Text

Submittal of 2022 Annual Radiological Environmental Operating Report
	ML23130A188
Person / Time
Site:	Monticello
Issue date:	05/10/2023
From:	Hafen S; Northern States Power Company, Minnesota, Xcel Energy
To:	; Office of Nuclear Reactor Regulation, Document Control Desk
References
	L-MT-23-019
	Download: ML23130A188 (1)
	v • d • e

fl Xcel Energy 2807 West County Road 75 Monticello, MN 55362 May 10, 2023 L-MT-23-019 Tech Spec 5.6.1 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Monticello Nuclear Generating Plant Docket No. 50-263 Renewed Facility Operating License No. DPR-22 2022 Annual Radiological Environmental Operating Report Pursuant to the requirements of 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 following enclosures:

Enclosure 1 - 2022 Annual Radiological Environmental Operating Report Enclosure 2 - 2021 Annual Radiological Environmental Operating Report, Supplemental Information Summary of Commitments This letter makes no new commitments and no revisions to existing commitments.

Shawn C. jjafen Plant _s3,ffager, Monticello Nuclear Generating Plant Nortbn States Power Company - Minnesota Enclosures (2) cc: Administrator, Region Ill, USNRC Project Manager, Monticello, USNRC Resident Inspector, Monticello, USNRC Minnesota Department of Commerce

ENCLOSURE 1 2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM JANUARY 1

- DECEMBER 31, 2022 151 Pages Follow

Design&Consultancy ARCADIS I for natural and built assets

~ Xcel Energy RESPONSIBLE BY NATURE 2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT (AREOR)

Monticello Nuclear Generating Plant Last Updated: 4/28/2023

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL

_________________________________ OPERATING REPORT Michael Hay, PhD Principal Scientist Monticello Nuclear Generating Plant Quality Assurance Reviewer Prepared for:

Xcel Energy, Inc.

Prepared by:

Arcadis US, Inc.

630 Plaza Drive Suite 200 Lauren Leifels Highlands Ranch Project Manager Colorado 80129 Quality Assurance Reviewer Our Ref.:

30078625 Date: 4/28/2023 arcadis.com

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT CONTENTS Acryonyms and Abbreviations....................................................................................................................... v References ................................................................................................................................................... vii Executive Summary ................................................................................................................................ ES-1 Summary of Activities and Results ................................................................................................... ES-1 1 Introduction ............................................................................................................................................. 2 1.1 Site Description and Sample Locations ........................................................................................ 3 1.1.1 Site Description ................................................................................................................. 3 1.1.2 Rationale for Sample Locations ........................................................................................ 4 1.2 Scope and Requirements of the REMP ........................................................................................ 4 2 Radiological Environmental Sampling Program Requirements ............................................................. 6 2.1 Exposure Pathway and Sample Locations ................................................................................... 6 2.2 Maps of Sample Locations ......................................................................................................... 14 3 Statistical and Calculational Methodology ............................................................................................ 19 3.1 Trend Identification ..................................................................................................................... 19 3.2 Estimation of the Mean Value ..................................................................................................... 19 3.3 Lower Limit of Detection and Minimum Detectable Concentration ............................................. 20 3.4 Reporting Levels and Lower Limits of Detection for Radioactivity ............................................. 20 4 Interpretation of Results ....................................................................................................................... 24 4.1 Airborne Radioiodine and Particulates ....................................................................................... 24 4.2 Drinking Water ............................................................................................................................ 26 4.3 River Water ................................................................................................................................. 26 4.4 Groundwater ............................................................................................................................... 26 4.5 Broadleaf Vegetation .................................................................................................................. 27 4.6 Food Products ............................................................................................................................. 27 4.7 Fish ............................................................................................................................................. 27 4.8 Shoreline Sediment..................................................................................................................... 28 4.9 Direct Gamma Radiation ............................................................................................................ 29 4.9.1 Environmental TLD .......................................................................................................... 29 4.9.2 ISFSI TLD ........................................................................................................................ 30 5 Land Use Census ................................................................................................................................. 31 5.1 Purpose ....................................................................................................................................... 31 arcadis.com i

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 5.2 Methodology ............................................................................................................................... 32 5.3 2022 Land Use Census .............................................................................................................. 32 6 Quality Assurance................................................................................................................................. 35 6.1 Sample Collection ....................................................................................................................... 35 6.2 Sample Analysis ......................................................................................................................... 35 6.3 Dosimetry Analysis ..................................................................................................................... 35 6.4 Laboratory Equipment Quality Assurance .................................................................................. 35 6.4.1 Daily Quality Control ........................................................................................................ 35 6.4.2 Calibration Verification .................................................................................................... 35 6.5 General Engineering Laboratory, LLC ........................................................................................ 35 6.6 Environmental Dosimetry Company ........................................................................................... 36 7 Environmental Sampling Modifications ................................................................................................ 37 7.1 Program Modifications ................................................................................................................ 37 7.2 Change of Sampling Procedures ................................................................................................ 37 7.3 Change of Analysis Procedures ................................................................................................. 37 7.4 Sample Deviations and Unavailable Analyses ........................................................................... 37 7.5 Analytical Deviations ................................................................................................................... 39 8 Radiological Environmental Monitoring Program - Summary of Results............................................. 40 8.1 Radiological Environmental Monitoring Program Data Summary .............................................. 40 9 Errata to Previous Reports ................................................................................................................... 45 9.1 Errata to the MNGP AREOR ...................................................................................................... 45 10 Radiological Environmental Monitoring Program Results .................................................................... 46 10.1 Detection of Activity .................................................................................................................... 47 arcadis.com ii

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT TABLES Table 2.1-1: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Airborne (ODCM 07.01 Table 1) ........................................................ 6 Table 2.1-2: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Direct Radiation (ODCM 07.01 Table 1) ............................................ 7 Table 2.1-3: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Waterborne (ODCM 07.01 Table 1)................................................... 8 Table 2.1-4: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Ingestion (ODCM 07.01 Table 1) ....................................................... 9 Table 2.1-5: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis (ODCM 07.01 Table 4)...................................................................... 10 Table 3.4-1: Reporting Levels for Radioactivity Concentrations in Environmental Samples (ODCM 07.01 Table 2) ................................................................................................................................................. 21 Table 3.4-2: Maximum Values for the Lower Limits of Detection (LLD) (ODCM 07.01 Table 3) ................ 22 Table 3.4-3: Analysis and Frequency of Samples ...................................................................................... 23 Table 5.3-1: Summary of Highest Location for Each Pathway in 2022 ...................................................... 34 Table 7.4-1: Sample Deviations and Unavailable Analysis ........................................................................ 38 Table 7.5-1: Analytical Deviations ............................................................................................................... 39 Table 8.1-1: Radiological Environmental Monitoring Program Summary ................................................... 41 DATA TABLES Airborne Cartridge: Radioiodine .................................................................................................................. 48 Airborne Particulates: Gross Beta ............................................................................................................... 51 Airborne Particulates: Gamma Isotopic ...................................................................................................... 53 Sediment: Gamma Isotopic ......................................................................................................................... 56 Tissue - Fish: Gamma Isotopic .................................................................................................................. 58 Tissue - Plant: Gamma Isotopic ................................................................................................................. 59 Water: Tritium .............................................................................................................................................. 60 Water - Drinking: Gross Beta ..................................................................................................................... 61 Water - Groundwater: Gamma Isotopic ..................................................................................................... 62 Water - Drinking: Gamma Isotopic ............................................................................................................. 64 Water - Surface: Gamma Isotopic .............................................................................................................. 65 Direct Radiation - TLD: Gamma ................................................................................................................. 68 Direct Radiation - ISFSI: Gamma ............................................................................................................... 70 arcadis.com iii

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT FIGURES Figure 1.0-1: Monitored Potential Exposure Pathways ................................................................................. 3 Figure 2.2-1: Radiation Environmental Monitoring Program (ODCM 07.01 Figure 1) ................................ 14 Figure 2.2-2: 4 - 5 Mile Ring and Special Interest TLD Locations (ODCM 07.01 Figure 2) ....................... 15 Figure 2.2-3: Site Boundary TLD Locations (ODCM 07.01 Figure 3) ......................................................... 16 Figure 2.2-4: Control Locations (ODCM 07.01 Figure 4) ............................................................................ 17 Figure 2.2-5: ISFSI TLD Locations (ODCM 07.01 Figure 5) ....................................................................... 18 Figure 4.1-1: Graph of Historical Airborne Particulate Gross Beta ............................................................. 24 Figure 4.1-2: Graph of 2022 Average Airborne Particulate Gross Beta for Indicator and Control Locations .............................................................................................................................................. 25 Figure 4.2-1: Graph of Historical Gross Beta for Drinking Water Sample .................................................. 26 Figure 4.8-1: Graph of Historical Cesium-137 in River Sediment ............................................................... 28 Figure 4.9.1-1: Graph of Direct Gamma Radiation Measurements ............................................................ 29 Figure 4.9.1-2: Graph of Historical Direct Gamma Measurements............................................................. 30 EQUATIONS Equation 1 ................................................................................................................................................... 19 APPENDICES Appendix A GEL Laboratories, LLC 2022, Annual Quality Assurance Report Appendix B Environmental Dosimetry Company, Annual Quality Assurance Status Report, January -

December 2022 arcadis.com iv

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT ACRYONYMS AND ABBREVIATIONS AREOR Annual Radiological Environmental Operating Report BTP Radiological Assessment Branch Technical Position, Rev. 1, on Radiological Monitoring CFR Code of Federal Regulations D/Q Deposition Coefficient E East EDC Environmental Dosimetry Company ENE East-Northeast ESE East-Southeast ft feet ft2 square feet GEL General Engineering Laboratories LLC GPS Global Positioning System ISFSI Independent Spent Fuel Storage Installation LLD lower limit of detection LOD limit of detection MDA minimum detectable activity MDC minimum detectable concentration MDL minimum detection limit mi mile MNGP Monticello Nuclear Generating Plant mrem millirem MWe megawatt electric N North NE Northeast NIST National Institute of Standards and Technology NNE North-Northeast NNW North-Northwest NRC Nuclear Regulatory Commission NW Northwest OCA owner-controlled area ODCM Offsite Dose Calculation Manual arcadis.com v

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT pCi/g picocurie per gram pCi/L picocurie per liter pCi/kg picocurie per kilogram pCi/m3 picocurie per cubic meter REMP Radiological Environmental Monitoring Program S South SE Southeast SSE South-Southeast std quarter Standard quarter, 91 days SSW South-Southwest SW Southwest TLD Thermoluminescent Dosimeter USB Universal Serial Bus W West WNW West-Northwest WSW West-Southwest arcadis.com vi

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT REFERENCES Arnold, J.R., and H.A. Al-Salih. 1955. Beryllium-7 Produced by Cosmic Rays. Science. April 121(3144):

451-453.

Barnett, F., P. Carson, T. Linscome-Hatfield, and H. Brittingham. ProUCL 5.2. U.S. Environmental Protection Agency, Washington, DC, 2022.

Code of Federal Regulations (CFR), 10 CFR Appendix I to Part 50 - Numerical Guides for Design Objectives and Limiting Conditions for Operation To Meet the Criterion "As Low as is Reasonably Achievable" for Radioactive Material in Light-Water-Cooled Nuclear Power Reactor Effluents, January 2002.

Code of Federal Regulations (CFR), 40 CFR Part 141- National Primary Drinking Water Regulations, December 1975.

MNGP Chemistry Manual, Procedure I.05.41, Annual Land Use Census and Critical Receptor Identification.

Nuclear Regulatory Commission (NRC) Generic Letter 79-65 Radiological Environmental Monitoring Program Requirements Enclosing Branch Technical Position (BTP), Revision 1, November 1979.

NUREG 1302 Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Boiling Water Reactors, April 1991.

Offsite Dose Calculation Manual (ODCM) 07.01 Monticello Nuclear Generating Plant, Revision 26.

Regulatory Guide 4.15 Quality Assurance for Radiological Monitoring Programs, Revision 1, 1979.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT EXECUTIVE

SUMMARY

This 2022 Annual Radiological Environmental Operating Report (AREOR) describes the Monticello Nuclear Generating Plant (MNGP) Radiological Environmental Monitoring Program (REMP) and program results for the 2022 calendar year.1 MNGP is operated by Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (Xcel) under a license granted by the U.S. Nuclear Regulatory Commission (NRC).

Provisions of NRCs NUREG-1302, NRC Generic Letter 79-65 Branch Technical Position, MNGP Technical Specifications, and MNGPs Offsite Dose Calculation Manual (ODCM) establish the requirements of the REMP. This AREOR describes the purpose and scope of MNGPs REMP, along with the monitoring and sampling results for the reporting period.

AREOR Contents This AREOR includes the following:

Identification of sampling locations Descriptions of environmental sampling and analysis procedures Comparisons of present environmental radioactivity levels and historical environmental data Analyses of trends in environmental radiological data as potentially affected by MNGP operations Photo Credit: Daniel Thurston, Chemistry Supervisor, MNGP A summary of environmental radiological sampling results Plant Stack, used for dispersing treated gaseous effluents, Monticello Nuclear Quality assurance practices, sampling deviations, Generating Plant in Winter unavailable samples, and program changes, as applicable Summary of Activities and Results Sampling activities were conducted as prescribed by MNGPs ODCM. Required analyses were performed and detection capabilities were met for the collected samples required by the ODCM. To compile data for this AREOR, 825 samples were analyzed, yielding 1,791 test results. Based on the annual MNGP Land Use Census, the current number of sampling sites for MNGP is sufficient. Concentrations observed in the environment in 2022 for MNGP-related radionuclides were within the ranges of concentrations observed in the past. The continued operation of MNGP has not contributed measurable radiation to the environment.

1 Some of the composite samples which correspond to Quarter 4 and December 2022 extended to January 3rd 2023.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 1 INTRODUCTION Photo Credit: Daniel Thurston, Chemistry Supervisor, MNGP Welcome to Monticello Nuclear Generating Plant The Radiological Environmental Monitoring Program (REMP) for the Monticello Nuclear Generating Plant (MNGP),2 located in Monticello, Minnesota, provides data on measurable levels of radiation and radioactive materials in the area surrounding the Site3 and evaluates the relationship between quantities of radioactive materials released from MNGP and the resultant doses to individuals from principal pathways of exposure.

At any given nuclear utility in the United States, REMPs are designed to provide a check on a nuclear utilitys Effluent Release Program4 and dispersion modeling to ensure that radioactive effluent concentrations in the air, terrestrial, and aquatic environments conform to the As Low As Reasonably Achievable (ALARA) design objectives of Appendix I of Chapter 10 of the Code of Federal Regulations (CFR) Part 50 (CFR, 2002).

This 2022 Annual Radiological Environmental Operating Report (AREOR) has been prepared by Arcadis U.S., Inc. and presents a summary of the environmental data from exposure pathways, interpretations of that data, along with analyses and trends of the results covering the 2022 calendar year.5 2

In this document, a distinction is made between MNGP, Site, and Plant. MNGP is the name of the facility. Site refers to the entire areal extent of MNGPs property, including the uncontrolled and controlled areas. Plant refers to the controlled area. The REMP involves monitoring and sampling at various locations across the Site and offsite locations.

3 Referred to as the Site environs.

4 The Effluent Release Program is separate but related to the REMP. Both are required by federal regulations.

5 Some of the composite samples which correspond to Quarter 4 and December 2022 extended to January 3rd 2023.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Figure 1.0-16 below illustrates various exposure pathways7 for receptors.8 Routinely monitored pathways include ingestion, inhalation, and direct radiation. Exposure pathways are based on Site-specific information, such as the locations and habitats of receptors, the ages of those receptors, and the distance and relationship of those receptors with respect to release points and water usage around MNGP. A Site-specific REMP has been developed and maintained in accordance with MNGPs ODCM, NUREG-1302, and the Branch Technical Position on Radiological Environmental Monitoring.

livestock Products Figure 1.0-1: Monitored Potential Exposure Pathways 1.1 Site Description and Sample Locations 1.1.1 Site Description Located in Wright County, Minnesota, MNGP is located along the Mississippi River and is approximately 40 miles northwest of the Twin Cities of Minneapolis and St. Paul. MNGP generates commercial electrical 6

7 An exposure pathway describes the route of the radiological exposure from a source. The primary radiological emissions from the Site are airborne discharges. The following pathways are monitored as part of MNGPs REMP: external dose, ingestion of radioactive material, and inhalation of radioactive material.

8 Living things that can be affected by radioactive effluent releases are referred to as environmental receptors.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT power via a boiling water reactor with a nominal generating capacity of 681 megawatts electric (MWe).

Commercial production was initiated on June 30, 1971.

1.1.2 Rationale for Sample Locations The REMP was established to assess the exposure pathways to humans. Specific methods and different environmental media are required to assess each pathway. Sampling locations for the Site are chosen based upon meteorological factors, preoperational monitoring, and results of the land use surveys. A number of sample points are selected as control locations because they are distant enough to preclude any MNGP effect, and thus, unaffected by Site operations. MNGPs REMP sampling locations and the Thermoluminescent Dosimeter (TLD) monitoring locations are discussed in Section 2 of this AREOR.

1.2 Scope and Requirements of the REMP MNGPs REMP is based on U.S. Nuclear Regulatory Commission (NRC) guidance, is conducted in accordance with MNGPs ODCM, and is furthermore guided by applicable procedures for sample media, sampling locations, sampling frequency, and analytical sensitivity requirements. Indicator and control locations were established for comparison purposes to distinguish radioactivity originating from the Plant versus that from natural or other anthropogenic9 sources. This program provides for surveillance of appropriate critical exposure pathways to man, protects vital interests of members of the public, and is intended to satisfy compliance with state and federal environmental agencies. Section 3 lists the reporting levels and sample collection frequency for detection of radioactivity in the environment.

9 An anthropogenic source refers to radioactivity from a manmade substance, as well as radioactivity from natural sources that would not otherwise normally be present in the environment either in an amount, concentration, and/or at a specified rate, without human intervention.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Photo Credit: Daniel Thurston, Chemistry Supervisor, MNGP Blooming Trees at Monticello Nuclear Generating Plant The Annual Land Use Census, required by MNGPs ODCM, is performed to ensure changes in the use of areas at or beyond the Site boundary are identified and that appropriate modifications to the REMP are made if necessary. This census satisfies the requirements of Section IV.B.3 of Appendix I to 10 CFR Part 50 (CFR, 2002). Results are described in Section 5 of this document.

In addition, participation in an interlaboratory comparison program is performed in fulfillment of MNGPs ODCM operational requirements. The comparison program provides for independent checks on the precision and accuracy of measurements of radioactive material in REMP sample matrices. These checks are performed as part of the quality assurance (QA) program for environmental monitoring to demonstrate that the results are valid for the purposes of Section IV.B.2 of Appendix I to 10 CFR Part 50 (CFR, 2002) and Regulatory Guide 4.15 Quality Assurance for Radiological Environmental Monitoring Programs" (Regulatory, 1979). Appendix A of this 2022 AREOR summarizes the results obtained as part of this comparison program.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 2 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS Figures 2.2-1 through 2.2-5 depict MNGPs REMP sampling locations and the TLD monitoring locations.

The location numbers shown on these maps correspond to locations listed in Tables 2.1-1 through 2.1-5.

Guidance for the format and layout of these tables and figures is derived from MNGPs ODCM.

2.1 Exposure Pathway and Sample Locations Table 2.1-1 below presents the sample frequency and collection based on Deposition Coefficients (D/Qs),

analysis type, and number of samples versus their locations for airborne radioiodine and particulates.

Table 2.1-1: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Airborne (ODCM 07.01 Table 1)

Exposure Pathway Number of Samples and Sample Sampling and Type and Frequency of and/or Sample Locations** Collection Frequency Analysis

1. Airborne Samples from five locations: Continuous sampler Radioiodine analysis Weekly Radioiodine & three samples from offsite locations operation with sample for I-131 Particulates (in different sectors) of the highest collection weekly.

calculated annual average ground Particulate:

level D/Q, one sample from the Gross beta activity on each vicinity of a community having the filter weekly* Analysis highest calculated annual average SHALL be performed more ground-level D/Q, and one sample than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following filter from a control location specified in change.

Table 2.1-5. Perform gamma isotopic analysis on composite (by location) sample quarterly.

Notes:

If gross beta activity in any indication sample exceeds 10 times the yearly average of the control sample, a gamma isotopic analysis is required.

- Sample locations are further described in Table 2.1-5.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-2 below presents the sample frequency and collection, analysis type, and number of samples versus their locations for direct radiation.

Table 2.1-2: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Direct Radiation (ODCM 07.01 Table 1)

Exposure Pathway Number of Samples and Sample Sampling and Type and Frequency of and/or Sample Locations** Collection Frequency Analysis

2. Direct Radiation 40 TLD stations established with Quarterly Gamma/Neutron Dose duplicate dosimeters placed at the quarterly following locations:****

1. Using the 16 meteorological sectors as guidelines, an inner ring of stations in the general area of the site boundary is established and an outer ring of stations at a distance of 4 to 5 miles distance from the plant site is established.

Because of inaccessibility, two sectors in the inner ring are not covered.

2. Ten dosimeters are established at special interest areas and four control stations.

3. Three neutron and gamma dosimeter sets are located along the OCA fence. Additionally, three neutron dosimeters are stationed with special interest and inner ring TLDs and four neutron control dosimeters are stationed with the REMP control TLDs.

Notes:

- Sample locations are further described in Table 2.1-5.

- - - Three control TLD locations have only one dosimeter.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-3 below presents the sample frequency and collection, analysis type, and number of samples versus their locations for waterborne pathways.

Table 2.1-3: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Waterborne (ODCM 07.01 Table 1)

Exposure Pathway Number of Samples and Sampling and Type and Frequency of and/or Sample Sample Locations** Collection Frequency Analysis

3. Waterborne

a. Surface Water Upstream and downstream Monthly composite of Gamma Isotopic analysis of each locations weekly samples (water monthly composite and ice conditions permitting) Tritium analysis of quarterly composites of monthly composites

b. Groundwater Three samples from wells Quarterly Gamma Isotopic and tritium within 5 miles of the MNGP analyses of each sample and one sample from a well greater than 10 miles from the MNGP

c. Drinking Water One sample from the City of Composite of 2 weekly I-131 analysis on each bi-weekly Minneapolis water supply samples when I-131 composite when the dose analysis is performed; calculated for the consumption of monthly composite of the water is greater than weekly samples 1 millirem (mrem) per year#

otherwise Composite for gross beta and gamma isotopic analyses monthly Composite for tritium analysis quarterly

d. Sediment from One sample upstream of the Semiannually Gamma isotopic analysis of each Shoreline MNGP, one sample sample downstream of the MNGP, and one sample from the shoreline of the recreational area Notes:

- Sample locations are further described in Table 2.1-5.

The dose shall be calculated for the maximum organ and age group, using the methodology and parameters in the ODCM.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-4 below presents the sample frequency and collection, analysis type, and number of samples versus their locations for ingestion pathways.

Table 2.1-4: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis: Ingestion (ODCM 07.01 Table 1)

Sampling and Exposure Pathway Number of Samples and Sample Collection Type and Frequency of and/or Sample Locations** Frequency Analysis

4. Ingestion

a. Milk Samples from milking animals in three Biweekly when Gamma Isotopic and Iodine-locations within 3 miles from the MNGP animals are on 131 analysis of each sample having the highest dose potential; if pasture; monthly there are none, then one sample from at other times milking animals in each of three areas between 3 to 5 miles from the MNGP where doses are calculated to be greater than 1 mrem per year#

One sample from milking animals at a control location, 10 to 20 miles from the MNGP and in the least prevalent wind direction

b. Vegetation Samples of vegetation grown closest to Monthly during Gamma Isotopic and Iodine-each of the two offsite locations of growing season 131 analysis of each sample highest predicted annual average D/Q if milk sampling is not performed, and one sample from 10 to 20 miles in the least prevalent wind direction

c. Fish One sample of one game species of fish Samples collected Gamma isotopic analysis on located upstream and downstream of semi-annually each sample (edible portion the MNGP only on fish)

d. Food Products One sample of corn and potatoes from At time of harvest Gamma isotopic analysis of any area that is irrigated by water in edible portion of each sample which liquid radioactive effluent has been discharged***

Notes:

- Sample locations are further described in Table 2.1-5.

- - As determined by methods outlined in Section 2.3 of the ODCM 07.01.

The dose shall be calculated for the maximum organ and age group, using the methodology and parameters in the ODCM.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-5 below presents the location, code designation, and referenced collection site for a given sample type.

Table 2.1-5: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis (ODCM 07.01 Table 4)

Location Distance Compass Type of Sample Code Collection Site Miles Heading Sector River water M-8c Upstream of Plant within 1,000 ft upstream of Plant intake River water M-9 Downstream of Plant within 1,000 ft downstream of Plant discharge Drinking water M-14 City of Minneapolis 37.0 132 SE Groundwater M-43c Imholte Farm 12.3 313 NW Groundwater M-11 City of Monticello 3.3 127 SE Groundwater M-12 Plant Well No. 11 0.26 252 WSW Groundwater M-55 Hasbrouck Residence 1.60 255 WSW Sediment-River M-8c Upstream of Plant within 1,000 ft upstream of Plant intake Sediment-River M-9 Downstream of Plant within 1,000 ft downstream of Plant discharge Sediment-Shoreline M-15 Montissippi Park 1.27 114 ESE Fish M-8c Upstream of Plant within 1,000 ft upstream of Plant intake Fish M-9 Downstream of Plant within 1,000 ft downstream of Plant discharge Vegetation* M-41 Training Center Near 0.8 151 SSE Vegetation* M-42** Biology Station Road Near 0.7 136 SE M-42A** Near 0.7 108 ESE Vegetation* M-43c Imholte Farm Near 12.3 313 NW Cultivated Crops (corn)*** - -

(potatoes)*** - -

Notes:

Actual location for vegetation sampling may vary depending on availability of broad leaf plant species. The nearest available broad leaf specimens to the location should be used.

- M-42 is the preferred sampling location; however, M-42A may be used in place of M-42, if samples are not available at the preferred location.

- - Collected only if Plant discharges radioactive effluent into the river, then only from river irrigated fields, as determined by Section 2.1 of the ODCM 07.01.

Code letters are defined below:

c = Locations of control samples (used for control air sampler and water control sample) arcadis.com 10

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-5: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis (ODCM 07.01 Table 4) (Continued)

Location Distance Compass Type of Sample Code Collection Site Miles Heading Sector Particulates and Radioiodine (air) M-1c Air Station M-1 11.0 307 NW (air) M-2 Air Station M-2 0.8 140 SE (air) M-3 Air Station M-3 0.6 104 ESE (air) M-4 Air Station M-4 0.8 147 SSE (air) M-5 Air Station M-5 2.6 134 SE Direct Radiation Inner Ring - (general area of the site boundary)

(TLD) M01A Sherburne Ave. So. 0.75 353 N (TLD) M02A Sherburne Ave. So. 0.79 23 NNE (TLD) M03A Sherburne Ave. So. 1.29 56 NE (TLD) M04A Biology Station Rd. 0.5 92 E (TLD) M05A Biology Station Rd. 0.48 122 ESE (TLD) M06A Biology Station Rd. 0.54 138 SE (TLD) M07A Parking Lot H 0.43 157 SSE (TLD) M08A Parking Lot F 0.45 175 S (TLD) M09A County Road 75 0.38 206 SSW (TLD) M10A & ISFSI- County Road 75 0.38 224 SW 15 (neutron)

(TLD) M11A County Road 75 0.4 237 WSW (TLD) M12A & ISFSI- County Road 75 0.5 262 W 14 (neutron)

(TLD) M13A North Boundary Rd. 0.89 322 NW (TLD) M14A North Boundary Rd. 0.78 335 NNW Notes:

Code letters are defined below:

A = Locations in the general area of the site boundary C = Locations of control samples (used for control air sampler and water control sample) arcadis.com 11

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-5: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis (ODCM 07.01 Table 4) (Continued)

Location Distance Compass Type of Sample Code Collection Site Miles Heading Sector Direct Radiation Outer Ring - (about 4 to 5 miles distant from the Plant)

(TLD) M01B 117th Street 4.65 1 N (TLD) M02B County Road 11 4.4 18 NNE (TLD) M03B County Rd. 73 & 81 4.3 51 NE (TLD) M04B County Rd. 73 (196th Street) 4.2 67 ENE (TLD) M05B City of Big Lake 4.3 89 E (TLD) M06B County Rd 14 &

4.3 117 ESE 196th Street (TLD) M07B Monticello Industrial Dr. 4.3 136 SE (TLD) M08B Residence Hwy 25 &

4.6 162 SSE Davidson Ave (TLD) M09B Weinand Farm 4.7 178 S (TLD) M10B Reisewitz Farm - Acacia Ave 4.2 204 SSW (TLD) M11B Vanlith Farm - 97th Ave 4.0 228 SW (TLD) M12B Lake Maria St. Park 4.2 254 WSW (TLD) M13B Bridgewater Sta. 4.1 270 W (TLD) M14B Anderson Res. - Cty Rd 111 4.3 289 WNW (TLD) M15B Red Oak Wild Bird Farm 4.3 309 NW (TLD) M16B University Ave and Hancock 4.4 341 NNW St, Becker Notes:

Code letters are defined below:

B = Locations about 4 to 5 miles distant from MNGP arcadis.com 12

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 2.1-5: Monticello Nuclear Generating Plant Radiological Environmental Monitoring Program Sample Collection and Analysis (ODCM 07.01 Table 4) (Continued)

Location Distance Compass Type of Sample Code Collection Site Miles Heading Sector Direct Radiation - (special interest locations)

(TLD) M01S 127th Street NE 0.66 241 WSW (TLD) M02S & ISFSI- Krone Residence 0.5 220 SW 16 (neutron)

(TLD) M03S Big Oaks Park 1.53 103 ESE (TLD) M04S Pinewood School 2.3 131 SE (TLD) M05S 20500 Co. Rd 11, 3.0 118 ESE Big Lake (TLD) M06S Monticello Public Works 2.6 134 SE (TLD) I-11 & ISFSI-11 OCA Fence South, on 0.31 222 SW (neutron) exit road (TLD) I-12 & ISFSI-12 OCA Fence Middle, on 0.32 230 SW (neutron) exit road (TLD) I-13 & ISFSI-13 OCA Fence North, on 0.34 240 WSW (neutron) exit road Direct Radiation Controls - (10 to 12 miles distant from Plant)

(TLD) M01C & Kirchenbauer Farm 11.5 323 NW Neutron Control D

(TLD) M02C & Cty Rd 4 & 15 11.2 47 NE Neutron Control C

(TLD) M03C & Cty Rd 19 & Jason Ave 11.6 130 SE Neutron Control A

(TLD) M04C & Maple Lake Water Tower 10.3 226 SW Neutron Control B

Notes:

Code letters are defined below:

C = Locations of control samples (used for control air sampler and water control sample)

S = Special interest locations arcadis.com 13

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 2.2 Maps of Sample Locations Figure 2.2-1 below illustrates the sampling locations associated with surface water, well water, air, and vegetation.

>~ '~.

PREDOMINANT\

WIND DIRECTION BECKER

-~ ..r.---- - Highest D/Q Garden O' 1000' 2000' N

j-:1PROCCDR'OOCM.C7.0l.!Mll I Figure 2.2-1: Radiation Environmental Monitoring Program (ODCM 07.01 Figure 1) arcadis.com 14

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Figure 2.2-2 below illustrates the locations of the 4- to 5-mile ring and special interest TLD monitoring stations.

I~

Figure 2.2-2: 4 - 5 Mile Ring and Special Interest TLD Locations (ODCM 07.01 Figure 2) arcadis.com 15

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Figure 2.2-3 below illustrates the locations of site boundary TLD monitoring stations.

i i'

i*-----

Figure 2.2-3: Site Boundary TLD Locations (ODCM 07.01 Figure 3) arcadis.com 16

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Figure 2.2-4 below illustrates the control sample locations.

Figure 2.2-4: Control Locations (ODCM 07.01 Figure 4) arcadis.com 17

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Figure 2.2-5 illustrates the ISFSI TLD locations.

M 1, I ..;> L M I u '--_,,.,,,,,.

/ BIN[

/ 8 o*r 1-02 N ,.

I 1-03 I - . *-- .

t GRADE 1-04 I ELE /

935 *~1SL 11-05 I

[TI[] " ~* 1-07

/ -. ____ 1-06 1-12 1-11 1 ISFSl-15

/

Figure 2.2-5: ISFSI TLD Locations (ODCM 07.01 Figure 5) arcadis.com 18

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 3 STATISTICAL AND CALCULATIONAL METHODOLOGY 3.1 Trend Identification The REMP is not only intended to determine levels of radionuclides in the environment associated with MNGPs operations, but to evaluate trends in those levels over a period of time. If the data indicate a trend in the concentration of a radionuclide in an environmental medium, it could indicate that reactor operations are causing that particular radionuclide to fluctuate in the environment. Understanding effluent releases from MNGP is necessary to identify and interpret trends (or lack of trends) based on environmental data.

Factors that may affect environmental levels of radionuclides include prevailing weather conditions (e.g.,

periods of drought, solar cycles, and extreme precipitation events) and construction activities in close proximity to MNGP of a given sampling location.10 Some of these factors may be obvious, such as, the increase of airborne particulate beryllium-7 concentration due to atmospheric mixing or increase of surface water tritium due to atmospheric deposition from heavy precipitation events, while others are sometimes unknown.

In some cases, a Mann-Kendall trend test was used to determine whether a statistically significant trend is apparent in a dataset. Mann-Kendall tests were conducted at a 95 percent confidence level using ProUCL Version 5.2 (Barnett et al., 2022).

3.2 Estimation of the Mean Value A widely used statistical calculation was performed on the raw data collected under the sample analysis program. The calculation involved determining the mean value for the indicator and control samples for each sample medium. The mean value was used in the reduction of the data generated by the sampling and analysis of the various media in the REMP. Net activity (or concentration)" is the activity (or concentration) determined to be present in the sample. No minimum detectable activity (or concentration),

lower limit of detection, less than level, or negative activities or concentrations are included in the calculation of the mean. Equation 1 below was used to calculate the estimated mean. The estimated mean is equal to the sum of all the individual sample values, beginning with the first sample, divided by the total number of samples.

N x = xi i=1 N

(Equation 1)

Where:

x = estimate of the mean i = individual sample N = total number of samples with a net activity (or concentration) xi = net activity (or concentration) for sample i 10 Additionally, from time to time, the trends may be affected by statistical additions or exclusions of known sources of radioactive material. For instance, there is a measurable amount of radioactivity attributable to the 1986 Chernobyl accident and the 2011 Japan earthquake and tsunami, which triggered the Fukushima Dai-ichi Nuclear Power Plant incident. It is important to note whether these factors are being accounted for, as they affect radiological environmental measurements, even though they are not attributable to MNGP.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT When mean values are proceeded by a "+/-" value in the text, the +/- value represents the standard deviation of the individual values used to estimate the mean.

3.3 Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) and minimum detectable concentration (MDC) are used throughout the REMP and are defined as follows.

LLD is defined in the ODCM as the smallest concentration of radioactive material in a sample that will yield a net count above the system background that will be detected with 95 percent probability; i.e.,

only a 5 percent probability of falsely concluding that a blank observation represents a real signal.

The LLD is an a priori (i.e., before the fact) measurement. The actual LLD is dependent upon the standard deviation of the background-counting rate, the counting efficiency, the sample size (mass or volume), the radiochemical yield, and the radioactive decay of the sample between sample collection and counting. The required LLDs for each sample medium and selected radionuclides are provided in the ODCM and listed in Table 3.4-2.

MDC is the net counting rate (sample after subtraction of background) that must be surpassed before a sample is considered to contain a scientifically measurable amount of a radioactive material exceeding background amounts. The MDC is calculated using a sample background and may be thought of as an "actual" LLD for a particular sample measurement.

Certain gross counting measurements display a calculated negative value, indicating background is greater than sample activity. In these instances, it does not mean that radioactivity is removed from the environment. Instead, the measurement errors associated with the radiochemical analysis have fluctuated causing the background count rate to be greater than the sample count rate.

3.4 Reporting Levels and Lower Limits of Detection for Radioactivity Reporting levels and LLDs for activity found in environmental samples are listed in Table 3.4-1 and Table 3.4-2. Required REMP sample analyses and their frequencies are listed in Table 3.4-3.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 3.4-1: Reporting Levels for Radioactivity Concentrations in Environmental Samples (ODCM 07.01 Table 2)

Airborne Fish Milk Vegetables Analysis Water (pCi/L) Particulate or Gas Tritium (H-3)

I 20,000a I (pCi/m3) I (pCi/kg, wet)

I (pCi/L)

I (pCi/kg, wet)

Manganese-54 (Mn-1,000 30,000 54)

Iron-59 (Fe-59) 400 10,000 Cobalt-58 (Co-58) 1,000 30,000 Cobalt-60 (Co-60) 300 10,000 Zinc-65 (Zn-65) 300 20,000 Zirconium-95 and Niobium-95 (Zr-Nb- 400b 95)

Iodine-131 (I-131) 2c 0.9 3 100 Cesium-134 (Cs-134) 30 10 1,000 60 1,000 Cesium-137 (Cs-137) 50 20 2,000 70 2,000 Barium-140 and Lanthanum-140 (Ba- 200b 300b La-140)

Notes:

a For drinking water samples. This is a 40 CFR Part 141 (CFR, 1975) value. If no drinking water pathway exists, a value of 30,000 pCi/L may be used.

b Total for parent and daughter product.

c If no drinking water pathways exist, a value of 20 pCi/L may be used.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 3.4-2: Maximum Values for the Lower Limits of Detection (LLD) (ODCM 07.01 Table 3)

Airborne Fish Food Water Milk Sediment Analysis Particulate or (pCi/kg, Products Gross beta I (pCi/l) 4 I Gas (pCi/m3) 0.01 I wet) I (pCi/L)

I (pCi/kg, wet) I (pCi/kg, dry)

Tritium (H-3) 2000a Manganese-54 15 130 (Mn-54)

Iron-59 (Fe-59) 30 260 Cobalt-58 and Cobalt-60 (Co-58, 15 130 60)

Zinc-65 (Zn-65) 30 260 Zirconium-95 and Niobium-95 (Zr- 15b Nb-95)

Iodine-131 (I-131) 1c 0.07 1 60 Cesium-134 (Cs-15 0.05 130 15 60 150 134)

Cesium-137 (Cs-18 0.06 150 18 80 180 137)

Barium-140 and Lanthanum-140 15b 15b (Ba-La-140)

Notes:

a If no drinking water pathway exists, a value of 3000 pCi/L may be used.

b The specified LLD applies to the daughter nuclide of an equilibrium mixture of the parent and daughter nuclides.

Per the Radiological Assessment Branch Technical Position (BTP), the following values may be used for individual nuclide LLDs when equilibrium conditions are not met: 30 pCi/L for zirconium-95, 15 pCi/L for niobium-95, 60 pCi/L for barium-140, and 15 pCi/L for lanthanum-140.

c If no drinking water pathway exists, a value of 15 pCi/L may be used.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 3.4-3: Analysis and Frequency of Samples Pathway I Sample Location I Type I I-131 I Gross Beta I Gamma Isotopic 1

I Tritium I Gamma Dose Airborne Particulate and Radioiodine M-1 Air Station M-1 Control W W Q M-2 Air Station M-2 W W Q1 M-3 Air Station M-3 W W Q1 M-4 Air Station M-4 W W Q1 M-5 Air Station M-5 W W Q1 Direct Radiation M01C to M04C Control Q M01A to M14A Q M01B to M16B Q M01S to M06S Q I-11 to 1-13 Q Waterborne: River Water M-8c Upstream of MNGP Control M1 Q1 M-9 Downstream of MNGP M1 Q1 Waterborne: Groundwater M-43c Imholte Farm Control Q Q M-11 City of Monticello Q Q M-12 Plant Well No. 11 Q Q M-55 Hasbrouck Residence Q Q Waterborne: Drinking Water M-14 City of Minneapolis BW1,2 M1 M1 Q1 Waterborne: Sediment M-8c Upstream of Plant Control SA M-9 Downstream of Plant SA M-15 Montissippi Park SA Ingestion: Milk - M/BW3,4 M/BW3,4 Ingestion: Vegetation M-43c Imholte Farm Control M5 M5 M-41 Training Center M5 M5 M-42 Biology Station Road M5 M5 Ingestion: Fish M-8c Upstream of Plant Control SA M-9 Downstream of Plant SA Ingestion: Food Products - A3 Notes:

1 Composite of weekly samples.

2 Iodine-131 analysis included on each bi-weekly composite when the dose from the consumption of the water is greater than 1 mrem/year. (ODCM Revision 26) 3 This pathway is currently unavailable at MNGP.

4 Every two weeks when animals are on pasture; monthly at other times.

5 During growing season when milk samples are unavailable.

W = weekly BW = every two weeks M = monthly Q = quarterly SA = semi-annually A = annually arcadis.com 23

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 4 INTERPRETATION OF RESULTS 4.1 Airborne Radioiodine and Particulates The average annual gross beta11 concentrations in airborne particulates were similar at the indicator (0.044 +/-

0.018 picocuries per cubic meter (pCi/m3) for 2022) and control locations (0.043 +/- 0.018 pCi/m3 for 2022).

Mann-Kendall tests were conducted on the air particulate data for control and indicator locations. The data from 2009 to 2022 show a statistically significant increasing trend at a 95 percent confidence level; however, because this trend is observed with the control and indicator samples, the trend is not due to plant impact.

The results are graphed below in Figure 4.1-1.

Airborn e Particulate Annual Average Gross Beta

--..- Comro I ---+--- Indicators Figure 4.1-1: Graph of Historical Airborne Particulate Gross Beta 11 Gross beta is a measurement of all beta activity present, regardless of specific radionuclide source. Beta particles are physically identical to electrons, but are differentiated by their source (beta particles are created in the nucleus during certain types of nuclear transformations, whereas electrons come from the electron cloud surrounding the nucleus). Beta particles can have various states of energy.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Figure 4.1-2 shows the average indicator gross beta from the four indicator locations (Air Station locations M-2, M-3, M-4, M-5) versus the control location (Air Station M-1) in 2022. The error bar represents the statistical uncertainty, as 1.96 sigma () (95% confidence), associated with each measurement for a given sample collection date. Despite the variability of gross beta activity in airborne particulates, the average results from the indicator locations were similar to the results from the control location.

Airborn e J:larticulat.e 1

Gr,o ss Beta

_,._ Coolrol - . - ln<liC3LOr 0.16 0.14

(')

E 0.12 0

8 0.1 ro

--1,-J I])

0.08 ID a')

V) 0.06

~

e 0.04 0.02 0

,'>~ ~11<:- ~'ti~ ~$'-'t;, I,# ~4- 'Ytq,_, (S'I ~~'\ ;>$_ ").->~ ,,")::,,,fd:>v~~ ,r,->~,?-..f"e:,ef~ ~eq pJ" 9¢- .;_Po.!;. "K"o4 d"c,fj0c,'fl'~

... <,j"" "!,OJ! .zy 'l,fef" ~ "I,"<$ Qf .r:,,,"i " 'l-"" it,, .._'IJ I¥ ~ ,">i ~ (;;(" ~ ~ ,,,.,, ~ OJ! ~ ~ 'b"'

Sampfe Collection Date Figure 4.1-2: Graph of 2022 Average Airborne Particulate Gross Beta for Indicator and Control Locations Mixing of the upper and lower atmospheres can transport suspended particles and beryllium-712 from the upper atmosphere to the lower atmosphere, which can increase the airborne particulate gross beta in the lower atmosphere. Gamma spectroscopic analysis of quarterly composites of air particulate filters yielded similar results for indicator and control locations. Beryllium-7 was detected in all samples, with an average activity of 0.081 +/- 0.025 pCi/m3 for the control locations, and 0.082 +/- 0.026 pCi/m3 for the indicator locations.

All other gamma-emitting isotopes were below their respective LLD limits.

The weekly levels of airborne radioiodine-131 were below the LLD for the airborne radioiodine cartridge samples analyzed. There was no indication of an emission of radioiodine from MNGP.

12 Beryllium-7 can be created in the upper atmosphere by cosmic radiation and solar flares (Arnold & Al-Salih, 1955).

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 4.2 Drinking Water Tritium activity, gamma isotopic, and gross beta results were measured below the detection limit for all samples. Gross beta averages are shown on Figure 4.2-1. There was no indication of an effect from MNGP.

Because each measurement was below its respective LLD value, the annual dose for drinking water was assumed to be less than 1 mrem/year, and therefore iodine-131 analyses were not conducted in 2022 per ODCM Revision 26 (ODCM 07.01).

Historical Drinking Water Gross Beta (pCi/L)

';J 3.5 0

..9, 3.0 2

~ 2.5 e

(/)

(.')

2.0 a, 1.5 0) 1 ro 1.0

~ 0.5

<( 0.0 ' - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Years Figure 4.2-1: Graph of Historical Gross Beta for Drinking Water Sample 4.3 River Water River water was analyzed from samples both upstream and downstream of MNGP. Tritium activity was measured below the detection limit for all samples. The gamma isotopic results were all below detection limits.

4.4 Groundwater Tritium and gamma isotopic results were below the detection limit for all samples taken. The data for 2022 were consistent with the previous years results and no MNGP operational effects were indicated.

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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 4.5 Broadleaf Vegetation Vegetation samples were collected during the growing season of June, July, August, and September 2022.

Gamma isotopic and iodine-131 concentrations were measured below the detection limit in all samples.

These samples are required when milk samples are not available.

4.6 Food Products Corn and potato samples were not required for 2022. There were no crops within five miles (mi) of MNGP irrigated using water from the Mississippi River, and MNGP did not discharge radioactive liquid effluents.

4.7 Fish Fish were analyzed in 2022, including two fish species collected from upstream locations and two collected from downstream locations in June and September. Two species of fish, shorthead redhorse and smallmouth bass, were collected from each location. Gamma spectroscopy was performed on the edible portion of the fish. Only potassium-40, which is a common radioisotope found in nature and would not be associated with MNGP activities, was found with an average of 3.10 +/- 0.42 picocuries per gram (pCi/g) wet weight for the four upstream samples and 3.43 +/- 0.13 pCi/g wet weight for the four downstream samples.

These results are consistent with historical results. Other gamma-emitting isotopes remained below detection limits. There were no gamma emitting radionuclides attributable to MNGP operations identified in any of the 2022 fish samples.

Photo Credit: Darin Jensen, Senior Design Engineer, MNGP Canada Goose and Goslings Crossing Near an MNGP Radiological Environmental Sampling Point arcadis.com 27

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 4.8 Shoreline Sediment Shoreline sediments were collected from three locations: upstream, downstream, and downstream-recreational. Similar levels of activity have been observed since 1996 (see Figure 4.8-1) and are indicative of the influence of fallout deposition from above ground nuclear weapons testing. Levels of cesium-137 in sediments are observed to fluctuate as silt distributions shift due to natural erosion and transport processes.

Naturally occurring beryllium-7 and potassium-40 were also detected. There was no indication of a MNGP effect.

River Sediment Annual Average Cs-137 0.5 -+- 1,1-8 (Control) -+- M-9 -+- M-15 g> 0.45 0

.3, 0.4

(") 0.35

~

()' 0.3 a, 0.25 0)

~ 0.2

£ 0.15

~ 0.1

<( 0.05 0 .1,-,.....,.....,.,

<0r-...<0cnc - NM ~ ~ ~ r-,.. <O ~ 0 N M ~ ~ CO r-,.. <O ~

S: S: S: S:

8N 8N 8N 8N ~ ~ ~ ~ ~ ~ re ~ re re ~ re re ~ re re Years Figure 4.8-1: Graph of Historical Cesium-137 in River Sediment arcadis.com 28

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 4.9 Direct Gamma Radiation 4.9.1 Environmental TLD Direct gamma radiation was measured in the general area of the Site boundary, at the inner ring, at an outer ring 4 to 5 miles from the Plant, at special interest areas, and at four control locations using TLDs. On average, the quarterly TLD measurements (where one standard [std] quarter is a 91-day period) were similar for both inner and outer rings, at 14.5 and 14.1 millirem (mrem)/standard quarter (std quarter),

respectively. The mean for special interest locations was 14.4 mrem/std quarter and the mean for the control locations was 13.6 mrem/std quarter. Figure 4.9.1-1 shows the average measured dose from each std quarter. The error bars represent the statistical uncertainty associated with each average measurement.

TLD Results 2022 (mrem/std quarter)

........ c ontrol __ ,nner Ring ....... outer Ring -+-Special Interest 20 C 18 Q) ai:::J 1s i t fJ

-0

~

14 12 t t a> 10

~

_§, 8 f

~

0 6

<( 4 2

0 01 02 03 04 Sample Collection Date (2022)

Figure 4.9.1-1: Graph of Direct Gamma Radiation Measurements arcadis.com 29

2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Dose rates measured at the inner and outer ring locations in 2022 were similar to those observed from 1999 through 2021 and are shown in Figure 4.9.1-2. No MNGP effect on ambient gamma radiation is indicated.

Annual Average Historical TLD (mrem/std quarter)

~

__,._ Control -+- Inner Ring --+- Outer Ring t'. 20

~

r:::r 18

-0

~

(/) 16 E 14

.s

~

12

?;-

s:
10 0
<{ 8

O> 6 co
~
4
i 2 m:::)
C 0 C 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
<{
Years Figure 4.9.1-2: Graph of Historical Direct Gamma Measurements 4.9.2 ISFSI TLD Gamma and Neutron TLDs are located around the Independent Spent Fuel Storage Installation (ISFSI) to monitor direct radiation from stored fuel for trending purposes. The ISFSI TLDs are not considered true REMP TLDs and are not representative of the dose to members of the public. Results for monitoring are included in Section 10.
No additional spent fuel casks were moved to the ISFSI in 2022. Annual data trends at and in the vicinity of the ISFSI are consistent with expectations. There were no detectable dose rate increases observed at the Site boundary TLDs in 2022.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 5 LAND USE CENSUS 5.1 Purpose The Land Use Census identifies the pathways (or routes) by which radioactive material may reach the general populations near commercial nuclear generating stations. This is accomplished by completing studies each year that identify how the surrounding lands are used by the population. A comprehensive census of the use of the land within a five-mile distance of the Plant is completed during the growing season each year. This information is used for dose assessment and to identify changes to the stations sampled and the type of samples. Therefore, the purpose of the Land Use Census is to ensure the REMP is current based on human activity near MNGP, as well as to provide data for the calculation of estimated radiation exposure.
Photo Credit: Darin Jensen, Senior Design Engineer, MNGP Woodchuck Near an MNGP Radiological Environmental Sampling Point arcadis.com 31
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT The pathways evaluated are:
Ingestion Pathway - Results from eating food crops that may have radioactive materials deposited on them or may have taken up radioactive materials from the soil or atmosphere. Another potential pathway is through drinking milk or eating cheese from local cows or goats. The vegetation used to feed these animals may include radioactive material due to deposition or uptake from soil and the radioactivity transferred to the milk. If milk animals are not present, vegetation is collected in lieu of milk.
Direct Radiation Exposure Pathway - Results from deposition of radioactive materials on the ground or from passage of these radioactive materials in the air.
Inhalation Pathway - Results from breathing radioactive materials transported in the air.
5.2 Methodology The following must be identified within a five-mile radius of the Plant for each of the sixteen meteorological sectors (i.e., compass heading) for potential wind direction; for example, North-Northeast (NNE):
The nearest resident The nearest garden of greater than 500 square feet (ft2) producing broadleaf vegetables ("Garden")
The nearest animal used for meat consumption ("Meat")
The nearest milk-producing animal ("Milk")
The 2022 survey was performed using door-to-door surveys and visual observations while driving; additionally, inputs from the 2021 field data forms were used to evaluate changes to the land use. Google Earth Pro satellite imagery and the Homeland Security Emergency Management Monticello Basemap were used in determining changes in land use. Data were collected using a combination of the Spyglass App and Google Earth Pro, using a universal serial bus (USB) global positioning system (GPS) receiver. Google Earth Pro was used to determine receptor location distances and sectors; these results were used in determining dispersion parameters for dose calculations. Distance, direction, and dose pathway information is used to determine if any sampling locations need to be changed in the REMP sampling program and for determining Critical Receptor data.
5.3 2022 Land Use Census The 2022 Land Use Census was conducted between September 1st, 2022 and September 22nd, 2022, by the REMP Program Owner in accordance with MNGPs Chemistry Manual, Procedure I.05.41, Annual Land Use Census and Critical Receptor Identification (MNGP, n.d.).
There were no sectors that had an increase in the nearest garden D/Q of greater than 20 percent compared to 2021.13 The highest D/Q garden for 2022 remains in sector SSE at 1.21 miles from MNGP.
13 According to the 2021 Land Use Census, there was a new garden identified in the SSE sector that would've increased the D/Q for that sector above 20%; however, the garden was below the required threshold of 500 sq ft required. The garden has since shifted to a decorative garden. The majority of new receptors identified this year were new gardens; however, zero of the new gardens were the highest D/Q of their respective sector.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT In 2022, there was one sector where the highest Meat Animal D/Q values increased by 20 percent. Pigs were identified at 3.43 mi away from the plant in the NW (Q) sector, where animals had not previously been identified.
There were no sectors in which the highest D/Q values for the nearest resident increased by more than 20 percent in 2022. The highest D/Q resident remains at 0.99 miles from the Plant in the SSE sector.
In 2019 a new Milk location was located 3.25 miles in the NNE Photo Credit: Matt Mcclannahan, Senior Chemist, MNGP sector. The animal is infrequently milked and only provides enough Pigs identified 3.43 miles away from the plant for the family usage. The owner indicated that the cow had birthed a calf that will eventually be milked as well. There is also a beef cow at the location. Due to the relativity low deposition, the calculated dose at this location is lower than the vegetation sample locations. Milk samples are required for three locations within 3 miles or three locations where doses are calculated to be greater than 1 mrem/year (ODCM 07.01). The identified Milk animal is greater than 3 miles from the site, and the dose from all pathways at that location is 0.0146 mrem/year to the infant thyroid. Thus, vegetation sampling was performed in lieu of milk sampling.
There are no crops being irrigated from the Mississippi River within five miles downstream of the Plant, based upon the most recent Water Use Resources Permit Index Report from the Minnesota Department of Natural Resources. The nearest downstream drinking water supplies drawn from the Mississippi River remain St. Paul and Minneapolis water supplies as currently documented in the ODCM and Updated Final Safety Analysis Report.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT The highest D/Q location for each pathway is described in Table 5.3-1.
Table 5.3-1: Summary of Highest Location for Each Pathway in 2022 Pathway Sector Distance (mi) D/Q Resident SSE 0.99 1.40E-08 Meat WSW 1.78 9.60E-10 Meat + Garden W 1.82 6.90E-10 Garden SSE 1.21 6.70E-09 Milk1 NNE 3.24 3.90E-10 Crops - - -
Notes:
1 Vegetation performed in lieu of Milk sampling.
Doses due to ground plane, inhalation, and ingestion of vegetables and meat, were calculated for the highest D/Q Resident, Meat, Garden, and combined Meat and Garden locations identified in the 2022 Land Use Census. In accordance with the ODCM, the long- and short-duration gaseous releases from the Reactor Building Vent and the Off-gas Stack for the previous calendar year were used as the source terms.
Doses were calculated using the RADEAS computer program with the 2021 Annual Effluent Data report source term as input. This resulted in identifying the same sector, distance, and pathway as compared to last year's critical receptor. The organ with the highest dose was bone, consistent with 2021. The location, comprising a residence with a garden, is 1.20 miles away from the Plant located in the SSE sector (designated GH). The pathway identified is the combination of ground plane, inhalation, and vegetable ingestion. For the purposes of compliance with 10 CFR 50 Appendix I, the critical receptor is defined as a child at this location with dose calculated to the bone. The dose for this receptor is estimated at 0.0245 mrem/year.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 6 QUALITY ASSURANCE 6.1 Sample Collection MNGP personnel performed the environmental sample collections as specified by approved sample collection procedures.
6.2 Sample Analysis General Engineering Laboratories, LLC (GEL) performed the environmental sample analyses as specified by approved analysis procedures. GEL is located in Charleston, South Carolina.
6.3 Dosimetry Analysis Environmental Dosimetry Company (EDC) works in conjunction with Stanford Dosimetry to perform the environmental dosimetry measurements as specified by approved dosimetry analysis procedures. The Environmental TLD program at EDC provides Panasonic TLD badges containing calcium sulfate (CaSO4) phosphor elements for posting in the field. The raw TLD results are corrected for individual element sensitivity and reader sensitivity as determined by the quality control results. Control dosimeters are used to determine the background radiation exposure during the shipment and serve to evaluate transit exposures. The transit exposures are subtracted from the field dosimeters. Since the measured signal fades from the time of exposure to analysis, the fade of the thermoluminescent response is corrected.
6.4 Laboratory Equipment Quality Assurance 6.4.1 Daily Quality Control GEL has an internal QA program which monitors each type of instrumentation for reliability and accuracy.
Daily quality control checks ensure that instruments are in proper working order, and these checks are used to monitor instrument performance.
6.4.2 Calibration Verification National Institute of Standards and Technology (NIST) standards that represent counting geometries are analyzed as unknowns at various frequencies, ranging from weekly to annually, to verify that efficiency calibrations are valid. The frequency is dependent upon instrument use and performance. Investigations are performed and documented should calibration verification data fall outside of the acceptable limits.
6.5 General Engineering Laboratory, LLC GEL participated in various QA programs for inter-laboratory, intra-laboratory, third-party cross check programs, and a number of proficiency testing programs during 2022. A summary of the GEL QA program results for the sample media types sent to GEL during 2022 is documented in Appendix A.
The standard operating procedures used by GEL are approved methods. Copies of GELs accreditations and certifications are available on their website, www.gel.com.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 6.6 Environmental Dosimetry Company EDC participates in an internal performance acceptance criteria and a quarterly independent testing TLD intercomparison program. In 2022, 100 percent of the individual dosimeters passed the performance criteria. A summary of the 2022 EDC Annual Quality Assurance Status Report is documented in Appendix B.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 7 ENVIRONMENTAL SAMPLING MODIFICATIONS 7.1 Program Modifications There were no programmatic changes to environmental sampling in 2022.
7.2 Change of Sampling Procedures There were no changes to sampling procedures in 2022.
7.3 Change of Analysis Procedures There were no changes to the analysis procedures in 2022.
7.4 Sample Deviations and Unavailable Analyses Table 7.4-1 lists the deviations from the required REMP sample collection in 2022. Despite these sample deviations, 99.4 percent of the required samples were successfully obtained and analyzed.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 7.4-1: Sample Deviations and Unavailable Analyses Reason for Collection not Sample Condition Analysis Location Date or conducting Corrective Action Type Report I I I Period I REMP as required Unsafe I I Composite -
condition for Surface Gamma Gamma: Jan, Sample obtained M-8C sampling due 501000059732 Water Isotopic Feb, Dec when water thawed to frozen river 20221 surface Air sampler was found to not be running. Replaced pump and Gamma Partial sample verified functioning.
Airborne Isotopic, M-1 May 2022 was collected Results are still 501000063192 Particulate Iodine-131, but is reported in Section Gross Beta considered a 10.
missed sample.
Sampler likely struck by Updated Direct Gamma farming DAR 603000007001 M09B Q3 501000067454 Radiation Dose equipment and with this CAP dislodged from number for tracking post.
Air sampler was found to not be running. Replaced pump and Gamma Partial sample verified functioning.
Airborne Isotopic, December M-2 was collected Results are still 501000069541 Particulate Iodine-131, 2022 but is reported in Section Gross Beta considered a 10.
missed sample.
TLDs were in the same A second search will holder, which be performed when went missing. snow melts and the TLD Gamma M12A Q4 501000069800 Likely cause holder will be was snow reaffixed to prevent removal reoccurrence.
activities.
Notes:
1 January and February samples could not be collected, but samples were collected in March. The quarterly composite for tritium therefore only includes March. For the quarter 4 composite sample, data was only collected for October and November.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 7.5 Analytical Deviations The ODCM 07.01 (ODCM 07.01) Table 3 LLD values for the parent-daughter isotopic pair barium-140/lanthanum-140 are 60 pCi/L and 15 pCi/L, respectively (see Table 3.4-2). Of the 49 groundwater, surface water, and drinking water samples collected in 2022, the LLD was not satisfied in six of the barium-140/lanthanum-140 samples (12%). In each sample, the MDC was higher than the LLD. The cause of the deviation was largely due to the time period between sample analysis and sample collection. A delay in the analysis of the sample by the laboratory, coupled with short radiochemical half-life, caused the deviations.
Table 7.5-1 below details the analytical deviations.
Table 7.5-1: Analytical Deviations Minimum ODCM 07.01 Detectible Collect Analysis Result Table 3 Location Isotope Concentration Date/Time Date/Time (pCi/L) Required (MDC)
LLD (pCi/L)
(pCi/L) 7/27/2022 9/20/2022 La-140 13.2 U 15 60.9 M-8 Upstream 12:00 9:18 Ba-140 -62.1 U 60 167 of Plant 11/23/2022 1/10/2023 La-140 -2.1 U 15 17.3 11:30 12:21 1/26/2022 3/11/2022 La-140 -2.65 U 15 21.2 13:11 16:03 2/23/2022 4/5/2022 La-140 -6.59 U 15 22.6 M-9 11:39 13:01 Ba-140 33.7 U 60 67 Downstream of 4/27/2022 6/8/2022 Plant La-140 -1.21 U 15 18.1 14:45 10:18 7/27/2022 9/19/2022 La-140 -2.72 U 15 46.8 12:00 13:24 Ba-140 -8.21 U 60 135 Notes:
U qualifier indicates that the analyte was analyzed for, but not detected above the MDC.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 8 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM -
SUMMARY
OF RESULTS This section presents a summary of MNGPs REMP sampling and monitoring results for the 2022 period for airborne particulates, airborne radioiodine, direct radiation, and measurable radioactivity in milk, broadleaf vegetation, river water, aquatic invertebrates, shoreline sediments, groundwater, drinking water, and fish. In all, there were no reported non-routine measurements.
8.1 Radiological Environmental Monitoring Program Data Summary Table 8.1-1 below presents the summary of MNGPs REMP sampling and monitoring results for the 2022 period.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 8.1-1: Radiological Environmental Monitoring Program Summary Name of Facility: Monticello Nuclear Generating Plant Docket No: 50-263 Location of Facility: Wright, Minnesota Reporting Period January - December 2022 Table 8.1-1: Radiological Environmental Monitoring Program Summary (Continued)
Type, Control Location with Highest Annual Mean1 (f)2 Total Mean Number of ODCM Indicator Mean1 Analyses Table 3 Number of Medium or Pathway Sampled performed Lower Name Mean 1 Nonroutine (Units) Limit of Reported Detection (f)2 (f)2 Range1 Measurements (e.g. I-131, (LLD) Distance and 400) 1 Direction Range Range1 Airborne Particulates Gross Beta 0.01 0.044 (208/208) M-5, Air Station 0.046 (52/52) 0.043 (52/52) 0 (pCi/m3) (260) 0.009 - 0.126 2.6 m @ 134/SE 0.016 - 0.126 0.013 - 0.114 Gamma 0 (20)
Be-73 - 0.082 (16/16) M-5, Air Station 0.085 (4/4) 0.081 (4/4) 0.048 - 0.127 2.6 m @ 134/SE 0.051 - 0.121 0.055 - 0.109 Mn-54 - <LLD - - <LLD Co-58 - <LLD - - <LLD Co-60 - <LLD - - <LLD Zn-65 - <LLD - - <LLD Zr-Nb-95 - <LLD - - <LLD Ru-103 - <LLD - - <LLD Ru-106 - <LLD - - <LLD Cs-134 0.05 <LLD - - <LLD Cs-137 0.06 <LLD - - <LLD Ba-La-140 - <LLD - - <LLD Ce-141 - <LLD - - <LLD Ce-144 - <LLD - - <LLD Airborne Radioiodine I-131 0.07 <LLD - - <LLD 0 (pCi/m3) (260)
Broadleaf Vegetation Gamma 0 (pCi/kg-wet) (12)
Mn-54 - <LLD - - <LLD Fe-59 - <LLD - - <LLD Co-58 - <LLD - - <LLD Co-60 - <LLD - - <LLD Zn-65 - <LLD - - <LLD Zr-Nb-95 - <LLD - - <LLD I-131 60 <LLD - - <LLD Cs-134 60 <LLD - - <LLD Cs-137 80 <LLD - - <LLD Milk I-131 1 N/A N/A N/A N/A 0 (pCi/L) (0)
Gamma N/A N/A N/A N/A N/A 0 (0) arcadis.com 41
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 8.1-1: Radiological Environmental Monitoring Program Summary (Continued)
Type, Control Location with Highest Annual Mean1 (f)2 Total Mean Number of ODCM Indicator Mean1 Analyses Table 3 Number of Medium or Pathway Sampled performed Lower Name Mean 1 Nonroutine (Units) Limit of Reported Detection (f)2 (f)2 Range1 Measurements (e.g. I-131, (LLD) Distance and 400) 1 Direction Range Range1 Fish Gamma 0 (pCi/kg-wet) (8)
K-403 - 3427 (4/4) M-9 Downstream 3527 (4/4) 3097 (4/4) 3240 - 3520 of Plant 3240 - 3520 2740 - 3590 Mn-54 130 <LLD - - <LLD Fe-59 260 <LLD - - <LLD Co-58 130 <LLD - - <LLD Co-60 130 <LLD - - <LLD Zn-65 260 <LLD - - <LLD Zr-Nb-95 - <LLD - - <LLD Cs-134 130 <LLD - - <LLD Cs-137 150 <LLD - - <LLD Ba-La-140 - <LLD - - <LLD Ce-144 - <LLD - - <LLD Shoreline Sediments Gamma 0 (pCi/kg-dry) (6)
Be-73 - 1290 (2/4) M-9 2230 (1/2) 477 (1/2) 351 - 2230 Downstream of 2230 - 2230 477 - 477 Plant K-403 - 11160 (4/4) 11420 (2/2) 10150 (2/2) 9740 - 13100 M-15 9740 - 13100 10100 - 10200 Montissippi Park Mn-54 - <LLD - <LLD Fe-59 - <LLD - - <LLD Co-58 - <LLD - - <LLD Co-60 - <LLD - - <LLD Zn-65 - <LLD - - <LLD Zr-Nb-95 - <LLD - - <LLD Cs-134 150 <LLD - - <LLD Cs-137 180 <LLD - <LLD
<LLD Ba-La-140 - <LLD - <LLD Ce-144 - <LLD - -
Drinking Water Gross Beta 4 <LLD - - None 0 (pCi/L) (12) arcadis.com 42
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 8.1-1: Radiological Environmental Monitoring Program Summary (Continued)
Type, Control Location with Highest Annual Mean1 (f)2 Total Mean Number of ODCM Indicator Mean1 Analyses Table 3 Number of Medium or Pathway Sampled performed Lower Name Mean 1 Nonroutine (Units) Limit of Reported Detection (f)2 (f)2 Range1 Measurements (e.g. I-131, (LLD) Distance and 400) 1 Direction Range Range1 Drinking Water Gamma 0 (pCi/L) (12)
Mn-54 15 <LLD - - None
<LLD - -
Fe-59 30 <LLD - - None Co-58 15 <LLD - - None Co-60 15 <LLD - - None Zn-65 30 <LLD - - None Zr-Nb-95 154 <LLD - - None Cs-134 15 <LLD - - None Cs-137 18 <LLD6 - - None Ba-La-140 154 <LLD - None Ce-144 - None I-131 1 - - - None 0 (0)
Tritium 2000 <LLD - - None 0 (4)
Groundwater Gamma 0 (pCi/L) (16)
Mn-54 15 <LLD - - <LLD Fe-59 30 <LLD - - <LLD Co-58 15 <LLD - - <LLD Co-60 15 <LLD - - <LLD Zn-65 30 <LLD - - <LLD Zr-Nb-95 154 <LLD - - <LLD Cs-134 15 <LLD - - <LLD Cs-137 18 <LLD - - <LLD Ba-La-140 154 <LLD - - <LLD Ce-144 - <LLD - - <LLD I-1316 15 <LLD - - <LLD 0 (0)
Tritium 2000 <LLD - - <LLD 0 (4)
River Water Gamma 0 (pCi/L) (21)
Mn-54 15 <LLD - - <LLD Fe-59 30 <LLD - - <LLD Co-58 15 <LLD - - <LLD Co-60 15 <LLD - - <LLD Zn-65 30 <LLD - - <LLD Zr-Nb-95 154 <LLD - - <LLD Cs-134 15 <LLD - - <LLD Cs-137 18 <LLD - - <LLD Ba-La-140 154 <LLD - - <LLD Ce-144 - <LLD - - <LLD Tritium 2000 <LLD - - <LLD 0 (8) arcadis.com 43
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Table 8.1-1: Radiological Environmental Monitoring Program Summary (Continued)
Type, Control Location with Highest Annual Mean1 (f)2 Total Mean Number of ODCM Indicator Mean1 Analyses Table 3 Number of Medium or Pathway Sampled performed Lower Name Mean 1 Nonroutine (Units) Limit of Reported Detection (f)2 (f)2 Range1 Measurements (e.g. I-131, (LLD) Distance and 400) 1 Direction Range Range1 Direct Radiation: Gamma - N/A M03C 14.8 (4/4) 13.6 (16/16) 0 Control (16) 11.6 mi @ (13.1 - 16.3) (11.9 - 16.3) 130/SE (10 to 12 miles distant)
(mrem/91 days)
Direct Radiation: Gamma - 14.5 (55/55) M11A, 15.13 (4/4) 0 Inner Ring (55) (12.5 - 16.6) 0.4 mi @ (13.9 -16.3) 237/WSW (General Area at Site Boundary)
(mrem/91 days)
Direct Radiation: Gamma - 14.1 (63/63) M09B, 15.0 (4/4) 0 Outer Ring (63) (11.2 - 16.5) 4.7 mi @ 178/S (13.3 - 16.5)
(4-5 mi. distant) M11A, 15.0 (4/4)
(mrem/91 days) 0.4 mi @ (13.6 - 15.9) 237/WSW Direct Radiation: Gamma - 14.4 (36/36) M06S 15.4 (4/4) 0 Special Interest Areas (36) (12 - 17.1) 2.6 mi @ 134/SE (14.5 - 17.0)
(mrem/91 days)
Notes:
1 Mean and range are based upon detectible measurements only.
2 (f) Fraction of detectible measurements at a specific location.
3 Natural and not due to Plant influence.
4 The specified LLD applies to the daughter nuclide of an equilibrium mixture of the parent and daughter nuclides.
Per the BPT, the following values may be used for individual nuclide LLDs when equilibrium conditions are not met: 30 pCi/L for zirconium-95, 15 pCi/L for niobium-95, 60 pCi/L for barium-140, and 15 pCi/L for lanthanum-140.
5 If no drinking water pathway exists, a value of 15 pCi/L may be used.
6 Not required.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 9 ERRATA TO PREVIOUS REPORTS 9.1 Errata to the MNGP AREOR Included in this report are errata to the 2021 AREOR. During the 2022 NRC REMP Program Inspection, it was identified that there was a partial sample for air sampler M-1 for the week of August 18, 2021 through August 25, 2021. The air sampler was found not running when performing weekly filter collection and changeout. The partial sample was captured in Monticello QIM 501000055461 but not identified in the report. Any partial sample should be reported as a missed sample. The errata update the sample deviations described in Table 7.4-1 (page 37) and adds identifiers to the associated sample data tables noting partial samples (pages 48 through 52).
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 10 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS This section provides tabulated REMP monitoring results. Data below were analyzed by GEL. The results reported relate only to the items tested and to the samples as received by the laboratory. Copies of GELs accreditations and certificates can be found at www.gel.com. The table notes, matrix abbreviations, and laboratory qualifiers common to each of the GEL analytical results tables are provided below.
Notes
1. LLDs are a priori values.
2. MDCs are calculated a posteriori value.
3. Gamma spectroscopy analysis results are calculated from a measurement using only one gamma energy line.
4. Results with either no qualifier, an M, or an L are considered positive results. While a U, UI, or ND are negative.
Matrix Abbreviations AC Airborne Cartridge AP Airborne Particulate SE Sediment TA Aquatic Tissue TP Plant Tissue WG Groundwater WP Drinking Water WS Surface Water Qualifiers L Analyte present. Reported value may be biased low. Actual value is expected to be higher.
M M if above MDC and less than LLD.
M REMP Result >MDC/CL and <RDL ND Analyte concentration is not detected above the limits as defined as the U qualifier U Analyte was analyzed for, but not detected above the Minimum Detection Limit (MDL), Minimum Detectable Activity (MDA), MDC, or Limit of Detection (LOD)
UI Gamma Spectroscopy - uncertain identification; these results were evaluated and found to be false positives, unless otherwise noted X Lab specific qualifier - see notes from data tables for details.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 10.1 Detection of Activity It is often not possible to say for certain when net radioactivity is present in samples at environmental background levels due to natural variations in counting instrument backgrounds and other factors. The data below is reported as determined by the lab with uncertainties and all data has been included (even results with negative numbers). Results with U, UI, or ND qualifiers are considered not detected and results with L, M, or blank qualifiers are considered to be detected.
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT AIRBORNE CARTRIDGE: RADIOIODINE Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 1/4/2022 4.15E-05 +/- 1.52E-02 2.08E-03 +/- 8.95E-03 3.58E-03 +/- 1.22E-02 4.46E-03 +/- 1.25E-02 -2.36E-03 +/- 1.13E-02 U U U U U 1/12/2022 -2.09E-03 +/- 7.74E-03 -8.32E-05 +/- 6.63E-03 -5.07E-03 +/- 8.11E-03 -8.49E-03 +/- 1.09E-02 -3.37E-03 +/- 8.39E-03 U U U U U 1/19/2022 2.06E-03 +/- 8.28E-03 2.51E-03 +/- 7.81E-03 -2.63E-03 +/- 7.67E-03 -1.10E-03 +/- 1.40E-02 2.30E-03 +/- 6.86E-03 U U U U U 1/26/2022 2.43E-03 +/- 8.82E-03 4.65E-03 +/- 5.87E-03 -1.45E-03 +/- 8.41E-03 1.23E-03 +/- 8.93E-03 5.40E-03 +/- 9.28E-03 U U U U U 2/1/2022 1.01E-02 +/- 1.09E-02 2.41E-03 +/- 8.43E-03 -1.68E-03 +/- 1.13E-02 6.28E-03 +/- 9.27E-03 -2.28E-04 +/- 1.44E-02 U U U U U 2/9/2022 5.82E-04 +/- 4.09E-03 -3.26E-03 +/- 6.27E-03 1.01E-04 +/- 4.56E-03 -1.44E-03 +/- 4.99E-03 -9.74E-04 +/- 4.65E-03 U U U U U 2/15/2022 5.95E-03 +/- 1.33E-02 -8.08E-04 +/- 1.21E-02 -1.79E-05 +/- 8.00E-03 -5.82E-03 +/- 1.05E-02 2.50E-03 +/- 1.16E-02 U U U U U 2/23/2022 6.21E-03 +/- 1.07E-02 -4.37E-03 +/- 6.46E-03 6.39E-04 +/- 5.96E-03 2.38E-04 +/- 4.72E-03 3.49E-03 +/- 7.36E-03 U U U U U 3/1/2022 5.03E-03 +/- 6.30E-03 -1.73E-03 +/- 9.14E-03 4.26E-03 +/- 5.21E-03 2.12E-03 +/- 7.10E-03 -2.81E-03 +/- 6.21E-03 U U U U U 3/8/2022 9.01E-03 +/- 1.88E-02 -1.02E-02 +/- 1.53E-02 1.38E-03 +/- 1.57E-02 1.89E-02 +/- 2.86E-02 1.30E-02 +/- 1.65E-02 U U U U U 3/16/2022 1.68E-04 +/- 5.72E-03 1.88E-03 +/- 6.99E-03 5.27E-04 +/- 5.82E-03 -5.77E-03 +/- 7.86E-03 5.16E-03 +/- 6.84E-03 U U U U U 3/23/2022 6.88E-03 +/- 6.49E-03 -2.81E-03 +/- 8.18E-03 4.08E-04 +/- 6.55E-03 5.90E-03 +/- 8.33E-03 6.96E-03 +/- 8.12E-03 U U U U U 3/30/2022 2.34E-03 +/- 1.27E-02 1.30E-02 +/- 1.28E-02 -1.01E-02 +/- 1.28E-02 2.59E-03 +/- 1.00E-02 2.62E-03 +/- 1.21E-02 U U U U U 4/6/2022 4.88E-03 +/- 6.82E-03 1.06E-03 +/- 1.13E-02 5.76E-03 +/- 8.01E-03 -1.63E-03 +/- 1.15E-02 1.16E-02 +/- 8.66E-03 U U U U U 4/13/2022 6.86E-03 +/- 1.26E-02 9.05E-03 +/- 1.58E-02 1.23E-02 +/- 9.21E-03 8.43E-03 +/- 1.18E-02 9.57E-03 +/- 1.48E-02 U U UI U U 4/19/2022 3.73E-03 +/- 1.20E-02 -4.69E-03 +/- 1.50E-02 1.01E-02 +/- 1.87E-02 -5.95E-03 +/- 1.37E-02 -7.38E-03 +/- 9.35E-03 U U U U U 4/27/2022 3.47E-03 +/- 7.90E-03 1.72E-03 +/- 9.33E-03 2.77E-03 +/- 5.63E-03 8.95E-03 +/- 9.57E-03 1.65E-03 +/- 9.50E-03 U U U U U 5/4/2022 3.28E-04 +/- 1.55E-02 1.17E-02 +/- 1.48E-02 4.92E-03 +/- 1.07E-02 2.88E-03 +/- 9.42E-03 -1.02E-03 +/- 1.14E-02 U U U U U 5/11/2022 -1.51E-04 +/- 9.54E-03 5.38E-03 +/- 1.20E-02 2.24E-03 +/- 2.02E-02 3.93E-03 +/- 1.13E-02 -1.18E-03 +/- 1.24E-02 U* U U U U 5/18/2022 -9.32E-03 +/- 2.12E-02 -1.31E-03 +/- 1.21E-02 6.16E-04 +/- 8.44E-03 -8.49E-03 +/- 1.30E-02 3.70E-03 +/- 1.22E-02 U U U U U 5/25/2022 1.94E-03 +/- 1.14E-02 -7.39E-03 +/- 1.09E-02 -8.12E-03 +/- 1.69E-02 1.59E-04 +/- 8.75E-03 4.16E-03 +/- 1.46E-02 U U U U U 6/1/2022 -3.86E-03 +/- 1.58E-02 3.62E-03 +/- 1.67E-02 6.79E-04 +/- 1.62E-02 1.41E-02 +/- 2.71E-02 -1.80E-03 +/- 2.41E-02 U U U U U 6/8/2022 -7.89E-04 +/- 1.50E-02 -6.02E-03 +/- 1.29E-02 3.96E-03 +/- 1.28E-02 8.21E-03 +/- 1.13E-02 -4.55E-03 +/- 1.31E-02 U U U U U arcadis.com 48
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 6/15/2022 4.69E-03 +/- 1.71E-02 5.54E-03 +/- 7.35E-03 3.59E-03 +/- 7.57E-03 9.30E-04 +/- 1.02E-02 -2.96E-03 +/- 1.15E-02 U U U U U 6/22/2022 8.40E-03 +/- 1.44E-02 3.65E-03 +/- 1.21E-02 1.16E-03 +/- 1.01E-02 1.54E-03 +/- 1.17E-02 3.87E-03 +/- 1.45E-02 U U U U U 6/29/2022 1.35E-03 +/- 1.25E-02 5.35E-03 +/- 9.90E-03 1.35E-03 +/- 1.12E-02 -1.93E-03 +/- 1.44E-02 -4.21E-03 +/- 1.13E-02 U U U U U 7/6/2022 3.53E-03 +/- 2.11E-02 7.01E-03 +/- 1.94E-02 8.20E-03 +/- 1.45E-02 -5.09E-03 +/- 1.83E-02 9.17E-03 +/- 2.89E-02 U U U U U 7/13/2022 -1.24E-01 +/- 1.80E-02 8.39E-04 +/- 1.34E-02 7.22E-04 +/- 1.11E-02 1.43E-03 +/- 9.60E-03 6.03E-03 +/- 1.05E-02 U U U U U 7/20/2022 -3.10E-03 +/- 2.21E-02 0.00E+00 +/- 1.74E-02 -5.31E-03 +/- 2.19E-02 4.72E-04 +/- 1.58E-02 6.52E-03 +/- 2.61E-02 U U U U U 7/27/2022 -6.03E-04 +/- 1.07E-02 -4.87E-03 +/- 1.13E-02 1.99E-03 +/- 1.67E-02 1.70E-04 +/- 8.89E-03 8.77E-03 +/- 1.33E-02 U U U U U 8/2/2022 1.81E-03 +/- 8.50E-03 -5.87E-03 +/- 1.00E-02 -1.01E-02 +/- 1.08E-02 -2.03E-02 +/- 1.77E-02 -2.66E-03 +/- 1.35E-02 U U U U U 8/10/2022 2.32E-03 +/- 1.16E-02 -3.55E-03 +/- 1.12E-02 -7.11E-03 +/- 1.18E-02 3.42E-03 +/- 1.63E-02 2.55E-02 +/- 2.76E-02 U U U U UI 8/17/2022 6.93E-03 +/- 1.96E-02 3.19E-03 +/- 1.28E-02 -6.16E-03 +/- 1.63E-02 1.03E-02 +/- 2.22E-02 3.68E-02 +/- 2.55E-02 U U U U U 8/24/2022 1.12E-02 +/- 7.55E-03 9.65E-04 +/- 8.97E-03 2.62E-03 +/- 8.26E-03 -4.74E-03 +/- 5.88E-03 4.90E-04 +/- 7.46E-03 U U U U U 8/31/2022 9.44E-03 +/- 1.01E-02 -4.70E-04 +/- 9.42E-03 -1.80E-03 +/- 9.29E-03 4.37E-03 +/- 9.12E-03 5.25E-03 +/- 9.63E-03 U U U U U 9/7/2022 8.37E-03 +/- 1.54E-02 -5.57E-03 +/- 1.42E-02 2.31E-04 +/- 1.60E-02 9.98E-04 +/- 1.45E-02 8.52E-03 +/- 1.30E-02 U U U U U 9/14/2022 6.80E-03 +/- 9.37E-03 8.41E-03 +/- 1.04E-02 -1.42E-03 +/- 8.76E-03 1.38E-03 +/- 7.30E-03 -2.11E-03 +/- 7.80E-03 U U U U U 9/21/2022 1.40E-03 +/- 1.46E-02 9.29E-03 +/- 1.43E-02 8.20E-03 +/- 1.50E-02 -2.77E-03 +/- 1.45E-02 -1.27E-02 +/- 1.60E-02 U U U U U 9/27/2022 1.41E-02 +/- 3.26E-02 3.33E-02 +/- 3.02E-02 1.03E-02 +/- 2.44E-02 2.56E-03 +/- 2.53E-02 6.94E-03 +/- 2.21E-02 U U U U U 10/5/2022 5.67E-03 +/- 5.92E-03 -2.45E-03 +/- 8.27E-03 7.31E-03 +/- 9.88E-03 -2.79E-03 +/- 1.02E-02 -8.38E-03 +/- 8.41E-03 U U U U U 10/12/2022 -3.26E-03 +/- 1.15E-02 -1.22E-02 +/- 1.78E-02 -5.22E-04 +/- 1.60E-02 1.37E-02 +/- 1.37E-02 5.64E-03 +/- 1.53E-02 U U U U U 10/19/2022 3.02E-03 +/- 2.05E-02 -3.05E-03 +/- 2.58E-02 1.34E-02 +/- 1.61E-02 -9.36E-04 +/- 1.61E-02 8.72E-03 +/- 2.55E-02 U U U U U 10/26/2022 1.81E-02 +/- 2.15E-02 6.23E-03 +/- 1.07E-02 1.39E-03 +/- 7.32E-03 2.04E-03 +/- 8.80E-03 5.28E-03 +/- 7.63E-03 U U U U U 11/2/2022 -3.50E-03 +/- 1.03E-02 7.76E-03 +/- 1.39E-02 -5.28E-03 +/- 9.13E-03 1.49E-03 +/- 1.21E-02 7.81E-03 +/- 8.87E-03 U U U U U 11/10/2022 -5.58E-03 +/- 5.77E-03 -2.21E-03 +/- 5.84E-03 -4.50E-03 +/- 6.94E-03 4.49E-03 +/- 4.54E-03 -1.73E-03 +/- 5.94E-03 U U U U U 11/16/2022 6.29E-03 +/- 1.48E-02 1.04E-02 +/- 1.52E-02 9.75E-03 +/- 1.38E-02 9.44E-04 +/- 1.40E-02 2.54E-02 +/- 2.32E-02 U U U U UI 11/23/2022 9.05E-03 +/- 1.29E-02 -5.19E-03 +/- 8.19E-03 -1.69E-03 +/- 8.25E-03 -4.25E-03 +/- 8.66E-03 -3.17E-03 +/- 9.11E-03 U U U U U arcadis.com 49
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 11/30/2022 -9.83E-04 +/- 1.03E-02 -1.89E-03 +/- 1.02E-02 -1.24E-04 +/- 9.80E-03 3.55E-03 +/- 1.68E-02 -1.09E-02 +/- 1.42E-02 U U U U U 12/7/2022 -9.00E-03 +/- 1.29E-02 6.79E-03 +/- 1.34E-02 4.96E-03 +/- 1.04E-02 -2.50E-03 +/- 8.76E-03 4.95E-03 +/- 7.49E-03 U U U U U 12/13/2022 -2.87E-02 +/- 3.34E-02 -1.18E-02 +/- 3.69E-02 3.02E-02 +/- 3.30E-02 -3.13E-02 +/- 4.53E-02 -2.04E-02 +/- 4.08E-02 U U U U U 12/20/2022 8.57E-03 +/- 1.46E-02 5.96E-03 +/- 1.18E-02 -1.14E-02 +/- 1.64E-02 -8.00E-03 +/- 1.77E-02 -6.24E-03 +/- 1.81E-02 U U U U U 12/27/2022 -1.37E-03 +/- 9.58E-03 -5.85E-03 +/- 1.29E-02 2.55E-03 +/- 9.06E-03 -1.50E-03 +/- 7.98E-03 -9.89E-04 +/- 9.43E-03 U U* U U U Note:
The M-1 air sampler (5/11/2022 sample date) and M-2 air sampler (12/27/2022 sample date) were found to not be running on the indicated sample collection dates. Partial samples were collected. Although results are provided, these are considered missed samples (Condition Reports 501000063192 and 501000069541, respectively).
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT AIRBORNE PARTICULATES: GROSS BETA Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 01/04/2022 0.114 +/- 0.008 0.105 +/- 0.008 0.108 +/- 0.008 0.115 +/- 0.008 0.126 +/- 0.009 01/12/2022 0.061 +/- 0.006 0.077 +/- 0.006 0.058 +/- 0.006 0.068 +/- 0.006 0.063 +/- 0.006 01/19/2022 0.065 +/- 0.006 0.059 +/- 0.006 0.064 +/- 0.007 0.067 +/- 0.007 0.062 +/- 0.006 01/26/2022 0.071 +/- 0.007 0.066 +/- 0.006 0.061 +/- 0.006 0.071 +/- 0.007 0.073 +/- 0.007 02/01/2022 0.064 +/- 0.006 0.070 +/- 0.007 0.060 +/- 0.007 0.054 +/- 0.006 0.063 +/- 0.007 02/09/2022 0.061 +/- 0.005 0.067 +/- 0.006 0.060 +/- 0.005 0.068 +/- 0.006 0.072 +/- 0.006 02/15/2022 0.053 +/- 0.007 0.053 +/- 0.006 0.049 +/- 0.006 0.041 +/- 0.005 0.059 +/- 0.007 02/23/2022 0.058 +/- 0.005 0.065 +/- 0.006 0.060 +/- 0.005 0.062 +/- 0.005 0.062 +/- 0.006 03/01/2022 0.072 +/- 0.007 0.085 +/- 0.008 0.073 +/- 0.007 0.074 +/- 0.007 0.078 +/- 0.008 03/08/2022 0.051 +/- 0.005 0.046 +/- 0.005 0.052 +/- 0.006 0.058 +/- 0.007 0.057 +/- 0.006 03/16/2022 0.037 +/- 0.004 0.047 +/- 0.005 0.038 +/- 0.004 0.049 +/- 0.006 0.046 +/- 0.005 03/23/2022 0.028 +/- 0.004 0.032 +/- 0.005 0.028 +/- 0.004 0.038 +/- 0.006 0.031 +/- 0.005 03/30/2022 0.028 +/- 0.004 0.031 +/- 0.005 0.027 +/- 0.004 0.036 +/- 0.005 0.030 +/- 0.005 04/06/2022 0.023 +/- 0.004 0.029 +/- 0.005 0.023 +/- 0.004 0.032 +/- 0.005 0.031 +/- 0.005 04/13/2022 0.017 +/- 0.003 0.020 +/- 0.004 0.020 +/- 0.004 0.028 +/- 0.005 0.022 +/- 0.004 04/19/2022 0.025 +/- 0.004 0.032 +/- 0.005 0.028 +/- 0.005 0.042 +/- 0.006 0.029 +/- 0.005 04/27/2022 0.025 +/- 0.004 0.030 +/- 0.004 0.024 +/- 0.004 0.038 +/- 0.005 0.028 +/- 0.004 05/04/2022 0.031 +/- 0.006 0.037 +/- 0.006 0.023 +/- 0.004 0.036 +/- 0.006 0.041 +/- 0.006 05/11/2022 0.031 +/- 0.005* 0.049 +/- 0.006 0.046 +/- 0.006 0.046 +/- 0.006 0.041 +/- 0.006 05/18/2022 0.047 +/- 0.009 0.039 +/- 0.006 0.034 +/- 0.005 0.040 +/- 0.006 0.035 +/- 0.005 05/25/2022 0.036 +/- 0.006 0.036 +/- 0.006 0.035 +/- 0.006 0.038 +/- 0.006 0.039 +/- 0.006 06/01/2022 0.026 +/- 0.005 0.030 +/- 0.004 0.023 +/- 0.004 0.028 +/- 0.005 0.031 +/- 0.005 06/08/2022 0.036 +/- 0.005 0.034 +/- 0.005 0.028 +/- 0.004 0.032 +/- 0.005 0.040 +/- 0.005 06/15/2022 0.044 +/- 0.006 0.043 +/- 0.005 0.037 +/- 0.005 0.041 +/- 0.005 0.040 +/- 0.005 06/22/2022 0.031 +/- 0.005 0.031 +/- 0.005 0.033 +/- 0.005 0.035 +/- 0.005 0.035 +/- 0.005 06/29/2022 0.034 +/- 0.005 0.039 +/- 0.005 0.028 +/- 0.004 0.036 +/- 0.005 0.037 +/- 0.005 07/06/2022 0.041 +/- 0.005 0.047 +/- 0.005 0.040 +/- 0.005 0.040 +/- 0.005 0.047 +/- 0.006 07/13/2022 0.040 +/- 0.005 0.043 +/- 0.005 0.034 +/- 0.005 0.041 +/- 0.005 0.041 +/- 0.005 07/20/2022 0.045 +/- 0.005 0.051 +/- 0.005 0.055 +/- 0.006 0.056 +/- 0.006 0.050 +/- 0.006 07/27/2022 0.037 +/- 0.005 0.038 +/- 0.005 0.038 +/- 0.005 0.034 +/- 0.005 0.045 +/- 0.006 08/02/2022 0.035 +/- 0.005 0.041 +/- 0.005 0.039 +/- 0.006 0.038 +/- 0.006 0.042 +/- 0.006 08/10/2022 0.022 +/- 0.003 0.027 +/- 0.004 0.020 +/- 0.003 0.025 +/- 0.003 0.032 +/- 0.004 arcadis.com 51
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 08/17/2022 0.031 +/- 0.004 0.030 +/- 0.004 0.025 +/- 0.003 0.030 +/- 0.004 0.039 +/- 0.004 08/24/2022 0.041 +/- 0.004 0.042 +/- 0.005 0.035 +/- 0.004 0.037 +/- 0.004 0.042 +/- 0.004 08/31/2022 0.034 +/- 0.004 0.036 +/- 0.004 0.029 +/- 0.004 0.034 +/- 0.004 0.039 +/- 0.004 09/07/2022 0.046 +/- 0.005 0.035 +/- 0.004 0.039 +/- 0.004 0.036 +/- 0.004 0.036 +/- 0.004 09/14/2022 0.049 +/- 0.005 0.045 +/- 0.005 0.045 +/- 0.005 0.052 +/- 0.005 0.050 +/- 0.005 09/21/2022 0.058 +/- 0.005 0.067 +/- 0.006 0.063 +/- 0.006 0.057 +/- 0.005 0.063 +/- 0.005 09/27/2022 0.032 +/- 0.004 0.031 +/- 0.005 0.025 +/- 0.004 0.029 +/- 0.004 0.031 +/- 0.004 10/05/2022 0.040 +/- 0.004 0.037 +/- 0.004 0.039 +/- 0.004 0.040 +/- 0.004 0.044 +/- 0.004 10/12/2022 0.046 +/- 0.005 0.044 +/- 0.005 0.048 +/- 0.005 0.052 +/- 0.005 0.051 +/- 0.005 10/19/2022 0.019 +/- 0.003 0.016 +/- 0.003 0.016 +/- 0.003 0.015 +/- 0.003 0.016 +/- 0.003 10/26/2022 0.052 +/- 0.005 0.053 +/- 0.005 0.047 +/- 0.005 0.062 +/- 0.006 0.058 +/- 0.005 11/02/2022 0.055 +/- 0.005 0.056 +/- 0.006 0.063 +/- 0.005 0.058 +/- 0.005 0.067 +/- 0.006 11/10/2022 0.037 +/- 0.004 0.034 +/- 0.004 0.038 +/- 0.004 0.035 +/- 0.004 0.039 +/- 0.004 11/16/2022 0.013 +/- 0.003 0.018 +/- 0.003 0.018 +/- 0.003 0.020 +/- 0.004 0.017 +/- 0.003 11/23/2022 0.056 +/- 0.005 0.053 +/- 0.005 0.057 +/- 0.005 0.052 +/- 0.005 0.054 +/- 0.005 11/30/2022 0.055 +/- 0.005 0.052 +/- 0.005 0.054 +/- 0.005 0.054 +/- 0.005 0.055 +/- 0.005 12/07/2022 0.041 +/- 0.005 0.042 +/- 0.005 0.053 +/- 0.006 0.044 +/- 0.005 0.037 +/- 0.004 12/13/2022 0.071 +/- 0.006 0.077 +/- 0.007 0.071 +/- 0.006 0.069 +/- 0.006 0.067 +/- 0.006 12/20/2022 0.030 +/- 0.004 0.028 +/- 0.004 0.034 +/- 0.004 0.030 +/- 0.004 0.028 +/- 0.004 12/27/2022 0.041 +/- 0.004 0.009 +/- 0.003 0.043 +/- 0.004 0.043 +/- 0.005 0.050 +/- 0.005 M*
Note:
The M-1 air sampler (5/11/2022 sample date) and M-2 air sampler (12/27/2022 sample date) were found to not be running on the indicated sample collection dates. Partial samples were collected. Although results are provided, these are considered missed samples (Condition Reports 501000063192 and 501000069541, respectively).
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2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT AIRBORNE PARTICULATES: GAMMA ISOTOPIC Air Station M-1 Qtr 1 Qtr 2* Qtr 3 Qtr 4 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
Barium-140 -1.60E-04 +/- 4.04E-03 3.44E-03 +/- 4.95E-03 1.97E-03 +/- 5.17E-03 8.24E-03 +/- 7.69E-03 U U U U Beryllium-7 6.52E-02 +/- 7.75E-03 1.09E-01 +/- 1.23E-02 9.58E-02 +/- 1.04E-02 5.51E-02 +/- 7.39E-03 Cerium-141 1.30E-05 +/- 5.40E-04 -4.48E-04 +/- 6.65E-04 4.48E-05 +/- 9.83E-04 2.31E-05 +/- 4.18E-04 U U U U Cerium-144 -2.92E-04 +/- 1.33E-03 -5.45E-04 +/- 1.29E-03 2.95E-04 +/- 9.80E-04 -3.57E-05 +/- 9.07E-04 U U U U Cesium-134 2.29E-04 +/- 2.86E-04 1.19E-04 +/- 3.51E-04 -7.90E-05 +/- 2.89E-04 6.27E-05 +/- 2.41E-04 U U U U Cesium-137 1.46E-04 +/- 3.02E-04 -2.04E-04 +/- 4.20E-04 1.16E-04 +/- 2.51E-04 1.15E-04 +/- 2.08E-04 U U U U Cobalt-58 -2.09E-04 +/- 3.84E-04 -2.83E-04 +/- 4.30E-04 -2.12E-05 +/- 3.02E-04 -2.44E-04 +/- 2.74E-04 U U U U Cobalt-60 -1.48E-04 +/- 3.56E-04 1.57E-04 +/- 4.14E-04 -6.52E-05 +/- 3.42E-04 -4.03E-05 +/- 3.01E-04 U U U U Lanthanum-140 -4.54E-04 +/- 1.91E-03 -7.46E-05 +/- 2.15E-03 -8.88E-04 +/- 2.30E-03 3.28E-04 +/- 1.46E-03 U U U U Manganese-54 1.34E-04 +/- 3.20E-04 7.89E-05 +/- 3.37E-04 1.52E-05 +/- 2.65E-04 5.89E-05 +/- 2.50E-04 U U U U Niobium-95 -1.97E-04 +/- 4.43E-04 -4.50E-05 +/- 3.56E-04 2.66E-05 +/- 3.35E-04 -9.26E-05 +/- 2.21E-04 U U U U Ruthenium-103 1.54E-04 +/- 3.21E-04 -1.68E-04 +/- 4.49E-04 1.64E-04 +/- 3.54E-04 -1.82E-04 +/- 2.49E-04 U U U U Ruthenium-106 5.65E-04 +/- 2.15E-03 -9.86E-04 +/- 3.41E-03 8.06E-04 +/- 1.91E-03 3.25E-04 +/- 1.72E-03 U U U U Zinc-65 -2.04E-04 +/- 5.47E-04 5.84E-04 +/- 7.92E-04 -9.27E-04 +/- 7.21E-04 1.25E-04 +/- 4.36E-04 U U U U Zirconium-95 -4.20E-05 +/- 5.96E-04 3.61E-04 +/- 6.07E-04 7.42E-05 +/- 6.73E-04 1.37E-04 +/- 5.86E-04 U U U U Note:
Second quarter 2022 Gamma Isotopic at Air Station M-1 contains a partial sample for the week of 5/11/2022 through 5/18/2022. Although the partial result is provided, this is considered a missed sample (Condition Report 501000063192).
Air Station M-2 Qtr 1 Qtr 2 Qtr 3 Qtr 4*
(pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
BariUm-140 6.67E-04 +/- 4.15E-03 -5.06E-05 +/- 3.00E-03 2.13E-03 +/- 4.31E-03 2.36E-03 +/- 6.49E-03 U U U U Beryllium-7 7.52E-02 +/- 9.58E-03 1.27E-01 +/- 1.08E-02 8.34E-02 +/- 8.02E-03 4.81E-02 +/- 1.06E-02 Cerium-141 4.84E-05 +/- 3.71E-04 4.30E-04 +/- 7.54E-04 -6.54E-04 +/- 4.83E-04 9.75E-05 +/- 5.72E-04 U U U U Cerium-144 6.74E-04 +/- 1.01E-03 4.17E-04 +/- 1.11E-03 3.78E-04 +/- 8.44E-04 -1.54E-03 +/- 1.25E-03 U U U U Cesium-134 -1.91E-05 +/- 2.61E-04 2.12E-04 +/- 2.69E-04 -1.61E-05 +/- 2.20E-04 1.83E-04 +/- 2.77E-04 U U U U Cesium-137 -2.54E-04 +/- 3.40E-04 6.24E-05 +/- 2.39E-04 -9.06E-05 +/- 2.43E-04 -3.17E-05 +/- 2.84E-04 U U U U Cobalt-58 3.07E-04 +/- 4.16E-04 -7.08E-05 +/- 2.86E-04 1.73E-04 +/- 2.50E-04 -1.36E-04 +/- 3.45E-04 U U U U Cobalt-60 2.73E-06 +/- 3.50E-04 -3.78E-05 +/- 3.12E-04 -1.12E-04 +/- 2.44E-04 1.44E-04 +/- 3.16E-04 U U U U Lanthanum-140 -4.37E-04 +/- 1.68E-03 1.35E-03 +/- 1.64E-03 -2.97E-03 +/- 2.73E-03 -3.81E-04 +/- 2.58E-03 U U U U Manganese-54 1.76E-05 +/- 2.99E-04 5.22E-05 +/- 2.91E-04 1.32E-04 +/- 2.12E-04 -3.01E-02 +/- 2.82E-04 U U U U Niobium-95 3.65E-04 +/- 4.00E-04 1.72E-04 +/- 3.34E-04 1.88E-04 +/- 3.15E-04 6.27E-04 +/- 4.52E-04 U U U U arcadis.com 53
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Air Station M-2 Qtr 1 Qtr 2 Qtr 3 Qtr 4*
(pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
Ruthenium-103 -2.39E-04 +/- 3.72E-04 -9.93E-06 +/- 3.44E-04 1.98E-04 +/- 3.36E-04 -1.42E-04 +/- 4.09E-04 U U U U Ruthenium-106 -9.86E-04 +/- 2.63E-03 -3.58E-04 +/- 2.56E-03 -1.19E-03 +/- 1.56E-03 -6.84E-04 +/- 2.43E-03 U U U U Zinc-65 -2.72E-04 +/- 9.28E-04 2.34E-04 +/- 6.11E-04 2.15E-04 +/- 4.90E-04 -5.85E-04 +/- 6.07E-04 U U U U Zirconium-95 -1.81E-04 +/- 6.35E-04 -1.75E-04 +/- 4.34E-04 1.85E-04 +/- 4.15E-04 4.19E-04 +/- 6.71E-04 U U U U Note:
Fourth quarter 2022 Gamma Isotopic at Air Station M-2 contains a partial sample for the week of 12/27/2022 through 1/4/2023. Although the partial result is provided, this is considered a missed sample (Condition Report 501000069541).
Air Station M-3 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
Barium-140 7.98E-03 +/- 1.17E-02 1.04E-03 +/- 3.12E-03 2.47E-03 +/- 5.18E-03 -3.19E-03 +/- 6.30E-03 UI U U U Beryllium-7 6.02E-02 +/- 8.73E-03 1.13E-01 +/- 1.02E-02 8.23E-02 +/- 8.57E-03 6.15E-02 +/- 1.04E-02 Cerium-141 3.16E-04 +/- 7.68E-04 -2.99E-04 +/- 5.07E-04 -5.97E-05 +/- 5.29E-04 4.43E-04 +/- 6.16E-04 U U U U Cerium-144 2.97E-06 +/- 1.14E-03 5.74E-04 +/- 1.03E-03 -3.86E-04 +/- 1.06E-03 -4.04E-05 +/- 8.42E-04 U U U U Cesium-134 -3.19E-05 +/- 3.28E-04 -6.58E-05 +/- 2.97E-04 4.85E-04 +/- 3.88E-04 3.25E-04 +/- 3.35E-04 U U UI U Cesium-137 1.57E-04 +/- 2.15E-04 -1.26E-04 +/- 2.81E-04 -6.80E-05 +/- 3.18E-04 -9.45E-05 +/- 3.86E-04 U U U U Cobalt-58 2.86E-04 +/- 2.71E-04 -2.19E-05 +/- 3.18E-04 6.28E-05 +/- 2.76E-04 -1.73E-04 +/- 4.68E-04 U U U U Cobalt-60 6.74E-05 +/- 2.92E-04 5.15E-05 +/- 2.54E-04 3.31E-04 +/- 2.64E-04 -2.33E-04 +/- 4.17E-04 U U U U Lanthanum-140 1.20E-03 +/- 1.70E-03 -1.25E-03 +/- 1.40E-03 7.72E-04 +/- 1.89E-03 -3.88E-04 +/- 1.85E-03 U U U U Manganese-54 3.07E-06 +/- 2.34E-04 -6.76E-05 +/- 2.89E-04 2.65E-04 +/- 2.59E-04 1.09E-04 +/- 2.68E-04 U U U U Niobium-95 3.68E-04 +/- 4.49E-04 -5.44E-05 +/- 2.59E-04 1.08E-04 +/- 2.96E-04 2.34E-04 +/- 4.17E-04 U U U U Ruthenium-103 3.97E-04 +/- 3.40E-04 7.19E-05 +/- 2.98E-04 -1.09E-05 +/- 3.39E-04 2.92E-04 +/- 4.39E-04 U U U U Ruthenium-106 -4.34E-04 +/- 2.40E-03 -5.79E-04 +/- 1.67E-03 -3.75E-04 +/- 2.57E-03 -3.64E-04 +/- 2.66E-03 U U U U Zinc-65 -3.79E-04 +/- 6.30E-04 3.98E-04 +/- 4.56E-04 -1.24E-04 +/- 5.86E-04 -4.82E-04 +/- 7.45E-04 U U U U Zirconium-95 1.31E-04 +/- 5.81E-04 2.12E-04 +/- 4.76E-04 -4.79E-06 +/- 5.48E-04 1.09E-04 +/- 7.30E-04 U U U U Air Station M-4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (pCi/m )3 (pCi/m )3 (pCi/m )3 (pCi/m3)
Barium-140 -2.31E-03 +/- 5.19E-03 8.91E-04 +/- 4.56E-03 2.44E-03 +/- 4.33E-03 2.70E-05 +/- 7.19E-03 U U U U Beryllium-7 7.76E-02 +/- 1.02E-02 1.17E-01 +/- 1.36E-02 8.34E-02 +/- 8.89E-03 4.97E-02 +/- 7.92E-03 Cerium-141 -3.58E-05 +/- 4.01E-04 3.71E-04 +/- 1.28E-03 -2.13E-04 +/- 4.73E-04 -2.50E-04 +/- 6.81E-04 U U U U Cerium-144 -3.83E-04 +/- 1.01E-03 -3.26E-04 +/- 1.43E-03 -5.79E-04 +/- 8.80E-04 -4.18E-04 +/- 1.34E-03 U U U U Cesium-134 1.86E-04 +/- 2.94E-04 -1.27E-04 +/- 4.42E-04 1.67E-04 +/- 2.55E-04 9.55E-05 +/- 3.21E-04 U U U U arcadis.com 54
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Air Station M-4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
Cesium-137 -1.73E-04 +/- 3.75E-04 -7.46E-05 +/- 3.69E-04 1.20E-04 +/- 2.29E-04 4.84E-05 +/- 3.76E-04 U U U U Cobalt-58 1.75E-04 +/- 3.50E-04 -3.26E-04 +/- 3.95E-04 -1.94E-04 +/- 3.52E-04 1.80E-04 +/- 4.68E-04 U U U U Cobalt-60 -9.45E-06 +/- 3.97E-04 2.94E-04 +/- 3.10E-04 -2.60E-04 +/- 2.92E-04 8.79E-05 +/- 4.23E-04 U U U U Lanthanum-140 2.94E-05 +/- 1.09E-03 9.28E-04 +/- 2.27E-03 2.09E-04 +/- 1.66E-03 -1.26E-03 +/- 2.77E-03 U U U U Manganese-54 -1.20E-04 +/- 3.20E-04 1.34E-05 +/- 3.64E-04 1.54E-04 +/- 2.30E-04 9.83E-05 +/- 3.48E-04 U U U U Niobium-95 -5.09E-05 +/- 3.84E-04 -2.67E-04 +/- 4.00E-04 -1.33E-04 +/- 3.49E-04 4.43E-04 +/- 4.78E-04 U U U U Ruthenium-103 2.06E-04 +/- 3.88E-04 4.53E-05 +/- 4.72E-04 8.70E-05 +/- 2.79E-04 1.23E-04 +/- 4.82E-04 U U U U Ruthenium-106 -3.08E-04 +/- 2.69E-03 -6.93E-04 +/- 2.94E-03 5.36E-04 +/- 1.79E-03 1.97E-03 +/- 1.95E-03 U U U U Zinc-65 -7.37E-06 +/- 6.64E-04 2.18E-04 +/- 7.63E-04 1.19E-04 +/- 4.62E-04 -3.29E-04 +/- 8.40E-04 U U U U Zirconium-95 -2.06E-04 +/- 8.35E-04 3.14E-04 +/- 6.79E-04 -2.16E-04 +/- 5.92E-04 1.13E-04 +/- 8.25E-04 U U U U Air Station M-5 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
-2.84E-04 +/- 4.40E-03 -9.95E-04 +/- 3.65E-03 -3.42E-03 +/- 5.27E-03 -2.54E-03 +/- 6.23E-03 Barium-140 U U U U Beryllium-7 7.51E-02 +/- 9.26E-03 1.21E-01 +/- 1.11E-02 9.17E-02 +/- 8.37E-03 5.07E-02 +/- 9.34E-03
-8.99E-05 +/- 4.70E-04 -8.91E-06 +/- 4.37E-04 -1.76E-04 +/- 6.51E-04 -3.18E-04 +/- 5.50E-04 Cerium-141 U U U U 2.61E-04 +/- 1.15E-03 -7.38E-05 +/- 1.42E-03 1.09E-03 +/- 1.17E-03 5.81E-04 +/- 9.71E-04 Cerium-144 U U U U 1.75E-04 +/- 3.13E-04 -2.66E-04 +/- 2.83E-04 5.12E-05 +/- 2.75E-04 -7.88E-05 +/- 3.16E-04 Cesium-134 U U U U 1.84E-05 +/- 3.20E-04 -2.72E-04 +/- 2.95E-04 2.13E-04 +/- 2.34E-04 1.23E-04 +/- 2.92E-04 Cesium-137 U U U U
-2.64E-05 +/- 3.65E-04 5.02E-05 +/- 3.60E-04 -1.25E-04 +/- 2.75E-04 -2.67E-04 +/- 3.40E-04 Cobalt-58 U U U U 8.33E-05 +/- 1.87E-04 2.26E-04 +/- 3.69E-04 7.39E-05 +/- 2.23E-04 1.41E-04 +/- 2.85E-04 Cobalt-60 U U U U
-4.12E-04 +/- 1.59E-03 3.19E-04 +/- 1.63E-03 7.59E-04 +/- 2.19E-03 -4.89E-03 +/- 4.07E-03 Lanthanum-140 U U U U 1.79E-05 +/- 3.08E-04 -4.58E-05 +/- 2.82E-04 -1.12E-04 +/- 2.19E-04 3.16E-05 +/- 3.46E-04 Manganese-54 U U U U 2.59E-06 +/- 3.31E-04 4.01E-05 +/- 3.26E-04 -9.39E-05 +/- 3.60E-04 3.63E-04 +/- 3.83E-04 Niobium-95 U U U U
-1.80E-04 +/- 4.02E-04 -2.29E-04 +/- 3.01E-04 1.08E-04 +/- 3.62E-04 -4.45E-04 +/- 4.00E-04 Ruthenium-103 U U U U 1.06E-03 +/- 2.31E-03 3.42E-04 +/- 2.28E-03 -5.55E-04 +/- 2.30E-03 -4.02E-04 +/- 2.74E-03 Ruthenium-106 U U U U 8.52E-05 +/- 4.66E-04 1.02E-04 +/- 6.36E-04 -4.39E-04 +/- 5.92E-04 -2.08E-04 +/- 7.37E-04 Zinc-65 U U U U 2.88E-04 +/- 6.27E-04 2.09E-04 +/- 5.22E-04 -9.61E-05 +/- 5.82E-04 3.62E-04 +/- 7.63E-04 Zirconium-95 U U U U arcadis.com 55
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT SEDIMENT: GAMMA ISOTOPIC M-8c Upstream of Qtr 2 Qtr 4 M-9 Downstream Qtr 2 Qtr 4 Plant of Plant (pCi/Kg, dry) (pCi/Kg, dry) (pCi/Kg, dry) (pCi/Kg, dry)
Barium-140 -3.7 +/- 64.2 97.7 +/- 128.0 Barium-140 -50.2 +/- 90.8 46.4 +/- 210.0 U U U U Beryllium-7 477.0 +/- 235.0 -55.7 +/- 172.0 Beryllium-7 191.0 +/- 311.0 2230.0 +/- 613.0 U U Cerium-144 33.6 +/- 73.8 -13.6 +/- 88.1 Cerium-144 -14.1 +/- 90.7 45.7 +/- 149.0 U U U U Cesium-134 12.6 +/- 18.8 19.9 +/- 42.1 Cesium-134 39.3 +/- 23.3 26.7 +/- 32.1 U U U U Cesium-137 21.8 +/- 30.6 34.1 +/- 28.4 Cesium-137 31.0 +/- 39.7 87.6 +/- 55.6 U UI UI UI Cobalt-58 10.1 +/- 17.6 6.7 +/- 17.8 Cobalt-58 51.6 +/- 60.3 8.2 +/- 33.6 U U UI U Cobalt-60 9.6 +/- 17.5 7.6 +/- 20.6 Cobalt-60 1.4 +/- 27.7 -7.8 +/- 27.1 U U U U Iron-59 -9.5 +/- 33.8 -40.6 +/- 48.6 Iron-59 12.0 +/- 40.4 -46.4 +/- 69.5 U U U U Lanthanum-140 -2.2 +/- 20.5 -10.0 +/- 37.5 Lanthanum-140 -17.4 +/- 25.9 -66.0 +/- 67.6 U U U U Manganese-54 5.6 +/- 15.9 14.0 +/- 21.5 Manganese-54 14.5 +/- 18.6 22.7 +/- 27.6 U U U U Niobium-95 -12.6 +/- 18.3 4.3 +/- 22.9 Niobium-95 -9.7 +/- 19.8 19.0 +/- 33.9 U U U U Potassium-40 10200.0 +/- 814.0 10100.0 +/- 956.0 Potassium-40 11600.0 +/- 971.0 10200.0 +/- 1220.0 Ruthenium-103 2.0 +/- 14.4 24.3 +/- 19.0 Ruthenium-103 8.4 +/- 17.7 -15.7 +/- 29.0 U U U U Ruthenium-106 67.1 +/- 137.0 60.4 +/- 157.0 Ruthenium-106 -15.0 +/- 152.0 130.0 +/- 214.0 U U U U Zinc-65 14.9 +/- 35.7 -22.3 +/- 51.0 Zinc-65 -17.1 +/- 54.6 -6.6 +/- 74.9 U U U U Zirconium-95 17.9 +/- 25.3 -2.5 +/- 42.9 Zirconium-95 12.5 +/- 31.9 -26.7 +/- 57.4 U U U U arcadis.com 56
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT M-15 Montissippi Park Qtr 2 Qtr 4 (pCi/Kg, dry) (pCi/Kg, dry)
Barium-140 108.0 +/- 89.0 19.0 +/- 103.0 U U Beryllium-7 -29.9 +/- 136.0 351.0 +/- 260.0 U
Cerium-144 53.2 +/- 91.2 42.1 +/- 85.1 U U Cesium-134 21.0 +/- 30.7 5.9 +/- 17.5 U U Cesium-137 81.3 +/- 37.3 15.8 +/- 26.2 UI U Cobalt-58 -19.8 +/- 18.7 -8.5 +/- 15.9 U U Cobalt-60 3.2 +/- 22.5 -2.5 +/- 16.8 U U Iron-59 -4.6 +/- 43.5 -29.3 +/- 43.0 U U Lanthanum-140 -13.5 +/- 32.1 -6.1 +/- 27.5 U U Manganese-54 0.4 +/- 18.5 -3.7 +/- 16.7 U U Niobium-95 11.2 +/- 22.4 -0.5 +/- 17.3 U U Potassium-40 9740.0 +/- 890.0 13100.0 +/- 861.0 Ruthenium-103 -6.4 +/- 15.4 2.0 +/- 15.3 U U Ruthenium-106 15.8 +/- 167.0 93.3 +/- 124.0 U U Zinc-65 -7.0 +/- 40.4 -0.4 +/- 48.1 U U Zirconium-95 19.8 +/- 34.1 16.8 +/- 38.1 U U arcadis.com 57
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT TISSUE - FISH: GAMMA ISOTOPIC M-8c Upstream of Plant M-9 Downstream of Plant (pCi/Kg, wet)
June Sep June Sep Fish 1 Fish 2 Fish 1 Fish 2 Fish 1 Fish 2 Fish 1 Fish 2 Barium-140 -22.0 +/- 37.4 2.5 +/- 33.4 6.4 +/- 13.5 114.0 +/- 99.6 -15.3 +/- 17.8 7.6 +/- 24.5 4.6 +/- 13.4 8.8 +/- 17.1 U U U U U U U U Cerium-144 -15.1 +/- 38.9 -15.5 +/- 33.9 8.7 +/- 14.8 30.8 +/- 37.2 -5.5 +/- 17.8 -14.4 +/- 24.9 -2.7 +/- 18.2 12.4 +/- 38.9 U U U U U U U U Cesium-134 7.3 +/- 8.5 0.5 +/- 7.4 -0.5 +/- 3.0 -0.3 +/- 6.8 0.7 +/- 3.7 1.2 +/- 5.0 1.8 +/- 3.3 -1.3 +/- 4.3 U U U U U U U U Cesium-137 -0.7 +/- 8.5 10.2 +/- 11.5 3.5 +/- 4.6 5.1 +/- 8.0 2.0 +/- 4.1 2.1 +/- 8.1 4.3 +/- 5.6 1.3 +/- 3.9 U U U U U U U U Cobalt-58 -0.9 +/- 7.4 -1.0 +/- 6.9 0.5 +/- 2.9 -7.8 +/- 8.3 0.1 +/- 3.3 -3.7 +/- 5.3 2.1 +/- 2.9 2.3 +/- 4.0 U U U U U U U U Cobalt-60 -2.6 +/- 8.3 -0.5 +/- 7.3 3.5 +/- 3.1 -1.6 +/- 7.9 -1.9 +/- 3.8 -0.5 +/- 5.3 1.3 +/- 3.3 -0.4 +/- 3.7 U U U U U U U U Iron-59 -9.0 +/- 16.0 -4.4 +/- 16.6 4.7 +/- 6.8 -12.3 +/- 21.9 -1.7 +/- 7.3 3.0 +/- 11.5 2.0 +/- 8.4 -5.0 +/- 8.6 U U U U U U U U Lanthanum-140 -4.4 +/- 13.0 -3.0 +/- 10.4 0.4 +/- 3.7 -10.2 +/- 48.7 -0.1 +/- 3.2 -6.3 +/- 9.2 5.3 +/- 4.0 0.2 +/- 4.2 U U U U U U U U Manganese-54 -2.6 +/- 8.3 3.5 +/- 7.5 1.2 +/- 2.5 3.7 +/- 6.5 3.8 +/- 3.8 -4.0 +/- 4.7 -0.3 +/- 4.6 -1.3 +/- 3.5 U U U U U U U U Niobium-95 -8.7 +/- 9.3 -4.8 +/- 9.2 3.5 +/- 3.1 4.1 +/- 9.1 0.8 +/- 3.8 3.3 +/- 5.0 -0.3 +/- 3.0 3.6 +/- 4.0 U U U U U U U U Potassium-40 2750.0 2740.0 3310.0 3590.0 3480.0 3240.0 3470.0 3520.0
+/- +/- +/- +/- +/- +/- +/- +/-
313.0 310.0 186.0 369.0 217.0 257.0 213.0 222.0 Zinc-65 0.4 +/- 16.6 -1.2 +/- 17.9 0.5 +/- 8.0 9.2 +/- 22.0 -5.4 +/- 9.7 1.1 +/- 10.5 -2.8 +/- 10.3 15.7 +/- 9.7 U U U U U U U U Zirconium-95 -7.8 +/- 12.7 -0.5 +/- 12.4 1.8 +/- 5.2 -6.5 +/- 13.6 3.3 +/- 6.9 2.1 +/- 8.6 0.6 +/- 6.0 6.2 +/- 6.6 U U U U U U U U arcadis.com 58
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT TISSUE - PLANT: GAMMA ISOTOPIC M-41 Training Center M-42 Biology Station Road pCi/Kg Jun Jul Aug Sep Jun Jul Aug Sep Cesium-134 -2.0 +/- 8.1 3.4 +/- 7.6 5.6 +/- 15.0 0.0 +/- 11.4 5.9 +/- 10.8 16.1 +/- 14.1 16.6 +/- 14.0 -4.8 +/- 12.1 U U U U U U U U Cesium-137 11.5 +/- 15.5 5.1 +/- 9.3 -6.6 +/- 13.4 -7.3 +/- 19.5 5.8 +/- 10.8 -21.0 +/- 18.7 6.7 +/- 11.4 -4.8 +/- 8.9 U U U U U U U U Cobalt-58 -0.4 +/- 6.8 6.9 +/- 8.6 5.6 +/- 12.2 8.6 +/- 10.1 -4.9 +/- 11.4 -2.4 +/- 11.9 10.2 +/- 9.0 -0.9 +/- 11.4 U U U U U U U U Cobalt-60 5.1 +/- 9.2 0.9 +/- 9.6 -0.7 +/- 15.9 5.8 +/- 10.4 -2.3 +/- 11.6 1.9 +/- 12.4 7.0 +/- 12.0 14.3 +/- 9.2 U U U U U U U U Iodine-131 -10.5 +/- 11.3 2.2 +/- 12.0 3.5 +/- 15.8 18.6 +/- 34.9 0.0 +/- 13.1 0.6 +/- 15.5 14.0 +/- 17.9 -2.2 +/- 24.7 U U U U U U U U Iron-59 -1.2 +/- 16.5 8.0 +/- 15.8 9.5 +/- 26.7 0.2 +/- 22.5 2.4 +/- 23.9 -0.4 +/- 20.1 0.7 +/- 22.3 -1.0 +/- 17.3 U U U U U U U U Manganese-54 -0.4 +/- 7.5 6.4 +/- 7.9 -3.7 +/- 12.5 -13.8 +/- 15.7 6.3 +/- 10.2 -2.2 +/- 10.7 7.5 +/- 11.8 -3.0 +/- 9.6 U U U U U U U U Niobium-95 -10.0 +/- 10.7 1.6 +/- 8.4 3.3 +/- 14.4 2.1 +/- 14.1 -0.5 +/- 10.4 3.1 +/- 11.1 8.9 +/- 14.4 3.2 +/- 9.8 U U U U U U U U Zinc-65 -13.0 +/- 19.2 14.3 +/- 20.5 13.4 +/- 30.7 -13.2 +/- 21.8 -16.3 +/- 27.9 -1.6 +/- 24.7 3.1 +/- 22.1 4.5 +/- 17.2 U U U U U U U U M-43 Imholte Farm pCi/Kg Jun Jul Aug Sep Cesium-134 0.8 +/- 5.2 13.6 +/- 13.1 7.9 +/- 16.0 2.5 +/- 8.1 U U U U Cesium-137 2.3 +/- 6.5 7.5 +/- 12.0 -17.5 +/- 20.2 -1.5 +/- 8.0 U U U U Cobalt-58 -2.1 +/- 4.7 0.6 +/- 10.5 -7.6 +/- 12.2 -1.1 +/- 7.5 U U U U Cobalt-60 -2.4 +/- 5.6 1.5 +/- 10.2 -1.1 +/- 12.6 -0.6 +/- 6.9 U U U U Iodine-131 4.2 +/- 5.3 -0.3 +/- 17.3 19.8 +/- 25.5 -3.7 +/- 20.9 U U U U Iron-59 11.5 +/- 13.0 18.0 +/- 27.1 11.2 +/- 21.6 -2.4 +/- 15.8 U U U U Manganese-54 0.7 +/- 5.5 7.7 +/- 11.6 0.5 +/- 10.0 6.6 +/- 7.0 U U U U Niobium-95 3.0 +/- 5.2 -1.5 +/- 10.9 -1.2 +/- 9.6 7.0 +/- 7.6 U U U U Zinc-65 5.4 +/- 13.3 -10.8 +/- 31.6 -15.4 +/- 22.6 -1.1 +/- 16.7 U U U U arcadis.com 59
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT WATER: TRITIUM pCi/L Qtr 1 Qtr 2 Qtr 3 Qtr 41
-8.48 +/- 168 -57 +/- 173 4.9 +/- 163 49.2 +/- 229 M-11 City of Monticello U U U U 13.1 +/- 171 -151 +/- 167 113 +/- 151 -138 +/- 221 M-12 Plant Well #11 U U U U M-14 City of 69.6 +/- 206 9.42 +/- 188 63.5E +/- 214 25.0 +/- 132 Minneapolis1 U U U U 90.4 +/- 168 -34.0 +/- 165 -87.9 +/- 150 -81.8 +/- 213 M-43 Imholte Farm U U U U M-55 Hasbrouck 77.3 +/- 173 -87.6 +/- 170 65.8 +/- 152 40.8 +/- 232 Residence U U U U 108 +/- 137 292 +/- 286 -964 +/- 234 60.8 +/- 251 M-8 Upstream of Plant U U U U M-9 Downstream of 276 +/- 248 212 +/- 281 12.7 +/- 229 -65.9 +/- 245 Plant U U U U 1Quarterly composite samples continued over into subsequent quarters. Q4 2022 composite sample collection continued into January 3, 2023.
arcadis.com 60
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT WATER - DRINKING: GROSS BETA M-14 City of Gross Beta Minneapolis (pCi/L) 1.28 +/- 2.25 Jan U
1.54 +/- 1.98 Feb U
0.327 +/- 2.07 Mar U
2.97 +/- 2.34 Apr M
1.94 +/- 2.32 May U
0.261 +/- 1.71 Jun U
1.89 +/- 1.87 Jul U
2.80 +/- 2.52 Aug U
1.84+/- 2.31 Sep U
3.23 +/- 2.26 Oct U
1.09+/- 2.04 Nov U
2.10 +/- 1.99 Dec U
arcadis.com 61
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT WATER - GROUNDWATER: GAMMA ISOTOPIC Qtr 1 Qtr 2 Qtr 3 Qtr 4 M-11 City of Monticello (pCi/L) (pCi/L) (pCi/L) (pCi/L)
-1.41E-01 +/- 5.07E+00 -2.73E+00 +/- 8.05E+00 1.44E01 +/- 8.31E+00 -2.16E+00 +/- 1.13E+01 Barium-140 U U U U 3.81E+00 +/- 6.93E+00 2.06E+00 +/- 6.45E+00 -5.53E-02 +/- 7.15E+00 5.43E+00 +/- 1.53E+01 Cerium-144 U U U U 4.69E-01 +/- 1.10E+00 -3.55E-02 +/- 1.00E+00 7.42E01 +/- 1.10E+00 2.78E-01 +/- 1.78E+00 Cesium-134 U U U U
-9.00E-01 +/- 1.18E+00 3.39E-01 +/- 1.01E+00 1.85E+00 +/- 2.56E+00 1.41E+00 +/- 2.11E+00 Cesium-137 U U U U
-1.67E+00 +/- 1.02E+00 -7.74E-01 +/- 9.45E-01 6.22E01 +/- 1.11E+00 -1.13E+00 +/- 2.19E+00 Cobalt-58 U U U U
-5.81E-01 +/- 9.73E-01 2.65E-01 +/- 2.07E+00 1.01E+00 +/- 1.17E+00 6.37E-01 +/- 2.34E+00 Cobalt-60 U U U U 1.08E+00 +/- 2.12E+00 -5.60E-01 +/- 2.34E+00 1.13E+00 +/- 2.35E+00 2.80E+00 +/- 4.57E+00 Iron-59 U U U U
-1.60E+00 +/- 1.78E+00 -1.26E+00 +/- 2.84E+00 5.63E01 +/- 2.90E+00 6.39E-01 +/- 4.88E+00 Lanthanum-140 U U U U 2.19E-01 +/- 1.05E+00 -3.09E-02 +/- 9.62E-01 7.77E01 +/- 1.21E+00 -1.90E+00 +/- 2.20E+00 Manganese-54 U U U U
-1.07E+00 +/- 1.63E+00 -9.34E-01 +/- 1.19E+00 4.96E01 +/- 1.26E+00 6.80E-01 +/- 2.33E+00 Niobium-95 U U U U 5.16E-01 +/- 2.61E+00 2.46E-01 +/- 1.78E+00 6.24E01 +/- 1.96E+00 3.79E+00 +/- 4.76E+00 Zinc-65 U U U U
-2.11E-01 +/- 1.78E+00 1.54E+00 +/- 1.82E+00 1.58E+00 +/- 2.02E+00 -1.14E+00 +/- 2.97E+00 Zirconium-95 U U U U Qtr 1 Qtr 2 Qtr 3 Qtr 4 M-12 Plant Well #11 (pCi/L) (pCi/L) (pCi/L) (pCi/L) 4.67E+00 +/- 5.10E+00 1.83E+00 +/- 6.42E+00 5.46E+00 +/- 7.58E+00 -6.71E+00 +/- 2.35E+01 Barium-140 U U U U
-8.74E+00 +/- 1.03E+01 2.34E+00 +/- 5.08E+00 -1.13E+00 +/- 7.36E+00 -1.55E+01 +/- 2.55E+01 Cerium-144 U U U U 7.77E-01 +/- 1.07E+00 1.34E-01 +/- 8.23E-01 3.40E01 +/- 1.11E+00 -1.23E-01 +/- 4.41E+00 Cesium-134 U U U U 1.97E-01 +/- 1.07E+00 5.06E-01 +/- 8.18E-01 5.99E01 +/- 9.85E01 9.54E-01 +/- 4.62E+00 Cesium-137 U U U U
-2.30E-01 +/- 8.68E-01 -1.81E-01 +/- 8.91E-01 3.39E01 +/- 1.23E+00 1.76E-02 +/- 3.31E+00 Cobalt-58 U U U U 7.20E-01 +/- 1.06E+00 -1.42E-01 +/- 7.69E-01 3.59E02 +/- 1.03E+00 4.18E+00 +/- 3.92E+00 Cobalt-60 U U U U
-1.05E+00 +/- 2.17E+00 7.11E-01 +/- 1.85E+00 1.24E+00 +/- 2.41E+00 4.35E+00 +/- 6.49E+00 Iron-59 U U U U
-9.59E-01 +/- 1.86E+00 4.33E-01 +/- 2.60E+00 1.09E+00 +/- 2.58E+00 2.46E+00 +/- 5.12E+00 Lanthanum-140 U U U U 1.81E-01 +/- 1.09E+00 -1.61E-01 +/- 8.04E-01 3.33E01 +/- 1.05E+00 -5.85E-01 +/- 3.54E+00 Manganese-54 U U U U 8.43E-01 +/- 1.10E+00 5.20E-01 +/- 8.59E-01 6.04E01 +/- 1.14E+00 2.49E-01 +/- 4.53E+00 Niobium-95 U U U U 2.05E+00 +/- 2.41E+00 -1.36E+00 +/- 1.47E+00 3.00E02 +/- 2.42E+00 3.14E+00 +/- 4.55E+00 Zinc-65 U U U U 2.15E+00 +/- 1.97E+00 1.59E+00 +/- 1.46E+00 9.67E02 +/- 1.91E+00 -5.20E-01 +/- 7.33E+00 Zirconium-95 U U U U arcadis.com 62
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Qtr 1 Qtr 2 Qtr 3 Qtr 4 M-43 Imholte Farm (pCi/L) (pCi/L) (pCi/L) (pCi/L) 3.68E-02 +/- 5.19E+00 6.18E+00 +/- 7.68E+00 1.23E+00 +/- 6.67E+00 8.62E+00 +/- 1.38E+01 Barium-140 U U U U
-2.74E+00 +/- 7.58E+00 4.85E+00 +/- 6.99E+00 3.31E+00 +/- 6.42E+00 -9.08E-01 +/- 1.42E+01 Cerium-144 U U U U
-3.97E-01 +/- 1.20E+00 1.02E+00 +/- 1.01E+00 1.33E-01 +/- 1.01E+00 -4.66E-02 +/- 2.15E+00 Cesium-134 U U U U 3.68E-01 +/- 1.10E+00 -4.42E+00 +/- 2.31E+00 5.22E-01 +/- 1.98E+00 -6.96E-01 +/- 2.33E+00 Cesium-137 U U U U 5.07E-01 +/- 1.00E+00 -1.95E-01 +/- 1.02E+00 -1.18E+00 +/- 1.49E+00 -2.81E-01 +/- 1.87E+00 Cobalt-58 U U U U
-8.38E-01 +/- 1.12E+00 -1.95E-01 +/- 9.92E-01 2.62E-01 +/- 1.06E+00 -6.26E-01 +/- 2.21E+00 Cobalt-60 U U U U
-6.89E-01 +/- 2.09E+00 1.05E+00 +/- 2.12E+00 -6.56E-01 +/- 2.08E+00 -5.85E-01 +/- 6.09E+00 Iron-59 U U U U
-1.56E-01 +/- 1.87E+00 1.74E+00 +/- 2.78E+00 -4.87E-01 +/- 2.27E+00 -3.22E+00 +/- 4.32E+00 Lanthanum-140 U U U U
-6.81E-01 +/- 1.04E+00 -3.85E-01 +/- 9.51E-01 -3.16E-01 +/- 8.84E-01 -1.01E+00 +/- 2.53E+00 Manganese-54 U U U U 2.32E-01 +/- 2.16E+00 -1.21E+00 +/- 1.72E+00 9.43E-02 +/- 1.02E+00 1.69E+00 +/- 2.46E+00 Niobium-95 U U U U 2.71E-01 +/- 2.41E+00 -9.87E-02 +/- 1.95E+00 7.83E-01 +/- 1.96E+00 9.48E-01 +/- 4.58E+00 Zinc-65 U U U U 4.82E-01 +/- 1.79E+00 -1.82E+00 +/- 1.83E+00 -8.51E-01 +/- 1.67E+00 -2.05E+00 +/- 3.78E+00 Zirconium-95 U U U U Qtr 1 Qtr 2 Qtr 3 Qtr 4 M-55 Hasbrouck Residence (pCi/L) (pCi/L) (pCi/L) (pCi/L) 2.55E-01 +/- 4.49E+00 -9.54E+00 +/- 9.43E+00 1.98E+00 +/- 6.87E+00 -4.37E+00 +/- 1.76E+01 Barium-140 U U U U
-6.16E-01 +/- 5.74E+00 -9.23E-01 +/- 5.05E+00 2.80E+00 +/- 5.53E+00 5.62E-01 +/- 1.48E+01 Cerium-144 U U U U 5.99E-01 +/- 9.61E-01 -1.58E+00 +/- 1.48E+00 2.91E01 +/- 9.81E01 1.02E+00 +/- 3.76E+00 Cesium-134 U U U U
-3.59E-01 +/- 8.84E-01 -1.70E+00 +/- 2.18E+00 7.05E01 +/- 9.53E01 -3.67E+00 +/- 3.88E+00 Cesium-137 U U U U 1.18E+00 +/- 2.80E+00 -9.77E-01 +/- 8.43E-01 5.86E01 +/- 9.17E01 3.98E-01 +/- 3.20E+00 Cobalt-58 U U U U
-6.09E-01 +/- 8.75E-01 2.41E+00 +/- 1.43E+00 5.97E02 +/- 8.69E01 -1.32E+00 +/- 3.73E+00 Cobalt-60 U UI U U 1.20E-01 +/- 1.80E+00 8.78E-02 +/- 1.85E+00 3.63E01 +/- 1.86E+00 2.05E-02 +/- 6.32E+00 Iron-59 U U U U
-7.09E-01 +/- 1.43E+00 -4.05E-01 +/- 2.20E+00 2.67E+00 +/- 2.23E+00 2.42E+00 +/- 5.23E+00 Lanthanum-140 U U U U 6.17E-01 +/- 1.53E+00 5.76E-01 +/- 8.08E-01 2.22E01 +/- 8.81E01 4.01E-01 +/- 2.90E+00 Manganese-54 U U U U 8.53E-01 +/- 9.79E-01 6.62E-01 +/- 8.34E-01 1.15E01 +/- 1.01E+00 1.48E+00 +/- 4.25E+00 Niobium-95 U U U U 1.05E-01 +/- 2.17E+00 -8.08E-01 +/- 1.51E+00 5.20E03 +/- 1.89E+00 -7.95E+00 +/- 9.15E+00 Zinc-65 U U U U
-8.37E-01 +/- 1.51E+00 -1.29E+00 +/- 1.42E+00 8.55E01 +/- 1.64E+00 1.21E+00 +/- 6.83E+00 Zirconium-95 U U U U arcadis.com 63
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT WATER - DRINKING: GAMMA ISOTOPIC M-14 City of Minneapolis pCi/L Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Barium-140 -8.590 +/- 22.200 +/- -17.100 +/- -7.270 +/- -10.400 +/- 13.600 +/- 2.830 +/- 4.950 +/- -0.929 +/- -2.560 +/- -2.760 +/- -5.360 +/-
15.400 21.700 18.000 15.600 19.200 11.800 14.300 14.500 8.590 10.800 11.800 13.600 U U U U U U U U U U U U Cerium-144 3.700 +/- 0.212 +/- 13.600 +/- -1.890 +/- 1.090 +/- -6.190 +/- 0.000 +/- -2.030 +/- 2.370 +/- 2.530 +/- -2.770 +/- -1.400 +/-
13.700 16.900 17.800 10.900 16.900 15.500 17.200 14.800 10.900 11.900 13.700 9.280 U U U U U U U U U U U U Cesium-134 2.160 +/- 1.370 +/- 1.000 +/- -1.000 +/- 2.470 +/- -0.493 +/- 0.000 +/- 0.935 +/- -0.960 +/- -0.117 +/- -1.060 +/- 0.454 +/-
2.140 2.940 2.660 1.670 4.320 2.340 2.130 3.430 2.290 1.940 2.190 1.210 U U U U U U U U U U U U Cesium-137 1.090 +/- 0.638 +/- 0.461 +/- -0.844 +/- -0.475 +/- 0.126 +/- 1.460 +/- -2.390 +/- -0.804 +/- -1.710 +/- 0.772 +/- 1.500 +/-
1.980 3.300 2.140 1.500 4.740 5.450 2.460 2.600 1.690 1.960 2.490 1.870 U U U U U U U U U U U U Cobalt-58 -0.556 +/- 0.035 +/- -1.600 +/- 5.260 +/- 0.746 +/- 0.223 +/- 0.000 +/- -0.320 +/- -1.030 +/- 1.840 +/- 1.120 +/- 0.513 +/-
2.200 3.020 2.560 3.650 2.620 2.090 1.850 2.080 1.650 2.000 2.290 1.390 U U U UI U U U U U U U U Cobalt-60 -0.068 +/- -3.400 +/- -0.541 +/- 1.330 +/- 1.430 +/- 0.479 +/- 0.000 +/- 1.730 +/- 1.820 +/- -0.062 +/- 0.991 +/- -0.376 +/-
2.070 3.450 2.090 1.590 2.040 2.320 2.270 2.740 1.680 1.830 2.300 1.150 U U U U U U U U U U U U Iron-59 -0.374 +/- 2.910 +/- 1.410 +/- -2.720 +/- -2.140 +/- -1.600 +/- 0.000 +/- -2.710 +/- 0.423 +/- 1.330 +/- 0.248 +/- -0.644 +/-
4.810 4.970 4.750 4.010 6.770 5.000 8.200 5.860 2.310 5.200 4.020 2.840 U U U U U U U U U U U U Lanthanum-140 -0.715 +/- -3.380 +/- -1.260 +/- -1.770 +/- -2.780 +/- -1.660 +/- 0.000 +/- 1.490 +/- 0.169 +/- 0.654 +/- -2.240 +/- -2.120 +/-
3.410 7.500 4.420 4.870 8.380 3.720 5.980 4.740 1.900 2.440 5.120 2.630 U U U U U U U U U U U U Manganese-54 0.142 +/- -0.055 +/- -2.330 +/- 0.172 +/- 0.627 +/- -1.860 +/- 0.000 +/- -2.080 +/- -0.054 +/- -0.920 +/- -0.143 +/- 0.143 +/-
2.080 2.230 2.440 1.620 2.550 2.500 2.500 2.190 1.620 1.850 2.280 1.170 U U U U U U U U U U U U Niobium-95 -2.600 +/- -3.420 +/- -1.620 +/- 0.401 +/- 0.146 +/- 0.315 +/- 0.000 +/- -2.560 +/- -0.211 +/- -1.870 +/- -0.794 +/- 1.970 +/-
2.710 3.750 2.570 1.710 3.210 2.130 3.170 3.620 1.660 1.920 2.530 2.170 U U U U U U U U U U U U Zinc-65 -3.330 +/- 0.706 +/- 0.165 +/- -0.868 +/- -6.950 +/- 1.240 +/- 3.760 +/- -3.330 +/- 0.644 +/- 7.460 +/- -0.712 +/- 1.390 +/-
5.510 5.290 5.920 3.250 5.000 4.310 4.960 5.130 2.910 6.840 4.350 2.710 U U U U U U U U U UI U U Zirconium-95 2.950 +/- -1.380 +/- 3.100 +/- -1.350 +/- 0.347 +/- 1.710 +/- 0.000 +/- -0.230 +/- 0.548 +/- 3.240 +/- -2.550 +/- 2.100 +/-
3.870 4.230 3.690 2.700 4.960 3.690 4.530 4.410 3.070 3.620 3.390 2.310 U U U U U U U U U U U U arcadis.com 64
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT WATER - SURFACE: GAMMA ISOTOPIC M-8 Upstream of Plant pCi/L Jan1 Feb1 Mar Apr May Jun Jul Aug Sep Oct Nov Dec1 Barium-140 - - -2.090 +/- 7.150 +/- 6.560 +/- 4.660 +/- -62.100 +/- 6.030 +/- 5.040 +/- 2.500 +/- 45.700 +/- -
5.090 23.100 7.420 12.800 103.000 14.900 10.200 12.400 30.000 U U U U U U U U U Cerium-144 - - 1.550 +/- 2.830 +/- -4.560 +/- -2.530 +/- 6.550 +/- -7.020 +/- -2.000 +/- 24.600 +/- 1.730 +/- -
6.030 5.430 7.750 14.200 11.100 9.180 10.600 22.900 4.890 U U U U U U U UI U Cesium-134 - - 0.032 +/- 0.571 +/- -0.210 +/- -0.699 +/- -0.434 +/- 1.150 +/- 2.890 +/- -0.053 +/- 0.212 +/- -
0.963 0.714 1.180 2.160 1.880 1.820 2.740 2.560 0.731 U U U U U U U U U Cesium-137 - - 0.111 +/- 0.590 +/- 0.501 +/- 1.250 +/- 2.530 +/- -0.867 +/- 1.430 +/- 3.920 +/- 1.410 +/- -
1.020 0.726 1.160 2.450 2.630 1.600 1.890 3.840 1.270 U U U U U U U UI UI Cobalt-58 - - 0.732 +/- 0.319 +/- 0.181 +/- -2.820 +/- 1.260 +/- 0.983 +/- 0.961 +/- -1.160 +/- 0.157 +/- -
0.853 0.940 1.100 2.320 2.660 1.730 1.880 2.170 0.935 U U U U U U U U U Cobalt-60 - - 0.858 +/- -2.460 +/- -0.033 +/- -0.220 +/- -0.256 +/- 0.244 +/- 2.150 +/- 0.252 +/- 0.117 +/- -
0.916 1.690 1.110 2.320 1.890 1.600 2.110 2.430 0.672 U U U U U U U U U Iron-59 - - -1.020 +/- -0.354 +/- -2.510 +/- 0.167 +/- -0.244 +/- 1.970 +/- -1.320 +/- 1.520 +/- -1.500 +/- -
1.900 2.480 2.050 4.210 6.970 4.000 3.840 4.730 2.470 U U U U U U U U U Lanthanum- - - 0.213 +/- -3.240 +/- -1.940 +/- 1.120 +/- 13.200 +/- 5.350 +/- -0.501 +/- -2.920 +/- -2.100 +/- -
140 1.720 8.410 2.490 4.410 34.800 9.140 4.200 4.550 10.500 U U U U U U U U U Manganese- - - -0.146 +/- 0.354 +/- 0.741 +/- -2.100 +/- 0.486 +/- 1.760 +/- 0.893 +/- -0.059 +/- -0.144 +/- -
54 0.857 0.742 0.992 2.240 1.820 1.860 1.890 2.010 0.690 U U U U U U U U U Niobium-95 - - 1.580 +/- 0.495 +/- 0.814 +/- 0.836 +/- -1.240 +/- 0.425 +/- 0.616 +/- 1.150 +/- 0.129 +/- -
1.820 1.140 1.190 2.460 2.760 1.790 2.140 2.930 1.050 UI U U U U U U U U Zinc-65 - - 1.390 +/- -0.042 +/- -0.088 +/- 1.070 +/- -2.440 +/- 3.350 +/- -0.673 +/- -0.074 +/- -0.159 +/- -
1.960 1.620 2.210 5.030 4.320 3.710 4.340 4.440 1.450 U U U U U U U U U Zirconium-95 - - 1.130 +/- -0.891 +/- 0.553 +/- -2.330 +/- 3.310 +/- -2.090 +/- 0.089 +/- 1.070 +/- 1.230 +/- -
1.530 1.790 2.030 4.300 4.750 3.070 3.480 3.840 1.880 U U U U U U U U U Note:
1 Sample unavailable due to unsafe condition for sampling resulting from frozen river conditions arcadis.com 65
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT M-9 Downstream of Plant pCi/L Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec1 Barium-140 10.800 +/- 33.700 +/- -0.969 +/- -5.420 +/- 4.870 +/- 25.000 +/- -8.210 +/- 1.550 +/- 8.780 +/- -0.173 +/- 29.000 +/- 7.240 +/-
35.000 37.100 4.720 31.700 6.950 26.400 125.000 19.800 14.200 13.900 21.100 22.400 U U U U U U U U U U U U Cerium-144 3.350 +/- 6.590 +/- -2.560 +/- -0.675 +/- -0.163 +/- -3.840 +/- 13.100 +/- -0.201 +/- 2.310 +/- 16.400 +/- 2.630 +/- -8.940 +/-
7.160 7.890 5.950 6.180 6.970 16.200 13.200 7.310 13.100 16.600 4.950 12.700 U U U U U U U U U U U U Cesium-134 2.810 +/- 1.930 +/- 0.314 +/- -0.724 +/- -0.118 +/- -0.182 +/- 0.396 +/- 1.550 +/- 4.770 +/- -1.030 +/- 0.294 +/- 1.490 +/-
2.160 1.460 0.930 1.910 0.983 2.330 1.440 1.360 3.460 2.370 0.752 2.350 UI U U U U U U U UI U U U Cesium-137 0.176 +/- 0.640 +/- -1.420 +/- 1.210 +/- -1.060 +/- -0.897 +/- 0.439 +/- -0.868 +/- 0.976 +/- 2.230 +/- 0.214 +/- 0.110 +/-
1.010 3.050 2.590 2.480 1.420 2.670 2.260 2.290 2.470 2.560 0.694 2.080 U U U U U U U U U U U U Cobalt-58 0.700 +/- 0.671 +/- 0.316 +/- -0.126 +/- 0.398 +/- 0.615 +/- 0.418 +/- -0.078 +/- -1.230 +/- 0.728 +/- -0.854 +/- -0.050 +/-
1.250 1.690 0.881 1.410 1.040 1.870 1.930 1.340 2.670 2.410 1.050 1.870 U U U U U U U U U U U U Cobalt-60 0.266 +/- -0.181 +/- 0.234 +/- -0.621 +/- 0.281 +/- -0.067 +/- 0.409 +/- -0.822 +/- 1.500 +/- -0.025 +/- 0.797 +/- 2.670 +/-
2.060 1.320 0.966 1.110 0.914 2.370 1.350 1.550 2.170 2.470 0.769 2.410 U U U U U U U U U U U U Iron-59 2.380 +/- -2.850 +/- 0.893 +/- -3.840 +/- -1.430 +/- 1.760 +/- -3.110 +/- -1.630 +/- -1.110 +/- 2.450 +/- -1.390 +/- -3.240 +/-
3.270 4.470 1.830 3.300 2.000 6.210 5.190 3.190 4.390 6.900 2.380 6.100 U U U U U U U U U U U U Lanthanum- -2.650 +/- -6.590 +/- 0.332 +/- -1.210 +/- 1.440 +/- -0.500 +/- -2.720 +/- -2.360 +/- 0.808 +/- -1.270 +/- 1.470 +/- 2.940 +/-
140 12.800 14.300 1.580 10.700 2.500 5.660 28.800 4.310 3.980 3.480 6.840 8.170 U U U U U U U U U U U U Manganese- 0.038 +/- 1.240 +/- -0.755 +/- -1.860 +/- -0.479 +/- 2.410 +/- 0.200 +/- -0.239 +/- 2.690 +/- 0.111 +/- 1.670 +/- 0.964 +/-
54 0.997 1.270 0.826 1.970 0.928 1.880 1.440 1.230 3.020 1.820 0.964 1.820 U U U U U U U U U U U UI Niobium-95 -2.200 +/- 1.450 +/- 0.254 +/- 0.260 +/- 0.425 +/- 1.490 +/- 0.638 +/- 1.300 +/- 2.820 +/- 1.470 +/- 0.999 +/- 0.075 +/-
2.260 3.860 0.893 1.410 1.110 2.300 2.120 1.610 2.610 3.070 0.997 2.570 U U U U U U U U U U U U Zinc-65 -0.656 +/- -0.082 +/- -1.480 +/- 0.433 +/- -0.875 +/- 1.990 +/- 2.650 +/- -0.068 +/- 0.675 +/- 1.400 +/- 0.449 +/- 3.620 +/-
2.110 2.650 1.880 2.040 1.930 4.200 3.300 3.320 4.340 4.630 2.440 5.120 U U U U U U U U U U U U Zirconium-95 -0.530 +/- 1.810 +/- 1.150 +/- -0.167 +/- 0.456 +/- 0.675 +/- 0.217 +/- 0.168 +/- -1.430 +/- 1.990 +/- 1.120 +/- -1.220 +/-
2.630 3.200 1.510 2.470 1.770 5.530 3.790 2.640 4.650 4.060 1.730 3.960 U U U U U U U U U U U U Note:
1Q4 M9 data was collected at the beginning of January.
arcadis.com 66
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Data below were analyzed by EDC. The results reported relate only to the items tested and to the sample as received by the laboratory. The raw TLD results are corrected for individual element sensitivity and reader sensitivity and determined by QC results. Transit exposures are subtracted and the fade of the thermoluminescent response is compensated. The abbreviations common to each of the EDC analytical results tables are provided below.
Abbreviations ISFSI Independent Spent Fuel Storage Installation TLD Thermoluminescent Dosimeter mR/Std. Qtr Millirem per standard quarter (91 days) arcadis.com 67
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT DIRECT RADIATION - TLD: GAMMA mrem/91 day Qtr 1 Qtr 2 Qtr 3 Qtr 4 Control M01C Kirchenbauer Farm 11.9 +/- 0.6 13.4 +/- 0.8 13.5 +/- 0.6 15.2 +/- 1.1 M02C Cty Rd 4 & 15 12.2 +/- 0.6 12.2 +/- 1 12.7 +/- 0.5 15 +/- 0.7 M03C Cty Rd 19 & Jason Ave 13.1 +/- 0.8 14.1 +/- 0.7 15.6 +/- 0.7 16.3 +/- 0.9 M04C Maple Lake Water Tower 12.6 +/- 0.6 12.3 +/- 0.7 13.5 +/- 0.7 14.2 +/- 0.7 Inner M01A Sherburne Ave. So. 13.9 +/- 0.6 14.8 +/- 0.7 15.4 +/- 0.8 16.5 +/- 1 M02A Sherburne Ave. So. 13.8 +/- 0.9 14.3 +/- 0.5 14.7 +/- 0.8 16.4 +/- 0.8 M03A Sherburne Ave. So. 12.7 +/- 0.8 14.1 +/- 0.8 14.1 +/- 0.6 15.6 +/- 0.8 M04A Biology Station Rd. 12.5 +/- 0.5 12.9 +/- 0.5 13.7 +/- 0.8 14.9 +/- 0.8 M05A Biology Station Rd. 12.8 +/- 0.7 13.4 +/- 0.6 14.6 +/- 0.7 14.6 +/- 1 M06A Biology Station Rd. 13.7 +/- 0.6 14.8 +/- 0.8 15.2 +/- 0.7 16 +/- 0.9 M07A Parking Lot H 12.8 +/- 0.6 14.2 +/- 0.7 14.9 +/- 0.9 15.5 +/- 0.9 M08A Parking Lot F 12.9 +/- 0.6 14.3 +/- 0.8 14.9 +/- 1 15.9 +/- 0.9 M09A County Road 75 13.5 +/- 0.9 14.1 +/- 0.6 15.9 +/- 1 15.9 +/- 0.9 M10A County Road 75 12.5 +/- 0.6 14.4 +/- 0.6 14.5 +/- 0.7 16.1 +/- 1.1 M11A County Road 75 13.9 +/- 0.6 15.2 +/- 0.7 15.9 +/- 0.8 16.3 +/- 0.9 M12A County Road 75 13.2 +/- 0.5 14.3 +/- 0.6 15.6 +/- 0.7 See note 1 M13A North Boundary Rd. 13.6 +/- 0.6 14.2 +/- 0.9 13.9 +/- 0.8 15.9 +/- 1 M14A North Boundary Rd. 13.3 +/- 0.6 14.3 +/- 0.5 14.7 +/- 0.5 16.6 +/- 0.9 Outer M01B 117th Street 12.3 +/- 0.8 12.9 +/- 0.5 13.5 +/- 0.8 15.1 +/- 0.8 M02B County Road 11 14.2 +/- 1 13.5 +/- 0.7 13.5 +/- 0.7 15.6 +/- 1 M03B County Rd. 73 & 81 11.8 +/- 0.8 11.2 +/- 0.5 12.6 +/- 0.9 14 +/- 0.9 M04B County Rd. 73 (196th Street) 12.4 +/- 0.7 12.7 +/- 0.6 12.7 +/- 0.8 15 +/- 1 M05B City of Big Lake 13.3 +/- 0.7 13.1 +/- 0.5 13.7 +/- 1 16 +/- 1 M06B County Rd 14 & 196th Street 11.7 +/- 0.5 13.4 +/- 0.6 14 +/- 0.9 14.2 +/- 0.7 M07B Monticello Industrial Dr. 13.4 +/- 0.7 14.1 +/- 0.6 15.4 +/- 0.7 16.3 +/- 1 M08B Residence Hwy 25 & Davidson Ave 12.7 +/- 0.5 13.2 +/- 0.7 13.7 +/- 0.6 15.2 +/- 1 M09B Weinand Farm 13.3 +/- 0.7 15.1 +/- 0.7 See note 2 16.5 +/- 0.7 M10B Reisewitz Farm - Acacia Ave 12.6 +/- 0.7 14.5 +/- 0.7 13.5 +/- 0.9 15.5 +/- 0.9 M11B Vanlith Farm - 97th Ave 13.6 +/- 0.9 14.9 +/- 0.7 15.4 +/- 0.6 15.9 +/- 1 arcadis.com 68
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT mrem/91 day Qtr 1 Qtr 2 Qtr 3 Qtr 4 M12B Lake Maria St. Park 13.4 +/- 0.7 14.1 +/- 0.8 14.4 +/- 0.8 16.1 +/- 0.9 M13B Bridgewater Sta. 13.5 +/- 0.7 14.1 +/- 0.6 14.8 +/- 0.8 16.2 +/- 0.8 M14B Anderson Res. - Cty Rd 111 14.1 +/- 0.9 15.1 +/- 0.5 15.7 +/- 0.7 15.9 +/- 1.1 M15B Red Oak Wild Bird Farm 12.7 +/- 0.7 13.7 +/- 0.5 13.6 +/- 0.9 14.7 +/- 0.9 M16B University Ave and Hancock St, Becker 13.9 +/- 0.8 14 +/- 0.6 13.2 +/- 0.9 15.6 +/- 1.1 Special Interest M01S 127th St. NE 12.1 +/- 0.9 12.1 +/- 0.5 12.8 +/- 0.8 15.2 +/- 0.8 M02S Krone Residence 12 +/- 0.8 12 +/- 0.6 12.4 +/- 0.7 14.3 +/- 0.9 M03S Big Oaks Park 13.7 +/- 0.6 13.8 +/- 0.6 14.8 +/- 0.6 16.2 +/- 0.9 M04S Pinewood School 13.5 +/- 0.8 13.9 +/- 0.8 15.3 +/- 0.7 15 +/- 1 M05S 20500 Co. Rd 11, Big Lake 13.2 +/- 0.6 13.7 +/- 0.7 14 +/- 0.8 16.1 +/- 0.9 M06S Monticello Public Works 14.7 +/- 0.9 14.5 +/- 0.6 15.3 +/- 0.6 17 +/- 0.8 I-11 OCA Fence South, on exit road 13.5 +/- 0.7 13.8 +/- 0.6 15 +/- 0.8 15.9 +/- 0.7 I-12 OCA Fence Middle, on exit road 13.8 +/- 0.6 14 +/- 0.6 14.9 +/- 0.6 17.1 +/- 1 I-13 OCA Fence North, on exit road 14.1 +/- 0.8 14.7 +/- 0.7 15.9 +/- 0.8 16.5 +/- 1 Notes:
1 Location could not be sampled due to missing TLD (Condition Report 501000069800).
2 Location could not be sampled due to missing TLD (Condition Report 501000067454).
arcadis.com 69
2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT DIRECT RADIATION - ISFSI: GAMMA mrem/91 day Type Qtr1 Qtr2 Qtr3 Qtr4 I-01 NE corner of ISFS Gamma 35.3 +/- 1.6 37.6 +/- 1.3 42.9 +/- 2.8 44.6 +/- 2.6 I-02 North side of ISFSI, center Gamma 34.9 +/- 1.8 34.3 +/- 2.2 38.5 +/- 2 38.8 +/- 2 I-03 NW corner of ISFSI Gamma 29.1 +/- 2.8 29.4 +/- 2.8 29.5 +/- 1.4 31.2 +/- 2 I-04 West side of ISFSI, middle Gamma 70.1 +/- 4 81.3 +/- 17.8 74.7 +/- 4 80.5 +/- 5.2 I-05 West side of ISFSI, at center of array Gamma 54.8 +/- 5.7 57.6 +/- 3.7 58 +/- 5.9 55.3 +/- 4.3 I-06 SW corner of ISFSI Gamma 32.6 +/- 2.7 27.6 +/- 3.3 30 +/- 1.9 36.1 +/- 2.6 I-07 South side of ISFSI, center Gamma 37 +/- 3.7 31 +/- 1.3 37.4 +/- 2.2 38.4 +/- 4.2 I-08 SE corner of ISFSI Gamma 30.2 +/- 2.6 29.2 +/- 3.5 35.4 +/- 4.5 36.8 +/- 3.3 I-09 East side of ISFSI, at center of array Gamma 61.4 +/- 4.6 64.1 +/- 6.1 66 +/- 4.7 71.9 +/- 5 I-10 East side of ISFSI, middle Gamma 65.1 +/- 4.2 60.6 +/- 4.7 69.9 +/- 9.1 69.1 +/- 3.8 arcadis.com 70
Design & Consultancy
~ ARCADIS Ifor natural and built assets
Appendix A GEL Laboratories, LLC 2022 Annual Quality Assurance Report
t1 =I !I Laboratories LLc a member of The GEL Group INC PO Box 30712 Charleston. SC 29417 2040 Savage Road Charleston. SC 29407 P 843.556.8171 F 843.766.1178 gel.com 2022 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com
2022 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)
Approved By March 28, 2023 Robert L. Pullano Date Director, Quality Systems Revision 2 for transcription and clarification GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 2
TABLE OF CONTENTS
1. INTRODUCTION 5
2. QUALITY ASSURANCE PROGRAMS FOR INTER-LABORATORY, INTRA-LABORATORY AND THIRD PARTY CROSS-CHECK 5
3. QUALITY ASSURANCE PROGRAM FOR INTERNAL AND EXTERNAL AUDITS 7
4. PERFORMANCE EVALUATION ACCEPTANCE CRITERIA FOR ENVIRONMENTAL SAMPLE ANALYSIS 7
5. PERFORMANCE EVALUATION SAMPLES 7
6. QUALITY CONTROL PROGRAM FOR ENVIRONMENTAL SAMPLE ANALYSIS 8
7.
SUMMARY
OF DATA RESULTS 9
8.
SUMMARY
OF PARTICIPATION IN THE ECKERT & ZIEGLER ANALYTICS ENVIRONMENTAL CROSS-CHECK PROGRAM 9
9.
SUMMARY
OF PARTICIPATION IN THE MAPEP MONITORING PROGRAM 9
10.
SUMMARY
OF PARTICIPATION IN THE ERA MRAD PT PROGRAM 9
11.
SUMMARY
OF PARTICIPATION IN THE ERA PT PROGRAM 9
12. CORRECTIVE ACTION REQUEST AND REPORT (CARR) 9
13. REFERENCES 11 TABLES TABLE 1 12 TABLE OF CONTENTS (CONTINUED)
FIGURES Figure 1 Cobalt-60 Performance Evaluation Results and % Bias .......................................... 35 Figure 2 Cesium-137 Performance Evaluation Results and % Bias ...................................... 36 Figure 3 Tritium Performance Evaluation Results and % Bias ............................................... 37 Figure 4 Strontium-90 Performance Evaluation Results and % Bias ...................................... 38 Figure 5 Gross Alpha Performance Evaluation Results and % Bias ....................................... 39 Figure 6 Gross Beta Performance Evaluation Results and % Bias ........................................ 40 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 3
Figure 7 Iodine-131 Performance Evaluation Results and % Bias ......................................... 41 Figure 8 Americium-241 Performance Evaluation Results and % Bias .................................. 42 Figure 9 Plutonium-238 Performance Evaluation Results and % Bias ................................... 43 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 4
2022 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)
1. Introduction GEL Laboratories, LLC (GEL) is a privately owned environmental laboratory dedicated to providing personalized client services of the highest quality. GEL was established as an analytical testing laboratory in 1981. Now a full service lab, our analytical divisions use state of the art equipment and methods to provide a comprehensive array of organic, inorganic, and radiochemical analyses to meet the needs of our clients.
At GEL, quality is emphasized at every level of personnel throughout the company.
Managements ongoing commitment to good professional practice and to the quality of our testing services to our customers is demonstrated by their dedication of personnel and resources to develop, implement, assess, and improve our technical and management operations.
The purpose of GELs quality assurance program is to establish policies, procedures, and processes to meet or exceed the expectations of our clients. To achieve this, all personnel that support these services to our clients are introduced to the program and policies during their initial orientation, and annually thereafter during company-wide training sessions.
GELs primary goals are to ensure that all measurement data generated are scientifically and legally defensible, of known and acceptable quality per the data quality objectives (DQOs), and thoroughly documented to provide sound support for environmental decisions. In addition, GEL continues to ensure compliance with all contractual requirements, environmental standards, and regulations established by local, state and federal authorities.
GEL administers the QA program in accordance with the Quality Assurance Plan, GL-QS-B-001. Our Quality Systems include all quality assurance (QA) policies and quality control (QC) procedures necessary to plan, implement, and assess the work we perform.
GELs QA Program establishes a quality management system (QMS) that governs all of the activities of our organization.
This report entails the quality assurance program for the proficiency testing and environmental monitoring aspects of GEL for 2022 GELs QA Program is designed to monitor the quality of analytical processing associated with environmental, radiobioassay, effluent (10 CFR Part 50), and waste (10 CFR Part 61) sample analysis.
This report covers the category of Radiological Environmental Monitoring Program (REMP) and includes:
Intra-laboratory QC results analyzed during 2022.
Inter-laboratory QC results analyzed during 2022 where known values are available.
2. Quality Assurance Programs for Inter-laboratory, Intra-laboratory and Third Party Cross-Check In addition to internal and client audits, our laboratory participates in annual performance evaluation studies conducted by independent providers. We routinely participate in the following types of performance audits:
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 5
Proficiency testing and other inter-laboratory comparisons
Performance requirements necessary to retain certifications
Evaluation of recoveries of certified reference and in-house secondary reference materials using statistical process control data.
Evaluation of relative percent difference between measurements through SPC data.
We also participate in a number of proficiency testing programs for federal and state agencies and as required by contracts. It is our policy that no proficiency evaluation samples be analyzed in any special manner. Our annual performance evaluation participation generally includes a combination of studies that support the following:
US Environmental Protection Agency Discharge Monitoring Report, Quality Assurance Program (DMR-QA). Annual national program sponsored by EPA for laboratories engaged in the analysis of samples associated with the NPDES monitoring program. Participation is mandatory for all holders of NPDES permits.
The permit holder must analyze for all of the parameters listed on the discharge permit. Parameters include general chemistry, metals, BOD/COD, oil and grease, ammonia, nitrates, etc.
Department of Energy Mixed Analyte Performance Evaluation Program (MAPEP). A semiannual program developed by DOE in support of DOE contractors performing waste analyses. Participation is required for all laboratories that perform environmental analytical measurements in support of environmental management activities. This program includes radioactive isotopes in water, soil, vegetation and air filters.
ERAs MRAD-Multimedia Radiochemistry Proficiency test program. This program is for labs seeking certification for radionuclides in wastewater and solid waste. The program is conducted in strict compliance with USEPA National Standards for Water Proficiency study.
ERAs InterLaB RadCheM Proficiency Testing Program for radiological analyses.
This program completes the process of replacing the USEPA EMSL-LV Nuclear Radiation Assessment Division program discontinued in 1998. Laboratories seeking certification for radionuclide analysis in drinking water also use the study. This program is conducted in strict compliance with the USEPA National Standards for Water Proficiency Testing Studies. This program encompasses Uranium by EPA method 200.8 (for drinking water certification in Utah/Primary NELAP), gamma emitters, Gross Alpha/Beta, Iodine-131, naturally occurring radioactive isotopes, Strontium-89/90, and Tritium.
ERAs Water Pollution (WP) biannual program for waste methodologies includes parameters for both organic and inorganic analytes.
ERAs Water Supply (WS) biannual program for drinking water methodologies includes parameters for organic and inorganic analytes.
Environmental Cross-Check Program administered by Eckert & Ziegler Analytics, Inc.
This program encompasses radionuclides in water, soil, milk, naturally occurring radioactive isotopes in soil and air filters.
GEL procures single-blind performance evaluation samples from Eckert & Ziegler Analytics to verify the analysis of sample matrices processed at GEL. Samples are received on a quarterly basis. GELs Third-Party Cross-Check Program provides environmental matrices encountered in a typical nuclear utility REMP. The Third-Party Cross-Check Program is intended to meet or exceed the inter-laboratory comparison program requirements discussed in NRC Regulatory Guide 4.15. Once performance evaluation samples have been prepared in accordance with the instructions provided by GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 6
the PT provider, samples are managed and analyzed in the same manner as environmental samples from GELs clients.
3. Quality Assurance Program for Internal and External Audits During each annual reporting period, at least one internal assessment of each area of the laboratory is conducted in accordance with the pre-established schedule from Standard Operating Procedure for the Conduct of Quality Audits, GL-QS-E-001. The annual internal audit plan is reviewed for adequacy and includes the scheduled frequency and scope of quality control actions necessary to GELs QA program. Internal audits are conducted at least annually in accordance with a schedule approved by the Quality Systems Director. Supplier audits are contingent upon the categorization of the supplies and may or may not be conducted prior to the use of a supplier or subcontractor. Type I suppliers and subcontractors, regardless of how they were initially qualified, are re-evaluated at least once every three years.
In addition, prospective customers audit GEL during pre-contract audits. GEL hosts several external audits each year for both our clients and other programs. These programs include environmental monitoring, waste characterization, and radiobioassay.
The following list of programs may audit GEL at least annually or up to every three years depending on the program.
TNI, The NELAC Institute, National Environmental Laboratory Accreditation Program
DOECAP, U.S. Department of Energy Consolidated Audit Program
DOELAP, U.S. Department of Energy Laboratory Accreditation Program
DOE QSAS, U.S. Department of Energy, Quality Systems for Analytical Services
ISO/IEC 17025:2017
A2LA, American Association for Laboratory Accreditation
DoD ELAP, US Department of Defense Environmental Accreditation Program
NUPIC, Nuclear Procurement Issues Committee
South Carolina Department of Health and Environmental Control (SC DHEC)
The annual radiochemistry laboratory internal audit (22-RAD-001) was conducted in August and September, 2022. There were no findings or observations and four recommendations for improvements from this assessment.
4. Performance Evaluation Acceptance Criteria for Environmental Sample Analysis GEL utilized an acceptance protocol based upon two performance models. For those inter-laboratory programs that already have established performance criteria for bias (i.e.,
MAPEP, and ERA/ELAP), GEL will utilize the criteria for the specific program. For intra-laboratory or third party quality control programs that do not have a specific acceptance criteria (i.e. the Eckert-Ziegler Analytics Environmental Cross-check Program), results will be evaluated in accordance with GELs internal acceptance criteria.
5. Performance Evaluation Samples Performance Evaluation (PE) results and internal quality control sample results are evaluated in accordance with GEL acceptance criteria. The first criterion concerns bias, which is defined as the deviation of any one result from the known value. The second criterion concerns precision, which deals with the ability of the measurement to be replicated by comparison of an individual result with the mean of all results for a given sample set.
At GEL, we also evaluate our analytical performance on a regular basis through statistical process control (SPC) acceptance criteria. Where feasible, this criterion is applied to both measures of precision and accuracy and is specific to sample matrix. We establish environmental process control limits at least annually.
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 7
For Radiochemistry analysis, quality control evaluation is based on static limits rather than those that are statistically derived. Our current process control limits are maintained in GELs AlphaLIMS. We also measure precision with matrix duplicates and/or matrix spike duplicates. The upper and lower control limits (UCL and LCL respectively) for precision are plus or minus three times the standard deviation from the mean of a series of relative percent differences. The static precision criteria for radiochemical analyses are 0 - 20%, for activity levels exceeding the contract required detection limit (CRDL).
6. Quality Control Program for Environmental Sample Analysis GELs internal QA Program is designed to include QC functions such as instrumentation calibration checks (to insure proper instrument response), blank samples, instrumentation backgrounds, duplicates, as well as overall staff qualification analyses and statistical process controls. Both quality control and qualification analyses samples are used to be as similar as the matrix type of those samples submitted for analysis by the various laboratory clients. These performance test samples (or performance evaluation samples) are either actual sample submitted in duplicate in order to evaluate the precision of laboratory measurements, or fortified blank samples, which have been given a known quantity of a radioisotope that is in the interest to GELs clients.
Accuracy (or Bias) is measured through laboratory control samples and/or matrix spikes, as well as surrogates and internal standards. The UCLs and LCLs for accuracy are plus or minus three times the standard deviation from the mean of a series of recoveries. The static limit for most radiochemical analyses is 75 - 125%. Specific instructions for out-of-control situations are provided in the applicable analytical SOP.
GELs Laboratory Control Standard (LCS) is an aliquot of reagent water or other blank matrix to which known quantities of the method analytes are added in the laboratory. The LCS is analyzed exactly like a sample, and its purpose is to determine whether the methodology is in control, and whether the laboratory is capable of making accurate and precise measurements. Some methods may refer to these samples as Laboratory Fortified Blanks (LFB). The requirement for recovery is between 75% and 125% for radiological analyses excluding drinking water matrix.
Bias (%) = (observed concentration)
100 %
(known concentration)
Precision is a data quality indicator of the agreement between measurements of the same property, obtained under similar conditions, and how well they conform to themselves. Precision is usually expressed as standard deviation, variance or range in either absolute or relative (percentage) terms.
GELs laboratory duplicate (DUP or LCSD) is an aliquot of a sample taken from the same container and processed in the same manner under identical laboratory conditions. The aliquot is analyzed independently from the parent sample and the results are compared to measure precision and accuracy.
If a sample duplicate is analyzed, it will be reported as Relative Percent Difference (RPD). The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on
% RPD are not applicable.
Difference (%) = (high duplicate result - low duplicate result)
100 %
(average of results)
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 8
7. Summary of Data Results During 2022, forty-five (45) radioisotopes associated with seven (7) matrix types were analyzed under GELs Performance Evaluation program in participation with ERA, MAPEP, and Eckert & Ziegler Analytics. Matrix types were representative of client analyses performed during 2022. Of the four hundred sixty-four (464) total results, 97.8%
(454 of 464) were found to be acceptable within the PT providers three sigma or other statistical criteria. The list below contains the type of matrix evaluated by GEL.
Air Filter
Cartridge
Water
Milk
Soil
Liquid
Vegetation Graphs are provided in Figures 1-9 of this report to allow for the evaluation of trends or biases. These graphs include radioisotopes Cobalt-60, Cesium-137, Tritium, Strontium-90, Gross Alpha, Gross Beta, Iodine-131, Americium-241, and Plutonium-238.
8. Summary of Participation in the Eckert & Ziegler Analytics Environmental Cross-Check Program Eckert & Ziegler Analytics provided samples for one hundred nineteen (113) individual environmental analyses. The accuracy of each result reported to Eckert & Ziegler Analytics, Inc. is measured by the ratio of GELs result to the known value. All results fell within GELs acceptance criteria (100% within acceptance).
9. Summary of Participation in the MAPEP Monitoring Program MAPEP Series 46 and 47 were analyzed by the laboratory. Of the one hundred thirty-seven (137) analyses reported, 96.4% (132 out of 137) fell within the PT providers acceptance criteria.
10. Summary of Participation in the ERA MRaD PT Program The ERA MRad program provided samples (MRAD-36 and MRAD-37) for one hundred sixty-three (163) individual environmental analyses reported. Of the 171 analyses reported, 98.8% (161 of the 163) fell within the PT providers acceptance criteria.
11. Summary of Participation in the ERA PT Program The ERA program provided samples (RAD-128, RAD-129 and RAD-130) for forty-seven (47) individual environmental analyses. Of the 47 analyses, 93.6% fell within the PT providers acceptance criteria.
All corrective actions for unacceptable PTs are summarized in Table 8.
12. Corrective Action Request and Report (CARR)
There are two categories of corrective action at GEL. One is corrective action implemented at the analytical and data review level in accordance with the analytical SOP. The other is formal corrective action documented by the Quality Systems Team in accordance with GL-QS-E-002. A formal corrective action is initiated when a nonconformance reoccurs or is so significant that permanent elimination or prevention of GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 9
the problem is required. Formal corrective action investigations include root cause analysis.
GEL includes quality requirements in most analytical standard operating procedures to ensure that data are reported only if the quality control criteria are met or the quality control measures that did not meet the acceptance criteria are documented. A formal corrective action is implemented according to GL-QS-E-002 for Conducting Corrective/Preventive Action and Identifying Opportunities for Improvement. Recording and documentation is performed following guidelines stated in GL-QS-E-012 for Client NCR Database Operation.
Any employee at GEL can identify and report a nonconformance and request that corrective action be taken. Any GEL employee can participate on a corrective action team as requested by the QS team or Group Leaders. The steps for conducting corrective action are detailed in GL-QS-E-002. In the event that correctness or validity of the laboratorys test results in doubt, the laboratory will take corrective action. If investigations show that the results have been impacted, affected clients will be informed of the issue in writing within five (5) calendar days of the discovery.
Table 8 provides the status of CARRs for radiological performance testing during 2022.
It has been determined that causes of the unacceptable results did not impact any data reported to our clients.
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 10
13. References
1. GEL Quality Assurance Plan, GL-QS-B-001
2. GEL Standard Operating Procedure for the Conduct of Quality Audits, GL-QS-E-001
3. GEL Standard Operating Procedure for Conducting Corrective/Preventive Action and Identifying Opportunities for Improvement, GL-QS-E-002
4. GEL Standard Operating Procedure for AlphaLIMS Documentation of Nonconformance Reporting and Dispositioning and Control of Nonconforming Items, GL-QS-E-004
5. GEL Standard Operating Procedure for Handling Proficiency Evaluation Samples, GL-QS-E-013
6. GEL Standard Operating Procedure for Quality Assurance Measurement Calculations and Processes, GL-QS-E-014
7. 40 CFR Part 136 Guidelines Establishing Test Procedures for the Analysis of Pollutants
8. ISO/IEC 17025-2017, General Requirements for the Competence of Testing and Calibration Laboratories
9. ANSI/ASQC E4-1994, Specifications and Guidelines for Quality Systems for Environmental Data Collection and Environmental Technology Programs, American National Standard
10. 2016 TNI Standard, The NELAC Institute, National Environmental Accreditation Program
11. MARLAP, Multi-Agency Radiological Laboratory Analytical Protocols
12. 10 CFR Part 21, Reporting of Defects and Noncompliance
13. 10 CFR Part 50 Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants
14. 10 CFR Part 61, Licensing Requirements for Land Disposal and Radioactive Waste
15. NRC REG Guide 4.15 and NRC REG Guide 4.8 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 11
TABLE 1 2022 RADIOLOGICAL PROFICIENCY TESTING RESULTS AND ACCEPTANCE CRITERIA Report PT Closing /
Provide Quarter Receive Sample Sample Reporte Assigne Acceptance Performanc r / Year d Date Number Media Units Analyte d Value d Value Limits e Evaluation 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Barium-133 65.2 63 52.4 - 69.4 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Cesium-134 81.9 84.9 69.6 - 93.4 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Cesium-137 29.5 29.3 25.2 - 35.3 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Cobalt-60 112 102 91.8 - 114 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Zinc-65 345 312 281 - 364 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Gross Alpha 32.1 32.5 16.6 - 42.1 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Gross Alpha 32.2 32.5 16.6 - 42.1 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Gross Beta 63.8 68.3 47.4 - 75.1 Acceptable 2/28/202 Not ERA 1st/2022 2 RAD-128 Water pCi/L Radium-226 12.6 9.53 7.14 - 11.1 Acceptable 2/28/202 Not ERA 1st/2022 2 RAD-128 Water pCi/L Radium-228 11.5 8.71 5.59 - 11.0 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Uranium (Nat) 66.3 69 56.4 - 75.9 Acceptable 2/28/202 Uranium ERA 1st/2022 2 RAD-128 Water µg/L (mass) 109.74 101 82.5 - 111 Acceptable 2/28/202 Uranium ERA 1st/2022 2 RAD-128 Water µg/L (mass) 109.74 101 82.5 - 111 Acceptable 2/28/202 Uranium ERA 1st/2022 2 RAD-128 Water µg/L (mass) 109.74 101 82.5 - 111 Acceptable 2/28/202 19500 -
ERA 1st/2022 2 RAD-128 Water pCi/L Tritium 21500 22200 24400 Acceptable 2/28/202 19500 -
ERA 1st/2022 2 RAD-128 Water pCi/L Tritium 21200 22200 24400 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Strontium-89 72.8 65 52.7 - 73.0 Acceptable 2/28/202 Not ERA 1st/2022 2 RAD-128 Water pCi/L Strontium-89 77.7 65 52.7 - 73.0 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Strontium-90 43.7 40.8 30.0 - 46.9 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Strontium-90 42.6 40.8 30.0 - 46.9 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Iodine-131 18.8 21.1 17.5 - 25.3 Acceptable 2/28/202 ERA 1st/2022 2 RAD-128 Water pCi/L Iodine-131 23.7 21.1 17.5 - 25.3 Acceptable 2nd/202 5/25/202 ERA 1 1 RAD 125 Water pCi/L Radium-226 14.2 19.3 14.3 - 22.0 Acceptable 2nd/202 5/25/202 ERA 1 1 RAD 125 Water pCi/L Radium-228 9.98 10.3 6.71 - 12.8 Acceptable 2nd/202 5/25/202 ERA 1 1 RAD 125 Water pCi/L Strontium-89 59.3 63.5 51.4 - 71.5 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Actinium-228 1710 1670 1100 - 2100 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Bismuth-212 2130 1840 527 - 2740 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Bismuth-214 888 790 379 - 1180 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Cesium-134 6470 6620 4530 - 7910 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Cesium-134 6470 6620 4530 - 7910 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Cesium-137 7680 6760 5110 - 8550 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Cobalt-60 3110 2820 2220 - 3480 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Lead-212 1880 1630 1140 - 2060 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Lead-214 1090 838 352 - 1320 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Manganese-54 <24.3 <555 <555 Acceptable ERA 2nd/202 5/27/202 MRAD-36 Soil pCi/kg Plutonium-238 260 289 144 - 439 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 12
2 2 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Plutonium-239 1290 1180 643 - 1700 Acceptable 2nd/202 5/27/202 26100 -
ERA 2 2 MRAD-36 Soil pCi/kg Potassium-40 40500 37900 45300 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Strontium-90 7090 6720 2090 - 10500 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Thorium-234 4900 3390 1280 - 5810 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-234 3830 3410 1600 - 4470 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-234 4120 3410 1600 - 4470 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-234 3830 3410 1600 - 4470 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-238 4080 3390 1860 - 4550 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-238 4060 3390 1860 - 4550 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-Total 8170 6960 3860 - 9000 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-Total 8366 6960 3860 - 9000 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Uranium-Total 8170 6960 3860 - 9000 Acceptable 2nd/202 5/27/202 Uranium ERA 2 2 MRAD-36 Soil µg/kg (mass) 12300 10100 4560 - 13600 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Zinc-65 6450 5070 4050 - 6920 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Americium-241 1670 1850 1140 - 2610 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Soil pCi/kg Cesium-134 1900 2450 1630 - 3260 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Cesium-137 1330 1460 1120 - 1970 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Cesium-137 1330 1460 1120 - 1970 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Cobalt-60 822 902 708 - 1180 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Curium-244 1270 1530 863 - 1900 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Manganese-54 <25.2 <207 <207 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Plutonium-238 3470 3640 2520 - 4690 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Plutonium-239 3400 3540 2450 - 4480 Acceptable 2nd/202 5/27/202 25000 -
ERA 2 2 MRAD-36 veg pCi/kg Potassium-40 32400 33300 42200 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Strontium-90 5170 4340 2450 - 5660 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Uranium-234 3750 3980 2800 - 5080 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Uranium-238 3850 3940 2780 - 4930 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Uranium-Total 7800 8110 5180 - 10900 Acceptable 2nd/202 5/27/202 Uranium ERA 2 2 MRAD-36 veg µg/kg (mass) 11500 11800 9060 - 14600 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 veg pCi/kg Zinc-65 564 545 407 - 808 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Americium-241 22.6 21 15.0 - 28.0 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Cesium-134 497 549 356 - 673 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Cesium-137 1320 1320 1080 - 1730 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Cobalt-60 905 885 752 - 1120 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Iron-55 110 127 46.4 - 203 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Manganese-54 <4.39 <35.0 <35.0 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Plutonium-238 27.1 29.6 22.3 - 36.4 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Plutonium-239 44.5 49.7 37.2 - 60.0 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Strontium-90 38 31.1 19.7 - 42.3 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Uranium-234 59.1 67.3 49.9 - 78.9 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Uranium-234 62.3 67.3 49.9 - 78.9 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 13
2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Uranium-238 61.5 66.7 50.4 - 79.6 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Uranium-238 63.6 66.7 50.4 - 79.6 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Uranium-Total 124 137 100 - 162 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Uranium-Total 128.9 137 100 - 162 Acceptable 2nd/202 5/27/202 Uranium ERA 2 2 MRAD-36 Filter µg/Filter (mass) 184 200 160 - 234 Acceptable 2nd/202 5/27/202 Uranium ERA 2 2 MRAD-36 Filter µg/Filter (mass) 190 200 160 - 234 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Zinc-65 730 671 550 - 1030 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Zinc-65 730 671 550 - 1030 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Gross Alpha 98.4 94.2 49.2 - 155 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Filter pCi/Filter Gross Beta 71.5 66.8 40.5 - 101 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Americium-241 65 74.6 51.2 - 95.4 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cesium-134 1620 1720 1300 - 1890 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cesium-134 1620 1720 1300 - 1890 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cesium-134 1620 1720 1300 - 1890 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cesium-137 1130 1120 959 - 1270 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cesium-137 1130 1120 959 - 1270 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cesium-137 1130 1120 959 - 1270 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Cobalt-60 2880 2710 2340 - 3110 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Iron-55 1270 1140 670 - 1660 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Manganese-54 <8.37 <71.0 <71.0 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Plutonium-238 116 147 88.4 - 190 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Plutonium-239 56 71.9 44.5 - 88.6 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Strontium-90 639 628 452 - 776 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Uranium-234 41.2 44.1 33.6 - 50.4 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Uranium-234 44 44.1 33.6 - 50.4 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Uranium-238 44.7 43.7 33.9 - 51.4 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Uranium-238 43.5 43.7 33.9 - 51.4 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Uranium-Total 88.9 89.8 70.0 - 102 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Uranium-Total 89.5 89.8 70.0 - 102 Acceptable 2nd/202 5/27/202 Uranium ERA 2 2 MRAD-36 Water µg/L (mass) 134 131 106 - 149 Acceptable 2nd/202 5/27/202 Uranium ERA 2 2 MRAD-36 Water µg/L (mass) 130 131 106 - 149 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Zinc-65 1320 1220 1090 - 1540 Acceptable 2nd/202 5/27/202 ERA 2 2 MRAD-36 Water pCi/L Gross Alpha 74.5 79.4 29.0 - 109 Acceptable 2nd/202 5/27/202 21300 -
ERA 2 2 MRAD-36 Water pCi/L Tritium 28000 28200 34300 Acceptable 2nd/202 5/23/202 ERA 2 2 RAD -129 Water pCi/L Radium-226 8.15 9.46 7.09 - 11.1 Acceptable 2nd/202 5/23/202 ERA 2 2 RAD -129 Water pCi/L Radium-228 3.06 3.18 1.71 - 4.63 Acceptable 2nd/202 5/23/202 ERA 2 2 RAD -129 Water pCi/L Strontium-89 67.6 67.9 55.3 - 76.1 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Barium-133 40.1 38.2 30.9 - 42.8 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Cesium-134 84.7 88.6 72.7 - 97.5 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Cesium-137 177 170 153 - 189 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Cesium-137 177 170 153 - 189 Acceptable ERA 3rd 08/29/22 RAD-130 Water pCi/L Cobalt-60 79 72.4 65.2 - 82.1 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 14
/2022 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Zinc-65 363 326 293 - 380 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Gross Alpha 54.3 60.2 31.5 - 74.8 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Gross Alpha 58.8 60.2 31.5 - 74.8 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Gross Alpha 58.8 60.2 31.5 - 74.8 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Gross Beta 22.5 17.7 10.1 - 25.9 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Gross Beta 22.5 17.7 10.1 - 25.9 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Radium-226 12.1 13.1 9.77 - 15.1 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Radium-228 8.05 8.4 5.38 - 10.6 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Radium-228 7.91 8.4 5.38 - 10.6 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Uranium (Nat) 53.6 54 44.0 - 59.5 Acceptable 3rd Uranium ERA /2022 08/29/22 RAD-130 Water µg/L (mass) 74.525 78.8 64.2 - 86.8 Acceptable 3rd 19400 -
ERA /2022 08/29/22 RAD-130 Water pCi/L Tritium 20200 22100 24300 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Strontium-89 48.4 49.6 39.0 - 57.0 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Strontium-89 47.4 49.6 39.0 - 57.0 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Strontium-90 12.8 11.2 7.62 - 13.8 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Strontium-90 11.9 11.2 7.62 - 13.8 Acceptable 3rd ERA /2022 08/29/22 RAD-130 Water pCi/L Iodine-131 28.9 27.7 23.0 - 32.5 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Actinium-228 1550 1670 1100 - 2100 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Americium-241 187 147 79.4 - 208 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Bismuth-212 1460 1670 478 - 2490 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Bismuth-214 592 790 379 - 1180 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Bismuth-214 592 790 379 - 1180 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Cesium-134 8710 9600 6560 - 11500 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Cesium-137 8080 7890 5970 - 9980 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Cobalt-60 1490 1500 1180 - 1850 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Lead-212 1820 1630 1140 - 2060 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Lead-214 735 838 352 - 1320 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Manganese-54 <32.1 <555 <555 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Plutonium-238 1100 1100 549 - 1670 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Plutonium-239 948 967 527 - 1390 Acceptable 29700 -
ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Potassium-40 41300 43100 51500 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Strontium-90 5310 6270 1950 - 9770 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Thorium-234 3920 3320 1250 - 5690 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Uranium-234 3410 3350 1570 - 4390 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Uranium-234 3640 3350 1570 - 4390 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Uranium-238 3880 3320 1820 - 4460 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Uranium-Total 7520 6830 3790 - 8830 Acceptable Uranium ERA 4th/2022 11/21/22 MRAD-37 Soil µg/kg (mass) 11600 9960 4490 - 13400 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Soil pCi/kg Zinc-65 4300 3990 3190 - 5440 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Americium-241 3650 3560 2200 - 5030 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Cesium-134 1820 1860 1230 - 2480 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Cesium-137 2560 2300 1770 - 3100 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Cobalt-60 528 496 389 - 648 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Curium-244 957 1100 620 - 1370 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Manganese-54 <27.4 <207 <207 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Plutonium-238 1320 1300 900 - 1680 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Plutonium-239 1190 1170 809 - 1480 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 15
Vegetatio Not ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Strontium-90 4560 2960 1670 - 3860 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Uranium-234 1090 1090 766 - 1390 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Uranium-238 1100 1080 763 - 1350 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Uranium-Total 2230 2220 1420 - 2990 Acceptable Vegetatio Uranium ERA 4th/2022 11/21/22 MRAD-37 n µg/kg (mass) 3300 3240 2490 - 4010 Acceptable Vegetatio ERA 4th/2022 11/21/22 MRAD-37 n pCi/kg Zinc-65 665 512 382 - 759 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Americium-241 41.2 38.8 27.7 - 51.7 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Cesium-134 286 325 211 - 399 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Cesium-137 739 795 653 - 1040 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Cobalt-60 203 191 162 - 243 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Iron-55 107 122 44.5 - 195 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Manganese-54 <2.38 <35.0 <35.0 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Plutonium-238 29.9 29.9 22.6 - 36.7 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Plutonium-239 12.1 13 9.73 - 15.7 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Strontium-90 130 133 84.1 - 181 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Uranium-234 68.1 71.5 53.0 - 83.8 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Uranium-234 69.9 71.5 53.0 - 83.8 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Uranium-238 70.1 70.9 53.5 - 84.6 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Uranium-238 72.3 70.9 53.5 - 84.6 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Uranium-Total 141 146 107 - 173 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Uranium-Total 142.2 146 107 - 173 Acceptable Uranium ERA 4th/2022 11/21/22 MRAD-37 Filter µg/Filter (mass) 210 212 170 - 248 Acceptable Uranium ERA 4th/2022 11/21/22 MRAD-37 Filter µg/Filter (mass) 216 212 170 - 248 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Zinc-65 133 120 98.4 - 183 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Gross Alpha 57.8 55.5 29.0 - 91.4 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Filter pCi/Filter Gross Beta 68.2 64.8 39.3 - 97.9 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Americium-241 100 96.2 66.0 - 123 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Cesium-134 452 483 365 - 531 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Cesium-137 1220 1250 1070 - 1420 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Cobalt-60 1500 1420 1220 - 1630 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Iron-55 867 926 544 - 1350 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Manganese-54 <5.46 <71.0 <71.0 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Plutonium-238 44.5 52.6 31.6 - 68.2 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Plutonium-239 94.4 117 72.5 - 144 Acceptable Not ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Strontium-90 283 224 161 - 277 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Uranium-234 140 153 116 - 175 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Uranium-234 145 153 116 - 175 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Uranium-238 147 152 118 - 179 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Uranium-238 156 152 118 - 179 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Uranium-Total 296 312 243 - 356 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Uranium-Total 301 312 243 - 356 Acceptable Uranium ERA 4th/2022 11/21/22 MRAD-37 Water µg/L (mass) 442 455 369 - 516 Acceptable Uranium ERA 4th/2022 11/21/22 MRAD-37 Water µg/L (mass) 468 455 369 - 516 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Zinc-65 145 122 109 - 154 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Gross Alpha 46.6 42.7 15.6 - 58.9 Acceptable ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Gross Beta 93.6 111 55.5 - 153 Acceptable 14200 -
ERA 4th/2022 11/21/22 MRAD-37 Water pCi/L Tritium 16900 18800 22900 Acceptable 8.98E+0 EZA 1st/2022 05/20/22 E13655 Cartridge pCi Iodine-131 1 8.72E+01 1.03 Acceptable 9.30E+0 EZA 1st/2022 05/20/22 E13656 Milk pCi/L Strontium-89 1 9.68E+01 0.96 Acceptable 8.41E+0 EZA 1st/2022 05/20/22 E13656 Milk pCi/L Strontium-90 0 1.26E+01 0.67 Acceptable 8.31E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cerium-141 1 6.46E+01 1.29 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cobalt-58 1.66E+0 1.64E+02 1.04 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 16
2 2.96E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cobalt-60 2 3.02E+02 0.98 Acceptable 3.92E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Chromium-51 2 3.39E+02 1.16 Acceptable 1.68E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cesium-134 2 1.82E+02 0.92 Acceptable 2.41E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cesium-137 2 2.23E+02 1.08 Acceptable 1.76E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Manganese-54 2 1.64E+02 1.07 Acceptable 1.91E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Iron-59 2 1.85E+02 1.03 Acceptable 1.19E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Iodine-131 2 9.67E+01 1.23 Acceptable 2.62E+0 EZA 1st/2022 05/20/22 E13657 Milk pCi/L Zinc-65 2 2.46E+02 1.06 Acceptable 7.12E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Cerium-141 1 7.61E+01 0.94 Acceptable 2.05E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Cobalt-58 2 1.93E+02 1.06 Acceptable 3.79E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Cobalt-60 2 3.55E+02 1.07 Acceptable 2.00E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Cesium-134 2 2.14E+02 0.93 Acceptable 2.65E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Cesium-137 2 2.63E+02 1.01 Acceptable 9.35E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Iodine-131 1 8.76E+01 1.07 Acceptable 2.39E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Iron-59 2 2.18E+02 1.10 Acceptable 2.07E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Manganese-54 2 1.93E+02 1.07 Acceptable 3.25E+0 EZA 1st/2022 05/20/22 E13658 Water pCi/L Zinc-65 2 2.90E+02 1.12 Acceptable 2nd/202 8.77E+0 EZA 2 08/24/22 E13659 Cartridge pCi Iodine-131 1 8.53E+01 1.03 Acceptable 2nd/202 6.76E+0 EZA 2 08/24/22 E13660 Milk pCi/L Strontium-89 1 8.72E+01 0.78 Acceptable 2nd/202 1.07E+0 EZA 2 08/24/22 E13660 Milk pCi/L Strontium-90 1 1.45E+01 0.74 Acceptable 2nd/202 1.68E+0 EZA 2 08/24/22 E13361 Milk pCi/L Cerium-141 2 1.71E+02 0.98 Acceptable 2nd/202 1.51E+0 EZA 2 08/24/22 E13361 Milk pCi/L Cobalt-58 2 1.59E+02 0.95 Acceptable 2nd/202 3.04E+0 EZA 2 08/24/22 E13361 Milk pCi/L Cobalt-60 2 2.99E+02 1.02 Acceptable 2nd/202 4.53E+0 EZA 2 08/24/22 E13361 Milk pCi/L Chromium-51 2 4.25E+02 1.07 Acceptable 2nd/202 1.92E+0 EZA 2 08/24/22 E13361 Milk pCi/L Cesium-134 2 2.12E+02 0.91 Acceptable 2nd/202 2.51E+0 EZA 2 08/24/22 E13361 Milk pCi/L Cesium-137 2 2.52E+02 1.00 Acceptable 2nd/202 2.29E+0 EZA 2 08/24/22 E13361 Milk pCi/L Iron-59 2 1.94E+02 1.18 Acceptable 2nd/202 8.45E+0 EZA 2 08/24/22 E13361 Milk pCi/L Iodine-131 1 9.05E+01 0.93 Acceptable 2nd/202 2.95E+0 EZA 2 08/24/22 E13361 Milk pCi/L Manganese-54 2 2.83E+02 1.04 Acceptable 2nd/202 3.90E+0 EZA 2 08/24/22 E13361 Milk pCi/L Zinc-65 2 3.66E+02 1.07 Acceptable 2nd/202 1.54E+0 EZA 2 08/24/22 E13662 Water pCi/L Cerium-141 2 1.39E+02 1.11 Acceptable 2nd/202 1.38E+0 EZA 2 08/24/22 E13662 Water pCi/L Cobalt-58 2 1.28E+02 1.07 Acceptable 2nd/202 2.58E+0 EZA 2 08/24/22 E13662 Water pCi/L Cobalt-60 2 2.42E+02 1.07 Acceptable 2nd/202 3.66E+0 EZA 2 08/24/22 E13662 Water pCi/L Chromium-51 2 3.44E+02 1.06 Acceptable 2nd/202 1.68E+0 EZA 2 08/24/22 E13662 Water pCi/L Cesium-134 2 1.72E+02 0.98 Acceptable 2nd/202 2.12E+0 EZA 2 08/24/22 E13662 Water pCi/L Cesium-137 2 2.04E+02 1.04 Acceptable 2nd/202 1.71E+0 EZA 2 08/24/22 E13662 Water pCi/L Iron-59 2 1.57E+02 1.09 Acceptable 2nd/202 8.47E+0 EZA 2 08/24/22 E13662 Water pCi/L Iodine-131 1 9.12E+01 0.93 Acceptable 2nd/202 2.57E+0 EZA 2 08/24/22 E13662 Water pCi/L Manganese-54 2 2.29E+02 1.12 Acceptable 2nd/202 3.09E+0 EZA 2 08/24/22 E13662 Water pCi/L Zinc-65 2 2.96E+02 1.04 Acceptable 2nd/202 8.77E+0 EZA 2 06/16/22 E13659 Cartridge pCi Iodine-131 1 8.53E+01 103 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 17
2nd/202 6.76E+0 EZA 2 06/16/22 E13660 Milk pCi/L Strontium-89 1 8.72E+01 0.78 Acceptable 2nd/202 1.07E+0 EZA 2 06/16/22 E13660 Milk pCi/L Strontium-90 1 1.45E+01 0.74 Acceptable 2nd/202 1.68E+0 EZA 2 06/16/22 E13661 Milk pCi/L Cerium-141 2 1.71E+02 0.98 Acceptable 2nd/202 1.51E+0 EZA 2 06/16/22 E13661 Milk pCi/L Cobalt-58 2 1.59E+02 0.95 Acceptable 2nd/202 3.04E+0 EZA 2 06/16/22 E13661 Milk pCi/L Cobalt-60 2 2.99E+02 1.02 Acceptable 2nd/202 4.53E+0 EZA 2 06/16/22 E13661 Milk pCi/L Chromium-51 2 4.25E+02 1.07 Acceptable 2nd/202 1.92E+0 EZA 2 06/16/22 E13661 Milk pCi/L Cesium-134 2 2.12E+02 0.91 Acceptable 2nd/202 2.51E+0 EZA 2 06/16/22 E13661 Milk pCi/L Cesium-137 2 2.52E+02 1.00 Acceptable 2nd/202 2.95E+0 EZA 2 06/16/22 E13661 Milk pCi/L Manganese-54 2 2.83E+02 1.02 Acceptable 2nd/202 2.29E+0 EZA 2 06/16/22 E13661 Milk pCi/L Iron-59 2 1.94E+02 1.18 Acceptable 2nd/202 8.45E+0 EZA 2 06/16/22 E13661 Milk pCi/L Iodine-131 1 9.05E+01 0.93 Acceptable 2nd/202 3.90E+0 EZA 2 06/16/22 E13661 Milk pCi/L Zinc-65 2 3.66E+02 1.07 Acceptable 2nd/202 1.54E+0 EZA 2 06/16/22 E13662 Water pCi/L Cerium-141 2 1.39E+02 1.11 Acceptable 2nd/202 1.38E+0 EZA 2 06/16/22 E13662 Water pCi/L Cobalt-58 2 1.28E+02 1.07 Acceptable 2nd/202 2.58E+0 EZA 2 06/16/22 E13662 Water pCi/L Cobalt-60 2 2.42E+02 1.07 Acceptable 2nd/202 1.68E+0 EZA 2 06/16/22 E13662 Water pCi/L Cesium-134 2 1.72E+02 0.98 Acceptable 2nd/202 2.12E+0 EZA 2 06/16/22 E13662 Water pCi/L Cesium-137 2 2.04E+02 1.04 Acceptable 2nd/202 8.47E+0 EZA 2 06/16/22 E13662 Water pCi/L Iodine-131 1 9.12E+01 0.93 Acceptable 2nd/202 1.71E+0 EZA 2 06/16/22 E13662 Water pCi/L Iron-59 2 1.57E+02 1.09 Acceptable 2nd/202 2.57E+0 EZA 2 06/16/22 E13662 Water pCi/L Manganese-54 2 2.29E+02 1.12 Acceptable 2nd/202 3.09E+0 EZA 2 06/16/22 E13662 Water pCi/L Zinc-65 2 2.96E+02 1.04 Acceptable 7.97E+0 EZA 3rd/2022 11/22/22 E13663 Cartridge pCi Iodine-131 1 8.35E+01 0.95 Acceptable 9.54E+0 EZA 3rd/2022 11/22/22 E13664 Milk pCi/L Strontium-89 1 8.91E+01 1.07 Acceptable 8.87E+0 EZA 3rd/2022 11/22/22 E13664 Milk pCi/L Strontium-90 0 1.36E+01 0.65 Acceptable 1.52E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cerium-141 2 1.61E+02 0.94 Acceptable 1.87E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cobalt-58 2 1.89E+02 0.99 Acceptable 2.65E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cobalt-60 2 2.60E+02 1.02 Acceptable 4.63E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Chromium-51 2 4.56E+02 1.02 Acceptable 2.31E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cesium-134 2 2.52E+02 0.92 Acceptable 2.24E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cesium-137 2 2.22E+02 1.01 Acceptable 1.91E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Iron-59 2 1.73E+02 1.10 Acceptable 9.28E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Iodine-131 1 9.42E+01 0.99 Acceptable 2.97E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Manganese-54 2 2.82E+02 1.05 Acceptable 3.98E+0 EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Zinc-65 2 3.73E+02 1.07 Acceptable 1.29E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cerium-141 2 1.26E+02 1.02 Acceptable 1.49E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cobalt-58 2 1.48E+02 1.01 Acceptable 2.17E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cobalt-60 2 2.04E+02 1.07 Acceptable 3.84E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Chromium-51 2 3.57E+02 1.07 Acceptable 1.84E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cesium-134 2 1.98E+02 0.93 Acceptable 1.79E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cesium-137 2 1.74E+02 1.03 Acceptable 1.57E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Iron-59 2 1.36E+02 1.16 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Iodine-131 8.96E+0 8.80E+01 1.02 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 18
1 2.30E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Manganese-54 2 2.21E+02 1.04 Acceptable 3.42E+0 EZA 3rd/2022 11/22/22 E13666 Water pCi/L Zinc-65 5 2.93E+02 1.17 Acceptable 8.96E+0 EZA 4th/2022 2/15/23 E13667 Cartridge pCi Iodine-131 1 9.18E+01 0.98 Acceptable 9.93E+0 EZA 4th/2022 2/15/23 E13668 Milk pCi/L Strontium-89 1 9.04E+01 1.10 Acceptable 1.28E+0 EZA 4th/2022 2/15/23 E13668 Milk pCi/L Strontium-90 1 1.50E+01 0.86 Acceptable 2.32E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cerium-141 2 2.25E+02 1.03 Acceptable 2.35E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cobalt-58 2 2.30E+02 1.02 Acceptable 2.85E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cobalt-60 2 2.90E+02 0.98 Acceptable 4.62E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Chromium-51 2 4.64E+02 0.99 Acceptable 1.76E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cesium-134 2 1.91E+02 0.92 Acceptable 2.16E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cesium-137 2 2.19E+02 0.99 Acceptable 2.31E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Iron-59 2 1.98E+02 1.17 Acceptable 1.02E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Iodine-131 2 9.51E+01 1.07 Acceptable 2.64E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Manganese-54 2 2.52E+02 1.05 Acceptable 3.50E+0 EZA 4th/2022 2/15/23 E13669 Milk pCi/L Zinc-65 2 3.05E+02 1.15 Acceptable 2.33E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Cerium-141 2 2.24E+02 1.04 Acceptable 2.54E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Cobalt-58 2 2.29E+02 1.07 Acceptable 2.97E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Cobalt-60 2 2.89E+02 1.03 Acceptable 5.24E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Chromium-51 2 4.62E+02 1.13 Acceptable 1.71E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Cesium-134 2 1.91E+02 0.90 Acceptable 2.17E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Cesium-137 2 2.18E+02 1.00 Acceptable 2.32E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Iron-59 2 1.97E+02 1.18 Acceptable 9.96E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Iodine-131 1 9.63E+01 1.03 Acceptable 2.72E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Manganese-54 2 2.51E+02 1.08 Acceptable 3.36E+0 EZA 4th/2022 2/15/23 E13670 Water pCi/L Zinc-65 2 3.04E+02 1.11 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 GrF46 Filter Bq/smpl Gross Alpha 0.864 1.77 0.53-3.01 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 GrF46 Filter Bq/smpl Gross Beta 0.639 0.649 0.325-0.974 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 GrW46 Water Bq/L Gross Alpha 0.782 0.87 0.26-1.48 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 GrW46 Water Bq/L Gross Beta 2.40 2.50 1.25-3.75 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Americium-241 56.2 72 50.4-93.6 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Cesium-134 741 890 623-1157 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Cesium-137 369 365 256-475 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Cobalt-57 1450 1400 980-1820 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Cobalt-60 411 443 310-576 Acceptable 2nd/202 MAPEP Not MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Iron-55 725 1100 770-1430 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Manganese-54 1140 1140 798-1482 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg 766 780 546-1014 482-896 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Plutonium-238 54.2 56 39.2-72.8 Acceptable 2nd/202 MAPEP Plutonium-MAPEP 2 06/15/22 MaS46 Soil Bq/Kg 239/240 41.1 41 28.7-53.3 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Potassium-40 598 596 417-775 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Strontium-90 560 677 474-880 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 19
2nd/202 MAPEP Not MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Technetium-99 506 778 545-1011 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Thorium 228 45.8 43 30-56 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Thorium 230 49 38 27-49 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Thorium 232 39.5 42 29-55 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg U-234/233 46 44 30.8-57.2 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Uranium-238 126 123 86-160 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaS46 Soil Bq/Kg Zinc-65 -0.659 False pos. test Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Americium-241 0.271 0.335 0.249-0.462 Acceptable 2nd/202 MAPEP False pos.
MAPEP 2 06/15/22 MaW46 Water Bq/L Cesium-134 -0.0355 test Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Cesium-137 7.9 7.64 5.35-9.93 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Cobalt-57 37 36 25.2-46.8 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Cobalt-60 9.64 9.3 6.5-12.1 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Hydrogen-3 303 300 210-390 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Iron-55 27.1 26.9 18.8-35.0 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Manganese-54 19.8 18.9 13.2-24.6 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Nickel-63 31.7 34 23.8-44.2 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Plutonium-238 0.992 1.07 0.75-1.39 Acceptable 2nd/202 MAPEP Plutonium-MAPEP 2 06/15/22 MaW46 Water Bq/L 239/240 1.07 1.19 0.83-1.55 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Potassium-40 -875 False pos. test Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Radium-226 0.871 0.8 0.6-1.0 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Strontium-90 14.9 12.9 5.5-10.3 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Technetium-99 7.89 7.9 5.5-10.3 Acceptable 2nd/202 MAPEP Uranium-MAPEP 2 06/15/22 MaW46 Water Bq/L 234/233 1.52 1.5 1.1-2.0 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Uranium-238 1.55 1.54 1.08-2.00 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 MaW46 Water Bq/L Zinc-65 29.3 26.2 18.3-34.1 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter ug/smpl Uranium-235 0.0407 0.041 0.029-0.053 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter ug/smpl Uranium-238 5.8 5.35 3.75-6.96 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter ug/smpl Uranium-Total 5.84 5.4 3.8-7.0 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Americium-241 0.0392 0.0439 0.307-0.0571 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Cesium-134 0.936 0.93 0.65-1.21 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Cesium-137 0.759 0.726 0.0508-0.944 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Cobalt-57 0 False pos. test Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Cobalt-60 0.831 0.72 0.50-0.84 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Manganese-54 0.00527 False pos. test Acceptable 2nd/202 MAPEP 0.0155-MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Plutonium-238 0.0212 0.0221 0.0287 Acceptable 2nd/202 MAPEP Plutonium- 0.0099-MAPEP 2 06/15/22 RdF46 Filter Bq/smpl 239/240 0.0142 0.0141 0.0183 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Strontium-90 0.5 0.54 0.38-0.70 Acceptable 2nd/202 MAPEP Uranium-MAPEP 2 06/15/22 RdF46 Filter Bq/smpl 234/233 0.063 0.06 0.045-0.083 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Uranium-238 0.0685 0.067 0.047-0.087 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdF46 Filter Bq/smpl Zinc-65 0.0755 False pos. test Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Americium-241 0.0892 0.101 0.071-0.131 Acceptable Not MAPEP 2nd/202 06/15/22 MAPEP veg Bq/smpl Cesium-134 7.04 7.61 5.33-9.89 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 20
2 RdV46 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Cesium-137 1.57 1.52 1.06-1.98 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Cobalt-57 5.06 5.09 3.56-6.62 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Cobalt-60 -0.077 2.09-3.89 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Manganese-54 2.7 2.59 1.81-3.37 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Plutonium-238 0.267 0.27 0.019-0.035 Acceptable 2nd/202 MAPEP Plutonium- 0.0416-MAPEP 2 06/15/22 RdV46 veg Bq/smpl 239/240 0.625 0.0594 0.0772 Acceptable 2nd/202 MAPEP Not MAPEP 2 06/15/22 RdV46 veg Bq/smpl Strontium-90 1.12 0.789 0.552-1.026 Acceptable 2nd/202 MAPEP Uranium-MAPEP 2 06/15/22 RdV46 veg Bq/smpl 234/233 0.0763 0.071 0.050-0.092 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Uranium-238 0.0746 0.074 0.052-0.096 Acceptable 2nd/202 MAPEP MAPEP 2 06/15/22 RdV46 veg Bq/smpl Zinc-65 1.53 1.47 1.03-1.91 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 GrF47 Filter e Gross Alpha 0.378 0.90 0.27-1.53 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 GrF47 Filter e Gross Beta 1.25 1.31 0.66-1.97 Acceptable MAPEP MAPEP 4th/2022 12/15/22 GrW47 Water Bq/L Gross Alpha 0.978 0.871 0.261-1.481 Acceptable MAPEP MAPEP 4th/2022 12/15/22 GrW47 Water Bq/L Gross Beta 4.57 5.20 2.60-7.80 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Americium-241 96.8 99.2 69.4-129.0 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Cesium-134 564 627 439-815 Acceptable MAPEP False Pos MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Cesium-137 0.284 Test Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Cobalt-57 856 786 550-1022 Acceptable MAPEP False Pos MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Cobalt-60 0.429 Test Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Iron-55 628 740 518-962 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Manganese-54 888 841 589-1093 Acceptable MAPEP False Pos MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Nickel-63 20.0 Test Acceptable MAPEP Sens.
MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Plutonium-238 0.285 0.56 Evaluation Acceptable MAPEP Plutonium-MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg 239/240 110 113 79-147 Acceptable MAPEP Sens.
MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Plutonium-241 22.7 26.8 Evaluation Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Potassium-40 561 537 376-698 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Strontium-90 842 852 596-1108 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Thorium-228 55 49 34-64 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Thorium-230 49.6 43 30-56 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Thorium-232 51 47 33-61 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Technetium-99 979 1000 700-1300 Acceptable MAPEP Not MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg U-234/233 88.9 50.8 35.6-66.0 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Uranium-238 196 157 110-204 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaS47 Soil Bq/Kg Zinc-65 1240 1140 798-1482 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Americium-241 0.414 0.327 0.229-0.425 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Cesium-134 15.9 17.1 12.0-22.2 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Cesium-137 17.80 16.8 11.8-21.8 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Cobalt-57 30.4 30.0 21.0-39.0 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Cobalt-60 17.8 17.0 11.9-22.1 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Hydrogen-3 350 395 277-514 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Iron-55 22.9 27.8 19.5-36.1 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 21
MAPEP False Pos MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Manganese-54 -0.0317 Test Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Nickel-63 35.7 32.9 23.0-42.8 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Plutonium-238 0.881 0.985 0.690-1.281 Acceptable MAPEP Plutonium-MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L 239/240 0.943 1.070 0.749-1.391 Acceptable MAPEP False Pos MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Potassium-40 -0.850 Test Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Radium-226 0.471 0.511 0.358-0.664 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Strontium-90 7.49 7.73 5.41-10.05 Acceptable MAPEP False Pos MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Technetium-99 -0.206 Test Acceptable MAPEP Uranium-MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L 234/233 1.3100 1.3400 0.96-1.78 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Uranium-238 0.851 0.84 0.59-1.09 Acceptable MAPEP MAPEP 4th/2022 12/15/22 MaW47 Water Bq/L Zinc-65 12.6 11.3 7.9-14.7 Acceptable MAPEP ug/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Uranium-235 0.0803 0.0743 0550-0.0966 Acceptable MAPEP ug/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Uranium-238 11.6 10.4 7.3-13.5 Acceptable MAPEP ug/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Uranium-Total 11.680 10.5 7.4-13.7 Acceptable MAPEP Bq/sampl 0.0629-MAPEP 4th/2022 12/15/22 RdF47 Filter e Americium-241 0.0953 0.0899 0.1169 Acceptable MAPEP Bq/sampl False Pos MAPEP 4th/2022 12/15/22 RdF47 Filter e Cesium-134 0.0435 Test Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Cesium-137 1.66 1.530 1.07-1.99 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Cobalt-57 3.32 3.32 2.32-4.32 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Cobalt-60 2.00 1.99 1.39-2.59 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Manganese-54 1.97 1.88 1.32-2.44 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Plutonium-238 0.1110 0.1160 0.081-0.151 Acceptable MAPEP Bq/sampl Plutonium- 0.0655-MAPEP 4th/2022 12/15/22 RdF47 Filter e 239/240 0.0854 0.0936 0.1217 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Strontium-90 1.580 1.620 1.13-2.11 Acceptable MAPEP Bq/sampl Uranium-MAPEP 4th/2022 12/15/22 RdF47 Filter e 234/233 0.132 0.125 0.088-0.163 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Uranium-238 0.14 0.130 0.091-0.169 Acceptable MAPEP Bq/sampl MAPEP 4th/2022 12/15/22 RdF47 Filter e Zinc-65 1.77 1.58 1.11-2.05 Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Americium-241 0.1890 0.1890 0.132-0.246 Acceptable MAPEP Vegetatio Bq/sampl False Pos MAPEP 4th/2022 12/15/22 RdV47 n e Cesium-134 -0.002 Test Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Cesium-137 1.18 1.083 0.758-1.408 Acceptable MAPEP Vegetatio Bq/sampl False Pos MAPEP 4th/2022 12/15/22 RdV47 n e Cobalt-57 0.0163 Test Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Cobalt-60 4.84 4.62 3.23-6.01 Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Manganese-54 2.42 2.43 1.70-3.16 Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Plutonium-238 0.1490 0.156 0.109-0.203 Acceptable MAPEP Vegetatio Bq/sampl Plutonium-MAPEP 4th/2022 12/15/22 RdV47 n e 239/240 0.14900 1.162 0.113-0.211 Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Strontium-90 1.78 1.60 1.12-208 Acceptable MAPEP Vegetatio Bq/sampl Uranium-MAPEP 4th/2022 12/15/22 RdV47 n e 234/233 0.1330 0.1260 0.088-0.164 Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Uranium-238 0.135 0.130 0.091-0.169 Acceptable MAPEP Vegetatio Bq/sampl MAPEP 4th/2022 12/15/22 RdV47 n e Zinc-65 8.21 7.49 5.24-9.74 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 22
TABLE 2 2022 ECKERT & ZIEGLER ANALYTICS PERFORMANCE EVALUATION RESULTS Report Closing /
PT Quarter / Received Sample Sample Reported Assigned Acceptance Performance Provider Year Date Number Media Units Analyte Value Value Limits Evaluation EZA 1st/2022 05/20/22 E13655 Cartridge pCi Iodine-131 8.98E+01 8.72E+01 1.03 Acceptable EZA 1st/2022 05/20/22 E13656 Milk pCi/L Strontium-89 9.30E+01 9.68E+01 0.96 Acceptable EZA 1st/2022 05/20/22 E13656 Milk pCi/L Strontium-90 8.41E+00 1.26E+01 0.67 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cerium-141 8.31E+01 6.46E+01 1.29 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cobalt-58 1.66E+02 1.64E+02 1.04 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cobalt-60 2.96E+02 3.02E+02 0.98 Acceptable Chromium-EZA 1st/2022 05/20/22 E13657 Milk pCi/L 51 3.92E+02 3.39E+02 1.16 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cesium-134 1.68E+02 1.82E+02 0.92 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Cesium-137 2.41E+02 2.23E+02 1.08 Acceptable Manganese-EZA 1st/2022 05/20/22 E13657 Milk pCi/L 54 1.76E+02 1.64E+02 1.07 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Iron-59 1.91E+02 1.85E+02 1.03 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Iodine-131 1.19E+02 9.67E+01 1.23 Acceptable EZA 1st/2022 05/20/22 E13657 Milk pCi/L Zinc-65 2.62E+02 2.46E+02 1.06 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Cerium-141 7.12E+01 7.61E+01 0.94 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Cobalt-58 2.05E+02 1.93E+02 1.06 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Cobalt-60 3.79E+02 3.55E+02 1.07 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Cesium-134 2.00E+02 2.14E+02 0.93 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Cesium-137 2.65E+02 2.63E+02 1.01 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Iodine-131 9.35E+01 8.76E+01 1.07 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Iron-59 2.39E+02 2.18E+02 1.10 Acceptable Manganese-EZA 1st/2022 05/20/22 E13658 Water pCi/L 54 2.07E+02 1.93E+02 1.07 Acceptable EZA 1st/2022 05/20/22 E13658 Water pCi/L Zinc-65 3.25E+02 2.90E+02 1.12 Acceptable EZA 2nd/2022 06/16/22 E13659 Cartridge pCi Iodine-131 8.77E+01 8.53E+01 103 Acceptable EZA 2nd/2022 06/16/22 E13660 Milk pCi/L Strontium-89 6.76E+01 8.72E+01 0.78 Acceptable EZA 2nd/2022 06/16/22 E13660 Milk pCi/L Strontium-90 1.07E+01 1.45E+01 0.74 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Cerium-141 1.68E+02 1.71E+02 0.98 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Cobalt-58 1.51E+02 1.59E+02 0.95 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Cobalt-60 3.04E+02 2.99E+02 1.02 Acceptable Chromium-EZA 2nd/2022 06/16/22 E13661 Milk pCi/L 51 4.53E+02 4.25E+02 1.07 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Cesium-134 1.92E+02 2.12E+02 0.91 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Cesium-137 2.51E+02 2.52E+02 1.00 Acceptable Manganese-EZA 2nd/2022 06/16/22 E13661 Milk pCi/L 54 2.95E+02 2.83E+02 1.02 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Iron-59 2.29E+02 1.94E+02 1.18 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Iodine-131 8.45E+01 9.05E+01 0.93 Acceptable EZA 2nd/2022 06/16/22 E13661 Milk pCi/L Zinc-65 3.90E+02 3.66E+02 1.07 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Cerium-141 1.54E+02 1.39E+02 1.11 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Cobalt-58 1.38E+02 1.28E+02 1.07 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Cobalt-60 2.58E+02 2.42E+02 1.07 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Cesium-134 1.68E+02 1.72E+02 0.98 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Cesium-137 2.12E+02 2.04E+02 1.04 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Iodine-131 8.47E+01 9.12E+01 0.93 Acceptable EZA 2nd/2022 06/16/22 E13662 Water pCi/L Iron-59 1.71E+02 1.57E+02 1.09 Acceptable Manganese-EZA 2nd/2022 06/16/22 E13662 Water pCi/L 54 2.57E+02 2.29E+02 1.12 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 23
EZA 2nd/2022 06/16/22 E13662 Water pCi/L Zinc-65 3.09E+02 2.96E+02 1.04 Acceptable EZA 2nd/2022 08/24/22 E13659 Cartridge pCi Iodine-131 8.77E+01 8.53E+01 1.03 Acceptable EZA 2nd/2022 08/24/22 E13660 Milk pCi/L Strontium-89 6.76E+01 8.72E+01 0.78 Acceptable EZA 2nd/2022 08/24/22 E13660 Milk pCi/L Strontium-90 1.07E+01 1.45E+01 0.74 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Cerium-141 1.68E+02 1.71E+02 0.98 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Cobalt-58 1.51E+02 1.59E+02 0.95 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Cobalt-60 3.04E+02 2.99E+02 1.02 Acceptable Chromium-EZA 2nd/2022 08/24/22 E13361 Milk pCi/L 51 4.53E+02 4.25E+02 1.07 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Cesium-134 1.92E+02 2.12E+02 0.91 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Cesium-137 2.51E+02 2.52E+02 1.00 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Iron-59 2.29E+02 1.94E+02 1.18 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Iodine-131 8.45E+01 9.05E+01 0.93 Acceptable Manganese-EZA 2nd/2022 08/24/22 E13361 Milk pCi/L 54 2.95E+02 2.83E+02 1.04 Acceptable EZA 2nd/2022 08/24/22 E13361 Milk pCi/L Zinc-65 3.90E+02 3.66E+02 1.07 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Cerium-141 1.54E+02 1.39E+02 1.11 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Cobalt-58 1.38E+02 1.28E+02 1.07 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Cobalt-60 2.58E+02 2.42E+02 1.07 Acceptable Chromium-EZA 2nd/2022 08/24/22 E13662 Water pCi/L 51 3.66E+02 3.44E+02 1.06 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Cesium-134 1.68E+02 1.72E+02 0.98 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Cesium-137 2.12E+02 2.04E+02 1.04 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Iron-59 1.71E+02 1.57E+02 1.09 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Iodine-131 8.47E+01 9.12E+01 0.93 Acceptable Manganese-EZA 2nd/2022 08/24/22 E13662 Water pCi/L 54 2.57E+02 2.29E+02 1.12 Acceptable EZA 2nd/2022 08/24/22 E13662 Water pCi/L Zinc-65 3.09E+02 2.96E+02 1.04 Acceptable EZA 3rd/2022 11/22/22 E13663 Cartridge pCi Iodine-131 7.97E+01 8.35E+01 0.95 Acceptable EZA 3rd/2022 11/22/22 E13664 Milk pCi/L Strontium-89 9.54E+01 8.91E+01 1.07 Acceptable EZA 3rd/2022 11/22/22 E13664 Milk pCi/L Strontium-90 8.87E+00 1.36E+01 0.65 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cerium-141 1.52E+02 1.61E+02 0.94 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cobalt-58 1.87E+02 1.89E+02 0.99 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cobalt-60 2.65E+02 2.60E+02 1.02 Acceptable Chromium-EZA 3rd/2022 11/22/22 E13665 Milk pCi/L 51 4.63E+02 4.56E+02 1.02 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cesium-134 2.31E+02 2.52E+02 0.92 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Cesium-137 2.24E+02 2.22E+02 1.01 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Iron-59 1.91E+02 1.73E+02 1.10 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Iodine-131 9.28E+01 9.42E+01 0.99 Acceptable Manganese-EZA 3rd/2022 11/22/22 E13665 Milk pCi/L 54 2.97E+02 2.82E+02 1.05 Acceptable EZA 3rd/2022 11/22/22 E13665 Milk pCi/L Zinc-65 3.98E+02 3.73E+02 1.07 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cerium-141 1.29E+02 1.26E+02 1.02 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cobalt-58 1.49E+02 1.48E+02 1.01 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cobalt-60 2.17E+02 2.04E+02 1.07 Acceptable Chromium-EZA 3rd/2022 11/22/22 E13666 Water pCi/L 51 3.84E+02 3.57E+02 1.07 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cesium-134 1.84E+02 1.98E+02 0.93 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Cesium-137 1.79E+02 1.74E+02 1.03 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Iron-59 1.57E+02 1.36E+02 1.16 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Iodine-131 8.96E+01 8.80E+01 1.02 Acceptable Manganese-EZA 3rd/2022 11/22/22 E13666 Water pCi/L 54 2.30E+02 2.21E+02 1.04 Acceptable EZA 3rd/2022 11/22/22 E13666 Water pCi/L Zinc-65 3.42E+05 2.93E+02 1.17 Acceptable EZA 4th/2022 2/15/23 E13667 Cartridge pCi Iodine-131 8.96E+01 9.18E+01 0.98 Acceptable EZA 4th/2022 2/15/23 E13668 Milk pCi/L Strontium-89 9.93E+01 9.04E+01 1.10 Acceptable EZA 4th/2022 2/15/23 E13668 Milk pCi/L Strontium-90 1.28E+01 1.50E+01 0.86 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 24
EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cerium-141 2.32E+02 2.25E+02 1.03 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cobalt-58 2.35E+02 2.30E+02 1.02 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cobalt-60 2.85E+02 2.90E+02 0.98 Acceptable Chromium-EZA 4th/2022 2/15/23 E13669 Milk pCi/L 51 4.62E+02 4.64E+02 0.99 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cesium-134 1.76E+02 1.91E+02 0.92 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Cesium-137 2.16E+02 2.19E+02 0.99 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Iron-59 2.31E+02 1.98E+02 1.17 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Iodine-131 1.02E+02 9.51E+01 1.07 Acceptable Manganese-EZA 4th/2022 2/15/23 E13669 Milk pCi/L 54 2.64E+02 2.52E+02 1.05 Acceptable EZA 4th/2022 2/15/23 E13669 Milk pCi/L Zinc-65 3.50E+02 3.05E+02 1.15 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Cerium-141 2.33E+02 2.24E+02 1.04 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Cobalt-58 2.54E+02 2.29E+02 1.07 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Cobalt-60 2.97E+02 2.89E+02 1.03 Acceptable Chromium-EZA 4th/2022 2/15/23 E13670 Water pCi/L 51 5.24E+02 4.62E+02 1.13 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Cesium-134 1.71E+02 1.91E+02 0.90 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Cesium-137 2.17E+02 2.18E+02 1.00 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Iron-59 2.32E+02 1.97E+02 1.18 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Iodine-131 9.96E+01 9.63E+01 1.03 Acceptable Manganese-EZA 4th/2022 2/15/23 E13670 Water pCi/L 54 2.72E+02 2.51E+02 1.08 Acceptable EZA 4th/2022 2/15/23 E13670 Water pCi/L Zinc-65 3.36E+02 3.04E+02 1.11 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 25
TABLE 3 2022 DEPARTMENT OF ENERGY MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP) RESULTS Report Closing /
PT Quarter / Received Sample Reported Assigned Acceptance Performance Provider Year Date Sample Number Media Units Analyte Value Value Limits Evaluation MAPEP 2nd/2022 06/15/22 MAPEP-22-GrF46 Filter Bq/smpl Gross Alpha 0.864 1.77 0.53-3.01 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-GrF46 Filter Bq/smpl Gross Beta 0.639 0.649 0.325-0.974 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-GrW46 Water Bq/L Gross Alpha 0.782 0.87 0.26-1.48 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-GrW46 Water Bq/L Gross Beta 2.40 2.50 1.25-3.75 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Americium-241 56.2 72 50.4-93.6 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Cesium-134 741 890 623-1157 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Cesium-137 369 365 256-475 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Cobalt-57 1450 1400 980-1820 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Cobalt-60 411 443 310-576 Acceptable Not MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Iron-55 725 1100 770-1430 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Manganese-54 1140 1140 798-1482 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg 766 780 546-1014 482-896 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Plutonium-238 54.2 56 39.2-72.8 Acceptable Plutonium-MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg 239/240 41.1 41 28.7-53.3 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Potassium-40 598 596 417-775 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Strontium-90 560 677 474-880 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Technetium-99 506 778 545-1011 Not Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Thorium 228 45.8 43 30-56 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Thorium 230 49 38 27-49 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Thorium 232 39.5 42 29-55 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg U-234/233 46 44 30.8-57.2 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Uranium-238 126 123 86-160 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaS46 Soil Bq/Kg Zinc-65 -0.659 False pos. test Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Americium-241 0.271 0.335 0.249-0.462 Acceptable False pos.
MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Cesium-134 -0.0355 test Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Cesium-137 7.9 7.64 5.35-9.93 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Cobalt-57 37 36 25.2-46.8 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Cobalt-60 9.64 9.3 6.5-12.1 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Hydrogen-3 303 300 210-390 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Iron-55 27.1 26.9 18.8-35.0 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Manganese-54 19.8 18.9 13.2-24.6 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Nickel-63 31.7 34 23.8-44.2 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Plutonium-238 0.992 1.07 0.75-1.39 Acceptable Plutonium-MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L 239/240 1.07 1.19 0.83-1.55 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Potassium-40 -875 False pos. test Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Radium-226 0.871 0.8 0.6-1.0 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Strontium-90 14.9 12.9 5.5-10.3 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Technetium-99 7.89 7.9 5.5-10.3 Acceptable Uranium-MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L 234/233 1.52 1.5 1.1-2.0 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Uranium-238 1.55 1.54 1.08-2.00 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-MaW46 Water Bq/L Zinc-65 29.3 26.2 18.3-34.1 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter ug/smpl Uranium-235 0.0407 0.041 0.029-0.053 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter ug/smpl Uranium-238 5.8 5.35 3.75-6.96 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 26
MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter ug/smpl Uranium-Total 5.84 5.4 3.8-7.0 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Americium-241 0.0392 0.0439 0.307-0.0571 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Cesium-134 0.936 0.93 0.65-1.21 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Cesium-137 0.759 0.726 0.0508-0.944 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Cobalt-57 0 False pos. test Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Cobalt-60 0.831 0.72 0.50-0.84 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Manganese-54 0.00527 False pos. test Acceptable 0.0155-MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Plutonium-238 0.0212 0.0221 0.0287 Acceptable Plutonium- 0.0099-MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl 239/240 0.0142 0.0141 0.0183 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Strontium-90 0.5 0.54 0.38-0.70 Acceptable Uranium-MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl 234/233 0.063 0.06 0.045-0.083 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Uranium-238 0.0685 0.067 0.047-0.087 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdF46 Filter Bq/smpl Zinc-65 0.0755 False pos. test Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Americium-241 0.0892 0.101 0.071-0.131 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Cesium-134 7.04 7.61 5.33-9.89 Not Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Cesium-137 1.57 1.52 1.06-1.98 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Cobalt-57 5.06 5.09 3.56-6.62 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Cobalt-60 -0.077 2.09-3.89 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Manganese-54 2.7 2.59 1.81-3.37 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Plutonium-238 0.267 0.27 0.019-0.035 Acceptable Plutonium- 0.0416-MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl 239/240 0.625 0.0594 0.0772 Acceptable Not MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Strontium-90 1.12 0.789 0.552-1.026 Acceptable Uranium-MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl 234/233 0.0763 0.071 0.050-0.092 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Uranium-238 0.0746 0.074 0.052-0.096 Acceptable MAPEP 2nd/2022 06/15/22 MAPEP-22-RdV46 veg Bq/smpl Zinc-65 1.53 1.47 1.03-1.91 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-GrF47 Filter Bq/sample Gross Alpha 0.378 0.90 0.27-1.53 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-GrF47 Filter Bq/sample Gross Beta 1.25 1.31 0.66-1.97 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-GrW47 Water Bq/L Gross Alpha 0.978 0.871 0.261-1.481 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-GrW47 Water Bq/L Gross Beta 4.57 5.20 2.60-7.80 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Americium-241 96.8 99.2 69.4-129.0 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Cesium-134 564 627 439-815 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Cesium-137 0.284 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Cobalt-57 856 786 550-1022 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Cobalt-60 0.429 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Iron-55 628 740 518-962 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Manganese-54 888 841 589-1093 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Nickel-63 20.0 Test Acceptable Sens.
MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Plutonium-238 0.285 0.56 Evaluation Acceptable Plutonium-MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg 239/240 110 113 79-147 Acceptable Sens.
MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Plutonium-241 22.7 26.8 Evaluation Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Potassium-40 561 537 376-698 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Strontium-90 842 852 596-1108 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Thorium-228 55 49 34-64 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Thorium-230 49.6 43 30-56 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Thorium-232 51 47 33-61 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Technetium-99 979 1000 700-1300 Acceptable Not MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg U-234/233 88.9 50.8 35.6-66.0 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Uranium-238 196 157 110-204 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaS47 Soil Bq/Kg Zinc-65 1240 1140 798-1482 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 27
MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Americium-241 0.414 0.327 0.229-0.425 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Cesium-134 15.9 17.1 12.0-22.2 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Cesium-137 17.80 16.8 11.8-21.8 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Cobalt-57 30.4 30.0 21.0-39.0 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Cobalt-60 17.8 17.0 11.9-22.1 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Hydrogen-3 350 395 277-514 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Iron-55 22.9 27.8 19.5-36.1 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Manganese-54 -0.0317 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Nickel-63 35.7 32.9 23.0-42.8 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Plutonium-238 0.881 0.985 0.690-1.281 Acceptable Plutonium-MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L 239/240 0.943 1.070 0.749-1.391 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Potassium-40 -0.850 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Radium-226 0.471 0.511 0.358-0.664 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Strontium-90 7.49 7.73 5.41-10.05 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Technetium-99 -0.206 Test Acceptable Uranium-MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L 234/233 1.3100 1.3400 0.96-1.78 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Uranium-238 0.851 0.84 0.59-1.09 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-MaW47 Water Bq/L Zinc-65 12.6 11.3 7.9-14.7 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter ug/sample Uranium-235 0.0803 0.0743 0550-0.0966 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter ug/sample Uranium-238 11.6 10.4 7.3-13.5 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter ug/sample Uranium-Total 11.680 10.5 7.4-13.7 Acceptable 0.0629-MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Americium-241 0.0953 0.0899 0.1169 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Cesium-134 0.0435 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Cesium-137 1.66 1.530 1.07-1.99 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Cobalt-57 3.32 3.32 2.32-4.32 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Cobalt-60 2.00 1.99 1.39-2.59 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Manganese-54 1.97 1.88 1.32-2.44 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Plutonium-238 0.1110 0.1160 0.081-0.151 Acceptable Plutonium- 0.0655-MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample 239/240 0.0854 0.0936 0.1217 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Strontium-90 1.580 1.620 1.13-2.11 Acceptable Uranium-MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample 234/233 0.132 0.125 0.088-0.163 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Uranium-238 0.14 0.130 0.091-0.169 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdF47 Filter Bq/sample Zinc-65 1.77 1.58 1.11-2.05 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Americium-241 0.1890 0.1890 0.132-0.246 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Cesium-134 -0.002 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Cesium-137 1.18 1.083 0.758-1.408 Acceptable False Pos MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Cobalt-57 0.0163 Test Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Cobalt-60 4.84 4.62 3.23-6.01 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Manganese-54 2.42 2.43 1.70-3.16 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Plutonium-238 0.1490 0.156 0.109-0.203 Acceptable Plutonium-MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample 239/240 0.14900 1.162 0.113-0.211 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Strontium-90 1.78 1.60 1.12-208 Acceptable Uranium-MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample 234/233 0.1330 0.1260 0.088-0.164 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Uranium-238 0.135 0.130 0.091-0.169 Acceptable MAPEP 4th/2022 12/15/22 MAPEP-22-RdV47 Vegetation Bq/sample Zinc-65 8.21 7.49 5.24-9.74 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 28
TABLE 4 2022 ERA PROGRAM PERFORMANCE EVALUATION RESULTS Report Closing /
PT Quarter / Received Sample Sample Reported Assigned Acceptance Performance Provider Year Date Number Media Units Analyte Value Value Limits Evaluation ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Barium-133 65.2 63 52.4 - 69.4 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Cesium-134 81.9 84.9 69.6 - 93.4 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Cesium-137 29.5 29.3 25.2 - 35.3 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Cobalt-60 112 102 91.8 - 114 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Zinc-65 345 312 281 - 364 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Gross Alpha 32.1 32.5 16.6 - 42.1 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Gross Alpha 32.2 32.5 16.6 - 42.1 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Gross Beta 63.8 68.3 47.4 - 75.1 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Radium-226 12.6 9.53 7.14 - 11.1 Not Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Radium-228 11.5 8.71 5.59 - 11.0 Not Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Uranium (Nat) 66.3 69 56.4 - 75.9 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water µg/L Uranium (mass) 109.74 101 82.5 - 111 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water µg/L Uranium (mass) 109.74 101 82.5 - 111 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water µg/L Uranium (mass) 109.74 101 82.5 - 111 Acceptable 19500 -
ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Tritium 21500 22200 24400 Acceptable 19500 -
ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Tritium 21200 22200 24400 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Strontium-89 72.8 65 52.7 - 73.0 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Strontium-89 77.7 65 52.7 - 73.0 Not Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Strontium-90 43.7 40.8 30.0 - 46.9 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Strontium-90 42.6 40.8 30.0 - 46.9 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Iodine-131 18.8 21.1 17.5 - 25.3 Acceptable ERA 1st/2022 2/28/2022 RAD-128 Water pCi/L Iodine-131 23.7 21.1 17.5 - 25.3 Acceptable ERA 2nd/2022 5/23/2022 RAD 129 Water pCi/L Radium-226 8.15 9.46 7.09 - 11.1 Acceptable ERA 2nd/2022 5/23/2022 RAD 129 Water pCi/L Radium-228 3.06 3.18 1.71 - 4.63 Acceptable ERA 2nd/2022 5/23/2022 RAD 129 Water pCi/L Strontium-89 67.6 67.9 55.3 - 76.1 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Barium-133 40.1 38.2 30.9 - 42.8 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Cesium-134 84.7 88.6 72.7 - 97.5 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Cesium-137 177 170 153 - 189 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Cesium-137 177 170 153 - 189 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Cobalt-60 79 72.4 65.2 - 82.1 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Zinc-65 363 326 293 - 380 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Gross Alpha 54.3 60.2 31.5 - 74.8 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Gross Alpha 58.8 60.2 31.5 - 74.8 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Gross Alpha 58.8 60.2 31.5 - 74.8 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Gross Beta 22.5 17.7 10.1 - 25.9 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Gross Beta 22.5 17.7 10.1 - 25.9 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Radium-226 12.1 13.1 9.77 - 15.1 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Radium-228 8.05 8.4 5.38 - 10.6 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Radium-228 7.91 8.4 5.38 - 10.6 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Uranium (Nat) 53.6 54 44.0 - 59.5 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water µg/L Uranium (mass) 74.525 78.8 64.2 - 86.8 Acceptable 19400 -
ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Tritium 20200 22100 24300 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Strontium-89 48.4 49.6 39.0 - 57.0 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Strontium-89 47.4 49.6 39.0 - 57.0 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Strontium-90 12.8 11.2 7.62 - 13.8 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Strontium-90 11.9 11.2 7.62 - 13.8 Acceptable ERA 3rd/2022 08/29/22 RAD-130 Water pCi/L Iodine-131 28.9 27.7 23.0 - 32.5 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 29
TABLE 5 2022 ERA PROGRAM (MRAD) PERFORMANCE EVALUATION RESULTS Report Closing /
PT Quarter / Received Sample Sample Reported Assigned Acceptance Performance Provider Year Date Number Media Units Analyte Value Value Limits Evaluation MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Actinium-228 1710 1670 1100 - 2100 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Bismuth-212 2130 1840 527 - 2740 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Bismuth-214 888 790 379 - 1180 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Cesium-134 6470 6620 4530 - 7910 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Cesium-134 6470 6620 4530 - 7910 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Cesium-137 7680 6760 5110 - 8550 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Cobalt-60 3110 2820 2220 - 3480 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Lead-212 1880 1630 1140 - 2060 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Lead-214 1090 838 352 - 1320 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Manganese-54 <24.3 <555 <555 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Plutonium-238 260 289 144 - 439 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Plutonium-239 1290 1180 643 - 1700 Acceptable MRAD- 26100 -
ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Potassium-40 40500 37900 45300 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Strontium-90 7090 6720 2090 - 10500 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Thorium-234 4900 3390 1280 - 5810 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-234 3830 3410 1600 - 4470 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-234 4120 3410 1600 - 4470 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-234 3830 3410 1600 - 4470 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-238 4080 3390 1860 - 4550 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-238 4060 3390 1860 - 4550 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-Total 8170 6960 3860 - 9000 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-Total 8366 6960 3860 - 9000 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Uranium-Total 8170 6960 3860 - 9000 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil µg/kg Uranium (mass) 12300 10100 4560 - 13600 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Zinc-65 6450 5070 4050 - 6920 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Americium-241 1670 1850 1140 - 2610 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Soil pCi/kg Cesium-134 1900 2450 1630 - 3260 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Cesium-137 1330 1460 1120 - 1970 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Cesium-137 1330 1460 1120 - 1970 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Cobalt-60 822 902 708 - 1180 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Curium-244 1270 1530 863 - 1900 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Manganese-54 <25.2 <207 <207 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Plutonium-238 3470 3640 2520 - 4690 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Plutonium-239 3400 3540 2450 - 4480 Acceptable MRAD- 25000 -
ERA 2nd/2022 5/27/2022 36 veg pCi/kg Potassium-40 32400 33300 42200 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 30
MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Strontium-90 5170 4340 2450 - 5660 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Uranium-234 3750 3980 2800 - 5080 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Uranium-238 3850 3940 2780 - 4930 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Uranium-Total 7800 8110 5180 - 10900 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg µg/kg Uranium (mass) 11500 11800 9060 - 14600 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 veg pCi/kg Zinc-65 564 545 407 - 808 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Americium-241 22.6 21 15.0 - 28.0 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Cesium-134 497 549 356 - 673 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Cesium-137 1320 1320 1080 - 1730 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Cobalt-60 905 885 752 - 1120 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Iron-55 110 127 46.4 - 203 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Manganese-54 <4.39 <35.0 <35.0 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Plutonium-238 27.1 29.6 22.3 - 36.4 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Plutonium-239 44.5 49.7 37.2 - 60.0 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Strontium-90 38 31.1 19.7 - 42.3 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Uranium-234 59.1 67.3 49.9 - 78.9 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Uranium-234 62.3 67.3 49.9 - 78.9 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Uranium-238 61.5 66.7 50.4 - 79.6 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Uranium-238 63.6 66.7 50.4 - 79.6 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Uranium-Total 124 137 100 - 162 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Uranium-Total 128.9 137 100 - 162 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter µg/Filter Uranium (mass) 184 200 160 - 234 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter µg/Filter Uranium (mass) 190 200 160 - 234 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Zinc-65 730 671 550 - 1030 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Zinc-65 730 671 550 - 1030 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Gross Alpha 98.4 94.2 49.2 - 155 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Filter pCi/Filter Gross Beta 71.5 66.8 40.5 - 101 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Americium-241 65 74.6 51.2 - 95.4 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cesium-134 1620 1720 1300 - 1890 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cesium-134 1620 1720 1300 - 1890 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cesium-134 1620 1720 1300 - 1890 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cesium-137 1130 1120 959 - 1270 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cesium-137 1130 1120 959 - 1270 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cesium-137 1130 1120 959 - 1270 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Cobalt-60 2880 2710 2340 - 3110 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Iron-55 1270 1140 670 - 1660 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Manganese-54 <8.37 <71.0 <71.0 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Plutonium-238 116 147 88.4 - 190 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Plutonium-239 56 71.9 44.5 - 88.6 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Strontium-90 639 628 452 - 776 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Uranium-234 41.2 44.1 33.6 - 50.4 Acceptable ERA 2nd/2022 5/27/2022 MRAD- Water pCi/L Uranium-234 44 44.1 33.6 - 50.4 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 31
36 MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Uranium-238 44.7 43.7 33.9 - 51.4 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Uranium-238 43.5 43.7 33.9 - 51.4 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Uranium-Total 88.9 89.8 70.0 - 102 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Uranium-Total 89.5 89.8 70.0 - 102 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water µg/L Uranium (mass) 134 131 106 - 149 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water µg/L Uranium (mass) 130 131 106 - 149 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Zinc-65 1320 1220 1090 - 1540 Acceptable MRAD-ERA 2nd/2022 5/27/2022 36 Water pCi/L Gross Alpha 74.5 79.4 29.0 - 109 Acceptable MRAD- 21300 -
ERA 2nd/2022 5/27/2022 36 Water pCi/L Tritium 28000 28200 34300 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Actinium-228 1550 1670 1100 - 2100 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Americium-241 187 147 79.4 - 208 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Bismuth-212 1460 1670 478 - 2490 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Bismuth-214 592 790 379 - 1180 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Bismuth-214 592 790 379 - 1180 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Cesium-134 8710 9600 6560 - 11500 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Cesium-137 8080 7890 5970 - 9980 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Cobalt-60 1490 1500 1180 - 1850 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Lead-212 1820 1630 1140 - 2060 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Lead-214 735 838 352 - 1320 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Manganese-54 <32.1 <555 <555 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Plutonium-238 1100 1100 549 - 1670 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Plutonium-239 948 967 527 - 1390 Acceptable MRAD- 29700 -
ERA 4th/2022 11/21/22 37 Soil pCi/kg Potassium-40 41300 43100 51500 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Strontium-90 5310 6270 1950 - 9770 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Thorium-234 3920 3320 1250 - 5690 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Uranium-234 3410 3350 1570 - 4390 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Uranium-234 3640 3350 1570 - 4390 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Uranium-238 3880 3320 1820 - 4460 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Uranium-Total 7520 6830 3790 - 8830 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil µg/kg Uranium (mass) 11600 9960 4490 - 13400 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Soil pCi/kg Zinc-65 4300 3990 3190 - 5440 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Americium-241 3650 3560 2200 - 5030 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Cesium-134 1820 1860 1230 - 2480 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Cesium-137 2560 2300 1770 - 3100 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Cobalt-60 528 496 389 - 648 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Curium-244 957 1100 620 - 1370 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Manganese-54 <27.4 <207 <207 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Plutonium-238 1320 1300 900 - 1680 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Plutonium-239 1190 1170 809 - 1480 Acceptable MRAD- Not ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Strontium-90 4560 2960 1670 - 3860 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Uranium-234 1090 1090 766 - 1390 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 32
MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Uranium-238 1100 1080 763 - 1350 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Uranium-Total 2230 2220 1420 - 2990 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation µg/kg Uranium (mass) 3300 3240 2490 - 4010 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Vegetation pCi/kg Zinc-65 665 512 382 - 759 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Americium-241 41.2 38.8 27.7 - 51.7 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Cesium-134 286 325 211 - 399 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Cesium-137 739 795 653 - 1040 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Cobalt-60 203 191 162 - 243 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Iron-55 107 122 44.5 - 195 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Manganese-54 <2.38 <35.0 <35.0 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Plutonium-238 29.9 29.9 22.6 - 36.7 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Plutonium-239 12.1 13 9.73 - 15.7 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Strontium-90 130 133 84.1 - 181 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Uranium-234 68.1 71.5 53.0 - 83.8 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Uranium-234 69.9 71.5 53.0 - 83.8 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Uranium-238 70.1 70.9 53.5 - 84.6 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Uranium-238 72.3 70.9 53.5 - 84.6 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Uranium-Total 141 146 107 - 173 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Uranium-Total 142.2 146 107 - 173 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter µg/Filter Uranium (mass) 210 212 170 - 248 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter µg/Filter Uranium (mass) 216 212 170 - 248 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Zinc-65 133 120 98.4 - 183 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Gross Alpha 57.8 55.5 29.0 - 91.4 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Filter pCi/Filter Gross Beta 68.2 64.8 39.3 - 97.9 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Americium-241 100 96.2 66.0 - 123 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Cesium-134 452 483 365 - 531 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Cesium-137 1220 1250 1070 - 1420 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Cobalt-60 1500 1420 1220 - 1630 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Iron-55 867 926 544 - 1350 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Manganese-54 <5.46 <71.0 <71.0 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Plutonium-238 44.5 52.6 31.6 - 68.2 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Plutonium-239 94.4 117 72.5 - 144 Acceptable MRAD- Not ERA 4th/2022 11/21/22 37 Water pCi/L Strontium-90 283 224 161 - 277 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Uranium-234 140 153 116 - 175 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Uranium-234 145 153 116 - 175 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Uranium-238 147 152 118 - 179 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Uranium-238 156 152 118 - 179 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Uranium-Total 296 312 243 - 356 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Uranium-Total 301 312 243 - 356 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water µg/L Uranium (mass) 442 455 369 - 516 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water µg/L Uranium (mass) 468 455 369 - 516 Acceptable ERA 4th/2022 11/21/22 MRAD- Water pCi/L Zinc-65 145 122 109 - 154 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 33
37 MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Gross Alpha 46.6 42.7 15.6 - 58.9 Acceptable MRAD-ERA 4th/2022 11/21/22 37 Water pCi/L Gross Beta 93.6 111 55.5 - 153 Acceptable MRAD- 14200 -
ERA 4th/2022 11/21/22 37 Water pCi/L Tritium 16900 18800 22900 Acceptable GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 34
FIGURE 1 COBALT-60 PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Cobalt-60 Performance Evaluation Results and % Bias 100.0 75.0 50.0
_____.__ Co-60 25.0 Upper Contol
% Bias 0.0 Limit Lower
-25.0 Control Limit
-50.0
-75.0
-100.0 January 2022- December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 35
FIGURE 2 CESIUM-137 PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Cesium-137 Performance Evaluation Results and % Bias 100.0 75.0 50.0
____.__ Series1 25.0
% Bias 0.0 Series2
-25.0 Series3
-50.0
-75.0
-100.0 January 2022- December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 36
FIGURE 3 TRITIUM PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Tritium Performance Evaluation Results and % Bias 100.0 75.0 50.0 Tritium 25.0
% Bias Upper 0.0 Control Limit Lower
-25.0 Control Limit
-50.0
-75.0
-100.0 January 2022- December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 37
FIGURE 4 STRONTIUM-90 PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Strontium-90 Performance Evaluation Results and % Bias 100.0 50.0

Series1

% Bias 0.0 Series2 Series3
-50.0
-100.0 January 2022 - December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 38
FIGURE 5 GROSS ALPHA PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Strontium-90 Performance Evaluation Results and % Bias 100.0 50.0

Series1

% Bias 0.0 Series2 Series3
-50.0
-100.0 January 2022 - December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 39
FIGURE 6 GROSS BETA PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Gross Beta Performance Evaluation Results and % Bias 100.0 50.0
_____.__ Gross Beta
% Bias 0.0 * .~ ~

Upper Control Lower Control

-50.0
-100.0 January 2022 - December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 40
FIGURE 7 IODINE-131 PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Iodine-131 Performance Evaluation Results and % Bias 100.0 75.0 50.0 25.0

Series1

% Bias 0.0 Series2 Series3
-25.0
-50.0
-75.0
-100.0 January 2022- December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 41
FIGURE 8 AMERICIUM-241 PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Iodine-131 Performance Evaluation Results and % Bias 100.0 75.0 50.0 25.0

Series1

% Bias 0.0
~ Series2 Series3
-25.0
-50.0
-75.0
-100.0 January 2022- December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 42
FIGURE 9 PLUTONIUM-238 PERFORMANCE EVALUATION RESULTS AND % BIAS 2022 Plutonium-238 Performance Evaluation Results and % Bias 100.0 75.0 50.0 25.0 -- Plutonium-238
% Bias
~
Upper 0.0 Control Limit Lower
-25.0 Control Limit
-50.0
-75.0
-100.0 January 2022 - December 2022 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 43
TABLE 6 REMP INTRA-LABORATORY DATA
SUMMARY
BIAS AND PRECISION BY MATRIX Bias Criteria (+ / - Precision Criteria (Note 25% 1)
WITHIN OUTSIDE WITHIN OUTSIDE 2022 REMP Intra Laboratory CRITERIA CRITERIA CRITERIA CRITERIA DRINKING WATER Gross Alpha Non Vol Beta 471 0 498 0 LIQUID Gross Alpha Non Vol Beta 181 0 484 0 FILTER Gross A & B 1726 0 1415 0 AIR CHARCOAL Gamma Iodine 131 RAD A-013 1701 0 2570 0 Carbon-14 (Ascarite/Soda Lime Filter per Liter) 155 0 155 0 SOLID LSC Iron-55 30 0 30 0 LSC Nickel 63 25 0 25 0 Tritium 12 0 12 0 VEGETATION Carbon-14 12 0 12 0 LIQUID Tritium 1281 0 1626 0 Gamma Spec Liquid RAD A-013 with Ba, La 434 0 939 0 MILK Gamma Spec Liquid RAD A-013 with Ba, La 209 0 615 0 Gamma Iodine-131 56 0 606 0 Gas Flow Sr 2nd count 209 0 257 0 LIQUID Iodine-131 0 0 341 0 TISSUE Tritium 12 0 12 0 LIQUID Gamma Spec Liquid RAD A-013 with Iodine 119 0 444 0 DRINKING WATER Iodine-131 0 0 199 0 Gamma Spec Liquid RAD A-013 with Ba, La 166 0 282 0 LIQUID Gas Flow Sr 2nd count 83 0 84 0 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 44
VEGETATION Gamma Spec Solid RAD A-013 with Iodine 327 0 467 0 SOLID Gas Flow Sr 2nd count 44 0 54 0 DRINKING WATER Gamma Spec Liquid RAD A-013 with Iodine 0 0 53 0 FILTER Gamma Spec Filter 188 0 395 0 LIQUID LSC Iron-55 74 0 89 0 DRINKING WATER LSC Iron-55 68 0 47 0 LIQUID LSC Nickel 63 69 0 90 0 DRINKING WATER LSC Nickel 63 68 0 47 0 Tritium 146 0 165 0 SOLID Gamma Spec Solid RAD A-013 with Iodine 138 0 239 0 DRINKING WATER Gamma Iodine-131 123 0 145 0 LIQUID Gas Flow Total Strontium 100 0 112 0 DRINKING WATER Gas Flow Total Strontium 100 0 93 0 VEGETATION Gamma Spec Solid RAD A-013 34 0 34 0 FILTER Gas Flow Sr 2nd Count 17 0 22 0 MILK Gas Flow Total Strontium 74 0 69 0 SOLID Gamma Spec Solid RAD A-013 34 8 47 0 TISSUE Gamma Spec Solid RAD A-013 185 0 209 0 Gamma Spec Solid RAD A-013 with Iodine 81 0 86 0 Gas Flow Total Strontium 42 0 42 0 DRINKING WATER Gas Flow Sr 2nd count 7 0 7 0 SOLID Gas Flow Total Strontium 20 0 20 0 GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 45
LIQUID Gamma Spec Liquid RAD A-013 16 0 16 0 VEGETATION Gas Flow Total Strontium 27 0 27 0 Gas Flow Sr 2nd count 19 0 28 0 TISSUE Gas Flow Sr 2nd count 49 0 49 0 TOTAL 8932 12665 Note 1: The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 46
TABLE 7 ALL RADIOLOGICAL INTRA-LABORATORY DATA
SUMMARY
BIAS AND PRECISION BY MATRIX:
2022 Intra Laboratory I Bias Criteria (+ / - 25% Precision Criteria (Note 1) I LIQUID Gas Flow Radium 228 19 0 16 0 DRINKING WATER Gas Flow Radium 228 364 0 387 0 Lucas Cell Radium-226 443 0 465 0 LIQUID Iodine-131 0 0 352 0 DRINKING WATER Tritium 151 0 170 0 AIR CHARCOAL Gamma Iodine 129 52 0 52 0 FILTER Gas Flow Total Strontium 5 0 12 0 LIQUID ICP-MS Uranium-233, 234 in Liquid 48 0 57 0 ICP-MS Uranium-235, 236, 238 Prep in Liquid 45 0 73 0 ICP-MS Uranium-235, 236, 238 in Liquid 58 0 98 0 SOLID Gamma Spec Solid RAD A-013 (pCi/Sample) 57 0 82 0 LIQUID Alpha Spec Polonium 41 0 134 0 SOLID Total Activity, 19 0 31 0 FILTER Gas Flow Lead 210 0 0 22 0 ICP-MS Uranium-234, 235, 236, 238 in Filter 32 0 160 0 LIQUID Gamma Iodine 131 RAD A-013 12 0 12 0 Gross Alpha/Beta 0 0 18 0 DRINKING WATER Gas Flow Strontium 90 68 0 47 0 VEGETATION Tritium 67 0 72 0 LIQUID GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 47
Radium 226 + 228 Sum (Result and TPU only) I 148 I 0 I 167 I 0 FILTER Filter Prep 16 0 60 0 VEGETATION Gas Flow Sr 2nd count 19 0 28 0 TISSUE LSC Plutonium 10 0 10 0 SOLID Gas Flow Strontium 90 26 0 27 0 LIQUID Gamma Spec Drinking Water RAD A-013 16 0 16 0 MILK Gas Flow Strontium 90 41 0 52 0 LIQUID Lucas Cell Radium 226 2344 0 3458 0 Technetium-99 4280 0 4184 0 SOLID LSC Plutonium 1683 0 1762 0 FILTER Alpha Spec U 68 0 320 0 Alpha Spec Uranium 476 0 1053 0 LIQUID LSC Nickel 63 620 0 923 0 FILTER Carbon-14 27 0 538 0 LIQUID Alpha Spec Uranium 3046 0 4469 0 FILTER Gamma Spec Filter RAD A-013 1117 0 1510 0 LIQUID Gas Flow Total Strontium 643 0 758 0 Gas Flow Total Alpha Radium 60 0 56 0 DRINKING WATER LSC Iron-55 68 0 47 0 Gamma Spec Liquid RAD A-013 with Iodine 0 0 53 0 SOLID ICP-MS U-234, 235, 236, 238 Prep per sample 53 0 53 0 LIQUID LSC Calcium 45 70 0 70 0 MILK GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 48
Gamma Spec Liquid RAD A-013 with Ba, La 209 0 615 0 Gamma Iodine-131 56 0 606 0 FILTER Alpha Spec Plutonium 60 0 60 0 Gamma Spec Filter RAD A-013 Direct Count 5 0 48 0 SOLID Tritium 111 0 111 0 DRINKING WATER Gamma Spec Liquid RAD A-013 45 0 45 0 FILTER ICP-MS Tc-99 in Filter 0 0 29 0 DRINKING WATER Alpha Spec Am241 Curium 10 0 10 0 Alpha Spec Plutonium 10 0 10 0 SOLID LSC Calcium 45 5 0 16 0 VEGETATION Alpha Spec Uranium 1 0 11 0 FILTER Gamma I-131, filter 21 0 21 0 VEGETATION Gamma Spec Solid RAD A-013 (pCi/Sample) 11 0 11 0 FILTER Laboratory Sample composite-Filters 0 0 15 0 LIQUID Total Activity, 21 0 31 0 FILTER Carbon-14 Direct Count 0 0 10 0 TISSUE Gas Flow Sr 2nd count 59 0 59 0 VEGETATION Gas Flow Total Strontium 27 0 27 0 TOTAL 128585 162627 Note 1: The RPD must be 20 percent or less, if both samples are greater than 5 times the MDC. If both results are less than 5 times MDC, then the RPD must be equal to or less than 100%. If one result is above the MDC and the other is below the MDC, then the RPD can be calculated using the MDC for the result of the one below the MDC. The RPD must be 100% or less. In the situation where both results are above the MDC but one result is greater than 5 times the MDC and the other is less than 5 times the MDC, the RPD must be less than or equal to 20%. If both results are below MDC, then the limits on % RPD are not applicable.
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 49
TABLE 8 2022 CORRECTIVE ACTION REPORT
SUMMARY
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 50
CORRECTIVE ACTION
& DISPOSITION PE FAILURE Summary of RAD-128 Drinking Water Study Unacceptable Ratings Containment Actions, if any:
Acceptance Radium-226: The laboratory reviewed Sample ID Parm Reported Value Reference Value Range the data of the original analysis, and no anomalies were noted. A review of the sample preparation processes and Naturals Radium-226 12.6 pCi/L 9.53 pCi/L 7.14-11.1 pCi/L data set did not reveal any errors or possible contributors to the high bias.
The sample was reanalyzed, and the Radium-228 result was within the acceptance Naturals 11.5 pCi/L 8.71 pCi/L 5.59-11.0 pCi/L (9320) range demonstrating that the process is under control and the unacceptable result is due to an unknown error.
Strontium 89/90 Strontium-89 77.7 pCi/L 65.0 pCi/L 52.7-73.0 pCi/L Radium-228: The Batch data was reviewed by the laboratory, and it was noted that initial counts of the sample preparations were within the acceptance range but were recounted due to a high Relative Percent Difference (RPD). The sample was reanalyzed, and the results were within the acceptance range; therefore, an unidentified error occurred during the initial process.
Strontium-89: The result for Strontium-89 was 120% of the known value with the acceptance range limit of 112%. The laboratory reviewed the method for possible contributors to the bias and no anomalies were noted.
The LCS trend charts and calibration were review and no errors were found.
Due to the short half-life of Sr-89, the sample could not be reanalyzed for confirmation.
Root Causes:
The laboratory could not definitively identify the cause of the high bias in the results for these parameters.
The lab will continue to monitor the recoveries of these parameters to ensure that there are no continued issues. The laboratory met acceptance criteria for these isotopes during the next RAD study (RAD 129)
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 51
CORRECTIVE ACTION
& DISPOSITION PE FAILURE Containment Actions, if any:
Acceptance Sample ID Parm Reported Value Reference Value Range Upon receipt of the PT report, an investigation was initiated by the MAPEP-22-MaS46 Fe-55 725 Bq/kg 1100 Bq/kg 770-1430 Bq/kg Quality Department and a Corrective (Radiological) Tc-99 506 Bq/kg 778 Bq/kg 545-1011 Bq/kg Action (CARR) team assembled. The team consisted of representatives from the affected areas. The sample 0.552-1.026 preparation and analytical processes MAPEP-22-RdV46 Sr-90 1.12 Bq/sample 0.789 Bq/sample Bq/sample were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and interviews with the analysts.
The investigation determined that the laboratory met all quality control criteria specified in each method. Additionally, all internal procedures and policies were performed as required. These failures were tracked through GELs internal non-conformance system.
Root Cause(s):
MAPEP-22-MaS46 (Radiological):
Fe-55:
The laboratory reviewed the data and noted that the tracer recoveries for this analysis were higher than typical soil tracer recoveries. The higher tracer recoveries possibly contributed to the low bias seen in the result.
Tc-99:
The laboratory reviewed both the inorganic and radiological data for contributors to the low bias. Both analyses include the addition of Hydrofluoric Acid to the 1M Hydrochloric leach process. The laboratory has concluded that since both the reported results were low, the HF leach may not have been performed long enough for the HF to effectively isolate the Technetium.
MAPEP-22-RdV46:
The data for the Sr-90 analysis was reviewed and no anomalies were noted. The QC in the analysis batch met acceptance criteria. The laboratory evaluated both the prep GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 52
and instrument processes for possible areas of contamination that contributed to the positive bias. A definitive source was not determined.
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 53
CORRECTIVE ACTION
& DISPOSITION PE FAILURE Containment Acceptance Actions, if any:
Sample ID Parm Reported Value Reference Value Range Upon receipt of the PT MAPEP-22-MaS47 U-234 88.9 Bq/kg 50.8 Bq/kg 35.6-66.0 Bq/kg report, an investigation (Radiological) U-238 (W) 196 Bq/kg 157 Bq/kg 110-204 Bq/kg was initiated by the Quality Department and a Corrective Action (CARR) team assembled. The team consisted of representatives from the affected areas. The sample preparation and analytical processes were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and interviews with the analysts.
The investigation determined that the laboratory met all quality control criteria specified in each method.
Additionally, all internal procedures and policies were performed as required.
These failures were tracked through GELs internal non-conformance system.
A review of the spectral data and calculations was performed, and no errors were found. A recount of the samples was performed to see if there were any counting issues that would result in the higher bias. Recount data verified original results. A reanalysis was performed via alpha spec, utilizing an HF, HNO3, HCL complete digestion procedure (GEL-RAD-A-011). Reanalysis results averaged between 83%-104% for U-234 and 92%-102% for U-238.
Possible issues with original analysis could include: analyst errors in tracing or aliquoting, tracer low bias (a different secondary tracer was used on the reanalysis, however control charts of the original tracer indicated no bias), or possible contamination issues from the NaOH fusion method (original prep) and/or the crucibles used for the fusion. Although contamination is a probable cause, the batch blank gave no indication of a contamination issues. A review of the cleaning procedure for the crucibles was performed and no issues were identified .
GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 54
Root Cause(s):
The laboratory could not definitively identify the cause of the high bias in the results for these parameters. The lab will continue to monitor the recoveries of these parameters in all methods to ensure that there are no continued issues..
Containment Actions, if any:
Upon receipt of the PT Sample ID Parm Reported Value Reference Value Acceptance Range report, an investigation was initiated by the Quality MRAD 37 Department and a Strontium-90 4560 pCi/kg 2960 pCi/kg 1670-3860 pCi/L Vegetation Corrective Action (CARR) team assembled. The team consisted of MRAD 37 representatives from the Strontium-90 283 pCi/L 224 pCi/L 161-277 pCi/L Water affected areas. The sample preparation and analytical processes were reviewed. This included review of reagents and standards used in the sample preparation steps, calibration records, process control samples, and interviews with the analysts.
The investigation determined that the laboratory met all quality control criteria specified in each method.
Additionally, all internal procedures and policies were performed as required. These failures were tracked through GELs internal non-conformance system The lab will continue to monitor the recoveries of these parameters to ensure that there are no continued issues. During the analysis time period for MRAD-37, the laboratory successfully completed the analysis of Strontium-90 in these matrices in PT study MAPEP-47. In which, the samples were prepared and analyzed by the same processes and procedures GEL Laboratories uc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F 843,766.1178 www.gel.com Page 55
Appendix B Environmental Dosimetry Company Annual Quality Assurance Status Report January - December 2022
ENVIRONMENTAL DOSIMETRY COMPANY ANNUAL QUALITY ASSURANCE STATUS REPORT January - December 2022 Prepared By:
~ - d.r&od Date: J/2 i /_2--?...
Approved By: ~)edlGL!L Date: ?. /av;/>>- s Environmental Dosimetry Company 10 Ashton Lane Sterling, MA 01564
TABLE OF CONTENTS Page LIST OF TABLES ....................................................................................................................... iii EXECUTIVE
SUMMARY
............................................................................................................ iv I. INTRODUCTION ............................................................................................................ 1 A. QC Program........................................................................................................ 1 B. QA Program ........................................................................................................ 1 II. PERFORMANCE EVALUATION CRITERIA ................................................................... 1 A. Acceptance Criteria for Internal Evaluations........................................................ 1 B. QC Investigation Criteria and Result Reporting ................................................... 3 C. Reporting of Environmental Dosimetry Results to EDC Customers ..................... 3 III. DATA
SUMMARY
FOR ISSUANCE PERIOD JANUARY-DECEMBER 2022 ................. 3 A. General Discussion ............................................................................................. 3 B. Result Trending .................................................................................................. 4 IV. STATUS OF EDC CONDITION REPORTS (CR) ........................................................... 4 V. STATUS OF AUDITS/ASSESSMENTS .......................................................................... 4 A. Internal................................................................................................................ 4 B. External .............................................................................................................. 4 VI. PROCEDURES AND MANUALS REVISED DURING JANUARY - DECEMBER 2022 ... 4 VII. CONCLUSION AND RECOMMENDATIONS ................................................................. 4 VIII. REFERENCES ............................................................................................................... 4 APPENDIX A DOSIMETRY QUALITY CONTROL TRENDING GRAPHS LIST OF TABLES Page
1. Percentage of Individual Analyses Which Passed EDC Internal Criteria, January - December 2022 5
2. Mean Dosimeter Analyses (n=6), January - December 2022 5
3. Summary of Independent QC Results for 2022 5
-ii-
EXECUTIVE
SUMMARY
Routine quality control (QC) testing was performed for dosimeters issued by the Environmental Dosimetry Company (EDC) .
During this annual period100% (72/72) of the individual dosimeters, evaluated against the EDC internal performance acceptance criteria (high-energy photons only), met the criterion for accuracy and 100% (72/72) met the criterion for precision (Table 1). In addition, 100% (12/12) of the dosimeter sets evaluated against the internal tolerance limits met EDC acceptance criteria (Table 2) and 100% (6/6) of independent testing passed the performance criteria (Table 3). Trending graphs, which evaluate performance statistic for high-energy photon irradiations and co-located stations are given in Appendix A.
One internal assessment was performed in 2022.There were no findings.
I. INTRODUCTION The TLD systems at the Environmental Dosimetry Company (EDC) are calibrated and operated to ensure consistent and accurate evaluation of TLDs. The quality of the dosimetric results reported to EDC clients is ensured by in-house performance testing and independent performance testing by EDC clients, and both internal and client directed program assessments.
The purpose of the dosimetry quality assurance program is to provide performance documentation of the routine processing of EDC dosimeters. Performance testing provides a statistical measure of the bias and precision of dosimetry processing against a reliable standard, which in turn points out any trends or performance changes. Two programs are used:
A. QC Program Dosimetry quality control tests are performed on EDC Panasonic 814 Environmental dosimeters. These tests include: (1) the in-house testing program coordinated by the EDC QA Officer and (2) independent test perform by EDC clients. In-house test are performed using six pairs of 814 dosimeters, a pair is reported as an individual result and six pairs are reported as the mean result.
Results of these tests are described in this report.
Excluded from this report are instrumentation checks. Although instrumentation checks represent an important aspect of the quality assurance program, they are not included as process checks in this report. Instrumentation checks represent between 5-10% of the TLDs processed.
B. QA Program An internal assessment of dosimetry activities is conducted annually by the Quality Assurance Officer (Reference 1). The purpose of the assessment is to review procedures, results, materials or components to identify opportunities to improve or enhance processes and/or services.
II. PERFORMANCE EVALUATION CRITERIA A. Acceptance Criteria for Internal Evaluations
1. Bias For each dosimeter tested, the measure of bias is the percent deviation of the reported result relative to the delivered exposure. The percent deviation relative to the delivered exposure is calculated as follows:
Hi Hi 100 Hi where:
Hi = the corresponding reported exposure for the ith dosimeter (i.e., the reported exposure)
Hi = the exposure delivered to the ith irradiated dosimeter (i.e., the delivered exposure) 1of 6
2. Mean Bias For each group of test dosimeters, the mean bias is the average percent deviation of the reported result relative to the delivered exposure. The mean percent deviation relative to the delivered exposure is calculated as follows:
Hi Hi 1 100 n
Hi where:
Hi = the corresponding reported exposure for the ith dosimeter (i.e., the reported exposure)
Hi = the exposure delivered to the ith irradiated test dosimeter (i.e., the delivered exposure) n = the number of dosimeters in the test group Precision For a group of test dosimeters irradiated to a given exposure, the measure of precision is the percent deviation of individual results relative to the mean reported exposure. At least two values are required for the determination of precision. The measure of precision for the ith dosimeter is:
Hi H 100 H
where:
Hi = the reported exposure for the ith dosimeter (i.e., the reported exposure) 1 H = the mean reported exposure; i.e., H Hi n
n = the number of dosimeters in the test group
3. EDC Internal Tolerance Limits All evaluation criteria are taken from the EDC Quality System Manual, (Reference 2). These criteria are only applied to individual test dosimeters irradiated with high-energy photons (Cs-137) and are as follows for Panasonic Environmental dosimeters: +/- 15% for bias and +/-
12.8% for precision.
2of 6
B. QC Investigation Criteria and Result Reporting EDC Quality System Manual (Reference 2) specifies when an investigation is required due to a QC analysis that has failed the EDC bias criteria. The criteria are as follows:
1. No investigation is necessary when an individual QC result falls outside the QC performance criteria for accuracy.
2. Investigations are initiated when the mean of a QC processing batch is outside the performance criterion for bias.
C. Reporting of Environmental Dosimetry Results to EDC Customers
1. All results are to be reported in a timely fashion.
4. If the QA Officer determines that an investigation is required for a process, the results shall be issued as normal. If the QC results prompting the investigation have a mean bias from the known of greater than +/-20%, the results shall be issued with a note indicating that they may be updated in the future, pending resolution of a QA issue.
5. Environmental dosimetry results do not require updating if the investigation has shown that the mean bias between the original results and the corrected results, based on applicable correction factors from the investigation, does not exceed +/-20%.
III. DATA
SUMMARY
FOR ISSUANCE PERIOD JANUARY-DECEMBER 2022 A. General Discussion Results of performance tests conducted are summarized and discussed in the following sections. Summaries of the performance tests for the reporting period are given in Tables 1 through 3 and Figures 1 through 4.
Table 1 provides a summary of individual dosimeter results evaluated against the EDC internal acceptance criteria for high-energy photons only. During this period100% (72/72) of the individual dosimeters, evaluated against these criteria, met the tolerance limits for accuracy and 100% (72/72) met the criterion for precision. A graphical interpretation is provided in Figures 1 and 2.
Table 2 provides the bias and standard deviation results for each group (N=6) of dosimeters evaluated against the internal tolerance criteria. Overall,100% (12/12) of the dosimeter sets, evaluated against the internal tolerance performance criteria, met these criteria. A graphical interpretation is provided in Figure 3.
Table 3 presents the independent blind spike results for dosimeters processed during this annual period. All results passed the performance acceptance criterion. Figure 4 is a graphical interpretation of Seabrook Station blind co-located station results.
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B. Result Trending One of the main benefits of performing quality control tests on a routine basis is to identify trends or performance changes. The results of the Panasonic environmental dosimeter performance tests are presented in Appendix A. The results are evaluated against each of the performance criteria listed in Section II, namely: individual dosimeter accuracy, individual dosimeter precision, and mean bias.
All of the results presented in Appendix A are plotted sequentially by processing date.
IV. STATUS OF EDC CONDITION REPORTS (CR)
No condition reports were issued during this annual period.
V. STATUS OF AUDITS/ASSESSMENTS
1. Internal EDC Internal Quality Assurance Assessment was conducted during the fourth quarter 2022. There were no findings identified.
2. External None.
VI. PROCEDURES AND MANUALS REVISED DURING JANUARY - DECEMBER 2022 Two procedures were reissued with no changes as part of the 5 year review cycle.
VII. CONCLUSION AND RECOMMENDATIONS The quality control evaluations continue to indicate the dosimetry processing programs at the EDC satisfy the criteria specified in the Quality System Manual. The EDC demonstrated the ability to meet all applicable acceptance criteria.
VIII. REFERENCES
1. EDC Quality Control and Audit Assessment Schedule, 2022.
2. EDC Manual 1, Quality System Manual, Rev. 4, September 28, 2020.
4of 6
TABLE 1 PERCENTAGE OF INDIVIDUAL DOSIMETERS THAT PASSED EDC INTERNAL CRITERIA JANUARY - DECEMBER 2022(1), (2)
Number % Passed Precision Dosimeter Type % Passed Bias Criteria Tested Criteria Panasonic Environmental 72 100 100 (1)
This table summarizes results of tests conducted by EDC.
(2)
Environmental dosimeter results are free in air.
TABLE 2 MEAN DOSIMETER ANALYSES (N=6)
JANUARY - DECEMBER 2022(1), (2)
Standard Tolerance Process Date Exposure Level Mean Bias %
Deviation % Limit +/-15%
4/25/2022 43 1.2 1.8 Pass 4/27/2022 62 6.2 1.0 Pass 5/05/2022 99 2.3 0.7 Pass 7/26/2022 34 -2.6 1.2 Pass 7/27/2022 81 0.6 1.7 Pass 8/07/2022 107 -3.5 0.7 Pass 10/27/2022 52 1.8 0.9 Pass 11/02/2022 76 2.0 0.9 Pass 11/07/2022 27 7.0 0.7 Pass 01/24/2023 38 1.5 1.7 Pass 01/26/2023 115 -0.3 2.0 Pass 02/14/2023 49 2.3 4.0 Pass (1)
This table summarizes results of tests conducted by EDC for TLDs issued in 2022.
(2)
Environmental dosimeter results are free in air.
TABLE 3
SUMMARY
OF INDEPENDENT DOSIMETER TESTING JANUARY - DECEMBER 2022(1), (2)
Mean Standard Issuance Period Client Deviation % Pass / Fail Bias %
st 1 Qtr. 2022 Millstone -0.6 0.6 Pass 2nd Qtr.2022 Millstone -3.9 1.0 Pass 3rd Qtr. 2022 Millstone 0.1 0.5 Pass 4th Qtr.2022 Millstone -2.6 1.2 Pass 4th Qtr.2022 PSEG(PNNL) 48mR 1.1 1.5 Pass 4th Qtr.2022 PSEG(PNNL) 95mR 0.7 0.3 Pass 4th Qtr.2022 PSEG(PNNL) 143mR 2.3 0.8 Pass 4th Qtr.2022 PSEG(PNNL) 190mR 1.4 0.8 Pass 4th Qtr.2022 SONGS -5.6 1.1 Pass (1)
Performance criteria are +/- 15%.
(2)
Blind spike irradiations using Cs-137 5of 6
APPENDIX A DOSIMETRY QUALITY CONTROL TRENDING GRAPHS ISSUE PERIOD JANAURY - DECEMBER 2022 6of 6
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ENCLOSURE 2 2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ,
Supplemental Information 2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM UPDATES JANUARY 1 - DECEMBER 31, 2021 6 Pages Follow
2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT 7 ENVIRONMENTAL SAMPLING MODIFICATIONS 7.1 Program Modifications There were no programmatic changes to environmental sampling in 2021.
7.2 Change of Sampling Procedures There were no changes to sampling procedures in 2021.
7.3 Change of Analysis Procedures There were no changes to the analysis procedures in 2021.
7.4 Sample Deviations and Unavailable Analyses Table 7.4-1 lists the deviations from the required REMP sample collection in 2021. Despite these sample deviations, 99.5 percent of the required samples were successfully obtained and analyzed.
Table 7.4-1: Sample Deviations and Unavailable Analyses Collection Reason for not Sample Corrective Condition Analysis Location Date or conducting REMP Type I Gamma I I Period Composite -
I as required I Action Sample I Report Unsafe condition for Surface Isotopic Gamma: Jan, obtained M-8C sampling due frozen 501000047555 Water Feb, Dec when water Tritium river surface 20211 thawed Due to river conditions, Additional Gamma M-8C, M- electrofishing could bass were Fish July 2021 501000055871 Isotopic 9 not be conducted to collected obtain shorthead instead redhorse samples Initiated a search, re-Quarter 4 2021 secured TLD Direct TLD M05S (Oct through TLD was missing holder caps 501000059469 Radiation Dec 2021) for replacement TLD Air sampler found Gamma Restarted not running due to Isotopic, sampler and GFCI trip. Restarted Iodine- verified August 18-25 sampler and verified Air 131, M-1 running. 501000055461 2021 running. Any partial Gross Results are sample is Beta, still reported considered a Tritium in Section 10.
missing sample.
Notes:
1 January and February samples could not be collected, but samples were collected in March. The quarterly composite for tritium therefore only includes March. For the quarter 4 composite sample, data was only collected for October and November.
arcadis.com 37
2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT AIRBORNE CARTRIDGE: RADIOIODINE Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 1/6/2021 3.05E-04 +/- 8.05E-03 -6.27E-04 +/- 6.35E-03 3.88E-03 +/- 8.33E-03 7.97E-03 +/- 1.25E-02 1.41E-03 +/- 9.36E-03 U U U U U 1/13/2021 4.18E-03 +/- 7.06E-03 -6.62E-03 +/- 6.84E-03 -2.86E-03 +/- 5.16E-03 -5.44E-03 +/- 7.38E-03 -2.49E-03 +/- 7.53E-03 U U U U U 1/20/2021 -2.27E-04 +/- 7.85E-03 -1.69E-03 +/- 5.37E-03 6.62E-03 +/- 7.37E-03 -3.74E-04 +/- 7.91E-03 7.39E-04 +/- 6.47E-03 U U U U U 1/27/2021 7.11E-03 +/- 9.27E-03 1.59E-03 +/- 1.08E-02 -3.73E-03 +/- 9.08E-03 -4.42E-03 +/- 9.90E-03 -9.63E-04 +/- 9.66E-03 U U U U U 2/3/2021 3.58E-03 +/- 5.33E-03 2.21E-03 +/- 4.51E-03 -4.56E-03 +/- 5.45E-03 1.01E-03 +/- 8.41E-03 -1.69E-03 +/- 7.06E-03 U U U U U 2/10/2021 2.57E-03 +/- 6.82E-03 -1.39E-03 +/- 1.03E-02 2.47E-03 +/- 7.53E-03 5.29E-03 +/- 6.67E-03 3.12E-03 +/- 7.23E-03 U U U U U 2/17/2021 -2.03E-03 +/- 5.16E-03 -2.41E-03 +/- 6.48E-03 6.40E-03 +/- 7.24E-03 -5.56E-03 +/- 1.09E-02 -6.34E-03 +/- 5.61E-03 U U U U U 2/24/2021 5.21E-04 +/- 7.67E-03 -8.27E-03 +/- 1.27E-02 7.72E-03 +/- 9.29E-03 2.30E-03 +/- 1.44E-02 1.16E-03 +/- 1.25E-02 U U U U U 3/3/2021 2.18E-03 +/- 9.20E-03 1.48E-03 +/- 8.27E-03 -1.11E-04 +/- 5.77E-03 4.85E-03 +/- 8.26E-03 1.23E-02 +/- 8.70E-03 U U U U UI 3/10/2021 4.53E-03 +/- 7.65E-03 7.45E-03 +/- 8.52E-03 -4.71E-03 +/- 1.00E-02 -7.11E-03 +/- 9.82E-03 -2.47E-04 +/- 8.49E-03 U U U U U 3/17/2021 4.80E-03 +/- 1.08E-02 6.85E-03 +/- 9.20E-03 -1.52E-03 +/- 1.32E-02 2.05E-03 +/- 9.11E-03 5.72E-03 +/- 1.37E-02 U U U U U 3/24/2021 -1.17E-03 +/- 5.75E-03 -3.36E-03 +/- 9.41E-03 -4.45E-03 +/- 5.74E-03 3.20E-03 +/- 9.23E-03 -2.67E-03 +/- 8.10E-03 U U U U U 3/30/2021 4.67E-03 +/- 9.67E-03 2.39E-04 +/- 9.08E-03 6.07E-04 +/- 1.02E-02 -1.06E-03 +/- 9.22E-03 6.28E-03 +/- 8.27E-03 U U U U U 4/7/2021 -4.48E-03 +/- 6.29E-03 8.59E-03 +/- 8.48E-03 2.24E-03 +/- 9.41E-03 -5.72E-03 +/- 9.65E-03 -1.72E-03 +/- 8.98E-03 U U U U U 4/14/2021 -2.08E-02 +/- 1.54E-02 7.66E-03 +/- 1.07E-02 4.22E-03 +/- 8.89E-03 -6.17E-03 +/- 1.46E-02 3.04E-03 +/- 1.03E-02 U U U U U 4/21/2021 5.07E-03 +/- 7.30E-03 2.97E-03 +/- 1.18E-02 -4.07E-03 +/- 8.65E-03 -3.49E-03 +/- 7.09E-03 -8.68E-04 +/- 7.29E-03 U U U U U 4/27/2021 2.18E-03 +/- 1.71E-02 -1.11E-02 +/- 1.40E-02 -2.80E-03 +/- 1.41E-02 1.03E-02 +/- 1.04E-02 -7.16E-03 +/- 2.28E-02 U U U U U 5/5/2021 0.00E+00 +/- 8.23E-03 -1.62E-03 +/- 8.75E-03 -1.63E-03 +/- 1.17E-02 1.34E-02 +/- 1.76E-02 -4.87E-03 +/- 9.16E-03 U U U U U 5/12/2021 1.40E-03 +/- 9.10E-03 -1.35E-03 +/- 8.16E-03 -7.75E-04 +/- 5.73E-03 -7.05E-04 +/- 8.25E-03 -1.50E-03 +/- 7.20E-03 U U U U U 5/19/2021 5.93E-03 +/- 9.99E-03 3.91E-03 +/- 9.35E-03 4.87E-03 +/- 6.21E-03 1.04E-02 +/- 1.51E-02 -1.81E-03 +/- 1.02E-02 U U U U U 5/26/2021 3.84E-03 +/- 1.64E-02 -1.06E-03 +/- 1.30E-02 -1.36E-02 +/- 1.89E-02 6.22E-03 +/- 9.79E-03 6.85E-03 +/- 7.09E-03 U U U U U 6/2/2021 1.18E-02 +/- 1.19E-02 -4.32E-03 +/- 1.40E-02 -4.41E-03 +/- 1.47E-02 -7.75E-03 +/- 9.99E-03 7.25E-03 +/- 1.69E-02 U U U U U 6/9/2021 -7.08E-03 +/- 1.10E-02 -2.94E-04 +/- 1.28E-02 4.35E-03 +/- 8.82E-03 -4.26E-04 +/- 9.58E-03 -7.93E-03 +/- 1.82E-02 U U U U U 6/16/2021 -2.34E-03 +/- 1.27E-02 -3.17E-04 +/- 1.50E-02 -2.31E-03 +/- 8.18E-03 1.20E-03 +/- 1.71E-02 2.30E-03 +/- 1.12E-02 U U U U U 6/23/2021 4.20E-04 +/- 7.47E-03 2.22E-03 +/- 1.16E-02 -4.29E-06 +/- 7.23E-03 3.80E-03 +/- 8.16E-03 4.36E-03 +/- 8.90E-03 U U U U U 6/29/2021 1.39E-03 +/- 7.08E-03 1.14E-03 +/- 1.07E-02 4.91E-03 +/- 9.50E-03 -3.14E-03 +/- 1.32E-02 -1.98E-04 +/- 8.53E-03 U U U U U 7/6/2021 4.64E-03 +/- 6.49E-03 -2.97E-03 +/- 9.61E-03 5.26E-03 +/- 8.01E-03 1.80E-03 +/- 5.88E-03 4.05E-03 +/- 8.81E-03 U U U U U 7/21/2021 -2.72E-03 +/- 6.65E-03 3.10E-03 +/- 7.49E-03 7.45E-03 +/- 9.08E-03 3.44E-03 +/- 5.83E-03 9.11E-04 +/- 7.87E-03 U U U U U 7/28/2021 6.64E-03 +/- 9.11E-03 1.26E-02 +/- 1.26E-02 -3.13E-03 +/- 8.46E-03 2.11E-02 +/- 2.06E-02 1.81E-05 +/- 1.36E-02 U U U U U 8/4/2021 1.35E-03 +/- 1.18E-02 4.97E-05 +/- 8.81E-03 6.82E-04 +/- 9.29E-03 -2.62E-03 +/- 1.03E-02 -1.11E-02 +/- 2.19E-02 U U U U U arcadis.com 48
2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 8/11/2021 -1.28E-02 +/- 1.49E-02 5.76E-04 +/- 7.80E-03 6.99E-03 +/- 8.50E-03 -1.04E-03 +/- 7.81E-03 3.07E-04 +/- 1.03E-02 U U U U U 8/18/2021 3.83E-03 +/- 9.82E-03 3.58E-03 +/- 7.18E-03 -4.43E-03 +/- 5.63E-03 -6.65E-03 +/- 6.03E-03 -1.83E-03 +/- 1.77E-02 U U U U U 8/25/2021 3.36E-03 +/- 9.04E-03 -5.14E-03 +/- 7.02E-03 3.56E-03 +/- 7.74E-03 -6.43E-03 +/- 5.53E-03 6.72E-03 +/- 8.02E-03 U* U U U U 9/1/2021 1.37E-03 +/- 6.55E-03 -3.62E-03 +/- 7.07E-03 6.19E-05 +/- 1.10E-02 7.10E-03 +/- 5.91E-03 4.08E-03 +/- 6.27E-03 U U U U U 9/8/2021 2.14E-03 +/- 1.14E-02 3.74E-03 +/- 6.79E-03 -2.90E-03 +/- 7.68E-03 9.19E-03 +/- 1.09E-02 -7.26E-03 +/- 8.98E-03 U U U U U 9/15/2021 7.09E-05 +/- 7.45E-03 -2.33E-03 +/- 6.76E-03 3.85E-03 +/- 9.75E-03 -2.07E-03 +/- 8.48E-03 7.38E-03 +/- 7.71E-03 U U U U U 9/22/2021 -4.14E-03 +/- 6.61E-03 -1.45E-03 +/- 7.29E-03 -2.05E-03 +/- 5.67E-03 -2.79E-03 +/- 7.65E-03 3.10E-03 +/- 1.09E-02 U U U U U 9/28/2021 2.09E-03 +/- 6.95E-03 2.60E-04 +/- 1.25E-02 5.48E-03 +/- 1.15E-02 8.61E-03 +/- 9.07E-03 -9.16E-03 +/- 8.96E-03 U U U UI U 10/6/2021 -1.13E-03 +/- 7.90E-03 -2.34E-03 +/- 1.08E-02 3.10E-03 +/- 8.39E-03 7.36E-03 +/- 9.00E-03 -1.09E-05 +/- 7.70E-03 U U U U U 10/12/2021 1.43E-03 +/- 8.94E-03 5.00E-05 +/- 9.77E-03 -1.26E-03 +/- 7.84E-03 1.53E-03 +/- 8.19E-03 3.76E-03 +/- 9.15E-03 U U U U U 10/19/2021 -9.62E-04 +/- 7.29E-03 1.83E-03 +/- 9.87E-03 -3.28E-03 +/- 7.65E-03 -3.56E-04 +/- 5.96E-03 1.49E-02 +/- 1.60E-02 U U U U UI 10/26/2021 -5.82E-03 +/- 1.50E-02 -5.16E-03 +/- 1.26E-02 -2.57E-03 +/- 1.34E-02 -1.02E-02 +/- 2.19E-02 9.15E-03 +/- 1.34E-02 U U U U U 11/3/2021 1.83E-03 +/- 9.94E-03 1.83E-03 +/- 8.50E-03 3.65E-03 +/- 7.35E-03 -2.44E-03 +/- 9.05E-03 1.17E-03 +/- 7.77E-03 U U U U U 11/10/2021 -4.96E-04 +/- 6.44E-03 8.94E-05 +/- 6.15E-03 -3.45E-03 +/- 7.85E-03 -7.94E-04 +/- 8.41E-03 1.09E-04 +/- 7.05E-03 U U U U U 11/16/2021 -7.96E-04 +/- 7.78E-03 1.69E-03 +/- 9.20E-03 5.61E-03 +/- 1.08E-02 -4.54E-03 +/- 9.30E-03 -2.32E-03 +/- 7.41E-03 U U U U U 11/23/2021 -1.99E-03 +/- 9.68E-03 -2.46E-03 +/- 7.29E-03 -2.20E-04 +/- 8.01E-03 7.50E-03 +/- 2.23E-02 -3.07E-03 +/- 8.00E-03 U U U U U 7/14/2021 -7.38E-04 +/- 6.43E-03 -4.91E-03 +/- 7.60E-03 -1.66E-03 +/- 6.26E-03 1.99E-03 +/- 6.55E-03 -2.48E-03 +/- 1.35E-02 U U U U U 11/30/2021 -3.22E-03 +/- 8.64E-03 -2.39E-03 +/- 6.45E-03 -8.27E-04 +/- 7.14E-03 -1.42E-03 +/- 7.19E-03 1.69E-03 +/- 8.63E-03 U U U U U 12/8/2021 -4.37E-03 +/- 1.07E-02 -1.53E-03 +/- 1.85E-02 2.78E-03 +/- 8.10E-03 -2.37E-03 +/- 1.58E-02 4.97E-03 +/- 1.06E-02 U U U U U 12/15/2021 -1.78E-03 +/- 6.88E-03 -6.43E-04 +/- 6.47E-03 -2.29E-04 +/- 6.99E-03 2.39E-03 +/- 6.57E-03 2.18E-03 +/- 5.25E-03 U U U U U 12/21/2021 5.44E-03 +/- 1.09E-02 3.26E-03 +/- 1.02E-02 7.18E-04 +/- 9.69E-03 8.65E-03 +/- 2.01E-02 -7.16E-03 +/- 1.01E-02 U U U U U 12/28/2021 5.03E-03 +/- 1.54E-02 1.01E-02 +/- 2.99E-02 1.92E-02 +/- 2.11E-02 1.43E-03 +/- 1.92E-02 9.60E-03 +/- 1.73E-02 U U U U U
Partial sample for Air Station M-1 during week of August 18 through 25, 2021.
arcadis.com 49
2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT AIRBORNE PARTICULATES: GROSS BETA Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 1/6/2021 0.075 +/- 0.006 0.082 +/- 0.007 0.080 +/- 0.007 0.082 +/- 0.007 0.091 +/- 0.007 1/13/2021 0.066 +/- 0.006 0.058 +/- 0.006 0.057 +/- 0.006 0.064 +/- 0.006 0.068 +/- 0.007 1/20/2021 0.056 +/- 0.006 0.057 +/- 0.006 0.059 +/- 0.006 0.057 +/- 0.006 0.058 +/- 0.006 1/27/2021 0.034 +/- 0.004 0.035 +/- 0.005 0.030 +/- 0.004 0.028 +/- 0.004 0.032 +/- 0.004 2/3/2021 0.056 +/- 0.006 0.048 +/- 0.005 0.051 +/- 0.005 0.057 +/- 0.006 0.059 +/- 0.006 2/10/2021 0.052 +/- 0.005 0.058 +/- 0.006 0.061 +/- 0.006 0.058 +/- 0.006 0.058 +/- 0.006 2/17/2021 0.051 +/- 0.005 0.056 +/- 0.006 0.050 +/- 0.005 0.053 +/- 0.006 0.062 +/- 0.006 2/24/2021 0.076 +/- 0.006 0.089 +/- 0.007 0.085 +/- 0.007 0.100 +/- 0.008 0.102 +/- 0.008 3/3/2021 0.038 +/- 0.005 0.036 +/- 0.005 0.040 +/- 0.005 0.043 +/- 0.005 0.043 +/- 0.005 3/10/2021 0.043 +/- 0.005 0.051 +/- 0.006 0.043 +/- 0.005 0.050 +/- 0.006 0.045 +/- 0.005 3/17/2021 0.036 +/- 0.005 0.037 +/- 0.005 0.033 +/- 0.004 0.036 +/- 0.005 0.037 +/- 0.005 3/24/2021 0.034 +/- 0.004 0.034 +/- 0.005 0.029 +/- 0.004 0.040 +/- 0.005 0.038 +/- 0.005 3/30/2021 0.027 +/- 0.004 0.031 +/- 0.005 0.031 +/- 0.005 0.036 +/- 0.005 0.037 +/- 0.005 4/7/2021 0.049 +/- 0.005 0.053 +/- 0.006 0.045 +/- 0.005 0.045 +/- 0.005 0.050 +/- 0.005 4/14/2021 0.011 +/- 0.003 0.009 +/- 0.003 0.009 +/- 0.003 0.009 +/- 0.003 0.012 +/- 0.003 M M M 4/21/2021 0.025 +/- 0.004 0.029 +/- 0.004 0.029 +/- 0.004 0.029 +/- 0.004 0.026 +/- 0.004 4/27/2021 0.038 +/- 0.005 0.041 +/- 0.005 0.046 +/- 0.006 0.043 +/- 0.005 0.039 +/- 0.005 5/5/2021 0.030 +/- 0.004 0.029 +/- 0.004 0.028 +/- 0.004 0.030 +/- 0.004 0.034 +/- 0.005 5/12/2021 0.017 +/- 0.003 0.020 +/- 0.004 0.021 +/- 0.004 0.023 +/- 0.004 0.016 +/- 0.003 5/19/2021 0.031 +/- 0.004 0.034 +/- 0.005 0.027 +/- 0.004 0.032 +/- 0.004 0.031 +/- 0.004 5/26/2021 0.024 +/- 0.004 0.019 +/- 0.004 0.021 +/- 0.004 0.022 +/- 0.004 0.023 +/- 0.004 6/2/2021 0.022 +/- 0.004 0.023 +/- 0.004 0.025 +/- 0.004 0.019 +/- 0.003 0.023 +/- 0.004 6/9/2021 0.039 +/- 0.005 0.041 +/- 0.005 0.039 +/- 0.005 0.036 +/- 0.005 0.041 +/- 0.005 6/16/2021 0.027 +/- 0.004 0.026 +/- 0.004 0.026 +/- 0.004 0.025 +/- 0.004 0.029 +/- 0.004 6/23/2021 0.021 +/- 0.004 0.020 +/- 0.004 0.021 +/- 0.004 0.019 +/- 0.004 0.022 +/- 0.004 6/29/2021 0.032 +/- 0.005 0.036 +/- 0.006 0.027 +/- 0.005 0.033 +/- 0.005 0.032 +/- 0.005 7/6/2021 0.041 +/- 0.005 0.038 +/- 0.005 0.036 +/- 0.005 0.034 +/- 0.005 0.041 +/- 0.005 7/21/2021 0.025 +/- 0.003 0.032 +/- 0.004 0.026 +/- 0.004 0.029 +/- 0.004 0.027 +/- 0.004 7/28/2021 0.041 +/- 0.005 0.047 +/- 0.006 0.037 +/- 0.005 0.041 +/- 0.005 0.044 +/- 0.005 8/4/2021 0.059 +/- 0.006 0.061 +/- 0.006 0.057 +/- 0.006 0.061 +/- 0.006 0.057 +/- 0.006 8/11/2021 0.054 +/- 0.006 0.042 +/- 0.005 0.042 +/- 0.005 0.038 +/- 0.005 0.050 +/- 0.007 8/18/2021 0.050 +/- 0.005
0.052 +/- 0.006 0.047 +/- 0.005 0.041 +/- 0.005 0.049 +/- 0.005 8/25/2021 0.038 +/- 0.005 0.043 +/- 0.005 0.043 +/- 0.005 0.041 +/- 0.005 0.052 +/- 0.006 9/1/2021 0.048 +/- 0.006 0.045 +/- 0.005 0.054 +/- 0.006 0.047 +/- 0.005 0.053 +/- 0.006 9/8/2021 0.036 +/- 0.005 0.038 +/- 0.005 0.044 +/- 0.005 0.044 +/- 0.005 0.045 +/- 0.005 9/15/2021 0.041 +/- 0.005 0.045 +/- 0.005 0.041 +/- 0.005 0.044 +/- 0.005 0.040 +/- 0.005 arcadis.com 50
2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Sample Date Air Station M-1 Air Station M-2 Air Station M-3 Air Station M-4 Air Station M-5 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 9/22/2021 0.048 +/- 0.006 0.039 +/- 0.005 0.042 +/- 0.005 0.038 +/- 0.005 0.044 +/- 0.005 9/28/2021 0.049 +/- 0.005 0.041 +/- 0.005 0.045 +/- 0.005 0.042 +/- 0.005 0.052 +/- 0.006 10/6/2021 0.049 +/- 0.006 0.054 +/- 0.006 0.047 +/- 0.006 0.054 +/- 0.006 0.051 +/- 0.006 10/12/2021 0.035 +/- 0.004 0.038 +/- 0.004 0.033 +/- 0.004 0.041 +/- 0.005 0.038 +/- 0.004 10/19/2021 0.054 +/- 0.006 0.060 +/- 0.006 0.058 +/- 0.006 0.053 +/- 0.006 0.057 +/- 0.006 10/26/2021 0.082 +/- 0.007 0.074 +/- 0.007 0.068 +/- 0.006 0.071 +/- 0.006 0.072 +/- 0.006 11/3/2021 0.033 +/- 0.005 0.034 +/- 0.005 0.032 +/- 0.004 0.031 +/- 0.005 0.037 +/- 0.005 11/10/2021 0.036 +/- 0.005 0.033 +/- 0.004 0.029 +/- 0.004 0.034 +/- 0.004 0.040 +/- 0.005 11/16/2021 0.064 +/- 0.006 0.061 +/- 0.006 0.056 +/- 0.006 0.061 +/- 0.006 0.064 +/- 0.006 11/23/2021 0.024 +/- 0.004 0.024 +/- 0.004 0.022 +/- 0.004 0.021 +/- 0.004 0.024 +/- 0.004 7/14/2021 0.044 +/- 0.005 0.046 +/- 0.005 0.042 +/- 0.005 0.051 +/- 0.006 0.046 +/- 0.005 11/30/2021 0.051 +/- 0.005 0.053 +/- 0.006 0.050 +/- 0.005 0.054 +/- 0.006 0.051 +/- 0.005 12/8/2021 0.036 +/- 0.004 0.034 +/- 0.004 0.031 +/- 0.004 0.040 +/- 0.005 0.039 +/- 0.005 12/15/2021 0.068 +/- 0.006 0.058 +/- 0.006 0.055 +/- 0.005 0.064 +/- 0.006 0.068 +/- 0.006 12/21/2021 0.063 +/- 0.006 0.061 +/- 0.006 0.055 +/- 0.006 0.063 +/- 0.007 0.070 +/- 0.007 12/28/2021 0.104 +/- 0.008 0.094 +/- 0.008 0.093 +/- 0.008 0.105 +/- 0.008 0.102 +/- 0.008
Partial sample for Air Station M-1 during week of August 18 through 25, 2021.
AIRBORNE PARTICULATES: GAMMA ISOTOPIC Air Station M-1 Qtr 1 Qtr 2 Qtr 3* Qtr 4 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3) 1.36E-03 +/- 2.33E-03 2.26E-04 +/- 2.09E-03 6.39E-04 +/- 4.20E-03 1.58E-03 +/- 2.82E-03 Barium-140 U U U U 6.78E-02 +/- 8.23E-03 8.87E-02 +/- 8.19E-03 9.04E-02 +/- 1.02E-02 6.57E-02 +/- 7.92E-03 Beryllium-7
-6.12E-04 +/- 4.07E-04 3.22E-04 +/- 6.47E-04 -2.19E-04 +/- 4.40E-04 -3.38E-04 +/- 5.10E-04 Cerium-141 U U U U 1.26E-04 +/- 9.72E-04 2.57E-04 +/- 9.55E-04 1.16E-03 +/- 9.19E-04 -3.83E-05 +/- 1.40E-03 Cerium-144 U U U U
-1.74E-04 +/- 2.87E-04 1.23E-04 +/- 2.71E-04 2.44E-04 +/- 2.70E-04 1.74E-04 +/- 3.44E-04 Cesium-134 U U U U
-2.06E-04 +/- 2.83E-04 -3.39E-06 +/- 1.93E-04 3.11E-05 +/- 2.43E-04 2.64E-04 +/- 2.85E-04 Cesium-137 U U U U 2.88E-05 +/- 2.31E-04 -3.06E-05 +/- 2.54E-04 -1.39E-04 +/- 3.88E-04 -6.56E-05 +/- 3.00E-04 Cobalt-58 U U U U
-3.84E-05 +/- 2.55E-04 -1.05E-04 +/- 2.70E-04 -1.31E-04 +/- 3.52E-04 -1.63E-04 +/- 3.11E-04 Cobalt-60 U U U U
-3.85E-04 +/- 8.21E-04 3.89E-04 +/- 9.83E-04 -8.02E-04 +/- 2.05E-03 -2.88E-04 +/- 1.12E-03 Lanthanum-140 U U U U 5.75E-05 +/- 2.85E-04 -1.51E-04 +/- 2.64E-04 1.72E-04 +/- 2.95E-04 1.31E-04 +/- 2.77E-04 Manganese-54 U U U U
-8.19E-05 +/- 2.48E-04 1.79E-04 +/- 3.51E-04 -1.26E-04 +/- 3.01E-04 4.36E-04 +/- 3.22E-04 Niobium-95 U U U U
-6.10E-05 +/- 2.82E-04 1.10E-04 +/- 2.57E-04 7.90E-05 +/- 3.50E-04 1.51E-04 +/- 3.46E-04 Ruthenium-103 U U U U
-8.31E-04 +/- 1.87E-03 2.32E-04 +/- 1.96E-03 -2.11E-03 +/- 2.70E-03 -1.46E-03 +/- 3.03E-03 Ruthenium-106 U U U U
-6.79E-05 +/- 6.08E-04 1.25E-04 +/- 5.39E-04 3.75E-04 +/- 6.53E-04 -8.04E-04 +/- 7.24E-04 Zinc-65 U U U U arcadis.com 51
2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MONTICELLO NUCLEAR GENERATING PLANT Air Station M-1 Qtr 1 Qtr 2 Qtr 3* Qtr 4 I t - - - - 1 (pCi/m3) (pCi/m3)

+--------+--------+--------+-----------

3.10E-04 +/- 4.36E-04 4.49E-06 +/- 4.60E-04 (pCi/m3)
-7.36E-05 +/- 4.89E-04 (pCi/m3) 7.84E-05 +/- 5.31E-04 Zirconium-95 U U U U
Partial sample for Air Station M-1 during week of August 18 through 25, 2021.
Air Station M-2 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (pCi/m3) (pCi/m3) (pCi/m3) (pCi/m3)
-4.51E-04 +/- 1.96E-03 3.24E-03 +/- 3.84E-03 2.60E-03 +/- 3.78E-03 4.77E-04 +/- 2.32E-03 Barium-140 U UI U U 8.05E-02 +/- 7.39E-03 1.06E-01 +/- 9.21E-03 1.09E-01 +/- 1.01E-02 5.32E-02 +/- 7.26E-03 Beryllium-7 1.21E-04 +/- 3.24E-04 2.11E-04 +/- 3.41E-04 -4.03E-04 +/- 5.34E-04 8.99E-05 +/- 8.93E-04 Cerium-141 U U U U
-8.95E-04 +/- 9.27E-04 -4.87E-04 +/- 9.84E-04 -2.06E-04 +/- 1.13E-03 1.07E-03 +/- 1.75E-03 Cerium-144 U U U U
-1.55E-05 +/- 2.14E-04 -4.20E-05 +/- 2.16E-04 6.58E-05 +/- 2.23E-04 1.61E-04 +/- 3.39E-04 Cesium-134 U U U U 6.81E-05 +/- 2.05E-04 -1.48E-05 +/- 2.96E-04 2.08E-06 +/- 2.56E-04 -5.00E-05 +/- 2.48E-04 Cesium-137 U U U U 1.12E-04 +/- 2.81E-04 -9.37E-05 +/- 3.30E-04 1.55E-05 +/- 3.12E-04 -3.55E-05 +/- 3.13E-04 Cobalt-58 U U U U 4.87E-05 +/- 2.75E-04 2.63E-04 +/- 2.68E-04 1.33E-04 +/- 2.94E-04 -9.56E-05 +/- 3.65E-04 Cobalt-60 U U U U
-9.52E-04 +/- 8.82E-04 3.31E-04 +/- 1.20E-03 -1.27E-03 +/- 1.48E-03 -2.12E-04 +/- 1.15E-03 Lanthanum-140 U U U U
-4.92E-06 +/- 2.63E-04 -5.81E-05 +/- 2.50E-04 1.85E-04 +/- 2.13E-04 2.01E-04 +/- 2.56E-04 Manganese-54 U U U U 1.40E-04 +/- 2.57E-04 2.37E-04 +/- 2.88E-04 -2.12E-05 +/- 3.13E-04 -4.03E-04 +/- 4.35E-04 Niobium-95 U U U U 1.64E-05 +/- 2.46E-04 -1.66E-04 +/- 2.51E-04 2.86E-04 +/- 3.27E-04 -1.89E-05 +/- 2.62E-04 Ruthenium-103 U U U U 6.81E-04 +/- 1.85E-03 -1.45E-03 +/- 2.50E-03 8.70E-04 +/- 1.91E-03 1.99E-04 +/- 2.08E-03 Ruthenium-106 U U U U
-1.50E-04 +/- 6.37E-04 7.36E-04 +/- 6.84E-04 -1.66E-04 +/- 6.75E-04 -2.79E-04 +/- 5.24E-04 Zinc-65 U U U U 1.73E-05 +/- 4.40E-04 -1.16E-04 +/- 5.70E-04 -2.15E-04 +/- 6.19E-04 4.27E-05 +/- 5.10E-04 Zirconium-95 U U U U arcadis.com 52

L-MT-23-019, Submittal of 2022 Annual Radiological Environmental Operating Report

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L-MT-23-019, Submittal of 2022 Annual Radiological Environmental Operating Report

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