L-MT-17-037, 2016 Annual Radiological Environmental Operating Report

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2016 Annual Radiological Environmental Operating Report
ML17131A069
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 05/10/2017
From: Gardner P
Northern States Power Company, Minnesota, Xcel Energy Inc
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
L-MT-17-037
Download: ML17131A069 (91)


Text

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

RESPONSIBLE BY NATURE<!>

800 .895.4999 xcelenergy. com May 10,2017 L-MT-17-037 10 CFR 50, Appendix I ATTN : Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Monticello Nuclear Generating Plant Docket 50-263 Renewed Facility Operating License No. DPR-22 2016 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 Radiologica l Environmental Operating Report, under MNGP's "Radiological Environmental Monitoring Program," for year 2016.

Summary of Commitments

,es no new commitments and no revisions to existing commitments.

Peter A. ardrner Site Vice e 1dent, Monticello Nuclear Generating Plant Northern States Power Company- Minnesota Enclosures (1) cc: Administrator, Region Ill, USNRC Project Manager, Monticello, Resident Inspector, Monticello Minnesota Department of Commerce

ENCLOSURE 1 RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM JANUARY 1 - DECEMBER 31, 2016 89 pages follow

  • All 1""\1 Environmental, Inc.

Midwest Laboratory 700 Landwehr Road

  • Northbrook, ll60062-2310 phone (847) 564-0700 , fax (847) 564-4517 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, 2016 Prepared under Contract by ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8010 Approved:

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 3.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)......................... 3 3.2 Program Design and Data Interpretation ................................................................ 3 3.3 Program Description ............................................................................................... 4 3.4 Program Execution ................................................................................................. 5 3.5 Program Modifications ............................................................................................ 5 3.6 Laboratory Procedures ........................................................................................... 6 3.7 Land Use Census ................................................................................................... 6 4.1 RESULTS AND DISCUSSION ............................................................................................ 7 4.2 Atmospheric Nuclear Detonations and Nuclear Accidents...................................... 7 4.3 Summary of Preoperational Data ........................................................................... 7 4.4 Program Findings ................................................................................................... 8 5.0 FIGURES AND TABLES ..................................................................................................... 12

6.0 REFERENCES

........................................................................................................................... 24 APPENDICES A Interlaboratory Comparison Program Results.................................................................... A-1 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 ...................................................................... 13 5.2 Sampling Locations ........................................................................................................ 14 5.3 Missed Collections and Analyses .......................................................................................17 5.4 Radiation Environmental Monitoring Program Summary ............................................... 20 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 .......................................... 18 5-2 Airborne Particulates; analysis for gross beta, average mean of all indicator locations versus control location .............................................................................................. 19 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, 2016.

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 2016 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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3.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP) 3.2 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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3.3 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.

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

(1) TLDs M-2C, TLD found missing in the field for the third quarter of 2016. TLDs were also found missing in the field from locations M-3A, M-11A and M-12A for the fourth quarter of 2016.

(2) Air Particulates / Air Iodine:

M-05, Air particulate / air iodine sample for the week ending 9/7/16 was calculated to have a reduced sample volume due to a reduced air sampler run time of 29.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

M-04, Air particulate filter sample for the week ending 9/14/16 was found offset in sample head.

(3) Surface Water:

M-008, River water was frozen for the months of January 2016 and February 2016 and the week of 3/2/16.

M-001, Water was frozen from 12/14/16 through 12/28/16.

(4) Drinking Water:

M-14, weekly sample from 6/29/16 was lost and not included in the June monthly composite sample.

(5) Bottom Organisms:

M-8 and M-9 were not collected in 2016 due to dangerous river conditions. Unavailability due to cold water temperature once the river was at a safe level.

(6) Shoreline Sediment:

M-8, M-9 and M-15 were not collected in the first half of the year due to dangerous river conditions.

Deviations from the program are summarized in Table 5.3.

3.5 Program Modifications No significant modifications were made to the MNGP Radiological Environmental Monitoring Program in 2016.

3.6 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, 2016). The QA Program includes participation in Interlaboratory Comparison (crosscheck) Programs. Results obtained in the crosscheck programs are presented in Appendix A.

3.7 Land Use Census In accordance with the MNGP Chemistry Manual, Procedure I.05.41, Annual Land Use Census and Critical Receptor Identification, a land use census shall be conducted and shall identify the location of the nearest milk animal, meat animal, the nearest residence, and the nearest garden of greater than 500 ft2 producing fresh leafy vegetables, in each of the 16 meteorological sectors within a 5 mile radius. The census shall also identify the locations of all milk animals, meat animals and all gardens of greater than 500 ft2 producing broad leaf vegetation in each of the meteorological sectors within a distance of three miles. This census shall be conducted at least once per year between the dates of May 1 and October 31. New locations shall be added to the radiation environmental monitoring program within 30 days and sampling locations having lower calculated doses or a lower dose commitment may be deleted from this monitoring program after October 31 of the year in which the land use census was conducted.

The 2016 land use census was conducted between September 12 and September 20, 2016. The survey was performed using door-to-door surveys and visual observations while driving; additionally, inputs from the 2015 field data forms and Homeland Security Emergency Management Monticello Basemap were used in determining changes in land use. All locations identified were mapped on Delorme Street Atlas using a hand-held GPS unit.

There was one sector in which the highest D/Q values for gardens increased by greater than 20%. The change in this sector is due to a closer residence planting a garden in 2016 where there was no garden in 2015. The highest D/Q garden for 2016 did not change from the 2015 highest D/Q garden. There were five sectors where the highest D/Q values for Meat animals increased by greater than 20%. The changes in the sectors are due to a closer residence raising animals for meat consumption in the affected sectors. The highest D/Q meat animal changed in the 2016 census. There were no sectors were the highest D/Q values for the nearest residence increased by more than 20%. There currently are no milking animals within a five mile radius of the plant. Vegetation sampling is currently being performed in lieu of milk sampling. There are no crops being irrigated from the Mississippi River.

The Critical Receptor for 2016 remained the same as 2015 and 2014 (Child, Thyroid located 1.15 mi SSE with exposure to Ground, Plume, Inhalation and Vegetable Pathways). Details of the land use census are contained in the Land Use Census and Critical Receptor Report, Monticello Nuclear Generating Plant, Chemistry and Radiation Protection Department.

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4.1 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.

4.2 Atmospheric Nuclear Detonations and Nuclear Accidents There were no reported accidents involving significant release to the environment at nuclear reactor facilities in 2016. The Fukushima Daiichi nuclear accident occurred March 11, 2011.

There were no reported atmospheric nuclear tests in 2016. The last reported test was conducted on October 16, 1980 by the Peoples Republic of China.

4.3 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 3 3 beta measurements in 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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4.4 Program Findings Results obtained show background levels of radioactivity in environmental samples collected outside of the Site Protected Area in 2016.

Tritium was identified in some groundwater samples collected within the site Protected Area, but not in offsite or domestic well samples.

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 (15.1 and 14.3 mRem/91 days, respectively).

The mean for special interest locations was 14.6 mRem/91 days and the mean for the control locations was 15.4 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 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 almost identical at 3

both indicator and control locations (0.024 and 0.026 pCi/m ,respectively), similar to levels observed from 1999 through 2015. 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 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 2015.

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 0.076 pCi/m for the indicator locations and 0.069 pCi/m for the control locations. 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 activity in Minneapolis drinking water averaged 2.6 pCi/L and was similar to average levels observed from 1998 through 2015. Gross beta averages are tabulated below. No indication plant operational effects were indicated.

Year Gross Beta (pCi/L) Year Gross Beta (pCi/L) 1999 2.2 2008 2.1 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 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 2016 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, 2016. Iodine-131 concentrations measured below 0.054 pCi/g wet weight in all samples. These samples are required when milk samples are not available.

Crops A vegetation collection was not required for 2016. 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.

Fish Eight fish were analyzed in 2016 consisting of two fish collected from upstream locations and two collected from downstream locations in May 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 3.35 pCi/g wet weight for four upstream samples and 3.28 pCi/g wet weight for the four downstream samples. These results agree with 2015 results. Other gamma-emitting isotopes remained below detection limits. There was no indication of a plant effect.

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Shoreline Sediments Upstream, downstream and downstream recreational area shoreline sediment collections were made in N o v e m b e r , 2016, and analyzed for gamma-emitting isotopes. A level of cesium-137 was detected in one downstream samples (M-9), at a concentration of 0.030 pCi/g dry weight.

Similar levels of activity have been observed since 1978, and are indicative of the influence of fallout deposition. Naturally-occurring beryllium-7 and potassium-40 were also detected. There was no indication of a plant effect.

Storm W ater Run-off (on-site)

All of five storm water run-off samples were below detection limits. Gamma isotopic analysis results also measured below detection limits for all five samples analyzed in 2016.

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 12

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)

Periphyton or 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 14

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 15

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 Osowski Fun Market 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.

16

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-008 January 16 None No composite.

Water frozen entire month; SW Gamma M-008 February 16 None No composite.

SW Gamma M-008 3/2/16 Water frozen. None SS Gamma M-8 Spring 16 Dangerous river conditions. None SS Gamma M-9 Spring 16 Dangerous river conditions. None None SS Gamma M-15 Spring 16 Dangerous river conditions.

Weekly sample lost; Beta, Not included in June 16 DW I-131, M-014 6/29/16 None Gamma Composite Gamma TLD M-2C 3rd QTR TLD missing in field. None AP/AI Beta, I-131 M-05 9/7/16 29.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> run time. None Beta, I-131 AP/AI M-04 9/14/16 Filter offset in sample head. Counsel Technicians.

M-3A TLD Gamma 4th Qtr TLD missing in field. None TLD Gamma M-11A 4th Qtr TLD missing in field. None TLD Gamma M-12A 4th Qtr TLD missing in field. None BO Gamma M-8 2016 Dangerous river conditions. None BO Gamma M-9 2016 Dangerous river conditions. None 12/14/16 to SW Gamma M-001 Water Frozen. None 12/28/16 17

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

NO Inner Ring Outer Ring 20 19 18 17 16 15 mR/91 days 14 13 12 11 10 2000 2001 0 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 18

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 Control (M-1) 0.035 0.033 0.031 0.029 0.027 0.025 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 15 19

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, 2016

( 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 53 3.0 15.1 (53/53) M-06A, 17.2 (4/4) (See Control 0 General Area at ( 11.4-19.2) 0.6 mi @ 133°/SE (15.3-18.9) below.)

Site Boundary) mRem/91 days)

TLD (Outer Ring, Gamma 64 3.0 14.3 (64/64) M-14B 16.2 (4/4) (See Control 0 4-5 mi. distant) ( 11.0-19.6) 4.5 mi @ 228°/NW (14.1-18.2) below.)

mRem/91 days)

TLD (Special Gamma 36 3.0 15.1 (36/36) M-I-13 17.4 (4/4) (See Control 0 Interest Areas) ( 9.4-23.0) OCA fence north (15.2-23.0) below.)

mRem/91 days)

TLD (Control) Gamma 15 3.0 None M-02C 17.5 (4/4) 15.4 (15/15) 0 mRem/91 days) 11.2 mi @ 47°/NE (16.7-18.4) ( 13.3-18.4)

Airborne Pathway Airborne GB 258 0.002 0.026 (204/204) M-3, Air Station 0.027 (51/51) 0.028 (52/52) 0 Particulates (0.010-0.060) 0.6 mi @ 104°/ESE (0.009-0.088) (0.013-0.060)

(pCi/m3)

GS 20 Be-7 0.015 0.070 (16/16) M-3, Air Station 0.081 (4/4) 0.069 (4/4) 0 (0.049-0.087) 0.6 mi @ 104°/ESE (0.071-0.095) (0.050-0.082)

Mn-54 0.0010 < LLD - - < LLD 0 Co-58 0.0012 < LLD - - < LLD 0 Co-60 0.0009 < LLD - - < LLD 0 Zn-65 0.0018 < LLD - - < LLD 0 Zr-Nb-95 0.0018 < LLD - - < LLD 0 Ru-103 0.0018 < LLD - - < LLD 0 Ru-106 0.0081 < LLD - - < LLD 0 Cs-134 0.0011 < LLD - - < LLD 0 Cs-137 0.0011 < LLD - - < LLD 0 Ba-La-140 0.0046 < LLD - - < LLD 0 Ce-141 0.0023 < LLD - - < LLD 0 Ce-144 0.0053 < LLD - - < LLD 0 Airborne Iodine I-131 258 0.03 < LLD - - < LLD 0 (pCi/m3) 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,2016

( 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 River Water (pCi/L) H-3 8 500 < LLD - - < LLD 0 GS 22 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 35 < LLD - - < LLD 0 Drinking Water GB 12 1.0 2.6 (12/12) M-14, Minneapolis 2.6 (12/12) None 0 (pCi/L) (1.2-3.2) 37.0 mi. @ 132° /SE (1.2-3.2)

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 28 < LLD - - None 0 Well Water H-3 16 500 < LLD - - < LLD 0 (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 15 < LLD - - < LLD 0 Ce-144 29 < LLD - - < LLD 0 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, 2016

( County, State )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLD b Mean (F)c Mean (F)c Mean (F)c Routine (Units) Analysesa Rangec Location d Rangec Rangec Resultse Waterborne Pathway Shoreline GS 3 Sediments Be-7 0.28 < LLD M-09, Downstream - < LLD 0 (pCi/g dry) < 1000' of discharge K-40 0.10 10.28 (2/2) M-09, Downstream 10.28 (1/1) 9 .90 (1/1) 0 (10.27-10.28) < 1000' of discharge -

Mn-54 0.017 < LLD - - < LLD 0 Fe-59 0.054 < LLD - - < LLD 0 Co-58 0.023 < LLD - - < LLD 0 Co-60 0.015 < LLD - - < LLD 0 Zn-65 0.044 < LLD - - < LLD 0 Nb-95 0.032 < LLD - - < LLD 0 Zr-95 0.047 < LLD - - < LLD 0 Ru-103 0.030 < LLD - - < LLD 0 Ru-106 0.16 < LLD - - < LLD 0 Cs-134 0.014 < LLD - - < LLD 0 Cs-137 0.019 0.029 (2/4) M-09, Downstream (0.030 (1/3)- < LLD 0 (0.024-0.034) < 1000' of discharge -

Ba-La-140 0.12 < LLD - - < LLD 0 Ce-144 0.12 < LLD - < LLD 0 22

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, 2016

( 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 0.011 < LLD - - < LLD 0 Weeds, Leaves) Fe-59 0.028 < LLD - - < LLD 0 Co-58 0.009 < LLD - - < LLD 0 (pCi/gwet) Co-60 0.008 < LLD - - < LLD 0 Zn-65 0.024 < LLD - - < LLD 0 Nb-95 0.013 < LLD - - < LLD 0 I-131 0.054 < LLD - - < LLD 0 Cs-134 0.013 < LLD - - < LLD 0 Cs-137 0.014 < LLD - - < LLD 0 Fish GS 8 (pCi/g wet) K-40 0.10 3.35 (4/4) M-09, Downstream 3.35 (4/4) 3.28 (4/4) 0 (3.01-3.86) < 1000' of discharge (3.01-3.86) (2.86-3.97)

Mn-54 0.025 < LLD - - < LLD 0 Fe-59 0.070 < LLD - - < LLD 0 Co-58 0.030 < LLD - - < LLD 0 Co-60 0.017 < LLD - - < LLD 0 Zn-65 0.070 < LLD - - < LLD 0 Zr-Nb-95 0.037 < LLD - - < LLD 0 Cs-134 0.025 < LLD - - < LLD 0 Cs-137 0.025 < LLD - - < LLD 0 Ba-La-140 0.112 < LLD - - < LLD 0 Ce-144 0.158 < 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.

23

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 2015.

2001b through 2016b. Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January - December, 2000 through 2015.

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.

2009. Quality Assurance Program Manual, Rev. 3, 14 November 2012.

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

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

2016. Quality Manual, Rev.2, 9 May 2016.

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.

24

6.0 REFERENCES

CITED (continued)

Scannell, M. J., J. Giard, J. Raimondi. 2009. Environmental Neutron TLD Monitoring for ISFSI (Presentation and Report). 2009 RETS/REMP Workshop, South Bend, IN.

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 2014. Monticello Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1 to December 31, 2008 through 2012. Minneapolis, Minnesota.

2009 to 2014. Prairie Island Nuclear Generating Plant, Annual Radiation Environmental Monitoring Report to the U.S. Nuclear Regulatory Commission, January 1 to December 31, 2008 through 2012.

Minneapolis, Minnesota.

25

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

January, 2016 through December, 2016

Appendix A Interlaboratory 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 REMP specific analytical results from the in-house duplicate program for the past twelve months. Acceptance is based on the difference of the results being less than the sum of the errors.

Complete analytical data for duplicate analyses is available upon request.

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

Results in Table A-7 were obtained through participation in the 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 laboratory precision at the 1 sigma level for various analyses. The acceptance criteria in Table A-3 is set at +/- 2 sigma.

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

A1

Attachment A ACCEPTANCE CRITERIA FOR SPIKED SAMPLES LABORATORY PRECISION: ONE STANDARD DEVIATION VALUES FOR VARIOUS ANALYSES a One standard deviation Analysis Level for single determination Gamma Emitters 5 to 100 pCi/liter or kg 5.0 pCi/liter

> 100 pCi/liter or kg 5% of known value Strontium-89b 5 to 50 pCi/liter or kg 5.0 pCi/liter

> 50 pCi/liter or kg 10% of known value Strontium-90b 2 to 30 pCi/liter or kg 5.0 pCi/liter

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

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

> 100 pCi/liter 5% of known value Tritium 4,000 pCi/liter +/- 1 =

169.85 x (known)0.0933

> 4,000 pCi/liter 10% of known value Radium-226,-228 0.1 pCi/liter 15% of known value Plutonium 0.1 pCi/liter, gram, or sample 10% of known value Iodine-131, 55 pCi/liter 6 pCi/liter Iodine-129b > 55 pCi/liter 10% of known value Uranium-238, 35 pCi/liter 6 pCi/liter Nickel-63b > 35 pCi/liter 15% of known value Technetium-99b Iron-55b 50 to 100 pCi/liter 10 pCi/liter

> 100 pCi/liter 10% of known value Other Analyses b --- 20% of known value a

From EPA publication, Environmental Radioactivity Laboratory Intercomparison Studies Program", Fiscal Year, 1981-1982, EPA-600/4-81-004.

b Laboratory limit.

A2

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

RAD study Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result Result Limits Acceptance ERW-1392 4/4/2016 Sr-89 43.5 +/- 4.3 48.2 37.8 - 55.6 Pass ERW-1392 4/4/2016 Sr-90 27.5 +/- 1.9 28.5 20.7 - 33.1 Pass ERW-1394 b 4/4/2016 Ba-133 65.2 +/- 3.8 58.8 48.7 - 64.9 Fail ERW-1394 c 4/4/2016 Ba-133 57.8 +/- 5.3 58.8 48.7 - 64.9 Pass ERW-1394 4/4/2016 Cs-134 43.7 +/- 3.0 43.3 34.6 - 47.6 Pass ERW-1394 4/4/2016 Cs-137 86.1 +/- 5.3 78.4 70.6 - 88.9 Pass ERW-1394 4/4/2016 Co-60 108 +/- 44 102 91.8 - 114 Pass ERW-1394 4/4/2016 Zn-65 240 +/- 13 214 193 - 251 Pass ERW-1397 4/4/2016 Gr. Alpha 52.0 +/- 2.2 62.7 32.9 - 77.8 Pass ERW-1397 4/4/2016 Gr. Beta 33.9 +/- 1.2 39.2 26.0 - 46.7 Pass ERW-1400 4/4/2016 I-131 24.7 +/- 0.6 26.6 22.1 - 31.3 Pass ERW-1402 4/4/2016 Ra-226 15.6 +/- 0.5 15.2 11.3 - 17.4 Pass ERW-1402 4/4/2016 Ra-228 5.28 +/- 0.76 5.19 3.12 - 6.93 Pass ERW-1403 4/4/2016 Uranium 4.02 +/- 0.42 4.64 3.39 - 5.68 Pass ERW-1405 4/4/2016 H-3 8,150 +/- 270 7,840 6,790 - 8,620 Pass SPW-2845 7/7/2015 Ba-133 60.3 +/- 5.7 64.7 53.9 - 71.2 Pass SPW-2845 7/7/2015 Cs-134 48.8 +/- 9.3 50.1 40.3 - 55.1 Pass SPW-2845 7/7/2015 Cs-137 101 +/-8 89.8 80.8 - 101 Pass SPW-2845 7/7/2015 Co-60 65.1 +/- 5.8 59.9 53.9 - 68.4 Pass SPW-2845 7/7/2015 Zn-65 288 +/- 29 265 238 - 310 Pass ERW-3485 7/11/2016 Sr-89 43.3 +/- 6.5 53.3 42.3 - 60.9 Pass ERW-3485 7/11/2016 Sr-90 39.0 +/- 2.8 39.2 28.8 - 45.1 Pass ERW-3487 7/11/2016 Ba-133 83.3 +/- 4.9 82.9 69.7 - 91.2 Pass ERW-3487 7/11/2016 Cs-134 62.5 +/- 4.4 65.3 53.1 - 71.8 Pass ERW-3487 7/11/2016 Cs-137 98.1 +/- 5.6 95.2 85.7 - 107 Pass ERW-3487 7/11/2016 Co-60 122 +/-5 117 105 - 131 Pass ERW-3487 7/11/2016 Zn-65 124 +/-9 113 102 - 134 Pass ERW-3490 7/11/2016 Gr. Alpha 46.6 +/- 2.2 48.1 25.0 - 60.5 Pass ERW-3490 7/11/2016 Gr. Beta 26.8 +/- 1.1 28.6 18.2 - 36.4 Pass ERW-3492 7/11/2016 I-131 23.7 +/- 1.0 24.9 20.7 - 29.5 Pass ERW-3493 7/11/2016 Ra-226 12.9 +/- 0.4 12.3 9.2 - 14.2 Pass ERW-3493 7/11/2016 Ra-228 5.8 +/- 0.8 5.8 3.5 - 7.6 Pass ERW-3493 7/11/2016 Uranium 32.8 +/- 0.8 25.2 28.4 - 39.3 Pass ERW-3495 7/11/2016 H-3 12,400 +/- 334 12,400 10,800 - 13,600 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).

b No reason determined for failure of Ba-133 result.

c The result of reanalysis (Compare to original result, footnoted "b" above).

A1-1

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

mrem c

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

Environmental, Inc. Group 1 2016-1 10/7/2016 Spike 1 135.0 148.3 0.10 2016-1 10/7/2016 Spike 2 135.0 144.3 0.07 2016-1 10/7/2016 Spike 3 135.0 133.2 -0.01 2016-1 10/7/2016 Spike 4 135.0 139.6 0.03 2016-1 10/7/2016 Spike 5 135.0 128.4 -0.05 2016-1 10/7/2016 Spike 6 135.0 123.9 -0.08 2016-1 10/7/2016 Spike 7 135.0 124.0 -0.08 2016-1 10/7/2016 Spike 8 135.0 121.5 -0.10 2016-1 10/7/2016 Spike 9 135.0 148.3 0.10 2016-1 10/7/2016 Spike 10 135.0 126.8 -0.06 2016-1 10/7/2016 Spike 11 135.0 123.3 -0.09 2016-1 10/7/2016 Spike 12 135.0 137.9 0.02 2016-1 10/7/2016 Spike 13 135.0 126.0 -0.07 2016-1 10/7/2016 Spike 14 135.0 127.2 -0.06 2016-1 10/7/2016 Spike 15 135.0 144.5 0.07 2016-1 10/7/2016 Spike 16 135.0 140.5 0.04 2016-1 10/7/2016 Spike 17 135.0 146.0 0.08 2016-1 10/7/2016 Spike 18 135.0 127.7 -0.05 2016-1 10/7/2016 Spike 19 135.0 146.8 0.09 2016-1 10/7/2016 Spike 20 135.0 122.6 -0.09 2016-1 10/7/2016 Spike 21 135.0 108.6 -0.20 2016-1 10/7/2016 Spike 22 135.0 119.6 -0.11 2016-1 10/7/2016 Spike 23 135.0 135.1 0.00 2016-1 10/7/2016 Spike 24 135.0 116.2 -0.14 2016-1 10/7/2016 Spike 25 135.0 118.9 -0.12 2016-1 10/7/2016 Spike 26 135.0 128.5 -0.05 2016-1 10/7/2016 Spike 27 135.0 115.6 -0.14 2016-1 10/7/2016 Spike 28 135.0 126.4 -0.06 2016-1 10/7/2016 Spike 29 135.0 115.0 -0.15 2016-1 10/7/2016 Spike 30 135.0 147.3 0.09 Mean (Spike 1-30) 130.4 0.03 Passd Standard Deviation (Spike 1-30) 11.5 0.09 Passd a

Table A-2 assumes 1 roentgen = 1 rem (NRC -Health Physics Questions and Answers 10 CFR Part 20 - Question 96 - Page Last Reviewed/Updated Thursday, October 01, 2015).

b 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.

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

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

mrem c

Lab Code Irradiation Delivered Reported Performance d

Date Description Dose Dose Quotient (P) Acceptance Environmental, Inc. Group 2 2016-2 10/7/2016 Spike 31 87.0 83.0 -0.05 2016-2 10/7/2016 Spike 32 87.0 88.3 0.01 2016-2 10/7/2016 Spike 33 87.0 83.1 -0.04 2016-2 10/7/2016 Spike 34 87.0 81.4 -0.06 2016-2 10/7/2016 Spike 35 87.0 78.9 -0.09 2016-2 10/7/2016 Spike 36 87.0 80.3 -0.08 2016-2 10/7/2016 Spike 37 87.0 101.1 0.16 2016-2 10/7/2016 Spike 38 87.0 78.3 -0.10 2016-2 10/7/2016 Spike 39 87.0 86.6 0.00 2016-2 10/7/2016 Spike 40 87.0 81.8 -0.06 2016-2 10/7/2016 Spike 41 87.0 84.8 -0.03 2016-2 10/7/2016 Spike 42 87.0 79.9 -0.08 2016-2 10/7/2016 Spike 43 87.0 80.8 -0.07 2016-2 10/7/2016 Spike 44 87.0 80.2 -0.08 2016-2 10/7/2016 Spike 45 87.0 82.7 -0.05 2016-2 10/7/2016 Spike 46 87.0 104.0 0.20 2016-2 10/7/2016 Spike 47 87.0 86.1 -0.01 2016-2 10/7/2016 Spike 48 87.0 104.0 0.20 2016-2 10/7/2016 Spike 49 87.0 86.1 -0.01 2016-2 10/7/2016 Spike 50 87.0 90.8 0.04 2016-2 10/7/2016 Spike 51 87.0 85.7 -0.01 2016-2 10/7/2016 Spike 52 87.0 86.5 -0.01 2016-2 10/7/2016 Spike 53 87.0 86.4 -0.01 2016-2 10/7/2016 Spike 54 87.0 92.6 0.06 2016-2 10/7/2016 Spike 55 87.0 88.6 0.02 2016-2 10/7/2016 Spike 56 87.0 78.9 -0.09 2016-2 10/7/2016 Spike 57 87.0 82.6 -0.05 2016-2 10/7/2016 Spike 58 87.0 80.6 -0.07 2016-2 10/7/2016 Spike 59 87.0 89.9 0.03 2016-2 10/7/2016 Spike 60 87.0 85.0 -0.02 Mean (Spike 31-60) 86.0 0.01 Pass Standard Deviation (Spike 31-60) 6.9 0.08 Pass a

Table A-2 assumes 1 roentgen = 1 rem (NRC -Health Physics Questions and Answers 10 CFR Part 20 - Question 96 - Page Last Reviewed/Updated Thursday, October 01, 2015).

b 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.

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 2s, n=1 c Activity Limits d Acceptance SPW-290 1/21/2016 Sr-90 38.6 +/- 1.5 37.3 22.4 - 52.2 Pass SPW-292 1/21/2016 Sr-90 35.8 +/- 1.6 37.3 22.4 - 52.2 Pass SPW-294 1/21/2016 C-14 4,689 +/- 18 4,735 2,841 - 6,629 Pass SPW-414 2/1/2016 Ra-228 18.4 +/- 2.2 17.7 10.6 - 24.8 Pass W-020416 2/4/2016 Gr. Alpha 20.8 +/- 0.4 20.1 12.0 - 28.1 Pass W-020416 2/4/2016 Gr. Beta 29.7 +/- 0.3 28.9 17.3 - 40.4 Pass W-021716 2/17/2016 Ra-226 17.9 +/- 0.5 16.7 10.0 - 23.4 Pass W-030716 3/7/2016 Gr. Alpha 16.3 +/- 0.8 20.1 12.0 - 28.1 Pass W-030716 3/7/2016 Gr. Beta 27.0 +/- 0.7 28.9 17.3 - 40.4 Pass SPDW-70046 3/29/2016 Ra-226 13.4 +/- 0.4 16.7 10.0 - 23.4 Pass SPW-1163 3/22/2016 Ra-228 4.2 +/- 0.7 4.4 2.6 - 6.2 Pass SPW-1235 3/29/2016 Gr. Alpha 21.0 +/- 0.4 20.1 12.0 - 28.1 Pass SPW-1235 3/29/2016 Gr. Beta 29.4 +/- 0.3 28.9 17.3 - 40.4 Pass SPW-1739 4/21/2016 Ra-228 16.2 +/- 2.0 17.7 10.6 - 24.8 Pass SPW-2052 4/21/2016 Ra-226 16.0 +/- 0.5 16.7 10.0 - 23.4 Pass W-042616 4/21/2016 Fe-55 1,519 +/- 61 1,482 889 - 2,075 Pass SPW-1823 4/23/2016 Gr. Alpha 21.0 +/- 0.4 20.1 12.0 - 28.1 Pass SPW-1823 4/23/2016 Gr. Beta 26.6 +/- 0.3 28.9 17.3 - 40.4 Pass SPW-1998 4/29/2016 Cs-134 35.9 +/- 6.0 36.2 21.7 - 50.6 Pass SPW-1998 4/29/2016 Cs-137 82.5 +/- 7.6 71.9 43.1 - 100.6 Pass SPW-2097 5/3/2016 H-3 3,349 +/- 184 3,280 1,968 - 4,592 Pass SPW-2132 5/4/2016 H-3 3,174 +/- 178 3,280 1,968 - 4,592 Pass SPW-2229 5/7/2016 H-3 3,182 +/- 179 3,280 1,968 - 4,592 Pass SPW-2313 5/13/2016 H-3 3,183 +/- 179 3,280 1,968 - 4,592 Pass SPW-2341 5/13/2016 H-3 3,201 +/- 178 3,280 1,968 - 4,592 Pass SPW-2374 5/14/2016 H-3 3,037 +/- 175 3,280 1,968 - 4,592 Pass SPW-2411 5/17/2016 Sr-90 37.3 +/- 1.6 37.3 22.4 - 52.2 Pass SPW-2455 5/19/2016 Gr. Alpha 19.3 +/- 0.4 20.1 12.0 - 28.1 Pass SPW-2455 5/19/2016 Gr. Beta 28.6 +/- 0.3 28.9 17.3 - 40.4 Pass SPW-2457 5/19/2016 U-238 48.2 +/- 2.4 41.7 25.0 - 58.4 Pass SPW-2504 5/20/2016 H-3 3,181 +/- 178 3,280 1,968 - 4,592 Pass SPW-2528 5/23/2016 H-3 2,998 +/- 175 3,280 1,968 - 4,592 Pass SPW-2566 5/24/2016 Gr. Alpha 19.8 +/- 0.5 20.1 12.0 - 28.1 Pass SPW-2566 5/24/2016 Gr. Beta 30.4 +/- 0.3 28.9 17.3 - 40.4 Pass W-053116 4/29/2016 Cs-134 34.0 +/- 5.0 36.2 21.7 - 50.6 Pass W-053116 4/29/2016 Cs-137 78.8 +/- 7.0 71.9 43.1 - 100.6 Pass SPW-2704 6/1/2016 Sr-90 38.0 +/- 1.6 37.3 22.4 - 52.2 Pass SPW-2719 6/2/2016 Ra-228 18.1 +/- 2.1 17.7 10.6 - 24.8 Pass SPW-2749 6/3/2016 H-3 3,197 +/- 180 3,280 1,968 - 4,592 Pass SPW-2843 6/7/2016 H-3 3,133 +/- 179 3,280 1,968 - 4,592 Pass SPW-3227 6/17/2016 Ra-226 18.6 +/- 0.4 16.7 10.0 - 23.4 Pass W-061716 4/29/2016 Cs-134 37.3 +/- 8.2 36.2 21.7 - 50.6 Pass W-061716 4/29/2016 Cs-137 79.7 +/- 10.8 71.9 43.1 - 100.6 Pass SPW-3240 6/28/2016 Gr. Alpha 25.3 +/- 0.5 20.1 12.0 - 28.1 Pass SPW-3240 6/28/2016 Gr. Beta 27.1 +/- 0.3 28.9 17.3 - 40.4 Pass A3-1

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

Lab Code Date Analysis Laboratory results Known Control 2s, n=1 c Activity Limits d Acceptance SPW-3241 7/1/2016 H-3 8,821 +/- 283 8,650 5,190 - 12,110 Pass SPW-3309 7/1/2016 H-3 8,619 +/- 278 8,650 5,190 - 12,110 Pass SPW-3313 7/1/2016 Ra-228 16.6 +/- 2.0 17.7 10.6 - 24.8 Pass SPW-3328 7/6/2016 Sr-89 13.4 +/- 9.2 14.8 8.9 - 20.7 Pass SPW-3328 7/6/2016 Sr-90 12.3 +/- 1.3 11.4 6.8 - 16.0 Pass SPAP-3365 7/7/2016 Gr. Beta 39.7 +/- 0.1 42.2 25.3 - 59.0 Pass SPAP-3367 7/7/2016 Cs-134 1.2 +/- 0.7 1.2 0.7 - 1.7 Pass SPAP-3367 7/7/2016 Cs-137 94.4 +/- 2.8 94.0 56.4 - 131.6 Pass SPW-3370 7/7/2016 C-14 4,444 +/- 17 4,735 2,841 - 6,629 Pass SPW-3373 7/7/2016 Ni-63 446 +/-5 401 241 - 561 Pass SPW-3375 7/7/2016 Tc-99 545 +/-9 539 324 - 755 Pass SPW-3519 7/14/2016 H-3 8,621 +/- 279 8650 5,190 - 12,110 Pass SPW-3688 6/29/2016 Ra-226 17.5 +/- 0.4 16.7 10.0 - 23.4 Pass SPW-3711 7/20/2016 H-3 44,368 +/- 612 43,766 26,260 - 61,273 Pass SPW-3774 7/22/2016 H-3 45,259 +/- 619 43,766 26,260 - 61,273 Pass SPW-3776 7/22/2016 Gr. Alpha 23.3 +/- 0.5 20.1 12.0 - 28.1 Pass SPW-3776 7/22/2016 Gr. Beta 27.5 +/- 0.3 28.9 17.3 - 40.4 Pass SPW-3884 7/26/2016 H-3 45,850 +/- 623 43,766 26,260 - 61,273 Pass SPW-3950 7/28/2016 Ra-228 17.8 +/- 1.8 16.7 10 - 23 Pass SPW-3982 7/29/2016 H-3 45,273 +/- 619 43,766 26,260 - 61,273 Pass W-073016 4/29/2016 Cs-134 36.5 +/- 6.1 36.2 21.7 - 50.6 Pass W-073016 4/29/2016 Cs-137 80.6 +/- 7.5 71.9 43.1 - 100.6 Pass SPW-4134 8/4/2016 Ra-228 5.5 +/- 0.8 6.7 4.0 - 9.3 Pass SPW-4340 8/17/2016 Ra-228 19.9 +/- 2.0 16.7 10.0 - 23.4 Pass SPW-4386 7/15/2016 Ra-226 18.0 +/- 0.4 16.7 10.0 - 23.4 Pass W-082716 4/29/2016 Ra-228 32.5 +/- 5.2 36.2 21.7 - 50.6 Pass W-082716 4/29/2016 Ra-226 78.5 +/- 8.3 71.9 43.1 - 100.6 Pass SPW-4642 9/6/2016 U-238 45.8 +/- 2.5 41.7 25.0 - 58.4 Pass SPW-4999 9/26/2016 Sr-90 35.1 +/- 2.2 36.8 22.1 - 51.5 Pass SPW-5091 9/12/2016 Ra-226 18.2 +/- 0.4 16.7 10.0 - 23.4 Pass W-092716 4/29/2016 Cs-134 37.3 +/- 11.8 36.2 21.7 - 50.6 Pass W-092716 4/29/2016 Cs-137 78.3 +/- 11.2 71.9 43.1 - 100.6 Pass SPW-5165 9/30/2016 Gr. Alpha 22.2 +/- 0.4 20.1 12.0 - 28.1 Pass SPW-5165 9/30/2016 Gr. Beta 27.2 +/- 0.3 28.9 17.3 - 40.4 Pass SPW-5426 9/28/2016 Ra-226 18.2 +/- 0.4 16.7 10.0 - 23.4 Pass SPW-5510 10/18/2016 H-3 44,398 +/- 618 43,766 26,260 - 61273 Pass SPW-5553 10/19/2016 U-238 50.0 +/- 2.6 41.7 25.0 - 58.4 Pass SPW-5555 10/19/2016 Ra-228 17.4 +/- 1.9 16.7 10.0 - 23.4 Pass SPW-5612 10/20/2016 H-3 44,681 +/- 622 43,766 26,260 - 61,273 Pass SPW-5741 10/25/2016 H-3 44,946 +/- 624 43,766 26,260 - 61,273 Pass SPU-5833 10/26/2016 H-3 10,018 +/- 946 8,622 5,173 - 12,071 Pass SPW-5862 10/28/2016 H-3 18,061 +/- 374 17,244 10,346 - 24,141 Pass W-103116 4/29/2016 Cs-134 36.0 +/- 4.6 36.2 21.7 - 50.6 Pass W-103116 4/29/2016 Cs-137 81.1 +/- 7.3 71.9 43.1 - 100.6 Pass A3-2

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

Lab Code Date Analysis Laboratory results Known Control 2s, n=1 c Activity Limits d Acceptance SPW-5984 11/2/2016 H-3 17,727 +/- 399 17,244 10,346 - 24,141 Pass SPW-6008 11/4/2016 H-3 17,854 +/- 402 17,244 10,346 - 24,141 Pass SPW-6124 11/8/2016 Ra-228 14.4 +/- 1.9 16.0 9.6 - 22.4 Pass SPW-6132 11/9/2016 H-3 18,135 +/- 374 17,243 10,346 - 24,140 Pass SPW-6135 10/12/2016 Ra-226 18.9 +/- 0.4 16.7 10.0 - 23.4 Pass SPW-6146 11/10/2016 H-3 17,488 +/- 398 17,243 10,346 - 24,140 Pass SPW-6222 11/12/2016 H-3 17,787 +/- 408 17,243 10,346 - 24,140 Pass SPW-6318 11/16/2016 H-3 17,379 +/- 408 17,243 10,346 - 24,140 Pass SPW-6349 11/17/2016 H-3 17,893 +/- 371 17,243 10,346 - 24,140 Pass SPW-6424 11/19/2016 H-3 18,258 +/- 379 17,243 10,346 - 24,140 Pass W-112616 4/29/2016 Cs-134 35.0 +/- 6.0 36.2 21.7 - 50.6 Pass W-112616 4/29/2016 Cs-137 75.0 +/- 7.1 71.9 43.1 - 100.6 Pass SPW-6456 11/28/2016 Sr-90 41.9 +/- 2.5 36.8 22.1 - 51.5 Pass SPW-6486 11/30/2016 Sr-90 35.6 +/- 2.2 36.6 21.9 - 51.2 Pass SPW-6490 11/29/2016 Ra-226 18.8 +/- 0.4 16.7 10.0 - 23.4 Pass SPW-6519 11/30/2016 Ni-63 438 +/-4 400 240 - 560 Pass SPW-6527 12/1/2016 U-238 49.5 +/- 2.5 41.7 25.0 - 58.4 Pass SPW-6616 12/3/2016 H-3 18,018 +/- 374 17,243 10,346 - 24,140 Pass SPW-6669 12/5/2016 H-3 18,237 +/- 377 17,243 10,346 - 24,140 Pass SPW-6735 12/9/2016 H-3 17,939 +/- 396 17,243 10,346 - 24,140 Pass SPW-6880 12/21/2016 H-3 17,835 +/- 396 17,243 10,346 - 24,140 Pass SPW-6947 12/22/2016 Ni-63 450 +/-4 400 240 - 560 Pass W-122316 4/29/2016 Cs-134 36.0 +/- 2.2 36.2 21.7 - 50.6 Pass W-122316 4/29/2016 Cs-134 76.1 +/- 2.9 71.9 43.1 - 100.6 Pass SPW-6948 12/30/2016 H-3 17,999 +/- 398 17,243 10,346 - 24,140 Pass SPW-6974 12/29/2016 Ra-226 17.6 +/- 0.4 16.7 10.0 - 23.4 Pass 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 established from the precision values listed in Attachment A of this report, adjusted to +/- 2s.

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

A3-3

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-289 Water 1/21/2016 Sr-90 0.55 0.28 +/- 0.29 1 SPW-291 Water 1/21/2016 Sr-90 0.61 0.15 +/- 0.30 1 SPW-293 Water 1/21/2016 C-14 147 -12 +/- 89 200 SPW-413 Water 2/1/2016 Ra-228 0.86 1.86 +/- 0.60 2 W-020416 Water 2/4/2016 Gr. Alpha 0.43 -0.17 +/- 0.28 2 W-020416 Water 2/4/2016 Gr. Beta 0.73 0.36 +/- 0.53 4 W-020916 Water 2/9/2016 Ra-226 0.02 0.01 +/- 0.01 2 W-030716 Water 3/7/2016 Gr. Alpha 0.90 -0.36 +/- 0.32 2 W-030716 Water 3/7/2016 Gr. Beta 1.59 -0.62 +/- 0.71 4 SPDW-70045 Water 3/29/2016 Ra-226 0.03 0.01 +/- 0.02 2 SPDW-1234 Water 3/30/2016 Gr. Alpha 0.44 -0.05 +/- 0.30 2 SPDW-1234 Water 3/30/2016 Gr. Beta 0.79 -0.54 +/- 0.54 4 SPW-1738 Water 4/21/2016 Ra-228 1.05 0.13 +/- 0.50 2 SPW-1822 Water 4/23/2016 Gr. Alpha 0.50 -0.18 +/- 0.33 2 SPW-1822 Water 4/23/2016 Gr. Beta 0.08 -0.35 +/- 0.51 4 SPW-2051 Water 4/12/2016 Ra-226 0.02 0.03 +/- 0.02 2 SPW-2069 Water 5/3/2016 I-131 0.15 0.06 +/- 0.09 1 SPW-2133 Water 5/4/2016 H-3 148 55 +/- 76 200 SPW-2230 Water 5/7/2016 H-3 149 -11 +/- 73 200 SPW-2314 Water 5/13/2016 H-3 150 -29 +/- 72 200 SPW-2342 Water 5/13/2016 H-3 143 50 +/- 74 200 SPW-2364 Water 5/13/2016 I-131 0.22 -0.03 +/- 0.12 1 SPW-2375 Water 5/14/2016 H-3 146 1 +/- 70 200 SPW-2410 Water 5/17/2016 Sr-90 0.59 0.10 +/- 0.29 1 SPW-2454 Water 5/19/2016 Gr. Alpha 0.47 -0.21 +/- 0.31 2 SPW-2454 Water 5/19/2016 Gr. Beta 0.77 -0.49 +/- 0.52 4 SPW-2456 Water 5/19/2016 U-238 0.15 0.00 +/- 0.09 1 SPW-2485 Water 5/20/2016 I-131 0.18 -0.01 +/- 0.10 1 SPW-2505 Water 5/20/2016 H-3 144 64 +/- 75 200 SPW-2529 Water 5/23/2016 H-3 152 -3 +/- 75 200 SPW-2530 Water 5/23/2016 Ra-228 0.96 -0.12 +/- 0.43 2 SPW-2565 Water 5/24/2016 Gr. Alpha 0.47 0.03 +/- 0.33 2 SPW-2565 Water 5/24/2016 Gr. Beta 0.77 -0.23 +/- 0.53 4 SPW-2703 Water 6/1/2016 Sr-89 0.68 -0.13 +/- 0.50 5 SPW-2703 Water 6/1/2016 Sr-90 0.55 0.11 +/- 0.27 1 SPW-2718 Water 6/2/2016 Ra-228 0.67 0.23 +/- 0.34 2 SPW-2720 Water 6/2/2016 I-131 0.16 0.01 +/- 0.09 1 SPW-2750 Water 6/3/2016 H-3 151 -31 +/- 73 200 SPW-2844 Water 6/7/2016 H-3 148 -55 +/- 75 200 SPMI-2959 Milk 6/14/2016 I-131 0.16 0.09 +/- 0.10 1 SPW-3137 Water 6/23/2016 I-131 0.15 -0.03 +/- 0.08 1 SPW-3226 Water 6/17/2016 Ra-226 0.02 -0.01 +/- 0.04 2 SPW-3239 Water 6/28/2016 Gr. Alpha 0.40 -0.15 +/- 0.26 2 SPW-3239 Water 6/28/2016 Gr. Beta 0.73 0.14 +/- 0.52 4 SPW-3687 Water 6/29/2016 Ra-226 0.04 0.03 +/- 0.03 2 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-3312 Water 7/1/2016 Ra-228 0.67 0.35 +/- 0.35 2 SPW-3327 Water 7/6/2016 Sr-89 0.67 0.51 +/- 0.51 5 SPW-3327 Water 7/6/2016 Sr-90 0.60 -0.14 +/- 0.26 1 SPAP-3364 AP 7/7/2016 Gr.Beta 0.002 0.005 +/- 0.001 0.01 SPW-3370 Water 7/7/2016 C-14 115 49 +/- 71 200 SPW-3372 Water 7/7/2016 Ni-63 122 115 +/- 76 200 SPW-3374 Water 7/7/2016 Tc-99 6.07 1.00 +/- 3.70 10 SPW-3710 Water 7/20/2016 H-3 147 35 +/- 75 200 SPW-3775 Water 7/22/2016 Gr. Alpha 0.73 0.41 +/- 0.53 2 SPW-3775 Water 7/22/2016 Gr. Beta 0.45 -0.14 +/- 0.30 4 SPW-3884 Water 7/26/2016 H-3 151 -1 +/- 73 200 SPW-3949 Water 7/28/2016 Ra-228 0.76 0.32 +/- 0.39 2 SPW-3982 Water 7/29/2016 H-3 145 49 +/- 75 200 SPW-4133 Water 8/4/2016 Ra-228 0.80 0.26 +/- 0.40 2 SPW-4257 Water 8/11/2016 I-131 0.17 -0.01 +/- 0.10 1 SPW-4339 Water 8/17/2016 Ra-228 0.73 0.36 +/- 0.39 2 SPW-4385 Water 7/15/2016 Ra-226 0.09 0.75 +/- 0.09 2 SPW-4641 Water 9/6/2016 U-238 0.21 0.00 +/- 0.13 1 SPW-4684 Water 9/8/2016 H-3 151 48 +/- 78 200 SPW-4872 Water 9/16/2016 I-131 0.21 0.05 +/- 0.11 1 SPW-4998 Water 9/26/2016 Sr-89 0.54 0.06 +/- 0.39 5 SPW-4998 Water 9/26/2016 Sr-90 0.53 -0.03 +/- 0.24 1 SPW-5090 Water 8/19/2016 Ra-226 0.03 0.03 +/- 0.02 2 SPW-5164 Water 9/30/2016 Gr. Alpha 0.46 -0.05 +/- 0.32 2 SPW-5164 Water 9/30/2016 Gr. Beta 0.74 -0.02 +/- 0.52 4 SPW-5425 Water 9/28/2016 Ra-226 0.02 0.07 +/- 0.05 2 SPW-5323 Water 10/7/2016 H-3 157 -12 +/- 75 200 SPW-5552 Water 10/19/2016 U-238 0.18 0.00 +/- 0.11 1 SPW-5554 Water 10/19/2016 Ra-228 0.72 0.22 +/- 0.36 2 SPW-5611 Water 10/20/2016 H-3 153 67 +/- 80 200 SPW-5613 Water 10/21/2016 Gr. Alpha 0.76 -0.55 +/- 0.51 2 SPW-5613 Water 10/21/2016 Gr. Beta 0.42 0.02 +/- 0.29 4 SPW-5740 Water 10/25/2016 H-3 154 -2 +/- 72 200 SPW-5743 Water 10/25/2016 Sr-90 1.26 0.72 +/- 0.67 1 SPW-5861 Water 10/28/2016 H-3 179 129 +/- 91 200 SPW-5983 Water 11/2/2016 H-3 156 8 +/- 78 200 SPW-6007 Water 11/4/2016 H-3 156 -34 +/- 73 200 SPW-6131 Water 11/9/2016 H-3 180 80 +/- 92 200 SPW-6134 Water 10/12/2016 Ra-226 0.05 -0.02 +/- 0.12 2 SPW-6145 Water 11/10/2016 H-3 171 -46 +/- 80 200 SPW-6317 Water 11/16/2016 H-3 180 -43 +/- 82 200 SPW-6348 Water 11/17/2016 H-3 182 -45 +/- 88 200 SPW-6423 Water 11/19/2016 H-3 181 8 +/- 95 200 SPW-6455 Water 11/28/2016 Sr-89 0.58 -0.15 +/- 0.46 5 SPW-6455 Water 11/28/2016 Sr-90 0.67 0.09 +/- 0.32 1 SPW-6489 Water 11/29/2016 Ra-226 0.03 0.03 +/- 0.02 2 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-6529 Water 12/1/2016 I-131 0.18 -0.03 +/- 0.10 1 SPW-6616 Water 12/3/2016 H-3 180 72 +/- 92 200 SPW-6670 Water 12/5/2016 H-3 174 28 +/- 92 200 SPW-6735 Water 12/9/2016 H-3 152 2 +/- 73 200 SPW-6792 Water 12/15/2016 I-131 0.17 0.03 +/- 0.12 1 SPW-6819 Water 12/16/2016 H-3 158 14 +/- 77 200 SPW-6879 Water 12/21/2016 H-3 147 80 +/- 75 200 SPW-6947 Water 12/22/2016 Ni-63 93 26 +/- 57 200 SPW-6973 Water 12/29/2016 Ra-226 0.03 0.03 +/- 0.02 2 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-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-010416 1/4/2016 Gr. Beta 0.044 +/- 0.006 0.051 +/- 0.006 0.047 +/- 0.004 Pass SPS-62, 63 1/7/2016 K-40 21.1 +/- 1.9 21.2 +/- 2.1 21.2 +/- 1.4 Pass WW-125, 126 1/7/2016 H-3 659 +/- 102 748 +/- 106 703 +/- 74 Pass SPS-199, 200 1/7/2016 Cs-137 0.09 +/- 0.02 0.08 +/- 0.03 0.08 +/- 0.02 Pass SPS-199, 200 1/7/2016 K-40 7.60 +/- 0.60 8.62 +/- 0.62 8.11 +/- 0.43 Pass AP-011116 1/11/2016 Gr. Beta 0.024 +/- 0.005 0.027 +/- 0.005 0.026 +/- 0.003 Pass AP-011216 1/12/2016 Gr. Beta 0.030 +/- 0.004 0.034 +/- 0.004 0.032 +/- 0.003 Pass WW-262, 263 1/14/2016 H-3 153 +/- 78 141 +/- 78 147 +/- 55 Pass WW-346, 347 1/14/2016 H-3 1,036 +/- 117 959 +/- 115 997 +/- 82 Pass WW-283, 284 1/18/2016 H-3 437 +/- 92 427 +/- 91 432 +/- 65 Pass AP-011916 1/19/2016 Gr. Beta 0.042 +/- 0.005 0.037 +/- 0.004 0.040 +/- 0.003 Pass AP-012016 1/20/2016 Gr. Beta 0.023 +/- 0.003 0.030 +/- 0.004 0.027 +/- 0.002 Pass AP-020116 2/1/2016 Gr. Beta 0.023 +/- 0.005 0.023 +/- 0.005 0.023 +/- 0.004 Pass SWU-472, 473 2/2/2016 Gr. Beta 4.37 +/- 0.47 4.60 +/- 0.49 4.49 +/- 0.34 Pass SG-493, 494 2/6/2016 Ac-228 2.10 +/- 0.20 2.13 +/- 0.20 2.12 +/- 0.14 Pass SG-493, 494 2/6/2016 K-40 5.79 +/- 0.57 5.50 +/- 0.69 5.65 +/- 0.45 Pass SG-493, 494 2/6/2016 Pb-214 1.84 +/- 0.11 1.91 +/- 0.11 1.88 +/- 0.08 Pass AP-020816 2/8/2016 Gr. Beta 0.020 +/- 0.004 0.019 +/- 0.004 0.020 +/- 0.003 Pass AP-020916 2/9/2016 Be-7 0.032 +/- 0.005 0.041 +/- 0.006 0.036 +/- 0.004 Pass SPS-619, 620 2/18/2016 K-40 20.0 +/- 1.8 19.1 +/- 1.6 19.5 +/- 1.2 Pass WW-640, 641 2/18/2016 H-3 90.1 +/- 75.0 153.6 +/- 78.4 121.8 +/- 54.2 Pass AP-021916 2/19/2016 Gr. Beta 0.021 +/- 0.003 0.025 +/- 0.004 0.023 +/- 0.002 Pass WW-822, 823 2/26/2016 H-3 2,770 +/- 173 2,974 +/- 178 2,872 +/- 124 Pass DW-70010, 70011 2/29/2016 Ra-226 4.88 +/- 0.29 4.93 +/- 0.28 4.91 +/- 0.20 Pass DW-70010, 70011 2/29/2016 Ra-228 3.00 +/- 0.77 1.90 +/- 0.62 2.45 +/- 0.49 Pass SW-934, 935 3/1/2016 Gr. Beta 0.94 +/- 0.52 1.36 +/- 0.60 1.15 +/- 0.40 Pass SPS-913, 914 3/3/2016 Cs-137 0.08 +/- 0.03 0.10 +/- 0.03 0.09 +/- 0.02 Pass SPS-913, 914 3/3/2016 K-40 17.45 +/- 0.94 16.83 +/- 0.95 17.14 +/- 0.67 Pass SPS-913, 914 3/3/2016 Ra-226 1.02 +/- 0.08 1.13 +/- 0.17 1.07 +/- 0.09 Pass SPS-913, 914 3/3/2016 Ra-228 1.09 +/- 0.15 1.13 +/- 0.17 1.11 +/- 0.11 Pass AP-030716 3/7/2016 Gr. Beta 0.018 +/- 0.005 0.021 +/- 0.005 0.019 +/- 0.003 Pass F-1303,1304 3/7/2016 K-40 3.320 +/- 0.475 3.508 +/- 0.396 3.414 +/- 0.309 Pass SG-976, 977 3/8/2016 Ra-226 6.75 +/- 0.25 6.28 +/- 0.22 6.52 +/- 0.17 Pass SG-976, 977 3/8/2016 Ra-228 9.21 +/- 0.49 9.09 +/- 0.49 9.15 +/- 0.35 Pass PM-1094, 1095 3/9/2016 K-40 14.01 +/- 0.68 14.47 +/- 0.72 14.24 +/- 0.49 Pass MI-1042,1043 3/7/2016 K-40 1,684 +/- 124 1,804 +/- 119 1,744 +/- 86 Pass DW-70023, 70024 3/7/2016 Ra-226 3.40 +/- 0.43 2.68 +/- 0.35 3.04 +/- 0.28 Pass DW-70023, 70024 3/7/2016 Ra-228 4.46 +/- 0.83 5.74 +/- 0.94 5.10 +/- 0.63 Pass DW-70014, 70015 3/7/2016 Gr. Alpha 13.38 +/- 1.58 11.40 +/- 1.43 12.39 +/- 1.07 Pass DW-70026, 70027 3/7/2016 Gr. Alpha 3.46 +/- 0.79 3.08 +/- 0.74 3.27 +/- 0.54 Pass DW-70038, 70039 3/8/2016 Gr. Alpha 1.14 +/- 0.89 1.73 +/- 0.95 1.44 +/- 0.65 Pass DW-70035, 70036 3/8/2016 Ra-226 0.47 +/- 0.10 0.45 +/- 0.09 0.46 +/- 0.07 Pass DW-70035, 70036 3/8/2016 Ra-228 0.56 +/- 0.45 0.47 +/- 0.44 0.52 +/- 0.31 Pass AP-031516 3/15/2016 Gr. Beta 0.014 +/- 0.003 0.016 +/- 0.004 0.015 +/- 0.002 Pass AP-032116 3/21/2016 Gr. Beta 0.014 +/- 0.004 0.020 +/- 0.004 0.017 +/- 0.003 Pass AP-1218,1219 3/24/2016 Be-7 0.135 +/- 0.065 0.167 +/- 0.081 0.151 +/- 0.052 Pass AP-1719,1720 3/28/2016 Be-7 0.075 +/- 0.008 0.076 +/- 0.007 0.076 +/- 0.005 Pass AP-033016 3/30/2016 Gr. Beta 0.023 +/- 0.004 0.025 +/- 0.004 0.024 +/- 0.003 Pass SPS-1260, 1261 3/30/2016 K-40 18.00 +/- 1.92 19.67 +/- 1.77 18.84 +/- 1.30 Pass XW-1467, 1468 3/30/2016 H-3 310 +/- 87 295 +/- 86 303 +/- 61 Pass XWW-1530, 1531 3/30/2016 H-3 198 +/- 84 162 +/- 82 180 +/- 59 Pass AP-1827, 1828 3/30/2016 Be-7 0.069 +/- 0.011 0.072 +/- 0.011 0.071 +/- 0.008 Pass AP-1323,1324 3/31/2016 Be-7 0.206 +/- 0.120 0.197 +/- 0.091 0.202 +/- 0.076 Pass LW-1446,1447 3/31/2016 Gr. Beta 2.36 +/- 0.93 2.23 +/- 1.01 2.29 +/- 0.69 Pass A5-1

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-010416 1/4/2016 Gr. Beta 0.044 +/- 0.006 0.051 +/- 0.006 0.047 +/- 0.004 Pass SPS-62, 63 1/7/2016 K-40 21.1 +/- 1.9 21.2 +/- 2.1 21.2 +/- 1.4 Pass WW-125, 126 1/7/2016 H-3 659 +/- 102 748 +/- 106 703 +/- 74 Pass SPS-199, 200 1/7/2016 Cs-137 0.09 +/- 0.02 0.08 +/- 0.03 0.08 +/- 0.02 Pass SPS-199, 200 1/7/2016 K-40 7.60 +/- 0.60 8.62 +/- 0.62 8.11 +/- 0.43 Pass AP-011116 1/11/2016 Gr. Beta 0.024 +/- 0.005 0.027 +/- 0.005 0.026 +/- 0.003 Pass AP-011216 1/12/2016 Gr. Beta 0.030 +/- 0.004 0.034 +/- 0.004 0.032 +/- 0.003 Pass WW-262, 263 1/14/2016 H-3 153 +/- 78 141 +/- 78 147 +/- 55 Pass WW-346, 347 1/14/2016 H-3 1,036 +/- 117 959 +/- 115 997 +/- 82 Pass WW-283, 284 1/18/2016 H-3 437 +/- 92 427 +/- 91 432 +/- 65 Pass AP-011916 1/19/2016 Gr. Beta 0.042 +/- 0.005 0.037 +/- 0.004 0.040 +/- 0.003 Pass AP-012016 1/20/2016 Gr. Beta 0.023 +/- 0.003 0.030 +/- 0.004 0.027 +/- 0.002 Pass AP-020116 2/1/2016 Gr. Beta 0.023 +/- 0.005 0.023 +/- 0.005 0.023 +/- 0.004 Pass SWU-472, 473 2/2/2016 Gr. Beta 4.37 +/- 0.47 4.60 +/- 0.49 4.49 +/- 0.34 Pass SG-493, 494 2/6/2016 Ac-228 2.10 +/- 0.20 2.13 +/- 0.20 2.12 +/- 0.14 Pass SG-493, 494 2/6/2016 K-40 5.79 +/- 0.57 5.50 +/- 0.69 5.65 +/- 0.45 Pass SG-493, 494 2/6/2016 Pb-214 1.84 +/- 0.11 1.91 +/- 0.11 1.88 +/- 0.08 Pass AP-020816 2/8/2016 Gr. Beta 0.020 +/- 0.004 0.019 +/- 0.004 0.020 +/- 0.003 Pass AP-020916 2/9/2016 Be-7 0.032 +/- 0.005 0.041 +/- 0.006 0.036 +/- 0.004 Pass SPS-619, 620 2/18/2016 K-40 20.0 +/- 1.8 19.1 +/- 1.6 19.5 +/- 1.2 Pass WW-640, 641 2/18/2016 H-3 90.1 +/- 75.0 153.6 +/- 78.4 121.8 +/- 54.2 Pass AP-021916 2/19/2016 Gr. Beta 0.021 +/- 0.003 0.025 +/- 0.004 0.023 +/- 0.002 Pass WW-822, 823 2/26/2016 H-3 2,770 +/- 173 2,974 +/- 178 2,872 +/- 124 Pass DW-70010, 70011 2/29/2016 Ra-226 4.88 +/- 0.29 4.93 +/- 0.28 4.91 +/- 0.20 Pass DW-70010, 70011 2/29/2016 Ra-228 3.00 +/- 0.77 1.90 +/- 0.62 2.45 +/- 0.49 Pass SW-934, 935 3/1/2016 Gr. Beta 0.94 +/- 0.52 1.36 +/- 0.60 1.15 +/- 0.40 Pass SPS-913, 914 3/3/2016 Cs-137 0.08 +/- 0.03 0.10 +/- 0.03 0.09 +/- 0.02 Pass SPS-913, 914 3/3/2016 K-40 17.45 +/- 0.94 16.83 +/- 0.95 17.14 +/- 0.67 Pass SPS-913, 914 3/3/2016 Ra-226 1.02 +/- 0.08 1.13 +/- 0.17 1.07 +/- 0.09 Pass SPS-913, 914 3/3/2016 Ra-228 1.09 +/- 0.15 1.13 +/- 0.17 1.11 +/- 0.11 Pass AP-030716 3/7/2016 Gr. Beta 0.018 +/- 0.005 0.021 +/- 0.005 0.019 +/- 0.003 Pass F-1303,1304 3/7/2016 K-40 3.320 +/- 0.475 3.508 +/- 0.396 3.414 +/- 0.309 Pass SG-976, 977 3/8/2016 Ra-226 6.75 +/- 0.25 6.28 +/- 0.22 6.52 +/- 0.17 Pass SG-976, 977 3/8/2016 Ra-228 9.21 +/- 0.49 9.09 +/- 0.49 9.15 +/- 0.35 Pass PM-1094, 1095 3/9/2016 K-40 14.01 +/- 0.68 14.47 +/- 0.72 14.24 +/- 0.49 Pass MI-1042,1043 3/7/2016 K-40 1,684 +/- 124 1,804 +/- 119 1,744 +/- 86 Pass DW-70023, 70024 3/7/2016 Ra-226 3.40 +/- 0.43 2.68 +/- 0.35 3.04 +/- 0.28 Pass DW-70023, 70024 3/7/2016 Ra-228 4.46 +/- 0.83 5.74 +/- 0.94 5.10 +/- 0.63 Pass DW-70014, 70015 3/7/2016 Gr. Alpha 13.38 +/- 1.58 11.40 +/- 1.43 12.39 +/- 1.07 Pass DW-70026, 70027 3/7/2016 Gr. Alpha 3.46 +/- 0.79 3.08 +/- 0.74 3.27 +/- 0.54 Pass DW-70038, 70039 3/8/2016 Gr. Alpha 1.14 +/- 0.89 1.73 +/- 0.95 1.44 +/- 0.65 Pass DW-70035, 70036 3/8/2016 Ra-226 0.47 +/- 0.10 0.45 +/- 0.09 0.46 +/- 0.07 Pass DW-70035, 70036 3/8/2016 Ra-228 0.56 +/- 0.45 0.47 +/- 0.44 0.52 +/- 0.31 Pass AP-031516 3/15/2016 Gr. Beta 0.014 +/- 0.003 0.016 +/- 0.004 0.015 +/- 0.002 Pass AP-032116 3/21/2016 Gr. Beta 0.014 +/- 0.004 0.020 +/- 0.004 0.017 +/- 0.003 Pass AP-1218,1219 3/24/2016 Be-7 0.135 +/- 0.065 0.167 +/- 0.081 0.151 +/- 0.052 Pass AP-1719,1720 3/28/2016 Be-7 0.075 +/- 0.008 0.076 +/- 0.007 0.076 +/- 0.005 Pass AP-033016 3/30/2016 Gr. Beta 0.023 +/- 0.004 0.025 +/- 0.004 0.024 +/- 0.003 Pass SPS-1260, 1261 3/30/2016 K-40 18.00 +/- 1.92 19.67 +/- 1.77 18.84 +/- 1.30 Pass XW-1467, 1468 3/30/2016 H-3 310 +/- 87 295 +/- 86 303 +/- 61 Pass XWW-1530, 1531 3/30/2016 H-3 198 +/- 84 162 +/- 82 180 +/- 59 Pass AP-1827, 1828 3/30/2016 Be-7 0.069 +/- 0.011 0.072 +/- 0.011 0.071 +/- 0.008 Pass AP-1323,1324 3/31/2016 Be-7 0.206 +/- 0.120 0.197 +/- 0.091 0.202 +/- 0.076 Pass LW-1446,1447 3/31/2016 Gr. Beta 2.36 +/- 0.93 2.23 +/- 1.01 2.29 +/- 0.69 Pass A5-2

TABLE A-5. In-House "Duplicate" Samples a

Concentration Averaged Lab Code Date Analysis First Result Second Result Result Acceptance WW-1740,1741 4/2/2016 H-3 21,162 +/- 120 21,091 +/- 427 21,126 +/- 222 Pass SPS-1344, 1345 4/4/2016 K-40 17.98 +/- 0.93 17.14 +/- 0.96 17.56 +/- 0.67 Pass SPS-1344, 1345 4/4/2016 Pb-214 1.12 +/- 0.09 1.04 +/- 0.08 1.08 +/- 0.06 Pass SPS-1344, 1345 4/4/2016 Ac-228 1.23 +/- 0.15 1.33 +/- 0.19 1.28 +/- 0.12 Pass SPS-1344, 1345 4/4/2016 Cs-137 0.13 +/- 0.03 0.13 +/- 0.03 0.13 +/- 0.02 Pass P-1509,1510 4/8/2016 H-3 1,084 +/- 120 1,038 +/- 119 1,061 +/- 85 Pass AP-041116 4/11/2016 Gr. Beta 0.020 +/- 0.004 0.019 +/- 0.004 0.019 +/- 0.003 Pass SS-1551,1552 4/12/2016 Gr. Beta 8.71 +/- 1.11 8.88 +/- 1.13 8.80 +/- 0.79 Pass SS-1551,1552 4/12/2016 K-40 3.50 +/- 0.25 3.06 +/- 0.28 3.28 +/- 0.19 Pass SS-1551,1552 4/12/2016 Tl-208 0.05 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 Pass SS-1551,1552 4/12/2016 Bi-214 0.10 +/- 0.02 0.09 +/- 0.02 0.10 +/- 0.02 Pass SS-1551,1552 4/12/2016 Pb-212 0.13 +/- 0.02 0.11 +/- 0.02 0.12 +/- 0.01 Pass SS-1551,1552 4/12/2016 Ra-226 0.35 +/- 0.17 0.30 +/- 0.17 0.32 +/- 0.12 Pass SS-1551,1552 4/12/2016 Ac-228 0.16 +/- 0.05 0.17 +/- 0.05 0.17 +/- 0.04 Pass SS-1593,1594 4/12/2016 K-40 14.80 +/- 0.73 14.89 +/- 0.78 14.85 +/- 0.53 Pass WW-1677, 1678 4/14/2016 Ra-226 0.23 +/- 0.13 0.35 +/- 0.15 0.29 +/- 0.10 Pass WW-1783,1784 4/14/2016 H-3 768 +/- 111 632 +/- 107 700 +/- 77 Pass BS-1804,1805 4/18/2016 K-40 0.79 +/- 0.02 0.87 +/- 0.19 0.83 +/- 0.10 Pass WW-2021,2022 4/18/2016 H-3 5,548 +/- 221 5,707 +/- 224 5,627 +/- 157 Pass XWW-2240, 2241 4/18/2016 H-3 638 +/- 104 543 +/- 101 591 +/- 72 Pass XWW-2109, 2110 4/19/2016 H-3 3461 +/- 185 3250 +/- 180 3356 +/- 129 Pass SPS-2130, 2131 4/25/2016 K-40 7.80 +/- 0.84 6.80 +/- 0.60 7.30 +/- 0.52 Pass AP-042516 4/25/2016 Gr. Beta 0.020 +/- 0.004 0.023 +/- 0.004 0.022 +/- 0.003 Pass BS-2065, 2066 4/25/2016 K-40 14.40 +/- 1.50 14.72 +/- 1.19 14.56 +/- 0.96 Pass AP-042716 4/27/2016 Gr. Beta 0.023 +/- 0.003 0.019 +/- 0.003 0.021 +/- 0.002 Pass SPS-1999, 2000 4/28/2016 K-40 19.84 +/- 1.76 18.963 +/- 2.42 19.40 +/- 1.50 Pass SO-2153,2154 5/2/2016 K-40 21.80 +/- 0.81 21.17 +/- 0.85 21.48 +/- 0.59 Pass SO-2153,2154 5/2/2016 Cs-137 0.11 +/- 0.03 0.11 +/- 0.07 0.11 +/- 0.04 Pass SO-2153,2154 5/2/2016 Ra-226 1.50 +/- 0.29 1.22 +/- 0.29 1.36 +/- 0.21 Pass SO-2153,2154 5/2/2016 Pb-214 0.56 +/- 0.06 0.57 +/- 0.06 0.57 +/- 0.04 Pass W-2394,2395 5/5/2016 H-3 736 +/- 106 631 +/- 102 683 +/- 74 Pass VE-2284,2285 5/9/2016 K-40 3.50 +/- 0.25 3.06 +/- 0.28 3.28 +/- 0.19 Pass AP-051016 5/10/2016 Gr. Beta 0.020 +/- 0.005 0.018 +/- 0.005 0.019 +/- 0.003 Pass SG-2261, 2262 5/10/2016 Ac-228 34.4 +/- 1.2 34.4 +/- 1.4 34.4 +/- 0.9 Pass SG-2261, 2262 5/10/2016 Pb-214 29.5 +/- 3.0 31.9 +/- 3.3 30.7 +/- 2.2 Pass BS-2439, 2440 5/12/2016 K-40 9.96 +/- 0.91 10.27 +/- 0.76 10.11 +/- 0.59 Pass WW-2534,2535 5/16/2016 H-3 14,342 +/- 354 14,613 +/- 357 14,477 +/- 252 Pass AP-051716 5/17/2016 Gr. Beta 0.014 +/- 0.004 0.015 +/- 0.004 0.014 +/- 0.003 Pass SPS-2945, 2946 5/19/2016 K-40 30.71 +/- 0.74 31.75 +/- 0.78 31.23 +/- 0.54 Pass SPS-2945, 2946 5/19/2016 Be-7 1.55 +/- 0.24 1.90 +/- 0.35 1.73 +/- 0.21 Pass SPS-2578, 2579 5/24/2016 Pb-214 0.96 +/- 0.12 0.80 +/- 0.14 0.88 +/- 0.09 Pass AP-052516 5/25/2016 Gr. Beta 0.022 +/- 0.004 0.022 +/- 0.004 0.022 +/- 0.003 Pass G-2642,2643 5/26/2016 Be-7 0.443 +/- 0.178 0.247 +/- 0.247 0.345 +/- 0.152 Pass SO-2663, 2664 5/26/2016 Cs-137 0.08 +/- 0.03 0.07 +/- 0.03 0.07 +/- 0.02 Pass SO-2663, 2664 5/26/2016 K-40 12.44 +/- 0.68 11.64 +/- 0.63 12.04 +/- 0.46 Pass SO-2663, 2664 5/26/2016 Tl-208 0.13 +/- 0.02 0.14 +/- 0.03 0.14 +/- 0.02 Pass SO-2663, 2664 5/26/2016 Pb-212 0.43 +/- 0.04 0.41 +/- 0.04 0.42 +/- 0.03 Pass SO-2663, 2664 5/26/2016 Ra-226 1.19 +/- 0.34 0.87 +/- 0.28 1.03 +/- 0.22 Pass SO-2663, 2664 5/26/2016 Ac-228 0.45 +/- 0.09 0.53 +/- 0.10 0.49 +/- 0.07 Pass SPS-2817, 2818 5/31/2016 K-40 12.10 +/- 0.70 11.05 +/- 0.70 11.58 +/- 0.49 Pass DW-70091, 70092 6/1/2016 Ra-226 5.61 +/- 0.29 5.53 +/- 0.30 5.57 +/- 0.21 Pass DW-70091, 70092 6/1/2016 Ra-228 1.45 +/- 0.58 1.91 +/- 0.62 1.68 +/- 0.42 Pass BS-2925,2926 6/3/2016 K-40 7.74 +/- 0.44 7.86 +/- 0.42 7.80 +/- 0.30 Pass SPS-2796, 2797 6/2/2016 K-40 20.91 +/- 2.38 21.16 +/- 1.82 21.04 +/- 1.50 Pass SPS-2882, 2883 6/7/2016 K-40 14.64 +/- 0.52 14.60 +/- 0.52 14.62 +/- 0.37 Pass SPS-2882, 2883 6/7/2016 Be-7 2.00 +/- 0.25 1.94 +/- 0.20 1.97 +/- 0.16 Pass DW-70102, 70103 6/13/2016 Ra-226 0.34 +/- 0.09 0.36 +/- 0.08 0.35 +/- 0.06 Pass A5-3

TABLE A-5. In-House "Duplicate" Samples a

Concentration Averaged Lab Code Date Analysis First Result Second Result Result Acceptance DW-70102, 70103 6/13/2016 Ra-228 0.93 +/- 0.47 1.11 +/- 0.53 1.02 +/- 0.35 Pass AP-061416 6/14/2016 Gr. Beta 0.026 +/- 0.004 0.023 +/- 0.004 0.024 +/- 0.003 Pass SG-3144, 3145 6/17/2016 Be-7 2.23 +/- 0.12 2.24 +/- 0.12 2.24 +/- 0.08 Pass SG-3144, 3145 6/17/2016 K-40 7.57 +/- 0.25 7.09 +/- 0.23 7.33 +/- 0.17 Pass SPS-3165, 3166 6/22/2016 K-40 21.14 +/- 2.27 22.88 +/- 1.60 22.01 +/- 1.39 Pass SPS-3323, 3324 6/24/2016 K-40 18.67 +/- 1.57 21.53 +/- 1.65 20.10 +/- 1.14 Pass WW-3231, 3232 6/27/2016 H-3 414 +/- 104 498 +/- 108 456 +/- 75 Pass AP-3830,3831 6/29/2016 Gr. Beta 0.088 +/- 0.012 0.093 +/- 0.015 0.091 +/- 0.010 Pass AP-070516A 7/5/2016 Gr. Beta 0.018 +/- 0.002 0.014 +/- 0.002 0.016 +/- 0.002 Pass AP-070516B 7/5/2016 Gr. Beta 0.025 +/- 0.005 0.026 +/- 0.005 0.025 +/- 0.004 Pass XWW-3605,3606 7/7/2016 H-3 3,316 +/- 186 3,316 +/- 181 3,316 +/- 130 Pass DW-70135,70136 7/8/2016 Gr. Alpha 3.68 +/- 1.01 2.76 +/- 0.98 3.22 +/- 0.70 Pass DW-70132,70133 7/8/2016 Ra-226 1.32 +/- 0.14 1.11 +/- 0.15 1.22 +/- 0.10 Pass DW-70132,70133 7/8/2016 Ra-228 3.92 +/- 0.94 2.94 +/- 0.90 3.43 +/- 0.65 Pass AP-071216 7/12/2016 Gr. Beta 0.014 +/- 0.004 0.018 +/- 0.004 0.016 +/- 0.003 Pass DW-70150,70151 7/14/2016 Gr. Alpha 5.00 +/- 1.06 4.43 +/- 1.04 4.72 +/- 0.74 Pass SPS-3649,3650 7/15/2016 Cs-137 0.12 +/- 0.03 0.12 +/- 0.03 0.12 +/- 0.02 Pass SPS-3649,3650 7/15/2016 K-40 16.68 +/- 0.79 16.52 +/- 0.86 16.6 +/- 0.58 Pass SPS-3649,3650 7/15/2016 Pb-214 1.20 +/- 0.08 1.17 +/- 0.08 1.19 +/- 0.06 Pass SPS-3649,3650 7/15/2016 Ac-228 1.28 +/- 0.16 1.28 +/- 0.16 1.28 +/- 0.11 Pass AP-071816 7/18/2016 Gr. Beta 0.022 +/- 0.005 0.024 +/- 0.005 0.023 +/- 0.003 Pass DW-70163,70164 7/19/2016 Gr. Alpha 1.08 +/- 0.66 1.36 +/- 0.70 1.22 +/- 0.48 Pass WW-3761,3762 7/20/2016 H-3 347 +/- 90 466 +/- 96 407 +/- 66 Pass SPS-4003,4004 7/23/2016 K-40 7.15 +/- 1.59 6.86 +/- 1.21 7.00 +/- 1.00 Pass AP-072516 7/25/2016 Gr. Beta 0.023 +/- 0.004 0.020 +/- 0.004 0.022 +/- 0.003 Pass VE-3936,3937 7/25/2016 Sr-90 0.048 +/- 0.007 0.058 +/- 0.010 0.053 +/- 0.006 Pass VE-3936,3937 7/25/2016 Be-7 0.49 +/- 0.15 0.51 +/- 0.15 0.50 +/- 0.10 Pass VE-3936,3937 7/25/2016 K-40 4.70 +/- 0.35 4.86 +/- 0.37 4.78 +/- 0.25 Pass VE-3959,3960 7/27/2016 Sr-90 0.002 +/- 0.002 0.003 +/- 0.001 0.003 +/- 0.001 Pass VE-3959,3960 7/27/2016 Be-7 0.30 +/- 0.14 0.25 +/- 0.12 0.27 +/- 0.09 Pass VE-3959,3960 7/27/2016 K-40 4.01 +/- 0.37 4.16 +/- 0.34 4.08 +/- 0.25 Pass DW-70169,70170 7/28/2016 Ra-226 0.83 +/- 0.11 0.69 +/- 0.11 0.76 +/- 0.08 Pass DW-70169,70170 7/28/2016 Ra-228 1.85 +/- 0.63 1.31 +/- 0.84 1.58 +/- 0.53 Pass AP-080116 8/1/2016 Gr. Beta 0.029 +/- 0.003 0.033 +/- 0.003 0.031 +/- 0.002 Pass SS-4131,4132 8/1/2016 K-40 12.47 +/- 0.71 13.24 +/- 0.81 12.86 +/- 0.54 Pass SS-4131,4132 8/1/2016 Cs-137 0.10 +/- 0.03 0.13 +/- 0.04 0.12 +/- 0.02 Pass SPS-4087,4088 8/2/2016 K-40 17.06 +/- 1.58 19.5 +/- 1.97 18.28 +/- 1.26 Pass WW-4976,4977 8/4/2016 H-3 17,043 +/- 390 16,821 +/- 388 16,932 +/- 275 Pass SPS-4266,4267 8/10/2016 K-40 1.06 +/- 0.47 1.69 +/- 0.52 1.375 +/- 0.35 Pass AP-081616 8/16/2016 Gr. Beta 0.029 +/- 0.005 0.025 +/- 0.004 0.027 +/- 0.003 Pass VE-4399,4400 8/18/2016 K-40 3.85 +/- 0.23 3.27 +/- 0.41 3.56 +/- 0.24 Pass VE-4399,4400 8/18/2016 Be-7 0.30 +/- 0.08 0.45 +/- 0.20 0.37 +/- 0.11 Pass WW-5394,5395 8/18/2016 H-3 947 +/- 122 846 +/- 119 896 +/- 85 Pass SPS-4441,4442 8/22/2016 K-40 20.55 +/- 2.23 19.69 +/- 1.74 20.12 +/- 1.41 Pass AP-082216 8/22/2016 Gr. Beta 0.021 +/- 0.005 0.015 +/- 0.005 0.018 +/- 0.003 Pass VE-4462,4463 8/22/2016 Be-7 0.91 +/- 0.09 0.89 +/- 0.11 0.90 +/- 0.07 Pass VE-4462,4463 8/22/2016 K-40 7.48 +/- 0.26 7.60 +/- 0.23 7.54 +/- 0.17 Pass WW-4594,4595 8/26/2016 H-3 675 +/- 107 788 +/- 111 731 +/- 77 Pass WW-4663,4664 8/26/2016 H-3 607 +/- 104 501 +/- 100 554 +/- 72 Pass SPS-4529,4530 8/26/2016 K-40 21.98 +/- 2.52 21.85 +/- 1.56 21.92 +/- 1.48 Pass AP-083016A 8/30/2016 Gr. Beta 0.030 +/- 0.003 0.035 +/- 0.004 0.033 +/- 0.002 Pass AP-083016B 8/30/2016 Gr. Beta 0.032 +/- 0.009 0.026 +/- 0.004 0.029 +/- 0.005 Pass VE-4615,4616 8/31/2016 K-40 2.96 +/- 0.16 3.11 +/- 0.17 3.03 +/- 0.11 Pass A5-4

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-110116 11/1/2016 Gr. Beta 0.021 +/- 0.004 0.024 +/- 0.004 0.023 +/- 0.003 Pass S-5963, 5964 11/1/2016 K-40 20.35 +/- 2.29 18.59 +/- 1.90 19.47 +/- 1.49 Pass SG-6119, 6120 11/1/2016 Ac-228 5.70 +/- 0.44 6.28 +/- 0.57 5.99 +/- 0.36 Pass SG-6119, 6120 11/1/2016 Gr. Alpha 21.59 +/- 1.88 24.35 +/- 1.93 22.97 +/- 1.35 Pass SG-6119, 6120 11/1/2016 K-40 4.89 +/- 1.10 5.90 +/- 1.08 5.40 +/- 0.77 Pass SG-6119, 6120 11/1/2016 Pb-214 3.99 +/- 0.21 4.35 +/- 0.32 4.17 +/- 0.19 Pass S-6051, 6052 11/4/2016 K-40 7.05 +/- 0.60 7.56 +/- 0.53 7.31 +/- 0.40 Pass WW-6297, 6298 11/8/2016 H-3 207 +/- 98 165 +/- 97 186 +/- 69 Pass WW-6341,6342 11/8/2016 H-3 1,356 +/- 140 1,404 +/- 141 1,380 +/- 99 Pass SO-6406,6407 11/9/2016 Cs-137 0.36 +/- 0.04 0.43 +/- 0.05 0.40 +/- 0.03 Pass SO-6406,6407 11/9/2016 K-40 10.90 +/- 0.68 11.29 +/- 0.74 11.09 +/- 0.50 Pass AP-111416 11/14/2016 Gr. Beta 0.024 +/- 0.005 0.021 +/- 0.006 0.022 +/- 0.004 Pass WW-6829,6830 11/15/2016 H-3 39,982 +/- 589 40,315 +/- 591 40,149 +/- 417 Pass DW-70239, 70240 11/17/2016 Gr. Alpha 7.99 +/- 1.15 6.41 +/- 1.05 7.20 +/- 0.78 Pass AP-112216 11/22/2016 Gr. Beta 0.049 +/- 0.005 0.045 +/- 0.005 0.047 +/- 0.003 Pass S-6473, 6474 11/24/2016 K-40 19.37 +/- 1.97 23.80 +/- 3.54 21.58 +/- 2.02 Pass SG-6938, 6939 11/28/2016 Ac-228 18.99 +/- 0.59 19.92 +/- 0.79 19.46 +/- 0.49 Pass SG-6938, 6939 11/28/2016 Pb-214 15.28 +/- 0.34 14.96 +/- 0.43 15.12 +/- 0.27 Pass AP-120116 12/1/2016 Gr. Beta 0.029 +/- 0.003 0.030 +/- 0.003 0.030 +/- 0.002 Pass F-6567,6568 12/1/2016 K-40 3.76 +/- 0.40 3.83 +/- 0.46 3.80 +/- 0.30 Pass S-6522, 6523 12/1/2016 Ac-228 1.08 +/- 0.13 1.29 +/- 0.16 1.19 +/- 0.10 Pass S-6522, 6523 12/1/2016 Pb-214 1.00 +/- 0.08 1.01 +/- 0.09 1.01 +/- 0.06 Pass S-6609, 6610 12/1/2016 K-40 15.57 +/- 1.01 15.99 +/- 0.78 15.78 +/- 0.64 Pass S-6718, 6719 12/7/2016 K-40 18.19 +/- 2.13 18.76 +/- 1.80 18.48 +/- 1.39 Pass WW-6784, 6785 12/7/2016 H-3 922 +/- 117 905 +/- 116 914 +/- 82 Pass AP-121216 12/12/2016 Gr. Beta 0.026 +/- 0.005 0.028 +/- 0.005 0.027 +/- 0.003 Pass AP-7178,7179 1/3/2017 Be-7 0.047 +/- 0.015 0.062 +/- 0.017 0.054 +/- 0.012 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 Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MASO-1053 2/1/2016 Ni-63 1,206 +/- 20 1250 875 - 1625 Pass MASO-1053 2/1/2016 Sr-90 0.65 +/- 1.27 0.00 NA c Pass MASO-1053 2/1/2016 Tc-99 0.1 +/- 5.5 0.0 NA c Pass MASO-1053 2/1/2016 Cs-134 908 +/- 26 1030 721 - 1339 Pass MASO-1053 2/1/2016 Cs-137 0.10 +/- 6.20 0.00 NA c Pass MASO-1053 2/1/2016 Co-57 1058 +/- 26 992 694 - 1290 Pass MASO-1053 2/1/2016 Co-60 1229 +/- 28 1190 833 - 1547 Pass MASO-1053 2/1/2016 Mn-54 1235 +/- 43 1160 812 - 1508 Pass MASO-1053 2/1/2016 Zn-65 753 +/- 64 692 484 - 900 Pass MASO-1053 2/1/2016 K-40 753 +/- 140 607 425 - 789 Pass MASO-1053 2/1/2016 Am-241 79 +/-6 103 72 - 134 Pass MASO-1053 2/1/2016 Pu-238 73.9 +/- 9.2 63.6 44.5 - 82.7 Pass MASO-1053 2/1/2016 Pu-239/240 0.76 +/- 1.34 0.21 NA d Pass MASO-1053 2/1/2016 U-234/233 45.0 +/- 5.1 45.9 32.1 - 59.7 Pass MASO-1053 2/1/2016 U-238 129 +/-9 146 102 - 190 Pass MAW-989 2/1/2016 Am-241 0.018 +/- 0.015 0.00 NA c Pass MAW-989 2/1/2016 H-3 0.2 +/- 2.8 0.0 NA c Pass MAW-989 2/1/2016 Ni-63 12.8 +/- 2.7 12.3 8.6 - 16.0 Pass MAW-989 2/1/2016 Sr-90 8.70 +/- 1.20 8.74 6.12 - 11.36 Pass MAW-989 2/1/2016 Tc-99 -1.1 +/- 0.6 0.0 NA c Pass MAW-989 2/1/2016 Cs-134 15.5 +/- 0.3 16.1 11.3 +/- 20.9 Pass MAW-989 2/1/2016 Cs-137 23.7 +/- 0.5 21.2 14.8 - 27.6 Pass MAW-989e 2/1/2016 Co-57 1.38 +/- 0.12 0.00 NA c Fail MAW-989 2/1/2016 Co-60 12.5 +/- 0.3 11.8 8.3 - 15.3 Pass MAW-989 2/1/2016 Mn-54 12.2 +/- 0.4 11.1 7.8 - 14.4 Pass MAW-989 2/1/2016 Zn-65 15.7 +/- 0.7 13.6 9.5 - 17.7 Pass MAW-989 2/1/2016 K-40 288 +/-5 251 176 - 326 Pass MAW-989 2/1/2016 Fe-55 17.3 +/- 7.0 16.2 11.3 - 21.1 Pass MAW-989 2/1/2016 Ra-226 0.710 +/- 0.070 0.718 0.503 - 0.933 Pass MAW-989 2/1/2016 Pu-238 1.280 +/- 0.110 1.244 0.871 +/- 1.617 Pass MAW-989 2/1/2016 Pu-239/240 0.640 +/- 0.080 0.641 0.449 - 0.833 Pass MAW-989 2/1/2016 U-234/233 1.39 +/- 0.12 1.48 1.04 - 1.92 Pass MAW-989 2/1/2016 U-238 1.43 +/- 0.12 1.53 1.07 - 1.99 Pass MAW-893 2/1/2016 Gross Alpha 0.600 +/- 0.050 0.673 0.202 - 1.144 Pass MAW-893 2/1/2016 Gross Beta 2.10 +/- 0.06 2.15 1.08 - 3.23 Pass MAW-896 2/1/2016 I-129 3.67 +/- 0.20 3.85 2.70 - 5.01 Pass MAAP-1056 2/1/2016 Gross Alpha 0.39 +/- 0.05 1.20 0.36 - 2.04 Pass MAAP-1056 2/1/2016 Gross Beta 1.03 +/- 0.07 0.79 0.40 - 1.19 Pass A6-1

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

Concentration a Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-1057 2/1/2016 Sr-90 1.34 +/- 0.15 1.38 0.97 +/- 1.79 Pass MAAP-1057 2/1/2016 Cs-134 -0.01 +/- 0.03 0.00 NA c Pass MAAP-1057 2/1/2016 Cs-137 2.57 +/- 0.10 2.30 1.61 - 2.99 Pass MAAP-1057 2/1/2016 Co-57 3.01 +/- 0.06 2.94 2.06 - 3.82 Pass MAAP-1057 2/1/2016 Co-60 4.28 +/- 0.10 4.02 2.81 - 5.23 Pass MAAP-1057 2/1/2016 Mn-54 4.90 +/- 0.13 4.53 3.17 - 5.89 Pass MAAP-1057 2/1/2016 Zn-65 4.09 +/- 0.18 3.57 2.50 - 4.64 Pass MAAP-1057 2/1/2016 Am-241 0.059 +/- 0.015 0.0805 0.0564 - 0.1047 Pass MAAP-1057 2/1/2016 Pu-238 0.066 +/- 0.020 0.0637 0.0446 - 0.0828 Pass MAAP-1057 2/1/2016 Pu-239/240 0.074 +/- 0.020 0.099 NA d Pass MAAP-1057 2/1/2016 U-234/233 0.151 +/- 0.026 0.165 0.116 - 0.215 Pass MAAP-1057 2/1/2016 U-238 0.160 +/- 0.026 0.172 0.120 - 0.224 Pass MAVE-1050 2/1/2016 Cs-134 9.83 +/- 0.19 10.62 7.43 - 13.81 Pass MAVE-1050 2/1/2016 Cs-137 6.06 +/- 0.19 5.62 3.93 - 7.31 Pass MAVE-1050 2/1/2016 Co-57 13.8 +/- 0.2 11.8 8.3 - 15.3 Pass MAVE-1050 2/1/2016 Co-60 0.022 +/- 0.040 0.00 NA c Pass MAVE-1050 2/1/2016 Mn-54 0.009 +/- 0.044 0.000 NA c Pass MAVE-1050 2/1/2016 Zn-65 10.67 +/- 0.39 9.60 6.70 - 12.50 Pass MASO-4780f 8/1/2016 Ni-63 648 +/- 14 990 693 - 1287 Fail MASO-4780g 8/1/2016 Ni-63 902 +/- 46 990 693 - 1287 Pass MASO-4780 8/1/2016 Sr-90 757 +/- 16 894 626 - 1162 Pass MASO-4780 8/1/2016 Tc-99 559 +/- 12 556 389 - 723 Pass MASO-4780 8/1/2016 Cs-134 0.93 +/- 2.92 0.00 NA c Pass MASO-4780 8/1/2016 Cs-137 1061 +/- 12 1067 747 - 1387 Pass MASO-4780 8/1/2016 Co-57 1178 +/-8 1190 833 - 1547 Pass MASO-4780 8/1/2016 Co-60 841 +/-9 851 596 - 1106 Pass MASO-4780 8/1/2016 Mn-54 0.69 +/- 2.53 0.00 NA c Pass MASO-4780 8/1/2016 Zn-65 724 +/- 19 695 487 - 904 Pass MASO-4780 8/1/2016 K-40 566 +/- 52 588 412 - 764 Pass MASO-4780 8/1/2016 Am-241 0.494 +/- 0.698 0.000 NA c Pass MASO-4780 8/1/2016 Pu-238 69.7 +/- 7.4 70.4 49.3 - 91.5 Pass MASO-4780 8/1/2016 Pu-239/240 53.9 +/- 6.3 53.8 37.7 - 69.9 Pass MASO-4780h 8/1/2016 U-233/234 46.8 +/- 3.9 122 85 - 159 Fail MASO-4780h 8/1/2016 U-238 46.6 +/- 3.9 121 85 - 157 Fail MAW-4776 8/1/2016 I-129 4.40 +/- 0.20 4.54 3.18 - 5.90 Pass MAVE-4782 8/1/2016 Cs-134 -0.01 +/- 0.05 0.00 NA c Pass MAVE-4782 8/1/2016 Cs-137 6.18 +/- 0.20 5.54 3.88 - 7.20 Pass MAVE-4782 8/1/2016 Co-57 8.13 +/- 0.16 6.81 4.77 - 8.85 Pass MAVE-4782 8/1/2016 Co-60 5.30 +/- 0.15 4.86 3.40 - 6.32 Pass MAVE-4782 8/1/2016 Mn-54 8.08 +/- 0.24 7.27 5.09 - 9.45 Pass MAVE-4782 8/1/2016 Zn-65 6.24 +/- 0.36 5.40 3.78 - 7.02 Pass A6-2

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

Concentration a Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-4784 8/1/2016 Sr-90 1.18 +/- 0.10 1.03 0.72 - 1.34 Pass MAAP-4784 8/1/2016 Cs-134 1.58 +/- 0.08 2.04 1.43 - 2.65 Pass MAAP-4784 8/1/2016 Cs-137 1.85 +/- 0.09 1.78 1.25 - 2.31 Pass MAAP-4784 8/1/2016 Co-57 2.39 +/- 0.52 2.48 1.74 - 3.22 Pass MAAP-4784 8/1/2016 Co-60 3.22 +/- 0.08 3.26 2.28 - 4.24 Pass MAAP-4784 8/1/2016 Mn-54 2.82 +/- 0.12 2.75 1.93 - 3.58 Pass MAAP-4784 8/1/2016 Zn-65 -0.015 +/- 0.062 0.00 NA c Pass MAAP-4784 8/1/2016 Am-241 -0.001 +/- 0.006 0.00 NA c Pass MAAP-4784 8/1/2016 Pu-238 0.075 +/- 0.022 0.069 0.049 - 0.090 Pass MAAP-4784 8/1/2016 Pu-239/240 0.048 +/- 0.015 0.054 0.038 - 0.070 Pass MAAP-4784 8/1/2016 U-234/233 0.151 +/- 0.036 0.150 0.105 - 0.195 Pass MAAP-4784 8/1/2016 U-238 0.147 +/- 0.034 0.156 0.109 - 0.203 Pass MAW-4778 8/1/2016 H-3 365 +/- 11 334 234 - 434 Pass MAW-4778 8/1/2016 Fe-55 23.6 +/- 16.3 21.5 15.1 +/- 28.0 Pass MAW-4778 8/1/2016 Ni-63 17.0 +/- 2.8 17.2 12.0 +/- 22.4 Pass MAW-4778 8/1/2016 Sr-90 0.17 +/- 0.28 0.00 NA c Pass MAW-4778 8/1/2016 Tc-99 9.50 +/- 0.41 11.60 8.10 - 15.10 Pass MAW-4778 8/1/2016 Cs-134 22.6 +/- 0.4 23.9 16.7 - 31.1 Pass MAW-4778 8/1/2016 Cs-137 0.018 +/- 0.117 0.00 NA c Pass MAW-4778 8/1/2016 Co-57 27.6 +/- 0.2 27.3 19.1 +/- 35.5 Pass MAW-4778 8/1/2016 Co-60 0.018 +/- 0.090 0.00 NA c Pass MAW-4778 8/1/2016 Mn-54 16.2 +/- 0.4 14.8 10.4 - 19.2 Pass MAW-4778 8/1/2016 Zn-65 19.3 +/- 0.7 17.4 12.2 - 22.6 Pass MAW-4778 8/1/2016 K-40 286 +/-6 252 176 - 328 Pass MAW-4778 8/1/2016 Ra-226 1.48 +/- 0.09 1.33 0.93 - 1.73 Pass MAW-4778 8/1/2016 Pu-238 1.09 +/- 0.13 1.13 0.79 - 1.47 Pass MAW-4778 8/1/2016 Pu-239/240 0.003 +/- 0.011 0.016 NA d Pass MAW-4778 8/1/2016 U-234/233 1.80 +/- 0.13 1.86 1.30 - 2.42 Pass MAW-4778 8/1/2016 U-238 1.77 +/- 0.13 1.92 1.34 - 2.50 Pass MAW-4778 8/1/2016 Am-241 0.678 +/- 0.086 0.814 0.570 +/- 1.058 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 Provided in the series for "sensitivity evaluation". MAPEP does not provide control limits.

e The laboratory properly identified the Sn-75 interfering peak in the vicinity of Co-57 and stated so in the comment field. MAPEP requires results to be reported as an activity with an uncertainty. Since the calculated uncertainty was less than the activity MAPEP interpreted the submitted result as a "false positive" resulting in a failure.

f Original analysis for Ni-63 failed.

g Reanalysis with a smaller aliquot resulted in acceptable results. An investigation is in process to identify better techniques for analyzing samples with complex matrices.

h MAPEP states that samples contain two fractions of Uranium; one that is soluble in concentrated HNO 3 and HCl acid and one that is "fundamentally insoluble in these acids". They also state that HF treatment can not assure complete dissolution.

Results are consistent with measuring the soluble form.

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 Acceptance ERAP-1101 3/14/2016 Am-241 37.3 45.9 28.3 - 62.1 Pass ERAP-1101 3/14/2016 Co-60 637 623 482 - 778 Pass ERAP-1101 3/14/2016 Cs-134 251 304 193 - 377 Pass ERAP-1101 3/14/2016 Cs-137 1,273 1,150 864 - 1,510 Pass ERAP-1101 3/14/2016 Fe-55 < 162 126 39.1 - 246 Pass ERAP-1101 3/14/2016 Mn-54 < 2.64 < 50.0 0.00 - 50.0 Pass ERAP-1101 3/14/2016 Pu-238 68.0 70.5 48.3 - 92.7 Pass ERAP-1101 3/14/2016 Pu-239/240 54.1 54.8 39.70 - 71.60 Pass ERAP-1101 3/14/2016 Sr-90 139 150 73.3 - 225.0 Pass ERAP-1101 3/14/2016 U-233/234 59.3 64.8 40.2 - 97.7 Pass ERAP-1101 3/14/2016 U-238 55.5 64.2 41.5 - 88.8 Pass ERAP-1101 3/14/2016 Zn-65 428 356 255 - 492 Pass ERAP-1101 3/14/2016 Gr. Alpha 98.0 70.1 23.5 - 109 Pass ERAP-1101 3/14/2016 Gr. Beta 78.6 54.4 34.4 - 79.3 Pass ERSO-1105 3/14/2016 Am-241 1,030 1,360 796 - 1,770 Pass ERSO-1105 3/14/2016 Ac-228 1,540 1,240 795 - 1,720 Pass ERSO-1105 3/14/2016 Bi-212 1,550 1,240 330 - 1,820 Pass ERSO-1105 3/14/2016 Bi-214 3,100 3,530 2,130 - 5,080 Pass ERSO-1105 3/14/2016 Co-60 5,600 5,490 3,710 - 7,560 Pass ERSO-1105 3/14/2016 Cs-134 3,030 3,450 2,260 - 4,140 Pass ERSO-1105 3/14/2016 Cs-137 4,440 4,310 3,300 - 5,550 Pass ERSO-1105 3/14/2016 K-40 10,300 10,600 7,740 - 14,200 Pass ERSO-1105 3/14/2016 Mn-54 < 50.8 < 1000 0.0 - 1,000 Pass ERSO-1105 3/14/2016 Pb-212 1,140 1,240 812 - 1,730 Pass ERSO-1105 3/14/2016 Pb-214 3,190 3,710 2,170 - 5,530 Pass ERSO-1105 3/14/2016 Pu-238 680 658 396 - 908 Pass ERSO-1105 3/14/2016 Pu-239/240 460 496 324 - 0,685 Pass ERSO-1105 3/14/2016 Sr-90 7,740 8,560 3,260 - 13,500 Pass ERSO-1105 3/14/2016 Th-234 3,630 3,430 1,080 - 6,450 Pass ERSO-1105 3/14/2016 U-233/234 3,090 3,460 2,110 - 4,430 Pass ERSO-1105 3/14/2016 U-238 3,280 3,430 2,120 - 4,350 Pass ERSO-1105 3/14/2016 Zn-65 2,940 2,450 1,950 - 3,260 Pass ERW-1115 3/14/2016 Gr. Alpha 105.0 117.0 41.5 - 181.0 Pass ERW-1115 3/14/2016 Gr. Beta 76.2 75.5 43.2 - 112.0 Pass ERW-1117 3/14/2016 H-3 8,870 8,650 5,800 - 12,300 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 Acceptance ERVE-1108 3/14/2016 Am-241 1,930 2,120 1,300 - 2,820 Pass ERVE-1108 3/14/2016 Cm-244 1,294 1,560 764 - 2,430 Pass ERVE-1108 3/14/2016 Co-60 1,164 1,100 759 - 1,540 Pass ERVE-1108 3/14/2016 Cs-134 1,056 1,070 687 - 1,390 Pass ERVE-1108 3/14/2016 Cs-137 930 838 608 - 1,170 Pass ERVE-1108 3/14/2016 K-40 32,200 31,000 22,400 - 43,500 Pass ERVE-1108 3/14/2016 Mn-54 < 24.5 < 300 0.00 - 300 Pass ERVE-1108 3/14/2016 Zn-65 3,320 2,820 2,030 - 3,960 Pass ERVE-1108 3/14/2016 Pu-238 3,410 2,810 1,680 - 3,850 Pass ERVE-1108 3/14/2016 Pu-239/240 4,120 3,640 2,230 - 5,010 Pass ERVE-1108 3/14/2016 Sr-90 8,120 8,710 4,960 - 11,500 Pass ERVE-1108 3/14/2016 U-233/234 4,350 4,160 2,740 - 5,340 Pass ERVE-1108 3/14/2016 U-238 4,220 4,120 2,750 - 5,230 Pass ERW-1111 3/14/2016 Am-241 113 121 81.5 - 162 Pass ERW-1111 3/14/2016 Co-60 1,120 1,050 912 - 1,230 Pass ERW-1111 3/14/2016 Cs-134 806 842 618 - 968 Pass ERW-1111 3/14/2016 Cs-137 1,190 1,100 934 - 1,320 Pass ERW-1111 3/14/2016 Mn-54 < 5.89 < 100 0.00 - 100 Pass ERW-1111 3/14/2016 Pu-238 159 138 102 - 172 Pass ERW-1111 3/14/2016 Pu-239/240 113 98.7 76.6 - 124 Pass ERW-1111 3/14/2016 U-233/234 46.9 52.7 39.6 - 68.0 Pass ERW-1111 3/14/2016 U-238 50.4 52.3 39.9 - 64.2 Pass ERW-1111 3/14/2016 Zn-65 1,160 1,010 842 - 1,270 Pass ERW-1111 3/14/2016 Fe-55 1,600 1,650 984 - 2,240 Pass ERW-1111 3/14/2016 Sr-90 430 434 283 - 574 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 (1 sigma, 1 determination) and control limits as provided by ERA.

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 Reported result: x +/- s; where x = (1/2) (x1 + x2) and s = (1/2) s12 s 22 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

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

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D-3 D-4 Figure D-4, Sample Collection and Analysis Program: Radiological Environmental Monitoring Program, Well Water and Shoreline sampling locations. (Table 5.2)

D-5

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935 ~\~SL D-6

  • All 1"'\.1 Environmental, Inc.

Midwest Laboratory 700 Landwehr Road

  • Northbrook, IL 60062-2310 phone (847) 564-0700
  • fax (847) 56*H517 XCEL ENERGY CORPORATION MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO 50-263 LICENSE NO DPR-22 ANNUAL REPORT TO THE UNITED STATES NUCLEAR REGULATORY COMMISSION PART II Radiological Environmental Monitoring Program Complete Analyses Data Tables January- December, 2016 Prepared under contract by ENVIRONMENTAL, INC MIDWEST LABORATORY PROJECT NO 8010 Reviewed and Approved

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 2016 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 20 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-008 January 16 None No composite.

Water frozen entire month; SW Gamma M-008 February 16 None No composite.

SW Gamma M-008 3/2/16 Water frozen. None SS Gamma M-8 Spring 16 Dangerous River Conditions. None SS Gamma M-9 Spring 16 Dangerous River Conditions. None SS Gamma M-15 Spring 16 Dangerous River Conditions. None Weekly sample lost; Beta,I-131, DW M-014 6/29/16 Not included in June 16 None Gamma Composite Gamma TLD M-2C 3rd Qtr. TLD missing in field. None AP/AI Beta, I-131 M-05 9/7/16 29.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> run time. None AP/AI Beta, I-131 M-04 9/14/16 Filter offset in sample head. Counsel Technicians.

TLD Gamma M-3A 4th Qtr TLD missing in field. None TLD Gamma M-11A 4th Qtr TLD missing in field. None TLD Gamma M-12A 4th Qtr TLD missing in field. None BO Gamma M-8 2016 Dangerous river conditions. None BO Gamma M-9 2016 Dangerous river conditions. None 12/14/16 to SW Gamma M-001 Water Frozen. None 12/28/16 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 15.3 +/- 1.3 12.9 +/- 1.4 19.2 +/- 0.9 16.0 +/- 1.6 15.8 15.8 M-02A 12.8 +/- 1.1 12.6 +/- 0.9 17.7 +/- 0.8 15.6 +/- 0.7 14.7 14.1 M-03A 12.3 +/- 1.3 13.1 +/- 1.4 14.8 +/- 1.3 NDa 13.4 14.4 M-04A 11.4 +/- 1.1 14.3 +/- 0.9 14.3 +/- 2.1 17.3 +/- 1.1 14.3 13.4 M-05A 13.3 +/- 0.6 12.4 +/- 1.1 17.1 +/- 1.5 14.8 +/- 0.8 14.4 13.7 M-06A 15.3 +/- 0.8 15.6 +/- 1.3 18.9 +/- 1.7 18.9 +/- 1.0 17.2 16.6 M-07A 12.2 +/- 0.9 12.6 +/- 1.1 14.6 +/- 1.1 17.3 +/- 0.8 14.2 12.5 M-08A 13.9 +/- 0.9 14.0 +/- 0.9 15.7 +/- 2.0 17.6 +/- 0.7 15.3 14.9 M-09A 13.3 +/- 1.0 13.0 +/- 1.2 15.6 +/- 0.9 16.5 +/- 1.1 14.6 14.1 M-10A 13.3 +/- 1.2 13.3 +/- 1.0 14.9 +/- 0.8 16.3 +/- 0.7 14.5 14.2 M-11A 15.5 +/- 1.2 15.8 +/- 1.3 17.2 +/- 1.1 NDa 16.2 17.1 M-12A 15.0 +/- 1.0 15.7 +/- 0.9 17.0 +/- 1.0 NDa 15.9 16.4 M-13A 13.7 +/- 1.0 14.3 +/- 1.8 15.1 +/- 1.2 17.0 +/- 1.1 15.0 15.1 M-14A 13.7 +/- 1.0 14.5 +/- 1.1 16.2 +/- 1.1 17.1 +/- 0.7 15.4 14.8 Mean +/- s.d. 13.6 +/- 1.3 13.9 +/- 1.2 16.3 +/- 1.6 16.8 +/- 1.1 15.1 14.8 Indicators (Outer Ring, 4-5 Miles Distant)

M-01B 13.1 +/- 1.0 13.9 +/- 1.4 15.0 +/- 0.7 16.8 +/- 1.2 14.7 14.8 M-02B 13.3 +/- 0.8 14.2 +/- 1.0 15.3 +/- 1.3 16.3 +/- 0.9 14.8 14.2 M-03B 10.4 +/- 0.8 10.8 +/- 1.0 12.6 +/- 0.9 13.0 +/- 0.8 11.7 11.7 M-04B 13.4 +/- 0.7 12.1 +/- 0.8 15.0 +/- 0.8 15.5 +/- 1.5 14.0 13.6 M-05B 12.8 +/- 0.7 11.7 +/- 1.2 14.2 +/- 0.9 15.9 +/- 0.9 13.6 13.0 M-06B 12.3 +/- 1.1 13.9 +/- 0.9 13.5 +/- 1.2 16.0 +/- 0.7 13.9 15.1 M-07B 13.9 +/- 1.1 13.5 +/- 1.4 16.0 +/- 1.2 15.9 +/- 1.3 14.8 14.8 M-08B 13.1 +/- 0.8 13.0 +/- 1.0 14.6 +/- 0.8 14.9 +/- 1.1 13.9 13.9 M-09B 11.6 +/- 1.0 14.8 +/- 1.2 15.2 +/- 1.4 17.2 +/- 1.0 14.7 14.5 M-10B 14.9 +/- 1.0 13.9 +/- 1.4 16.4 +/- 1.5 15.9 +/- 1.2 15.3 14.8 M-11B 13.9 +/- 1.1 12.7 +/- 1.2 15.4 +/- 1.3 16.7 +/- 1.0 14.7 14.8 M-12B 13.5 +/- 1.2 14.3 +/- 1.0 13.8 +/- 0.9 16.1 +/- 1.0 14.4 15.3 M-13B 13.7 +/- 1.2 12.2 +/- 1.0 15.6 +/- 1.2 14.5 +/- 0.7 14.0 12.3 M-14B 14.1 +/- 1.6 16.6 +/- 1.0 15.8 +/- 2.0 18.2 +/- 0.7 16.2 16.6 M-15B 13.3 +/- 0.8 13.7 +/- 1.4 15.6 +/- 0.7 15.7 +/- 1.0 14.6 13.7 M-16B 14.3 +/- 0.8 12.5 +/- 1.2 15.0 +/- 0.9 15.0 +/- 0.9 14.2 13.5 Mean +/- s.d. 13.2 +/- 1.1 13.4 +/- 1.4 14.9 +/- 1.0 15.8 +/- 1.2 14.3 14.2 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 13.3 +/- 1.4 14.3 +/- 1.1 13.9 +/- 1.8 14.6 +/- 1.1 14.0 13.4 M-02C 17.4 +/- 0.9 18.4 +/- 1.0 NDa 16.7 +/- 0.8 17.5 17.5 M-03C 14.8 +/- 0.8 15.8 +/- 1.3 14.9 +/- 1.3 16.0 +/- 0.9 15.4 15.2 M-04C 14.6 +/- 1.3 15.0 +/- 0.9 14.6 +/- 1.4 15.2 +/- 0.7 14.9 15.1 Mean +/- s.d. 15.0 +/- 1.7 15.9 +/- 1.8 14.5 +/- 0.5 15.6 +/- 0.9 15.4 15.3 Indicators (Special Interest Areas)

M-01S 9.4 +/- 1.1 11.6 +/- 0.9 10.8 +/- 1.3 13.1 +/- 0.6 11.2 11.6 M-02S 13.3 +/- 1.3 12.8 +/- 1.0 14.6 +/- 1.3 14.9 +/- 1.1 13.9 14.3 M-03S 12.9 +/- 0.9 13.8 +/- 1.1 14.7 +/- 1.2 15.7 +/- 1.4 14.3 14.3 M-04S 16.0 +/- 1.5 13.7 +/- 1.0 17.9 +/- 1.5 17.0 +/- 0.9 16.2 16.4 M-05S 14.9 +/- 1.2 16.5 +/- 1.2 14.5 +/- 1.3 17.0 +/- 1.0 15.7 15.6 M-06S 15.3 +/- 0.8 16.9 +/- 1.1 15.7 +/- 0.9 16.5 +/- 0.9 16.1 16.2 M-I-11 16.9 +/- 2.0 15.6 +/- 1.1 19.0 +/- 1.4 14.3 +/- 0.8 16.5 14.3 M-I-12 15.2 +/- 0.9 14.7 +/- 1.3 14.8 +/- 1.9 14.6 +/- 0.9 14.8 14.7 M-I-13 15.2 +/- 2.0 15.7 +/- 1.5 15.6 +/- 2.2 23.0 +/- 1.6 17.4 15.5 Mean +/- s.d. 14.3 +/- 2.2 14.6 +/- 1.7 15.3 +/- 2.3 16.2 +/- 2.9 15.1 14.8 ISFSI Fence (Non-REMP TLDs)

M-I-01 41.5 +/- 2.4 38.7 +/- 2.4 39.5 +/- 1.1 39.4 +/- 2.2 39.8 37.7 M-I-02 35.8 +/- 0.9 35.4 +/- 1.0 35.0 +/- 1.4 34.9 +/- 0.7 35.3 33.9 M-I-03 31.9 +/- 1.6 29.4 +/- 1.9 31.9 +/- 2.1 30.5 +/- 1.8 30.9 29.3 M-I-04 35.5 +/- 3.1 33.7 +/- 2.1 36.5 +/- 2.2 35.9 +/- 2.2 35.4 34.5 M-I-05 74.9 +/- 1.4 68.6 +/- 3.4 66.4 +/- 2.5 61.1 +/- 1.9 67.7 73.9 M-I-06 29.0 +/- 1.7 26.4 +/- 1.4 29.0 +/- 2.0 26.0 +/- 1.4 27.6 26.8 M-I-07 33.4 +/- 1.5 31.8 +/- 2.8 31.3 +/- 2.4 28.7 +/- 1.2 31.3 30.4 M-I-08 30.1 +/- 2.8 28.6 +/- 2.3 30.4 +/- 2.7 27.2 +/- 0.7 29.1 27.9 M-I-09 64.5 +/- 2.1 63.1 +/- 3.1 50.0 +/- 2.3 48.3 +/- 2.7 56.5 146.6 M-I-10 41.4 +/- 0.8 33.5 +/- 1.8 38.9 +/- 1.3 33.3 +/- 1.3 36.8 37.2 Mean +/- s.d. 41.8 +/- 15.5 38.9 +/- 14.7 38.9 +/- 11.4 36.5 +/- 10.8 39.0 40.2 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 01-06-16 349 0.046 +/- 0.004 07-06-16 323 0.019 +/- 0.003 01-13-16 297 0.046 +/- 0.005 07-13-16 326 0.014 +/- 0.003 01-20-16 354 0.046 +/- 0.004 07-20-16 355 0.018 +/- 0.003 01-27-16 321 0.054 +/- 0.005 07-27-16 320 0.021 +/- 0.003 02-03-16 326 0.022 +/- 0.003 08-03-16 292 0.030 +/- 0.004 02-10-16 401 0.029 +/- 0.003 08-10-16 296 0.021 +/- 0.003 02-17-16 414 0.021 +/- 0.003 08-16-16 276 0.020 +/- 0.003 02-23-16 357 0.017 +/- 0.003 08-24-16 336 0.026 +/- 0.003 03-02-16 436 0.025 +/- 0.003 08-30-16 252 0.023 +/- 0.004 03-09-16 401 0.021 +/- 0.003 09-07-16 431 0.019 +/- 0.003 03-16-16 348 0.025 +/- 0.003 09-14-16 371 0.018 +/- 0.003 03-23-16 383 0.013 +/- 0.003 09-21-16 343 0.024 +/- 0.003 03-30-16 385 0.021 +/- 0.003 09-28-16 342 0.017 +/- 0.003 1st Quarter Mean +/- s.d. 0.030 +/- 0.013 3rd Quarter Mean +/- s.d. 0.021 +/- 0.004 04-06-16 386 0.024 +/- 0.003 10-05-16 314 0.023 +/- 0.003 04-13-16 382 0.017 +/- 0.003 10-12-16 341 0.016 +/- 0.003 04-20-16 386 0.025 +/- 0.003 10-19-16 340 0.022 +/- 0.003 04-27-16 332 0.019 +/- 0.003 10-26-16 375 0.018 +/- 0.003 11-02-16 344 0.024 +/- 0.003 05-04-16 351 0.015 +/- 0.003 05-11-16 324 0.021 +/- 0.003 11-09-16 343 0.039 +/- 0.004 05-18-16 321 0.013 +/- 0.003 11-16-16 310 0.032 +/- 0.004 05-25-16 325 0.029 +/- 0.003 11-23-16 346 0.017 +/- 0.003 06-01-16 322 0.020 +/- 0.003 11-30-16 308 0.040 +/- 0.004 06-08-16 323 0.012 +/- 0.003 12-07-16 313 0.027 +/- 0.004 06-15-16 325 0.022 +/- 0.003 12-14-16 310 0.026 +/- 0.004 06-22-16 355 0.019 +/- 0.003 12-21-16 312 0.038 +/- 0.004 06-29-16 353 0.015 +/- 0.003 12-28-16 322 0.027 +/- 0.003 2nd Quarter Mean +/- s.d. 0.019 +/- 0.005 4th Quarter Mean +/- s.d. 0.027 +/- 0.008 Cumulative Average 0.024 Previous Annual Average 0.028 a

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

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 01-06-16 327 0.053 +/- 0.005 07-06-16 296 0.020 +/- 0.003 01-13-16 317 0.040 +/- 0.004 07-13-16 328 0.014 +/- 0.003 01-20-16 324 0.046 +/- 0.004 07-20-16 323 0.023 +/- 0.003 01-27-16 304 0.052 +/- 0.005 07-27-16 326 0.020 +/- 0.003 02-03-16 279 0.025 +/- 0.004 08-03-16 323 0.023 +/- 0.003 02-10-16 314 0.032 +/- 0.004 08-10-16 303 0.024 +/- 0.003 02-17-16 322 0.027 +/- 0.004 08-16-16 253 0.015 +/- 0.003 02-23-16 280 0.022 +/- 0.004 08-24-16 310 0.029 +/- 0.004 03-02-16 376 0.025 +/- 0.003 08-30-16 234 0.024 +/- 0.004 03-09-16 315 0.022 +/- 0.003 09-07-16 384 0.021 +/- 0.003 03-16-16 299 0.029 +/- 0.004 09-14-16 326 0.020 +/- 0.003 03-23-16 313 0.016 +/- 0.003 09-21-16 312 0.025 +/- 0.003 03-30-16 304 0.023 +/- 0.004 09-28-16 285 0.020 +/- 0.003 1st Quarter Mean +/- s.d. 0.032 +/- 0.012 3rd Quarter Mean +/- s.d. 0.022 +/- 0.004 04-06-16 324 0.024 +/- 0.003 10-05-16 342 0.023 +/- 0.003 04-13-16 304 0.024 +/- 0.003 10-12-16 310 0.019 +/- 0.003 04-20-16 325 0.024 +/- 0.003 10-19-16 286 0.037 +/- 0.004 04-27-16 326 0.013 +/- 0.003 10-26-16 336 0.016 +/- 0.003 11-02-16 311 0.028 +/- 0.004 05-04-16 305 0.018 +/- 0.003 05-11-16 352 0.020 +/- 0.003 11-09-16 313 0.040 +/- 0.004 05-18-16 350 0.011 +/- 0.002 11-16-16 286 0.036 +/- 0.004 05-25-16 327 0.025 +/- 0.003 11-23-16 314 0.020 +/- 0.003 06-01-16 353 0.018 +/- 0.003 11-30-16 284 0.044 +/- 0.005 06-08-16 352 0.010 +/- 0.002 12-07-16 287 0.026 +/- 0.004 06-15-16 327 0.022 +/- 0.003 12-14-16 338 0.026 +/- 0.003 06-22-16 325 0.020 +/- 0.003 12-21-16 286 0.044 +/- 0.004 06-29-16 352 0.015 +/- 0.003 12-28-16 337 0.023 +/- 0.003 2nd Quarter Mean +/- s.d. 0.019 +/- 0.005 4th Quarter Mean +/- s.d. 0.029 +/- 0.010 Cumulative Average 0.025 Previous Annual Average 0.029 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 01-06-16 329 0.057 +/- 0.005 07-06-16 351 0.020 +/- 0.003 01-13-16 295 0.049 +/- 0.005 07-13-16 355 0.016 +/- 0.003 01-20-16 325 0.052 +/- 0.005 07-20-16 377 0.021 +/- 0.003 01-27-16 307 0.060 +/- 0.005 07-27-16 381 0.024 +/- 0.003 02-03-16 307 0.029 +/- 0.004 08-03-16 377 0.024 +/- 0.003 02-10-16 310 0.037 +/- 0.004 08-10-16 358 0.021 +/- 0.003 02-17-16 321 0.031 +/- 0.004 08-16-16 322 0.019 +/- 0.003 02-23-16 280 0.025 +/- 0.004 08-24-16 434 0.025 +/- 0.003 03-02-16 376 0.029 +/- 0.003 08-30-16 327 0.022 +/- 0.003 03-09-16 315 0.027 +/- 0.004 09-07-16 371 0.023 +/- 0.003 03-16-16 298 0.027 +/- 0.004 09-14-16 335 0.021 +/- 0.003 03-23-16 326 0.019 +/- 0.003 09-21-16 321 0.023 +/- 0.003 03-30-16 329 0.026 +/- 0.004 09-28-16 326 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.036 +/- 0.014 3rd Quarter Mean +/- s.d. 0.022 +/- 0.003 04-06-16 323 0.027 +/- 0.003 10-05-16 330 0.022 +/- 0.003 04-13-16 304 0.019 +/- 0.003 10-12-16 325 0.017 +/- 0.003 04-20-16 324 0.024 +/- 0.003 10-19-16 327 0.026 +/- 0.003 04-27-16 326 0.018 +/- 0.003 10-26-16 326 0.020 +/- 0.003 11-02-16 325 0.024 +/- 0.003 05-04-16 331 0.016 +/- 0.003 05-11-16 353 0.019 +/- 0.003 11-09-16 331 0.038 +/- 0.004 05-18-16 377 0.013 +/- 0.002 11-16-16 327 0.037 +/- 0.004 05-25-16 355 0.030 +/- 0.003 11-23-16 304 0.024 +/- 0.003 06-01-16 352 0.019 +/- 0.003 11-30-16 249 0.051 +/- 0.005 06-08-16 352 0.014 +/- 0.003 12-07-16 253 0.026 +/- 0.004 06-15-16 354 0.021 +/- 0.003 12-14-16 251 0.035 +/- 0.004 06-22-16 352 0.021 +/- 0.003 12-21-16 252 0.046 +/- 0.005 06-29-16 352 0.016 +/- 0.003 12-28-16 338 0.026 +/- 0.003 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 4th Quarter Mean +/- s.d. 0.030 +/- 0.010 Cumulative Average 0.027 Previous Annual Average 0.030 a

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

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 01-06-16 352 0.055 +/- 0.005 07-06-16 403 0.016 +/- 0.003 01-13-16 318 0.047 +/- 0.005 07-13-16 435 0.016 +/- 0.002 01-20-16 324 0.052 +/- 0.005 07-20-16 405 0.021 +/- 0.003 01-27-16 328 0.054 +/- 0.005 07-27-16 433 0.023 +/- 0.003 02-03-16 354 0.022 +/- 0.003 08-03-16 404 0.027 +/- 0.003 02-10-16 315 0.040 +/- 0.004 08-10-16 410 0.022 +/- 0.003 02-17-16 347 0.026 +/- 0.004 08-16-16 370 0.020 +/- 0.003 02-23-16 280 0.022 +/- 0.004 08-24-16 465 0.028 +/- 0.003 03-02-16 375 0.029 +/- 0.003 08-30-16 373 0.020 +/- 0.003 03-09-16 327 0.030 +/- 0.004 09-07-16 415 0.018 +/- 0.003 03-16-16 324 0.030 +/- 0.004 09-14-16 NDb 03-23-16 326 0.017 +/- 0.003 09-21-16 364 0.023 +/- 0.003 03-30-16 328 0.028 +/- 0.004 09-28-16 363 0.019 +/- 0.003 1st Quarter Mean +/- s.d. 0.035 +/- 0.013 3rd Quarter Mean +/- s.d. 0.021 +/- 0.004 04-06-16 325 0.029 +/- 0.004 10-05-16 327 0.024 +/- 0.003 04-13-16 328 0.021 +/- 0.003 10-12-16 336 0.015 +/- 0.003 04-20-16 325 0.024 +/- 0.003 10-19-16 363 0.024 +/- 0.003 04-27-16 326 0.019 +/- 0.003 10-26-16 337 0.022 +/- 0.003 11-02-16 363 0.025 +/- 0.003 05-04-16 329 0.019 +/- 0.003 05-11-16 407 0.021 +/- 0.003 11-09-16 362 0.041 +/- 0.004 05-18-16 404 0.012 +/- 0.002 11-16-16 364 0.032 +/- 0.003 05-25-16 410 0.031 +/- 0.003 11-23-16 340 0.021 +/- 0.003 06-01-16 405 0.019 +/- 0.003 11-30-16 336 0.042 +/- 0.004 06-08-16 406 0.013 +/- 0.002 12-07-16 313 0.026 +/- 0.003 06-15-16 436 0.020 +/- 0.003 12-14-16 303 0.030 +/- 0.004 06-22-16 434 0.022 +/- 0.003 12-21-16 339 0.036 +/- 0.004 06-29-16 433 0.017 +/- 0.002 12-28-16 337 0.026 +/- 0.003 2nd Quarter Mean +/- s.d. 0.021 +/- 0.005 4th Quarter Mean +/- s.d. 0.028 +/- 0.008 Cumulative Average 0.026 Previous Annual Average 0.031 a

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

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

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 01-06-16 323 0.054 +/- 0.005 07-06-16 296 0.027 +/- 0.004 01-13-16 297 0.044 +/- 0.005 07-13-16 326 0.015 +/- 0.003 01-20-16 293 0.056 +/- 0.005 07-20-16 322 0.024 +/- 0.003 01-27-16 325 0.052 +/- 0.005 07-27-16 322 0.023 +/- 0.003 02-03-16 296 0.028 +/- 0.004 08-03-16 292 0.029 +/- 0.004 02-10-16 355 0.031 +/- 0.004 08-10-16 296 0.025 +/- 0.003 02-17-16 385 0.024 +/- 0.003 08-16-16 251 0.024 +/- 0.004 02-23-16 334 0.017 +/- 0.003 08-24-16 336 0.026 +/- 0.003 03-02-16 406 0.024 +/- 0.003 08-30-16 253 0.020 +/- 0.004 03-09-16 355 0.022 +/- 0.003 09-07-16 NDb 03-16-16 351 0.024 +/- 0.003 09-14-16 384 0.019 +/- 0.003 03-23-16 353 0.015 +/- 0.003 09-21-16 352 0.024 +/- 0.003 03-30-16 356 0.019 +/- 0.003 09-28-16 351 0.018 +/- 0.003 1st Quarter Mean +/- s.d. 0.032 +/- 0.015 3rd Quarter Mean +/- s.d. 0.023 +/- 0.004 04-06-16 354 0.023 +/- 0.003 10-05-16 322 0.026 +/- 0.003 04-13-16 355 0.020 +/- 0.003 10-12-16 350 0.017 +/- 0.003 04-20-16 354 0.023 +/- 0.003 10-19-16 320 0.028 +/- 0.004 04-27-16 353 0.015 +/- 0.003 10-26-16 350 0.021 +/- 0.003 11-02-16 352 0.023 +/- 0.003 05-04-16 356 0.015 +/- 0.003 05-11-16 324 0.022 +/- 0.003 11-09-16 354 0.039 +/- 0.004 05-18-16 321 0.013 +/- 0.003 11-16-16 320 0.038 +/- 0.004 05-25-16 325 0.029 +/- 0.004 11-23-16 354 0.020 +/- 0.003 06-01-16 294 0.024 +/- 0.003 11-30-16 317 0.042 +/- 0.004 06-08-16 294 0.017 +/- 0.003 12-07-16 321 0.027 +/- 0.003 06-15-16 325 0.021 +/- 0.003 12-14-16 319 0.028 +/- 0.004 06-22-16 323 0.022 +/- 0.003 12-21-16 320 0.044 +/- 0.004 06-29-16 323 0.018 +/- 0.003 12-28-16 322 0.027 +/- 0.003 2nd Quarter Mean +/- s.d. 0.020 +/- 0.005 4th Quarter Mean +/- s.d. 0.029 +/- 0.009 Cumulative Average 0.026 Previous Annual Average 0.031 a

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

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

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 Control 0.043 0.022 0.054 Control 0.021 0.017 0.025 M-1 0.043 0.022 0.054 M-1 0.021 0.017 0.025 Indicators 0.046 0.022 0.060 Indicators 0.022 0.013 0.029 M-2 0.043 0.025 0.053 M-2 0.021 0.013 0.024 M-3 0.049 0.029 0.060 M-3 0.022 0.018 0.027 M-4 0.046 0.022 0.055 M-4 0.023 0.019 0.029 M-5 0.047 0.028 0.056 M-5 0.020 0.015 0.023 February May Location Average Minima Maxima Location Average Minima Maxima Control 0.023 0.017 0.029 Control 0.020 0.013 0.029 M-1 0.023 0.017 0.029 M-1 0.020 0.013 0.029 Indicators 0.028 0.017 0.040 Indicators 0.020 0.011 0.031 M-2 0.026 0.022 0.032 M-2 0.018 0.011 0.025 M-3 0.030 0.025 0.037 M-3 0.019 0.013 0.030 M-4 0.029 0.022 0.040 M-4 0.020 0.012 0.031 M-5 0.024 0.017 0.031 M-5 0.020 0.013 0.029 March June Location Average Minima Maxima Location Average Minima Maxima Control 0.020 0.013 0.025 Control 0.017 0.012 0.022 M-1 0.020 0.013 0.025 M-1 0.017 0.012 0.022 Indicators 0.023 0.015 0.030 Indicators 0.018 0.010 0.022 M-2 0.023 0.016 0.029 M-2 0.017 0.010 0.022 M-3 0.025 0.019 0.027 M-3 0.018 0.014 0.021 M-4 0.026 0.017 0.030 M-4 0.018 0.013 0.022 M-5 0.020 0.015 0.024 M-5 0.019 0.017 0.022 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 Control 0.021 0.014 0.030 Control 0.020 0.016 0.023 M-1 0.021 0.014 0.030 M-1 0.020 0.016 0.023 Indicators 0.021 0.014 0.030 Indicators 0.022 0.015 0.037 M-2 0.020 0.014 0.023 M-2 0.024 0.016 0.037 M-3 0.021 0.016 0.024 M-3 0.022 0.017 0.026 M-4 0.021 0.016 0.027 M-4 0.021 0.015 0.024 M-5 0.024 0.015 0.030 M-5 0.023 0.017 0.028 August November Location Average Minima Maxima Location Average Minima Maxima Control 0.022 0.020 0.026 Control 0.032 0.017 0.040 M-1 0.022 0.020 0.026 M-1 0.032 0.017 0.040 Indicators 0.023 0.015 0.029 Indicators 0.035 0.020 0.051 M-2 0.023 0.015 0.029 M-2 0.035 0.020 0.044 M-3 0.022 0.019 0.025 M-3 0.038 0.024 0.051 M-4 0.023 0.020 0.028 M-4 0.034 0.021 0.042 M-5 0.024 0.020 0.026 M-5 0.035 0.020 0.042 September December Location Average Minima Maxima Location Average Minima Maxima Control Control 0.029 0.026 0.038 M-1 0.019 0.017 0.024 M-1 0.029 0.026 0.038 Indicators 0.021 0.018 0.025 Indicators 0.032 0.023 0.046 M-2 0.022 0.020 0.025 M-2 0.033 0.023 0.044 M-3 0.022 0.021 0.023 M-3 0.033 0.026 0.046 M-4 0.020 0.018 0.023 M-4 0.030 0.026 0.036 M-5 0.020 0.018 0.024 M-5 0.031 0.027 0.044 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- 1831 MAP- 3820 MAP- 5656 MAP- 7159 3

Volume(m ) 4773 4486 4262 4278 Be-7 0.060 +/- 0.010 0.082 +/- 0.014 0.081 +/- 0.016 0.050 +/- 0.016 0.069 0.066 Mn-54 < 0.0006 < 0.0007 < 0.0010 < 0.0005 <0.0010 <0.0005 Co-58 < 0.0008 < 0.0008 < 0.0006 < 0.0007 <0.0008 <0.0007 Co-60 < 0.0006 < 0.0006 < 0.0008 < 0.0007 <0.0008 <0.0009 Zn-65 < 0.0007 < 0.0017 < 0.0012 < 0.0016 <0.0017 <0.0012 Zr-Nb-95 < 0.0009 < 0.0012 < 0.0011 < 0.0012 <0.0012 <0.0008 Ru-103 < 0.0008 < 0.0010 < 0.0007 < 0.0011 <0.0010 <0.0008 Ru-106 < 0.0056 < 0.0080 < 0.0055 < 0.0091 <0.0080 <0.0049 Cs-134 < 0.0007 < 0.0008 < 0.0008 < 0.0009 <0.0008 <0.0006 Cs-137 < 0.0008 < 0.0008 < 0.0006 < 0.0011 <0.0008 <0.0006 Ba-La-140 < 0.0034 < 0.0015 < 0.0042 < 0.0021 <0.0042 <0.0017 Ce-141 < 0.0012 < 0.0019 < 0.0022 < 0.0018 <0.0022 <0.0015 Ce-144 < 0.0036 < 0.0044 < 0.0044 < 0.0037 <0.0044 <0.0034 M-2 Lab Code MAP- 1832 MAP- 3821 MAP- 5657 MAP- 7160 3

Volume(m ) 4072 4319 4003 4030 Be-7 0.079 +/- 0.015 0.095 +/- 0.016 0.071 +/- 0.017 0.048 +/- 0.015 0.073 0.068 Mn-54 < 0.0010 < 0.0010 < 0.0009 < 0.0009 <0.0010 <0.0008 Co-58 < 0.0009 < 0.0005 < 0.0007 < 0.0011 <0.0009 <0.0008 Co-60 < 0.0008 < 0.0005 < 0.0009 < 0.0007 <0.0009 <0.0007 Zn-65 < 0.0007 < 0.0020 < 0.0012 < 0.0007 <0.0020 <0.0017 Zr-Nb-95 < 0.0013 < 0.0012 < 0.0011 < 0.0015 <0.0013 <0.0011 Ru-103 < 0.0008 < 0.0011 < 0.0012 < 0.0012 <0.0012 <0.0012 Ru-106 < 0.0080 < 0.0081 < 0.0043 < 0.0059 <0.0081 <0.0085 Cs-134 < 0.0008 < 0.0011 < 0.0009 < 0.0009 <0.0011 <0.0009 Cs-137 < 0.0009 < 0.0006 < 0.0007 < 0.0004 <0.0009 <0.0010 Ba-La-140 < 0.0027 < 0.0029 < 0.0046 < 0.0021 <0.0046 <0.0024 Ce-141 < 0.0019 < 0.0022 < 0.0018 < 0.0022 <0.0022 <0.0018 Ce-144 < 0.0046 < 0.0047 < 0.0047 < 0.0038 <0.0047 <0.0046 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- 1833 MAP- 3822 MAP- 5658 MAP- 7161 3

Volume(m ) 4119 4453 4633 3936 Be-7 0.078 +/- 0.016 0.095 +/- 0.013 0.077 +/- 0.016 0.071 +/- 0.016 0.081 0.067 Mn-54 < 0.0005 < 0.0006 < 0.0007 < 0.0006 <0.0007 <0.0007 Co-58 < 0.0008 < 0.0007 < 0.0008 < 0.0008 <0.0008 <0.0006 Co-60 < 0.0007 < 0.0005 < 0.0008 < 0.0008 <0.0008 <0.0006 Zn-65 < 0.0018 < 0.0012 < 0.0006 < 0.0014 <0.0018 <0.0014 Zr-Nb-95 < 0.0008 < 0.0008 < 0.0012 < 0.0010 <0.0012 <0.0010 Ru-103 < 0.0012 < 0.0008 < 0.0007 < 0.0012 <0.0012 <0.0009 Ru-106 < 0.0053 < 0.0048 < 0.0064 < 0.0075 <0.0064 <0.0061 Cs-134 < 0.0007 < 0.0006 < 0.0008 < 0.0010 <0.0008 <0.0007 Cs-137 < 0.0005 < 0.0004 < 0.0006 < 0.0007 <0.0006 <0.0006 Ba-La-140 < 0.0040 < 0.0036 < 0.0044 < 0.0020 <0.0044 <0.0018 Ce-141 < 0.0020 < 0.0013 < 0.0016 < 0.0013 <0.0020 <0.0013 Ce-144 < 0.0034 < 0.0022 < 0.0041 < 0.0044 <0.0041 <0.0035 M-4 a

Lab Code MAP- 1834 MAP- 3823 MAP- 5659 MAP- 7162 3

Volume(m ) 4297 4969 4840 4419 Be-7 0.071 +/- 0.015 0.10 +/- 0.016 0.078 +/- 0.014 0.051 +/- 0.011 0.075 0.070 Mn-54 < 0.0009 < 0.0006 < 0.0010 < 0.0006 <0.0010 <0.0008 Co-58 < 0.0005 < 0.0006 < 0.0006 < 0.0008 <0.0006 <0.0008 Co-60 < 0.0003 < 0.0003 < 0.0006 < 0.0006 <0.0006 <0.0008 Zn-65 < 0.0017 < 0.0015 < 0.0023 < 0.0010 <0.0023 <0.0019 Zr-Nb-95 < 0.0014 < 0.0006 < 0.0018 < 0.0012 <0.0018 <0.0014 Ru-103 < 0.0014 < 0.0009 < 0.0010 < 0.0009 <0.0014 <0.0013 Ru-106 < 0.0069 < 0.0060 < 0.0061 < 0.0078 <0.0069 <0.0073 Cs-134 < 0.0009 < 0.0007 < 0.0009 < 0.0008 <0.0009 <0.0010 Cs-137 < 0.0005 < 0.0003 < 0.0007 < 0.0008 <0.0007 <0.0010 Ba-La-140 < 0.0033 < 0.0030 < 0.0041 < 0.0018 <0.0041 <0.0026 Ce-141 < 0.0020 < 0.0016 < 0.0019 < 0.0018 <0.0020 <0.0013 Ce-144 < 0.0039 < 0.0027 < 0.0031 < 0.0047 <0.0039 <0.0040 a

No sample for week of 9/14/16 ; see Table 2.0, Listing of Missed Samples.

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- 1835 MAP- 3824 MAP- 5660 MAP- 7163 3

Volume(m ) 4427 4298 3843 4322 Be-7 0.066 +/- 0.012 0.091 +/- 0.020 0.086 +/- 0.019 0.050 +/- 0.010 0.073 0.073 Mn-54 < 0.0008 < 0.0008 < 0.0009 < 0.0004 <0.0009 <0.0008 Co-58 < 0.0007 < 0.0012 < 0.0011 < 0.0004 <0.0012 <0.0007 Co-60 < 0.0004 < 0.0008 < 0.0009 < 0.0003 <0.0009 <0.0005 Zn-65 < 0.0003 < 0.0019 < 0.0011 < 0.0004 <0.0019 <0.0009 Zr-Nb-95 < 0.0007 < 0.0017 < 0.0012 < 0.0009 <0.0017 <0.0014 Ru-103 < 0.0009 < 0.0018 < 0.0013 < 0.0006 <0.0018 <0.0012 Ru-106 < 0.0057 < 0.0045 < 0.0079 < 0.0060 <0.0079 <0.0072 Cs-134 < 0.0006 < 0.0011 < 0.0009 < 0.0006 <0.0011 <0.0009 Cs-137 < 0.0004 < 0.0008 < 0.0008 < 0.0005 <0.0008 <0.0007 Ba-La-140 < 0.0017 < 0.0018 < 0.0045 < 0.0014 <0.0045 <0.0023 Ce-141 < 0.0013 < 0.0021 < 0.0023 < 0.0014 <0.0023 <0.0020 Ce-144 < 0.0036 < 0.0053 < 0.0029 < 0.0024 <0.0053 <0.0041 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 07-13-16 08-10-16 09-08-16 Lab Code MVE- 3541 MVE- 4244 MVE- 4763 Mn-54 < 0.005 < 0.009 < 0.010 < 0.010 < 0.010 Fe-59 < 0.009 < 0.017 < 0.028 < 0.028 < 0.031 Co-58 < 0.004 < 0.009 < 0.008 < 0.009 < 0.009 Co-60 < 0.005 < 0.004 < 0.006 < 0.006 < 0.009 Zn-65 < 0.010 < 0.013 < 0.020 < 0.020 < 0.024 Nb-95 < 0.006 < 0.012 < 0.010 < 0.012 < 0.011 I-131 < 0.015 < 0.022 < 0.054 < 0.054 < 0.038 Cs-134 < 0.004 < 0.011 < 0.009 < 0.011 < 0.011 Cs-137 < 0.005 < 0.010 < 0.009 < 0.010 < 0.011 Location: M-42 (Biology Station Road)

Date Collected 07-13-16 08-10-16 09-08-16 Lab Code MVE- 3542 MVE- 4246 MVE- 4764 Mn-54 < 0.002 < 0.008 < 0.011 < 0.011 < 0.008 Fe-59 < 0.010 < 0.022 < 0.022 < 0.022 < 0.022 Co-58 < 0.004 < 0.004 < 0.009 < 0.009 < 0.008 Co-60 < 0.004 < 0.005 < 0.008 < 0.008 < 0.008 Zn-65 < 0.006 < 0.024 < 0.016 < 0.024 < 0.024 Nb-95 < 0.005 < 0.013 < 0.008 < 0.013 < 0.012 I-131 < 0.010 < 0.026 < 0.043 < 0.043 < 0.030 Cs-134 < 0.004 < 0.012 < 0.009 < 0.012 < 0.011 Cs-137 < 0.005 < 0.008 < 0.013 < 0.013 < 0.010 Location: M-43 (Imholte Farm, Control)

Date Collected 07-13-16 08-10-16 09-08-16 Lab Code MVE- 3544 MVE- 4247 MVE- 4765 Mn-54 < 0.003 < 0.008 < 0.008 < 0.008 < 0.012 Fe-59 < 0.008 < 0.017 < 0.018 < 0.018 < 0.030 Co-58 < 0.003 < 0.009 < 0.009 < 0.009 < 0.013 Co-60 < 0.002 < 0.005 < 0.007 < 0.007 < 0.014 Zn-65 < 0.008 < 0.012 < 0.020 < 0.020 < 0.029 Nb-95 < 0.005 < 0.013 < 0.011 < 0.013 < 0.015 I-131 < 0.014 < 0.026 < 0.034 < 0.034 < 0.037 Cs-134 < 0.003 < 0.013 < 0.009 < 0.013 < 0.014 Cs-137 < 0.003 < 0.014 < 0.011 < 0.014 < 0.013 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) b Period Collected January February March April May a a Lab Code NS NS MSW-1792 MSW-2378 MSW-3112 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 - - < 12 < 23 < 27 Period Collected June July August September October Lab Code MSW-3549 MSW-4274 MSW-4638 MSW-5375 MSW-6401 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 <7 < 26 < 31 < 28 < 23 Previous c

Period Collected November December Cumulative Annual Lab Code MSW-6790 MSW-7080 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 < 28 < 10 < 31 < 39 a

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

b No sample for 03-02-16; Water frozen.

c No sample for 12-07-16; Water 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-520 MSW-1190 MSW-1793 MSW-2379 MSW-3113 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 < 28 <7 < 12 < 18 < 32 Period Collected June July August September October Lab Code MSW-3550 MSW-4275 MSW-4640 MSW-5376 MSW-6402 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 < 10 < 25 < 22 < 24 < 12 Previous Period Collected November December Cumulative Annual Lab Code MSW-6791 MSW-7081 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 < 35 < 17 < 35 < 33 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-519 MDW-1099 MDW-1461 MDW-2227 MDW-2933 Gross beta 1.2 +/- 0.6 2.4 +/- 1.0 2.5 +/- 1.0 3.1 +/- 1.0 2.6 +/- 1.0 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 < 18 < 27 < 23 < 25 < 23 Period Collected June July August September October Lab Code MDW-3451 MDW-4180 MDW-4761 MDW-5377 MDW-6245 Gross beta 2.3 +/- 0.7 2.7 +/- 1.1 3.2 +/- 0.7 3.1 +/- 0.8 3.1 +/- 1.1 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 < 18 < 19 < 17 < 23 < 28 Period Collected November December Cumulative Previous Lab Code MDW-6664 MDW-7010 Average Average Gross beta 2.3 +/- 0.9 2.5 +/- 0.8 2.6 2.3 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 < 25 < 22 < 28 < 35 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) 1st Quartera MSW - 1794 < 500 < 149 2nd Quarter MSW - 3601 < 500 < 143 3rd Quarter MSW - 5381 < 500 < 152 4th Quarterb MSW - 7087 < 500 < 155 Cumulative Average < 500 < 150 Previous Annual Average < 500 < 151 River Water Downstream, M-9 1st Quarter MSW - 1795 < 500 < 149 2nd Quarter MSW - 3602 < 500 < 143 3rd Quarter MSW - 5382 < 500 < 152 4th Quarter MSW - 7088 < 500 < 155 Cumulative Average < 500 < 150 Previous Annual Average < 500 < 151 Drinking Water Minneapolis, M-14 1st Quarter MDW - 1796 < 500 < 149 2nd Quarter MDW - 3603 < 500 < 143 3rd Quarter MDW - 5383 < 500 < 152 4th Quarter MDW - 7089 < 500 < 155 Cumulative Average < 500 < 150 Previous Annual Average < 500 < 151 a

Water frozen January, February and 03-02-16.

b Last collection for quarter on 12-07-16; water frozen remainder of December.

12-1

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

Sample Description and Concentration (pCi/L)

Mn-54 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 Ce-144 Date H-3 Fe-59 Co-58 Co-60 Zn-65 Collected Lab Code (< 500 pCi/L)

Monticello (M-11) 1/20/2016 MWW-252 338 < 140 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 29 4/20/2016 MWW-252 1870 < 149 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 14 7/20/2016 MWW-252 3858 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 29 10/19/2016 MWW-252 5728 < 156 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 28 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 29 Plant Well No. 1 (M-12) 1/20/2016 MWW-252 339 < 140 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 21 4/21/2016 MWW-252 1871 < 149 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 23 7/20/2016 MWW-252 3859 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 17 10/19/2016 MWW-252 5729 < 156 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 26 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 26 Hasbrouck (M-55) 1/20/2016 MWW-252 340 < 140 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 4/20/2016 MWW-252 1874 < 149 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 10 7/20/2016 MWW-252 3861 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 21 10/19/2016 MWW-252 5731 < 156 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 20 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 Imholte (M-43C) 1/20/2016 MWW-252 341 < 140 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 24 4/20/2016 MWW-252 1873 < 149 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 7/20/2016 MWW-252 3860 < 151 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 21 10/19/2016 MWW-252 5730 < 156 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 19 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 24 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)

Redhorse Date Collected 05-24-16 05-24-16 09-20-16 09-20-16 Lab Code MF- 2618 MF- 2619 MF- 4954 MF- 4955 Sample Type Smallmouth Shorthead Smallmouth Shorthead Bass Redhorse Bass Redhorse K-40 3.44 +/- 0.39 3.97 +/- 0.62 2.86 +/- 0.41 2.86 +/- 0.394 Mn-54 < 0.015 < 0.025 < 0.017 < 0.015 Fe-59 < 0.041 < 0.070 < 0.046 < 0.048 Co-58 < 0.019 < 0.024 < 0.018 < 0.017 Co-60 < 0.007 < 0.017 < 0.010 < 0.016 Zn-65 < 0.034 < 0.070 < 0.020 < 0.029 Nb-95 < 0.017 < 0.037 < 0.019 < 0.024 Zr-95 < 0.033 < 0.053 < 0.019 < 0.035 Cs-134 < 0.015 < 0.025 < 0.016 < 0.016 Cs-137 < 0.015 < 0.025 < 0.013 < 0.016 Ba-La-140 < 0.058 < 0.112 < 0.047 < 0.039 Ce-144 < 0.099 < 0.158 < 0.104 < 0.137 Cumulative Previous Average Average K-40 3.28 3.31 Mn-54 < 0.025 < 0.017 Fe-59 < 0.070 < 0.056 Co-58 < 0.024 < 0.019 Co-60 < 0.017 < 0.018 Zn-65 < 0.070 < 0.033 Nb-95 < 0.037 < 0.031 Zr-95 < 0.053 < 0.043 Cs-134 < 0.025 < 0.020 Cs-137 < 0.025 < 0.018 Ba-La-140 < 0.112 < 0.073 Ce-144 < 0.158 < 0.130 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 05-24-16 05-24-16 09-20-16 09-20-16 Lab Code MF- 2620 MF- 2621 MF- 4957 MF- 4958 Sample Type Shorthead Smallmouth Smallmouth Shorthead Redhorse Bass Bass Redhorse K-40 3.16 +/- 0.44 3.37 +/- 0.36 3.01 +/- 0.44 3.86 +/- 0.47 Mn-54 < 0.015 < 0.012 < 0.016 < 0.015 Fe-59 < 0.043 < 0.048 < 0.053 < 0.047 Co-58 < 0.017 < 0.015 < 0.014 < 0.030 Co-60 < 0.017 < 0.010 < 0.015 < 0.012 Zn-65 < 0.022 < 0.018 < 0.025 < 0.033 Nb-95 < 0.022 < 0.029 < 0.017 < 0.034 Zr-95 < 0.039 < 0.027 < 0.048 < 0.036 Cs-134 < 0.014 < 0.013 < 0.018 < 0.021 Cs-137 < 0.017 < 0.014 < 0.015 < 0.015 Ba-La-140 < 0.083 < 0.081 < 0.043 < 0.055 Ce-144 < 0.098 < 0.102 < 0.145 < 0.137 Cumulative Previous Average Average K-40 3.35 3.39 Mn-54 < 0.016 < 0.025 Fe-59 < 0.053 < 0.046 Co-58 < 0.030 < 0.025 Co-60 < 0.017 < 0.025 Zn-65 < 0.033 < 0.070 Nb-95 < 0.029 < 0.030 Zr-95 < 0.048 < 0.058 Cs-134 < 0.021 < 0.025 Cs-137 < 0.017 < 0.020 Ba-La-140 < 0.083 < 0.122 Ce-144 < 0.145 < 0.141 14-2

MNGP Table 15. Algae or aquatic insects, 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 Lab Code NSa Be-7 K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Ru-103 Ru-106 Cs-134 Cs-137 Ba-La-140 Ce-144 Downstream 1000' M-9 Date Collected Lab Code NSa Be-7 K-40 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Ru-103 Ru-106 Cs-134 Cs-137 Ba-La-140 Ce-144 a NS - No Sample. Refer to Section 20 table "listing of missed samples".

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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 11-09-16 Lab Code MSS- 6314 Be-7 < 0.26 < 0.26 < 0.29 K-40 9.90 +/- 0.49 9.90 11.55 Mn-54 < 0.016 < 0.016 < 0.017 Fe-59 < 0.043 < 0.043 < 0.073 Co-58 < 0.020 < 0.020 < 0.022 Co-60 < 0.015 < 0.015 < 0.016 Zn-65 < 0.037 < 0.037 < 0.044 Nb-95 < 0.023 < 0.023 < 0.035 Zr-95 < 0.047 < 0.047 < 0.048 Ru-103 < 0.030 < 0.030 < 0.039 Ru-106 < 0.13 < 0.13 < 0.13 Cs-134 < 0.012 < 0.012 < 0.014 Cs-137 < 0.017 < 0.017 < 0.017 Ba-La-140 < 0.092 < 0.09 < 0.21 Ce-144 < 0.083 < 0.08 < 0.12 Downstream 1000' M-9 Date Collected 11-09-16 Lab Code MSS- 6315 Be-7 < 0.18 < 0.18 < 0.30 K-40 10.28 +/- 0.51 10.28 10.46 Mn-54 < 0.014 < 0.014 < 0.018 Fe-59 < 0.054 < 0.054 < 0.076 Co-58 < 0.023 < 0.023 < 0.026 Co-60 < 0.013 < 0.013 < 0.017 Zn-65 < 0.031 < 0.031 < 0.039 Nb-95 < 0.032 < 0.032 < 0.051 Zr-95 < 0.023 < 0.023 < 0.052 Ru-103 < 0.025 < 0.025 < 0.036 Ru-106 < 0.12 < 0.12 < 0.12 Cs-134 < 0.010 < 0.010 < 0.017 Cs-137 0.030 +/- 0.018 0.030 0.029 Ba-La-140 < 0.12 < 0.12 < 0.14 Ce-144 < 0.11 < 0.11 < 0.13 No Spring 16 sample. Refer to Section 20 table "listing of missed samples".

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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 11-09-16 Lab Code MSS- 6316 Be-7 < 0.28 < 0.28 < 0.33 K-40 10.27 +/- 0.55 10.27 10.01 Mn-54 < 0.017 < 0.017 < 0.021 Fe-59 < 0.046 < 0.046 < 0.068 Co-58 < 0.020 < 0.020 < 0.022 Co-60 < 0.008 < 0.008 < 0.014 Zn-65 < 0.044 < 0.044 < 0.041 Nb-95 < 0.020 < 0.020 < 0.031 Zr-95 < 0.025 < 0.025 < 0.046 Ru-103 < 0.018 < 0.018 < 0.041 Ru-106 < 0.16 < 0.16 < 0.13 Cs-134 < 0.014 < 0.014 < 0.016 Cs-137 < 0.019 < 0.019 < 0.021 Ba-La-140 < 0.10 < 0.10 < 0.20 Ce-144 < 0.12 < 0.12 < 0.11 No Spring 16 sample. Refer to Section 20 table "listing of missed samples".

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