Text

2020 Annual Radiological Environmental Operating Report
	ML21091A033
Person / Time
Site:	Diablo Canyon
Issue date:	04/01/2021
From:	Gerfen P; Pacific Gas & Electric Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	DCL-21-022
	Download: ML21091A033 (284)
	v • d • e

Pacific Gas and El'ectric Company*

Paula Gerfen Diablo Canyon Power Plant Site Vice President P.O. Box 56 Nuclear Generation Avila Beach, CA 93424 805.545.4596 E-Mail: Paula.Gerfen@pge.com April 1, 2021 PG&E Letter DCL-21-022 U.S. Nuclear Regulatory Commission 10 CFR 50, Appendix I ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Power Plant, Units 1 and 2 2020 Annual Radiological Environmental Operating Report

Dear Commissioners and Staff:

In accordance with Diablo Canyon Power Plant, Units 1 and 2, Technical Specification 5.6.2, Pacific Gas and Electric Company hereby submits the 2020 Annual Radiological Environmental Operating Report (AREOR). The AREOR, provided in the enclosure, covers the operation of Units 1 and 2 for the period of January 1 through December 31, 2020. This report contains material consistent with the objectives of the Offsite Dose Calculation Manual, and 10 CFR 50, Appendix I, Sections IV.B.2, IV.B.3, and IV.C.

There are no new or revised regulatory commitments in this report (as defined by NEI 99-04).

If you have any questions regarding this submittal, please contact Mr. Craig Sutton, Radiation Protection Manager, at (805) 545-4208.

Sincerely, Paula Gerfen A member of the STARS Alliance Callaway

Diablo Canyon

Palo Verde

Wolf Creek

Document Control Desk PG&E Letter DCL-21-022 April 1, 2021 Page 2 Enclosure armb/4743/50942685-7 cc: Diablo Distribution cc/enc: Dr. Penny E. Borenstein, San Luis Obispo County Health Officer Donald R. Krause, NRC Senior Resident Inspector Samson S. Lee, NRC Project Manager Scott A. Morris, NRC Region IV Administrator Gonzalo L. Perez, Branch Chief, California Department of Public Health John M. Robertson, Executive Officer, Central Coast Regional Water Quality Control Board Gary E. Willey, Air Pollution Control Officer, San Luis Obispo County Air Pollution Control District A member of the STARS Alliance Callaway

Diablo Canyon

Palo Verde

Wolf Creek

Enclosure PG&E Letter DCL-21-022 2020 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT

2020 Annual Radiological Environmental Operating Report Diablo Canyon Power Plant January 1, 2020 - December 31, 2020 1

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2020 Diablo Canyon Power Plant ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT (AREOR)

January 1, 2020 - December 31, 2020 Prepared By Pacific Gas & Electric Company Diablo Canyon Power Plant Prepared: ~rt94 Tom Hook, DCPP RP Engineer Date:

Reviewed and Approved: Date:

Craig Sutton, DCPP Radiation Protection Manager PG&E Submittal Letter DCL-21-022 3

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EXECUTIVE

SUMMARY

This report contains results from the operational Radiological Environmental Monitoring Program (REMP) for Diablo Canyon Power Plant (DCPP) compiled for the period January 1, 2020 through December 31, 2020.

The purpose of the REMP was to assess the levels of radiation or radioactivity in the environment and to verify that DCPP was operating within its design parameters.

Approximately 278 environmental samples, 884 air samples, and 1440 thermo-luminescent dosimeter (TLD) phosphors were collected over the course of the 2020 REMP monitoring period. Approximately 1827 radionuclide analyses were performed on the environmental samples.

The REMP was conducted in accordance with DCPP Program Directive CY2, Radiological Monitoring and Controls Program, and RP1.ID11, Environmental Radiological Monitoring Procedure. This report was submitted per DCPP License Technical Specification 5.6.2.

The types of samples (matrix ID) collected for this monitoring period were as follows:

Air Particulate (AP) Air Cartridge for I-131 monitoring (AC) Air Carbon-14 (AC14)

Direct Radiation (TLD) Milk (MK) Meat (MT) Vegetation (VG)

Drinking Water (DW) Groundwater (GW) Monitor Well (GW) Surface Water (SW)

Aquatic Vegetation (AV) Fish (FH) Mussels (IM) Sediment (SD)

The annual offsite radiological dose received by the general public from plant operations was less than one millirem (mrem) which is insignificant when compared to the 620 millirem average annual radiation exposure to people in the United States from natural and man-made background radiation sources (e.g. cosmic, terrestrial, radon, medical, etc).

The ambient direct radiation levels in the DCPP offsite environs did not change and were within the pre-operational background range. An evaluation of direct radiation measurements indicated all federal EPA 40CFR190 criteria were conservatively met.

Operation of DCPP continued to have no detectable offsite radiological impact. Samples analyzed from the offsite sampling stations continued to show no radiological contribution from plant operations.

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The ambient onsite direct radiation levels within the DCPP plant site boundary near the Independent Spent Fuel Storage Installation (ISFSI) were elevated due to dry cask spent fuel storage. The remaining onsite REMP environmental TLD locations were not affected by the ISFSI due to ISFSI topographical elevation and placement within an onsite hillside which provided shielding to the rest of the site. An evaluation of direct radiation measurements and member-of-public occupancy times within the site boundary indicated all federal criteria for member-of-public dose limits (10CFR20.1301) were conservatively met.

Groundwater isotopic monitoring was conducted in accordance with the Nuclear Energy Institute (NEI) 07-07 Rev 1 Groundwater Protection Initiative (GPI). Concentrations of tritium were detected in two shallow monitoring wells (stations DY1 and OW1) near the power block. This tritium was evaluated and attributed to rain-washout of gaseous tritium exiting the plant vent system via an approved isotopic-effluents discharge path. No groundwater tritium was attributed to DCPP system leaks or spills. It should also be noted that studies of the DCPP site groundwater gradient indicated that any subsurface groundwater flow beneath the DCPP power block was not used as a source of drinking water. Due to topography and site characteristics, this groundwater gradient flow discharged into the Pacific Ocean which is approximately 100 yards from the power block.

An Old Steam Generator Storage Facility (OSGSF) long term storage vault was constructed within the DCPP site boundary in 2007 for storage of eight retired DCPP steam generators and two retired DCPP reactor heads. This OSGSF did not cause any changes to the ambient direct radiation levels within the DCPP environs during 2020. The OSGSF in-building sumps were inspected quarterly by REMP personnel.

The results of the 2020 REMP showed no unusual environmental isotopic findings from DCPP site operations. These results were compared to DCPP preoperational isotopic data and showed no unusual trends.

Diablo Canyon site operations had no significant impact on the health and safety of the public or the environment.

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Southern PG&E property, Station 7C2 Diablo Canyon Power Plant and Morro Bay Rock in distance 7

Humpback whale near DCPP coastline Montana de Oro State Park sand-spit looking north towards Morro Bay 8

TABLE OF CONTENTS Executive Summary Page 5 1.0 Introduction 13 2.0 Program Design 17 2.1 Monitoring Zones 19 2.2 Pathways Monitored 19 2.3 Descriptions of REMP Monitoring 2.3.1 Direct Radiation 19 2.3.2 Airborne Radioactivity 20 2.3.3 Airborne Carbon-14 22 2.3.4 Waterborne 23 2.3.5 Marine Biological, Beach Sand, and Ocean Sediment 24 2.3.6 Food Crops 27 2.3.7 Milk 28 2.3.8 Meat 29 3.0 Radiological Data Summary of Tables 57 4.0 Analysis of Environmental Results 4.1 REMP Sampling Variance / Deviations 75 4.2 Comparison of Achieved LLDs with Requirements 79 4.3 Comparison of Results against NRC Reporting Levels 81 4.4 Data Analysis by Media Type 4.4.1 Direct Radiation 82 4.4.2 Airborne Radioactivity 92 4.4.3 Waterborne 93 4.4.4 Marine Biological, Beach Sand, and Ocean Sediment 94 4.4.5 Food Crops 97 4.4.6 Milk 98 4.4.7 Meat 99 5.0 Groundwater Monitoring 100 6.0 Old Steam Generator Storage Facility 106 7.0 Lab Cross Check Program 107 8.0 DCPP Annual Land Use Census 163 9.0 DCPP Wind Rose 171 10.0 References 177 Appendix A 2020 DCPP REMP Analysis Results 179 Photo credits: Josh Ernstrom, Tom Hook, John Lindsey, Steven Pengilley, Patty and Martin Wright 9

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LIST OF TABLES Table Title Page 2.1 Radiological Environmental Monitoring Program 31 2.2 Distances and Directions to Environmental Monitoring Stations 37 2.3 Detection Capabilities, Environmental Lower Limit of Detection (LLD) 41 2.4 Reporting Levels for Radioactivity in Environmental Samples 43 3.1 Direct Radiation Summary Table 59 3.2 REMP Airborne Summary Table 60 3.3 Surface Water Summary Table 61 3.4 Drinking Water Summary Table 62 3.5 Mussel Summary Table 63 3.6 Fish Summary Table 64 3.7 Algae Summary Table 65 3.8 Kelp Summary Table 66 3.9 Vegetative Crops Summary Table 67 3.10 Milk Summary Table 68 3.11 Meat Summary Table 69 3.12 Ocean Sediment Summary Table 70 3.13 Beach Sand Summary Table 71 3.14 Groundwater Summary Table 72 3.15 Monitoring Well Summary Table 73 8 DCPP Land Use Census 163 LIST OF FIGURES Figure Title 2.1 Diablo Canyon Off-site REMP Locations 45 2.2 Diablo Canyon On-site REMP Locations 49 2.3 Diablo Canyon REMP Stations 53 8 DCPP Land Use Census Map 169 11

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Great Egret wading on DCPP coastline kelp bed

1.0 INTRODUCTION

Natural background radiation is all around us, all the time. Naturally occurring sources of background radiation include cosmic radiation from space, terrestrial radiation from radioactive isotopes in the earth, naturally occurring radioactive isotopes in the food we eat, and naturally occurring isotopes in the air we breathe. The human body (each of us) contains natural radioactive isotopes such as radioactive carbon (C14) and radioactive potassium (K40). As a result, humans have been exposed to radiation since the dawn of man. Over the last 100 years, man has developed new radioactive materials and new machines that create additional sources of background radiation. These additional man-made background sources include radioactive materials used in medical diagnosis, medical treatment, consumer products, industrial processes, security devices, educational tools, research activities, warfare, and worker occupations. The National Council on Radiation Protection and Measurements (NCRP) estimates that the average person in the United States receives about 620 millirem (mrem) of radiation exposure each year from natural and man-made background radiation sources. For comparison, public exposure 13

from nuclear power plant radioactive effluents is less than 1 mrem. This < 1 mrem annual exposure is equivalent to approximately 1 to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of cosmic radiation exposure (0.5 mrem per hour) during a cross country airline flight.

The Radiological Environmental Monitoring Program (REMP) provides data on measurable levels of radiation and radioactive materials in the site environs. This program also evaluates the relationship between quantities of radioactive materials released from the plant and resultant doses to individuals from principal pathways of exposure. In this capacity, REMP provides a check on the effluent release program and dispersion modeling to ensure that concentrations in the environment radioactive effluents conform to the As Low As Reasonably Achievable (ALARA) design objectives of 10 CFR 50, Appendix I.

Monitored Potential Exposure Pathways The Annual Radiological Environmental Operating Report (AREOR) provides summaries of the environmental data from exposure pathways, interpretations of the data, and analyses of trend results. Routinely monitored pathways include ingestion, inhalation, and direct radiation. Routes of exposure are based on site specific information such as receptor locations, receptor ages, distance and direction to release locations, and water usage around the plant. The site specific REMP program has been developed and maintained in accordance with NUREG-1301.

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Diablo Canyon Power Plant (DCPP) consists of two Westinghouse pressurized water reactors (PWR) each producing approximately 1,100 megawatts electrical (MWe). Unit 1 began commercial operation on May 7, 1985 and Unit 2 began commercial operation on March 13, 1986.

Operation of DCPP continues to have no detectable radiological impact offsite. Samples analyzed from the offsite sampling stations continue to show no radiological contribution from plant operations.

This AREOR summarized the findings of the DCPP REMP and was organized as follows:

Section 2: Provided a description of the overall REMP design. Included was a summary of the requirements for REMP sampling, tables listing station routine sampling parameters, TLD monitoring locations, station directions and distances from the plant, and maps of station locations. Tables listing Lower Limit of Detection (LLD) requirements and NRC Reporting Levels were also included.

Section 3: Consisted of the summarized data as required by the Radiological Environmental Monitoring Program. The summaries were provided as specified by the NRC Branch Technical Position on Environmental Monitoring.

Section 4: Provided an interpretation and analysis of environmental sampling results along with deviations. Also included was environmental TLD data trending.

Section 5: Provided a summary of groundwater monitoring in accordance with the NEI 07-07 (Rev 1) Groundwater Protection Initiative.

Section 6: Provided a summary of OSGSF monitoring.

Section 7: Provided an overview of the lab interlaboratory cross-check program.

Section 8: Provided an overview of the current Land Use Census.

Section 9: Provided the one-year and five-year site wind-rose charts.

Section 10: Provided AREOR references.

Appendix A: Provided individual analytical sample results.

This report and previous DCPP AREOR's can be found on the NRC website at:

www.nrc.gov > Nuclear Reactors > Operating Reactors > Reactor Safety Information Topics >

Radioactive Effluent and Environmental Reports > Diablo Canyon 1 & 2 > Environmental Reports 15

DCPP REMP sent replicate split samples of stations 7G1 vegetation (quarterly), 5F2 milk (monthly), 5S2 drinking water (monthly), DW1 drinking water (monthly), OUT seawater (monthly), DCM kelp (quarterly), DCM perch (quarterly), DCM rockfish (quarterly), and DCM ocean sediment (annually) to the California Department of Public Health - Radiologic Health Branch (CDPH-RHB) Laboratory as part of a California State split sampling program. These split samples were independently analyzed by the CDPH-RHB.

Other pathways independently monitored by the CDPH-RHB were quarterly direct radiation environmental TLD stations (MT1, 1A1, 1C1, 4D1, 5F3, 5S1, 7D1, 7C1, 7F1, and 8S2) and weekly air sampling particulate and I-131 (at stations 5F3 and 7D1).

The public can request access to these CDPH-RHB split sampling data results by emailing the CDPH at environmental.radiation@cdph.ca.gov.

South Ranch tide pool 16

DCPP coastline intertidal sea life 2.0 PROGRAM DESIGN The Radiological Environmental Monitoring Program (REMP) for the Diablo Canyon Power Plant (DCPP) was designed with the following specific objectives in mind. These objectives continue to be in force, to varying degrees, throughout facility operation:

To provide an early indication of the appearance or accumulation of any radioactive material in the environment caused by facility operation.

Preoperational data was also used in this comparison.

To provide assurance to regulatory agencies and the public that the station's environmental impact was known and within anticipated limits.

To provide standby monitoring capability for rapid assessment of risk to the general public in the event of unanticipated or accidental releases of radioactive material from DCPP.

The environmental media selected were based on the critical dose pathways of the radionuclides from the environment to man. They included the following: direct radiation, air, water, fish, ocean sediment, and invertebrates. Supplemental samples such as algae, kelp, local agricultural crops, recreational beach sand, groundwater, meat, and milk were also collected. The sampling 17

locations were determined by land use, site meteorology, and local demographics. Guidance for this monitoring program was provided by the Radiological Assessment Branch Technical Position on Radiological Environmental Monitoring, Revision 1, November 1979 (NUREG-1301).

REMP samples were collected by DCPP REMP personnel and sent to General Engineering Labs (GEL) in Charleston, South Carolina for isotopic analysis.

Fish (except market fish) and ocean sediment samples were collected by contract divers of Tenera Environmental and given to DCPP REMP personnel for shipment to GEL.

Market fish samples were collected by local commercial fishermen and then purchased by DCPP REMP personnel in one of two local fish markets for shipment to GEL.

Environmental direct radiation analyses were conducted using thermo-luminescent dosimeters (TLD). Environmental TLD analysis was conducted by Mirion Technologies in Irvine California.

The detailed sampling requirements of the REMP were given in Table 2.1 of this report.

Data summary tables of REMP sampling for the period were shown in section 3 of this report.

Any deviations from the REMP sampling schedule or requirements were documented in section 4 of this report.

Direct dose (environmental TLD) results were shown in section 4 of this report.

Individual REMP sample isotopic analysis results were shown in Appendix A of this report.

Isotopic analysis results were classified as "detected" if the a-posteriori analysis result was greater than the Minimum Detectable Concentration (MDC) value for that specific analysis.

Detected concentrations (> MDC) of nuclear power plant related isotopes have been highlighted with yellow-fill cell background in Appendix A for quick identification by the AREOR audience.

Naturally occurring radioactive materials (NORM) were not highlighted (e.g. gross beta, Be-7, K-40, thorium, radium, radon, lead, etc).

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2.1 MONITORING ZONES The REMP was designed to allow comparison of levels of radioactivity in samples from the areas possibly influenced by DCPP to levels found in areas not influenced by the facility operations. Areas with the potential to be influenced by facility operations were called "indicator" stations. Areas with sufficient distance from the plant that were not likely to be influenced by facility operations were called "control" stations. The distinction between the two zones was based on distance and relative direction from the site. Analysis of survey data from the two zones aided in determination of site environmental influence. Analysis from the two zones assisted in differentiation between radioactive releases and seasonal variations in the natural environmental background radioactivity.

2.2 PATHWAYS MONITORED Direct Radiation Airborne Radioactivity Waterborne Pathways Marine Biological, Beach Sand, and Ocean Sediment Food Crops Milk Meat

2.3 DESCRIPTION

S OF REMP MONITORING 2.3.1 Direct Radiation Environmental TLD badge packets were distributed and collected from field stations by DCPP REMP personnel and then shipped to Mirion Technologies for processing on a quarterly basis. Control badges accompanied the field badges during shipment and deployment to measure any non-station dose received during transit time periods.

Direct ambient radiation was measured at 32 stations near DCPP and at 8 stations near the DCPP ISFSI using Panasonic UD814 TLD type badges.

The TLD badges had valid element correction factors (ECF), were 19

calibrated using a NIST-traceable cesium-137 source, were annealed prior to placement, and were sealed in watertight packaging. Three TLD badges were placed at each station and each badge contained 3 calcium sulfate phosphors for a total of 9 calcium sulfate phosphors at each station.

The 9 phosphors were analyzed and then averaged to provide a single quarterly station reading. Transit process exposure was subtracted, and that single reading was converted into a microrem per hour (µrem/hour) dose rate dependent on the in-field exposure time period. Then the

µrem/hour dose rate was converted into millirem (mrem) per standard (91 day) quarter. This millirem result was reported as "Standard Quarter TLD Results" for each station in the Section 4.4.1 Env TLD Analysis spreadsheets.

DCPP Environmental TLD "Standard Quarter TLD Results" were measurements of all environmental gamma radiation sources (cosmic, terrestrial, radon, man-made, etc) at each station during the in-field deployment period. These all-inclusive exposure values were used to create the trend graphs in Section 4.4.1.

ANSI/HPS N13.37-2014 methodology was used to report "Quarterly /

Annual Investigation Level Dose" to quantify DCPP facility related exposure.

2.3.2 Airborne Radioactivity Air particulate and radioiodine sampling were performed weekly at six indicator stations: MT1, 0S2, 1S1, 7D1, 8S1 and 8S2. Air particulate and radioiodine sampling were performed weekly at one control station: 5F1.

Constant-flow air samplers (F&J model DF-1) were used to draw air through paper filters to collect air particulates (station matrix AP = Air Particulate) and through triethylenediamine (TEDA) impregnated charcoal cartridges to collect radioiodine (station matrix AC = Air Cartridge). The air sampling flow rate was conducted at approximately 2.55 cubic meters per hour. The air sampling collection filters were located approximately 20

seven feet above the ground. The sample volumes were determined by F&J Corporation model DF-1 flow meters (corrected to standard temperature and pressure, STP) which were installed downstream of the sample filters. At the end of the weekly sampling period, the particulate filter and TEDA charcoal cartridge were collected. All necessary data regarding the air volume readings, flow rate, sampler time on / off, date of collection, and sampler station location were recorded and submitted to GEL along with the filter samples for isotopic analysis.

Approximately 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after sampling (to allow for radon and thoron daughter decay), the particulate filter papers collected from the field were placed on individual planchets and counted for gross beta activity in a low background, thin window gas proportional counter.

Quarterly gamma spectroscopy isotopic analysis was performed on station composites of the approximate 13 filters to determine the activity concentration of gamma emitting isotopes. The quarterly composite sample time is reported at the midpoint of the quarter monitored.

Due to the short half-life of Iodine-131, each station weekly TEDA impregnated charcoal cartridge was counted for gamma spectroscopy isotopic analysis to determine the radioiodine concentration.

DCPP air sampling station equipment 21

2.3.3 Airborne Carbon-14 Supplemental air Carbon-14 (station matrix AC14) sampling was performed weekly at stations 0S2 (northwest sector), 8S1 (southeast sector), and 5F1 (control station in San Luis Obispo) throughout 2020.

GEL and DCPP REMP worked together to develop a method for sampling environmental airborne inorganic C-14. Inorganic C-14 (as CO2) is the primary exposure pathway to man via photosynthesis in plants. A constant flow air sampler was used to draw air through a solid phase carbon sensitive sorbent cartridge. The air sampler was set at a flow rate of 1 standard liter-per-minute. The air sample filter cartridge head was located approximately seven feet above the ground. At the end of the weekly sampling period, the filter cartridge was collected. All necessary data regarding the air volume, flow rate, sampler time on / off, date of collection, and sampler station location were recorded and submitted to GEL along with the sample filter for C-14 analysis. At GEL, a suitable portion of the solid sorbent material was processed through a method utilizing wet oxidation to remove volatile CO2 from the media in a closed distillation system. Once removed from the media, C-14 as carbon dioxide was sparged through a dilute acid solution for trapping any tritium water present in the sample. After sparging through dilute acid, the CO2 was trapped in a sorbent solution which was added to liquid scintillation cocktail and finally counted in a liquid scintillation counter. It should be noted that C-14 results in Appendix A are reported in microcuries (µCi) per cubic meter. This method met the following specifications:

Validated to retain 99.9% of inorganic C-14 in air

Validated at collection rates of approximately 1 liter-per-minute

Validated for a one-week total collection capacity

Accurate analysis of C-14 over a wide range of concentrations

Methodology free from interference by other radionuclides

Detection capability of approximately 8E-7 µCi per cubic meter 22

2.3.4 Waterborne Water samples (drinking water, surface water, monitor wells, and groundwater) were collected at the frequencies shown in Table 2.1.

Ocean surface water samples were collected at Diablo Cove (station DCM), Rattlesnake Canyon (station 7C2), and at the plant Outfall (station OUT).

Drinking water samples were collected from Diablo Creek Weir (station 5S2), Diablo Creek Outlet (station WN2), Blanchard Spring (station 1A2),

and from the DCPP drinking water system (station DW1). San Luis Obispo (SLO) city drinking water was also collected from a control station located at 4325 South Higuera Street, Offsite Emergency Lab (station OEL) in SLO.

Supplemental groundwater samples were collected from Water Well 02 (WW2) and DCSF96-1 (8S3).

Supplemental onsite monitoring well samples were collected from french-drain systems labeled Observation Well 01 (OW1) and Observation Well 02 (OW2). These shallow French drain well systems were in close proximity to the facility power block structures and within the protected area.

Two onsite monitoring wells were installed in December 2011 as part of the industry Groundwater Protection Initiative (GPI). Isotopic sampling of these wells was initiated in 2012. These two onsite wells were downgradient of the power block and located along the west side of the power block. These two monitoring wells were labeled Groundwater 1 (GW1) and Groundwater 2 (GW2).

After collection, the samples were securely sealed and labeled with sample type, station ID, date, time of collection, person performing the collection and sent to GEL for analysis.

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REMP personnel conducting sea water sampling 2.3.5 Marine Biological, Beach Sand, and Ocean Sediment The REMP required sampling of rockfish (genus Sebastes), perch (family Embiotocidae), intertidal mussels (genus Mytilus), and ocean sediment from indicator station DCM and control station 7C2.

All other marine samples collected were considered supplemental. These supplemental marine samples included the following: intertidal algae, intertidal mussels, kelp, rockfish, perch, beach sand, and market fish. The intertidal samples were collected by DCPP personnel during low tidal conditions. Kelp was collected quarterly by DCPP personnel from the offshore kelp bed near the site.

Beach sand was collected by DCPP personnel between the high tide and low tide boundaries at nearby recreational beaches.

In-shell mussels were sent to GEL where GEL personnel removed the meat & internal organs for analysis.

Quarterly samples of fish and annual samples of ocean sediments were collected from the site environs by contracted divers (TENERA Environmental). The Tenera divers fillet the fish and leave a small portion of skin for identification. Only edible portions (fish fillets) of the fish were analyzed.

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Market Fish caught locally by commercial fishermen were purchased from two local fish markets (Avila Beach Pier-7D3 and Morro Bay-2F1).

All samples were subject to unavailability due to seasonal fluctuations or unfavorable sampling conditions.

The above samples were immediately sealed in plastic containers upon collection. The samples were labeled with sample type, station ID, date, time of collection, and the individual who performed collection. Most samples were routinely frozen (to prevent spoilage odor) before they were shipped to GEL for analysis.

REMP mussel sampling 25

26 2.3.6 Food Crops The REMP required broadleaf food vegetation collected at the nearest off-site locations of the highest calculated annual average ground level D/Q (deposition coefficient) within 5 miles. There was no broadleaf food vegetation available that satisfied this requirement. Because these food products were unavailable, the DCPP REMP conducted additional weekly air sampling in the SE (station 8S2) and NNW (station 1S1) sectors.

Additional representative samples of food crops (in season) were collected monthly from supplemental stations: Cal Poly Farm (5F2), Kawaoka Farm in Arroyo Grande (7G1), Mello Farm (7C1) along the DCPP site access road, and quarterly from local gardens (3C1, 6C1, and 7E1).

The vegetation samples at 5F2, 7G1, 7C1, 3C1, and 7E1 were collected by DCPP personnel and immediately sealed in plastic bags. The quarterly garden vegetation sample at 6C1 was provided by the land occupant (due to difficulty of property access and occupant requested privacy) to DCPP personnel.

The samples were labeled with sample type, station ID, collection date, collection time, and the individual who performed collection. The samples were routinely frozen (to prevent spoilage odor) before they were shipped to GEL for analysis.

Vegetation sampling at Cal Poly Station 5F2 27

2.3.7 Milk There were no animals within the 5-mile vicinity of the site utilized for milk consumption by humans. However, supplemental samples of cow milk were collected monthly from the Cal Poly Farm (5F2) which was approximately 13 miles from DCPP.

Three 1-gallon plastic containers of milk were collected each sampling period by DCPP personnel. Forty grams of sodium bisulfite preservative were added to each gallon of milk sample. The containers were sealed and shaken thoroughly to distribute the preservative. The containers were labeled with sample type, station ID, collection date, collection time, and the individual who performed collection. The samples were then express-shipped (due to the short half-life of I-131) to GEL for analysis.

Milk sampling at Cal Poly Station 5F2 28

2.3.8 Meat A rancher routinely grazed (free range, grass fed) cattle within three miles of the site boundary between the northwest clockwise to east sectors. This livestock meat would then be offered at local farmers markets and private distribution. Because it was possible for this vendor to provide an individual's sole-source of annual meat consumption, this meat sampling was included in the REMP. REMP personnel obtained commercially packaged meat samples directly from the vendor. Gamma spec and total strontium 89/90 analyses were performed on the meat. The REMP station codes were BCM, BGM, and BSM.

Control station free range, grass fed meat sampling was conducted of ranches outside the influence of DCPP. This meat was purchased by REMP personnel from the Whole Foods Market in SLO. The control station meat consisted of Hearst Ranch ground beef which is located approximately 37 miles north of the DCPP site. The REMP station code was CCM (Control Cow Meat).

The meat was packaged by the livestock owners or commercial processes.

The unopened packages were then separated by species and placed into large over-pack zip-lock bags. Each bag was labeled with sample type, station ID, collection date, collection time, and the individual who performed the collection. The samples were then frozen and shipped to GEL for isotopic analysis.

Cattle on southern DCPP property near 7C2 29

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TABLE 2.1:

Radiological Environmental Monitoring Program Exposure Pathway Number of Representative Sampling Collection Frequency Type of Required or and/or Sample Type Samples and Sample Stations Analysis Supplemental Locations1

1. Direct Radiation2 Thirty-two routine monitoring stations containing thermo luminescent dosimeters (TLDs) such that at least two (2) phosphors are present at each station, placed as follows:

An inner ring of stations, one in 0S1, 0S2, Quarterly Gamma Dose Required each terrestrial meteorological WN1, 1S1, sector in the general area of the 2S1, 3S1, 4S1, SITE BOUNDARY; 5S1, 6S1, 7S1, 8S1, 9S1, 8S2, 5S3, and MT1 An outer ring of stations, one in 0B1, 1A1, 1C1, Quarterly Gamma Dose Required each terrestrial meteorological 2D1, 3D1, 4C1, sector in the 2.5 to 14 km range 5C1, 6D1, and from the site; and 7C1 One or two areas to serve as 2F2, 4D1, 5F1 Quarterly Gamma Dose Required control stations; and The balance of the stations to 5F3, 7D1, 7D2, Quarterly Gamma Dose Required be placed in special interest 7F1, and 7G2 areas such as population centers, nearby residences, or schools.

A minimum of four stations IS1, IS2, IS3, Quarterly Gamma Dose Required around the ISFSI IS4, IS5, IS6, IS7, IS8

2. Airborne Samples from > 4 stations:

Radioiodine Three samples from close to the 0S2, 8S1, Continuous sampler I-131 analysis Required three SITE BOUNDARY and MT1 operation with sample locations ( 0S2, 8S1, & MT1 ) in collection weekly, or different sectors. more frequently if required by dust loading.

One sample from the vicinity of 7D1 Continuous sampler I-131 analysis Required a community having the highest operation with sample calculated annual average collection weekly, or ground level D/Q. more frequently if required by dust loading.

If food products are unavailable, 1S1 & 8S2 Continuous sampler I-131 analysis Required additional air sampling will be operation with sample done in the NNW (station 1S1) collection weekly, or and SE (Station 8S2) sectors. more frequently if required by dust loading.

One sample from a control 5F1 Continuous sampler I-131 analysis Required location. operation with sample collection weekly, or more frequently if required by dust loading.

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Table 2.1 (continued)

Exposure Pathway Number of Representative Sampling Collection Type of Analysis Required or and/or Sample Type Samples and Sample Stations Frequency Supplemental Locations1

3. Airborne Samples from > 4 stations:

Particulate Three samples from close to the 0S2, 8S1, Continuous Weekly gross beta Required three SITE BOUNDARY and MT1 sampler operation radioactivity locations (0S2, 8S1, & MT1) in with sample analysis following different sectors. collection weekly, filter change3.

or more frequently Quarterly gamma if required by dust isotopic analysis4 loading. of composite consisting of approx. 12 filters (by location).

One sample from the vicinity of 7D1 Continuous Weekly gross beta Required a community having the highest sampler operation radioactivity calculated annual average with sample analysis following ground level D/Q. collection weekly, filter change3.

or more frequently Quarterly gamma if required by dust isotopic analysis4 loading. of composite consisting of approx. 12 filters (by location).

If food products are unavailable, 1S1 & 8S2 Continuous Weekly gross beta Required additional air sampling will be sampler operation radioactivity done in the NNW (station 1S1) with sample analysis following and SE (Station 8S2) sectors. collection weekly, filter change3.

or more frequently Quarterly gamma if required by dust isotopic analysis4 loading. of composite consisting of approx. 12 filters (by location).

One sample from a control 5F1 Continuous Weekly gross beta Required location. sampler operation radioactivity with sample analysis following collection weekly, filter change3.

or more frequently Quarterly gamma if required by dust isotopic analysis4 loading. of composite consisting of approx. 12 filters (by location).

4. Airborne Carbon-14 Samples from 3 stations: 0S2,8S1 Continuous C-14 analysis Supplemental One sample from each of the 5F1 (control) sampler operation NW and SE sectors close to the with sample site (0S2 and 8S1). collection weekly, or more frequently One sample used as a control if required by dust station (5F1). loading.

32

Table 2.1 (continued)

Exposure Pathway Number of Representative Sampling Collection Type of Analysis Required or and/or Sample Type Samples and Sample Stations Frequency Supplemental Locations1

5. Waterborne

a. Surface Ocean One sample from the plant OUT, DCM, Monthly Gamma isotopic4 Required Water Outfall, Diablo Cove, and an and 7C2 (grab sample) and tritium area not influenced by plant analysis.

discharge.

One sample from the plant OUT, DCM, Quarterly Gross Beta, Supplemental Outfall, Diablo Cove, and an and 7C2 (grab sample) Total Sr 89/90, area not influenced by plant Fe-55, and Ni-63 discharge.

b. Drinking Water One sample from the plant DW1 and 5S2 Monthly Gamma isotopic4, Required drinking water, one sample from OEL (control) (grab sample) I-131, and tritium Diablo Creek (upstream of analysis.

plant), and one control sample.

One sample from the plant DW1 and 5S2 Quarterly Gross Beta, Supplemental drinking water, one sample from OEL (control) (grab sample) Total Sr 89/90, Diablo Creek (upstream of Fe-55, and Ni-63 plant), and one control sample.

One sample from Diablo Creek WN2 and 1A2 Quarterly Gamma isotopic4, Supplemental (downstream of plant) and one (grab sample) tritium, I-131, gross sample from Blanchard Spring. beta, Total Sr 89/90, Fe-55, and Ni-63

c. Groundwater One sample from wells located OW1, OW2, Quarterly Gamma isotopic4, Supplemental under or downgradient from the GW1 and GW2 (grab sample, tritium, gross beta, plant power block. when available) Total Sr 89/90, Fe-55, and Ni-63 One sample from a well located WW2, 8S3 Quarterly Gamma isotopic4, Supplemental outside the plant power block (grab sample, tritium, gross beta, (control sample). when available) Total Sr 89/90, Fe-55, and Ni-63

d. Sediment One sample of offshore ocean DCM and 7C2 Annual Gamma isotopic4 Required sediment from Diablo Cove and (grab sample)

Rattlesnake Canyon.

One sample of offshore ocean DCM and 7C2 Annual Total Sr 89/90, Supplemental sediment from Diablo Cove and (grab sample) Fe-55, and Ni-63 Rattlesnake Canyon.

One sample from each of five AVA, MDO, Semi- Annual Gamma isotopic4, Supplemental local recreational beaches. PMO, CYA, (grab sample) Total Sr 89/90, and CBA Fe-55, and Ni-63

e. Marine Flora One sample of kelp DCM, PON, Quarterly Gamma isotopic4 Supplemental POS, and 7C2 (when available)

One sample of intertidal algae DCM and 7C2 Quarterly Gamma isotopic4 Supplemental (when available) 33

Table 2.1 (continued)

Exposure Pathway Number of Representative Sampling Collection Type of Required or and/or Sample Type Samples and Sample Stations Frequency Analysis Supplemental Locations1

6. Ingestion

a. Milk Samples from milking animals in 5F2 Semimonthly Gamma isotopic4 Supplemental three locations within 5 km when animals are and I-131 distance having the highest on pasture; analysis.

dose potential. If there are none, monthly at other then one sample from milking times.

animals in each of three areas between 5 to 8 km distance where doses are calculated to be greater than 1 mrem per year. One sample from milking animals at a control location 15 to 30 km distant and in the least prevalent wind direction.

NOTE: The sample (5F2) should be taken monthly even if there are no indicator samples available.

b. Fish and One sample of rock fish (family DCM and 7C2 Quarterly Gamma isotopic4 Required Invertebrates Sebastes) and one sample of (grab sample) analysis on perch (family Embiotocidae) edible portions of each sample.

One sample of rock fish PON and POS Quarterly Gamma isotopic4 Supplemental (family Sebastes) and (grab sample) analysis on one sample of perch edible portions (family Embiotocidae) of each sample.

One sample of mussel DCM and 7C2 Quarterly Gamma isotopic4 Required (family Mytilus) (grab sample) analysis on edible portions of each sample.

One sample of mussel PON Annual Gamma isotopic4 Supplemental (family Mytilus) (grab sample) analysis on edible portions of each sample.

One sample of mussel POS Quarterly Gamma isotopic4 Supplemental (family Mytilus) (grab sample) analysis on edible portions of each sample.

One sample of locally harvested 7D3 OR 2F1 Quarterly Gamma isotopic4 Supplemental market fish. (should (grab sample) analysis on alternate edible portions between of each sample.

locations) 34

Table 2.1 (continued)

Exposure Pathway Number of Representative Sampling Collection Type of Required or and/or Sample Type Samples and Sample Stations Frequency Analysis Supplemental Locations1

c. Broadleaf Three samples of broadleaf Monthly Gamma isotopic4 Required Vegetation5 vegetation grown nearest (when available) analysis (that (see notation #5) off-site locations of highest includes I-131) calculated annual average on edible ground level D/Q IF milk portion.

sampling is not performed.

One sample of each of the Monthly Gamma isotopic4 Required similar broadleaf vegetation (when available) analysis (that (see notation #5) grown 15 to 30 km distant in the includes I-131) least prevalent wind direction IF on edible milk sampling is not performed. portion.

d. Vegetative One sample of broadleaf 5F2, 7C1, Monthly Gamma isotopic4 Supplemental Crops vegetation or vegetables or fruit and 7G1 (when available) analysis on edible portion.

One sample of broadleaf 3C1, 6C1, 7E1 Quarterly Gamma isotopic4 Supplemental vegetation or vegetables or fruit. (as provided by analysis on land owner) edible portion.

e. Meat sample One sample of each species BCM, BGM, Quarterly Gamma isotopic4 Supplemental (cow, goat, sheep, deer, or pig) BSM, JDM, (as available and analysis, and of edible meat portion JPM, ACM, provided by land Total Sr 89/90 slaughtered for personal ADM, APM, owners within 8 on edible consumption (not mass market). CCM km of plant site) portion.

Table Notations

1. Deviations are permitted from the required sampling schedule if specimens are unobtainable due to circumstances such as hazardous conditions, seasonal unavailability, malfunction of automatic sampling equipment and other legitimate reasons.

If specimens are unobtainable due to sampling equipment malfunction, effort shall be made to complete corrective action prior to the end of the next sampling period. All deviations from the sampling schedule shall be documented in the Annual Radiological Environmental Operating Report. It is recognized that, at times, it may not be possible or practicable to continue to obtain samples of the media of choice at the most desired location or time. In these instances, suitable specific alternative media and locations may be chosen for the particular pathway in question and appropriate substitutions made within 30 days in the Radiological Environmental Monitoring Program, and submitted in the next Annual Radioactive Effluent Release Report, including a revised figure(s) and table for the ERMP reflecting the new location(s) with supporting information identifying the cause of the unavailability of samples for that pathway and justifying the section of the new location(s) for obtaining samples.

2. For the purposes of this table, a thermoluminescent dosimeter (TLD) is considered to be one phosphor. There are normally three calcium sulfate phosphors in an environmental TLD BADGE. Film badges shall not be used as dosimeters for measuring direct radiation.

3. Airborne particulate sample filters shall be analyzed for gross beta radioactivity 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or more after sampling to allow for radon and thoron daughter decay. If gross beta activity in air particulate samples is greater than 10 times the yearly mean of control samples, gamma isotopic analysis shall be performed on the individual samples.

4. Gamma isotopic analysis means the identification and quantification of gamma-emitting radionuclides that may be attributable to the effluents from the facility.

5. If broadleaf vegetation food products are unavailable, additional air sampling as specified in Table 2.1, Parts 2 & 3 will be done in the NNW (station 1S1) and SE (Station 8S2) sectors.

6. The Branch Technical Position (Nov 79) states, "Any location from which milk can no longer be obtained may be dropped from the surveillance program after notifying the NRC in writing that they are no longer obtainable at that location".

Although milk sampling performed at 5F2 is outside the 5-mile radius and is supplemental to the REMP, this notification should take place if 5F2 milk sampling ceases.

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36

TABLE 2.2 Distances and Directions to Environmental Monitoring Stations Radial Direction** Radial Distance**

Station (True Heading) From Plant Code(a) Station Name Degrees km Miles 0S1 Exclusion Fence-Northwest Corner 320 0.16 0.1 0S2 North Gate 320 0.8 0.5 1S1 Wastewater Pond 330 0.64 0.4 2S1 Back Road-300 m North of Plant 0 0.32 0.2 3S1 Road NW of 230 kV Switchyard 23 0.64 0.4 4S1 Back Road Between Switchyards 43 0.8 0.5 5S1 500 kV Switchyard 58 0.64 0.4 5S2 Diablo Creek Weir 65 0.96 0.6 5S3 Microwave Tower Road 70 1.02 0.7 6S1 Microwave Tower 94 0.8 0.5 7S1 Overlook Road 112 0.48 0.3 8S1 Target Range 125 0.8 0.5 8S2 Southwest Site Boundary 128 1.76 1.1 8S3 DCSF 96-1 (monitor well) 140 0.64 0.4 9S1 South Cove 167 0.64 0.4 MT1 Meteorological Tower 185 0.32 0.2 DCM Diablo Cove Marine 249 0.44 0.27 WN1 Northwest Guard Shack 290 0.32 0.2 WN2 Diablo Creek Outlet 283 0.25 0.15 1A1 Crowbar Canyon 327 2.56 1.6 1A2 Blanchard Spring 331 2.4 1.5 0B1 Point Buchon 325 5.76 3.6 1C1 Montana de Oro Campground 336 7.52 4.7 3C1 Ranch Vegetation 20 7.16 4.5 4C1 Clark Valley Gravel Pit 45 9.28 5.8 5C1 Junction Prefumo/See Canyon Roads 64 7.52 4.7 6C1 Household Garden 98 7.24 4.5 7C1 Pecho Creek Ruins (Mello Farm) 120 6.56 4.1 7C2 Rattlesnake Canyon 124 7.52 4.7 2D1 Sunnyside School 10 11.04 6.9 3D1 Clark Valley 24 9.92 6.2 4D1 Los Osos Valley Road 36 12.16 7.6 6D1 Junction See/Davis Canyon Roads 89 13.4 8.3 7D1 Avila Gate 118 10.56 6.6 7D2 Avila Beach 110 12.16 7.6 7D3 Avila Pier 120 11.0 6.9 7E1 Avila Valley Barn 103 13.94 8.66 2F1 Morro Bay (Commercial Landing) 0 17.44 10.9 2F2 Morro Bay Power Plant 358 17.9 11.2 5F1 SLO OEL 79 16.41 10.2 5F2 Cal Poly Farm 60 20.16 12.6 5F3 SLO County Health Department 70 20.32 12.7 37

Table 2.2 (continued)

Radial Direction** Radial Distance**

Station (True Heading) From Plant Code(a) Station Name Degrees km Miles 7F1 Shell Beach 110 17.28 10.8 7G1 Arroyo Grande (Kawaoka Farm) 115 26.88 16.8 7G2 Oceano Substation 118 27.68 17.3 AVA Avila Beach (near pier) 109 11.75 7.3 CBA Cambria Moonstone Beach 330 45.86 28.5 CYA Cayucos Beach (near pier) 350 26.87 16.7 DY1 Drywell 115 77 0.041 0.026 DW1 Drinking Water (Plant Potable Water Sys) 161 0.59 0.37 GW1 Groundwater Monitoring Well 1 271 0.15 0.09 GW2 Groundwater Monitoring Well 2 195 0.21 0.13 IS1-IS8 ISFSI 59 0.38 0.23 MDO Montana de Oro (Spooners Cove) 336 7.56 4.7 OW1 Observation Well 01 336 0.07 0.046 OW2 Observation Well 02 157 0.07 0.045 OEL Offsite Emergency Lab 79 16.41 10.2 OUT Plant Outfall 229 0.15 0.01 PMO Pismo Beach (near pier) 113 20.76 12.9 PON Pacific Ocean North of Diablo Cove 287 0.56 0.35 POS Pacific Ocean South of Diablo Cove 176 0.7 0.44 WW2 Water Well 02 70 1.02 0.63 BCM Blanchard (Farm) Cow Meat 320 1.94 1.2 BGM Blanchard (Farm) Goat Meat 320 1.94 1.2 BSM Blanchard (Farm) Sheep Meat 320 1.94 1.2 CCM Control Cow Meat 328 59.5 37 JDM Johe (Property) Deer Meat 21 5.24 3.26

The reference point used is the dome of Unit 1 containment.

Station Code (XYZ):

X - First number (0-9) represents the radial sector in which the station is located:

0 - Northwest 5 - East-northeast 1 - North-northwest 6 - East 2 - North 7 - East-southeast 3 - North-northeast 8 - Southeast 4 - Northeast 9 - South-southeast Y - Letter (S, A-H) represents the distance from the plant:

S - On-site A 2 miles from plant (but off-site)

B 4 miles from plant C 6 miles from plant D 8 miles from plant E 10 miles from plant F 15 miles from plant G 20 miles from plant H - Greater than 20 miles from plant Z - Second number represents the station number within the zone.

38

Table 2.2 (continued)

Station Codes exceptions:

The following stations do not follow the coding system:

Diablo Cove Marine (DCM)

Montana de Oro (MDO)

Meteorological Tower (MT1)

Pismo Beach (PMO)

Northwest guard shack (WN1)

Cayucos Beach (CYA)

Diablo Creek outlet (WN2)

Cambria Moonstone Beach (CBA)

Pacific Ocean North (PON)

Blanchard Cow Meat (BCM)

Pacific Ocean South (POS)

Blanchard Goat Meat (BGM)

Offsite Emergency Lab (OEL)

Blanchard Sheep Meat (BSM)

Plant outfall (OUT)

Control Cow Meat (CCM)

Drinking water (DW1)

Johe Deer Meat (JDM)

Water Well 02 (WW2)

Johe Pig Meat (JPM)

Observation Well 01 (OW1)

Andre Cow Meat (ACM)

Observation Well 02 (OW2)

Andre Deer Meat (ADM)

Drywell 115 (DY1)

Andre Pig Meat (APM)

Avila Beach (AVA)

ISFSI TLDs (IS1 - IS8)

Groundwater Monitoring Well 1 (GW1)

Groundwater Monitoring Well 2 (GW2) 39

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40

TABLE 2.3:

(a)

Detection Capabilities for Environmental Sample Analysis (b)

Lower Limits of Detection (LLD)

Airborne Food Water Particulate or Fish Milk Products Soil/Sediment Analysis (pCi/L) Gases (pCi/m3) (pCi/kg, wet) (pCi/L) (pCi/kg, wet) (pCi/kg, dry)e Gross beta 4 0.01 H-3 400 c 11,000 Mn-54 15 130 150 Fe-59 30 260 300 Co-58 15 130 150 Co-60 15 130 150 Zn-65 30 260 300 Zr-95 30 300 Nb-95 15 150 I-131 1 d 0.07 1 60 Cs-134 15 0.05 130 15 60 150 Cs-137 18 0.06 150 18 80 180 Ba-140 60 60 600 La-140 15 15 150 Table Notations a) The gamma emitters and corresponding LLD values listed are derived from standard ODCM guidance for environmental samples as found in NUREG-1301, Table 4.12-1. This list does not mean that only these nuclides are to be considered. Other peaks that are identifiable, together with those of the above nuclides, are also analyzed and reported in the Annual Radiological Environmental Operating Report.

b) The LLD is defined, for purposes of these specifications, as the a-priori analysis process that will yield a net count, above system background, that will be detected with 95 percent probability with only 5 percent probability of falsely concluding that a blank observation represents a "real" signal for the above concentration of radioactive material in a sample.

c) If no drinking water pathway exists, a value of 3,000 pCi/L may be used for tritium. All groundwater wells should use the 400 pCi/L tritium value regardless of drinking water use.

d) The LLD value of 1 pCi/L for I-131 is applicable only to sources used as drinking water.

If no drinking water pathway exists, a value of 15 pCi/L may be used for I-131.

e) The gamma emitters LLD values listed for soil/sediment are derived from the Cs-134/137 10:1 ratio established in the environmental LLDs in NUREG-1301, Table 4.12-1.

41

TABLE 2.3 (Continued)

Table Notations For a particular measurement system, which may include radiochemical separation:

LLD = 4.66sb E x V x 2.22 x Y x exp(-t)

Where:

LLD = the "a priori" the lower limit of detection as defined above (as pCi per unit mass or volume)

Sb = the standard deviation of the background counting rate or of the counting rate of a blank sample as appropriate (as counts per minute)

E = the counting efficiency (as counts per transformation)

V = the sample size (in units of mass or volume) 2.22 = the number of transformations per minute per pico-curie Y = the fractional radiochemical yield (when applicable)

= the radioactive decay constant for the particular radionuclide t = the elapsed time between sample collection (or end of the sample collection period) and time of counting The value of Sb used in the calculation of the LLD for a detection system will be based on the actual observed variance of the background counting rate or of the counting rate of the blank samples (as appropriate) rather than on an unverified theoretically predicted variance. In calculating the LLD for a radionuclide determined by gamma-ray spectrometry, the background will include the typical contributions of other radionuclides normally present in the samples (e.g., potassium-40 in milk samples).

Analyses will be performed in such a manner that the stated LLDs will be achieved under routine conditions. Occasionally background fluctuations, unavoidably small sample sizes, the presence of interfering nuclides, or other uncontrollable circumstances may render these LLDs unachievable. In such cases, the contributing factors will be identified and described in the Annual Environmental Radiological Operating Report.

Typical values of E, V, Y and t should be used in the calculation. It should be recognized that the LLD is defined as a-priori (before the fact) limit representing the capability of a measurement system and not as a-posteriori (after the fact) limit for a particular measurement.

42

TABLE 2.4: Reporting Levels for Radioactivity Concentrations in Environmental Samples Airborne Water Particulate or Fish Milk Food Products Analysis (pCi/L) Gases (pCi/m3) (pCi/kg, wet) (pCi/L) (pCi/kg, wet)

H-3

20,000 Mn-54 1,000 30,000 Fe-59 400 10,000 Co-58 1,000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-Nb-95 400 I-131 ** 2 0.9 3 100 Cs-134 30 10 1,000 60 1,000 Cs-137 50 20 2,000 70 2,000 Ba-La-140 200 300

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

- If no drinking water pathway exists, a value of 20 pCi/L may be used 43

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44

Figure 2.1- Diablo Canyon Off-site Stations 45

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46

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Figure 2.2- Diablo Canyon On-site Stations 49

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NW NNW N NNE NE ENE dary Boun Site 0S2 1S1 3S1 4S1 Switchyard 5S2 Diablo Creek WNW 2S1 ter 5S1 WN1 Wa oirs OGSF 5S3 w v k Ra ser IS-4 IS-5 r ee Re C

bl o IS-3 PON ia D IS-6 ISFSI 0S1 undary IS-2 W WN2 IS-7 E GW1 IS-1 IS-8 Site Bo DCM 6S1 OUT GW2 MT1 7S1 WSW LEGEND 8S3 Dosimetry Station Air Particulate Station 8S1 N Biological Station DW1 ESE 9S1 POS SW 8S2 DCPP Onsite REMP Stations SSW S SSE SE 51

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52

Figure 2.3- Diablo Canyon Station Locations 53

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54

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____ Sectors I

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56

Pacific Harbor Seal at Diablo Canyon intake cove 3.0 RADIOLOGICAL DATA-

SUMMARY

OF TABLES This section summarized the analytical results of the environmental samples collected during the monitoring period. The results were presented in a format similar to that prescribed in the NRC's Radiological Assessment Branch Technical Position on Environmental Monitoring, Revision 1, November 1979 (NUREG-1301).

Each table was nuclide specific and the total numbers of analyses for that radionuclide were provided. Additionally, the number of measurements which exceeded the NRC Notification Reporting Levels found in Table 2.4 of this report were provided. The first column listed the matrix or pathway sampled during the period. The second column listed the nuclides analyzed and number of samples performed. The third column provided the a-priori Lower Limit of Detection (LLD) for radionuclides that have detection capability requirements as specified in Table 2.3 of this report. The fourth, fifth, and sixth columns contained the mean and range of results for locations. The seventh column contained the number of NRC Reportable occurrences for the location 57

pathway. Occasionally, the required LLD may not be met. An example of this occurrence might be due to hold times between sampling and analysis. Such cases, if any, were addressed in Section 4.2 of this report.

The a-posteriori Minimum Detectable Concentration (MDC) listed for each analysis in Appendix A was used as the detection evaluation point for each sample collected.

Therefore, a sample was considered to yield a "detectable measurement" when the "result" concentration exceeded the associated MDC value for that analysis. The MDC was calculated by the laboratory with each analysis (a-posteriori) and incorporated conditions observed at the laboratory during the analysis. Note that the a-posteriori MDC equation used by the environmental lab was the same as the a-priori Lower Limit of Detection (LLD) equation specified in NUREG-1301.

Additionally, the tables provided the mean of all detectable sample results analyzed for the specified radionuclide/ media type, the range, and the total number of detectable samples of all the samples counted:

The mean value consisted of the average of detectable concentrations

The lowest and highest detected concentration values were listed as the range

The number of detectable measurements and the total number of measurements were listed. For example, (4/20) would indicate that 4 of the 20 samples collected (for that sample type and that radionuclide) contained detectable radioactivity.

The radionuclides reported in this section represented those that:

had an LLD requirement in Table 2.3, or a Reporting Level listed in Table 2.4

were of specific interest for any other reason The radionuclides routinely analyzed and reported (if detected) within a gamma spectroscopy analysis were:

Ac-228, Ag-108m, Ag-110m, Am-241, Ba-140, Be-7, Bi-212, Bi-214, Ce-141, Ce-144, Co-57, Co-58, Co-60, Cr-51, Cs-134, Cs-137, Fe-59, I-131, K-40, La-140, Mn-54, Nb-95, Pb-210, Pb-212, Pb-214, Ra-224, Ra-226, Ru-103, Ru-106, Sb-124, Sb-125, Th-234, Tl-208, Zn-65, and Zr-95.

58

Table 3.1 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Direct Radiation

( mrem/std quarter ) 5S1, 0.4 mi, 58° See Table 2.2 2F2, 4D1, 5F1 Env TLD Badges( C ) ( 384 ) 6 mrem/qtr Not Detected (0 / 12) Not Detected (0 / 348) Not Detected (0 / 36) 0 IS4, 0.3 mi, 65° IS1 - IS8 ISFSI TLDs( D ) ( 96 ) 6 mrem/qtr 79.5 72.0 - 87.2 (12 / 12) 34.4 15.1 - 87.2 (60 / 96) 0 Table Notation:

( A ) Sensitivity of TLD system using ANSI/HPS N13.37-2014 methodology

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed exposure above historical background and the TLD sensitivity.

( C ) 96 Env TLD badges are distributed quarterly at 32 locations (29 indicator stations and 3 control stations). Each quarter there are 3 badges exposed per station.

( D ) 24 ISFSI Env TLD badges distributed quarterly at 8 locations surrounding the ISFSI protected area and within the site boundary. Each quarter 3 badges exposed per station.

59

Table 3.2 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Airborne Iodine (364) 7D1, 6.6 mi, 118 ° 0S2, 1S1, 7D1, 8S1, 8S2, MT1 5F1, 10.2 mi, 79°

( pCi/meter3 ) I-131 0.07 None Detected (0/52) None Detected (0/312) None Detected (0/52) 0 Airborne Air Particulates (364) 7D1, 6.6 mi, 118° 0S2, 1S1, 7D1, 8S1, 8S2, MT1 5F1, 10.2 mi, 79°

( pCi/meter3 ) Gross Beta 0.01 2.02E-2 6.39E-3 to 7.80E-2 (52/52) 1.86E-2 2.49E-3 to 7.99E-2 (312/312) 2.25E-2 4.58E-3 to 8.04-2 (52/52) 0 Gamma Isotopic( C ) ( 28 ) 7D1, 6.6 mi, 118° 0S2, 1S1, 7D1, 8S1, 8S2, MT1 5F1, 10.2 mi, 79° Cs-134 0.05 None Detected (0/4) None Detected (0/24) None Detected (0/4) 0 Cs-137 0.06 None Detected (0/4) None Detected (0/24) None Detected (0/4) 0 Airborne Air Carbon-14 (156) 8S1, 0.5 mi, 125° 0S2, 8S1 5F1, 10.2 mi, 79°

( uCi/meter3 ) Carbon-14 1.00E-06 2.72E-7 2.59E-7 to 2.86E-7 (3/52) 2.56E-7 2.07E-7 to 2.86E-7 (4/104) None Detected (0/52) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

( C ) These gamma isotopic samples are quarterly composite samples of all weekly particulate air sample filters. Approximately 13 particulate filters for each REMP location.

Plant related radionuclides, not naturally occurring isotopes.

60

Table 3.3 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Surface Water DCM, 0.27 mi, 249° DCM, OUT 7C2, 4.7 mi, 124°

( pCi/Liter ) Gamma Isotopic ( 41 )

Mn-54 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Fe-59 30 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Co-58 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Co-60 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Zn-65 30 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Zr-95 30 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Nb-95 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 I-131 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Cs-134 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Cs-137 18 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Ba-140 60 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 La 140 15 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Additional Analysis Gross Beta ( 41 ) 100 329 200-441 (14/14) 324 200-441 (27/27) 314 151-523 (14/14) 0 Fe-55 ( 41 ) 200 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14) 0 Ni-63 ( 41 ) 50 none detected ( 0 / 14) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Tritium H-3 ( 41 ) 400 none detected ( 0 / 14 ) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Total Sr 89/90 ( 41 ) 10 none detected ( 0 / 14) none detected ( 0 / 27 ) none detected ( 0 / 14 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

61

Table 3.4 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Drinking Water 1A2, 1.5 mi, 331° 1A2, 5S2, DW1, WN2 OEL, 10.2 mi, 79°

( pCi/Liter ) Gamma Isotopic ( 48 )

Mn-54 15 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Fe-59 30 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Co-58 15 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Co-60 15 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Zn-65 30 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Zr-95 30 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Nb-95 15 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 I-131 1 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Cs-134 15 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Cs-137 18 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Ba-140 60 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 La 140 15 none detected (0/4) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Additional Analysis Gross Beta ( 48 ) 4 5.79 4.17-7.40 ( 2/4 ) 3.61 1.97-7.40 ( 14/36 ) 1.87 .872-2.56 ( 4/12 ) 0 Fe-55 ( 48 ) 200 none detected ( 0 / 4 ) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Ni-63 ( 48 ) 50 none detected ( 0 / 4 ) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Tritium H-3 ( 48 ) 400 none detected ( 0 / 4 ) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Total Sr 89/90 ( 48 ) 2 none detected ( 0 / 4 ) none detected ( 0 / 36 ) none detected ( 0 / 12 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

62

Table 3.5 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County, State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Mussels

( pCi/kg ) PON, 0.35 mi, 287° DCM, PON, POS 7C2, 4.7 mi, 124° Gamma Isotopic (13)

Mn-54 130 none detected (0/1) none detected (0/9) none detected (0/4) 0 Fe-59 260 none detected (0/1) none detected (0/9) none detected (0/4) 0 Co-58 130 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Co-60 130 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Zn-65 260 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Zr-95 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Nb-95 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 I-131 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Cs-134 130 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Cs-137 150 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Ba-140 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 La-140 none detected (0/1) none detected (0/9 ) none detected (0/4) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

63

Table 3.6 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County, State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Fish

( pCi/kg ) PON, 0.35 mi, 287° 2F1, 7D3, DCM, PON, POS 7C2, 4.7 mi, 124° Gamma Isotopic ( 40 )

Mn-54 130 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Fe-59 260 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Co-58 130 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Co-60 130 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Zn-65 260 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Zr-95 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Nb-95 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 I-131 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Cs-134 130 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Cs-137 150 none detected (0/4) 12.40 8.41 - 14.7 ( 3/32 ) none detected (0/8) 0 Ba-140 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 La-140 none detected (0/4) none detected ( 0 / 32 ) none detected (0/8) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

64

Table 3.7 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County, State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Algae*

( pCi/kg ) DCM, 0.27 miles, 249° DCM, 0.27 miles, 249° 7C2, 4.7 miles, 124° Gamma Isotopic ( 4 )

Mn-54 no algae available to sample no algae available to sample none detected (0/4) 0 Fe-59 no algae available to sample no algae available to sample none detected (0/4) 0 Co-58 80 no algae available to sample no algae available to sample none detected (0/4) 0 Co-60 80 no algae available to sample no algae available to sample none detected (0/4) 0 Zn-65 no algae available to sample no algae available to sample none detected (0/4) 0 Zr-95 no algae available to sample no algae available to sample none detected (0/4) 0 Nb-95 no algae available to sample no algae available to sample none detected (0/4) 0 I-131 no algae available to sample no algae available to sample none detected (0/4) 0 Cs-134 60 no algae available to sample no algae available to sample none detected (0/4) 0 Cs-137 80 no algae available to sample no algae available to sample none detected (0/4) 0 Ba-140 no algae available to sample no algae available to sample none detected (0/4) 0 La-140 no algae available to sample no algae available to sample none detected (0/4) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

These samples are supplemental samples.

65

Table 3.8 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County, State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Analyses Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Kelp*

( pCi/kg ) DCM, 0.27 mi, 249° DCM, PON, POS 7C2, 4.7 mi, 124° Gamma Isotopic ( 20 )

Mn-54 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Fe-59 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Co-58 80 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Co-60 80 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Zn-65 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Zr-95 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Nb-95 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 I-131 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Cs-134 60 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Cs-137 80 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Ba-140 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 La-140 none detected (0/5) none detected ( 0 / 15 ) none detected (0/5) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

These samples are supplemental samples.

66

Table 3.9 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Vegetative Crops

( pCi/kg ) 6C1, 4.5 mi, 98° 3C1, 5F2, 6C1, 7C1, 7E1 7G1, 16.8 mi, 115° Gamma Isotopic ( 54 )

Mn-54 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Fe-59 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Co-58 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Co-60 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Zn-65 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Zr-95 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Nb-95 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 I-131 60 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Cs-134 60 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Cs-137 80 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Ba-140 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 La-140 None Detected (0/4) None Detected ( 0 / 42 ) None Detected ( 0 / 12 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

67

Table 3.10 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Milk

( pCi/Liter ) 5F2, 12.6 mi, 60° Iodine extraction ( 14 )

I-131 1 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Gamma Isotopic ( 14 )

Mn-54 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Fe-59 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Co-58 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Co-60 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Zn-65 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Zr-95 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Nb-95 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Cs-134 15 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Cs-137 18 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Ba-140 60 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 La-140 15 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Total Sr 89/90 ( 14 ) 2 Not Applicable Not Applicable None Detected ( 0 / 14 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

68

Table 3.11 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Meat

( pCi/kg )

BCM, 1.5 mi, 331° BCM CCM, 37 mi, 328° Gamma Isotopic ( 8 )

Mn-54 none detected (0/5) none detected (0/5) none detected (0/3) 0 Fe-59 none detected (0/5) none detected (0/5) none detected (0/3) 0 Co-58 none detected (0/5) none detected (0/5) none detected (0/3) 0 Co-60 none detected (0/5) none detected (0/5) none detected (0/3) 0 Zn-65 none detected (0/5) none detected (0/5) none detected (0/3) 0 Zr-95 none detected (0/5) none detected (0/5) none detected (0/3) 0 Nb-95 none detected (0/5) none detected (0/5) none detected (0/3) 0 I-131 60 none detected (0/5) none detected (0/5) none detected (0/3) 0 Cs-134 60 none detected (0/5) none detected (0/5) none detected (0/3) 0 Cs-137 80 none detected (0/5) none detected (0/5) none detected (0/3) 0 Ba-140 none detected (0/5) none detected (0/5) none detected (0/3) 0 La-140 none detected (0/5) none detected (0/5) none detected (0/3) 0 Total Sr 89/90 ( 8 ) 500 none detected ( 0 / 5 ) none detected ( 0 / 5 ) none detected ( 0 / 3 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis, e.g. (10/12) means 10 samples out of 12 collected showed activity.

69

Table 3.12 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County, State)

Lower Limit Indicator with Medium or Pathway Type and Total of Highest Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction Indicator Locations Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Ocean Sediment

( pCi/kg dry ) DCM, 0.27 mi, 249° DCM 7C2, 4.7 mi, 124° Gamma Isotopic ( 2 )

Mn-54 150 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Fe-59 300 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Co-58 150 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Co-60 150 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Zn-65 300 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Zr-95 300 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Nb-95 150 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 I-131 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Cs-134 150 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Cs-137 180 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Ba-140 600 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 La-140 150 none detected (0/1) none detected (0/1) none detected ( 0 / 1) 0 Fe-55 ( 2 ) 20,000 none detected ( 0 / 1 ) none detected ( 0 / 1 ) none detected ( 0 / 1) 0 Ni-63 ( 2 ) 4,000 none detected ( 0 / 1 ) none detected ( 0 / 1 ) none detected ( 0 / 1) 0 Total Sr 89/90 ( 2 ) 2,000 none detected ( 0 / 1 ) none detected ( 0 / 1 ) none detected ( 0 / 1) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

70

Table 3.13 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Analyses Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Beach Sand

( pCi/kg dry ) MDO, 4.7 mi, 336° AVA, MDO, PMO, CYA CBA, 28.5 mi, 330° Gamma Isotopic ( 10 )

Mn-54 150 none detected (0/2) none detected (0/8) none detected (0/2) 0 Fe-59 300 none detected (0/2) none detected (0/8) none detected (0/2) 0 Co-58 150 none detected (0/2) none detected (0/8) none detected (0/2) 0 Co-60 150 none detected (0/2) none detected (0/8) none detected (0/2) 0 Zn-65 300 none detected (0/2) none detected (0/8) none detected (0/2) 0 Zr-95 300 none detected (0/2) none detected (0/8) none detected (0/2) 0 Nb-95 150 none detected (0/2) none detected (0/8) none detected (0/2) 0 I-131 none detected (0/2) none detected (0/8) none detected (0/2) 0 Cs-134 150 none detected (0/2) none detected (0/8) none detected (0/2) 0 Cs-137 180 none detected (0/2) none detected (0/8) none detected (0/2) 0 Ba-140 600 none detected (0/2) none detected (0/8) none detected (0/2) 0 La-140 150 none detected (0/2) none detected (0/8) none detected (0/2) 0 Fe-55 ( 10 ) 20,000 none detected ( 0 / 2 ) none detected ( 0 / 8 ) none detected ( 0 / 2 ) 0 Ni-63 ( 10 ) 4,000 none detected ( 0 / 2 ) none detected ( 0 / 8 ) none detected ( 0 / 2 ) 0 Total Sr 89/90 ( 10 ) 2,000 none detected ( 0 / 2 ) none detected ( 0 / 8 ) none detected ( 0 / 2 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

71

Table 3.14 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Groundwater

( pCi/Liter ) 8S3, 0.4 mi, 140° 8S3, 0.4 mi, 140° WW2, 0.63 mi, 70° Gamma Isotopic ( 8 )

Mn-54 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 Fe-59 30 none detected (0/4) none detected (0/4) none detected (0/4) 0 Co-58 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 Co-60 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 Zn-65 30 none detected (0/4) none detected (0/4) none detected (0/4) 0 Zr-95 30 none detected (0/4) none detected (0/4) none detected (0/4) 0 Nb-95 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 I-131 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 Cs-134 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 Cs-137 18 none detected (0/4) none detected (0/4) none detected (0/4) 0 Ba-140 60 none detected (0/4) none detected (0/4) none detected (0/4) 0 La-140 15 none detected (0/4) none detected (0/4) none detected (0/4) 0 Gross Beta ( 8 ) 4 5.35 2.92 - 8.07 ( 4 / 4 ) 5.35 2.92- 8.07 ( 4 / 4 ) 3.8 2.43- 4.91 ( 3 / 4 ) 0 Fe-55 ( 8 ) 200 none detected ( 0 / 4 ) none detected ( 0 / 4 ) none detected ( 0 / 4 ) 0 Ni-63 ( 8 ) 50 none detected ( 0 / 4 ) none detected ( 0 / 4 ) none detected ( 0 / 4 ) 0 Total Sr 89/90 ( 8 ) 2 none detected ( 0 / 4 ) none detected ( 0 / 4 ) none detected ( 0 / 4 ) 0 Tritium H-3 ( 8 ) 400 none detected ( 0 / 4 ) none detected ( 0 / 4 ) none detected ( 0 / 4 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

72

Table 3.15 Environmental Radiological Monitoring Program Summary Report Period: 1/1/20 - 12/31/20 Name of Facility: Diablo Canyon Power Plant Location of Facility: San Luis Obispo, CA (County , State)

Lower Limit Indicator with Highest Medium or Pathway Type and Total of Annual Mean Number of Sampled Number of Detection(A) Name, Distance, and Direction All Indicator Locations All Control Locations Reportable (Unit of Measure) Analyses Performed (LLD) Mean( B) Range( B ) Mean ( B ) Range ( B ) Mean ( B ) Range ( B ) Occurrences Monitoring Wells GW1, 0.09 mi, 271° GW1, GW2, OW1, OW2 WW2, 0.63 mi, 70°

( pCi/Liter ) Gamma Isotopic ( 16 )

Mn-54 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Fe-59 30 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Co-58 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Co-60 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Zn-65 30 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Zr-95 30 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Nb-95 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 I-131 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Cs-134 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Cs-137 18 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Ba-140 60 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 La-140 15 none detected (0/4) none detected ( 0 / 12 ) none detected (0/4) 0 Gross Beta ( 16 ) 4 28.1 28.1- 28.1 ( 1/4 ) 15.8 5.84 - 28.1 ( 8/12 ) 3.8 2.43 - 4.91 ( 3/4 ) 0 Fe-55 ( 16 ) 200 none detected ( 0 / 4 ) none detected ( 0 / 12 ) none detected ( 0 / 4 ) 0 Ni-63 ( 16 ) 50 none detected ( 0 / 4 ) none detected ( 0 / 12 ) none detected ( 0 / 4 ) 0 Total Sr 89/90 ( 16 ) 2 none detected ( 0 / 4 ) none detected ( 0 / 12 ) none detected ( 0 / 4 ) 0 Tritium H-3 ( 16 ) 400 none detected ( 0 / 4 ) 498 412 - 586 ( 4/12 ) none detected ( 0 / 4 ) 0 Table Notation:

( A ) Unless specified, all required LLDs were met in accordance with Table 2.3

( B ) Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis e.g. , (10/12) means 10 samples out of 12 collected showed activity.

Note : Monitoring well tritium concentrations due to rain washout of an approved airborne discharge pathway from plant vents.

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Northern DCPP property near station 1C1 4.0 ANALYSIS OF ENVIRONMENTAL RESULTS 4.1 REMP SAMPLING VARIANCE / DEVIATIONS The DCPP Radiological Environmental Monitoring Program (REMP) allowed for deviations in the REMP sampling schedule "if samples were unobtainable due to hazardous conditions, seasonal unavailability, or malfunction of sampling equipment."

Such deviations did not compromise the program's effectiveness and were normally anticipated for any radiological environmental monitoring program. The DCPP REMP included both required and supplemental samples. This section described the variances/deviations with sampling.

4.1.1 DIRECT RADIATION The ISFSI projects team loaded an additional 9 spent fuel dry casks onto the DCPP ISFSI pad during the third quarter of 2018 (3Q18). This contributed to the increased station IS-3 through IS-7 exposures in 2020.

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4.1.2 AIRBORNE RADIOACTIVITY The 2020 mean percent availability for on-site and off-site particulate and iodine (P&I) air samplers was 99.9 percent. In other words, P&I air samplers were running 99.9 percent of the time. Less than 0.1 percent of run time could be attributed to equipment problems, filter exchanges, or calibration processes.

There were no REMP air sampler loss run times in 2020.

Actual 2020 percent availabilities for each station were as follows:

0S2 = 100 %

1S1 = 100 %

5F1 = 100 %

7D1 = 99.9 %

8S1 = 100 %

8S2 = 100 %

MT1 = 100 %

Airborne C-14 supplemental sampling was performed weekly at stations 8S1 (SE Sector),

0S2 (NW Sector), and 5F1 (control station in San Luis Obispo) in 2020.

General Engineering Labs and DCPP REMP personnel worked together to develop a method for sampling inorganic environmental airborne C-14 (as CO2). It should be noted that C-14 lab data were reported in units of µCi/m3 (not pCi/m3) within Appendix A.

GEL has monitored C-14 samples from various locations around the US. In some instances, a very slight negative bias has been observed in annual data sets. The bias was not enough to mask any true positive detection of C-14. GEL believes this bias may be the result of the sorbent picking up other chemical species in the field during the week-long collection. These chemical species (possibly SO2 or NO2) could cause some quenching effects in the liquid scintillation analysis and varies by site location. This chemical interference created a net effect where some field cartridges were slightly lower in activity than laboratory blanks. The bias was less than the average two sigma method uncertainty and significantly less than the method average detection limit.

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4.1.3 MARINE SAMPLES DCM supplemental quarterly intertidal algae samples were unavailable during all of 2020.

All remaining 2020 marine samples were collected as scheduled (including allowable variation).

The California Department of Fish and Game issued regulations prohibiting the collection of abalone along the central and southern coast of California. PG&E considers it unlikely that future collection of abalone will be allowed within the DCPP environs.

The REMP has therefore ceased routine abalone sampling. Note that the sampling of abalone was previously performed and was supplemental to the REMP.

4.1.4 TERRESTRIAL SAMPLES All 2020 terrestrial samples were collected as scheduled (including allowable variation) with the following exceptions:

Supplemental Blanchard Sheep Meat (BSM) and Blanchard Goat Meat (BGM) were not available and were not provided by the rancher during all of 2020.

Blanchard sheep and goats were not within 5 miles of the DCPP site in 2020.

4.1.5 SURFACE WATER, DRINKING WATER, AND GROUNDWATER Shallow French drain DY1 quarterly sampling was removed from the ODCM in 2019 due to known collection of rain washout tritium which was discussed in RIS2008-003.

Going forward, station DY1 will be pumped down annually after the rainy season and sampled during pump down. The DY1 sample results were reported in Appendix A.

Observation Well 02 (OW2) was dry and not collected during all four quarters of 2020.

All remaining 2020 water samples were collected as scheduled (including allowable variation).

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4.1.6 REPLICATE SAMPLES Replicate sampling was conducted within the REMP for program strength and quality.

A replicate sample is an additional sample (same matrix type and station) taken independently from the original scheduled REMP sample. The replicate sample collection is performed by a different person and shipped to GEL to ensure independent analysis result correlation and method consistency.

Replicate samples were taken from:

CBA - Cambria Beach Sand (3/18/20)

2F1 - Market Fish (5/14/20)

DCM - Diablo Cove Sea Water (8/10/20)

7C2 - Rattle Snake Canyon Sea Water (11/5/20)

The results of the replicate analyses were within expected correlation of routine sampling.

Intertidal mussel sampling 78

California sea lion colony directly off DCPP coastline 4.2 COMPARISON OF ACHIEVED LLDS WITH REQUIREMENTS For each analysis having a Lower Limit of Detection (LLD) requirement, criteria and process procedures were in place to achieve the calculated a-priori (before the fact)

LLD. Meeting those criteria satisfies the a-priori LLD requirements. The a-posteriori (after the fact) Minimum Detectable Concentration (MDC) for that analysis was also compared with the required a-priori LLD.

Table 2.3 of this report lists the required a-priori LLDs for environmental sample analyses required by the DCPP Radiological Environmental Monitoring Program.

Occasionally an LLD may have been unachievable due to sampling process situations, such as hold times between sampling and analysis.

Both the Novel Coronavirus 2019 (Covid-19) Pandemic and the unprecedented wildfire season in California in 2020 attributed to various a-priori LLD sampling process situations.

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Delivery time LLDs were not met for various DCPP REMP biological samples throughout 2020 due to Covid-19 government imposed shipping company constraints.

These samples were:

OEL drinking water (collected on 8/4/2020)

5F2 milk (collected on 8/11/2020)

5F2 milk (collected on 9/8/2020)

OUT, 7C2, DCM sea water (collected on 10/19/2020)

7C2, POS, PON, DCM kelp (collected on 10/19/2020)

BCM meat (collected on 10/22/2020)

3C1 vegetation and fruit (10/22/2020).

All of these items were resampled by REMP personnel and sent to the analyzation lab within a-priori LLD delivery time requirements.

Air sample volume collection a-priori LLDs were not met during various weeks in 2020 due to filter loading associated with the California wildfires. These weeks were:

8/19/2020 - 8/26/2020 (all air sample locations)

9/9/2020 - 9/16/2020 (all air sample locations)

9/23/2020 - 9/30/2020 (air sample locations 8S1, MT1)

9/30/2020 - 10/7/2020 (all air sample locations)

All other REMP samples met the specified a-priori LLD requirements in 2020.

Additional variance issues related to the Covid-19 pandemic:

The 2020 Land Use Census was performed by REMP personnel before the Covid-19 pandemic began in March of 2020. REMP personnel conducted follow-up interviews near the end of 2020 to see if any information had changed. Islay Creek Campground and Camp Keep had been closed in April of 2020 due to the pandemic. The numbers for day use and campground overnight use were not what was originally projected for 2020.

There were no other changes reported from Land Use Census interviews.

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4.3 COMPARISON OF RESULTS AGAINST REMP REPORTING LEVELS NRC notification was required whenever a Reporting Level listed in Table 2.4 of this report was exceeded. Reporting Levels were the environmental concentrations that relate to the ALARA design dose objectives of 10 CFR 50, Appendix I.

It should be noted that environmental isotopic concentrations were averaged over the calendar quarter for the purposes of this comparison, and that Reporting Levels applied only to DCPP plant related effluent radioactivity.

No REMP NRC Reporting Levels were exceeded during the 2020 monitoring period.

Intertidal algae sampling at 7C2 81

DCPP site coastline looking south 4.4 DATA ANALYSIS BY MEDIA TYPE The REMP data for each media type is discussed below. A sample was considered to yield a detectable measurement when the resultant concentration exceeded the MDC for that analysis.

4.4.1 Direct Radiation (Environmental TLDs)

Direct radiation was continuously measured at 32 locations surrounding DCPP using Panasonic UD-814 type thermo-luminescent dosimeters (TLDs). These 32 locations were made up of 29 indicator stations & 3 control stations. These Environmental (Env)

TLD station dosimeters were distributed and collected every calendar quarter for processing. Methodology from ANSI/HPS N13.37-2014 "Environmental Dosimetry -

Criteria for System Design and Implementation" was used to evaluate and report the Env TLD data. Historical background baseline values for each station were established using 2004 to 2014 Env TLD data.

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DCPP "Standard Quarter TLD Results" were measurements of all environmental gamma radiation sources (cosmic, terrestrial, radon, and man-made) at each station during the deployment period. Transient and lab storage background dose contributions were subtracted prior to reporting the "Standard (Std) Quarter (Qtr) TLD Results".

Technically, these TLDs read out in units of milliroentgen. Because gamma radiation has a quality factor of approximately 1 for conversion from milliroentgen to millirem, the environmental TLD unit of reporting was converted to millirem (mrem) for consistency of unit reporting and ease of exposure communications.

An evaluation of direct radiation measurements and member of public occupancy times within the site boundary indicated all federal criteria for member-of-public dose limits (10CFR20.1301) were conservatively met. An evaluation of direct radiation measurements indicated all federal EPA 40CFR190 criteria were conservatively met.

Comparing data from the 2020 DCPP Annual Radiological Effluent Release Report (ARERR), dose to a member-of-public resulting from gaseous effluent releases at DCPP was an extremely small fraction of annual Env TLD background dose. Therefore, it was concluded that gaseous effluents from DCPP had negligible impact on site related measured Env TLD values.

The following chart reports the 2020 Env "Standard Quarter TLD Results" for each individual station. These individual station results were compared to their "Historical Quarterly Baseline" values which were calculated using individual station data from 2004 to 2014.

Chart column reporting methodology was as follows:

ND = Not Detected

Quarterly Investigation Level Dose = Std Qtr TLD result - Historical Quarterly Baseline; If < 6, report "ND". If > 6, report value (mrem).

Annual TLD Result = Qtr 1 + Qtr 2 + Qtr 3 + Qtr 4 Std Qtr TLD Results

Annual Investigation Level Dose = Annual TLD Result - Historical Annual Baseline; If < 12, report "ND". If > 12, report value (mrem).

If Quarterly or Annual Investigation Level Dose was detected, an evaluation of DCPP facility contribution was conducted and explained within this report.

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2020 Quarterly REMP Env TLD Analysis 2020 Annual REMP Env TLD Analysis Historical 2020 Standard Quarter 2020 Quarterly Investigation Historical 2020 Annual 2020 Annual DCPP Distance Quarterly Baseline TLD Results (mrem) Level Dose (mrem) Annual Baseline TLD Result Investigation Level Station ID in miles (mrem) Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (mrem) (mrem) Dose (mrem)

MT1 0.2 21.5 18.6 18.3 20.2 17.4 ND ND ND ND 86.0 74.6 ND WN1 0.2 12.7 12.0 11.3 12.8 14.1 ND ND ND ND 50.8 50.2 ND 0S1 0.1 20.7 19.1 18.1 21.7 20.8 ND ND ND ND 82.8 79.7 ND 5S1 0.4 23.1 21.9 20.5 21.9 21.1 ND ND ND ND 92.4 85.4 ND 6S1 0.5 14.0 13.7 12.4 13.4 12.7 ND ND ND ND 56.0 52.2 ND 8S1 0.5 17.1 16.3 15.8 16.7 14.9 ND ND ND ND 68.4 63.7 ND 8S2 1.1 21.0 19.2 17.7 20.5 18.4 ND ND ND ND 84.0 75.8 ND 5S3 0.7 19.2 17.2 16.5 19.5 16.7 ND ND ND ND 76.8 69.9 ND 2F2 11.2 14.1 13.7 12.8 13.1 12.1 ND ND ND ND 56.4 51.7 ND 2D1 6.9 12.8 12.5 11.6 13.1 11.8 ND ND ND ND 51.6 49.0 ND 4D1 7.6 11.9 10.5 10.1 11.1 9.7 ND ND ND ND 47.6 41.4 ND 5F1 10.2 17.5 16.0 15.4 17.2 14.9 ND ND ND ND 70.0 63.5 ND 1A1 1.6 12.0 11.0 9.8 11.9 11.0 ND ND ND ND 48.0 43.7 ND 7D2 7.6 16.6 14.9 14.4 17.0 15.4 ND ND ND ND 66.4 61.7 ND 7G2 17.3 17.6 16.1 16.2 17.8 16.0 ND ND ND ND 70.4 66.1 ND 7C1 4.1 18.1 14.4 16.7 17.2 16.6 ND ND ND ND 72.4 65.0 ND 7F1 10.8 17.1 16.0 15.5 17.8 15.6 ND ND ND ND 68.4 64.9 ND 0B1 3.6 10.2 8.7 8.1 10.0 11.8 ND ND ND ND 40.8 38.6 ND 7D1 6.6 11.2 10.4 10.0 10.6 10.0 ND ND ND ND 44.8 41.1 ND 4C1 5.8 10.6 10.1 9.9 10.4 9.1 ND ND ND ND 42.4 39.6 ND 0S2 0.5 17.7 14.7 16.1 17.0 17.5 ND ND ND ND 70.8 65.3 ND 1S1 0.4 17.4 16.2 14.3 17.5 14.9 ND ND ND ND 69.6 63.0 ND 2S1 0.2 16.8 15.3 14.9 16.3 14.5 ND ND ND ND 67.2 61.1 ND 3S1 0.4 20.9 18.1 18.9 20.4 17.9 ND ND ND ND 83.6 75.4 ND 4S1 0.5 19.5 18.9 17.5 19.7 17.4 ND ND ND ND 78.0 73.5 ND 7S1 0.3 18.5 19.3 17.6 19.4 17.9 ND ND ND ND 74.0 74.2 ND 9S1 0.4 22.6 20.6 20.6 21.5 20.4 ND ND ND ND 90.4 83.2 ND 1C1 4.7 13.2 13.0 11.8 12.8 11.8 ND ND ND ND 52.8 49.5 ND 5C1 4.7 16.4 14.0 14.8 17.6 14.7 ND ND ND ND 65.6 61.1 ND 3D1 6.2 12.8 12.5 11.4 13.0 14.0 ND ND ND ND 51.2 50.8 ND 6D1 8.3 14.1 13.0 12.7 14.3 13.2 ND ND ND ND 56.4 53.2 ND 5F3 12.7 17.2 14.1 13.7 14.6 13.3 ND ND ND ND 68.8 55.7 ND ND = Not Detected The 2020 AREOR historical baselines have been determined using ANSI/HPS N13.37-2014 methodology and Env TLD station results from approximately 2004 to 2014.

Quarterly Investigation Level Dose = Standard Quarter TLD result - Historical Quarterly Baseline. If < 6, report "ND". If > 6, report value (mrem).

Annual TLD Result = Qtr 1 + Qtr 2 + Qtr 3 + Qtr 4 Standard Quarter TLD Results Annual Investigation Level Dose = Annual TLD Result - Historical Annual Baseline. If < 12, report "ND". If > 12, report value (mrem).

See DCPP Station ID Maps in Figure 2.1 and Figure 2.2 84

The following graph illustrated overall trending of Env TLDs with regard to distance from the DCPP plant site. The Env TLD results were measurements of all environmental gamma radiation sources (cosmic, terrestrial, radon, and man-made) during the deployment period to allow for trending.

Inner ring, outer ring, special interest, and control stations were combined and averaged to obtain a single standard quarter value for each represented plot line.

Inner ring, outer ring, special interest, and control stations Env TLD averages remained within and trended with pre-operational Env TLD ranges. DCPP operations did not affect Env TLD results.

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The following graph illustrated averaged Env TLD results from the southeast sector (stations 8S1, 8S2) and northwest sector (stations 0S1, 0S2, 0B1). The Env TLD results were measurements of all environmental gamma radiation sources (cosmic, terrestrial, radon, and man-made) during the deployment period to allow for trending.

These sectors were chosen for graphical trending due to their historically high averaged wind rose directions and would therefore indicate the most gaseous effluent impact on Env TLD results.

The southeast and northwest sectors Env TLD averages trended with pre-operational Env TLD ranges. DCPP operations did not affect Env TLD results within these sectors.

Averaged control stations (2F2, 4D1, 5F1) were provided for reference.

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Direct Radiation from onsite ISFSI DCPP was licensed with an exclusion area boundary (i.e. site boundary) as an approximate 880-yard radius from U-1 Containment center. No permanent public access was permitted within the exclusion area. The unrestricted area (i.e. outside the site boundary) surrounding DCPP was sparsely inhabited out to five miles from the site (ref.

2020 Land Use Census within Section 8).

The direct radiation levels within a very small area surrounding the onsite ISFSI were elevated due to dry cask spent fuel storage. ISFSI pad TLD stations IS-1 through IS-8 were located adjacent to the ISFSI pad fencing (see map in Figure 2.2 of this report). The remaining onsite areas were not affected with exposure due to the ISFSI topographical elevation and placement within an onsite hillside which provided radiation shielding to the rest of the site. There was a total of 58 loaded dry casks stored within the onsite ISFSI in 2020.

The first spent fuel dry cask canister was loaded onto the ISFSI pad in June 2009.

The small increase in radiation levels at the ISFSI pad prior to the first spent fuel canister load was due to storage of Radioactive Material (RAM) equipment in seatrains at the ISFSI pad prior to an outage. These seatrains of RAM were removed prior to the first load of spent fuel dry cask canisters.

Dry cask loading Campaign # 2 occurred in May 2010.

Dry cask loading Campaign # 3 occurred during the first quarter of 2012 and ended on 3/17/2012.

Dry cask loading Campaign # 4 occurred from August to October of 2013.

Dry cask loading Campaign #5 occurred from 5/1/15 to 7/3/15 with the addition of 8 dry casks onto the onsite ISFSI.

Dry cask loading Campaign #6 occurred from 8/8/16 to 11/12/16 with the addition of 12 dry casks onto the onsite ISFSI.

Dry cask loading Campaign #7 occurred from 6/9/18 to 8/18/18 with the addition of 9 dry casks onto the onsite ISFSI.

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The following chart reports the 2020 ISFSI Env "Standard Quarter TLD Results" for each individual station. These individual ISFSI station results were compared using the 2004 to 2014 "Historical Quarterly Baseline" and "Historical Annual Baseline" value at station 5S1.

Station 5S1 was used for historical baseline purposes due to 5S1 close proximity to the ISFSI pad and 5S1 pre-ISFSI historical data.

Chart column reporting methodology was as follows:

ND = Not Detected

Quarterly Investigation Level Dose = Std Qtr TLD result - Historical Quarterly Baseline; If < 6, report "ND". If > 6, report value (mrem).

Annual TLD Result = Qtr 1 + Qtr 2 + Qtr 3 + Qtr 4 Std Qtr TLD Results

Annual Investigation Level Dose = Annual TLD Result - Historical Annual Baseline; If < 12, report "ND". If > 12, report value (mrem).

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2020 Quarterly ISFSI Env TLD Analysis 2020 Annual ISFSI Env TLD Analysis Historical 2020 Standard Quarter 2020 Quarterly Investigation Historical 2020 Annual 2020 Annual DCPP Distance Quarterly Baseline TLD Results (mrem) Level Dose (mrem) Annual Baseline TLD Result Investigation Level Dose Station ID in miles (mrem) Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 (mrem) (mrem) (mrem)

IS-1 0.3 23.1 23.1 23.0 24.6 22.7 ND ND ND ND 92.4 93.6 ND IS-2 0.3 23.1 24.2 23.9 23.4 23.1 ND ND ND ND 92.4 94.6 ND IS-3 0.3 23.1 58.5 56.8 57.1 51.7 35.4 33.7 34.0 28.6 92.4 224.1 131.7 IS-4 0.3 23.1 106.7 98.2 110.3 95.1 83.6 75.1 87.2 72.0 92.4 410.4 318.0 IS-5 0.3 23.1 41.8 42.7 47.2 40.5 18.7 19.6 24.1 17.4 92.4 172.2 79.8 IS-6 0.3 23.1 41.6 40.3 44.9 38.2 18.5 17.2 21.8 15.1 92.4 165.0 72.6 IS-7 0.3 23.1 46.5 44.2 47.5 40.9 23.4 21.1 24.4 17.8 92.4 179.1 86.7 IS-8 0.3 23.1 24.1 22.3 25.7 22.5 ND ND ND ND 92.4 94.6 ND ND = Not Detected The 2020 AREOR historical baselines have been determined using ANSI/HPS N13.37-2014 methodology and Env TLD station 5S1 results from approximately 2004 to 2014.

The historical baseline from REMP Station 5S1 was used for the ISFSI stations due to it's onsite close proximity to ISFSI.

Quarterly Investigation Level Dose = Standard Quarter TLD result - Historical Quarterly Baseline. If < 6, report "ND". If > 6, report value (mrem).

Annual TLD Result = Qtr 1 + Qtr 2 + Qtr 3 + Qtr 4 Standard Quarter TLD Results Annual Investigation Level Dose = Annual TLD Result - Historical Annual Baseline. If < 12, report "ND". If > 12, report value (mrem).

See DCPP Station ID Map in Figure 2.2 The Quarterly Investigation Level and Annual Investigation Level doses were due to spent fuel dry casks stored on the ISFSI pad.

The DCPP ISFSI Pad is located conservatively within the DCPP site boundary and is not located within the unrestricted area.

The DCPP ISFSI Pad is topographically elevated above most of the site and is built into a hillside. These characteristics shield onsite locations from ISFSI related radiation.

No permanent public access is permitted onsite within the DCPP site boundary.

Access occupancy surrounding the onsite ISFSI is restricted and controlled by DCPP Security. The above reported annual exposures are 24 x 365 occupancy exposure at that location.

If someone was to reside in a low occupancy condition (about 2.5 hrs per week) at ISFSI location IS-4 all year, their resulting exposure would be about 4.7 mrem/year above background.

10CFR20.1301 onsite member of public exposure and 40CFR190 unrestricted area exposure were evaluated. Dose limits were not exceeded and were conservatively met.

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"Quarterly and Annual Investigation Level Dose" was detected at ISFSI Env TLD stations IS-3 through IS-7 due to DCPP spent fuel dry casks stored on the ISFSI pad.

The DCPP ISFSI Pad was not located within the unrestricted area and therefore uncontrolled member-of-public access to PG&E property did not result in any unrestricted area exposure. An evaluation of direct radiation measurements within the unrestricted area indicated all federal EPA 40CFR190 criteria for public dose limits were conservatively met.

Uncontrolled public access was not permitted within the DCPP site boundary. The DCPP ISFSI Pad was located conservatively within the DCPP site boundary. The DCPP ISFSI Pad was topographically elevated above most of the site and was built into a hillside.

These characteristics shielded most onsite locations from ISFSI related radiation.

Personnel access surrounding the onsite ISFSI was restricted and controlled by DCPP security to a low occupancy condition of less than 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months per week. The reported ISFSI Env TLD annual exposures were for an occupancy condition of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months per day and 365 days per year surrounding the ISFSI pad. Therefore, if someone was to reside in a low occupancy condition at ISFSI location IS-4 all year, their resulting annual exposure would have been approximately 4.7 millirem above annual background radiation exposure. This total 4.7 millirem annual exposure would have been approximately equivalent to exposure from a ten-hour airline flight. An evaluation of direct radiation measurements and member-of-public occupancy times within the site boundary indicated all federal criteria for member-of-public dose limits (10CFR20.1301) were conservatively met.

The following page contains a trend graph of the onsite ISFSI pad averaged TLD results (IS-1 through IS-8) and a picture of the ISFSI pad. The Env TLD results were measurements of all environmental gamma radiation sources (cosmic, terrestrial, radon, and man-made) during the deployment period to allow for trending.

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DCPP ISFSI Pad within hillside, on south side of the make-up water reservoirs 91

4.4.2 Airborne Air particulate and radioiodine samples were collected weekly from six indicator stations (MT1, 0S2, 1S1, 7D1, 8S1, and 8S2) in the DCPP environs and at one control station (5F1). A total of 364 air particulate filters and 364 iodine cartridges were collected and analyzed as part of the normal REMP.

Natural occurring gross beta activity was detected in every weekly air particulate sample collected from all indicator and control stations. Comparison of the data showed that the mean values of gross beta activities for the indicator stations were consistent with those obtained for the control station and historical trending. Normal background gross beta values ranged from 2.49E-3 to 7.99E-2 pCi/m3.

Gamma isotopic analyses were performed on quarterly composites of the 13 air particulate filters from each of the REMP air stations. The midpoint date of the quarter was used to label the composite. There were no gamma isotopic detections in 2020.

A total of 364 REMP weekly TEDA air cartridges were analyzed for I-131 in 2020.

There were no detections of I-131 in 2020.

Airborne Carbon-14 samples were collected weekly from two indicator stations (8S1, 0S2) in the DCPP environs and at one control station (5F1). A total of 156 Carbon-14 cartridges were collected and analyzed as part of the REMP. Carbon-14 was detected at station 8S1 due to facility operations during the weeks of 1/22/2020 - 1/29/2020, 7/29/2020 - 8/5/2020, 10/7/2020 - 10/14/2020, and 10/17/2020 - 10/21/2020.

Carbon-14 was detected at station 0S2 during the week of 10/14/2020 - 10/21/2020 due to facility operations. Exposure results were negligible and actual exposure results can be referenced in the 2020 DCPP ARERR found on the NRC website. All other Carbon-14 air cartridge results were non-detectible.

Appendix A contains the individual air sampling station data results.

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Great White Shark in Diablo Cove 4.4.3 Drinking Water and Ocean Surface Water Drinking Water Drinking water samples were collected from indicator stations 1A2, 5S2, DW1, WN2, and control station OEL. The samples were analyzed for gamma emitters, gross beta, tritium, total strontium 89/90, Iron-55, and Nickle-63. No DCPP related radionuclides were detected in any of the 2020 drinking water samples.

The results of the drinking water samples were individually listed in Appendix A.

Ocean Surface Water Ocean surface water samples were collected monthly from indicator stations DCM, OUT, and control station 7C2. The samples were analyzed for gamma emitters, gross beta, tritium, total strontium 89/90, Iron-55, and Nickle-63. No DCPP related radionuclides were detected in any of the 2020 ocean surface water samples.

The results of the surface water samples were individually listed in Appendix A.

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Kelp forest directly off the DCPP site coastline 4.4.4 Ingestion Marine Biological Samples Mussels were collected quarterly from stations DCM, POS, and 7C2. Mussels were collected annually from station PON (due to availability at station PON). No DCPP related radionuclides were detected in any of the 2020 mussel samples.

Fish samples were collected quarterly from stations DCM, PON, POS, 7C2 (control), and a local fish market (2F1 or 7D3). Market fish samples were locally caught rock fish.

Cs-137 was detected in fish at the following stations, dates, and concentrations:

2F1 Rockfish 4/13/2020 8.41 pCi/kg

2F1 Rockfish 5/14/2020 14.0 pCi/kg

7D3 Rockfish 5/14/2020 14.7 pCi/kg Pre-operational (pre-1985) DCPP REMP sampling observed measurable Cs-137 in fish and sediment due to atmospheric nuclear weapons testing fallout from the 1960's and 94

1970's. Finding Cs-137 in fish or sediment has been historically common in SLO County and the DCPP environs due to atomic weapons testing fallout. The approximate historical fish Cs-137 concentrations have ranged from 3 to 14 pCi/kg. The 2020 concentrations of Cs-137 detected in fish coincided with the historical pre-operational scope of data.

This Cs-137 activity was also in agreement with the 1981 California Dept of Health Services Radiological Health Branch report and was considered part of SLO County background radioactivity. The preoperational 1981 ranges of Cs-137 observed in the Diablo cove (DCM) fish were 0 to 26 pCi/kg (decay corrected 0 to 11 pCi/kg in 2020).

The 1981 ranges of Cs-137 observed in market fish were 0 to 38 pCi/kg (decay corrected 0 to 15 pCi/kg in 2020). The 1981 ranges of Cs-137 observed in ocean sediment were 0 to 93 pCi/kg (decay corrected 0 to 38 pCi/kg in 2020). The 1981 ranges of Cs-137 observed in soil were 0 to 298 pCi/kg (decay corrected 0 to 121 pCi/kg in 2020).

Another recent background source of Cs-137 into California environs was due to the March 2011 Fukushima Event and subsequent jet stream isotopic dispersion to the United States.

Because Cs-137 has an isotopic half-life of approximately 30 years, this contaminant should be detected in the California environs for the next 10 to 40 years depending on initial concentration and the detection sensitivity of the REMP analyses. Cs-137 has a longer environmental half-life in coastal seawaters than in open oceans due to input sources like rain watershed runoff and storm condition sediment re-suspension.

There were also no Cs-134 found in these fish samples. Cs-134 has a shorter isotopic half-life (approximately 2 years), would be indicative of nuclear reactor fission products, and would not be attributed to atomic weapons testing. Because Cs-134 was absent in the REMP fish analyses; fish Cs-137 concentrations were attributed to either pre-1980's nuclear weapons testing or Fukushima related fallout with sediment re-suspension into watershed/storm runoff.

All marine fish and mussel samples did not detect any DCPP related radionuclides in 2020. The results of marine biological samples were individually listed in Appendix A.

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Station PON Station MDO beach sampling Marine Aquatic Vegetation Supplemental marine aquatic kelp sampling was performed quarterly at REMP sample indicator stations DCM, PON, POS, and 7C2 (control).

Supplemental intertidal algae sampling was performed quarterly at REMP sample station 7C2. Station DCM algae was unavailable in 2020.

Each sample was analyzed for gamma emitting radionuclides. No DCPP related isotopes were detected in 2020. The results of the marine aquatic vegetation sampling were individually listed in Appendix A.

Ocean Sediment and Recreational Beach Sampling Ocean sediment samples were collected annually from stations DCM and 7C2.

Supplemental recreational beach sand samples were collected semi-annually from stations AVA, MDO, PMO, CYA, and CBA. Each sample was analyzed for gamma emitting radionuclides, total strontium 89/90, Iron-55, and Nickle-63.

Only natural occurring isotopes where detected in the ocean sediment and recreational beach sand samples collected for 2020. The results of ocean sediment and recreational beach sand sampling were individually listed in Appendix A.

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Station 7G1 vegetation in Arroyo Grande CA 4.4.5 Vegetation (Food Crops)

Samples of broad leaf vegetation were collected monthly (when available) from two indicator stations (5F2 and 7C1), and one control location (7G1).

Supplemental samples were also collected quarterly from residence or commercial gardens at stations 3C1, 6C1, and 7E1. The samples were analyzed for gamma emitting radionuclides.

No DCPP related isotopes were detected in 2020 vegetation.

The analysis results of vegetation sampling were individually listed in Appendix A.

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Cal Poly Station 5F2 4.4.6 Milk There are no milking animals (for human consumption) within 5 miles of the plant site.

In substitution, the DCPP REMP required additional air sampling at stations 1S1 and 8S2.

Supplemental samples of milk were collected monthly from Cal Poly Farm (station 5F2) due to the Cal Poly dairy being the closest milk producer relative to the DCPP site and regardless of the availability of milk stations within 5 miles of the plant.

The milk samples were analyzed for gamma emitting radionuclides, Iodine-131, and total strontium 89/90. No DCPP related radionuclides were detected in station 5F2 milk samples during 2020.

The results of the milk samples were individually listed in Appendix A.

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Ranchers near Station 7C1 4.4.7 Meat Products Meat products were collected quarterly when available or provided from landowners.

Blanchard cattle were allowed to graze on the northern DCPP lands during 2020.

Blanchard Cow Meat (BCM) was sampled quarterly for gamma emitting radionuclides and total strontium 89/90.

Supplemental Blanchard Sheep Meat (BSM) and Blanchard Goat Meat (BGM) were not available and were not provided by the rancher during all of 2020. Blanchard sheep and goats were not within 5 miles of the DCPP site in 2020.

Station CCM, free range, grass fed beef sampling was conducted outside the influence of DCPP. Quarterly CCM meat was purchased by REMP personnel from the Whole Foods Market in SLO and consisted of Hearst Ranch ground beef.

No DCPP related isotopes were detected in meat during 2020. The results of the meat samples were individually listed in Appendix A.

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Station GW2 groundwater sampling 5.0 GROUND WATER MONITORING Diablo Canyon is committed to improving management of situations involving inadvertent radiological releases that get into onsite groundwater. This commitment reflects the nuclear industrys high standard of public radiation safety and protection of the environment. Trust and confidence on the part of local communities, California State, the NRC, and the public is paramount to this commitment.

Groundwater gradient studies of the DCPP ISFSI site and a general assessment of sub-regional hydro-geologic conditions indicates that groundwater (subsurface) flow beneath the Diablo Canyon power block is west to northwest toward the Pacific Ocean. Any groundwater present beneath the DCPP power block was not used as a source of drinking water.

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5.1 NEI 07-07 GROUNDWATER PROTECTION INITIATIVE - REPORTING 5.1.1 NEI 07-07 Objective 2.4 (b), Annual Reporting: "Document in the AREOR all on-site ground water sample results that are included in the REMP as described in the DCPP Offsite Dose Calculation Manual (ODCM)".

Onsite groundwater monitoring points are described in the REMP and reported in this 2020 Annual Radiological Environmental Operating Report (AREOR) as follows:

Observation Well 01 (OW1), Observation Well 02 (OW2), DCSF96-1 (8S3), Water Well 02 (WW2), Groundwater Well 1 (GW1), Groundwater Well 2 (GW2), and Diablo Creek Outlet (WN2) were used for Groundwater Protection Initiative (GPI) data reporting and were described in 2020 DCPP AREOR Table 2.1.

5.2 GROUNDWATER SAMPLING OVERVIEW:

As part of the nuclear industry NEI 07-07 Groundwater Protection Initiative (GPI), DCPP began sampling various ground water sources in 2006. These sources included onsite power block french-drain monitoring wells (OW1 & OW2), an aquifer well (WW2),

Diablo Canyon creek (5S2 & WN2), up-gradient shallow well (8S3), and a groundwater spring (1A2). Two additional downgradient groundwater monitoring wells (stations GW1 and GW2) were installed along the western side of the DCPP site on December 14, 2011. REMP began sampling these two new wells during the first quarter of 2012.

One groundwater aquifer well (WW2) was available within the plant site boundary. This well was located about 250 feet above and to the east of the power block. WW2 was sampled quarterly for gamma emitters, gross beta, tritium, total strontium 89/90, Iron-55, and Nickle-63. No plant related radionuclides were detected in 2020.

One shallow (approximately 70 feet deep) up-gradient monitoring well (8S3) was located southeast at approximately 0.4 miles from the power block. 8S3 was sampled quarterly for gamma emitters, gross beta, tritium, total strontium 89/90, Iron-55, and Nickle-63.

No plant related radionuclides were detected in 2020.

Two shallow (approximately 37 to 73 feet deep) french-drain systems discharge into two monitoring wells located within the plant protected area and in close proximity to the containment structures, spent fuel pools, and radiologically controlled area auxiliary 101

building. These french-drain system monitoring wells were stations Observation Well 01 (OW1) and Observation Well 02 (OW2).

OW2 was not sampled in 2020 due to no water present in the well during the entire 2020 timeframe. There has been an ongoing severe drought in San Luis Obispo County which contributed to this dry well.

Station OW1 contained low levels of tritium throughout 2020 due to rainwater washout of gaseous tritium exiting the plant vent system. This tritium was evaluated and attributed to the rain-washout of gaseous tritium exiting the plant vent system via an approved monitored radioactive effluent discharge path. DCPP conducted rain-washout studies to document this phenomenon. Rain-washout tritium communicated with these french-drain systems via building structure to ground interfaces. Once rain water entered the monitoring wells, the water remained stagnant until another rain event caused transport. Subsequent quarterly sampling routinely indicated consistent tritium values due to monitoring well stagnation. These tritium concentrations were evaluated and were not due to a plant system leak or spill.

OW1 was connected to subsurface groundwater flow fissures and routinely trends with rain fall.

The specific ranges of tritium detected in these power block monitoring wells for 2020 were as follows:

OW1 - Observation Well 01 (412 to 586 pCi/L) 4 of 4 sample tritium analysis.

OW2 - Observation Well 02 ; no samples collected (well dry).

No other DCPP related isotopes were detected in OW1 or OW2 during 2020.

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As mentioned previously, two down-gradient monitoring wells were added to the REMP in 2012.

Groundwater Well 1 (GW1) was located between the DCPP protected area and the Pacific Ocean cliff boundary. This well opening was located at approximately 85' above sea level on the same plane as the power block and was approximately 85' deep.

Groundwater Well 2 (GW2) was located between the DCPP protected area and the Pacific Ocean cliff boundary. This well opening was located at approximately 85' above sea level on the same plane as the power block and was approximately 85' deep.

The specific ranges of tritium detected in GW1/GW2 monitoring wells for 2020 were as follows:

GW1 - Groundwater Well 1 ; no tritium detected

GW2 - Groundwater Well 2 ; no tritium detected No other DCPP related isotopes were detected in GW1 or GW2 in 2020.

All other samples of groundwater at 1A2, 5S2, 8S3, and WN2 did not indicate the presence of tritium or any other DCPP related isotopes (only NORM isotopes were observed) in 2020.

The results of groundwater sampling were individually listed in Appendix A.

Rain washout of tritium is discussed within NRC Regulatory Issue Summary (RIS) 2008-003, "Return/Re-use of Previously Discharged Radioactive Effluents".

The following pages show the site structures, monitoring well locations, elevations, and groundwater gradient patterns on the site.

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Irish Hills SITE 150 Switchyard 200 5S2 Water Well 05 (214.7 ft) Legend k

ee 100 Cr Water Well 02 Approximate Site Boundary blo (208.3 ft)

Di I Power Block a

IS FS 150 Groundwater Elevation Contour 50 (feet above mean sea level)

OW1 Monitoring Well (45.8 ft) Power Block 200 Water Well GW1 WN2 (4.9 ft) French Drain Wells DY1 Surface Water Sampling Location OW2 Diablo Diablo Creek Cove GW2 Above Ground (12.5 ft)

Piped Section NOTES:

- Layers were digitized using satellite imagery for graphical representation. Locations are 8S3 approximate (96.3 ft) 15 0 - Groundwater elevations and contours from Cardno Entrix (June, 2012) 50 100 - Satellite imagery taken on 5/10/2010 Reproduced under license with ArcGIS 10.1 G:\Graphics\Clients_L_P\PGandE\DiabloCanyon_CA\MXD\SiteLayout_20140801.mxd - brett.shaver - 8/1/2014 0 250 500 1,000 1,500 Feet Figure 2: Site Layout Diablo Canyon Power Plant Avila Beach California 104

SITE k

ee Cr lo ab Legend Di Surface Water Sampling Location Monitoring Well OW1 Fu e French Drain Infrastructure:

an French Drain Wells lH d li Unit 1 Refueling Approximate French Drain Location 1 ng Water Storage Tank Unit ent Facility Infrastructure:

m Bu on tain C ild and Drain Line Spent Fuel Storage Pools WN2 in g 115' Exterior Sump Auxiliary Building Sump GW1 y

iar Deep Foundation / Power Block xil g Au ldin s ui Building Drain Line B DY1 Laundry and Radwaste Auxiliary Unit 2 Refueling NOTES:

Water Storage Tank Building - Layers were digitized using satellite imagery ine li nd Sump Aux Sea Water rb for graphical representation. Locations are Tu ding il Ha el Discharge approximate Bu Fu - Satellite imagery taken on 5/10/2010 2 ng Reproduced under license with ArcGIS 10.1 Unit ent m

tain Con ing ild e Bu a rg e ch r Dis ructu G:\Graphics\Clients_L_P\PGandE\DiabloCanyon_CA\MXD\PlantLayout_20140801.mxd - brett.shaver - 8/1/2014 OW2 S t Diablo Cove 0 25 50 100 150 200 250 Feet GW2 Figure 3: Plant Layout Diablo Canyon Power Plant Avila Beach California 105

Old Steam Generator Storage Facility looking northwest 6.0 OSGSF MONITORING An Old Steam Generator Storage Facility (OSGSF) long term storage vault was constructed within the DCPP site boundary in 2007 for storage of eight retired DCPP steam generators and two retired DCPP reactor heads. This OSGSF did not cause any changes to the ambient direct radiation levels within the DCPP environs during 2020.

The OSGSF in-building sumps were inspected quarterly by REMP personnel.

For reference, the following equipment was placed into the OSGSF on the following dates:

3/2/08 (outage 2R14), four DCPP Unit Two (U-2) Steam Generators

2/14/09 (outage 1R15), four DCPP Unit One (U-1) Steam Generators

11/6/09 (outage 2R15), one DCPP Unit Two (U-2) Reactor (Rx) Head

10/23/10 (outage 1R16), one DCPP Unit One (U-1) Rx Head 106

7.0 CROSS CHECK PROGRAM 107

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tfl 3* 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 2020 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)

GEL Laboratories LLc PO Box 30712 Charleston, SC 29417 2040 Savage Road Charleston, SC 29407 P 843.556.8171 F843.766.1178 www.gel.com 109

2020 ANNUAL QUALITY ASSURANCE REPORT FOR THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP)

Approved By March 10, 2021 Robert L. Pullano Date Director, Quality Systems Rev. 1 110

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 2020 Radiological Proficiency Testing Results and Acceptance Criteria ..................... 12 Table 2 2020 Eckert & Ziegler Analytics Performance Evaluation Results ............................... 23 Table 3 2020 DOE Mixed Analyte Performance Evaluation Program (MAPEP) Results ......... 24 Table 4 2020 ERA Program Performance Evaluation Results .................................................. 27 Table 5 2020 ERA Program (MRAD) Performance Evaluation Results .................................... 29 Table 6 REMP Intra-Laboratory Data Summary: Bias and Precision By Matrix...43 Table 7 All Radiological Intra-Laboratory Data Summary: Bias and Precision By Matrix....45 Table 8 2020 Corrective Action Report Summary.......52 111

TABLE OF CONTENTS (CONTINUED)

FIGURES Figure 1 Cobalt-60 Performance Evaluation Results and % Bias ........................................... 34 Figure 2 Cesium-137 Performance Evaluation Results and % Bias ....................................... 35 Figure 3 Tritium Performance Evaluation Results and % Bias................................................. 36 Figure 4 Strontium-90 Performance Evaluation Results and % Bias ....................................... 37 Figure 5 Gross Alpha Performance Evaluation Results and % Bias ........................................ 38 Figure 6 Gross Beta Performance Evaluation Results and % Bias ......................................... 39 Figure 7 Iodine-131 Performance Evaluation Results and % Bias .......................................... 40 Figure 8 Americium-241 Performance Evaluation Results and % Bias ................................... 41 Figure 9 Plutonium-238 Performance Evaluation Results and % Bias .................................... 42 112

2020 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 2020 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 2020.

Inter-laboratory QC results analyzed during 2020 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:

Proficiency testing and other inter-laboratory comparisons 113

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 the PT provider, samples are managed and analyzed in the same manner as environmental samples from GELs clients.

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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 supplier, 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 17025:2005

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 (20-RAD-001) was conducted in August and September, 2020. There were no findings or observations and two 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.

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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) 116

7. Summary of Data Results During 2020, 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 2020. Of the four hundred fifty-six (456) total results, 97.1% (443 of 456) 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 ninety-one (91) 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 42 and 43 were analyzed by the laboratory. Of the one hundred twenty-eight (128) analyses, 99% (127 out of 128) fell within the PT providers acceptance criteria.

10. Summary of Participation in the ERA MRaD PT Program The ERA MRad program provided samples (MRAD-32 and MRAD-33) for one hundred ninety-eight (198) individual environmental analyses. Of the 198 analyses, 98% (194 out of 198) fell within the PT providers acceptance criteria.

11. Summary of Participation in the ERA PT Program The ERA program provided samples (RAD-120, RAD-121, and RAD-122) for forty (40) individual environmental analyses. Of the 40 analyses, 80% (32 out of 40) fell within the PT providers acceptance criteria.

All corrective actions 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 the problem is required. Formal corrective action investigations include root cause analysis.

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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 2020. It has been determined that causes of the unacceptable results did not impact any data reported to our clients.

CARR200224-1274 of PT Failures in RAD-120 for Drinking Water Sr-89, H-3, I-131

CARR 200902-1278 of PT Failure in MRAD - 32 for: U-238 filter, Total U (mass) filter, U-234 water, Total U water

CARR 200902-1287 of PT Failure in RAD-122 in drinking water for: Ba-133 and Co-60

CARR 201214-1296 of PT Failure in MAPEP 43: Fe-55 in soil 118

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. 2003 NELAC Standard, National Environmental Laboratory Accreditation Program

11. 2009 TNI Standard, The NELAC Institute, National Environmental Accreditation Program

12. MARLAP, Multi-Agency Radiological Laboratory Analytical Protocols

13. 10 CFR Part 21, Reporting of Defects and Noncompliance

14. 10 CFR Part 50 Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants

15. 10 CFR Part 61, Licensing Requirements for Land Disposal and Radioactive Waste

16. NRC REG Guide 4.15 and NRC REG Guide 4.8 119

TABLE 1 2020 RADIOLOGICAL PROFICIENCY TESTING RESULTS AND ACCEPTANCE CRITERIA Report Closing /

PT Quarter / Received Sample Sample Reported Assigned Acceptance Performance Provider Year Date Number Media Units Analyte Value Value Limits Evaluation ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Barium-133 59.2 64.5 53.7 - 71.0 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Cesium-134 21.5 22.9 17.5 - 25.6 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Cesium-137 217 220 198 - 244 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Cobalt-60 97.7 91.2 82.1 - 103 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Zinc-65 332 298 268 - 348 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Gross Alpha 67.1 58.9 30.8 - 73.3 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Gross Alpha 55.4 58.9 30.8 - 73.3 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Gross Beta 20 21 12.6 - 29.1 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Radium-226 15.6 17.4 12.9 - 19.9 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Radium-228 5.71 7.95 5.06 - 10.1 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Radium-228 5.68 7.95 5.06 - 10.1 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Uranium (Nat) 64.8 68.2 55.7 - 75.0 Acceptable Not ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Tritium 15200 17800 15600 - 19600 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Tritium 17700 17800 15600 - 19600 Acceptable Not ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Strontium-89 73.3 59.3 47.6 - 67.1 Acceptable Not ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Strontium-89 70.8 59.3 47.6 - 67.1 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Strontium-90 38.3 36.5 26.8 - 42.1 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Strontium-90 30.6 36.5 26.8 - 42.1 Acceptable Not ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Iodine-131 23.7* 29.9 24.9 - 34.9 Acceptable ERA 1st/2020 2/24/20 RAD-120 Water pCi/L Iodine-131 31.8 29.9 24.9 - 34.9 Acceptable EZA 1st/2020 05/08/20 E13167 Cartridge pCi Iodine-131 9.37E+01 9.12E+01 1.03 Acceptable EZA 1st/2020 05/08/20 E13168 Milk pCi/L Strontium-89 9.15E+01 9.55E+01 0.96 Acceptable EZA 1st/2020 05/08/20 E13168 Milk pCi/L Strontium-90 1.51E+02 1.43E+02 0.62 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cerium-141 1.99E+02 1.84E+02 1.08 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cobalt-58 1.96E+02 1.89E+02 1.03 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cobalt-60 2.33E+02 2.29E+02 1.02 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Chromium-51 3.84E+02 3.76E+02 1.02 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cesium-134 1.36E+02 1.49E+02 0.91 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cesium-137 1.91E+02 1.80E+02 1.06 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Manganese-54 2.31E+02 2.10E+02 1.1 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Iron-59 1.82E+02 1.63E+02 1.12 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Zinc-65 2.69E+02 2.52E+02 1.07 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cerium-141 2.11E+02 1.90E+02 1.11 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cesium-134 1.53E+02 1.54E+02 0.99 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cesium-137 2.08E+02 1.85E+02 1.12 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Chromium-51 4.34E+02 3.88E+02 1.12 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cobalt-58 2.21E+02 1.96E+02 1.13 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cobalt-60 2.59E+02 2.36E+02 1.10 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Iodine-131 1.02E+02 9.29E+01 1.1 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Iron-59 1.79E+02 1.68E+02 1.06 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Manganese-54 2.48E+02 2.16E+02 1.15 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Zinc-65 3.05E+02 2.61E+02 1.17 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Actinium-228 3200 3170 2090 - 3990 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Actinium-228 3200 3170 2090 - 3990 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Americium-241 1410 1730 934 - 2450 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Bismuth-212 3160 3280 939 - 4890 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Bismuth-212 3160 3280 939 - 4890 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Bismuth-214 1870 2270 1090 - 3380 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Bismuth-214 1870 2270 1090 - 3380 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Cesium-134 5040 6200 4240 - 7410 Acceptable 120

ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Cesium-134 5040 6200 4240 - 7410 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Cesium-137 6830 7280 5510 - 9210 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Cesium-137 6830 7280 5510 - 9210 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Cobalt-60 4840 5170 4070 - 6380 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Cobalt-60 4840 5170 4070 - 6380 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Lead-212 3580 3280 2290 - 4150 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Lead-212 3580 3280 2290 - 4150 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Lead-214 2380 2330 979 - 3660 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Lead-214 2380 2330 979 - 3660 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Manganese-54 <25.4 <1000 <1000 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Manganese-54 <25.4 <1000 <1000 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Plutonium-238 951 1010 504 - 1540 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Plutonium-239 1020 1240 676 - 1780 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Potassium-40 26000 24700 17000 - 29500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Potassium-40 26000 24700 17000 - 29500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Strontium-90 1980 2550 794 - 3970 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Strontium-90 1980 2550 794 - 3970 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Strontium-90 1980 2550 794 - 3970 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Thorium-234 5090 4010 1510 - 6870 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Thorium-234 5090 4010 1510 - 6870 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Uranium-234 3330 3600 1690 - 4720 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Uranium-234 3910 3600 1690 - 4720 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Uranium-238 3490 3570 1960 - 4790 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Uranium-238 2950 3570 1960 - 4790 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Uranium-Total 6980 7340 4070 - 9490 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Uranium-Total 6995 7340 4070 - 9490 Acceptable Uranium-Total ERA 2nd/2020 05/19/20 MRAD-32 Soil µg/kg (mass) 10500 10700 4830 - 14400 Acceptable Uranium-Total ERA 2nd/2020 05/19/20 MRAD-32 Soil µg/kg (mass) 8830 10700 4830 - 14400 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Zinc-65 1070 1100 879 - 1500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Soil pCi/kg Zinc-65 1070 1100 879 - 1500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Americium-241 3470 3950 2440 - 5580 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Cesium-134 1780 2150 1430 - 2860 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Cesium-134 1780 2150 1430 - 2860 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Cesium-137 942 1030 792 - 1390 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Cesium-137 942 1030 792 - 1390 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Cobalt-60 987 997 783 - 1300 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Cobalt-60 987 997 783 - 1300 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Curium-244 881 1050 592 - 1310 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Manganese-54 <39.6 <300 <300 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Manganese-54 <39.6 <300 <300 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Plutonium-238 1070 1150 796 - 1480 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Plutonium-239 227 232 160 - 294 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Potassium-40 35700 39300 29500 - 49800 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Potassium-40 35700 39300 29500 - 49800 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Strontium-90 1720 1720 970 - 2240 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Strontium-90 1720 1720 970 - 2240 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Strontium-90 1720 1720 970 - 2240 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Uranium-234 1750 1900 1330 - 2420 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Uranium-238 1780 1880 1330 - 2350 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Uranium-Total 3620 3870 2470 - 5220 Acceptable Uranium-Total ERA 2nd/2020 05/19/20 MRAD-32 Vegetation µg/kg (mass) 5330 5640 4330 - 6990 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Zinc-65 2740 2750 2050 - 4080 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Vegetation pCi/kg Zinc-65 2740 2750 2050 - 4080 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Americium-241 64.9 74.7 53.3 - 99.6 Acceptable 121

ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Cesium-134 1360 1390 902 - 1700 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Cesium-134 1360 1390 902 - 1700 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Cesium-137 370 351 288 - 460 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Cesium-137 370 351 288 - 460 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Cobalt-60 459 422 359 - 536 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Cobalt-60 459 422 359 - 536 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Iron-55 1150 1260 460 - 2010 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Manganese-54 <3.87 <50.0 <50.0 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Manganese-54 <3.87 <50.0 <50.0 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Plutonium-238 21.9 28 21.1 - 34.4 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Plutonium-239 30.6 40.1 30.0 - 48.4 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Strontium-90 181 175 111 - 238 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Uranium-234 45.7 56.2 41.7 - 65.9 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Uranium-234 46.7 56.2 41.7 - 65.9 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Uranium-238 46 55.7 42.1 - 66.5 Acceptable Not ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Uranium-238 39.6 55.7 42.1 - 66.5 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Uranium-Total 94.5 114 83.2 - 135 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Uranium-Total 88.1 114 83.2 - 135 Acceptable Uranium-Total ERA 2nd/2020 05/19/20 MRAD-32 Air Filter µg/Filter (mass) 138 167 134 - 196 Acceptable Uranium-Total Not ERA 2nd/2020 05/19/20 MRAD-32 Air Filter µg/Filter (mass) 118 167 134 - 196 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Zinc-65 798 694 569 - 1060 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Zinc-65 798 694 569 - 1060 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Gross Alpha 34.4 29.3 15.3 - 48.3 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Air Filter pCi/Filter Gross Beta 61.1 66.4 40.3 - 100 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Americium-241 47.9 45.3 31.1 - 57.9 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cesium-134 1420 1520 1150 - 1670 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cesium-134 1420 1520 1150 - 1670 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cesium-134 1420 1520 1150 - 1670 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cesium-137 2440 2390 2050 - 2720 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cesium-137 2440 2390 2050 - 2720 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cesium-137 2440 2390 2050 - 2720 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cobalt-60 2890 2760 2380 - 3170 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cobalt-60 2890 2760 2380 - 3170 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Cobalt-60 2890 2760 2380 - 3170 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Iron-55 140 152 89.3 - 221 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Manganese-54 <6.25 <100 <100 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Manganese-54 <6.25 <100 <100 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Manganese-54 <6.25 <100 <100 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Plutonium-238 32.5 36.4 21.9 - 47.2 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Plutonium-239 29.7 33.6 20.8 - 41.4 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Strontium-90 426 447 322 - 552 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Uranium-234 187 186 142 - 213 Acceptable Not ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Uranium-234 226* 186 142 - 213 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Uranium-238 191 184 143 - 217 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Uranium-238 199 184 143 - 217 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Uranium-Total 387 378 295 - 431 Acceptable Not ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Uranium-Total 434.3* 378 295 - 431 Acceptable Uranium-Total ERA 2nd/2020 05/19/20 MRAD-32 Water µg/L (mass) 572 551 446 - 625 Acceptable Uranium-Total ERA 2nd/2020 05/19/20 MRAD-32 Water µg/L (mass) 595 551 446 - 625 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Zinc-65 1330 1190 1060 - 1500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Zinc-65 1330 1190 1060 - 1500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Zinc-65 1330 1190 1060 - 1500 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Gross Alpha 67.6 165 60.2 - 228 Acceptable 122

ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Gross Alpha 67.6 165 60.2 - 228 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Gross Beta 143 158 79.0 - 217 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Gross Beta 143 158 79.0 - 217 Acceptable ERA 2nd/2020 05/19/20 MRAD-32 Water pCi/L Tritium 5990 6280 4730 - 7640 Acceptable ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Tritium 13100 14100 12300 - 15500 Acceptable Not ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Strontium-89 68.8 60.1 48.3 - 67.9 Acceptable Not ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Strontium-89 71.6 60.1 48.3 - 67.9 Acceptable ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Iodine-131 27.5 28.9 24.1 - 33.8 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 GrF42 Filter Bq/sample Gross alpha 0.79 1.24 0.37-2.11 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 GrF42 Filter Bq/sample Gross beta 1.84 2.00 1.00-3.00 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 GrW42 Water Bq/L Gross alpha 1.01 1.03 0.31-1.75 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 GrW42 Water Bq/L Gross beta 4.18 4.24 2.12-6.36 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Americium-241 43.0 40.9 28.6-53.2 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Cesium-134 984 1114 780-1448 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Cesium-137 1060 1020 714-1326 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Cobalt-57 1200.000 1071 750-1392 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Cobalt-60 0.366 False Pos Test Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Iron-55 950.0 1096 767-1425 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Manganese-54 961 945 662-1229 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Nickel-63 -0.727 False Pos Test Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Plutonium-238 38.0 41.8 29.3-54.3 Acceptable MAPEP Plutonium-MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg 239/240 38.0 41.8 29.3-54.3 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Potassium-40 618 625 438-813 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Strontium-90 286 340 238-442 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Technetium-99 728 706 494-918 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg U-234/233 43.2 40.3 28.2-52.4 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Uranium-238 64.6 68.0 48-88 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaS42 Soil Bq/Kg Zinc-65 784 751 526-976 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Americium-241 0.545 0.547 0.383-0.711 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Cesium-134 17.0 18.5 13.0-24.1 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Cesium-137 12.0 11.3 7.9-14.7 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Cobalt-57 19.7 19.7 13.8-25.6 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Cobalt-60 11.0 10.6 7.4-13.8 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Hydrogen-3 193 196 137-255 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Iron-55 18.2 17.8 12.5-23.1 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Manganese-54 20.6 19.6 13.7-25.5 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Nickel-63 14.1 11.1 7.8-14.4 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Plutonium-238 0.822 0.940 0.66-1.22 Acceptable MAPEP Plutonium-MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L 239/240 0.686 0.737 0.516-0.958 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Potassium-40 -0.0485 False Pos Test Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Radium-226 0.366 0.365 0.256-0.475 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Strontium-90 0.0122 False Pos Test Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Technetium-99 3.72 3.63 2.54-4.72 Acceptable 123

MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Uranium-234 1.02 0.97 0.68-1.26 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Uranium-238 0.98 0.95 0.67-1.24 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 MaW42 Water Bq/L Zinc-65 23.9 22.2 15.5-28.9 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 XaW42 Alk. Water Bq/L Iodine-129 1.01 1.001 0.701-1.301 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter ug/sample Uranium-235 0.0438 0.0460 0.0322-0.0598 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter ug/sample Uranium-238 6.39 6.3 4.4-8.2 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter ug/sample Uranium-Total 6.43 6.3 4.4-8.2 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Americium-241 0.0671 0.0675 0.0473-0.0878 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Cesium-134 0.626 0.600 0.420-0.780 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Cesium-137 0.802 0.735 0.515-0.956 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Cobalt-57 1.54 1.50 1.05-1.95 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Cobalt-60 1.29 1.23 0.86-1.60 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Manganese-54 0.0065 False Pos Test Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Plutonium-238 0.0341 0.0348 0.0244-0.0452 Acceptable MAPEP Plutonium-MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample 239/240 0.0395 0.0379 0.0265-0.0493 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Strontium-90 0.884 0.97 0.68-1.26 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Uranium-234 0.0788 0.075 0.053-0.098 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Uranium-238 0.0801 0.078 0.055-0.101 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdF42 Filter Bq/sample Zinc-65 1.43 1.18 0.83-1.53 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Americium-241 0.0761 0.075 0.053-0.098 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Cesium-134 3.55 3.82 2.67-4.97 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Cesium-137 2.83 2.77 1.94-3.60 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Cobalt-57 0.00561 False Pos Test Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Cobalt-60 2.84 2.79 1.95-3.63 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Manganese-54 4.74 4.58 3.21-5.95 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Plutonium-238 0.0447 0.0472 0.0330-0.0614 Acceptable MAPEP Plutonium-MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample 239/240 0.06950 0.0772 0.0540-0.1004 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Strontium-90 0.361 0.492 0.344-0.640 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Uranium-234 0.1070 0.102 0.071-0.133 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Uranium-238 0.1150 0.103 0.072-0.134 Acceptable MAPEP MAPEP 2nd/2020 07/02/20 RdV42 Vegetation Bq/sample Zinc-65 4.14 3.79 2.65-4.93 Acceptable EZA 2nd/2020 07/31/20 E13171 Cartridge pCi Iodine-131 9.68E+01 9.19E+01 1.05 Acceptable EZA 2nd/2020 07/31/20 E13172 Milk pCi/L Strontium-89 8.67E+01 8.81E+01 0.98 Acceptable EZA 2nd/2020 07/31/20 E13172 Milk pCi/L Strontium-90 1.06E+01 1.27E+01 0.83 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cerium-141 1.29E+02 1.16E+02 1.11 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cobalt-58 1.04E+02 1.00E+02 1.03 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cobalt-60 2.00E+02 1.95E+02 1.02 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Chromium-51 2.91E+02 2.56E+02 1.14 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cesium-134 1.40E+02 1.46E+02 0.96 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cesium-137 1.09E+02 1.04E+02 1.05 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Iron-59 1.09E+02 1.01E+02 1.08 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Iodine-131 8.31E+01 8.15E+01 1.02 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Manganese-54 1.41E+02 1.34E+02 1.05 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Zinc-65 2.48E+02 2.25E+02 1.10 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cerium-141 1.23E+02 1.17E+02 1.05 Acceptable 124

EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cobalt-58 1.05E+02 1.02E+02 1.03 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cobalt-60 2.05E+02 1.98E+02 1.04 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Chromium-51 2.76E+02 2.59E+02 1.06 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cesium-134 1.36E+02 1.48E+02 0.92 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cesium-137 1.04E+02 1.05E+02 0.99 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Iron-59 1.05E+02 1.02E+02 1.03 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Iodine-131 9.10E+01 8.05E+01 1.13 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Manganese-54 1.47E+02 1.35E+02 1.09 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Zinc-65 2.49E+02 2.27E+02 1.10 Acceptable Not ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Barium-133 64.7 58.6 48.6 - 64.6 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Cesium-134 23 22.3 17.0 - 25.0 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Cesium-137 76.5 73 65.7 - 83.0 Acceptable Not ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Cobalt-60 97.9 86.1 77.5 - 97.0 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Zinc-65 96.3 82.9 74.6 - 99.6 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Gross Alpha 54.3 52.4 27.3 - 65.6 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Gross Beta 24.7 24.3 15.0 - 32.3 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Radium-226 9.42 10.8 8.08 - 12.5 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Radium-228 5.55 5.42 3.28 - 7.19 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Uranium (Nat) 28.9 29.3 23.7 - 32.5 Acceptable Uranium (Nat)

ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L mass 41.3 42.7 34.5 - 47.4 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Tritium 17800 20300 17800 - 22300 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water µg/L Tritium 20200 20300 17800 - 22300 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Strontium-89 61.7 68.9 56.2 - 77.1 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Strontium-90 18.2 19.5 13.9 - 23.1 Acceptable ERA 3rd /2020 08/24/20 RAD - 122 Water pCi/L Iodine-131 29.9 26.1 21.7 - 30.8 Acceptable EZA 3rd/2020 11/10/20 E13175 Cartridge pCi Iodine-131 7.96E+01 7.67E+01 1.04 Acceptable EZA 3rd/2020 11/10/20 E13176 Milk pCi/L Strontium-89 1.13E+02 9.54E+01 1.18 Acceptable EZA 3rd/2020 11/10/20 E13176 Milk pCi/L Strontium-90 9.47E+01 1.28E+02 0.74 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cerium-141 1.47E+02 1.50E+02 0.98 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cobalt-58 1.81E+02 1.80E+02 1.01 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cobalt-60 3.85E+02 3.79E+02 1.02 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Chromium-51 4.11E+02 3.72E+02 1.10 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cesium-134 1.82E+02 2.00E+02 0.91 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cesium-137 2.58E+02 2.50E+02 1.03 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Iron-59 2.29E+02 2.00E+02 1.14 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Iodine-131 9.49E+01 9.50E+01 1.00 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Manganese-54 1.96E+02 1.80E+02 1.09 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Zinc-65 3.04E+02 2.70E+02 1.13 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cerium-141 1.58E+02 1.51E+02 1.05 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cobalt-58 1.90E+02 1.80E+02 1.05 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cobalt-60 4.04E+02 3.80E+02 1.06 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Chromium-51 3.45E+02 3.73E+02 0.92 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cesium-134 1.81E+02 2.01E+02 0.9 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cesium-137 2.63E+02 2.51E+02 1.05 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Iron-59 2.26E+02 2.01E+02 1.12 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Iodine-131 9.80E+01 9.82E+01 1.00 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Manganese-54 2.06E+02 1.81E+02 1.14 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Zinc-65 3.02E+02 2.71E+02 1.12 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Actinium-228 3530 3290 2170 - 4150 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Americium-241 780 677 366 - 959 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Bismuth-212 3780 3290 942 - 4900 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Bismuth-214 2970 3790 1820 - 5640 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Cesium-134 3760 4180 2860 - 5000 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Cesium-137 6890 6940 5250 - 8780 Acceptable 125

ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Cobalt-60 2280 2520 1980 - 3110 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Lead-214 3680 4080 1710 - 6410 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Lead-214 3720 4080 1710 - 6410 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Manganese-54 <23.9 <1000 <1000 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Plutonium-238 1460 1670 833 - 2540 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Potassium-40 24600 24700 17000 - 29500 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Strontium-90 5110 4980 1550 - 7760 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Thorium-234 5370 4740 1790 - 8120 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Uranium-234 4550 4780 2240 - 6260 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Uranium-234 5100 4780 2240 - 6260 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Uranium-238 4800 4740 2600 - 6360 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Uranium-238 4870 4740 2600 - 6360 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Uranium-Total 9590 9730 5400 - 12600 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Uranium-Total 10189 9730 5400 - 12600 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Soil µg/kg (mass) 14400 14200 6410 - 19200 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Soil µg/kg (mass) 14600 14200 6410 - 19200 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Soil pCi/kg Zinc-65 1220 1120 895 - 1530 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Americium-241 2680 2940 1820 - 4150 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Cesium-134 862 945 627 - 1260 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Cesium-137 735 823 633 - 1110 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Cobalt-60 663 691 542 - 903 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Curium-244 3100 3400 1920 - 4230 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Manganese-54 <47.5 <300 <300 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Plutonium-238 4470 4590 3180 - 5920 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Plutonium-239 838 768 531 - 972 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Potassium-40 33500 34500 25900 - 43700 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Strontium-90 8790 8690 4900 - 11300 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Uranium-234 2650 2920 2050 - 3720 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Uranium-238 2720 2900 2050 - 3630 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Uranium-Total 5510 5950 3800 - 8020 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Vegetation µg/kg (mass) 8150 8680 6660 - 10800 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Vegetation pCi/kg Zinc-65 1640 1580 1180 - 2340 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Americium-241 22.3 22.2 15.8 - 29.6 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Cesium-134 268 296 192 - 363 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Cesium-137 407 413 339 - 542 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Cobalt-60 507 497 422 - 631 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Iron-55 361 407 149 - 649 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Manganese-54 <3.82 <50.0 <50.0 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Plutonium-238 25.3 28.8 21.7 - 35.4 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Plutonium-239 31 33.7 25.2 - 40.7 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Strontium-90 30.5 36.2 22.9 - 49.3 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Uranium-234 16.5 18.3 13.6 - 21.4 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Uranium-234 19.5 18.3 13.6 - 21.4 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Uranium-238 18.5 18.1 13.7 - 21.6 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Uranium-238 18.2 18.1 13.7 - 21.6 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Uranium-Total 35.8 37.2 27.2 - 44.1 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Air Filter µg/Filter (mass) 55.3 54.3 43.6 - 63.6 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Air Filter µg/Filter (mass) 54.4 54.3 43.6 - 63.6 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Zinc-65 540 500 410 - 764 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Gross Alpha 32.2 26.1 13.6 - 43.0 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Air Filter pCi/Filter Gross Beta 94.2 85.9 52.1 - 130 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Americium-241 185 176 121 - 225 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Cesium-134 849 911 688 - 1000 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Cesium-137 1540 1510 1290 - 1720 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Cobalt-60 1660 1560 1350 - 1790 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Iron-55 267 298 175 - 433 Acceptable 126

ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Manganese-54 <4.61 <100 <100 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Plutonium-238 160 191 115 - 247 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Plutonium-239 81.7 100 61.9 - 123 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Strontium-90 917 787 567 - 973 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-234 33.8 35.2 26.8 - 40.3 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-234 39.2 35.2 26.8 - 40.3 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-238 34.7 34.9 27.0 - 41.1 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-238 32.7 34.9 27.0 - 41.1 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-238 37.3 34.9 27.0 - 41.1 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-Total 70.4 71.8 56.0 - 81.9 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Uranium-Total 78.2 71.8 56.0 - 81.9 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Water µg/L (mass) 104 105 85.0 - 119 Acceptable Uranium-Total ERA 4th/2020 11/16/20 MRAD-33 Water µg/L (mass) 112 105 85.0 - 119 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Zinc-65 1010 917 816 - 1160 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Gross Alpha 100 111 40.5 - 153 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Gross Beta 181 194 97.0 - 267 Acceptable ERA 4th/2020 11/16/20 MRAD-33 Water pCi/L Tritium 11600 12000 9040 - 14600 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Americium-241 1.2 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Cesium-134 625 710 497-923 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Cesium-137 0.87 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Cobalt-57 1260 1100 770-1430 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Cobalt-60 998 1000 700-1300 Acceptable MAPEP Not MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Iron-55 811 577 404-750 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Manganese-54 661 610 427-793 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Nickel-63 840 980 686-1274 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Plutonium-238 53.1 57.7 40.4-75 Acceptable MAPEP Plutonium-MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg 239/240 68.1 79.0 55-103 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Potassium-40 704 622 435-809 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Strontium-90 434 487 341-633 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Technetium-99 5 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg U-234/233 51 48 33.7-62.5 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Uranium-238 126 128 90-166 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaS43 Soil Bq/Kg Zinc-65 531 470 329-611 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Americium-241 0.942 0.922 0.645-1.199 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Cesium-134 13.9 15.2 10.6-19.8 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Cesium-137 15.10 14.3 10.0-18.6 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Cobalt-57 -0.0072 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Cobalt-60 12.90 12.2 8.5-15.9 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Hydrogen-3 330 360 252-468 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Iron-55 29.20 32.9 23.0-42.8 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Manganese-54 -0.0032 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Nickel-63 -0.93 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Plutonium-238 0.6430 0.7040 0.493-0.915 Acceptable MAPEP Plutonium- Sens.

MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L 239/240 0.001 0.009 Evaluation Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Potassium-40 -0.763 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Radium-226 1.020 1.250 0.88-1.63 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Strontium-90 9.97 11.60 8.1-15.1 Acceptable 127

MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Technetium-99 8.720 9.40 6.6-12.2 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Uranium-234/233 1.27 1.26 0.88-1.64 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Uranium-238 1.31 1.30 0.9-1.7 Acceptable MAPEP MAPEP 4th/2020 12/14/20 MaW43 Water Bq/L Zinc-65 18.9 16.9 11.8-22 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter ug/sample Uranium-235 0.0920 0.1020 0.071-0.133 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter ug/sample Uranium-238 13.1 14.6 10.2-19 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter ug/sample Uranium-Total 13.2 14.7 10.3-19.1 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Americium-241 0.129 0.134 0.094-0.174 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Cesium-134 1.72 1.83 1.28-2.38 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Cesium-137 1.04 0.996 0.697-1.295 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Cobalt-57 0.00126 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Cobalt-60 1.85 1.73 1.21-2.25 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Manganese-54 1.64 1.40 0.98-1.82 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Plutonium-238 0.0917 0.0867 0.0607-0.1127 Acceptable MAPEP Plutonium- Sens.

MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample 239/240 0.0019 0.0017 Evaluation Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Strontium-90 1.790 2.080 1.46-2.70 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Uranium-234/233 0.1820 0.175 0.123-0.228 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Uranium-238 0.1860 0.182 0.127-0.237 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdF43 Filter Bq/sample Zinc-65 2.29 2.00 1.40-2.60 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Americium-241 0.1040 0.103 0.072-0.134 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Cesium-134 4.5 4.94 3.46-6.42 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Cesium-137 0.0134 False Pos Test Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Cobalt-57 6.70 6.67 4.67-8.67 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Cobalt-60 4.27 4.13 2.89-5.37 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Manganese-54 6.04 5.84 4.09-7.59 Acceptable MAPEP Sens.

MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Plutonium-238 0.0002 0.001 Evaluation Acceptable MAPEP Plutonium-MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample 239/240 0.05370 0.0624 0.0437-0.0811 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Strontium-90 1.07 1.39 0.97-1.81 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Uranium-234/233 0.1270 0.1150 0.081-0.150 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Uranium-238 0.1260 0.1200 0.084-0.156 Acceptable MAPEP MAPEP 4th/2020 12/14/20 RdV43 Vegetation Bq/sample Zinc-65 7.04 6.38 4.47-8.29 Acceptable EZA 4th/2020 2/1/2021 E13179 Cartridge pCi Iodine-131 7.58E+01 7.81E+01 0.97 Acceptable EZA 4th/2020 2/1/2021 E13180 Milk pCi/L Strontium-89 8.41E+01 8.97E+01 0.94 Acceptable EZA 4th/2020 2/1/2021 E13180 Milk pCi/L Strontium-90 1.13E+01 1.30E+01 0.87 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cerium-141 9.76E+01 1.00E+01 0.98 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cobalt-58 8.58E+01 8.43E+01 1.02 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cobalt-60 1.66E+02 1.52E+02 1.09 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Chromium-51 2.68E+02 2.53E+02 1.06 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cesium-134 1.03E+02 1.08E+02 0.96 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cesium-137 1.33E+02 1.27E+02 1.04 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Iron-59 1.28E+02 1.12E+02 1.14 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Iodine-131 9.44E+01 9.19E+01 1.08 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Manganese-54 1.49E+02 1.43E+02 1.04 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Zinc-65 2.17E+02 1.90E+02 1.14 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cerium-141 1.18E+02 1.06E+02 1.11 Acceptable 128

EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cobalt-58 9.54E+01 8.92E+01 1.07 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cobalt-60 1.74E+02 1.61E+02 1.08 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Chromium-51 3.05E+02 2.68E+02 1.14 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cesium-134 1.14E+02 1.14E+02 1.00 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cesium-137 1.37E+02 1.35E+02 1.02 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Iron-59 1.37E+02 1.19E+02 1.16 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Iodine-131 9.72E+01 9.57E+01 1.02 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Manganese-54 1.65E+02 1.51E+02 1.09 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Zinc-65 2.29E+02 2.01E+02 1.14 Acceptable 129

TABLE 2 2020 ECKERT & ZIEGLER ANALYTICS PERFORMANCE EVALUATION RESULTS Report Acceptance PT Quarter / Received Sample Sample Analyte / GEL Known Range/

Provider Year Date Number Media Unit Nuclide Value value Ratio Evaluation EZA 1st/2020 05/08/20 E13167 Cartridge pCi Iodine-131 9.37E+01 9.12E+01 1.03 Acceptable EZA 1st/2020 05/08/20 E13168 Milk pCi/L Strontium-89 9.15E+01 9.55E+01 0.96 Acceptable EZA 1st/2020 05/08/20 E13168 Milk pCi/L Strontium-90 1.51E+02 1.43E+02 0.62 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cerium-141 1.99E+02 1.84E+02 1.08 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cobalt-58 1.96E+02 1.89E+02 1.03 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cobalt-60 2.33E+02 2.29E+02 1.02 Acceptable Chromium-EZA 1st/2020 05/08/20 E13169 Milk pCi/L 51 3.84E+02 3.76E+02 1.02 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cesium-134 1.36E+02 1.49E+02 0.91 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Cesium-137 1.91E+02 1.80E+02 1.06 Acceptable Manganese-EZA 1st/2020 05/08/20 E13169 Milk pCi/L 54 2.31E+02 2.10E+02 1.1 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Iron-59 1.82E+02 1.63E+02 1.12 Acceptable EZA 1st/2020 05/08/20 E13169 Milk pCi/L Zinc-65 2.69E+02 2.52E+02 1.07 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cerium-141 2.11E+02 1.90E+02 1.11 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cesium-134 1.53E+02 1.54E+02 0.99 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cesium-137 2.08E+02 1.85E+02 1.12 Acceptable Chromium-EZA 1st/2020 05/08/20 E13170 Water pCi/L 51 4.34E+02 3.88E+02 1.12 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cobalt-58 2.21E+02 1.96E+02 1.13 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Cobalt-60 2.59E+02 2.36E+02 1.10 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Iodine-131 1.02E+02 9.29E+01 1.1 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Iron-59 1.79E+02 1.68E+02 1.06 Acceptable Manganese-EZA 1st/2020 05/08/20 E13170 Water pCi/L 54 2.48E+02 2.16E+02 1.15 Acceptable EZA 1st/2020 05/08/20 E13170 Water pCi/L Zinc-65 3.05E+02 2.61E+02 1.17 Acceptable EZA 2nd/2020 07/31/20 E13171 Cartridge pCi Iodine-131 9.68E+01 9.19E+01 1.05 Acceptable EZA 2nd/2020 07/31/20 E13172 Milk pCi/L Strontium-89 8.67E+01 8.81E+01 0.98 Acceptable EZA 2nd/2020 07/31/20 E13172 Milk pCi/L Strontium-90 1.06E+01 1.27E+01 0.83 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cerium-141 1.29E+02 1.16E+02 1.11 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cobalt-58 1.04E+02 1.00E+02 1.03 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cobalt-60 2.00E+02 1.95E+02 1.02 Acceptable Chromium-EZA 2nd/2020 07/31/20 E13173 Milk pCi/L 51 2.91E+02 2.56E+02 1.14 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cesium-134 1.40E+02 1.46E+02 0.96 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Cesium-137 1.09E+02 1.04E+02 1.05 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Iron-59 1.09E+02 1.01E+02 1.08 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Iodine-131 8.31E+01 8.15E+01 1.02 Acceptable Manganese-EZA 2nd/2020 07/31/20 E13173 Milk pCi/L 54 1.41E+02 1.34E+02 1.05 Acceptable EZA 2nd/2020 07/31/20 E13173 Milk pCi/L Zinc-65 2.48E+02 2.25E+02 1.10 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cerium-141 1.23E+02 1.17E+02 1.05 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cobalt-58 1.05E+02 1.02E+02 1.03 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cobalt-60 2.05E+02 1.98E+02 1.04 Acceptable Chromium-EZA 2nd/2020 07/31/20 E13174 Water pCi/L 51 2.76E+02 2.59E+02 1.06 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cesium-134 1.36E+02 1.48E+02 0.92 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Cesium-137 1.04E+02 1.05E+02 0.99 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Iron-59 1.05E+02 1.02E+02 1.03 Acceptable EZA 2nd/2020 07/31/20 E13174 Water pCi/L Iodine-131 9.10E+01 8.05E+01 1.13 Acceptable Manganese-EZA 2nd/2020 07/31/20 E13174 Water pCi/L 54 1.47E+02 1.35E+02 1.09 Acceptable 130

EZA 2nd/2020 07/31/20 E13174 Water pCi/L Zinc-65 2.49E+02 2.27E+02 1.10 Acceptable EZA 3rd/2020 11/10/20 E13175 Cartridge pCi Iodine-131 7.96E+01 7.67E+01 1.04 Acceptable EZA 3rd/2020 11/10/20 E13176 Milk pCi/L Strontium-89 1.13E+02 9.54E+01 1.18 Acceptable EZA 3rd/2020 11/10/20 E13176 Milk pCi/L Strontium-90 9.47E+01 1.28E+02 0.74 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cerium-141 1.47E+02 1.50E+02 0.98 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cobalt-58 1.81E+02 1.80E+02 1.01 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cobalt-60 3.85E+02 3.79E+02 1.02 Acceptable Chromium-EZA 3rd/2020 11/10/20 E13177 Milk pCi/L 51 4.11E+02 3.72E+02 1.10 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cesium-134 1.82E+02 2.00E+02 0.91 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Cesium-137 2.58E+02 2.50E+02 1.03 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Iron-59 2.29E+02 2.00E+02 1.14 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Iodine-131 9.49E+01 9.50E+01 1.00 Acceptable Manganese-EZA 3rd/2020 11/10/20 E13177 Milk pCi/L 54 1.96E+02 1.80E+02 1.09 Acceptable EZA 3rd/2020 11/10/20 E13177 Milk pCi/L Zinc-65 3.04E+02 2.70E+02 1.13 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cerium-141 1.58E+02 1.51E+02 1.05 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cobalt-58 1.90E+02 1.80E+02 1.05 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cobalt-60 4.04E+02 3.80E+02 1.06 Acceptable Chromium-EZA 3rd/2020 11/10/20 E13178 Water pCi/L 51 3.45E+02 3.73E+02 0.92 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cesium-134 1.81E+02 2.01E+02 0.9 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Cesium-137 2.63E+02 2.51E+02 1.05 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Iron-59 2.26E+02 2.01E+02 1.12 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Iodine-131 9.80E+01 9.82E+01 1.00 Acceptable Manganese-EZA 3rd/2020 11/10/20 E13178 Water pCi/L 54 2.06E+02 1.81E+02 1.14 Acceptable EZA 3rd/2020 11/10/20 E13178 Water pCi/L Zinc-65 3.02E+02 2.71E+02 1.12 Acceptable EZA 4th/2020 2/1/2021 E13179 Cartridge pCi Iodine-131 7.58E+01 7.81E+01 0.97 Acceptable EZA 4th/2020 2/1/2021 E13180 Milk pCi/L Strontium-89 8.41E+01 8.97E+01 0.94 Acceptable EZA 4th/2020 2/1/2021 E13180 Milk pCi/L Strontium-90 1.13E+01 1.30E+01 0.87 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cerium-141 9.76E+01 1.00E+01 0.98 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cobalt-58 8.58E+01 8.43E+01 1.02 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cobalt-60 1.66E+02 1.52E+02 1.09 Acceptable Chromium-EZA 4th/2020 2/1/2021 E13181 Milk pCi/L 51 2.68E+02 2.53E+02 1.06 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cesium-134 1.03E+02 1.08E+02 0.96 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Cesium-137 1.33E+02 1.27E+02 1.04 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Iron-59 1.28E+02 1.12E+02 1.14 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Iodine-131 9.44E+01 9.19E+01 1.08 Acceptable Manganese-EZA 4th/2020 2/1/2021 E13181 Milk pCi/L 54 1.49E+02 1.43E+02 1.04 Acceptable EZA 4th/2020 2/1/2021 E13181 Milk pCi/L Zinc-65 2.17E+02 1.90E+02 1.14 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cerium-141 1.18E+02 1.06E+02 1.11 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cobalt-58 9.54E+01 8.92E+01 1.07 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cobalt-60 1.74E+02 1.61E+02 1.08 Acceptable Chromium-EZA 4th/2020 2/1/2021 E13182 Water pCi/L 51 3.05E+02 2.68E+02 1.14 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cesium-134 1.14E+02 1.14E+02 1.00 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Cesium-137 1.37E+02 1.35E+02 1.02 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Iron-59 1.37E+02 1.19E+02 1.16 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Iodine-131 9.72E+01 9.57E+01 1.02 Acceptable Manganese-EZA 4th/2020 2/1/2021 E13182 Water pCi/L 54 1.65E+02 1.51E+02 1.09 Acceptable EZA 4th/2020 2/1/2021 E13182 Water pCi/L Zinc-65 2.29E+02 2.01E+02 1.14 Acceptable 131

TABLE 3 2020 DEPARTMENT OF ENERGY MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP) RESULTS Report PT Quarter / Received Sample Analyte / GEL Known Acceptance Provider Year Date Sample Number Media Unit Nuclide Value value Range/ Ratio Evaluation MAPEP 2nd/2020 07/02/20 MAPEP-20-GrF42 Filter Bq/sample Gross alpha 0.79 1.24 0.37-2.11 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-GrF42 Filter Bq/sample Gross beta 1.84 2.00 1.00-3.00 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-GrW42 Water Bq/L Gross alpha 1.01 1.03 0.31-1.75 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-GrW42 Water Bq/L Gross beta 4.18 4.24 2.12-6.36 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Americium-241 43.0 40.9 28.6-53.2 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Cesium-134 984 1114 780-1448 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Cesium-137 1060 1020 714-1326 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Cobalt-57 1200.000 1071 750-1392 Acceptable False Pos MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Cobalt-60 0.366 Test Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Iron-55 950.0 1096 767-1425 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Manganese-54 961 945 662-1229 Acceptable False Pos MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Nickel-63 -0.727 Test Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Plutonium-238 38.0 41.8 29.3-54.3 Acceptable Plutonium-MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg 239/240 38.0 41.8 29.3-54.3 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Potassium-40 618 625 438-813 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Strontium-90 286 340 238-442 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Technetium-99 728 706 494-918 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg U-234/233 43.2 40.3 28.2-52.4 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Uranium-238 64.6 68.0 48-88 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaS42 Soil Bq/Kg Zinc-65 784 751 526-976 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Americium-241 0.545 0.547 0.383-0.711 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Cesium-134 17.0 18.5 13.0-24.1 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Cesium-137 12.0 11.3 7.9-14.7 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Cobalt-57 19.7 19.7 13.8-25.6 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Cobalt-60 11.0 10.6 7.4-13.8 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Hydrogen-3 193 196 137-255 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Iron-55 18.2 17.8 12.5-23.1 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Manganese-54 20.6 19.6 13.7-25.5 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Nickel-63 14.1 11.1 7.8-14.4 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Plutonium-238 0.822 0.940 0.66-1.22 Acceptable Plutonium-MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L 239/240 0.686 0.737 0.516-0.958 Acceptable False Pos MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Potassium-40 -0.0485 Test Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Radium-226 0.366 0.365 0.256-0.475 Acceptable False Pos MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Strontium-90 0.0122 Test Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Technetium-99 3.72 3.63 2.54-4.72 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Uranium-234 1.02 0.97 0.68-1.26 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Uranium-238 0.98 0.95 0.67-1.24 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-MaW42 Water Bq/L Zinc-65 23.9 22.2 15.5-28.9 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-XaW42 Alk. Water Bq/L Iodine-129 1.01 1.001 0.701-1.301 Acceptable 0.0322-MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter ug/sample Uranium-235 0.0438 0.0460 0.0598 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter ug/sample Uranium-238 6.39 6.3 4.4-8.2 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter ug/sample Uranium-Total 6.43 6.3 4.4-8.2 Acceptable 132

0.0473-MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Americium-241 0.0671 0.0675 0.0878 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Cesium-134 0.626 0.600 0.420-0.780 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Cesium-137 0.802 0.735 0.515-0.956 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Cobalt-57 1.54 1.50 1.05-1.95 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Cobalt-60 1.29 1.23 0.86-1.60 Acceptable False Pos MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Manganese-54 0.0065 Test Acceptable 0.0244-MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Plutonium-238 0.0341 0.0348 0.0452 Acceptable Plutonium- 0.0265-MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample 239/240 0.0395 0.0379 0.0493 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Strontium-90 0.884 0.97 0.68-1.26 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Uranium-234 0.0788 0.075 0.053-0.098 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Uranium-238 0.0801 0.078 0.055-0.101 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdF42 Filter Bq/sample Zinc-65 1.43 1.18 0.83-1.53 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Americium-241 0.0761 0.075 0.053-0.098 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Cesium-134 3.55 3.82 2.67-4.97 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Cesium-137 2.83 2.77 1.94-3.60 Acceptable False Pos MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Cobalt-57 0.00561 Test Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Cobalt-60 2.84 2.79 1.95-3.63 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Manganese-54 4.74 4.58 3.21-5.95 Acceptable 0.0330-MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Plutonium-238 0.0447 0.0472 0.0614 Acceptable Plutonium- 0.0540-MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample 239/240 0.06950 0.0772 0.1004 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Strontium-90 0.361 0.492 0.344-0.640 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Uranium-234 0.1070 0.102 0.071-0.133 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Uranium-238 0.1150 0.103 0.072-0.134 Acceptable MAPEP 2nd/2020 07/02/20 MAPEP-20-RdV42 Vegetation Bq/sample Zinc-65 4.14 3.79 2.65-4.93 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Americium-241 1.2 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Cesium-134 625 710 497-923 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Cesium-137 0.87 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Cobalt-57 1260 1100 770-1430 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Cobalt-60 998 1000 700-1300 Acceptable Not MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Iron-55 811 577 404-750 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Manganese-54 661 610 427-793 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Nickel-63 840 980 686-1274 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Plutonium-238 53.1 57.7 40.4-75 Acceptable Plutonium-MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg 239/240 68.1 79.0 55-103 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Potassium-40 704 622 435-809 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Strontium-90 434 487 341-633 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Technetium-99 5 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg U-234/233 51 48 33.7-62.5 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Uranium-238 126 128 90-166 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaS43 Soil Bq/Kg Zinc-65 531 470 329-611 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Americium-241 0.942 0.922 0.645-1.199 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Cesium-134 13.9 15.2 10.6-19.8 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Cesium-137 15.10 14.3 10.0-18.6 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Cobalt-57 -0.0072 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Cobalt-60 12.90 12.2 8.5-15.9 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Hydrogen-3 330 360 252-468 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Iron-55 29.20 32.9 23.0-42.8 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Manganese-54 -0.0032 Test Acceptable 133

False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Nickel-63 -0.93 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Plutonium-238 0.6430 0.7040 0.493-0.915 Acceptable Plutonium- Sens.

MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L 239/240 0.001 0.009 Evaluation Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Potassium-40 -0.763 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Radium-226 1.020 1.250 0.88-1.63 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Strontium-90 9.97 11.60 8.1-15.1 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Technetium-99 8.720 9.40 6.6-12.2 Acceptable Uranium-MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L 234/233 1.27 1.26 0.88-1.64 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Uranium-238 1.31 1.30 0.9-1.7 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-MaW43 Water Bq/L Zinc-65 18.9 16.9 11.8-22 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter ug/sample Uranium-235 0.0920 0.1020 0.071-0.133 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter ug/sample Uranium-238 13.1 14.6 10.2-19 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter ug/sample Uranium-Total 13.2 14.7 10.3-19.1 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Americium-241 0.129 0.134 0.094-0.174 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Cesium-134 1.72 1.83 1.28-2.38 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Cesium-137 1.04 0.996 0.697-1.295 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Cobalt-57 0.00126 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Cobalt-60 1.85 1.73 1.21-2.25 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Manganese-54 1.64 1.40 0.98-1.82 Acceptable 0.0607-MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Plutonium-238 0.0917 0.0867 0.1127 Acceptable Plutonium- Sens.

MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample 239/240 0.0019 0.0017 Evaluation Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Strontium-90 1.790 2.080 1.46-2.70 Acceptable Uranium-MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample 234/233 0.1820 0.175 0.123-0.228 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Uranium-238 0.1860 0.182 0.127-0.237 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdF43 Filter Bq/sample Zinc-65 2.29 2.00 1.40-2.60 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Americium-241 0.1040 0.103 0.072-0.134 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Cesium-134 4.5 4.94 3.46-6.42 Acceptable False Pos MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Cesium-137 0.0134 Test Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Cobalt-57 6.70 6.67 4.67-8.67 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Cobalt-60 4.27 4.13 2.89-5.37 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Manganese-54 6.04 5.84 4.09-7.59 Acceptable Sens.

MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Plutonium-238 0.0002 0.001 Evaluation Acceptable Plutonium- 0.0437-MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample 239/240 0.05370 0.0624 0.0811 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Strontium-90 1.07 1.39 0.97-1.81 Acceptable Uranium-MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample 234/233 0.1270 0.1150 0.081-0.150 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Uranium-238 0.1260 0.1200 0.084-0.156 Acceptable MAPEP 4th/2020 12/14/20 MAPEP-20-RdV43 Vegetation Bq/sample Zinc-65 7.04 6.38 4.47-8.29 Acceptable 134

TABLE 4 2020 ERA PROGRAM PERFORMANCE EVALUATION RESULTS Report PT Quarter / Received Sample Sample GEL Known Acceptance Provider Year Date Number Media Unit Analyte / Nuclide Value value Range Evaluation RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Barium-133 59.2 64.5 53.7 - 71.0 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Cesium-134 21.5 22.9 17.5 - 25.6 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Cesium-137 217 220 198 - 244 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Cobalt-60 97.7 91.2 82.1 - 103 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Zinc-65 332 298 268 - 348 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Gross Alpha 67.1 58.9 30.8 - 73.3 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Gross Alpha 55.4 58.9 30.8 - 73.3 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Gross Beta 20 21 12.6 - 29.1 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Radium-226 15.6 17.4 12.9 - 19.9 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Radium-228 5.71 7.95 5.06 - 10.1 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Radium-228 5.68 7.95 5.06 - 10.1 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Uranium (Nat) 64.8 68.2 55.7 - 75.0 Acceptable RAD- 15600 - Not ERA 1st/2020 2/24/20 120 Water pCi/L Tritium 15200 17800 19600 Acceptable RAD- 15600 -

ERA 1st/2020 2/24/20 120 Water pCi/L Tritium 17700 17800 19600 Acceptable RAD- Not ERA 1st/2020 2/24/20 120 Water pCi/L Strontium-89 73.3 59.3 47.6 - 67.1 Acceptable RAD- Not ERA 1st/2020 2/24/20 120 Water pCi/L Strontium-89 70.8 59.3 47.6 - 67.1 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Strontium-90 38.3 36.5 26.8 - 42.1 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Strontium-90 30.6 36.5 26.8 - 42.1 Acceptable RAD- Not ERA 1st/2020 2/24/20 120 Water pCi/L Iodine-131 23.7* 29.9 24.9 - 34.9 Acceptable RAD-ERA 1st/2020 2/24/20 120 Water pCi/L Iodine-131 31.8 29.9 24.9 - 34.9 Acceptable 12300 -

ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Tritium 13100 14100 15500 Acceptable Not ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Strontium-89 68.8 60.1 48.3 - 67.9 Acceptable Not ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Strontium-89 71.6 60.1 48.3 - 67.9 Acceptable ERA 2nd/2020 05/26/20 RAD-121 Water pCi/L Iodine-131 27.5 28.9 24.1 - 33.8 Acceptable RAD - Not ERA 3rd /2020 08/24/20 122 Water pCi/L Barium-133 64.7 58.6 48.6 - 64.6 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Cesium-134 23 22.3 17.0 - 25.0 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Cesium-137 76.5 73 65.7 - 83.0 Acceptable RAD - Not ERA 3rd /2020 08/24/20 122 Water pCi/L Cobalt-60 97.9 86.1 77.5 - 97.0 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Zinc-65 96.3 82.9 74.6 - 99.6 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Gross Alpha 54.3 52.4 27.3 - 65.6 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Gross Beta 24.7 24.3 15.0 - 32.3 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Radium-226 9.42 10.8 8.08 - 12.5 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Radium-228 5.55 5.42 3.28 - 7.19 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Uranium (Nat) 28.9 29.3 23.7 - 32.5 Acceptable 135

RAD - Uranium (Nat)

ERA 3rd /2020 08/24/20 122 Water pCi/L mass 41.3 42.7 34.5 - 47.4 Acceptable RAD - 17800 -

ERA 3rd /2020 08/24/20 122 Water pCi/L Tritium 17800 20300 22300 Acceptable RAD - 17800 -

ERA 3rd /2020 08/24/20 122 Water µg/L Tritium 20200 20300 22300 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Strontium-89 61.7 68.9 56.2 - 77.1 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Strontium-90 18.2 19.5 13.9 - 23.1 Acceptable RAD -

ERA 3rd /2020 08/24/20 122 Water pCi/L Iodine-131 29.9 26.1 21.7 - 30.8 Acceptable 136

TABLE 5 2020 ERA PROGRAM (MRAD) PERFORMANCE EVALUATION RESULTS Report Acceptance PT Quarter / Received Sample Sample GEL Known Range/

Provider Year Date Number Media Unit Analyte / Nuclide Value value Ratio Evaluation MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Actinium-228 3200 3170 2090 - 3990 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Actinium-228 3200 3170 2090 - 3990 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Americium-241 1410 1730 934 - 2450 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Bismuth-212 3160 3280 939 - 4890 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Bismuth-212 3160 3280 939 - 4890 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Bismuth-214 1870 2270 1090 - 3380 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Bismuth-214 1870 2270 1090 - 3380 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Cesium-134 5040 6200 4240 - 7410 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Cesium-134 5040 6200 4240 - 7410 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Cesium-137 6830 7280 5510 - 9210 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Cesium-137 6830 7280 5510 - 9210 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Cobalt-60 4840 5170 4070 - 6380 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Cobalt-60 4840 5170 4070 - 6380 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Lead-212 3580 3280 2290 - 4150 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Lead-212 3580 3280 2290 - 4150 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Lead-214 2380 2330 979 - 3660 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Lead-214 2380 2330 979 - 3660 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Manganese-54 <25.4 <1000 <1000 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Manganese-54 <25.4 <1000 <1000 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Plutonium-238 951 1010 504 - 1540 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Plutonium-239 1020 1240 676 - 1780 Acceptable MRAD- 17000 -

ERA 2nd/2020 05/19/20 32 Soil pCi/kg Potassium-40 26000 24700 29500 Acceptable MRAD- 17000 -

ERA 2nd/2020 05/19/20 32 Soil pCi/kg Potassium-40 26000 24700 29500 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Strontium-90 1980 2550 794 - 3970 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Strontium-90 1980 2550 794 - 3970 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Strontium-90 1980 2550 794 - 3970 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Thorium-234 5090 4010 1510 - 6870 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Thorium-234 5090 4010 1510 - 6870 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Uranium-234 3330 3600 1690 - 4720 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Uranium-234 3910 3600 1690 - 4720 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Uranium-238 3490 3570 1960 - 4790 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Uranium-238 2950 3570 1960 - 4790 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Uranium-Total 6980 7340 4070 - 9490 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Uranium-Total 6995 7340 4070 - 9490 Acceptable MRAD- Uranium-Total ERA 2nd/2020 05/19/20 32 Soil µg/kg (mass) 10500 10700 4830 - 14400 Acceptable 137

MRAD- Uranium-Total ERA 2nd/2020 05/19/20 32 Soil µg/kg (mass) 8830 10700 4830 - 14400 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Zinc-65 1070 1100 879 - 1500 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Soil pCi/kg Zinc-65 1070 1100 879 - 1500 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Americium-241 3470 3950 2440 - 5580 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Cesium-134 1780 2150 1430 - 2860 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Cesium-134 1780 2150 1430 - 2860 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Cesium-137 942 1030 792 - 1390 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Cesium-137 942 1030 792 - 1390 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Cobalt-60 987 997 783 - 1300 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Cobalt-60 987 997 783 - 1300 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Curium-244 881 1050 592 - 1310 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Manganese-54 <39.6 <300 <300 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Manganese-54 <39.6 <300 <300 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Plutonium-238 1070 1150 796 - 1480 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Plutonium-239 227 232 160 - 294 Acceptable MRAD- 29500 -

ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Potassium-40 35700 39300 49800 Acceptable MRAD- 29500 -

ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Potassium-40 35700 39300 49800 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Strontium-90 1720 1720 970 - 2240 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Strontium-90 1720 1720 970 - 2240 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Strontium-90 1720 1720 970 - 2240 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Uranium-234 1750 1900 1330 - 2420 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Uranium-238 1780 1880 1330 - 2350 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Uranium-Total 3620 3870 2470 - 5220 Acceptable MRAD- Uranium-Total ERA 2nd/2020 05/19/20 32 Vegetation µg/kg (mass) 5330 5640 4330 - 6990 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Zinc-65 2740 2750 2050 - 4080 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Vegetation pCi/kg Zinc-65 2740 2750 2050 - 4080 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Americium-241 64.9 74.7 53.3 - 99.6 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Cesium-134 1360 1390 902 - 1700 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Cesium-134 1360 1390 902 - 1700 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Cesium-137 370 351 288 - 460 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Cesium-137 370 351 288 - 460 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Cobalt-60 459 422 359 - 536 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Cobalt-60 459 422 359 - 536 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Iron-55 1150 1260 460 - 2010 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Manganese-54 <3.87 <50.0 <50.0 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Manganese-54 <3.87 <50.0 <50.0 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Plutonium-238 21.9 28 21.1 - 34.4 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Plutonium-239 30.6 40.1 30.0 - 48.4 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Strontium-90 181 175 111 - 238 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Uranium-234 45.7 56.2 41.7 - 65.9 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Uranium-234 46.7 56.2 41.7 - 65.9 Acceptable 138

MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Uranium-238 46 55.7 42.1 - 66.5 Acceptable MRAD- Not ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Uranium-238 39.6 55.7 42.1 - 66.5 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Uranium-Total 94.5 114 83.2 - 135 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Uranium-Total 88.1 114 83.2 - 135 Acceptable MRAD- Uranium-Total ERA 2nd/2020 05/19/20 32 Air Filter µg/Filter (mass) 138 167 134 - 196 Acceptable MRAD- Uranium-Total Not ERA 2nd/2020 05/19/20 32 Air Filter µg/Filter (mass) 118 167 134 - 196 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Zinc-65 798 694 569 - 1060 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Zinc-65 798 694 569 - 1060 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Gross Alpha 34.4 29.3 15.3 - 48.3 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Air Filter pCi/Filter Gross Beta 61.1 66.4 40.3 - 100 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Americium-241 47.9 45.3 31.1 - 57.9 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cesium-134 1420 1520 1150 - 1670 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cesium-134 1420 1520 1150 - 1670 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cesium-134 1420 1520 1150 - 1670 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cesium-137 2440 2390 2050 - 2720 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cesium-137 2440 2390 2050 - 2720 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cesium-137 2440 2390 2050 - 2720 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cobalt-60 2890 2760 2380 - 3170 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cobalt-60 2890 2760 2380 - 3170 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Cobalt-60 2890 2760 2380 - 3170 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Iron-55 140 152 89.3 - 221 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Manganese-54 <6.25 <100 <100 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Manganese-54 <6.25 <100 <100 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Manganese-54 <6.25 <100 <100 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Plutonium-238 32.5 36.4 21.9 - 47.2 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Plutonium-239 29.7 33.6 20.8 - 41.4 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Strontium-90 426 447 322 - 552 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Uranium-234 187 186 142 - 213 Acceptable MRAD- Not ERA 2nd/2020 05/19/20 32 Water pCi/L Uranium-234 226* 186 142 - 213 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Uranium-238 191 184 143 - 217 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Uranium-238 199 184 143 - 217 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Uranium-Total 387 378 295 - 431 Acceptable MRAD- Not ERA 2nd/2020 05/19/20 32 Water pCi/L Uranium-Total 434.3* 378 295 - 431 Acceptable MRAD- Uranium-Total ERA 2nd/2020 05/19/20 32 Water µg/L (mass) 572 551 446 - 625 Acceptable MRAD- Uranium-Total ERA 2nd/2020 05/19/20 32 Water µg/L (mass) 595 551 446 - 625 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Zinc-65 1330 1190 1060 - 1500 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Zinc-65 1330 1190 1060 - 1500 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Zinc-65 1330 1190 1060 - 1500 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Gross Alpha 67.6 165 60.2 - 228 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Gross Alpha 67.6 165 60.2 - 228 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Gross Beta 143 158 79.0 - 217 Acceptable 139

MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Gross Beta 143 158 79.0 - 217 Acceptable MRAD-ERA 2nd/2020 05/19/20 32 Water pCi/L Tritium 5990 6280 4730 - 7640 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Actinium-228 3530 3290 2170 - 4150 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Americium-241 780 677 366 - 959 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Bismuth-212 3780 3290 942 - 4900 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Bismuth-214 2970 3790 1820 - 5640 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Cesium-134 3760 4180 2860 - 5000 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Cesium-137 6890 6940 5250 - 8780 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Cobalt-60 2280 2520 1980 - 3110 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Lead-214 3680 4080 1710 - 6410 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Lead-214 3720 4080 1710 - 6410 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Manganese-54 <23.9 <1000 <1000 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Plutonium-238 1460 1670 833 - 2540 Acceptable MRAD- 17000 -

ERA 4th/2020 11/16/20 33 Soil pCi/kg Potassium-40 24600 24700 29500 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Strontium-90 5110 4980 1550 - 7760 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Thorium-234 5370 4740 1790 - 8120 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Uranium-234 4550 4780 2240 - 6260 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Uranium-234 5100 4780 2240 - 6260 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Uranium-238 4800 4740 2600 - 6360 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Uranium-238 4870 4740 2600 - 6360 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Uranium-Total 9590 9730 5400 - 12600 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Uranium-Total 10189 9730 5400 - 12600 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Soil µg/kg (mass) 14400 14200 6410 - 19200 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Soil µg/kg (mass) 14600 14200 6410 - 19200 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Soil pCi/kg Zinc-65 1220 1120 895 - 1530 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Americium-241 2680 2940 1820 - 4150 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Cesium-134 862 945 627 - 1260 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Cesium-137 735 823 633 - 1110 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Cobalt-60 663 691 542 - 903 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Curium-244 3100 3400 1920 - 4230 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Manganese-54 <47.5 <300 <300 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Plutonium-238 4470 4590 3180 - 5920 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Plutonium-239 838 768 531 - 972 Acceptable MRAD- 25900 -

ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Potassium-40 33500 34500 43700 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Strontium-90 8790 8690 4900 - 11300 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Uranium-234 2650 2920 2050 - 3720 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Uranium-238 2720 2900 2050 - 3630 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Uranium-Total 5510 5950 3800 - 8020 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Vegetation µg/kg (mass) 8150 8680 6660 - 10800 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Vegetation pCi/kg Zinc-65 1640 1580 1180 - 2340 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Americium-241 22.3 22.2 15.8 - 29.6 Acceptable 140

MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Cesium-134 268 296 192 - 363 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Cesium-137 407 413 339 - 542 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Cobalt-60 507 497 422 - 631 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Iron-55 361 407 149 - 649 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Manganese-54 <3.82 <50.0 <50.0 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Plutonium-238 25.3 28.8 21.7 - 35.4 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Plutonium-239 31 33.7 25.2 - 40.7 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Strontium-90 30.5 36.2 22.9 - 49.3 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Uranium-234 16.5 18.3 13.6 - 21.4 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Uranium-234 19.5 18.3 13.6 - 21.4 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Uranium-238 18.5 18.1 13.7 - 21.6 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Uranium-238 18.2 18.1 13.7 - 21.6 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Uranium-Total 35.8 37.2 27.2 - 44.1 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Air Filter µg/Filter (mass) 55.3 54.3 43.6 - 63.6 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Air Filter µg/Filter (mass) 54.4 54.3 43.6 - 63.6 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Zinc-65 540 500 410 - 764 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Gross Alpha 32.2 26.1 13.6 - 43.0 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Air Filter pCi/Filter Gross Beta 94.2 85.9 52.1 - 130 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Americium-241 185 176 121 - 225 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Cesium-134 849 911 688 - 1000 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Cesium-137 1540 1510 1290 - 1720 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Cobalt-60 1660 1560 1350 - 1790 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Iron-55 267 298 175 - 433 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Manganese-54 <4.61 <100 <100 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Plutonium-238 160 191 115 - 247 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Plutonium-239 81.7 100 61.9 - 123 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Strontium-90 917 787 567 - 973 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-234 33.8 35.2 26.8 - 40.3 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-234 39.2 35.2 26.8 - 40.3 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-238 34.7 34.9 27.0 - 41.1 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-238 32.7 34.9 27.0 - 41.1 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-238 37.3 34.9 27.0 - 41.1 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-Total 70.4 71.8 56.0 - 81.9 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Uranium-Total 78.2 71.8 56.0 - 81.9 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Water µg/L (mass) 104 105 85.0 - 119 Acceptable MRAD- Uranium-Total ERA 4th/2020 11/16/20 33 Water µg/L (mass) 112 105 85.0 - 119 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Zinc-65 1010 917 816 - 1160 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Gross Alpha 100 111 40.5 - 153 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Gross Beta 181 194 97.0 - 267 Acceptable MRAD-ERA 4th/2020 11/16/20 33 Water pCi/L Tritium 11600 12000 9040 - 14600 Acceptable 141

FIGURE 1 COBALT-60 PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 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 2020- December 2020 142

FIGURE 2 CESIUM-137 PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Cesium-137 Performance Evaluation Results and % Bias 100.0 75.0 50.0 Cs-137 25.0 Upper

% Bias 0.0 Control Limit Lower

-25.0 Control Limit

-50.0

-75.0

-100.0 January 2020- December 2020 143

FIGURE 3 TRITIUM PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 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 2020- December 2020 144

FIGURE 4 STRONTIUM-90 PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Strontium-90 Performance Evaluation Results and % Bias 100.0 50.0 Sr-90 Upper

% Bias 0.0 Control Limit Lower Control Limit

-50.0

-100.0 January 2020 - December 2020 145

FIGURE 5 GROSS ALPHA PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Gross Alpha Performance Evaluation Results and % Bias 100.0 50.0 Gross Alpha

% Bias Lower 0.0 Control Limit Upper Control Limit

-50.0

-100.0 January 2020 - December 2020 146

FIGURE 6 GROSS BETA PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Gross Beta Performance Evaluation Results and % Bias 100.0 50.0 Gross Beta

% Bias Upper 0.0 Control Limit Lower Control Limit

-50.0

-100.0 January 2020 - December 2020 147

FIGURE 7 IODINE-131 PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Iodine-131 Performance Evaluation Results and % Bias 100.0 75.0 50.0 Iodine-131 25.0

% Bias Upper 0.0 Control Limit Lower

-25.0 Control Limit

-50.0

-75.0

-100.0 January 2020- December 2020 148

FIGURE 8 AMERICIUM-241 PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Americium-241 Performance Evaluation Results and % Bias 100.0 75.0 50.0 Am-241 25.0

% Bias Lower 0.0 Control Limit Upper

-25.0 Control Limit

-50.0

-75.0

-100.0 January 2020- December 2020 149

FIGURE 9 PLUTONIUM-238 PERFORMANCE EVALUATION RESULTS AND % BIAS 2020 Plutonium-238 Performance Evaluation Results and % Bias 100.0 75.0 50.0 Plutonium-25.0 238

% Bias Upper 0.0 Control Limit Lower

-25.0 Control Limit

-50.0

-75.0

-100.0 January 2020- December 2020 150

TABLE 6 REMP INTRA-LABORATORY DATA

SUMMARY

BIAS AND PRECISION BY MATRIX Bias Criteria (+ / - 25%) Precision Criteria (Note 1)

WITHIN OUTSIDE WITHIN OUTSIDE 2020 Total REMP Intra-Laboratory Data CRITERIA CRITERIA CRITERIA CRITERIA MILK Gas Flow Sr 2nd count 46 0 57 0 Gas Flow Total Strontium 16 0 16 0 Gamma Spec Liquid RAD A-013 with Ba, La 28 0 82 0 Gamma Spec Liquid RAD A-013 with Iodine 0 0 3 0 SOLID Gamma Spec Solid RAD A-013 9 0 12 0 LSC Nickel 63 4 0 4 0 Gas Flow Sr 2nd count 4 0 7 0 Gas Flow Total Strontium 3 0 4 0 Gamma Spec Solid RAD A-013 with Iodine 22 0 48 0 FILTER Gross A & B 512 0 362 0 Gamma Spec Filter 43 0 83 0 LIQUID Alpha Spec Uranium 1 0 1 0 Tritium 212 0 271 0 LSC Iron-55 17 0 15 0 LSC Nickel 63 17 0 15 0 Gamma Iodine-131 6 0 7 0 Alpha Spec Plutonium 1 0 1 0 Gas Flow Sr 2nd count 2 0 3 0 Alpha Spec Am241 Curium 1 0 1 0 Gas Flow Total Strontium 16 0 14 0 Gross Alpha Non Vol Beta 33 0 71 0 Gamma Spec Liquid RAD A-013 with Ba, La 76 0 191 0 Gamma Spec Liquid RAD A-013 with Iodine 25 0 80 0 TISSUE Gamma Spec Solid RAD A-013 40 0 49 0 Gas Flow Sr 2nd count 12 0 10 0 Gas Flow Total Strontium 8 0 7 0 Gamma Spec Solid RAD A-013 with Iodine 21 0 21 0 VEGETATION Gamma Spec Solid RAD A-013 13 0 13 0 Gas Flow Sr 2nd count 10 0 11 0 Gamma Spec Solid RAD A-013 with Iodine 83 0 110 0 AIR CHARCOAL Carbon-14 (Ascarite/Soda Lime Filter per Liter) 35 0 35 0 151

DRINKING WATER Tritium 36 0 39 0 LSC Iron-55 14 0 16 0 LSC Nickel 63 14 0 16 0 Gamma Iodine-131 31 0 22 0 Gas Flow Sr 2nd count 15 0 14 0 Gas Flow Total Strontium 13 0 15 0 Gross Alpha Non Vol Beta 77 0 82 0 Gamma Spec Liquid RAD A-013 with Ba, La 21 0 73 0 Gamma Spec Liquid RAD A-013 with Iodine 0 0 6 0 Total 1537 1887 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.

152

TABLE 7 ALL RADIOLOGICAL INTRA-LABORATORY DATA

SUMMARY

BIAS AND PRECISION BY MATRIX:

Bias Criteria (+ / - 25%) Precision Criteria (Note 1)

WITHIN OUTSIDE WITHIN OUTSIDE 2020 Total All Intra-Laboratory Data CRITERIA CRITERIA CRITERIA CRITERIA MILK Gamma Spec Liquid RAD A-013 5 0 5 0 Gamma Iodine-129 6 0 6 0 Gamma Iodine-131 5 0 116 0 Gas Flow Sr 2nd count 46 0 57 0 Gas Flow Strontium 90 10 0 11 0 Gas Flow Total Strontium 16 0 16 0 Gamma Spec Liquid RAD A-013 with Ba, La 28 0 82 0 Gamma Spec Liquid RAD A-013 with Iodine 5 0 7 0 SOLID Gas Flow Radium 228 71 0 75 0 Alpha Spec Neptunium 471 0 455 0 Tritium 345 0 406 0 Tritium by Pyrolysis 0 0 1 0 Carbon-14 232 0 283 0 Carbon-14 by Pyrolysis 0 0 1 0 LSC Iron-55 135 0 146 0 Alpha Spec Polonium Solid 37 0 52 0 Gamma Nickel 59 RAD A-022 140 0 156 0 LSC Chlorine-36 in Solids 1 0 2 0 Gamma Spec Ra226 RAD A-013 22 0 25 0 Gamma Spec Solid RAD A-013 1122 0 1398 0 LSC Nickel 63 201 0 215 0 LSC Plutonium 219 0 234 0 Technetium-99 543 0 564 0 Gamma Spec Liquid RAD A-013 1 0 1 0 Gross Alpha Beta Soil Leach 31 0 31 0 ICP-MS Technetium-99 in Soil 6 0 3 0 LSC Selenium 79 15 0 19 0 Total Activity, 8 0 13 0 Tritium 26 0 27 0 Alpha Spec Am243 89 0 108 0 Gamma Iodine-129 93 0 160 0 Gas Flow Lead 210 19 0 23 0 Alpha Spec Uranium 746 0 900 0 LSC Promethium 147 1 0 4 0 LSC, Rapid Strontium 89 and 90 67 0 74 0 153

Alpha Spec Thorium 470 0 567 0 ICP-MS Uranium-233, 234 in Solid 55 0 57 0 LSC Sulfur 35 2 0 3 0 Alpha Spec Neptunium (pCi/Sample) 3 0 3 0 Alpha Spec Plutonium 509 0 486 0 ICP-MS Technetium-99 Prep in Soil 6 0 3 0 LSC Calcium 45 0 0 1 0 Alpha Spec Plutonium 158 0 232 0 Alpha Spec Radium 226 34 0 45 0 Dissolution Soil Prep 4 0 4 0 Gas Flow Sr 2nd count 27 0 35 0 Gas Flow Strontium 90 335 0 308 0 Gas Flow Total Radium 2 0 2 0 Lucas Cell Radium 226 98 0 116 0 Alpha Spec Am241 Curium 438 0 483 0 Alpha Spec Total Uranium 62 0 64 0 Gas Flow Total Strontium 51 0 53 0 ICP-MS Uranium-233, 234 Prep in Solid 57 0 59 0 ICP-MS Uranium-235, 236, 238 in Solid 57 0 65 0 Alpha Spec Polonium Solid 3 0 3 0 Gamma Spec Solid RAD A-013 with Iodine 22 0 48 0 GFC Chlorine-36 in Solids 13 0 19 0 Gamma Spec Solid RAD A-013 (pCi/Sample) 6 0 5 0 Technetium-99 3 0 3 0 Tritium 1 0 3 0 Alpha Spec Am241 (pCi/Sample) 3 0 3 0 ICP-MS Uranium-234, 235, 236, 238 in Solid 223 0 264 0 ICP-MS Uranium-235, 236, 238 Prep in Solid 65 0 81 0 Alpha Spec Thorium 2 0 3 0 Gross Alpha/Beta (Am/Cs Calibration) Solid 0 0 2 0 ICP-MS U-234, 235, 236, 238 Prep per sample 13 0 13 0 Gross Alpha/Beta 403 0 502 0 Alpha Spec Plutonium 3 0 3 0 Gas Flow Strontium 90 3 0 3 0 Gross Alpha/Beta (Americium Calibration)

Solid 1 0 1 0 ICP-MS Uranium-234, 235, 236, 238 Prep in Solid 93 0 149 0 Gross Alpha Beta (F,U) 30 0 33 0 FILTER Alpha Spec Polonium 0 0 8 0 Gamma I-131, filter 5 0 5 0 Alpha Spec Neptunium 69 0 109 0 LSC Plutonium Filter 74 0 129 0 Tritium 34 0 242 0 154

Carbon-14 Direct Count 0 0 54 0 Carbon-14 1 0 97 0 ICP-MS Tc-99 in Filter 0 0 5 0 Nickel-63 0 0 25 0 LSC Iron-55 76 0 94 0 Gamma Nickel 59 RAD A-022 84 0 110 0 Alpha Spec Californium FPL 12 0 12 0 LSC Nickel 63 71 0 98 0 Technetium-99 7 0 103 0 Gamma Spec Filter RAD A-013 158 0 246 0 ICP-MS Tc-99 Prep in Filter 0 0 9 0 Alphaspec Np Filter per Liter 19 0 24 0 Alphaspec Pu Filter per Liter 19 0 33 0 Gamma Iodine-129 1 0 79 0 Alpha Spec Am243 17 0 38 0 Gas Flow Lead 210 1 0 6 0 Alpha Spec Uranium 49 0 118 0 LSC Promethium 147 0 0 1 0 LSC, Rapid Strontium 89 and 90 89 0 107 0 Alpha Spec Thorium 34 0 91 0 Gas Flow Radium 228 2 0 16 0 Alpha Spec Plutonium 48 0 121 0 ICP-MS Uranium-233, 234 in Filter 1 0 10 0 LSC Sulfur 35 0 0 1 0 Alpha Spec Plutonium 96 0 176 0 Alpha Spec Plutonium 11 0 11 0 Alpha Spec Polonium,(Filter/Liter) 0 0 2 0 Alpha Spec Radium 226 0 0 13 0 Gas Flow Sr 2nd Count 34 0 60 0 Gas Flow Strontium 90 57 0 101 0 Gas Flow Total Radium 1 0 5 0 LSC Plutonium 241 Filter per Liter 20 0 45 0 Lucas Cell Radium-226 0 0 12 0 Alpha Spec Am241Curium 101 0 181 0 ICP-MS Uranium-233, 234 Prep in Filter 1 0 9 0 ICP-MS Uranium-235, 236, 238 in Filter 4 0 13 0 Total Activity in Filter, 0 0 51 0 Alphaspec Am241 Curium Filter per Liter 33 0 76 0 Tritium 96 0 130 0 GFC Chlorine-36 in Filters 0 0 1 0 Gamma Spec Filter RAD A-013 Direct Count 3 0 9 0 Carbon-14 22 0 35 0 GFC Chlorine-36 in Filters PL 1 0 1 0 Gross A & B (Americium Calibration) Liquid 1 0 42 0 Direct Count-Gross Alpha/Beta 89 0 0 0 Gross Alpha/Beta 41 0 57 0 155

ICP-MS Uranium-234, 235, 236, 238 in Filter 7 0 55 0 ICP-MS Uranium-235, 236, 238 Prep in Filter 4 0 12 0 Alpha Spec U 33 0 77 0 Gross A & B 568 0 443 0 LSC Iron-55 8 0 17 0 Technetium-99 29 0 49 0 Gas Flow Sr-90 19 0 45 0 LSC Nickel 63 37 0 45 0 Gamma Spec Charcoal 11 0 11 0 Gas Flow Pb-210 13 0 34 0 Gas Flow Ra-228 13 0 28 0 Gross Alpha Beta (Flame, Unflame) 10 0 10 0 Direct Count- Alpha/Beta (Americium Calibration) 21 0 0 0 Gamma Iodine 129 8 0 8 0 ICP-MS Uranium-234, 235, 236, 238 Prep in Filter 3 0 27 0 Gamma Spec Filter 99 0 154 0 Lucas Cell Ra-226 8 0 38 0 Alpha Spec Thorium 23 0 47 0 LIQUID Alpha Spec Uranium 496 0 756 0 Alpha Spec Polonium 19 0 20 0 Alpha Spec Neptunium 172 0 236 0 Tritium 1276 0 1383 0 Carbon-14 186 0 219 0 Plutonium 131 0 151 0 Chlorine-36 in Liquids 4 0 5 0 Iodine-131 6 0 4 0 LSC Iron-55 100 0 167 0 Gamma Nickel 59 RAD A-022 27 0 43 0 Gamma Iodine 131 RAD A-013 2 0 2 0 LSC Nickel 63 144 0 197 0 LSC Radon 222 18 0 22 0 Technetium-99 673 0 720 0 Gamma Spec Liquid RAD A-013 859 0 970 0 Alpha Spec Total U RAD A-011 24 0 40 0 LSC Selenium 79 38 0 38 0 Total Activity, 15 0 20 0 Alpha Spec Am243 20 0 26 0 Gamma Iodine-129 145 0 182 0 Gamma Iodine-131 6 0 7 0 ICP-MS Technetium-99 in Water 8 0 9 0 Gas Flow Lead 210 11 0 16 0 Gross Alpha, Beta 5 0 5 0 LSC Promethium 147 22 0 22 0 LSC, Rapid Strontium 89 and 90 9 0 15 0 156

Alpha Spec Thorium 237 0 316 0 Gas Flow Radium 228 14 0 7 0 Gas Flow Radium 228 682 0 728 0 Alpha Spec Plutonium 354 0 482 0 LSC Sulfur 35 17 0 17 0 Alpha Spec Plutonium 41 0 51 0 Alpha Spec Radium 226 32 0 37 0 Gas Flow Sr 2nd count 102 0 161 0 Gas Flow Strontium 90 511 0 584 0 Gas Flow Strontium 90 5 0 5 0 Gas Flow Total Radium 428 0 328 0 ICP-MS Technetium-99 Prep in Water 8 0 9 0 ICP-MS Uranium-233, 234 in Liquid 7 0 11 0 LSC Calcium 45 15 0 15 0 Lucas Cell Radium 226 372 0 597 0 Lucas Cell Radium-226 12 0 13 0 Chlorine-36 in Liquids 19 0 21 0 Alpha Spec Am241 Curium 317 0 427 0 Gas Flow Total Strontium 100 0 103 0 Gross Alpha Non Vol Beta 868 0 1213 0 LSC Phosphorus-32 4 0 4 0 ICP-MS Uranium-233, 234 Prep in Liquid 5 0 9 0 Tritium in Drinking Water by EPA 906.0 5 0 5 0 Gamma Spec Liquid RAD A-013 with Ba, La 78 0 203 0 Gamma Spec Liquid RAD A-013 with Iodine 97 0 174 0 Gas Flow Strontium 89 & 90 2 0 3 0 ICP-MS Uranium-235, 236, 238 in Liquid 11 0 13 0 Gas Flow Total Alpha Radium 15 0 15 0 Gross Alpha Co-precipitation 3 0 28 0 ICP-MS Uranium-235, 236, 238 Prep in Liquid 7 0 11 0 Gross Alpha/Beta 0 0 1 0 ICP-MS Uranium-234, 235, 236, 238 in Liquid 147 0 132 0 Gross Alpha Beta (Flame, Unflame) 284 0 303 0 Gross Alpha Beta (Americium Calibration)

Liquid 47 0 95 0 ICP-MS Uranium-234, 235, 236, 238 Prep in Liquid 69 0 66 0 Alpha/Beta (Americium Calibration) Drinking Water 38 0 37 0 TISSUE Gamma Spec Solid RAD A-013 48 0 63 0 Alpha Spec Uranium 5 0 6 0 Alpha Spec Plutonium 5 0 5 0 Gas Flow Sr 2nd count 12 0 10 0 Gas Flow Strontium 90 7 0 6 0 Alpha Spec Am241 Curium 3 0 3 0 157

Gas Flow Total Strontium 8 0 7 0 Gamma Spec Solid RAD A-013 with Iodine 21 0 21 0 Gross Alpha/Beta 3 0 3 0 VEGETATION Carbon-14 3 0 2 0 Gamma Spec Solid RAD A-013 39 0 36 0 Tritium 2 0 1 0 Gas Flow Lead 210 0 0 5 0 Alpha Spec Uranium 25 0 21 0 Alpha Spec Thorium 10 0 10 0 Alpha Spec Plutonium 24 0 17 0 Gas Flow Sr 2nd count 10 0 11 0 Gas Flow Strontium 90 21 0 14 0 Gas Flow Total Radium 3 0 5 0 Alpha Spec Am241 Curium 6 0 5 0 Gamma Spec Solid RAD A-013 with Iodine 83 0 110 0 Gamma Spec Solid RAD A-013 (pCi/Sample) 3 0 3 0 Alpha Spec Am241 (pCi/Sample) 3 0 3 0 Alpha Spec Uranium 0 0 3 0 Gross Alpha/Beta 5 0 8 0 Alpha Spec Plutonium 0 0 3 0 Gas Flow Strontium 90 6 0 3 0 AIR CHARCOAL Gamma Iodine-129 19 0 8 0 Carbon-14 15 0 15 0 Carbon-14 (Ascarite/Soda Lime Filter per Liter) 35 0 35 0 Gamma Spec Charcoal 15 0 15 0 Gamma Iodine 129 15 0 15 0 DRINKING WATER Alpha Spec Uranium 2 0 1 0 Tritium 38 0 41 0 LSC Iron-55 14 0 16 0 LSC Nickel 63 14 0 16 0 LSC Radon 222 9 0 10 0 Gamma Spec Liquid RAD A-013 4 0 4 0 Gamma Iodine-129 3 0 5 0 Gamma Iodine-131 31 0 22 0 Gas Flow Lead 210 1 0 1 0 Gas Flow Radium 228 43 0 46 0 Gas Flow Radium 228 0 0 3 0 Gas Flow Sr 2nd count 15 0 14 0 Gas Flow Strontium 90 12 0 13 0 Gas Flow Total Radium 2 0 1 0 Lucas Cell Radium 226 3 0 3 0 Lucas Cell Radium-226 48 0 46 0 158

Gamma Spec Drinking Water RAD A-013 35 0 28 0 Gas Flow Total Strontium 13 0 15 0 Gross Alpha Non Vol Beta 175 0 188 0 Tritium in Drinking Water by EPA 906.0 44 0 44 0 Gamma Spec Liquid RAD A-013 with Ba, La 21 0 73 0 Gamma Spec Liquid RAD A-013 with Iodine 0 0 6 0 Gas Flow Strontium 89 & 90 18 0 4 0 Alpha/Beta (Americium Calibration) Drinking Water 13 0 11 0 ECLS-R-GA NJ 48 Hr Rapid Gross Alpha 5 0 5 0 Total 20799 26108 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.

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TABLE 8 2020 CORRECTIVE ACTION REPORT

SUMMARY

CORRECTIVE ACTION ID#

& DISPOSITION PE FAILURE CORRECTIVE ACTION ID# & PE FAILURE DISPOSITION CARR 201214-1296 Root Cause Analysis ISO Documentation of PT Failure in MAPEP 43: Upon receipt of the PT report, an investigation was initiated by the

Fe-55 in soil 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 the method. Additionally, all internal procedures and policies were performed as required. These failures were tracked through GELs internal non-conformance system.

Iron-55:

The laboratory reviewed the data and noted that the tracer recoveries for this analysis were lower than typical soil tracer recoveries. The lower tracer recoveries contributed to an uncertainty of approximately 25%.

The sample was recounted and recovered at 97% of the known value.

Permanent Corrective/Preventive Actions or Improvements None at this time. The laboratory will continue to monitor the recoveries of these parameters to ensure that there are no continued issues in the processes.

CARR 200902-1287 Root Cause Analysis ISO Documentation of PT Failure in RAD-122 in The data was reviewed and no anomalies were noted. The batch drinking water for: duplicate result from the original analysis met the acceptance criteria of the study and replication criteria of the laboratory with

Ba-133 RPDs of <10% for both isotopes. Laboratory processes were

Co-60 evaluated and no gross errors were found. The other reported analytes for this method were within the limits of the study. A definitive contributor to the slightly high bias could not be identified concluding that this was an isolated occurrence for these isotopes.

Permanent Corrective/Preventive Actions or Improvements 160

None at this time. The laboratory will continue to monitor the recoveries of these parameters to ensure that there are no continued issues in the processes CARR 200902-1278 Root Cause Analysis ISO Documentation of PT Failure in MRAD - 32 for: Filter: The sample was analyzed at 20X. As part of the investigation, the sample was reanalyzed at 5X and the results

U-238 filter were within acceptance limits.

Total U (mass) filter Water: The samples were reanalyzed, and the results were within

U-234 water the acceptance limits. In reviewing the data, the laboratory

Total U water suspects a possible bias in the lower end of the calibration.

Permanent Corrective/Preventive Actions or Improvements Filter: The laboratory will be analyzing the sample without dilutions.

The dilutions will only be performed when necessary.

Water: The laboratory will be adding another point to the lower end of the calibration to remove potential bias in that section of the calibration.

The laboratory successfully analyzed these isotopes during the next round of MRAD samples.

CARR 200224-1274 Root Cause Analysis ISO Documentation of PT failures in drinking water Strontium-89-A review of the data and the preparation processes of RAD-120 for did not reveal any errors or possible contributors to the high bias.

In addition, the reported values are 117% and 114% of the

Sr-89 reference value which are with the laboratorys standard

Tritium acceptance criteria of +/- 25% for Laboratory Control Samples.

I - 131 Tritium-All data and laboratory processes were evaluated, and no errors were found. The Laboratory has concluded that this low bias was an isolated occurrence and that the overall process is within control.

Iodine-131- The laboratory has reviewed the data and found no errors. All batch QC samples including a duplicate, met acceptability criteria. The laboratory will continue to investigate all steps of the analytical process.

Permanent Corrective/Preventive Actions or Improvements None needed at this time. The laboratory must assume unidentified random errors caused the biases because all quality control criteria were met in the batch.

Subsequent analyses of these isotopes for drinking water were acceptable in other PT samples during the year.

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8.0 DCPP LAND USE CENSUS 163

2020 DCPP Land Use Census Diablo Canyon Power Plant (DCPP) was owned and operated by Pacific Gas & Electric (PG&E) Company. PG&E owned and provided environmental stewardship to approximately 14 miles of Pacific Ocean coastline and approximately 13,000 acres surrounding the 1,000 acre DCPP site boundary. The PG&E property extended roughly from Avila Beach to Montana de Oro State Park.

DCPP was located approximately seven miles WNW of Avila Beach and approximately four miles SSE of Montana de Oro State Park.

DCPP Radiological Environmental Monitoring Program (REMP) personnel conducted a Land Use Census (LUC) in the vicinity of DCPP for 2020. The LUC was based on Nuclear Regulatory Commission (NRC) Regulatory Guide 4.8, Environmental Technical Specifications for Nuclear Power Plants. The LUC also provided compliance with 10 CFR 50 Appendix I Section IV (B)(3); "Identify changes in the use of unrestricted areas (e.g., for agricultural purposes) to permit modifications in monitoring programs for evaluating doses to individuals from principal pathways of exposure".

DCPP Program Directive CY2, Radiological Monitoring and Controls Program required performance of a LUC. DCPP procedure RP1.ID11, Environmental Radiological Monitoring Procedure, required identification of the nearest milk animal, nearest residence, and the nearest broadleaf producing garden greater than 50 square meters (500 square feet) in each of the landward meteorological sectors within a radial distance of 8 kilometers (5 miles) of the Unit One Containment (CTMT) structure. A LUC was conducted at least once per year during the growing season (between Feb 15 and Dec 1) for the Diablo Canyon environs.

The 2020 LUC was conducted via landowner telephone or email interviews. Interviews were conducted March 24th through March 30th 2020. Ten individual landowners or tenants were contacted.

Milk:

No milk animals were identified within the first 8 kilometers (5 miles) of any sector.

Residences:

The nearest residence, relative to all sectors, was a small trailer located in the NNW sector about 2.43 kilometers (1.51 miles) from the plant. One ranch worker occupied this BLANCHARD trailer approximately 5 days per year.

Twenty structures were identified within the 8-kilometer (5-mile) radius of the site, which were confirmed or appear to have been occupied in 2020. Twenty-two abandoned structures were identified within the 8-kilometer (5-mile) radius of the site during the LUC.

The nearest residence in each sector was summarized in Table 8.

Gardens:

The LUC identified two household gardens greater than 50 square meters (500 square feet) that produced broadleaf vegetation. The READ garden (REMP station 3C1) was approximately 1/4 acre and located in the NNE sector at 7.12 kilometers (4.42 miles). The KOONZE garden (REMP station 6C1) was approximately 500 square feet and located in the E sector at 7.46 kilometers (4.63 miles).

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Additional Land Use:

It should be noted that the term site-boundary referred to the area within a radius of approximately 1.2 km (0.74 mi) from the Unit One CTMT structure. The area outside the "site-boundary" was also referred to as the "unrestricted area". Much of the area outside the site-boundary was routinely used for rotational cattle grazing by five separate cattle operations. For purposes of this land use census, the five cattle operations were called BLANCHARD, SINSHEIMER, READ, ANDRE, and MELLO.

BLANCHARD allowed cattle to graze within the DCPP environs in 2020. BLANCHARD did not graze any goats or sheep within 8 km (5 miles) of DCPP in 2020 due to drought conditions in San Luis Obispo County.

BLANCHARDs livestock were sold under the "Old Creek Ranch" label at local farmer's markets in 2020. "Old Creek Ranch" labeled meats were sampled quarterly by REMP personnel in 2020. The REMP station codes were BCM, BGM, and BSM (if available).

SINSHEIMER had about 100 cattle outside the site-boundary in the NNE sector. The cows were allowed to breed and about 90 yearling calves were sold to mass market in 2020. SINSHEIMER did not slaughter any cattle in 2020 for personal consumption.

READ had about 94 cows, 4 bulls, and 82 yearling calves outside the site-boundary in the NNE sector. About 82 yearling calves were sold to mass market in 2020. READ did not slaughter any cattle in 2020 for personal consumption.

ANDRE had about 50 cattle outside the site-boundary in the ENE sector. About 50 yearling calves were sold to mass market in 2020. ANDRE did not slaughter any cattle in 2020 for personal consumption.

MELLO managed about 600 cattle outside the site-boundary in the E, ESE, and SE sectors. A commercial cattle corporation owned these cattle and sold all of them to mass market in 2020. MELLO did not slaughter any cattle in 2020 for personal consumption.

Two landowners (JOHE and ANDRE) harvested wild game for personal consumption outside the site-boundary in the NNE, NE, and ENE sectors. This wild game consisted of approximately 2-4 deer per landowner.

165

There was a California State Park Ranger Office in the NNW sector at 7.48 kilometers (4.65 miles) from the site. Approximately three State Parks staff personnel occupied this office from 1000 to 1500 each day (365 days per year).

There was a public campground (Islay Creek Campground) located in the NNW sector at Montana de Oro State Park at 7.31 kilometers (4.54 miles). This campground was near Spooner's Cove.

Approximately 713,000 people visited Montana de Oro State Park via day-use permit.

Approximately 22,000 people spent the night at Islay Creek Campground.

There was public access to hiking trails at the north and south ends of the PG&E property in 2020.

The Point Buchon Trail was located at the north end of PG&E property and had about 18,000 visitors in 2020. The trail traversed about 3.4 miles of coastline from Coon Creek to Lion Rock overlook. The trail was open to the public for day hikes Thursday thru Monday from approximately 0800-1700. Two to three people from California Land Management occupied the trail head booth near Coon Creek during operational days from 0700 to 1730. This trail was originally opened to the public on July 13, 2007.

The Pecho Coast Trail was located at the south end of PG&E property and had about 3,000 visitors in 2020. The trail was approximately 3.8 miles long and led from the Avila Beach DCPP entrance gate to the Point San Luis Lighthouse property. Pecho Coast Trail hikes were only available on Wednesdays (about 20 people) and Saturdays (about 40 people). An extension of the trail up the coastline to Rattlesnake Canyon made the trail 8 miles roundtrip and was only available on Mondays (about 20 people each trip). This trail extension was improved in October 2017 to allow controlled vehicle access on the trail. Access was controlled (via web-site reservation permission only) and conducted by docents from approximately 0900 to 1500. This trail was just slightly outside the 5 mile radius of the DCPP site. This Pecho Coast Trail has been open for docent-guided hikes since 1993.

Thirty to forty Port San Luis Lighthouse keepers occupied the lighthouse grounds on Tuesdays, Thursdays, and Saturdays from 0800-1600. Special events were also held at the lighthouse throughout the year (e.g. weddings, fundraisers, reunions, etc). The lighthouse property was owned by the Port San Luis Harbor District.

NEI 07-07 Groundwater Protection Initiative (GPI) Review:

There were no site construction activities or radioactive spills that warranted changes to GPI monitoring frequencies, monitoring locations, lab analytical capabilities, or analytical detection thresholds in 2020.

There were no changes in on-site or near site groundwater usage.

Groundwater beneath the site power block was not used as a source of drinking water.

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Old Steam Generator Storage Facility (OSGSF):

The OSGSF vault was located within the site-boundary in the ENE sector (68.3 degrees) at 0.99 km (0.61 mi) from Unit One CTMT.

The following plant equipment was placed into the OSGSF for the duration of the site operating license on the dates indicated below.

Unit One old steam generators (4 total) : 2/14/2009 Unit Two old steam generators (4 total) : 3/2/2008 Unit One old reactor head (1 total) : 10/23/2010 Unit Two old reactor head (1 total) : 11/6/2009 Independent Spent Fuel Storage Installation (ISFSI):

The on-site dry cask ISFSI pad was located within the site-boundary in the ENE sector (58.47 degrees) at 0.36 km (0.22 mi) from Unit One CTMT.

DCPP loaded it's first ISFSI dry cask onto the pad on 6/23/2009.

There were no dry cask loading campaigns in 2020.

At the end of 2020, a total of 58 dry casks occupy the ISFSI pad.

Table 8 summarizes the nearest residence location in each meteorological sector.

The Land Use Figure shows the location of the residences and gardens in the vicinity of DCPP.

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Table 8 Land Use Census 2020 Distance in kilometers (and miles) from the center point of U-1 CTMT Nearest Milk Animal, Residence, and Vegetable Garden 221/2 Degree (a) Nearest Nearest Residence Nearest Radial Sector Milk Animal Residence Azimuth Vegetable km (mi) Degree Garden km (mi)

NW None 5.76 (3.58) 325.18 None NNW None 2.43 (1.51) (b) 332.01 None N None None None NNE None 5.18 (3.22) 21.43 7.12 (4.42) (c)

NE None 7.94 (4.93) 35.33 None ENE None 7.15 (4.45) 63.84 None E None 5.96 (3.71) 89.89 7.46 (4.63) (d)

ESE None None None SE None None None Table Notation:

(a)

Sectors not shown were over water and contained no land (other than islets not used for the purposes indicated in this table) beyond the site-boundary.

(b)

BLANCHARD trailer was the residence used for critical receptor calculations.

(c)

The READ (REMP station 3C1) vegetable garden was located in the NNE sector and the 19.89 azimuth degree. There was also a limited use residence at this location.

(d)

The KOONZE (REMP station 6C1) vegetable garden was located in the E sector and the 97.26 azimuth degree. There was also a full-time residence at this location.

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1 Cayucos 101 41 Morro Bay N 1 NNW NNE Los Os o NW s Vall NE ey Roa d

San Luis Obispo o Cyn. Rd.

fum er P ENE S ee Cyn e .

Cre k b lo Dia Rd DCPP E Pacific # Avila Beach Ocean 227

Shell Beach ESE Pismo Beach #

5 Mile Radius 101 SE Grover Beach #

UNITS 1 AND 2 DIABLO CANYON SITE N

Gardens or Farm Residences 0 1 2 3 4 5 SCALE IN MILES Units 1 and 2 Diablo Canyon169Power Plant Land Use Census.

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9.0 DCPP WIND ROSE CHART 171

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Joint Frequency Distribution Wind Speed and Wind Direction Diablo Canyon Power Plant 10 Meter Level Year 2020 N

28.06 1.07 3.56 1.28 3.29 21.58 3.01 W 3.95 2.39 E 2.09 4.68 2.06 8.66 2.48 7.34 4.49 S

Calms excluded.

0.1 3.5 6.9 11.5 18.4 24.2 Rings drawn at 10% intervals.

Wind flow is FROM the directions shown.

Wind Speed ( Miles Per Hour) 301 observations were missing.

PERCENT OCCURRENCE: Wind Speed ( Miles Per Hour) PERCENT OCCURRENCE: Wind Speed ( Miles Per Hour)

LOWER BOUND OF CATEGORY LOWER BOUND OF CATEGORY DIR 0.1 3.5 6.9 11.5 18.4 24.2 DIR 0.1 3.5 6.9 11.5 18.4 24.2 N 0.12 0.61 0.32 0.02 0.00 0.00 S 2.10 1.82 0.38 0.15 0.05 0.00 NNE 0.16 0.86 0.24 0.02 0.00 0.00 SSW 1.46 0.80 0.18 0.02 0.00 0.01 NE 0.46 1.30 1.19 0.31 0.04 0.00 SW 1.16 0.72 0.15 0.04 0.00 0.00 ENE 0.83 1.08 0.60 0.47 0.02 0.00 WSW 1.07 0.81 0.19 0.01 0.00 0.00 E 1.08 0.91 0.35 0.04 0.01 0.00 W 1.31 1.79 0.52 0.29 0.04 0.00 ESE 2.17 1.56 0.72 0.24 0.00 0.00 WNW 1.47 4.37 5.25 5.68 3.52 1.28 SE 2.77 3.89 1.59 0.39 0.02 0.00 NW 1.03 3.95 6.26 8.74 4.56 3.52 SSE 2.29 3.55 1.19 0.08 0.19 0.05 NNW 0.16 1.28 1.60 0.47 0.04 0.00 TOTAL OBS = 8483 MISSING OBS = 301 CALM OBS = 0 173

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Joint Frequency Distribution Wind Speed and Wind Direction Diablo Canyon Power Plant 10 Meter Level 2016-2020 N

29.34 1.11 4.69 1.44 3.20 17.40 2.95 W 4.04 2.50 E 2.35 5.29 2.19 9.94 2.76 7.02 3.77 S

Calms excluded.

0.1 3.5 6.9 11.5 18.4 24.2 Rings drawn at 10% intervals.

Wind flow is FROM the directions shown.

Wind Speed ( Miles Per Hour) 503 observations were missing.

PERCENT OCCURRENCE: Wind Speed ( Miles Per Hour) PERCENT OCCURRENCE: Wind Speed ( Miles Per Hour)

LOWER BOUND OF CATEGORY LOWER BOUND OF CATEGORY DIR 0.1 3.5 6.9 11.5 18.4 24.2 DIR 0.1 3.5 6.9 11.5 18.4 24.2 N 0.24 0.46 0.23 0.02 0.00 0.16 S 1.79 1.51 0.33 0.08 0.03 0.02 NNE 0.36 0.69 0.30 0.05 0.00 0.05 SSW 1.69 0.88 0.14 0.03 0.01 0.02 NE 0.58 1.22 1.07 0.25 0.05 0.03 SW 1.07 0.84 0.26 0.02 0.00 0.01 ENE 0.82 0.92 0.72 0.44 0.03 0.02 WSW 0.96 0.72 0.50 0.17 0.00 0.00 E 1.22 0.78 0.35 0.13 0.00 0.02 W 1.12 1.53 0.49 0.62 0.21 0.06 ESE 1.99 1.60 0.83 0.75 0.12 0.01 WNW 1.19 3.81 4.24 4.70 2.36 1.09 SE 2.43 4.06 2.29 0.91 0.18 0.07 NW 0.93 3.72 6.10 8.86 5.38 4.36 SSE 2.05 3.23 1.18 0.29 0.20 0.07 NNW 0.25 1.36 1.73 1.01 0.25 0.10 TOTAL OBS = 43345 MISSING OBS = 503 CALM OBS = 0 175

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10.0 REFERENCES

1. NRC Radiological Assessment Branch Technical Position on Environmental Monitoring, Revision 1, November 1979

2. NUREG-1301 "Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Pressurized Water Reactors"

3. REG GUIDE 4.1 (Rev 1) "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants"

4. REG GUIDE 4.15 (Rev 1) "Quality Assurance for Radiological Monitoring Programs (Normal Operations) - Effluent Streams and the Environment"

5. NRC Regulatory Issue Summary 2008-03, Return/Re-use of Previously Discharged Radioactive Effluents; February 13, 2008

6. ANSI/HPS N13.37-2014, "Environmental Dosimetry - Criteria for System Design and Implementation"

7. NEI 07-07, Industry Groundwater Protection Initiative - Final Guidance Document, Rev 1, March 2019

8. DCPP Program Directive, CY2, Radiological Monitoring and Controls Program.

9. DCPP Interdepartmental Administrative Procedure (IDAP), RP1.ID11, Environmental Radiological Monitoring Procedure.

10. DCPP Interdepartmental Administrative Procedure (IDAP), RP1.ID13, DCPP Groundwater Protection Initiative Program.

11. "Groundwater Gradient Analysis", by Entrix Corporation, March 2010

12. "Groundwater Gradient Analysis", by Cardno/Entrix Corporation, June 2012

13. "Diablo Canyon Power Plant Site Conceptual Model Report", by ERM July 30, 2014 177

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178

APPENDIX A ANALYTICAL SAMPLE RESULTS 179

2020 DCPP REMP Analysis Results Appendix A 0S2 North Gate - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 0S2 North Gate(500231017) - AC 4-Jan-20 Iodine-131 -3.13E-03 5.38E-03 3.98E-03 pCi/m3 0S2 North Gate(500490008) - AC 11-Jan-20 Iodine-131 1.91E-03 1.05E-02 6.18E-03 pCi/m3 0S2 North Gate(501031013) - AC 18-Jan-20 Iodine-131 3.05E-03 1.07E-02 5.99E-03 pCi/m3 0S2 North Gate(502000015) - AC 25-Jan-20 Iodine-131 -3.32E-03 6.65E-03 4.62E-03 pCi/m3 0S2 North Gate(502411013) - AC 1-Feb-20 Iodine-131 2.92E-03 7.47E-03 4.13E-03 pCi/m3 0S2 North Gate(503155015) - AC 8-Feb-20 Iodine-131 9.77E-04 9.77E-03 5.70E-03 pCi/m3 0S2 North Gate(503851013) - AC 15-Feb-20 Iodine-131 -2.78E-03 6.21E-03 4.43E-03 pCi/m3 0S2 North Gate(504528013) - AC 22-Feb-20 Iodine-131 5.29E-04 7.55E-03 4.27E-03 pCi/m3 0S2 North Gate(505332008) - AC 29-Feb-20 Iodine-131 1.94E-03 8.10E-03 4.49E-03 pCi/m3 0S2 North Gate(505759015) - AC 7-Mar-20 Iodine-131 2.09E-04 8.91E-03 5.13E-03 pCi/m3 0S2 North Gate(506435015) - AC 14-Mar-20 Iodine-131 1.58E-03 8.32E-03 4.73E-03 pCi/m3 0S2 North Gate(507015013) - AC 21-Mar-20 Iodine-131 2.11E-03 9.55E-03 5.47E-03 pCi/m3 0S2 North Gate(507592008) - AC 27-Mar-20 Iodine-131 1.22E-03 7.34E-03 4.07E-03 pCi/m3 0S2 North Gate(508867013) - AC 4-Apr-20 Iodine-131 2.56E-03 8.77E-03 4.83E-03 pCi/m3 0S2 North Gate(508984017) - AC 11-Apr-20 Iodine-131 1.31E-04 9.52E-03 6.09E-03 pCi/m3 0S2 North Gate(509370017) - AC 18-Apr-20 Iodine-131 1.75E-03 9.42E-03 5.22E-03 pCi/m3 0S2 North Gate(509745008) - AC 25-Apr-20 Iodine-131 1.16E-03 1.08E-02 6.37E-03 pCi/m3 0S2 North Gate(510179013) - AC 2-May-20 Iodine-131 -1.86E-03 8.52E-03 5.58E-03 pCi/m3 0S2 North Gate(510640013) - AC 9-May-20 Iodine-131 -4.79E-03 6.86E-03 5.19E-03 pCi/m3 0S2 North Gate(510747015) - AC 16-May-20 Iodine-131 3.15E-03 7.90E-03 4.48E-03 pCi/m3 0S2 North Gate(511437013) - AC 23-May-20 Iodine-131 -6.29E-04 8.07E-03 4.80E-03 pCi/m3 0S2 North Gate(512099013) - AC 30-May-20 Iodine-131 2.55E-05 6.88E-03 4.58E-03 pCi/m3 0S2 North Gate(512380013) - AC 6-Jun-20 Iodine-131 -3.95E-03 9.20E-03 6.38E-03 pCi/m3 0S2 North Gate(513083017) - AC 13-Jun-20 Iodine-131 1.84E-03 1.21E-02 6.80E-03 pCi/m3 0S2 North Gate(513584013) - AC 20-Jun-20 Iodine-131 1.12E-03 1.23E-02 7.10E-03 pCi/m3 0S2 North Gate(514894011) - AC 27-Jun-20 Iodine-131 -4.15E-03 5.86E-03 4.86E-03 pCi/m3 0S2 North Gate(514398015) - AC 4-Jul-20 Iodine-131 -8.39E-04 8.75E-03 5.24E-03 pCi/m3 0S2 North Gate(514716021) - AC 11-Jul-20 Iodine-131 4.39E-03 1.04E-02 5.65E-03 pCi/m3 0S2 North Gate(515649017) - AC 18-Jul-20 Iodine-131 3.28E-04 9.38E-03 5.48E-03 pCi/m3 0S2 North Gate(517082013) - AC 25-Jul-20 Iodine-131 -1.04E-03 7.95E-03 4.76E-03 pCi/m3 0S2 North Gate(516773013) - AC 1-Aug-20 Iodine-131 -5.19E-03 6.96E-03 5.95E-03 pCi/m3 0S2 North Gate(517339038) - AC 8-Aug-20 Iodine-131 -1.07E-03 8.43E-03 5.02E-03 pCi/m3 0S2 North Gate(517997017) - AC 15-Aug-20 Iodine-131 3.40E-03 8.86E-03 5.05E-03 pCi/m3 0S2 North Gate(518816027) - AC 22-Aug-20 Iodine-131 -2.55E-05 1.21E-02 7.23E-03 pCi/m3 0S2 North Gate(518822025) - AC 29-Aug-20 Iodine-131 2.54E-03 1.15E-02 6.32E-03 pCi/m3 0S2 North Gate(520288015) - AC 5-Sep-20 Iodine-131 1.39E-03 6.16E-03 3.29E-03 pCi/m3 180

2020 DCPP REMP Analysis Results Appendix A 0S2 North Gate(520368013) - AC 12-Sep-20 Iodine-131 1.13E-02 1.35E-02 1.44E-02 pCi/m3 0S2 North Gate(521272013) - AC 19-Sep-20 Iodine-131 9.10E-04 1.42E-02 8.15E-03 pCi/m3 0S2 North Gate(521863013) - AC 26-Sep-20 Iodine-131 -6.68E-03 9.45E-03 7.59E-03 pCi/m3 0S2 North Gate(522576017) - AC 3-Oct-20 Iodine-131 4.46E-03 1.48E-02 8.15E-03 pCi/m3 0S2 North Gate(524007015) - AC 10-Oct-20 Iodine-131 -3.22E-03 9.23E-03 6.12E-03 pCi/m3 0S2 North Gate(524009008) - AC 17-Oct-20 Iodine-131 3.89E-04 7.56E-03 4.29E-03 pCi/m3 0S2 North Gate(524695013) - AC 24-Oct-20 Iodine-131 1.89E-03 9.78E-03 5.39E-03 pCi/m3 0S2 North Gate(525830015) - AC 31-Oct-20 Iodine-131 3.75E-03 9.78E-03 5.78E-03 pCi/m3 0S2 North Gate(526380008) - AC 7-Nov-20 Iodine-131 -9.61E-04 1.01E-02 6.04E-03 pCi/m3 0S2 North Gate(527613015) - AC 14-Nov-20 Iodine-131 -1.54E-03 6.83E-03 4.36E-03 pCi/m3 0S2 North Gate(527712015) - AC 21-Nov-20 Iodine-131 1.74E-03 1.26E-02 7.20E-03 pCi/m3 0S2 North Gate(528790008) - AC 28-Nov-20 Iodine-131 -8.15E-04 8.42E-03 4.98E-03 pCi/m3 0S2 North Gate(528845017) - AC 5-Dec-20 Iodine-131 1.94E-03 1.62E-02 9.67E-03 pCi/m3 0S2 North Gate(529341015) - AC 12-Dec-20 Iodine-131 2.41E-04 6.19E-03 3.90E-03 pCi/m3 0S2 North Gate(530196017) - AC 19-Dec-20 Iodine-131 -6.13E-04 7.97E-03 4.72E-03 pCi/m3 0S2 North Gate(530951015) - AC 25-Dec-20 Iodine-131 -1.32E-03 8.19E-03 5.05E-03 pCi/m3 0S2 North Gate - Air Carbon-14 Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 0S2 North Gate(500231019) - AC14 4-Jan-20 Carbon-14 8.31E-08 9.99E-08 6.10E-08 uCi/m3 0S2 North Gate(500490010) - AC14 11-Jan-20 Carbon-14 6.12E-08 1.17E-07 7.10E-08 uCi/m3 0S2 North Gate(501031015) - AC14 18-Jan-20 Carbon-14 1.02E-07 1.16E-07 7.12E-08 uCi/m3 0S2 North Gate(502000017) - AC14 25-Jan-20 Carbon-14 1.04E-07 1.23E-07 7.53E-08 uCi/m3 0S2 North Gate(502411015) - AC14 1-Feb-20 Carbon-14 4.88E-08 1.39E-07 8.34E-08 uCi/m3 0S2 North Gate(503155019) - AC14 8-Feb-20 Carbon-14 4.27E-09 1.17E-07 7.00E-08 uCi/m3 0S2 North Gate(503851015) - AC14 15-Feb-20 Carbon-14 1.04E-07 1.32E-07 8.08E-08 uCi/m3 0S2 North Gate(504528015) - AC14 22-Feb-20 Carbon-14 2.10E-08 1.27E-07 7.61E-08 uCi/m3 0S2 North Gate(505332010) - AC14 29-Feb-20 Carbon-14 9.41E-08 1.27E-07 7.72E-08 uCi/m3 0S2 North Gate(505759017) - AC14 7-Mar-20 Carbon-14 2.87E-08 1.43E-07 8.55E-08 uCi/m3 0S2 North Gate(506435017) - AC14 14-Mar-20 Carbon-14 9.99E-08 1.25E-07 7.65E-08 uCi/m3 0S2 North Gate(507015015) - AC14 21-Mar-20 Carbon-14 5.12E-08 1.54E-07 9.26E-08 uCi/m3 0S2 North Gate(507592010) - AC14 27-Mar-20 Carbon-14 6.09E-08 1.22E-07 7.35E-08 uCi/m3 0S2 North Gate(508867015) - AC14 4-Apr-20 Carbon-14 6.12E-08 1.13E-07 6.85E-08 uCi/m3 0S2 North Gate(508984019) - AC14 11-Apr-20 Carbon-14 4.79E-08 1.52E-07 9.16E-08 uCi/m3 0S2 North Gate(509370019) - AC14 18-Apr-20 Carbon-14 -4.73E-10 1.21E-07 7.20E-08 uCi/m3 0S2 North Gate(509745010) - AC14 25-Apr-20 Carbon-14 3.05E-09 1.25E-07 7.43E-08 uCi/m3 0S2 North Gate(510179015) - AC14 2-May-20 Carbon-14 -1.04E-08 1.32E-07 7.85E-08 uCi/m3 0S2 North Gate(510640015) - AC14 9-May-20 Carbon-14 9.12E-08 1.20E-07 7.32E-08 uCi/m3 181

2020 DCPP REMP Analysis Results Appendix A 0S2 North Gate(510747017) - AC14 16-May-20 Carbon-14 7.31E-08 1.32E-07 8.03E-08 uCi/m3 0S2 North Gate(511437015) - AC14 23-May-20 Carbon-14 1.28E-07 1.58E-07 9.68E-08 uCi/m3 0S2 North Gate(512099015) - AC14 30-May-20 Carbon-14 3.93E-08 1.24E-07 7.43E-08 uCi/m3 0S2 North Gate(512380015) - AC14 6-Jun-20 Carbon-14 1.05E-07 1.45E-07 8.85E-08 uCi/m3 0S2 North Gate(513083019) - AC14 13-Jun-20 Carbon-14 1.84E-08 1.25E-07 7.47E-08 uCi/m3 0S2 North Gate(513584015) - AC14 20-Jun-20 Carbon-14 3.04E-08 1.19E-07 7.15E-08 uCi/m3 0S2 North Gate(514894008) - AC14 27-Jun-20 Carbon-14 1.94E-08 1.51E-07 9.01E-08 uCi/m3 0S2 North Gate(514398017) - AC14 4-Jul-20 Carbon-14 -5.71E-08 1.40E-07 8.22E-08 uCi/m3 0S2 North Gate(514716023) - AC14 11-Jul-20 Carbon-14 -3.62E-08 1.54E-07 9.12E-08 uCi/m3 0S2 North Gate(515649019) - AC14 18-Jul-20 Carbon-14 8.87E-08 1.91E-07 1.16E-07 uCi/m3 0S2 North Gate(517082015) - AC14 25-Jul-20 Carbon-14 3.78E-08 1.31E-07 7.90E-08 uCi/m3 0S2 North Gate(516773015) - AC14 1-Aug-20 Carbon-14 1.57E-07 1.67E-07 1.02E-07 uCi/m3 0S2 North Gate(517339040) - AC14 8-Aug-20 Carbon-14 1.30E-07 1.48E-07 9.03E-08 uCi/m3 0S2 North Gate(517997021) - AC14 15-Aug-20 Carbon-14 2.24E-08 1.40E-07 8.39E-08 uCi/m3 0S2 North Gate(518816029) - AC14 22-Aug-20 Carbon-14 7.77E-08 1.37E-07 8.28E-08 uCi/m3 0S2 North Gate(518822027) - AC14 29-Aug-20 Carbon-14 5.29E-08 1.37E-07 8.22E-08 uCi/m3 0S2 North Gate(520288017) - AC14 5-Sep-20 Carbon-14 6.30E-08 1.39E-07 8.41E-08 uCi/m3 0S2 North Gate(520368015) - AC14 12-Sep-20 Carbon-14 1.38E-07 1.49E-07 9.09E-08 uCi/m3 0S2 North Gate(521272015) - AC14 19-Sep-20 Carbon-14 9.54E-08 1.42E-07 8.59E-08 uCi/m3 0S2 North Gate(521863015) - AC14 26-Sep-20 Carbon-14 1.66E-08 1.30E-07 7.75E-08 uCi/m3 0S2 North Gate(522576019) - AC14 3-Oct-20 Carbon-14 -1.62E-08 1.25E-07 7.43E-08 uCi/m3 0S2 North Gate(524007017) - AC14 10-Oct-20 Carbon-14 1.96E-07 2.18E-07 1.31E-07 uCi/m3 0S2 North Gate(524009010) - AC14 17-Oct-20 Carbon-14 2.07E-07 1.28E-07 8.07E-08 uCi/m3 0S2 North Gate(524695015) - AC14 24-Oct-20 Carbon-14 -8.93E-09 1.34E-07 7.98E-08 uCi/m3 0S2 North Gate(525830017) - AC14 31-Oct-20 Carbon-14 1.71E-08 1.28E-07 7.62E-08 uCi/m3 0S2 North Gate(526380010) - AC14 7-Nov-20 Carbon-14 -9.10E-08 1.74E-07 1.02E-07 uCi/m3 0S2 North Gate(527613017) - AC14 14-Nov-20 Carbon-14 -6.09E-08 1.19E-07 6.98E-08 uCi/m3 0S2 North Gate(527712017) - AC14 21-Nov-20 Carbon-14 -9.88E-08 1.55E-07 9.06E-08 uCi/m3 0S2 North Gate(528790010) - AC14 28-Nov-20 Carbon-14 -2.73E-08 1.16E-07 6.87E-08 uCi/m3 0S2 North Gate(528845019) - AC14 5-Dec-20 Carbon-14 -2.04E-08 1.35E-07 8.01E-08 uCi/m3 0S2 North Gate(529341017) - AC14 12-Dec-20 Carbon-14 -1.88E-08 1.36E-07 8.08E-08 uCi/m3 0S2 North Gate(530196019) - AC14 19-Dec-20 Carbon-14 -6.49E-08 1.58E-07 9.29E-08 uCi/m3 0S2 North Gate(530951017) - AC14 25-Dec-20 Carbon-14 -3.59E-08 1.32E-07 7.82E-08 uCi/m3 0S2 North Gate - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 0S2 North Gate(500231018) - AP 4-Jan-20 BETA 2.44E-02 2.32E-03 1.00E-02 pCi/m3 0S2 North Gate(500490009) - AP 11-Jan-20 BETA 6.61E-03 2.17E-03 1.12E-02 pCi/m3 182

2020 DCPP REMP Analysis Results Appendix A 0S2 North Gate(501031014) - AP 18-Jan-20 BETA 1.72E-02 2.20E-03 1.03E-02 pCi/m3 0S2 North Gate(502000016) - AP 25-Jan-20 BETA 1.32E-02 2.25E-03 1.36E-02 pCi/m3 0S2 North Gate(502411014) - AP 1-Feb-20 BETA 1.26E-02 2.15E-03 1.15E-02 pCi/m3 0S2 North Gate(503155016) - AP 8-Feb-20 BETA 1.75E-02 2.18E-03 9.94E-03 pCi/m3 0S2 North Gate(503851014) - AP 15-Feb-20 BETA 3.09E-02 2.13E-03 1.09E-02 pCi/m3 0S2 North Gate(504528014) - AP 22-Feb-20 BETA 3.21E-02 2.08E-03 1.10E-02 pCi/m3 0S2 North Gate(505332009) - AP 29-Feb-20 BETA 2.01E-02 2.15E-03 1.40E-02 pCi/m3 0S2 North Gate(505759016) - AP 7-Mar-20 BETA 1.18E-02 2.21E-03 1.19E-02 pCi/m3 0S2 North Gate(506435016) - AP 14-Mar-20 BETA 1.17E-02 2.16E-03 9.49E-03 pCi/m3 0S2 North Gate(507015014) - AP 21-Mar-20 BETA 1.60E-02 2.70E-03 1.13E-02 pCi/m3 0S2 North Gate(507592009) - AP 27-Mar-20 BETA 1.80E-02 2.17E-03 1.04E-02 pCi/m3 0S2 North Gate(508867014) - AP 4-Apr-20 BETA 9.07E-03 2.28E-03 8.83E-03 pCi/m3 0S2 North Gate(508984018) - AP 11-Apr-20 BETA 7.46E-03 2.65E-03 1.52E-02 pCi/m3 0S2 North Gate(509370018) - AP 18-Apr-20 BETA 1.90E-02 2.17E-03 1.02E-02 pCi/m3 0S2 North Gate(509745009) - AP 25-Apr-20 BETA 1.09E-02 2.50E-03 1.30E-02 pCi/m3 0S2 North Gate(510179014) - AP 2-May-20 BETA 1.26E-02 2.19E-03 1.24E-02 pCi/m3 0S2 North Gate(510640014) - AP 9-May-20 BETA 1.28E-02 2.64E-03 1.13E-02 pCi/m3 0S2 North Gate(510747016) - AP 16-May-20 BETA 1.02E-02 2.59E-03 1.07E-02 pCi/m3 0S2 North Gate(511437014) - AP 23-May-20 BETA 1.05E-02 2.54E-03 1.13E-02 pCi/m3 0S2 North Gate(512099014) - AP 30-May-20 BETA 9.34E-03 1.96E-03 1.03E-02 pCi/m3 0S2 North Gate(512380014) - AP 6-Jun-20 BETA 1.01E-02 2.24E-03 1.08E-02 pCi/m3 0S2 North Gate(513083018) - AP 13-Jun-20 BETA 6.26E-03 2.23E-03 1.06E-02 pCi/m3 0S2 North Gate(513584014) - AP 20-Jun-20 BETA 5.85E-03 2.18E-03 1.12E-02 pCi/m3 0S2 North Gate(514894001) - AP 27-Jun-20 BETA 3.55E-03 2.79E-03 1.25E-02 pCi/m3 0S2 North Gate(514398016) - AP 4-Jul-20 BETA 5.71E-03 1.93E-03 8.49E-03 pCi/m3 0S2 North Gate(514716022) - AP 11-Jul-20 BETA 1.00E-02 2.43E-03 9.98E-03 pCi/m3 0S2 North Gate(515649018) - AP 18-Jul-20 BETA 9.43E-03 2.42E-03 1.26E-02 pCi/m3 0S2 North Gate(517082014) - AP 25-Jul-20 BETA 9.70E-03 2.03E-03 9.32E-03 pCi/m3 0S2 North Gate(516773014) - AP 1-Aug-20 BETA 6.22E-03 2.21E-03 1.01E-02 pCi/m3 0S2 North Gate(517339039) - AP 8-Aug-20 BETA 1.04E-02 2.30E-03 1.15E-02 pCi/m3 0S2 North Gate(517997018) - AP 15-Aug-20 BETA 1.44E-02 2.30E-03 1.20E-02 pCi/m3 0S2 North Gate(518816028) - AP 22-Aug-20 BETA 7.52E-03 2.84E-03 1.31E-02 pCi/m3 0S2 North Gate(518822026) - AP 29-Aug-20 BETA 1.47E-02 2.21E-03 1.01E-02 pCi/m3 0S2 North Gate(520288016) - AP 5-Sep-20 BETA 2.61E-02 2.34E-03 1.05E-02 pCi/m3 0S2 North Gate(520368014) - AP 12-Sep-20 BETA 2.51E-02 3.00E-03 1.63E-02 pCi/m3 0S2 North Gate(521272014) - AP 19-Sep-20 BETA 9.38E-03 2.96E-03 1.57E-02 pCi/m3 0S2 North Gate(521863014) - AP 26-Sep-20 BETA 9.27E-03 2.87E-03 1.66E-02 pCi/m3 0S2 North Gate(522576018) - AP 3-Oct-20 BETA 2.90E-02 3.11E-03 1.84E-02 pCi/m3 183

2020 DCPP REMP Analysis Results Appendix A 0S2 North Gate(524007016) - AP 10-Oct-20 BETA 2.33E-02 2.25E-03 1.10E-02 pCi/m3 0S2 North Gate(524009009) - AP 17-Oct-20 BETA 2.76E-02 1.98E-03 1.02E-02 pCi/m3 0S2 North Gate(524695014) - AP 24-Oct-20 BETA 3.96E-02 2.29E-03 1.21E-02 pCi/m3 0S2 North Gate(525830016) - AP 31-Oct-20 BETA 7.49E-02 2.24E-03 1.25E-02 pCi/m3 0S2 North Gate(526380009) - AP 7-Nov-20 BETA 2.57E-02 2.30E-03 1.18E-02 pCi/m3 0S2 North Gate(527613016) - AP 14-Nov-20 BETA 2.39E-02 2.07E-03 1.02E-02 pCi/m3 0S2 North Gate(527712016) - AP 21-Nov-20 BETA 2.69E-02 2.55E-03 1.33E-02 pCi/m3 0S2 North Gate(528790009) - AP 28-Nov-20 BETA 3.33E-02 1.98E-03 9.47E-03 pCi/m3 0S2 North Gate(528845018) - AP 5-Dec-20 BETA 6.45E-02 2.08E-03 1.13E-02 pCi/m3 0S2 North Gate(529341016) - AP 12-Dec-20 BETA 2.37E-02 2.07E-03 1.07E-02 pCi/m3 0S2 North Gate(530196018) - AP 19-Dec-20 BETA 3.14E-02 2.82E-03 1.58E-02 pCi/m3 0S2 North Gate(530951016) - AP 25-Dec-20 BETA 2.90E-02 2.21E-03 1.03E-02 pCi/m3 0S2 North Gate(509974004) - AP 14-Feb-20 Cesium-134 1.63E-04 6.92E-04 3.83E-04 pCi/m3 0S2 North Gate(516372001) - AP 15-May-20 Cesium-134 1.72E-04 7.19E-04 3.92E-04 pCi/m3 0S2 North Gate(525316002) - AP 15-Aug-20 Cesium-134 2.93E-04 8.07E-04 4.54E-04 pCi/m3 0S2 North Gate(532027002) - AP 14-Nov-20 Cesium-134 -5.60E-05 4.23E-04 2.74E-04 pCi/m3 0S2 North Gate(509974004) - AP 14-Feb-20 Cesium-137 2.42E-04 6.42E-04 3.48E-04 pCi/m3 0S2 North Gate(516372001) - AP 15-May-20 Cesium-137 1.39E-04 5.52E-04 3.24E-04 pCi/m3 0S2 North Gate(525316002) - AP 15-Aug-20 Cesium-137 1.44E-04 6.31E-04 3.57E-04 pCi/m3 0S2 North Gate(532027002) - AP 14-Nov-20 Cesium-137 7.94E-05 4.86E-04 2.90E-04 pCi/m3 1A2 Blanchard Spring - Drinking Water Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 BETA 1.11E+00 3.58E+00 2.24E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 BETA 2.52E+00 2.57E+00 1.66E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 BETA 7.40E+00 2.75E+00 2.24E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 BETA 4.17E+00 1.88E+00 1.47E+00 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Barium-140 5.16E+00 9.90E+00 6.10E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Barium-140 -1.31E+00 8.18E+00 4.96E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Barium-140 -2.10E+00 8.89E+00 5.54E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Barium-140 -1.62E+00 8.50E+00 5.41E+00 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Cesium-134 2.52E-01 2.08E+00 1.25E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Cesium-134 -2.07E-01 2.02E+00 1.40E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Cesium-134 1.25E+00 2.25E+00 1.54E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Cesium-134 -2.48E-01 1.57E+00 9.46E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Cesium-137 4.30E-01 1.97E+00 1.31E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Cesium-137 4.28E-01 2.07E+00 1.23E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Cesium-137 -1.13E-01 1.81E+00 1.25E+00 pCi/L 184

2020 DCPP REMP Analysis Results Appendix A 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Cesium-137 -1.04E-01 1.44E+00 8.44E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Cobalt-58 1.43E+00 2.00E+00 1.38E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Cobalt-58 -4.75E-01 1.80E+00 1.15E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Cobalt-58 -1.05E+00 1.99E+00 1.57E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Cobalt-58 7.45E-02 1.46E+00 9.73E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Cobalt-60 -1.10E+00 2.30E+00 2.09E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Cobalt-60 -1.16E-01 2.09E+00 1.24E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Cobalt-60 -2.48E-01 2.18E+00 1.34E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Cobalt-60 7.48E-01 1.62E+00 9.80E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Iodine-131 4.67E-02 8.03E-01 4.70E-01 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Iodine-131 -7.69E-02 5.74E-01 3.36E-01 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Iodine-131 7.20E-02 5.72E-01 3.35E-01 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Iodine-131 -2.59E-01 5.71E-01 3.77E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Iron-55 8.33E+00 6.41E+01 4.78E+01 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Iron-55 -2.28E+00 8.91E+01 6.54E+01 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Iron-55 1.05E+01 5.24E+01 3.42E+01 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Iron-55 4.54E+01 1.19E+02 8.24E+01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Iron-59 -2.00E+00 3.37E+00 2.46E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Iron-59 1.17E-01 3.86E+00 2.22E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Iron-59 1.07E+00 4.25E+00 2.48E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Iron-59 -1.15E+00 2.73E+00 1.82E+00 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Lanthanum-140 7.00E-01 3.17E+00 1.80E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Lanthanum-140 -2.27E-01 2.94E+00 1.78E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Lanthanum-140 -1.05E+00 3.48E+00 2.29E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Lanthanum-140 9.57E-01 3.05E+00 1.75E+00 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Manganese-54 -1.25E-01 2.01E+00 1.24E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Manganese-54 -1.84E-01 1.96E+00 1.21E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Manganese-54 9.96E-01 1.97E+00 1.27E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Manganese-54 -5.89E-01 1.36E+00 8.86E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Nickel-63 1.44E+01 3.00E+01 1.87E+01 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Nickel-63 -2.08E+00 3.26E+01 1.93E+01 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Nickel-63 -9.72E+00 4.20E+01 2.46E+01 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Nickel-63 6.77E+00 2.01E+01 1.23E+01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Niobium-95 1.70E+00 1.70E+00 1.23E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Niobium-95 5.97E-01 2.08E+00 1.38E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Niobium-95 3.36E-01 2.11E+00 1.44E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Niobium-95 3.36E-02 1.50E+00 9.97E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Total Strontium -1.20E-02 8.40E-01 4.99E-01 pCi/L 185

2020 DCPP REMP Analysis Results Appendix A 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Total Strontium 3.09E-01 1.03E+00 6.52E-01 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Total Strontium -6.41E-01 1.26E+00 6.98E-01 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Total Strontium -9.28E-01 1.51E+00 7.48E-01 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Tritium 5.18E+01 2.80E+02 1.70E+02 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Tritium 4.40E+01 2.44E+02 1.48E+02 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Tritium -3.02E+01 3.26E+02 1.92E+02 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Tritium 8.74E+01 3.47E+02 2.12E+02 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Zinc-65 1.47E+00 4.18E+00 2.53E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Zinc-65 -6.85E-01 3.78E+00 2.58E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Zinc-65 5.37E-02 3.91E+00 2.63E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Zinc-65 -7.77E-01 2.90E+00 2.12E+00 pCi/L 1A2 Blanchard Spring(500502006) - DW 14-Jan-20 Zirconium-95 -8.48E-01 3.27E+00 2.09E+00 pCi/L 1A2 Blanchard Spring(508985001) - DW 14-Apr-20 Zirconium-95 -6.74E-01 3.15E+00 1.99E+00 pCi/L 1A2 Blanchard Spring(514713002) - DW 7-Jul-20 Zirconium-95 -1.31E-01 3.57E+00 2.21E+00 pCi/L 1A2 Blanchard Spring(523234001) - DW 6-Oct-20 Zirconium-95 -3.59E-01 2.81E+00 1.68E+00 pCi/L 1S1 Wastewater Pond - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 1S1 Wastewater Pond(500231015) - AC 4-Jan-20 Iodine-131 -3.74E-03 8.09E-03 5.79E-03 pCi/m3 1S1 Wastewater Pond(500490006) - AC 11-Jan-20 Iodine-131 2.72E-03 8.97E-03 4.87E-03 pCi/m3 1S1 Wastewater Pond(501031011) - AC 18-Jan-20 Iodine-131 -8.34E-04 7.76E-03 4.61E-03 pCi/m3 1S1 Wastewater Pond(502000013) - AC 25-Jan-20 Iodine-131 -1.92E-04 7.21E-03 4.32E-03 pCi/m3 1S1 Wastewater Pond(502411011) - AC 1-Feb-20 Iodine-131 2.67E-03 8.23E-03 4.69E-03 pCi/m3 1S1 Wastewater Pond(503155013) - AC 8-Feb-20 Iodine-131 -7.36E-04 7.50E-03 4.90E-03 pCi/m3 1S1 Wastewater Pond(503851011) - AC 15-Feb-20 Iodine-131 1.84E-03 1.07E-02 5.95E-03 pCi/m3 1S1 Wastewater Pond(504528011) - AC 22-Feb-20 Iodine-131 1.90E-03 8.39E-03 4.75E-03 pCi/m3 1S1 Wastewater Pond(505332006) - AC 29-Feb-20 Iodine-131 -1.33E-03 8.54E-03 5.12E-03 pCi/m3 1S1 Wastewater Pond(505759013) - AC 7-Mar-20 Iodine-131 2.08E-04 7.40E-03 4.22E-03 pCi/m3 1S1 Wastewater Pond(506435013) - AC 14-Mar-20 Iodine-131 -1.92E-03 6.25E-03 4.23E-03 pCi/m3 1S1 Wastewater Pond(507015011) - AC 21-Mar-20 Iodine-131 1.83E-03 1.10E-02 6.07E-03 pCi/m3 1S1 Wastewater Pond(507592006) - AC 27-Mar-20 Iodine-131 4.62E-03 8.31E-03 4.53E-03 pCi/m3 1S1 Wastewater Pond(508867011) - AC 4-Apr-20 Iodine-131 1.15E-04 6.64E-03 3.80E-03 pCi/m3 1S1 Wastewater Pond(508984015) - AC 11-Apr-20 Iodine-131 3.71E-03 8.77E-03 4.67E-03 pCi/m3 1S1 Wastewater Pond(509370015) - AC 18-Apr-20 Iodine-131 2.02E-03 9.54E-03 5.38E-03 pCi/m3 1S1 Wastewater Pond(509745006) - AC 25-Apr-20 Iodine-131 1.59E-03 8.72E-03 4.84E-03 pCi/m3 1S1 Wastewater Pond(510179011) - AC 2-May-20 Iodine-131 -5.07E-03 8.17E-03 6.15E-03 pCi/m3 1S1 Wastewater Pond(510640011) - AC 9-May-20 Iodine-131 -3.25E-03 6.92E-03 4.89E-03 pCi/m3 1S1 Wastewater Pond(510747013) - AC 16-May-20 Iodine-131 -2.04E-03 6.87E-03 4.38E-03 pCi/m3 186

2020 DCPP REMP Analysis Results Appendix A 1S1 Wastewater Pond(511437011) - AC 23-May-20 Iodine-131 7.92E-04 9.57E-03 5.40E-03 pCi/m3 1S1 Wastewater Pond(512099011) - AC 30-May-20 Iodine-131 4.27E-03 9.08E-03 4.95E-03 pCi/m3 1S1 Wastewater Pond(512380011) - AC 6-Jun-20 Iodine-131 -3.18E-03 7.78E-03 5.28E-03 pCi/m3 1S1 Wastewater Pond(513083015) - AC 13-Jun-20 Iodine-131 -1.11E-03 5.82E-03 3.58E-03 pCi/m3 1S1 Wastewater Pond(513584011) - AC 20-Jun-20 Iodine-131 -2.60E-03 1.37E-02 8.52E-03 pCi/m3 1S1 Wastewater Pond(514894012) - AC 27-Jun-20 Iodine-131 1.89E-03 8.35E-03 4.55E-03 pCi/m3 1S1 Wastewater Pond(514398013) - AC 4-Jul-20 Iodine-131 3.03E-03 9.23E-03 5.13E-03 pCi/m3 1S1 Wastewater Pond(514716019) - AC 11-Jul-20 Iodine-131 -2.97E-03 9.10E-03 6.02E-03 pCi/m3 1S1 Wastewater Pond(515649015) - AC 18-Jul-20 Iodine-131 3.91E-04 1.34E-02 7.81E-03 pCi/m3 1S1 Wastewater Pond(517082011) - AC 25-Jul-20 Iodine-131 2.22E-03 7.68E-03 4.27E-03 pCi/m3 1S1 Wastewater Pond(516773011) - AC 1-Aug-20 Iodine-131 -2.10E-03 9.56E-03 6.26E-03 pCi/m3 1S1 Wastewater Pond(517339030) - AC 8-Aug-20 Iodine-131 -1.77E-03 6.73E-03 4.44E-03 pCi/m3 1S1 Wastewater Pond(517997015) - AC 15-Aug-20 Iodine-131 3.63E-04 6.60E-03 3.78E-03 pCi/m3 1S1 Wastewater Pond(518816025) - AC 22-Aug-20 Iodine-131 -1.31E-03 1.17E-02 7.01E-03 pCi/m3 1S1 Wastewater Pond(518822023) - AC 29-Aug-20 Iodine-131 1.55E-03 1.18E-02 6.71E-03 pCi/m3 1S1 Wastewater Pond(520288013) - AC 5-Sep-20 Iodine-131 -1.53E-03 8.09E-03 5.08E-03 pCi/m3 1S1 Wastewater Pond(520368011) - AC 12-Sep-20 Iodine-131 3.03E-03 1.97E-02 1.12E-02 pCi/m3 1S1 Wastewater Pond(521272011) - AC 19-Sep-20 Iodine-131 -1.01E-02 2.14E-02 1.46E-02 pCi/m3 1S1 Wastewater Pond(521863011) - AC 26-Sep-20 Iodine-131 -9.17E-03 1.32E-02 1.49E-02 pCi/m3 1S1 Wastewater Pond(522576015) - AC 3-Oct-20 Iodine-131 -2.93E-03 1.56E-02 9.67E-03 pCi/m3 1S1 Wastewater Pond(524007013) - AC 10-Oct-20 Iodine-131 3.95E-03 1.09E-02 6.17E-03 pCi/m3 1S1 Wastewater Pond(524009006) - AC 17-Oct-20 Iodine-131 8.50E-03 1.37E-02 7.71E-03 pCi/m3 1S1 Wastewater Pond(524695011) - AC 24-Oct-20 Iodine-131 1.32E-03 1.27E-02 7.27E-03 pCi/m3 1S1 Wastewater Pond(525830013) - AC 31-Oct-20 Iodine-131 9.19E-03 9.19E-03 7.22E-03 pCi/m3 1S1 Wastewater Pond(526380006) - AC 7-Nov-20 Iodine-131 1.86E-03 1.35E-02 7.66E-03 pCi/m3 1S1 Wastewater Pond(527613013) - AC 14-Nov-20 Iodine-131 1.99E-03 8.66E-03 4.94E-03 pCi/m3 1S1 Wastewater Pond(527712013) - AC 21-Nov-20 Iodine-131 -3.01E-03 1.49E-02 1.02E-02 pCi/m3 1S1 Wastewater Pond(528790006) - AC 28-Nov-20 Iodine-131 -8.37E-04 6.13E-03 3.80E-03 pCi/m3 1S1 Wastewater Pond(528845015) - AC 5-Dec-20 Iodine-131 3.07E-03 1.21E-02 6.71E-03 pCi/m3 1S1 Wastewater Pond(529341013) - AC 12-Dec-20 Iodine-131 1.81E-04 6.93E-03 3.97E-03 pCi/m3 1S1 Wastewater Pond(530196015) - AC 19-Dec-20 Iodine-131 -6.10E-03 5.43E-03 5.29E-03 pCi/m3 1S1 Wastewater Pond(530951013) - AC 25-Dec-20 Iodine-131 -4.51E-03 8.35E-03 6.61E-03 pCi/m3 1S1 Wastewater Pond - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 1S1 Wastewater Pond(500231016) - AP 4-Jan-20 BETA 2.16E-02 1.82E-03 9.68E-03 pCi/m3 1S1 Wastewater Pond(500490007) - AP 11-Jan-20 BETA 6.94E-03 2.06E-03 1.11E-02 pCi/m3 1S1 Wastewater Pond(501031012) - AP 18-Jan-20 BETA 1.80E-02 2.73E-03 1.06E-02 pCi/m3 187

2020 DCPP REMP Analysis Results Appendix A 1S1 Wastewater Pond(502000014) - AP 25-Jan-20 BETA 7.74E-03 2.20E-03 1.39E-02 pCi/m3 1S1 Wastewater Pond(502411012) - AP 1-Feb-20 BETA 1.08E-02 2.03E-03 1.17E-02 pCi/m3 1S1 Wastewater Pond(503155014) - AP 8-Feb-20 BETA 2.22E-02 2.02E-03 1.00E-02 pCi/m3 1S1 Wastewater Pond(503851012) - AP 15-Feb-20 BETA 3.11E-02 2.16E-03 1.09E-02 pCi/m3 1S1 Wastewater Pond(504528012) - AP 22-Feb-20 BETA 3.33E-02 2.33E-03 1.13E-02 pCi/m3 1S1 Wastewater Pond(505332007) - AP 29-Feb-20 BETA 1.80E-02 2.07E-03 1.39E-02 pCi/m3 1S1 Wastewater Pond(505759014) - AP 7-Mar-20 BETA 1.11E-02 2.04E-03 1.17E-02 pCi/m3 1S1 Wastewater Pond(506435014) - AP 14-Mar-20 BETA 1.48E-02 2.01E-03 9.55E-03 pCi/m3 1S1 Wastewater Pond(507015012) - AP 21-Mar-20 BETA 1.80E-02 3.14E-03 1.16E-02 pCi/m3 1S1 Wastewater Pond(507592007) - AP 27-Mar-20 BETA 2.01E-02 2.16E-03 1.05E-02 pCi/m3 1S1 Wastewater Pond(508867012) - AP 4-Apr-20 BETA 9.02E-03 1.96E-03 8.67E-03 pCi/m3 1S1 Wastewater Pond(508984016) - AP 11-Apr-20 BETA 8.91E-03 2.38E-03 1.50E-02 pCi/m3 1S1 Wastewater Pond(509370016) - AP 18-Apr-20 BETA 1.69E-02 1.90E-03 1.01E-02 pCi/m3 1S1 Wastewater Pond(509745007) - AP 25-Apr-20 BETA 9.96E-03 2.22E-03 1.30E-02 pCi/m3 1S1 Wastewater Pond(510179012) - AP 2-May-20 BETA 1.09E-02 2.70E-03 1.21E-02 pCi/m3 1S1 Wastewater Pond(510640012) - AP 9-May-20 BETA 2.13E-02 2.39E-03 1.16E-02 pCi/m3 1S1 Wastewater Pond(510747014) - AP 16-May-20 BETA 8.92E-03 2.27E-03 1.06E-02 pCi/m3 1S1 Wastewater Pond(511437012) - AP 23-May-20 BETA 1.32E-02 2.47E-03 1.13E-02 pCi/m3 1S1 Wastewater Pond(512099012) - AP 30-May-20 BETA 8.99E-03 2.01E-03 1.04E-02 pCi/m3 1S1 Wastewater Pond(512380012) - AP 6-Jun-20 BETA 1.08E-02 2.04E-03 1.06E-02 pCi/m3 1S1 Wastewater Pond(513083016) - AP 13-Jun-20 BETA 7.89E-03 1.96E-03 1.01E-02 pCi/m3 1S1 Wastewater Pond(513584012) - AP 20-Jun-20 BETA 4.43E-03 2.43E-03 1.11E-02 pCi/m3 1S1 Wastewater Pond(514894002) - AP 27-Jun-20 BETA 3.82E-03 2.50E-03 1.28E-02 pCi/m3 1S1 Wastewater Pond(514398014) - AP 4-Jul-20 BETA 7.38E-03 1.95E-03 8.64E-03 pCi/m3 1S1 Wastewater Pond(514716020) - AP 11-Jul-20 BETA 9.37E-03 2.18E-03 1.00E-02 pCi/m3 1S1 Wastewater Pond(515649016) - AP 18-Jul-20 BETA 8.52E-03 2.63E-03 1.36E-02 pCi/m3 1S1 Wastewater Pond(517082012) - AP 25-Jul-20 BETA 1.06E-02 2.27E-03 9.65E-03 pCi/m3 1S1 Wastewater Pond(516773012) - AP 1-Aug-20 BETA 2.86E-03 2.73E-03 1.06E-02 pCi/m3 1S1 Wastewater Pond(517339031) - AP 8-Aug-20 BETA 7.78E-03 2.88E-03 1.18E-02 pCi/m3 1S1 Wastewater Pond(517997016) - AP 15-Aug-20 BETA 1.33E-02 2.32E-03 1.21E-02 pCi/m3 1S1 Wastewater Pond(518816026) - AP 22-Aug-20 BETA 7.42E-03 3.70E-03 1.59E-02 pCi/m3 1S1 Wastewater Pond(518822024) - AP 29-Aug-20 BETA 1.68E-02 2.33E-03 1.03E-02 pCi/m3 1S1 Wastewater Pond(520288014) - AP 5-Sep-20 BETA 2.77E-02 2.60E-03 1.09E-02 pCi/m3 1S1 Wastewater Pond(520368012) - AP 12-Sep-20 BETA 1.99E-02 3.48E-03 1.77E-02 pCi/m3 1S1 Wastewater Pond(521272012) - AP 19-Sep-20 BETA 1.36E-02 3.01E-03 1.60E-02 pCi/m3 1S1 Wastewater Pond(521863012) - AP 26-Sep-20 BETA 8.65E-03 3.08E-03 1.65E-02 pCi/m3 1S1 Wastewater Pond(522576016) - AP 3-Oct-20 BETA 3.02E-02 3.87E-03 2.11E-02 pCi/m3 1S1 Wastewater Pond(524007014) - AP 10-Oct-20 BETA 2.68E-02 2.36E-03 1.15E-02 pCi/m3 188

2020 DCPP REMP Analysis Results Appendix A 1S1 Wastewater Pond(524009007) - AP 17-Oct-20 BETA 2.35E-02 2.36E-03 1.08E-02 pCi/m3 1S1 Wastewater Pond(524695012) - AP 24-Oct-20 BETA 3.85E-02 2.55E-03 1.26E-02 pCi/m3 1S1 Wastewater Pond(525830014) - AP 31-Oct-20 BETA 7.01E-02 2.43E-03 1.26E-02 pCi/m3 1S1 Wastewater Pond(526380007) - AP 7-Nov-20 BETA 2.66E-02 2.52E-03 1.21E-02 pCi/m3 1S1 Wastewater Pond(527613014) - AP 14-Nov-20 BETA 2.75E-02 1.95E-03 1.08E-02 pCi/m3 1S1 Wastewater Pond(527712014) - AP 21-Nov-20 BETA 2.67E-02 2.75E-03 1.32E-02 pCi/m3 1S1 Wastewater Pond(528790007) - AP 28-Nov-20 BETA 3.24E-02 1.86E-03 9.92E-03 pCi/m3 1S1 Wastewater Pond(528845016) - AP 5-Dec-20 BETA 7.99E-02 2.26E-03 1.23E-02 pCi/m3 1S1 Wastewater Pond(529341014) - AP 12-Dec-20 BETA 2.55E-02 2.38E-03 1.21E-02 pCi/m3 1S1 Wastewater Pond(530196016) - AP 19-Dec-20 BETA 2.66E-02 2.56E-03 1.39E-02 pCi/m3 1S1 Wastewater Pond(530951014) - AP 25-Dec-20 BETA 2.28E-02 2.16E-03 1.02E-02 pCi/m3 1S1 Wastewater Pond(509974003) - AP 14-Feb-20 Cesium-134 1.99E-04 7.25E-04 3.81E-04 pCi/m3 1S1 Wastewater Pond(516372002) - AP 15-May-20 Cesium-134 -3.32E-04 5.23E-04 3.91E-04 pCi/m3 1S1 Wastewater Pond(525316003) - AP 15-Aug-20 Cesium-134 1.46E-04 4.31E-04 2.39E-04 pCi/m3 1S1 Wastewater Pond(532027003) - AP 14-Nov-20 Cesium-134 7.95E-05 5.71E-04 3.25E-04 pCi/m3 1S1 Wastewater Pond(509974003) - AP 14-Feb-20 Cesium-137 1.69E-04 6.87E-04 3.58E-04 pCi/m3 1S1 Wastewater Pond(516372002) - AP 15-May-20 Cesium-137 -2.60E-04 4.96E-04 3.63E-04 pCi/m3 1S1 Wastewater Pond(525316003) - AP 15-Aug-20 Cesium-137 4.34E-05 3.69E-04 2.10E-04 pCi/m3 1S1 Wastewater Pond(532027003) - AP 14-Nov-20 Cesium-137 -2.83E-04 3.33E-04 3.19E-04 pCi/m3 2F1 Morro Bay - Market Fish Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Cesium-134 9.40E-01 3.67E+00 2.20E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Cesium-134 9.96E-01 3.76E+00 2.25E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Cesium-134 -3.09E+00 1.69E+01 1.07E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Cesium-134 4.45E+00 1.66E+01 9.75E+00 pCi/kg 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Cesium-137 8.41E+00 2.95E+00 3.82E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Cesium-137 1.40E+01 3.48E+00 3.82E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Cesium-137 -1.48E+01 1.84E+01 1.85E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Cesium-137 -2.91E+00 1.54E+01 1.20E+01 pCi/kg 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Cobalt-58 -1.19E+00 3.12E+00 2.08E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Cobalt-58 -1.67E+00 3.14E+00 2.20E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Cobalt-58 9.05E+00 1.82E+01 1.10E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Cobalt-58 -4.85E+00 1.45E+01 9.51E+00 pCi/kg 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Cobalt-60 9.69E-01 3.69E+00 2.13E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Cobalt-60 4.52E-02 4.08E+00 2.39E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Cobalt-60 3.48E+00 1.98E+01 1.13E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Cobalt-60 -1.19E+01 1.66E+01 1.48E+01 pCi/kg 189

2020 DCPP REMP Analysis Results Appendix A 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Iron-59 -1.46E+00 8.30E+00 4.98E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Iron-59 -6.89E+00 8.57E+00 7.11E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Iron-59 -1.12E+01 3.15E+01 2.17E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Iron-59 -9.70E+00 3.28E+01 2.20E+01 pCi/kg 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Manganese-54 1.15E+00 3.41E+00 2.06E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Manganese-54 3.58E-01 3.73E+00 2.25E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Manganese-54 1.34E+01 1.76E+01 1.62E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Manganese-54 1.94E+00 1.35E+01 7.99E+00 pCi/kg 2F1 Morro Bay(509770005) - FH Market 13-Apr-20 Zinc-65 3.05E-01 8.24E+00 4.77E+00 pCi/kg 2F1 Morro Bay(511002001) - FH Market 14-May-20 Zinc-65 2.22E-01 8.81E+00 5.10E+00 pCi/kg 2F1 Morro Bay(517473002) - FH Market 30-Jul-20 Zinc-65 -1.11E+00 3.87E+01 2.41E+01 pCi/kg 2F1 Morro Bay(523223005) - FH Market 27-Oct-20 Zinc-65 -9.10E+00 3.64E+01 2.39E+01 pCi/kg 3C1 Household Garden - Vegetation Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 3C1 Household Garden(504709001) - VG Brdleaf 27-Feb-20 Cesium-134 6.66E+00 1.45E+01 8.53E+00 pCi/kg 3C1 Household Garden(510173002) - VG Brdleaf 30-Apr-20 Cesium-134 1.65E-01 9.18E+00 5.41E+00 pCi/kg 3C1 Household Garden(515133002) - VG Brdleaf 16-Jul-20 Cesium-134 1.62E+00 1.10E+01 6.57E+00 pCi/kg 3C1 Household Garden(524337002) - VG Brdleaf 22-Oct-20 Cesium-134 -7.94E-01 5.33E+00 3.21E+00 pCi/kg 3C1 Household Garden(525421001) - VG Brdleaf 26-Oct-20 Cesium-134 -1.46E+00 9.38E+00 5.84E+00 pCi/kg 3C1 Household Garden(504709001) - VG Brdleaf 27-Feb-20 Cesium-137 5.39E+00 1.32E+01 8.12E+00 pCi/kg 3C1 Household Garden(510173002) - VG Brdleaf 30-Apr-20 Cesium-137 6.07E-01 8.41E+00 4.87E+00 pCi/kg 3C1 Household Garden(515133002) - VG Brdleaf 16-Jul-20 Cesium-137 4.50E+00 1.08E+01 6.40E+00 pCi/kg 3C1 Household Garden(524337002) - VG Brdleaf 22-Oct-20 Cesium-137 1.82E+00 4.79E+00 2.80E+00 pCi/kg 3C1 Household Garden(525421001) - VG Brdleaf 26-Oct-20 Cesium-137 -3.54E+00 8.32E+00 5.52E+00 pCi/kg 3C1 Household Garden(504709001) - VG Brdleaf 27-Feb-20 Iodine-131 -7.85E+00 1.86E+01 1.21E+01 pCi/kg 3C1 Household Garden(510173002) - VG Brdleaf 30-Apr-20 Iodine-131 -2.83E+00 1.17E+01 7.36E+00 pCi/kg 3C1 Household Garden(515133002) - VG Brdleaf 16-Jul-20 Iodine-131 -6.41E+00 1.74E+01 1.09E+01 pCi/kg 3C1 Household Garden(524337002) - VG Brdleaf 22-Oct-20 Iodine-131 -4.81E+00 6.31E+00 4.65E+00 pCi/kg 3C1 Household Garden(525421001) - VG Brdleaf 26-Oct-20 Iodine-131 2.98E+00 1.04E+01 5.97E+00 pCi/kg 3C1 Household Garden - Fruit Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 3C1 Household Garden(504709003) - VG Fruit 27-Feb-20 Cesium-134 -6.16E-01 4.70E+00 2.80E+00 pCi/kg 3C1 Household Garden(510173003) - VG Fruit 30-Apr-20 Cesium-134 1.46E+00 6.55E+00 3.89E+00 pCi/kg 3C1 Household Garden(515133003) - VG Fruit 16-Jul-20 Cesium-134 4.16E-01 5.90E+00 3.60E+00 pCi/kg 3C1 Household Garden(524337003) - VG Fruit 22-Oct-20 Cesium-134 2.34E+00 6.17E+00 3.72E+00 pCi/kg 3C1 Household Garden(525421002) - VG Fruit 26-Oct-20 Cesium-134 3.77E-01 4.95E+00 3.00E+00 pCi/kg 190

2020 DCPP REMP Analysis Results Appendix A 3C1 Household Garden(504709003) - VG Fruit 27-Feb-20 Cesium-137 4.29E-01 4.89E+00 2.99E+00 pCi/kg 3C1 Household Garden(510173003) - VG Fruit 30-Apr-20 Cesium-137 1.45E-01 6.74E+00 4.04E+00 pCi/kg 3C1 Household Garden(515133003) - VG Fruit 16-Jul-20 Cesium-137 2.46E+00 5.33E+00 3.20E+00 pCi/kg 3C1 Household Garden(524337003) - VG Fruit 22-Oct-20 Cesium-137 1.00E+00 5.17E+00 3.06E+00 pCi/kg 3C1 Household Garden(525421002) - VG Fruit 26-Oct-20 Cesium-137 -6.02E-01 4.90E+00 3.03E+00 pCi/kg 3C1 Household Garden(504709003) - VG Fruit 27-Feb-20 Iodine-131 2.84E+00 8.01E+00 4.82E+00 pCi/kg 3C1 Household Garden(510173003) - VG Fruit 30-Apr-20 Iodine-131 -2.19E+00 1.13E+01 6.70E+00 pCi/kg 3C1 Household Garden(515133003) - VG Fruit 16-Jul-20 Iodine-131 -8.36E-01 9.15E+00 5.36E+00 pCi/kg 3C1 Household Garden(524337003) - VG Fruit 22-Oct-20 Iodine-131 1.72E+00 7.69E+00 4.41E+00 pCi/kg 3C1 Household Garden(525421002) - VG Fruit 26-Oct-20 Iodine-131 6.28E-01 6.13E+00 3.56E+00 pCi/kg 5F1 SLO OEL - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 5F1 SLO OEL(500231001) - AC 4-Jan-20 Iodine-131 -3.69E-03 7.33E-03 5.32E-03 pCi/m3 5F1 SLO OEL(500490015) - AC 11-Jan-20 Iodine-131 -9.22E-05 7.46E-03 4.29E-03 pCi/m3 5F1 SLO OEL(501031001) - AC 18-Jan-20 Iodine-131 -1.19E-03 8.20E-03 5.02E-03 pCi/m3 5F1 SLO OEL(502000001) - AC 25-Jan-20 Iodine-131 2.99E-03 8.21E-03 4.42E-03 pCi/m3 5F1 SLO OEL(502411001) - AC 1-Feb-20 Iodine-131 5.89E-04 9.65E-03 5.63E-03 pCi/m3 5F1 SLO OEL(503155001) - AC 8-Feb-20 Iodine-131 1.29E-03 8.38E-03 4.85E-03 pCi/m3 5F1 SLO OEL(503851001) - AC 15-Feb-20 Iodine-131 1.68E-03 8.22E-03 4.95E-03 pCi/m3 5F1 SLO OEL(504528001) - AC 22-Feb-20 Iodine-131 2.78E-03 1.10E-02 6.18E-03 pCi/m3 5F1 SLO OEL(505332015) - AC 29-Feb-20 Iodine-131 3.54E-03 8.71E-03 4.86E-03 pCi/m3 5F1 SLO OEL(505759001) - AC 7-Mar-20 Iodine-131 4.19E-03 1.14E-02 6.48E-03 pCi/m3 5F1 SLO OEL(506435001) - AC 14-Mar-20 Iodine-131 7.70E-03 8.88E-03 1.89E-02 pCi/m3 5F1 SLO OEL(507015001) - AC 21-Mar-20 Iodine-131 5.73E-04 1.05E-02 5.94E-03 pCi/m3 5F1 SLO OEL(507592015) - AC 27-Mar-20 Iodine-131 1.44E-03 6.49E-03 3.49E-03 pCi/m3 5F1 SLO OEL(508867001) - AC 4-Apr-20 Iodine-131 -2.42E-03 6.25E-03 4.24E-03 pCi/m3 5F1 SLO OEL(508984001) - AC 11-Apr-20 Iodine-131 -3.03E-03 1.11E-02 7.29E-03 pCi/m3 5F1 SLO OEL(509370001) - AC 18-Apr-20 Iodine-131 -5.93E-04 7.34E-03 4.44E-03 pCi/m3 5F1 SLO OEL(509745001) - AC 25-Apr-20 Iodine-131 6.71E-03 6.71E-03 6.55E-03 pCi/m3 5F1 SLO OEL(510179001) - AC 2-May-20 Iodine-131 -1.24E-03 7.08E-03 4.36E-03 pCi/m3 5F1 SLO OEL(510640001) - AC 9-May-20 Iodine-131 -6.67E-04 4.84E-03 2.96E-03 pCi/m3 5F1 SLO OEL(510747001) - AC 16-May-20 Iodine-131 3.95E-03 1.02E-02 5.76E-03 pCi/m3 5F1 SLO OEL(511437001) - AC 23-May-20 Iodine-131 -7.53E-03 9.76E-03 7.41E-03 pCi/m3 5F1 SLO OEL(512099001) - AC 30-May-20 Iodine-131 1.64E-03 7.76E-03 4.88E-03 pCi/m3 5F1 SLO OEL(512380001) - AC 6-Jun-20 Iodine-131 -2.92E-03 8.07E-03 5.40E-03 pCi/m3 5F1 SLO OEL(513083001) - AC 13-Jun-20 Iodine-131 -2.21E-03 5.74E-03 3.94E-03 pCi/m3 5F1 SLO OEL(513584001) - AC 20-Jun-20 Iodine-131 -8.28E-03 1.33E-02 9.84E-03 pCi/m3 191

2020 DCPP REMP Analysis Results Appendix A 5F1 SLO OEL(514894013) - AC 27-Jun-20 Iodine-131 5.88E-03 1.05E-02 5.86E-03 pCi/m3 5F1 SLO OEL(514398001) - AC 4-Jul-20 Iodine-131 7.26E-04 6.63E-03 3.69E-03 pCi/m3 5F1 SLO OEL(514716001) - AC 11-Jul-20 Iodine-131 1.38E-03 1.10E-02 6.30E-03 pCi/m3 5F1 SLO OEL(515649001) - AC 18-Jul-20 Iodine-131 -7.21E-03 1.35E-02 9.79E-03 pCi/m3 5F1 SLO OEL(517082001) - AC 25-Jul-20 Iodine-131 -1.41E-03 7.92E-03 5.10E-03 pCi/m3 5F1 SLO OEL(516773001) - AC 1-Aug-20 Iodine-131 3.05E-03 1.04E-02 5.72E-03 pCi/m3 5F1 SLO OEL(517339001) - AC 8-Aug-20 Iodine-131 1.06E-03 6.99E-03 3.89E-03 pCi/m3 5F1 SLO OEL(517997001) - AC 15-Aug-20 Iodine-131 -6.84E-04 9.23E-03 5.58E-03 pCi/m3 5F1 SLO OEL(518816001) - AC 22-Aug-20 Iodine-131 -9.24E-04 7.40E-03 4.58E-03 pCi/m3 5F1 SLO OEL(518822001) - AC 29-Aug-20 Iodine-131 1.16E-03 1.32E-02 7.59E-03 pCi/m3 5F1 SLO OEL(520288001) - AC 5-Sep-20 Iodine-131 -7.67E-03 1.27E-02 9.31E-03 pCi/m3 5F1 SLO OEL(520368001) - AC 12-Sep-20 Iodine-131 -1.55E-04 7.30E-03 4.26E-03 pCi/m3 5F1 SLO OEL(521272001) - AC 19-Sep-20 Iodine-131 5.47E-03 1.57E-02 1.22E-02 pCi/m3 5F1 SLO OEL(521863001) - AC 26-Sep-20 Iodine-131 -6.24E-03 1.32E-02 9.16E-03 pCi/m3 5F1 SLO OEL(522576001) - AC 3-Oct-20 Iodine-131 6.52E-03 1.23E-02 1.18E-02 pCi/m3 5F1 SLO OEL(524007001) - AC 10-Oct-20 Iodine-131 1.64E-03 1.69E-02 9.40E-03 pCi/m3 5F1 SLO OEL(524009015) - AC 17-Oct-20 Iodine-131 -2.79E-03 8.81E-03 5.78E-03 pCi/m3 5F1 SLO OEL(524695001) - AC 24-Oct-20 Iodine-131 -6.17E-04 8.04E-03 4.77E-03 pCi/m3 5F1 SLO OEL(525830001) - AC 31-Oct-20 Iodine-131 4.13E-05 1.72E-02 9.80E-03 pCi/m3 5F1 SLO OEL(526380015) - AC 7-Nov-20 Iodine-131 4.46E-03 1.26E-02 6.96E-03 pCi/m3 5F1 SLO OEL(527613001) - AC 14-Nov-20 Iodine-131 6.54E-03 6.62E-03 4.29E-03 pCi/m3 5F1 SLO OEL(527712001) - AC 21-Nov-20 Iodine-131 2.73E-04 1.18E-02 6.93E-03 pCi/m3 5F1 SLO OEL(528790015) - AC 28-Nov-20 Iodine-131 -2.84E-03 7.71E-03 5.29E-03 pCi/m3 5F1 SLO OEL(528845001) - AC 5-Dec-20 Iodine-131 -3.48E-03 1.26E-02 8.41E-03 pCi/m3 5F1 SLO OEL(529341001) - AC 12-Dec-20 Iodine-131 -4.56E-03 7.29E-03 5.47E-03 pCi/m3 5F1 SLO OEL(530196001) - AC 19-Dec-20 Iodine-131 4.72E-04 9.61E-03 5.59E-03 pCi/m3 5F1 SLO OEL(530951001) - AC 25-Dec-20 Iodine-131 -6.31E-04 8.82E-03 5.35E-03 pCi/m3 5F1 SLO OEL - Air Carbon-14 Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 5F1 SLO OEL(500231007) - AC14 4-Jan-20 Carbon-14 4.68E-08 1.00E-07 6.05E-08 uCi/m3 5F1 SLO OEL(500490017) - AC14 11-Jan-20 Carbon-14 9.02E-08 1.24E-07 7.57E-08 uCi/m3 5F1 SLO OEL(501031003) - AC14 18-Jan-20 Carbon-14 8.60E-08 1.21E-07 7.38E-08 uCi/m3 5F1 SLO OEL(502000003) - AC14 25-Jan-20 Carbon-14 1.08E-07 1.25E-07 7.64E-08 uCi/m3 5F1 SLO OEL(502411003) - AC14 1-Feb-20 Carbon-14 3.17E-08 1.13E-07 6.79E-08 uCi/m3 5F1 SLO OEL(503155005) - AC14 8-Feb-20 Carbon-14 -2.21E-08 1.22E-07 7.19E-08 uCi/m3 5F1 SLO OEL(503851003) - AC14 15-Feb-20 Carbon-14 9.24E-08 1.17E-07 7.14E-08 uCi/m3 5F1 SLO OEL(504528003) - AC14 22-Feb-20 Carbon-14 1.02E-07 1.21E-07 7.37E-08 uCi/m3 192

2020 DCPP REMP Analysis Results Appendix A 5F1 SLO OEL(505332017) - AC14 29-Feb-20 Carbon-14 1.16E-07 1.45E-07 8.83E-08 uCi/m3 5F1 SLO OEL(505759005) - AC14 7-Mar-20 Carbon-14 1.23E-07 1.35E-07 8.25E-08 uCi/m3 5F1 SLO OEL(506435003) - AC14 14-Mar-20 Carbon-14 2.53E-08 1.38E-07 8.28E-08 uCi/m3 5F1 SLO OEL(507015003) - AC14 21-Mar-20 Carbon-14 1.25E-07 1.42E-07 8.73E-08 uCi/m3 5F1 SLO OEL(507592017) - AC14 27-Mar-20 Carbon-14 5.54E-08 1.18E-07 7.13E-08 uCi/m3 5F1 SLO OEL(508867003) - AC14 4-Apr-20 Carbon-14 7.80E-08 1.15E-07 7.02E-08 uCi/m3 5F1 SLO OEL(508984005) - AC14 11-Apr-20 Carbon-14 1.91E-08 1.65E-07 9.87E-08 uCi/m3 5F1 SLO OEL(509370005) - AC14 18-Apr-20 Carbon-14 6.11E-08 1.06E-07 6.43E-08 uCi/m3 5F1 SLO OEL(509745003) - AC14 25-Apr-20 Carbon-14 -9.71E-08 1.45E-07 8.45E-08 uCi/m3 5F1 SLO OEL(510179003) - AC14 2-May-20 Carbon-14 7.45E-08 1.25E-07 7.60E-08 uCi/m3 5F1 SLO OEL(510640003) - AC14 9-May-20 Carbon-14 1.06E-07 1.25E-07 7.62E-08 uCi/m3 5F1 SLO OEL(510747003) - AC14 16-May-20 Carbon-14 8.94E-08 1.20E-07 7.31E-08 uCi/m3 5F1 SLO OEL(511437003) - AC14 23-May-20 Carbon-14 6.62E-08 1.59E-07 9.61E-08 uCi/m3 5F1 SLO OEL(512099003) - AC14 30-May-20 Carbon-14 8.45E-08 1.08E-07 6.60E-08 uCi/m3 5F1 SLO OEL(512380003) - AC14 6-Jun-20 Carbon-14 5.23E-08 1.42E-07 8.57E-08 uCi/m3 5F1 SLO OEL(513083005) - AC14 13-Jun-20 Carbon-14 5.45E-08 1.27E-07 7.67E-08 uCi/m3 5F1 SLO OEL(513584003) - AC14 20-Jun-20 Carbon-14 1.14E-07 1.24E-07 7.60E-08 uCi/m3 5F1 SLO OEL(514894009) - AC14 27-Jun-20 Carbon-14 9.09E-08 1.53E-07 9.27E-08 uCi/m3 5F1 SLO OEL(514398003) - AC14 4-Jul-20 Carbon-14 5.72E-08 1.18E-07 7.13E-08 uCi/m3 5F1 SLO OEL(514716011) - AC14 11-Jul-20 Carbon-14 9.95E-10 1.44E-07 8.56E-08 uCi/m3 5F1 SLO OEL(515649005) - AC14 18-Jul-20 Carbon-14 -4.03E-08 1.39E-07 8.18E-08 uCi/m3 5F1 SLO OEL(517082003) - AC14 25-Jul-20 Carbon-14 -4.69E-08 1.22E-07 7.19E-08 uCi/m3 5F1 SLO OEL(516773003) - AC14 1-Aug-20 Carbon-14 1.13E-07 1.37E-07 8.32E-08 uCi/m3 5F1 SLO OEL(517339019) - AC14 8-Aug-20 Carbon-14 1.53E-07 1.54E-07 9.41E-08 uCi/m3 5F1 SLO OEL(517997005) - AC14 15-Aug-20 Carbon-14 -6.38E-08 1.27E-07 7.48E-08 uCi/m3 5F1 SLO OEL(518816015) - AC14 22-Aug-20 Carbon-14 -8.65E-08 1.30E-07 7.61E-08 uCi/m3 5F1 SLO OEL(518822015) - AC14 29-Aug-20 Carbon-14 6.51E-08 1.35E-07 8.12E-08 uCi/m3 5F1 SLO OEL(520288003) - AC14 5-Sep-20 Carbon-14 9.50E-09 1.31E-07 7.84E-08 uCi/m3 5F1 SLO OEL(520368003) - AC14 12-Sep-20 Carbon-14 2.34E-09 1.31E-07 7.83E-08 uCi/m3 5F1 SLO OEL(521272003) - AC14 19-Sep-20 Carbon-14 8.19E-08 1.37E-07 8.30E-08 uCi/m3 5F1 SLO OEL(521863003) - AC14 26-Sep-20 Carbon-14 -6.71E-08 1.27E-07 7.44E-08 uCi/m3 5F1 SLO OEL(522576005) - AC14 3-Oct-20 Carbon-14 4.42E-08 1.26E-07 7.56E-08 uCi/m3 5F1 SLO OEL(524007005) - AC14 10-Oct-20 Carbon-14 1.74E-07 2.39E-07 1.44E-07 uCi/m3 5F1 SLO OEL(524009017) - AC14 17-Oct-20 Carbon-14 8.25E-08 2.12E-07 1.27E-07 uCi/m3 5F1 SLO OEL(524695003) - AC14 24-Oct-20 Carbon-14 -1.12E-09 1.30E-07 7.76E-08 uCi/m3 5F1 SLO OEL(525830003) - AC14 31-Oct-20 Carbon-14 3.00E-08 1.29E-07 7.75E-08 uCi/m3 5F1 SLO OEL(526380017) - AC14 7-Nov-20 Carbon-14 -4.94E-08 1.54E-07 9.07E-08 uCi/m3 5F1 SLO OEL(527613003) - AC14 14-Nov-20 Carbon-14 -9.04E-08 1.16E-07 6.75E-08 uCi/m3 193

2020 DCPP REMP Analysis Results Appendix A 5F1 SLO OEL(527712003) - AC14 21-Nov-20 Carbon-14 -3.78E-08 1.60E-07 9.44E-08 uCi/m3 5F1 SLO OEL(528790017) - AC14 28-Nov-20 Carbon-14 -9.06E-09 1.11E-07 6.61E-08 uCi/m3 5F1 SLO OEL(528845005) - AC14 5-Dec-20 Carbon-14 -6.50E-08 1.35E-07 7.96E-08 uCi/m3 5F1 SLO OEL(529341003) - AC14 12-Dec-20 Carbon-14 7.19E-09 1.31E-07 7.81E-08 uCi/m3 5F1 SLO OEL(530196005) - AC14 19-Dec-20 Carbon-14 1.28E-08 1.53E-07 9.14E-08 uCi/m3 5F1 SLO OEL(530951003) - AC14 25-Dec-20 Carbon-14 -4.52E-08 1.52E-07 8.98E-08 uCi/m3 5F1 SLO OEL - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 5F1 SLO OEL(500231002) - AP 4-Jan-20 BETA 2.98E-02 1.83E-03 9.89E-03 pCi/m3 5F1 SLO OEL(500490016) - AP 11-Jan-20 BETA 7.70E-03 2.07E-03 1.12E-02 pCi/m3 5F1 SLO OEL(501031002) - AP 18-Jan-20 BETA 2.39E-02 2.71E-03 1.07E-02 pCi/m3 5F1 SLO OEL(502000002) - AP 25-Jan-20 BETA 1.93E-02 2.35E-03 1.43E-02 pCi/m3 5F1 SLO OEL(502411002) - AP 1-Feb-20 BETA 1.32E-02 2.03E-03 1.17E-02 pCi/m3 5F1 SLO OEL(503155002) - AP 8-Feb-20 BETA 2.29E-02 2.06E-03 1.02E-02 pCi/m3 5F1 SLO OEL(503851002) - AP 15-Feb-20 BETA 2.76E-02 2.25E-03 1.13E-02 pCi/m3 5F1 SLO OEL(504528002) - AP 22-Feb-20 BETA 3.76E-02 2.31E-03 1.13E-02 pCi/m3 5F1 SLO OEL(505332016) - AP 29-Feb-20 BETA 2.49E-02 2.14E-03 1.44E-02 pCi/m3 5F1 SLO OEL(505759002) - AP 7-Mar-20 BETA 1.56E-02 2.04E-03 1.18E-02 pCi/m3 5F1 SLO OEL(506435002) - AP 14-Mar-20 BETA 1.55E-02 2.28E-03 9.61E-03 pCi/m3 5F1 SLO OEL(507015002) - AP 21-Mar-20 BETA 1.54E-02 3.13E-03 1.15E-02 pCi/m3 5F1 SLO OEL(507592016) - AP 27-Mar-20 BETA 1.90E-02 2.14E-03 1.04E-02 pCi/m3 5F1 SLO OEL(508867002) - AP 4-Apr-20 BETA 1.16E-02 1.98E-03 8.84E-03 pCi/m3 5F1 SLO OEL(508984002) - AP 11-Apr-20 BETA 9.29E-03 2.93E-03 1.55E-02 pCi/m3 5F1 SLO OEL(509370002) - AP 18-Apr-20 BETA 1.51E-02 1.98E-03 1.03E-02 pCi/m3 5F1 SLO OEL(509745002) - AP 25-Apr-20 BETA 1.62E-02 2.49E-03 1.33E-02 pCi/m3 5F1 SLO OEL(510179002) - AP 2-May-20 BETA 8.81E-03 2.62E-03 1.22E-02 pCi/m3 5F1 SLO OEL(510640002) - AP 9-May-20 BETA 2.73E-02 2.39E-03 1.18E-02 pCi/m3 5F1 SLO OEL(510747002) - AP 16-May-20 BETA 1.06E-02 2.13E-03 1.06E-02 pCi/m3 5F1 SLO OEL(511437002) - AP 23-May-20 BETA 1.29E-02 2.51E-03 1.15E-02 pCi/m3 5F1 SLO OEL(512099002) - AP 30-May-20 BETA 9.06E-03 1.98E-03 1.03E-02 pCi/m3 5F1 SLO OEL(512380002) - AP 6-Jun-20 BETA 1.02E-02 2.14E-03 1.11E-02 pCi/m3 5F1 SLO OEL(513083002) - AP 13-Jun-20 BETA 1.11E-02 2.18E-03 1.07E-02 pCi/m3 5F1 SLO OEL(513584002) - AP 20-Jun-20 BETA 7.43E-03 2.47E-03 1.14E-02 pCi/m3 5F1 SLO OEL(514894003) - AP 27-Jun-20 BETA 4.58E-03 2.98E-03 1.27E-02 pCi/m3 5F1 SLO OEL(514398002) - AP 4-Jul-20 BETA 1.21E-02 2.04E-03 8.48E-03 pCi/m3 5F1 SLO OEL(514716002) - AP 11-Jul-20 BETA 1.26E-02 2.15E-03 9.95E-03 pCi/m3 5F1 SLO OEL(515649002) - AP 18-Jul-20 BETA 7.77E-03 2.55E-03 1.25E-02 pCi/m3 194

2020 DCPP REMP Analysis Results Appendix A 5F1 SLO OEL(517082002) - AP 25-Jul-20 BETA 9.58E-03 2.18E-03 9.27E-03 pCi/m3 5F1 SLO OEL(516773002) - AP 1-Aug-20 BETA 6.28E-03 2.62E-03 1.03E-02 pCi/m3 5F1 SLO OEL(517339002) - AP 8-Aug-20 BETA 1.03E-02 2.77E-03 1.14E-02 pCi/m3 5F1 SLO OEL(517997002) - AP 15-Aug-20 BETA 1.99E-02 2.25E-03 1.19E-02 pCi/m3 5F1 SLO OEL(518816002) - AP 22-Aug-20 BETA 1.76E-02 2.83E-03 1.24E-02 pCi/m3 5F1 SLO OEL(518822002) - AP 29-Aug-20 BETA 1.41E-02 2.46E-03 1.08E-02 pCi/m3 5F1 SLO OEL(520288002) - AP 5-Sep-20 BETA 3.31E-02 2.51E-03 1.07E-02 pCi/m3 5F1 SLO OEL(520368002) - AP 12-Sep-20 BETA 3.08E-02 2.46E-03 1.29E-02 pCi/m3 5F1 SLO OEL(521272002) - AP 19-Sep-20 BETA 1.15E-02 2.95E-03 1.57E-02 pCi/m3 5F1 SLO OEL(521863002) - AP 26-Sep-20 BETA 1.23E-02 3.07E-03 1.65E-02 pCi/m3 5F1 SLO OEL(522576002) - AP 3-Oct-20 BETA 3.88E-02 3.19E-03 1.77E-02 pCi/m3 5F1 SLO OEL(524007002) - AP 10-Oct-20 BETA 2.39E-02 2.26E-03 1.10E-02 pCi/m3 5F1 SLO OEL(524009016) - AP 17-Oct-20 BETA 3.56E-02 2.23E-03 1.05E-02 pCi/m3 5F1 SLO OEL(524695002) - AP 24-Oct-20 BETA 3.43E-02 2.44E-03 1.20E-02 pCi/m3 5F1 SLO OEL(525830002) - AP 31-Oct-20 BETA 8.04E-02 1.93E-03 1.28E-02 pCi/m3 5F1 SLO OEL(526380016) - AP 7-Nov-20 BETA 3.33E-02 2.43E-03 1.18E-02 pCi/m3 5F1 SLO OEL(527613002) - AP 14-Nov-20 BETA 3.45E-02 2.11E-03 1.06E-02 pCi/m3 5F1 SLO OEL(527712002) - AP 21-Nov-20 BETA 2.59E-02 2.46E-03 1.28E-02 pCi/m3 5F1 SLO OEL(528790016) - AP 28-Nov-20 BETA 6.92E-02 2.04E-03 1.05E-02 pCi/m3 5F1 SLO OEL(528845002) - AP 5-Dec-20 BETA 7.20E-02 2.30E-03 1.20E-02 pCi/m3 5F1 SLO OEL(529341002) - AP 12-Dec-20 BETA 2.41E-02 2.33E-03 1.15E-02 pCi/m3 5F1 SLO OEL(530196002) - AP 19-Dec-20 BETA 3.73E-02 2.54E-03 1.41E-02 pCi/m3 5F1 SLO OEL(530951002) - AP 25-Dec-20 BETA 3.46E-02 2.04E-03 1.05E-02 pCi/m3 5F1 SLO OEL(509974007) - AP 14-Feb-20 Cesium-134 2.28E-04 4.76E-04 2.54E-04 pCi/m3 5F1 SLO OEL(516372003) - AP 15-May-20 Cesium-134 5.68E-05 5.64E-04 3.11E-04 pCi/m3 5F1 SLO OEL(525316001) - AP 15-Aug-20 Cesium-134 1.51E-04 4.72E-04 2.74E-04 pCi/m3 5F1 SLO OEL(532027001) - AP 14-Nov-20 Cesium-134 5.15E-05 6.14E-04 3.65E-04 pCi/m3 5F1 SLO OEL(509974007) - AP 14-Feb-20 Cesium-137 7.69E-05 4.24E-04 2.42E-04 pCi/m3 5F1 SLO OEL(516372003) - AP 15-May-20 Cesium-137 2.27E-05 5.73E-04 3.44E-04 pCi/m3 5F1 SLO OEL(525316001) - AP 15-Aug-20 Cesium-137 -2.47E-05 2.77E-04 1.74E-04 pCi/m3 5F1 SLO OEL(532027001) - AP 14-Nov-20 Cesium-137 5.50E-05 4.81E-04 2.78E-04 pCi/m3 5F2 Cal Poly Farm - Milk Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 5F2 Cal Poly Farm(500370001) - MK 13-Jan-20 Barium-140 -4.65E+00 7.12E+00 4.96E+00 pCi/L 5F2 Cal Poly Farm(502925001) - MK 4-Feb-20 Barium-140 -1.59E+00 6.88E+00 4.32E+00 pCi/L 5F2 Cal Poly Farm(505216001) - MK 2-Mar-20 Barium-140 -2.89E+00 9.99E+00 6.41E+00 pCi/L 5F2 Cal Poly Farm(508084001) - MK 6-Apr-20 Barium-140 -4.18E+00 6.39E+00 4.49E+00 pCi/L 195

2020 DCPP REMP Analysis Results Appendix A 5F2 Cal Poly Farm(510659004) - MK 4-May-20 Barium-140 8.42E-01 9.80E+00 6.01E+00 pCi/L 5F2 Cal Poly Farm(512048001) - MK 1-Jun-20 Barium-140 -1.79E+00 1.21E+01 7.30E+00 pCi/L 5F2 Cal Poly Farm(514203001) - MK 6-Jul-20 Barium-140 2.02E-01 8.02E+00 4.76E+00 pCi/L 5F2 Cal Poly Farm(517958001) - MK 11-Aug-20 Barium-140 1.68E+00 9.07E+00 7.63E+00 pCi/L 5F2 Cal Poly Farm(518806001) - MK 13-Aug-20 Barium-140 -5.17E-01 9.03E+00 5.31E+00 pCi/L 5F2 Cal Poly Farm(520364001) - MK 8-Sep-20 Barium-140 -1.37E-01 7.87E+00 4.71E+00 pCi/L 5F2 Cal Poly Farm(521275001) - MK 10-Sep-20 Barium-140 2.56E+00 8.33E+00 4.88E+00 pCi/L 5F2 Cal Poly Farm(516774001) - MK 13-Oct-20 Barium-140 -1.58E-01 8.52E+00 5.27E+00 pCi/L 5F2 Cal Poly Farm(523224001) - MK 2-Nov-20 Barium-140 -5.15E+00 1.19E+01 7.69E+00 pCi/L 5F2 Cal Poly Farm(528798001) - MK 1-Dec-20 Barium-140 3.61E+00 9.21E+00 5.40E+00 pCi/L 5F2 Cal Poly Farm(500370001) - MK 13-Jan-20 Cesium-134 2.61E-01 1.77E+00 1.06E+00 pCi/L 5F2 Cal Poly Farm(502925001) - MK 4-Feb-20 Cesium-134 2.57E-01 2.04E+00 1.24E+00 pCi/L 5F2 Cal Poly Farm(505216001) - MK 2-Mar-20 Cesium-134 2.32E-01 2.14E+00 1.23E+00 pCi/L 5F2 Cal Poly Farm(508084001) - MK 6-Apr-20 Cesium-134 1.13E+00 2.05E+00 1.61E+00 pCi/L 5F2 Cal Poly Farm(510659004) - MK 4-May-20 Cesium-134 1.77E-01 2.05E+00 1.18E+00 pCi/L 5F2 Cal Poly Farm(512048001) - MK 1-Jun-20 Cesium-134 8.49E-01 2.26E+00 1.37E+00 pCi/L 5F2 Cal Poly Farm(514203001) - MK 6-Jul-20 Cesium-134 -1.68E-01 1.88E+00 1.16E+00 pCi/L 5F2 Cal Poly Farm(517958001) - MK 11-Aug-20 Cesium-134 -5.13E-01 2.11E+00 1.68E+00 pCi/L 5F2 Cal Poly Farm(518806001) - MK 13-Aug-20 Cesium-134 4.36E-01 2.39E+00 1.47E+00 pCi/L 5F2 Cal Poly Farm(520364001) - MK 8-Sep-20 Cesium-134 2.71E-01 1.87E+00 1.13E+00 pCi/L 5F2 Cal Poly Farm(521275001) - MK 10-Sep-20 Cesium-134 3.09E-01 2.14E+00 1.28E+00 pCi/L 5F2 Cal Poly Farm(516774001) - MK 13-Oct-20 Cesium-134 1.05E+00 1.87E+00 1.61E+00 pCi/L 5F2 Cal Poly Farm(523224001) - MK 2-Nov-20 Cesium-134 -4.98E-01 3.00E+00 2.44E+00 pCi/L 5F2 Cal Poly Farm(528798001) - MK 1-Dec-20 Cesium-134 -8.02E-01 1.75E+00 1.16E+00 pCi/L 5F2 Cal Poly Farm(500370001) - MK 13-Jan-20 Cesium-137 9.97E-01 1.70E+00 1.04E+00 pCi/L 5F2 Cal Poly Farm(502925001) - MK 4-Feb-20 Cesium-137 5.36E-01 1.76E+00 1.07E+00 pCi/L 5F2 Cal Poly Farm(505216001) - MK 2-Mar-20 Cesium-137 -4.68E-01 1.89E+00 1.22E+00 pCi/L 5F2 Cal Poly Farm(508084001) - MK 6-Apr-20 Cesium-137 5.52E-01 1.66E+00 2.16E+00 pCi/L 5F2 Cal Poly Farm(510659004) - MK 4-May-20 Cesium-137 1.41E-01 1.89E+00 1.09E+00 pCi/L 5F2 Cal Poly Farm(512048001) - MK 1-Jun-20 Cesium-137 3.01E-01 1.99E+00 1.18E+00 pCi/L 5F2 Cal Poly Farm(514203001) - MK 6-Jul-20 Cesium-137 1.00E+00 1.77E+00 1.10E+00 pCi/L 5F2 Cal Poly Farm(517958001) - MK 11-Aug-20 Cesium-137 7.56E-01 1.91E+00 1.17E+00 pCi/L 5F2 Cal Poly Farm(518806001) - MK 13-Aug-20 Cesium-137 -2.90E-01 2.12E+00 1.29E+00 pCi/L 5F2 Cal Poly Farm(520364001) - MK 8-Sep-20 Cesium-137 -7.00E-02 1.71E+00 1.04E+00 pCi/L 5F2 Cal Poly Farm(521275001) - MK 10-Sep-20 Cesium-137 -2.69E-01 1.96E+00 1.19E+00 pCi/L 5F2 Cal Poly Farm(516774001) - MK 13-Oct-20 Cesium-137 -6.04E-01 1.63E+00 1.02E+00 pCi/L 5F2 Cal Poly Farm(523224001) - MK 2-Nov-20 Cesium-137 1.26E+00 2.76E+00 1.65E+00 pCi/L 5F2 Cal Poly Farm(528798001) - MK 1-Dec-20 Cesium-137 1.29E-01 1.73E+00 1.02E+00 pCi/L 196

2020 DCPP REMP Analysis Results Appendix A 5F2 Cal Poly Farm(500370001) - MK 13-Jan-20 Iodine-131 3.16E-01 9.91E-01 5.75E-01 pCi/L 5F2 Cal Poly Farm(502925001) - MK 4-Feb-20 Iodine-131 1.54E-01 9.77E-01 5.65E-01 pCi/L 5F2 Cal Poly Farm(505216001) - MK 2-Mar-20 Iodine-131 2.98E-01 6.86E-01 4.11E-01 pCi/L 5F2 Cal Poly Farm(508084001) - MK 6-Apr-20 Iodine-131 -3.62E-01 7.92E-01 5.05E-01 pCi/L 5F2 Cal Poly Farm(510659004) - MK 4-May-20 Iodine-131 1.34E-01 5.86E-01 3.35E-01 pCi/L 5F2 Cal Poly Farm(512048001) - MK 1-Jun-20 Iodine-131 2.56E-01 7.78E-01 4.69E-01 pCi/L 5F2 Cal Poly Farm(514203001) - MK 6-Jul-20 Iodine-131 -8.92E-02 7.40E-01 4.32E-01 pCi/L 5F2 Cal Poly Farm(517958001) - MK 11-Aug-20 Iodine-131 -2.57E-02 6.07E-01 3.61E-01 pCi/L 5F2 Cal Poly Farm(518806001) - MK 13-Aug-20 Iodine-131 -2.94E-02 4.62E-01 2.68E-01 pCi/L 5F2 Cal Poly Farm(520364001) - MK 8-Sep-20 Iodine-131 1.32E-01 4.83E-01 2.91E-01 pCi/L 5F2 Cal Poly Farm(521275001) - MK 10-Sep-20 Iodine-131 -5.18E-01 7.75E-01 7.09E-01 pCi/L 5F2 Cal Poly Farm(516774001) - MK 13-Oct-20 Iodine-131 -1.66E-01 9.99E-01 6.04E-01 pCi/L 5F2 Cal Poly Farm(523224001) - MK 2-Nov-20 Iodine-131 6.97E-02 8.02E-01 4.62E-01 pCi/L 5F2 Cal Poly Farm(528798001) - MK 1-Dec-20 Iodine-131 1.53E-01 9.68E-01 5.72E-01 pCi/L 5F2 Cal Poly Farm(500370001) - MK 13-Jan-20 Lanthanum-140 1.85E-01 2.41E+00 1.41E+00 pCi/L 5F2 Cal Poly Farm(502925001) - MK 4-Feb-20 Lanthanum-140 -2.92E-01 1.87E+00 1.17E+00 pCi/L 5F2 Cal Poly Farm(505216001) - MK 2-Mar-20 Lanthanum-140 -1.60E+00 3.02E+00 2.12E+00 pCi/L 5F2 Cal Poly Farm(508084001) - MK 6-Apr-20 Lanthanum-140 5.12E-01 2.33E+00 1.38E+00 pCi/L 5F2 Cal Poly Farm(510659004) - MK 4-May-20 Lanthanum-140 -4.30E-01 2.98E+00 1.85E+00 pCi/L 5F2 Cal Poly Farm(512048001) - MK 1-Jun-20 Lanthanum-140 -3.19E-01 3.78E+00 2.29E+00 pCi/L 5F2 Cal Poly Farm(514203001) - MK 6-Jul-20 Lanthanum-140 5.12E-01 2.64E+00 1.53E+00 pCi/L 5F2 Cal Poly Farm(517958001) - MK 11-Aug-20 Lanthanum-140 -1.50E-01 2.80E+00 1.97E+00 pCi/L 5F2 Cal Poly Farm(518806001) - MK 13-Aug-20 Lanthanum-140 9.12E-01 3.41E+00 2.02E+00 pCi/L 5F2 Cal Poly Farm(520364001) - MK 8-Sep-20 Lanthanum-140 -5.55E-01 2.56E+00 1.62E+00 pCi/L 5F2 Cal Poly Farm(521275001) - MK 10-Sep-20 Lanthanum-140 -3.00E+00 2.01E+00 2.35E+00 pCi/L 5F2 Cal Poly Farm(516774001) - MK 13-Oct-20 Lanthanum-140 -6.24E-01 2.59E+00 2.95E+00 pCi/L 5F2 Cal Poly Farm(523224001) - MK 2-Nov-20 Lanthanum-140 1.54E-01 3.80E+00 2.24E+00 pCi/L 5F2 Cal Poly Farm(528798001) - MK 1-Dec-20 Lanthanum-140 1.40E-01 2.75E+00 1.60E+00 pCi/L 5F2 Cal Poly Farm(500370001) - MK 13-Jan-20 Total Strontium 8.79E-01 1.05E+00 7.28E-01 pCi/L 5F2 Cal Poly Farm(502925001) - MK 4-Feb-20 Total Strontium 8.09E-01 1.22E+00 8.64E-01 pCi/L 5F2 Cal Poly Farm(505216001) - MK 2-Mar-20 Total Strontium 4.92E-01 8.85E-01 5.88E-01 pCi/L 5F2 Cal Poly Farm(508084001) - MK 6-Apr-20 Total Strontium 6.32E-01 1.18E+00 7.74E-01 pCi/L 5F2 Cal Poly Farm(510659004) - MK 4-May-20 Total Strontium 1.56E+00 1.57E+00 1.17E+00 pCi/L 5F2 Cal Poly Farm(512048001) - MK 1-Jun-20 Total Strontium -7.30E-04 6.63E-01 3.95E-01 pCi/L 5F2 Cal Poly Farm(514203001) - MK 6-Jul-20 Total Strontium -2.92E-01 1.08E+00 6.18E-01 pCi/L 5F2 Cal Poly Farm(517958001) - MK 11-Aug-20 Total Strontium -2.43E-01 1.75E+00 1.01E+00 pCi/L 5F2 Cal Poly Farm(518806001) - MK 13-Aug-20 Total Strontium 2.99E-01 1.61E+00 9.97E-01 pCi/L 5F2 Cal Poly Farm(520364001) - MK 8-Sep-20 Total Strontium 2.75E-01 7.78E-01 5.02E-01 pCi/L 197

2020 DCPP REMP Analysis Results Appendix A 5F2 Cal Poly Farm(521275001) - MK 10-Sep-20 Total Strontium 1.50E-01 6.62E-01 4.10E-01 pCi/L 5F2 Cal Poly Farm(516774001) - MK 13-Oct-20 Total Strontium 1.74E-01 1.06E+00 6.43E-01 pCi/L 5F2 Cal Poly Farm(523224001) - MK 2-Nov-20 Total Strontium 5.09E-01 1.16E+00 7.75E-01 pCi/L 5F2 Cal Poly Farm(528798001) - MK 1-Dec-20 Total Strontium 4.01E-01 1.24E+00 8.03E-01 pCi/L 5F2 Cal Poly Farm - Vegetation Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 5F2 Cal Poly Farm(500489001) - VG Brdleaf 13-Jan-20 Cesium-134 1.60E+00 1.44E+01 8.27E+00 pCi/kg 5F2 Cal Poly Farm(502413001) - VG Brdleaf 4-Feb-20 Cesium-134 -6.23E-01 1.09E+01 6.82E+00 pCi/kg 5F2 Cal Poly Farm(505216002) - VG Brdleaf 2-Mar-20 Cesium-134 1.44E+00 8.11E+00 4.61E+00 pCi/kg 5F2 Cal Poly Farm(508084002) - VG Brdleaf 6-Apr-20 Cesium-134 6.16E-01 1.50E+01 8.96E+00 pCi/kg 5F2 Cal Poly Farm(510659001) - VG Brdleaf 4-May-20 Cesium-134 -4.78E+00 1.05E+01 7.24E+00 pCi/kg 5F2 Cal Poly Farm(512048002) - VG Brdleaf 1-Jun-20 Cesium-134 1.87E+00 1.28E+01 7.64E+00 pCi/kg 5F2 Cal Poly Farm(514203002) - VG Brdleaf 6-Jul-20 Cesium-134 -4.33E+00 8.75E+00 6.08E+00 pCi/kg 5F2 Cal Poly Farm(517958003) - VG Brdleaf 11-Aug-20 Cesium-134 5.04E+00 1.64E+01 9.37E+00 pCi/kg 5F2 Cal Poly Farm(520363001) - VG Brdleaf 8-Sep-20 Cesium-134 -4.68E-01 7.23E+00 5.03E+00 pCi/kg 5F2 Cal Poly Farm(523232001) - VG Brdleaf 5-Oct-20 Cesium-134 -1.92E+00 6.16E+00 4.04E+00 pCi/kg 5F2 Cal Poly Farm(525832001) - VG Brdleaf 2-Nov-20 Cesium-134 -3.36E+00 6.76E+00 4.75E+00 pCi/kg 5F2 Cal Poly Farm(528798002) - VG Brdleaf 1-Dec-20 Cesium-134 -1.83E+00 7.52E+00 4.90E+00 pCi/kg 5F2 Cal Poly Farm(500489001) - VG Brdleaf 13-Jan-20 Cesium-137 1.54E+00 1.28E+01 7.82E+00 pCi/kg 5F2 Cal Poly Farm(502413001) - VG Brdleaf 4-Feb-20 Cesium-137 -2.77E+00 1.10E+01 7.03E+00 pCi/kg 5F2 Cal Poly Farm(505216002) - VG Brdleaf 2-Mar-20 Cesium-137 -2.06E+00 7.25E+00 4.71E+00 pCi/kg 5F2 Cal Poly Farm(508084002) - VG Brdleaf 6-Apr-20 Cesium-137 -4.97E-02 1.39E+01 8.28E+00 pCi/kg 5F2 Cal Poly Farm(510659001) - VG Brdleaf 4-May-20 Cesium-137 5.93E+00 1.25E+01 7.56E+00 pCi/kg 5F2 Cal Poly Farm(512048002) - VG Brdleaf 1-Jun-20 Cesium-137 3.30E+00 1.17E+01 6.88E+00 pCi/kg 5F2 Cal Poly Farm(514203002) - VG Brdleaf 6-Jul-20 Cesium-137 -1.91E+00 8.14E+00 5.13E+00 pCi/kg 5F2 Cal Poly Farm(517958003) - VG Brdleaf 11-Aug-20 Cesium-137 3.91E+00 1.56E+01 9.39E+00 pCi/kg 5F2 Cal Poly Farm(520363001) - VG Brdleaf 8-Sep-20 Cesium-137 -7.86E-01 6.46E+00 3.98E+00 pCi/kg 5F2 Cal Poly Farm(523232001) - VG Brdleaf 5-Oct-20 Cesium-137 -1.90E+00 6.26E+00 4.04E+00 pCi/kg 5F2 Cal Poly Farm(525832001) - VG Brdleaf 2-Nov-20 Cesium-137 -3.00E+00 6.86E+00 5.93E+00 pCi/kg 5F2 Cal Poly Farm(528798002) - VG Brdleaf 1-Dec-20 Cesium-137 2.51E-01 7.24E+00 4.40E+00 pCi/kg 5F2 Cal Poly Farm(500489001) - VG Brdleaf 13-Jan-20 Iodine-131 5.45E-01 1.54E+01 9.16E+00 pCi/kg 5F2 Cal Poly Farm(502413001) - VG Brdleaf 4-Feb-20 Iodine-131 -1.92E+00 1.68E+01 9.88E+00 pCi/kg 5F2 Cal Poly Farm(505216002) - VG Brdleaf 2-Mar-20 Iodine-131 5.36E+00 9.92E+00 6.06E+00 pCi/kg 5F2 Cal Poly Farm(508084002) - VG Brdleaf 6-Apr-20 Iodine-131 5.37E+00 1.57E+01 9.75E+00 pCi/kg 5F2 Cal Poly Farm(510659001) - VG Brdleaf 4-May-20 Iodine-131 -6.35E+00 1.20E+01 7.88E+00 pCi/kg 5F2 Cal Poly Farm(512048002) - VG Brdleaf 1-Jun-20 Iodine-131 -9.67E-01 1.33E+01 7.94E+00 pCi/kg 5F2 Cal Poly Farm(514203002) - VG Brdleaf 6-Jul-20 Iodine-131 -1.49E+00 1.17E+01 6.87E+00 pCi/kg 198

2020 DCPP REMP Analysis Results Appendix A 5F2 Cal Poly Farm(517958003) - VG Brdleaf 11-Aug-20 Iodine-131 9.42E+00 2.49E+01 1.48E+01 pCi/kg 5F2 Cal Poly Farm(520363001) - VG Brdleaf 8-Sep-20 Iodine-131 1.04E+01 1.04E+01 1.59E+01 pCi/kg 5F2 Cal Poly Farm(523232001) - VG Brdleaf 5-Oct-20 Iodine-131 4.34E+00 8.01E+00 5.28E+00 pCi/kg 5F2 Cal Poly Farm(525832001) - VG Brdleaf 2-Nov-20 Iodine-131 -5.24E+00 1.04E+01 6.75E+00 pCi/kg 5F2 Cal Poly Farm(528798002) - VG Brdleaf 1-Dec-20 Iodine-131 8.80E-02 8.07E+00 4.76E+00 pCi/kg 5S2 Diablo Creek Weir - Drinking Water Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 BETA 1.97E+00 1.61E+00 1.11E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 BETA 2.82E+00 2.83E+00 1.83E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 BETA 4.99E+00 2.42E+00 1.81E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 BETA 3.27E+00 2.42E+00 1.65E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 BETA 4.20E+00 2.20E+00 1.62E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 BETA 3.17E+00 2.65E+00 1.76E+00 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 BETA 1.81E+00 2.90E+00 1.82E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 BETA 1.53E+00 3.21E+00 1.97E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 BETA 1.45E+00 2.43E+00 1.52E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 BETA 5.70E-01 2.35E+00 1.44E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 BETA 2.29E+00 1.91E+00 1.29E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 BETA 1.78E+00 1.90E+00 1.24E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Barium-140 -4.05E+00 6.62E+00 4.60E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Barium-140 1.14E+00 6.53E+00 3.85E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Barium-140 -2.43E+00 6.70E+00 4.25E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Barium-140 -5.43E+00 5.59E+00 5.97E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Barium-140 -1.93E-01 7.15E+00 4.31E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Barium-140 -3.94E+00 6.85E+00 4.76E+00 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Barium-140 3.32E-01 7.79E+00 4.63E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Barium-140 -3.01E+00 6.92E+00 4.58E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Barium-140 1.57E+00 7.09E+00 4.16E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Barium-140 -1.82E+00 8.10E+00 5.04E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Barium-140 1.43E+00 6.12E+00 3.54E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Barium-140 -1.39E+00 8.73E+00 5.17E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Cesium-134 -3.63E-01 1.65E+00 1.05E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Cesium-134 -2.14E-01 1.72E+00 1.08E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Cesium-134 6.00E-02 1.46E+00 8.75E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Cesium-134 -5.44E-01 1.48E+00 9.30E-01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Cesium-134 -6.25E-01 1.49E+00 9.47E-01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Cesium-134 4.26E-01 1.71E+00 1.02E+00 pCi/L 199

2020 DCPP REMP Analysis Results Appendix A 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Cesium-134 6.14E-02 1.87E+00 1.15E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Cesium-134 4.15E-01 1.56E+00 8.89E-01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Cesium-134 6.02E-01 1.41E+00 8.52E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Cesium-134 1.20E+00 1.75E+00 1.12E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Cesium-134 -1.86E-02 1.33E+00 8.03E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Cesium-134 4.77E-01 1.75E+00 1.03E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Cesium-137 4.35E-01 1.56E+00 9.28E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Cesium-137 -9.43E-01 1.77E+00 1.64E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Cesium-137 4.95E-01 1.54E+00 9.07E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Cesium-137 3.64E-01 1.58E+00 9.51E-01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Cesium-137 -3.52E-01 1.54E+00 1.44E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Cesium-137 6.48E-01 1.54E+00 9.25E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Cesium-137 -1.73E-01 1.73E+00 1.07E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Cesium-137 -1.54E+00 1.60E+00 1.54E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Cesium-137 2.73E-01 1.35E+00 8.01E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Cesium-137 3.60E-01 1.52E+00 9.12E-01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Cesium-137 -6.71E-01 1.14E+00 7.96E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Cesium-137 6.76E-01 1.83E+00 1.08E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Cobalt-58 2.38E-01 1.59E+00 9.61E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Cobalt-58 -1.22E+00 1.47E+00 1.41E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Cobalt-58 -6.95E-01 1.38E+00 1.37E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Cobalt-58 -2.08E-01 1.27E+00 7.54E-01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Cobalt-58 -2.17E-01 1.31E+00 8.83E-01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Cobalt-58 -9.07E-02 1.33E+00 8.20E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Cobalt-58 6.25E-01 1.71E+00 1.08E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Cobalt-58 2.66E-01 1.45E+00 8.25E-01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Cobalt-58 -1.15E-01 1.26E+00 7.80E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Cobalt-58 -6.50E-01 1.36E+00 9.54E-01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Cobalt-58 6.36E-01 1.04E+00 1.46E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Cobalt-58 -1.61E-02 1.59E+00 9.46E-01 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Cobalt-60 -1.60E-01 1.51E+00 9.17E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Cobalt-60 -3.48E-02 1.73E+00 1.04E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Cobalt-60 -3.77E-01 1.47E+00 9.15E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Cobalt-60 1.25E+00 1.61E+00 1.31E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Cobalt-60 -8.04E-01 1.47E+00 1.83E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Cobalt-60 -2.33E-01 1.49E+00 9.07E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Cobalt-60 -2.95E-01 1.58E+00 9.95E-01 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Cobalt-60 3.59E-01 1.62E+00 9.52E-01 pCi/L 200

2020 DCPP REMP Analysis Results Appendix A 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Cobalt-60 -3.58E-02 1.47E+00 8.69E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Cobalt-60 4.57E-01 1.61E+00 9.39E-01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Cobalt-60 1.86E-01 1.22E+00 6.99E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Cobalt-60 7.88E-02 1.61E+00 1.07E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Iodine-131 -1.76E-01 9.45E-01 5.57E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Iodine-131 2.29E-01 9.37E-01 5.42E-01 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Iodine-131 -1.60E-01 4.83E-01 2.98E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Iodine-131 2.55E-01 8.34E-01 4.89E-01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Iodine-131 3.05E-01 6.40E-01 3.88E-01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Iodine-131 1.39E-01 5.23E-01 3.12E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Iodine-131 2.05E-01 6.31E-01 3.65E-01 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Iodine-131 -1.12E-02 5.80E-01 3.36E-01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Iodine-131 -3.10E-01 7.99E-01 5.01E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Iodine-131 -1.35E-01 5.23E-01 3.28E-01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Iodine-131 3.61E-01 7.34E-01 4.37E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Iodine-131 9.14E-02 8.06E-01 4.73E-01 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Iron-55 1.79E+01 6.25E+01 4.70E+01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Iron-55 -2.24E+01 9.26E+01 6.74E+01 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Iron-55 7.23E+00 1.02E+02 7.45E+01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Iron-55 -1.29E+01 7.64E+01 5.41E+01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Iron-55 4.72E+00 6.98E+01 4.70E+01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Iron-55 -9.07E+01 1.27E+02 7.73E+01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Iron-55 -5.65E+00 4.86E+01 3.07E+01 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Iron-55 -7.21E+01 1.03E+02 7.32E+01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Iron-55 4.89E+01 8.27E+01 6.62E+01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Iron-55 1.17E+01 1.17E+02 7.86E+01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Iron-55 1.18E+01 1.18E+02 7.49E+01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Iron-55 1.61E+01 1.35E+02 8.55E+01 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Iron-59 1.01E-01 2.86E+00 1.89E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Iron-59 -7.99E-01 2.71E+00 1.98E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Iron-59 -6.54E-01 2.89E+00 2.13E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Iron-59 4.05E-01 2.75E+00 1.60E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Iron-59 -1.10E-01 2.86E+00 1.70E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Iron-59 2.17E-01 3.16E+00 1.81E+00 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Iron-59 -1.55E+00 3.41E+00 2.27E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Iron-59 9.99E-01 3.11E+00 1.81E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Iron-59 -6.33E-01 2.64E+00 1.62E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Iron-59 -5.70E-01 3.05E+00 1.87E+00 pCi/L 201

2020 DCPP REMP Analysis Results Appendix A 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Iron-59 6.09E-01 2.64E+00 1.59E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Iron-59 1.59E+00 3.91E+00 2.36E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Lanthanum-140 4.88E-01 2.41E+00 1.59E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Lanthanum-140 6.41E-01 2.57E+00 1.52E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Lanthanum-140 -1.07E+00 2.04E+00 1.44E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Lanthanum-140 -3.17E-02 2.01E+00 1.23E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Lanthanum-140 2.76E-01 2.66E+00 1.60E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Lanthanum-140 -2.18E+00 2.48E+00 2.02E+00 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Lanthanum-140 -5.79E-01 2.85E+00 1.84E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Lanthanum-140 -8.89E-01 2.37E+00 1.61E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Lanthanum-140 -2.18E-01 2.22E+00 1.36E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Lanthanum-140 -9.13E-01 2.71E+00 1.82E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Lanthanum-140 -7.72E-01 2.05E+00 1.35E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Lanthanum-140 5.08E-01 3.31E+00 1.93E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Manganese-54 7.29E-01 1.60E+00 9.82E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Manganese-54 -1.70E-01 1.47E+00 8.64E-01 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Manganese-54 -4.89E-01 1.36E+00 8.95E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Manganese-54 1.20E+00 1.20E+00 1.43E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Manganese-54 5.16E-01 1.42E+00 8.19E-01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Manganese-54 -3.05E-01 1.31E+00 8.44E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Manganese-54 -4.21E-01 1.53E+00 9.32E-01 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Manganese-54 -7.61E-01 1.21E+00 8.35E-01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Manganese-54 -3.73E-01 1.18E+00 7.74E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Manganese-54 -8.07E-01 1.36E+00 1.04E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Manganese-54 -2.47E-01 1.20E+00 7.56E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Manganese-54 1.07E-01 1.63E+00 9.62E-01 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Nickel-63 1.78E+01 3.15E+01 1.98E+01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Nickel-63 3.47E+01 3.54E+01 2.33E+01 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Nickel-63 1.59E+01 2.05E+01 1.29E+01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Nickel-63 -1.45E+01 3.32E+01 1.92E+01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Nickel-63 -6.86E+00 3.18E+01 1.86E+01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Nickel-63 1.79E+01 3.08E+01 1.93E+01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Nickel-63 -8.29E+00 3.75E+01 2.20E+01 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Nickel-63 2.19E+01 3.95E+01 2.46E+01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Nickel-63 1.06E+01 2.95E+01 1.80E+01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Nickel-63 1.02E+01 2.00E+01 1.24E+01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Nickel-63 2.68E+00 4.01E+01 2.40E+01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Nickel-63 1.44E+00 3.97E+01 2.37E+01 pCi/L 202

2020 DCPP REMP Analysis Results Appendix A 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Niobium-95 6.55E-02 1.49E+00 9.03E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Niobium-95 -9.43E-01 1.62E+00 1.39E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Niobium-95 -2.12E-01 1.31E+00 8.13E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Niobium-95 -7.15E-01 1.44E+00 9.99E-01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Niobium-95 -1.20E+00 1.53E+00 1.74E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Niobium-95 1.91E-01 1.54E+00 9.25E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Niobium-95 -6.43E-01 1.54E+00 1.18E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Niobium-95 1.08E-01 1.53E+00 9.36E-01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Niobium-95 -1.04E+00 1.25E+00 1.21E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Niobium-95 4.68E-01 1.64E+00 9.97E-01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Niobium-95 4.05E-02 1.22E+00 7.31E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Niobium-95 6.09E-01 1.87E+00 1.54E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Total Strontium -1.07E-01 5.62E-01 3.26E-01 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Total Strontium -4.48E-02 6.43E-01 3.78E-01 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Total Strontium 9.87E-01 1.15E+00 8.01E-01 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Total Strontium -4.12E-01 9.63E-01 5.24E-01 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Total Strontium 3.70E-01 1.03E+00 6.67E-01 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Total Strontium -5.97E-04 6.10E-01 3.63E-01 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Total Strontium -3.94E-01 6.38E-01 3.27E-01 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Total Strontium 3.19E-02 8.80E-01 5.27E-01 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Total Strontium 6.05E-01 7.46E-01 5.33E-01 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Total Strontium 4.01E-02 1.40E+00 8.41E-01 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Total Strontium 2.49E-01 7.14E-01 4.59E-01 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Total Strontium 1.83E-01 7.44E-01 4.61E-01 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Tritium -9.12E+01 2.78E+02 1.61E+02 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Tritium 5.34E+00 3.10E+02 1.85E+02 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Tritium 7.24E+01 2.90E+02 1.77E+02 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Tritium -1.89E+01 2.73E+02 1.62E+02 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Tritium 6.73E+01 2.66E+02 1.63E+02 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Tritium -1.43E+01 2.70E+02 1.60E+02 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Tritium -3.13E+01 3.19E+02 1.88E+02 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Tritium -1.59E+02 3.26E+02 1.87E+02 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Tritium -8.39E+01 3.17E+02 1.85E+02 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Tritium -7.60E+01 3.42E+02 1.99E+02 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Tritium -8.93E+01 2.77E+02 1.61E+02 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Tritium 7.60E+01 3.73E+02 2.28E+02 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Zinc-65 1.33E+00 3.40E+00 2.19E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Zinc-65 3.65E+00 4.22E+00 2.75E+00 pCi/L 203

2020 DCPP REMP Analysis Results Appendix A 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Zinc-65 1.16E+00 2.90E+00 1.74E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Zinc-65 -7.68E-02 3.08E+00 2.09E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Zinc-65 9.79E-02 2.98E+00 1.75E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Zinc-65 4.11E-02 2.88E+00 1.89E+00 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Zinc-65 -1.02E+00 2.86E+00 1.86E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Zinc-65 -1.24E+00 2.92E+00 1.93E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Zinc-65 -2.32E-01 2.66E+00 1.70E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Zinc-65 9.34E-01 3.27E+00 1.90E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Zinc-65 -7.02E-01 2.54E+00 1.56E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Zinc-65 1.08E+00 3.41E+00 2.29E+00 pCi/L 5S2 Diablo Creek Weir(500502002) - DW 14-Jan-20 Zirconium-95 3.64E-01 2.87E+00 1.73E+00 pCi/L 5S2 Diablo Creek Weir(502412002) - DW 4-Feb-20 Zirconium-95 3.37E-01 2.71E+00 1.64E+00 pCi/L 5S2 Diablo Creek Weir(505351001) - DW 4-Mar-20 Zirconium-95 -2.17E-01 2.43E+00 1.48E+00 pCi/L 5S2 Diablo Creek Weir(508672002) - DW 7-Apr-20 Zirconium-95 1.52E+00 2.52E+00 2.38E+00 pCi/L 5S2 Diablo Creek Weir(509753001) - DW 6-May-20 Zirconium-95 1.12E+00 2.71E+00 1.66E+00 pCi/L 5S2 Diablo Creek Weir(512119002) - DW 2-Jun-20 Zirconium-95 1.35E+00 2.68E+00 1.63E+00 pCi/L 5S2 Diablo Creek Weir(514708002) - DW 7-Jul-20 Zirconium-95 5.55E-01 2.95E+00 1.78E+00 pCi/L 5S2 Diablo Creek Weir(516778002) - DW 4-Aug-20 Zirconium-95 -1.18E+00 2.37E+00 1.66E+00 pCi/L 5S2 Diablo Creek Weir(520032002) - DW 2-Sep-20 Zirconium-95 -6.76E-03 2.28E+00 1.38E+00 pCi/L 5S2 Diablo Creek Weir(522577002) - DW 6-Oct-20 Zirconium-95 3.46E-01 2.46E+00 1.49E+00 pCi/L 5S2 Diablo Creek Weir(525831002) - DW 3-Nov-20 Zirconium-95 1.30E-01 2.34E+00 1.39E+00 pCi/L 5S2 Diablo Creek Weir(528796002) - DW 2-Dec-20 Zirconium-95 3.04E-01 2.96E+00 1.74E+00 pCi/L 6C1 Household Garden - Vegetation Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 6C1 Household Garden(500502009) - VG Brdleaf 14-Jan-20 Cesium-134 -9.96E-01 1.47E+01 9.08E+00 pCi/kg 6C1 Household Garden(510173001) - VG Brdleaf 27-Apr-20 Cesium-134 1.37E+00 1.91E+01 1.15E+01 pCi/kg 6C1 Household Garden(515499001) - VG Brdleaf 6-Jul-20 Cesium-134 -8.15E-01 9.08E+00 5.61E+00 pCi/kg 6C1 Household Garden(523920001) - VG Brdleaf 7-Oct-20 Cesium-134 8.87E-01 1.11E+01 6.35E+00 pCi/kg 6C1 Household Garden(500502009) - VG Brdleaf 14-Jan-20 Cesium-137 1.17E-01 1.41E+01 1.16E+01 pCi/kg 6C1 Household Garden(510173001) - VG Brdleaf 27-Apr-20 Cesium-137 6.94E+00 1.84E+01 1.20E+01 pCi/kg 6C1 Household Garden(515499001) - VG Brdleaf 6-Jul-20 Cesium-137 -2.49E-01 8.43E+00 5.08E+00 pCi/kg 6C1 Household Garden(523920001) - VG Brdleaf 7-Oct-20 Cesium-137 9.23E-01 1.08E+01 6.54E+00 pCi/kg 6C1 Household Garden(500502009) - VG Brdleaf 14-Jan-20 Iodine-131 1.32E+00 1.65E+01 9.54E+00 pCi/kg 6C1 Household Garden(510173001) - VG Brdleaf 27-Apr-20 Iodine-131 4.52E+00 3.31E+01 1.93E+01 pCi/kg 6C1 Household Garden(515499001) - VG Brdleaf 6-Jul-20 Iodine-131 -5.94E+00 1.81E+01 1.11E+01 pCi/kg 6C1 Household Garden(523920001) - VG Brdleaf 7-Oct-20 Iodine-131 8.19E+00 2.02E+01 1.20E+01 pCi/kg 204

2020 DCPP REMP Analysis Results Appendix A 7C1 Pecho Creek Ruins - Vegetation Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C1 Pecho Creek Ruins(500489004) - VG Brdleaf 13-Jan-20 Cesium-134 6.31E+00 1.28E+01 7.46E+00 pCi/kg 7C1 Pecho Creek Ruins(502413003) - VG Brdleaf 4-Feb-20 Cesium-134 3.23E+00 1.64E+01 9.43E+00 pCi/kg 7C1 Pecho Creek Ruins(505216004) - VG Brdleaf 2-Mar-20 Cesium-134 -2.18E+00 8.23E+00 5.22E+00 pCi/kg 7C1 Pecho Creek Ruins(508084004) - VG Brdleaf 6-Apr-20 Cesium-134 2.28E+00 1.15E+01 6.61E+00 pCi/kg 7C1 Pecho Creek Ruins(510659003) - VG Brdleaf 4-May-20 Cesium-134 -2.29E+00 1.17E+01 7.30E+00 pCi/kg 7C1 Pecho Creek Ruins(512048004) - VG Brdleaf 1-Jun-20 Cesium-134 2.19E+00 1.30E+01 7.77E+00 pCi/kg 7C1 Pecho Creek Ruins(514203004) - VG Brdleaf 6-Jul-20 Cesium-134 4.63E+00 1.39E+01 8.13E+00 pCi/kg 7C1 Pecho Creek Ruins(517958005) - VG Brdleaf 11-Aug-20 Cesium-134 7.16E-01 7.02E+00 4.19E+00 pCi/kg 7C1 Pecho Creek Ruins(520363004) - VG Brdleaf 8-Sep-20 Cesium-134 3.40E+00 1.09E+01 6.48E+00 pCi/kg 7C1 Pecho Creek Ruins(523232003) - VG Brdleaf 5-Oct-20 Cesium-134 -7.96E-01 1.03E+01 6.33E+00 pCi/kg 7C1 Pecho Creek Ruins(525832003) - VG Brdleaf 2-Nov-20 Cesium-134 8.76E-01 6.32E+00 3.77E+00 pCi/kg 7C1 Pecho Creek Ruins(528798004) - VG Brdleaf 1-Dec-20 Cesium-134 -4.04E+00 1.31E+01 8.62E+00 pCi/kg 7C1 Pecho Creek Ruins(500489004) - VG Brdleaf 13-Jan-20 Cesium-137 9.67E+00 1.20E+01 1.29E+01 pCi/kg 7C1 Pecho Creek Ruins(502413003) - VG Brdleaf 4-Feb-20 Cesium-137 -4.89E+00 1.43E+01 1.20E+01 pCi/kg 7C1 Pecho Creek Ruins(505216004) - VG Brdleaf 2-Mar-20 Cesium-137 -3.11E+00 7.63E+00 6.96E+00 pCi/kg 7C1 Pecho Creek Ruins(508084004) - VG Brdleaf 6-Apr-20 Cesium-137 1.49E+00 1.07E+01 9.21E+00 pCi/kg 7C1 Pecho Creek Ruins(510659003) - VG Brdleaf 4-May-20 Cesium-137 2.21E+00 1.21E+01 6.89E+00 pCi/kg 7C1 Pecho Creek Ruins(512048004) - VG Brdleaf 1-Jun-20 Cesium-137 2.99E+00 1.19E+01 7.01E+00 pCi/kg 7C1 Pecho Creek Ruins(514203004) - VG Brdleaf 6-Jul-20 Cesium-137 5.43E+00 1.27E+01 7.47E+00 pCi/kg 7C1 Pecho Creek Ruins(517958005) - VG Brdleaf 11-Aug-20 Cesium-137 1.46E+00 6.05E+00 3.57E+00 pCi/kg 7C1 Pecho Creek Ruins(520363004) - VG Brdleaf 8-Sep-20 Cesium-137 8.07E+00 1.17E+01 7.36E+00 pCi/kg 7C1 Pecho Creek Ruins(523232003) - VG Brdleaf 5-Oct-20 Cesium-137 -1.18E+00 1.00E+01 6.15E+00 pCi/kg 7C1 Pecho Creek Ruins(525832003) - VG Brdleaf 2-Nov-20 Cesium-137 2.09E+00 6.77E+00 4.00E+00 pCi/kg 7C1 Pecho Creek Ruins(528798004) - VG Brdleaf 1-Dec-20 Cesium-137 2.53E+00 1.23E+01 7.33E+00 pCi/kg 7C1 Pecho Creek Ruins(500489004) - VG Brdleaf 13-Jan-20 Iodine-131 -9.49E-01 1.39E+01 8.20E+00 pCi/kg 7C1 Pecho Creek Ruins(502413003) - VG Brdleaf 4-Feb-20 Iodine-131 -1.19E+01 2.22E+01 1.50E+01 pCi/kg 7C1 Pecho Creek Ruins(505216004) - VG Brdleaf 2-Mar-20 Iodine-131 -2.22E+00 9.03E+00 5.41E+00 pCi/kg 7C1 Pecho Creek Ruins(508084004) - VG Brdleaf 6-Apr-20 Iodine-131 1.40E+00 1.23E+01 7.27E+00 pCi/kg 7C1 Pecho Creek Ruins(510659003) - VG Brdleaf 4-May-20 Iodine-131 -2.67E+00 1.27E+01 7.97E+00 pCi/kg 7C1 Pecho Creek Ruins(512048004) - VG Brdleaf 1-Jun-20 Iodine-131 4.75E+00 1.34E+01 7.82E+00 pCi/kg 7C1 Pecho Creek Ruins(514203004) - VG Brdleaf 6-Jul-20 Iodine-131 -2.64E+00 1.43E+01 8.92E+00 pCi/kg 7C1 Pecho Creek Ruins(517958005) - VG Brdleaf 11-Aug-20 Iodine-131 2.33E+00 1.27E+01 7.41E+00 pCi/kg 7C1 Pecho Creek Ruins(520363004) - VG Brdleaf 8-Sep-20 Iodine-131 2.71E-01 1.52E+01 8.84E+00 pCi/kg 7C1 Pecho Creek Ruins(523232003) - VG Brdleaf 5-Oct-20 Iodine-131 8.38E-01 1.34E+01 7.71E+00 pCi/kg 7C1 Pecho Creek Ruins(525832003) - VG Brdleaf 2-Nov-20 Iodine-131 -1.42E+00 8.36E+00 4.98E+00 pCi/kg 7C1 Pecho Creek Ruins(528798004) - VG Brdleaf 1-Dec-20 Iodine-131 -2.62E+00 2.03E+01 1.21E+01 pCi/kg 205

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon - Aquatic Vegetation Algae Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(500916005) - AV Algae 21-Jan-20 Cesium-134 -1.24E+00 1.26E+01 7.71E+00 pCi/kg 7C2 Rattlesnake Canyon(509741004) - AV Algae 14-Apr-20 Cesium-134 -9.48E+00 9.78E+00 8.99E+00 pCi/kg 7C2 Rattlesnake Canyon(515653004) - AV Algae 23-Jul-20 Cesium-134 -6.59E-01 5.64E+00 3.52E+00 pCi/kg 7C2 Rattlesnake Canyon(525424001) - AV Algae 27-Oct-20 Cesium-134 3.17E+00 9.12E+00 5.24E+00 pCi/kg 7C2 Rattlesnake Canyon(500916005) - AV Algae 21-Jan-20 Cesium-137 7.53E+00 1.36E+01 8.08E+00 pCi/kg 7C2 Rattlesnake Canyon(509741004) - AV Algae 14-Apr-20 Cesium-137 3.44E-01 9.18E+00 5.46E+00 pCi/kg 7C2 Rattlesnake Canyon(515653004) - AV Algae 23-Jul-20 Cesium-137 -8.42E-01 5.81E+00 3.61E+00 pCi/kg 7C2 Rattlesnake Canyon(525424001) - AV Algae 27-Oct-20 Cesium-137 7.29E+00 7.29E+00 6.62E+00 pCi/kg 7C2 Rattlesnake Canyon(500916005) - AV Algae 21-Jan-20 Cobalt-58 -3.91E+00 1.06E+01 7.14E+00 pCi/kg 7C2 Rattlesnake Canyon(509741004) - AV Algae 14-Apr-20 Cobalt-58 5.01E-01 9.55E+00 5.74E+00 pCi/kg 7C2 Rattlesnake Canyon(515653004) - AV Algae 23-Jul-20 Cobalt-58 -2.80E+00 4.93E+00 3.65E+00 pCi/kg 7C2 Rattlesnake Canyon(525424001) - AV Algae 27-Oct-20 Cobalt-58 4.46E-01 7.78E+00 4.54E+00 pCi/kg 7C2 Rattlesnake Canyon(500916005) - AV Algae 21-Jan-20 Cobalt-60 6.11E+00 1.56E+01 8.71E+00 pCi/kg 7C2 Rattlesnake Canyon(509741004) - AV Algae 14-Apr-20 Cobalt-60 2.20E+00 1.01E+01 6.24E+00 pCi/kg 7C2 Rattlesnake Canyon(515653004) - AV Algae 23-Jul-20 Cobalt-60 8.68E+00 8.68E+00 7.37E+00 pCi/kg 7C2 Rattlesnake Canyon(525424001) - AV Algae 27-Oct-20 Cobalt-60 3.20E+00 9.71E+00 5.65E+00 pCi/kg 7C2 Rattlesnake Canyon - Aquatic Vegetation Kelp Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(501627001) - AV Kelp 23-Jan-20 Cesium-134 -3.74E+00 9.19E+00 6.18E+00 pCi/kg 7C2 Rattlesnake Canyon(509770002) - AV Kelp 13-Apr-20 Cesium-134 2.88E+00 9.30E+00 5.56E+00 pCi/kg 7C2 Rattlesnake Canyon(514717002) - AV Kelp 14-Jul-20 Cesium-134 -1.61E+00 1.31E+01 8.10E+00 pCi/kg 7C2 Rattlesnake Canyon(522578004) - AV Kelp 19-Oct-20 Cesium-134 -1.45E-01 7.18E+00 4.33E+00 pCi/kg 7C2 Rattlesnake Canyon(525420004) - AV Kelp 26-Oct-20 Cesium-134 8.27E-01 8.56E+00 4.94E+00 pCi/kg 7C2 Rattlesnake Canyon(501627001) - AV Kelp 23-Jan-20 Cesium-137 7.63E-01 8.69E+00 5.12E+00 pCi/kg 7C2 Rattlesnake Canyon(509770002) - AV Kelp 13-Apr-20 Cesium-137 1.74E+00 7.92E+00 4.89E+00 pCi/kg 7C2 Rattlesnake Canyon(514717002) - AV Kelp 14-Jul-20 Cesium-137 1.37E+00 1.15E+01 6.74E+00 pCi/kg 7C2 Rattlesnake Canyon(522578004) - AV Kelp 19-Oct-20 Cesium-137 3.62E+00 6.65E+00 4.04E+00 pCi/kg 7C2 Rattlesnake Canyon(525420004) - AV Kelp 26-Oct-20 Cesium-137 -2.88E+00 7.15E+00 4.55E+00 pCi/kg 7C2 Rattlesnake Canyon(501627001) - AV Kelp 23-Jan-20 Cobalt-58 7.54E-01 9.14E+00 5.46E+00 pCi/kg 7C2 Rattlesnake Canyon(509770002) - AV Kelp 13-Apr-20 Cobalt-58 1.96E+00 7.90E+00 4.70E+00 pCi/kg 7C2 Rattlesnake Canyon(514717002) - AV Kelp 14-Jul-20 Cobalt-58 2.21E+00 1.22E+01 7.24E+00 pCi/kg 7C2 Rattlesnake Canyon(522578004) - AV Kelp 19-Oct-20 Cobalt-58 -8.94E-01 6.67E+00 4.10E+00 pCi/kg 7C2 Rattlesnake Canyon(525420004) - AV Kelp 26-Oct-20 Cobalt-58 2.23E-01 7.54E+00 4.38E+00 pCi/kg 7C2 Rattlesnake Canyon(501627001) - AV Kelp 23-Jan-20 Cobalt-60 5.72E-01 1.10E+01 7.52E+00 pCi/kg 7C2 Rattlesnake Canyon(509770002) - AV Kelp 13-Apr-20 Cobalt-60 -1.17E+00 1.04E+01 6.24E+00 pCi/kg 206

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(514717002) - AV Kelp 14-Jul-20 Cobalt-60 6.81E+00 1.48E+01 8.50E+00 pCi/kg 7C2 Rattlesnake Canyon(522578004) - AV Kelp 19-Oct-20 Cobalt-60 6.84E+00 7.51E+00 8.67E+00 pCi/kg 7C2 Rattlesnake Canyon(525420004) - AV Kelp 26-Oct-20 Cobalt-60 -9.04E-01 8.28E+00 5.48E+00 pCi/kg 7C2 Rattlesnake Canyon - Fish Perch Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Cesium-134 6.41E-01 2.26E+01 1.33E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Cesium-134 -5.77E+00 2.55E+01 1.68E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Cesium-134 1.30E+00 2.26E+01 1.38E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Cesium-134 -9.60E-01 2.16E+01 1.27E+01 pCi/kg 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Cesium-137 1.36E+01 2.42E+01 1.45E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Cesium-137 1.18E+01 2.43E+01 2.81E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Cesium-137 1.87E+01 1.87E+01 2.45E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Cesium-137 1.11E+00 2.08E+01 1.20E+01 pCi/kg 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Cobalt-58 9.85E+00 2.54E+01 1.49E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Cobalt-58 4.21E+00 2.33E+01 1.40E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Cobalt-58 -5.78E+00 1.96E+01 1.27E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Cobalt-58 8.06E+00 2.27E+01 1.31E+01 pCi/kg 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Cobalt-60 -5.33E-02 2.50E+01 1.55E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Cobalt-60 1.65E+01 3.53E+01 3.46E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Cobalt-60 3.66E+00 2.20E+01 1.31E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Cobalt-60 1.01E+01 2.04E+01 1.37E+01 pCi/kg 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Iron-59 3.88E+00 5.22E+01 3.14E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Iron-59 1.04E+01 6.62E+01 4.31E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Iron-59 1.04E+01 4.83E+01 2.84E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Iron-59 -2.61E+01 4.49E+01 3.65E+01 pCi/kg 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Manganese-54 1.48E+01 2.55E+01 1.55E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Manganese-54 8.45E+00 2.78E+01 1.67E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Manganese-54 1.34E+01 2.02E+01 1.43E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Manganese-54 3.72E-01 1.96E+01 1.14E+01 pCi/kg 7C2 Rattlesnake Canyon(504740008) - FH Perch 20-Feb-20 Zinc-65 6.84E+00 5.15E+01 3.50E+01 pCi/kg 7C2 Rattlesnake Canyon(513081002) - FH Perch 3-Jun-20 Zinc-65 -3.85E+01 5.79E+01 5.52E+01 pCi/kg 7C2 Rattlesnake Canyon(517473005) - FH Perch 27-Jul-20 Zinc-65 3.87E+01 4.04E+01 4.04E+01 pCi/kg 7C2 Rattlesnake Canyon(523223004) - FH Perch 9-Oct-20 Zinc-65 1.13E+01 4.71E+01 2.74E+01 pCi/kg 207

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon - Rockfish Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Cesium-134 1.54E+01 2.21E+01 1.43E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Cesium-134 -4.72E+00 2.45E+01 1.52E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Cesium-134 1.47E+01 3.10E+01 1.93E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Cesium-134 5.21E+00 3.20E+01 1.91E+01 pCi/kg 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Cesium-137 1.34E+01 2.22E+01 1.41E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Cesium-137 2.42E+01 2.42E+01 2.23E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Cesium-137 8.69E+00 2.80E+01 1.72E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Cesium-137 2.42E+01 2.73E+01 1.94E+01 pCi/kg 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Cobalt-58 -5.83E+00 1.90E+01 1.23E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Cobalt-58 5.69E+00 2.59E+01 1.51E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Cobalt-58 8.63E+00 3.08E+01 1.91E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Cobalt-58 -1.94E+00 3.16E+01 2.19E+01 pCi/kg 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Cobalt-60 6.80E-01 1.94E+01 1.17E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Cobalt-60 1.46E+01 2.69E+01 1.73E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Cobalt-60 -1.40E+01 2.84E+01 2.04E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Cobalt-60 5.32E+00 3.04E+01 1.75E+01 pCi/kg 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Iron-59 6.78E-01 4.32E+01 2.58E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Iron-59 -1.56E+01 5.10E+01 3.88E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Iron-59 -1.42E+01 7.06E+01 4.46E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Iron-59 -3.32E+01 7.66E+01 5.04E+01 pCi/kg 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Manganese-54 4.70E+00 1.93E+01 1.12E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Manganese-54 1.72E+00 2.51E+01 1.49E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Manganese-54 -2.26E+00 2.96E+01 2.34E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Manganese-54 3.05E+00 2.72E+01 1.64E+01 pCi/kg 7C2 Rattlesnake Canyon(504740004) - FH Rockfsh 20-Feb-20 Zinc-65 -5.79E+00 4.18E+01 2.58E+01 pCi/kg 7C2 Rattlesnake Canyon(513081007) - FH Rockfsh 3-Jun-20 Zinc-65 2.06E+01 5.78E+01 3.42E+01 pCi/kg 7C2 Rattlesnake Canyon(517473006) - FH Rockfsh 27-Jul-20 Zinc-65 -2.33E+01 5.53E+01 3.77E+01 pCi/kg 7C2 Rattlesnake Canyon(525676001) - FH Rockfsh 9-Oct-20 Zinc-65 3.97E+01 7.37E+01 4.35E+01 pCi/kg 7C2 Rattlesnake Canyon - Intertidal Mussel Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Cesium-134 -4.61E+00 1.92E+01 1.23E+01 pCi/kg 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Cesium-134 2.26E+00 1.65E+01 9.86E+00 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Cesium-134 2.33E+00 2.78E+01 1.65E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Cesium-134 1.90E+00 2.11E+01 1.27E+01 pCi/kg 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Cesium-137 3.60E+00 1.76E+01 1.06E+01 pCi/kg 208

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Cesium-137 -4.00E+00 1.68E+01 1.37E+01 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Cesium-137 4.14E+00 2.51E+01 1.51E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Cesium-137 -1.57E+01 2.04E+01 1.98E+01 pCi/kg 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Cobalt-58 -6.43E+00 1.80E+01 1.20E+01 pCi/kg 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Cobalt-58 3.40E+00 1.58E+01 9.40E+00 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Cobalt-58 1.30E+01 2.73E+01 1.64E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Cobalt-58 4.36E+00 2.10E+01 1.25E+01 pCi/kg 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Cobalt-60 -5.08E-01 1.80E+01 1.23E+01 pCi/kg 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Cobalt-60 -2.00E-02 1.65E+01 9.74E+00 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Cobalt-60 -3.01E+00 2.68E+01 1.86E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Cobalt-60 7.02E-01 2.12E+01 1.27E+01 pCi/kg 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Iron-59 -8.80E+00 3.85E+01 2.42E+01 pCi/kg 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Iron-59 -4.36E+00 3.31E+01 2.14E+01 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Iron-59 5.01E+00 6.09E+01 3.63E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Iron-59 2.71E+00 3.91E+01 2.27E+01 pCi/kg 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Manganese-54 7.36E+00 1.87E+01 1.11E+01 pCi/kg 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Manganese-54 9.25E+00 1.60E+01 1.13E+01 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Manganese-54 2.17E+00 2.54E+01 1.48E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Manganese-54 6.02E-01 1.74E+01 1.07E+01 pCi/kg 7C2 Rattlesnake Canyon(500916003) - IM 21-Jan-20 Zinc-65 1.70E+00 3.74E+01 2.60E+01 pCi/kg 7C2 Rattlesnake Canyon(509741003) - IM 14-Apr-20 Zinc-65 7.11E+00 3.42E+01 2.06E+01 pCi/kg 7C2 Rattlesnake Canyon(515653002) - IM 23-Jul-20 Zinc-65 -3.65E+01 5.77E+01 4.07E+01 pCi/kg 7C2 Rattlesnake Canyon(523223009) - IM 27-Oct-20 Zinc-65 -5.83E+00 4.34E+01 2.66E+01 pCi/kg 7C2 Rattlesnake Canyon - Ocean Sediment Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Barium-140 3.64E+01 3.05E+02 1.72E+02 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Cesium-134 1.90E+01 5.31E+01 2.93E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Cesium-137 3.54E+01 5.35E+01 3.19E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Cobalt-58 -1.11E+01 4.84E+01 2.93E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Cobalt-60 -1.26E+00 4.56E+01 2.65E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Iron-55 1.47E+03 9.08E+03 6.76E+03 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Iron-59 9.38E+00 1.10E+02 6.39E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Lanthanum-140 -7.57E+00 9.72E+01 6.39E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Manganese-54 7.75E+00 4.84E+01 2.70E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Nickel-63 2.36E+02 2.13E+03 1.28E+03 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Niobium-95 -1.55E+01 3.95E+01 2.95E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Total Strontium -1.96E+02 3.86E+02 2.09E+02 pCi/kg 209

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Zinc-65 3.40E+01 1.07E+02 6.81E+01 pCi/kg 7C2 Rattlesnake Canyon(505076002) - SD 20-Feb-20 Zirconium-95 -2.32E+01 7.51E+01 4.66E+01 pCi/kg 7C2 Rattlesnake Canyon - Seawater Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 BETA 5.23E+02 1.62E+02 1.38E+02 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 BETA 3.13E+02 1.47E+02 1.10E+02 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 BETA 2.97E+02 9.94E+01 8.55E+01 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 BETA 3.82E+02 1.30E+02 1.10E+02 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 BETA 2.30E+02 1.73E+02 1.16E+02 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 BETA 2.70E+02 1.28E+02 9.60E+01 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 BETA 3.67E+02 1.58E+02 1.20E+02 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 BETA 4.68E+02 1.19E+02 1.16E+02 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 BETA 3.56E+02 1.75E+02 1.27E+02 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 BETA 2.41E+02 1.76E+02 1.17E+02 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 BETA 2.64E+02 1.14E+02 8.83E+01 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 BETA 2.73E+02 9.07E+01 8.04E+01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 BETA 2.57E+02 1.44E+02 1.02E+02 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 BETA 1.51E+02 1.22E+02 8.15E+01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Barium-140 1.24E+00 9.40E+00 5.76E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Barium-140 1.01E+00 8.30E+00 4.90E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Barium-140 -4.12E+00 6.70E+00 6.19E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Barium-140 -3.26E+00 7.22E+00 4.93E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Barium-140 -1.43E+00 1.01E+01 6.09E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Barium-140 4.34E-01 7.88E+00 4.80E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Barium-140 1.88E-01 7.11E+00 4.16E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Barium-140 4.69E+00 8.11E+00 5.63E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Barium-140 1.18E+00 9.34E+00 5.72E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Barium-140 -4.11E+00 8.77E+00 5.80E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Barium-140 6.86E+00 6.86E+00 7.69E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Barium-140 1.46E+00 6.44E+00 3.78E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Barium-140 1.34E+00 7.29E+00 4.36E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Barium-140 -1.42E-01 7.79E+00 4.82E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Cesium-134 -6.97E-01 1.72E+00 1.11E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Cesium-134 4.96E-02 1.77E+00 1.09E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Cesium-134 -3.10E-02 1.39E+00 8.51E-01 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Cesium-134 -1.65E-03 1.86E+00 1.10E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Cesium-134 3.45E-02 2.01E+00 1.22E+00 pCi/L 210

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Cesium-134 6.11E-02 2.27E+00 1.32E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Cesium-134 8.33E-01 1.38E+00 1.18E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Cesium-134 -3.78E-01 1.60E+00 9.75E-01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Cesium-134 9.66E-02 1.74E+00 1.02E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Cesium-134 -7.76E-01 1.71E+00 1.17E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Cesium-134 4.36E-01 1.49E+00 8.84E-01 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Cesium-134 -4.82E-01 1.47E+00 1.27E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Cesium-134 -2.92E-01 1.63E+00 1.00E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Cesium-134 4.73E-01 1.68E+00 9.85E-01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Cesium-137 7.23E-01 1.79E+00 1.05E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Cesium-137 1.07E+00 1.88E+00 1.17E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Cesium-137 -3.00E-01 1.49E+00 1.32E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Cesium-137 -4.77E-01 1.81E+00 1.10E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Cesium-137 -1.14E-01 1.82E+00 1.24E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Cesium-137 -8.08E-03 2.03E+00 1.18E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Cesium-137 -3.14E-01 1.51E+00 1.58E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Cesium-137 1.86E-01 1.48E+00 8.47E-01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Cesium-137 4.59E-01 1.80E+00 1.34E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Cesium-137 -1.44E+00 1.89E+00 2.13E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Cesium-137 6.34E-01 1.35E+00 1.22E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Cesium-137 -8.81E-02 1.48E+00 8.93E-01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Cesium-137 -9.77E-01 1.63E+00 1.39E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Cesium-137 4.87E-01 1.55E+00 1.01E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Cobalt-58 1.34E-01 1.65E+00 9.65E-01 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Cobalt-58 -6.16E-01 1.69E+00 1.13E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Cobalt-58 -1.70E-01 1.41E+00 8.80E-01 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Cobalt-58 2.47E-01 1.74E+00 1.02E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Cobalt-58 -1.15E+00 1.57E+00 1.19E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Cobalt-58 -1.01E-01 1.78E+00 1.05E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Cobalt-58 -2.85E-01 1.26E+00 8.90E-01 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Cobalt-58 5.38E-01 1.51E+00 8.88E-01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Cobalt-58 -5.59E-01 1.51E+00 9.73E-01 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Cobalt-58 1.83E+00 1.83E+00 3.06E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Cobalt-58 2.82E-01 1.24E+00 7.33E-01 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Cobalt-58 -6.39E-01 1.18E+00 8.32E-01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Cobalt-58 1.27E-01 1.59E+00 9.39E-01 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Cobalt-58 -3.00E-01 1.41E+00 8.63E-01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Cobalt-60 5.93E-01 1.68E+00 9.53E-01 pCi/L 211

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Cobalt-60 7.38E-01 2.10E+00 1.38E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Cobalt-60 5.59E-01 1.49E+00 8.67E-01 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Cobalt-60 1.66E-01 2.03E+00 1.17E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Cobalt-60 3.26E-01 2.13E+00 1.23E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Cobalt-60 -4.89E-01 1.97E+00 1.28E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Cobalt-60 -1.10E+00 1.63E+00 1.63E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Cobalt-60 -2.03E-01 1.59E+00 9.43E-01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Cobalt-60 3.10E-01 1.87E+00 1.07E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Cobalt-60 3.16E-01 2.00E+00 1.15E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Cobalt-60 4.85E-01 1.49E+00 8.55E-01 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Cobalt-60 6.20E-01 1.45E+00 9.33E-01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Cobalt-60 7.96E-01 1.96E+00 1.16E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Cobalt-60 6.36E-01 1.63E+00 9.78E-01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Iodine-131 2.32E+00 3.60E+00 2.49E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Iodine-131 8.34E-01 2.85E+00 1.65E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Iodine-131 4.29E-01 2.55E+00 1.46E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Iodine-131 -1.54E+00 2.56E+00 1.77E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Iodine-131 -2.82E-01 3.69E+00 2.15E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Iodine-131 -8.55E-01 2.05E+00 1.50E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Iodine-131 1.49E+00 3.00E+00 1.80E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Iodine-131 1.35E+00 2.85E+00 1.74E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Iodine-131 4.92E-01 3.39E+00 2.03E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Iodine-131 -8.32E-02 3.51E+00 2.03E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Iodine-131 1.67E+00 2.55E+00 1.58E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Iodine-131 -3.49E-01 2.13E+00 1.26E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Iodine-131 -1.75E-01 2.30E+00 1.37E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Iodine-131 -1.88E-01 2.93E+00 1.78E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Iron-55 2.68E+01 8.42E+01 6.18E+01 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Iron-55 -4.50E+00 9.08E+01 6.59E+01 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Iron-55 -3.17E+01 1.01E+02 7.19E+01 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Iron-55 -2.57E+01 8.42E+01 6.00E+01 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Iron-55 2.88E+01 1.39E+02 9.84E+01 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Iron-55 -7.11E+00 3.99E+01 2.56E+01 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Iron-55 -1.28E+01 5.17E+01 3.19E+01 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Iron-55 2.93E+01 7.86E+01 6.11E+01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Iron-55 2.33E+01 8.32E+01 6.50E+01 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Iron-55 4.20E+00 1.27E+02 8.11E+01 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Iron-55 -6.74E+00 1.23E+02 7.83E+01 pCi/L 212

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Iron-55 -3.49E+01 1.63E+02 9.99E+01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Iron-55 4.16E+01 1.78E+02 1.13E+02 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Iron-55 -3.39E+00 1.30E+02 8.16E+01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Iron-59 -2.91E+00 3.91E+00 4.80E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Iron-59 1.48E+00 3.93E+00 2.30E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Iron-59 4.29E-01 3.22E+00 1.85E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Iron-59 -3.42E-01 3.47E+00 2.14E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Iron-59 -9.80E-01 3.91E+00 2.39E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Iron-59 -7.37E-01 4.15E+00 2.58E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Iron-59 2.74E-01 2.79E+00 1.69E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Iron-59 -9.76E-01 3.05E+00 1.96E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Iron-59 1.91E+00 4.09E+00 2.48E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Iron-59 -5.17E-01 4.11E+00 2.43E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Iron-59 -2.60E+00 2.56E+00 2.60E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Iron-59 4.92E-01 2.83E+00 1.62E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Iron-59 -4.06E-01 3.26E+00 1.97E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Iron-59 -8.88E-01 2.86E+00 1.84E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Lanthanum-140 1.80E+00 3.46E+00 2.03E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Lanthanum-140 -1.11E+00 2.51E+00 1.76E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Lanthanum-140 9.38E-02 2.28E+00 1.36E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Lanthanum-140 4.95E-01 2.76E+00 1.59E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Lanthanum-140 -1.43E+00 2.80E+00 1.97E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Lanthanum-140 4.23E-01 2.79E+00 1.59E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Lanthanum-140 -4.57E-01 2.26E+00 1.39E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Lanthanum-140 7.70E-01 2.77E+00 1.61E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Lanthanum-140 -1.45E-02 3.14E+00 1.85E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Lanthanum-140 -4.47E-01 2.97E+00 1.84E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Lanthanum-140 -3.48E-01 2.26E+00 1.39E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Lanthanum-140 -1.15E+00 1.93E+00 1.40E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Lanthanum-140 -2.51E-01 2.46E+00 1.53E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Lanthanum-140 -4.79E-03 2.59E+00 1.51E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Manganese-54 9.56E-01 1.61E+00 1.63E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Manganese-54 4.37E-02 1.76E+00 1.01E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Manganese-54 -9.62E-01 1.28E+00 1.34E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Manganese-54 -1.20E+00 1.57E+00 1.47E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Manganese-54 -7.87E-01 1.79E+00 1.21E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Manganese-54 7.45E-01 2.13E+00 1.24E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Manganese-54 4.14E-01 1.40E+00 8.32E-01 pCi/L 213

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Manganese-54 -1.44E-01 1.31E+00 7.82E-01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Manganese-54 -2.16E-01 1.52E+00 9.21E-01 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Manganese-54 -4.13E-02 1.66E+00 1.01E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Manganese-54 -3.83E-01 1.25E+00 1.16E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Manganese-54 -2.48E-01 1.26E+00 9.01E-01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Manganese-54 2.07E-01 1.57E+00 8.96E-01 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Manganese-54 -5.03E-01 1.36E+00 8.69E-01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Nickel-63 8.10E+00 1.68E+01 1.04E+01 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Nickel-63 8.69E+00 2.89E+01 1.77E+01 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Nickel-63 -1.41E-01 2.12E+01 1.26E+01 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Nickel-63 9.99E+00 2.59E+01 1.60E+01 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Nickel-63 -7.05E-01 3.23E+01 1.92E+01 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Nickel-63 -5.21E+00 3.30E+01 1.94E+01 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Nickel-63 -1.92E+00 1.49E+01 8.81E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Nickel-63 1.24E+01 3.46E+01 2.12E+01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Nickel-63 -1.28E+01 3.25E+01 1.89E+01 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Nickel-63 1.54E+01 4.36E+01 2.65E+01 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Nickel-63 1.46E+00 3.75E+01 2.24E+01 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Nickel-63 -4.46E+00 3.18E+01 1.88E+01 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Nickel-63 -1.40E+01 3.14E+01 1.82E+01 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Nickel-63 5.77E+00 2.46E+01 1.49E+01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Niobium-95 1.01E+00 1.91E+00 1.16E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Niobium-95 2.22E-01 1.75E+00 1.06E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Niobium-95 -1.74E+00 1.50E+00 2.10E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Niobium-95 -1.05E+00 1.66E+00 1.15E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Niobium-95 5.16E-01 1.94E+00 1.16E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Niobium-95 -6.47E-01 1.99E+00 1.24E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Niobium-95 3.97E-01 1.44E+00 8.54E-01 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Niobium-95 4.29E-01 1.59E+00 9.28E-01 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Niobium-95 1.41E+00 1.92E+00 1.23E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Niobium-95 7.44E-01 1.91E+00 1.15E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Niobium-95 2.37E-01 1.42E+00 8.43E-01 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Niobium-95 -1.84E-01 1.40E+00 1.38E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Niobium-95 1.46E-01 1.57E+00 1.45E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Niobium-95 5.68E-01 1.67E+00 9.85E-01 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Total Strontium -7.57E-01 1.62E+00 9.24E-01 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Total Strontium -2.18E-01 1.38E+00 8.10E-01 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Total Strontium -1.49E-01 3.33E+00 1.98E+00 pCi/L 214

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Total Strontium 2.19E-01 3.01E+00 1.81E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Total Strontium 9.52E-01 2.70E+00 1.67E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Total Strontium -1.98E+00 5.34E+00 3.12E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Total Strontium 5.28E+00 8.80E+00 6.03E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Total Strontium -4.54E-01 3.51E+00 2.07E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Total Strontium 1.03E+00 3.12E+00 1.92E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Total Strontium 2.21E+00 2.98E+00 1.91E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Total Strontium -4.10E+00 5.62E+00 3.20E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Total Strontium -3.03E-01 4.23E+00 2.51E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Total Strontium 1.18E+00 1.83E+00 1.18E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Total Strontium 1.41E+00 2.88E+00 1.79E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Tritium -6.28E+01 2.61E+02 1.52E+02 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Tritium -7.46E+01 3.08E+02 1.80E+02 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Tritium 4.76E+01 2.90E+02 1.76E+02 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Tritium -3.35E+01 2.41E+02 1.42E+02 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Tritium 1.40E+02 2.69E+02 1.69E+02 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Tritium 4.48E+01 3.05E+02 1.84E+02 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Tritium -4.48E+01 2.75E+02 1.62E+02 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Tritium 1.05E+02 2.61E+02 1.62E+02 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Tritium -6.79E+01 3.24E+02 1.90E+02 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Tritium -1.22E+02 2.76E+02 1.59E+02 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Tritium 2.21E+02 3.18E+02 2.08E+02 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Tritium 2.25E+01 2.52E+02 1.51E+02 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Tritium 8.90E+00 2.52E+02 1.50E+02 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Tritium 1.80E+02 3.65E+02 2.31E+02 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Zinc-65 1.18E-01 3.69E+00 2.22E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Zinc-65 -1.20E+00 3.48E+00 2.24E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Zinc-65 -1.51E+00 2.76E+00 1.87E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Zinc-65 9.39E-01 3.94E+00 2.35E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Zinc-65 2.24E+00 4.10E+00 2.47E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Zinc-65 -5.20E-01 3.83E+00 2.36E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Zinc-65 2.09E+00 3.24E+00 2.05E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Zinc-65 4.52E-01 3.18E+00 2.16E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Zinc-65 -1.61E+00 3.39E+00 2.32E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Zinc-65 1.65E+00 4.04E+00 4.92E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Zinc-65 1.82E+00 2.93E+00 1.89E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Zinc-65 -5.04E-01 2.73E+00 1.88E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Zinc-65 -3.42E+00 3.27E+00 3.59E+00 pCi/L 215

2020 DCPP REMP Analysis Results Appendix A 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Zinc-65 -1.62E+00 3.21E+00 2.19E+00 pCi/L 7C2 Rattlesnake Canyon(501627006) - SW 23-Jan-20 Zirconium-95 7.66E-01 3.27E+00 1.90E+00 pCi/L 7C2 Rattlesnake Canyon(503808002) - SW 18-Feb-20 Zirconium-95 -1.68E+00 2.75E+00 2.00E+00 pCi/L 7C2 Rattlesnake Canyon(505737002) - SW 3-Mar-20 Zirconium-95 5.49E-01 2.44E+00 1.46E+00 pCi/L 7C2 Rattlesnake Canyon(508947001) - SW 13-Apr-20 Zirconium-95 -1.72E+00 2.81E+00 1.95E+00 pCi/L 7C2 Rattlesnake Canyon(510649002) - SW 11-May-20 Zirconium-95 -7.15E-01 3.41E+00 2.15E+00 pCi/L 7C2 Rattlesnake Canyon(513548002) - SW 22-Jun-20 Zirconium-95 -9.82E-01 3.46E+00 2.14E+00 pCi/L 7C2 Rattlesnake Canyon(514719002) - SW 14-Jul-20 Zirconium-95 2.37E-01 2.53E+00 1.50E+00 pCi/L 7C2 Rattlesnake Canyon(517385002) - SW 10-Aug-20 Zirconium-95 -1.16E+00 2.54E+00 1.64E+00 pCi/L 7C2 Rattlesnake Canyon(519822001) - SW 1-Sep-20 Zirconium-95 7.75E-02 3.09E+00 1.81E+00 pCi/L 7C2 Rattlesnake Canyon(524334002) - SW 19-Oct-20 Zirconium-95 -2.28E-01 3.10E+00 1.90E+00 pCi/L 7C2 Rattlesnake Canyon(525420002) - SW 26-Oct-20 Zirconium-95 -3.51E-01 2.08E+00 1.29E+00 pCi/L 7C2 Rattlesnake Canyon(526083002) - SW 5-Nov-20 Zirconium-95 1.85E-01 2.45E+00 1.47E+00 pCi/L 7C2 Rattlesnake Canyon(526083004) - SW 5-Nov-20 Zirconium-95 -1.75E+00 2.35E+00 2.68E+00 pCi/L 7C2 Rattlesnake Canyon(528799002) - SW 2-Dec-20 Zirconium-95 -1.26E+00 2.38E+00 1.59E+00 pCi/L 7D1 Avila Gate - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7D1 Avila Gate(500231008) - AC 4-Jan-20 Iodine-131 -8.38E-05 6.77E-03 3.94E-03 pCi/m3 7D1 Avila Gate(500490013) - AC 11-Jan-20 Iodine-131 -3.45E-03 8.46E-03 6.01E-03 pCi/m3 7D1 Avila Gate(501031004) - AC 18-Jan-20 Iodine-131 5.22E-04 8.23E-03 5.30E-03 pCi/m3 7D1 Avila Gate(502000004) - AC 25-Jan-20 Iodine-131 -5.21E-04 7.82E-03 4.75E-03 pCi/m3 7D1 Avila Gate(502411004) - AC 1-Feb-20 Iodine-131 -4.15E-03 6.49E-03 5.34E-03 pCi/m3 7D1 Avila Gate(503155006) - AC 8-Feb-20 Iodine-131 -2.64E-03 1.08E-02 6.91E-03 pCi/m3 7D1 Avila Gate(503851004) - AC 15-Feb-20 Iodine-131 -6.64E-04 8.13E-03 5.01E-03 pCi/m3 7D1 Avila Gate(504528004) - AC 22-Feb-20 Iodine-131 -3.34E-04 6.66E-03 3.98E-03 pCi/m3 7D1 Avila Gate(505332013) - AC 29-Feb-20 Iodine-131 -4.53E-03 8.34E-03 6.89E-03 pCi/m3 7D1 Avila Gate(505759006) - AC 7-Mar-20 Iodine-131 -2.72E-03 7.00E-03 4.74E-03 pCi/m3 7D1 Avila Gate(506435004) - AC 14-Mar-20 Iodine-131 -2.27E-03 8.20E-03 5.28E-03 pCi/m3 7D1 Avila Gate(507015004) - AC 21-Mar-20 Iodine-131 -4.14E-03 8.25E-03 6.28E-03 pCi/m3 7D1 Avila Gate(507592013) - AC 27-Mar-20 Iodine-131 1.86E-03 1.02E-02 5.88E-03 pCi/m3 7D1 Avila Gate(508867004) - AC 4-Apr-20 Iodine-131 -9.80E-04 8.07E-03 4.98E-03 pCi/m3 7D1 Avila Gate(508984006) - AC 11-Apr-20 Iodine-131 -1.74E-03 1.33E-02 7.91E-03 pCi/m3 7D1 Avila Gate(509370006) - AC 18-Apr-20 Iodine-131 -4.50E-03 8.91E-03 6.00E-03 pCi/m3 7D1 Avila Gate(509745004) - AC 25-Apr-20 Iodine-131 2.31E-03 9.07E-03 4.93E-03 pCi/m3 7D1 Avila Gate(510179004) - AC 2-May-20 Iodine-131 -1.49E-03 6.65E-03 4.21E-03 pCi/m3 7D1 Avila Gate(510640004) - AC 9-May-20 Iodine-131 7.86E-04 8.29E-03 4.68E-03 pCi/m3 7D1 Avila Gate(510747004) - AC 16-May-20 Iodine-131 4.99E-04 1.06E-02 6.32E-03 pCi/m3 216

2020 DCPP REMP Analysis Results Appendix A 7D1 Avila Gate(511437004) - AC 23-May-20 Iodine-131 -1.46E-03 9.02E-03 5.53E-03 pCi/m3 7D1 Avila Gate(512099004) - AC 30-May-20 Iodine-131 -4.72E-03 1.14E-02 7.35E-03 pCi/m3 7D1 Avila Gate(512380004) - AC 6-Jun-20 Iodine-131 2.04E-03 8.12E-03 4.81E-03 pCi/m3 7D1 Avila Gate(513083006) - AC 13-Jun-20 Iodine-131 3.55E-03 1.07E-02 6.73E-03 pCi/m3 7D1 Avila Gate(513584004) - AC 20-Jun-20 Iodine-131 -1.37E-03 1.21E-02 7.39E-03 pCi/m3 7D1 Avila Gate(514894014) - AC 27-Jun-20 Iodine-131 1.60E-03 9.36E-03 5.40E-03 pCi/m3 7D1 Avila Gate(514398004) - AC 4-Jul-20 Iodine-131 -2.41E-04 7.69E-03 4.46E-03 pCi/m3 7D1 Avila Gate(514716012) - AC 11-Jul-20 Iodine-131 1.91E-04 8.77E-03 5.14E-03 pCi/m3 7D1 Avila Gate(515649006) - AC 18-Jul-20 Iodine-131 6.40E-04 1.27E-02 7.56E-03 pCi/m3 7D1 Avila Gate(517082004) - AC 25-Jul-20 Iodine-131 2.10E-04 8.12E-03 4.92E-03 pCi/m3 7D1 Avila Gate(516773004) - AC 1-Aug-20 Iodine-131 1.19E-03 8.83E-03 4.91E-03 pCi/m3 7D1 Avila Gate(517339021) - AC 8-Aug-20 Iodine-131 2.13E-03 8.38E-03 4.76E-03 pCi/m3 7D1 Avila Gate(517997006) - AC 15-Aug-20 Iodine-131 -1.70E-03 9.13E-03 6.66E-03 pCi/m3 7D1 Avila Gate(518816016) - AC 22-Aug-20 Iodine-131 2.00E-03 7.78E-03 4.30E-03 pCi/m3 7D1 Avila Gate(518822016) - AC 29-Aug-20 Iodine-131 -2.93E-03 8.90E-03 5.86E-03 pCi/m3 7D1 Avila Gate(520288004) - AC 5-Sep-20 Iodine-131 1.29E-03 9.85E-03 5.44E-03 pCi/m3 7D1 Avila Gate(520368004) - AC 12-Sep-20 Iodine-131 6.66E-03 1.14E-02 6.45E-03 pCi/m3 7D1 Avila Gate(521272004) - AC 19-Sep-20 Iodine-131 6.96E-03 1.31E-02 6.24E-03 pCi/m3 7D1 Avila Gate(521863004) - AC 26-Sep-20 Iodine-131 1.07E-02 1.07E-02 1.29E-02 pCi/m3 7D1 Avila Gate(522576006) - AC 3-Oct-20 Iodine-131 2.73E-03 1.10E-02 6.02E-03 pCi/m3 7D1 Avila Gate(524007006) - AC 10-Oct-20 Iodine-131 -1.73E-04 9.06E-03 5.59E-03 pCi/m3 7D1 Avila Gate(524009013) - AC 17-Oct-20 Iodine-131 9.32E-04 1.05E-02 5.91E-03 pCi/m3 7D1 Avila Gate(524695004) - AC 24-Oct-20 Iodine-131 4.10E-03 1.08E-02 6.32E-03 pCi/m3 7D1 Avila Gate(525830004) - AC 31-Oct-20 Iodine-131 -9.69E-04 8.43E-03 5.07E-03 pCi/m3 7D1 Avila Gate(526380013) - AC 7-Nov-20 Iodine-131 6.60E-03 1.26E-02 6.98E-03 pCi/m3 7D1 Avila Gate(527613004) - AC 14-Nov-20 Iodine-131 1.47E-03 8.86E-03 5.19E-03 pCi/m3 7D1 Avila Gate(527712004) - AC 21-Nov-20 Iodine-131 4.76E-03 1.14E-02 6.18E-03 pCi/m3 7D1 Avila Gate(528790013) - AC 28-Nov-20 Iodine-131 -6.50E-03 3.71E-03 5.67E-03 pCi/m3 7D1 Avila Gate(528845006) - AC 5-Dec-20 Iodine-131 -2.77E-03 1.04E-02 6.67E-03 pCi/m3 7D1 Avila Gate(529341004) - AC 12-Dec-20 Iodine-131 -4.34E-04 6.85E-03 4.27E-03 pCi/m3 7D1 Avila Gate(530196006) - AC 19-Dec-20 Iodine-131 3.75E-03 1.00E-02 7.65E-03 pCi/m3 7D1 Avila Gate(530951004) - AC 25-Dec-20 Iodine-131 8.78E-05 9.05E-03 5.47E-03 pCi/m3 7D1 Avila Gate - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7D1 Avila Gate(500231009) - AP 4-Jan-20 BETA 2.63E-02 2.28E-03 9.89E-03 pCi/m3 7D1 Avila Gate(500490014) - AP 11-Jan-20 BETA 8.73E-03 2.34E-03 1.13E-02 pCi/m3 7D1 Avila Gate(501031005) - AP 18-Jan-20 BETA 1.54E-02 2.22E-03 1.03E-02 pCi/m3 217

2020 DCPP REMP Analysis Results Appendix A 7D1 Avila Gate(502000005) - AP 25-Jan-20 BETA 1.24E-02 2.21E-03 1.40E-02 pCi/m3 7D1 Avila Gate(502411005) - AP 1-Feb-20 BETA 1.09E-02 2.16E-03 1.16E-02 pCi/m3 7D1 Avila Gate(503155007) - AP 8-Feb-20 BETA 2.09E-02 2.20E-03 1.01E-02 pCi/m3 7D1 Avila Gate(503851005) - AP 15-Feb-20 BETA 3.02E-02 2.16E-03 1.10E-02 pCi/m3 7D1 Avila Gate(504528005) - AP 22-Feb-20 BETA 3.33E-02 2.10E-03 1.12E-02 pCi/m3 7D1 Avila Gate(505332014) - AP 29-Feb-20 BETA 2.17E-02 2.17E-03 1.40E-02 pCi/m3 7D1 Avila Gate(505759007) - AP 7-Mar-20 BETA 1.28E-02 2.22E-03 1.20E-02 pCi/m3 7D1 Avila Gate(506435005) - AP 14-Mar-20 BETA 1.51E-02 2.01E-03 9.53E-03 pCi/m3 7D1 Avila Gate(507015005) - AP 21-Mar-20 BETA 1.26E-02 2.66E-03 1.11E-02 pCi/m3 7D1 Avila Gate(507592014) - AP 27-Mar-20 BETA 1.79E-02 2.45E-03 1.04E-02 pCi/m3 7D1 Avila Gate(508867005) - AP 4-Apr-20 BETA 1.09E-02 2.32E-03 9.02E-03 pCi/m3 7D1 Avila Gate(508984007) - AP 11-Apr-20 BETA 9.53E-03 2.42E-03 1.53E-02 pCi/m3 7D1 Avila Gate(509370007) - AP 18-Apr-20 BETA 1.96E-02 1.92E-03 1.03E-02 pCi/m3 7D1 Avila Gate(509745005) - AP 25-Apr-20 BETA 1.09E-02 2.05E-03 1.32E-02 pCi/m3 7D1 Avila Gate(510179005) - AP 2-May-20 BETA 1.55E-02 2.16E-03 1.23E-02 pCi/m3 7D1 Avila Gate(510640005) - AP 9-May-20 BETA 1.54E-02 2.75E-03 1.19E-02 pCi/m3 7D1 Avila Gate(510747005) - AP 16-May-20 BETA 1.36E-02 2.29E-03 1.08E-02 pCi/m3 7D1 Avila Gate(511437005) - AP 23-May-20 BETA 1.39E-02 2.60E-03 1.16E-02 pCi/m3 7D1 Avila Gate(512099005) - AP 30-May-20 BETA 6.81E-03 1.96E-03 1.03E-02 pCi/m3 7D1 Avila Gate(512380005) - AP 6-Jun-20 BETA 1.13E-02 2.30E-03 1.11E-02 pCi/m3 7D1 Avila Gate(513083007) - AP 13-Jun-20 BETA 8.76E-03 2.06E-03 1.06E-02 pCi/m3 7D1 Avila Gate(513584005) - AP 20-Jun-20 BETA 8.15E-03 2.20E-03 1.14E-02 pCi/m3 7D1 Avila Gate(514894004) - AP 27-Jun-20 BETA 6.39E-03 2.69E-03 1.26E-02 pCi/m3 7D1 Avila Gate(514398005) - AP 4-Jul-20 BETA 7.67E-03 1.98E-03 8.76E-03 pCi/m3 7D1 Avila Gate(514716013) - AP 11-Jul-20 BETA 1.48E-02 2.44E-03 1.02E-02 pCi/m3 7D1 Avila Gate(515649007) - AP 18-Jul-20 BETA 9.14E-03 2.53E-03 1.31E-02 pCi/m3 7D1 Avila Gate(517082005) - AP 25-Jul-20 BETA 9.83E-03 2.00E-03 9.21E-03 pCi/m3 7D1 Avila Gate(516773005) - AP 1-Aug-20 BETA 8.05E-03 2.25E-03 1.03E-02 pCi/m3 7D1 Avila Gate(517339022) - AP 8-Aug-20 BETA 8.43E-03 2.29E-03 1.14E-02 pCi/m3 7D1 Avila Gate(517997007) - AP 15-Aug-20 BETA 1.17E-02 2.29E-03 1.19E-02 pCi/m3 7D1 Avila Gate(518816017) - AP 22-Aug-20 BETA 1.41E-02 2.79E-03 1.30E-02 pCi/m3 7D1 Avila Gate(518822017) - AP 29-Aug-20 BETA 1.41E-02 2.19E-03 1.00E-02 pCi/m3 7D1 Avila Gate(520288005) - AP 5-Sep-20 BETA 2.99E-02 2.33E-03 1.06E-02 pCi/m3 7D1 Avila Gate(520368005) - AP 12-Sep-20 BETA 3.20E-02 2.23E-03 1.23E-02 pCi/m3 7D1 Avila Gate(521272005) - AP 19-Sep-20 BETA 9.29E-03 2.95E-03 1.56E-02 pCi/m3 7D1 Avila Gate(521863005) - AP 26-Sep-20 BETA 1.24E-02 2.90E-03 1.69E-02 pCi/m3 7D1 Avila Gate(522576007) - AP 3-Oct-20 BETA 2.46E-02 3.30E-03 1.79E-02 pCi/m3 7D1 Avila Gate(524007007) - AP 10-Oct-20 BETA 2.62E-02 2.25E-03 1.11E-02 pCi/m3 218

2020 DCPP REMP Analysis Results Appendix A 7D1 Avila Gate(524009014) - AP 17-Oct-20 BETA 3.21E-02 2.17E-03 1.04E-02 pCi/m3 7D1 Avila Gate(524695005) - AP 24-Oct-20 BETA 3.75E-02 2.31E-03 1.22E-02 pCi/m3 7D1 Avila Gate(525830005) - AP 31-Oct-20 BETA 7.54E-02 2.47E-03 1.29E-02 pCi/m3 7D1 Avila Gate(526380014) - AP 7-Nov-20 BETA 2.94E-02 2.52E-03 1.19E-02 pCi/m3 7D1 Avila Gate(527613005) - AP 14-Nov-20 BETA 2.57E-02 2.01E-03 1.03E-02 pCi/m3 7D1 Avila Gate(527712005) - AP 21-Nov-20 BETA 3.06E-02 2.76E-03 1.29E-02 pCi/m3 7D1 Avila Gate(528790014) - AP 28-Nov-20 BETA 3.62E-02 1.80E-03 9.67E-03 pCi/m3 7D1 Avila Gate(528845007) - AP 5-Dec-20 BETA 7.80E-02 2.22E-03 1.21E-02 pCi/m3 7D1 Avila Gate(529341005) - AP 12-Dec-20 BETA 3.20E-02 2.18E-03 1.13E-02 pCi/m3 7D1 Avila Gate(530196007) - AP 19-Dec-20 BETA 2.55E-02 2.54E-03 1.38E-02 pCi/m3 7D1 Avila Gate(530951005) - AP 25-Dec-20 BETA 2.52E-02 2.21E-03 1.04E-02 pCi/m3 7D1 Avila Gate(509974006) - AP 14-Feb-20 Cesium-134 -6.43E-05 4.05E-04 2.71E-04 pCi/m3 7D1 Avila Gate(516372004) - AP 15-May-20 Cesium-134 -9.83E-05 5.30E-04 3.90E-04 pCi/m3 7D1 Avila Gate(525316004) - AP 15-Aug-20 Cesium-134 -2.09E-04 3.49E-04 2.74E-04 pCi/m3 7D1 Avila Gate(532027004) - AP 14-Nov-20 Cesium-134 7.94E-05 5.86E-04 3.38E-04 pCi/m3 7D1 Avila Gate(509974006) - AP 14-Feb-20 Cesium-137 -2.54E-05 4.68E-04 2.88E-04 pCi/m3 7D1 Avila Gate(516372004) - AP 15-May-20 Cesium-137 -4.31E-05 4.10E-04 2.50E-04 pCi/m3 7D1 Avila Gate(525316004) - AP 15-Aug-20 Cesium-137 6.70E-05 3.39E-04 2.14E-04 pCi/m3 7D1 Avila Gate(532027004) - AP 14-Nov-20 Cesium-137 2.63E-04 5.46E-04 2.86E-04 pCi/m3 7D3 Avila Pier - Market Fish Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Cesium-134 3.49E+00 2.13E+01 1.63E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Cesium-134 -2.61E+00 4.12E+00 2.97E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Cesium-134 6.04E+00 1.94E+01 1.14E+01 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Cesium-134 -6.00E+00 1.68E+01 1.13E+01 pCi/kg 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Cesium-137 1.56E+01 1.69E+01 1.32E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Cesium-137 1.47E+01 3.69E+00 5.08E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Cesium-137 -3.25E-01 1.77E+01 1.17E+01 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Cesium-137 6.28E+00 1.73E+01 1.04E+01 pCi/kg 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Cobalt-58 -5.79E+00 1.68E+01 1.07E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Cobalt-58 -1.79E+00 3.83E+00 2.93E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Cobalt-58 2.19E+00 1.69E+01 9.87E+00 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Cobalt-58 -2.75E+00 1.44E+01 9.34E+00 pCi/kg 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Cobalt-60 -1.36E+00 1.91E+01 1.20E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Cobalt-60 8.42E-01 4.88E+00 2.94E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Cobalt-60 1.24E+01 1.89E+01 1.72E+01 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Cobalt-60 6.35E-01 1.81E+01 1.08E+01 pCi/kg 219

2020 DCPP REMP Analysis Results Appendix A 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Iron-59 1.32E+01 4.44E+01 2.60E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Iron-59 -2.85E+00 9.85E+00 6.43E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Iron-59 1.06E+01 3.67E+01 2.18E+01 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Iron-59 2.02E+01 4.11E+01 2.44E+01 pCi/kg 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Manganese-54 -1.00E+01 1.69E+01 1.18E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Manganese-54 3.19E-01 3.89E+00 2.45E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Manganese-54 6.78E-01 1.65E+01 9.74E+00 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Manganese-54 -2.94E+00 1.47E+01 8.84E+00 pCi/kg 7D3 Avila Pier(504740009) - FH Market 26-Feb-20 Zinc-65 1.09E+01 4.27E+01 2.81E+01 pCi/kg 7D3 Avila Pier(511002002) - FH Market 14-May-20 Zinc-65 8.92E+00 8.92E+00 9.75E+00 pCi/kg 7D3 Avila Pier(517473001) - FH Market 30-Jul-20 Zinc-65 1.04E+01 4.06E+01 2.42E+01 pCi/kg 7D3 Avila Pier(523223006) - FH Market 27-Oct-20 Zinc-65 -1.21E+00 3.87E+01 2.31E+01 pCi/kg 7E1 Avila Valley Barn - Vegetation Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7E1 Avila Valley Barn(505384002) - VG Brdleaf 5-Mar-20 Cesium-134 -3.85E+00 1.00E+01 8.74E+00 pCi/kg 7E1 Avila Valley Barn(509719001) - VG Brdleaf 20-Apr-20 Cesium-134 -6.74E-01 4.94E+00 3.09E+00 pCi/kg 7E1 Avila Valley Barn(516241002) - VG Brdleaf 28-Jul-20 Cesium-134 1.25E+00 4.11E+00 2.49E+00 pCi/kg 7E1 Avila Valley Barn(525938001) - VG Brdleaf 27-Oct-20 Cesium-134 1.39E+00 3.63E+00 2.11E+00 pCi/kg 7E1 Avila Valley Barn(505384002) - VG Brdleaf 5-Mar-20 Cesium-137 5.86E-01 8.36E+00 4.92E+00 pCi/kg 7E1 Avila Valley Barn(509719001) - VG Brdleaf 20-Apr-20 Cesium-137 -1.99E+00 3.77E+00 2.62E+00 pCi/kg 7E1 Avila Valley Barn(516241002) - VG Brdleaf 28-Jul-20 Cesium-137 1.01E+00 4.03E+00 2.43E+00 pCi/kg 7E1 Avila Valley Barn(525938001) - VG Brdleaf 27-Oct-20 Cesium-137 -1.17E+00 3.11E+00 1.95E+00 pCi/kg 7E1 Avila Valley Barn(505384002) - VG Brdleaf 5-Mar-20 Iodine-131 2.52E+00 1.11E+01 6.37E+00 pCi/kg 7E1 Avila Valley Barn(509719001) - VG Brdleaf 20-Apr-20 Iodine-131 1.12E+00 6.40E+00 3.68E+00 pCi/kg 7E1 Avila Valley Barn(516241002) - VG Brdleaf 28-Jul-20 Iodine-131 -1.53E-01 7.82E+00 4.63E+00 pCi/kg 7E1 Avila Valley Barn(525938001) - VG Brdleaf 27-Oct-20 Iodine-131 -3.73E+00 6.37E+00 4.46E+00 pCi/kg 7G1 Arroyo Grande - Vegetation Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 7G1 Arroyo Grande(500489003) - VG Brdleaf 13-Jan-20 Cesium-134 4.27E+00 1.55E+01 9.01E+00 pCi/kg 7G1 Arroyo Grande(502413002) - VG Brdleaf 4-Feb-20 Cesium-134 -3.37E+00 8.12E+00 6.56E+00 pCi/kg 7G1 Arroyo Grande(505216003) - VG Brdleaf 2-Mar-20 Cesium-134 -5.45E-01 8.23E+00 5.08E+00 pCi/kg 7G1 Arroyo Grande(508084003) - VG Brdleaf 6-Apr-20 Cesium-134 1.31E+00 1.31E+01 7.85E+00 pCi/kg 7G1 Arroyo Grande(510659002) - VG Brdleaf 4-May-20 Cesium-134 5.48E+00 8.52E+00 5.51E+00 pCi/kg 7G1 Arroyo Grande(512048003) - VG Brdleaf 1-Jun-20 Cesium-134 4.34E+00 9.78E+00 5.81E+00 pCi/kg 7G1 Arroyo Grande(514203003) - VG Brdleaf 6-Jul-20 Cesium-134 2.00E-01 8.48E+00 6.44E+00 pCi/kg 7G1 Arroyo Grande(517958004) - VG Brdleaf 11-Aug-20 Cesium-134 1.50E+00 4.53E+00 2.76E+00 pCi/kg 220

2020 DCPP REMP Analysis Results Appendix A 7G1 Arroyo Grande(520363003) - VG Brdleaf 8-Sep-20 Cesium-134 2.96E+00 7.82E+00 4.71E+00 pCi/kg 7G1 Arroyo Grande(523232002) - VG Brdleaf 5-Oct-20 Cesium-134 6.84E+00 9.71E+00 1.11E+01 pCi/kg 7G1 Arroyo Grande(525832002) - VG Brdleaf 2-Nov-20 Cesium-134 -8.83E-01 7.61E+00 4.79E+00 pCi/kg 7G1 Arroyo Grande(528798003) - VG Brdleaf 1-Dec-20 Cesium-134 -3.69E+00 8.70E+00 5.99E+00 pCi/kg 7G1 Arroyo Grande(500489003) - VG Brdleaf 13-Jan-20 Cesium-137 8.23E+00 1.48E+01 9.24E+00 pCi/kg 7G1 Arroyo Grande(502413002) - VG Brdleaf 4-Feb-20 Cesium-137 2.31E+00 7.65E+00 4.54E+00 pCi/kg 7G1 Arroyo Grande(505216003) - VG Brdleaf 2-Mar-20 Cesium-137 -7.85E-01 7.77E+00 4.75E+00 pCi/kg 7G1 Arroyo Grande(508084003) - VG Brdleaf 6-Apr-20 Cesium-137 -1.51E-01 1.06E+01 6.38E+00 pCi/kg 7G1 Arroyo Grande(510659002) - VG Brdleaf 4-May-20 Cesium-137 -7.79E+00 9.75E+00 9.37E+00 pCi/kg 7G1 Arroyo Grande(512048003) - VG Brdleaf 1-Jun-20 Cesium-137 -4.20E+00 8.94E+00 8.38E+00 pCi/kg 7G1 Arroyo Grande(514203003) - VG Brdleaf 6-Jul-20 Cesium-137 2.01E+00 7.04E+00 4.57E+00 pCi/kg 7G1 Arroyo Grande(517958004) - VG Brdleaf 11-Aug-20 Cesium-137 1.16E+00 3.81E+00 2.29E+00 pCi/kg 7G1 Arroyo Grande(520363003) - VG Brdleaf 8-Sep-20 Cesium-137 -3.38E+00 9.00E+00 6.98E+00 pCi/kg 7G1 Arroyo Grande(523232002) - VG Brdleaf 5-Oct-20 Cesium-137 -1.84E+00 8.46E+00 5.14E+00 pCi/kg 7G1 Arroyo Grande(525832002) - VG Brdleaf 2-Nov-20 Cesium-137 3.65E+00 6.93E+00 4.23E+00 pCi/kg 7G1 Arroyo Grande(528798003) - VG Brdleaf 1-Dec-20 Cesium-137 8.19E+00 8.19E+00 1.47E+01 pCi/kg 7G1 Arroyo Grande(500489003) - VG Brdleaf 13-Jan-20 Iodine-131 -1.94E+00 1.46E+01 8.75E+00 pCi/kg 7G1 Arroyo Grande(502413002) - VG Brdleaf 4-Feb-20 Iodine-131 1.70E+00 1.21E+01 7.00E+00 pCi/kg 7G1 Arroyo Grande(505216003) - VG Brdleaf 2-Mar-20 Iodine-131 3.46E+00 9.43E+00 5.98E+00 pCi/kg 7G1 Arroyo Grande(508084003) - VG Brdleaf 6-Apr-20 Iodine-131 1.83E+00 1.37E+01 7.89E+00 pCi/kg 7G1 Arroyo Grande(510659002) - VG Brdleaf 4-May-20 Iodine-131 -3.40E+00 8.33E+00 5.26E+00 pCi/kg 7G1 Arroyo Grande(512048003) - VG Brdleaf 1-Jun-20 Iodine-131 -3.25E+00 1.01E+01 6.26E+00 pCi/kg 7G1 Arroyo Grande(514203003) - VG Brdleaf 6-Jul-20 Iodine-131 -1.20E+00 8.97E+00 5.31E+00 pCi/kg 7G1 Arroyo Grande(517958004) - VG Brdleaf 11-Aug-20 Iodine-131 4.79E-01 6.26E+00 3.67E+00 pCi/kg 7G1 Arroyo Grande(520363003) - VG Brdleaf 8-Sep-20 Iodine-131 1.15E+00 1.06E+01 6.11E+00 pCi/kg 7G1 Arroyo Grande(523232002) - VG Brdleaf 5-Oct-20 Iodine-131 3.12E+00 9.98E+00 5.98E+00 pCi/kg 7G1 Arroyo Grande(525832002) - VG Brdleaf 2-Nov-20 Iodine-131 -2.59E-01 7.93E+00 4.61E+00 pCi/kg 7G1 Arroyo Grande(528798003) - VG Brdleaf 1-Dec-20 Iodine-131 -2.31E+00 1.02E+01 6.16E+00 pCi/kg 8S1 Target Range - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 8S1 Target Range(500231012) - AC 4-Jan-20 Iodine-131 -9.51E-04 5.75E-03 3.88E-03 pCi/m3 8S1 Target Range(500490003) - AC 11-Jan-20 Iodine-131 -2.39E-03 7.80E-03 5.35E-03 pCi/m3 8S1 Target Range(501031008) - AC 18-Jan-20 Iodine-131 -2.70E-03 8.74E-03 5.95E-03 pCi/m3 8S1 Target Range(502000008) - AC 25-Jan-20 Iodine-131 3.63E-03 7.22E-03 5.16E-03 pCi/m3 8S1 Target Range(502411008) - AC 1-Feb-20 Iodine-131 2.45E-03 8.70E-03 4.82E-03 pCi/m3 8S1 Target Range(503155010) - AC 8-Feb-20 Iodine-131 -9.85E-04 9.28E-03 5.56E-03 pCi/m3 8S1 Target Range(503851008) - AC 15-Feb-20 Iodine-131 1.27E-03 7.41E-03 4.27E-03 pCi/m3 221

2020 DCPP REMP Analysis Results Appendix A 8S1 Target Range(504528008) - AC 22-Feb-20 Iodine-131 2.71E-03 8.26E-03 4.81E-03 pCi/m3 8S1 Target Range(505332003) - AC 29-Feb-20 Iodine-131 -3.72E-03 8.12E-03 5.86E-03 pCi/m3 8S1 Target Range(505759010) - AC 7-Mar-20 Iodine-131 -1.97E-03 6.84E-03 4.36E-03 pCi/m3 8S1 Target Range(506435010) - AC 14-Mar-20 Iodine-131 7.35E-03 8.68E-03 9.97E-03 pCi/m3 8S1 Target Range(507015008) - AC 21-Mar-20 Iodine-131 5.46E-03 1.02E-02 6.38E-03 pCi/m3 8S1 Target Range(507592003) - AC 27-Mar-20 Iodine-131 1.03E-03 1.11E-02 6.56E-03 pCi/m3 8S1 Target Range(508867008) - AC 4-Apr-20 Iodine-131 -1.76E-03 6.10E-03 3.98E-03 pCi/m3 8S1 Target Range(508984012) - AC 11-Apr-20 Iodine-131 -2.37E-03 1.14E-02 7.06E-03 pCi/m3 8S1 Target Range(509370012) - AC 18-Apr-20 Iodine-131 3.25E-03 7.84E-03 4.43E-03 pCi/m3 8S1 Target Range(509745011) - AC 25-Apr-20 Iodine-131 -1.34E-03 8.43E-03 5.44E-03 pCi/m3 8S1 Target Range(510179008) - AC 2-May-20 Iodine-131 2.53E-04 1.06E-02 6.09E-03 pCi/m3 8S1 Target Range(510640008) - AC 9-May-20 Iodine-131 1.43E-03 6.86E-03 3.73E-03 pCi/m3 8S1 Target Range(510747010) - AC 16-May-20 Iodine-131 7.24E-04 8.07E-03 4.54E-03 pCi/m3 8S1 Target Range(511437008) - AC 23-May-20 Iodine-131 -2.65E-03 6.80E-03 4.73E-03 pCi/m3 8S1 Target Range(512099008) - AC 30-May-20 Iodine-131 -2.33E-03 1.68E-02 9.96E-03 pCi/m3 8S1 Target Range(512380008) - AC 6-Jun-20 Iodine-131 -8.22E-04 6.50E-03 3.94E-03 pCi/m3 8S1 Target Range(513083010) - AC 13-Jun-20 Iodine-131 -4.56E-04 7.45E-03 4.72E-03 pCi/m3 8S1 Target Range(513584008) - AC 20-Jun-20 Iodine-131 -2.01E-03 1.12E-02 6.99E-03 pCi/m3 8S1 Target Range(514894015) - AC 27-Jun-20 Iodine-131 -1.27E-03 1.02E-02 6.21E-03 pCi/m3 8S1 Target Range(514398010) - AC 4-Jul-20 Iodine-131 5.39E-03 1.16E-02 6.36E-03 pCi/m3 8S1 Target Range(514716016) - AC 11-Jul-20 Iodine-131 -2.13E-03 8.66E-03 5.54E-03 pCi/m3 8S1 Target Range(515649012) - AC 18-Jul-20 Iodine-131 -8.73E-04 8.12E-03 4.95E-03 pCi/m3 8S1 Target Range(517082008) - AC 25-Jul-20 Iodine-131 -5.13E-03 6.62E-03 5.46E-03 pCi/m3 8S1 Target Range(516773008) - AC 1-Aug-20 Iodine-131 -2.98E-03 1.54E-02 9.38E-03 pCi/m3 8S1 Target Range(517339025) - AC 8-Aug-20 Iodine-131 3.40E-03 8.94E-03 4.97E-03 pCi/m3 8S1 Target Range(517997012) - AC 15-Aug-20 Iodine-131 4.61E-04 8.80E-03 5.01E-03 pCi/m3 8S1 Target Range(518816020) - AC 22-Aug-20 Iodine-131 -2.45E-03 6.96E-03 4.65E-03 pCi/m3 8S1 Target Range(518822020) - AC 29-Aug-20 Iodine-131 -2.13E-03 8.02E-03 5.21E-03 pCi/m3 8S1 Target Range(520288010) - AC 5-Sep-20 Iodine-131 -1.60E-03 8.62E-03 5.63E-03 pCi/m3 8S1 Target Range(520368008) - AC 12-Sep-20 Iodine-131 3.45E-03 1.43E-02 7.82E-03 pCi/m3 8S1 Target Range(521272008) - AC 19-Sep-20 Iodine-131 2.89E-03 1.15E-02 6.23E-03 pCi/m3 8S1 Target Range(521863008) - AC 26-Sep-20 Iodine-131 7.00E-03 1.49E-02 8.12E-03 pCi/m3 8S1 Target Range(522576012) - AC 3-Oct-20 Iodine-131 -3.42E-04 1.04E-02 6.10E-03 pCi/m3 8S1 Target Range(524007010) - AC 10-Oct-20 Iodine-131 -5.64E-04 1.06E-02 6.34E-03 pCi/m3 8S1 Target Range(524009003) - AC 17-Oct-20 Iodine-131 3.87E-03 1.67E-02 9.38E-03 pCi/m3 8S1 Target Range(524695008) - AC 24-Oct-20 Iodine-131 7.02E-03 7.89E-03 9.60E-03 pCi/m3 8S1 Target Range(525830010) - AC 31-Oct-20 Iodine-131 2.62E-04 7.34E-03 4.66E-03 pCi/m3 8S1 Target Range(526380003) - AC 7-Nov-20 Iodine-131 7.48E-04 9.64E-03 5.49E-03 pCi/m3 222

2020 DCPP REMP Analysis Results Appendix A 8S1 Target Range(527613010) - AC 14-Nov-20 Iodine-131 2.86E-04 8.12E-03 4.74E-03 pCi/m3 8S1 Target Range(527712010) - AC 21-Nov-20 Iodine-131 3.76E-03 1.25E-02 6.89E-03 pCi/m3 8S1 Target Range(528790003) - AC 28-Nov-20 Iodine-131 -2.13E-03 5.83E-03 3.92E-03 pCi/m3 8S1 Target Range(528845012) - AC 5-Dec-20 Iodine-131 -1.67E-03 1.04E-02 6.37E-03 pCi/m3 8S1 Target Range(529341010) - AC 12-Dec-20 Iodine-131 -3.17E-04 7.32E-03 4.80E-03 pCi/m3 8S1 Target Range(530196012) - AC 19-Dec-20 Iodine-131 4.33E-03 8.59E-03 5.12E-03 pCi/m3 8S1 Target Range(530951010) - AC 25-Dec-20 Iodine-131 -6.04E-04 1.05E-02 6.52E-03 pCi/m3 8S1 Target Range - Air Carbon-14 Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 8S1 Target Range(500231014) - AC14 4-Jan-20 Carbon-14 2.97E-08 9.76E-08 5.87E-08 uCi/m3 8S1 Target Range(500490005) - AC14 11-Jan-20 Carbon-14 1.12E-07 1.17E-07 7.21E-08 uCi/m3 8S1 Target Range(501031010) - AC14 18-Jan-20 Carbon-14 5.14E-08 1.33E-07 8.02E-08 uCi/m3 8S1 Target Range(502000010) - AC14 25-Jan-20 Carbon-14 1.40E-07 1.33E-07 8.19E-08 uCi/m3 8S1 Target Range(502411010) - AC14 1-Feb-20 Carbon-14 6.11E-08 1.16E-07 7.02E-08 uCi/m3 8S1 Target Range(503155012) - AC14 8-Feb-20 Carbon-14 1.16E-07 1.41E-07 8.63E-08 uCi/m3 8S1 Target Range(503851010) - AC14 15-Feb-20 Carbon-14 1.21E-08 1.42E-07 8.45E-08 uCi/m3 8S1 Target Range(504528010) - AC14 22-Feb-20 Carbon-14 -4.29E-08 1.32E-07 7.76E-08 uCi/m3 8S1 Target Range(505332005) - AC14 29-Feb-20 Carbon-14 6.59E-08 1.28E-07 7.77E-08 uCi/m3 8S1 Target Range(505759012) - AC14 7-Mar-20 Carbon-14 1.16E-07 1.27E-07 7.79E-08 uCi/m3 8S1 Target Range(506435012) - AC14 14-Mar-20 Carbon-14 1.11E-07 1.20E-07 7.35E-08 uCi/m3 8S1 Target Range(507015010) - AC14 21-Mar-20 Carbon-14 1.33E-07 1.50E-07 9.17E-08 uCi/m3 8S1 Target Range(507592005) - AC14 27-Mar-20 Carbon-14 1.13E-07 1.17E-07 7.15E-08 uCi/m3 8S1 Target Range(508867010) - AC14 4-Apr-20 Carbon-14 9.84E-08 1.09E-07 6.68E-08 uCi/m3 8S1 Target Range(508984014) - AC14 11-Apr-20 Carbon-14 8.24E-08 1.57E-07 9.52E-08 uCi/m3 8S1 Target Range(509370014) - AC14 18-Apr-20 Carbon-14 6.83E-08 1.15E-07 6.96E-08 uCi/m3 8S1 Target Range(509745013) - AC14 25-Apr-20 Carbon-14 -1.14E-08 1.49E-07 8.88E-08 uCi/m3 8S1 Target Range(510179010) - AC14 2-May-20 Carbon-14 3.36E-08 1.29E-07 7.75E-08 uCi/m3 8S1 Target Range(510640010) - AC14 9-May-20 Carbon-14 8.34E-08 1.08E-07 6.60E-08 uCi/m3 8S1 Target Range(510747012) - AC14 16-May-20 Carbon-14 7.36E-08 1.24E-07 7.51E-08 uCi/m3 8S1 Target Range(511437010) - AC14 23-May-20 Carbon-14 1.42E-07 1.45E-07 8.89E-08 uCi/m3 8S1 Target Range(512099010) - AC14 30-May-20 Carbon-14 5.11E-08 1.29E-07 7.77E-08 uCi/m3 8S1 Target Range(512380010) - AC14 6-Jun-20 Carbon-14 9.26E-08 1.32E-07 8.01E-08 uCi/m3 8S1 Target Range(513083012) - AC14 13-Jun-20 Carbon-14 1.10E-07 1.47E-07 8.96E-08 uCi/m3 8S1 Target Range(513584010) - AC14 20-Jun-20 Carbon-14 1.01E-07 1.25E-07 7.64E-08 uCi/m3 8S1 Target Range(514894010) - AC14 27-Jun-20 Carbon-14 6.79E-08 1.58E-07 9.54E-08 uCi/m3 8S1 Target Range(514398012) - AC14 4-Jul-20 Carbon-14 9.26E-08 1.13E-07 6.87E-08 uCi/m3 8S1 Target Range(514716018) - AC14 11-Jul-20 Carbon-14 6.50E-08 1.75E-07 1.06E-07 uCi/m3 223

2020 DCPP REMP Analysis Results Appendix A 8S1 Target Range(515649014) - AC14 18-Jul-20 Carbon-14 -1.13E-07 1.90E-07 1.11E-07 uCi/m3 8S1 Target Range(517082010) - AC14 25-Jul-20 Carbon-14 9.13E-08 1.09E-07 6.66E-08 uCi/m3 8S1 Target Range(516773010) - AC14 1-Aug-20 Carbon-14 2.86E-07 1.41E-07 8.85E-08 uCi/m3 8S1 Target Range(517339029) - AC14 8-Aug-20 Carbon-14 1.57E-07 1.67E-07 1.02E-07 uCi/m3 8S1 Target Range(517997014) - AC14 15-Aug-20 Carbon-14 -1.04E-07 1.28E-07 7.46E-08 uCi/m3 8S1 Target Range(518816024) - AC14 22-Aug-20 Carbon-14 1.03E-07 1.30E-07 7.89E-08 uCi/m3 8S1 Target Range(518822022) - AC14 29-Aug-20 Carbon-14 -4.20E-08 1.24E-07 7.34E-08 uCi/m3 8S1 Target Range(520288012) - AC14 5-Sep-20 Carbon-14 2.65E-08 1.33E-07 7.99E-08 uCi/m3 8S1 Target Range(520368010) - AC14 12-Sep-20 Carbon-14 1.29E-07 1.46E-07 8.92E-08 uCi/m3 8S1 Target Range(521272010) - AC14 19-Sep-20 Carbon-14 -2.92E-08 1.31E-07 7.75E-08 uCi/m3 8S1 Target Range(521863010) - AC14 26-Sep-20 Carbon-14 3.73E-08 1.40E-07 8.39E-08 uCi/m3 8S1 Target Range(522576014) - AC14 3-Oct-20 Carbon-14 -4.86E-08 1.25E-07 7.36E-08 uCi/m3 8S1 Target Range(524007012) - AC14 10-Oct-20 Carbon-14 2.59E-07 1.24E-07 7.94E-08 uCi/m3 8S1 Target Range(524009005) - AC14 17-Oct-20 Carbon-14 2.73E-07 1.24E-07 7.95E-08 uCi/m3 8S1 Target Range(524695010) - AC14 24-Oct-20 Carbon-14 8.08E-08 1.28E-07 7.75E-08 uCi/m3 8S1 Target Range(525830012) - AC14 31-Oct-20 Carbon-14 9.64E-09 1.26E-07 7.54E-08 uCi/m3 8S1 Target Range(526380005) - AC14 7-Nov-20 Carbon-14 -2.15E-08 1.52E-07 9.01E-08 uCi/m3 8S1 Target Range(527613012) - AC14 14-Nov-20 Carbon-14 -4.07E-08 1.16E-07 6.85E-08 uCi/m3 8S1 Target Range(527712012) - AC14 21-Nov-20 Carbon-14 -1.16E-09 1.51E-07 8.98E-08 uCi/m3 8S1 Target Range(528790005) - AC14 28-Nov-20 Carbon-14 -3.06E-08 1.11E-07 6.57E-08 uCi/m3 8S1 Target Range(528845014) - AC14 5-Dec-20 Carbon-14 1.13E-07 1.32E-07 8.06E-08 uCi/m3 8S1 Target Range(529341012) - AC14 12-Dec-20 Carbon-14 -1.72E-09 1.38E-07 8.24E-08 uCi/m3 8S1 Target Range(530196014) - AC14 19-Dec-20 Carbon-14 5.13E-08 1.59E-07 9.57E-08 uCi/m3 8S1 Target Range(530951012) - AC14 25-Dec-20 Carbon-14 -1.95E-08 1.32E-07 7.83E-08 uCi/m3 8S1 Target Range - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 8S1 Target Range(500231013) - AP 4-Jan-20 BETA 2.12E-02 1.73E-03 9.65E-03 pCi/m3 8S1 Target Range(500490004) - AP 11-Jan-20 BETA 4.35E-03 2.37E-03 1.14E-02 pCi/m3 8S1 Target Range(501031009) - AP 18-Jan-20 BETA 1.44E-02 2.37E-03 1.08E-02 pCi/m3 8S1 Target Range(502000009) - AP 25-Jan-20 BETA 1.31E-02 2.63E-03 1.43E-02 pCi/m3 8S1 Target Range(502411009) - AP 1-Feb-20 BETA 1.00E-02 2.17E-03 1.20E-02 pCi/m3 8S1 Target Range(503155011) - AP 8-Feb-20 BETA 1.97E-02 2.13E-03 1.01E-02 pCi/m3 8S1 Target Range(503851009) - AP 15-Feb-20 BETA 2.77E-02 2.20E-03 1.10E-02 pCi/m3 8S1 Target Range(504528009) - AP 22-Feb-20 BETA 3.93E-02 2.68E-03 1.14E-02 pCi/m3 8S1 Target Range(505332004) - AP 29-Feb-20 BETA 1.68E-02 2.17E-03 1.39E-02 pCi/m3 8S1 Target Range(505759011) - AP 7-Mar-20 BETA 1.18E-02 2.85E-03 1.18E-02 pCi/m3 8S1 Target Range(506435011) - AP 14-Mar-20 BETA 1.48E-02 2.31E-03 9.71E-03 pCi/m3 224

2020 DCPP REMP Analysis Results Appendix A 8S1 Target Range(507015009) - AP 21-Mar-20 BETA 1.44E-02 2.56E-03 1.12E-02 pCi/m3 8S1 Target Range(507592004) - AP 27-Mar-20 BETA 1.87E-02 2.56E-03 1.08E-02 pCi/m3 8S1 Target Range(508867009) - AP 4-Apr-20 BETA 8.15E-03 1.88E-03 8.69E-03 pCi/m3 8S1 Target Range(508984013) - AP 11-Apr-20 BETA 8.06E-03 2.93E-03 1.55E-02 pCi/m3 8S1 Target Range(509370013) - AP 18-Apr-20 BETA 1.68E-02 1.90E-03 9.96E-03 pCi/m3 8S1 Target Range(509745012) - AP 25-Apr-20 BETA 8.81E-03 2.50E-03 1.32E-02 pCi/m3 8S1 Target Range(510179009) - AP 2-May-20 BETA 1.58E-02 2.33E-03 1.16E-02 pCi/m3 8S1 Target Range(510640009) - AP 9-May-20 BETA 1.14E-02 1.93E-03 9.73E-03 pCi/m3 8S1 Target Range(510747011) - AP 16-May-20 BETA 9.08E-03 2.32E-03 1.15E-02 pCi/m3 8S1 Target Range(511437009) - AP 23-May-20 BETA 1.32E-02 2.47E-03 1.14E-02 pCi/m3 8S1 Target Range(512099009) - AP 30-May-20 BETA 7.00E-03 2.34E-03 1.07E-02 pCi/m3 8S1 Target Range(512380009) - AP 6-Jun-20 BETA 8.78E-03 2.27E-03 1.11E-02 pCi/m3 8S1 Target Range(513083011) - AP 13-Jun-20 BETA 9.67E-03 2.23E-03 1.09E-02 pCi/m3 8S1 Target Range(513584009) - AP 20-Jun-20 BETA 7.81E-03 2.09E-03 1.14E-02 pCi/m3 8S1 Target Range(514894005) - AP 27-Jun-20 BETA 2.73E-03 2.48E-03 1.25E-02 pCi/m3 8S1 Target Range(514398011) - AP 4-Jul-20 BETA 8.38E-03 2.19E-03 8.98E-03 pCi/m3 8S1 Target Range(514716017) - AP 11-Jul-20 BETA 1.34E-02 2.26E-03 1.01E-02 pCi/m3 8S1 Target Range(515649013) - AP 18-Jul-20 BETA 7.93E-03 2.59E-03 1.27E-02 pCi/m3 8S1 Target Range(517082009) - AP 25-Jul-20 BETA 1.11E-02 1.93E-03 9.42E-03 pCi/m3 8S1 Target Range(516773009) - AP 1-Aug-20 BETA 7.49E-03 2.05E-03 1.02E-02 pCi/m3 8S1 Target Range(517339026) - AP 8-Aug-20 BETA 1.17E-02 2.16E-03 1.17E-02 pCi/m3 8S1 Target Range(517997013) - AP 15-Aug-20 BETA 1.44E-02 2.51E-03 1.26E-02 pCi/m3 8S1 Target Range(518816021) - AP 22-Aug-20 BETA 7.42E-03 2.69E-03 1.36E-02 pCi/m3 8S1 Target Range(518822021) - AP 29-Aug-20 BETA 1.71E-02 2.56E-03 1.05E-02 pCi/m3 8S1 Target Range(520288011) - AP 5-Sep-20 BETA 2.57E-02 2.13E-03 1.05E-02 pCi/m3 8S1 Target Range(520368009) - AP 12-Sep-20 BETA 3.35E-02 3.76E-03 1.93E-02 pCi/m3 8S1 Target Range(521272009) - AP 19-Sep-20 BETA 8.20E-03 3.33E-03 1.60E-02 pCi/m3 8S1 Target Range(521863009) - AP 26-Sep-20 BETA 6.22E-03 3.34E-03 1.79E-02 pCi/m3 8S1 Target Range(522576013) - AP 3-Oct-20 BETA 2.46E-02 3.27E-03 1.79E-02 pCi/m3 8S1 Target Range(524007011) - AP 10-Oct-20 BETA 2.34E-02 2.39E-03 1.25E-02 pCi/m3 8S1 Target Range(524009004) - AP 17-Oct-20 BETA 2.66E-02 2.16E-03 1.03E-02 pCi/m3 8S1 Target Range(524695009) - AP 24-Oct-20 BETA 3.41E-02 1.91E-03 1.19E-02 pCi/m3 8S1 Target Range(525830011) - AP 31-Oct-20 BETA 7.38E-02 1.90E-03 1.25E-02 pCi/m3 8S1 Target Range(526380004) - AP 7-Nov-20 BETA 2.85E-02 2.31E-03 1.09E-02 pCi/m3 8S1 Target Range(527613011) - AP 14-Nov-20 BETA 2.23E-02 2.05E-03 1.04E-02 pCi/m3 8S1 Target Range(527712011) - AP 21-Nov-20 BETA 2.45E-02 2.84E-03 1.31E-02 pCi/m3 8S1 Target Range(528790004) - AP 28-Nov-20 BETA 3.45E-02 1.98E-03 9.87E-03 pCi/m3 8S1 Target Range(528845013) - AP 5-Dec-20 BETA 6.96E-02 2.35E-03 1.22E-02 pCi/m3 225

2020 DCPP REMP Analysis Results Appendix A 8S1 Target Range(529341011) - AP 12-Dec-20 BETA 2.60E-02 2.23E-03 1.11E-02 pCi/m3 8S1 Target Range(530196013) - AP 19-Dec-20 BETA 2.78E-02 2.55E-03 1.39E-02 pCi/m3 8S1 Target Range(530951011) - AP 25-Dec-20 BETA 2.57E-02 2.09E-03 1.05E-02 pCi/m3 8S1 Target Range(509974002) - AP 14-Feb-20 Cesium-134 4.30E-05 7.56E-04 4.40E-04 pCi/m3 8S1 Target Range(516372005) - AP 15-May-20 Cesium-134 5.57E-06 8.58E-04 5.17E-04 pCi/m3 8S1 Target Range(525316005) - AP 15-Aug-20 Cesium-134 3.61E-05 4.04E-04 2.37E-04 pCi/m3 8S1 Target Range(532027005) - AP 14-Nov-20 Cesium-134 1.79E-04 5.82E-04 3.05E-04 pCi/m3 8S1 Target Range(509974002) - AP 14-Feb-20 Cesium-137 -1.31E-04 5.79E-04 3.73E-04 pCi/m3 8S1 Target Range(516372005) - AP 15-May-20 Cesium-137 2.63E-04 1.13E-03 6.38E-04 pCi/m3 8S1 Target Range(525316005) - AP 15-Aug-20 Cesium-137 2.29E-04 3.18E-04 2.03E-04 pCi/m3 8S1 Target Range(532027005) - AP 14-Nov-20 Cesium-137 -8.09E-05 5.07E-04 3.18E-04 pCi/m3 8S2 SW Site Boundary - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 8S2 SW Site Boundary(500231010) - AC 4-Jan-20 Iodine-131 3.33E-03 7.75E-03 4.12E-03 pCi/m3 8S2 SW Site Boundary(500490011) - AC 11-Jan-20 Iodine-131 -4.71E-03 6.61E-03 5.89E-03 pCi/m3 8S2 SW Site Boundary(501031006) - AC 18-Jan-20 Iodine-131 -2.41E-03 7.52E-03 5.40E-03 pCi/m3 8S2 SW Site Boundary(502000006) - AC 25-Jan-20 Iodine-131 -5.20E-03 9.16E-03 6.35E-03 pCi/m3 8S2 SW Site Boundary(502411006) - AC 1-Feb-20 Iodine-131 1.45E-03 9.99E-03 5.78E-03 pCi/m3 8S2 SW Site Boundary(503155008) - AC 8-Feb-20 Iodine-131 1.90E-03 1.10E-02 6.96E-03 pCi/m3 8S2 SW Site Boundary(503851006) - AC 15-Feb-20 Iodine-131 1.72E-03 9.84E-03 5.52E-03 pCi/m3 8S2 SW Site Boundary(504528006) - AC 22-Feb-20 Iodine-131 -2.90E-03 7.22E-03 4.80E-03 pCi/m3 8S2 SW Site Boundary(505332011) - AC 29-Feb-20 Iodine-131 1.20E-03 7.51E-03 4.79E-03 pCi/m3 8S2 SW Site Boundary(505759008) - AC 7-Mar-20 Iodine-131 2.44E-03 7.95E-03 4.29E-03 pCi/m3 8S2 SW Site Boundary(506435006) - AC 14-Mar-20 Iodine-131 2.65E-04 7.40E-03 4.25E-03 pCi/m3 8S2 SW Site Boundary(507015006) - AC 21-Mar-20 Iodine-131 3.95E-03 9.72E-03 5.50E-03 pCi/m3 8S2 SW Site Boundary(507592011) - AC 27-Mar-20 Iodine-131 -6.56E-04 9.34E-03 5.75E-03 pCi/m3 8S2 SW Site Boundary(508867006) - AC 4-Apr-20 Iodine-131 1.31E-03 9.30E-03 5.27E-03 pCi/m3 8S2 SW Site Boundary(508984008) - AC 11-Apr-20 Iodine-131 1.70E-03 1.09E-02 6.01E-03 pCi/m3 8S2 SW Site Boundary(509370008) - AC 18-Apr-20 Iodine-131 9.41E-04 6.87E-03 4.15E-03 pCi/m3 8S2 SW Site Boundary(509745014) - AC 25-Apr-20 Iodine-131 -7.51E-04 7.92E-03 4.77E-03 pCi/m3 8S2 SW Site Boundary(510179006) - AC 2-May-20 Iodine-131 -2.61E-05 7.02E-03 4.19E-03 pCi/m3 8S2 SW Site Boundary(510640006) - AC 9-May-20 Iodine-131 -1.80E-03 6.95E-03 5.36E-03 pCi/m3 8S2 SW Site Boundary(510747006) - AC 16-May-20 Iodine-131 9.60E-04 7.48E-03 4.25E-03 pCi/m3 8S2 SW Site Boundary(511437006) - AC 23-May-20 Iodine-131 4.22E-03 1.05E-02 5.88E-03 pCi/m3 8S2 SW Site Boundary(512099006) - AC 30-May-20 Iodine-131 -5.20E-04 9.66E-03 5.68E-03 pCi/m3 8S2 SW Site Boundary(512380006) - AC 6-Jun-20 Iodine-131 -4.72E-03 6.06E-03 4.99E-03 pCi/m3 8S2 SW Site Boundary(513083008) - AC 13-Jun-20 Iodine-131 -1.72E-03 7.18E-03 4.56E-03 pCi/m3 226

2020 DCPP REMP Analysis Results Appendix A 8S2 SW Site Boundary(513584006) - AC 20-Jun-20 Iodine-131 7.02E-03 1.58E-02 9.79E-03 pCi/m3 8S2 SW Site Boundary(514894016) - AC 27-Jun-20 Iodine-131 -5.26E-03 1.19E-02 8.34E-03 pCi/m3 8S2 SW Site Boundary(514398006) - AC 4-Jul-20 Iodine-131 -1.65E-03 6.74E-03 4.32E-03 pCi/m3 8S2 SW Site Boundary(514716014) - AC 11-Jul-20 Iodine-131 -3.91E-04 1.29E-02 7.50E-03 pCi/m3 8S2 SW Site Boundary(515649008) - AC 18-Jul-20 Iodine-131 -5.45E-03 1.08E-02 8.02E-03 pCi/m3 8S2 SW Site Boundary(517082006) - AC 25-Jul-20 Iodine-131 -1.28E-03 9.69E-03 5.77E-03 pCi/m3 8S2 SW Site Boundary(516773006) - AC 1-Aug-20 Iodine-131 -2.00E-03 7.42E-03 4.72E-03 pCi/m3 8S2 SW Site Boundary(517339023) - AC 8-Aug-20 Iodine-131 2.08E-03 8.27E-03 4.59E-03 pCi/m3 8S2 SW Site Boundary(517997008) - AC 15-Aug-20 Iodine-131 -4.40E-03 8.32E-03 6.04E-03 pCi/m3 8S2 SW Site Boundary(518816018) - AC 22-Aug-20 Iodine-131 -3.91E-05 8.44E-03 4.88E-03 pCi/m3 8S2 SW Site Boundary(518822018) - AC 29-Aug-20 Iodine-131 -1.33E-03 6.93E-03 4.42E-03 pCi/m3 8S2 SW Site Boundary(520288008) - AC 5-Sep-20 Iodine-131 -1.77E-03 8.38E-03 5.33E-03 pCi/m3 8S2 SW Site Boundary(520368006) - AC 12-Sep-20 Iodine-131 7.84E-04 9.11E-03 5.15E-03 pCi/m3 8S2 SW Site Boundary(521272006) - AC 19-Sep-20 Iodine-131 1.42E-03 1.14E-02 6.37E-03 pCi/m3 8S2 SW Site Boundary(521863006) - AC 26-Sep-20 Iodine-131 -1.84E-04 1.07E-02 6.18E-03 pCi/m3 8S2 SW Site Boundary(522576008) - AC 3-Oct-20 Iodine-131 -7.15E-04 1.26E-02 7.47E-03 pCi/m3 8S2 SW Site Boundary(524007008) - AC 10-Oct-20 Iodine-131 -2.36E-03 1.08E-02 7.53E-03 pCi/m3 8S2 SW Site Boundary(524009011) - AC 17-Oct-20 Iodine-131 -3.46E-03 1.14E-02 7.36E-03 pCi/m3 8S2 SW Site Boundary(524695006) - AC 24-Oct-20 Iodine-131 -8.74E-04 8.36E-03 5.20E-03 pCi/m3 8S2 SW Site Boundary(525830006) - AC 31-Oct-20 Iodine-131 3.08E-03 1.06E-02 6.04E-03 pCi/m3 8S2 SW Site Boundary(526380011) - AC 7-Nov-20 Iodine-131 -1.33E-03 9.87E-03 6.11E-03 pCi/m3 8S2 SW Site Boundary(527613006) - AC 14-Nov-20 Iodine-131 3.55E-03 1.05E-02 5.83E-03 pCi/m3 8S2 SW Site Boundary(527712006) - AC 21-Nov-20 Iodine-131 2.18E-03 1.17E-02 6.52E-03 pCi/m3 8S2 SW Site Boundary(528790011) - AC 28-Nov-20 Iodine-131 1.23E-03 6.44E-03 3.55E-03 pCi/m3 8S2 SW Site Boundary(528845008) - AC 5-Dec-20 Iodine-131 -9.45E-03 8.97E-03 1.00E-02 pCi/m3 8S2 SW Site Boundary(529341006) - AC 12-Dec-20 Iodine-131 2.60E-03 8.56E-03 4.99E-03 pCi/m3 8S2 SW Site Boundary(530196008) - AC 19-Dec-20 Iodine-131 4.42E-05 9.32E-03 5.66E-03 pCi/m3 8S2 SW Site Boundary(530951006) - AC 25-Dec-20 Iodine-131 2.01E-04 1.04E-02 6.01E-03 pCi/m3 8S2 SW Site Boundary - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 8S2 SW Site Boundary(500231011) - AP 4-Jan-20 BETA 1.96E-02 1.89E-03 9.72E-03 pCi/m3 8S2 SW Site Boundary(500490012) - AP 11-Jan-20 BETA 9.94E-03 2.59E-03 1.16E-02 pCi/m3 8S2 SW Site Boundary(501031007) - AP 18-Jan-20 BETA 1.50E-02 2.11E-03 1.06E-02 pCi/m3 8S2 SW Site Boundary(502000007) - AP 25-Jan-20 BETA 1.13E-02 2.39E-03 1.44E-02 pCi/m3 8S2 SW Site Boundary(502411007) - AP 1-Feb-20 BETA 1.52E-02 2.61E-03 1.21E-02 pCi/m3 8S2 SW Site Boundary(503155009) - AP 8-Feb-20 BETA 2.25E-02 2.64E-03 1.05E-02 pCi/m3 8S2 SW Site Boundary(503851007) - AP 15-Feb-20 BETA 2.92E-02 2.65E-03 1.14E-02 pCi/m3 227

2020 DCPP REMP Analysis Results Appendix A 8S2 SW Site Boundary(504528007) - AP 22-Feb-20 BETA 3.10E-02 2.22E-03 1.13E-02 pCi/m3 8S2 SW Site Boundary(505332012) - AP 29-Feb-20 BETA 2.10E-02 2.57E-03 1.44E-02 pCi/m3 8S2 SW Site Boundary(505759009) - AP 7-Mar-20 BETA 1.69E-02 2.63E-03 1.22E-02 pCi/m3 8S2 SW Site Boundary(506435007) - AP 14-Mar-20 BETA 1.62E-02 2.19E-03 9.69E-03 pCi/m3 8S2 SW Site Boundary(507015007) - AP 21-Mar-20 BETA 1.29E-02 2.43E-03 1.14E-02 pCi/m3 8S2 SW Site Boundary(507592012) - AP 27-Mar-20 BETA 2.55E-02 2.53E-03 1.09E-02 pCi/m3 8S2 SW Site Boundary(508867007) - AP 4-Apr-20 BETA 9.39E-03 2.13E-03 9.00E-03 pCi/m3 8S2 SW Site Boundary(508984009) - AP 11-Apr-20 BETA 7.41E-03 2.68E-03 1.54E-02 pCi/m3 8S2 SW Site Boundary(509370009) - AP 18-Apr-20 BETA 2.41E-02 2.18E-03 1.03E-02 pCi/m3 8S2 SW Site Boundary(509745015) - AP 25-Apr-20 BETA 6.60E-03 2.04E-03 1.31E-02 pCi/m3 8S2 SW Site Boundary(510179007) - AP 2-May-20 BETA 1.47E-02 2.25E-03 1.25E-02 pCi/m3 8S2 SW Site Boundary(510640007) - AP 9-May-20 BETA 1.19E-02 2.20E-03 1.17E-02 pCi/m3 8S2 SW Site Boundary(510747007) - AP 16-May-20 BETA 1.63E-02 2.67E-03 1.12E-02 pCi/m3 8S2 SW Site Boundary(511437007) - AP 23-May-20 BETA 1.23E-02 2.62E-03 1.16E-02 pCi/m3 8S2 SW Site Boundary(512099007) - AP 30-May-20 BETA 7.75E-03 1.99E-03 1.07E-02 pCi/m3 8S2 SW Site Boundary(512380007) - AP 6-Jun-20 BETA 1.30E-02 2.21E-03 1.08E-02 pCi/m3 8S2 SW Site Boundary(513083009) - AP 13-Jun-20 BETA 5.71E-03 2.27E-03 1.08E-02 pCi/m3 8S2 SW Site Boundary(513584007) - AP 20-Jun-20 BETA 3.76E-03 2.19E-03 1.13E-02 pCi/m3 8S2 SW Site Boundary(514894006) - AP 27-Jun-20 BETA 2.90E-03 2.45E-03 1.25E-02 pCi/m3 8S2 SW Site Boundary(514398007) - AP 4-Jul-20 BETA 8.32E-03 1.93E-03 8.53E-03 pCi/m3 8S2 SW Site Boundary(514716015) - AP 11-Jul-20 BETA 1.12E-02 2.27E-03 1.01E-02 pCi/m3 8S2 SW Site Boundary(515649009) - AP 18-Jul-20 BETA 8.51E-03 2.45E-03 1.28E-02 pCi/m3 8S2 SW Site Boundary(517082007) - AP 25-Jul-20 BETA 1.11E-02 1.89E-03 9.32E-03 pCi/m3 8S2 SW Site Boundary(516773007) - AP 1-Aug-20 BETA 5.63E-03 2.21E-03 1.01E-02 pCi/m3 8S2 SW Site Boundary(517339024) - AP 8-Aug-20 BETA 8.60E-03 2.23E-03 1.15E-02 pCi/m3 8S2 SW Site Boundary(517997009) - AP 15-Aug-20 BETA 9.83E-03 2.63E-03 1.20E-02 pCi/m3 8S2 SW Site Boundary(518816019) - AP 22-Aug-20 BETA 9.39E-03 2.77E-03 1.34E-02 pCi/m3 8S2 SW Site Boundary(518822019) - AP 29-Aug-20 BETA 1.39E-02 2.08E-03 9.99E-03 pCi/m3 8S2 SW Site Boundary(520288009) - AP 5-Sep-20 BETA 2.75E-02 2.23E-03 1.05E-02 pCi/m3 8S2 SW Site Boundary(520368007) - AP 12-Sep-20 BETA 1.91E-02 3.19E-03 1.46E-02 pCi/m3 8S2 SW Site Boundary(521272007) - AP 19-Sep-20 BETA 4.06E-03 2.73E-03 1.55E-02 pCi/m3 8S2 SW Site Boundary(521863007) - AP 26-Sep-20 BETA 7.02E-03 3.45E-03 1.68E-02 pCi/m3 8S2 SW Site Boundary(522576009) - AP 3-Oct-20 BETA 2.80E-02 3.09E-03 1.83E-02 pCi/m3 8S2 SW Site Boundary(524007009) - AP 10-Oct-20 BETA 1.77E-02 2.25E-03 1.09E-02 pCi/m3 8S2 SW Site Boundary(524009012) - AP 17-Oct-20 BETA 2.74E-02 2.27E-03 1.04E-02 pCi/m3 8S2 SW Site Boundary(524695007) - AP 24-Oct-20 BETA 3.40E-02 2.10E-03 1.20E-02 pCi/m3 8S2 SW Site Boundary(525830007) - AP 31-Oct-20 BETA 6.61E-02 2.29E-03 1.26E-02 pCi/m3 8S2 SW Site Boundary(526380012) - AP 7-Nov-20 BETA 2.55E-02 2.52E-03 1.18E-02 pCi/m3 228

2020 DCPP REMP Analysis Results Appendix A 8S2 SW Site Boundary(527613007) - AP 14-Nov-20 BETA 2.39E-02 1.89E-03 1.04E-02 pCi/m3 8S2 SW Site Boundary(527712007) - AP 21-Nov-20 BETA 3.39E-02 2.66E-03 1.30E-02 pCi/m3 8S2 SW Site Boundary(528790012) - AP 28-Nov-20 BETA 3.42E-02 1.96E-03 9.75E-03 pCi/m3 8S2 SW Site Boundary(528845009) - AP 5-Dec-20 BETA 6.61E-02 2.19E-03 1.18E-02 pCi/m3 8S2 SW Site Boundary(529341007) - AP 12-Dec-20 BETA 2.29E-02 2.15E-03 1.11E-02 pCi/m3 8S2 SW Site Boundary(530196009) - AP 19-Dec-20 BETA 2.66E-02 2.49E-03 1.39E-02 pCi/m3 8S2 SW Site Boundary(530951007) - AP 25-Dec-20 BETA 2.70E-02 2.23E-03 1.04E-02 pCi/m3 8S2 SW Site Boundary(509974005) - AP 14-Feb-20 Cesium-134 6.25E-05 4.98E-04 2.83E-04 pCi/m3 8S2 SW Site Boundary(516372006) - AP 15-May-20 Cesium-134 7.99E-05 4.60E-04 2.45E-04 pCi/m3 8S2 SW Site Boundary(525316006) - AP 15-Aug-20 Cesium-134 2.70E-04 4.02E-04 2.57E-04 pCi/m3 8S2 SW Site Boundary(532027006) - AP 14-Nov-20 Cesium-134 1.76E-04 3.94E-04 3.71E-04 pCi/m3 8S2 SW Site Boundary(509974005) - AP 14-Feb-20 Cesium-137 3.34E-04 3.34E-04 3.85E-04 pCi/m3 8S2 SW Site Boundary(516372006) - AP 15-May-20 Cesium-137 -1.53E-04 3.60E-04 2.74E-04 pCi/m3 8S2 SW Site Boundary(525316006) - AP 15-Aug-20 Cesium-137 -2.30E-05 2.67E-04 1.64E-04 pCi/m3 8S2 SW Site Boundary(532027006) - AP 14-Nov-20 Cesium-137 -1.95E-04 3.92E-04 2.79E-04 pCi/m3 8S3 DCSF96 Groundwater Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units 8S3 DCSF96-1(501846004) - GW 28-Jan-20 BETA 2.92E+00 2.05E+00 1.37E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 BETA 6.72E+00 1.30E+00 1.47E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 BETA 8.07E+00 2.04E+00 1.92E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 BETA 3.67E+00 1.55E+00 1.20E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Barium-140 -7.79E-01 7.23E+00 4.41E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Barium-140 1.10E-01 6.58E+00 3.95E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Barium-140 3.05E-01 8.96E+00 5.52E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Barium-140 8.83E-01 8.15E+00 4.78E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Cesium-134 7.37E-01 1.59E+00 9.27E-01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Cesium-134 -6.54E-01 1.62E+00 1.69E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Cesium-134 6.19E-01 1.79E+00 1.05E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Cesium-134 3.12E-01 1.85E+00 1.11E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Cesium-137 2.88E-01 1.51E+00 9.09E-01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Cesium-137 -4.61E-01 1.43E+00 9.30E-01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Cesium-137 -8.67E-02 1.61E+00 9.43E-01 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Cesium-137 5.57E-01 1.72E+00 1.02E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Cobalt-58 -5.05E-01 1.22E+00 7.83E-01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Cobalt-58 3.28E-01 1.40E+00 7.97E-01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Cobalt-58 -2.17E-03 1.53E+00 9.07E-01 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Cobalt-58 -3.86E-01 1.61E+00 1.08E+00 pCi/L 229

2020 DCPP REMP Analysis Results Appendix A 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Cobalt-60 -3.38E-01 1.45E+00 9.22E-01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Cobalt-60 2.28E-02 1.57E+00 9.38E-01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Cobalt-60 -4.47E-01 1.74E+00 1.07E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Cobalt-60 5.64E-01 1.98E+00 1.13E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Iodine-131 8.83E-01 2.67E+00 1.57E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Iodine-131 -6.83E-01 2.23E+00 1.38E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Iodine-131 -5.22E-01 3.29E+00 2.02E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Iodine-131 2.72E-01 2.97E+00 1.71E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Iron-55 2.71E+01 6.43E+01 4.88E+01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Iron-55 1.29E+01 6.66E+01 4.73E+01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Iron-55 -5.51E+00 4.18E+01 2.61E+01 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Iron-55 -2.22E+01 1.46E+02 9.29E+01 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Iron-59 -7.21E-01 2.77E+00 1.74E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Iron-59 2.06E+00 2.99E+00 2.47E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Iron-59 -3.25E-01 3.52E+00 2.17E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Iron-59 -8.81E-01 3.54E+00 2.17E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Lanthanum-140 -3.81E-01 2.29E+00 1.46E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Lanthanum-140 -4.61E-01 2.14E+00 1.37E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Lanthanum-140 -1.97E+00 3.00E+00 2.50E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Lanthanum-140 1.59E+00 3.10E+00 1.97E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Manganese-54 3.87E-02 1.45E+00 8.39E-01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Manganese-54 -9.36E-02 1.32E+00 7.71E-01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Manganese-54 4.01E-01 1.70E+00 9.97E-01 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Manganese-54 -4.54E-01 1.57E+00 1.15E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Nickel-63 1.18E+01 2.64E+01 1.64E+01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Nickel-63 -1.95E+01 3.59E+01 2.05E+01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Nickel-63 1.52E+01 2.89E+01 1.81E+01 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Nickel-63 -2.69E+00 3.51E+01 2.08E+01 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Niobium-95 6.88E-01 1.63E+00 1.01E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Niobium-95 2.20E-01 1.34E+00 8.14E-01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Niobium-95 8.71E-01 1.94E+00 1.16E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Niobium-95 2.05E-01 1.79E+00 1.07E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Total Strontium -6.26E-01 7.17E-01 3.63E-01 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Total Strontium 4.26E-01 1.31E+00 8.47E-01 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Total Strontium -1.38E+00 1.18E+00 5.43E-01 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Total Strontium -4.66E-01 1.64E+00 9.25E-01 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Tritium 9.78E+01 2.63E+02 1.62E+02 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Tritium 9.88E+01 2.83E+02 1.75E+02 pCi/L 230

2020 DCPP REMP Analysis Results Appendix A 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Tritium -1.36E+02 3.16E+02 1.82E+02 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Tritium -1.81E+02 2.82E+02 1.59E+02 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Zinc-65 -6.15E-01 2.77E+00 1.72E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Zinc-65 -8.18E-01 2.66E+00 1.69E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Zinc-65 4.78E-01 3.64E+00 2.17E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Zinc-65 6.31E-01 3.48E+00 2.22E+00 pCi/L 8S3 DCSF96-1(501846004) - GW 28-Jan-20 Zirconium-95 8.79E-01 2.69E+00 1.64E+00 pCi/L 8S3 DCSF96-1(510536004) - GW 5-May-20 Zirconium-95 -2.78E-01 2.34E+00 1.47E+00 pCi/L 8S3 DCSF96-1(515652001) - GW 22-Jul-20 Zirconium-95 2.59E-01 2.98E+00 1.74E+00 pCi/L 8S3 DCSF96-1(522579001) - GW 14-Oct-20 Zirconium-95 -3.67E-03 3.03E+00 1.84E+00 pCi/L AVA Avila Beach Sand Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units AVA Avila Beach(506490006) - SD 18-Mar-20 Barium-140 5.93E+01 2.19E+02 1.22E+02 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Barium-140 9.51E+01 2.42E+02 1.29E+02 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Cesium-134 9.04E+00 4.79E+01 2.61E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Cesium-134 -4.12E+00 5.39E+01 3.15E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Cesium-137 1.80E+01 4.98E+01 2.82E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Cesium-137 2.36E+01 6.76E+01 3.79E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Cobalt-58 6.60E+00 4.03E+01 2.20E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Cobalt-58 2.73E+00 4.06E+01 2.25E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Cobalt-60 -1.74E+01 4.27E+01 3.08E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Cobalt-60 1.76E+01 6.98E+01 4.25E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Iron-55 6.15E+03 1.45E+04 1.08E+04 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Iron-55 -2.07E+03 1.47E+04 1.13E+04 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Iron-59 2.99E-01 9.12E+01 5.38E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Iron-59 1.70E+01 1.20E+02 6.72E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Lanthanum-140 -5.92E+01 4.43E+01 5.20E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Lanthanum-140 1.17E+01 9.88E+01 5.45E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Manganese-54 2.17E+01 4.42E+01 2.39E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Manganese-54 -8.71E+00 6.19E+01 3.70E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Nickel-63 1.21E+03 2.59E+03 1.60E+03 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Nickel-63 -1.03E+02 2.25E+03 1.34E+03 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Niobium-95 -6.67E+00 4.34E+01 2.57E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Niobium-95 -6.43E+00 5.62E+01 3.31E+01 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Total Strontium -1.70E+02 5.50E+02 3.05E+02 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Total Strontium 1.51E+02 8.19E+02 5.11E+02 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Zinc-65 -1.51E+01 1.05E+02 7.55E+01 pCi/kg 231

2020 DCPP REMP Analysis Results Appendix A AVA Avila Beach(517337003) - SD 6-Aug-20 Zinc-65 6.83E+01 1.71E+02 1.03E+02 pCi/kg AVA Avila Beach(506490006) - SD 18-Mar-20 Zirconium-95 1.68E+01 8.09E+01 4.39E+01 pCi/kg AVA Avila Beach(517337003) - SD 6-Aug-20 Zirconium-95 3.23E+00 9.42E+01 5.65E+01 pCi/kg BCM Blanchard Cow Meat Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units BCM Blanchard Cow Meat(504709002) - MT 27-Feb-20 Cesium-134 1.81E+00 3.38E+00 2.00E+00 pCi/kg BCM Blanchard Cow Meat(510173004) - MT 30-Apr-20 Cesium-134 5.62E-01 4.44E+00 2.70E+00 pCi/kg BCM Blanchard Cow Meat(515133001) - MT 16-Jul-20 Cesium-134 1.10E+00 5.97E+00 3.48E+00 pCi/kg BCM Blanchard Cow Meat(524337001) - MT 22-Oct-20 Cesium-134 1.39E+00 3.85E+00 2.30E+00 pCi/kg BCM Blanchard Cow Meat(525422001) - MT 26-Oct-20 Cesium-134 -2.43E-01 4.69E+00 2.76E+00 pCi/kg BCM Blanchard Cow Meat(504709002) - MT 27-Feb-20 Cesium-137 2.04E-02 2.94E+00 1.80E+00 pCi/kg BCM Blanchard Cow Meat(510173004) - MT 30-Apr-20 Cesium-137 1.42E+00 4.04E+00 2.42E+00 pCi/kg BCM Blanchard Cow Meat(515133001) - MT 16-Jul-20 Cesium-137 1.21E+00 5.33E+00 3.45E+00 pCi/kg BCM Blanchard Cow Meat(524337001) - MT 22-Oct-20 Cesium-137 1.43E-01 3.48E+00 2.06E+00 pCi/kg BCM Blanchard Cow Meat(525422001) - MT 26-Oct-20 Cesium-137 1.21E+00 4.90E+00 2.80E+00 pCi/kg BCM Blanchard Cow Meat(504709002) - MT 27-Feb-20 Cobalt-58 -8.48E-01 2.71E+00 1.81E+00 pCi/kg BCM Blanchard Cow Meat(510173004) - MT 30-Apr-20 Cobalt-58 -1.05E-01 3.73E+00 2.32E+00 pCi/kg BCM Blanchard Cow Meat(515133001) - MT 16-Jul-20 Cobalt-58 -5.95E-01 5.22E+00 3.15E+00 pCi/kg BCM Blanchard Cow Meat(524337001) - MT 22-Oct-20 Cobalt-58 -1.04E+00 2.97E+00 1.95E+00 pCi/kg BCM Blanchard Cow Meat(525422001) - MT 26-Oct-20 Cobalt-58 -3.44E+00 4.06E+00 3.58E+00 pCi/kg BCM Blanchard Cow Meat(504709002) - MT 27-Feb-20 Cobalt-60 7.94E-01 3.45E+00 2.01E+00 pCi/kg BCM Blanchard Cow Meat(510173004) - MT 30-Apr-20 Cobalt-60 6.90E-01 4.37E+00 2.56E+00 pCi/kg BCM Blanchard Cow Meat(515133001) - MT 16-Jul-20 Cobalt-60 -6.23E-01 5.97E+00 3.54E+00 pCi/kg BCM Blanchard Cow Meat(524337001) - MT 22-Oct-20 Cobalt-60 -4.65E-01 3.83E+00 2.35E+00 pCi/kg BCM Blanchard Cow Meat(525422001) - MT 26-Oct-20 Cobalt-60 -9.91E-01 5.32E+00 3.38E+00 pCi/kg BCM Blanchard Cow Meat(504709002) - MT 27-Feb-20 Iodine-131 -2.90E-01 4.03E+00 2.69E+00 pCi/kg BCM Blanchard Cow Meat(510173004) - MT 30-Apr-20 Iodine-131 -1.10E+00 4.84E+00 2.92E+00 pCi/kg BCM Blanchard Cow Meat(515133001) - MT 16-Jul-20 Iodine-131 -3.49E+00 7.92E+00 5.25E+00 pCi/kg BCM Blanchard Cow Meat(524337001) - MT 22-Oct-20 Iodine-131 7.44E-02 4.80E+00 2.92E+00 pCi/kg BCM Blanchard Cow Meat(525422001) - MT 26-Oct-20 Iodine-131 -1.04E+00 4.91E+00 3.03E+00 pCi/kg BCM Blanchard Cow Meat(504709002) - MT 27-Feb-20 Total Strontium 1.62E+01 6.54E+01 4.05E+01 pCi/kg BCM Blanchard Cow Meat(510173004) - MT 30-Apr-20 Total Strontium 1.60E+00 6.91E+01 4.14E+01 pCi/kg BCM Blanchard Cow Meat(515133001) - MT 16-Jul-20 Total Strontium 1.73E+01 1.49E+02 8.99E+01 pCi/kg BCM Blanchard Cow Meat(524337001) - MT 22-Oct-20 Total Strontium -4.73E+01 6.89E+01 3.59E+01 pCi/kg BCM Blanchard Cow Meat(525422001) - MT 26-Oct-20 Total Strontium -4.75E+01 7.15E+01 3.65E+01 pCi/kg 232

2020 DCPP REMP Analysis Results Appendix A CBA Cambria Moonstone Beach Sand Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Barium-140 3.08E+01 2.72E+02 1.49E+02 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Barium-140 -3.80E+01 1.30E+02 8.37E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Cesium-134 -3.36E+00 5.75E+01 3.49E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Cesium-134 -1.63E+01 2.46E+01 2.08E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Cesium-137 1.70E+01 5.53E+01 3.03E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Cesium-137 1.33E+01 4.41E+01 2.38E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Cobalt-58 -8.45E+00 2.85E+01 2.03E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Cobalt-58 3.70E+00 3.43E+01 2.02E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Cobalt-60 -1.24E+01 3.96E+01 2.79E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Cobalt-60 3.41E+00 4.07E+01 2.27E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Iron-55 6.87E+03 1.54E+04 1.15E+04 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Iron-55 1.40E+03 1.55E+04 1.19E+04 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Iron-59 1.30E+01 9.11E+01 4.93E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Iron-59 -7.05E+00 8.61E+01 5.03E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Lanthanum-140 -6.16E+01 9.69E+01 8.33E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Lanthanum-140 -1.79E+01 5.07E+01 3.74E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Manganese-54 -1.40E+01 3.87E+01 2.52E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Manganese-54 1.28E+01 4.08E+01 2.22E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Nickel-63 1.22E+03 2.66E+03 1.64E+03 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Nickel-63 -1.59E+03 2.21E+03 1.27E+03 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Niobium-95 -9.35E+00 4.59E+01 2.95E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Niobium-95 -4.77E+00 4.71E+01 2.78E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Total Strontium -2.45E+02 4.14E+02 2.01E+02 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Total Strontium 3.01E+02 6.98E+02 4.74E+02 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Zinc-65 -2.36E+01 8.26E+01 6.37E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Zinc-65 3.60E+01 9.46E+01 5.32E+01 pCi/kg CBA Cambria Moonstone Beach(506490005) - SD 18-Mar-20 Zirconium-95 1.48E+01 8.11E+01 4.49E+01 pCi/kg CBA Cambria Moonstone Beach(517337010) - SD 6-Aug-20 Zirconium-95 -6.84E-01 6.90E+01 4.04E+01 pCi/kg CCM Control Cow Meat Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units CCM Control Cow Meat(505071001) - MT 26-Feb-20 Cesium-134 1.51E-01 4.16E+00 2.41E+00 pCi/kg CCM Control Cow Meat(509719002) - MT 20-Apr-20 Cesium-134 -1.06E+00 3.85E+00 2.50E+00 pCi/kg CCM Control Cow Meat(516241001) - MT 28-Jul-20 Cesium-134 1.91E+00 5.07E+00 2.94E+00 pCi/kg CCM Control Cow Meat(505071001) - MT 26-Feb-20 Cesium-137 2.58E+00 3.79E+00 2.45E+00 pCi/kg CCM Control Cow Meat(509719002) - MT 20-Apr-20 Cesium-137 2.99E+00 2.99E+00 4.80E+00 pCi/kg 233

2020 DCPP REMP Analysis Results Appendix A CCM Control Cow Meat(516241001) - MT 28-Jul-20 Cesium-137 -9.20E-02 4.30E+00 2.64E+00 pCi/kg CCM Control Cow Meat(505071001) - MT 26-Feb-20 Cobalt-58 -9.59E-01 3.70E+00 2.26E+00 pCi/kg CCM Control Cow Meat(509719002) - MT 20-Apr-20 Cobalt-58 2.84E-01 3.45E+00 2.10E+00 pCi/kg CCM Control Cow Meat(516241001) - MT 28-Jul-20 Cobalt-58 1.09E+00 4.70E+00 2.69E+00 pCi/kg CCM Control Cow Meat(505071001) - MT 26-Feb-20 Cobalt-60 2.46E+00 4.55E+00 2.76E+00 pCi/kg CCM Control Cow Meat(509719002) - MT 20-Apr-20 Cobalt-60 -2.51E-01 3.85E+00 2.33E+00 pCi/kg CCM Control Cow Meat(516241001) - MT 28-Jul-20 Cobalt-60 -9.89E-01 4.16E+00 2.63E+00 pCi/kg CCM Control Cow Meat(505071001) - MT 26-Feb-20 Iodine-131 1.73E+00 6.82E+00 4.05E+00 pCi/kg CCM Control Cow Meat(509719002) - MT 20-Apr-20 Iodine-131 -2.25E+00 5.24E+00 3.32E+00 pCi/kg CCM Control Cow Meat(516241001) - MT 28-Jul-20 Iodine-131 6.95E-01 9.23E+00 5.41E+00 pCi/kg CCM Control Cow Meat(505071001) - MT 26-Feb-20 Total Strontium 3.55E+01 9.79E+01 6.14E+01 pCi/kg CCM Control Cow Meat(509719002) - MT 20-Apr-20 Total Strontium -8.42E+01 1.42E+02 7.68E+01 pCi/kg CCM Control Cow Meat(516241001) - MT 28-Jul-20 Total Strontium 4.69E+01 1.55E+02 9.59E+01 pCi/kg CYA Cayucos Beach Sand Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units CYA Cayucos Beach(506490004) - SD 18-Mar-20 Barium-140 -3.50E-01 1.73E+02 1.04E+02 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Barium-140 1.23E+01 1.89E+02 1.10E+02 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Cesium-134 1.27E+01 3.80E+01 2.08E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Cesium-134 7.42E+00 4.37E+01 2.67E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Cesium-137 1.15E+01 4.11E+01 2.25E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Cesium-137 3.41E+01 3.41E+01 2.29E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Cobalt-58 2.07E+00 3.42E+01 1.96E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Cobalt-58 4.45E+00 3.75E+01 2.08E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Cobalt-60 2.51E+00 3.88E+01 2.55E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Cobalt-60 -6.87E+00 2.87E+01 1.90E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Iron-55 -3.07E+02 1.67E+04 1.22E+04 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Iron-55 5.04E+03 1.55E+04 1.20E+04 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Iron-59 -1.67E+01 6.59E+01 4.16E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Iron-59 3.88E+01 1.12E+02 6.18E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Lanthanum-140 -1.08E+01 4.36E+01 3.02E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Lanthanum-140 5.44E+00 7.92E+01 4.52E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Manganese-54 1.11E+01 3.70E+01 2.05E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Manganese-54 6.33E+00 4.04E+01 2.23E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Nickel-63 6.47E+02 2.60E+03 1.57E+03 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Nickel-63 -1.65E+03 2.23E+03 1.28E+03 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Niobium-95 -4.39E+00 3.13E+01 2.18E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Niobium-95 -3.88E+00 4.72E+01 2.76E+01 pCi/kg 234

2020 DCPP REMP Analysis Results Appendix A CYA Cayucos Beach(506490004) - SD 18-Mar-20 Total Strontium 9.93E+00 3.80E+02 2.28E+02 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Total Strontium -2.16E+02 7.12E+02 3.84E+02 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Zinc-65 -1.04E+01 8.88E+01 5.26E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Zinc-65 -4.12E+01 9.25E+01 7.66E+01 pCi/kg CYA Cayucos Beach(506490004) - SD 18-Mar-20 Zirconium-95 -2.54E+00 6.25E+01 3.66E+01 pCi/kg CYA Cayucos Beach(517337005) - SD 6-Aug-20 Zirconium-95 2.94E+01 8.29E+01 4.47E+01 pCi/kg DCM Diablo Cove Marine - Aquatic Vegetation Kelp Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DCM Diablo Cove Marine(501627004) - AV Kelp 23-Jan-20 Cesium-134 -4.06E+00 9.63E+00 6.36E+00 pCi/kg DCM Diablo Cove Marine(509770003) - AV Kelp 13-Apr-20 Cesium-134 1.42E+00 1.03E+01 6.36E+00 pCi/kg DCM Diablo Cove Marine(514717001) - AV Kelp 14-Jul-20 Cesium-134 1.99E-01 1.65E+01 9.95E+00 pCi/kg DCM Diablo Cove Marine(522578001) - AV Kelp 19-Oct-20 Cesium-134 -6.16E+00 8.81E+00 7.56E+00 pCi/kg DCM Diablo Cove Marine(525420007) - AV Kelp 26-Oct-20 Cesium-134 -9.16E-01 9.04E+00 5.70E+00 pCi/kg DCM Diablo Cove Marine(501627004) - AV Kelp 23-Jan-20 Cesium-137 -4.70E+00 9.01E+00 6.01E+00 pCi/kg DCM Diablo Cove Marine(509770003) - AV Kelp 13-Apr-20 Cesium-137 -2.64E+00 8.12E+00 6.08E+00 pCi/kg DCM Diablo Cove Marine(514717001) - AV Kelp 14-Jul-20 Cesium-137 8.92E+00 1.44E+01 8.68E+00 pCi/kg DCM Diablo Cove Marine(522578001) - AV Kelp 19-Oct-20 Cesium-137 8.33E+00 8.33E+00 1.09E+01 pCi/kg DCM Diablo Cove Marine(525420007) - AV Kelp 26-Oct-20 Cesium-137 -4.28E-01 8.94E+00 5.85E+00 pCi/kg DCM Diablo Cove Marine(501627004) - AV Kelp 23-Jan-20 Cobalt-58 3.49E+00 1.04E+01 6.09E+00 pCi/kg DCM Diablo Cove Marine(509770003) - AV Kelp 13-Apr-20 Cobalt-58 1.89E+00 1.10E+01 6.34E+00 pCi/kg DCM Diablo Cove Marine(514717001) - AV Kelp 14-Jul-20 Cobalt-58 -8.66E+00 1.27E+01 9.57E+00 pCi/kg DCM Diablo Cove Marine(522578001) - AV Kelp 19-Oct-20 Cobalt-58 5.81E-01 8.82E+00 5.40E+00 pCi/kg DCM Diablo Cove Marine(525420007) - AV Kelp 26-Oct-20 Cobalt-58 -2.62E+00 9.11E+00 6.79E+00 pCi/kg DCM Diablo Cove Marine(501627004) - AV Kelp 23-Jan-20 Cobalt-60 8.85E+00 1.37E+01 8.24E+00 pCi/kg DCM Diablo Cove Marine(509770003) - AV Kelp 13-Apr-20 Cobalt-60 4.80E+00 1.13E+01 6.72E+00 pCi/kg DCM Diablo Cove Marine(514717001) - AV Kelp 14-Jul-20 Cobalt-60 1.91E+01 2.35E+01 1.97E+01 pCi/kg DCM Diablo Cove Marine(522578001) - AV Kelp 19-Oct-20 Cobalt-60 -2.47E-01 1.13E+01 6.72E+00 pCi/kg DCM Diablo Cove Marine(525420007) - AV Kelp 26-Oct-20 Cobalt-60 8.29E+00 1.20E+01 7.37E+00 pCi/kg DCM Diablo Cove Marine - Fish Perch Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Cesium-134 1.21E+00 1.87E+01 1.14E+01 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Cesium-134 1.43E-01 1.93E+01 1.34E+01 pCi/kg DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Cesium-134 2.63E+01 2.63E+01 3.07E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Cesium-134 9.83E+00 2.20E+01 1.44E+01 pCi/kg DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Cesium-137 -8.17E-01 1.63E+01 9.98E+00 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Cesium-137 -3.22E+00 2.00E+01 1.64E+01 pCi/kg 235

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Cesium-137 1.74E+01 2.42E+01 1.68E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Cesium-137 4.18E+00 2.32E+01 1.68E+01 pCi/kg DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Cobalt-58 -1.15E+00 1.74E+01 1.09E+01 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Cobalt-58 -7.99E+00 1.78E+01 1.24E+01 pCi/kg DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Cobalt-58 -9.91E+00 2.05E+01 1.47E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Cobalt-58 7.49E+00 2.34E+01 1.39E+01 pCi/kg DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Cobalt-60 7.30E+00 1.99E+01 1.14E+01 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Cobalt-60 9.81E+00 2.37E+01 1.42E+01 pCi/kg DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Cobalt-60 4.96E+00 2.44E+01 1.42E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Cobalt-60 -6.50E-01 2.27E+01 1.94E+01 pCi/kg DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Iron-59 1.74E+00 4.44E+01 2.58E+01 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Iron-59 -2.66E+00 4.18E+01 2.50E+01 pCi/kg DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Iron-59 1.47E+01 5.31E+01 3.42E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Iron-59 -1.92E+01 4.02E+01 2.90E+01 pCi/kg DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Manganese-54 -3.97E+00 1.75E+01 1.14E+01 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Manganese-54 -4.46E+00 1.88E+01 1.20E+01 pCi/kg DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Manganese-54 7.97E+00 2.19E+01 1.34E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Manganese-54 9.23E+00 2.26E+01 1.37E+01 pCi/kg DCM Diablo Cove Marine(504740007) - FH Perch 20-Feb-20 Zinc-65 -2.32E+01 3.86E+01 3.10E+01 pCi/kg DCM Diablo Cove Marine(513081001) - FH Perch 10-Jun-20 Zinc-65 -1.06E+01 4.23E+01 2.63E+01 pCi/kg DCM Diablo Cove Marine(517473003) - FH Perch 28-Jul-20 Zinc-65 -4.29E+00 5.17E+01 3.54E+01 pCi/kg DCM Diablo Cove Marine(523223001) - FH Perch 19-Oct-20 Zinc-65 9.10E+00 4.44E+01 2.67E+01 pCi/kg DCM Diablo Cove Marine - Rockfish Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Cesium-134 -1.40E+01 2.33E+01 2.17E+01 pCi/kg DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Cesium-134 -3.71E+00 2.65E+01 1.71E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Cesium-134 6.03E+00 2.44E+01 1.47E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Cesium-134 3.39E+00 1.93E+01 1.17E+01 pCi/kg DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Cesium-137 7.93E+00 2.20E+01 1.57E+01 pCi/kg DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Cesium-137 -3.96E+00 2.57E+01 1.64E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Cesium-137 5.23E+00 1.99E+01 2.32E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Cesium-137 7.87E+00 1.65E+01 1.98E+01 pCi/kg DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Cobalt-58 -1.07E+01 2.26E+01 1.59E+01 pCi/kg DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Cobalt-58 -7.73E+00 2.43E+01 1.65E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Cobalt-58 1.67E+00 2.18E+01 1.33E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Cobalt-58 -3.30E+00 1.70E+01 1.10E+01 pCi/kg DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Cobalt-60 -6.33E+00 2.95E+01 1.85E+01 pCi/kg 236

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Cobalt-60 -8.16E+00 1.88E+01 1.54E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Cobalt-60 9.24E+00 3.14E+01 1.86E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Cobalt-60 3.16E+00 2.00E+01 1.16E+01 pCi/kg DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Iron-59 5.34E-01 5.78E+01 3.36E+01 pCi/kg DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Iron-59 -2.66E+01 4.79E+01 3.38E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Iron-59 1.60E+01 4.75E+01 3.06E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Iron-59 1.26E+01 4.80E+01 2.76E+01 pCi/kg DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Manganese-54 5.09E+00 2.34E+01 1.38E+01 pCi/kg DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Manganese-54 -1.00E+01 2.35E+01 1.65E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Manganese-54 -1.04E+00 2.16E+01 1.34E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Manganese-54 5.16E+00 1.93E+01 1.17E+01 pCi/kg DCM Diablo Cove Marine(504740003) - FH Rockfsh 20-Feb-20 Zinc-65 2.60E+01 6.30E+01 3.78E+01 pCi/kg DCM Diablo Cove Marine(513081008) - FH Rockfsh 10-Jun-20 Zinc-65 -1.13E-01 5.56E+01 3.33E+01 pCi/kg DCM Diablo Cove Marine(517473004) - FH Rockfsh 28-Jul-20 Zinc-65 7.93E+00 5.94E+01 3.50E+01 pCi/kg DCM Diablo Cove Marine(525676002) - FH Rockfsh 19-Oct-20 Zinc-65 8.62E+00 4.27E+01 2.76E+01 pCi/kg DCM Diablo Cove Marine - Intertidal Mussel Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Cesium-134 6.05E+00 2.12E+01 1.21E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Cesium-134 -1.39E+00 1.73E+01 1.08E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Cesium-134 4.96E+00 1.60E+01 9.54E+00 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Cesium-134 -1.05E+00 1.67E+01 1.03E+01 pCi/kg DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Cesium-137 7.88E-01 1.86E+01 1.13E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Cesium-137 5.47E+00 1.94E+01 1.16E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Cesium-137 4.97E-01 1.51E+01 8.90E+00 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Cesium-137 -2.87E+00 1.50E+01 1.05E+01 pCi/kg DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Cobalt-58 6.28E+00 1.98E+01 1.13E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Cobalt-58 -3.52E+00 1.71E+01 1.10E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Cobalt-58 -2.79E+00 1.47E+01 9.19E+00 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Cobalt-58 -9.53E-01 1.47E+01 9.10E+00 pCi/kg DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Cobalt-60 1.33E+01 2.15E+01 1.39E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Cobalt-60 -5.69E+00 1.61E+01 1.07E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Cobalt-60 2.18E+00 1.64E+01 9.67E+00 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Cobalt-60 -3.95E+00 1.41E+01 9.11E+00 pCi/kg DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Iron-59 1.19E+01 4.78E+01 2.79E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Iron-59 -2.63E+00 3.75E+01 2.23E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Iron-59 -7.94E+00 3.02E+01 1.88E+01 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Iron-59 1.85E+01 3.72E+01 2.16E+01 pCi/kg 237

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Manganese-54 -4.10E+00 1.72E+01 1.06E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Manganese-54 -6.07E+00 1.70E+01 1.15E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Manganese-54 3.96E+00 1.50E+01 8.96E+00 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Manganese-54 -2.81E+00 1.59E+01 1.01E+01 pCi/kg DCM Diablo Cove Marine(500916004) - IM 21-Jan-20 Zinc-65 6.45E+00 4.35E+01 2.56E+01 pCi/kg DCM Diablo Cove Marine(509741001) - IM 14-Apr-20 Zinc-65 1.93E+00 3.33E+01 2.18E+01 pCi/kg DCM Diablo Cove Marine(515653001) - IM 23-Jul-20 Zinc-65 -5.24E+00 3.01E+01 1.83E+01 pCi/kg DCM Diablo Cove Marine(523223007) - IM 27-Oct-20 Zinc-65 1.74E+01 3.79E+01 2.20E+01 pCi/kg DCM Diablo Cove Marine - Ocean Sediment Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Barium-140 -2.98E+01 4.76E+02 3.01E+02 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Cesium-134 -1.49E+01 8.48E+01 5.37E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Cesium-137 4.09E+01 9.50E+01 5.78E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Cobalt-58 -1.08E+01 7.26E+01 4.59E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Cobalt-60 -1.40E+01 5.51E+01 3.84E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Iron-55 3.54E+03 8.19E+03 6.16E+03 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Iron-59 -6.07E+01 1.66E+02 1.13E+02 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Lanthanum-140 -5.58E+01 1.13E+02 9.56E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Manganese-54 2.73E+01 9.10E+01 5.13E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Nickel-63 1.66E+03 1.81E+03 1.19E+03 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Niobium-95 7.60E+00 9.30E+01 5.46E+01 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Total Strontium 1.85E+02 4.88E+02 3.06E+02 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Zinc-65 3.19E+01 1.93E+02 1.74E+02 pCi/kg DCM Diablo Cove Marine(505076001) - SD 20-Feb-20 Zirconium-95 -6.38E+00 1.34E+02 8.04E+01 pCi/kg DCM Diablo Cove Marine - Seawater Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 BETA 4.28E+02 1.27E+02 1.13E+02 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 BETA 3.24E+02 1.57E+02 1.15E+02 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 BETA 2.96E+02 1.33E+02 1.01E+02 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 BETA 3.76E+02 1.37E+02 1.12E+02 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 BETA 2.81E+02 1.45E+02 1.06E+02 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 BETA 2.00E+02 8.27E+01 6.70E+01 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 BETA 4.24E+02 1.59E+02 1.26E+02 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 BETA 3.02E+02 1.29E+02 1.00E+02 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 BETA 2.84E+02 1.51E+02 1.08E+02 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 BETA 2.62E+02 1.40E+02 1.00E+02 pCi/L 238

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 BETA 3.47E+02 1.29E+02 1.04E+02 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 BETA 4.41E+02 1.12E+02 1.09E+02 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 BETA 3.98E+02 1.67E+02 1.28E+02 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 BETA 2.41E+02 1.19E+02 8.82E+01 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Barium-140 2.32E+00 1.00E+01 5.90E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Barium-140 -1.98E+00 7.43E+00 4.63E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Barium-140 -2.42E+00 6.73E+00 6.20E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Barium-140 -1.59E+00 7.37E+00 4.57E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Barium-140 4.46E+00 9.14E+00 5.54E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Barium-140 -3.10E+00 7.66E+00 4.88E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Barium-140 -4.11E-01 7.17E+00 4.25E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Barium-140 1.70E-01 7.31E+00 4.52E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Barium-140 -1.30E+00 7.07E+00 4.28E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Barium-140 1.34E+01 1.34E+01 1.85E+01 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Barium-140 2.76E+00 8.66E+00 9.04E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Barium-140 2.90E-01 8.79E+00 5.40E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Barium-140 -2.19E+00 5.61E+00 3.59E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Barium-140 5.20E+00 8.24E+00 5.16E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Cesium-134 6.82E-01 2.03E+00 1.22E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Cesium-134 -1.21E+00 1.64E+00 1.73E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Cesium-134 -5.75E-01 1.52E+00 1.55E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Cesium-134 7.23E-01 2.01E+00 1.23E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Cesium-134 -3.11E-01 1.83E+00 1.17E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Cesium-134 -6.02E-01 2.17E+00 1.38E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Cesium-134 2.07E-01 1.55E+00 9.26E-01 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Cesium-134 -9.59E-01 1.45E+00 1.60E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Cesium-134 1.35E-01 1.39E+00 8.30E-01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Cesium-134 8.76E-01 2.25E+00 1.36E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Cesium-134 1.36E+00 1.36E+00 1.07E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Cesium-134 1.36E-01 1.83E+00 1.06E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Cesium-134 2.69E-01 1.42E+00 8.42E-01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Cesium-134 4.71E-01 1.85E+00 1.18E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Cesium-137 1.77E+00 1.77E+00 1.54E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Cesium-137 -3.22E-01 1.44E+00 9.05E-01 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Cesium-137 5.87E-01 1.47E+00 8.75E-01 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Cesium-137 -9.98E-02 1.80E+00 1.10E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Cesium-137 4.70E-01 1.74E+00 1.04E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Cesium-137 -1.41E+00 1.87E+00 1.72E+00 pCi/L 239

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Cesium-137 7.05E-02 1.31E+00 7.77E-01 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Cesium-137 4.47E-02 1.50E+00 8.97E-01 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Cesium-137 6.15E-01 1.42E+00 8.47E-01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Cesium-137 -7.06E-01 2.25E+00 1.99E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Cesium-137 6.34E-02 1.53E+00 9.18E-01 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Cesium-137 -8.66E-02 1.83E+00 1.07E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Cesium-137 -3.44E-01 1.27E+00 7.97E-01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Cesium-137 3.49E-01 1.64E+00 9.83E-01 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Cobalt-58 -2.11E-01 1.83E+00 1.14E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Cobalt-58 -2.24E-03 1.47E+00 8.98E-01 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Cobalt-58 5.85E-01 1.41E+00 8.49E-01 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Cobalt-58 2.38E-02 1.59E+00 9.80E-01 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Cobalt-58 4.38E-02 1.68E+00 1.04E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Cobalt-58 6.59E-01 1.96E+00 1.18E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Cobalt-58 -2.37E-02 1.38E+00 8.33E-01 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Cobalt-58 1.87E-01 1.29E+00 7.77E-01 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Cobalt-58 -2.63E-02 1.25E+00 8.48E-01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Cobalt-58 1.90E-01 2.02E+00 1.22E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Cobalt-58 -5.42E-01 1.45E+00 9.67E-01 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Cobalt-58 9.09E-01 1.83E+00 1.06E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Cobalt-58 -2.27E-01 1.26E+00 7.85E-01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Cobalt-58 -1.59E-01 1.58E+00 9.94E-01 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Cobalt-60 -8.02E-01 1.91E+00 1.50E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Cobalt-60 7.51E-01 1.88E+00 1.09E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Cobalt-60 1.49E+00 1.62E+00 1.26E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Cobalt-60 -1.70E+00 1.77E+00 1.47E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Cobalt-60 3.98E-01 1.92E+00 1.27E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Cobalt-60 -1.40E+00 2.10E+00 1.76E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Cobalt-60 -1.61E+00 1.75E+00 1.71E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Cobalt-60 -6.77E-01 1.48E+00 1.55E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Cobalt-60 1.83E-01 1.42E+00 8.13E-01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Cobalt-60 -8.45E-01 1.78E+00 1.80E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Cobalt-60 2.00E-01 1.61E+00 9.35E-01 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Cobalt-60 4.65E-01 1.94E+00 1.14E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Cobalt-60 -5.72E-02 1.33E+00 7.82E-01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Cobalt-60 6.57E-01 1.79E+00 1.05E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Iodine-131 -3.68E-01 3.67E+00 2.40E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Iodine-131 1.41E+00 2.73E+00 1.65E+00 pCi/L 240

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Iodine-131 -5.80E-01 2.54E+00 1.51E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Iodine-131 4.94E-01 2.55E+00 1.53E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Iodine-131 4.25E-03 3.08E+00 1.78E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Iodine-131 9.54E-01 2.52E+00 1.54E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Iodine-131 7.45E-02 2.62E+00 1.50E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Iodine-131 7.84E-01 2.70E+00 1.57E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Iodine-131 -4.62E-01 2.42E+00 1.43E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Iodine-131 -5.05E-01 4.13E+00 2.42E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Iodine-131 7.11E-01 2.99E+00 1.73E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Iodine-131 6.74E-01 3.47E+00 2.10E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Iodine-131 -4.51E-01 1.94E+00 1.16E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Iodine-131 3.28E-01 3.19E+00 1.85E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Iron-55 2.33E+01 8.40E+01 6.11E+01 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Iron-55 2.48E+01 8.72E+01 6.53E+01 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Iron-55 -3.92E+01 9.83E+01 6.93E+01 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Iron-55 -2.42E+01 6.94E+01 4.98E+01 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Iron-55 1.72E+01 1.44E+02 1.02E+02 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Iron-55 2.45E+01 4.01E+01 2.82E+01 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Iron-55 7.30E+00 5.08E+01 3.29E+01 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Iron-55 4.08E+00 8.34E+01 6.33E+01 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Iron-55 5.56E+01 9.71E+01 7.60E+01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Iron-55 6.98E+01 8.70E+01 7.07E+01 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Iron-55 -1.07E+01 1.20E+02 7.55E+01 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Iron-55 -4.04E+01 1.13E+02 7.03E+01 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Iron-55 -3.38E+01 1.49E+02 9.21E+01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Iron-55 1.62E+02 1.94E+02 1.29E+02 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Iron-59 3.42E+00 3.92E+00 2.84E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Iron-59 -3.35E-01 3.18E+00 1.88E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Iron-59 1.57E+00 3.09E+00 1.91E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Iron-59 -1.82E+00 3.31E+00 2.28E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Iron-59 6.47E-01 4.15E+00 2.42E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Iron-59 3.10E-01 4.14E+00 2.41E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Iron-59 1.79E-02 2.88E+00 1.78E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Iron-59 -8.89E-01 2.89E+00 1.80E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Iron-59 8.11E-01 2.86E+00 1.73E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Iron-59 1.79E+00 4.12E+00 2.63E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Iron-59 -9.39E-01 3.10E+00 1.94E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Iron-59 1.23E+00 3.81E+00 2.23E+00 pCi/L 241

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Iron-59 1.18E-01 2.99E+00 1.84E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Iron-59 2.15E+00 3.69E+00 2.25E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Lanthanum-140 -1.12E+00 2.44E+00 1.71E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Lanthanum-140 5.49E-01 2.78E+00 1.61E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Lanthanum-140 -8.40E-01 2.05E+00 1.35E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Lanthanum-140 -7.18E-01 2.65E+00 1.74E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Lanthanum-140 4.22E-01 3.32E+00 1.99E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Lanthanum-140 -7.75E-01 2.44E+00 1.63E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Lanthanum-140 -3.02E-01 1.91E+00 1.18E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Lanthanum-140 -3.44E-01 2.35E+00 1.45E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Lanthanum-140 -2.74E-01 2.09E+00 1.46E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Lanthanum-140 -6.90E-01 2.90E+00 1.85E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Lanthanum-140 -8.61E-01 2.75E+00 1.79E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Lanthanum-140 1.71E+00 2.82E+00 6.28E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Lanthanum-140 -4.69E-02 1.91E+00 1.14E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Lanthanum-140 1.25E-01 2.93E+00 1.78E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Manganese-54 -5.66E-01 1.71E+00 1.12E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Manganese-54 -4.56E-01 1.53E+00 9.93E-01 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Manganese-54 -5.31E-01 1.22E+00 8.13E-01 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Manganese-54 -1.27E-01 1.63E+00 9.53E-01 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Manganese-54 -1.28E-01 1.64E+00 9.59E-01 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Manganese-54 -1.58E-01 1.83E+00 1.13E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Manganese-54 -9.87E-01 1.34E+00 1.11E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Manganese-54 -1.11E-01 1.38E+00 8.53E-01 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Manganese-54 9.98E-02 1.29E+00 7.71E-01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Manganese-54 -2.80E-01 1.88E+00 1.18E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Manganese-54 4.52E-01 1.68E+00 1.02E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Manganese-54 -6.32E-01 1.64E+00 1.04E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Manganese-54 -1.07E-01 1.23E+00 7.59E-01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Manganese-54 2.46E-01 1.52E+00 8.70E-01 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Nickel-63 2.84E+00 1.79E+01 1.08E+01 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Nickel-63 1.41E+01 2.59E+01 1.63E+01 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Nickel-63 -2.90E+00 2.22E+01 1.31E+01 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Nickel-63 7.93E+00 2.35E+01 1.44E+01 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Nickel-63 2.08E+00 3.29E+01 1.97E+01 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Nickel-63 -1.26E+00 3.27E+01 1.94E+01 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Nickel-63 -5.81E+00 3.32E+01 1.96E+01 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Nickel-63 3.93E+00 2.94E+01 1.77E+01 pCi/L 242

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Nickel-63 1.44E+01 4.39E+01 2.68E+01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Nickel-63 -2.19E+00 3.66E+01 2.17E+01 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Nickel-63 1.33E+01 3.76E+01 2.29E+01 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Nickel-63 -3.57E+00 3.60E+01 2.13E+01 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Nickel-63 1.58E+00 2.97E+01 1.78E+01 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Nickel-63 -2.99E+00 3.08E+01 1.82E+01 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Niobium-95 -1.24E-01 1.82E+00 1.12E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Niobium-95 5.97E-01 1.49E+00 8.94E-01 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Niobium-95 4.38E-01 1.41E+00 8.39E-01 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Niobium-95 -2.24E+00 1.68E+00 2.56E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Niobium-95 6.80E-01 1.85E+00 1.13E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Niobium-95 1.54E+00 2.06E+00 1.33E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Niobium-95 -2.57E-01 1.18E+00 7.39E-01 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Niobium-95 5.05E-01 1.52E+00 9.18E-01 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Niobium-95 -5.00E-02 1.34E+00 8.09E-01 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Niobium-95 5.28E-01 2.09E+00 1.26E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Niobium-95 -3.01E-01 1.51E+00 9.53E-01 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Niobium-95 1.07E+00 1.98E+00 1.19E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Niobium-95 4.65E-01 1.29E+00 1.66E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Niobium-95 -8.48E-01 1.55E+00 1.09E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Total Strontium -1.88E+00 2.41E+00 1.36E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Total Strontium -4.03E-02 1.77E+00 1.06E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Total Strontium -5.47E-01 2.70E+00 1.58E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Total Strontium 2.19E+00 4.47E+00 2.78E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Total Strontium 1.12E+00 3.61E+00 2.21E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Total Strontium -1.89E+00 2.87E+00 1.61E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Total Strontium -3.33E+00 6.01E+00 2.88E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Total Strontium -1.12E+00 3.74E+00 2.18E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Total Strontium -1.20E+00 2.78E+00 1.60E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Total Strontium -9.29E-01 2.82E+00 1.65E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Total Strontium 1.68E+00 1.88E+00 1.25E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Total Strontium -2.44E+00 6.98E+00 4.09E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Total Strontium 2.62E-01 2.39E+00 1.44E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Total Strontium -2.40E+00 3.34E+00 1.72E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Tritium 1.71E+01 2.59E+02 1.55E+02 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Tritium -2.15E+02 3.06E+02 1.73E+02 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Tritium 6.23E+01 2.93E+02 1.78E+02 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Tritium 1.53E+01 2.38E+02 1.43E+02 pCi/L 243

2020 DCPP REMP Analysis Results Appendix A DCM Diablo Cove Marine(510649003) - SW 11-May-20 Tritium 8.35E+01 2.71E+02 1.66E+02 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Tritium -6.49E+01 3.01E+02 1.76E+02 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Tritium 4.36E+01 2.91E+02 1.75E+02 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Tritium 4.34E+01 2.54E+02 1.54E+02 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Tritium 6.07E+01 2.62E+02 1.59E+02 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Tritium -1.89E+02 3.25E+02 1.85E+02 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Tritium -9.72E+01 2.67E+02 1.55E+02 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Tritium 1.19E+02 3.14E+02 1.96E+02 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Tritium 7.25E+01 2.55E+02 1.56E+02 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Tritium 2.52E+02 3.63E+02 2.37E+02 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Zinc-65 9.12E-01 4.11E+00 2.35E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Zinc-65 -3.40E+00 3.44E+00 3.52E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Zinc-65 1.17E-01 2.95E+00 2.02E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Zinc-65 8.89E-01 3.72E+00 2.42E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Zinc-65 -9.02E-01 4.00E+00 2.47E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Zinc-65 -1.62E-01 4.49E+00 2.66E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Zinc-65 -2.39E+00 2.77E+00 2.23E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Zinc-65 5.41E-01 3.02E+00 1.79E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Zinc-65 1.14E+00 2.90E+00 1.83E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Zinc-65 2.10E-01 3.89E+00 2.24E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Zinc-65 5.29E-01 3.33E+00 1.91E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Zinc-65 1.43E-01 3.70E+00 2.48E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Zinc-65 2.55E-01 2.90E+00 1.65E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Zinc-65 3.74E-01 3.69E+00 3.24E+00 pCi/L DCM Diablo Cove Marine(501627007) - SW 23-Jan-20 Zirconium-95 1.53E+00 3.26E+00 2.59E+00 pCi/L DCM Diablo Cove Marine(503808003) - SW 18-Feb-20 Zirconium-95 -6.70E-01 2.58E+00 1.65E+00 pCi/L DCM Diablo Cove Marine(505737003) - SW 3-Mar-20 Zirconium-95 1.66E+00 2.54E+00 1.59E+00 pCi/L DCM Diablo Cove Marine(508947002) - SW 13-Apr-20 Zirconium-95 -1.67E+00 2.59E+00 1.91E+00 pCi/L DCM Diablo Cove Marine(510649003) - SW 11-May-20 Zirconium-95 1.47E-01 3.24E+00 1.98E+00 pCi/L DCM Diablo Cove Marine(513548003) - SW 22-Jun-20 Zirconium-95 1.36E+00 3.11E+00 2.07E+00 pCi/L DCM Diablo Cove Marine(514719003) - SW 14-Jul-20 Zirconium-95 3.23E-01 2.42E+00 1.44E+00 pCi/L DCM Diablo Cove Marine(517385003) - SW 10-Aug-20 Zirconium-95 6.73E-01 2.43E+00 1.45E+00 pCi/L DCM Diablo Cove Marine(517385006) - SW 10-Aug-20 Zirconium-95 2.42E-02 2.27E+00 1.36E+00 pCi/L DCM Diablo Cove Marine(519822002) - SW 1-Sep-20 Zirconium-95 -3.95E-01 3.61E+00 2.22E+00 pCi/L DCM Diablo Cove Marine(524334003) - SW 19-Oct-20 Zirconium-95 1.68E-01 2.81E+00 1.70E+00 pCi/L DCM Diablo Cove Marine(525420003) - SW 26-Oct-20 Zirconium-95 1.30E+00 3.02E+00 2.50E+00 pCi/L DCM Diablo Cove Marine(526083003) - SW 5-Nov-20 Zirconium-95 1.92E+00 2.47E+00 1.60E+00 pCi/L DCM Diablo Cove Marine(528799001) - SW 2-Dec-20 Zirconium-95 -3.78E-01 2.63E+00 1.66E+00 pCi/L 244

2020 DCPP REMP Analysis Results Appendix A DW1 Drinking Water Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DW1 Drinking Water(500502001) - DW 14-Jan-20 BETA 4.94E-01 1.23E+00 7.61E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 BETA 4.78E-01 1.14E+00 7.05E-01 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 BETA 2.38E+00 1.48E+00 1.03E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 BETA 8.34E-03 1.73E+00 1.04E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 BETA 1.04E+00 1.35E+00 8.55E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 BETA -2.75E-01 1.68E+00 9.91E-01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 BETA 4.83E-01 1.29E+00 7.89E-01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 BETA 3.08E-01 9.89E-01 6.08E-01 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 BETA -2.38E-01 1.44E+00 8.53E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 BETA 3.25E-01 1.08E+00 6.61E-01 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 BETA -2.09E-01 2.05E+00 1.22E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 BETA 5.03E-01 9.69E-01 6.09E-01 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Barium-140 2.01E+00 6.54E+00 3.92E+00 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Barium-140 3.45E+00 6.64E+00 4.16E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Barium-140 3.24E-02 7.01E+00 4.21E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Barium-140 -5.93E-01 5.86E+00 3.49E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Barium-140 6.64E+00 6.64E+00 8.84E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Barium-140 1.83E+00 9.23E+00 5.62E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Barium-140 1.10E+00 7.41E+00 4.49E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Barium-140 2.05E+00 8.62E+00 5.09E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Barium-140 4.20E+00 7.94E+00 4.87E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Barium-140 -1.93E-01 1.06E+01 6.54E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Barium-140 2.88E+00 8.08E+00 4.80E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Barium-140 1.14E+00 8.94E+00 5.28E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Cesium-134 7.33E-02 1.43E+00 9.27E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Cesium-134 -1.20E+00 1.97E+00 2.27E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Cesium-134 -8.64E-01 1.47E+00 9.95E-01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Cesium-134 -6.87E-01 1.52E+00 1.56E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Cesium-134 -9.73E-01 1.36E+00 1.65E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Cesium-134 4.70E-01 1.83E+00 1.05E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Cesium-134 8.80E-01 1.60E+00 1.07E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Cesium-134 8.70E-02 1.73E+00 1.06E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Cesium-134 6.65E-01 1.67E+00 1.02E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Cesium-134 -7.67E-03 1.80E+00 1.05E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Cesium-134 -8.29E-02 1.86E+00 1.16E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Cesium-134 8.15E-01 1.96E+00 1.18E+00 pCi/L 245

2020 DCPP REMP Analysis Results Appendix A DW1 Drinking Water(500502001) - DW 14-Jan-20 Cesium-137 6.48E-01 1.50E+00 9.19E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Cesium-137 -7.11E-03 1.68E+00 9.80E-01 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Cesium-137 -4.82E-01 1.44E+00 9.42E-01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Cesium-137 4.66E-01 1.52E+00 8.91E-01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Cesium-137 5.60E-01 1.43E+00 8.69E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Cesium-137 -8.99E-03 1.69E+00 9.77E-01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Cesium-137 -1.06E-01 1.44E+00 8.41E-01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Cesium-137 2.96E-01 1.69E+00 1.01E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Cesium-137 9.45E-01 1.58E+00 9.88E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Cesium-137 -5.82E-01 1.61E+00 1.00E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Cesium-137 -4.28E-02 1.73E+00 1.05E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Cesium-137 7.20E-01 1.82E+00 1.09E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Cobalt-58 -9.65E-01 1.30E+00 9.28E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Cobalt-58 3.32E-02 1.49E+00 8.80E-01 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Cobalt-58 -2.69E-01 1.31E+00 7.89E-01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Cobalt-58 2.17E-01 1.42E+00 8.83E-01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Cobalt-58 -5.03E-01 1.33E+00 8.36E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Cobalt-58 1.08E-02 1.73E+00 1.01E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Cobalt-58 7.36E-02 1.46E+00 8.54E-01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Cobalt-58 -2.01E-01 1.46E+00 9.27E-01 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Cobalt-58 2.80E-01 1.33E+00 8.02E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Cobalt-58 -3.74E-01 1.65E+00 1.01E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Cobalt-58 1.41E-01 1.76E+00 1.08E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Cobalt-58 -1.12E+00 1.53E+00 1.15E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Cobalt-60 4.43E-02 1.55E+00 9.25E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Cobalt-60 2.11E-01 1.86E+00 1.06E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Cobalt-60 8.60E-01 1.58E+00 1.65E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Cobalt-60 6.22E-02 1.56E+00 1.02E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Cobalt-60 7.75E-01 1.68E+00 1.01E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Cobalt-60 1.16E-01 1.73E+00 1.02E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Cobalt-60 1.68E+00 1.68E+00 1.65E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Cobalt-60 1.01E-01 2.00E+00 1.19E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Cobalt-60 -3.49E-02 1.59E+00 9.41E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Cobalt-60 2.05E-01 1.82E+00 1.07E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Cobalt-60 -2.13E-01 1.80E+00 1.11E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Cobalt-60 -1.21E-01 1.82E+00 1.14E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Iodine-131 2.75E-01 7.70E-01 4.65E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Iodine-131 -1.39E-01 9.86E-01 5.93E-01 pCi/L 246

2020 DCPP REMP Analysis Results Appendix A DW1 Drinking Water(505351002) - DW 4-Mar-20 Iodine-131 1.77E-01 4.90E-01 2.90E-01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Iodine-131 -1.18E-01 6.70E-01 3.96E-01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Iodine-131 3.41E-01 5.98E-01 3.62E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Iodine-131 -8.61E-02 6.11E-01 3.61E-01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Iodine-131 1.06E-01 5.15E-01 3.45E-01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Iodine-131 2.19E-01 6.65E-01 4.24E-01 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Iodine-131 1.41E-01 8.12E-01 4.66E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Iodine-131 -1.47E-01 6.66E-01 3.99E-01 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Iodine-131 -2.66E-02 5.92E-01 7.12E-01 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Iodine-131 -5.64E-02 9.69E-01 5.91E-01 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Iron-55 2.26E+01 6.51E+01 4.94E+01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Iron-55 -1.64E+01 9.51E+01 6.98E+01 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Iron-55 -1.06E+01 1.10E+02 7.87E+01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Iron-55 8.47E+00 6.52E+01 4.76E+01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Iron-55 4.86E+00 6.83E+01 4.60E+01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Iron-55 -8.56E+01 1.25E+02 7.67E+01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Iron-55 7.01E+00 4.95E+01 3.21E+01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Iron-55 -4.46E+01 1.12E+02 8.03E+01 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Iron-55 3.59E+01 8.08E+01 6.40E+01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Iron-55 -3.03E+01 1.09E+02 7.19E+01 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Iron-55 -5.23E+01 1.40E+02 8.56E+01 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Iron-55 2.85E+01 1.45E+02 9.19E+01 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Iron-59 -3.17E-01 2.76E+00 1.66E+00 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Iron-59 1.44E+00 3.12E+00 2.66E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Iron-59 -5.65E-01 2.79E+00 1.72E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Iron-59 -6.38E-01 2.94E+00 1.91E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Iron-59 2.23E-01 2.79E+00 1.63E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Iron-59 -7.50E-01 3.21E+00 1.99E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Iron-59 -9.70E-01 2.60E+00 1.71E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Iron-59 -3.21E-01 3.34E+00 2.29E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Iron-59 -6.57E-03 2.88E+00 1.68E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Iron-59 -2.04E+00 3.40E+00 2.38E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Iron-59 9.16E-01 3.81E+00 2.48E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Iron-59 7.36E-01 3.67E+00 2.20E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Lanthanum-140 -1.55E+00 2.42E+00 2.16E+00 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Lanthanum-140 -7.02E-02 2.28E+00 1.35E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Lanthanum-140 1.04E+00 2.47E+00 1.46E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Lanthanum-140 -1.27E+00 1.85E+00 1.39E+00 pCi/L 247

2020 DCPP REMP Analysis Results Appendix A DW1 Drinking Water(509753002) - DW 6-May-20 Lanthanum-140 -5.40E-01 2.18E+00 1.63E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Lanthanum-140 -5.44E-01 3.09E+00 1.94E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Lanthanum-140 9.42E-01 2.50E+00 1.45E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Lanthanum-140 -7.03E-01 2.94E+00 1.91E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Lanthanum-140 -2.28E+00 2.18E+00 4.68E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Lanthanum-140 -2.29E+00 2.93E+00 2.29E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Lanthanum-140 3.34E-01 3.01E+00 1.80E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Lanthanum-140 2.46E-01 3.07E+00 1.76E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Manganese-54 -4.60E-01 1.33E+00 8.24E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Manganese-54 -4.08E-01 1.55E+00 1.10E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Manganese-54 -2.27E-01 1.37E+00 8.14E-01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Manganese-54 -2.44E-01 1.31E+00 8.20E-01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Manganese-54 -1.31E-01 1.30E+00 7.60E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Manganese-54 -2.94E-01 1.62E+00 9.73E-01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Manganese-54 -5.15E-01 1.36E+00 1.27E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Manganese-54 -9.02E-02 1.54E+00 8.94E-01 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Manganese-54 -1.30E+00 1.32E+00 1.22E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Manganese-54 -2.53E-02 1.58E+00 9.26E-01 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Manganese-54 -5.66E-01 1.64E+00 1.02E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Manganese-54 -1.80E-01 1.48E+00 9.15E-01 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Nickel-63 1.71E+01 2.94E+01 1.85E+01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Nickel-63 1.68E+01 3.74E+01 2.29E+01 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Nickel-63 1.79E+00 2.06E+01 1.23E+01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Nickel-63 -1.79E+01 3.23E+01 1.85E+01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Nickel-63 -1.03E+01 3.16E+01 1.84E+01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Nickel-63 1.19E+01 2.97E+01 1.83E+01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Nickel-63 -6.30E+00 3.69E+01 2.17E+01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Nickel-63 1.54E+01 3.92E+01 2.41E+01 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Nickel-63 1.68E+01 2.94E+01 1.83E+01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Nickel-63 9.89E+00 1.89E+01 1.18E+01 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Nickel-63 1.24E+01 4.20E+01 2.56E+01 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Nickel-63 6.73E+00 3.89E+01 2.35E+01 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Niobium-95 -1.48E-01 1.35E+00 8.49E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Niobium-95 -1.46E+00 1.60E+00 1.95E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Niobium-95 -1.50E+00 1.48E+00 3.73E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Niobium-95 -8.93E-01 1.17E+00 8.89E-01 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Niobium-95 7.11E-02 1.46E+00 8.94E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Niobium-95 -1.51E+00 1.84E+00 2.10E+00 pCi/L 248

2020 DCPP REMP Analysis Results Appendix A DW1 Drinking Water(514708001) - DW 7-Jul-20 Niobium-95 3.87E-01 1.48E+00 8.62E-01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Niobium-95 1.54E+00 1.58E+00 1.32E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Niobium-95 2.47E-01 1.64E+00 9.89E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Niobium-95 7.90E-01 1.88E+00 1.10E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Niobium-95 3.94E-01 1.84E+00 1.12E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Niobium-95 1.66E+00 1.66E+00 1.71E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Total Strontium 4.12E-01 8.14E-01 5.24E-01 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Total Strontium 4.92E-01 8.09E-01 5.43E-01 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Total Strontium -2.81E-01 1.40E+00 8.06E-01 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Total Strontium 5.46E-01 1.60E+00 1.01E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Total Strontium -2.45E-01 8.84E-01 4.78E-01 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Total Strontium 2.23E-01 7.90E-01 4.92E-01 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Total Strontium -5.59E-02 1.38E+00 8.18E-01 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Total Strontium -8.68E-02 1.73E+00 1.02E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Total Strontium 3.37E-01 5.79E-01 3.94E-01 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Total Strontium 3.27E-01 1.40E+00 8.86E-01 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Total Strontium -2.13E-01 1.03E+00 5.95E-01 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Total Strontium 7.53E-02 5.94E-01 3.64E-01 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Tritium 2.49E+01 2.76E+02 1.66E+02 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Tritium -1.37E+01 3.10E+02 1.84E+02 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Tritium 7.33E+01 2.87E+02 1.76E+02 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Tritium -3.07E+01 2.74E+02 1.62E+02 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Tritium -5.74E+01 2.64E+02 1.54E+02 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Tritium -1.48E-01 2.75E+02 1.64E+02 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Tritium -5.93E+01 3.26E+02 1.91E+02 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Tritium -5.11E+01 3.08E+02 1.81E+02 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Tritium 4.28E+01 3.18E+02 1.92E+02 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Tritium 8.29E+01 3.63E+02 2.22E+02 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Tritium 8.33E+01 2.26E+02 1.40E+02 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Tritium 3.35E+02 3.78E+02 2.55E+02 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Zinc-65 2.70E-01 2.78E+00 1.84E+00 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Zinc-65 1.66E-02 3.30E+00 2.00E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Zinc-65 -3.45E+00 2.76E+00 3.03E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Zinc-65 -4.97E-01 2.98E+00 3.30E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Zinc-65 -4.40E-01 2.54E+00 1.77E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Zinc-65 -7.64E-01 3.40E+00 2.11E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Zinc-65 -3.53E-01 2.88E+00 2.04E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Zinc-65 -3.55E-01 3.55E+00 2.44E+00 pCi/L 249

2020 DCPP REMP Analysis Results Appendix A DW1 Drinking Water(520032003) - DW 2-Sep-20 Zinc-65 2.40E+00 3.23E+00 2.62E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Zinc-65 -2.03E+00 3.18E+00 2.26E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Zinc-65 1.01E+00 3.73E+00 2.16E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Zinc-65 1.77E-01 3.12E+00 2.12E+00 pCi/L DW1 Drinking Water(500502001) - DW 14-Jan-20 Zirconium-95 3.66E-03 2.41E+00 1.49E+00 pCi/L DW1 Drinking Water(502412001) - DW 4-Feb-20 Zirconium-95 3.57E-01 2.68E+00 1.56E+00 pCi/L DW1 Drinking Water(505351002) - DW 4-Mar-20 Zirconium-95 -6.30E-02 2.48E+00 1.54E+00 pCi/L DW1 Drinking Water(508672001) - DW 7-Apr-20 Zirconium-95 2.95E-01 2.43E+00 1.44E+00 pCi/L DW1 Drinking Water(509753002) - DW 6-May-20 Zirconium-95 3.49E-01 2.28E+00 1.39E+00 pCi/L DW1 Drinking Water(512119001) - DW 2-Jun-20 Zirconium-95 1.81E+00 3.46E+00 2.07E+00 pCi/L DW1 Drinking Water(514708001) - DW 7-Jul-20 Zirconium-95 3.57E-01 2.41E+00 1.58E+00 pCi/L DW1 Drinking Water(516778001) - DW 4-Aug-20 Zirconium-95 1.37E+00 3.01E+00 1.84E+00 pCi/L DW1 Drinking Water(520032003) - DW 2-Sep-20 Zirconium-95 4.76E-01 2.54E+00 1.70E+00 pCi/L DW1 Drinking Water(522577001) - DW 6-Oct-20 Zirconium-95 -7.72E-02 3.07E+00 1.79E+00 pCi/L DW1 Drinking Water(525831001) - DW 3-Nov-20 Zirconium-95 -3.43E-01 2.92E+00 1.83E+00 pCi/L DW1 Drinking Water(528796001) - DW 2-Dec-20 Zirconium-95 -8.34E-01 2.76E+00 1.78E+00 pCi/L DY1 Drywell 115 - Groundwater Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units DY1 Drywell 115(512990001) - GW 9-Jun-20 Barium-140 -3.21E+00 8.20E+00 5.16E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Cesium-134 8.02E-02 1.93E+00 1.14E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Cesium-137 1.99E-01 1.78E+00 1.04E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Cobalt-58 7.62E-02 1.72E+00 1.02E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Cobalt-60 4.72E-01 1.86E+00 1.20E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Iodine-131 -1.52E+00 3.24E+00 2.92E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Iron-59 2.98E-01 3.63E+00 2.19E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Lanthanum-140 -1.67E+00 2.69E+00 1.95E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Manganese-54 -4.72E-02 1.67E+00 9.99E-01 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Niobium-95 6.52E-01 1.90E+00 1.12E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Tritium 2.63E+03 2.75E+02 5.67E+02 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Zinc-65 -1.51E+00 3.55E+00 2.78E+00 pCi/L DY1 Drywell 115(512990001) - GW 9-Jun-20 Zirconium-95 -4.07E-01 3.04E+00 1.84E+00 pCi/L GW1 Groundwater Monitoring Well 1 Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 BETA 2.09E+01 2.11E+01 1.36E+01 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 BETA -1.24E+01 2.22E+01 1.29E+01 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 BETA 2.46E+01 2.57E+01 1.65E+01 pCi/L 250

2020 DCPP REMP Analysis Results Appendix A GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 BETA 2.81E+01 2.30E+01 1.52E+01 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Barium-140 -8.87E-01 1.03E+01 6.21E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Barium-140 1.61E+00 1.14E+01 6.71E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Barium-140 -9.84E+00 1.56E+01 1.21E+01 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Barium-140 2.86E+00 1.11E+01 7.37E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Cesium-134 -1.30E+00 2.09E+00 1.69E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Cesium-134 8.38E-01 2.39E+00 2.68E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Cesium-134 5.56E-01 2.83E+00 1.67E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Cesium-134 1.71E+00 2.77E+00 1.79E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Cesium-137 -6.82E-01 2.25E+00 1.92E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Cesium-137 3.13E-01 2.27E+00 1.50E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Cesium-137 3.71E-01 2.35E+00 1.37E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Cesium-137 7.45E-01 2.38E+00 1.60E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Cobalt-58 -9.26E-01 2.13E+00 1.81E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Cobalt-58 6.48E-02 2.33E+00 1.59E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Cobalt-58 3.59E-01 2.30E+00 1.36E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Cobalt-58 -3.98E-02 2.17E+00 1.51E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Cobalt-60 -1.24E+00 2.13E+00 1.51E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Cobalt-60 -2.34E-01 2.42E+00 1.44E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Cobalt-60 -2.20E-01 2.37E+00 1.42E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Cobalt-60 8.67E-01 2.82E+00 1.67E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Iodine-131 -4.71E-01 3.78E+00 2.22E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Iodine-131 8.81E-02 4.31E+00 2.49E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Iodine-131 -3.52E+00 7.18E+00 5.05E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Iodine-131 1.47E+00 3.76E+00 2.23E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Iron-55 6.09E+01 8.07E+01 6.22E+01 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Iron-55 4.31E+01 6.31E+01 4.74E+01 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Iron-55 8.26E+00 4.71E+01 3.03E+01 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Iron-55 2.27E+00 1.44E+02 9.27E+01 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Iron-59 -1.09E+00 4.03E+00 2.51E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Iron-59 -4.09E-01 4.79E+00 2.81E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Iron-59 -1.98E-01 5.42E+00 3.15E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Iron-59 1.63E+00 5.00E+00 2.94E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Lanthanum-140 -6.15E-01 4.02E+00 2.91E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Lanthanum-140 -1.47E+00 3.86E+00 2.52E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Lanthanum-140 -1.45E+00 5.98E+00 3.83E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Lanthanum-140 -2.73E-01 3.83E+00 2.36E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Manganese-54 -1.17E+00 1.99E+00 1.33E+00 pCi/L 251

2020 DCPP REMP Analysis Results Appendix A GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Manganese-54 5.92E-01 2.28E+00 1.53E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Manganese-54 4.96E-01 2.17E+00 1.28E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Manganese-54 -1.37E+00 2.35E+00 1.86E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Nickel-63 6.95E+00 2.66E+01 1.62E+01 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Nickel-63 -2.13E+01 3.36E+01 1.91E+01 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Nickel-63 1.07E+01 2.83E+01 1.74E+01 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Nickel-63 1.29E+01 3.17E+01 1.96E+01 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Niobium-95 8.27E-01 2.42E+00 1.69E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Niobium-95 6.38E-01 2.57E+00 2.31E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Niobium-95 1.64E+00 2.90E+00 1.92E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Niobium-95 2.69E+00 2.71E+00 1.96E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Total Strontium -4.03E-01 7.41E-01 4.07E-01 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Total Strontium 7.54E-01 1.09E+00 7.60E-01 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Total Strontium -4.32E-01 7.15E-01 3.65E-01 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Total Strontium -4.27E-02 1.33E+00 7.89E-01 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Tritium 9.13E+01 2.53E+02 1.56E+02 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Tritium 1.60E+02 2.75E+02 1.76E+02 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Tritium 1.57E+02 3.11E+02 1.95E+02 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Tritium 3.74E+00 2.81E+02 1.68E+02 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Zinc-65 -5.09E-01 4.31E+00 2.96E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Zinc-65 3.71E+00 3.71E+00 3.83E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Zinc-65 -1.96E+00 3.72E+00 2.93E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Zinc-65 -1.65E+00 4.99E+00 4.96E+00 pCi/L GW1 Groundwater Monitoring Well 1(501846002) - GW 28-Jan-20 Zirconium-95 3.27E-01 3.61E+00 2.20E+00 pCi/L GW1 Groundwater Monitoring Well 1(510536001) - GW 5-May-20 Zirconium-95 -2.10E+00 3.78E+00 2.93E+00 pCi/L GW1 Groundwater Monitoring Well 1(515652002) - GW 22-Jul-20 Zirconium-95 4.44E-01 4.96E+00 2.94E+00 pCi/L GW1 Groundwater Monitoring Well 1(522579004) - GW 15-Oct-20 Zirconium-95 8.72E-01 3.99E+00 2.71E+00 pCi/L GW2 Groundwater Monitoring Well 2 Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 BETA 9.83E+00 7.30E+00 4.91E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 BETA 2.30E+01 6.63E+00 6.00E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 BETA 1.75E+01 9.44E+00 6.79E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 BETA 1.83E+01 6.65E+00 5.45E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Barium-140 4.71E+00 9.41E+00 5.70E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Barium-140 1.95E+00 7.82E+00 4.61E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Barium-140 3.73E+00 1.03E+01 8.51E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Barium-140 -1.51E+00 6.73E+00 4.12E+00 pCi/L 252

2020 DCPP REMP Analysis Results Appendix A GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Cesium-134 2.30E-01 1.94E+00 1.17E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Cesium-134 2.64E-01 1.67E+00 1.00E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Cesium-134 4.69E-01 1.95E+00 1.12E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Cesium-134 5.98E-01 1.72E+00 1.56E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Cesium-137 -6.42E-01 1.79E+00 1.16E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Cesium-137 2.87E-01 1.52E+00 1.10E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Cesium-137 -4.40E-01 1.76E+00 1.21E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Cesium-137 6.81E-01 1.57E+00 1.04E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Cobalt-58 -1.18E+00 1.64E+00 1.24E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Cobalt-58 1.08E-01 1.55E+00 9.36E-01 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Cobalt-58 5.91E-01 1.81E+00 1.17E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Cobalt-58 -9.39E-01 1.30E+00 1.08E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Cobalt-60 -1.14E-01 2.07E+00 1.23E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Cobalt-60 4.72E-01 1.68E+00 9.66E-01 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Cobalt-60 9.01E-01 2.02E+00 1.20E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Cobalt-60 -7.72E-01 1.49E+00 1.01E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Iodine-131 -1.91E+00 3.47E+00 3.25E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Iodine-131 -4.92E-01 2.79E+00 1.85E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Iodine-131 2.30E-01 3.76E+00 2.28E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Iodine-131 -1.35E+00 2.35E+00 2.01E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Iron-55 2.89E+01 7.29E+01 5.46E+01 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Iron-55 3.51E+01 7.12E+01 5.20E+01 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Iron-55 1.99E+01 3.82E+01 2.61E+01 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Iron-55 -9.21E+00 1.21E+02 7.91E+01 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Iron-59 -1.40E+00 3.56E+00 2.29E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Iron-59 -6.87E-01 3.25E+00 1.96E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Iron-59 1.00E-01 3.52E+00 2.07E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Iron-59 8.82E-02 3.03E+00 1.76E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Lanthanum-140 -7.22E-01 2.91E+00 1.85E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Lanthanum-140 2.20E+00 2.87E+00 2.26E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Lanthanum-140 1.53E+00 3.55E+00 2.34E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Lanthanum-140 -3.21E-01 2.34E+00 1.44E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Manganese-54 4.37E-01 1.78E+00 1.19E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Manganese-54 8.95E-01 1.81E+00 1.11E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Manganese-54 2.95E-01 1.65E+00 9.54E-01 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Manganese-54 5.70E-01 1.44E+00 9.65E-01 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Nickel-63 1.32E+01 2.68E+01 1.67E+01 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Nickel-63 -1.51E+01 3.46E+01 1.99E+01 pCi/L 253

2020 DCPP REMP Analysis Results Appendix A GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Nickel-63 9.12E+00 2.77E+01 1.70E+01 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Nickel-63 1.87E+01 3.28E+01 2.06E+01 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Niobium-95 4.32E-01 1.75E+00 1.16E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Niobium-95 1.55E+00 1.79E+00 1.48E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Niobium-95 2.06E-01 2.05E+00 1.71E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Niobium-95 -1.01E+00 1.68E+00 1.66E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Total Strontium 3.42E-01 8.99E-01 5.65E-01 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Total Strontium -1.22E-01 1.11E+00 6.44E-01 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Total Strontium -3.04E-01 1.53E+00 8.90E-01 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Total Strontium -6.78E-01 1.72E+00 9.74E-01 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Tritium -4.75E+01 2.61E+02 1.53E+02 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Tritium 9.11E+01 3.06E+02 1.88E+02 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Tritium -4.41E+01 3.07E+02 1.81E+02 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Tritium -1.95E+02 2.80E+02 1.57E+02 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Zinc-65 -7.19E-01 3.80E+00 3.42E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Zinc-65 6.21E-01 3.39E+00 2.17E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Zinc-65 -1.87E+00 3.56E+00 3.27E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Zinc-65 1.96E-01 3.24E+00 2.12E+00 pCi/L GW2 Groundwater Monitoring Well 2(501846001) - GW 28-Jan-20 Zirconium-95 1.79E+00 3.39E+00 2.08E+00 pCi/L GW2 Groundwater Monitoring Well 2(510536002) - GW 5-May-20 Zirconium-95 1.56E+00 2.64E+00 1.76E+00 pCi/L GW2 Groundwater Monitoring Well 2(515652003) - GW 22-Jul-20 Zirconium-95 -1.52E+00 2.94E+00 1.94E+00 pCi/L GW2 Groundwater Monitoring Well 2(522579005) - GW 15-Oct-20 Zirconium-95 -8.31E-01 2.35E+00 1.54E+00 pCi/L MDO Montana de Oro - Beach Sand Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units MDO Montana de Oro(506490003) - SD 18-Mar-20 Barium-140 -1.04E+02 3.20E+02 2.37E+02 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Barium-140 2.04E+02 3.73E+02 2.28E+02 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Cesium-134 9.38E+00 7.70E+01 4.46E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Cesium-134 3.33E+01 9.03E+01 5.20E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Cesium-137 2.61E+01 7.44E+01 4.11E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Cesium-137 1.96E+01 7.90E+01 4.50E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Cobalt-58 -1.03E+01 6.22E+01 4.03E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Cobalt-58 5.18E+00 6.20E+01 4.06E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Cobalt-60 -2.39E+01 4.88E+01 3.92E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Cobalt-60 1.79E+01 8.34E+01 4.84E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Iron-55 5.25E+03 1.51E+04 1.13E+04 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Iron-55 1.56E+04 1.60E+04 1.28E+04 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Iron-59 5.40E+01 1.44E+02 7.55E+01 pCi/kg 254

2020 DCPP REMP Analysis Results Appendix A MDO Montana de Oro(517337004) - SD 6-Aug-20 Iron-59 -7.83E+01 1.40E+02 1.03E+02 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Lanthanum-140 1.42E+01 1.26E+02 7.00E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Lanthanum-140 -1.91E+01 1.39E+02 9.85E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Manganese-54 7.15E+00 6.74E+01 4.11E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Manganese-54 -1.06E+01 7.18E+01 4.39E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Nickel-63 4.49E+02 2.29E+03 1.38E+03 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Nickel-63 -1.84E+03 2.67E+03 1.54E+03 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Niobium-95 1.86E+00 6.71E+01 3.99E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Niobium-95 -1.56E+01 7.98E+01 5.36E+01 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Total Strontium -1.50E+02 2.97E+02 1.43E+02 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Total Strontium 3.08E+02 8.44E+02 5.52E+02 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Zinc-65 -7.85E+01 1.37E+02 1.08E+02 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Zinc-65 2.92E+01 1.88E+02 1.25E+02 pCi/kg MDO Montana de Oro(506490003) - SD 18-Mar-20 Zirconium-95 -4.73E+01 8.22E+01 7.60E+01 pCi/kg MDO Montana de Oro(517337004) - SD 6-Aug-20 Zirconium-95 3.68E+01 1.31E+02 7.46E+01 pCi/kg MT1 Meteorological Tower - Air Cartridge Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units MT1 Meteorological Tower(500231020) - AC 4-Jan-20 Iodine-131 -2.71E-04 7.24E-03 4.28E-03 pCi/m3 MT1 Meteorological Tower(500490001) - AC 11-Jan-20 Iodine-131 7.50E-04 1.00E-02 5.81E-03 pCi/m3 MT1 Meteorological Tower(501031016) - AC 18-Jan-20 Iodine-131 -1.48E-03 8.09E-03 5.07E-03 pCi/m3 MT1 Meteorological Tower(502000011) - AC 25-Jan-20 Iodine-131 2.52E-03 1.05E-02 6.15E-03 pCi/m3 MT1 Meteorological Tower(502411016) - AC 1-Feb-20 Iodine-131 -2.23E-04 7.64E-03 4.53E-03 pCi/m3 MT1 Meteorological Tower(503155020) - AC 8-Feb-20 Iodine-131 -3.31E-03 4.91E-03 3.95E-03 pCi/m3 MT1 Meteorological Tower(503851016) - AC 15-Feb-20 Iodine-131 1.86E-03 8.50E-03 4.68E-03 pCi/m3 MT1 Meteorological Tower(504528016) - AC 22-Feb-20 Iodine-131 2.12E-03 8.28E-03 4.64E-03 pCi/m3 MT1 Meteorological Tower(505332001) - AC 29-Feb-20 Iodine-131 -1.58E-04 8.37E-03 5.08E-03 pCi/m3 MT1 Meteorological Tower(505759018) - AC 7-Mar-20 Iodine-131 2.33E-03 7.97E-03 4.33E-03 pCi/m3 MT1 Meteorological Tower(506435008) - AC 14-Mar-20 Iodine-131 2.36E-03 9.68E-03 5.48E-03 pCi/m3 MT1 Meteorological Tower(507015016) - AC 21-Mar-20 Iodine-131 2.91E-03 1.19E-02 6.72E-03 pCi/m3 MT1 Meteorological Tower(507592001) - AC 27-Mar-20 Iodine-131 7.20E-04 7.60E-03 4.35E-03 pCi/m3 MT1 Meteorological Tower(508867016) - AC 4-Apr-20 Iodine-131 1.73E-03 6.47E-03 3.80E-03 pCi/m3 MT1 Meteorological Tower(508984010) - AC 11-Apr-20 Iodine-131 -2.64E-03 8.90E-03 5.77E-03 pCi/m3 MT1 Meteorological Tower(509370010) - AC 18-Apr-20 Iodine-131 1.12E-03 9.41E-03 5.30E-03 pCi/m3 MT1 Meteorological Tower(509745016) - AC 25-Apr-20 Iodine-131 -1.99E-03 8.80E-03 5.47E-03 pCi/m3 MT1 Meteorological Tower(510179016) - AC 2-May-20 Iodine-131 3.00E-04 7.94E-03 4.53E-03 pCi/m3 MT1 Meteorological Tower(510640016) - AC 9-May-20 Iodine-131 1.41E-03 7.82E-03 4.32E-03 pCi/m3 MT1 Meteorological Tower(510747008) - AC 16-May-20 Iodine-131 3.01E-03 7.88E-03 4.39E-03 pCi/m3 255

2020 DCPP REMP Analysis Results Appendix A MT1 Meteorological Tower(511437016) - AC 23-May-20 Iodine-131 5.73E-03 1.31E-02 8.14E-03 pCi/m3 MT1 Meteorological Tower(512099016) - AC 30-May-20 Iodine-131 4.69E-03 1.18E-02 6.67E-03 pCi/m3 MT1 Meteorological Tower(512380016) - AC 6-Jun-20 Iodine-131 4.33E-04 7.25E-03 4.13E-03 pCi/m3 MT1 Meteorological Tower(513083013) - AC 13-Jun-20 Iodine-131 2.79E-03 9.11E-03 5.02E-03 pCi/m3 MT1 Meteorological Tower(513584016) - AC 20-Jun-20 Iodine-131 -3.01E-03 1.44E-02 8.74E-03 pCi/m3 MT1 Meteorological Tower(514894017) - AC 27-Jun-20 Iodine-131 -6.65E-04 9.62E-03 5.69E-03 pCi/m3 MT1 Meteorological Tower(514398008) - AC 4-Jul-20 Iodine-131 -1.12E-03 9.01E-03 5.42E-03 pCi/m3 MT1 Meteorological Tower(514716024) - AC 11-Jul-20 Iodine-131 1.30E-03 8.64E-03 4.78E-03 pCi/m3 MT1 Meteorological Tower(515649010) - AC 18-Jul-20 Iodine-131 -2.00E-03 7.42E-03 4.86E-03 pCi/m3 MT1 Meteorological Tower(517082016) - AC 25-Jul-20 Iodine-131 -1.06E-03 7.25E-03 4.37E-03 pCi/m3 MT1 Meteorological Tower(516773016) - AC 1-Aug-20 Iodine-131 5.96E-03 8.56E-03 8.31E-03 pCi/m3 MT1 Meteorological Tower(517339041) - AC 8-Aug-20 Iodine-131 -1.32E-03 7.43E-03 4.59E-03 pCi/m3 MT1 Meteorological Tower(517997022) - AC 15-Aug-20 Iodine-131 -2.16E-03 9.37E-03 5.96E-03 pCi/m3 MT1 Meteorological Tower(518816030) - AC 22-Aug-20 Iodine-131 9.22E-05 9.13E-03 5.37E-03 pCi/m3 MT1 Meteorological Tower(518822028) - AC 29-Aug-20 Iodine-131 -1.91E-03 8.45E-03 5.40E-03 pCi/m3 MT1 Meteorological Tower(520288018) - AC 5-Sep-20 Iodine-131 2.93E-06 9.50E-03 5.75E-03 pCi/m3 MT1 Meteorological Tower(520368016) - AC 12-Sep-20 Iodine-131 3.06E-03 1.21E-02 6.81E-03 pCi/m3 MT1 Meteorological Tower(521272016) - AC 19-Sep-20 Iodine-131 3.62E-03 1.46E-02 8.15E-03 pCi/m3 MT1 Meteorological Tower(521863016) - AC 26-Sep-20 Iodine-131 5.92E-03 1.38E-02 7.68E-03 pCi/m3 MT1 Meteorological Tower(522576010) - AC 3-Oct-20 Iodine-131 -2.20E-03 1.43E-02 8.71E-03 pCi/m3 MT1 Meteorological Tower(524007018) - AC 10-Oct-20 Iodine-131 1.46E-03 9.69E-03 5.38E-03 pCi/m3 MT1 Meteorological Tower(524009001) - AC 17-Oct-20 Iodine-131 -4.81E-03 7.91E-03 5.79E-03 pCi/m3 MT1 Meteorological Tower(524695016) - AC 24-Oct-20 Iodine-131 1.35E-03 1.58E-02 8.83E-03 pCi/m3 MT1 Meteorological Tower(525830008) - AC 31-Oct-20 Iodine-131 6.93E-03 6.93E-03 6.80E-03 pCi/m3 MT1 Meteorological Tower(526380001) - AC 7-Nov-20 Iodine-131 1.33E-03 9.14E-03 5.42E-03 pCi/m3 MT1 Meteorological Tower(527613008) - AC 14-Nov-20 Iodine-131 1.10E-03 7.94E-03 4.83E-03 pCi/m3 MT1 Meteorological Tower(527712008) - AC 21-Nov-20 Iodine-131 -3.24E-03 6.90E-03 4.90E-03 pCi/m3 MT1 Meteorological Tower(528790001) - AC 28-Nov-20 Iodine-131 -1.44E-03 6.63E-03 4.54E-03 pCi/m3 MT1 Meteorological Tower(528845010) - AC 5-Dec-20 Iodine-131 -4.57E-03 1.08E-02 7.37E-03 pCi/m3 MT1 Meteorological Tower(529341008) - AC 12-Dec-20 Iodine-131 -1.05E-03 7.60E-03 4.62E-03 pCi/m3 MT1 Meteorological Tower(530196010) - AC 19-Dec-20 Iodine-131 9.11E-04 9.30E-03 5.36E-03 pCi/m3 MT1 Meteorological Tower(530951008) - AC 25-Dec-20 Iodine-131 1.82E-03 8.79E-03 4.79E-03 pCi/m3 MT1 Meteorological Tower - Air Particulate Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units MT1 Meteorological Tower(500231021) - AP 4-Jan-20 BETA 1.77E-02 1.94E-03 9.89E-03 pCi/m3 MT1 Meteorological Tower(500490002) - AP 11-Jan-20 BETA 8.11E-03 2.59E-03 1.16E-02 pCi/m3 MT1 Meteorological Tower(501031017) - AP 18-Jan-20 BETA 1.36E-02 2.07E-03 1.04E-02 pCi/m3 256

2020 DCPP REMP Analysis Results Appendix A MT1 Meteorological Tower(502000012) - AP 25-Jan-20 BETA 1.11E-02 2.43E-03 1.46E-02 pCi/m3 MT1 Meteorological Tower(502411017) - AP 1-Feb-20 BETA 2.21E-02 2.59E-03 1.22E-02 pCi/m3 MT1 Meteorological Tower(503155021) - AP 8-Feb-20 BETA 2.29E-02 2.62E-03 1.04E-02 pCi/m3 MT1 Meteorological Tower(503851017) - AP 15-Feb-20 BETA 3.56E-02 2.62E-03 1.14E-02 pCi/m3 MT1 Meteorological Tower(504528017) - AP 22-Feb-20 BETA 2.90E-02 2.22E-03 1.13E-02 pCi/m3 MT1 Meteorological Tower(505332002) - AP 29-Feb-20 BETA 1.76E-02 2.62E-03 1.46E-02 pCi/m3 MT1 Meteorological Tower(505759019) - AP 7-Mar-20 BETA 1.45E-02 2.60E-03 1.21E-02 pCi/m3 MT1 Meteorological Tower(506435009) - AP 14-Mar-20 BETA 1.90E-02 2.65E-03 9.90E-03 pCi/m3 MT1 Meteorological Tower(507015017) - AP 21-Mar-20 BETA 1.30E-02 2.36E-03 1.11E-02 pCi/m3 MT1 Meteorological Tower(507592002) - AP 27-Mar-20 BETA 2.21E-02 2.50E-03 1.07E-02 pCi/m3 MT1 Meteorological Tower(508867017) - AP 4-Apr-20 BETA 7.40E-03 2.11E-03 8.88E-03 pCi/m3 MT1 Meteorological Tower(508984011) - AP 11-Apr-20 BETA 1.20E-02 2.94E-03 1.55E-02 pCi/m3 MT1 Meteorological Tower(509370011) - AP 18-Apr-20 BETA 1.79E-02 2.04E-03 1.03E-02 pCi/m3 MT1 Meteorological Tower(509745017) - AP 25-Apr-20 BETA 4.56E-03 2.30E-03 1.34E-02 pCi/m3 MT1 Meteorological Tower(510179017) - AP 2-May-20 BETA 1.18E-02 2.20E-03 1.22E-02 pCi/m3 MT1 Meteorological Tower(510640017) - AP 9-May-20 BETA 1.41E-02 2.20E-03 1.17E-02 pCi/m3 MT1 Meteorological Tower(510747009) - AP 16-May-20 BETA 7.33E-03 2.45E-03 1.09E-02 pCi/m3 MT1 Meteorological Tower(511437017) - AP 23-May-20 BETA 1.07E-02 2.59E-03 1.14E-02 pCi/m3 MT1 Meteorological Tower(512099017) - AP 30-May-20 BETA 6.22E-03 1.93E-03 1.04E-02 pCi/m3 MT1 Meteorological Tower(512380017) - AP 6-Jun-20 BETA 8.78E-03 2.23E-03 1.08E-02 pCi/m3 MT1 Meteorological Tower(513083014) - AP 13-Jun-20 BETA 7.71E-03 2.23E-03 1.09E-02 pCi/m3 MT1 Meteorological Tower(513584017) - AP 20-Jun-20 BETA 2.49E-03 2.13E-03 1.10E-02 pCi/m3 MT1 Meteorological Tower(514894007) - AP 27-Jun-20 BETA 3.87E-03 2.93E-03 1.25E-02 pCi/m3 MT1 Meteorological Tower(514398009) - AP 4-Jul-20 BETA 7.47E-03 1.89E-03 8.70E-03 pCi/m3 MT1 Meteorological Tower(514716025) - AP 11-Jul-20 BETA 9.95E-03 2.26E-03 1.00E-02 pCi/m3 MT1 Meteorological Tower(515649011) - AP 18-Jul-20 BETA 8.61E-03 2.34E-03 1.28E-02 pCi/m3 MT1 Meteorological Tower(517082017) - AP 25-Jul-20 BETA 8.73E-03 1.88E-03 9.26E-03 pCi/m3 MT1 Meteorological Tower(516773017) - AP 1-Aug-20 BETA 6.17E-03 2.22E-03 1.02E-02 pCi/m3 MT1 Meteorological Tower(517339042) - AP 8-Aug-20 BETA 9.53E-03 2.23E-03 1.15E-02 pCi/m3 MT1 Meteorological Tower(517997023) - AP 15-Aug-20 BETA 9.20E-03 2.65E-03 1.21E-02 pCi/m3 MT1 Meteorological Tower(518816031) - AP 22-Aug-20 BETA 5.33E-03 2.75E-03 1.32E-02 pCi/m3 MT1 Meteorological Tower(518822029) - AP 29-Aug-20 BETA 1.35E-02 2.07E-03 9.92E-03 pCi/m3 MT1 Meteorological Tower(520288019) - AP 5-Sep-20 BETA 2.31E-02 2.24E-03 1.05E-02 pCi/m3 MT1 Meteorological Tower(520368017) - AP 12-Sep-20 BETA 2.65E-02 3.34E-03 1.54E-02 pCi/m3 MT1 Meteorological Tower(521272017) - AP 19-Sep-20 BETA 5.90E-03 2.74E-03 1.56E-02 pCi/m3 MT1 Meteorological Tower(521863017) - AP 26-Sep-20 BETA 7.84E-03 3.56E-03 1.73E-02 pCi/m3 MT1 Meteorological Tower(522576011) - AP 3-Oct-20 BETA 1.82E-02 3.61E-03 1.78E-02 pCi/m3 MT1 Meteorological Tower(524007019) - AP 10-Oct-20 BETA 2.01E-02 2.30E-03 1.11E-02 pCi/m3 257

2020 DCPP REMP Analysis Results Appendix A MT1 Meteorological Tower(524009002) - AP 17-Oct-20 BETA 2.35E-02 2.26E-03 1.02E-02 pCi/m3 MT1 Meteorological Tower(524695017) - AP 24-Oct-20 BETA 3.52E-02 2.14E-03 1.22E-02 pCi/m3 MT1 Meteorological Tower(525830009) - AP 31-Oct-20 BETA 6.11E-02 2.08E-03 1.23E-02 pCi/m3 MT1 Meteorological Tower(526380002) - AP 7-Nov-20 BETA 2.32E-02 2.53E-03 1.18E-02 pCi/m3 MT1 Meteorological Tower(527613009) - AP 14-Nov-20 BETA 2.11E-02 2.12E-03 1.04E-02 pCi/m3 MT1 Meteorological Tower(527712009) - AP 21-Nov-20 BETA 2.16E-02 2.50E-03 1.29E-02 pCi/m3 MT1 Meteorological Tower(528790002) - AP 28-Nov-20 BETA 3.17E-02 2.06E-03 9.82E-03 pCi/m3 MT1 Meteorological Tower(528845011) - AP 5-Dec-20 BETA 6.17E-02 2.11E-03 1.16E-02 pCi/m3 MT1 Meteorological Tower(529341009) - AP 12-Dec-20 BETA 2.13E-02 2.10E-03 1.10E-02 pCi/m3 MT1 Meteorological Tower(530196011) - AP 19-Dec-20 BETA 2.39E-02 2.42E-03 1.38E-02 pCi/m3 MT1 Meteorological Tower(530951009) - AP 25-Dec-20 BETA 2.64E-02 2.28E-03 1.04E-02 pCi/m3 MT1 Meteorological Tower(509974001) - AP 14-Feb-20 Cesium-134 -1.04E-04 4.27E-04 2.87E-04 pCi/m3 MT1 Meteorological Tower(516372007) - AP 15-May-20 Cesium-134 9.88E-05 5.70E-04 3.67E-04 pCi/m3 MT1 Meteorological Tower(525316007) - AP 15-Aug-20 Cesium-134 -7.97E-06 3.94E-04 2.40E-04 pCi/m3 MT1 Meteorological Tower(532027007) - AP 14-Nov-20 Cesium-134 1.75E-04 6.75E-04 3.83E-04 pCi/m3 MT1 Meteorological Tower(509974001) - AP 14-Feb-20 Cesium-137 -6.06E-05 5.25E-04 3.18E-04 pCi/m3 MT1 Meteorological Tower(516372007) - AP 15-May-20 Cesium-137 6.69E-05 4.47E-04 2.54E-04 pCi/m3 MT1 Meteorological Tower(525316007) - AP 15-Aug-20 Cesium-137 1.84E-04 4.09E-04 2.39E-04 pCi/m3 MT1 Meteorological Tower(532027007) - AP 14-Nov-20 Cesium-137 -1.85E-05 5.71E-04 3.51E-04 pCi/m3 OEL Offsite Emergency Lab - Drinking Water Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 BETA 9.01E-01 1.49E+00 9.33E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 BETA 8.99E-01 1.08E+00 6.99E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 BETA 2.56E+00 1.99E+00 1.34E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 BETA 7.13E-01 1.50E+00 9.29E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 BETA 2.51E-01 2.09E+00 1.26E+00 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 BETA 8.57E-01 1.70E+00 1.05E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 BETA 5.77E-01 1.77E+00 1.08E+00 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 BETA 1.23E+00 1.37E+00 8.79E-01 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 BETA 2.05E+00 1.47E+00 9.96E-01 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 BETA 1.98E+00 1.06E+00 7.90E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 BETA 8.72E-01 8.60E-01 5.79E-01 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 BETA 4.96E-01 1.65E+00 1.00E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Barium-140 3.22E+00 8.28E+00 4.98E+00 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Barium-140 2.65E-01 4.82E+00 2.82E+00 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Barium-140 -2.60E+00 6.40E+00 4.19E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Barium-140 1.44E+00 5.95E+00 3.56E+00 pCi/L 258

2020 DCPP REMP Analysis Results Appendix A OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Barium-140 -2.13E+00 6.77E+00 4.38E+00 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Barium-140 -2.14E+00 1.29E+01 7.78E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Barium-140 -3.76E-01 6.26E+00 3.74E+00 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Barium-140 -7.78E-01 1.01E+01 5.99E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Barium-140 -2.91E+00 8.62E+00 5.39E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Barium-140 2.02E+00 8.20E+00 4.81E+00 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Barium-140 -1.58E+00 7.91E+00 4.78E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Barium-140 3.09E+00 8.63E+00 5.12E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Cesium-134 1.25E-01 1.55E+00 8.84E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Cesium-134 -5.12E-01 1.25E+00 8.35E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Cesium-134 4.66E-01 1.53E+00 8.80E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Cesium-134 -6.84E-01 1.50E+00 1.36E+00 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Cesium-134 6.62E-01 1.60E+00 9.48E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Cesium-134 1.93E+00 2.29E+00 3.43E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Cesium-134 2.71E-01 1.40E+00 8.39E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Cesium-134 4.48E-01 2.32E+00 1.36E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Cesium-134 -5.51E-02 1.95E+00 1.18E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Cesium-134 -3.17E-01 1.33E+00 8.49E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Cesium-134 4.59E-01 1.83E+00 1.08E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Cesium-134 1.54E-01 1.66E+00 1.01E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Cesium-137 1.16E+00 1.57E+00 1.02E+00 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Cesium-137 -3.87E-02 1.26E+00 7.54E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Cesium-137 -1.08E+00 1.38E+00 1.38E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Cesium-137 7.33E-01 1.51E+00 9.31E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Cesium-137 2.83E-01 1.46E+00 8.36E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Cesium-137 -3.71E-01 2.16E+00 1.33E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Cesium-137 -3.85E-02 1.28E+00 7.73E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Cesium-137 -7.17E-01 2.29E+00 1.46E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Cesium-137 1.54E+00 1.68E+00 1.13E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Cesium-137 4.93E-01 1.43E+00 8.51E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Cesium-137 -5.14E-01 1.80E+00 1.13E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Cesium-137 1.50E+00 1.50E+00 1.86E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Cobalt-58 -8.74E-02 1.44E+00 8.36E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Cobalt-58 1.06E+00 1.06E+00 1.22E+00 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Cobalt-58 -1.18E-01 1.27E+00 7.42E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Cobalt-58 -2.96E-01 1.24E+00 7.50E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Cobalt-58 -7.86E-02 1.39E+00 8.19E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Cobalt-58 -1.07E+00 2.25E+00 1.55E+00 pCi/L 259

2020 DCPP REMP Analysis Results Appendix A OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Cobalt-58 -2.45E-01 1.29E+00 8.13E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Cobalt-58 -2.22E+00 1.85E+00 1.71E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Cobalt-58 -2.77E-01 1.67E+00 1.04E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Cobalt-58 1.98E-01 1.42E+00 8.54E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Cobalt-58 -1.15E-01 1.76E+00 1.07E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Cobalt-58 -2.11E-01 1.67E+00 1.06E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Cobalt-60 -3.30E-02 1.65E+00 9.92E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Cobalt-60 9.27E-01 1.48E+00 9.54E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Cobalt-60 5.07E-01 1.42E+00 8.35E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Cobalt-60 5.31E-01 1.55E+00 9.13E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Cobalt-60 -1.21E-02 1.24E+00 7.22E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Cobalt-60 -1.04E-01 1.83E+00 1.09E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Cobalt-60 -7.39E-02 1.37E+00 8.14E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Cobalt-60 2.39E+00 2.85E+00 2.35E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Cobalt-60 4.93E-01 2.16E+00 1.26E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Cobalt-60 -1.68E-02 1.40E+00 8.29E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Cobalt-60 -1.26E+00 1.58E+00 1.24E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Cobalt-60 -1.24E-01 1.62E+00 9.86E-01 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Iodine-131 6.02E-02 8.14E-01 4.77E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Iodine-131 -7.59E-02 8.71E-01 5.24E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Iodine-131 2.03E-01 4.92E-01 2.89E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Iodine-131 2.65E-01 9.76E-01 5.69E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Iodine-131 2.74E-01 5.28E-01 3.21E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Iodine-131 1.92E-01 5.32E-01 3.17E-01 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Iodine-131 -1.45E-01 7.38E-01 4.36E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Iodine-131 2.94E-01 5.39E-01 3.25E-01 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Iodine-131 -2.02E-01 9.05E-01 5.64E-01 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Iodine-131 -1.02E-01 5.64E-01 3.34E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Iodine-131 -3.51E-02 6.59E-01 4.48E-01 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Iodine-131 1.35E-01 9.21E-01 5.52E-01 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Iron-55 1.66E+01 6.00E+01 4.49E+01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Iron-55 -5.67E+00 9.22E+01 6.80E+01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Iron-55 1.50E+01 1.14E+02 8.32E+01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Iron-55 1.71E+01 7.71E+01 5.59E+01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Iron-55 1.33E+01 7.25E+01 4.92E+01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Iron-55 -4.38E+01 1.17E+02 7.40E+01 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Iron-55 -6.89E-01 4.17E+01 2.68E+01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Iron-55 3.79E+01 7.68E+01 6.03E+01 pCi/L 260

2020 DCPP REMP Analysis Results Appendix A OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Iron-55 1.03E+01 8.16E+01 6.34E+01 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Iron-55 2.51E+01 1.06E+02 7.25E+01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Iron-55 -2.88E+01 1.49E+02 9.26E+01 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Iron-55 3.35E+01 1.46E+02 9.29E+01 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Iron-59 7.18E-02 3.04E+00 1.85E+00 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Iron-59 -6.67E-01 2.26E+00 1.50E+00 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Iron-59 9.05E-04 2.34E+00 1.38E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Iron-59 -3.24E-01 2.47E+00 1.49E+00 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Iron-59 -3.29E-01 2.91E+00 1.79E+00 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Iron-59 4.62E-01 4.84E+00 2.75E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Iron-59 -9.39E-01 2.69E+00 1.93E+00 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Iron-59 -2.33E+00 4.23E+00 3.30E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Iron-59 -3.84E-01 3.75E+00 2.24E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Iron-59 -8.27E-01 2.61E+00 2.21E+00 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Iron-59 -5.14E-01 3.69E+00 2.23E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Iron-59 -9.29E-01 3.31E+00 2.09E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Lanthanum-140 -1.16E+00 2.40E+00 1.70E+00 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Lanthanum-140 -2.46E-01 1.46E+00 1.03E+00 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Lanthanum-140 -4.93E-01 2.10E+00 1.35E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Lanthanum-140 4.62E-01 1.95E+00 1.15E+00 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Lanthanum-140 -5.34E-01 2.14E+00 1.34E+00 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Lanthanum-140 -2.48E+00 4.26E+00 3.12E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Lanthanum-140 3.33E-01 2.21E+00 1.29E+00 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Lanthanum-140 -2.17E+00 3.85E+00 3.18E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Lanthanum-140 8.19E-01 3.59E+00 2.12E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Lanthanum-140 2.76E-02 2.54E+00 1.52E+00 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Lanthanum-140 3.10E-01 3.22E+00 1.93E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Lanthanum-140 3.08E-01 3.11E+00 1.86E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Manganese-54 6.40E-01 1.56E+00 9.10E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Manganese-54 -2.47E-01 1.15E+00 7.25E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Manganese-54 5.13E-01 1.41E+00 8.16E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Manganese-54 3.93E-02 1.38E+00 1.28E+00 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Manganese-54 -2.31E-01 1.28E+00 7.78E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Manganese-54 -6.59E-02 2.18E+00 1.32E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Manganese-54 4.32E-01 1.32E+00 7.97E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Manganese-54 -1.33E-01 1.90E+00 1.17E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Manganese-54 -1.52E-02 1.79E+00 1.09E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Manganese-54 1.47E-02 1.30E+00 7.95E-01 pCi/L 261

2020 DCPP REMP Analysis Results Appendix A OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Manganese-54 -9.48E-02 1.72E+00 1.21E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Manganese-54 -1.39E-01 1.55E+00 9.76E-01 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Nickel-63 1.90E+01 3.15E+01 1.99E+01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Nickel-63 6.91E+00 3.79E+01 2.29E+01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Nickel-63 1.11E+01 1.96E+01 1.21E+01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Nickel-63 -2.12E+01 4.04E+01 2.31E+01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Nickel-63 2.11E+00 3.18E+01 1.90E+01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Nickel-63 1.12E+01 3.01E+01 1.85E+01 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Nickel-63 -1.76E+01 4.01E+01 2.32E+01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Nickel-63 1.64E+01 4.09E+01 2.52E+01 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Nickel-63 2.21E+01 2.95E+01 1.87E+01 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Nickel-63 2.02E+00 1.93E+01 1.16E+01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Nickel-63 1.22E+01 4.03E+01 2.46E+01 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Nickel-63 1.76E+00 3.66E+01 2.19E+01 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Niobium-95 6.13E-01 1.54E+00 9.44E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Niobium-95 7.69E-01 1.31E+00 8.07E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Niobium-95 1.37E-01 1.40E+00 8.55E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Niobium-95 5.14E-01 1.48E+00 9.11E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Niobium-95 -5.61E-02 1.45E+00 8.49E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Niobium-95 4.94E-01 2.48E+00 1.46E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Niobium-95 4.00E-01 1.30E+00 7.81E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Niobium-95 -8.14E-01 2.24E+00 3.08E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Niobium-95 -1.89E-01 1.80E+00 1.10E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Niobium-95 -1.55E+00 1.40E+00 1.74E+00 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Niobium-95 -8.39E-03 1.75E+00 1.05E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Niobium-95 -8.96E-01 1.62E+00 1.15E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Total Strontium -7.09E-02 5.17E-01 3.00E-01 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Total Strontium 2.32E-01 4.84E-01 3.20E-01 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Total Strontium 4.73E-01 1.09E+00 6.99E-01 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Total Strontium 7.10E-01 8.96E-01 6.20E-01 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Total Strontium -2.89E-02 9.33E-01 5.51E-01 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Total Strontium 5.63E-01 1.38E+00 8.66E-01 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Total Strontium 4.92E-01 1.07E+00 6.88E-01 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Total Strontium 1.52E-01 8.53E-01 5.28E-01 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Total Strontium 1.32E-01 1.87E+00 1.12E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Total Strontium 2.21E-01 1.56E+00 9.69E-01 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Total Strontium -2.72E-01 1.35E+00 7.81E-01 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Total Strontium -3.37E-02 6.65E-01 3.92E-01 pCi/L 262

2020 DCPP REMP Analysis Results Appendix A OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Tritium 3.95E+01 2.79E+02 1.68E+02 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Tritium -1.91E+01 3.10E+02 1.84E+02 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Tritium 5.31E+01 2.92E+02 1.77E+02 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Tritium 7.19E+01 2.79E+02 1.70E+02 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Tritium 1.20E+02 2.59E+02 1.63E+02 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Tritium 1.27E+02 2.72E+02 1.69E+02 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Tritium 5.77E+01 3.30E+02 2.00E+02 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Tritium 6.30E+01 2.59E+02 1.58E+02 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Tritium 1.93E+00 3.23E+02 1.93E+02 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Tritium -5.13E+01 3.60E+02 2.12E+02 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Tritium -4.32E+01 2.64E+02 1.55E+02 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Tritium 3.15E+02 3.73E+02 2.50E+02 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Zinc-65 -2.19E+00 2.29E+00 2.02E+00 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Zinc-65 -1.12E+00 2.50E+00 3.36E+00 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Zinc-65 -4.09E-01 2.58E+00 1.79E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Zinc-65 -7.93E-02 2.98E+00 2.57E+00 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Zinc-65 -4.22E+00 2.75E+00 3.74E+00 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Zinc-65 -2.70E+00 3.57E+00 2.72E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Zinc-65 -1.66E+00 2.63E+00 2.08E+00 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Zinc-65 -2.88E+00 3.98E+00 2.95E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Zinc-65 -1.13E+00 3.31E+00 2.12E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Zinc-65 -2.32E-01 2.65E+00 1.56E+00 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Zinc-65 -1.24E+00 3.62E+00 2.32E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Zinc-65 -3.81E-01 3.23E+00 2.23E+00 pCi/L OEL Offsite Emergency Lab(500502007) - DW 14-Jan-20 Zirconium-95 9.94E-01 2.77E+00 1.69E+00 pCi/L OEL Offsite Emergency Lab(502412004) - DW 4-Feb-20 Zirconium-95 1.66E-01 2.05E+00 1.22E+00 pCi/L OEL Offsite Emergency Lab(505351003) - DW 4-Mar-20 Zirconium-95 3.00E-01 2.28E+00 1.39E+00 pCi/L OEL Offsite Emergency Lab(508672003) - DW 7-Apr-20 Zirconium-95 -2.33E-01 2.20E+00 1.38E+00 pCi/L OEL Offsite Emergency Lab(509753003) - DW 6-May-20 Zirconium-95 4.04E-01 2.57E+00 1.49E+00 pCi/L OEL Offsite Emergency Lab(512119003) - DW 2-Jun-20 Zirconium-95 2.99E-01 4.35E+00 2.59E+00 pCi/L OEL Offsite Emergency Lab(515497001) - DW 7-Jul-20 Zirconium-95 -1.23E+00 2.17E+00 1.53E+00 pCi/L OEL Offsite Emergency Lab(517959001) - DW 12-Aug-20 Zirconium-95 -8.39E-01 3.62E+00 2.30E+00 pCi/L OEL Offsite Emergency Lab(520032001) - DW 2-Sep-20 Zirconium-95 -5.74E-01 3.14E+00 1.95E+00 pCi/L OEL Offsite Emergency Lab(523745001) - DW 6-Oct-20 Zirconium-95 3.16E-01 2.31E+00 1.38E+00 pCi/L OEL Offsite Emergency Lab(525831003) - DW 3-Nov-20 Zirconium-95 6.69E-01 3.10E+00 1.83E+00 pCi/L OEL Offsite Emergency Lab(528796003) - DW 2-Dec-20 Zirconium-95 -7.59E-01 2.79E+00 1.82E+00 pCi/L 263

2020 DCPP REMP Analysis Results Appendix A OUT Plant Outfall - Seawater Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units OUT Plant Outfall(501627005) - SW 23-Jan-20 BETA 3.04E+02 1.45E+02 1.08E+02 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 BETA 3.48E+02 1.48E+02 1.13E+02 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 BETA 3.95E+02 1.07E+02 1.01E+02 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 BETA 2.42E+02 1.46E+02 1.02E+02 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 BETA 2.30E+02 1.79E+02 1.20E+02 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 BETA 2.73E+02 1.28E+02 9.62E+01 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 BETA 3.87E+02 1.43E+02 1.15E+02 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 BETA 3.89E+02 1.60E+02 1.23E+02 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 BETA 3.35E+02 1.54E+02 1.14E+02 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 BETA 3.00E+02 1.31E+02 9.96E+01 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 BETA 3.84E+02 1.10E+02 1.01E+02 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 BETA 2.68E+02 9.91E+01 8.26E+01 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 BETA 3.07E+02 1.02E+02 8.81E+01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Barium-140 5.47E-02 9.95E+00 5.96E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Barium-140 -1.36E+00 9.69E+00 5.93E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Barium-140 1.65E-01 7.34E+00 4.44E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Barium-140 2.08E+00 7.35E+00 4.68E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Barium-140 -1.76E+00 8.75E+00 5.59E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Barium-140 7.62E+00 1.10E+01 6.88E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Barium-140 4.42E+00 7.38E+00 4.56E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Barium-140 7.99E-02 7.26E+00 5.04E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Barium-140 -8.15E-01 9.68E+00 6.01E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Barium-140 3.89E+00 9.64E+00 5.78E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Barium-140 -9.59E-01 9.47E+00 5.86E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Barium-140 -1.61E+00 8.66E+00 5.28E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Barium-140 -6.43E-02 7.39E+00 4.35E+00 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Cesium-134 6.54E-01 2.03E+00 1.22E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Cesium-134 -1.88E-01 2.34E+00 1.40E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Cesium-134 -1.70E-01 1.64E+00 1.00E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Cesium-134 1.49E-02 1.64E+00 9.99E-01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Cesium-134 1.85E-03 1.86E+00 1.10E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Cesium-134 7.91E-01 2.30E+00 1.34E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Cesium-134 -1.10E-01 1.44E+00 8.89E-01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Cesium-134 5.82E-01 1.62E+00 9.55E-01 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Cesium-134 -5.08E-01 2.10E+00 1.29E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Cesium-134 6.98E-01 1.94E+00 1.16E+00 pCi/L 264

2020 DCPP REMP Analysis Results Appendix A OUT Plant Outfall(525420001) - SW 26-Oct-20 Cesium-134 -2.98E-01 2.11E+00 1.26E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Cesium-134 -1.34E-01 1.81E+00 1.12E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Cesium-134 2.55E-01 1.46E+00 9.12E-01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Cesium-137 1.15E+00 1.98E+00 1.23E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Cesium-137 -1.60E-01 2.05E+00 1.21E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Cesium-137 7.39E-01 1.49E+00 9.34E-01 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Cesium-137 -1.35E-01 1.53E+00 9.33E-01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Cesium-137 -6.47E-01 1.68E+00 1.06E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Cesium-137 -4.04E-01 2.42E+00 1.48E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Cesium-137 6.08E-01 1.47E+00 8.83E-01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Cesium-137 -5.46E-01 1.47E+00 1.05E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Cesium-137 6.60E-01 2.15E+00 1.24E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Cesium-137 -4.31E-01 1.65E+00 1.05E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Cesium-137 -9.53E-01 1.90E+00 1.24E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Cesium-137 5.30E-01 1.98E+00 1.17E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Cesium-137 -3.85E-01 1.42E+00 8.89E-01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Cobalt-58 -8.91E-01 1.69E+00 1.33E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Cobalt-58 -4.52E-01 2.10E+00 1.29E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Cobalt-58 1.29E-01 1.52E+00 8.81E-01 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Cobalt-58 1.68E-01 1.45E+00 9.77E-01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Cobalt-58 -1.63E-01 1.71E+00 1.02E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Cobalt-58 -7.25E-01 2.12E+00 1.40E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Cobalt-58 -5.70E-01 1.29E+00 8.74E-01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Cobalt-58 6.28E-01 1.63E+00 9.64E-01 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Cobalt-58 8.34E-02 2.02E+00 1.18E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Cobalt-58 -1.78E-01 1.78E+00 1.10E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Cobalt-58 5.82E-01 2.06E+00 1.34E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Cobalt-58 -1.04E-01 1.81E+00 1.11E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Cobalt-58 -2.72E-01 1.25E+00 8.91E-01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Cobalt-60 -2.19E+00 1.87E+00 2.23E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Cobalt-60 4.56E-01 2.49E+00 1.45E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Cobalt-60 -3.85E-01 1.40E+00 9.12E-01 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Cobalt-60 5.79E-01 1.74E+00 1.00E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Cobalt-60 7.61E-01 1.98E+00 1.14E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Cobalt-60 6.56E-01 2.54E+00 1.44E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Cobalt-60 5.01E-01 1.61E+00 9.34E-01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Cobalt-60 2.98E-01 1.65E+00 9.90E-01 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Cobalt-60 1.45E+00 2.28E+00 1.40E+00 pCi/L 265

2020 DCPP REMP Analysis Results Appendix A OUT Plant Outfall(524334001) - SW 19-Oct-20 Cobalt-60 6.20E-02 2.08E+00 1.28E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Cobalt-60 1.71E-01 2.15E+00 1.29E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Cobalt-60 1.41E+00 2.14E+00 1.30E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Cobalt-60 2.17E-01 1.39E+00 7.93E-01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Iodine-131 -1.92E+00 3.45E+00 3.60E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Iodine-131 -6.20E-01 3.46E+00 2.08E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Iodine-131 -1.21E-01 2.55E+00 1.50E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Iodine-131 -1.51E+00 2.34E+00 1.60E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Iodine-131 -5.16E-01 3.32E+00 2.04E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Iodine-131 1.28E+00 3.32E+00 2.24E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Iodine-131 1.22E+00 2.83E+00 1.67E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Iodine-131 1.70E+00 3.16E+00 1.99E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Iodine-131 -8.33E-01 3.53E+00 2.19E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Iodine-131 -4.47E-01 3.44E+00 2.31E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Iodine-131 5.00E-01 3.25E+00 1.92E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Iodine-131 6.70E-01 2.92E+00 1.68E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Iodine-131 -1.46E+00 2.39E+00 1.60E+00 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Iron-55 3.69E+01 8.59E+01 6.38E+01 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Iron-55 -2.43E+01 9.51E+01 6.74E+01 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Iron-55 3.56E+01 1.48E+02 1.06E+02 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Iron-55 6.46E+00 8.02E+01 5.96E+01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Iron-55 1.55E+01 1.57E+02 1.10E+02 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Iron-55 7.05E+00 3.91E+01 2.60E+01 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Iron-55 1.71E+00 5.33E+01 3.40E+01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Iron-55 3.63E+00 8.11E+01 6.13E+01 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Iron-55 7.18E+01 7.87E+01 6.47E+01 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Iron-55 -2.24E+01 1.08E+02 6.80E+01 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Iron-55 -6.75E+00 1.30E+02 8.25E+01 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Iron-55 -1.08E+01 1.84E+02 1.13E+02 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Iron-55 3.78E+01 1.19E+02 7.67E+01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Iron-59 4.86E-02 3.84E+00 2.36E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Iron-59 3.27E+00 4.80E+00 2.65E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Iron-59 1.15E+00 3.31E+00 1.98E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Iron-59 -7.51E-01 3.25E+00 1.98E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Iron-59 4.36E+00 4.36E+00 4.52E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Iron-59 -2.45E+00 4.67E+00 3.57E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Iron-59 -7.59E-01 3.01E+00 1.84E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Iron-59 8.10E-01 3.21E+00 1.91E+00 pCi/L 266

2020 DCPP REMP Analysis Results Appendix A OUT Plant Outfall(519822003) - SW 1-Sep-20 Iron-59 -8.03E-03 4.37E+00 2.62E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Iron-59 -7.78E-01 3.74E+00 2.40E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Iron-59 3.95E-01 4.44E+00 2.63E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Iron-59 -1.36E+00 3.85E+00 2.42E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Iron-59 -8.15E-01 2.87E+00 1.89E+00 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Lanthanum-140 7.07E-01 3.07E+00 1.74E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Lanthanum-140 1.88E+00 3.62E+00 2.18E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Lanthanum-140 -4.53E-01 2.26E+00 1.39E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Lanthanum-140 -4.50E-01 2.33E+00 1.46E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Lanthanum-140 -1.53E-01 3.51E+00 2.08E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Lanthanum-140 2.11E-02 3.09E+00 1.84E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Lanthanum-140 -2.29E-01 2.16E+00 1.33E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Lanthanum-140 -6.15E-01 2.25E+00 1.41E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Lanthanum-140 -7.43E-01 2.82E+00 1.78E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Lanthanum-140 -7.08E-01 3.01E+00 1.85E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Lanthanum-140 -9.08E-01 2.92E+00 1.86E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Lanthanum-140 -5.31E-01 2.72E+00 1.70E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Lanthanum-140 -3.70E-01 2.33E+00 1.43E+00 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Manganese-54 1.17E+00 1.79E+00 1.21E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Manganese-54 -6.08E-01 2.07E+00 1.29E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Manganese-54 5.44E-01 1.40E+00 8.23E-01 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Manganese-54 1.08E-01 1.45E+00 8.76E-01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Manganese-54 7.32E-01 1.83E+00 1.09E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Manganese-54 4.23E-01 2.27E+00 1.34E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Manganese-54 1.82E-01 1.37E+00 8.25E-01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Manganese-54 7.98E-01 1.50E+00 9.31E-01 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Manganese-54 -6.41E-01 2.09E+00 2.46E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Manganese-54 -2.26E-01 1.60E+00 1.12E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Manganese-54 -4.74E-01 1.80E+00 1.12E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Manganese-54 -2.70E-01 1.66E+00 1.05E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Manganese-54 6.43E-02 1.23E+00 7.43E-01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Nickel-63 5.15E+00 1.64E+01 1.00E+01 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Nickel-63 9.88E-01 4.32E+01 2.58E+01 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Nickel-63 -1.27E+01 3.17E+01 1.85E+01 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Nickel-63 1.34E+00 2.31E+01 1.38E+01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Nickel-63 1.73E+01 4.34E+01 2.64E+01 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Nickel-63 1.19E+01 3.13E+01 1.93E+01 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Nickel-63 -8.53E+00 3.44E+01 2.03E+01 pCi/L 267

2020 DCPP REMP Analysis Results Appendix A OUT Plant Outfall(517385001) - SW 10-Aug-20 Nickel-63 -3.08E-01 3.63E+01 2.16E+01 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Nickel-63 3.85E+00 3.55E+01 2.13E+01 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Nickel-63 2.61E+00 3.34E+01 2.00E+01 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Nickel-63 -1.46E+01 4.42E+01 2.56E+01 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Nickel-63 -2.20E-01 2.61E+01 1.55E+01 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Nickel-63 -1.40E+01 2.75E+01 1.58E+01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Niobium-95 -1.10E+00 1.99E+00 1.89E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Niobium-95 6.87E-01 2.18E+00 1.29E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Niobium-95 5.67E-01 1.52E+00 8.91E-01 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Niobium-95 -1.77E-01 1.45E+00 8.99E-01 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Niobium-95 -2.00E+00 2.04E+00 1.99E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Niobium-95 4.07E-01 2.25E+00 1.32E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Niobium-95 4.49E-01 1.45E+00 8.73E-01 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Niobium-95 1.31E+00 1.66E+00 1.16E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Niobium-95 9.63E-01 2.11E+00 1.25E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Niobium-95 9.50E-01 1.84E+00 1.12E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Niobium-95 2.07E+00 2.07E+00 2.44E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Niobium-95 4.94E-01 2.12E+00 2.45E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Niobium-95 1.50E-01 1.41E+00 8.39E-01 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Total Strontium -2.18E+00 2.37E+00 1.32E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Total Strontium 1.01E+00 1.93E+00 1.22E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Total Strontium -7.37E-02 2.03E+00 1.21E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Total Strontium -1.17E+00 3.62E+00 2.13E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Total Strontium 8.30E-01 2.61E+00 1.61E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Total Strontium -3.73E+00 3.01E+00 1.61E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Total Strontium -2.46E+00 7.13E+00 3.92E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Total Strontium -1.44E+00 3.70E+00 2.15E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Total Strontium -8.08E-01 3.12E+00 1.83E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Total Strontium 4.29E-01 2.41E+00 1.46E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Total Strontium 1.49E+00 1.64E+00 1.10E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Total Strontium 7.38E-01 2.69E+00 1.64E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Total Strontium 6.44E-01 2.26E+00 1.38E+00 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Tritium 5.40E+01 2.64E+02 1.60E+02 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Tritium -2.34E+02 3.09E+02 1.74E+02 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Tritium 3.23E+01 2.90E+02 1.75E+02 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Tritium -7.32E+01 2.42E+02 1.41E+02 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Tritium -4.98E+01 2.69E+02 1.58E+02 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Tritium 2.94E+01 3.02E+02 1.81E+02 pCi/L 268

2020 DCPP REMP Analysis Results Appendix A OUT Plant Outfall(514719001) - SW 14-Jul-20 Tritium 4.12E+01 2.78E+02 1.67E+02 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Tritium -2.74E+01 2.58E+02 1.52E+02 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Tritium -2.08E+02 3.25E+02 1.84E+02 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Tritium -1.78E+02 2.86E+02 1.62E+02 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Tritium 1.10E+02 3.18E+02 1.97E+02 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Tritium 1.50E+02 2.37E+02 1.51E+02 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Tritium 2.55E+02 3.57E+02 2.34E+02 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Zinc-65 -2.51E-01 3.95E+00 2.47E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Zinc-65 -1.49E+00 4.76E+00 3.06E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Zinc-65 1.33E+00 3.30E+00 2.22E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Zinc-65 6.02E-01 3.56E+00 2.04E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Zinc-65 -8.87E-01 3.72E+00 2.37E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Zinc-65 1.51E+00 5.76E+00 3.27E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Zinc-65 -3.52E-01 2.90E+00 1.72E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Zinc-65 1.82E-01 3.39E+00 2.03E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Zinc-65 -1.93E+00 4.03E+00 2.75E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Zinc-65 -4.96E-01 3.52E+00 2.51E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Zinc-65 -1.64E+00 3.96E+00 2.64E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Zinc-65 1.41E+00 3.94E+00 2.50E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Zinc-65 1.35E+00 3.00E+00 1.74E+00 pCi/L OUT Plant Outfall(501627005) - SW 23-Jan-20 Zirconium-95 -5.48E-02 3.07E+00 2.10E+00 pCi/L OUT Plant Outfall(503808001) - SW 18-Feb-20 Zirconium-95 5.08E-01 3.74E+00 2.18E+00 pCi/L OUT Plant Outfall(505737001) - SW 3-Mar-20 Zirconium-95 -4.78E-01 2.49E+00 1.49E+00 pCi/L OUT Plant Outfall(508947003) - SW 13-Apr-20 Zirconium-95 9.81E-01 2.77E+00 1.66E+00 pCi/L OUT Plant Outfall(510649001) - SW 11-May-20 Zirconium-95 9.86E-01 3.29E+00 1.93E+00 pCi/L OUT Plant Outfall(513548001) - SW 22-Jun-20 Zirconium-95 -2.60E+00 4.34E+00 4.42E+00 pCi/L OUT Plant Outfall(514719001) - SW 14-Jul-20 Zirconium-95 6.75E-01 2.56E+00 1.53E+00 pCi/L OUT Plant Outfall(517385001) - SW 10-Aug-20 Zirconium-95 6.11E-01 2.48E+00 1.44E+00 pCi/L OUT Plant Outfall(519822003) - SW 1-Sep-20 Zirconium-95 1.32E+00 3.86E+00 2.25E+00 pCi/L OUT Plant Outfall(524334001) - SW 19-Oct-20 Zirconium-95 2.41E-01 3.04E+00 1.82E+00 pCi/L OUT Plant Outfall(525420001) - SW 26-Oct-20 Zirconium-95 2.34E-01 3.69E+00 2.13E+00 pCi/L OUT Plant Outfall(526083001) - SW 5-Nov-20 Zirconium-95 -3.45E-01 3.44E+00 2.11E+00 pCi/L OUT Plant Outfall(528799003) - SW 2-Dec-20 Zirconium-95 -1.46E-01 2.26E+00 1.38E+00 pCi/L OW1 Observation Well 01 - Groundwater Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units OW1 Observation Well 01(501846003) - GW 28-Jan-20 BETA 1.40E+01 6.46E+00 4.83E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 BETA 9.99E+00 5.16E+00 3.79E+00 pCi/L 269

2020 DCPP REMP Analysis Results Appendix A OW1 Observation Well 01(515652004) - GW 22-Jul-20 BETA 3.19E+00 8.41E+00 5.15E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 BETA 5.84E+00 5.82E+00 3.78E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Barium-140 -3.86E-01 7.35E+00 4.34E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Barium-140 -2.16E+00 8.46E+00 5.12E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Barium-140 1.68E+00 8.33E+00 4.96E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Barium-140 3.98E+00 8.22E+00 5.53E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Cesium-134 -1.02E-01 1.52E+00 9.26E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Cesium-134 3.83E-01 2.02E+00 1.19E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Cesium-134 -2.14E-01 1.53E+00 9.01E-01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Cesium-134 3.75E-01 1.89E+00 1.09E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Cesium-137 4.24E-01 1.66E+00 9.78E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Cesium-137 -6.25E-01 1.90E+00 1.19E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Cesium-137 6.09E-01 1.60E+00 9.74E-01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Cesium-137 2.17E-01 1.77E+00 1.02E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Cobalt-58 3.98E-01 1.49E+00 8.83E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Cobalt-58 -6.00E-01 1.86E+00 1.18E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Cobalt-58 -2.56E-01 1.35E+00 8.10E-01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Cobalt-58 -5.69E-02 1.68E+00 1.12E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Cobalt-60 1.83E-01 1.61E+00 9.23E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Cobalt-60 6.58E-01 2.18E+00 1.26E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Cobalt-60 4.96E-01 1.58E+00 9.27E-01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Cobalt-60 -4.68E-01 1.74E+00 1.10E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Iodine-131 -6.70E-01 2.56E+00 1.53E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Iodine-131 -7.31E-01 3.22E+00 2.02E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Iodine-131 1.39E+00 3.15E+00 3.44E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Iodine-131 1.55E+00 2.96E+00 1.90E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Iron-55 1.26E+01 6.60E+01 4.90E+01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Iron-55 1.39E+01 6.35E+01 4.55E+01 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Iron-55 1.67E+01 4.01E+01 2.69E+01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Iron-55 -9.16E+00 1.24E+02 7.99E+01 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Iron-59 -1.03E+00 2.85E+00 1.94E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Iron-59 3.44E-01 4.17E+00 2.52E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Iron-59 -9.29E-01 2.96E+00 1.88E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Iron-59 2.00E-01 3.49E+00 2.05E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Lanthanum-140 -8.91E-01 2.16E+00 1.46E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Lanthanum-140 -6.01E-01 3.27E+00 2.02E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Lanthanum-140 2.59E-01 2.87E+00 1.73E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Lanthanum-140 4.88E-01 2.93E+00 1.73E+00 pCi/L 270

2020 DCPP REMP Analysis Results Appendix A OW1 Observation Well 01(501846003) - GW 28-Jan-20 Manganese-54 6.25E-01 1.57E+00 9.43E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Manganese-54 8.45E-01 1.95E+00 1.73E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Manganese-54 6.22E-03 1.41E+00 8.16E-01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Manganese-54 -2.23E-01 1.63E+00 9.73E-01 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Nickel-63 2.64E+01 2.86E+01 1.86E+01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Nickel-63 -7.40E+00 3.37E+01 1.98E+01 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Nickel-63 7.33E+00 2.89E+01 1.76E+01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Nickel-63 8.80E-01 3.31E+01 1.97E+01 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Niobium-95 1.20E+00 1.47E+00 9.92E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Niobium-95 4.90E-01 1.97E+00 1.16E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Niobium-95 7.59E-01 1.63E+00 1.11E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Niobium-95 9.16E-01 1.79E+00 1.97E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Total Strontium -4.78E-03 9.79E-01 5.83E-01 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Total Strontium 2.00E-01 1.35E+00 8.30E-01 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Total Strontium -7.57E-01 1.64E+00 9.25E-01 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Total Strontium -9.28E-01 1.78E+00 9.93E-01 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Tritium 4.99E+02 2.62E+02 2.02E+02 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Tritium 4.12E+02 3.10E+02 2.22E+02 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Tritium 4.94E+02 3.15E+02 2.29E+02 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Tritium 5.86E+02 2.84E+02 2.25E+02 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Zinc-65 8.70E-01 2.81E+00 1.85E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Zinc-65 2.34E-01 4.00E+00 2.78E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Zinc-65 6.87E-01 3.23E+00 2.12E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Zinc-65 8.69E-01 3.76E+00 2.47E+00 pCi/L OW1 Observation Well 01(501846003) - GW 28-Jan-20 Zirconium-95 -2.05E-01 2.77E+00 1.68E+00 pCi/L OW1 Observation Well 01(510536003) - GW 5-May-20 Zirconium-95 1.56E+00 3.45E+00 2.06E+00 pCi/L OW1 Observation Well 01(515652004) - GW 22-Jul-20 Zirconium-95 1.84E+00 2.94E+00 1.87E+00 pCi/L OW1 Observation Well 01(522579003) - GW 14-Oct-20 Zirconium-95 -3.12E-01 2.94E+00 1.74E+00 pCi/L PMO Pismo Beach Sand Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units PMO Pismo Beach(506490001) - SD 18-Mar-20 Barium-140 -5.28E+01 2.10E+02 1.38E+02 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Barium-140 -9.51E+01 2.24E+02 1.47E+02 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Cesium-134 4.22E+00 5.00E+01 2.76E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Cesium-134 1.34E+01 6.30E+01 3.55E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Cesium-137 1.37E+01 6.29E+01 3.61E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Cesium-137 1.64E+01 5.60E+01 3.22E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Cobalt-58 5.28E+00 5.55E+01 3.08E+01 pCi/kg 271

2020 DCPP REMP Analysis Results Appendix A PMO Pismo Beach(517337001) - SD 6-Aug-20 Cobalt-58 2.63E+01 5.51E+01 3.11E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Cobalt-60 -1.07E+01 6.74E+01 4.23E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Cobalt-60 -1.50E+01 5.74E+01 3.60E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Iron-55 7.26E+03 1.46E+04 1.10E+04 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Iron-55 3.03E+02 1.43E+04 1.10E+04 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Iron-59 -1.46E+01 1.09E+02 6.69E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Iron-59 2.32E+01 1.19E+02 6.84E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Lanthanum-140 -3.24E+01 1.00E+02 7.02E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Lanthanum-140 -7.05E+00 8.11E+01 4.76E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Manganese-54 4.07E+01 6.58E+01 3.65E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Manganese-54 -1.22E+00 4.49E+01 2.59E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Nickel-63 9.06E+02 2.70E+03 1.64E+03 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Nickel-63 -7.21E+02 2.07E+03 1.21E+03 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Niobium-95 2.19E+00 5.86E+01 3.53E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Niobium-95 1.57E+00 5.48E+01 3.10E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Total Strontium -2.27E+02 4.21E+02 2.12E+02 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Total Strontium 4.88E+02 9.39E+02 6.34E+02 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Zinc-65 2.36E+01 1.66E+02 9.38E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Zinc-65 2.18E+01 1.34E+02 8.88E+01 pCi/kg PMO Pismo Beach(506490001) - SD 18-Mar-20 Zirconium-95 4.42E+01 1.14E+02 6.11E+01 pCi/kg PMO Pismo Beach(517337001) - SD 6-Aug-20 Zirconium-95 -9.78E+00 8.35E+01 4.88E+01 pCi/kg PON Pacific Ocean North of Diablo Cove - Aquatic Vegetation Kelp Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units PON Pacific Ocean North of Diablo Cove(501627003) - AV Kelp 23-Jan-20 Cesium-134 7.01E+00 8.89E+00 9.56E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(509770001) - AV Kelp 13-Apr-20 Cesium-134 1.19E+01 1.19E+01 1.33E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(514717003) - AV Kelp 14-Jul-20 Cesium-134 4.04E+00 1.96E+01 1.17E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(522578002) - AV Kelp 19-Oct-20 Cesium-134 6.54E-01 1.40E+01 8.46E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(525420006) - AV Kelp 26-Oct-20 Cesium-134 5.99E-02 1.26E+01 7.76E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(501627003) - AV Kelp 23-Jan-20 Cesium-137 3.09E+00 8.61E+00 5.08E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(509770001) - AV Kelp 13-Apr-20 Cesium-137 -3.38E+00 9.05E+00 6.00E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(514717003) - AV Kelp 14-Jul-20 Cesium-137 1.64E+00 1.59E+01 9.51E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(522578002) - AV Kelp 19-Oct-20 Cesium-137 -2.05E+00 1.38E+01 9.42E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(525420006) - AV Kelp 26-Oct-20 Cesium-137 -2.13E+00 9.99E+00 6.38E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(501627003) - AV Kelp 23-Jan-20 Cobalt-58 4.89E-01 7.56E+00 4.54E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(509770001) - AV Kelp 13-Apr-20 Cobalt-58 6.97E+00 6.97E+00 6.33E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(514717003) - AV Kelp 14-Jul-20 Cobalt-58 -5.96E+00 1.91E+01 1.28E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(522578002) - AV Kelp 19-Oct-20 Cobalt-58 2.86E+00 1.26E+01 7.43E+00 pCi/kg 272

2020 DCPP REMP Analysis Results Appendix A PON Pacific Ocean North of Diablo Cove(525420006) - AV Kelp 26-Oct-20 Cobalt-58 1.44E+00 1.17E+01 7.11E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(501627003) - AV Kelp 23-Jan-20 Cobalt-60 -3.44E+00 9.40E+00 6.11E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(509770001) - AV Kelp 13-Apr-20 Cobalt-60 -2.04E+00 1.20E+01 7.49E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(514717003) - AV Kelp 14-Jul-20 Cobalt-60 5.45E+00 2.36E+01 1.37E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(522578002) - AV Kelp 19-Oct-20 Cobalt-60 -4.80E+00 1.50E+01 9.64E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(525420006) - AV Kelp 26-Oct-20 Cobalt-60 1.64E+00 1.36E+01 7.96E+00 pCi/kg PON Pacific Ocean North of Diablo Cove - Fish Perch Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Cesium-134 1.49E+00 2.34E+01 1.37E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Cesium-134 -2.88E+00 1.99E+01 1.37E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Cesium-134 8.87E+00 2.92E+01 1.79E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Cesium-134 3.34E+00 1.56E+01 9.26E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Cesium-137 7.63E+00 2.33E+01 1.42E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Cesium-137 3.64E+00 1.94E+01 1.60E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Cesium-137 1.49E+01 2.47E+01 2.89E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Cesium-137 3.42E+00 1.65E+01 9.76E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Cobalt-58 3.62E+00 2.62E+01 1.52E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Cobalt-58 6.88E+00 1.95E+01 1.16E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Cobalt-58 2.57E+00 2.63E+01 1.63E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Cobalt-58 1.13E+00 1.69E+01 1.14E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Cobalt-60 -3.97E+00 2.41E+01 1.54E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Cobalt-60 9.08E-01 1.94E+01 1.14E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Cobalt-60 2.42E+00 2.77E+01 1.64E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Cobalt-60 1.06E+01 1.72E+01 1.07E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Iron-59 -1.31E+01 5.54E+01 3.55E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Iron-59 1.75E+01 3.69E+01 4.22E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Iron-59 1.91E+01 6.50E+01 3.79E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Iron-59 1.78E+00 4.00E+01 2.32E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Manganese-54 6.37E+00 2.33E+01 1.51E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Manganese-54 -6.94E+00 1.78E+01 1.13E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Manganese-54 -5.68E+00 2.64E+01 1.74E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Manganese-54 -6.84E+00 1.40E+01 9.83E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(504740005) - FH Perch 12-Feb-20 Zinc-65 -1.26E+01 4.94E+01 3.18E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081003) - FH Perch 10-Jun-20 Zinc-65 2.25E+01 3.97E+01 2.76E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473007) - FH Perch 29-Jul-20 Zinc-65 2.94E+01 6.02E+01 3.56E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(523223002) - FH Perch 19-Oct-20 Zinc-65 -1.18E+00 3.78E+01 2.22E+01 pCi/kg 273

2020 DCPP REMP Analysis Results Appendix A PON Pacific Ocean North of Diablo Cove - Rockfish Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Cesium-134 -4.37E+00 2.11E+01 1.32E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Cesium-134 5.27E+00 2.09E+01 1.26E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Cesium-134 -8.28E+00 3.22E+01 2.16E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Cesium-134 -4.03E+00 2.44E+01 1.49E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Cesium-137 1.26E+01 2.23E+01 1.35E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Cesium-137 6.82E+00 2.05E+01 1.23E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Cesium-137 6.37E+00 3.69E+01 3.27E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Cesium-137 1.47E+01 2.27E+01 2.10E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Cobalt-58 8.28E+00 2.27E+01 1.33E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Cobalt-58 1.39E+01 2.13E+01 1.34E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Cobalt-58 -4.55E+00 2.90E+01 1.90E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Cobalt-58 -9.90E-01 2.67E+01 1.58E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Cobalt-60 -1.82E+01 2.25E+01 2.15E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Cobalt-60 9.50E+00 2.77E+01 2.58E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Cobalt-60 7.30E+00 3.96E+01 2.32E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Cobalt-60 -4.11E+00 2.45E+01 1.57E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Iron-59 2.63E+01 5.59E+01 3.36E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Iron-59 8.19E+00 4.00E+01 2.45E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Iron-59 -1.84E+01 5.88E+01 4.06E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Iron-59 1.01E+01 6.12E+01 3.62E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Manganese-54 4.41E+00 2.08E+01 1.22E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Manganese-54 1.67E-01 1.86E+01 1.15E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Manganese-54 -8.07E+00 3.12E+01 2.10E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Manganese-54 -7.93E+00 1.99E+01 1.31E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(504740001) - FH Rockfsh 12-Feb-20 Zinc-65 1.41E+01 4.90E+01 2.93E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(513081005) - FH Rockfsh 10-Jun-20 Zinc-65 1.74E+01 4.15E+01 2.52E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(517473008) - FH Rockfsh 29-Jul-20 Zinc-65 1.59E+01 7.56E+01 4.39E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(525676003) - FH Rockfsh 19-Oct-20 Zinc-65 -2.26E+00 5.14E+01 3.14E+01 pCi/kg PON Pacific Ocean North of Diablo Cove - Intertidal Mussels Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Cesium-134 3.19E+00 1.57E+01 9.30E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Cesium-137 3.91E+00 1.44E+01 8.42E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Cobalt-58 7.92E+00 1.64E+01 1.07E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Cobalt-60 5.29E+00 1.76E+01 1.01E+01 pCi/kg PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Iron-59 -7.53E+00 4.13E+01 2.50E+01 pCi/kg 274

2020 DCPP REMP Analysis Results Appendix A PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Manganese-54 2.72E+00 1.47E+01 8.77E+00 pCi/kg PON Pacific Ocean North of Diablo Cove(500916006) - IM 21-Jan-20 Zinc-65 7.00E+00 3.55E+01 2.03E+01 pCi/kg POS Pacific Ocean South of Diablo Cove - Aquatic Vegetation Kelp Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units POS Pacific Ocean South of Diablo Cove(501627002) - AV Kelp 23-Jan-20 Cesium-134 3.44E-02 1.31E+01 8.10E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(509770004) - AV Kelp 13-Apr-20 Cesium-134 1.54E+00 8.66E+00 4.93E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(514717004) - AV Kelp 14-Jul-20 Cesium-134 1.40E+01 1.81E+01 2.12E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(522578003) - AV Kelp 19-Oct-20 Cesium-134 4.29E+00 1.37E+01 8.27E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(525420005) - AV Kelp 26-Oct-20 Cesium-134 -1.13E-01 8.94E+00 5.35E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(501627002) - AV Kelp 23-Jan-20 Cesium-137 2.55E+00 1.21E+01 7.21E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(509770004) - AV Kelp 13-Apr-20 Cesium-137 1.97E+00 7.70E+00 4.63E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(514717004) - AV Kelp 14-Jul-20 Cesium-137 4.36E+00 1.49E+01 8.49E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(522578003) - AV Kelp 19-Oct-20 Cesium-137 7.09E+00 1.24E+01 8.78E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(525420005) - AV Kelp 26-Oct-20 Cesium-137 -1.36E+00 8.09E+00 5.11E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(501627002) - AV Kelp 23-Jan-20 Cobalt-58 -3.02E+00 1.27E+01 8.31E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(509770004) - AV Kelp 13-Apr-20 Cobalt-58 -1.68E+00 7.24E+00 5.00E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(514717004) - AV Kelp 14-Jul-20 Cobalt-58 -5.39E+00 1.50E+01 1.03E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(522578003) - AV Kelp 19-Oct-20 Cobalt-58 3.72E+00 1.26E+01 7.57E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(525420005) - AV Kelp 26-Oct-20 Cobalt-58 -7.67E-01 7.83E+00 4.77E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(501627002) - AV Kelp 23-Jan-20 Cobalt-60 1.22E+00 1.54E+01 8.97E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(509770004) - AV Kelp 13-Apr-20 Cobalt-60 6.35E+00 9.54E+00 5.80E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(514717004) - AV Kelp 14-Jul-20 Cobalt-60 2.57E+00 1.72E+01 9.98E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(522578003) - AV Kelp 19-Oct-20 Cobalt-60 -8.07E+00 1.41E+01 1.01E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525420005) - AV Kelp 26-Oct-20 Cobalt-60 -2.89E+00 8.73E+00 5.84E+00 pCi/kg POS Pacific Ocean South of Diablo Cove - Fish Perch Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Cesium-134 1.03E+01 2.64E+01 1.60E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Cesium-134 -3.83E+00 1.92E+01 1.24E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Cesium-134 -1.08E+01 2.38E+01 2.05E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Cesium-134 -8.75E+00 1.85E+01 1.31E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Cesium-137 1.79E+01 2.74E+01 1.75E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Cesium-137 -1.70E+01 1.95E+01 1.81E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Cesium-137 4.85E+00 2.18E+01 1.32E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Cesium-137 1.18E+01 2.10E+01 1.29E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Cobalt-58 8.11E+00 2.79E+01 1.68E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Cobalt-58 8.69E-02 1.84E+01 1.14E+01 pCi/kg 275

2020 DCPP REMP Analysis Results Appendix A POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Cobalt-58 -7.31E+00 1.98E+01 1.36E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Cobalt-58 -1.21E+00 2.37E+01 1.49E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Cobalt-60 -5.94E+00 2.20E+01 1.88E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Cobalt-60 -1.26E+00 1.65E+01 1.00E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Cobalt-60 -5.35E+00 2.31E+01 1.47E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Cobalt-60 -2.32E+00 2.13E+01 1.33E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Iron-59 8.59E+00 5.71E+01 3.48E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Iron-59 -7.31E+00 3.97E+01 2.44E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Iron-59 1.38E+01 4.73E+01 2.71E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Iron-59 4.77E+01 6.58E+01 4.08E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Manganese-54 -4.13E+00 2.00E+01 1.30E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Manganese-54 1.75E+00 1.89E+01 1.15E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Manganese-54 7.91E+00 2.33E+01 1.43E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Manganese-54 4.37E-01 1.91E+01 1.19E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740006) - FH Perch 12-Feb-20 Zinc-65 1.91E+01 5.67E+01 3.44E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081004) - FH Perch 3-Jun-20 Zinc-65 -3.51E+01 4.07E+01 3.98E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473009) - FH Perch 27-Jul-20 Zinc-65 9.88E+00 4.88E+01 2.82E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223003) - FH Perch 9-Oct-20 Zinc-65 1.84E+01 5.31E+01 3.10E+01 pCi/kg POS Pacific Ocean South of Diablo Cove - Rockfish Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Cesium-134 9.88E+00 2.47E+01 1.47E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Cesium-134 8.01E+00 2.89E+01 1.71E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Cesium-134 -2.20E+01 2.48E+01 2.61E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Cesium-134 5.73E+00 2.13E+01 1.22E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Cesium-137 -7.41E+00 2.62E+01 2.16E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Cesium-137 2.51E+01 2.51E+01 2.20E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Cesium-137 1.09E+01 2.32E+01 2.02E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Cesium-137 2.29E+00 1.83E+01 1.25E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Cobalt-58 -1.23E+00 2.45E+01 1.53E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Cobalt-58 1.60E-01 2.27E+01 1.39E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Cobalt-58 -1.00E+01 2.25E+01 1.48E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Cobalt-58 2.82E+00 2.33E+01 1.34E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Cobalt-60 -4.82E-01 2.52E+01 1.53E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Cobalt-60 5.14E+00 2.65E+01 1.67E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Cobalt-60 7.73E+00 2.50E+01 1.67E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Cobalt-60 2.31E+00 1.90E+01 1.12E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Iron-59 -9.97E+00 6.00E+01 4.24E+01 pCi/kg 276

2020 DCPP REMP Analysis Results Appendix A POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Iron-59 6.06E+00 6.86E+01 3.96E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Iron-59 4.94E+01 4.94E+01 4.64E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Iron-59 -1.58E+00 5.22E+01 3.12E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Manganese-54 6.76E+00 2.59E+01 1.56E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Manganese-54 1.36E+00 2.67E+01 1.63E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Manganese-54 -2.10E+00 2.32E+01 1.40E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Manganese-54 -4.07E+00 1.92E+01 1.17E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(504740002) - FH Rockfsh 12-Feb-20 Zinc-65 -7.05E+00 5.26E+01 3.68E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(513081006) - FH Rockfsh 3-Jun-20 Zinc-65 -8.95E+01 5.26E+01 6.00E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(517473010) - FH Rockfsh 27-Jul-20 Zinc-65 2.14E+00 5.14E+01 3.62E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(525676004) - FH Rockfsh 9-Oct-20 Zinc-65 1.86E+01 4.36E+01 2.39E+01 pCi/kg POS Pacific Ocean South of Diablo Cove - Intertidal Mussels Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Cesium-134 6.27E+00 1.68E+01 1.42E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Cesium-134 -2.56E+00 1.99E+01 1.22E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Cesium-134 6.76E+00 2.06E+01 1.31E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Cesium-134 7.33E+00 1.89E+01 1.67E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Cesium-137 1.07E+00 1.50E+01 8.80E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Cesium-137 -4.74E-01 2.05E+01 1.21E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Cesium-137 1.18E+00 1.86E+01 1.13E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Cesium-137 2.86E+00 1.81E+01 1.10E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Cobalt-58 2.11E-01 1.57E+01 1.02E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Cobalt-58 -1.53E+01 1.72E+01 1.84E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Cobalt-58 8.61E-01 1.88E+01 1.09E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Cobalt-58 -7.63E+00 1.65E+01 1.95E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Cobalt-60 -1.72E+00 1.54E+01 9.40E+00 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Cobalt-60 -3.98E+00 1.67E+01 1.07E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Cobalt-60 4.57E+00 2.21E+01 1.31E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Cobalt-60 -3.70E-01 1.70E+01 1.01E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Iron-59 -2.87E+00 3.58E+01 2.45E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Iron-59 7.05E+00 4.07E+01 2.43E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Iron-59 -4.50E+00 4.60E+01 2.82E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Iron-59 3.20E+00 3.66E+01 2.21E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Manganese-54 -3.48E+00 1.47E+01 1.06E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Manganese-54 4.50E+00 2.38E+01 1.83E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Manganese-54 -8.99E-01 1.79E+01 1.06E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Manganese-54 -1.47E+00 1.67E+01 1.00E+01 pCi/kg 277

2020 DCPP REMP Analysis Results Appendix A POS Pacific Ocean South of Diablo Cove(500916001) - IM 21-Jan-20 Zinc-65 2.05E+00 3.73E+01 2.50E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(509741002) - IM 14-Apr-20 Zinc-65 5.48E-02 4.20E+01 2.58E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(515653003) - IM 23-Jul-20 Zinc-65 -1.12E+01 4.07E+01 2.63E+01 pCi/kg POS Pacific Ocean South of Diablo Cove(523223010) - IM 27-Oct-20 Zinc-65 -3.40E+00 3.61E+01 2.59E+01 pCi/kg WN2 Diablo Creek Outlet - Drinking Water Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 BETA 1.40E+00 2.33E+00 1.46E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 BETA 2.32E+00 2.71E+00 1.72E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 BETA 2.35E+00 2.04E+00 1.36E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 BETA 3.01E+00 1.92E+00 1.35E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Barium-140 4.21E+00 8.56E+00 5.29E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Barium-140 -2.74E+00 5.44E+00 3.62E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Barium-140 1.16E+00 1.14E+01 6.58E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Barium-140 -3.05E-01 8.10E+00 4.78E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Cesium-134 5.24E-02 1.64E+00 9.58E-01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Cesium-134 7.14E-01 1.69E+00 1.02E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Cesium-134 -1.88E+00 2.16E+00 2.23E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Cesium-134 -4.85E-02 1.53E+00 9.19E-01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Cesium-137 -3.04E-01 1.64E+00 9.76E-01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Cesium-137 -3.35E-01 1.47E+00 9.10E-01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Cesium-137 1.10E+00 2.42E+00 1.43E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Cesium-137 2.75E-01 1.40E+00 8.23E-01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Cobalt-58 4.13E-01 1.65E+00 9.54E-01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Cobalt-58 -5.06E-01 1.20E+00 8.09E-01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Cobalt-58 -5.80E-01 2.13E+00 1.37E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Cobalt-58 -4.30E-01 1.38E+00 8.84E-01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Cobalt-60 -3.42E-01 1.69E+00 1.09E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Cobalt-60 -8.49E-01 1.13E+00 9.85E-01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Cobalt-60 1.05E+00 2.24E+00 1.25E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Cobalt-60 5.33E-02 1.55E+00 1.24E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Iodine-131 8.22E-01 8.22E-01 6.91E-01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Iodine-131 -1.19E-01 5.47E-01 3.27E-01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Iodine-131 2.44E-02 6.61E-01 3.81E-01 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Iodine-131 8.42E-02 6.12E-01 3.51E-01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Iron-55 2.75E+01 6.56E+01 4.98E+01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Iron-55 1.07E+01 7.94E+01 5.93E+01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Iron-55 -2.14E+00 4.56E+01 2.90E+01 pCi/L 278

2020 DCPP REMP Analysis Results Appendix A WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Iron-55 4.72E+01 1.22E+02 8.41E+01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Iron-59 -5.57E-01 3.48E+00 2.16E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Iron-59 -1.33E+00 2.53E+00 1.83E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Iron-59 -3.46E-01 4.29E+00 2.52E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Iron-59 -7.54E-01 2.51E+00 1.66E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Lanthanum-140 8.84E-01 2.89E+00 1.65E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Lanthanum-140 -1.02E+00 2.62E+00 2.78E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Lanthanum-140 -1.82E+00 4.06E+00 2.80E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Lanthanum-140 -9.64E-01 2.46E+00 1.61E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Manganese-54 -5.77E-01 1.62E+00 1.03E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Manganese-54 -7.72E-02 1.34E+00 8.62E-01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Manganese-54 2.85E-01 1.98E+00 1.31E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Manganese-54 8.00E-01 1.25E+00 1.18E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Nickel-63 1.52E+01 2.85E+01 1.79E+01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Nickel-63 1.20E+01 3.43E+01 2.11E+01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Nickel-63 -1.13E+01 3.89E+01 2.27E+01 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Nickel-63 3.19E-01 2.17E+01 1.29E+01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Niobium-95 -1.43E+00 1.68E+00 2.11E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Niobium-95 -1.08E+00 1.50E+00 1.46E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Niobium-95 -1.08E-01 2.35E+00 1.42E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Niobium-95 -5.91E-01 1.33E+00 8.83E-01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Total Strontium -3.18E-01 4.43E-01 2.21E-01 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Total Strontium 4.79E-01 1.43E+00 9.01E-01 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Total Strontium -2.64E-01 1.34E+00 7.77E-01 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Total Strontium 3.52E-01 1.54E+00 9.68E-01 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Tritium -3.31E+01 2.82E+02 1.66E+02 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Tritium -6.84E+01 2.38E+02 1.39E+02 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Tritium 6.07E+01 3.20E+02 1.94E+02 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Tritium 7.65E+01 3.48E+02 2.12E+02 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Zinc-65 -5.86E-01 3.79E+00 2.35E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Zinc-65 -1.39E+00 2.68E+00 2.18E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Zinc-65 6.52E-01 4.70E+00 2.98E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Zinc-65 5.54E-01 2.76E+00 1.66E+00 pCi/L WN2 Diablo Creek Outlet(500502008) - DW 14-Jan-20 Zirconium-95 6.67E-01 2.97E+00 1.71E+00 pCi/L WN2 Diablo Creek Outlet(508985002) - DW 14-Apr-20 Zirconium-95 -2.40E-02 2.37E+00 1.43E+00 pCi/L WN2 Diablo Creek Outlet(515497002) - DW 7-Jul-20 Zirconium-95 -8.91E-01 3.91E+00 2.47E+00 pCi/L WN2 Diablo Creek Outlet(523745002) - DW 6-Oct-20 Zirconium-95 -6.33E-01 2.41E+00 1.52E+00 pCi/L 279

2020 DCPP REMP Analysis Results Appendix A WW2 Water Well 02 - Drinking Water Sample Name Date Collected Nuclide Result MDC 2 Sigma TPU Units WW2 Water Well 02(500502005) - DW 14-Jan-20 BETA 2.43E+00 2.15E+00 1.46E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 BETA 4.91E+00 2.85E+00 2.02E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 BETA 4.04E+00 1.95E+00 1.51E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 BETA 1.55E+00 3.05E+00 1.89E+00 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Barium-140 -6.73E+00 8.29E+00 9.65E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Barium-140 4.30E+00 1.16E+01 6.79E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Barium-140 1.27E+00 8.65E+00 5.16E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Barium-140 -1.14E+01 8.27E+00 8.80E+00 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Cesium-134 1.78E-01 1.99E+00 1.14E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Cesium-134 -9.77E-01 2.79E+00 1.82E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Cesium-134 4.69E-02 1.67E+00 9.60E-01 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Cesium-134 2.21E-01 1.59E+00 9.27E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Cesium-137 1.31E+00 1.83E+00 9.47E-01 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Cesium-137 8.32E-02 2.72E+00 1.61E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Cesium-137 3.14E-02 1.76E+00 1.20E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Cesium-137 6.51E-01 1.58E+00 9.57E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Cobalt-58 3.11E-01 1.80E+00 1.16E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Cobalt-58 -7.60E-01 2.32E+00 1.52E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Cobalt-58 9.46E-01 1.70E+00 1.02E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Cobalt-58 -4.95E-01 1.37E+00 9.88E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Cobalt-60 -4.49E-01 2.06E+00 1.31E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Cobalt-60 -5.45E-01 2.85E+00 2.00E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Cobalt-60 -4.49E-01 1.74E+00 1.42E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Cobalt-60 -3.07E-01 1.52E+00 9.40E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Iodine-131 4.15E-02 8.98E-01 5.17E-01 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Iodine-131 -9.08E-02 5.74E-01 3.40E-01 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Iodine-131 -5.78E-03 5.42E-01 3.12E-01 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Iodine-131 -6.64E-02 6.14E-01 3.68E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Iron-55 2.36E+01 6.60E+01 4.98E+01 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Iron-55 -2.17E+01 8.06E+01 5.84E+01 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Iron-55 3.78E+01 4.70E+01 3.36E+01 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Iron-55 3.09E+01 1.31E+02 8.86E+01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Iron-59 7.91E-01 4.26E+00 2.50E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Iron-59 1.35E+00 5.64E+00 3.20E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Iron-59 -2.38E-01 3.12E+00 2.13E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Iron-59 -2.46E+00 2.79E+00 2.20E+00 pCi/L 280

2020 DCPP REMP Analysis Results Appendix A WW2 Water Well 02(500502005) - DW 14-Jan-20 Lanthanum-140 3.09E-01 3.08E+00 1.76E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Lanthanum-140 1.26E-01 4.47E+00 2.65E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Lanthanum-140 -1.52E+00 2.65E+00 1.91E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Lanthanum-140 9.91E-01 3.19E+00 1.85E+00 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Manganese-54 -9.90E-02 1.79E+00 1.05E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Manganese-54 1.16E+00 2.57E+00 2.13E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Manganese-54 -1.34E-01 1.61E+00 9.39E-01 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Manganese-54 -4.15E-02 1.48E+00 8.71E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Nickel-63 7.00E+00 3.01E+01 1.83E+01 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Nickel-63 3.88E+00 3.15E+01 1.90E+01 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Nickel-63 -1.15E+01 3.76E+01 2.19E+01 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Nickel-63 -3.88E+00 1.87E+01 1.10E+01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Niobium-95 1.72E+00 2.12E+00 1.37E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Niobium-95 -3.55E-01 2.43E+00 1.69E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Niobium-95 1.10E+00 1.95E+00 1.55E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Niobium-95 1.39E+00 1.52E+00 8.50E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Total Strontium -3.51E-01 5.13E-01 2.64E-01 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Total Strontium 2.21E-01 1.30E+00 7.93E-01 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Total Strontium 7.90E-02 9.37E-01 5.67E-01 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Total Strontium -1.65E-01 1.41E+00 8.16E-01 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Tritium -9.71E-01 2.77E+02 1.65E+02 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Tritium -8.43E+01 2.39E+02 1.39E+02 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Tritium -2.50E+01 3.33E+02 1.97E+02 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Tritium 1.27E+02 3.39E+02 2.11E+02 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Zinc-65 2.27E+00 3.15E+00 2.41E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Zinc-65 1.11E-01 5.54E+00 3.61E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Zinc-65 2.14E+00 3.31E+00 2.78E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Zinc-65 1.44E+00 3.14E+00 2.11E+00 pCi/L WW2 Water Well 02(500502005) - DW 14-Jan-20 Zirconium-95 2.12E-01 3.43E+00 1.97E+00 pCi/L WW2 Water Well 02(508985003) - DW 14-Apr-20 Zirconium-95 -1.10E+00 4.57E+00 3.57E+00 pCi/L WW2 Water Well 02(514713001) - DW 7-Jul-20 Zirconium-95 1.06E+00 2.93E+00 1.79E+00 pCi/L WW2 Water Well 02(523234002) - DW 6-Oct-20 Zirconium-95 4.69E-01 2.72E+00 1.58E+00 pCi/L 281

DCL-21-022, 2020 Annual Radiological Environmental Operating Report

Contents

Text

Dear Commissioners and Staff:

SUMMARY

1.0 INTRODUCTION

2.3 DESCRIPTION

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

10.0 REFERENCES

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DCL-21-022, 2020 Annual Radiological Environmental Operating Report

Text

Dear Commissioners and Staff:

SUMMARY

1.0 INTRODUCTION

2.3 DESCRIPTION

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

10.0 REFERENCES

Navigation menu

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