L-MT-18-029, 2017 Annual Radiological Environmental Operating Report

2017 Annual Radiological Environmental Operating Report

ML18131A071
Person / Time
Site:	Monticello
Issue date:	05/10/2018
From:	Church C Northern States Power Co, Xcel Energy
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-MT-18-029
Download: ML18131A071 (94)

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2807 West County Road 75 Monticello, MN 55362 (l Xcel Energy*

RESPONSIBLE BY NATURE 800.895.4999 xcelenergy.com May 10, 2018 L-MT-18-029 10 CFR 50, Appendix I ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Monticello Nuclear Generating Plant Docket No. 50-263 Renewed Facility Operating License No. DPR-22 2017 Annual Radiological Environmental Operating Report Pursuant to 10 CFR 50, Appendix I, Section IV.B.2, IV.B.3, IV.C and, in accordance with Monticello Nuclear Generating Plant (MNGP) Technical Specifications 5.6.1, the Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy, is submitting the Annual Radiological Environmental Operating Report, under MNGP's "Radiological Environmental Monitoring Program," for year 2017.

Summary of Commitments This letter makes no new commitments and no revisions to existing commitments.

~"k, ristopher R. Churc Site Vice President, Monticello Nuclear Generating Plant Northern States Power Company - Minnesota Enclosure cc: Administrator, Region Ill, USNRC Project Manager, Monticello, Resident Inspector, Monticello Minnesota Department of Commerce

ENCLOSURE RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM JANUARY 1 - DECEMBER 31, 2017 92 pages follow

~*, ATI

'7+'{ J-\1 Environmental, Inc.

Midwest Laboratory 700 Landwehr Road

• Northbrook, IL 60062-23 10 phone (847) 564-0700 , fax (847) 564-45 17 XCEL ENERGY CORPORATION MONTICELLO NUCLEAR GENERATING PLANT DOCKET No. 50-263 LICENSE No. DPR-22 ANNUAL REPORT TO THE UNITED STATES NUCLEAR REGULATORY COMMISSION Radiological Environmental Monitoring Program January 1 to December 31, 2017 Prepared under Contract by ENVIRONMENTAL, INC MIDWEST LABORATORY Project No. 8010 Approved:

Forrest G. Shaw Ill Quality Assurance Manager

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

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

1.0 INTRODUCTION

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

SUMMARY

................................................................................................................................. 2 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)......................... 3 3.1 Program Design and Data Interpretation ............................................................... 3 3.2 Program Description .............................................................................................. 4 3.3 Program Execution ................................................................................................ 5 3.4 Program Modifications ........................................................................................... 5 3.5 Laboratory Procedures .......................................................................................... 5 3.6 Land Use Census................................................................................................... 6 4.0 RESULTS AND DISCUSSION ............................................................................................ 8 4.1 Atmospheric Nuclear Detonations and Nuclear Accidents .................................... 8 4.2 Summary of Preoperational Data ........................................................................... 8 4.3 Program Findings ................................................................................................... 9 5.0 FIGURES AND TABLES ..................................................................................................... 13

6.0 REFERENCES

........................................................................................................................... 25 APPENDICES A Interlaboratory Comparison Program Results.................................................................... A1 B Data Reporting Conventions ............................................................................................. B-1 C Maximum Permissible Concentrations of Radioactivity in Air and Water Above Natural Background in Unrestricted Area ............................................................ C-1 D Sampling Location Maps ................................................................................................... D-1 iii iii ii

LIST OF TABLES No. Title Page 5.1 Sample Collection and Analysis Program ...................................................................... 14 5.2 Sampling Locations ........................................................................................................ 15 5.3 Missed Collections and Analyses .................................................................................. 18 5.4 Radiation Environmental Monitoring Program Summary............................................... 21 The following tables are in the Appendices:

Appendix A A-1 Interlaboratory Comparison Program Results ................................................................A1-1 A-2 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 Resources Associates, Crosscheck Program Results (EML study replacement) ...................................................................................A7-1 Attachment A: Acceptance criteria for spiked samples .................................................... A2 Appendix C C-1 Maximum Permissible Concentrations of Radioactivity in air and water above background in unrestricted areas .....................................................................C-2 iv iii ii

LIST OF FIGURES No. Title Page 5-1 Offsite Ambient Radiation (TLDs), inner versus outer ring locations .......................................... 19 5-2 Airborne Particulates; analysis for gross beta, average mean of all indicator locations versus control location .............................................................................................. 20 The following figures are located in the Appendices:

Appendix D D-1 Sample collection and analysis program: TLD locations, Inner Ring

.............................................................................................................................................D-2 D-2 Sample collection and analysis program: TLD locations, Outer Ring ..............................................................................................................................D-3 D-3 Sample collection and analysis program: TLD locations, Controls...................................................................................................................................D-4 D-4 Sample collection and analysis program: Radiation Environmental Monitoring Program, Well water and Shoreline sampling locations .........................................................................D-5 D-5 Sample collection and analysis program: TLD locations, ISFSI TLD Locations ..............................................................................................................D-6 v

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1.0 INTRODUCTION

This report summarizes and interprets results of the Radiological Environmental Monitoring Program (REMP) conducted by Environmental, Inc., Midwest Laboratory for the Monticello Nuclear Generating Plant, Monticello, Minnesota, during the period January - December, 2017. This Program monitors the levels of radioactivity in the air, terrestrial, and aquatic environments in order to assess the impact of the Plant on its surroundings.

Tabulations of the individual analyses made during the year are included in Part II of this report.

The Monticello Nuclear Generating Plant is a boiling water reactor with a nominal generating capacity of 681 MWe. It is located on the Mississippi River in Wright County, Minnesota, owned by Xcel Energy Corporation and operated by Northern States Power Co. Minnesota. Initial criticality was achieved on December 10, 1970. Full power was achieved March 5, 1971 and commercial operation began on June 30, 1971.

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2.0

SUMMARY

The Radiological Environmental Monitoring Program (REMP) is described; this program is required by the U.S. Nuclear Regulatory Commission (NRC) as well as Technical Specifications and the Offsite Dose Calculation Manual (ODCM) for the Monticello Nuclear Generating Plant. Results for the year 2017 are summarized and discussed.

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

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3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP) 3.1 Program Design and Data Interpretation The purpose of the Radiological Environmental Monitoring Program (REMP) at the Monticello Nuclear Generating Plant is to assess the impact of the Plant on its environment. For this purpose, samples are collected from the air, terrestrial, and aquatic environments and analyzed for radioactive content. In addition, ambient gamma radiation levels are monitored by thermoluminescent dosimeters (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; (4) Industrial and medical radioactive waste; and (5) Fallout from nuclear accidents.

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

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

An additional interpretive technique involves analyses for specific radionuclides present in environmental samples collected from the Plant site. The Plants monitoring program includes analyses for tritium and iodine-131. Most samples are also analyzed for gamma-emitting isotopes with results for the following groups quantified: zirconium-95, cesium-137, cerium-144, beryllium-7, and potassium-40. The first three gamma-emitting isotopes were selected as radiological impact indicators because of the different characteristic proportions in which they appear in the fission product mix produced by a nuclear reactor and that produced by a nuclear detonation.

Each of the three isotopes is produced in roughly equivalent amounts by a reactor: each constitutes about 10% of the total activity of fission products 10 days after reactor shutdown. On the other hand, 10 days after a nuclear explosion, the contributions of zirconium-95, cerium-144, and cesium-137 to the activity of the resulting debris are in the approximate ratio 4:1:0.03 (Eisenbud, 1963). Beryllium-7 is of cosmogenic origin and potassium-40 is a naturally-occurring isotope. They were chosen as calibration monitors and should not be considered as radiological impact indicators. The other group quantified consists of niobium-95, ruthenium-103 and -106, cesium-134, barium-lanthanum-140, and cerium-141. These isotopes are released in small quantities by nuclear power plants, but to date their major source of injection into the general environment has been atmospheric nuclear testing. Nuclides of the final group, manganese-54, iron-59, cobalt-58 and -60, and zinc-65, are activation products and arise from activation of corrosion products. They are typical components of a nuclear power plants effluents, but are not produced in significant quantities by nuclear detonations.

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

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

To monitor the air environment, airborne particulates are collected on membrane filters by continuous pumping at five locations. Also, airborne iodine is collected by continuous pumping through charcoal filters at all of these locations. Both types of filters are changed and counted weekly. Particulate filters are analyzed for gross beta activity and charcoal filters for iodine-131.

Quarterly composites of particulate filters from each location are determined by gamma spectroscopy. One of the five locations is a control (M-1), and four are indicators (M-2, M-3, M-4, M-5). One of the indicators is located in the geographical sector expected to be most susceptible to any atmospheric emissions from the Plant (highest D/Q sector).

Ambient gamma radiation is monitored at forty locations, using CaSO4:Dy dosimeters with four sensitive areas at each location: fourteen in an inner ring in the general area of the site boundary, sixteen in the outer ring within 4-5 mile radius, six at special interest locations and four control locations, outside a 10 mile radius from the plant. They are replaced and measured quarterly.

As substitute for dairy sampling, vegetation is collected from locations M-41, M-42, and M-43 (C).

The samples are analyzed for iodine-131 and other gamma emitting isotopes.

Corn and potatoes are collected annually if fields are irrigated by water in which liquid radioactive effluent has been discharged. Analysis is done for gamma-emitting isotopes.

Well water is monitored by quarterly collections from three off-site locations (one control and two indicators) and one on-site Plant well. To detect possible groundwater contamination due to plant operations, samples from nineteen on-site monitoring wells are collected and analyzed for tritium and gamma emitting isotopes. The Ground Water Monitoring Program is further described in the Annual Effluent Release Report..

Quarterly collections of storm water runoff were added to monitor another possible pathway to the groundwater aquifer. The samples are also analyzed for tritium and gamma emitting isotopes.

River water is collected weekly at two locations, one upstream of the plant and one downstream.

Monthly composites are analyzed for gamma-emitting isotopes. Quarterly composites are analyzed for tritium.

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

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

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

(1) TLDs TLDs were found to be missing in the field at location M-2C for the first quarter of 2017 and at location M-15B for the third quarter of 2017.

(2) Air Particulates / Air Iodine:

M-01, Air particulate / air iodine sample for the week ending 3/8/17 was only a partial sample due to a GFCI failure during a thunderstorm.

M-01, Air Particulate / air iodine sample for the week ending 3/15/17. Sample was not sent for analysis due pump found off with only 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> of run time. Pump was replaced.

M-03, Air particulate filter sample for the week ending 6/14/17 was only a partial sample due to the hour meter for the sampler at location M-03 reading less than 50% of the hour meters for the other samplers for the same period. The lower reading is suspected to be caused by a power loss during a thunderstorm.

(3) Surface Water:

M-008, River water was frozen for the months of January 2017 and December 2017 and the weeks of 2/1/17, 2/8/17, 2/15/17 and 3/15/17.

(4) Bottom Organisms:

M-8 upstream bottom organisms were not found during either the first or second half of 2017.

Deviations from the program are summarized in Table 5.3.

3.4 Program Modifications No significant modifications were made to the MNGP Radiological Environmental Monitoring Program in 2017.

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

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

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

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Tritium concentrations are determined by liquid scintillation.

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

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

Environmental, Inc., Midwest Laboratory has a comprehensive quality control/quality assurance program designed to assure the reliability of data obtained. Details of the QA Program are presented elsewhere (ATI Environmental, Inc., Midwest Laboratory, 2017). The QA Program includes participation in Interlaboratory Comparison (crosscheck) Programs. Results obtained in the crosscheck programs are presented in Appendix A.

3.6 Land Use Census The 2017 land use census was conducted between September 12 and September 22, 2017 by the REMP Coordinator in accordance with the MNGP Chemistry Manual, Procedure I.05.41, Annual Land Use Census and Critical Receptor Identification, The survey was performed in order to identify the nearest residence, milk animals, meat animals, and gardens of greater than 500 ft2 with leafy green vegetables, in each of the 16 meteorological sectors within a five mile radius. In addition all milk animals, meat animals and all gardens of 500 ft2 or greater with leafy green vegetables within a three mile radius of the plant were located. Distance, direction and dose pathway information is used to determine if any sampling locations need to be changed in the REMP sampling program and for determining Critical Receptor data.

The 2017 survey was performed using door-to-door surveys and visual observations while driving; additionally, inputs from the 2016 field data forms and Homeland Security Emergency Management Monticello Basemap were used in determining changes in land use. The GPS unit for performing the LUC was found to have degraded functionality at the start of the census; the first day of census was performed with Street Atlas using the GPS unit that intermittently worked.

Subsequent locations identified were mapped on the Commander Compass application for the iPhone. Data was imported into Google Earth Pro to be compiled, placed into sectors and measured.

There were three sectors in which the highest D/Q values for gardens increased by greater than 20%. These increases in D/Q were due to a closer garden being grown in 2017 that was not present in 2016. The highest D/Q garden for 2017 did not change from the 2016 highest D/Q garden.

There was one sector where the highest D/Q value for Meat increased by greater than 20%. The change was due to a closer residence raising animals for meat consumption in the Northwest sector. The highest D/Q meat animal changed in the 2016 census.

There was one sector in which the highest D/Q values for the nearest residence increased by more than 20%. The cause of the increase was a minor difference in determining the location using Google Earth; the housing unit is not new, but exists right on the line between the SE and SSE sectors and is very sensitive to angular measurements due to its close proximity to the plant.

There are no milking animals within a five mile radius of the plant. Vegetation sampling is being performed in lieu of milk sampling. There are no crops being irrigated from the Mississippi River within five miles downstream of the plant. The nearest downstream drinking water supplies drawn from the Mississippi River remain St. Paul and Minneapolis water supplies as currently documented in the ODCM and USAR.

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Doses due to ground plane, inhalation and ingestion of vegetables and meat were calculated for the highest DIQ Residence, Meat Animal, Vegetable Garden, and combined Vegetable/Meat locations identified in the 2017 Land Use Census. In accordance with the ODCM, the long- and short-duration gaseous releases from the Reactor Building Vent and the Off-gas Stack for the previous calendar year were used as the source terms.

Doses were calculated using the RADEAS computer program with the 2016 Annual Effluent Data report source term as input. This resulted in identifying the same location and the same pathway as compared to last year's Critical Receptor. The location is residence GH garden located 1.18 miles away in the SSE sector (designated GH) and the pathway identified is the combination of ground plane, inhalation and vegetable ingestion to the THYROID of the CHILD Age Group. The critical receptor for purposes of compliance with 10CFR50 Appendix I for this period is defined as follows:

Sector: SSE; Distance: 1.18 miles; Pathways: Ground Plane, Inhalation and Vegetable; mrem/year: 3.01E-1; Age Group: Child; Organ: Thyroid.

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

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

4.1 Atmospheric Nuclear Detonations and Nuclear Accidents There were no reported accidents involving significant release to the environment at nuclear reactor facilities in 2017. The Fukushima Daiichi nuclear accident occurred March 11, 2011.

There were no reported atmospheric nuclear tests in 2017. The last reported atmospheric test was conducted on October 16, 1980 by the Peoples Republic of China.

4.2 Summary of Preoperational Data The following constitutes a summary of preoperational studies conducted at the Monticello Nuclear Generating Plant during the years 1968 to 1970, to determine background levels expected in the environment, and provided, where applicable, as a means for comparison with present day levels.

Strict comparisons, however, are difficult to make, since background levels of radiation were much higher in these years due to radioactive fallout from the atmosphere. Gross beta measurements in 3 3 fallout averaged 20,600 pCi/m in 1969 and 12,000 pCi/m in 1970. These levels are reflected throughout the various media tested.

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

below detection levels of 0.03 pCi/m In the terrestrial environment of 1968 to 1970, milk, agricultural crops, and soil were monitored. In milk samples, low levels of Cs-137 and Sr-90 were detected. Cs-137 levels averaged 16.7 pCi/L.

Soybean crop measurements in 1969 averaged 35.5 pCi/g for gross beta and 0.3 pCi/g for Cs-137. Gross beta measured in soil averaged 51.7 pCi/g . Present day measurements for cesium-137 are below detection levels in milk and agricultural crops.

The aqueous environment was monitored by testing of river water, bottom sediments, fish, aquatic vegetation, and periphyton. Specific location comparison of drinking, river, and well water concentrations for tritium and gross beta are not possible. However, tritium background levels, measured at seven separate locations from 1968 to 1970, averaged 970 pCi/L. Present day environmental samples measure below detection levels. Values for gross beta, measured from 1968 to 1970, averaged 9.8 pCi/L in upstream and downstream Mississippi River water, 4.4 pCi/L for well waters, and 18.6 pCi/L for lake waters. Gamma emitters were below the lower limit of detection (LLD). In shoreline sediments, gross beta background levels in 1970 averaged 49.8 pCi/g for both upstream and downstream samples. Cs-137 activity averaged 0.10 pCi/g for both upstream and downstream samples. Low levels of Cs-137, occasionally observed today can still be attributed to residual activity from atmospheric fallout. Gross beta levels in fish flesh averaged 5.3 pCi/g in 1968 and 1969. Cs-137, measured in 1969 and 1970, averaged 0.044 pCi/g. Gross beta background levels, in 1970, for aquatic vegetation, algae, and periphyton samples measured 86.7 pCi/g, 76.5 pCi/g, and 28.1 pCi/g respectively.

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4.3 Program Findings Results obtained show background levels of radioactivity in environmental samples collected outside of the Owner Controlled Area in 2017.

Ambient Radiation (TLD's)

Ambient radiation was measured in the general area of the site boundary, inner ring, at an outer ring 4 - 5 mi. distant from the Plant, at special interest areas and at four control locations. The means were similar for both inner and outer rings (16.1 and 15.1 mRem/91 days, respectively).

The mean for special interest locations was 15.0 mRem/91 days and the mean for the control locations was 14.7 mRem/91 days. Dose rates measured at the inner and outer ring locations were similar to those observed from 1999 through 2016 and are tabulated below. No plant effect on ambient gamma radiation is indicated (Figure 5-1).

Year Inner Ring Outer Ring Dose rate (mRem/91 days) 1999 15.1 14.3 2000 15.1 14.5 2001 14.3 13.7 2002 15.9 14.8 2003 15.6 15.0 2004 16.0 15.4 2005 15.6 15.2 2006 16.5 15.6 2007 16.1 15.1 2008 15.2 14.6 2009 14.9 14.4 2010 14.7 14.3 2011 14.8 14.3 2012 16.2 15.5 2013 14.4 14.0 2014 13.5 12.9 2015 14.8 14.2 2016 15.1 14.3 2017 16.1 15.1 Ambient gamma radiation as measured by thermoluminescent dosimetry.

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

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Airborne Particulates The average annual gross beta concentrations in airborne particulates were identical at the 3

indicator and control locations (0.028 pCi/m for both), similar to levels observed from 1999 through 2016. The results are tabulated below.

Year Indicators Control 3

Concentration (pCi/m )

1999 0.023 0.025 2000 0.027 0.026 2001 0.027 0.026 2002 0.028 0.028 2003 0.027 0.027 2004 0.024 0.024 2005 0.025 0.025 2006 0.024 0.025 2007 0.027 0.028 2008 0.028 0.029 2009 0.029 0.030 2010 0.026 0.026 2011 0.029 0.027 2012 0.032 0.031 2013 0.029 0.032 2014 0.027 0.028 2015 0.030 0.028 2016 0.026 0.024 2017 0.028 0.028 Average annual gross beta concentrations in airborne particulates.

Typically, the highest average readings occur during the months of January and December, and the first and fourth quarters, as observed in 1999 through 2016.

Gamma spectroscopic analysis of quarterly composites of air particulate filters yielded similar results for indicator and control locations. Beryllium-7, which is produced continuously in the upper atmosphere by cosmic radiation (Arnold and Al-Salih, 1955) was detected in all samples, 3 3 with an average activity of 0.077 pCi/m for the indicator locations and 0.080 pCi/m for the control location. All other gamma-emitting isotopes were below their respective LLD limits.

Airborne Iodine Weekly levels of airborne iodine-131 were below the lower limit of detection (LLD) of 0.03 pCi/m3 in all samples.

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River W ater and Drinking Water Tritium activity measured below 500 pCi/L in all samples. Gamma isotopic results were all below detection limits. Gross beta was detected in 10 out of 12 samples tested at an average of 2.0 pCi/L and was similar to average levels observed from 2000 through 2016. Gross beta averages are tabulated below. There was no indication of a plant effect.

Year Gross Beta (pCi/L) Year Gross Beta (pCi/L) 2000 2.5 2009 2.3 2001 2.5 2010 2.9 2002 2.9 2011 2.2 2003 3.0 2012 2.4 2004 2.7 2013 2.6 2005 2.8 2014 2.8 2006 2.1 2015 2.3 2007 2.8 2016 2.6 2008 2.1 2017 2.0 Average annual concentrations; Gross beta in drinking water.

Well Water At the four indicator and control locations, tritium was below the detection limit for all samples.

Gamma isotopic results were also below detection limits.

The data for 2017 were consistent with previous years results and no plant operational effects were indicated.

Vegetation in lieu of Milk Sampling Vegetation samples were collected in July, August and September, 2017. Iodine-131 concentrations measured below 0.028 pCi/g wet weight in all samples. These samples are required when milk samples are not available.

Crops A corn and potatoes collection was not required for 2017. No crops within five miles of the plant were found using irrigation water from the Mississippi River, and the plant did not discharge radioactive liquid effluents during the growing season.

Fish Eight fish were analyzed in 2017 consisting of two fish collected from upstream locations and two collected from downstream locations in June and then again in September. Flesh was separated from the bones and analyzed by gamma spectroscopy. Only naturally-occurring potassium-40 was found with an average of 2.85 pCi/g wet weight for four upstream samples and 2.83 pCi/g wet weight for the four downstream samples. These results agree with 2016 results. Other gamma-emitting isotopes remained below detection limits. There was no indication of a plant effect.

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Aquatic Invertebrates Downstream invertebrate sample collections were made in June and September 2017. No gamma-emitting isotopes were detected in either sample. There was no indication of a plant effect.

Shoreline Sediments Upstream, downstream and downstream recreational area shoreline sediment collections were made in June and September 2017, and analyzed for gamma-emitting isotopes. A level of cesium-137 was detected in both downstream samples (M-9) and (M-15), at an average concentration of 0.042 pCi/g dry weight at location M-9 and an average concentration of 0.032 pCi/g dry weight at location M-15. Similar levels of activity have been observed since 1978, and are indicative of the influence of fallout deposition. Naturally-occurring potassium-40 was also detected. There was no indication of a plant effect.

ISFSI TLD Monitoring Gamma and Neutron TLDs are located around the Independent Spent Fuel Storage Installation (ISFSI) to monitor direct radiation from stored fuel. Results for gamma monitoring are included in the Complete Data Analysis Tables. In the 2015 AREOR it was stated that MNGP intended to begin reporting results for neutron TLDs. Benchmarking of other nuclear plant annual reports indicates that neutron dose is not reported. MNGP is awaiting industry guidance on how neutron TLD dose should be treated in an environmental monitoring context before reporting neutron monitoring results. Neutron TLD results are used internally for trending of neutron dose rates around the ISFSI.

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5.0 FIGURES AND TABLES 13

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

Collection Analysis Location Type and Type and a

Medium No. Codes (and Type) Frequency b Frequency c REMP Ambient radiation(TLDs) 40 M-01A - M-14A, M-01B - M-16B C/Q Ambient gamma M-01S - M-06S, M-01C - M-04C ISFSI Ambient radiation (TLDs) 13 I-01 to I-13 C/Q Ambient Gamma Airborne Particulates 5 M-1(C), M-2, M-3, M-4, M-5 C/W GB, GS (QC of each location)

Airborne Iodine 5 M-1(C), M-2, M-3, M-4, M-5 C/W I-131 d

Pasture grass, Vegetation 3 M-41, M-42, M-43(C) 3x/year GS Surface water 2 M-8(C), M-9 G/W GS(MC), H-3(QC)

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

GS (MC), H-3 (QC)

Well water 4 M-11, M-12, M-55, M-43(C) G/Q H-3, GS Fish 2 M-8(C), M-9 G/SA GS (two species, edible portion)

Invertebrates 2 M-8(C), M-9 G/SA GS Shoreline sediment 3 M-8(C), M-9, M-15 G/SA GS a

Location codes are defined in Table 5.2. Control stations are indicated by (C). All other stations are indicators.

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

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

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

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

d Pasture grass and vegetation collections added to supplement dairy sampling.

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Table 5.2. Sampling locations, Monticello Nuclear Generating Plant.

Distance and Direction Code Type a Collection Site Sample Type b from Reactor M-1 C Air Station M-1 AP, AI 11.0 mi @ 307°/NW M-2 Air Station M-2 AP, AI 0.8 mi @ 140°/SE M-3 Air Station M-3 AP, AI 0.6 mi @ 104°/ESE M-4 Air Station M-4 AP, AI 0.8 mi @ 147°/SSE M-5 Air Station M-5 AP, AI 2.6 mi @ 134°/SE M-8 C Upstream of Plant Intake SW, SS, BO, F < 1000' upstream M-9 Downstream of Plant Discharge SW, SS, BO, F < 1000' downstream M-11 City of Monticello WW 3.3 mi @ 127°/SE M-12 Plant Well #11 WW 0.26 mi @ 252°/WSW M-14 City of Minneapolis DW 37.0 mi @ 132°/SE M-15 Montissippi Park SS 1.27 mi @ 114°/ESE M-27 Highest D/Q garden 1.15 mi @ 148°/SSE M-41 Training Center VE 0.8 mi @ 151°/SSE M-42 Biology Station Road VE 0.6 mi @ 134°/SE M-43 C Imholte Farm VE, WW 12.3 mi @ 313°/NW M-55 Hasbrouck Residence WW 1.60 mi @ 255°/WSW 15

Table 5.2. Sampling locations, Monticello Nuclear Generating Plant.

Distance and Code Typea Collection Site Sample Typeb Direction from Reactor General Area of the Site Boundary M-01A Sherburne Ave. So. TLD 0.75 mi @ 353°/N M-02A Sherburne Ave. So. TLD 0.79 mi @ 23°/NNE M-03A Sherburne Ave. So. TLD 1.29 mi @ 56°/NE M-04A Biology Station Road TLD 0.5 mi @ 92°/E M-05A Biology Station Road TLD 0.48 mi @ 122°/ESE M-06A Biology Station Road TLD 0.54 mi @ 138°/SE M-07A Parking Lot H TLD 0.47 mi @ 158°/SSE M-08A Parking Lot F TLD 0.45 mi @ 175°/S M-09A County Road 75 TLD 0.38 mi @ 206°/SSW M-10A County Road 75 TLD 0.38 mi @ 224°/SW M-11A County Road 75 TLD 0.4 mi @ 237°/WSW M-12A County Road 75 TLD 0.5 mi @ 262°/W M-13A North Boundary Road TLD 0.89 mi @ 322°/NW M-14A North Boundary Road TLD 0.78 mi @ 335°/NNW Approximately 4 to 5 miles Distant from the Plant M-01B 117th Street TLD 4.65 mi @ 01°/N M-02B County Road 11 TLD 4.4 mi @ 18°/NNE M-03B County Road 73 & 81 TLD 4.3 mi @ 51°/NE M-04B County Road 73 (196th St.) TLD 4.2 mi @ 67°/ENE M-05B City of Big Lake TLD 4.3 mi @ 89°/E M-06B County Road 14 and 196th St. TLD 4.3 mi @ 117°/ESE M-07B Monticello Industrial Drive TLD 4.3 mi @ 136°/SE M-08B Residence, Hwy 25 & Davidson Ave. TLD 4.6 mi @ 162°/SSE M-09B Weinand Farm TLD 4.7 mi @ 178°/S M-10B Reisewitz Farm, Acacia Ave. TLD 4.2 mi @ 204°/SSW M-11B Vanlith Farm, 97th Ave. TLD 4.0 mi @ 228°/SW M-12B Lake Maria State Park TLD 4.2 mi @ 254°/WSW M-13B Bridgewater Station TLD 4.1 mi @ 270°/W M-14B Anderson Residence, Cty Rd. 111 TLD 4.3 mi @ 289°/WNW M-15B Red Oak Wild Bird Farm TLD 4.3 mi @ 309°/NW M-16B Sand Plain Research Farm TLD 4.4 mi @ 341°/NNW 16

Table 5.2. Sampling locations, Monticello Nuclear Generating Plant.

Distance and Code Typea Collection Site Sample Typeb Direction from Reactor Special Interest Locations M-01S Telephone pole on 127th St. NE TLD 0.66 mi @ 241°/WSW M-02S Krone Residence TLD 0.5 mi @ 220°/SW M-03S Big Oaks Park TLD 1.53 mi @ 103°/ESE M-04S Pinewood School TLD 2.3 mi @ 131°/SE M-05S Rivercrest Christian Academy TLD 3.0 mi @ 118°/ESE M-06S Monticello Public Works TLD 2.6 mi @ 134°/SE ISFSI-11 I-11 (gamma) TLD OCA fence south, on exit road ISFSI 12 I-12 (gamma) TLD OCA fence middle, on exit road IFSFI 13 I-13 (gamma TLD OCA fence north, on exit road Control Locations M-01C C Kirchenbauer Farm TLD 11.5 mi @ 323°/NW M-02C C County Roads 4 and 15 TLD 11.2 mi @ 47°/NE M-03C C County Rd 19 and Jason Ave. TLD 11.6 mi @ 130°/SE M-04C C Maple Lake Water Tower TLD 10.3 mi @ 226°/ SW ISFSI TLD Locations (Non-REMP TLDs)

ISFSI-1 I-01 (gamma) TLD NE corner of ISFSI ISFSI-2 I-02 (gamma) TLD North side of ISFSI, center ISFSI-3 I-03 (gamma) TLD NW corner of ISFSI ISFSI-4 I-04 (gamma) TLD West side of ISFSI, middle ISFSI-5 I-05 (gamma) TLD West side of ISFSI, at center of array ISFSI-6 I-06 (gamma) TLD SW corner of ISFSI ISFSI-7 I-07 (gamma) TLD South side of ISFSI, center ISFSI-8 I-08 (gamma) TLD SE corner of ISFSI ISFSI-9 I-09 (gamma) TLD East side of ISFSI, at center of array ISFSI-10 I-10 (gamma) TLD East side of ISFSI, middle a

C denotes control location. All other locations are indicators.

b Sample Codes: AP Airborne particulates F Fish AI Airborne Iodine SW River Water BS Bottom (river) sediments SS Shoreline Sediments BO Bottom organisms TLD Thermoluminescent Dosimeter DW Drinking Water VE Vegetation / vegetables WW Well Water c

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

17

Table 5.3 Missed Collections and Analyses.

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

Collection Reason for not Sample Analysis Location Date or Plans for Preventing conducting REMP Type Period Recurrence as required Water frozen entire month; SW Gamma M-8c January 17 None No composite.

2/1/17, Water frozen. Only one sample in SW Gamma M-8c 2/8/17, None 2/15/17 composite.

Partial sample due to GFCI failure AP/AI Beta, I-131 M-1 3/8/17 Replaced GFCI.

during thunderstorm.

AP/AI Beta, I-131 M-1 3/15/17 Sample not sent; pump found Replaced pump.

off; only 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> of run time.

Water frozen. Not included in SW Gamma M-8c 3/15/17 None composite.

TLD Gamma M-2C 1st Qtr 2017 TLD missing in field. None Partial sample due to an apparent loss AP/AI Beta, I-131 M-3 6/14/17 None of power during a thunderstorm.

BO Gamma M-8c 1st half 2017 No upstream bottom organisms found. None TLD Gamma M-15B 3rd Qtr 2017 TLD missing in field. None BO Gamma M-8c 2nd half 2017 No upstream bottom organisms found. None Water Frozen entire month, SW Gamma M-8c December 17 None No Composite.

18

Figure 5-1. Offsite Ambient Radiation (TLDs); Inner Ring versus Outer Ring locations.

N 20 1-- - Inner Ring Outer Ring I

19 18 17 J l"i.

/2 ~

I i\ ~/JJ 16 I......__,V "-,

I / r--i ~ ~

1\)IJ "'

~

I V 15 II

i------

1/ ~ ~

~~

~

r--.

r1/

'L.

~

mR/91 days 14

')I 13 12 11 10 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 19

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

-*- Indicators (M-2, 3, 4, 5) NOT

---0-- Control (M-1) 0.035 0.033

'1v \

I\

// \

0.031 ---,

\

/

\

\ \ I

'\., /

0.029 ' I \

\ I \

~

/ \

I

,,,1~ ,f

/

I \ ~ \

\ I

\

\'1 //

J /" I I

\

V

\\ V 0.027 I

IJ----1 I I

0.025 V '

1*I I \I 0.023 pCi/m3 0.021 0.019 0.017 0.015 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 15 20

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2017

( County, State )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDb Mean (F)c Mean (F)c Mean (F)c Routine (Units) Analysesa Rangec Location d Rangec Rangec Resultse Direct Radiation TLD (Inner Ring, Gamma 56 3.0 16.1 (56/56) M-11A, 17.3 (4/4) (See Control 0 General Area at (14.0-17.6) 0.4 mi @ 250°/WSW (17.1-17.6) below.)

Site Boundary) mRem/91 days)

TLD (Outer Ring, Gamma 63 3.0 15.1 (63/63) M-14B 17.0 (4/4) (See Control 0 4-5 mi. distant) (11.7-17.6) 4.5 mi @ 228°/NW (15.8-17.6) below.)

mRem/91 days)

TLD (Special Gamma 36 3.0 15.0 (36/36) M-I-11 16.5 (4/4) (See Control 0 Interest Areas) (12.0-17.8) OCA fence South (15.3-17.8) below.)

mRem/91 days)

TLD (Control) Gamma 15 3.0 None M-03C 15.4 (4/4) 14.7 (15/15) 0 mRem/91 days) 11.6 mi @ 130°/SE (14.8-15.9) (13.0-16.7)

Airborne Pathway Airborne GB 263 0.002 0.028 (211/211 M-3, Air Station 0.028 (52/52) 0.028 (52/52) 0 Particulates ) (0.010-0.062) 0.6 mi @ 104°/ESE (0.011-0.059) (0.011-0.073)

(pCi/m3)

GS 20 Be-7 0.015 0.077 (16/16) M-5, Air Station 0.081 (4/4) 0.080 (4/4) 0 (0.052-0.103) 2.6 mi @ 134°/SE (0.062-0.103) (0.058-0.107)

Mn-54 0.0009 < LLD - - < LLD 0 Co-58 0.0010 < LLD - - < LLD 0 Co-60 0.0009 < LLD - - < LLD 0 Zn-65 0.0025 < LLD - - < LLD 0 Zr-Nb-95 0.0015 < LLD - - < LLD 0 Ru-103 0.0014 < LLD - - < LLD 0 Ru-106 0.0082 < LLD - - < LLD 0 Cs-134 0.0010 < LLD - - < LLD 0 Cs-137 0.0010 < LLD - - < LLD 0 Ba-La-140 0.0036 < LLD - - < LLD 0 Ce-141 0.0023 < LLD - - < LLD 0 Ce-144 0.0063 < LLD - - < LLD 0 Airborne Iodine I-131 263 0.03 < LLD - - < LLD 0 (pCi/m3) 21

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December,2017

( County, State )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDb Mean (F)c Mean (F)c Mean (F)c Routine (Units) Analysesa Rangec Locationd Rangec Rangec Resultse Waterborne Pathway H-3 12 500 < LLD - - < LLD 0 River Water (pCi/L)

GS 12 Mn-54 10 < LLD - - < LLD 0 Fe-59 30 < LLD - - < LLD 0 Co-58 10 < LLD - - < LLD 0 Co-60 10 < LLD - - < LLD 0 Zn-65 30 < LLD - - < LLD 0 Zr-Nb-95 15 < LLD - - < LLD 0 Cs-134 10 < LLD - - < LLD 0 Cs-137 10 < LLD - - < LLD 0 Ba-La-140 15 < LLD - - < LLD 0 Ce-144 42 < LLD - - < LLD 0 12 GB 12 2.5 2.0 (10/12) M-14 City of Minneapolis 2.0 (10/12) None 0 Drinking Water (pCi/L) (1.3-4.4) 37.0 mi @ 132°/SE (1.3-4.4)

I-131 12 1.0 < LLD - - None 0 H-3 4 500 < LLD - - None 0 GS 12 Mn-54 10 < LLD - - None 0 Fe-59 30 < LLD - - None 0 Co-58 10 < LLD - - None 0 Co-60 10 < LLD - - None 0 Zn-65 30 < LLD - - None 0 Zr-Nb-95 15 < LLD - - None 0 Cs-134 10 < LLD - - None 0 Cs-137 10 < LLD - - None 0 Ba-La-140 15 < LLD - - None 0 Ce-144 42 < LLD - - None 0 H-3 16 500 < LLD - - < LLD 0 Well Water (pCi/L) GS 16 Mn-54 10 < LLD - - < LLD 0 Fe-59 30 < LLD - - < LLD 0 Co-58 10 < LLD - - < LLD 0 Co-60 10 < LLD - - < LLD 0 Zn-65 30 < LLD - - < LLD 0 Zr-Nb-95 15 < LLD - - < LLD 0 Cs-134 10 < LLD - - < LLD 0 Cs-137 10 < LLD - - < LLD 0 Ba-La-140 B 15 < LLD - - < LLD 0 a

Ce-144 39 < LLD - - < LLD 0 L

a 1

4 22 0

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2017

( County, State )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-I Type Number of LLD b Mean (F)c Mean (F)c Mean (F)c Routine (Units) Analysesa Rangec Location d Rangec Rangec Resultse Waterborne Pathway GS 2 Aquatic Invertebrates Be-7 1.27 < LLD - - None 0 (pCi/g wet) K-40 2.23 < LLD - - None 0 Mn-54 0.097 < LLD - - None 0 Fe-59 0.30 < LLD - - None 0 Co-58 0.076 < LLD - - None 0 Co-60 0.096 < LLD - - None 0 Zn-65 0.22 < LLD - - None 0 Zr-Nb-95 0.22 < LLD - - None 0 Ru103 0.18 < LLD - - None 0 Ru-106 0.76 < LLD - - None 0 Cs-134 0.11 < LLD - - None 0 Cs-137 0.13 < LLD - - None 0 Ba-La-140 0.54 < LLD - - None 0 Ce-144 0.45 < LLD - - None 0 GS 6 Shoreline Sediments Be-7 0.12 < LLD - - < LLD 0 (pCi/g dry)

K-40 0.10 9.97 (4/4) M-8, Upstream 10.82 (2/2) 10.82 (2/2) 0 (9.49-10.58) < 1000 ft upstream (10.41-11.24) (10.41-11.24) 9.97 Mn-54 0.018 < LLD - - < LLD 0 Fe-59 0.042 < LLD - - < LLD 0 Co-58 0.015 < LLD - - < LLD 0 Co-60 0.041 < LLD - - < LLD 0 Zn-65 0.027 < LLD - - < LLD 0 Zr-Nb-95 0.034 < LLD - - < LLD 0 Ru103 0.019 < LLD - - < LLD 0 Ru-106 0.12 < LLD - - < LLD 0 Cs-134 0.016 < LLD - - < LLD 0 Cs-137 0.037 (4/4) M-9, Downstream 0.042 (2/2) < LLD 0 (0.030-0.045) < 1000 ft downstream (0.038-0.045)

Ba-La-140 0.16 < LLD - - < LLD 0 Ce-144 0.082 < LLD - - < LLD 0 23

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. 50-263 Location of Facility Wright, Minnesota Reporting Period January-December, 2017

( County, State )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDb Mean (F)c Mean (F)c Mean (F)c Routine (Units) Analysesa Rangec Location d Rangec Rangec Resultse Ingestion Pathway Vegetation GS 9 (Pasture Grass, Mn-54 0.014 < LLD - - < LLD 0 Weeds, Leaves) < LLD - - < LLD Fe-59 0.035 0 (pCi/gwet Co-58 0.016 < LLD - - < LLD 0 Co-60 0.016 < LLD - - < LLD 0 Zn-65 0.026 < LLD - - < LLD 0 Nb-95 0.019 < LLD - - < LLD 0 I-131 0.028 < LLD - - < LLD 0 Cs-134 0.017 < LLD - - < LLD 0 Cs-137 0.017 < LLD - - < LLD 0 GS 8 Fish (pCi/g wet) K-40 0.10 2.83 (4/4) M-8, Upstream 2.85 (4/4) 2.85 (4/4) 0 (2.34-3.26) < 1000 ft upstream (2.74-3.08) (2.74-3.08)

Mn-54 0.017 < LLD - - < LLD 0 Fe-59 0.065 < LLD - - < LLD 0 Co-58 0.023 < LLD - - < LLD 0 Co-60 0.020 < LLD - - < LLD 0 Zn-65 0.038 < LLD - - < LLD 0 Zr-Nb-95 0.037 < LLD - - < LLD 0 Cs-134 0.020 < LLD - - < LLD 0 Cs-137 0.018 < LLD - - < LLD 0 Ba-La-140 0.161 < LLD - - < LLD 0 Ce144 0.110 < LLD - - < LLD 0 a

GB = gross beta, GS = gamma scan.

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

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

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

e Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten time the typical preoperational value for the medium or location.

24

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.

ATI Environmental, Inc., Midwest Laboratory.

2001a through 2016a. Radiation Environmental Monitoring for Monticello Nuclear Generating Plant, Complete Analysis Data Tables, January-December, 2000 through 2016.

2001b through 2016b. Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January - December, 2000 through 2016.

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

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

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

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

1979a to 1983a. (formerly Hazleton Environmental Sciences Corporation) Radiation Environmental Monitoring for Monticello Nuclear Generating Plant, Complete Analysis Data Tables, January - December, 1978 through 1982.

1979b to 1983b. (formerly Hazleton Environmental Sciences Corporation) Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January -

December, 1978 through 1982.

2016 .Quality Control Procedures Manual, Rev. 3, 03 March 2016.

2017. Quality Manual, Rev.4, 19 June 2017.

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

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

Northern States Power Company.

1969 through 1971. Monticello Nuclear Generating Plant, Environmental Radiation Monitoring Program, Annual Report, June 18, 1968 to December 31, 1968, 1969, 1970. Minneapolis, Minnesota.

1978 through 2008. Monticello Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1, to December 31, 1977 through 2007.

25

6.0 REFERENCES

CITED (continued)

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

U.S. Environmental Protection Agency .

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

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

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

Xcel Energy Corporation.

2009 to 2016. Monticello Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1 to December 31, 2008 through 2016. Minneapolis, Minnesota.

2009 to 2016. Prairie Island Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1 to December 31, 2008 through 2016.

Minneapolis, Minnesota.

26

~~(. ATI Environmental, Inc.

'+' J-\1 Midwest Laboratory 700 Landwehr Road* Northbrook, IL 60062-2310 phone (847) 564-0700

• fax (847) 564-4517 APPENDIX A INTERLABORATORY COMPARISON PROGRAM RESULTS AND INTRALABORATORY COMPARISON PROGRAM RESULTS NOTE: Appendix A is updated four times a year. The complete appendix is included in March, June, September and December monthly progress reports only.

January, 2017 through December, 2017

Appendix A Interlaboratory/ Intralaboratory 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 laboratorys 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 Resources Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

Table A-2 lists results for thermoluminescent dosimeters (TLDs), via irradiation and evaluation by the University of Wisconsin-Madison Radiation Calibration Laboratory at the University of Wisconsin Medical Radiation Research Center.

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

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

Table A-5 lists analytical results from the in-house duplicate program for the past twelve months. Acceptance is based on the difference of the results being less than the sum of the errors.

Complete analytical data for duplicate analyses is available upon request.

The results in Table A-6 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

Results in Table A-7 were obtained through participation in the MRAD PT Study Proficiency Testing Program administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurement Laboratory Quality Assessment Program (EML).

Attachment A lists the acceptance criteria for spiked sample results presented in Table A-3.

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

A1

Attachment A ACCEPTANCE CRITERIA FOR SPIKED SAMPLES Analysis Ratio of lab result to known value.

Gamma Emitters 0.8 to 1.2 Strontium-89 0.8 to 1.2 Strontium-90 0.8 to 1.2 Potassium-40 0.8 to 1.2 Gross alpha 0.5 to 1.5 Gross beta 0.8 to 1.2 Tritium 0.8 to 1.2 Radium-226,-228 0.7 to 1.3 Plutonium 0.8 to 1.2 Iodine-131, 0.8 to 1.2 Iodine-129 Uranium-238, 0.7 to 1.3 Nickel-63 Technetium-99 Iron-55 0.8 to 1.2 Other Analyses 0.8 to 1.2 A2

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

RAD study Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result Result Limits Acceptance ERW-95 1/9/2017 Sr-89 51.9 +/- 4.6 55.5 44.3 - 63.2 Pass ERW-95 1/9/2017 Sr-90 43.6 +/- 2.4 43.1 31.8 - 49.5 Pass ERW-97 1/9/2017 Ba-133 78.2 +/- 4.1 85.6 72.0 - 94.2 Pass ERW-97 1/9/2017 Cs-134 53.9 +/- 3.8 52.6 42.4 - 57.9 Pass ERW-97 1/9/2017 Cs-137 122 +/-6 112 101 - 126 Pass ERW-97 1/9/2017 Co-60 117 +/-4 113 102 - 126 Pass ERW-97 1/9/2017 Zn-65 208 +/- 13 189 170 - 222 Pass ERW-99 1/9/2017 Gr. Alpha 48.9 +/- 2.4 52.3 27.3 - 65.5 Pass ERW-99 1/9/2017 Gr. Beta 37.1 +/- 1.3 41.6 27.7 - 49.0 Pass ERW-101 1/9/2017 I-131 22.3 +/- 0.6 24.3 20.2 - 28.8 Pass ERW-103 1/9/2017 Ra-226 11.3 +/- 0.4 12.7 9.5 - 14.7 Pass ERW-103 1/9/2017 Ra-228 6.10 +/- 0.90 6.20 3.8 - 8.1 Pass ERW-103 1/9/2017 Uranium 11.8 +/- 0.8 12.6 9.9 - 14.4 Pass ERW-106 1/9/2017 H-3 12,600 +/- 300 12,500 10,900 - 13,800 Pass ERW-3344 7/10/2017 Sr-89 29.0 +/- 10.0 26.4 18.4 - 32.9 Pass ERW-3344 7/10/2017 Sr-90 33.8 +/- 3.3 36.0 26.4 - 41.5 Pass ERW-3346 7/10/2017 Ba-133 66.4 +/- 4.1 66.3 55.2 - 72.9 Pass ERW-3346 7/10/2017 Cs-134 27.0 +/- 4.3 24.4 18.7 - 27.2 Pass ERW-3346 7/10/2017 Cs-137 57.4 +/- 4.5 51.6 46.4 - 59.6 Pass ERW-3346 7/10/2017 Co-60 92.6 +/- 4.4 88.6 79.7 - 99.8 Pass ERW-3346 7/10/2017 Zn-65 32.4 +/- 6.0 32.7 27.3 - 41.6 Pass ERW-3348 7/10/2017 Gr. Alpha 23.7 +/- 1.9 25.7 13.0 - 34.1 Pass ERW-3348 7/10/2017 Gr. Beta 54.6 +/- 1.6 63.0 43.5 - 69.6 Pass ERW-3350 7/10/2017 I-131 25.4 +/- 1.3 25.5 21.2 - 30.1 Pass ERW-3352 7/10/2017 Ra-226 1.38 +/- 0.15 1.29 1.07 - 1.95 Pass ERW-3352 7/10/2017 Ra-228 6.70 +/- 0.93 5.66 3.45 - 7.47 Pass ERW-3352 7/10/2017 Uranium 58.4 +/- 0.9 66.7 54.3 - 73.9 Pass ERW-3354 7/10/2017 H-3 5,254 +/- 224 5,060 4,340 - 5,570 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 Resources Associates (ERA).

A1-1

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

mrem b c Lab Code Irradiation Delivered Reported Performance Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 1 2017-1 10/16/2017 Spike 1 59.0 49.3 -0.16 2017-1 10/16/2017 Spike 2 59.0 53.2 -0.10 2017-1 10/16/2017 Spike 3 59.0 52.7 -0.11 2017-1 10/16/2017 Spike 4 59.0 53.4 -0.09 2017-1 10/16/2017 Spike 5 59.0 51.8 -0.12 2017-1 10/16/2017 Spike 6 59.0 54.0 -0.08 2017-1 10/16/2017 Spike 7 59.0 52.0 -0.12 2017-1 10/16/2017 Spike 8 59.0 52.6 -0.11 2017-1 10/16/2017 Spike 9 59.0 54.6 -0.07 2017-1 10/16/2017 Spike 10 59.0 50.4 -0.15 2017-1 10/16/2017 Spike 11 59.0 53.9 -0.09 2017-1 10/16/2017 Spike 12 59.0 55.7 -0.06 2017-1 10/16/2017 Spike 13 59.0 50.2 -0.15 2017-1 10/16/2017 Spike 14 59.0 52.4 -0.11 2017-1 10/16/2017 Spike 15 59.0 54.3 -0.08 2017-1 10/16/2017 Spike 16 59.0 53.2 -0.10 2017-1 10/16/2017 Spike 17 59.0 50.1 -0.15 2017-1 10/16/2017 Spike 18 59.0 52.3 -0.11 2017-1 10/16/2017 Spike 19 59.0 50.3 -0.15 2017-1 10/16/2017 Spike 20 59.0 50.7 -0.14 2017-1 10/16/2017 Spike 21 59.0 53.1 -0.10 2017-1 10/16/2017 Spike 22 59.0 51.5 -0.13 2017-1 10/16/2017 Spike 23 59.0 54.4 -0.08 2017-1 10/16/2017 Spike 24 59.0 53.3 -0.10 2017-1 10/16/2017 Spike 25 59.0 53.7 -0.09 2017-1 10/16/2017 Spike 26 59.0 51.6 -0.13 2017-1 10/16/2017 Spike 27 59.0 51.5 -0.13 2017-1 10/16/2017 Spike 28 59.0 51.6 -0.13 2017-1 10/16/2017 Spike 29 59.0 49.9 -0.15 2017-1 10/16/2017 Spike 30 59.0 55.3 -0.06 Mean (Spike 1-30) 52.4 -0.11 Passd Standard Deviation (Spike 1-30) 1.7 0.03 Passd 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)K a = 1.20 . mrem/cGy = 1000.

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

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

A2-1

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

mrem b c Lab Code Irradiation Delivered Reported Performance Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 2 2017-2 10/16/2017 Spike 31 186.0 164.7 -0.11 2017-2 10/16/2017 Spike 32 186.0 172.0 -0.08 2017-2 10/16/2017 Spike 33 186.0 167.3 -0.10 2017-2 10/16/2017 Spike 34 186.0 160.6 -0.14 2017-2 10/16/2017 Spike 35 186.0 171.7 -0.08 2017-2 10/16/2017 Spike 36 186.0 177.0 -0.05 2017-2 10/16/2017 Spike 37 186.0 176.7 -0.05 2017-2 10/16/2017 Spike 38 186.0 165.5 -0.11 2017-2 10/16/2017 Spike 39 186.0 174.6 -0.06 2017-2 10/16/2017 Spike 40 186.0 172.7 -0.07 2017-2 10/16/2017 Spike 41 186.0 167.8 -0.10 2017-2 10/16/2017 Spike 42 186.0 161.0 -0.13 2017-2 10/16/2017 Spike 43 186.0 166.3 -0.11 2017-2 10/16/2017 Spike 44 186.0 172.4 -0.07 2017-2 10/16/2017 Spike 45 186.0 173.0 -0.07 2017-2 10/16/2017 Spike 46 186.0 169.5 -0.09 2017-2 10/16/2017 Spike 47 186.0 169.0 -0.09 2017-2 10/16/2017 Spike 48 186.0 166.9 -0.10 2017-2 10/16/2017 Spike 49 186.0 165.9 -0.11 2017-2 10/16/2017 Spike 50 186.0 166.7 -0.10 2017-2 10/16/2017 Spike 51 186.0 161.1 -0.13 2017-2 10/16/2017 Spike 52 186.0 173.4 -0.07 2017-2 10/16/2017 Spike 53 186.0 173.1 -0.07 2017-2 10/16/2017 Spike 54 186.0 160.0 -0.14 2017-2 10/16/2017 Spike 55 186.0 166.1 -0.11 2017-2 10/16/2017 Spike 56 186.0 164.5 -0.12 2017-2 10/16/2017 Spike 57 186.0 163.8 -0.12 2017-2 10/16/2017 Spike 58 186.0 159.9 -0.14 2017-2 10/16/2017 Spike 59 186.0 165.6 -0.11 2017-2 10/16/2017 Spike 60 186.0 165.0 -0.11 Mean (Spike 31-60) 167.8 -0.10 Passd Standard Deviation (Spike 31-60) 5.0 0.03 Passd 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)K a = 1.20 . mrem/cGy = 1000.

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

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

A2-2

TABLE A-3. In-House "Spiked" Samples Concentration a Lab Code b Date Analysis Laboratory results Known Control Ratio 2s, n=1 c Activity Limits d Acceptance Lab/Known W-010417 4/29/2016 Cs-134 38.2 +/- 8.1 36.2 29.0 - 43.4 Pass 1.06 W-010417 4/29/2016 Cs-137 78.0 +/- 8.8 71.9 57.5 - 86.3 Pass 1.08 SPW-306 1/4/2017 Ra-226 18.1 +/- 0.4 16.7 11.7 - 21.7 Pass 1.08 SPW-32 1/6/2017 H-3 17,849 +/- 393 17,243 13,794 - 20,692 Pass 1.04 SPW-46 1/9/2017 Gr. Alpha 20.0 +/- 0.4 20.1 10.0 - 30.1 Pass 1.00 SPW-46 1/9/2017 Gr. Beta 29.0 +/- 0.3 28.9 23.1 - 34.6 Pass 1.00 SPW-92 1/11/2017 H-3 18,095 +/- 397 17,243 13,794 - 20,692 Pass 1.05 SPW-142 1/12/2017 Sr-90 39.4 +/- 2.3 36.6 29.2 - 43.9 Pass 1.08 SPW-155 1/19/2017 H-3 17,974 +/- 400 17,243 13,794 - 20,692 Pass 1.04 SPW-186 1/23/2017 H-3 17,383 +/- 366 17,243 13,794 - 20,692 Pass 1.01 SPW-232 1/19/2017 H-3 17,542 +/- 368 17,243 13,794 - 20,692 Pass 1.02 SPW-304 1/26/2017 H-3 17,782 +/- 400 17,243 13,794 - 20,692 Pass 1.03 SPW-333 1/30/2017 H-3 17,910 +/- 406 17,243 13,794 - 20,692 Pass 1.04 SPW-353 2/2/2017 U-234 47.8 +/- 2.3 41.7 29.2 - 54.2 Pass 1.15 SPW-353 2/2/2017 U-238 50.4 +/- 2.4 41.7 29.2 - 54.2 Pass 1.21 W-020217 4/29/2016 Cs-134 33.7 +/- 6.1 36.2 29.0 - 41.2 Pass 0.93 W-020217 4/29/2016 Cs-137 78.4 +/- 7.3 71.9 57.5 - 86.3 Pass 1.09 SPW-412 2/6/2017 Sr-90 36.2 +/- 2.4 36.6 29.2 - 43.9 Pass 0.99 SPW-465 2/8/2017 H-3 17,573 +/- 396 17,243 13,794 - 20,692 Pass 1.02 SPW-561 2/15/2017 H-3 17,358 +/- 395 17,243 13,794 - 20,692 Pass 1.01 SPW-605 2/16/2017 H-3 17,820 +/- 401 17,243 13,794 - 20,692 Pass 1.03 SPW-657 2/17/2017 H-3 17,614 +/- 376 17,243 13,794 - 20,692 Pass 1.02 SPW-714 2/23/2017 H-3 17,662 +/- 400 17,243 13,794 - 20,692 Pass 1.02 SPW-737 2/28/2017 H-3 17,196 +/- 395 17,243 13,794 - 20,692 Pass 1.00 SPAP-740 2/28/2017 Gr. Beta 38.9 +/- 0.1 41.5 33.2 - 49.8 Pass 0.94 SPAP-742 2/24/2017 Cs-134 1.05 +/- 0.60 0.98 0.8 - 6.0 Pass 1.07 SPAP-742 2/24/2017 Cs-137 90.4 +/- 2.5 92.9 74.3 - 111 Pass 0.97 SPW-746 2/28/2017 Sr-90 42.8 +/- 2.5 36.6 29.2 - 43.9 Pass 1.17 SPW-748 2/28/2017 C-14 4,270 +/- 17 4,735 3,788 - 5,682 Pass 0.90 SPW-750 2/28/2017 Ni-63 463 +/-4 400 280 - 520 Pass 1.16 SPF-752 2/28/2017 Cs-134 1033 +/- 38 1090 872 - 1308 Pass 0.95 SPF-752 2/28/2017 Cs-137 3071 +/- 61 2820 2,256 - 3,384 Pass 1.09 SPW-781 3/1/2017 Ra-226 18.1 +/- 0.4 16.7 11.7 - 21.7 Pass 1.08 SPW-783 3/1/2017 H-3 17,653 +/- 400 17,243 13,794 - 20,692 Pass 1.02 W-030517 4/29/2016 Cs-134 38.0 +/- 9.0 36.2 29.0 - 43.4 Pass 1.05 W-030517 4/29/2016 Cs-137 80.9 +/- 9.2 71.9 57.5 - 86.3 Pass 1.13 SPW-1010 3/14/2017 H-3 17,312 +/- 395 17,243 13,794 - 20,692 Pass 1.00 SPW-1026 3/16/2017 Gr. Alpha 22.4 +/- 0.5 20.1 10.0 - 30.1 Pass 1.11 SPW-1026 3/16/2017 Gr. Beta 29.2 +/- 0.3 28.9 23.1 - 34.6 Pass 1.01 SPW-1092 3/21/2017 H-3 17,252 +/- 390 17,243 13,794 - 20,692 Pass 1.00 SPW-1151 3/24/2017 H-3 17,009 +/- 388 17,243 13,794 - 20,692 Pass 0.99 SPW-1163 3/28/2017 Sr-90 39.0 +/- 2.3 36.3 29.0 - 43.5 Pass 1.08 SPW-1178 3/29/2017 Ra-228 15.1 +/- 1.9 16.0 11.2 - 20.8 Pass 0.94 A3-1

TABLE A-3. In-House "Spiked" Samples Concentration a Lab Code b Date Analysis Laboratory results Known Control Ratio 2s, n=1 c Activity Limits d Acceptance Lab/Known SPW-1232 3/30/2017 H-3 17,150 +/- 390 17,243 13,794 - 20,692 Pass 0.99 SPW-1246 3/31/2017 I-131(G) 33.0 +/- 7.3 36.6 29.3 - 43.9 Pass 0.90 SPW-1246 3/31/2017 Cs-134 28.9 +/- 4.6 26.6 21.3 - 31.9 Pass 1.09 SPW-1246 3/31/2017 Cs-137 80.6 +/- 8.2 70.4 56.3 - 84.5 Pass 1.15 SPMI-1248 3/31/2017 I-131(G) 39.8 +/- 7.0 36.6 29.3 - 43.9 Pass 1.09 SPMI-1248 3/31/2017 Cs-134 26.9 +/- 5.9 26.6 21.3 - 31.9 Pass 1.01 SPMI-1248 3/31/2017 Cs-137 70.4 +/- 6.9 70.4 56.3 - 84.5 Pass 1.00 SPMI-1248 3/31/2017 I-131 36.2 +/- 0.6 36.6 29.3 - 43.9 Pass 0.99 SPW-1295 3/31/2017 Ra-226 17.9 +/- 0.4 16.7 11.7 - 21.7 Pass 1.07 SPW-1304 4/4/2017 H-3 17,741 +/- 398 17,243 13,794 - 20,692 Pass 1.03 SPW-1359 4/5/2017 I-131 44.3 +/- 0.5 47.6 38.1 - 57.1 Pass 0.93 SPW-1378 4/7/2017 H-3 17,528 +/- 395 17,243 13,794 - 20,692 Pass 1.02 SPW-1391 4/7/2017 Gr. Alpha 21.1 +/- 0.4 20.1 10.0 - 30.1 Pass 1.05 SPW-1391 4/7/2017 Gr. Beta 27.8 +/- 0.3 28.2 22.6 - 33.8 Pass 0.99 SPW-1480 4/12/2017 H-3 17,399 +/- 392 17,243 13,794 - 20,692 Pass 1.01 W-041317 4/29/2016 Cs-134 34.6 +/- 5.6 36.2 29.0 - 43.4 Pass 0.96 W-041317 4/29/2016 Cs-137 81.9 +/- 8.0 71.9 57.5 - 86.3 Pass 1.14 SPW-1480 4/12/2017 H-3 17,399 +/- 392 17,243 13,794 - 20,692 Pass 1.01 SPW-1575 4/18/2017 H-3 17,419 +/- 393 17,243 13,794 - 20,692 Pass 1.01 SPW-1626 4/20/2017 Sr-90 37.2 +/- 2.4 36.3 29.0 - 43.5 Pass 1.02 SPW-1658 4/21/2017 H-3 17,194 +/- 391 17,243 13,794 - 20,692 Pass 1.00 SPW-1776 4/26/2017 H-3 16,609 +/- 386 17,243 13,794 - 20,692 Pass 0.96 SPW-1806 4/27/2017 H-3 17,203 +/- 390 17,243 13,794 - 20,692 Pass 1.00 SPW-1937 5/3/2017 H-3 16,690 +/- 385 17,243 13,794 20,692 Pass 0.97 SPW-1971 5/5/2017 Sr-90 41.5 +/- 2.2 36.3 29.0 - 43.5 Pass 1.14 SPW-2033 5/8/2017 H-3 16,780 +/- 386 17,243 13,794 20,692 Pass 0.97 SPW-2420 5/9/2017 Ra-226 16.3 +/- 0.5 16.7 11.7 - 21.7 Pass 0.98 W-051517 4/29/2016 Cs-134 36.3 +/- 5.0 36.2 29.0 - 43.4 Pass 1.00 W-051517 4/29/2016 Cs-137 68.9 +/- 6.6 71.9 57.5 - 86.3 Pass 0.96 SPW-2284 5/22/2017 H-3 16,935 +/- 389 16,703 13,362 - 20,044 Pass 1.01 SPW-2354 5/23/2017 H-3 17,006 +/- 390 16,700 13,360 - 20,040 Pass 1.02 SPW-2891 5/23/2017 Ra-226 17.5 +/- 0.4 16.7 13.4 - 20.1 Pass 1.05 SPW-2418 5/23/2017 Ra-228 14.0 +/- 1.8 16.0 11.2 - 20.8 Pass 0.87 SPW-2439 5/25/2017 Ra-228 13.0 +/- 1.8 16.0 11.2 - 20.8 Pass 0.81 SPMI-2378 5/24/2017 Sr-89 83.7 +/- 4.9 98.4 78.7 - 118.1 Pass 0.85 SPMI-2378 5/24/2017 Sr-90 39.5 +/- 1.5 36.1 28.9 - 43.4 Pass 1.09 SPW-2468 5/26/2017 H-3 17,065 +/- 391 16,692 13,354 - 20,030 Pass 1.02 SPW-2848 5/26/2017 I-131 56.4 +/- 0.6 58.3 46.6 - 69.9 Pass 0.97 SPW-2502 6/1/2017 H-3 17,596 +/- 396 16,677 13,342 - 20,012 Pass 1.06 SPW-2659 6/5/2017 H-3 17,027 +/- 390 16,677 13,342 - 20,012 Pass 1.02 SPW-2790 6/9/2017 H-3 17,101 +/- 392 17,101 13,681 - 20,521 Pass 1.00 A3-2

TABLE A-3. In-House "Spiked" Samples Concentration a b

Lab Code Date Analysis Laboratory results Known Control Ratio 2s, n=1 c Activity Limits d Acceptance Lab/Known SPW-2798 6/12/2017 H-3 16,683 +/- 364 16,649 13,319 - 19,979 Pass 1.00 SPW-2943 6/19/2017 Sr-90 39.2 +/- 2.3 36.1 28.9 - 43.3 Pass 1.09 SPW-3509 6/15/2017 Ra-226 17.6 +/- 0.5 16.7 11.7 - 21.7 Pass 1.05 W-061317 4/29/2016 Cs-134 35.0 +/- 6.2 36.2 29.0 - 43.4 Pass 0.97 W-061317 4/29/2016 Cs-137 77.4 +/- 7.8 71.9 57.5 - 86.3 Pass 1.08 SPW-3041 6/23/2017 H-3 16,419 +/- 378 16,620 13,296 - 19,944 Pass 0.99 SPW-3511 6/23/2017 Ra-226 15.5 +/- 0.6 16.7 11.7 - 21.7 Pass 0.93 SPW-3103 6/28/2017 H-3 16,507 +/- 380 16,507 13,206 - 19,808 Pass 1.00 SPW-3117 6/29/2017 Tc-99 112.7 +/- 1.9 107.8 75.5 - 140.1 Pass 1.05 SPW-3513 6/29/2017 Ra-226 17.8 +/- 0.5 16.7 11.7 - 21.7 Pass 1.06 SPW-3188 7/3/2017 Sr-90 38.1 +/- 2.2 36.1 28.9 - 43.3 Pass 1.06 SPW-3283 7/11/2017 H-3 16,057 +/- 347 16,649 13,319 - 19,979 Pass 0.96 SPW-4054 7/11/2017 Ra-226 17.7 +/- 0.4 16.0 11.2 - 20.8 Pass 1.11 SPW-3467 7/14/2017 Gr. Alpha 22.3 +/- 0.5 20.1 10.0 - 30.1 Pass 1.11 SPW-3467 7/14/2017 Gr. Beta 29.1 +/- 0.3 28.2 22.6 - 33.8 Pass 1.03 SPW-3449 7/15/2017 H-3 17,196 +/- 393 16,507 13,206 - 19,808 Pass 1.04 SPW-3548 7/19/2017 H-3 16,764 +/- 386 16,507 13,206 - 19,808 Pass 1.02 SPW-3728 7/24/2017 H-3 16,117 +/- 354 16,507 13,206 - 19,808 Pass 0.98 SPW-3794 7/28/2017 H-3 16,645 +/- 384 16,507 13,206 - 19,808 Pass 1.01 W-072817 4/29/2016 Cs-134 38.6 +/- 5.6 36.2 29.0 - 43.4 Pass 1.07 W-072817 4/29/2016 Cs-137 76.5 +/- 7.6 71.9 57.5 - 86.3 Pass 1.06 SPW-3905 8/3/2017 Gr. Alpha 22.3 +/- 0.5 20.1 10.0 - 30.1 Pass 1.11 SPW-3905 8/3/2017 Gr. Beta 27.6 +/- 0.3 28.2 22.6 - 33.8 Pass 0.98 SPW-4030 8/9/2017 H-3 17,636 +/- 403 16,507 13,206 - 19,808 Pass 1.07 SPW-4086 8/14/2017 H-3 17,472 +/- 401 16,507 13,206 - 19,808 Pass 1.06 SPW-4207 8/17/2017 H-3 17,013 +/- 393 16,507 13,206 - 19,808 Pass 1.03 W-083017 4/29/2016 Cs-134 34.7 +/- 6.4 36.2 29.0 - 43.4 Pass 0.96 W-083017 4/29/2016 Cs-137 78.2 +/- 6.7 71.9 57.5 - 86.3 Pass 1.09 SPW-4241 8/19/2017 H-3 17,222 +/- 371 16,507 13,206 - 19,808 Pass 1.04 SPW-4458 9/1/2017 Ra-226 14.1 +/- 1.8 16.7 11.7 - 21.7 Pass 0.84 SPW-4466 9/6/2017 Sr-89 22.8 +/- 8.5 26.4 21.1 - 31.7 Pass 0.86 SPW-4466 9/6/2017 Sr-90 32.5 +/- 2.1 33.8 27.0 - 40.6 Pass 0.96 SPW-4512 9/8/2017 Gr. Alpha 19.2 +/- 0.4 20.1 10.1 - 30.2 Pass 0.96 SPW-4512 9/8/2017 Gr. Beta 27.8 +/- 0.3 27.9 22.3 - 33.5 Pass 0.99 SPW-4586 9/9/2017 H-3 16,586 +/- 362 16,507 13,206 - 19,808 Pass 1.00 SPW-4720 9/16/2017 H-3 16,439 +/- 362 16,507 13,206 - 19,808 Pass 1.00 SPW-4834 9/22/2017 H-3 16,238 +/- 378 16,507 13,206 - 19,808 Pass 0.98 SPW-4935 9/27/2017 H-3 16,595 +/- 381 16,507 13,206 - 19,808 Pass 1.01 SPW-4937 9/27/2017 Ra-228 5.7 +/- 0.9 5.8 4.1 - 7.5 Pass 0.98 W-092717 4/29/2016 Cs-134 36.0 +/- 5.9 36.2 29.0 - 43.4 Pass 0.99 W-092717 4/29/2016 Cs-137 82.6 +/- 8.5 71.9 57.5 - 86.3 Pass 1.15 SPW-5001 9/29/2017 H-3 16,446 +/- 358 16,507 13,206 - 19,808 Pass 1.00 A3-3

TABLE A-3. In-House "Spiked" Samples Concentration a b

Lab Code Date Analysis Laboratory results Known Control Ratio 2s, n=1 c Activity Limits d Acceptance Lab/Known SPW-5134 10/6/2017 H-3 16,128 +/- 373 16,507 13,206 - 19,808 Pass 0.98 SPW-5274 10/12/2017 H-3 16,108 +/- 374 16,507 13,206 - 19,808 Pass 0.98 W-101217S 10/12/2017 Fe-55 1,491 +/- 77 1,482 1,186 - 1,778 Pass 1.01 SPW-5408 10/18/2017 Ni-63 203 +/-3 199 139.1 - 258.3 Pass 1.02 SPW-5430 10/19/2017 H-3 16,453 +/- 380 16,507 13,206 - 19,808 Pass 1.00 W-102017 4/29/2016 Cs-134 31.3 +/- 4.9 36.2 29.0 - 43.4 Pass 0.86 W-102017 4/29/2016 Cs-137 80.4 +/- 6.9 71.9 57.5 - 86.3 Pass 1.12 SPW-5674 10/25/2017 H-3 16,313 +/- 380 16,507 13,206 - 19,808 Pass 0.99 SPW-5719 10/27/2017 H-3 16,113 +/- 350 16,507 13,206 - 19,808 Pass 0.98 SPW-5730 10/31/2017 H-3 16,776 +/- 387 16,507 13,206 - 19,808 Pass 1.02 SPW-5944 10/27/2017 Ra-226 16.4 +/- 0.5 16.7 11.7 - 21.7 Pass 0.98 SPW-5915 11/9/2017 H-3 16,930 +/- 390 16,507 13,206 - 19,808 Pass 1.03 SPW-5989 11/11/2017 H-3 16,084 +/- 352 16,507 13,206 - 19,808 Pass 0.97 W-111417 4/29/2016 Cs-134 38.1 +/- 6.2 36.2 29.0 - 43.4 Pass 1.05 W-111417 4/29/2016 Cs-137 74.0 +/- 7.5 71.9 57.5 - 86.3 Pass 1.03 SPW-6121 11/16/2017 H-3 16,276 +/- 378 16,507 13,206 - 19,808 Pass 0.99 SPW-6132 11/20/2017 H-3 15,897 +/- 374 16,507 13,206 - 19,808 Pass 0.96 SPW-6249 11/30/2017 Ra-226 12.2 +/- 0.4 12.3 8.6 - 16.0 Pass 1.00 SPW-6226 12/1/2017 H-3 16,164 +/- 378 16,507 13,206 - 19,808 Pass 0.98 SPW-6318 12/7/2017 H-3 15,779 +/- 372 16,507 13,206 - 19,808 Pass 0.96 W-120817 4/29/2016 Cs-134 29.5 +/- 5.6 36.2 29.0 - 43.4 Pass 0.81 W-120817 4/29/2016 Cs-137 78.8 +/- 9.6 71.9 57.5 - 86.3 Pass 1.10 SPW-65 12/11/2017 Ra-226 12.5 +/- 0.4 12.3 8.6 - 16.0 Pass 1.01 SPW-6437 12/13/2017 Gr. Alpha 19.6 +/- 0.4 20.1 10.1 - 30.2 Pass 0.98 SPW-6437 12/13/2017 Gr. Beta 28.2 +/- 0.3 27.9 22.3 - 33.5 Pass 1.01 SPW-6463 12/15/2017 H-3 15,560 +/- 372 16,507 13,206 - 19,808 Pass 0.94 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 (Water), MI (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

d Control limits are listed in Attachment A of this report.

NOTE: For fish, gelatin is used for the spike matrix. For vegetation, cabbage is used for the spike matrix.

A3-4

TABLE A-4. In-House "Blank" Samples Concentration a b

Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityc Criteria (4.66 s)

SPW-31 Water 1/6/2017 H-3 143 71 +/- 75 200 SPW-45 Water 1/9/2017 Gr. Alpha 0.41 0.09 +/- 0.30 2 SPW-45 Water 1/9/2017 Gr. Beta 0.74 -0.56 +/- 0.50 4 SPW-91 Water 1/11/2017 H-3 151 -23 +/- 71 200 SPW-141 Water 1/12/2017 Sr-89 0.55 0.29 +/- 0.47 5 SPW-141 Water 1/12/2017 Sr-90 0.67 -0.02 +/- 0.31 1 SPW-154 Water 1/19/2017 H-3 155 -17 +/- 73 200 SPW-185 Water 1/23/2017 H-3 176 44 +/- 94 200 SPW-231 Water 1/19/2017 H-3 179 26 +/- 87 200 SPW-303 Water 1/26/2017 H-3 160 8 +/- 77 200 SPW-305 Water 1/4/2017 Ra-226 0.02 0.02 +/- 0.01 2 SPW-307 Water 1/27/2017 I-131 0.21 0.01 +/- 0.11 1.00 SPW-332 Water 1/30/2017 H-3 169 -52 +/- 86 200 SPW-352 Water 2/2/2017 U-234 0.14 0.00 +/- 0.08 1 SPW-352 Water 2/2/2017 U-238 0.14 0.12 +/- 0.15 1 SPW-411 Water 2/6/2017 Sr-89 0.49 0.30 +/- 0.35 5 SPW-411 Water 2/6/2017 Sr-90 0.52 -0.22 +/- 0.21 1 SPW-464 Water 2/8/2017 H-3 155 2 +/- 74 200 SPW-560 Water 2/15/2017 H-3 156 38 +/- 77 200 SPW-604 Water 2/16/2017 H-3 154 59 +/- 77 200 SPW-656 Water 2/17/2017 H-3 187 28 +/- 94 200 SPW-713 Water 2/23/2017 H-3 161 20 +/- 81 200 SPW-736 Water 2/28/2017 H-3 161 -75 +/- 76 200 SPAP-739 AP 2/28/2017 Gr. Beta 0.002 0.004 +/- 0.001 0.01 SPAP-741 AP 2/24/2017 Cs-134 2.27 -0.95 +/- 1.29 100 SPAP-741 AP 2/24/2017 Cs-137 2.65 0.17 +/- 1.67 100 SPW-747 Water 2/28/2017 C-14 161 -28 +/- 97 200 SPW-749 Water 2/28/2017 Ni-63 17 -3 +/- 10 200 SPF-751 Fish 2/28/2017 Cs-134 0.008 0.002 +/- 0.004 100 SPF-751 Fish 2/28/2017 Cs-137 0.008 0.000 +/- 0.005 100 SPW-780 Water 3/1/2017 Ra-226 0.02 0.02 +/- 0.01 2 SPW-782 Water 3/1/2017 H-3 154 35 +/- 78 200 SPW-3506 Water 3/1/2017 Ra-226 0.03 0.02 +/- 0.02 2 SPW-836 Water 3/3/2017 I-131 0.38 0.04 +/- 0.18 1 SPW-1009 Water 3/14/2017 H-3 154 -31 +/- 72 200 SPW-1025 Water 3/16/2017 Gr. Alpha 0.43 -0.16 +/- 0.28 2 SPW-1025 Water 3/16/2017 Gr. Beta 0.75 -0.24 +/- 0.52 4 SPW-1091 Water 3/21/2017 H-3 145 60 +/- 73 200 SPW-1150 Water 3/24/2017 H-3 152 -31 +/- 71 200 SPW-1162 Water 3/28/2017 Sr-89 0.61 -0.39 +/- 0.45 5 SPW-1162 Water 3/28/2017 Sr-90 0.52 0.18 +/- 0.27 1 a

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

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

c Activity reported is a net activity result.

A4-1

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

SPW-1177 Water 3/29/2017 Ra-228 0.83 -0.14 +/- 0.36 2 SPW-1231 Water 3/30/2017 H-3 150 24 +/- 73 200 SPW-1245 Water 3/31/2017 Cs-134 3.73 0.43 +/- 2.18 100 SPW-1245 Water 3/31/2017 Cs-137 3.01 -1.23 +/- 2.12 100 SPW-1245 Water 3/31/2017 I-131(G) 5.39 0.92 +/- 2.15 100 SPW-1245 Water 3/31/2017 I-131 0.32 0.03 +/- 0.18 1 SPMI-1247 Milk 3/31/2017 Cs-134 3.70 1.23 +/- 1.96 100 SPMI-1247 Milk 3/31/2017 Cs-137 3.62 -0.84 +/- 2.15 100 SPMI-1247 Milk 3/31/2017 I-131(G) 4.42 0.39 +/- 2.14 100 SPW-1294 Water 3/31/2017 Ra-226 0.02 0.18 +/- 0.02 2 SPW-1303 Water 4/4/2017 H-3 151 8 +/- 75 200 SPW-1377 Water 4/7/2017 H-3 150 29 +/- 72 200 SPW-1390 Water 4/7/2017 Gr. Alpha 0.42 0.15 +/- 0.31 2 SPW-1390 Water 4/7/2017 Gr. Beta 0.73 -0.17 +/- 0.51 4 SPW-1479 Water 4/12/2017 H-3 151 89 +/- 77 200 SPW-1574 Water 4/18/2017 H-3 144 55 +/- 79 200 SPW-1625 Water 4/20/2017 Sr-89 0.59 -0.01 +/- 0.50 5 SPW-1625 Water 4/20/2017 Sr-90 0.71 0.16 +/- 0.35 1 SPW-1657 Water 4/21/2017 H-3 147 34 +/- 73 200 SPW-1775 Water 4/26/2017 H-3 155 67 +/- 80 200 SPW-1805 Water 4/27/2017 H-3 153 15 +/- 74 200 SPW-1936 Water 5/3/2017 H-3 148 33 +/- 71 200 SPW-1970 Water 5/5/2017 Sr-89 0.66 0.34 +/- 0.54 5 SPW-1970 Water 5/5/2017 Sr-90 0.62 -0.08 +/- 0.28 1 SPW-2032 Water 5/8/2017 H-3 147 66 +/- 73 200 SPW-2419 Water 5/9/2017 Ra-226 0.03 0.01 +/- 0.03 2 SPW-2283 Water 5/22/2017 H-3 155 24 +/- 78 200 SPW-2353 Water 5/23/2017 H-3 151 56 +/- 76 200 SPW-2890 Water 5/23/2017 Ra-226 0.03 -0.01 +/- 0.02 2 SPMI-2377 Milk 5/24/2017 Sr-89 0.78 0.86 +/- 0.93 5 SPMI-2377 Milk 5/24/2017 Sr-90 0.49 0.95 +/- 0.33 1 SPW-2438 Water 5/25/2017 Ra-228 0.90 -0.28 +/- 0.38 2 SPW-2467 Water 5/26/2017 H-3 152 27 +/- 77 200 SPW-2417 Water 5/26/2017 Ra-228 0.80 1.58 +/- 0.54 2 SPW-2447 Water 5/26/2017 I-131 0.21 -0.05 +/- 0.12 1 SPW-2501 Water 6/1/2017 H-3 151 -23 +/- 70 200 SPW-2658 Water 6/5/2017 H-3 152 107 +/- 78 200 SPW-2789 Water 6/9/2017 H-3 150 52 +/- 77 200 SPW-2797 Water 6/12/2017 H-3 177 7 +/- 93 200 SPW-2847 Water 6/14/2017 I-131 0.18 0.03 +/- 0.10 1 a

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

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

c Activity reported is a net activity result.

A4-2

TABLE A-4. In-House "Blank" Samples Concentration a b

Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityc Criteria (4.66 s)

SPW-3508 Water 6/15/2017 Ra-226 0.03 0.00 +/- 0.02 2 SPW-2942 Water 6/19/2017 Sr-89 0.58 0.80 +/- 0.53 5 SPW-2942 Water 6/19/2017 Sr-90 0.50 0.15 +/- 0.25 1 SPW-3042 Water 6/23/2017 H-3 146 25 +/- 74 200 SPW-3510 Water 6/23/2017 Ra-226 0.02 0.03 +/- 0.02 2 SPW-3102 Water 6/28/2017 H-3 148 -7 +/- 73 200 SPW-3116 Water 6/29/2017 Tc-99 5.91 -0.39 +/- 3.58 10 SPW-3512 Water 6/29/2017 Ra-226 0.02 -0.01 +/- 0.02 2 SPW-3187 Water 7/3/2017 Sr-89 0.62 0.00 +/- 0.48 5 SPW-3187 Water 7/3/2017 Sr-90 0.48 0.07 +/- 0.23 1 SPW-3282 Water 7/11/2017 H-3 178 -37 +/- 84 200 SPW-4053 Water 7/11/2017 Ra-226 0.03 0.02 +/- 0.02 2 SPW-3466 Water 7/14/2017 Gr. Alpha 0.42 -0.09 +/- 0.28 2 SPW-3466 Water 7/14/2017 Gr. Beta 0.76 -0.18 +/- 0.53 4 SPW-3448 Water 7/15/2017 H-3 150 54 +/- 77 200 SPW-3727 Water 7/27/2017 Ni-63 90 18 +/- 55 200 SPW-3793 Water 7/28/2017 H-3 151 47 +/- 82 200 SPW-3904 Water 8/3/2017 Gr. Alpha 0.47 -0.02 +/- 0.33 2 SPW-3904 Water 8/3/2017 Gr. Beta 0.75 -0.11 +/- 0.52 4 SPW-4029 Water 8/9/2017 H-3 159 11 +/- 79 200 SPW-4206 Water 8/17/2017 H-3 157 55 +/- 76 200 SPW-4241 Water 8/19/2017 H-3 190 61 +/- 96 200 SPW-4085 Water 8/14/2017 H-3 159 -28 +/- 77 200 SPW-4206 Water 8/17/2017 H-3 157 55 +/- 76 200 SPW-4241 Water 8/19/2017 H-3 190 61 +/- 96 200 SPW-4457 Water 9/1/2017 Ra-228 0.78 -0.02 +/- 0.36 2 SPW-4465 Water 9/6/2017 Sr-89 0.51 0.30 +/- 0.37 5 SPW-4465 Water 9/6/2017 Sr-90 0.46 -0.09 +/- 0.20 1 SPW-4585 Water 9/9/2017 H-3 187 -86 +/- 83 200 SPW-5720 Water 9/13/2017 Ra-226 0.02 0.13 +/- 0.02 2 SPW-4703 Water 9/15/2017 I-131 0.17 0.10 +/- 0.10 1 SPW-4719 Water 9/16/2017 H-3 184 -86 +/- 93 200 SPW-4833 Water 9/22/2017 H-3 150 5 +/- 72 200 SPW-4934 Water 9/27/2017 H-3 148 5 +/- 70 200 SPW-4936 Water 9/27/2017 Ra-228 0.80 0.55 +/- 0.44 2 SPW-5000 Water 9/29/2017 H-3 183 -13 +/- 90 200 SPW-5133 Water 10/6/2017 H-3 144 64 +/- 71 200 SPW-5273 Water 10/12/2017 H-3 142 106 +/- 72 200 a

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

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

c Activity reported is a net activity result.

A4-3

TABLE A-4. In-House "Blank" Samples Concentration a b

Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityc Criteria (4.66 s)

SPW-5407 Water 10/18/2017 Ni-63 69 43 +/- 43 200 SPW-5429 Water 10/19/2017 H-3 148 54 +/- 72 200 SPW-5603 Water 10/23/2017 Sr-89 0.57 0.16 +/- 0.47 5 SPW-5603 Water 10/23/2017 Sr-90 0.70 -0.12 +/- 0.31 1 SPW-5673 Water 10/25/2017 H-3 156 -36 +/- 71 200 SPW-5718 Water 10/27/2017 H-3 182 45 +/- 92 200 SPW-5943 Water 10/27/2017 Ra-226 0.02 0.08 +/- 0.02 2 SPW-5723 Water 10/30/2017 I-131 0.10 0.03 +/- 0.07 1 SPW-5914 Water 11/09/17 H-3 149 -39 +/- 68 200 SPW-5988 Water 11/11/2017 H-3 183 -8 +/- 88 200 SPW-6120 Water 11/16/2017 H-3 146 83 +/- 75 200 SPW-6131 Water 11/20/2017 H-3 151 16 +/- 72 200 SPW-6197 Water 11/29/2017 I-131 0.38 0.01 +/- 0.18 1 SPW-6248 Water 11/30/2017 Ra-226 0.03 0.15 +/- 0.03 2 SPW-6225 Water 12/1/2017 H-3 154 -10 +/- 72 200 SPW-6317 Water 12/7/2017 H-3 148 44 +/- 74 200 SPW-64 Water 12/11/2017 Ra-226 0.03 0.18 +/- 0.03 2 SPW-6436 Water 12/13/2017 Gr. Alpha 0.54 -0.17 +/- 0.37 2 SPW-6436 Water 12/13/2017 Gr. Beta 0.74 0.12 +/- 0.52 4 SPW-6464 Water 12/15/2017 H-3 148 31 +/- 75 200 a

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

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

c Activity reported is a net activity result.

A4-4

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-7178,7179 1/3/2017 Be-7 0.047 +/- 0.015 0.062 +/- 0.017 0.054 +/- 0.012 Pass SW-6986,6987 1/3/2017 Gr. Beta 1.39 +/- 0.41 0.77 +/- 0.41 1.08 +/- 0.29 Pass E-66,67 1/3/2017 Gr. Beta 1.62 +/- 0.05 1.45 +/- 0.04 1.54 +/- 0.11 Pass E-66,67 1/3/2017 K-40 1.26 +/- 0.14 1.39 +/- 0.16 1.32 +/- 0.11 Pass CF-87,88 1/3/2017 Be-7 0.25 +/- 0.11 0.30 +/- 0.12 0.28 +/- 0.08 Pass CF-87,88 1/3/2017 K-40 7.77 +/- 0.39 6.84 +/- 0.37 7.31 +/- 0.27 Pass AP-011217 1/12/2017 Be-7 0.137 +/- 0.078 0.139 +/- 0.082 0.138 +/- 0.056 Pass MI-212,213 1/16/2017 K-40 1,515 +/- 98 1,347 +/- 107 1,431 +/- 73 Pass WW-321,322 1/19/2017 H-3 675 +/- 118 506 +/- 133 590 +/- 89 Pass WW-674,675 1/20/2017 H-3 7,326 +/- 254 7,717 +/- 259 7,522 +/- 181 Pass AP-012317 1/23/2017 Gr. Beta 0.034 +/- 0.005 0.038 +/- 0.005 0.036 +/- 0.004 Pass WW-298,299 1/24/2017 H-3 5,916 +/- 239 5764 +/- 237 5840 +/- 168 Pass AP-013117 1/30/2017 Gr. Beta 0.027 +/- 0.004 0.028 +/- 0.004 0.028 +/- 0.003 Pass WW-500,501 1/31/2017 H-3 1,058 +/- 122 1,054 +/- 121 1,056 +/- 86 Pass SW-391,392 1/31/2017 Gr. Beta 1.40 +/- 0.56 1.62 +/- 0.61 1.51 +/- 0.41 Pass SPS-370,371 2/1/2017 K-40 23.47 +/- 0.66 23.11 +/- 0.72 23.29 +/- 0.49 Pass AP-456,457 2/2/2017 Be-7 0.129 +/- 0.076 0.167 +/- 0.092 0.148 +/- 0.060 Pass AP-020217 2/2/2017 Gr. Beta 0.021 +/- 0.004 0.027 +/- 0.004 0.024 +/- 0.003 Pass SPS-414,415 2/3/2017 K-40 19.45 +/- 1.85 21.58 +/- 1.99 20.52 +/- 1.36 Pass AP-020617 2/6/2017 Gr. Beta 0.023 +/- 0.004 0.023 +/- 0.004 0.023 +/- 0.003 Pass AP-021417A 2/14/2017 Gr. Beta 0.031 +/- 0.004 0.030 +/- 0.004 0.030 +/- 0.003 Pass SPW-543 2/14/2017 Gr. Beta 7.99 +/- 0.82 9.45 +/- 0.88 8.72 +/- 0.60 Pass AP-021417B 2/14/2017 Gr. Beta 0.024 +/- 0.004 0.028 +/- 0.004 0.026 +/- 0.003 Pass WW-718,719 2/14/2017 H-3 737 +/- 113 643 +/- 110 690 +/- 79 Pass AP-022017 2/20/2017 Gr. Beta 0.018 +/- 0.005 0.021 +/- 0.005 0.020 +/- 0.004 Pass WW-755,756 2/22/2017 H-3 3,709 +/- 196 3,823 +/- 198 3,766 +/- 139 Pass AP-022717 2/27/2017 Gr. Beta 0.021 +/- 0.004 0.019 +/- 0.004 0.020 +/- 0.003 Pass SPDW-80011,2 3/2/2017 Ra-226 7.29 +/- 0.32 6.76 +/- 0.30 7.03 +/- 0.22 Pass SPDW-80011,2 3/2/2017 Ra-228 4.68 +/- 0.82 6.29 +/- 1.03 5.49 +/- 0.66 Pass SPDW-80013,4 3/2/2017 Gr. Alpha 13.57 +/- 1.43 12.44 +/- 1.37 13.01 +/- 0.99 Pass WW-845,846 3/2/2017 H-3 314 +/- 93 249 +/- 90 281 +/- 65 Pass AP-030617 3/6/2017 Gr. Beta 0.022 +/- 0.004 0.019 +/- 0.004 0.020 +/- 0.003 Pass WW-1050,1051 3/8/2017 H-3 14,994 +/- 364 14,745 +/- 362 14,870 +/- 257 Pass SPS-920,921 3/9/2017 K-40 23.30 +/- 1.76 23.13 +/- 1.64 23.21 +/- 1.20 Pass WW-1004,1005 3/13/2017 H-3 182 +/- 80 158 +/- 79 170 +/- 56 Pass SPS-1029,1030 3/15/2017 K-40 11.82 +/- 0.68 12.01 +/- 0.68 11.92 +/- 0.48 Pass AP-031517 3/15/2017 Gr. Beta 0.020 +/- 0.003 0.020 +/- 0.003 0.020 +/- 0.002 Pass SPDW-80037,8 3/20/2017 Gr. Alpha 4.54 +/- 0.82 5.29 +/- 0.91 4.91 +/- 0.61 Pass AP-032017 3/20/2017 Gr. Beta 0.021 +/- 0.006 0.021 +/- 0.006 0.021 +/- 0.005 Pass WW-1094,1095 3/20/2017 H-3 1,571 +/- 137 1,595 +/- 138 1,583 +/- 175 Pass A5-1

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance WW-1175,1176 3/20/2017 H-3 218 +/- 84 211 +/- 84 214 +/- 59 Pass WW-1129,1130 3/21/2017 Gr. Beta 3.51 +/- 1.24 2.99 +/- 1.17 3.25 +/- 0.85 Pass WW-1219,1220 3/22/2017 H-3 11,467 +/- 322 11,516 +/- 323 11,492 +/- 200 Pass SPS-1152,1153 3/27/2017 Ac-228 20.39 +/- 0.75 20.43 +/- 0.88 20.41 +/- 0.58 Pass SPS-1152,1153 3/27/2017 Pb-214 17.22 +/- 0.50 16.44 +/- 0.52 16.83 +/- 0.36 Pass SPDW-80047,8 3/28/2017 Ra-226 2.06 +/- 0.23 1.60 +/- 0.32 1.83 +/- 0.20 Pass SPDW-80047,8 3/28/2017 Ra-228 0.53 +/- 0.48 0.78 +/- 0.49 0.66 +/- 0.34 Pass SWU-1242,1243 3/28/2017 Gr. Beta 2.04 +/- 0.81 2.47 +/- 0.69 2.26 +/- 0.53 Pass SPS-1198,1199 3/29/2017 K-40 16.95 +/- 1.85 18.33 +/- 1.71 17.64 +/- 1.26 Pass SPDW-80050,1 3/29/2017 Gr. Alpha 3.19 +/- 0.80 3.39 +/- 0.78 3.29 +/- 0.56 Pass SPDW-80050,1 3/29/2017 Gr. Beta 1.58 +/- 0.60 2.08 +/- 0.63 1.83 +/- 0.44 Pass AP-1706,1707 3/30/2017 Be-7 0.068 +/- 0.018 0.072 +/- 0.017 0.070 +/- 0.012 Pass SW-1381,1382 4/5/2017 H-3 402 +/- 92 309 +/- 88 356 +/- 64 Pass WW-1446,1447 4/6/2017 H-3 305 +/- 89 358 +/- 91 332 +/- 64 Pass WW-1532,1533 4/10/2017 H-3 19,124 +/- 412 18,991 +/- 410 19,058 +/- 291 Pass WW-1618,1619 4/12/2017 H-3 4,187 +/- 203 4,305 +/- 205 4,246 +/- 144 Pass SS-1553,1554 4/13/2017 Gr. Beta 7.16 +/- 0.99 6.09 +/- 0.91 6.63 +/- 0.67 Pass SS-1553,1554 4/13/2017 K-40 4.60 +/- 0.32 4.84 +/- 0.34 4.72 +/- 0.23 Pass SS-1553,1554 4/13/2017 Tl-208 0.038 +/- 0.016 0.032 +/- 0.011 0.035 +/- 0.010 Pass SS-1553,1554 4/13/2017 Pb-212 0.101 +/- 0.015 0.096 +/- 0.015 0.098 +/- 0.010 Pass SS-1553,1554 4/13/2017 Bi-214 0.094 +/- 0.032 0.109 +/- 0.022 0.101 +/- 0.019 Pass SS-1553,1554 4/13/2017 Ac-228 0.089 +/- 0.042 0.111 +/- 0.046 0.100 +/- 0.031 Pass P-2015,2016 5/4/2017 H-3 189 +/- 80 212 +/- 81 200 +/- 57 Pass WW-2336,2337 5/8/2017 H-3 422 +/- 97 298 +/- 91 360 +/- 66 Pass AP-051117 5/11/2017 Gr. Beta 0.018 +/- 0.003 0.025 +/- 0.004 0.021 +/- 0.002 Pass WW-2497,2498 5/23/2017 H-3 1,268 +/- 127 1,247 +/- 126 1,257 +/- 89 Pass WW-2583,2584 5/23/2017 H-3 5,159 +/- 224 5,223 +/- 126 5,191 +/- 129 Pass WW-2732,2733 5/23/2017 H-3 8,559 +/- 282 8,570 +/- 283 8,564 +/- 200 Pass XW-1218,1219 5/23/2017 H-3 11,467 +/- 282 11,516 +/- 283 11,492 +/- 200 Pass MI-2428,2429 5/24/2017 K-40 1,752 +/- 137 1,805 +/- 132 1,778 +/- 95 Pass SO-2562,2563 5/24/2017 K-40 7.87 +/- 0.50 8.64 +/- 0.49 8.25 +/- 0.35 Pass WW-3023,3024 5/24/2017 H-3 27,398 +/- 486 27,733 +/- 489 27,565 +/- 344 Pass SO-2453,2454 5/25/2017 Gr. Beta 14.38 +/- 0.93 15.70 +/- 1.06 15.04 +/- 0.70 Pass SO-2453,2454 5/25/2017 Cs-137 0.17 +/- 0.03 0.18 +/- 0.03 0.17 +/- 0.02 Pass SO-2453,2454 5/25/2017 K-40 9.80 +/- 0.50 9.19 +/- 0.57 9.50 +/- 0.38 Pass SO-2453,2454 5/25/2017 Tl-208 0.09 +/- 0.02 0.10 +/- 0.03 0.09 +/- 0.02 Pass SO-2453,2454 5/25/2017 Pb-212 0.29 +/- 0.03 0.30 +/- 0.03 0.29 +/- 0.02 Pass SO-2453,2454 5/25/2017 Bi-214 0.24 +/- 0.03 0.18 +/- 0.04 0.21 +/- 0.03 Pass SO-2453,2454 5/25/2017 Ra-226 0.82 +/- 0.22 0.62 +/- 0.27 0.72 +/- 0.17 Pass SO-2453,2454 5/25/2017 Ac-228 0.32 +/- 0.07 0.28 +/- 0.08 0.30 +/- 0.05 Pass A5-2

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance SWT-2625,2626 5/30/2017 Gr. Beta 0.64 +/- 0.53 1.08 +/- 0.55 0.86 +/- 0.38 Pass AP-053117 5/31/2017 Gr. Beta 0.013 +/- 0.003 0.011 +/- 0.003 0.012 +/- 0.002 Pass G-2646,2647 6/1/2017 Be-7 1.02 +/- 0.17 1.06 +/- 0.26 1.04 +/- 0.15 Pass G-2646,2647 6/1/2017 K-40 7.51 +/- 0.49 6.55 +/- 0.51 7.03 +/- 0.36 Pass SL-2669,70 6/1/2017 Be-7 0.34 +/- 0.06 0.30 +/- 0.06 0.32 +/- 0.04 Pass SL-2669,70 6/1/2017 K-40 4.35 +/- 0.14 4.39 +/- 0.15 4.37 +/- 0.10 Pass F-2711,2712 6/2/2017 K-40 2.56 +/- 0.32 2.77 +/- 0.44 2.66 +/- 0.27 Pass AP-060617 6/6/2017 Gr. Beta 0.026 +/- 0.005 0.027 +/- 0.005 0.027 +/- 0.004 Pass SW-2849,50 6/8/2017 H-3 8,178 +/- 273 8,563 +/- 279 8,371 +/- 195 Pass AP-061217 6/12/2017 Gr. Beta 0.027 +/- 0.005 0.027 +/- 0.005 0.027 +/- 0.004 Pass BS-3446,3447 6/12/2017 K-40 8.30 +/- 0.47 8.57 +/- 0.47 8.44 +/- 0.33 Pass VE-2870,2871 6/13/2017 K-40 3.65 +/- 0.25 3.90 +/- 0.26 3.77 +/- 0.18 Pass AP-2914,5 6/15/2017 Be-7 0.269 +/- 0.146 0.212 +/- 0.123 0.240 +/- 0.095 Pass AP-3067,8 6/15/2017 Be-7 0.204 +/- 0.113 0.328 +/- 0.126 0.266 +/- 0.085 Pass AP-061917 6/19/2017 Gr. Beta 0.020 +/- 0.004 0.019 +/- 0.004 0.020 +/- 0.003 Pass AP-3610,1 6/26/2017 Be-7 0.107 +/- 0.015 0.116 +/- 0.021 0.111 +/- 0.013 Pass AP-062617 6/26/2017 Gr. Beta 0.017 +/- 0.004 0.021 +/- 0.004 0.019 +/- 0.003 Pass AP-3673,3674 7/3/2017 Be-7 0.087 +/- 0.008 0.078 +/- 0.008 0.083 +/- 0.006 Pass AP-3287,3288 7/6/2017 Be-7 0.207 +/- 0.112 0.244 +/- 0.096 0.226 +/- 0.074 Pass WW-3308,3309 7/7/2017 H-3 549 +/- 108 501 +/- 107 525 +/- 76 Pass VE-3362,3363 7/12/2017 K-40 2.32 +/- 0.17 2.40 +/- 0.16 2.36 +/- 0.12 Pass VE-3589,3590 7/18/2017 K-40 5.25 +/- 0.33 4.64 +/- 0.33 4.94 +/- 0.23 Pass SG-3631,3632 7/18/2017 Pb-214 3.03 +/- 0.11 2.97 +/- 0.11 3.00 +/- 0.08 Pass SG-3631,3632 7/18/2017 Ac-228 2.47 +/- 0.22 2.56 +/- 0.23 2.52 +/- 0.16 Pass WW-3846,3847 7/25/2017 H-3 505 +/- 101 446 +/- 98 475 +/- 70 Pass F-4509,4510 7/26/2017 K-40 0.85 +/- 0.25 1.00 +/- 0.25 0.93 +/- 0.18 Pass F-4509,4510 7/26/2017 Gr. Beta 1.19 +/- 0.03 1.18 +/- 0.03 1.18 +/- 0.02 Pass G-3804,3805 7/27/2017 Be-7 3.72 +/- 0.39 3.47 +/- 0.40 3.59 +/- 0.28 Pass G-3804,3805 7/27/2017 K-40 4.21 +/- 0.52 4.46 +/- 0.52 4.34 +/- 0.33 Pass SL-3888,3889 8/1/2017 Be-7 0.77 +/- 0.04 0.73 +/- 0.07 0.75 +/- 0.04 Pass SL-3888,3889 8/1/2017 K-40 0.94 +/- 0.04 0.87 +/- 0.08 0.90 +/- 0.23 Pass WW-4158,4159 8/8/2017 H-3 321 +/- 90 270 +/- 88 295 +/- 63 Pass VE-4179,4180 8/14/2017 K-40 1.84 +/- 0.18 1.90 +/- 0.21 1.87 +/- 0.14 Pass AP-4289,4290 8/17/2017 Be-7 0.212 +/- 0.095 0.162 +/- 0.080 0.187 +/- 0.062 Pass F-4333,4334 8/18/2017 K-40 3.22 +/- 0.41 3.62 +/- 0.42 3.42 +/- 0.29 Pass CF-4310,4311 8/21/2017 K-40 10.94 +/- 0.74 11.48 +/- 0.50 11.21 +/- 0.45 Pass DW-80161,80162 8/22/2017 Ra-226 1.22 +/- 0.15 1.19 +/- 0.17 1.21 +/- 0.11 Pass DW-80161,80162 8/22/2017 Ra-228 1.99 +/- 0.63 0.70 +/- 0.49 1.35 +/- 0.40 Pass VE-4398,4399 8/28/2017 Be-7 0.13 +/- 0.07 0.13 +/- 0.08 0.13 +/- 0.05 Pass A5-3

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance VE-4398,4399 8/28/2017 K-40 3.32 +/- 0.22 3.48 +/- 0.25 3.40 +/- 0.17 Pass SW-4463,4464 8/29/2017 H-3 495 +/- 106 491 +/- 106 493 +/- 75 Pass LW-4486,4487 8/31/2017 Gr. Beta 0.425 +/- 0.471 1.358 +/- 0.571 0.892 +/- 0.370 Pass VE-4561,4562 9/6/2017 Be-7 5.89 +/- 0.29 5.76 +/- 0.25 5.83 +/- 0.19 Pass VE-4561,4562 9/6/2017 K-40 3.73 +/- 0.34 3.77 +/- 0.29 3.75 +/- 0.22 Pass BO-5122,5123 9/8/2017 K-40 4.50 +/- 0.36 4.50 +/- 0.36 4.50 +/- 0.25 Pass VE-4692,4693 9/12/2017 K-40 5.16 +/- 0.13 5.31 +/- 0.36 5.24 +/- 0.19 Pass SS-4650,4651 9/12/2017 K-40 10.55 +/- 0.51 10.41 +/- 0.54 10.48 +/- 0.37 Pass MI-4671,4672 9/13/2017 K-40 1,347 +/- 115 1,283 +/- 118 1,315 +/- 82 Pass MI-4671,4672 9/13/2017 Sr-90 0.7 +/- 0.3 0.5 +/- 0.3 0.6 +/- 0.2 Pass VE-4973,4974 9/17/2017 K-40 1.11 +/- 0.15 1.17 +/- 0.13 1.14 +/- 0.10 Pass F-4928,4929 9/19/2017 K-40 1.84 +/- 0.31 1.68 +/- 0.34 1.76 +/- 0.23 Pass S-4865,4866 9/20/2017 K-40 21.07 +/- 2.39 19.09 +/- 2.51 20.08 +/- 1.73 Pass VE-4907,4908 9/20/2017 K-40 3.83 +/- 0.44 4.28 +/- 0.31 4.05 +/- 0.27 Pass VE-4844,4845 9/21/2017 K-40 1.81 +/- 0.22 1.88 +/- 0.21 1.84 +/- 0.15 Pass AP-5572,5573 9/27/2017 Be-7 0.082 +/- 0.015 0.075 +/- 0.014 0.078 +/- 0.010 Pass LW-5145,5146 9/28/2017 Gr. Beta 0.84 +/- 0.49 1.47 +/- 0.57 1.16 +/- 0.38 Pass AP-092917 9/29/2017 Gr. Beta 0.038 +/- 0.004 0.031 +/- 0.004 0.035 +/- 0.003 Pass WW-5080,5081 10/2/2017 H-3 208 +/- 79 223 +/- 80 215 +/- 56 Pass AP-100217 10/2/2017 Gr. Beta 0.025 +/- 0.005 0.028 +/- 0.005 0.026 +/- 0.003 Pass AP-100317 10/3/2017 Gr. Beta 0.037 +/- 0.004 0.033 +/- 0.004 0.035 +/- 0.003 Pass S-5165,5166 10/4/2017 K-40 15.93 +/- 2.30 20.34 +/- 3.15 18.14 +/- 1.95 Pass VE-5228,5229 10/5/2017 K-40 3.25 +/- 0.25 2.82 +/- 0.24 3.04 +/- 0.17 Pass AP-100917 10/9/2017 Gr. Beta 0.021 +/- 0.004 0.025 +/- 0.004 0.023 +/- 0.003 Pass VE-5293,5294 10/10/2017 K-40 3.89 +/- 0.30 4.08 +/- 0.34 3.99 +/- 0.22 Pass DW-80184,80185 10/11/2017 Gr. Alpha 2.17 +/- 0.81 2.50 +/- 0.81 2.34 +/- 0.57 Pass DW-80184,80185 10/11/2017 Gr. Beta 9.45 +/- 0.79 10.20 +/- 0.83 9.83 +/- 0.57 Pass S-5421,5422 10/12/2017 K-40 8.82 +/- 1.94 7.97 +/- 0.72 8.40 +/- 1.03 Pass AP-101617 10/16/2017 Gr. Beta 0.025 +/- 0.005 0.022 +/- 0.004 0.024 +/- 0.003 Pass F-5658,5659 10/19/2017 K-40 2.44 +/- 0.41 2.57 +/- 0.39 2.51 +/- 0.28 Pass SO-5704,5705 10/25/2017 Cs-137 0.05 +/- 0.02 0.04 +/- 0.02 0.04 +/- 0.01 Pass SO-5704,5705 10/25/2017 K-40 10.08 +/- 0.51 9.57 +/- 0.56 9.83 +/- 0.38 Pass SO-5704,5705 10/25/2017 Tl-208 0.10 +/- 0.02 0.09 +/- 0.02 0.10 +/- 0.01 Pass SO-5704,5705 10/25/2017 Bi-214 0.34 +/- 0.04 0.27 +/- 0.04 0.30 +/- 0.03 Pass SO-5704,5705 10/25/2017 Pb-212 0.28 +/- 0.03 0.27 +/- 0.03 0.27 +/- 0.02 Pass SO-5704,5705 10/25/2017 Ra-226 1.15 +/- 0.52 0.59 +/- 0.22 0.87 +/- 0.28 Pass SO-5704,5705 10/25/2017 Ac-228 0.33 +/- 0.05 0.31 +/- 0.07 0.32 +/- 0.04 Pass SO-5704,5705 10/25/2017 Gr. Beta 18.34 +/- 1.80 16.50 +/- 1.03 17.42 +/- 1.04 Pass AP-5732,5733 10/26/2017 Be-7 0.139 +/- 0.064 0.175 +/- 0.075 0.157 +/- 0.049 Pass A5-4

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance SW-5753,5754 10/31/2017 H-3 220 +/- 83 279 +/- 86 249 +/- 60 Pass SWU-5816,5817 10/31/2017 Gr. Beta 1.51 +/- 1.00 2.02 +/- 1.02 1.76 +/- 0.71 Pass AP-103117 10/31/2017 Gr. Beta 0.015 +/- 0.004 0.014 +/- 0.004 0.015 +/- 0.003 Pass SO-5923,5924 11/1/2017 Cs-137 0.30 +/- 0.04 0.31 +/- 0.04 0.31 +/- 0.03 Pass SO-5923,5924 11/1/2017 K-40 10.52 +/- 0.61 10.56 +/- 0.67 10.54 +/- 0.45 Pass AP-5858,5859 11/2/2017 Be-7 0.145 +/- 0.075 0.146 +/- 0.084 0.145 +/- 0.056 Pass AP-110717 11/7/2017 Be-7 0.026 +/- 0.004 0.030 +/- 0.004 0.028 +/- 0.003 Pass WW-6032,6033 11/7/2017 H-3 204 +/- 86 298 +/- 80 251 +/- 59 Pass WW-6074,6075 11/8/2017 H-3 72,247 +/- 786 73,062 +/- 791 72,655 +/- 558 Pass BS-6053,6054 11/13/2017 K-40 7.99 +/- 0.62 9.20 +/- 0.68 8.60 +/- 0.46 Pass BS-6053,6054 11/13/2017 Cs-137 0.07 +/- 0.03 0.08 +/- 0.03 0.07 +/- 0.02 Pass DW-80211,80212 11/14/2017 Gr. Alpha 2.30 +/- 0.80 3.60 +/- 1.00 2.95 +/- 0.64 Pass DW-80211,80212 11/14/2017 Gr. Beta 9.32 +/- 0.81 8.99 +/- 0.81 9.16 +/- 0.57 Pass DW-80214,80215 11/14/2017 Ra-226 1.36 +/- 0.22 1.35 +/- 0.15 1.355 +/- 0.13 Pass DW-80214,80215 11/14/2017 Ra-228 1.41 +/- 0.51 0.90 +/- 0.45 1.16 +/- 0.34 Pass WW-6152,6153 11/15/2017 H-3 416 +/- 94 328 +/- 90 372 +/- 65 Pass SWU-6219,6220 11/28/2017 Gr. Beta 1.04 +/- 0.54 1.75 +/- 0.58 1.39 +/- 0.39 Pass SS-6242,6243 11/29/2017 K-40 24.17 +/- 1.05 22.31 +/- 1.03 23.24 +/- 0.74 Pass SS-6242,6243 11/29/2017 Cs-137 0.11 +/- 0.03 0.08 +/- 0.03 0.10 +/- 0.02 Pass SG-6938,6939 11/28/2017 Pb-214 15.28 +/- 0.34 14.96 +/- 0.43 15.12 +/- 0.27 Pass SG-6938,6939 11/28/2017 Ac-228 18.99 +/- 0.59 19.92 +/- 0.79 19.46 +/- 0.49 Pass AP-112817 11/28/2017 Gr. Beta 0.026 +/- 0.004 0.030 +/- 0.004 0.028 +/- 0.003 Pass SQ-6286,6287 12/1/2017 Gr. Alpha 70.6 +/- 6.2 60.9 +/- 6.0 65.8 +/- 4.3 Pass SQ-6286,6287 12/1/2017 Gr. Beta 48.9 +/- 2.7 53.7 +/- 2.8 51.3 +/- 1.9 Pass SQ-6286,6287 12/1/2017 Ra-226 11.3 +/- 0.4 10.7 +/- 0.5 11.0 +/- 0.3 Pass SQ-6286,6287 12/1/2017 Ra-228 13.5 +/- 0.9 13.2 +/- 1.0 13.4 +/- 0.7 Pass SG-6286,6287 12/1/2017 K-40 5.10 +/- 1.82 6.65 +/- 1.53 5.88 +/- 1.19 Pass AP-120417 12/4/2017 Gr. Beta 0.037 +/- 0.006 0.035 +/- 0.005 0.036 +/- 0.004 Pass WW-6548,6549 12/19/2017 H-3 8,428 +/- 280 8,604 +/- 282 8,516 +/- 199 Pass AP-122717 12/27/2017 Gr. Beta 0.047 +/- 0.004 0.043 +/- 0.004 0.045 +/- 0.003 Pass XAP-6762,6763 12/31/2017 Co-60 2.43 +/- 1.30 2.24 +/- 0.82 2.34 +/- 0.77 Pass XAP-6762,6763 12/31/2017 Cs-137 4.21 +/- 1.11 4.05 +/- 0.96 4.14 +/- 0.73 Pass Note: Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

a Results are reported in units of pCi/L, except for air filters (pCi/Filter or pCi/m3), food products, vegetation, soil and sediment (pCi/g).

A5-5

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

Concentration a Reference Known Control b

Lab Code Date Analysis Laboratory result Activity Limits c Acceptance MASO-903 2/1/2017 Am-241 60.9 +/- 6.9 67.0 46.9 - 87.1 Pass MASO-903 2/1/2017 Cs-134 1360 +/- 14 1550 1085 - 2015 Pass MASO-903 2/1/2017 Cs-137 678 +/- 13 611 428 - 794 Pass MASO-903 2/1/2017 Co-57 1.63 +/- 1.69 0.00 NA c Pass MASO-903 2/1/2017 Co-60 909 +/- 12 891 624 - 1158 Pass MASO-903 2/1/2017 Mn-54 1052 +/- 17 967 677 - 1257 Pass MASO-903 2/1/2017 K-40 657 +/- 68 607 425 - 789 Pass MASO-903 2/1/2017 Zn-65 -0.52 +/- 7.40 0.00 NA c Pass MASO-903 2/1/2017 Ni-63 3.25 +/- 7.17 0.00 NA c Pass MASO-903 2/1/2017 Pu-238 0.46 +/- 0.69 0.41 NA e Pass MASO-903 2/1/2017 Pu-239/240 56.8 +/- 5.9 59.8 41.9 - 77.7 Pass MASO-903 2/1/2017 Sr-90 501 +/- 17 624 437 - 811 Pass MASO-903 2/1/2017 Tc-99 748 +/- 16 656 459 - 853 Pass MAW-849 2/1/2017 I-129 -0.05 +/- 0.12 0.00 NA c Pass MAVE-905 2/1/2017 Cs-134 6.61 +/- 0.16 6.95 4.87 - 9.04 Pass MAVE-905 2/1/2017 Cs-137 4.97 +/- 0.18 4.60 3.22 - 5.98 Pass MAVE-905 2/1/2017 Co-57 -0.01 +/- 0.03 0.00 NA c Pass MAVE-905 2/1/2017 Co-60 9.51 +/- 0.17 8.75 6.13 - 11.38 Pass MAVE-905 2/1/2017 Mn-54 3.67 +/- 0.17 3.28 2.30 - 4.26 Pass MAVE-905 2/1/2017 Zn-65 6.12 +/- 0.44 5.39 3.77 - 7.01 Pass MAW-847 2/1/2017 Am-241 0.679 +/- 0.079 0.846 0.592 - 1.100 Pass MAW-847 2/1/2017 Cs-134 0.03 +/- 0.10 0.00 NA c Pass MAW-847 2/1/2017 Cs-137 12.7 +/- 0.4 11.1 7.8 - 14.4 Pass MAW-847d 2/1/2017 Co-57 2.7 +/- 0.3 28.5 20.0 - 37.1 Fail MAW-847 2/1/2017 Co-60 13.5 +/- 0.3 12.3 8.6 - 16.0 Pass MAW-847 2/1/2017 Mn-54 16.5 +/- 0.4 14.9 10.4 - 19.4 Pass MAW-847 2/1/2017 K-40 287 +/-6 254 178 - 330 Pass MAW-847 2/1/2017 Zn-65 -0.15 +/- 0.23 0.00 NA c Pass MAW-847 2/1/2017 H-3 275 +/- 10 249 174 - 324 Pass MAW-847 2/1/2017 Fe-55 2.4 +/- 13.6 1.7 NA e Pass MAW-847 2/1/2017 Ni-63 10.1 +/- 2.8 12.2 8.5 - 15.9 Pass MAW-847 2/1/2017 Pu-238 0.729 +/- 0.097 0.703 0.492 - 0.914 Pass MAW-847 2/1/2017 Pu-239/240 0.866 +/- 0.102 0.934 0.654 - 1.214 Pass MAW-847 2/1/2017 Ra-226 0.506 +/- 0.053 0.504 0.353 - 0.655 Pass MAW-847 2/1/2017 Sr-90 10.0 +/- 0.8 10.1 7.1 - 13.1 Pass A6-1

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

Concentration a Reference Known Control b

Lab Code Date Analysis Laboratory result Activity Limits c Acceptance MAW-847 2/1/2017 Tc-99 4.77 +/- 0.62 6.25 4.38 - 8.13 Pass MAW-847 2/1/2017 U-234/233 1.19 +/- 0.10 1.16 0.81 - 1.51 Pass MAW-847 2/1/2017 U-238 1.15 +/- 0.10 1.20 0.84 - 1.56 Pass MAAP-907f 2/1/2017 Am-241 0.0540 +/- 0.0140 0.0376 0.0263 - 0.0489 Fail MAAP-907 2/1/2017 Cs-134 1.31 +/- 0.06 1.42 0.99 - 1.85 Pass MAAP-907 2/1/2017 Cs-137 0.797 +/- 0.080 0.685 0.480 - 0.891 Pass MAAP-907 2/1/2017 Co-57 1.86 +/- 0.06 1.70 1.19 - 2.21 Pass MAAP-907 2/1/2017 Co-60 0.86 +/- 0.05 0.78 0.55 - 1.01 Pass MAAP-907 2/1/2017 Mn-54 0.01 +/- 0.03 0.00 NA c Pass MAAP-907 2/1/2017 Zn-65 1.62 +/- 0.13 1.29 0.90 - 1.68 Pass MAAP-907 2/1/2017 Pu-238 0.0530 +/- 0.0190 0.0598 0.0419 - 0.0777 Pass MAAP-907 2/1/2017 Pu-239/240 0.0490 +/- 0.0160 0.0460 0.0322 - 0.0598 Pass MAAP-907 2/1/2017 Sr-90 0.648 +/- 0.120 0.651 0.456 - 0.846 Pass MAAP-907 2/1/2017 U-234/233 0.086 +/- 0.024 0.104 0.073 - 0.135 Pass MAAP-907 2/1/2017 U-238 0.097 +/- 0.024 0.107 0.075 - 0.139 Pass MASO-4515 8/1/2017 Am-241 45.9 +/- 7.0 58.8 41.2 - 76.4 Passg MASO-4515 8/1/2017 Cs-134 409 +/-7 448 314 - 582 Passg MASO-4515 8/1/2017 Cs-137 798 +/- 12 722 505 - 939 Passg MASO-4515 8/1/2017 Co-57 1572 +/- 10 1458 1021 - 1895 Passg MASO-4515 8/1/2017 Co-60 0.2 +/- 1.4 0.00 NA c Passg MASO-4515 8/1/2017 Mn-54 934 +/- 13 825 578 - 1073 Passg MASO-4515 8/1/2017 K-40 704 +/- 53 592 414 - 770 Passg MASO-4515 8/1/2017 Zn-65 667 +/- 17 559 391 - 727 Passg MASO-4515 8/1/2017 Pu-238 101 +/-9 92 64 - 120 Passg MASO-4515 8/1/2017 Pu-239/240 74.8 +/- 7.7 68.8 48.2 - 89.4 Passg MASO-4515 8/1/2017 Sr-90 252 +/-7 289 202 - 376 Passg MAW-4494 8/1/2017 I-129 2.31 +/- 0.10 2.31 1.62 - 3.00 Pass MAVE-4517 8/1/2017 Cs-134 2.40 +/- 0.10 2.32 1.62 - 3.02 Pass MAVE-4517 8/1/2017 Cs-137 -0.002 +/- 0.048 0.000 NA c Pass MAVE-4517 8/1/2017 Co-57 3.3 +/- 0.1 2.8 2.0 - 3.6 Pass MAVE-4517 8/1/2017 Co-60 2.10 +/- 0.10 2.07 1.45 - 2.69 Pass MAVE-4517 8/1/2017 Mn-54 3.00 +/- 0.20 2.62 1.83 - 3.41 Pass MAVE-4517 8/1/2017 Zn-65 5.90 +/- 0.30 5.37 3.76 - 6.98 Pass A6-2

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

Concentration a Reference Known Control b

Lab Code Date Analysis Laboratory result Activity Limits c Acceptance MAW-4513 8/1/2017 Am-241 0.820 +/- 0.220 0.892 0.624 - 1.160 Pass MAW-4513 8/1/2017 Cs-134 10.3 +/- 0.3 11.5 8.1 - 15.0 Pass MAW-4513 8/1/2017 Cs-137 17.2 +/- 0.5 16.3 11.4 - 21.2 Pass MAW-4513 8/1/2017 Co-57 12.7 +/- 0.4 12.1 8.5 - 15.7 Pass MAW-4513 8/1/2017 Co-60 10.6 +/- 0.3 10.7 7.5 - 13.9 Pass MAW-4513 8/1/2017 Mn-54 15.6 +/- 0.4 14.9 10.4 - 19.4 Pass MAW-4513 8/1/2017 Zn-65 15.9 +/- 0.7 15.5 10.9 - 20.2 Pass MAW-4513 8/1/2017 H-3 255 +/-9 258 181 - 335 Pass MAW-4513 8/1/2017 Fe-55 21.6 +/- 6.6 19.4 13.6 - 25.2 Pass MAW-4513 8/1/2017 Ni-63 -0.1 +/- 2.0 0.0 NA c Pass MAW-4513 8/1/2017 Pu-238 0.590 +/- 0.080 0.603 0.422 - 0.784 Pass MAW-4513 8/1/2017 Pu-239/240 0.740 +/- 0.090 0.781 0.547 - 1.015 Pass MAW-4513 8/1/2017 Ra-226 1.000 +/- 0.100 0.858 0.601 - 1.115 Pass MAW-4513 8/1/2017 Sr-90 7.80 +/- 0.60 7.77 5.44 - 10.10 Pass MAW-4513 8/1/2017 Tc-99 6.70 +/- 0.40 6.73 4.71 - 8.75 Pass MAW-4513 8/1/2017 U-2344/233 0.94 +/- 0.06 1.01 0.71 - 1.31 Pass MAW-4513 8/1/2017 U-238 0.97 +/- 0.07 1.04 0.73 - 1.35 Pass MAAP-4519h 8/1/2017 Am-241 0.0400 +/- 0.0100 0.0612 0.0428 - 0.0796 Fail MAAP-4519 8/1/2017 Cs-134 0.90 +/- 0.10 1.00 0.70 - 1.30 Pass MAAP-4519 8/1/2017 Cs-137 0.90 +/- 0.10 0.82 0.57 - 1.07 Pass MAAP-4519 8/1/2017 Co-57 0.01 +/- 0.01 0.00 NA c Pass MAAP-4519 8/1/2017 Co-60 0.70 +/- 0.10 0.68 0.48 - 0.88 Pass MAAP-4519 8/1/2017 Mn-54 1.50 +/- 0.10 1.30 0.91 - 1.69 Pass MAAP-4519 8/1/2017 Zn-65 1.30 +/- 0.10 1.08 0.76 - 1.40 Pass MAAP-4519 8/1/2017 Pu-238 0.0300 +/- 0.0100 0.0298 0.0209 - 0.0387 Pass MAAP-4519 8/1/2017 Pu-239/240 0.0400 +/- 0.0200 0.0468 0.0328 - 0.0608 Pass MAAP-4519 8/1/2017 Sr-90 0.800 +/- 0.100 0.801 0.561 - 1.041 Pass MAAP-4519 8/1/2017 U-234/233 0.070 +/- 0.010 0.084 0.059 - 0.109 Pass MAAP-4519 8/1/2017 U-238 0.090 +/- 0.010 0.087 0.061 - 0.113 Pass 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), MAAP (air filter), MASO (soil), 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.

d Decimal point was misplaced while performing a unit conversion. The result is within control limits when the proper unit conversion is performed.

e Provided in the series for "sensitivity evaluation". MAPEP does not provide control limits.

f Sample was reanalyzed in duplicate with acceptable results. Original plating was inferior to platings obtained during reanalysis.

It is believed that isotopic tracer was not accurately quantified due to poor resolution of its peak.

g Data were erroneously submitted in units of Bq/g. All results pass MAPEP criteria when evaluated in units of Bq/Kg.

h Laboratory is not currently offering analysis for Am-241 in Air Particulate samples.

A6-3

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

MRAD Study Concentration a b

Lab Code Date Analysis Laboratory ERA Control Result Result Limits c Acceptance ERAP-1112 3/20/2017 Am-241 55.3 +/- 2.8 76.4 47.1 - 103.0 Pass ERAP-1112 3/20/2017 Co-60 1,230 +/- 8 1030 797 - 1290 Pass ERAP-1112 3/20/2017 Cs-134 1,110 +/- 9 1100 700 - 1360 Pass ERAP-1112 3/20/2017 Cs-137 1,810 +/- 12 1,390 1,040 - 1,830 Pass ERAP-1112 d 3/20/2017 Fe-55 590 +/- 385 256 79.4 - 500 Fail ERAP-1112 3/20/2017 Mn-54 < 5.14 < 50.0 0.00 - 50.0 Pass ERAP-1112 3/20/2017 Pu-238 54.6 +/- 2.8 54.3 37.2 - 71.4 Pass ERAP-1112 3/20/2017 Pu-239/240 63.6 +/- 3.0 62.0 44.9 - 81.0 Pass ERAP-1112 3/20/2017 Sr-90 55.3 +/- 8.3 52.4 25.6 - 78.5 Pass ERAP-1112 3/20/2017 U-233/234 65.7 +/- 3.0 73.1 45.3 - 110 Pass ERAP-1112 3/20/2017 U-238 67.3 +/- 3.0 72.4 46.8 - 100 Pass ERAP-1112 3/20/2017 Zn-65 1,355 +/- 16 984 705 - 1,360 Pass ERAP-1114 3/20/2017 Gr. Alpha 106 +/- 5 85.5 28.6 - 133 Pass ERAP-1114 e 3/20/2017 Gr. Beta 67.6 +/- 3.0 45.2 28.6 - 65.9 Fail ERSO-1116 3/20/2017 Am-241 418 +/- 98 448 262 - 582 Pass ERSO-1116 3/20/2017 Ac-228 1,540 +/- 260 1,240 795 - 1,720 Pass ERSO-1116 3/20/2017 Bi-212 1,550 +/- 90 1,240 330 - 1,820 Pass ERSO-1116 3/20/2017 Bi-214 2,560 +/- 20 2,750 1,660 - 3,960 Pass ERSO-1116 3/20/2017 Co-60 4,620 +/- 100 4,430 3,000 - 6,100 Pass ERSO-1116 3/20/2017 Cs-134 8,340 +/- 100 8,860 5,790 - 10,600 Pass ERSO-1116 3/20/2017 Cs-137 8,420 +/- 100 7,500 5,750 - 9,650 Pass ERSO-1116 3/20/2017 K-40 13,600 +/- 900 10,600 7,740 - 14,200 Pass ERSO-1116 3/20/2017 Mn-54 < 68.1 < 1000 0.00 - 1,000 Pass ERSO-1116 3/20/2017 Pb-212 1,060 +/- 70 1,240 812 - 1,730 Pass ERSO-1116 3/20/2017 Pb-214 2,620 +/- 160 2,890 1,690 - 4,310 Pass ERSO-1116 3/20/2017 Pu-238 424 +/- 154 648 390 - 894 Pass ERSO-1116 f 3/20/2017 Pu-239/240 252 +/- 112 484 316 - 669 Fail ERSO-1116 g 3/20/2017 Pu-239/240 436 +/- 106 484 316 - 669 Pass ERSO-1116 3/20/2017 Sr-90 7,930 +/- 250 9,150 3,490 - 14,500 Pass ERSO-1116 3/20/2017 Th-234 1,820 +/- 200 1,940 614 - 3,650 Pass ERSO-1116 h 3/20/2017 U-233/234 1,030 +/- 130 1,950 1,190 - 2,500 Fail ERSO-1116 i 3/20/2017 U-233/234 1,820 +/- 200 1,950 1,190 - 2,500 Pass ERSO-1116 3/20/2017 U-238 1,240 +/- 140 1,940 1,200 - 2,460 Pass ERSO-1116 i 3/20/2017 U-238 1,930 +/- 200 1,940 1,200 - 2,460 Pass ERSO-1116 3/20/2017 Zn-65 7,190 +/- 240 6,090 4,850 - 8,090 Pass ERW-1122 3/20/2017 Gr. Alpha 65.3 +/- 2.4 89.5 31.8 - 139 Pass ERW-1122 3/20/2017 Gr. Beta 54.8 +/- 1.5 61.0 34.9 - 90.4 Pass ERW-1124 3/20/2017 H-3 19,000 +/- 410 19,400 13,000 - 27,700 Pass A7-1

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

MRAD Study Concentration a b

Lab Code Date Analysis Laboratory ERA Control Result Result Limits c Acceptance ERVE-1118 3/20/2017 Am-241 1,560 +/- 140 1,860 1,140 - 2,470 Pass ERVE-1118 3/20/2017 Cm-244 530 +/- 80 734 360 - 1,140 Pass ERVE-1118 3/20/2017 Co-60 1,400 +/- 350 1,390 959 - 1,940 Pass ERVE-1118 3/20/2017 Cs-134 1,650 +/- 460 1,830 1,180 - 2,380 Pass ERVE-1118 3/20/2017 Cs-137 2,580 +/- 540 2,500 1,810 - 3,480 Pass ERVE-1118 3/20/2017 K-40 32,100 +/- 700 30,900 22,300 - 43,400 Pass ERVE-1118 3/20/2017 Mn-54 < 27.3 < 300 0.00 - 300 Pass ERVE-1118 3/20/2017 Zn-65 889 +/- 64 853 615 - 1,200 Pass ERVE-1118 3/20/2017 Pu-238 3,250 +/- 210 3,250 1,940 - 4,450 Pass ERVE-1118 3/20/2017 Pu-239/240 2,180 +/- 170 2,150 1,320 - 2,960 Pass ERVE-1118 3/20/2017 Sr-90 665 +/- 135 726 414 - 963 Pass ERVE-1118 3/20/2017 U-233/234 2,840 +/- 200 3,090 2,030 - 3,970 Pass ERVE-1118 3/20/2017 U-238 2,990 +/- 200 3,060 2,040 - 3,890 Pass ERW-1120 3/20/2017 Am-241 108 +/- 7 140 94.3 - 188 Pass ERW-1120 3/20/2017 Co-60 2,600 +/- 198 2,540 2,210 - 2,970 Pass ERW-1120 3/20/2017 Cs-134 2,380 +/- 250 2,510 1,840 - 2880 Pass ERW-1120 3/20/2017 Cs-137 1,470 +/- 243 1,400 1,190 - 1,680 Pass ERW-1120 3/20/2017 Mn-54 < 12.3 < 100 0.00 - 100 Pass ERW-1120 3/20/2017 Pu-238 117 +/- 4 128 94.7 - 159 Pass ERW-1120 3/20/2017 Pu-239/240 74.8 +/- 3.3 85.8 66.6 - 108 Pass ERW-1120 3/20/2017 U-233/234 75.3 +/- 3.2 90.3 67.8 - 116 Pass ERW-1120 3/20/2017 U-238 76.4 +/- 3.2 89.5 68.2 - 110 Pass ERW-1120 3/20/2017 Zn-65 2,130 +/- 378 1,960 1630 - 2,470 Pass ERW-1120 j 3/20/2017 Fe-55 1,400 +/- 403 984 587 - 1,340 Fail ERW-1120 k 3/20/2017 Fe-55 1,081 +/- 383 984 587 - 1,340 Pass ERW-1120 3/20/2017 Sr-90 652 +/- 12 714 465 - 944 Pass a

Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory codes as follows: ERW (water), ERAP (air filter), ERSO (soil), ERVE (vegetation). Results are reported in units of pCi/L, except for air filters (pCi/Filter), vegetation and soil (pCi/kg).

c Results are presented as the known values, expected laboratory precision (2 sigma, 1 determination) and control limits as provided by ERA.

d Fe-55 analysis result was outside the acceptable range. Recounting the sample disk for 1000 minutes resulted in 254 +/- 364 with an LLD calculation of < 342. Insufficient sample was available after performing other required analyses on the sample to quantify the activity with an uncertainty less than the activity.

e ERA appears to have applied the standard material to the filter in a pattern closer to the center of the filter compared to previous studies and different from the filter efficiency utilized by the laboratory. This likely caused the efficency used the calculation to be understated and the result obtained by the laboratory to be overstated. For comparison the in-house spike for gross beta in AP (table A-3 SPAP-740 2/28/17) was acceptable with a ratio of 0.94 of lab result to known.

f Analysis result for Plutonium-239/240 was below the lower limit of acceptance.

g Samples were reanalyzed in duplicate with acceptable results for each. Original analysis had poor resolution possibly due to a poor elctroplating and is suspected in contributing to poor results.

h Analysis result for U-233/234 was below the lower limit of acceptance.

I The reanalysis result for U-233/234 was within the acceptance limits and U-238 reanalysis result was closer to the known value.

Original analysis had poor resolution possibly due to a poor electroplating and is suspected in contributing to poor results.

j Fe-55 analysis result was outside acceptable range.

k Result of recounting was acceptable. No reason for intial failure determined.

A7-2

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 = 2s counting uncertainty (corresponding to the 95% confidence level).

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

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

3.1 Individual results: For two analysis results; x1 +/- s1 and x2 +/- s2 s1 s2 2 2 Reported result: x +/- s; where x = (1/2) (x1 + x2) and s = (1/2) 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 . . . xn are defined as follows:

1 (x- x )2 x =n x s= n-1 4.2 Values below the highest lower limit of detection are not included in the average.

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

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

4.5 In rounding off, the following rules are followed:

4.5.1. If the number following those to be retained is less than 5, the number is dropped, and the retained 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

APPENDIX C Table C-1. Maximum permissible concentrations of radioactivity in air and water above natural a

background in unrestricted areas .

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

-3 Gross alpha 1 x 10 Strontium-89 8,000 Gross beta 1 Strontium-90 500 b -1 Iodine-131 2.8 x 10 Cesium-137 1,000 Barium-140 8,000 Iodine-131 1,000 c

Potassium-40 4,000 Gross alpha 2 Gross beta 10 6

Tritium 1 x 10 a

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

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 Sampling Location Maps D-1

i I

I I

I I

I I

ti

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b Figure D-1, Sample Collection and Analysis Program: TLD locations, Inner Ring (Table 5.2)

D-2

Figure D-2, Sample Collection and Analysis Program: TLD locations, Outer Ring. (Table 5.2)

D-3

Figure D-3, Sample Collection and Analysis Program: TLD locations, Controls. (Table 5.2)

D-4

Figure D-4, Sample Collection and Analysis Program: Radiological Environmental Monitoring Program,

- Highest D/Q Garden c::::J Surface Water Sample C) Well Water Sample T l22N R2SW

/'>- - Air Sample

. *!.!1~s - Sediment Sample Tl2 1N

/ _ _ R25W D-5 i _

Well Water and Shoreline sampling locations. (Table 5.2)

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• fax (847) 564-45 17 XCEL ENERGY CORPORATION MONTICELLO NUCLEAR GENERATING PLANT DOCKET No. 50-263 LICENSE No. DPR-22 ANNUAL REPORT TO THE UNITED STATES NUCLEAR REGULATORY COMMISSION PARTII Radiological Environmental Monitoring Program Complete Analyses Data Tables January - December, 2017 Prepared under contract by ENVIRONMENTAL, INC MIDWEST LABORATORY PROJECT No. 8010 Rev iewed and Approved Forrest G. Shaw Ill Quality Assurance Manager

MNGP TABLE OF CONTENTS Section Page List of Tables ................................................................................................................... iii 10 INTRODUCTION............................................................................................................. iv 20 LISTING OF MISSED SAMPLES ................................................................................... v 30 DATA TABLES ................................................................................................................ vi ii

MNGP LIST OF TABLES No Title Page 1 Ambient radiation as measured by thermoluminescent dosimeters (TLDs) .................................. 1-1 2 Airborne particulates and iodine collected at Location M-1(C), analysis for gross beta and iodine-131 ............................................................................................................... 2-1 3 Airborne particulates and iodine collected at Location M-2, analysis for gross beta and iodine-131 ...................................................................................................................... 3-1 4 Airborne particulates and iodine collected at Location M-3, analysis for gross beta and iodine-131 ...................................................................................................................... 4-1 5 Airborne particulates and iodine collected at Location M-4, analysis for gross beta and iodine-131 ...................................................................................................................... 5-1 6 Airborne particulates and iodine collected at Location M-5, analysis for gross beta and iodine-131 ...................................................................................................................... 6-1 7 Airborne particulates, analysis for gross beta, monthly averages ................................................. 7-1 8 Airborne particulate samples, quarterly composites from each location, analysis for gamma-emitting isotopes .............................................................................................. 8-1 9 Pasture Grass, vegetation, analysis for iodine-131 and gamma emitting isotopes ....................... 9-1 10 River water, upstream, M-8 (C) and M-9, analysis of monthly composites for gamma-emitting isotopes ............................................................................................................ 10-1 11 Drinking water, City of Minneapolis, M-14, analysis of monthly composites for gross beta, iodine-131 and gamma-emitting isotopes.............................................................. 11-1 12 River water and drinking water, analysis of quarterly composites for tritium ................................ 12-1 13 Well water, analysis for tritium and gamma-emitting isotopes ...................................................... 13-1 14 Fish, analysis of edible portions for gamma-emitting isotopes ..................................................... 14-1 15 Aquatic Invertebrates, analysis for gamma-emitting isotopes ....................................................... 15-1 16 Shoreline sediments, analysis for gamma-emitting isotopes ........................................................ 16-1 iii

MNGP 10 INTRODUCTION The following constitutes the final 2017 report for the Environmental Radiological Monitoring Program conducted at the Monticello Nuclear Generating Plant in Monticello, Minnesota Results of completed analyses are presented in the attached tables All concentrations, except gross beta, are decay corrected to the time of collection All samples were collected within the scheduled period unless noted otherwise in the Listing of Missed Samples iv

MNGP 2.0 LISTING OF MISSED SAMPLES All required samples were collected and analyzed as scheduled with the following exceptions:

Collection Reason for not Sample Analysis Location Date or Plans for Preventing conducting REMP Type Period Recurrence as required Water frozen entire month; SW Gamma M-8c January 17 None No composite.

2/1/17, Water frozen. Only one sample in SW Gamma M-8c 2/8/17, None 2/15/17 composite.

Partial sample due to GFCI failure AP/AI Beta, I-131 M-1 3/8/17 Replaced GFCI.

during thunderstorm.

AP/AI Beta, I-131 M-1 3/15/17 Sample not sent; pump found Replaced pump.

off; only 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> of run time.

Water frozen. Not included in SW Gamma M-8c 3/15/17 None composite.

TLD Gamma M-2C 1st Qtr 2017 TLD missing in field. None Partial sample due to an apparent loss of AP/AI Beta, I-131 M-03 6/14/17 None power during a thunderstorm.

BO Gamma M-8c 1st half 2017 No upstream bottom organisms found. None TLD Gamma M-15B 3rd Qtr 2017 TLD missing in field. None BO Gamma M-8c 2nd half 2017 No upstream bottom organisms found. None Water Frozen entire month, SW Gamma M-8c December 17 None No Composite.

v

MNGP 30 DATA TABLES vi

MNGP Table 1. Ambient gamma radiation as measured by thermoluminescent dosimeters (TLD's).

Previous mRem/91 days Cumulative Annual Location 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average Indicators (Inner Ring, General Area of Site Boundary)

M-01A 17.5 +/- 1.7 16.0 +/- 1.5 16.9 +/- 1.7 16.0 +/- 1.5 16.6 15.8 M-02A 16.3 +/- 2.1 15.8 +/- 0.7 16.5 +/- 1.2 16.4 +/- 0.8 16.2 14.7 M-03A 15.9 +/- 1.3 15.8 +/- 0.7 15.1 +/- 1.2 16.1 +/- 1.0 15.7 13.4 M-04A 14.1 +/- 1.4 15.7 +/- 1.0 14.0 +/- 1.1 16.4 +/- 1.2 15.1 14.3 M-05A 17.1 +/- 0.9 14.3 +/- 1.0 16.2 +/- 0.9 14.7 +/- 0.7 15.6 14.4 M-06A 17.5 +/- 1.0 17.1 +/- 0.9 16.4 +/- 0.8 14.5 +/- 0.8 16.4 17.2 M-07A 15.3 +/- 1.1 16.2 +/- 0.8 14.5 +/- 1.0 16.9 +/- 0.8 15.7 14.2 M-08A 16.3 +/- 1.0 16.1 +/- 0.6 16.2 +/- 0.7 16.1 +/- 0.6 16.2 15.3 M-09A 16.1 +/- 1.1 14.9 +/- 0.9 15.4 +/- 1.0 15.7 +/- 1.2 15.5 14.6 M-10A 15.8 +/- 1.3 15.4 +/- 0.9 15.0 +/- 0.9 16.3 +/- 0.9 15.6 14.5 M-11A 17.5 +/- 0.9 17.1 +/- 0.6 17.6 +/- 0.6 17.2 +/- 0.8 17.3 16.2 M-12A 17.6 +/- 1.2 16.7 +/- 1.1 17.1 +/- 1.1 17.0 +/- 0.9 17.1 15.9 M-13A 16.5 +/- 1.1 15.4 +/- 1.0 15.5 +/- 1.0 15.4 +/- 0.8 15.7 15.0 M-14A 16.0 +/- 1.1 16.1 +/- 0.6 15.8 +/- 0.8 16.2 +/- 0.7 16.0 15.4 Mean +/- s.d. 16.4 +/- 1.0 15.9 +/- 0.8 15.9 +/- 1.0 16.0 +/- 0.8 16.1 15.1 Indicators (Outer Ring, 4-5 Miles Distant)

M-01B 14.9 +/- 1.3 15.6 +/- 1.5 14.9 +/- 0.9 15.1 +/- 1.0 15.1 14.7 M-02B 15.4 +/- 1.0 15.1 +/- 0.7 15.4 +/- 0.8 14.4 +/- 0.7 15.1 14.8 M-03B 11.7 +/- 1.0 12.0 +/- 0.7 12.4 +/- 0.8 13.1 +/- 0.7 12.3 11.7 M-04B 14.5 +/- 0.9 13.9 +/- 0.8 14.9 +/- 1.1 14.5 +/- 0.9 14.5 14.0 M-05B 14.7 +/- 1.1 15.2 +/- 0.8 14.7 +/- 0.7 15.7 +/- 0.9 15.1 13.6 M-06B 12.7 +/- 1.1 15.8 +/- 0.6 14.3 +/- 1.0 16.0 +/- 0.8 14.7 13.9 M-07B 16.2 +/- 1.1 15.1 +/- 1.1 16.3 +/- 1.1 15.9 +/- 1.2 15.9 14.8 M-08B 14.6 +/- 1.1 14.1 +/- 0.9 15.2 +/- 0.9 14.7 +/- 1.0 14.7 13.9 M-09B 14.8 +/- 1.2 16.6 +/- 0.8 15.8 +/- 0.9 15.7 +/- 0.8 15.7 14.7 M-10B 15.4 +/- 1.2 15.2 +/- 1.0 16.3 +/- 0.8 15.8 +/- 0.9 15.7 15.3 M-11B 15.4 +/- 1.5 16.2 +/- 1.2 17.0 +/- 1.1 17.1 +/- 0.9 16.4 14.7 M-12B 13.5 +/- 1.4 16.0 +/- 1.1 14.8 +/- 1.1 16.6 +/- 0.7 15.2 14.4 M-13B 15.5 +/- 1.2 14.5 +/- 0.7 15.8 +/- 1.1 15.1 +/- 0.8 15.2 14.0 M-14B 15.8 +/- 1.8 17.2 +/- 0.6 17.3 +/- 1.7 17.6 +/- 0.8 17.0 16.2 M-15B 14.5 +/- 0.9 15.4 +/- 0.8 NDa 15.2 +/- 1.0 15.1 14.6 M-16B 13.6 +/- 0.8 14.3 +/- 1.2 16.1 +/- 1.8 15.0 +/- 1.1 14.7 14.2 Mean +/- s.d. 14.6 +/- 1.2 15.1 +/- 1.2 15.4 +/- 1.2 15.5 +/- 1.1 15.1 14.3 a

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

1-1

MNGP Table 1. Ambient gamma radiation as measured by thermoluminescent dosimeters (TLD's),

(continued).

Previous mRem/91 days Cumulative Annual Location 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average Control M-01C 13.0 +/- 1.8 14.0 +/- 0.9 14.1 +/- 1.3 14.0 +/- 0.9 13.8 14.0 M-02C NDa 15.9 +/- 1.0 13.5 +/- 0.8 13.7 +/- 0.7 14.4 17.5 M-03C 14.8 +/- 0.9 15.4 +/- 0.8 15.5 +/- 0.7 15.9 +/- 0.8 15.4 15.4 M-04C 14.8 +/- 1.0 14.0 +/- 0.6 16.7 +/- 1.0 14.8 +/- 0.8 15.1 14.9 Mean +/- s.d. 14.2 +/- 1.0 14.8 +/- 0.9 14.9 +/- 1.4 14.6 +/- 1.0 14.7 15.4 Indicators (Special Interest Areas)

M-01S 13.3 +/- 1.9 12.0 +/- 0.6 12.3 +/- 1.3 12.6 +/- 0.7 12.6 11.2 M-02S 14.7 +/- 1.5 13.9 +/- 0.8 14.4 +/- 1.1 14.5 +/- 0.9 14.4 13.9 M-03S 13.6 +/- 1.3 14.9 +/- 1.0 15.4 +/- 1.1 15.5 +/- 1.1 14.8 14.3 M-04S 16.3 +/- 1.6 15.6 +/- 1.1 17.0 +/- 0.9 16.5 +/- 1.0 16.3 16.2 M-05S 14.1 +/- 1.4 14.5 +/- 1.1 15.1 +/- 0.9 16.1 +/- 1.0 15.0 15.7 M-06S 15.2 +/- 1.1 15.2 +/- 0.8 16.1 +/- 0.5 16.2 +/- 0.9 15.7 16.1 M-I-11 17.3 +/- 2.2 15.3 +/- 1.1 17.8 +/- 1.5 15.6 +/- 1.0 16.5 16.5 M-I-12 15.4 +/- 0.9 13.9 +/- 0.9 15.9 +/- 0.8 14.6 +/- 1.0 15.0 14.8 M-I-13 13.8 +/- 1.2 14.7 +/- 1.2 16.6 +/- 1.1 15.5 +/- 1.2 15.2 17.4 Mean +/- s.d. 14.9 +/- 1.3 14.4 +/- 1.3 15.6 +/- 1.6 15.2 +/- 1.5 15.0 15.1 ISFSI Fence (Non-REMP TLDs)

M-I-01 39.7 +/- 1.3 32.8 +/- 1.8 43.3 +/- 1.8 39.1 +/- 2.1 38.7 39.8 M-I-02 36.2 +/- 1.7 27.5 +/- 0.7 38.7 +/- 0.5 32.9 +/- 0.6 33.8 35.3 M-I-03 33.1 +/- 2.0 25.4 +/- 1.3 34.0 +/- 1.3 29.8 +/- 1.4 30.6 30.9 M-I-04 39.7 +/- 3.1 31.4 +/- 2.1 39.2 +/- 1.2 34.9 +/- 2.1 36.3 35.4 M-I-05 68.7 +/- 4.1 58.2 +/- 3.8 49.2 +/- 2.5 50.6 +/- 2.4 56.7 67.7 M-I-06 27.6 +/- 2.5 23.9 +/- 1.0 29.2 +/- 1.9 25.0 +/- 0.8 26.4 27.6 M-I-07 30.9 +/- 1.9 26.8 +/- 1.1 30.6 +/- 1.1 28.5 +/- 1.7 29.2 31.3 M-I-08 27.8 +/- 2.0 26.3 +/- 1.5 28.9 +/- 1.9 27.3 +/- 1.8 27.6 29.1 M-I-09 46.5 +/- 2.3 39.9 +/- 2.4 48.0 +/- 2.5 43.5 +/- 2.3 44.5 56.5 M-I-10 36.7 +/- 1.3 28.7 +/- 1.1 36.6 +/- 1.3 31.3 +/- 1.2 33.3 36.8 Mean +/- s.d. 38.7 +/- 12.1 32.1 +/- 10.3 37.8 +/- 7.4 34.3 +/- 8.0 35.7 33.8 a

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

1-2

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

Location: M-1 (C)

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

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 Required LLD 0.010 01-04-17 327 0.029 +/- 0.004 07-05-17 349 0.022 +/- 0.003 01-11-17 324 0.045 +/- 0.004 07-12-17 328 0.022 +/- 0.003 01-18-17 352 0.044 +/- 0.004 07-19-17 327 0.019 +/- 0.003 01-25-17 323 0.035 +/- 0.004 07-26-17 329 0.023 +/- 0.003 02-01-17 355 0.022 +/- 0.003 08-02-17 353 0.025 +/- 0.003 02-08-17 322 0.033 +/- 0.004 08-09-17 326 0.020 +/- 0.003 02-15-17 354 0.028 +/- 0.003 08-16-17 354 0.022 +/- 0.003 02-22-17 324 0.031 +/- 0.004 08-23-17 353 0.023 +/- 0.003 03-01-17 323 0.030 +/- 0.004 08-30-17 337 0.017 +/- 0.003 03-08-17 226b 0.036 +/- 0.005 b

09-06-17 324 0.027 +/- 0.004 03-15-17 NDc 09-13-17 329 0.041 +/- 0.004 03-22-17 298 0.029 +/- 0.004 09-20-17 326 0.043 +/- 0.004 03-29-17 327 0.025 +/- 0.003 09-27-17 296 0.023 +/- 0.003 1st Quarter Mean +/- s.d. 0.032 +/- 0.007 3rd Quarter Mean +/- s.d. 0.025 +/- 0.008 04-05-17 328 0.024 +/- 0.003 10-04-17 329 0.024 +/- 0.003 04-12-17 323 0.022 +/- 0.003 10-11-17 297 0.022 +/- 0.003 04-19-17 325 0.020 +/- 0.003 10-18-17 297 0.028 +/- 0.004 04-26-17 331 0.015 +/- 0.003 10-25-17 263 0.028 +/- 0.004 05-03-17 321 0.022 +/- 0.003 11-01-17 330 0.012 +/- 0.003 05-10-17 331 0.026 +/- 0.003 11-08-17 360 0.024 +/- 0.003 05-17-17 325 0.021 +/- 0.003 11-15-17 333 0.059 +/- 0.005 05-24-17 328 0.011 +/- 0.003 11-22-17 335 0.044 +/- 0.004 05-31-17 353 0.011 +/- 0.002 11-29-17 333 0.038 +/- 0.004 06-07-17 324 0.027 +/- 0.004 12-06-17 335 0.042 +/- 0.004 06-14-17 331 0.028 +/- 0.003 12-13-17 320 0.034 +/- 0.004 06-21-17 323 0.019 +/- 0.003 12-20-17 335 0.031 +/- 0.004 06-28-17 328 0.016 +/- 0.003 12-27-17 364 0.030 +/- 0.003 01-03-18 332 0.073 +/- 0.005 2nd Quarter Mean +/- s.d. 0.020 +/- 0.006 4th Quarter Mean +/- s.d. 0.035 +/- 0.016 Cumulative Average 0.028 Previous Annual Average 0.024 a

Iodine-131 concentrations are < 0.03 pCi/m 3 unless otherwise noted.

b Partial sample volume due to loss of power during sample period.

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

2-1

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

Location: M-2 Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 0.010 01-04-17 356 0.027 +/- 0.003 07-05-17 327 0.023 +/- 0.003 01-11-17 326 0.046 +/- 0.004 07-12-17 321 0.026 +/- 0.003 01-18-17 348 0.044 +/- 0.004 07-19-17 324 0.022 +/- 0.003 01-25-17 327 0.038 +/- 0.004 07-26-17 326 0.021 +/- 0.003 02-01-17 351 0.022 +/- 0.003 08-02-17 381 0.020 +/- 0.003 02-08-17 351 0.031 +/- 0.003 08-09-17 385 0.019 +/- 0.003 02-15-17 327 0.029 +/- 0.004 08-16-17 412 0.023 +/- 0.003 02-22-17 329 0.026 +/- 0.003 08-23-17 416 0.023 +/- 0.003 03-01-17 298 0.031 +/- 0.004 08-30-17 401 0.019 +/- 0.003 03-08-17 341 0.023 +/- 0.003 09-06-17 416 0.025 +/- 0.003 03-15-17 321 0.028 +/- 0.004 09-13-17 383 0.042 +/- 0.004 03-22-17 339 0.027 +/- 0.003 09-20-17 388 0.044 +/- 0.004 03-29-17 353 0.022 +/- 0.003 09-27-17 380 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.030 +/- 0.008 3rd Quarter Mean +/- s.d. 0.025 +/- 0.008 04-05-17 328 0.021 +/- 0.003 10-04-17 388 0.025 +/- 0.003 04-12-17 351 0.018 +/- 0.003 10-11-17 383 0.024 +/- 0.003 04-19-17 352 0.021 +/- 0.003 10-18-17 384 0.025 +/- 0.003 04-26-17 374 0.012 +/- 0.002 10-25-17 351 0.024 +/- 0.003 05-03-17 352 0.024 +/- 0.003 11-01-17 383 0.014 +/- 0.003 05-10-17 408 0.019 +/- 0.003 11-08-17 344 0.047 +/- 0.004 05-17-17 382 0.021 +/- 0.003 11-15-17 341 0.055 +/- 0.005 05-24-17 381 0.010 +/- 0.002 11-22-17 344 0.040 +/- 0.004 05-31-17 377 0.010 +/- 0.002 11-29-17 316 0.035 +/- 0.004 06-07-17 381 0.025 +/- 0.003 12-06-17 315 0.037 +/- 0.004 06-14-17 324 0.025 +/- 0.003 12-13-17 284 0.034 +/- 0.004 06-21-17 321 0.025 +/- 0.003 12-20-17 286 0.038 +/- 0.004 06-28-17 321 0.013 +/- 0.003 12-27-17 317 0.035 +/- 0.004 01-03-18 313 0.057 +/- 0.005 2nd Quarter Mean +/- s.d. 0.019 +/- 0.006 4th Quarter Mean +/- s.d. 0.035 +/- 0.012 Cumulative Average 0.027 Previous Annual Average 0.025 a

Iodine-131 concentrations are < 0.03 pCi/m 3 unless otherwise noted.

3-1

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

Location: M-3 Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 0.010 01-04-17 328 0.036 +/- 0.004 07-05-17 302 0.023 +/- 0.003 01-11-17 326 0.049 +/- 0.005 07-12-17 323 0.023 +/- 0.003 01-18-17 347 0.051 +/- 0.004 07-19-17 326 0.021 +/- 0.003 01-25-17 328 0.047 +/- 0.004 07-26-17 328 0.021 +/- 0.003 02-01-17 353 0.023 +/- 0.003 08-02-17 351 0.023 +/- 0.003 02-08-17 351 0.030 +/- 0.003 08-09-17 340 0.024 +/- 0.003 02-15-17 326 0.033 +/- 0.004 08-16-17 379 0.023 +/- 0.003 02-22-17 329 0.035 +/- 0.004 08-23-17 416 0.022 +/- 0.003 03-01-17 325 0.030 +/- 0.004 08-30-17 386 0.015 +/- 0.002 03-08-17 341 0.032 +/- 0.004 09-06-17 384 0.026 +/- 0.003 03-15-17 347 0.031 +/- 0.004 09-13-17 383 0.039 +/- 0.004 03-22-17 353 0.030 +/- 0.004 09-20-17 357 0.044 +/- 0.004 03-29-17 353 0.025 +/- 0.003 09-27-17 349 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.035 +/- 0.009 3rd Quarter Mean +/- s.d. 0.025 +/- 0.008 04-05-17 323 0.027 +/- 0.003 10-04-17 355 0.024 +/- 0.003 04-12-17 352 0.021 +/- 0.003 10-11-17 352 0.029 +/- 0.003 04-19-17 350 0.017 +/- 0.003 10-18-17 352 0.021 +/- 0.003 04-26-17 324 0.014 +/- 0.003 10-25-17 319 0.024 +/- 0.003 05-03-17 325 0.020 +/- 0.003 11-01-17 350 0.011 +/- 0.002 05-10-17 326 0.027 +/- 0.003 11-08-17 344 0.026 +/- 0.003 05-17-17 328 0.021 +/- 0.003 11-15-17 341 0.056 +/- 0.005 05-24-17 299 0.012 +/- 0.003 11-22-17 344 0.045 +/- 0.004 05-31-17 323 0.011 +/- 0.003 11-29-17 346 0.033 +/- 0.004 06-07-17 328 0.023 +/- 0.003 12-06-17 344 0.043 +/- 0.004 06-14-17 NDb 12-13-17 313 0.032 +/- 0.004 06-21-17 323 0.016 +/- 0.003 12-20-17 314 0.036 +/- 0.004 06-28-17 323 0.016 +/- 0.003 12-27-17 317 0.033 +/- 0.004 01-03-18 313 0.059 +/- 0.005 2nd Quarter Mean +/- s.d. 0.019 +/- 0.005 4th Quarter Mean +/- s.d. 0.034 +/- 0.013 Cumulative Average 0.028 Previous Annual Average 0.027 a

Iodine-131 concentrations are < 0.03 pCi/m 3 unless otherwise noted.

b Low volume due to power outage from storms. 144 m 3 volume/ result 0.061 +/- 0.008 pCi/m3.

Not included in cumulative or monthly averages or Part I table 5.4. mean and range data.

See Table 2.0, Listing of Missed Samples.

4-1

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

Location: M-4 Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 0.010 01-04-17 357 0.029 +/- 0.003 07-05-17 354 0.020 +/- 0.003 01-11-17 339 0.042 +/- 0.004 07-12-17 325 0.022 +/- 0.003 01-18-17 351 0.043 +/- 0.004 07-19-17 327 0.018 +/- 0.003 01-25-17 352 0.039 +/- 0.004 07-26-17 329 0.022 +/- 0.003 02-01-17 379 0.021 +/- 0.003 08-02-17 375 0.024 +/- 0.003 02-08-17 351 0.027 +/- 0.003 08-09-17 353 0.023 +/- 0.003 02-15-17 327 0.029 +/- 0.004 08-16-17 349 0.025 +/- 0.003 02-22-17 329 0.027 +/- 0.003 08-23-17 377 0.020 +/- 0.003 03-01-17 325 0.026 +/- 0.004 08-30-17 353 0.022 +/- 0.003 03-08-17 342 0.032 +/- 0.004 09-06-17 352 0.027 +/- 0.003 03-15-17 347 0.028 +/- 0.003 09-13-17 352 0.044 +/- 0.004 03-22-17 339 0.026 +/- 0.003 09-20-17 355 0.044 +/- 0.004 03-29-17 354 0.025 +/- 0.003 09-27-17 349 0.020 +/- 0.003 1st Quarter Mean +/- s.d. 0.030 +/- 0.007 3rd Quarter Mean +/- s.d. 0.025 +/- 0.009 04-05-17 356 0.023 +/- 0.003 10-04-17 355 0.026 +/- 0.003 04-12-17 350 0.020 +/- 0.003 10-11-17 351 0.024 +/- 0.003 04-19-17 351 0.019 +/- 0.003 10-18-17 327 0.027 +/- 0.004 04-26-17 351 0.013 +/- 0.003 10-25-17 351 0.023 +/- 0.003 05-03-17 351 0.020 +/- 0.003 11-01-17 302 0.015 +/- 0.003 05-10-17 353 0.018 +/- 0.003 11-08-17 353 0.027 +/- 0.003 05-17-17 328 0.021 +/- 0.003 11-15-17 350 0.052 +/- 0.004 05-24-17 353 0.011 +/- 0.003 11-22-17 353 0.038 +/- 0.004 05-31-17 375 0.010 +/- 0.002 11-29-17 353 0.034 +/- 0.004 06-07-17 327 0.026 +/- 0.003 12-06-17 353 0.039 +/- 0.004 06-14-17 356 0.024 +/- 0.003 12-13-17 350 0.027 +/- 0.003 06-21-17 348 0.020 +/- 0.003 12-20-17 352 0.033 +/- 0.004 06-28-17 351 0.014 +/- 0.003 12-27-17 355 0.028 +/- 0.003 01-03-18 350 0.056 +/- 0.004 2nd Quarter Mean +/- s.d. 0.018 +/- 0.005 4th Quarter Mean +/- s.d. 0.032 +/- 0.011 Cumulative Average 0.027 Previous Annual Average 0.026 a

Iodine-131 concentrations are < 0.03 pCi/m 3 unless otherwise noted.

5-1

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

Location: M-5 Units: pCi/m3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 0.010 01-04-17 328 0.033 +/- 0.004 07-05-17 296 0.021 +/- 0.003 01-11-17 323 0.046 +/- 0.004 07-12-17 322 0.023 +/- 0.003 01-18-17 353 0.051 +/- 0.004 07-19-17 324 0.017 +/- 0.003 01-25-17 322 0.038 +/- 0.004 07-26-17 326 0.018 +/- 0.003 02-01-17 353 0.022 +/- 0.003 08-02-17 350 0.024 +/- 0.003 02-08-17 322 0.035 +/- 0.004 08-09-17 353 0.021 +/- 0.003 02-15-17 325 0.031 +/- 0.004 08-16-17 392 0.024 +/- 0.003 02-22-17 326 0.028 +/- 0.004 08-23-17 384 0.019 +/- 0.003 03-01-17 294 0.031 +/- 0.004 08-30-17 384 0.019 +/- 0.003 03-08-17 296 0.034 +/- 0.004 09-06-17 384 0.028 +/- 0.003 03-15-17 319 0.030 +/- 0.004 09-13-17 385 0.042 +/- 0.004 03-22-17 323 0.032 +/- 0.004 09-20-17 355 0.043 +/- 0.004 03-29-17 325 0.024 +/- 0.003 09-27-17 349 0.019 +/- 0.003 1st Quarter Mean +/- s.d. 0.033 +/- 0.008 3rd Quarter Mean +/- s.d. 0.024 +/- 0.008 04-05-17 326 0.022 +/- 0.003 10-04-17 355 0.023 +/- 0.003 04-12-17 322 0.021 +/- 0.003 10-11-17 351 0.025 +/- 0.003 04-19-17 351 0.016 +/- 0.003 10-18-17 352 0.025 +/- 0.003 04-26-17 324 0.015 +/- 0.003 10-25-17 319 0.025 +/- 0.003 05-03-17 322 0.021 +/- 0.003 11-01-17 353 0.011 +/- 0.003 05-10-17 325 0.023 +/- 0.003 11-08-17 343 0.025 +/- 0.003 05-17-17 294 0.022 +/- 0.003 11-15-17 342 0.058 +/- 0.005 05-24-17 295 0.012 +/- 0.003 11-22-17 344 0.044 +/- 0.004 05-31-17 322 0.011 +/- 0.003 11-29-17 343 0.036 +/- 0.004 06-07-17 294 0.027 +/- 0.004 12-06-17 344 0.041 +/- 0.004 06-14-17 297 0.025 +/- 0.004 12-13-17 312 0.034 +/- 0.004 06-21-17 320 0.019 +/- 0.003 12-20-17 343 0.034 +/- 0.004 06-28-17 323 0.016 +/- 0.003 12-27-17 317 0.036 +/- 0.004 01-03-18 313 0.062 +/- 0.005 2nd Quarter Mean +/- s.d. 0.019 +/- 0.005 4th Quarter Mean +/- s.d. 0.034 +/- 0.014 Cumulative Average 0.028 Previous Annual Average 0.026 a

Iodine-131 concentrations are < 0.03 pCi/m 3 unless otherwise noted.

6-1

MNGP Table 7. Airborne particulate data, gross beta analyses, monthly averages, minima and maxima.

January April Location Average Minima Maxima Location Average Minima Maxima M-1(Control) 0.035 0.022 0.045 M-1(Control) 0.021 0.015 0.024 Indicators 0.037 0.021 0.051 Indicators 0.019 0.012 0.027 M-2 0.035 0.022 0.046 M-2 0.019 0.012 0.024 M-3 0.041 0.023 0.051 M-3 0.020 0.014 0.027 M-4 0.035 0.021 0.043 M-4 0.019 0.013 0.023 M-5 0.038 0.022 0.051 M-5 0.019 0.015 0.022 February May Location Average Minima Maxima Location Average Minima Maxima M-1(Control) 0.031 0.028 0.033 M-1(Control) 0.017 0.011 0.026 Indicators 0.030 0.026 0.035 Indicators 0.016 0.010 0.027 M-2 0.029 0.026 0.031 M-2 0.015 0.010 0.021 M-3 0.032 0.030 0.035 M-3 0.018 0.011 0.027 M-4 0.027 0.026 0.029 M-4 0.015 0.010 0.021 M-5 0.031 0.028 0.035 M-5 0.017 0.011 0.023 March June Location Average Minima Maxima Location Average Minima Maxima M-1(Control) 0.030 0.025 0.036 M-1(Control) 0.023 0.016 0.028 Indicators 0.028 0.022 0.034 Indicators 0.021 0.013 0.027 M-2 0.025 0.022 0.028 M-2 0.022 0.013 0.025 M-3 0.030 0.025 0.032 M-3 0.018 0.016 0.023 M-4 0.028 0.025 0.032 M-4 0.021 0.014 0.026 M-5 0.030 0.024 0.034 M-5 0.022 0.016 0.027 Note: unless otherwise specified, samples collected on the first, second or third day of the month are grouped with data of the previous month.

7-1

MNGP Table 7. Airborne particulate data, gross beta analyses, monthly averages, minima and maxima.

July October Location Average Minima Maxima Location Average Minima Maxima M-1(Control) 0.022 0.019 0.025 M-1(Control) 0.023 0.012 0.028 Indicators 0.022 0.017 0.026 Indicators 0.022 0.011 0.029 M-2 0.022 0.020 0.026 M-2 0.022 0.014 0.025 M-3 0.022 0.021 0.023 M-3 0.022 0.011 0.029 M-4 0.021 0.018 0.024 M-4 0.023 0.015 0.027 M-5 0.021 0.017 0.024 M-5 0.022 0.011 0.025 August November Location Average Minima Maxima Location Average Minima Maxima M-1(Control) 0.021 0.017 0.023 M-1(Control) 0.041 0.024 0.059 Indicators 0.021 0.015 0.025 Indicators 0.041 0.025 0.058 M-2 0.021 0.019 0.023 M-2 0.044 0.035 0.055 M-3 0.021 0.015 0.024 M-3 0.040 0.026 0.056 M-4 0.023 0.020 0.025 M-4 0.038 0.027 0.052 M-5 0.021 0.019 0.024 M-5 0.041 0.025 0.058 September December Location Average Minima Maxima Location Average Minima Maxima M-1(Control) 0.034 0.023 0.043 M-1(Control) 0.042 0.030 0.073 Indicators 0.033 0.019 0.044 Indicators 0.040 0.027 0.062 M-2 0.033 0.021 0.044 M-2 0.040 0.034 0.057 M-3 0.033 0.021 0.044 M-3 0.041 0.032 0.059 M-4 0.034 0.020 0.044 M-4 0.037 0.027 0.056 M-5 0.033 0.019 0.043 M-5 0.041 0.034 0.062 Note: unless otherwise specified, samples collected on the first, second or third day of the month are grouped with data of the previous month.

7-2

MNGP Table 8. Airborne particulates, quarterly composites from each location, analysis for gamma-emitting isotopes.

Activity (pCi/m3)

Cumulative Previous 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average M-1 (C)

Lab Code MAP- 1688 MAP- 3680 MAP- 5583 MAP- 6842 3

Volume(m ) 3853 4272 4329 4561 Be-7 0.078 +/- 0.013 0.107 +/- 0.017 0.076 +/- 0.011 0.058 +/- 0.012 0.080 0.069 Mn-54 < 0.0005 < 0.0007 < 0.0004 < 0.0006 <0.0007 <0.0010 Co-58 < 0.0007 < 0.0007 < 0.0006 < 0.0009 <0.0007 <0.0008 Co-60 < 0.0008 < 0.0003 < 0.0003 < 0.0009 <0.0008 <0.0008 Zn-65 < 0.0016 < 0.0007 < 0.0006 < 0.0025 <0.0016 <0.0017 Zr-Nb-95 < 0.0009 < 0.0010 < 0.0006 < 0.0010 <0.0010 <0.0012 Ru-103 < 0.0008 < 0.0011 < 0.0010 < 0.0011 <0.0011 <0.0010 Ru-106 < 0.0033 < 0.0063 < 0.0058 < 0.0067 <0.0063 <0.0080 Cs-134 < 0.0009 < 0.0008 < 0.0007 < 0.0010 <0.0009 <0.0008 Cs-137 < 0.0009 < 0.0008 < 0.0006 < 0.0006 <0.0009 <0.0008 Ba-La-140 < 0.0017 < 0.0023 < 0.0015 < 0.0015 <0.0023 <0.0042 Ce-141 < 0.0019 < 0.0012 < 0.0012 < 0.0017 <0.0019 <0.0022 Ce-144 < 0.0051 < 0.0026 < 0.0032 < 0.0045 <0.0051 <0.0044 M-2 Lab Code MAP- 1689 MAP- 3681 MAP- 5584 MAP- 6843 3

Volume(m ) 4367 4651 4860 4747 Be-7 0.067 +/- 0.012 0.094 +/- 0.014 0.085 +/- 0.014 0.052 +/- 0.011 0.074 0.073 Mn-54 < 0.0008 < 0.0006 < 0.0007 < 0.0005 <0.0008 <0.0010 Co-58 < 0.0005 < 0.0010 < 0.0004 < 0.0007 <0.0010 <0.0009 Co-60 < 0.0006 < 0.0006 < 0.0002 < 0.0006 <0.0006 <0.0009 Zn-65 < 0.0016 < 0.0006 < 0.0009 < 0.0004 <0.0016 <0.0020 Zr-Nb-95 < 0.0010 < 0.0008 < 0.0015 < 0.0006 <0.0015 <0.0013 Ru-103 < 0.0010 < 0.0008 < 0.0014 < 0.0006 <0.0014 <0.0012 Ru-106 < 0.0050 < 0.0032 < 0.0071 < 0.0051 <0.0071 <0.0081 Cs-134 < 0.0008 < 0.0007 < 0.0007 < 0.0006 <0.0008 <0.0011 Cs-137 < 0.0004 < 0.0004 < 0.0007 < 0.0004 <0.0007 <0.0009 Ba-La-140 < 0.0019 < 0.0015 < 0.0036 < 0.0010 <0.0036 <0.0046 Ce-141 < 0.0020 < 0.0012 < 0.0014 < 0.0012 <0.0020 <0.0022 Ce-144 < 0.0037 < 0.0031 < 0.0042 < 0.0028 <0.0042 <0.0047 8-1

MNGP Table 8. Airborne particulates, quarterly composites from each location, analysis for gamma-emitting isotopes.

Activity (pCi/m3)

Cumulative Previous 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average M-3 Lab Code MAP- 1690 MAP- 3682 MAP- 5585 MAP- 6844 3

Volume(m ) 4408 4068 4622 4701 Be-7 0.073 +/- 0.015 0.099 +/- 0.015 0.071 +/- 0.010 0.062 +/- 0.012 0.076 0.081 Mn-54 < 0.0008 < 0.0008 < 0.0005 < 0.0006 <0.0008 <0.0007 Co-58 < 0.0006 < 0.0008 < 0.0006 < 0.0007 <0.0008 <0.0008 Co-60 < 0.0006 < 0.0005 < 0.0005 < 0.0006 <0.0006 <0.0008 Zn-65 < 0.0023 < 0.0006 < 0.0005 < 0.0008 <0.0023 <0.0018 Zr-Nb-95 < 0.0015 < 0.0006 < 0.0009 < 0.0012 <0.0015 <0.0012 Ru-103 < 0.0014 < 0.0012 < 0.0009 < 0.0010 <0.0014 <0.0012 Ru-106 < 0.0082 < 0.0071 < 0.0026 < 0.0044 <0.0082 <0.0064 Cs-134 < 0.0009 < 0.0006 < 0.0006 < 0.0007 <0.0009 <0.0008 Cs-137 < 0.0010 < 0.0007 < 0.0006 < 0.0007 <0.0010 <0.0006 Ba-La-140 < 0.0026 < 0.0021 < 0.0021 < 0.0018 <0.0026 <0.0044 Ce-141 < 0.0023 < 0.0015 < 0.0007 < 0.0011 <0.0023 <0.0020 Ce-144 < 0.0050 < 0.0042 < 0.0021 < 0.0047 <0.0050 <0.0041 M-4 Lab Code MAP- 1691 MAP- 3683 MAP- 5586 MAP- 6845 3

Volume(m ) 4489 4549 4549 4855 Be-7 0.058 +/- 0.011 0.096 +/- 0.014 0.095 +/- 0.016 0.056 +/- 0.012 0.076 0.075 Mn-54 < 0.0006 < 0.0009 < 0.0005 < 0.0007 <0.0009 <0.0010 Co-58 < 0.0005 < 0.0007 < 0.0008 < 0.0005 <0.0008 <0.0006 Co-60 < 0.0003 < 0.0003 < 0.0009 < 0.0004 <0.0009 <0.0006 Zn-65 < 0.0009 < 0.0013 < 0.0011 < 0.0009 <0.0013 <0.0023 Zr-Nb-95 < 0.0013 < 0.0010 < 0.0011 < 0.0010 <0.0013 <0.0018 Ru-103 < 0.0009 < 0.0010 < 0.0010 < 0.0008 <0.0010 <0.0014 Ru-106 < 0.0059 < 0.0037 < 0.0072 < 0.0059 <0.0072 <0.0069 Cs-134 < 0.0007 < 0.0008 < 0.0008 < 0.0006 <0.0008 <0.0009 Cs-137 < 0.0006 < 0.0008 < 0.0004 < 0.0003 <0.0008 <0.0007 Ba-La-140 < 0.0014 < 0.0018 < 0.0023 < 0.0016 <0.0023 <0.0041 Ce-141 < 0.0013 < 0.0017 < 0.0015 < 0.0010 <0.0017 <0.0020 Ce-144 < 0.0041 < 0.0035 < 0.0025 < 0.0041 <0.0041 <0.0039 8-2

MNGP Table 8. Airborne particulates, quarterly composites from each location, analysis for gamma-emitting isotopes.

Activity (pCi/m3)

Cumulative Previous 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average M-5 Lab Code MAP- 1692 MAP- 3684 MAP- 5587 MAP- 6846 3

Volume(m ) 4206 4117 4600 4731 Be-7 0.079 +/- 0.015 0.103 +/- 0.013 0.081 +/- 0.016 0.062 +/- 0.010 0.081 0.073 Mn-54 < 0.0005 < 0.0008 < 0.0007 < 0.0004 <0.0008 <0.0009 Co-58 < 0.0008 < 0.0006 < 0.0008 < 0.0004 <0.0008 <0.0012 Co-60 < 0.0006 < 0.0008 < 0.0004 < 0.0004 <0.0008 <0.0009 Zn-65 < 0.0011 < 0.0006 < 0.0005 < 0.0011 <0.0011 <0.0019 Zr-Nb-95 < 0.0012 < 0.0009 < 0.0006 < 0.0006 <0.0012 <0.0017 Ru-103 < 0.0011 < 0.0010 < 0.0013 < 0.0007 <0.0013 <0.0018 Ru-106 < 0.0053 < 0.0065 < 0.0048 < 0.0045 <0.0065 <0.0079 Cs-134 < 0.0007 < 0.0008 < 0.0008 < 0.0007 <0.0008 <0.0011 Cs-137 < 0.0005 < 0.0008 < 0.0009 < 0.0005 <0.0009 <0.0008 Ba-La-140 < 0.0023 < 0.0016 < 0.0019 < 0.0016 <0.0023 <0.0045 Ce-141 < 0.0010 < 0.0021 < 0.0021 < 0.0014 <0.0021 <0.0023 Ce-144 < 0.0029 < 0.0063 < 0.0046 < 0.0035 <0.0063 <0.0053 8-3

MNGP Table 9. Pasture grass, vegetation, analysis for gamma-emitting isotopes.

Collection: 3x per year Previous Sample Description and Concentration (pCi/g wet) Annual Annual Average Average Location: M-41 (Training Center)

Date Collected 07-05-17 08-09-17 09-06-17 Lab Code MVE- 3250 MVE- 4087 MVE- 4559 Mn-54 < 0.009 < 0.007 < 0.005 < 0.009 < 0.009 Fe-59 < 0.028 < 0.029 < 0.020 < 0.029 < 0.029 Co-58 < 0.011 < 0.012 < 0.006 < 0.012 < 0.012 Co-60 < 0.009 < 0.007 < 0.008 < 0.009 < 0.009 Zn-65 < 0.018 < 0.022 < 0.014 < 0.022 < 0.022 Nb-95 < 0.009 < 0.011 < 0.006 < 0.011 < 0.011 I-131 < 0.017 < 0.026 < 0.019 < 0.026 < 0.026 Cs-134 < 0.009 < 0.010 < 0.008 < 0.010 < 0.010 Cs-137 < 0.010 < 0.011 < 0.008 < 0.011 < 0.011 Location: M-42 (Biology Station Road)

Date Collected 07-05-17 08-09-17 09-06-17 Lab Code MVE- 3251 MVE- 4088 MVE- 4560 Mn-54 < 0.012 < 0.012 < 0.006 < 0.012 < 0.011 Fe-59 < 0.016 < 0.023 < 0.011 < 0.023 < 0.022 Co-58 < 0.010 < 0.016 < 0.007 < 0.016 < 0.009 Co-60 < 0.005 < 0.016 < 0.005 < 0.016 < 0.008 Zn-65 < 0.015 < 0.026 < 0.017 < 0.026 < 0.024 Nb-95 < 0.013 < 0.017 < 0.011 < 0.017 < 0.013 I-131 < 0.023 < 0.028 < 0.013 < 0.028 < 0.043 Cs-134 < 0.012 < 0.014 < 0.006 < 0.014 < 0.012 Cs-137 < 0.010 < 0.014 < 0.008 < 0.014 < 0.013 Location: M-43 (Imholte Farm, Control)

Date Collected 07-05-17 08-09-17 09-06-17 Lab Code MVE- 3252 MVE- 4089 MVE- 4561 Mn-54 < 0.008 < 0.014 < 0.008 < 0.014 < 0.008 Fe-59 < 0.020 < 0.035 < 0.013 < 0.035 < 0.018 Co-58 < 0.008 < 0.012 < 0.009 < 0.012 < 0.009 Co-60 < 0.005 < 0.014 < 0.011 < 0.014 < 0.007 Zn-65 < 0.010 < 0.020 < 0.020 < 0.020 < 0.020 Nb-95 < 0.008 < 0.019 < 0.011 < 0.019 < 0.013 I-131 < 0.017 < 0.023 < 0.015 < 0.023 < 0.034 Cs-134 < 0.009 < 0.017 < 0.012 < 0.017 < 0.013 Cs-137 < 0.010 < 0.017 < 0.008 < 0.017 < 0.014 9-1

MNGP Table 10. River water, analysis of monthly composites for gamma-emitting isotopes.

Location: M-8 (C)

Collection: Weekly Sample Description and Concentration (pCi/L)

Period Collected January February March April May Lab Code NSa MSW-1079b MSW-1414c MSW-2274 MSW-2793 Mn-54 - < 10 < 10 < 10 < 10 Fe-59 - < 30 < 30 < 30 < 30 Co-58 - < 10 < 10 < 10 < 10 Co-60 - < 10 < 10 < 10 < 10 Zn-65 - < 30 < 30 < 30 < 30 Zr-Nb-95 - < 15 < 15 < 15 < 15 Cs-134 - < 10 < 10 < 10 < 10 Cs-137 - < 10 < 10 < 10 < 10 Ba-La-140 - < 15 < 15 < 15 < 15 Ce-144 - < 12 < 42 < 25 < 38 Period Collected June July August September October Lab Code MSW-3297 MSW-4015 MSW-4590 MSW-5418 MSW-5874 Mn-54 < 10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 < 15 Ce-144 < 27 < 22 < 33 < 21 < 20 Previous Period Collected November December Cumulative Annual Lab Code MSW-6441 NSa Average Average Mn-54 < 10 - < 10 < 10 Fe-59 < 30 - < 30 < 30 Co-58 < 10 - < 10 < 10 Co-60 < 10 - < 10 < 10 Zn-65 < 30 - < 30 < 30 Zr-Nb-95 < 15 - < 15 < 15 Cs-134 < 10 - < 10 < 10 Cs-137 < 10 - < 10 < 10 Ba-La-140 < 15 - < 15 < 15 Ce-144 < 24 - < 42 < 31 a

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

b One sample for month (02-22-17); icy conditions 02-01, 02-08 and 02-15-17.

c March 15 sample was not available due to water being frozen.

10-1

MNGP Table 10. River water, analysis of monthly composites for gamma-emitting isotopes.

Location: M-9 Collection: Weekly Sample Description and Concentration (pCi/L)

Period Collected January February March April May Lab Code MSW-444 MSW-1080 MSW-1415 MSW-2275 MSW-2794 Mn-54 < 10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 < 15 Ce-144 < 19 < 10 < 20 < 28 < 39 Period Collected June July August September October Lab Code MSW-3298 MSW-4016 MSW-4591 MSW-5419 MSW-5875 Mn-54 < 10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 < 15 Ce-144 < 18 < 36 < 28 < 19 < 25 Previous Period Collected November December Cumulative Annual Lab Code MSW-6442 MSW-6661 Average Average Mn-54 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 Ce-144 < 17 < 35 < 39 < 35 10-2

MNGP Table 11. Drinking water, City of Minneapolis, M-14, analysis of monthly composites for gross beta, iodine-131, and gamma-emitting isotopes.

Collection: Weekly Sample Description and Concentration (pCi/L)

Period Collected January February March April May Lab Code MDW-538 MDW-981 MDW-1416 MDW-2040 MDW-2795 Gross beta 2.2 +/- 0.9 1.3 +/- 0.6 1.4 +/- 0.6 1.3 +/- 0.6 < 0.9 I-131 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 Mn-54 < 10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 < 15 Ce-144 < 22 < 15 < 16 < 28 < 42 Period Collected June July August September October Lab Code MDW-3294 MDW-4131 MDW-4772 MDW-5272 MDW-6067 Gross beta 1.4 +/- 0.5 < 0.9 4.4 +/- 0.8 2.2 +/- 0.6 1.3 +/- 0.5 I-131 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 Mn-54 < 10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 < 15 Ce-144 < 27 < 18 < 22 < 21 < 38 Period Collected November December Cumulative Previous Lab Code MDW-6408 MDW-6768 Average Average Gross beta 1.4 +/- 0.6 2.8 +/- 0.7 2.0 2.5 I-131 < 1.0 < 1.0 < 1.0 < 1.0 Mn-54 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 Ce-144 < 18 < 22 < 42 < 28 11-1

MNGP Table 12. River water and drinking water, analysis of quarterly composites for tritium.

Collection: Quarterly composites of weekly collections.

Sample Type, Location and Concentration (pCi/L)

Collection Period Lab Code H-3 River Water Upstream, M-8 (C) LLD MDC 1st Quartera MSW - 1417 < 500 < 151 2nd Quarter MSW - 3402 < 500 < 183 3rd Quarter MSW - 5514 < 500 < 157 4th Quarterb MSW - 6665 < 500 < 155 Cumulative Average < 500 < 183 Previous Annual Average < 500 < 150 River Water Downstream, M-9 1st Quarter MSW - 1418 < 500 < 151 2nd Quarter MSW - 3403 < 500 < 183 3rd Quarter MSW - 5515 < 500 < 157 4th Quarter MSW - 6666 < 500 < 155 Cumulative Average < 500 < 183 Previous Annual Average < 500 < 150 Drinking Water Minneapolis, M-14 1st Quarter MDW - 1419 < 500 < 151 2nd Quarter MDW - 3401 < 500 < 183 3rd Quarter MDW - 5516 < 500 < 157 4th Quarter MDW - 6769 < 500 < 152 Cumulative Average < 500 < 183 Previous Annual Average < 500 < 150 a

Water frozen the month of January, first 3 weeks in February, and the week of March 15th.

b Water frozen during the entire month of December.

12-1

MNGP Table 13. Well water, analysis for tritium and gamma-emitting isotopes.

Sample Description and Concentration (pCi/L)

Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 Date H-3 Collected Lab Code (< 500 pCi/L) Mn-54 Fe-59 Co-58 Co-60 Zn-65 Monticello (M-11) 1/18/2017 MWW-252 233 < 179 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 15 4/19/2017 MWW-252 1794 < 153 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 7/20/2017 MWW-252 3744 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 24 10/18/2017 MWW-252 5669 < 154 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 26 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 26 Plant Well No. 1 (M-12) 1/18/2017 MWW-252 234 < 179 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 23 4/19/2017 MWW-252 1795 < 153 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 21 7/20/2017 MWW-252 3745 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 10/18/2017 MWW-252 5670 < 154 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 38 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 38 Hasbrouck (M-55) 1/18/2017 MWW-252 237 < 179 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 4/19/2017 MWW-252 1797 < 153 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 39 7/20/2017 MWW-252 3747 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 29 10/18/2017 MWW-252 5671 < 154 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 34 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 39 Imholte (M-43C) 1/18/2017 MWW-252 235 < 179 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 24 4/19/2017 MWW-252 1796 < 153 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 14 7/20/2017 MWW-252 3746 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 18 10/18/2017 MWW-252 5672 < 154 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 25 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 25 13-1

MNGP Table 14. Fish, analysis of edible portions for gamma-emitting isotopes.

Collection: Semiannually Sample Description and Concentration (pCi/g wet)

Upstream 1000' M-8 (C)

Redhors Date Collected 05-23-17 05-23-17 09-14-17 09-14-17 Lab Code MF- 2433 MF- 2434 MF- 4828 MF- 4829 Sample Type Smallmouth Shorthead Shorthead Smallmouth Bass Redhorse Redhorse Bass K-40 2.78 +/- 0.47 2.74 +/- 0.43 3.08 +/- 0.43 2.80 +/- 0.48 Mn-54 < 0.010 < 0.014 < 0.016 < 0.017 Fe-59 < 0.048 < 0.065 < 0.059 < 0.052 Co-58 < 0.023 < 0.015 < 0.014 < 0.020 Co-60 < 0.020 < 0.014 < 0.014 < 0.017 Zn-65 < 0.023 < 0.023 < 0.025 < 0.032 Nb-95 < 0.028 < 0.021 < 0.033 < 0.025 Zr-95 < 0.028 < 0.037 < 0.029 < 0.035 Cs-134 < 0.020 < 0.020 < 0.016 < 0.013 Cs-137 < 0.013 < 0.018 < 0.013 < 0.012 Ba-La-140 < 0.084 < 0.071 < 0.161 < 0.105 Ce-144 < 0.081 < 0.110 < 0.078 < 0.089 Cumulative Previous Average Average K-40 2.85 3.28 Mn-54 < 0.017 < 0.025 Fe-59 < 0.065 < 0.070 Co-58 < 0.023 < 0.024 Co-60 < 0.020 < 0.017 Zn-65 < 0.032 < 0.070 Nb-95 < 0.033 < 0.037 Zr-95 < 0.037 < 0.053 Cs-134 < 0.020 < 0.025 Cs-137 < 0.018 < 0.025 Ba-La-140 < 0.161 < 0.112 Ce-144 < 0.110 < 0.158 14-1

MNGP Table 14. Fish, analysis of edible portions for gamma-emitting isotopes.

Collection: Semiannually Sample Description and Concentration (pCi/g wet)

Downstream 1000' M-9 Date Collected 05-23-17 05-23-17 09-14-17 09-14-17 Lab Code MF- 2435 MF- 2436 MF- 4830 MF- 4831 Sample Type Shorthead Smallmouth Shorthead Shorthead Redhorse Bass Redhorse Redhorse K-40 2.34 +/- 0.43 2.74 +/- 0.47 2.99 +/- 0.36 3.26 +/- 0.46 Mn-54 < 0.015 < 0.015 < 0.014 < 0.015 Fe-59 < 0.038 < 0.030 < 0.044 < 0.045 Co-58 < 0.020 < 0.023 < 0.016 < 0.019 Co-60 < 0.014 < 0.020 < 0.013 < 0.014 Zn-65 < 0.021 < 0.038 < 0.016 < 0.030 Nb-95 < 0.028 < 0.034 < 0.019 < 0.030 Zr-95 < 0.031 < 0.032 < 0.018 < 0.036 Cs-134 < 0.019 < 0.019 < 0.015 < 0.019 Cs-137 < 0.012 < 0.011 < 0.009 < 0.014 Ba-La-140 < 0.094 < 0.099 < 0.080 < 0.104 Ce-144 < 0.073 < 0.094 < 0.073 < 0.094 Cumulative Previous Average Average K-40 2.83 3.35 Mn-54 < 0.015 < 0.016 Fe-59 < 0.045 < 0.053 Co-58 < 0.023 < 0.030 Co-60 < 0.020 < 0.017 Zn-65 < 0.038 < 0.033 Nb-95 < 0.034 < 0.034 Zr-95 < 0.036 < 0.048 Cs-134 < 0.019 < 0.021 Cs-137 < 0.014 < 0.017 Ba-La-140 < 0.104 < 0.083 Ce-144 < 0.094 < 0.145 14-2

MNGP Table 15. Aquatic invertebrates, analysis for gamma-emitting isotopes.

Collection: Semiannually Sample Description and Concentration (pCi/g wet) Cumulative Previous Average Average Upstream 1000' M-8 (C)a Date Collected 06-27-17 09-12-17 Lab Code NDa NDa Be-7 < 0.00 < 0.57 K-40 < 0.00 < 0.84 Mn-54 < 0.000 < 0.024 Fe-59 < 0.00 < 0.13 Co-58 < 0.00 < 0.068 Co-60 < 0.000 < 0.052 Zn-65 < 0.00 < 0.094 Zr-Nb-95 < 0.00 < 0.064 Ru-103 < 0.00 < 0.075 Ru-106 < 0.00 < 0.39 Cs-134 < 0.000 < 0.040 Cs-137 < 0.000 < 0.049 Ba-La-140 < 0.00 < 0.41 Ce-144 < 0.00 < 0.20 Downstream 1000' M-9 Date Collected 06-27-17 09-12-17 Lab Code MBO- 3122 MBO- 4654 Be-7 < 0.61 < 1.27 < 1.27 < 0.55 K-40 < 1.58 < 2.23 < 2.23 < 0.91 Mn-54 < 0.065 < 0.097 < 0.097 < 0.046 Fe-59 < 0.14 < 0.30 < 0.30 < 0.13 Co-58 < 0.067 < 0.076 < 0.076 < 0.046 Co-60 < 0.064 < 0.096 < 0.096 < 0.041 Zn-65 < 0.10 < 0.22 < 0.22 < 0.077 Zr-Nb-95 < 0.083 < 0.22 < 0.22 < 0.067 Ru-103 < 0.055 < 0.18 < 0.18 < 0.070 Ru-106 < 0.56 < 0.76 < 0.76 < 0.38 Cs-134 < 0.059 < 0.11 < 0.11 < 0.041 Cs-137 < 0.053 < 0.13 < 0.13 < 0.040 Ba-La-140 < 0.22 < 0.54 < 0.54 < 0.22 Ce-144 < 0.24 < 0.45 < 0.45 < 0.24 a

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

15-1

MNGP Table 16. Shoreline (SS) sediments, analysis for gamma-emitting isotopes.

Collection: Semiannually Sample Description and Concentration (pCi/g dry) Cumulative Previous Average Average Upstream 1000' M-8 (C)

Date Collected 06-27-17 09-12-17 Lab Code MSS- 3119 MSS- 4650 Be-7 < 0.10 < 0.13 < 0.13 < 0.26 K-40 11.24 +/- 0.57 10.41 +/- 0.54 10.82 9.90 Mn-54 < 0.013 < 0.011 < 0.013 < 0.016 Fe-59 < 0.033 < 0.042 < 0.042 < 0.043 Co-58 < 0.018 < 0.015 < 0.018 < 0.020 Co-60 < 0.014 < 0.012 < 0.014 < 0.015 Zn-65 < 0.032 < 0.041 < 0.041 < 0.037 Nb-95 < 0.017 < 0.022 < 0.022 < 0.023 Zr-95 < 0.025 < 0.030 < 0.030 < 0.047 Ru-103 < 0.011 < 0.016 < 0.016 < 0.030 Ru-106 < 0.089 < 0.079 < 0.089 < 0.13 Cs-134 < 0.014 < 0.012 < 0.014 < 0.012 Cs-137 < 0.012 < 0.012 < 0.012 < 0.017 Ba-La-140 < 0.052 < 0.069 < 0.069 <0.09 Ce-144 < 0.077 < 0.070 < 0.077 <0.08 Downstream 1000' M-9 Date Collected 06-27-17 09-12-17 Lab Code MSS- 3120 MSS- 4652 Be-7 < 0.13 < 0.15 < 0.15 < 0.18 K-40 10.58 +/- 0.57 9.93 +/- 0.55 10.25 10.28 Mn-54 < 0.016 < 0.010 < 0.016 < 0.014 Fe-59 < 0.038 < 0.041 < 0.041 < 0.054 Co-58 < 0.018 < 0.014 < 0.018 < 0.023 Co-60 < 0.012 < 0.014 < 0.014 < 0.013 Zn-65 < 0.033 < 0.037 < 0.037 < 0.031 Nb-95 < 0.024 < 0.021 < 0.024 < 0.032 Zr-95 < 0.026 < 0.033 < 0.033 < 0.023 Ru-103 < 0.014 < 0.016 < 0.016 < 0.025 Ru-106 < 0.12 < 0.10 < 0.12 < 0.12 Cs-134 < 0.015 < 0.016 < 0.016 < 0.010 Cs-137 0.045 +/- 0.017 0.038 +/- 0.017 0.042 0.030 Ba-La-140 < 0.043 < 0.091 < 0.091 < 0.12 Ce-144 < 0.073 < 0.077 < 0.077 < 0.11 16-1

MNGP Table 16. Shoreline (SS) sediments, analysis for gamma-emitting isotopes (continued).

Sample Description and Concentration (pCi/g dry) Cumulative Previous Average Average Montissippi Park M-15 Date Collected 06-27-17 09-12-17 Lab Code MSS- 3121 MSS- 4653 Be-7 < 0.11 < 0.13 < 0.13 < 0.28 K-40 9.89 +/- 0.57 9.49 +/- 0.55 9.69 10.27 Mn-54 < 0.018 < 0.015 < 0.018 < 0.017 Fe-59 < 0.034 < 0.042 < 0.042 < 0.046 Co-58 < 0.010 < 0.017 < 0.017 < 0.020 Co-60 < 0.012 < 0.015 < 0.015 < 0.008 Zn-65 < 0.032 < 0.032 < 0.032 < 0.044 Nb-95 < 0.018 < 0.027 < 0.027 < 0.020 Zr-95 < 0.025 < 0.034 < 0.034 < 0.025 Ru-103 < 0.014 < 0.019 < 0.019 < 0.018 Ru-106 < 0.097 < 0.12 < 0.12 < 0.16 Cs-134 < 0.013 < 0.012 < 0.013 < 0.014 Cs-137 0.030 +/- 0.014 0.034 +/- 0.016 0.032 < 0.019 Ba-La-140 < 0.064 < 0.16 < 0.16 < 0.10 Ce-144 < 0.071 < 0.082 < 0.082 < 0.12 16-2