Text

2014 Annual Radiological Environmental Operating Report
	ML15132A628
Person / Time
Site:	Monticello
Issue date:	05/12/2015
From:	Gardner P; Northern States Power Co, Xcel Energy
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	L-MT-15-036
	Download: ML15132A628 (101)
	v • d • e

Monticello Nuclear Generating Plant (l Xcel Energy* 2807 W County Road 75 Monticello, MN 55362 May1 2, 201 5 L-MT-1 5-036 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Monticello Nuclear Generating Plant Docket 50-263 Renewed Facility Operating License No . DPR-22 2014 Annual Radiological Environmental Operating Report Pursuant to 10 CFR 50, Appendix I, Section IV.B.2, IV.B.3, IV.C and, in accordance with Monticello Nuclear Generating Plant (MNGP) Technical Specifications 5.6.1, the Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy, is submitting the Annual Radiological Environmental Operating Report, "Radiological Environmental Monitoring Programs," for year 2014.

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

Peter A. Gardner Site Vice President, 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, 2014 99 pages follow

..f. All Eryvironme.ntal, Inc.

~.l{ /'"\1 Mtdwest Laboratory 700 Landwehr Road* Northbrook, /L 60062-2310 phone (847) 564-0700 *fax (847) 504-4517 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, 2014 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 Preface *................................................................................................................................ ii List ofTables ....................................................................................................................... iv List of Figures ..................................................................................................................... v

1.0 INTRODUCTION

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

SUMMARY

.......................................................................................................................... 2 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP) ...................... 3 3.1 Program Design and Data Interpretation .............................................................. 3 3.2 Program Description ............................................................................................. 4 3.3 Program Execution ................................................................................................. 5 3.4 Program Modifications ........................................................................................... 5 3.5 Laboratory Procedures .......................................................................................... 6 3.6 Land Use Census .................................................................................................. 6 4.0 RESULTS AND DISCUSSION ........................................................................................... 7 4.1 Atmospheric Nuclear Detonations and Nuclear Accidents ................................... 7 4.2 Summary of Preoperational Data .......................................................................... 7 4.3 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 E Ground Water Monitoring Well Samples .......................................................................... E-1 iii

LIST OF TABLES 5.1 Sample Collection and Analysis Program ...................................................................... 13 5.2 Samplin*g 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 Appendix E E-1 Sample Collection and Analysis Program, Ground Water, ............................................. E-6 E-2 Sampling Locations for Ground Water Monitoring Wells ................... :............................ E-6 E-3 Ground Water Monitoring Program Summary ............. ;.................................................. E-7 E-4 Results of Analyses, Ground Water Monitoring Program ............................................... E-9 iv

LIST OF FIGURES No.

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, Milk sampling locations ............................................................................................................D-5 D-5 Sample collection* and analysis program: Radiation Environmental Monitoring Program, Sludge, Ground water and Shoreline sampling locations ........................................................ D-6 Appendix E E-1 Sample collection and analysis program:

Ground water, On-site monitoring well locations ..................................................................... E-8 v

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, 2014.

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 not included in this report. These data are included in a reference document (Environmental, Inc., Midwest Laboratory, 2014a) available at the Monticello Nuclear Generating Plant, Chemistry and Radiation Protection Department.

The Monticello Nuclear Generating Plant is a boiling water reactor with a nominal generating capacity of 670 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.

2.0

SUMMARY

The Radiological EnvironmentaL Monitoring Program (REMP) required by the U.S. Nuclear Regulatory Commission (NRC) Technical Specifications and the Offsite Dose Calculation Manual (ODCM) for the Monticello Nuclear Generating Plant is described. Results for the year 2014 are summarized and discussed.

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

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

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 Plant's 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-

?, and potassium-40. The first three gamma-emitting isotopes were selected as radiological impact indicators becawse 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-? 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 plant's 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 Plant's Monitoring Program can be related to those obtained in other parts of the world. Finally, results can be related to events known to cause elevated levels of radiation in the environment, e.g., atmospheric nuclear detonations.

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3.2 Program Description The sampling _and analysis schedule for the Radiological Environmental Monitoring Program (REMP) at the Monticeno Plant is summarized in Table 5.1 and bi"iefly 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. 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 indicator~ (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 CaS0 4 :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, pasture grass and vegetation are collected from locations M-41, M-42 and M-43 (C). The samples are analyzed for iodine-131 and other gamma emitting isotopes.

Vegetables, 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.

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

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 dowrstream collections of fish, invertebrates, and shoreline sediments. Shoreline sediment is also collected from one downstream recreational location. All samples are analyzed for gamma-emitting isotopes.

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

(1) Air Particulates I Air Iodine:

M-01, No air particulate I air iodine sample was available from for the week ending May 14, 2014, the sampler the sampler was found off due to a tripped GFCI.

M-05, No air particulate for the week ending May 28, 2014, due to the filter paper shifting within the sample holder.

M-01, No air particulate I air iodine sample was available from for the week ending August 27, 2014, the sampler the sampler was found off due to a tripped GFCI.

(2) Surface Water:

Surface water was not collected at location M-08 for the months of January, February, March, and December, 2014, or for the weeks of 11119114 and 11126114 due to unsafe ice conditions.

(3) Well Water:

Well water was not collected at location MW-27 in January, 2014. No water was available from the outside tap.

TLD samples were found missing for the first quarter at location M-1-08 and for the fourth quarter at location M-2-C.

(5) Invertebrates:

Water conditions did not allow collection at location M-08 for Fall2014.

Deviations from the program are summarized in Table 5.3.

3.4 Program Modifications Milk sampling was dropped from the REMP in 2013. The indicator location M-16 discontinued dairy operations.

Modifications to the Groundwater monitoring program are detailed in Appendix E.

Broad Leaf Vegetable sampling was removed from the REMP program in 2014. This requirement specified 1-131 analysis of one broad leaf vegetable from the highest DIQ garden and had been unobtainable since 2011. This requirement was above and beyond the guidance in NUREG 1302 and was removed in ODCM-07.01, Revision 23.

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3.5 Laboratory Procedures The iodine-131 analyses in milk and 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.

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 (Environmental, Inc., Midwest Laboratory, 2012). The QA Program includes participation in Interlaboratory Comparison (crosscheck) Programs. Results obtained in the crosscheck programs are presented in Appendix A.

3.6 Land Use Census In accordance with the MNGP Chemistry Manual, Procedure 1.05.41, "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, 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 distance of 5 iniles. The census shall also identify the locations of all milk animals and all 500 ft 2 or greater gardens 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 2014 land use census was conducted between September 15 and September 24, 2014.

This is the second year using improved GPS software. The GPS software more accurately plots the distance and direction of identified locations. This improved GPS software resulted in slight changes to distance and directional values. There were three sectors in which the highest D/Q values increased by greater than 20%. The highest D/Q value for gardens in three sectors changed due to a closer residence planting a garden in 2014 where there was no garden in 2013.

There were no sectors where the highest D/Q values for the nearest residence changed 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.

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

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

4.1 Atmospheric Nuclear Detonations and Nuclear Accidents There were no reported accidents involving significant release to the environment at nuclear reactor facilities in 2014. The Fukushima Daiichi nuclear accident occurred March 11, 2011.

There were no reported atmospheric nuclear tests in 2014. The last reported test was conducted on October 16, 1980 by the People's Republic of China.

4.2 Summary of Preoperational Data The following constitutes a summary of preoperational studies conducted at the Monticello Nuclear Generating Plant during the years 1968 to 1970, to determine background levels expected in the environment, and provided, where applicable, as a means for comparison with present day levels. Strict comparisons, however, are difficult to make, since background levels of radiation were much higher in these years due to radioactive fallout from the atmosphere. Gross 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 0.1 0 pCi/g for both upstream and downstream samples. Low levels of Cs-137, occasionally observed today can still be attributed to residual activity from atmospheric fallout. Gross beta levels in fish flesh averaged 5.3 pCi/g in 1968 and 1969. Cs-137, measured in 1969 and 1970, averaged 0.044 pCi/g. Gross beta background levels, in 1970, for aquatic vegetation, algae, and periphyton samples measured 86.7 pCi/g, 76.5 pCi/g, and 28.1 pCi/g respectively.

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4.3 Program Findings Results obtained show background levels of radioactivity in environmental samples collected outside of the Site Protected Area in 2014. The trace levels of strontium-90 and cesium-137, still measurable in soil and sediment samples, are generally attributed to deposition of fallout from previous decades.

Tritium was identified in some groundwater samples collected within the site Protected Area.

Ambient Radiation (TLD's)

Ambient radiation was measured in the general area of the site boundary, 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 (13.5 and 12.9 mRem/91 days, respectively). The mean for special interest locations was 13.2 mRem/91 days and the mean for the control locations was 14.3 mRem/91 days. Dose rates measured at the inner and outer ring locations were similar to those observed from 1999 through 2014 and are tabulated below. No plant effect on ambient gamma radiation is indicated (Figure 5-1).

Year Inner Rinq Outer Rinq 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 Ambient gamma radiation as measured by thermoluminescent dosimetry.

Average quarterly dose rates, Inner vs. Outer Ring locations 8

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

both indicator and control locations (0.027 and 0.028 pCi/m ,respectively), similar to levels observed from 1998 through 2012. The results are tabulated below.

Year Indicators Control 3

Concentration (oCi/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

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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 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 2014.

Gamma spectroscopic analysis of quarterly composites of air particulate filters yielded similar results for indicator and control locations. Beryllium-?, which is produced continuously in the upper atmosphere by cosmic radiation (Arnold and AI-Salih, 1955) was detected in all samples, 3

with an average activity of 0.065 pCi/m for all 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/m 3 in all samples.

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River Water and Drinking Water Tritium activity measured below 500 pCi/L in all samples. Gross beta activity in Minneapolis drinking water averaged 2.8 pCi/L and was similar to average levels observed from 1998 through 2012. Gross beta averages are tabulated below. *

Year Gross Beta (pCi/L) Year Gross Beta (pCi/L) 1999 2.2 2007 2.8 2000 2.5 2008 2.1 2001 2.5 2009 2.3 2002 2.9 2010 2.9 2003 3.0 2011 2.2 2004 2.7 2012 2.4 2005 2.8 2013 2.6 2006 2.1 2014 2.8 Average annual concentrations; Gross beta in drinking water.

Comparisons with data reported by the USEPA for Minneapolis drinking water samples collected from 1980 through 2005 indicate that concentrations of these nuclides are remaining fairly constant. Gamma-emitting isotopes were below detection limits in all surface water samples.

There was no indication of a plant effect.

Well Water At the four indicator and control locations, tritium measured below 500 pCi/L for all samples.

Gamma isotopic results were below detection limits.

The data for 2014 were consistent with previous year's results and no plant operational effects were indicated.

Pasture Grass Pasture grass was collected in July, August and September, 2014. lodine-131 concentrations measured below 0.038 pCi/g wet weight in all samples. With the exceptions of naturally-occurring*

beryllium-? and potassium-40, no other gamma-emitting isotopes were detected.

A vegetation collection was not required for 2014. No crops, within five miles of the plant, were found using irrigatiOn water from the Mississippi River.

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Fish were collected in June and September. Flesh was separated from the bones and analyzed by gamma spectroscopy. Only naturally-occurring potas~ium-40 was found in the upstream and downstream samples (2.71 and 2.76 pCi/g wet weight, respectively). Other gamma-emitting isotopes remained below detection limits. There was no indication of a plant effect.

Invertebrates Samples were collected in August and October, 2014, and analyzed by gamma spectroscopy. All gamma-emitting isotopes, with the exception of naturally-occurring potassium-40 were below detection limits. There was no indication of any plant effect.

Shoreline Sediments Upstream, downstream and downstream recreational area shoreline sediment collections were made in August and October, 2014, and analyzed for gamma-emitting isotopes. Low levels of cesium-137 were detected in two downstream samples (M-15), at an average concentration of 0.0047 pCi/g dry weight. Low levels of cesium-137 were also detected at one of the two control samples at a concentration of 0.028 pCi/gdry as well as at one of the two recreation area samples at a concentration of 0.059 pC/gdry. Similar levels of activity and distribution have been observed since 1978, and are indicative of the influence of fallout deposition. Naturally-occurring beryllium-?

and potassium-40 were also detected. There was no indication of a plant effect.

Ground Water Monitoring Program Monitoring Wells (on-site)

Measurable tritium above 500 pCi/L was detected in 15 of 118 samples collected from the nineteen on-site monitoring wells. The activities ranged from 505 to 5,911 pCi/L, Which is a decline from the level observed in 2013. The highest activities were observed at well MW-09A.

Gamma isotopic measurements were below detection limits.

Stormwater Run-off (on-site)

Measureable tritium above 500 pCi//Lwas detected at one of the four stormwater runoff samples submitted for analysis in 2014. Gamma isotopic analysis results measured below detection limits.

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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 Medium No. Codes (and Type) a Frequency b Frequency c Ambient radiation 40 M-01A- M-14A, M-01 B- M-168 C/Q Ambient gamma (TLDs) M-01 S - M-06S, M-01 C - M-04C Airborne Particulates 5 M-1 (C), M-2, M-3, M-4, M-5 CIW GB, GS (QC of each location)

Airborne Iodine 5 M-1 (C), M-2, M-3, M-4, M-5 CIW 1-131 Pasture grass, Vegetation d 3 M-41, M-42, M-43(C) 3x/year GS Surface water 2 M-B(C), M-9 GIW GS(MC), H-3(QC)

I Drinking water M-14 GIW GB(MC), 1-131 (MC)

GS (MC), H-3 (QC)

Well water 4 M-11, M-12, M-27, M-43(C) G/Q H-3, GS On-site monitoring wells 5 M-36 to M-40 G/Q H-3, GS 19 M-33 to M-35, M-44 toM-54 G/M H-3, GS Edible cultivated crops * -

Corn M-19 G/A GS Potatoes M-21 G/A GS Fish 2 M-B(C), M-9 GIS A GS (two species, edible portion)

Periphyton or invertebrates 2 M-B(C), M-9 G/SA GS Shoreline sediment 3 M-B(C), M-9, M-15 G/SA GS

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: Cl = continuous, G/ = grab. Collection frequency is coded as follows:

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

I c Analysis type is coded as follows: GB =gross beta, GS =gamma spectroscopy, H-3 =tritium, 1-131 = iodine-131.

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

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

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

13

Table 5.2. Sampling locations, Monticello Nuclear Generating Plant.

Distance and Code Type a Collection Site Sample Type b Direction 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, 80, F < 1000' upstream M-9 Downstream of Plant Discharge SW, SS, 80, 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 ow 37.0 mi@ 132°/SE M-15 Montissippi Park ss 1.27 mi@ 114°/ESE M-19 River Irrigated Corn Field c VE M-21 River Irrigated Potato Field c VE M-27 Wise residence c VE,WW 0.64 mi@ 207"/SSW M-33 Monitoring Well #1 ww 593'@ 299°/WNW M-34 Monitoring Well #2 ww 749'@ 301°/WNW M-35 Monitoring Well #3 ww 770'@ 305°/NW M-36 Monitoring Well #4 ww 0.1 mi@ 25°/NNE M-37 Monitoring Well #5 ww 0.1 mi@ 253°/WSW M-38 Monitoring Well #6 ww 229'@ 228°/SW M-39 Monitoring Well #7 ww 0.2 mi@ 66°/ENE M-40 Monitoring Well #8 ww 0.3 mi@ 150°/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 lmholte Farm VE,WW 12.3 mi@ 313°/NW M-44 Monitoring Well #9 ww 0.1 mi@ 310°/NW M-45 Monitoring Well #1 0 ww 0.1 mi@ 292°/WNW M-46 Monitoring Well #11 ww 0.1 mi@ 283°/WNW M-47 Monitoring Well #12A ww 0.1 mi@ 330°/NW M-48 Monitoring Well #128 ww 0.1 mi@ 326°/NW M-49 Monitoring Well #13A ww 0.12 mi@ 316°/NW M-50 Monitoring Well #138 ww 0.12 mi@ 316°/NW M-51 Monitoring Well #98 ww 0.1 mi@ 310°/NW M-52 Monitoring Well #14 ww 0.17 mi@ 306°/NW M-53 Monitoring Well #15A ww 751'@ 14°/NNE M-54 Monitoring Well #158 ww 750'@ 14°/NNE Storm water Runoff 0.1 mi @ 27"/NE 14

Table 5.2. Sampling locations, Monticello Nuclear Generating Plant.

Distance and Code 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 County Road 75 TLD 0.47 mi@ 158°/SSE M-OBA County Road 75 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@ 229°/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 Sherco #1 Air Station 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 4.3mi@117"/ESE M-07B Monte 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-128 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 Type" 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-OSS Rivercrest Christian Academy TLD 3.0 mi@ 118./ESE M-06S Monte Public Works TLD 2.6 mi@ 134./SE M-01C c Kirchenbauer Farm TLD 11.5 mi@ 323./NW M-02C c County Roads 4 and 15 TLD 11.2mi@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 Protected Area ISFSI-1 ISFSI-1 (neutron) and 1-01 (gamma) TLD NE corner of ISFSI ISFSI-2 ISFSI-2 (neutron) and 1-02 (gamma) TLD North side of ISFSI, center ISFSI-3 ISFSI-3 (neutron) and 1-03 (gamma) TLD NW corner of ISFSI ISFSI-4 ISFSI-4 (neutron) and 1-04 (gamma) TLD West side of ISFSI, middle ISFSI-5 ISFSI-5 (neutron) and 1-05 (gamma) TLD West side of ISFSI, at center of array

~

ISFSI-6 ISFSI-6 (neutron) and 1-06 (gamma) TLD SW corner of ISFSI ISFSI-7 ISFSI-7 (neutron) and 1-07 (gamma) TLD South side of ISFSI, center ISFSI-8 ISFSI-8 (neutron) and 1-08 (gamma) TLD SE corner of ISFSI ISFSI-9 ISFSI-9 (neutron) and 1-09 (gamma) TLD East side of ISFSI, at center of array ISFSI-10 ISFSI-1 0 (neutron) and 1-10 (gamma) TLD East side of ISFSI, middle ISFSI-11 ISFSI-11 (neutron) and 1-11 (gamma) TLD OCA fence south, on exit road ISFSI-12 ISFSI-12 (neutron) and 1-12 (gamma) TLD OCA fence middle, on exit road ISFSI-13 ISFSI~13 (neutron) and 1-13 (gamma) TLD OCA fence north, on exit road ISFSI-14 ISFSI-14 (neutron) TLD Posted with TLD M12A ISFSI-15 ISFSI-15 (neutron) TLD Posted with TLD M1 OA ISFSI-16 ISFSI-16 (neutron) TLD Posted with TLD .M02S Neutron Control A c TLD Posted with TLD M03C Neutron Control B c TLD Posted with TLD M04C Neutron Control C c TLD Posted with TLD M02C Neutron Control D c TLD Posted with TLD M01 C,.r

"C" denotes control location. All other locations are indicators.

o 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 OW Drinking Water VE Vegetation I vegetables WW WeliWater 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 conducting REMP Plans for Preventing Type Period as required Recurrence sw Gamma M-008 January '14 Water frozen entire month; None Required no composite.

Removed from program.

ww Gamma, H-3 M-02? 1/15/2014 Residence vacant Added New Location (Hasbrouck Residence) sw Gamma M-008 February '14 Water frozen entire month; None Required no composite.

sw Gamma M-009 February '14 Water frozen entire month; None Required no composite.

TLD Gamma M-1-08 1st Qtr '14 TLD missing in field. Replaced TLD sw Gamma M-008 March '14 Water frozen entire month; None Required no composite.

sw H-3 M-008 March '14 Water frozen entire quarter; None Required no composite.

~

APIA I Beta, 1-131 M-001 5/14/2014 Sampler found off; GFCI Breaker reset.

tripped.

Changed sample head AP Beta M-005 5/28/2014 Filter paper shifted in holder. configuration to open heads.

Changed sample head AP Beta M-004 7/30/2014 Filter paper shifted in holder. configuration to open heads.

AP/AI Beta, 1-131 M-001 8/27/2014 Sampler found off; GFCI Breaker reset.

tripped.

BO Gamma M-008 Fall'14 Water conditions did not allow ~

None required.

Collection.

sw Gamma M-008 11/19/2014 Water frozen. None required.

sw Gamma M-008 11/26/2014 Water frozen. None required.

sw Gamma M-008 December '14 Water frozen entire month; None Required no composite.

TLD Gamma M-2C 4th Qtr '14 TLD missing in field. Replaced TLD 17

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

-Inner Ring

--o- Outer Ring 20 19 18 17

/ ~

/;~

16

~/ ~

15 1---1 I / ~ ~~ ~ ~

(/)

co 14 y----<

~ IJ

~

v ~ \_

-o

\ I

~

0::

E 13 12 11 10 0 ~ N (') V" lO <D r-. co en 0 N (') V" 0

0 N

0 0

N 0

0 N

0 0

N 0

0 N

0 0

N 0

0 0

0 N

0 0

N 0

0 N

Ci N

Ci ~

0

~

0 0 N N N N N 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)

I --o-- Control (M-1) I 0.035 0.033

/01\

/j \ \

0.031

\

/.~

/. ... ,/'

'\

0.029

\

~/! ~ /.

/ I I

v \

\

1\\

/ I 0.027 0.025 /1 1-------! v /;I

'\

v 0.023 I

/ v ', I

§ 0

0.

0.021 0.019 0.017 0.015 0 N t-- co Ol 0 Ol 0 LO <0

<:')

Ol 0 0 0 0 0 o 0 0 ~

Ol 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N 19

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. ....;,5~0-..::2~6.:..3-:---.,.--:-:---

Location of Facility Wright, Minnesota Reporting Period January-December, 2014

( 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) Analyses* Rangec Locationd Ran gee Rangec Results*

Direct Radiation TLD (Inner Ring, Gamma 56 3,0 13.5 (56/56) M-13A 14.5 (4/4) (See Control 0 General Area at ( 8.0-18.0) 0.89 mi@ 322°/NW (11.2-17.0) below.)

Site Boundary) mRem/91 days)

TLD (Outer Ring, Gamma 64 3.0 12.9 (64/64) M-148 14.4 (4/4) (See Control 0 4-5 mi. distant) ( 10.2-17.1) 4.3 mi@ 289°/WNW (11.4-17.1) below.)

mRem/91 days)

TLD (Special Gamma_ 24 3.0 13.2 (24/24) M-06S, Mont. Pub. Wks. 15.6 (4/4) (See Control 0 Interest Areas) ( 9.3-17.5) 2.6 mi@ 134°/SE (14.5-17.5) below.)

mRem/91 days)

TLD (Control) Gamma 15 3.0 None M-01C 14.4 (4/4) 14.3 (15/15) 0 mRem/91 days) 11.5 mi@ 323°/NW (10.5-17.5) ( 10.5-17.5)

Airborne Pathway Airborne GB 257 0.002 0.027 (207/207) M-5, Air Station 0.029 (51/51) 0.028 (50/50) 0 Particulates (0.006-0.061) 2.6 mi@ 134°/SE (0.011-0.059) (0.005-0.056) 3 (pCi/m )

GS 20 Be-7 0.015 0.065 (16/16) M-5, Air Station 0.072 (4/4) 0.068 (4/4) 0 (0.037-0.081) 2.6 mi@ 134°/SE (0.057-0.081) (0.045-0.082)

Mn-54 0.0009 < LLD - - < LLD 0 Co-58 0.0011 < LLD - - < LLD 0 Co-60 0.0008 < LLD - - < LLD 0 Zn-65 0.0015 < LLD - - < LLD 0 Zr-Nb-95 0.0015 < LLD - - < LLD 0 Ru-103 0.0014 < LLD - - < LLD 0 Ru-106 0.0077 < LLD - - < LLD 0 Cs-134 0.0011 < LLD - - < LLD 0 Cs-137 0.0010 < LLD - - < LLD 0 Ba-La-140 0.0042 < LLD - - < LLD 0 Ce-141 0.0023 < LLD - - < LLD 0 Ce-144 0.0055 < LLD - - < LLD 0 Airborne Iodine 1-131 257 0.03 < LLD - - < LLD 0 3

(pCi/m )

20

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. ...:5,..;;0,..;;-2:..:6,..;;3--------:-:~-

Location of FaGility Wright, Minnesota Reporting Period January-December, 2014

( County, Siate )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDb Mean (F)c Mean (F)c Mean (F)" Routine (Units) .Analyses* Rangec Locationd. Rangec Ran gee Results*

Waterborne Pathway River Water (pCi/L) H-3 7 500 < LLD - - < LLD 0 GS 19 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 33 < LLD - - < LLD 0 Drinking Water GB 12 1.0 2.8 (9/12) M-14, Minneapolis 2.8 (9/12) None 0 (pCi/L) (1.2-3.6) 37.0 mi.@ 132° /SE (1.2-3.6) 1-131 12 1.0 < LLD - - None 0 H-3 1 500 < 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 46 < LLD - - None 0 Well Water H-3 15 500 < LLD - - < LLD 0 (pCi/L) GS 15 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 48 < LLD - -' < LLD 0 21

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Monticello Nuclear Generating Plant Docket No. -=5~0....:-2:.:6~3_ _ _ _ _ __

Location of Facility Wright, Minnesota Reporting Period January-December, 2014 (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) 0 Mean (F)" Routine (Units) Analyses" Range0 Locationd Range0 Rangec Results*

Waterborne Pathway Invertebrates GS 3 (pCi/g wet) Be-7 0.57 < LLD - - < LLD 0 K-40 0.91 < LLD - - < LLD 0 Mn-54 0.046 < LLD - - < LLD 0 Fe-59 0.13 < LLD - - < LLD 0 Co-58 0.068 < LLD - - < LLD 0 Co-60 0.052 < LLD - - < LLD 0 Zn-65 0.09 < LLD - - < LLD 0 Zr-Nb-95 0.07 < LLD - - < LLD 0 Ru-103 0.075 < LLD - - < LLD 0 Ru-106 0.39 < LLD - - < LLD 0 Cs-134 0.041 < LLD - - < LLD 0 Cs-137 0.049 < LLD - - < LLD 0 Ba-La-140 0.41 < LLD - - < LLD 0 Ce-144 0.24 < LLD - - < LLD 0 Shoreline GS 6 Sediments Be-7 0.27 < LLD - - < LLD 0 (pCi/g dry) -

K-40 0.10 10.73 (4/4) M-15, Montissippi Park 10.89 (2/2) 9.12 (2/2) 0 (10.09-11.46) 1.27 mi@ 114°/ESE (10.32-11.46) (8.98-9.25)

Mn-54 0.018 < LLD - - < LLD 0 Fe-59 0.068 < LLD - - < LLD 0 Co-58 0.027 < LLD - - < LLD 0 Co-60 0.016 < LLD - - < LLD 0 Zn-65 0.045 < LLD - - < LLD 0 l

Nb-95 0.044 < LLD - - < LLD 0 Zr-95 0.042 < LLD - - < LLD 0 Ru-103 0.030 < LLD - - < LLD 0 Ru-106 0.16 < LLD - - < LLD 0 Cs-134 0.015 < LLD - - < LLD 0 Cs-137 0.016 0.047 (3/4) M-15, Montissippi Park 0.059 (1/2) 0.028 (1/3) 0 (0.033-0.059) 1.27 mi@ 114°/ESE Ba-La-140 0.11 < LLD - - < LLD 0 Ce-144 0.12 < LLD - - < LLD 0 22

Table 5.4 Radiological Environmental Monitoring Program Summary Name of Facility Location of Facility Monticello Nuclear Generating Plant Wright, Minnesota Docket No.

Reporting Period 50-263 January-December, 2014

( County, State )

Indicator Location with Highesf Control Number Sample Type and Locatioos Annual Mean Locations Non-Type Number of LLDb Mean (F) 0 Mean (Ft Mean (Ft Routine (Units) Analyses" Rangec Locationd Range0 Range 0 Results*

Ingestion Pathway Vegetation GS 9 (Pasture Grass, Mn-54 0.012 < LLD - - < LLD 0 Weeds, Leaves) Fe-59 0.031 < LLD - - < LLD 0 Co-58 0.013 < LLD - - < LLD 0 (pCi/gwet) Co-60 0.014 < LLD - - < LLD 0 Zn-65 0.029 < LLD - - < LLD 0 Nb-95 0.01*5 < LLD - - < LLD 0 1-131 0.038 < LLD - - < LLD 0 Cs-134 0.014 < LLD - - < LLD 0 Cs-137 0.013 < LLD - - < LLD 0 Fish GS 4 (pCi/g wet) K-40 0.10 2.76 (1/1) M-09, Downstream 2.76 (1/1) 2.71 (3/3) 0 (2. 76-2. 76) < 1000' of discharge (2. 76-2. 76) (2.47-3.04)

Mn-54 0.019 < LLD - - < LLD 0 Fe-59 0.059 < LLD - - < LLD 0 Co-58 0.023 < LLD - - < LLD 0 Co-60 0.017 < LLD - - < LLD 0 Zn-65 0.034 < LLD - - < LLD 0 Zr-Nb-95 0.055 < LLD - - < LLD 0 Cs-134 0.019 < LLD - - < LLD 0 Cs-137 0.018 < LLD - - < LLD 0 Ba-La-140 0.199 < LLD - - < LLD 0 Ce-144 0.140 < 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.

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. AI-Salih. 1955. Beryllium-? Produced by Cosmic Rays. Science 121: 451-453.

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

ATI Environmental, Inc., Midwest Laboratory.

- - - - - : 2001a through 2014a. Radiation Environmental Monitoring for Monticello Nuclear Generating Plant, Complete Analysis Data Tables, January-December, 2000 through 2014.

--'-----: 2001b through 2014b. Radiation Environmental Monitoring for Prairie Island Nuclear Generating Plant, Complete Analysis Data Tables, January- December, 2000 through 2014.

= 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.

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, 730~7 46.

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)

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

U.S. Environmentai*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).

, 2009. RadNet, formerly Environmental Radiation Ambient Monitoring System, Gross Beta in Air, Gross Beta in Drinking Water (MN) 1981-2005.

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 2013. 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 2013. 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

~*I. All E.l}vironmental, Inc.

'+~ 1"'\1 M1dwest Laboratory 700 Landwehr Road

Northbrook.IL 60062-2310 phone (847) 564-0700

fax (847) 564-4517 APPENDIX A INTERLABORATORY COMPARISON PROGRAM RESULTS NOTE: Environmental Inc., Midwest Laboratory participates in intercomparison studies administered by Environmental Resources Associates, and serves as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada. Results are reported in Appendix A. TLD lntercomparison 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, 2014 through December, 2014

Appendix A Interlaboratory Comparison Program Results Environmental, Inc., Midwest Laboratory has participated in interlaboratory comparison (crosscheck) programs since the formulation of it's quality control program in December 1971. These programs are operated by agencies which supply environmental type samples containing concentrations of radionuclides known to the issuing agency but not to participant laboratories. The purpose of such a program is to provide an independent check on a laboratory's analytical procedures and to alert it of any possible problems.

Participant laboratories measure the concentration of specified radionuclides and report them to the issuing agency. Several months later, the agency reports the known values to the participant laboratories and specifies control limits. Results consistently higher or lower than the known values or outside the control limits indicate a need to check the instruments or procedures used.

Results in Table A-1 were obtained through participation in the environmental sample crosscheck program administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

Table A-2 lists results for thermoluminescent dosimeters (TLDs), via International lntercomparison of Environmental Dosimeters, when available, and internal laboratory testing.

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

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

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

Complete analytical data for duplicate analyses is available upon request.

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

Results in Table A-7 were obtained through participation in the environmental sample crosscheck program administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurement Laboratory Quality Assessment Program (EML).

Attachment A lists the laboratory precision at the 1 sigma level for various analyses. The acceptance criteria in Table A-3 is set at +/- 2 sigma.

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

A1

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

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

> 50 pCi/liter or kg 10% of known value Strontium-9Gb 2 to 30 pCi/liter or kg 5.0 pCi/liter

> 30 pCi/liter or kg 10% of known value Potassi um-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 +/- 1o =

169.85 x (knov.m) 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 lodine-131, :::; 55 pCi/liter 6 pCi/liter lodine-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 lron-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 lntercomparison 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) *.

Concentration (pCi/L)

Lab Code Date Analysis .aboratory ERA Control Result b Result c Limits Acceptance ERW-1384 4/7/2014 Sr-89 40.29 +/- 5.76 36.70 27.50 +/- 43.60 Pass ERW-1384 4/7/2014 Sr-90 24.08 +/- 2.35 26.50 19.20 +/- 30.90 Pass ERW-1385 4/7/2014 Ba-133 78.23 +/- 3.93 87.90 74.00 +/- 96.70 Pass ERW-1385 4/7/2014 Co-60 62.75 +/- 3.53 64.20 57.80 +/- 73.10 Pass ERW-1385 4/7/2014 Cs-134 44.97 +/- 3.99 44.30 35.50 +/- 48.70 Pass ERW-1385 4/7/2014 Cs-137 88.54 +/- 4.93 89.10 80.20 +/- 101.00 Pass ERW-1385 4/7/2014 Zn-65 249.1 +/- 10.4 235.0 212.0 -275.0 Pass ERW-1388 4/7/2014 Gr. Alpha 56.70 +/- 2.47 61.00 31.90 +/- 75.80 Pass ERW-1388 4/7/2014 Gr. Beta 32.10 +/- 1.20 33.00 21.40 +/- 40.70 Pass ERW-1391 4/7/2014 1-131 25.52 +/- 1.12 25.70 21.30 +/- 30.30 Pass ERW-1394 4/7/2014 Ra-226 12.30 +/- 0.61 12.40 9.26 +/- 14.30 Pass ERW-1394 4/7/2014 Ra-228 5.08 +/- 1.16 4.26 2.46 +/- 5.86 Pass ERW-1394 4/7/2014 Uranium 10.76 +/- 0.74 10.20 7.95 +/- 11.80 Pass ERW-1397 4/7/2014 H-3 8982 +/- 279 8770 7610-9650 Pass ERW-5382 10/6/2014 Sr-89 29.40 +/- 5.32 31.40 22.80 +/- 38.10 Pass ERW-5382 10/6/2014 Sr-90 19.19 +/- 1.85 21.80 15.60 +/- 25.70 Pass ERW-5385 10/6/2014 Ba-133 43.54 +/- 4.54 49.10 40.30 +/- 54.50 Pass ERW-5385 10/6/2014 Cs-134 81.95 +/- 7.49 89.80 73.70 +/- 98.80 Pass ERW-5385 10/6/2014 Cs-137 95.76 +/- 5.50 98.80 88.90 +/- 111.00 Pass ERW-5385 10/6/2014 Co-60 90.25 +/- 2.77 92.10 82.90 +/- 104.00 Pass ERW-5385 10/6/2014 Zn-65 327.4 +/- 23.3 310.0 279.0 - 362.0 Pass ERW-5388 10/6/2014 Gr. Alpha 30.88 +/- 8.05 37.60 19.40 +/-46.10 Pass ERW-5388 10/6/2014 G. Beta 20.47 +/- 4.75 27.40 17.30 +/- 35.30 Pass ERW-5392 10/6/2014 1-131 19.58 +/- 2.35 20.30 16.80 +/- 24.40 Pass ERW-5394 10/6/2014 Ra-226 15.10 +/- 1.81 14.70 11.00 +/- 16.90 Pass ERW-5394 10/6/2014 Ra-228 4.42 +/- 0.86 4.31 2.50 +/- 5.92 Pass ERW-5394 10/6/2014 Uranium 5.51 +/- 0.37 5.80 4.34 +/- 6.96 Pass ERW-5397 10/6/2014 H-3 6876 +/- 383 6880 5940 -7570 Pass

Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

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

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

A1-1 A2

TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaS0 4 : Dy Cards).

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

2014-1 5/15/2014 50 em. 26.83 34.43 +/- 3.76 18.78 - 34.88 Pass 2014-1 5/15/2014 60 em. 18.63 22.20+/-1.16 13.04-24.22 Pass 2014-1 5/15/2014 70cm. 13.69 14.74 +/- 0.80 9.58 -17.80 Pass 2014-1 5/15/2014 75cm. 11.93 "12.68 +/- 1.05 8.35 -15.51 Pass 2014-1 5/15/2014 80cm. 10.48 11.81 +/- 0.91 7.34 -13.62 Pass 2014-1 5/15/2014 90cm. 8.28 7.72 +/- 0.71 5.80 - 10.76 Pass 2014-1 5/15/2014 100 em. 6.71 6.46 +/-0.71 4.70- 8.72 Pass 2014~1 5/15/2014 110 em. 5.54 5.25 +/- 1.03 3.88 -7.20 Pass 2014-1 5/15/2014 120 em. 4.66 4.76 +/- 0.48 3.26 c 6.06 Pass 2014-1 5/15/2014 135 em. 3.68 2.87 +/- 0.46 2.58-4.78 Pass 2014-1 5/15/2014 150 em. 2.98 2.30 +/- 0.15 2.09-3.87 Pass 2014-1 5/15/2014 165 em. 2.46 2.09 +/- 0.28 1.72-3.20 Pass 2014-1 5/15/2014 180 em. 2.07 1.75+/-0.21 1.45 - 2.69 Pass Environmental, Inc.

2014-2 12/9/2014 30cm. 77.04 84.03 +/- 8.47 53.90 -100.20 Pass 2014-2 12/9/2014 30cm. 77.04 83.74 +/- 12.02 53.90 -100.20 Pass 2014-2 12/9/2014 60cm. 19.26 20.39 +/- 2.37 13.50 -25.00 Pass 2014-2 12/9/2014 60cm. 19.26 20.33+/-1.19 13.50 - 25.00 Pass 2014-2 12/9/2014 120 em. 4.82 5.15 +/- 0.20 3.40-6.30 Pass 2014-2 12/9/2014 120 em. 4.82 5.20 +/- 0.45 3.40-6.30 Pass 2014-2 12/9/2014 150 em. 3.08 3.84 +/- 0.61 2.20-4.00 Pass 2014-2 12/9/2014 150 em. 3.08 3.17 +/- 0.38 2.20-4.00 Pass 2014-2 12/9/2014 150 em. 3.08 3.31 +/- 0.32 2.00-4.00 Pass 2014-2 12/9/2014 180 em. 2.14 2.27 +/- 0.51 1.50-2.80 Pass 2014-2 12/9/2014 180 em. 2.14 2.23 +/- 0.12 1.50-2.80 Pass 2014-2 12/9/2014 180 em. 2.14 2.74 +/- 0.48 1.50-2.80 Pass 2014-2 12/9/2014 180 em. 2.14 1.97 +/- 0.41 1.50-2.80 Pass A2-1

TABLE A-3. In-House "Spiked" Samples Concentration (pCi/L)"

Lab Code b *Date Analysis Laboratory results Known Control 2s, .n=1 c Activity Limits d Acceptance SPW-1011 1/13/2014 Ra-228 35.47 +/- 2.55 30.85 21.60 - 40.11 Pass SPAP-103 1/13/2014 Gr. Beta 43.91 +/- 0.34 44.82 26.89-62.75 Pass SPAP-105 1/13/2014 Cs-134 2.46 +/- 0.67 2.82 1.69 -3.95 Pass SPAP-105 1/13/2014 Cs-137 102.4 +/- 2.7 99.9 89.9 - 109.9 Pass SPW-107 1/13/2014 H-3 62,380 +/- 707 62,246 49,797 -74,695 Pass SPW-129 1/15/2014 Cs-134 69.90 +/- 3.71 78.00 68.00 - 88.00 Pass SPW-129 1/15/2014 Cs-137 . 84.36 +/- 7.06 75.77 65.77 - 85.77 Pass SPW-129 1/15/2014 Sr-90 39.48 +/- 1.52 39.20 31.36 - 47.04 Pass SPW-130 1/15/2014 Ni-63 255.8 +/- 3.8 204.0 142.8 -265.2 Pass SPW-133 1/15/2014 C-14 3153 +/- 15 4737 2842-6632 Pass SPMI-135 1/15/2014 Cs-134 76.80 +/- 4.04 78.00 68.00 - 88.00 Pass SPMI-135 1/15/2014 Cs-137 80.44 +/- 6.63 75.80 65.80 - 85.80 Pass W-12014 1/20/2014 Gr. Alpha 19.69 +/- 0.41 20.00 10.00 - 30.00 Pass W-12014 1/20/2014 Gr. Beta 30.35 +/- 0.33 30.90 20.90 - 40.90 Pass SPW-297 1/29/2014 Tc-99 104.2+/-1.7 107.8 75.5 - 140.2 Pass SPW-657 2/25/2014 Ra-226 15.84 +/- 0.45 16.70 11.69-21.71 Pass SPW-1127 3/26/2014 U-238 43.28 +/- 2.56 41.72 29.20 - 54.24 Pass SPW-1917 3/28/2014 Pu-238 27.37 +/-2.13 23.80 14.28 - 33.32 Pass I SPW-1786 4/25/2014 Tc-99 531.1 +/- 8.7 539.15 377.41 -700.90 Pass SPW-2168 5/21/2014 Cs-134 70.90 +/- 5.81 69.50 59.50 - 79.50 Pass SPW-2168 5/21/2014 Cs-137 79.72 +/- 6.49 75.17 65.17-85.17 Pass SPW-2168 5/21/2014 Sr-89 83.35 +/- 5.05 72.85 - 58.28 - 87.42 Pass SPW-2168 5/21/2014 Sr-90 33.37 +/- 1.52 38.87 31.10-46.64 Pass SPMI-2170 5/21/2014 Cs-134 64.15 +/-4.93 69.50 59.50 - 79.50 Pass SPMI-2170 5/21/2014 Cs-137 76.21 +/- 6.91 75.17 65.17 - 85.17 Pass SPMI-2170 5/21/2014 Sr-89 65.82 +/- 4.89 72.85 58.28 - 87.42 Pass SPMI-2170 5/21/2014 Sr-90 40.90 +/- 1.59 38.87 31.10 -46.64 Pass SPW-2792 6/18/2014 U-238 44.80 +/- 1.54 41.70 29.19 - 54.21 Pass SPW-2796 6/18/2014 C-14 3495 +/-9 4,737 2,842-6632 Pass WW-2836 6/30/2014 Co-60 131.8 +/-6.9 140.90 126.81-154.99 Pass WW-2836 6/30/2014 Cs-137 143.8 +/-9.1 145.60 131.04-160.16 Pass WW-2836 6/30/2014 H-3 6220 +/- 238 6,361 5,089 -7633 Pass A3-1

TABLE A-3. In-House "Spiked" Samples Concentration (pCi/Lt Lab Code b Date Analysis Laboratory results Known Control 2s, n=1 c Activity Limits d Acceptance SPW-3486 7/17/2014 Fe-55 2211 +/- 72 2319 1855 -2783 Pass SPW-080714 8/7/2014 Gr. Alpha 18.42 +/- 0.40 20.10 10.05-30.15 Pass SPW-080714 8/7/2014 Gr. Beta 31.70 +/- 0.40 32.40 22.40 - 42.40 Pass SPW-081214 8/12/2014 Pu-238 22.59 +/- 2.15 22.70 18.16-27.24 Pass SPW-4093 8/13/2014 I-131(G) 59.95 +/- 6.17 59.62 49.62 - 69.62 Pass SPW-4093 8/13/2014 Sr-90 39.46 +/- 1.55 38.65 28.65 - 48.65 Pass SPW-4093 8/13/2014 Sr-89 105.5 +/- 4.9 115.0 92.0 - 149.5 Pass SPMI-4095 8/13/2014 I-131(G) 59.92 +/- 6.17 59.62 49.62 - 69.62 Pass SPMI-4095 8/13/2014 1-131 60.05 +/- 0.72 59.62 47.70-71.54 Pass SPW-4104 8/13/2014 Ni-63 200.1 +/- 3.4 203.2 142.2 - 264.1 Pass SPW-4106 8/13/2014 H-3 59,597 +/- 695 60,261 48209 -72313 Pass SPW-4108 8/13/2014 Cs-134 2.45 +/- 0.81 2.32 0.00 - 12.32 Pass SPW-4108 8/13/2014 Cs-137 90.20 +/- 3.74 98.56 88.56 - 108.56 Pass SPAP-4110 8/13/2014 Gr. Beta 43.65 +/- 0.11 44.19 34.19-54.19 Pass SPF-4112 8/13/2014 1-131 2.64 +/- 0.38 2.86 0.00 - 12.86 Pass SPF-4112 8/13/2014 Cs-134 0.91 +/- 0.03 1.03 0.00 - 11.03 Pass SPF-4112 8/13/2014 Cs-137 2.61 +/- 0.06 2.39 0.00 - 12.39 Pass SPW-081414 8/14/2014 H-3 14,663 +/- 788 17,700 14160 - 21240 Pass W081614 8/16/2014 Ra-226 14.30 +/- 0.37 16.70 11.69 - 21.71 Pass W082614 8/26/2014 Ra-228 27.18 +/-2.13 30.49 20.49 - 40.49 Pass SPW-090414 9/4/2014 Gr. Alpha 17.85 +/- 0.39 20.10 10.05-30.15 Pass SPW-090414 9/4/2014 Gr. Beta 30.03 +/- 0.33 30.90 20.90 - 40.90 Pass SPW-5124 9/29/2014 Ra-228 32.93 +/- 2.38 31.94 21.94-41.94 Pass W100714 10/7/2014 Gr. Alpha 18.56 +/- 0.40 20.10 10.05-30.15 Pass W100714 1017/2014 Gr. Beta 27.71 +/- 0.32 30.90 20.90 - 40.90 Pass W111014 11/10/2014 Gr. Alpha 17.84 +/- 0.38 20.10 10.05-30.15 Pass W111014 11/10/2014 Gr. Beta 30.12 +/- 0.33 30.90 20.90 - 40.90 Pass W112514 11/25/2014 Ra-226 16.63 +/- 0.41 16.70 11.69-21.71 Pass W120814 12/8/2014 Gr. Alpha 19.29 +/- 0.41 20.10 10.05-30.15 Pass W120814 12/8/2014 Gr. Beta 27.93 +/- 0.32 30.90 20.90 - 40.90 Pass SPW-7149 12/26/2014 Ni-63 217.53 +/- 3.25 203.10 142.17-264.03 Pass

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), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

Results are based on single determinations.

d Control limits are established from the precision values listed in Attachment A of this report, <!djusted to+/- 2s.

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

A3-2

TABLE A-4. In-House "Blank" Samples Concentration (pCi/L) 3 Lab Code Sample Date Analysisb Laboratory results (4.66cr) -Acceptance Type LLD Activitl Criteria (4.66 cr)

SPW-1001 Water 1/13/2014 Ra-228 0.74 0.39 +/- 0.39 2 SPAP-102 Air Particulate 1/13/2014 Gr. Beta 0.003 0.015 +/- 0.003 0.01 SPAP-104 Air Particulate 1/13/2014 Cs-134 0.006 0.005 +/- 0.005 0.05 SPAP-104 Air Particulate 1/13/2014 Cs-137 . 0.004 -0.002 +/- 0.005 0.05 SPW~106 Water 1/13/2014 H-3 151.0 115.0+/-97.0 200 SPW-128 Water 1/15/2014 Cs-134 2.85 0.59 +/- 1.46 10 SPW-128 *Water 1/15/2014 Cs-137 2.52 0.68 +/- 1.64 10 SPW-128 Water 1/15/2014 Sr-90 0.61 0.74 +/- 0.36 SPW-130 Water 1/15/2014 Ni-63 10.85 1.57 +/- 6.60 20 SPW-133 Water 1/15/2014 C-14 13.51 3.10 +/- 8.27 200 SPMI-134 Milk 1/15/2014 Cs-134 4.43 0.14 +/- 2.46 10 SPMI-134 Milk 1/15/2014 Cs-137 1.92 -2.07 +/- 2.48 10 W-12014 Water 1/20/2014 Gr. Alpha 0.48 -0.31 +/- 0.31 2 W-12014 Water 1/20/2014 Gr. Beta 0.78 -0.24 +/- 0.54 4 SPW-297 Water 1/29/2014 Tc-99 5.63 -4.42 +/- 3.34 10 SPW-656 Water 2/25/2014 Ra-226 0.03 0.01 +/- 0.02 SPW-1126 Water 3/26/2014 U-238 0.13 0.08 +/- 0.12 SPW-1127 Water 3/26/2014 U-233/234 0.13 0.11 +/- 0.13 SPW-1127 Water 3/26/2014 U-238 0.00 0.08 +/- 0.12 SPW-1917 Water 3/28/2014 Pu-238 0.02 0.01 +/- 0.01 SPW-1785 Water 4/25/2014 Tc-99 5.61 -4.33 +/- 3.33 10 SPW-1831 Water 4/30/2014 1-131 0.21 0.07 +/- 0.12 0.5 SPW-2167 Water 5/21/2014 Cs-134 2.29 -0.79 +/- 1.35 10 SPW-2167 Water 5/21/2014 Cs-137 2.46 0.36 +/- 1.48 10 SPW-2167 Water 5/21/2014 I-131(G) 2.77 0.25 +/- 1.53 20 SPW-2167 Water 5/21/2014 Sr-89 0.81 0.01 +/- 0.62 5 SPW-2167 Water 5/21/2014 Sr-90 0.52 0.03 +/- 0.24 SPMI-2169 Milk 5/21/2014 Cs-134 4.45 -0.55 +/- 2.39 10 SPMI-2169 Milk 5/21/2014 Cs-137 3.91 -0.52 +/- 2.60 10 SPMI-2169 Milk 5/21/2014 I-131(G) 4.31 2.57 +/- 2.21 20 SPMI-2169 Milk 5/21/2014 Sr-89 0.98 -0.02 +/- 0.83 5 SPMI-2169 Milk 5/21/2014 Sr-90 0.61 0.35 +/- 0.32 1 SPW-2793 Water 6/18/2014 U-238 0.08 0.02 +/- 0.06 M-1

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

SPW-3485 Water 7/17/2014 Fe-55 597.6 10.3 +/- 363.3 1000 SPW-4092 Water 8/13/2014 I-131(G) 3.59 0.91 +/-1.95 20 SPW-4092 Water 8/13/2014 Cs-134 3.71 -0.31 +/- 1.77 10 SPW-4092 Water 8/13/2014 Cs-137 2.71 -2.20 +/- 1.98 10 SPW-4092 Water 8/13/2014 Sr-89 0.89 0.11 +/- 0.63 5 SPW-4092 Water 8/13/2014 Sr-90 0.52 -0.05 +/- 0.23 SPMI-4094 Milk 8/13/2014 1-131 0.35 0.03 +/- 0.20 0.5 SPMI-4094 Milk 8/13/2014 I-131(G) 4.50 -0.41 +/- 2.44 20 SPMI-4094 Milk 8/13/2014 Cs-134 4.30 -0.84 +/- 2.02 10 SPMI-4094 Milk 8/13/2014 Cs-137 3.45 0.96 +/- 2.51 10 SPMI-4094 Milk 8/13/2014 Sr-89 0.80 -0.19 +/- 0.79 5 SPMI-4094 Milk 8/13/2014 Sr-90 0.47 0.71 +/- 0.30 SPW-4103 Water 8/13/2014 Ni-63 0.12 0.02 +/- 0.07 20 SPW-4105 Water 8/13/2014 H-3 138.1 104.1 +/- 78.1 200 SPW-4107 Water 8/13/2014 I-131(G) 3.21 -3.68 +/- 1.33 20 SPW-4107 Water 8/13/2014 Cs-134 2.72 -0.62 +/- 1.49 10 SPW-4107 Water 8/13/2014 Cs-137 2.56 0.75+/-1.62 10 SPAP-4109 Air Particulate 8/13/2014 Gr. Beta 0.004 -0.003 +/- 0.00 0.01 SPF-4111 Fish 8/13/2014 Cs-134 0.01 0.00 +/- 0.01 100 SPF-4111 Fish 8/13/2014 Cs-137 0.01 -0.01 +/- 0.01 100 SPF-4111 Fish 8/13/2014 Co-60 0.01 0.00 +/- 0.01 100 W-081614 Water 8/16/2014 Ra-226 0.04 0.05 +/- 0.03 W-082614 Water 8/16/2014 Ra-228 0.62 0.29 +/- 0.40 2 W-092314 Water 9/23/2014 Ra-226 0.02 0.04 +/- 0.02 W-5123 Water 9/29/2014 Ra-228 0.70 0.43 +/- 0.38 2 W-100714 Water 10n/2014 Gr. Alpha 0.39 0.04 +/- 0.28 2 W-100714 Water 10n/2014 Gr. Beta 0.76 -0.06 +/- 0.53 4 W-111014 Water 11/10/2014 Gr. Alpha 0.39 0.01 +/- 0.28 2 W-111014 Water 11/10/2014 Gr. Beta 0.75 -0.25 +/- 0.52 4 W-112514 Water 11/25/2014 Ra-226 0.05 0.02 +/- 0.03 2 W-120814 Water 12/8/2014 Gr. Alpha 0.42 0.04 +/- 0.30 2 W-120814 Water 12/8/2014 Gr. Beta 0.74' -0.42 +/- 0.51 4 SPW-7148 Water 12/26/2014 Ni-63 10.80 -1.80 +/- 6.50 20 a Liquid sample results are reported in pCi/Liter, air filters( pCitm\ charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

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

c Activity reported is a net activity result.

A4-2

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)"

Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-7829, 7830 1/2/2014 Be-7 0.08 +/- 0.02 0.06 +/- 0.01 0.07 +/- 0.01 Pass AP-7913, 7914 1/2/2014 Be-7 0.07 +/- 0.01 0.06 +/- 0.01 0.06 +/- 0.01 Pass AP-7871, 7872 1/3/2014 Be-7 0.05 +/- 0.02 0.06 +/- 0.01 0.06 +/- 0.01 Pass S-43, 44 1/9/2014 K-40 19.28 +/- 0.57 19.24 +/- 0.57 19.26 +/- 0.40 Pass SG-64, 65 1/9/2014 Gr. Alpha 686.08 +/- 69.97 642.46 +/- 65.59 664.27 +/- 47.95 Pass SG-64, 65 1/9/2014 Ra-226 97.30 +/- 9.78 92.20 +/- 9.27 94.75 +/- 6.74 Pass SG-64, 65 1/9/2014 Ra-228 91.90 +/- 9.30 97.10 +/- 9.87 94.50 +/- 6.78 Pass S-136, 137 1/13/2014 Be-7 14.90 +/- 0.39 14.88 +/- 0.38 14.89 +/- 0.27 Pass S-136, 137 1/13/2014 K-40 3.29 +/- 0.36 3.93 +/- 0.36 3.61 +/- 0.25 Pass WW-220, 221 1113/2014 H-3 231.85 +/- 80.45 273.46 +/- 82.47 252.66 +/- 57.60 Pass WW-262, 263 1/21/2014 H-3 294.80 +/- 89.80 265.00 +/- 88.47 279.90 +/- 63.03 Pass WW-346, 347 1/24/2014 H-3 934.97 +/- 118.47 965.59 +/- 119.52 950.28 +/- 84.14 Pass SWU-367, 368 1/29/2014 Gr. Beta 0.74 +/- 0.38 1.31 +/- 0.42 1.02 +/- 0.28 Pass F-409, 410 2/2/2014 Cs-137 0.05 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 Pass F-409, 410 2/2/2014 Gr. Beta 3.60 +/- 0.07 3.72 +/- 0.07 3.66 +/- 0.05 Pass AP-7829, 7830 1/2/2014 Be-7 0.08 +/- 0.02 0.06 +/- 0.01 0.07 +/- 0.01 Pass AP-7913, 7914 1/2/2014 Be-7 0.07 +/- 0.01 0.06 +/- 0.01 0.06 +/- 0.01 Pass AP-7871, 7872 1/3/2014 Be-7 0.05 +/- 0.02 0.06 +/- 0.01 0.06 +/- 0.01 Pass S-43, 44 1/9/2014 K-40 19.28 +/- 0.57 19.24 +/- 0.57 19.26 +/- 0.40 Pass SG-64, 65 1/9/2014 Gr. Alpha 686.08 +/- 69.97 642.46 +/- 65.59 664.27 +/- 47.95 Pass SG-64, 65 1/9/2014 Ra-226 97.30 +/- 9.78 92.20 +/- 9.27 94.75 +/- 6.74 Pass SG-64, 65 1/9/2014 Ra-228 91.90 +/- 9.30 97.10 +/- 9.87 94.50 +/- 6.78 Pass S-136, 137 1/13/2014 Be-7 14.90 +/-0.39 14.88 +/- 0.38 14.89 +/- 0.27 Pass S-136, 137 1/13/2014 K-40 3.29 +/- 0.36 3.93 +/- 0.36 3.61 +/- 0.25 Pass WW-220, 221 1/13/2014 H-3 231.85 +/- 80.45 273.46 +/- 82.47 252.66 +/- 57.60 Pass WW-262, 263 1/21/2014 H-3 294.80 +/- 89.80 265.00 +/- 88.47 279.90 +/- 63.03 Pass WW-346, 347 1/24/2014 H-3 934.97 +/- 118.47 965.59 +/- 119.52 950.28 +/- 84.14 Pass SWU-367, 368 1/29/2014 Gr. Beta 0.74 +/- 0.38 1.31 +/- 0.42 1.02 +/- 0.28 Pass F-409, 410 21212014 Cs-137 0.05 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 Pass F-409, 410 2/2/2014 Gr. Beta 3.60 +/- 0.07 3.72 +/- 0.07 3.66 +/- 0.05 Pass WW-491, 492 21612014 H-3 474.00 +/- 101.10 583.10 +/- 105.30 528.55 +/- 72.99 Pass WW-575, 576 2/13/2014 H-3 196.69 +/- 82.94 154.68 +/- 80.89 175.69 +/- 57.93 Pass W-617, 618 2/14/2014 H-3 526.29 +/- 97.65 579.51 +/- 99.77 552 ..90 +/- 69.80 Pass SWU-743, 744 2/25/2014 Gr. Beta 1.61 +/- 0.65 1.73 +/- 0.71 1.67 +/- 0.48 Pass S-700, 701 2/26/2014 K-40 21.32 +/- 0.64 21.15 +/- 0.59 21.24 +/- 0.44 Pass S-806, 807 3/4/2014 K-40 24.79 +/- 0.57 24.17 +/- 0.59 24.48 +/- 0.41 Pass SG-928, 929 3/11/2014 Ac-228 6.78 +/- 0.34 6.94 +/- 0.35 6.86 +/- 0.24 Pass SG-928, 929 3/11/2014 Bi-214 5.32 +/- 0.20 5.34 +/- 0.22 5.33 +/- 0.15 Pass SG-928, 929 3/11/2014 K-40 4.79 +/- 0.80 6.24 +/- 1.01 5.52 +/- 0.64 Pass SG-928, 929 3/11/2014 Pb-212 2.70 +/- 0.09 2.75 +/- 0.09 2.73 +/- 0.06 Pass SG-928, 929 3/11/2014 Pb-214 5.39 +/- 0.17 5.53 +/- 0.17 5.46 +/- 0.12 Pass SG-928, 929 3/11/2014 Th-228 6.10 +/- 2.07 4.76 +/- 1.93 5.43 +/- 1.42 Pass SG-928, 929 3/11/2014 Tl-208 0.92 +/- 0.06 0.91 +/- 0.06 0.92 +/- 0.04 Pass A5-1

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)"

Averaged Lab Code Date Analysis First Result Second Result Result Acceptance S-2119, 2120 3/12/2014 Ac-228 0.76 +/- 0.20 0.73 +/- 0.21 0.75+/-0.15 Pass S-2119, 2120 3/12/2014 Cs-137 0.13+/-0.05 0.11+/-0.05 0.12 +/- 0.04 Pass S-2119, 2120 3/12/2014 K-40 17.48 +/- 1.48 18.39 +/- 1.53 17.94 +/- 1.06 Pass S-2119, 2120 3/12/2014 Pb-214 0.73+/-0.18 0.63 +/- 0.12 0.68+/-0.11 Pass F-1594, 1595 3/16/2014 Cs-137 0.02 +/- 0.01 0.03 +/- 0.02 0.03 +/- 0.01 Pass S0-1115, 1116 3/18/2014 Cs-137 0.06 +/- 0.01 0.06 +/- 0.00 0.06 +/- 0.00 Pass S0-1115, 1116 3/18/2014 Gr. Beta 23.30 +/- 2.10 24.40 +/- 2.20 23.85 +/- 1.52 Pass S0-1115, 1116 3/18/2014 K-40 12.63 +/- 0.18 12.84 +/-0.15 12.74 +/- 0.12 Pass S0-1115, 1116 3/18/2014 U-233/4 0.11 +/- 0.02 0.12 +/- 0.02 0.12 +/-0.01 Pass S0-1115, 1116 3/18/2014 U-238 0.13 +/- 0.02 0.14 +/-0.02 0.14 +/- 0.01 Pass S-1033, 1034 3/19/2014 Ac-228 0.99 +/- 0.20 1.13 +/- 0.26 1.06+/-0.16 Pass S-1 033, 1034 3/19/2014 Bi-214 1.02 +/- 0.18 0.98 +/- 0.16 1.00 +/- 0.12 Pass S-1033, 1034 3/19/2014 Cs-137 0.15 +/- 0.04 0.14 +/- 0.04 0.15 +/- 0.03 Pass S-1033, 1034 3/19/2014 K-40 15.39 +/- 1.19 15.13 +/- 1.19 15.26 +/- 0.84 Pass S-1033, 1034 3/19/2014 Pb-214 1.09 +/-0.13 0.88 +/- 0.17 0.99 +/- 0.11 Pass S-1033, 1034 3/19/2014 Tl-208 0.36 +/- 0.05 0.31 +/- 0.05 0.34 +/- 0.04 Pass W-1094, 1095 3/23/2014 Ra-226 0.30 +/- 0.20 0.70 +/- 0.20 0.50 +/- 0.14 Pass W-1094, 1095 3/23/2014 Ra-228 1.10+/-0.79 1.13+/-0.86 .1.12+/-0.58 Pass AP-1197, 1198 3/27/2014 Be-7 0.17 +/- 0.08 0.14 +/- 0.08 0.15 +/- 0.05 Pass AP-1698, 1699 3/31/2014 Be-7 0.06 +/- 0.02 0.07 +/- 0.02 0.07 +/- 0.01 Pass E-1218, 1219 4/1/2014 Gr. Beta 1.57 +/- 0.04 1.57 +/- 0.04 1.57 +/- 0.03 Pass E-1218, 1219 4/1/2014 K-40 1.26 +/- 0.14 1.31 +/- 0.18 1.29 +/- 0.11 Pass SWU-1260, 1261 4/1/2014 Gr. Beta 2.81 +/- 0.51 2.94 +/- 0.50 2.88 +/- 0.36 Pass AP-1615, 1616 4/1/2014 Be-7 0.07 +/- 0.01 0.07 +/- 0.02 0.07 +/- 0.01 Pass AP-1657, 1658 4/2/2014 Be-7 0.07 +/- 0.01 0.08 +/- 0.01 0.07 +/- 0.01 Pass AP-1804, 1805 4/3/2014 Be-7 0.05 +/- 0.02 0.06 +/- 0.01 0.06 +/- 0.01 Pass P-1489, 1490 4/7/2014 H-3 582.31 +/- 101.85 505.07 +/- 98.72 543.69 +/- 70.92 Pass BS-1531, 1532 4/16/2014 K-40 0.51 +/- 0.19 0.58 +/- 0.23 0.54 +/- 0.15 Pass S-1909, 1910 4/22/2014. K-40 14.71 +/- 0.54 14.78 +/- 0.53 14.75 +/- 0.38 Pass SWU-1867, 1868 4/29/2014 Gr. Beta 2.28 +/- 0.40 1.67 +/- 0.35 1.98 +/- 0.27 Pass AP-1930, 1931 5/1/2014 Be-7 0.16 +/- 0.09 0.19 +/- 0.11 0.17 +/- 0.07 Pass SL-1888, 1889 5/1/2014 Be-7 0.80 +/- 0.04 0.76 +/- 0.08 0.78 +/- 0.05 Pass SL-1888, 1889 5/1/2014 Cs-137 0.01 +/- 0.00 0.01 +/- 0.00 0.01 +/- 0.00 Pass SL-1888, 1889 5/1/2014 Gr. Beta 11.57 +/-0.72 12.67 +/- 0.78 12.12 +/-0.53 Pass SL-1888, 1889 5/1/2014 K-40 1.04 +/- 0.05 1.00 +/- 0.09 1.02 +/- 0.05 Pass S0-1972, 1973 5/1/2014 Cs-137 0.12 +/- 0.03 0.10 +/- 0.02 0.11+/-0.02 Pass S0-1972; 1973 5/1/2014 Gr. Alpha 7.51 +/- 3.24 9.09 +/- 3.63 8.30 +/- 2.43 Pass S0-1972, 1973 5/1/2014 Gr. Beta 29.89 +/- 3.25 31.42 +/- 3.04 30.66 +/- 2.23 Pass S0-1972, 1973 5/1/2014 K-40 20.45 +/- 0.85 20.88 +/- 0.76 20.66 +/- 0.57 Pass W-617, 618 5/8/2014 H-3 175.13 +/- 83.82 177.17 +/- 83.92 176.15 +/- 59.31 Pass AP-2077, 2078 5/8/2014 Be-7 0.23 +/- 0.11 0.18 +/- 0.11 0.20 +/- 0.08 Pass A5-2

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance S-2205, 2206 5/15/2014 Be-7 0.50 +/- 0.19 0.70 +/-0.18 0.60 +/- 0.13 Pass S-2205, 2206 5/15/2014 K-40 33.60 +/- 0.79 33.52 +/- 0.70 33.56 +/- 0.53 Pass VE-2184, 2185 5/19/2014 Be-7 0.62 +/- 0.18 0.53 +/-0.17 0.58 +/- 0.12 Pass VE-2184, 2185 5/19/2014 K-40 5.30 :f 0.44 5.14 +/- 0.44 5.22 +/- 0.31 Pass DW-50102, 50103 5/20/2014 Ra-226 7.07 +/- 0.76 8.31 +/- 0.90 7.69 +/- 0.59 Pass DW-501 02, 50103 5/20/2014 Ra-228 5.44 +/- 0.85 6.02 +/- 0.67 5.73 +/- 0.54 Pass SW-2226, 2227 5/21/2014 H-3 14318.00 +/- 347.00 14350.00 +/- 347.00 14334.00 +/- 245.37 Pass DW-50087, 50088 5/21/2014 Gr. Alpha 1.76 +/- 1.09 2.67 +/- 1.01 2.22 +/- 0.74 Pass DW-50090, 50091 5/21/2014 Ra-226 0.61 +/- 0.09 0.47 +/- 0.09 0.54 +/- 0.06 Pass DW-50090, 50091 5/21/2014 Ra-228 0.97 +/-0.41 1.26 +/- 0.52 1.12 +/- 0.33 Pass DW-50098, 50099 5/21/2014 Gr. Alpha 13.04+/-1.36 10.76 +/- 1.26 11.90 +/- 0.93 Pass AP-2289, 2290 5/22/2014 Be-7 0.14 +/- 0.08 0.24 +/- 0.10 0.19 +/- 0.06 Pass PM-3174, 3175 5/28/2014 K-40 30.68 +/- 1.30 32.64 +/- 1.24 31.66 +/- 0.90 Pass G-2415, 2416 6/2/2014 Be-7 0.73 +/- 0.16 0.62 +/- 0.28 0.68 +/- 0.16 Pass G-2415,2416 6/2/2014 Gr. Beta 5.89 +/- 0.09 5.90 +/- 0.09 5.89 +/- 0.06 Pass G-2415,2416 6/2/2014 K-40 5.30 +/- 0.49 5.19 +/- 0.65 5.25 +/- 0.41 Pass WW-2541, 2542 6/4/2014 H-3 5107.00 +/- 223.00 5029.00 +/- 222.00 5068.00 +/- 157.33 Pass SW-2817, 2818 6/16/2014 H-3 13303.00 +/- 336.00 13130.00 +/- 334.00 13216.50 +/- 236.88 Pass SS-2943, 2944 6/24/2014 K-40 11.49 +/- 0.79 11.81 +/- 0.70 11.65 +/- 0.53 Pass S-3048, 3049 6/27/2014 K-40 42.51 +/- 1.31 40.04 +/- 1.39 41.28 +/- 0.95 Pass SWT-3216, 3217 7/1/2014 Gr. Beta 2.27 +/- 0.94 2.53 +/- 1.05 2.40 +/- 0.70 Pass AP-3699,3700 7/3/2014 Be-7 0.06 +/- 0.01 0.07 +/- 0.02 0.07 +/- 0.01 Pass S-3300, 3301 7/8/2014 K-40 4.85 +/- 0.97 5.91 +/- 1.17 5.38 +/- 0.76 Pass S-3300, 3301 7/8/2014 Ac-228 10.23 +/- 0.43 10.18 +/- 0.32 10.21 +/- 0.27 Pass S-3300, 3301 7/8/2014 Ra-226 70.14 +/- 2.37 72.01 +/- 2.38 71.08 +/- 1.68 Pass VE-3237,3238 7/8/2014 K-40 2.54 +/- 0.27 2.63 +/- 0.24 2.59 +/- 0.18 Pass CF-3384,3385 7/14/2014 K-40 11.10 +/- 0.58 10.69 +/- 0.60 10.90 +/- 0.42 Pass S-3447,3448 7/16/2014 K-40 19.63 +/- 0.64 21.03 +/- 0.96 20.33 +/- 0.58 Pass WW-3573,3574 7/18/2014 H-3 381.58 +/- 85.76 401.30 +/- 86.67 391.44 +/- 60.96 Pass VE-3594,3595 7/22/2014 K-40 3.04 +/- 0.19 3.21 +/- 0.15 3.13 +/- 0.12 Pass WW-3762,3763 7/?5/2014 H-3 315.47 +/- 87.02 327.30 +/- 87.56 321.39 +/- 61.72 Pass SWT-3867, 3868 7/29/2014 Gr. Beta 1.10 +/-0.53 1.51 +/- 0.58 1.31 +/- 0.39 Pass S-3804, 3805 7/30/2014 Ac-228 0.67 +/- 0.11 0.61 +/- 0.10 0.64 +/- 0.07 Pass S-3804, 3805 7/30/2014 Pb-214 0.56 +/- 0.05 0.51 +/- 0.04 0.54 +/- 0.03 Pass LW-3931, 3932 7/31/2014 Gr. Beta 1.04 +/- 0.40 0.95 +/- 0.41 1.00 +/- 0.29 Pass A 5-3

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance G-3952,3953 8/4/2014 K-40 5.42 +/- 0.42 5.35 +/- 0.34 5.38 +/- 0.27 Pass G-3952,3953 8/4/2014 Be-7 1.29 +/-0.19 1.24 +/-Oc16 1.27 +/-0.13 Pass G-3952,3953 8/4/2014 Gr. Beta 8.53 +/- 0.20 8.63 +/- 0.20 8.58 +/- 0.14 Pass G-3952,3953 8/4/2014 H-3 140.16 +/- 93.50 127.25 +/- 92.99 133.70 +/- 65.94 Pass WW-4036, 4037 8/5/2014 H-3 190.60 +/- 82.60 164.70 +/- 81.30 177.65 +/- 57.95 Pass VE-4204,4205 8/11/2014 K-40 6.28 +/- 0.38 6.60 +/- 0.37 6.44 +/- 0.27 Pass WW-4394,4395 8/13/2014 H-3 1540.26 +/- 136.52 1499.15 +/- 135.43 1519.71 +/- 96.15 Pass VE-4183,4184 8/14/2014 K-40 5.70 +/- 0.41 5.73 +/- 0.34 5.72 +/- 0.27 Pass AV-4455, 4456 8/22/2014 Be-7 286.67 +/- 102.30 251.99 +/- 98.94 269.33 +/-71.16 Pass AV-4455, 4456 8/22/2014 K-40 2547.90 +/- 255.70 2201.40 +/- 203.90 2374.65 +/- 163.52 Pass WW-4500, 4501 8/26/2014 H-3 347.00 +/- 100.00 321.00 +/- 98.00 334.00 +/- 70.01 Pass AP-090214NB 9/2/2014 Gr. Beta 0.03 +/- 0.04 0.03 +/- 0.04 0.03 +/- 0.00 Pass SG-5089, 5090 9/19/2014 Ac-228 8.26 +/- 0.63 9.48 +/- 0.68 8.87 +/- 0.46 Pass SG-5089, 5090 9/19/2014 Bi-214 4.71 +/- 0.29 4.41 +/- 0.31 4.56 +/- 0.21 Pass SG-5194,5 10/1/2014 Gr. Alpha 276.20 +/- 9.51 258.60 +/- 9.26 267.40 +/- 6.64 Pass SG-5194,5 10/1/2014 Pb-214 43.56 +/- 0.73 43.94 +/- 0.78 43.75 +/- 0.53 Pass SG-5194,5 10/1/2014 Ac-228 59.90 +/- 1.37 62.80 +/- 1.73 61.35 +/- 1.10 Pass S-5632,3 10/8/2014 K-40 19.28 +/- 0.88 17.94 +/- 0.89 18.61 +/- 0.63 Pass S-5632,3 10/8/2014 Cs-137 0.15 +/- 0.03 0.13 +/- 0.03 0.14 +/- 0.02 Pass S-5632,3 10/8/2014 Tl-208 0.32 +/- 0.03 0.34 +/- 0.03 0.33 +/- 0.02 Pass S-5632,3 10/8/2014 Pb-212 0.92 +/- 0.05 0.92 +/- 0.05 0.92 +/- 0.03 Pass S-5632,3 10/8/2014 Pb-214 1.25 +/- 0.08 1.09 +/- 0.09 1.17 +/- 0.06 Pass S-5632,3 10/8/2014 Bi-212 1.25 +/- 0.29 1.34 +/- 0.47 1.29 +/- 0.27 Pass S-5632,3 10/8/2014 Ac-228 1.08 +/- 0.14 1.10+/-0.14 1.09 +/- 0.10 Pass DW-50243,4 10/13/2014 Gr. Alpha 2.99 +/- 0.94 4.98 +/- 1.17 3.99 +/- 0.75 Pass AP-101414NB 10/14/2014 Gr. Beta 0.02 +/- 0.00 0.02 +/- 0.00 0.02 +/- 0.00 Pass SG-5590,1 10/15/2014 Pb-214 80.30 +/- 8.08 73.40 +/- 7.51 76.85 +/- 5.52 Pass SG-5590,1 10/15/2014 Ac-228 64.50 +/- 1.87 62.80 +/- 1.15 63.65 +/- 1.10 Pass DW-50251,2 10/16/2014 Ra-226 0.55 +/- 0.13 0.32 +/- 0.10 0.44 +/- 0.08 Pass U-5842,3 10/20/2014 H-3 7376 +/- 949 7342 +/- 947 7359 +/- 670 Pass CF-6074,5 10/21/2014 H-3 7509 +/- 283 7969 +/- 291 7739 +/- 203 Pass CF-6074,5 10/21/2014 K-40 3.09 +/- 0.31 3.30 +/- 0.38 3.20 +/- 0.25 Pass A 5-4

TABLE A-5. In-House "Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code o*ate Analysis First Result Second Result Result Acceptance VE-6269,70 11/3/2014 K-40 6.25 +/- 0.54 6.56 +/- 0.49 6.41 +/- 0.36 Pass VE-6269,70 11/3/2014 Be-7 0.81 +/- 0.28 0.74 +/- 0.18 0.77 +/- 0.17 Pass S0-6500,1 11/5/2014 Sr-90 0.07 +/- 0.03 0.07 +/- 0.02 0.07 +/- 0.02 Pass S0-6500,1 11/5/2014 Gr. Alpha 11.77 +/- 1.73 12.18 +/- 1.62 11.98 +/- 1.19 Pass S0-6500,1 11/5/2014 Gr. Beta 26.69 +/- 1.62 24.19 +/- 1.13 25.44 +/- 0.99 Pass S0-6500,1 11/5/2014 U"233/4 0.14 +/- 0.04 0.14 +/- 0.05 0.14 +/- 0.03 Pass S0-6500,1 11/5/2014 U-238 0.18 +/- 0.05 0.13 +/- 0.04 0.15 +/- 0.03 Pass S0-6500,1 11/5/2014 Th-228 0.47 +/- 0.11 0.34 +/- 0.06 0.41 +/- 0.06 Pass S0-6500,1 11/5/2014 Th-230 0.38 +/- 0.07 0.29 +/- 0.05 0.34 +/- 0.04 Pass S0-6500,1 11/5/2014 Th-232 0.41 +/- 0.08 0.41 +/- 0.06 0.41 +/- 0.05 Pass S0-6500,1 11/5/2014 Bi-214 0.75 +/- 0.02 0.78 +/- 0.02 0.77 +/- 0.01 Pass S0-6500,1 11/5/2014 Pb-214 0.78 +/- 0.08 0.86 +/- 0.09 0.82 +/- 0.06 Pass S0-6500,1 11/5/2014 Ac-228 1.02 +/- 0.11 1.13+/-0.13 1.08 +/- 0.09 Pass S0-6500,1 11/5/2014 Cs-137 0.40 +/- 0.01 0.39 +/- 0.01 0.39 +/- 0.01 Pass DW-50262,3 11/10/2014 Gr. Alpha 8.95 +/- 1.26 7.84 +/- 1.24 8.40 +/- 0.88 Pass DW-50264,5 11/10/2014 Ra-226 3.89 +/- 0.24 3.71 +/- 0.20 3.80 +/-0.16 Pass DW-50264,5 11/10/2014 Ra-228 2.96 +/- 0.63 2.33 +/- 0.59 2.65 +/- 0.43 Pass AP-120214NB 12/2/2014 Gr. Beta 0.03 +/- 0.00 0.03 +/- 0.00 0.03 +/- 0.00 Pass AP-120814NB 12/8/2014 Gr. Beta 0.03 +/- 0.01 0.03 +/- 0.01 0.03 +/- 0.00 Pass SG-7068,9 12/19/2014 Pb-214 4.27 +/- 0.23 4.38 +/- 0.33 4.33 +/- 0.20 Pass SG-7068,9 12/19/2014 Ac-228. 2.72 +/- 0.36 3.27 +/- 0.49 3.00 +/- 0.30 Pass S-7152,3 12/25/2014 K-40 20.83 +/- 0.88 20.16 +/- 0.62 20.49 +/- 0.54 Pass A5-5

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

Concentration a Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAW-1140 2/1/2014 Gr. Alpha 0.77 +/- 0.06 0.85 0.26 - 1.44 Pass MAW-1140 2/1/2014 Gr. Beta 4.31 +/- 0.08 4.19 2.10-6.29 Pass MAW-1142 2/1/2014 1-129 -0.01 +/- 8.00 0.00 NA Pass MAW-1184 2/1/2014 Fe-55 0.40 +/- 3.20 0.00 -0.01 -2.00 Pass MAW-1184 2/1/2014 H-3 345.10 +/- 10.60 321.00 225.00-417.00 Pass MAW-1184 2/1/2014 Ni-63 32.40 +/- 3.20 34.00 23.80 - 44.20 Pass MAW-.1184 1 2/1/2014 Pu-238 1.28 +/-0.12 0.83 0.58 - 1.08 Fail MAW-1184 1 2/1/2014 Pu-239/240 0.91 +/- 0.10 0.68 0.47 - 0.88 Fail MAW-1184 2/1/2014 Sr-90 7.00 +/-0.70 8.51 5.96 -11.06 Pass MAW-1184 2/1/2014 Tc-99 8.10 +/- 0.60 10.30 7.20 -13.40 Pass MAW-1184 2/1/2014 U-233/234 0.20 +/-0.07 0.23 0.16-0.29 Pass MAW-1184 2/1/2014 U-238 1.25 +/- 0.18 1.45 1.02 -1.89 Pass MAW-1184 2/1/2014 Co-57 27.86 +/- 0.38 27.50 19.30 - 35.80 Pass MAW-1184 2/1/2014 Co-60 15.99 +/- 0.27 16.00 11.20 - 20.80 Pass MAW-1184 2/1/2014 Cs-134 21.85 +/- 0.54 23.10 16.20 - 30.00 Pass MAW-1184 2/1/2014 Cs-137 28.74 +/- 0.49 28.90 20.20 - 37.60 Pass MAW-1184 2/1/2014 K-40 1.80 +/- 2.00 0.00 0.00- 10.00 Pass MAW-1184 2/1/2014 Mn-54 14.06 +/- 0.40 13.90 9.70 -18.10 Pass MAW-1184 2/1/2014 Zn-65 0.00 +/- 0.19 0.00 -0.01 - 0.00 Pass MAVE-1148 2/1/2014 Co-57 11.63+/-0.19 10.10 7.10 -13.10 Pass MAVE-1148 2/1/2014 Co-60 7.28 +/- 0.18 6.93 4.85 - 9.01 Pass MAVE-1148 2/1/2014 Cs-134 6.29 +/- 0.29 6.04 4.23 - 7.85 Pass MAVE-1148 2/1/2014 Cs-137 5.18 +/-0.20 4.74 3.32-6.16 Pass MAVE-1148 2/1/2014 Mn-54 9.22 +/- 0.26 8.62 6.03 -11.21 Pass MAVE-1148 2/1/2014 Zn-65 8.59 +/- 0.40 7.86 5.50- 10.22 Pass MAAP-1151 2/1/2014 Am-241 0.09 +/- 0.02 0.09 0.06-0.12 Pass MAAP-1151 d 2/1/2014 Co-57 1.60 +/-0.05 0.00 NA Fail MAAP-1151 2/1/2014 Co-60 1.38 +/- 0.08 1.39 0.97 - 1.81 Pass MAAP-1151 2/1/2014 Cs-134 1.75 +/-0.11 1.91 1.34 - 2.48 Pass MAAP-1151 2/1/2014 Cs-137 1.81 +/-0.10 1.76 1.23-2.29 Pass MAAP-1151 2/1/2014 Mn-54 0.01 +/- 0.03 0.00 NA Pass 1

MAAP-1151 2/1/2014 Pu-238 0.08 +/- 0.02 0.00 NA Fail MAAP-1151 2/1/2014 Pu-239/240 0.10 +/- 0.02 0.08 0.05-0.10 Pass MAAP-1151 2/1/2014 Zn-65 -0.24 +/- 0.09 0.00 -0.50 - 1.00 Pass A6-1

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

Concentration a Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-1151 2/1/2014 U-233/234 0.03 +/- 0.01 0.02 0.01 -0.03 Pass MAAP-1151 2/1/2014 U-238 0.13 +/- 0.02 0.13 0.09 - 0.17 Pass MAAP-1151 2/1/2014 Sr-90 1.11 +/- 0.14 1.18 0.83- 1.53 Pass MAAP-1154 2/1/2014 Gr. Alpha 0.56 +/- 0.06 1.77 0.53-3.01 Pass MAAP-1154 2/1/2014 Gr. Beta 0.98 +/- 0.06 0.77 0.39 - 1.16 Pass MAS0-1146 2/1/2014 Co-57 1064.50 +/- 3.60 966.00 676.00- 1256.00 Pass MAS0-1146 2/1/2014 Co-60 1.70 +/- 0.50 1.22 NA

Pass MAS0-1146 9 2/1/2014 Cs-134 6.10 +/- 1.80 0.00 NA Fail MAS0-1146 2/1/2014 Cs-137 1364.30 +/- 5.30 1238.00 867.00- 1609.00 Pass MAS0-1146 2/1/2014 K-40 728.90 +/- 15.90 622.0p 435.00 - 809.00 Pass MAS0-1146 2/1/2014 Mn-54 1588.00 +/- 6.00 1430.00 1001.00 - 1859.00 Pass MAS0-1146 2/1/2014 Zn-65 763.50 +/- 6.80 695.00 487.00 - 904.00 Pass MAS0-1146 2/1/2014 Am-241 68.20 +/- 9.00 68.00 47.60 - 88.40 Pass MAS0-1146 2/1/2014 Ni-63 4.80 +/- 15.30 0.00 NA Pass MAS0-1146 r 2/1/2014 Pu-238 140.60 +/- 15.50 96.00 67.00- 125.00 Fail MAS0-1146 r 2/1/2014 Pu-239/240 102.00 +/- 13.10 76.80 53.80 - 99.80 Fail MAS0-1146 2/1/2014 Sr-90 1.23 +/- 1.37 0.00 NA Pass MAS0-1146 2/1/2014 Tc-99 -0.30 +/- 12.00 0.00 NA Pass MAS0-1146h 2/1/2014 U-233/234 22.90 +/- 3.00 81.00 57.00- 105.00 Fail MAS0-1146h 2/1/2014 U-238 32.00 +/- 3.60 83.00 58.00- 108.00 Fail MAS0-4439 8/1/2014 Am-241 65.90 +/- 6.70 85.50 59.90 - 111.20 Pass MAS0-4439 8/1/2014 Ni-63 771.62 +/- 23.29 980.00 686.00- 1274.00 Pass MAS0-4439 8/1/2014 Pu-239/240 55.63 +/- 5.81 58.60 41.00 - 76.20 Pass MAS0-4439 8/1/2014 Sr-90 778.34 +/- 17.82 858.00 601.00 -1115.00 Pass MAS0-4439 8/1/2014 Tc-99 458.20 +/- 9.20 589.00 412.00-766.00 Pass MAS0-4439 8/1/2014 cs-134 520.60 +/- 7.09 622.00 435.00 - 809.00 Pass MAS0-4439 8/1/2014 Co-57 1135.00 +/- 7.40 1116.00 781.00 -1451.00 Pass MAS0-4439 8/1/2014 Co-60 768.20 +/- 7.70 779.00 545.00 - 1013.00 Pass MAS0-4439 8/1/2014 Mn-54 1050.70 +/- 12.60 1009.00 706.00- 1312.00 Pass MAS0-4439 8/1/2014 Zn-65 407.89 +/- 15.03 541.00 379.00 - 703.00 Pass MAW-4431 8/1/2014 Am-241 0.79 +/- 0.08 0.88 0.62 - 1.14 Pass MAW-4431 8/1/2014 Cs-137 18.62 +/- 0.54 18.40 12.90-23.90 Pass MAW-4431 8/1/2014 Co-57 24.85 +/- 0.42 24.70 17.30-32.10 Pass MAW-4431 8/1/2014 Co-60 12.27 +/- 0.38 12.40 8.70 -16.10 Pass MAW-4431 8/1/2014 H-3 207.20 +/- 10.60 208.00 146.00 -270.00 Pass MAW-4431; 8/1/2014 Fe-55 55.10 +/- 14.80 31.50 22.1 0 - 41.00 Fail MAW-4431 8/1/2014 Mn-54 14.36 +/- 0.53 14.00 9.80 - 18.20 Pass MAW-4431 8/1/2014 Zn-65 11.46 +/- 0.78 10.90 7.60 - 14.20 Pass.

A6-2

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

Concentration "

Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAW-4431 8/1/2014 Tc-99 6.10 +/- 0.50 6.99 4.89-9.09 Pass MAW-4431 8/1/2014 Pu-238 0.59 +/- 0.07 0.62 0.43 -0.80 Pass MAW-4431 8/1/2014 U-233/234 0.22 +/- 0.04 0.21 0.14-0.27 Pass MAW-4431 8/1/2014 U-238 1.25 +/- 0.10 1.42 0.99 -1.85 Pass MAW-4493 8/1/2014 Gr. Alpha 0.93 +/- 0.07 1.40 0.42 -2.38 Pass MAW-4493 8/1/2014 Gr. Beta 6.31 +/- 1.35 6.50 3.25 -9.75 Pass MAAP-4433 8/1/2014 Am-241 0.06 +/- 0.02 0.07 0.05-0.09 Pass MAAP-4433 8/1/2014 Pu-238 0.10 +/- 0.03 0.11 0.08 -0.14 PqSS MAAP-4433 8/1/2014 Pu-239/240 0.04 +/- 0.02 0.05 0.03-0.06 Pass MAAP-4433 8/1/2014 Sr-90 0.74 +/- 0.10 0.70 0.49 - 0.91 Pass MAAP-4433 8/1/2014 U-233/234 0.03 +/- 0.01 0.04 0.03-0.05 Pass MAAP-4433 8/1/2014 U-238 0.21 +/- 0.03 0.25 0.18-0.33 Pass MAAP-4444 8/1/2014 Sr-89 7.82 +/- 0.52 9.40 6.60 -12.20 Pass MAAP-4444 8/1/2014 Sr-90 0.76 +/-0.10 0.76 0.53-0.99 Pass MAVE-4436 8/1/2014 Cs-134 7.49 +/- 0.18 7.38 5.17-9.59 Pass MAVE-4436 8/1/2014 Co-57 11.20 +/- 0.19 9.20 6.40 - 12.00 Pass MAVE-4436 8/1/2014 Co-60 6.84 +/- 0.17 6.11 4.28 -7.94 Pass MAVE-4436 8/1/2014 Mn-54 8.11 +/- 0.26 7.11 4.97-9.23 Pass MAVE-4436 8/1/2014 Zn-65 7.76 +/- 0.43 6.42 4.49 -8.35 Pass

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 Interference from Eu-152 resulted in misidentification of Co-57.

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

r The high bias on the plutonium crosscheck samples was traced to contamination from a newly purchased standard.

The results of reanalysis with replacement tracer purchased from NIST:

MAW-1184 Pu-238 0.68 +/-0.10 BqiL MAW-1184 Pu-239/240 0.66 +/- 0.10 Bq I L MAS0-1146 Pu-238 95.15 +/-8.98 Bq I kg MAS0-1146 Pu-239/240 67.21 +/- 7.54 Bq /kg Insufficient sample remained to reanalyze the Air filter sample(MAAP-1151). High bias results due to same contaminated tracer 9 False positive test. Long sample counting time lead to interference from naturaling occuring Bi-214 in sample matrix with a close spectral energy.

h 80% of participating laboratories were outside the acceptable range.

Parallel reanalysis was run on ERA spiked sample with acceptable results.

Result of reanalysis Fe-55 32.63 +/- 16.30 Bq I L A6-3

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

Concentration (pCi/L) b Lab Code b Date Analysis Laboratory ERA Control Result c Result d Limits Acceptance ERAP-1044 3/17/2014 Am-241 54.2 +/- 3.0 59.7 36.8-80.8 Pass ERAP-1044 3/17/2014 Co-60 1177.9 +/- 14.3 1120.0 867.0 - 1400.0 Pass ERAP-1044 3/17/2014 Cs-134 1010.5 +/- 15.8 1010.0 643.0 - 1250.0 Pass ERAP-1044 3/17/2014 Cs-137 938.3 +/- 45.7 828.0 622.0 - 1090.0 Pass c ERAP-1044 3/17/2014 Fe-55 142.3 +/- 87.3 240.0 74.4 -469.0 Pass ERAP-1044 3/17/2014 Gr. Alpha 52.3 +/- 0.5 46.0 15.4 -71.4 Pass ERAP-1044 3/17/2014 Gr. Beta 64.4 +/- 2.6 53.8 34.0-78.4 Pass ERAP-1044 3/17/2014 Mn-54 < 4.9 0.0 NA Pass ERAP-1044 3/17/2014 Pu-238 63.0 +/- 2.6 56.3 38.6 -74.0 Pass ERAP-1044 3/17/2014 Pu-239/240 52.8 +/- 1.9 48.6 35.2-63.5 Pass ERAP-1044 3/17/2014 Sr-90 81.4 +/- 1.6 78.9 38.6 - 118.0 Pass ERAP-1044 3/17/2014 U-233/234 30.4 +/- 1.7 36.4 22.6-54.9 Pass ERAP-1044 3/17/2014 U-238 30.4+/-1.4 36.1 23.3-49.9 Pass ERAP-1044 3/17/2014 Uranium 62.0 +/- 3.5 74.3 41.1 -113.0 Pass ERAP-1044 3/17/2014 Zn-65 852.2 +/- 26.1 667.0 478.0 - 921.0 Pass ERS0-1050 3/17/2014 Am-241 426.6 +/- 155.5 399.0 233.0 - 518.0 Pass ERS0-1050 3/17/2014 Ac-228 1260.0 +/- 107.0 1240.0 795.0 -1720.0 Pass ERS0-1050 3/17/2014 Bi-212 1331.9 +/- 309.7 1240.0 330.0 - 1820.0 Pass ERS0-1050 3/17/2014 Bi-214 1804.5 +/- 50.4 1960.0 1180.0 -2820.0 Pass ERS0-1050 3/17/2014 Co-60 6738.8 +/- 167.6 6830.0 4620.0 - 9400.0 Pass ERS0-1050 3/17/2014 Cs-134 3262.9 +/- 108.8 3390.0 2220.0 - 4070.0 Pass ERS0-1050 3/17/2014 Cs-137 8538.6 +/- 55.0 8490.0 6510.0 -10900.0 Pass ERS0-1050 3/17/2014 K-40 11241.3 +/-296.6 10500.0 7660.0 -14100.0 Pass ERS0-1050 3/17/2014 Mn-54 < 21.6 0.0 NA Pass ERS0-1050 3/17/2014 Pb-212 1119.6 +/-26.1 1240.0 812.0- 1730.0 Pass ERS0-1050 3/17/2014 Pb-214 1861.7 +/-54.9 2070.0 1210.0 - 3090.0 Pass ERS0-1050 e 3/17/2014 Pu-238 1085.5 +/- 167.7 578.0 348.0 - 797.0 Fail ERS0-1050 e 3/17/2014 Pu-239/240 681.6 +/- 128.6 471.0 308.0 - 651.0 Fail ERS0-1050 3/17/2014 Sr-90 2338.0 +/- 144.0 2780.0 1060.0 - 4390.0 Pass ERS0-1050 3/17/2014 Th-234 3474.9 +/- 226.0 3360.0 1060.0-6320.0 Pass ERS0-1050 3/17/2014 U-233/234 3319.5 +/- 250.2 2780.0 1060.0-4390.0 Pass ERS0-1050 3/17/2014 U-238 3375.6 +/- 252.6 3360.0 2080.0 -4260.0 Pass ERS0-1050 3/17/2014 Uranium 6810.6 +/-551.1 6910.0 3750.0-9120.0 Pass ERS0-1050 3/17/2014 Zn-65 5968.0 +/- 226.1 5400.0 4300.0-7180.0 Pass A7-1

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

Concentration (pCi/L) b Lab Code b Date Analysis Laboratory ERA Control Result c Result d Limits Acceptance ERVE-1051 3/17/2014 Am-241 1532.0 +/- 149.5 1490.0 911.0 - 1980.0 Pass ERVE-1051 3/17/2014 Cm-244 519.8 +/- 94.6 516.0 253.0 - 804.0 Pass ERVE-1051 3/17/2014 Co-60 981.2 +/- 41.8 926.0 639.0 - 1290.0 Pass ERVE-1051 3/17/2014 Cs-134 701.4 +/- 58.6 646.0 415.0-839.0 Pass ERVE-1051 3/17/2014 Cs-137 961.9 +/- 46.3 880.0 638.0 - 1220.0 Pass ERVE-1051 3/17/2014 K-40 32789.7 +/- 758.2 31900.0 23000.0 - 44800.0 Pass ERVE-1051 3/17/2014 Mn-54 < 25.9 0.0 NA Pass ERVE-1051 3/17/2014 Pu-238 2724.1 +/- 259.4 2110.0 1260.0 -2890.0 Pass ERVE-1051 3/17/2014 Pu-239/240 4361.4 +/- 323.4 3740.0 2300.0-5150.0 Pass ERVE-1051 3/17/2014 Sr-90 2405.7 +/- 263.2 2580.0' 1470.0 - 3420.0 Pass ERVE-1051 3/17/2014 U-233/234 1612.2 +/- 162.0 1760.0 1160.0 - 2260.0 Pass ERVE-1051 3/17/2014 U-238 1574.3 +/- 159.6 1750.0 1170.0 - 2220.0 Pass ERVE-1051 3/17/2014 Uranium '3255.4 +/- 356.7 3580.0 2430.0 - 4460.0 Pass ERVE-1051 3/17/2014 Zn-65 1124.1 +/- 101.2 919.0 663.0 - 1290.0 Pass ERW-1054 3/17/2014 Am-241 104.6 +/- 3.4 114.0 76.8 - 153.0 Pass ERW-1054 3/17/2014 Co-60 1195.2 +/- 18.9 1270.0 1100.0 -1490.0 Pass ERW-1054 3/17/2014 Cs-134 1474.9 +/- 47.5 1660.0 1220.0 - 1910.0 Pass ERW-1054 3/17/2014 Cs-137 2591.0 +/- 23.4 2690.0 2280.0 - 3220.0 Pass ERW-1054 3/17/2014 Mn-54 < 4.3 0.0 NA Pass ERW-1054 3/17/2014 Pu-238 54.1 +/- 3.6 44.1 32.6-54.9 Pass ERW-1054 3/17/2014 Pu-239/240 185.9 +/- 17.6 160.0 124.0 -202.0 Pass ERW-1054 3/17/2014 U-233/234 74.8 +/- 6.3 82.4 61.9-106.0 Pass ERW-1054 3/17/2014 U-238 76.4 +/- 7.8 81.8 62.4 - 100.0 Pass ERW-1054 3/17/2014 Uranium 154.3 +/- 14.6 168.0 123.0-217.0 Pass ERW-1054 3/17/2014 Zn-65 1818.5 +/- 56.4 1800.0 1500.0 -2270.0 Pass 1

ERW-1055 3/17/2014 Fe-55 636.3 +/- 176.0 1200.0 716.0 - 1630.0 Fail ERW-1055 3/17/2014 Gr. Alpha 120.9 +/- 3.5 133.0 47.2-206.0 Pass ERW-1055 3/17/2014 Gr. Beta 141.6 +/- 2.3 174.0 99.6-258.0 Pass ERW-1055 3/17/2014 Sr-90 873.9 +/- 56.9 890.0 580.0 - 1180.0 Pass ERW-1060 3/17/2014 H-3 5818.0 +/- 230.0 5580.0 3740.0 -7960.0 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

Laboratory codes as follows: ERW (water), ERAP (air filter), ERSO (soil), ERVE (vegetation). Results are reported in units of pCiiL, except for air filters (pCiiFilter), vegetation and soil (pCilkg).

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

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

The high bias on the plutonium crosscheck samples was traced to contamination from a newly purchased standard.

The results of reanalysis with replacement tracer purchased from NIST:

ERS0-1050 Pu-238 634.7 +/- 98.50 Bq I kg ERS0-1050 Pu-2391240 451.8 +/- 82.80 Bq I kg

'An error in the efficiency calculation was found. The result of recalculation was 932 pCiiL.

The sample was repeated, result of reanalysis, 1066 pCiiL.

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

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

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

3.1 Individual results: For two analysis results; x 1 +/- s1 and x 2 +/- s2 Reported result: x +/- s; where x = (1/2) (x 1 + x2) and s = (1/2) ~ s 12 + si 3.2. Individual results: < L1 , < L2 Reported result: < L, where L = lower of L 1 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 ~nnual standard deviation would not be the average of quarterly standard deviations. The average x and standard deviation "s" of a set of n numbers x 1 , x 2 . . . xn are defined as follows:

x =n1 2:x 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 report~d.

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, f1.443 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 lodine-131 2.8 X 10 Cesium-137 1,000 Barium-140 8,000 lodine-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

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APPENDIX E Ground Water Monitoring Well Samples E-1

1.0 INTRODUCTION

This appendix to the Radiological Environmental Monitoring Program Annual Report to the United States Nuclear Regulatory Commission summarizes and interprets results of the Ground Water Monitoring Program samples taken at the Monticello Nuclear Plant, Monticello, Minnesota, during the period January - December 2014. This sampling program was established in October of 2006 following the industry initiative on ground water monitoring.

Complete data tables for each period and sampling location, are provided in a reference document, (Environmental, Inc., Midwest Laboratory, "Complete Analyses Data Tables, January - December, 2014") available at the Monticello Nuclear Generating Plant, Chemistry and Radiation Protection Department.

E-2

2.0

SUMMARY

The Ground Water Sampling Program was established following industry events where tritium was discovered in ground water surrounding commercial nuclear facilities. This program is described and the results for 2014 are summarized and discussed.

Program findings for 2014 detected low levels of tritium in monitoring wells located on the plant property. With the exception of monitoring wells MW-9A and MW-13A, tritium measured at or near expected natural background levels. No tritium was detected in four samples of storm water runoff collected from storm water outfall sample point SD-006 or the two samples collected from the sewer lift station. The 2014 sample results (excluding MW-9A and MW-13A) all measured below the required limit of 500 pCi/L. Measurements for 2014 were below the Environmental Protection Agency's drinking water standard of 20,000 pCi/L and present no harm to members of the public.

None of the samples monitored for gamma-emitting isotopes showed activity greater than the LLD.

A summation of the analytical data for both ground water monitoring wells and storm water runoff samples is provided in Table E-3.

E-3

3.0 Ground Water Sampling Program 3.1 Program Design and Data Interpretation The purpose of this sampling program is to assess the impact of any tritium leaching into the environment (ground water system) from MNGP. For this purpose, water samples are collected and analyzed for tritium content.

3.2 Program Description The sampling and analysis schedule for the Ground Water Monitoring Program is summarized in Table E-1 and briefly reviewed below. Table E-2 defines the additional sample locations and codes for the Ground Water Sampling Program.

Sampling from the groundwater monitoring wells was conducted monthly at fourteen locations and quarterly for five locations.

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

Additional analyses for gamma emitting isotopes were performed on samples from each of the nineteen monitoring wells. The results are summarized in Table E-3. Results of individual analyses are reported in Table E-4.

3.4 Program Modifications There were no additional on-site monitoring wells added to the ground water program in 2014.

E-4

3.5 Results and Discussions Sampling points in North America have shown tritium concentrations in precipitation may range from 5 pCi/L to 157 pCi/L (Environmental Isotope Data No. 10; World Survey of Isotope Concentration in Precipitation (1988-1991). Results obtained show tritium in ground water samples at or near expected natural background levels, with the exception of monitoring wells, MW-9A and MW-13A.

Excluding the data from wells MW-9A and MW-13A and SD-006, 2014 sample results all measured below an LLD level of 500 pCi!L, and were similar to averages measured in 2013.

The average for 2014 at location MW-9A was 3296 pCi/L which is a decline from the 2013 average of 5457 pCi/L. The highest level that was observed in 2014 was 5911 pCi/L for the November 2014 sample. Three of the monthly samples were below the LLD of 500 pCi/L. *Previous investigations have concluded the activity may be due to a 1981 spill from the Condensate Storage Tanks that had infiltrated the surface and migrated towards MW-9.

The tritium levels observed at location MW-13A for 2014 ranged from a high of 935 pCi/L in January, fell to 715 pCi/L in February, then stayed below 600 pCi/L for the remainder of the first half of the year and then below the LLD of 500 pCi/L for the remainder of the year..

None of the groundwater samples analyzed for gamma-emitting isotopes showed activity greater than LLD.

E-5

Table E-1. Sample Collection and Analysis Program, Ground Water.

Medium Number Sample Codes Collection type Analysis Type Ground Water 35 MW-1, MW-2, MW-3, MW-4, Grab H-3 Quarterly MW-98, MW-11, MW-12A, MW-128, Ground Water 79 MW-9A, MW-10, MW-13A, Grab H-3 Monthly MW-138, MW-14, MW-15A MW-158, Ground Water 79 MW-5, MW-6, MW-7, MW-8 Grab H-3 Annual Table E-2. Sampling locations for Ground Water Monitoring Wells.

Sample Type Vendor Well Distance from Compass Sector Code Number Stack (miles) Heading from Stack Ground Water M-33 MW-1 0.11 299 WNW Ground Water M-34 MW-2 0.14 301 WNW Ground Water M-35 MW-3 0.15 305 NW Ground Water M-36 MW-4 0.1 25 NNE Ground Water M-37 MW-5 0.1 253 WSW Ground Water M-38 MW-6 229 Feet 228 sw Ground Water M-39 MW-7 0.2 66 ENE Ground Water M-40 MW-8 0.3 150 SSE Ground Water M-44 MW-9A 0.1 310 NW Ground Water M-51 MW-98 0.1 310 NW Ground Water M-45 MW-10 0.1 292 WNW Ground Water M-46 MW-11 0.1 283 WNW Ground Water M-47 MW-12A 0.1 330 NW Ground Water M-48 MW-128 0.1 326 NW Ground Water M-49 MW-13A 0.12 316 NW Ground Water M-50 MW-138 0.12

- 316 NW Ground Water M-52 MW-14 0.17 306 NW Ground Water M-53 MW-15A 0.14 14 NNE Ground Water M-54 MW-158 0.14 14 NNE E-6

Table E-3. Ground Water Monitoring Program Summary.

Name of Facility Monticello Nuclear Generating Plant Docket No. .::.5..:.0-.::.2:.:.6..:.3_ _ _ _ _ __

Location of Facility Wright, Minnesota Reporting Period January-December, 2014

( County, State )

Indicator Location with Highest Control Number Sample Type and Locations Annual Mean Locations Non-Type Number of LLDb Mean (F)" Mean (F)c Mean (F)c Routine (Units) Analyses* Rangec Locationd Range< Range< Results*

Groundwater H-3 118 500 2227 (15/118) MW-9A, On-site, 3286 (9/12) none 0 Monitoring Wells - (505-5911) 0.1 mi@ 310°/NW (1057-5911)

(pCi/L)

Stormwater H-3 4 500 604 (1/4) SD-006 - none 0 Runoff On-site (pCi/L) GS 4 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 1-131 30 < LLD - - none 0 Cs-134 10 < LLD - - none 0 Cs-137 10 < LLD - - none 0 Ba-La-140 15 < LLD - - none 0 Ce-144 43 < LLD - - none 0 Sewer lift H-3 2 500 < LLD - - - none 0 Station (pCi/L) GS 2 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 1-131 30 < LLD - - none 0 Cs-134 10 < LLD - - none 0 Cs-137 10 < LLD - - none 0 Ba-La-140 15 < LLD - - none 0 Ce-144 43 < LLD - - none 0

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.

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 ~~perational value for the medium or location.

MISSISSIPPI RIVER 904.40 (September ()9, 2009)

Figure E-1. Sample collection and analysis program: Ground water, On-site monitoring well locations.

E-8

Table E-4. Ground water, analyses for tritium and gamma-emitting isotopes.

Collection Concentration (pCi/L)

Lab Code Date 3H 54Mn ssFe ssco so co 65 Zn 95 ZrNb 134Cs 137Cs 14oBala 144Ce Monitoring Well #1 (M-33)

MWW- 785 02/20/14 < 146 < 10 < 30 < 10 < 10 < 30 < 15 < 10 <10 < 15 < 24 MWW- 2526 05/27/14 167 +/- 81 < 10 < 30 < 10 < 10 < 30 < 15 < 10 <10 < 15 < 23 MWW- 4538 08/28/14 < 146 < 10 < 30 < 10 < 10 < 30 < 15 < 10 <10 < 15 < 25 MWW- 6764 11/21/14 < 170 < 10 < 30 <10 < 10 < 30 < 15 < 10 <10 < 15 < 23 Monitoring Well #2 (M-34)

MWW- 787 02/26/14 150 +/- 84 < 10 < 30 < 10 < 10 < 30 <15 <10 <10 < 15 < 28 MWW- 2527 05/29/14 < 145 < 10 < 30 < 10 < 10 < 30 < 15 < 10 <10 < 15 < 22 MWW- 4539 08/28/14 < 153 < 10 < 30 <10 < 10 < 30 <15 < 10 <10 < 15 < 24 MWW- 6748 11/21/14 240 +/- 98 < 10 < 30 <10 < 10 < 30 < 15 < 10 <10 < 15 < 23 Monitoring Well #3 (M-35)

MWW- 788 02/26/14 150 +/- 78 < 10 < 30 <10 < 10 < 30 <15 < 10 <10 < 15 < 27 MWW- 2528 05/29/14 < 145 <10 < 30 <10 <10 < 30 <15 < 10 <10 < 15 < 20 MWW- 4540 08/28/14 169 +/- 89 <10 < 30 <10 <10 < 30 <15 < 10 <10 < 15 < 48 MWW- 6749 11/21/14 255 +/- 99 <10 < 30 < 10 < 10 < 30 < 15 < 10 <10 < 15 < 20 Monitoring Well #4 (M-36)

MWW- 789 02/26/14 < 142 < 10 < 30 < 10 <10 < 30 < 15 < 10 <10 < 15 < 27 MWW- 2529 05/27/14 < 145 < 10 < 30 < 10 <10 < 30 < 15 < 10 <10 < 15 < 35 MWW- 4541 08/28/14 < 146 < 10 < 30 < 10 <10 < 30 < 15 < 10 <10 < 15 <14 MWW- 6765 11/21/14 186 +/- 94 < 10 < 30 < 10 <10 < 30 < 15 < 10 <10 <15 < 22 Monitoring Well #5 (M-37)

MWW- 4542 08/27/14 < 153 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 <15 < 37 Monitoring Well #6 (M~38)

MWW- 4544 08/27/14 < 177 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 39 Monitoring Well #7 (M-39)

MWW- 4545 08/27/14 < 177 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 29 Monitoring Well #8 (M-40)

MWW- 4546 08/27/14 < 177 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 21

Table E-4. Ground water, analyses for tritium and gamma-emitting isotopes (continued).

Collection Concentration (pCi/L)

Lab Code Date 3H 54 Mn 59 Fe ssco so co sszn 9szrNb 134Cs 137Cs 14oBala 144Ce Monitoring Well #9A (M-44}

MWW- 319 01/27/14 1057 +/- 121 MWW- 790 02/24/14 1117 +/- 118 <10 < 30 < 10 <10 < 30 < 15 <10 < 10 < 15 < 27 MWW- 1113 03/20/14 1479 +/- 131 MWW- 1659 04/22/14 182 +/- 82 MWW- 2530 05/29/14 165 +/- 81 <10 < 30 <10 < 10 < 30 < 15 <10 <10 < 15 < 20 MWW- 2901 06/18/14 346 +/- 90 MWW- 3857 07/28/14 2997 +/- 163 MWW- 5406 08/29/14 3802 +/- 203 <10 < 30 < 10 < 10 < 30 < 15 <10 <10 < 15 <10 MWW- 5408 09/18/14 4028 +/- 208 MWW- 6021 10/21/14 5158 +/- 229 MWW- 6750 11/20/14 5911 +/- 279 < 10 < 30 < 10 <10 < 30 < 15 <10 < 10 <15 < 27 MWW- 7232 12/22/14 4024 +/- 191 Monitoring Well #98 (M-51}

MWW-791 02/24/14 < 142 <10 < 30 < 10 <10 < 30 < 15 <10 < 10 <15 < 23 MWW- 2531 05/29/14 316 +/- 88 <10 < 30 < 10 <10 <30 < 15 <10 <10 < 15 < 33 MWW- 5407 08/29/14 < 159 <10 < 30 < 10 < 10 < 30 < 15 <10 <10 <15.4 < 14 a MWW- 6751 11/20/14 < 170 < 10 < 30 < 10 < 10 < 30 < 15 <10 <10 < 15 < 25 Monitoring Well #1 0 (M-45}

MWW- 345 01/24/14 376 +/- 97 MWW- 792 02/20/14 278 +/- 85 <10 < 30 < 10 <10 < 30 < 15 <10 <10 <15 < 23 MWW- 1132 03/21/14 229 +/- 84 MWW- 1660 04/22/14 283 +/- 87 MWW- 2532 05/29/14 332 +/- 89 <10 < 30 <10 < 10 < 30 < 15 <10 <10 < 15 < 22 MWW- 2903 06/18/14 216 +/- 84 MWW- 3907 07/29/14 273 +/- 77 MWW- 4547 08/28/14 426 +/- 104 <10 < 30 < 10 <10 < 30 < 15 <10 <10 <15 < 40 MWW- 4962 09/18/14 315 +/- 96 MWW- 5944 10/21/14 331 +/- 95 MWW- 6752 11/21/14 396 +/- 107 <10 < 30 < 10 < 10 < 30 < 15 <10 < 10 <15 < 18 MWW- 7175 12/24/14 210 +/- 105 Monitoring Well #11 (M-46}

MWW- 793 02/20/14 < 142 <10 < 30 < 10 <10 < 30 < 15 <10 < 10 <15 <18 MWW- 2533 05/29/14 150 +/- 80 <10 < 30 < 10 < 10 < 30 < 15 <10 < 10 <15 < 43 MWW- 4548 08/28/14 < 177 <10 < 30 < 10 < 10 < 30 <15 <10 < 10 <15 < 25 MWW- 6766 11/21/14 < 170 <10 < 30 < 10 < 10 < 30 < 15 <10 < 10 <15 < 33 Monitoring Well #12A (M-47}

MWW- 794 02/20/14 < 142 <10 < 30 < 10 <10 < 30 < 15 <10 <10 < 15 < 20 MWW- 2534 05/27/14 < 145 < 10 < 30 < 10 < 10 < 30 < 15 <10 <10 <15 < 20 MWW- 4549 08/27/14 < 177 <10 < 30 < 10 <10 < 30 <15 <10 <10 < 15 < 25 MWW- 6767 11/21/14 < 170 <10 < 30 < 10 < 10 < 30 < 15 <10 < 10 <15 < 23 a LLD not reached due to age of sample and small sample size; sample counted 60,000 seconds.

E-10

Table E-4. Ground water, analyses for tritium and gamma-emitting isotopes (continued).

Collection Concentration {pCi/L)

Lab Code Date 3H S4Mn S9Fe seco so co sszn 9szrNb 134Cs 137Cs 14o8ala 144Ce Monitoring Well #128 (M-48}

MWW- 795 02/20/14 < 142 < 10 < 30 <10 < 10 < 30 <15 <10 <10 <15 < 28 MWW- 2535 05/27/14 < 145 < 10 < 30 <10 < 10 < 30 <15 <10 < 10 <15 < 28 MWW- 4550 08/27/14 < 177 <10 < 30 <10 < 10 < 30 <15 < 10 < 10 <15 < 15 MWW- 6754 11/21/14 < 170 < 10 < 30 <10 < 10 < 30 <15 <10 <10 <15 < 34 Monitoring Well #13A (M-49}

MWW- 346 01/24/14 935 +/- 118 MWW- 796 02/26/14 715 +/- 103 <10 < 30 <10 < 10 < 30 <15 <10 < 10 <15 < 30 MWW- 1133 03/21/14 553 +/- 98 MWW- 1661 04/22/14 505 +/- 96 MWW- 2536 05/27/14 565 +/- 99 < 10 < 30 <10 < 10 < 30 <15 <10 < 10 <15 < 23 MWW- 2904 06/18/14 565 +/- 100 MWW- 3908 07/29/14 239 +/- 75 MWW- 4551 08/28/14 < 177 < 10 < 30 ' <10 <10 < 30 <15 < 10 < 10 <15 < 39 MWW- 4963 09/18/14 262 +/- 93 MWW- 5945 10/21/14 < 148 MWW- 6768 11/21/14 < 170 < 10 < 30 < 10 <10 < 30 <15 < 10 < 10 <15 < 20 MWW- 7176 12/24/14 < 175 Monitoring Well #138 (M-50}

MWW- 348 01/24/14 < 152 MWW- 797 02/26/14 194 +/- 81 < 10 < 30 < 10 < 10 < 30 <15 <10 <10 <15 < 22 MWW- 1134 03/21/14 221 +/- 84 MWW- 1662 04/22/14 257 +/- 85 MWW- 2537 05/27/14 222 +/- 84 <10 < 30 < 10 <10 < 30 <15 <10 < 10 <15 < 24 MWW- 2905 06/18/14 231 +/- 85 MWW- 3909 07/29/14 197 +/- 73 MWW- 4552 08/28/14 < 177 < 10 < 30 < 10 < 10 < 30 <15 <10 <10 <15 < 17 MWW- 4965 09/18/14 < 151 MWW- 5946 10/21/14 213 +/- 89 MWW- 6769 11/21/14 213 +/- 96 < 10 < 30 <10 < 10 < 30 <15 <10 < 10 <15 < 34 MWW- 7177 12/24/14 < 175 Monitoring Well #14 (M-52}

MWW- 349 01/19/14 < 152 MWW- 798 02/19/14 < 142 < 10 < 30 <10 <10 < 30 <15 < 10 < 10 . <15 < 21 MWW- 1135 03/17/14 < 146 MWW- 1663 04/21/14 < 146 MWW- 2538 05/23/14 < 145 < 10 < 30 < 10 <10 < 30 <15 < 10 < 10 <15 < 14 MWW- 3910 07/29/14 < 131 MWW- 4553 08/19/14 < 178 <10 < 30 <10 < 10 < 30 <15 < 10 < 10 <15 < 13 MWW- 4966 09/18/14 < 151 MWW- 5947 10/20/14 < 148 MWW- 7178 12/15/14 < 183 <10 < 30 < 10 <10 < 30 <15 <10 <10 <15 < 19 E-11

Table E-4. Ground water, analyses for tritium and gamma-emitting isotopes (continued).

Collection Concentration (pCi/L)

Lab Code Date 3H 54 Mn sgFe ssco so co sszn 9szrNb 134Cs 137Cs 14oBala 144Ce Monitoring Well #15A (M-53)

MWW- 350 01/24/14 < 152 MWW- 799 02/20/14 < 142 < 10 < 30 < 10 <10 < 30 <15 <10 <10 < 15 < 22 MWW- 1136 03/21/14 < 146 MWW- 1664 04/22/14 < 146 MWW- 2539 05/27/14 < 145 < 10 < 30 < 10 <10 < 30 <15 <10 <10 < 15 < 26 MWW- 2906 06/18/14 < 148 MWW- 3912 07/29/14 < 131 MWW- 4554 08/27/14 < 153 < 10 < 30 < 10 <10 _< 30 .<15 < 10 <10 < 15 <18 MWW-4967 09/18/14 < 151 MWW- 5949 10/20/14 < 148 MWW- 6755 11/20/14 < 170 < 10 < 30 < 10 <10 < 30 <15 .< 10 <10 < 15 < 26 MWW- 7179 12/24/14 < 175 Monitoring Well #158 (M-54)

MWW- 351 01/24/14 180 +/- 89 MWW- 800 02/20/14 170 +/- 80 < 10 < 30 < 10 <10 < 30 <15 < 10 <10 < 15 < 30 MWW- 1138 03/21/14 199 +/- 83 MWW- 1665' 04/22/14 301 +/- 88 MWW- 2540 05/27/14 210 +/- 83 <10 < 30 < 10 <10 < 30 <15 < 10 <10 < 15 < 29 MWW- 2907 06/18/14 190 +/- 83 MWW- 3913 07/29/14 188 +/- 73 MWW- 4555 08/27/14 192 +/- 91 < 10 < 30 < 10 <10 < 30 <15 < 10 <10 < 15 < 29 MWW- 4968 09/18/14 226 +/- 91 MWW- 5950 10/20/14 150 +/- 86 MWW- 6756 11/20/14 183 +/- 94 <10 < 30 < 10 <10 < 30 <15 <10 <10 < 15 < 19 MWW- 7180 12/24/14 259 +/- 108 Storm Water Run-off (SD-006)

MXW- 801 02/19/14 604 +/- 99 < 10 < 30 < 10 <10 < 30 < 15 < 10 <10 < 15 < 10 MXW- 2121 04/18/14 205 +/- 82 < 10 < 30 < 10 <10 < 30 < 15 <10 <10 < 15 < 11 MXW- 3533 07/11/14 < 138 < 10 < 30 < 10 <10 < 30 < 15 <10 <10 < 15 <16 MXW- 6480 11/14/14 < 185 < 10 < 30 < 10 <10 < 30 < 15 <10 <10 < 15 <9 Sewer Lift Station MXW- 2547 06/04/14 < 140 < 10 < 30 < 10 <10 < 30 < 15 <10 <10 < 15 < 39 MW- 7181 12/01/14 < 176 < 10 < 30 < 10 <10 < 30 < 15 <10 <10 < 15 < 17 E-12

~*' ATf E!]vironmental, Inc.

7+~ .f"\1 M1dwest Laboratory TOO Landwehr Road

Northbrook, /L 60062-2310 phone (847) 564-0700

f*x (847) 564-4517 FINAL REPORT TO XCEL ENERGY CORPORATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)

MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 LICENSE NO. DPR-22 COMPLETE ANALYSES DATA TABLES January- December, 2014 Prepared under contract by ENVIRONMENTAL, INC.

MIDWEST LABORATORY PROJECT NO. 8010 Reviewed and Approved

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

1.0 INTRODUCTION

............................................................................................................. iv 2.0 LISTING OF MISSED SAMPLES .................................................................................. . v 3.0 DATA TABLES ............................................................................................................... . vi ii

MNGP LIST OF TABLES 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 Algae or aquatic insects, analysis for gamma-emitting isotopes .............................................. :... 15-1 16 Edible cultivated (irrigated) crops, analysis for iodine-131 and gamma-emitting isotopes.......................................................................................................................... 16-1 17 Shoreline sediments, analysis for gamma-emitting isotopes ...... .......... ....... ......... .... ................... 17-1 iii

MNGP

1.0 INTRODUCTION

The following constitutes the final 2014 report for the Environmental Radiological Monitoring Program conducted at the Monticello Nuclear Generating Plant in Monticello, Minnesota.

Results of completed analyses are presented in the attached tables.

All concentrations, except gross beta, are decay corrected to the time of collection.

All samples were collected within the scheduled period unless noted otherwise in the Listing of Missed Samples.

iv

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

Collection Reason for not Sample Analysis Location Date or conducting REMP Plans for Preventing Type Period as required Recurrence sw Gamma M-008 January '14 Water frozen entire month; no composite.

ww Gamma, H-3 M-027 1/15/2014 No water available from outside tap.

sw Gamma M-008 February '14 Water frozen entire month;

'~

no composite.

sw Gamma M-009 February '14 Water frozen entire month; no composite.

TLD Gamma M-1-08 1stQtr'14 TLD missing in field.

sw Gamma M-008 March '14 Water frozen entire month; no composite.

sw H-3 M-008 March '14 Water frozen entire quarter; no composite.

APIA I Beta, 1-131 M-001 5/14/2014 Sampler found off; GFCI Breaker reset.

tripped.

AP Beta M-005 5/28/2014 Filter paper shifted in holder.

AP/AI Beta, 1-131 M-001 8/27/2014 Sampler found off; GFCI Breaker reset.

tripped.

sw Gamma M-008 December '14 Water frozen entire month; no composite.

TLD Gamma M-2C 4th Qtr '14 TLD missing in field.

v

MNGP 3.0 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 8.6 +/- 1.3 14.6 +/- 1.4 17.0+/-1.3 14.6+/-1.1 13.7 14.4 M-02A 14.7 +/- 1.9 13.7 +/- 0.8 14.0 +/- 1.0 14.6 +/- 0.8 14.2 15.7 M-03A 12.6 +/- 1.6 13.1 +/-1.4 15.3 +/- 1.4 12.8 +/- 1.2 13.4 14.6 M-04A 8.6 +/- 1.5 15.9+/-1.3 11.3 +/- 1.0 18.0 +/- 1.3 13.5 14.8 M-05A 12.1 +/- 0.9 11.6 +/- 0.8 14.5 +/- 0.6 12.2 +/- 0.8 12.6 12.9 M-06A 11.9 +/- 1.4 13.9 +/- 0.9 . 16.2 +/- 0.9 14.2 +/- 0.9 14.0 14.5 M-07A 8.0 +/- 0.9 13.4 +/-0.7 11.8 +/- 0.8 13.2 +/- 1.0 11.6 13.9 M-08A 10.2 +/- 1.2 14.2 +/- 0.8 14.4 +/- 0.7 14.8 +/- 0.9 13.4 14.6 M-09A 11.3 +/- 0.9 11.8 +/- 1.0 14.3 +/- 0.7 12.1 +/- 1.1 12.4 13.8 M-10A 11.6 +/- 0.9 12.5+/-1.1 14.5 +/- 0.7 14.7 +/- 0.9 13.4 14.6 M-11A 12.8 +/- 0.9 14.4 +/- 1.0 16.9+/-1.1 13.8 +/- 1.3 14.5 13.6 M-12A 12.1 +/-1.0 12.9 +/- 0.8 16.0 +/- 0.8 14.6 +/- 0.8 13.9 13.2 M-13A 11.2 +/- 1.2 17.0+/-1.6 13.0 +/- 0.9 16.8 +/- 1.1 14.5 16.1 M-14A 13.0 +/- 1.0 12.7 +/- 0.8 15.6 +/- 0.8 13.4 +/- 0.9 13.7 15.1 Mean+/- s.d. 11.3+/-1.9 13.7+/-1.5 14.6+/-1.7 14.3+/-1.6 13.5 14.4 Indicators (Outer Ring, 4-5 Miles Distant)

M-01B 10.2+/-1.1 12.4 +/- 1.2 13.1 +/- 0.9 13.2 +/- 1.2 12.2 14.3 M-028 10.5+/-1.0 14.2 +/- 1.0 13.3 +/- 0.7 13.1 +/- 0.8 12.8 15,0 M-038 10.9+/-1.3 10.6 +/-.0.9 11.9+/-0.7 11.2 +/- 1.0 11.1 12.1 M-048 10.9 +/- 0.9 11.4 +/- 0.8 13.4 +/- 0.6 11.9 +/- 0.8 11.9 13.6 M-05B 11.0 +/- 0.9 12.8 +/- 0.9 13.2+/-0.7 12.5+/-1.1 12.4 14.0 M-068 10.2+/-1.1 13.9+/-1.0 14.2 +/- 0.9 15.1 +/- 1.1 13.3 14.7 M-07B 14.7+/-1.1 12.0 +/- 1.1 15.3 +/- 0.8 12.6 +/- 1.2 13.7 13.1 M-088 12.1 +/- 0.8 15.7+/-1.4 13.5 +/- 1.6 15.6 +/- 1.0 14.2 15.3 M-09B 10.3 +/- 0.8 14.0 +/- 1.0 13.8 +/- 0.6 14.0 +/- 1.0 13.0 14.5 M-10B 12.6 +/- 1.4 12.7+/-1.5 16.0 +/- 1.0 13.0+/-1.1 13.6 15.8 M-11 B 11.5 +/- 1.1 13.3 +/- 1.3 15.4 +/- 0.9 13.4 +/- 1.0 13.4 14.5 M-128 12.2 +/- 1.3 14.8 +/- 1.0 15.3 +/- 0.9 14.5 +/- 0.9 14.2 14.4 M-138 10.6 +/- 1.2 11.7 +/- 1.0 12.5 +/- 0.8 12.2 +/- 1.0 11.8 13.2 M-148 11.4+/-1.1 13.2 +/- 0.9 15.8 +/- 0.9 17.1 +/- 0.9 14.4 13.8 M-158 10.8 +/- 1.0 12.4 +/- 0.9 13.5 +/- 0.8 11.9 +/- 1.1 12.1 13.4 M-168 10.2 +/- 0.9 12.5 +/- 0.9 14.6 +/- 0.6 11.7 +/- 1.1 12.2 13.1 Mean+/- s.d. 11.3+/-1.2 13.0 +/- 1.3 14.1 +/- 1.2 13.3+/-1.6 12.9 14.0 1-1

MNGP

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

(cont'inued).

Previous mRem/91 days Cumulative Annual

Location 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average Control M-01C 10.5+/-1.5 17.5+/-1.5 12.9 +/- 1.0 16.8 +/- 1.3 14.4 16.4 M-02C 11.3 +/- 1.0 13.6+/-1.1 17.3 +/- 0.9 NDa 14.1 14.0 M-03C 11.1+/-0.9 16.6 +/- 1.0 15.0 +/- 0.6 14.6 +/- 0.8 14.3 16.4 M-04C 12.0 +/- 0.8 15.1+/-1.2 15.5 +/- 1.4 14.0 +/- 0.9 14.2 15.1 Mean+/- s.d. 11.2 +/- 0.6 15.7 +/- 1.7 15.?+/-1.8 15.1 +/- 1.4 14.3 15.5 Indicators (Special Interest Areas)

M-01S 9.4+/-1.1 9.3 +/- 0.8 10.5 +/- 0.9 12.0 +/- 0.9 10.3 11.6 M-028 13.0+/-1.0 10.2 +/- 1.3 10.5 +/-0.7 13.2 +/- 0.9 11.7 13.5 M-038 11.9 +/- 1.2 14.0 +/- 1.0 13.7 +/- 0.7 12.5 +/- 1.0 13.0 14.7 M-04S 12.0 +/- 1.0 15.2 +/- 0.9 17.4+/-1.1 13.9 +/- 0.9 14.6 13.4 M-OSS 13.3 +/- 0.9 12.8 +/- 1.5 15.4+/-0.6 14.9 +/-1.1 14.1 13.8 M-068 14.5 +/- 0.9 17.5 +/- 0.9 15.3 +/- 0.8 15.3 +/- 1.0 15.6 17.1 Mean+/- s.d. 12.3 +/- 1.7 13.2 +/- 3.1 13.8 +/- 2.8 13.6 +/- 1.3 13.2 14.0 Special TLDs M-1-01 46.5 +/- 1.2 34.7 +/- 1.7 35.7 +/- 1.8 27.5 +/- 1.6 36.1 64.1 M-1-02 30.3 +/- 1.6 31.3 +/- 1.0 33.1 +/-1.0 24.3 +/- 0.8 29.8 43.1 M-1-03 23.8 +/- 1.4 28.3 +/- 1.4 28.0 +/- 1.5 22.4 +/- 1.0 25.6 36.3 M-1-04 31.4+/-1.1 40.2 +/- 2.3 34.4 +/- 2.9 36.3 +/- 2.6 35.6 31.0 M-1-05 59.0 +/- 1.9 66.5 +/- 2.8 72.7 +/- 1.5 65.3 +/- 1.9 65.9 68.0 M-1-06 25.3 +/- 1.8 25.0 +/- 1.1 27.5 +/- 2.3 22.1 +/- 0.8 25.0 24.9 M-1-07 21.6+/-1.0 31.7+/-1.7 28.7 +/- 2.1 28.9 +/- 1.4 27.7 30.5 M-1-08 NDa 26.1 +/- 0.7 28.4 +/- 2.0 25.1+/-1.9 26.6 28.6 M-1-09 58.3 +/- 2.5 174.8 +/- 7.1 220.1 +/- 10.0 229.0 +/- 9.9 170.5 113.9 M-1-10 30.1 +/- 1.0 33.2 +/- 1.7 40.9 +/- 0.6 28.6 +/-1.3 33.2 34.3 M-1-11 10.4+/-1.4 17.2 +/- 1.6 12.8 +/- 1.2 15.2 +/- 1.1 13.9 14.3 M-1-12 13.0 +/- 0.8 14.7 +/- 0.9 14.7 +/- 0.6 13.1 +/- 1.1 13.9 15.7 M-1-13 13.6 +/- 2.2 13.0+/-1.1 15.3 +/- 1.4 12.2 +/- 1.2 13.5 15.8 Mean+/- s.d. 30.3 +/- 16.5 41.3 +/- 42.3. 45.6 +/- 54.6 42.3 +/- 57.7 39.8 40.0 a"ND" = No data, see Table 2.0, List 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) 3 Units: pCi/m Collection: Continuous, weekl'y exchange.

Date Volume Date Volume Collected (m") Gross Beta Collected (m") Gross Beta Required LLD 0.010 Required LLD 0.010 01-08-14 253 0.053 +/- 0.005 07-09-14 344 0.020 +/- 0.003 01-15-14 288 0.044 +/- 0.004 07-16-14 343 0.019 +/- 0.003 01-22-14 322 0.029 +/- 0.003 07-22-14 292 0.033 +/- 0.004 01-29-14 352 0.019 +/- 0.003 07-30-14 394 0.018 +/- 0.003 02-06-14 407 0.024 +/- 0.003 08-06-14 339 0.029 +/- 0.003 02-12-14 303 0.026 +/- 0.004 08-12-14 294 0.026 +/- 0.004 02-19-14 355 0.042 +/- 0.004 08-20-14 390 0.028 +/- 0.003 02-26-14 354 0.042 +/- 0.004 08-27-14 NDb 09-03-14 343 0.019 +/- 0.003 03-04-14 271 0.040 +/- 0.004 03-12-14 401 0.028 +/- 0.003 09-10-14 313 0.025 +/- 0.003 03-18-14 307 0.022 +/- 0.003 09-17-14 311 0.025 +/- 0.003 03-26-14 404 0.027 +/- 0.003 09-24-14 311 0.042 +/- 0.004 04-02-14 319 0.028 +/- 0.003 10-01-14 311 0.039 +/- 0.004 1st Quarter Mean+/- s.d. 0.033 +/- 0.010 3rd Quarter Mean +/- s.d. 0.027 +/- 0.008 04-09-14 319 0.024 +/- 0.003 10-08-14 311 0.016 +/- 0.003 04-16-14 354 0.022 +/- 0.003 10-15-14 311 0.025 +/- 0.003 04-23-14 318 0.025 +/- 0.003 10-22-14 312 0.024 +/- 0.003 04-30-14 354 0.011 +/- 0.003 10-29-14 309 0.019 +/- 0.003 05-06-14 394 0.005 +/- 0.002 11-05-14 325 0.023 +/- 0.003 05-14-14 NDb 11-12-14 318 0.014 +/- 0.003 05-21-14 373 0.022 +/- 0.003 11-19-14 321 0.026 +/- 0.003 05-28-14 376 0.018 +/- 0.003 11-26-14 315 0.040 +/- 0.004 12-03-14 325 0.049 +/- 0.004 06-05-14 435 0.017 +/- 0.003 06-11-14 320 0.023 +/- 0.003 12-10-14 351 0.056 +/- 0.004 06-18-14 381 0.019 +/- 0.003 12-17-14 323 0.055 +/- 0.004 06-25-14 337 0.020 +/- 0.003 12-23-14 268 0.041 +/- 0.004 07-02-14 343 0.015 +/- 0.003 12-31-14 369 0.031 +/- 0.003 2nd Quarter Mean +/- s.d. 0.018 +/- 0.006 4th Quarter Mean +/- s.d. 0.032 +/- 0.014 Cumulative Average 0.028 Previous Annual Average 0.032 3

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

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

2-1

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

Location: M-2 3

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

Date Volume Date Volume Collected (m~) Gross Beta Collected (m") Gross Beta Reguired LLD 0.010 0.010 01-08-14 273 0.047 +/- 0.005 07-09-14 354 0.021 +/- 0.003 01-15-14 327 0.036 +/- 0.004 07-16-14 353 0.018 +/- 0.003 01-22-14 354 0.024 +/- 0.003 07-22-14 300 0.032 +/- 0.004 01-29-14 313 0.025 +/- 0.003 07-30-14 407 0.019 +/- 0.003 02-06-14 392 0.023 +/- 0.003 08-06-14 348 0.030 +/- 0.003 02-12-14 292 0.030 +/- 0.004 08-12-14 303 0.027 +/- 0.004 02-19-14 316 0.044 +/- 0.004 08-20-14 405 0.027 +/- 0.003 02-26-14 288 0.033 +/- 0.004 08-27-14 349 0.019 +/- 0.003 09-03-14 354 0.020 +/- 0.003 03-04-14 246 0.044 +/- 0.005 03-12-14 359 0.033 +/- 0.004 09-10-14 329 0.021 +/- 0.003 03-18-14 249 0.023 +/- 0.004 09-17-14 351 0.014 +/- 0.003 03-26-14 361 0.026 +/- 0.003 09-24-14 352 0.031 +/- 0.003 04-02-14 289 0.023 +/- 0.004 10-01-14 352 0.032 +/- 0.003 1st Quarter Mean +/- s.d. 0.032 +/- 0.009 3rd Quarter Mean +/- s.d. 0.024 +/- 0.006 04-09-14 289 0.028 +/- 0.004 10-08-14 326 0.015 +/- 0.003 04-16-14 263 0.027 +/- 0.004 10-15-14 354 0.018 +/- 0.003 04-23-14 262 0.027 +/- 0.004 10-22-14 352 0.017 +/- 0.003 04-30-14 263 0.015 +/- 0.004 10-29-14 324 0.020 +/- 0.003 05-06-14 251 0.009 +/- 0.003 11-05-14 357 0.020 +/- 0.003 05-14-14 429 0.013 +/- 0.002 11-12-14 352 0.019 +/- 0.003 05-21-14 353 0.023 +/- 0.003 11-19-14 352 0.028 +/- 0.003 05-28-14 351 0.019 +/- 0.003 11-26-14 348 0.036 +/- 0.003 12-03-14 358 0.040 +/- 0.004 06-05-14 405 0.019 +/- 0.003 06-11-14 302 0.016 +/- 0.003 12-10-14 351 0.053 +/- 0.004 06-18-14 355 0.020 +/- 0.003 12-17-14 358 0.047 +/- 0.004 06-25-14 379 0.015 +/- 0.002 12-23-14 294 0.034 +/- 0.004 07-02-14 353 0.015 +/-0.003 12-31-14 376 0.034 +/- 0.003 2nd Quarter Mean+/- s.d. 0.019 +/- 0.006 4th Quarter Mean +/- s.d. 0.029 +/- 0.012 Cumulative Average 0.026 Previous Annual Average 0.028 3

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

3-1

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

Location: M-3 3

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

Date Volume Date Volume Collected (m;j) Gross Beta Collected (m;;) Gross Beta Required LLD 0.010 0.010 01-08-14 304 0.043 +/- 0.004 07-09-14 345 0.020 +/- 0.003 01-15-14 325 0.033 +/- 0.004 07-16-14 345 0.022 +/- 0.003 01-22-14 359 0.028 +/- 0.003 07-22-14 293 0.038 +/- 0.004 01-29-14 350 0.022 +/- 0.003 07-30-14 438 0.018 +/- 0.002 02-06-14 472 0.023 +/- 0.003 08-06-14 348 0.031 +/- 0.003 02-12-14 270 0.032 +/- 0.004 08-12-14 303 0.027 +/- 0.004 02-19-14 299 0.045 +/- 0.004 08-20-14 405 0.029 +/- 0.003 b

02-26-14 271 0.053 +/- 0.005 08-27-14 350 0.009 +/- 0.002 09-03-14 354 0.020 +/- 0,003 03-04-14 254 0.043 +/- 0.005 03-12-14 370 0.037 +/- 0.004 09-10-14 329 0.024 +/- 0.003 03-18-14 276 0.022 +/- 0.004 09-17-14 350 0.016 +/- 0.003 03-26-14 376 0.031 +/- 0.003 09-24-14 352 0.031 +/- 0.003 04-02-14 299 0.029 +/- 0.004 10-01-14 353 0.032 +/- 0.003 1st Quarter Mean+/- s.d. 0.034 +/- 0.010 3rd Quarter Mean +/- s.d. 0.024 +/- 0.008 04-09-14 325 0.027 +/- 0.003 10-08-14 326 0.016 +/- 0.003 04-16-14 296 0.021 +/- 0.003 10-15"14 354 0.021 +/- 0.003 04-23-14 299 0.027 +/- 0.004 10-22-14 352 0.021 +/- 0.003 04-30-14 325 0.012 +/- 0.003 10-29-14 325 0.021 +/- 0.003 05-06-14 283 0.011 +/- 0.003 11-05-14 354 0.022 +/- 0.003 05-14-14 388 0.014 +/- 0.003 11-12-14 355 0.018 +/- 0.003 05-21-14 344 0.023 +/- 0.003 11-19-14 353 0.030 +/- 0.003 05-28-14 342 0.020 +/- 0.003 11-26-14 375 0.034 +/- 0.003 12-03-14 358 0.040 +/- 0.004 06-05-14 395 0.021 +/- 0.003 06-11-14 294 0.021 +/- 0.004 12-10-14 351 0.061 +/- 0.004 06-18-14 371 0.018 +/- 0.003 12-17-14 358 0.047 +/- 0.004 06-25-14 368 0.017 +/- 0.003 12-23-14 294 0.036 +/- 0.004 07-02-14 344 0.016 +/- 0.003 12-31-14 376 0.036 +/- 0.003 2nd Quarter Mean +/- s.d. 0.019 +/- 0.005 4th Quarter Mean +/- s.d. 0.031 +/- 0.013 Cumulative Average 0.027 Previous Annual Average 0.027 a lodine-131 concentrations are< 0.03 pCi/m 3 unless otherwise noted.

b Filter light.

4-1

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

Location: M-4 3

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

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Required LLD 0.010 0.010 01-08-14 279 0.045 +/- 0.004 07-09-14 353 0.021 +/- 0.003 01-15-14 325 0.035 +/- 0.004 07-16-14 352 0.019 +/- 0.003 01-22-14 353 0.027 +/- 0.003 07-22-14 300 0.031 +/- 0.004 01-29-1-4 325 0.024 +/- 0.003 07-30-14 407 0.006 +/- 0.002 02-06-14 421 0.024 +/- 0.003 08~06-14 348 0.032 +/- 0.004 02-12-14 316 0.030 +/- 0.004 08-12-14 303 0.024 +/- 0.004 02-19-14 369 0.041 +/- 0.004 08-20-14 406 0.030 +/- 0.003 02-26-14 328 0.051 +/- 0.004 08-27-14 350 0.018 +/- 0.003 09-03-14 354 0.021 +/- 0.003 03-04-14 291 0.040 +/- 0.004 03-12-14 388 0.040 +/- 0.004 09-10-14 }28 0.026 +/- 0.003 03-18-14 295 0.026 +/- 0.004 09-17-14 351 0.017 +/- 0.003 03-26-14 417 0.029 +/- 0.003 09-24-14 352 0.033 +/- 0.003 04-02-14 368 0.027 +/- 0.003 10-01-14 352 0.032 +/- 0.003 1st Quarter Mean+/- s.d. 0.034 +/- 0.009 3rd Quarter Mean +/- s.d. 0.024 +/- 0.008 04-09-14 341 0.026 +/- 0.003 10-08-14 326 0.015 +/- 0.003 04-16-14 369 0.022 +/- 0.003 10-15-14 353 0.019 +/- 0.003 04-23-14 341 0.028 +/- 0.003 10-22-14 355 0.019 +/- 0.003 04-30-14 342 0.010 +/- 0.003 10-29-14 324 0.018 +/- 0.003 05-06-14 318 0.011 +/- 0.003 11-05-14 355 0.021 +/- 0.003 05-14-14 398 0.012 +/- 0.002 11-12-14 354 0.018 +/- 0.003 05-21-14 352 0.021 +/- 0.003 11-19-14 354 0.028 +/- 0.003 05-28-14 351 0.018 +/- 0.003 11-26-14 347 0.034 +/- 0.003 12-03-14 358 0.038 +/- 0.004 06-05-14 374 0.020 +/- 0.003 06-11-14 300 0.018 +/- 0.003 12-10-14 351 0.053 +/- 0.004 06-18-14 359 0.016 +/- 0.003 12-17-14 385 0.043 +/- 0.004 06-25-14 346 0.014 +/- 0.003 12-23-14 294 0.032 +/- 0.004 07-02-14 352 0.014 +/- 0.003 12-31-14 375 0.030 +/- 0.003 2nd Quarter Mean +/- s.d. 0.018 +/- 0.006 4th Quarter Mean +/- s.d. 0.029 +/- 0.012 Cumulative Average 0.026 Previous Annual Average 0.028 3

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

5-1

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

Location: M-5 3

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

Date Volume Date Volume Collected (m") Gross Beta Collected (m") Gross Beta Required LLD 0.010 0.010 01-08-14 279 0.047 +/- 0.005 07-09-14 389 0.021 +/- 0.003 01-15-14 296 0.039 +/- 0.004 07-16-14 358 0.024 +/- 0.003 01-22-14 324 0.033 +/- 0.004 07-22-14 310 0.035 +/- 0.004 01-29-14 292 0.023 +/- 0.004 07-30-14 407 0.020 +/- 0.003 02-06-14 371 0.028 +/- 0.003 08-06-14 348 0.029 +/- 0.003 02-12-14 303 0.029 +/- 0.004 08-12-14 303 0.022 +/- 0.003 02-19-14 295 0.054 +/- 0.005 08-20-14 402 0.026 +/- 0.003 02-26-14 294 0.052 +/- 0.005 08-27-14 354 0.018 +/- 0.003 09-03-14 354 0.022 +/- 0.003 03-04-14 275 0.044 +/- 0.004 03-12-14 334 0.038 +/- 0.004 09-10-14 298 0.025 +/- 0.004 03-18-14 254 0.030 +/- 0.004 09-17-14 321 0.016 +/- 0.004 03-26-14 336 0.031 +/- 0.003 09-24-14 323 0.034 +/- 0.004 04-02-14 324 0.028 +/- 0.003 10-01-14 294 0.037 +/- 0.004 1st Quarter Mean+/- s.d. 0.036 +/- 0.010 3rd Quarter Mean +/- s.d. 0.025 +/- 0.007 04-09-14 294 0.028 +/- 0.004 10-08-14 294 0.016 +/- 0.003 04-16-14 295 0.025 +/- 0.004 10-15-14 296 0.026 +/- 0.003 04-23-14 294 0.024 +/- 0.003 10-22-14 295 0.023 +/- 0.003 04-30-14 294 0.015 +/- 0.003 10-29-14 292 0.022 +/- 0.003 05-06-14 253 0.011 +/- 0.003 11-05-14 329 0.019 +/- 0.003 05-14-14 441 0.014 +/- 0.002 11-12-14 322 0.016 +/- 0.003 05-21-14 388 0.021 +/- 0.003 11-19-14 296 0.033 +/- 0.004 05-28-14 NOb 11-26-14 318 0.038 +/- 0.004 12-03-14 328 0.048 +/- 0.003 06-05-14 412 0.019 +/- 0.003 06-11-14 332 0.020 +/- 0.003 12-10-14 352 0.059 +/- 0.004 06-18-14 396 0.022 +/- 0.003 12-17-14 328 0.055 +/- 0.004 06-25-14 382 . 0.018 +/- 0.003 12-23-14 294 0.037 +/- 0.004 07-02-14 388 0.017 +/- 0.003 12-31-14 339 0.038 +/- 0.004 2nd Quarter Mean +/- s.d. 0.019 +/- 0.005 4th Quarter Mean +/- s.d. 0.033 +/- 0.014 Cumulative Average 0.029 Previous Annual Average 0.031 3

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

b "NO"= 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 0.036 0.019 0.053 Control 0.020 0.011 0.025 M-1 0.036 0.019 0.053 M-1 0.020 0.011 0.025 Indicators 0.033 0.022 0.047 Indicators 0.023 0.010 0.028 M-2 0.033 0.024 0.047 M-2 0.024 0.015 0.028 M-3 0.031 0.022 0.043 M-3 0.022 0.012 0.027 M-4 0.033 0.024 0.045 M-4 0.022 0.010 0.028 M-5 0.035 0.023 0.047 M-5 0.023 0.015 0.028 February May Location Average Minima Maxima Location Average Minima Maxima Control 0.034 0.024 0.042 Control 0.015 0.005 0.022 M-1 0.034 0.024 0.042 M-1 0.015 0.005 0.022 Indicators 0.037 0.023 0.054 Indicators 0.016 0.009 0.023 M-2 0.033 0.023 0.044 M-2 0.016 0.009 0.023 M-3 0.038 0.023 0.053 M-3 0.017 0.011 0.023 M-4 0.036 0.024 0.051 M-4 0.015 0.011 0.021 M-5 0.041 0.028 0.054 M-5 0.015 0.011 0.021 March June Location Average Minima Maxima Location Average Minima Maxima Control 0.029 0.022 0.040 Control 0.019 0.015 0.023 M-1 0.029 0.022 0.040 M-1 0.019 0.015 0.023 Indicators 0.032 0.022 0.044 Indicators 0.018 0.014 0.022 M-2 0.030 0.023 0.044 M-2 0.017 0.015 0.020 M-3 0.032 0.022 0.043 M-3 0.019 0.016 0.021 M-4 0.032 0.026 0.040 M-4 0.016 0.014 0.020 M-5 0.034 0.028 0.044 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 0.022 0.018 0.033 Control 0.021 0.016 0.025 M-1 0.022 0.018 0.033 M-1 0.021 0.016 0.025 Indicators 0.023 0.006 0.038 Indicators 0.019 0.015 0.026 M-2 0.023 0.018 0.032 M-2 0.018 0.015 0.020 M-3 0.025 0.018 0.038 M-3 0.020 0.016 0.021 M-4 0.019 0.006 0.031 M-4 0.018 0.015 0.019 M-5 0.025 0.020 0.033 M-5 0.022 0.016 0.026 August November Location Average Minima Maxima Location Average Minima Maxima Control Control 0.030 0.014 0.049 M-1 0.024 0.019 0.028 M-1 0.030 0.014 0.049 Indicators 0.022 0.009 0.030 Indicators 0.029 0.016 0.048 M-2 0.023 0.019 0.027 M-2 0.029 0.019 0.040 M-3 0.021 0.009 0.029 M-3 0.029 0.018 0.040 M-4 0.023 0.018 0.030 M-4 0.028 0.018 0.038 M-5 0.022 0.018 0.026 M-5 0.031 0.016 0.048 September December Location Average Minima Maxima Location Average Minima Maxima Control Control 0.046 0.031 0.056 M-1 0.033 0.025 0.042 M-1 0.046 0.031 0.056 Indicators 0.026 0.014 0.037 Indicators 0.043 0.030 0.061 M-2 0.025 0.014 0.0~2 M-2 0.041 0.034 0.053 M-3 0.026 0.016 0.032 M-3 0.045 0.036 0.061 M-4 0.027 0.017 0.033 M-4 0.040 0.030 0.053 M-5 0.028 0.016 0.037 M-5 0.047 0.037 0.059 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/m 3)

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

Lab Code MAP- 1686 MAP- 3703 MAP- 5978 MAP- 7455 3

Volume(m ) 4335 4381 4061 4159

\

Be-7 0.073 +/- 0.014 0.073 +/- 0.011 0.082 +/- 0.017 0.045 +/- 0.012 0.068 0.067 Mn-54 < 0.0008 < 0.0005 < 0.0008 < 0.0006 <0.0008 <0.0009 Co-58 < 0.0010 < 0.0005 < 0.0006 < 0.0008 <0.0010 <0.0006 Co-60 < 0.0006 < 0.0006 < 0.0004 < 0.0007 <0.0006 <0.0007 Zn-65 < 0.0011 < 0.0005 < 0.0007 < 0.0009 <0.0011 <0.0015 Zr-Nb-95 < 0.0009 < 0.0008 < 0.0015 < 0.0007 <0.0015 <0.0012 Ru-1 03 < 0.0007 < 0.0008 < 0.0006 < 0.0006 <0.0008 <0.0007 Ru-106 < 0.0063 < 0.0048 < 0.0041 < 0.0073 <0.0063 <0.0091 Cs-134 < 0.0011 < 0.0006 < 0.0008 < 0.0009 <0.0011 <0.0008 Cs-137 < 0.0006 < 0.0005 < 0.0007 < 0.0009 <0.0007 <0.0010 Ba-La-140 < 0.0016 < 0.0019 < 0.0021 < 0.0034 <0.0021 <0.0022 Ce-141 < 0.0014 < 0.0009 < 0.0016 < 0.0018 <0.0016 <0.0016 Ce-144 < 0.0042 < 0.0031 < 0.0046 < 0.0050 <0.0046 <0.0050 M-2 Lab Code MAP- 1687 MAP- 3704 MAP- 5979 MAP- 7456 3

Volume(m ) 4059 4254 4557 4503 Be-7 0.058 +/- 0.013 0.078 +/- 0.016 0.076 +/- 0.013 0.045 +/- 0.010 0.064 0.062 Mn-54 < 0.0004 < 0.0008 < 0.0003 < 0.0004 <0.0008 <0.0008 Co-58 < 0.0004 < 0.0010 < 0.0006 < 0.0005 <0.0010 <0.0007 Co-60 < 0.0006 < 0.0008 < 0.0005 < 0.0003 <0.0008 <0.0008 Zn-65 < 0.0015 < 0.0009 < 0,0010 < 0.0011 <0.0015 <0.0009 Zr-Nb-95 < 0.0010 < 0.0010 < 0.0010 < 0.0007 <0.0010 <0.0011 Ru-1 03 < 0.0008 < 0.0014 < 0.0010 < 0.0005 <0.0014 <0.0008 Ru-106 < 0.0053 < 0.0071 < 0.0077 < 0.0053 <0.0077 <0.0061 Cs-134 < 0.0007 < 0.0010 < 0.0008 < 0.0007 <0.0010 <0.0007 Cs-137 < 0.0006 < 0.0007 < 0.0008 < 0.0005 <0.0008 <0.0006 Ba-La-140 < 0.0011 < 0.0017 < 0.0042 < 0.0009 <0.0042 <0.0020 Ce-141 < 0.0013 < 0.0015 < 0.0014 < 0.0012 <0.0015 <0.0014 Ce-144 < 0.0033 < 0.0037 < 0.0040 < 0.0042 <0.0040 <0.0041 8-1

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 8 8 8 Lab Code NS NS NS MSW-2102 MSW-2712 Mn-54 < 10 <10 Fe-59 < 30 < 30 Co-58 < 10 <10 Co-60 < 10 <10 Zn-65 < 30 < 30 Zr-Nb-95 < 15 < 15 Cs-134 < 10 < 10 Cs-137 < 10 < 10 Ba-La-140 < 15 < 15 Ce-144 < 17 < 30 Period Collected June July August September October Lab Code MSW-3375 MSW-4305 MSW-4701 MSW-5802 MSW-6594 Mn-54 <10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 <10 < 10 < 10 < 10 < 10 Co-60 <10 <10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 <15 < 15 < 15 <15 < 15 Cs-134 <10 < 10 < 10 <10 < 10 Cs-137 <10 < 10 < 10 <10 < 10 Ba-La-140 <15 < 15 < 15 <15 < 15 Ce-144 < 22 < 23 < 28 <15 < 24 Previous Period Collected November December Cumulative Annual 8

Lab Code MSW-6806 NS Average Average Mn-54 < 10 <10 <10 Fe-59 < 30 < 30 < 30 Co-58 < 10 <10 <10 Co-60 < 10 <10 <10 Zn-65 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 Cs-134 < 10 <10 < 10 Cs-137 < 10 <10 < 10 Ba-La-140 < 15 < 15 < 15 Ce-144 < 22 < 30 < 26 a "NS" = No sample; see Table 2.0, Listing of Missed Samples.

b Composite of four samples for month; water frozen on 04-02-14.

c Composite of two samples for month; water frozen on 11-19-14 and 11-26-14.

8-2

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

Activity (pCi/m 3)

Cumulative Previous 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average M-3 Lab Code MAP- 1688 MAP- 3705 .MAP- 5980 MAP- 7457 3

Volume(m ) 4225 4372 4564 4529 Be-7 0.065 +/- 0.010 O.Q78 +/- 0.015 0.075 +/- 0.013 0.042 +/- 0.010 0.065 0.059 Mn"54 < 0.0004. < 0.0009 < 0.0008 < 0.0006 <0.0009 <0.0007 Co-58 < 0.0005 < 0.0008 < 0.0007 < 0.0006 <0.0008 <0.0006 Co-60 < 0.0004 < 0.0006 < 0.0007 < 0.0005 <0.0007 <0.0005 Zn-65 < 0.0007 < 0.0009 < 0.0005 < 0.0004 <0.0009 <0.0013 Zr-Nb-95 < 0.0006 < 0.0006 < 0.0008 < 0.0004 <0.0008 <0.0011 Ru-1 03 < 0.0008 < 0.0011 < 0.0011 < 0.0005 <0.0011 <0.0008 Ru-106 < 0.0038 < 0.0057 < 0.0068 < 0.0051 <0.0068 <0.0057 Cs-134 < 0.0005 < 0.0007 < 0.0009 < 0.0006 <0.0009 0.0013 Cs-137 < 0.0004 < 0.0006 < 0.0006 < 0.0005 <0.0006 0.0014 Ba-La-140 < 0.0016 < 0.0015 < 0.0015 < 0.0009 <0.0016 <0.0019 Ce-141 < 0.0012 < 0.0016 < 0.0018 < 0.0009 <0.0018 <0.0018 Ce-144 < 0.0027 < 0.0055 < 0.0052 < 0.0019 <0.0055. <0.0038 M-4 Lab Code MAP- 1689 MAP- 3706 MAP- 5981 MAP- 7458 3

Volume(m ) 4474 4541 4555 4530 Be-7 0.060 +/- 0.012 0.071 +/- 0.011 0.064 +/- 0.012 0.037 +/- 0.008 0.058 0.063 Mn-54 < 0.0008 < 0.0004 < 0.0005 < 0.0006 <0.0008 <0.0007 Co-58 < 0.0009 < 0.0008 < 0.0011 < 0.0005 <0.0011 <0.0005 Co-60 < 0.0004 < 0.0004 < 0.0008 < 0.0006 <0.0008 <0.0004 Zn-65 < 0.0006 < 0.0005 < 0.0009 < 0.0010 <0.0009 <0.0006 Zr-Nb-95 < 0.0005 < 0.0007 < 0.0010 < 0.0005 <0.0010 <0.0007 Ru-103 < 0.0004 < 0.0006 < 0.0009 < 0.0007 <0.0009 <0.0007 Ru-106 < 0.0039 < 0.0046 < 0.0060 < 0.0049 <0.0060 <0.0066 Cs-134 < 0.0008 < 0.0007 < 0.0007 < 0.0006 <0.0008 <0.0006 Cs-137 < 0.0003 < 0.0008 < 0.0010 < 0.0004 <0.0010 <0.0005 Ba-La-140 < 0.0017 < 0.0020 < 0.0030 < 0.0013 <0.0030 <0.0019 Ce-141 < 0.0017 < 0.0015 < 0.0012 < 0.0013 <0.0017 <0.0012 Ce-144 < 0.0035 < 0.0035 < 0.0030 < 0.0022 <0.0035 <0.0034 8-3

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

Activity (pCi/m 3 )

Cumulative Previous 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. Average Average M-5 Lab Code MAP- 1690 MAP- 3707 MAP- 5982 MAP- 7459 3

Volume(m ) 3975 4527 4460 4083 B~-7 0.072 +/- 0.014 0.078 +/- 0.012 0.081 +/- 0.015 0.057 +/- 0.012 0.072 0.072 Mn-54 < 0.0008 < 0.0005 < 0.0009 < 0.0005 <0.0009 <0.0011 Co-58 < 0.0006 < 0.0005 < 0.0005 < 0.0008 <0.0006 <0.0009 Co-60 < 0.0004 < 0.0005 < 0.0006 < 0.0005 <0.0006 <0.0007 Zn-65 < 0.0007 < 0.0006 < 0.0008 < 0.0011 <0.0008 <0.0012 Zr-Nb-95 < 0.0010 < 0.0005 < 0.0011 < 0.0006 <0.0011 <0.0010 Ru-103 < 0.0007 < 0.0010 < 0.0011 < 0.0008 <0.0011 <0.0012 Ru-106 < 0.0065 < 0.0050 < 0.0055 < 0.0043 <0.0065 <0.0056 Cs-134 < 0.0008 < 0.0007 < 0.0008 < 0.0007 <0.0008 <0.0006 Cs-137 < 0.0007 < 0.0005 < 0.0007 < 0.0009 <0.0007 <0.0006 Ba-La-140 < 0.0019 < 0.0014 < 0.0016 < 0.0012 <0.0019 <0.0018 Ce-141 < 0.0023 < 0.0013 < 0.0017 < 0.0013 <0.0023 <0.0019 Ce-144 < 0.0039 < 0.0031 < 0.0047 < 0.0029 <0.0047 <0.0048 8-4

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 07-09-14 08-12-14 09-10-14 Lab Code MVE- 3263 MVE- 4169 MVE- 4800 Mn-54 < 0.009 < 0.006 < 0.010 < 0.010 < 0.010 Fe-59 < 0.031 < 0.023 < 0.024 < 0.031 < 0.026 Co-58 < 0.008 < 0.009 < 0.007 < 0.009 < 0.011 Co-60 < 0.009 < 0.005 < 0.008 < 0.009 < 0.011 Zn-65 < 0.024 < 0.010 < 0.018 < 0.024 < 0.026 Nb-95 < 0.011 < 0.008 < 0.008 < 0.011 < 0.019 1-131 < 0.019 < 0.026 < 0.038 < 0.038 < 0.034 Cs-134 < 0.011 < 0.009 < 0.011 < 0.011 < 0.011 Cs-137 < 0.011 < 0.009 < 0.008 < 0.011 < 0.017 Location: M-42 (Biology Station Road)

Date Collected 07-09-14 08-12-14 09-10-14 Lab Code MVE- 3264 MVE- 4170 MVE- 4801 Mn-54 < 0.008 < 0.006 < 0.005 < 0.008 < 0.014 Fe-59 < 0.020 < 0.022 < 0.018 < 0.022 < 0.022 Co-58 < 0.008 < 0.006 < 0.008 < 0.008 <0.013 Co-60 < 0.008 < 0.007 < 0.006 < 0.008 < 0.014 Zn-65 < 0.024 < 0.009 < 0.009 < 0.024 < 0.031 Nb-95 < 0.012 < 0.006 < 0.007 < 0.012 < 0.017 1-131 < 0.023 < 0.024 < 0.030 < 0.030 < 0.034 Cs-134 < 0.011 < 0.009 < 0.009 < 0.011 < 0.016 Cs-137 < 0.008 < 0.010 < 0.008 < 0.010 < 0.017 Location: M-43 (lmholte Farm, Control)

Date Collected 07-09-14 08-12-14 09-10-14 Lab Code MVE- 3265 MVE- 4171 MVE- 4802 Mn-54 < 0.010 < 0.012 < 0.010 < 0.012 < 0.016 Fe-59 < 0.013 < 0.020 < 0.030 < 0.030 < 0.018 Co-58 < 0.009 < 0.009 < 0.013 < 0.013 < 0.014 Co-60 < 0.006 < 0.014 < 0.010 < 0.014 <.0.011 Zn-65 < 0.013 < 0.014 < 0.029 < 0.029 < 0.022 Nb-95 < 0.007 < 0.015 < 0.013 < 0.015 < 0.015 1-131 < 0.018 < 0.023 < 0.037 < 0.037 < 0.031 Cs-134 < 0.010 < 0.014 < 0.010 < 0.014 < 0.016 Cs-137 < 0.008 < 0.013 < 0.011 < 0.013 < 0.016 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 Lab Code NS" NS" NS" MSW-2102 MSW-2712 Mn-54 < 10 < 10 Fe-59 < 30 < 30 Co-58 < 10 < 10 Co-60 < 10 < 10 Zn-65 < 30 < 30 Zr-Nb-95 < 15 < 15 Cs-134 < 10 < 10 Cs-137 < 10 < 10 Ba-La-140 < 15 < 15 Ce-144 < 17 < 30 Period Collected June July August September October Lab Code MSW-3375 MSW-4305 MSW-4701 MSW-5802 MSW-6594 Mn-54 < 10 < 10 < 10 < 10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 < 10 < 10 < 10 Co-60 < 10 < 10 < 10 < 10 < 10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 < 15 < 15 Cs-134 < 10 < 10 <10 < 10 < 10 Cs-137 < 10 < 10 < 10 < 10 < 10 Ba-La-140 < 15 < 15 < 15 < 15 < 15 Ce-144 < 22 < 23 < 28 < 15 < 24 Previous c

Period Collected November December Cumulative Annual Lab Code MSW-6806 NS" Average Average Mn-54 <10 < 10 < 10 Fe-59 < 30 < 30 < 30 Co-58 <10 < 10 < 10 Co-60 <10 <10 < 10 Zn-65 < 30 < 30 < 30 Zr-Nb-95 < 15 < 15 < 15 Cs-134 < 10 <10 < 10 Cs-137 < 10 <10 < 10 Ba-La-140 < 15 <15 < 15 Ce-144 < 22 < 30 < 26 a "NS" = No sample; see Table 2.0, Listing of Missed Samples.

b Composite of four samples for month; water frozen on 04-02-14.

c Composite of two samples for month; water frozen on 11-19-14 and 11-26-14.

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-485 NSb MSW-1451 MSW-2103 MSW-2714 Mn-54 <10 < 10 < 10 <10 Fe-59 < 30 < 30 < 30 < 30 Co-58 < 10 < 10 <10 < 10 Co-60 <10 < 10 <10 < 10 Zn-65 < 30 < 30 < 30 < 30 Zr-Nb-95 <15 < 15 < 15 < 15 Cs-134 <10 < 10 < 10 < 10 Cs-137 <10 < 10 < 10 < 10 Ba-La-140 <15 < 15 < 15 < 15 Ce-144 <12 < 25 < 13 < 26 Period Collected June July August September October Lab Code MSW-3376 MSW-4306 MSW-4702 MSW-5803 MSW-6595 Mn-54 < 10 <10 < 10 <10 < 10 Fe-59 < 30 < 30 < 30 < 30 < 30 Co-58 < 10 <10 < 10 <10 < 10 Co-60 < 10 < 10 < 10 < 10 <10 Zn-65 < 30 < 30 < 30 < 30 < 30 Zr-Nb-95 <15 < 15 < 15 <15 < 15 Cs-134 <10 < 10 < 10 < 10 < 10 Cs-137 <10 < 10 < 10 <10 <10 Ba-La-140 <15 < 15 < 15 < 15 <15 Ce-144 <22 < 18 < 24 < 12 < 16 Previous Period Collected November December Cumulative Annual Lab Code MSW-6807 MSW-7398 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 < 33 < 26 < 33 < 29 "Composite of two samples for month; water frozen on 01-22-14 and 01-29-14.

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

c Composite of three samples for month; water frozen 03-04-14.

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-406 MDW-875 MDW-1452 MDW-2023 MDW-2598 Gross beta 2.2 +/- 1.0 3.4+/-1.9 3.4 +/- 0.8 3.6 +/- 1.8 3.5 +/- 0.7 1-131 < 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 < 20 < 19 <19 <16 < 26 Period Collected June July August September October Lab Code MDW-3288 MDW-4046 MDW-4703 MDW-5303 MDW-6360 Gross beta 2.5 +/- 1.0 < 0.9 < 1.7 2.3 +/- 0.7 3.5 +/- 1.1 1-131 < 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 <42 < 19 < 15 < 26 < 46 Period Collected November December Cumulative Previo.us Lab Code

MDW-6918 MDW-7289 Average Average Gross beta < 0.9 1.2 +/- 0.3 2.8 2.2 1-131 < 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 < 19 < 24 < 46 <51 11-1

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

Collection: Quarterly composites of weekly collections.

sa*mple Type, Location and Concentration (pCi/Ll Collection Period Lab Code H-3 River Water Upstream, M-8 (C) 8 1st Quarter ND 2nd Quarter MSW -3325 < 500 < 137 3rd Quarter MSW- 5140 < 500 < 149 4th Quarter MSW -7401 < 500 < 180 Cumulative Average < 500 < 165 Previous Annual Average < 500 < 153 River Water Downstream, M-9 1st Quarter MSW -1453 < 500 < 143 2nd Quarter MSW- 3326 < 500 < 137 3rd Quarter MSW- 5141 < 500 < 149 4th Quarter MSW -7402 < 500 < 179 Cumulative Average < 500 < 157 Previous Annual Average < 500 < 166 Drinking Water Minneapolis, M-14 1st Quarter MOW -1454 < 500 < 143 2nd Quarter MOW- 3327 < 500 < 137 3rd Quarter MOW -5809 < 500 < 151 4th Quarter MOW -7288 < 500 < 177 Cumulative Average < 500 < 157 Previous Annual Average < 500 < 160 a "ND" = No data; see Table 2.0, Listing of Missed Samples.

12-1

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

Sample Description and Concentration (pCi/L)

LO (J)

Date H-3 (J) co 0 LO .D.

LO LO 6 "? "? z dJ 0 c:

Collected Lab Code (< 500 pCi/L) u. 0 0 N ~

Monticello (M-11 l 1/15/2014 MWW-212 < 142 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 4/18/2014 MWW-1602 < 146 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 36 7/16/2014 MWW-3528 < 137 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 36 10/17/2014 MWW-5840 < 150 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 15 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 36 Plant Well No.1 (M-12) 1/15/2014 MWW-213 < 142 '< 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 20 4/18/2014 MWW-1603 < 146 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 23 7/16/2014 MWW-3529 < 137 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 22 10/15/2014 MWW-5685 < 158 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 48 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 48 Wise (M-27) 1/15/2014 NS" 4/18/2014 MWW-1604 < 146 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 27 7/16/2014 MWW-3530 < 137 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 19 10/15/2014 MWW-5686 < 158 <10 <30 <10 <10 <30 <15 <10 <10 <15 <31 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 31 lmholte (M-43) Control 1/15/2014 MWW-211 < 142 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 15 4/18/2014 MWW-1605 < 146 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 20 7/16/2014 MWW-3531 < 137 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 38 10/15/2014 MWW-5687 < 158 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 34 Cumulative Averages < 500 < 10 < 30 < 10 < 10 < 30 < 15 < 10 < 10 < 15 < 38

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

13-1

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

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

Date Collected 06-05-14 06-05-14 09-09-14 Lab Code MF- 2583 MF- 2585 MF- 4793 Sample Type Channel Catfish K-40 2.61 +/- 0.40 3.04 +/- 0.43 2.47 +/- 0.38 2.72 3.36 Mn-54 < 0.016 < 0.019 < 0.019 < 0.019 < 0.018 Fe-59 < 0.059 < 0.040 < 0.056 < 0.059 < 0.055 Co-58 < 0.015 < 0.014 < 0.020 < 0.023 < 0.023 Co-60 < 0.013 < 0.017 < 0.020 < 0.020 < 0.022 Zn-65 < 0.024 < 0.034 < 0.026 < 0.034 < 0.037 Nb-95 < 0.032 < 0.057 < 0.035 < 0.057 < 0.027 Zr-95 < 0.035 < 0.055 < 0.028 < 0.055 < 0.035 Cs-134 < 0.018 < 0.016 < 0.018 < 0.019 < 0.018 Cs-137 < 0.013 < 0.016 < 0.020 < 0.020 < 0.020 Ba-La-140 < 0.150 < 0.166 < 0.272 < 0.272 < 0.067 Ce-144 < 0.140 < 0.115 < 0.150 < 0.150 < 0.107 Date Collected 09-09-14 Lab Code MF- 4794 Sample Type Shorthead Red horse K-40 2.76.+/- 0.42 Mn-54 < 0.010 j

Fe-59 < 0.038 Co-58 < 0.023 Co-60 < 0.015 Zn-65 < 0.018 Nb-95 < 0.027 Zr-95 < 0.026 Cs-134 < 0.019 Cs-137 < 0.018 Ba-La-140 < 0.199 Ce-144 < 0.112 14-1

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

Collection: Semiannually Sample Description and Concentration (pCi!g wet) Cumulative Previous Average Average Downstream 1000' M-9 Date Collected 06-05-14 06-05-14 09-09-14 Lab Code MF- 2586 MF- 2587 MF- 4795 Sample Type Channel Catfish K-40 2.76 +/- 0.42 3.25 +/- 0.41 3.47 +/- 0.39 3.03 3.34 Mn-54 < 0.018 < 0.017 < 0.014 < 0.018 < 0.017 Fe-59 < 0.038 < 0.049 < 0.059 < 0.059 < 0.052 Co-58 < 0.023 < 0.028 < 0.020 < 0.028 < 0.023 Co-60 < 0.015 < 0.021 < 0.015 < 0.021 < 0.013 Zn-65 < 0.018 < 0.018 < 0.020 < 0.035 < 0.030 Nb-95 < 0.027 < 0.043 < 0.034 < 0.043 < 0.021 Zr-95 < 0.026 < 0.046 < 0.041 < 0.046 < 0.039 Cs-134 < 0.020 < 0.016 < 0.017 < 0.020 < 0.014 Cs-137 < 0.012 < 0.017 < 0.015 < 0.017 < 0.017 Ba-La-140 < 0.121 < 0.111 < 0.217 < 0.217 < 0.043 Ce-144 < 0.112 < 0.126 < 0.103 <0.126 <0.100 Date Collected 09-09-14 Lab Code MF- 4797 Sample Type Shorthead Redhorse K-40 2.64 +/- 0.34 Mn-54 < 0.012 Fe-59 < 0.048 Co-58 < 0.024 Co-60 < 0.012 Zn-65 < 0.035 Nb-95 < 0.034 Zr-95 < 0.043 Cs-134 < 0.013 Cs-137 < 0.012 Ba-La-140 < 0.161 Ce-144 < 0.115 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) 8 Date Collected 08-08-14 Lab Code MBO- 4162 NS8 Be-7 < 0.57 < 0.57 < 0.84 K-40 < 0.84 < 0.84 2.30 Mn-54 < 0.024 < 0.024 < 0.067 Fe-59 < 0.13 < 0.13 < 0.14 Co-58 < 0.068 < 0.068 < 0.073 Co-60 < 0.052 < 0.052 < 0.043 Zn-65 < 0.094 < 0.094 < 0.125 Zr-Nb-95 < 0.064 < 0.064 < 0.133 Ru-103 < 0.075 < 0.075 < 0.092 Ru-106 < 0.39 < 0.39 < 0.56 Cs-134 < 0.040 < 0.040 < 0.059 Cs-137 < 0.049 < 0.049 < 0.057 Ba-La-140 < 0.41 < 0.41 < 0.31 Ce-144 < 0.20 < 0.20 < 0.35 Downstream 1000' M-9 Date Collected 08-08-14 10-14-14 Lab Code MBO- 4164 MBO- 5649 Be-7 < 0.55 < 0.34 < 0.55 < 0.65 K-40 < 0.91 < 0.78 < 0.91 < 1.04 Mn-54 < 0.046 < 0.033 < o:o46 < 0.057 Fe-59 < 0.13 < 0.029 < 0.13 < 0.18 Co-58 < 0.046 < 0.028 < 0.046 < 0.074 Co-60 < 0.041 < 0.040 < 0.041 < 0.048 Zn-65 < 0.077 < 0.054 < 0.077 < 0.092 Zr-Nb-95 < 0.067 < 0.039 < 0.067 < 0.093 Ru-103 < 0.070 < 0.029 < 0.070 < 0.070 Ru-106 < 0.38 < 0.26 < 0.38 < 0.48 Cs-134 < 0.041 < 0.036 < 0.041 < 0.052 Cs-137 < 0.040 < 0.040 < 0.040 < 0.065 Ba-La-140 < 0.22 < 0.035 < 0.22 < 0.37 Ce-144 < 0.24 < 0.19 < 0.24 < 0.21 a "NS" = No sample; none sent.

15-1

MNGP Table 16. Broadleaf vegetation, analysis for iodine-131.

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

Location: Control (Cabbage)

Date Collected Lab Code Mn-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 1-131 Cs-134 Cs-137 Location: M-27 (Cabbage)

Date Collected Lab Code Mil-54 Fe-59 Co-58 Co-60 Zn-65 Nb-95 1-131 Cs-134 Cs-137

NO =No data; sample not collected. No river irrigated crops within 5 mile radius.

16-1

MNGP Table 17. 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 08-08-14 10-14-14 Lab Code MSS- 4172 MSS- 5651 Be-7 < 0.16 < 0.16 < 0.16 < 0.23 K-40 9.25 +/- 0.51 8.98 +/- 0.46 9.12 9.96 Mn-54 < 0.016 < 0.016 < 0.016 < 0.014 Fe"59 < 0.052 < 0.040 < 0.052 < 0.043 Co-58 < 0.011 < 0.016 < 0.016 < 0.017 Co-60 < 0.012 < 0.014 < 0.014 < 0.012 Zn-65 < 0.034 < 0.025 < 0.034 < 0.040 Nb-95 .< 0.015 < 0.015 < 0.015 < 0.019 Zr-95 < 0.028 < 0.020 < 0.028 < 0.040 Ru-103 < 0.018 < 0.017 < 0.018 < 0.021 Ru-106 < 0.071 < 0.075 < 0.07 < 0.12 Cs-134 < 0.010 < 0.012 < 0.012 < 0.011 Cs-137 < 0.012 0.028 +/- 0.012 < 0.012 < 0.016 Ba-La-140 < 0.081 < 0.081 < 0.081 < 0.078 Ce-144 < 0.081 < 0.047 < 0.081 < 0.088 Downstream 1000' M-9 Date Collected 08-08-14 10-14-14 Lab Code MSS- 4173 MSS- 5652 Be-7 < 0.27 < 0.19 < 0.27 0.42 K-40 11.07 +/- 0.53 10.09 +/- 0.53 10.58 9.33 Mn-54 < 0.015 < 0.018 < 0.018 < 0.020 Fe-59 < 0.068 < 0.027 < 0.068 < 0.061 Co-58 < 0.027 < 0.016 < 0.027 < 0.024 Co-60 < 0.016 < 0.010 < 0.016 < 0.010 Zn-65 < 0.040 < 0.027 < 0.040 < 0.053 Nb-95 < 0.044 < 0.012 < 0.044 < 0.026 Zr-95 < 0.042 < 0.020 < 0.042 < 0.057 Ru-103 < 0.030 < 0.010 < 0.030 < 0.028 Ru-106 < 0.14 < 0.16 < 0.16 <0.120 Cs-134 < 0.015 < 0.011 < 0.015 < 0.015 Cs-137 0.033 +/- 0.017 0.037 +/- 0.018 0.035 <0.019 Ba-La-140 < 0.11 < 0.061 < 0.11 < 0.059 Ce-144 < 0.12 < 0.11 < 0.12 < 0.11 17-1

MNGP Table 17. 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 08-08-14 10-14-14 Lab Code MSS- 4174 MSS- 5653 Be-7 < 0.22 < 0.21 < 0.22 0.27 K-40 11.46 +/- 0.59 10.32 +/- 0.53 10.89 10.58 Mn-54 < 0.016 < 0.017 < 0.017 < 0.017 Fe-59 < 0.040 < 0.032 < 0.040 < 0.041 Co-58 < 0.017 < 0.015 < 0.017 < 0.022 Co-60 < 0.013 < 0.011 < 0.013 < 0.012 Zn-65 < 0.038 < 0.045 < 0.045 < 0.036 Nb-95 < 0.025 < 0.023 < 0.025 < 0.028 Zr-95 < 0.039 < 0.022 < 0.039 < 0.029 Ru-103 < 0.019 < 0.026 < 0.026 < 0.024 Ru-106 < 0.074 < 0.10 < 0.102 < 0.126 Cs-134 < 0.011 < 0.014 < 0.014 < 0.014 Cs-137 0.059 +/- 0.022 < 0.016 0.059 0.035 Ba-La-140 < 0.092 < 0.065 < 0.092 < 0.11 Ce-144 < 0.076 < 0.088 < 0.088 <0.126 17-2

L-MT-15-036, 2014 Annual Radiological Environmental Operating Report

Contents

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1.0 INTRODUCTION

SUMMARY

6.0 REFERENCES

1.0 INTRODUCTION

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6.0 REFERENCES

6.0 REFERENCES

1.0 INTRODUCTION

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L-MT-15-036, 2014 Annual Radiological Environmental Operating Report

Text

1.0 INTRODUCTION

SUMMARY

6.0 REFERENCES

1.0 INTRODUCTION

SUMMARY

6.0 REFERENCES

6.0 REFERENCES

1.0 INTRODUCTION

SUMMARY

1.0 INTRODUCTION

1.0 INTRODUCTION

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