GO2-24-049, 2023 Annual Radiological Environmental Operating Report

2023 Annual Radiological Environmental Operating Report

ML24134A205
Person / Time
Site:	Columbia
Issue date:	05/13/2024
From:	David Brown Energy Northwest
To:	Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation, Document Control Desk
References
GO2-24-049
Download: ML24134A205 (1)

Text

David P. Brown Columbia Generating Station P.O. Box 968, MD PE23 Richland, WA 99352-0968 Ph. 509.377.8385 dpbrown@energy-northwest.com 10 CFR 50.4 GO2-24-049 10 CFR 72.44(d)(3)

U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

COLUMBIA GENERATING STATION, DOCKET NO. 50-397 INDEPENDENT SPENT FUEL STORAGE INSTALLATION, DOCKET NO. 72-35 2023 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT

References:

1. Columbia Generating Station Technical Specification 5.6.1

2. Independent Spent Fuel Storage Installation Technical Specification 5.4.c

3. EFSEC Resolution No. 332, February 21, 2012

Dear Sir or Madam:

In accordance with the requirements of References 1-3, the subject report is submitted as an enclosure to this letter. This letter contains no regulatory commitments. If you have questions regarding this information, please contact Ms. Payton Sample at (509) 377-2469.

Executed on this ________ day of __________, 2024.

Respectfully, David P. Brown Site Vice President Enclosure - as stated cc:

NRC Region IV Administrator Director, SFPO-NRC NMSS NRC NRR Project Manager M. Priddy (WDOH)

NRC Sr. Resident Inspector (988C)

L. Albin (WDOH)

CD Sonoda - BPA/1399 P. Miller (WDFW)

J. Lippold (WDOE)

J. Temple (WDOE)

ESFEC




    







May 13, 2024 ENERGY NORTHWEST jnDocuSigned by:

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GO2-24-049 Enclosure Columbia Generating Station 2023 Annual Radiological Environmental Operating Report

COLUMBIAGENERATINGSTATION 2023 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ENERGY NORTHWEST

ENERGY NORTHWEST COLUMBIA GENERATING STATION RADIOLOGICAL ENVIRONMENT AL MONITORING PROGRAM 2023 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT Authored By :

For Calendar Year 2023 Preparation Date: April 2024 Submitted Date: May 2024 Amanda Pierson, ENW Environmental Services Reviewed By:

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Mario Farias, ENW Environmental Services Reviewed B :~

Kris Bye, ENW Environmental Services Date: 'i / ff /2JllJJt.

Approved-By: ~

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Date: 't'-1 o -2'1 Devon Van Alyne, ENW Laboratory Services Manager

TABLE OF CONTENTS 2023 Annual Radiological Environmental Operating Report i

Energy Northwest/Columbia Generating Station SECTION PAGE 1.0 EXECUTIVE

SUMMARY

1-1 2.0 DEFINITIONS 2-1

3.0 INTRODUCTION

3-1 3.1 Site Description 3-1 3.2 Program Background 3-1 3.3 Program Objectives 3-2 4.0 PROGRAM DESCRIPTION 4-1 4.1 Sample Locations 4-1 4.2 Independent Spent Fuel Storage Installation (ISFSI) 4-1 4.3 Land Use Census 4-2 4.4 Sampling Methods 4-2 4.4.1 Direct Radiation 4-2 4.4.2 Airborne - Particulate/Iodine 4-2 4.4.3 Water 4-3 4.4.4 Soil 4-4 4.4.5 Sediment 4-4 4.4.6 Fish 4-5 4.4.7 Milk 4-5 4.4.8 Garden Produce 4-5 4.5 Split Sample Program 4-6 4.6 Sample Analyses 4-6 4.6.1 Analysis of Dosimeters 4-6 4.6.2 Gross Beta Activity on Air Particulate Filters 4-6 4.6.3 Measurement of Gamma Emitting Radionuclides 4-7 4.6.4 Gross Alpha and Gross Beta Activity in Water 4-7 4.6.5 Tritium in Water 4-7 4.6.6 Low Level Radioiodine in Milk and Water 4-8

TABLE OF CONTENTS 2023 Annual Radiological Environmental Operating Report ii Energy Northwest/Columbia Generating Station SECTION PAGE 4.6.7 Carbon-14 4-8 4.6.8 Strontium-89/90, Iron-55, and Nickel-63 4-8 4.7 Data Analysis Methods 4-8 4.8 Changes to the Sampling Program in 2023 4-9 5.0 RESULTS AND DISCUSSION 5-1 5.1 Direct Radiation 5-1 5.2 Airborne Particulate/Iodine 5-4 5.3 Water 5-6 5.3.1 Surface Water 5-6 5.3.2 Ground Water 5-7 5.4 Soil 5-8 5.5 River Sediment 5-8 5.6 Fish 5-8 5.7 Milk 5-8 5.8 Garden Produce 5-9 5.9 Special Interest Stations 5-9 5.9.1 Evaporation Pond (Station 101B) 5-9 5.9.2 Sanitary Waste Treatment Facility (Station 102B) 5-10 5.9.3 Cooling System Sediment Disposal Area (Station 119) 5-10 5.9.4 Independent Spent Fuel Storage Installation 5-12 5.9.5 Miscellaneous Environmental Sample Results 5-13 5.10 2023 Sample Deviations 5-13

TABLE OF CONTENTS 2023 Annual Radiological Environmental Operating Report iii Energy Northwest/Columbia Generating Station SECTION PAGE 6.0 QUALITY ASSURANCE AND QUALITY CONTROL 6-1 6.1 Quality Control for the Energy Northwest Environmental Dosimeter Program 6-1 6.2 Quality Control for the Environmental Sample Program 6-1 6.2.1 Sample Collection Quality Control 6-1 6.2.2 Laboratory Instruments Quality Control 6-2 6.2.3 Sample Batch Quality Control 6-2 6.3 Laboratory Intercomparison Program Participation and Results 6-3 6.4 Laboratory Quality Control Program Problems and Improvements 6-3

7.0 REFERENCES

7-1 8.0 ERRATA 8-1 APPENDIX A. Data Tables A and B

2023 Annual Radiological Environmental Operating Report iv Energy Northwest/Columbia Generating Station LIST OF TABLES TABLE PAGE 4-1 Radiological Environmental Monitoring Program Sampling Plan 4-10 4-2 REMP Sample Stations and Requirements 4-17 4-3 2023 Five Mile Land Use Census Results 4-21 4-4 Comparison of Laboratory Nominal Lower Limits of Detection With 4-22 Offsite Dose Calculation Manual Requirements 5-1A ODCM REMP Sample Deviations for 2023 5-13 5-1B EFSEC REMP Sample Deviations for 2023 5-14 5-1C ODCM & EFSEC REMP Sample Deviations for 2023 5-14 5-1D CGS REMP Air Sample Percent in Service Time for 2023 5-15 5-1E CGS REMP Water Sample Percent in Service Time for 2023 5-15 5-2 Radiological Environmental Monitoring Program Summary 5-16 5-3 Quarterly Dosimeter Data Summary with Comparison to Preoperational 5-26 and Operational Periods 5-4 Cooling System Sediment Activity Levels for Disposals Made in 2023 5-11 6-1 2023 Environmental Spiked Dosimeter Results 6-4 6-2 ENW REMP Program Cross Check Performance Results 6-5

2023 Annual Radiological Environmental Operating Report v

Energy Northwest/Columbia Generating Station LIST OF FIGURES FIGURE PAGE 4-1 Select REMP Sampling Locations Within 0.8 Miles of CGS 4-23 4-2 Select REMP Sampling Locations Between 0.8 and 2.8 Miles 4-24 4-3 Select REMP Sampling Locations Beyond 2.8 Miles 4-25 4-4 ISFSI Dosimeter Station Layout 4-26 5-1 S Stations Quarterly TLDs 1984-2020 Hi/Low/Mean and 2023 Dosimeter 5-2 Mean by Sector 5-2 Near Plant Stations Quarterly TLDs 1984-2020 Hi/Low/Mean and 2023 5-3 Dosimeter Mean by Sector 5-3 Remote Stations Quarterly TLDs 1984-2020 Hi/Low/Mean and 2023 5-3 Dosimeter Mean by Sector 5-4 1985-2020 Weekly Hi/Low/Mean and 2023 Weekly Mean Gross Beta in Air-5-4 Near Plant Stations 5-5 1985-2020 Weekly Hi/Low/Mean and 2023 Weekly Mean Gross Beta in Air-5-5 Remote Stations 5-6 Gross Beta in River/Drinking (Stations 26 & 29) and Plant Discharge Water 5-6 (Station 27) for 2023 5-7 Tritium in River/Drinking (Stations 26 & 29) and Plant Discharge Water 5-7 (Station 27) for 2023 5-8 ISFSI Dosimeter Trend at CGS 5-12

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1.0 EXECUTIVE

SUMMARY

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2023 Annual Radiological Environmental Operating Report 1-1 Energy Northwest/Columbia Generating Station 1.0 EXECUTIVE

SUMMARY

The primary objective of the Energy Northwest Radiological Environmental Monitoring Program (REMP) is to assess the radiological impact that Columbia Generating Station (CGS) operation may have on the environment. Presented in this report are summaries and discussions of the data generated for the REMP at CGS for the period of January 1 through December 31, 2023. Sampling is performed as specified in the Offsite Dose Calculation Manual (ODCM) and agreements made with the State of Washington Energy Facility Site Evaluation Council (EFSEC). Additional sampling is also performed to meet Nuclear Energy Institute (NEI) guidelines or as an Energy Northwest initiative. The program serves to validate CGS effluent measurements and exposure pathway models and to provide a documented, historical record of CGS impact on the environment.

Various types of environmental samples are routinely collected and analyzed by the REMP. The types of samples collected include air, water, soil, sediment, milk, fish, and garden produce. Additionally, the program continuously monitors direct radiation at numerous locations surrounding CGS. Analysis results are trended and compared to results from control locations, results obtained in previous operational and pre-operational periods, and regulatory limits.

The results contained in this report show that all identified radiological impact to the environment attributable to CGS operation was limited to areas within the CGS controlled area. All routine sample results were consistent with the results obtained from control locations, results from the preoperational period, and historical results collected since CGS began commercial operation. All activity identified within the controlled area is attributed to rain-washout (recapture) of gaseous activity released from CGS via an approved and monitored effluent pathway. All radioactive material identified outside the CGS controlled area was of natural origin or known to be present in the environment around CGS in the quantities identified. No radioactive material related to CGS operation was identified beyond the CGS controlled area.

The results are consistent with and verify CGS effluent measurements and modeling of the exposure pathways. CGS has continued to monitor the environment by direct radiation, airborne, waterborne, and ingestion pathways. These four exposure pathways are summarized as follows:

Direct Radiation - The only increases during 2023 were at stations 129 ISFSI, 131 ISFSI, 137B ISFSI, 138B ISFSI. In 2021 optically stimulated luminescence (OSL) dosimeters were implemented. The method for evaluating and reporting the environmental direct radiation exposure was modified to reflect recommendations from ANSI/HPS N13.37-2014. The method of background subtraction used is what is recommended by ANSI/HPS N13.37-2014. The specifics of this background subtraction are described in Table 4 of ANSI/HPS N13.37-2014.

The average deviation relative to the pre-operational and operational period was higher since 2021 when compared to previous years. Industry operating experience has indicated that when switching to a new vendor processing system, higher readings for OSL dosimeters compared to previous TLDs is expected, and not due to plant related increases of radiation exposure in the environment. No impact was identified at locations beyond the CGS controlled area. Within the controlled area, the only impact identified was at locations known to be influenced by the Independent Spent Fuel Storage Installation (ISFSI) or radiation from the turbine building during operation.

2023 Annual Radiological Environmental Operating Report 1-2 Energy Northwest/Columbia Generating Station CGS continues to use the OSL dosimetry and 2023 showed consistent readings with 2022.

Airborne - No impact due to CGS operation was identified. No radioiodines or other radionuclides related to CGS operation were identified in any of the environmental air samples.

Waterborne - No impact was identified at surface/drinking water locations outside the CGS controlled area. Low level tritium activity was identified in storm drain water contained in evaporation ponds. The activity identified at these locations is due to recapture and concentration of CGS effluent activity; the activity levels observed are consistent with levels historically identified.

Tritium activity identified in groundwater samples was at levels historically observed and consistent with levels known to exist in Hanford groundwater. No evidence that CGS operation contributed to groundwater tritium levels was identified. Radionuclide activity identified in river sediment is consistent with activity levels known to exist in Hanford area sediment and soils.

Ingestion - No impact due to CGS operation was identified in any of the milk, fish, or food product sample results. Carbon-14 activities in local fruit samples were below the level of detection.

2.0 DEFINITIONS

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2023 Annual Radiological Environmental Operating Report 2-1 Energy Northwest/Columbia Generating Station 2.0 DEFINITIONS a priori: refers to a before the fact limit that represents the capabilities of a measurement system and not a limit for a particular measurement.

a posteriori: refers to an after the fact limit determined for a particular measurement and not a limit for a measurement system.

Airborne Activity Sampling: Continuous sampling of air through the collection of particulates and radionuclides on filter media. Periodic soil samples are collected for gamma isotopic analysis to provide information on deposition to the soil from airborne releases.

Alpha Particle (): A charged particle emitted from the nucleus of an atom having a mass and charge equal in magnitude of a helium nucleus.

Becquerel (Bq): One disintegration per second. One picocurie (pCi) equals 0.037 becquerel.

Beta Particle (): Charged particle emitted from the nucleus of an atom with a mass and charge equal in magnitude to that of an electron.

Blank Sample: A sample of the same media as the field sample being analyzed but without any radionuclide(s) being measured. It enables correction for the inherent sample background.

CBD: Circulating Water Blowdown.

CFM: Cubic Feet per Minute.

CFR: Code of Federal Regulations.

CGS: Columbia Generating Station, formerly referred to as WNP-2.

CGS Controlled Area: The area within a 1.2-mile radius of the CGS reactor building and a narrow corridor extending from CGS east to the Columbia River.

CGS Protected Area: The area within the security fence surrounding CGS. Access to this area requires a security badge or escort.

Composite Sample: A series of single collected portions (aliquots) analyzed as one sample. The aliquots making up the sample are collected at time intervals that are very short compared to the composite period.

Control Station: A sampling station in a location not likely to be affected by plant effluents due to its distance and/or direction from the Columbia Generating Station.

Counting Error: An estimate of the two-sigma uncertainty associated with the sample results based on respective count times.

ntTime)

BkgCPM/Cou

+

CountTime SampleCPM/

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2

/

+

CPM: Counts Per Minute.

Curie (Ci): A measure of radioactivity; equal to 3.7 x 1010 disintegrations per second, or 2.22 x 1012 disintegrations per minute.

CW: Circulating Water.

Direct Radiation Monitoring: The measurement of radiation dose at various distances from the plant is assessed using dosimeters and pressurized ionization chambers.

Dosimeter: A device used to measure the amount of exposure to radiation - OSL / TLD DOE: U.S. Department of Energy.

D/Q: Deposition values.

EFSEC: Energy Facility Site Evaluation Council.

ENW: Energy Northwest.

Flow Proportional Sampling: Sample collection volume or frequency determined as a function of the flow rate of the water being sampled.

Grab Sample: A single discrete sample drawn at one point in time.

IDC: Energy Northwest Industrial Development Complex, formerly referred to as the WNP-1 and WNP-4 sites.

Indicator Station: A sampling location that is likely to be affected by plant effluents due to its proximity and/or direction from the Columbia Generating Station.

Ingestion Pathway Monitoring: The ingestion pathway includes milk, fish, and garden produce. Also sampled (under special circumstances) are other media such as vegetation and animal products such as eggs and meat when additional information about particular radionuclides is needed.

ISFSI: Independent Spent Fuel Storage Installation.

Lower Limit of Detection (LLD): The smallest concentration of radioactive material in a sample that will yield a net count (above system background) that will be detected with 95% probability with a 5% probability of a

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2023 Annual Radiological Environmental Operating Report 2-2 Energy Northwest/Columbia Generating Station false conclusion that a blank observation represents "real" signal.

Mean: The average, i.e., the sum of results divided by the number of results.

Microcurie: 3.7 x 104 disintegrations per second, or 2.22 x106 disintegrations per minute.

Milliroentgen (mR): 1/1000 Roentgen; a unit of exposure to X or gamma radiation.

MDA: Minimum Detectable Activity.

MDC: Minimum Detectable Concentration.

NEI: Nuclear Energy Institute NIST: National Institute of Standards and Technology.

NPDES: National Pollutant Discharge Elimination System.

NRC: U.S. Nuclear Regulatory Commission.

ODCM: Offsite Dose Calculation Manual. Licensing document that contains the NRC mandated effluent and offsite radiological monitoring requirements.

Optically Stimulated Luminescence (OSL) Dosimeter:

A device used to measure the amount of exposure to radiation. A crystal phosphor that stores energy proportional to the amount of exposure; the exposure level is determined by light to release the stored energy and measure the dose of ionizing radiation received.

Picocurie (pCi): 1 x 10-12 Curie or one millionth of a microcurie. 1 picocurie equal 0.037 becquerel or 2.22 disintegrations per minute PWTF: Potable Water Treatment Facility identified as Building 195 - Water Treatment Facility.

Radioiodine: Radioisotopes of iodine. For commercial nuclear reactors, iodine-131 to iodine-135 are the principle radioiodines of concern. Due to its longer half-life, iodine-131 is the most probable radioiodine identifiable in the environment.

REMP: Radiological Environmental Monitoring Program.

Range: The difference between the smallest and largest results.

Restricted Area: Any area where access is controlled for the purpose of protecting individuals from exposure to radiation or radioactive materials.

Roentgen: Unit of exposure to ionizing radiation in air.

Site Certification Agreement (SCA): The initial Columbia Generating Station licensing agreement with the State of Washington. The REMP sampling commitments in the SCA have been modified by EFSEC agreements.

Spiked Sample: A sample that has had a known quantity of radionuclide(s) added for the purposes of assessing analytical performance.

Standard Deviation: A measure of the scatter of a set of observations (or samples) around their mean value.

Indicated by.

Standard Error of the Mean: An estimate of the uncertainty associated with the mean of observation (or sample) averages. Also known as the standard deviation.

n S

SE 2

=

where S2, the variance is

=

2 2

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(

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(

1 X

Xi n

S n

m SWTF: Sanitary Waste Treatment Facility. The sanitary waste processing facility for the Columbia Generating Station and other ENW facilities near the CGS site.

TEDA: triethylene diamine. A compound used in charcoal cartridge filters to collect radioiodine.

Thermoluminescent Dosimeter (TLD): A device used to measure the amount of exposure to radiation. A crystal phosphor that stores energy proportional to the amount of exposure; the exposure level is determined by heating the crystal and reading the amount of emitted light.

TMU: Tower Makeup.

WaDOH: Washington State Department of Health.

WSU: Washington State University.

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3.0 INTRODUCTION

2023 Annual Radiological Environmental Operating Report 3-1 Energy Northwest/Columbia Generating Station

3.0 INTRODUCTION

3.1 Site Description The Columbia Generating Station (CGS) is a 1230 MWe commercial nuclear power plant that achieved initial criticality on January 19, 1984. The plant is in a sparsely populated shrub-steppe region within the Department of Energy (DOE) Hanford Site in southeastern Washington. The plant is approximately three miles west of the Columbia River and is surrounded by uninhabited desert land. The nearest large population centers are Richland, Pasco, and Kennewick, which are 12 miles south, 18 miles southeast, and 21 miles southeast, respectively. The nearest privately owned lands are located approximately four miles east-northeast of the plant, across the Columbia River. The site has a bimodal wind pattern with winds primarily from the northwest and south. (1) The primary region of focus for Radiological Environmental Monitoring Program (REMP) sampling is the farming region east of the plant.

Naturally occurring radionuclides exist in detectable quantities throughout the world and are seen in many of the samples collected for the CGS REMP. Some examples of naturally occurring radionuclides that are frequently seen in samples are potassium-40, beryllium-7, actinium-228 (present as a decay product of radium-228), and radium-226. Additionally, some relatively long-lived anthropogenic radioisotopes, such as strontium-90 and cesium-137, are also seen in some REMP samples; these radionuclides exist in measurable quantities throughout the world as a result of fallout from atmospheric nuclear weapons testing. (2, 3)

Due to the location of CGS on the Hanford Site, there are other sources of reactor produced radionuclides near the plant. CGS is unique in the U.S. commercial nuclear power industry in this respect. Hanford-related radionuclides, most notably tritium, are identified in some CGS REMP samples.

Though the presence of these radionuclides in the vicinity of CGS are not necessarily reflective of CGS activity, changes in the levels of these radionuclides are monitored to assess any contribution that CGS may be making to the established background. The DOE has an active environmental monitoring program for the Hanford Site that overlaps the CGS REMP.

3.2 Program Background The CGS REMP is designed to conform to the Nuclear Regulatory Commission (NRC) Regulatory Guide 4.1, (4) US Nuclear Regulatory Commission Regulation (NUREG) 1302, (5) and the 1979 NRC Branch Technical Position. (6) In addition, the REMP also meets the requirements of 10 Code of Federal Regulations (CFR) 72.44(d)(2) (20) for coverage of the ISFSI.

The quality assurance aspects of the sampling program and the environmental dosimetry are conducted in accordance with Regulatory Guides 4.15(7) and 4.13.(8) The REMP also adheres to the requirements of the State of Washington Energy Facility Site Evaluation Council (EFSEC),(9) CGS Technical Specifications,(10) and the CGS Offsite Dose Calculation Manual (ODCM).(11) These requirements cover the environmental sampling and sample analysis aspects of the program, and also the reporting and quality assurance requirements.

The preoperational phase of the program, which lasted from March 1978 until initial criticality in January 1984, provided a baseline of background environmental data. Variability in the background

2023 Annual Radiological Environmental Operating Report 3-2 Energy Northwest/Columbia Generating Station levels of radioactivity over time is due to differences in geologic composition, meteorological conditions, decay of nuclear testing fallout material in the environment, and seasonal changes.

Variability in results may also have been introduced by changing analytical contractors and the use of different correction factors over the years.

In addition to evaluating environmental concentrations against regulatory limits, the REMP also compares some results to standards set by the State of Washington. (12, 13) Results may also be evaluated by comparing them to similar measurements made during the preoperational and previous operational periods and to the detection capabilities associated with the current methods of analysis.

3.3 Program Objectives The REMP provides an independent mechanism for determining the levels of radioactivity in the plant environs to empirically quantify and qualify any radiological effect plant operation may be making on the environment. The program serves to ensure that any accumulation of radionuclides in the environment resulting from station operation will be identified promptly and before they become significant or exceed established limits.

While in-plant monitoring programs are used to ensure that 10 CFR 20(14) and 10 CFR 50(15) criteria for releases of radioactive effluents are met, the REMP further verifies that the measured concentrations of radioactive material and levels of radiation observed in the environment are not higher than expected based on CGS effluent measurements and modeling of the exposure pathways.

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station 4.0 PROGRAM DESCRIPTION

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2023 Annual Radiological Environmental Operating Report 4-3 Energy Northwest/Columbia Generating Station 4.0 PROGRAM DESCRIPTION Environmental samples for the REMP are collected in accordance with the CGS ODCM. Additional sampling requirements are specified in Resolutions or Council Orders issued by the EFSEC. Some sampling is also performed as a CGS initiative in response to site specific or industry wide concerns. The sampling plan presented in Table 4-1 gives an overview of the REMP sampling routine, a summary of the sample locations, the specified collection frequency, and the types of analyses to be performed. The methods of sampling and sampling frequencies utilized in the program are mostly dictated by regulatory requirements. Factors such as nuclide half-lives and the major exposure pathways for the radionuclides potentially released from the plant have been considered in determining the sampling methodology.

4.1 Sample Locations One hundred and thirteen sampling locations (referred to as stations) were included in the monitoring program during 2023. More than one sample type may be collected at a sample station.

One hundred and three indicator and three control stations were located within a 10-mile radius of CGS. Seven additional stations were located beyond the ten-mile radius of the plant, three were indicator locations and four were control locations. Sample stations are listed in Tables 4-1 and 4-2.

Most station locations are shown in Figures 4-1 to 4-4.

The locations of most sample stations have been selected based on an exposure pathway analysis. The exposure pathway analysis was based on factors such as weather patterns, anticipated emissions, likely receptors, and land use in the surrounding areas. Samples collected from stations located in areas that potentially could be influenced by CGS operation are used as indicators. Samples collected from locations that are not likely to be influenced by CGS operation serve as controls. Results from indicator stations are compared to the results from control stations and results obtained during the previous operational and preoperational years of the program in order to assess the impact CGS operation may be having on the environment.

4.2 Independent Spent Fuel Storage Installation (ISFSI)

The Independent Spent Fuel Storage Installation (ISFSI) is a fenced, secured area constructed to provide a storage location for spent nuclear fuel. The spent fuel is stored in HI-STORM dry storage casks which are placed on concrete pads inside the facility. The pads are 30-feet wide by 147-feet long and each pad can hold up to 18 casks. The ISFSI is located approximately 500 meters north-northwest of the reactor building. Radiological exposure rates inside the ISFSI security fence line are elevated and access to the area requires radiological dosimetry and security notification. In addition to the dosimetry monitoring program, quarterly radiological surveys of the ISFSI are conducted by the CGS Radiation Protection Department.

Direct radiation monitoring of the ISFSI is performed using dosimeters placed at twelve locations on the second of three security fences that surround the facility. The dosimeters are exchanged quarterly. Two additional dosimeter locations, Station 121 located approximately 200 meters north of the turbine building and Station 122 located approximately 100 meters north of the ISFSI, were established prior to ISFSI operation to specifically monitor ISFSI direct radiation. In addition, two more dosimeter stations, Station 155 located WNW of the ISFSI and Station 156 located to the NW

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station of the ISFSI, were installed in order to further aid in monitoring ISFSI direct radiation. Figure 4-1 shows the ISFSI location in relation to CGS and the position of these additional dosimeter locations.

Figure 4-4 shows the location of the 12 dosimeter stations around the ISFSI second fence line. This arrangement of dosimeters in conjunction with the radiological surveys conducted by the CGS Radiation Protection Department serves as the radiological monitoring program for the ISFSI.

4.3 Land Use Census The Land Use Census conducted annually during the growing season encompasses the areas within a five-mile radius of CGS. The purpose of this census is to identify the locations of the nearest milk animal, the nearest residence, and the nearest garden greater than 500 ft2 producing broadleaf vegetation. This information is used to determine whether any site located during the census has a calculated dose or dose commitment greater than the sites currently monitored for the same exposure pathway. If a new location with a higher dose commitment was found, routine sampling of that dose pathway would be initiated at that new site. The results of the 2023 five-mile land use census are presented in Table 4-3.

4.4 Sampling Methods Environmental samples are collected by Energy Northwest personnel in accordance with the program plan outlined in Table 4-1. Methods of sample collection and dosimeter handling are specified in REMP specific procedures. A general overview of the sampling methods used in the REMP is given below. Generic descriptions of the REMP sample analysis methods are given in section 4.6.

4.4.1 Direct Radiation In 2023, direct radiation dose levels were monitored with the OSL dosimeters that come already prepared and sealed in a waterproof pouch. The dosimeters are placed in the field between three and five feet above the ground. Dosimeters are exchanged on a quarterly basis.

The locations of the dosimeter stations are listed in Table 4-2 and are shown in Figures 4-1 through 4-4. Station 9A near Sunnyside, WA serves as the environmental dosimeter control location. Station 119Cntl serves as the control for Station 119B (the cooling system sediment disposal cells). The remaining dosimeters deployed in the field serve as indicator dosimeters.

The dosimeters are arranged in a series of rings that encircle CGS. The innermost ring of dosimeter stations, referred to as the S stations, are located inside the CGS site boundary at distances that range from 0.3-0.8 miles from the reactor building centerline. The second ring of dosimeters, referred to as the near plant stations, are located at distances ranging from 0.9 to 2.1 miles from the reactor building. The outer ring of dosimeters are located at distances that range from a little under three miles to around ten miles. Direct radiation is also monitored by dosimeters at the ISFSI and at several miscellaneous locations at CGS initiative. A MicroRem dose rate meter is available as a backup device and to take real time readings as needed.

4.4.2 Airborne - Particulate/Iodine Weekly air particulate and radioiodine (iodine -131) samples are obtained using low volume (1.5 cfm), constant flow-rate sampling units located at 12 locations. The samples collected at Station 9A (Figure 4-3) serve as controls, the samples collected at all other locations (Figures 4-1, 4-2, and 4-3)

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station are indicators. Air particulate samples are collected at each location by using 47mm diameter glass fiber filters and air iodine samples are collected using Radeco CP-100 TEDA impregnated charcoal cartridges. The air particulate filter and charcoal cartridge are placed in tandem, particulate filter first, in a holder that attaches to the air inlet of the sampler unit. The sampler units are placed in ventilated metal weatherproof housings mounted on elevated platforms at each air sample location.

The filter media are changed weekly. Four additional air sample monitor locations are available to monitor work at the DOE 618-11 burial site if needed.

4.4.3 Water Water sampling is performed to meet ODCM and EFSEC requirements, to comply with NEI guidelines, or as a CGS initiative. REMP water sampling can be categorized as follows:

• Intake-River/Drinking Water; two locations (Stations 26 and 29)

• Plant Discharge Water; one location (Station 27)

• Deep Groundwater; three locations (Stations 31, 32, and 52)

• Storm Drain Water; one location (Station 101B) Combined influent to EVAP Ponds

• Sanitary Wastewater; one location (Station 102B)

• Shallow Groundwater; eight locations (MW-3, 5 and MW-9 through MW-14)

The sample at Station 26 is obtained using a composite sampler that draws water from the plant intake water system (TMU). The source of this water is the Columbia River. The station serves as a control location, as it is upstream of the plant discharge location, and as a drinking water location as drinking water for CGS comes from this source. Station 29 is a composite sampler located at the City of Richland Water Treatment Plant located 11 miles downstream of the plant discharge. Station 29 is an indicator station for both river and drinking water.

The ODCM requirement for a downstream water sample is conservatively met by Station 27, a composite sampler that collects water from the cooling tower discharge line just prior to final discharge into the Columbia River. This sample reflects the radioactivity present in the plant discharge prior to any river dilution, rather than the concentrations that would be found after dilution in the mixing zone. Composite samples from Stations 26, 27, and 29 are collected monthly and analyzed for gamma emitting radionuclides, gross beta, and tritium.

Three drinking water wells on Energy Northwest property are used to provide deep groundwater samples. These wells are greater than 400 feet deep and provide samples from the confined aquifer under CGS. Station 31 and 32 are deep wells at the IDC (ENW Industrial Development Complex) located 1.2 miles down gradient from CGS. Station 52 is a deep well located 0.1-mile north of the CGS reactor building. The IDC wells supply water for drinking and fire protection at the IDC site. Water from Station 52 can be used as a backup source for drinking water and fire protection. All these wells are considered indicator locations. Quarterly grab samples are collected from each well and analyzed for gamma emitting radionuclides and tritium.

The composite sampler at Station 101B collects samples of wastewater discharged to two evaporation ponds located on the CGS site. The water collected is storm drain, air wash, and non-radioactive system wastewater originating from within the CGS protected area.

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station Samples are collected monthly on a flow proportional basis and analyzed for gross beta, gamma emitting radionuclides, and tritium. Sampling and analysis requirements for Station 101B are given in EFSEC Resolution No. 332(9) and EFSEC Council Order 874. (23) Process wastewater originating outside of the CGS protected area is typically discharged to three additional evaporation ponds; the water discharged to these ponds is not sampled by the Station 101B composite sampler. Annual grab samples are collected from these three evaporation ponds and analyzed for gamma emitting radionuclides and tritium as specified by EFSEC Council Order 874. (23)

The Sanitary Waste Treatment Facility (SWTF) receives sanitary wastewater from CGS, the IDC, and the Kootenai Building. Discharge standards and monitoring requirements for the SWTF are established in EFSEC Resolution No. 300. (16) The Station 102B composite sampler collects a representative sample of water flowing into the head works at the SWTF. Monthly samples are collected and analyzed for gross alpha, gross beta, tritium, and gamma emitting radionuclides.

Routine quarterly grab samples are taken as part of the REMP from shallow ground water monitoring wells surrounding CGS. The monitoring well locations are shown in Figure 4-1. The shallow groundwater wells are all less than 100 feet deep and allow samples to be obtained from the unconfined aquifer under CGS. None of the wells are used for drinking water. Sampling from these locations is performed to meet NEI 07-07 guidelines (17) and requirements in the CGS NPDES permit.

4.4.4 Soil Annual soil samples are a requirement of EFSEC Resolution No. 332. (9) For 2023, four soil samples were collected from locations near CGS (Station 1, 7, 5 and 21B), and one sample from a control location near Sunnyside, WA (Station 9A). Each sample was collected from an area of approximately one square foot to a depth of approximately one inch. Approximately one to two kilograms of soil is collected from each location. Soil samples are analyzed for gamma activity on a dry weight basis.

4.4.5 Sediment River sediment samples are collected semiannually as required by the ODCM and EFSEC Resolution No. 332. (9) The upstream sediment sample location (Station 33) is approximately two miles upriver from the plant discharge. The downstream sample (Station 34) is collected approximately one mile downstream from the plant discharge. Each sample consists of approximately two kilograms of shallow surface sediment scooped from areas known to be underwater during high water periods and where the potential for sediment accumulation is likely.

Sediment samples are dried in an oven and then analyzed for gamma emitting radionuclides on a dry weight basis.

Cooling system sediment samples are collected and analyzed whenever cooling system sediment is added to the disposal cells (Station 119B, Figure 4-1). Disposal of cooling system sediment is made in accordance with EFSEC Resolution No. 299. (18) Pre-disposal samples are collected and analyzed prior to transfer to ensure the material will be within the limits specified in the EFSEC resolution.

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station Following transfer, the material is allowed to dry, and a post-disposal sample is collected and analyzed.

Sediment samples from the two evaporation ponds that receive wastewater originating from within the CGS protected area (ponds 3 and 4) are collected annually and analyzed for gamma emitting radionuclides. This sampling and analysis are performed to meet EFSEC Council Order 874(23) requirements. Sediment samples from the other three evaporation ponds may be collected as a CGS initiative as conditions allow.

4.4.6 Fish Annual fish sampling is usually performed in late summer or fall. Fish samples collected from the Columbia River (Station 30) serve as indicator samples, whereas fish collected on the Snake River (Station 38) serve as control samples. Only edible portions of the fish are used to prepare the samples for analysis. Fish samples are analyzed for gamma emitting radionuclides on a wet weight basis. Three species of fish are collected; an anadromous species (salmon or steelhead), and two other resident species generally considered edible or potentially edible (typically bass, whitefish, carp, walleye, perch, or sucker). The same species are collected at each location. Resident species have been collected using traditional hook and line fishing since 2012.

Anadromous species are obtained from local fish hatcheries through arrangements made with the State of Washington Department of Fish and Wildlife.

4.4.7 Milk Milk samples are collected semimonthly during the spring and summer months (April through September) when cows are more likely to be grazing or on fresh feed. During the fall and winter months, milk samples are collected monthly. Raw milk samples are collected within a few hours of milking and the samples are normally prepared and analyzed within four days. Milk samples are collected from both indicator and control locations. Station 36 in Franklin County serves as the primary indicator location and is the only known dairy within a ten-mile radius of CGS. Milk samples were not obtained from Station 36B because the owner had moved since 2020. Control milk samples (Station 9B) were collected from a dairy in the lower Yakima Valley near Prosser, WA.

4.4.8 Garden Produce Samples of local garden produce are collected during the growing season when the produce is readily available. Three types of garden produce are typically collected: root crops, fruits, and leafy vegetables. Control samples (Station 9C) are usually obtained from the lower Yakima Valley.

Indicator samples are collected from areas downstream of the CGS discharge where crops are irrigated with Columbia River water or from locations that potentially could be impacted by CGS gaseous emissions. The Riverview and Ringold areas of Pasco are the principal collection locations for fruit crop. Root crop is primarily collected from a garden located near WSU Tri-Cities SSE of CGS. Historically, root crops were obtained in the Riverview area of Pasco. Collection of leafy vegetables is primarily made from gardens and farms located east of CGS. Vegetation samples may also be collected from locations closer to CGS. Garden and vegetable samples are typically puréed in a food processor and then analyzed for gamma emitting radionuclides on a wet weight basis.

Only edible portions are used for analysis.

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station 4.5 Split Sample Program In addition to the sample analyses performed by the Energy Northwest Environmental Services laboratory, several of the samples collected are split and independently analyzed by the Washington State Department of Health (WaDOH). CGS REMP personnel typically collect these samples, ship a representative portion to the WaDOH laboratory, then separately analyze another portion of the sample. For media such as air particulates or dosimeters where sample splitting is not feasible, the WaDOH co-locates a dosimeter or air sampler at the sample location.

The following split samples are typically provided: Monthly surface water samples from three locations, annual ground water samples from three locations, weekly air iodine and particulate filters from two locations, bi-annual vegetable samples from one location, monthly indicator milk samples from one location, quarterly control milk samples from one location, annual resident fish from one location, annual soil samples from three locations, and annual sediment samples from two locations.

4.6 Sample Analyses General descriptions of the procedures used to analyze REMP samples are provided in the following sections. All REMP environmental dosimeters in 2023 were processed by Landauer. Carbon-14 analysis of apples was performed by the WaDOH in 2023. All other routine REMP samples were collected and analyzed by Energy Northwest Environmental Services. Samples are normally collected and analyzed within a short time period to ensure required detection sensitivities are met and to provide timely results. Sample count times are conservatively calculated to ensure required a priori LLDs are achieved. Table 4-4 lists the ODCM required LLDs and the nominal target LLD used in the Energy Northwest REMP program.

4.6.1 Analysis of Dosimeters REMP dosimeters are analyzed on a Inlight (OSL) reader. The reader is calibrated immediately prior to processing the environmental dosimeters. The reader is calibrated with dosimeters that have been given a known exposure from a cesium-137 source. Each group of environmental dosimeters is processed with blank dosimeters and spiked dosimeters that have been given a known exposure.

Exposure received by the field dosimeters during transport is monitored with a set of trip control dosimeters that accompany the field dosimeters to and from the field locations and while in storage.

Another set of dosimeters, the building controls, are used to determine the exposure of the dosimeters at the storage location. The dosimeter exposure during transport to and from the field was determined from the difference between the building control results and the trip control results.

4.6.2 Gross Beta Activity on Air Particulate Filters Air particulate filters are counted directly in a gas flow proportional counter after a delay of several days to allow for the decay of radon and its progeny. Samples were counted using a Protean WPC-9550 instrument which allows automated sample counting and simultaneous alpha/beta determination. If gross beta activity is identified significantly above the mean of the control, gamma isotopic analysis is performed on the individual samples.

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station 4.6.3 Measurement of Gamma Emitting Radionuclides Gamma isotopic analysis allows identification and quantification of gamma-emitting radionuclides that may be attributable to CGS effluents. Shielded, high purity germanium (HPGe) detectors are used to assay environmental samples for gamma emitting radionuclides. All samples are counted in standardized, calibrated geometries.

• Liquids - Measured aliquots of the liquid samples are poured into appropriately sized Marinelli beakers or plastic container. Sample results are corrected for decay during the collection period if applicable. Results are reported in pCi/liter.

• Solids - Soil, sludge, and sediment samples are dried and ground as needed. Foodstuff, biota (fish), and vegetation are chopped finely or pureed and then analyzed wet (no drying is done). For foodstuff (including fish), only the edible portion of the sample is used. Sample aliquots are placed in tared containers and weighed. Results are reported in pCi/kg.

• Charcoal Cartridges - Typically four charcoal cartridges are counted simultaneously using a cartridge holding jig that positions the cartridges in a standardized geometry to the side of the detector. Detector calibration files are maintained for both face count and side count positions. If radioiodines are identified in the assay of a group, each charcoal cartridge in the group is assayed separately. Results are corrected for decay during the sample collection period. Results are reported in pCi/m3.

• Air Particulate Filters - At the end of each quarter, air particulate filters are composited on a station-by-station basis. The filters are stacked in a petri dish and analyzed by gamma spectroscopy. Results are reported in pCi/m3 and represent the total quarterly gamma activity collected at each station. Results are decay corrected to the midpoint of the sample collection period. If a radionuclide related to CGS operation is positively identified, the filters are separated and counted individually.

4.6.4 Gross Alpha and Gross Beta Activity in Water A measured aliquot of each sample is evaporated to a small volume then quantitatively transferred to a ribbed, stainless steel planchet. Final evaporation is normally done under a heat lamp. Residue mass is determined by weighing the planchet before and after mounting the sample. The planchet is counted for gross alpha and beta activity using a Protean WPC-9550 automatic gas flow proportional counter which allows automated sample counting and simultaneous alpha/beta determination. Results are corrected for sample self-absorption using the sample residue mass values. Results are reported in pCi/liter.

4.6.5 Tritium in Water The sample is distilled, then 8.0mL of the distillate is mixed with 12.0mL of scintillation cocktail. The sample mixture is analyzed on a Packard Tri-Carb 2900TR automatic liquid scintillation counter. Results are reported in pCi/liter.

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station 4.6.6 Low Level Radioiodine in Milk and Water Four liters of sample are first equilibrated with stable iodide carrier. Anion exchange resin is then added and mixed for an adequate period to allow any iodine present in the sample to be captured by the resin. The resin is then isolated from the liquid sample and transferred to a small counting container. The radioiodine content is determined by gamma spectroscopy analysis. Results are reported in pCi/liter.

4.6.7 Carbon-14 Carbon-14 levels in the environment around CGS are evaluated by comparison of carbon-14 content in apples obtained from local orchards to apples obtained from control locations. The analysis method used involves sample oxidation, capture of the resulting carbon dioxide, then liquid scintillation counting. Final results are calculated on a wet weight basis. Sample analysis is performed by an outside laboratory.

4.6.8 Strontium-89/90, Iron-55, and Nickel-63 Strontium-89/90, iron-55, and nickel-63 are hard to detect analytes not routinely analyzed as part of the CGS REMP. When needed, these analyses are performed under contract by Teledyne-Brown Environmental Services Laboratory located in Knoxville, TN using the vendors standard analysis procedures.

4.7 Data Analysis Methods Counting results for low level samples are often within the counting error of the background determination; consequently, results for these samples can be positive or negative values. Though most REMP analytical results are below the detection limit, an actual calculated value has been reported. In some cases, the reported value is zero or a negative number. Reporting results in this manner is the preferred practice for low level environmental analyses as it gives an indication of positive or negative biases that may be present and prevents loss of individual results inherent in the use of "less than" (<) values. Also reported in most cases are the a posteriori MDA values. A nuclide is flagged as positively identified if its calculated value is greater than the MDA. A listing of the Energy Northwest nominal target LLDs (a priori) for each sample type is provided in Table 4-4; the ODCM required LLDs are also included for a comparison.

Data is trended following analysis for many of the sample types analyzed. For analyses such as gross beta on air particulate filters where results are normally above the detection limit, indicator results are plotted with the control results for better comparison. Analysis results that are normally below detection limits are plotted against historical data to monitor if trends may be evident.

Environmental dosimeter data is presented in both units of mR/day and mR/standard quarter.

Dosimeter results in mR/day are calculated by taking the total exposure (in mR) determined for each dosimeter, correcting for storage background and any transit (or trip) exposure received during distribution and retrieval, then dividing by the number of days the dosimeter was in the field. The mR/standard quarter values are calculated by multiplying the mR/day value by 91.25 days (365/4).

All dosimeter results are reported in units of exposure (Roentgen) and not in units of dose (Rem).

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station 4.8 Changes to the Sampling Program in 2023 There were no changes made to the sampling program in 2023.

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-12 Energy Northwest/Columbia Generating Station SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLES AND SAMPLE LOCATIONS(a)

SAMPLE COLLECTION FREQUENCY TYPE AND FREQUENCY OF ANALYSIS REQUIRED BY DIRECT RADIATION Dosimetry(b)

Thirty-four routine monitoring stations either with two or more dosimeters or with one instrument for measuring and recording dose rate continuously, placed as follows:

Quarterly.

Gamma dose quarterly.

An inner ring of stations, one in each meteorological sector in the general area of the Site Boundary (ST: 1, 2, 13-20, 22, 24, 25, 49-51).

ODCM 6.3.1-1 1 An outer ring of stations, one in each of the meteorological sectors of NE, ENE, E, ESE, SE in the six to ten km (3.73 to 6.21 miles) range from the site (ST: 46, 45, 43, 8, and 41), and one in each of the meteorological sectors of N, NNE, SSE, S, SSW in the nine to thirteen km (5.59 to 8.08 miles) range from the site (ST: 53, 54, 55, 6, and 56).

ODCM 6.3.1-1 1 The balance of the stations to be placed in special interest areas such as population centers, nearby residences, schools, and one or two areas to serve as control stations (ST:

4, 5, 7, 10, 40, 42, 44, and 9A).

ODCM 6.3.1-1 1 Additional monitoring stations for the Independent Spent Fuel Storage Installation (ISFSI). (ST: 121-131, 136B-138B).

ODCM 6.3.1-1 1 Dosimeter 9.6 miles SSE (ST-4) 6.5 miles SE (ST-40) 7.7 miles S (ST-6) 2.8 miles WNW (ST-7) 4.4 miles ESE (ST-8) 28 miles WSW(ST-9) 3.2 miles E (ST-10) 3.2 miles ENE (ST-11) 6.7 miles NNW (ST-12)

At least 1 Dosimeter within each 22 1/2° sector around CGS located between 0.9 and 2.2 miles of CGS. (ST: 1-3, 13-25, 47, and 49-51)

Continuous Exposure Quarterly Collection Exposure Rate (milliroentgen/period)

EFSEC 332 Dosimeter ISFSI 4 or more Dosimeter located on ISFSI security fence line. (ST: 124, 128, 129, 137B)

Continuous Exposure Quarterly Collection Exposure Rate (milliroentgen/period)

EFSEC 332

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLES AND SAMPLE LOCATIONS(a)

SAMPLE COLLECTION FREQUENCY TYPE AND FREQUENCY OF ANALYSIS REQUIRED BY Dosimeter 0.44 miles WSW (ST-58) 8.87 miles S (ST-65) 0.90 miles ESE (ST-150) 0.83 miles E (ST-151) 0.30 miles NW (ST-155) 0.33 miles NNW (ST-156)

Continuous Exposure Quarterly Collection Exposure Rate (milliroentgen/period)

OTHER-Special study stations 0.17 miles WNW (ST-88) 0.23 miles WSW (ST-89)

CGS initiative 0.28 miles SSE (ST-119C) 0.31 miles S (ST-119B)

EFSEC 299 AIRBORNE Particulates and Radioiodine Samples from six locations:

Continuous sampler operation with sample collection weekly, or more frequently if required by dust loading.

Radioiodine Canister:

I-131 analysis weekly.

Particulate Sampler:

Gross beta radioactivity analysis following filter change, (c)

Gamma isotopic analysis (d) of composite (by location) quarterly.

One sample from close to the Site Boundary location, having a high calculated annual average ground-level D/Q. (ST-57)

ODCM 6.3.1-1 2 Three samples from close to the three Columbia River locations having the highest calculated D/Q. (ST: 8, 40, and 48)

ODCM 6.3.1-1 2 One sample from the vicinity of a community having the highest calculated annual average ground level D/Q. (ST-4)

ODCM 6.3.1-1 2 One sample from a control location, greater than 30 km (18.64 mi) from Columbia Generating Station (CGS) and in a sector not likely to be influenced by CGS. (ST-9)

ODCM 6.3.1-1 2 Particulates and Radioiodine 1.3 miles S (ST-1) 3.0 miles ESE (ST-23) 4.6 miles NE ( ST-48) 9.6 miles SSE ( ST-4) 6.5 miles SE ( ST-40) 7.7 miles S (ST-6) 2.8 miles WNW (ST-7) 4.4 miles ESE (ST-8) 28 miles WSW (ST-9)

Continuous Sampling Weekly Collection Radioiodine analysis (I-131) Weekly Particulate Gross Beta analysis weekly Particulate gamma isotopic of quarterly composite (by location)

EFSEC 332

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLES AND SAMPLE LOCATIONS(a)

SAMPLE COLLECTION FREQUENCY TYPE AND FREQUENCY OF ANALYSIS REQUIRED BY Particulates and Radioiodine 7.72 miles ESE (ST-5) 1.1 miles ESE (ST-21B)

Continuous Sampling Weekly Collection Radioiodine analysis (I-131) Weekly Particulate Gross Beta analysis weekly Particulate gamma isotopic of quarterly composite (by location)

CGS Initiative WATERBORNE

a. Surface (e)

One sample upstream (ST-26)

One sample downstream (ST-29)

Composite sample over one month period. (f)

Gamma isotopic analysis (d) monthly. Composite for tritium analysis quarterly.

ODCM 6.3.1-1 3a

b. Ground Samples from one or two sources only if likely to be affected. (g) (ST-31 and ST-52)

Grab sample performed quarterly Gamma isotopic(d) and tritium analysis quarterly.

ODCM 6.3.1-1 3b

c. Drinking One sample of each of one to three of the nearest water supplies that could be affected by its discharge. (ST-27)

One sample from a control location. (ST-26)

Composite sample over two-week period (f) when I-131 analysis is performed; monthly composite otherwise.

I-131 analysis on each composite when the dose calculated for the consumption of the water is greater than one mrem per year. (h)

Composite for gross beta and gamma isotopic analysis (d) monthly.

Composite for tritium analysis quarterly.

ODCM 6.3.1-1 3c Sanitary Waste Treatment Facility Water ST-102B Composite Aliquots.

Monthly collection.

Monthly gamma isotopic, gross beta, gross alpha, and tritium.

EFSEC 300 Ground Water ST-32 Grab sample performed quarterly Quarterly gamma isotopic and tritium.

OTHER-Special study stations Ground Water Monitoring MW-3, 5, 6, 9-14 Grab sample performed quarterly Quarterly gamma isotopic and tritium.

NEI 07-07 and NPDES Evaporation Pond Water EVP-1A, 1B, 2 from individual ponds Grab sample performed annually Annual gamma isotopic and tritium EFSEC 874 Evaporation Pond Water EVP-3, 4 from individual ponds Grab sample performed annually Annual gamma isotopic and tritium CGS Initiative River Intake, Plant Discharge, Storm Drain, and Drinking Water 3.2 miles E (ST-26) 3.2 miles E (ST-27) 0.2 miles ENE (ST-101B) Combined influent to EVAP ponds 11.6 miles SSE (ST-29)

Composite Aliquots Monthly Collection Gamma Isotopic, Gross Beta, and Tritium on all samples.

Sr-90 on drinking water as needed (see note)

EFSEC 332

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLES AND SAMPLE LOCATIONS(a)

SAMPLE COLLECTION FREQUENCY TYPE AND FREQUENCY OF ANALYSIS REQUIRED BY A representative sample will be collected using automatic composite sampling equipment that collects samples on a flow proportional or a set timed interval.

When timed interval sampling is used, the sample collection frequency is short (e.g., hourly) relative to the compositing period (e.g., monthly). Flow proportional sampling is preferred.

If the gross beta activity in a drinking water sample is greater than 8 pCi/l, strontium-90 analysis will be performed. This requirement does not pertain to river intake, storm drain, or plant discharge water.

Storm Drain 0.2 miles ENE (ST-101B) (Evaporation ponds composite sample station)

Composite Aliquots Monthly Collection Gamma Isotopic, Gross Beta, and Tritium on all samples.

EFSEC 874 Ground Water 0.1 miles N (ST-52)

From two shallow groundwater well locations.

Quarterly Grab Samples Gamma Isotopic and Tritium.

EFSEC 332 Shallow groundwater sampling locations include MW-3,5,6,7,8,9,10,11,12,13,14.

SOIL AND SEDIMENT

d. Sediment from shoreline One sample from downstream area with existing or potential recreational value. (ST-

34)

Semiannually.

Gamma isotopic analysis (d) semiannually.

ODCM 6.3.1-1 3d Evaporation Pond Sediment EVP-3, 4 Grab sample performed annually Annual gamma isotopic.

EFSEC 874 Cooling System Sediment Disposal Area ST-119B Grab sample of dried sediment within 30 days of disposal date.

Gamma Isotopic. After disposal.

EFSEC 299 River Sediment

~2.0 miles upstream (ST-33)

~1.0 miles downstream (ST-34)

Annual Grab sample Gamma Isotopic EFSEC 332 Sample should consist of shoreline sediment and not deep-water sediment. Samples should be taken from areas known to be underwater during high water periods and where the potential for river silt or sediment accumulation is likely.

Soil Two samples from locations near CGS historically sampled, two samples from locations in Franklin County, one sample from control location.

Annual Grab Sample Gamma Isotopic Sr-90 as needed (see note)

EFSEC 332 Locations near CGS historically sampled include air sample stations 1, 5, 21, 7, and 23. Samples should be alternated so that these locations are sampled bi-annually. Samples from Franklin County should be from agricultural areas that may be impacted by CGS operation. Control is ST-9, 28 miles WSW of CGS.

Individual soil samples will be analyzed for strontium-90 if gamma results indicate the presence of radionuclides attributable to CGS operation at levels that are greater than 5 times the historic trend and greater than 5 times the analysis LLD.

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLES AND SAMPLE LOCATIONS(a)

SAMPLE COLLECTION FREQUENCY TYPE AND FREQUENCY OF ANALYSIS REQUIRED BY INGESTION

a. Milk Samples from milking animals from at least one location within 10 miles distance having the highest dose potential, if available. (h) (ST-

36)

Samples from location within 10 miles distance where milking animals are known to be on pasture. If unavailable, collect an additional sample from the location with the highest dose potential, if available. (h) (ST-36B)

Sample from milking animals at a control location greater than 30 km (18.6 miles) and in a sector not likely to be influenced by CGS. (l)

(ST-9B)

Monthly in the first half of the month.

Monthly during the grazing season, in the second half of the month.

Monthly Gamma isotopic (d) (k),

Iodine-131 analysis monthly ODCM 6.3.1-1 4a Milk Milk from at least 1 Dairy within 10 miles of CGS. (ST-36) (see note)

Milk control from Dairy > 20 miles from CGS and in sector not likely to be affected by CGS operation. (ST-9B)

Semi monthly when milk animals are on pasture, monthly at other times.

Gamma Isotopic and I-131 analysis on all samples collected.

Sr-90 if Cs-134/137 identified in excess of 30 pCi/l EFSEC 332 Samples are obtained from at least one milk producer located within ten miles of CGS, if available. If more than one producer is available, collection from more than one location should be made. If multiple locations (GT 2) are available, the 2 locations with the highest dose potential should be sampled.

If no milk producers within 10 miles are available, samples of broadleaf vegetation or feed grown near 2 offsite locations with higher predicted ground level D/Q values may be sampled monthly during the growing season in lieu of milk sampling.

b. Fish and Invertebrates One sample of each of three recreationally important species (one anadromous and two resident) in vicinity of plant discharge area.

(ST-30)

One sample of same species in areas not influenced by plant discharge. (ST-38)

Sample annually, unless an impact is indicated, then semiannually. (i)

Gamma isotopic analysis (d) on edible portions.

ODCM 6.3.1-1 4b Fish One sample from 3 species (one anadromous and two resident) in the vicinity of the plant discharge area. (ST-30)

One sample from the same or similar species from areas not influenced by plant discharge.

(ST-38)

Annually, unless an impact is indicated, then semiannually Gamma Isotopic on edible portions.

EFSEC 332 If any of the analytical results of the Columbia River fish samples are significantly higher than the results of the control samples or results from previous years, sampling is to be conducted semiannually.

Anadromous species may be collected at local hatcheries. Fish species with recreational value should preferentially be collected if available.

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLES AND SAMPLE LOCATIONS(a)

SAMPLE COLLECTION FREQUENCY TYPE AND FREQUENCY OF ANALYSIS REQUIRED BY

c. Food Products 1 sample of each principal class of food products from any area that is irrigated by water in which liquid plant wastes have been discharged. (ST-9C, 37, 48G, 104, 37B)

At time of harvest. (j)

Gamma isotopic analysis (d) on edible portions.

ODCM 6.3.1-1 4c Fruits and Vegetables Samples of fruits and vegetables grown for human consumption from locations using Columbia River water obtained downstream of CGS discharge or from locations potentially impacted by CGS gaseous emissions. (ST-37, 37B)

Samples of fruits and vegetables from control locations. (ST-9C)

During growing season, at time of availability.

Annual control collection Gamma Isotopic on edible portions.

EFSEC 332 Samples should be obtained from farms or gardens in close proximity to CGS. Sample of root crops, leafy vegetables, and fruits should be collected as they are in season; different varieties should be obtained. For locations where the predominate pathway is gaseous, leafy vegetables are the preferred sample media. For locations where the predominate pathway is liquid, root crops are the preferred sample media. Vegetation samples taken from locations within 2 miles of CGS may be taken in place of leafy vegetables.

One control root crop, leafy vegetable, and fruit sample should be collected each year.

Table 4-1 Footnotes for ODCM requirements:

(a) Specific parameters of distance and direction sector relative to the reactor are provided for each sample location from ODCM Table 5-1. Refer to Radiological Assessment Branch Technical Position, Revision 1, November 1979. Deviations are permitted from the required sampling schedule if specimens are unobtainable due to circumstances such as hazardous conditions, seasonal unavailability, and malfunction of automatic sampling equipment.

When sample media is unobtainable due to equipment malfunction, corrective actions should be taken to ensure equipment is returned to functional status prior to the end of the next sampling period. In some cases, alternate sample collection may be substituted for the missing specimen.

(b) One or more instruments, such as a pressurized ion chamber, for measuring and recording dose rate continuously may be used in place of, or in addition to, integrating dosimeters. For the purposes of this table, dosimetry includes either thermoluminescent dosimeter (TLD) is one phosphor card with multiple readout areas; or Optically Stimulated Luminescence (OSL) Dosimeter which is a crystal phosphor that stores energy proportional to the amount of exposure; the exposure level is determined by light to release the stored energy and measure the dose of ionizing radiation received a phosphor card or crystal in a packet is equivalent to two or more dosimeters. Film badges shall not be used as dosimeters for measuring direct radiation. (The number of direct radiation monitoring stations may be reduced according to geographical limitations. The frequency of analysis or readout for OSL / TLD systems will depend upon the characteristics of the specific system used and should be selected to obtain optimum dose information with minimal fading.)

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN 2023 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station (c) Airborne particulate sample filters shall be analyzed for gross beta radioactivity 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or more after sampling to allow for radon and thorium 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.

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

(e) The "upstream sample" shall be taken from the Tower Makeup (TMU) intake line. The "downstream" sample shall be taken from the Circulating Water Blowdown (CBD) discharge line.

(f) A composite sample is one in which the quantity (aliquot) of liquid is proportional to the quantity of flowing liquid and in which the method of sampling employed results in a specimen that is representative of the liquid flow. In this program composite sample aliquots shall be collected at time intervals that are very short (e.g., hourly) relative to the compositing period (e.g., monthly) in order to assure obtaining a representative sample.

(g) Groundwater samples shall be taken when this source is tapped for drinking or irrigation purposes in areas where the hydraulic gradient or recharge properties are suitable for contamination.

(h for Waterborne c. Drinking) The dose shall be calculated for the maximum organ and age group, using the methodology and parameters in the ODCM.

(h) If no milk producers within 10 miles are available, samples of three types of broad leaf vegetation or feed grown near 2 offsite locations with higher predicted ground level D/Q values may be sampled monthly during the growing season in lieu of milk sampling.

(i) If any of the analytical results for Columbia River fish samples are significantly higher than the results of the control location samples or the results of previous fish samples, sampling will be conducted semiannually.

(j) If harvest occurs more than once a year, sampling shall be performed during each discrete harvest. If harvest occurs continuously, sampling shall be monthly. Attention shall be paid to including samples of tuberous and root food products.

(k) If Cs-134 or Cs-137 is measured in an individual milk sample in excess of 30 pCi/L, then Sr-90 analysis shall be performed.

(l) If no milk producers within 10 miles are available and sampling per footnote (h) is performed, obtain samples of similar broadleaf vegetation or feed grown at locations greater than 30 km from CGS and in sectors not likely to be influenced by CGS monthly in lieu of control milk sampling.

TABLE 4-2 REMP SAMPLE STATIONS AND REQUIREMENTS 2023 Annual Radiological Environmental Operating Report 4-22 Energy Northwest/Columbia Generating Station SECTOR(a)

STATION NUMBER(b)

DISTANCE MILES(c)

ODCM(d)

STATE(e)

OTHER(f)

N (1) 52 0.07 DGW DGW 71(1S) 0.28 Dosimeter 47 0.70 Dosimeter 57 0.70 AP/AI 18 1.16 Dosimeter Dosimeter 53 7.54 Dosimeter NNE (2) 72(2S) 0.32 Dosimeter 2

1.45 Dosimeter Dosimeter 54 6.08 Dosimeter EVP-1A 0.31 Dis W NE (3) 73(3S) 0.54 Dosimeter 19 1.74 Dosimeter Dosimeter 48 4.59 AP/AI AP/AI, SO 48G(k) 4.63 GP 46 4.99 Dosimeter MW-9 0.22 SGW SGW EVP-1B 0.25 Dis W EVP-2 0.35 Dis W EVP-3 0.43 SE ENE (4) 74(4S) 0.38 Dosimeter 21 1.45 Dosimeter, SO 20 1.93 Dosimeter Dosimeter 11 3.16 Dosimeter 33 3.44 SE 45 4.45 Dosimeter 44 5.90 Dosimeter 101B 0.22 Dis W MW-11 0.10 SGW SGW EVP-4 0.60 SE E (5) 75(5S) 0.37 Dosimeter 22 2.08 Dosimeter 10 3.16 Dosimeter Dosimeter 26 3.19 SW, DW SW 27 3.19 SW Dis W 30(g) 3.5 FI FI 43 5.63 Dosimeter 104(k) 5.08 GP 151 (Site 4) 0.83 Dosimeter MW-12 0.12 SGW SGW

TABLE 4-2 REMP SAMPLE STATIONS AND REQUIREMENTS 2023 Annual Radiological Environmental Operating Report 4-22 Energy Northwest/Columbia Generating Station SECTOR(a)

STATION NUMBER(b)

DISTANCE MILES(c)

ODCM(d)

STATE(e)

OTHER(f)

ESE (6) 76(6S) 0.42 Dosimeter 31 1.06 DGW 32 1.27 DGW 51 2.14 Dosimeter 34 3.32 SE SE 23 3.03 Dosimeter, AP/AI, SO 8

4.39 Dosimeter, AP/AI Dosimeter AP/AI, SO 42 5.85 Dosimeter 36 7.33 MI MI 36B(n) 6.2 MI MI 5

7.72 Dosimeter SO AP/AI 38(g) 26 FI FI 21B 1.1 AP/AI 150 (Site 1) 0.90 Dosimeter SE (7) 77(7S) 0.57 Dosimeter 24 1.87 Dosimeter Dosimeter 3

2.06 Dosimeter 41 5.79 Dosimeter 40 6.51 Dosimeter, AP/AI AP/AI MW-14 0.58 SGW SGW SSE (8) 119C 0.28 Dosimeter 102B 0.50 SFW 78(8S) 0.81 Dosimeter 25 1.50 Dosimeter Dosimeter 55 6.05 Dosimeter 4

9.57 Dosimeter, AP/AI Dosimeter, AP/AI 29 11.57 DW DW 37(h) 16 GP GP, SO 37B(h) 10.1 GP GP MW-13 0.52 SGW SGW S (9) 119B 0.31 Dosimeter, SE 79(9S) 0.76 Dosimeter 1

1.25 Dosimeter Dosimeter, AP/AI, SO 6

7.72 Dosimeter Dosimeter, AP/AI 65 8.87 Dosimeter SSW (10) 80(10S) 0.83 Dosimeter 50 1.26 Dosimeter Dosimeter 56 6.65 Dosimeter MW-3 0.31 SGW SGW SW (11) 81(11S) 0.74 Dosimeter

TABLE 4-2 REMP SAMPLE STATIONS AND REQUIREMENTS 2023 Annual Radiological Environmental Operating Report 4-22 Energy Northwest/Columbia Generating Station SECTOR(a)

STATION NUMBER(b)

DISTANCE MILES(c)

ODCM(d)

STATE(e)

OTHER(f)

MW-5 0.43 SGW SGW 13 1.26 Dosimeter Dosimeter 9B 23.2 MI MI WSW (12) 82(12S) 0.57 Dosimeter 14 1.26 Dosimeter Dosimeter 9A 28.35 Dosimeter, AP/AI Dosimeter, AP/AI, SO 9C(i) 32 GP GP 89(j) 0.23 Dosimeter 58 0.44 Dosimeter W (13) 83(13S) 0.52 Dosimeter 15 1.24 Dosimeter Dosimeter WNW (14) 84(14S) 0.55 Dosimeter 16 1.21 Dosimeter Dosimeter 7

2.83 Dosimeter Dosimeter, AP/AI, SO 88(j) 0.17 Dosimeter MW-10 0.07 SGW SGW NW (15) 85 (15S) 0.43 Dosimeter 130 0.24 Dosimeter 49 1.19 Dosimeter Dosimeter 155 0.30 Dosimeter NNW (16) 121 0.12 Dosimeter 122 0.31 Dosimeter 123 0.29 Dosimeter 124(m) 0.28 Dosimeter Dosimeter 125 0.28 Dosimeter 126 0.28 Dosimeter 127 0.26 Dosimeter 128(m) 0.25 Dosimeter Dosimeter 129(m) 0.17 Dosimeter Dosimeter 131 0.21 Dosimeter 136B 0.29 Dosimeter 137B(m) 0.24 Dosimeter Dosimeter 138B 0.17 Dosimeter 86 (16S) 0.31 Dosimeter 17 1.19 Dosimeter Dosimeter 12 6.74 Dosimeter 156 0.33 Dosimeter

2023 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station TABLE 4-2 SAMPLE TYPE KEY AP/AI - Air Particulate/Air Iodine Dis W - Discharge Water GP - Garden/Orchard Produce MI - Milk SFW - Sanitation Facility Water SW - Surface Water DW - Drinking Water FI - Fish DGW - Deep Ground Water SE - Sediment SO - Soil VE - Vegetation SGW - Shallow Ground Water Dosimeter-OSL / TLD - Optically Stimulated Luminescence / Thermoluminescent Dosimeter TABLE 4-2 FOOTNOTES:

(a)

The area in the vicinity of CGS is separated into 16 sectors for reporting purposes. The 16 sectors cover 360 degrees in equal 22.5-degree sections, beginning with sector 1 (N) at 348.75 to 11.25 degrees and continuing clockwise through sector 16 (NNW).

(b)

Alternate designations for some sample stations are given in parentheses, i.e., Dosimeter / OSL Stations 71-86 are also referred to as 1S-16S.

(c)

Distance and sector indications are relative to the center of the CGS reactor building and were determined using GPS coordinate readings. Distance and sector indication for the Evaporation Ponds is to the center of each pond.

(d)

ODCM - Offsite Dose Calculation Manual Table 6.3.1-1 requirement.

(e)

STATE - EFSEC requirement. Station 102B is an EFSEC Resolution 300 requirement. Stations 119B and 119C are EFSEC Resolution 299 requirements. Sampling at Evaporation Ponds 1A, 1B, 2, 3, and 4 is specified in EFSEC Council Order 874. All other State required samples are specified in EFSEC Resolution 332. Only five of the nine listed soil stations are sampled each year.

(f)

OTHER -Special study stations. Dosimeter Stations 121 through 131 and 136B through 138B satisfy ISFSI monitoring requirements 10CFR72.44(d)(2). Sampling at MW locations is performed to meet NEI 07-07 guidelines and NPDES requirements. Station 32 is a CGS initiative.

(g)

Station 30 is the Columbia River at the vicinity of the plant discharge. Actual distance of fish collection locations from plant are variable, distance listed is approximation. Station 38 is the Snake River. Control resident fish are typically collected at variable locations in area below Ice Harbor Dam, distance listed is approximation. Control anadromous fish are typically collected at Lyons Ferry Fish Hatchery.

(h)

Fruit and Vegetable indicator samples are typically collected from farms and gardens in the Riverview area of Pasco. Distance listed here is general distance of Riverview area to CGS. Station 37 designation is also used for any samples collected in Franklin County that could potentially be affected by CGS liquid or gaseous effluents. Station 37B is the designation given for a garden located at the Washington State University branch campus in Richland, WA.

(i)

Station 9C is the designation given for control fruits and vegetables. Distance listed is general distance to the Sunnyside-Grandview area where most of the control fruits and vegetables are obtained.

(j)

Stations 88-89 were installed at CGS initiative to monitor remediation work at the DOE 618-11 burial ground. No remediation work was performed at the burial ground in 2023. Quarterly dosimeters were deployed at both stations in 2023. No air samples were collected from any of these locations in 2023.

(k)

Station 48G is listed in ODCM table 5-1 as an alternate (garden produce) location for atmospheric deposition. This location consists of a small garden near the Ringold Fish Hatchery. Station 104, though outside the 5-mile radius of CGS, is the garden location with the highest projected dose commitment. CGS obtained a broad leaf vegetable sample from station 48G in 2023.

(l)

MW-3, 5, 9-14 are all listed as State required shallow groundwater monitoring stations. Actual EFSEC 332 requirement is to obtain 2 shallow ground water samples quarterly from any of these locations.

(m) Stations 124, 128, 129 and 137 are ISFSI Dosimeter stations listed as state requirements. Actual EFSEC 332 requirement is to have 4 or more Dosimeters located on the ISFSI security fence. Any 4 of the 12 Dosimeter stations CGS has established on the ISFSI fence line can satisfy this requirement.

(n)

Station 36B is the designation given for second monthly indicator milk sample from a location where the milking animal was known to have been on pasture, if available.

TABLE 4-3 2023 FIVE MILE LAND USE CENSUS RESULTS 2023 Annual Radiological Environmental Operating Report 4-12 Energy Northwest/Columbia Generating Station SECTOR(a)

NEAREST RESIDENT(b)

GARDEN(d)

(>500 ft2)

DAIRY ANIMALS(e)

LIVESTOCK(b,c)

NE 4.50 none none 4.50 ENE 3.88 none none 4.91 E

4.53 none none 4.64 ESE 4.26 none 6.17 6.17 SE none none none none FOOTNOTES (a)

Within a five-mile radius of the plant, only the five sectors listed above contain activities related to land use census requirements. The other eleven sectors lay fully within the federally owned Hanford Site. Only those sectors containing potential land use census activities are presented here.

(b)

Estimated distances in miles from CGS Reactor Building based on GPS readings.

(c)

Observed no cows on pasture in the ENE sector, however, there were 3 horses by the residence. The western edge of the pasture is just within the 5-mile radius of CGS. Additional feed appears to be provided at this location. Five horses were observed at a residence in the E sector, there is little pasture at this location and the horses appear to be fed mostly hay. Ten chickens and eight ducks were observed in NE sector, there is no pasture at this location.

(d)

No gardens >500 ft2 were identified in 2023, commercial agriculture is extensively practiced in some parts of the sectors listed in Table 4-3. Agricultural activities observed were primarily apple and soft fruit orchards, corn, alfalfa, and grape vineyards.

(e) 40 head of goats and 4 cows were identified on pasture in the ESE sector. This location is outside the 5-mile radius of CGS but was included given dose projections indicated higher deposition potential at this location than at any other dairy identified. Goat milk sample was attempted several times from this location in 2023 but was not successful.

TABLE 4-4 COMPARISON OF LABORATORY NOMINAL LOWER LIMITS OF DETECTION WITH OFFSITE DOSE CALCULATION MANUAL REQUIREMENTS 2023 Annual Radiological Environmental Operating Report 4-13 Energy Northwest/Columbia Generating Station MEDIA (UNITS)

ANALYSIS ENERGY NORTHWEST LLDs(a)

ODCM REQUIRED LLDs Air (pCi/m3)

Gross Beta Cs-134 Cs-137 I-131 0.002 0.001 0.001 0.03 0.01 0.05 0.06 0.07 Water:

(pCi/liter)

Gross Beta Tritium Sr-90 Ni-63 Fe-55 I-131(c)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 2.4 300 1

5 200 1

7 10 7

7 10 7

7 7

10 4

2000(b) 15 30 15 15 30 15 15 18 15 Soil/Sediment:

(pCi/kg dry)

Mn-54 Co-60 Zn-65 Cs-134 Cs-137 Sr-90 20 20 30 20 20 10 150 180 Fish:

(pCi/kg wet)

Mn-54 Fe-59 Co-58 Co-60 Zn-65 Cs-134 Cs-137 25 100 35 25 50 30 25 130 260 130 130 260 130 150 Milk:

(pCi/liter)

I-31(c)

Cs-134 Cs-137 Ba-La-140 Sr-90 0.5 8

8 10 1

1 15 18 15 Garden Produce:

(pCi/kg wet)

Cs-134 Cs-137 I-131 20 20 20 60 80 60 (a) These are the nominal target LLDs (a priori) for analyses performed in the Energy Northwest Environmental Services Laboratory and are based on conservative assumptions. These calculations included corrections for decay during the collection period and delay prior to analysis using factors that are normally encountered for the different media types. Actual LLDs (a posteriori) may be higher or lower for specific samples.

(b) If no drinking water pathway exists, a value of 3,000 pCi/liter may be used.

(c) This ENW Iodine-131 LLD achieved by anion resin separation and does not represent a direct analysis of the sample

2023 Annual Radiological Environmental Operating Report 4-14 Energy Northwest/Columbia Generating Station FIGURE 4-1 SELECT REMP SAMPLING LOCATIONS WITHIN 0.8 MILES OF CGS 0

A 84 Miles ISFSI Dosimete rs on perimeter fence 123 to 131 &

136B to 138B A

80

=

Water Sample A

Dosimeter Ai r Sample Deep Well Sha llow Well Cl c::,[]

0 o = ooe:i O cO A

A 11 9 W 3 11 9B Standby Se Nice Water c=J Security Barrier 1111 Reactor Building

~

Water Evaporation Ponds A

78 A

73 A

74 A

75 A

76

~

Facilities

~

DOE Burial Ground la] 1SFS I N !

2023 Annual Radiological Environmental Operating Report 4-15 Energy Northwest/Columbia Generating Station FIGURE 4-2 SELECT REMP SAMPLING LOCATIONS BETWEEN 0.8 AND 2.8 MILES St.33 0 0.5 1 2

3 4

I I 11 11 I I l 11 I I I 11 I I l 11 I 11 I Miles Colwrilia River 2

19 20 49 16 11 21 "26, 27 15 W 31 10 22 14 51 13 23 50 3

25 24 Water Sample

~

Sed iment

~

Facilities N

Dosimeter c==J Sec mity Barri er ~

DO E Burial Ground !

Ai r Sample

© Deep Well 1111 Reactor Building

~

ISFSI

~

Water

2023 Annual Radiological Environmental Operating Report 4-16 Energy Northwest/Columbia Generating Station FIGURE 4-3 SELECT REMP SAMPLING LOCATIONS BEYOND 2.8 MILES D

2-75 Water Sample

[=:J Security Barrier

~

Facilities N

Dosimeter

~

City Limits i

Air Sample Milk Sample

~

Water

2023 Annual Radiological Environmental Operating Report 4-17 Energy Northwest/Columbia Generating Station FIGURE 4-4 ISFSI DOSIMETER STATION LAYOUT Tra, Fence r--------------------------------------

ST-123 ST-124 ST-12.5 Secmityfence r-------0------0------ 0---------

1 I

I ISOlatiOl1 Fenu I

I I

I I

E ectric.i Cnlrl Bldg I

I I

I I

I 147ft I

I I

I ST-126 ~

ISF1W, 0 Y

SF2W I.~*

Q ST-271 I

I I

I ST-128 0 ST-130 9 I

I I

I I

ISFIS ISF2S

• S -136A Cry Fu Ca ST-137A Pad 1 Pad2 ST-138A 1

20-ft Isola n I

Zone J _ - - - - - - - - - - - - - - <r -

ST-1368 ST-1378 I

I I

I I

I I

I 0 ST-29

~SF1E f ISF2E 9 sr-3 LJ 468ft o 'Dosimeter Stations Former TLD Stations No longer monitored due to expansion Acuss oad

5.0 RESULTS AND DISCUSSION

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2023 Annual Radiological Environmental Operating Report 5-2 Energy Northwest/Columbia Generating Station 5.0 RESULTS AND DISCUSSION The 2023 Annual Radiological Environmental Operating Report for CGS covers the period from January 2023 to December 2023. Table 5-2 provides a summary of the ODCM required REMP samples and CGS groundwater monitoring analysis results in the format specified by the NRC. (5, 6)

Results for naturally occurring radionuclides that are not related to CGS operations have not been included in the summary table. The lower limit of detection (LLD) values listed in Table 5-2 are the ODCM required detection limits and are not the method detection limits listed in Table 4-4.

Analytical results for all REMP samples are presented in Appendix A of this volume. The following sections summarize the results in greater detail.

5.1 Direct Radiation Direct radiation is monitored at 80 dosimeter locations surrounding CGS. Dosimeters are exchanged on a quarterly frequency at all locations. The 16 locations designated as "S" stations are located between 0.3 and 0.8 miles from the CGS reactor building and all are inside the property boundary, see Figure 4-1 for station locations. Figure 5-1 below shows the 2023 "S" station mean quarterly dosimeter results separated into 16 geographical sectors around the plant. Figure 5-1 also shows the pre-operational mean and the high, low, and mean results in each sector for the 1984 - 2022 operational period for comparison. The 2023 S station dosimeter results were higher than the pre-operational and operational mean in all the 16 sectors. In 2021 OSL dosimeters were implemented, and the method for evaluating and reporting the environmental direct radiation exposure was modified to reflect recommendations from ANSI/HPS N13.37-2014. The apparent dose increases since 2021 when compared to historical measurements is due to a change in the method of background subtraction recommended by ANSI/HPS N13.37-2014. The specifics of this background subtraction is described in Table 4 of ANSI/HPS N13.37-2014.

Excluding the NNW sector data, the average deviation for the pre-operational period was

+31.75% in 2023. The ratio for 2023 versus operational period was +23.12%. The average deviation of 2023 to 2022 was 5.22%. Industry operating experience has indicated that when switching to a new vendor processing system, higher readings for OSL dosimeters compared to previous TLDs is expected, and not due to plant related increases of radiation exposure in the environment. The NNW sector is the closest S station to the ISFSI and the higher result here is attributed to the stations proximity to this facility.

2023 Annual Radiological Environmental Operating Report 5-3 Energy Northwest/Columbia Generating Station Figure 5-1 S Stations Quarterly Dosimeters 1984-2022 Hi/Low/Mean and 2023 Dosimeter Mean by Sector The 19 locations designated as near plant stations are located at distances between 0.9 and 2.1 miles from the CGS reactor building, see Figure 4-2 for station locations. Figure 5-2 shows the exposure rates for the near plant dosimeter locations separated into sixteen geographical sectors around the plant. Figure 5-2 also shows the pre-operational mean and the high, low, and mean results in each sector for the 1984-2022 operational period for comparison. Since 2021 the near plant dosimeter results were higher than the pre-operational and operational mean in all the 16 sectors. The apparent increase in the mean dosimeter results over the means of the preoperational and previous operational periods is due to the OSL dosimeters implemented, and the method for evaluating and reporting the environmental direct radiation exposure, which was modified to reflect recommendations from ANSI/HPS N13.37-2014. A significant source of the apparent dose increases when compared to historical measurements is due to a change in the method of background subtraction recommended by ANSI/HPS N13.37-2014. The specifics of this background subtraction are described in Table 4 of ANSI/HPS N13.37-2014.

2nd Quarter 2023 dosimeter for station 17 (near plant OSL) was lost due to fauna and could not be retrieved. The reported quarterly sum for this location is a normalized annual value based on the available 3 quarters of data. 2nd Quarter 2023 dosimeter for station 21 was changed out later than the rest but within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of all the near plant stations. There were no noticeable changes in dosimeter readings.

The deviation relative to the average dose of the pre-operational period was +29.9% in 2023. The deviation relative to the average dose in 2023 versus operational period was +22.0%. The average deviation of 2023 to 2022 was -1.34%. Industry operating experience has indicated that when switching to a new vendor processing system, higher readings for OSL dosimeters compared to previous TLDs is expected, and not due to plant related increases of radiation exposure in the environment.

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0.15 0.18 0.21 0.24 0.27 0.30 0.33 0.36 0.39 0.42 0.45 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W WNW NW NNW mR/Day S-Stations The picture can't be displayed. Pre-Operational Mean 2023 MEAN 1984-2022 High/Low/Mean

2023 Annual Radiological Environmental Operating Report 5-4 Energy Northwest/Columbia Generating Station Figure 5-2 Near Plant Stations Quarterly Dosimeters 1984-2022 Hi/Low/Mean and 2023 Dosimeter Mean by Sector Figure 5-3 Remote Stations Quarterly Dosimeters 1984-2022 Hi/Low/Mean and 2023 Dosimeter Mean by Sector The 22 dosimeter locations designated as remote locations are located between 2.83 and 28.35 miles from the CGS reactor building; see Figure 4-3 for station locations. Figure 5-3 above shows the exposure rates for the remote dosimeter locations separated into geographical sectors around the plant. Figure 5-3 also shows the pre-operational mean and the high, low, and mean results by sector 0.10 0.13 0.16 0.19 0.22 0.25 0.28 0.31 0.34 0.37 0.40 0.43 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W WNW NW NNW mR/Day Near Plant Stations Pre-Operational Mean 2023 MEAN 1984-2022 High/Low/Mean 0.15 0.19 0.22 0.26 0.29 0.33 0.36 0.40 0.43 0.47 N

NNE NE ENE E

ESE SE SSE S

SSW WSW WNW NNW mR/Day Remote Stations Pre Operational Mean 1984-2022 High/Low/Mean 2023 MEAN

2023 Annual Radiological Environmental Operating Report 5-5 Energy Northwest/Columbia Generating Station for the 1984-2022 operational period for comparison. The 2021-2023 remote dosimeter results were higher than both the pre-operational mean and the operational mean in all the 13 sectors due to the switch to OSL dosimeters in 2021 and the method of background subtraction. The method for evaluating and reporting direct radiation was modified to reflect recommendations of ANSI/

HPS N13.37-2014. Specifically the dose to control dosimeters while stored in vault is no longer subtracted.

Station 46 in the Wahluke Reserve (NE sector) remained the remote location with the highest exposure rate. This has been the case since the pre-operational measurement phase and is attributed to differences in the underlying rock and soil composition in this area.

2nd Quarter 2023 dosimeter for station 12 (remote OSL) was on ground and chewed on by fauna.

Data was still retrievable from vendor. No deviations for this station. 2nd Quarter 2023 dosimeter for station 43 was changed out later than the rest but within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of all the remote stations. There were no noticeable changes in dosimeter readings.

The remote stations average deviation relative to the operational period was 22.1% and the average deviation relative to the pre-operational period was 28.2% in 2023. The average deviation of 2023 from 2022 was -2.78%. The 2023 results indicate no observable dose contributions due to plant operations at locations outside the CGS controlled area. Dose contributions inside the CGS controlled area were limited to those locations known to be influenced by the ISFSI and/or radiation from the turbine building during operation. Environmental radiation exposure rates for 2023, the pre-operational period, and the long-term operational period are summarized in Table 5-3. See also Appendix A, Tables A-1.1 and B-1.1 for the 2023 quarterly dosimeter results. Dosimeter results for special interest locations are discussed in further detail in Section 5.9.

5.2 Airborne Particulate/Iodine Air samples are collected weekly at eleven locations in the vicinity of CGS. The control location is 28 miles WSW of CGS. Air particulate filters are analyzed for gross beta and iodine cartridges for radioiodine on a weekly basis. Air filters are also composited and analyzed for gamma emitting radionuclides every quarter.

Figure 5-4 below illustrates the 2023 mean weekly particulate filter gross beta results for the five stations located within three miles of CGS (See also Appendix A, Tables A-2.1, A-2.2). Results for the near plant stations are comparable with results from the remote locations and follow the trend of the control location.

2023 Annual Radiological Environmental Operating Report 5-6 Energy Northwest/Columbia Generating Station Figure 5-4 1985-2022 Weekly Hi/Low/Mean and 2023 Weekly Mean Gross Beta in Air - Near Plant Stations The 2023 mean weekly particulate filter gross beta results for the 6 sample stations located between 3 and 9.6 miles from CGS are shown in Figure 5-5 (See also Appendix A, Tables A-2.1, A-2.2). Results for these remote stations are similar to results from the near plant stations and follow the trend of the control location. No correlation between air gross beta activity and proximity to CGS was observed.

Figure 5-5 1985-2022 Weekly Hi/Low/Mean and 2023 Weekly Mean Gross Beta in Air - Remote Stations 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 1

3 5

7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 pCi/m3 WEEK Near Plant Stations HIGH/LOW/MEAN 1985-2022 MEAN 2023 CONTROL MEAN 2023 Data from 1986 weeks 19-23 not included due to Chernobyl 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 1

3 5

7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 pCi/m3 WEEK Remote Stations HIGH/LOW/MEAN 1985-2022 MEAN 2023 CONTROL MEAN 2023 Data from 1986 weeks19-23 not included due to Chernobyl

2023 Annual Radiological Environmental Operating Report 5-7 Energy Northwest/Columbia Generating Station For both the near plant and remote air station locations, higher results and greater variability in air gross beta activity historically have been observed during fall and winter months due to weather induced background fluctuations. Gross beta levels generally increase during periods of inversion due to natural decay products being trapped near the earth surface. Gross beta results plotted over a period of several years typically show a cyclical pattern with higher results observed in the fall and winter compared to the spring and summer. Gross beta results were observed above the average trend range in January, February, and November. The increases observed during these periods occurred at all sample locations including the control and are attributed to weather phenomena and not the result of CGS operation. The highest particulate filter gross beta results for the year occurred during weeks 44, 48, and 50; weather conditions for the week were characterized by gusty winds, cooler temperatures and some forest fire smoke.

Quarterly gamma isotopic analysis of the air particulate filters identified the presence of beryllium-7 in all the control and indicator composite samples (See Appendix A, Tables A-3.1, A-3.2).

Beryllium-7 is a naturally occurring radionuclide formed in the upper atmosphere by interaction with cosmic radiation and is not a radionuclide associated with CGS operation. No radioisotopes associated with CGS operation were identified in any of the quarterly air particulate gamma isotopic sample results.

The 2023 weekly iodine cartridge isotopic results showed no indication of radioiodines in any of the samples. Results for iodine-131 were, in all cases, below the lower limit of detection (See Appendix A, Tables A-4.1, A-4.2). The 2023 air particulate and iodine sample results show no evidence of measurable environmental radiological air quality impact that can be attributed to CGS plant operation.

5.3 Water 5.3.1 Surface Water Monthly composite surface water samples are collected at five different locations and analyzed for tritium, gross beta, and gamma emitting radionuclides. Figure 5-6 below shows a graph of the 2023 gross beta results for the plant intake, plant discharge, and river/drinking water stations.

Figure 5-6 Gross Beta in River/Drinking (Stations 26 & 29) and Plant Discharge Water (Station 27) for 2023

-2.0 3.0 8.0 1

2 3

4 5

6 7

8 9

10 11 12 PCI/LITER MONTH GROSS BETA IN WATER 2023 Station 26 Station 27 Station 29

2023 Annual Radiological Environmental Operating Report 5-8 Energy Northwest/Columbia Generating Station All drinking and river water (Stations 26 and 29) gross beta results were below the analysis detection limits (See Appendix A, Tables A-5.1, A-5.2). Gross beta levels in the plant discharge water (Station 27) were above the detection limits in eight samples. Positive results for this location are expected due to concentration of natural radioactivity in the water by evaporative loss and the scrubbing action of the cooling towers which incorporates atmospheric particulate material into the discharge water. Historically, higher gross beta results at Station 27 can be correlated to the level of calcium concentration in the CGS circulating water. The Station 27 sample results are representative of the radioactivity present in plant discharge water before any mixing with river water occurs.

Monthly tritium results for all plant intake, plant discharge, and river/drinking water samples were below the analysis method a priori LLD. Tritium results for the three sample locations are illustrated in Figure 5-7 below. The quarterly averages for the locations are listed in Appendix A, Tables A-6.1, A-6.2.

Gamma spectrometry results for all plant intake, plant discharge, and river/drinking water samples identified only naturally occurring radionuclides; no gamma-emitting radionuclides related to CGS operation were positively identified in these samples (See Appendix A, Tables A-7.1, A-7.2, A-13.1, A-13.2).

Figure 5-7 Tritium in River/Drinking (Stations 26 & 29) and Plant Discharge Water (Station 27) for 2023 Analysis results for the plant intake, plant discharge, and river/drinking water samples showed no measurable impact to the environment due to CGS plant operations in 2023. Composite water samples are also taken from a sanitary waste and storm drain location. Analysis results for these samples are discussed in further detail in Section 5.9.

5.3.2 Groundwater Samples from 3 deep wells were collected quarterly to meet ODCM and EFSEC Resolution No.

332(9) requirements. Quarterly samples were also collected from eight shallow groundwater monitoring wells located near CGS the first and second quarter of 2023, and six shallow wells the third and fourth quarter of 2023 as part of the CGS groundwater monitoring program. Two of the 0

100 200 300 400 500 600 1

2 3

4 5

6 7

8 9

10 11 12 Tritium In Water 2023 pCi/Liter Month Station 26 pCi/L Station 27 pCi/L Station 29 pCi/L Tritium LLD (300 pCi/L)

2023 Annual Radiological Environmental Operating Report 5-9 Energy Northwest/Columbia Generating Station shallow wells, 3 and 9, had declined in their water column such that quarterly samples could not be taken in the third and fourth quarter. All well samples were analyzed for tritium and gamma emitting radionuclides. Well locations sampled are shown in Figures 4-1 and 4-2.

Analytical results for the three deep water wells were consistent with results seen in previous years. Tritium results were below detection limits and no gamma emitting radionuclides related to CGS operation were identified in any samples (See Appendix A, Tables A-6.1, A-6.2, A-14.1, and A-14.2).

The CGS groundwater monitoring program is conducted to meet the Nuclear Energy Institute (NEI) Groundwater Protection Initiative (NEI 07-07) (17) guidelines and to support NPDES requirements. Water samples from the unconfined aquifer are collected quarterly from eight shallow monitoring wells located around the CGS site. None of these monitoring wells are used as a source of drinking water. CGS is unique in the commercial nuclear power industry in that it is in an area where the unconfined aquifer under the site is known to be contaminated with tritium as a result of past DOE activities on the Hanford Site. (19) The CGS groundwater program is intended to assess any contribution CGS may be making to the known groundwater contamination issue.

Gamma Spectroscopy results for the shallow monitoring wells identified only natural occurring radionuclides (See Appendix A, Tables B-10.1, and B-10.2). The 2023 groundwater sample results show no evidence that CGS made a measurable radiological impact on groundwater.

Tritium results for the shallow monitoring wells ranged from < LLD to 11,100 pCi/liter (See Appendix A, Table B-11.1). Tritium results from each well were consistent during the year and within the trend range observed in previous years. The highest tritium concentrations were measured at MW-5 which is hydraulically up-gradient of CGS. The tritium identified in the shallow monitoring well samples is the result of past DOE activities on the Hanford site and is not attributable to CGS operation. Historically, the only identified impact that CGS operation has had on groundwater tritium concentrations was through the discharge of storm drain water. With the establishment of lined evaporation ponds in 2014, this pathway was effectively eliminated.

All storm drain water from the CGS site has been directed to the lined evaporation ponds since then.

5.4 Soil In 2023, gamma spectroscopy analysis was performed on soil samples from five different locations (See Appendix A, Tables A-8.1, A-8.2). Two samples were collected from locations near CGS, one sample was collected north of CGS, one sample was collected from locations east of CGS in Franklin County, and one sample was collected from a control location. Naturally occurring radionuclides were identified in all samples. Cesium-137 was identified at two of the indicator locations for both of their samples (stations 1 and 7). One control station had cesium-137 indicated as well (station 9). The level of cesium-137 identified was within the range considered normal background and consistent with cesium-137 concentrations found in Hanford area soils.(21,22) The cesium-137 activity identified was below the level that would require strontium-90 analysis to be performed.(9) The soil sample results indicate no measurable impact from CGS plant operation.

2023 Annual Radiological Environmental Operating Report 5-10 Energy Northwest/Columbia Generating Station 5.5 River Sediment Gamma spectroscopy results of river sediment identified naturally occurring radionuclides and cesium-137 was identified (See Appendix A, Tables A-9.1, 9.2). Relative to the circulating water discharge point, cesium-137 was detected in the downstream samples (Station 34) but not in the upstream samples (Station 33). The downstream cesium-137 activity levels were similar to the levels identified in previous years and within the range known to be present in Hanford area sediment and soil.(21,24) Cesium-137 was not identified in any samples of plant cooling water discharged to the Columbia River. CGS has not made a radioactive discharge to the Columbia River since 1998. The sediment sample results indicate no measurable impact from CGS plant operation.

5.6 Fish The gamma spectroscopy results of fish samples collected at both the indicator location (Columbia River) and the control location (Snake River) identified only the presence of naturally occurring radionuclides (See Appendix A, Tables A-10.1, 10.2). Due to lack of donations and the lack of success of REMP personal we were unable to capture all the resident species required by ODCM table 6.3.1-1 4B, which specifies collection of three fish species in the vicinity of the plant discharge and collection of the same three species at a control location not influenced by plant discharge (usually the SNAKE river). The EFSEC Resolution 332 Monitoring Program Elements sampling requirements are one sample from 3 species, one anadromous and two resident in the vicinity of the plant discharge area and same samples or similar species from areas not influenced by plant discharge. The REMP program is dependent on fish donations from local fisherman. There were 2 chinook donations, one from the CGS discharge area and one from the snake which fulfills the anadromous samples, and one type of resident fish (small mouth bass) was donated that came from the plant discharge area and no resident fish from a control area. We did not get 3 fish species from the plant discharge area (only two) and we did not get three species from a control location (only one). Several man hours were dedicated by REMP dept individuals in attempts to capture fish using rod and hook method without success. Electroshock methods cannot be employed by CGS due to concerns about violating Federal endangered species act regs. No radiological impact attributable to CGS operation was identified in the 2023 fish sample results.

5.7 Milk There was no radioiodine activity identified in any of the milk samples collected in 2023 (See Appendix A, Tables A-11.1, A-11.2). Gamma spectroscopy results of milk radionuclides other than radioiodine did not identify the presence of any radionuclides of interest (See Appendix A, Tables A-12.1, A-12.2). Naturally occurring potassium-40 was identified in all milk samples.

5.8 Garden Produce In 2023, gamma analysis was performed on forty-four samples of fruits, vegetables, and root crops (See Appendix A, Tables A-15.1, A-15.2, A-16.1, A-16.2, A-17.1, A-17.2). I-131 was identified in one control station (station 9B Grandview, WA) sample of apples but was well below reporting limit of ODCM table 6.3.1-2. No other radionuclides related to CGS operation were identified in any of the samples. Naturally occurring potassium-40 was identified in all samples.

2023 Annual Radiological Environmental Operating Report 5-11 Energy Northwest/Columbia Generating Station 5.9 Special Interest Stations Sampling and analysis are performed at the locations covered in this section to comply with EFSEC requirements or as a CGS initiative. Sanitary Waste Treatment Facility (SWTF) and storm drain water sampling were incorporated into the routine sampling schedule in 1992. In 1995, the cooling tower sediment disposal area was added. Direct monitoring in the vicinity of the planned ISFSI was first performed in 1998 to collect background data and direct monitoring was established on the ISFSI fence line after construction was completed in 2002. Additional dosimeter locations were established in 2008/2009 to monitor potential remediation work at the DOE 618-11 burial ground west of CGS. Discussion of the results from each of these locations is given in the following sections.

5.9.1 Evaporation Pond (Station 101B)

The Station 101B composite sampler samples storm drain, air wash, and non-radioactive system wastewater originating from within the CGS protected area. Water from these sources has been directed to two lined evaporation ponds since November 2014. Wastewater originating outside the CGS protected area is typically directed to three other lined evaporation ponds that are not sampled by the Station 101B sampler. Figure 4-1 shows the location of the five evaporation ponds; Station 101B samples water flowing into ponds 3 and 4. Sampling and analysis at this location is specified in EFSEC Resolutions. (9,23) Historically, the water directed to the evaporation ponds was discharged to an unlined storm drain pond. Remediation of the historic storm drain pond was completed in 2016.

Monthly composite water samples were analyzed for gamma emitting radionuclides, tritium, and gross beta. Gamma spectroscopy results identified only the presence of naturally occurring radionuclides (See Appendix A, Tables B-2.1, B-2.2). Gross beta was identified above background in four of the twelve monthly samples (See Appendix A, Tables B-3.1, B-3.2).

Tritium was detected in nine of the twelve monthly samples (See Appendix A, Tables B-4.1, B-4.2). The samples with higher tritium levels were mostly from colder, wetter months which is consistent with results seen in previous years. The source of the tritium in storm drain water is attributed to recapture of tritium from CGS gaseous effluents which is more likely to occur during cooler, rainier periods. The total amount of tritium calculated to have been recaptured in CGS storm drain water in 2023 was within normal trends from past data.

Water grab samples were taken from all five ponds in May and analyzed for tritium, gross beta, and gamma emitting radionuclides. Gamma spectroscopy results identified only the presence of naturally occurring radionuclides (See Appendix A, Tables B-12.1). Gross beta was detected in three of the five ponds (See Appendix A, Table B-14.1). Tritium was detected above the detection limit in one of the five ponds (See Appendix A, Table B-15.1).

Sediment samples were collected in September from evaporation ponds 3 and 4 and analyzed for gamma emitting radionuclides. Samples were collected when ponds were dry or nearly dry allowing sediment to be collected from multiple locations. Cobalt 60 was identified evaporation pond 4. Trace amounts of Cobalt 60 has previously been documented. The source material is

2023 Annual Radiological Environmental Operating Report 5-12 Energy Northwest/Columbia Generating Station from re-entrained material from roof vents and regulated emission points. evaporation pond 3 only had naturally occurring radionuclides were identified. (See Appendix A, Table B-13.1).

5.9.2 Sanitary Waste Treatment Facility (Station 102B)

The Sanitary Waste Treatment Facility (SWTF) is located approximately 0.5 miles south-southeast of CGS. The facility processes sanitary wastewater from CGS, the ENW Industrial Development Complex (formerly referred to as WNP-1 and WNP-4), and the Kootenai Building. The Station 102B composite sampler collects wastewater as it enters the SWTF head works. Discharge standards and monitoring requirements for the SWTF are established in EFSEC Resolution No.

300. (16)

Low level gross beta was identified in all the twelve Station 102B samples. The levels identified did not differ significantly from previous years. Gross alpha was positively identified in one of the Station 102B samples but did not exceed any EFSEC limits (See Appendix A, Tables B-5.1, B-5.2, B-6.1, and B-6.2).

Gamma spectroscopy results of the monthly Station 102B samples identified only naturally occurring radionuclides (See Appendix A, Tables B-7.1, B-7.2). Tritium activity was not identified in Station 102B samples in 2023 (See Appendix A, Tables B-8.1, B-8.2).

Figure 5-8 Tritium in Sewage Treatment Facility (Stations 102B) with uncertainties and LLD for analysis in 2023 5.9.3 Cooling System Sediment Disposal Area (Station 119)

EFSEC Resolution No. 299(18) and ML22004A185 (25) authorizes the onsite disposal of sediments from plant cooling systems containing low levels of radionuclides. The disposal area for these sediments is located just south of the CGS cooling towers. EFSEC Resolution No. 299(18) and ML22004A185(25) requires direct radiation monitoring using quarterly dosimeters in the vicinity of the disposal cells and the collection and analysis of a dry composite sediment sample from the disposal cell within thirty days following each cleaning to confirm that the disposal criteria outlined in the resolution have not been exceeded.

0.00E+00 5.00E+01 1.00E+02 1.50E+02 2.00E+02 2.50E+02 3.00E+02 3.50E+02 SWTF 2023 Tritium pCi/Liter Activity LLD

2023 Annual Radiological Environmental Operating Report 5-13 Energy Northwest/Columbia Generating Station The source of the radioactivity identified in cooling tower sediment is attributed to incorporation of radionuclides present in the general environment (cesium-137) or recapture of radionuclides in CGS gaseous effluents (cobalt-60). As air is pulled through the cooling towers, atmospheric particles are incorporated into the cooling water. Algae and other biological organisms present in the cooling tower environment actively assimilate the radionuclides resulting in concentrated and measurable levels of the radionuclides in these biological materials. The material removed during cleaning and referred to as sediment is composed in large part of algae and other biological organisms that exist in the cooling tower environment.

Cleaning of the CGS cooling towers was performed in May 2023. The May cleaning was limited to the upper tower decks only. Disposal of the material removed resulted in an estimated 21 cubic meters of dry sediment being added to the disposal cells in May.

A summary of the estimated mass and radionuclide content of all transfers to the disposal cell area in 2023 is presented in Table 5-4. For those isotopes listed in the table that were not positively identified, the MDA value obtained from the sample analysis was used in the table calculations. As such, the total activity reported is a conservative estimate.

As shown in Table 5-4, all material transferred to the disposal cell area in 2023 (See Appendix A, Tables B-9.1) was considerably below the disposal concentration limits specified in EFSEC Resolution No. 299. (18) The cesium-137 activity level identified was within the range typically observed in Hanford area soils.

Measurements of direct radiation at the disposal pit area were taken using dosimeters. Two locations were used, an indicator location by the collection area (Station 119B) and a control location approximately 200 yards to the east (Station 119Ctrl). 119B and 119Ctrl show an increase step change due to the OSL dosimeters implemented in 2021, and the method for evaluating and reporting the environmental direct radiation exposure being modified to reflect recommendations from ANSI/HPS N13.37-2014. A significant source of the apparent dose increase compared to historical measurements is due to a change in the method of background subtraction recommended by ANSI/HPS N13.37-2014. The specifics of this background subtraction are described in Table 4 of ANSI/HPS N13.37-2014. The negligible difference between the indicator and the control dosimeters indicates that there was no measurable dose contribution above background due to material in the disposal cells (See Tables 5.3 and Appendix A, Tables B-1.1).

60.000 110.000 160.000 2012 Annual Sum mR 2013 Annual Sum mR 2014 Annual Sum mR 2015 Annual Sum mR 2016 Annual Sum mR 2017 Annual Sum mR 2018 Annual Sum mR 2019 Annual Sum mR 2021 Annual Sum mR 2022 Annual Sum mR 2023 Annual Sum mR Cooling System Sediment Disposal Area (Station 119) milli-Roentgen (mR) per year Station 119B Station119Ctrl

2023 Annual Radiological Environmental Operating Report 5-14 Energy Northwest/Columbia Generating Station Figure 5-9 Measurements of direct radiation at the Cooling System Sediment Disposal Area 2012 to 2023 2023 Cooling System Sediment Disposal Data Disposal Date 5/16/2023

==

Description:==

Upper and Lower decks Pit ID:

2019a, 2019b Mass, kg 55,220 Density, g/cc 0.593

• Unity Calculation 4.06E-02 Nuclide Limit (pCi/kg)

Analytical Result (pCi/kg)

Total Activity (Curie)

Co-60 5.00E+03

< 1.52E+01 8.39E-07 Mn-54 3.00E+04

< 1.36E+01 7.51E-07 Zn-65 5.00E+04

< 6.0E+01 3.29E-06 Cs-134 1.00E+04

< 3.0E+01 1.68E-06 Cs-137 2.00E+04 3.68E+01 2.03E-06 Total:

8.59E-06

• The sum of the fractions of maximum concentration for each nuclide does not exceed 1 in accordance with EFSEC Resolution 299, Attachment 1 Section 3B.

Table 5-4 Cooling System Sediment Activity Levels for Disposals Made in 2023 5.9.4 Independent Spent Fuel Storage Installation The Independent Spent Fuel Storage Installation (ISFSI) is a fenced, secured area north northwest of CGS. Twelve dosimeter stations are located on the second of three security fences that surround the ISFSI. Four other dosimeter locations; Stations 121, 122, 155, and 156, are located near the ISFSI to provide additional monitoring of ISFSI direct radiation. In 2016, the ISFSI was expanded, and a new pad was installed. Refer to Figure 4-4 for a map showing ISFSI dosimeter locations.

New spent fuel casks were added to the ISFSI in May 2023. As shown in Figure 5-8, exposure rates at the ISFSI fence line show a slight upward trend since the second quarter 2023 when spent fuel was last added to the ISFSI. The increase seen during the 2nd quarter 2023 was seen more by dosimeters at Station 138B,137B and 136B which are along the SW end of the ISFSI fence line where the new spent fuel cast was placed.

2023 Annual Radiological Environmental Operating Report 5-15 Energy Northwest/Columbia Generating Station Figure 5-8 ISFSI Dosimeter Trend at CGS As discussed earlier in the dosimeter results OSL dosimetry was implemented in 2021. There appears to be a slight increase from past data prior to 2021for many of the stations but this is due to the OSL dosimeters implemented, and the method for evaluating and reporting the environmental direct radiation exposure being modified to reflect recommendations from ANSI/HPS N13.37-2014. A significant source of the apparent dose increases when compared to historical measurements is due to a change in the method of background subtraction recommended by ANSI/HPS N13.37-2014. The specifics of this background subtraction are described in Table 4 of ANSI/HPS N13.37-2014. Results from these locations are slightly above background as expected due to their proximity to the ISFSI. Station 131 also showed a slight increase most likely due to its proximity to the ISFSI southeast end of the fence line and could be picking up some shine from the new spent fuel. Station 121 showed an increase late in 2023.

This location has predominately been influenced by turbine building radiation levels and not the ISFSI (See Table 5-3 and Appendix A, Tables B-1.1, B-1.2).

5.9.5 Miscellaneous Environmental Sample Results Apple samples from both control and indicator locations were collected in the summer and fall /

winter of 2023 and analyzed for carbon-14 content. Analyses were performed by the Washington State Department of Health Laboratory. Results were similar for both indicator and control samples.

Carbon-14 activities were below the level of detection. The results do not indicate any discernable effect attributable to CGS operation (See Appendix A, Table B-17.1).

5.10 2023 Sample Deviations 0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0 3.4 Mean mR/Day Trend of Exposure Rates at ISFSI Fence Line 124 125 126 127 128 129 136A 137A 138A 130 131 136B 123 137B 138B 121

---

0--- - -

2023 Annual Radiological Environmental Operating Report 5-16 Energy Northwest/Columbia Generating Station A summary of REMP sample deviations encountered in 2023 is listed below in Table 5-1A through 5-1C. All known deviations from the sampling schedule (i.e., sample was not obtained) or analyses where the ODCM specified lower limit of detection was not achieved are included. For ODCM or EFSEC specified locations where composite or continuous samples are collected, any known period greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during which samples were not collected have been included. Inclusion of ODCM related sample deviations in Tables 5-1A and 5-1C serves to meet the required compensatory measure listed in ODCM RFO 6.3.1 A.1. Table 5-1D lists information regarding air sampling station requirements. Table 5-1E lists information regarding water sample station sampling requirements.

TABLE 5-1A ODCM REMP Sample Deviations for 2023 SAMPLE MEDIA DATE LOCATION CONDITION REPORT/WORK ORDER PROBLEM PLANS FOR PREVENTING RECURRENCE Air 12/26/23 Station 57 CR#453841 Station 57 only ran 20.24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for the seven-day period. Pump was found off when collecting filters.

Suspect a blown fuse in the pump. The pump was replaced with a spare and left running. Station 1 is an alternate station, and it collected a complete sample.

Corrective actions are deemed not possible due to the remote nature of the sample station. Pump restored and alternate station fully collected.

TABLE 5-1B EFSEC REMP Sample Deviations for 2023 SAMPLE MEDIA DATE LOCATION CONDITION REPORT/WORK ORDER PROBLEM PLANS FOR PREVENTING RECURRENCE Air 5/23/23 Station 7 CR#445884 Air Sample Station 7 was found off. Hanford did generator maintenance from 7am-2 pm and all the air samplers at station 7 were off. We lost about one hour on our off sample and about 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> for our on sample Corrective actions are deemed not possible due to the remote nature of the sample station. Pump restored

2023 Annual Radiological Environmental Operating Report 5-17 Energy Northwest/Columbia Generating Station TABLE 5-1C ODCM & EFSEC REMP Sample Deviations for 2023 SAMPLE MEDIA DATE LOCATION CONDITION REPORT/WORK ORDER PROBLEM PLANS FOR PREVENTING RECURRENCE Air 1/10/23 Station 8 CR#440574 Air sample Station 8 pump found off. Suspect power surge caused fuse failure. Fuse replaced and pump restored. It appears that collection time stopped just under 3 days (68.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />) to collection time.

Station 23 is listed as an alternate station of Station 8 and a complete sample for that week was collected from station 23.

Corrective actions are deemed not possible due to the remote nature of the sample station. Pump restored and alternate station 23 used.

Water 1/13/23 Station 27 CR#440097 CR#440739 Station 27 circ water blowdown samplers out of service with blowdown in progress. Manual sampling was missed from 1/13-1/15 Composite samples were taken manually and combined to fulfill sampling requirements Direct Radiation 6/26/23 Station 17 CR#447906 Station 17 dosimeter (OSL) missing and not found.

The other 3 quarters of dose were averaged to accommodate dose for 2nd Quarter 2023.

Metal zip ties were purchased and used on these remote stations that have a history of animal interactions that cause lost or damaged dosimetry. No more losses for the year.

Air 7/25/23 Station 48 CR#448830 Station 48 power to station found off. Transformer issues at station. Power company informed. Station only ran 23 hours2.662037e-4 days <br />0.00639 hours <br />3.80291e-5 weeks <br />8.7515e-6 months <br /> for the week sample period Corrective actions are deemed not possible due to the remote nature of the sample station. Power company informed and power restored.

Fish 12/31/23 Snake and Columbia Rivers CR# 454325 ODCM REMP Fish Sampling Requirements not met in 2023 Devote more resources to fish collection events and evaluate alternative methods to conventional hook and line collection, such as electrofishing, pursuant with the allowances of EFSEC Resolution 347

2023 Annual Radiological Environmental Operating Report 5-18 Energy Northwest/Columbia Generating Station Table 5-1D below shows the percent in service time for the twelve air sample locations. The table shows overall availability for all ODCM required locations was 97.0% or greater.

TABLE 5-1D CGS REMP Air Sample Percent in Service Time for 2023 Station ID ODCM Required EFSEC Required Percent Time in Service 1

x 99.95%

4 x

x 99.82%

5 99.85%

6 x

99.84%

7 x

99.64%

8 x

x 99.05%

9 x

x 99.83%

21B 98.62%

23 x

99.85%

40 x

x 99.89%

48 x

x 97.91%

57 x

98.20%

Table 5-1E below shows the percent in service time for the five water locations. The table shows overall availability for all ODCM required locations was 98.0% or greater.

TABLE 5-1E CGS REMP Water Sample Percent in Service Time for 2023 Station ID ODCM Required EFSEC Required Percent Time in Service 26 x

x 99.98%

27 x

x 98.81%

29 x

x 100.00%

101B x

99.98%

102B x

100.00%

Table 5-2 below summarizes the analytical results for all ODCM required REMP samples and CGS groundwater monitoring. The results are presented in a format consistent with Table 3 of the NRC Branch Technical Position (6) paper on radiological environmental monitoring. The mean and range values are based on detectable results only. The table contains the following:

Media or pathway sampled and the units of measurement.

Analysis type and total number of analyses performed.

The lower limit of detection for the analysis type.

Mean and range for all indicator locations, and the ratio of detectable measurements to the number of total measurements made for all indicator locations.

2023 Annual Radiological Environmental Operating Report 5-19 Energy Northwest/Columbia Generating Station Mean and range for all control locations, and the ratio of detectable measurements to the number of total measurements made at the control locations.

For analysis types where detectable measurements were made, the location with the highest annual mean, distance, and direction of location from CGS, and the mean, range and ratio of detectable measurements to the number of total measurements for that location.

The number of nonroutine reported measurements.

TABLE 5-2 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Environmental Direct Radiation Units: mR/std. quarter Analysis Type Total Analyses Performed Lower Limit of Detection (LLD)

Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Dosimeter Quarterly 227 28.7 (223 / 223)

(19.5-40.3) 86 NNW 0.310 miles 36.77 (4 / 4)

(33.6-37.2) 25.3 (4 / 4)

(22.7-29.0) 0

a. (f) is the number of positive measurements / total measurements at specified location.

Reference Appendix A, Tables A-1.1, A-1.2 In 2021, the OSL dosimeters were implemented.

2023 Annual Radiological Environmental Operating Report 5-20 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: ISFSI Direct Radiation Units: mR/std. quarter Analysis Type Total Analyses Performed Lower Limit of Detection (LLD)

Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Dosimeter Quarterly 52 127.6 (48 / 48)

(69.2-278.0) 138B NNW 0.17 miles 228.0 (4 / 4)

(187.0-210.8) 29.8 (4 / 4)

(24.6-34.9) 0

a. (f) is the number of positive measurements / total measurements at specified location.

Reference Appendix A, Tables B-1.1, B-1.2 ISFSI Dosimeters are Stations 123 to 131, and 136B to 138B. Station 130 and 131 were added in the 1st quarter 2017.

In 2021, the OSL dosimeters were implemented.

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Air Particulate/Air Radioiodine Units: pCi/m3 Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Gross Beta 624 0.01 0.0154 (572 / 572)

(-0.000418-0.0644) 5 ESE 7.72 miles 0.0175 (52 / 52)

(0.0055-0.0459) 0.0141 (52 / 52)

(0.00422-0.0397) 0 I-131 624 0.07 (0 / 572)

(0/ 52) 0 Cs-134 48 0.05

--- (0 / 44)

--- (0 / 4) 0 Cs-137 48 0.06

--- (0 / 44)

--- (0 / 4) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-2.1, A-2.2, Tables A-3.1, A-3.2, and Tables A-4.1, A-4.2.

2023 Annual Radiological Environmental Operating Report 5-21 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Water-River/Drinking Units: pCi/L Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) c Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Gross Beta 24 4.0

--- (0 / 12) (b)

--- (0 / 12) 0 H-3 8

2000

--- (0 / 12) (b)

--- (0 / 4) 0 Mn-54 24 15

--- (0 / 12) (b)

--- (0 / 12) 0 Fe-59 24 30

--- (0 / 12) (b) 26 E 3.2 miles 8.09 (1 / 24) (b)

(-5.04-8.09) 8.09 (1 / 12)

(-5.04-8.09) 0 Co-58 24 15

--- (0 / 12) (b)

--- (0 / 12) 0 Co-60 24 15

--- (0 / 12) (b)

--- (0 / 12) 0 Zn-65 24 30

--- (0 / 12) (b)

--- (0 / 12) 0 Zr/Nb-95 24 15

--- (0 / 12) (b)

--- (0 / 12) 0 Cs-134 24 15

--- (0 / 12) (b)

--- (0 / 12) 0 Cs-137 24 18

--- (0 / 12) (b)

--- (0 / 12) 0 Ba/La-140 24 15

--- (0 / 12) (b)

--- (0 / 12) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. This includes the control sample for this group; the control (Station 26) is also a drinking water sample.

c. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-5.1,A-5.2, Tables A-6.1, A-6.2, and Tables A-7.1, A-7.2

2023 Annual Radiological Environmental Operating Report 5-22 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Water-Discharge Units: pCi/L Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f) a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Gross Beta 12 4.0 3.630 (8/24)(b)

(0.510-6.88) 27 E 3.2 miles 3.630 (8/24)(b)

(0.510-6.88)

--- (0 / 0) 0 H-3 4

2000

--- (0 / 4)

--- (0 / 0) 0 Mn-54 12 15

--- (0 / 12)

--- (0 / 0) 0 Fe-59 12 30

--- (0 / 12)

--- (0 / 0) 0 Co-58 12 15

--- (0 / 12)

--- (0 / 0) 0 Co-60 12 15

--- (0 / 12)

--- (0 / 0) 0 Zn-65 12 30

--- (0 / 12)

--- (0 / 0) 0 Zr/Nb-95 12 15

--- (0 / 12)

--- (0 / 0) 0 Cs-134 12 15

--- (0 / 12)

--- (0 / 0) 0 Cs-137 12 18

--- (0 / 12)

--- (0 / 0) 0 Ba/La-140 12 15

--- (0 / 12)

--- (0 / 0) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-5.1,A-5.2, Tables A-6.1, A-6.2, and Tables A-13.1, A-13.2

2023 Annual Radiological Environmental Operating Report 5-23 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Water-Deep Ground Units: pCi/L Analysis Type Total Analyses Performed Lower Limit of Detection (LLD)b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range H-3 12 2000

--- (0 / 12)

--- (0 / 0) 0 Mn-54 12 15

--- (0 / 12)

--- (0 / 0) 0 Fe-59 12 30

--- (0 / 12)

--- (0 / 0) 0 Co-58 12 15

--- (0 / 12)

--- (0 / 0) 0 Co-60 12 15

--- (0 / 12)

--- (0 / 0) 0 Zn-65 12 30

--- (0 / 12)

--- (0 / 0) 0 Zr/Nb-95 12 15

--- (0 / 12)

--- (0 / 0) 0 Cs-134 12 15

--- (0 / 12)

--- (0 / 0) 0 Cs-137 12 18

--- (0 / 12)

--- (0 / 0) 0 Ba/La-140 12 15

--- (0 / 12)

--- (0 / 0) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-6.1, A-6.2, and Tables A-14.1, A-14.2

2023 Annual Radiological Environmental Operating Report 5-24 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Water-Shallow Ground Units: pCi/L Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range H-3 28 2000 3060 (13 / 28)

(-3.38-11,100)

MW-5 SW 0.43 miles 10,737 (4 / 4)

(10,500-11,100)

--- (0 / 0) 0 Mn-54 28 15

--- (0 / 28)

--- (0 / 0) 0 Fe-59 28 30

--- (0 / 28)

--- (0 / 0) 0 Co-58 28 15

--- (0 / 28)

--- (0 / 0) 0 Co-60 28 15

--- (0 / 28)

--- (0 / 0) 0 Zn-65 28 30

--- (0 / 28)

--- (0 / 0) 0 Zr/Nb-95 28 15

--- (0 / 28)

--- (0 / 0) 0 Cs-134 28 15

--- (0 / 28)

--- (0 / 0) 0 Cs-137 28 18

--- (0 / 28)

--- (0 / 0) 0 Ba/La-140 28 15

--- (0 / 28)

--- (0 / 0) 0

a. (f) is the number of positive measurements / total measurements at specified location.

28

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

28 Reference Appendix A, Tables B-10.1, B-10.2, and B-11.1.

2023 Annual Radiological Environmental Operating Report 5-25 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: River Sediment Units: pCi/kg Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Cs-134 4

150

--- (0 / 2)

--- (0 / 2) 0 Cs-137 4

180 120 (2 / 2)

(72.0168) 34 ESE 3.32 Miles 120 (2 / 2)

(72.0168)

--- (0 / 2) 0 Co-60 4

--- (0 / 2)

--- (0 / 2) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-9.1, A-9.2.

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Roots Units: pCi/kg Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range I-131 7

60

--- (0 / 6)

--- (0 / 1) 0 Cs-134 7

60

--- (0 / 6)

--- (0 / 1) 0 Cs-137 7

80

--- (0 / 6)

--- (0 /1) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-15.1, A-15.2.

2023 Annual Radiological Environmental Operating Report 5-26 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Fruits Units: pCi/kg Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range I-131 16 60

--- (0 / 7) 9C WSW 28 Miles 3.35(1/9)

(-1.93-20.1) 3.35(1/9)

(-1.93-20.1) (1 / 9) 0 Cs-134 16 60

--- (0 / 7)

--- (0 / 9) 0 Cs-137 16 80

--- (0 / 7)

--- (0 / 9) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Table A-16.1, A-16.2.

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Vegetables and Vegetation Units: pCi/kg Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range I-131 21 60

--- (0 / 17)

--- (0 / 4) 0 Cs-134 21 60

--- (0 / 17)

--- (0 / 4) 0 Cs-137 21 80

--- (0 / 17)

--- (0 / 4) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Table A-17.1, A-17.2.

2023 Annual Radiological Environmental Operating Report 5-27 Energy Northwest/Columbia Generating Station TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Fish Units: pCi/kg Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range Mn-54 3

130

--- (0 / 2)

--- (0 / 1) 0 Fe-59 3

260

--- (0 / 2)

--- (0 / 1) 0 Co-58 3

130

--- (0 / 2)

--- (0 / 1) 0 Co-60 3

130

--- (0 / 2)

--- (0 / 1) 0 Zn-65 3

260

--- (0 / 2)

--- (0 / 1) 0 Cs-134 3

130

--- (0 / 2)

--- (0 / 1) 0 Cs-137 3

150

--- (0 / 2)

--- (0 / 1) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Table A-10.1, A-10.2.

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2023 Medium: Milk Units: pCi/L Analysis Type Total Analyses Performed Lower Limit of Detection (LLD) b Indicator Locations Mean (f)a Range Location With Highest Annual Mean Control Locations Mean (f)a Range Number of Nonroutine Measurements Location Information Mean (f)a Range I-131 36 1.0

--- (0 / 18)

--- (0 / 18) 0 Cs-134 36 15

--- (0 / 18)

--- (0 / 18) 0 Cs-137 36 18

--- (0 / 18)

--- (0 / 18) 0 Ba/La-140 36 15

--- (0 / 18)

--- (0 / 18) 0

a. (f) is the number of positive measurements / total measurements at specified location.

b. These are the ODCM specified LLDs, actual method LLDs will be lower. See Table 4-4.

Reference Appendix A, Tables A-11.1, A-11.2, Tables A-12.1, A-12.2.

TABLE 5-3 QUARTERLY DOSIMETER DATA

SUMMARY

WITH COMPARISON TO PREOPERATIONAL AND OPERATIONAL PERIODS Results in mR/Standard Quarter 2023 Annual Radiological Environmental Operating Report 5-28 Energy Northwest/Columbia Generating Station TABLE 5-3 NOTES: The preoperational period was from 1982 to1983. The operational period started in the 1st quarter 1984.

Station 65 was added in 1997. Stations 119B and 119Ctrl were added in 1995. Stations 121 and 122 were added in 1998. Stations 123-129 and 136A-138A were added in the 2nd quarter of 2002. Stations Site 1 and Site 4 were added in 2006. Stations 58 and 87 to 90 were added in 2008 to monitor remediation work at the DOE 618-11 burial site. Stations 87 and 90 were removed from service in the 1st quarter of 2017. Stations 136A-138A were relocated in the 3rd quarter 2016 and designated as stations 136B-138B.

Stations 155 and 156 were added in the 1st quarter 2016. Stations 130 and 131 were added in the 1st quarter 2017. In 2021, the OSL dosimeters were implemented and the method for calculation was modified.

Pr~ Operalio nal Operational to 2022 2023 Operational

.1at1on Mm Max

.10 uev Mean Min Max

Std LJev Mea11 Min Max stt:1 uev Mean 1

19.16 23.73 2.07 21.90 18.25 33.97 2.33 22.35 23.82 31.05 3.20 28.42 2

17.34 22.81 2.09 21.10 16.43 33.76 2.1 9 21.86 21.65 27.92 2.77 25.62 3

18.25 21.90 1.46 20.42 16.43 30.96 2.1 2 20.98 21.65 28.89

5. 1 26.61) 4 15.51 23.73 2.66 19.96 14.60 33.97 2.57 19.81 20.56 26.85 4.46 26.88 5

18.25 22.81 1.74 20.76 16.43 33.02 2.41 20.29 23.82 27.89 4.74 28.14 6

18.25 21.90 1.50 20.19 16.43 34.91 2.34 20.32 23.82 25.99 3.53 28.89 7

19.16 22.81 1.69 21.33 16.43 35.88 2.56 21.38 25.99 29.48 1.73 28.46 9

21.90 25.55 1.50 23.84 15.51

.59 2.73 23.54 27.08 30.36 5.08 31.32 9

15.51 21.90 2.00 19.85 16.43 34.91 2.52 20.19 22.73 29.48 2.65 25-27 10 19.16 22.81 1.39 20.99 16.43 38.60 2.35 21.19 21.65 27.73 2.77 25.62 11 19.16 22.81 1.39 21.44 16.43 31.83 2.1 1 21.75 24.91 28.61 3.82 29.99 12 20.99 24.64 1.60 23.04 18.25 34.34 2.29 23.35 24.91 29.92 3.43 29.28 13 19.16 22.81 1.54 21.44 17.34 34.73 2.44 21.54 22.S.9 31.24 4.74 27.74 14 19.16 24.64 2.07 21.90 17.34 32.80 2.1 3 21.69 22.73 26.95 4.77 29.03 15 20.99 25.55 1.37 23.15 17.34 37.63 2.34 23.25 25.99 29.99 3.10 29.12 16 20.08 23.73 1.52 22.13 16.43 37.63 2.51 22.16 24.91 29.99 6.82 30.27 17 19.16 23.73 1.62 22.81 17.34 35.70 2.29 22.65 23.8:2 29.99 3.06 29.13 18 20.08 23.73 1.'ll 22.13 16.43 35.70 2.43 22.29 22.73 31.24

4. 1 26.51 19 20.08 23.73 1.24 22.01 17.34 36.66 2.44 22.45 22.73 30.93 3.88 27.93 20 19.16 23.73 1.76 21.44 15.62 33.96 2.38 22.01 25.93 28.99 2.75 29.71) 21 19.16 21.90 1.25 20.68 15.5'1 29.49 1.92 20.44 21.65 29.48 3.24 26.21) 22 19.16 23.73 1.59 22.01 16.43 33.76 2.25 21.91 21.65 27.92 4.70 27.87 23 20.08 23.73 1.49 21.60 17.34 33.99 2.26 21.41 21.65 27.73 5.30 29.91) 24 20.99 23.73 1.09 21.90 16.74 50.50 3.25 22.02 23.82 27.92 2.9'5 29.17 25 20.99 24.64 1.46 23.15 17.34 36.96 2.44 22.99 25.99 29.48 3.39 30.65 40 17.34 21.90 1.70 19.94 15.51 33.02 2.43 20.05 23.82 25.97 1.88 25.91 1

20.08 25.55 2.00 23.73 17.34 34.91 2.68 22.58 23.82 30.97 4.78 29.84 42 20.08 23.73 1.61 22.36 17.34 34.91 2.61 22.03 24.91 27.92 3.17 27.72 43 20.99 24.64 1.49 23.12 16.43 33.02 2.40 22.62 22.73 28.99 3.97 27.58 44 19.16 22.81 1.34 21.12 15.51 33.02 2.52 20.72 25.93 29.92 i.94 27.48 45 19.16 22.81 1.37 21.25 16.43 34.34 2.57 21.33 21.65 28.92 4.82 29.36 46 22.81 29.29 2.10 26.10 19.16

.61 2.59 26.67 30.34 31.99 2.68 33.38

,fl 17.34 20.99 1.73 19.85 15.51 34.91 2.41 20.49 23.8:2 26.96 3.07 27.73 9

21.90 21.90 21.90 16.43 30.86 2.08 22.11 23.82 28.99 3.39 29.42 50 20.08 20.08 20.0B 16.43 31.83 2.17 21.90 24.91 28.61 2.69 29.47 51 19.16 21.90 1.18 20.53 16.43 32.80 2.15 21.19 25.99 28.24 2.24 27.77 53 24.64 24.64 24.64 18.25 34.34 2.60 23.20 23.82 29.97 3.M 29.19 54 23.73 23.73 23.73 18.18 32.43 2.37 22.16 20.56 28.12 4.96 27.21 56 20.99 20.99 20.99 16.43 32.07 2.11 21.65 20.56 27.92 5.05 27.76 56 21.90 21.90 21.90 16.43 37.75 2.46 22.21 22.73 29.48 4.66 29.19 59 17.93 31.83 3.25 20.93 22.73 28.99 3.54 27.68 66 17.73 34.91 2.56 20.42 23.8:2 28.99 3.19 29.21)

TABLE 5-3 (Cont.)

QUARTERLY DOSIMETER DATA

SUMMARY

WITH COMPARISON TO PREOPERATIONAL AND OPERATIONAL PERIODS Results in mR/Standard Quarter 2023 Annual Radiological Environmental Operating Report 5-29 Energy Northwest/Columbia Generating Station lf're-Operalionall Operational to 2022 2023-Operational station Min Max std Dev Mean Min Max Std Dev Mean Min Max std Dev Mean 71(1S}

20.08 22J! 1 1.58 21.90 18.25 37.25 2.94 25.66 29.25 35.25 3.11 32.52 72(2S}

21.90 23.73 0.91 22.81 19.25

J.5.70 2.62 2.59 27.08 32.12 3.22 31.86 73{3S}

20.08 21.90 0.91 20.99 16.43 34.73 2.66 21.96 27.0S 32.12 3.56 31.24 7 4S}

23.?S 24.64 0.53 24.03, 18.25 37.08 2.65 23.64 28.H 32.51 2.99 31.1 2 75{5S}

19.16 21.90 1.39 20.38 15.51 38.52 2.47 22.50 26.95 28.61 2.57 29.1 7 76(6S}

20.99 22.81 0.91 21.90 17.34 32.19 2.37 22.23 25.99 27.92 2.94 29.03 77(7S}

21.90 23.73 0.91 22.81 17.34 34.73 2.16 22.17 22.n 29.25 5.10 29.00 78(8S}

21.90 23.73 1.05 22.51 17.34 34.73 2.27 21.69 23.82 29.48 3.95 28.39 79(9-S}

22.81 23.73 0.53 23.12 17.34

l3.57 2.24 22.05 25.99 27.73 2.47 29.00 80(106}

20.99 22.81 0.91 21.90 16.43 31.2 1 2.30 21.23 21.65 27.73 3.27 26.39 81(11S}

20.08 23.73 1.90 22.20 17.34 32.. BO 2.07 21.65 25.32 28.89 2.84 28.0B 82(12S}

21.90 24.64 1.39 23.42 17.34 36.66 2.43 22.74 19.48 29.96 6.34 29.5B 83{13S}

21.90 23.73 0.91 22.B1 17.34

J.5.55 2.45 22.42 26.95 28.24 2.89 29.21 84(148}

20.99 22.81 1.05 22.20 16.43

J.5.70 2.35 22.49 24.91 29.48 3.40 29.03 85{156}

21.90 24.64 1.58 23.73 16.5B 31.83 2.36 23.29 25.9'9 30.25 3.9'2 30.27 86(165}

21.90 23.73 0.91 22.81 19.25 38.60 2.92 26.79 33.60 35.66 1.74 35.71 87 19.34 34.34 3.68 28.67 32.51 1.54 34.6B 88 17.05 37.08 3.92 26.36 32.51 32.1 2 3.43 35.23 89 19.25 40.9'9 3.95 27.26 33.60 39.56 3.40 36.77 90 16.79 21.02 0.93 18.99 1198 19.24

l3.57 2.58 22.54 2B.H 32.12 4.26 32.94 119Ct~

3.74 36.10 3.63 22.50 31.00 35.25 3.0S 34.36 121 (ISf SI) 19.52 130.27 19.97 7.19 61.79 83.30 15.89 93.25 122 (ISf SI) 19.62 47.30 6.38 32..99 32.51 39.53 4.85 39.34 123 (ISf SI) 24.99 160.33 31.54 103.76 69.24 79.30 6.13 79.12 124 (ISf SI) 26.99 201.05 41.04 125.94 B7.71 94.31 3.99 92.25 125 (ISf SI) 26.46 1:J.5.52 24.51 91.70 72.52 76.43 4.02 77.03 126 (ISf SI) 26.00 145.69 29.40 98.50 99.86 100.32 6.13 107.51 127 (ISf SI) 28.97 109.16 19.15 76.90 82.65 91.76 4.38 98.2B 128 (ISf SI) 25.64 187.25 39.87 116.59 117.08 125.34 5.8.0 122.75 129 (ISf SI) 30.16 138.09 27.26 91.45 101.8.9 109.32 7.19 109.67 130 (ISf SI) 44.04 161.87 39.29 11S.24 104.93 122.60 6.44 114.32 131 (ISf SI) 42.30 99.27 13.44 65.20 88.72 99.27 7.8.7 98.82 136A (ISFSI) 28.99 205.64 60.07 115.48 137A (ISFSI) 29.47 324.49 82.76 139.11 13BA (ISFSI) 28.2B 224.87 63.34 113.66 13.613 (ISFSI) 35.4B 206.85 61.97 140.93 151.52 183.60 21.60 191.67 13713 (ISFSI) 37.52 253.47 68.30 145.39 233.55 253.47 21.33 254.02 13813 (ISFSI) 36.88 210.83 44.68 92.75 186.%

210.83 14.29 206.75 Site 1 11.92 30.96 2.92 19.41 18.39 27.73 5.18 25.76 Site 4 15.70 31.83 3.01 19.54 20.56 27.73 5.58 27.21 155 22.7B 37.63 3.98 27.05 25.9'9 31.63 3.64 31.30 156 24.56 40.53 4.54 30.03 32.51 39.25 1.54 34.68

6.0 QUALITY ASSURANCE AND QUALITY CONTROL

This page is left blank intentionally

2023 Annual Radiological Environmental Operating Report 6-1 Energy Northwest/Columbia Generating Station 6.0 QUALITY ASSURANCE AND QUALITY CONTROL The REMP is designed to meet the quality assurance (QA) and quality control (QC) criteria of the NRC Regulatory Guide 4.15(7) and 10 CFR 50 Appendix B (15). The laboratories performing sample analysis, Energy Northwest Environmental Services and Landauer, maintain quality control programs to ensure that analytical results are accurate, precise, and defendable. The following sections summarize the quality assurance and quality control aspects of the dosimeter, sample collection, and sample analysis components of the REMP.

6.1 Quality Control for the Energy Northwest Environmental Dosimeter Program The Quality Control program for the environmental dosimeter program covers the preparation, transportation, deployment, collection, storage, processing, and evaluation of the environmental dosimeters and is designed to meet the requirements of NRC Regulatory Guides 4.13(8) and 4.15.(7)

From the time the dosimeters are prepared to the time they are placed in the field, they are stored and transported with control dosimeters. Two sets of control dosimeters are used, the building controls and the transportation (trip) controls. The building controls monitor the exposure that the dosimeters receive while being transported to and from the dosimeter vendor and while in storage awaiting deployment and analysis. The trip controls accompany the field dosimeters when transported to and from the vendor and during deployment and collection in the field. The building controls and trip controls are stored in a low background lead shield while the field dosimeters are deployed. If the trip control results are greater than the building control results, the difference between the two is subtracted from the field dosimeters to account for exposure during transit.

Dosimeters designated as spikes are prepared by the Energy Northwest Radiation Protection Department by exposing the dosimeters to a calibrated source to produce a known exposure. The spiked dosimeters are submitted and processed with the field dosimeters to further verify the accuracy and precision of the environmental dosimeter results. Quarterly spikes receive a target exposure in the range of 50 to 150mR.

Evaluation of the 2023 spiked dosimeter results indicated satisfactory agreement for all periods.

There was a consistent high bias for all quarters but it was within acceptable range per ANSI/HPS N13.11-2022. Spiked dosimeter results are presented in Table 6-1.

6.2 Quality Control for the Environmental Sample Program Sample analysis and quality control is performed in accordance with standard operating procedures.

Quality control for the environmental sample program encompasses both the sample collection and sample analysis processes. Results are reviewed for correctness, reasonableness, and data entry errors.

Sample results that are suspect are normally investigated. A crosscheck program utilizing blind samples supplied by an outside vendor is maintained for all sample media routinely analyzed.

6.2.1 Sample Collection Quality Control Duplicate samples are collected and submitted for analysis when practical. The duplicate samples are used to assess the repeatability of the sample collection process and the precision of the analytical method.

2023 Annual Radiological Environmental Operating Report 6-2 Energy Northwest/Columbia Generating Station 6.2.2 Laboratory Instruments Quality Control Analytical Balances - Analytical balances used in the laboratory for sample preparations are calibrated annually. Performance checks are performed prior to use and span the range of intended use. Performance check results are documented on the sample preparation forms and kept with the analytical results.

Analytical Instruments - Analytical instruments used for determining radioactive emissions in samples are calibrated for efficiency annually using standard reference material traceable to the National Institute of Standards and Technology (NIST). Below is a summary of the routine QC practices for the different analytical instruments.

• Gas-flow Proportional Counter: Background and performance checks are performed daily when in use. Control charts are maintained with two and three-sigma limits specified; the checks must fall within the two-sigma warning limits prior to use. Mid-batch QC and end of batch performance checks are typically performed.

• Gamma Spectrometers: Performance checked daily for efficiency, energy per channel relationship, peak resolution, and background when in use. The checks are performed and plotted for both a low and high energy peak. Efficiency checks are held within two-sigma control limits. Long duration background checks are performed quarterly. A low-level batch QC check is typically analyzed with each set of samples.

• Liquid Scintillation Counter: Background and performance checks are performed daily when in use. A performance check standard of the same matrix as the samples is analyzed and results trended. A control chart with acceptance limits specified is maintained. A low-level batch QC check is typically analyzed with each set of samples.

6.2.3 Sample Batch Quality Control Sample batch analysis is normally performed with sample blanks and known-addition samples (or spiked samples) included. The type of known addition sample used is dictated by the sample media being analyzed, the primary analytes of interest, and the method being used. The following is a summary of sample batch QC activities.

Iodine-131 Cartridges - At least one known-addition sample is analyzed with each batch. A charcoal cartridge of the same type used for sample collection but spiked with barium-133 is used. The 356 keV peak of barium-133 serves as a proxy for the 364 keV peak of iodine-131. Samples from the control location serve as blanks.

Gross Beta Filters - At least one unused blank air particulate filter and at least one known-addition air particulate filter is analyzed with each batch.

Aqueous Samples - In most cases, samples collected from the control locations are analyzed as blanks. A known-addition sample is typically analyzed with each batch of samples.

Gross Alpha/Beta in Water - Blank samples are prepared from reagent grade water and analyzed with each batch of samples. One known addition sample and one replicate sample is normally

2023 Annual Radiological Environmental Operating Report 6-3 Energy Northwest/Columbia Generating Station analyzed with each batch.

Tritium in Water - A blank and a low-level known addition sample is typically analyzed with each batch. A replicate sample is prepared and analyzed with each batch when necessary.

6.3 Laboratory Intercomparison Program Participation and Results Participation in cross check intercomparison studies is mandatory for laboratories performing analyses of CGS REMP samples. Intercomparison studies provide a consistent and effective means to evaluate the accuracy and precision of analyses performed by a laboratory. Study results should fall within specified control limits. Results that fall outside the control limits are investigated and corrective action taken.

The Energy Northwest Environmental Services Laboratory participated in three proficiency testing studies involving radioactive measurements provided by Environmental Resource Associates (ERA) during 2023. The Laboratorys intercomparison program was further supplemented by additional cross check media provided by ERA. The Laboratorys intercomparison program results for 2023 are shown in Table 6-2. Participation in the ERA studies serve to meet the intercomparison program requirements specified in the ODCM.

In addition to participation in an intercomparison program, the CGS REMP routinely splits environmental samples with the Washington State Department of Health (WaDOH). Split samples are sent to the WaDOH lab on a scheduled frequency where they are independently analyzed. This split sample program provides an additional check on the accuracy and precision of the results reported in this document.

6.4 Laboratory Quality Control Program Problems and Improvements No issues with REMP sampling and analyses were identified by the QC and intercomparison programs in 2023.

TABLE 6-1 2023 ENVIRONMENTAL SPIKED DOSIMETER RESULTS 2023 Annual Radiological Environmental Operating Report 6-4 Energy Northwest/Columbia Generating Station PERIOD SPIKE ID KNOWN EXPOSURE (mR)

REPORTED EXPOSURE (mR)

BIAS (%)

1st Quarter ENW Spike 150 167.5 11.7 ENW Spike 150 152.4 1.6 ENW Spike 150 174.1 16.1 ENW Spike 50 54.2 9.0 ENW Spike 50 52.4 5.2 ENW Spike 50 56.1 12.8 2nd Quarter ENW Spike 50 53.5 7.1 ENW Spike 50 49.8

-0.5 ENW Spike 50 59.2 18.4 ENW Spike 50 57.3 14.6 ENW Spike 50 48.8

-2.4 ENW Spike 50 53.5 7.1 3rd Quarter ENW Spike 126 137.3 8.9 ENW Spike 126 144.8 14.9 ENW Spike 126 133.5 5.9 ENW Spike 126 134.4 6.7 ENW Spike 126 131.6 4.4 ENW Spike 126 148.6 17.9 4th Quarter ENW Spike 125 132.8 6.2 ENW Spike 125 131.8 5.5 ENW Spike 125 140.3 12.3 ENW Spike 125 129.9 4.0 ENW Spike 125 127.1 1.7 ENW Spike 125 145.0 16.0

TABLE 6-2 ENW REMP PROGRAM CROSS CHECK PERFORMANCE RESULTS 2023 Annual Radiological Environmental Operating Report 6-5 Energy Northwest/Columbia Generating Station ERA MRAD-38 Results Spring 2023 Standard/Analyte Units Reported Value Assigned Value Acceptance Limits Performance Evaluation Air Filter Radionuclides Cesium-134 pCi/Filter 135 153 99.3 - 188 Acceptable Cesium-137 pCi/Filter 1020 892 733 - 1170 Acceptable Cobalt-60 pCi/Filter 489 467 397 - 593 Acceptable Manganese-54 pCi/Filter

< 10

< 35.0 0.00 - 35.0 Acceptable Zinc-65 pCi/Filter 1360 1110 910 - 1700 Acceptable Air Filter Gross Alpha/Beta Gross Alpha pCi/Filter 69 76.8 40.1 - 127 Acceptable Gross Beta pCi/Filter 28 32.8 19.9 - 49.6 Acceptable Water Radionuclides Cesium-134 pCi/L 255 298 225 - 328 Acceptable Cesium-137 pCi/L 742 762 652 - 866 Acceptable Cobalt-60 pCi/L 393 412 355 - 473 Acceptable Manganese-54 pCi/L

< 10

< 71.0 0.00 - 71.0 Acceptable Zinc-65 pCi/L 238 228 203 - 288 Acceptable Water Gross Alpha/Beta Gross Alpha pCi/L 111 148 54.0 - 204 Acceptable Gross Beta pCi/L 120 170 85.0 - 234 Acceptable Water Tritium Tritium pCi/L 29664 28000 21100 - 34100 Acceptable Soil Radionuclides Actinium-228 pCi/kg 1550 1670 1100 - 2100 Acceptable Bismuth-212 pCi/kg 930 1670 478 - 2490 Acceptable Bismuth-214 pCi/kg 538 790 379 - 1180 Acceptable Cesium-134 pCi/kg 895 1170 800 - 1400 Acceptable Cesium-137 pCi/kg 4140 3570 2700 - 4520 Acceptable Cobalt-60 pCi/kg 3800 3490 2750 - 4310 Acceptable Lead-212 pCi/kg 2000 1630 1140 - 2060 Acceptable Lead-214 pCi/kg 711 838 352 - 1320 Acceptable Manganese-54 pCi/kg

< 90

< 555 0.00 - 555 Acceptable Zinc-65 pCi/kg 6700 8340 6660 - 11400 Acceptable

TABLE 6-2 (Cont.)

ENW REMP PROGRAM CROSS CHECK PERFORMANCE RESULTS 2023 Annual Radiological Environmental Operating Report 6-6 Energy Northwest/Columbia Generating Station ERA MRAD-39 Results Fall 2023 Standard/Analyte Units Reported Value Assigned Value Acceptance Limits Performance Evaluation Air Filter Radionuclides Cesium-134 pCi/Filter 260 325 211 - 399 Acceptable Cesium-137 pCi/Filter 834 795 653 - 1040 Acceptable Cobalt-60 pCi/Filter 184 191 162 - 243 Acceptable Zinc-65 pCi/Filter 135 120 98.4 - 183 Acceptable Air Filter Gross Alpha/Beta Gross Alpha pCi/Filter 43.9 55.5 29.0 - 91.4 Acceptable Gross Beta pCi/Filter 87.8 64.8 39.3 - 97.9 Acceptable Water Radionuclides Cesium-134 pCi/L 487 483 365 - 531 Acceptable Cesium-137 pCi/L 1398 1250 1070 - 1420 Acceptable Cobalt-60 pCi/L 1593 1420 1220 - 1630 Acceptable Manganese-54 pCi/L

< 100

< 71.0 0.00 - 71.0 Acceptable Zinc-65 pCi/L 153 122 109 - 154 Acceptable Water Gross Alpha/Beta Gross Alpha pCi/L 44.1 42.7 15.6 - 58.9 Acceptable Gross Beta pCi/L 94.7 111 55.5 - 153 Acceptable Water Tritium Tritium pCi/L 18674.7 18800 14200 - 22900 Acceptable Soil Radionuclides Actinium-228 pCi/kg 1480 1590 1050 - 2000 Acceptable Bismuth-212 pCi/kg 951 1670 478 - 2490 Acceptable Bismuth-214 pCi/kg 710 786 377 - 1170 Acceptable Cesium-134 pCi/kg 1270 1570 1070 - 1880 Acceptable Cesium-137 pCi/kg 1510 1780 1350 - 2250 Acceptable Cobalt-60 pCi/kg 6840 7960 6270 - 9830 Acceptable Lead-212 pCi/kg 1590 1650 1150 - 2090 Acceptable Lead-214 pCi/kg 807 851 357 - 1340 Acceptable Potassium-40 pCi/kg 39100 41800 28800 - 49900 Acceptable Zinc-65 pCi/kg 1850 2030 1620 - 2770 Acceptable

TABLE 6-2 (Cont)

ENW REMP PROGRAM CROSS CHECK PERFORMANCE RESULTS 2023 Annual Radiological Environmental Operating Report 6-7 Energy Northwest/Columbia Generating Station 2023 ERA Crosscheck Result Iodine-131 Charcoal Cartridge Sample ID Analysis Units Reported Value Assigned Value Acceptance Limits Performance Evaluation RAD-134 Iodine-131 pCi/Filter 28 24.4 20.2 - 28.9 Acceptable 2023 ERA RAD Results Iodine-131 in Milk Sample ID Analyte Units Reported Value Assigned Value Acceptance Limits Performance Evaluation RAD-134 Iodine-131 pCi/L 26.8 24.4 20.2 - 28.9 Acceptable

7.0 REFERENCES

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2022 Annual Radiological Environmental Operating Report 7-1 Energy Northwest/Columbia Generating Station

7.0 REFERENCES

1. Energy Northwest, Columbia Generating Station Final Safety Analysis Report, Section 2.3.1.1.

2. Nuclear Regulatory Commission Fact Sheet Fact Sheet on Radiation Monitoring at Nuclear Power Plants and the Tooth Fairy Issue, NRC Library, www.nrc.gov/docs/ML0500/ML050060411.pdf.

3. The National Council on Radiation Protection and Measurements, 2006, Cesium-137 in the Environment: Radioecology and Approaches to Assessment and Management, Report 154, NCRP, Bethesda, MD.

4. U.S. Nuclear Regulatory Commission, "Programs For Monitoring Radioactivity in the Environs of Nuclear Power Plants," Regulatory Guide 4.1, Revision 1, April 1975.

5. U.S. Nuclear Regulatory Commission, "Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Boiling Water Reactors, NUREG-1302, 1991.

6. U.S. Nuclear Regulatory Commission, "An Acceptable Radiological Environmental Monitoring Program," Assessment Branch Technical Position Revision 1, November 1979.

7. U.S. Nuclear Regulatory Commission, "Quality Assurance For Radiological Environmental Monitoring Program (Normal Operations), Effluent Streams and the Environment," Regulatory Guide 4.15, Revision 1, February 1979.

8. U.S. Nuclear Regulatory Commission, "Environmental Dosimetry - Performance Specifications, Testing, and Data Analysis," Regulatory Guide 4.13, Revision 2, June 2019.

9. State of Washington, Energy Facility Site Evaluation Council, Resolution No. 332, approved February 21, 2012.

10. Energy Northwest Nuclear Columbia Generating Station, Operating License NPF-21, Technical Specifications Sections 5.5.1 and 5.6.1

11. Columbia Generating Station Offsite Dose Calculation Manual (ODCM).

12. Washington Administrative Code 173-200-040, "Water Quality Standards for Groundwater of the State of Washington - Criteria."

13. Washington Administrative Code 173-201A, "Water Quality Standards for Surface Waters of the State of Washington."

14. Code of Federal Regulations, Title 10 Part 20, "Standards for Protection against Radiation."

2022 Annual Radiological Environmental Operating Report 7-2 Energy Northwest/Columbia Generating Station

15. Code of Federal Regulations, Title 10 Part 50, "Domestic Licensing of Production and Utilization Facilities."

16. State of Washington, Energy Facility Site Evaluation Council, Resolution No. 300, approved September 10, 2001.

17. Nuclear Energy Institute, Industry Ground Water Protection Initiative - Final Guidance Document, NEI 07-07, Nuclear Energy Institute, 1776 I Street N. W., Suite 400, Washington D.C.

18. State of Washington, Energy Facility Site Evaluation Council, Resolution No. 299, approved August 13, 2001.

19. PNNL, 2007, Summary of Hydrogeology and Evaluation of Existing Groundwater Monitoring Wells for Outfalls 002 and 003 at the Columbia generating Station, PNWD-3845, Pacific Northwest National Laboratory, Richland, WA.

20. Code of Federal Regulations, Title 10 Part 72, Licensing requirements for the independent storage of spent nuclear fuel, high-level radioactive waste, and reactor-related greater than class C waste, Subpart C, 72.44, "License conditions.

21. DOE, 2020, Hanford Site Environmental Report for Calendar Year 2019, DOE/RL-2020-26 Rev 0, US Dept. of Energy, Richland, WA

22. US DOE, 1995, Hanford Site

Background:

Evaluation of Existing Soil Radionuclide Data, DOE/RL-95-55, US Dept. of Energy, Richland, WA.

23. State of Washington, Energy Facility Site Evaluation Council, Council Order No. 874, approved January 21, 2015

24. PNNL, 2007, Summary of Radiological Monitoring of Columbia and Snake River Sediment, 1998 through 2004, PNNL-16990, Pacific Northwest National Laboratory, Richland, WA.

25. ML22004A185 U.S. Nuclear Regulatory Commission Approval for disposal of sediment containing very low levels of radioactive materials from Columbias circulating water system cooling towers and the standby service water system spray ponds into an authorized onsite disposal area 10 CFR 20.2002 ADR Docket No. 50-397

26. American National Standards Institute, Inc., Personnel Dosimetry Performance - Criteria for Testing ANSI/HPS N13.11-2022

8.0 ERRATA

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2022 Annual Radiological Environmental Operating Report 8-1 Energy Northwest/Columbia Generating Station 8.0 ERRATA Errors or omissions identified in previous years reports are identified below.

No Errors were identified in the previous years report.

APPENDIX A 2023 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT COLUMBIA GENERATING STATION DATA TABLES A and B Sample Collection Period Calendar Year 2023 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Prepared by:

Energy Northwest - Environmental Services Staff Richland, WA ENERGY NORTHWEST

i APPENDIX A - TABLE OF CONTENTS TABLE A: ROUTINE RESULTS A-1.1 2022 Quarterly Dosimeter Results A-1.2 2022 Quarterly Dosimeter Results - Summary A-2.1 Gross Beta on Air Particulate Filters A-2.2 Gross Beta on Air Particulate Filters - Summary A-3.1 Gamma Spectrometry Results of Quarterly Air Particulate Filters A-3.2 Gamma Spectrometry Results of Quarterly Air Particulate Filters - Summary A-4.1 Gamma Spectrometry Results of Iodine-131 on Charcoal Filters A-4.2 Gamma Spectrometry Results of Iodine-131 on Charcoal Filters - Summary A-5.1 Gross Beta in Water A-5.2 Gross Beta in Water - Summary A-6.1 Tritium in Water A-6.2 Tritium in Water - Summary A-7.1 Gamma Spectrometry Results of River/Drinking Water A-7.2 Gamma Spectrometry Results of River/Drinking Water - Summary A-8.1 Gamma Spectrometry Results of Soil A-8.2 Gamma Spectrometry Results of Soil - Summary A-9.1 Gamma Spectrometry Results of Sediment A-9.2 Gamma Spectrometry Results of Sediment - Summary A-10.1 Gamma Spectrometry Results of Fish A-10.2 Gamma Spectrometry Results of Fish - Summary A-11.1 Iodine-131 in Milk A-11.2 Iodine-131 in Milk - Summary A-12.1 Gamma Spectrometry Results of Milk A-12.2 Gamma Spectrometry Results of Milk - Summary A-13.1 Gamma Spectrometry Results of Plant Discharge Water A-13.2 Gamma Spectrometry Results of Plant Discharge Water - Summary A-14.1 Gamma Spectrometry Results of Deep Ground Water A 14.2 Gamma Spectrometry Results of Deep Ground Water - Summary A-15.1 Gamma Spectrometry Results of Root Crops A-15.2 Gamma Spectrometry Results of Root Crops - Summary A-16.1 Gamma Spectrometry Results of Fruits

ii APPENDIX A - TABLE OF CONTENTS TABLE A: ROUTINE RESULTS -Cont.

A-16.2 Gamma Spectrometry Results of Fruits - Summary A-17.1 Gamma Spectrometry Results of Vegetables A-17.2 Gamma Spectrometry Results of Vegetables - Summary TABLE B: SPECIAL INTEREST SAMPLE RESULTS B-1.1 2022 Quarterly Special Interest Dosimeter Results B-1.2 2022 Quarterly Special Interest Dosimeter Results - Summary B-2.1 Gamma Spectrometry Results of Storm Drain Water B-2.2 Gamma Spectrometry Results of Storm Drain Water - Summary B-3.1 Gross Beta in Storm Drain Water B-3.2 Gross Beta in Storm Drain Water - Summary B-4.1 Tritium in Storm Drain Water B-4.2 Tritium in Storm Drain Water - Summary B-5.1 Gross Alpha in Sanitary Waste Treatment Water B-5.2 Gross Alpha in Sanitary Waste Treatment Water - Summary B-6.1 Gross Beta in Sanitary Waste Treatment Water B-6.2 Gross Beta in Sanitary Waste Treatment Water - Summary B-7.1 Gamma Spectrometry Results of Sanitary Waste Treatment Water B-7.2 Gamma Spectrometry Results of Sanitary Waste Treatment Water - Summary B-8.1 Tritium in Sanitary Waste Treatment Water B-8.2 Tritium in Sanitary Waste Treatment Water - Summary B-9.1 Gamma Spectrometry Results of CGS Post Disposal Cooling Tower Sediment B-10.1 Gamma Spectrometry Results of Groundwater Monitoring Well Samples B-10.2 Gamma Spectrometry Results of Groundwater Monitoring Well Samples - Summary B-11.1 Tritium in Groundwater Monitoring Well Samples B-12.1 Gamma Spectrometry Results of CGS Evaporation Pond Water B-13.1 Gamma Spectrometry Results of CGS Evaporation Pond Sediment B-14.1 Gross Beta in Evaporation Pond Water B-15.1 Tritium in Evaporation Pond Water B-16.1 Tritium in Snow B-17.1 Carbon-14 in Apples

iii FORWARD Since mid-1984, the results of the REMP analyses have been presented as net results calculated from total counts minus the observed background counts of the detection method. Counting results for low level samples are often within the counting error of the background determination; consequently, results can range from negative to positive values in these samples. Though most of the analytical results presented in this Appendix are below the detection limit, listing the actual calculated value, even when it is negative or below the detection limit, prevents positive biases and loss of individual results inherent in the use of "less than" (<) values. It is recommended practice to report radiological environmental data in this manner.

Most results listed in this Appendix are accompanied by a plus or minus (+) error value. In most cases the error value represents the two sigma counting uncertainty determined for that particular analysis. These error values are in the same units as the listed activity values. The two sigma error value represents the range that a recount of the same sample would be expected to fall within 95%

of the time, based on the statistics encountered in the original count.

Also included in most cases are the analysis specific, minimum detectable activity (MDA) values.

Though similar in concept to the lower limit of detection (LLD), these values are based on the statistics encountered in the specific sample count itself and not a blank determination. As such, they are an a posteriori (after the fact) determination where the LLD is an a priori (before the fact) determination. These values are included as they represent the level of activity that would have been needed to be present in the sample for a positive identification to be made.

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TABLE A-1.1 2023 QUARTERLY DOSIMETER RESULTS Results in milli-Roentgen (mR) per Standard Quarter Station ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Quarterly Sum 1

23.8 31.0 28.8 30.0 113.7 2

21.6 25.9 28.0 26.9 102.5 3

21.6 33.1 22.7 29.0 106.4 4

20.6 31.0 28.0 28.0 107.5 5

23.8 34.1 29.7 24.9 112.6 6

23.8 30.0 29.7 32.0 115.6 7

26.0 30.0 28.8 29.0 113.8 8

27.1 38.2 28.0 32.0 125.3 9

22.7 29.0 24.4 24.9 101.1 10 21.6 26.9 28.0 25.9 102.5 11 24.9 29.0 34.1 28.0 116.0 12 24.9 30.0 33.2 29.0 117.1 13 26.0 25.6 28.0 22.9 102.5 14 22.7 33.1 32.3 28.0 116.1 15 26.0 32.1 31.5 26.9 116.5 16 24.9 40.3 28.0 28.0 121.1 17 23.8 28.1 30.6 30.0 112.5 18 22.7 22.8 31.5 29.0 106.0 19 22.7 32.1 28.0 29.0 111.7 20 27.1 32.1 29.7 25.9 114.8 21 21.6 28.0 26.2 29.0 104.8 22 21.6 28.0 28.8 33.0 111.5 23 21.6 34.1 28.8 31.0 115.6 24 23.8 30.0 28.8 30.0 112.7 25 26.0 34.1 31.5 31.0 122.6 40 23.8 26.9 28.0 24.9 103.6 41 23.8 34.1 31.5 25.9 115.3 42 24.9 32.1 28.0 25.9 110.9 43 22.7 31.0 30.6 25.9 110.3 44 26.0 30.0 28.0 25.9 109.9 45 21.6 33.1 29.7 29.0 113.4 46 30.3 36.2 35.0 32.0 133.5 47 23.8 31.0 27.1 29.0 110.9 49 23.8 29.0 28.8 32.0 113.7 50 24.9 30.0 28.0 31.0 113.9 51 26.0 31.0 27.1 26.9 111.1 53 23.8 33.1 28.8 31.0 116.7 54 20.6 29.0 32.3 26.9 108.9 55 20.6 31.0 31.5 28.0 111.0 56 22.7 34.1 28.0 28.0 112.8 65 23.8 31.0 28.0 30.0 112.8 Page 1 of 2

TABLE A-1.1 2023 QUARTERLY DOSIMETER RESULTS Results in milli-Roentgen (mR) per Standard Quarter Station ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Quarterly Sum 71 29.3 32.1 36.7 32.0 130.1 72 27.1 34.1 33.2 33.0 127.4 73 27.1 35.1 29.7 33.0 125.0 74 28.2 34.1 33.2 29.0 124.5 75 27.1 32.1 30.6 26.9 116.7 76 26.0 31.0 27.1 32.0 116.1 77 22.7 33.1 33.2 26.9 116.0 78 23.8 33.1 29.7 26.9 113.6 79 26.0 31.0 28.0 31.0 116.0 80 21.6 29.0 28.0 26.9 105.5 81 26.0 30.0 25.3 31.0 112.3 82 19.5 34.1 29.7 31.0 114.3 83 27.1 33.1 29.7 26.9 116.8 84 24.9 29.0 33.2 29.0 116.1 85 26.0 34.1 28.0 33.0 121.1 86 33.6 37.2 35.0 37.1 142.8 TABLE A-1.2 2023 QUARTERLY DOSIMETER RESULTS-

SUMMARY

Results in milli-Roentgen (mR) per Standard Quarter Location Average Activity Activity Low Activity High Number of Samples Quarterly Indicator Dosimeters 28.7 19.5 40.3 224 Quarterly Control Dosimeters 25.3 22.7 29.0 4

2nd Q Station 17 was lost and could not be found. The reported quarterly sum for this location is a normalized annual value based on the availabe 3 quarters of data.

Page 2 of 2

Start End Result Error Result Error Result Error 12/27/2022 1/3/2023 4.73E-03

+

4.76E-04 4.20E-03

+

4.41E-04 3.96E-03

+

4.61E-04 1/3/2023 1/10/2023 1.72E-02

+

8.03E-04 1.81E-02

+

8.08E-04 1.63E-02

+

8.23E-04 1/10/2023 1/17/2023 1.21E-02

+

6.83E-04 1.15E-02

+

6.58E-04 1.18E-02

+

6.92E-04 1/17/2023 1/24/2023 1.37E-02

+

7.08E-04 1.17E-02

+

6.60E-04 1.06E-02

+

6.46E-04 1/24/2023 1/31/2023 1.31E-02

+

7.10E-04 1.94E-02

+

8.32E-04 1.36E-02

+

7.25E-04 1/31/2023 2/7/2023 3.05E-02

+

1.06E-03 3.10E-02

+

1.06E-03 2.78E-02

+

1.02E-03 2/7/2023 2/14/2023 1.03E-02

+

6.30E-04 9.06E-03

+

5.96E-04 1.01E-02

+

6.24E-04 2/14/2023 2/21/2023 6.02E-03

+

5.13E-04 4.47E-03

+

4.35E-04 4.22E-03

+

4.42E-04 2/21/2023 2/28/2023 1.78E-02

+

8.28E-04 1.65E-02

+

7.93E-04 1.75E-02

+

8.22E-04 2/28/2023 3/7/2023 8.09E-03

+

5.76E-04 7.37E-03

+

5.67E-04 7.80E-03

+

5.85E-04 3/7/2023 3/14/2023 5.48E-03

+

5.29E-04 6.52E-03

+

5.57E-04 5.93E-03

+

5.48E-04 3/14/2023 3/21/2023 1.98E-02

+

8.79E-04 1.93E-02

+

8.26E-04 1.99E-02

+

8.58E-04 3/21/2023 3/28/2023 1.28E-02

+

7.25E-04 1.16E-02

+

6.82E-04 1.12E-02

+

6.66E-04 3/28/2023 4/4/2023 9.48E-03

+

6.46E-04 9.39E-03

+

6.17E-04 9.41E-03

+

6.36E-04 4/4/2023 4/11/2023 8.53E-03

+

6.08E-04 9.49E-03

+

6.35E-04 9.63E-03

+

6.33E-04 4/11/2023 4/18/2023 7.76E-03

+

5.88E-04 7.79E-03

+

5.81E-04 8.92E-03

+

6.18E-04 4/18/2023 4/25/2023 4.75E-03

+

4.60E-04 6.17E-03

+

5.32E-04 6.09E-03

+

5.30E-04 4/25/2023 5/2/2023 1.56E-02

+

7.73E-04 1.46E-02

+

7.74E-04 1.20E-02

+

6.91E-04 5/2/2023 5/9/2023 8.83E-03

+

6.11E-04 8.57E-03

+

6.31E-04 7.85E-03

+

5.91E-04 5/9/2023 5/16/2023 1.24E-02

+

6.91E-04 1.09E-02

+

6.70E-04 1.08E-02

+

6.68E-04 5/16/2023 5/23/2023 2.00E-02

+

9.09E-04 1.91E-02

+

8.76E-04 1.77E-02

+

8.90E-04 5/23/2023 5/30/2023 1.33E-02

+

6.78E-04 1.40E-02

+

6.94E-04 1.32E-02

+

6.66E-04 5/30/2023 6/6/2023 1.27E-02

+

6.94E-04 1.30E-02

+

6.99E-04 1.10E-02

+

6.60E-04 6/6/2023 6/13/2023 1.12E-02

+

6.67E-04 1.13E-02

+

6.74E-04 1.13E-02

+

6.80E-04 6/13/2023 6/20/2023 7.06E-03

+

5.63E-04 8.66E-03

+

6.04E-04 5.01E-03

+

4.89E-04 6/20/2023 6/27/2023 9.73E-03

+

6.26E-04 9.42E-03

+

6.43E-04 9.53E-03

+

6.34E-04 6/27/2023 7/4/2023 1.46E-02

+

5.27E-04 1.24E-02

+

6.96E-04 1.29E-02

+

6.98E-04 7/4/2023 7/11/2023 9.53E-03

+

8.72E-04 1.57E-02

+

7.87E-04 1.54E-02

+

7.65E-04 7/11/2023 7/18/2023 1.21E-02

+

6.83E-04 1.06E-02

+

6.65E-04 1.14E-02

+

6.59E-04 7/18/2023 7/25/2023 9.50E-03

+

6.15E-04 1.08E-02

+

6.41E-04 9.40E-03

+

6.25E-04 7/25/2023 8/1/2023 9.16E-03

+

6.17E-04 8.34E-03

+

5.72E-04 8.62E-03

+

5.87E-04 8/1/2023 8/8/2023 1.50E-02

+

7.61E-04 1.41E-02

+

7.43E-04 1.35E-02

+

7.62E-04 8/8/2023 8/15/2023 9.41E-03

+

6.18E-04 1.20E-02

+

6.81E-04 1.10E-02

+

6.76E-04 8/15/2023 8/22/2023 1.09E-02

+

5.52E-04 1.27E-02

+

6.44E-04 1.25E-02

+

6.56E-04 8/22/2023 8/29/2023 1.91E-02

+

8.74E-04 1.62E-02

+

7.66E-04 1.46E-02

+

7.25E-04 8/29/2023 9/5/2023 2.00E-02

+

9.09E-04 1.58E-02

+

6.42E-04 1.59E-02

+

7.65E-04 9/5/2023 9/12/2023 1.66E-02

+

8.04E-04 1.72E-02

+

8.15E-04 1.51E-02

+

7.33E-04 9/12/2023 9/19/2023 1.79E-02

+

8.20E-04 1.48E-02

+

7.49E-04 1.53E-02

+

7.62E-04 9/19/2023 9/26/2023 1.50E-02

+

7.56E-04 1.42E-02

+

6.92E-04 1.41E-02

+

7.26E-04 9/26/2023 10/3/2023 9.01E-03

+

6.03E-04 7.78E-03

+

5.75E-04 7.13E-03

+

5.43E-04 10/3/2023 10/10/2023 1.77E-02

+

8.01E-04 1.62E-02

+

7.36E-04 1.65E-02

+

7.90E-04 10/10/2023 10/17/2023 1.21E-02

+

6.94E-04 1.04E-02

+

6.54E-04 1.16E-02

+

6.22E-04 10/17/2023 10/24/2023 2.23E-02

+

8.68E-04 2.21E-02

+

8.72E-04 1.71E-02

+

8.03E-04 10/24/2023 10/31/2023 3.01E-02

+

1.06E-03 3.01E-02

+

1.06E-03 2.96E-02

+

1.05E-03 10/31/2023 11/7/2023 4.62E-02

+

1.33E-03 4.34E-02

+

1.28E-03 3.46E-02

+

1.13E-03 11/7/2023 11/14/2023 1.00E-02

+

6.20E-04 8.65E-03

+

5.91E-04 8.05E-03

+

5.55E-04 11/14/2023 11/21/2023 2.11E-02

+

8.90E-04 2.18E-02

+

9.12E-04 1.94E-02

+

8.56E-04 11/21/2023 11/28/2023 3.10E-02

+

1.07E-03 2.94E-02

+

1.05E-03 2.95E-02

+

1.04E-03 11/28/2023 12/5/2023 4.29E-02

+

1.28E-03 4.04E-02

+

1.25E-03 3.52E-02

+

1.21E-03 12/5/2023 12/12/2023 9.50E-03

+

6.12E-04 9.30E-03

+

6.13E-04 7.52E-03

+

5.55E-04 12/12/2023 12/19/2023 4.48E-02

+

1.32E-03 4.56E-02

+

1.35E-03 4.47E-02

+

1.32E-03 12/19/2023 12/26/2023 3.19E-02

+

1.10E-03 3.45E-02

+

1.16E-03 2.74E-02

+

1.01E-03 Collection Period Station 01 Station 04 Station 05 TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Average MDA 8.91E-4 pCi/m3 Page 1

Start End Result Error Result Error Result Error 12/27/2022 1/3/2023 4.88E-03

+

4.90E-04 4.76E-03

+

4.67E-04 4.70E-03

+

4.94E-04 1/3/2023 1/10/2023 1.86E-02

+

8.48E-04 1.68E-02

+

7.89E-04 1.60E-02

+

1.11E-03 1/10/2023 1/17/2023 1.22E-02

+

6.96E-04 1.11E-02

+

6.45E-04 1.06E-02

+

6.56E-04 1/17/2023 1/24/2023 1.16E-02

+

6.63E-04 1.34E-02

+

6.96E-04 1.07E-02

+

6.77E-04 1/24/2023 1/31/2023 1.95E-02

+

8.54E-04 1.98E-02

+

8.41E-04 1.48E-02

+

7.53E-04 1/31/2023 2/7/2023 3.13E-02

+

1.09E-03 2.94E-02

+

1.03E-03 2.95E-02

+

1.05E-03 2/7/2023 2/14/2023 9.57E-03

+

6.15E-04 1.07E-02

+

6.26E-04 7.37E-03

+

5.44E-04 2/14/2023 2/21/2023 7.22E-03

+

5.33E-04 5.00E-03

+

4.58E-04 4.95E-03

+

4.73E-04 2/21/2023 2/28/2023 1.77E-02

+

8.18E-04 1.83E-02

+

8.12E-04 2.05E-02

+

8.94E-04 2/28/2023 3/7/2023 7.13E-03

+

5.70E-04 8.82E-03

+

5.90E-04 9.63E-03

+

6.35E-04 3/7/2023 3/14/2023 9.10E-03

+

6.22E-04 8.33E-03

+

5.87E-04 7.20E-03

+

5.83E-04 3/14/2023 3/21/2023 1.87E-02

+

8.54E-04 1.98E-02

+

8.44E-04 2.26E-02

+

9.11E-04 3/21/2023 3/28/2023 1.30E-02

+

7.09E-04 1.19E-02

+

6.76E-04 1.24E-02

+

6.86E-04 3/28/2023 4/4/2023 1.19E-02

+

6.84E-04 1.08E-02

+

6.52E-04 9.46E-03

+

6.26E-04 4/4/2023 4/11/2023 1.02E-02

+

6.39E-04 8.31E-03

+

5.77E-04 8.37E-03

+

5.94E-04 4/11/2023 4/18/2023 7.14E-03

+

5.53E-04 6.94E-03

+

5.33E-04 7.43E-03

+

5.62E-04 4/18/2023 4/25/2023 7.79E-03

+

5.86E-04 5.83E-03

+

4.97E-04 6.07E-03

+

5.17E-04 4/25/2023 5/2/2023 1.27E-02

+

7.20E-04 1.34E-02

+

7.15E-04 1.32E-02

+

7.29E-04 5/2/2023 5/9/2023 9.83E-03

+

6.60E-04 8.99E-03

+

6.09E-04 1.01E-02

+

6.53E-04 5/9/2023 5/16/2023 1.17E-02

+

6.69E-04 1.04E-02

+

6.39E-04 1.12E-02

+

6.72E-04 5/16/2023 5/23/2023 2.08E-02

+

9.08E-04 1.97E-02

+

8.74E-04 1.91E-02

+

9.15E-04 5/23/2023 5/30/2023 1.30E-02

+

6.67E-04 1.24E-02

+

7.06E-04 1.41E-02

+

6.87E-04 5/30/2023 6/6/2023 1.26E-02

+

6.51E-04 1.19E-02

+

6.78E-04 1.29E-02

+

7.04E-04 6/6/2023 6/13/2023 1.03E-02

+

6.73E-04 1.32E-02

+

7.17E-04 1.32E-02

+

7.30E-04 6/13/2023 6/20/2023 7.53E-03

+

5.86E-04 7.20E-03

+

5.63E-04 6.87E-03

+

5.25E-04 6/20/2023 6/27/2023 8.91E-03

+

6.23E-04 8.50E-03

+

5.87E-04 1.06E-02

+

6.35E-04 6/27/2023 7/4/2023 1.21E-02

+

6.57E-04 1.36E-02

+

7.17E-04 1.21E-02

+

6.71E-04 7/4/2023 7/11/2023 1.70E-02

+

8.27E-04 1.75E-02

+

8.17E-04 1.71E-02

+

7.97E-04 7/11/2023 7/18/2023 1.26E-02

+

6.96E-04 1.28E-02

+

6.91E-04 1.08E-02

+

6.45E-04 7/18/2023 7/25/2023 1.14E-02

+

6.77E-04 1.05E-02

+

6.37E-04 1.15E-02

+

6.78E-04 7/25/2023 8/1/2023 9.27E-03

+

6.21E-04 9.29E-03

+

6.20E-04 9.74E-03

+

6.21E-04 8/1/2023 8/8/2023 1.54E-02

+

8.00E-04 1.43E-02

+

7.53E-04 1.48E-02

+

7.83E-04 8/8/2023 8/15/2023 9.40E-03

+

6.16E-04 1.18E-02

+

6.97E-04 1.14E-02

+

6.86E-04 8/15/2023 8/22/2023 1.34E-02

+

7.13E-04 1.31E-02

+

6.81E-04 1.48E-02

+

7.23E-04 8/22/2023 8/29/2023 1.76E-02

+

8.02E-04 1.51E-02

+

7.64E-04 1.53E-02

+

7.78E-04 8/29/2023 9/5/2023 1.59E-02

+

8.10E-04 1.62E-02

+

7.54E-04 1.42E-02

+

7.53E-04 9/5/2023 9/12/2023 1.79E-02

+

8.32E-04 1.90E-02

+

8.56E-04 1.82E-02

+

8.45E-04 9/12/2023 9/19/2023 1.85E-02

+

8.39E-04 1.79E-02

+

8.22E-04 1.87E-02

+

8.44E-04 9/19/2023 9/26/2023 1.41E-02

+

7.39E-04 1.49E-02

+

7.52E-04 1.57E-02

+

7.71E-04 9/26/2023 10/3/2023 8.39E-03

+

5.93E-04 7.07E-03

+

5.39E-04 8.72E-03

+

6.05E-04 10/3/2023 10/10/2023 1.62E-02

+

7.45E-04 1.81E-02

+

8.06E-04 1.90E-02

+

8.30E-04 10/10/2023 10/17/2023 1.22E-02

+

7.06E-04 1.20E-02

+

6.45E-04 1.14E-02

+

6.01E-04 10/17/2023 10/24/2023 2.37E-02

+

9.17E-04 2.09E-02

+

8.99E-04 1.97E-02

+

8.31E-04 10/24/2023 10/31/2023 2.87E-02

+

1.03E-03 2.69E-02

+

1.02E-03 3.06E-02

+

1.06E-03 10/31/2023 11/7/2023 4.51E-02

+

1.31E-03 3.92E-02

+

1.26E-03 3.90E-02

+

1.20E-03 11/7/2023 11/14/2023 9.68E-03

+

6.04E-04 8.61E-03

+

5.98E-04 1.02E-02

+

6.07E-04 11/14/2023 11/21/2023 4.18E-03

+

2.81E-04 1.81E-02

+

8.48E-04 1.94E-02

+

8.61E-04 11/21/2023 11/28/2023 3.11E-02

+

1.08E-03 2.68E-02

+

1.03E-03 3.23E-02

+

1.09E-03 11/28/2023 12/5/2023 3.73E-02

+

1.18E-03 3.79E-02

+

1.23E-03 3.79E-02

+

1.20E-03 12/5/2023 12/12/2023 8.80E-03

+

5.86E-04 9.76E-03

+

6.40E-04 7.92E-03

+

5.68E-04 12/12/2023 12/19/2023 4.30E-02

+

1.28E-03 4.08E-02

+

1.28E-03 3.77E-02

+

1.20E-03 12/19/2023 12/26/2023 2.34E-02

+

9.26E-04 2.63E-02

+

9.73E-04 2.52E-02

+

9.70E-04 TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Collection Period Station 06 Station 07 Station 08 Average MDA 8.91E-4 pCi/m3 Page 2

Start End Result Error Result Error Result Error 12/27/2022 1/3/2023 4.57E-03

+

4.82E-04 4.63E-03

+

4.80E-04 4.31E-03

+

4.35E-04 1/3/2023 1/10/2023 1.70E-02

+

8.22E-04 1.89E-02

+

8.47E-04 1.59E-02

+

7.44E-04 1/10/2023 1/17/2023 1.01E-02

+

6.46E-04 1.23E-02

+

6.86E-04 1.00E-02

+

6.04E-04 1/17/2023 1/24/2023 7.45E-03

+

5.58E-04 1.34E-02

+

7.07E-04 1.12E-02

+

6.30E-04 1/24/2023 1/31/2023 1.68E-02

+

8.10E-04 2.00E-02

+

8.59E-04 1.79E-02

+

7.93E-04 1/31/2023 2/7/2023 2.60E-02

+

9.84E-04 2.96E-02

+

1.05E-03 3.04E-02

+

1.03E-03 2/7/2023 2/14/2023 7.26E-03

+

5.41E-04 9.16E-03

+

5.98E-04 8.64E-03

+

5.95E-04 2/14/2023 2/21/2023 4.22E-03

+

4.39E-04 5.19E-03

+

4.74E-04 5.05E-03

+

4.59E-04 2/21/2023 2/28/2023 1.66E-02

+

8.02E-04 1.84E-02

+

8.18E-04 1.87E-02

+

8.31E-04 2/28/2023 3/7/2023 7.75E-03

+

5.80E-04 7.81E-03

+

5.62E-04 8.08E-03

+

5.82E-04 3/7/2023 3/14/2023 7.01E-03

+

5.62E-04 6.58E-03

+

5.53E-04 7.39E-03

+

5.74E-04 3/14/2023 3/21/2023 1.67E-02

+

8.03E-04 2.03E-02

+

8.62E-04 1.93E-02

+

8.56E-04 3/21/2023 3/28/2023 9.63E-03

+

6.27E-04 1.35E-02

+

7.31E-04 1.16E-02

+

6.82E-04 3/28/2023 4/4/2023 8.48E-03

+

6.05E-04 1.08E-02

+

6.50E-04 9.65E-03

+

6.34E-04 4/4/2023 4/11/2023 9.72E-03

+

6.38E-04 9.51E-03

+

6.06E-04 9.32E-03

+

6.14E-04 4/11/2023 4/18/2023 6.63E-03

+

5.35E-04 6.15E-03

+

5.06E-04 7.95E-03

+

5.77E-04 4/18/2023 4/25/2023 6.11E-03

+

5.21E-04 4.89E-03

+

4.67E-04 5.09E-03

+

4.81E-04 4/25/2023 5/2/2023 1.05E-02

+

6.56E-04 1.34E-02

+

7.23E-04 1.45E-02

+

7.51E-04 5/2/2023 5/9/2023 8.53E-03

+

6.14E-04 8.67E-03

+

6.17E-04 8.55E-03

+

6.08E-04 5/9/2023 5/16/2023 1.04E-02

+

6.55E-04 1.25E-02

+

7.09E-04 1.12E-02

+

6.73E-04 5/16/2023 5/23/2023 1.91E-02

+

9.11E-04 2.15E-02

+

9.50E-04 2.12E-02

+

9.42E-04 5/23/2023 5/30/2023 1.22E-02

+

6.75E-04 1.35E-02

+

6.95E-04 1.29E-02

+

6.83E-04 5/30/2023 6/6/2023 1.24E-02

+

6.93E-04 1.27E-02

+

7.07E-04 1.34E-02

+

6.94E-04 6/6/2023 6/13/2023 1.08E-02

+

6.54E-04 1.20E-02

+

7.14E-04 1.21E-02

+

7.08E-04 6/13/2023 6/20/2023 7.89E-03

+

5.88E-04 6.89E-03

+

5.29E-04 6.49E-03

+

5.28E-04 6/20/2023 6/27/2023 8.73E-03

+

6.00E-04 9.58E-03

+

6.08E-04 9.04E-03

+

5.96E-04 6/27/2023 7/4/2023 1.23E-02

+

6.85E-04 1.47E-02

+

7.29E-04 1.62E-02

+

5.40E-04 7/4/2023 7/11/2023 1.57E-02

+

7.73E-04 1.86E-02

+

8.27E-04 1.32E-02

+

6.85E-04 7/11/2023 7/18/2023 1.17E-02

+

6.71E-04 1.29E-02

+

6.84E-04 1.04E-02

+

6.20E-04 7/18/2023 7/25/2023 9.86E-03

+

6.15E-04 1.09E-02

+

6.35E-04 9.74E-03

+

5.99E-04 7/25/2023 8/1/2023 8.55E-03

+

5.99E-04 9.55E-03

+

6.11E-04 9.99E-03

+

6.18E-04 8/1/2023 8/8/2023 1.37E-02

+

7.61E-04 1.45E-02

+

7.38E-04 1.56E-02

+

7.63E-04 8/8/2023 8/15/2023 9.60E-03

+

6.33E-04 1.15E-02

+

6.72E-04 1.05E-02

+

6.45E-04 8/15/2023 8/22/2023 9.45E-03

+

5.57E-04 2.12E-02

+

1.01E-03 1.22E-02

+

5.96E-04 8/22/2023 8/29/2023 1.64E-02

+

8.03E-04 1.84E-02

+

8.15E-04 1.75E-02

+

8.08E-04 8/29/2023 9/5/2023 1.59E-02

+

8.20E-04 1.91E-02

+

8.45E-04 1.57E-02

+

8.12E-04 9/5/2023 9/12/2023 1.86E-02

+

8.41E-04 1.88E-02

+

8.75E-04 1.75E-02

+

8.23E-04 9/12/2023 9/19/2023 1.73E-02

+

7.96E-04 1.89E-02

+

8.36E-04 1.61E-02

+

7.83E-04 9/19/2023 9/26/2023 1.22E-02

+

6.77E-04 1.56E-02

+

7.66E-04 1.52E-02

+

7.65E-04 9/26/2023 10/3/2023 8.98E-03

+

5.86E-04 8.66E-03

+

5.88E-04 8.49E-03

+

5.91E-04 10/3/2023 10/10/2023 1.28E-02

+

6.46E-04 1.97E-02

+

8.38E-04 1.70E-02

+

7.58E-04 10/10/2023 10/17/2023 1.04E-02

+

6.26E-04 8.66E-03

+

1.03E-03 1.26E-02

+

7.12E-04 10/17/2023 10/24/2023 1.93E-02

+

8.44E-04 2.45E-02

+

9.20E-04 2.18E-02

+

8.66E-04 10/24/2023 10/31/2023 2.74E-02

+

1.00E-03 3.14E-02

+

1.09E-03 2.86E-02

+

1.03E-03 10/31/2023 11/7/2023 3.57E-02

+

1.15E-03 4.42E-02

+

1.30E-03 4.30E-02

+

1.29E-03 11/7/2023 11/14/2023 8.96E-03

+

5.77E-04 8.60E-03

+

5.75E-04 8.83E-03

+

5.95E-04 11/14/2023 11/21/2023 2.05E-02

+

8.79E-04 1.89E-02

+

8.41E-04 1.90E-02

+

8.50E-04 11/21/2023 11/28/2023 2.28E-02

+

9.10E-04 2.25E-02

+

9.02E-04 2.81E-02

+

1.02E-03 11/28/2023 12/5/2023 3.97E-02

+

1.22E-03 3.79E-02

+

1.19E-03 3.99E-02

+

1.25E-03 12/5/2023 12/12/2023 8.19E-03

+

5.74E-04 1.35E-02

+

7.13E-04 7.90E-03

+

5.90E-04 12/12/2023 12/19/2023 3.90E-02

+

1.22E-03 4.89E-02

+

1.37E-03 3.79E-02

+

1.26E-03 12/19/2023 12/26/2023 2.39E-02

+

9.40E-04 3.53E-02

+

1.15E-03 3.16E-02

+

1.07E-03 TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Collection Period Station 09 Station 21B Station 23 Average MDA 8.91E-4 pCi/m3 Page 3

Start End Result Error Result Error Result Error 12/27/2022 1/3/2023 3.95E-03

+

4.69E-04 5.55E-03

+

4.92E-04 4.03E-03

+

4.33E-04 1/3/2023 1/10/2023 1.72E-02

+

8.28E-04 1.83E-02

+

8.13E-04 1.69E-02

+

7.67E-04 1/10/2023 1/17/2023 1.09E-02

+

6.71E-04 1.10E-02

+

6.41E-04 1.05E-02

+

6.13E-04 1/17/2023 1/24/2023 1.04E-02

+

6.46E-04 1.19E-02

+

6.55E-04 1.37E-02

+

7.07E-04 1/24/2023 1/31/2023 1.58E-02

+

7.77E-04 1.75E-02

+

7.92E-04 2.16E-02

+

8.91E-04 1/31/2023 2/7/2023 2.80E-02

+

1.00E-03 2.84E-02

+

1.01E-03 2.90E-02

+

1.04E-03 2/7/2023 2/14/2023 9.57E-03

+

6.15E-04 9.58E-03

+

6.01E-04 9.87E-03

+

6.30E-04 2/14/2023 2/21/2023 5.29E-03

+

4.82E-04 6.05E-03

+

4.94E-04 4.70E-03

+

4.49E-04 2/21/2023 2/28/2023 2.01E-02

+

8.65E-04 1.71E-02

+

7.92E-04 1.77E-02

+

7.95E-04 2/28/2023 3/7/2023 8.18E-03

+

5.67E-04 1.01E-02

+

6.21E-04 9.39E-03

+

5.94E-04 3/7/2023 3/14/2023 6.86E-03

+

5.34E-04 7.51E-03

+

5.60E-04 7.69E-03

+

5.72E-04 3/14/2023 3/21/2023 1.91E-02

+

8.29E-04 2.13E-02

+

8.86E-04 1.79E-02

+

8.23E-04 3/21/2023 3/28/2023 1.06E-02

+

6.39E-04 1.06E-02

+

6.40E-04 1.19E-02

+

6.89E-04 3/28/2023 4/4/2023 8.45E-03

+

5.88E-04 9.65E-03

+

6.23E-04 9.27E-03

+

6.17E-04 4/4/2023 4/11/2023 9.45E-03

+

6.08E-04 1.01E-02

+

6.27E-04 8.71E-03

+

5.97E-04 4/11/2023 4/18/2023 6.97E-03

+

5.37E-04 6.97E-03

+

5.29E-04 6.75E-03

+

5.36E-04 4/18/2023 4/25/2023 5.45E-03

+

4.92E-04 6.76E-03

+

5.26E-04 5.65E-03

+

4.96E-04 4/25/2023 5/2/2023 1.22E-02

+

6.96E-04 1.35E-02

+

7.21E-04 1.31E-02

+

7.13E-04 5/2/2023 5/9/2023 8.14E-03

+

5.95E-04 8.00E-03

+

5.79E-04 9.64E-03

+

6.36E-04 5/9/2023 5/16/2023 1.16E-02

+

6.86E-04 1.05E-02

+

6.49E-04 1.13E-02

+

6.64E-04 5/16/2023 5/23/2023 1.85E-02

+

8.94E-04 1.76E-02

+

8.62E-04 1.98E-02

+

9.09E-04 5/23/2023 5/30/2023 1.33E-02

+

6.66E-04 1.44E-02

+

6.98E-04 1.17E-02

+

6.35E-04 5/30/2023 6/6/2023 1.12E-02

+

6.67E-04 1.26E-02

+

6.92E-04 1.17E-02

+

6.35E-04 6/6/2023 6/13/2023 1.19E-02

+

6.93E-04 1.21E-02

+

6.73E-04 1.17E-02

+

6.70E-04 6/13/2023 6/20/2023 5.97E-03

+

5.28E-04 7.28E-03

+

5.56E-04 1.36E-02

+

7.22E-04 6/20/2023 6/27/2023 8.86E-03

+

6.13E-04 1.03E-02

+

6.47E-04 6.46E-03

+

5.46E-04 6/27/2023 7/4/2023 1.22E-02

+

7.03E-04 1.23E-02

+

6.95E-04 9.91E-03

+

6.26E-04 7/4/2023 7/11/2023 1.61E-02

+

8.06E-04 1.91E-02

+

8.58E-04 1.50E-02

+

5.31E-04 7/11/2023 7/18/2023 1.01E-02

+

6.29E-04 1.19E-02

+

6.76E-04 1.20E-02

+

6.71E-04 7/18/2023 7/25/2023 1.05E-02

+

6.58E-04 1.23E-02

+

7.36E-04 1.02E-02

+

6.26E-04 7/25/2023 8/1/2023 9.26E-03

+

6.30E-04 9.35E-03

+

1.44E-03 1.01E-02

+

6.40E-04 8/1/2023 8/8/2023 1.41E-02

+

7.54E-04 1.21E-02

+

7.21E-04 1.29E-02

+

7.17E-04 8/8/2023 8/15/2023 1.16E-02

+

6.83E-04 1.07E-02

+

6.66E-04 1.17E-02

+

6.88E-04 8/15/2023 8/22/2023 1.42E-02

+

6.83E-04 1.24E-02

+

6.64E-04 1.31E-02

+

6.42E-04 8/22/2023 8/29/2023 1.67E-02

+

7.87E-04 1.75E-02

+

8.40E-04 1.65E-02

+

8.05E-04 8/29/2023 9/5/2023 1.23E-02

+

6.98E-04 9.96E-03

+

9.66E-04 1.02E-02

+

7.53E-04 9/5/2023 9/12/2023 1.85E-02

+

8.43E-04 1.65E-02

+

8.02E-04 1.84E-02

+

8.40E-04 9/12/2023 9/19/2023 1.63E-02

+

7.85E-04 1.71E-02

+

8.07E-04 1.75E-02

+

8.04E-04 9/19/2023 9/26/2023 1.59E-02

+

7.74E-04 1.45E-02

+

7.47E-04 1.65E-02

+

7.82E-04 9/26/2023 10/3/2023 8.30E-03

+

5.79E-04 6.44E-03

+

4.91E-04 7.37E-03

+

5.52E-04 10/3/2023 10/10/2023 1.56E-02

+

7.18E-04 1.57E-02

+

7.97E-04 1.78E-02

+

7.97E-04 10/10/2023 10/17/2023 1.07E-02

+

6.45E-04 1.12E-02

+

6.13E-04 1.17E-02

+

6.71E-04 10/17/2023 10/24/2023 1.83E-02

+

8.57E-04 2.03E-02

+

8.75E-04 2.08E-02

+

8.34E-04 10/24/2023 10/31/2023 2.90E-02

+

1.03E-03 2.91E-02

+

1.05E-03 2.80E-02

+

1.02E-03 10/31/2023 11/7/2023 4.04E-02

+

1.22E-03 4.04E-02

+

1.25E-03 4.18E-02

+

1.27E-03 11/7/2023 11/14/2023 8.87E-03

+

5.72E-04 1.02E-02

+

6.31E-04 9.69E-03

+

6.14E-04 11/14/2023 11/21/2023 2.00E-02

+

8.72E-04 1.95E-02

+

8.64E-04 1.94E-02

+

8.58E-04 11/21/2023 11/28/2023 2.89E-02

+

1.04E-03 2.87E-02

+

1.03E-03 3.07E-02

+

1.06E-03 11/28/2023 12/5/2023 3.58E-02

+

1.17E-03 3.53E-02

+

1.16E-03 3.55E-02

+

1.16E-03 12/5/2023 12/12/2023 8.19E-03

+

5.80E-04 6.80E-03

+

5.38E-04 9.05E-03

+

5.93E-04 12/12/2023 12/19/2023 4.50E-02

+

1.36E-03 4.23E-02

+

1.31E-03 4.80E-02

+

1.37E-03 12/19/2023 12/26/2023 2.78E-02

+

1.00E-03 3.10E-02

+

1.09E-03 6.44E-02

+

4.72E-03 TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Collection Period Station 40 Station 48 Station 57 Average MDA 8.91E-4 pCi/m3 Page 4

TABLE A-2.2 GROSS BETA ON AIR PARTICULATE FILTERS -

SUMMARY

Results in pCi per cubic meter LOCATION Average Activity Activity Low Activity High Number of Samples Number of Positive IDs Gross Beta Indicators 1.54E-02

-4.18E-04 6.44E-02 572 572 Gross Beta Controls 1.41E-02 4.22E-03 3.97E-02 52 52 Page 1 of 1

TABLE A-3.1 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS Results in pCi/cubic meter, results decay corrected for decay during sample collection period Location and Quarter Station 1 1st Q 2023 Location and Quarter Station 1 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

6.31E-02

+

1.49E-02 1.36E-02 BE-7

+

1.13E-01

+

1.71E-02 1.01E-02 K-40 1.73E-03

+

1.20E-02 1.63E-02 K-40 9.55E-03

+

7.99E-03 1.03E-02 MN-54

-4.84E-05

+

7.53E-04 1.06E-03 MN-54

-9.71E-05

+

7.61E-04 1.06E-03 FE-59

-1.26E-04

+

4.22E-03 5.81E-03 FE-59

-7.37E-04

+

5.26E-03 7.00E-03 CO-60

-2.09E-04

+

1.03E-03 1.36E-03 CO-60 2.86E-04

+

7.58E-04 1.01E-03 ZN-65

-4.28E-04

+

1.90E-03 2.57E-03 ZN-65

-1.49E-03

+

2.76E-03 3.51E-03 ZRNB-95

-4.24E-04

+

2.20E-03 3.09E-03 ZRNB-95 6.76E-04

+

1.79E-03 2.52E-03 CS-134 1.39E-04

+

5.76E-04 8.34E-04 CS-134

-1.04E-04

+

7.40E-04 1.06E-03 CS-137

-2.16E-04

+

8.55E-04 1.18E-03 CS-137 3.71E-04

+

7.94E-04 1.08E-03 BALA140 4.86E-03

+

1.10E-02 1.46E-02 BALA140 3.07E-03

+

1.81E-02 2.44E-02 RU-106 3.26E-03

+

5.97E-03 8.35E-03 RU-106 3.35E-03

+

6.92E-03 9.68E-03 Location and Quarter Station 1 3rd Q 2023 Location and Quarter Station 1 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.48E-01

+

1.44E-01 1.90E-02 BE-7

+

5.73E-02

+

1.24E-02 1.08E-02 K-40 9.50E-03

+

1.38E-02 1.32E-02 K-40 2.82E-03

+

1.07E-02 1.47E-02 MN-54

-1.93E-05

+

8.19E-04 1.15E-03 MN-54

-5.60E-05

+

9.17E-04 1.26E-03 FE-59

-7.84E-04

+

6.88E-03 9.03E-03 FE-59 1.43E-03

+

1.28E-03 2.11E-03 CO-60 5.81E-04

+

8.34E-04 7.45E-04 CO-60 5.08E-05

+

3.60E-04 4.68E-04 ZN-65 6.35E-04

+

1.81E-03 2.29E-03 ZN-65

-4.12E-04

+

1.82E-03 2.47E-03 ZRNB-95 7.19E-04

+

2.29E-03 3.07E-03 ZRNB-95 8.34E-04

+

1.63E-03 2.24E-03 CS-134

-6.45E-04

+

1.22E-03 1.43E-03 CS-134

-5.55E-04

+

9.12E-04 1.24E-03 CS-137 8.81E-05

+

7.10E-04 1.00E-03 CS-137

-4.78E-04

+

9.59E-04 1.29E-03 BALA140 2.90E-03

+

2.43E-02 3.49E-02 BALA140

-2.56E-04

+

3.70E-03 1.47E-02 RU-106 2.58E-03

+

8.00E-03 1.07E-02 RU-106 3.59E-04

+

6.84E-03 9.98E-03 Location and Quarter Station 4 1st Q 2023 Location and Quarter Station 4 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

7.14E-02

+

1.37E-02 1.01E-02 BE-7

+

1.22E-01

+

1.72E-02 8.86E-03 K-40 3.57E-03

+

9.67E-03 1.33E-02 K-40 1.89E-03

+

1.32E-02 1.77E-02 MN-54

-4.05E-04

+

1.01E-03 1.34E-03 MN-54

-1.99E-05

+

8.42E-04 1.18E-03 FE-59 4.00E-04

+

2.22E-03 2.27E-03 FE-59

-3.09E-03

+

6.26E-03 7.90E-03 CO-60

-6.36E-04

+

1.17E-03 1.46E-03 CO-60

-3.99E-05

+

7.31E-04 1.03E-03 ZN-65

-1.23E-04

+

2.02E-03 2.76E-03 ZN-65 4.15E-04

+

1.70E-03 2.34E-03 ZRNB-95 1.22E-04

+

2.51E-03 3.54E-03 ZRNB-95 1.86E-04

+

1.53E-03 2.28E-03 CS-134

-2.02E-04

+

7.31E-04 1.03E-03 CS-134 2.12E-04

+

6.34E-04 9.03E-04 CS-137

-1.78E-04

+

7.17E-04 1.00E-03 CS-137

-3.79E-04

+

8.37E-04 1.14E-03 BALA140 2.39E-03

+

1.71E-02 2.25E-02 BALA140 4.73E-03

+

1.89E-02 2.50E-02 RU-106

-2.89E-03

+

8.01E-03 1.12E-02 RU-106 6.09E-03

+

5.56E-03 7.18E-03 Location and Quarter Station 4 3rd Q 2023 Location and Quarter Station 4 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.11E-01

+

1.93E-02 1.50E-02 BE-7

+

5.85E-02

+

1.33E-02 1.13E-02 K-40 9.25E-03

+

7.74E-03 9.94E-03 K-40 3.44E-03

+

9.77E-03 1.35E-02 MN-54 3.09E-04

+

7.10E-04 9.62E-04 MN-54

-1.89E-04

+

7.52E-04 1.03E-03 FE-59 5.49E-04

+

4.37E-03 6.11E-03 FE-59 1.27E-03

+

3.38E-03 4.51E-03 CO-60 3.16E-04

+

2.83E-04 4.66E-04 CO-60 4.49E-04

+

3.40E-04 4.73E-04 ZN-65 6.29E-04

+

1.09E-03 1.47E-03 ZN-65

-1.52E-03

+

2.82E-03 3.58E-03 ZRNB-95

-2.01E-04

+

2.50E-03 3.56E-03 ZRNB-95

-2.81E-04

+

2.05E-03 2.90E-03 CS-134

-6.03E-04

+

9.89E-04 1.34E-03 CS-134

-3.74E-04

+

8.34E-04 1.15E-03 CS-137 3.45E-04

+

7.16E-04 9.77E-04 CS-137 2.79E-04

+

5.42E-04 7.50E-04 BALA140 5.81E-03

+

3.43E-02 4.62E-02 BALA140

-9.38E-04

+

1.33E-02 1.77E-02 RU-106

-6.32E-04

+

2.28E-03 9.42E-03 RU-106

-1.81E-03

+

7.41E-03 1.05E-02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/3/23 to 4/4/23 - 2nd Q 4/4/23 to 7/4/23 - 3rd Q 7/4/23 to 10/3/23 - 4th Q 10/3/23 to 1/2/24 Page 1 of 6

TABLE A-3.1 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS Results in pCi/cubic meter, results decay corrected for decay during sample collection period Location and Quarter Station 5 1st Q 2023 Location and Quarter Station 5 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

7.09E-02

+

1.42E-02 1.15E-02 BE-7

+

1.10E-01

+

1.75E-02 1.15E-02 K-40 4.37E-03

+

8.80E-03 1.23E-02 K-40 5.81E-03

+

7.48E-03 1.05E-02 MN-54

-4.02E-04

+

9.96E-04 1.32E-03 MN-54

-1.19E-04

+

8.50E-04 1.18E-03 FE-59

-1.34E-03

+

5.10E-03 6.68E-03 FE-59 5.47E-04

+

4.64E-03 6.30E-03 CO-60 5.28E-05

+

3.74E-04 4.87E-04 CO-60

-2.25E-04

+

9.15E-04 1.22E-03 ZN-65 6.31E-04

+

1.09E-03 1.47E-03 ZN-65 1.55E-04

+

1.66E-03 2.33E-03 ZRNB-95 1.34E-03

+

1.43E-03 1.84E-03 ZRNB-95 1.12E-03

+

1.89E-03 2.57E-03 CS-134

-2.10E-04

+

7.29E-04 1.03E-03 CS-134

-2.11E-04

+

7.63E-04 1.08E-03 CS-137

-6.09E-04

+

1.11E-03 1.47E-03 CS-137 3.37E-05

+

7.72E-04 1.10E-03 BALA140

-8.72E-03

+

2.75E-02 3.41E-02 BALA140 6.29E-03

+

1.42E-02 1.89E-02 RU-106

-2.97E-04

+

5.78E-03 8.61E-03 RU-106

-3.03E-03

+

8.07E-03 1.13E-02 Location and Quarter Station 5 3rd Q 2023 Location and Quarter Station 5 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.35E-01

+

1.32E-01 1.98E-02 BE-7

+

5.43E-02

+

1.02E-02 8.01E-03 K-40 7.05E-03

+

1.21E-02 1.32E-02 K-40 4.52E-03

+

7.20E-03 1.06E-02 MN-54

-8.73E-05

+

8.99E-04 1.23E-03 MN-54 7.66E-05

+

4.64E-04 6.75E-04 FE-59

-5.63E-03

+

1.05E-02 1.11E-02 FE-59

-2.46E-03

+

3.92E-03 5.12E-03 CO-60 2.79E-04

+

7.88E-04 9.88E-04 CO-60

-6.83E-06

+

6.24E-04 9.06E-04 ZN-65 2.55E-05

+

1.62E-03 2.30E-03 ZN-65 1.16E-03

+

1.26E-03 1.60E-03 ZRNB-95

-6.62E-04

+

2.79E-03 3.78E-03 ZRNB-95 4.32E-04

+

1.12E-03 1.63E-03 CS-134

-5.10E-04

+

1.10E-03 1.35E-03 CS-134

-2.26E-04

+

5.30E-04 7.41E-04 CS-137

-4.01E-04

+

1.04E-03 1.31E-03 CS-137

-3.33E-04

+

6.53E-04 9.04E-04 BALA140

-1.14E-02

+

4.87E-02 6.07E-02 BALA140 2.82E-04

+

5.22E-03 8.14E-03 RU-106 2.22E-03

+

7.45E-03 1.01E-02 RU-106 2.41E-03

+

4.32E-03 6.03E-03 Location and Quarter Station 6 1st Q 2023 Location and Quarter Station 6 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

7.12E-02

+

1.37E-02 9.84E-03 BE-7

+

1.16E-01

+

1.67E-02 8.76E-03 K-40 1.34E-03

+

1.38E-02 1.85E-02 K-40 7.61E-03

+

7.65E-03 1.02E-02 MN-54

-2.31E-04

+

3.69E-04 1.06E-03 MN-54 2.14E-04

+

7.00E-04 9.66E-04 FE-59

-1.64E-03

+

5.07E-03 6.59E-03 FE-59

-1.16E-03

+

4.71E-03 6.28E-03 CO-60

-8.57E-04

+

1.32E-03 1.63E-03 CO-60

-5.45E-04

+

1.46E-03 1.84E-03 ZN-65

-6.29E-04

+

2.13E-03 2.83E-03 ZN-65 7.35E-04

+

1.44E-03 1.93E-03 ZRNB-95

-5.75E-04

+

2.36E-03 3.28E-03 ZRNB-95 7.88E-05

+

2.27E-03 3.25E-03 CS-134 2.33E-04

+

4.07E-04 5.77E-04 CS-134

-1.38E-04

+

7.99E-04 1.14E-03 CS-137

-5.27E-04

+

9.99E-04 1.34E-03 CS-137

-1.65E-05

+

6.09E-04 8.90E-04 BALA140

-1.23E-03

+

2.01E-02 2.63E-02 BALA140 1.63E-03

+

1.36E-02 1.96E-02 RU-106 3.57E-03

+

7.74E-03 1.08E-02 RU-106

-5.27E-03

+

9.32E-03 1.28E-02 Location and Quarter Station 6 3rd Q 2023 Location and Quarter Station 6 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.02E-01

+

1.50E-02 8.91E-03 BE-7

+

6.35E-02

+

1.40E-02 1.17E-02 K-40 7.28E-03

+

6.80E-03 9.70E-03 K-40 8.21E-03

+

9.03E-03 1.18E-02 MN-54 1.86E-04

+

3.78E-04 5.36E-04 MN-54

-1.21E-04

+

9.77E-04 1.33E-03 FE-59 2.41E-04

+

3.64E-03 5.29E-03 FE-59 9.30E-04

+

2.47E-03 3.43E-03 CO-60 4.19E-05

+

6.45E-04 9.26E-04 CO-60 1.27E-05

+

4.91E-04 7.47E-04 ZN-65

-8.59E-04

+

1.87E-03 2.48E-03 ZN-65

-1.80E-03

+

2.81E-03 3.54E-03 ZRNB-95

-2.19E-04

+

1.80E-03 2.64E-03 ZRNB-95 6.55E-04

+

1.21E-03 1.70E-03 CS-134

-1.04E-04

+

5.58E-04 7.97E-04 CS-134

-1.01E-04

+

7.74E-04 1.10E-03 CS-137 3.16E-04

+

6.83E-04 9.49E-04 CS-137

-5.33E-04

+

9.42E-04 1.26E-03 BALA140 3.98E-03

+

2.36E-02 3.36E-02 BALA140

-2.96E-03

+

1.63E-02 2.10E-02 RU-106 1.41E-03

+

5.14E-03 7.36E-03 RU-106

-2.15E-03

+

7.57E-03 1.07E-02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/3/23 to 4/4/23 - 2nd Q 4/4/23 to 7/4/23 - 3rd Q 7/4/23 to 10/3/23 - 4th Q 10/3/23 to 1/2/24 Page 2 of 6

TABLE A-3.1 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS Results in pCi/cubic meter, results decay corrected for decay during sample collection period Location and Quarter Station 7 1st Q 2023 Location and Quarter Station 7 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

5.86E-02

+

1.24E-02 1.04E-02 BE-7

+

1.01E-01

+

1.61E-02 1.04E-02 K-40 5.48E-03

+

7.05E-03 9.86E-03 K-40 1.07E-03

+

1.17E-02 1.60E-02 MN-54

-3.14E-04

+

8.78E-04 1.18E-03 MN-54 1.25E-04

+

8.30E-04 1.15E-03 FE-59

-1.81E-04

+

3.32E-03 4.70E-03 FE-59 1.35E-04

+

3.71E-03 5.26E-03 CO-60

-5.48E-04

+

1.23E-03 1.56E-03 CO-60

-3.48E-04

+

9.10E-04 1.19E-03 ZN-65 9.41E-05

+

6.74E-04 8.87E-04 ZN-65 6.24E-04

+

1.08E-03 1.46E-03 ZRNB-95

-7.17E-05

+

2.21E-03 3.14E-03 ZRNB-95

-9.14E-04

+

2.77E-03 3.80E-03 CS-134

-6.61E-05

+

7.33E-04 1.05E-03 CS-134

-3.09E-04

+

7.82E-04 1.09E-03 CS-137 4.78E-04

+

9.99E-04 1.34E-03 CS-137

-2.21E-04

+

7.45E-04 1.03E-03 BALA140

-4.85E-04

+

2.36E-03 8.71E-03 BALA140

-4.88E-03

+

2.35E-02 3.06E-02 RU-106 3.19E-03

+

6.83E-03 9.55E-03 RU-106 2.22E-03

+

6.37E-03 9.08E-03 Location and Quarter Station 7 3rd Q 2023 Location and Quarter Station 7 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.28E-01

+

1.99E-02 1.13E-02 BE-7

+

4.93E-02

+

1.32E-02 1.22E-02 K-40 3.72E-03

+

1.05E-02 1.46E-02 K-40 1.60E-03

+

1.05E-02 1.49E-02 MN-54

-2.35E-04

+

9.29E-04 1.27E-03 MN-54 1.78E-04

+

7.47E-04 1.04E-03 FE-59 3.61E-04

+

2.49E-03 3.17E-03 FE-59

-3.76E-03

+

6.97E-03 8.68E-03 CO-60 3.75E-04

+

6.28E-04 8.24E-04 CO-60 5.39E-04

+

8.67E-04 1.10E-03 ZN-65

-7.02E-04

+

2.37E-03 3.15E-03 ZN-65 5.97E-04

+

1.14E-03 1.57E-03 ZRNB-95 9.81E-04

+

2.20E-03 3.07E-03 ZRNB-95 1.15E-03

+

2.22E-03 3.02E-03 CS-134

-4.86E-04

+

8.95E-04 1.23E-03 CS-134

-2.63E-04

+

8.19E-04 1.15E-03 CS-137 3.81E-04

+

8.36E-04 1.14E-03 CS-137 1.81E-05

+

8.18E-04 1.17E-03 BALA140 1.25E-02

+

2.83E-02 3.77E-02 BALA140

-7.62E-03

+

2.05E-02 2.56E-02 RU-106

-5.54E-03

+

1.01E-02 1.38E-02 RU-106 8.03E-04

+

8.79E-03 1.26E-02 Location and Quarter Station 8 1st Q 2023 Location and Quarter Station 8 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

8.22E-02

+

1.49E-02 1.03E-02 BE-7

+

1.15E-01

+

1.77E-02 1.17E-02 K-40 5.18E-03

+

1.29E-02 1.70E-02 K-40 3.66E-03

+

1.11E-02 1.50E-02 MN-54

-3.64E-04

+

1.02E-03 1.37E-03 MN-54

-4.89E-05

+

7.61E-04 1.07E-03 FE-59 1.12E-03

+

3.80E-03 5.15E-03 FE-59

-2.35E-03

+

6.76E-03 8.63E-03 CO-60 1.50E-04

+

5.62E-04 8.04E-04 CO-60 7.31E-04

+

6.66E-04 7.70E-04 ZN-65 6.58E-04

+

1.76E-03 2.37E-03 ZN-65

-2.05E-04

+

2.31E-03 3.12E-03 ZRNB-95 3.66E-04

+

2.13E-03 3.03E-03 ZRNB-95

-2.66E-05

+

2.12E-03 3.08E-03 CS-134

-4.70E-04

+

9.20E-04 1.27E-03 CS-134

-1.52E-04

+

4.41E-04 1.07E-03 CS-137

-1.38E-04

+

2.49E-04 9.01E-04 CS-137

-4.98E-05

+

7.68E-04 1.09E-03 BALA140 7.60E-03

+

1.22E-02 1.56E-02 BALA140

-8.48E-03

+

2.85E-02 3.62E-02 RU-106

-3.10E-03

+

8.70E-03 1.22E-02 RU-106

-1.12E-03

+

7.46E-03 1.07E-02 Location and Quarter Station 8 3rd Q 2023 Location and Quarter Station 8 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.38E-01

+

1.71E-02 7.74E-03 BE-7

+

5.53E-02

+

9.69E-03 6.20E-03 K-40

+

1.44E-02

+

6.91E-03 8.55E-03 K-40 8.41E-03

+

6.74E-03 9.34E-03 MN-54

-7.42E-06

+

5.91E-04 8.58E-04 MN-54

-1.30E-04

+

6.78E-04 9.45E-04 FE-59 2.42E-04

+

3.65E-03 5.31E-03 FE-59

-1.15E-03

+

3.74E-03 5.07E-03 CO-60

-8.54E-05

+

7.27E-04 1.04E-03 CO-60

-1.28E-04

+

7.00E-04 9.91E-04 ZN-65 2.94E-04

+

1.55E-03 2.15E-03 ZN-65

-1.95E-04

+

1.09E-03 1.56E-03 ZRNB-95 5.50E-04

+

1.58E-03 2.28E-03 ZRNB-95 4.26E-04

+

1.22E-03 1.77E-03 CS-134

-7.81E-05

+

5.80E-04 8.28E-04 CS-134

-7.37E-05

+

5.47E-04 7.81E-04 CS-137 1.58E-04

+

4.81E-04 6.93E-04 CS-137

-4.56E-04

+

8.58E-04 1.17E-03 BALA140

-8.44E-03

+

2.94E-02 4.00E-02 BALA140

-1.30E-03

+

9.34E-03 1.30E-02 RU-106

-3.35E-03

+

6.22E-03 8.59E-03 RU-106 1.05E-03

+

4.65E-03 6.70E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/3/23 to 4/4/23 - 2nd Q 4/4/23 to 7/4/23 - 3rd Q 7/4/23 to 10/3/23 - 4th Q 10/3/23 to 1/2/24 Page 3 of 6

TABLE A-3.1 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS Results in pCi/cubic meter, results decay corrected for decay during sample collection period Location and Quarter Station 9 1st Q 2023 Location and Quarter Station 9 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

6.89E-02

+

1.46E-02 1.28E-02 BE-7

+

1.10E-01

+

1.83E-02 1.28E-02 K-40 2.14E-03

+

9.83E-03 1.38E-02 K-40

-3.39E-04

+

1.07E-02 1.52E-02 MN-54

-3.03E-04

+

9.85E-04 1.32E-03 MN-54 9.89E-06

+

9.04E-04 1.26E-03 FE-59 1.73E-03

+

3.79E-03 4.98E-03 FE-59

-7.69E-04

+

5.48E-03 7.30E-03 CO-60

-1.71E-04

+

7.49E-04 1.03E-03 CO-60 3.96E-05

+

8.85E-04 1.22E-03 ZN-65 4.84E-04

+

1.41E-03 1.94E-03 ZN-65 6.39E-04

+

1.10E-03 1.49E-03 ZRNB-95

-2.53E-05

+

2.02E-03 2.93E-03 ZRNB-95 9.82E-04

+

1.68E-03 2.31E-03 CS-134

-3.50E-04

+

7.72E-04 1.07E-03 CS-134

-2.46E-04

+

7.94E-04 1.12E-03 CS-137

-1.34E-04

+

9.13E-04 1.27E-03 CS-137

-4.61E-04

+

8.88E-04 1.19E-03 BALA140 6.29E-03

+

1.16E-02 1.51E-02 BALA140

-1.72E-03

+

2.00E-02 2.74E-02 RU-106 4.51E-03

+

6.18E-03 8.44E-03 RU-106

-3.79E-04

+

6.44E-03 9.49E-03 Location and Quarter Station 9 3rd Q 2023 Location and Quarter Station 9 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

5.51E-02

+

5.68E-02 2.39E-02 BE-7

+

7.30E-02

+

1.39E-02 1.05E-02 K-40

-7.02E-04

+

1.23E-02 1.69E-02 K-40

-8.17E-04

+

1.12E-02 1.56E-02 MN-54

-2.92E-05

+

6.76E-04 9.68E-04 MN-54 3.95E-04

+

8.22E-04 1.09E-03 FE-59

-1.57E-04

+

5.27E-03 7.25E-03 FE-59 3.19E-03

+

2.91E-03 3.36E-03 CO-60

-5.09E-04

+

1.25E-03 1.47E-03 CO-60

-4.00E-04

+

8.91E-04 1.15E-03 ZN-65 2.30E-04

+

1.38E-03 1.95E-03 ZN-65

-1.03E-03

+

2.24E-03 2.91E-03 ZRNB-95 2.31E-04

+

2.52E-03 3.58E-03 ZRNB-95 1.61E-04

+

2.13E-03 3.02E-03 CS-134

-6.36E-04

+

1.21E-03 1.41E-03 CS-134

-5.45E-04

+

8.97E-04 1.22E-03 CS-137 3.24E-04

+

6.93E-04 8.48E-04 CS-137

-4.62E-04

+

9.50E-04 1.28E-03 BALA140

-8.62E-03

+

3.54E-02 4.57E-02 BALA140 1.90E-03

+

1.12E-02 1.51E-02 RU-106

-1.49E-03

+

8.32E-03 1.17E-02 RU-106

-1.77E-03

+

7.93E-03 1.12E-02 Location and Quarter Station 21B 1st Q 2023 Location and Quarter Station 21B 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

6.89E-02

+

1.46E-02 1.20E-02 BE-7

+

1.24E-01

+

1.87E-02 1.22E-02 K-40 7.67E-03

+

9.04E-03 1.19E-02 K-40 7.72E-03

+

9.10E-03 1.20E-02 MN-54

-1.81E-04

+

8.88E-04 1.21E-03 MN-54

-2.23E-04

+

1.03E-03 1.38E-03 FE-59 1.56E-03

+

2.78E-03 3.68E-03 FE-59

-1.44E-03

+

5.48E-03 7.18E-03 CO-60

-4.49E-04

+

1.15E-03 1.48E-03 CO-60

-2.72E-04

+

1.03E-03 1.35E-03 ZN-65 7.18E-04

+

1.41E-03 1.88E-03 ZN-65

-5.07E-04

+

2.13E-03 2.85E-03 ZRNB-95

-4.19E-04

+

2.17E-03 3.05E-03 ZRNB-95 1.06E-04

+

2.12E-03 3.06E-03 CS-134

-1.02E-04

+

6.67E-04 9.61E-04 CS-134 3.10E-04

+

6.64E-04 9.28E-04 CS-137

-5.18E-04

+

1.04E-03 1.39E-03 CS-137 2.72E-04

+

8.77E-04 1.20E-03 BALA140 6.14E-03

+

1.14E-02 1.48E-02 BALA140

-1.70E-03

+

2.41E-02 3.20E-02 RU-106 2.56E-03

+

6.20E-03 8.79E-03 RU-106 2.23E-03

+

6.54E-03 9.32E-03 Location and Quarter Station 21B 3rd Q 2023 Location and Quarter Station 21B 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.23E-01

+

1.59E-02 7.44E-03 BE-7

+

4.94E-02

+

9.76E-03 7.72E-03 K-40

+

8.40E-03

+

5.92E-03 8.39E-03 K-40 1.81E-03

+

7.51E-03 1.12E-02 MN-54

-2.11E-04

+

7.31E-04 1.01E-03 MN-54

-3.01E-04

+

6.96E-04 9.47E-04 FE-59 1.48E-03

+

1.33E-03 2.19E-03 FE-59

-1.20E-03

+

3.11E-03 4.25E-03 CO-60 7.00E-05

+

5.34E-04 7.85E-04 CO-60 4.24E-04

+

4.70E-04 6.12E-04 ZN-65 1.34E-04

+

1.34E-03 1.91E-03 ZN-65 5.16E-04

+

1.15E-03 1.57E-03 ZRNB-95

-2.16E-04

+

1.64E-03 2.43E-03 ZRNB-95 3.41E-04

+

8.11E-04 1.21E-03 CS-134

-2.30E-04

+

5.61E-04 7.84E-04 CS-134 1.23E-04

+

4.39E-04 6.29E-04 CS-137 1.55E-04

+

3.13E-04 4.54E-04 CS-137 3.05E-04

+

6.29E-04 8.74E-04 BALA140 3.07E-03

+

1.68E-02 2.53E-02 BALA140

-1.58E-03

+

7.71E-03 1.09E-02 RU-106

-2.80E-03

+

5.74E-03 7.97E-03 RU-106

-2.63E-03

+

6.69E-03 9.29E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/3/23 to 4/4/23 - 2nd Q 4/4/23 to 7/4/23 - 3rd Q 7/4/23 to 10/3/23 - 4th Q 10/3/23 to 1/2/24 Page 4 of 6

TABLE A-3.1 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS Results in pCi/cubic meter, results decay corrected for decay during sample collection period Location and Quarter Station 23 1st Q 2023 Location and Quarter Station 23 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

6.15E-02

+

1.29E-02 1.05E-02 BE-7

+

1.22E-01

+

1.73E-02 9.34E-03 K-40 3.16E-03

+

8.21E-03 1.17E-02 K-40 2.10E-03

+

9.63E-03 1.35E-02 MN-54

-4.41E-04

+

1.11E-03 1.47E-03 MN-54

-4.66E-04

+

1.05E-03 1.38E-03 FE-59 1.49E-03

+

4.52E-03 5.96E-03 FE-59 5.50E-04

+

4.67E-03 6.34E-03 CO-60

-5.66E-04

+

1.15E-03 1.45E-03 CO-60 3.24E-04

+

5.76E-04 7.63E-04 ZN-65 1.47E-04

+

1.57E-03 2.21E-03 ZN-65

-1.78E-04

+

1.88E-03 2.59E-03 ZRNB-95 2.76E-04

+

1.67E-03 2.43E-03 ZRNB-95 1.69E-04

+

1.28E-03 1.46E-03 CS-134

-5.03E-04

+

8.31E-04 1.14E-03 CS-134

-5.52E-05

+

3.11E-04 1.02E-03 CS-137 2.78E-04

+

6.71E-04 9.25E-04 CS-137

-2.55E-04

+

8.18E-04 1.13E-03 BALA140

-1.46E-03

+

2.07E-02 2.76E-02 BALA140

-1.70E-03

+

1.98E-02 2.71E-02 RU-106 2.52E-03

+

5.42E-03 7.68E-03 RU-106

-7.44E-04

+

7.71E-03 1.11E-02 Location and Quarter Station 23 3rd Q 2023 Location and Quarter Station 23 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.18E-01

+

1.91E-02 1.32E-02 BE-7

+

6.09E-02

+

1.26E-02 9.37E-03 K-40 7.93E-03

+

8.72E-03 1.14E-02 K-40 2.30E-03

+

8.26E-03 1.19E-02 MN-54 8.48E-05

+

5.77E-04 8.29E-04 MN-54

-1.52E-05

+

1.49E-04 1.03E-03 FE-59

-7.62E-04

+

6.65E-03 8.77E-03 FE-59

-4.10E-04

+

3.96E-03 5.40E-03 CO-60 2.71E-04

+

7.19E-04 9.59E-04 CO-60 8.98E-05

+

7.14E-04 9.97E-04 ZN-65 4.71E-04

+

1.37E-03 1.88E-03 ZN-65 7.35E-05

+

1.80E-03 2.50E-03 ZRNB-95 1.12E-04

+

2.24E-03 3.24E-03 ZRNB-95

-8.02E-04

+

2.38E-03 3.27E-03 CS-134

-1.32E-04

+

6.50E-04 9.32E-04 CS-134

-1.36E-04

+

7.30E-04 1.04E-03 CS-137

-1.09E-04

+

6.61E-04 9.36E-04 CS-137 2.86E-04

+

1.22E-03 1.65E-03 BALA140

-2.65E-05

+

7.89E-03 5.26E-02 BALA140

-9.78E-04

+

1.14E-02 1.55E-02 RU-106 3.24E-03

+

6.06E-03 8.47E-03 RU-106

-7.25E-04

+

8.14E-03 1.17E-02 Location and Quarter Station 40 1st Q 2023 Location and Quarter Station 40 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

6.96E-02

+

1.43E-02 1.11E-02 BE-7

+

1.10E-01

+

1.81E-02 1.31E-02 K-40

-8.36E-04

+

1.15E-02 1.60E-02 K-40

+

1.22E-02

+

8.44E-03 1.03E-02 MN-54 2.96E-04

+

5.25E-04 7.12E-04 MN-54 3.43E-04

+

7.24E-04 9.75E-04 FE-59 9.23E-04

+

5.19E-03 6.88E-03 FE-59 1.18E-03

+

3.99E-03 5.40E-03 CO-60

-2.05E-04

+

1.01E-03 1.34E-03 CO-60 1.05E-04

+

8.87E-04 1.20E-03 ZN-65

-8.00E-04

+

1.93E-03 2.55E-03 ZN-65

-2.82E-04

+

2.50E-03 3.34E-03 ZRNB-95 6.66E-04

+

1.76E-03 2.48E-03 ZRNB-95

-4.56E-05

+

5.98E-04 2.85E-03 CS-134

-1.70E-04

+

6.75E-04 9.63E-04 CS-134 3.48E-05

+

5.66E-04 8.37E-04 CS-137 1.88E-04

+

7.47E-04 1.04E-03 CS-137

-9.97E-05

+

8.95E-04 1.25E-03 BALA140

-1.45E-05

+

2.99E-03 1.80E-02 BALA140

-2.58E-05

+

5.97E-03 2.74E-02 RU-106

-3.30E-03

+

8.06E-03 1.13E-02 RU-106 3.61E-03

+

7.13E-03 9.94E-03 Location and Quarter Station 40 3rd Q 2023 Location and Quarter Station 40 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.37E-01

+

2.17E-02 1.50E-02 BE-7

+

5.17E-02

+

9.70E-03 6.82E-03 K-40 8.94E-03

+

9.22E-03 1.19E-02 K-40 4.96E-03

+

7.23E-03 1.05E-02 MN-54 1.28E-04

+

8.49E-04 1.17E-03 MN-54 3.47E-05

+

5.09E-04 7.41E-04 FE-59 6.39E-04

+

5.42E-03 7.36E-03 FE-59

-2.13E-03

+

4.19E-03 5.52E-03 CO-60

-2.07E-04

+

1.02E-03 1.35E-03 CO-60

-1.78E-04

+

7.19E-04 1.01E-03 ZN-65

-1.32E-03

+

2.64E-03 3.39E-03 ZN-65

-5.24E-04

+

1.71E-03 2.30E-03 ZRNB-95 1.17E-04

+

2.35E-03 3.39E-03 ZRNB-95

-6.94E-04

+

1.66E-03 2.33E-03 CS-134

-2.42E-04

+

6.24E-04 8.83E-04 CS-134 2.50E-05

+

5.31E-04 7.67E-04 CS-137

-5.92E-04

+

1.19E-03 1.59E-03 CS-137 2.41E-04

+

5.57E-04 7.83E-04 BALA140 2.93E-03

+

3.40E-02 4.65E-02 BALA140

-4.68E-03

+

1.13E-02 1.49E-02 RU-106 2.96E-03

+

6.96E-03 9.80E-03 RU-106

-3.29E-03

+

7.04E-03 9.70E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/3/23 to 4/4/23 - 2nd Q 4/4/23 to 7/4/23 - 3rd Q 7/4/23 to 10/3/23 - 4th Q 10/3/23 to 1/2/24 Page 5 of 6

TABLE A-3.1 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS Results in pCi/cubic meter, results decay corrected for decay during sample collection period Location and Quarter Station 48 1st Q 2023 Location and Quarter Station 48 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

6.21E-02

+

1.26E-02 9.15E-03 BE-7

+

1.03E-01

+

1.85E-02 1.43E-02 K-40 4.19E-04

+

1.13E-02 1.55E-02 K-40

+

1.12E-02

+

8.09E-03 1.00E-02 MN-54 5.59E-05

+

8.56E-04 1.19E-03 MN-54 6.66E-05

+

6.66E-04 9.46E-04 FE-59 1.67E-03

+

2.87E-03 3.78E-03 FE-59 1.15E-03

+

3.88E-03 5.25E-03 CO-60

-4.49E-04

+

1.02E-03 1.30E-03 CO-60

-2.79E-04

+

8.86E-04 1.17E-03 ZN-65 4.86E-04

+

2.04E-03 2.73E-03 ZN-65

-7.46E-04

+

2.12E-03 2.79E-03 ZRNB-95

-1.74E-04

+

2.16E-03 3.08E-03 ZRNB-95

-5.19E-05

+

2.24E-03 3.21E-03 CS-134

-4.64E-04

+

8.93E-04 1.23E-03 CS-134

-4.73E-04

+

8.37E-04 1.15E-03 CS-137

-3.41E-04

+

7.38E-04 1.01E-03 CS-137 3.06E-04

+

9.82E-04 1.34E-03 BALA140

-5.84E-03

+

2.13E-02 2.75E-02 BALA140

-1.34E-02

+

3.18E-02 3.95E-02 RU-106 3.93E-03

+

5.97E-03 8.22E-03 RU-106

-3.28E-03

+

7.47E-03 1.04E-02 Location and Quarter Station 48 3rd Q 2023 Location and Quarter Station 48 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

8.70E-02

+

1.71E-02 1.39E-02 BE-7

+

5.41E-02

+

1.24E-02 1.03E-02 K-40 7.62E-03

+

8.99E-03 1.19E-02 K-40 5.18E-03

+

8.76E-03 1.21E-02 MN-54

-5.40E-04

+

1.12E-03 1.47E-03 MN-54 1.91E-04

+

7.59E-04 1.04E-03 FE-59 1.37E-03

+

4.64E-03 6.27E-03 FE-59

-2.36E-03

+

5.36E-03 6.80E-03 CO-60

-2.57E-05

+

8.59E-04 1.18E-03 CO-60 1.04E-04

+

8.78E-04 1.19E-03 ZN-65

-5.17E-05

+

1.89E-03 2.64E-03 ZN-65

-9.15E-04

+

1.93E-03 2.52E-03 ZRNB-95

-5.89E-05

+

2.54E-03 3.65E-03 ZRNB-95

-2.86E-04

+

2.08E-03 2.95E-03 CS-134 3.44E-05

+

6.99E-04 1.01E-03 CS-134

-1.03E-04

+

6.71E-04 9.67E-04 CS-137

-2.60E-04

+

9.68E-04 1.32E-03 CS-137 3.30E-04

+

8.13E-04 1.11E-03 BALA140

-2.63E-05

+

6.70E-03 4.90E-02 BALA140

-3.96E-03

+

1.44E-02 1.87E-02 RU-106 3.37E-03

+

7.69E-03 1.07E-02 RU-106

-1.56E-05

+

2.30E-03 9.35E-03 Location and Quarter Station 57 1st Q 2023 Location and Quarter Station 57 2nd Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

7.83E-02

+

1.60E-02 1.27E-02 BE-7

+

1.09E-01

+

1.67E-02 1.08E-02 K-40 3.77E-03

+

8.29E-03 1.17E-02 K-40 1.78E-04

+

1.44E-02 1.92E-02 MN-54

-5.91E-04

+

1.03E-03 1.34E-03 MN-54 6.95E-04

+

7.60E-04 9.60E-04 FE-59 1.94E-03

+

2.95E-03 3.81E-03 FE-59

-1.37E-04

+

4.59E-03 6.32E-03 CO-60

-1.38E-04

+

9.84E-04 1.31E-03 CO-60

-4.37E-04

+

1.26E-03 1.61E-03 ZN-65

-4.89E-04

+

2.06E-03 2.75E-03 ZN-65 1.11E-03

+

1.50E-03 1.92E-03 ZRNB-95 1.76E-04

+

2.32E-03 3.30E-03 ZRNB-95 3.95E-04

+

1.97E-03 2.81E-03 CS-134

-2.58E-05

+

0.00E+00 8.98E-04 CS-134

-6.25E-04

+

1.02E-03 1.39E-03 CS-137 2.77E-04

+

5.89E-04 8.14E-04 CS-137 3.67E-04

+

6.60E-04 8.97E-04 BALA140 7.36E-03

+

6.59E-03 1.08E-02 BALA140 6.82E-03

+

1.54E-02 2.05E-02 RU-106

-3.73E-03

+

7.84E-03 1.09E-02 RU-106

-1.11E-03

+

5.96E-03 8.70E-03 Location and Quarter Station 57 3rd Q 2023 Location and Quarter Station 57 4th Q 2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.46E-01

+

1.42E-01 1.39E-02 BE-7

+

5.58E-02

+

1.01E-02 6.79E-03 K-40 5.48E-04

+

1.24E-02 1.68E-02 K-40 5.64E-03

+

6.87E-03 1.02E-02 MN-54

-5.42E-04

+

1.13E-03 1.31E-03 MN-54 1.49E-05

+

6.87E-04 9.81E-04 FE-59 3.16E-04

+

6.14E-03 8.26E-03 FE-59 1.87E-04

+

2.82E-03 4.11E-03 CO-60 1.64E-04

+

8.82E-04 1.17E-03 CO-60 4.84E-04

+

6.38E-04 8.35E-04 ZN-65 1.26E-03

+

2.36E-03 2.60E-03 ZN-65

-3.89E-04

+

1.55E-03 2.13E-03 ZRNB-95

-9.55E-04

+

2.91E-03 3.80E-03 ZRNB-95

-4.66E-04

+

1.66E-03 2.38E-03 CS-134

-1.36E-04

+

8.73E-04 1.22E-03 CS-134

-5.38E-05

+

5.73E-04 8.25E-04 CS-137

-2.41E-04

+

9.14E-04 1.21E-03 CS-137 6.47E-05

+

4.79E-04 7.09E-04 BALA140 1.49E-02

+

3.11E-02 3.59E-02 BALA140

-9.47E-04

+

8.32E-03 1.20E-02 RU-106

-5.02E-03

+

1.02E-02 1.23E-02 RU-106

-3.07E-03

+

6.11E-03 8.47E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/3/23 to 4/4/23 - 2nd Q 4/4/23 to 7/4/23 - 3rd Q 7/4/23 to 10/3/23 - 4th Q 10/3/23 to 1/2/24 Page 6 of 6

TABLE A-3.2 GAMMA SPECTROMETRY RESULTS OF QUARTERLY AIR PARTICULATE FILTERS -

SUMMARY

Results in pCi/cubic meter, corrected for decay during collection period Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs BE-7 Ind 9.06E-02 4.93E-02 1.48E-01 1.11E-02 44 44 BE-7 Cntl 7.68E-02 5.51E-02 1.10E-01 1.50E-02 4

4 K-40 Ind 5.28E-03

-8.36E-04 1.44E-02 1.27E-02 44 4

K-40 Cntl 7.09E-05

-8.17E-04 2.14E-03 1.54E-02 4

0 MN-54 Ind

-7.74E-05

-5.91E-04 6.95E-04 1.10E-03 44 0

MN-54 Cntl 1.81E-05

-3.03E-04 3.95E-04 1.16E-03 4

0 FE-59 Ind

-2.54E-04

-5.63E-03 1.94E-03 5.80E-03 44 0

FE-59 Cntl 9.98E-04

-7.69E-04 3.19E-03 5.72E-03 4

0 CO-60 Ind

-2.12E-05

-8.57E-04 7.31E-04 1.07E-03 44 0

CO-60 Cntl

-2.60E-04

-5.09E-04 3.96E-05 1.21E-03 4

0 ZN-65 Ind

-6.81E-05

-1.80E-03 1.26E-03 2.38E-03 44 0

ZN-65 Cntl 8.19E-05

-1.03E-03 6.39E-04 2.07E-03 4

0 ZRNB-95 Ind 1.01E-04

-9.55E-04 1.34E-03 2.81E-03 44 0

ZRNB-95 Cntl 3.37E-04

-2.53E-05 9.82E-04 2.96E-03 4

0 CS-134 Ind

-1.87E-04

-6.45E-04 3.10E-04 1.02E-03 44 0

CS-134 Cntl

-4.44E-04

-6.36E-04

-2.46E-04 1.21E-03 4

0 CS-137 Ind

-3.22E-05

-6.09E-04 4.78E-04 1.09E-03 44 0

CS-137 Cntl

-1.83E-04

-4.62E-04 3.24E-04 1.15E-03 4

0 BALA140 Ind 9.74E-05

-1.34E-02 1.49E-02 2.63E-02 44 0

BALA140 Cntl

-5.40E-04

-8.62E-03 6.29E-03 2.58E-02 4

0 RU-106 Ind

-4.55E-05

-5.54E-03 6.09E-03 9.82E-03 44 0

RU-106 Cntl 2.19E-04

-1.77E-03 4.51E-03 1.02E-02 4

0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-4.1 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS Results in pCi/cubic meter, corrected for decay during collection period Station 1 Station 4 RQ Activity Error MDA RQ Activity Error MDA 12/27/2022 -

1/3/2023

-1.08E-02

+

2.00E-02 2.82E-02

-1.08E-02

+

2.00E-02 2.82E-02 1/3/2023 -

1/10/2023

-2.37E-03

+

1.25E-02 1.90E-02

-2.37E-03

+

1.25E-02 1.90E-02 1/10/2023 -

1/17/2023

-2.50E-03

+

1.74E-02 2.53E-02

-2.50E-03

+

1.74E-02 2.53E-02 1/17/2023 -

1/24/2023 5.31E-03

+

1.73E-02 2.50E-02 5.31E-03

+

1.73E-02 2.50E-02 1/24/2023 -

1/31/2023

-9.01E-04

+

1.37E-02 2.09E-02

-9.01E-04

+

1.37E-02 2.09E-02 1/31/2023 -

2/7/2023 2.82E-03

+

1.06E-02 1.62E-02 2.82E-03

+

1.06E-02 1.62E-02 2/7/2023 -

2/14/2023 3.48E-03

+

1.77E-02 2.57E-02 3.48E-03

+

1.77E-02 2.57E-02 2/14/2023 -

2/21/2023

-3.49E-03

+

1.70E-02 2.46E-02

-3.49E-03

+

1.70E-02 2.46E-02 2/21/2023 -

2/28/2023 4.55E-03

+

1.70E-02 2.46E-02 4.55E-03

+

1.70E-02 2.46E-02 2/28/2023 -

3/7/2023

-4.91E-03

+

1.92E-02 2.78E-02

-4.91E-03

+

1.92E-02 2.78E-02 3/7/2023 -

3/14/2023

-3.30E-03

+

1.23E-02 1.77E-02

-3.30E-03

+

1.23E-02 1.77E-02 3/14/2023 -

3/21/2023 9.41E-04

+

1.80E-02 2.64E-02 9.41E-04

+

1.80E-02 2.64E-02 3/21/2023 -

3/28/2023 2.04E-03

+

1.52E-02 2.24E-02 2.04E-03

+

1.52E-02 2.24E-02 3/28/2023 -

4/4/2023

-2.56E-03

+

1.78E-02 2.59E-02

-2.56E-03

+

1.78E-02 2.59E-02 4/4/2023 -

4/11/2023 6.09E-03

+

1.45E-02 2.09E-02 6.09E-03

+

1.45E-02 2.09E-02 4/11/2023 -

4/18/2023 6.18E-03

+

1.33E-02 1.92E-02 6.18E-03

+

1.33E-02 1.92E-02 4/18/2023 -

4/25/2023 8.56E-03

+

1.56E-02 2.21E-02 8.56E-03

+

1.56E-02 2.21E-02 4/25/2023 -

5/2/2023 4.69E-03

+

1.52E-02 2.21E-02 4.69E-03

+

1.52E-02 2.21E-02 5/2/2023 -

5/9/2023 1.48E-03

+

1.54E-02 2.28E-02 1.48E-03

+

1.54E-02 2.28E-02 5/9/2023 -

5/16/2023

-1.08E-02

+

1.94E-02 2.74E-02

-1.08E-02

+

1.94E-02 2.74E-02 5/16/2023 -

5/23/2023

-1.06E-02

+

1.91E-02 2.69E-02

-1.06E-02

+

1.91E-02 2.69E-02 5/23/2023 -

5/30/2023

-5.90E-03

+

1.80E-02 2.58E-02

-5.90E-03

+

1.80E-02 2.58E-02 5/30/2023 -

6/6/2023 2.02E-03

+

1.50E-02 2.21E-02 2.02E-03

+

1.50E-02 2.21E-02 6/6/2023 -

6/13/2023

-2.68E-04

+

1.62E-02 2.39E-02

-2.68E-04

+

1.62E-02 2.39E-02 6/13/2023 -

6/20/2023

-5.51E-03

+

1.71E-02 2.46E-02

-5.51E-03

+

1.71E-02 2.46E-02 6/20/2023 -

6/27/2023 7.75E-03

+

1.42E-02 2.02E-02 7.75E-03

+

1.42E-02 2.02E-02 6/27/2023 -

7/4/2023 6.31E-03

+

1.39E-02 2.00E-02 6.31E-03

+

1.39E-02 2.00E-02 7/4/2023 -

7/11/2023

-6.34E-03

+

3.72E-02 2.64E-02

-6.34E-03

+

3.72E-02 2.64E-02 7/11/2023 -

7/18/2023

-2.55E-03

+

1.55E-02 2.27E-02

-2.55E-03

+

1.55E-02 2.27E-02 7/18/2023 -

7/25/2023

-9.71E-03

+

2.10E-02 2.96E-02

-9.71E-03

+

2.10E-02 2.96E-02 7/25/2023 -

8/1/2023 4.23E-04

+

1.71E-02 2.52E-02 4.23E-04

+

1.71E-02 2.52E-02 8/1/2023 -

8/8/2023 1.18E-03

+

1.64E-02 2.41E-02 1.18E-03

+

1.64E-02 2.41E-02 8/8/2023 -

8/15/2023 3.33E-03

+

1.72E-02 2.50E-02 3.33E-03

+

1.72E-02 2.50E-02 8/15/2023 -

8/22/2023 6.48E-03

+

1.45E-02 2.08E-02 6.48E-03

+

1.45E-02 2.08E-02 8/22/2023 -

8/29/2023 1.07E-03

+

1.63E-02 2.40E-02 1.07E-03

+

1.63E-02 2.40E-02 8/29/2023 -

9/5/2023 2.55E-03

+

1.69E-02 2.46E-02 2.55E-03

+

1.69E-02 2.46E-02 9/5/2023 -

9/12/2023 6.72E-03

+

1.59E-02 2.28E-02 6.72E-03

+

1.59E-02 2.28E-02 9/12/2023 -

9/19/2023 1.19E-03

+

1.42E-02 2.10E-02 1.19E-03

+

1.42E-02 2.10E-02 9/19/2023 -

9/26/2023

-1.57E-03

+

1.59E-02 2.34E-02

-1.57E-03

+

1.59E-02 2.34E-02 9/26/2023 -

10/3/2023 7.04E-03

+

1.43E-02 2.05E-02 7.04E-03

+

1.43E-02 2.05E-02 10/3/2023 - 10/10/2023

-2.00E-03

+

1.38E-02 2.06E-02

-2.00E-03

+

1.38E-02 2.06E-02 10/10/2023 - 10/17/2023 1.24E-03

+

1.10E-02 1.68E-02 1.24E-03

+

1.10E-02 1.68E-02 10/17/2023 - 10/24/2023

-5.23E-04

+

1.71E-02 2.51E-02

-5.23E-04

+

1.71E-02 2.51E-02 10/24/2023 - 10/31/2023

-5.76E-03

+

2.20E-02 3.14E-02

-5.76E-03

+

2.20E-02 3.14E-02 10/31/2023 -

11/7/2023

-4.96E-03

+

1.66E-02 2.40E-02

-4.96E-03

+

1.66E-02 2.40E-02 11/7/2023 - 11/14/2023 9.59E-03

+

1.25E-02 1.79E-02 9.59E-03

+

1.25E-02 1.79E-02 11/14/2023 - 11/21/2023 8.23E-03

+

1.85E-02 2.62E-02 8.23E-03

+

1.85E-02 2.62E-02 11/21/2023 - 11/28/2023 3.74E-03

+

1.85E-02 2.68E-02 3.74E-03

+

1.85E-02 2.68E-02 11/28/2023 -

12/5/2023 4.71E-03

+

1.43E-02 2.07E-02 4.71E-03

+

1.43E-02 2.07E-02 12/5/2023 - 12/12/2023

-1.34E-04

+

1.66E-02 2.45E-02

-1.34E-04

+

1.66E-02 2.45E-02 12/12/2023 - 12/19/2023 5.06E-03

+

1.42E-02 2.05E-02 5.06E-03

+

1.42E-02 2.05E-02 12/19/2023 - 12/26/2023

-5.15E-03

+

1.95E-02 2.80E-02

-5.15E-03

+

1.95E-02 2.80E-02 Collection Period NVS = Valid sample not obtained due to sampler failure.

RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 6

TABLE A-4.1 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS Results in pCi/cubic meter, corrected for decay during collection period Station 5 Station 6 RQ Activity Error MDA RQ Activity Error MDA 12/27/2022 -

1/3/2023

-1.08E-02

+

2.00E-02 2.82E-02

-1.08E-02

+

2.00E-02 2.82E-02 1/3/2023 -

1/10/2023

-2.37E-03

+

1.25E-02 1.90E-02

-2.37E-03

+

1.25E-02 1.90E-02 1/10/2023 -

1/17/2023

-2.50E-03

+

1.74E-02 2.53E-02

-2.50E-03

+

1.74E-02 2.53E-02 1/17/2023 -

1/24/2023 5.31E-03

+

1.73E-02 2.50E-02 5.31E-03

+

1.73E-02 2.50E-02 1/24/2023 -

1/31/2023

-9.01E-04

+

1.37E-02 2.09E-02

-9.01E-04

+

1.37E-02 2.09E-02 1/31/2023 -

2/7/2023 2.82E-03

+

1.06E-02 1.62E-02 2.82E-03

+

1.06E-02 1.62E-02 2/7/2023 -

2/14/2023 3.48E-03

+

1.77E-02 2.57E-02 3.48E-03

+

1.77E-02 2.57E-02 2/14/2023 -

2/21/2023

-3.49E-03

+

1.70E-02 2.46E-02

-3.49E-03

+

1.70E-02 2.46E-02 2/21/2023 -

2/28/2023 4.55E-03

+

1.70E-02 2.46E-02 4.55E-03

+

1.70E-02 2.46E-02 2/28/2023 -

3/7/2023

-4.91E-03

+

1.92E-02 2.78E-02

-4.91E-03

+

1.92E-02 2.78E-02 3/7/2023 -

3/14/2023

-3.30E-03

+

1.23E-02 1.77E-02

-3.30E-03

+

1.23E-02 1.77E-02 3/14/2023 -

3/21/2023 9.41E-04

+

1.80E-02 2.64E-02 9.41E-04

+

1.80E-02 2.64E-02 3/21/2023 -

3/28/2023 2.04E-03

+

1.52E-02 2.24E-02 2.04E-03

+

1.52E-02 2.24E-02 3/28/2023 -

4/4/2023

-2.56E-03

+

1.78E-02 2.59E-02

-2.56E-03

+

1.78E-02 2.59E-02 4/4/2023 -

4/11/2023 6.09E-03

+

1.45E-02 2.09E-02 6.09E-03

+

1.45E-02 2.09E-02 4/11/2023 -

4/18/2023 6.18E-03

+

1.33E-02 1.92E-02 6.18E-03

+

1.33E-02 1.92E-02 4/18/2023 -

4/25/2023 8.56E-03

+

1.56E-02 2.21E-02 8.56E-03

+

1.56E-02 2.21E-02 4/25/2023 -

5/2/2023 4.69E-03

+

1.52E-02 2.21E-02 4.69E-03

+

1.52E-02 2.21E-02 5/2/2023 -

5/9/2023 1.48E-03

+

1.54E-02 2.28E-02 1.48E-03

+

1.54E-02 2.28E-02 5/9/2023 -

5/16/2023

-1.08E-02

+

1.94E-02 2.74E-02

-1.08E-02

+

1.94E-02 2.74E-02 5/16/2023 -

5/23/2023

-1.06E-02

+

1.91E-02 2.69E-02

-1.06E-02

+

1.91E-02 2.69E-02 5/23/2023 -

5/30/2023

-5.90E-03

+

1.80E-02 2.58E-02

-5.90E-03

+

1.80E-02 2.58E-02 5/30/2023 -

6/6/2023 2.02E-03

+

1.50E-02 2.21E-02 2.02E-03

+

1.50E-02 2.21E-02 6/6/2023 -

6/13/2023

-2.68E-04

+

1.62E-02 2.39E-02

-2.68E-04

+

1.62E-02 2.39E-02 6/13/2023 -

6/20/2023

-5.51E-03

+

1.71E-02 2.46E-02

-5.51E-03

+

1.71E-02 2.46E-02 6/20/2023 -

6/27/2023 7.75E-03

+

1.42E-02 2.02E-02 7.75E-03

+

1.42E-02 2.02E-02 6/27/2023 -

7/4/2023 6.31E-03

+

1.39E-02 2.00E-02 6.31E-03

+

1.39E-02 2.00E-02 7/4/2023 -

7/11/2023

-6.34E-03

+

3.72E-02 2.64E-02

-6.34E-03

+

3.72E-02 2.64E-02 7/11/2023 -

7/18/2023

-2.55E-03

+

1.55E-02 2.27E-02

-2.55E-03

+

1.55E-02 2.27E-02 7/18/2023 -

7/25/2023

-9.71E-03

+

2.10E-02 2.96E-02

-9.71E-03

+

2.10E-02 2.96E-02 7/25/2023 -

8/1/2023 4.23E-04

+

1.71E-02 2.52E-02 4.23E-04

+

1.71E-02 2.52E-02 8/1/2023 -

8/8/2023 1.18E-03

+

1.64E-02 2.41E-02 1.18E-03

+

1.64E-02 2.41E-02 8/8/2023 -

8/15/2023 3.33E-03

+

1.72E-02 2.50E-02 3.33E-03

+

1.72E-02 2.50E-02 8/15/2023 -

8/22/2023 6.48E-03

+

1.45E-02 2.08E-02 6.48E-03

+

1.45E-02 2.08E-02 8/22/2023 -

8/29/2023 1.07E-03

+

1.63E-02 2.40E-02 1.07E-03

+

1.63E-02 2.40E-02 8/29/2023 -

9/5/2023 2.55E-03

+

1.69E-02 2.46E-02 2.55E-03

+

1.69E-02 2.46E-02 9/5/2023 -

9/12/2023 6.72E-03

+

1.59E-02 2.28E-02 6.72E-03

+

1.59E-02 2.28E-02 9/12/2023 -

9/19/2023 1.19E-03

+

1.42E-02 2.10E-02 1.19E-03

+

1.42E-02 2.10E-02 9/19/2023 -

9/26/2023

-1.57E-03

+

1.59E-02 2.34E-02

-1.57E-03

+

1.59E-02 2.34E-02 9/26/2023 -

10/3/2023 7.04E-03

+

1.43E-02 2.05E-02 7.04E-03

+

1.43E-02 2.05E-02 10/3/2023 - 10/10/2023

-2.00E-03

+

1.38E-02 2.06E-02

-2.00E-03

+

1.38E-02 2.06E-02 10/10/2023 - 10/17/2023 1.24E-03

+

1.10E-02 1.68E-02 1.24E-03

+

1.10E-02 1.68E-02 10/17/2023 - 10/24/2023

-5.23E-04

+

1.71E-02 2.51E-02

-5.23E-04

+

1.71E-02 2.51E-02 10/24/2023 - 10/31/2023

-5.76E-03

+

2.20E-02 3.14E-02

-5.76E-03

+

2.20E-02 3.14E-02 10/31/2023 -

11/7/2023

-4.96E-03

+

1.66E-02 2.40E-02

-4.96E-03

+

1.66E-02 2.40E-02 11/7/2023 - 11/14/2023 9.59E-03

+

1.25E-02 1.79E-02 9.59E-03

+

1.25E-02 1.79E-02 11/14/2023 - 11/21/2023 8.23E-03

+

1.85E-02 2.62E-02 8.23E-03

+

1.85E-02 2.62E-02 11/21/2023 - 11/28/2023 3.74E-03

+

1.85E-02 2.68E-02 3.74E-03

+

1.85E-02 2.68E-02 11/28/2023 -

12/5/2023 4.71E-03

+

1.43E-02 2.07E-02 4.71E-03

+

1.43E-02 2.07E-02 12/5/2023 - 12/12/2023

-1.34E-04

+

1.66E-02 2.45E-02

-1.34E-04

+

1.66E-02 2.45E-02 12/12/2023 - 12/19/2023 5.06E-03

+

1.42E-02 2.05E-02 5.06E-03

+

1.42E-02 2.05E-02 12/19/2023 - 12/26/2023

-5.15E-03

+

1.95E-02 2.80E-02

-5.15E-03

+

1.95E-02 2.80E-02 Collection Period NVS = Valid sample not obtained due to sampler failure.

RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 6

TABLE A-4.1 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS Results in pCi/cubic meter, corrected for decay during collection period Station 7 Station 8 RQ Activity Error MDA RQ Activity Error MDA 12/27/2022 -

1/3/2023 3.38E-03

+

1.52E-02 2.22E-02 3.38E-03

+

1.52E-02 2.22E-02 1/3/2023 -

1/10/2023 7.66E-03

+

1.40E-02 2.00E-02 7.66E-03

+

1.40E-02 2.00E-02 1/10/2023 -

1/17/2023

-9.64E-03

+

1.84E-02 2.59E-02

-9.64E-03

+

1.84E-02 2.59E-02 1/17/2023 -

1/24/2023 7.53E-03

+

1.60E-02 2.28E-02 7.53E-03

+

1.60E-02 2.28E-02 1/24/2023 -

1/31/2023 5.39E-03

+

1.84E-02 2.65E-02 5.39E-03

+

1.84E-02 2.65E-02 1/31/2023 -

2/7/2023

-5.89E-03

+

1.36E-02 2.01E-02

-5.89E-03

+

1.36E-02 2.01E-02 2/7/2023 -

2/14/2023 1.13E-02

+

1.28E-02 1.76E-02 1.13E-02

+

1.28E-02 1.76E-02 2/14/2023 -

2/21/2023

-7.15E-03

+

1.86E-02 2.65E-02

-7.15E-03

+

1.86E-02 2.65E-02 2/21/2023 -

2/28/2023 5.38E-04

+

1.67E-02 2.47E-02 5.38E-04

+

1.67E-02 2.47E-02 2/28/2023 -

3/7/2023

-5.81E-03

+

1.90E-02 2.73E-02

-5.81E-03

+

1.90E-02 2.73E-02 3/7/2023 -

3/14/2023

-3.58E-03

+

1.85E-02 2.69E-02

-3.58E-03

+

1.85E-02 2.69E-02 3/14/2023 -

3/21/2023

-1.11E-02

+

2.00E-02 2.81E-02

-1.11E-02

+

2.00E-02 2.81E-02 3/21/2023 -

3/28/2023

-3.00E-03

+

1.80E-02 2.62E-02

-3.00E-03

+

1.80E-02 2.62E-02 3/28/2023 -

4/4/2023

-2.56E-03

+

1.78E-02 2.59E-02

-2.56E-03

+

1.78E-02 2.59E-02 4/4/2023 -

4/11/2023 3.14E-03

+

1.44E-02 2.12E-02 3.14E-03

+

1.44E-02 2.12E-02 4/11/2023 -

4/18/2023

-9.44E-04

+

1.64E-02 2.41E-02

-9.44E-04

+

1.64E-02 2.41E-02 4/18/2023 -

4/25/2023

-7.40E-03

+

1.97E-02 2.81E-02

-7.40E-03

+

1.97E-02 2.81E-02 4/25/2023 -

5/2/2023

-6.62E-03

+

1.81E-02 2.60E-02

-6.62E-03

+

1.81E-02 2.60E-02 5/2/2023 -

5/9/2023 4.78E-03

+

1.55E-02 2.25E-02 4.78E-03

+

1.55E-02 2.25E-02 5/9/2023 -

5/16/2023

-6.19E-03

+

1.92E-02 2.75E-02

-6.19E-03

+

1.92E-02 2.75E-02 5/16/2023 -

5/23/2023

-6.23E-03

+

1.73E-02 2.49E-02

-6.23E-03

+

1.73E-02 2.49E-02 5/23/2023 -

5/30/2023 3.10E-03

+

1.65E-02 2.41E-02 3.10E-03

+

1.65E-02 2.41E-02 5/30/2023 -

6/6/2023

-2.30E-03

+

1.65E-02 2.42E-02

-2.30E-03

+

1.65E-02 2.42E-02 6/6/2023 -

6/13/2023 4.70E-03

+

1.52E-02 2.21E-02 4.70E-03

+

1.52E-02 2.21E-02 6/13/2023 -

6/20/2023

-1.89E-03

+

1.78E-02 2.59E-02

-1.89E-03

+

1.78E-02 2.59E-02 6/20/2023 -

6/27/2023

-1.43E-04

+

1.78E-02 2.62E-02

-1.43E-04

+

1.78E-02 2.62E-02 6/27/2023 -

7/4/2023 6.31E-03

+

1.39E-02 2.00E-02 6.31E-03

+

1.39E-02 2.00E-02 7/4/2023 -

7/11/2023 9.43E-04

+

1.59E-02 2.35E-02 9.43E-04

+

1.59E-02 2.35E-02 7/11/2023 -

7/18/2023 5.52E-03

+

1.33E-02 1.92E-02 5.52E-03

+

1.33E-02 1.92E-02 7/18/2023 -

7/25/2023 6.45E-03

+

1.59E-02 2.28E-02 6.45E-03

+

1.59E-02 2.28E-02 7/25/2023 -

8/1/2023

-7.25E-04

+

1.85E-02 2.73E-02

-7.25E-04

+

1.85E-02 2.73E-02 8/1/2023 -

8/8/2023

-6.32E-03

+

1.81E-02 2.58E-02

-6.32E-03

+

1.81E-02 2.58E-02 8/8/2023 -

8/15/2023 0.00E+00

+

3.37E-03 2.51E-02 0.00E+00

+

3.37E-03 2.51E-02 8/15/2023 -

8/22/2023

-6.01E-03

+

1.78E-02 2.56E-02

-6.01E-03

+

1.78E-02 2.56E-02 8/22/2023 -

8/29/2023

-8.08E-04

+

1.89E-02 2.76E-02

-8.08E-04

+

1.89E-02 2.76E-02 8/29/2023 -

9/5/2023

-5.52E-03

+

1.72E-02 2.47E-02

-5.52E-03

+

1.72E-02 2.47E-02 9/5/2023 -

9/12/2023 6.75E-03

+

1.55E-02 2.22E-02 6.75E-03

+

1.55E-02 2.22E-02 9/12/2023 -

9/19/2023

-3.31E-03

+

1.71E-02 2.49E-02

-3.31E-03

+

1.71E-02 2.49E-02 9/19/2023 -

9/26/2023 3.55E-03

+

1.57E-02 2.29E-02 3.55E-03

+

1.57E-02 2.29E-02 9/26/2023 -

10/3/2023 3.61E-03

+

1.60E-02 2.33E-02 3.61E-03

+

1.60E-02 2.33E-02 10/3/2023 - 10/10/2023 5.57E-04

+

1.15E-02 1.77E-02 5.57E-04

+

1.15E-02 1.77E-02 10/10/2023 - 10/17/2023

-5.56E-03

+

1.43E-02 1.96E-02

-5.56E-03

+

1.43E-02 1.96E-02 10/17/2023 - 10/24/2023

-2.93E-03

+

1.26E-02 1.90E-02

-2.93E-03

+

1.26E-02 1.90E-02 10/24/2023 - 10/31/2023

-4.95E-03

+

1.47E-02 2.18E-02

-4.95E-03

+

1.47E-02 2.18E-02 10/31/2023 -

11/7/2023

-8.06E-03

+

1.49E-02 2.18E-02

-8.06E-03

+

1.49E-02 2.18E-02 11/7/2023 - 11/14/2023 9.18E-03

+

1.48E-02 2.09E-02 9.18E-03

+

1.48E-02 2.09E-02 11/14/2023 - 11/21/2023 2.25E-03

+

1.18E-02 1.79E-02 2.25E-03

+

1.18E-02 1.79E-02 11/21/2023 - 11/28/2023 1.35E-03

+

1.20E-02 1.84E-02 1.35E-03

+

1.20E-02 1.84E-02 11/28/2023 -

12/5/2023 5.84E-03

+

1.10E-02 1.62E-02 5.84E-03

+

1.10E-02 1.62E-02 12/5/2023 - 12/12/2023 4.27E-03

+

1.16E-02 1.73E-02 4.27E-03

+

1.16E-02 1.73E-02 12/12/2023 - 12/19/2023 3.13E-03

+

1.32E-02 1.98E-02 3.13E-03

+

1.32E-02 1.98E-02 12/19/2023 - 12/26/2023 1.06E-03

+

1.82E-02 2.66E-02 1.06E-03

+

1.82E-02 2.66E-02 Collection Period NVS = Valid sample not obtained due to sampler failure.

RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 3 of 6

TABLE A-4.1 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS Results in pCi/cubic meter, corrected for decay during collection period Station 9 RQ Activity Error MDA RQ Activity Error MDA 12/27/2022 -

1/3/2023 3.38E-03

+

1.52E-02 2.22E-02 3.38E-03

+

1.52E-02 2.22E-02 1/3/2023 -

1/10/2023 7.66E-03

+

1.40E-02 2.00E-02 7.66E-03

+

1.40E-02 2.00E-02 1/10/2023 -

1/17/2023

-9.64E-03

+

1.84E-02 2.59E-02

-9.64E-03

+

1.84E-02 2.59E-02 1/17/2023 -

1/24/2023 7.53E-03

+

1.60E-02 2.28E-02 7.53E-03

+

1.60E-02 2.28E-02 1/24/2023 -

1/31/2023 5.39E-03

+

1.84E-02 2.65E-02 5.39E-03

+

1.84E-02 2.65E-02 1/31/2023 -

2/7/2023

-5.89E-03

+

1.36E-02 2.01E-02

-5.89E-03

+

1.36E-02 2.01E-02 2/7/2023 -

2/14/2023 1.13E-02

+

1.28E-02 1.76E-02 1.13E-02

+

1.28E-02 1.76E-02 2/14/2023 -

2/21/2023

-7.15E-03

+

1.86E-02 2.65E-02

-7.15E-03

+

1.86E-02 2.65E-02 2/21/2023 -

2/28/2023 5.38E-04

+

1.67E-02 2.47E-02 5.38E-04

+

1.67E-02 2.47E-02 2/28/2023 -

3/7/2023

-5.81E-03

+

1.90E-02 2.73E-02

-5.81E-03

+

1.90E-02 2.73E-02 3/7/2023 -

3/14/2023

-3.58E-03

+

1.85E-02 2.69E-02

-3.58E-03

+

1.85E-02 2.69E-02 3/14/2023 -

3/21/2023

-1.11E-02

+

2.00E-02 2.81E-02

-1.11E-02

+

2.00E-02 2.81E-02 3/21/2023 -

3/28/2023

-3.00E-03

+

1.80E-02 2.62E-02

-3.00E-03

+

1.80E-02 2.62E-02 3/28/2023 -

4/4/2023

-2.56E-03

+

1.78E-02 2.59E-02

-2.56E-03

+

1.78E-02 2.59E-02 4/4/2023 -

4/11/2023 3.14E-03

+

1.44E-02 2.12E-02 3.14E-03

+

1.44E-02 2.12E-02 4/11/2023 -

4/18/2023

-9.44E-04

+

1.64E-02 2.41E-02

-9.44E-04

+

1.64E-02 2.41E-02 4/18/2023 -

4/25/2023

-7.40E-03

+

1.97E-02 2.81E-02

-7.40E-03

+

1.97E-02 2.81E-02 4/25/2023 -

5/2/2023

-6.62E-03

+

1.81E-02 2.60E-02

-6.62E-03

+

1.81E-02 2.60E-02 5/2/2023 -

5/9/2023 4.78E-03

+

1.55E-02 2.25E-02 4.78E-03

+

1.55E-02 2.25E-02 5/9/2023 -

5/16/2023

-6.19E-03

+

1.92E-02 2.75E-02

-6.19E-03

+

1.92E-02 2.75E-02 5/16/2023 -

5/23/2023

-6.23E-03

+

1.73E-02 2.49E-02

-6.23E-03

+

1.73E-02 2.49E-02 5/23/2023 -

5/30/2023 3.10E-03

+

1.65E-02 2.41E-02 3.10E-03

+

1.65E-02 2.41E-02 5/30/2023 -

6/6/2023

-2.30E-03

+

1.65E-02 2.42E-02

-2.30E-03

+

1.65E-02 2.42E-02 6/6/2023 -

6/13/2023 4.70E-03

+

1.52E-02 2.21E-02 4.70E-03

+

1.52E-02 2.21E-02 6/13/2023 -

6/20/2023

-1.89E-03

+

1.78E-02 2.59E-02

-1.89E-03

+

1.78E-02 2.59E-02 6/20/2023 -

6/27/2023

-1.43E-04

+

1.78E-02 2.62E-02

-1.43E-04

+

1.78E-02 2.62E-02 6/27/2023 -

7/4/2023 6.31E-03

+

1.39E-02 2.00E-02 6.31E-03

+

1.39E-02 2.00E-02 7/4/2023 -

7/11/2023 9.43E-04

+

1.59E-02 2.35E-02 9.43E-04

+

1.59E-02 2.35E-02 7/11/2023 -

7/18/2023 5.52E-03

+

1.33E-02 1.92E-02 5.52E-03

+

1.33E-02 1.92E-02 7/18/2023 -

7/25/2023 6.45E-03

+

1.59E-02 2.28E-02 6.45E-03

+

1.59E-02 2.28E-02 7/25/2023 -

8/1/2023

-7.25E-04

+

1.85E-02 2.73E-02

-7.25E-04

+

1.85E-02 2.73E-02 8/1/2023 -

8/8/2023

-6.32E-03

+

1.81E-02 2.58E-02

-6.32E-03

+

1.81E-02 2.58E-02 8/8/2023 -

8/15/2023 0.00E+00

+

3.37E-03 2.51E-02 0.00E+00

+

3.37E-03 2.51E-02 8/15/2023 -

8/22/2023

-6.01E-03

+

1.78E-02 2.56E-02

-6.01E-03

+

1.78E-02 2.56E-02 8/22/2023 -

8/29/2023

-8.08E-04

+

1.89E-02 2.76E-02

-8.08E-04

+

1.89E-02 2.76E-02 8/29/2023 -

9/5/2023

-5.52E-03

+

1.72E-02 2.47E-02

-5.52E-03

+

1.72E-02 2.47E-02 9/5/2023 -

9/12/2023 6.75E-03

+

1.55E-02 2.22E-02 6.75E-03

+

1.55E-02 2.22E-02 9/12/2023 -

9/19/2023

-3.31E-03

+

1.71E-02 2.49E-02

-3.31E-03

+

1.71E-02 2.49E-02 9/19/2023 -

9/26/2023 3.55E-03

+

1.57E-02 2.29E-02 3.55E-03

+

1.57E-02 2.29E-02 9/26/2023 -

10/3/2023 3.61E-03

+

1.60E-02 2.33E-02 3.61E-03

+

1.60E-02 2.33E-02 10/3/2023 - 10/10/2023 5.57E-04

+

1.15E-02 1.77E-02 5.57E-04

+

1.15E-02 1.77E-02 10/10/2023 - 10/17/2023

-5.56E-03

+

1.43E-02 1.96E-02

-5.56E-03

+

1.43E-02 1.96E-02 10/17/2023 - 10/24/2023

-2.93E-03

+

1.26E-02 1.90E-02

-2.93E-03

+

1.26E-02 1.90E-02 10/24/2023 - 10/31/2023

-4.95E-03

+

1.47E-02 2.18E-02

-4.95E-03

+

1.47E-02 2.18E-02 10/31/2023 -

11/7/2023

-8.06E-03

+

1.49E-02 2.18E-02

-8.06E-03

+

1.49E-02 2.18E-02 11/7/2023 - 11/14/2023 9.18E-03

+

1.48E-02 2.09E-02 9.18E-03

+

1.48E-02 2.09E-02 11/14/2023 - 11/21/2023 2.25E-03

+

1.18E-02 1.79E-02 2.25E-03

+

1.18E-02 1.79E-02 11/21/2023 - 11/28/2023 1.35E-03

+

1.20E-02 1.84E-02 1.35E-03

+

1.20E-02 1.84E-02 11/28/2023 -

12/5/2023 5.84E-03

+

1.10E-02 1.62E-02 5.84E-03

+

1.10E-02 1.62E-02 12/5/2023 - 12/12/2023 4.27E-03

+

1.16E-02 1.73E-02 4.27E-03

+

1.16E-02 1.73E-02 12/12/2023 - 12/19/2023 3.13E-03

+

1.32E-02 1.98E-02 3.13E-03

+

1.32E-02 1.98E-02 12/19/2023 - 12/26/2023 1.06E-03

+

1.82E-02 2.66E-02 1.06E-03

+

1.82E-02 2.66E-02 Station 21B Collection Period NVS = Valid sample not obtained due to sampler failure.

RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 4 of 6

TABLE A-4.1 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS Results in pCi/cubic meter, corrected for decay during collection period Station 23 Station 40 RQ Activity Error MDA RQ Activity Error MDA 12/27/2022 -

1/3/2023 6.39E-03

+

1.57E-02 2.26E-02 6.39E-03

+

1.57E-02 2.26E-02 1/3/2023 -

1/10/2023 6.23E-03

+

1.22E-02 1.80E-02 6.23E-03

+

1.22E-02 1.80E-02 1/10/2023 -

1/17/2023

-3.66E-03

+

1.99E-02 2.88E-02

-3.66E-03

+

1.99E-02 2.88E-02 1/17/2023 -

1/24/2023 4.51E-04

+

1.82E-02 2.69E-02 4.51E-04

+

1.82E-02 2.69E-02 1/24/2023 -

1/31/2023 5.66E-04

+

1.35E-02 2.05E-02 5.66E-04

+

1.35E-02 2.05E-02 1/31/2023 -

2/7/2023

-3.30E-03

+

1.31E-02 1.97E-02

-3.30E-03

+

1.31E-02 1.97E-02 2/7/2023 -

2/14/2023 5.41E-03

+

1.54E-02 2.22E-02 5.41E-03

+

1.54E-02 2.22E-02 2/14/2023 -

2/21/2023 9.49E-04

+

1.60E-02 2.36E-02 9.49E-04

+

1.60E-02 2.36E-02 2/21/2023 -

2/28/2023 6.75E-04

+

1.50E-02 2.22E-02 6.75E-04

+

1.50E-02 2.22E-02 2/28/2023 -

3/7/2023

-1.33E-02

+

2.39E-02 3.35E-02

-1.33E-02

+

2.39E-02 3.35E-02 3/7/2023 -

3/14/2023

-1.72E-03

+

1.75E-02 2.57E-02

-1.72E-03

+

1.75E-02 2.57E-02 3/14/2023 -

3/21/2023 4.99E-03

+

1.81E-02 2.62E-02 4.99E-03

+

1.81E-02 2.62E-02 3/21/2023 -

3/28/2023 6.73E-03

+

1.74E-02 2.50E-02 6.73E-03

+

1.74E-02 2.50E-02 3/28/2023 -

4/4/2023

-2.86E-03

+

1.71E-02 2.50E-02

-2.86E-03

+

1.71E-02 2.50E-02 4/4/2023 -

4/11/2023 5.61E-03

+

1.58E-02 2.29E-02 5.61E-03

+

1.58E-02 2.29E-02 4/11/2023 -

4/18/2023

-2.44E-03

+

1.61E-02 2.36E-02

-2.44E-03

+

1.61E-02 2.36E-02 4/18/2023 -

4/25/2023

-4.46E-03

+

1.84E-02 2.65E-02

-4.46E-03

+

1.84E-02 2.65E-02 4/25/2023 -

5/2/2023 2.86E-03

+

1.58E-02 2.31E-02 2.86E-03

+

1.58E-02 2.31E-02 5/2/2023 -

5/9/2023 8.87E-03

+

1.75E-02 2.49E-02 8.87E-03

+

1.75E-02 2.49E-02 5/9/2023 -

5/16/2023

-7.29E-03

+

1.82E-02 2.60E-02

-7.29E-03

+

1.82E-02 2.60E-02 5/16/2023 -

5/23/2023

-1.11E-02

+

2.12E-02 2.98E-02

-1.11E-02

+

2.12E-02 2.98E-02 5/23/2023 -

5/30/2023 1.08E-03

+

1.40E-02 2.08E-02 1.08E-03

+

1.40E-02 2.08E-02 5/30/2023 -

6/6/2023

-1.16E-02

+

2.09E-02 2.93E-02

-1.16E-02

+

2.09E-02 2.93E-02 6/6/2023 -

6/13/2023

-4.72E-03

+

1.76E-02 2.53E-02

-4.72E-03

+

1.76E-02 2.53E-02 6/13/2023 -

6/20/2023 2.71E-04

+

1.59E-02 2.36E-02 2.71E-04

+

1.59E-02 2.36E-02 6/20/2023 -

6/27/2023

-4.60E-03

+

2.00E-02 2.88E-02

-4.60E-03

+

2.00E-02 2.88E-02 6/27/2022 -

7/4/2022

-6.16E-03

+

1.71E-02 2.52E-02

-6.16E-03

+

1.71E-02 2.52E-02 7/4/2023 -

7/11/2023

-8.32E-03

+

1.83E-02 2.59E-02

-8.32E-03

+

1.83E-02 2.59E-02 7/11/2023 -

7/18/2023

-3.96E-04

+

1.56E-02 2.30E-02

-3.96E-04

+

1.56E-02 2.30E-02 7/18/2023 -

7/25/2023

-5.18E-03

+

2.05E-02 2.94E-02

-5.18E-03

+

2.05E-02 2.94E-02 7/25/2023 -

8/1/2023

-4.95E-03

+

1.94E-02 2.80E-02

-4.95E-03

+

1.94E-02 2.80E-02 8/1/2023 -

8/8/2023

-3.96E-03

+

1.49E-02 2.17E-02

-3.96E-03

+

1.49E-02 2.17E-02 8/8/2023 -

8/15/2023 5.24E-03

+

1.49E-02 2.16E-02 5.24E-03

+

1.49E-02 2.16E-02 8/15/2023 -

8/22/2023

-8.63E-03

+

2.11E-02 3.00E-02

-8.63E-03

+

2.11E-02 3.00E-02 8/22/2023 -

8/29/2023 8.58E-04

+

1.36E-02 2.04E-02 8.58E-04

+

1.36E-02 2.04E-02 8/29/2023 -

9/5/2023

-7.02E-03

+

1.69E-02 2.43E-02

-7.02E-03

+

1.69E-02 2.43E-02 9/5/2023 -

9/12/2023

-7.88E-03

+

2.10E-02 2.99E-02

-7.88E-03

+

2.10E-02 2.99E-02 9/12/2023 -

9/19/2023 4.65E-03

+

1.51E-02 2.19E-02 4.65E-03

+

1.51E-02 2.19E-02 9/19/2023 -

9/26/2023 7.79E-03

+

1.48E-02 2.10E-02 7.79E-03

+

1.48E-02 2.10E-02 9/26/2023 -

10/3/2023 1.07E-03

+

1.39E-02 2.07E-02 1.07E-03

+

1.39E-02 2.07E-02 10/3/2023 - 10/10/2023 1.53E-03

+

1.19E-02 1.82E-02 1.53E-03

+

1.19E-02 1.82E-02 10/10/2023 - 10/17/2023

-3.08E-03

+

1.37E-02 2.02E-02

-3.08E-03

+

1.37E-02 2.02E-02 10/17/2023 - 10/24/2023 5.25E-04

+

1.64E-02 2.41E-02 5.25E-04

+

1.64E-02 2.41E-02 10/24/2023 - 10/31/2023 6.73E-04

+

1.72E-02 2.53E-02 6.73E-04

+

1.72E-02 2.53E-02 10/31/2023 -

11/7/2023

-4.04E-04

+

1.58E-02 2.35E-02

-4.04E-04

+

1.58E-02 2.35E-02 11/7/2023 - 11/14/2023 2.72E-03

+

1.26E-02 1.91E-02 2.72E-03

+

1.26E-02 1.91E-02 11/14/2023 - 11/21/2023 4.59E-03

+

1.62E-02 2.35E-02 4.59E-03

+

1.62E-02 2.35E-02 11/21/2023 - 11/28/2023 6.71E-03

+

1.59E-02 2.27E-02 6.71E-03

+

1.59E-02 2.27E-02 11/28/2023 -

12/5/2023

-5.40E-03

+

1.76E-02 2.54E-02

-5.40E-03

+

1.76E-02 2.54E-02 12/5/2023 - 12/12/2023 1.75E-03

+

1.64E-02 2.40E-02 1.75E-03

+

1.64E-02 2.40E-02 12/12/2023 - 12/19/2023

-1.68E-03

+

1.35E-02 2.04E-02

-1.68E-03

+

1.35E-02 2.04E-02 12/19/2023 - 12/26/2023

-3.31E-03

+

1.31E-02 1.97E-02

-3.31E-03

+

1.31E-02 1.97E-02 Collection Period NVS = Valid sample not obtained due to sampler failure.

RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 5 of 6

TABLE A-4.1 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS Results in pCi/cubic meter, corrected for decay during collection period Station 48 Station 57 RQ Activity Error MDA RQ Activity Error MDA 12/27/2022 -

1/3/2023 6.39E-03

+

1.57E-02 2.26E-02 6.39E-03

+

1.57E-02 2.26E-02 1/3/2023 -

1/10/2023 6.23E-03

+

1.22E-02 1.80E-02 6.23E-03

+

1.22E-02 1.80E-02 1/10/2023 -

1/17/2023

-3.66E-03

+

1.99E-02 2.88E-02

-3.66E-03

+

1.99E-02 2.88E-02 1/17/2023 -

1/24/2023 4.51E-04

+

1.82E-02 2.69E-02 4.51E-04

+

1.82E-02 2.69E-02 1/24/2023 -

1/31/2023 5.66E-04

+

1.35E-02 2.05E-02 5.66E-04

+

1.35E-02 2.05E-02 1/31/2023 -

2/7/2023

-3.30E-03

+

1.31E-02 1.97E-02

-3.30E-03

+

1.31E-02 1.97E-02 2/7/2023 -

2/14/2023 5.41E-03

+

1.54E-02 2.22E-02 5.41E-03

+

1.54E-02 2.22E-02 2/14/2023 -

2/21/2023 9.49E-04

+

1.60E-02 2.36E-02 9.49E-04

+

1.60E-02 2.36E-02 2/21/2023 -

2/28/2023 6.75E-04

+

1.50E-02 2.22E-02 6.75E-04

+

1.50E-02 2.22E-02 2/28/2023 -

3/7/2023

-1.33E-02

+

2.39E-02 3.35E-02

-1.33E-02

+

2.39E-02 3.35E-02 3/7/2023 -

3/14/2023

-1.72E-03

+

1.75E-02 2.57E-02

-1.72E-03

+

1.75E-02 2.57E-02 3/14/2023 -

3/21/2023 4.99E-03

+

1.81E-02 2.62E-02 4.99E-03

+

1.81E-02 2.62E-02 3/21/2023 -

3/28/2023 6.73E-03

+

1.74E-02 2.50E-02 6.73E-03

+

1.74E-02 2.50E-02 3/28/2023 -

4/4/2023

-2.86E-03

+

1.71E-02 2.50E-02

-2.86E-03

+

1.71E-02 2.50E-02 4/4/2023 -

4/11/2023 5.61E-03

+

1.58E-02 2.29E-02 5.61E-03

+

1.58E-02 2.29E-02 4/11/2023 -

4/18/2023

-2.44E-03

+

1.61E-02 2.36E-02

-2.44E-03

+

1.61E-02 2.36E-02 4/18/2023 -

4/25/2023

-4.46E-03

+

1.84E-02 2.65E-02

-4.46E-03

+

1.84E-02 2.65E-02 4/25/2023 -

5/2/2023 2.86E-03

+

1.58E-02 2.31E-02 2.86E-03

+

1.58E-02 2.31E-02 5/2/2023 -

5/9/2023 8.87E-03

+

1.75E-02 2.49E-02 8.87E-03

+

1.75E-02 2.49E-02 5/9/2023 -

5/16/2023

-7.29E-03

+

1.82E-02 2.60E-02

-7.29E-03

+

1.82E-02 2.60E-02 5/16/2023 -

5/23/2023

-1.11E-02

+

2.12E-02 2.98E-02

-1.11E-02

+

2.12E-02 2.98E-02 5/23/2023 -

5/30/2023 1.08E-03

+

1.40E-02 2.08E-02 1.08E-03

+

1.40E-02 2.08E-02 5/30/2023 -

6/6/2023

-1.16E-02

+

2.09E-02 2.93E-02

-1.16E-02

+

2.09E-02 2.93E-02 6/6/2023 -

6/13/2023

-4.72E-03

+

1.76E-02 2.53E-02

-4.72E-03

+

1.76E-02 2.53E-02 6/13/2023 -

6/20/2023 2.71E-04

+

1.59E-02 2.36E-02 2.71E-04

+

1.59E-02 2.36E-02 6/20/2023 -

6/27/2023

-4.60E-03

+

2.00E-02 2.88E-02

-4.60E-03

+

2.00E-02 2.88E-02 6/27/2022 -

7/4/2022

-6.16E-03

+

1.71E-02 2.52E-02

-6.16E-03

+

1.71E-02 2.52E-02 7/4/2023 -

7/11/2023

-8.32E-03

+

1.83E-02 2.59E-02

-8.32E-03

+

1.83E-02 2.59E-02 7/11/2023 -

7/18/2023

-3.96E-04

+

1.56E-02 2.30E-02

-3.96E-04

+

1.56E-02 2.30E-02 7/18/2023 -

7/25/2023

-5.18E-03

+

2.05E-02 2.94E-02

-5.18E-03

+

2.05E-02 2.94E-02 7/25/2023 -

8/1/2023

-4.95E-03

+

1.94E-02 2.80E-02

-4.95E-03

+

1.94E-02 2.80E-02 8/1/2023 -

8/8/2023

-3.96E-03

+

1.49E-02 2.17E-02

-3.96E-03

+

1.49E-02 2.17E-02 8/8/2023 -

8/15/2023 5.24E-03

+

1.49E-02 2.16E-02 5.24E-03

+

1.49E-02 2.16E-02 8/15/2023 -

8/22/2023

-8.63E-03

+

2.11E-02 3.00E-02

-8.63E-03

+

2.11E-02 3.00E-02 8/22/2023 -

8/29/2023 8.58E-04

+

1.36E-02 2.04E-02 8.58E-04

+

1.36E-02 2.04E-02 8/29/2023 -

9/5/2023

-7.02E-03

+

1.69E-02 2.43E-02

-7.02E-03

+

1.69E-02 2.43E-02 9/5/2023 -

9/12/2023

-7.88E-03

+

2.10E-02 2.99E-02

-7.88E-03

+

2.10E-02 2.99E-02 9/12/2023 -

9/19/2023 4.65E-03

+

1.51E-02 2.19E-02 4.65E-03

+

1.51E-02 2.19E-02 9/19/2023 -

9/26/2023 7.79E-03

+

1.48E-02 2.10E-02 7.79E-03

+

1.48E-02 2.10E-02 9/26/2023 -

10/3/2023 1.07E-03

+

1.39E-02 2.07E-02 1.07E-03

+

1.39E-02 2.07E-02 10/3/2023 - 10/10/2023 1.53E-03

+

1.19E-02 1.82E-02 1.53E-03

+

1.19E-02 1.82E-02 10/10/2023 - 10/17/2023

-3.08E-03

+

1.37E-02 2.02E-02

-3.08E-03

+

1.37E-02 2.02E-02 10/17/2023 - 10/24/2023 5.25E-04

+

1.64E-02 2.41E-02 5.25E-04

+

1.64E-02 2.41E-02 10/24/2023 - 10/31/2023 6.73E-04

+

1.72E-02 2.53E-02 6.73E-04

+

1.72E-02 2.53E-02 10/31/2023 -

11/7/2023

-4.04E-04

+

1.58E-02 2.35E-02

-4.04E-04

+

1.58E-02 2.35E-02 11/7/2023 - 11/14/2023 2.72E-03

+

1.26E-02 1.91E-02 2.72E-03

+

1.26E-02 1.91E-02 11/14/2023 - 11/21/2023 4.59E-03

+

1.62E-02 2.35E-02 4.59E-03

+

1.62E-02 2.35E-02 11/21/2023 - 11/28/2023 6.71E-03

+

1.59E-02 2.27E-02 6.71E-03

+

1.59E-02 2.27E-02 11/28/2023 -

12/5/2023

-5.40E-03

+

1.76E-02 2.54E-02

-5.40E-03

+

1.76E-02 2.54E-02 12/5/2023 - 12/12/2023 1.75E-03

+

1.64E-02 2.40E-02 1.75E-03

+

1.64E-02 2.40E-02 12/12/2023 - 12/19/2023

-1.68E-03

+

1.35E-02 2.04E-02

-1.68E-03

+

1.35E-02 2.04E-02 12/19/2023 - 12/26/2023

-3.31E-03

+

1.31E-02 1.97E-02

-3.31E-03

+

1.31E-02 1.97E-02 Collection Period NVS = Valid sample not obtained due to sampler failure.

RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 6 of 6

TABLE A-4.2 GAMMA SPECTROMETRY RESULTS OF IODINE-131 ON CHARCOAL FILTERS -

SUMMARY

Results in pCi per cubic meter, corrected for decay during collection period Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs I-131 Ind

-2.48E-04

-1.33E-02 1.13E-02 2.36E-02 572 0

I-131 Cntl

-2.38E-04

-1.11E-02 1.13E-02 2.33E-02 52 0

Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-5.1 GROSS BETA IN WATER Results in pCi per liter ST-26 River/Drinking Cntl ST-29 River/Drinking Ind Collection Period RQ Activity Error MDA RQ Activity Error MDA 12/29/22 -

01/29/23 <

5.19E-01 +

5.94E-01 2.01E+00

< 1.84E+00

+

7.14E-01 2.10E+00 01/29/23 -

02/27/23 <

2.86E-02 +

6.59E-01 2.34E+00

< -4.54E-01

+

6.79E-01 2.34E+00 02/27/23 -

03/30/23 <

8.22E-01 +

6.06E-01 1.98E+00 4.81E-01

+

5.87E-01 1.99E+00 03/30/23 -

05/01/23 <

2.04E-01 +

6.66E-01 2.29E+00

< -5.86E-01

+

6.80E-01 2.29E+00 05/01/23 -

06/01/23 <

2.28E+00 +

7.76E-01 2.29E+00 4.94E-01

+

6.81E-01 2.30E+00 06/01/23 -

06/29/23

-3.71E-01 +

6.91E-01 2.37E+00

< -8.41E-01

+

7.10E-01 2.38E+00 06/29/23 -

07/31/23

-1.20E-02 +

6.58E-01 2.32E+00

< -6.57E-01

+

7.01E-01 2.36E+00 07/31/23 -

08/31/23

-2.84E-01 +

6.12E-01 2.17E+00 3.38E-01

+

6.20E-01 2.19E+00 08/31/23 -

09/28/23

-5.19E-01 +

6.45E-01 2.24E+00 6.37E-01

+

6.51E-01 2.23E+00 09/28/23 -

10/30/23

-3.37E-01 +

6.30E-01 2.19E+00 5.18E-01

+

6.40E-01 2.19E+00 10/30/23 -

11/30/23 <

3.57E-01 +

5.44E-01 1.88E+00

< 1.32E+00

+

6.23E-01 1.88E+00 11/30/23 -

12/28/23

-7.76E-02 +

5.82E-01 2.10E+00 1.82E-01

+

5.95E-01 2.10E+00 ST-27 CW Discharge Collection Period RQ Activity Error MDA 12/29/22 - 01/29/23

+

4.08E+00

+

9.42E-01 2.45E+00 01/29/23 - 02/27/23 5.10E-01

+

6.81E-01 2.34E+00 02/27/23 - 03/30/23

+

6.88E+00

+

1.12E+00 2.60E+00 03/30/23 - 05/01/23

+

3.84E+00

+

8.53E-01 2.29E+00 05/01/23 - 06/01/23

+

2.83E+00

+

8.85E-01 2.51E+00 06/01/23 - 06/29/23

< 1.58E+00

+

8.15E-01 2.53E+00 06/29/23 - 07/31/23

< 1.85E+00

+

8.97E-01 2.80E+00 07/31/23 - 08/31/23

+

4.27E+00

+

9.67E-01 2.64E+00 08/31/23 - 09/28/23

< 1.94E+00

+

9.36E-01 2.86E+00 09/28/23 - 10/30/23

+

4.69E+00

+

1.03E+00 2.70E+00 10/30/23 - 11/30/23

+

5.08E+00

+

8.39E-01 1.88E+00 11/30/23 - 12/28/23

+

6.03E+00

+

1.10E+00 2.64E+00 TABLE A-5.2 GROSS BETA IN WATER -

SUMMARY

Results in pCi per liter Location Average Activity Activity Low Activity High Number of Samples Number of Positive IDs ST-26 Control 2.17E-01

-5.19E-01 2.28E+00 12 0

ST-29 Indicator 2.73E-01

-8.41E-01 1.84E+00 12 0

ST-27 Discharge 3.63E+00 5.10E-01 6.88E+00 12 8

RQ = Results Qualifier. If <, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE A-6.1 TRITIUM IN WATER Results in pCi per liter, MDA for all samples is 300 pCi/l Station Description Collection Period RQ Activity Error 26 River/Drinking Control 12/29/22 03/30/23 8.05E+01

+

9.15E+01 03/30/23 06/29/23 1.20E+02

+

1.00E+02 06/29/23 09/28/23 1.37E+02

+

1.04E+02 09/28/23 12/28/23 1.12E+02

+

1.03E+02 29 River/Drinking Indicator 12/29/22 03/30/23 1.29E+02

+

9.93E+01 03/30/23 06/29/23 9.51E+01

+

1.00E+02 06/29/23 09/28/23 1.41E+02

+

1.04E+02 09/28/23 12/28/23 9.95E+01

+

1.07E+02 27 Plant Discharge 12/29/22 03/30/23 1.09E+02

+

9.35E+01 03/30/23 06/29/23 1.15E+02

+

3.90E+01 06/29/23 09/28/23 2.19E+02

+

4.40E+01 09/28/23 12/28/23 1.82E+02

+

4.90E+01 31 Ground Water Well 1 03/06/23 5.07E+01

+

9.50E+01 06/08/23 8.50E+01

+

9.85E+01 08/16/23 1.23E+02

+

1.01E+02 11/06/23 5.86E+01

+

9.68E+01 32 Ground Water Well 2 03/06/23 8.90E+01

+

9.46E+01 06/08/23 1.26E+02

+

9.98E+01 08/16/23 1.42E+02

+

1.02E+02 11/06/23 5.12E+01

+

9.71E+01 52 Ground Water Well 3 03/20/23 1.67E+02

+

9.41E+01 06/13/23 2.53E+01

+

9.42E+01 08/23/23 8.28E+01

+

9.81E+01 12/08/23 1.62E+02

+

1.14E+02 TABLE A-6.2 TRITIUM IN WATER - Summary Results in pCi per liter Location Description Average Activity Activity Low Activity High Number of Samples Number of Positive IDs River/Drinking Control 1.13E+02 8.05E+01 1.37E+02 4

0 River/Drinking Indicator 1.16E+02 9.51E+01 1.41E+02 4

0 Discharge Indicator 1.56E+02 1.09E+02 2.19E+02 4

0 Ground Water Indicator 9.68E+01 2.53E+01 1.67E+02 12 0

Quarterly tritium values reported for ST-26, 27, and 29 are average of monthly analysis values.

RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above the detection limit.

Page 1 of 1

Table A-7.1 GAMMA SPECTROMETRY RESULTS OF RIVER/DRINKING WATER Station 26 - Control Station 29 - Indicator Results in pCi/liter, corrected for decay during collection period Location ST-26 collected 2/2/2023 Location ST-26 collected 3/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.16E+01 +

5.86E+01 8.75E+01 K-40

-2.40E+01 + 6.33E+01 9.10E+01 CR-51 2.01E+00 +

3.65E+01 5.17E+01 CR-51 2.76E+00 + 3.58E+01 5.08E+01 MN-54

-2.69E-02 +

4.00E+00 5.50E+00 MN-54 2.69E-02

+ 4.28E+00 5.86E+00 CO-58 1.15E+00 +

3.84E+00 5.19E+00 CO-58

-2.41E+00 + 4.85E+00 6.42E+00 FE-59 2.19E+00 +

1.17E+01 1.52E+01 FE-59 6.60E+00 + 1.01E+01 1.28E+01 CO-60 0.00E+00 +

2.93E+00 5.82E+00 CO-60 2.20E+00 + 4.36E+00 5.55E+00 ZN-65 1.19E+00 +

7.65E+00 1.03E+01 ZN-65

-7.69E+00 + 1.16E+01 1.48E+01 ZRNB-95

-2.12E+00 +

7.80E+00 1.05E+01 ZRNB-95

-9.96E-01 + 7.13E+00 9.70E+00 I-131

-3.27E+00 +

6.16E+00 8.59E+00 I-131 6.72E-01

+ 5.78E+00 8.22E+00 CS-134

-1.07E+00 +

4.29E+00 5.90E+00 CS-134 3.22E-01

+ 3.72E+00 5.19E+00 CS-137 1.06E+00 +

4.01E+00 5.58E+00 CS-137 5.28E-01

+ 4.09E+00 5.72E+00 BALA140

-5.75E-02 +

6.65E+00 8.62E+00 BALA140

-3.13E+00 + 8.11E+00 1.01E+01 BI-214

-4.56E+00 +

1.00E+01 1.49E+01 BI-214 6.58E+00 + 9.21E+00 1.32E+01 Location ST-26 collected 4/3/2023 Location ST-26 collected 5/1/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.88E-01

+

5.38E+01 7.98E+01 K-40

-1.68E+01 + 6.20E+01 8.93E+01 CR-51 1.19E+01 +

3.21E+01 4.51E+01 CR-51

-2.16E+01 + 4.69E+01 6.54E+01 MN-54 5.07E-01

+

4.01E+00 5.46E+00 MN-54

-2.82E+00 + 4.52E+00 5.94E+00 CO-58 1.00E+00 +

4.10E+00 5.53E+00 CO-58

-2.66E+00 + 5.00E+00 6.61E+00 FE-59 0.00E+00 +

1.25E+00 1.33E+01 FE-59 1.83E+00 + 1.13E+01 1.49E+01 CO-60

-8.35E-01 +

4.23E+00 5.55E+00 CO-60 3.43E-01

+ 3.71E+00 4.97E+00 ZN-65

-2.81E+00 +

1.00E+01 1.31E+01 ZN-65

-7.84E+00 + 1.18E+01 1.51E+01 ZRNB-95 2.96E+00 +

6.15E+00 8.22E+00 ZRNB-95

-1.32E+00 + 7.67E+00 1.04E+01 I-131

-3.20E-01 +

4.28E+00 6.09E+00 I-131

-1.50E+00 + 1.03E+01 1.46E+01 CS-134

-2.82E+00 +

4.69E+00 6.33E+00 CS-134 0.00E+00 + 0.00E+00 5.59E+00 CS-137

-2.64E-01 +

4.17E+00 5.86E+00 CS-137 1.72E+00 + 4.19E+00 5.76E+00 BALA140

-1.99E+00 +

5.76E+00 7.26E+00 BALA140

-2.78E+00 + 1.14E+01 1.44E+01 BI-214 6.45E+00 +

1.04E+01 1.47E+01 BI-214 4.76E+00 + 9.01E+00 1.31E+01 Location ST-26 collected 6/1/2023 Location ST-26 collected 6/29/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-2.36E+01 +

6.50E+01 9.28E+01 K-40 2.06E+01 + 6.08E+01 8.56E+01 CR-51

-1.17E+01 +

4.08E+01 5.72E+01 CR-51 5.57E+00 + 4.02E+01 5.68E+01 MN-54 4.84E-01

+

3.64E+00 4.98E+00 MN-54 5.67E-01

+ 3.86E+00 5.27E+00 CO-58 1.39E+00 +

3.96E+00 5.32E+00 CO-58

-2.92E+00 + 5.11E+00 6.72E+00 FE-59

-9.11E-01 +

1.29E+01 1.68E+01 FE-59

-6.58E-01 + 1.29E+01 1.68E+01 CO-60

-4.94E-01 +

4.64E+00 6.08E+00 CO-60

-3.80E-01 + 4.42E+00 5.83E+00 ZN-65

-3.03E+00 +

9.86E+00 1.29E+01 ZN-65

-1.33E+00 + 1.13E+01 1.94E+01 ZRNB-95 1.04E+00 +

8.16E+00 1.10E+01 ZRNB-95

-3.23E+00 + 8.32E+00 1.11E+01 I-131

-3.21E+00 +

6.32E+00 8.81E+00 I-131

-2.86E+00 + 6.92E+00 9.70E+00 CS-134

-1.93E+00 +

4.38E+00 5.96E+00 CS-134

-2.29E+00 + 6.67E+00 1.12E+01 CS-137

-1.32E-01 +

4.77E+00 6.66E+00 CS-137

-1.06E+00 + 4.97E+00 6.87E+00 BALA140

-1.14E+00 +

7.04E+00 8.97E+00 BALA140 6.37E-01

+ 7.81E+00 1.00E+01 BI-214

-6.45E+00 +

9.80E+00 1.47E+01 BI-214

+

5.10E+01 + 1.03E+01 1.16E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 4

Table A-7.1 GAMMA SPECTROMETRY RESULTS OF RIVER/DRINKING WATER Station 26 - Control Station 29 - Indicator Results in pCi/liter, corrected for decay during collection period Location ST-26 collected 7/31/2023 Location ST-26 collected 8/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-6.15E+00 +

3.92E+01 5.61E+01 K-40

+

6.72E+01 + 4.29E+01 5.68E+01 CR-51 6.17E+00 +

2.41E+01 3.40E+01 CR-51

-6.95E+01 + 9.39E+03 1.38E+04 MN-54 1.58E+00 +

2.80E+00 3.71E+00 MN-54 1.45E+00 + 4.88E+00 6.53E+00 CO-58 5.80E-01

+

3.02E+00 4.08E+00 CO-58 9.44E+00 + 2.92E+01 4.03E+01 FE-59

-4.07E+00 +

8.59E+00 1.09E+01 FE-59

-1.50E+02 + 2.97E+02 3.85E+02 CO-60 8.46E-01

+

2.87E+00 3.64E+00 CO-60 5.93E-01

+ 3.74E+00 5.05E+00 ZN-65

-5.54E+00 +

8.63E+00 1.07E+01 ZN-65

-1.00E+01 + 1.90E+01 2.43E+01 ZRNB-95 1.79E+00 +

4.73E+00 6.34E+00 ZRNB-95 0.00E+00 + 2.63E+00 7.26E+00 I-131 1.57E+00 +

3.58E+00 5.02E+00 I-131 0.00E+00 + 0.00E+00 0.00E+00 CS-134

-1.82E+00 +

3.63E+00 4.90E+00 CS-134

-2.29E+00 + 5.62E+00 9.36E+00 CS-137

-9.27E-01 +

3.24E+00 4.46E+00 CS-137 1.65E+00 + 3.77E+00 5.11E+00 BALA140

-3.91E+00 +

5.78E+00 6.85E+00 BALA140 0.00E+00 + 0.00E+00 0.00E+00 BI-214 4.21E+00 +

8.83E+00 1.24E+01 BI-214

+

2.24E+01 + 8.41E+00 1.01E+01 Location ST-26 collected 9/28/2023 Location ST-26 collected 10/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.77E+01 +

4.61E+01 5.21E+01 K-40 2.32E+01 + 5.54E+01 7.98E+01 CR-51

-6.09E+00 +

3.51E+01 4.89E+01 CR-51 1.70E+01 + 3.43E+01 4.78E+01 MN-54

-1.01E+00 +

3.47E+00 4.45E+00 MN-54

-5.88E-01 + 4.95E+00 6.67E+00 CO-58

-1.44E+00 +

3.99E+00 4.97E+00 CO-58

-3.16E+00 + 5.08E+00 6.66E+00 FE-59 1.59E+00 +

9.00E+00 1.16E+01 FE-59

-5.04E+00 + 1.24E+01 1.58E+01 CO-60 1.79E+00 +

3.28E+00 3.44E+00 CO-60

-2.24E+00 + 5.16E+00 6.56E+00 ZN-65

-3.79E+00 +

9.23E+00 1.06E+01 ZN-65

-3.28E-02 + 9.23E+00 1.61E+01 ZRNB-95

-1.72E+00 +

6.51E+00 8.44E+00 ZRNB-95 7.38E-01

+ 6.58E+00 9.00E+00 I-131 2.95E+00 +

9.19E+00 1.24E+01 I-131

-8.03E-01 + 4.98E+00 7.04E+00 CS-134

-1.38E+00 +

3.79E+00 4.83E+00 CS-134

-2.58E+00 + 5.98E+00 1.00E+01 CS-137

-7.42E-01 +

3.54E+00 4.79E+00 CS-137 0.00E+00 + 0.00E+00 6.78E+00 BALA140

-7.67E+00 +

1.35E+01 1.34E+01 BALA140 1.84E+00 + 5.02E+00 6.39E+00 BI-214

-1.90E+00 +

9.17E+00 1.29E+01 BI-214

+

2.52E+01 + 9.57E+00 1.20E+01 Location ST-26 collected 11/30/2023 Location ST-26 collected 12/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.18E+01 +

4.48E+01 6.10E+01 K-40

-1.87E+01 + 4.87E+01 6.21E+01 CR-51 6.10E+00 +

2.58E+01 3.76E+01 CR-51

-2.66E+00 + 2.91E+01 4.11E+01 MN-54 1.46E+00 +

2.92E+00 3.89E+00 MN-54 5.43E-01

+ 2.87E+00 3.83E+00 CO-58

-8.89E-01 +

3.35E+00 4.64E+00 CO-58 4.67E-01

+ 2.97E+00 3.98E+00 FE-59

-2.62E-01 +

7.84E+00 1.06E+01 FE-59 7.76E-01

+ 9.52E+00 1.23E+01 CO-60 1.33E+00 +

2.95E+00 4.01E+00 CO-60

-2.08E+00 + 4.86E+00 5.43E+00 ZN-65

-2.42E+00 +

8.59E+00 1.46E+01 ZN-65

-2.36E+00 + 7.69E+00 9.34E+00 ZRNB-95 4.80E+00 +

5.01E+00 6.65E+00 ZRNB-95

-1.83E+00 + 6.29E+00 8.08E+00 I-131

-1.50E+00 +

4.36E+00 6.35E+00 I-131 2.61E+00 + 5.51E+00 6.85E+00 CS-134 1.64E-01

+

4.89E+00 8.25E+00 CS-134

-2.20E+00 + 4.25E+00 4.96E+00 CS-137 3.40E+00 +

3.84E+00 5.11E+00 CS-137 1.11E+00 + 3.66E+00 4.81E+00 BALA140

-2.39E+00 +

6.17E+00 7.83E+00 BALA140 6.81E-01

+ 5.30E+00 6.60E+00 BI-214

+

3.90E+01 +

9.13E+00 1.04E+01 BI-214 9.22E+00 + 1.25E+01 1.17E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 4

Table A-7.1 GAMMA SPECTROMETRY RESULTS OF RIVER/DRINKING WATER Station 26 - Control Station 29 - Indicator Results in pCi/liter, corrected for decay during collection period Location ST-29 collected 2/2/2023 Location ST-29 collected 3/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.20E+02 +

3.50E+01 3.10E+01 K-40 2.71E+01 + 5.57E+01 7.98E+01 CR-51 6.65E+00 +

2.46E+01 3.43E+01 CR-51 1.61E+01 + 3.85E+01 5.38E+01 MN-54 1.48E-01

+

3.08E+00 4.12E+00 MN-54

-5.40E-02 + 4.12E+00 5.65E+00 CO-58

-8.62E-01 +

3.14E+00 4.16E+00 CO-58

-8.95E-01 + 4.32E+00 5.85E+00 FE-59

-2.36E-01 +

8.61E+00 1.11E+01 FE-59 3.80E-01

+ 1.43E+01 1.86E+01 CO-60 2.07E+00 +

2.56E+00 3.17E+00 CO-60 1.60E+00 + 4.73E+00 6.09E+00 ZN-65

-1.63E+00 +

6.56E+00 8.51E+00 ZN-65 3.66E+00 + 8.86E+00 1.16E+01 ZRNB-95 4.82E-02

+

5.14E+00 6.92E+00 ZRNB-95

-2.28E+00 + 8.33E+00 1.12E+01 I-131 2.65E-01

+

4.57E+00 6.44E+00 I-131 5.44E+00 + 6.25E+00 8.59E+00 CS-134

-8.59E-01 +

2.85E+00 3.87E+00 CS-134

-1.83E+00 + 4.39E+00 5.98E+00 CS-137 1.87E+00 +

3.29E+00 4.43E+00 CS-137

-1.32E-01 + 4.27E+00 5.99E+00 BALA140 6.41E-01

+

4.82E+00 6.08E+00 BALA140

-7.93E-01 + 7.27E+00 9.39E+00 BI-214 5.58E-01

+

6.79E+00 9.82E+00 BI-214 9.77E+00 + 9.44E+00 1.33E+01 Location ST-29 collected 4/3/2023 Location ST-29 collected 5/1/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.72E+00 +

5.22E+01 7.78E+01 K-40

-1.90E+01 + 6.01E+01 8.75E+01 CR-51 2.18E+00 +

3.61E+01 5.11E+01 CR-51

-1.63E+01 + 4.98E+01 6.98E+01 MN-54 3.21E-01

+

4.19E+00 5.71E+00 MN-54 3.85E-01

+ 4.12E+00 5.62E+00 CO-58

-1.95E+00 +

4.71E+00 6.25E+00 CO-58

-9.34E-01 + 4.55E+00 6.16E+00 FE-59 1.24E+00 +

1.13E+01 1.47E+01 FE-59

-4.80E+00 + 1.27E+01 1.64E+01 CO-60

-3.04E-01 +

4.62E+00 6.08E+00 CO-60 1.37E+00 + 4.07E+00 5.28E+00 ZN-65 1.38E+00 +

7.95E+00 1.06E+01 ZN-65

-1.63E+00 + 9.77E+00 1.29E+01 ZRNB-95 3.23E+00 +

6.24E+00 8.31E+00 ZRNB-95

-1.58E+00 + 8.65E+00 1.17E+01 I-131 1.65E-01

+

4.86E+00 6.92E+00 I-131 9.78E+00 + 1.30E+01 1.79E+01 CS-134

-9.63E-01 +

3.75E+00 5.17E+00 CS-134 7.57E-01

+ 3.83E+00 5.31E+00 CS-137

-3.03E+00 +

5.29E+00 7.15E+00 CS-137

-3.03E+00 + 5.41E+00 7.32E+00 BALA140

-3.08E-01 +

5.95E+00 7.68E+00 BALA140 1.79E+00 + 1.10E+01 1.41E+01 BI-214

-1.15E+00 +

9.45E+00 1.40E+01 BI-214 4.76E+00 + 9.05E+00 1.31E+01 Location ST-29 collected 6/1/2023 Location ST-29 collected 6/29/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-2.28E+01 +

3.54E+01 5.35E+01 K-40

-4.68E+01 + 6.19E+01 9.10E+01 CR-51

-1.41E+01 +

2.97E+01 4.14E+01 CR-51 8.50E+00 + 3.92E+01 5.53E+01 MN-54

-7.08E-01 +

3.24E+00 4.36E+00 MN-54

-3.33E+00 + 5.29E+00 6.93E+00 CO-58 3.63E-01

+

3.18E+00 4.31E+00 CO-58

-4.18E-01 + 4.08E+00 5.57E+00 FE-59

-1.32E+00 +

8.03E+00 1.04E+01 FE-59

-2.83E-01 + 1.15E+01 1.51E+01 CO-60 1.08E+00 +

2.72E+00 3.43E+00 CO-60 4.94E-01

+ 4.21E+00 5.56E+00 ZN-65

-3.11E+00 +

8.06E+00 1.02E+01 ZN-65

-6.90E+00 + 1.12E+01 1.43E+01 ZRNB-95 8.96E-01

+

5.76E+00 7.77E+00 ZRNB-95 5.07E+00 + 7.36E+00 9.66E+00 I-131 4.56E-01

+

4.51E+00 6.41E+00 I-131

-4.62E+00 + 8.21E+00 1.14E+01 CS-134

-1.97E+00 +

3.58E+00 4.83E+00 CS-134

-6.44E-01 + 4.18E+00 5.77E+00 CS-137 3.71E-01

+

3.37E+00 4.68E+00 CS-137

-1.85E+00 + 4.80E+00 6.57E+00 BALA140 1.42E+00 +

3.46E+00 4.33E+00 BALA140 1.42E+00 + 6.73E+00 8.66E+00 BI-214

-1.30E+00 +

8.38E+00 1.21E+01 BI-214 9.09E+00 + 1.00E+01 1.41E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 3 of 4

Table A-7.1 GAMMA SPECTROMETRY RESULTS OF RIVER/DRINKING WATER Station 26 - Control Station 29 - Indicator Results in pCi/liter, corrected for decay during collection period Location ST-29 collected 7/31/2023 Location ST-29 collected 8/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.45E+01 +

5.86E+01 8.37E+01 K-40

-3.85E+01 + 6.57E+01 9.44E+01 CR-51 1.16E+01 +

3.46E+01 4.85E+01 CR-51 2.18E+01 + 4.25E+01 5.92E+01 MN-54 2.12E+00 +

3.43E+00 4.55E+00 MN-54

-2.18E-01 + 4.27E+00 5.83E+00 CO-58

-2.17E+00 +

4.53E+00 6.01E+00 CO-58 8.78E-02

+ 4.47E+00 6.12E+00 FE-59

-3.07E+00 +

1.21E+01 1.56E+01 FE-59 1.63E+00 + 1.35E+01 1.76E+01 CO-60

-1.37E+00 +

4.91E+00 6.33E+00 CO-60

-2.28E-01 + 4.83E+00 6.35E+00 ZN-65

-7.50E+00 +

1.13E+01 1.45E+01 ZN-65

-6.73E+00 + 1.08E+01 1.39E+01 ZRNB-95 4.68E-01

+

6.83E+00 9.36E+00 ZRNB-95 7.14E-01

+ 7.64E+00 1.04E+01 I-131 9.51E-01

+

5.41E+00 7.66E+00 I-131 1.80E+00 + 1.14E+01 1.61E+01 CS-134 1.07E+00 +

3.87E+00 5.33E+00 CS-134

-1.51E+00 + 4.08E+00 5.59E+00 CS-137

-3.20E+00 +

5.25E+00 7.09E+00 CS-137

-3.08E+00 + 5.25E+00 7.10E+00 BALA140 1.55E+00 +

6.15E+00 7.84E+00 BALA140 2.89E+00 + 1.01E+01 1.27E+01 BI-214 6.36E+00 +

9.94E+00 1.41E+01 BI-214 2.49E+00 + 9.89E+00 1.43E+01 Location ST-29 collected 9/28/2023 Location ST-29 collected 10/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-1.80E+01 +

4.75E+01 6.22E+01 K-40 3.80E+01 + 4.62E+01 6.34E+01 CR-51

-1.28E+00 +

4.01E+01 5.69E+01 CR-51 8.65E+00 + 2.65E+01 3.86E+01 MN-54 3.85E-02

+

3.01E+00 4.11E+00 MN-54

-1.24E+00 + 3.44E+00 4.59E+00 CO-58

-7.96E-01 +

3.79E+00 5.00E+00 CO-58

-8.23E-01 + 3.25E+00 4.51E+00 FE-59 7.81E+00 +

1.13E+01 1.03E+01 FE-59 3.76E+00 + 7.18E+00 9.41E+00 CO-60 9.03E-01

+

4.00E+00 4.89E+00 CO-60

-3.22E-01 + 3.23E+00 4.54E+00 ZN-65

-6.74E+00 +

1.23E+01 1.29E+01 ZN-65 1.92E+00 + 7.79E+00 1.33E+01 ZRNB-95 1.95E-01

+

6.35E+00 8.66E+00 ZRNB-95

-2.51E+00 + 6.41E+00 8.78E+00 I-131

-4.42E+00 +

1.78E+01 2.44E+01 I-131

-2.60E+00 + 6.07E+00 8.80E+00 CS-134

-2.56E+00 +

4.88E+00 5.66E+00 CS-134

-1.73E+00 + 4.80E+00 8.03E+00 CS-137

-3.71E-01 +

3.96E+00 5.44E+00 CS-137 1.73E+00 + 3.36E+00 4.58E+00 BALA140

-3.21E+00 +

1.34E+01 1.60E+01 BALA140 4.11E-01

+ 5.66E+00 7.51E+00 BI-214

+

1.33E+01 +

1.58E+01 1.26E+01 BI-214

+

2.92E+01 + 8.26E+00 1.00E+01 Location ST-29 collected 11/30/2023 Location ST-29 collected 12/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.34E+01 +

4.65E+01 6.34E+01 K-40

+

6.52E+01 + 4.56E+01 6.01E+01 CR-51

-5.29E+00 +

2.94E+01 4.30E+01 CR-51 2.47E+00 + 2.32E+01 3.42E+01 MN-54

-7.04E-01 +

3.58E+00 4.81E+00 MN-54 2.23E+00 + 2.80E+00 3.64E+00 CO-58 0.00E+00 +

0.00E+00 4.12E+00 CO-58

-7.24E-01 + 2.86E+00 3.97E+00 FE-59 1.57E+00 +

7.96E+00 1.07E+01 FE-59 6.71E-01

+ 8.73E+00 1.16E+01 CO-60

-1.84E+00 +

3.66E+00 5.00E+00 CO-60 1.07E-01

+ 2.92E+00 4.07E+00 ZN-65

-6.06E+00 +

9.77E+00 1.24E+01 ZN-65

-5.71E+00 + 9.19E+00 1.17E+01 ZRNB-95 3.53E-01

+

5.52E+00 7.75E+00 ZRNB-95

-6.30E-01 + 5.63E+00 7.84E+00 I-131 2.61E-01

+

4.80E+00 7.11E+00 I-131 6.01E-01

+ 4.75E+00 6.99E+00 CS-134 4.70E-01

+

3.05E+00 4.22E+00 CS-134

-2.09E-01 + 2.80E+00 3.88E+00 CS-137

-2.02E+00 +

3.75E+00 5.08E+00 CS-137 8.54E-01

+ 2.86E+00 3.94E+00 BALA140

-1.93E+00 +

5.72E+00 7.38E+00 BALA140

-3.03E+00 + 5.25E+00 6.64E+00 BI-214 9.53E+00 +

7.47E+00 1.02E+01 BI-214 7.04E+00 + 7.26E+00 1.00E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 4 of 4

TABLE A-7.2 GAMMA SPECTROMETRY RESULTS OF RIVER/DRINKING WATER -

SUMMARY

Station 26 - Control Station 29 - Indicator Results in pCi/liter, corrected for decay during collection period Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 Ind 1.41E+01

-4.68E+01 1.20E+02 7.07E+01 12 2

K-40 Cntl 5.02E+00

-4.16E+01 6.72E+01 7.45E+01 12 1

CR-51 Ind 3.42E+00

-1.63E+01 2.18E+01 4.89E+01 12 0

CR-51 Cntl

-5.00E+00

-6.95E+01 1.70E+01 1.19E+03 12 0

MN-54 Ind

-8.39E-02

-3.33E+00 2.23E+00 4.99E+00 12 0

MN-54 Cntl 1.80E-01

-2.82E+00 1.58E+00 5.17E+00 12 0

CO-58 Ind

-7.60E-01

-2.17E+00 3.63E-01 5.17E+00 12 0

CO-58 Cntl 4.57E-02

-3.16E+00 9.44E+00 8.36E+00 12 0

FE-59 Ind 6.14E-01

-4.80E+00 7.81E+00 1.35E+01 12 0

FE-59 Cntl

-1.23E+01

-1.50E+02 6.60E+00 4.47E+01 12 0

CO-60 Ind 2.96E-01

-1.84E+00 2.07E+00 5.06E+00 12 0

CO-60 Cntl 9.03E-02

-2.24E+00 2.20E+00 5.16E+00 12 0

ZN-65 Ind

-3.26E+00

-7.50E+00 3.66E+00 1.22E+01 12 0

ZN-65 Cntl

-3.80E+00

-1.00E+01 1.19E+00 1.43E+01 12 0

ZRNB-95 Ind

-2.46E-01

-6.74E+00 5.07E+00 9.38E+00 12 0

ZRNB-95 Cntl

-1.64E-01

-3.79E+00 4.80E+00 9.07E+00 12 0

I-131 Ind 6.73E-01

-4.62E+00 9.78E+00 1.07E+01 12 0

I-131 Cntl

-4.71E-01

-3.27E+00 2.95E+00 7.80E+00 12 0

CS-134 Ind

-8.31E-01

-2.56E+00 1.07E+00 5.30E+00 12 0

CS-134 Cntl

-1.49E+00

-2.82E+00 3.22E-01 6.87E+00 12 0

CS-137 Ind

-9.92E-01

-3.20E+00 1.87E+00 5.78E+00 12 0

CS-137 Cntl 5.29E-01

-1.06E+00 3.40E+00 5.62E+00 12 0

BALA140 Ind 7.18E-02

-3.21E+00 2.89E+00 9.03E+00 12 0

BALA140 Cntl

-1.66E+00

-7.67E+00 1.84E+00 8.37E+00 12 0

BI-214 Ind 7.47E+00

-1.30E+00 2.92E+01 1.23E+01 12 2

BI-214 Cntl 1.30E+01

-6.45E+00 5.10E+01 1.26E+01 12 4

Ind = Indicator Station Cntl= Control Station Page 1 of 1

TABLE A-8.1 GAMMA SPECTROMETRY RESULTS OF SOIL Results in pCi/kilogram Location and Date Station 1 5/30/2023 Location and Date Station 1 10/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 2.87E+02 +

2.43E+02 3.19E+02 BE-7 2.33E+02 +

2.97E+02 2.56E+02 K-40

+

1.36E+04 +

9.18E+02 2.55E+02 K-40

+

1.39E+04 +

1.34E+04 2.45E+02 CR-51

-1.79E+01 +

2.66E+02 3.77E+02 CR-51

-5.98E+01 +

2.36E+02 3.20E+02 MN-54

-5.58E+00 +

3.10E+01 4.06E+01 MN-54 1.42E+01 +

2.72E+01 2.99E+01 CO-58

-1.98E+01 +

3.36E+01 4.29E+01 CO-58

-7.13E+00 +

2.36E+01 2.91E+01 FE-59

-5.25E+01 +

1.03E+02 1.25E+02 FE-59

-3.39E+01 +

8.33E+01 9.31E+01 CO-60 1.50E+01 +

2.80E+01 3.47E+01 CO-60 4.70E+00 +

2.36E+01 2.88E+01 ZN-65 2.74E+01 +

7.97E+01 1.00E+02 ZN-65

-3.70E+01 +

8.03E+01 1.20E+02 ZRNB-95 2.45E+01 +

4.61E+01 6.12E+01 ZRNB-95 1.56E+01 +

4.36E+01 5.41E+01 CS-134

-1.84E+01 +

4.72E+01 7.89E+01 CS-134 7.15E+00 +

3.76E+01 6.18E+01 CS-137

+

8.02E+01 +

2.82E+01 3.20E+01 CS-137

+

4.07E+01 +

4.87E+01 3.66E+01 BALA140 3.07E+00 +

2.81E+01 3.61E+01 BALA140 1.16E+00 +

3.14E+01 3.91E+01 BI-214

+

4.33E+02 +

7.64E+01 7.26E+01 BI-214

+

6.48E+02 +

6.28E+02 6.36E+01 Location and Date Station 7 5/30/2023 Location and Date Station 7 10/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 1.25E+02 +

2.23E+02 3.02E+02 BE-7 7.62E+01 +

2.39E+02 3.40E+02 K-40

+

3.22E+03 +

1.11E+03 1.74E+03 K-40

+

1.41E+04 +

9.51E+02 2.59E+02 CR-51

-1.69E+01 +

2.42E+02 3.44E+02 CR-51

-8.30E+01 +

2.76E+02 4.03E+02 MN-54 2.71E+01 +

2.53E+01 3.15E+01 MN-54 2.94E+00 +

2.82E+01 3.97E+01 CO-58

-2.26E+01 +

3.64E+01 4.64E+01 CO-58 2.02E+01 +

2.48E+01 3.33E+01 FE-59

-2.99E+01 +

9.52E+01 1.18E+02 FE-59 2.09E+01 +

8.58E+01 1.14E+02 CO-60 1.39E+01 +

2.65E+01 3.29E+01 CO-60 1.65E+00 +

3.06E+01 4.17E+01 ZN-65

-4.76E+01 +

8.52E+01 1.42E+02 ZN-65

-3.57E+01 +

8.66E+01 1.46E+02 ZRNB-95 1.23E+00 +

5.56E+01 7.53E+01 ZRNB-95

-3.53E+00 +

5.51E+01 7.74E+01 CS-134 1.16E+01 +

4.01E+01 6.73E+01 CS-134 1.43E+01 +

4.64E+01 7.79E+01 CS-137

+

4.41E+01 +

3.45E+01 4.36E+01 CS-137

+

5.36E+01 +

4.11E+01 5.36E+01 BALA140 1.08E+01 +

2.31E+01 2.90E+01 BALA140

-3.37E+01 +

5.05E+01 6.34E+01 BI-214

+

4.05E+02 +

8.02E+01 7.67E+01 BI-214

+

4.49E+02 +

7.32E+01 6.82E+01 Location and Date Station 5 5/30/2023 Location and Date Station 5 10/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 1.48E+01

+ 2.86E+02 3.98E+02 BE-7 3.99E+01

+

2.08E+02 2.93E+02 K-40

+

1.36E+04

+ 9.90E+02 3.22E+02 K-40

+

1.30E+04

+

7.37E+02 2.33E+02 CR-51

-1.49E+02 + 3.07E+02 4.29E+02 CR-51 3.31E+01

+

2.10E+02 3.06E+02 MN-54 1.66E+01

+ 2.71E+01 3.49E+01 MN-54

-5.64E-01

+

2.56E+01 3.53E+01 CO-58 2.50E+00

+ 3.15E+01 4.18E+01 CO-58

-1.05E+01 +

2.19E+01 2.98E+01 FE-59 2.00E+01

+ 8.38E+01 1.06E+02 FE-59

-3.69E+01 +

7.75E+01 9.93E+01 CO-60

-3.30E+01 + 4.81E+01 5.82E+01 CO-60 1.01E+01

+

2.13E+01 2.80E+01 ZN-65

-5.91E+01 + 1.11E+02 1.85E+02 ZN-65

-3.80E+01 +

7.92E+01 1.32E+02 ZRNB-95 1.93E+01

+ 6.26E+01 8.37E+01 ZRNB-95 4.07E+00

+

4.45E+01 6.14E+01 CS-134

-2.07E+01 + 6.09E+01 1.02E+02 CS-134

-1.16E+01 +

4.29E+01 7.16E+01 CS-137 4.62E+01

+ 4.22E+01 5.39E+01 CS-137

-8.51E+00 +

2.93E+01 3.99E+01 BALA140

-1.82E+01 + 4.07E+01 4.99E+01 BALA140

-2.66E+01 +

3.93E+01 4.89E+01 BI-214

+

7.06E+02

+ 1.07E+02 9.20E+01 BI-214

+

7.08E+02

+

7.16E+01 6.01E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 2

Location and Date Station 21 5/30/2023 Location and Date Station 21 10/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 1.68E+02

+ 2.02E+02 2.70E+02 BE-7 1.33E+02 +

2.19E+02 2.95E+02 K-40

+

1.14E+04

+ 7.04E+02 2.50E+02 K-40

+

1.19E+04 +

7.61E+02 3.06E+02 CR-51 7.36E+01

+ 2.01E+02 2.81E+02 CR-51

-1.14E+01 +

2.23E+02 3.14E+02 MN-54 0.00E+00

+ 7.87E+00 3.15E+01 MN-54 2.51E+00 +

2.59E+01 3.48E+01 CO-58 7.41E+00

+ 2.17E+01 2.89E+01 CO-58

-8.89E+00 +

2.67E+01 3.54E+01 FE-59 1.19E+01

+ 6.77E+01 8.64E+01 FE-59

-4.19E-01 +

7.18E+01 9.26E+01 CO-60

-3.28E-01

+ 2.68E+01 3.38E+01 CO-60 1.77E+01 +

2.70E+01 3.28E+01 ZN-65

-2.73E+01 + 6.58E+01 1.10E+02 ZN-65

-1.73E+01 +

6.70E+01 1.13E+02 ZRNB-95 2.11E+00

+ 4.07E+01 5.50E+01 ZRNB-95 2.31E-01 +

4.69E+01 6.33E+01 CS-134

-1.53E+01 + 3.80E+01 6.33E+01 CS-134

-1.52E+01 +

4.07E+01 6.78E+01 CS-137 3.54E+01

+ 2.82E+01 3.58E+01 CS-137

-1.34E-01 +

2.88E+01 3.88E+01 BALA140

-2.46E+01 + 3.59E+01 4.25E+01 BALA140

-7.24E+00 +

3.14E+01 3.88E+01 BI-214

+

3.94E+02

+ 5.54E+01 5.17E+01 BI-214

+

4.11E+02 +

6.72E+01 6.55E+01 Location and Date ST-Cntl 9a 5/30/2023 Location and Date ST-Cntl 9a 10/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 6.73E+01 +

2.22E+02 3.01E+02 BE-7 1.98E+02 + 2.68E+02 2.50E+02 K-40

+

1.25E+04 +

7.54E+02 2.91E+02 K-40

+

1.24E+04 + 1.19E+04 2.39E+02 CR-51 2.83E+01 +

1.93E+02 2.72E+02 CR-51 3.58E+01 + 2.08E+02 2.89E+02 MN-54 7.27E-01 +

2.46E+01 3.32E+01 MN-54

-4.59E+00 + 2.42E+01 3.08E+01 CO-58 6.07E+00 +

2.37E+01 3.16E+01 CO-58 3.59E+00 + 2.14E+01 2.75E+01 FE-59 9.97E+00 +

6.77E+01 8.65E+01 FE-59

-1.77E+01 + 7.54E+01 9.02E+01 CO-60

-2.08E+01 +

3.14E+01 3.79E+01 CO-60

-1.95E+01 + 3.47E+01 3.52E+01 ZN-65

-5.76E+00 +

7.07E+01 1.20E+02 ZN-65

-8.77E+00 + 6.30E+01 1.06E+02 ZRNB-95

-1.04E+01 +

4.34E+01 5.79E+01 ZRNB-95 2.18E+01 + 4.52E+01 5.25E+01 CS-134

-1.44E+01 +

3.99E+01 6.65E+01 CS-134

-9.44E+00 + 3.77E+01 6.10E+01 CS-137

+

6.17E+01 +

3.20E+01 3.95E+01 CS-137 1.25E+01 + 3.14E+01 3.80E+01 BALA140 1.10E+00 +

3.08E+01 3.83E+01 BALA140 1.32E+01 + 2.78E+01 3.01E+01 BI-214

+

5.13E+02 +

6.23E+01 5.48E+01 BI-214

+

5.37E+02 + 5.21E+02 5.84E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 2

TABLE A-8.2 GAMMA SPECTROMETRY RESULTS OF SOIL -

SUMMARY

Results in pCi/kilogram Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs BALA140 Ind

-1.19E+01

-3.37E+01 1.08E+01 4.35E+01 8

0 BALA140 Cntl 1.10E+00 1.10E+00 1.32E+01 3.42E+01 2

0 BE-7 Ind 1.35E+02 1.48E+01 2.87E+02 3.09E+02 8

0 BE-7 Cntl 1.32E+02 6.73E+01 1.98E+02 2.76E+02 2

0 BI-214 Ind 5.19E+02 3.94E+02 7.08E+02 6.88E+01 8

8 BI-214 Cntl 5.13E+02 5.13E+02 5.37E+02 5.66E+01 2

2 CO-58 Ind

-4.84E+00

-2.26E+01 2.02E+01 3.59E+01 8

0 CO-58 Cntl 6.07E+00 3.59E+00 6.07E+00 2.95E+01 2

0 CO-60 Ind 3.73E+00

-3.30E+01 1.77E+01 3.64E+01 8

0 CO-60 Cntl

-2.08E+01

-2.08E+01

-1.95E+01 3.66E+01 2

0 CR-51 Ind

-2.89E+01

-1.49E+02 7.36E+01 3.47E+02 8

0 CR-51 Cntl 2.83E+01 2.83E+01 3.58E+01 2.80E+02 2

0 CS-134 Ind

-6.01E+00

-2.07E+01 1.43E+01 7.38E+01 8

0 CS-134 Cntl

-1.44E+01

-1.44E+01

-9.44E+00 6.37E+01 2

0 CS-137 Ind 3.65E+01

-8.51E+00 8.02E+01 4.18E+01 8

4 CS-137 Cntl 6.17E+01 1.25E+01 6.17E+01 3.88E+01 2

1 FE-59 Ind

-1.26E+01

-5.25E+01 2.09E+01 1.04E+02 8

0 FE-59 Cntl 9.97E+00

-1.77E+01 9.97E+00 8.84E+01 2

0 K-40 Ind 1.18E+04 3.22E+03 1.41E+04 4.51E+02 8

8 K-40 Cntl 1.25E+04 1.24E+04 1.25E+04 2.65E+02 2

2 MN-54 Ind 7.14E+00

-5.58E+00 2.71E+01 3.48E+01 8

0 MN-54 Cntl 7.27E-01

-4.59E+00 7.27E-01 3.20E+01 2

0 ZN-65 Ind

-2.93E+01

-5.91E+01 2.74E+01 1.31E+02 8

0 ZN-65 Cntl

-5.76E+00

-8.77E+00

-5.76E+00 1.13E+02 2

0 ZRNB-95 Ind 7.93E+00

-3.53E+00 2.45E+01 6.64E+01 8

0 ZRNB-95 Cntl

-1.04E+01

-1.04E+01 2.18E+01 5.52E+01 2

0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-9.1 GAMMA SPECTROMETRY RESULTS OF SEDIMENT Results in pCi/kilogram dry material Station 34 Downstream Indicator Location & Date Station 34 3/9/2023 Location & Date Station 34 10/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 1.53E+02 +

2.59E+02 3.49E+02 BE-7 2.47E+02 +

2.95E+02 4.06E+02 K-40

+

1.54E+04 +

9.21E+02 3.46E+02 K-40

+

1.28E+04 +

9.33E+02 4.18E+02 CR-51 2.61E+01 +

2.81E+02 3.95E+02 CR-51 6.72E+01 +

2.69E+02 3.92E+02 MN-54 2.06E+00 +

3.08E+01 4.13E+01 MN-54 6.60E+00 +

3.39E+01 4.69E+01 CO-58 6.04E+00 +

3.13E+01 4.18E+01 CO-58 3.81E+00 +

3.36E+01 4.68E+01 FE-59 2.32E+01 +

8.78E+01 1.11E+02 FE-59 2.30E+01 +

8.52E+01 1.12E+02 CO-60

-1.86E+01 +

3.60E+01 4.40E+01 CO-60 1.93E+00 +

3.12E+01 4.26E+01 ZN-65 4.91E+01 +

7.54E+01 1.25E+02 ZN-65 1.32E+01 +

9.96E+01 1.69E+02 ZRNB-95

-1.11E+01 +

5.92E+01 7.89E+01 ZRNB-95 1.58E+01 +

5.06E+01 7.01E+01 CS-134 7.33E-01 +

4.64E+01 7.81E+01 CS-134 6.25E-01 +

6.23E+01 1.05E+02 CS-137

+

7.20E+01 +

2.63E+01 3.18E+01 CS-137

+

1.68E+02 +

4.97E+01 5.28E+01 BALA140

-1.54E+00 +

4.34E+01 5.40E+01 BALA140

-7.55E+00 +

4.61E+01 5.99E+01 BI-214

+

6.00E+02 +

7.77E+01 7.06E+01 BI-214

+

8.87E+02 +

1.15E+02 1.03E+02 Station 33 Upstream Control Location & Date Station 33 3/9/2023 Location & Date Station 33 10/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

-2.97E+01 +

2.91E+02 3.96E+02 BE-7 6.84E+01 +

2.86E+02 3.90E+02 K-40

+

1.16E+04 +

7.30E+02 3.14E+02 K-40

+

1.54E+04 +

9.60E+02 3.51E+02 CR-51

-6.90E+01 +

3.05E+02 4.25E+02 CR-51 1.72E+02 +

2.79E+02 3.87E+02 MN-54

-9.68E+00 +

3.42E+01 4.50E+01 MN-54 1.80E+01 +

2.85E+01 3.74E+01 CO-58

-3.17E+00 +

2.84E+01 3.79E+01 CO-58

-1.22E+01 +

3.41E+01 4.52E+01 FE-59

-2.33E+00 +

8.04E+01 1.02E+02 FE-59

-2.12E+00 +

9.29E+01 1.20E+02 CO-60 2.00E+01 +

2.82E+01 3.41E+01 CO-60 9.61E+00 +

3.17E+01 3.96E+01 ZN-65

-2.10E+01 +

8.39E+01 1.41E+02 ZN-65

-3.66E+01 +

9.38E+01 1.57E+02 ZRNB-95 3.33E+01 +

5.81E+01 7.59E+01 ZRNB-95

-2.91E-01 +

5.68E+01 7.67E+01 CS-134

-2.53E+00 +

5.19E+01 8.68E+01 CS-134

-1.92E+01 +

5.01E+01 8.35E+01 CS-137 3.55E+01 +

4.31E+01 5.56E+01 CS-137 5.28E+01 +

4.42E+01 5.63E+01 BALA140

-2.41E+01 +

5.19E+01 6.17E+01 BALA140 4.71E+00 +

3.63E+01 4.56E+01 BI-214

+

9.87E+02 +

9.24E+01 7.76E+01 BI-214

+

5.40E+02 +

7.89E+01 7.78E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE A-9.2 GAMMA SPECTROMETRY RESULTS OF SEDIMENT -

SUMMARY

Results in pCi/kilogram dry material Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs BALA140 Ind

-4.55E+00 -7.55E+00

-1.54E+00 5.70E+01 2

0 BALA140 Cntl

-9.71E+00 -2.41E+01 4.71E+00 5.37E+01 2

0 BE-7 Ind 2.00E+02 1.53E+02 2.47E+02 3.78E+02 2

0 BE-7 Cntl 1.94E+01 -2.97E+01 6.84E+01 3.93E+02 2

0 BI-214 Ind 7.43E+02 6.00E+02 8.87E+02 8.67E+01 2

2 BI-214 Cntl 7.63E+02 5.40E+02 9.87E+02 7.77E+01 2

2 CO-58 Ind 4.92E+00 3.81E+00 6.04E+00 4.43E+01 2

0 CO-58 Cntl

-7.68E+00 -1.22E+01

-3.17E+00 4.15E+01 2

0 CO-60 Ind

-8.36E+00 -1.86E+01 1.93E+00 4.33E+01 2

0 CO-60 Cntl 1.48E+01 9.61E+00 2.00E+01 3.68E+01 2

0 CR-51 Ind 4.67E+01 2.61E+01 6.72E+01 3.94E+02 2

0 CR-51 Cntl 5.17E+01 -6.90E+01 1.72E+02 4.06E+02 2

0 CS-134 Ind 6.79E-01 6.25E-01 7.33E-01 9.14E+01 2

0 CS-134 Cntl

-1.08E+01 -1.92E+01

-2.53E+00 8.51E+01 2

0 CS-137 Ind 1.20E+02 7.20E+01 1.68E+02 4.23E+01 2

2 CS-137 Cntl 4.41E+01 3.55E+01 5.28E+01 5.60E+01 2

0 FE-59 Ind 2.31E+01 2.30E+01 2.32E+01 1.12E+02 2

0 FE-59 Cntl

-2.23E+00 -2.33E+00

-2.12E+00 1.11E+02 2

0 K-40 Ind 1.41E+04 1.28E+04 1.54E+04 3.82E+02 2

2 K-40 Cntl 1.35E+04 1.16E+04 1.54E+04 3.32E+02 2

2 MN-54 Ind 4.33E+00 2.06E+00 6.60E+00 4.41E+01 2

0 MN-54 Cntl 4.18E+00 -9.68E+00 1.80E+01 4.12E+01 2

0 ZN-65 Ind 3.12E+01 1.32E+01 4.91E+01 1.47E+02 2

0 ZN-65 Cntl

-2.88E+01 -3.66E+01

-2.10E+01 1.49E+02 2

0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-10.1 GAMMA SPECTROMETRY RESULTS OF FISH Station 30 Columbia River - Station 38 Snake River Results in pCi/kilogram (wet)

Location &

Species Collection Date Nuclide RQ Activity Error MDA Salmon 10/11/23 K-40

+

3.22E+03

+

3.51E+02 1.49E+02 Station 30 MN-54

-6.38E-01

+

1.32E+01 1.86E+01 Indicator CO-58 7.74E+00

+

1.47E+01 2.00E+01 FE-59 1.08E+01

+

5.79E+01 7.73E+01 CO-60

-6.16E+00

+

1.71E+01 2.23E+01 ZN-65

-4.47E+00

+

3.62E+01 6.33E+01 ZRNB-95 4.59E+00

+

2.84E+01 3.98E+01 CS-134

-4.02E+00

+

1.84E+01 3.12E+01 CS-137 8.84E+00

+

1.60E+01 2.19E+01 Bi-214

+

8.40E+01

+

2.82E+01 3.11E+01 Bass 11/16/23 K-40

+

4.18E+03

+

4.49E+02 2.24E+02 Station 30 MN-54 1.79E+00

+

1.39E+01 1.96E+01 Indicator CO-58

-3.78E+00

+

1.57E+01 2.23E+01 FE-59

-1.00E+00

+

4.24E+01 5.95E+01 CO-60

-1.23E+01

+

2.03E+01 2.65E+01 ZN-65

-1.45E+01

+

4.96E+01 6.53E+01 ZRNB-95

-9.18E+00

+

2.86E+01 4.02E+01 CS-134

-1.80E+00

+

1.38E+01 1.97E+01 CS-137 6.51E+00

+

1.54E+01 2.15E+01 Bi-214 2.40E+01

+

3.19E+01 4.58E+01 Salmon 10/19/23 K-40

+

2.68E+03

+

2.65E+02 1.20E+02 Station 38 MN-54

-3.33E+00

+

8.87E+00 1.21E+01 Control CO-58

-2.48E+00

+

1.03E+01 1.46E+01 FE-59

-1.92E+01

+

4.38E+01 5.75E+01 CO-60

-3.46E+00

+

1.13E+01 1.51E+01 ZN-65

-1.76E+01

+

3.39E+01 4.36E+01 ZRNB-95

-8.76E-01

+

1.70E+01 2.47E+01 CS-134

-3.95E+00

+

1.14E+01 1.93E+01 CS-137 1.38E+01

+

1.14E+01 1.45E+01 Bi-214

+

5.22E+01

+

1.60E+01 1.76E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE A-10.2 GAMMA SPECTROMETRY RESULTS OF FISH -

SUMMARY

Results in pCi/kilogram (wet)

Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs Bi-214 Ind 5.40E+01 2.40E+01 8.40E+01 3.85E+01 2

1 Bi-214 Cntl 5.22E+01 5.22E+01 5.22E+01 1.76E+01 1

1 CO-58 Ind 1.98E+00

-3.78E+00 7.74E+00 2.11E+01 2

0 CO-58 Cntl

-2.48E+00

-2.48E+00

-2.48E+00 1.46E+01 1

0 CO-60 Ind

-9.22E+00

-1.23E+01

-6.16E+00 2.44E+01 2

0 CO-60 Cntl

-3.46E+00

-3.46E+00

-3.46E+00 1.51E+01 1

0 CS-134 Ind

-2.91E+00

-4.02E+00

-1.80E+00 2.55E+01 2

0 CS-134 Cntl

-3.95E+00

-3.95E+00

-3.95E+00 1.93E+01 1

0 CS-137 Ind 7.67E+00 6.51E+00 8.84E+00 2.17E+01 2

0 CS-137 Cntl 1.38E+01 1.38E+01 1.38E+01 1.45E+01 1

0 FE-59 Ind 4.89E+00

-1.00E+00 1.08E+01 6.84E+01 2

0 FE-59 Cntl

-1.92E+01

-1.92E+01

-1.92E+01 5.75E+01 1

0 K-40 Ind 3.70E+03 3.22E+03 4.18E+03 1.86E+02 2

2 K-40 Cntl 2.68E+03 2.68E+03 2.68E+03 1.20E+02 1

1 MN-54 Ind 5.74E-01

-6.38E-01 1.79E+00 1.91E+01 2

0 MN-54 Cntl

-3.33E+00

-3.33E+00

-3.33E+00 1.21E+01 1

0 ZN-65 Ind

-9.49E+00

-1.45E+01

-4.47E+00 6.43E+01 2

0 ZN-65 Cntl

-1.76E+01

-1.76E+01

-1.76E+01 4.36E+01 1

0 ZRNB-95 Ind

-2.29E+00

-9.18E+00 4.59E+00 4.00E+01 2

0 ZRNB-95 Cntl

-8.76E-01

-8.76E-01

-8.76E-01 2.47E+01 1

0 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE A-11.1 IODINE-131 IN MILK Results in pCi/liter, decay corrected to sample collection time Stations 36 Indicator Station 9B Control Collection Date RQ I-131 Activity Error I-131 MDA RQ I-131 Activity Error I-131 MDA 01/24/23

-1.33E-01

+

3.58E-01 4.16E-01

-4.43E-02

+

1.76E-04 4.63E-01 02/21/23

-4.36E-01

+

7.51E-01 1.04E+00

-2.00E-01

+

9.37E-04 6.49E-01 03/14/23

-2.09E-01

+

5.16E-01 7.14E-01

-2.52E-01

+

1.20E-03 6.61E-01 04/04/23

-6.57E-02

+

7.01E-01 9.85E-01

-3.46E-01

+

2.37E-03 9.50E-01 04/18/23 1.82E-01

+

7.39E-01 1.03E+00 2.39E-01

+

1.09E-03 6.33E-01 05/09/23 7.92E-02

+

4.82E-01 6.71E-01 1.38E-01

+

7.16E-04 6.04E-01 05/23/23

-1.90E-02

+

7.26E-01 1.02E+00

-1.02E-01

+

6.69E-04 9.20E-01 06/06/23 1.95E-01

+

6.01E-01 8.40E-01

-1.89E-01

+

7.18E-04 4.41E-01 06/20/23 1.82E-01

+

3.13E-01 3.63E-01

-4.23E-02

+

2.63E-04 8.74E-01 07/11/23 1.23E-01

+

3.58E-01 4.16E-01 6.06E-02

+

1.98E-04 3.80E-01 07/25/23

-5.37E-02

+

4.98E-01 6.94E-01 6.83E-03

+

2.93E-05 5.99E-01 08/08/23

-3.19E-02

+

4.68E-01 6.54E-01

-7.87E-02

+

3.49E-04 6.17E-01 08/22/23 7.17E-02

+

5.99E-01 8.43E-01

-2.92E-02

+

1.04E-04 4.14E-01 09/05/23 6.95E-02

+

3.38E-01 3.87E-01 1.37E-01

+

8.19E-04 8.37E-01 09/19/23 1.09E-01

+

3.54E-01 3.94E-01

-1.14E-01

+

4.13E-04 4.00E-01 10/17/23

-1.98E-02

+

2.88E-01 4.18E-01

-1.90E-01

+

7.74E-04 4.20E-01 11/14/23

-3.56E-03

+

1.59E-02 1.80E-02 3.99E-03

+

1.09E-06 3.84E-02 12/05/23

-8.40E-02

+

4.62E-01 6.43E-01

-5.63E-02

+

1.94E-04 3.96E-01 TABLE A-11.2 IODINE-131 IN MILK -

SUMMARY

Results in pCi/liter, decay corrected to sample collection time Location Average Activity Activity Low Activity High Average MDA Number Samples Number Positive IDs Indicator-ST 36

-2.47E-03

-4.36E-01 1.95E-01 6.41E-01 18 0

Control - ST-9B

-5.88E-02

-3.46E-01 2.39E-01 5.72E-01 18 0

RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 36 - Indicator Results in pCi/liter Collection Date: 1/24/2023 Collection Date: 2/21/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.07E+00 + 6.29E+00 8.76E+00 BA-133

-3.36E+00 + 6.55E+00 9.10E+00 CO-60 2.09E+00 + 4.56E+00 5.82E+00 CO-60 2.28E-01 + 5.01E+00 6.56E+00 ZN-65

-4.19E+00 + 1.20E+01 1.55E+01 ZN-65

-5.43E+00 + 1.14E+01 1.46E+01 MN-54

-2.27E+00 + 5.26E+00 6.95E+00 MN-54

-2.67E-02 + 4.83E+00 6.55E+00 CS-134 6.42E-01

+ 4.11E+00 5.68E+00 CS-134

-2.93E+00 + 4.88E+00 6.57E+00 CS-137 1.13E+00 + 4.62E+00 6.38E+00 CS-137 2.90E+00 + 5.27E+00 7.14E+00 BALA140 0.00E+00 + 2.25E+00 7.94E+00 BALA140

-5.74E+00 + 8.26E+00 9.99E+00 K-40

+

1.61E+03 + 1.27E+02 6.99E+01 K-40

+

1.31E+03 + 1.18E+02 7.32E+01 FE-59 4.84E+00 + 1.28E+01 1.63E+01 FE-59 6.52E+00 + 1.15E+01 1.45E+01 ZRNB-95

-2.67E+00 + 8.06E+00 1.08E+01 ZRNB-95 5.93E-01 + 7.74E+00 1.05E+01 BE-7

-1.50E+01 + 4.01E+01 5.46E+01 BE-7

-1.96E+01 + 4.14E+01 5.61E+01 Collection Date: 3/14/2023 Collection Date:

4/4/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.24E+00 + 6.22E+00 8.65E+00 BA-133

-3.38E+00 + 7.14E+00 1.19E+01 CO-60

-1.18E+00 + 5.79E+00 7.43E+00 CO-60 2.66E+00 + 4.60E+00 5.82E+00 ZN-65

-2.62E+00 + 1.14E+01 1.49E+01 ZN-65

-7.31E+00 + 1.28E+01 1.63E+01 MN-54

-3.15E+00 + 5.50E+00 7.22E+00 MN-54

-6.95E-01 + 4.88E+00 6.57E+00 CS-134 1.18E+00 + 4.28E+00 5.88E+00 CS-134 2.99E-01 + 5.11E+00 8.69E+00 CS-137 5.67E-01

+ 4.14E+00 5.79E+00 CS-137

-9.24E-01 + 4.88E+00 6.75E+00 BALA140

-1.89E+00 + 6.34E+00 7.97E+00 BALA140

-1.68E+00 + 6.89E+00 8.68E+00 K-40

+

1.26E+03 + 1.14E+02 7.30E+01 K-40

+

1.51E+03 + 1.27E+02 7.78E+01 FE-59

-8.70E-01 + 1.24E+01 1.61E+01 FE-59 1.41E+00 + 1.37E+01 1.77E+01 ZRNB-95

-9.58E-01 + 8.31E+00 1.12E+01 ZRNB-95 1.24E+00 + 7.99E+00 1.08E+01 BE-7

-1.19E+01 + 4.11E+01 5.61E+01 BE-7 2.67E+01 + 3.70E+01 4.96E+01 Collection Date: 4/18/2023 Collection Date:

5/9/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.16E+00 + 6.04E+00 8.41E+00 BA-133

-2.88E+00 + 5.72E+00 7.97E+00 CO-60 2.85E+00 + 4.62E+00 5.82E+00 CO-60

-1.48E+00 + 5.11E+00 6.57E+00 ZN-65 7.19E-01

+ 9.35E+00 1.25E+01 ZN-65 1.71E+00 + 1.07E+01 1.41E+01 MN-54 5.07E-01

+ 4.86E+00 6.55E+00 MN-54 9.11E-01 + 4.49E+00 6.06E+00 CS-134 6.41E-01

+ 4.35E+00 6.01E+00 CS-134 0.00E+00 + 3.29E+00 5.75E+00 CS-137

-3.51E+00 + 6.17E+00 8.33E+00 CS-137 2.64E-01 + 5.21E+00 7.23E+00 BALA140

-1.95E+00 + 6.08E+00 7.65E+00 BALA140

-5.37E-02 + 6.20E+00 8.04E+00 K-40

+

1.24E+03 + 1.13E+02 7.16E+01 K-40

+

1.31E+03 + 1.23E+02 8.11E+01 FE-59 3.40E+00 + 1.13E+01 1.45E+01 FE-59 1.34E+00 + 1.28E+01 1.65E+01 ZRNB-95 2.28E-01

+ 8.14E+00 1.10E+01 ZRNB-95 4.24E+00 + 7.67E+00 1.01E+01 BE-7 8.54E-01

+ 3.69E+01 5.10E+01 BE-7 2.10E+01 + 3.94E+01 5.32E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1 of 6

Collection Date: 5/23/2023 Collection Date:

6/6/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.20E+00 + 6.41E+00 8.92E+00 BA-133

-2.90E+00 + 5.74E+00 7.95E+00 CO-60 3.79E-02

+ 4.99E+00 6.56E+00 CO-60 1.92E+00 + 3.95E+00 4.85E+00 ZN-65 1.18E+00 + 1.04E+01 1.38E+01 ZN-65 2.54E+00 + 8.43E+00 1.07E+01 MN-54 8.54E-01

+ 4.64E+00 6.25E+00 MN-54 9.80E-01 + 3.45E+00 4.61E+00 CS-134 1.07E-01

+ 4.28E+00 5.94E+00 CS-134

-2.63E+00 + 4.32E+00 5.80E+00 CS-137

-3.32E+00 + 5.67E+00 7.66E+00 CS-137

-6.49E-01 + 3.30E+00 4.57E+00 BALA140

-4.65E+00 + 7.30E+00 8.89E+00 BALA140 1.66E-01 + 4.27E+00 5.35E+00 K-40

+

1.45E+03 + 1.23E+02 7.47E+01 K-40

+

1.39E+03 + 1.02E+02 5.28E+01 FE-59 1.22E+00 + 1.32E+01 1.70E+01 FE-59 2.55E+00 + 9.58E+00 1.22E+01 ZRNB-95 5.02E-01

+ 8.01E+00 1.09E+01 ZRNB-95

-3.22E+00 + 7.18E+00 9.45E+00 BE-7 5.12E+00 + 3.51E+01 4.85E+01 BE-7 3.71E+00 + 2.76E+01 3.80E+01 Location & Date ection Date: 6/20/2023 Collection Date: 7/11/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.12E+00 + 6.10E+00 8.49E+00 BA-133

-3.90E+00 + 8.13E+00 1.14E+01 CO-60 8.72E-01

+ 5.24E+00 6.79E+00 CO-60 2.46E-01 + 7.12E+00 9.21E+00 ZN-65

-3.27E+00 + 1.25E+01 1.63E+01 ZN-65 1.06E+01 + 1.14E+01 1.39E+01 MN-54

-2.45E+00 + 5.04E+00 6.65E+00 MN-54 2.88E+00 + 4.83E+00 6.44E+00 CS-134 0.00E+00 + 2.42E+00 6.20E+00 CS-134

-1.27E+00 + 5.62E+00 7.81E+00 CS-137 1.19E+00 + 4.91E+00 6.78E+00 CS-137

-1.78E+00 + 6.30E+00 8.77E+00 BALA140

-5.57E+00 + 8.02E+00 9.70E+00 BALA140

-3.12E+00 + 7.41E+00 9.20E+00 K-40

+

1.27E+03 + 1.18E+02 7.90E+01 K-40

+

1.34E+03 + 1.39E+02 6.38E+01 FE-59 8.25E+00 + 1.25E+01 1.56E+01 FE-59

-1.16E+01 + 1.73E+01 2.17E+01 ZRNB-95 3.78E+00 + 7.19E+00 9.53E+00 ZRNB-95 3.89E+00 + 7.82E+00 1.06E+01 BE-7

-2.05E+01 + 4.08E+01 5.52E+01 BE-7

-3.16E+01 + 5.65E+01 7.65E+01 Location & Date ection Date: 7/26/2023 Collection Date:

8/8/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.68E+00 + 8.16E+00 1.03E+01 BA-133

-4.30E+00 + 1.00E+01 1.28E+01 CO-60

-1.72E+00 + 6.64E+00 8.22E+00 CO-60 3.23E+00 + 6.00E+00 6.42E+00 ZN-65 2.24E+00 + 1.44E+01 1.84E+01 ZN-65

-1.13E+01 + 2.08E+01 2.20E+01 MN-54

-3.41E+00 + 6.99E+00 8.20E+00 MN-54

-3.06E+00 + 7.13E+00 8.65E+00 CS-134 5.44E-01

+ 4.50E+00 6.34E+00 CS-134

-3.81E+00 + 7.53E+00 8.91E+00 CS-137

-4.45E-01 + 5.37E+00 7.64E+00 CS-137

-8.90E-01 + 6.04E+00 8.43E+00 BALA140 2.23E+00 + 5.11E+00 5.91E+00 BALA140 7.85E-01 + 4.69E+00 6.23E+00 K-40

+

1.27E+03 + 1.23E+03 7.82E+01 K-40

+

1.24E+03 + 1.20E+03 8.66E+01 FE-59 7.22E+00 + 1.31E+01 1.42E+01 FE-59

-2.83E-01 + 1.55E+01 2.07E+01 ZRNB-95 2.72E+00 + 8.07E+00 1.05E+01 ZRNB-95 1.45E+00 + 1.01E+01 1.38E+01 BE-7

-1.46E+00 + 3.79E+01 5.39E+01 BE-7

-2.37E+01 + 5.26E+01 6.49E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

2 of 6

Location & Date ection Date: 8/22/2023 Collection Date:

9/5/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-2.52E+00 + 5.61E+00 7.04E+00 BA-133

-3.42E+00 + 6.64E+00 9.23E+00 CO-60 8.45E-01

+ 4.84E+00 5.93E+00 CO-60 1.67E+00 + 4.93E+00 6.32E+00 ZN-65 4.72E+00 + 9.94E+00 1.10E+01 ZN-65

-4.25E+00 + 1.26E+01 1.63E+01 MN-54 2.22E-01

+ 3.72E+00 5.00E+00 MN-54 2.40E-01 + 5.21E+00 7.03E+00 CS-134

-2.28E+00 + 4.35E+00 5.05E+00 CS-134

-2.67E+00 + 4.45E+00 6.01E+00 CS-137 1.02E+00 + 4.09E+00 5.44E+00 CS-137 2.11E+00 + 4.70E+00 6.41E+00 BALA140 1.63E+00 + 2.97E+00 3.09E+00 BALA140

-4.02E+00 + 6.75E+00 8.27E+00 K-40

+

1.27E+03 + 1.23E+03 5.04E+01 K-40

+

1.32E+03 + 1.14E+02 6.77E+01 FE-59

-1.95E+00 + 1.02E+01 1.28E+01 FE-59

-1.91E+00 + 1.40E+01 1.79E+01 ZRNB-95 8.27E-01

+ 5.67E+00 7.57E+00 ZRNB-95 2.74E-01 + 7.28E+00 9.93E+00 BE-7

-4.93E+00 + 2.72E+01 3.69E+01 BE-7

-5.12E+00 + 3.77E+01 5.19E+01 Location & Date ection Date: 9/19/2023 Collection Date: 10/17/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.40E+00 + 6.56E+00 9.11E+00 BA-133

-3.44E+00 + 1.01E+01 1.68E+01 CO-60 6.07E-01

+ 5.04E+00 6.56E+00 CO-60

-2.17E+00 + 6.12E+00 8.42E+00 ZN-65 4.64E+00 + 9.62E+00 1.25E+01 ZN-65

-6.24E+00 + 1.58E+01 2.66E+01 MN-54

-4.27E-01 + 4.45E+00 6.03E+00 MN-54 3.67E+00 + 4.31E+00 5.61E+00 CS-134 1.07E+00 + 3.63E+00 5.01E+00 CS-134 2.44E+00 + 7.80E+00 1.31E+01 CS-137 1.32E-01

+ 4.84E+00 6.75E+00 CS-137

-1.54E+00 + 6.37E+00 8.82E+00 BALA140

-1.59E+00 + 6.55E+00 8.24E+00 BALA140

-4.62E+00 + 7.95E+00 1.01E+01 K-40

+

1.18E+03 + 1.12E+02 7.47E+01 K-40

+

1.50E+03 + 1.44E+02 8.32E+01 FE-59 6.17E+00 + 1.19E+01 1.50E+01 FE-59 1.24E-01 + 1.49E+01 2.02E+01 ZRNB-95

-1.73E+00 + 7.93E+00 1.07E+01 ZRNB-95 2.31E+00 + 8.01E+00 1.12E+01 BE-7

-8.52E-01 + 3.93E+01 5.42E+01 BE-7 1.28E+01 + 4.06E+01 5.78E+01 Location & Date ection Date: 11/14/2023 Collection Date: 12/5/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-2.14E+00 + 6.69E+00 1.12E+01 BA-133

-3.20E+00 + 6.30E+00 8.76E+00 CO-60 8.72E-01

+ 5.24E+00 6.79E+00 CO-60

-6.07E-01 + 5.75E+00 7.43E+00 ZN-65

-9.19E+00 + 1.38E+01 1.75E+01 ZN-65 3.92E+00 + 1.03E+01 1.34E+01 MN-54

-8.54E-01 + 4.55E+00 6.14E+00 MN-54

-2.93E-01 + 4.44E+00 6.03E+00 CS-134 5.34E-01

+ 4.35E+00 6.01E+00 CS-134

-3.09E+00 + 5.14E+00 6.91E+00 CS-137

-2.77E+00 + 5.04E+00 6.83E+00 CS-137

-2.64E-01 + 4.84E+00 6.75E+00 BALA140

-2.26E+00 + 6.85E+00 8.54E+00 BALA140

-1.83E+00 + 6.55E+00 8.22E+00 K-40

+

1.23E+03 + 1.21E+02 7.97E+01 K-40

+

1.26E+03 + 1.18E+02 7.59E+01 FE-59 6.25E+00 + 1.10E+01 1.39E+01 FE-59

-2.43E+00 + 1.47E+01 1.88E+01 ZRNB-95

-9.11E-01 + 7.46E+00 1.01E+01 ZRNB-95

-5.01E-01 + 7.58E+00 1.03E+01 BE-7 3.41E+00 + 3.65E+01 5.04E+01 BE-7

-2.04E+01 + 4.17E+01 5.64E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

3 of 6

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 9B - Control Results in pCi/liter Collection Date: 1/24/2023 Collection Date: 2/21/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.62E+00 + 7.17E+00 9.95E+00 BA-133

-3.32E+00 + 6.77E+00 9.41E+00 CO-60 1.52E-01

+ 4.81E+00 6.32E+00 CO-60 1.90E+00 + 3.86E+00 4.95E+00 ZN-65

-5.56E+00 + 1.27E+01 1.63E+01 ZN-65 1.31E+00 + 1.14E+01 1.50E+01 MN-54

-1.31E+00 + 5.13E+00 6.85E+00 MN-54

-5.62E-01 + 4.87E+00 6.57E+00 CS-134

-8.55E-01 + 4.32E+00 5.95E+00 CS-134

-1.07E-01 + 3.86E+00 5.40E+00 CS-137 1.06E+00 + 4.54E+00 6.29E+00 CS-137 1.06E+00 + 4.49E+00 6.22E+00 BALA140 2.96E+00 + 3.60E+00 3.80E+00 BALA140

-3.22E+00 + 7.06E+00 8.74E+00 K-40

+

1.39E+03 + 1.28E+02 8.52E+01 K-40

+

1.34E+03 + 1.18E+02 7.30E+01 FE-59

-4.97E+00 + 1.59E+01 2.01E+01 FE-59 1.25E+01 + 1.17E+01 1.41E+01 ZRNB-95 5.48E-01

+ 8.56E+00 1.16E+01 ZRNB-95 1.94E+00 + 7.31E+00 9.84E+00 BE-7 7.69E+00 + 3.72E+01 5.11E+01 BE-7 2.51E+01 + 3.73E+01 5.01E+01 Collection Date: 3/14/2023 Collection Date:

4/4/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-2.99E+00 + 6.13E+00 8.54E+00 BA-133

-3.38E+00 + 6.57E+00 9.13E+00 CO-60 1.14E+00 + 4.48E+00 5.82E+00 CO-60

-1.71E+00 + 5.48E+00 7.01E+00 ZN-65 7.21E+00 + 7.79E+00 9.80E+00 ZN-65

-3.41E+00 + 1.17E+01 1.53E+01 MN-54

-5.62E-01 + 4.87E+00 6.57E+00 MN-54 1.07E-01 + 3.99E+00 5.47E+00 CS-134

-9.62E-01 + 4.23E+00 5.82E+00 CS-134

-1.93E+00 + 4.52E+00 6.14E+00 CS-137 3.96E-01

+ 4.71E+00 6.57E+00 CS-137

-1.32E+00 + 4.99E+00 6.86E+00 BALA140 1.54E+00 + 4.58E+00 5.89E+00 BALA140 8.24E-01 + 4.94E+00 6.42E+00 K-40

+

1.28E+03 + 1.14E+02 7.19E+01 K-40

+

1.54E+03 + 1.27E+02 7.50E+01 FE-59 5.04E+00 + 1.32E+01 1.68E+01 FE-59 1.59E+00 + 1.42E+01 1.83E+01 ZRNB-95 2.31E+00 + 7.63E+00 1.02E+01 ZRNB-95

-2.68E+00 + 8.76E+00 1.17E+01 BE-7 4.80E+00 + 2.92E+01 4.05E+01 BE-7

-1.04E+01 + 3.96E+01 5.41E+01 Collection Date: 4/18/2023 Collection Date:

5/9/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-1.53E+00 + 6.34E+00 1.07E+01 BA-133 5.78E-01 + 6.45E+00 1.09E+01 CO-60 6.45E-01

+ 4.65E+00 6.08E+00 CO-60 4.56E-01 + 5.58E+00 7.23E+00 ZN-65 3.21E+00 + 9.80E+00 1.28E+01 ZN-65

-1.98E+00 + 1.15E+01 1.51E+01 MN-54 1.01E+00 + 4.57E+00 6.15E+00 MN-54

-1.91E+00 + 4.97E+00 6.60E+00 CS-134

-3.15E+00 + 5.22E+00 7.03E+00 CS-134 9.64E-01 + 3.97E+00 5.48E+00 CS-137

-2.37E+00 + 5.15E+00 7.01E+00 CS-137 1.06E+00 + 5.02E+00 6.92E+00 BALA140

-2.63E+00 + 6.81E+00 8.48E+00 BALA140 3.46E-01 + 7.38E+00 9.46E+00 K-40

+

1.39E+03 + 1.21E+02 7.28E+01 K-40

+

1.27E+03 + 1.12E+02 6.65E+01 FE-59 2.01E+00 + 1.21E+01 1.57E+01 FE-59

-4.57E-01 + 1.30E+01 1.69E+01 ZRNB-95 6.87E-01

+ 7.49E+00 1.02E+01 ZRNB-95

-4.11E+00 + 8.90E+00 1.18E+01 BE-7 2.14E+01 + 3.50E+01 4.72E+01 BE-7 9.78E+00 + 3.56E+01 4.89E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

4 of 6

Collection Date: 5/23/2023 Collection Date:

6/6/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-2.45E+00 + 5.71E+00 7.98E+00 BA-133

-3.40E+00 + 6.63E+00 9.21E+00 CO-60 1.33E+00 + 4.49E+00 5.82E+00 CO-60

-1.18E+00 + 5.79E+00 7.43E+00 ZN-65

-3.60E+00 + 1.15E+01 1.50E+01 ZN-65

-1.18E+00 + 1.11E+01 1.47E+01 MN-54

-2.67E-01 + 4.77E+00 6.47E+00 MN-54

-2.11E+00 + 5.17E+00 6.85E+00 CS-134 2.46E+00 + 3.72E+00 5.02E+00 CS-134

-2.58E+00 + 5.37E+00 8.96E+00 CS-137

-3.59E+00 + 6.37E+00 8.58E+00 CS-137 6.60E-01 + 4.32E+00 6.03E+00 BALA140 8.12E-01

+ 6.54E+00 8.33E+00 BALA140 2.44E+00 + 4.06E+00 5.10E+00 K-40

+

1.45E+03 + 1.24E+02 7.54E+01 K-40

+

1.28E+03 + 1.16E+02 7.39E+01 FE-59 9.70E-01

+ 1.37E+01 1.77E+01 FE-59 5.49E+00 + 1.23E+01 1.56E+01 ZRNB-95 1.66E+00 + 7.43E+00 1.00E+01 ZRNB-95

-3.61E+00 + 8.84E+00 1.17E+01 BE-7 6.90E+00 + 3.82E+01 5.25E+01 BE-7 6.84E+00 + 3.68E+01 5.06E+01 Collection Date: 6/20/2023 Collection Date: 7/11/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.03E+00 + 6.45E+00 8.98E+00 BA-133

-3.09E+00 + 5.96E+00 8.30E+00 CO-60 1.29E+00 + 4.90E+00 6.33E+00 CO-60

-7.21E-01 + 5.05E+00 6.56E+00 ZN-65

-1.31E+00 + 1.14E+01 1.50E+01 ZN-65 3.92E+00 + 9.58E+00 1.25E+01 MN-54

-8.29E-01 + 4.88E+00 6.57E+00 MN-54

-9.88E-01 + 4.57E+00 6.14E+00 CS-134

-8.55E-01 + 4.51E+00 6.21E+00 CS-134

-2.45E+00 + 5.11E+00 8.54E+00 CS-137

-2.64E+00 + 5.08E+00 6.89E+00 CS-137 3.96E+00 + 4.50E+00 5.99E+00 BALA140

-3.50E+00 + 6.75E+00 8.33E+00 BALA140 3.90E-01 + 5.35E+00 6.93E+00 K-40

+

1.44E+03 + 1.23E+02 7.41E+01 K-40

+

1.43E+03 + 1.22E+02 7.07E+01 FE-59 7.05E+00 + 1.08E+01 1.35E+01 FE-59

-1.21E+01 + 1.80E+01 2.23E+01 ZRNB-95

-7.82E-01 + 8.50E+00 1.15E+01 ZRNB-95

-4.02E+00 + 8.74E+00 1.16E+01 BE-7 1.47E+01 + 3.71E+01 5.06E+01 BE-7 1.54E+01 + 3.72E+01 5.06E+01 Collection Date: 7/25/2023 Collection Date:

8/8/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.90E+00 + 8.87E+00 1.13E+01 BA-133

-3.84E+00 + 9.28E+00 1.19E+01 CO-60 2.58E+00 + 6.97E+00 8.22E+00 CO-60

-4.57E+00 + 8.35E+00 8.73E+00 ZN-65 4.27E+00 + 1.15E+01 1.39E+01 ZN-65

-7.48E-01 + 1.47E+01 1.91E+01 MN-54

-2.61E+00 + 6.14E+00 7.51E+00 MN-54

-3.50E+00 + 7.34E+00 8.65E+00 CS-134

-2.00E+00 + 6.57E+00 8.65E+00 CS-134

-2.00E+00 + 5.77E+00 7.52E+00 CS-137

-3.56E+00 + 7.06E+00 8.43E+00 CS-137 6.68E-01 + 6.15E+00 8.64E+00 BALA140 1.17E+00 + 5.76E+00 7.37E+00 BALA140

-5.48E+00 + 1.03E+01 1.07E+01 K-40

+

1.31E+03 + 1.27E+03 7.01E+01 K-40

+

1.37E+03 + 1.33E+03 7.55E+01 FE-59

-3.25E+00 + 1.77E+01 2.26E+01 FE-59 8.34E+00 + 1.66E+01 1.84E+01 ZRNB-95

-1.53E+00 + 9.83E+00 1.33E+01 ZRNB-95 1.30E+00 + 9.13E+00 1.25E+01 BE-7 1.03E+01 + 4.13E+01 5.60E+01 BE-7

-4.43E+00 + 4.37E+01 6.12E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

5 of 6

Collection Date: 8/22/2023 Collection Date:

9/5/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133

-3.16E+00 + 6.21E+00 8.64E+00 BA-133

-2.39E+00 + 5.38E+00 6.76E+00 CO-60

-1.97E+00 + 6.16E+00 7.82E+00 CO-60

-7.43E-01 + 4.06E+00 5.00E+00 ZN-65 4.25E+00 + 8.47E+00 1.10E+01 ZN-65 3.47E+00 + 8.03E+00 9.19E+00 MN-54

-2.96E+00 + 5.35E+00 7.04E+00 MN-54

-1.44E+00 + 4.02E+00 5.00E+00 CS-134 5.34E-01

+ 3.83E+00 5.32E+00 CS-134 1.82E-01 + 3.22E+00 5.50E+00 CS-137 1.58E+00 + 5.04E+00 6.92E+00 CS-137

-2.57E+00 + 5.02E+00 5.89E+00 BALA140 5.11E+00 + 4.75E+00 5.60E+00 BALA140 0.00E+00 + 7.30E-01 4.78E+00 K-40

+

1.38E+03 + 1.18E+02 7.04E+01 K-40

+

3.37E+02 + 3.46E+02 1.92E+02 FE-59

-5.75E+00 + 1.52E+01 1.92E+01 FE-59

-2.07E+00 + 1.11E+01 1.38E+01 ZRNB-95 1.19E+00 + 7.34E+00 9.94E+00 ZRNB-95 3.82E-01 + 5.00E+00 6.79E+00 BE-7

-2.51E+01 + 4.97E+01 6.69E+01 BE-7 0.00E+00 + 1.38E+01 3.54E+01 Collection Date: 9/19/2023 Collection Date: 10/17/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 2.71E+00 + 5.04E+00 7.03E+00 BA-133

-3.49E+00 + 6.91E+00 9.59E+00 CO-60

-1.59E+00 + 6.13E+00 7.82E+00 CO-60

-7.59E-02 + 5.19E+00 6.79E+00 ZN-65

-6.74E+00 + 1.25E+01 1.60E+01 ZN-65 1.44E+00 + 9.93E+00 1.31E+01 MN-54

-1.04E+00 + 4.73E+00 6.35E+00 MN-54

-3.20E-01 + 4.53E+00 6.14E+00 CS-134

-2.82E+00 + 4.69E+00 6.33E+00 CS-134

-2.82E+00 + 4.69E+00 6.33E+00 CS-137

-3.96E-01 + 5.55E+00 7.68E+00 CS-137

-3.03E+00 + 5.24E+00 7.09E+00 BALA140

-1.52E+00 + 5.78E+00 7.33E+00 BALA140 2.28E+00 + 5.17E+00 6.50E+00 K-40

+

1.37E+03 + 1.19E+02 7.27E+01 K-40

+

1.26E+03 + 1.12E+02 6.79E+01 FE-59

-2.88E+00 + 1.48E+01 1.89E+01 FE-59

-4.79E+00 + 1.45E+01 1.84E+01 ZRNB-95 1.96E+00 + 7.83E+00 1.05E+01 ZRNB-95

-3.56E+00 + 8.71E+00 1.15E+01 BE-7

-1.71E+00 + 3.91E+01 5.40E+01 BE-7

-5.98E+00 + 3.56E+01 4.90E+01 Collection Date: 11/14/2023 Collection Date: 12/5/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 2.67E+00 + 8.13E+00 1.37E+01 BA-133

-3.39E+00 + 7.75E+00 1.12E+01 CO-60 1.87E+00 + 5.70E+00 7.67E+00 CO-60 2.63E+00 + 4.61E+00 6.24E+00 ZN-65 6.26E+00 + 1.39E+01 2.36E+01 ZN-65

-1.03E+01 + 1.67E+01 2.13E+01 MN-54 5.15E-01

+ 5.07E+00 7.03E+00 MN-54 2.56E+00 + 5.23E+00 6.98E+00 CS-134

-2.17E+00 + 7.18E+00 1.21E+01 CS-134

-3.45E+00 + 6.19E+00 8.37E+00 CS-137 2.13E+00 + 6.21E+00 8.60E+00 CS-137

-1.87E-01 + 5.33E+00 7.55E+00 BALA140

-1.91E+00 + 6.47E+00 8.60E+00 BALA140

-8.75E-01 + 6.11E+00 8.20E+00 K-40

+

1.22E+03 + 1.39E+02 9.36E+01 K-40

+

1.33E+03 + 1.37E+02 8.53E+01 FE-59 3.32E+00 + 1.38E+01 1.87E+01 FE-59

-3.77E+00 + 1.54E+01 2.05E+01 ZRNB-95

-2.20E+00 + 9.68E+00 1.36E+01 ZRNB-95

-2.58E+00 + 8.32E+00 1.16E+01 BE-7 1.17E+01 + 3.81E+01 5.47E+01 BE-7 1.22E+01 + 3.64E+01 5.19E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

6 of 6

TABLE A-12.2 GAMMA SPECTROMETRY RESULTS OF MILK -

SUMMARY

Results in pCi per liter Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs BA-133 Ind

-3.24E+00

-4.30E+00

-2.14E+00 9.82E+00 18 0

BA-133 Cntl

-2.28E+00

-3.90E+00 2.71E+00 9.12E+00 18 0

BALA140 Ind

-1.90E+00

-5.74E+00 2.23E+00 7.89E+00 18 0

BALA140 Cntl

-6.98E-02

-5.48E+00 5.11E+00 6.87E+00 18 0

BE-7 Ind

-4.53E+00

-3.16E+01 2.67E+01 5.36E+01 18 0

BE-7 Cntl 5.51E+00

-2.51E+01 2.51E+01 4.87E+01 18 0

CO-60 Ind 6.10E-01

-2.17E+00 3.23E+00 6.75E+00 18 0

CO-60 Cntl 7.92E-02

-4.57E+00 2.63E+00 6.41E+00 18 0

CS-134 Ind

-6.25E-01

-3.81E+00 2.44E+00 6.76E+00 18 0

CS-134 Cntl

-1.33E+00

-3.45E+00 2.46E+00 6.56E+00 18 0

CS-137 Ind

-3.77E-01

-3.51E+00 2.90E+00 7.03E+00 18 0

CS-137 Cntl

-3.95E-01

-3.59E+00 3.96E+00 6.75E+00 18 0

FE-59 Ind 1.68E+00

-1.16E+01 8.25E+00 1.64E+01 18 0

FE-59 Cntl 3.52E-01

-1.21E+01 1.25E+01 1.69E+01 18 0

K-40 Ind 1.33E+03 1.18E+03 1.61E+03 7.30E+01 18 18 K-40 Cntl 1.30E+03 3.37E+02 1.54E+03 7.71E+01 18 18 MN-54 Ind

-3.54E-01

-3.41E+00 3.67E+00 6.47E+00 18 0

MN-54 Cntl

-9.01E-01

-3.50E+00 2.56E+00 6.26E+00 18 0

ZN-65 Ind

-1.20E+00

-1.13E+01 1.06E+01 1.56E+01 18 0

ZN-65 Cntl 2.79E-02

-1.03E+01 7.21E+00 1.41E+01 18 0

ZRNB-95 Ind 6.70E-01

-3.22E+00 4.24E+00 1.05E+01 18 0

ZRNB-95 Cntl

-7.28E-01

-4.11E+00 2.31E+00 1.05E+01 18 0

Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

Table A-13.1 GAMMA SPECTROMETRY RESULTS OF PLANT DISCHARGE WATER STATION 27 - Plant Discharge Water Indicator Results in pCi/liter, corrected for decay during collection period Location ST-27 collected 2/2/2023 Location ST-27 collected 3/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.53E+01 + 6.02E+01 8.93E+01 K-40 4.58E+00 + 5.61E+01 8.18E+01 CR-51

-1.74E+01 + 3.99E+01 5.57E+01 CR-51

-4.98E+00 + 4.11E+01 5.79E+01 MN-54 4.01E+00 + 3.53E+00 4.25E+00 MN-54

-1.80E+00 + 4.22E+00 5.63E+00 CO-58

-4.69E-01 + 3.73E+00 5.11E+00 CO-58

-6.32E-01 + 3.83E+00 5.23E+00 FE-59 2.79E-01

+ 1.27E+01 1.66E+01 FE-59 3.14E+00 + 9.24E+00 1.21E+01 CO-60 2.51E+00 + 4.16E+00 5.27E+00 CO-60

-1.44E+00 + 4.72E+00 6.08E+00 ZN-65

-4.50E+00 + 1.02E+01 1.33E+01 ZN-65 1.72E+00 + 9.52E+00 1.26E+01 ZRNB-95

-2.39E+00 + 7.90E+00 1.06E+01 ZRNB-95 7.66E+00 + 6.28E+00 7.79E+00 I-131

-3.77E+00 + 6.72E+00 9.35E+00 I-131 1.53E+00 + 6.51E+00 9.17E+00 CS-134

-2.71E+00 + 4.52E+00 6.10E+00 CS-134

-2.14E-01 + 3.99E+00 5.56E+00 CS-137

-2.85E+00 + 4.94E+00 6.69E+00 CS-137 1.58E+00 + 4.05E+00 5.58E+00 BALA140

-5.91E+00 + 8.88E+00 1.08E+01 BALA140

-3.00E-01 + 7.32E+00 9.42E+00 BI-214 1.03E+01 + 1.01E+01 1.42E+01 BI-214

-9.20E-01 + 9.12E+00 1.36E+01 Location ST-27 collected 4/3/2023 Location ST-27 collected 5/1/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.15E+00 + 5.77E+01 8.37E+01 K-40 1.33E+01 + 5.27E+01 7.78E+01 CR-51 1.38E+01 + 3.89E+01 5.46E+01 CR-51

-1.89E+01 + 4.52E+01 6.32E+01 MN-54 2.44E+00 + 3.81E+00 5.03E+00 MN-54

-6.57E-01 + 4.40E+00 5.96E+00 CO-58

-1.70E-01 + 3.70E+00 5.11E+00 CO-58

-1.51E+00 + 4.50E+00 6.05E+00 FE-59 3.30E+00 + 1.25E+01 1.62E+01 FE-59 1.66E+00 + 9.46E+00 1.26E+01 CO-60 1.14E-01

+ 4.17E+00 5.56E+00 CO-60

-3.43E+00 + 5.62E+00 7.04E+00 ZN-65

-4.20E+00 + 1.03E+01 1.34E+01 ZN-65

-2.43E+00 + 1.01E+01 1.32E+01 ZRNB-95 2.81E+00 + 7.85E+00 1.05E+01 ZRNB-95

-7.74E-01 + 8.43E+00 1.14E+01 I-131

-3.34E+00 + 8.07E+00 1.13E+01 I-131 2.32E+00 + 1.13E+01 1.61E+01 CS-134

-2.26E+00 + 4.56E+00 6.18E+00 CS-134

-2.81E+00 + 4.83E+00 6.52E+00 CS-137

-2.11E+00 + 4.79E+00 6.54E+00 CS-137

-3.96E-01 + 4.43E+00 6.19E+00 BALA140 2.85E+00 + 5.84E+00 7.43E+00 BALA140

-5.95E+00 + 1.21E+01 1.49E+01 BI-214 5.67E+00 + 9.58E+00 1.37E+01 BI-214 9.09E+00 + 1.09E+01 1.53E+01 Location ST-27 collected 6/1/2023 Location ST-27 collected 6/29/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.13E+01 + 5.53E+01 7.98E+01 K-40 1.59E+01 + 3.55E+01 5.07E+01 CR-51 3.96E+00 + 3.56E+01 5.05E+01 CR-51 1.23E+01 + 2.64E+01 3.69E+01 MN-54 1.35E+00 + 4.00E+00 5.38E+00 MN-54

-5.61E-02 + 3.22E+00 4.38E+00 CO-58

-2.75E-02 + 4.10E+00 5.62E+00 CO-58

-1.67E+00 + 3.61E+00 4.77E+00 FE-59 5.92E+00 + 1.21E+01 1.54E+01 FE-59

-4.19E+00 + 1.08E+01 1.36E+01 CO-60 1.14E+00 + 4.48E+00 5.83E+00 CO-60 6.42E-01

+ 3.18E+00 4.03E+00 ZN-65

-3.11E+00 + 9.35E+00 1.23E+01 ZN-65

-3.35E+00 + 8.12E+00 1.02E+01 ZRNB-95

-7.61E-01 + 7.14E+00 9.73E+00 ZRNB-95 2.71E-01

+ 5.18E+00 7.08E+00 I-131

-9.81E-01 + 6.04E+00 8.56E+00 I-131 4.60E+00 + 4.31E+00 5.85E+00 CS-134

-2.39E+00 + 5.12E+00 8.56E+00 CS-134

-2.53E+00 + 4.16E+00 5.59E+00 CS-137

-3.20E+00 + 5.53E+00 7.48E+00 CS-137

-3.71E-01 + 3.16E+00 4.40E+00 BALA140 3.30E+00 + 5.54E+00 6.91E+00 BALA140 2.25E+00 + 4.68E+00 5.74E+00 BI-214

+

2.33E+01 + 7.89E+00 8.45E+00 BI-214

-4.28E-01 + 8.61E+00 1.23E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 2

Table A-13.1 GAMMA SPECTROMETRY RESULTS OF PLANT DISCHARGE WATER STATION 27 - Plant Discharge Water Indicator Results in pCi/liter, corrected for decay during collection period Location ST-27 collected 7/31/2023 Location ST-27 collected 8/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.00E+01 + 6.73E+01 9.61E+01 K-40 1.56E+01 + 5.49E+01 7.98E+01 CR-51

-1.27E+01 + 3.85E+01 5.39E+01 CR-51

-2.13E+01 + 4.82E+01 6.72E+01 MN-54 5.90E-01

+ 4.22E+00 5.72E+00 MN-54 2.46E-01

+ 4.08E+00 5.58E+00 CO-58 7.29E-01

+ 4.25E+00 5.76E+00 CO-58

-1.23E+00 + 4.53E+00 6.10E+00 FE-59 2.34E+00 + 1.20E+01 1.55E+01 FE-59

-5.89E+00 + 1.52E+01 1.93E+01 CO-60 1.25E+00 + 4.27E+00 5.55E+00 CO-60 3.05E-01

+ 4.20E+00 5.57E+00 ZN-65

-2.50E+00 + 1.01E+01 1.32E+01 ZN-65

-1.48E+00 + 9.39E+00 1.25E+01 ZRNB-95 1.96E+00 + 7.40E+00 9.96E+00 ZRNB-95 3.00E+00 + 6.83E+00 9.16E+00 I-131

-2.56E+00 + 5.77E+00 8.06E+00 I-131 5.29E+00 + 9.98E+00 1.39E+01 CS-134

-1.39E+00 + 3.99E+00 5.47E+00 CS-134

-1.29E+00 + 3.96E+00 5.44E+00 CS-137

-2.11E+00 + 4.85E+00 6.63E+00 CS-137 2.38E+00 + 4.21E+00 5.72E+00 BALA140 5.44E-02

+ 5.13E+00 6.79E+00 BALA140 1.50E+00 + 9.24E+00 1.19E+01 BI-214 1.09E+01 + 9.56E+00 1.34E+01 BI-214 2.49E+00 + 9.62E+00 1.40E+01 Location ST-27 collected 9/28/2023 Location ST-27 collected 10/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.59E+01 + 4.81E+01 5.61E+01 K-40 3.20E+01 + 5.08E+01 5.48E+01 CR-51

-9.62E+00 + 3.97E+01 5.43E+01 CR-51

-6.12E-01 + 2.50E+01 3.56E+01 MN-54 8.83E-01

+ 3.22E+00 4.18E+00 MN-54 2.04E+00 + 3.44E+00 3.70E+00 CO-58

-5.86E-01 + 3.74E+00 5.00E+00 CO-58

-6.30E-01 + 3.33E+00 4.41E+00 FE-59 1.30E+00 + 9.48E+00 1.23E+01 FE-59

-4.19E-01 + 8.21E+00 1.07E+01 CO-60 2.35E+00 + 3.49E+00 3.22E+00 CO-60 1.56E+00 + 3.71E+00 4.21E+00 ZN-65 1.59E+00 + 7.30E+00 9.16E+00 ZN-65

-5.19E+00 + 1.06E+01 1.55E+01 ZRNB-95

-4.66E+00 + 8.82E+00 9.95E+00 ZRNB-95

-3.86E-01 + 5.46E+00 7.40E+00 I-131

-8.27E+00 + 1.71E+01 2.11E+01 I-131

-3.98E-01 + 3.66E+00 5.17E+00 CS-134

-8.45E-01 + 3.63E+00 4.85E+00 CS-134

-7.19E-01 + 4.87E+00 8.12E+00 CS-137

-1.11E+00 + 3.76E+00 4.95E+00 CS-137

-3.71E-01 + 3.57E+00 4.93E+00 BALA140

-2.48E+00 + 1.16E+01 1.39E+01 BALA140 2.24E+00 + 4.23E+00 4.40E+00 BI-214 4.70E+00 + 9.72E+00 1.21E+01 BI-214

+

3.06E+01 + 3.08E+01 1.08E+01 Location ST-27 collected 11/30/2023 Location ST-27 collected 12/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

9.35E+01 + 4.29E+01 5.52E+01 K-40

-2.06E+01 + 6.17E+01 8.93E+01 CR-51

-3.84E+00 + 2.78E+01 4.06E+01 CR-51 3.10E+00 + 3.96E+01 5.61E+01 MN-54 1.56E-01

+ 2.98E+00 4.07E+00 MN-54 1.30E+00 + 4.21E+00 5.66E+00 CO-58 6.99E-01

+ 2.97E+00 4.13E+00 CO-58 8.71E-01

+ 4.04E+00 5.48E+00 FE-59

-5.45E+00 + 9.56E+00 1.23E+01 FE-59

-5.74E-01 + 1.21E+01 1.59E+01 CO-60 2.49E-01

+ 3.53E+00 4.85E+00 CO-60

-2.28E+00 + 5.53E+00 7.02E+00 ZN-65

-4.58E+00 + 8.59E+00 1.44E+01 ZN-65

-4.19E+00 + 1.03E+01 1.34E+01 ZRNB-95 6.93E-01

+ 6.02E+00 8.38E+00 ZRNB-95 3.41E-01

+ 6.75E+00 9.28E+00 I-131 2.24E+00 + 4.36E+00 6.30E+00 I-131

-2.76E+00 + 7.72E+00 1.08E+01 CS-134

-1.66E+00 + 4.64E+00 7.77E+00 CS-134

-7.52E-01 + 4.29E+00 5.91E+00 CS-137

-3.84E-01 + 3.47E+00 4.82E+00 CS-137 1.19E+00 + 3.97E+00 5.50E+00 BALA140

-2.52E+00 + 5.47E+00 6.97E+00 BALA140

-1.02E+00 + 8.33E+00 1.06E+01 BI-214

+

1.91E+01 + 8.79E+00 1.08E+01 BI-214 7.72E+00 + 9.09E+00 1.30E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 2

TABLE A-13.2 GAMMA SPECTROMETRY RESULTS OF PLANT DISCHARGE WATER -

SUMMARY

Results in pCi/liter, corrected for decay during collection period Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 9.79E+00

-4.53E+01 9.35E+01 7.45E+01 12 1

CR-51

-4.68E+00

-2.13E+01 1.38E+01 5.22E+01 12 0

MN-54 8.74E-01

-1.80E+00 4.01E+00 4.96E+00 12 0

CO-58

-3.85E-01

-1.67E+00 8.71E-01 5.23E+00 12 0

FE-59 1.18E-01

-5.89E+00 5.92E+00 1.44E+01 12 0

CO-60 2.47E-01

-3.43E+00 2.51E+00 5.35E+00 12 0

ZN-65

-2.69E+00

-5.19E+00 1.72E+00 1.28E+01 12 0

ZRNB-95 1.17E+00

-2.39E+00 7.66E+00 9.21E+00 12 0

I-131

-5.07E-01

-8.27E+00 5.29E+00 1.05E+01 12 0

CS-134

-1.63E+00

-2.81E+00

-2.14E-01 6.34E+00 12 0

CS-137

-6.47E-01

-3.20E+00 2.38E+00 5.79E+00 12 0

BALA140

-4.99E-01

-5.95E+00 3.30E+00 9.15E+00 12 0

BI-214 1.02E+01

-9.20E-01 3.06E+01 1.26E+01 12 3

Page 1 of 1

Table A-14.1 GAMMA SPECTROMETRY RESULTS OF DEEP GROUND WATER Deep Ground Water Wells - Stations 31, 32, and 52 Results in pCi/liter Location ST-31 collected 3/6/2023 Location ST-31 collected 6/8/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.64E+01 + 6.73E+01 9.28E+01 K-40 1.91E+00 + 6.14E+01 8.75E+01 CR-51

-2.46E+01 + 4.49E+01 6.22E+01 CR-51 2.57E+00 + 4.03E+01 5.70E+01 MN-54

-1.47E+00 + 5.23E+00 6.97E+00 MN-54 1.07E-01

+ 4.46E+00 6.07E+00 CO-58

-1.48E+00 + 4.88E+00 6.51E+00 CO-58 8.70E-01

+ 4.29E+00 5.81E+00 FE-59 3.49E+00 + 1.37E+01 1.75E+01 FE-59

-5.46E-01 + 1.15E+01 1.52E+01 CO-60

-9.87E-01 + 4.88E+00 6.33E+00 CO-60 1.22E+00 + 4.70E+00 6.08E+00 ZN-65

-6.25E+00 + 1.41E+01 2.37E+01 ZN-65

-4.12E+00 + 1.34E+01 2.26E+01 ZRNB-95 9.77E-01

+ 7.47E+00 1.01E+01 ZRNB-95 1.46E+00 + 8.32E+00 1.12E+01 I-131 4.38E+00 + 5.73E+00 7.91E+00 I-131

-3.63E+00 + 6.45E+00 8.97E+00 CS-134 1.92E+00 + 8.85E+00 1.48E+01 CS-134 1.26E+00 + 7.93E+00 1.33E+01 CS-137

-3.43E+00 + 5.88E+00 7.94E+00 CS-137

-3.44E+00 + 5.81E+00 7.84E+00 BALA140 5.35E-02

+ 6.84E+00 8.79E+00 BALA140 3.12E+00 + 6.45E+00 8.04E+00 BI-214

+

1.41E+02 + 1.51E+01 1.29E+01 BI-214

+

1.06E+02 + 1.26E+01 1.17E+01 Location ST-31 collected 8/16/2023 Location ST-31 collected 11/6/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.57E+01 + 7.45E+01 1.04E+02 K-40

-6.85E+00 + 5.53E+01 8.18E+01 CR-51

-4.04E+00 + 4.31E+01 6.05E+01 CR-51

-1.84E+01 + 4.27E+01 5.94E+01 MN-54

-3.46E+00 + 5.64E+00 7.38E+00 MN-54

-3.99E+00 + 6.31E+00 8.24E+00 CO-58

-1.13E+00 + 4.96E+00 6.64E+00 CO-58

-2.24E+00 + 4.79E+00 6.34E+00 FE-59

-1.05E+01 + 1.60E+01 1.98E+01 FE-59

-3.43E+00 + 1.18E+01 1.52E+01 CO-60

-1.44E+00 + 5.63E+00 7.22E+00 CO-60

-3.79E-01 + 5.39E+00 7.01E+00 ZN-65

-1.57E+00 + 1.69E+01 2.86E+01 ZN-65

-3.28E+00 + 1.53E+01 2.59E+01 ZRNB-95 4.39E+00 + 8.68E+00 1.14E+01 ZRNB-95

-3.22E-01 + 8.47E+00 1.15E+01 I-131

-1.38E+00 + 5.37E+00 7.52E+00 I-131 1.11E+00 + 5.34E+00 7.53E+00 CS-134

-4.91E-01 + 1.06E+01 1.77E+01 CS-134 8.34E-01

+ 9.49E+00 1.59E+01 CS-137

-3.03E+00 + 6.01E+00 8.13E+00 CS-137 2.64E-01

+ 5.89E+00 8.13E+00 BALA140 6.51E-01

+ 6.74E+00 8.53E+00 BALA140 7.08E-01

+ 7.33E+00 9.28E+00 BI-214

+

2.16E+02 + 1.88E+01 1.44E+01 BI-214

+

1.68E+02 + 1.66E+01 1.36E+01 Location ST-32 collected 3/6/2023 Location ST-32 collected 6/8/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-2.66E+00 + 7.38E+01 1.01E+02 K-40 3.48E+01 + 5.21E+01 6.77E+01 CR-51

-2.79E-01 + 5.23E+01 7.35E+01 CR-51

-6.10E+00 + 4.25E+01 5.94E+01 MN-54 7.77E-01

+ 5.61E+00 7.52E+00 MN-54 1.69E+00 + 4.30E+00 5.68E+00 CO-58

-1.54E+00 + 6.08E+00 8.07E+00 CO-58

-3.22E+00 + 5.07E+00 6.60E+00 FE-59 1.32E+01 + 1.40E+01 1.71E+01 FE-59 3.33E+00 + 1.07E+01 1.36E+01 CO-60

-2.66E-01 + 6.06E+00 7.83E+00 CO-60 1.44E+00 + 4.60E+00 5.68E+00 ZN-65 4.57E+00 + 2.27E+01 3.81E+01 ZN-65

-2.38E+00 + 2.00E+01 3.35E+01 ZRNB-95

-1.58E+00 + 1.07E+01 1.42E+01 ZRNB-95

-2.69E+00 + 8.50E+00 1.12E+01 I-131

-3.14E-01 + 7.60E+00 1.07E+01 I-131

-3.78E+00 + 6.71E+00 9.28E+00 CS-134 1.67E+00 + 1.54E+01 2.56E+01 CS-134

-7.73E-01 + 1.31E+01 2.18E+01 CS-137

-4.56E+00 + 7.33E+00 9.84E+00 CS-137

-3.54E+00 + 5.65E+00 7.57E+00 BALA140

-4.87E-01 + 9.56E+00 1.20E+01 BALA140 0.00E+00 + 4.89E+00 9.08E+00 BI-214

+

4.99E+02 + 2.93E+01 1.78E+01 BI-214

+

5.15E+02 + 2.70E+01 1.41E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 2

Table A-14.1 GAMMA SPECTROMETRY RESULTS OF DEEP GROUND WATER Deep Ground Water Wells - Stations 31, 32, and 52 Results in pCi/liter Location ST-32 collected 8/16/2023 Location ST-32 collected 11/6/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.23E+01 + 7.60E+01 8.11E+01 K-40

-6.25E+01 + 3.31E+01 5.70E+01 CR-51

-1.75E+00 + 4.91E+01 6.84E+01 CR-51

-2.52E+00 + 1.59E+01 2.37E+01 MN-54

-4.14E+00 + 7.54E+00 8.31E+00 MN-54

-4.83E-01 + 2.03E+00 2.81E+00 CO-58

-4.51E+00 + 8.27E+00 9.13E+00 CO-58

-1.06E+00 + 2.05E+00 2.84E+00 FE-59

-2.91E-01 + 1.43E+01 1.80E+01 FE-59

-5.04E-01 + 4.42E+00 6.27E+00 CO-60

-1.43E+00 + 7.09E+00 8.49E+00 CO-60 7.64E-01

+ 1.49E+00 2.30E+00 ZN-65 8.75E+00 + 2.69E+01 4.25E+01 ZN-65 6.12E-01

+ 7.78E+00 1.34E+01 ZRNB-95 8.76E+00 + 1.21E+01 1.12E+01 ZRNB-95

-5.01E-01 + 3.11E+00 4.49E+00 I-131 2.52E+00 + 6.10E+00 7.76E+00 I-131

-3.00E-02 + 1.95E+00 2.96E+00 CS-134 3.20E+00 + 1.85E+01 3.02E+01 CS-134

-1.06E+00 + 6.02E+00 1.01E+01 CS-137

-4.41E+00 + 8.27E+00 9.49E+00 CS-137

-2.88E-01 + 2.46E+00 3.49E+00 BALA140 4.69E-01

+ 7.52E+00 9.04E+00 BALA140

-1.84E+00 + 3.67E+00 4.71E+00 BI-214

+

9.45E+02 + 9.10E+02 1.75E+01 BI-214

+

1.01E+02 + 1.01E+01 7.73E+00 Location ST-52 collected 3/6/2023 Location ST-52 collected 6/8/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-1.56E+01 + 5.85E+01 8.56E+01 K-40 1.59E+01 + 3.55E+01 5.07E+01 CR-51

-5.83E+00 + 4.22E+01 5.95E+01 CR-51

-7.75E+00 + 2.71E+01 3.81E+01 MN-54

-2.16E-01 + 4.23E+00 5.77E+00 MN-54 1.86E-01

+ 3.04E+00 4.13E+00 CO-58 3.67E+00 + 3.69E+00 4.74E+00 CO-58

-8.76E-01 + 3.49E+00 4.68E+00 FE-59

-1.81E+00 + 1.27E+01 1.65E+01 FE-59

-2.87E+00 + 8.12E+00 1.04E+01 CO-60 2.05E+00 + 4.97E+00 6.34E+00 CO-60

-8.21E-01 + 3.62E+00 4.55E+00 ZN-65

-7.41E+00 + 1.39E+01 1.77E+01 ZN-65

-3.33E+00 + 8.07E+00 1.02E+01 ZRNB-95 1.55E+00 + 7.67E+00 1.04E+01 ZRNB-95 3.87E+00 + 5.40E+00 7.07E+00 I-131 4.04E-01

+ 7.05E+00 1.00E+01 I-131

-5.24E-01 + 4.24E+00 6.03E+00 CS-134 8.38E-01

+ 5.31E+00 8.98E+00 CS-134

-2.63E+00 + 4.31E+00 5.78E+00 CS-137

-6.60E-01 + 4.45E+00 6.19E+00 CS-137 1.21E+00 + 3.64E+00 4.99E+00 BALA140

-2.85E+00 + 9.06E+00 1.13E+01 BALA140

-2.40E+00 + 5.78E+00 7.00E+00 BI-214

+

1.90E+01 + 9.19E+00 1.23E+01 BI-214 4.41E+00 + 8.25E+00 1.16E+01 Location ST-52 collected 8/16/2023 Location ST-52 collected 12/4/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-7.99E+00 + 5.90E+01 8.56E+01 K-40 1.17E+00 + 5.00E+01 7.25E+01 CR-51

-4.50E+00 + 3.51E+01 4.97E+01 CR-51

-2.41E+00 + 3.25E+01 4.58E+01 MN-54 5.33E-02

+ 4.16E+00 5.69E+00 MN-54 1.17E+00 + 4.03E+00 5.38E+00 CO-58 2.38E-01

+ 3.95E+00 5.40E+00 CO-58 6.54E-01

+ 3.73E+00 5.02E+00 FE-59 8.51E+00 + 7.42E+00 8.86E+00 FE-59 4.85E+00 + 9.26E+00 1.17E+01 CO-60 2.09E+00 + 4.56E+00 5.82E+00 CO-60 4.16E-01

+ 3.79E+00 4.95E+00 ZN-65

-5.62E+00 + 1.11E+01 1.44E+01 ZN-65

-2.16E+00 + 7.25E+00 9.53E+00 ZRNB-95 6.38E-01

+ 6.83E+00 9.32E+00 ZRNB-95 6.53E+00 + 5.22E+00 6.57E+00 I-131

-4.30E-01 + 4.38E+00 6.21E+00 I-131 4.77E-01

+ 4.84E+00 6.84E+00 CS-134

-2.04E+00 + 5.00E+00 8.38E+00 CS-134

-1.93E+00 + 3.70E+00 5.00E+00 CS-137

-1.32E-01 + 4.24E+00 5.96E+00 CS-137

-1.03E+00 + 4.05E+00 5.57E+00 BALA140 4.33E-01

+ 5.60E+00 7.22E+00 BALA140

-7.64E-01 + 5.71E+00 7.25E+00 BI-214

+

2.26E+01 + 8.06E+00 9.12E+00 BI-214 5.18E-01

+ 8.26E+00 1.21E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 2

TABLE A-14.2 GAMMA SPECTROMETRY RESULTS OF DEEP GROUND WATER -

SUMMARY

Results in pCi/liter Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40

-2.41E+00

-6.25E+01 4.23E+01 8.06E+01 12 0

CR-51

-6.30E+00

-2.46E+01 2.57E+00 5.48E+01 12 0

MN-54

-8.15E-01

-4.14E+00 1.69E+00 6.16E+00 12 0

CO-58

-8.86E-01

-4.51E+00 3.67E+00 5.98E+00 12 0

FE-59 1.12E+00

-1.05E+01 1.32E+01 1.42E+01 12 0

CO-60 2.20E-01

-1.44E+00 2.09E+00 6.05E+00 12 0

ZN-65

-1.85E+00

-7.41E+00 8.75E+00 2.33E+01 12 0

ZRNB-95 1.18E+00

-7.41E+00 8.76E+00 1.05E+01 12 0

I-131

-1.00E-01

-3.78E+00 4.38E+00 7.65E+00 12 0

CS-134 6.70E-02

-2.63E+00 3.20E+00 1.48E+01 12 0

CS-137

-1.92E+00

-4.56E+00 1.21E+00 7.10E+00 12 0

BALA140

-2.43E-01

-2.85E+00 3.12E+00 8.52E+00 12 0

BI-214 2.28E+02 5.18E-01 9.45E+02 1.29E+01 12 10 Page 1 of 1

TABLE A-15.1 GAMMA SPECTROMETRY RESULTS OF ROOT CROPS Results in pCi/ kilogram (wet)

Station 37B, and 4B are Indicator - Station 9C is Control Station 37 beets collected 8/26/2022 Station 37 Potato collected 8/27/2022 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.96E+03

+

1.10E+02 7.23E+01 K-40

+

4.44E+03

+

2.14E+02 6.94E+01 MN-54 9.99E-01

+

4.61E+00 6.04E+00 MN-54 1.88E+00

+

5.28E+00 6.99E+00 CO-58 2.62E+00

+

5.56E+00 7.24E+00 CO-58 2.90E-01

+

6.33E+00 8.50E+00 FE-59

-1.36E+01

+

2.15E+01 2.63E+01 FE-59 8.19E+00

+

2.02E+01 2.54E+01 CO-60

-2.10E-01

+

4.97E+00 6.22E+00 CO-60

-8.73E-01

+

7.19E+00 8.87E+00 ZN-65

-8.00E+00

+

1.18E+01 1.49E+01 ZN-65 1.61E+00

+

1.56E+01 1.96E+01 ZRNB-95

-2.11E+00

+

1.09E+01 1.43E+01 ZRNB-95 3.39E+00

+

1.06E+01 1.41E+01 I-131

-2.19E+01

+

6.94E+01 9.61E+01 I-131

-2.04E+01

+

4.09E+01 5.69E+01 CS-134

-1.25E+00

+

4.20E+00 5.65E+00 CS-134

-3.24E+00

+

6.14E+00 1.02E+01 CS-137

-2.78E-01

+

4.45E+00 6.04E+00 CS-137

-3.53E+00

+

5.67E+00 7.62E+00 BALA140

-4.98E+00

+

3.23E+01 3.95E+01 BALA140

-1.76E+01

+

2.59E+01 3.06E+01 Station 37 Carrots collected 6/12/2023 Station 37 Potato collected 6/30/2023 Nuclide RQ Activity MDA Nuclide RQ Activity Error MDA K-40

+

2.25E+03

+

1.51E+02 7.44E+01 K-40

+

3.59E+03

+

3.03E+02 1.11E+02 MN-54

-5.86E-01

+

4.78E+00 6.44E+00 MN-54 2.97E-01

+

8.03E+00 1.13E+01 CO-58

-1.84E+00

+

5.15E+00 6.84E+00 CO-58

-5.32E+00

+

1.01E+01 1.35E+01 FE-59

-2.50E+00

+

1.53E+01 1.95E+01 FE-59 5.84E+00

+

2.41E+01 3.18E+01 CO-60

-9.41E-01

+

6.25E+00 7.99E+00 CO-60

-8.20E+00

+

1.31E+01 1.61E+01 ZN-65

-3.18E+00

+

1.25E+01 1.62E+01 ZN-65

-1.02E+01

+

2.52E+01 3.21E+01 ZRNB-95 4.49E+00

+

7.62E+00 1.00E+01 ZRNB-95

-9.10E-01

+

1.47E+01 2.05E+01 I-131

-5.68E-01

+

4.80E+00 6.79E+00 I-131 2.76E+00

+

8.99E+00 1.29E+01 CS-134 2.75E+00

+

3.78E+00 5.07E+00 CS-134

-3.94E+00

+

8.55E+00 1.18E+01 CS-137

-3.32E+00

+

5.60E+00 7.55E+00 CS-137 1.48E+00

+

8.59E+00 1.22E+01 BALA140 3.20E+00

+

4.74E+00 5.83E+00 BALA140

-2.19E+00

+

1.06E+01 1.38E+01 Station 4B Potato collected 8/2/2023 Station 4B Potato collected 8/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

3.15E+03

+

3.04E+03 9.39E+01 K-40

+

6.97E+02

+

7.41E+02 5.02E+02 MN-54

-3.36E+00

+

9.09E+00 1.15E+01 MN-54 2.82E+00

+

5.54E+00 6.52E+00 CO-58

-1.46E+00

+

7.76E+00 1.06E+01 CO-58 2.24E-01

+

6.07E+00 8.51E+00 FE-59 2.68E+00

+

2.04E+01 2.72E+01 FE-59 7.20E-01

+

1.75E+01 2.35E+01 CO-60 4.18E+00

+

8.14E+00 8.96E+00 CO-60

-1.10E+00

+

7.57E+00 9.77E+00 ZN-65

-3.72E+00

+

1.92E+01 2.47E+01 ZN-65

-3.94E+00

+

2.16E+01 2.74E+01 ZRNB-95

-4.82E-01

+

1.18E+01 1.67E+01 ZRNB-95

-2.52E+00

+

1.10E+01 1.47E+01 I-131

-8.45E-01

+

6.68E+00 9.69E+00 I-131

-3.90E+00

+

7.98E+00 9.89E+00 CS-134 8.61E-01

+

5.95E+00 8.46E+00 CS-134

-6.93E-01

+

5.73E+00 8.08E+00 CS-137 0.00E+00

+

3.28E+00 1.18E+01 CS-137

-1.13E+00

+

6.87E+00 9.62E+00 BALA140 0.00E+00

+

1.23E+00 1.16E+01 BALA140

-4.49E+00

+

9.64E+00 1.06E+01 Station 9C Potato collected 9/27/2023 Nuclide RQ Activity Error MDA K-40

+

3.41E+03

+

2.67E+02 1.11E+02 MN-54

-2.70E+00

+

8.91E+00 1.20E+01 CO-58 2.07E+00

+

8.55E+00 1.16E+01 FE-59

-3.86E+00

+

2.63E+01 3.43E+01 CO-60

-3.88E+00

+

1.10E+01 1.40E+01 ZN-65

-1.03E+00

+

2.34E+01 3.11E+01 ZRNB-95

-7.07E+00

+

1.63E+01 2.18E+01 I-131 5.22E+00

+

1.19E+01 1.69E+01 CS-134

-2.00E+00

+

8.46E+00 1.44E+01 CS-137

-5.85E-01

+

9.30E+00 1.31E+01 BALA140

-2.49E+00

+

1.23E+01 1.63E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE A-15.2 GAMMA SPECTROMETRY RESULTS OF ROOT CROPS -

SUMMARY

Results in pCi/ kilogram (wet)

Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 Ind 2.68E+03 6.97E+02 4.44E+03 1.54E+02 6

6 K-40 Cntl 3.41E+03 3.41E+03 3.41E+03 1.11E+02 1

1 MN-54 Ind 3.41E-01

-3.36E+00 2.82E+00 8.12E+00 6

0 MN-54 Cntl

-2.70E+00

-2.70E+00

-2.70E+00 1.20E+01 1

0 CO-58 Ind

-9.16E-01

-5.32E+00 2.62E+00 9.19E+00 6

0 CO-58 Cntl 2.07E+00 2.07E+00 2.07E+00 1.16E+01 1

0 FE-59 Ind 2.26E-01

-1.36E+01 8.19E+00 2.56E+01 6

0 FE-59 Cntl

-3.86E+00

-3.86E+00

-3.86E+00 3.43E+01 1

0 CO-60 Ind

-1.19E+00

-8.20E+00 4.18E+00 9.66E+00 6

0 CO-60 Cntl

-3.88E+00

-3.88E+00

-3.88E+00 1.40E+01 1

0 ZN-65 Ind

-4.57E+00

-1.02E+01 1.61E+00 2.25E+01 6

0 ZN-65 Cntl

-1.03E+00

-1.03E+00

-1.03E+00 3.11E+01 1

0 ZRNB-95 Ind 3.09E-01

-2.52E+00 4.49E+00 1.51E+01 6

0 ZRNB-95 Cntl

-7.07E+00

-7.07E+00

-7.07E+00 2.18E+01 1

0 I-131 Ind

-7.48E+00

-2.19E+01 2.76E+00 3.20E+01 6

0 I-131 Cntl 5.22E+00 5.22E+00 5.22E+00 1.69E+01 1

0 CS-134 Ind

-9.19E-01

-3.94E+00 2.75E+00 8.21E+00 6

0 CS-134 Cntl

-2.00E+00

-2.00E+00

-2.00E+00 1.44E+01 1

0 CS-137 Ind

-1.13E+00

-3.53E+00 1.48E+00 9.14E+00 6

0 CS-137 Cntl

-5.85E-01

-5.85E-01

-5.85E-01 1.31E+01 1

0 BALA140 Ind

-4.34E+00

-1.76E+01 3.20E+00 1.87E+01 6

0 BALA140 Cntl

-2.49E+00

-2.49E+00

-2.49E+00 1.63E+01 1

0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-16.1 GAMMA SPECTROMETRY RESULTS OF FRUITS Results in pCi/ kilogram (wet)

Station 37 is Indicator - Station 9C is Control Station 37 Apples collected 8/1/2022 Station 37 Blue Berrys collected 8/26/2022 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.19E+03

+

2.38E+02 1.95E+02 K-40

+

9.08E+02

+

9.88E+01 7.05E+01 MN-54 5.18E+00

+

9.31E+00 1.27E+01 MN-54

-2.70E+00

+

5.27E+00 6.95E+00 CO-58 2.63E+00

+

7.43E+00 1.10E+01 CO-58

-7.97E-01

+

5.34E+00 7.23E+00 FE-59 9.90E+00

+

1.75E+01 2.43E+01 FE-59 7.92E+00

+

1.47E+01 1.87E+01 CO-60 7.19E+00

+

1.22E+01 1.62E+01 CO-60 2.29E+00

+

5.10E+00 6.32E+00 ZN-65

-4.16E+00 +

3.35E+01 4.56E+01 ZN-65 5.12E+00

+

1.00E+01 1.26E+01 ZRNB-95 4.55E+00

+

2.24E+01 3.21E+01 ZRNB-95 6.19E+00

+

9.95E+00 1.31E+01 I-131

-4.18E-01

+

1.00E+01 1.56E+01 I-131

-2.22E+00

+

3.68E+01 5.24E+01 CS-134

-4.24E+00 +

1.40E+01 1.96E+01 CS-134

-5.53E-01

+

4.94E+00 6.80E+00 CS-137 4.71E+00

+

1.21E+01 1.71E+01 CS-137 5.32E-01

+

5.38E+00 7.45E+00 BALA140

-9.97E+00 +

2.15E+01 2.80E+01 BALA140

-2.57E+00

+

1.99E+01 2.49E+01 Station 37 Red Grapes collected 9/27/2022 Station 37 White Grapes collected 9/20/2022 Nuclide RQ Activity MDA Nuclide RQ Activity Error MDA K-40

+

1.70E+03

+

2.49E+02 1.51E+02 K-40

+

1.80E+03

+

2.54E+02 1.48E+02 MN-54

-4.91E+00 +

1.19E+01 1.62E+01 MN-54 2.59E+00

+

8.90E+00 1.25E+01 CO-58

-4.01E+00 +

1.01E+01 1.39E+01 CO-58

-1.59E+01

+

8.69E+00 9.60E+00 FE-59 9.73E+00

+

2.67E+01 3.54E+01 FE-59 1.11E+01

+

2.17E+01 2.90E+01 CO-60 2.73E+00

+

1.14E+01 1.55E+01 CO-60

-4.55E-01

+

1.36E+01 1.85E+01 ZN-65 4.71E+00

+

2.26E+01 3.11E+01 ZN-65 5.57E+00

+

2.48E+01 3.37E+01 ZRNB-95 9.11E+00

+

1.96E+01 2.65E+01 ZRNB-95

-5.63E+00

+

2.41E+01 3.29E+01 I-131 2.02E+00

+

7.57E+00 1.11E+01 I-131

-3.83E+00

+

1.66E+01 2.40E+01 CS-134 1.71E+00

+

8.00E+00 1.15E+01 CS-134

-5.14E+00

+

1.12E+01 1.54E+01 CS-137

-4.22E+00 +

1.17E+01 1.64E+01 CS-137

-7.37E+00

+

1.32E+01 1.81E+01 BALA140

-2.12E+00 +

1.51E+01 2.01E+01 BALA140

-2.97E+00

+

2.11E+01 2.81E+01 Station 37 Apples collected 6/12/2023 Station 37 Peaches collected 6/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

9.26E+02

+

1.07E+02 8.10E+01 K-40

+

2.50E+03

+

1.64E+02 7.95E+01 MN-54 2.34E-01

+

4.95E+00 6.72E+00 MN-54 9.38E-01

+

5.55E+00 7.43E+00 CO-58

-1.09E+00 +

4.55E+00 6.14E+00 CO-58

-1.13E+00

+

5.02E+00 6.72E+00 FE-59 3.86E+00

+

1.27E+01 1.63E+01 FE-59 3.68E+00

+

1.41E+01 1.80E+01 CO-60

-1.16E+00 +

6.15E+00 7.92E+00 CO-60 8.35E-01

+

5.60E+00 7.23E+00 ZN-65 5.58E+00

+

1.03E+01 1.33E+01 ZN-65

-9.76E+00

+

1.46E+01 1.85E+01 ZRNB-95 2.03E+00

+

8.79E+00 1.18E+01 ZRNB-95

-1.82E+00

+

8.92E+00 1.20E+01 I-131

-8.82E-01

+

4.89E+00 6.90E+00 I-131 6.71E-01

+

5.36E+00 7.60E+00 CS-134 2.81E+00

+

5.25E+00 8.76E+00 CS-134

-1.39E+00

+

4.82E+00 6.58E+00 CS-137

-3.08E+00 +

5.60E+00 7.59E+00 CS-137

-1.45E+00

+

5.06E+00 6.95E+00 BALA140 3.04E-01

+

6.49E+00 8.32E+00 BALA140

-6.47E-01

+

5.93E+00 7.66E+00 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 3

TABLE A-16.1 GAMMA SPECTROMETRY RESULTS OF FRUITS Results in pCi/ kilogram (wet)

Station 37 is Indicator - Station 9C is Control Station 37 Wartermelon collected 7/19/2023 Station 9C Apples collected 6/12/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.01E+03

+

9.88E+02 9.66E+01 K-40

+

7.48E+02

+

7.93E+01 5.58E+01 MN-54 1.55E+00

+

5.24E+00 7.15E+00 MN-54 5.28E-01

+

3.59E+00 4.84E+00 CO-58

-3.13E+00 +

9.29E+00 1.19E+01 CO-58

-8.42E-01

+

3.44E+00 4.61E+00 FE-59 5.82E+00

+

2.05E+01 2.61E+01 FE-59

-4.42E+00

+

1.15E+01 1.45E+01 CO-60 2.69E+00

+

5.27E+00 6.04E+00 CO-60

-2.71E+00

+

4.90E+00 5.97E+00 ZN-65 8.88E-01

+

1.46E+01 2.00E+01 ZN-65

-6.56E+00

+

1.06E+01 1.31E+01 ZRNB-95

-2.39E+00 +

1.27E+01 1.75E+01 ZRNB-95 2.08E+00

+

4.94E+00 6.61E+00 I-131

-1.04E-01

+

6.32E+00 9.35E+00 I-131

-1.93E+00

+

3.45E+00 4.80E+00 CS-134

-3.93E+00 +

8.76E+00 1.09E+01 CS-134

-1.17E+00

+

3.72E+00 5.07E+00 CS-137 0.00E+00

+

1.95E+00 1.08E+01 CS-137

-2.41E+00

+

4.37E+00 5.91E+00 BALA140 0.00E+00

+

1.25E+00 7.51E+00 BALA140 1.20E+00

+

3.52E+00 4.38E+00 Station 9C Cherries collected 7/19/2023 Station 9C Plums collected 8/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.85E+03

+

2.51E+02 1.32E+02 K-40

+

1.91E+03

+

2.55E+02 1.43E+02 MN-54

-9.21E+00 +

1.48E+01 1.96E+01 MN-54

-2.22E+00

+

8.94E+00 1.25E+01 CO-58 7.97E+00

+

7.95E+00 1.02E+01 CO-58

-5.05E+00

+

1.06E+01 1.43E+01 FE-59 0.00E+00

+

3.72E+00 3.88E+01 FE-59

-2.64E+01

+

4.03E+01 5.07E+01 CO-60

-8.41E+00 +

1.54E+01 1.96E+01 CO-60

-1.57E+00

+

1.39E+01 1.86E+01 ZN-65 6.48E+00

+

2.08E+01 2.84E+01 ZN-65 9.93E+00

+

1.64E+01 2.18E+01 ZRNB-95 1.63E+00

+

1.46E+01 2.09E+01 ZRNB-95 3.39E+00

+

1.46E+01 2.06E+01 I-131

-1.06E+00 +

8.69E+00 1.28E+01 I-131 6.07E+00

+

1.11E+01 1.58E+01 CS-134

-4.23E+00 +

1.03E+01 1.44E+01 CS-134

-8.05E-01

+

8.93E+00 1.28E+01 CS-137

-4.18E+00 +

1.17E+01 1.64E+01 CS-137 0.00E+00

+

0.00E+00 1.44E+01 BALA140 3.09E+00

+

8.20E+00 1.14E+01 BALA140

-3.82E+00

+

1.55E+01 2.07E+01 Station 9C Cherries collected 7/19/2023 Station 9C Pears collected 8/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.85E+03

+

2.51E+02 1.32E+02 K-40

+

8.24E+02

+

2.51E+02 1.32E+02 MN-54

-9.21E+00 +

1.48E+01 1.96E+01 MN-54 1.09E+00

+

1.48E+01 1.96E+01 CO-58 7.97E+00

+

7.95E+00 1.02E+01 CO-58

-6.59E+00

+

7.95E+00 1.02E+01 FE-59 0.00E+00

+

3.72E+00 3.88E+01 FE-59 0.00E+00

+

3.72E+00 3.88E+01 CO-60

-8.41E+00 +

1.54E+01 1.96E+01 CO-60

-3.88E+00

+

1.54E+01 1.96E+01 ZN-65 6.48E+00

+

2.08E+01 2.84E+01 ZN-65

-8.94E-01

+

2.08E+01 2.84E+01 ZRNB-95 1.63E+00

+

1.46E+01 2.09E+01 ZRNB-95 3.14E-01

+

1.46E+01 2.09E+01 I-131

-1.06E+00 +

8.69E+00 1.28E+01 I-131

-1.25E+00

+

8.69E+00 1.28E+01 CS-134

-4.23E+00 +

1.03E+01 1.44E+01 CS-134

-2.55E+00

+

1.03E+01 1.44E+01 CS-137

-4.18E+00 +

1.17E+01 1.64E+01 CS-137 0.00E+00

+

1.17E+01 1.64E+01 BALA140 3.09E+00

+

8.20E+00 1.14E+01 BALA140

-2.96E+00

+

8.20E+00 1.14E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 3

TABLE A-16.1 GAMMA SPECTROMETRY RESULTS OF FRUITS Results in pCi/ kilogram (wet)

Station 37 is Indicator - Station 9C is Control Station 9C Apples collected 8/28/2023 Station 9C Apples collected 10/10/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.03E+03

+

9.72E+01 6.69E+01 K-40

+

7.38E+02

+

1.56E+02 1.33E+02 MN-54

-5.13E-01

+

3.60E+00 4.84E+00 MN-54

-7.12E+00

+

1.29E+01 1.71E+01 CO-58 2.57E-01

+

3.04E+00 4.14E+00 CO-58 1.71E+00

+

6.61E+00 9.61E+00 FE-59 2.83E+00

+

1.06E+01 1.36E+01 FE-59 1.17E+01

+

1.91E+01 2.54E+01 CO-60 3.46E+00

+

3.04E+00 3.65E+00 CO-60 7.83E+00

+

7.99E+00 9.98E+00 ZN-65 1.60E+00

+

6.79E+00 8.97E+00 ZN-65 7.49E+00

+

3.49E+01 5.94E+01 ZRNB-95 1.64E+00

+

5.32E+00 7.15E+00 ZRNB-95 2.23E+00

+

1.31E+01 1.90E+01 I-131 3.23E-02

+

4.04E+00 5.75E+00 I-131

+

2.01E+01

+

1.20E+01 1.57E+01 CS-134

-2.05E+00

+

3.56E+00 4.80E+00 CS-134

-5.24E-01

+

2.21E+01 3.72E+01 CS-137 4.86E-01

+

3.46E+00 4.81E+00 CS-137 2.39E+00

+

1.13E+01 1.58E+01 BALA140

-1.81E+00

+

4.69E+00 5.88E+00 BALA140

-4.18E-01

+

1.53E+01 2.13E+01 Station 9C Cantalope collected 8/2/2023 Station 9C Nectarines collected 8/17/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.66E+03

+

1.61E+03 8.39E+01 K-40

+

1.73E+03

+

2.17E+02 1.21E+02 MN-54

-5.08E+00

+

9.46E+00 1.07E+01 MN-54

-3.08E+00

+

9.85E+00 1.34E+01 CO-58 1.22E-01

+

5.60E+00 7.99E+00 CO-58

-1.44E+00

+

7.51E+00 1.05E+01 FE-59

-9.17E+00

+

2.39E+01 2.85E+01 FE-59

-1.61E+01

+

3.23E+01 4.11E+01 CO-60

-3.06E+00

+

1.05E+01 1.27E+01 CO-60

-2.23E+00

+

9.38E+00 1.26E+01 ZN-65

-2.21E+00

+

1.74E+01 2.26E+01 ZN-65

-1.30E+01

+

2.67E+01 3.47E+01 ZRNB-95 3.69E+00

+

8.88E+00 1.12E+01 ZRNB-95 1.25E+00

+

1.12E+01 1.60E+01 I-131 7.90E-01

+

5.58E+00 8.10E+00 I-131 8.39E+00

+

7.89E+00 1.07E+01 CS-134

-2.76E+00

+

6.87E+00 8.77E+00 CS-134 1.86E+00

+

7.82E+00 1.35E+01 CS-137 3.07E-01

+

5.77E+00 8.41E+00 CS-137

-3.88E-01

+

6.45E+00 9.53E+00 BALA140

-2.16E+00

+

8.16E+00 1.02E+01 BALA140

-3.35E-01

+

1.12E+01 1.54E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 3 of 3

TABLE A-16.2 GAMMA SPECTROMETRY RESULTS OF FRUITS -

SUMMARY

Results in pCi/ kilogram (wet)

Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 Ind 1.43E+03 9.08E+02 2.50E+03 1.17E+02 7

7 K-40 Cntl 1.37E+03 7.38E+02 1.91E+03 1.09E+02 9

9 MN-54 Ind 4.10E-01

-4.91E+00 5.18E+00 9.95E+00 7

0 MN-54 Cntl

-3.87E+00

-9.21E+00 1.09E+00 1.27E+01 9

0 CO-58 Ind

-3.35E+00

-1.59E+01 2.63E+00 9.50E+00 7

0 CO-58 Cntl 4.56E-01

-6.59E+00 7.97E+00 9.54E+00 9

0 FE-59 Ind 7.42E+00 3.68E+00 1.11E+01 2.40E+01 7

0 FE-59 Cntl

-4.61E+00

-2.64E+01 1.17E+01 3.17E+01 9

0 CO-60 Ind 2.02E+00

-1.16E+00 7.19E+00 1.11E+01 7

0 CO-60 Cntl

-2.11E+00

-8.41E+00 7.83E+00 1.30E+01 9

0 ZN-65 Ind 1.13E+00

-9.76E+00 5.58E+00 2.50E+01 7

0 ZN-65 Cntl 1.03E+00

-1.30E+01 9.93E+00 2.73E+01 9

0 ZRNB-95 Ind 1.72E+00

-5.63E+00 9.11E+00 2.08E+01 7

0 ZRNB-95 Cntl 1.98E+00 3.14E-01 3.69E+00 1.59E+01 9

0 I-131 Ind

-6.82E-01

-3.83E+00 2.02E+00 1.81E+01 7

0 I-131 Cntl 3.35E+00

-1.93E+00 2.01E+01 1.09E+01 9

1 CS-134 Ind

-1.53E+00

-5.14E+00 2.81E+00 1.14E+01 7

0 CS-134 Cntl

-1.83E+00

-4.23E+00 1.86E+00 1.35E+01 9

0 CS-137 Ind

-1.55E+00

-7.37E+00 4.71E+00 1.20E+01 7

0 CS-137 Cntl

-8.86E-01

-4.18E+00 2.39E+00 1.16E+01 9

0 BALA140 Ind

-2.57E+00

-9.97E+00 3.04E-01 1.78E+01 7

0 BALA140 Cntl

-4.57E-01

-3.82E+00 3.09E+00 1.30E+01 9

0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-17.1 GAMMA SPECTROMETRY RESULTS OF VEGETABLES Results in pCi/ kilogram (wet)

Stations 6, 4B, 37, 48G, and 54 are Indicators - Station 9C is Control Station 37 Broad Leaf Vegtable collected 7/21/2022 Station 37 Broad Leaf Vegtable collected 8/27/2022 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

6.53E+03 +

5.22E+02 2.47E+02 K-40

+

3.47E+03 +

1.77E+02 1.02E+02 MN-54 4.04E+00 +

1.19E+01 1.64E+01 MN-54 1.69E-01 +

6.62E+00 8.72E+00 CO-58

-7.19E+00 +

1.60E+01 2.21E+01 CO-58

-5.14E+00 +

8.33E+00 1.08E+01 FE-59

-7.52E+00 +

4.79E+01 6.43E+01 FE-59

-1.62E-01 +

2.78E+01 3.48E+01 CO-60 3.10E+00 +

1.31E+01 1.81E+01 CO-60

-1.16E+00 +

7.56E+00 9.43E+00 ZN-65

-2.84E+01 +

4.62E+01 5.92E+01 ZN-65

-7.22E+00 +

1.67E+01 2.11E+01 ZRNB-95 4.15E+00 +

2.49E+01 3.53E+01 ZRNB-95 4.18E+00 +

1.44E+01 1.89E+01 I-131

-5.68E+00 +

2.06E+01 3.02E+01 I-131

-1.49E+01 +

7.47E+01 3.63E+00 CS-134

-4.28E+00 +

1.66E+01 2.30E+01 CS-134

-2.06E+00 +

6.77E+00 1.13E+01 CS-137 3.50E+00 +

2.17E+01 3.00E+01 CS-137 1.49E+00 +

6.10E+00 8.23E+00 BALA140 6.14E+00 +

5.50E+00 9.06E+00 BALA140 3.05E+00 +

3.67E+01 4.50E+01 Station 37 Swiss Chard collected 9/23/2022 Station 37 Tomatoes collected 9/23/2022 Nuclide RQ Activity MDA Nuclide RQ Activity Error MDA K-40

+

6.82E+03 +

6.19E+02 2.15E+02 K-40

+

2.64E+03 +

4.51E+02 3.21E+02 MN-54

-6.59E+00 +

2.09E+01 2.84E+01 MN-54

-6.41E+00 +

2.26E+01 3.11E+01 CO-58 9.02E+00 +

1.51E+01 2.04E+01 CO-58

-3.90E+00 +

2.04E+01 2.85E+01 FE-59

-5.90E-01 +

5.71E+01 7.70E+01 FE-59 2.11E+01 +

4.14E+01 5.53E+01 CO-60

-7.11E+00 +

2.60E+01 3.40E+01 CO-60 7.85E+00 +

2.03E+01 2.72E+01 ZN-65 2.64E+01 +

4.66E+01 6.07E+01 ZN-65

-2.52E+01 +

5.67E+01 7.47E+01 ZRNB-95 8.84E+00 +

2.54E+01 3.53E+01 ZRNB-95 2.18E+01 +

2.15E+01 2.72E+01 I-131

-1.16E+01 +

2.50E+01 3.53E+01 I-131 1.58E+00 +

2.39E+01 3.53E+01 CS-134

-3.46E+00 +

1.82E+01 2.56E+01 CS-134

-1.32E+01 +

2.25E+01 3.07E+01 CS-137 8.76E+00 +

1.54E+01 2.14E+01 CS-137 5.25E+00 +

2.08E+01 2.96E+01 BALA140 4.47E+00 +

2.11E+01 2.90E+01 BALA140

-1.65E+01 +

3.73E+01 4.77E+01 Station 37 Cabbage collected 6/2/2023 Station 37 Asparagus collected 6/12/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

3.59E+03 +

4.49E+02 2.35E+02 K-40

+

1.54E+03 +

1.98E+02 1.02E+02 MN-54

-3.41E-01 +

1.47E+01 2.11E+01 MN-54

-3.84E+00 +

8.27E+00 1.12E+01 CO-58 5.84E+00 +

1.44E+01 1.98E+01 CO-58 6.11E-01 +

6.64E+00 9.46E+00 FE-59 2.86E+00 +

4.70E+01 6.42E+01 FE-59 3.68E+00 +

2.05E+01 2.76E+01 CO-60

-9.66E-01 +

1.54E+01 2.18E+01 CO-60

-1.07E-01 +

8.22E+00 1.11E+01 ZN-65 8.37E-01 +

2.90E+01 4.16E+01 ZN-65

-5.01E+00 +

2.07E+01 2.71E+01 ZRNB-95 1.78E+00 +

2.91E+01 4.11E+01 ZRNB-95 5.30E+00 +

1.03E+01 1.41E+01 I-131

-3.73E+00 +

1.81E+01 2.63E+01 I-131

-4.40E+00 +

8.01E+00 1.13E+01 CS-134

-4.08E+00 +

1.69E+01 2.38E+01 CS-134

-5.73E+00 +

9.59E+00 1.30E+01 CS-137

-3.36E+00 +

1.73E+01 2.47E+01 CS-137

-1.93E+00 +

8.77E+00 1.24E+01 BALA140

-6.90E-01 +

2.31E+01 3.18E+01 BALA140 6.82E-01 +

7.93E+00 1.08E+01 Station 37 Cabbage collected 6/30/2023 Station 37 Yellow Corn collected 7/19/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-7.45E+01 +

2.93E+02 4.93E+02 K-40

+

1.95E+03 +

1.89E+03 1.08E+02 MN-54

-2.30E+00 +

8.21E+00 1.13E+01 MN-54 3.54E+00 +

6.75E+00 7.88E+00 CO-58 5.25E+00 +

6.13E+00 8.00E+00 CO-58 3.15E+00 +

7.31E+00 9.07E+00 FE-59

-7.31E-01 +

2.19E+01 2.97E+01 FE-59 1.88E+00 +

1.75E+01 2.40E+01 CO-60

-7.79E+00 +

1.25E+01 1.54E+01 CO-60 4.67E+00 +

8.74E+00 9.45E+00 ZN-65

-1.30E+01 +

2.27E+01 3.81E+01 ZN-65

-1.73E+01 +

3.18E+01 3.39E+01 ZRNB-95 6.57E+00 +

1.12E+01 1.51E+01 ZRNB-95

-9.43E+00 +

1.81E+01 2.08E+01 I-131

-2.77E+00 +

9.63E+00 1.38E+01 I-131

-1.27E+00 +

7.58E+00 1.09E+01 CS-134 2.42E-01 +

1.19E+01 2.04E+01 CS-134

-5.39E+00 +

1.04E+01 1.23E+01 CS-137 3.71E-01 +

8.40E+00 1.21E+01 CS-137 5.44E+00 +

1.17E+01 1.43E+01 BALA140 2.20E+00 +

6.46E+00 8.83E+00 BALA140 1.29E+00 +

7.73E+00 1.03E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 3

TABLE A-17.1 GAMMA SPECTROMETRY RESULTS OF VEGETABLES Results in pCi/ kilogram (wet)

Stations 6, 4B, 37, 48G, and 54 are Indicators - Station 9C is Control Station 9C Cilantro collected 6/2/2023 Station 9C Cabbage collected 6/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

6.83E+03 +

6.18E+02 2.14E+02 K-40

+

1.51E+03 +

2.48E+02 1.55E+02 MN-54 7.40E+00 +

1.56E+01 2.13E+01 MN-54 3.11E+00 +

9.46E+00 1.33E+01 CO-58 6.93E+00 +

1.85E+01 2.52E+01 CO-58

-1.50E+00 +

1.09E+01 1.55E+01 FE-59 1.85E+01 +

5.36E+01 7.03E+01 FE-59

-1.46E+01 +

3.58E+01 4.69E+01 CO-60

-1.15E+01 +

2.77E+01 3.56E+01 CO-60 5.99E+00 +

1.02E+01 1.34E+01 ZN-65

-1.86E+01 +

5.20E+01 6.86E+01 ZN-65

-1.53E+00 +

2.37E+01 3.35E+01 ZRNB-95 1.41E+01 +

2.90E+01 3.94E+01 ZRNB-95

-1.30E+01 +

2.35E+01 3.15E+01 I-131 1.89E+00 +

2.00E+01 2.91E+01 I-131

-5.58E+00 +

1.45E+01 2.07E+01 CS-134 6.19E+00 +

1.32E+01 1.85E+01 CS-134 5.46E+00 +

8.12E+00 1.12E+01 CS-137 7.36E+00 +

1.63E+01 2.28E+01 CS-137

-1.22E+00 +

1.05E+01 1.53E+01 BALA140

-2.79E+00 +

1.95E+01 2.71E+01 BALA140 5.05E-01 +

1.38E+01 1.96E+01 6/2/2023 6/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.67E+03 +

1.94E+02 9.26E+01 K-40

+

2.41E+03 +

2.72E+02 1.26E+02 MN-54 1.29E+00 +

5.55E+00 7.83E+00 MN-54 4.46E+00 +

7.35E+00 9.94E+00 CO-58 1.65E+00 +

5.67E+00 7.94E+00 CO-58

-1.52E+00 +

1.03E+01 1.44E+01 FE-59 0.00E+00 +

3.22E+00 2.52E+01 FE-59 2.17E+00 +

2.79E+01 3.77E+01 CO-60 2.99E+00 +

5.61E+00 7.27E+00 CO-60

-6.55E+00 +

1.54E+01 1.92E+01 ZN-65

-1.31E+01 +

2.08E+01 2.62E+01 ZN-65

-1.15E+01 +

2.93E+01 3.75E+01 ZRNB-95 1.43E+00 +

1.11E+01 1.57E+01 ZRNB-95

-3.13E+00 +

1.64E+01 2.28E+01 I-131

-2.58E-01 +

7.39E+00 1.09E+01 I-131 3.22E+00 +

1.11E+01 1.60E+01 CS-134

-4.92E+00 +

8.24E+00 1.12E+01 CS-134

-6.07E+00 +

1.03E+01 1.40E+01 CS-137 6.76E-01 +

7.30E+00 1.05E+01 CS-137 4.18E+00 +

9.09E+00 1.27E+01 BALA140

-2.07E+00 +

9.95E+00 1.30E+01 BALA140

-3.87E+00 +

1.41E+01 1.82E+01 8/2/2023 Station 48G Tomatoes c 8/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

4.69E+03 +

4.52E+03 1.36E+02 K-40

+

1.48E+03 +

2.18E+02 1.24E+02 MN-54 3.78E+00 +

9.40E+00 1.18E+01 MN-54 1.00E+00 +

7.41E+00 1.07E+01 CO-58 7.63E+00 +

1.00E+01 8.59E+00 CO-58

-1.84E+00 +

9.58E+00 1.34E+01 FE-59 1.36E+01 +

2.60E+01 2.89E+01 FE-59 5.49E+00 +

2.26E+01 3.09E+01 CO-60

-1.50E+00 +

1.38E+01 1.77E+01 CO-60

-2.40E+00 +

1.06E+01 1.44E+01 ZN-65

-1.25E+01 +

3.65E+01 5.84E+01 ZN-65

-1.35E+01 +

2.80E+01 3.67E+01 ZRNB-95 6.14E+00 +

1.74E+01 2.23E+01 ZRNB-95

-1.10E+01 +

2.09E+01 2.79E+01 I-131 3.13E+00 +

8.77E+00 1.18E+01 I-131 6.35E+00 +

1.10E+01 1.56E+01 CS-134 8.11E-01 +

1.61E+01 2.75E+01 CS-134 1.99E+00 +

6.68E+00 9.60E+00 CS-137 5.43E+00 +

1.21E+01 1.51E+01 CS-137 1.47E+00 +

1.08E+01 1.54E+01 BALA140

-3.01E+00 +

1.43E+01 1.77E+01 BALA140

-3.77E+00 +

1.53E+01 2.05E+01 8/16/2023 8/17/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

3.78E+03 +

3.62E+02 1.33E+02 K-40

+

3.09E+03 +

3.08E+02 1.42E+02 MN-54 5.33E+00 +

7.70E+00 1.03E+01 MN-54

-1.07E+00 +

1.02E+01 1.41E+01 CO-58

-4.19E+00 +

1.35E+01 1.83E+01 CO-58

-1.54E+00 +

7.98E+00 1.12E+01 FE-59 5.15E+00 +

2.86E+01 3.86E+01 FE-59

-3.65E+00 +

3.36E+01 4.44E+01 CO-60 1.21E+00 +

1.12E+01 1.55E+01 CO-60

-2.66E+00 +

1.25E+01 1.65E+01 ZN-65

-1.30E+00 +

2.86E+01 3.90E+01 ZN-65

-1.05E+01 +

2.92E+01 3.83E+01 ZRNB-95 2.35E+00 +

1.58E+01 2.24E+01 ZRNB-95 3.30E+00 +

1.56E+01 2.18E+01 I-131

-2.51E+00 +

9.89E+00 1.42E+01 I-131

-7.28E+00 +

1.34E+01 1.89E+01 CS-134

-1.28E+00 +

1.05E+01 1.49E+01 CS-134

-2.85E+00 +

9.45E+00 1.32E+01 CS-137

-3.69E+00 +

1.34E+01 1.88E+01 CS-137 4.52E+00 +

7.79E+00 1.08E+01 BALA140 2.21E+00 +

1.04E+01 1.43E+01 BALA140 3.81E-01 +

1.04E+01 1.48E+01 Station 9C Cabbage collected Station 9C Cabbage collected Station ST-54 Butternut Squash collected Station 4B Purslane collected Station 4B Broad Leaf Vegtable collected RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 3

TABLE A-17.1 GAMMA SPECTROMETRY RESULTS OF VEGETABLES Results in pCi/ kilogram (wet)

Stations 6, 4B, 37, 48G, and 54 are Indicators - Station 9C is Control Station ST-54 Pumpkin c 8/17/2023 8/29/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

2.12E+03 +

2.45E+02 1.10E+02 K-40

+

4.06E+03 +

3.21E+02 1.30E+02 MN-54

-8.00E-01 +

8.75E+00 1.23E+01 MN-54 2.92E-01 +

7.88E+00 1.11E+01 CO-58 1.62E+00 +

7.94E+00 1.12E+01 CO-58 9.35E-01 +

6.29E+00 8.91E+00 FE-59 6.04E-01 +

2.71E+01 3.68E+01 FE-59

-6.89E-01 +

2.79E+01 3.68E+01 CO-60 7.54E-01 +

8.06E+00 1.13E+01 CO-60 4.56E+00 +

9.23E+00 1.17E+01 ZN-65 4.37E+00 +

1.74E+01 2.39E+01 ZN-65

-2.99E+00 +

2.42E+01 3.14E+01 ZRNB-95

-1.19E+01 +

1.99E+01 2.64E+01 ZRNB-95 5.48E+00 +

1.06E+01 1.44E+01 I-131

-1.55E+00 +

1.08E+01 1.57E+01 I-131 8.10E-01 +

7.00E+00 8.16E-01 CS-134

-5.00E+00 +

1.17E+01 1.60E+01 CS-134

-4.78E+00 +

8.09E+00 1.10E+01 CS-137

-2.62E+00 +

8.96E+00 1.27E+01 CS-137 4.55E+00 +

8.76E+00 1.21E+01 BALA140 4.93E+00 +

8.49E+00 1.12E+01 BALA140

-4.30E+00 +

1.05E+01 1.31E+01 09/27/23 Station 4B Cucumbers 10/02/23 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.14E+04 +

7.79E+02 2.47E+02 K-40

+

1.58E+03 +

2.09E+02 1.18E+02 MN-54 4.63E+00 +

1.50E+01 2.07E+01 MN-54

-6.78E+00 +

1.17E+01 1.55E+01 CO-58 4.81E+00 +

1.92E+01 2.63E+01 CO-58 0.00E+00 +

0.00E+00 1.16E+01 FE-59 2.69E+01 +

5.71E+01 7.32E+01 FE-59

-8.52E-01 +

1.97E+01 2.83E+01 CO-60

-5.66E+00 +

2.35E+01 3.07E+01 CO-60

-6.03E-01 +

9.38E+00 1.32E+01 ZN-65

-2.97E+01 +

6.25E+01 8.06E+01 ZN-65

-9.44E+00 +

2.37E+01 3.13E+01 ZRNB-95

-1.45E+01 +

3.39E+01 4.56E+01 ZRNB-95

-8.99E+00 +

1.60E+01 2.21E+01 I-131

-8.35E+00 +

2.73E+01 3.91E+01 I-131

-7.21E-01 +

7.47E+00 1.15E+01 CS-134 6.52E+00 +

1.31E+01 1.82E+01 CS-134

-6.31E+00 +

1.14E+01 1.55E+01 CS-137

-1.33E+01 +

2.31E+01 3.14E+01 CS-137

-4.70E+00 +

1.07E+01 1.48E+01 BALA140 1.12E+01 +

9.18E+00 1.38E+01 BALA140

-4.55E+00 +

1.29E+01 1.72E+01 10/10/23 Nuclide RQ Activity Error MDA K-40

+

1.93E+03 +

1.88E+03 1.64E+02 MN-54 5.56E+00 +

8.34E+00 8.36E+00 CO-58

-8.72E+00 +

1.63E+01 1.85E+01 FE-59 3.12E+00 +

2.60E+01 3.51E+01 CO-60

-4.06E+00 +

1.27E+01 1.56E+01 ZN-65

-2.59E+00 +

2.31E+01 3.07E+01 ZRNB-95

-1.34E+01 +

2.57E+01 2.94E+01 I-131

-2.79E+00 +

9.72E+00 1.35E+01 CS-134

-2.79E+00 +

1.06E+01 1.44E+01 CS-137

-5.42E+00 +

1.43E+01 1.84E+01 BALA140

-9.58E+00 +

1.92E+01 2.05E+01 Station ST-6 Feed Corn collected Station 4B Broad Leaf Vegtable collected Station 4B Broad Leaf Vegtable collected RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 3 of 3

TABLE A-17.2 GAMMA SPECTROMETRY RESULTS OF VEGETABLES -

SUMMARY

Results in pCi/ kilogram (wet)

Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 Ind 3.56E+03

-7.45E+01 1.14E+04 1.84E+02 17 16 K-40 Cntl 3.11E+03 1.51E+03 6.83E+03 1.47E+02 4

4 MN-54 Ind 1.10E-02

-6.78E+00 5.56E+00 1.48E+01 17 0

MN-54 Cntl 4.06E+00 1.29E+00 7.40E+00 1.31E+01 4

0 CO-58 Ind 3.73E-01

-8.72E+00 9.02E+00 1.51E+01 17 0

CO-58 Cntl 1.39E+00

-1.52E+00 6.93E+00 1.58E+01 4

0 FE-59 Ind 4.13E+00

-7.52E+00 2.69E+01 4.29E+01 17 0

FE-59 Cntl 1.51E+00

-1.46E+01 1.85E+01 4.50E+01 4

0 CO-60 Ind

-6.98E-01

-7.79E+00 7.85E+00 1.72E+01 17 0

CO-60 Cntl

-2.26E+00

-1.15E+01 5.99E+00 1.89E+01 4

0 ZN-65 Ind

-8.65E+00

-2.97E+01 2.64E+01 4.28E+01 17 0

ZN-65 Cntl

-1.12E+01

-1.86E+01

-1.53E+00 4.14E+01 4

0 ZRNB-95 Ind 3.70E-02

-1.45E+01 2.18E+01 2.59E+01 17 0

ZRNB-95 Cntl

-1.53E-01

-1.30E+01 1.41E+01 2.73E+01 4

0 I-131 Ind

-3.27E+00

-1.49E+01 6.35E+00 1.81E+01 17 0

I-131 Cntl

-1.82E-01

-5.58E+00 3.22E+00 1.92E+01 4

0 CS-134 Ind

-3.04E+00

-1.32E+01 6.52E+00 1.77E+01 17 0

CS-134 Cntl 1.64E-01

-6.07E+00 6.19E+00 1.37E+01 4

0 CS-137 Ind 3.41E-01

-1.33E+01 8.76E+00 1.78E+01 17 0

CS-137 Cntl 2.75E+00

-1.22E+00 7.36E+00 1.53E+01 4

0 BALA140 Ind

-3.40E-01

-1.65E+01 1.12E+01 1.97E+01 17 0

BALA140 Cntl

-2.06E+00

-3.87E+00 5.05E-01 1.95E+01 4

0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE B-1.1 2023 QUARTERLY SPECIAL INTEREST DOSIMETER RESULTS Results in milli-Roentgen (mR) per Standard Quarter Station ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Quarterly Sum 58 22.7 31.0 28.0 29.0 110.7 88 32.5 34.1 40.3 39.1 146.0 89 33.6 34.1 40.3 39.1 147.1 119B 28.2 32.1 38.5 33.0 131.8 119Ctrl 32.5 37.2 36.7 31.0 137.4 121 99.9 61.8 87.7 83.7 333.0 122 32.5 43.3 39.4 42.1 157.4 123 (ISFSI) 80.3 83.3 69.2 79.6 312.5 124 (ISFSI) 90.1 95.6 95.6 87.7 369.0 125 (ISFSI) 77.0 82.3 76.3 72.5 308.1 126 (ISFSI) 112.9 112.0 105.3 99.9 430.0 127 (ISFSI) 90.1 87.4 93.0 82.6 353.1 128 (ISFSI) 128.1 127.4 118.4 117.1 491.0 129 (ISFSI) 108.6 108.9 119.3 101.9 438.7 130 (ISFSI) 119.4 117.1 115.8 104.9 457.3 131 (ISFSI) 104.2 105.9 96.5 88.7 395.3 136B(ISFSI) 202.0 182.7 190.5 151.5 726.7 137B (ISFSI) 278.0 265.7 238.8 233.5 1016.1 138B (ISFSI) 220.4 212.4 207.2 187.0 827.0 150 (Site 1) 18.4 29.0 29.7 25.9 103.0 151 (Site 4) 20.6 34.1 26.2 28.0 108.8 155 26.0 33.1 34.1 32.0 125.2 156 32.5 36.2 35.0 35.0 138.7 TABLE B-1.2 2023 QUARTERLY SPECIAL INTEREST DOSIMETER RESULTS-

SUMMARY

Results in milli-Roentgen (mR) per Standard Quarter Average Activity Activity Low Activity High Number of Samples ISFSI Quarterly Ind 127.6 69.2 278.0 48 SITE 1 & 4 Quarterly Ind 26.5 18.4 34.1 8

Quarterly Control Dosimeters 29.8 24.6 34.9 4

Station 121 results high due to location being near the turbine building. Staion 122 results influenced by ISFSI.

Quarterly Control dosimeter location is ST-9. See Table A-1.1.

Stations 130 and 131 were added to the ISFSI fence in the 1st quarter 2017.

Stations 136B, 137B, and 138B are where the newest spent fuel is stored in the ISFSI.

Location Stations 58, 88, and 89 were established in 2009 to monitor exposure from remediation work at the DOE 618-11 burial site.

Page 1 of 1

Table B - 2.1 GAMMA SPECTROMETRY RESULTS OF STORM DRAIN WATER STATION 101B Results in pCi/liter, corrected for decay during collection period Location ST-101 collected 2/2/2023 Location ST-101 collected 3/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.15E+01 +

6.04E+01 8.93E+01 K-40

-1.56E+01 +

5.85E+01 8.56E+01 CR-51

-2.44E+01 +

4.45E+01 6.17E+01 CR-51 2.47E+01 +

3.46E+01 4.79E+01 MN-54 1.48E+00 +

4.01E+00 5.38E+00 MN-54

-1.34E-01 +

3.91E+00 5.37E+00 CO-58

-1.10E+00 +

4.08E+00 5.51E+00 CO-58

-1.69E+00 +

4.71E+00 6.28E+00 FE-59 2.78E-01

+

1.02E+01 1.36E+01 FE-59

-3.84E+00 +

1.28E+01 1.64E+01 CO-60

-1.14E-01 +

4.61E+00 6.09E+00 CO-60 3.30E+00 +

3.75E+00 4.63E+00 ZN-65

-6.48E+00 +

9.86E+00 1.26E+01 ZN-65 1.25E+00 +

8.31E+00 1.11E+01 ZRNB-95 4.12E+00 +

6.87E+00 9.08E+00 ZRNB-95 7.08E-01

+

7.71E+00 1.05E+01 I-131

-7.57E-01 +

6.34E+00 8.99E+00 I-131 0.00E+00 +

2.50E+00 8.16E+00 CS-134

-1.72E+00 +

4.33E+00 5.90E+00 CS-134

-1.39E+00 +

4.21E+00 5.76E+00 CS-137 5.28E-01

+

4.27E+00 5.96E+00 CS-137 3.69E+00 +

4.41E+00 5.89E+00 BALA140 1.40E+00 +

6.74E+00 8.63E+00 BALA140

-4.04E-01 +

6.32E+00 8.19E+00 BI-214 6.81E+00 +

9.46E+00 1.35E+01 BI-214

-5.92E+00 +

9.86E+00 1.48E+01 Location ST-101 collected 4/3/2023 Location ST-101 collected 5/1/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-2.06E+01 +

4.37E+01 6.21E+01 K-40

-1.68E+01 +

5.26E+01 7.98E+01 CR-51

-1.46E+01 +

2.66E+01 3.68E+01 CR-51 1.40E+00 +

3.45E+01 4.91E+01 MN-54 5.48E-01

+

3.06E+00 4.08E+00 MN-54

-1.42E+00 +

4.69E+00 6.27E+00 CO-58

-3.32E-01 +

2.91E+00 3.89E+00 CO-58

-8.09E-02 +

4.21E+00 5.76E+00 FE-59 3.55E+00 +

7.01E+00 8.81E+00 FE-59

-2.69E-01 +

1.09E+01 1.44E+01 CO-60 4.93E-01

+

2.53E+00 3.28E+00 CO-60

-1.52E-01 +

5.01E+00 6.57E+00 ZN-65 2.91E+00 +

5.59E+00 7.19E+00 ZN-65

-6.84E+00 +

1.11E+01 1.41E+01 ZRNB-95 8.02E-01

+

4.75E+00 6.35E+00 ZRNB-95

-5.59E-01 +

7.90E+00 1.07E+01 I-131 4.89E-02

+

3.24E+00 4.57E+00 I-131 1.44E+00 +

4.99E+00 7.04E+00 CS-134 1.23E+00 +

2.47E+00 3.34E+00 CS-134

-1.07E-01 +

3.81E+00 5.33E+00 CS-137

-1.98E-01 +

2.95E+00 4.07E+00 CS-137 1.32E-01

+

4.90E+00 6.84E+00 BALA140

-6.70E-01 +

4.09E+00 5.11E+00 BALA140 0.00E+00 +

8.31E-01 8.51E+00 BI-214

-7.97E+00 +

6.73E+00 1.01E+01 BI-214 1.11E+01 +

9.37E+00 1.31E+01 Location ST-101 collected 6/1/2023 Location ST-101 collected 6/29/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.10E+01 +

3.46E+01 4.77E+01 K-40 2.40E+01 +

5.92E+01 8.37E+01 CR-51 5.03E+00 +

2.61E+01 3.69E+01 CR-51

-1.58E+00 +

3.87E+01 5.48E+01 MN-54

-3.72E-01 +

3.04E+00 4.13E+00 MN-54

-3.36E+00 +

5.34E+00 6.99E+00 CO-58 1.98E+00 +

2.88E+00 3.78E+00 CO-58

-7.91E-01 +

4.39E+00 5.94E+00 FE-59 6.60E+00 +

6.21E+00 7.51E+00 FE-59 1.55E+00 +

1.12E+01 1.46E+01 CO-60

-1.72E+00 +

4.29E+00 5.29E+00 CO-60

-1.25E+00 +

4.70E+00 6.08E+00 ZN-65

-5.55E+00 +

8.65E+00 1.07E+01 ZN-65 2.64E-01

+

8.23E+00 1.11E+01 ZRNB-95 8.86E-01

+

5.17E+00 7.01E+00 ZRNB-95 8.97E-01

+

7.88E+00 1.07E+01 I-131 7.44E-01

+

3.73E+00 5.30E+00 I-131

-1.04E+00 +

5.88E+00 8.32E+00 CS-134

-7.58E-01 +

3.46E+00 4.74E+00 CS-134

-2.71E+00 +

4.52E+00 6.09E+00 CS-137

-2.21E+00 +

3.69E+00 4.99E+00 CS-137 2.56E+00 +

4.77E+00 6.47E+00 BALA140

-2.30E+00 +

5.76E+00 6.97E+00 BALA140 2.94E+00 +

5.74E+00 7.19E+00 BI-214 3.57E+00 +

8.60E+00 1.21E+01 BI-214 8.92E+00 +

1.01E+01 1.42E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 2

Table B - 2.1 GAMMA SPECTROMETRY RESULTS OF STORM DRAIN WATER STATION 101B Results in pCi/liter, corrected for decay during collection period Location ST-101 collected 7/31/2023 Location ST-101 collected 8/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.16E+01 +

5.86E+01 8.75E+01 K-40 3.01E+01 +

5.19E+01 7.57E+01 CR-51

-3.84E+00 +

3.55E+01 5.02E+01 CR-51

-1.06E+01 +

4.23E+01 5.94E+01 MN-54

-1.82E+00 +

4.71E+00 6.26E+00 MN-54 1.87E+00 +

3.66E+00 4.87E+00 CO-58

-1.34E-01 +

3.90E+00 5.35E+00 CO-58

-2.36E+00 +

5.04E+00 6.67E+00 FE-59 7.19E+00 +

9.83E+00 1.23E+01 FE-59 8.78E+00 +

9.46E+00 1.16E+01 CO-60 1.56E+00 +

4.07E+00 5.26E+00 CO-60 2.47E+00 +

4.38E+00 5.56E+00 ZN-65

-8.25E+00 +

1.24E+01 1.58E+01 ZN-65

-5.19E+00 +

1.03E+01 1.34E+01 ZRNB-95

-3.10E+00 +

7.99E+00 1.06E+01 ZRNB-95 2.19E+00 +

7.22E+00 9.73E+00 I-131 1.35E+00 +

4.26E+00 6.02E+00 I-131 1.52E+00 +

7.22E+00 1.02E+01 CS-134

-2.03E+00 +

4.23E+00 5.75E+00 CS-134

-2.15E-01 +

4.00E+00 5.57E+00 CS-137

-2.64E+00 +

5.16E+00 7.01E+00 CS-137

-7.92E-01 +

5.28E+00 7.29E+00 BALA140 1.15E+00 +

4.60E+00 5.97E+00 BALA140 6.44E+00 +

6.98E+00 8.37E+00 BI-214 3.17E+00 +

1.06E+01 1.52E+01 BI-214 2.95E+00 +

9.31E+00 1.36E+01 Location ST-101 collected 9/28/2023 Location ST-101 collected 10/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.10E+01 +

5.24E+01 4.77E+01 K-40 3.91E+01 +

4.29E+01 5.97E+01 CR-51

-9.78E+00 +

3.65E+01 4.96E+01 CR-51 9.51E+00 +

2.24E+01 3.25E+01 MN-54 2.03E+00 +

3.66E+00 4.06E+00 MN-54

-2.35E+00 +

3.99E+00 5.23E+00 CO-58

-1.56E+00 +

4.09E+00 5.04E+00 CO-58

-5.80E-01 +

3.10E+00 4.32E+00 FE-59

-7.20E+00 +

1.40E+01 1.52E+01 FE-59

-1.20E+00 +

7.66E+00 1.03E+01 CO-60 1.06E+00 +

3.52E+00 4.23E+00 CO-60 1.23E+00 +

3.72E+00 4.99E+00 ZN-65 2.31E-01

+

8.28E+00 1.42E+01 ZN-65 3.06E+00 +

7.81E+00 1.32E+01 ZRNB-95 3.66E-02

+

5.83E+00 7.97E+00 ZRNB-95

-1.17E+00 +

5.75E+00 7.97E+00 I-131

-2.81E+00 +

1.04E+01 1.42E+01 I-131

-6.11E-02 +

3.34E+00 4.94E+00 CS-134 1.53E-02

+

4.97E+00 8.39E+00 CS-134

-1.77E+00 +

4.86E+00 8.12E+00 CS-137

-2.47E+00 +

4.85E+00 5.70E+00 CS-137

-1.54E+00 +

3.86E+00 5.26E+00 BALA140

-9.94E-01 +

9.41E+00 1.16E+01 BALA140

-8.03E-01 +

4.07E+00 5.33E+00 BI-214

+

4.12E+01 +

4.10E+01 1.11E+01 BI-214

+

3.41E+01 +

7.50E+00 8.68E+00 Location ST-101 collected 11/30/2023 Location ST-101 collected 12/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.54E+01 +

4.40E+01 5.97E+01 K-40 2.34E+00 +

4.33E+01 5.86E+01 CR-51

-1.45E+01 +

2.71E+01 3.90E+01 CR-51

-1.46E+01 +

3.35E+01 4.25E+01 MN-54 1.36E-01

+

3.04E+00 4.15E+00 MN-54

-1.03E+00 +

3.52E+00 4.52E+00 CO-58

-9.86E-01 +

3.19E+00 4.40E+00 CO-58

-1.43E+00 +

3.72E+00 4.60E+00 FE-59

-5.22E-01 +

8.46E+00 1.14E+01 FE-59 2.43E+00 +

7.57E+00 9.33E+00 CO-60 9.27E-01

+

2.91E+00 4.01E+00 CO-60 1.87E+00 +

4.11E+00 4.55E+00 ZN-65

-5.92E+00 +

1.15E+01 1.47E+01 ZN-65

-3.93E+00 +

9.12E+00 1.04E+01 ZRNB-95 3.42E-01

+

5.13E+00 7.22E+00 ZRNB-95 8.41E-01

+

5.57E+00 7.46E+00 I-131

-9.29E-01 +

3.84E+00 5.63E+00 I-131

-7.92E-01 +

4.91E+00 6.88E+00 CS-134

-2.01E+00 +

4.92E+00 8.22E+00 CS-134 7.60E-01

+

2.95E+00 3.94E+00 CS-137 4.01E+00 +

3.79E+00 4.99E+00 CS-137 1.02E+00 +

3.26E+00 4.28E+00 BALA140 1.26E+00 +

4.33E+00 5.65E+00 BALA140

-2.60E+00 +

6.51E+00 7.28E+00 BI-214

+

2.47E+01 +

7.87E+00 9.74E+00 BI-214

-7.86E+00 +

1.07E+01 1.10E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 2

TABLE B-2.2 GAMMA SPECTROMETRY RESULTS OF STORTM DRAIN WATER -

SUMMARY

STATION 101B Results in pCi/liter, corrected for decay during collection period Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 8.07E+00

-4.16E+01 5.54E+01 6.98E+01 12 0

CR-51

-4.44E+00

-2.44E+01 2.47E+01 4.67E+01 12 0

MN-54

-3.68E-01

-3.36E+00 2.03E+00 5.11E+00 12 0

CO-58

-7.55E-01

-2.36E+00 1.98E+00 5.13E+00 12 0

FE-59 1.44E+00

-7.20E+00 8.78E+00 1.21E+01 12 0

CO-60 8.06E-01

-1.72E+00 3.30E+00 5.04E+00 12 0

ZN-65

-2.87E+00

-8.25E+00 3.06E+00 1.24E+01 12 0

ZRNB-95 5.16E-01

-3.10E+00 4.12E+00 9.30E+00 12 0

I-131

-1.08E-01

-2.81E+00 1.52E+00 7.52E+00 12 0

CS-134

-8.92E-01

-2.71E+00 1.23E+00 5.93E+00 12 0

CS-137 1.75E-01

-2.64E+00 4.01E+00 5.73E+00 12 0

BALA140 4.51E-01

-2.60E+00 6.44E+00 7.40E+00 12 0

BI-214 9.57E+00

-7.97E+00 4.12E+01 1.23E+01 12 3

Page 1 of 1

TABLE B-3.1 GROSS BETA IN STORM DRAIN WATER Results in pCi/liter Location Collection Period RQ Activity Error MDA ST-101B 12/29/22 - 01/29/23 5.40E-01

+

5.84E-01 1.98E+00 01/29/23 - 02/27/23 2.25E-01

+

6.49E-01 2.30E+00 02/27/23 - 03/30/23 1.15E+00

+

6.53E-01 2.07E+00 03/30/23 - 05/01/23 4.65E-01

+

6.71E-01 2.29E+00 05/01/23 - 06/01/23

+

6.57E+00

+

1.08E+00 2.48E+00 06/01/23 - 06/29/23

+

2.68E+00

+

8.55E-01 2.53E+00 06/29/23 - 07/31/23 1.51E+00

+

7.71E-01 2.46E+00 07/31/23 - 08/31/23

+

4.25E+00

+

8.77E-01 2.32E+00 08/31/23 - 09/28/23 6.84E-01

+

6.88E-01 2.36E+00 09/28/23 - 10/30/23 1.73E+00

+

7.60E-01 2.37E+00 10/30/23 - 11/30/23

+

3.39E+00

+

7.52E-01 1.88E+00 11/30/23 - 12/28/23 6.94E-01

+

6.28E-01 2.10E+00 TABLE B-3.2 GROSS BETA IN STORM DRAIN WATER -

SUMMARY

Results in pCi/liter Average Activity Activity Low Activity High Number of Samples Number of Positive IDs 1.99E+00 2.25E-01 6.57E+00 12 4

TABLE B-4.1 TRITIUM IN STORM DRAIN WATER Results in pCi/liter Location Collection Period RQ Activity Error ST-101B 12/29/22 -

01/29/23

+

3.56E+03

+

1.67E+02 01/29/23 -

02/27/23

+

7.97E+02

+

1.16E+02 02/27/23 -

03/30/23 5.07E+01

+

9.50E+01 03/30/23 -

05/01/23

+

3.61E+03

+

1.78E+02 05/01/23 -

06/01/23 2.82E+02

+

1.06E+02 06/01/23 -

06/29/23

+

8.50E+02

+

1.19E+02 06/29/23 -

07/31/23 2.94E+02

+

1.14E+02 07/31/23 -

08/31/23

+

8.63E+02

+

1.18E+02 08/31/23 -

09/28/23

+

5.52E+02

+

1.25E+02 09/28/23 -

10/30/23

+

1.17E+03

+

1.31E+02 10/30/23 -

11/30/23

+

5.04E+03

+

2.12E+02 11/30/23 -

12/28/23

+

3.75E+03

+

1.79E+02 TABLE B-4.2 TRITIUM IN STORM DRAIN WATER -

SUMMARY

Results in pCi/liter Average Activity Activity Low Activity High Number of Samples Number of Positive IDs 1.73E+03 5.07E+01 5.04E+03 12 9

RQ = Results Qualifier. If <, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE B-5.1 GROSS ALPHA IN SANITARY WASTE TREATMENT WATER Results in pCi/liter STATION 102B - SWTF Headworks Collection Period RQ Activity Error MDA 12/29/22 01/29/23

+

2.10E+00

+

7.24E-01 1.72E+00 01/29/23 02/27/23

-1.73E+00

+

1.79E+00 6.62E+00 02/27/23 03/30/23

-2.40E-01

+

2.18E+00 9.21E+00 03/30/23 05/01/23

-2.96E-01

+

4.35E-01 1.70E+00 05/01/23 06/01/23 2.52E+00

+

1.73E+00 5.82E+00 06/01/23 06/29/23 1.66E+00

+

1.18E+00 2.49E+00 06/29/23 07/31/23 7.20E-01

+

1.63E+00 6.58E+00 07/31/23 08/31/23 1.39E+00

+

2.24E+00 8.95E+00 08/31/23 09/28/23 2.78E+00

+

2.33E+00 8.30E+00 09/28/23 10/30/23

-3.42E+00

+

3.21E+00 1.15E+01 10/30/23 11/30/23 9.86E-01

+

5.17E-01 1.59E+00 11/30/23 12/28/23 1.81E+00

+

2.62E+00 9.84E+00 TABLE B-5.2 GROSS ALPHA IN SANITARY WASTE TREATMENT WATER -

SUMMARY

Results in pCi/liter Location Average Activity Activity Low Activity High Number of Samples Number of Positive IDs ST-102B 6.91E-01

-3.42E+00 2.78E+00 12 1

TABLE B-6.1 GROSS BETA IN SANITARY WASTE TREATMENT WATER Results in pCi/liter STATION 102B - SWTF Headworks Collection Period RQ Activity Error MDA 12/29/22 01/29/23

+

1.61E+01

+

1.58E+00 2.74E+00 01/29/23 02/27/23

+

1.18E+01

+

1.33E+00 2.78E+00 02/27/23 03/30/23

+

1.40E+01

+

1.38E+00 2.43E+00 03/30/23 05/01/23

+

1.27E+01

+

1.20E+00 2.29E+00 05/01/23 06/01/23

+

3.51E+01

+

2.29E+00 3.08E+00 06/01/23 06/29/23

+

2.01E+01

+

1.73E+00 3.08E+00 06/29/23 07/31/23

+

1.28E+01

+

1.37E+00 2.75E+00 07/31/23 08/31/23

+

1.63E+01

+

1.55E+00 2.80E+00 08/31/23 09/28/23

+

1.69E+01

+

1.58E+00 2.86E+00 09/28/23 10/30/23

+

1.39E+01

+

1.43E+00 2.75E+00 10/30/23 11/30/23

+

1.55E+01

+

1.25E+00 1.88E+00 11/30/23 12/28/23

+

2.82E+01

+

2.01E+00 2.80E+00 TABLE B-6.2 GROSS BETA IN SANITARY WASTE TREATMENT WATER -

SUMMARY

Results in pCi/liter Location Average Activity Activity Low Activity High Number of Samples Number of Positive IDs ST-102B 1.78E+01 1.18E+01 3.51E+01 12 12 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

Table B-7.1 GAMMA SPECTROMETRY RESULTS OF SANITARY WASTE TREATMENT WATER STATION 102B Results in pCi/liter, corrected for decay during collection period Location ST-102b collected 2/2/2023 Location ST-102b collected 3/2/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.55E+01 +

6.29E+01 8.91E+01 K-40

-3.04E+00 +

6.45E+01 9.10E+01 CR-51 1.79E+01 +

3.75E+01 5.24E+01 CR-51

-2.32E+01 +

4.25E+01 5.90E+01 MN-54

-2.66E+00 +

4.70E+00 6.20E+00 MN-54

-1.67E+00 +

4.65E+00 6.21E+00 CO-58 1.11E+00 +

4.30E+00 5.80E+00 CO-58 2.25E+00 +

3.56E+00 4.71E+00 FE-59 3.80E+00 +

1.07E+01 1.39E+01 FE-59 9.40E-01

+

1.09E+01 1.44E+01 CO-60 9.48E-01

+

3.91E+00 5.16E+00 CO-60

-6.46E-01 +

5.24E+00 6.80E+00 ZN-65

-8.24E-01 +

9.53E+00 1.27E+01 ZN-65

-6.77E+00 +

1.09E+01 1.40E+01 ZRNB-95

-6.87E-01 +

8.62E+00 1.17E+01 ZRNB-95

-3.08E+00 +

8.60E+00 1.15E+01 I-131 9.21E-01

+

5.50E+00 7.81E+00 I-131 2.95E+00 +

6.88E+00 9.63E+00 CS-134 1.78E+00 +

3.64E+00 4.98E+00 CS-134

-2.80E+00 +

4.67E+00 6.29E+00 CS-137

-2.75E+00 +

5.13E+00 6.96E+00 CS-137

-2.64E+00 +

4.80E+00 6.51E+00 BALA140

-1.43E+00 +

7.72E+00 9.78E+00 BALA140

-8.29E-01 +

8.56E+00 1.09E+01 BI-214

-1.37E+01 +

9.64E+00 1.48E+01 BI-214

+

1.55E+01 +

1.06E+01 1.44E+01 Location ST-102b collected 4/3/2023 Location ST-102b collected 5/1/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 6.86E+00 +

4.11E+01 5.81E+01 K-40 5.71E+01 +

6.47E+01 8.75E+01 CR-51

-1.08E+01 +

2.54E+01 3.52E+01 CR-51 2.10E+00 +

3.58E+01 5.08E+01 MN-54 1.38E+00 +

2.84E+00 3.73E+00 MN-54

-7.78E-01 +

4.32E+00 5.84E+00 CO-58 1.48E+00 +

2.67E+00 3.50E+00 CO-58 1.49E+00 +

4.03E+00 5.40E+00 FE-59 3.05E+00 +

6.84E+00 8.63E+00 FE-59 3.24E+00 +

1.21E+01 1.56E+01 CO-60

-9.48E-02 +

3.10E+00 4.01E+00 CO-60

-2.09E+00 +

5.51E+00 7.01E+00 ZN-65 1.66E+00 +

5.38E+00 7.01E+00 ZN-65 1.91E+00 +

8.34E+00 1.11E+01 ZRNB-95 2.94E-01

+

4.77E+00 6.41E+00 ZRNB-95 6.07E+00 +

6.34E+00 8.17E+00 I-131

-6.99E-01 +

2.86E+00 4.01E+00 I-131 8.21E-01

+

5.31E+00 7.53E+00 CS-134

-1.90E+00 +

3.14E+00 4.21E+00 CS-134 2.78E+00 +

3.57E+00 4.78E+00 CS-137 2.31E+00 +

3.26E+00 4.37E+00 CS-137 1.06E+00 +

4.14E+00 5.75E+00 BALA140

-9.47E-01 +

3.93E+00 4.89E+00 BALA140

-1.09E-01 +

7.58E+00 9.68E+00 BI-214 9.64E-01

+

7.26E+00 1.04E+01 BI-214

-1.02E+01 +

1.08E+01 1.62E+01 Location ST-102b collected 6/1/2023 Location ST-102b collected 6/29/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

8.30E+01 +

4.11E+01 5.02E+01 K-40

-1.48E+01 +

6.21E+01 8.93E+01 CR-51 9.68E-01

+

2.64E+01 3.75E+01 CR-51

-5.91E-01 +

3.67E+01 5.22E+01 MN-54

-7.25E-01 +

3.01E+00 4.05E+00 MN-54

-1.35E-01 +

4.39E+00 5.98E+00 CO-58

-9.46E-01 +

3.13E+00 4.20E+00 CO-58

-6.62E-01 +

4.43E+00 6.00E+00 FE-59

-4.21E+00 +

9.31E+00 1.18E+01 FE-59

-9.71E+00 +

1.46E+01 1.82E+01 CO-60

-1.31E+00 +

3.78E+00 4.71E+00 CO-60

-9.50E-01 +

5.44E+00 7.02E+00 ZN-65

-1.75E+00 +

7.07E+00 9.04E+00 ZN-65 1.85E+00 +

7.73E+00 1.03E+01 ZRNB-95 2.66E+00 +

4.84E+00 6.42E+00 ZRNB-95

-1.00E+00 +

7.18E+00 9.77E+00 I-131 9.21E-02

+

3.90E+00 5.58E+00 I-131 2.62E+00 +

6.18E+00 8.67E+00 CS-134

-3.79E-01 +

3.29E+00 4.53E+00 CS-134

-2.77E+00 +

4.62E+00 6.23E+00 CS-137

-7.42E-01 +

3.62E+00 4.99E+00 CS-137 0.00E+00 +

1.73E+00 6.09E+00 BALA140 1.74E+00 +

4.59E+00 5.63E+00 BALA140 1.47E+00 +

7.18E+00 9.15E+00 BI-214

-1.25E+00 +

8.21E+00 1.18E+01 BI-214 1.27E+01 +

9.77E+00 1.35E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 2

Table B-7.1 GAMMA SPECTROMETRY RESULTS OF SANITARY WASTE TREATMENT WATER STATION 102B Results in pCi/liter, corrected for decay during collection period Location ST-102b collected 7/31/2023 Location ST-102b collected 8/31/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.71E+01 +

5.57E+01 7.98E+01 K-40 3.69E+01 +

5.69E+01 8.06E+01 CR-51

-2.36E+00 +

3.83E+01 5.42E+01 CR-51

-4.69E-01 +

4.04E+01 5.74E+01 MN-54

-2.38E+00 +

4.82E+00 6.38E+00 MN-54

-7.10E-01 +

4.57E+00 6.18E+00 CO-58 1.37E+00 +

3.91E+00 5.26E+00 CO-58 1.70E+00 +

4.14E+00 5.54E+00 FE-59 3.22E+00 +

9.55E+00 1.24E+01 FE-59

-2.90E-01 +

1.17E+01 1.55E+01 CO-60 1.94E+00 +

4.10E+00 5.26E+00 CO-60

-7.68E-01 +

4.50E+00 5.89E+00 ZN-65

-4.86E+00 +

9.69E+00 1.25E+01 ZN-65

-2.89E+00 +

1.03E+01 1.35E+01 ZRNB-95

-1.67E+00 +

7.04E+00 9.52E+00 ZRNB-95

-3.89E+00 +

8.84E+00 1.17E+01 I-131

-1.08E+00 +

4.77E+00 6.75E+00 I-131 1.85E+00 +

6.50E+00 9.20E+00 CS-134

-1.18E+00 +

4.03E+00 5.54E+00 CS-134

-5.43E-01 +

4.06E+00 5.62E+00 CS-137 1.85E+00 +

4.75E+00 6.51E+00 CS-137

-1.20E+00 +

4.20E+00 5.81E+00 BALA140 4.18E+00 +

4.15E+00 4.94E+00 BALA140

-5.33E+00 +

9.52E+00 1.17E+01 BI-214

+

1.30E+01 +

9.18E+00 1.27E+01 BI-214 5.04E+00 +

9.71E+00 1.39E+01 Location ST-102b collected 9/28/2023 Location ST-102b collected 10/30/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.25E+01 +

5.30E+01 5.74E+01 K-40

+

1.50E+02 +

4.66E+01 5.47E+01 CR-51

-1.08E+01 +

3.63E+01 4.89E+01 CR-51 1.10E+01 +

2.18E+01 3.17E+01 MN-54 0.00E+00 +

9.09E-01 3.79E+00 MN-54

-1.46E+00 +

4.07E+00 5.42E+00 CO-58 1.45E-01

+

2.87E+00 3.94E+00 CO-58

-1.06E+00 +

3.41E+00 4.71E+00 FE-59

-5.19E+00 +

1.32E+01 1.54E+01 FE-59

-6.99E+00 +

1.07E+01 1.37E+01 CO-60 1.47E+00 +

3.10E+00 3.44E+00 CO-60 1.66E+00 +

2.52E+00 3.47E+00 ZN-65

-1.06E+00 +

7.84E+00 9.96E+00 ZN-65

-4.60E+00 +

9.86E+00 1.65E+01 ZRNB-95 8.70E-01

+

5.52E+00 7.42E+00 ZRNB-95

-2.00E+00 +

5.90E+00 8.13E+00 I-131

-1.61E-01 +

8.97E+00 1.28E+01 I-131 3.04E-01

+

2.81E+00 4.16E+00 CS-134

-1.84E+00 +

3.93E+00 4.74E+00 CS-134

-1.39E-01 +

4.99E+00 8.45E+00 CS-137 2.88E+00 +

4.12E+00 4.05E+00 CS-137 1.60E+00 +

3.74E+00 5.11E+00 BALA140 0.00E+00 +

3.83E+00 1.02E+01 BALA140 3.23E+00 +

3.09E+00 3.74E+00 BI-214 3.57E+00 +

9.55E+00 1.25E+01 BI-214

+

3.66E+01 +

8.91E+00 1.04E+01 Location ST-102b collected 11/30/2023 Location ST-102b collected 12/28/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

+

1.00E+02 +

3.80E+01 4.90E+01 K-40

+

6.56E+01 +

7.67E+01 5.48E+01 CR-51

-2.36E+00 +

2.70E+01 3.97E+01 CR-51

-1.60E+01 +

3.33E+01 4.10E+01 MN-54

-1.11E+00 +

3.36E+00 4.49E+00 MN-54

-7.27E-01 +

3.38E+00 4.44E+00 CO-58

-8.06E-01 +

3.36E+00 4.65E+00 CO-58

-1.93E+00 +

4.25E+00 5.03E+00 FE-59 6.74E-02

+

9.59E+00 1.29E+01 FE-59 7.71E-01

+

6.18E+00 8.19E+00 CO-60 8.19E-01

+

3.32E+00 4.54E+00 CO-60

-1.46E+00 +

4.50E+00 5.29E+00 ZN-65

-1.19E+00 +

9.07E+00 1.19E+01 ZN-65

-4.76E+00 +

1.04E+01 1.56E+01 ZRNB-95

-2.27E+00 +

6.86E+00 9.40E+00 ZRNB-95

-7.97E-01 +

5.91E+00 7.91E+00 I-131 9.39E-01

+

4.49E+00 6.60E+00 I-131 1.55E+00 +

4.47E+00 5.93E+00 CS-134

-8.62E-01 +

3.21E+00 4.41E+00 CS-134 1.21E+00 +

4.97E+00 8.09E+00 CS-137 3.84E-01

+

3.60E+00 5.00E+00 CS-137 1.58E+00 +

4.12E+00 5.22E+00 BALA140

-1.10E+00 +

4.82E+00 6.33E+00 BALA140 6.11E-01

+

5.03E+00 6.24E+00 BI-214 1.10E+01 +

8.41E+00 1.14E+01 BI-214

+

3.96E+01 +

3.93E+01 1.07E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 2

TABLE B-7.2 GAMMA SPECTROMETRY RESULTS OF SANITARY WASTE TREATMENT WATER -

SUMMARY

STATION 102B Results in pCi/liter, corrected for decay during collection period Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 4.64E+01

-1.48E+01 1.50E+02 7.01E+01 12 4

CR-51

-2.89E+00

-2.32E+01 1.79E+01 4.67E+01 12 0

MN-54

-9.14E-01

-2.66E+00 1.38E+00 5.23E+00 12 0

CO-58 3.46E-01

-1.93E+00 2.25E+00 4.90E+00 12 0

FE-59

-9.42E-01

-9.71E+00 3.80E+00 1.34E+01 12 0

CO-60

-4.05E-02

-2.09E+00 1.94E+00 5.22E+00 12 0

ZN-65

-1.94E+00

-6.77E+00 1.91E+00 1.20E+01 12 0

ZRNB-95

-6.20E-01

-3.89E+00 6.07E+00 9.21E+00 12 0

I-131 8.42E-01

-1.08E+00 2.95E+00 7.39E+00 12 0

CS-134

-5.52E-01

-2.80E+00 2.78E+00 5.66E+00 12 0

CS-137 3.60E-01

-2.75E+00 2.88E+00 5.53E+00 12 0

BALA140 1.23E-01

-5.33E+00 4.18E+00 7.76E+00 12 0

BI-214 9.39E+00

-1.37E+01 3.96E+01 1.27E+01 12 4

Page 1 of 1

TABLE B-8.1 TRITIUM IN SANITARY WASTE TREATMENT WATER Results in pCi/liter, MDA for all samples is 300 pCi/liter Station Description Collection Period RQ Activity Error 102B SWTF Headworks 12/29/22 01/29/23 6.93E+01

+

9.05E+01 01/29/23 02/27/23 3.89E+01

+

1.01E+02 02/27/23 03/30/23 8.90E+01

+

9.45E+01 03/30/23 05/01/23 4.50E+01

+

9.77E+01 05/01/23 06/01/23 1.66E+02

+

1.02E+02 06/01/23 06/29/23 1.27E+02

+

9.88E+01 06/29/23 07/31/23 3.10E+01

+

1.08E+02 07/31/23 08/31/23 2.08E+02

+

9.97E+01 08/31/23 09/28/23 2.13E+02

+

1.01E+02 09/28/23 10/30/23 2.53E+01

+

1.08E+02 10/30/23 11/30/23 8.05E+01

+

1.04E+02 11/30/23 12/28/23 1.99E+02

+

1.01E+02 TABLE B-8.2 TRITIUM IN SANITARY WASTE TREATMENT WATER -

SUMMARY

Results in pCi/liter Station Description Average Activity Activity Low Activity High Number of Samples Number of Positive IDs 102B SWTF Headworks 1.08E+02 2.53E+01 2.13E+02 12 0

RQ = Results Qualifier. If blank, results is leass than dectection limit. If "+", result is above the detection limit.

Page 1 of 1

Nuclide RQ Activity Error MDA BE-7

+

2.47E+03

+

1.79E+02 9.56E+01 K-40

+

3.17E+03

+

2.77E+02 1.11E+02 CR-51

-5.42E+01

+

9.90E+01 1.38E+02 MN-54 4.96E+00

+

1.02E+01 1.36E+01 CO-58

-1.47E+00

+

1.05E+01 1.43E+01 FE-59

-8.56E+00

+

3.22E+01 4.14E+01 CO-60 2.48E+00

+

1.17E+01 1.52E+01 ZN-65

-1.78E+01

+

3.56E+01 5.95E+01 ZRNB-95 1.73E+01

+

1.74E+01 2.24E+01 CS-134

-4.58E+00

+

1.81E+01 3.04E+01 CS-137

+

3.68E+01

+

1.13E+01 1.21E+01 BALA140

-6.73E+00

+

1.69E+01 2.12E+01 BI-214

+

2.30E+02

+

2.78E+01 2.02E+01 TABLE B-9.1 GAMMA SPECTROMETRY RESULTS OF CGS POST DISPOSAL COOLING TOWER SEDIMENT RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Results in pCi/kilogram dry material

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING WELL SAMPLES Results in pCi per liter Station MW-5 collected 1/24/2023 Station MW-11 collected 1/25/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-1.39E+01 + 4.97E+01 6.77E+01 K-40 3.82E+01 +

4.53E+01 5.99E+01 MN-54 1.57E+00 + 3.48E+00 4.60E+00 MN-54 7.11E-01

+

3.48E+00 4.67E+00 CO-58

-1.20E+00 + 3.61E+00 4.82E+00 CO-58

-9.35E-01 +

3.95E+00 5.27E+00 FE-59 1.83E+00 + 9.07E+00 1.17E+01 FE-59 9.06E-01

+

8.26E+00 1.08E+01 CO-60 2.57E-01

+ 3.85E+00 4.86E+00 CO-60

-1.28E+00 +

3.91E+00 4.86E+00 ZN-65

-4.09E-01 + 1.04E+01 1.78E+01 ZN-65

-3.40E+00 +

1.09E+01 1.84E+01 ZRNB-95

-4.45E-01 + 6.41E+00 8.65E+00 ZRNB-95 7.81E-01

+

5.78E+00 7.82E+00 I-131 4.82E+00 + 5.61E+00 7.71E+00 I-131

-1.14E+00 +

5.81E+00 8.21E+00 CS-134 4.26E-01

+ 6.52E+00 1.09E+01 CS-134

-3.19E-01 +

6.73E+00 1.13E+01 CS-137 1.50E+00 + 3.77E+00 5.14E+00 CS-137

-1.86E-01 +

4.14E+00 5.72E+00 BALA140

-9.44E-01 + 6.41E+00 7.94E+00 BALA140

-2.28E-01 +

6.92E+00 8.56E+00 BI-214

+

1.00E+02 + 1.11E+01 1.03E+01 BI-214

+

1.04E+02 +

1.13E+01 1.04E+01 Station MW-3 collected 1/24/2023 Station MW-12 collected 1/25/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.56E+01 + 4.73E+01 6.81E+01 K-40

+

1.08E+02 +

7.21E+01 9.21E+01 MN-54

-7.70E-01 + 4.79E+00 6.42E+00 MN-54

-2.89E-01 +

5.95E+00 7.72E+00 CO-58

-2.41E-02 + 3.59E+00 4.92E+00 CO-58

-2.58E+00 +

6.82E+00 8.71E+00 FE-59

-3.99E-01 + 1.13E+01 1.47E+01 FE-59

-2.25E+00 +

1.53E+01 1.90E+01 CO-60

-1.16E+00 + 5.36E+00 6.86E+00 CO-60

-2.84E-01 +

5.59E+00 7.00E+00 ZN-65

-4.01E+00 + 1.28E+01 2.16E+01 ZN-65 1.13E+00 +

1.66E+01 2.81E+01 ZRNB-95 4.40E+00 + 7.52E+00 9.89E+00 ZRNB-95 6.33E+00 +

1.01E+01 1.32E+01 I-131

-1.21E+00 + 4.89E+00 6.89E+00 I-131

-1.36E+00 +

9.28E+00 1.30E+01 CS-134 1.63E+00 + 7.29E+00 1.22E+01 CS-134

-4.16E+00 +

1.12E+01 1.86E+01 CS-137

-1.19E-01 + 4.18E+00 5.85E+00 CS-137

-4.78E+00 +

7.76E+00 1.01E+01 BALA140

-5.21E+00 + 7.51E+00 9.10E+00 BALA140 4.18E+00 +

7.72E+00 9.23E+00 BI-214

+

9.99E+01 + 1.29E+01 1.22E+01 BI-214

+

1.75E+02 +

1.94E+01 1.91E+01 Station MW-9 collected 1/25/2023 Station MW-13 collected 1/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.54E+01 + 4.46E+01 5.99E+01 K-40 2.20E+01 +

4.10E+01 5.61E+01 MN-54 1.49E-01

+ 3.16E+00 4.30E+00 MN-54

-2.28E+00 +

4.05E+00 5.31E+00 CO-58

-7.71E-01 + 3.47E+00 4.66E+00 CO-58

-4.87E-01 +

3.50E+00 4.71E+00 FE-59

-2.55E-01 + 9.87E+00 1.28E+01 FE-59

-3.24E-01 +

9.18E+00 1.20E+01 CO-60

-1.18E+00 + 4.38E+00 5.43E+00 CO-60 1.51E+00 +

2.38E+00 2.96E+00 ZN-65

-1.92E+00 + 1.16E+01 1.95E+01 ZN-65

-5.38E+00 +

1.15E+01 1.91E+01 ZRNB-95

-2.95E+00 + 7.29E+00 9.63E+00 ZRNB-95 6.80E-02

+

5.85E+00 7.95E+00 I-131 4.05E+00 + 5.04E+00 6.94E+00 I-131

-1.17E+00 +

5.98E+00 8.44E+00 CS-134

-1.78E+00 + 7.33E+00 1.22E+01 CS-134

-2.00E+00 +

6.53E+00 1.09E+01 CS-137

-2.70E+00 + 4.52E+00 6.08E+00 CS-137

-7.42E-01 +

3.70E+00 5.10E+00 BALA140

-4.29E-01 + 6.05E+00 7.50E+00 BALA140 3.70E+00 +

5.54E+00 6.63E+00 BI-214

+

1.30E+02 + 1.21E+01 1.01E+01 BI-214

+

9.61E+01 +

1.13E+01 1.05E+01 Station MW-10 collected 1/25/2023 Station MW-14 collected 1/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.37E+01 + 6.38E+01 8.93E+01 K-40

-2.06E+01 +

6.17E+01 8.93E+01 MN-54

-2.13E+00 + 4.83E+00 6.41E+00 MN-54

-2.43E+00 +

4.94E+00 6.53E+00 CO-58

-1.54E+00 + 4.66E+00 6.24E+00 CO-58

-9.74E-01 +

5.01E+00 6.73E+00 FE-59

-4.65E+00 + 1.35E+01 1.72E+01 FE-59 6.69E+00 +

1.04E+01 1.31E+01 CO-60

-1.82E+00 + 5.67E+00 7.23E+00 CO-60

-3.80E-01 +

5.40E+00 7.02E+00 ZN-65

-5.26E+00 + 1.36E+01 2.28E+01 ZN-65

-6.31E+00 +

1.27E+01 2.12E+01 ZRNB-95 6.83E+00 + 7.72E+00 9.99E+00 ZRNB-95 2.75E+00 +

7.69E+00 1.03E+01 I-131 3.20E+00 + 6.52E+00 9.11E+00 I-131 1.94E+00 +

6.64E+00 9.36E+00 CS-134 2.14E+00 + 7.54E+00 1.26E+01 CS-134

-2.39E+00 +

6.27E+00 1.05E+01 CS-137 2.43E-01

+ 4.47E+00 6.26E+00 CS-137

-1.32E-01 +

5.39E+00 7.48E+00 BALA140 3.37E+00 + 6.97E+00 8.70E+00 BALA140

-1.22E+00 +

8.28E+00 1.05E+01 BI-214

+

9.47E+01 + 1.37E+01 1.30E+01 BI-214

+

4.21E+01 +

1.10E+01 1.25E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 4

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING WELL SAMPLES Results in pCi per liter Station MW-3 collected 4/25/2023 Station MW-11 collected 4/26/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.92E+01 + 6.02E+01 8.37E+01 K-40 3.44E+00 +

5.97E+01 8.56E+01 MN-54 1.39E+00 + 4.25E+00 5.70E+00 MN-54

-1.43E+00 +

4.73E+00 6.33E+00 CO-58

-8.49E-01 + 4.53E+00 6.10E+00 CO-58 3.40E+00 +

3.69E+00 4.76E+00 FE-59 3.50E+00 + 1.04E+01 1.34E+01 FE-59 6.42E+00 +

9.88E+00 1.25E+01 CO-60

-4.58E+00 + 6.76E+00 8.38E+00 CO-60 6.08E-01

+

5.05E+00 6.58E+00 ZN-65 1.37E+00 + 1.53E+01 2.59E+01 ZN-65

-4.33E+00 +

1.20E+01 2.03E+01 ZRNB-95

-9.15E-02 + 7.73E+00 1.05E+01 ZRNB-95

-8.29E-01 +

8.28E+00 1.12E+01 I-131

-7.93E-01 + 5.23E+00 7.38E+00 I-131

-4.50E-01 +

8.01E+00 1.14E+01 CS-134 3.21E+00 + 9.37E+00 1.56E+01 CS-134

-1.77E+00 +

6.77E+00 1.13E+01 CS-137

-2.37E+00 + 5.39E+00 7.34E+00 CS-137 1.19E+00 +

4.26E+00 5.89E+00 BALA140 4.92E-01

+ 7.37E+00 9.33E+00 BALA140

-5.56E+00 +

9.80E+00 1.20E+01 BI-214

+

1.61E+02 + 1.69E+01 1.47E+01 BI-214

+

5.71E+01 +

1.01E+01 1.14E+01 Station MW-5 collected 4/25/2023 Station MW-12 collected 4/26/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.51E+00 + 5.98E+01 8.28E+01 K-40 5.72E+00 +

6.16E+01 8.75E+01 MN-54 1.71E+00 + 4.20E+00 5.57E+00 MN-54

-4.60E-01 +

5.00E+00 6.75E+00 CO-58

-3.07E+00 + 4.91E+00 6.41E+00 CO-58

-2.31E+00 +

5.30E+00 7.02E+00 FE-59 2.34E+00 + 1.14E+01 1.46E+01 FE-59

-1.92E+00 +

1.37E+01 1.77E+01 CO-60

-5.47E-01 + 4.47E+00 5.78E+00 CO-60 3.09E+00 +

4.65E+00 5.83E+00 ZN-65 2.36E+00 + 1.32E+01 2.23E+01 ZN-65

-3.40E+00 +

1.29E+01 2.18E+01 ZRNB-95 5.36E+00 + 6.33E+00 8.20E+00 ZRNB-95 5.86E-01

+

8.43E+00 1.14E+01 I-131 2.11E+00 + 4.75E+00 6.63E+00 I-131

-5.00E+00 +

8.89E+00 1.24E+01 CS-134 1.39E+00 + 7.72E+00 1.29E+01 CS-134

-4.73E-01 +

7.31E+00 1.23E+01 CS-137 1.37E+00 + 5.03E+00 6.87E+00 CS-137

-1.06E+00 +

5.15E+00 7.10E+00 BALA140

-1.20E+00 + 6.45E+00 8.08E+00 BALA140 1.57E+00 +

7.58E+00 9.70E+00 BI-214

+

1.33E+02 + 1.35E+01 1.18E+01 BI-214

+

7.63E+01 +

1.28E+01 1.34E+01 Station MW-9 collected 4/26/2023 Station MW-13 collected 4/25/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-2.48E+01 + 6.06E+01 8.52E+01 K-40

-2.70E+01 +

7.40E+01 1.02E+02 MN-54

-1.07E-01 + 4.12E+00 5.57E+00 MN-54

-3.53E+00 +

5.60E+00 7.32E+00 CO-58

-2.27E+00 + 4.57E+00 6.01E+00 CO-58 4.40E-01

+

3.39E+00 4.66E+00 FE-59

-7.96E+00 + 1.32E+01 1.64E+01 FE-59

-1.50E+00 +

1.41E+01 1.82E+01 CO-60 1.73E+00 + 4.55E+00 5.78E+00 CO-60 1.71E+00 +

4.31E+00 5.55E+00 ZN-65

-5.72E+00 + 1.37E+01 2.29E+01 ZN-65

-7.31E+00 +

1.65E+01 2.76E+01 ZRNB-95 3.81E+00 + 7.01E+00 9.23E+00 ZRNB-95 1.93E+00 +

8.69E+00 1.16E+01 I-131

-9.53E-01 + 4.98E+00 6.99E+00 I-131

-3.52E+00 +

6.24E+00 8.66E+00 CS-134

-1.23E+00 + 8.26E+00 1.38E+01 CS-134

-2.16E+00 +

1.05E+01 1.75E+01 CS-137

-5.28E-01 + 4.45E+00 6.15E+00 CS-137 5.28E-01

+

5.68E+00 7.84E+00 BALA140

-1.34E+00 + 6.91E+00 8.62E+00 BALA140 2.28E+00 +

6.35E+00 7.96E+00 BI-214

+

1.48E+02 + 1.40E+01 1.20E+01 BI-214

+

2.00E+02 +

1.72E+01 1.34E+01 Station MW-10 collected 4/26/2023 Station MW-14 collected 4/25/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-3.74E+01 + 6.41E+01 9.28E+01 K-40 3.47E+01 +

5.62E+01 7.98E+01 MN-54 5.39E-01

+ 4.42E+00 5.99E+00 MN-54

-2.57E+00 +

5.35E+00 7.05E+00 CO-58 2.36E+00 + 4.19E+00 5.55E+00 CO-58

-2.11E+00 +

5.18E+00 6.86E+00 FE-59 4.88E+00 + 1.18E+01 1.50E+01 FE-59

-3.01E+00 +

1.39E+01 1.78E+01 CO-60

-4.56E-01 + 5.22E+00 6.80E+00 CO-60

-2.66E+00 +

6.36E+00 8.02E+00 ZN-65

-6.87E+00 + 1.27E+01 2.12E+01 ZN-65

-4.40E+00 +

1.64E+01 2.77E+01 ZRNB-95

-3.37E+00 + 8.74E+00 1.16E+01 ZRNB-95 1.11E+00 +

8.41E+00 1.13E+01 I-131

-3.16E+00 + 7.89E+00 1.10E+01 I-131

-2.14E+00 +

5.92E+00 8.27E+00 CS-134 4.94E-01

+ 6.24E+00 1.05E+01 CS-134

-2.76E+00 +

9.78E+00 1.63E+01 CS-137

-2.64E+00 + 5.02E+00 6.81E+00 CS-137 2.64E-01

+

5.41E+00 7.50E+00 BALA140 1.33E+00 + 6.10E+00 7.89E+00 BALA140 1.80E+00 +

6.42E+00 8.10E+00 BI-214

+

4.71E+01 + 1.12E+01 1.25E+01 BI-214

+

1.71E+02 +

1.59E+01 1.28E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 2 of 4

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING WELL SAMPLES Results in pCi per liter Station MW-5 collected 7/25/2023 Station MW-13 collected 7/25/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-1.71E+01 + 6.02E+01 8.75E+01 K-40 4.06E+01 +

8.09E+01 9.64E+01 MN-54 5.67E-01

+ 3.86E+00 5.27E+00 MN-54 2.44E+00 +

6.24E+00 7.78E+00 CO-58 5.00E-01

+ 4.27E+00 5.80E+00 CO-58

-4.90E-01 +

5.85E+00 8.03E+00 FE-59 6.30E+00 + 9.70E+00 1.23E+01 FE-59 4.32E-01

+

1.58E+01 2.10E+01 CO-60

-2.28E-01 + 4.82E+00 6.33E+00 CO-60 3.08E-01

+

5.34E+00 7.08E+00 ZN-65 1.06E+00 + 1.11E+01 1.90E+01 ZN-65 5.81E+00 +

1.94E+01 3.15E+01 ZRNB-95

-7.22E-01 + 7.86E+00 1.07E+01 ZRNB-95 3.01E+00 +

9.08E+00 1.17E+01 I-131

-3.94E+00 + 7.94E+00 1.11E+01 I-131 7.45E-02

+

6.46E+00 9.33E+00 CS-134

-1.71E+00 + 7.20E+00 1.21E+01 CS-134

-3.84E+00 +

1.39E+01 2.24E+01 CS-137 1.06E+00 + 4.66E+00 6.45E+00 CS-137

-3.56E+00 +

7.49E+00 9.09E+00 BALA140

-3.11E+00 + 8.35E+00 1.04E+01 BALA140 2.50E+00 +

7.46E+00 8.91E+00 BI-214

+

7.15E+01 + 1.22E+01 1.24E+01 BI-214

+

2.00E+02 +

1.94E+02 2.07E+01 Station MW-10 collected 7/26/2023 Station MW-14 collected 7/25/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.01E+00 + 6.35E+01 8.93E+01 K-40 1.71E+01 +

6.23E+01 8.75E+01 MN-54 1.48E+00 + 4.02E+00 5.39E+00 MN-54

-1.39E+00 +

5.70E+00 7.59E+00 CO-58

-2.76E-02 + 4.11E+00 5.64E+00 CO-58 2.32E+00 +

5.11E+00 6.76E+00 FE-59

-1.49E+00 + 1.19E+01 1.55E+01 FE-59

-3.09E+00 +

1.46E+01 1.87E+01 CO-60

-2.17E+00 + 5.34E+00 6.80E+00 CO-60 1.18E+00 +

5.08E+00 6.56E+00 ZN-65

-4.60E+00 + 1.20E+01 2.03E+01 ZN-65

-7.87E-01 +

1.82E+01 3.08E+01 ZRNB-95 2.43E+00 + 7.75E+00 1.04E+01 ZRNB-95 9.68E-01

+

8.79E+00 1.18E+01 I-131

-4.34E+00 + 7.71E+00 1.07E+01 I-131

-3.66E+00 +

6.48E+00 8.99E+00 CS-134

-2.25E+00 + 6.53E+00 1.09E+01 CS-134

-1.32E+00 +

1.15E+01 1.92E+01 CS-137

-2.38E+00 + 4.96E+00 6.75E+00 CS-137 1.06E+00 +

6.92E+00 9.46E+00 BALA140

-1.53E+00 + 7.55E+00 9.59E+00 BALA140 4.09E-01

+

7.13E+00 9.07E+00 BI-214

+

4.77E+01 + 1.01E+01 1.17E+01 BI-214

+

2.69E+02 +

1.96E+01 1.31E+01 Station MW-11 collected 7/26/2023 Station MW-5 collected 10/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-4.04E+01 + 6.56E+01 9.44E+01 K-40 2.44E+01 +

5.27E+01 7.28E+01 MN-54

-2.46E+00 + 5.39E+00 7.11E+00 MN-54 3.35E+00 +

3.64E+00 4.70E+00 CO-58 8.89E-01

+ 4.38E+00 5.93E+00 CO-58 8.80E-01

+

3.54E+00 4.73E+00 FE-59

-1.13E+00 + 1.29E+01 1.68E+01 FE-59 6.29E+00 +

1.07E+01 1.33E+01 CO-60 2.59E+00 + 3.93E+00 4.96E+00 CO-60 1.07E-01

+

4.04E+00 5.24E+00 ZN-65 4.98E+00 + 1.15E+01 1.94E+01 ZN-65

-6.01E+00 +

1.45E+01 2.43E+01 ZRNB-95 2.94E+00 + 7.84E+00 1.05E+01 ZRNB-95

-1.10E+00 +

7.01E+00 9.36E+00 I-131 1.22E+00 + 7.07E+00 9.99E+00 I-131

-2.19E+00 +

4.72E+00 6.55E+00 CS-134

-2.49E+00 + 7.99E+00 1.33E+01 CS-134 2.49E+00 +

7.92E+00 1.32E+01 CS-137

-2.38E+00 + 5.19E+00 7.07E+00 CS-137

-2.51E+00 +

4.82E+00 6.50E+00 BALA140 2.29E+00 + 6.23E+00 7.93E+00 BALA140 2.46E+00 +

5.50E+00 6.77E+00 BI-214

+

9.43E+01 + 1.29E+01 1.25E+01 BI-214

+

1.67E+02 +

1.37E+01 1.11E+01 Station MW-12 collected 7/26/2023 Station MW-10 collected 10/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-3.62E+01 + 6.75E+01 9.61E+01 K-40

-5.71E+00 +

6.09E+01 8.75E+01 MN-54 3.78E-01

+ 4.05E+00 5.52E+00 MN-54

-2.17E+00 +

5.32E+00 7.05E+00 CO-58 1.14E+00 + 4.50E+00 6.06E+00 CO-58

-1.81E+00 +

4.69E+00 6.24E+00 FE-59 3.96E+00 + 1.17E+01 1.51E+01 FE-59 5.55E+00 +

1.24E+01 1.58E+01 CO-60 3.80E-01

+ 5.40E+00 7.02E+00 CO-60

-2.13E+00 +

5.85E+00 7.43E+00 ZN-65

-6.88E+00 + 1.48E+01 2.48E+01 ZN-65

-5.47E+00 +

1.50E+01 2.52E+01 ZRNB-95 2.27E+00 + 7.67E+00 1.03E+01 ZRNB-95

-2.35E+00 +

8.46E+00 1.13E+01 I-131 1.43E+00 + 7.54E+00 1.06E+01 I-131 2.90E+00 +

4.89E+00 6.79E+00 CS-134

-1.77E+00 + 7.92E+00 1.33E+01 CS-134

-1.98E+00 +

9.18E+00 1.53E+01 CS-137 1.85E+00 + 4.40E+00 6.03E+00 CS-137

-3.03E+00 +

5.94E+00 8.04E+00 BALA140

-3.10E+00 + 8.83E+00 1.10E+01 BALA140

-3.80E+00 +

7.81E+00 9.61E+00 BI-214

+

9.34E+01 + 1.25E+01 1.21E+01 BI-214

+

1.43E+02 +

1.59E+01 1.41E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 3 of 4

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING WELL SAMPLES Results in pCi per liter Station MW-11 collected 10/24/2023 Station MW-12 collected 10/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.17E+01 + 5.72E+01 8.18E+01 K-40 1.56E+01

+

4.86E+01 6.22E+01 MN-54

-1.11E+00 + 4.54E+00 6.10E+00 MN-54

-1.98E+00

+

3.98E+00 4.60E+00 CO-58 2.09E+00 + 4.08E+00 5.43E+00 CO-58

-9.72E-01

+

3.64E+00 4.70E+00 FE-59 3.29E+00 + 1.11E+01 1.44E+01 FE-59

-2.32E+00

+

1.01E+01 1.26E+01 CO-60 4.56E-01

+ 5.58E+00 7.24E+00 CO-60 1.41E+00

+

3.91E+00 4.55E+00 ZN-65

-2.32E-01 + 1.24E+01 2.13E+01 ZN-65 2.88E+00

+

1.03E+01 1.68E+01 ZRNB-95 1.83E+00 + 7.47E+00 1.01E+01 ZRNB-95

-1.05E+00

+

6.27E+00 8.32E+00 I-131 2.14E+00 + 7.70E+00 1.08E+01 I-131 2.31E+00

+

5.87E+00 7.61E+00 CS-134

-2.50E+00 + 7.58E+00 1.27E+01 CS-134

-1.98E+00

+

6.78E+00 1.08E+01 CS-137 6.60E-01

+ 4.87E+00 6.75E+00 CS-137 2.13E+00

+

4.34E+00 5.18E+00 BALA140 1.02E+00 + 8.25E+00 1.05E+01 BALA140

-6.05E+00

+

1.06E+01 1.04E+01 BI-214

+

8.87E+01 + 1.26E+01 1.18E+01 BI-214

+

1.06E+02

+

1.02E+02 1.09E+01 Station MW-13 collected 10/24/2023 Station MW-14 collected 10/24/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 6.99E+01

+ 7.63E+01 1.03E+02 K-40

-4.65E+01

+

6.19E+01 9.10E+01 MN-54

-4.47E+00 + 7.63E+00 1.00E+01 MN-54

-1.74E+00

+

4.85E+00 6.46E+00 CO-58

-1.92E+00 + 6.36E+00 8.82E+00 CO-58 7.68E-01

+

4.83E+00 6.51E+00 FE-59

-8.32E-01

+ 1.36E+01 1.87E+01 FE-59

-2.01E+00

+

1.29E+01 1.66E+01 CO-60 2.81E+00

+ 5.97E+00 8.04E+00 CO-60 2.28E+00

+

4.57E+00 5.82E+00 ZN-65

-7.65E+00 + 2.18E+01 3.66E+01 ZN-65

-7.12E+00

+

1.73E+01 2.90E+01 ZRNB-95 2.94E+00

+ 8.94E+00 1.25E+01 ZRNB-95

-2.51E+00

+

8.91E+00 1.19E+01 I-131

-1.85E+00 + 6.16E+00 9.03E+00 I-131 2.60E+00

+

5.15E+00 7.17E+00 CS-134

-2.43E-01

+ 1.33E+01 2.23E+01 CS-134

-2.82E+00

+

1.04E+01 1.74E+01 CS-137

-2.56E+00 + 7.24E+00 9.96E+00 CS-137

-3.59E+00

+

6.04E+00 8.13E+00 BALA140

-6.03E+00 + 9.84E+00 1.24E+01 BALA140 1.37E+00

+

6.88E+00 8.67E+00 BI-214

+

2.11E+02

+ 2.23E+01 1.74E+01 BI-214

+

1.98E+02

+

1.70E+01 1.26E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 4 of 4

Table B-10.2 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING WELL SAMPLES -

SUMMARY

Results in pCi/liter Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 9.18E+00

-4.65E+01 1.08E+02 8.33E+01 28 1

MN-54

-6.07E-01

-4.47E+00 3.35E+00 6.21E+00 28 0

CO-58

-3.41E-01

-3.07E+00 3.40E+00 6.00E+00 28 0

FE-59 6.88E-01

-7.96E+00 6.69E+00 1.53E+01 28 0

CO-60 5.52E-02

-4.58E+00 3.09E+00 6.29E+00 28 0

ZN-65

-2.78E+00

-7.65E+00 5.81E+00 2.35E+01 28 0

ZRNB-95 1.25E+00

-3.37E+00 6.83E+00 1.04E+01 28 0

I-131

-2.89E-01

-5.00E+00 4.82E+00 8.97E+00 28 0

CS-134

-1.08E+00

-4.16E+00 3.21E+00 1.40E+01 28 0

CS-137

-8.36E-01

-4.78E+00 2.13E+00 7.02E+00 28 0

BALA140

-3.92E-01

-6.05E+00 4.18E+00 9.11E+00 28 0

BI-214 1.26E+02 4.21E+01 2.69E+02 1.29E+01 28 28 Page 1 of 1

TABLE B-11.1 TRITIUM IN GROUNDWATER MONITORING WELL SAMPLES Results in pCi/liter Location Collection Date RQ Activity Error MW-3 01/24/23

+

1.37E+03

+

1.27E+02 04/25/23

+

1.33E+03

+

1.36E+02 Well depleted Well depleted MW-5 01/25/23

+

1.05E+04

+

2.62E+02 04/25/23

+

1.11E+04

+

2.78E+02 08/24/23

+

1.08E+04

+

2.75E+02 10/25/23

+

1.05E+04

+

2.63E+02 MW-9 01/25/23 1.88E+02

+

9.79E+01 04/25/23 1.79E+02

+

9.70E+01 Well depleted

+

Well depleted

+

MW-10 01/25/23 1.08E+02

+

9.64E+01 04/25/23 7.32E+01

+

1.02E+02 08/24/23 2.13E+02

+

1.23E+02 10/25/23 2.38E+02

+

1.00E+02 MW-11 01/25/23

-3.38E+00

+

8.77E+01 04/25/23 7.43E+01

+

1.04E+02 08/24/23 2.82E+00

+

1.46E+02 10/25/23 4.84E+01

+

9.99E+01 MW-12 01/25/23 2.26E+02

+

9.94E+01 04/25/23

+

4.13E+02

+

1.13E+02 08/24/23

+

3.45E+02

+

1.07E+02 10/25/23

+

3.87E+02

+

1.08E+02 MW-13 01/25/23

+

9.24E+03

+

2.47E+02 04/25/23

+

9.73E+03

+

2.67E+02 08/24/23

+

8.18E+03

+

2.87E+02 10/25/23

+

9.60E+03

+

2.61E+02 MW-14 01/25/23 1.67E+02

+

9.55E+01 04/25/23 2.22E+02

+

1.09E+02 08/24/23 2.31E+02

+

1.04E+02 10/25/23 2.32E+02

+

1.04E+02 RQ = Results Qualifier. If blank, results is leass than dectection limit. If "+", result is above the detection limit.

Page 1 of 1

Table B-12.1 GAMMA SPECTROMETRY RESULTS OF EVAPORATION POND WATER Results in pCi/liter Location EVAP 1A collected 5/15/2023 Location EVAP 1B collected 5/15/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40

-1.14E+00 + 5.57E+01 8.18E+01 K-40 2.05E+01 + 3.97E+01 5.48E+01 CR-51

-5.73E+00 + 4.99E+01 7.05E+01 CR-51

-9.68E-01 + 3.25E+01 4.63E+01 MN-54

-5.50E-01 + 4.50E+00 6.10E+00 MN-54

-6.09E-01 + 3.25E+00 4.38E+00 CO-58

-1.05E+00 + 5.42E+00 7.28E+00 CO-58

-3.13E-01 + 3.73E+00 5.05E+00 FE-59

-2.13E-01 + 1.46E+01 1.91E+01 FE-59 1.66E+00 + 9.98E+00 1.29E+01 CO-60

-1.14E+00 + 5.47E+00 7.04E+00 CO-60

-1.80E+00 + 3.96E+00 4.88E+00 ZN-65

-6.52E+00 + 1.16E+01 1.49E+01 ZN-65 5.55E-01

+ 6.79E+00 8.80E+00 ZRNB-95

-2.37E+00 + 8.69E+00 1.17E+01 ZRNB-95

-2.90E+00 + 6.58E+00 8.72E+00 I-131 4.08E+00 + 1.42E+01 2.00E+01 I-131

-1.18E+00 + 1.03E+01 1.47E+01 CS-134

-1.84E+00 + 4.42E+00 6.02E+00 CS-134 3.06E-01

+ 3.35E+00 4.62E+00 CS-137

-1.32E+00 + 4.86E+00 6.69E+00 CS-137 2.78E-01

+ 2.98E+00 4.17E+00 BALA140 8.45E+00 + 9.49E+00 1.14E+01 BALA140 6.68E-01

+ 7.22E+00 9.14E+00 BI-214 1.04E+01 + 1.03E+01 1.44E+01 BI-214

-4.49E-01 + 8.16E+00 1.17E+01 Location EVAP 3 collected 5/15/2023 Location EVAP 4 collected 5/15/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.97E+01 + 4.20E+01 5.74E+01 K-40 2.54E+01 + 3.88E+01 5.35E+01 CR-51

-7.99E+00 + 3.56E+01 5.02E+01 CR-51 3.38E+00 + 3.35E+01 4.75E+01 MN-54

-9.14E-01 + 3.33E+00 4.46E+00 MN-54 2.67E-01

+ 3.17E+00 4.31E+00 CO-58 3.19E+00 + 2.72E+00 3.44E+00 CO-58 3.58E-01

+ 3.64E+00 4.92E+00 FE-59 2.18E-01

+ 9.96E+00 1.30E+01 FE-59

-2.19E-01 + 8.85E+00 1.17E+01 CO-60 9.52E-01

+ 3.50E+00 4.40E+00 CO-60 1.54E+00 + 3.26E+00 4.05E+00 ZN-65

-4.40E+00 + 8.69E+00 1.09E+01 ZN-65

-5.70E+00 + 8.92E+00 1.11E+01 ZRNB-95 1.84E+00 + 5.98E+00 8.03E+00 ZRNB-95 4.06E-01

+ 5.91E+00 8.04E+00 I-131 3.49E+00 + 9.96E+00 1.40E+01 I-131 2.89E+00 + 9.26E+00 1.31E+01 CS-134

-2.40E+00 + 3.95E+00 5.30E+00 CS-134

-2.07E+00 + 3.46E+00 4.66E+00 CS-137

-4.64E-01 + 3.33E+00 4.62E+00 CS-137

-1.86E-01 + 3.38E+00 4.70E+00 BALA140 0.00E+00 + 4.40E+00 1.11E+01 BALA140

-1.39E+00 + 9.00E+00 1.12E+01 BI-214

-6.22E-01 + 8.10E+00 1.17E+01 BI-214

-5.25E-01 + 7.96E+00 1.15E+01 Location EVAP 2 collected 5/15/2023 Nuclide RQ Activity Error MDA K-40

-7.23E+00 + 5.33E+01 7.98E+01 CR-51 7.51E-01

+ 5.19E+01 7.35E+01 MN-54

-3.58E-01 + 4.31E+00 5.87E+00 CO-58

-6.66E-01 + 5.15E+00 6.97E+00 FE-59

-2.26E+00 + 1.38E+01 1.79E+01 CO-60

-1.14E-01 + 4.62E+00 6.11E+00 ZN-65

-3.26E+00 + 1.04E+01 1.37E+01 ZRNB-95

-3.44E+00 + 8.81E+00 1.17E+01 I-131 6.34E+00 + 1.37E+01 1.91E+01 CS-134 1.19E+00 + 3.69E+00 5.08E+00 CS-137 3.96E-01

+ 5.22E+00 7.24E+00 BALA140 5.54E+00 + 1.23E+01 1.54E+01 BI-214

-6.60E+00 + 9.36E+00 1.42E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE B-12.2 GAMMA SPECTROMETRY RESULTS OF EVAPORATION POND WATER -

SUMMARY

Results in pCi/liter Nuclide Average Activity Activity Low Activity High Average MDA Number of Samples Number of Positive IDs K-40 1.14E+01

-7.23E+00 2.54E+01 6.55E+01 5

0 CR-51

-2.11E+00

-7.99E+00 3.38E+00 5.76E+01 5

0 MN-54

-4.33E-01

-9.14E-01 2.67E-01 5.02E+00 5

0 CO-58 3.03E-01

-1.05E+00 3.19E+00 5.53E+00 5

0 FE-59

-1.63E-01

-2.26E+00 1.66E+00 1.49E+01 5

0 CO-60

-1.12E-01

-1.80E+00 1.54E+00 5.29E+00 5

0 ZN-65

-3.86E+00

-6.52E+00 5.55E-01 1.19E+01 5

0 ZRNB-95

-1.29E+00

-3.44E+00 1.84E+00 9.64E+00 5

0 I-131 3.12E+00

-1.18E+00 6.34E+00 1.62E+01 5

0 CS-134

-9.62E-01

-2.40E+00 1.19E+00 5.14E+00 5

0 CS-137

-2.59E-01

-1.32E+00 3.96E-01 5.48E+00 5

0 BALA140 2.65E+00

-1.39E+00 8.45E+00 1.16E+01 5

0 BI-214 4.52E-01

-6.60E+00 1.04E+01 1.27E+01 5

0 Page 1 of 1

TABLE B-13.1 GAMMA SPECTROMETRY RESULTS OF CGS EVAPORATION POND SEDIMENT Results in pCi/kilogram dry material Location & Date EVAP 3 9/11/2023 Location & Date EVAP-4 9/14/2023 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7

+

1.81E+03 +

5.22E+02 5.03E+02 BE-7

+

3.79E+03 +

3.75E+03 7.78E+02 K-40

+

1.01E+04 +

1.39E+03 7.98E+02 K-40

+

6.03E+03 +

5.90E+03 9.34E+02 CR-51

-1.53E+02 +

6.79E+02 9.70E+02 CR-51 3.82E+02 +

7.14E+02 8.57E+02 MN-54

-6.72E+00 +

6.65E+01 9.28E+01 MN-54 1.89E+01 +

7.97E+01 1.03E+02 CO-58 3.05E+01 +

5.81E+01 7.88E+01 CO-58 4.09E+01 +

9.08E+01 1.06E+02 FE-59

-1.05E+02 +

2.10E+02 2.69E+02 FE-59

-2.15E+02 +

3.81E+02 3.87E+02 CO-60 3.61E+01 +

6.76E+01 8.55E+01 CO-60

+

2.30E+02 +

2.28E+02 2.86E+01 ZN-65

-9.39E+01 +

1.80E+02 3.03E+02 ZN-65

-5.41E+01 +

1.94E+02 2.40E+02 ZRNB-95 3.00E+01 +

1.05E+02 1.46E+02 ZRNB-95 4.28E+00 +

1.39E+02 1.93E+02 CS-134

-1.79E+01 +

9.14E+01 1.56E+02 CS-134

-6.18E+01 +

1.21E+02 1.38E+02 CS-137 5.28E+01 +

1.02E+02 1.35E+02 CS-137

-5.73E+01 +

1.17E+02 1.37E+02 BALA140

-2.14E+01 +

1.18E+02 1.52E+02 BALA140 0.00E+00 +

2.91E+01 1.62E+02 BI-214

+

4.43E+02 +

1.49E+02 1.68E+02 BI-214 2.83E+02 +

3.60E+02 3.15E+02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE B-14.1 GROSS BETA IN EVAPORATION POND WATER Results in pCi/liter Location Collection Date RQ Activity Error MDA EVAP-1A 05/15/23

+

6.30E+00

+

1.04E+00 2.36E+00 EVAP-1B 05/15/23 7.63E-01

+

6.70E-01 2.12E+00 EVAP-2 05/15/23 9.41E-01

+

6.76E-01 2.13E+00 EVAP-3 05/15/23

+

4.50E+00

+

8.98E-01 2.19E+00 EVAP-4 05/15/23

+

2.17E+01

+

1.80E+00 2.78E+00 TABLE B-15.1 TRITIUM IN EVAPORATION POND WATER Results in pCi/liter, LLD is 300 pCi/liter Location Collection Date RQ Activity Error Evaporation Pond 1A 05/15/23 1.15E+02

+

1.03E+02 Evaporation Pond 1B 05/15/23 7.10E+01

+

1.02E+02 Evaporation Pond 2 05/15/23 1.27E+02

+

1.04E+02 Evaporation Pond 3 05/15/23 2.40E+02

+

1.08E+02 Evaporation Pond 4 05/15/23

+

1.21E+03

+

1.42E+02 RQ = Results Qualifier. If <, result is less than detection limit. If "+", result is above detection limit.

Page 1 of 1

TABLE B-14.1 GROSS BETA IN EVAPORATION POND WATER Results in pCi/liter Location Collection Date RQ Activity Error MDA EVAP-1A 05/15/23

+

6.30E+00

+

1.04E+00 2.36E+00 EVAP-1B 05/15/23 7.63E-01

+

6.70E-01 2.12E+00 EVAP-2 05/15/23 9.41E-01

+

6.76E-01 2.13E+00 EVAP-3 05/15/23

+

4.50E+00

+

8.98E-01 2.19E+00 EVAP-4 05/15/23

+

2.17E+01

+

1.80E+00 2.78E+00 TABLE B-15.1 TRITIUM IN EVAPORATION POND WATER Results in pCi/liter, LLD is 300 pCi/liter Location Collection Date RQ Activity Error Evaporation Pond 1A 05/15/23 1.15E+02

+

1.03E+02 Evaporation Pond 1B 05/15/23 7.10E+01

+

1.02E+02 Evaporation Pond 2 05/15/23 1.27E+02

+

1.04E+02 Evaporation Pond 3 05/15/23 2.40E+02

+

1.08E+02 Evaporation Pond 4 05/15/23

+

1.21E+03

+

1.42E+02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

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TABLE B-16.1 TRITIUM IN SNOW Results in pCi/liter, LLD is 300 pCi/liter Location Sector Distance from CGS, miles Collection Date RQ Activity Error ST-101B ENE 0.22 No Snow No Snow

+ No Snow ST-119 S

0.31 No Snow No Snow

+ No Snow ST-155 NW 0.30 No Snow No Snow

+ No Snow ST-76 ESE 0.42 No Snow No Snow

+ No Snow ST-81 SW 0.74 No Snow No Snow

+ No Snow ST-88 WNW 0.17 No Snow No Snow

+ No Snow TABLE B-17.1 CARBON 14 IN APPLES Results in pCi/gram wet mass Location Distance from CGS, miles Sector from CGS Sample Type Collection Date RQ Activity Error MDA St-5 4.3 ESE Ind 8/12/2023 2.00E-01

+

5.80E-01 1.00E+00 St-5 7.72 ESE Ind 9/20/2023

-3.00E-01

+

5.70E-01 1.00E+00 Kennewick 20.5 ESE Cntl 8/29/2023

-5.00E-01

+

5.60E-01 1.00E+00 St-9 23.2 SW Cntl 9/19/2023

-1.40E-01

+

5.70E-01 1.00E+00 No Snow was Collected for 2023 Ind = Indicator location. Cntl = Control location.

RQ=Results Qualifier. If <, results is leass than dectection limit. If "+", result is above the detection limit.

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