.12 pCi/g dry weight. Strontium-90 and cesium-137 activities are similar or less than levels observed from 1991 through 2010, these levels are generally attributable to deposition of fallout from previous decades.

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

The soil was distilled and analyzed for tritium. No tritium was detected above a background level of 150 pCi/L.

Ground Water (Site Monitoring Wel!s)

Twelve on-site monitor!ng wells (six shallow and six intermediate depth) were sampled in 2011 and analyzed for tritium. Twelve additional wells (six shallow and six intermediate depth) were added to the Ground Water Protection Program in 2011.

Tritium was detected in twenty-five of eighty-six samples tested, most activity was observed in samples taken from shallow wells. Measurements ranged from 2087 pCi/L to less than LLD. The highest average activity (1915 pCi/L) was measured in samples collected from the intermediate depth well, MW-08B.

Precipitation Precipitation from the on-site location D-1 6 and five monitoring well locations (D-1 11, D-1 12, D-114, D-1 15 and D-1 16) were collected. The samples were analyzed for tritium and gamma emitting isotopes.

Low levels of tritium were detected in fourteen of sixty-nine samples tested. The mean activity was 475 pCi/L, ranging from 186 to 1549 pCi/L.

Composite samples were prepared for locations D-111, 112, 114, 115 and D-116 and monthly samples from D-16 were analyzed by gamma spectroscopy. No gamma-emitting isotopes were detected.

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5.0 TABLES AND FIGURES 12

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

Designation Comment Isotope Half-lifea Naturally Occurring A. Cosmogenic Produced by interaction of cosmic rays Be-7 53.2 d with atmosphere B. Terrestrial Primordial K-40 1.26 x 109 y IL. 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-1 06 368.2 d Cs-134 2.061 y Cs-137 30.174 y Ce-141 32.5 d Ce-144 284.31 d III. 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 Half-lives are taken from Appendix E of Environmental Quarterly, 1 January 1978, EML-334 (U. S. Department of b Energy, 1978).

Includes fission-product daughters.

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Table 5.2a Sample collection and analysis program (REMP).

Sampling Location a Exposure Pathway and/or Sample Description Sampling and Collection Type and Frequency Sample Type Point Frequency of Analysis b 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 7 Shellsburg week or as required by dust isotopic analysis on each 11 Toddville loading, sample having gross beta 13 Alburnett (C) activity greater than ten times 15 On-site North the yearly mean of the control 16 On-site South samples.

40 Wickiup Hill 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 5 Palo sampler with sample iodine-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 40 Wickiup Hill Ambient 1-3, 5-8, Controls One dosimeter Read gamma radiation dose Radiation 10, 11, 13 continuously at each quarterly.

location.

Indicators Dosimeters are changed at 15-23, -< 0.5 mi. of Stack least quarterly.

28-32, 82-86, 91 43-48 < 1.0 mi. of Stack 33-42 < 3.0 mi. of Stack 161-164 ISFSI Fenceline 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 Locations 49 and 61, analyses Lake for low level 1-131. Quarterly Composites for Sr-89, Sr-90.

14

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

Sampling Location a Exposure Pathway and/or Sample Description Sampling and Collection Type and Frequency Sample Type Point Frequency of Analysis b Ground Water 53 Treated Municipal Grab sample at least Analysis for gross beta and tritium (potable) 54 Inlet to Municipal Water once per quarter. on quarterly samples. If gross beta Treatment System measures > 3 pCi/L, OR tritium concentration measures > MDA, 55 On-site well perform gamma isotopic analyses.

57, 58 Wells off-site and If reactor by-product gamma 72 (C) within 4 km of DAEC emitters are identified, OR if gross beta measures > 7 pCi/L, analyze for Fe-55, Ni-63, Sr-89, Sr-90 and alpha emitters.

Vegetation 16, 57, 58, Farms that raise food Annually at harvest time. Gamma isotopic analysis of edible 72, 96, crops. One sample of each: portions.

109, 118 grain, green leafy, and forage. At least one 1-131 analysis on broadleaf 108 (C) sample should be vegetation.

broadleaf 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 Milk c 108 (C) Control Farm near At least once per two Gamma isotopic and iodine-131 Watkins, Iowa weeks during the grazing analyses of each sample.

season.

110 Dairy Farm 7.8 mi. SW At least once per month during the non-grazing season.

River 50 Plant Intake (C) At least once every six Gamma isotopic analysis of each Sediment 51 Plant Discharge months. sample.

107a North Drainage Ditch (on-site)

Meat ' On-site Annually Gamma Isotopic 15

Table 5.2b Sample collection and analysis program, (GWPP).

Sampling Location a Exposure Pathway and/or Sample Description Sampling and Collection Type and Frequency Sample Type Point Frequency of Analysis b On-site Ground On-site wells: Grab sample at least Each sample is analyzed for Water 111 MW-01A, B (SSE) once per quarter. tritium. If the tritium concentration (Monitoring 112 MW-02A, B (ESE) is greater than 1000 pCi/L, Wells) 113 MW-03A, B (NW) conditional analyses for Fe-55, Ni-114 MW-04A, B (S) 63, Sr-89, Sr-90, gross alpha and 115 MW-05A, B (SSW) gamma emitters are performed.

116 MW-06A, B (NE) 127 MW-07A, B Prot. Area Conditional analyses may also be 128 MW-08A B Prot. Area performed at the request of the 129 MW-09A, B Prot. Area DAEC 130 MW-1 OA, B Prot. Area 131 MW-11A, B (S) 132 MW-12A, B (SE)

Precipitation 16 On-site Monthly Gamma isotopic and tritium on all samples.

Tritium on quarterly composites.

Soil 15a, 16 On-site Annually Gamma Isotopic, Sr-90 and tritium a (C) denotes control location. All other locations are indicators.

bGamma isotopic analysis and analysis for gamma-emitting nuclides refer to high resolution gamma ray spectrum analysis.

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

dOnly 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 Cedar Rapids 12.9 mi SE D-2 Marion 10.5 mi ESE D-3 Hiawatha 6.7 mi SE D-5 Palo 2.8 mi SSW D-6 Center Point 6.0 mi N D-7 Shellsburg 4.9 mi W D-8 Urbana 9.3 mi NNW D-1 0 Atkins 8.5 mi SSW D-11 Toddville 3.1 mi E D-1 3 Alburnett 9.0 mi ENE D-15 On-site, North-Northwest 0.7 mi NNW D-15a On-site, North-Northwest 0.3 mi NNW D-1 6 On-site, South-Southeast 0.3 mi SSE D-17 On-site, N 0.7 mi N D-18 On-site, NNE 0.4 mi NNE D-19 On-site, NE 0.4 mi NE D-20 On-site, ENE 0.3 mi ENE D-21 On-site, ENE 0.3 mi ENE D-22 On-site, ESE 0.3 mi ESE D-23 On-site, SE 0.3 mi SE D-28 On-site, WSW 0.5 mi WSW D-29 On-site, W 0.4 mi W D-30 On-site, WNW 0.4 mi WNW D-31 On-site, NW 0.5 mi NW D-32 On-site, NNW 0.7 mi NNW D-33 3 mile ring N 2.7 mi N D-34 3 mile ring NNE 2.4 mi NNE D-35 3 mile ring NE 1.7 mi NE D-36 3 mile ring ENE 2.2 mi ENE D-37 3 mile ring E 1.8 mi E D-38 3 mile ring ESE 2.0 mi ESE D-39 3 mile ring SE 1.6 mi SE D-40 3 mile ring SSE 1.5 mi SSE D-41 3 mile ring S 3.5 mi S D-42 3 mile ring SSE 2.7 mi SSE D-43 1 mile ring SSW 1.0 mi SSW D-44 1 mile ring WSW 1.0 mi WSW D-45 1 mile ring W 0.9 mi W D-46 1 mile ring WNW 1.0 mi WNW D-47 1 mile ring NW 1.1 mi NW D-48 1 mile ring NNW 1.0 mi NNW D-49 Lewis Access, upstream of DAEC 4.2 mi NNW 17

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

Sampling Location Code Location Description Distance and Direction from Site Stack D-50 Plant Intake . 0.4 mi SE D-51 Plant Discharge 0.4 mi SE D-53 Treated Municipal Water 8.6 mi SE D-54 Inlet, Municipal Water Treatment System 8.6 mi SE D-55 Production Well On-site D-57 Farm (Off-site Well) 1.0 mi W D-58 Farm (Off-site Well) 1.0 mi WSW-SW D-61 Downstream of plant discharge 0.4 mi SSE D-72 Farm 2.0 mi SSW D-82 On-site, SSE 0.4 mi SSE D-83 On-site, SSE 0.4 mi SSE D-84 On-site, S 0.4 mi S D-85 On-site, SSW 0.4 mi SSW D-86 On-site, SW 0.5 mi SW D-91 On-site, NNW 0.7 mi NNW D-96 Farm 7.1 mi SSW D-99 Pleasant Creek Lake 2.4 mi WNW D-107 Sewage Plant Effluent On-site D-107a North Drainage Ditch On-site D-108 Farm 16.0 mi. SW D-109 Farm 3.7 mi. SW D-1 10 Farm 7.9 mi. SW D-111 Monitoring wells, MW-01A, B On-site, SSE D-112 Monitoring wells, MW-02A, B On-site, ESE D-113 Monitoring wells, MW-03A, B On-site, NW D-114 Monitoring wells, MW-04A, B On-site, S D-115 Monitoring wells, MW-05A, B On-site, SSW D-116 Monitoring wells, MW-06A, B On-site, NE D-118 Farm 1.45 mi. NW D-127 Monitoring wells, MW-07A, B On-site, N of CST Pit D-128 Monitoring wells, MW-08A, B On-site, CAD Shack D-129 Monitoring wells, MW-09A, B On-site, SE corner CST Pit D-130 Monitoring wells, MW-1 OA, B On-site, SW corner CST Pit D-131 Monitoring wells, MW-1 1A, B On-site, SE D-132 Monitoring wells, MW-1 2A, B On-site, S D-161 ISFSI Fence East On-site D-162 ISFSI Fence South On-site D-163 ISFSI Fence West On-site D-164 ISFSI Fence North On-site 18

Table 5.4 Type and Frequency of collection.

Location Weekly Monthly Quarterly Semiannually ll D-1 TLD D-2 TLD D-3 AP, Al TLD D-5 AP, Al TLD 0-6 AP, Al TLD D-7 AP, Al TLD D-8 TLD D-10 TLD D-11 AP, Al TLD 0-13 AP, Al TLD D-15 AP, Al TLD D-15A SO 0-16 AP, Al P TLD SO, G Q-17 to D-23 TLD D-28 to D-39 TLD D-40 AP, Ai TLD 0-41 to D-48 TLD D-49 SW F D-50 SW BS D-51 SW BS 0-53 WW D-54 WW D-55 WW D-57 WW G 0-58 WW G D-61 SW F D-72 WW G 0-82 to D-86 TLD Q-91 TLD D-96 G D-99 SW D-107 SW D-107A BS D-108 Ml* G D-109 G 0-110 Ml*

0-111 to D-116 WW D-111,112,114,115,116 P 0-118 G 0-127 to D-132 WW 0-161 to D-164 TLD On-site ME

• 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. Program Deviations, Duane Arnold Energy Center.

Sample Collection Date Type Analysis Location(s) or Period Comments AP/AI Gross Beta / Gamma D-7 1-13-11 Low volume, sampler run-time 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.

AP/AI Gross Beta / Gamma D-6, 13 5-12-11 Reduced run-times due to electrical storms.

AP/Al Gross Beta / Gamma D-6 6-9-11 Reduced run-time due to electrical storms.

AP/AI Gross Beta / Gamma D-6 6-16-11 Power out due to electrical storms.

AP/AI Gross Beta / Gamma D-40 7-7-11 Out of service, voltage supply problems.

AP/AI Gross Beta / Gamma D-3 8-4-11 Reduced run-time due to construction in area.

SW H-3 / Gamma D-99 1-18-11 No sample; water frozen.

TLD Ambient Gamma D-37 2 n, Qtr. 2011 TLD missing in the field.

TLD Ambient Gamma D-48 3r Qtr. 2011 Not collected until 4" Qtr., 2011.

WW H3 D-111, D-113 7-30-11 MW-01A, MW-03A, MW-05A D-115 Samples Lost in Transit WW H3 D-113, D-115 8-15-11 MW-03A, MW-03B, MW-05A, MW-05B Samples Lost in Transit In no instance did missed analyses affect minimum sampling requirements as specified in the ODAM.

21

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Linn, Iowa Reporting Period January-December, 2011 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD b Mean (F) c Mean (F) C Mean (F) Routine (Units) Analyses a Range C Location d Range c Range C Results Airborne Pathway Airborne GB 466 0.003 0.030 (413/414) D-16, On-site 0.031 (52/52) 0.029 (52/52) 0 Particulates (0.008-0.067) 0.5 mi. SSE (0.011-0.065) (0.011-0.049)

(pCi/ms) GS 36 Be-7 0,020 0.070 (32/32) D-3, Hiawatha 0.077 (4/4) 0.072 (4/4) 0 (0.040-0.104) 7 mi. SE (0.071-0.088) (0.049-0.089)

Mn-54 0.0010 < LLD < LLD 0 Fe-59 0.0030 < LLD < LLD 0 Co-58 0.0012 < LLD < LLD 0 Co-60 0.0012 < LLD < LLD 0 Zn-65 0.0022 < LLD < LLD 0 Nb-95 0.0020 < LLD < LLD 0 Zr-95 0.0023 < LLD < LLD 0 Ru-103 0.0016 < LLD < LLD 0 Ru-106 0.0096 < LLD < LLD 0 Cs-134 0.0014 < LLD < LLD 0 Cs-137 0.0012 < LLD < LLD 0 Ce-141 0.0036 < LLD < LLD 0 Ce-144 0.0056 < LLD < LLD 0 Airborne Iodine 1-131 466 0.030 0,099 (24/414) D-11, Toddville 0.107 (3/3) 0.091 (3/52) 0 (pCi/mi ) (0.059-0.16) (0.080-0.14) (0.066-0.13)

Direct Radiation TLDs (mR/quarter)

Control Locations Gamma 40 1.0 None D-8,Urbana 20.3 (4/4) 16.5 (40/40) 0 10 mi. NW (17.8-22.0) (13.0-22.0)

Within 0.5 mi. Gamma 80 1.0 18.1 (80/80) D-29,On-site 21.9 (4/4) None 0 of Stack (14.1-23.7) 0.5 mi. W (19.7-23.7)

Within 1.0 mi. Gamma 23 1.0 19.0 (23/23) D-48 20.5 (3/3) None 0 of Stack (14.4-22.4) 1 mi. NNW (18.8-22.2)

Within 3.0 mi. Gamma 39 1.0 16.2 (39/39) D-39 17.4 (4/4) None 0 of Stack (14.0-18.4) 3 mi. SE (16.2-17.8)

ISFSI border Gamma 12 1.0 15.0 (12112) D-162 16.6 (3/4) None 0 (12.6-17.2) ISFSI Fence (15.8-17.2) 22

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Linn, Iowa Reporting Period January-December, 2011 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD b Mean (F)c Mean (F)' Mean (F)' Routine (Units) Analyses' _Range' Location d Range C Rangec Results Waterborne Pathway Ground Water, GB 24 1.4 2.6 (8/20) D-58, Farm 3.7 (4/4) < LLD 0 potable (pCi/L) (1.4-4.6) 1 mi. WSW-SW (3.2-4.6)

H-3 24 151 < LLD < LLD 0 Surface Water H-3 59 163 < LLD - < LLD 0 (pCi/L) 1-131 24 0.4 < LLD - < LLD 0 Sr-89 8 0.8 < LLD - < LLD 0 Sr-90 8 0.6 < LLD - < LLD 0 GS 59 Mn-54 5.5 < LLD - < LLD 0 Fe-59 8.8 < LLD - < LLD 0 Co-58 4.7 < LLD - < LLD 0 Co-60 5.8 < LLD - < LLD 0 Zn-65 11.7 < LLD - < LLD 0 Nb-95 9.6 < LLD - < LLD 0 Zr-95 9.1 < LLD - < LLD 0 1-131 11.6 < LLD - < LLD 0 Cs-134 5.1 < LLD - < LLD 0 Cs-137 6.4 < LLD - < LLD 0 Ba-140 26.4 < LLD - < LLD 0 La-140 6.6 < LLD - < LLD 0 Sediments GS 6 (pCi/g dry) K-40 1.0 7.89 (4/4) D-50, 9.20 (2/2) 9.20 (2/2) 0 (5.43-9.36) Plant Intake (7.66-10.74) (7.66-10.74)

Mn-54 0.024 < LLD - < LLD 0 Fe-59 0.047 < LLD - < LLD 0 Co-58 0.026 < LLD - < LLD 0 Co-60 0.018 < LLD - < LLD 0 Zn-65 0.056 < LLD - < LLD 0 Nb-95 0.038 < LLD - < LLD 0 Zr-95 0.050 < LLD - < LLD 0 Ru-103 0.025 < LLD - < LLD 0 Ru-106 0.18 < LLD - < LLD 0 Cs-134 0.022 < LLD - < LLD 0 Cs-137 0.016 0.037 (2/4) D-50, 0.10 (1/2) 0.10 (1/2) 0 (0.030-0.044) Plant Intake Ce-141 0.072 < LLD < LLD 0 Ce-144 0.19 < LLD < LLD 0 23

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Linn, Iowa Reporting Period January-December, 2011 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD b Mean (F)c Mean (F)' Mean (F)c Routine (Units) Analyses' Rangec Location d Range' Range c Results Ingestion Pathway Milk 1-131 42 0.5 < LLD < LLD 0 (pCi/L)

GS 42 K-40 100 1364 (21/21) D-108, Farm 1428 (21/21) 1428 (21/21) 0 (1307-1426) 17.3 mi. SW (1284-1591) (1284-1591)

Cs-134 5 < LLD - < LLD 0 Cs-137 5 < LLD - < LLD 0 Ba-140 60 < LLD - < LLD 0 La-140 5 < LLD - < LLD 0 Broadleaf 1-131 4 0.037 < LLD - < LLD 0 Vegetation (pCi/g wet) GS 4 K-40 0.5 4.02 (4;4) D-108, Farm 5.00 (1/1) 5.00 (1/1) 0 (2.60-5.00) 17.3 mi. SW Mn-54 0.024 < LLD - < LLD 0 Co-58 0.021 < LLD - < LLD 0 Co-60 0.020 < LLD - < LLD 0 Zn-65 0.032 < LLD - < LLD 0 Nb-95 0.022 < LLD - < LLD 0 Zr-95 0.031 < LLD - < LLD 0 Ru-1 03 0.021 < LLD - < LLD 0 Ru-106 0.23 < LLD - < LLD 0 Cs-1 34 0.022 < LLD - < LLD 0 Cs-137 0.019 < LLD - < LLD 0 Ce-141 0.042 < LLD - < LLD 0 Ce-144 0.16 < LLD - < LLD 0 Vegetation GS 12 (Grain and Forage) K-40 0.5 5.56 (8/8) D-108, Farm 13.75 (3/3) 13.75 (3/3) 0 (pCi/g wet) (2.08-14.17) 17.3 mi. SW (3.16-23.80) (3.16-23.80)

Mn-54 0.021 < LLD < LLD 0 Co-58 0.026 < LLD < LLD 0 Co-60 0.025 < LLD - < LLD 0 Zn-65 0.094 < LLD - < LLD 0 Nb-95 0.031 < LLD - < LLD 0 Zr-95 0.058 < LLD - < LLD 0 Ru-103 0.018 < LLD - - < LLD 0 Ru-106 0.20 < LLD - - < LLD 0 Cs-1 34 0.025 < LLD - - < LLD 0 Cs-137 0.031 < LLD - - < LLD 0 Ce-141 0.056 < LLD - - < LLD 0 Ce-144 0.23 < LLD - - < LLD 0 24

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Linn, Iowa Reporting Pe.riod January-December, 2011 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD b Mean (F) ' Mea n (F) c Mean (F) ' Routine (Units) Analyses' Range' Location d Rangec Rangec Results Ingestion Pathway (cont.)

Fish GS 8 (pCi/g wet) K-40 1.0 3.21 (4/4) D-49, Upstream, 3.34 (4/4) 3.34 (4/4) 0 (2.73-3.76) 4.0 mi. NNW (2.90-3.64) (2.90-3.64)

Mn-54 0.015 < LLD < LLD 0 Fe-59 0.040 < LLD < LLD 0 Co-58 0.016 < LLD - < LLD 0 Co-60 0.012 < LLD - < LLD 0 Zn-65 0.021 < LLD - < LLD 0 Nb-95 0.025 < LLD - - < LLD 0 Zr-95 0.033 < LLD - - < LLD 0 Ru-103 0.019 < LLD - - < LLD 0 Ru-106 0.10 < LLD - -< LLD 0 Cs-134 0.017 < LLD - - < LLD 0 Cs-137 0.014 < LLD - - < LLD 0 Ce-141 0.031 < LLD - - < LLD 0 Ce-144 0.093 < LLD - - < LLD 0 Groundwater Protection Program Soil Sr-90 2 0.023 0.033 (2/2) D-15a, On-site 0.039 (1/1) None 0 (pCi/gwet) (0.026-0.039) 0.5 mi. NW H-3 (pCi/L) 2 150 < LLD - None 0 GS 2 K-40 0.5 12.28 (2/2) D-15a, On-site 15.08 (1/1) None 0 (9.49-15.08) 0.5 mi. NW Mn-54 0.032 < LLD - None 0 Fe-59 0.034 < LLD - None 0 Co-58 0.018 < LLD - None 0 Co-60 0.014 < LLD - None 0 Zn-65 0.048 < LLD - None 0 Nb-95 0.023 < LLD - None 0 Zr-95 0.039 < LLD - None 0 Ru-1 03 0.030 < LLD - None 0 Ru-106 0.149 < LLD - None 0 Cs-1 34 0.021 < LLD - None 0 Cs-137 0.060 0.12 (2/2) D-15a, On-site 0.14 (1/1) None 0 (0.09-0.14) 0.5 mi. NW Ce-141 0.064 < LLD - None 0 Ce-144 0.17 < LLD - None 0 25

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Duane Arnold Energy Center Docket No. 50-331 Location of Facility Linn, Iowa Reporting Period January-December, 2011 (County, State)

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD b Mean (F)' Mean (F) C Mean (F)' Routine (Units) Analyses'a Range' Location d Rangec Rangec Results Groundwater Protection Program ncont.)

Ground Water GB 12 2.1 2.9 (5/12) MW-06A, 4.2 (1/1) None 0 Monitoring (2.2-4.2) Onsite, NE Wells (pCi/L) H-3 86 174 947 (25/86) MW-08B, 1915 (5/5) None 0 (175-2087) Onsite (1773-2087)

Gr. Alpha 4 7.1 14.5 (1/4) MW-12A, Onsite 14.5 (1/4) None Sr-89 11 13.4 < LLD None Sr-90 11 7.9 < LLD None Fe-55 11 940 < LLD None Ni-63 11 137 < LLD None Precipitation H-3 69 163 475 (14/69) D-114, On-site 635(1/11) None 0 (186-1549)

(pCi/L) GS 12 Mn-54 7.5 < LLD - None 0 Fe-59 13.2 < LLD - None 0 Co-58 7.6 < LLD - None 0 Co-60 6.9 < LLD - None 0 Zn-65 11.8 < LLD - - None 0 Nb-95 8.8 < LLD - - None 0 Zr-95 12.9 < LLD - - None 0 1-131 15.4 < LLD - - None 0 Cs-134 7.5 < LLD - - None 0 Cs-137 7.5 < LLD - - None 0 Ba-140 54.3 < LLD - - None 0 La-140 10.0 < LLD - - None 0 a GB = Gross beta; GS = Gamma spectroscopy b LLD = Nominal lower limit of detection based 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.

a Non-routine results are those which exceed ten times the control station value for the location. If a control station value is not available, the result is considered non-routine ifit 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 through 2012. Environmental Radiological Monitoring Program for the Duane Arnold Energy Center, Annual Report - Part II, Data Tabulations and Analyses, January - December, 2001 - 2011.

1984 to 2000. (formerly Teledyne Brown Engineering, Environmental Services, Midwest Laboratory)

Environmental Radiological Monitoring Program for the Duane Arnold Energy Center, Annual Report

- Part II, Data Tabulations and Analyses, January - December, 1983 - 1999.

1982 to 1984. (formerly Hazleton Environmental Sciences Corporation) Environmental Radiation Monitoring for the Duane Arnold Energy Center, Annual Report - Part II, Data Tabulations and Analyses, January - December 1981 - 1983.

2009. Quality Assurance Program Manual, Rev. 2, 10 November 2009.

2009. Quality Control Procedures Manual, Rev. 2, 08 July 2009.

2009. Quality Control Program, Rev. 2, 12 November 2009.

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.

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

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

14,  ! Environmental, Inc.

Midwest Laboratory 700 Landwehr Road o Northbrook,IL 60062-2310 phone (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 through December, 2011

Appendix A Interlaboratory Comparison Progqram 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.

Table A-2 lists results for thermoluminescent dosimeters (TLDs), via International Intercomparison of Environmental Dosimeters, when available, and interna: 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 vaIL Gross beta < 100 pCi/liter 5.0 pCi/liter

> 100 pCi/liter 5% of known value Tritium < 4,000 pCi/liter +/- lu =

169.85 x (known)00 933

> 4,000 pCi/liter 10% of known value Radium-226,-228 > 0.1 pCi/liter 15% of known value Plutonium > 0.1 pCi/liter, gram, or sample 10% of known value Iodine-1 31, < 55 pCi/liter 6 pCi/liter Iodine-1 2 9 b > 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 0 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 Result b Result C Limits Acceptance STW-1243 04/04/11 Sr-89 68.2 +/- 5.8 63.2 51.1 -71.2 Pass STW-1243 04/04/11 Sr-90 44.3 +/- 2.4 42.5 31.3 -48.8 Pass STW-1244 04/04/11 Ba-133 69.8 +/- 3.9 75.3 63.0 -82.8 Pass STW-1244 04/04/11 Co-60 87.9 +/- 3.8 88.8 79.9 - 100.0 Pass STW-1244 04/04/11 Cs-134 69.5 +/- 3.7 72.9 59.5 - 80.2 Pass STW-1244 04/04/11 Cs-137 77.9 +/- 5.3 77.0 69.3 - 87.4 Pass STW-1244 04/04/11 Zn-65 105.2 +/- 8.4 98.9 89.0 -118.0 Pass STW-1245 04/04/11 Gr. Alpha 41.5 +/- 2.3 50.1 26.1 -62.9 Pass STW-1245 04/04/11 Gr. Beta 48.9 +/- 1.8 49.8 33.8 - 56.9 Pass STW-1246 04/04/11 1-131 26.6 +/- 1.7 27.5 22.9 - 32.3 Pass STW-1247 04/04/11 Ra-226 13.2 +/- 0.6 12.1 9.0 - 14.0 Pass STW-1247 04/04/11 Ra-228 11.2 +/-+0.6 11.6 7.6 - 14.3 Pass STW-1247 04/04/11 Uranium 36.4 +/- 0.6 39.8 32.2 - 44.4 Pass STW-1248 04/04/11 H-3 10322 +/- 285 10200.0 8870 -11200 Pass STW-1256 10/07/11 Sr-89 68.7 +/- 6.0 69.7 56.9 - 77.9 Pass STW-1256 10/07/11 Sr-90 36.9 +/- 2.4 41.1 30.2 - 47.2 Pass STW-1257 10/07/11 Ba-133 88.2 +/- 7.8 96.9 81.8 - 106.0 Pass STW-1257 10/07/11 Co-60 116.5 +7.1 119.0 107.0 - 133.0 Pass d

STW-1257 10/07/11 Cs-134 38.8 + 8.0 33.4 26.3 - 36.7 Fail STW-1257 10/07/11 Cs-137 45.6 +/- 7.3 44.3 39.4 -51.7 Pass STW-1257 10/07/11 Zn-65 84.9 +/- 15.4 76.8 68.9 - 92.5 Pass STW-1258 10/07/11 Gr. Alpha 35.7 +/- 3.8 53.2 27.8 - 66.6 Pass STW-1258 10/07/11 Gr. Beta 36.1 +/-3.3 45.9 30.9 -53.1 Pass STW-1259 10/07/11 1-131 25.0 +/- 1.1 27.5 22.9 - 32.3 Pass STW-1260 10/07/11 Ra-226 12.2 +/- 0.6 11.6 8.7 - 13.4 Pass STW-1260 10/07/11 Ra-228 11.5 +/- 1.7 10.3 6.7 - 12.8 Pass STW-1260 10/07/11 Uranium 46.6 +/- 0.5 48.6 39.4 - 54.0 Pass STW-1261 10/07/11 H-3 17435 +/-382 17400 15200 - 19100 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.

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

The sample was reanalyzed. Result of reanalysis was acceptable, 32.9 +/- 7.4 pCi/L.

A1-1

TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaSO4 : Dy Cards).

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

2010-2 12/13/2010 100 cm. 4.94 4.65 +/- 0.57 3.46 - 6.42 Pass 2010-2 12/1312010 110 cm. 4.09 3.50 +/- 0.74 2.86 -5.32 Pass 2010-2 12/13/2010 120 cm. 3.43 2.68 +/- 0.36 2.40 -4.46 Pass 2010-2 12/13/2010 150 cm. 2.2 1.75 +/- 0.42 1.54 -2.86 Pass 2010-2 12/13/2010 180 cm. 1.53 1.32 +/- 0.52 1.07 -1.99 Pass 2010-2 12/13/2010 40 cm. 30.89 38.56 +/- 2.11 21.62 -40.16 Pass 2010-2 12/13/2010 50 cm. 19.77 23.35 +/- 1.82 13.84 -25.70 Pass 2010-2 12/13/2010 60 cm. 13.73 14.53 +/- 1.24 9.61 - 17.85 Pass 2010-2 12/13/2010 60 cm. 13.73 15.84 +/- 1.53 9.61 - 17.85 Pass 2010-2 12/13/2010 80 cm. 7.72 8.33 +/- 0.74 5.40 - 10.04 Pass 2010-2 12/13/2010 90 cm. 6.1 5.93 +/- 0.73 4.27 - 7.93 Pass Environmental, Inc.

2011-1 7/6/2011 100 cm. 6.71 5.64 +/- 0.30 4.70 -8.72 Pass 2011-1 7/6/2011 110 cm. 5.54 4.60 +/- 0.46 3.88 -7.20 Pass 2011-1 7/6/2011 120 cm. 4.66 4.68 +/- 0.29 3.26 -6.06 Pass 2011-1 7/6/2011 150 cm. 2.98 2.93 +/- 0.66 2.09 - 3.87 Pass 2011-1 7/6/2011 180 cm. 2.07 2.05 +/- 0.18 1.45 -2.69 Pass 2011-1 7/6/2011 40 cm. 41.92 52.36 +/- 3.08 29.34 -54.50 Pass 2011-1 7/6/2011 45 cm. 33.12 41.83 +/- 3.46 23.18 -43.06 Pass 2011-1 7/6/2011 50 cm. 26.83 28.61 +/- 2.63 18.78 - 34.88 Pass 2011-1 7/6/2011 60 cm. 18.63 21.00 +/- '.15 13.04 -24.22 Pass 2011-1 7/6/2011 70 cm. 13.69 13.24 +/- 1.76 9.58 -17.80 Pass 2011-1 7/6/2011 80 cm. 10.48 12.18 +/- 0.65 7.34 -13.62 Pass 2011-1 7/6/2011 90 cm. 8.28 7.95 +/- 0.82 5.80 - 10.76 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=1 c Activity Limits d Acceptance SPW-202 1/17/2011 U-238 4.19 +/- 0.19 4.17 0.00 -16.17 Pass W-20111 2/1/2011 Ra-226 16.32 +/- 0.47 16.77 11.74 -21.80 Pass W-20711 2/7/2011 Gr. Alpha 23.02 +/- 0.45 20.00 10.00 -30.00 Pass W-20711 2/7/2011 Gr. Beta 46.59 +/- 0.41 45.20 35.20 - 55.20 Pass XWW-331 2/11/2011 Ba-1 33 144.30 +/- 8.50 144.40 129.96 -158.84 Pass XWVW-331 2/11/2011 Cs-1 34 22.20 +/- 3.70 21.50 11.50 -31.50 Pass XWW-331 2/11/2011 Cs-137 64.70 +/- 7.40 61.00 51.00 -71.00 Pass XWW-331 2/11/2011 H-3 13399 +/-334 12538 10030 -15046 Pass SPAP-567 2/14/2011 Gr. Beta 46.90 +/- 0.11 48.10 28.86 -67.34 Pass SPAP-569 2/14/2011 Cs-1 34 7.70 +/- 1.70 7.49 0.00 -17.49 Pass SPAP-569 2/14/2011 Cs-1 37 102.47 +/- 3.20 106.79 96.11 -117.47 Pass SPAP-571 2/14/2011 H-3 75815 +/- 542 73230 58584 - 87876 Pass SPW-581 2/15/2011 Cs-1 34 39.91 +/- 1.38 37.45 27.45 - 47.45 Pass SPW-581 2/15/2011 Cs-1 37 56.28 +/- 2.28 53.39 43.39 - 63.39 Pass SPW-581 2/15/2011 Sr-89 112.92 +/- 5.61 121.42 97.14 - 145.70 Pass SPW-581 2/15/2011 Sr-90 47.80 +/- 2.02 42.07 33.66 - 50.48 Pass SPMI-583 2/15/2011 Cs-1 37 57.04 +/- 2.76 53.39 43.39 - 63.39 Pass SPMI-583 2/15/2011 Sr-90 36.27 +/- 1.47 42.07 33.66 - 50.48 Pass SPW-602 2/17/2011 U-238 3.98 +/- 0.19 4.17 0.00 -16.17 Pass SPW-686 2/25/2011 Ni-63 167.41 +/- 3.05 208.11 145.68 - 270.54 Pass SPF-1113 3/17/2011 Cs-1 37 2369 +/- 22 2170 1953 -2387 Pass XWW-1602 3/21/2011 Ba-1 33 26.83 +/- 6.35 28.58 18.58 - 38.58 Pass XWW-1602 3/21/2011 Cs-1 34 18.90 +/- 4.06 16.30 6.30 - 26.30 Pass XWW-1602 3/21/2011 Cs-1 37 33.98 +/- 5.88 30.50 20.50 - 40.50 Pass XWW-1602 3/21/2011 H-3 7348 +/- 248 7617 6094 - 9140 Pass XWW-2537 4/4/2011 Ba-133 43.40 +/- 4.26 42.70 32.70 - 52.70 Pass XWW-2537 4/4/2011 Cs-134 13.50 +/- 2.40 11.90 1.90 -21.90 Pass XWW-2537 4/4/2011 Cs-137 68.30 +/- 5.90 60.70 50.70 - 70.70 Pass X'WW-2537 4/4/2011 H-3 7134 +/- 257 7234 5787 - 8681 Pass SPW-2877 5/3/2011 Ra-228 25.23 +/- 2.48 31.62 22.13 -41.11 Pass SPMI-3167 5/24/2011 Cs-134 33.04 +/- 8.25 34.19 24.19 - 44.19 Pass SPMI-3167 5/24/2011 Cs-1 37 51.53 +/- 8.63 53.06 43.06 - 63.06 Pass SPMI-3167 5/24/2011 Sr-89 90.89 +/- 4.30 93.47 74.78 - 112.16 Pass SPMI-3167 5/24/2011 Sr-90 41.17 +/- 1.53 41.80 33.44 - 50.16 Pass W-52411 5/24/2011 Ra-226 17.90 +/- 0.42 16.80 11.76 -21.84 Pass W-60711 6/7/2011 Gr. Alpha 23.00 +/- 0.49 20.00 10.00 -30.00 Pass W-60711 6/7/2011 Gr. Beta 43.27 +/- 0.42 45.20 35.20 - 55.20 Pass SPAP-4167 7/7/2011 Cs-1 34 6.92 +/- 1.45 6.57 0.00 - 16.57 Pass SPAP-4167 7/7/2011 Cs-1 37 108.02 +/- 2.84 105.80 95.22 -116.38 Pass SPW-4169 7/7/2011 Cs-1 34 34.52 +/- 4.79 32.84 22.84 -42.84 Pass SPW-4169 7/7/2011 Cs-1 37 58.29 +/- 6.19 52.92 42.92 -62.92 Pass A3-1

TABLE A-3. In-House "Spike" Samples Concentration (pCi/L)8 Lab Code b Date Analysis Laboratory results Known Control 2s, n=1 C Activity Limits d Acceptance SPW-4169 7/7/2011 Sr-89 66.12 +/-4.18 69.64 55.71 - 83.57 Pass SPW-4169 7/7/2011 Sr-90 41.72 +/- 1.79 41.68 33.34 - 50.02 Pass SPW-4171 7/7/2011 H-3 70582 +/- 767 71646 57317 - 85975 Pass SPW-4180 7/7/2011 Tc-99 95.69 +/- 1.65 97.02 67.91 -126.13 Pass SPW-41821 7/7/2011 Ra-228 32.57 +/- 2.63 30.63 21.44 -39.82 Pass SPW-4241 7/7/2011 Ni-63 403.01 +/- 4.66 415.20 290.64 - 539.76 Pass SPW-4180 7/8/2011 Tc-99 100.30 +/- 1.75 97.02 67.91 -126.13 Pass SPW-5029 7/29/2011 C-14 3991 +/-17 4739 2843 - 6634 Pass SPW-5031 7/29/2011 Fe-55 13801 +/-331 14895 11916 - 17874 Pass W-91411 9/14/2011 Gr. Alpha 21.58 +/- 0.44 20.00 10.00 - 30.00 Pass W-91411 9/14/2011 Gr. Beta 43.02 +/- 0.40 45.20 35.20 - 55.20 Pass SPW-91511 9/15/2011 Tc-99 29.92 +/- 1.07 32.34 20.34 - 44.34 Pass W-91911 9/19/2011 Ra-226 17.06 +/- 0.42 16.80 11.76 - 21.84 Pass W-1 00711 10/7/2011 Gr. Alpha 22.05 +/- 0.45 20.00 10.00 - 30.00 Pass W-1 00711 10/7/2011 Gr. Beta 45.51 +/- 0.41 45.20 35.20 - 55.20 Pass W-101111 10/11/2011 Ra-226 16.02 +/- 0.40 16.80 11.76 - 21.84 Pass XWVV-7220 11/17/2011 Ba-1 33 25.11 +/- 4.36 27.47 17.47 - 37.47 Pass XWW-7220 11/17/2011 Cs-1 34 14.09 +/- 3.11 16.60 6.60 - 26.60 Pass XWV-7220 11/17/2011 Cs-1 37 35.59 +/- 4.28 29.98 19.98 - 39.98 Pass W-113011 11/30/2011 Ra-226 16.12 +/- 0.39 16.80 11.76 - 21.84 Pass W-120111 12/1/2011 Gr. Alpha 21.34 +/- 0.43 20.00 10.00 -30.00 Pass W-120111 12/1/2011 Gr. Beta 45.55 +/- 0.41 45.20 35.20 - 55.20 Pass SPW-41823 12/9/2011 Ra-228 26.98 +/- 2.38 29.40 20.58 - 38.22 Pass SPMI-8906 12/22/2011 Cs-1 34 29.11 +/- 3.52 28.14 18.14 - 38.14 Pass SPMI-8906 12/22/2011 Cs-137 58.27 +/- 7.62 52.36 42.36 - 62.36 Pass SPW-8916 12/22/2011 Cs-1 34 31.74 +/- 3.63 28.14 18.14 - 38.14 Pass SPW-8916 12/22/2011 Cs-1 37 56.48 +/- 6.12 52.36 42.36 - 62.36 Pass SPAP-8902 12/23/2011 Gr. Beta 45.72 +/- 0.11 47.11 28.27 - 65.95 Pass SPAP-8904 12/23/2011 Cs-1 34 5.19 +/- 0.63 5.63 0.00 - 15.63 Pass SPAP-8904 12/23/2011 Cs-1 37 101.21 +/- 2.55 104.71 94.24 - 115.18 Pass SPW-8918 12/23/2011 H-3 136759 +/- 1056 137638 110110 - 165166 Pass SPW-8922 12/23/2011 Ni-63 202.21 +/- 3.75 206.88 144.82 - 268.94 Pass SPW-8924 12/23/2011 Tc-99 126.10 +/- 1.86 129.36 90.55 - 168.17 Pass SPF-8926 12/23/2011 Cs-1 34 0.34 +/- 0.01 0.33 0.20 - 0.47 Pass SPF-8926 12/23/2011 Cs-1 37 2.34 +/- 0.02 2.09 1.25 -2.93 Pass a Liquid sample results are reported in pCi/Liter, air filters( pCi/filter), charcoal (pCi/m 3), and solid samples (pCi/g).

k Laboratory codes as follows: W (water), Ml (milk), AP (air filter), SO (soil), VE (vegetation),

CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

dControl limits are established from the precision values listed in Attachment A of this report, adjusted to +/- 2 a.

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 Y)

SPW-202 Water 1/17/2011 U-238 0.10 0.12 +/- 0.12 1 W-20111 Water 2/1/2011 Ra-226 0.04 0.05 +/- 0.03 1 W-20711 Water 2/7/2011 Gr. Alpha 0.44 -0.02 +/- 0.29 W-20711 Water 2/7/2011 Gr. Beta 0.75 -0.03 +/- 0.53 3.2 SPAP-566 Air Filter 2/14/2011 Gr. Beta 0.64 2.24 +/- 0.61 3.2 SPAP-568 Air Filter 2/14/2011 Cs-134 2.34 100 SPAP-568 Air Filter 2/14/2011 Cs-137 1.56 100 SPAP-570 Air Filter 2/14/2011 H-3 103.20 -49.40 +/- 52.50 200 SPW-580 Water 2/15/2011 Cs-134 2.68 10 SPW-580 Water 2/15/2011 Cs-137 2.84 10 SPW-580 Water 2/15/2011 Sr-89 0.73 0.24 +/- 0.57 5 SPW-580 Water 2/15/2011 Sr-90 0.57 0.02 +/- 0.27 1 SPMI-582 Milk 2/15/2011 Cs-134 3.49 10 SPMI-582 Milk 2/15/2011 Cs-1 37 3.54 10 SPMI-582 Milk 2/15/2011 1-131(G) 4.14 20 SPMI-582 Milk 2/15/2011 Sr-89 0.71 0.16 +/- 0.67 5 SPMI-582 Milk 2/15/2011 Sr-90 0.55 0.59 +/- 0.32 1 SPW-601 Water 2/17/2011 U-238 0.20 0.09 +/- 0.17 1 SPW-685 Water 2/25/2011 Ni-63 1.61 0.05 +/- 0.98 20 SPF-1112 Fish 3/17/2011 Cs-134 6.74 100 SPF-1112 Fish 3/17/2011 Cs-137 5.45 100 BKW-401 11 Water 4/1/2011 1-131 4.16 10 BKW-401 11 Water 4/1/2011 Co-60 3.11 10 BKW-401 11 Water 4/1/2011 Cs-134 4.73 10 BKW-401 11 Water 4/1/2011 Cs-137 5.04 10 SPW-2887 Water 5/3/2011 Ra-228 0.72 0.46 +/- 0.39 2 W-52411 Water 5/24/2011 Ra-226 0.04 0.05 +/- 0.03 1 W-60711 Water 6/712011 Gr. Alpha 0.51 0.00 +/- 0.36 1 W-60711 Water 6/7/2011 Gr. Beta 1.58 0.38 +/- 1.12 3.2 SPAP-4164 Air Filler 7/7/2011 Gr. Beta 0.72 1.04 +/- 0.48 3.2 SPW-4168 Water 7/7/2011 Cs-134 3.41 10 SPW-4168 Water 7/7/2011 Cs-137 2.45 10 SPW-4168 Water 7/7/2011 Sr-89 0.72 0.40 +/- 0.50 5 SPW-4168 Water 7/7/2011 Sr-90 0.51 -0.19 +/- 0.21 1 SPW-4171 Water 7/7/2011 H-3 152.00 37.10 +/- 81.80 200 SPW-41811 Water 7/7/2011 Ra-228 0.77 0.51 +/- 0.42 2 A4-1

TABLE A-4. In-House "Blank" Samples Concentration (pCi/L)a Lab Code Sample Date Analysisb Laboratory results (4.66o) Acceptance Type LLD Activityc Criteria (4.66 a)

SPW-4241 Water 7/7/2011 Ni-63 1.70 0.09 +/- 1.03 20 SPW-4179 Water 7/8/2011 Tc-99 1.20 -0.96 +/- 0.71 10 SPW-5028 Water 7/29/2011 C-14 109.80 61.90 +/- 59.20 200 SPW-5031 Water 7/29/2011 Fe-55 140.60 0.00 +/- 85.30 1000 W-91411 Water 9/14/2011 Gr. Alpha 0.48 -0.06 +/- 0.33 1 W-91411 Water 9/14/2011 Gr. Beta 0.78 -0.43 +/- 0.53 3.2 SPW-91511 Water 9/15/2011 Tc-99 1.11 -0.62 +/- 0.66 10 W-91911 Water 9/19/2011 Ra-226 0.03 0.04 +/- 0.02 1 Gr. Alpha -0.26 +/- 0.28 1 W-100711 Water 10/7/2011 0.44 W-100711 Water 10/7/2011 Gr. Beta 0.76 -0.43 +/- 0.52 3.2 W-101111 Water 10/11/2011 -Ra-226 0.04 0.05 +/- 0.03 1 0.03 W-113011 Water 11/30/2011 Ra-226 0.04 +/- 0.02 1 W-120111 Water 12/1/2011 Gr. Alpha 0.41 -0.20 +/- 0.27 1 W-120111 Water 12/1/2011 Gr. Beta 0.75 -0.10 +/- 0.53 3.2 SPW-41813 Water 12/9/2011 Ra-228 0.71 0.17 +/- 0.35 2 SPMI-8905 Milk 12/22/2011 Cs-134 3.27 10 SPMI-8905 Milk 12/22/2011 Cs-137 3.38 10 SPMI-8905 Milk 12/22/2011 1-131(G) 2.17 20 SPW-8915 Water 12/22/2011 Cs-134 3.37 10 SPW-8915 Water 12/22/2011 Cs-137 3.45 10 SPW-8915 Water 12/22/2011 1-131(G) 3.38 20 SPAP-8901 Air Filter 12/23/2011 Gr. Beta 0.78 0.50 +/- 0.46 3.2 SPAP-8903 Air Filter 12/23/2011 Cs-134 1.65 100 SPAP-8903 Air Filter 12/23/2011 Cs-137 2.41 100 SPW-8917 Water 12/23/2011 H-3 150.20 -3,04 +/- 78.80 200 SPW-8921 Water 12/23/2011 Ni-63 16.92 -4.60 +/- 10.16 20 SPW-8923 Water 12/23/2011 Tc-99 5.66 -5.45 +/- 3.34 10 Cs-134 7.15 100 SPF-8925 Fish 12/23/2011 SPF-8925 Fish 12/23/2011 Cs-137 9.73 100 Liquid sample results are reported in pCi/Liter, air filters( pCi/filter), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

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

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

A4-2

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance CF-20, 21 1/3/2011 Be-7 0.24 +/- 0.14 0.34 +/- 0.17 0.29 +/- 0.11 Pass CF-20, 21 1/3/2011 K-40 10.37 +/- 0.43 9.76 +/- 0.68 10.07 +/- 0.40 Pass CF-20, 21 1/3/2011 Sr-90 0.01 +/- 0.01 0.01 +/- 0.01 0.01 +/- 0.00 Pass WW-65, 66 1/6/2011 H-3 321.91 +/- 97.19 345.76 +/- 98.16 333.83 +/- 69.06 Pass BS-165, 166 1/11/2011 Cs-1 37 0.13 +/- 0.02 0.15 +/- 0.02 0.14 +/- 0.01 Pass BS-165, 166 1/11/2011 H-3 286.00 +/- 80.00 284.00 +/- 80.00 285.00 +/- 56.57 Pass BS-165, 166 1/11/2011 K-40 14.11 +/- 0.52 13.79 +/- 0.60 13.95 +/- 0.40 Pass BS-176, 177 1/11/2011 H-3 391.00 +/- 92.00 332.00 +/- 89.00 361.50 +/- 64.00 Pass BS-176, 177 1/11/2011 K-40 9.06 +/- 0.44 8.28 +/- 0.81 8.67 +/- 0.46 Pass BS-197, 198 1/11/2011 Cs-1 37 0.14 +/- 0.03 0.15 +/- 0.04 0.15 +/- 0.03 Pass BS-197, 198 1/11/2011 H-3 459.00 +/- 103.00 283.00 +/- 95.00 371.00 +/- 70.06 Pass BS-1 97, 198 1/11/2011 K-40 14.40 +/- 0.77 14.16 +/- 1.23 14.28 +/- 0.73 Pass WW-358, 359 1/17/2011 H-3 331.44 +/- 93.05 407.65 +/- 95.91 369.55 +/- 66.81 Pass DW-20009, 20010 1/19/2011 Ra-226 3.66 +/- 0.57 2.74 +/- 0.43 3.20 +/- 0.36 Pass DW-20009, 20010 1/19/2011 Ra-228 1.51 +/- 0.64 1.36 +/- 0.60 1.44 +/- 0.44 Pass WW-337, 338 1/25/2011 H-3 21986 +/- 402 21896 +/- 401 21941 +/- 284 Pass W-491, 492 1/27/2011 Ra-226 6.70 +/- 0.50 6.10 +/- 0.50 6.40 +/- 0.35 Pass W-491, 492 1/27/2011 Ra-228 6.60 +/- 1.30 8.40 +/- 1.40 7.50 +/- 0.96 Pass DW-20014, 20015 1/28/2011 Gr. Alpha 1.91 +/- 0.71 2.34 +/- 0.80 2.13 +/- 0.53 Pass SWU-447, 448 1/31/2011 Gr. Beta 7.42 +/- 1.17 6.85 +/- 1.11 7.14 +/- 0.81 Pass W-694, 695 2/7/2011 H-3 628.26 +/- 104.30 692.37 +/- 106.89 660.32 +/- 74.67 Pass DW-20022, 20023 2/9/2011 Ra-228 0.71 +/- 0.47 1.13 +/- 0.54 0.92 +/- 0.36 Pass SW-626, 627 2/16/2011 H-3 1268.17 +/- 129.52 1144.65 +/- 125.39 1206.41 +/- 90.14 Pass LW-825, 826 2/24/2011 Gr. Beta 2.65 +/- 0.82 2.45 +/- 0.74 2.55 +/- 0.55 Pass SW-T-845, 846 3/1/2011 Gr. Beta 1.11 +/- 0.39 0.80 +/- 0.37 0.96 +/- 0.27 Pass MI-998, 999 3/7/2011 K-40 1760.10 + 127.50 1708.50 +/- 131.60 1734.30 +/- 91.62 Pass W-1024, 1025 3/7/2011 H-3 489.83 +/- 101.09 581.39 +/- 105.06 535.61 +/- 72.90 Pass WW-1156, 1157 3/16/2011 Gr. Beta 1.79 +/- 0.78 0.47 +/- 0.66 1.13 +/- 0.51 Pass P-1198, 1199 3/17/2011 H-3 504.00 +/- 133.00 597.00 +/- 136.00 550.50 +/- 95.11 Pass SW-1434, 1435 3/28/2011 H-3 15523 +/- 359 15968 +/-364 15746 +/-256 Pass WW-1588, 1589 3/28/2011 Gr. Beta 1.81 +/- 1.23 2.81 +/- 1.38 2.31 +/- 0.92 Pass SG-1714, 1715 3/28/2011 Gr. Alpha 8.82 +/- 0.81 8.58 +/- 0.74 8.70 +/- 0.55 Pass SG-1714, 1715 3/28/2011 Gr. Beta 13.78 +/- 0.65 12.76 +/- 0.58 13.27 +/- 0.44 Pass AP-1862, 1863 3/28/2011 Be-7 0.09 +/- 0.02 0.08 +/- 0.02 0.08 +/- 0.01 Pass W-2143, 2144 3/28/2011 H-3 536.40 +/- 99.37 466.79 +/- 96.46 501.59 +/- 69.25 Pass AP-2269, 2270 3/28/2011 Be-7 0.07 +/- 0.01 0.08 +/- 0.01 0.07 +/- 0.01 Pass DW-20061, 20062 3/28/2011 Gr. Alpha 2.82 +/- 1.33 3.89 +/- 1.26 3.36 +/- 0.92 Pass SWU-1455, 1456 3/29/2011 Gr. Beta 2.50 +/- 0.75 2.75 +/- 0.83 2.62 +/- 0.56 Pass SWU-1522, 1523 3/29/2011 Gr. Beta 1.36 +/- 0.87 2.14 +/- 0.96 1.75 +/- 0.65 Pass PM-1543, 1544 3/29/2011 Gr. Beta 13.81 +/- 0.26 13.67 +/- 0.27 13.74 +/- 0.19 Pass PM-1543, 1544 3/29/2011 Sr-90 8.12 +/- 3.20 7.71 +/- 3.25 7.91 +/- 2.28 Pass A5-1

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance SWT-5885, 5886 3/29/2011 Gr. Beta 1.21 +/- 0.54 0.77 +/- 0.54 0.99 +/- 0.38 Pass AP-1883, 1884 3/30/2011 Be-7 0.07 +/- 0.01 0.09 +/- 0.02 0.08 +/- 0.01 Pass AP-2248, 2249 3/30/2011 Be-7 0.06 +/- 0.01 0.06 +/- 0.01 0.06 +/- 0.01 Pass DW-20066, 20067 3/30/2011 Ra-226 2.14 +/- 0.16 2.10 +/- 0.16 2.12 +/- 0.11 Pass DW-20066, 20067 3/30/2011 Ra-228 2.55 +/- 0.65 1.78 +/- 0.62 2.17 +/- 0.45 Pass P-1567, 1568 4/1/2011 H-3 289.00 +/- 103.00 296.00 +/- 103.00 292.50 +/- 72.83 Pass MI-1609, 1610 4/4/2011 1-131 0.85 +/- 0.17 0.91 +/- 0.18 0.88 +/- 0.13 Pass MI-1609, 1610 4/4/2011 K-40 1323.80 +/- 112.00 1323.20 +/- 96.22 1323.50 +/- 73.83 Pass MI-1609, 1610 4/4/2011 Sr-90 0.85 +/- 0.33 0.97 +/- 0.34 0.91 +/- 0.24 Pass S-1651, 1652 4/4/2011 Ac-228 0.88 +/- 0.08 1.03 +/- 0.22 0.96 +/- 0.12 Pass S-1651, 1652 4/4/2011 Pb-214 1.09 +/- 0.12 0.84 +/- 0.16 0.97 +/- 0.10 Pass AP-1841, 1842 4/7/2011 Be-7 0.12 +/- 0.02 0.12 +/- 0.01 0.12 +/- 0.01 Pass AP-1841, 1842 4/7/2011 Cs-1 37 0.00 +/- 0.00 0.00 +/- 0.00 0.00 +/- 0.00 Pass AP-1841, 1842 4/7/2011 1-131(G) 0.02 +/- 0.00 0.03 +/- 0.00 0.03 +/- 0.00 Pass S-1990,1991 4/7/2011 Ac-228 15.83 +/- 0.39 16.12 +/- 0.64 15.98 +/- 0.37 Pass S-1990,1991 4/7/2011 Pb-214 11.21 +/- 0.23 11.81 +/- 1.22 11.51 +/- 0.62 Pass WW-2552, 2553 4/7/2011 H-3 761.09 +/- 116.48 759.04 +/- 116.41 760.07 +/- 82.34 Pass PM-1904, 1905 4/11/2011 K-40 13585 +/- 611 14278 +/-648 13932 +/-445 Pass PM-1904,1905 4/11/2011 Sr-90 9.94 +/- 3.05 5.62 +/- 2.52 7.78 +/- 1.98 Pass P-2011, 2012 4/11/2011 H-3 670.00 +/- 108.00 619.00 +/- 106.00 644.50 +/- 75.66 Pass MW-2053, 2054 4/13/2011 H-3 220.20 +/- 86.50 246.80 +/- 87.80 233.50 +/- 61.63 Pass BS-2095,2096 4/13/2011 K-40 12.88 +/- 0.72 13.56 +/- 1.08 13.22 +/- 0.65 Pass DW-20099, 20100 4/13/2011 U-233/4 1.64 +/- 0.40 1.31 +/- 0.34 1.48 +/- 0.26 Pass DW-20099, 20100 4/13/2011 U-238 1.49 +/- 0.39 1.28 +/- 0.33 1.39 +/- 0.26 Pass WN-2416, 2417 4/19/2011 H-3 217.10 +/- 97.00 184.90 +/- 95.60 201.00 +/- 68.10 Pass P-2185, 2186 4/20/2011 H-3 405.00 +/- 93.00 504.00 +/- 98.00 454.50 +/- 67.55 Pass VWV-2353, 2354 4/20/2011 H-3 525.54 +/- 119.74 399.41 +/- 115.99 462.48 +/- 83.35 Pass DW-20115, 20116 4/26/2011 U-233/4 11.94 +/- 2.34 10.71 +/- 1.19 11.33 +/- 1.31 Pass DW-20115, 20116 4/26/2011 U-238 2.70 +/- 1.15 3.89 +/- 0.72 3.30 +/- 0.68 Pass SO-2960, 2961 4/27/2011 K-40 22.53 +/- 1.36 22.90 +/- 0.03 22.77 +/- 0.68 Pass MI-2657, 2658 5/2/2011 K-40 1319.30 +/- 101.30 1403.20 +/- 131.60 1361.25 +/- 83.04 Pass DW-20130, 20131 5/2/2011 U-233/4 7.59 +/- 0.90 7.62 +/- 0.83 7.61 +/- 0.61 Pass DW-20130, 20131 5/2/2011 U-238 4.67 +/- 0.72 4.84 +/- 0.66 4.76 +/- 0.49 Pass DW-20148, 20149 5/3/2011 U-233/4 6.64 +/- 0.83 6.35 +/- 0.81 6.50 +/- 0.58 Pass DW-20148, 20149 5/3/2011 U-238 6.11 +/- 0.83 5.18 +/- 0.73 5.65 +/- 0.55 Pass PM-2810, 2811 5/4/2011 Cs-1 34 18.64 +/- 12.16 33.33 +/- 11.86 25.99 +/- 8.49 Pass PM-2810, 2811 5/4/2011 Cs-1 37 28.99 +/- 14.92 21.17 +/- 12.16 25.08 +/- 9.62 Pass PM-2810, 2811 5/4/2011 K-40 14368 +/-720 14309 +/-638 14339 +/- 481 Pass WW-3065, 3066 5/16/2011 H-3 280.51 +/- 86.98 179.46 +/- 82.83 229.98 +/- 60.05 Pass WW-3086, 3087 5/16/2011 H-3 341.14 +/- 85.94 377.97 +/- 87.43 359.56 +/- 61.30 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 SG-3134, 3135 5/16/2011 Ac-228 11.19 +/- 0.82 12.50 +/- 0.84 11.85 +/- 0.59 Pass SG-3134, 3135 5/16/2011 Pb-214 9.12 +/- 0.17 9.37 +/- 0.42 9.25 +/- 0.23 Pass F-3221, 3222 5/23/2011 K-40 2.73 +/- 0.39 2.81 +/- 0.42 2.77 +/- 0.29 Pass SS-3434, 3435 5/25/2011 K-40 11533.00 +/- 563.70 11236.00 +/- 566.10 11384.50 +/- 399.45 Pass AP-3329, 3330 5/26/2011 Be-7 0.24 +/- 0.11 0.23 +/- 0.13 0.24 +/- 0.08 Pass VWV-3350, 3351 6/1/2011 H-3 235.37 +/- 83.98 173.12 +/- 81.05 204.25 +/- 58.36 Pass G-3413,3414 6/1/2011 Be-7 0.28 +/- 0.10 0.25 +/- 0.09 0.27 +/- 0.07 Pass G-3413,3414 6/1/2011 Gr. Beta 11.04 +/- 0.31 10.85 +/- 0.31 10.95 +/- 0.22 Pass G-3413,3414 6/1/2011 K-40 6.80 +/- 0.33 6.71 +/- 0.38 6.76 +/- 0.25 Pass AP-3602, 3603 6/3/2011 Be-7 0.20 +/- 0.08 0.25 +/- 0.10 0.22 +/- 0.07 Pass SO-3797, 3798 6/8/2011 Ac-228 0.99 +/- 0.05 1.00 +/- 0.06 1.00 +/- 0.04 Pass SO-3797, 3798 6/8/2011 Bi-212 1.10 +/- 0.12 1,08 +/- 0.17 1.09 +/- 0.10 Pass SO-3797, 3798 6/8/2011 Bi-214 0.87 +/- 0.02 0.86 +/- 0.02 0.87 +/- 0.01 Pass SO-3797, 3798 6/8/2011 Cs-1 37 0.41 +/- 0.01 0.39 +/- 0.01 0.40 +/- 0.01 Pass SO-3797, 3798 6/8/2011 K-40 16.08 +/- 0.26 16.27 +/- 0.29 16.18 +/- 0.19 Pass SO-3797,3798 6/8/2011 Pb-212 0.98 +/- 0.10 0.93 +/- 0.02 0.96 +/- 0.05 Pass SO-3797,3798 6/8/2011 Pb-214 0.95 +/- 0.02 0.91 +/- 0.02 0.93 +/- 0.01 Pass SO-3797,3798 6/8/2011 Th-232 0.47 +/- 0.05 0.49 +/- 0.04 0.48 +/- 0.03 Pass SO-3797,3798 6/8/2011 U-233/4 0.16 +/- 0.02 0.15 +/- 0.02 0.16 +/- 0.01 Pass SO-3797,3798 6/8/2011 U-238 0.16 +/- 0.02 0.13 +/- 0.02 0.15 +/- 0.01 Pass MI-3935, 3936 6/20/2011 K-40 1764.60 +/- 119.40 1843.10 +/- 136.50 1803.85 +/- 90.68 Pass BS-4172, 4173 6/21/2011 Cs-137 51.50 +/- 23.78 48.57 +/- 17.06 50.04 +/- 14.63 Pass BS-4172, 4173 6/21/2011 K-40 11730.00 +/- 679.60 11120.00 +/- 512.30 11425.00 +/- 425.53 Pass DW-20183, 20184 6/21/2011 U-233/4 10.00 +/- 1.00 8.40 +/- 0.90 9.20 +/- 0.67 Pass DW-20183, 20184 6/21/2011 U-238 6.70 +/- 0.80 6.10 +/- 0.80 6.40 +/- 0.57 Pass WW-4019, 4020 6/24/2011 Gr. Beta 3.56 +/- 1.20 3.16 +/- 1.21 3.36 +/- 0.85 Pass PM-4193, 4194 6/30/2011 K-40 14795.00 +/- 759.00 14660.00 +/- 750.00 14727.50 +/- 533.52 Pass LW-4235, 4236 6/30/2011 Gr. Beta 2.70 +/- 0.72 2.11 +/-0.78 2.41 +/- 0.53 Pass AP-4367, 4368 7/7/2011 Be-7 0.17 +/- 0.10 0.19 +/- 0.11 0.18 +/- 0.07 Pass MI-4416, 4417 7/11/2011 K-40 1342.40 +/- 91.49 1447.00 +/- 114.80 1394.70 +/- 73.40 Pass W-4914,4915 7/11/2011 H-3 576.36 +/- 110.35 584.67 +/- 110.67 580.52 +/- 78.14 Pass MI-4438, 4439 7/12/2011 K-40 1280.60 +/- 107.50 1381.20 +/- 112.70 1330.90 +/- 77.87 Pass VE-4481, 4482 7/13/2011 K-40 4452.60 +/- 332.40 4767.90 +/- 349.70 4610.25 +/- 241.24 Pass AP-4677, 4678 7/15/2011 Be-7 0.18 +/- 0.08 0.23 +/- 0.09 0.20 +/- 0.06 Pass W-5537,5538 7/18/2011 H-3 650.13 +/- 105.19 695.39 +/- 106.94 672.76 +/- 75.00 Pass P-4764, 4765 7/19/2011 H-3 179.82 +/- 84.81 138.72 +/- 82.79 159.27 +/- 59.26 Pass WV-5211, 5212 7/24/2011 H-3 191.94 +/- 85.50 136.22 +/- 82.76 164.08 +/- 59.50 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 VE-4998, 4999 7/25/2011 Be-7 543.90 +/- 158.20 488.30 +/- 163.80 516.10 +/- 113.86 Pass VE-4998, 4999 7/25/2011 K-40 2562.20 +/- 319.80 2414.00 +/- 350.00 2488.10 +/- 237.05 Pass DW-20258, 20259 7/25/2011 U-233/4 21.34 +/- 1.52 24.93 +/- 2.93 23.14 +/- 1.65 Pass DW-20258, 20259 7/25/2011 U-235 0.57 +/- 0.26 0.69 +/- 0.26 0.63 +/- 0.18 Pass DW-20258, 20259 7/25/2011 U-238 14.11 +/- 1.24 15.81 +/- 1.23 14.96 +/- 0.87 Pass DW-20269, 20270 7/25/2011 U-233/4 4.93 +/- 0.73 4.65 +/- 0.68 4.79 +/- 0.50 Pass DW-20269, 20270 7/25/2011 U-238 3.26 +/- 0.60 2.53 +/- 0.50 2.90 +/- 0.39 Pass DW-20280, 20281 7/25/2011 U-233/4 3.58 +/- 0.58 3.33 +/- 0.56 3,46 +/- 0.40 Pass DW-20280, 20281 7/25/2011 U-238 1.64 +/- 0.40 2.11 +/- 0.45 1.88 +/- 0.30 Pass MI-5019, 5020 7/26/2011 K-40 1348.50 +/- 101.00 1347.40 +/- 109.70 1347.95 +/- 74.56 Pass W-5447,5448 7/26/2011 H-3 246.31 +/- 99.19 241.99 +/- 99.02 244.15 +/- 70.08 Pass G-5124,5125 7/28/2011 Gr. Beta 7.48 +/- 0.20 7.17 +/- 0.19 7.33 +/- 0.14 Pass AP-5232, 5233 7/28/2011 Be-7 0.15 +/- 0.08 0.22 +/- 0.13 0.19 +/- 0.08 Pass SL-5169, 5170 8/1/2011 Be-7 2.37 +/- 0.16 2.17 +/- 0.17 2.27 +/- 0.12 Pass SL-5169, 5170 8/1/2011 Gr. Beta 4.74 +/- 0.45 3.94 +/- 0.39 4.34 +/- 0.30 Pass SL-5169, 5170 8/1/2011 K-40 3.12 +/- 0.16 2.96 +/- 0.21 3.04 +/- 0.13 Pass G-5190, 5191 8/1/2011 Be-7 3.14 +/- 0.30 3.44 +/- 0.27 3.29 +/- 0.20 Pass G-5190, 5191 8/1/2011 Gr. Beta 8.07 +/- 0.28 7.86 +/- 0.27 7.97 +/- 0.19 Pass G-5190,5191 8/1/2011 K-40 5.51 +/- 0.46 5.57 +/- 0.44 5.54 +/- 0.32 Pass DW-20291, 20292 8/2/2011 U-233/4 3.24 +/- 0.54 2.60 +/- 0.50 2.92 +/- 0.37 Pass DW-20291, 20292 8/2/2011 U-238 1.59 +/- 0.38 2.00 +/- 0.43 1.80 +/- 0.29 Pass SG-5342, 5343 8/5/2011 Ac-228 14.41 +/- 0.36 14.13 +/- 0.48 14.27 +/- 0.30 Pass SG-5342, 5343 8/5/2011 Bi-212 4.14 +/- 0.65 4.73 +/- 1.21 4.44 +/- 0.69 Pass SG-5342, 5343 8/5/2011 K-40 7.67 +/- 0.92 7.95 +/- 1.21 7.81 +/- 0.76 Pass SG-5342, 5343 8/5/2011 Pb-214 10.72 +/- 0.21 10.67 +/- 0.28 10.70 +/- 0.18 Pass SG-5342,5343 8/5/2011 TI-208 0.96 +/- 0.06 1.00 +/- 0.06 0.98 +/- 0.04 Pass MI-5405, 5406 8/8/2011 K-40 1545.30 +/- 116.00 1388.00 +/- 98.20 1466.65 +/- 75.99 Pass DW-20301, 20302 8/9/2011 Gr. Alpha 6.36 +/- 1.09 5.30 +/- 1.08 5.83 +/- 0.77 Pass DW-20301, 20302 8/9/2011 Gr. Beta 14.36 +/- 0.92 13.51 +/- 0.89 13.94 +/- 0.64 Pass DW-5603, 5604 8/16/2011 Ra-228 1.68 +/- 0.88 2.26 +/- 0.91 1.97 +/- 0.63 Pass VE-5753, 5754 8/22/2011 Be-7 0.78 +/- 0.20 0.75 +/- 0.23 0.77 +/- 0.15 Pass VE-5753, 5754 8/22/2011 K-40 6.16 +/- 0.51 6.63 +/- 0.57 6.40 +/- 0.38 Pass S-5801, 5802 8/29/2011 Ac-228 0.43 +/- 0.09 0.38 +/- 0.07 0.41 +/- 0.06 Pass S-5801,5802 8/29/2011 K-40 6.54 +/- 0.51 5.96 +/- 0.49 6.25 +/- 0.35 Pass S-5801, 5802 8/29/2011 Pb-212 0.31 +/- 0.03 0.36 +/- 0.03 0.34 +/- 0.02 Pass S-5801, 5802 8/29/2011 Pb-214 0.28 +/- 0.04 0.25 +/- 0.04 0.27 +/- 0.03 Pass S-5801, 5802 8/29/2011 TI-208 0.14 +/- 0.02 0.12 +/- 0.02 0.13 +/- 0.01 Pass S-5801, 5802 8/29/2011 U-235 0.05 +/- 0.02 0.04 +/- 0.01 0.05 +/- 0.01 Pass ME-5996, 5997 9/1/2011 Gr. Alpha 0.03 +/- 0.02 0.03 +/- 0.02 0.03 +/- 0.01 Pass ME-5996, 5997 9/1/2011 Gr. Beta 2.55 +/- 0.07 2.62 +/- 0.07 2.58 +/- 0.05 Pass ME-5996, 5997 9/1/2011 K-40 2.66 +/- 0.35 2.24 +/- 0.58 2.45 +/- 0.34 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 SL-6017, 6018 9/6/2011 Be-7 0.47 +/- 0.17 0.51 +/- 0.19 0.49 +/- 0.13 Pass SL-6017, 6018 9/6/2011 Gr. Beta 4.23 +/- 0.16 3.94 +/- 0.15 4.09 +/- 0.11 Pass SL-6017, 6018 9/6/2011 K-40 4.43 +/- 0.55 4.24 +/- 0.53 4.34 +/- 0.38 Pass VE-6038, 6039 9/7/2011 Sr-90 1.86 +/- 0.98 2.30 +/- 0.92 2.08 +/- 0.67 Pass SW-6059, 6060 9/8/2011 H-3 219.75 +/- 97.52 177.41 +/- 95.76 198.58 +/- 68.34 Pass VE-6302, 6303 9/13/2011 Be-7 0.76 +/- 0.24 0.85 +/- 0.20 0.81 +/- 0.16 Pass VE-6302, 6303 9/13/2011 Gr. Beta 27.00 +/- 1.02 25.50 +/- 0.95 26.25 +/- 0.70 Pass VE-6302, 6303 9/13/2011 H-3 6966.00 +/- 249.00 6947.00 +/- 249.00 6956.50 +/- 176.07 Pass VE-6302, 6303 9/13/2011 K-40 20.62 +/- 0.68 20.63 +/- 0.64 20.63 +/- 0.47 Pass W-7098, 7099 9/19/2011 H-3 586.61 +/- 103.06 525.71 +/- 100.63 556.16 +/- 72.02 Pass W-6407, 6408 9/20/2011 Ra-228 1.61 +/- 0.94 0.79 +/- 0.81 1.20 +/- 0.62 Pass MI-6479, 6480 9/27/2011 K-40 1384.10 +/- 111.10 1411.40 +/- 105.00 1397.75 +/- 76.43 Pass W-6579, 6580 9/27/2011 H-3 287.97 +/- 99.68 285.95 +/- 99.60 286.96 +/- 70.45 Pass AP-7015, 7016 9/27/2011 Be-7 0.08 +/- 0.02 0.09 +/- 0.02 0.08 +/- 0.01 Pass AP-6105, 6106 9/28/2011 Be-7 0.11 +/- 0.02 0.09 +/- 0.02 0.10 +/- 0.01 Pass LW-6603, 6604 9/28/2011 Gr. Beta 2.15 +/- 1.04 1.65 +/- 0.90 1.90 +/- 0.69 Pass AP-7056, 7057 9/29/2011 Be-7 0.08 +/- 0.02 0.06 +/- 0.01 0.07 +/- 0.01 Pass G-6730, 6731 10/3/2011 Be-7 4.24 +/- 0.36 4.47 +/- 0.37 4.36 +/- 0.26 Pass G-6730, 3731 10/3/2011 Gr. Beta 8.27 +/- 0.33 7.93 +/- 0.31 8.10 +/- 0.23 Pass G-6730, 6731 10/3/2011 K-40 6.46 +/- 0.56 5.41 +/- 0.50 5.94 +/- 0.38 Pass AP-7077, 7078 10/3/2011 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 Pass AP-7077, 7078 10/3/2011 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 Pass VE-6798, 6799 10/4/2011 K-40 11.76 +/- 0.65 11.91 +/- 0.62 11.84 +/- 0.45 Pass AP-6820, 6821 10/6/2011 Be-7 0.22 +/- 0.08 0.18 +/- 0.10 0.20 +/- 0.06 Pass W-7755, 7756 10/9/2011 H-3 261.92 +/- 96.52 221.92 +/- 94.80 241.92 +/- 67.65 Pass BS-7944, 7945 10/10/2011 Cs-1 37 291.17 +/- 34.00 330.68 +/- 36.40 310.93 +/- 24.90 Pass BS-7944, 7945 10/10/2011 K-40 14237.00 +/- 686.40 15359.00 +/- 703.80 14798.00 +/- 491.55 Pass BS-7140, 7141 10/13/2011 K-40 2.59 +/- 0.35 2.58 +/- 0.52 2.59 +/- 0.31 Pass AP-7168, 7169 10/13/2011 Be-7 0.25 +/- 0.09 0.25 +/- 0.11 0.25 +/- 0.07 Pass DW-20349, 20350 10/13/2011 U-233/4 1.77 +/- 0.41 2.25 +/- 0.77 2.01 +/- 0.44 Pass DW-20349, 20350 10/13/2011 U-238 0.28 +/- 0.19 0.31 +/- 0.33 0.30 +/- 0.19 Pass WW-7667, 7668 10/19/201 1 H-3 1049.11 +/- 116.32 1071.39 +/- 117.10 1060.25 +/- 82.53 Pass WW-7381, 7382 10/21/2011 H-3 1904.40 +/- 145.45 1813.62 +/- 142.91 1859.01 +/- 101.95 Pass SS-7495, 7496 10/26/2011 K-40 10.16 +/- 0.55 9.56 +/- 0.49 9.86 +/- 0.37 Pass W-7516, 7517 10/27/2011 H-3 191.46 +/- 84.47 224.05 +/- 86.03 207.76 +/- 60.28 Pass VE-7537, 7538 10/28/2011 K-40 2.08 +/- 0.23 2.41 +/- 0.21 2.24 +/- 0.16 Pass MI-7622, 7623 10/31/2011 K-40 1386.20 +/- 116.80 1407.90 +/- 116.50 1397.05 +/- 82.48 Pass DW-20399, 20400 10/31/2011 U-233/4 5.70 +/- 0.70 5.70 +/- 0.70 5.70 +/- 0.49 Pass DW-20399, 20400 10/31/2011 U-238 3.10 +/- 0.50 3.70 +/- 0.70 3.40 +/- 0.43 Pass BS-7600, 7601 11/1/2011 Gr. Beta 6.83 +/- 1.44 5.31 +/- 1.35 6.07 +/- 0.98 Pass A5-5

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance SG-8471, 8472 11/1/2011 Gr. Alpha 13.63 +/- 2.32 11.13 +/- 2.00 12.38 +/- 1.53 Pass SG-8471, 8472 11/1/2011 Gr. Beta 20.30 +/- 1.43 17.65 +/- 1.42 18.98 +/- 1.01 Pass DW-20424, 20425 11/7/2011 U-233/4 5.90 +/- 0.80 6.10 +/- 0.80 6.00 +/- 0.57 Pass DW-20424, 20425 11/7/2011 U-235 0.10 +/- 0.10 0.30 +/- 0.20 0.20 +/- 0.11 Pass DW-20424, 20425 11/7/2011 U-238 4.30 +/- 0.70 3.70 +/- 0.60 4.00 +/- 0.46 Pass DW-20424, 20425 11/7/2011 U-238 10.30 +/- 1.00 10.10 +/- 1.00 10.20 +/- 0.71 Pass DW-20435, 20436 11/8/2011 U-233/4 11.00 +/- 1.10 10.60 +/- 0.80 10.80 +/- 0.68 Pass DW-20435, 20436 11/8/2011 U-238 5.90 +/- 0.80 4.90 +/- 0.60 5.40 +/- 0.50 Pass SG-7902, 7903 11/10/2011 Ac-228 21.38 +/- 0.47 20.48 +/- 0.52 20.93 +/- 0.35 Pass SG-7902, 7903 11/10/2011 K-40 9.72 +/- 1.04 9.53 +/- 0.92 9.63 +/- 0.69 Pass SG-7902, 7903 11/10/2011 Pb-212 3.99 +/- 0.10 3.99 +/- 0.10 3.99 +/- 0.07 Pass SG-7902, 7903 11/10/2011 Pb-214 9.15 +/- 0.23 9.14 +/- 0.21 9.15 +/- 0.16 Pass BS-8033, 8034 11/11/2011 Cs-137 0.03 +/- 0.02 0.03 +/- 0.02 0.03 +/- 0.01 Pass LW-8075, 8076 11/16/2011 Gr. Beta 1.93 +/- 0.62 2.55 +/- 0.64 2.24 +/- 0.44 Pass AP-8193, 8194 11/17/2011 Be-7 0.21 +/-0.11 0.26 +/-0.13 0.24 +/-0.08 Pass F-8663, 8664 11/19/2011 Cs-137 0.03 +/- 0.02 0.03 +/- 0.02 0.03 +/- 0.01 Pass F-8663, 8664 11/19/2011 Gr. Beta 3.55 +/- 0.10 3.71 +/- 0.10 3.63 +/- 0.07 Pass F-8663, 8664 11/19/2011 K-40 3.04 +/- 0.42 3.05 +/- 0.35 3.05 +/- 0.27 Pass DW-20449, 20450 11/28/2011 U-233/4 0.70 +/- 0.20 0.80 +/- 0.20 0.75 +/- 0.14 Pass DW-20449, 20450 11/28/2011 U-238 0.60 +/- 0.20 0.60 +/- 0.20 0.60 +/- 0.14 Pass SWU-8388, 8389 11/29/2011 Gr. Beta 1.66 +/- 0.57 1.65 +/- 0.59 1.66 +/- 0.41 Pass AP-8841, 8842 12/15/2011 Be-7 0.23 +/- 0.12 0.19 +/- 0.09 0.21 +/- 0.07 Pass W-8886, 8887 12/15/2011 Gr. Alpha 0.83 +/- 0.81 1.58 +/- 0.99 1.21 +/- 0.64 Pass W-8886, 8887 12/15/2011 Gr. Beta 6.80 +/- 1.25 5.94 +/- 1.22 6.37 +/- 0.87 Pass W-8886, 8887 12/15/2011 Ra-226 0.23 +/- 0.15 0.41 +/- 0.16 0.32 +/- 0.11 Pass SO-8958, 8959 12/21/2011 K-40 14.58 +/- 0.86 15.07 +/- 0.87 14.83 +/- 0.61 Pass AP-8907, 8908 12/22/2011 Be-7 0.15 +/- 0.06 0.11 +/- 0.07 0.13 +/- 0.05 Pass AP-9196, 9197 12/28/2011 Be-7 0.06 +/- 0.01 0.07 +/- 0.01 0.06 +/- 0.01 Pass LW-9091, 9092 12/29/2011 Gr. Beta 1.97 +/- 0.63 1.74 +/- 0.60 1.86 +/- 0.44 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).

A5-6

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

b Concentration Known Control Lab Code C Date Analysis Laboratory result Activity Limits d Acceptance STW-1237 e 02/01/11 Am-241 0.35 +/- 0.10 0.53 0.37 - 0.69 Fail STW-1237 02/01/11 Co-57 < 0.2 0.00 Pass STW-1237 02/01/11 Co-60 24.10 +/- 0.40 24.60 17.20 -32.00 Pass STW-1237 02/01/11 Cs-134 19.80 +/- 0.40 21.50 15.10 -28.00 Pass STW-1237 02/01/11 Cs-137 29.40 +/- 0.50 29.40 20.60 - 38.20 Pass STW-1237 02/01/11 H-3 238.90 +/- 8.80 243.00 170.00 -316.00 Pass STW-1237 02/01/11 K-40 95.40 +/- 3.10 91.00 64.00 - 118.00 Pass STW-1237 02/01/11 Mn-54 32.50 +/- 0.60 31.60 22.10 -41.10 Pass STW-1237 02/01/11 Ni-63 16.30 +/- 0.60 18.60 13.00 -24.20 Pass STW-1237 02/01/11 Pu-238 1.11 +/- 0.12 1.06 0.75 - 1.38 Pass STW-1237 02/01/11 Pu-239/40 0.88 +/- 0.12 0.81 0.57 - 1.05 Pass STW-1237 02/01/11 Sr-90 8.70 +/- 0.70 8.72 6.10 -11.34 Pass STW-1237 02/01/11 Tc-99 7.60 +/- 0.60 8.99 6.29 -11.69 Pass STW-1237 02/01/11 Zn-65 < 0.5 0.00 Pass STW-1238 02/01/11 Gr. Alpha 0.82 +/- 0.07 1.14 0.34 - 1.93 Pass STW-1238 02/01/11 Gr. Beta 2.82 +/- 0.07 2.96 1.48 -4.44 Pass STVE-1239 02/01/11 Co-57 11.27 +/- 0.21 9.94 6.96 - 12.92 Pass STVE-1 239 02/01/11 Co-60 4.95 +/- 0.16 4.91 3.44 - 6.38 Pass STVE-1 239 02/01/11 Cs-134 5.18 +/- 0.19 5.50 3.85 -7.15 Pass STVE-1239 02/01/11 Cs-137 < 0.09 0.00 Pass STVE-1239 02/01/11 Mn-54 6.91 +/- 0.25 6.40 4.48 - 8.32 Pass STVE-1239 02/01/11 Zn-65 3.10 +/- 0.32 2.99 2.09 - 3.89 Pass STSO-1240 02/01/11 Co-57 984.10 +/- 4.10 927,00 649.00 - 1205.00 Pass STSO-1240 02/01/11 Co-60 540.70 +/- 3.00 482.00 337.00 - 627.00 Pass STSO-1240 02/01/11 Cs-134 726.70 +/- 5.92 680.00 476.00 - 884.00 Pass STSO-1240 02/01/11 Cs-137 883.10 +/- 4.70 758.00 531.00 -985.00 Pass STSO-1240 02/01/11 K-40 622.70 +/- 16.70 540,00 378.00 - 702.00 Pass STSO-1240 02/01/11 Mn-54 -0.30 +/- 1.00 0.00 Pass STSO-1240 02/01/11 Ni-63 384.00 +/- 16.90 582.00 407.00 - 757.00 Fail STSO-1240 02/01/11 U-233/4 166.60 +/- 7.30 176.00 123.00 - 229.00 Pass STSO-1240 02/01/11 U-238 172.00 +/- 7.40 184.00 129.00 - 239.00 Pass STSO-1240 02/01/11 Zn-65 1671.00 +/- 13.10 1359.00 951.00 - 1767.00 Pass STAP-1241 02/01/11 Am-241 0.00 +/- 0.01 0.00 -0.10 -0.10 Pass STAP-1241 02/01/11 Co-57 3.48 +/- 0.06 3.33 2.33 -4.33 Pass STAP-1241 02/01/11 Co-60 0.00 +/- 0.02 0.00 -0.10 -0.10 Pass STAP-1241 02/01/11 Cs-134 3.44 +/- 0.27 3.49 2.44 -4.54 Pass STAP-1241 02/01/11 Cs-1 37 2.46 +/- 0.27 2.28 1.60 -2.96 Pass A6-1

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

Concentration b Known Control Lab Code c Date Analysis Laboratory result Activity Limits 0 Acceptance STAP-1241 02/01/11 Gr. Alpha 0.39 +/- 0.05 0.66 0.20 -1.12 Pass STAP-1241 02/01/11 Gr. Beta 1.54 +/- 0.07 1.32 0.66 - 1.99 Pass STAP-1241 02/01/11 Mn-54 2.90 +/- 0.10 2.64 1.85 - 3.43 Pass STAP-1241 02/01/11 Pu-238 0.07 +/- 0.02 0.10 0.07 - 0.13 Pass STAP-1241 02/01/11 Pu-239/40 0.06 +/- 0.02 0.08 0.05 -0.10 Pass STAP-1241 g 02/01/11 Sr-90 1.89 +/- 0.15 1.36 0.95 - 1.77 Fail STAP-1241 02/01/11 U-233/4 0.13 +/- 0.02 0.18 0.13 -0.23 Pass STAP-1241 02/01/11 U-238 0.14 +/- 0.02 0.19 0.13 -0.24 Pass STAP-1241 02/01/11 Zn-65 3.80 +/- 0.18 3.18 2.23 -4.13 Pass STW-1249 08/01/11 1-129 7.32 +/- 0.30 9.50 6.70 - 12.40 Pass STVE-1250 08/01/11 Co-57 0.01 +/- 0.02 0.00 Pass STVE-1250 08/01/11 Co-60 3.57 +/- 0.13 3.38 2.37 - 4.39 Pass STVE-1250 08/01/11 Cs-134 -0.02 +/- 0.04 0.00 -0.10 -0.10 Pass STVE-1250 08/01/11 Cs-137 5.28 +/- 0.20 4.71 3.30 -6.12 Pass STVE-1250 08/01/11 Mn-54 6.48 +/- 0.22 5.71 4.00 - 7.42 Pass STVE-1250 08/01/11 Zn-65 7.35 +/- 0.34 6.39 4.47 - 8.31 Pass STSO-1251 38/01i/11 Co-57 1333.90 +/- 4.20 1180.00 826.00 -1534.00 Pass STSO-1251 08/01/11 Co-60 701.30 +/- 3.40 644.00 451.00 -837.00 Pass STSO-1251 08/01/11 Cs-134 0.71 +/- 1.05 0.00 Pass STSO-1251 08/01/11 Cs-1 37 1106.00 +/- 5.60 979.00 685.00 -1273.00 Pass STSO-1251 08/01/1 1 K-40 749.20 +/- 19.00 625.00 438.00 -813.00 Pass STSO-1251 08/01/11 Mn-54 984.30 +/- 5.40 848.00 594.00 -1102.00 Pass STSO-1251 08/01/11 Ni-63 0.11; +/- 1.21 0.00 Pass STSO-1251 08/01/11 Pu-238 97.93 +/- 7.40 93.60 65.50 -121,70 Pass STSO-1251 08/01/11 Pu-239/40 78.80 +/- 6.40 77.40 54.20 -100.60 Pass STSO-1251 08/01/11 Sr-90 219.40 +/- 16.70 320.00 224.00 -416.00 Fail STSO-1251 08/01/11 Tc-99 110.00 +/- 8.00 182.00 127.00 -237.00 Fail STSO-1251 08/01/11 U-233/4 267.00 +/- 10.20 263.00 184.00 -342.00 Pass STSO-1251 08/01/11 U-238 280.30 +/- 10.40 274.00 192.00 -356.00 Pass STSO-1251 08/01/11 Zn-65 1639.90 +/- 11.40 1560.00 1092.00 -2028.00 Pass STAP-1252 08/01/11 Co-57 5.06 +/- 0.08 5.09 3.56 - 6.62 Pass STAP-1252 08/01/11 Co-60 3.13 +/- 0.09 3.20 2.24 -4.16 Pass STAP-1252 08/01/11 Cs-i 34 0.01 +/- 0.03 0.00 -0.10 -0.10 Pass STAP-1252 08/01/11 Cs-1 37 2.61 +/- 0.09 2.60 1.82 -3.38 Pass STAP-1252 08/01/11 Mn-54 0.01 +/- 0.03 0.00 -0.10 -0.10 Pass STAP-1252 08/01/11 Pu-238 0.13 +/- 0.02 0.12 0.08 -0.15 Pass STAP-1252 08/01/11 Pu-239/40 0.15 +/- 0.02 0.14 0.10 -0.18 Pass STAP-1252 08/01/11 Sr-90 1.65 +/- 0.16 1.67 1.17 -2.17 Pass A6-2

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

Concentration

• Known Control Lab Code C Date Analysis Laboratory result Activity Limits d Acceptance STAP-1252 08/01/11 U-233/4 0.17 +/- 0.02 0.16 0.11 -0.21 Pass STAP-1252 08/01/11 U-238 0.17 +/- 0.02 0.17 0.12 -0.22 Pass STAP-1252 08/01/11 Zn-65 4.46 +/- 0.23 4.11 2.88 - 5.34 Pass STW-1254 08/01/11 Co-57 37.20 +/- 0.50 36.60 25.60 -47.60 Pass STW-1254 08/01/11 Co-60 28.80 +/- 0.40 29.30 20.50 - 38.10 Pass STW-1254 08/01/11 Cs-134 18.00 +/- 0.60 19.10 13.40 -24.80 Pass STW-1254 08/01/11 Cs-137 0.06 +/- 0.13 0.00 - Pass STW-1254 08/01/11 H-3 1039.90 +/- 17.90 1014.00 710.00 - 1318.00 Pass STW-1254 08/01/11 K-40 161.40 +/- 4.10 156.00 109.00 -203.00 Pass STW-1254 08/01/11 Mn-54 25.70 +/- 0.50 25.00 17.50 -32.50 Pass STW-1254 08/01/11 Ni-63 0.60 +/- 2.00 0.00 - Pass STW-1254 08/01/11 Pu-238 0.04 +/- 0.02 0.02 0.00 -1.00 Pass STW-1254 08/01/11 Pu-239/40 2.27 +/- 0.14 2.40 1.68 -3.12 Pass STW-1254 08/01/11 Sr-90 15.60 +/- 1.80 14.20 9.90 - 18.50 Pass STW-1254 08/01/11 Tc-99 -0.30 +/- 0.50 0.00 - Pass STWV-1254 08/01/11 U-233/4 2.78 +/- 0.20 2.78 1.95 -3.61 Pass STW-1254 08/01/11 U-238 2.86 +/- 0.21 2.89 2.02 -3.76 Pass STW-1254 08/01/11 Zn-65 30.20 +/- 0.90 28.50 20.00 -37.10 Pass STW-1255 08/01/11 Gr. Alpha 0.72 +/- 0.12 0.87 0.26 - 1.47 Pass STW-1255 08/01/11 Gr. Beta 4.71 +/- 0.15 4.81 2.41 - 7.22 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).

MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP. A known value of "zero" indicates an analysis was included in the testing series as a "false positive". MAPEP does not provide control limits.

Result of a repeat analysis was still unacceptable. ERA crosschecks for Am-241 were acceptable, but biased low.

Matrix spikes were prepared, ( 5.17 and 51.7 pCi/L), to verify method; results were acceptable, 4.4 and 47.5 pCi/L.

Am-241 has been added to the internal spike and blank program for 2012.

f An error in percent recovery was found, result of recalculation, 427.3 +/- 18.8 Bq/kg dry.

9 No errors found in calculation or procedure, results of reanalysis; 1.73 Bq/filter.

h The analyses were repeated through a strontium column; mean result of triplicate analyses, 304.2 Bqtkg.

The lab does not currently analyze soil for Tc-99, but is evaluating the procedure. After consultation with Eichrom, the analysis was repeated using a matrix spike correction. Mean result of triplicate reanalyses; 183.3 Bq/kg.

A6-3

TABLE A-7. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.

Concentration (pCi/L) b Lab Code b Date Analysis Laboratory ERA Control Result C Result d Limits Acceptance STAP-1230 03/21/11 Am-241 46.0 +/- 1.8 62.5 36.6 - 85.7 Pass STAP-1230 03/21/11 Co-60 401.2 +/- 12.1 390.0 302.0 - 487.0 Pass STAP-1230 03/21/11 Cs-134 268.2 +/- 24.8 279.0 182.0 -345.0 Pass STAP-1230 03/21/11 Cs-1 37 345.3 +/- 24.9 312.0 234.0 -410.0 Pass STAP-1230 03/21/11 Mn-54 < 1.9 0.0 Pass STAP-1230 03/21/11 Pu-238 76.1 +/- 3.2 69.0 47.4 - 90.7 Pass STAP-1230 03/21/11 Pu-239/40 70.50 +/- 3.10 65.5 47.5 - 85 Pass STAP-1230 03/21/11 Sr-90 208.40 +/- 18.70 185.0 81.4 -288 Pass STAP-1230 03/21/11 U-233/4 56.10 +/- 2.10 61.5 38.7 - 91 Pass STAP-1230 03/21/11 U-238 58.90 +/- 2.60 61.0 39.0 - 87 Pass STAP- 1230 03/21/11 Uranium 118.50 +/- 5.52 125.0 63.9 - 199 Pass STAP-1230 03121111 Zn-65 312.60 +/- 23.40 279.0 193.0 -386 Pass STAP-1231 03/21/11 Gr. Alpha 88.40 +/- 3.70 74.3 38.5 -112 Pass STAP-1231 03/21/11 Gr. Beta 85.10 +/- 2.80 69.5 42.8 - 102 Pass STSO-1232 03/21/11 Ac-228 1327.8 +/- 97.5 1490.0 958.0 -2100.0 Pass STSO-1232 03/21/11 Am-241 662.8 +/- 88.1 914.0 546.0 -1170.0 Pass STSO-1 232 03/21/11 Bi-212 1396.2 +/- 185.3 1400.0 368.0 -2090.0 Pass STSO-1232 03/21/11 Bi-214 841.1 +/- 33.2 725.0 445.0 -1040.0 Pass STSO-1232 03/21/11 Co-60 2423.7 +/- 27.1 2220.0 1620.0 -2980.0 Pass STSO-1232 03/21/11 Cs-134 2481.3 +/- 42.2 2450.0 1580.0 -2950.0 Pass STSO-1232 03/21/11 Cs-137 2108.2 +/- 30.2 1920.0 1470.0 -2490.0 Pass STSO-1232 03/21/11 K-40 11497.3 +/- 276.6 11500.0 8320.0 -15600.0 Pass STSO-1232 03/21/i1 Mn-54 < 17.4 0.0 Pass STSO-1232 03/21/1i Pb-212 994.7 +/- 30.0 1440.0 931.0 -2030.0 Pass STSO-1232 03/21/11 Pb-214 918.3 +/- 42.6 805.0 482.0 -1200.0 Pass STSO-1232 03/21/11 Pu-238 1593.6 +/- 156.7 1420.0 813.0 -2000.0 Pass STSO-1232 03/21/11 Pu-239/40 1428,9 +/- 143.4 1400.0 956.0 -1860.0 Pass STSO-1232 03/21/11 Sr-90 8638.0 +/- 442.8 7590.0 2740.0 - 12400.0 Pass STSO-1232 03/21/11 Th-234 1350.1 +/- 180.0 962.0 305.0 -1830.0 Pass STSO-1232 03/21/11 U-233/4 748.0 +/- 94.4 972.0 616.0 - 1210.0 Pass STSO-1232 03/21/11 U-238 909.0 +/- 104.9 962.0 588.0 - 1220.0 Pass STSO-1232 03/21/11 Uranium 1690.8 +/- 104.9 1980.0 1130.0 -2670.0 Pass STSO-1 232 03/21/11 Zn-65 2356.2 +/- 57.1 1990.0 1580.0 -2670.0 Pass A7-1

TABLE*A-7. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA) 8 .

Concentration (pCi/L) b Lab Code b Date Analysis Laboratory ERA Control Result C Result a Limits Acceptance STVE-1233 03/21/11 Am-241 2377.5 +/- 83.2 3200.0 1820.0 -4400.0 Pass STVE-1233 03/21/11 Cm-244 602.9 +/- 38.4 812.0 400.0 - 1260.0 Pass STVE-1233 03/21/11 Co-60 810.2 +/- 32.4 733.0 496.0 - 1050.0 Pass STVE-1233 03/21/11 Cs-134 849.4 +/- 54.5 770.0 441.0 - 1070.0 Pass STVE-1233 03/21/11 Cs-137 889.9 +/- 36.3 829.0 608.0 -1150.0 Pass STVE-1233 03/21/11 K-40 28146.70 +/- 698.80 25800.0 18500.0 - 36500 Pass STVE-1233 03/21/11 Mn-54 < 19.3 0.0 Pass STVE-1233 03/21/11 Pu-238 3068.10 +/- 170.70 2990.0 1610.0 -4380 Pass STVE-1233 03/21/11 Pu-239/40 3180.00 +/- 88.90 3100.0 1920.0 -4230 Pass STVE-1233 03/21/11 Sr-90 8549.20 +/- 675.00 7890.0 4410.0 - 10500 Pass STVE-1233 03/21/11 U-233/4 2418.60 +/- 142.5C 2610.0 1790.0 - 3460 Pass STVE-1233 03/21/11 U-238 2417.00 +/- 142.50 2590.0 1820.0 - 3270 Pass STVE-1233 03/21/11 Uranium 4929.80 +/- 142.50 5320.0 3660.0 - 6860 Pass STVE-1233 03/21/11 Zn-65 962.40 +/- 62.50 799.0 577.0 - 1090 Pass STW-1234 03/21/11 Am-241 '00.0 +/-6.4 135.0 92.5 - 182.0 Pass STW-1234 03/21/11 Co-60 401.6 +/-7.2 411.0 358.0 - 486.0 Pass STW-1234 03/21/11 Cs-1 34 222.7 +/- 12.3 231.0 171.0 -265.0 Pass STW-1234 03/21/11 Cs-137 410.3 + 9.5 417.0 354.0 - 500.0 Pass STW-1234 03/21/11 Mn-54 < 3.0 0.0 Pass STW-1234 03/21/11 Pu-238 130.9 +/- 5.5 131.0 99.1 -162.0 Pass STW-1234 03/21/11 Pu-239/40 113.0 +/-5.0 119.0 92.1 -147.0 Pass STW-1234 03/21/11 Sr-90 739.6 +/- 13.0 773.0 491.0 - 1030.0 Pass STW-1234 03/21/11 U-233/4 83.4 +/- 3.8 94.3 71.1 -122.0 Pass STW-1234 03/21/11 U-238 85.5 +/- 3.9 93.5 71.4 -116.0 Pass STW-1234 03/21/11 Uranium 172.0 +/- 8.5 192.0 138.0 -256.0 Pass STW-1234 03/21/11 Zn-65 114.5 +/- 10.8 111.0 94.1 - 138.0 Pass STW-1235 03/21/11 Gr. Alpha 97.6 +/- 2.9 112.0 49.7 - 166.0 Pass STW-1235 03/21/11 Gr. Beta 99.6 +/- 2.0 99.8 58.4 - 146.0 Pass STW-1236 03/21/11 H-3 16307.0 +/- 377.0 15200.0 9900.0 -22500,0 Pass 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 follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation). Results are reported in units of pCi/L, except for air filters (pCi/Filter), vegetation and soil (pCi/kg).

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

d Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA. A known value of "zero" indicates an analysis was included in the testing series as a "false positive". Control limits are not provided.

A7-2

APPENDIX B DATA REPORTING CONVENTIONS B-1

Data Reportinq 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 = 2a 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 iower limit of detection based on 4.66cy uncertainty for a background sample.

3.0. Duplicate analyses If duplicate analyses are reported, the convention is as follows.

3.1 Individual results: For two analysis results; x1 +/- s 1 and x2 +/- s2 Reported result: x +/-s; where x = (1/2) (xi + x 2) ands= (1/2) 1s2 3.2. Individual results: < Li, < L2 Recorted 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 x1, x2 ... xn are defined as follows:

xn I 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 numbers 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)

-3 Gross alpha I x 10 Strontium-89 8,000 Gross beta Strontium-90 500

-1 b

Iodine-1 31 2.8 x 10 Cesium-1 37 1,000 Barium-140 8,000 Iodine-1 31 1,000 Potassium-40 4,000 Gross alpha 2 Gross beta 10 6

Tritium 1 x 10 a

Taken from Table 2 of Appendix B to Code of Federal Regulations Title 10, Part 20, and appropriate footnotes.

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

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 2011 was completed during September and October of 2011. 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 September 9 th, 2011 for water use downstream of the DAEC to Cedar Rapids. This survey identified no new usages of river water from previous surveys. Recreational fishing is the only identified food pathway use of Cedar River water between the DAEC and the City of Cedar Rapids eight miles down-river.

There were 114 vegetable gardens identified during the performance of the 2011 Census. This number is more than the number of gardens found in the 2010 survey by 39. The distance to the nearest vegetation receptor changed in one sector. In the sector towards the east-north-east, a new garden was identified at 2470 meters.

This is compares of a distance of 2790 meters in that sector in 2010. There were no other changes to the locations of the nearest vegetable receptors.

There were five new cattle herds observed and in one location, cattle were discontinued. Cattle were replaced by goats at another location. There was one other new goat heard detected. There were no observed changes in milk cow locations.

There were 2 instances where there was a change in the location of the nearest resident in each sector.

" In the sector towards the south, a house heavily damaged by the 2008 flood was demolished. The distance to the nearest resident in the sector changed from 2200 meters to 3800 meters.

" In the sector towards the south-south-east, a house heavily damaged by the 2008 flood was demolished. The distance to the nearest resident changed from 2380 meters to 3020 meters.

Since the last performance of the land use census, a new drinking water well has been identified within a two mile radius of the site. The well is located 3,200 meters D-2

towards the South East. The well is on the opposite side of the Cedar River and not hydrologically relevant to our 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.

NextEra Energy Resources, 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 samp!es collected by the DAEC's Radiological Environmental Monitoring Program (REMP) or the site Ground Water Protection Program (GWPP) above the threshold concentration levels for reporting.

Errata to the 2009 Report The opening paragraph of Appendix D of the 2009 Annual Radiologica.]

Environmental Operating Report was incorrect, referencing 2008 rather than 2009.

The opening paragraph should have been:

The Duane Arnold Energy Land Use Census for 2009 was completed during September and October of 2009. All milk animals, residences and gardens greater than 500 square feet were identified within three miles for each of the 16 meteorologicalsectors. If none were identified within the three mile range, additionalsurveys were performed out to a distance of five miles.

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 2011 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 and 1 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

1. 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".

2. 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.

Results of the MIDAS dose calculations are displayed' below.

1. There were no releases of radioactive material to liquid effluents in 2011.

2. The maximum dose to air at the site boundary from noble gases released was 0.000225 mrad from gamma radiation at 481 meters towards the South-South-East.

3. The maximum dose to air at the site boundary from noble gases released was 0.000041 mrad beta radiation at 2416 meters towards the East-North-East.

4. The whole body dose equivalent to the hypothetical maximally exposed individual from noble gases was 0.000260 mrem, at 805 meters towards the West.

5. The skin dose equivalent to the hypothetical maximally exposed individual from noble gases was 0.000270 mrem, at 805 meters towards the West.

6. 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 to the West, with an estimated dose equivalent of 0.00736 mrem.

7. The hypothetical maximally exposed organ due to airborne carbon-14 was the bone of a child located 2.9 miles to the West-North-West of the site. The dose is 0.11 mrem.

E-2

Carbon14 The estimate of gaseous carbon-14 (C-14) released from the Duane Arnold Energy Center was derived using guidance from the EPRI document, "Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents", Report 1021106, issued December 2010. The total amount of C-14 released in 2011 was estimated to be 9.50 Curies.

Using the dose calculation methodology from Regulatory Guide 1.109, the resultant maximally exposed receptor organ from C-14 is the bone of a child, located 2.9 miles to the West-North-West of the site. The dose is 1.01 E-01 mrem. (0.11 mrem).

==

Conclusion:==

No measurable dose due to the operation of the DAEC was detected by environmental TLDs in 2011. 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 2011 Type Age Distance Direction Dose or Dose Equivalent Annual 10 CFR 50, Group (meters) (mrem) Appendix I "Limit" Direct Radiation None (as measured by TLDs)

Liquid Releases Whole Body Dose Child S None 3 mrem Organ Dose Child - S None 10 mrem Liver Noble Gas Gamma Air Dose 481 SSE 0.000225 mrad 10 mrad Beta Air Dose 2416 ENE 0.000041 mrad 20 mrad

'Ahole Body All 805 W 0.000260 mrem 5 mrem Skin Child 805 W 0.000270 mrem 15 mrem Particulates & lodines Organ Dose Child - 805 W 0.00736 mrem 15 mrem Thyroid Carbon 14 Organ Dose Child- 4700 WNW 0.11 mrem 15 mrem Bone

- -=

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

4 *L, nvironmental, Inc.

Madwt boratory phone (847) 564-0700

• fax (647) 564-4517 DUANE ARNOLD ENERGY CENTER CEDAR RAPIDS, IOWA Docket No. 50-331 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)

ANNUAL REPORT - PART II DATA TABULATIONS AND ANALYSES January 1 to December 31, 2011 Prepared by ATI ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8001 1~~

Reviewed and Approved Bronia Grob, M.S.

Laboratory Manager

TABLE OF CONTENTS Section Page Lis t o f T a b le s ......................................... I.............................................................. . . iii 1.0 INTRODUCTIO N ...................................................................................................... v 2.0 PROG RAM DEVIATIONS ....................................................................................... vi 3.0 DATA TABLES ...................................................................................................... vii Appendices A Supplem ental Analyses ....................................................................................... A-1 ii

LIST OF TABLES No. Title Paqe 1 Airborne particulates and iodine, Location D-3, analyses for gross beta and iodine-131 ............... 1-1 2 Airborne particulates and iodine, Location D-5, analyses for gross beta and iodine-131 ............... 2-1 3 Airborne particulates and iodine, Location D-6, analyses for gross beta and iodine-1 31 ............... 3-1 4 Airborne particulates and iodine, Location D-7, analyses for gross beta and iodine-131 ............... 4-1 5 Airborne particulates and iodine, Location D-11, analyses for gross beta and iodine-131 ............. 5-1 6 Airborne particulates and iodine, Location D-13, analyses for gross beta and iodine-131 ............. 6-1 7 Airborne particulates and iodine, Location D-15, analyses for gross beta and iodine-131 ............. 7-1 8 Airborne particulates and iodine, Location D-16, analyses for gross beta and iodine-131 ............. 8-1 9 Airborne particulates and iodine, Location D-40, analyses for gross beta and iodine-131 ............. 9-1 10 Airborne particulate composite samples, analysis for gamma-emitting isotopes ......................... 10-1 11 Ambient gamma radiation by thermoluminescent dosimeters (TLD), quarterly exposure ............. 11-1 12 Milk samples, analysis for iodine-131 and gamma emitting isotopes ............................................ 12-1 13 Ground water 13.1 Area wells, analysis for gross beta and tritium .................................................................. 13-1 13.2 On-site monitoring wells, analysis for gross beta and tritium ............................................ 13-2 14 Vegetation samples (broadleaf), analysis for iodine-131 and gamma-emitting isotopes .............. 14-1 15 Vegetation samples (hay and grain), analysis for gamma-emitting isotopes ................................ 15-1 16 Surface water samples, analysis for tritium and gamma-emitting isotopes ................................... 16-1 17 Surface water composites, analysis for strontium-89 and strontium-90 ........................................ 17-1 18 Fish samples, analysis for gamma-emitting isotopes ................................................................... 18-1 19 River sediment samples, analysis for gamma-emitting isotopes ................................................... 19-1 20 Precipitation 20.1 Precipitation, monthly collections, analysis for gamma-emitting isotopes ........................ 20-1 20.2 Precipitation, quarterly composites of monthly samples, analysis for tritium .................... 20-1 21 Soil samples, analysis for strontium-90 and gamma-emitting isotopes ......................................... 21-1 In addition the following tables may be found in Appendix A.

A-1 Precipitation samples (GWPP), analysis for tritium ........................................................................ A-2 A-2 Precipitation composites (GWPP), analysis for gamma emitting isotopes ...................................... A-3 A-3 Groundwater (REMP), analysis for gamma emitting isotopes ......................................................... A-4 A-4 Groundwater (GWPP), analysis for hard to detect isotopes ....................................................... A-5 A-5 Surface water (GWPP), analysis for hard to detect isotopes .................................................... A-5 A-6 Airborne Iodine-131 detected in charcoal cartridges ...................................................................... A-6 iii

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 2011. 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 required values for lower limits of detection (LLD) for gamma emitting isotopes are established through the Offsite Dose Assessment Manual (ODAM). Naturally occurring radioisotopes, such as Be-7, K-40 and Ra daughters, are frequently detected, but may not be listed for every sample medium.

iv

2.0 PROGRAM DEVIATIONS Sample Collection Date Type Analysis Location(s) or Period Comments AP/AI Gross Beta / Gamma D-7 1-13-11 Low volume, sampler run-time 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.

AP/Al Gross Beta / Gamma D-6, 13 5-12-11 Reduced run-times due to electrical storms.

AP/AI Gross Beta / Gamma D-6 6-9-11 Reduced run-time due to electrical storms.

AP/AI Gross Beta / Gamma D-6 6-16-11 Power out due to electrical storms.

AP/AI Gross Beta / Gamma D-40 7-7-11 Out of service, voltage supply problems.

AP/AI Gross Beta / Gamma D-3 8-4-11 Reduced run-time due to construction in area.

SW H-3 / Gamma D-99 1-18-11 No sample; water frozen.

TLD Ambient Gamma D-37 2nd Qtr. 2011 TLD missing in the field.

TLD Ambient Gamma D-48 3rd Qtr. 2011 Not collected until 4th Qtr., 2011.

WW H3 D-1 11, D-1 13 7-30-11 MW-01A, MW-03A, MW-05A D-1 15 Samples Lost in Transit WW H3 D-113, D-115 8-15-11 MW-03A, MW-03B, MW-05A, MW-05B Samples Lost in Transit In no instance did missed analyses affect minimum sampling requirements as specified in the ODAM.

V

3.0 DATA TABLES vi

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

Location: D-33 (Hiawatha)

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

Date Volume Date Volume Collected (m") Gross Beta Collected (m") Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 273 0.060 +/- 0.005 07-07-11 268 C 0.032 +/- 0.004 01-13-11 238 0.034 +/- 0.004 07-14-11 269 0.031 +/- 0.004 01-20-11 247 0.050 +/- 0.005 07-21-11 265 0.040 +/- 0.004 01-27-11 215 0.064 +/- 0.006 07-28-11 262 0.028 +/- 0.004 02-03-11 293 0.028 +/- 0.004 d

08-04-11 164 0.056 +/- 0.006 02-10-11 292 0.035 + 0.004 08-12-11 263 0.033 +/- 0.004 02-17-11 291 0.031 + 0.004 08-18-11 237 0.029 +/- 0.004 02-24-11 290 0.020 + 0.003 08-25-11 285 0.029 +/- 0.003 03-03-11 292 0.029 + 0.004 09-01-11 295 0.027 +/- 0.003 03-10-11 291 0.020 + 0.003 09-08-11 286 0.026 +/- 0.003 03-17-11 290 0.021 +/- 0.003 09-16-11 325 0.025 +/- 0.003 b

03-24-11 289 0.028 + 0.004 09-22-11 243 0.023 +/- 0.004 b

03-31-11 293 0.055 + 0.005 09-29-11 285 0.019 +/- 0.003 1st Quarter Mean +/- s.d. 0.037 +/- 0.015 3rd Quarter Mean +/- s.d. 0.031 +/- 0.009 b

04-07-11 288 0.028 + 0.004 10-06-11 283 0.027 +/- 0.004 04-14-11 292 0.022 + 0.003 10-13-11 286 0.036 +/- 0.004 04-21-11 287 0.020 +/- 0.003 10-20-11 284 0.015 +/- 0.003 04-28-11 291 0.013 + 0.003 10-27-11 288 0.032 +/- 0.004 11-03-11 292 0.027 +/- 0.003 05-05-11 267 0.016 +/- 0.003 05-12-11 262 0.020 +/- 0.004 11-10-11 293 0.030 +/- 0.004 05-18-11 229 0.013 +/- 0.003 11-17-11 290 0.028 +/- 0.004 05-26-11 307 0.018 +/- 0.003 11-23-11 250 0.024 +/- 0.004 06-02-11 265 0.019 +/- 0.003 12-01-11 329 0.034 +/- 0.003 06-09-11 267 0.033 + 0.004 12-08-11 293 0.039 +/- 0.004 06-16-11 262 0.014 +/- 0.003 12-15-11 295 0.033 +/- 0.004 06-23-11 263 0.017 + 0.003 12-21-11 246 0.047 +/- 0,005 06-30-11 265 0.019 +/- 0.003 12-29-11 333 0.026 +/- 0.003 2nd Quarter Mean +/- s.d. 0.019 +/- 0.006 4th Quarter Mean +/- s.d. 0.031 +/- 0.008 Cumulative Average 0.029 Previous Annual Average 0.029 a Iodine-131 concentrations are < 0.03 pCi/mi3 unless noted otherwise.

b Air iodine activity detected; noted in Appendix A.

' Corrected volume.

d Low volume due to construction at air sampler site.

1-1

DUANE ARNOLD Table 2. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-1318.

Location: D-5 (Palo)

Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m") Gross Beta Collected (mW) Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 326 0.050 +/- 0.004 07-07-11 286 0.033 +/- 0.004 01-13-11 275 0.030 +/- 0.004 07-14-11 288 0.028 +/- 0.003 01-20-11 278 0,047 +/- 0.004 07-21-11 287 0.034 +/- 0,004 01-27-11 277 0.046 +/- 0.004 07-28-11 282 0.028 +/- 0.004 02-03-11 282 0.030 +/- 0.004 08-04-11 283 0.041 +/- 0.004 02-10-11 280 0.032 +/- 0.004 08-12-11 336 0.025 +/- 0.003 02-17-11 277 0.030 +/- 0.004 08-18-11 243 0.036 +/- 0.004 02-24-11 277 0.018 +/- 0.003 08-25-11 295 0.030 +/- 0.003 03-03-11 295 0.029 +/- 0.004 09-01-11 284 0.014 +/- 0.003 03-10-11 294 0.025 +/- 0.003 09-08-11 292 0,025 +/- 0.003 03-17-11 294 0.022 +/- 0.003 09-16-11 330 0.027 +/- 0.003 b

03-24-11 290 0.040 +/- 0.004 09-22-11 250 0.024 +/- 0.004 b

03-31-11 295 0.056 +/- 0.005 09-29-11 290 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.035 +/- 0.011 3rd Quarter Mean +/- s.d. 0.028 +/- 0.007 b

04-07-11 294 0.032 +/- 0.004 10-06-11 290 0.027 +/- 0.004 04-14-11 293 0.025 +/- 0.003 10-13-11 292 0.041 +/- 0.004 04-21-11 292 0.019 +/- 0.003 10-20-11 290 0.017 +/- 0,003 04-28-11 266 0.011 +/- 0.003 10-27-11 294 0.036 +/- 0.004 11-03-11 293 0.028 +/- 0.004 05-05-11 233 0.020 +/- 0.004 C

05-12-11 294 0.020 +/- 0.003 11-10-11 287 < 0.003 05-18-11 245 0.014 +/- 0.003 11-17-11 281 0,042 +/- 0.004 05-26-11 330 0.016 +/- 0.003 11-23-11 238 0.028 +/- 0.004 06-02-11 284 0.Q21 +/- 0.003 12-01-11 315 0.038 +/- 0.004 06-09-11 280 0.031 +/- 0.004 12-08-11 288 0.037 +/- 0.004 06-16-11 284 0.013 +/- 0.003 12-15-11 279 0.053 +/- 0.005 06-23-11 284 0.019 +/- 0.003 12-21-11 240 0.043 +/- 0.005 06-30-11 284 0.017 +/- 0.003 12-29-11 324 0.030 +/- 0.003 2nd Quarter Mean +/- s.d. 0.020 +/- 0.006 4th Quarter Mean +/- s.d. 0.035 +/- 0.010 Cumulative Average 0,030 Previous Annual Average 0.030 a Iodine-1 31 concentrations are < 0.03 pCi/m 3 unless noted otherwise.

Air iodine activity detected; noted in Appendix A.

Run time estimated; timer bad.

d Filter light.

2-1

DUANE ARNOLD Table 3. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a, Location: D-6 (Center Point) 3 Units: pCi/rn Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (m") Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 342 0.050 +/- 0.004 07-07-11 293 0.030 +/- 0.004 01-13-11 290 0.038 +/- 0.004 07-14-11 288 0.031 +/- 0.004 01-20-11 293 0.054 +/- 0.005 07-21-11 298 0.042 +/- 0.004 01-27-11 293 0.056 +/- 0.005 07-28-11 279 0.028 +/- 0.004 02-03-11 299 0.036 +/- 0.004 08-04-11 293 0.040 +/- 0.004 02-10-11 294 0.039 +/- 0.004 08-12-11 341 0.024 +/- 0.003 02-17-11 294 0.033 +/- 0.004 08-18-11 244 0.030 +/- 0.004 02-24-11 299 0.019 +/- 0.003 08-25-11 286 0.030 +/- 0.004 03-03-11 300 0.027 +/- 0.003 09-01-11 291 0.008 +/- 0,002 03-10-11 300 0.018 +/- 0.003 09-08-11 283 0.028 +/- 0.004 03-17-11 300 0.024 +/- 0.003 09-16-11 310 0.024 +/- 0.003 b 233 0.026 +/- 0.004 03-24-11 248 0.026 +/- 0.004 09-22-11 b

03-31-11 293 0.053 +/- 0.004 09-29-11 260 0.014 +/- 0.003 1st Quarter Mean +/- s.d. 0.036 +/- 0.013 3rd Quarter Mean +/- s.d. 0.027 +/- 0.009 04-07-11 289 0.027 +/- 0.004 b 10-06-11 277 0.023 +/- 0,004 C

04-14-11 291 0.021 +/- 0.003 10-13-11 279 0.038 +/- 0.004 C

04-21-11 291 0.022 +/- 0.003 10-20-11 288 0.018 +/- 0.003 C

04-28-11 292 0.012 +/- 0.003 10-27-11 288 0.032 +/- 0.004 11-03-11 283 0.027 +/- 0.004 C

05-05-11 292 0.011 +/- 0.003 228 C 0,024 +/- 0.004 d 11-10-11 284 0,031 +/- 0.004 05-12-11 05-18-11 229 0.015 +/- 0.004 11-17-11 281 0.029 +/- 0,004 05-26-11 338 0.014 +/- 0.003 11-23-11 243 0.024 +/- 0.004 06-02-11 297 0.021 +/- 0.003 12-01-11 320 0.026 +/- 0.003 06-09-11 268 0.034 +/- 0.004 d 12-08-11 285 0.041 +/- 0.004 06-16-11 NDO 12-15-11 285 0.044 +/- 0.004 06-23-11 257 ' 0.018 +/- 0.003 f 12-21-11 240 0.049 +/- 0.005 06-30-11 301 0.018 +/- 0.003 12-29-11 324 0.024 +/- 0.003 2nd Quarter Mean +/- s.d. 0.020 +/- 0,007 4th Quarter Mean +/- s.d. 0.031 +/- 0.009 Cumulative Average 0.029 Previous Annual Average 0.030 a lodine-131 concentrations are < 0.03 pCi/im3 unless noted otherwise.

6 Air iodine activity detected; noted in Appendix A.

c Corrected volume.

d Low volume due to power outage from storms.

e ND = No data; see Table 2.0, Listing of Missed Samples.

f Low volume due to recent power restoration.

3-1

DUANE ARNOLD Table 4. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location: D-7 (Shellsburg) 3 Units: pCi/m Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ms) Gross Beta Collected (m") Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 207 0.067 +/- 0.006 07-07-11 303 0.028 +/- 0.004 b

01-13-11 133 0.065 +/- 0.008 07-14-11 285 0.029 +/- 0.004 01-20-11 257 0.052 +/- 0.005 07-21-11 291 0.034 +/- 0.004 01-27-11 296 0.050 +/- 0.004 07-28-11 299 0.024 +/- 0.003 02-03-11 298 0.032 +/- 0.004 08-04-11 299 0,035 +/- 0.004 02-10-11 297 0.034 +/- 0.004 08-12-11 349 0.027 +/- 0.003 02-17-11 296 0.031 +/- 0.004 08-18-11 258 0.037 +/- 0.004 02-24-11 295 0.021 +/- 0.003 08-25-11 306 0.033 +/- 0.004 03-03-11 297 0.033 +/- 0.004 09-01-11 302 0.036 +/- 0.004 03-10-11 297 0.025 +/- 0,003 09-08-11 303 0.013 +/- 0.003 03-17-11 291 0.029 +/- 0.003 09-16-11 343 0.020 +/- 0.003 C

03-24-11 294 0.042 +/- 0.004 09-22-11 260 0.025 +/- 0.004 C

03-31-11 297 0.057 +/- 0.005 09-29-11 298 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.041 +/- 0.016 3rd Quarter Mean +/- s.d. 0.028 +/- 0.007 C

04-07-11 281 0.032 +/- 0.004 10-06-11 302 0.035 +/- 0.004 04-14-11 297 0.025 +/- 0.003 10-13-11 304 0.037 +/- 0.004 04-21-11 296 0.017 +/- 0.003 10-20-11 301 0.020 +/- 0.003 04-28-11 305 0.011 +/- 0.003 10-27-11 305 0.036 +/- 0.004 11-03-1 1 301 0.026 +/- 0.003 05-05-11 304 0.015 +/- 0.003 05-12-11 298 0.017 +/- 0.003 11-10-11 300 0.030 +/- 0.004 05-18-11 261 0.011 +/- 0.003 11-17-11 278 0.037 +/- 0.004 05-26-11 318 0.011 +/- 0.003 11-23-11 258 0.022 +/- 0.004 06-02-11 301 0.017 +/- 0.003 12-01-11 334 0.038 +/- 0.004 06-09-11 303 0.028 +/- 0.003 12-08-11 302 0.038 +/- 0.004 06-16-11 301 0.012 +/- 0.003 12-15-11 278 0.047 +/- 0.004 06-23-11 301 0.017 +/- 0.003 12-21-11 246 0.047 +/- 0.005 06-30-11 303 0.013 +/- 0.003 12-29-11 341 0.027 +/- 0.003 2nd Quarter Mean +/- s.d. 0.017 +/- 0.007 4th Quarter Mean +/- s.d. 0.034 +/- 0.008 Cumulative Average 0.030 Previous Annual Average 0.030 a lodine-131 concentrations are < 0.03 pCi/m 3 unless noted otherwise.

b Low volume due to low run time of 79.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

cAir iodine activity detected; noted in Appendix A.

4-1

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

Location: D-11 (Toddville)

Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m") Gross Beta Collected (ma) Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 322 0.051 +/- 0.004 07-07-11 301 0.025 +/- 0.003 01-13-11 273 0.031 +/- 0.004 07-14-11 304 0.024 +/- 0.003 01-20-11 276 0.054 +/- 0.005 07-21-11 300 0.034 +/- 0,004 01-27-11 276 0.058 +/- 0.005 07-28-11 285 0.024 +/- 0.003 02-03-11 279 0.031 +/- 0.004 08-04-11 287 0.031 +/- 0.004 02-10-11 277 0.040 +/- 0,004 08-12-11 337 0.026 +/- 0.003 02-17-11 277 0.034 +/- 0.004 08-18-11 246 0.033 +/- 0.004 02-24-11 287 0.018 +/- 0.003 08-25-11 289 0.033 +/- 0.004 03-03-11 288 0.032 +/- 0.004 09-01-11 295 0.028 +/- 0.003 03-10-11 289 0.023 +/- 0,003 09-08-11 291 0.028 +/- 0.004 03-17-11 287 0,027 +/- 0.003 09-16-11 333 0.026 +/- 0.003 03-24-11 288 0.037 +/- 0.004 b 09-22-11 248 0.016 +/- 0.003 03-31-11 290 0,052 +/- 0.004 b 09-29-11 289 0.020 +/- 0.003 1st Quarter Mean +/- s.d. 0.038 +/- 0.013 3rd Quarter Mean +/- s.d. 0.027 +/- 0.005 04-07-11 223 0.040 +/- 0.005 b 10-06-11 291 0.026 +/- 0.004 04-14-11 213 0.033 +/- 0.004 10-13-11 292 0.040 +/- 0.004 04-21-11 255 0.018 +/- 0.003 10-20-11 290 0.017 +/- 0.003 04-28-11 232 0.012 +/- 0.003 10-27-11 294 0.037 +/- 0.004 11-03-11 292 0.030 +/- 0.004 05-05-11 247 0.018 +/- 0.003 05-12-11 247 0.021 +/- 0.004 11-10-11 275 0.034 +/- 0.004 05-18-11 259 0.015 +/- 0.003 11-17-11 273 0.037 +/- 0.004 05-26-11 347 0.018 +/- 0.003 11-23-11 236 0.026 +/- 0.004 06-02-11 297 0.018 +/- 0.003 12-01-11 310 0.031 +/- 0.003 06-09-11 305 0.031 +/- 0.004 12-08-11 276 0.025 +/- 0.004 06-16-11 294 0.013 +/- 0.003 12-15-11 276 0.037 +/- 0.004 06-23-11 297 0.017 +/- 0.003 12-21-11 232 0.050 +/- 0.005 06-30-11 297 0.015 +/- 0.003 12-29-11 314 0.023 +/- 0.003 2nd Quarter Mean +/- s.d. 0,021 +/- 0.009 4th Quarter Mean +/- s.d. 0.032 +/- 0.009 Cumulative Average 0.029 Previous Annual Average 0.025 8 Iodine-131 concentrations are < 0.03 pCi/mr3 unless noted otherwise.

bAir iodine activity detected; noted in Appendix A.

5-1

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

Location: D-13 (Alburnett) 3 Units: pCi/m Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (md) Gross Beta Collected (ms) Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 287 0.049 +/- 0.004 07-07-11 286 0.031 +/- 0,004 01-13-11 248 0.034 +/- 0.004 07-14-11 285 0.034 +/- 0.004 01-20-11 256 0,049 +/- 0.005 07-21-11 286 0.040 +/- 0.004 01-27-11 237 0.041 +/- 0.005 07-28-11 278 0.025 +/- 0,003 02-03-11 252 0.030 +/- 0.004 08-04-11 284 0.040 +/- 0.004 02-10-11 262 0.034 +/- 0.004 08-12-11 328 0.026 +/- 0.003 02-17-11 262 0.036 +/- 0.004 08-18-11 246 0.028 +/- 0.004 02-24-11 290 0.020 +/- 0.003 08-25-11 286 0.027 +/- 0.003 03-03-11 291 0.035 +/- 0.004 09-01-11 292 0.024 +/- 0.003 03-10-11 291 0.026 +/- 0.003 09-08-11 289 0.025 +/- 0.003 03-17-11 291 0.027 +/- 0.003 09-16-11 329 0.022 +/- 0.003 b

03-24-11 289 0.037 +/- 0.004 09-22-11 245 0.013 +/- 0.003 b

03-31-11 293 0.049 +/- 0.004 09-29-11 287 0.021 +/- 0.003 1 st Quarter Mean +/- s.d. 0.036 +/- 0.009 3rd Quarter Mean +/- s.d. 0.027 +/- 0.007 b

04-07-11 289 0.035 +/- 0.004 10-06-11 288 0.026 +/- 0.004 04-14-11 286 0.023 +/- 0.003 10-13-11 289 0.040 +/- 0.004 04-21-11 293 0.022 +/- 0.003 10-20-11 286 0.018 +/- 0.003 04-28-11 293 0.011 +/- 0.003 10-27-11 291 0.031 +/- 0.004 11-03-11 287 0.027 +/- 0.004 05-05-11 292 0.017 +/- 0.003

¢ 05-12-11 194 0.035 +/- 0.005 11-10-11 288 0.034 +/- 0.004 05-18-11 250 0.017 +/- 0.003 11-17-11 286 0.036 +/- 0.004 05-26-11 330 0.017 +/- 0.003 11-23-11 245 0.021 +/- 0.004 06-02-11 285 0.021 +/- 0.003 12-01-11 336 0,034 +/- 0.003 06-09-11 285 0.025 +/- 0.003 12-08-11 299 0.040 +/- 0.004 06-16-11 284 0.015 +/- 0.003 12-15-11 300 0.041 +/- 0.004 06-23-11 284 0.021 +/- 0,003 12-21-11 252 0.049 +/- 0,005 06-30-11 286 0.016 +/- 0.003 12-29-11 341 0.029 +/- 0.003 2nd Quarter Mean +/- s.d. 0.021 +/- 0.007 4th Quarter Mean +/- s.d. 0.033 +/- 0.009 Cumulative Average 0.029 Previous Annual Average 0.028 3

a Iodine-1 31 concentrations are < 0.03 pCi/mi unless noted otherwise.

Air iodine activity detected; noted in Appendix A.

c Low volume due to power outage from storms.

6-1

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

Location: D-15 (On-site, north) 3 Units: pCi/mr Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (me) Gross Beta Collected (mo) Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 319 0.050 +/- 0.004 07-07-11 274 0.028 +/- 0.004 01-13-11 272 0.030 +/- 0.004 07-14-11 277 0.030 +/- 0.004 01-20-11 273 0.049 +/- 0.005 07-21-11 275 0.040 +/- 0.004 01-27-11 273 0.049 +/- 0.005 07-28-11 271 0.025 +/- 0.003 02-03-11 276 0.036 +/- 0.004 08-04-11 271 0.036 +/- 0.004 02-10-11 274 0.040 +/- 0.004 08-12-11 316 0.024 +/- 0.003 02-17-11 272 0.030 +/- 0.004 08-18-11 233 0.032 +/- 0.004 02-24-11 275 0.024 +/- 0.003 08-25-11 292 0.025 +/- 0.003 03-03-11 297 0.030 +/- 0.004 09-01-11 288 0.026 +/- 0.003 03-10-11 297 0.022 +/- 0.003 09-08-11 289 0.029 +/- 0.004 03-17-11 297 0.030 +/- 0.003 09-16-11 327 0.023 +/- 0.003 b

03-24-11 294 0.033 +/- 0.004 09-22-11 246 0.024 +/- 0.004 b

03-31-11 297 0.054 +/- 0.004 09-29-11 289 0.018 +/- 0.003 1st Quarter Mean +/- s.d, 0.037 +/- 0.011 3rd Quarter Mean +/- s.d. 0.028 t 0.006 b

04-07-11 297 0.030 +/- 0.004 10-06-11 288 0.021 +/- 0.003 04-14-11 297 0.026 +/- 0.003 10-13-11 289 0.029 +/- 0.004 04-21-11 296 0.021 +/- 0.003 10-20-11 293 0.014 +/- 0.003 04-28-11 299 0.012 +/- 0.003 10-27-11 286 0.030 +/- 0.004 11-03-11 294 0.026 +/- 0.003 05-05-11 298 0.014 +/- 0.003 05-12-11 292 0.018 +/- 0.003 11-10-11 283 0.031 +/- 0.004 05-18-11 256 0.013 +/- 0.003 11-17-11 286 0.031 +/- 0.004 05-26-11 341 0.016 +/- 0.003 11-23-11 238 0.024 +/- 0.004 06-02-11 275 0.020 +/- 0.003 12-01-11 314 0.035 +/- 0.004 06-09-11 275 0,031 +/- 0.004 12-08-11 278 0.039 +/- 0.004 06-16-11 272 0.016 +/- 0.003 12-15-11 280 0.042 +/- 0.004 06-23-11 273 0.018 +/- 0.003 12-21-11 235 0.051 +/- 0.005 06-30-11 274 0.014 +/- 0.003 12-29-11 318 0.025 +/- 0.003 2nd Quarter Mean +/- s.d. 0.019 +/- 0.006 4th Quarter Mean +/- s.d. 0.031 +/- 0.010 Cumulative Average 0.028 Previous Annual Average 0.028 Iodine-131 concentrations are < 0.03 pCi/m 3 unless noted otherwise.

hAir iodine activity detected; noted in Appendix A.

' Corrected volume.

7-1

DUANE ARNOLD Table 8. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location: D-163 (On-site)

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

Date Volume Date Volume Collected (in) Gross Beta Collected (mi) Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 332 0.045 +/- 0.004 07-07-11 303 0.052 +/- 0.004 01-13-11 223 0.041 +/- 0.005 07-14-11 304 0.029 +/- 0.003 01-20-11 223 0.064 +/- 0.006 07-21-11 296 0.038 +/- 0.004 01-27-11 211 0.065 +/- 0.006 07-28-11 293 0.026 +/- 0.003 02-03-11 218 0.036 +/- 0.005 08-04-11 302 0.037 +/- 0.004 02-10-11 219 0.041 +/- 0.005 08-12-11 335 0.025 +/- 0.003 02-17-11 298 0.031 +/- 0.004 08-18-11 248 0.032 +/- 0.004 02-24-11 300 0.020 +/- 0.003 08-25-11 295 0.026 +/- 0.003 03-03-11 300 0.035 +/- 0.004 09-01-11 291 0.029 +/- 0.004 03-10-11 300 0.027 +/- 0.003 09-08-11 291 0.025 +/- 0.003 03-17-11 300 0.031 +/- 0.003 09-16-11 331 0.026 +/- 0.003 b

03-24-11 297 0.037 +/- 0.004 09-22-11 249 0.021 +/- 0.004 b

03-31-11 300 0.051 +/- 0.004 09-29-11 285 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.040 +/- 0.013 3rd Quarter Mean +/- s.d. 0.030 +/- 0.008 b

04-07-11 300 0.031 +/- 0.004 10-06-11 290 0.021 +/- 0.004 04-14-11 300 0.024 +/- 0.003 10-13-11 292 0.035 +/- 0.004 04-21-11 298 0.019 +/- 0.003 10-20-11 297 0.016 +/- 0.003 04-28-11 302 0.011 +/- 0.003 10-27-11 287 0.032 +/- 0.004 11-03-11 298 0.030 +/- 0.004 05-06-11 341 0.018 +/- 0.003 05-12-11 256 0,022 +/- 0.004 11-10-11 289 0.037 +/- 0.004 05-18-11 260 0.014 +/- 0.003 11-17-11 293 0.037 +/- 0.004 05-26-11 348 0.014 +/- 0.003 11-23-11 253 0.030 +/- 0.004 06-02-11 304 0.021 +/- 0.003 12-01-11 333 0.038 +/- 0.004 06-09-11 303 0.033 +/- 0.004 12-08-11 296 0.039 +/- 0,004 06-16-11 300 0.014 +/- 0.003 12-15-11 297 0.045 +/- 0,004 06-23-11 301 0.017 +/- 0.003 12-21-11 249 0.060 +/- 0.005 06-30-11 303 0.018 +/- 0.003 12-29-11 338 0.032 +/- 0.003 2nd Quarter Mean +/- s.d. 0.020 +/- 0.006 4th Quarter Mean +/- s.d. 0.035 +/- 0.011 Cumulative Average 0.031 Previous Annual Average 0.028 a lodine-131 concentrations are < 0.03 pCi/mi3 unless noted otherwise.

bAir iodine activity detected; noted in Appendix A.

8-1

DUANE ARNOLD Table 9. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131a.

Location: D-40 Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (ma) Gross Beta Collected (m") Gross Beta Required LLD 0.010 Required LLD 0.010 01-06-11 323 0.052 +/- 0.004 07-07-11 NDO 01-13-11 273 0.036 +/- 0.004 07-14-11 269 0.024 +/- 0.003 01-20-11 275 0.049 +/- 0.005 07-21-11 305 0.038 +/- 0.004 01-27-11 276 0.056 +/- 0.005 07-28-11 303 0.023 +/- 0.003 02-03-11 280 0.028 +/- 0.004 08-04-11 302 0.028 +/- 0.003 02-10-11 275 0.037 +/- 0.004 08-12-11 354 0.027 +/- 0.003 02-17-11 275 0.033 +/- 0.004 08-18-11 259 0.032 +/- 0.004 02-24-11 276 0.026 +/- 0.004 08-25-11 302 0.033 +/- 0.004 03-03-11 277 0.034 +/- 0.004 09-01-11 311 0.026 +/- 0.003 03-10-11 308 0.027 +/- 0.003 09-08-11 304 0.022 +/- 0.003 03-17-11 305 0.028 +/- 0.003 09-16-11 349 0.022 +/- 0.003 03-24-11 303 0.041 +/- 0.004 09-22-11 260 0.022 +/- 0.004 03-31-11 312 0.055 +/- 0.004 c 09-29-11 303 0.018 +/- 0.003 1st Quarter Mean +/- s.d. 0.039 +/- 0.011 3rd Quarter Mean +/- s.d. 0.026 +/- 0.005 04-07-11 299 0.030 +/- 0.004 c 10-06-11 306 0.023 +/- 0.004 04-14-11 307 0.022 +/- 0.003 10-13-11 284 0.042 +/- 0.004 04-21-11 301 0.018 +/- 0.003 10-20-11 280 0.020 +/- 0.003 04-28-11 311 0.009 +/- 0.002 10-27-11 287 0.033 +/- 0.004 11-03-11 282 0.032 +/- 0.004 05-05-11 305 0.016 +/- 0.003 05-12-11 303 0.019 +/- 0.003 11-10-11 281 0.034 +/- 0.004 05-18-11 264 0.012 +/- 0.003 11-17-11 286 0.033 +/- 0.004 05-26-11 352 0.014 +/- 0.003 11-23-11 242 0.027 +/- 0.004 06-02-11 300 0.019 +/- 0.003 12-01-11 320 0.037 +/- 0.004 06-10-11 292 0.019 +/- 0.003 12-08-11 285 0.044 +/- 0,004 06-16-11 239 0.014 +/- 0.003 12-15-11 284 0.053 +/- 0.005 06-23-11 304 0.011 +/- 0.003 d 12-21-11 241 0.056 +/- 0.005 06-30-11 303 0.012 +/- 0.003 12-29-11 325 0.037 +/- 0.004 2nd Quarter Mean +/- s.d. 0.017 +/- 0.006 4th Quarter Mean +/- s.d. 0.036 +/- 0.011 Cumulative Average 0.030 Previous Annual Average 0.027 8 Iodine-131 concentrations are < 0.03 pCi/m 3 unless noted otherwise.

b Corrected volume.

cAir iodine activity detected; noted in Appendix A.

0 Data may be impacted by voltage problems at location due to possible lightning strike week of June 19.

e ND = No data; see Table 2.0, Listing of Missed Samples.

9-1

DAEC Table 10. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m' Location D-3 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP- 2253 DAP- 4875 DAP- 7054 DAP- 9185 Volume (mi) 3593 3545 3448 3765 Be-7 0.071 + 0.020 0.088 +/- 0.013 0,077 + 0.020 0.071 +/- 0.015 Mn-54 0.0010 0.0003 0.0007 < 0.0005 Fe-59 0.0016 0.0011 0.0018 < 0.0007 Co-58 0.0007 0.0006 0.0009 < 0.0007 Co-60 0.0006 0.0005 0.0009 < 0.0005 Zn-65 0.0008 0.0012 0.0015 < 0.0006 Nb-95 0.0016 0.0010 0.0017 < 0.0008 Zr-95 0.0017 0.0009 0.0023 < 0.0018 Ru-1 03 0.0009 0.0012 0.0007 < 0.0010 Ru-106 0.0071 0.0058 0.0071 < 0.0055 Cs-134 0.0006 0.0008 0.0014 < 0.0007 Cs-137 0.0005 0.0006 0.0011 < 0.0005 Ce-141 0.0024 0.0014 0.0018 < 0.0011 Ce-144 0.0046 0.0038 0.0054 < 0,0028 Location D-5 Lab Code DAP- 2254 DAP- 4876 DAP- 7055 DAP- 9186 Volume (mi) 3740 3664 3745 3711 Be-7 0.064 +/- 0.016 0.072 +/- 0.013 0.078 +/- 0.014 0.040 +/- 0.011 Mn-54 0.0010 0.0005 < 0.0008 < 0.0006 Fe-59 0.0015 0.0014 < 0.0008 < 0.0014 Co-58 0.0007 0.0006 < 0.0005 < 0.0007 Co-60 0.0007 0.0005 < 0.0007 < 0.0005 Zn-65 0.0011 0.0005 < 0.0014 < 0.0013 Nb-95 0.0010 0.0009 < 0.0010 < 0.0010 Zr-95 0.0016 0.0009 < 0.0017 < 0.0011 Ru-103 0.0009 0.0007 < 0.0013 < 0.0006 Ru-106 0.0054 0.0053 < 0.0067 < 0.0054 Cs-134 0.0006 0.0005 < 0.0010 < 0.0006 Cs-137 0.0008 0.0006 < 0.0007 < 0.0005 Ce-141 0.0013 0.0013 < 0.0018 < 0.0009 Ce-144 0.0050 0.0039 < 0.0053 < 0.0028 Location D-6 Lab Code DAP- 2255 DAP- 4877 DAP- 7056 DAP- 9187 Volume (m") 3844 3374 3699 3679 Be-7 0.068 +/- 0.018 0.087 + 0.020 0.083 +/- 0.017 0.052 +/- 0.012 Mn-54 0.0008 0.0009 < 0.0008 < 0.0008 Fe-59 0.0015 0.0019 < 0.0022 < 0.0030 Co-58 0.0006 0.0006 < 0.0007 < 0.0007 Co-60 0.0006 0.0008 < 0.0010 < 0.0009 Zn-65 0.0007 0.0009 < 0.0018 < 0.0014 Nb-95 0.0008 0.0011 < 0.0009 < 0.0013 Zr-95 0.0015 0.0008 < 0.0011 < 0.0014 Ru-103 0.0009 0.0014 < 0.0013 < 0.0014 Ru-106 0.0064 0.0053 < 0.0065 < 0.0059 Cs-134 0.0004 0.0008 < 0.0007 < 0.0011 Cs-137 0.0005 0.0007 < 0.0007 < 0.0009 Ce-141 0.0018 0.0020 < 0.0014 < 0.0018 Ce-144 0.0034 0.0040 < 0.0047 < 0.0056 10-1

DAEC Table 10. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m" Location D-7 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP- 2256 DAP- 4878 DAP- 7058 DAP- 9188 Volume (m*) 3556 3869 3897 3851 Be-7 0.081 + 0.020 0.071 + 0.014 0.062 + 0.013 0.058 +/- 0.014 Mn-54 0.0010 0.0009 0.0007 < 0.0009 Fe-59 0.0016 0.0017 0.0016 < 0.0016 Co-58 0.0007 0.0007 0.0005 < 0.0007 Co-60 0.0006 0.0007 0.0007 < 0.0009 Zn-65 0.0010 0.0006 0.0022 < 0.0007 Nb-95 0.0011 0.0015 0.0007 < 0.0009 Zr-95 0.0018 0.0021 0.0017 < 0.0017 Ru-103 0.0012 0.0006 0.0009 < 0.0007 Ru-106 0.0056 0.0057 0.0083 < 0.0076 Cs-134 0.0008 0.0007 0.0008 < 0.0006 Cs-137 0.0006 0.0009 0.0005 < 0.0005 Ce-141 0.0011 0.0019 0.0010 < 0.0009 Ce-1 44 0.0038 0.0051 0.0041 < 0.0029 Location D-11 Lab Code DAP- 2257 DAP- 4879 DAP- 7059 DAP- 9189 Volume (m") 3708 3514 3806 3650 Be-7 0.070 +/- 0.018 0.104 +/- 0.016 0.070 +/- 0.014 0.057 +/- 0.011 Mn-54 0.0007 < 0.0008 < 0.0009 < 0.0010 Fe-59 0.0026 < 0.0022 < 0.0023 < 0.0012 Co-58 0.0010 < 0.0006 < 0.0011 < 0.0009 Co-60 0.0007 < 0.0006 < 0.0008 < 0.0006 Zn-65 0.0010 < 0.0008 < 0.0012 < 0.0014 Nb-95 0.0018 < 0.0010 < 0.0013 < 0.0009 Zr-95 0.0016 < 0.0009 < 0.0015 < 0.0010 Ru-103 0.0008 < 0.0007 < 0.0010 < 0.0010 Ru-i 06 0.0059 < 0.0048 < 0.0073 < 0.0070 Cs-134 0.0009 < 0.0008 < 0.0008 < 0.0005 Cs-I 37 0.0010 < 0.0008 < 0.0008 < 0.0008 Ce-141 0.0027 < 0.0012 < 0.0017 < 0.0012 Ce-1 44 0.0052 < 0.0038 < 0.0046 < 0.0040 Location D-13 Lab Code DAP- 2258 DAP- 4880 DAP- 7060 DAP- 9190 Volume (mi3 ) 3550 3651 3721 3787 Be-7 0.074 +/- 0.016 0.089 +/- 0.015 0.075 +/- 0.013 0.049 +/- 0.009 Mn-54 0.0009 < 0.0005 < 0.0005 < 0.0005 Fe-59 0.0018 < 0.0009 < 0.0011 < 0.0011 Co-58 0.0006 < 0.0008 < 0.0009 < 0.0006 Co-60 0.0008 < 0.0008 < 0.0008 < 0.0004 Zn-65 0.0008 < 0.0014 < 0.0007 < 0.0014 Nb-95 0.0014 < 0.0018 < 0,0008 < 0.0009 Zr-95 0.0013 < 0.0014 < 0.0012 < 0.0007 Ru-1 03 0.0014 < 0.0012 < 0.0006 < 0.0007 Ru-106 0.0069 < 0.0063 < 0.0050 < 0.0056 Cs-134 0.0008 < 0.0007 < 0.0005 < 0.0005 Cs-137 0.0005 < 0.0008 < 0.0004 < 0.0007 Ce-141 0.0021 < 0.0012 < 0.0011 < 0.0009 Ce-144 0.0031 < 0.0056 < 0.0035 < 0.0033 10-2

DAEC Table 10. Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m' Location D-15 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP- 2259 DAP- 4881 DAP- 7061 DAP- 9191 Volume (m') 3714 3745 3647 3681 Be-7 0.071 + 0.017 0.069 +/- 0.018 0.073 +/- 0.012 0.047 +/- 0.011 Mn-54 0.0005 0.0007 < 0,0004 < 0.0010 Fe-59 0.0019 0.0016 < 0.0013 < 0.0018 Co-58 0.0006 0.0004 < 0.0007 < 0.0007 Co-60 0.0007 0.0006 < 0.0003 < 0.0006 Zn-65 0.0013 0.0011 < 0.0007 < 0.0008 Nb-95 0.0019 0.0012 < 0.0008 < 0.0006 Zr-95 0.0019 0.0007 < 0.0015 < 0.0016 Ru-103 0.0009 0.0010 < 0.0007 < 0.0016 Ru-i 06 0.0067 0.0033 < 0.0031 < 0.0096 Cs-1 34 0.0010 0.0005 < 0.0007 < 0.0007 Cs-137 0.0011 0.0010 < 0.0006 < 0.0008 Ce-141 0.0018 0.0016 < 0.0010 < 0.0017 Ce-144 0.0055 0.0050 < 0.0025 < 0,0046 Location D-16 Lab Code DAP- 2260 DAP- 4882 DAP- 7062 DAP- 9192 Volume (m') 3520 3917 3823 3813 Be-7 0.075 +/- 0.016 0.072 +/- 0.014 0.061 +/- 0.017 0.058 +/- 0.016 Mn-54 0.0010 0.0005 < 0.0006 < 0.0005 Fe-59 0.0024 0.0012 < 0.0008 < 0.0014 Co-58 0.0012 0.0005 < 0.0006 < 0.0010 Co-60 0.0006 0.0003 < 0.0007 < 0.0010 Zn-65 0.0008 0.0008 < 0.0015 < 0.0011 Nb-95 0.0009 0.0012 < 0.0011 < 0.0016 Zr-95 0.0019 0.0018 < 0.0018 < 0.0009 Ru-103 0.0009 0.0008 < 0.0010 < 0.0007 Ru-106 0.0065 0.0052 < 0.0043 < 0.0087 Cs-134 0.0007 0.0008 < 0.0008 < 0.0005 Cs-137 0.0008 0.0009 < 0.0008 < 0.0006 Ce-141 0.0020 0.0016 < 0.0018 < 0.0014 Ce-144 0.0052 0.0038 < 0.0051 < 0.0031 Location D-40 Lab Code DAP- 2261 DAP- 4883 DAP- 7063 DAP- 9193 Volume (m") 3759 3882 3621 3703 Be-7 0.067 +/- 0.016 0,070 + 0.016 0.070 +/- 0.015 0.094 +/- 0.020 Mn-54 0.0008 0.0010 < 0.0007 < 0.0008 Fe-59 0.0015 0.0015 < 0.0010 < 0.0026 Co-58 0.0006 0.0006 < 0.0007 < 0.0008 Co-60 0.0007 0.0012 < 0.0009 < 0.0008 Zn-65 0.0007 0.0010 < 0.0011 < 0.0011 Nb-95 0.0009 0.0011 < 0.0008 < 0.0020 Zr-95 0.0015 0.0011 < 0.0012 < 0.0022 Ru-103 0.0008 0.0015 < 0.0007 < 0.0015 Ru-106 0.0042 0.0094 < 0.0060 < 0.0067 Cs-134 0.0009 0.0008 < 0.0007 < 0.0007 Cs-137 0.0008 0.0012 < 0.0007 < 0.0009 Ce-141 0.0016 0.0017 < 0.0015 < 0.0036 Ce-144 0.0042 0.0054 < 0.0031 < 0.0046 10-3

DUANE ARNOLD Table 11. Ambient gamma radiation as measured by thermoluminescent dosimeters (TLD).

Quarterly collection. Units: mRI91 days Control Locations 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

D-1 15.1 +/- 0.9 13.7 +/- 1.7 16.1 +/- 0.6 14.3 +/- 1.3 D-2 15.4 +/- 0.9 14.3 +/- 1.9 15.7 +/- 0.8 13.0 +/- 0.7 D-3 14.8 +/- 0.8 14.8 +/- 0.9 15.6 +/- 1.0 16.0 +/- 0.6 D-5 16.6 +/- 0.8 19.1 +/- 0.8 18.4 +/- 1.3 19.5 +/- 0.5 D-6 14.9 +/- 0.9 17.0 +/- 0.9 16.0 +/- 0.7 17.8 +/- 0.7 D-7 15.2 +/- 0.8 17.7 +/- 1.1 16.4 +/- 0.9 17.7 +/- 0.7 D-8 17.8 +/- 0.8 22.0 +/- 1.3 20.1 +/- 0.8 21.4 +/- 1.0 D-10 17.0 +/- 0.6 16.1 +/- 1.0 19.0 +/- 0.9 16.0 +/- 0.8 D-11 14.0 +/- 0.5 16.0 +/- 1.5 15.1 +/- 0.7 16.8 +/- 1.3 D-13 13.9 +/- 0.6 16.6 +/- 1.0 16.4 +/- 0.7 16.9 +/- 1.0 Mean +/- s.d. 15.5 +/- 1.3 16.7 +/- 2.5 16.9 +/- 1.7 16.9 +/-2.4 Within 0.5 mi. of Stack D-15 15.7 +/- 1.0 16.5 +/- 1.0 16.8 +/- 1.2 16.6 +/-0.6 D-16 16.4 +/- 0.7 18.2 +/- 1.6 17.4 +/- 1.0 17.2 +/-2.0 D-17 17.8 +/- 0.8 16.2 +/- 1.4 20.5 +/- 1.2 19.2 +/- 1.1 D-18 16.0 +/- 1.2 14.9 +/-21.1 16.5 +/- 1.1 15.2 +/-0.6 D-19 15.0 +/- 0.8 14.1 +/- 1.1 15.3 +/- 1.1 14.7 +/- 0.8 D-20 16.6 +/-0.6 18.9 +/- 1.2 17.5 +/- 0.7. 18.7 +/- 0.9 D-21 17.3 +/-0.8 17.0 +/- 1.0 19.2 +/- 1.2 17.4 +/- 0.8 D-22 16.9 +/- 0.8 18.2 +/- 1.0 17.7 +/- 0.9 17.7 +/- 0.7 D-23 15.4 +/- 0.8 16.8 +/- 1.4 16.3 +/- 1.0 16.5 +/- 0.7 D-28 18.7 +/- 1.1 22.6 +/- 1.3 20.4 +/- 1.2 21.8 +/- 0.8 D-29 19.7 +/- 0.6 23.7 +/- 1.2 22.3 +/- 1.0 22.1 +/- 1.0 D-30 19.1 +/- 0.6 22.3 +/- 2.0 21.3 +/- 0.8 21.2 +/- 1.0 D-31 18.9 +/- 0.9 23.0 +/- 1.6 20.9 +/- 1.4 21.9 +/- 1.1 D-32 20.7 +/- 0.7 21.7 +/- 1.2 22.3 +/- 0.8 21.0 +/- 1.0 Mean +/- s.d. 17.4 +/- 1.8 18.9 +/- 3.2 18.9 +/- 2.4 18.7 +/- 2.5 11-1

DUANE ARNOLD Table 11. Ambient gamma radiation as measured by thermoluminescent dosimeters (TLD).

Quarterly collection. Units: mR/91 days Within 1.0 mi. of 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Stack D-43 14.4 +/- 0.7 17.7 + 1.7 16.7 +/- 0.8 17.7 +/- 1.1 D-44 18.1 +/- 0.6 21.7 +/- 1.0 20.1 +/- 0.8 21.0 +/- 0.6 D-45 15.4 +/- 0.6 17.3 +/- 1.5 16.8 +/- 0.6 16.3 +/- 1.0 D-46 18.2 +/- 0.8 22.4 +/- 1.6 20.6 +/- 0.8 20.6 +/- 0.9 D-47 18.2 +/- 0.7 20.8 +/- 1.3 20.2 +/- 0.8 19.6 +/- 0.9 D-48 18.8 +/- 0.7 22.2 + 1.4 NDa 20.6 +/- 0.4 D-82 14.2 +/- 0.6 14.1 +/-1.3 17.2 +/- 0.8 14.4 +/- 0.8 D-83 15.4 +/- 0.6 17.1 +/-1.2 17.6 +/- 1.0 16.6 +/- 0.5 D-84 15.8 +/- 0.8 17.2 +/- 1.2 17.7 +/-0.8 16.3 +/- 0.8 D-85 15.7 +/-0.6 18.8 +/- 1.3 18.9 +/- 0.7 18.0 +/- 0.9 D-86 18.0 +/- 1.2 18.8 +/- 1.5 19.4 +/- 1.2 18.0 +/- 1.0 D-91 16.5 +/- 0.8 19.1 +/- 1.3 18.3 +/- 1.1 18.1 +/- 0.9 Mean +/- s.d. 16.6 +/- 1.6 18.9 +/- 2.5 18.5 +/- 1.4 18.1 +/- 2.0 Within 3.0 mi. of Stack D-33 14.2 +/- 0.6 16.2 +/- 0.8 15.7 +/- 0.6 15.3 +/- 0.6 D-34 14.0 +/- 0.7 15.3 +/- 1.3 15.5 +/- 0.8 14.8 +/- 1.0 D-35 14.4 +/- 0.5 15.3 +/- 1.0 15.4 +/- 0.7 14.7 +/- 0.6 D-36 15.5 +/- 0.8 16.3 +/- 1.3 17.3 +/- 0.8 16.4 +/- 1.0 D-37 17.8 +/- 0.9 ND9 18.4 +/- 1.2 14.8 +/- 0.6 D-38 15.6 +/- 0.8 18.2 +/- 1.5 17.5 +/-0.9 17.4 +/- 0.9 D-39 16.2 +/- 0.6 17.8 +/- 1.2 17.8 +/-0.7 17.8 +/- 0.7 D-40 14.2 +/- 0.7 16.7 +/- 1.1 15.5 +/-0.7 16.8 +/- 0.8 D-41 15.6 +/- 0.7 16.6 +/- 1.3 16.5 +/- 0.8 17.0 +/- 0.9 D-42 15.2 +/- 0.7 17.1 +/- 1.7 15.7 +/-0.7 17.1 +/- 1.1 Mean + s.d. 15.3 +/- 1.2 16.6 +/- 1.0 16.5 _ 1.1 16.2 +/- 1.2 ISFSI Fenceline D-161 15.0 +/- 1.8 15.9 +/- 0.7 14.6 +/- 1.5 D-162 16.7 +/- 1.3 17.2 +/- 1.0 15.8 +/- 1.1 D-163 14.9 +/- 1.1 b 13.6 +/- 0.7 15.1 +/- 0.9 D-164 13.4 +/- 1.0 15.3 +/- 0.7 12.6 +/- 0.6 Mean +/- s.d. 15.0 +/- 1.4 15.5 +/- 1.5 14.5 +/- 1.4 a ND = No data; see Table 2.0, Listing of Missed Samples. The TLD was exposed for two quarters, the fourth quarter value is prorated for 91 days.

bAdded 2nd quarter.

11-2

DUANE ARNOLD Table 12. Milk samples, analyses for iodine-131 and gamma emitting isotopes.

Collection: Monthly during non-grazing season (October 1 through April 30): biweekly during grazing season (May 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 01-04-11 DMI- 44 < 0.3 1440 +/- 111 < 2.7 < 4.3 < 7.0 < 1.3 02-08-11 DMI- 541 <0.3 1567 +/- 110 <3.0 <4.1 < 13.0 <2.4 03-08-11 DMI- 993 <0.4 1591 +/- 121 <3.8 <4.1 <13.2 <1.3 03-25-11 DMI- 1357 <0.4 1396 +/- 117 <4.4 <3.0 <21.4 <2.5 04-01-11 DMI- 1577 <0.2 1464 +/- 111 <2.9 <3.0 <15.0 <1.2 04-05-11 DMI- 1663 <0.3 1507 +/- 122 <2.9 <2.3 < 18.8 <2.4 04-19-11 DMI- 2225 <0.4 1372 +/- 108 <2.4 <3.6 < 12.8 < 1.3 05-03-11 DMI- 2666 <0.3 1284 +/- 108 <3.0 <3.3 < 10.0 <2.1 05-17-11 DMI- 3078 < 0.3 1374 +/- 104 < 2.2 < 3.5 < 8.2 < 2.3 06-01-11 DMI- 3384 < 0.3 1468 +/- 114 < 2.9 < 2.9 < 18.1 < 3.2 06-14-11 DMI- 3782 <0.3 1517 +/- 115 <3.7 <3.9 < 13.3 < 1.7 06-28-11 DMI- 4033 <0.2 1370 +/- 107 <3.4 <3.9 <6.9 <3.0 07-12-11 DMI- 4421 < 0.3 1315 +/- 108 < 2.6 < 3.3 < 9.6 < 2.1 07-26-11 DMI- 4990 < 0.3 1453 +/- 114 < 3.9 < 3.9 < 16.9 < 1.2 08-09-11 DMI- 5372 <0.2 1419 +/- 117 <2.9 <4.1 < 15.0 < 1.7 08-23-11 DMI- 5746 <0.4 1289 +/- 114 <3.7 <3.4 < 13.6 <3.1 09-07-11 DMI- 6055 < 0.3 1515 +/- 109 < 2.7 < 3.8 < 13.3 < 1.7 09-20-11 DMI- 6393 < 0.2 1453 +/- 114 < 2.5 < 3.5 < 8.7 < 2.4 10-04-11 DMI- 6675 < 0.3 1298 +/- 95 < 2.9 < 3.2 < 10.2 < 1.3 11-08-11 DMI- 7897 <0.4 1432 +/- 102 <2.8 <3.2 < 15.8 <2.2 12-13-11 DMI- 8660 < 0.2 1471 +/- 109 < 3.7 < 2.9 < 12.8 < 2.3 Location D-1 10 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-04-11 DMI- 45 <0.4 1309 +/- 118 <3.4 <3.9 <8.4 <2.3 02-08-11 DMI- 542 < 0.3 1426 +/- 100 < 3.0 < 3.6 < 7.2 < 1.9 03-08-11 DMI- 994 < 0.3 1398 +/- 120 < 3.7 < 4.1 < 15.6 < 1.8 03-25-11 DMI- 1358 < 0.5 1381 +/- 118 < 3.3 < 4.0 < 17.3 < 2.3 04-01-11 DMI- 1578 <0.3 1311 +/- 117 <3.4 <4.4 <11.8 <2.7 04-05-11 DMI- 1664 < 0.3 1390 +/- 119 < 3.5 < 2.4 < 14.7 < 1.4 04-19-11 DMI- 2226 < 0.2 1394 +/- 109 < 2.9 < 4.4 < 12.8 < 3.2 05-03-11 DMI- 2667 <0.4 1328 +/- 105 <2.8 <3.6 < 13.1 <2.1 05-17-11 DMI- 3079 <0.3 1386 +/- 125 <3.6 <4.1 < 16.9 <2.6 06-01-11 DMI- 3385 <0.3 1307 +/- 120 <3.6 <3.4 < 17.8 <2.1 06-14-11 DMI- 3783 < 0.3 1360 +/- 109 < 3.4 < 2.8 < 11.0 < 3.1 06-28-11 DMI- 4034 < 0.2 1360 +/- 111 < 2.5 < 4.3 < 7.8 < 1.8 07-12-11 DMI- 4422 < 0.4 1389 +/- 111 < 3.3 < 4.3 < 9.8 < 1.3 07-26-11 DMI- 4991 <0.3 1399 +/- 107 <2.7 <3.0 < 13.9 <2.0 08-10-11 DMI- 5505 <0.3 1343 +/- 99 <2.5 <3.4 < 14.8 <4.5 08-23-11 DMI- 5747 <0.2 1351 +/- 111 <2.7 <3.5 <9.5 <3.5 09-07-11 DMI- 6056 <0.3 1386 +/- 109 <3.0 <4.0 < 10.0 <2.3 09-20-11 DMI- 6394 <0.3 1319 +/- 101 <2.2 <3.6 < 12.2 <2.4 10-04-11 DMI- 6676 <0.2 1415 +/- 119 <3.0 <3.3 <9.3 <1.3 11-08-11 DMI- 7898 <0.4 1346 +/- 103 <2.9 <3.4 <15.5 <1.5 12-13-11 DMI- 8661 <0.2 1339 +/- 101 <2.6 <3.6 <13.7 <1.8 12-1

DUANE ARNOLD Table 13.1. Well water samples, analyses for gross beta and tritium.

Collection: Quarterly Units: pCi/L Location D-53 Treated Municipal Water Collection Date 03-16-11 06-08-11 09-02-11 11-15-11 Lab Code DWW- 1156 DWW- 3647 DWW- 5965 DWW- 8069 Gross Beta 1.8 +/- 0.8 1.5 +/- 0.8 1.1 +/- 0.4 1.3 +/- 0.6 H-3 < 151 < 142 < 144 < 142 Location D-54 Inlet to Municipal Water Collection Date 03-16-11 06-08-11 09-02-11 11-15-11 Lab Code DWW- 1158 DWW- 3648 DWW- 5966 DWW- 8070 Gross Beta 1.4 +/- 0.8 < 1.2 1.2 +/- 0.4 1.4 +/- 0.6 H-3 < 151 < 142 < 144 < 142 Location D-55 On-site Well Collection Date 03-16-11 06-08-11 09-02-11 11-15-11 Lab Code DWW- 1159 DWW- 3649 DWW- 5967 DWW- 8071 Gross Beta < 1.2 < 1.3 < 0.7 < 0.9 H-3 < 151 < 142 < 144 < 142 Location D-57 Bull Farm Collection Date 03-16-11 06-08-11 09-02-11 11-15-11 Lab Code DWW- 1160 DWW- 3650 DWW- 5968 DWW- 8072 Gross Beta < 1.2 < 1.2 0.8 +/- 0.4 < 0.8 H-3 < 151 < 142 < 144 < 142 Location D-58 Franz Farm Collection Date 03-16-11 06-08-11 09-02-11 11-15-11 Lab Code DWW- 1161 DWW- 3651 DWW- 5969 DWW- 8073 Gross Beta 3.5 +/- 0.9 4.6 +/- 1.0 3.2 +/- 0.5 3.6 +/- 0.7 H-3 < 151 < 142 < 144 < 142 Location D-72 Van Note Farm Collection Date 03-16-11 06-08-11 09-02-11 11-15-11 Lab Code DWW- 1162 DWW- 3652 DWW- 5970 DWW- 8074 Gross Beta < 1.1 < 1.4 < 0.7 < 0.9 H-3 < 151 < 142 < 144 < 142

' Gamma isotopic analysis will be performed ifgross beta activity is greater than 3 pCi/L and/or H3 activity exceeds MDA.

13-1

DUANE ARNOLD Table 13.2. Ground water, Monitoring wells, analyses for gross beta and tritium a.b Collection: Quarterly Lab Code Date H-3 (pCi/L) Gross Beta Lab Code Date H-3 (pCi/L) Gross Beta D-111A D-111B DWW- 803 02/23/11 274 +/- 99 -

DWW- 1365 03/24/11 195 +/- 114 2.2 +/- 0.8 DWW- 1366 03/24/11 < 174 1.9 +/- 0.8 DWW- 3588 06/03/11 195 +/- 93 - DWW- 3589 06/03/11 < 139 -

DWW- 4094 06/24/11 187 +/- 83 DWW- 5675 08/19/11 < 151 DWW- 5676 08/19/11 < 144 DWW- 8266 11/19/11 977 +/- 125 C - DWW- 8267 11/19/11 < 167 -

D-112A D-112B DWW- 1367 03/24/11 < 174 2.4 +/- 0.9 DWW- 1368 03/24/11 < 174 1.2 + 0.7 DWW- 3590 06/03/11 < 139 - DWW- 3591 06/03/11 < 139 -

DWW- 5677 08/19/11 < 144 DWW- 5678 08/22/11 < 144 DWW-8268 11/19/11 <167 - DWW-8269 11/19/11 <167 D-1 13A D-113B DWW- 1587 03/28/11 189 +/- 111 2,9 +/- 1.5 DWW- 1588 03/28/11 < 171 < 1.9 DWW- 3592 06/03/11 < 139 - DWW- 3593 06/03/11 < 139 DWW- 4095 06/24/11 < 147 -

DWW-8270 11/19/11 <167 - DWW-8271 11/19/11 <167 D-1 14A D-114B DWW- 804 02/23/11 < 162 -

DWW- 1369 03/24/11 204 +/- 114 1.3 +/-0.8 DWW- 1370 03/24/11 < 174 < 1.3 DWW- 3594 06/03/11 < 139 - DWW- 3595 06/03/11 < 139 DWW- 4096 06/24/11 191 +/- 83 DWW- 5295 07/30/11 < 149 DWW- 5679 08/17/11 < 144 - DWW- 5680 08/17/11 < 144 -

DWW- 8272 11/19/11 < 167 - DWW- 8273 11/19/11 < 137 -

D-115A D-115B DWW- 1590 03/28/11 305 +/- 116 2.7 + 1.3 DWW- 1591 03/28/11 < 171 < 2.1 DWW- 3596 06/03/11 < 139 - DWW- 3597 06/03/11 < 139 -

DWW- 4097 06/24/11 < 147 DWW- 8274 11/19/11 < 137 - DWW- 8275 11/19/11 < 137 -

D-116A D-116B DWW- 1592 03/30/11 182 +/- 111 4.2 +/-0.7 DWW- 1593 03/30/11 175 +/- 111 0.9 +/-0.6 DWW- 3598 06/03/11 < 139 - DWW- 3599 06/03/11 < 139 -

DWW- 4098 06/24/11 < 147 - DWW- 4099 06/24/11 < 147 DWW- 5293 07/29/11 < 149 - DWW- 5294 07/29/11 < 149 DWW- 5681 08/17/11 < 144 - DWW- 5682 08/17/11 < 144 DWW- 8276 11/19/11 < 146 - DWW- 8277 11/19/11 < 146 13-2

DUANE ARNOLD Table 13.2- Ground water, Monitoring wells, analyses for tritium a.

Collection: Quarterly Lab Code Date H-3 (pCi/L) Lab Code Date H-3 (pCi/L)

D-127A D-127B DWW- 5945 08/31/11 < 153 DWW- 5946 08/31/11 < 153 DWW- 8279 11/17/11 420 +/- 93 DWW- 8280 11/17/11 < 137 D-128A D-128B DWW- 5947 09/01/11 2087 +/- 161 DWW- 5948 09/01111 2087 +/- 161 DWW- 6391 09/19/11 1718 +/- 140 DWW- 6392 09/19/11 1773 +/- 142 DWW- 7380 10/21/11 1184 +/- 124 DWW- 7381 10/21/11 1904 +/- 145 DWW- 8281 11/16/11 887 +/- 112 DWW- 9024 11/16/11 1936 +/- 153 DWW- 8988 12/21/11 770 +/- 112 DWW- 9026 12/21/11 1872 +/- 150 D-129A D-129B DWW- 5949 08/30/11 167 +/- 100 DWW- 5950 08/30/11 < 153 DWW- 8282 11/17/11 < 151 DWW- 8283 11/17/11 <137 D-130A D-130B DWW- 5951 08/30/11 < 144 DWW- 5952 08130/11 < 144 DWW- 8284 11/17/11 < 151 DWW- 8285 11/17/11 < 137 D-131A D-131B DWW- 5683 08/19/11 < 151 DWW- 5684 08/19/11 < 144 DWW- 8286 11/19/11 < 151 DWW- 8287 11/19/11 <137 D-132A D-132B DWW- 5685 08/19/11 792 +/- 110 DWW- 5686 08/19/11 < 144 DWW- 8288 11/19/11 1698 +/- 138 DWW- 8289 11/19/11 <151 DWW- 9025 12/21/11 951 +/- 123

' Analyses for Sr-89, Sr-90, Fe-55 and Ni-63 will be performed if tritium activity > 1K pCi/L.

'Gross beta analysis as requested. Not required by technical specifications.

c Tritium repeated with a result of 864 +/-125 pCi/L.

13-3

DUANE ARNOLD Table 14. Vegetation (broadleaf), analyses for iodine-131 and other gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-57 Lab Code DVE- 4035 Date Collected 06-28-11 Sample Type Broadleaf K-40 4.59 +/- 0.42 Mn-54 < 0.011 Fe-59 < 0.036 Co-58 < 0.009 Co-60 < 0.016 Zn-65 < 0.032 Nb-95 < 0.014 Zr-95 < 0.014 Ru-103

• 0.008 Ru-106

• 0.13 1-131

• 0.016 Cs-134 < 0.012 Cs-137 < 0.012 Ce-141 < 0.033 Ce-144 < 0.089 Location D-109 D-108 (C) D-118 Lab Code DVE- 4037 DVE- 4036 DVE- 4038 Date Collected 06-28-11 06-28-11 06-28-11 Sample Type Broadleaf Broadleaf Broadleaf K-40 2.60 +/- 0.39 5.00 +/- 0.54 3.88 +/- 0.27 Mn-54 < 0.020 < 0.024 < 0.006 Fe-59 < 0.042 < 0.028 < 0.023 Co-58 < 0.021 < 0.011 < 0.006 Co-60 < 0.020 < 0.013 < 0.008 Zn-65 < 0.029 < 0.021 < 0.010 Nb-95 < 0.017 < 0.022 < 0.009 Zr-95 < 0.022 < 0.031 < 0.015 Ru-103 < 0.021 < 0.019 < 0.009 Ru-106 < 0.13 < 0.23 < 0.098 1-131 < 0.037 < 0.034 < 0.012 Cs-134 < 0.015 < 0.022 < 0.008 Cs-137 < 0.019 < 0.019 < 0.007 Ce-141 < 0.034 < 0.042 < 0.017 Ce-144 < 0.13 < 0.16 < 0.051 14-1

DUANE ARNOLD Table 15. Vegetation (hay and grain), analyses for gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-16 D-57 D-57 D-57 Lab Code DVE- 4039 DVE- 4040 DVE- 7533 DVE- 7534 Date Collected 06-28-11 06-28-11 10-25-11 10-25-11 Sample Type Grain Forage Beans Corn K-40 3.37 +/- 0.32 3.94 +/- 0.43 13.30 +/- 0.45 2.44 +/- 0.22 Mn-54 < 0.010 < 0.015 < 0.010 < 0.007 Fe-59 < 0.022 < 0.018 < 0.026 < 0.020 Co-58 < 0.009 < 0.013 < 0.008 < 0.010 Co-60 < 0.007 < 0.016 < 0.010 < 0.007 Zn-65 < 0.017 < 0.030 < 0.018 < 0.015 Nb-95 < 0.013 < 0.011 < 0.007 < 0.008 Zr-95 < 0.009 < 0.011 < 0.013 < 0.008 Ru-103 < 0.012 < 0.010 < 0.007 < 0.008 Ru-106 < 0.11 < 0.15 < 0.048 < 0.056 Cs-134 < 0.012 < 0.014 < 0.008 < 0.008 Cs-137 < 0.012 < 0.012 < 0.006 < 0.008 Ce-141 < 0.016 < 0.021 < 0.010 < 0.013 Ce-144 < 0.087 < 0.17 < 0.057 < 0.042 Location D-58 D-72 D-96 D-96 Lab Code DVE- 7537 DVE- 7539 DVE- 7535 DVE- 7536 Date Collected 10-28-11 10-28-11 10-25-11 10-25-11 Sample Type Corn Corn Beans Corn K-40 2.08 +/- 0.23 2.89 +/- 0.25 14.17 +/- 0.50 2.33 +/- 0.22 Mn-54 < 0.009 < 0.008 < 0.013 < 0.005 Fe-59 < 0.019 < 0.009 < 0.016 < 0.012 Co-58 < 0.012 < 0.007 < 0.010 < 0.004 Co-60 < 0.007 < 0.008 < 0.008 < 0.005 Zn-65 < 0.023 < 0.016 < 0.034 < 0.015 Nb-95 < 0.011 < 0.007 < 0.012 < 0.008 Zr-95 < 0.016 < 0.015 < 0.019 < 0.009 Ru-103 < 0.013 < 0.009 < 0.009 < 0.008 Ru-1 06 < 0.068 < 0.082 < 0.091 < 0.063 Cs-134 < 0.005 < 0.007 < 0.009 < 0.006 Cs-137 < 0.011 < 0.006 < 0.013 < 0.009 Ce-141 < 0.019 < 0.010 < 0.021 < 0.013 Ce-144 < 0.072 < 0.056 < 0.054 < 0.047 15-1

DUANE ARNOLD Table 15. Vegetation (hay and grain), analyses for gamma-emitting isotopes.

Collection: Annually Units: poi/g wet Control Location D-108 D-108 D-108 Lab Code DVE- 7899 DVE- 4042 DVE- 7900 Date Collected 11-08-11 06-28-11 11-08-11 Sample Type Corn Forage Soybeans K-40 3.16 +/- 0.22 23.80 +/- 1.32 14.28 +/- 0.47 Mn-54 < 0.006 < 0.021 < 0.008 Fe-59 < 0.013 < 0.061 < 0.027 Co-58 < 0.006 < 0.026 < 0.012 Co-60 < 0.005 < 0.025 < 0.009 Zn-65 < 0.013 < 0.094 < 0:016 Nb-95 < 0.007 < 0.031 < 0.006 Zr-95 < 0.010 < 0.058 < 0.019 Ru-103 < 0.007 < 0.018 < 0.012 Ru-106 < 0.062 < 0.20 < 0.084 Cs-1 34 < 0.005 < 0.025 < 0.009 Cs-137 < 0.008 < 0.031 < 0.014 Ce-141 < 0.015 < 0.056 < 0.014 Ce-144 < 0.041 < 0.23 < 0.070 15-2

DUANE ARNOLD Table 16. Surface water samples, analyses for iodine-131, tritium and gamma-emitting isotopes.

Collection: Monthly Units: pCi/L Location: D-49 Lab Code DSW- 292 DSW- 639 DSW- 1054 DSW- 2132 DSW- 2722 DSW- 3890 Date Collected 01-18-11 02-15-11 03-11-11 04-13-11 05-04-11 06-17-11 H-3 < 163 < 145 < 153 < 141 < 143 < 148 1-131 (Chemistry) < 0.4 < 0.4 < 0.3 < 0.3 < 0.3 < 0.3 Mn-54 < 2.5 < 1.9 < 3.6 <1.7 < 2.6 <2.5 Fe-59 < 3.6 < 4.4 < 5.9 < 3.1 < 4.6 < 3.3 Co-58 < 1.3 < 3.2 < 2.7 < 2.6 < 2.9 < 2.5 Co-60 < 2.5 < 2.6 < 3.1 < 3.2 < 3.4 < 1.8 Zn-65 < 4.8 < 2.7 < 6.2 < 5.0 <6.1 < 4.3 Nb-95 < 2.4 < 2.5 < 2.7 < 2.2 < 3.3 < 3.4 Zr-95 <4.5 < 3.6 < 4.7 < 3,8 < 3.0 < 4.2 1-131 < 3.4 < 5.9 < 4.5 < 5.6 < 4.9 < 3.8 Cs-134 < 1.9 < 2.2 < 2.9 < 2.9 < 2.8 < 2.6 Cs-137 < 2.7 < 3.5 < 4.0 < 3.0 < 2.6 < 3.5 Ba-1 40 < 9.7 < 14.8 < 16.2 < 16.6 < 15.9 < 13.1 La-140 < 1.7 < 5.2 < 2.6 < 3.0 < 3.1 < 3.1 Lab Code DSW- 4341 DSW- 5288 DSW- 6073 DSW- 6805 DSW- 7830 DSW- 8565 Date Collected 07-08-11 08-03-11 09-07-11 10-05-11 11-04-11 12-09-11 H-3 < 139 < 149 < 145 < 145 < 148 < 147 1-131 (Chemistry) < 0.4 < 0.3 < 0.3 < 0.3 < 0.3 < 0.2 Mn-54 < 2.1 < 2.1 < 2.9 < 4.0 < 2.5 < 3.2 Fe-59 < 3.8 < 3.5 < 3.1 < 8.8 < 4.9 < 4.7 Co-58 <1,5 < 2.5 < 2.4 < 4.2 < 1.9 < 2.8 Co-60 < 2.5 < 1.9 < 2.3 < 1.7 < 2.1 < 1.0 Zn-65 < 2.6 < 3.0 < 3.3 < 3.9 < 3.7 < 4.1 Nb-95 < 2.8 < 2.0 < 2.6 < 4.4 < 2.6 < 3.3 Zr-95 <4.3 < 3.7 < 2.8 < 7.7 < 2.6 < 4.9 1-131 < 3.8 < 3.7 < 3.0 < 7.5 < 3.7 < 6.3 Cs-134 < 2.3 < 2.8 < 1.8 < 4.0 < 1.8 < 4.1 Cs-137 < 3.2 < 2.4 < 2.0 < 3.3 < 2.5 < 3.5 Ba-1 40 < 11.5 < 12.6 < 15.6 < 25.8 < 11.6 < 19.5 La-140 < 1.8 < 3.2 < 2.8 < 3.0 < 2.5 < 3.0 16-1

DUANE ARNOLD Table 16. Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.

Collection: Monthly Units: pCi/L Location: D-50 Lab Code DSW- 293 DSW- 640 DSW- 1055 DSW- 2133 DSW- 2723 DSW- 3891 Date Collected 01-19-11 02-15-11 03-11-11 04-13-11 05-04-11 06-17-11 H-3 < 163 < 145 < 153 < 141

• 143 < 148 Mn-54 < 2.6 < 3.1 < 2.7 < 2.3 < 3.4 < 1.6 Fe-59 < 4.7 < 4.4 < 3.7 < 4.7 < 5.0 < 3.9 Co-58

• 2.3 < 1.9 < 2.5 < 2.0 < 3.3 < 2.0 Co-60 < 2.6 < 2.7 < 2.4 < 2.2 < 2.3 < 1.4 Zn-65

• 3.0

• 7.2 < 5.3 < 2.3 < 2.9 <4.1 Nb-95

• 3.2 < 3.3 < 3.7

• 2.0 < 3.2

• 2.2 Zr-95 < 5,5 < 6.3 < 4.4

• 3.1

• 7.6 < 5.3 1-131 < 4.0 < 8.1 < 2.8 < 6.3 < 7.4 < 5.4 Cs-134 < 24 < 2.4 < 2.0 < 2.1 < 4.4 < 2.0 Cs-1 37 < 2.8 < 3.0 < 2.4 < 3.3 < 3.7 < 3.3 Ba-149 < 13.8 < 19.1 < 10.8 < 13.9 < 15.7 < 14.2 La-140 < 3.1 < 4.2 < 1.4 < 1.7 < 5.3 < 1.9 Lab Code DSW- 4342 DSW- 5289 DSW- 6074 DSW- 6806 DSW- 7831 DSW- 8566 Date Collected 07-08-11 08-02-11 09-07-11 10-05-11 11-04-11 12-09-11 H-3 < 139 < 149 < 145 < 145 < 148 < 147 Mn-54 < 3.5 < 2,0 < 2.5 < 2.0 < 3.6 < 3.2 Fe-59 < 4.1 < 6.5 < 4.5 < 3.8 < 3.6 <4.5 Co-58 < 3.2 < 1.3 < 1.7 < 2.2 < 1.4 < 2.5 Co-60 < 1.4 < 2.6 < 2.4 < 2.4 < 3.3 < 0.9 Zn-65 < 5.0 < 4.6 < 2.5 < 5.6 < 7.3 < 2.7 Nb-95 < 3.2 < 3.2 < 3.3 < 3.2 < 3.5 < 3.6 Zr-95 < 3.8 < 5.5 < 5.1 < 2.4 <4.5 < 4.4 1-131 <4.1 < 6.7 < 6.4 < 6.6 < 5.4 < 3.6 Cs-1 34 < 3.4 < 2.8 < 2.4 < 2.4 < 2.5 < 2.8 Cs-1 37 < 3.7 < 1.9 < 2.7 < 3.9 < 2.4 < 3.2 Ba-140 < 18.6 < 17.9 < 11.8 < 13.5 < 13.9 <9.1 La-140 < 3.2 < 2.5 < 2.7 < 3.5 < 1.6 < 1.2 16-2

DUANE ARNOLD Table 16. Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.

Collection: Monthly Units: pCi/L Location: D-51 Lab Code DSW- 294 DSW- 641 DSW- 1056 DSW- 2134 DSW- 2724 DSW- 3892 Date Collected 01-18-11 02-15-11 03-11-11 04-13-11 05-04-11 06-17-11 H-3 < 163 < 145 < 153 < 141 < 143 < 148 Mn-54 < 2.6 < 1.8 < 2.0 < 2.5 < 5.0 < 1.7 Fe-59

• 3.8 < 5.0 < 4.4 < 2.0 < 7.6 < 4.6 Co-58 < 2.6 < 1.7 < 2.6 < 3.3 < 3.1 < 2.4 Co-60 < 3.3 < 1.7 < 1.0 < 1.7 < 5.5 < 1.4 Zn-65 < 6.0 <4.5 < 3.1 < 3.6 < 7.9 < 3.5 Nb-95 < 1.9 < 3.0 < 2.5 < 2.0 < 3.7 < 2.6 Zr-95 < 3.9 < 5.4 <4.9 < 3.7 < 6.9 < 2.6 1-131 < 4.0 < 6.1 < 3.5 < 5.8 < 11.6 < 3.9 Cs-1 34 < 2.0 < 2.4 < 2.1 < 2.1 < 5.0 < 2.0 Cs-137 < 2.8 < 3.4 < 2.5 < 2.4 < 4.4 < 3.1 Ba-140 < 19.4 < 15.6 < 9.5 < 11.2 < 20.4 < 14.4 La-140 < 4.2 < 2.9 < 1.3 < 4.2 < 6.6 < 2.5 Lab Code DSW- 4343 DSW- 5290 DSW- 6075 DSW- 6807 DSW- 7832 DSW- 8567 Date Collected 07-08-11 08-02-11 09-07-11 10-05-11 11-04-11 12-09-11 H-3

• 139 < 149 < 145 < 145 < 148 < 147 Mn-54 <2.1 < 3.0 < 2.7 < 3.1 < 2.2 < 4.6 Fe-59 <2.5 < 4.0 < 3.2 < 3.0 < 6.3 < 8.6 Co-58 < 1.8 < 2.7 < 2.5 < 1.1 < 2.0 < 2.5 Co-60 < 1.6 < 3.5 < 1.9 < 2.1 < 2.7 < 5.6 Zn-65 < 4.9 <4.8 < 3.5 < 2.5 < 5.2 < 7.6 Nb-95 < 3.6 < 2.4 < 2.7 < 3.7 < 2.2 < 3.9 Zr-95 < 5.7 < 5.9 < 2.9 < 4.4 < 3.5 < 6.7 1-131 < 5.5 < 6.7 < 5.3 < 4.0 <4.8 < 6.5 Cs-134 < 2.7 < 2.9 < 2.6 < 2.3 < 2.4 < 4.5 Cs-137 < 3.7 < 3.8 < 2.8 < 3.3 < 1.8 < 3.0 Ba- 140 < 17.3 < 13.1 < 14.8 < 15.7 < 9.6 < 26.4 La-140 < 5.1 < 2.7 < 3.0 < 1.5 < 2.7 < 2,2 16-3

DUANE ARNOLD Table 16. Surface water samples, analyses for iodine-131, tritium and gamma-emitting isotopes.

Collection: Monthly Units: pCi/L Location: D-61 Lab Code DSW- 295 DSW- 642 DSW- 1057 DSW- 2135 DSW- 2725 DSW- 3893 Date Collected 01-18-11 02-15-11 03-11-11 04-13-11 05-04-11 06-17-11 H-3 < 163 < 145 < 153 < 141 < 143

• 148 1-131 (Chemistry) < 0.2 < 0.4 < 0.4 < 0.3 < 0.3

• 0.3 Mn-54 < 1.8 < 2.5

• 2.5 < 2.2 < 4.4 <2.3 Fe-59 < 3.7 < 3.8 < 6.6 < 1.8 < 6.3

• 3.2 Co-58 < 1.1

• 1.2

• 2.7 < 1.7 < 3.3

• 1.7 Co-60 < 1.9 < 2.5 < 3.2

• 1.9 < 2.2 < 2.9 Zn-65

• 3.2 < 2.7 < 4.5

• 1.8 <4.6 < 2.1 Nb-95

• 2.4 < 1.6 < 4.0 < 3.4 < 4.0

• 3.2 Zr-95 < 4.0 < 3.5 < 4.9

• 4.6 < 3.3 < 4.4 1-131 < 3.2 <6.1 < 3.9 < 5.9 < 5.2 < 5.3 Cs-1 34 < 2.6 < 3.0 < 3.0

• 2.3 < 3.6 < 2.4 Cs-1 37 < 2.8 < 3.4 < 2.5 < 1.8 < 3.2 < 2.8 Ba-140 < 10.5 < 13.4 < 19.7 < 14.0 < 21.4 < 11.9 La-140 < 2.4 < 2.6 < 2.2 < 1.7 < 3.9 < 1.9 Lab Code DSW- 4344 DSW- 5291 DSW- 6076 DSW- 6808 DSW- 7833 DSW- 8568 Date Collected 07-08-11 08-02-11 09-07-11 10-05-11 11-04-11 12-09-11 H-3 < 139 < 149 < 145 < 145 < 148 < 147 1-131 (Chemistry) < 0.2 < 0.3 < 0.4 < 0.3 < 0.3 < 0.3 Mn-54 < 3.5 < 1.5 < 2.9 < 2.4 < 2.0 < 3.5 Fe-59 < 4.9 < 4.5 < 4.6 < 3.8 < 3.8 < 5.9 Co-58 < 3.2 < 1.6 < 2.9 < 2.1 < 2.1 < 1.6 Co-60 < 2.1 < 2.1 < 2.3 < 2.5 < 1.9 < 5.7 Zn-65 < 3.5 < 3.0 < 1.9 < 3.7 < 4.4 < 4.9 Nb-95 < 3.4 < 1.6 < 2.8 < 3.1 < 2.3 < 5.9 Zr-95 < 3.3 < 3.2 < 3.9 < 3.4 < 3.7 < 9.1 1-131 < 5.4 < 3.1 < 4.1 < 5.4 < 2.7 < 6.9 Cs-i 34 < 2.9 < 2.4 < 2.9 < 2.6 < 1.8 < 3.9 Cs-1 37 < 3.5 < 2.2 < 3.0 < 2.1 < 3.0 < 5.7 Ba-140 < 15.9 < 8.8 < 9.3 < 12.4 < 10.7 < 18,5 La-140 < 1.5 < 2.3 < 2.4 < 4.5 < 14 < 3.7 16-4

DUANE ARNOLD Table 16. Surface water samples, analyses for iodine-1 31, tritium and gamma-emitting isotopes.

Collection: Monthly Units: pCi/L Location: D-99 Lab Code NDa DSW- 643 DSW- 1058 DSW- 2136 DSW- 2726 DSW- 3894 Date Collected 01-18-11 02-15-11 03-11-11 04-13-11 05-04-11 06-17-11 H-3 < 145 < 153

• 141 < 143 < 148 Mn-54 < 2.8 < 2.1 <2.1 < 5.5 < 1.6 Fe-59 < 5.6 < 3.2 <3.1 < 5.5 < 4.2 Co-58 <2.1 < 2.3 < 1.8 < 3.2 < 2.5 Co-60 < 2.7 < 1.3 < 2.9 < 5.8 < 2.0 Zn-65 < 1.7 < 4.1 < 2.6 < 8.2 < 4.9 Nb-95 < 2.3 < 3.1 < 3.1 < 3.3 < 2.9 Zr-95 < 6.8 < 4.0 < 2.3 < 7.1 < 4.8 1-131 < 6.0 < 3.4 < 4.8 < 6.7 < 5.8 Cs-134 < 1.9 < 2.1 < 1.9 < 5.1 < 2.0 Cs-137 < 2.2 < 3.5 < 3.0 < 6.4 < 3.4 Ba-1 40 < 17.5 < 9,3 < 17.8 < 14.4 < 15.4 La-1 40 < 2.3 < 2.2 < 4.0 < 6.2 < 2.9 Lab Code DSW- 4345 DSW- 5292 DSW- 6077 DSW- 6809 DSW- 7834 DSW- 8569 Date Collected 07-08-11 08-03-11 09-07-11 10-05-11 11-04-11 12-09-11 H-3 < 139 < 149 < 145 < 145 < 148 < 147 Mn-54 < 3.8 < 2.1 < 2.9 < 2.2 < 4.3 < 2.9 Fe-59 < 6.3 < 5.5 < 5.7 < 4.3 < 6.2 < 6.2 Co-58 < 4.7 < 1.4 <1.1 < 2.3 < 3.2 < 1.9 Co-60 < 2.4 < 0.9 < 1,8 < 2.0 < 4.2 < 2.1 Zn-65 < 7.8 < 4.2 < 3.9 < 2.8 < 11.7 < 4.2 Nb-95 < 3.8 < 3.2 < 2.5 < 3.7 < 9.6 < 4,9 Zr-95 < 6.6 < 3.9 < 3.7 < 3.4 < 7.9 < 3.4 1-131 <8.5 < 6.1 < 4.7 < 5.5 < 6.1 < 5.8 Cs-134 < 4.3 < 2.5 < 2.8 < 2.9 < 3.9 < 2.9 Cs-137 <4.1 < 2.0 < 3.4 < 3.2 < 3.8 <4.1 Ba-140 < 16.4 < 15.1 < 17.5 < 14.0 < 19.3 < 15.3 La-140 < 3.7 < 1.7 < 3.8 < 1.7 < 4.6 < 3.1 a ND = No data; see Table 2.0, Listing of Missed Samples.

16-5

DUANE ARNOLD Table 17. Surface water, analysis for strontium.

Collection: Quarterly composites of monthly samples.

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

Lab Code DSW-1144 DSW-3903 DSW-6275 DSW-8681 Sr-89 < 0.58 < 0.60 < 0.73 < 0.79 Sr-90 < 0.51 < 0.48 < 0..53 < 0.44 Location D-61 Period 1 st Qtr, 2nd Qtr. 3rd Qtr. 4th Qtr.

Lab Code DSW-1145 DSW-3904 DSW-6276 DSW-8682 Sr-89 < 0.67 < 0.62 < 0.75 < 0.72 Sr-90 < 0.56 < 0.54 < 0.50 < 0.40 17-1

DUANE ARNOLD Table 18. Fish, analyses of edible portion for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g wet Location Upstream, D-49 Lab Code DF- 3219 DF- 3220 DF- 5977 DF- 5978 Date Collected 05-23-11 05-23-11 08-26-11 08-26-11 Sample Type Cyprinus Carpio Carpiodes Spp. Cyprinus Carpio Moxostoma Sp.

K-40 3.64 +/- 0.40 3.34 +/- 0.42 2.90 +/- 0.36 3.48 +/- 0.40 Mn-54 < 0.014 < 0.014 < 0.009 < 0.014 Fe-59 < 0.017 < 0.027 < 0.033 < 0.029 Co-58 < 0.008 < 0.009 < 0.007 < 0.016 Co-60 < 0.009 < 0.012 < 0.012 < 0.011 Zn-65 < 0.021 < 0.013 < 0.010 < 0.015 Nb-95 < 0.012 < 0.014 < 0.020 < 0.025 Zr-95 < 0.016 < 0.032 < 0.019 < 0.031 Ru-103 < 0.011 < 0.019 < 0.016 < 0.017 Ru-106 < 0.099 < 0.100 < 0.102 < 0.071 Cs-134 < 0.011 < 0.009 < 0.012 < 0.012 Cs-137 < 0.013 < 0.006 < 0.011 < 0.013 Ce-141 < 0.014 < C.027 < 0.028 < 0.026 Ce-144 < 0.076 < 0.067 < 0.087 < 0.081 Location Downstream, D-61 Lab Code DF- 3221 DF- 3223 DF- 5979 DF- 5980 Date Collected 05-23-11 05-23-11 08-26-11 08-26-11 Sample Type Cyprinus Carpio Carpiodes Spp. Cyprinus Carpio Moxostoma Sp.

K-40 2.73 +/- 0.39 3.76 +/- 0.43 3.06 +/- 0.35 3.31 +/- 0.38 Mn-54 < 0.013 < 0.015 < 0.007 < 0.012 Fe-59 < 0.023 < 0.018 < 0.025 < 0.040 Co-58 < 0.007 < 0.010 < 0.007 < 0.012 Co-60 < 0.010 < 0.012 < 0.008 < 0.012 Zn-65 < 0.011 < 0.017 < 0,007 < 0.017 Nb-95 < 0.013 < 0.005 < 0.016 < 0.018 Zr-95 < 0.022 < 0.017 < 0.033 < 0.023 Ru-103 < 0.007 < 0.017 < 0.014 < 0.010 Ru-106 < 0.094 < 0.088 < 0.086 < 0.089 Cs-134 < 0.009 < 0.017 < 0.005 < 0.011 Cs-137 < 0.014 < 0.007 < 0.013 < 0.012 Ce-141 < 0.017 < 0.025 < 0.031 < 0.023 Ce-144 < 0.077 < 0.052 < 0.093 < 0.053 18-1

DUANE ARNOLD Table 19. River sediment, analysis for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g dry Location D-50 (Plant Intake, Control)

Lab Code DBS- 3895 DBS- 8031 Date Collected 06-17-11 11-11-11 K-40 10.74 +/- 0.74 7.66 +/- 0.47 Mn-54 < 0.024 < 0.014 Fe-59 < 0.042 < 0.047 Co-58 < 0.026 < 0.015 Co-60 < 0.018 < 0.012 Zn-65 < 0.048 < 0.039 Nb-95 < 0.020 < 0.019 Zr-95 < 0.050 < 0.029 Ru-103 < 0.025 < 0.019 Ru-106 < 0.18 < 0.10 Cs-134 < 0.022 < 0.011 Cs-137 0.10 +/- 0.037 < 0.012 Ce-141 < 0.072 < 0.046 Ce-144 < 0.19 < 0.10 Location D-51 (Discharge)

Lab Code DBS- 3896 DBS- 8032 Date Collected 06-17-11 11-11-11 K-40 9.36 +/- 0.63 7.51 +/- 0.47 Mn-54 < 0.018 < 0.018 Fe-59 < 0.045 < 0.029 Co-58 < 0.021 < 0.016 Co-60 < 0.009 < 0.012 Zn-65 < 0.035 < 0.035 Nb-95 < 0.028 < 0.026 Zr-95 < 0.034 < 0.041 Ru-103 < 0.019 < 0.016 Ru-106 < 0.10 < 0.15 Cs-134 < 0.018 < 0.011 Cs-137 0.044 +/- 0.022 < 0.016 Ce-141 < 0.053 < 0.047 Ce-144 < 0.14 < 0.11 19-1

DUANE ARNOLD Table 19. River sediment, analysis for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g dry Location D-107A (North Drainage Ditch)

Lab Code DBS- 3897 DBS- 8033 Date Collected 06-17-11 11-11-11 K-40 5.43 +/- 0.41 9.27 +/- 0.54 Mn-54 < 0.015 < 0.021 Fe-59 < 0.024 < 0.044 Co-58 < 0.014 < 0.019 Co-60 < 0.008 < 0.011 Zn-65 < 0.026 < 0.056 Nb-95 < 0.018 < 0.038 Zr-95 < 0.023 < 0.045 Ru-103 < 0.014 < 0.021 Ru-106 < 0.093 < 0.17 Cs-134 < 0.010 < 0.016 Cs-137 < 0.012 0.030 +/- 0.016 Ce-141 < 0.039 < 0.061 Ce-144 < 0.083 < 0.15 19-2

DUANE ARNOLD Table 20.1 Precipitation, monthly collections, analyses for gamma emitting isotopes.

Units: pCi/L Location: DAEC Date Collected 01-20-11 02-24-11 03-10-11 04-28-11 05-16-11 06-23-11 Lab Code DP- 299 DP- 741 DP- 1059 DP- 2728 DP- 3061 DP- 4087 Mn-54 < 3.4 < 5.6 < 5.0 < 2.1 < 3.3 < 1.7 Fe-59 < 6.6 < 9.4 < 12.3 < 3.1

• 4.9

• 3.6 Co-58 < 3.5 < 5.8

• 6.3 < 2.6

• 2.6

• 1.4 Co-60

• 3.6 < 6.9

• 6.7 < 1.9

• 2.3

• 1.7 Zn-65

• 7.5

• 10.8 < 11.0 < 3.5

• 4.7 < 2.3 Nb-95

• 3.9 < 7.0 < 6.0

• 2.6

• 3.5 < 2.8 Zr-95 < 7.7 < 9.3

• 10.5 < 4.1

• 4.5 < 4.4 1-131 < 7.6 < 9.6 < 11.6

• 10.8 < 4.1

• 5.4 Cs-134 < 3.4 < 5.9

• 4.2

• 2.4

• 2.1

• 2.3 Cs-1 37 < 4.5 < 7.0 < 5.4 < 3.0

• 2.6 < 2.6 Ba-140 < 13.8 < 29.7

• 25.1 < 13.4 < 12.8 < 21.7 La-140 < 3.5 < 10.0

• 4.7 < 5.0 < 1.9

• 4.4 Date Collected 07-19-11 08-23-11 09-19-11 10-19-11 11-23-11 12-20-11 Lab Code DP- 4761 DP- 5'56 DP- 6384 DP- 7323 DP- 8290 DP- 8927 Mn-54

• 7.5 < 1.5 < 3.3

• 2.8

• 3.6 < 4.8 Fe-59

• 13.2 < 5.6 < 4.8 < 7.0 < 7.4 < 8.9 Co-58

• 7.6

• 2.3 < 2.6

• 2.0 < 2.4 < 3.9 Co-60 < 6.9 < 2.2 < 3.1 < 3.0 < 4.6 < 5.9 Zn-65 < 11.8

• 2.9 < 6.1 < 4.1 < 6.7

• 8.0 Nb-95 < 8.8 < 2.1 < 2.3 < 2.9 < 5.4 < 3.9 Zr-95

• 12.9 < 4.6 < 7.3 < 3.7 < 7.6

• 12.0 1-131 < 15.4 a

• 2.9

• 4.1 < 4.8

• 7.3

• 9.0 Cs-134 < 7.5

• 2.6

• 2.1 < 3.0

• 3.5 < 5.5 Cs-137 < 7.5 < 3.6 < 2.4 < 3.3 < 5.0 < 6.1 Ba-140 < 54.3 < 11.9 < 14.7

• 16.2

• 16.7 < 17A4 La-140 < 8.5 < 1.9 < 1.3

• 3.8 < 2.9 < 2.7 Table 20.2. Precipitation, quarterly composites of monthly samples, analysis for tritium.

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

Lab Code DP-1128 DP-4153 DP-6431 DP-9223 H-3 < 157 < 168 < 145 < 145 a Sample counted for 60,000 seconds; LLD of 15 pCi/L not reached due to small sample size (0.2 L).

20-1

DUANE ARNOLD Table 21. Soil, analysis for strontium-90 and gamma-emitting isotopes.

Collection: Annually Units: pCi/g dry Location D-15a D-16 Lab Code DSO- 4043 DSO- 4044 Date Collected 06-28-11 06-28-11 Sr-90 0.039 +/- 0.019 0.026 +/- 0.014 H-3 (pCi/L) < 150 < 150 K-40 15.08 +/- 0.84 9.49 +/- 0.60 Mn-54 < 0.032 < 0.017 Fe-59 < 0.033 < 0.034 Co-58 < 0.018 < 0.018 Co-60 < 0.014 < 0.012 Zn-65 < 0.048 < 0.035 Nb-95 < 0.023 < 0.023 Zr-95 < 0.028 < 0.039 Ru-103 < 0.030 < 0.019 Ru-106 < 0.15 < 0.13 Cs-134 < 0.021 < 0.014 Cs-137 0.14 +/- 0.039 0.090 +/- 0.022 Ce-141 < 0.064 < 0.038 Ce-144 < 0.17 < 0.10 21-1

APPENDIX A SUPPLEMENTAL ANALYSES A-1

Table A-1. Precipitation samples for tritium analysis (GWPP).

Lab Code Location Date Collected H-3 (pCi/L) Lab Code Location:ate Collecte( H-3 (pCi/L)

DP- 300 D-111 1/19/2011 526 +/- 108 DP- 303 D-115 1/19/2011 < 163 DP- 742 D-111 2/23/2011 < 148 DP- 745 D-115 2/23/2011

• 148 DP- 1060 D-1118 3/10/2011 252 +/- 104 DP- 1063 D-115 3/10/2011 < 152 DP- 2593 D-111 4/29/2011 186 +/- 82 DP- 2597 D-115 4/29/2011 < 80 DP- 3062 D-111 c 5/16/2011 1549 +/- 128 DP- 3065 D-115 5/16/2011 281 +/-87 DP- 4088 D-111 6/23/2011 < 147 DP- 4092 D-115 6/23/2011 < 147 DP- 4762 D-111 7/18/2011 < 144 DP- 4766 D-115 7/18/2011 < 144 DP- 5757 D-111 8/23/2011 < 146 DP- 5760 D-115 8/23/2011 < 146 DP- 6385 D-111 9/19/2011 < 145 DP- 6389 D-115 9/19/2011 < 145 DP- 7324 D-111 10/19/2011 < 149 DP- 7327 D-115 10/19/2011 < 149 DP- 8291 D-111 11/23/2011 395 +/- 95 DP- 8294 D-115 11/23/2011 304 +/- 91 DP- 8928 D-111 12/20/2011 < 151 DP- 8932 D-115 12/20/2011 < 151 DP- 301 D-112 1/19/2011 262 +/- 97 DP- 304 D-116 1/19/2011 < 163 DP- 743 D-112 2/23/2011 < 148 DP- 746 D-116 2/23/2011 < 148 DP- 1061 D-112b 3/10/2011 437 +/- 111 DP- 1064 D-116 3/10/2011 < 153 DP- 2594 D-112 4/29/2011 494 +/- 96 DP- 2598 D-116 4/29/2011 < 137 DP- 3064 D-112 5/16/2011 556 +/- 97 DP- 3067 D-116 5/16/2011 < 123 DP- 4090 D-112 6/23/2011 220 -' 84 DP- 4093 D-116 6/23/2011 < 147 DP- 4763 D-112 7/18/2011 < 144 DP- 4767 D-116 7/18/2011 < 144 DP- 5758 D-112 8/23/2011 < 146 DP- 5761 D-116 8/23/2011 < 146 DP- 6386 D-112 9/19/2011

• 145 DP- 6390 D-116 9/19/2011 < 145 DP- 7325 D-112 10/19/2011

• 149 DP- 7328 D-116 10/19/2011 < 149 DP- 8292 D-112 11/23/2011 < 146 DP- 8295 D-116 11/23/2011 < 149 DP- 8930 D-112 12/20/2011 < 151 DP- 8933 D-116 12/20/2011 < 151 DP- 1062 D-113 3/10/2011 < 153 DP- 302 D-114 1/19/2011 < 163 DP- 744 D-114 2/23/2011 < 148 DP- 741 D-16 2/24/2011 < 152 DP- 2596 D-114 4/29/2011 < 137 DP- 1059 D-16 3/10/2011 < 152 DP- 3063 D-114 5/16/2011 < 123 DP- 3061 D-16 5/16/2011 559 +/- 101 DP- 4091 D-114 6/23/2011 < 147 DP- 4087 D-16 6/23/2011 < 150 DP- 4764 D-114 7/18/2011 < 137 DP- 4761 D-16 7/19/2011 < 149 DP- 5759 D-114 8/23/2011 < 146 DP- 6388 D-114 9/19/2011 < 145 DP- 6384 D-16 9/19/2011 < 148 DP- 7326 D-114 10/19/2011 < 149 DP- 7323 D-16 10/19/2011 < 147 DP- 8293 D-114 11/23/2011 635 +/- 105 DP- 8290 D-16 11/23/2011 < 146 DP- 8931 D-114 12/20/2011 < 151 DP- 8927 D-16 12/20/2011 < 151 a Analysis was repeated; result of reanalysis: 358 +/- 97 pCi/L.

b Analysis was repeated; result of reanalysis: 499 +/- 104 pCi/L.

Analysis was repeated; result of reanalysis: 1525 +/- 141 pCi/L.

Analysis was repeated; result of reanalysis: 591 +/- 103 pCi/L.

A-2 ti, ;,'

Table A-2. Composite precipitation samples (GWPP), analysis for gamma emitting isotopes.

Units (pCi/L)

Location January February March Lab Code DP- 3898 DP- 3899 DP- 3900 Date Collected 1/19/2011 1/19/2011 3/10/2011 Mn-54 < 8.6 < 4.5 < 4.5 Co-58 < 25.3 < 10.0

• 4.6 Co-60 < 5.6 < 4.1

• 3.0 Zn-65 < 14.9

• 8.2 < 9.5 Cs-134 <4.5 < 3.9 < 3.3 Cs-137 <5.7 < 4.1 < 3.4 Location April May June Lab Code DP- 3901 DP- 3902 DP- 9313 Date Collected 4/29/2011 5/16/2011 6/23/2011 Mn-54 <1.5 < 5.5

• 1.4 Co-58 <2.5 < 4.8 < 9.4 Co-60 <1.5 < 5.1 < 1.0 Zn-65 < 2.8

• 6.7 < 4.5 Cs-134 <1.7

• 3.6 < 1.1 Cs-137 < 2.7 < 4.4 < 1.3 Location July a August September Lab Code DP- 9314 DP- 9315 DP- 9316 Date Collected 7/19/2011 8/23/2011 9/19/2011 Mn-54 < 8.4

• 1.7 < 2.7 Co-58 < 48.1 < 7.0 < 7.9 Co-60 < 6.6

• 1.0 < 1.6 Zn-65 < 21.4 < 3.0 < 5.6 Cs-134 <7.1

• 1.0

• 1.8 Cs-137 <4.0 < 1.0

• 2.4 Location October November December Lab Code DP- 9317 DP- 9318 DP- 9319 Date Collected 10/19/2011 11/23/2011 12/20/2011 Mn-54 <2.9 < 1.3 < 1.1 Co-58 < 7.3 < 2.3 < 2.3 Co-60 <1 .9 < 1.1 < 1.2 Zn-65 < 4.5 < 2.3 < 2.8 Cs-1 34 < 1.7

• 0.9 < 1.4 Cs-137 <2.1 < 1.2 < 1.4

' Elevated detection limits due to small sample volume (0.25 L),

A-3

Table A-3. Ground water (REMP), analyses for gamma emitting isotopes.

Units (pCi/L)

Location D-55 D-55 D-55 Lab Code DWW- 3649 DWW- 5967 DWW- 8071 Date Collected 6/8/2011 9/2/2011 11/15/2011 Mn-54 < 2.6 < 1.9 < 2.8 Co-58 < 3.2 < 2.1

• 1.9 Co-60 *<2.2 < 1.6 < 2.8 Zn-65

• 4.0 < 3.1 < 4.0 Cs-1 34 < 3.7 < 2.5 < 2.6 Cs-i 37 < 3.3 < 2.2 < 2.0 Location D-58 D-58 D-58 D-58 Lab Code DWW- 1161 DWW- 3651 DWW- 5969 DWW- 8073 Date Collected 3/11/2011 6/8/2011 9/6/2011 11/16/2011 Mn-54 < 2.1 <1.1 < 1.2 < 1.0 Co-58 < 15.9 < 7.7

• 2.9 < 1.5 Co-60

• 1.2 < 1.0 < 0.6 < 1.1 Zn-65 < 5.2 < 3.8 < 2.3 < 2.4 Cs-1 34 < 1.3 < 1.3. < 1.1 < 1.1 Cs-137 < 1.1 < 1.4 < 1.3 < 1.0 A-4

_ wllllm Table A-4. Ground water (GWPP), analyses for hard to detect isotopes.

Units (pCi/L)

Lab Code DWW- 5947 DWW- 5948 DWW- 6391 DWW- 6392 Date Collected 9/1/2011 9/1/2011 9/19/2011 9/19/2011 Location MW-08A MW-08B MW-08A MW-08B Gross Alpha < 1.3 < 1.0 < 1.4 1.6 +/- 0.8 Sr-89 < 0.7 < 0.6 < 0.5 < 0.6 Sr-90 < 0.4 < 0.4 < 0.4 < 0.6 Fe-55 < 768 < 759

• 899 < 894 Ni-63

• 121 < 128 < 96 < 110 Lab Code DWW- 6794 DWW- 7380 DWW- 7381 DWW- 8288 Date Collected 8/2/2011 10/21/2011 10/21/2011 11/19/2011 Location MW-08A MW-08A MW-08B MW-12A Gross Alpha < 1.3 < 2.2 < 1.5 < 1.0 Sr-89 < 2.0 < 1.7 < 2.3 < 0.6 Sr-90 <0.5 < 0.5 < 0.7 < 0.6 Fe-55 < 174 < 866 < 935 < 940 Ni-63 < 137 < 121 < 99 < 115 Lab Code DWW- 9024 DWW- 9025 DWW- 9026 Date Collected 11/16/2011 12/21/2011 12/21/2011 Location MW-08B MW-12A MW-08B Gross Alpha < 6.8 14.5 +/- 6 < 7.1 Sr-89 < 13.4 < 9.7 < 7.3 Sr-90 < 6.6 < 7.9 < 5.8 Fe-55 < 902 < 885 < 902 Ni-63 < 93 < 92 < 95 Table A-5. Surface water (GWPP), analyses for hard to detect isotopes.

Units (pCi/L)

Lab Code DXW- 802 Date Collected 2/17/2011 Location MH-209 (Drainage from electrical vaults)

Sr-89 < 1.2 Sr-90 < 0.9 Fe-55 < 728 Ni-63 < 99 A-5

Table A-6. Airborne 1-131 activity detected in charcoal cartridges.

Lab Code Location Date Collected 1-131 (pCi/m 3 )

DCH- 1743 D-03 3/24/2011 0.124 t 0.024 DCH- 1873 D-03 3/31/2011 0.081 +/- 0.027 DCH- 2023 D-03 4/7/2011 0.077 +/- 0.021 DCH- 1745 D-05 3/24/2011 0.150 +/- 0.029 DCH- 1875 D-05 3/31/2011 0.059 t 0.033 DCH- 2025 D-05 4/7/2011 0.088 +/- 0.023 DCH- 1736 D-06 3/24/2011 0.098 +/- 0.021 DCH- 1876 D-06 3/31/2011 0.081 +/- 0.027 DCH- 2026 D-06 4/7/2011 0.081 +/- 0.022 DCH- 1747 D-07 3/24/2011 0.143 +/- 0.033 DCH- 1874 D-07 3/31/2011 0.085 +/- 0.031 DCH- 2027 D-07 4/7/2011 0.080 +/- 0.024 DCH- 1744 D-11 3/24/2011 0.140 +/- 0.028 DCH- 18811 D-11 3/31/2011 0.080 +/- 0.023 DCH- '20311 D-11 4/7/2011 0.100 +/- 0.036 DCH- 17513 D-13 3/24/2011 0.127 +/- 0.028 DCH- 18813 D-13 3/31/2011 0.066 +/- 0.024 DCH- 20313 D-13 4/7/2011 0.080 +/- 0.028 DCH- 17515 D-15 3/24/2011 0.146 +/- 0.028 DCH- 18815 D-15 3/31/2011 0.082 +/- 0.026 DCH- 20315 D-15 4/7/2011 0.083 +/- 0.027 DCH- 17516 D-16 3/24/2011 0.157 +/- 0.037 DCH- 18816 D-16 3/31/2011 0.063 +/- 0.019 DCH- 20316 D-16 4/7/2011 0.072 +/- 0.018 DCH- 17540 D-40 3/24/2011 0.141 +/- 0.038 DCH- 18840 D-40 3/31/2011 0.092 +/- 0.025 DCH- 20340 D-40 4/7/2011 0.077 +/- 0.022 A-6