Text

Submittal of 2020 Annual Radiological Environmental Operating Report
	ML21124A103
Person / Time
Site:	Duane Arnold
Issue date:	05/04/2021
From:	Hansen P; NextEra Energy Duane Arnold
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	NG-21-0011
	Download: ML21124A103 (134)
	v • d • e

NEXTeraM ENERGY~

DUANE ARNOLD May 4, 2021 NG-21-0011 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:

2020 Annual Radiological Environmental Operating Report Please find as Enclosure 1 to this letter, a copy of NextEra Energy Duane Arnold, LLC's 2020 Annual Radiological Environmental Operating Report for the Duane Arnold Energy Center, pursuant to the requirements of DODAM Section 8.2.2 and Technical Specification Section 5.6.2.

This letter contains no new commitments and does not revise any existing commitments.

Should you have any questions regarding this matter, please contact Michael Casey at (319) 851-7606.

Sincerely,

~Raf\\~"

Paul Hansen Decommissioning Director NextEra Energy Duane Arnold, LLC Enclosure cc:

Regional Administrator, USNRC, Region Ill Inspector, USNRC, Duane Arnold Energy Center Project Manager, USNRC, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Palo, IA 52324

Duane Arnold Energy Center 2020 Annual Radiological Environmental Operating Report 132 pages follow Enclosure to NG-21-0011

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ARNOLD 2020 Annual Radiological Environmental Operating Report Duane Arnold Energy Center Cedar Rapids, Iowa Docket No. 50-331 January 1, 2020 through December 31, 2020

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2020 Annual Radiological Environmental Operating Report Duane Arnold Energy Center DOCKET NUMBER. 50-331 Prepared By: n ~

Daron Tanko Date:

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Approved By:

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Paul Ilansen Date: %11 /?-1 I

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DUANE ARNOLD ENERGY CENTER CEDAR RAPIDS, IOWA DOCKET NO. 50-331 REPORT to the UNITED STATES NUCLEAR REGULATORY COMMISSION Annual Radiological Environmental Operating Report January 1 to December 31, 2020 Ashok Banavali, Ph.D.

Laboratory Manager Prepared by ATI ENVIRONMENTAL. Inc.

Midwest Laboratory Project No. 8001

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.

TABLE OF CONTENTS No.

PREFACE..................................................................................................................... ii List of Tables................................................................................................................. v List of Figures............................................................................................................... vi

1.0 INTRODUCTION

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

SUMMARY

.................................................................................................................... 2 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM............................... 3 3.1 Program Design and Data Interpretation.......................................................... 3 3.2 Program Description............................................................................................. 4 3.2.1 Environmental Monitoring........................................................................4 3.2.2 Groundwater Protection Program............................................................ 5 3.3 Program Execution............................................................................................... 5 3.4 Laboratory Procedures..................................................................................... 6 3.5 Program Modifications.......................................................................................... 6 4.0 RESULTS AND DISCUSSION...................................................................................... 7 4.1 Atmospheric Nuclear Detonations and Nuclear Accidents..................................... 7 4.2 Program Findings................................................................................................. 7 4.3 Groundwater Protection Program Findings......................................................... 9 5.0 TABLES AND FIGURES............................................................................................. 11

6.0 REFERENCES

CITED................................................................................................ 27 APPENDICES A

lnterlaboratoryComparison Program Results............................................................ A-1 B

Data Reporting Conventions............................................................................................ 8-1 C

Effluent Concentration Limits for Radioactivity in Air and Water Above Background in Unrestricted Areas............................................................................. C-1 D

Summary of the Land Use Census............................................................................ D-1 E

Annual Radiation DoseAssessment......................................................................... E-1 iii

TABLE OF CONTENTS (continued)

PARTll Data Tabulations and Analyses...................................................................................... i iv

LIST OF TABLES 5.1 Characteristic Properties of Isotopes Quantified in Gamma-spectroscopic Analyses.................................................................................................................... 12 5.2 Sample Collection and Analysis Program..................................................................... 13 5.3 Sampling Locations, DAEC.......................................................................................... 15 5.4 Type and Frequency of Collections.............................................................................. 17 5.5 Sample Codes for Tables 5.4 and 5.6.......................................................................... 18 5.6 Program Deviations.......................................................................................................... 19 5.7 Radiological Environmental Monitoring Program Summary......................................... 21 In addition, the following tables are included in the Appendices:

Appendix A A-0 Attachment............................................................................................................................. A0-2 A-1 Environmental Resource Associates (RAD)............................................................... A 1-1 A-2 lnterlaboratory Comparison Program Results, Thermoluminescent Dosimeters (TLDs)........................................................................................ A2-1 A-3 In-house "Spiked" Samples....................................................................................... A3-1 A-4 In-house "Blank" Samples........................................................................... A4-1 A-5 In-house "Duplicate" Samples................................................................................. A5-1 A-6 Department of Energy MAPEP comparison results................................................. A6-1 A-7 Environmental Resource Associates (MRAD)......................................................... A7-1 AppendixC C-1 Effluent Concentration Limits for Radioactivity in Air and Water Above Background in Unrestricted Areas..................................................... C-2 v

LIST OF FIGURES 5.1 Radiological Environmental Monitoring Program Sampling Stations near the Duane Arnold Energy Center......................................................................... 25 5.2 Radiological Environmental Monitoring Program Sampling Stations Outside 0.5 Miles......................................................................................................... 26 vi

1.0 INTRODUCTION

This report summarizes and interprets results of the Radiological Environmental Monitoring Program (REMP) conducted by Environmental, Inc., Midwest Laboratory at the Duane Arnold Energy Center, Palo, Iowa, during the period January - December 2020. 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.

The REMP fulfills the requirements of Sections IV.B.2 and IV.B.3 of Appendix I to 10 CFR 50 for the operation of the plant. The REMP also fulfills the requirements of 10 CFR 72.44(d)(2) for operation of the ISFSI.

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, 197 4. The reactor reached 100% power on August 12, 197 4. Commercial operation began on February 1, 1975.

In July of 2018, NextEra Energy Duane Arnold L.L.C. announced the cessation of power operations planned for the 41h quarter of 2020. However, a severe windstorm on August 10, 2020, damaged the plant's cooling towers. There were no abnormal releases as all safety systems functioned as designed.

The reactor was permanently defueled on October 12, 2020.

The decommissioning process has started with the layup plans for long term dormancy period prior to returning the area to a greenfield.

The plant is being placed in SAFSTOR.

2.0

SUMMARY

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

Results for the year 2020 are summarized and discussed. Information regarding DAEC effluents and the Offsite Dose Assessment Manual (ODAM) and Defueled Offsite Dose Assessment Manual (DODAM) can be found in the 2020 DAEC Annual Radiological Material Release Report (ARM RR).

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

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

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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 (Eisen bud, 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-?,

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.

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 3

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, a continuous air sampler is employed. Airborne particulates and activated charcoal canisters are mounted on the intake of the air sampler to collect airborne particulates and airborne iodine respectively at ten sampling locations. Nine locations are indicators: D-3, D-4, D-5a, D-6, D-7, D-11, D-15, D-16, D-40, and control location 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 canister samples are analyzed weekly for iodine-131.

Ambient gamma radiation is monitored at a total of 52 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 22.5° sectors between 1 and 3 miles from the DAEC stack.

Twelve control locations greater than 3 miles from the DAEC stack.

Four along sections of the Independent Spent Fuel Storage Installation (ISFSI) fence line.

Surface water is collected monthly from five total locations: D-49, D-50, D-51, D-61 and 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 at D-49 and D-61 with semiannual fish collection.

Cedar River bottom sediment is collected semiannually at the D-49, D-51, and D-107a. The samples are analyzed for gamma-emitting isotopes.

Drinking water is collected monthly from D-53, D-54, and D-52, and quarterly from D-55, D-57, D-58 and control location D-72. The samples are analyzed for tritium and gamma emitting isotopes. Any positive identification of a reactor by-product material initiates analyses for hard to detect isotopes of Ni-63, Sr-89, Sr-90, Fe-55 and gross alpha. The samples are analyzed for tritium, 1-131 by chemical separation to an MDC of 1 pCi/L, and gamma emitting isotopes.

For 2020, dairy cow milk was collected monthly from one indicator D-110 and D-138. Monthly sampling was determined to be sufficient due to the milk sampling locations more than five miles from the facility. The samples are analyzed for iodine-131 and gamma-emitting isotopes. This dairy cow milk sampling is supplemented with goat's milk when available from indicator location D-

76.

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Additional monitoring of the terrestrial environment,

grain, hay, grass and broadleaf vegetation samples are collected annually, as available, from eight locations: D-138 and seven indicators D-57, D-58, D-77, D-96, D-109, D-110, D-118, and D-138. Grain, hay and broadleaf (green leafy) vegetation samples are analyzed for gamma-emitting isotopes and at least two broad leaf vegetation samples are analyzed for iodine-131.

If any of the cattle grazing on-site are slaughtered for home use, a meat sample is collected.

The sample is analyzed for gamma-emitting isotopes.

3.2.2 Groundwater Protection Program Environmental, Inc., Midwest Laboratory provides laboratory services for the Duane Arnold Energy Center Groundwater Protection Program (GWPP). The GWPP is formally included within REMP and the standards are set forth in the ODAM-DODAM, Table 6.3-2. The Groundwater Protection Program encompasses activities to ensure the protection of groundwater within the owner-controlled area by sampling the groundwater, soil, precipitation, electrical vaults and sewage effluent. For sewage effluent results only, refer to the Duane Arnold Energy Center, 2020 Annual Radioactive Material Release Report and Table 22 of Part 11 of this report for groundwater, soil, electrical vault, and precipitation sample results.

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

(1) REMP Air Samplers for Airborne Particulates I Airborne Iodine:

D-16, sample damaged 217120.

D-04, sample damaged 2/21/20.

D-15, sample not collected 8/21 /20 due to an area power outage from 8/10/20 windstorm.

(2) Thermoluminescent Dosimetry (TLD):

D-91, TLD for 2nd quarter was missing from field, likely vandalized.

D-05, D-18, D-28, D-39, D-42 and D-82 TLD's for the 3rd quarter were all lost in field due to severe windstorms in the area.

(3) Milk:

D-76, goat milk was unavailable throughout 2020 due to limited herd production.

D-138, milk unavailable for collection due to 8/10/20 windstorm, which caused considerable damage and rendered location D-138 unviable for milk collection for the remainder of 2020.

D-110, milk unavailable for collection 12/15/20.

(4) Well Water:

D-52, Sample not collected 8/17 /20 due to system structural damage.

(5) Surface Water:

D-99, surface water sample not available 2/25/20 due to frozen conditions.

D-51, D-61 and D-99 surface water samples not collected 8/19/20 due to fallen trees blocking access to area.

D-51 surface water sample not collected 10/08/20 due to fallen trees blocking access to area.

5

3.4 Laboratory Procedures The lodine-131 analyses in milk and water are based on EPA recognized Standard Method 7500-l-C(2000), which involves 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 spectrometry.

Analytical Procedures used by Environmental, Inc. are on file and are available for inspection.

Procedures are based on those prescribed by the Health and Safety Laboratory of the U.S. Dep't of Energy, Edition 28, 1997, U.S. Environmental Protection Agency for Measurement of Radioactivity in Drinking Water, 1980, and the U.S. Environmental Protection Agency, EERF, Radiochemical Procedures Manual, 1984.

Environmental, Inc., Midwest Laboratory has a comprehensive quality control/quality assurance program designed to assure the reliability of data obtained. Details of the QA Program are presented elsewhere (Environmental, Inc., Midwest Laboratory, 2018). The QA Program includes participation in lnterlaboratory Comparison (crosscheck) Programs.

Results obtained in crosscheck programs are presented in Appendix A.

3.5 Program Modifications There were a few changes to the REMP program in 2020 except for the elimination of milk sampling after November 2020. R EMP and GWPP standards and requirements can be found in the Duane Arnold Energy Center 2020 Annual Radiological Material Release Report in, ODAM and Attachment 3, DODAM.

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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 2020 is contained in Part II of the Annual Report on the Radiological Environmental Monitoring Program for the Duane Arnold Energy Center.

4.1 Atmospheric Nuclear Detonations and Nuclear Accidents There were no reported accidents involving significant release to the environment at nuclear reactor facilities in 2020. The Fukushima Daiichi nuclear accident occurred March 11, 2011.

There were no reported atmospheric nuclear tests in 2020. The last reported test was conducted on October 16, 1980 by the People's Republic of China 4.2 Program Findings Results obtained show background levels of radioactivity in the environmental samples collected outside of the Owner Controlled Area in 2020. The trace levels of cesium-137, still measurable in soil, are attributed to deposition of fallout from nuclear weapons testing from previous decades.

Airborne Particulates The average annual gross beta concentrations in airborne particulates were the same at both the indicator and control locations (0.026 pCi/m3) and similar to levels observed from 2000 through 2020. The results are tabulated below.

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

Concentration (pCi/m3) 2000 0.026 0.027 2011 0.030 0.029 2001 0.026 0.026 2012 0.030 0.029 2002 0.027 0.027 2013 0.028 0.025 2003 0.029 0.029 2014 0.026 0.025 2004 0.028 0.028 2015 0.027 0.024 2005 0.031 0.031 2016 0.027 0.023 2006 0.029 0.027 2017 0.028 0.025 2007 0.031 0.031 2018 0.028 0.026 2008 0.029 0.029 2019 0.026 0.025 2009 0.031 0.030 2020 0.026 0.026 2010 0.028 0.028 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,produced continuously in the upper atmosphere by cosmic radiation (Arnold and Al-Salih, 1955), was detected in all samples, with an average activity of 0.081 pCi/m3 for indicator locations and 0.080 pCi/m3 for the control location.

No reactor by-product radionuclides were identified. All samples met required lower limits of detection as specified in the ODAM.

Airborne Iodine 517 weekly air samples were collected in 2020 from ten air monitoring stations. Levels of airborne iodine-131 measured below the required limit of 0.030 pCi/m3 with the exception of the samples collected at location D-16 for the week ending 02/07/20 (sample damage), location D-04 for the week ending 02/21/20 (sample damage) and at location D-15 for the week ending 08/21/20 (sample damage).

Ambient Radiation (TLDs) 201 TLDs were collected and analyzed in 2020. At twelve control locations, thermoluminescent dosimeter (TLD) readings averaged 16.4 mR/quarter. At locations within a half mile, one mile and three mile radius of the stack, the measurements averaged 18.2, 18.9 and 16.6 mR/quarter, respectively. The two on-site locations D-15 and D-16 averaged 15.3 and 17.5 mR/quarter respectively. These average measurements are similar to the estimated average natural background radiation for Middle America, 19.5 mR/quarter, which is based on data on Pages 71 and 108 of the report, "Natural Background Radiation in the United States" (National Council on Radiation Protection and Measurements, 1975). The terrestrial absorbed dose (uncorrected for structural and body shielding) ranges from 8.8 to 18.8 mrad/quarter and averages 11.5 mrad/quarter for Middle America. Cosmic radiation and cosmogenic radionuclides contribute 8.0 mrad/quarter for a total average of 19.5 mrad/quarter. No plant effect is indicated.

ISFSI Facility Operations Monitoring Four TLDs, placed directionally along the ISFSI fence line, averaged 34.8 mR/quarter. The TLD site D-30, located between the nearest residence and the ISFSI site averaged 17.4 mR/quarter.

Calculated dose rates indicate the site is in compliance with 10 CFR 72.104 and 40 CFR 190.

18 milk samples were collected from two commercial dairies in 2020. lodine-131 concentrations in milk samples were less than the LLD level of 1.0 pCi/L.

No gamma-emitting isotopes, excepting naturally occurring potassium-40, were detected in any milk samples. This is consistent with findings that most radio-contaminants 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).

No reactor by-product radionuclides were identified. All samples met required lower limits of detection as specified in the ODAM.

Groundwater (drinking water-potable) 53 drinking water samples from seven locations were collected in 2020. Tritium concentrations in ground water samples were less than the MDC of 161 pCi/L in all samples analyzed. Gamma-emitting isotopes were below detection limits.

No reactor by-product radionuclides could be identified. All samples met required lower limits of detection as specified in the ODAM.

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4.2 Program Findings (continued)

Vegetation Twelve broadleaf and nine grain and forage vegetation samples from nine locations were collected in 2020. lodine-131 concentrations in vegetation samples were less than the LLD level of 0.059 pCi/g wet weight in all samples analyzed.

With the exception of potassium-40, which was observed in all vegetation samples, all other gamma-emitting isotopes were below detection limits. No reactor by-product radionuclides were identified. All samples met required lower limits of detection as specified in the ODAM.

Surface Water 55 surface water samples were collected from five locations in 2020. Surface water was tested for tritium and gamma emitting isotopes. No measurable tritium activity was detected above an LLD of 161 pCi/L.

Analyses for 1-131 were performed on samples from locations D-49 (control) and D-61 (0.5 mi.

downstream, indicator). No measurable 1-131 was detected above an LLD of 0.5 pCi/L.

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.

Ten fish samples from five sport fish species were collected in June and August, 2020, 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 (10.72 and 7.17 pCi/g wet, respectively).

No reactor by-product radionuclides were identified. All samples met required lower limits of detection as specified in the ODAM.

River Sediments Six river sediment samples from three locations were collected in 2020 during the months of July and October, and analyzed for gamma-emitting isotopes. Potassium-40 activity ranged from 4.38 to 8.24 pCi/g dry weight at the indicator locations and between 7.16 and 7.60 pCi/g dry weight at the control location.

All samples met required lower limits of detection as specified in the ODAM-DODAM.

4.3 Ground Water Protection Program Findings Environmental, Inc., Midwest Laboratory provides laboratory services for the Duane Arnold Energy Center Ground Water Protection Program except for sewage effluent results; refer to Appendix E.

Sewage effluent sample results can be found in the Duane Arnold Energy Center 2020 Annual Radiological Material Release Report.

Groundwater 284 groundwater samples (non-potable water) were collected from 56 permitted monitoring wells and three permitted extraction wells in 2020. Tritium was the only plant by-product identified.

Concentrations of tritium ranged from less than 150 pCi/L to 51,271 pCi/L at D-128A, monitoring 9

well MW-08A. An explanation of tritium mitigation can be found in the Duane Arnold Energy Center 2020 Radioactive Material Release Report. Tritium was not identified in any drinking water well on-site or at off-site wells or Cedar Rapids municipal drinking water samples. Lastly, the monitoring well farthest down gradient prior to the boundary of the owner-controlled area and the Cedar River, MW-33A, did not indicate tritium above the lower level of detection, less than 168 pCi/L.

Two soil samples were collected in 2020, from D-15a and from D-16. Both samples were positive for cesium-137 with an average level of 0.08 pCi/g dry weight which is consistent with previous results at these locations. The cesium-137 source is determined to be from nuclear weapons testing and not from plant activities.

Precipitation 82 precipitation samples were collected in 2020 from eight precipitation collection locations. Tritium was consistently identified at locations D-127 and D-128. Tritium concentrations range from less than 150 pCi/L to 1,380 pCi/L (+/- 134 pCi/L) from D-127. The proximity of the plant gaseous effluent release points coupled with atmospheric conditions enables recapture of gaseous effluent, specifically tritiated water vapor, to be entrained in precipitation and deposited within the protected area. Occasionally, tritiated precipitation collects in a basin or pit. This water is then sampled and released in accordance with the ODAM-DODAM, Table 7.1-2.

Electrical Vaults 15 electrical vaults samples were collected in 2020 from six electrical vaults. Electrical vaults are below grade structures designed for electrical cabling. Surface water and groundwater may seep into the vaults. Tritium concentrations range from less than 157 pCi/L to 261 pCi/L (+/- 92 pCi/L) from D-119, which is consistent with rainfall recapture of tritiated water vapor from plant gaseous effluent release points.

Storm Drains. Sluice Pond. and Drainage Ditches.

35 samples were collected in 2020 from storm drains, sluice ponds and drainage ditches. Surface water sampling from these locations is consistent with non-point source runoff sampling activities.

Similar to electrical vaults, tritium recapture is the source for tritium. Tritium concentrations range from less than 157 pCi/L to 4,867 pCi/L(+/- 221 pCi/L) from D-1258.

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5.0 TABLES AND FIGURES I I

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

Designation Comment Isotope Half-life a Naturally Occurring A. Cosmogenic Produced by interaction of cosmic rays Be-7 53.2 d with atmosphere B. Terrestrial Primordial K-40 1.26x109 y II. Fission Products b Nuclear accidents and detonations constitute the major environmental source.

A. Short-lived 1-131 8.04 d Ba-140 12.8 d B. Other than Short-lived Nb-95 35.15 d Zr-95 65 d Ru-103 39.35 d Ru-106 368.2 d Cs-134 2.061 y Cs-137 30.174y Ce-141 32.5 d Ce-144 284.31 d Ill. Activation Products Typically found in nuclear power plant Mn-54 312.5 d effluents Fe-59 45.0 d Co-58 70.78 d Co-60 5.26 y Zn-65 245 d Half-lives are taken from Appendix E of Environmental Quarterly, 1 January 1978, EML-334 (U. S. Department of Energy, 1978).

Includes fission-product daughters.

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Table 5.2 Sample collection and analysis program.

Sampling Location a Exposure Sample Description Pathway and/or Point Sample Type Airborne Particulates Airborne Iodine Ambient Radiation 3

4 5A 6

7 11 13 15 16 40 3

4 5A 6

7 11 13 15 16 40 1-3, 5A, 6-8 10, 11, 13 15-23, 28-32, Hiawatha Pleasant Creek SRA Palo Center Point Shellsburg Toddville Alburnett (C)

On-site North On-site South Wickiup Hill Hiawatha Pleasant Creek SRA Palo Center Point Shellsburg Toddville Alburnett (C)

On-site North On-site South Wickiup Hill (Controls)

(Controls)

(Indicators)

Within 0.5 mile of Stack 4, 33-42 Within 3.0 miles of Stack 43-48 Within 1.0 mile of 82-86, 91 Stack 161-164 ISFSI Fence line Sampling and Collection Frequency Continuous operation of sampler with sample collection at least once per week or as required by dust loading Continuous operation of sampler with sample collection at least once per week.

One dosimeter continuously at each location.

Dosimeters are changed at least quarterly.

Surface Water 49 Lewis Access (C)

Once per month.

50 Plant Intake 51 Plant Discharge 61

- Y, mi. downstream from Plant Discharge 99 Pleasant Creek Lake 13 Type and Frequency of Analysis b Analyze for gross beta activity more than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after filter change.

Perform gamma isotopic analysis on each sample having gross beta activity greater than ten times the yearly mean of the control samples.

Composite weekly samples to form a quarterly composite (by location).

Analyze quarterly composite for gamma isotopic.

Analyze each cartridge for iodine-131.

Read gamma radiation dose quarterly.

Gamma isotopic and tritium analysis for each sample (by location).

Locations 49 and 61, analyses for low-level 1-131. Quarterly composites for Sr-89, Sr-90.

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

Sampling Location a Exposure Sample Description Sampling and Collection Type and Frequency Pathway and/or Point Frequency of Analysis b Sample Type 52 Plant potable water Ground Water 53 Treated Municipal Grab sample at least Analysis gamma emitting isotopes, Water once per quarter iodine-131 and tritium on quarter!~

54 Inlet to Municipal Water samples.

Treatment System 55 On-site well If reactor by-product gamma 57, 58 Wells off-site and emitters are identified, or if tritium 72 (C) within 4 km of DAEC concentrations measure > MDA, then analyze for Ni-63, Sr-89, Sr-90 and alpha emitters.

River 49 Lewis Access At least once every six Gamma isotopic analysis of each Sediment months.

sample 50 Plant Intake (C) 51 Plant Discharge 107a North Drainage Ditch (on-site)

Vegetation 16,57 Farms raising food Annually at harvest Gamma isotopic analysis, 56, 57, crops time. Two samples of including iodine-131, on each 58,59,77, each: grain, green leafy, sample.

96,108, and forage.

110,118 138 (C)

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

influenced by effluent January through June (C) and once during July through December).

56 Downstream of DAEC 61 in influence of effluent Milk 138 (C)

Farm near Newhall, IA Monthly.

Gamma isotopic and iodine-131 analyses of each sample.

110 Dairy Farm within 7.8 Monthly.

miles from Site 76 Goat Farm ENE of site.

Monthly depending on availability.

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

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

14

Table 5.3 Sampling locations, Duane Arnold Energy Center.

Sampling Location Code Location Description Distance and Direction from Site Stack D-1 Cedar Rapids 20,800 meters SE D-2 Marion 16,900 meters ESE D-3 Hiawatha 10,800 meters SE D-5 Palo 4,500 meters SSW D-4 Pleasant Creek SRA 4,960 meters NW D-5A Palo 3,470 meters SSW D-6 Center Point 9,660 meters N D-7 Shellsburq 7,950 meters W D-8 Urbana 15,000 meters NNW D-10 Atkins 13,600 meters SSW D-11 Toddville 4,980 meters E D-13 Alburnett 14,500 meters ENE D-15 On-site, North-Northwest 1,050 meters NNW D-16 On-site, South-Southeast 520 meters SSE D-17 On-site, N 1,050 meters N D-18 On-site, NNE 630 meters NNE D-19 On-site, NE 590 meters NE D-20 On-site, ENE 550 meters ENE D-21 On-site, ENE 515 meters ENE D-22 On-site, ESE 535 meters ESE D-23 On-site, SE 490 meters SE D-28 On-site, WSW 730 meters WSW D-29 On-site,W 630 meters W D-30 On-site, WNW 640 meters WNW D-31 On-site, NW 1,020 meters NW D-32 On-site, NNW 1,110meters NNW D-33 3 mile rinq 4,340 meters N D-34 3 mile rinq 3,930 meters NNE D-35 3 mile rinq 2,800 meters NE D-36 3 mile ring 3,500 meters ENE D-37 3 mile ring 2,960 meters E D-38 3 mile rinq 3, 180 meters ESE D-39 3 mile rinq 2,510 meters SE D-40 3 mile rinq 2,430 meters SSE D-41 3 mile ring 5,680 meters S D-42 3 mile rinq 4,380 meters SSE D-43 1 mile rinq 1,590 meters SSW D-44 1 mile rinq 1,580 meters WSW D-45 1 mile ring 1,420 meters W D-46 1 mile rinq 1,580 meters WNW D-47 1 mile rinq 1, 760 meters NW D-48 1 mile rinq 1,680 meters NNW 15

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

Sampling Location Code Location Description Distance and Direction from Site Stack D-49 Lewis Access, upstream of DAEC 6,750 meters NNW D-50 Plant Intake 560 meters SE D-51 Plant Discharge 600 meters SE D-52 Plant potable water On-site D-53 Treated Municipal Water 13,900 meters SE D-54 Inlet, Municipal Water Treatment System 13,900 meters SE D-55 Production Well Production wells A-D D-56 Control samples from various locations Sample location varies D-57 Farm (Off-site Well) 805 metersW D-58 Farm (Off-site Well) 97 4 meters WSW-SW D-61 Downstream of plant discharge 670 meters SSE D-59 Hobby farm 2.615 meters SE D-72 Farm 3,200 meters SSW D-76 Farm 2,888 meters ENE D-77 Farm 2,288 meters SW D-82 On-site, SSE 660 meters SSE D-83 On-site, SSE 620 meters SSE D-84 On-site, S 610 meters S D-85 On-site, SSW 660 meters SSW D-86 On-site, SW 850 meters SW D-91 On-site, NNW 1,090 meters NNW D-96 Farm 11,400 meters SSW D-99 Pleasant Creek Lake 3,880 meters WNW D-107a North Drainage Ditch On-site D-109 Farm 5,890 meters SW D-110 Farm 12,700 meters SW D-118 Farm 2,230 meters NW D-138 Farm 21,600 meters WSW 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 16

Table 5.4 Type and Frequency of collection.

Location Weekly Monthly Quarterly Semiannually Annually D-1 TLD D-2 TLD D-3 AP,AI TLD D-4 AP,AI TLD D-5 TLD D-5A AP,AI TLD D-6 AP,AI TLD D-7 AP,AI TLD D-8 TLD D-10 TLD D-11 AP,AI TLD D-13 AP,AI TLD D-15 AP,AI TLD D-15a so D-16 AP,AI TLD G,SO D-17 to D-23 TLD D-28 to D-39 TLD D-40 AP,AI TLD D-41 to D-48 TLD D-49 SW F

D-50 SW BS D-51 SW BS D-52 WW D-53 WW D-54 WW D-55 WW D-56 D-57 WW G

D-58 WW D-59 G

D-61 SW F

D-72 WW D-76 Ml D-77 G

D-82 to D-86 TLD D-91 TLD D-99 SW ME**

D-107A BS D-108 G

D-110 Ml G

D-118 G

D-138 Ml G

D-161 to D-164 TLD On-site

Goat's milk sampled when available.

- Meat sampled when available.

17

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 Ml Milk WN Well Water G

Vegetation ME Meat SW Surface Water F

Fish BS River Sediment so Soil 18

Table 5.6. Program Deviations, Duane Arnold Energy Center.

Sample Type Analysis Ml AP/Al Ml AP/Al SW Ml Ml Ml TLD Ml Ml Ml Ml WW SW SW SW AP/Al Location(s)

D-76 D-16 D-76 D-04 D-99 D-76 D-76 D-76 D-91 D-76 D-76 D-76 D-138 D-52 D-51 D-61 D-99 D-15 Collection Date or Period 01-09-20 02-07-20 02-11-20 02-21-20 02-25-20 03-11-20 04-14-20 05-12-20 2nd Qtr '20 06-16-20 07-14-20 08-11-20 08-11-20 08-17-20 08-19-20 08-19-20 08-19-20 08-21-20 19 Comments Goat's milk unavailable due to limited herd production.

Sample damaged; appears very light.

Samples discarded.

Goat's milk unavailable due to limited herd production.

Sample damaged; appears very light; Samples discarded.

No sample; river frozen.

Goat's milk unavailable due to limited herd production.

TLD lost in field.

Goat's milk unavailable due to limited herd production.

Location inaccessible due to extreme damage after severe winds in area.

Sample not collected due to system structural damage.

Sample not collected due to fallen trees blocking access to the area.

Sample not collected due to fallen trees blocking access to area.

No power at the station due to severe damage in the area. Samples not collected.

Table 5.6. Program Deviations, Duane Arnold Energy Center.(Continued).

Sample Type Analysis TLD TLD TLD TLD TLD TLD Ml Ml SW Ml Ml Ml Ml Ml Ml Ml Location( s)

D-05 D-18 D-28 D-39 D-42 D-82 D-76 D-138 D-51 D-76 D-138 D-76 D-138 D-76 D-110 D-138 Collection Date or Period 3rd Qtr '20 3rd Qtr '20 3rd Qtr '20 3rd Qtr '20 3rd Qtr '20 3rd Qtr '20 09-15-20 09-15-20 10-08-20 10-15-20 10-15-20 11-17-20 11-17-20 12-15-20 12-15-20 12-15-20 20 Comments TLD lost in field due to severe wind storms in the area.

TLD lost in field due to severe wind storms in the area.

TLD found broken, declared lost due to the strong windstorms in the area.

Goat's milk unavailable due to limited herd production.

Sample location no longer viable for milk collection due to derecho storm damage on 08/10/20.

Sample not collected due to fallen trees in area.

Goat's milk unavailable due to limited herd production.

Sample location no longer viable for milk collection due to derecho storm damage on 08/10/20.

Goat's milk unavailable due to limited herd production.

Sample location no longer viable for milk collection due to derecho storm damage on 08/10/20.

Goat's milk unavailable due to limited herd production.

Sample not available.

Sample location no longer viable for milk collection due to derecho storm damage on 08/10/20.

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Location of Facility Sample Type and Type Number of (Units)

Analyses a Airborne Particulates GB 517 (pCi/m3)

GS 40 Be-7 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 Airborne Iodine (pCi/m3) 1-131 517 TLDs (m R/quarter)

Gamma 47 Control Locations Within 0.5 mi. of Gamma 76 Stack Within 1.0 mi. of Gamma 24 Stack Within 3.0 mi.of Gamma 38 Stack ISFSI border Gamma 16 Duane Arnold Energy Center Linn, Iowa Docket No.

Reporting Period Indicator Location with Highest Annual Mean Locations LLD b Mean (F) 0 Mean (F) 0 Range 0

Location" Range 0

Airborne Pathway 0.003 0.026 (465/465)

D-16 0.028(51/51)

(0.001-0.065)

(0.012-0.056) 0.020 0.081 (36/36)

D-11 0.092 (4/4)

(0.056-0.114)

(0.076-0.110) 0.0013

<LLD 0.0034

<LLD

<LLD 0.0012 0.0015

<LLD

<LLD 0.0055 0.0016

<LLD 0.0027

<LLD 0.0016

<LLD 0.0107

<LLD 0.0016

<LLD

<LLD 0.0013

<LLD 0.0027 0.0067

<LLD 0.030

<LLD Direct Radiation 1.0 None D-5 19.1 (3/3)

(15.5-23.7) 1.0 21.5 (76/76)

D-17 21.5(4/4)

(9.3-24.6)

(19.3-24.4) 1.0 18.9 (24/24)

D-46 20.2(4/4)

(12.9-23.5)

(18.0-23.5) 1.0 16.6 (38/38)

D-41 19.3(4/4)

(11.4-23.3)

(16.9-23.3) 1.0 34.8 (16/16)

D-161 52.8 (4/4)

(15.0-34.8)

(41.4-69.5) 21 50-331 January-December, 2020 Control Number Locations Non-Mean (F) c Routine Range c Results e 0

0.026 (53/53)

(0.009-0.071) 0.080(4/4) 0 (0.065-0.100)

<LLD 0

16.4 (47/47) 0 (11.2-23.7)

None 0

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Location of Facility Sample Type and Type Number of (Units)

Analyses' Surface Water H-3 55 (pCi/L) l-131chem 23 Sr-89 8

Sr-90 8

GS 55 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 Sediments GS 6

(pCi/gdry)

K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 Duane Arnold Energy Center Linn, Iowa Indicator Locations LLD b Mean (F)'

Range' Waterborne 177

<LLD 0.5

<LLD 0.69

<LLD 0.57

<LLD 6.8

<LLD 11.4

<LLD 6.0

<LLD 5.3

<LLD 19.2

<LLD 10.8

<LLD 12.4

<LLD 13.8

<LLD 6.8

<LLD 34.5

<LLD 10.7

<LLD 6.05 (4/4) 1.0 (4.38-8.24) 0.017

<LLD 0.051

<LLD 0.023

<LLD 0.014

<LLD 0.033

<LLD 0.028

<LLD 0.035

<LLD 0.031

<LLD 0.101

<LLD 0.012

<LLD 0.015

<LLD 0.068

<LLD 0.064

<LLD 22 Docket No.

Reporting Period Location with Highest Annual Mean Mean (F)'

Location d Range c Pathway D-51 7.57 (2/2)

(6.90-8.24) 50-331 January-December, 2020 Control Number Locations Non-Mean (F) c Routine Range c Results*

<LLD 0

7.38 (2/2) 0 (7.16-7.60)

<LLD 0

<LLD

{)

<LLD 0

<LLD

{)

<LLD 0

Table 5.7 Radiological Environmental Monitoring Program Summary.

Name of Facility Location of Facility Sample Type and Type Number of (Units)

Analyses' Ground Water, 1-131 53 potable (pCi/L)

H-3 53 GS 53 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 Milk 1-131 18 (pCi/L)

GS 18 K-40 Cs-134 Cs-137 Ba-140 La-140 Broadleaf GS 12 Vegetation K-40 (pCi/gwet)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 1-131 Cs-134 Cs-137 Ce-141 Ce-144 Duane Arnold Energy Center Linn, Iowa Indicator Locations LLD b Mean (F) c Range c Waterborne 0.5

<LLD 161

<LLD 5.6

<LLD 11.9

<LLD 6.3

<LLD 4.5

<LLD 16.6

<LLD 9.3

<LLD 9.4

<LLD 9.3

<LLD 6.4

<LLD 5.3

<LLD 30.5

<LLD 6.6

<LLD Docket No.

Reporting Period Location with Highest Annual Mean Location d Mean (F) c Range c Pathway Ingestion Pathway 0.4

<LLD 100 1434 (11/11)

D-138 1462 (7!7)

(1322-1527)

(1346-1575) 5

<LLD 5

<LLD 60

<LLD 5

<LLD 0.05 4.07(11/11)

D-57 4.93 (111)

(2.08-5.43) 0.032

<LLD 0.074

<LLD 0.034

<LLD 0.035

<LLD 0.069

<LLD 0.036

<LLD 0.046

<LLD 0.031

<LLD 0.284

<LLD 0.059

<LLD 0.031

<LLD 0.046

<LLD 0.184

<LLD 23 50-331 January-December, 2020 Control Number Locations Non-Mean (F) c Routine Range c Results*

0

<LLD

<LLD 0

1462 (7!7) 0 (1346-1575)

<LLD 0

3.45 (111) 0 0

0 0

0

Table 5.7 Radiological Environmental Monitoring Program Summary.

Duane Arnold Energy Center 50-331 Name of Facility Location of Facility Linn, Iowa Docket No.

Reporting Period January-December, 2020 (County, State)

Type and Indicator Location with Highest Annual Mean Control Sample Locations Locations Type Number of LLD b Mean (F) 0 Mean (F) 0 (Units)

Analyses a Location d Mean (F) 0 Range 0

Range 0

Ingestion Pathway (cont.)

GS 9

Vegetation K-40 (Grain and Forage) 0.05 10.72 (7/7)

D-96 12.83 (2/2) 7.17 (2/2)

(pCi/gwet)

(2.61-21.02)

(8.80-16.86)

(2.89-11.45)

Mn-54 0.028

<LLD Fe-59 0.112

<LLD Co-58 0.028

<LLD Co-60 0.050

<LLD Zn-65 0.113

<LLD Nb-95 0.037

<LLD Zr-95 0.048

<LLD Ru-103 0.027

<LLD Ru-106 0.330

<LLD 1-131 0.059

<LLD Cs-134 0.045

<LLD Cs-137 0.034

<LLD Ce-141 0.067

<LLD Ce-144 0.282

<LLD Fish GS 10 (pCi/gwet)

K-40 1.0 3.63 (5/5)

D-49 3.63 (5/5) 3.46 (5/5)

(2.97-4.22)

(2.82-4.14)

Mn-54 0.026

<LLD

<LLD Fe-59 0.0821

<LLD

<LLD Co-58 0.045

<LLD

<LLD Co-60 0.019

<LLD

<LLD Zn-65 0.038

<LLD

<LLD Nb-95 0.069

<LLD

<LLD Zr-95 0.086

<LLD

<LLD Ru-103 0.048

<LLD

<LLD Ru-106 0.201

<LLD

<LLD Cs-134 0.024

<LLD

<LLD Cs-137 0.022

<LLD

<LLD Ce-141 0.121

<LLD

<LLD 0.173

<LLD

<LLD Ce-144 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.

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

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

0 Non-routine results are those which exceed ten times the control station value for the location. If a control station value is not available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

24 Number Non-Routine Results*

0 0

Figure 5.1 Radiological Environmental Monitoring Program Sampling Stations near the Duane Arnold Energy Center.

~

I Figure 5-1 Environmental Monitoring Programs Sampling Near the Duane Arnold Energy Center r----*91 *15 I

32 I

I I

31 I

I I

I 30 I

I I

2!l I

I I

28 I

I ~ I 1..-----

Bil GATE 20ooroot

~I 1117 t+ta IU DAEC

~*

111 f~

141 See Table 5.3 for sampling locations and Table 5.4 for Type and Frequency of collection.

25

~

N

Figure 5.2. Radiological Environmental Monitoring Program Sampling Stations Outside 0.5 Miles.

Figure 5-2 Radiological Environmental Monitoring Program Sampling Stations Outside 0.5 Miles from DAEC CEDAR CEfllTER POINT RIVER

/ ~

aos

~.__}

~OMLc_ty\\DtU:S 11Q ATKINS

10 1)4 00 40 109 050 PALO~

34 3S

e Hi CEDAR R.A!=iDS See Table 5.3 for sampling locations and Table 5.4 for Type and Frequency of collection.

26

6.0 REFERENCES

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

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

Environmental, Inc., Midwest Laboratory.

____ 2015 Study Plan, SP-DAEC-8001, rev1s1on 24 February 12, 2015, The Operational Radiological Environmental Monitoring Program for the Duane Arnold Energy Center, Cedar Rapids, Iowa

____ 2001 through 2019. Environmental Radiological Monitoring Program for the Duane Arnold Energy Center, Annual Report - Part II, Data Tabulations and Analyses, January-December, 2001 - 2019.

____ 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.

____ 2018.

Quality Manual, Rev. 6, 20 June 2018.

____ 2012.

Quality Assurance Program Manual, Rev. 3, 14 November 2012.

____.2020.

Quality Control Procedures Manual, Rev. 4, 15 January 2020.

____ 2009.

Quality Control Program, Rev. 2, 12 November2009.

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 1 OCFR 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.

27

All Environmental, Inc.

I""\\. I Midwest Laboratory 70-0 L:u1d.\\1<b1 R.;.i.J

N u llh~1...,.;.l.,

l l &00£:2 -13 10 phone 1sn11 6-1-0700 * '" (B17j l6H517 Reviewed and Approved DUANE ARNOLD ENERGY CENTER CEDAR RAPIDS, IOWA Docket No. 50-331 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGR1\\M (REMP)

ANNUAL REPORT - PART II DATA TABULATIONS AND ANALYSES January 1 to December 31, 2020 Prepared by ATI ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8001 Ashok Banavali, Ph.D.

Laboratory Manager

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

1.0 INTRODUCTION

......................................................................................................... iv 2.0 PROGRAM DEVIATIONS............................................................................................. v 3.0 DATA TABLES............................................................................................................ vii ii

LIST OF TABLES No.

Airborne particulates and iodine, Location D-3, analyses for gross beta and iodine-131............ 1-1 2

Airborne particulates and iodine, Location D-4, analyses for gross beta and iodine-131............ 2-1 3

Airborne particulates and iodine, Location D-5A, analyses for gross beta and iodine-131.......... 3-1 4

Airborne particulates and iodine, Location D-6, analyses for gross beta and iodine-131............4-1 5

Airborne particulates and iodine, Location D-7, analyses for gross beta and iodine-131............ 5-1 6

Airborne particulates and iodine, Location D-11, analyses for gross beta and iodine-131.......... 6-1 7

Airborne particulates and iodine, Location D-13, analyses for gross beta and iodine-131.......... 7-1 8

Airborne particulates and iodine, Location D-15, analyses for gross beta and iodine-131........... 8-1 9

Airborne particulates and iodine, Location D-16, analyses for gross beta and iodine-131........... 9-1 10 Airborne particulates and iodine, Location D-40, analyses for gross beta and iodine-131......... 10-1 11 Airborne Particulate samples, quarterly composites of weekly samples, analyses for gamma emitting isotopes............................................................................. 11-1 12 Ambient gamma radiation by thermoluminescent dosimeters (TLD), quarterly exposure........... 12-1 13 Milk samples, analysis for iodine-131 and gamma emitting isotopes........................................... 13-1 14 Groundwater samples, analysis for iodine-131, tritium and gamma-emitting isotopes............... 14-1 15 Vegetation samples (broadleaf), analysis for iodine-131 and gamma-emitting isotopes.............................................................................................. 15-1 16 Vegetation samples (hay and grain), analysis for iodine-131 and gamma-emitting isotopes............................................................................................ 16-1 17 Surface water samples, analysis for iodine-131, tritium and gamma emitting isotopes............. 17-1 18 Surface water samples, quarterly composites of monthly samples, analysis for strontium......... 18-1 19 Fish samples, analysis for gamma emitting isotopes................................................................ 19-1 20 River sediment samples, analysis for gamma-emitting isotopes.......................................... 20-1 21 Soil samples, analysis for tritium, strontium-90 and gamma emitting isotopes.......................... 21-1 22 Groundwater Protection Program................................................................................... 22-1 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 2020. 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 Ml D-76 01-09-20 Goat's milk unavailable due to limited herd production.

AP/Al D-16 02-07-20 Sample damaged; appears very light.

Samples discarded.

Ml D-76 02-11-20 Goat's milk unavailable due to limited herd production.

AP/Al D-04 02-21-20 Sample damaged; appears very light.

Samples discarded.

SW D-99 02-25-20 No sample; river frozen.

Ml D-76 03-11-20 Goat's milk unavailable due to limited herd Production.

Ml D-76 04-14-20 Goat's milk unavailable due to limited herd production.

Ml D-76 05-12-20 Goat's milk unavailable due to limited herd production.

TLD D-91 2nct Qtr '20 TLD lost in field.

Ml D-76 06-16-20 Goat's milk unavailable due to limited herd production.

Ml D-76 07-14-20 Goat's milk unavailable due to limited herd production.

Ml D-76 08-11-20 Location inaccessible due to extreme damage after severe winds in area.

Ml D-138 08-11-20 Location inaccessible due to system structural damage.

WW D-52 08-17-20 Sample not collected due to structural damage.

SW D-51 08-19-20 Sample not collected due to fallen trees blocking access to area.

SW D-61 08-19-20 Sample not collected due to fallen trees blocking access to area.

SW D-99 08-19-20 Sample not collected due to fallen trees blocking access to area.

AP/Al D-15 08-21-20 No power at station due to severe damage in the area. Samples not collected.

v

2.0 PROGRAM DEVIATIONS (continued).

Sample Collection Date Type Analysis Location(s) or Period Comments TLD D-05 3rd Qtr '20 TLD lost in field due to severe wind storms in the area.

TLD D-18 3rd Qtr '20 TLD lost in field due to severe wind storms in the area.

TLD D-28 3rd Qtr '20 TLD lost in field due to severe wind storms in the area.

TLD D-39 3rd Qtr '20 TLD lost in field due to severe wind storms in the area.

TLD D-42 3rd Qtr '20 TLD lost in field due to severe wind storms in the area.

TLD D-82 3rd Qtr '20 TLD found broken, declared lost in field due to severe wind storms in the area.

Ml D-76 09-15-20 Goat's milk unavailable due to limited herd production.

Ml D-138 09-15-20 Sample location no longer viable due to derecho storm damage on 08/10/20.

SW D-51 10-08-20 Sample not collected due to fallen trees in area.

Ml D-76 10-15-20 Goat's milk unavailable due to limited herd production.

Ml D-138 10-15-20 Sample location no longer viable due to derecho storm damage on 08/10/20.

Ml D-76 11-17-20 Goat's milk unavailable due to limited herd production.

Sample location no longer viable for milk Ml D-138 11-17-20 collection due to derecho storm damage on 08/10/20.

Ml D-76 12-15-20 Goat's milk unavailable due to limited herd production.

Ml D-110 12-15-20 Sample not available.

Sample location no longer viable for milk Ml D-138 12-15-20 collection due to derecho storm damage on 08/10/20.

vi

3.0 DATA TABLES vii

Table 1. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131 8

Location: D-3 (Hiawatha)

Units: pCi/m 3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m~)

Gross Beta Collected (m~)

Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-20 278 0.017 +/- 0.004 07-10-20 334 0.033 +/- 0.004 01-16-20 240 0.031 +/- 0.005 07-17-20 295 0.023 +/- 0.003 01-22-20 241 0.043 +/- 0.005 07-24-20 294 0.018 +/- 0.003 01-30-20 319 0.024 +/- 0.003 07-31-20 294 0.022 +/- 0.003 02-07-20 320 0.011 +/- 0.003 08-07-20 299 0.017 +/- 0.003 02-15-20 322 0.029 +/- 0.004 08-10-20 121 0.039 +/- 0.008 b

02-21-20 237 0.031 +/- 0.004 08-21-20 102 0.019 +/- 0.007 b

02-28-20 295 0.026 +/- 0.004 08-27-20 232 0.053 +/- 0.005 03-06-20 293 0.019 +/- 0.003 09-04-20 310 0.026 +/- 0.003 03-12-20 254 0.026 +/- 0.004 09-11-20 266 0.016 +/- 0.003 03-21-20 373 0.022 +/- 0.003 09-18-20 272 0.027 +/- 0.004 03-27-20 254 0.021 +/- 0.004 09-25-20 271 0.035 +/- 0.004 04-03-20 293 0.016 +/- 0.003 10-02-20 272 0.018 +/- 0.004 1st Quarter Mean +/- s.d.

0.024 +/- 0.008 3rd Quarter Mean+/- s.d.

0.027 +/- 0.011 04-10-20 293 0.022 +/- 0.004 10-09-20 270 0.028 +/- 0.004 04-17-20 294 0.026 +/- 0.004 10-16-20 271 0.033 +/- 0.004 04-24-20 294 0.023 +/- 0.004 10-23-20 272 0.023 +/- 0.004 04-30-20 252 0.020 +/- 0.004 10-30-20 272 0.037 +/- 0.004 05-07-20 294 0.013 +/- 0.003 11-06-20 272 0.049 +/- 0.005 05-15-20 336 0.013 +/- 0.003 11-13-20 272 0.030 +/- 0.004 05-22-20 295 0.010 +/- 0.003 11-20-20 271 0.037 +/- 0.004 05-29-20 293 0.017 +/- 0.003 11-25-20 195 0.040 +/- 0.006 12-03-20 311 0.038 +/- 0.004 06-04-20 252 0.016 +/- 0.004 06-12-20 336 0.018 +/- 0.003 12-10-20 269 0.045 +/- 0.005 06-19-20 302 0.022 +/- 0.004 12-17-20 271 0.029 +/- 0.004 06-26-20 286 0.015 +/- 0.003 12-23-20 232 0.053 +/- 0.006 07-02-20 254 0.016 +/- 0.004 12-31-20 310 0.037 +/- 0.004 2nd Quarter Mean +/- s.d.

0.018 +/- 0.005 4th Quarter Mean +/- s.d.

0.037 +/- 0.009 Cumulative Average 0.026 a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Low volume due to power outages caused by heavy winds in the area.

1-1

Table 2. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131 8

Location: D-4 (NW Sector)

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

Date Volume Date Volume Collected (m0)

Gross Beta Collected (m0)

Required LLD 0.010 Required LLD 01-10-20 269 0.013 +/- 0.004 07-10-20 322 01-16-20 233 0.030 +/- 0.005 07-17-20 282 01-22-20 233 0.040 +/- 0.005 07-24-20 282 01-30-20 310 0.023 +/- 0.003 07-31-20 282 02-07-20 310 0.009 +/- 0.003 08-07-20 278 02-15-20 312 0.023 +/- 0.003 08-10-20 126 02-21-20 230 NSb 08-21-20 154 02-28-20 272 0.021 +/- 0.004 08-27-20 228 03-06-20 271 0.017 +/- 0.003 09-04-20 324 03-12-20 234 0.026 +/- 0.004 09-11-20 282 03-21-20 336 0.021 +/- 0.003 09-18-20 284 03-27-20 234 0.018 +/- 0.004 09-25-20 282 04-03-20 270 0.017 +/- 0.003 10-02-20 283 1st Quarter Mean+/- s.d.

0.022 +/- 0.008 3rd Quarter Mean+/- s.d.

04-10-20 271 0.022 +/- 0.004 10-09-20 281 04-17-20 271 0.024 +/- 0.004 10-16-20 283 04-24-20 271 0.020 +/- 0.004 10-23-20 283 04-30-20 233 0.024 +/- 0.004 10-30-20 283 05-07-20 271 0.013 +/- 0.003 11-06-20 284 05-15-20 310 0.015 +/- 0.003 11-13-20 283 05-22-20 272 0.012 +/- 0.003 11-20-20 283 05-29-20 270 0.016 +/- 0.003 11-25-20 203 12-03-20 320 06-04-20 233 0.018 +/- 0.004 06-12-20 310 0.024 +/- 0.003 12-10-20 278 06-19-20 276 0.030 +/- 0.004 12-17-20 279 06-26-20 278 0.018 +/- 0.003 12-23-20 240 07-02-20 243 0.019 +/- 0.004 12-31-20 320 2nd Quarter Mean +/- s.d.

0.020 +/- 0.005 4th Quarter Mean +/- s.d.

Cumulative Average a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Sample damaged, discarded per station request.

c Low volume due to power outages caused by heavy winds in the area.

2-1 Gross Beta 0.010 0.035 +/- 0.004 0.026 +/- 0.004 0.024 +/- 0.004 0.021 +/- 0.003 0.015 +/- 0.003 0.032 +/- 0.007 0.016 +/- 0.005 0.052 +/- 0.005 0.028 +/- 0.003 0.014 +/- 0.003 0.023 +/- 0.004 0.031 +/- 0.004 0.014 +/- 0.003 0.025 +/- 0.011 0.021 +/- 0.004 0.028 +/- 0.004 0.020 +/- 0.003 0.031 +/- 0.004 0.049 +/- 0.005 0.033 +/- 0.004 0.037 +/- 0.004 0.044 +/- 0.006 0.037 +/- 0.004 0.054 +/- 0.005 0.036 +/- 0.004 0.055 +/- 0.005 0.038 +/- 0.004 0.037 +/- 0.011 0.026

Table 3. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131 a.

Location: D-5A (Palo)

Units: pCi/m 3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m~)

Gross Beta Collected (m~)

Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-20 281 0.018 +/- 0.004 07-10-20 338 0.036 +/- 0.004 01-16-20 243 0.036 +/- 0.005 07-17-20 298 0.023 +/- 0.003 01-22-20 243 0.051 +/- 0.005 07-24-20 296 0.023 +/- 0.004 01-30-20 323 0.023 +/- 0.003 07-31-20 296 0.020 +/- 0.003 02-07-20 323 0.012 +/- 0.003 08-07-20 302 0.017 +/- 0.003 02-15-20 326 0.028 +/- 0.004 08-10-20 133 0.032 +/- 0.007 b

02-21-20 240 0.030 +/- 0.004 08-21-20 273 0.025 +/- 0.004 02-28-20 283 0.027 +/- 0.004 08-27-20 254 0.050 +/- 0.005 03-06-20 282 0.018 +/- 0.003 09-04-20 336 0.023 +/- 0.003 03-12-20 240 0.028 +/- 0.004 09-11-20 276 0.013 +/- 0.003 03-21-20 381 0.022 +/- 0.003 09-18-20 278 0.026 +/- 0.004 03-27-20 257 0.019 +/- 0.004 09-25-20 276 0.031 +/- 0.004 04-03-20 295 0.017 +/- 0.003 10-02-20 277 0.020 +/- 0.004 1st Quarter Mean+/- s.d.

0.025 +/- 0.010 3rd Quarter Mean+/- s.d.

0.026 +/- 0.009 04-10-20 296 0.025 +/- 0.004 10-09-20 276 0.029 +/- 0.004 04-17-20 297 0.026 +/- 0.004 10-16-20 277 0.031 +/- 0.004 04-24-20 297 0.024 +/- 0.004 10-23-20 277 0.025 +/- 0.004 04-30-20 255 0.019 +/- 0.004 10-30-20 278 0.032 +/- 0.004 05-07-20 297 0.017 +/- 0.003 11-06-20 278 0.049 +/- 0.005 05-15-20 339 0.015 +/- 0.003 11-13-20 276 0.031 +/- 0.004 05-22-20 298 0.012 +/- 0.003 11-20-20 277 0.038 +/- 0.004 05-29-20 296 0.015 +/- 0.003 11-25-20 199 0.042 +/- 0.006 12-03-20 317 0.037 +/- 0.004 06-04-20 255 0.016 +/- 0.004 06-12-20 339 0.019 +/- 0.003 12-10-20 275 0.051 +/- 0.005 06-19-20 300 0.026 +/- 0.004 12-17-20 277 0.034 +/- 0.004 06-26-20 294 0.019 +/- 0.003 12-23-20 237 0.065 +/- 0.006 07-02-20 256 0.019 +/- 0.004 12-31-20 317 0.035 +/- 0.004 2nd Quarter Mean +/- s.d.

0.019 +/- 0.005 4th Quarter Mean+/- s.d.

0.038 +/- 0.011 Cumulative Average 0.027 a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Low volume due to power outages caused by heavy winds in the area.

3-1

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

Location: D-6 (Center Point)

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

Date Volume Date Volume Collected (m0)

Gross Beta Collected (m0)

Required LLD 0.010 Required LLD 01-10-20 275 0.019 +/- 0.004 07-10-20 335 01-16-20 238 0.031 +/- 0.005 07-17-20 284 01-22-20 238 0.041 +/- 0.005 07-24-20 294 01-30-20 316 0.022 +/- 0.003 07-31-20 294 02-07-20 316 0.013 +/- 0.003 08-07-20 294 02-15-20 319 0.032 +/- 0.004 08-12-20 216 02-21-20 235 0.026 +/- 0.004 08-21-20 294 02-28-20 277 0.003 +/- 0.003 b

08-27-20 252 03-06-20 276 0.018 +/- 0.003 09-04-20 337 03-12-20 238 0.027 +/- 0.004 09-11-20 294 03-21-20 355 0.023 +/- 0.003 09-18-20 295 03-27-20 237 0.018 +/- 0.004 09-25-20 294 04-03-20 276 0.016 +/- 0.003 10-02-20 295 1st Quarter Mean +/- s.d.

0.022 +/- 0.010 3rd Quarter Mean +/- s.d.

04-10-20 276 0.022 +/- 0.004 10-09-20 292 04-17-20 277 0.024 +/- 0.004 10-16-20 294 04-24-20 277 0.025 +/- 0.004 10-23-20 294 04-30-20 238 0.022 +/- 0.004 10-30-20 294 05-07-20 277 0.015 +/- 0.003 11-06-20 292 05-15-20 336 0.019 +/- 0.003 11-13-20 292 05-22-20 295 0.013 +/- 0.003 11-20-20 291 05-29-20 293 0.017 +/- 0.003 11-25-20 209 12-03-20 333 06-04-20 252 0.018 +/- 0.004 06-12-20 336 0.021 +/- 0.003 12-10-20 290 06-19-20 300 0.025 +/- 0.004 12-17-20 291 06-26-20 288 0.013 +/- 0.003 12-23-20 249 07-02-20 254 0.015 +/- 0.004 12-31-20 333 2nd Quarter Mean +/- s.d.

0.019 +/- 0.004 4th Quarter Mean +/- s.d.

Cumulative Average "lodine-131 concentrations are< 0.03 pCi/m3 unless noted otherwise.

b Filter appears lighter than usual.

c Lower volume due to power outages caused by heavy winds in the area.

4-1 Gross Beta 0.010 0.021 +/- 0.003 0.019 +/- 0.003 0.018 +/- 0.003 0.017 +/- 0.003 0.014 +/- 0.003 0.027 +/- 0.005 0.020 +/- 0.003 0.036 +/- 0.004 0.022 +/- 0.003 0.011 +/- 0.003 0.021 +/- 0.003 0.032 +/- 0.004 0.015 +/- 0.003 0.021 +/- 0.007 0.023 +/- 0.004 0.025 +/- 0.004 0.022 +/- 0.003 0.028 +/- 0.004 0.005 +/- 0.002 0.031 +/- 0.004 0.036 +/- 0.004 0.045 +/- 0.006 0.041 +/- 0.004 0.051 +/- 0.005 0.034 +/- 0.004 0.057 +/- 0.005 0.036 +/- 0.004 0.033 +/- 0.014 0.024 b

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

Location: D-7 (Shellsburg)

Units: pCi/m 3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (mo)

Gross Beta Collected (mo)

Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-20 289 0.017 +/- 0.004 07-10-20 325 0.038 +/- 0.004 01-16-20 250 0.030 +/- 0.005 07-17-20 286 0.026 +/- 0.004 01-22-20 250 0.006 +/- 0.003 07-24-20 285 0.022 +/- 0.004 01-30-20 332 0.024 +/- 0.003 07-31-20 285 0.024 +/- 0.004 02-07-20 333 0.011 +/- 0.003 08-07-20 290 0.019 +/- 0.003 02-15-20 335 0.027 +/- 0.003 08-10-20 127 0.032 +/- 0.007 02-21-20 247 0.026 +/- 0.004 08-21-20 237 0.029 +/- 0.004 02-28-20 292 0.025 +/- 0.004 08-27-20 245 0.045 +/- 0.005 03-06-20 290 0.016 +/- 0.003 09-04-20 328 0.027 +/- 0.003 03-12-20 250 0.022 +/- 0.004 09-11-20 284 0.016 +/- 0.003 03-21-20 374 0.021 +/- 0.003 09-18-20 287 0.024 +/- 0.004 03-27-20 252 0.020 +/- 0.004 09-25-20 284 0.033 +/- 0.004 04-03-20 290 0.015 +/- 0.003 10-02-20 286 0.001 +/- 0.002 b

1st Quarter Mean +/- s.d.

0.020 +/- 0.007 3rd Quarter Mean +/- s.d.

0.026 +/- 0.011 04-10-20 290 0.020 +/- 0.003 10-09-20 284 0.022 +/- 0.004 04-17-20 292 0.029 +/- 0.004 10-16-20 286 0.030 +/- 0.004 04-24-20 291 0.020 +/- 0.004 10-23-20 286 0.025 +/- 0.004 04-30-20 250 0.022 +/- 0.004 10-30-20 286 0.032 +/- 0.004 05-07-20 291 0.017 +/- 0.003 11-06-20 280 0.048 +/- 0.005 05-15-20 327 0.016 +/- 0.003 11-13-20 280 0.030 +/- 0.004 05-22-20 286 0.014 +/- 0.003 11-20-20 280 0.039 +/- 0.004 05-29-20 285 0.018 +/- 0.003 11-25-20 201 0.050 +/- 0.006 12-03-20 321 0.039 +/- 0.004 06-04-20 245 0.022 +/- 0.004 06-12-20 326 0.022 +/- 0.003 12-10-20 278 0.053 +/- 0.005 06-19-20 289 0.023 +/- 0.004 12-17-20 280 0.032 +/- 0.004 06-26-20 282 0.014 +/- 0.003 12-23-20 240 0.061 +/- 0.006 07-02-20 246 0.025 +/- 0.004 12-31-20 320 0.035 +/- 0.004 2nd Quarter Mean +/- s.d.

0.020 +/- 0.004 4th Quarter Mean +/- s.d.

0.038 +/- 0.012 Cumulative Average 0.026 a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Filter appears lighter than normal.

c Low volume due to power outages caused by heavy winds in the area.

5-1

Table 6. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131 8

Location: D-11 (Toddville)

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

Date Volume Date Volume Collected (m0)

Gross Beta Collected (m0)

Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-20 275 0.016 +/- 0.004 07-10-20 347 0.036 +/- 0.004 01-16-20 238 0.040 +/- 0.005 07-17-20 306 0.025 +/- 0.003 01-22-20 238 0.041 +/- 0.005 07-24-20 305 0.021 +/- 0.004 01-30-20 316 0.023 +/- 0.003 07-31-20 305 0.026 +/- 0.004 02-07-20 316 0.014 +/- 0.003 08-07-20 310 0.018 +/- 0.003 02-15-20 319 0.028 +/- 0.004 08-11-20 199 0.041 +/- 0.005 b

02-21-20 235 0.034 +/- 0.005 08-21-20 306 0.028 +/- 0.004 02-28-20 278 0.025 +/- 0.004 08-27-20 262 0.049 +/- 0.005 03-06-20 276 0.019 +/- 0.003 09-04-20 350 0.029 +/- 0.003 03-12-20 240 0.027 +/- 0.004 09-11-20 305 0.015 +/- 0.003 03-21-20 351 0.022 +/- 0.003 09-18-20 307 0.026 +/- 0.004 03-27-20 239 0.025 +/- 0.004 09-25-20 288 0.023 +/- 0.004 04-03-20 304 0.017 +/- 0.003 10-02-20 289 0.017 +/- 0.003 1st Quarter Mean +/- s.d.

0.026 +/- 0.009 3rd Quarter Mean +/- s.d.

0.027 +/- 0.010 04-10-20 305 0.023 +/- 0.003 10-09-20 287 0.028 +/- 0.004 04-17-20 306 0.025 +/- 0.004 10-16-20 288 0.027 +/- 0.004 04-24-20 305 0.012 +/- 0.003 10-23-20 289 0.024 +/- 0.004 04-30-20 262 0.020 +/- 0.004 10-30-20 290 0.029 +/- 0.004 05-07-20 305 0.016 +/- 0.003 11-06-20 289 0.045 +/- 0.004 05-15-20 349 0.016 +/- 0.003 11-13-20 289 0.028 +/- 0.004 05-22-20 306 0.012 +/- 0.003 11-20-20 288 0.038 +/- 0.004 05-29-20 305 0.016 +/- 0.003 11-25-20 207 0.041 +/- 0.006 12-03-20 331 0.037 +/- 0.004 06-04-20 262 0.020 +/- 0.004 06-12-20 349 0.023 +/- 0.003 12-10-20 286 0.049 +/- 0.005 06-19-20 313 0.025 +/- 0.004 12-17-20 288 0.035 +/- 0.004 06-26-20 298 0.020 +/- 0.003 12-23-20 247 0.053 +/- 0.005 07-02-20 263 0.021 +/- 0.004 12-31-20 330 0.030 +/- 0.004 2nd Quarter Mean +/- s.d.

0.019 +/- 0.004 4th Quarter Mean +/- s.d.

0.036 +/- 0.009 Cumulative Average 0.027 a lodine-131 concentrations are< 0.03 pCi/m3 unless noted otherwise.

b Lower volume due to power outages caused by heavy winds in the area.

6-1

Table 7. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131 8

Location: D-13 (Alburnett)

Units: pCi/m 3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m~)

Gross Beta Collected (m~)

Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-20 267 0.018 +/- 0.004 07-10-20 334 0.031 +/- 0.004 01-16-20 230 0.033 +/- 0.005 07-17-20 294 0.020 +/- 0.003 01-22-20 231 0.049 +/- 0.005 07-24-20 294 0.022 +/- 0.004 01-30-20 307 0.023 +/- 0.003 07-31-20 294 0.018 +/- 0.003 02-07-20 307 0.009 +/- 0.003 08-07-20 299 0.013 +/- 0.003 02-15-20 309 0.023 +/- 0.003 08-10-20 121 0.034 +/- 0.007 02-21-20 228 0.032 +/- 0.005 08-21-20 146 0.019 +/- 0.006 02-28-20 295 0.024 +/- 0.004 08-27-20 232 0.036 +/- 0.005 03-06-20 294 0.020 +/- 0.003 09-04-20 311 0.021 +/- 0.003 03-12-20 253 0.028 +/- 0.004 09-11-20 271 0.013 +/- 0.003 03-21-20 375 0.021 +/- 0.003 09-18-20 272 0.023 +/- 0.004 03-27-20 254 0.025 +/- 0.004 09-25-20 271 0.030 +/- 0.004 04-03-20 293 0.018 +/- 0.003 10-02-20 272 0.017 +/- 0.003 1st Quarter Mean+/- s.d.

0.025 +/- 0.010 3rd Quarter Mean +/- s.d.

0.023 +/- 0.007 04-10-20 293 0.019 +/- 0.003 10-09-20 270 0.029 +/- 0.004 04-17-20 294 0.024 +/- 0.004 10-16-20 271 0.028 +/- 0.004 04-24-20 294 0.021 +/- 0.004 10-23-20 272 0.024 +/- 0.004 04-30-20 252 0.021 +/- 0.004 10-30-20 272 0.032 +/- 0.004 05-07-20 294 0.013 +/- 0.003 11-06-20 272 0.037 +/- 0.004 05-15-20 336 0.018 +/- 0.003 11-13-20 272 0.020 +/- 0.004 05-22-20 295 0.014 +/- 0.003 11-20-20 271 0.040 +/- 0.004 05-29-20 293 0.016 +/- 0.003 11-25-20 195 0.048 +/- 0.006 12-03-20 310 0.041 +/- 0.004 06-04-20 252 0.017 +/- 0.004 06-12-20 336 0.020 +/- 0.003 12-10-20 270 0.064 +/- 0.005 06-19-20 301 0.017 +/- 0.003 12-17-20 271 0.041 +/- 0.004 06-26-20 287 0.016 +/- 0.003 12-23-20 232 0.071 +/- 0.006 07-02-20 254 0.021 +/- 0.004 12-31-20 311 0.041 +/- 0.004 2nd Quarter Mean +/- s.d.

0.018 +/- 0.003 4th Quarter Mean +/- s.d.

0.040 +/- 0.015 Cumulative Average 0.026 a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Low volume due to power outages caused by heavy winds in the area.

7-1

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

Location: D-15 (On-site, north)

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

Date Volume Date Volume Collected (m0)

Gross Beta Collected (m0)

Required LLD 0.010 Required LLD 01-10-20 303 0.017 +/- 0.004 07-10-20 319 01-16-20 262 0.036 +/- 0.005 07-17-20 279 01-22-20 263 0.056 +/- 0.005 07-24-20 279 01-30-20 349 0.025 +/- 0.003 07-31-20 280 02-07-20 349 0.018 +/- 0.003 08-07-20 275 02-15-20 352 0.004 +/- 0.002 b

08-10-20 125 02-21-20 259 0.027 +/- 0.004 08-21-20 02-28-20 306 0.024 +/- 0.004 08-27-20 220 03-06-20 305 0.019 +/- 0.003 09-04-20 320 03-12-20 271 0.027 +/- 0.004 09-11-20 285 03-21-20 349 0.024 +/- 0.003 09-18-20 286 03-27-20 242 0.019 +/- 0.004 09-25-20 285 04-03-20 278 0.017 +/- 0.003 10-02-20 286 1st Quarter Mean+/- s.d.

0.024 +/- 0.012 3rd Quarter Mean +/- s.d.

04-10-20 279 0.024 +/- 0.004 10-09-20 284 04-17-20 280 0.029 +/- 0.004 10-16-20 286 04-24-20 280 0.022 +/- 0.004 10-23-20 286 04-30-20 240 0.023 +/- 0.004 10-30-20 286 05-07-20 279 0.017 +/- 0.003 11-06-20 286 05-15-20 320 0.015 +/- 0.003 11-13-20 286 05-22-20 280 0.010 +/- 0.003 11-20-20 285 05-29-20 279 0.013 +/- 0.003 11-25-20 205 12-03-20 327 06-04-20 240 0.019 +/- 0.004 06-12-20 320 0.018 +/- 0.003 12-10-20 284 06-19-20 291 0.025 +/- 0.004 12-17-20 285 06-26-20 269 0.014 +/- 0.003 12-23-20 245 07-02-20 241 0.021 +/- 0.004 12-31-20 327 2nd Quarter Mean +/- s.d.

0.019 +/- 0.005 4th Quarter Mean +/- s.d.

Cumulative Average a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Filter appears lighter than usual.

c "NS" - no power at the station due to heavy winds in the area. Samples not collected.

8-1 Gross Beta 0.010 0.033 +/- 0.004 0.022 +/- 0.004 0.022 +/- 0.004 0.022 +/- 0.004 0.016 +/- 0.003 0.034 +/- 0.007 NSC 0.042 +/- 0.005 0.024 +/- 0.003 0.018 +/- 0.003 0.026 +/- 0.004 0.031 +/- 0.004 0.021 +/- 0.004 0.025 +/- 0.008 0.026 +/- 0.004 0.030 +/- 0.004 0.028 +/- 0.004 0.031 +/- 0.004 0.052 +/- 0.005 0.031 +/- 0.004 0.033 +/- 0.004 0.044 +/- 0.006 0.038 +/- 0.004 0.051 +/- 0.005 0.036 +/- 0.004 0.060 +/- 0.006 0.037 +/- 0.004 0.038 +/- 0.010 0.027

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

Location: D-16 (On-site)

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

Date Volume Date Volume Collected (mJ)

Gross Beta Collected (mJ)

Required LLD 0.010 Required LLD 01-10-20 281 0.019 +/- 0.004 07-10-20 316 01-16-20 242 0.030 +/- 0.005 07-17-20 277 01-22-20 243 0.046 +/- 0.005 07-24-20 277 01-30-20 323 0.025 +/- 0.003 07-31-20 277 02-07-20 323 NSb 08-07-20 277 02-15-20 326 0.030 +/- 0.004 08-14-20 277 02-21-20 240 0.034 +/- 0.005 08-21-20 277 02-28-20 283 0.024 +/- 0.004 08-27-20 238 03-06-20 282 0.021 +/- 0.003 09-04-20 316 03-12-20 251 0.028 +/- 0.004 09-11-20 277 03-21-20 352 0.022 +/- 0.003 09-18-20 278 03-27-20 244 0.021 +/- 0.004 09-25-20 277 04-03-20 281 0.014 +/- 0.003 10-02-20 278 1st Quarter Mean+/- s.d.

0.026 +/- 0.008 3rd Quarter Mean +/- s.d.

04-10-20 282 0.021 +/- 0.004 10-09-20 275 04-17-20 283 0.026 +/- 0.004 10-16-20 277 04-24-20 283 0.024 +/- 0.004 10-23-20 277 04-30-20 242 0.023 +/- 0.004 10-30-20 277 05-07-20 282 0.016 +/- 0.003 11-06-20 278 05-15-20 323 0.017 +/- 0.003 11-13-20 278 05-22-20 283 0.012 +/- 0.003 11-20-20 277 05-29-20 282 0.016 +/- 0.003 11-25-20 199 12-03-20 346 06-04-20 243 0.018 +/- 0.004 06-12-20 323 0.022 +/- 0.003 12-10-20 301 06-19-20 294 0.024 +/- 0.004 12-17-20 302 06-26-20 266 0.019 +/- 0.004 12-23-20 259 07-02-20 238 0.022 +/- 0.004 12-31-20 346 2nd Quarter Mean +/- s.d.

0.020 +/- 0.004 4th Quarter Mean +/- s.d.

Cumulative Average a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Sample damaged, discarded per station request.

9-1 Gross Beta 0.010 0.036 +/- 0.004 0.024 +/- 0.004 0.025 +/- 0.004 0.031 +/- 0.004 0.018 +/- 0.003 0.032 +/- 0.004 0.029 +/- 0.004 0.048 +/- 0.005 0.026 +/- 0.003 0.018 +/- 0.003 0.024 +/- 0.004 0.038 +/- 0.004 0.022 +/- 0.004 0.029 +/- 0.009 0.023 +/- 0.004 0.029 +/- 0.004 0.022 +/- 0.004 0.031 +/- 0.004 0.049 +/- 0.005 0.030 +/- 0.004 0.037 +/- 0.004 0.041 +/- 0.006 0.037 +/- 0.004 0.046 +/- 0.004 0.034 +/- 0.004 0.054 +/- 0.005 0.032 +/- 0.003 0.036 +/- 0.010 0.028

Table 10. Airborne particulates and charcoal canisters, analyses for gross beta and iodine-131 a.

Location: D-40 (Wickiup Hill)

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

Date Volume Date Volume Collected (mj)

Gross Beta Collected (mj)

Gross Beta Required LLD 0.010 Required LLD 0.010 01-10-20 267 0.021 +/- 0.004 07-10-20 299 0.036 +/- 0.004 01-16-20 230 0.041 +/- 0.005 07-17-20 263 0.025 +/- 0.004 01-22-20 231 0.047 +/- 0.005 07-24-20 262 0.023 +/- 0.004 01-30-20 307 0.024 +/- 0.004 07-31-20 262 0.022 +/- 0.004 02-07-20 306 0.013 +/- 0.003 08-07-20 267 0.017 +/- 0.003 02-15-20 309 0.031 +/- 0.004 08-10-20 117 0.029 +/- 0.007 02-21-20 228 0.032 +/- 0.005 08-21-20 242 0.025 +/- 0.004 02-28-20 269 0.033 +/- 0.004 08-27-20 225 0.046 +/- 0.005 03-06-20 268 0.020 +/- 0.004 09-04-20 301 0.021 +/- 0.003 03-12-20 234 0.028 +/- 0.004 09-11-20 262 0.010 +/- 0.003 03-21-20 339 0.023 +/- 0.003 09-18-20 264 0.019 +/- 0.004 03-27-20 232 0.023 +/- 0.004 09-25-20 292 0.028 +/- 0.004 04-03-20 261 0.016 +/- 0.003 10-02-20 295 0.019 +/- 0.003 1st Quarter Mean+/- s.d.

0.027 +/- 0.010 3rd Quarter Mean +/- s.d.

0.025 +/- 0.009 04-10-20 262 0.025 +/- 0.004 10-09-20 292 0.021 +/- 0.004 04-17-20 263 0.028 +/- 0.004 10-16-20 294 0.019 +/- 0.003 04-24-20 263 0.021 +/- 0.004 10-23-20 294 0.023 +/- 0.003 04-30-20 225 0.023 +/- 0.004 10-30-20 294 0.026 +/- 0.004 05-07-20 262 0.016 +/- 0.003 11-06-20 290 0.041 +/- 0.004 05-15-20 300 0.016 +/- 0.003 11-13-20 287 0.030 +/- 0.004 05-22-20 263 0.013 +/- 0.004 11-20-20 294 0.035 +/- 0.004 05-29-20 262 0.016 +/- 0.004 11-25-20 211 0.039 +/- 0.005 12-03-20 337 0.027 +/- 0.004 06-04-20 225 0.015 +/- 0.004 06-12-20 300 0.019 +/- 0.003 12-10-20 292 0.027 +/- 0.004 06-19-20 270 0.025 +/- 0.004 12-17-20 290 0.032 +/- 0.004 06-26-20 255 0.017 +/- 0.004 12-23-20 252 0.059 +/- 0.005 07-02-20 227 0.031 +/- 0.005 12-31-20 337 0.034 +/- 0.004 2nd Quarter Mean +/- s.d.

0.020 +/- 0.006 4th Quarter Mean +/- s.d.

0.032 +/- 0.010 Cumulative Average 0.026 a lodine-131 concentrations are< 0.03 pCi/m 3 unless noted otherwise.

b Low volume due to power outages caused by heavy winds in the area.

10-1

Table 11.

Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m" Location 0-3 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code OAP-1101 OAP-2405 OAP-3955 OAP-4913 Volume (m")

3719 3782 3362 3488 Be-7 0.064 +/- 0.014 0.090 +/- 0.014 0.111 +/- 0.019 0.059 +/- 0.013 Mn-54

< 0.0007

< 0.0008

< 0.0009

< 0.0007 Fe-59

< 0.0019

< 0.0010

< 0.0021

< 0.0017 Co-58

< 0.0006

< 0.0008

< 0.0008 Co-60

< 0.0009

< 0.0007

< 0.0011

< 0.0003 Zn-65

< 0.0009

< 0.0005

< 0.0008

< 0.0010 Nb-95

< 0.0009

< 0.0004

< 0.0009

< 0.0009 Zr-95

< 0.0015

< 0.0013

< 0.0019 Ru-103

< 0.0011

< 0.0008

< 0.0015

< 0.0012 Ru-106

< 0.0053

< 0.0064

< 0.0056 Cs-134

< 0.0009

< 0.0016

< 0.0009 Cs-137

< 0.0003

< 0.0006

< 0.0011

< 0.0007 Ce-141

< 0.0010

< 0.0013

< 0.0018

< 0.0018 Ce-144

< 0.0052

< 0.0045

< 0.0053

< 0.0034 Location 0-4 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code OAP-1102 OAP-2406 OAP-3956 OAP-4914 Volume (m")

3514 3509 3409 3620 Be-7 0.058 +/- 0.012 0.108 +/- 0.025 0.104 +/- 0.017 0.058 +/- 0.014 Mn-54

< 0.0010

< 0.0008

< 0.0004 Fe-59

< 0.0011

< 0.0034

< 0.0020

< 0.0011 Co-58

< 0.0007

< 0.0006

< 0.0007

< 0.0007 Co-60

< 0.0006

< 0.0015

< 0.0008

< 0.0006 Zn-65

< 0.0015

< 0.0055

< 0.0008

< 0.0007 Nb-95

< 0.0009

< 0.0010

< 0.0012

< 0.0011 Zr-95

< 0.0011

< 0.0027

< 0.0015

< 0.0012 Ru-103

< 0.0011

< 0.0010

< 0.0012

< 0.0010 Ru-106

< 0.0080

< 0.0070

< 0.0054

< 0.0052 Cs-134

< 0.0008

< 0.0016

< 0.0011

< 0.0009 Cs-137

< 0.0006

< 0.0012

< 0.0007

< 0.0003 Ce-141

< 0.0013

< 0.0014

< 0.0015

< 0.0014 Ce-144

< 0.0029

< 0.0046

< 0.0043

< 0.0044 Location 0-5A Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code OAP-1103 OAP-2407 OAP-3957 OAP-4915 Volume (m")

3716 3819 3633 3560 Be-7 0.069 +/- 0.018 0.091 +/- 0.016 0.114 +/- 0.021 0.073 +/- 0.017 Mn-54

< 0.0008

< 0.0010

< 0.0013

< 0.0007 Fe-59

< 0.0019

< 0.0025

< 0.0013

< 0.0009 Co-58

< 0.0007

< 0.0012

< 0.0005

< 0.0006 Co-60

< 0.0008

< 0.0007

< 0.0006 Zn-65

< 0.0024

< 0.0020

< 0.0011

< 0.0011 Nb-95

< 0.0012

< 0.0010

< 0.0006

< 0.0014 Zr-95

< 0.0013

< 0.0011

< 0.0008

< 0.0014 Ru-103

< 0.0012

< 0.0014

< 0.0010

< 0.0013 Ru-106

< 0.0103

< 0.0100

< 0.0076

< 0.0071 Cs-134

< 0.0011

< 0.0010

< 0.0009 Cs-137

< 0.0010

< 0.0007

< 0.0005

< 0.0005 Ce-141

< 0.0013

< 0.0016

< 0.0019

< 0.0016 Ce-144

< 0.0057

< 0.0067

< 0.0057

< 0.0035 11-1

Table 11.

Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m, Location D-6 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1104 DAP-2408 DAP-3958 DAP-4916 Volume (m,)

3597 3699 3776 3756 Be-7 0.059 +/- 0.014 0.085 +/- 0.014 0.083 +/- 0.015 0.073 +/- 0.017 Mn-54

< 0.0007

< 0.0008

< 0.0007

< 0.0007 Fe-59

< 0.0015

< 0.0012

< 0.0027

< 0.0016 Co-58

< 0.0006

< 0.0005

< 0.0006

< 0.0007 Co-60

< 0.0005

< 0.0006

< 0.0007

< 0.0003 Zn-65

< 0.0016

< 0.0012

< 0.0009

< 0.0015 Nb-95

< 0.0008

< 0.0005

< 0.0006

< 0.0012 Zr-95

< 0.0010

< 0.0012

< 0.0011

< 0.0015 Ru-103

< 0.0010

< 0.0016

< 0.0012 Ru-106

< 0.0058

< 0.0047

< 0.0075

< 0.0033 Cs-134

< 0.0009

< 0.0009 Cs-137

< 0.0005

< 0.0006

< 0.0004

< 0.0005 Ce-141

< 0.0010

< 0.0008

< 0.0016

< 0.0018 Ce-144

< 0.0051

< 0.0031

< 0.0054

< 0.0054 Location D-7 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1105 DAP-2410 DAP-3959 DAP-4917 Volume (m,)

3785 3700 3550 3621 Be-7 0.061 +/- 0.014 0.088 +/- 0.013 0.076 +/- 0.018 0.074 +/- 0.018 Mn-54

< 0.0007

< 0.0005

< 0.0010

< 0.0009 Fe-59

< 0.0021

< 0.0014

< 0.0021

< 0.0009 Co-58

< 0.0006

< 0.0007

< 0.0010

< 0.0009 Co-60

< 0.0005

< 0.0003

< 0.0007

< 0.0007 Zn-65

< 0.0012

< 0.0010

< 0.0013

< 0.0018 Nb-95

< 0.0009

< 0.0015

< 0.0012 Zr-95

< 0.0011

< 0.0008

< 0.0007

< 0.0010 Ru-103

< 0.0009

< 0.0014

< 0.0010 Ru-106

< 0.0056

< 0.0059

< 0.0083

< 0.0065 Cs-134

< 0.0008

< 0.0010

< 0.0011

< 0.0007 Cs-137

< 0.0003

< 0.0005

< 0.0010

< 0.0005 Ce-141

< 0.0011

< 0.0012

< 0.0016

< 0.0013 Ce-144

< 0.0048

< 0.0039

< 0.0048

< 0.0031 Location D-11 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1106 DAP-2411 DAP-3960 DAP-4918 Volume (m3) 3625 3929 3878 3708 Be-7 0.076 +/- 0.016 0.110 +/- 0.021 0.102 +/- 0.018 0.077 +/- 0.014 Mn-54

< 0.0010

< 0.0008

< 0.0005 Fe-59

< 0.0028

< 0.0020

< 0.0011

< 0.0017 Co-58

< 0.0012

< 0.0004

< 0.0011

< 0.0008 Co-60

< 0.0012

< 0.0010

< 0.0005 Zn-65

< 0.0033

< 0.0020

< 0.0007

< 0.0015 Nb-95

< 0.0011

< 0.0012

< 0.0009

< 0.0013 Zr-95

< 0.0022

< 0.0015

< 0.0010

< 0.0011 Ru-103

< 0.0016

< 0.0010

< 0.0011

< 0.0012 Ru-106

< 0.0097

< 0.0055

< 0.0072

< 0.0056 Cs-134

< 0.0015

< 0.0012

< 0.0011

< 0.0008 Cs-137

< 0.0013

< 0.0006

< 0.0005

< 0.0007 Ce-141

< 0.0018

< 0.0017

< 0.0019

< 0.0014 Ce-144

< 0.0056

< 0.0040

< 0.0036

< 0.0053 11-2

Table 11.

Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/m 0

Location 0-13 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code OAP-1107 OAP-2412 OAP-3961 OAP-4919 Volume (m 0

)

3640 3783 3410 3488 Be-7 0.069 +/- 0.013 0.088 +/- 0.014 0.100 +/- 0.024 0.065 +/- 0.015 Mn-54

< 0.0006

< 0.0009

< 0.0009 Fe-59

< 0.0006

< 0.0020

< 0.0025

< 0.0014 Co-58

< 0.0004

< 0.0005

< 0.0008

< 0.0003 Co-60

< 0.0004

< 0.0010

< 0.0011

< 0.0007 Zn-65

< 0.0006

< 0.0015

< 0.0019

< 0.0006 Nb-95

< 0.0008

< 0.0007

< 0.0015

< 0.0011 Zr-95

< 0.0011

< 0.0018

< 0.0024

< 0.0021 Ru-103

< 0.0006

< 0.0012

< 0.0015

< 0.0009 Ru-106

< 0.0060

< 0.0070

< 0.0092

< 0.0079 Cs-134

< 0.0008

< 0.0010

< 0.0011

< 0.0009 Cs-137

< 0.0006

< 0.0005

< 0.0006

< 0.0006 Ce-141

< 0.0015

< 0.0018

< 0.0014

< 0.0012 Ce-144

< 0.0044

< 0.0048

< 0.0038

< 0.0034 Location 0-15 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code OAP-1108 OAP-2413 OAP-3962 OAP-4920 Volume (m 0

)

3888 3598 3240 3671 Be-7 0.080 +/- 0.017 0.093 +/- 0.015 0.101 +/- 0.018 0.065 +/- 0.014 Mn-54

< 0.0011

< 0.0007

< 0.0008

< 0.0004 Fe-59

< 0.0021

< 0.0009

< 0.0015

< 0.0007 Co-58

< 0.0007

< 0.0002

< 0.0009

< 0.0009 Co-60

< 0.0008

< 0.0006

< 0.0008

< 0.0003 Zn-65

< 0.0036

< 0.0016

< 0.0012

< 0.0014 Nb-95

< 0.0014

< 0.0007

< 0.0013

< 0.0013 Zr-95

< 0.0015

< 0.0016

< 0.0012

< 0.0008 Ru-103

< 0.0011

< 0.0008

< 0.0009

< 0.0011 Ru-106

< 0.0070

< 0.0045

< 0.0075

< 0.0050 Cs-134

< 0.0013

< 0.0008

< 0.0012

< 0.0009 Cs-137

< 0.0009

< 0.0008

< 0.0009

< 0.0007 Ce-141

< 0.0017

< 0.0010

< 0.0022

< 0.0021 Ce-144

< 0.0054

< 0.0047

< 0.0042

< 0.0047 Location 0-16 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code OAP-1109 OAP-2414 OAP-3963 OAP-4921 Volume (m 0

)

3671 3624 3640 3693 Be-7 0.067 +/- 0.012 0.105 +/- 0.017 0.077 +/- 0.017 0.070 +/- 0.016 Mn-54

< 0.0010

< 0.0009

< 0.0012

< 0.0007 Fe-59

< 0.0015

< 0.0018

< 0.0022

< 0.0008 Co-58

< 0.0005

< 0.0010

< 0.0005

< 0.0007 Co-60

< 0.0007

< 0.0010

< 0.0007

< 0.0007 Zn-65

< 0.0019

< 0.0011

< 0.0013 Nb-95

< 0.0011

< 0.0007

< 0.0013

< 0.0010 Zr-95

< 0.0018

< 0.0019

< 0.0020

< 0.0014 Ru-103

< 0.0010

< 0.0012

< 0.0010

< 0.0011 Ru-106

< 0.0107

< 0.0086

< 0.0066

< 0.0056 Cs-134

< 0.0011

< 0.0010

< 0.0008 Cs-137

< 0.0006

< 0.0008

< 0.0007

< 0.0006 Ce-141

< 0.0012

< 0.0013

< 0.0017

< 0.0010 Ce-144

< 0.0047

< 0.0054

< 0.0041

< 0.0040 11-3

Table 11.

Airborne particulates, analyses for gamma-emitting isotopes.

Collection: Quarterly Composite Units: pCi/mJ Location D-40 Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Lab Code DAP-1110 DAP-2415 DAP-3964 DAP-4922 Volume (mJ) 3480 3378 3351 3766 Be-7 0.072 +/- 0.013 0.104 +/- 0.019 0.072 +/- 0.017 0.056 +/- 0.015 Mn-54

< 0.0006

< 0.0009

< 0.0010

< 0.0005 Fe-59

< 0.0009

< 0.0016

< 0.0018 Co-58

< 0.0003

< 0.0009

< 0.0011

< 0.0009 Co-60

< 0.0005

< 0.0007

< 0.0010

< 0.0003 Zn-65

< 0.0010

< 0.0016

< 0.0006 Nb-95

< 0.0009

< 0.0015

< 0.0016

< 0.0012 Zr-95

< 0.0007

< 0.0023

< 0.0007

< 0.0007 Ru-103

< 0.0007

< 0.0014

< 0.0009 Ru-106

< 0.0061

< 0.0101

< 0.0087

< 0.0022 Cs-134

< 0.0009

< 0.0010

< 0.0011

< 0.0008 Cs-137

< 0.0005

< 0.0008

< 0.0005 Ce-141

< 0.0012

< 0.0020

< 0.0027

< 0.0017 Ce-144

< 0.0039

< 0.0046

< 0.0041

< 0.0047 11-4

Table 12. Ambient gamma radiation as measured by thermoluminescent dosimeters (TLD).

Quarterly collection.

Units: mR/91 days Control Locations 1st Qtr.

2nd Qtr.

3rd Qtr.

4th Qtr.

D-1 21.7+/-1.7 14.2 +/- 2.0 16.1+/-1.6 12.2 +/- 1.2 D-2 19.7 +/- 1.1 12.8+/-1.1 13.6 +/- 1.1 11.9+/-0.5 D-3 20.8 +/- 1.4 14.9+/-1.1 15.9 +/- 0.9 12.1 +/- 0.5 D-4 21.8+/-1.7 17.6+/-1.8 15.0 +/- 1.6 14.2+/-1.2 D-5 23.7+/-1.2 18.0+/-1.0 ND 8

15.5 +/- 0.5 D-5A 21.8 +/- 0.7 14.0+/-1.1 16.6+/-1.0 12.7 +/-0.4 D-6 21.1 +/-0.9 14.8+/-1.2 15.5 +/- 1.0 13.0 +/-0.7 D-7 18.4+/-1.1 15.7+/-1.1 13.4 +/- 1.1 12.5 +/- 0.6 D-8 22.9+/-1.0 17.2+/-1.2 19.4 +/- 1.3 16.2+/-1.1 D-10 22.4+/-1.7 16.5 +/- 2.2 17.8 +/- 1.3 13.8 +/- 0.5 D-11 18.2 +/- 0.8 12.8 +/- 1.2 14.7 +/- 1.0 11.2+/-0.9 D-13 21.3 +/- 0.6 14.2+/-1.7 15.9 +/- 1.0 13.1 +/-0.9 Mean+/- s.d.

21.1+/-1.7 15.2+/-1.8 15.8 +/- 1.7 13.2 +/- 1.5 Within 0.5 mi. of Stack D-15 19.6 +/- 1.2 13.6 +/- 0.9 15.6 +/- 1.2 12.3 +/- 0.4 D-16 23.8 +/- 1.2 17.0+/-1.3 16.1 +/- 1.3 13.1 +/- 0.8 D-17 24.4+/-1.0 22.4+/-1.1 20.1 +/- 1.2 19.3 +/- 0.6 D-18 22.7+/-1.8 15.8+/-1.1 ND 8

14.0 +/- 0.5 D-19 21.5+/-1.4 17.3+/-1.0 16.3+/-1.6 13.0 +/- 0.4 D-20 24.6 +/- 1.2 18.8 +/- 2.0 16.1 +/-1.2 14.2 +/- 1.3 D-21 23.9 +/- 1.1 19.6 +/- 1.7 16.5 +/- 0.9 13.5 +/- 0.8 D-22 22.2+/-1.0 20.0+/-1.2 15.8 +/- 1.2 14.3 +/- 0.7 D-23 19.2 +/- 1.6 12.1 +/- 1.4 13.0 +/- 1.0 9.3 +/- 0.7 D-28 23.2+/-1.6 20.7 +/-1.4 ND 8

17.6 +/- 0.7 D-29 24.6 +/- 1.2 19.1 +/-1.3 19.4+/-1.4 17.2 +/- 0.5 D-30 21.0+/-1.3 16.7 +/- 2.2 16.7 +/- 1.4 15.2 +/- 1.5 D-31 24.6+/-1.6 19.9 +/- 2.0 19.8 +/- 1.5 17.9 +/- 1.4 D-32 22.6+/-1.0 16.9+/-1.5 18.7 +/- 1.1 14.4+/-1.2 D-82 23.3+/-1.2 15.2+/-1.4 ND 8

16.1+/-0.7 D-83 20.5 +/- 0.8 14.1 +/-1.7 15.6 +/- 1.0 13.5 +/- 0.7 D-84 22.4 +/- 1.1 17.5+/-1.3 16.1 +/-1.5 17.0+/-1.1 D-85 24.0 +/- 0.6 16.3+/-1.3 18.2 +/- 0.9 16.6 +/- 0.8 D-86 22.9 +/- 2.3 23.7+/-1.5 15.7 +/- 1.6 18.7 +/- 2.0 D-91 23.5+/-1.2 ND 8

17.8 +/- 1.4 19.9 +/- 0.9 Mean+/- s.d.

22.7 +/- 1.6 17.7 +/- 3.0 16.9+/-1.8 15.4 +/-2.7 a "ND"= No data; see Table 2.0, Program Deviations.

12-1

Table 12. 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 21.7+/-1.5 12.9 +/- 1.9 17.4 +/- 1.4 14.5 +/- 1.3 D-44 22.2+/-1.0 18.4 +/- 0.9 18.2+/-1.1 20.7 +/- 0.6 D-45 20.0 +/- 1.1 16.4 +/- 1.3 15.8 +/- 1.3 16.8+/-1.1 D-46 23.5 +/- 1.4 18.0 +/- 1.6 19.0 +/- 1.6 20.1 +/-1.3 D-47 23.1 +/- 1.2 17.4 +/- 1.3 18.4 +/- 1.2 20.2 +/- 1.0 D-48 22.9 +/- 2.0 16.8 +/- 1.1 22.0+/-1.8 17.9 +/- 0.6 Mean+/- s.d.

22.3 +/- 1.3 16.7 +/- 2.0 18.5 +/- 2.0 18.3 +/- 2.4 Within 3.0 mi. of Stack D-33 19.1 +/- 0.9 14.8 +/- 1.1 12.8 +/- 0.9 11.9 +/- 0.5 D-34 18.6 +/- 0.9 14.7 +/- 1.6 13.7 +/-0.9 11.4+/-0.8 D-35 20.6 +/- 0.8 13.9 +/- 1.6 14.4 +/- 0.8 11.8 +/-0.7 D-36 20.9 +/- 0.7 14.6+/-1.4 15.0 +/- 1.0 12.2 +/- 0.8 D-37 22.5+/-1.5 15.0+/-1.2 17.0 +/- 1.5 12.5 +/- 0.9 D-38 22.3 +/- 1.1 17.9+/-1.7 16.4+/-1.4 16.0 +/- 0.8 D-39 22.5 +/- 1.3 17.8 +/- 1.3 ND 8

15.0 +/- 0.7 D-40 21.1 +/-0.7 14.4+/-1.4 16.2+/-1.1 14.3 +/- 0.7 D-41 23.3 +/- 1.3 16.9+/-1.7 19.3 +/- 1.7 17.5 +/- 1.2 D-42 19.9+/-1.0 15.5+/-1.5 ND 8

17.2+/-1.1 Mean+/- s.d.

21.1+/-1.6 15.5 +/- 1.4 15.6 +/- 2.1 14.0 +/- 2.3 ISFSI Fenceline D-161 52.0 +/- 3.3 41.1 +/- 2.1 47.9 +/- 3.2 69.5 +/- 4.3 D-162 22.2 +/- 0.7 15.0 +/- 1.5 17.8 +/- 1.3 20.0 +/- 1.2 D-163 48.3+/-1.5 37.0+/-1.3 48.1 +/- 1.1 64.4 +/- 2.1 D-164 22.4 +/- 0.9 15.0+/-2.1 16.7 +/- 1.2 18.7 +/- 1.2 Mean+/- s.d.

36.2 +/- 16.2 27.0 +/- 14.0 32.6 +/- 17.8 43.1 +/- 27.6 a "ND"= No data; see Table 2.0, Program Deviations.

12-2

Table 13.

Milk samples, analyses for iodine-131 and gamma emitting isotopes.

Collection: Milk samples are collected monthly throughout the year.

Location D-76 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-09-20 ND" 02-11-20 ND" 03-11-20 ND 8

04-14-20 ND 8

05-12-20 ND 8

06-16-20 ND 8

07-14-20 ND 8

08-11-20 ND 8

09-15-20 ND 8

10-13-20 ND 8

11-17-20 ND 8

12-15-20 ND 8

Location D-110 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-09-20 DMI-68

< 0.3 1527 +/- 120

< 4.6

< 3.8

< 19.6

< 2.0 02-11-20 DMI-315

< 0.3 1493 +/- 128

< 2.6

< 9.4

< 1.6 03-11-20 DMI-719

< 0.3 1475 +/- 122

< 4.1

< 3.9

< 8.6

< 1.9 04-14-20 DMI-1120

< 0.4 1472 +/- 115

< 3.3

< 2.4

< 9.7

< 2.9 05-12-20 DMI-1468

< 0.3 1334 +/- 123

< 4.2

< 3.7

< 13.9

< 4.4 06-16-20 DMI-2027

< 0.4 1505 +/- 119

< 4.2

< 3.0

< 8.0

< 4.0 07-14-20 DMI-2382

< 0.3 1364 +/- 110

< 3.7

< 3.2

< 13.1

< 3.0 08-11-20 DMI-2855

< 0.4 1451 +/- 119

< 3.4

< 3.5

< 14.3

< 2.4 09-15-20 DMI-3269

< 0.3 1337 +/- 107

< 3.6

< 3.9

< 14.8

< 1.0 10-13-20 DMI-3708

< 0.3 1322 +/- 115

< 4.1

< 3.5

< 16.2

< 2.0 11-17-20 DMI-4325

< 0.2 1499 +/- 119

< 4.6

< 3.8

< 16.1

< 1.9 12-15-20 ND 8

"ND" = No data; see Table 2.0, Program Deviations.

13-1

Table 13.

Milk samples, analyses for iodine-131 and gamma emitting isotopes.

Collection: Milk samples are collected monthly throughout the year.

Location D-138 Date Lab Concentration (pCi/L)

Collected Code 1-131 K-40 Cs-134 Cs-137 Ba-140 La-140 01-09-20 DMI-106

< 0.4 1381 +/- 118

< 4.0

< 3.1

< 11.0

< 4.5 02-11-20 DMI-316

< 0.3 1556 +/- 120

< 3.7

< 11.2

< 1.1 03-11-20 DMI-720

< 0.3 1346 +/- 130

< 4.6

< 3.3

< 15.9

< 1.9 04-14-20 DMI-1121

< 0.3 1413+/-115

< 3.5

< 2.9

< 10.3

< 1.3 05-12-20 DMI-1469

< 0.3 1483 +/- 117

< 3.9

< 4.8

< 8.6

< 2.8 06-16-20 DMI-2028

< 0.4 1575+/-116

< 3.6

< 4.4

< 9.8

< 2.7 07-14-20 DMI-2383

< 0.3 1479 +/- 110

< 3.1

< 10.0

< 1.0 08-11-20 DMI-2856 ND" 09-15-20 ND" 10-13-20 ND" 11-17-20 ND" 12-15-20 ND" "ND" = No data; see Table 2.0, Program Deviations.

13-2

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Monthly Units: pCi/L DWW-113 Date Collected 01-14-20 H-3

< 158 1-131

< 0.3 Mn-54

< 3.4 Fe-59

< 6.3 Co-58

< 3.1 Co-60

< 2.4 Zn-65

< 4.8 Nb-95

< 4.6 Zr-95

< 3.9 1-131

< 3.5 Cs-134

< 3.2 Cs-137

< 2.2 Ba-140

< 17.5 La-140

< 3.0 PSC Lab Code DWW-697 Date Collected 03-09-20 H-3

< 151 1-131

< 0.3 Mn-54

< 4.1 Fe-59

< 6.0 Co-58

< 2.5 Co-60

< 3.3 Zn-65

< 7.7 Nb-95

< 2.6 Zr-95

< 6.3 1-131

< 4.2 Cs-134

< 3.5 Cs-137

< 3.5 Ba-140

< 10.3 La-140

< 1.3 D-52 Drinking Water HP Breakroom PSC DWW-352 DWW-353 02-11-20 02-11-20

< 154

< 0.3

< 3.7

< 1.4

< 4.7

< 2.3

< 3.1

< 3.0

< 3.3

< 4.8

< 5.2

< 1.9

< 2.3

< 4.0

< 4.5

< 2.9

< 4.8

< 3.5

< 3.6

< 4.0

< 2.3

< 15.3

< 11.4

< 1.8

< 1.7 W.C.C.

DWW-1122 DWW-1496 04-14-20 05-14-20

< 158

< 153

< 0.3

< 4.1

< 6.8

< 6.5

< 2.2

< 3.0

< 3.1

< 2.9

< 3.6

< 8.8

< 2.5

< 3.6

< 4.4

< 2.5

< 3.1

< 3.5

< 3.8

< 3.7

< 3.3

< 13.3

< 10.0

< 1.5

< 4.3 14-1 T.C.

DWW-354 02-11-20

< 154

< 0.3

< 1.7

< 2.9

< 1.8

< 1.6

< 1.8

< 1.5

< 2.9

< 2.1

< 1.7

< 9.1

< 2.2 PSC DWW-1999 06-11-20

< 156

< 0.3

< 3.3

< 5.7

< 2.9

< 3.4

< 3.7

< 3.1

< 4.2

< 2.8

< 3.6

< 3.5

< 11.1

< 4.5

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Monthly Units: pCi/L DWW-2479 Date Collected 07-14-20 H-3

< 159 1-131

< 0.3 Mn-54

< 3.3 Fe-59

< 4.7 Co-58

< 2.2 Co-60

< 2.2 Zn-65

< 4.0 Nb-95

< 1.3 Zr-95

< 3.9 1-131

< 3.2 Cs-134

< 3.0 Cs-137

< 3.0 Ba-140

< 10.2 La-140

< 2.4 Lab Code DWW-4352 Date Collected 11-17-20 H-3

< 160 1-131

< 0.3 Mn-54

< 1.7 Fe-59

< 5.8 Co-58

< 2.1 Co-60

< 2.4 Zn-65

< 5.3 Nb-95

< 4.2 Zr-95

< 5.2 1-131

< 3.7 Cs-134

< 3.5 Cs-137

< 2.3 Ba-140

< 10.7 La-140

< 2.2 D-52 Drinking Water ND" 08-17-20 DWW-4651 12-16-20

< 161

< 0.4

< 3.9

< 3.7

< 4.5

< 7.9

< 2.4

< 4.5

< 4.4

< 4.7

< 3.2

< 9.8

< 3.2 a "ND"= No data; see Table 2.0, Program Deviations.

14-2 DWW-3270 09-14-20

< 159

< 0.2

< 3.3

< 5.1

< 0.7

< 1.6

< 7.4

< 3.3

< 5.0

< 4.6

< 3.8

< 3.6

< 8.2

< 1.9 DWW-3807 10-15-20

< 157

< 0.3

< 2.5

< 5.2

< 1.8

< 2.4

< 2.7

< 2.6

< 4.4

< 8.1

< 3.9

< 4.0

< 11.9

< 3.3

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Monthly Units: pCi/L DWW-114 Date Collected 01-14-20 H-3

< 158 1-131

< 0.3 Mn-54

< 1.5 Fe-59

< 4.1 Co-58

< 2.2 Co-60

< 2.5 Zn-65

< 2.0 Nb-95

< 3.3 Zr-95

< 4.2 1-131

< 4.3 Cs-134

< 3.3 Cs-137

< 2.9 Ba-140

< 11.8 La-140

< 1.3 Lab Code DWW-1497 Date Collected 05-14-20 H-3

< 153 1-131

< 0.3 Mn-54

< 2.2 Fe-59

< 7.7 Co-58

< 2.6 Co-60

< 2.2 Zn-65

< 7.8 Nb-95

< 2.3 Zr-95

< 3.5 1-131

< 4.9 Cs-134

< 4.0 Cs-137

< 2.2 Ba-140

< 10.3 La-140

< 3.7 D-53 Treated Municipal Water, Drinking Water DWW-271 DWW-698 02-06-20 03-09-20

< 154

< 151

< 0.4

< 0.3

< 1.7

< 2.6

< 4.5

< 4.3

< 1.6

< 2.1

< 2.3

< 2.7

< 5.3

< 2.4

< 2.9

< 3.8

< 5.4

< 5.5

< 4.2

< 2.9

< 3.4

< 3.7

< 3.0

< 4.0

< 11.0

< 10.0

< 1.4

< 3.5 DWW-2000 DWW-2480 06-11-20 07-14-20

< 156

< 159

< 0.4

< 0.3

< 2.2

< 1.9

< 2.6

< 1.7

< 0.7

< 1.1

< 1.7

< 1.5

< 2.1

< 1.4

< 1.6

< 2.7

< 2.6

< 3.6

< 2.9

< 2.1

< 2.3

< 2.5

< 11.6

< 8.9

< 1.2

< 1.6 14-3 DWW-1188 04-15-20

< 156

< 0.4

< 1.5

< 2.7

< 1.6

< 1.9

< 4.8

< 1.7

< 2.9

< 2.6

< 2.3

< 8.3

< 1.2 DWW-2998 08-17-20

< 156

< 0.4

< 2.3

< 4.6

< 1.8

< 1.9

< 4.8

< 3.4

< 5.2

< 7.0

< 3.1

< 2.5

< 10.6

< 3.5

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Monthly Units: pCi/L DWW-3271 Date Collected 09-14-20 H-3

< 159 1-131

< 0.4 Mn-54

< 4.1 Fe-59

< 4.3 Co-58

< 3.0 Co-60

< 3.8 Zn-65

< 6.0 Nb-95

< 2.8 Zr-95

< 8.9 1-131

< 5.0 Cs-134

< 4.0 Cs-137

< 5.0 Ba-140

< 17.0 La-140

< 1.6 D-53 Treated Municipal Water, Drinking Water DWW-3808 DWW-4353 10-15-20 11-17-20

< 157

< 160

< 0.3

< 0.2

< 2.8

< 3.7

< 2.8

< 7.2

< 1.4

< 3.1

< 2.8

< 2.7

< 5.9

< 3.9

< 2.5

< 3.4

< 5.3

< 7.3

< 6.5

< 7.0

< 3.8

< 4.9

< 3.3

< 3.6

< 13.5

< 16.0

< 3.3

< 2.3 14-4 DWW-4652 12-16-20

< 161

< 0.5

< 5.6

< 11.9

< 6.3

< 3.8

< 16.6

< 9.3

< 6.5

< 9.3

< 6.4

< 5.3

< 30.5

< 6.6

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Monthly Units: pCi/L DWW-115 Date Collected 01-14-20 H-3

< 158 1-131

< 0.4 Mn-54

< 2.3 Fe-59

< 3.3 Co-58

< 2.3 Co-60

< 2.8 Zn-65

< 5.1 Nb-95

< 5.8 Zr-95

< 7.1 1-131

< 4.5 Cs-134

< 4.3 Cs-137

< 3.7 Ba-140

< 13.5 La-140

< 3.2 Lab Code DWW-1498 Date Collected 05-14-20 H-3

< 153 1-131

< 0.3 Mn-54

< 3.0 Fe-59

< 4.7 Co-58

< 2.8 Co-60

< 2.3 Zn-65

< 3.2 Nb-95

< 4.4 Zr-95

< 5.2 1-131

< 3.5 Cs-134

< 3.3 Cs-137

< 2.0 Ba-140

< 13.2 La-140

< 3.7 D-54 Untreated Municipal Water, Drinking Water DWW-272 DWW-699 02-06-20 03-09-20

< 154

< 151

< 0.5

< 0.3

< 3.2

< 3.5

< 3.9

< 3.7

< 3.4

< 2.3

< 2.5

< 6.8

< 5.2

< 6.2

< 2.4

< 7.6

< 5.6

< 3.1

< 3.8

< 4.3

< 3.9

< 4.7

< 2.8

< 17.1

< 14.2

< 4.3

< 2.8 DWW-2002 DWW-2481 06-11-20 07-14-20

< 156

< 159

< 0.3

< 3.4

< 3.9

< 6.5

< 4.8

< 2.6

< 4.9

< 2.8

< 3.6

< 2.0

< 4.5

< 3.4

< 3.3

< 6.0

< 6.6

< 4.4

< 4.6

< 3.3

< 4.4

< 3.2

< 2.7

< 8.3

< 16.9

< 4.1

< 3.8 14-5 DWW-1189 04-15-20

< 156

< 0.4

< 4.0

< 8.9

< 3.7

< 2.3

< 7.1

< 5.0

< 4.1

< 3.1

< 4.1

< 3.0

< 8.0

< 1.7 DWW-2999 08-17-20

< 156

< 0.4

< 3.2

< 5.5

< 1.8

< 3.2

< 4.2

< 3.5

< 3.6

< 6.7

< 3.9

< 2.9

< 8.9

< 5.6

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Monthly Units: pCi/L DWW-3272 Date Collected 09-14-20 H-3

< 159 1-131

< 0.5 Mn-54

< 3.7 Fe-59

< 5.5 Co-58

< 2.3 Co-60

< 3.6 Zn-65

< 5.7 Nb-95

< 2.6 Zr-95

< 6.0 1-131

< 4.4 Cs-134

< 4.4 Cs-137

< 3.1 Ba-140

< 11.1 La-140

< 3.1 D-54 Untreated Municipal Water, Drinking Water DWW-3809 DWW-4354 10-15-20 11-17-20

< 157

< 160

< 0.5

< 0.3

< 4.6

< 4.7

< 5.7

< 4.3

< 3.6

< 5.2

< 3.0

< 2.8

< 8.9

< 9.7

< 6.2

< 3.2

< 8.1

< 9.4

< 7.3

< 6.5

< 5.3

< 5.4

< 4.8

< 16.6

< 13.4

< 2.4

< 5.1 14-6 DWW-4653 12-16-20

< 161

< 0.4

< 2.0

< 4.7

< 2.1

< 1.7

< 4.8

< 4.4

< 4.2

< 5.2

< 3.6

< 3.1

< 12.6

< 1.8

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Quarterly Units: pCi/L DWW-273 Date Collected 02-06-20 H-3

< 154 1-131

< 0.5 Mn-54

< 2.2 Fe-59

< 3.9 Co-58

< 2.1 Co-60

< 1.7 Zn-65

< 4.7 Nb-95

< 1.7 Zr-95

< 3.9 1-131

< 3.3 Cs-134

< 2.6 Cs-137

< 2.3 Ba-140

< 8.7 La-140

< 2.4 Location Lab Code DWW-274 Date Collected 02-06-20 H-3

< 154 1-131

< 0.3 Mn-54

< 3.0 Fe-59

< 4.0 Co-58

< 3.6 Co-60

< 3.0 Zn-65

< 4.9 Nb-95

< 2.9 Zr-95

< 3.9 1-131

< 3.6 Cs-134

< 3.9 Cs-137

< 3.1 Ba-140

< 12.9 La-140

< 2.0 D-55 On-site Treated Drinking Water DWW-1187 DWW-3000 04-14-20 08-17-20

< 156

< 0.3

< 2.5

< 3.2

< 6.1

< 4.7

< 3.4

< 2.4

< 2.2

< 8.7

< 8.0

< 4.8

< 4.0

< 6.1

< 3.7

< 4.1

< 3.8

< 3.6

< 4.4

< 3.2

< 1.9

< 15.2

< 12.7

< 2.1

< 2.3 D-57 Untreated Drinking Water DWW-1123 DWW-2886 04-14-20 08-17-20

< 158

< 159

< 0.4

< 0.2

< 2.6

< 2.5

< 5.4

< 7.0

< 2.5

< 3.4

< 2.8

< 2.7

< 5.9

< 4.7

< 4.4

< 3.4

< 7.5

< 5.0

< 3.3

< 3.1

< 4.2

< 3.6

< 4.4

< 3.1

< 8.3

< 9.3

< 4.2

< 2.0 14-7 DWW-4355 11-17-20

< 160

< 0.3

< 3.2

< 7.2

< 1.9

< 2.6

< 3.1

< 4.6

< 6.2

< 4.1

< 4.7

< 12.9

< 5.0 DWW-4326 11-17-20

< 157

< 0.3

< 2.2

< 5.0

< 3.8

< 3.1

< 2.8

< 4.5

< 6.3

< 2.5

< 4.5

< 2.1

< 18.6

< 3.5

Table 14. Well water samples, analyses for gamma emitting isotopes iodine-131 and tritium.

Location Lab Code Collection: Quarterly Units: pCi/L DWW-275 Date Collected 02-06-20 H-3

< 154 1-131

< 0.3 Mn-54

< 1.3 Fe-59

< 6.4 Co-58

< 3.1 Co-60

< 1.4 Zn-65

< 6.8 Nb-95

< 2.9 Zr-95

< 5.6 1-131

< 4.3 Cs-134

< 3.9 Cs-137

< 2.4 Ba-140

< 12.0 La-140

< 1.7 Location Lab Code DWW-276 Date Collected 02-06-20 H-3

< 154 1-131

< 0.5 Mn-54

< 2.1 Fe-59

< 3.1 Co-58

< 1.8 Co-60

< 2.9 Zn-65

< 4.5 Nb-95

< 1.8 Zr-95

< 3.4 1-131

< 2.4 Cs-134

< 2.6 Cs-137

< 1.9 Ba-140

< 8.6 La-140

< 3.0 D-58 Untreated Drinking Water DWW-1124 DWW-2887 04-14-20 08-17-20

< 158

< 159

< 0.5

< 0.2

< 1.1

< 1.8

< 3.7

< 6.3

< 1.4

< 1.9

< 2.0

< 2.3

< 3.1

< 6.1

< 2.2

< 2.7

< 4.0

< 4.1

< 2.7

< 3.5

< 2.6

< 4.0

< 2.6

< 2.7

< 7.6

< 10.8

< 1.6

< 2.9 D-72(C) Untreated Drinking Water DWW-1125 DWW-2888 04-14-20 08-17-20

< 158

< 159

< 0.3

< 2.7

< 4.3

< 4.1

< 5.2

< 1.7

< 4.3

< 1.4

< 4.2

< 3.6

< 4.2

< 3.3

< 3.2

< 4.8

< 7.3

< 3.6

< 3.7

< 3.4

< 4.7

< 3.8

< 2.3

< 8.4

< 14.2

< 2.8

< 5.8 14-8 DWW-4327 11-17-20

< 157

< 0.3

< 4.4

< 3.3

< 4.5

< 8.4

< 4.3

< 6.3

< 3.9

< 4.8

< 12.5

< 4.0 DWW-4328 11-17-20

< 157

< 0.3

< 2.6

< 4.4

< 2.6

< 1.6

< 6.5

< 4.6

< 4.1

< 4.2

< 3.2

< 2.6

< 11.7

< 2.4

Table 15. Vegetation (broadleaf), analyses for iodine-131 and other gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-118 Lab Code DVE-2494 Date Collected 07-16-20 Sample Type Cabbage K-40 2.08 +/- 0.26 Mn-54

< 0.010 Fe-59

< 0.012 Co-58

< 0.008 Co-60

< 0.005 Zn-65

< 0.014 Nb-95

< 0.008 Zr-95

< 0.011 Ru-103

< 0.005 Ru-106

< 0.063 1-131

< 0.013 Cs-134

< 0.011 Cs-137

< 0.008 Ce-141

< 0.019 Ce-144

< 0.087 Location D-57 Lab Code DVE-3083 Date Collected 08-28-20 Sample Type Rhubarb Leaves K-40 4.93 +/- 0.47 Mn-54

< 0.013 Fe-59

< 0.022 Co-58

< 0.010 Co-60

< 0.019 Zn-65

< 0.029 Nb-95

< 0.012 Zr-95

< 0.022 Ru-103

< 0.012 Ru-106

< 0.113 1-131

< 0.020 Cs-134

< 0.019 Cs-137

< 0.013 Ce-141

< 0.019 Ce-144

< 0.075 D-58 D-58 DVE-2496 DVE-2497 07-16-20 07-16-20 Cucumber Leaves Pumpkin Leaves 4.31 +/- 0.58 3.69 +/- 0.66

< 0.020

< 0.027

< 0.026

< 0.042

< 0.013

< 0.016

< 0.018

< 0.027

< 0.030

< 0.059

< 0.011

< 0.032

< 0.041

< 0.037

< 0.024

< 0.029

< 0.189

< 0.218

< 0.034

< 0.032

< 0.022

< 0.031

< 0.016

< 0.026

< 0.034

< 0.029

< 0.114

< 0.162 D-110 D-138(C)

DVE-3084 DVE-3087 08-28-20 08-28-20 Rhubarb Leaves Rhubarb Leaves 3.36 +/- 0.31 3.45 +/- 0.34

< 0.009

< 0.011

< 0.018

< 0.021

< 0.008

< 0.007

< 0.011

< 0.017

< 0.015

< 0.023

< 0.009

< 0.008

< 0.014

< 0.015

< 0.009

< 0.008

< 0.078

< 0.071

< 0.015

< 0.013

< 0.014

< 0.013

< 0.009

< 0.008

< 0.014

< 0.055

< 0.056 15-1 D-58 DVE-2498 07-16-20 Letuce 5.03 +/- 0.72

< 0.021

< 0.047

< 0.015

< 0.026

< 0.069

< 0.030

< 0.038

< 0.025

< 0.151

< 0.036

< 0.025

< 0.027

< 0.040

< 0.110

Table 15. Vegetation (broadleaf), analyses for iodine-131 and other gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-59 Lab Code DVE-3162 Date Collected 09-04-20 Sample Type Green Leafy K-40 4.88 +/- 0.47 Mn-54

< 0.022 Fe-59

< 0.044 Co-58

< 0.030 Co-60

< 0.013 Zn-65

< 0.051 Nb-95

< 0.030 Zr-95

< 0.046 Ru-103

< 0.026 Ru-106

< 0.222 1-131

< 0.059 Cs-134

< 0.022 Cs-137

< 0.026 Ce-141

< 0.026 Ce-144

< 0.120 Location D-59 Lab Code DVE-3166 Date Collected 09-04-20 Sample Type Green Leafy K-40 4.80 +/- 0.59 Mn-54

< 0.017 Fe-59

< 0.034 Co-58

< 0.016 Co-60

< 0.024 Zn-65

< 0.036 Nb-95

< 0.020 Zr-95

< 0.030 Ru-103

< 0.019 Ru-106

< 0.157 1-131

< 0.039 Cs-134

< 0.026 Cs-137

< 0.017 Ce-141

< 0.029 Ce-144

< 0.102 a Sample size less than 100 g.

D-59 D-59 DVE-3163 DVE-3164 09-04-20 09-04-20 Cucumber leaves a

Pumpkin leaves a

3.15 +/- 0.45 5.43 +/- 0.60

< 0.032

< 0.020

< 0.054

< 0.074

< 0.022

< 0.034

< 0.014

< 0.035

< 0.056

< 0.060

< 0.036

< 0.037

< 0.040

< 0.031

< 0.025

< 0.273

< 0.284

< 0.055

< 0.047

< 0.026

< 0.029

< 0.031

< 0.019

< 0.046

< 0.043

< 0.170

< 0.184 15-2 D-59 DVE-3165 09-04-20 Green Leafy 3.07 +/- 0.38

< 0.012

< 0.024

< 0.012

< 0.017

< 0.012

< 0.013

< 0.021

< 0.011

< 0.102

< 0.021

< 0.016

< 0.010

< 0.020

< 0.072

Table 16. Vegetation (hay and grain), analyses for gamma-emitting isotopes.

Collection: Annually Units: pCi/g wet Location D-16 Lab Code DVE-3747 Date Collected 10-12-20 Sample Type Corn K-40 2.77 +/- 0.29 Mn-54

< 0.009 Fe-59

< 0.027 Co-58

< 0.009 Co-60

< 0.009 Zn-65

< 0.012 Nb-95

< 0.008 Zr-95

< 0.017 Ru-103

< 0.012 Ru-106

< 0.110 1-131

< 0.045 Cs-134

< 0.011 Cs-137

< 0.006 Ce-141

< 0.018 Ce-144

< 0.057 Location D-110 Lab Code DVE-3086 Date Collected 08-28-20 Sample Type Hay K-40 20.13 +/- 1.12 Mn-54

< 0.024 Fe-59

< 0.049 Co-58

< 0.028 Co-60

< 0.031 Zn-65

< 0.061 Nb-95

< 0.029 Zr-95

< 0.047 Ru-103

< 0.021 Ru-106

< 0.175 1-131

< 0.043 Cs-134

< 0.031 Cs-137

< 0.034 Ce-141

< 0.044 Ce-144

< 0.197 D-57 D-57 DVE-3082 DVE-3748 08-28-20 10-12-20 Hay Corn 21.02 +/- 1.37 2.88 +/- 0.26

< 0.023

< 0.012

< 0.112

< 0.024

< 0.023

< 0.010

< 0.050

< 0.007

< 0.113

< 0.009

< 0.037

< 0.014

< 0.046

< 0.016

< 0.026

< 0.011

< 0.330

< 0.049

< 0.053

< 0.059

< 0.045

< 0.010

< 0.032

< 0.011

< 0.067

< 0.018

< 0.282

< 0.073 D-110 DVE-3752 10-12-20 Corn 2.61 +/- 0.22

< 0.007

< 0.014

< 0.008

< 0.005

< 0.017

< 0.010

< 0.007

< 0.010

< 0.066

< 0.055

< 0.008

< 0.007

< 0.017

< 0.045 16-1 D-96 D-96 DVE-3750 DVE-3751 10-12-20 10-12-20 Beans Hay 16.86 +/- 0.69 8.80 +/- 0.44

< 0.014

< 0.021

< 0.026

< 0.036

< 0.014

< 0.017

< 0.009

< 0.017

< 0.034

< 0.038

< 0.018

< 0.019

< 0.041

< 0.023

< 0.018

< 0.136

< 0.111

< 0.047

< 0.032

< 0.014

< 0.019

< 0.013

< 0.021

< 0.023

< 0.042

< 0.092

< 0.114 D-138 (C)

D-138(C)

DVE-3088 DVE-3753 08-28-20 10-12-20 Hay Corn 11.45 +/- 0.94 2.89 +/- 0.26

< 0.028

< 0.008

< 0.028

< 0.022

< 0.021

< 0.010

< 0.019

< 0.010

< 0.074

< 0.013

< 0.035

< 0.013

< 0.048

< 0.011

< 0.027

< 0.009

< 0.149

< 0.076

< 0.041

< 0.049

< 0.033

< 0.009

< 0.023

< 0.007

< 0.059

< 0.016

< 0.266

< 0.070

Table 17. Surface water samples, analyses for iodine-131, tritium and gamma-emitting isotopes.

Collection:

Monthly Units:

pCi/L Location:

D-49 Lab Code DSW-116 DSW-508 DSW-790 DSW-1190 DSW-1564 DSW-2039 Date Collected 01-14-20 02-25-20 03-17-20 04-15-20 05-18-20 06-17-20 H-3

< 158

< 157

< 159

< 156

< 158

< 156 1-131 (Chemistry)

< 0.3

< 0.5

< 0.3

< 0.3 Mn-54

< 2.9

< 2.2

< 3.1

< 2.9

< 3.2

< 2.9 Fe-59

< 7.1

< 4.9

< 2.4

< 7.0

< 4.1

< 4.1 Co-58

< 3.9

< 3.5

< 1.7

< 2.2

< 3.5

< 3.6 Co-60

< 2.6

< 2.2

< 2.5

< 3.2

< 2.3

< 1.3 Zn-65

< 4.8

< 6.6

< 3.2

< 3.9

< 4.6

< 7.2 Nb-95

< 3.5

< 1.7

< 3.7

< 3.2

< 3.5

< 2.2 Zr-95

< 6.0

< 3.3

< 6.6

< 7.3

< 3.8

< 4.8 1-131

< 3.8

< 4.0

< 3.0

< 3.6

< 2.2

< 4.5 Cs-134

< 4.2

< 3.4

< 3.3

< 3.9

< 3.3

< 3.5 Cs-137

< 4.2

< 3.1

< 4.0

< 4.1

< 2.7

< 3.0 Ba-140

< 13.6

< 10.1

< 9.0

< 10.7

< 12.5

< 8.8 La-140

< 2.6

< 3.1

< 1.6

< 4.2

< 4.4

< 2.8 Lab Code DSW-2487 DSW-2986 DSW-3355 DSW-3675 DSW-4274 DSW-4646 Date Collected 07-16-20 08-19-20 09-17-20 10-08-20 11-12-20 12-14-20 H-3

< 159

< 156

< 158

< 157

< 161 1-131 (Chemistry)

< 0.4

< 0.3

< 0.4

< 0.3

< 0.4

< 0.4 Mn-54

< 2.2

< 2.4

< 3.0

< 2.8

< 4.4

< 3.0 Fe-59

< 5.2

< 2.3

< 4.1

< 3.7

< 2.3

< 2.5 Co-58

< 2.1

< 3.9

< 2.6

< 2.2

< 2.1

< 2.4 Co-60

< 1.5

< 3.5

< 4.2

< 2.9

< 3.1

< 1.6 Zn-65

< 4.5

< 8.7

< 7.2

< 3.9

< 5.1

< 2.5 Nb-95

< 2.0

< 6.2

< 4.6

< 3.3

< 3.7

< 1.8 Zr-95

< 5.7

< 5.3

< 6.8

< 5.4

< 5.1

< 3.8 1-131

< 4.7

< 3.8

< 6.5

< 6.1

< 5.0

< 4.3 Cs-134

< 3.5

< 4.4

< 3.7

< 3.6

< 3.8

< 2.9 Cs-137

< 3.1

< 4.6

< 2.6

< 3.5

< 2.8

< 3.0 Ba-140

< 14.4

< 23.0

< 16.6

< 18.6

< 13.7

< 9.0 La-140

< 1.4

< 4.6

< 3.2

< 2.6

< 3.0 17-1

Table 17. Surface water samples, analyses for tritium and gamma-emitting isotopes.

Collection:

Monthly Units:

pCi/L Location:

D-50 Lab Code DSW-117 DSW-509 DSW-791 DSW-1191 DSW-1565 DSW-2040 Date Collected 01-14-20 02-25-20 03-17-20 04-15-20 05-18-20 06-17-20 H-3

< 158

< 157

< 159

< 156

< 158

< 156 Mn-54

< 3.0

< 3.6

< 2.3

< 2.0

< 3.8

< 3.3 Fe-59

< 4.7

< 4.2

< 4.7

< 5.2

< 8.3

< 11.3 Co-58

< 3.8

< 4.1

< 2.1

< 3.2

< 3.3

< 5.6 Co-60

< 3.9

< 2.8

< 1.5

< 2.1

< 3.8

< 4.3 Zn-65

< 12.5

< 6.6

< 6.0

< 5.5

< 10.8

< 10.7 Nb-95

< 2.8

< 2.6

< 2.2

< 3.0

< 5.0

< 5.6 Zr-95

< 5.8

< 4.2

< 5.8

< 3.5

< 6.7

< 5.3 1-131

< 5.2

< 6.7

< 3.4

< 4.6

< 6.5

< 5.1 Cs-134

< 4.0

< 3.8

< 3.4

< 3.5

< 4.8

< 4.7 Cs-137

< 3.9

< 4.4

< 2.9

< 2.6

< 3.1

< 4.7 Ba-140

< 13.6

< 18.5

< 19.4

< 15.9

< 13.8

< 9.9 La-140

< 2.4

< 1.9

< 2.8

< 7.2

< 4.8 Lab Code DSW-2488 DSW-2987 DSW-3356 DSW-3676 DSW-4275 DSW-4647 Date Collected 07-16-20 08-19-20 09-17-20 10-08-20 11-12-20 12-14-20 H-3

< 159

< 156

< 158

< 157

< 161 Mn-54

< 1.8

< 4.6

< 5.5

< 4.3

< 4.8

< 6.8 Fe-59

< 3.4

< 7.1

< 7.6

< 9.4

< 8.0 Co-58

< 1.8

< 2.6

< 3.9

< 3.3

< 3.6

< 3.9 Co-60

< 1.6

< 4.0

< 4.6

< 3.5

< 2.3

< 3.4 Zn-65

< 3.0

< 11.0

< 10.1

< 2.9

< 8.0

< 19.2 Nb-95

< 1.4

< 3.8

< 5.5

< 3.0

< 6.2

< 10.8 Zr-95

< 2.4

< 6.8

< 10.8

< 7.4

< 8.1

< 12.4 1-131

< 3.5

< 8.6

< 7.8

< 7.3

< 12.9

< 13.7 Cs-134

< 2.2

< 4.7

< 5.2

< 4.5

< 4.7

< 6.8 Cs-137

< 2.7

< 2.9

< 3.2

< 3.1

< 4.4

< 6.8 Ba-140

< 10.9

< 22.7

< 26.4

< 24.2

< 22.5

< 34.5 La-140

< 1.7

< 7.4

< 4.1

< 5.7

< 5.0

< 10.7 17-2

Table 17. Surface water samples, analyses for tritium and gamma-emitting isotopes.

Collection:

Monthly Units:

pCi/L Location:

D-51 Lab Code DSW-118 DSW-510 DSW-792 DSW-1192 DSW-1566 DSW-2041 Date Collected 01-14-20 02-25-20 03-17-20 04-15-20 05-18-20 06-17-20 H-3

< 158

< 157

< 159

< 156

< 158

< 156 Mn-54

< 2.4

< 2.7

< 2.9

< 2.1

< 1.7

< 2.7 Fe-59

< 4.8

< 3.6

< 5.2

< 2.9

< 4.4

< 5.2 Co-58

< 1.6

< 2.9

< 3.7

< 1.9

< 2.6

< 2.8 Co-60

< 1.5

< 2.6

< 2.8

< 1.7

< 2.9

< 3.9 Zn-65

< 1.5

< 5.0

< 3.2

< 6.7

< 5.5

< 5.1 Nb-95

< 3.3

< 2.4

< 6.8

< 3.1

< 4.2

< 2.9 Zr-95

< 4.7

< 4.8

< 7.6

< 3.6

< 3.3

< 4.8 1-131

< 4.4

< 3.4

< 8.1

< 3.6

< 6.0

< 5.2 Cs-134

< 3.0

< 3.5

< 4.6

< 2.9

< 3.5

< 4.0 Cs-137

< 3.0

< 2.6

< 3.8

< 2.0

< 3.2

< 2.1 Ba-140

< 11.5

< 12.4

< 10.0

< 13.1

< 16.6

< 12.1 La-140

< 3.8

< 3.7

< 3.4

< 1.9

< 5.7

< 3.9 Lab Code DSW-2489 NS" DSW-3357 NS" DSW-4276 DSW-4648 Date Collected 07-16-20 08-19-20 09-17-20 10-08-20 11-12-20 12-14-20 H-3

< 159

< 158

< 157

< 161 Mn-54

< 2.1

< 3.8

< 4.7

< 3.4 Fe-59

< 3.6

< 8.2

< 4.6

< 7.1 Co-58

< 1.4

< 4.5

< 4.4

< 3.8 Co-60

< 1.4

< 2.8

< 4.1

< 5.2 Zn-65

< 3.2

< 6.1

< 3.0

< 5.4 Nb-95

< 1.9

< 2.1

< 3.2

< 4.2 Zr-95

< 3.4

< 6.7

< 5.4

< 7.1 1-131

< 3.1

< 8.5

< 10.7

< 8.9 Cs-134

< 2.1

< 4.5

< 5.0

< 5.1 Cs-137

< 1.6

< 3.2

< 3.6

< 4.9 Ba-140

< 10.7

< 19.5

< 30.2

< 21.6 La-140

< 2.0

< 4.9

< 3.8

< 4.1 a "NS" = No sample; see Table 2.0, Program Deviations.

17-3

Table 17. Surface water samples, analyses for iodine-131, tritium and gamma-emitting isotopes.

Collection:

Monthly Units:

pCi/L Location:

D-61 Lab Code DSW-119 DSW-511 DSW-793 DSW-1193 DSW-1567 DSW-2042 Date Collected 01-14-20 02-25-20 03-17-20 04-15-20 05-18-20 06-17-20 H-3

< 158

< 157

< 159

< 156

< 158

< 156 l-131(Chemistry)

< 0.3

< 0.5

< 0.4

< 0.3 Mn-54

< 2.4

< 2.2

< 3.2

< 2.1

< 2.5

< 2.4 Fe-59

< 5.5

< 3.0

< 4.6

< 4.7

< 4.4

< 4.7 Co-58

< 1.6

< 2.0

< 1.9

< 2.5

< 2.8

< 1.9 Co-60

< 2.5

< 1.3

< 2.6

< 2.8

< 2.4

< 2.4 Zn-65

< 7.5

< 1.7

< 3.7

< 2.8

< 3.6

< 5.8 Nb-95

< 2.5

< 1.4

< 3.1

< 2.6

< 4.0

< 2.3 Zr-95

< 3.8

< 3.1

< 6.1

< 6.3

< 5.0

< 3.1 1-131

< 4.8

< 2.7

< 5.7

< 4.2

< 2.8

< 3.2 Cs-134

< 4.3

< 2.7

< 3.3

< 3.8

< 3.1 Cs-137

< 3.4

< 2.6

< 3.7

< 2.9

< 2.2

< 3.4 Ba-140

< 12.9

< 7.4

< 9.1

< 11.8

< 7.5

< 12.1 La-140

< 1.4

< 2.4

< 1.9

< 3.6

< 3.5

< 2.5 Lab Code DSW-2490 NS" DSW-3358 DSW-3677 DSW-4277 DSW-4649 Date Collected 07-16-20 08-19-20 09-17-20 10-08-20 11-12-20 12-14-20 H-3

< 159

< 158

< 157

< 161 1-131 (Chemistry)

< 0.4

< 0.3

< 0.4

< 0.3

< 0.4 Mn-54

< 3.0

< 1.7

< 3.1

< 3.2 Fe-59

< 7.0

< 3.7

< 6.5

< 3.2

< 5.2 Co-58

< 3.9

< 2.5

< 3.1

< 3.9

< 3.6 Co-60

< 3.6

< 2.3

< 1.0

< 5.3

< 1.0 Zn-65

< 9.9

< 4.1

< 5.9

< 4.7

< 6.0 Nb-95

< 4.4

< 2.6

< 3.7

< 2.5

< 2.5 Zr-95

< 6.4

< 3.1

< 5.7

< 7.8

< 5.8 1-131

< 3.8

< 3.9

< 7.2

< 5.0

< 6.7 Cs-134

< 5.1

< 3.3

< 3.9

< 4.8

< 4.1 Cs-137

< 4.1

< 2.0

< 3.7

< 4.7

< 3.6 Ba-140

< 15.2

< 13.1

< 19.5

< 22.6

< 14.8 La-140

< 2.7

< 2.1

< 2.7

< 3.2

< 2.7 "NS" = No sample; see Table 2.0, Program Deviations.

17-4

Table 17. Surface water samples, analyses for tritium and gamma-emitting isotopes.

Collection:

Monthly Units:

pCi/L Location:

D-99 Lab Code DSW-120 ND" DSW-794 DSW-1194 DSW-1569 DSW-2043 Date Collected 01-14-20 02-25-20 03-17-20 04-15-20 05-18-20 06-17-20 H-3

< 158

< 159

< 156

< 158

< 156 Mn-54

< 3.6

< 2.4

< 2.7

< 1.8

< 3.7 Fe-59

< 7.1

< 4.4

< 6.4

< 5.3

< 9.0 Co-58

< 2.7

< 3.0

< 2.0

< 4.3 Co-60

< 2.3

< 1.8

< 2.2

< 1.6

< 4.5 Zn-65

< 7.0

< 7.5

< 6.7

< 4.1

< 7.9 Nb-95

< 5.5

< 2.5

< 3.9

< 2.7

< 2.7 Zr-95

< 5.1

< 4.7

< 5.4

< 3.7

< 5.4 1-131

< 6.1

< 4.4

< 6.3

< 4.7

< 4.4 Cs-134

< 4.0

< 3.3

< 4.1

< 2.5

< 4.9 Cs-137

< 3.5

< 3.4

< 3.6

< 3.0

< 3.5 Ba-140

< 15.2

< 11.8

< 12.5

< 10.0

< 16.3 La-140

< 5.2

< 1.7

< 3.5

< 2.4

< 6.2 Lab Code DSW-2491 NSb DSW-3359 DSW-3678 DSW-4278 DSW-4650 Date Collected 07-16-20 08-19-20 09-17-20 10-08-20 11-12-20 12-14-20 H-3

< 159

< 158

< 157

< 161 Mn-54

< 1.7

< 3.9

< 3.0

< 2.6

< 3.7 Fe-59

< 2.4

< 11.4

< 5.7

< 3.2

< 7.1 Co-58

< 1.7

< 6.0

< 3.5

< 3.6

< 3.7 Co-60

< 1.4

< 3.8

< 4.9

< 3.3

< 3.7 Zn-65

< 1.5

< 14.7

< 6.9

< 4.6

< 5.8 Nb-95

< 2.3

< 10.2

< 4.2

< 4.8

< 3.7 Zr-95

< 2.2

< 9.1

< 5.7

< 7.9

< 8.4 1-131

< 2.9

< 8.5

< 7.2

< 10.5

< 7.6 Cs-134

< 2.3

< 6.5

< 4.8

< 5.0

< 5.0 Cs-137

< 2.5

< 6.4

< 2.9

< 5.0

< 3.8 Ba-140

< 11.3

< 27.7

< 18.7

< 12.8

< 26.8 La-140

< 2.0

< 5.9

< 3.5

< 2.9

< 5.3

""ND" = No data; see Table 2.0, Program Deviations.

b "NS" = No sample; see Table 2.0, Program Deviations.

17-5

Table 18. 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-834 DSW-2054 DSW-3387 DSW-4669 Sr-89

< 0.58

< 0.59

< 0.52

< 0.59 Sr-90

< 0.52

< 0.46

< 0.47

< 0.51 Location D-61 Period 1st Qtr.

2nd Qtr.

3rd Qtr.

4th Qtr.

Lab Code DSW-835 DSW-2055 DSW-3388 DSW-4670 Sr-89

< 0.69

< 0.67

< 0.61

< 0.65 Sr-90

< 0.57

< 0.49

< 0.53

< 0.52 18-1

Table 19. Fish, analyses of edible portion for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g wet Location Lab Code DF-1896 Date Collected 06-03-20 Sample Type Channel Catfish K-40 2.98 +/- 0.38 Mn-54

< 0.019 Fe-59

< 0.041 Co-58

< 0.011 Co-60

< 0.014 Zn-65

< 0.021 Nb-95

< 0.042 Zr-95

< 0.041 Ru-103

< 0.034 Ru-106

< 0.120 Cs-134

< 0.016 Cs-137

< 0.018 Ce-141

< 0.095 Ce-144

< 0.130 Location Lab Code DF-2891 Date Collected 08-14-20 Channel Catfish Sample Type K-40 2.82 +/- 0.35 Mn-54

< 0.016 Fe-59

< 0.051 Co-58

< 0.015 Co-60

< 0.011 Zn-65

< 0.017 Nb-95

< 0.024 Zr-95

< 0.028 Ru-103

< 0.021 Ru-106

< 0.114 Cs-134

< 0.014 Cs-137

< 0.006 Ce-141

< 0.039 Ce-144

< 0.077 Upstream, D-49 DF-1897 DF-1898 06-03-20 06-03-20 Northern Pike Largemouth Bass 3.65 +/- 0.46 4.14 +/- 0.50

< 0.022

< 0.019

< 0.082

< 0.064

< 0.016

< 0.029

< 0.011

< 0.037

< 0.035

< 0.056

< 0.063

< 0.059

< 0.056

< 0.028

< 0.047

< 0.132

< 0.155

< 0.021

< 0.009

< 0.022

< 0.099

< 0.061

< 0.142

< 0.173 Upstream, D-49 DF-2893 08-14-20 White Crappie 3.72 +/- 0.45

< 0.015

< 0.062

< 0.027

< 0.012

< 0.030

< 0.042

< 0.047

< 0.040

< 0.117

< 0.015

< 0.018

< 0.053

< 0.118 19-1

Table 19. Fish, analyses of edible portion for gamma-emitting isotopes.

Collection: Semiannually Units: pCi/g wet Location Lab Code DF-1899 Date Collected 06-03-20 Sample Type Channel Catfish K-40 2.97 +/- 0.40 Mn-54

< 0.012 Fe-59

< 0.041 Co-58

< 0.015 Co-60

< 0.011 Zn-65

< 0.024 Nb-95

< 0.043 Zr-95

< 0.043 Ru-103

< 0.030 Ru-106

< 0.188 Cs-134

< 0.017 Cs-137

< 0.012 Ce-141

< 0.048 Ce-144

< 0.087 Location Lab Code DF-2894 Date Collected 08-14-20 Sample Type Channel Catfish K-40 3.31 +/- 0.47 Mn-54

< 0.021 Fe-59

< 0.049 Co-58

< 0.021 Co-60

< 0.016 Zn-65

< 0.038 Nb-95

< 0.055 Zr-95

< 0.051 Ru-103

< 0.048 Ru-106

< 0.194 Cs-134

< 0.024 Cs-137

< 0.013 Ce-141

< 0.069 Ce-144

< 0.133 Downstream, D-61 DF-1900 DF-1901 06-03-20 06-03-20 Smallmouth Bass Northern Pike 4.22 +/- 0.56 3.95 +/- 0.48

< 0.019

< 0.014

< 0.075

< 0.044

< 0.045

< 0.017

< 0.012

< 0.008

< 0.024

< 0.027

< 0.069

< 0.032

< 0.086

< 0.065

< 0.045

< 0.201

< 0.166

< 0.023

< 0.019

< 0.021

< 0.016

< 0.121

< 0.116

< 0.147

< 0.104 Downstream, D-61 DF-2895 08-14-20 Smallmouth Bass 3.68 +/- 0.53

< 0.026

< 0.066

< 0.024

< 0.019

< 0.027

< 0.053

< 0.032

< 0.041

< 0.193

< 0.024

< 0.012

< 0.069

< 0.118 19-2

Table 20. River sediment, analysis for gamma-emitting isotopes.

Location Lab Code Collection: Semiannually Units: pCi/g dry Date Collected K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 Location Lab Code Date Collected K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 D-49 (Control)

DBS-2225 DBS-4080 07-02-20 10-20-20 7.16 +/- 0.41 7.60 +/- 0.43

< 0.010

< 0.013

< 0.042

< 0.046

< 0.012

< 0.009

< 0.011

< 0.005

< 0.025

< 0.024

< 0.017

< 0.027

< 0.028

< 0.021

< 0.075

< 0.062

< 0.009

< 0.010

< 0.012

< 0.062

< 0.041

< 0.056

< 0.064 D-51 (Discharge)

DBS-2226 DBS-4081 07-02-20 10-20-20 8.24 +/- 0.45 6.90 +/- 0.41

< 0.017

< 0.015

< 0.049

< 0.040

< 0.023

< 0.019

< 0.012

< 0.013

< 0.024

< 0.027

< 0.025

< 0.023

< 0.032

< 0.035

< 0.023

< 0.018

< 0.088

< 0.092

< 0.012

< 0.010

< 0.009

< 0.015

< 0.066

< 0.047

< 0.058

< 0.101 20-1

Table 20. River sediment, analysis for gamma-emitting isotopes.

Location Lab Code Collection: Semiannually Units: pCi/g dry Date Collected K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 D-107A (North Drainage Ditch)

DBS-2227 DBS-4082 07-02-20 10-20-20 4.70 +/- 0.37 4.38 +/- 0.41

< 0.014

< 0.017

< 0.051

< 0.049

< 0.015

< 0.014

< 0.011

< 0.025

< 0.033

< 0.027

< 0.028

< 0.029

< 0.024

< 0.020

< 0.031

< 0.097

< 0.101

< 0.010

< 0.011

< 0.008

< 0.012

< 0.068

< 0.049

< 0.058

< 0.098 20-2

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

Location Lab Code Collection: Annually Units: pCi/g dry Date Collected Sr-90 H-3 (pCi/L)

K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 Zr-95 Ru-103 Ru-106 Cs-134 Cs-137 Ce-141 Ce-144 D-15a DSO-2261 07-06-20

< 0.032

< 160 12.39 +/- 0.60

< 0.024

< 0.063

< 0.024

< 0.017

< 0.054

< 0.041

< 0.044

< 0.034

< 0.129

< 0.014 0.068 +/- 0.021 a

< 0.095

< 0.127 D-16 DSO-2262 07-06-20

< 0.044

< 160 9.50 +/- 0.48

< 0.019

< 0.054

< 0.015

< 0.013

< 0.038

< 0.028

< 0.024

< 0.023

< 0.090

< 0.012 0.092 +/- 0.017 a

< 0.056

< 0.067 a Cs-137 determined to be from nuclear weapons testing and not from Duane Arnold Energy Center operations.

21-1

Table 22.

Groundwater Protection Program Summary.

Precipitation samples for tritium analysis.

Units: pCi/L Lab Code Date H-3 Lab Code Date H-3 D-016 D-111 DP-22 01/02/20

< 158 DP-24 01/02/20

< 158 DP-241 02/03/20 172 +/- 85 DP-243 02/03/20 283 +/- 91 DP-584 03/02/20

< 157 DP-586 03/02/20

< 157 DP-961 04/02/20 165 +/- 82 DP-963 04/02/20

< 157 DP-1402 05/04/20

< 152 DP-1404 05/04/20 201 +/- 82 DP-1844 06/01/20

< 150 DP-1846 06/01/20 223 +/- 86 DP-2263 07/06/20

< 158 DP-2266 07/06/20

< 158 DP-2737 08/03/20

< 158 DP-2739 08/03/20

< 158 DP-3136 09/02/20

< 162 DP-3138 09/02/20

< 162 DP-3575 10/05/20

< 158 DP-3577 10/05/20 161 +/- 86 DP-4187 11/02/20

< 155 DP-4182 11/02/20

< 155 DP-4500 12/02/20

< 155 DP-4503 12/02/20

< 155 D-112 D-114 DP-25 01/02/20

< 158 NDa DP-244 02/03/20 172 +/- 85 NDa DP-587 03/02/20

< 157 NDa DP-964 04/02/20

< 157 NDa DP-1405 05/04/20

< 152 NDa DP-1847 06/01/20

< 150 NDa DP-2267 07/06/20 192 +/- 85 NDa DP-2740 08/03/20

< 158 NDa DP-3139 09/02/20

< 162 NDa DP-3578 10/05/20

< 156 NDa DP-4183 11/02/20

< 155 NDa DP-4504 12/02/20

< 155 NDa D-127 D-128 DP-26 01/02/20 210 +/- 85 DP-27 01/02/20

< 158 DP-245 02/03/20 1380 +/- 134 DP-246 02/03/20 300 +/- 92 DP-590 03/02/20 466 +/- 97 DP-591 03/02/20 211 +/- 85 DP-966 04/02/20 792 +/- 111 DP-967 04/02/20 267 +/- 87 DP-1407 05/04/20 1086 +/- 121 DP-1408 05/04/20 300 +/- 87 DP-1849 06/01/20 700 +/- 108 DP-1851 06/01/20 230 +/- 87 DP-2269 07/06/20 970 +/- 120 DP-2270 07/06/20 329 +/- 92 DP-2742 08/03/20 529 +/- 101 DP-2743 08/03/20 166 +/- 84 DP-3141 09/02/20 509 +/- 103 DP-3142 09/02/20 260 +/- 92 DP-3581 10/05/20 342 +/- 95 DP-3582 10/05/20 241 +/- 90 DP-4185 11/02/20 279 +/- 90 DP-4186 11/02/20

< 155 DP-4506 12/02/20 242 +/- 86 DP-4507 12/02/20

< 155 D-081 D-115 DP-23 01/02/20

< 158 01/02/20 NSb DP-242 02/03/20

< 153 02/03/20 NSb DP-585 03/02/20 169 +/- 82 DP-589 03/02/20

< 157 DP-962 04/02/20

< 157 DP-965 04/02/20

< 157 DP-1403 05/04/20 192 +/- 82 DP-1406 05/04/20 161 +/- 80 DP-1845 06/01/20

< 150 DP-1848 06/01/20 152 +/- 83 DP-2264 07/06/20

< 158 DP-2268 07/06/20

< 158 DP-2738 08/03/20

< 158 DP-2741 08/03/20

< 158 DP-3137 09/02/20

< 162 DP-3140 09/02/20

< 162 DP-3576 10/05/20

< 156 DP-3580 10/05/20

< 156 DP-4180 11/02/20

< 155 DP-4184 11/02/20

< 155 DP-4501 12/02/20

< 155 DP-4505 12/02/20

< 155 a No sampler at the location.

b No sample sent.

22-1

Table 22.

Groundwater Protection Program Summary.

Precipitation, monthly collections, analyses for gamma emitting isotopes.

Location: D-16 Concentration {pCi/L)

Lab Code Date 54Mn 59Fe saCo 6oCo 6szn gsNb 9szr 1311 134Cs 131cs 140Ba 140La DP-22 01/02/20

< 5.9

< 8.6

< 4.3

< 7.1 < 11.3

< 6.1

< 7.9

< 8.4

< 5.8

< 7.7 < 29.8

< 4.3 DP-241 02/03/20

< 7.1 < 10.8

< 8.9

< 8.5 < 15.9

< 6.8 < 12.9

< 9.6

< 9.3

< 9.6 < 28.0

< 6.2 DP-584 03/02/20 a

DP-961 04102120

< 4.8 < 15.8

< 7.1

< 5.3 < 10.2

< 6.4

< 9.6

< 9.2

< 7.3

< 5.6 < 34.3 < 10.0 DP-1402 05104120

< 3.0

< 4.9

< 3.5

< 3.8

< 4.0

< 2.8

< 5.7

< 3.0

< 3.4

< 2.8 < 12.0

< 3.3 DP-1844 06/01/20

< 3.7

< 2.6

< 3.1

< 1.6

< 2.2

< 4.1

< 6.6

< 6.2

< 3.7

< 4.6 < 17.2

< 5.6 DP-2263 07/06/20

< 3.6

< 8.3

< 6.6

< 3.5

< 5.1

< 7.1 < 11.9

< 9.0

< 7.6

< 6.0 < 27.9

< 7.1 DP-2737 08/03/20

< 1.9

< 5.0

< 2.2

< 3.2

< 6.9

< 1.8

< 6.3

< 3.6

< 3.1

< 3.4

< 9.1

< 3.6 DP-3136 09102120

< 2.7

< 3.7

< 3.2

< 3.4

< 6.6

< 3.5

< 6.0

< 3.0

< 2.9 < 15.5

< 3.5 DP-3575 10/05/20

< 6.3

< 8.5

< 4.3

< 6.0

< 9.1

< 7.2 < 10.6 < 10.5

< 6.9

< 3.8 < 29.8

< 6.6 DP-4187 11/02/20

< 6.8

< 7.9

< 7.5

< 8.8 < 11.2

< 7.3 < 12.3 < 11.9

< 9.8

< 7.0 < 37.0

< 6.0 DP-4500 12/02/20

< 3.1

< 5.4

< 3.7

< 2.4

< 5.3

< 4.0

< 5.8

< 5.3

< 3.3

< 3.9 < 19.3

< 4.4 a Sample very small; LLD not met; results discarded per station request.

22-2

Table 22.

Groundwater Protection Program Summary.

Ground water, Monitoring wells, analyses for tritium a.

Lab Code Date H-3 (pCi/L)

D-111A (01A)

DWW-457 02/17/20 218 +/- 85 DWW-1650 05/11/20

< 157 DWW-2807 08/04/20

< 158 DWW-4370 11/03/20

< 160 D-111B (01B)

DWW-458 02/17/20

< 156 DWW-1651 05/11/20

< 157 DWW-2808 08/04/20

< 158 DWW-4371 11/03/20

< 160 D-112A (02A DWW-459 02/17/20

< 156 DWW-1652 05/11/20

< 157 DWW-2898 08/04/20

< 160 DWW-4372 11/03/20

< 160 D-112B (02B)

DWW-460 02/17/20

< 156 DWW-1653 05/11/20

< 157 DWW-2899 08/04/20

< 160 DWW-4373 11/03/20

< 160 D-113A (03A)

DWW-467 02/18/20

< 156 DWW-1654 05/11/20

< 157 DWW-2900 08/04/20

< 160 DWW-4375 11/03/20

< 160 D-113B (03B)

DWW-468 02/18/20

< 156 DWW-1656 05/11/20

< 157 DWW-2901 08/04/20

< 160 DWW-4376 11/03/20

< 160 D-114A (04A)

DWW-469 02/18/20 172 +/- 82 DWW-1692 05/12/20 205 +/- 84 DWW-2902 08/04/20 190 +/- 85 DWW-4514 11/05/20 162 +/- 86 D-114B (04B)

DWW-470 02/18/20

< 156 DWW-1693 05/12/20

< 157 DWW-2903 08/04/20

< 160 DWW-4515 11/05/20

< 161 D-115A (05A)

DWW-461 02/17/20

< 156 DWW-1694 05/11/20

< 157 DWW-2904 08/04/20

< 160 DWW-4377 11/03/20 201 +/- 85 D-115B (05B)

DWW-462 02/17/20

< 156 DWW-1695 05/11/20

< 157 DWW-2905 08/04/20

< 160 DWW-4378 11/03/20

< 160 a Analyses for gamma, gross alpha, Sr-89, Sr-90, Fe-55 and Ni-63 will be performed if trilium activity> 1 K pCi/l.

22-3

Table 22.

Groundwater Protection Program Summary.

Ground water, Monitoring wells, analyses for tritium*.

Lab Code Date H-3 (pCi/L)

D-116A (06A)

DWW-471 02/18/20

< 156 DWW-1696 05/11/20

< 157 DWW-2906 08/04/20

< 160 DWW-4379 11/03/20

< 160 D-1168 (068)

DWW-472 02/18/20

< 156 DWW-1698 05/11/20

< 157 DWW-2907 08/04/20

< 160 DWW-4380 11/03/20

< 160 D-127A (07A)

DWW-513 02/19/20 3094 +/- 180 DWW-4397 11/04/20 339 +/- 92 DWW-854 03/19/20 1455 +/- 135 DWW-1051 04/07/20 1235 +/- 128 DWW-1661 05/13/20 1720 +/- 143 DWW-2144 06/16/20 679 +/- 109 DWW-2335 07/07/20 734 +/- 110 DWW-2908 08/05/20 873 +/- 116 DWW-3276 09/10/20 748+/-110 D-1278 (078)

DWW-514 02/19/20

< 156 DWW-1662 05/13/20

< 157 DWW-2909 08/05/20

< 159 DWW-4398 11/04/20

< 160 D-128A OBA DWW-69 01/09/20 2658 +/- 170 DWW-548 02/19/20 36921 +/- 575 DWW-1635 05/13/20 4785 +/- 219 DWW-2145 06/16/20 9622 +/- 303 DWW-2357 07107120 15942 +/- 385 DWW-2603 07/20/20 20441 +/- 437 DWW-3014 08/05/20 17278 +/- 401 DWW-3426 09/10/20 14644 +/- 371 DWW-4091 10/13/20 51271 +/- 682 DWW-4585 11/04/20 17758 +/- 405 DWW-4654 12/14/20 3250 +/- 188 D-1288 088 DWW-515 02/19/20 539 +/- 100 DWW-1646 05/13/20 242 +/- 87 DWW-2910 08/05/20 478 +/- 99 DWW-4399 11/04/20 273 +/- 89 D-129A (09A)

DWW-516 02/19/20 457 +/- 96 DWW-4400 11/04/20 307 +/- 91 DWW-1663 05/12/20 709 +/- 108 DWW-2911 08/05/20 623 +/- 105 DWW-3277 09/10/20 589 +/- 103 D-1298 098 DWW-517 02/19/20

< 156 DWW-1664 05/12/20 201 +/- 84 DWW-2912 08/05/20 226 +/- 87 DWW-4401 11/04/20 177 +/- 84

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

22-4

Table 22.

Groundwater Protection Program Summary.

Ground water, Monitoring wells, analyses for tritium*.

Lab Code Date H-3 (pCi/L)

D-130A (10A)

DWW-518 02/19/20

< 156 DWW-4403 11/04/20

< 160 DWW-1665 05/12/20

< 157 DWW-2914 08/05/20 178 +/- 84 DWW-3278 09/10/20

< 159 D-130B (10B)

DWW-520 02/19/20

< 156 DWW-1666 05/12/20

< 157 DWW-2915 08/05/20

< 159 DWW-4404 11/04/20

< 160 D-131A (11A)

DWW-473 02/18/20 268 +/- 87 DWW-1699 05/12/20 181 +/- 83 DWW-2916 08/04/20

< 160 DWW-4516 11/05/20 184 +/- 87 D-131B (11B)

DWW-474 02/18/20

< 156 DWW-1700 05/12/20

< 157 DWW-2917 08/04/20

< 160 DWW-4517 11/05/20

< 161 D-132A (12A)

DWW-476 02/18/20 191 +/- 83 DWW-1701 05/12/20 338 +/- 91 DWW-2918 08/04/20 230 +/- 87 DWW-4518 11/05/20

< 161 D-132B 12B DWW-477 02/18/20 438 +/- 95 DWW-1702 05/12/20 330 +/- 91 DWW-2919 08/04/20 289 +/- 90 DWW-4519 11/05/20 207 +/- 88 D-133A (13A)

DWW-478 02/18/20

< 156 DWW-1703 05/12/20

< 157 DWW-2920 08/04/20

< 160 DWW-4520 11/05/20

< 161 D-133B (13B)

DWW-479 02/18/20

< 156 DWW-1704 05/12/20

< 157 DWW-2921 08/04/20

< 160 DWW-4521 11/05/20

< 161 D-134A (14A)

DWW-521 02/19/20 330 +/- 90 DWW-3427 09/10/20 2323 +/- 164 DWW-1640 05/12/20 338 +/- 91 DWW-4586 11/04/20 6519 +/- 253 DWW-2599 07/20/20 585 +/- 105 DWW-4656 12/14/20 227 +/- 92 DWW-2922 08/05/20 487 +/- 99 a Analyses for gamma, gross alpha, Sr-89, Sr-90, Fe-55 and Ni-63 will be performed if tritium activity> 1 K pCi/L.

22-5

Table 22.

Groundwater Protection Program Summary.

Ground water, Monitoring wells, analyses for tritium '.

Lab Code Date H-3 (pCi/L)

D-1348 (148)

DWW-522 02/19/20 422 +/- 95 DWW-1641 05/12/20 293 +/- 89 D-135A (15A)

DWW-482 02/18/20

< 156 DWW-1705 05/12/20

< 157 DWW-2923 08/04/20

< 160 DWW-4522 11/05/20

< 161 D-1358 (158)

DWW-483 02/18/20

< 156 DWW-1706 05/12/20

< 157 DWW-2924 08/04/20

< 160 DWW-4523 11/05/20

< 161 D-136A (16A)

DWW-523 02/19/20

< 156 DWW-1642 05/13/20

< 158 DWW-2925 08/05/20

< 159 DWW-4405 11/05/20

< 160 D-1368 (168)

DWW-1643 05/13/20 169 +/- 83 DWW-2926 08/06/20

< 159 DWW-4406 11/05/20

< 160 D-137 (17C)

DWW-524 02/19/20

< 156 DWW-1644 05/13/20

< 158 DWW-2927 08/05/20

< 159 DWW-4526 11/05/20

< 161 D-62 (18A)

DWW-525 02/18/20 785 +/- 110 DWW-4407 11/04/20 1717 +/- 145 DWW-1645 05/12/20 511 +/- 99 DWW-2928 08/05/20 1602 +/- 141 DWW-3279 09/10/20 917 +/- 117 D-63 (19A)

DWW-526 02/18/20 1368 +/- 132 DWW-1052 04/07/20 2830 +/- 175 DWW-1647 05/13/20 546 +/- 101 DWW-2146 06/16/20

< 159 DWW-2929 08/05/20 187 +/- 85 DWW-3280 09/10/20

< 159

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

22-6

Table 22.

Groundwater Protection Program Summary.

Ground water, Monitoring wells, analyses for tritium *.

Lab Code Date H-3 (pCi/L)

D-64 (20A)

DI/VIN-527 02/18/20 236 +/- 86 DI/VIN-855 03/19/20 204 +/- 85 DI/VIN-1648 05/13/20

< 157 DI/VIN-2930 08/05/20

< 159 DI/VIN-3281 09/10/20

< 159 DI/VIN-4408 11/04/20

< 160 D-65 21A DI/VIN-528 02/18/20 1563 +/- 138 DI/VIN-856 03/19/20 410 +/- 95 DI/VIN-1636 05/13/20 2614 +/- 169 DI/VIN-2147 06/16/20 899 +/- 118 DI/VIN-2931 08/05/20 201 +/- 85 DI/VIN-3282 09/10/20

< 159 DI/VIN-4402 11/04/20 467 +/- 98 D-66 (22A)

DI/VIN-70 01/07/20 24335 +/- 470 DI/VIN-4659 12/14/20 270 +/- 94 DI/VIN-549 02/19/20 28083 +/- 503 DI/VIN-968 03/26/20 25182 +/-478 DI/VIN-1053 04/07/20 37701 +/- 583 DI/VIN-1637 05/13/20 20662 +/- 434 DI/VIN-2148 06/16/20 41867 +/- 617 DI/VIN-2358 07107120 40800 +/- 609 DI/VIN-2604 07120120 36039 +/- 577 DI/VIN-3015 08/05/20 25842 +/- 488 DI/VIN-3429 09/10/20 24840 +/- 478 DI/VIN-4092 10/13/20 6275 +/- 248 DI/VIN-4587 11/04/20 6638 +/- 255 D-67 23A DI/VIN-71 01/07/20 6165 +/- 245 DI/VIN-4094 10/13/20 15271 +/- 377 DI/VIN-550 02/19/20 6340 +/- 247 DI/VIN-4589 11/04/20 13160+/-351 DI/VIN-969 03/26/20 4502 +/- 212 DI/VIN-4658 12/14/20 9784 +/- 306 DI/VIN-1054 04/07/20 11787 +/- 331 DI/VIN-1638 05/13/20 12121 +/- 336 DI/VIN-2140 06/16/20 11943 +/- 336 DI/VIN-2359 07/07/20 24819 +/- 477 DI/VIN-2606 07/20/20 15318 +/- 380 DI/VIN-3016 08/05/20 20740 +/- 438 DI/VIN-3430 09/10/20 22952 +/- 460 D-165 (24A)

DI/VIN-484 02/18/20

< 156 DI/VIN-1707 05/12/20

< 157 DI/VIN-2932 08/04/20

< 160 DI/VIN-4524 11/05/20

< 161 D-167 (26A)

DI/VIN-485 02/18/20 378 +/- 93 DI/VIN-1708 05/12/20 407 +/- 95 DI/VIN-2933 08/04/20 300 +/- 90

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

22-7

Table 22.

Groundwater Protection Program Summary Ground water, Monitoring wells, analyses for tritium*.

Lab Code Date H-3 (pCi/L)

D-168A (27A)

DWW-488 02/17/20 253 +/- 87 DWW-1709 05/11/20

< 157 DWW-2809 08/04/20

< 158 DWW-4381 11/03/20 242 +/- 88 D-1688 (278)

DWW-489 02/17/20

< 156 DWW-1710 05/11/20

< 157 DWW-2810 08/04/20

< 158 DWW-4382 11/03/20

< 160 D-169A 28A)

DWW-490 02/17120

< 156 DWW-4383 11/03/20 1202 +/- 128 DWW-1711 05/11/20 472 +/- 98 DWW-2811 08/04/20 1395+/-136 DWW-3810 10/13/20 1009+/-119 D-1698 (288)

DWW-576 02/26/20

< 157 DWW-1712 05/11/20

< 157 DWW-2812 08/04/20

< 158 DWW-4384 11/03/20

< 160 D-170A (29A)

DWW-72 01/07/20 478 +/- 98 DWW-2600 07/20/20 791 +/- 114 DWW-491 02/17/20 383 +/- 93 DWW-2798 08/04/20 904 +/- 118 DWW-1047 04/07/20 478 +/- 98 DWW-3811 10/13/20 419 +/- 95 DWW-1713 05/11/20 561 +/- 101 DWW-4385 11/03/20 309 +/- 91 DWW-2141 06/16/20 585 +/- 105 DWW-2160 06/23/20 560 +/- 104 DWW-2336 07107120 662 +/- 107 D-1708 (298)

DWW-492 02/17/20 464 +/- 97 DWW-1714 05/11/20 387 +/- 94 DWW-2799 08/04/20 437 +/- 99 DWW-4386 11/03/20 593 +/- 104 D-171A (30A DWW-452 02/17/20 678 +/- 106 DWW-2601 07/20/20 365 +/- 95 DWW-1715 05/11/20 501 +/- 99 DWW-2801 08/04/20 237 +/- 89 DWW-2161 06/23/20 555 +/- 104 DWW-3812 10/13/20

< 155 DWW-2337 07107/20 353 +/- 93 DWW-4387 11/03/20

< 160 D-1718 (308)

DWW-454 02/17/20

< 156 DWW-1716 05/11/20

< 157 DWW-2935 08/04/20

< 160 DWW-4388 11/03/20

< 160

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

22-8

Table 22.

Groundwater Protection Program Summary*

Ground water, Monitoring wells, analyses for tritium '.

Lab Code Date H-3 (pCi/L)

D-172A (31A)

DWW-486 02/18/20

< 156 DWW-1667 05/11/20

< 157 DWW-2936 08/04/20

< 160 DWW-4389 11/03/20

< 160 D-172B (31B)

DWW-487 02/18/20

< 156 DWW-1668 05/11/20

< 157 DWW-2937 08/04/20

< 160 DWW-4390 11/03/20

< 160 D-173A (32A)

DWW-455 02/17/20 777+/-110 DWW-2602 07/20/20 476 +/- 101 DWW-1049 04/07/20 677 +/- 107 DWW-2802 08/04/20 435 +/- 99 DWW-1669 05/11/20 921 +/- 116 DWW-3283 09/08/20 363 +/- 93 DWW-2142 06/16/20 865 +/- 117 DWW-3813 10/13/20 401 +/- 94 DWW-2162 06/23/20 817 +/- 115 DWW-4391 11/03/20 352 +/- 93 DWW-2338 07/07/20 727 +/- 110 D-173B (32B)

DWW-456 02/17/20 297 +/- 89 DWW-1670 05/11/20 327 +/- 91 DWW-2803 08/04/20

< 158 DWW-4392 11/03/20 264 +/- 89 D-79 MW-33A DWW-691 02/17/20

< 152 DWW-1671 05/11/20

< 157 DWW-2804 08/04/20

< 158 DWW-4393 11/03/20

< 160 D-80 MW-34A DWW-692 02/17/20 267 +/- 86 DWW-1672 05/11/20

< 157 DWW-2805 08/04/20

< 158 DWW-4394 11/03/20 199 +/- 85 D-81 MW-35A DWW-857 03/19/20 228 +/- 86 DWW-1050 04/07/20 269 +/- 88 DWW-1649 05/11/20

< 157 DWW-2143 06/16/20

< 159 DWW-2806 08/04/20 257 +/- 90 DWW-4396 11/03/20 345 +/- 93

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

22-9

Table 22.

Groundwater Protection Program Summary*

Surface water, analysis for tritium.

D-119 (2MH209)

DSW-575 02/25/20

< 157 DSW-3076 08/19/20 261 +/- 92 DSW-1657 05/18/20 192 +/- 84 DSW-4527 11/12/20 180 +/- 83 D-121 (2MH211)

DSW-570 02/25/20 246 +/- 86 DSW-3077 08/19/20

< 162 DSW-1658 05/18/20 229 +/- 86 DSW-4528 11/12/20

< 161 D-122 (Sluice Pond)

DSW-571 02/25/20 187 +/- 83 DSW-3431 09/14/20

< 155 DSW-1933 05/27/20

< 160 DSW-3814 10/13/20

< 155 DSW-3078 08/19/20

< 162 DSW-4529 11/12/20

< 161 D-123 (S. Drainage Ditch)

DSW-572 02/25/20

< 157 DSW-1659 05/18/20

< 157 D-124 (N. Drainage Ditch)

DSW-573 02/25/20

< 157 DSW-3079 08/19/20

< 162 DSW-1660 05/18/20

< 157 DSW-4530 11/12/20

< 161 D-125 (Onsite S. Storm Drain Outfall)

DSW-574 02/25/20

< 157 DSW-2153 06/23/20 967 +/- 120 DSW-1639 05/18/20 4049 +/- 203 DSW-2492 07/16/20 536 +/- 101 DSW-1944 05/27/20 2388 +/- 163 DSW-3080 08/19/20 263 +/- 92 DSW-2105 06/16/20

< 158 DSW-3360 09/17/20

< 158 D-125A D-1258 DSW-1945 05/27/20 3226 +/- 185 DSW-1946 05/27/20 4867 +/- 221 DSW-2106 06/16/20

< 158 DSW-2107 06/16/20

< 158 DSW-2154 06/23/20 436 +/- 99 DSW-2155 06/23/20 240 +/- 89 D-125C D-125D DSW-1947 05/27/20 2135+/-156 DSW-1934 05/27/20

< 160 DSW-2108 06/16/20

< 158 DSW-2109 06/16/20

< 158 DSW-2156 06/23/20 206 +/- 87 DSW-2157 06/23/20 235 +/- 89 D-125E DSW-1935 05/27/20

< 160 DSW-2110 06/16/20 321 +/- 99 DSW-2159 06/23/20

< 159 (1MH213)

D-25 (MH105)

DWW-888 03/30/20

< 157 MH-217 D-27 (MH-107)

DWW-890 03/30/20

< 157 DWW-3534 09/28/20

< 156 MH-219 D-24 (MH-104)

DWW-887 03/30/20 172 +/- 83 DWW-3634 10/02/20

< 158 MH-102 D-26 (MH-106)

DWW-889 03/30/20

< 157 DWW-3635 10/02/20

< 158 22-10

Table 22.

Groundwater Protection Program Summary.

Monitoring wells, analyses for gamma-emitting isotopes.

Lab Code DWW-513 DWW-854 DWW-1051 DWW-1661 DWW-69 DWW-548 DWW-1635 DWW-2145 DWW-2357 DWW-2603 DWW-3014 DWW-3426 Collection Date 2/19/2020 3/19/2020 41712020 5/13/2020 1/9/2020 2/19/2020 5/13/2020 6/16/2020 71712020 712012020 8/5/2020 9/10/2020 DWW-4091 10/13/2020 DWW-4585 11 /4/2020 DWW-4654 12/14/2020 DWW-3427 9/10/2020 DWW-4586 11/4/2020 DWW-2928 8/5/2020 DWW-4407 11 /4/2020 DWW-526 DWW-1052 2/18/2020 41712020 DWW-528 2/18/2020 DWW-1636 5/13/2020 DWW-70 DWW-549 DWW-968 DWW-1053 DWW-1637 1/7/2020 2/19/2020 3/26/2020 41712020 5/13/2020 DWW-2148 6/16/2020 DWW-2358 7/7/2020 DWW-2604 712012020 DWW-3015 8/5/2020 DWW-3429 9/10/2020 DWW-4092 10/13/2020 DWW-4587 11/4/2020 DWW-4657 12/14/2020 D-127A (MW-07A)

< 1.5

< 3.4

< 2.2

< 1.5

< 2.9

< 9.5

< 4.8

< 3.8

< 2.0

< 1.5

< 2.8

< 5.0

< 4.1

< 4.9

< 1.5

< 0.8

< 3.0

<1.6

<1.0

<2.9

< 2.1

< 2.9

< 1.6

< 5.3

< 8.3

< 5.3

< 3.6

< 2.0

< 2.9

< 1.9

< 2.0

< 1.8

< 4.3

< 1.6

< 2.0

< 3.0

< 1.9

< 1.5

< 2.7

< 2.4

< 1.8

< 1.7 D-128A (MW-OBA)

< 5.6

< 3.4

< 2.8

< 6.0

<4.2

< 2.0

< 1.4

< 1.9

< 2.9

< 1.4

< 1.2

< 2.6

< 6.0

< 2.4

< 2.1

< 3.7

< 4.7

< 2.0

< 0.9

< 3.1

< 4.2

< 1.3

< 3.5

< 2.7

< 1.9

< 1.4

< 2.9

< 3.0

< 1.5

< 0.8

< 2.9

< 4.6

< 3.9

< 1.4

< 3.5

< 3.2

< 2.5

< 3.1

< 3.0

< 1.6

< 5.5

< 1.6

< 1.8

< 4.0

< 2.7

< 1.3

< 3.2

< 2.6

< 1.8

< 3.2

< 4.1

< 1.6

< 4.3

< 1.7

< 1.2

< 4.0

< 2.4 D-134A (MW-14A)

< 3.6

< 3.0

< 2.8

< 1.9

< 2.2

< 1.2

< 3.8

< 2.4

< 4.8

< 2.0

< 3.6

< 1.6

<4.2

<1.6

< 3.6

< 1.4

< 3.6

< 2.0

< 1.6

< 3.4

< 2.2

< 1.8

< 1.7

< 1.5

< 3.0

< 1.9

< 1.4

<4.4

< 1.7

< 1.6

<2.1

<2.5

< 1.9

< 5.2

< 1.9

< 2.1

< 3.0

< 2.8

< 3.3

< 1.9

< 1.5

< 1.8

< 5.6

< 1.9

< 1.4

< 3.8

< 3.6

< 3.0

< 1.5

< 1.5 D-62 (MW-18A)

< 2.6

< 8.0

< 2.4

< 2.3

< 2.9

< 4.2

< 4.5

< 2.4

< 2.6

< 6.3

< 2.5

< 2.2

< 4.5

< 4.1

< 5.5

< 2.2

< 1.6 D-63 (MW-19A)

< 1.4

< 2.2

< 0.9

< 1.0

< 2. 7

< 1.4

< 2.0

< 4.8

< 1.7

< 0.9

< 3.1

< 3.3 D-65 (MW-21A)

<2.4

<1.1

<1.4

< 3.3

< 1.9

< 1.5

< 2.2

< 4.9

< 1.4

< 3.3

< 3.4

< 3.3

< 2.0

< 1.3

< 1.5

< 3.6

< 1.5

< 3.5

< 2.8

< 4.0

< 1.8

< 2.3

< 7.1

< 1.8

<4.4

< 4.0 < 10.0

< 1.6

< 2.4

< 1.3

< 3.9 D-66 (MW-22A)

< 3.2

< 1.3

< 1.6

< 1.8

< 1.9

< 1.5

<1.4

<1.7

< 1.3

< 1.1

< 5.1

< 3.2

< 6.1

< 3.7

< 2.7

< 5.7

< 2.9

< 5.6

< 2.4

< 1.4

< 6.3

< 3.1

< 2.4

< 1.8

< 7.9

< 4.3

<3.5

<1.7

< 2.5

< 1.2

< 3.5

< 1.7

< 3.1

< 1.5

< 1.2

<2.7

<6.1

<3.8

<2.2

<4.3

<3.7

<6.5

<4.4

<4.3

<1.3

<2.7

<1.1

<1.9

<3.0

<1.9

<4.1

<1.9

<2.4

< 1.4

< 5.4

< 2.0

< 1.6

< 3.1

< 2.1

< 3.4

< 1.9

< 1.8

< 1.7

< 5.5

< 2.4

< 1.5

< 2.8

< 3.0

< 2.7

< 1.6

< 1.5

< 3.1

< 6.6

< 3.5

< 2.5

< 4.6

< 3.1

< 6.1

< 3.0

< 3.1

< 1.6

< 5.9

< 2.2

< 1.2

< 3.7

< 3.8

< 4.4

< 1.7

< 1.8

< 1.7

< 4.5

< 2.3

< 1.2

< 3.8

< 4.2

< 3.7

< 1.8

< 2.0

< 4.3

< 1.8

< 2.1

< 3.3

< 2.2

< 3.4

< 1.9

< 1.6 a LLDs for Ba-140 and/or La-140 not reached due to age of samples and smaller sample size.

22-11

< 17.3

< 33.3

< 20.2

< 22.4

< 43.4

< 28.8

< 18.9

< 40.9

< 16.6

< 20.7

< 42.7

< 25.0

< 45.3

< 95.0

< 11.7

< 2.3

< 8.7

< 5.6

< 3.9

< 9.2

< 9.0

< 6.4

< 5.8

< 6.8

< 5.6

< 9.6

< 6.5

< 9.4

< 22.8 a

<4.5

< 22.8

< 8.1

< 60.6

< 20.1 a

< 36.9

< 5.5

< 53.6

< 13.0

< 14.4

< 22.7

< 29.8

< 18.5

< 28.3

< 25.4

< 36.9

< 17.4

< 4.5

< 5.7

< 9.3

< 6.3

< 6.1

< 3.7

< 13.9

< 2.5

< 4.5

< 38.0

< 12.6

< 28.9

< 32.4

< 37.0

< 29.7

< 41.3

< 86.0

< 18.2

< 6.2

< 8.6

< 10.0

< 10.4

< 10.2

< 19.2 a

< 3.7

Table 22.

Groundwater Protection Program Summary.

Monitoring wells, analyses for gamma-emitting isotopes.

Collection Lab Code Date 54Mn sgFe 56Co so Co 65Zn gsNb 9szr

>34cs 137Cs 14oBa 14ola D-67 (MW-23A)

DWW-71 1/7/2020

< 2.1

< 5.7

< 2.0

< 1.4

< 3.7

< 2.4

< 4.5

< 1.9

< 2.1

< 26.2

< 7.0 DWW-550 2/19/2020

< 1.3

< 4.1

< 1.5

< 1.4

< 2.2

< 2.6

< 1.7

< 1.2

< 1.4

< 20.2

< 6.3 DWW-969 3/26/2020

< 2.8

< 4.7

< 2.5

< 1.9

< 4.8

< 2.2

< 3.6

< 2.5

< 2.7

< 26.5

< 6.1 DWW-1054 4/7/2020

< 1.4

< 3.6

< 1.2

< 1.0

< 1.6

< 1.2

< 2.0

< 1.1

< 1.4

< 12.0

< 5.0 DWW-1638 5/13/2020

< 1.5

< 5.1

< 1.6

< 3.5

< 2.2

< 3.6

< 1.7

< 1.8

< 17.4

< 3.8 DWW-2140 6/16/2020

< 2.7

< 4.0

< 3.1

< 2.4

< 5.1

< 5.3

< 5.7

< 3.1

< 2.7

< 25.6

< 10.6 DWW-2359 71712020

< 1.3

< 3.0

< 1.6

< 1.5

< 3.6

< 2.2

< 2.7

< 1.6

< 1.8

< 16.5

< 3.8 DWW-2606 7/20/2020

< 1.7

< 3.8

< 2.2

< 1.1

< 2.6

< 2.7

< 3.3

< 1.6

< 1.9

< 16.5

< 4.9 DWW-3016 8/5/2020

< 1.4

< 7.2

< 2.3

< 1.6

< 4.1

< 3.9

< 3.7

< 2.0

< 2.2

< 58.5

< 11.5 DWW-3430 9/10/2020

< 1.0

< 3.9

< 2.2

< 0.9

< 2.6

< 3.1

< 2.8

< 1.5

< 1.9

< 31.7

< 6.6 DWW-4094 10/13/2020

< 2.2

< 4.3

< 2.0

< 1.7

< 2.8

< 3.5

< 4.7

< 1.9

< 2.0

< 45.2

< 8.6 DWW-4589 11/4/2020

< 2.8

< 4.8

< 2.1

< 1.7

< 4.4

< 5.0

< 5.6

< 2.0

< 2.1

< 105.1

< 31.6 a DWW-4658 12/14/2020

< 1.4

< 3.5

< 1.6

< 1.5

< 2.8

< 2.3

< 3.1

< 1.7

< 1.5

< 11.7

< 4.2 28A DWW-2811 8/4/2020

< 2.9

< 5.9

< 3.1

< 2.1

< 7.8

< 4.8

< 8.6

< 5.3

< 3.1

< 41.4

< 9.6 DWW-3810 10/13/2020

< 1.5

< 4.0

< 2.8

< 1.7

< 4.0

< 3.0

< 3.4

< 1.6

< 1.7

< 28.5

< 11.2 DWW-4383 11/3/2020

< 1.5

< 5.0

< 1.8

< 1.5

< 3.8

< 3.9

< 3.7

< 1.9

< 47.1

< 9.4

'LLDs for Ba-140 and/or La-140 not reached due to age of samples and smaller sample size.

22-12

Table 22.

Groundwater Protection Program Summary.

Monitoring wells, conditional analyses for gross alpha, iron-55, nickel-63, strontium-89 and strontium-90 a.

Lab Code DWW-70 DWW-71 DWW-69 DWW-526 DWW-528 DWW-513 DWW-548 DWW-549 DWW-550 DWW-854 DWW-968 DWW-969 DWW-1051 DWW-1052 DWW-1053 DWW-1054 DWW-1635 DWW-1636 DWW-1637 DWW-1638 DWW-1661 DWW-2140 DWW-2145 DWW-2148 DWW-2357 DWW-2358 DWW-2359 DWW-2603 DWW-2604 DWW-2606 DWW-2811 DWW-2928 DWW-3014 DWW-3015 DWW-3016 DWW-3426 DWW-3427 DWW-3429 DWW-3430 DWW-3810 DWW-4091 DWW-4092 DWW-4094 Collection Date 1/7/2020 1/7/2020 1/9/2020 2/18/2020 2/18/2020 2/19/2020 2/19/2020 2/19/2020 2/19/2020 3/19/2020 3/26/2020 3/26/2020 417/2020 4/7/2020 4/7/2020 4/7/2020 5/13/2020 5/13/2020 5/13/2020 5/13/2020 5/13/2020 6/16/2020 6/16/2020 6/16/2020 717/2020 71712020 7/7/2020 7/20/2020 7/20/2020 7/20/2020 8/4/2020 8/5/2020 8/5/2020 8/5/2020 8/5/2020 9/10/2020 9/10/2020 9/10/2020 9/10/2020 10/13/2020 10/13/2020 10/13/2020 10/13/2020 Location d-66 d-67 d-128a d-63 d-65 d-127a d-128a d-66 d-67 d-127a mw-22a mw-23a d-127a mw-19a mw-22a mw-23a d-128a mw-21a mw-22a mw-23a d-127a mw-23a d-128a mw-22a D-128A MW-22A MW-23A d-128a mw-22a mw-23a mw-28a mw-18a d-128a mw-22a mw-23a d-128a d-134a mw-22a mw-23a mw-28a d-128a mw-22a mw-23a Gross Alpha 3.2 +/- 2.0 2.9 +/- 1.7

< 1.7

< 3.9

< 3.4

< 1.4

< 2.8

< 4.0 5.2 +/- 2.0 1.4 +/- 0.8

< 2.4

< 1.0

< 4.7

< 1.9

< 2.2

< 1.7

< 3.0

< 1.9

< 2.2 6.1 +/- 1.1

< 2.2

< 1.3 4.3 +/- 1.5

< 2.0

< 2.1

< 2.0

< 4.8

< 5.3 5.3 +/- 1.7 3.2 +/- 2.0 5.6 +/- 2.2

< 2.4

< 2.1 18.2 +/- 3.8

< 2.3 7.8 +/- 3.2

< 2.0

< 1.9

< 2.1

< 2.4

< 2.6

< 641

< 634

< 650

< 714

< 564

< 563

< 560

< 563

< 556

< 517

< 672

< 685

< 641

< 682

< 612

< 641

< 730

< 682

< 774

< 798

< 730

< 604

< 644

< 604

< 648

< 628

< 653

< 591

< 594

< 602

< 592

< 549

< 518

< 573

< 552

< 631

< 627

< 639

< 635

< 628

< 660

< 640

< 648

< 71

< 69

< 70

< 69

< 70

< 68

< 70

< 69

< 68

< 69

< 68

< 67

< 66

< 65

< 66

< 65

< 79

< 70

< 77

< 81

< 82

< 74

< 70

< 77

< 80

< 77

< 76

< 72

< 74

< 72

< 69

< 66

< 71

< 69

< 70

< 69

< 70

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

'Recount 17.46 +/- 3.79 pCi/L; Reanalysis 25.63 +/- 4.3 pCi/L

< 1.3

< 1.6

< 1.3

< 1.5

< 1.9

< 1.4

< 1.6

< 1.4

< 1.3

< 1.0

< 1.2

< 1.3

< 1.4

< 1.2

< 1.5

< 1.6

< 1.4

< 1.7

< 1.3

< 1.1

< 1.2

< 1.6

< 1.3

< 1.2

< 1.5

< 2.1

< 1.4

< 1.2

< 1.5

< 1.8

< 1.5

< 1.6

< 1.3

< 1.8

< 1.9

< 1.6

< 1.6 NOTE: Gross alpha values are related to the natural radioactive decay of radon gas held dissolved in groundwater.

22-13

< 1.0

< 0.8

< 1.0

< 1.5

< 1.0

< 0.9

< 1.0

< 1.1

< 1.0

< 0.9

< 1.2

< 1.1

< 1.4

< 1.2

< 1.0

< 1.1

< 1.3

< 1.1

< 1.0

< 1.4

< 1.0

< 0.9

< 1.1

< 0.9

< 1.0

< 0.9

< 0.8

< 1.3

< 1.2

< 1.1

Table 22.

Groundwater Protection Program Summary.

Monitoring wells, conditional analyses for gross alpha, iron-55, nickel-63, strontium-89 and strontium-90 8

Collection Lab Code Date Location Gross Alpha ssFe 63Ni agSr go Sr DWW-4383 11/3/2020 mw-28a

< 2.3

< 722

< 72

< 1.7

< 1.1 DWW-4407 11/4/2020 mw-18a

< 2.7

< 721

< 70

< 1.9

< 1.1 DWW-4585 11/4/2020 d-128a

< 3.0

< 619

< 72

< 2.1

< 1.1 DWW-4586 11/4/2020 d-134a

< 2.7

< 639

< 74

< 2.2

< 1.2 DWW-4587 11/4/2020 mw-22a

< 3.2

< 604

< 70

< 1.9

< 1.0 DWW-4589 11/4/2020 mw-23a

< 3.1

< 619

< 64

< 1.8

< 0.9 DWW-4654 12/14/2020 d-128a

< 2.7

< 603

< 72

< 1.2

< 1.0 DWW-4657 12/14/2020 mw-22a

< 3.0

< 588

< 70

< 1.1

< 0.9 DWW-4658 12/14/2020 mw-23a

< 3.3

< 599

< 71

< 1.1

< 1.0

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

NOTE: Gross alpha values are related to the natural radioactive decay of radon gas held dissolved in groundwater.

22-14

~*L_ All E11vironmental, Inc.

,..~/'"\\.I Midwest Laboratory 700 Landwehr Road* Northbrook, IL 60062-2310 phone (847) 564-0700 *fax (847) 564-4517 NOTE:

APPENDIX A INTERLABORATORY AND INTRALABORATORY COMPARISON PROGRAM RESULTS Appendix A is updated four times a year. The complete appendix is included in March, June, September and December monthly progress reports only.

January, 2020 through December, 2020

Appendix A lnterlaboratorv/ lntralaboratory Comparison Program Results Environmental, Inc., Midwest Laboratory has participated in interlaboratory comparison (crosscheck) programs since the formulation of its 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 RAD PT Study Proficiency Testing Program administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

Results in Table A-2 were obtained through participation in the New York Department of Health Environmental Laboratory Approval Program (ELAP) PT.

Table A-3 lists results for thermoluminescent dosimeters (TLDs), via irradiation and evaluation by the University of Wisconsin-Madison Radiation Calibration Laboratory at the University of Wisconsin Medical Radiation Research Center.

Table A-4 lists results of the analyses on intralaboratory "spiked" samples for the past twelve months. All samples are prepared using NIST traceable sources. Data for previous years available upon request.

Table A-5 lists results of the analyses on intralaboratory "blank" samples for the past twelve months. Data for previous years available upon request.

Table A-6 lists analytical results from the intralaboratory "duplicate" program for the past twelve months. Acceptance is based on each result being within 25% of the mean of the two results or the two sigma uncertainties of each result overlap.

The results in Table A-7 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

Results in Table A-8 were obtained through participation in the MRAD PT Study Proficiency Testing Program administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurement Laboratory Quality Assessment Program (EML).

Attachment A lists the laboratory acceptance criteria for various analyses.

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

A-1

Analysis Gamma Emitters Strontium-89, Strontium-90 Potassium-40 Gross alpha Gross beta Tritium Radium-226, Radium-228 Plutonium lodine-129, lodine-131 Nickel-63, Technetium-99, Uranium-238 lron-55 Other Analyses Attachment A ACCEPTANCE CRITERIA FOR INTRALABORATORY "SPIKED" SAMPLES Ratio of lab result to known value.

0.8 to 1.2 0.8 to 1.2 0.8 to 1.2 0.5to1.5 0.8 to 1.2 0.8 to 1.2 0.7to1.3 0.8 to 1.2 0.8 to 1.2 0.7to1.3 0.8to1.2 0.8 to 1.2 A-2

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

RAD study Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result Result Limits Acceptance RAD-120 Study ERW-49 1/6/2020 Ba-133 60.8 +/- 4.4 64.5 53.7-71.0 Pass ERW-49 1/6/2020 Cs-134 22.7 +/- 2.8 22.9 17.5 -25.6 Pass ERW-49 1/6/2020 Cs-137 225 +/- 8 220 198 - 244 Pass ERW-49 1/6/2020 Co-60 94.6 +/- 4.6 91.2 82.1 -103 Pass ERW-49 1/6/2020 Zn-65 331 +/- 13 298 268 - 348 Pass ERDW-51 1/6/2020 Gr. Alpha 52.3 +/- 2.4 58.9 30.8 - 73.3 Pass ERDW-51 1/6/2020 Gr. Beta 19.9+/-1.0 21.0 12.6 - 29.1 Pass ERDW-53 1/6/2020 Ra-226 12.8 +/- 0.5 17.4 12.9 -19.9 Failb ERDW-53 1/6/2020 Ra-228 7.13+/-0.9 7.95 5.06 -10.1 Pass ERDW-53 1/6/2020 Uranium 63.8 +/- 1.0 68.2 55.7 - 75.0 Pass ERW-55 1/6/2020 H-3 18,200 +/- 408 17,800 15,600 - 19,600 Pass RAD-121 Study ERDW-1034 4/6/2020 Ra-226 17.8 +/- 0.5 18.4 13.7 - 21.0 Pass ERDW-1034 4/6/2020 Ra-228 6.30 +/- 0.86 5.81 3.56 - 7.64 Pass ERDW-1034 4/6/2020 Uranium 18.7+/-1.3 18.6 14.9 - 20.9 Pass RAD-122 Study ERW-2297 7/6/2020 Ba-133 43.8 +/- 3.4 58.6 48.6 - 64.6 Failc ERW-2297 7/6/2020 Cs-134 19.8 +/- 2.4 22.3 17.0 -25.0 Pass ERW-2297 7/6/2020 Cs-137 73.2 +/- 5.4 73.0 65.7 -83.0 Pass ERW-2297 7/6/2020 Co-60 90.0 +/- 4.0 86.1 77.5 - 97.0 Pass ERW-2297 7/6/2020 Zn-65 84.9 +/- 7.5 82.9 74.6 - 99.6 Pass ERDW-2299 7/6/2020 Gr. Alpha 40.3 +/- 2.2 52.40 27.30 - 65.6 Pass ERDW-2299 7/6/2020 Gr. Beta 19.9+/-1.0 24.3 15.0 - 32.3 Pass ERDW-2303 7/6/2020 Ra-226 8.91 +/- 0.43 10.8 8.08 - 12.5 Pass ERDW-2303 7/6/2020 Ra-228 4.79 +/- 0.80 5.42 3.28 - 7.19 Pass ERDW-2303 7/6/2020 Uranium 27.7 +/- 0.9 29.3 23.7 - 32.5 Pass ERW-2305 7/6/2020 H-3 21,100 +/-400 20,300 17,800 - 22,300 Pass ERW-2301 7/6/2020 1-131 27.8+/-1.2 26.1 21.7 - 30.8 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resource Associates (ERA).

b Ra-226 was slightly below the lower limit of the study. The reported value was the mean of two results (12.5 & 13.0).

The sample was re-run in duplicate and both results, 15.6 and 13.8 pCi/L, were within the acceptance band.

c Ba-133 was below the lower acceptable limit of the study. No cause for the failure could be identified. Going forward gamma results will be monitored to see if any trend develops.

A-3

TABLE A-2. lnterlaboratory Comparison Crosscheck program, New York Department of Health (ELAP)a.

Concentration (pCi/L)

Lab Code Date Analysis Laboratory Assigned Acceptance Result Value Limits Acceptance Shipment 437R NYW-3307 9/15/2020 H-3 11,500 +/- 465 11,208 9760 - 12,300 Pass NYW-3331 9/15/2020 Gross Alpha 43.7 +/- 2.5 64.9 34.0 - 80.4 Pass NYW-3331 9/15/2020 Gross Beta 11.1 +/- 1.1 8.85 3.62 - 17.4 Pass NYW-3335 9/15/2020 1-131 14.1 +/- 1.4 12.6 10.3-16.0 Pass NYW-3333 9/15/2020 Ra-226 2.24 +/- 0.27 2.63 2.06 - 3.44 Pass NYW-3333 9/15/2020 Ra-228 4.91 +/- 1.12 5.41 3.27-7.18 Pass NYW-3333 9/15/2020 Uranium 42.8 +/- 1.94 37.1 30.1 -41.0 Failb NYW-3337 9/15/2020 Co-60 46.4 +/- 3.8 42.3 38.1 - 49.2 Pass NYW-3337 9/15/2020 Zn-65 133 +/- 9 116 104 - 138 Pass NYW-3337 9/15/2020 Ba-133 49.5 +/-4.1 46.4 38.0 - 51.6 Pass NYW-3337 9/15/2020 Cs-134 32.5 +/- 3.1 33.0 26.0 - 36.3 Pass NYW-3337 9/15/2020 Cs-137 147 +/- 7 134 121 - 150 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by the New York Department of Health Laboratory Approval Program(NY ELAP).

b Lab passed all ERA and MAPEP studies foruranium in 2020.(See tables A-1, A-7 and A-8) Uncertainty overlapped upper acceptance limit. Lab will continue to monitor results going forward for trends.

A-4

TABLE A-3. Thermoluminescent Dosimetry, (TLD, CaS04: Dy Cards).

8 mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc.

Group 1 2020-1 10/28/2020 Spike 1 172.0 180.0 0.05 2020-1 10/28/2020 Spike 2 172.0 174.5 0.01 2020-1 10/28/2020 Spike 3 172.0 174.3 0.01 2020-1 10/28/2020 Spike 4 172.0 174.0 0.01 2020-1 10/28/2020 Spike 5 172.0 167.1

-0.03 2020-1 10/28/2020 Spike 6 172.0 161.9

-0.06 2020-1 10/28/2020 Spike 7 172.0 167.9

-0.02 2020-1 10/28/2020 Spike 8 172.0 171.0

-0.01 2020-1 10/28/2020 Spike 9 172.0 170.7

-0.01 2020-1 10/28/2020 Spike 10 172.0 170.1

-0.01 2020-1 10/28/2020 Spike 11 172.0 173.8 0.01 2020-1 10/28/2020 Spike 12 172.0 178.3 0.04 2020-1 10/28/2020 Spike 13 172.0 178.2 0.04 2020-1 10/28/2020 Spike 14 172.0 171.9 0.00 2020-1 10/28/2020 Spike 15 172.0 190.4 0.11 2020-1 10/28/2020 Spike 16 172.0 170.9

-0.01 2020-1 10/28/2020 Spike 17 172.0 183.3 0.07 2020-1 10/28/2020 Spike 18 172.0 170.6

-0.01 2020-1 10/28/2020 Spike 19 172.0 164.9

-0.04 2020-1 10/28/2020 Spike 20 172.0 175.7 0.02 Mean (Spike 1-20) 173.5 0.01 Passd Standard Deviation (Spike 1-20) 6.5 0.04 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N 13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

b Reported dose was converted from exposure (R) to Air Kerma (cGy) using a conversion of 0.876. Conversion from air kerma to ambient dose equivalent for Cs-137 at the reference dose point H*(1 O)Ka = 1.20. mrem/cGy = 1000.

c Performance Quotient (P) is calculated as ((reported dose - conventionally true value) +conventionally true value) where the conventionally true value is the delivered dose.

d Acceptance is achieved when neither the absolute value of the mean of the P values, nor the standard deviation of the P values exceed 0.15.

A-5

TABLE A-3. Thermoluminescent Dosimetry, (TLD, CaS04: Dy Cards).

8 mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc.

Group 2 2020-2 10/28/2020 Spike 21 114.0 117.3 0.03 2020-2 10/28/2020 Spike 22 114.0 103.3

-0.09 2020-2 10/28/2020 Spike 23 114.0 106.2

-0.07 2020-2 10/28/2020 Spike 24 114.0 110.1

-0.03 2020-2 10/28/2020 Spike 25 114.0 114.9 0.01 2020-2 10/28/2020 Spike 26 114.0 115.5 0.01 2020-2 10/28/2020 Spike 27 114.0 110.4

-0.03 2020-2 10/28/2020 Spike 28 114.0 111.7

-0.02 2020-2 10/28/2020 Spike 29 114.0 111.3

-0.02 2020-2 10/28/2020 Spike 30 114.0 113.1

-0.01 2020-2 10/28/2020 Spike 31 114.0 116.4 0.02 2020-2 10/28/2020 Spike 32 114.0 111.8

-0.02 2020-2 10/28/2020 Spike 33 114.0 112.6

-0.01 2020-2 10/28/2020 Spike 34 114.0 105.7

-0.07 2020-2 10/28/2020 Spike 35 114.0 104.5

-0.08 2020-2 10/28/2020 Spike 36 114.0 103.6

-0.09 2020-2 10/28/2020 Spike 37 114.0 104.4

-0.08 2020-2 10/28/2020 Spike 38 114.0 104.5

-0.08 2020-2 10/28/2020 Spike 39 114.0 106.4

-0.07 2020-2 10/28/2020 Spike 40 114.0 107.7

-0.06 Mean (Spike 21-40) 109.6

-0.04 Pass ct Standard Deviation (Spike 21-40) 4.6 0.04 Pass ct a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

b Reported dose was converted from exposure (R) to Air Kerma (cGy) using a conversion of 0.876. Conversion from air kerma to ambient dose equivalent for Cs-137 at the reference dose point H*(10)Ka = 1.20. mrem/cGy = 1000.

c Performance Quotient (P) is calculated as ((reported dose - conventionally true value) +conventionally true value) where the conventionally true value is the delivered dose.

d Acceptance is achieved when neither the absolute value of the mean of the P values, nor the standard deviation of the P values exceed 0.15.

A-6

TABLE A-4. lntralaboratory "Spiked" Samples Lab Codeb SPW-481 SPW-110 W-041620 W-041620 W-042020 W-042020 SPW-190 SPW-205 SPW-217 SPW-270 SPW-288 W-021220 W-021220 SPW-396 W-022420 W-022420 SPW-716 W-022820 W-022820 SPW-532 W-030420 W-030420 W-031020 W-031020 SPW-711 SPW-825 SPW-774 W-031820 W-031820 W-032520 W-032520 SPW-877 SPW-925 SPW-859 W-040320 W-040320 SPDW-1009 SPDW-1009 SPW-1033 W-040920 W-040920 SPW-1145 SPW-1186 Date 1/1/2020 1/16/2020 4/29/2016 4/29/2016 4/29/2016 4/29/2016 1/23/2020 1/28/2020 1/31/2020 2/7/2020 2/11/2020 4/29/2016 4/29/2016 2/14/2020 4/29/2016 4/29/2016 2/26/2020 4/29/2016 4/29/2016 2/28/2020 4/29/2016 4/29/2016 4/29/2016 4/29/2016 3/12/2020 3/12/2020 3/18/2020 4/29/2016 4/29/2016 4/29/2016 4/29/2016 3/31/2020 3/23/2020 3/27/2020 4/29/2016 4/29/2016 4/8/2020 4/8/2020 4/9/2020 4/29/2016 4/29/2016 4/15/2020 4/17/2020 Analysis Ra-226 H-3 Cs-134 Cs-137 Cs-134 Cs-137 H-3 Sr-90 H-3 H-3 Ra-228 Cs-134 Cs-137 H-3 Cs-134 Cs-137 Ra-226 Cs-134 Cs-137 H-3 Cs-134 Cs-137 Cs-134 Cs-137 H-3 Ra-226 H-3 Cs-134 Cs-137 Cs-134 Cs-137 Ra-228 Ra-226 H-3 Cs-134 Cs-137 Gr. Alpha Gr. Beta H-3 Cs-134 Cs-137 Ra-228 H-3 Concentration a Laboratory results 2s,n=1c 10.4+/-0.3 2,101 +/- 154 35.7 +/- 8.8 75.0 +/- 6.6 40.6 +/- 10.2 71.2 +/- 7.0 2,058 +/- 153 17.6+/-1.2 2,005 +/- 152 2,153 +/- 157 13.1+/-1.7 39.3 +/- 18.9 73.9 +/- 15.8 2,298 +/- 160 33.4 +/- 10.5 75.6 +/- 7.8 11.3 +/- 0.4 34.9 +/- 11.6 82.9 +/- 8.5 2,054 +/- 153 29.7 +/- 9.6 74.2 +/- 7.3 41.6+/-17.8 78.6 +/- 14.3 2,083 +/- 154 12.4 +/- 0.4 2,021 +/- 151 29.7 +/- 10.6 75.5 +/- 9.2 36.4 +/- 9.2 74.9 +/- 7.0 13.0 +/- 2.0 10.7 +/- 0.4 2,065 +/- 153 38.1 +/- 10.3 78.6 +/- 7.5 11.5 +/- 0.9 22.0 +/- 1.0 2,041 +/- 153 34.3 +/- 9.4 77.9 +/- 8.0 14.3 +/- 2.0 1,972+/-151 Known Activity 12.3 2,110 36.2 71.9 36.2 71.9 2,110 17.9 2,110 2,110 14.9 36.2 71.9 2,110 36.2 71.9 12.3 36.2 71.9 2,110 36.2 71.9 36.2 71.9 2,110 12.3 2,110 36.2 71.9 36.2 71.9 14.9 12.3 2,110 36.2 71.9 18.7 26.1 2,110 36.2 71.9 14.9 2,110 Control Limitsd 8.6 - 16.0 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 14.3 - 21.5 1,688 - 2,532 1,688 - 2,532 10.4 - 19.3 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 8.6 - 16.0 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 8.6 - 16.0 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 29.0 - 43.4 57.5 - 86.3 10.4 - 19.3 8.6 - 16.0 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 9.4 -28.1 20.9 - 31.3 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 10.4 - 19.3 1,688 - 2,532 Ratio Acceptance Lab/Known Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 0.85 1.00 0.99 1.04 1.12 0.99 0.98 0.99 0.95 1.02 0.88 1.09 1.03 1.09 0.92 1.05 0.92 0.96 1.15 0.97 0.82 1.03 1.15 1.09 0.99 1.01 0.96 0.82 1.05 1.01 1.04 0.88 0.87 0.98 1.05 1.09 0.61 0.84 0.97 0.95 1.08 0.96 0.93 a Liquid sample results are reported in pCi/Liter, air filters ( pCi/m3), charcoal (pCilcharcoal canister), and solid samples (pCilkg).

b Laboratory codes: W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

d Acceptance criteria are listed in Attachment A of this report.

A-7

TABLE A-4. lntralaboratory "Spiked" Samples Lab Codeb SPW-1284 SPW-1745 W-042220 W-042220 W-042420 W-042420 W-043020 W-043020 SPW-1327 W-050520 W-050520 SPW-1394 W-050720 W-050720 SPW-1500 W-052020 W-052020 SPW-1613 W-052620 W-052620 SPW-2061 W-052620 W-052620 SPW-1741 SPW-1824 SPW-1853 W-061120 W-061120 SPW-1982 SPW-2038 SPW-2116 SPW-2173 SPW-2328 SPW-2458 SPW-2556 SPW-2558 SPW-2558 SPW-2640 SPW-2778 SPW-2797 SPW-2852 Date 4/24/2020 4/24/2020 4/29/2016 4/29/2016 4/29/2016 4/29/2016 4/29/2016 4/29/2016 5/1/2020 4/29/2016 4/29/2016 51512020 4/29/2016 4/29/2016 5/18/2020 4/29/2016 4/29/2016 512212020 4/29/2016 4/29/2016 5/21/2020 4/29/2016 4/29/2016 512712020 6/3/2020 6/4/2020 4/29/2016 4/29/2016 6/12/2020 6/18/2020 6/25/2020 7/1/2020 7/10/2020 7/16/2020 712712020 7/6/2020 7/6/2020 7/31/2020 8/7/2020 6/22/2020 8/11/2020 Analysis H-3 Ra-226 Cs-134 Cs-137 Cs-134 Cs-137 Cs-134 Cs-137 H-3 Cs-134 Cs-137 Sr-90 Cs-134 Cs-137 Ra-228 Cs-134 Cs-137 H-3 Cs-134 Cs-137 Ra-226 Cs-134 Cs-137 H-3 H-3 H-3 Cs-134 Cs-137 H-3 H-3 H-3 H-3 H-3 H-3 Sr-90 Gr. Alpha Gr. Beta H-3 H-3 Ra-226 Ra-228 Concentration 8

Laboratory results 2s, n=1 c 2,015+/-153 11.9+/-0.3 33.7 +/- 9.2 74.9 +/- 6.6 33.3 +/- 10.8 73.7 +/- 8.5 33.7 +/- 15.7 72.5 +/- 7.1 2,071 +/- 153 31.1+/-11.9 73.2 +/- 8.3 18.1+/-1.1 39.9 +/- 2.0 75.2 +/- 14.3 13.8 +/- 1.9 33.1+/-1.2 80.8 +/- 8.3 1,953 +/- 149 31.0 +/- 9.2 74.6 +/- 7.5 10.4 +/- 0.3 33.6 +/- 12.8 69.2 +/- 7.7 1,925 +/- 150 1,971+/-151 2,027 +/- 153 39.8 +/- 21.0 79.3 +/- 13.5 2,065 +/- 154 2,012+/-154 2,051 +/- 159 2,010 +/- 154 1,924+/-151 1,932+/-151 16.8+/-1.1 29.9 +/- 2.1 20.0 +/- 1.0 1,984 +/- 154 1,936+/-151 10.4 +/- 0.3 10.2+/-1.6 Known Activity 2,110 12.3 36.2 71.9 36.2 71.9 36.2 71.9 2,110 36.2 71.9 17.9 36.2 71.9 14.9 36.2 71.9 2,110 36.2 71.9 12.3 36.2 71.9 2,110 2, 110 2,110 36.2 71.9 2,110 2, 110 2,110 2,110 2,110 2, 110 17.9 58.9 21.0 2,110 2, 110 12.3 12.5 Control Limitsd 1,688 - 2,532 8.6 - 16.0 29.0 - 43.4 57.5 - 86.3 29.0 - 43.4 57.5 - 86.3 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 14.3 - 21.5 29.0 - 43.4 57.5 - 86.3 10.4 - 19.3 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 8.6 -16.0 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 1,688 - 2,532 1,688 - 2,532 29.0 - 43.4 57.5 - 86.3 1,688 - 2,532 1,688 - 2,532 1,688 - 2,532 1,688 - 2,532 1,688 - 2,532 1,688 - 2,532 14.3-21.5 29.5 - 88.4 16.8 - 25.2 1,688 - 2,532 1,688 - 2,532 8.6 -16.0 8.7-16.2 Ratio Acceptance Lab/Known Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 0.95 0.97 0.93 1.04 0.92 1.03 0.93 1.01 0.98 0.86 1.02 1.01 1.10 1.05 0.93 0.91 1.12 0.93 0.86 1.04 0.85 0.93 0.96 0.91 0.93 0.96 1.10 1.10 0.98 0.95 0.97 0.95 0.91 0.92 0.94 0.51 0.95 0.94 0.92 0.85 0.82 a Liquid sample results are reported in pCi/Liter, air filters ( pCi/m3), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

b Laboratory codes : W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

d Acceptance criteria are listed in Attachment A of this report.

A-8

TABLE A-4. lntralaboratory "Spiked" Samples Concentration*

Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPW-2854 8/14/2020 H-3 1,927 +/- 153 2,110 1,688 - 2,532 Pass 0.91 SPW-2890 8/4/2020 Ra-226 11.6 +/- 0.4 12.3 8.6 -16.0 Pass 0.95 SPW-3013 8/24/2020 H-3 2,005 +/- 153 2,110 1,688 - 2,532 Pass 0.95 SPW-3053 8/28/2020 H-3 1,904+/-149 2,110 1,688 - 2,532 Pass 0.90 SPW-3123 8/19/2020 Ra-226 10.4 +/- 0.3 12.3 8.6 -16.0 Pass 0.85 SPW-3447 9/3/2020 Ra-226 9.8 +/- 0.3 12.3 8.6 -16.0 Pass 0.80 SPW-3241 9/11/2020 H-3 1,952 +/- 154 2,110 1,688 - 2,532 Pass 0.93 SPW-3425 9/23/2020 Ra-228 10.7+/-1.6 12.3 8.6 -16.0 Pass 0.87 SPW-3412 9/25/2020 H-3 2,099 +/- 155 2,110 1,688 - 2,532 Pass 0.99 SPW-4131 9/30/2020 Ra-226 13.2 +/- 0.4 12.3 8.6 -16.0 Pass 1.07 SPW-3482 10/2/2020 H-3 1,984 +/- 154 2,110 1,688 - 2,532 Pass 0.94 SPW-3624 10/9/2020 H-3 1,924 +/- 152 2,110 1,688 - 2,532 Pass 0.91 SPW-3794 10/16/2020 H-3 2,109 +/- 156 2,110 1,688 - 2,532 Pass 1.00 SPW-3836 10/20/2020 Sr-90 16.8+/-1.1 17.9 14.3 - 21.5 Pass 0.94 SPW-4043 10/23/2020 H-3 1893.4 +/- 148.8 2,110 1,688 - 2,532 Pass 0.90 SPW-4179 10/28/2020 Ra-228 15.4+/-2.4 12.1 8.5 -15.7 Pass 1.27 SPW-4422 10/30/2020 Ra-226 12.3 +/- 0.3 12.3 8.6 -16.0 Pass 1.00 SPW-4234 11/11/2020 H-3 2,008 +/- 154 2,110 1,688 - 2,532 Pass 0.95 SPW-4634 11/23/2020 Ra-226 11.4 +/- 0.3 12.3 8.6 -16.0 Pass 0.93 SPW-4509 12/4/2020 H-3 1,873 +/- 149 2,110 1,688 - 2,532 Pass 0.89 SPW-4625 12/18/2020 H-3 1,940 +/- 152 2, 110 1,688 - 2,532 Pass 0.92 SPW-4741 12/18/2020 Ra-226 12.5 +/- 0.4 12.3 8.6 -16.0 Pass 1.02

Liquid sample results are reported in pCi/Liter, air filters ( pCi/m3), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

b Laboratory codes : W & SPW (Water), Ml (milk}, AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

d Acceptance criteria are listed in Attachment A of this report.

A-9

TABLE A-5. lntralaboratory "Blank" Samples Concentration*

Lab Codeb Sample Date Analysis 0

Laboratory results (4.66cr)

Acceptance Type LLD Activity Criteria (4.66 cr)

SPW-480 Water 1/1/2020 Ra-226 0.03 0.12+/-0.02 2

SPW-93 Water 1/7/2020 Gr. Alpha 0.35 0.47 +/- 0.29 2

SPW-93 Water 1/7/2020 Gr. Beta 0.74 0.18 +/- 0.53 4

SPW-109 Water 1/16/2020 H-3 157

-6 +/- 73 200 SPW-154 Water 1/16/2020 1-131 0.47

-0.22 +/- 0.21 SPW-189 Water 1/23/2020 H-3 158 0 +/- 73 200 SPW-204 Water 1/28/2020 Sr-89 0.64

-0.16 +/-0.50 5

SPW-204 Water 1/28/2020 Sr-90 0.54 0.11 +/- 0.27 1

SPW-216 Water 1/31/2020 H-3 156 86 +/- 78 200 SPW-269 Water 21712020 H-3 153 79 +/- 80 200 SPW-287 Water 2/11/2020 Ra-228 0.81 1.49 +/- 0.53 2

SPW-395 Water 2/14/2020 H-3 154 46 +/- 75 200 SPW-463 Water 2/25/2020 1-131 0.16 0.02 +/- 0.09 1

SPW-715 Water 2/26/2020 Ra-226 0.01 0.17 +/- 0.01 2

SPW-531 Water 2/28/2020 H-3 156 44 +/- 75 200 SPW-710 Water 3/12/2020 H-3 157

-16 +/- 72 200 SPW-824 Water 3/12/2020 Ra-226 0.03 0.15+/-0.03 2

SPW-773 Water 3/18/2020 H-3 151 76 +/- 76 200 SPW-876 Water 3/31/2020 Ra-228 0.88 0.57 +/- 0.47 2

SPW-924 Water 3/23/2020 Ra-226 0.04 0.18 +/- 0.03 2

SPW-1032 Water 4/9/2020 H-3 157 68 +/- 77 200 SPW-1144 Water 4/15/2020 Ra-228 0.89 0.03 +/- 0.42 2

SPW-1185 Water 4/17/2020 H-3 158 8 +/- 74 200 SPW-1283 Water 4/24/2020 H-3 156 10 +/- 75 200 SPW-1744 Water 4/24/2020 Ra-226 0.03

-0.01 +/- 0.03 2

SPW-1326 Water 5/1/2020 H-3 153 67 +/- 75 200 SPW-1393 Water 5/5/2020 Sr-89 0.66 0.11 +/- 0.44 5

SPW-1393 Water 5/5/2020 Sr-90 0.63

-0.27 +/- 0.26 1

SPW-1499 Water 5/18/2020 Ra-228 0.88 0.03 +/- 0.41 2

SPW-1541 Water 5/19/2020 1-131 0.20 0.00 +/- 0.11 1

SPW-2060 Water 5/21/2020 Ra-226 0.03

-0.01 +/- 0.02 2

SPW-1612 Water 5/22/2020 H-3 153 91 +/- 76 200 SPW-1740 Water 5/27/2020 H-3 158

-26 +/- 71 200 SPW-1823 Water 6/3/2020 H-3 157 18 +/- 74 200 SPW-1852 Water 6/4/2020 H-3 159 33 +/- 76 200 SPW-1981 Water 6/12/2020 H-3 149 52 +/- 77 200 SPW-2037 Water 6/18/2020 H-3 156 101 +/- 81 200 SPW-2115 Water 6/25/2020 H-3 158 56 +/- 86 200

Liquid sample results are reported in pCi/Liter, air filters ( pCi/m 3), charcoal (pCilcharcoal canister}, and solid samples (pCi/g).

b Laboratory codes : W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

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

d Activity reported is a net activity result.

A-10

TABLE A-5. lntralaboratory "Blank" Samples Concentration*

Lab Codeb Sample Date Analysisc Laboratory results (4.66a)

Acceptance Type LLD Activity Criteria (4.66 a)

SPW-2172 Water 7/1/2020 H-3 159

-15 +/- 75 200 SPW-2327 Water 7/10/2020 H-3 158 50 +/- 77 200 SPW-2457 Water 7/16/2020 H-3 159

-46 +/- 71 200 SPW-2555 Water 712712020 Sr-89 0.48 0.18 +/- 0.40 5

SPW-2555 Water 7/27/2020 Sr-90 0.54 0.03 +/- 0.25 1

SPW-2557 Water 71612020 Gr. Alpha 0.37 0.25 +/- 0.28 2

SPW-2557 Water 71612020 Gr. Beta 0.75

-0.23 +/- 0.52 4

SPW-2639 Water 7/31/2020 H-3 158 80 +/- 81 200 SPW-2777 Water 8/7/2020 H-3 157 0 +/- 74 200 SPW-2796 Water 6/22/2020 Ra-226 0.03

-0.02 +/- 0.03 2

SPW-2851 Water 8/11/2020 Ra-228 0.85 0.44 +/- 0.45 2

SPW-2853 Water 8/14/2020 H-3 158 18 +/- 77 200 SPW-2880 Water 8/18/2020 1-131 0.42

-0.04 +/- 0.22 1

SPW-2889 Water 8/4/2020 Ra-228 0.05 0.13 +/- 0.11 2

SPW-3012 Water 8/24/2020 H-3 159 59 +/- 77 200 SPW-3052 Water 8/28/2020 H-3 155 46 +/- 75 200 SPW-3122 Water 9/3/2020 Ra-226 0.03 0.20 +/- 0.03 2

SPW-3240 Water 9/11/2020 H-3 161 3 +/- 78 200 SPW-3446 Water 9/3/2020 Ra-226 0.01 0.12 +/-0.02 2

SPW-3424 Water 9/23/2020 Ra-228 0.85 0.81 +/- 0.48 2

SPW-3411 Water 9/25/2020 H-3 158 82 +/- 78 200 SPW-4130 Water 9/30/2020 Ra-226 0.04 0.01 +/- 0.04 2

SPW-3481 Water 10/2/2020 H-3 154 63 +/- 80 200 SPW-3623 Water 10/9/2020 H-3 156 57 +/- 81 200 SPW-3793 Water 10/16/2020 H-3 157 3 +/- 73 200 SPW-3835 Water 10/20/2020 Sr-89 0.55

-0.10 +/-0.43 5

SPW-3835 Water 10/20/2020 Sr-90 0.59 0.09 +/- 0.28 1

SPW-4042 Water 10/23/2020 H-3 155

-6 +/- 72 200 SPW-4178 Water 10/28/2020 Ra-228 1.04 0.33 +/- 0.52 2

SPW-4421 Water 10/30/2020 Ra-226 0.03 0.07 +/- 0.03 2

SPW-4233 Water 11/11/2020 H-3 155 78 +/- 79 200 SPW-4356 Water 11/20/2020 H-3 157 52 +/- 76 200 SPW-4633 Water 11/23/2020 Ra-226 0.05 0.04 +/- 0.11 2

SPW-4508 Water 12/4/2020 H-3 159

-68 +/- 69 200 SPW-4624 Water 12/18/2020 H-3 160 8 +/- 77 200 SPW-4740 Water 12/18/2020 Ra-226 0.04 0.02 +/- 0.03 2

Liquid sample results are reported in pCi/Liter, air filters ( pCi!m\\ charcoal (pCi/charcoal canister), and solid samples (pCi/g).

b Laboratory codes : W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

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

d Activity reported is a net activity result.

A-11

TABLE A-6. lntralaboratory "Duplicate" Samples Concentration*

Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance SG-20,21 1/2/2020 Pb-214 2.23 +/-0.12 1.61 +/- 0.09 1.92 +/- 0.08 Pass SG-20,21 1/2/2020 Ac-228 1.49 +/- 0.20 1.42 +/- 0.18 1.46 +/- 0.13 Pass AP-5060,5061 1/3/2020 Be-7 0.052 +/- 0.014 0.063 +/- 0.012 0.057 +/- 0.009 Pass AP-010720A,B 1/7/2020 Gr. Beta 0.023 +/- 0.004 0.022 +/- 0.004 0.022 +/- 0.003 Pass WW-72,73 1/7/2020 H-3 547 +/- 101 478 +/- 98 513 +/- 70 Pass WW-184,185 1/21/2020 H-3 265 +/- 88 311 +/- 90 288 +/- 63 Pass SWU-253,254 1/28/2020 Gr. Beta 1.73 +/- 0.58 2.10 +/- 0.62 1.92 +/- 0.42 Pass DW-20014,20015 1/29/2020 Ra-228 3.34 +/- 0.74 2.25 +/- 0.70 2.80 +/- 0.51 Pass DW-20014,20015 1/29/2020 Ra-226 1.05 +/- 0.15 0.64 +/- 0.24 0.85+/-0.14 Pass S-209,210 1/31/2020 K-40 8.28 +/- 0.20 7.95 +/- 0.42 8.12 +/- 0.23 Pass LW-383,384 1/31/2020 Gr. Beta 1.67 +/- 0.58 0.77 +/- 0.52 1.22 +/- 0.39 Pass AP-020320A,B 2/3/2020 Gr. Beta 0.021 +/- 0.004 0.024 +/- 0.004 0.023 +/- 0.003 Pass S-362,363 21712020 Pb-214 2.39+/-0.11 2.25 +/- 0.10 2.32 +/- 0.07 Pass S-362,363 21712020 Ac-228 1.84 +/- 0.18 1.95 +/-0.17 1.90 +/-0.12 Pass DW-20018,20019 21712020 Gr. Alpha 0.23 +/- 0.86 0.37 +/- 0.88 0.30 +/- 0.62 Pass DW-20018,20019 21712020 Gr. Beta 0.50 +/- 0.56 1.19 +/- 0.63 0.85 +/- 0.42 Pass DW-20026,20027 21712020 Ra-226 2.40 +/- 0.21 2.11 +/- 0.15 2.26 +/-0.13 Pass DW-20026,20027 21712020 Ra-228 2.60 +/- 0.68 1.81 +/- 0.57 2.21 +/- 0.44 Pass WW-452,453 2/17/2020 H-3 583 +/- 102 678 +/- 106 630 +/- 74 Pass DW-20031,20032 2/25/2020 Gr. Alpha 1.02 +/- 0.77 0.80 +/- 0.81 0.91 +/- 0.56 Pass DW-20031,20032 2/25/2020 Gr. Beta 1.11 +/- 0.59 1.19 +/- 0.58 1.15 +/- 0.41 Pass DW-20038,20039 3/3/2020 Ra-226 8.39 +/- 0.43 8.78 +/- 0.49 8.59 +/- 0.33 Pass DW-20038,20039 3/3/2020 Ra-228 2.81 +/- 1.00 2.31 +/- 0.86 2.56 +/- 0.66 Pass WW-752,753 3/13/2020 H-3 435 +/- 94 393 +/- 92 414 +/- 66 Pass S-868,869 3/13/2020 Pb-214 0.97 +/- 0.10 0.99 +/- 0.09 0.98 +/- 0.07 Pass S-868,869 3/13/2020 Ac-228 0.93 +/- 0.18 1.01 +/- 0.23 0.97 +/-0.15 Pass LW-977,978 3/25/2020 Gr. Beta 0.98 +/- 0.53 0.92 +/- 0.51 0.95 +/- 0.37 Pass AP-1220,1221 3/31/2020 Be-7 0.063 +/- 0.011 0.062 +/- 0.013 0.063 +/- 0.009 Pass SWT-912,913 3/31/2020 Gr. Beta 0.79 +/- 0.53 0.49 +/- 0.50 0.64 +/- 0.37 Pass AP-956,957 41212020 Be-7 0.189 +/- 0.097 0.256 +/-0.130 0.222 +/- 0.081 Pass AP-1110,1111 4/3/2020 Be-7 0.069 +/- 0.012 0.072 +/- 0.013 0.071 +/- 0.009 Pass WW-1047,1048 41712020 H-3 438 +/- 96 478 +/- 98 458 +/- 69 Pass VE-1022,1023 4/8/2020 Be-7 9.28 +/- 0.57 8.00 +/- 0.62 8.64 +/- 0.42 Pass VE-1022,1023 4/8/2020 K-40 3.89 +/- 0.67 3.94 +/- 0.73 3.92 +/- 0.49 Pass S-1199,1200 4/12/2020 Pb-214 0.77 +/- 0.07 0.98 +/- 0.08 0.88 +/- 0.05 Pass S-1199,1200 4/12/2020 Ac-228 1.09 +/- 0.15 1.18 +/- 0.17 1.14 +/- 0.11 Pass SS-1419,1420 4/14/2020 K-40 10.8 +/- 0.6 9.4 +/- 0.4 10.1+/-0.4 Pass AP-1241, 1242 4/16/2020 Be-7 0.203 +/- 0.113 0.245 +/- 0.145 0.224 +/- 0.092 Pass DW-20051,20052 4/23/2020 Ra-228 3.50 +/- 0.85 4.60 +/- 0.89 4.05 +/- 0.62 Pass DW-20051,20052 4/23/2020 Ra-226 0.80 +/-0.10 0.60 +/-0.10 0.70 +/- 0.07 Pass SS-1310,1311 4/23/2020 K-40 7,827 +/- 492 8,157 +/- 505 7,992 +/- 352 Pass LW-1375, 1376 4/29/2020 Gr. Beta 1.62 +/- 0.59 1.61 +/- 0.58 1.62 +/-0.41 Pass A-12

TABLE A-6. lntralaboratory "Duplicate" Samples Concentration a Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance F-1828,1829 412912020 K-40 1.35 +/- 0.41 0.98 +/- 0.33 1.16+/-0.27 Pass SG-1398,1399 5/5/2020 Pb-214 7.51+/-0.19 8.62 +/-0.17 8.07 +/- 0.13 Pass SG-1398, 1399 5/5/2020 Ac-228 6.80 +/- 0.31 6.77 +/- 0.27 6.79 +/- 0.21 Pass SW-1461, 1462 51712020 H-3 315 +/- 88 320 +/- 89 317 +/- 63 Pass AP-1610,1611 5/14/2020 Be-7 0.179 +/- 0.101 0.172 +/- 0.086 0.176 +/- 0.066 Pass DW-20062,20063 5/19/2020 Gr. Alpha 6.20 +/- 1.30 5.00 +/- 1.30 5.60 +/- 0.92 Pass DW-20062,20063 5/19/2020 Gr. Beta 6.09 +/- 0.77 5.51 +/- 0.72 5.80 +/- 0.53 Pass W-1805,1806 512512020 Ra-226 0.42 +/-0.16 0.24 +/-0.17 0.33 +/- 0.12 Pass F-1763,1764 5/26/2020 K-40 2.82 +/- 0.47 3.01 +/- 0.45 2.92 +/- 0.33 Pass AP-052620A,B 5/26/2020 Gr. Beta 0.014 +/- 0.003 0.016 +/- 0.003 0.015 +/- 0.002 Pass DW-20066,20067 6/1/2020 Ra-226 0.21 +/- 0.09 0.33 +/- 0.12 0.27 +/- 0.08 Pass DW-20066,20067 6/1/2020 Ra-228 0.05 +/- 0.43 0.03 +/- 0.39 0.04 +/- 0.29 Pass P-1849,1850 6/1/2020 H-3 547 +/- 102 700 +/- 108 624 +/- 74 Pass AP-1893, 1894 6/4/2020 Be-7 0.164 +/-0.080 0.251 +/- 0.140 0.208 +/- 0.081 Pass SW-1872, 1873 6/4/2020 H-3 385 +/- 94 400 +/- 95 393 +/- 67 Pass AP-052620A,B 6/8/2020 Gr. Beta 0.024 +/- 0.004 0.025 +/- 0.005 0.024 +/- 0.003 Pass WW-2025,2026 6/16/2020 H-3 318 +/- 92 320 +/- 92 319 +/- 65 Pass AP-061620A,B 6/16/2020 Gr. Beta 0.017 +/- 0.003 0.019 +/- 0.003 0.018 +/- 0.002 Pass DW-20078,20079 6/17/2020 Ra-226 0.53+/-0.11 0.50 +/- 0.10 0.52 +/- 0.07 Pass DW-20078,20079 6/17/2020 Ra-228 1.10 +/- 0.50 1.11 +/- 0.50 1.11 +/- 0.35 Pass AP-2048,2049 6/18/2020 Be-7 0.222 +/- 0.087 0.221 +/- 0.092 0.221 +/- 0.063 Pass SW-2157,2158 6/23/2020 H-3 175 +/- 86 235 +/- 89 205 +/- 62 Pass AP-062320A,B 6/23/2020 Gr. Beta 0.021 +/- 0.003 0.023 +/- 0.004 0.022 +/- 0.003 Pass AP-2136,2137 6/25/2020 Be-7 0.242 +/- 0.099 0.343 +/-0.115 0.292 +/- 0.076 Pass AP-2366,2367 6/30/2020 Be-7 0.144 +/- 0.018 0.177 +/- 0.019 0.161 +/- 0.013 Pass SWU-2180,2181 6/30/2020 H-3 105 +/- 82 199 +/- 87 152 +/- 60 Pass AP-2473,2474 7/1/2020 Be-7 0.079 +/- 0.011 0.089 +/- 0.012 0.084 +/- 0.008 Pass AP-2473,2474 7/1/2020 K-40 0.010 +/- 0.006 0.015 +/- 0.009 0.013 +/- 0.005 Pass AP-2408,2409 71212020 Be-7 0.084 +/- 0.016 0.085 +/- 0.014 0.085 +/- 0.011 Pass P-2264,2265 71612020 H-3 149 +/- 83 144 +/- 83 147 +/- 59 Pass DW-20091,20092 7/10/2020 Ra-226 0.77 +/- 0.17 0.69 +/- 0.24 0.73 +/- 0.15 Pass DW-20091,20092 7/10/2020 Ra-228 0.61 +/- 0.56 0.59 +/- 0.55 0.60 +/- 0.39 Pass SW-2450,2451 7/14/2020 H-3 410 +/- 96 487 +/- 99 448 +/- 69 Pass VE-2494,2495 7/16/2020 K-40 1.68 +/- 0.25 2.08 +/- 0.26 1.88 +/- 0.18 Pass DW-20102,20103 7/17/2020 Gr. Alpha 1.98 +/- 0.82 2.65 +/- 0.82 2.32 +/- 0.58 Pass DW-20102,20103 7/17/2020 Ra-226 0.84 +/- 0.20 0.89 +/- 0.20 0.87 +/- 0.14 Pass DW-20102,20103 7/17/2020 Ra-228 1.24 +/- 0.67 1.57 +/- 0.70 1.41+/-0.48 Pass WW-2604,2605 712012020 H-3 35,989 +/- 576 36,039 +/- 577 36,014 +/- 408 Pass SWU-2669,2670 7/28/2020 H-3 103 +/- 80 101 +/- 80 102 +/- 57 Pass SWU-2669,2670 712812020 Gr. Beta 1.49 +/- 0.56 1.05 +/- 0.51 1.27 +/- 0.38 Pass S-2711,2712 712912020 K-40 17.4 +/- 0.9 19.6+/-1.0 18.5 +/- 0.7 Pass A-13

TABLE A-6. lntralaboratory "Duplicate" Samples Concentration*

Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance WW-2799,2800 8/4/2020 H-3 471 +/- 100 437 +/- 99 454 +/- 70 Pass WW-2933,2934 8/4/2020 H-3 316 +/- 91 300 +/- 90 308 +/- 64 Pass S-2774,2775 8/4/2020 K-40 5.9 +/- 0.9 6.1 +/- 0.8 6.0 +/- 0.6 Pass WW-2912,2913 8/5/2020 H-3 176 +/- 84 226 +/- 87 201 +/- 60 Pass F-3040,3041 81712020 Gr. Beta 4.55 +/- 0.12 4.63 +/- 0.12 4.59 +/- 0.09 Pass F-3040,3041 81712020 K-40 3.58 +/- 0.42 3.32 +/- 0.41 3.45 +/- 0.29 Pass WW-2867,2868 8/12/2020 H-3 169 +/- 85 219 +/- 86 194 +/- 61 Pass VE-2842,2843 8/12/2020 K-40 3.18 +/-0.30 3.14 +/- 0.37 3.16 +/- 0.24 Pass F-2891,2892 8/14/2020 K-40 2.98 +/- 0.39 2.82 +/- 0.35 2.90 +/- 0.26 Pass VE-2954,2955 8/20/2020 Be-7 0.222 +/- 0.106 0.283 +/- 0.166 0.252 +/- 0.099 Pass VE-2954,2955 8/20/2020 K-40 4.09 +/- 0.37 3.75 +/- 0.38 3.92 +/- 0.27 Pass DW-20126,20127 8/25/2020 Ra-226 0.90 +/- 0.14 0.73 +/-0.12 0.82 +/- 0.09 Pass DW-20126,20127 8/25/2020 Ra-228 1.55 +/- 0.52 2.30 +/- 0.58 1.93 +/- 0.39 Pass LW-3154,3155 8/26/2020 Gr. Beta 1.43 +/- 0.60 1.33 +/- 0.55 1.38 +/-0.41 Pass VE-3084,3085 8/28/2020 Be-7 0.52 +/-0.12 0.48 +/- 0.07 0.50 +/- 0.07 Pass VE-3084,3085 8/28/2020 K-40 3.87 +/- 0.16 3.36 +/- 0.31 3.62 +/- 0.17 Pass SWU-3133,3134 9/1/2020 H-3 107 +/- 84 116 +/- 84 111 +/- 59 Pass VE-3208,3209 91812020 K-40 5.99 +/- 0.43 5.85 +/- 0.35 5.92 +/- 0.28 Pass VE-3187,3188 91812020 Be-7 0.50 +/-0.17 0.61 +/- 0.23 0.55 +/- 0.14 Pass VE-3187,3188 9/8/2020 K-40 4.64 +/- 0.54 4.97 +/- 0.45 4.81 +/- 0.35 Pass WW-3427,3428 9/10/2020 H-3 2,321 +/- 163 2,323 +/- 164 2,322 +/- 116 Pass DW-21033,21034 9/14/2020 Gr. Alpha 1.27 +/- 0.79 0.94 +/- 0.75 1.11 +/- 0.54 Pass DW-21033,21034 9/14/2020 Gr. Beta 1.02 +/- 0.60 1.01 +/- 0.59 1.02 +/- 0.42 Pass SG-3265,3266 9/14/2020 Pb-214 11.8 +/- 0.49 10.4 +/- 0.57 11.1 +/- 0.38 Pass SG-3265,3266 9/14/2020 Ac-228 18.8 +/- 1.27 17.3+/-1.36 18.0 +/- 0.93 Pass SG-3265,3266 9/14/2020 Gr. Alpha 28.0 +/- 4.6 33.5 +/- 4.9 30.8 +/- 3.4 Pass SG-3265,3266 9/14/2020 Gr. Beta 42.1 +/- 2.8 44.5 +/- 3.0 43.3 +/- 2.1 Pass VE-3315,3316 9/15/2020 Be-7 0.25 +/-0.10 0.28 +/- 0.16 0.27 +/- 0.09 Pass VE-3315,3316 9/15/2020 K-40 5.48 +/- 0.34 5.16 +/-0.36 5.32 +/- 0.25 Pass WW-3339,3340 9/16/2020 H-3 196 +/- 85 199 +/- 85 198 +/- 60 Pass CF-3381,3382 9/21/2020 Be-7 0.20 +/- 0.10 0.19 +/- 0.11 0.20 +/- 0.07 Pass CF-3381,3382 9/21/2020 K-40 5.94 +/- 0.30 5.72 +/- 0.29 5.83 +/- 0.21 Pass AP-092120A,B 9/21/2020 Gr. Beta 0.043 +/- 0.005 0.041 +/- 0.005 0.042 +/- 0.004 Pass F-3706,3707 9/26/2020 K-40 1.86 +/- 0.35 1.83 +/- 0.39 1.84 +/- 0.26 Pass AP-092820A,B 9/28/2020 Gr. Beta 0.021 +/- 0.004 0.023 +/- 0.004 0.022 +/- 0.003 Pass XW-3620,3621 9/30/2020 Sr-89 11,760 +/- 140 12,487 +/- 133 12,124 +/-97 Pass XW-3620,3621 9/30/2020 Sr-90 2,287 +/- 45 2,831 +/- 50 2,559 +/- 34 Pass XW-3620,3621 9/30/2020 Fe-55 1,623 +/- 462 1,833 +/- 474 1,728 +/- 331 Pass A-14

TABLE A-6. lntralaboratory "Duplicate" Samples Concentration*

Averaged Lab Codeb Date Analysis First Result Second Result Result SW-3515,3516 10/1/2020 H-3 154 +/- 86 111 +/- 84 133 +/- 60 DW-20141,20142 10/1/2020 Ra-226 1.34 +/- 0.16 1.39+/-0.16 1.37 +/- 0.11 DW-20141,20142 10/1/2020 Ra-228 1.74 +/- 0.62 2.09 +/- 0.64 1.92 +/- 0.45 SW-3536,3537 10/5/2020 H-3 376 +/- 97 378 +/- 97 377 +/- 68 WW-3727,3728 10/8/2020 H-3 152 +/- 82 190 +/- 84 171 +/- 59 VE-3748,3749 10/12/2020 K-40 3.07 +/- 0.25 2.88 +/- 0.26 2.98 +/- 0.18 VE-3769,3770 10/12/2020 Be-7 0.80 +/- 0.31 0.51 +/- 0.15 0.66 +/-0.17 VE-3769,3770 10/12/2020 K-40 5.69 +/- 0.61 5.79 +/- 0.39 5.74 +/- 0.36 WW-4092,4093 10/13/2020 H-3 6,484 +/- 252 6,275 +/- 248 6,380 +/- 177 WW-3838,3839 10/14/2020 H-3 313 +/- 90 263 +/- 88 288 +/- 63 WW-4394,4395 11/3/2020 H-3 161 +/- 83 199 +/- 85 180 +/- 60 WW-4587,4588 11/4/2020 H-3 6,468 +/- 252 6,638 +/- 255 6,553 +/- 179 WW-4524,4525 11/5/2020 H-3 160 +/- 86 131 +/- 84 145 +/- 60 VE-4415,4416 11/24/2020 Be-7 0.28 +/- 0.08 0.22 +/- 0.07 0.25 +/- 0.05 VE-4415,4416 11/24/2020 K-40 2.25 +/- 0.21 2.20 +/- 0.19 2.23 +/- 0.14 AP-4845,4846 12/31/2020 Be-7 0.07 +/- 0.01 0.06 +/- 0.02 0.06 +/- 0.01 Note: Duplicate analyses are performed on every twentieth sample received. 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 or pCi/m3), food products, vegetation, soil and sediment (pCi/g).

Acceptance Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass b AP (Air Particulate), AV (Aquatic Vegetation), BS (Bottom Sediment), CF (Cattle Feed), CH (Charcoal Canister),

OW (Drinking Water), E (Egg), F (Fish), G (Grass), LW (Lake Water), Ml (Milk), P (Precipitation), PM (Powdered Milk),

S (Solid), SG (Sludge), SO (Soil), SS (Shoreline Sediment), SW (Surface Water), SWT (Surface Water Treated),

SWU (Surface Water Untreated), VE (Vegetation), W (Water), WW (Well Water).

A-15

TABLE A-7. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP).

Concentration 8

Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-664 2/1/2020 Gross Alpha 2.26 +/- 0.14 1.24 0.37 - 2.11 Fail d MAAP-664 2/1/2020 Gross Beta 2.40 +/- 0.07 2.00 1.00 - 3.00 Pass MAW-536 2/1/2020 Gross Alpha 0.86 +/- 0.06 1.03 0.31 -1.75 Pass MAW-536 2/1/2020 Gross Beta 3.79 +/- 0.07 4.24 2.12 - 6.36 Pass MAS0-662 2/1/2020 Cs-134 955 +/- 9 1114 780 - 1448 Pass MAS0-662 2/1/2020 Cs-137 1089 +/- 12 1020 714 - 1326 Pass MAS0-662 2/1/2020 Co-57 1106 +/- 8 1071 750 - 1392 Pass MAS0-662 2/1/2020 Co-60 0.33 +/- 1.26 0

NAC Pass MAS0-662 2/1/2020 Mn-54 1022 +/- 27 945 662 - 1229 Pass MAS0-662 2/1/2020 Zn-65 842 +/- 17 751 526 - 976 Pass MAS0-662 2/1/2020 K-40 710 +/- 42 625 438 - 813 Pass MAW-534 2/1/2020 1-129 0.81 +/- 0.09 1.001

0. 701 - 1.301 Pass MAW-599 2/1/2020 H-3 202 +/- 9 196 137 - 255 Pass MAW-599 2/1/2020 Am-241 0.41 +/- 0.09 0.547 0.383 - 0.711 Pass MAW-599 2/1/2020 Cs-134 16.1 +/- 0.3 18.5 13.0 - 24.1 Pass MAW-599 2/1/2020 Cs-137 11.5 +/- 0.4 11.3 7.9 - 14.7 Pass MAW-599 2/1/2020 Co-57 20.0 +/- 0.30 19.7 13.8 - 25.6 Pass MAW-599 2/1/2020 Co-60 10.6 +/- 0.2 10.6 7.4 - 13.8 Pass MAW-599 2/1/2020 Mn-54 20.5 +/- 0.4 19.6 13.7 - 25.5 Pass MAW-599 2/1/2020 Zn-65 24.1 +/-0.70 22.2 15.5 - 28.9 Pass MAW-599 2/1/2020 K-40 0.57 +/- 1.54 0

NAC Pass MAW-599 2/1/2020 Fe-55 13.3 +/- 12.2 17.8 12.5 - 23.1 Pass MAW-599 2/1/2020 Ni-63 9.72 +/- 0.43 11.1 7.8 - 14.4 Pass MAW-599 2/1/2020 Sr-90 0.07 +/- 0.18 0

NA c Pass MAW-599 2/1/2020 Tc-99 3.41 +/- 0.31 3.63 2.54 - 4.72 Pass MAW-599 2/1/2020 Ra-226 0.56 +/- 0.06 0.365 0.256 - 0.475 Fail e MAW-599 2/1/2020 Pu-238 0.69 +/- 0.08 0.94 0.66 - 1.22 Pass MAW-599 2/1/2020 Pu-239/240 0.48 +/- 0.07 0.737 0.516 - 0.958 Fail 1 MAW-599 2/1/2020 U-234 1.04 +/- 0.08 0.97 0.68 - 1.26 Pass MAW-599 2/1/2020 U-238 1.02 +/- 0.08 0.95 0.67 - 1.24 Pass A-16

TABLE A-7. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP).

Concentration" Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAVE-668 2/1/2020 Cs-134 3.51 +/- 0.22 3.82 2.67 - 4.97 Pass MAVE-668 2/1/2020 Cs-137 3.04 +/- 0.18 2.77 1.94 - 3.60 Pass MAVE-668 2/1/2020 Co-57 0.02 +/- 0.03 0

NA c Pass MAVE-668 2/1/2020 Co-60 2.92 +/- 0.08 2.79 1.95 - 3.63 Pass MAVE-668 2/1/2020 Mn-54 5.16+/-0.14 4.58 3.21 - 5.95 Pass MAVE-668 2/1/2020 Zn-65 4.36 +/- 0.16 3.79 2.65 - 4.93 Pass MAW-689 2/1/2020 Ra-226 172 +/- 1 189 132 - 246 Pass MAW-689 2/1/2020 Ra-228 65 +/- 1 75 53 - 98 Pass MAAP-3181 8/1/2020 Gross Alpha 0.45 +/- 0.06 0.528 0.158 - 0.898 Pass MAAP-3181 8/1/2020 Gross Beta 0.97 +/- 0.04 0.915 0.458 - 1.373 Pass MADW-3101 8/1/2020 Gross Alpha 0.57 +/- 0.04 0.62 0.19 -1.05 Pass MADW-3101 8/1/2020 Gross Beta 0.75 +/- 0.04 0.83 0.42 - 1.25 Pass MAS0-3179 8/1/2020 Cs-134 599 +/- 7 710 497 - 923 Pass MAS0-3179 8/1/2020 Cs-137 3.33 +/- 4.81 0

NA c Pass MAS0-3179 8/1/2020 Co-57 1145 +/- 8 1100 770 - 1430 Pass MAS0-3179 8/1/2020 Co-60 965 +/- 9 1000 700 - 1300 Pass MAS0-3179 8/1/2020 Mn-54 651 +/- 11 610 427 - 793 Pass MAS0-3179 8/1/2020 Zn-65 524 +/- 14 470 329 -611 Pass MAS0-3179 8/1/2020 K-40 684 +/- 58 622 435 - 809 Pass MAW-3175 8/1/2020 Cs-134 13.9 +/- 0.3 15.2 10.6 - 19.8 Pass MAW-3175 8/1/2020 Cs-137 15.4 +/- 0.4 14.3 10.0-18.6 Pass MAW-3175 8/1/2020 Co-57 0.10 +/-0.16 0

NA c Pass MAW-3175 8/1/2020 Co-60 12.5 +/- 0.3 12.2 8.5 - 15.9 Pass MAW-3175 8/1/2020 Mn-54 0.07 +/- 0.17 0

NA c Pass MAW-3175 8/1/2020 Zn-65 18.3 +/- 0.6 16.9 11.8 - 22.0 Pass MAW-3175 8/1/2020 K-40 1.06+/-1.65 0

NA c Pass A-17

TABLE A-7. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP).

Concentration a Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-3177 8/1/2020 Cs-134 1.28 +/- 0.05 1.83 1.28 - 2.38 MAAP-3177 8/1/2020 Cs-137 0.981 +/- 0.068 0.996 0.697 - 1.295 MAAP-3177 8/1/2020 Co-57 0.020 +/- 0.027 0

NA c MAAP-3177 8/1/2020 Co-60 1.57 +/- 0.06 1.73 1.21 - 2.25 MAAP-3177 8/1/2020 Mn-54 0.751 +/- 0.077 1.400 0.98 - 1.82 MAAP-3177 8/1/2020 Zn-65 2.07 +/- 0.15 2.00 1.40 - 2.60 MAVE-3185 8/1/2020 Cs-134 4.73 +/-0.10 4.94 3.46 - 6.42 MAVE-3185 8/1/2020 Cs-137 0.03 +/- 0.06 0

NA c MAVE-3185 8/1/2020 Co-57 7.83 +/- 0.12 6.67 4.67 - 8.67 MAVE-3185 8/1/2020 Co-60 4.41 +/- 0.10 4.13 2.89 - 5.37 MAVE-3185 8/1/2020 Mn-54 6.52 +/-0.18 5.84 4.09 - 7.59 MAVE-3185 8/1/2020 Zn-65 7.26 +/-0.19 6.38 4.47 - 8.29 a Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

b Laboratory codes as follows: MAW (water), MADW (water), MAAP (air filter), MASO (soil) and MAVE (vegetation).

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

Fail9 Pass Pass Pass Failh Pass Pass Pass Pass Pass Pass Pass d The lab utilized a MAPEP specific gross alpha/beta filter calibration as discussed in the MAPEP test instructions for MAAP-664.

Using the MAPEP specific calibration for MAAP-664 caused the bias to shift from low to high.

The subsequent MAPEP study result was acceptable. See Lab code MAAP-3101 (reference date 8/1/2020).

An investigation of the Radium-226 failure was inconclusive. Subsequent Ra-226 PT analyses were satisfactory.

See ERA RAD-121 and RAD-122 studies Table A-1 and NY ELAP shipment 437R Table A-2.

r Analysis was repeated in duplicate with acceptable results: Pu-238 (0.97 & 1.10 Bq/Kg);

Pu-239 (0.83 & 0.83 Bq/Kg). The cause of the failure could not be determined.

9 Analysis was run in duplicate. Results were (1.18 Bq/sample and 1.37 Bq/sample). The submitted result was the mean of the two results (1.28 +/- 0.05 Bq/sample).

h A data transcription error resulted in an erroneous reported value. The actual result (1.36 +/- 0.08 Bq/L) passes.

A-18

TABLE A-8. lnterlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA)*.

MRAD-30 Study Concentration a Lab Code b Date Analysis Laboratory ERA Control Result Value c Limits d Acceptance ERAP-769 3/16/2020 Am-241 71.0 74.7 53.3 - 99.6 Pass ERAP-769 3/16/2020 Cs-134 1210 1390 902 - 1700 Pass ERAP-769 3/16/2020 Cs-137 393 351 288 - 460 Pass ERAP-769 3/16/2020 Co-60 450.0 422.0 359.0 - 536 Pass ERAP-769 3/16/2020 Fe-55 1200 1260 460 - 2010 Pass ERAP-769 3/16/2020 Mn-54

< 2.4

< 50.0 0.00 - 50.0 Pass ERAP-769 3/16/2020 Zn-65 856 694 569 - 1060 Pass ERAP-769 3/16/2020 Pu-238 31.4 28.0 21.1 - 34.4 Pass ERAP-769 3/16/2020 Pu-239 43.9 40.1 30.0 - 48.4 Pass ERAP-769 3/16/2020 Sr-90 190 175 111 - 238 Pass ERAP-769 3/16/2020 U-234 56.7 56.2 41.7 - 65.9 Pass ERAP-769 3/16/2020 U-238 57.0 55.7 42.1 - 66.5 Pass ERAP-771 3/16/2020 Gross Alpha 33.4 29.3 15.3 - 48.3 Pass ERAP-771 3/16/2020 Gross Beta 68.3 66.4 40.3 - 100 Pass a Results obtained by Environmental, Inc., Midwest Laboratory (EIML) as a participant in the crosscheck program for proficiency testing administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory code ERAP (air filter). Results are reported in units of (pCi/Filter).

c The ERA Assigned values for the air filter standards are equal to 100% of the parameter present in the standard as determined by the gravimetric and/or volumetric measurements made during standard preparation as applicable.

d The acceptance limits are established per the guidelines contained in the Department of Energy (DOE) report EML-564, Analysis of Environmental Measurements Laboratory (EML) Quality Assessment Program (QAP)

Data Determination of Operational Criteria and Control Limits for Performance Evaluation Purposes or ERA's SOP for the generation of Performance Acceptance Limits.

A-19

~*L All Environmental, Inc.

"+~/"'\\I Midwest Laboratory 700 Landwehr Road* Northbrook, IL 60062-2310 phone (847) 564-0700 *fax (847) 564-4517 Appendix B Data Reporting Conventions

APPENDIX B.

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

2.0. Single Measurements Each single measurement is reported as follows:

x +/- s where:

x = value of the measurement; s = 2cr counting uncertainty (corresponding to the 95% confidence level).

In cases where the activity is less than the lower limit of detection L, it is reported as: < L, where L =the lower limit of detection based on 4.66cr 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 +/- s1 and x2 +/- s2 Reported result:

x +/- s; where x = (1/2) (x1 + x2) ands= (1/2) J s~ + si 3.2.

Individual results:

< L1, < L2 Reported result: < L, where L = lower of L1 and L2 3.3.

Individual results:

x +/- s, < L Reported result:

x +/- s if x <:: 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... x0 are defined as follows:

--~

s-

\\J~

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-1

~*L All Environmental, Inc.

'+~/"\\I Midwest Laboratory 700 Landwehr Road

Northbrook, IL 60062-2310 phone (847) 564-0700 *fax (847) 564-4517 Appendix C Maximum permissible concentrations of radioactivity in air and water above natural background in unrestricted areas

APPENDIX C Table C-1.

Maximum permissible concentrations of radioactivity in air and water above natural background in unrestricted areas 8

Air (pCi/m 3

)

Water (pCi/L)

Gross alpha 1 x 10-3 Strontium-89 8,000 Gross beta Strontium-90 500 lodine-131 b 2.8x10-1 Cesium-137 1,000 Barium-140 8,000 lodine-131 1,000 Potassium-40 c 4,000 Gross alpha 2

Gross beta 10 Tritium 1 x 10 6

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

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

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

c A natural radionuclide.

C-1

APPENDIX D

SUMMARY

OF THE LAND USE CENSUS AND REMP-GWPP DATA D-1

Appendix D Summary of the 2020 Land Use Census and REMP-GWPP Data The Duane Arnold Energy Center Land Use Census was completed during July-September 2020. All residences, milk animals, cattle, and gardens greater than 500 square feet were identified within three miles for each of the 16 meteorological sectors.

If none were identified within three-mile range, additional surveys were performed out to five miles. The 16 meteorological sectors were identified using Google Earth and digital compass rose overlay for accuracy and precision. Sample locations and information can be found in the Offsite Dose Assessment Manual (ODAM) or the Defueled Offsite Dose Assessment Manual (DODAM), Table 5-1. Both documents are published by the Nuclear Regulatory Commission (NRC) in the DAEC 2020 Annual Radiological Material Release Report, which also includes information on DAEC's decommissioning.

The 2020 Land Use Census identified 81 gardens, which is the same as in 2019, 37 fewer gardens than in 2018, and 40 fewer gardens than in 2017. Seven farmers or residents provided vegetation samples including two adjacent neighbors to DAEC, D-58 and D-57. Gardens were identified using Google Earth, Linn County GIS data, field observation, and interviewing residents.

There are no nearest resident changes. The largest municipality closest to the facility is Palo, Iowa (D-5a and D-5). In addition, the Pleasant Creek State Recreation Area has a large transient population of 50-300 people camping in RV's and tents from April to October and is identified as sample location D-4. Much of the terrain and population consists of suburban communities, rural subdivisions, farms, and a nature preserve.

There are three nearest livestock changes attributed to field observation verification.

Farmers in the WNW and ENE sectors were observed to have goats but did not provide goat milk samples. The Iowa Department of Agriculture and Land Stewardship provided a list of permitted commercial dairy farms located Benton and Linn Counties. Large commercial dairies were included in the survey, but none were located within five miles.

DAEC collected milk samples from two permitted dairy farms located in WSW and SW sectors for most of 2020. No goat milk samples were collected in 2020.

The derecho storm on August 10, 2020 caused significant property and crop damage to dairy sample locations D-110 and D-138 preventing adequate sampling in the 3rd and 4th quarter of 2020. Following the permanent defueling of the reactor in October 2020 and identified reduction in gaseous effluent matrix from the facility, milk sampling was terminated in December 2020 as a viable sampling method.

D-2

The Cedar River was surveyed by the State of Iowa Hygienic Laboratory on June 18, 2020, and September 18, 2020, for water use downstream of the DAEC to Cedar Rapids. Consistent with historical surveys, both 2020 surveys did not identify irrigation systems that withdraw water from the Cedar River to irrigate vegetable gardens or commercial crops. Recreational fishing in the Cedar River is the only identified food pathway.

The State of Iowa Hygienic Laboratory performed fish sampling on June 3, 2020, and August 14, 2020. Fish filets from smallmouth bass, northern pike, white crappie, and channel catfish were processed for off-site laboratory analysis. No DAEC by-products were identified.

Benton County Public Health Department and Linn County Public Health Department provided groundwater well permit data. In 2020, three new drinking wells were installed within three miles of the facility, but none of these new wells are impacted by plant activities or down gradient of the facility. No DAEC by-products were identified in any drinking water samples or water samples from the Cedar River.

The Groundwater Protection Program (GWPP) provides representative monitoring and characterization of radioactivity in the highest potentially exposed aquifer, verification of the accuracy of the GWPP monitoring efforts, and modeling of the subsurface.

Additionally, the GWPP is designed to mitigate radiological contaminates to groundwater and protect DAEC employees, the public, and environment. The GWPP is incorporated within REMP and includes standards set forth in Nuclear Energy Institute document, NEI 07-07. Specifically:

There are 56 monitoring wells on-site. 2020 tritium concentrations from monitoring wells range from non-detectable at less than (<) 152 pCi/L to 51,271 pCi/L, from monitoring well MW-08A (D-128A). Gross alpha values in several samples are believed to be influenced by naturally occurring radioactive materials in the environment, i.e. radon. No on-site or neighboring drinking water wells are installed in this shallow aquifer. Tritiated groundwater remains within the owner-controlled area and the shallow aquifer is undergoing mitigation in accordance with ACP 1411.35.

From January 1 to December 31, 2020, three extraction wells were in operation and are designed to remove tritiated groundwater continuously from the shallow aquifer. In addition, temporary mitigation of monitoring wells was performed at MW-08A (D-128A) and MW-23A (D-67). For specific liquid effluent release data, see the 2020 Duane Arnold Annual Radioactive Material Release Report.

The United States Nuclear Regulatory Commission, NRC, provides an informative resource for tritium. The information can be found at:

https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/tritium-radiation-fs.html D-3

As a result of the 2020 Land Use Census, adjustments were made to the MIDAS dose projection software model for changes in receptor distances. Due to continued water use surveys indicating no downstream irrigation usage of Cedar River water, the ingestion pathway for irrigated vegetables was removed from MIDAS for the 2020 dose assessment. The 2020 annual radiation dose assessment can be found in Appendix E.

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.

Updates to REMP and GWPP 2020 sampling include:

1. D-76, D-110, and D-138 sample locations were discontinued.

2. D-59 vegetation sample location added.

3. D-57, D-58, and D-72 were renamed, "Drinking Water".

D-4

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 2020 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 as per Environmental Sampling Procedure, ESP 4.5.

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 the central United States.

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 adequate for the identified receptors.

E-2

Results of the MIDAS dose calculations are displayed below.

1.) The maximum dose from tritiated groundwater and liquid radwaste waste system was to a child total body dose of 0.0328 mrem and to a child's liver organ dose of 0.0329 mrem. There were twenty liquid batch releases from the radioactive waste system and batch releases contained tritium, Manganese-54, Cobalt-60, and Cesium-137. There was a total of forty-seven liquid releases from groundwater mitigation. Of which, four releases were from the permanent mitigation system (three extraction wells) and forty-three continuous and combined releases from monitoring wells MW-08A and MW-23A.

2.) The maximum dose to air at the site boundary from noble gases released was 0.0157 mrad from gamma radiation at 481 meters towards the South-Southeast.

3.) The maximum dose to air at the site boundary from noble gases released was 0.0181 mrad beta radiation at 481 meters towards the South-Southeast.

4.) The whole-body dose equivalent to the hypothetical maximally exposed individual from noble gases was 0.0053 mrem, at 805 meters towards the West.

5.) The skin dose equivalent to the hypothetical maximally exposed individual (child) from noble gases was 0.0096 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 (excluding carbon-14) was the thyroid of a child at 805 meters towards the West, with an estimated dose equivalent of 0.00456 mrem.

7.) The hypothetical maximally exposed organ due to airborne carbon-14 was the bone of a child located 1,760 meters to the North of the site. The dose was 0.214 mrem.

Conclusion No measurable dose due to the operation of the DAEC or the DAEC ISFSI was detected by environmental TLDs in 2020. The calculated doses are below the regulatory limits stated in Appendix I to 1 OCFR50, 40CFR190, and 10 CFR 72.104.

E-3

Estimated Maximum Offsite Individual Doses for 2020 Type Age Distanc Direction Dose or Dose Equivalent Annual 10 CFR 50, Group e

(mrem)

Appendix I "Limit" (meters)

Direct Radiation None (as measured by TLDs)

Liquid Releases Whole Body Dose Child D*

SE 0.0328 mrem 3 mrem Organ Dose Child -

D*

SE 0.0329 mrem 10 mrem Liver Noble Gas Gamma Air Dose 481 SSE 0.0157 mrad 10 mrad Beta Air Dose 481 SSE 0.0181 mrad 20 mrad Whole Body All 805 w

0.00530 mrem 5 mrem Skin Child 805 w

0.00960 mrem 15 mrem Particulates & Iodines Organ Dose Child-805 w

0.00456 mrem 15 mrem Lungs Carbon 14 D*

Organ Dose Child-3,015 WNW 0.2140 mrem 15 mrem Bone There is no Appendix I limit for direct radiation. Compliance with 40 CFR 190 limits of 25 mrem whole body and 75 mrem thyroid is demonstrated in the Duane Arnold Energy Center 2020 Annual Radiological Environmental Operating Report, subsections "Ambient Radiation (TLDs)" and "ISFSI Facility Operations Monitoring".

Receptor location is aquatic pathway at Cedar River, See Offsite Dose Assessment Manual, ODAM, figure 3-2.

The following graphs are TLD trends based on distance to the facility over time.

E-4

DAEC ANNUAL ENVIRONMENTAL TLD RESULTS

'I 95~___:~~-~;-'.::==

,-=-=-~-=-=...:;:

,-=-=-=::

,-=-=-=.:.===.===============~

.==~

.==============='-

_._1Mlle

--0--Half Mlle

-e-control TLDs

-111-3 Miles i

~ 75 t-\\;'fl-l\\--iA.-~~'-41... ~-\\-,'-'-~"'""~.~~~~-~-r:.~-1< :>-~'T-l~~~-;:;:.~,--"tt!l~~---:i<---,iir"""~~

J 55 I

YEAR OBSERVED DAEC ANNUAL ENVIRONMENTAL TLD RESULTS 95.00 85.00 I 7500

~

E-5

DAEC ANNUAL ENVIRONMENTAL TLD RESULTS

--.-1 Mlle

~ Half Mile

.... 3 Miles

... control TLDs 95 i

~ 75 t-1"Tf~-\\\\-;&-~~-'-'"'"":-nl-'-..-...,.r--~~--c--.tll.~.:-:r-'-K~-+-ft~~l--d'~--":~~r----x-~~~~

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55 YEAR OBSERVED DAEC ANNUAL ENVIRONMENTAL TLD RESULTS 95.00 85.00 I 7500

~

3Ml es E-5

NG-21-0011, Submittal of 2020 Annual Radiological Environmental Operating Report

Contents

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6.0 REFERENCES

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NG-21-0011, Submittal of 2020 Annual Radiological Environmental Operating Report

Text

Subject:

1.0 INTRODUCTION

SUMMARY

6.0 REFERENCES

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SUMMARY

6.0 REFERENCES

1.0 INTRODUCTION

1.0 INTRODUCTION

SUMMARY

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