GO2-20-075, Independent Spent Fuel Storage Installation - 2019 Annual Radiological Environmental Operating Report

Independent Spent Fuel Storage Installation - 2019 Annual Radiological Environmental Operating Report

ML20134J113
Person / Time
Site:	Columbia
Issue date:	05/13/2020
From:	Schuetz R Energy Northwest
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
GO2-20-075
Download: ML20134J113 (166)

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ENERGY Robert E. Schuetz Columbia Generating Station P.O. Box 968, MD PE23 NORTHWEST Richland, WA 99352-0968 Ph. 509.377.2425 reschuetz@energy-northwest.com May 13, 2020 GO2-20-075 DIC: 1316.11 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 2019 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 R.L. Phillips at (509) 377-5350.



Executed on this ________ "

day of ________, 2020.

Respectfully, Robert E. Schuetz 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)

K. Hall (WDOE) J. Temple (WDOE)

A. Kidder (ESFEC)

COLUMBIA GENERATING STATION 2019 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE COLUMBIA GENERATING STATION

ENERGY NORTHWEST COLUMBIA GENERATING STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2019 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT For Calendar Year 2019 Preparation Date: April 2020 Submitted Date: May 2020 Date: Hi It/. Zo'J.-0 Reviewed B Date: A- 13 Ruth Ch Reviewed B :

Jane LePag , ental Services Approved u{J)d~ _ Date: L/ / 13 / ID l.Q Brad Barfuss, ENW Environm~ Services Manager

TABLE OF CONTENTS 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 TLDs 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 2019 Annual Radiological Environmental Operating Report i Energy Northwest/Columbia Generating Station

TABLE OF CONTENTS 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 2019 4-8 5.0 RESULTS AND DISCUSSION 5-1 5.1 Direct Radiation 5-1 5.2 Airborne Particulate/Iodine 5-3 5.3 Water 5-5 5.3.1 Surface Water 5-5 5.3.2 Ground Water 5-6 5.4 Soil 5-7 5.5 River Sediment 5-7 5.6 Fish 5-7 5.7 Milk 5-8 5.8 Garden Produce 5-8 5.9 Special Interest Stations 5-8 5.9.1 Evaporation Pond (Station 101B) 5-8 5.9.2 Sanitary Waste Treatment Facility (Station 102B) 5-9 5.9.3 Cooling System Sediment Disposal Area (Station 119) 5-9 5.9.4 Independent Spent Fuel Storage Installation 5-11 5.9.5 Miscellaneous Environmental Sample Results 5-12 5.10 2019 Sample Deviations 5-12 2019 Annual Radiological Environmental Operating Report ii Energy Northwest/Columbia Generating Station

TABLE OF CONTENTS SECTION PAGE 6.0 QUALITY ASSURANCE AND QUALITY CONTROL 6-1 6.1 Quality Control for the Energy Northwest Environmental TLD Program 6-1 6.2 Quality Control for the Environmental Sample Program 6-1 6.2.1 Sample Collection Quality Control 6-2 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 2019 Annual Radiological Environmental Operating Report iii Energy Northwest/Columbia Generating Station

LIST OF TABLES TABLE PAGE 4-1 Radiological Environmental Monitoring Program Sampling Plan 4-9 4-2 REMP Sample Stations and Requirements 4-15 4-3 2019 Five Mile Land Use Census Results 4-19 4-4 Comparison of Laboratory Nominal Lower Limits of Detection With 4-20 Offsite Dose Calculation Manual Requirements 5-1A ODCM REMP Sample Deviations for 2019 5-12 5-1B EFSEC REMP Sample Deviations for 2019 5-13 5-1C ODCM & EFSEC REMP Sample Deviations for 2019 5-13 5-1D CGS REMP Air Sample Percent in Service Time for 2019 5-14 5-1E CGS REMP Water Sample Percent in Service Time for 2019 5-14 5-2 Radiological Environmental Monitoring Program Summary 5-15 5-3 Quarterly TLD Data Summary with Comparison to the Preoperational and 5-25 Operational Periods 6-1 2019 Environmental Spiked Dosimeter Results 6-4 6-2 ENW REMP Program Cross Check Performance Results 6-5 2019 Annual Radiological Environmental Operating Report iv Energy Northwest/Columbia Generating Station

LIST OF FIGURES FIGURE PAGE 4-1 Select REMP Sampling Locations Within 0.8 Miles of CGS 4-21 4-2 Select REMP Sampling Locations Between 0.8 and 2.8 Miles 4-22 4-3 Select REMP Sampling Locations Beyond 2.8 Miles 4-23 4-4 ISFSI TLD Station Layout 4-24 5-1 S Stations Quarterly TLDs 1984-2018 Hi/Low/Mean and 2019 Mean by 5-1 Sector 5-2 Near Plant Stations Quarterly TLDs 1984-2018 Hi/Low/Mean and 2019 Mean 5-2 by Sector 5-3 Remote Stations Quarterly TLDs 1984-2018 Hi/Low/Mean and 2019 Mean by 5-2 Sector 5-4 1985-2018 Weekly Hi/Low/Mean and 2019 Weekly Mean Gross Beta in Air- 5-3 Near Plant Stations 5-5 1985-2018 Weekly Hi/Low/Mean and 2019 Weekly Mean Gross Beta in Air- 5-4 Remote Stations 5-6 Gross Beta in River/Drinking (Stations 26 & 29) and Plant Discharge Water 5-5 (Station 27) for 2019 5-7 Tritium in River/Drinking (Stations 26 & 29) and Plant Discharge Water 5-6 (Station 27) for 2019 5-8 Cooling System Sediment Activity Levels for Disposals Made in 2019 5-10 5-9 ISFSI TLD Trend at CGS 5-11 2019 Annual Radiological Environmental Operating Report v Energy Northwest/Columbia Generating Station

1.0 EXECUTIVE

SUMMARY

1.0 EXECUTIVE

SUMMARY

The primary purpose of the Energy Northwest Radiological Environmental Monitoring Program (REMP) is to evaluate the radiological impact that Columbia Generating Station (CGS) operation may have on the environment. 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. Presented in this report are summaries and discussions of the data generated for the REMP conducted at CGS for calendar year 2019.

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, ingestion, and waterborne pathways. These four exposure pathways are summarized as follows:

Direct Radiation - 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.

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.

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.

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 and radionuclides related to CGS operation were identified at low levels in evaporation pond and cooling tower sediment. 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 2019 Annual Radiological Environmental Operating Report 1-1 Energy Northwest/Columbia Generating Station

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.

2019 Annual Radiological Environmental Operating Report 1-2 Energy Northwest/Columbia Generating Station

2.0 DEFINITIONS 2.0 DEFINITIONS Curie (Ci): A measure of radioactivity; equal to 3.7 x a priori: refers to a before the fact limit that represent 1010 disintegrations per second, or 2.22 x 1012 the capabilities of a measurement system and not a limit disintegrations per minute.

for a particular measurement.

a posteriori: refers to an after the fact limit Direct Radiation Monitoring: The measurement of determined for a particular measurement and not a limit radiation dose at various distances from the plant is for a measurement system. assessed using thermoluminescent dosimeters and pressurized ionization chambers.

Airborne Activity Sampling: Continuous sampling of air through the collection of particulates and DOE: U.S. Department of Energy.

radionuclides on filter media. Periodic soil samples are collected for gamma isotopic analysis to provide information on deposition to the soil from airborne EFSEC: Energy Facility Site Evaluation Council.

releases.

HEDP: Hanford External Dosimetry Program. Supplier Alpha Particle (): A charged particle emitted from the of environmental TLDs for the CGS REMP nucleus of an atom having a mass and charge equal in magnitude of a helium nucleus. Flow Proportional Sampling: Sample collection volume or frequency determined as a function of the flow rate of Becquerel (Bq): One disintegration per second. One the water being sampled.

picocurie (pCi) equals 0.037 becquerel.

Grab Sample: A single discrete sample drawn at one Beta Particle (): Charged particle emitted from the point in time.

nucleus of an atom with a mass and charge equal in magnitude to that of an electron. IDC: Energy Northwest Industrial Development Complex, formerly referred to as the WNP-1 and WNP-4 Blank Sample: A sample of the same media as the field sites.

sample being analyzed but without any radionuclide(s) being measured. It enables correction for the inherent Indicator Station: A sampling location that is likely to sample background. be affected by plant effluents due to its proximity and/or direction from the Columbia Generating Station.

CGS: Columbia Generating Station, formerly referred to as WNP-2. Ingestion Pathway Monitoring: The ingestion pathway includes milk, fish, and garden produce. Also sampled CGS Controlled Area: The area within a 1.2-mile (under special circumstances) are other media such as radius of the CGS reactor building and a narrow corridor vegetation and animal products such as eggs and meat extending from CGS east to the Columbia River. when additional information about particular radionuclides is needed.

CGS Protected Area: The area within the security fence surrounding CGS. Access to this area requires a security ISFSI: Independent Spent Fuel Storage Installation.

badge or escort.

Lower Limit of Detection (LLD): The smallest Composite Sample: A series of single collected portions concentration of radioactive material in a sample that will (aliquots) analyzed as one sample. The aliquots making yield a net count (above system background) that will be up the sample are collected at time intervals that are very detected with 95% probability with a 5% probability of a short compared to the composite period. false conclusion that a blank observation represents "real" signal.

Control Station: A sampling station in a location not likely to be affected by plant effluents due to its distance Mean: The average, i.e., the sum of results divided by the and/or direction from the Columbia Generating Station. number of results.

Counting Error: An estimate of the two-sigma Microcurie: 3.7 x 104 disintegrations per second, or 2.22 uncertainty associated with the sample results based on x106 disintegrations per minute.

respective count times.

Milliroentgen (mR): 1/1000 Roentgen; a unit of

+ / - 2 ( SampleCPM/ CountTime + BkgCPM/Cou ntTime)

_f exposure to X or gamma radiation.

2019 Annual Radiological Environmental Operating Report 2-1 Energy Northwest/Columbia Generating Station

MDA: Minimum Detectable Activity. Standard Error of the Mean: An estimate of the uncertainty associated with the mean of observation (or MSA: Mission Support Alliance. sample) averages. Also known as the standard deviation.

MDC: Minimum Detectable Concentration.

NEI: Nuclear Energy Institute SE =

J= S2 n

where S2, the variance is 2 1 NIST: National Institute of Standards and Technology. S = n ( Xi X ) 2 m ( n 1)

NPDES: National Pollutant Discharge Elimination System. SWTF: Sanitary Waste Treatment Facility. The sanitary waste processing facility for the Columbia Generating NRC: U.S. Nuclear Regulatory Commission. Station and other ENW facilities near the CGS site.

ODCM: Offsite Dose Calculation Manual. Licensing TEDA: triethylene diamine. A compound used in document that contains the NRC mandated effluent and charcoal cartridge filters to collect radioiodine.

offsite radiological monitoring requirements.

Thermoluminescent Dosimeter (TLD): A device used Picocurie (pCi): 1 x 10-12 Curie or one millionth of a to measure the amount of exposure to radiation. A crystal microcurie. 1 picocurie equal 0.037 becquerel or 2.22 phosphor that stores energy proportional to the amount of disintegrations per minute exposure; the exposure level is determined by heating the crystal and reading the amount of emitted light.

Radioiodine: Radioisotopes of iodine. For commercial nuclear reactors, iodine-131 to iodine-135 are the TMU: Tower Make Up.

principle radioiodines of concern. Due to its longer half-life, iodine-131 is the most probable radioiodine WaDOH: Washington State Department of Health.

identifiable in the environment.

WSU: Washington State University.

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 .

2019 Annual Radiological Environmental Operating Report 2-2 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 located 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 on all sides 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 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 in close proximity to 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) NUREG 1302,(5) and the 1979 NRC Branch Technical Position.(6) In addition, the REMP also meets the requirements of 10 CFR 72.44(d)(2)(20) for coverage of the ISFSI.

The quality assurance aspects of the sampling program and the thermoluminescent 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 levels of radioactivity over time is due to differences in geologic composition, meteorological conditions, decay of 2019 Annual Radiological Environmental Operating Report 3-1 Energy Northwest/Columbia Generating Station

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 in order 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.

2019 Annual Radiological Environmental Operating Report 3-2 Energy Northwest/Columbia Generating Station

4.0 PROGRAM DESCRIPTION 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 State of Washington Energy Facility Site Evaluation Council (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 taken into account in determining the sampling methodology.

4.1 Sample Locations One hundred and sixteen sampling locations (referred to as stations) were included in the monitoring program during 2019. More than one sample type may be collected at a sample station.

One hundred and six 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 on the basis of 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 TLD 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 TLDs placed at 12 locations on the second of three security fences that surround the facility. The TLDs are exchanged quarterly. Two additional TLD 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 TLD stations, Station 155, located WNW of the ISFSI, and Station 156, located to the NW of the ISFSI, were installed in order to further aid in monitoring ISFSI direct radiation. Figure 4-1 shows the 2019 Annual Radiological Environmental Operating Report 4-1 Energy Northwest/Columbia Generating Station

ISFSI location in relation to CGS and the position of these additional TLD locations. Figure 4-4 shows the location of the 12 TLD stations around the ISFSI second fence line. This arrangement of TLDs 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 2019 five- miles 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 TLD 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 Direct radiation dose levels are monitored with Harshaw Model 8807 thermoluminescent dosimeters (TLDs). The TLDs are placed in the field between three and five feet above the ground.

TLDs are wrapped in aluminum foil and sealed in plastic bags to prevent damage. TLDs are exchanged on a quarterly basis.

The locations of the TLD 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 TLD control location. Station 119C serves as the control for Station 119B (the cooling system sediment disposal basin). The remaining TLDs deployed in the field serve as indicator TLDs. The TLDs are arranged in a series of rings that encircle CGS. The innermost ring of TLD 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 TLDs, 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 TLDs are located at distances that range from a little under three miles to around ten miles.

Direct radiation is also monitored by TLDs at the ISFSI and at a number of 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 through the use of 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) are indicators. Air particulate samples are collected using 47mm diameter glass 2019 Annual Radiological Environmental Operating Report 4-2 Energy Northwest/Columbia Generating Station

fiber filters, 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 State of Washington 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)

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

• Shallow Groundwater; nine locations (MW-3, 5, 6 and MW-9 through MW-14)

• Plant Discharge Water; one location (Station 27)

• Storm Drain Water; one location (Station 101B)

• Sanitary Wastewater; one location (Station 102B)

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 also 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 of 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. Samples are collected monthly on a flow proportional basis and analyzed for gross beta, gamma emitting 2019 Annual Radiological Environmental Operating Report 4-3 Energy Northwest/Columbia Generating Station

radionuclides, and tritium. Sampling and analysis requirements for Station 101B are given in EFSEC Resolution 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 waste water from CGS, the IDC (ENW Industrial Development Complex), 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 nine 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 2019, two soil samples were collected from locations near CGS (Station 7 and 23), two samples from farmland in Franklin County east of CGS (Station 8 and 48), 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.

Following transfer, the material is allowed to dry and a post-disposal sample is collected and analyzed.

2019 Annual Radiological Environmental Operating Report 4-4 Energy Northwest/Columbia Generating Station

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 is 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. Station 36B was identified as the second monthly indicator milk sample location in 2018. This station is located 6.2 miles ESE of CGS and goat milk samples were collected from this location. 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 principle 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; however, none were collected in 2019. 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.

2019 Annual Radiological Environmental Operating Report 4-5 Energy Northwest/Columbia Generating Station

4.5 Split Sample Program In addition to the sample analyses performed by the Energy Northwest Environmental Services laboratory, a number of the samples collected are split and independently analyzed by the Washington State Department of Health (WaDOH). CGS REMP personnel typically collects these samples, ships a representative portion to the WaDOH laboratory, then separately analyzes another portion of the sample. For media such as air particulates or TLDs where sample splitting is not feasible, the WaDOH co-locates a TLD 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, 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 TLDs in 2019 were processed at the Hanford External Dosimetry Program (HEDP) laboratory located on the Hanford site. The HEDP is operated by Mission Support Alliance (MSA). Carbon-14 analysis of apples was performed by the Washington State Department of Health (WaDOH) in 2019. 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 TLDs REMP TLDs are analyzed on a Harshaw Model 8800 hot gas reader. The reader is calibrated immediately prior to processing the environmental TLDs. The reader is calibrated with TLDs that have been given a known exposure from a cesium-137 source. Each group of environmental TLDs is processed with blank (freshly annealed) TLDs and spiked TLDs that have been given a known exposure. Exposure received by the field TLDs 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 TLDs, the building controls, are used to determine the exposure of the TLDs at the storage location. The TLD 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.

2019 Annual Radiological Environmental Operating Report 4-6 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.

2019 Annual Radiological Environmental Operating Report 4-7 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 a period sufficient 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 These hard to detect analytes are 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.

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

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

4.8 Changes to the Sampling Program in 2019 No changes made to the sampling program in 2019.

2019 Annual Radiological Environmental Operating Report 4-8 Energy Northwest/Columbia Generating Station

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLE COLLECTION TYPE AND REQUIRED BY SAMPLES AND SAMPLE FREQUENCY FREQUENCY OF LOCATIONS(a) ANALYSIS DIRECT RADIATION (b)

TLD Thirty-four routine monitoring stations Quarterly. Gamma dose quarterly.

either with two or more dosimeters or with one instrument for measuring and recording dose rate continuously, placed as follows:

An inner ring of stations, one in each ODCM 6.3.1-1 1 meteorological sector in the general area of the Site Boundary (ST: 1, 2, 13-20, 22, 24, 25, 49-51).

An outer ring of stations, one in each of the ODCM 6.3.1-1 1 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).

The balance of the stations to be placed in ODCM 6.3.1-1 1 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).

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

TLD 9.6 miles SSE (ST-4) Continuous Exposure Exposure Rate EFSEC 332 6.5 miles SE (ST-40) (milliroentgen/period) 7.7 miles S (ST-6) Quarterly Collection 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 TLD 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) 4 or more TLDs located on ISFSI security Continuous Exposure Exposure Rate EFSEC 332 TLD ISFSI fence line. (ST: 124, 128, 129, 137B) (milliroentgen/period)

Quarterly Collection 2019 Annual Radiological Environmental Operating Report 4-9 Energy Northwest/Columbia Generating Station

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLE COLLECTION TYPE AND REQUIRED BY SAMPLES AND SAMPLE FREQUENCY FREQUENCY OF LOCATIONS(a) ANALYSIS TLD 0.44 miles WSW (ST-58) Continuous Exposure Exposure Rate OTHER-Special 8.87 miles S (ST-65) (milliroentgen/period) study stations Quarterly Collection 0.90 miles ESE (ST-150) 0.83 miles E (ST-151) 0.30 miles NW (ST-155) 0.33 miles NNW (ST-156) 0.17 miles WNW (ST-88) CGS initiative 0.23 miles WSW (ST-89) 0.28 miles SSE (ST-119C) EFSEC 299 0.31 miles S (ST-119B)

AIRBORNE Particulates and Samples from six locations: Continuous sampler Radioiodine Radioiodine operation with sample Canister:

collection weekly, or more I-131 analysis One sample from close to the Site Boundary frequently if required by weekly. ODCM 6.3.1-1 2 location, having a high calculated annual dust loading.

average ground-level D/Q. (ST-57) Particulate Three samples from close to the three Sampler: ODCM 6.3.1-1 2 Columbia River locations having the highest Gross beta calculated D/Q. (ST: 8, 40, and 48) radioactivity One sample from the vicinity of a analysis ODCM 6.3.1-1 2 community having the highest calculated following filter annual average ground level D/Q. (ST-4) change, (c)

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

Particulates and 1.3 miles S (ST-1) Continuous Sampling Radioiodine analysis (I- EFSEC 332 Radioiodine 3.0 miles ESE (ST-23) 131) Weekly 4.6 miles NE (ST-48) Weekly Collection 9.6 miles SSE (ST-4) Particulate Gross Beta 6.5 miles SE (ST-40) analysis weekly 7.7 miles S (ST-6)

Particulate gamma 2.8 miles WNW (ST-7) isotopic of quarterly 4.4 miles ESE (ST-8) composite (by location) 28 miles WSW (ST-9)

Particulates and 7.72 miles ESE (ST-5) Continuous Sampling Radioiodine analysis (I- CGS Initiative Radioiodine 1.1 miles ESE (ST-21B) 131) Weekly Weekly Collection Particulate Gross Beta analysis weekly Particulate gamma isotopic of quarterly composite (by location) 2019 Annual Radiological Environmental Operating Report 4-10 Energy Northwest/Columbia Generating Station

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLE COLLECTION TYPE AND REQUIRED BY SAMPLES AND SAMPLE FREQUENCY FREQUENCY OF LOCATIONS(a) ANALYSIS WATERBORNE

a. Surface (e) One sample upstream (ST- 26) Composite sample over one Gamma isotopic analysis ODCM 6.3.1-1 3a One sample downstream (ST-29) month period.(f) (d) monthly. Composite for tritium analysis quarterly.

b. Ground Samples from one or two sources only if Grab sample performed Gamma isotopic(d) and ODCM 6.3.1-1 3b (g) likely to be affected. (ST-31) quarterly tritium analysis quarterly.

c. Drinking One sample of each of one to three of the Composite sample over I-131 analysis on each ODCM 6.3.1-1 3c nearest water supplies that could be affected two week period (f) when I- composite when the dose by its discharge. (ST-27) 131 analysis is performed; calculated for the monthly composite consumption of the water otherwise. is greater than one mrem One sample from a control location. (ST-26) per year. (h)

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

Composite for tritium analysis quarterly.

Sanitary Waste ST-102B Composite Aliquots. Monthly gamma isotopic, EFSEC 300 Treatment Facility Monthly collection. gross beta, gross alpha, Water and tritium.

Ground Water ST-32 Grab sample performed Quarterly gamma isotopic OTHER-Special quarterly and tritium. study stations Ground Water MW-3, 5, 6, 9-14 Grab sample performed Quarterly gamma isotopic NEI 07-07 and Monitoring quarterly and tritium. NPDES Evaporation Pond EVP-1A, 1B, 2 Grab sample performed Annual gamma isotopic EFSEC 874 Water annually and tritium Evaporation Pond EVP-3, 4 Grab sample performed Annual gamma isotopic CGS Initiative Water annually and tritium River Intake, 3.2 miles E (ST-26) Composite Aliquots Gamma Isotopic, Gross EFSEC 332 Plant Discharge, 3.2 miles E (ST-27) Beta, and Tritium on all Storm Drain, 0.2 miles ENE (ST-101B) Monthly Collection samples.

and Drinking 11.6 miles SSE (ST-29)

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

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) Composite Aliquots Gamma Isotopic, Gross EFSEC 874 Beta, and Tritium on all Monthly Collection samples.

2019 Annual Radiological Environmental Operating Report 4-11 Energy Northwest/Columbia Generating Station

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLE COLLECTION TYPE AND REQUIRED BY SAMPLES AND SAMPLE FREQUENCY FREQUENCY OF LOCATIONS(a) ANALYSIS Ground Water 0.1 miles N (ST-52) Quarterly Grab Samples Gamma Isotopic and EFSEC 332 From two shallow groundwater well locations. Tritium.

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

SOIL AND SEDIMENT

d. Sediment from One sample from downstream area with Semiannually. Gamma isotopic analysis ODCM 6.3.1-1 3d (d) shoreline existing or potential recreational value. (ST- semiannually.

34)

Evaporation Pond EVP-3, 4 Grab sample performed Annual gamma isotopic. EFSEC 874 Sediment annually Cooling System ST-119B Grab sample of dried Gamma Isotopic. After EFSEC 299 Sediment sediment within 30 days of disposal.

Disposal Area disposal date.

River Sediment ~2.0 miles upstream (ST-33) Annual Grab sample Gamma Isotopic EFSEC 332

~1.0 miles downstream (ST-34)

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 Annual Grab Sample Gamma Isotopic EFSEC 332 historically sampled, two samples from locations in Franklin County, one sample Sr-90 as needed (see note) from control location.

Locations near CGS historically sampled include air sample stations 1, 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.

INGESTION

a. Milk Samples from milking animals from at least Monthly in the first half of Gamma isotopic (d) (k) , ODCM 6.3.1-1 4a one location within 10 miles distance having the month. Iodine-131 analysis the highest dose potential, if available.(h) (ST- monthly 36)

Samples from location within 10 miles Monthly during the distance where milking animals are known to grazing season, in the be on pasture. If unavailable, collect an second half of the month.

additional sample from the location with the highest dose potential, if available.(h) (ST-36B)

Monthly 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) 2019 Annual Radiological Environmental Operating Report 4-12 Energy Northwest/Columbia Generating Station

TABLE 4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SAMPLING PLAN SAMPLE TYPE NUMBER OF REPRESENTATIVE SAMPLE COLLECTION TYPE AND REQUIRED BY SAMPLES AND SAMPLE FREQUENCY FREQUENCY OF LOCATIONS(a) ANALYSIS Milk Milk from at least 1 Dairy Semi monthly Gamma Isotopic and I- EFSEC 332 within 10 miles of CGS. (ST-36) (see note) when milk animals are on 131 analysis on all pasture, monthly at other samples collected.

Milk control from Dairy > 20 miles from CGS times.

and in sector not likely to be effected by CGS Sr-90 if Cs-134/137 operation. (ST-9B) identified in excess of 30 pCi/l 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 One sample of each of three recreationally Sample annually, unless an Gamma isotopic analysis ODCM 6.3.1-1 4b (d)

Invertebrates important species (one anadromous and two impact is indicated, then on edible portions.

resident) in vicinity of plant discharge area. semiannually. (i)

(ST-30)

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

Fish One sample from 3 species (one anadromous Annually, unless an impact Gamma Isotopic on edible EFSEC 332 and two resident) in the vicinity of the plant is indicated, then portions.

discharge area. (ST- 30) semiannually One sample from the same or similar species from areas not influenced by plant discharge.

(ST-38)

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.

c. Food 1 sample of each principal class of food At time of harvest.(j) Gamma isotopic analysis ODCM 6.3.1-1 4c (d)

Products products from any area that is irrigated by on edible portions.

water in which liquid plant wastes have been discharged. (ST-9C, 37 , 48G, 104 ,

37B)

Fruits and Samples of fruits and vegetables grown for During growing season, at Gamma Isotopic on edible EFSEC 332 Vegetables human consumption from locations using time of availability. portions.

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 Annual control collection locations. (ST-9C)

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.

2019 Annual Radiological Environmental Operating Report 4-13 Energy Northwest/Columbia Generating Station

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 in 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, a thermoluminescent dosimeter (TLD) is considered to be one phosphor card with multiple readout areas; a phosphor card in a packet is considered to be 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 TLD systems will depend upon the characteristics of the specific system used and should be selected to obtain optimum dose information with minimal fading.)

(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.

2019 Annual Radiological Environmental Operating Report 4-14 Energy Northwest/Columbia Generating Station

TABLE 4-2 REMP SAMPLE STATIONS AND REQUIREMENTS STATION DISTANCE SECTOR(a) NUMBER(b) MILES(c) ODCM(d) STATE(e) OTHER(f)

N (1) 52 0.07 DGW DGW 71(1S) 0.28 TLD 47 0.70 TLD 57 0.70 AP/AI 18 1.16 TLD TLD 53 7.54 TLD NNE (2) 72(2S) 0.32 TLD 2 1.45 TLD TLD 54 6.08 TLD EVP-1A 0.31 Dis W NE (3) 73(3S) 0.54 TLD 19 1.74 TLD TLD 48 4.59 AP/AI AP/AI, SO (k) 48G 4.63 GP 46 4.99 TLD 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 TLD 21 1.45 TLD, SO 20 1.93 TLD TLD 11 3.16 TLD 33 3.44 SE 45 4.45 TLD 44 5.90 TLD 101B 0.22 Dis W MW-11 0.10 SGW SGW EVP-4 0.60 SE E (5) 75(5S) 0.37 TLD 22 2.08 TLD 10 3.16 TLD TLD 26 3.19 SW, DW SW 27 3.19 SW Dis W (g) 30 3.5 FI FI 43 5.63 TLD (k) 104 5.08 GP 151 (Site 4) 0.83 TLD MW-12 0.12 SGW SGW 2019 Annual Radiological Environmental Operating Report 4-15 Energy Northwest/Columbia Generating Station

TABLE 4-2 REMP SAMPLE STATIONS AND REQUIREMENTS STATION DISTANCE SECTOR(a) NUMBER(b) MILES(c) ODCM(d) STATE(e) OTHER(f)

ESE (6) 76(6S) 0.42 TLD 31 1.06 DGW 32 1.27 DGW 51 2.14 TLD 34 3.32 SE SE 23 3.03 TLD, AP/AI, SO 8 4.39 TLD, AP/AI TLD, AP/AI, SO 42 5.85 TLD 36 7.33 MI MI (n) 36B 6.2 MI MI 5 7.72 TLD SO AP/AI (g) 38 26 FI FI 21B 1.1 AP/AI 150 (Site 1) 0.90 TLD SE (7) 77(7S) 0.57 TLD 24 1.87 TLD TLD 3 2.06 TLD 41 5.79 TLD 40 6.51 TLD, AP/AI AP/AI MW-14 0.58 SGW SGW SSE (8) 119C 0.28 TLD 102B 0.50 SFW 78(8S) 0.81 TLD 25 1.50 TLD TLD 55 6.05 TLD 4 9.57 TLD, AP/AI TLD, AP/AI 29 11.57 DW DW 37(h) 16 GP GP,SO 37B(h) 10.1 GP GP MW-6 0.33 SGW SGW MW-13 0.52 SGW SGW S (9) 119B 0.31 TLD, SE 79(9S) 0.76 TLD 1 1.25 TLD TLD, AP/AI, SO 6 7.72 TLD TLD, AP/AI 65 8.87 TLD SSW (10) 80(10S) 0.83 TLD 50 1.26 TLD TLD 56 6.65 TLD MW-3 0.31 SGW SGW 2019 Annual Radiological Environmental Operating Report 4-16 Energy Northwest/Columbia Generating Station

TABLE 4-2 REMP SAMPLE STATIONS AND REQUIREMENTS STATION DISTANCE SECTOR(a) NUMBER(b) MILES(c) ODCM(d) STATE(e) OTHER(f)

SW (11) 81(11S) 0.74 TLD MW-5 0.43 SGW SGW 13 1.26 TLD TLD 9B 23.2 MI MI WSW (12) 82(12S) 0.57 TLD 14 1.26 TLD TLD 9A 28.35 TLD, AP/AI TLD, AP/AI, SO 9C(i) 32 GP GP 89(j) 0.23 TLD 58 0.44 TLD W (13) 83(13S) 0.52 TLD 15 1.24 TLD TLD WNW (14) 84(14S) 0.55 TLD 16 1.21 TLD TLD 7 2.83 TLD TLD, AP/AI, SO (j) 88 0.17 TLD MW-10 0.07 SGW SGW NW (15) 85 (15S) 0.43 TLD 130 0.24 TLD 49 1.19 TLD TLD 155 0.30 TLD NNW (16) 121 0.12 TLD 122 0.31 TLD 123 0.29 TLD (m) 124 0.28 TLD TLD 125 0.28 TLD 126 0.28 TLD 127 0.26 TLD (m) 128 0.25 TLD TLD (m) 129 0.17 TLD TLD 131 0.21 TLD 136B 0.29 TLD (m) 137B 0.24 TLD TLD 138B 0.17 TLD 86 (16S) 0.31 TLD 17 1.19 TLD TLD 12 6.74 TLD 156 0.33 TLD 2019 Annual Radiological Environmental Operating Report 4-17 Energy Northwest/Columbia Generating Station

TABLE 4-2 SAMPLE TYPE KEY AP/AI - Air Particulate/Air Iodine DW - Drinking Water Dis W - Discharge Water FI - Fish GP - Garden/Orchard Produce DGW - Deep Ground Water MI - Milk SE - Sediment SFW - Sanitation Facility Water SO - Soil SW - Surface Water TLD - Thermoluminescent Dosimeter VE - Vegetation SGW - Shallow Ground Water 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., TLD 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 - State of Washington 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. TLD 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.

(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 the majority 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 2019. Quarterly TLDs were deployed at both stations in 2019. No air samples were collected from any of these locations in 2019.

(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 broad leaf vegetable samples from both stations 48G and 104 in 2019.

(l) MW-3, 5, 6, 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 TLD stations listed as state requirements. Actual EFSEC 332 requirement is to have 4 or more TLDs located on the ISFSI security fence. Any 4 of the 12 TLD 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.

2019 Annual Radiological Environmental Operating Report 4-18 Energy Northwest/Columbia Generating Station

TABLE 4-3 2019 FIVE MILE LAND USE CENSUS RESULTS NEAREST GARDEN(d)

SECTOR(a) RESIDENT(b) (>500 ft2) DAIRY ANIMALS(e) LIVESTOCK(b,c)

NE 4.50 4.63 none 4.63 ENE 3.88 none none 4.95 E 4.64 5.08 none 4.64 ESE 4.26 none 6.17 none 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) Ten to fifteen beef cattle were identified in a pasture in the ENE sector. The western edge of the pasture is just within the 5-mile radius of CGS. Additional feed appears to be provided at this location. A single horse was observed at a residence in the E sector, there is little pasture at this location and the horse appear to be fed mostly hay. Four chickens were observed in NE sector, there is no pasture at this location.

(d) The garden in the NE sector is located approximately 200 yards from the Station 48 air sampler and is irrigated using water from a local spring. The garden in the E sector, though technically outside the 5-mile radius of CGS, was included as dose projections indicated higher deposition potential at this location than at any other garden identified. CGS REMP obtained broad leaf vegetable samples from the gardens in the NE and E sector in 2019. In addition to the 2 gardens, 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) Eight head of goats 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. Samples of goat milk obtained from this location served as second monthly sample.

2019 Annual Radiological Environmental Operating Report 4-19 Energy Northwest/Columbia Generating Station

TABLE 4-4 COMPARISON OF LABORATORY NOMINAL LOWER LIMITS OF DETECTION WITH OFFSITE DOSE CALCULATION MANUAL REQUIREMENTS ENERGY NORTHWEST ODCM REQUIRED MEDIA (UNITS) ANALYSIS LLDs(a) LLDs Air Gross Beta 0.002 0.01 (pCi/m3) Cs-134 0.001 0.05 Cs-137 0.001 0.06 I-131 0.03 0.07 Water: Gross Beta 2.4 4 (pCi/liter) Tritium 300 2000(b)

Sr-90 1 ---

Ni-63 5 ---

Fe-55 200 ---

I-131(c) 1 ---

Mn-54 7 15 Fe-59 10 30 Co-58 7 15 Co-60 7 15 Zn-65 10 30 Zr-Nb-95 7 15 Cs-134 7 15 Cs-137 7 18 Ba-La-140 10 15 Soil/Sediment: Mn-54 20 ---

(pCi/kg dry) Co-60 20 ---

Zn-65 30 ---

Cs-134 20 150 Cs-137 20 180 Sr-90 10 ---

Fish: Mn-54 25 130 (pCi/kg wet) Fe-59 100 260 Co-58 35 130 Co-60 25 130 Zn-65 50 260 Cs-134 30 130 Cs-137 25 150 Milk: I-31(c) 0.5 1 (pCi/liter) Cs-134 8 15 Cs-137 8 18 Ba-La-140 10 15 Sr-90 1 ---

Garden Produce: Cs-134 20 60 (pCi/kg wet) Cs-137 20 80 I-131 20 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 media.

2019 Annual Radiological Environmental Operating Report 4-20 Energy Northwest/Columbia Generating Station

0 0.5 Miles ISFSI TLDs on perimeter fence 123 to 131 &

136 to 138 A

84 A

74

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A 75 A

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W3 119B W6 A A 80 78 Standby Service

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@ Shallow Well FIGURE 4-1 SELECT REMP SAMPLING LOCATIONS WITHIN 0.8 MILES OF CGS 2019 Annual Radiological Environmental Operating Report 4-21 Energy Northwest/Columbia Generating Station

0 0.5 2 3 4 I I Miles Columbia River

... ... 33 2 19

... 20 49 16 11 21

... "26, 27 15 W31 2 ... 10 22 34 51 23 3

25 24 Water Sample ~ Sediment ~ Facilities N

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~ Wate r FIGURE 4-2 SELECT REMP SAMPLING LOCATIONS BETWEEN 0.8 AND 2.8 MILES 2019 Annual Radiological Environmental Operating Report 4-22 Energy Northwest/Columbia Generating Station

0 2.75 Water Sample 1111 Reactor Building ~ Facilities N

... TLD c=J Security Barrier ~Water Air Sample ~ City Limits Milk Sample i

FIGURE 4-3 SELECT REMP SAMPLING LOCATIONS BEYOND 2.8 MILES 2019 Annual Radiological Environmental Operating Report 4-23 Energy Northwest/Columbia Generating Station

342 fl r------------------------

I --------ora,oemJ 1 ST-123 ST-124 ST-125 r - - - - - - -

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• TLD Stations FIGURE 4-4 ISFSI TLD STATION LAYOUT 2019 Annual Radiological Environmental Operating Report 4-24 Energy Northwest/Columbia Generating Station

5.0 RESULTS AND DISCUSSION 5.0 RESULTS AND DISCUSSION The 2019 Annual Radiological Environmental Operating Report for CGS covers the period from January 2019 to December 2019. Table 5-2 provides a summary of the ODCM required REMP sample 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 TLD locations surrounding CGS. TLDs 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 shows the 2019 "S" station mean quarterly TLD 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 - 2018 operational period for comparison. The 2019 S station TLD results were lower than the pre-operational mean in 11 of the 16 sectors and lower than the operational mean in 12 of the 16 sectors. TLD results from the N, NNE, and NNW sectors are slightly higher than the other S station locations as a result of being physically closer to the Independent Spent Fuel Storage Installation (ISFSI) and the CGS turbine building. TLD results for the NE sector (Station

73) have been slightly elevated since the 4th quarter in 2013 due to a mound of excavation dirt piled near the TLD station that increased the natural background at this location.

Excluding the NNW sector data, the average deviation relative to the operational period was -2.34%;

in 2018 the average deviation was -3.85%. The NNW sector is the closest S station to the ISFSI and the higher result here is attributed to the stations close proximity to this facility.

0.36 S-Stations 0.33 0.30 0.27 mR/Day 0.24 0.21 0.18 0.15 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW

• Pre-Operational Mean 2019 Mean 1984-2018 High/Low/Mean Figure 5-1 S Stations Quarterly TLDs 1984-2018 Hi/Low/Mean and 2019 Mean by Sector 2019 Annual Radiological Environmental Operating Report 5-1 Energy Northwest/Columbia Generating Station

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 TLD 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 1984-2018 operational period for comparison. The 2019 near plant TLD results were lower than the pre-operational mean in 14 of the 16 sectors and less than the operational mean in 16 of the 16 sectors. The average deviation relative to the operational period was -3.6%; in 2018 the average deviation was -5.0%.

0.36 Near Plant Stations 0.33 0.30 0.27 mR/Day 0.24 0.21 0.18 0.15 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW

• Pre-Operational Mean 2019 Mean 1984-2018 High/Low/Mean Figure 5-2 Near Plant Stations Quarterly TLDs 1984-2018 Hi/Low/Mean and 2019 Mean by Sector 0.36 Remote Stations 0.33 0.29 mR/Day 0.26 0.22 0.19 0.15 N NNE NE ENE E ESE SE SSE S SSW WSW WNW NNW

• Pre Operational Mean 2019 Mean 1984-2018 High/Low/Mean Figure 5-3 Remote Stations Quarterly TLDs 1984-2018 Hi/Low/Mean and 2019 Mean by Sector The 22 TLD 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 shows the exposure rates for the remote TLD 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 for the 1984-2018 operational period 2019 Annual Radiological Environmental Operating Report 5-2 Energy Northwest/Columbia Generating Station

for comparison. The 2019 remote TLD results were lower than both the pre-operational mean and the operational mean in all 13 sectors. 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. The 2019 average deviation relative to the operational period was -5.0%; the average deviation in 2018 was -7.0%.

Offsite direct radiation monitoring results are consistent with previous years. The 2019 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 2019, 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 2019 quarterly TLD results. TLD 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 quarterly.

Near Plant Stations 0.14 Data from 1986 weeks 19-23 not included due to Chernobyl 0.12 0.10 0.08 pCi/m3 0.06 0.04 0.02 0.00 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 53 WEEK HIGH/LOW/MEAN 1985-2018 MEAN 2019 Control 2019 Figure 5-4 1985-2018 Weekly Hi/Low/Mean and 2019 Weekly Mean Gross Beta in Air - Near Plant Stations Figure 5-4 above illustrates the 2019 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 similar to results from the remote locations and follow the trend of the control location.

2019 Annual Radiological Environmental Operating Report 5-3 Energy Northwest/Columbia Generating Station

The 2019 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.

Remote Stations 0.14 Data from 1986 weeks19-23 not included due to Chernobyl 0.12 0.10 pCi/m3 0.08 0.06 0.04 0.02 0.00 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 53 WEEK HIGH/LOW/MEAN 1985-2018 MEAN 2019 Control 2019 Figure 5-5 1985-2018 Weekly Hi/Low/Mean and 2019 Weekly Mean Gross Beta in Air - Remote Stations 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 typically 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 February, March, November, and December. 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 week 45; weather conditions for the week were characterized by air stagnation and fog.

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. Naturally occurring potasium-40 was also identified in one of the indicator samples. No radioisotopes associated with CGS operation were identified in any of the quarterly air particulate gamma isotopic sample results.

The 2019 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 2019 air particulate and iodine sample results show no evidence of measurable environmental radiological air quality impact that can be attributed to CGS plant operation.

2019 Annual Radiological Environmental Operating Report 5-4 Energy Northwest/Columbia Generating Station

5.3 Water 5.3.1 Surface Water Monthly composite surface water samples are collected at five locations and analyzed for tritium, gross beta, and gamma emitting radionuclides. A graph of the 2019 gross beta results for the plant intake, plant discharge, and river/drinking water stations is shown in Figure 5-6.

Gross Beta in Water 2019 12.0 10.0 8.0 6.0 pCi/liter 4.0 2.0 0.0

-2.0 1 2 3 4 5 6 7 8 9 10 11 12 Month Station 26 Station 27 Station 29 Figure 5-6 Gross Beta in River/Drinking (Stations 26 & 29) and Plant Discharge Water (Station 27) for 2019 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 of the twelve 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; 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).

2019 Annual Radiological Environmental Operating Report 5-5 Energy Northwest/Columbia Generating Station

Tritium in Water 2019 600 500 400 300 pCi/liter 200 100 0

-100

-200 1 2 3 4 5 6 7 8 9 10 11 12 Month Station 26 Station 27 Station 29 Tritium LLD (300 pCi/l)

Figure 5-7 Tritium in River/Drinking (Stations 26 & 29) and Plant Discharge Water (Station 27) for 2019 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 2019. 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 Ground Water Samples from 3 deep wells were collected quarterly to meet ODCM and EFSEC Resolution No. 332(9) requirements. Quarterly samples were also collected from nine shallow groundwater monitoring wells located near CGS as part of the CGS groundwater monitoring program. 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 nine 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 located 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.

2019 Annual Radiological Environmental Operating Report 5-6 Energy Northwest/Columbia Generating Station

Gamma Spectroscopy results for the nine shallow monitoring wells identified only natural occurring radionuclides (See Appendix A, Tables B-10.1, and B-10.2). The 2019 groundwater sample results show no evidence that CGS made a measurable radiological impact on groundwater.

Tritium results for the nine shallow monitoring wells ranged from < LLD to 12,600 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 with the exception of MW-3 which showed a marked decrease in tritium concentration starting in the 2nd quarter of 2017 and remained at below its historic trend level during 2019. 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 ground water 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 was directed to the lined evaporation ponds in 2019.

5.4 Soil Gamma spectroscopy analysis was performed on soil samples from five different locations in 2019 (See Appendix A, Tables A-8.1, A-8.2). Two samples were collected from locations near CGS, two samples were collected for 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 and also the control location. 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.

5.5 River Sediment Gamma spectroscopy results of river sediment identified naturally occurring radionuclides and cesium-137 (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) and 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). The same three species; walleye, bass, and salmon, were collected at both the indicator and control locations. No radiological impact attributable to CGS operation was identified in the 2019 fish sample results.

2019 Annual Radiological Environmental Operating Report 5-7 Energy Northwest/Columbia Generating Station

5.7 Milk No radioiodine activity was identified in any of the milk samples collected in 2019 (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. The 2019 milk analysis results indicate no measurable impact due to CGS plant operation.

5.8 Garden Produce Gamma analysis was performed on thirty five samples of fruits, vegetables, and root crops in 2019 (See Appendix A, Tables A-15.1, A-15.2, A-16.1, A-16.2, A-17.1, A-17.2). No radionuclides related to CGS operation were identified in any of the samples. Naturally occurring potassium-40 was identified in all samples.

5.9 Special Interest Stations Sampling and analysis is 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. TLD monitoring in the vicinity of the planned ISFSI was first performed in 1998 to collect background data and TLD monitoring was established on the ISFSI fence line after construction was completed in 2002. Additional TLD 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. Low level cobalt-60 was identified in the August 2019 composite sample; the finding was documented in Condition Report (CR) 400110. The most probable source of the activity was from heavy rain event in mid-August. No gamma emitting radionuclides of interest were identified in September and October samples. (See Appendix A, Tables B-2.1, B-2.2). Gross beta was identified above background in 2 of the 12 monthly samples (See Appendix A, Tables B-3.1, B-3.2). Tritium was detected in eleven of the twelve samples (See Appendix A, Tables B-4.1, B-4.2). The samples with higher tritium levels were all 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 2019 was slightly lower than the amount determined for 2018.

2019 Annual Radiological Environmental Operating Report 5-8 Energy Northwest/Columbia Generating Station

Water grab samples were taken from all five ponds in April and analyzed for tritium, gross beta, and gamma emitting radionuclides. Gross beta results were below the analysis detection limits and no gamma emitting radionuclides related to CGS operation were identified in any of the samples (See Appendix A, Tables B-12.1 and 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. Due to the amount of water remaining in the ponds, the samples were taken from locations near the side of the ponds and below the water line. Only natural occurring radionuclides identified both ponds 3 and 4. (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 eleven of the twelve Station 102B samples. The levels identified were consistent with levels identified in previous years. Gross alpha was not positively identified in any of the Station 102B samples (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).

No tritium activity was identified in any of the Station 102B samples in 2019 (See Appendix A, Tables B-8.1, B-8.2). Tritium activity has not been identified in the Station 102B samples since processing of DOE 400 area wastewater was terminated in 2013.

5.9.3 Cooling System Sediment Disposal Area (Station 119)

EFSEC Resolution No. 299(18) 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) requires direct radiation monitoring using quarterly TLDs 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 in order to confirm that the disposal criteria outlined in the resolution have not been exceeded.

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.

2019 Annual Radiological Environmental Operating Report 5-9 Energy Northwest/Columbia Generating Station

Cleaning of the CGS cooling towers was performed in May and October 2019. The May cleaning occurred during the R-24 refueling outage and it involved removal of sediment from both the upper tower decks and the tower basins. The October cleaning was limited to the upper tower decks only.

Disposal of the material removed resulted in an estimated 410 cubic meters of dry sediment being added to the disposal cells in May and an additional 55 cubic meters in October.

A summary of the estimated mass and radionuclide content of all transfers to the disposal cell area in 2019 is presented in Figure 5-8. 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 Figure 5-8, all material transferred to the disposal cell area in 2019 (See Appendix A, Tables B-9.1) was considerably below the disposal concentration limits specified in EFSEC Resolution No. 299. (18) The cobalt-60 and cesium-137 activity levels identified were within the range historically observed for cooling tower sediment. Cesium-137 levels were within the range typically observed in Hanford area soils.

Measurements of direct radiation at the disposal pit area were taken using TLDs. 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). The negligible difference between the indicator and the control TLDs indicate that there was no measureable dose contribution above background due to material in the disposal cells (See Tables 5.3 and Appendix A, Tables B-1.1).

2019 Cooling System Sediment Disposal Data Disposal Date May-19 Oct-19

Description:

R-24 Cleaning Fall Cleaning Pit ID: 2019a and b 2019b Mass, kg 249,660 2,020 Density, g/cc 0.61 0.037

• Unity 3.46E-02 7.53E-02 Calculation Analytical Analytical Total Activity Nuclide Limit (pCi/kg)

Result (pCi/kg) Result (pCi/kg) (Curie)

Co-60 5.00E+03 < 6.3E+01 2.3E+02 1.6E-05 Mn-54 3.00E+04 < 6.1E+01 < 7.0E+01 1.5E-05 Zn-65 5.00E+04 < 2.1E+02 < 2.8E+02 5.2E-05 Cs-134 1.00E+04 < 1.2E+02 < 1.4E+02 3.0E-05 Cs-137 2.00E+04 < 7.7E+01 1.6E+02 2.0E-05 Total: 1.3E-04

• T he sum of t he fractions of maximum concentration for each nuclide does not exceed 1 in accordance with EFSEC Resolut ion 299, At tachment 1 Sect ion 3B.

Figure 5-8 Cooling System Sediment Activity Levels for Disposals Made in 2019 2019 Annual Radiological Environmental Operating Report 5-10 Energy Northwest/Columbia Generating Station

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 TLD stations are located on the second of three security fences that surround the ISFSI.

Four other TLD locations; Stations 121, 122, 155, and 156, are located near the ISFSI to provide additional monitoring of ISFSI direct radiation. The ISFSI was expanded in 2016 and a new pad installed. Refer to Figure 4-4 for a map showing ISFSI TLD locations.

No new spent fuel casks were added to the ISFSI in 2019. As shown in Figure 5-9, exposure rates at the ISFSI fence line show a downward trend since the second quarter 2018 when spent fuel was last added to the ISFSI. The TLD stations with the highest dose rates are located on the south fence; these stations are closest in proximity to the spent fuel casks moved to the ISFSI in 2018.

Trend of Exposure Rates at ISFSI Fence Line 3.4 3.0 2.6 0"' 2.2 ii::

E C

Q)

1.8 1.4 1.0 0.6 0.2

~ 124 -o-- 125 - + - 126 - - - 121 --o- 128 ---+- 129 - e - 136A - - 137A

--o-- 138A ~ 130 ~ 131 - 123 ~ 1368 ---+- 1378 -+-- 1388 Figure 5-9 ISFSI TLD Trend at CGS TLD results from Stations 122, 155, and 156 show mostly a flat trend line for the year. Results from these locations are slightly above background as expected due to their close proximity to the ISFSI.

Station 121 showed a marked decrease in the 2nd quarter then a return to the normal trend range in the 3rd and 4th quarters. The 2nd quarter decrease corresponds to the R-24 outage when turbine building radiation levels were greatly reduced. 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).

2019 Annual Radiological Environmental Operating Report 5-11 Energy Northwest/Columbia Generating Station

5.9.5 Miscellaneous Environmental Sample Results Apple samples from both control and indicator locations were collected in the summer and fall of 2019 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 B, Table B-17.1).

Quarterly TLDs were exchanged at three Stations 58, 88, and 89 in 2019 for monitoring DOE 618-11 burial ground located just west of CGS (See Figure 4-1). The results were consistent with the historical trend (See Appendix A, Table B-1.1).

Snow samples collected from six locations on the CGS site in March 2019 were analyzed for tritium content as a CGS initiative. All results were below the analysis method a priori LLD (See Appendix A, Table B-16.1).

5.10 2019 Sample Deviations A summary of REMP sample deviations encountered in 2019 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 2019 PLANS FOR SAMPLE PREVENTING DATE LOCATION CR/WO PROBLEM MEDIA RECURRENCE NA NA NA NA NA NA 2019 Annual Radiological Environmental Operating Report 5-12 Energy Northwest/Columbia Generating Station

TABLE 5-1B EFSEC REMP Sample Deviations for 2019 PLANS FOR SAMPLE PREVENTING DATE LOCATION CR/WO PROBLEM MEDIA RECURRENCE Station was out of Corrective actions are 5/13/19 deemed not possible due service for 33 hours3.819444e-4 days <br />0.00917 hours <br />5.456349e-5 weeks <br />1.25565e-5 months <br /> Air Sampler to Station 1 393912 to the remote nature of due to planned power 5/15/19 the sample station.

outage.

Station was found to Added contact be out of service and information to facilities 6/13/19 not collecting checklist to notify REMP Water to Station 101B 395702 samples due to personnel.

6/17/19 unexpected loss of power.

TABLE 5-1C ODCM & EFSEC REMP Sample Deviations for 2019 PLANS FOR SAMPLE PREVENTING DATE LOCATION CR/WO PROBLEM MEDIA RECURRENCE TMU-SR-1 was out Repaired pump.

3/19/19 of service due to Water to Station 26 391752 pump suppling water 3/21/19 to sampler was turned off for repair.

TMU-SR-1 found Restored sampler to with power but not IMDS parameters.

collecting sample. It 6/11/19 appears the sampler Water to Station 26 395399 was not operating to 6/16/19 the Instrument Master Data Sheet (IMDS) specifications.

Station was found off Contacted utility 7/6/19 with 94 hours0.00109 days <br />0.0261 hours <br />1.554233e-4 weeks <br />3.5767e-5 months <br /> on company to update Air Sampler to Statin 48 396630 timer due to electrical contact information to 7/9/19 issue. notify REMP personnel.

2019 Annual Radiological Environmental Operating Report 5-13 Energy Northwest/Columbia Generating Station

Table 5-1D below shows the percent in service time for the 12 air sample locations. The table shows overall availability for all ODCM required locations was 99.0% or greater.

TABLE 5-1D CGS REMP Air Sample Percent in Service Time for 2019 Station ID ODCM Required EFSEC Required Percent Time in Service 1 x 99.3%

4 x x 99.9%

5 99.3%

6 x 99.9%

7 x 99.9%

8 x x 99.9%

9 x x 99.9%

21B 99.9%

23 x 99.9%

40 x x 99.9%

48 x x 99.0%

57 x 99.9%

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 99.1% or greater.

TABLE 5-1E CGS REMP Water Sample Percent in Service Time for 2019 Station ID ODCM Required EFSEC Required Percent Time in Service 26 x x 99.1%

27 x x 100.0%

29 x x 100.0%

101B x 99.0%

102B x 100.0%

2019 Annual Radiological Environmental Operating Report 5-14 Energy Northwest/Columbia Generating Station

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 similar to Table 3 of the NRC Branch Technical Position 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 analysis 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.

• Mean and range for all control locations, and the ratio of detectable measurements of 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 non-routine reported measurements.

TABLE 5-2 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2019 mR/std.

Medium: Environmental Direct Radiation (TLD) Units: quarter Location With Highest Annual Total Lower Limit of Indicator Locations Mean Control Locations Number of Analysis Type Analyses Detection Mean (f)a a Mean (f)a Nonroutine Location Mean (f)

Performed (LLD) Range Range Measurements Information Range 21.0 (223 / 223) 86 26.8 (4/4) 19.2 (4/4)

TLD Quarterly 227 --- 0 (17.3-27.8) NNW 0.3 miles (25.7-27.8) (18.6-19.7)

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

Reference Appendix A, Tables A-1.1, A-1.2 2019 Annual Radiological Environmental Operating Report 5-15 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 2019 mR/std.

Medium: ISFSI Direct Radiation (TLD) Units: quarter Location With Highest Annual Indicator Total Lower Limit Mean Control Locations Number of Locations Analysis Type Analyses of Detection Mean (f)a Nonroutine Mean (f)a Location Mean (f)a Performed (LLD) Range Measurements Range Information Range 113.5 (48 / 48) 136B 188.1 (4 / 4)

TLD Quarterly 48 --- --- (0 / 0) 0 (59.0-201.1) NNW 0.29 miles (180.0-201.1)

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

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

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2019 Medium: Air Particulate/Air Radioiodine Units: pCi/m3 Indicator Location With Highest Annual Mean Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection a Mean (f)a Nonroutine Type Mean (f)a Location Mean (f)

Performed (LLD) b Range Measurements Range Information Range 0.0198 (572/572) 57 0.0206 (52/52) 0.0190 (52/52)

Gross Beta 572 0.01 0 (0.0194-0.0206) N 0.70 miles (0.0038-0.0774) (0.0042-0.0701)

I-131 572 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.

2019 Annual Radiological Environmental Operating Report 5-16 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 2019 Medium: Water-River/Drinking Units: pCi/L Indicator Location With Highest Annual Mean Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Mean (f)a Nonroutine Type Mean (f)a Location Mean (f)a Performed (LLD) c Range Measurements Range Information Range Gross Beta 24 4.0 --- 0

--- (0/24)(b) --- --- (0 / 12)

H-3 8 2000 --- (0 / 8)(b) --- --- --- (0 / 4) 0 Mn-54 24 15 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Fe-59 24 30 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Co-58 24 15 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Co-60 24 15 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Zn-65 24 30 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Zr/Nb-95 24 15 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Cs-134 24 15 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Cs-137 24 18 --- (0 / 24) (b) --- --- --- (0 / 12) 0 Ba/La-140 24 15 --- (0 / 24) (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 2019 Annual Radiological Environmental Operating Report 5-17 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 2019 Medium: Water-Discharge Units: pCi/L Location With Highest Annual Mean Indicator Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Location Mean (f)a Mean (f)a Nonroutine Type Mean (f) a Performed (LLD) b Information Range Range Measurements Range 3.94 (8/12) 27 3.94 (8/12)

Gross Beta 12 4.0 --- (0 / 0) 0 (0.159-9.60) E 3.2 miles (0.159-9.60)

--- (0/4)

H-3 4 2000 --- --- --- (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 2019 Annual Radiological Environmental Operating Report 5-18 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 2019 Medium: Water- Deep Ground Units: pCi/L Location With Highest Annual Mean Indicator Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Location Mean (f)a Mean (f)a Nonroutine Type Mean (f)a Performed (LLD) b Information Range Range Measurements 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 2019 Annual Radiological Environmental Operating Report 5-19 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 2019 Medium: Water- Shallow Ground Units: pCi/L Location With Highest Annual Mean Indicator Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Location Mean (f)a Mean (f)a Nonroutine Type Mean (f)a Performed (LLD) b Information Range Range Measurements Range 3340(28/ 36) MW-5 12,000 (4 / 4)

H-3 36 2000 --- (0 / 0) 0 (159-12,600) SW 0.43 miles (11,500-12,600)

Mn-54 36 15 --- (0 / 36) --- --- --- (0 / 0) 0 Fe-59 36 30 --- (0 / 36) --- --- --- (0 / 0) 0 Co-58 36 15 --- (0 / 36) --- --- --- (0 / 0) 0 Co-60 36 15 --- (0 / 36) --- --- --- (0 / 0) 0 Zn-65 36 30 --- (0 / 36) --- --- --- (0 / 0) 0 Zr/Nb-95 36 15 --- (0 / 36) --- --- --- (0 / 0) 0 Cs-134 36 15 --- (0 / 36) --- --- --- (0 / 0) 0 Cs-137 36 18 --- (0 / 36) --- --- --- (0 / 0) 0 Ba/La-140 36 15 --- (0 / 36) --- --- --- (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 B-10.1, B-10.2, and B-11.1.

2019 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 2019 Medium: River Sediment Units: pCi/kg Indicator Location With Highest Annual Mean Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Mean (f)a Nonroutine Type Mean (f)a Location Mean (f) a Performed (LLD) b Range Measurements Range Information Range Cs-134 4 150 --- (0 / 2) --- --- --- (0 / 2) 0 112 (2 / 2) 34 112 (2 / 2)

Cs-137 4 180 --- (0 / 2) 0 (84.1-140) ESE 3.32 Miles (84.1-140)

--- (0 / 2)

Co-60 4 --- --- --- --- (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.

2019 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 Calender Year 2019 Medium: Roots Units: pCi/kg Indicator Location With Highest Annual Mean Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Mean (f)a Nonroutine Type Mean (f)a Location Mean (f) a Performed (LLD) b Range Measurements Range Information Range I-131 11 60 --- (0 / 8) --- --- --- (0 / 3) 0 Cs-134 11 60 --- (0 / 8) --- --- --- (0 / 3) 0 Cs-137 11 80 --- (0 / 8) --- --- --- (0 / 3) 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.

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2019 Medium: Fruits Units: pCi/kg Location With Highest Annual Mean Indicator Total Lower Limit Control Locations Number of Analysis Locations Analyses of Detection Location Mean (f)a Mean (f)a Nonroutine Type Mean (f)a Performed (LLD) b Information Range Range Measurements Range I-131 10 60 --- (0 / 7) --- --- --- (0 / 3) 0 Cs-134 10 60 --- (0 / 7) --- --- --- (0 / 3) 0 Cs-137 10 80 --- (0 / 7) --- --- --- (0 / 3) 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.

2019 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 2019 Medium: Vegetables and Vegetation Units: pCi/kg Location With Highest Annual Mean Total Lower Limit Indicator Locations Control Locations Number of Analysis Analyses of Detection Mean (f)a Location Mean (f)a Mean (f)a Nonroutine Type Performed (LLD) b Range Information Range Range Measurements I-131 14 60 --- (0 / 11) --- --- --- (0 / 3) 0 Cs-134 14 60 --- (0 / 11) --- --- --- (0 / 3) 0

--- (0 / 11)

Cs-137 14 80 --- --- --- (0 / 3) 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.

TABLE 5-2 (cont.)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

COLUMBIA GENERATING STATION DOCKET NO. 50-397 Benton County, Washington Calendar Year 2019 Medium: Fish Units: pCi/kg Location With Highest Annual Mean Total Lower Limit Indicator Locations Control Locations Number of Analysis Analyses of Detection Mean (f)a Mean (f)a Nonroutine Type Location Mean (f)a Performed (LLD) b Range Range Measurements Information Range Mn-54 6 130 --- (0 / 3) --- --- --- (0 / 3) 0 Fe-59 6 260 --- (0 / 3) --- --- --- (0 / 3) 0 Co-58 6 130 --- (0 / 3) --- --- --- (0 / 3) 0 Co-60 6 130 --- (0 / 3) --- --- --- (0 / 3) 0 Zn-65 6 260 --- (0 / 3) --- --- --- (0 / 3) 0 Cs-134 6 130 --- (0 / 3) --- --- --- (0 / 3) 0 Cs-137 6 150 --- (0 / 3) --- --- --- (0 / 3) 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.

2019 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 2019 Medium: Milk Units: pCi/L Location With Highest Annual Mean Total Lower Limit Indicator Locations Control Locations Number of Analysis Analyses of Detection Mean (f)a Mean (f)a Nonroutine Type Location Mean (f)a Performed (LLD) b Range Range Measurements Information 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.

2019 Annual Radiological Environmental Operating Report 5-24 Energy Northwest/Columbia Generating Station

TABLE 5-3 QUARTERLY TLD DATA

SUMMARY

WITH COMPARISON TO PREOPERATIONAL AND OPERATIONAL PERIODS Results in mR/Standard Quarter Pre-Operational Operational to 2018 2019 Operational Station Min Max Std Dev Mean Min Max Std Dev Mean Min Max Std Dev Mean 1 19.16 23.73 2.07 21.90 18.25 27.38 1.60 22.00 20.45 21.61 0.53 21.16 2 17.34 22.81 2.09 21.10 16.43 25.55 1.50 21.53 20.65 21.95 0.59 21.11 3 18.25 21.90 1.46 20.42 16.43 24.64 1.63 20.72 18.27 20.85 1.09 19.69 4 15.51 23.73 2.65 19.96 14.60 22.81 1.58 19.43 17.32 18.88 0.66 18.11 5 18.25 22.81 1.74 20.76 16.43 23.73 1.56 19.91 18.40 19.60 0.53 19.04 6 18.25 21.90 1.50 20.19 16.43 23.73 1.51 19.98 17.53 19.75 0.98 18.92 7 19.16 22.81 1.69 21.33 16.43 24.64 1.65 20.97 19.41 21.14 0.87 20.18 8 21.90 25.55 1.50 23.84 15.51 27.38 1.86 23.14 20.95 23.08 0.91 22.17 9 15.51 21.90 2.00 19.85 16.43 23.73 1.57 19.77 18.58 19.68 0.54 19.18 10 19.16 22.81 1.38 20.99 16.43 24.64 1.57 20.88 19.68 20.70 0.44 20.21 11 19.16 22.81 1.38 21.44 16.43 24.64 1.40 21.44 19.87 22.10 0.99 20.76 12 20.99 24.64 1.60 23.04 18.25 26.46 1.63 23.01 20.97 23.64 1.23 21.97 13 19.16 22.81 1.54 21.44 17.34 27.38 1.69 21.18 20.09 22.04 0.89 20.74 14 19.16 24.64 2.07 21.90 17.34 25.55 1.46 21.38 19.56 22.47 1.26 21.00 15 20.99 25.55 1.37 23.15 17.34 27.38 1.64 22.94 20.88 23.73 1.19 22.22 16 20.08 23.73 1.52 22.13 16.43 26.46 1.74 21.80 19.82 22.77 1.23 21.31 17 19.16 23.73 1.62 22.81 17.34 26.46 1.56 22.37 19.89 22.15 1.06 21.45 18 20.08 23.73 1.27 22.13 16.43 25.55 1.59 21.94 19.43 21.97 1.10 20.79 19 20.08 23.73 1.24 22.01 17.34 25.55 1.54 22.09 19.58 22.52 1.21 21.20 20 19.16 23.73 1.76 21.44 15.62 25.55 1.67 21.68 18.69 22.53 1.57 20.62 21 19.16 21.90 1.25 20.68 15.51 23.73 1.40 20.19 18.77 20.25 0.65 19.56 22 19.16 23.73 1.58 22.01 16.43 25.55 1.49 21.51 18.85 21.51 1.10 20.29 23 20.08 23.73 1.49 21.60 17.34 25.55 1.58 21.07 19.66 22.03 0.97 20.85 24 20.99 23.73 1.09 21.90 16.74 50.50 3.03 21.83 17.82 21.55 1.74 19.79 25 20.99 24.64 1.46 23.15 17.34 27.38 1.82 22.63 20.40 23.24 1.17 21.75 40 17.34 21.90 1.70 19.94 15.51 24.64 1.74 19.76 17.63 19.05 0.61 18.18 41 20.08 25.55 2.00 23.73 17.34 27.38 1.96 22.19 19.08 22.18 1.27 20.69 42 20.08 23.73 1.61 22.36 17.34 26.46 1.90 21.72 18.47 20.77 0.96 19.77 43 20.99 24.64 1.49 23.12 16.43 27.38 2.03 22.38 20.57 21.56 0.46 20.99 44 19.16 22.81 1.34 21.12 15.51 24.64 1.96 20.46 17.60 19.44 0.84 18.82 45 19.16 22.81 1.37 21.25 16.43 25.55 1.75 20.94 19.28 20.39 0.57 19.87 46 22.81 28.29 2.10 26.10 19.16 31.94 2.05 26.37 23.13 27.05 1.81 25.78 47 17.34 20.99 1.73 19.85 15.51 26.28 1.61 20.12 19.01 20.63 0.73 19.74 49 21.90 21.90 - 21.90 16.43 27.57 1.59 21.83 20.33 22.98 1.21 21.28 50 20.08 20.08 - 20.08 16.43 26.46 1.66 21.49 20.52 22.38 0.79 21.26 51 19.16 21.90 1.18 20.53 16.43 24.64 1.56 20.92 18.68 21.55 1.18 20.00 53 24.64 24.64 - 24.64 18.25 29.57 2.09 22.95 20.30 22.11 0.81 21.13 54 23.73 23.73 - 23.73 18.18 26.46 1.91 21.91 20.16 20.81 0.27 20.47 55 20.99 20.99 - 20.99 16.43 25.55 1.44 21.34 20.23 20.97 0.33 20.61 56 21.90 21.90 - 21.90 16.43 25.55 1.66 21.85 20.42 22.24 0.75 21.27 58 - - - - 17.83 24.35 1.45 19.82 18.70 21.89 1.41 19.87 65 - - - - 17.73 22.72 1.11 19.81 18.02 20.43 1.09 19.51 2019 Annual Radiological Environmental Operating Report 5-25 Energy Northwest/Columbia Generating Station

TABLE 5-3 (Cont.)

QUARTERLY TLD DATA

SUMMARY

WITH COMPARISON TO PREOPERATIONAL AND OPERATIONAL PERIODS Results in mR/Standard Quarter Pre-Operational Operational to 2018 2019 Operational Station Min Max Std Dev Mean Min Max Std Dev Mean Min Max Std Dev Mean 71(1S) 20.08 22.81 1.58 21.90 18.25 30.39 2.33 25.22 24.02 26.64 1.33 25.44 72(2S) 21.90 23.73 0.91 22.81 18.25 29.65 1.94 24.21 21.98 24.56 1.39 23.27 73(3S) 20.08 21.90 0.91 20.99 16.43 25.15 1.55 21.43 20.55 23.38 1.21 21.88 74(4S) 23.73 24.64 0.53 24.03 18.25 28.29 1.80 23.24 21.01 24.61 1.68 22.42 75(5S) 19.16 21.90 1.39 20.38 15.51 26.46 1.77 22.17 20.17 25.30 2.72 22.21 76(6S) 20.99 22.81 0.91 21.90 17.34 26.46 1.71 21.87 20.62 22.75 0.98 21.41 77(7S) 21.90 23.73 0.91 22.81 17.34 25.55 1.54 21.89 19.85 21.78 0.86 21.03 78(8S) 21.90 23.73 1.05 22.51 17.34 25.55 1.53 21.37 19.60 22.02 0.99 20.79 79(9S) 22.81 23.73 0.53 23.12 17.34 25.55 1.57 21.74 19.63 21.93 0.98 20.80 80(10S) 20.99 22.81 0.91 21.90 16.43 25.55 1.66 20.90 19.79 22.03 1.06 20.65 81(11S) 20.08 23.73 1.90 22.20 17.34 25.55 1.47 21.35 20.35 21.46 0.54 20.87 82(12S) 21.90 24.64 1.39 23.42 17.34 26.46 1.49 22.33 20.95 22.83 1.01 21.84 83(13S) 21.90 23.73 0.91 22.81 17.34 26.46 1.78 22.09 19.90 22.04 1.17 21.01 84(14S) 20.99 22.81 1.05 22.20 16.43 27.17 1.71 22.16 21.07 22.91 0.82 21.75 85(15S) 21.90 24.64 1.58 23.73 16.58 27.83 1.84 22.97 20.77 23.13 1.19 22.07 86(16S) 21.90 23.73 0.91 22.81 18.25 31.28 2.49 26.38 25.68 27.83 1.09 26.79 87 - - - - 19.34 34.34 3.68 28.67 - - - -

88 - - - - 17.05 31.67 3.28 25.27 22.42 27.25 2.06 25.35 89 - - - - 19.25 29.38 2.25 25.96 23.42 27.53 1.83 26.08 90 - - - - 16.79 21.02 0.83 18.99 - - - -

119B - - - - 19.24 25.64 1.40 21.96 20.42 23.77 1.46 21.66 119Ctrl - - - - 19.53 26.55 1.28 21.87 21.07 23.83 1.30 22.15 121 (ISFSI) - - - - 19.52 130.27 21.34 73.79 50.16 77.79 12.89 69.37 122 (ISFSI) - - - - 19.62 42.49 6.47 32.10 33.58 35.81 1.07 34.69 123 (ISFSI) - - - - 24.99 160.33 32.66 109.34 79.72 87.41 3.53 82.19 124 (ISFSI) - - - - 26.89 201.05 42.20 133.45 96.09 100.53 2.02 97.56 125 (ISFSI) - - - - 26.46 135.52 25.42 96.02 71.52 74.61 1.34 73.15 126 (ISFSI) - - - - 26.00 145.68 31.24 96.47 106.96 114.20 3.45 110.76 127 (ISFSI) - - - - 28.97 109.16 20.54 74.33 84.72 89.07 1.94 86.44 128 (ISFSI) - - - - 25.64 187.25 43.85 114.06 131.94 141.92 4.38 135.72 129 (ISFSI) - - - - 30.16 138.08 29.71 88.88 98.39 105.72 3.32 102.07 130 (ISFSI) - - - - 44.04 161.87 56.18 90.02 139.21 149.20 4.21 143.57 131 (ISFSI) - - - - 42.30 68.07 9.04 55.42 58.98 64.78 2.69 62.97 136A (ISFSI) - - - - 28.99 205.64 60.07 115.48 - - - -

137A (ISFSI) - - - - 29.47 324.49 82.76 139.11 - - - -

138A (ISFSI) - - - - 28.28 224.87 63.34 113.66 - - - -

136B (ISFSI) - - - - 35.48 206.85 72.24 87.51 180.03 201.06 9.06 188.11 137B (ISFSI) - - - - 37.52 198.32 67.87 84.75 172.21 191.70 8.07 182.40 138B (ISFSI) - - - - 36.88 104.19 26.31 59.94 93.56 99.99 3.24 96.67 Site 1 - - - - 11.92 20.19 1.18 18.35 19.11 19.98 0.41 19.43 Site 4 - - - - 15.70 20.24 1.02 18.55 17.33 19.52 1.07 18.65 155 - - - - 22.78 27.54 1.50 24.80 24.83 26.52 0.83 25.60 156 - - - - 24.56 29.14 1.46 27.20 26.61 29.41 1.20 28.27 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.

2019 Annual Radiological Environmental Operating Report 5-26 Energy Northwest/Columbia Generating Station

6.0 QUALITY ASSURANCE AND QUALITY CONTROL 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 Hanford External Dosimetry Program (HEDP),

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 TLD, sample collection, and sample analysis components of the REMP.

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

From the time the TLDs are annealed to the time they are placed in the field, they are stored and transported with control TLDs. Two sets of control TLDs are used, the building controls and the transportation (trip) controls. The building controls monitor the exposure that the TLDs receive while being transported to and from the TLD vendor and while in storage awaiting deployment and analysis. The trip controls accompany the field TLDs when transported to and from the vendor and also during deployment and collection in the field. The building controls and trip controls are stored in a low background lead shield while the field TLDs 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.

Reader QC dosimeters serve as checks that the dosimeter reader calibration is satisfactory and that the TLDs were processed correctly. These TLDs are annealed and then given a known exposure (typically 100 mR) to a cesium-137 source. The number of QC dosimeters used during each processing is generally 10%

of the number of field dosimeters. Evaluation of the 2019 reader QC dosimeter results indicated satisfactory agreement for all periods. The quarterly average reader QC results are presented in Table 6-1.

TLDs designated as spikes are prepared by the Energy Northwest Radiation Protection Department by exposing the TLDs 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 TLD results. Quarterly spikes receive a target exposure of 22, 40, and 50 mR. Evaluation of the 2019 spiked dosimeter results indicated satisfactory agreement for all periods. Spiked TLD results are presented in Table 6-1.

6.2 Quality Control for the Environmental Sample Program 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.

2019 Annual Radiological Environmental Operating Report 6-1 Energy Northwest/Columbia Generating Station

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.

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.

2019 Annual Radiological Environmental Operating Report 6-2 Energy Northwest/Columbia Generating Station

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 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 2019. The Laboratorys intercomparison program was further supplemented by additional cross check media provided by ERA. The Laboratorys intercomparison program results for 2019 are shown in Table 6-2. Participation in the ERA studies serves 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 The results of the fall 2019 I-131 in milk proficiency sample (RAD-118) were slightly below the acceptance limits. Investigation found no calculation, reporting, or instrumentation errors. No anomalies during preparation were noted or identified. A second I-131 in milk proficiency sample (RAD-119) was obtained and prepared by the same individual using the same procedure. Results of the RAD-119 sample were in good agreement with the known value. The cause of the low RAD-118 result was not identified. The laboratory initiated counting the I-131 source material before it is added to the milk media and also counting the waste milk after extraction in order to help identify any potential issues before reporting results.

2019 Annual Radiological Environmental Operating Report 6-3 Energy Northwest/Columbia Generating Station

TABLE 6-1 2019 ENVIRONMENTAL SPIKED DOSIMETER RESULTS KNOWN REPORTED EXPOSURE EXPOSURE PERIOD SPIKE ID (mR) (mR) BIAS (%)

1st Quarter ENW Spike 22.48 22.55 +0.3%

ENW Spike 22.48 22.91 +1.9%

ENW Spike 22.48 22.69 +0.9%

ENW Spike 22.48 22.55 +0.3%

ENW Spike 22.48 21.78 -3.1%

ENW Spike 22.48 25.18 +12.0%

HEDP Avg. Reader 100 99.1 +0.1%

2nd Quarter ENW Spike 22 21.2 -3.6%

ENW Spike 22 21.6 -1.8%

ENW Spike 22 21.3 -3.2%

ENW Spike 40 39.5 -1.3%

ENW Spike 40 39.6 -1.0%

ENW Spike 40 39.5 -1.3%

HEDP Avg. Reader 100 99.6 -0.4%

3rd Quarter ENW Spike 22 22.4 +1.6%

ENW Spike 22 21.9 -0.4%

ENW Spike 22 22.2 +0.9%

ENW Spike 50 50.6 +1.3%

ENW Spike 50 50.1 +0.3%

ENW Spike 50 51.2 +2.4%

HEDP Avg. Reader 100 99.6 -0.4%

4th Quarter ENW Spike 22 21.6 -1.8%

ENW Spike 22 22.1 +0.5%

ENW Spike 22 22.2 +0.9%

ENW Spike 40 39.3 -1.8%

ENW Spike 40 40.5 +1.2%

ENW Spike 40 40.6 +1.4%

HEDP Avg. Reader 100 99.0 -0.6%

2019 Annual Radiological Environmental Operating Report 6-4 Energy Northwest/Columbia Generating Station

TABLE 6-2 ENW REMP PROGRAM CROSS CHECK PERFORMANCE RESULTS ERA MRAD-30 Results Spring 2019 Reported Assigned Performance Standard/Analyte Units Value Value Acceptance Limits Evaluation Air Filter Radionuclides Americium-241 pCi/Filter 18 18.7 13.3 - 24.9 Acceptable Cesium-134 pCi/Filter 600 721 468 - 884 Acceptable Cesium-137 pCi/Filter 708 634 521 - 832 Acceptable Cobalt-60 pCi/Filter 96 93.8 79.7 - 119 Acceptable Manganese-54 pCi/Filter < 50 < 50.0 0.00 - 50.0 Acceptable Zinc-65 pCi/Filter 1585 1380 1130 - 2110 Acceptable Air Filter Gross Alpha/Beta Gross Alpha pCi/Filter 43.9 50.3 26.3 - 82.9 Acceptable Gross Beta pCi/Filter 75.4 78.6 47.7 - 119 Acceptable Water Radionuclides Americium-241 pCi/L 156 168 115 - 215 Acceptable Cesium-134 pCi/L 113 123 92.9 - 135 Acceptable Cesium-137 pCi/L 128 125 107 - 142 Acceptable Cobalt-60 pCi/L 1101 1100 949 - 1260 Acceptable Manganese-54 pCi/L < 100 < 100 0.00 - 100 Acceptable Zinc-65 pCi/L 1919 1780 1580 - 2250 Acceptable Water Gross Alpha/Beta Gross Alpha pCi/L 81.6 68.5 25.0 - 94.5 Acceptable Gross Beta pCi/L 129 151 75.5 - 208 Acceptable Water Tritium Tritium pCi/L 23175 23700 17900 - 28800 Acceptable Soil Radionuclides Actinium-228 pCi/kg 3169 3280 2160 - 4130 Acceptable Americium-241a pCi/kg < 500 474 256 - 671 Acceptable Bismuth-212 pCi/kg 2537 3400 973 - 5070 Acceptable Bismuth-214 pCi/kg 1432 1370 658 - 2040 Acceptable Cesium-134 pCi/kg 9614 9280 6350 - 11100 Acceptable Cesium-137 pCi/kg 1208 1030 779 - 1300 Acceptable Cobalt-60 pCi/kg 6344 5880 4630 - 7260 Acceptable Lead-212 pCi/kg 3598 3380 2360 - 4270 Acceptable Lead-214 pCi/kg 1555 1450 609 - 2280 Acceptable Manganese-54 pCi/kg < 100 < 1000 0.00 - 1000 Acceptable Potassium-40 pCi/kg 24086 24300 16700 - 29000 Acceptable Zinc-65 pCi/kg 1658 1460 1170 - 1990 Acceptable a- Assigned value was below the analysis method MDA for this isotope.

2019 Annual Radiological Environmental Operating Report 6-5 Energy Northwest/Columbia Generating Station

TABLE 6-2 (Cont.)

ENW REMP PROGRAM CROSS CHECK PERFORMANCE RESULTS ERA MRAD-31 Results Fall 2019 Reported Assigned Acceptance Performance Standard/Analyte Units Value Value Limits Evaluation Air Filter Radionuclides Cesium-134 pCi/Filter 51.6 59.0 38.3 - 72.3 Acceptable Cesium-137 pCi/Filter 488 437 359 - 573 Acceptable Cobalt-60 pCi/Filter 61.3 58.4 49.6 - 74.2 Acceptable Manganese-54 pCi/Filter < 50 < 50.0 0.00 - 50.0 Acceptable Zinc-65 pCi/Filter 411 364 298 - 556 Acceptable Air Filter Gross Alpha/Beta Gross Alpha pCi/Filter 61.7 59.0 30.8 - 97.2 Acceptable Gross Beta pCi/Filter 53.8 57.6 34.9 - 87.0 Acceptable Water Radionuclides a

Americium-241 pCi/L < 100 64.2 44.1 - 82.1 Acceptable Cesium-134 pCi/L 1755 1960 1480 - 2160 Acceptable Cesium-137 pCi/L 1866 1840 1580 - 2090 Acceptable Cobalt-60 pCi/L 1844 1870 1610 - 2150 Acceptable Manganese-54 pCi/L < 100 < 100 0.00 - 100 Acceptable Zinc-65 pCi/L 1442 1370 1220 - 1730 Acceptable Water Gross Alpha/Beta Gross Alpha pCi/L 114 124 45.3 - 171 Acceptable Gross Beta pCi/L 51.0 68.0 34.0 - 93.6 Acceptable Water Tritium Tritium pCi/L 22203 22300 16800 - 27100 Acceptable Soil Radionuclides Actinium-228 pCi/kg 3273 3170 2090 - 3990 Acceptable Americium-241 pCi/kg 2162 1920 1040 - 2720 Acceptable Bismuth-212 pCi/kg 2458 3280 939 - 4890 Acceptable Bismuth-214 pCi/kg 1335 1330 638 - 1980 Acceptable Cesium-134 pCi/kg 7308 7650 5230 - 9140 Acceptable Cesium-137 pCi/kg 1368 1230 930 - 1560 Acceptable Cobalt-60 pCi/kg 3837 3710 2920 - 4580 Acceptable Lead-212 pCi/kg 3502 3350 2340 - 4240 Acceptable Lead-214 pCi/kg 1483 1450 609 - 2280 Acceptable Manganese-54 pCi/kg < 100 < 1000 0.00 - 1000 Acceptable Potassium-40 pCi/kg 23821 24700 17000 - 29500 Acceptable Zinc-65 pCi/kg 3041 2690 2150 - 3670 Acceptable a- Assigned value was below the analysis method MDA for this isotope.

2019 Annual Radiological Environmental Operating Report 6-6 Energy Northwest/Columbia Generating Station

TABLE 6-2 (Cont)

ENW REMP PROGRAM CROSS CHECK PERFORMANCE RESULTS 2019 ERA Crosscheck Result Iodine-131 Charcoal Cartridge Acceptance Performance Sample ID Analysis Units Result Ref Value Limits Evaluation 01241901A Iodine-131 pCi/Filter 395 362 303-434 Acceptable 01241902A Iodine-131 pCi/Filter 420 373 312-447 Acceptable 2019 ERA RAD Results Iodine-131 in Milk Acceptance Performance Sample ID Analysis Units Result Ref Value Limits Evaluation RAD-118 Iodine-131 pCi/L 24.1 29.6 24.6 - 34.6 Not Acceptable RAD-119 Iodine-131 pCi/L 21.4 23.9 19.8 - 28.4 Acceptable 2019 Annual Radiological Environmental Operating Report 6-7 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/reading-rm/doc-collections/fact-sheets/.

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, "Performance, Testing and Procedural Specifications For Thermoluminescence Dosimetry-Environmental Applications," Regulatory Guide 4.13, Revision 1, July 1977.

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 Ground Water 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."

2019 Annual Radiological Environmental Operating Report 7-1 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, 2019, Hanford Site Environmental Report for Calendar Year 2018, DOE/RL-2019-33 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.

2019 Annual Radiological Environmental Operating Report 7-2 Energy Northwest/Columbia Generating Station

8.0 ERRATA 8.0 ERRATA Errors or omissions identified in previous years reports are identified below.

In the 2017 and 2018 AREOR, in Section 5.1, fourth paragraph, the number of sectors were incorrectly identified for remote stations. It should have been 13 sectors and not 16.

2019 Annual Radiological Environmental Operating Report 8-1 Energy Northwest/Columbia Generating Station

ENERGY NORTHWEST APPENDIX A 2019 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT COLUMBIA GENERATING STATION DATA TABLES A and B Sample Collection Period Calendar Year 2019 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Prepared by:

Energy Northwest - Environmental Services Staff Richland, WA

APPENDIX A - TABLE OF CONTENTS TABLE A: ROUTINE RESULTS A-1.1 2019 Quarterly TLD Results A-1.2 2019 Quarterly TLD 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 i

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 2019 Quarterly Special Interest TLD Results B-1.2 2019 Quarterly Special Interest TLD 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 Evaporation Pond Water B-13.1 Gamma Spectrometry Results of 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 ii

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 were 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.

iii

TABLE A-1.1 2019 QUARTERLY TLD RESULTS Results in milli-Roentgen (mR) per Standard Quarter Quarterly Station ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Sum 1 20.4 21.1 21.6 21.5 84.6 2 20.8 20.7 21.1 22.0 84.4 3 18.3 19.5 20.1 20.9 78.7 4 17.3 17.9 18.3 18.9 72.5 5 18.4 18.8 19.6 19.3 76.1 6 17.5 19.0 19.4 19.8 75.7 7 19.4 19.5 20.7 21.1 80.7 8 21.0 22.1 23.1 22.6 88.7 9 18.6 18.9 19.6 19.7 76.7 10 19.7 20.0 20.4 20.7 80.8 11 19.9 20.2 20.9 22.1 83.0 12 21.0 21.1 23.6 22.1 87.9 13 20.1 20.3 20.5 22.0 82.9 14 19.6 21.5 20.5 22.5 84.0 15 20.9 22.4 21.9 23.7 88.9 16 19.8 21.6 21.0 22.8 85.2 17 19.9 22.1 21.7 22.1 85.8 18 19.4 20.4 21.3 22.0 83.1 19 19.6 21.4 21.3 22.5 84.8 20 18.7 20.8 20.5 22.5 82.5 21 18.8 19.3 19.9 20.3 78.2 22 18.8 20.2 20.6 21.5 81.2 23 19.7 20.8 21.0 22.0 83.4 24 17.8 20.9 18.9 21.5 79.1 25 20.4 21.6 21.8 23.2 87.0 40 17.6 18.1 18.0 19.0 72.7 41 19.1 20.6 20.9 22.2 82.8 42 18.5 19.7 20.1 20.8 79.1 43 20.7 20.6 21.1 21.6 83.9 44 17.6 19.0 19.4 19.3 75.3 45 19.3 19.5 20.3 20.4 79.5 46 23.1 26.1 27.1 26.8 103.1 47 19.3 19.0 20.0 20.6 78.9 49 20.5 21.3 20.3 23.0 85.1 50 20.5 21.0 21.1 22.4 85.0 51 18.7 20.0 19.8 21.5 80.0 53 20.3 21.5 20.7 22.1 84.5 54 20.4 20.5 20.2 20.8 81.9 55 20.2 20.5 21.0 20.8 82.4 56 20.4 21.3 21.1 22.2 85.1 65 18.0 19.4 20.2 20.4 78.0 71 24.6 24.0 26.5 26.6 101.8 72 22.0 22.2 24.4 24.6 93.1 Page 1 of 2

TABLE A-1.1 2019 QUARTERLY TLD RESULTS Results in milli-Roentgen (mR) per Standard Quarter Quarterly Station ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Sum 73 20.6 21.4 22.2 23.4 87.5 74 21.0 21.2 22.9 24.6 89.7 75 20.2 21.2 NA 25.3 88.8 76 20.7 20.6 21.5 22.7 85.6 77 19.9 20.9 21.5 21.8 84.1 78 19.6 20.7 20.9 22.0 83.2 79 19.6 21.2 20.5 21.9 83.2 80 19.8 19.8 22.0 20.9 82.6 81 20.4 20.5 21.2 21.5 83.5 82 21.0 21.0 22.6 22.8 87.3 83 19.9 20.1 22.0 22.0 84.1 84 21.1 21.3 21.7 22.9 87.0 85 21.3 20.8 23.0 23.1 88.3 86 26.0 25.7 27.8 27.6 107.2 The TLD at Station 75 in the 3rd quarter was lost in the field.

The reported quarterly sum for this location is a normalized annual value based on the availabe 3 quarters of data.

TABLE A-1.2 2019 QUARTERLY TLD RESULTS-

SUMMARY

Results in milli-Roentgen (mR) per Standard Quarter Average Activity Activity Number of Location Activity Low High Samples Quarterly Indicator TLDs 21.0 17.3 27.8 223 Quarterly Control TLDs 19.2 18.6 19.7 4 Page 2 of 2

TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Station 01 Station 04 Station 05 Collection Period Result Error Result Error Result Error 01/02/19 - 01/08/19 1.94E-02 + 8.66E-04 1.94E-02 + 8.58E-04 2.09E-02 + 9.22E-04 01/08/19 - 01/15/19 1.90E-02 + 8.14E-04 2.02E-02 + 8.32E-04 2.19E-02 + 9.02E-04 01/15/19 - 01/22/19 2.25E-02 + 8.86E-04 2.74E-02 + 9.75E-04 2.19E-02 + 9.10E-04 01/22/19 - 01/29/19 1.56E-02 + 7.33E-04 1.60E-02 + 7.41E-04 1.39E-02 + 7.26E-04 01/29/19 - 02/06/19 2.74E-02 + 9.04E-04 2.75E-02 + 9.06E-04 2.61E-02 + 9.22E-04

• • 02/06/19 -12:04:58 02/12/19 PM 3.51E-02 + 9.64E-04 3.37E-02 + 1.15E-03 3.67E-02 + 1.27E-03

• • 02/12/19 - 02/19/19 2.19E-02 + 1.23E-03 2.95E-02 + 1.01E-03 3.15E-02 + 1.10E-03 02/19/19 - 02/26/19 3.74E-02 + 1.11E-03 3.71E-02 + 1.12E-03 3.52E-02 + 1.15E-03 02/26/19 - 03/05/19 2.51E-02 + 9.39E-04 2.65E-02 + 9.51E-04 2.77E-02 + 1.02E-03 03/05/19 - 03/12/19 2.76E-02 + 9.64E-04 2.67E-02 + 9.46E-04 2.87E-02 + 1.05E-03 03/12/19 - 03/19/19 2.11E-02 + 8.67E-04 2.24E-02 + 8.88E-04 2.14E-02 + 9.33E-04 03/19/19 - 03/26/19 1.90E-02 + 8.19E-04 2.05E-02 + 8.29E-04 1.79E-02 + 8.41E-04 03/26/19 - 04/02/19 1.38E-02 + 7.11E-04 1.17E-02 + 6.45E-04 1.32E-02 + 7.44E-04 04/02/19 - 04/09/19 8.81E-03 + 6.05E-04 9.88E-03 + 6.18E-04 9.98E-03 + 6.68E-04 04/09/19 - 04/16/19 4.64E-03 + 4.51E-04 4.74E-03 + 4.45E-04 4.44E-03 + 4.64E-04 04/16/19 - 04/23/19 1.17E-02 + 6.79E-04 1.13E-02 + 6.49E-04 8.84E-03 + 6.23E-04 04/23/19 - 04/30/19 1.97E-02 + 8.62E-04 1.87E-02 + 8.16E-04 1.72E-02 + 8.49E-04 04/30/19 - 05/07/19 1.82E-02 + 8.38E-04 1.71E-02 + 7.94E-04 1.38E-02 + 7.72E-04 05/07/19 - 05/14/19 1.82E-02 + 9.04E-04 1.75E-02 + 8.16E-04 1.80E-02 + 8.85E-04 05/14/19 - 05/21/19 7.49E-03 + 6.60E-04 7.53E-03 + 5.58E-04 8.06E-03 + 6.18E-04 05/21/19 - 05/28/19 1.13E-02 + 6.80E-04 1.32E-02 + 7.14E-04 1.13E-02 + 7.25E-04 05/28/19 - 06/04/19 2.08E-02 + 9.00E-04 1.90E-02 + 8.44E-04 2.10E-02 + 8.89E-04 06/04/19 - 06/11/19 5.32E-03 + 5.04E-04 5.38E-03 + 4.86E-04 6.16E-03 + 5.29E-04 06/11/19 - 06/18/19 1.08E-02 + 6.64E-04 1.14E-02 + 6.57E-04 1.22E-02 + 6.91E-04 06/18/19 - 06/25/19 6.15E-03 + 5.14E-04 7.36E-03 + 5.42E-04 7.57E-03 + 5.55E-04 06/25/19 - 07/02/19 1.01E-02 + 6.55E-04 1.11E-02 + 6.63E-04 1.02E-02 + 6.56E-04 07/02/19 - 07/09/19 1.14E-02 + 6.83E-04 9.90E-03 + 6.26E-04 1.17E-02 + 6.78E-04 07/09/19 - 07/16/19 1.01E-02 + 6.72E-04 9.82E-03 + 6.50E-04 9.59E-03 + 6.56E-04 07/16/19 - 07/23/19 7.24E-03 + 5.85E-04 7.50E-03 + 5.75E-04 8.00E-03 + 6.05E-04 07/23/19 - 07/30/19 1.25E-02 + 7.25E-04 1.35E-02 + 7.33E-04 1.25E-02 + 7.21E-04 07/30/19 - 08/06/19 1.44E-02 + 7.73E-04 1.33E-02 + 7.21E-04 1.51E-02 + 7.82E-04 08/06/19 - 08/13/19 1.87E-02 + 8.58E-04 1.62E-02 + 7.90E-04 1.71E-02 + 8.24E-04 08/13/19 - 08/20/19 1.49E-02 + 7.91E-04 1.14E-02 + 6.84E-04 1.53E-02 + 7.91E-04 08/20/19 - 08/27/19 1.13E-02 + 6.88E-04 1.04E-02 + 6.44E-04 1.05E-02 + 6.48E-04 08/27/19 - 09/03/19 1.75E-02 + 8.37E-04 1.73E-02 + 8.14E-04 1.89E-02 + 8.63E-04 09/03/19 - 09/10/19 1.89E-02 + 8.70E-04 1.73E-02 + 8.31E-04 1.93E-02 + 8.69E-04 09/10/19 - 09/17/19 1.06E-02 + 6.69E-04 9.87E-03 + 6.49E-04 1.00E-02 + 6.44E-04 09/17/19 - 09/24/19 9.72E-03 + 6.34E-04 9.98E-03 + 6.48E-04 6.55E-03 + 5.32E-04 09/24/19 - 10/01/19 9.26E-03 + 6.08E-04 8.57E-03 + 5.95E-04 8.30E-03 + 5.82E-04 10/01/19 - 10/08/19 1.15E-02 + 6.79E-04 1.26E-02 + 7.24E-04 1.31E-02 + 7.17E-04 10/08/19 - 10/15/19 2.70E-02 + 9.92E-04 2.75E-02 + 1.02E-03 2.95E-02 + 1.04E-03 10/15/19 - 10/22/19 1.72E-02 + 8.00E-04 1.72E-02 + 8.06E-04 1.72E-02 + 8.01E-04 10/22/19 - 10/29/19 1.28E-02 + 6.87E-04 1.27E-02 + 6.85E-04 1.23E-02 + 6.69E-04 10/29/19 - 11/05/19 5.13E-02 + 1.35E-03 5.45E-02 + 1.41E-03 5.47E-02 + 1.39E-03 11/05/19 - 11/12/19 7.65E-02 + 1.70E-03 7.83E-02 + 1.75E-03 6.87E-02 + 1.88E-03 11/12/19 - 11/19/19 3.59E-02 + 1.16E-03 3.44E-02 + 1.13E-03 3.27E-02 + 1.09E-03 11/19/19 - 11/26/19 2.33E-02 + 9.45E-04 2.50E-02 + 1.02E-03 2.08E-02 + 8.91E-04 11/26/19 - 12/03/19 3.47E-02 + 1.12E-03 3.38E-02 + 1.12E-03 3.34E-02 + 1.09E-03 12/03/19 - 12/10/19 5.55E-02 + 1.42E-03 5.85E-02 + 1.48E-03 4.97E-02 + 1.33E-03 12/10/19 - 12/17/19 1.12E-02 + 6.54E-04 1.03E-02 + 6.37E-04 8.68E-03 + 5.80E-04 12/17/19 - 12/23/19 1.98E-02 + 9.23E-04 1.62E-02 + 8.34E-04 1.57E-02 + 7.91E-04 12/23/19 - 12/31/19 2.83E-02 + 9.52E-04 2.69E-02 + 9.55E-04 2.39E-02 + 8.69E-04 Average MDA for analyses in Table A-2.1 was 9.02 E-04.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. Page 1 of 4

TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Station 06 Station 07 Station 08 Collection Period Result Error Result Error Result Error 01/02/19 - 01/08/19 1.78E-02 + 8.36E-04 1.74E-02 + 8.48E-04 1.74E-02 + 8.74E-04 01/08/19 - 01/15/19 1.92E-02 + 8.31E-04 2.13E-02 + 8.88E-04 2.16E-02 + 9.28E-04 01/15/19 - 01/22/19 2.47E-02 + 9.41E-04 2.29E-02 + 9.29E-04 2.30E-02 + 9.66E-04 01/22/19 - 01/29/19 1.35E-02 + 6.99E-04 1.46E-02 + 7.36E-04 1.45E-02 + 7.65E-04 01/29/19 - 02/06/19 2.78E-02 + 9.29E-04 2.81E-02 + 9.49E-04 2.56E-02 + 9.49E-04 02/06/19 - 02/12/19 3.42E-02 + 1.16E-03 3.40E-02 + 1.19E-03 3.51E-02 + 1.29E-03 02/12/19 - 02/19/19 3.01E-02 + 1.06E-03 2.99E-02 + 1.06E-03 3.07E-02 + 1.12E-03 02/19/19 - 02/26/19 3.67E-02 + 1.11E-03 3.90E-02 + 1.17E-03 3.57E-02 + 1.20E-03 02/26/19 - 03/05/19 2.59E-02 + 9.86E-04 2.63E-02 + 9.93E-04 2.71E-02 + 1.04E-03 03/05/19 - 03/12/19 2.73E-02 + 9.88E-04 2.70E-02 + 9.89E-04 2.60E-02 + 1.02E-03 03/12/19 - 03/19/19 2.01E-02 + 8.60E-04 2.13E-02 + 9.06E-04 2.34E-02 + 9.85E-04 03/19/19 - 03/26/19 1.93E-02 + 8.31E-04 2.26E-02 + 9.25E-04 1.79E-02 + 8.56E-04 03/26/19 - 04/02/19 1.28E-02 + 6.93E-04 1.28E-02 + 7.18E-04 1.45E-02 + 7.87E-04 04/02/19 - 04/09/19 8.51E-03 + 5.84E-04 9.47E-03 + 6.51E-04 9.14E-03 + 6.52E-04 04/09/19 - 04/16/19 5.69E-03 + 4.97E-04 5.24E-03 + 4.93E-04 6.11E-03 + 5.38E-04 04/16/19 - 04/23/19 1.16E-02 + 6.70E-04 1.12E-02 + 6.42E-04 1.11E-02 + 6.95E-04 04/23/19 - 04/30/19 1.87E-02 + 8.41E-04 1.79E-02 + 8.22E-04 1.82E-02 + 8.73E-04 04/30/19 - 05/07/19 1.69E-02 + 8.15E-04 1.77E-02 + 8.35E-04 1.72E-02 + 8.54E-04 05/07/19 - 05/14/19 1.91E-02 + 8.72E-04 1.70E-02 + 8.36E-04 1.86E-02 + 8.93E-04 05/14/19 - 05/21/19 6.34E-03 + 5.33E-04 7.03E-03 + 5.75E-04 7.25E-03 + 5.96E-04 05/21/19 - 05/28/19 1.21E-02 + 7.05E-04 1.20E-02 + 7.31E-04 1.37E-02 + 7.88E-04 05/28/19 - 06/04/19 2.09E-02 + 9.10E-04 2.05E-02 + 9.36E-04 2.03E-02 + 8.62E-04 06/04/19 - 06/11/19 6.84E-03 + 5.56E-04 6.45E-03 + 5.73E-04 7.49E-03 + 5.51E-04 06/11/19 - 06/18/19 1.09E-02 + 6.68E-04 1.10E-02 + 7.04E-04 1.05E-02 + 6.29E-04 06/18/19 - 06/25/19 7.24E-03 + 5.53E-04 6.59E-03 + 5.20E-04 6.08E-03 + 4.97E-04 06/25/19 - 07/02/19 9.54E-03 + 6.40E-04 1.15E-02 + 6.92E-04 1.02E-02 + 6.37E-04 07/02/19 - 07/09/19 1.24E-02 + 7.11E-04 1.14E-02 + 6.81E-04 1.15E-02 + 6.63E-04 07/09/19 - 07/16/19 1.03E-02 + 6.80E-04 9.06E-03 + 6.43E-04 9.44E-03 + 6.34E-04 07/16/19 - 07/23/19 6.86E-03 + 5.73E-04 7.81E-03 + 6.03E-04 8.86E-03 + 6.14E-04 07/23/19 - 07/30/19 1.14E-02 + 7.11E-04 1.23E-02 + 7.26E-04 1.31E-02 + 7.23E-04 07/30/19 - 08/06/19 1.27E-02 + 7.31E-04 1.48E-02 + 7.88E-04 1.48E-02 + 7.55E-04 08/06/19 - 08/13/19 1.79E-02 + 8.55E-04 1.69E-02 + 8.43E-04 1.25E-02 + 6.93E-04 08/13/19 - 08/20/19 1.57E-02 + 8.14E-04 1.50E-02 + 8.18E-04 1.69E-02 + 8.15E-04 08/20/19 - 08/27/19 1.12E-02 + 6.85E-04 1.11E-02 + 7.13E-04 1.14E-02 + 6.70E-04 08/27/19 - 09/03/19 2.06E-02 + 9.07E-04 1.90E-02 + 9.05E-04 1.89E-02 + 8.54E-04 09/03/19 - 09/10/19 1.89E-02 + 8.83E-04 1.95E-02 + 8.78E-04 1.99E-02 + 8.78E-04 09/10/19 - 09/17/19 1.13E-02 + 6.89E-04 1.01E-02 + 6.62E-04 9.85E-03 + 6.29E-04 09/17/19 - 09/24/19 8.70E-03 + 5.96E-04 8.60E-03 + 6.04E-04 9.20E-03 + 6.03E-04 09/24/19 - 10/01/19 9.95E-03 + 6.57E-04 8.62E-03 + 6.02E-04 1.13E-02 + 6.58E-04 10/01/19 - 10/08/19 1.27E-02 + 7.15E-04 1.30E-02 + 7.27E-04 1.22E-02 + 6.83E-04 10/08/19 - 10/15/19 2.58E-02 + 9.81E-04 2.77E-02 + 1.01E-03 2.82E-02 + 9.92E-04 10/15/19 - 10/22/19 1.75E-02 + 8.13E-04 1.68E-02 + 8.01E-04 1.74E-02 + 7.94E-04 10/22/19 - 10/29/19 1.19E-02 + 6.55E-04 1.20E-02 + 6.68E-04 1.38E-02 + 6.92E-04 10/29/19 - 11/05/19 5.53E-02 + 1.40E-03 5.60E-02 + 1.42E-03 5.75E-02 + 1.40E-03 11/05/19 - 11/12/19 7.86E-02 + 1.73E-03 7.22E-02 + 1.67E-03 6.92E-02 + 1.58E-03 11/12/19 - 11/19/19 3.64E-02 + 1.15E-03 3.57E-02 + 1.18E-03 3.26E-02 + 1.07E-03 11/19/19 - 11/26/19 2.38E-02 + 9.76E-04 2.25E-02 + 9.58E-04 2.17E-02 + 8.74E-04 11/26/19 - 12/03/19 3.25E-02 + 1.08E-03 3.28E-02 + 1.14E-03 3.40E-02 + 1.07E-03 12/03/19 - 12/10/19 5.84E-02 + 1.46E-03 5.52E-02 + 1.47E-03 5.06E-02 + 1.31E-03 12/10/19 - 12/17/19 1.30E-02 + 6.97E-04 1.22E-02 + 7.33E-04 9.77E-03 + 5.96E-04 12/17/19 - 12/23/19 1.79E-02 + 8.55E-04 1.78E-02 + 9.33E-04 1.49E-02 + 7.55E-04 12/23/19 - 12/31/19 2.87E-02 + 9.66E-04 2.59E-02 + 9.14E-04 2.60E-02 + 8.89E-04 Average MDA for analyses in Table A-2.1 was 9.02 E-04.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. Page 2 of 4

TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Station 09 Station 21B Station 23 Collection Period Result Error Result Error Result Error 01/02/19 - 01/08/19 1.54E-02 + 7.74E-04 1.86E-02 + 8.87E-04 2.17E-02 + 9.45E-04 01/08/19 - 01/15/19 1.67E-02 + 7.68E-04 2.02E-02 + 8.75E-04 2.13E-02 + 8.88E-04 01/15/19 - 01/22/19 2.31E-02 + 9.06E-04 2.64E-02 + 9.98E-04 2.63E-02 + 9.87E-04 01/22/19 - 01/29/19 1.12E-02 + 6.30E-04 1.45E-02 + 7.41E-04 1.36E-02 + 7.09E-04 01/29/19 - 02/06/19 2.48E-02 + 8.66E-04 2.75E-02 + 9.49E-04 2.85E-02 + 9.53E-04

• • 02/06/19 - 02/12/19 3.73E-02 + 1.24E-03 3.85E-02 + 1.27E-03 3.77E-02 + 1.04E-03

• • 02/12/19 - 02/19/19 3.19E-02 + 1.05E-03 3.33E-02 + 1.15E-03 2.44E-02 + 1.36E-03 02/19/19 - 02/26/19 3.31E-02 + 1.06E-03 3.54E-02 + 1.13E-03 3.57E-02 + 1.13E-03 02/26/19 - 03/05/19 2.99E-02 + 1.00E-03 2.65E-02 + 1.01E-03 2.69E-02 + 1.01E-03 03/05/19 - 03/12/19 2.87E-02 + 9.81E-04 2.89E-02 + 1.04E-03 2.85E-02 + 1.03E-03 03/12/19 - 03/19/19 1.96E-02 + 8.40E-04 2.25E-02 + 9.49E-04 2.08E-02 + 9.04E-04 03/19/19 - 03/26/19 2.11E-02 + 8.62E-04 2.02E-02 + 8.94E-04 1.73E-02 + 8.17E-04 03/26/19 - 04/02/19 1.22E-02 + 6.72E-04 1.35E-02 + 7.50E-04 1.51E-02 + 7.80E-04 04/02/19 - 04/09/19 6.99E-03 + 5.45E-04 9.78E-03 + 6.62E-04 8.86E-03 + 6.36E-04 04/09/19 - 04/16/19 4.19E-03 + 4.33E-04 5.58E-03 + 5.16E-04 5.28E-03 + 4.98E-04 04/16/19 - 04/23/19 9.87E-03 + 6.34E-04 1.13E-02 + 6.55E-04 1.11E-02 + 6.58E-04 04/23/19 - 04/30/19 1.86E-02 + 8.44E-04 1.90E-02 + 8.46E-04 1.88E-02 + 8.25E-04 04/30/19 - 05/07/19 1.64E-02 + 7.97E-04 1.76E-02 + 8.23E-04 1.69E-02 + 7.94E-04 05/07/19 - 05/14/19 1.72E-02 + 8.27E-04 1.82E-02 + 8.41E-04 1.72E-02 + 8.12E-04 05/14/19 - 05/21/19 7.09E-03 + 5.55E-04 6.62E-03 + 5.47E-04 7.05E-03 + 5.43E-04 05/21/19 - 05/28/19 1.14E-02 + 6.89E-04 1.23E-02 + 7.05E-04 1.13E-02 + 6.70E-04 05/28/19 - 06/04/19 2.05E-02 + 9.11E-04 2.08E-02 + 8.97E-04 2.19E-02 + 9.08E-04 06/04/19 - 06/11/19 6.49E-03 + 5.57E-04 7.34E-03 + 5.68E-04 6.11E-03 + 5.18E-04 06/11/19 - 06/18/19 1.11E-02 + 6.89E-04 1.12E-02 + 6.75E-04 1.20E-02 + 6.81E-04 06/18/19 - 06/25/19 7.30E-03 + 5.68E-04 6.31E-03 + 5.22E-04 6.32E-03 + 5.12E-04 06/25/19 - 07/02/19 9.77E-03 + 6.74E-04 1.01E-02 + 6.59E-04 1.06E-02 + 6.58E-04 07/02/19 - 07/09/19 1.12E-02 + 6.98E-04 1.10E-02 + 6.66E-04 1.13E-02 + 6.64E-04 07/09/19 - 07/16/19 6.92E-03 + 5.62E-04 9.95E-03 + 6.66E-04 8.86E-03 + 6.25E-04 07/16/19 - 07/23/19 9.59E-03 + 6.34E-04 8.59E-03 + 6.22E-04 7.58E-03 + 5.82E-04 07/23/19 - 07/30/19 1.17E-02 + 6.95E-04 1.35E-02 + 7.53E-04 1.01E-02 + 6.53E-04 07/30/19 - 08/06/19 1.33E-02 + 7.29E-04 1.48E-02 + 7.73E-04 1.24E-02 + 6.99E-04 08/06/19 - 08/13/19 1.76E-02 + 8.21E-04 1.69E-02 + 8.18E-04 1.82E-02 + 8.30E-04 08/13/19 - 08/20/19 1.41E-02 + 7.58E-04 1.62E-02 + 8.16E-04 1.41E-02 + 7.49E-04 08/20/19 - 08/27/19 1.16E-02 + 6.91E-04 1.25E-02 + 7.13E-04 9.77E-03 + 6.24E-04 08/27/19 - 09/03/19 1.89E-02 + 8.68E-04 2.04E-02 + 8.92E-04 1.87E-02 + 8.37E-04 09/03/19 - 09/10/19 1.68E-02 + 8.36E-04 1.95E-02 + 8.82E-04 1.91E-02 + 8.55E-04 09/10/19 - 09/17/19 9.26E-03 + 6.39E-04 1.14E-02 + 6.92E-04 9.84E-03 + 6.33E-04 09/17/19 - 09/24/19 9.22E-03 + 6.26E-04 9.43E-03 + 6.25E-04 8.53E-03 + 5.88E-04 09/24/19 - 10/01/19 8.24E-03 + 6.03E-04 1.14E-02 + 6.14E-04 8.54E-03 + 5.91E-04 10/01/19 - 10/08/19 1.24E-02 + 7.32E-04 1.41E-02 + 7.45E-04 1.32E-02 + 7.33E-04 10/08/19 - 10/15/19 2.54E-02 + 1.00E-03 2.95E-02 + 1.04E-03 2.75E-02 + 1.02E-03 10/15/19 - 10/22/19 1.56E-02 + 8.14E-04 1.70E-02 + 7.95E-04 1.88E-02 + 8.71E-04 10/22/19 - 10/29/19 1.35E-02 + 7.36E-04 1.43E-02 + 7.29E-04 1.37E-02 + 7.39E-04 10/29/19 - 11/05/19 4.61E-02 + 1.33E-03 5.32E-02 + 1.39E-03 5.56E-02 + 1.46E-03 11/05/19 - 11/12/19 7.01E-02 + 1.71E-03 7.37E-02 + 1.65E-03 7.72E-02 + 1.79E-03 11/12/19 - 11/19/19 3.63E-02 + 1.25E-03 3.28E-02 + 1.10E-03 3.34E-02 + 1.19E-03 11/19/19 - 11/26/19 2.12E-02 + 8.82E-04 2.29E-02 + 9.30E-04 2.35E-02 + 9.22E-04 11/26/19 - 12/03/19 3.52E-02 + 1.11E-03 3.50E-02 + 1.12E-03 3.35E-02 + 1.08E-03 12/03/19 - 12/10/19 5.39E-02 + 1.38E-03 5.65E-02 + 1.43E-03 5.57E-02 + 1.40E-03 12/10/19 - 12/17/19 7.57E-03 + 5.48E-04 1.09E-02 + 6.39E-04 1.20E-02 + 6.66E-04 12/17/19 - 12/23/19 1.31E-02 + 7.37E-04 1.89E-02 + 8.71E-04 1.89E-02 + 8.72E-04 12/23/19 - 12/31/19 2.72E-02 + 9.46E-04 2.82E-02 + 9.46E-04 2.73E-02 + 9.36E-04 Average MDA for analyses in Table A-2.1 was 9.02 E-04.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. Page 3 of 4

TABLE A-2.1 GROSS BETA ON AIR PARTICULATE FILTERS Results in pCi per Cubic Meter Station 40 Station 48 Station 57 Collection Period Result Error Result Error Result Error 01/02/19 - 01/08/19 2.01E-02 + 8.91E-04 1.91E-02 + 8.74E-04 1.78E-02 + 8.43E-04 01/08/19 - 01/15/19 2.04E-02 + 8.60E-04 2.25E-02 + 9.00E-04 2.04E-02 + 8.57E-04 01/15/19 - 01/22/19 2.49E-02 + 9.58E-04 2.37E-02 + 9.24E-04 2.43E-02 + 9.47E-04 01/22/19 - 01/29/19 1.48E-02 + 7.38E-04 1.54E-02 + 7.43E-04 1.45E-02 + 7.30E-04 01/29/19 - 02/06/19 2.67E-02 + 9.20E-04 2.69E-02 + 9.15E-04 2.88E-02 + 9.58E-04 02/06/19 - 02/12/19 3.41E-02 + 1.19E-03 3.83E-02 + 1.26E-03 3.78E-02 + 1.25E-03 02/12/19 - 02/19/19 3.19E-02 + 1.07E-03 3.07E-02 + 1.05E-03 3.10E-02 + 1.09E-03 02/19/19 - 02/26/19 3.55E-02 + 1.12E-03 3.80E-02 + 1.16E-03 3.90E-02 + 1.17E-03 02/26/19 - 03/05/19 2.89E-02 + 1.01E-03 2.61E-02 + 9.54E-04 2.64E-02 + 9.82E-04 03/05/19 - 03/12/19 2.73E-02 + 9.89E-04 2.95E-02 + 1.02E-03 2.89E-02 + 9.87E-04 03/12/19 - 03/19/19 1.97E-02 + 8.61E-04 2.08E-02 + 8.79E-04 2.18E-02 + 8.84E-04 03/19/19 - 03/26/19 1.89E-02 + 8.38E-04 1.84E-02 + 8.26E-04 2.04E-02 + 8.59E-04 03/26/19 - 04/02/19 1.38E-02 + 7.30E-04 1.42E-02 + 7.45E-04 1.64E-02 + 7.84E-04 04/02/19 - 04/09/19 8.12E-03 + 5.95E-04 8.70E-03 + 6.08E-04 8.33E-03 + 5.91E-04 04/09/19 - 04/16/19 3.77E-03 + 4.23E-04 4.92E-03 + 4.65E-04 3.83E-03 + 4.19E-04 04/16/19 - 04/23/19 1.06E-02 + 6.53E-04 1.06E-02 + 6.51E-04 1.03E-02 + 6.32E-04 04/23/19 - 04/30/19 1.72E-02 + 8.13E-04 1.68E-02 + 8.08E-04 1.62E-02 + 7.82E-04 04/30/19 - 05/07/19 1.79E-02 + 8.39E-04 1.82E-02 + 8.50E-04 1.61E-02 + 8.00E-04 05/07/19 - 05/14/19 1.81E-02 + 8.55E-04 1.81E-02 + 8.59E-04 1.68E-02 + 8.35E-04 05/14/19 - 05/21/19 6.91E-03 + 5.61E-04 6.93E-03 + 5.64E-04 7.67E-03 + 5.95E-04 05/21/19 - 05/28/19 1.20E-02 + 7.15E-04 1.20E-02 + 7.11E-04 1.22E-02 + 6.98E-04 05/28/19 - 06/04/19 1.99E-02 + 8.94E-04 1.96E-02 + 8.89E-04 2.02E-02 + 8.90E-04 06/04/19 - 06/11/19 6.45E-03 + 5.55E-04 6.30E-03 + 5.49E-04 6.99E-03 + 5.57E-04 06/11/19 - 06/18/19 1.14E-02 + 6.93E-04 1.07E-02 + 6.79E-04 1.15E-02 + 6.88E-04 06/18/19 - 06/25/19 8.26E-03 + 5.99E-04 8.33E-03 + 5.81E-04 7.02E-03 + 5.50E-04 06/25/19 - 07/02/19 1.07E-02 + 6.70E-04 1.10E-02 + 6.87E-04 1.18E-02 + 7.16E-04 07/02/19 - 07/09/19 1.02E-02 + 6.44E-04 1.04E-02 + 9.02E-04 1.04E-02 + 6.63E-04 07/09/19 - 07/16/19 8.55E-03 + 6.24E-04 8.94E-03 + 6.38E-04 1.07E-02 + 6.99E-04 07/16/19 - 07/23/19 9.90E-03 + 6.59E-04 7.47E-03 + 6.03E-04 8.29E-03 + 6.26E-04 07/23/19 - 07/30/19 1.38E-02 + 7.57E-04 1.27E-02 + 7.48E-04 1.20E-02 + 7.31E-04 07/30/19 - 08/06/19 1.53E-02 + 7.88E-04 1.42E-02 + 7.71E-04 1.51E-02 + 8.08E-04 08/06/19 - 08/13/19 1.68E-02 + 8.24E-04 1.83E-02 + 8.67E-04 1.89E-02 + 8.90E-04 08/13/19 - 08/20/19 1.49E-02 + 7.89E-04 1.59E-02 + 8.26E-04 1.57E-02 + 8.34E-04 08/20/19 - 08/27/19 1.15E-02 + 6.88E-04 1.12E-02 + 6.96E-04 1.15E-02 + 7.20E-04 08/27/19 - 09/03/19 1.94E-02 + 8.81E-04 1.94E-02 + 8.98E-04 1.89E-02 + 9.10E-04 09/03/19 - 09/10/19 1.67E-02 + 8.25E-04 2.05E-02 + 9.28E-04 1.86E-02 + 8.42E-04 09/10/19 - 09/17/19 1.11E-02 + 6.75E-04 8.95E-03 + 6.43E-04 9.85E-03 + 6.34E-04 09/17/19 - 09/24/19 8.34E-03 + 5.91E-04 9.47E-03 + 6.48E-04 1.07E-02 + 6.54E-04 09/24/19 - 10/01/19 9.20E-03 + 6.11E-04 9.75E-03 + 6.58E-04 8.04E-03 + 5.67E-04 10/01/19 - 10/08/19 1.23E-02 + 7.01E-04 1.49E-02 + 8.04E-04 1.45E-02 + 7.51E-04 10/08/19 - 10/15/19 2.85E-02 + 1.02E-03 3.05E-02 + 1.11E-03 2.86E-02 + 1.02E-03 10/15/19 - 10/22/19 1.86E-02 + 8.36E-04 1.79E-02 + 8.71E-04 1.93E-02 + 8.58E-04 10/22/19 - 10/29/19 1.33E-02 + 6.93E-04 1.27E-02 + 7.19E-04 1.34E-02 + 7.08E-04 10/29/19 - 11/05/19 5.75E-02 + 1.43E-03 5.60E-02 + 1.48E-03 5.72E-02 + 1.44E-03 11/05/19 - 11/12/19 6.95E-02 + 1.61E-03 7.13E-02 + 1.73E-03 7.74E-02 + 1.75E-03 11/12/19 - 11/19/19 3.19E-02 + 1.07E-03 3.56E-02 + 1.23E-03 3.56E-02 + 1.21E-03 11/19/19 - 11/26/19 2.19E-02 + 9.07E-04 2.31E-02 + 9.18E-04 2.25E-02 + 9.70E-04 11/26/19 - 12/03/19 3.47E-02 + 1.11E-03 3.53E-02 + 1.11E-03 3.54E-02 + 1.20E-03 12/03/19 - 12/10/19 5.07E-02 + 1.34E-03 5.43E-02 + 1.39E-03 6.04E-02 + 1.59E-03 12/10/19 - 12/17/19 1.08E-02 + 6.30E-04 1.00E-02 + 6.18E-04 1.20E-02 + 6.82E-04 12/17/19 - 12/23/19 1.72E-02 + 8.20E-04 1.75E-02 + 8.48E-04 1.88E-02 + 9.26E-04 12/23/19 - 12/31/19 2.48E-02 + 8.87E-04 2.67E-02 + 9.35E-04 2.85E-02 + 1.02E-03 Average MDA for analyses in Table A-2.1 was 9.02 E-04.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. Page 4 of 4

TABLE A-2.2 GROSS BETA ON AIR PARTICULATE FILTERS -

SUMMARY

Results in pCi per cubic meter Number Number of Average Activity Activity of Positive LOCATION Activity Low High Samples IDs Gross Beta Indicators 2.00E-02 3.77E-03 7.86E-02 572 572 Gross Beta Controls 1.90E-02 4.19E-03 7.01E-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 2019 Location and Quarter Station 1 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.10E-01 + 1.60E-02 9.44E-03 BE-7 + 1.36E-01 + 1.80E-02 9.43E-03 K-40 4.25E-03 + 5.04E-03 1.41E-02 K-40 -8.48E-05 + 9.87E-03 1.47E-02 MN-54 -7.68E-05 + 7.14E-04 1.00E-03 MN-54 -6.56E-04 + 1.11E-03 1.48E-03 FE-59 0.00E+00 + 1.71E-03 8.40E-03 FE-59 1.63E-03 + 2.82E-03 3.81E-03 CO-60 4.47E-04 + 3.38E-04 4.71E-04 CO-60 -5.67E-05 + 9.04E-04 1.28E-03 ZN-65 7.29E-04 + 5.96E-04 8.95E-04 ZN-65 5.38E-04 + 2.14E-03 2.95E-03 ZRNB-95 0.00E+00 + 4.69E-04 2.94E-03 ZRNB-95 -7.72E-04 + 2.31E-03 3.29E-03 CS-134 0.00E+00 + 1.31E-04 9.44E-04 CS-134 3.63E-05 + 6.68E-04 9.76E-04 CS-137 4.80E-04 + 3.93E-04 8.54E-04 CS-137 1.75E-04 + 7.59E-04 1.10E-03 BALA140 0.00E+00 + 2.26E-03 2.45E-02 BALA140 6.50E-03 + 1.07E-02 1.40E-02 RU-106 7.01E-04 + 4.73E-03 7.06E-03 RU-106 7.77E-04 + 6.51E-03 9.54E-03 Location and Quarter Station 1 3rd Q 2019 Location and Quarter Station 1 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.50E-01 + 2.25E-02 1.46E-02 BE-7 + 7.02E-02 + 1.16E-02 7.81E-03 K-40 9.19E-03 + 8.36E-03 1.11E-02 K-40 2.49E-03 + 6.15E-03 9.83E-03 MN-54 -3.30E-04 + 8.89E-04 1.23E-03 MN-54 -3.58E-05 + 4.42E-04 6.74E-04 FE-59 -1.48E-03 + 5.05E-03 7.03E-03 FE-59 1.10E-03 + 1.94E-03 2.69E-03 CO-60 -1.99E-04 + 9.29E-04 1.28E-03 CO-60 -1.74E-04 + 6.16E-04 9.11E-04 ZN-65 1.14E-04 + 1.72E-03 2.50E-03 ZN-65 -3.57E-04 + 1.28E-03 1.82E-03 ZRNB-95 4.88E-04 + 2.06E-03 3.06E-03 ZRNB-95 -1.85E-04 + 1.29E-03 1.92E-03 CS-134 -5.60E-04 + 9.95E-04 1.36E-03 CS-134 -2.50E-04 + 6.03E-04 8.65E-04 CS-137 2.61E-04 + 7.50E-04 1.07E-03 CS-137 2.65E-04 + 5.48E-04 7.67E-04 BALA140 8.66E-03 + 3.25E-02 4.64E-02 BALA140 -1.28E-02 + 1.96E-02 2.48E-02 RU-106 -4.84E-03 + 1.01E-02 1.40E-02 RU-106 -2.83E-03 + 5.50E-03 7.87E-03 Location and Quarter Station 4 1st Q 2019 Location and Quarter Station 4 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 8.63E-02 + 1.44E-02 1.04E-02 BE-7 + 1.13E-01 + 1.58E-02 9.05E-03 K-40 6.79E-03 + 7.10E-03 8.34E-03 K-40 1.10E-03 + 1.15E-02 1.62E-02 MN-54 -3.02E-05 + 6.97E-04 9.86E-04 MN-54 1.89E-05 + 8.73E-04 1.25E-03 FE-59 2.08E-03 + 1.58E-03 2.19E-03 FE-59 -2.45E-04 + 3.92E-03 5.53E-03 CO-60 2.52E-04 + 2.52E-04 4.63E-04 CO-60 2.50E-04 + 7.26E-04 1.00E-03 ZN-65 9.57E-04 + 6.77E-04 1.91E-03 ZN-65 -2.00E-04 + 1.75E-03 2.48E-03 ZRNB-95 1.92E-04 + 1.67E-03 2.42E-03 ZRNB-95 1.32E-03 + 1.08E-03 2.47E-03 CS-134 0.00E+00 + 9.11E-05 7.75E-04 CS-134 1.35E-04 + 6.63E-04 9.51E-04 CS-137 0.00E+00 + 2.20E-04 8.97E-04 CS-137 -4.99E-04 + 1.03E-03 1.42E-03 BALA140 0.00E+00 + 3.16E-03 2.42E-02 BALA140 -1.77E-03 + 1.24E-02 1.72E-02 RU-106 1.90E-03 + 4.26E-03 6.15E-03 RU-106 -3.25E-03 + 6.94E-03 9.71E-03 Location and Quarter Station 4 3rd Q 2019 Location and Quarter Station 4 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.50E-01 + 1.84E-02 7.85E-03 BE-7 + 6.60E-02 + 1.12E-02 7.16E-03 K-40 2.97E-03 + 8.26E-03 1.22E-02 K-40 4.35E-03 + 7.69E-03 1.14E-02 MN-54 -3.84E-05 + 5.78E-04 8.62E-04 MN-54 -3.72E-05 + 5.13E-04 7.73E-04 FE-59 6.69E-05 + 3.28E-03 4.97E-03 FE-59 7.99E-04 + 2.59E-03 3.71E-03 CO-60 -7.87E-05 + 6.23E-04 9.46E-04 CO-60 2.39E-04 + 2.80E-04 4.17E-04 ZN-65 -2.66E-04 + 1.20E-03 1.75E-03 ZN-65 -3.14E-04 + 1.60E-03 2.27E-03 ZRNB-95 -7.06E-04 + 2.11E-03 3.00E-03 ZRNB-95 -4.81E-04 + 1.38E-03 2.00E-03 CS-134 -1.44E-04 + 5.60E-04 8.20E-04 CS-134 -2.07E-04 + 6.22E-04 8.99E-04 CS-137 1.88E-04 + 4.69E-04 6.92E-04 CS-137 6.37E-05 + 5.58E-04 8.40E-04 BALA140 9.92E-03 + 2.39E-02 3.37E-02 BALA140 -5.80E-03 + 1.35E-02 1.80E-02 RU-106 -3.49E-04 + 4.81E-03 7.32E-03 RU-106 -3.19E-03 + 6.02E-03 8.59E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/2/19 to 4/2/19 - 2nd Q 4/2/19 to 7/2/19 - 3rd Q 7/2/19 to 10/1/19 - 4th Q 10/1/19 to 12/31/19 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 2019 Location and Quarter Station 5 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.15E-01 + 1.72E-02 1.07E-02 BE-7 + 1.27E-01 + 1.90E-02 1.39E-02 K-40 + 1.47E-02 + 6.44E-03 5.16E-03 K-40 7.96E-03 + 8.30E-03 1.14E-02 MN-54 0.00E+00 + 3.79E-04 1.10E-03 MN-54 -1.76E-04 + 9.12E-04 1.28E-03 FE-59 2.33E-03 + 1.76E-03 2.45E-03 FE-59 -2.69E-04 + 4.29E-03 6.06E-03 CO-60 1.17E-05 + 6.13E-04 9.10E-04 CO-60 -2.45E-04 + 1.08E-03 1.47E-03 ZN-65 6.68E-05 + 1.11E-03 1.68E-03 ZN-65 8.93E-04 + 1.51E-03 2.03E-03 ZRNB-95 7.10E-04 + 1.70E-03 2.39E-03 ZRNB-95 -5.24E-04 + 2.18E-03 3.15E-03 CS-134 7.20E-05 + 5.90E-04 8.66E-04 CS-134 -5.91E-04 + 1.05E-03 1.43E-03 CS-137 0.00E+00 + 2.74E-04 1.00E-03 CS-137 2.67E-04 + 7.50E-04 1.07E-03 BALA140 0.00E+00 + 2.50E-03 2.71E-02 BALA140 4.86E-04 + 1.33E-02 1.89E-02 RU-106 -1.93E-04 + 5.71E-03 8.57E-03 RU-106 -3.16E-03 + 8.53E-03 1.20E-02 Location and Quarter Station 5 3rd Q 2019 Location and Quarter Station 5 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.54E-01 + 2.24E-02 1.33E-02 BE-7 + 6.57E-02 + 1.12E-02 7.30E-03 K-40 3.32E-04 + 8.32E-03 1.28E-02 K-40 -2.81E-04 + 8.63E-03 1.30E-02 MN-54 -2.95E-04 + 9.99E-04 1.38E-03 MN-54 3.65E-05 + 5.03E-04 7.57E-04 FE-59 2.28E-03 + 3.95E-03 5.34E-03 FE-59 1.13E-03 + 1.99E-03 2.76E-03 CO-60 1.68E-04 + 5.55E-04 8.09E-04 CO-60 -2.99E-04 + 7.37E-04 1.04E-03 ZN-65 -6.47E-04 + 2.03E-03 2.80E-03 ZN-65 3.08E-04 + 1.30E-03 1.86E-03 ZRNB-95 4.86E-04 + 2.28E-03 3.36E-03 ZRNB-95 2.83E-04 + 1.20E-03 1.78E-03 CS-134 -2.54E-04 + 9.06E-04 1.27E-03 CS-134 -2.08E-05 + 4.93E-04 7.42E-04 CS-137 -4.29E-05 + 7.14E-04 1.05E-03 CS-137 -3.12E-05 + 3.88E-04 6.08E-04 BALA140 5.73E-03 + 4.56E-02 6.36E-02 BALA140 -1.77E-03 + 1.27E-02 1.77E-02 RU-106 -4.32E-03 + 8.57E-03 1.19E-02 RU-106 9.42E-04 + 2.81E-03 4.33E-03 Location and Quarter Station 6 1st Q 2019 Location and Quarter Station 6 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.25E-01 + 1.67E-02 8.38E-03 BE-7 + 1.28E-01 + 1.60E-02 1.06E-02 K-40 4.37E-03 + 9.18E-03 1.16E-02 K-40 -1.75E-03 + 6.81E-03 1.14E-02 MN-54 2.21E-04 + 5.52E-04 7.67E-04 MN-54 -1.11E-04 + 6.10E-04 8.89E-04 FE-59 1.61E-03 + 3.06E-03 4.04E-03 FE-59 -1.43E-03 + 3.85E-03 5.22E-03 CO-60 6.57E-04 + 4.16E-04 1.05E-03 CO-60 2.39E-04 + 4.50E-04 6.59E-04 ZN-65 0.00E+00 + 2.50E-04 2.48E-03 ZN-65 5.83E-05 + 9.06E-04 1.41E-03 ZRNB-95 -2.82E-04 + 1.76E-03 2.53E-03 ZRNB-95 0.00E+00 + 0.00E+00 2.24E-03 CS-134 -1.35E-04 + 5.60E-04 8.11E-04 CS-134 2.01E-04 + 4.50E-04 6.53E-04 CS-137 -1.62E-04 + 7.25E-04 1.02E-03 CS-137 -1.21E-04 + 5.63E-04 8.38E-04 BALA140 0.00E+00 + 3.32E-03 2.54E-02 BALA140 1.53E-03 + 9.07E-03 1.29E-02 RU-106 2.17E-03 + 3.80E-03 5.43E-03 RU-106 -6.78E-04 + 5.44E-03 8.11E-03 Location and Quarter Station 6 3rd Q 2019 Location and Quarter Station 6 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.42E-01 + 2.15E-02 1.29E-02 BE-7 + 6.42E-02 + 1.20E-02 9.01E-03 K-40 2.77E-03 + 1.04E-02 1.48E-02 K-40 6.85E-03 + 5.90E-03 8.84E-03 MN-54 -4.23E-04 + 1.10E-03 1.50E-03 MN-54 -3.67E-05 + 5.53E-04 8.24E-04 FE-59 9.52E-05 + 6.03E-03 8.58E-03 FE-59 -1.19E-03 + 3.75E-03 5.16E-03 CO-60 2.02E-04 + 7.82E-04 1.10E-03 CO-60 -1.78E-04 + 6.30E-04 9.32E-04 ZN-65 5.50E-04 + 1.82E-03 2.55E-03 ZN-65 7.56E-04 + 8.31E-04 1.07E-03 ZRNB-95 3.33E-04 + 1.82E-03 2.78E-03 ZRNB-95 1.18E-03 + 1.09E-03 1.39E-03 CS-134 -4.11E-04 + 8.28E-04 1.15E-03 CS-134 8.31E-05 + 3.74E-04 5.66E-04 CS-137 1.77E-04 + 7.67E-04 1.11E-03 CS-137 2.17E-04 + 4.92E-04 7.19E-04 BALA140 5.07E-03 + 3.38E-02 4.98E-02 BALA140 -9.00E-03 + 1.90E-02 2.48E-02 RU-106 -1.23E-03 + 8.40E-03 1.21E-02 RU-106 -2.57E-03 + 5.50E-03 7.92E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/2/19 to 4/2/19 - 2nd Q 4/2/19 to 7/2/19 - 3rd Q 7/2/19 to 10/1/19 - 4th Q 10/1/19 to 12/31/19 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 2019 Location and Quarter Station 7 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 8.86E-02 + 1.51E-02 1.03E-02 BE-7 + 1.27E-01 + 1.84E-02 1.17E-02 K-40 5.21E-03 + 9.62E-03 1.20E-02 K-40 4.86E-04 + 1.01E-02 1.49E-02 MN-54 0.00E+00 + 9.85E-05 6.02E-04 MN-54 -2.06E-05 + 8.89E-04 1.28E-03 FE-59 -8.10E-04 + 4.98E-03 6.62E-03 FE-59 2.01E-04 + 4.91E-03 6.82E-03 CO-60 2.84E-04 + 6.55E-04 8.84E-04 CO-60 -2.72E-04 + 9.47E-04 1.29E-03 ZN-65 1.30E-04 + 1.52E-03 2.17E-03 ZN-65 -1.47E-03 + 2.64E-03 3.46E-03 ZRNB-95 4.60E-04 + 1.85E-03 2.63E-03 ZRNB-95 9.12E-04 + 2.06E-03 2.93E-03 CS-134 1.92E-04 + 5.40E-04 7.76E-04 CS-134 -4.74E-04 + 8.48E-04 1.17E-03 CS-137 0.00E+00 + 2.38E-04 1.06E-03 CS-137 -1.33E-04 + 7.78E-04 1.13E-03 BALA140 -6.11E-04 + 1.20E-02 1.67E-02 BALA140 -6.30E-03 + 1.95E-02 2.53E-02 RU-106 -1.87E-03 + 7.18E-03 1.03E-02 RU-106 -2.75E-03 + 7.48E-03 1.06E-02 Location and Quarter Station 7 3rd Q 2019 Location and Quarter Station 7 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.77E-01 + 2.52E-02 1.60E-02 BE-7 + 6.10E-02 + 1.23E-02 9.92E-03 K-40 4.45E-03 + 1.20E-02 1.65E-02 K-40 9.14E-03 + 8.45E-03 1.16E-02 MN-54 -2.64E-04 + 1.10E-03 1.53E-03 MN-54 3.26E-04 + 5.68E-04 7.95E-04 FE-59 8.79E-04 + 5.21E-03 7.43E-03 FE-59 0.00E+00 + 5.42E-04 2.00E-03 CO-60 -5.41E-04 + 1.14E-03 1.49E-03 CO-60 -1.33E-04 + 6.50E-04 9.73E-04 ZN-65 -8.83E-04 + 2.38E-03 3.23E-03 ZN-65 -9.92E-04 + 2.07E-03 2.81E-03 ZRNB-95 0.00E+00 + 3.67E-04 3.83E-03 ZRNB-95 -1.03E-03 + 2.08E-03 2.90E-03 CS-134 2.36E-04 + 4.43E-04 6.33E-04 CS-134 -7.05E-05 + 5.43E-04 8.06E-04 CS-137 -1.34E-04 + 6.31E-04 9.30E-04 CS-137 2.51E-04 + 5.38E-04 7.81E-04 BALA140 -1.96E-02 + 6.23E-02 8.22E-02 BALA140 -4.08E-03 + 1.39E-02 1.94E-02 RU-106 4.16E-04 + 7.37E-03 1.08E-02 RU-106 2.42E-03 + 5.14E-03 7.44E-03 Location and Quarter Station 8 1st Q 2019 Location and Quarter Station 8 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.01E-01 + 1.39E-02 7.21E-03 BE-7 + 1.33E-01 + 1.61E-02 9.43E-03 K-40 1.08E-02 + 7.01E-03 1.53E-02 K-40 6.58E-03 + 8.18E-03 1.17E-02 MN-54 1.79E-04 + 5.17E-04 7.35E-04 MN-54 -4.09E-04 + 7.02E-04 9.71E-04 FE-59 3.92E-04 + 2.23E-03 3.30E-03 FE-59 1.47E-03 + 1.20E-03 1.81E-03 CO-60 5.49E-05 + 6.43E-04 9.17E-04 CO-60 1.19E-04 + 4.34E-04 6.79E-04 ZN-65 -2.61E-04 + 1.42E-03 2.00E-03 ZN-65 -3.80E-04 + 1.36E-03 1.94E-03 ZRNB-95 -2.03E-04 + 1.37E-03 2.04E-03 ZRNB-95 1.92E-04 + 1.33E-03 1.99E-03 CS-134 2.40E-04 + 5.20E-04 7.29E-04 CS-134 -3.85E-04 + 6.88E-04 9.72E-04 CS-137 8.50E-05 + 4.03E-04 6.06E-04 CS-137 -1.83E-04 + 6.13E-04 9.01E-04 BALA140 -2.33E-03 + 1.34E-02 1.77E-02 BALA140 -1.05E-03 + 9.25E-03 1.33E-02 RU-106 -9.10E-04 + 5.00E-03 7.30E-03 RU-106 -1.69E-03 + 6.34E-03 9.24E-03 Location and Quarter Station 8 3rd Q 2019 Location and Quarter Station 8 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.80E-01 + 2.34E-02 1.22E-02 BE-7 + 5.81E-02 + 1.07E-02 7.65E-03 K-40 9.05E-03 + 9.41E-03 1.24E-02 K-40 4.28E-03 + 6.22E-03 9.47E-03 MN-54 1.43E-04 + 8.32E-04 1.18E-03 MN-54 -1.73E-04 + 6.52E-04 9.32E-04 FE-59 -3.63E-03 + 7.84E-03 1.02E-02 FE-59 -1.39E-03 + 3.61E-03 4.92E-03 CO-60 2.58E-04 + 7.50E-04 1.03E-03 CO-60 -4.43E-04 + 7.86E-04 1.07E-03 ZN-65 5.47E-05 + 1.90E-03 2.72E-03 ZN-65 -8.83E-04 + 1.97E-03 2.66E-03 ZRNB-95 1.58E-04 + 2.18E-03 3.29E-03 ZRNB-95 7.46E-04 + 1.38E-03 1.94E-03 CS-134 -1.06E-04 + 6.56E-04 9.49E-04 CS-134 -1.10E-04 + 7.26E-04 1.25E-03 CS-137 -5.98E-04 + 1.10E-03 1.51E-03 CS-137 1.46E-04 + 3.78E-04 5.64E-04 BALA140 5.81E-03 + 4.62E-02 6.46E-02 BALA140 2.16E-03 + 1.28E-02 1.82E-02 RU-106 3.70E-03 + 8.04E-03 1.12E-02 RU-106 1.11E-03 + 5.73E-03 8.42E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/2/19 to 4/2/19 - 2nd Q 4/2/19 to 7/2/19 - 3rd Q 7/2/19 to 10/1/19 - 4th Q 10/1/19 to 12/31/19 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 2019 Location and Quarter Station 9 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.02E-01 + 1.57E-02 1.06E-02 BE-7 + 1.27E-01 + 1.51E-02 7.24E-03 K-40 0.00E+00 + 5.70E-03 2.55E-02 K-40 2.11E-03 + 6.42E-03 1.04E-02 MN-54 -1.69E-04 + 7.28E-04 1.00E-03 MN-54 -1.87E-04 + 7.04E-04 1.01E-03 FE-59 -2.04E-04 + 3.80E-03 5.27E-03 FE-59 -1.59E-03 + 3.55E-03 4.80E-03 CO-60 2.03E-04 + 6.00E-04 8.29E-04 CO-60 1.90E-04 + 5.70E-04 8.30E-04 ZN-65 3.66E-04 + 4.22E-04 8.98E-04 ZN-65 -1.02E-03 + 1.81E-03 2.43E-03 ZRNB-95 -1.38E-04 + 1.90E-03 2.74E-03 ZRNB-95 1.13E-03 + 1.19E-03 1.57E-03 CS-134 1.97E-04 + 3.45E-04 4.93E-04 CS-134 4.80E-05 + 4.62E-04 6.97E-04 CS-137 0.00E+00 + 1.58E-04 8.27E-04 CS-137 1.93E-04 + 4.11E-04 6.06E-04 BALA140 -4.15E-03 + 2.05E-02 2.57E-02 BALA140 6.92E-04 + 9.07E-03 1.32E-02 RU-106 -1.23E-03 + 5.34E-03 7.81E-03 RU-106 2.86E-04 + 4.17E-03 6.42E-03 Location and Quarter Station 9 3rd Q 2019 Location and Quarter Station 9 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.46E-01 + 2.26E-02 1.52E-02 BE-7 + 7.14E-02 + 1.51E-02 1.22E-02 K-40 3.84E-03 + 8.97E-03 1.30E-02 K-40 2.02E-03 + 1.01E-02 1.46E-02 MN-54 -1.07E-04 + 7.89E-04 1.14E-03 MN-54 -2.79E-04 + 9.21E-04 1.28E-03 FE-59 -3.60E-03 + 8.86E-03 1.15E-02 FE-59 1.87E-03 + 3.23E-03 4.36E-03 CO-60 1.56E-04 + 9.19E-04 1.28E-03 CO-60 8.47E-05 + 9.06E-04 1.27E-03 ZN-65 -4.28E-04 + 2.25E-03 3.13E-03 ZN-65 1.92E-04 + 1.92E-03 2.73E-03 ZRNB-95 6.61E-04 + 2.35E-03 3.43E-03 ZRNB-95 -1.41E-04 + 2.29E-03 3.39E-03 CS-134 -1.10E-04 + 7.54E-04 1.08E-03 CS-134 -2.54E-04 + 7.27E-04 1.03E-03 CS-137 8.68E-05 + 6.42E-04 9.51E-04 CS-137 3.48E-04 + 8.04E-04 1.13E-03 BALA140 2.37E-02 + 3.91E-02 5.11E-02 BALA140 -1.20E-02 + 3.13E-02 4.04E-02 RU-106 -2.42E-03 + 7.49E-03 1.07E-02 RU-106 3.93E-04 + 6.68E-03 9.84E-03 Location and Quarter Station 21B 1st Q 2019 Location and Quarter Station 21B 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 9.94E-02 + 1.58E-02 9.77E-03 BE-7 + 1.39E-01 + 1.83E-02 9.85E-03 K-40 5.36E-03 + 9.89E-03 1.24E-02 K-40 7.28E-03 + 9.44E-03 1.29E-02 MN-54 2.96E-04 + 4.58E-04 6.20E-04 MN-54 -3.11E-04 + 1.11E-03 1.52E-03 FE-59 1.07E-03 + 3.16E-03 4.37E-03 FE-59 -2.09E-03 + 5.04E-03 6.65E-03 CO-60 -1.75E-04 + 1.08E-03 1.43E-03 CO-60 -2.65E-04 + 9.22E-04 1.26E-03 ZN-65 2.01E-04 + 1.14E-03 1.68E-03 ZN-65 -9.53E-04 + 2.68E-03 3.57E-03 ZRNB-95 1.95E-04 + 1.64E-03 2.41E-03 ZRNB-95 6.35E-04 + 1.82E-03 2.63E-03 CS-134 1.26E-04 + 4.32E-04 6.40E-04 CS-134 -2.14E-04 + 7.43E-04 1.05E-03 CS-137 -7.21E-06 + 6.89E-04 1.00E-03 CS-137 -6.18E-04 + 1.17E-03 1.60E-03 BALA140 -6.58E-04 + 1.29E-02 1.80E-02 BALA140 4.74E-04 + 1.30E-02 1.84E-02 RU-106 1.54E-03 + 5.31E-03 7.77E-03 RU-106 3.82E-04 + 7.16E-03 1.05E-02 Location and Quarter Station 21B 3rd Q 2019 Location and Quarter Station 21B 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.77E-01 + 2.53E-02 1.74E-02 BE-7 + 6.41E-02 + 1.36E-02 1.10E-02 K-40 2.13E-03 + 8.58E-03 1.28E-02 K-40 -5.30E-03 + 1.26E-02 1.77E-02 MN-54 -3.57E-04 + 1.06E-03 1.46E-03 MN-54 -3.95E-04 + 1.05E-03 1.43E-03 FE-59 -9.33E-05 + 4.83E-03 7.10E-03 FE-59 1.02E-03 + 3.94E-03 5.53E-03 CO-60 -9.76E-05 + 1.03E-03 1.42E-03 CO-60 -3.36E-04 + 1.14E-03 1.51E-03 ZN-65 3.65E-04 + 1.07E-03 1.59E-03 ZN-65 -1.83E-03 + 3.02E-03 3.91E-03 ZRNB-95 8.14E-04 + 1.58E-03 2.30E-03 ZRNB-95 1.18E-03 + 2.01E-03 2.81E-03 CS-134 -3.62E-05 + 7.36E-04 1.07E-03 CS-134 1.04E-04 + 6.79E-04 9.78E-04 CS-137 4.19E-04 + 8.67E-04 1.21E-03 CS-137 -4.56E-04 + 8.58E-04 1.19E-03 BALA140 1.80E-02 + 3.74E-02 5.05E-02 BALA140 1.15E-03 + 2.57E-02 3.53E-02 RU-106 1.98E-03 + 7.60E-03 1.09E-02 RU-106 2.62E-03 + 7.13E-03 1.01E-02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/2/19 to 4/2/19 - 2nd Q 4/2/19 to 7/2/19 - 3rd Q 7/2/19 to 10/1/19 - 4th Q 10/1/19 to 12/31/19 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 2019 Location and Quarter Station 23 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 9.57E-02 + 1.33E-02 7.51E-03 BE-7 + 1.16E-01 + 1.47E-02 8.70E-03 K-40 7.13E-03 + 3.82E-03 8.15E-03 K-40 2.56E-03 + 5.13E-03 8.86E-03 MN-54 1.23E-04 + 3.95E-04 5.76E-04 MN-54 1.81E-04 + 5.20E-04 7.52E-04 FE-59 -1.22E-04 + 2.02E-03 3.08E-03 FE-59 -1.89E-04 + 2.35E-03 3.52E-03 CO-60 2.55E-04 + 2.28E-04 3.76E-04 CO-60 -2.78E-04 + 6.45E-04 9.31E-04 ZN-65 0.00E+00 + 3.89E-04 2.11E-03 ZN-65 -7.63E-04 + 1.49E-03 2.04E-03 ZRNB-95 3.79E-04 + 1.30E-03 1.91E-03 ZRNB-95 -1.26E-03 + 2.21E-03 3.03E-03 CS-134 1.18E-04 + 4.03E-04 5.84E-04 CS-134 -6.21E-05 + 5.37E-04 7.97E-04 CS-137 0.00E+00 + 1.55E-04 6.37E-04 CS-137 -9.96E-05 + 5.83E-04 8.68E-04 BALA140 -1.26E-03 + 1.25E-02 1.67E-02 BALA140 3.51E-04 + 6.50E-03 1.01E-02 RU-106 -2.82E-04 + 3.76E-03 5.68E-03 RU-106 -2.16E-03 + 5.21E-03 7.56E-03 Location and Quarter Station 23 3rd Q 2019 Location and Quarter Station 23 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.39E-01 + 1.86E-02 1.15E-02 BE-7 + 6.52E-02 + 1.47E-02 1.34E-02 K-40 5.56E-03 + 6.77E-03 1.01E-02 K-40 3.92E-03 + 5.28E-03 8.56E-03 MN-54 -3.82E-04 + 7.01E-04 9.75E-04 MN-54 -1.22E-04 + 8.90E-04 1.26E-03 FE-59 7.42E-04 + 3.44E-03 5.01E-03 FE-59 -5.25E-03 + 8.25E-03 1.04E-02 CO-60 4.34E-05 + 5.30E-04 8.11E-04 CO-60 -5.56E-05 + 8.87E-04 1.25E-03 ZN-65 2.24E-04 + 1.36E-03 1.98E-03 ZN-65 -1.08E-03 + 2.22E-03 2.96E-03 ZRNB-95 -2.36E-04 + 1.80E-03 2.65E-03 ZRNB-95 -2.80E-04 + 2.29E-03 3.37E-03 CS-134 -1.32E-04 + 4.91E-04 7.24E-04 CS-134 -5.29E-04 + 9.41E-04 1.29E-03 CS-137 -3.05E-04 + 5.99E-04 8.59E-04 CS-137 0.00E+00 + 0.00E+00 9.84E-04 BALA140 -3.80E-02 + 5.88E-02 7.45E-02 BALA140 6.75E-03 + 2.28E-02 3.09E-02 RU-106 2.77E-03 + 6.18E-03 8.88E-03 RU-106 -3.09E-03 + 9.19E-03 1.29E-02 Location and Quarter Station 40 1st Q 2019 Location and Quarter Station 40 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.18E-01 + 1.75E-02 1.13E-02 BE-7 + 1.22E-01 + 1.52E-02 9.16E-03 K-40 3.89E-03 + 6.93E-03 8.86E-03 K-40 6.72E-03 + 8.97E-03 1.26E-02 MN-54 2.26E-04 + 5.63E-04 7.83E-04 MN-54 0.00E+00 + 2.14E-04 7.84E-04 FE-59 -8.15E-04 + 5.01E-03 6.67E-03 FE-59 -5.48E-04 + 3.07E-03 4.38E-03 CO-60 0.00E+00 + 1.34E-04 1.15E-03 CO-60 4.48E-05 + 5.47E-04 8.36E-04 ZN-65 1.47E-03 + 1.36E-03 1.61E-03 ZN-65 -2.98E-04 + 1.49E-03 2.12E-03 ZRNB-95 8.14E-04 + 1.67E-03 2.32E-03 ZRNB-95 6.76E-04 + 5.12E-04 7.12E-04 CS-134 -2.57E-04 + 7.04E-04 9.90E-04 CS-134 1.02E-04 + 4.72E-04 7.03E-04 CS-137 -6.88E-05 + 4.28E-04 6.44E-04 CS-137 -2.49E-04 + 5.44E-04 7.90E-04 BALA140 1.18E-02 + 7.92E-03 2.11E-02 BALA140 -5.72E-04 + 7.12E-03 1.10E-02 RU-106 0.00E+00 + 2.76E-03 1.06E-02 RU-106 -2.31E-03 + 5.54E-03 8.02E-03 Location and Quarter Station 40 3rd Q 2019 Location and Quarter Station 40 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.59E-01 + 2.32E-02 1.45E-02 BE-7 + 6.27E-02 + 1.48E-02 1.39E-02 K-40 9.43E-03 + 9.81E-03 1.30E-02 K-40 1.11E-03 + 1.06E-02 1.51E-02 MN-54 -1.92E-04 + 1.00E-03 1.40E-03 MN-54 -3.12E-04 + 8.74E-04 1.21E-03 FE-59 2.34E-03 + 4.05E-03 5.48E-03 FE-59 -7.19E-04 + 5.95E-03 8.08E-03 CO-60 1.98E-04 + 7.68E-04 1.08E-03 CO-60 -3.85E-04 + 8.99E-04 1.20E-03 ZN-65 1.11E-03 + 1.88E-03 2.51E-03 ZN-65 3.62E-04 + 1.60E-03 2.27E-03 ZRNB-95 -1.65E-04 + 2.28E-03 3.43E-03 ZRNB-95 2.68E-04 + 1.68E-03 2.52E-03 CS-134 -5.74E-04 + 1.02E-03 1.39E-03 CS-134 -3.42E-04 + 8.36E-04 1.16E-03 CS-137 8.68E-05 + 7.11E-04 1.04E-03 CS-137 -2.45E-04 + 7.88E-04 1.12E-03 BALA140 1.40E-02 + 3.70E-02 5.15E-02 BALA140 -2.28E-03 + 2.96E-02 3.97E-02 RU-106 -3.62E-03 + 9.18E-03 1.28E-02 RU-106 -2.67E-03 + 6.45E-03 9.13E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/2/19 to 4/2/19 - 2nd Q 4/2/19 to 7/2/19 - 3rd Q 7/2/19 to 10/1/19 - 4th Q 10/1/19 to 12/31/19 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 2019 Location and Quarter Station 48 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.07E-01 + 1.62E-02 1.09E-02 BE-7 + 1.23E-01 + 1.74E-02 1.00E-02 K-40 6.61E-03 + 4.18E-03 1.06E-02 K-40 -2.33E-03 + 1.19E-02 1.73E-02 MN-54 0.00E+00 + 1.92E-04 1.15E-03 MN-54 7.22E-04 + 7.65E-04 9.86E-04 FE-59 0.00E+00 + 2.05E-03 7.50E-03 FE-59 1.01E-03 + 2.73E-03 3.90E-03 CO-60 1.44E-04 + 6.08E-04 8.59E-04 CO-60 1.41E-05 + 8.92E-04 1.27E-03 ZN-65 6.97E-04 + 1.19E-03 1.60E-03 ZN-65 -8.59E-04 + 2.37E-03 3.19E-03 ZRNB-95 6.84E-04 + 1.64E-03 2.30E-03 ZRNB-95 1.04E-03 + 1.09E-03 1.41E-03 CS-134 -1.19E-04 + 6.07E-04 8.77E-04 CS-134 -2.16E-04 + 7.82E-04 1.11E-03 CS-137 3.41E-04 + 4.75E-04 6.39E-04 CS-137 2.61E-04 + 6.10E-04 8.75E-04 BALA140 3.27E-03 + 1.34E-02 1.79E-02 BALA140 -1.08E-02 + 2.16E-02 2.74E-02 RU-106 7.31E-04 + 3.56E-03 5.49E-03 RU-106 -4.26E-03 + 9.59E-03 1.33E-02 Location and Quarter Station 48 3rd Q 2019 Location and Quarter Station 48 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.45E-01 + 1.99E-02 1.18E-02 BE-7 + 5.41E-02 + 1.15E-02 9.07E-03 K-40 5.73E-03 + 1.03E-02 1.44E-02 K-40 3.60E-03 + 8.63E-03 1.26E-02 MN-54 1.27E-04 + 5.97E-04 8.80E-04 MN-54 -1.16E-04 + 6.80E-04 9.86E-04 FE-59 -3.00E-04 + 3.72E-03 5.57E-03 FE-59 -1.31E-03 + 4.10E-03 5.65E-03 CO-60 -1.43E-04 + 6.97E-04 1.04E-03 CO-60 -2.60E-04 + 7.63E-04 1.09E-03 ZN-65 4.89E-04 + 8.74E-04 1.25E-03 ZN-65 -5.32E-04 + 1.69E-03 2.36E-03 ZRNB-95 -1.05E-03 + 2.51E-03 3.53E-03 ZRNB-95 0.00E+00 + 6.83E-04 2.20E-03 CS-134 -2.35E-04 + 6.69E-04 9.66E-04 CS-134 3.27E-05 + 5.18E-04 7.78E-04 CS-137 2.08E-04 + 4.67E-04 6.89E-04 CS-137 1.13E-04 + 3.13E-04 4.83E-04 BALA140 1.36E-03 + 2.52E-02 3.93E-02 BALA140 0.00E+00 + 4.23E-03 1.10E-02 RU-106 1.54E-03 + 2.99E-03 4.48E-03 RU-106 5.30E-04 + 4.79E-03 7.26E-03 Location and Quarter Station 57 1st Q 2019 Location and Quarter Station 57 2nd Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 9.12E-02 + 1.47E-02 8.82E-03 BE-7 + 1.31E-01 + 1.51E-02 6.14E-03 K-40 -4.40E-04 + 1.22E-02 1.58E-02 K-40 2.82E-03 + 7.51E-03 1.14E-02 MN-54 1.20E-04 + 6.53E-04 9.22E-04 MN-54 -2.61E-04 + 7.80E-04 1.10E-03 FE-59 7.55E-04 + 4.10E-03 5.57E-03 FE-59 4.43E-04 + 3.02E-03 4.33E-03 CO-60 2.21E-05 + 8.18E-04 1.14E-03 CO-60 1.48E-04 + 5.60E-04 8.26E-04 ZN-65 8.87E-04 + 6.71E-04 9.34E-04 ZN-65 -6.88E-04 + 1.52E-03 2.10E-03 ZRNB-95 0.00E+00 + 3.52E-04 2.87E-03 ZRNB-95 9.55E-05 + 1.03E-03 1.59E-03 CS-134 -1.70E-05 + 5.03E-04 7.55E-04 CS-134 5.32E-06 + 5.03E-04 7.60E-04 CS-137 -1.23E-04 + 7.27E-04 1.03E-03 CS-137 1.79E-04 + 5.73E-04 8.43E-04 BALA140 3.94E-03 + 4.55E-03 9.67E-03 BALA140 -5.67E-03 + 1.61E-02 2.13E-02 RU-106 2.92E-03 + 5.24E-03 7.36E-03 RU-106 7.98E-04 + 4.02E-03 6.12E-03 Location and Quarter Station 57 3rd Q 2019 Location and Quarter Station 57 4th Q 2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.73E-01 + 2.48E-02 1.57E-02 BE-7 + 8.11E-02 + 1.38E-02 9.68E-03 K-40 3.36E-03 + 9.12E-03 1.33E-02 K-40 1.31E-03 + 7.46E-03 1.17E-02 MN-54 7.23E-04 + 8.16E-04 1.06E-03 MN-54 -1.55E-04 + 7.28E-04 1.05E-03 FE-59 -4.38E-03 + 8.47E-03 1.09E-02 FE-59 -2.80E-03 + 5.51E-03 7.27E-03 CO-60 2.18E-04 + 5.87E-04 8.39E-04 CO-60 2.99E-04 + 3.07E-04 4.29E-04 ZN-65 4.69E-04 + 1.52E-03 2.18E-03 ZN-65 2.47E-04 + 2.01E-03 3.55E-03 ZRNB-95 -5.09E-04 + 2.99E-03 4.34E-03 ZRNB-95 -4.27E-04 + 2.00E-03 2.87E-03 CS-134 2.26E-04 + 6.36E-04 9.08E-04 CS-134 -4.10E-04 + 1.25E-03 2.11E-03 CS-137 1.78E-04 + 6.52E-04 9.51E-04 CS-137 1.64E-04 + 6.13E-04 9.04E-04 BALA140 2.46E-02 + 4.05E-02 5.29E-02 BALA140 1.21E-03 + 1.58E-02 2.29E-02 RU-106 1.65E-03 + 8.52E-03 1.22E-02 RU-106 9.47E-04 + 5.13E-03 7.67E-03 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit.

1st Q 1/2/19 to 4/2/19 - 2nd Q 4/2/19 to 7/2/19 - 3rd Q 7/2/19 to 10/1/19 - 4th Q 10/1/19 to 12/31/19 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 Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs BE-7 Ind 1.13E-01 5.41E-02 1.80E-01 1.06E-02 44 44 BE-7 Cntl 1.12E-01 7.14E-02 1.46E-01 1.13E-02 4 4 K-40 Ind 4.24E-03 -5.30E-03 1.47E-02 1.22E-02 44 1 K-40 Cntl 1.99E-03 0.00E+00 3.84E-03 1.59E-02 4 0 MN-54 Ind -5.17E-05 -6.56E-04 7.23E-04 1.04E-03 44 0 MN-54 Cntl -1.86E-04 -2.79E-04 -1.07E-04 1.11E-03 4 0 FE-59 Ind -1.27E-04 -5.25E-03 2.34E-03 5.50E-03 44 0 FE-59 Cntl -8.82E-04 -3.60E-03 1.87E-03 6.49E-03 4 0 CO-60 Ind -1.08E-06 -5.41E-04 6.57E-04 9.96E-04 44 0 CO-60 Cntl 1.58E-04 8.47E-05 2.03E-04 1.05E-03 4 0 ZN-65 Ind -4.50E-05 -1.83E-03 1.47E-03 2.25E-03 44 0 ZN-65 Cntl -2.23E-04 -1.02E-03 3.66E-04 2.30E-03 4 0 ZRNB-95 Ind 1.39E-04 -1.26E-03 1.32E-03 2.58E-03 44 0 ZRNB-95 Cntl 3.78E-04 -1.41E-04 1.13E-03 2.78E-03 4 0 CS-134 Ind -1.13E-04 -5.91E-04 2.40E-04 9.54E-04 44 0 CS-134 Cntl -3.00E-05 -2.54E-04 1.97E-04 8.25E-04 4 0 CS-137 Ind 1.02E-05 -6.18E-04 4.80E-04 9.29E-04 44 0 CS-137 Cntl 1.57E-04 0.00E+00 3.48E-04 8.79E-04 4 0 BALA140 Ind 1.91E-04 -3.80E-02 2.46E-02 2.91E-02 44 0 BALA140 Cntl 2.06E-03 -1.20E-02 2.37E-02 3.26E-02 4 0 RU-106 Ind -4.47E-04 -4.84E-03 3.70E-03 8.96E-03 44 0 RU-106 Cntl -7.42E-04 -2.42E-03 3.93E-04 8.68E-03 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 Collection Period RQ Activity Error MDA RQ Activity Error MDA 1/2/2019 - 1/8/2019 3.82E-03 + 1.20E-02 1.77E-02 3.78E-03 + 1.19E-02 1.75E-02 1/8/2019 - 1/15/2019 2.85E-03 + 1.08E-02 1.60E-02 2.81E-03 + 1.06E-02 1.58E-02 1/15/2019 - 1/22/2019 3.07E-04 + 1.12E-02 1.69E-02 3.06E-04 + 1.12E-02 1.69E-02 1/22/2019 - 1/29/2019 7.81E-03 + 1.07E-02 1.50E-02 7.75E-03 + 1.06E-02 1.49E-02 1/29/2019 - 2/6/2019 2.85E-03 + 1.14E-02 1.67E-02 2.83E-03 + 1.13E-02 1.66E-02

• • 2/6/2019 - 2/12/2019 -4.63E-03 + 1.15E-02 1.65E-02 7.86E-03 + 1.33E-02 1.89E-02

• • 2/12/2019 - 2/19/2019 0.00E+00 + 8.92E-03 4.37E-02 0.00E+00 + 5.21E-03 2.55E-02 2/19/2019 - 2/26/2019 3.86E-03 + 1.12E-02 1.64E-02 3.93E-03 + 1.14E-02 1.67E-02 2/26/2019 - 3/5/2019 -7.36E-03 + 1.86E-02 2.64E-02 -7.14E-03 + 1.80E-02 2.56E-02 3/5/2019 - 3/12/2019 -2.66E-03 + 1.42E-02 2.07E-02 -2.65E-03 + 1.41E-02 2.07E-02 3/12/2019 - 3/19/2019 3.26E-03 + 1.30E-02 1.90E-02 3.21E-03 + 1.28E-02 1.88E-02 3/19/2019 - 3/26/2019 -4.34E-03 + 1.02E-02 1.53E-02 -4.14E-03 + 9.73E-03 1.45E-02 3/26/2019 - 4/2/2019 1.17E-03 + 8.08E-03 1.27E-02 1.12E-03 + 7.75E-03 1.22E-02 4/2/2019 - 4/9/2019 8.28E-04 + 9.26E-03 1.45E-02 7.88E-04 + 8.81E-03 1.38E-02 4/9/2019 - 4/16/2019 7.77E-03 + 8.60E-03 1.22E-02 7.46E-03 + 8.25E-03 1.17E-02 4/16/2019 - 4/23/2019 -2.71E-03 + 1.15E-02 1.74E-02 -2.57E-03 + 1.09E-02 1.65E-02 4/23/2019 - 4/30/2019 -2.49E-03 + 9.49E-03 1.45E-02 -2.36E-03 + 8.98E-03 1.38E-02 4/30/2019 - 5/7/2019 5.53E-03 + 7.81E-03 1.14E-02 5.29E-03 + 7.47E-03 1.09E-02 5/7/2019 - 5/14/2019 8.58E-04 + 1.02E-02 1.60E-02 7.35E-04 + 8.72E-03 1.37E-02 5/14/2019 - 5/21/2019 -7.57E-03 + 1.75E-02 2.58E-02 -5.71E-03 + 1.32E-02 1.95E-02 5/21/2019 - 5/28/2019 -1.27E-03 + 1.27E-02 1.94E-02 -1.22E-03 + 1.22E-02 1.86E-02 5/28/2019 - 6/4/2019 4.05E-03 + 1.23E-02 1.84E-02 3.86E-03 + 1.17E-02 1.75E-02 6/4/2019 - 6/11/2019 5.41E-03 + 1.07E-02 1.59E-02 5.05E-03 + 1.00E-02 1.48E-02 6/11/2019 - 6/18/2019 2.43E-03 + 1.13E-02 1.73E-02 2.28E-03 + 1.06E-02 1.62E-02 6/18/2019 - 6/25/2019 -3.53E-03 + 1.42E-02 2.13E-02 -3.37E-03 + 1.36E-02 2.04E-02 6/25/2019 - 7/2/2019 5.25E-03 + 9.91E-03 1.47E-02 5.00E-03 + 9.44E-03 1.40E-02 7/2/2019 - 7/9/2019 -8.50E-03 + 1.65E-02 2.41E-02 -8.10E-03 + 1.57E-02 2.30E-02 7/9/2019 - 7/16/2019 7.05E-04 + 1.33E-02 2.03E-02 6.80E-04 + 1.28E-02 1.96E-02 7/16/2019 - 7/23/2019 1.18E-04 + 1.33E-02 2.04E-02 1.13E-04 + 1.27E-02 1.95E-02 7/23/2019 - 7/30/2019 -2.81E-03 + 1.34E-02 2.02E-02 -2.70E-03 + 1.29E-02 1.95E-02 7/30/2019 - 8/6/2019 4.22E-04 + 1.83E-02 2.78E-02 3.99E-04 + 1.73E-02 2.63E-02 8/6/2019 - 8/13/2019 -4.86E-03 + 1.69E-02 2.52E-02 -4.66E-03 + 1.62E-02 2.42E-02 8/13/2019 - 8/20/2019 1.17E-03 + 1.40E-02 2.13E-02 1.11E-03 + 1.32E-02 2.02E-02 8/20/2019 - 8/27/2019 6.68E-03 + 1.10E-02 1.62E-02 6.33E-03 + 1.05E-02 1.53E-02 8/27/2019 - 9/3/2019 1.05E-03 + 1.08E-02 1.67E-02 1.01E-03 + 1.04E-02 1.61E-02 9/3/2019 - 9/10/2019 -6.36E-03 + 1.42E-02 2.10E-02 -6.23E-03 + 1.39E-02 2.06E-02 9/10/2019 - 9/17/2019 2.28E-04 + 1.21E-02 1.87E-02 2.29E-04 + 1.21E-02 1.87E-02 9/17/2019 - 9/24/2019 -7.76E-03 + 1.51E-02 2.21E-02 -7.91E-03 + 1.54E-02 2.25E-02 9/24/2019 - 10/1/2019 -7.90E-03 + 1.53E-02 2.24E-02 -8.02E-03 + 1.56E-02 2.28E-02 10/1/2019 - 10/8/2019 -1.77E-03 + 1.23E-02 1.87E-02 -1.86E-03 + 1.28E-02 1.95E-02 10/8/2019 - 10/15/2019 3.49E-03 + 1.29E-02 1.94E-02 3.59E-03 + 1.33E-02 2.00E-02 10/15/2019 - 10/22/2019 -2.93E-03 + 1.26E-02 1.90E-02 -2.95E-03 + 1.27E-02 1.91E-02 10/22/2019 - 10/29/2019 -2.86E-03 + 1.39E-02 2.09E-02 -2.89E-03 + 1.40E-02 2.11E-02 10/29/2019 - 11/5/2019 3.79E-03 + 1.38E-02 2.06E-02 3.85E-03 + 1.40E-02 2.09E-02 11/5/2019 - 11/12/2019 3.13E-03 + 1.14E-02 1.72E-02 3.22E-03 + 1.17E-02 1.77E-02 11/12/2019 - 11/19/2019 -4.31E-03 + 1.78E-02 2.66E-02 -4.27E-03 + 1.76E-02 2.64E-02 11/19/2019 - 11/26/2019 -8.01E-04 + 1.14E-02 1.76E-02 -8.69E-04 + 1.24E-02 1.91E-02 11/26/2019 - 12/3/2019 -5.09E-03 + 1.41E-02 2.10E-02 -5.25E-03 + 1.46E-02 2.16E-02 12/3/2019 - 12/10/2019 -5.50E-04 + 1.13E-02 1.75E-02 -5.61E-04 + 1.16E-02 1.78E-02 12/10/2019 - 12/17/2019 -1.31E-03 + 1.10E-02 1.69E-02 -1.34E-03 + 1.12E-02 1.72E-02 12/17/2019 - 12/23/2019 -5.44E-03 + 1.44E-02 2.14E-02 -5.68E-03 + 1.50E-02 2.23E-02 12/23/2019 - 12/31/2019 -1.11E-03 + 1.69E-02 2.57E-02 -1.17E-03 + 1.79E-02 2.72E-02 RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. 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 Collection Period RQ Activity Error MDA RQ Activity Error MDA 1/2/2019 - 1/8/2019 4.15E-03 + 1.30E-02 1.92E-02 3.94E-03 + 1.24E-02 1.82E-02 1/8/2019 - 1/15/2019 3.08E-03 + 1.17E-02 1.72E-02 2.94E-03 + 1.12E-02 1.65E-02 1/15/2019 - 1/22/2019 3.31E-04 + 1.21E-02 1.82E-02 3.15E-04 + 1.15E-02 1.74E-02 1/22/2019 - 1/29/2019 8.40E-03 + 1.15E-02 1.61E-02 8.08E-03 + 1.11E-02 1.55E-02 1/29/2019 - 2/6/2019 3.10E-03 + 1.24E-02 1.81E-02 2.96E-03 + 1.18E-02 1.73E-02 2/6/2019 - 2/12/2019 8.72E-03 + 1.47E-02 2.09E-02 7.84E-03 + 1.32E-02 1.88E-02 2/12/2019 - 2/19/2019 0.00E+00 + 5.78E-03 2.83E-02 0.00E+00 + 5.59E-03 2.74E-02 2/19/2019 - 2/26/2019 4.42E-03 + 1.28E-02 1.87E-02 3.89E-03 + 1.13E-02 1.65E-02 2/26/2019 - 3/5/2019 -7.87E-03 + 1.99E-02 2.83E-02 -7.84E-03 + 1.98E-02 2.81E-02 3/5/2019 - 3/12/2019 -3.05E-03 + 1.62E-02 2.37E-02 -2.83E-03 + 1.50E-02 2.20E-02 3/12/2019 - 3/19/2019 3.71E-03 + 1.48E-02 2.17E-02 3.36E-03 + 1.34E-02 1.96E-02 3/19/2019 - 3/26/2019 -4.83E-03 + 1.14E-02 1.70E-02 -4.41E-03 + 1.04E-02 1.55E-02 3/26/2019 - 4/2/2019 1.32E-03 + 9.11E-03 1.43E-02 1.19E-03 + 8.22E-03 1.29E-02 4/2/2019 - 4/9/2019 8.96E-04 + 1.00E-02 1.57E-02 7.97E-04 + 8.91E-03 1.39E-02 4/9/2019 - 4/16/2019 8.36E-03 + 9.25E-03 1.31E-02 7.98E-03 + 8.83E-03 1.25E-02 4/16/2019 - 4/23/2019 -2.93E-03 + 1.24E-02 1.88E-02 -2.67E-03 + 1.13E-02 1.71E-02 4/23/2019 - 4/30/2019 -2.75E-03 + 1.05E-02 1.60E-02 -2.49E-03 + 9.49E-03 1.45E-02 4/30/2019 - 5/7/2019 6.05E-03 + 8.54E-03 1.25E-02 5.60E-03 + 7.90E-03 1.15E-02 5/7/2019 - 5/14/2019 8.40E-04 + 9.96E-03 1.57E-02 7.77E-04 + 9.22E-03 1.45E-02 5/14/2019 - 5/21/2019 -6.52E-03 + 1.50E-02 2.22E-02 -5.96E-03 + 1.38E-02 2.03E-02 5/21/2019 - 5/28/2019 -1.40E-03 + 1.40E-02 2.14E-02 -1.27E-03 + 1.27E-02 1.95E-02 5/28/2019 - 6/4/2019 3.91E-03 + 1.18E-02 1.78E-02 4.11E-03 + 1.24E-02 1.87E-02 6/4/2019 - 6/11/2019 5.27E-03 + 1.04E-02 1.55E-02 5.45E-03 + 1.08E-02 1.60E-02 6/11/2019 - 6/18/2019 2.35E-03 + 1.09E-02 1.66E-02 2.45E-03 + 1.14E-02 1.74E-02 6/18/2019 - 6/25/2019 -3.42E-03 + 1.38E-02 2.07E-02 -3.54E-03 + 1.43E-02 2.14E-02 6/25/2019 - 7/2/2019 5.13E-03 + 9.69E-03 1.44E-02 5.24E-03 + 9.89E-03 1.47E-02 7/2/2019 - 7/9/2019 -8.26E-03 + 1.60E-02 2.34E-02 -8.53E-03 + 1.65E-02 2.42E-02 7/9/2019 - 7/16/2019 6.98E-04 + 1.31E-02 2.01E-02 7.14E-04 + 1.34E-02 2.06E-02 7/16/2019 - 7/23/2019 1.17E-04 + 1.31E-02 2.02E-02 1.19E-04 + 1.33E-02 2.05E-02 7/23/2019 - 7/30/2019 -2.77E-03 + 1.32E-02 2.00E-02 -2.87E-03 + 1.37E-02 2.07E-02 7/30/2019 - 8/6/2019 4.14E-04 + 1.79E-02 2.73E-02 4.25E-04 + 1.84E-02 2.80E-02 8/6/2019 - 8/13/2019 -4.83E-03 + 1.67E-02 2.50E-02 -4.94E-03 + 1.71E-02 2.56E-02 8/13/2019 - 8/20/2019 1.16E-03 + 1.38E-02 2.10E-02 1.19E-03 + 1.42E-02 2.16E-02 8/20/2019 - 8/27/2019 6.44E-03 + 1.06E-02 1.56E-02 6.71E-03 + 1.11E-02 1.63E-02 8/27/2019 - 9/3/2019 1.04E-03 + 1.07E-02 1.66E-02 1.06E-03 + 1.09E-02 1.68E-02 9/3/2019 - 9/10/2019 -6.22E-03 + 1.39E-02 2.05E-02 -6.53E-03 + 1.46E-02 2.16E-02 9/10/2019 - 9/17/2019 2.25E-04 + 1.19E-02 1.84E-02 2.31E-04 + 1.22E-02 1.89E-02 9/17/2019 - 9/24/2019 -7.61E-03 + 1.48E-02 2.17E-02 -7.58E-03 + 1.47E-02 2.16E-02 9/24/2019 - 10/1/2019 -7.92E-03 + 1.54E-02 2.25E-02 -8.55E-03 + 1.66E-02 2.43E-02 10/1/2019 - 10/8/2019 -1.77E-03 + 1.23E-02 1.87E-02 -1.82E-03 + 1.26E-02 1.91E-02 10/8/2019 - 10/15/2019 3.47E-03 + 1.29E-02 1.94E-02 3.56E-03 + 1.32E-02 1.99E-02 10/15/2019 - 10/22/2019 -2.91E-03 + 1.25E-02 1.88E-02 -2.94E-03 + 1.26E-02 1.91E-02 10/22/2019 - 10/29/2019 -2.80E-03 + 1.36E-02 2.05E-02 -2.80E-03 + 1.36E-02 2.05E-02 10/29/2019 - 11/5/2019 3.75E-03 + 1.36E-02 2.03E-02 3.73E-03 + 1.36E-02 2.02E-02 11/5/2019 - 11/12/2019 4.33E-03 + 1.58E-02 2.39E-02 3.15E-03 + 1.15E-02 1.73E-02 11/12/2019 - 11/19/2019 -4.20E-03 + 1.73E-02 2.59E-02 -4.18E-03 + 1.73E-02 2.58E-02 11/19/2019 - 11/26/2019 -7.91E-04 + 1.13E-02 1.74E-02 -8.38E-04 + 1.19E-02 1.84E-02 11/26/2019 - 12/3/2019 -4.99E-03 + 1.39E-02 2.06E-02 -5.10E-03 + 1.42E-02 2.10E-02 12/3/2019 - 12/10/2019 -5.40E-04 + 1.11E-02 1.72E-02 -5.50E-04 + 1.13E-02 1.75E-02 12/10/2019 - 12/17/2019 -1.29E-03 + 1.08E-02 1.66E-02 -1.31E-03 + 1.10E-02 1.69E-02 12/17/2019 - 12/23/2019 -5.37E-03 + 1.42E-02 2.11E-02 -5.52E-03 + 1.46E-02 2.17E-02 12/23/2019 - 12/31/2019 -1.09E-03 + 1.66E-02 2.52E-02 -1.12E-03 + 1.71E-02 2.60E-02 RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. 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 Collection Period RQ Activity Error MDA RQ Activity Error MDA 1/2/2019 - 1/8/2019 6.61E-03 + 1.07E-02 1.53E-02 7.12E-03 + 1.15E-02 1.65E-02 1/8/2019 - 1/15/2019 1.29E-02 + 1.20E-02 1.61E-02 1.39E-02 + 1.28E-02 1.73E-02 1/15/2019 - 1/22/2019 3.64E-03 + 1.24E-02 1.82E-02 3.88E-03 + 1.32E-02 1.94E-02 1/22/2019 - 1/29/2019 6.65E-03 + 1.38E-02 1.98E-02 7.12E-03 + 1.48E-02 2.12E-02 1/29/2019 - 2/6/2019 4.43E-03 + 1.42E-02 2.06E-02 4.86E-03 + 1.56E-02 2.26E-02 2/6/2019 - 2/12/2019 8.21E-03 + 1.39E-02 1.97E-02 0.00E+00 + 4.31E-03 3.16E-02 2/12/2019 - 2/19/2019 4.42E-03 + 1.64E-02 2.37E-02 4.75E-03 + 1.75E-02 2.54E-02 2/19/2019 - 2/26/2019 -9.88E-03 + 1.86E-02 2.62E-02 -1.14E-02 + 2.14E-02 3.02E-02 2/26/2019 - 3/5/2019 4.54E-03 + 1.12E-02 1.64E-02 4.87E-03 + 1.20E-02 1.76E-02 3/5/2019 - 3/12/2019 -1.05E-03 + 1.66E-02 2.45E-02 -1.17E-03 + 1.84E-02 2.71E-02 3/12/2019 - 3/19/2019 -3.54E-03 + 1.53E-02 2.23E-02 -3.82E-03 + 1.65E-02 2.41E-02 3/19/2019 - 3/26/2019 -1.54E-03 + 1.21E-02 1.85E-02 -1.64E-03 + 1.29E-02 1.97E-02 3/26/2019 - 4/2/2019 -5.80E-03 + 1.23E-02 1.83E-02 -6.20E-03 + 1.32E-02 1.95E-02 4/2/2019 - 4/9/2019 -3.08E-03 + 1.13E-02 1.71E-02 -3.19E-03 + 1.17E-02 1.77E-02 4/9/2019 - 4/16/2019 -4.41E-03 + 1.10E-02 1.65E-02 -4.58E-03 + 1.15E-02 1.72E-02 4/16/2019 - 4/23/2019 2.82E-03 + 8.63E-03 1.32E-02 3.30E-03 + 1.01E-02 1.54E-02 4/23/2019 - 4/30/2019 1.67E-03 + 7.78E-03 1.22E-02 1.84E-03 + 8.59E-03 1.35E-02 4/30/2019 - 5/7/2019 3.84E-03 + 1.05E-02 1.58E-02 4.10E-03 + 1.12E-02 1.69E-02 5/7/2019 - 5/14/2019 4.09E-03 + 8.04E-03 1.21E-02 4.26E-03 + 8.38E-03 1.26E-02 5/14/2019 - 5/21/2019 3.91E-03 + 1.33E-02 2.00E-02 4.05E-03 + 1.38E-02 2.08E-02 5/21/2019 - 5/28/2019 5.03E-03 + 1.00E-02 1.50E-02 5.18E-03 + 1.03E-02 1.55E-02 5/28/2019 - 6/4/2019 -4.40E-03 + 1.33E-02 2.00E-02 -3.81E-03 + 1.15E-02 1.73E-02 6/4/2019 - 6/11/2019 -8.41E-03 + 1.69E-02 2.48E-02 -7.19E-03 + 1.45E-02 2.12E-02 6/11/2019 - 6/18/2019 -7.38E-03 + 1.45E-02 2.13E-02 -6.32E-03 + 1.24E-02 1.82E-02 6/18/2019 - 6/25/2019 7.98E-04 + 1.22E-02 1.87E-02 7.76E-04 + 1.18E-02 1.82E-02 6/25/2019 - 7/2/2019 -2.33E-04 + 1.16E-02 1.79E-02 -2.20E-04 + 1.09E-02 1.69E-02 7/2/2019 - 7/9/2019 3.28E-03 + 1.19E-02 1.81E-02 3.08E-03 + 1.12E-02 1.70E-02 7/9/2019 - 7/16/2019 2.89E-03 + 1.28E-02 1.94E-02 2.73E-03 + 1.20E-02 1.83E-02 7/16/2019 - 7/23/2019 4.59E-03 + 1.39E-02 2.08E-02 4.31E-03 + 1.31E-02 1.96E-02 7/23/2019 - 7/30/2019 2.63E-03 + 1.08E-02 1.65E-02 2.47E-03 + 1.02E-02 1.55E-02 7/30/2019 - 8/6/2019 -7.08E-03 + 1.89E-02 2.80E-02 -6.51E-03 + 1.74E-02 2.57E-02 8/6/2019 - 8/13/2019 1.31E-03 + 1.61E-02 2.46E-02 1.19E-03 + 1.46E-02 2.23E-02 8/13/2019 - 8/20/2019 -8.17E-03 + 1.59E-02 2.33E-02 -7.31E-03 + 1.42E-02 2.09E-02 8/20/2019 - 8/27/2019 1.27E-03 + 1.32E-02 2.02E-02 1.12E-03 + 1.16E-02 1.78E-02 8/27/2019 - 9/3/2019 -5.57E-03 + 1.47E-02 2.19E-02 -5.00E-03 + 1.32E-02 1.97E-02 9/3/2019 - 9/10/2019 4.92E-03 + 1.18E-02 1.76E-02 4.81E-03 + 1.16E-02 1.72E-02 9/10/2019 - 9/17/2019 -3.97E-03 + 1.35E-02 2.02E-02 -3.73E-03 + 1.26E-02 1.90E-02 9/17/2019 - 9/24/2019 1.73E-03 + 1.37E-02 2.08E-02 1.63E-03 + 1.29E-02 1.97E-02 9/24/2019 - 10/1/2019 2.08E-03 + 1.17E-02 1.78E-02 1.98E-03 + 1.11E-02 1.69E-02 10/1/2019 - 10/8/2019 2.77E-03 + 1.09E-02 1.66E-02 2.60E-03 + 1.02E-02 1.55E-02 10/8/2019 - 10/15/2019 5.65E-03 + 1.11E-02 1.65E-02 5.31E-03 + 1.05E-02 1.55E-02 10/15/2019 - 10/22/2019 1.49E-03 + 1.11E-02 1.71E-02 1.41E-03 + 1.05E-02 1.63E-02 10/22/2019 - 10/29/2019 2.75E-03 + 9.98E-03 1.52E-02 2.63E-03 + 9.54E-03 1.45E-02 10/29/2019 - 11/5/2019 -5.79E-03 + 1.37E-02 2.03E-02 -5.46E-03 + 1.30E-02 1.91E-02 11/5/2019 - 11/12/2019 -7.34E-03 + 1.67E-02 2.46E-02 -6.79E-03 + 1.55E-02 2.28E-02 11/12/2019 - 11/19/2019 -3.81E-03 + 1.66E-02 2.50E-02 -3.43E-03 + 1.50E-02 2.25E-02 11/19/2019 - 11/26/2019 -4.53E-03 + 1.62E-02 2.42E-02 -3.91E-03 + 1.40E-02 2.09E-02 11/26/2019 - 12/3/2019 -6.18E-03 + 1.61E-02 2.39E-02 -5.26E-03 + 1.37E-02 2.03E-02 12/3/2019 - 12/10/2019 2.02E-03 + 1.07E-02 1.64E-02 1.76E-03 + 9.31E-03 1.43E-02 12/10/2019 - 12/17/2019 3.76E-03 + 1.32E-02 1.99E-02 3.11E-03 + 1.09E-02 1.65E-02 12/17/2019 - 12/23/2019 6.48E-03 + 1.42E-02 2.12E-02 5.18E-03 + 1.14E-02 1.69E-02 12/23/2019 - 12/31/2019 4.47E-03 + 1.52E-02 2.29E-02 4.21E-03 + 1.43E-02 2.16E-02 RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. 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 Station 21B Collection Period RQ Activity Error MDA RQ Activity Error MDA 1/2/2019 - 1/8/2019 6.29E-03 + 1.02E-02 1.46E-02 6.72E-03 + 1.09E-02 1.56E-02 1/8/2019 - 1/15/2019 1.22E-02 + 1.13E-02 1.52E-02 1.32E-02 + 1.22E-02 1.63E-02 1/15/2019 - 1/22/2019 3.44E-03 + 1.18E-02 1.73E-02 3.69E-03 + 1.26E-02 1.85E-02 1/22/2019 - 1/29/2019 6.24E-03 + 1.30E-02 1.86E-02 6.75E-03 + 1.40E-02 2.01E-02 1/29/2019 - 2/6/2019 4.18E-03 + 1.34E-02 1.94E-02 4.55E-03 + 1.46E-02 2.11E-02 2/6/2019 - 2/12/2019 0.00E+00 + 3.71E-03 2.72E-02 0.00E+00 + 3.80E-03 2.78E-02 2/12/2019 - 2/19/2019 4.01E-03 + 1.48E-02 2.15E-02 4.64E-03 + 1.71E-02 2.48E-02 2/19/2019 - 2/26/2019 -9.64E-03 + 1.82E-02 2.56E-02 -1.03E-02 + 1.94E-02 2.73E-02 2/26/2019 - 3/5/2019 4.08E-03 + 1.01E-02 1.47E-02 4.65E-03 + 1.15E-02 1.68E-02 3/5/2019 - 3/12/2019 -9.75E-04 + 1.53E-02 2.26E-02 -1.09E-03 + 1.71E-02 2.52E-02 3/12/2019 - 3/19/2019 -3.29E-03 + 1.42E-02 2.08E-02 -3.68E-03 + 1.59E-02 2.32E-02 3/19/2019 - 3/26/2019 -1.42E-03 + 1.12E-02 1.71E-02 -1.59E-03 + 1.25E-02 1.92E-02 3/26/2019 - 4/2/2019 -5.33E-03 + 1.13E-02 1.68E-02 -6.02E-03 + 1.28E-02 1.90E-02 4/2/2019 - 4/9/2019 -2.80E-03 + 1.03E-02 1.56E-02 -3.12E-03 + 1.14E-02 1.73E-02 4/9/2019 - 4/16/2019 -4.09E-03 + 1.02E-02 1.53E-02 -4.53E-03 + 1.13E-02 1.70E-02 4/16/2019 - 4/23/2019 3.03E-03 + 9.28E-03 1.42E-02 2.91E-03 + 8.91E-03 1.36E-02 4/23/2019 - 4/30/2019 1.69E-03 + 7.89E-03 1.24E-02 1.66E-03 + 7.74E-03 1.21E-02 4/30/2019 - 5/7/2019 3.76E-03 + 1.03E-02 1.55E-02 3.76E-03 + 1.03E-02 1.55E-02 5/7/2019 - 5/14/2019 3.94E-03 + 7.74E-03 1.17E-02 3.89E-03 + 7.65E-03 1.15E-02 5/14/2019 - 5/21/2019 3.64E-03 + 1.24E-02 1.86E-02 3.70E-03 + 1.26E-02 1.89E-02 5/21/2019 - 5/28/2019 4.72E-03 + 9.42E-03 1.41E-02 4.63E-03 + 9.26E-03 1.38E-02 5/28/2019 - 6/4/2019 -4.16E-03 + 1.26E-02 1.89E-02 -4.02E-03 + 1.22E-02 1.83E-02 6/4/2019 - 6/11/2019 -8.01E-03 + 1.61E-02 2.36E-02 -7.68E-03 + 1.55E-02 2.27E-02 6/11/2019 - 6/18/2019 -7.03E-03 + 1.38E-02 2.02E-02 -6.82E-03 + 1.33E-02 1.96E-02 6/18/2019 - 6/25/2019 8.62E-04 + 1.31E-02 2.02E-02 8.30E-04 + 1.26E-02 1.94E-02 6/25/2019 - 7/2/2019 -2.49E-04 + 1.24E-02 1.92E-02 -2.34E-04 + 1.16E-02 1.80E-02 7/2/2019 - 7/9/2019 3.51E-03 + 1.28E-02 1.93E-02 3.26E-03 + 1.19E-02 1.79E-02 7/9/2019 - 7/16/2019 2.72E-03 + 1.20E-02 1.82E-02 2.85E-03 + 1.26E-02 1.91E-02 7/16/2019 - 7/23/2019 4.31E-03 + 1.31E-02 1.96E-02 4.52E-03 + 1.37E-02 2.05E-02 7/23/2019 - 7/30/2019 2.50E-03 + 1.03E-02 1.57E-02 2.61E-03 + 1.07E-02 1.64E-02 7/30/2019 - 8/6/2019 -6.64E-03 + 1.77E-02 2.62E-02 -6.78E-03 + 1.81E-02 2.68E-02 8/6/2019 - 8/13/2019 1.22E-03 + 1.49E-02 2.28E-02 1.25E-03 + 1.52E-02 2.33E-02 8/13/2019 - 8/20/2019 -7.44E-03 + 1.45E-02 2.12E-02 -7.60E-03 + 1.48E-02 2.17E-02 8/20/2019 - 8/27/2019 1.16E-03 + 1.20E-02 1.84E-02 1.16E-03 + 1.20E-02 1.84E-02 8/27/2019 - 9/3/2019 -5.15E-03 + 1.36E-02 2.03E-02 -5.09E-03 + 1.35E-02 2.00E-02 9/3/2019 - 9/10/2019 5.06E-03 + 1.22E-02 1.82E-02 4.95E-03 + 1.19E-02 1.78E-02 9/10/2019 - 9/17/2019 -3.99E-03 + 1.35E-02 2.03E-02 -3.90E-03 + 1.32E-02 1.98E-02 9/17/2019 - 9/24/2019 1.76E-03 + 1.39E-02 2.11E-02 1.71E-03 + 1.35E-02 2.06E-02 9/24/2019 - 10/1/2019 2.16E-03 + 1.21E-02 1.85E-02 1.73E-03 + 9.70E-03 1.48E-02 10/1/2019 - 10/8/2019 2.87E-03 + 1.13E-02 1.72E-02 2.71E-03 + 1.06E-02 1.62E-02 10/8/2019 - 10/15/2019 6.00E-03 + 1.18E-02 1.75E-02 5.61E-03 + 1.11E-02 1.64E-02 10/15/2019 - 10/22/2019 1.63E-03 + 1.21E-02 1.87E-02 1.45E-03 + 1.08E-02 1.67E-02 10/22/2019 - 10/29/2019 2.99E-03 + 1.08E-02 1.65E-02 2.82E-03 + 1.02E-02 1.56E-02 10/29/2019 - 11/5/2019 -6.27E-03 + 1.49E-02 2.20E-02 -5.85E-03 + 1.39E-02 2.05E-02 11/5/2019 - 11/12/2019 -7.99E-03 + 1.82E-02 2.68E-02 -7.01E-03 + 1.60E-02 2.35E-02 11/12/2019 - 11/19/2019 -4.17E-03 + 1.82E-02 2.74E-02 -3.57E-03 + 1.56E-02 2.35E-02 11/19/2019 - 11/26/2019 -4.07E-03 + 1.46E-02 2.17E-02 -4.19E-03 + 1.50E-02 2.24E-02 11/26/2019 - 12/3/2019 -5.48E-03 + 1.43E-02 2.12E-02 -5.60E-03 + 1.46E-02 2.17E-02 12/3/2019 - 12/10/2019 1.84E-03 + 9.69E-03 1.49E-02 1.85E-03 + 9.78E-03 1.51E-02 12/10/2019 - 12/17/2019 3.23E-03 + 1.14E-02 1.71E-02 3.24E-03 + 1.14E-02 1.72E-02 12/17/2019 - 12/23/2019 5.50E-03 + 1.21E-02 1.80E-02 5.41E-03 + 1.19E-02 1.77E-02 12/23/2019 - 12/31/2019 4.56E-03 + 1.55E-02 2.34E-02 4.39E-03 + 1.50E-02 2.25E-02 RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. 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 Collection Period RQ Activity Error MDA RQ Activity Error MDA 1/2/2019 - 1/8/2019 -5.06E-03 + 1.57E-02 2.27E-02 -5.05E-03 + 1.56E-02 2.27E-02 1/8/2019 - 1/15/2019 1.15E-03 + 1.19E-02 1.80E-02 1.12E-03 + 1.17E-02 1.76E-02 1/15/2019 - 1/22/2019 5.04E-03 + 1.18E-02 1.72E-02 4.99E-03 + 1.17E-02 1.70E-02 1/22/2019 - 1/29/2019 2.28E-03 + 1.21E-02 1.80E-02 2.27E-03 + 1.21E-02 1.79E-02 1/29/2019 - 2/6/2019 -9.88E-04 + 1.15E-02 1.71E-02 -9.82E-04 + 1.14E-02 1.70E-02

• • 2/6/2019 - 2/12/2019 -5.05E-03 + 1.25E-02 1.80E-02 0.00E+00 + 3.55E-03 2.60E-02

• • 2/12/2019 - 2/19/2019 -3.47E-03 + 3.00E-02 4.38E-02 -1.93E-03 + 1.67E-02 2.43E-02 2/19/2019 - 2/26/2019 -1.84E-03 + 1.32E-02 1.96E-02 -1.82E-03 + 1.31E-02 1.94E-02 2/26/2019 - 3/5/2019 3.23E-03 + 1.34E-02 1.98E-02 3.03E-03 + 1.26E-02 1.86E-02 3/5/2019 - 3/12/2019 -4.79E-03 + 1.43E-02 2.08E-02 -4.67E-03 + 1.39E-02 2.03E-02 3/12/2019 - 3/19/2019 4.42E-03 + 1.38E-02 2.02E-02 4.23E-03 + 1.32E-02 1.93E-02 3/19/2019 - 3/26/2019 9.35E-03 + 6.76E-03 1.40E-02 8.96E-03 + 6.48E-03 1.40E-02 3/26/2019 - 4/2/2019 -3.61E-03 + 1.35E-02 2.04E-02 -3.43E-03 + 1.29E-02 1.94E-02 4/2/2019 - 4/9/2019 7.51E-03 + 7.16E-03 9.80E-03 7.15E-03 + 6.82E-03 9.32E-03 4/9/2019 - 4/16/2019 1.50E-03 + 1.02E-02 1.60E-02 1.41E-03 + 9.61E-03 1.50E-02 4/16/2019 - 4/23/2019 0.00E+00 + 2.72E-03 1.95E-02 0.00E+00 + 2.82E-03 2.02E-02 4/23/2019 - 4/30/2019 8.70E-04 + 2.36E-03 5.40E-03 9.18E-04 + 2.49E-03 5.70E-03 4/30/2019 - 5/7/2019 5.45E-04 + 2.41E-03 5.88E-03 5.77E-04 + 2.55E-03 6.22E-03 5/7/2019 - 5/14/2019 5.85E-03 + 6.45E-03 9.08E-03 6.20E-03 + 6.84E-03 9.62E-03 5/14/2019 - 5/21/2019 3.44E-03 + 1.10E-02 1.66E-02 3.66E-03 + 1.16E-02 1.76E-02 5/21/2019 - 5/28/2019 -9.51E-04 + 1.27E-02 1.95E-02 -1.02E-03 + 1.36E-02 2.10E-02 5/28/2019 - 6/4/2019 1.03E-02 + 1.02E-02 1.43E-02 1.09E-02 + 1.09E-02 1.52E-02 6/4/2019 - 6/11/2019 -7.52E-03 + 1.46E-02 2.14E-02 -8.11E-03 + 1.58E-02 2.31E-02 6/11/2019 - 6/18/2019 -3.93E-03 + 1.19E-02 1.79E-02 -4.19E-03 + 1.27E-02 1.90E-02 6/18/2019 - 6/25/2019 -2.53E-03 + 1.34E-02 2.03E-02 -2.68E-03 + 1.42E-02 2.15E-02 6/25/2019 - 7/2/2019 2.96E-03 + 1.30E-02 1.97E-02 3.01E-03 + 1.33E-02 2.00E-02 7/2/2019 - 7/9/2019 4.87E-03 + 9.59E-03 1.43E-02 5.00E-03 + 9.85E-03 1.47E-02 7/9/2019 - 7/16/2019 5.34E-03 + 1.37E-02 2.04E-02 5.47E-03 + 1.41E-02 2.09E-02 7/16/2019 - 7/23/2019 -3.80E-04 + 1.35E-02 2.08E-02 -3.89E-04 + 1.38E-02 2.13E-02 7/23/2019 - 7/30/2019 0.00E+00 + 2.26E-03 1.83E-02 0.00E+00 + 2.30E-03 1.87E-02 7/30/2019 - 8/6/2019 -4.14E-03 + 1.64E-02 2.47E-02 -4.33E-03 + 1.72E-02 2.58E-02 8/6/2019 - 8/13/2019 -1.43E-03 + 1.19E-02 1.84E-02 -1.51E-03 + 1.26E-02 1.94E-02 8/13/2019 - 8/20/2019 5.36E-03 + 1.52E-02 2.26E-02 5.58E-03 + 1.58E-02 2.36E-02 8/20/2019 - 8/27/2019 3.54E-03 + 1.08E-02 1.63E-02 3.70E-03 + 1.13E-02 1.71E-02 8/27/2019 - 9/3/2019 -1.22E-03 + 1.22E-02 1.87E-02 -1.31E-03 + 1.31E-02 2.00E-02 9/3/2019 - 9/10/2019 1.90E-03 + 1.20E-02 1.83E-02 1.98E-03 + 1.25E-02 1.90E-02 9/10/2019 - 9/17/2019 -1.45E-03 + 1.20E-02 1.83E-02 -1.48E-03 + 1.22E-02 1.87E-02 9/17/2019 - 9/24/2019 -7.18E-03 + 1.40E-02 2.06E-02 -7.35E-03 + 1.44E-02 2.11E-02 9/24/2019 - 10/1/2019 -5.67E-03 + 1.39E-02 2.06E-02 -5.64E-03 + 1.38E-02 2.05E-02 10/1/2019 - 10/8/2019 -6.25E-03 + 1.36E-02 2.00E-02 -6.02E-03 + 1.31E-02 1.93E-02 10/8/2019 - 10/15/2019 -1.78E-03 + 1.23E-02 1.88E-02 -1.70E-03 + 1.18E-02 1.80E-02 10/15/2019 - 10/22/2019 -3.02E-03 + 1.62E-02 2.44E-02 -2.82E-03 + 1.51E-02 2.27E-02 10/22/2019 - 10/29/2019 5.40E-03 + 1.19E-02 1.78E-02 4.89E-03 + 1.08E-02 1.61E-02 10/29/2019 - 11/5/2019 -5.53E-03 + 1.57E-02 2.33E-02 -5.07E-03 + 1.44E-02 2.13E-02 11/5/2019 - 11/12/2019 -8.45E-03 + 1.68E-02 2.48E-02 -7.53E-03 + 1.50E-02 2.21E-02 11/12/2019 - 11/19/2019 1.51E-03 + 1.33E-02 2.04E-02 1.30E-03 + 1.14E-02 1.76E-02 11/19/2019 - 11/26/2019 6.57E-03 + 1.07E-02 1.57E-02 6.75E-03 + 1.10E-02 1.62E-02 11/26/2019 - 12/3/2019 3.07E-03 + 1.41E-02 2.11E-02 3.11E-03 + 1.42E-02 2.14E-02 12/3/2019 - 12/10/2019 -2.47E-03 + 1.16E-02 1.76E-02 -2.48E-03 + 1.17E-02 1.77E-02 12/10/2019 - 12/17/2019 -5.73E-03 + 1.41E-02 2.08E-02 -5.69E-03 + 1.40E-02 2.07E-02 12/17/2019 - 12/23/2019 -3.53E-03 + 1.68E-02 2.54E-02 -3.47E-03 + 1.66E-02 2.50E-02 12/23/2019 - 12/31/2019 -4.48E-03 + 1.65E-02 2.48E-02 -4.44E-03 + 1.64E-02 2.46E-02 RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. 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 Collection Period RQ Activity Error MDA RQ Activity Error MDA 1/2/2019 - 1/8/2019 -4.99E-03 + 1.54E-02 2.24E-02 -4.85E-03 + 1.50E-02 2.18E-02 1/8/2019 - 1/15/2019 1.11E-03 + 1.16E-02 1.75E-02 1.11E-03 + 1.16E-02 1.75E-02 1/15/2019 - 1/22/2019 4.90E-03 + 1.15E-02 1.67E-02 5.00E-03 + 1.18E-02 1.71E-02 1/22/2019 - 1/29/2019 2.22E-03 + 1.18E-02 1.75E-02 2.26E-03 + 1.20E-02 1.78E-02 1/29/2019 - 2/6/2019 -9.59E-04 + 1.11E-02 1.66E-02 -9.82E-04 + 1.14E-02 1.70E-02 2/6/2019 - 2/12/2019 5.84E-03 + 1.40E-02 2.03E-02 5.86E-03 + 1.41E-02 2.04E-02 2/12/2019 - 2/19/2019 -1.95E-03 + 1.69E-02 2.47E-02 -2.07E-03 + 1.79E-02 2.61E-02 2/19/2019 - 2/26/2019 -1.81E-03 + 1.30E-02 1.93E-02 -1.78E-03 + 1.28E-02 1.90E-02 2/26/2019 - 3/5/2019 2.99E-03 + 1.24E-02 1.83E-02 3.12E-03 + 1.29E-02 1.91E-02 3/5/2019 - 3/12/2019 -4.57E-03 + 1.36E-02 1.98E-02 -4.37E-03 + 1.30E-02 1.90E-02 3/12/2019 - 3/19/2019 4.20E-03 + 1.31E-02 1.92E-02 4.06E-03 + 1.27E-02 1.85E-02 3/19/2019 - 3/26/2019 9.00E-03 + 6.51E-03 1.40E-02 8.83E-03 + 6.39E-03 1.40E-02 3/26/2019 - 4/2/2019 -3.48E-03 + 1.30E-02 1.97E-02 -3.37E-03 + 1.26E-02 1.91E-02 4/2/2019 - 4/9/2019 7.12E-03 + 6.79E-03 9.28E-03 6.98E-03 + 6.66E-03 9.10E-03 4/9/2019 - 4/16/2019 1.39E-03 + 9.50E-03 1.48E-02 1.36E-03 + 9.28E-03 1.45E-02 4/16/2019 - 4/23/2019 0.00E+00 + 2.80E-03 2.00E-02 0.00E+00 + 2.72E-03 1.95E-02 4/23/2019 - 4/30/2019 9.20E-04 + 2.50E-03 5.71E-03 8.94E-04 + 2.43E-03 5.55E-03 4/30/2019 - 5/7/2019 5.87E-04 + 2.60E-03 6.33E-03 5.81E-04 + 2.57E-03 6.26E-03 5/7/2019 - 5/14/2019 6.25E-03 + 6.89E-03 9.70E-03 6.31E-03 + 6.96E-03 9.79E-03 5/14/2019 - 5/21/2019 3.66E-03 + 1.16E-02 1.76E-02 3.77E-03 + 1.20E-02 1.81E-02 5/21/2019 - 5/28/2019 -1.02E-03 + 1.35E-02 2.08E-02 -9.69E-04 + 1.29E-02 1.98E-02 5/28/2019 - 6/4/2019 1.09E-02 + 1.09E-02 1.52E-02 1.07E-02 + 1.06E-02 1.49E-02 6/4/2019 - 6/11/2019 -8.09E-03 + 1.57E-02 2.30E-02 -7.85E-03 + 1.53E-02 2.24E-02 6/11/2019 - 6/18/2019 -4.19E-03 + 1.27E-02 1.90E-02 -4.13E-03 + 1.25E-02 1.88E-02 6/18/2019 - 6/25/2019 -2.54E-03 + 1.34E-02 2.04E-02 -2.67E-03 + 1.41E-02 2.14E-02 6/25/2019 - 7/2/2019 3.09E-03 + 1.36E-02 2.05E-02 3.15E-03 + 1.39E-02 2.10E-02 7/2/2019 - 7/9/2019 8.81E-03 + 1.74E-02 2.59E-02 5.23E-03 + 1.03E-02 1.53E-02 7/9/2019 - 7/16/2019 5.48E-03 + 1.41E-02 2.10E-02 5.66E-03 + 1.46E-02 2.17E-02 7/16/2019 - 7/23/2019 -4.02E-04 + 1.43E-02 2.20E-02 -4.06E-04 + 1.44E-02 2.22E-02 7/23/2019 - 7/30/2019 0.00E+00 + 2.37E-03 1.93E-02 0.00E+00 + 2.41E-03 1.96E-02 7/30/2019 - 8/6/2019 -4.45E-03 + 1.76E-02 2.65E-02 -4.58E-03 + 1.81E-02 2.73E-02 8/6/2019 - 8/13/2019 -1.54E-03 + 1.29E-02 1.98E-02 -1.58E-03 + 1.32E-02 2.03E-02 8/13/2019 - 8/20/2019 5.78E-03 + 1.64E-02 2.44E-02 5.97E-03 + 1.69E-02 2.52E-02 8/20/2019 - 8/27/2019 3.85E-03 + 1.17E-02 1.77E-02 4.04E-03 + 1.23E-02 1.86E-02 8/27/2019 - 9/3/2019 -1.35E-03 + 1.35E-02 2.06E-02 -1.41E-03 + 1.41E-02 2.16E-02 9/3/2019 - 9/10/2019 2.07E-03 + 1.31E-02 1.99E-02 1.87E-03 + 1.18E-02 1.80E-02 9/10/2019 - 9/17/2019 -1.58E-03 + 1.30E-02 1.99E-02 -1.44E-03 + 1.19E-02 1.82E-02 9/17/2019 - 9/24/2019 -7.84E-03 + 1.53E-02 2.25E-02 -7.23E-03 + 1.41E-02 2.08E-02 9/24/2019 - 10/1/2019 -6.16E-03 + 1.51E-02 2.24E-02 -5.49E-03 + 1.35E-02 1.99E-02 10/1/2019 - 10/8/2019 -6.70E-03 + 1.45E-02 2.14E-02 -6.03E-03 + 1.31E-02 1.93E-02 10/8/2019 - 10/15/2019 -1.90E-03 + 1.32E-02 2.01E-02 -1.70E-03 + 1.18E-02 1.80E-02 10/15/2019 - 10/22/2019 -3.18E-03 + 1.70E-02 2.57E-02 -2.88E-03 + 1.55E-02 2.33E-02 10/22/2019 - 10/29/2019 5.48E-03 + 1.21E-02 1.80E-02 5.05E-03 + 1.11E-02 1.66E-02 10/29/2019 - 11/5/2019 -5.70E-03 + 1.62E-02 2.40E-02 -5.19E-03 + 1.47E-02 2.18E-02 11/5/2019 - 11/12/2019 -8.61E-03 + 1.72E-02 2.52E-02 -8.01E-03 + 1.60E-02 2.35E-02 11/12/2019 - 11/19/2019 1.52E-03 + 1.34E-02 2.07E-02 1.46E-03 + 1.28E-02 1.98E-02 11/19/2019 - 11/26/2019 6.60E-03 + 1.08E-02 1.58E-02 7.48E-03 + 1.22E-02 1.79E-02 11/26/2019 - 12/3/2019 3.06E-03 + 1.40E-02 2.11E-02 3.58E-03 + 1.64E-02 2.46E-02 12/3/2019 - 12/10/2019 -2.50E-03 + 1.17E-02 1.78E-02 -2.94E-03 + 1.38E-02 2.10E-02 12/10/2019 - 12/17/2019 -5.83E-03 + 1.43E-02 2.12E-02 -6.01E-03 + 1.47E-02 2.18E-02 12/17/2019 - 12/23/2019 -3.55E-03 + 1.69E-02 2.56E-02 -3.81E-03 + 1.82E-02 2.74E-02 12/23/2019 - 12/31/2019 -4.57E-03 + 1.69E-02 2.53E-02 -5.10E-03 + 1.88E-02 2.83E-02 RQ= Results Qualifer. If blank, result is less than detection limit. If "+", result is above detection limit.

• • Collection Period for ST-1 and 23: 2/6/19-2/15/19 and 2/15/19-2/19/19 due to inclement weather. 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 Activity Low High MDA Samples Positive IDs I-131 Ind 5.61E-05 -1.14E-02 1.39E-02 1.92E-02 572 0 I-131 Cntl 3.26E-04 -9.64E-03 1.22E-02 1.91E-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 12/31/18 - 01/31/19 3.52E-01 + 6.14E-01 2.15E+00 1.17E+00 + 6.67E-01 2.16E+00 01/31/19 - 03/04/19 -1.14E-01 + 6.32E-01 2.25E+00 1.42E-01 + 6.27E-01 2.25E+00 03/04/19 - 04/01/19 -5.46E-03 + 6.45E-01 2.33E+00 -2.78E-01 + 6.81E-01 2.42E+00 04/01/19 - 05/01/19 -1.38E+00 + 7.75E-01 2.48E+00 6.96E-01 + 7.13E-01 2.43E+00 05/01/19 - 05/30/19 -8.56E-01 + 6.42E-01 2.11E+00 3.73E-01 + 6.07E-01 2.11E+00 05/30/19 - 07/01/19 -5.23E-02 + 6.57E-01 2.36E+00 -1.31E-01 + 6.63E-01 2.36E+00 07/01/19 - 07/31/19 4.94E-01 + 5.87E-01 2.01E+00 8.09E-01 + 6.10E-01 2.02E+00 07/31/19 - 08/29/19 4.17E-01 + 6.59E-01 2.22E+00 1.76E-01 + 6.58E-01 2.35E+00 08/29/19 - 10/01/19 3.61E-01 + 4.27E-01 1.42E+00 1.80E+00 + 6.47E-01 1.89E+00 10/01/19 - 11/04/19 -1.67E-01 + 6.71E-01 2.38E+00 -4.29E-01 + 6.83E-01 2.38E+00 11/04/19 - 12/02/19 -4.10E-01 + 6.10E-01 2.11E+00 6.40E-01 + 6.30E-01 2.10E+00 12/02/19 - 01/02/20 -5.78E-01 + 6.11E-01 2.08E+00 -4.90E-01 + 5.97E-01 2.07E+00 ST- 27 CW Discharge Collection Period RQ Activity Error MDA 12/31/18 - 01/31/19 + 4.45E+00 + 9.56E-01 2.55E+00 01/31/19 - 03/04/19 + 9.60E+00 + 1.23E+00 2.65E+00 03/04/19 - 04/01/19 + 4.83E+00 + 1.08E+00 2.94E+00 04/01/19 - 05/01/19 + 7.06E+00 + 1.21E+00 2.99E+00 05/01/19 - 05/30/19 1.59E-01 + 6.79E-01 2.34E+00 05/30/19 - 07/01/19 6.09E-01 + 7.06E-01 2.41E+00 07/01/19 - 07/31/19 + 2.90E+00 + 7.77E-01 2.17E+00 07/31/19 - 08/29/19 + 6.17E+00 + 1.11E+00 2.74E+00 08/29/19 - 10/01/19 + 3.00E+00 + 6.82E-01 1.72E+00 10/01/19 - 11/04/19 + 6.12E+00 + 1.16E+00 3.00E+00 11/04/19 - 12/02/19 1.51E+00 + 7.55E-01 2.34E+00 12/02/19 - 01/02/20 9.15E-01 + 7.33E-01 2.38E+00 TABLE A-5.2 GROSS BETA IN WATER -

SUMMARY

Results in pCi per liter Number Number of Average Activity Activity of Positive Location Activity Low High Samples IDs ST- 26 Control -1.61E-01 -1.38E+00 4.94E-01 12 0 ST- 29 Indicator 3.73E-01 -4.90E-01 1.80E+00 12 0 ST- 27 Discharge 3.94E+00 1.59E-01 9.60E+00 12 8 RQ = Results Qualifier. If blank, 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 12/31/18 - 04/01/19 1.68E+02 + 9.43E+01 04/01/19 - 07/01/19 1.43E+02 + 8.97E+01 07/01/19 - 10/01/19 6.87E+01 + 9.14E+01 10/01/19 - 01/02/20 2.12E+02 + 9.24E+01 29 River/Drinking Indicator 12/31/18 - 04/01/19 9.87E+01 + 9.14E+01 04/01/19 - 07/01/19 1.46E+02 + 8.96E+01 07/01/19 - 10/01/19 1.09E+02 + 9.47E+01 10/01/19 - 01/02/20 1.46E+02 + 9.18E+01 27 Plant Discharge 12/31/18 - 04/01/19 1.45E+02 + 9.32E+01 04/01/19 - 07/01/19 1.51E+02 + 8.98E+01 07/01/19 - 10/01/19 1.28E+02 + 9.47E+01 10/01/19 - 01/02/20 1.65E+02 + 9.20E+01 31 Ground Water Well 1 03/06/19 -1.44E+02 + 9.36E+01 06/03/19 1.82E+02 + 9.06E+01 09/17/19 -2.14E+01 + 9.97E+01 12/04/19 4.45E+01 + 8.59E+01 32 Ground Water Well 2 03/06/19 1.14E+02 + 8.90E+01 06/03/19 9.29E+01 + 8.63E+01 09/17/19 -2.08E+01 + 9.70E+01 12/04/19 4.05E+01 + 8.84E+01 52 Ground Water Well 3 03/04/19 1.64E+02 + 9.32E+01 06/03/19 1.47E+02 + 8.85E+01 09/17/19 2.42E+01 + 9.79E+01 12/05/19 1.48E+02 + 8.84E+01 TABLE A-6.2 TRITIUM IN WATER - Summary Results in pCi per liter Number of Average Activity Activity Number of Positive Location Description Activity Low High Samples IDs River/Drinking Control 1.48E+02 6.87E+01 2.12E+02 4 0 River/Drinking Indicator 1.25E+02 9.87E+01 1.46E+02 4 0 Discharge Indicator 1.47E+02 1.28E+02 1.65E+02 4 0 Ground Water Indicator 6.43E+01 -1.44E+02 1.82E+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 1/31/2019 Location ST-26 collected 3/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 7.60E+01 + 4.69E+01 9.92E+01 K-40 1.47E+01 + 3.66E+01 5.19E+01 CR-51 -3.32E+01 + 5.64E+01 7.91E+01 CR-51 1.78E+01 + 2.69E+01 3.74E+01 MN-54 2.47E+00 + 3.96E+00 5.20E+00 MN-54 8.59E-01 + 2.89E+00 3.80E+00 CO-58 -1.41E+00 + 5.63E+00 7.58E+00 CO-58 -8.12E-01 + 3.22E+00 4.24E+00 FE-59 0.00E+00 + 4.70E+00 2.23E+01 FE-59 1.29E-01 + 9.49E+00 1.22E+01 CO-60 3.30E+00 + 4.43E+00 5.50E+00 CO-60 3.55E-01 + 2.35E+00 3.09E+00 ZN-65 -2.04E+00 + 1.09E+01 1.45E+01 ZN-65 -6.03E-01 + 5.96E+00 7.81E+00 ZRNB-95 5.03E+00 + 6.67E+00 8.86E+00 ZRNB-95 1.98E+00 + 5.14E+00 6.93E+00 I-131 6.28E+00 + 1.38E+01 1.98E+01 I-131 1.06E+00 + 7.09E+00 1.02E+01 CS-134 -9.50E-02 + 4.52E+00 6.49E+00 CS-134 1.97E-01 + 2.40E+00 3.37E+00 CS-137 0.00E+00 + 1.59E+00 7.89E+00 CS-137 1.71E+00 + 2.40E+00 3.16E+00 BALA140 2.43E+00 + 1.58E+01 2.04E+01 BALA140 -1.42E+00 + 8.13E+00 1.02E+01 BI-214 3.58E+00 + 1.22E+01 1.65E+01 BI-214 5.75E+00 + 3.95E+00 9.82E+00 Location ST-26 collected 4/1/2019 Location ST-26 collected 5/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.30E+01 + 3.92E+01 6.94E+01 K-40 1.79E+01 + 3.99E+01 5.47E+01 CR-51 -1.17E+00 + 2.88E+01 4.13E+01 CR-51 8.47E+00 + 2.75E+01 3.89E+01 MN-54 -1.42E+00 + 3.45E+00 4.47E+00 MN-54 8.39E-01 + 2.83E+00 3.71E+00 CO-58 -7.25E-02 + 3.33E+00 4.43E+00 CO-58 -1.39E+00 + 3.56E+00 4.62E+00 FE-59 0.00E+00 + 5.09E+00 1.32E+01 FE-59 -4.33E-01 + 7.25E+00 9.51E+00 CO-60 2.22E-02 + 3.06E+00 3.97E+00 CO-60 0.00E+00 + 1.38E+00 4.58E+00 ZN-65 2.40E-01 + 5.56E+00 7.37E+00 ZN-65 -2.12E+00 + 6.81E+00 8.71E+00 ZRNB-95 -4.42E+00 + 6.76E+00 8.86E+00 ZRNB-95 -3.82E+00 + 6.50E+00 8.56E+00 I-131 1.55E+00 + 6.28E+00 8.98E+00 I-131 6.79E+00 + 6.44E+00 8.76E+00 CS-134 -6.71E-01 + 2.74E+00 3.79E+00 CS-134 2.09E+00 + 2.07E+00 2.73E+00 CS-137 -2.00E+00 + 3.52E+00 4.63E+00 CS-137 -7.98E-01 + 3.11E+00 4.18E+00 BALA140 -4.08E+00 + 9.31E+00 1.13E+01 BALA140 0.00E+00 + 2.46E+00 1.24E+01 BI-214 1.36E+00 + 7.11E+00 1.02E+01 BI-214 3.69E+00 + 6.79E+00 9.68E+00 Location ST-26 collected 5/30/2019 Location ST-26 collected 7/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 6.65E+00 + 4.81E+01 6.90E+01 K-40 1.46E+01 + 4.63E+01 6.62E+01 CR-51 9.05E-01 + 3.42E+01 5.04E+01 CR-51 -1.29E+01 + 3.56E+01 5.17E+01 MN-54 -2.31E+00 + 3.90E+00 5.27E+00 MN-54 -2.13E+00 + 3.60E+00 4.88E+00 CO-58 -1.15E+00 + 3.65E+00 5.04E+00 CO-58 -4.54E-01 + 3.62E+00 5.06E+00 FE-59 1.99E+00 + 8.29E+00 1.12E+01 FE-59 3.58E+00 + 1.04E+01 1.37E+01 CO-60 -1.93E+00 + 3.51E+00 4.84E+00 CO-60 4.77E-01 + 3.08E+00 4.29E+00 ZN-65 -2.01E-01 + 7.15E+00 9.83E+00 ZN-65 1.75E+00 + 6.42E+00 8.74E+00 ZRNB-95 8.06E-01 + 6.08E+00 8.52E+00 ZRNB-95 1.99E-01 + 5.70E+00 8.07E+00 I-131 -6.18E+00 + 1.23E+01 1.77E+01 I-131 -2.25E-01 + 9.25E+00 1.37E+01 CS-134 8.80E-01 + 3.64E+00 6.16E+00 CS-134 -7.94E-01 + 3.08E+00 4.37E+00 CS-137 -1.15E+00 + 3.32E+00 4.72E+00 CS-137 -2.00E+00 + 3.76E+00 5.26E+00 BALA140 2.58E+00 + 8.85E+00 1.15E+01 BALA140 -5.82E+00 + 1.08E+01 1.36E+01 BI-214 + 1.38E+01 + 6.53E+00 7.85E+00 BI-214 3.60E+00 + 7.53E+00 1.09E+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 7/31/2019 Location ST-26 collected 8/29/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 -5.07E+01 + 4.03E+01 6.12E+01 K-40 -6.21E+00 + 3.38E+01 5.23E+01 CR-51 8.76E+00 + 3.28E+01 4.74E+01 CR-51 1.14E+01 + 3.45E+01 4.98E+01 MN-54 -1.41E-01 + 3.24E+00 4.33E+00 MN-54 -1.51E+00 + 3.20E+00 4.21E+00 CO-58 3.89E-01 + 2.91E+00 4.03E+00 CO-58 2.46E-01 + 3.13E+00 4.35E+00 FE-59 -1.39E+00 + 1.02E+01 1.30E+01 FE-59 1.08E+00 + 1.08E+01 1.39E+01 CO-60 4.48E-01 + 3.13E+00 4.02E+00 CO-60 4.68E-01 + 2.97E+00 3.82E+00 ZN-65 -1.85E+00 + 6.57E+00 8.53E+00 ZN-65 -1.45E+00 + 6.53E+00 8.52E+00 ZRNB-95 3.26E+00 + 5.22E+00 7.04E+00 ZRNB-95 2.59E+00 + 6.14E+00 8.35E+00 I-131 -7.52E-01 + 8.01E+00 1.17E+01 I-131 -6.83E+00 + 1.31E+01 1.88E+01 CS-134 -1.92E+00 + 3.41E+00 4.58E+00 CS-134 -1.90E+00 + 3.38E+00 4.54E+00 CS-137 -1.96E+00 + 3.51E+00 4.72E+00 CS-137 -7.38E-01 + 3.43E+00 4.68E+00 BALA140 -2.42E+00 + 8.14E+00 1.01E+01 BALA140 -9.28E+00 + 1.37E+01 1.65E+01 BI-214 5.07E+00 + 6.91E+00 9.79E+00 BI-214 -2.37E+00 + 6.46E+00 9.55E+00 Location ST-26 collected 10/1/2019 Location ST-26 collected 11/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.03E+01 + 3.70E+01 5.13E+01 K-40 -1.85E+00 + 4.27E+01 6.09E+01 CR-51 1.49E+00 + 3.57E+01 5.08E+01 CR-51 1.53E+01 + 3.71E+01 5.20E+01 MN-54 4.93E-01 + 3.23E+00 4.38E+00 MN-54 -1.82E+00 + 3.71E+00 4.90E+00 CO-58 5.78E-01 + 3.58E+00 4.84E+00 CO-58 -1.67E+00 + 3.70E+00 4.92E+00 FE-59 1.87E+00 + 1.00E+01 1.30E+01 FE-59 5.01E+00 + 9.15E+00 1.16E+01 CO-60 -9.77E-01 + 3.68E+00 4.73E+00 CO-60 7.48E-01 + 2.99E+00 3.90E+00 ZN-65 -3.99E+00 + 7.49E+00 9.65E+00 ZN-65 2.00E+00 + 8.20E+00 1.40E+01 ZRNB-95 2.15E+00 + 5.62E+00 7.76E+00 ZRNB-95 2.19E+00 + 5.71E+00 7.89E+00 I-131 2.15E+00 + 9.94E+00 1.41E+01 I-131 -9.06E-01 + 1.11E+01 1.58E+01 CS-134 -2.18E+00 + 3.74E+00 5.04E+00 CS-134 -1.94E+00 + 5.05E+00 8.43E+00 CS-137 -2.85E-01 + 3.21E+00 4.48E+00 CS-137 -2.11E+00 + 3.78E+00 5.12E+00 BALA140 -7.18E+00 + 1.09E+01 1.32E+01 BALA140 5.05E+00 + 7.80E+00 9.63E+00 BI-214 7.22E+00 + 9.57E+00 1.32E+01 BI-214 + 2.87E+01 + 8.68E+00 1.05E+01 Location ST-26 collected 12/2/2019 Location ST-26 collected 1/2/2020 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.11E+01 + 3.04E+01 4.64E+01 K-40 6.11E+00 + 3.94E+01 5.62E+01 CR-51 -1.01E+01 + 3.68E+01 5.18E+01 CR-51 -2.18E+01 + 4.11E+01 5.72E+01 MN-54 1.65E+00 + 2.57E+00 3.40E+00 MN-54 -1.31E+00 + 3.39E+00 4.51E+00 CO-58 -2.37E+00 + 3.96E+00 5.21E+00 CO-58 1.85E+00 + 3.41E+00 4.51E+00 FE-59 -1.87E+00 + 1.07E+01 1.38E+01 FE-59 -2.35E+00 + 1.12E+01 1.45E+01 CO-60 7.05E-01 + 3.22E+00 4.18E+00 CO-60 2.23E+00 + 2.53E+00 3.13E+00 ZN-65 -5.60E+00 + 8.78E+00 1.12E+01 ZN-65 -4.42E+00 + 8.66E+00 1.11E+01 ZRNB-95 -9.44E-01 + 6.05E+00 8.43E+00 ZRNB-95 0.00E+00 + 4.30E+00 9.26E+00 I-131 2.20E+00 + 9.64E+00 1.36E+01 I-131 -7.36E+00 + 1.35E+01 1.88E+01 CS-134 -2.40E-01 + 4.10E+00 6.95E+00 CS-134 -1.07E+00 + 3.21E+00 4.39E+00 CS-137 3.86E+00 + 3.17E+00 4.13E+00 CS-137 -2.11E+00 + 3.66E+00 4.94E+00 BALA140 -6.95E+00 + 1.05E+01 1.27E+01 BALA140 1.81E+00 + 8.55E+00 1.10E+01 BI-214 + 2.38E+01 + 7.21E+00 7.92E+00 BI-214 -1.40E+00 + 7.96E+00 1.15E+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 1/31/2019 Location ST-29 collected 3/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 4.17E+01 + 1.89E+01 2.35E+01 K-40 7.22E+00 + 4.33E+01 5.91E+01 CR-51 9.38E-03 + 3.19E-02 4.44E-02 CR-51 -3.28E+00 + 2.85E+01 4.08E+01 MN-54 -6.56E-01 + 1.05E+00 1.33E+00 MN-54 -4.29E-01 + 2.86E+00 3.79E+00 CO-58 -4.16E-02 + 2.11E-01 2.71E-01 CO-58 -1.16E+00 + 3.89E+00 5.06E+00 FE-59 -1.08E-01 + 1.66E-01 2.00E-01 FE-59 5.97E+00 + 9.54E+00 1.17E+01 CO-60 4.66E-01 + 1.39E+00 1.69E+00 CO-60 -2.43E-01 + 3.06E+00 3.95E+00 ZN-65 6.49E-01 + 1.62E+00 2.02E+00 ZN-65 3.74E+00 + 5.54E+00 6.96E+00 ZRNB-95 8.34E-02 + 2.89E-01 3.81E-01 ZRNB-95 4.13E+00 + 5.18E+00 6.75E+00 I-131 1.36E-11 + 7.93E-11 1.11E-10 I-131 -9.63E-01 + 8.80E+00 1.26E+01 CS-134 -3.78E-01 + 1.10E+00 1.48E+00 CS-134 2.09E+00 + 2.17E+00 2.87E+00 CS-137 -1.76E-01 + 1.31E+00 1.74E+00 CS-137 0.00E+00 + 4.67E-01 4.52E+00 BALA140 -5.62E-07 + 1.61E-06 1.92E-06 BALA140 0.00E+00 + 2.43E+00 1.25E+01 BI-214 2.31E+00 + 4.18E+00 5.13E+00 BI-214 3.72E+00 + 8.03E+00 9.86E+00 Location ST- 29 collected 4/1/2019 Location ST-29 collected 5/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.81E+00 + 4.25E+01 5.82E+01 K-40 3.70E+01 + 3.59E+01 4.93E+01 CR-51 -1.52E+00 + 2.98E+01 4.25E+01 CR-51 2.80E+00 + 3.47E+01 4.95E+01 MN-54 2.32E+00 + 2.73E+00 3.45E+00 MN-54 -2.00E+00 + 3.43E+00 4.39E+00 CO-58 8.23E-01 + 3.12E+00 4.11E+00 CO-58 1.93E+00 + 2.68E+00 3.44E+00 FE-59 1.24E-01 + 9.15E+00 1.18E+01 FE-59 3.27E+00 + 8.45E+00 1.07E+01 CO-60 1.52E+00 + 2.43E+00 3.02E+00 CO-60 2.31E+00 + 2.27E+00 2.70E+00 ZN-65 1.65E+00 + 5.58E+00 7.23E+00 ZN-65 -3.52E+00 + 7.89E+00 9.95E+00 ZRNB-95 1.73E+00 + 4.96E+00 6.70E+00 ZRNB-95 -8.54E-01 + 6.07E+00 8.27E+00 I-131 2.99E-01 + 7.57E+00 1.09E+01 I-131 -5.77E+00 + 1.45E+01 2.04E+01 CS-134 6.18E-01 + 2.63E+00 3.64E+00 CS-134 1.96E-01 + 2.60E+00 3.64E+00 CS-137 1.05E+00 + 2.49E+00 3.34E+00 CS-137 1.90E-01 + 2.87E+00 3.93E+00 BALA140 5.19E+00 + 5.96E+00 7.05E+00 BALA140 0.00E+00 + 1.38E+00 1.85E+01 BI-214 0.00E+00 + 6.58E+00 1.38E+01 BI-214 8.05E-02 + 1.43E+00 1.01E+01 Location ST-29 collected 5/30/2019 Location ST-29 collected 7/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.67E+01 + 3.54E+01 5.03E+01 K-40 1.78E+00 + 4.32E+01 6.06E+01 CR-51 3.68E+00 + 3.51E+01 4.99E+01 CR-51 2.67E+01 + 3.54E+01 4.89E+01 MN-54 6.99E-01 + 2.80E+00 3.79E+00 MN-54 7.53E-01 + 2.93E+00 3.95E+00 CO-58 1.33E+00 + 3.31E+00 4.43E+00 CO-58 -1.13E-01 + 3.67E+00 5.00E+00 FE-59 1.23E+01 + 8.29E+00 1.39E+01 FE-59 -8.36E+00 + 1.31E+01 1.63E+01 CO-60 1.69E+00 + 3.14E+00 3.98E+00 CO-60 -6.41E-01 + 3.67E+00 4.74E+00 ZN-65 -2.37E+00 + 7.46E+00 9.74E+00 ZN-65 -2.45E+00 + 7.61E+00 9.93E+00 ZRNB-95 -3.52E+00 + 6.73E+00 9.16E+00 ZRNB-95 1.99E+00 + 5.16E+00 7.17E+00 I-131 -7.81E+00 + 1.43E+01 1.99E+01 I-131 -4.16E+00 + 1.54E+01 2.17E+01 CS-134 -2.08E+00 + 3.85E+00 5.19E+00 CS-134 -1.53E+00 + 3.49E+00 4.74E+00 CS-137 -9.32E-01 + 3.32E+00 4.58E+00 CS-137 1.01E+00 + 3.33E+00 4.58E+00 BALA140 -1.15E+00 + 1.06E+01 1.35E+01 BALA140 -9.35E-02 + 1.08E+01 1.40E+01 BI-214 2.93E+00 + 8.91E+00 1.25E+01 BI-214 -1.26E-01 + 8.40E+00 1.20E+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 7/31/2019 Location ST-29 collected 8/31/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.07E+02 + 3.95E+01 3.70E+01 K-40 5.60E+00 + 4.36E+01 6.08E+01 CR-51 -2.00E+01 + 4.01E+01 5.78E+01 CR-51 2.04E+00 + 3.98E+01 5.66E+01 MN-54 -1.64E+00 + 3.68E+00 5.03E+00 MN-54 1.77E+00 + 3.50E+00 4.62E+00 CO-58 0.00E+00 + 0.00E+00 4.43E+00 CO-58 -1.58E+00 + 3.75E+00 5.00E+00 FE-59 2.97E+00 + 9.52E+00 1.27E+01 FE-59 -5.01E-01 + 1.06E+01 1.39E+01 CO-60 -2.48E-01 + 2.73E+00 3.95E+00 CO-60 1.03E-01 + 3.26E+00 4.29E+00 ZN-65 0.00E+00 + 4.13E+00 1.01E+01 ZN-65 -3.80E+00 + 7.58E+00 9.78E+00 ZRNB-95 0.00E+00 + 2.24E+00 8.67E+00 ZRNB-95 -2.03E-01 + 5.42E+00 7.70E+00 I-131 8.12E+00 + 1.09E+01 1.56E+01 I-131 3.30E+00 + 1.70E+01 2.42E+01 CS-134 -9.33E-01 + 3.19E+00 4.52E+00 CS-134 -1.89E+00 + 3.98E+00 6.64E+00 CS-137 3.71E-01 + 3.13E+00 4.51E+00 CS-137 7.39E-01 + 3.70E+00 5.10E+00 BALA140 6.25E-01 + 8.05E+00 1.09E+01 BALA140 7.20E-01 + 1.05E+01 1.38E+01 BI-214 7.00E+00 + 8.20E+00 1.16E+01 BI-214 + 1.72E+01 + 6.37E+00 7.19E+00 Location ST-29 collected 10/1/2019 Location ST-29 collected 11/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.44E+01 + 3.44E+01 4.86E+01 K-40 4.31E+00 + 4.58E+01 6.62E+01 CR-51 1.06E+01 + 3.24E+01 4.56E+01 CR-51 2.39E+01 + 3.34E+01 4.79E+01 MN-54 -2.91E-01 + 3.30E+00 4.46E+00 MN-54 9.95E-01 + 2.36E+00 3.27E+00 CO-58 -2.18E+00 + 3.87E+00 5.09E+00 CO-58 -4.51E-01 + 3.03E+00 4.27E+00 FE-59 2.85E-01 + 9.04E+00 1.19E+01 FE-59 -7.08E+00 + 1.17E+01 1.51E+01 CO-60 1.10E+00 + 2.77E+00 3.56E+00 CO-60 -2.30E-02 + 2.84E+00 4.04E+00 ZN-65 -5.53E+00 + 8.66E+00 1.10E+01 ZN-65 -9.35E-01 + 7.90E+00 1.07E+01 ZRNB-95 -2.51E+00 + 5.84E+00 8.01E+00 ZRNB-95 -4.07E+00 + 7.16E+00 9.70E+00 I-131 -2.89E+00 + 9.60E+00 1.35E+01 I-131 -1.55E+00 + 9.79E+00 1.44E+01 CS-134 -1.81E+00 + 3.35E+00 4.53E+00 CS-134 1.35E+00 + 3.84E+00 6.45E+00 CS-137 -2.00E+00 + 3.72E+00 5.04E+00 CS-137 2.22E+00 + 3.29E+00 4.57E+00 BALA140 3.71E+00 + 8.50E+00 1.06E+01 BALA140 -2.02E+00 + 9.51E+00 1.24E+01 BI-214 4.43E+00 + 7.44E+00 1.05E+01 BI-214 + 2.06E+01 + 5.31E+00 6.04E+00 Location ST-29 collected 12/2/2019 Location ST-29 collected 1/2/2020 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.04E+01 + 3.79E+01 5.37E+01 K-40 2.81E+01 + 4.13E+01 5.69E+01 CR-51 -6.36E+00 + 3.33E+01 4.89E+01 CR-51 1.91E+01 + 3.74E+01 5.23E+01 MN-54 -1.32E+00 + 2.91E+00 3.99E+00 MN-54 1.66E+00 + 2.95E+00 3.90E+00 CO-58 -3.26E-01 + 3.06E+00 4.31E+00 CO-58 9.47E-01 + 3.57E+00 4.81E+00 FE-59 5.40E+00 + 9.55E+00 1.24E+01 FE-59 -2.58E+00 + 1.12E+01 1.44E+01 CO-60 -3.32E-01 + 2.80E+00 3.99E+00 CO-60 2.34E-01 + 3.30E+00 4.33E+00 ZN-65 4.21E-01 + 5.08E+00 7.11E+00 ZN-65 -3.91E+00 + 7.78E+00 1.00E+01 ZRNB-95 3.44E+00 + 5.33E+00 7.24E+00 ZRNB-95 1.99E+00 + 5.57E+00 7.72E+00 I-131 2.01E+00 + 1.19E+01 1.75E+01 I-131 1.34E+00 + 1.32E+01 1.88E+01 CS-134 -1.76E+00 + 3.93E+00 6.57E+00 CS-134 3.87E-01 + 3.39E+00 4.67E+00 CS-137 2.69E-01 + 3.03E+00 4.37E+00 CS-137 8.41E-01 + 3.08E+00 4.27E+00 BALA140 3.53E-01 + 1.12E+01 1.47E+01 BALA140 -1.76E+00 + 1.09E+01 1.38E+01 BI-214 + 1.73E+01 + 4.86E+00 5.58E+00 BI-214 -1.12E+01 + 7.34E+00 1.13E+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 Number of Average Activity Activity Average Number of Positive Nuclide Activity Low High MDA Samples IDs K-40 Ind 2.75E+01 1.78E+00 1.07E+02 5.20E+01 12 2 K-40 Cntl 1.35E+01 -5.07E+01 7.60E+01 6.16E+01 12 0 CR-51 Ind 4.80E+00 -2.00E+01 2.67E+01 4.51E+01 12 0 CR-51 Cntl -1.26E+00 -3.32E+01 1.78E+01 5.07E+01 12 0 MN-54 Ind 1.55E-01 -2.00E+00 2.32E+00 3.83E+00 12 0 MN-54 Cntl -3.60E-01 -2.31E+00 2.47E+00 4.42E+00 12 0 CO-58 Ind -6.84E-02 -2.18E+00 1.93E+00 4.19E+00 12 0 CO-58 Cntl -5.22E-01 -2.37E+00 1.85E+00 4.90E+00 12 0 FE-59 Ind 9.77E-01 -8.36E+00 1.23E+01 1.21E+01 12 0 FE-59 Cntl 6.36E-01 -2.35E+00 5.01E+00 1.35E+01 12 0 CO-60 Ind 4.94E-01 -6.41E-01 2.31E+00 3.69E+00 12 0 CO-60 Cntl 4.88E-01 -1.93E+00 3.30E+00 4.17E+00 12 0 ZN-65 Ind -1.34E+00 -5.53E+00 3.74E+00 8.72E+00 12 0 ZN-65 Cntl -1.52E+00 -5.60E+00 2.00E+00 9.99E+00 12 0 ZRNB-95 Ind -6.82E-02 -5.53E+00 4.13E+00 7.54E+00 12 0 ZRNB-95 Cntl 2.40E-01 -4.42E+00 5.03E+00 8.37E+00 12 0 I-131 Ind -6.73E-01 -7.81E+00 8.12E+00 1.58E+01 12 0 I-131 Cntl -1.85E-01 -7.36E+00 6.79E+00 1.43E+01 12 0 CS-134 Ind -4.78E-01 -2.08E+00 2.09E+00 4.58E+00 12 0 CS-134 Cntl -6.37E-01 -2.18E+00 2.09E+00 5.07E+00 12 0 CS-137 Ind 2.98E-01 -2.00E+00 2.22E+00 4.21E+00 12 0 CS-137 Cntl -6.31E-01 -2.11E+00 3.86E+00 4.83E+00 12 0 BALA140 Ind 4.64E-01 -2.02E+00 5.19E+00 1.18E+01 12 0 BALA140 Cntl -2.11E+00 -9.28E+00 5.05E+00 1.27E+01 12 0 BI-214 Ind 5.35E+00 -1.12E+01 2.06E+01 9.63E+00 12 3 BI-214 Cntl 7.73E+00 -2.37E+00 2.87E+01 1.06E+01 12 3 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-8.1 GAMMA SPECTROMETRY RESULTS OF SOIL Results in pCi/kilogram Location and Date Station 7 6/11/2019 Location and Date Station ST-48 6/11/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 9.37E+01 + 2.70E+02 3.83E+02 BE-7 1.71E+02 + 3.22E+02 4.37E+02 K-40 + 1.35E+04 + 1.03E+03 4.19E+02 K-40 + 1.70E+04 + 1.14E+03 3.57E+02 CR-51 -1.54E+01 + 2.39E+02 3.56E+02 CR-51 -1.02E+02 + 3.40E+02 4.77E+02 MN-54 1.40E+01 + 2.96E+01 4.09E+01 MN-54 1.95E+01 + 3.13E+01 4.14E+01 CO-58 -3.48E+00 + 2.86E+01 4.06E+01 CO-58 -2.05E+00 + 3.25E+01 4.45E+01 FE-59 2.91E+00 + 9.06E+01 1.22E+02 FE-59 -1.32E+01 + 1.09E+02 1.40E+02 CO-60 -1.57E+01 + 4.19E+01 5.57E+01 CO-60 3.34E+01 + 2.86E+01 3.42E+01 ZN-65 1.94E+01 + 1.00E+02 1.70E+02 ZN-65 -6.02E+01 + 1.12E+02 1.87E+02 ZRNB-95 4.70E+00 + 4.96E+01 7.06E+01 ZRNB-95 -7.96E+00 + 6.52E+01 8.84E+01 CS-134 -1.67E+01 + 5.95E+01 9.98E+01 CS-134 -2.24E+01 + 6.15E+01 1.03E+02 CS-137 + 8.78E+01 + 3.71E+01 4.06E+01 CS-137 6.66E+01 + 4.37E+01 7.42E+01 BALA140 -1.54E+01 + 4.23E+01 5.48E+01 BALA140 -4.07E+01 + 5.82E+01 7.06E+01 BI-214 + 6.36E+02 + 8.99E+01 7.30E+01 BI-214 + 5.98E+02 + 9.93E+01 9.62E+01 Location and Date Station ST-8 6/11/2019 Location and Date Station 9A 6/11/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.01E+03 + 3.29E+02 3.66E+02 BE-7 + 8.27E+02 + 3.63E+02 4.18E+02 K-40 + 1.82E+04 + 1.43E+03 4.71E+02 K-40 + 1.58E+04 + 1.24E+03 3.45E+02 CR-51 -1.97E+02 + 4.02E+02 5.82E+02 CR-51 -7.34E+01 + 4.22E+02 5.98E+02 MN-54 2.33E+01 + 3.91E+01 5.37E+01 MN-54 -1.26E+00 + 5.02E+01 6.86E+01 CO-58 -1.39E+01 + 4.23E+01 5.91E+01 CO-58 -2.04E+01 + 4.70E+01 6.28E+01 FE-59 -2.72E+01 + 1.21E+02 1.63E+02 FE-59 -2.02E+01 + 1.23E+02 1.60E+02 CO-60 3.09E+01 + 3.77E+01 4.90E+01 CO-60 -4.32E+01 + 6.37E+01 7.93E+01 ZN-65 -1.45E+01 + 1.32E+02 2.27E+02 ZN-65 -6.10E+01 + 1.41E+02 2.37E+02 ZRNB-95 1.51E+01 + 7.94E+01 1.12E+02 ZRNB-95 3.56E+01 + 8.21E+01 1.10E+02 CS-134 -2.69E+01 + 8.45E+01 1.42E+02 CS-134 -2.37E+01 + 8.19E+01 1.37E+02 CS-137 + 9.47E+01 + 3.98E+01 4.59E+01 CS-137 + 8.58E+01 + 3.66E+01 4.39E+01 BALA140 -3.02E+01 + 6.02E+01 7.73E+01 BALA140 2.03E+01 + 4.27E+01 5.44E+01 BI-214 + 7.43E+02 + 1.23E+02 1.13E+02 BI-214 + 9.10E+02 + 1.22E+02 9.85E+01 Location and Date Station 23 6/11/2019 Nuclide RQ Activity Error MDA BE-7 9.95E+01 + 2.90E+02 4.13E+02 K-40 + 1.42E+04 + 1.11E+03 3.27E+02 CR-51 -3.50E+01 + 3.17E+02 4.67E+02 MN-54 -3.58E+00 + 3.82E+01 5.24E+01 CO-58 1.91E+01 + 2.55E+01 3.37E+01 FE-59 2.47E+01 + 8.47E+01 1.11E+02 CO-60 -5.23E+00 + 3.91E+01 5.18E+01 ZN-65 -5.80E+01 + 1.13E+02 1.89E+02 ZRNB-95 -1.42E+01 + 5.89E+01 8.28E+01 CS-134 -1.52E+01 + 5.75E+01 9.68E+01 CS-137 2.76E+01 + 5.19E+01 7.04E+01 BALA140 -3.18E+01 + 5.79E+01 7.14E+01 BI-214 + 4.14E+02 + 8.88E+01 9.09E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 1

TABLE A-8.2 GAMMA SPECTROMETRY RESULTS OF SOIL -

SUMMARY

Results in pCi/kilogram Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs BE-7 Ind 3.44E+02 9.37E+01 1.01E+03 4.00E+02 4 1 BE-7 Cntl 8.27E+02 8.27E+02 8.27E+02 4.18E+02 1 1 K-40 Ind 1.57E+04 1.35E+04 1.82E+04 3.93E+02 4 4 K-40 Cntl 1.58E+04 1.58E+04 1.58E+04 3.45E+02 1 1 CR-51 Ind -8.73E+01 -1.97E+02 -1.54E+01 4.71E+02 4 0 CR-51 Cntl -7.34E+01 -7.34E+01 -7.34E+01 5.98E+02 1 0 MN-54 Ind 1.33E+01 -3.58E+00 2.33E+01 4.71E+01 4 0 MN-54 Cntl -1.26E+00 -1.26E+00 -1.26E+00 6.86E+01 1 0 CO-58 Ind -9.92E-02 -1.39E+01 1.91E+01 4.45E+01 4 0 CO-58 Cntl -2.04E+01 -2.04E+01 -2.04E+01 6.28E+01 1 0 FE-59 Ind -3.22E+00 -2.72E+01 2.47E+01 1.34E+02 4 0 FE-59 Cntl -2.02E+01 -2.02E+01 -2.02E+01 1.60E+02 1 0 CO-60 Ind 1.09E+01 -1.57E+01 3.34E+01 4.77E+01 4 0 CO-60 Cntl -4.32E+01 -4.32E+01 -4.32E+01 7.93E+01 1 0 ZN-65 Ind -2.83E+01 -6.02E+01 1.94E+01 1.93E+02 4 0 ZN-65 Cntl -6.10E+01 -6.10E+01 -6.10E+01 2.37E+02 1 0 ZRNB-95 Ind -5.84E-01 -1.42E+01 1.51E+01 8.84E+01 4 0 ZRNB-95 Cntl 3.56E+01 3.56E+01 3.56E+01 1.10E+02 1 0 CS-134 Ind -2.03E+01 -2.69E+01 -1.52E+01 1.10E+02 4 0 CS-134 Cntl -2.37E+01 -2.37E+01 -2.37E+01 1.37E+02 1 0 CS-137 Ind 6.91E+01 2.76E+01 9.47E+01 5.78E+01 4 2 CS-137 Cntl 8.58E+01 8.58E+01 8.58E+01 4.39E+01 1 1 BALA140 Ind -2.95E+01 -4.07E+01 -1.54E+01 6.85E+01 4 0 BALA140 Cntl 2.03E+01 2.03E+01 2.03E+01 5.44E+01 1 0 BI-214 Ind 5.98E+02 4.14E+02 7.43E+02 9.32E+01 4 4 BI-214 Cntl 9.10E+02 9.10E+02 9.10E+02 9.85E+01 1 1 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 4/18/2019 Location & Date Station 34 10/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 7.94E+00 + 2.77E+02 3.88E+02 BE-7 5.68E+01 + 2.81E+02 4.02E+02 K-40 + 1.65E+04 + 1.08E+03 3.00E+02 K-40 + 1.35E+04 + 9.91E+02 3.32E+02 CR-51 1.17E+00 + 2.72E+02 3.90E+02 CR-51 -1.80E+02 + 3.54E+02 5.11E+02 MN-54 1.05E+01 + 3.02E+01 3.96E+01 MN-54 2.26E+00 + 3.09E+01 4.38E+01 CO-58 -8.79E+00 + 2.97E+01 3.92E+01 CO-58 -2.38E+00 + 2.92E+01 4.17E+01 FE-59 0.00E+00 + 4.01E+01 1.35E+02 FE-59 6.70E+01 + 7.81E+01 9.90E+01 CO-60 2.32E+01 + 2.52E+01 2.96E+01 CO-60 2.44E+01 + 2.86E+01 3.67E+01 ZN-65 7.53E+00 + 7.60E+01 9.58E+01 ZN-65 -4.94E+01 + 1.09E+02 1.82E+02 ZRNB-95 1.73E+01 + 5.23E+01 6.87E+01 ZRNB-95 1.46E+01 + 5.65E+01 7.90E+01 CS-134 2.47E+01 + 2.05E+01 2.58E+01 CS-134 -1.74E+01 + 5.94E+01 9.94E+01 CS-137 + 8.41E+01 + 3.75E+01 4.41E+01 CS-137 + 1.40E+02 + 3.31E+01 3.18E+01 BALA140 -1.20E+01 + 4.85E+01 5.91E+01 BALA140 -3.11E+01 + 6.24E+01 7.98E+01 BI-214 + 4.91E+02 + 8.68E+01 8.53E+01 BI-214 + 6.57E+02 + 9.17E+01 7.82E+01 Station 33 Upstream Control Location & Date Station 33 4/18/2019 Location & Date Station 33 10/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 8.05E+01 + 2.50E+02 3.45E+02 BE-7 -4.36E+01 + 3.36E+02 4.80E+02 K-40 + 1.61E+04 + 1.03E+03 2.74E+02 K-40 + 1.57E+04 + 1.11E+03 3.85E+02 CR-51 -6.55E+01 + 2.76E+02 3.91E+02 CR-51 2.95E+01 + 2.84E+02 4.21E+02 MN-54 1.63E+01 + 2.40E+01 3.08E+01 MN-54 5.89E+00 + 3.26E+01 4.57E+01 CO-58 -1.35E+00 + 2.90E+01 3.88E+01 CO-58 2.24E+01 + 2.27E+01 2.99E+01 FE-59 2.37E+01 + 8.91E+01 1.09E+02 FE-59 -4.80E+01 + 1.19E+02 1.55E+02 CO-60 0.00E+00 + 2.10E+01 4.90E+01 CO-60 -4.31E+00 + 3.63E+01 4.98E+01 ZN-65 2.70E+01 + 6.54E+01 8.11E+01 ZN-65 -2.11E+01 + 9.78E+01 1.67E+02 ZRNB-95 2.07E+01 + 5.21E+01 6.79E+01 ZRNB-95 -4.36E+00 + 6.12E+01 8.65E+01 CS-134 2.78E+00 + 2.67E+01 3.63E+01 CS-134 -3.87E+00 + 5.86E+01 9.89E+01 CS-137 3.46E+01 + 3.42E+01 4.39E+01 CS-137 1.76E+01 + 4.89E+01 6.68E+01 BALA140 0.00E+00 + 4.01E+00 5.44E+01 BALA140 -2.46E+01 + 6.05E+01 7.84E+01 BI-214 + 5.94E+02 + 9.09E+01 8.08E+01 BI-214 + 6.20E+02 + 9.20E+01 8.30E+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 Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs BE-7 Ind 3.24E+01 7.94E+00 5.68E+01 3.95E+02 2 0 BE-7 Cntl 1.84E+01 -4.36E+01 8.05E+01 4.13E+02 2 0 K-40 Ind 1.50E+04 1.35E+04 1.65E+04 3.16E+02 2 2 K-40 Cntl 1.59E+04 1.57E+04 1.61E+04 3.29E+02 2 2 CR-51 Ind -8.96E+01 -1.80E+02 1.17E+00 4.51E+02 2 0 CR-51 Cntl -1.80E+01 -6.55E+01 2.95E+01 4.06E+02 2 0 MN-54 Ind 6.39E+00 2.26E+00 1.05E+01 4.17E+01 2 0 MN-54 Cntl 1.11E+01 5.89E+00 1.63E+01 3.83E+01 2 0 CO-58 Ind -5.59E+00 -8.79E+00 -2.38E+00 4.04E+01 2 0 CO-58 Cntl 1.05E+01 -1.35E+00 2.24E+01 3.43E+01 2 0 FE-59 Ind 3.35E+01 0.00E+00 6.70E+01 1.17E+02 2 0 FE-59 Cntl -1.21E+01 -4.80E+01 2.37E+01 1.32E+02 2 0 CO-60 Ind 2.38E+01 2.32E+01 2.44E+01 3.31E+01 2 0 CO-60 Cntl -2.15E+00 -4.31E+00 0.00E+00 4.94E+01 2 0 ZN-65 Ind -2.10E+01 -4.94E+01 7.53E+00 1.39E+02 2 0 ZN-65 Cntl 2.93E+00 -2.11E+01 2.70E+01 1.24E+02 2 0 ZRNB-95 Ind 1.60E+01 1.46E+01 1.73E+01 7.38E+01 2 0 ZRNB-95 Cntl 8.17E+00 -4.36E+00 2.07E+01 7.72E+01 2 0 CS-134 Ind 3.64E+00 -1.74E+01 2.47E+01 6.26E+01 2 0 CS-134 Cntl -5.48E-01 -3.87E+00 2.78E+00 6.76E+01 2 0 CS-137 Ind 1.12E+02 8.41E+01 1.40E+02 3.79E+01 2 2 CS-137 Cntl 2.61E+01 1.76E+01 3.46E+01 5.53E+01 2 0 BALA140 Ind -2.15E+01 -3.11E+01 -1.20E+01 6.95E+01 2 0 BALA140 Cntl -1.23E+01 -2.46E+01 0.00E+00 6.64E+01 2 0 BI-214 Ind 5.74E+02 4.91E+02 6.57E+02 8.17E+01 2 2 BI-214 Cntl 6.07E+02 5.94E+02 6.20E+02 8.19E+01 2 2 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 & Collection Species Date Nuclide RQ Activity Error MDA Walleye 08/15/19 K-40 + 3.94E+03 + 3.45E+02 2.03E+02 Station 30 MN-54 6.37E+00 + 1.52E+01 2.02E+01 Indicator CO-58 3.61E+00 + 2.06E+01 2.77E+01 FE-59 9.66E+00 + 6.48E+01 8.36E+01 CO-60 7.17E+00 + 1.46E+01 1.85E+01 ZN-65 -2.34E+01 + 4.16E+01 5.32E+01 ZRNB-95 -2.03E+01 + 3.95E+01 5.21E+01 CS-134 -6.85E+00 + 1.75E+01 2.37E+01 CS-137 8.14E+00 + 1.85E+01 2.51E+01 Bi-214 2.02E+01 + 4.17E+01 5.83E+01 Bass 07/22/19 K-40 + 4.60E+03 + 4.30E+02 3.29E+02 Station 30 MN-54 -9.66E-01 + 2.00E+01 2.78E+01 Indicator CO-58 -1.28E+01 + 2.67E+01 3.61E+01 FE-59 2.44E+01 + 6.62E+01 8.60E+01 CO-60 -1.14E+01 + 2.21E+01 3.00E+01 ZN-65 -1.77E+01 + 4.94E+01 6.54E+01 ZRNB-95 1.97E+00 + 3.99E+01 5.54E+01 CS-134 -1.18E+01 + 2.65E+01 4.41E+01 CS-137 1.48E+01 + 1.81E+01 2.49E+01 Bi-214 + 1.53E+02 + 4.23E+01 4.95E+01 Salmon 10/22/19 K-40 + 3.06E+03 + 3.92E+02 2.63E+02 Station 30 MN-54 3.82E+00 + 1.36E+01 1.95E+01 Indicator CO-58 -6.57E+00 + 2.41E+01 3.38E+01 FE-59 2.60E+01 + 5.22E+01 7.00E+01 CO-60 -1.37E+01 + 2.31E+01 3.10E+01 ZN-65 1.76E+01 + 3.63E+01 4.93E+01 ZRNB-95 -3.34E+00 + 3.70E+01 5.31E+01 CS-134 -2.63E+00 + 1.66E+01 2.40E+01 CS-137 5.32E+00 + 2.13E+01 3.06E+01 Bi-214 3.44E+01 + 3.97E+01 5.70E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 2

TABLE A-10.1 GAMMA SPECTROMETRY RESULTS OF FISH Station 30 Columbia River - Station 38 Snake River Results in pCi/kilogram (wet)

Location & Collection Species Date Nuclide RQ Activity Error MDA Bass 07/28/19 K-40 + 4.29E+03 + 4.13E+02 3.29E+02 Station 38 MN-54 -5.03E+00 + 2.05E+01 2.81E+01 Control CO-58 9.23E+00 + 2.10E+01 2.85E+01 FE-59 2.66E+01 + 5.45E+01 7.05E+01 CO-60 5.44E+00 + 2.07E+01 2.76E+01 ZN-65 5.35E+00 + 4.06E+01 5.47E+01 ZRNB-95 9.02E-01 + 3.48E+01 4.85E+01 CS-134 1.04E+01 + 2.31E+01 3.86E+01 CS-137 1.31E+01 + 1.98E+01 2.74E+01 Bi-214 + 1.13E+02 + 3.66E+01 4.51E+01 Walleye 07/30/19 K-40 + 3.39E+03 + 3.49E+02 2.35E+02 Station 38 MN-54 6.84E+00 + 1.63E+01 2.18E+01 Control CO-58 -4.67E+00 + 1.72E+01 2.32E+01 FE-59 -2.23E+01 + 5.42E+01 6.88E+01 CO-60 7.70E+00 + 1.70E+01 2.16E+01 ZN-65 1.96E+00 + 3.88E+01 5.14E+01 ZRNB-95 -1.95E-01 + 2.91E+01 3.99E+01 CS-134 4.82E+00 + 2.07E+01 3.49E+01 CS-137 1.16E+01 + 1.81E+01 2.45E+01 Bi-214 + 1.13E+02 + 3.60E+01 3.90E+01 Salmon 10/22/19 K-40 + 3.26E+03 + 4.10E+02 2.63E+02 Station 38 MN-54 -4.79E-01 + 1.87E+01 2.62E+01 Control CO-58 1.37E+00 + 2.31E+01 3.22E+01 FE-59 -1.58E+01 + 8.03E+01 1.05E+02 CO-60 -7.18E+00 + 2.43E+01 3.14E+01 ZN-65 0.00E+00 + 2.76E+01 4.23E+01 ZRNB-95 2.10E+01 + 3.80E+01 5.10E+01 CS-134 -7.65E+00 + 2.37E+01 3.26E+01 CS-137 1.03E+01 + 1.74E+01 2.39E+01 Bi-214 2.92E+01 + 5.60E+01 7.92E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 2 of 2

TABLE A-10.2 GAMMA SPECTROMETRY RESULTS OF FISH -

SUMMARY

Results in pCi/kilogram (wet)

Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 Ind 3.87E+03 3.06E+03 4.60E+03 2.65E+02 3 3 K-40 Cntl 3.65E+03 3.26E+03 4.29E+03 2.76E+02 3 3 MN-54 Ind 3.07E+00 -9.66E-01 6.37E+00 2.25E+01 3 0 MN-54 Cntl 4.43E-01 -5.03E+00 6.84E+00 2.53E+01 3 0 CO-58 Ind -5.26E+00 -1.28E+01 3.61E+00 3.25E+01 3 0 CO-58 Cntl 1.98E+00 -4.67E+00 9.23E+00 2.80E+01 3 0 FE-59 Ind 2.00E+01 9.66E+00 2.60E+01 7.99E+01 3 0 FE-59 Cntl -3.85E+00 -2.23E+01 2.66E+01 8.15E+01 3 0 CO-60 Ind -5.98E+00 -1.37E+01 7.17E+00 2.65E+01 3 0 CO-60 Cntl 1.99E+00 -7.18E+00 7.70E+00 2.69E+01 3 0 ZN-65 Ind -7.83E+00 -2.34E+01 1.76E+01 5.60E+01 3 0 ZN-65 Cntl 2.43E+00 0.00E+00 5.35E+00 4.95E+01 3 0 ZRNB-95 Ind -7.21E+00 -2.03E+01 1.97E+00 5.35E+01 3 0 ZRNB-95 Cntl 7.25E+00 -1.95E-01 2.10E+01 4.65E+01 3 0 CS-134 Ind -7.10E+00 -1.18E+01 -2.63E+00 3.06E+01 3 0 CS-134 Cntl 2.53E+00 -7.65E+00 1.04E+01 3.54E+01 3 0 CS-137 Ind 9.42E+00 5.32E+00 1.48E+01 2.69E+01 3 0 CS-137 Cntl 1.16E+01 1.03E+01 1.31E+01 2.53E+01 3 0 Bi-214 Ind 6.92E+01 2.02E+01 1.53E+02 5.50E+01 3 1 Bi-214 Cntl 8.50E+01 2.92E+01 1.13E+02 5.44E+01 3 2 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE A-11.1 IODINE-131 IN MILK Results in pCi/liter, decay corrected to sample collection time Stations 36 & 36B Indicators Station 9B Control I-131 I-131 I-131 I-131 Collection Date RQ Activity Error MDA RQ Activity Error MDA 01/15/19 -6.91E-03 + 3.08E-01 3.60E-01 6.77E-02 + 2.16E-04 3.72E-01 02/12/19 4.34E-02 + 2.83E-01 3.31E-01 8.36E-02 + 2.88E-04 4.81E-01 03/12/19 1.46E-02 + 3.55E-01 4.98E-01 1.95E-01 + 5.24E-04 3.09E-01 04/09/19 1.58E-03 + 2.62E-01 3.08E-01 -4.63E-02 + 1.39E-04 3.50E-01 04/23/19 -3.51E-02 + 2.16E-01 3.13E-01 -1.68E-01 + 5.31E-04 3.65E-01 05/07/19 8.44E-02 + 2.62E-01 3.06E-01 -9.33E-02 + 2.95E-04 3.67E-01

• • 05/21/19 -1.49E-01 + 5.28E-01 6.14E-01 1.48E-01 + 3.88E-04 3.74E-01 06/04/19 -1.49E-01 + 2.83E-01 4.05E-01 -1.11E-01 + 3.85E-04 4.04E-01

• • 06/18/19 2.50E-01 + 3.50E-01 4.99E-01 -1.10E-01 + 3.68E-04 3.87E-01 07/09/19 -1.68E-01 + 3.38E-01 3.91E-01 -3.89E-02 + 1.08E-04 4.01E-01

• • 07/23/19 1.27E-02 + 2.99E-01 3.50E-01 3.78E-02 + 8.63E-05 3.31E-01 08/06/19 -2.05E-02 + 3.24E-01 3.78E-01 -3.33E-02 + 8.70E-05 3.78E-01

• • 08/20/19 1.36E-01 + 4.47E-01 5.20E-01 -7.03E-02 + 2.02E-04 4.15E-01 09/03/19 1.00E-01 + 2.60E-01 3.73E-01 -1.42E-01 + 4.78E-04 3.90E-01

• • 09/24/19 -5.02E-02 + 2.64E-01 3.82E-01 -2.41E-02 + 7.86E-05 3.82E-01 10/15/19 1.41E-01 + 3.17E-01 3.67E-01 4.32E-02 + 1.14E-04 3.82E-01 11/12/19 5.26E-02 + 2.50E-01 3.62E-01 1.58E-01 + 4.37E-04 3.95E-01 12/10/19 -5.84E-02 + 2.63E-01 3.81E-01 1.73E-02 + 5.47E-05 3.69E-01

• • Collection Date for ST-36B TABLE A-11.2 IODINE-131 IN MILK -

SUMMARY

Results in pCi/liter, decay corrected to sample collection time Number Average Activity Activity Average Number Positive Station Activity Low High MDA Samples IDs Indicator- ST 36 & 36B 1.11E-02 -1.68E-01 2.50E-01 3.97E-01 18 0 Control - ST-9B -4.77E-03 -1.68E-01 1.95E-01 3.81E-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 & 36B - Indicators Results in pCi/liter Location & Date Station 36 1/15/2019 Location & Date Station 36 2/12/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 2.26E+00 + 4.37E+00 6.21E+00 BA-133 1.71E+00 + 4.86E+00 6.99E+00 CO-60 1.11E+00 + 5.38E+00 7.02E+00 CO-60 4.78E+00 + 2.47E+00 5.10E+00 ZN-65 -5.00E+00 + 1.33E+01 1.70E+01 ZN-65 -1.11E+00 + 1.12E+01 1.50E+01 MN-54 3.74E+00 + 4.14E+00 5.23E+00 MN-54 -2.04E+00 + 5.99E+00 7.89E+00 CS-134 0.00E+00 + 2.19E+00 8.42E+00 CS-134 2.81E-01 + 4.81E+00 6.84E+00 CS-137 4.00E-01 + 5.18E+00 7.20E+00 CS-137 6.03E+00 + 4.94E+00 6.19E+00 BALA140 -5.70E-01 + 6.13E+00 8.01E+00 BALA140 -1.07E+00 + 7.54E+00 9.63E+00 K-40 + 1.55E+03 + 1.49E+02 6.98E+01 K-40 + 1.43E+03 + 1.50E+02 8.25E+01 FE-59 -5.32E+00 + 1.75E+01 2.20E+01 FE-59 3.30E+00 + 1.15E+01 1.50E+01 ZRNB-95 3.68E+00 + 6.40E+00 8.65E+00 ZRNB-95 -8.58E-01 + 9.42E+00 1.31E+01 BE-7 -7.17E-01 + 3.66E+01 5.23E+01 BE-7 1.52E+01 + 3.30E+01 4.59E+01 Location & Date Station 36 3/12/2019 Location & Date Station 36 4/9/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.01E-01 + 4.74E+00 6.99E+00 BA-133 9.31E-02 + 4.73E+00 7.20E+00 CO-60 -1.59E+00 + 6.93E+00 8.86E+00 CO-60 -1.56E-01 + 6.76E+00 9.02E+00 ZN-65 1.03E+01 + 6.61E+00 1.25E+01 ZN-65 6.64E+00 + 9.05E+00 1.17E+01 MN-54 1.81E+00 + 4.84E+00 6.43E+00 MN-54 -9.53E-01 + 5.03E+00 6.94E+00 CS-134 -3.19E+00 + 5.47E+00 7.45E+00 CS-134 -1.18E+00 + 4.38E+00 6.35E+00 CS-137 3.46E-01 + 4.95E+00 6.93E+00 CS-137 -1.96E+00 + 5.15E+00 7.18E+00 BALA140 7.72E-01 + 4.04E+00 5.61E+00 BALA140 0.00E+00 + 7.96E-01 8.14E+00 K-40 + 1.37E+03 + 1.45E+02 7.33E+01 K-40 + 1.51E+03 + 1.53E+02 7.93E+01 FE-59 3.34E+00 + 1.16E+01 1.52E+01 FE-59 -7.16E-01 + 1.44E+01 1.93E+01 ZRNB-95 2.40E+00 + 7.23E+00 1.00E+01 ZRNB-95 0.00E+00 + 4.25E+00 1.03E+01 BE-7 0.00E+00 + 1.50E+01 6.08E+01 BE-7 -4.49E+00 + 3.14E+01 4.62E+01 Location & Date Station 36 4/23/2019 Location & Date Station 36 5/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.55E+00 + 6.08E+00 8.61E+00 BA-133 7.22E-01 + 4.29E+00 6.49E+00 CO-60 -2.13E+00 + 6.65E+00 8.44E+00 CO-60 0.00E+00 + 3.83E+00 1.33E+01 ZN-65 -5.29E-01 + 1.23E+01 1.62E+01 ZN-65 9.22E+00 + 7.15E+00 1.37E+01 MN-54 -1.65E+00 + 5.17E+00 6.86E+00 MN-54 -1.78E+00 + 4.95E+00 6.73E+00 CS-134 8.04E-01 + 3.98E+00 5.65E+00 CS-134 2.34E+00 + 3.20E+00 4.48E+00 CS-137 1.76E+00 + 4.02E+00 5.50E+00 CS-137 0.00E+00 + 1.04E+00 7.21E+00 BALA140 1.40E+00 + 5.19E+00 6.77E+00 BALA140 0.00E+00 + 1.56E+00 9.06E+00 K-40 + 1.39E+03 + 1.45E+02 7.86E+01 K-40 + 1.48E+03 + 1.49E+02 7.71E+01 FE-59 1.16E+00 + 1.23E+01 1.62E+01 FE-59 5.57E+00 + 8.95E+00 1.16E+01 ZRNB-95 6.29E-02 + 7.10E+00 1.01E+01 ZRNB-95 2.01E+00 + 5.65E+00 8.11E+00 BE-7 -2.02E+01 + 3.95E+01 5.42E+01 BE-7 -6.20E+00 + 3.29E+01 4.80E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 6

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 36 & 36B - Indicators Results in pCi/liter Location & Date Station 36B 5/21/2019 Location & Date Station 36 6/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.99E+00 + 7.17E+00 1.01E+01 BA-133 -3.62E+00 + 8.24E+00 1.16E+01 CO-60 2.23E+00 + 5.47E+00 7.16E+00 CO-60 -1.01E+00 + 6.21E+00 8.25E+00 ZN-65 2.89E+00 + 1.35E+01 1.80E+01 ZN-65 -3.19E+00 + 1.34E+01 1.79E+01 MN-54 -1.38E-01 + 5.41E+00 7.55E+00 MN-54 2.94E+00 + 4.97E+00 6.64E+00 CS-134 -1.87E-01 + 5.50E+00 7.76E+00 CS-134 -1.86E-01 + 5.68E+00 8.01E+00 CS-137 -4.61E-01 + 5.72E+00 8.14E+00 CS-137 1.60E+00 + 5.65E+00 7.92E+00 BALA140 3.61E+00 + 5.87E+00 7.40E+00 BALA140 1.42E+00 + 5.48E+00 7.29E+00 K-40 + 1.53E+03 + 1.50E+02 6.60E+01 K-40 + 1.32E+03 + 1.41E+02 7.19E+01 FE-59 -2.64E+00 + 1.79E+01 2.35E+01 FE-59 -4.78E+00 + 1.79E+01 2.32E+01 ZRNB-95 7.91E-01 + 9.41E+00 1.34E+01 ZRNB-95 -2.35E+00 + 9.45E+00 1.33E+01 BE-7 -9.69E+00 + 4.63E+01 6.66E+01 BE-7 -8.10E+00 + 4.16E+01 6.01E+01 Location & Date Station 36B 6/18/2019 Location & Date Station 36 7/9/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 3.99E-01 + 5.57E+00 8.35E+00 BA-133 -3.09E+00 + 7.20E+00 1.05E+01 CO-60 4.12E+00 + 3.99E+00 5.20E+00 CO-60 2.73E-01 + 5.26E+00 7.48E+00 ZN-65 2.73E+00 + 1.05E+01 1.45E+01 ZN-65 -1.03E-01 + 1.34E+01 1.85E+01 MN-54 1.72E+00 + 4.50E+00 6.32E+00 MN-54 -2.10E+00 + 5.29E+00 7.35E+00 CS-134 1.62E+00 + 4.73E+00 6.77E+00 CS-134 4.73E-01 + 4.75E+00 6.90E+00 CS-137 -2.00E+00 + 5.95E+00 8.51E+00 CS-137 1.66E+00 + 5.13E+00 7.39E+00 BALA140 1.17E+00 + 6.51E+00 8.77E+00 BALA140 2.69E+00 + 4.44E+00 5.82E+00 K-40 + 1.96E+03 + 1.69E+02 7.30E+01 K-40 + 1.44E+03 + 1.52E+02 9.43E+01 FE-59 -9.64E+00 + 1.75E+01 2.27E+01 FE-59 -7.39E+00 + 1.70E+01 2.22E+01 ZRNB-95 -5.14E+00 + 9.63E+00 1.32E+01 ZRNB-95 -2.87E+00 + 9.77E+00 1.36E+01 BE-7 2.77E+00 + 4.03E+01 6.07E+01 BE-7 -2.33E+01 + 4.21E+01 6.13E+01 Location & Date Station 36B 7/23/2019 Location & Date Station 36 8/6/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.05E+00 + 6.40E+00 9.23E+00 BA-133 2.63E+00 + 7.52E+00 1.27E+01 CO-60 -1.31E+00 + 5.88E+00 7.55E+00 CO-60 3.16E+00 + 3.79E+00 5.13E+00 ZN-65 -1.99E+00 + 1.12E+01 1.47E+01 ZN-65 -9.29E+00 + 1.49E+01 1.97E+01 MN-54 -9.48E-01 + 4.93E+00 6.64E+00 MN-54 4.23E-01 + 4.69E+00 6.73E+00 CS-134 -7.77E-01 + 4.43E+00 6.11E+00 CS-134 2.38E-01 + 4.56E+00 6.68E+00 CS-137 -3.18E+00 + 6.03E+00 8.15E+00 CS-137 1.17E+00 + 5.19E+00 7.53E+00 BALA140 -6.39E-01 + 5.86E+00 7.56E+00 BALA140 1.16E+00 + 6.43E+00 8.66E+00 K-40 + 1.54E+03 + 1.29E+02 7.77E+01 K-40 + 1.25E+03 + 1.36E+02 7.99E+01 FE-59 -5.81E+00 + 1.58E+01 1.99E+01 FE-59 -1.38E-01 + 1.35E+01 1.86E+01 ZRNB-95 1.68E+00 + 7.28E+00 1.01E+01 ZRNB-95 -3.26E+00 + 1.04E+01 1.44E+01 BE-7 -1.68E+01 + 3.72E+01 5.22E+01 BE-7 0.00E+00 + 1.38E+01 4.96E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 2 of 6

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 36 & 36B - Indicators Results in pCi/liter Location & Date Station 36B 8/20/2019 Location & Date Station 36 9/3/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.86E+00 + 6.50E+00 9.48E+00 BA-133 -2.35E+00 + 6.03E+00 8.84E+00 CO-60 -3.01E+00 + 6.26E+00 8.59E+00 CO-60 6.63E-01 + 6.36E+00 8.84E+00 ZN-65 1.68E+00 + 1.04E+01 1.46E+01 ZN-65 -4.54E+00 + 1.48E+01 2.00E+01 MN-54 1.07E+00 + 4.64E+00 6.58E+00 MN-54 -6.62E-01 + 5.27E+00 7.50E+00 CS-134 -1.76E+00 + 4.94E+00 7.06E+00 CS-134 -3.46E+00 + 6.19E+00 8.67E+00 CS-137 -3.23E+00 + 6.13E+00 8.64E+00 CS-137 -2.98E+00 + 6.08E+00 8.61E+00 BALA140 1.73E+00 + 3.31E+00 4.54E+00 BALA140 -1.44E+00 + 7.34E+00 9.78E+00 K-40 + 1.32E+03 + 1.42E+02 8.22E+01 K-40 + 1.63E+03 + 1.61E+02 8.96E+01 FE-59 5.89E+00 + 1.05E+01 1.39E+01 FE-59 -4.75E+00 + 1.53E+01 2.05E+01 ZRNB-95 -6.04E+00 + 1.07E+01 1.46E+01 ZRNB-95 -7.56E-01 + 8.69E+00 1.24E+01 BE-7 -2.25E+01 + 4.61E+01 6.71E+01 BE-7 -2.02E+01 + 4.40E+01 6.44E+01 Location & Date Station 36B 9/24/2019 Location & Date Station 36 10/15/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.30E+00 + 7.59E+00 1.07E+01 BA-133 -3.03E+00 + 6.58E+00 9.27E+00 CO-60 8.77E-01 + 6.14E+00 8.18E+00 CO-60 -8.06E-01 + 6.02E+00 7.97E+00 ZN-65 -5.57E+00 + 1.64E+01 2.14E+01 ZN-65 -9.66E+00 + 1.54E+01 1.97E+01 MN-54 -4.02E+00 + 6.69E+00 8.84E+00 MN-54 -2.33E+00 + 6.36E+00 8.53E+00 CS-134 -2.21E+00 + 6.58E+00 9.04E+00 CS-134 -2.03E+00 + 5.78E+00 7.95E+00 CS-137 2.27E-01 + 4.94E+00 7.12E+00 CS-137 -1.87E+00 + 5.72E+00 7.95E+00 BALA140 -7.87E-02 + 6.07E+00 8.22E+00 BALA140 -4.61E-01 + 5.97E+00 8.01E+00 K-40 + 2.00E+03 + 1.75E+02 8.02E+01 K-40 + 1.48E+03 + 1.46E+02 7.69E+01 FE-59 -9.78E+00 + 1.82E+01 2.30E+01 FE-59 -3.36E+00 + 1.58E+01 2.06E+01 ZRNB-95 -2.33E+00 + 1.08E+01 1.51E+01 ZRNB-95 -3.61E-01 + 7.67E+00 1.11E+01 BE-7 -1.25E+01 + 4.16E+01 5.97E+01 BE-7 1.58E+01 + 3.39E+01 4.83E+01 Location & Date Station 36 11/12/2019 Location & Date Station 36 12/10/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.14E-01 + 7.26E+00 1.24E+01 BA-133 -3.12E+00 + 7.61E+00 1.11E+01 CO-60 1.64E+00 + 4.49E+00 5.97E+00 CO-60 -9.04E-01 + 6.21E+00 8.83E+00 ZN-65 -1.84E+00 + 1.33E+01 1.78E+01 ZN-65 -4.53E+00 + 1.48E+01 2.00E+01 MN-54 1.40E+00 + 3.80E+00 5.24E+00 MN-54 -3.59E+00 + 6.13E+00 8.36E+00 CS-134 -3.44E+00 + 5.96E+00 8.08E+00 CS-134 -2.31E+00 + 5.68E+00 8.06E+00 CS-137 0.00E+00 + 1.55E+00 7.69E+00 CS-137 2.58E+00 + 5.03E+00 7.17E+00 BALA140 1.33E+00 + 5.14E+00 6.84E+00 BALA140 -5.60E-01 + 5.91E+00 8.15E+00 K-40 + 1.38E+03 + 1.39E+02 6.97E+01 K-40 + 1.44E+03 + 1.59E+02 1.02E+02 FE-59 -1.54E+01 + 2.40E+01 2.98E+01 FE-59 -1.72E+00 + 1.66E+01 2.24E+01 ZRNB-95 -4.00E+00 + 8.65E+00 1.20E+01 ZRNB-95 7.54E-01 + 8.36E+00 1.20E+01 BE-7 1.37E+01 + 3.57E+01 5.11E+01 BE-7 -1.37E+01 + 3.94E+01 5.83E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 3 of 6

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 9B - Control Results in pCi/liter Collection Date: 1/15/2019 Collection Date: 2/12/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 2.77E+00 + 4.83E+00 6.83E+00 BA-133 -2.74E+00 + 5.90E+00 8.35E+00 CO-60 1.18E+00 + 5.71E+00 7.46E+00 CO-60 1.43E+00 + 4.98E+00 6.52E+00 ZN-65 0.00E+00 + 3.54E+00 2.15E+01 ZN-65 1.39E+00 + 1.03E+01 1.38E+01 MN-54 0.00E+00 + 2.70E+00 7.94E+00 MN-54 -8.85E-01 + 5.92E+00 7.91E+00 CS-134 -1.19E+00 + 4.35E+00 5.95E+00 CS-134 0.00E+00 + 3.18E+00 6.63E+00 CS-137 1.89E+00 + 4.56E+00 6.22E+00 CS-137 -7.30E-01 + 5.50E+00 7.60E+00 BALA140 0.00E+00 + 1.63E+00 7.21E+00 BALA140 3.33E+00 + 4.58E+00 5.66E+00 K-40 + 1.40E+03 + 1.46E+02 7.35E+01 K-40 + 1.38E+03 + 1.53E+02 9.37E+01 FE-59 -1.60E+00 + 1.45E+01 1.89E+01 FE-59 0.00E+00 + 3.65E+00 2.49E+01 ZRNB-95 1.20E+00 + 7.08E+00 9.98E+00 ZRNB-95 1.33E+00 + 8.18E+00 1.14E+01 BE-7 9.92E+00 + 3.43E+01 4.83E+01 BE-7 2.99E+01 + 3.33E+01 4.43E+01 Collection Date: 3/12/2019 Collection Date: 4/9/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -8.01E-01 + 5.21E+00 7.58E+00 BA-133 -7.28E-01 + 4.88E+00 7.13E+00 CO-60 -1.59E-01 + 4.80E+00 6.50E+00 CO-60 3.57E+00 + 4.42E+00 5.42E+00 ZN-65 6.66E+00 + 1.18E+01 1.50E+01 ZN-65 -5.50E-01 + 1.11E+01 1.48E+01 MN-54 1.34E+00 + 4.78E+00 6.42E+00 MN-54 2.28E-01 + 4.29E+00 5.93E+00 CS-134 -7.48E-01 + 4.67E+00 6.61E+00 CS-134 1.86E+00 + 4.72E+00 6.56E+00 CS-137 0.00E+00 + 2.34E+00 8.74E+00 CS-137 -1.48E+00 + 5.00E+00 6.86E+00 BALA140 0.00E+00 + 1.20E+00 1.22E+01 BALA140 0.00E+00 + 1.14E+00 1.06E+01 K-40 + 1.35E+03 + 1.45E+02 7.78E+01 K-40 + 1.34E+03 + 1.46E+02 8.21E+01 FE-59 3.46E+00 + 1.33E+01 1.72E+01 FE-59 9.21E+00 + 1.36E+01 1.69E+01 ZRNB-95 2.39E+00 + 7.22E+00 1.00E+01 ZRNB-95 -1.24E+00 + 9.36E+00 1.29E+01 BE-7 -1.91E+01 + 4.30E+01 5.92E+01 BE-7 8.27E+00 + 2.71E+01 3.87E+01 Collection Date: 4/23/2019 Collection Date: 5/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.10E+00 + 5.74E+00 8.18E+00 BA-133 -1.54E+00 + 5.13E+00 7.60E+00 CO-60 1.04E+00 + 4.00E+00 5.37E+00 CO-60 0.00E+00 + 1.19E+00 1.04E+01 ZN-65 -2.99E+00 + 1.20E+01 1.57E+01 ZN-65 -3.35E+00 + 1.21E+01 1.61E+01 MN-54 2.07E+00 + 4.09E+00 5.41E+00 MN-54 2.46E-01 + 3.99E+00 5.66E+00 CS-134 -1.19E+00 + 4.78E+00 6.70E+00 CS-134 1.38E+00 + 3.54E+00 5.11E+00 CS-137 1.62E+00 + 4.42E+00 6.06E+00 CS-137 -2.08E-01 + 4.36E+00 6.31E+00 BALA140 2.65E-01 + 5.21E+00 7.03E+00 BALA140 6.70E-02 + 3.51E+00 5.21E+00 K-40 + 1.33E+03 + 1.45E+02 8.17E+01 K-40 + 1.49E+03 + 1.49E+02 7.62E+01 FE-59 0.00E+00 + 4.07E+00 2.28E+01 FE-59 3.82E+00 + 1.04E+01 1.38E+01 ZRNB-95 0.00E+00 + 2.91E+00 1.17E+01 ZRNB-95 0.00E+00 + 2.06E+00 1.28E+01 BE-7 1.49E+00 + 3.93E+01 5.59E+01 BE-7 -7.09E+00 + 3.06E+01 4.48E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 4 of 6

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 9B - Control Results in pCi/liter Collection Date: 5/21/2019 Collection Date: 6/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.17E+00 + 7.49E+00 1.06E+01 BA-133 -3.21E+00 + 7.22E+00 1.05E+01 CO-60 -3.06E+00 + 7.96E+00 1.02E+01 CO-60 -2.84E+00 + 6.61E+00 9.05E+00 ZN-65 -2.67E+00 + 1.35E+01 1.80E+01 ZN-65 -8.12E+00 + 1.47E+01 1.95E+01 MN-54 2.30E+00 + 3.95E+00 5.33E+00 MN-54 2.15E-01 + 4.18E+00 6.08E+00 CS-134 4.12E+00 + 4.63E+00 6.17E+00 CS-134 -2.85E+00 + 6.51E+00 1.09E+01 CS-137 -2.30E-01 + 4.96E+00 7.16E+00 CS-137 1.71E-01 + 5.17E+00 7.63E+00 BALA140 -1.21E+00 + 7.10E+00 9.31E+00 BALA140 1.95E+00 + 3.35E+00 4.52E+00 K-40 + 1.50E+03 + 1.56E+02 8.78E+01 K-40 + 1.49E+03 + 1.51E+02 8.63E+01 FE-59 1.32E+00 + 1.43E+01 1.92E+01 FE-59 5.61E-01 + 1.38E+01 1.90E+01 ZRNB-95 -2.77E+00 + 8.63E+00 1.22E+01 ZRNB-95 -2.21E+00 + 9.44E+00 1.33E+01 BE-7 2.73E+00 + 3.79E+01 5.57E+01 BE-7 3.61E+00 + 3.63E+01 5.49E+01 Collection Date: 6/18/2019 Collection Date: 7/9/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.94E+00 + 7.13E+00 1.01E+01 BA-133 -3.40E+00 + 7.60E+00 1.07E+01 CO-60 -2.52E+00 + 7.49E+00 9.66E+00 CO-60 3.27E+00 + 5.23E+00 6.68E+00 ZN-65 -7.47E+00 + 1.48E+01 1.92E+01 ZN-65 -6.32E+00 + 1.34E+01 1.75E+01 MN-54 6.38E-01 + 5.97E+00 8.21E+00 MN-54 -9.88E-01 + 5.99E+00 8.18E+00 CS-134 -3.57E+00 + 6.20E+00 8.42E+00 CS-134 2.55E+00 + 4.47E+00 6.12E+00 CS-137 2.28E-01 + 5.91E+00 8.42E+00 CS-137 1.72E+00 + 4.82E+00 6.75E+00 BALA140 5.59E-01 + 4.45E+00 6.21E+00 BALA140 -3.78E-01 + 6.55E+00 8.70E+00 K-40 + 1.18E+03 + 1.36E+02 8.07E+01 K-40 + 1.08E+03 + 1.29E+02 8.03E+01 FE-59 2.76E+00 + 1.43E+01 1.89E+01 FE-59 4.79E+00 + 1.17E+01 1.54E+01 ZRNB-95 1.96E+00 + 6.98E+00 1.00E+01 ZRNB-95 -3.70E+00 + 9.31E+00 1.29E+01 BE-7 1.26E+01 + 4.10E+01 5.89E+01 BE-7 8.49E+00 + 3.67E+01 5.32E+01 Collection Date: 7/23/2019 Collection Date: 8/6/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.29E+00 + 7.55E+00 1.10E+01 BA-133 -1.01E+00 + 5.03E+00 7.36E+00 CO-60 -2.78E-01 + 6.27E+00 8.84E+00 CO-60 1.20E+00 + 4.62E+00 5.99E+00 ZN-65 -1.73E+00 + 1.18E+01 1.64E+01 ZN-65 5.86E+00 + 9.57E+00 1.23E+01 MN-54 1.99E+00 + 4.67E+00 6.52E+00 MN-54 8.66E-01 + 4.48E+00 6.04E+00 CS-134 8.53E-01 + 3.87E+00 5.67E+00 CS-134 -1.26E+00 + 4.20E+00 5.75E+00 CS-137 -2.23E+00 + 5.81E+00 8.31E+00 CS-137 1.42E+00 + 4.61E+00 6.35E+00 BALA140 -3.38E-01 + 5.40E+00 7.62E+00 BALA140 2.36E+00 + 5.77E+00 7.22E+00 K-40 + 1.43E+03 + 1.52E+02 9.00E+01 K-40 + 1.31E+03 + 1.17E+02 7.39E+01 FE-59 -9.90E+00 + 1.60E+01 2.08E+01 FE-59 3.53E+00 + 1.35E+01 1.73E+01 ZRNB-95 3.82E+00 + 6.19E+00 8.58E+00 ZRNB-95 -1.12E+00 + 6.92E+00 9.66E+00 BE-7 -8.65E+00 + 3.89E+01 5.81E+01 BE-7 -1.13E+01 + 3.64E+01 5.14E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 5 of 6

TABLE A-12.1 GAMMA SPECTROMETRY RESULTS OF MILK STATION 9B - Control Results in pCi/liter Collection Date: 8/20/2019 Collection Date: 9/3/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.91E+00 + 5.85E+00 8.44E+00 BA-133 -4.01E+00 + 9.24E+00 1.29E+01 CO-60 4.07E+00 + 4.69E+00 5.78E+00 CO-60 -2.36E+00 + 7.19E+00 9.32E+00 ZN-65 -8.71E+00 + 1.37E+01 1.75E+01 ZN-65 -8.23E+00 + 1.64E+01 2.12E+01 MN-54 1.53E+00 + 4.51E+00 6.04E+00 MN-54 1.24E+00 + 5.51E+00 7.55E+00 CS-134 -3.07E+00 + 5.48E+00 7.39E+00 CS-134 4.12E+00 + 4.34E+00 5.75E+00 CS-137 1.80E+00 + 5.05E+00 6.92E+00 CS-137 -9.22E-01 + 5.15E+00 7.33E+00 BALA140 -4.98E+00 + 7.45E+00 9.06E+00 BALA140 5.68E-01 + 4.52E+00 6.31E+00 K-40 + 1.57E+03 + 1.31E+02 7.82E+01 K-40 + 1.39E+03 + 1.48E+02 7.96E+01 FE-59 1.82E+00 + 1.30E+01 1.68E+01 FE-59 7.79E+00 + 1.17E+01 1.50E+01 ZRNB-95 1.19E+00 + 7.87E+00 1.10E+01 ZRNB-95 -1.19E+00 + 9.15E+00 1.30E+01 BE-7 -2.21E+01 + 4.15E+01 5.79E+01 BE-7 -1.15E+01 + 4.14E+01 5.96E+01 Collection Date: 9/24/2019 Collection Date: 10/15/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -3.11E+00 + 7.15E+00 1.01E+01 BA-133 -3.12E+00 + 6.98E+00 9.82E+00 CO-60 1.87E+00 + 5.32E+00 7.02E+00 CO-60 1.57E+00 + 5.38E+00 7.10E+00 ZN-65 -1.63E+00 + 1.47E+01 1.96E+01 ZN-65 -3.77E+00 + 1.43E+01 1.89E+01 MN-54 -6.33E-01 + 6.44E+00 8.82E+00 MN-54 3.12E+00 + 3.73E+00 4.88E+00 CS-134 -3.73E+00 + 6.46E+00 8.76E+00 CS-134 1.71E-01 + 4.69E+00 6.65E+00 CS-137 -1.58E+00 + 6.07E+00 8.49E+00 CS-137 2.85E+00 + 5.05E+00 6.93E+00 BALA140 1.50E+00 + 6.29E+00 8.27E+00 BALA140 1.55E-01 + 4.24E+00 6.01E+00 K-40 + 1.39E+03 + 1.49E+02 8.56E+01 K-40 + 1.36E+03 + 1.35E+02 6.03E+01 FE-59 9.24E+00 + 1.48E+01 1.88E+01 FE-59 -1.22E+00 + 1.41E+01 1.88E+01 ZRNB-95 0.00E+00 + 3.89E+00 1.19E+01 ZRNB-95 7.31E-01 + 6.76E+00 9.84E+00 BE-7 1.70E+01 + 3.64E+01 5.18E+01 BE-7 -2.35E+01 + 4.23E+01 5.95E+01 Collection Date: 11/12/2019 Collection Date: 12/10/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BA-133 -2.65E+00 + 7.53E+00 1.27E+01 BA-133 -3.71E+00 + 8.74E+00 1.47E+01 CO-60 -1.75E-01 + 5.25E+00 7.13E+00 CO-60 -5.59E-01 + 6.47E+00 8.61E+00 ZN-65 -1.09E+01 + 1.72E+01 2.20E+01 ZN-65 5.20E+00 + 1.28E+01 1.69E+01 MN-54 4.37E+00 + 4.12E+00 5.25E+00 MN-54 -4.19E+00 + 6.97E+00 9.19E+00 CS-134 -3.60E+00 + 6.24E+00 8.45E+00 CS-134 3.42E+00 + 6.83E+00 1.14E+01 CS-137 -3.36E+00 + 6.50E+00 8.88E+00 CS-137 1.57E+00 + 6.19E+00 8.65E+00 BALA140 -1.57E+00 + 6.95E+00 9.05E+00 BALA140 -5.49E-01 + 5.31E+00 7.24E+00 K-40 + 1.28E+03 + 1.37E+02 7.80E+01 K-40 + 1.41E+03 + 1.48E+02 8.40E+01 FE-59 6.43E+00 + 1.29E+01 1.67E+01 FE-59 -1.47E+01 + 2.31E+01 2.87E+01 ZRNB-95 -1.47E+00 + 9.36E+00 1.32E+01 ZRNB-95 6.56E+00 + 7.75E+00 1.04E+01 BE-7 7.90E+00 + 3.91E+01 5.66E+01 BE-7 5.91E+00 + 3.81E+01 5.55E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 6 of 6

TABLE A-12.2 GAMMA SPECTROMETRY RESULTS OF MILK -

SUMMARY

Results in pCi/liter Number Number of Average Activity Activity Average of Positive Nuclide Activity Low High MDA Samples IDs BA-133 Ind -1.20E+00 -3.62E+00 2.63E+00 8.77E+00 18 0 BA-133 Cntl -2.32E+00 -4.01E+00 2.77E+00 9.18E+00 18 0 CO-60 Ind 4.40E-01 -3.01E+00 4.78E+00 7.83E+00 18 0 CO-60 Cntl 4.04E-01 -3.06E+00 4.07E+00 7.21E+00 18 0 ZN-65 Ind -7.72E-01 -9.66E+00 1.03E+01 1.68E+01 18 0 ZN-65 Cntl -2.63E+00 -1.09E+01 6.66E+00 1.66E+01 18 0 MN-54 Ind -3.94E-01 -4.02E+00 3.74E+00 7.02E+00 18 0 MN-54 Cntl 7.48E-01 -4.19E+00 4.37E+00 6.39E+00 18 0 CS-134 Ind -8.31E-01 -3.46E+00 2.34E+00 7.24E+00 18 0 CS-134 Cntl -1.52E-01 -3.73E+00 4.12E+00 6.79E+00 18 0 CS-137 Ind 4.99E-03 -3.23E+00 6.03E+00 7.50E+00 18 0 CS-137 Cntl 1.40E-01 -3.36E+00 2.85E+00 7.03E+00 18 0 BALA140 Ind 5.81E-01 -1.44E+00 3.61E+00 7.68E+00 18 0 BALA140 Cntl 9.63E-02 -4.98E+00 3.33E+00 7.23E+00 18 0 K-40 Ind 1.50E+03 1.25E+03 2.00E+03 7.91E+01 18 18 K-40 Cntl 1.37E+03 1.08E+03 1.57E+03 7.63E+01 18 18 FE-59 Ind -2.90E+00 -1.54E+01 5.89E+00 2.00E+01 18 0 FE-59 Cntl 1.52E+00 -1.47E+01 9.24E+00 1.79E+01 18 0 ZRNB-95 Ind -9.22E-01 -6.04E+00 3.68E+00 1.20E+01 18 0 ZRNB-95 Cntl 3.04E-01 -3.70E+00 6.56E+00 1.08E+01 18 0 BE-7 Ind -6.16E+00 -2.33E+01 1.58E+01 5.59E+01 18 0 BE-7 Cntl 2.47E-01 -2.35E+01 2.99E+01 5.08E+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 1/31/2019 Location ST-27 collected 3/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 -5.64E+00 + 6.12E+01 7.53E+01 K-40 2.82E+01 + 3.47E+01 4.90E+01 CR-51 5.17E+00 + 4.29E+01 6.36E+01 CR-51 -9.62E+00 + 3.35E+01 4.73E+01 MN-54 4.14E+00 + 3.33E+00 4.17E+00 MN-54 2.32E-01 + 3.05E+00 4.05E+00 CO-58 -1.47E+00 + 4.64E+00 6.27E+00 CO-58 8.20E-01 + 2.77E+00 3.67E+00 FE-59 -8.29E+00 + 1.87E+01 2.31E+01 FE-59 4.57E-01 + 9.04E+00 1.17E+01 CO-60 5.66E-01 + 3.94E+00 5.12E+00 CO-60 6.43E-01 + 2.65E+00 3.41E+00 ZN-65 0.00E+00 + 1.78E+00 1.34E+01 ZN-65 -3.63E+00 + 8.12E+00 1.02E+01 ZRNB-95 -2.24E+00 + 8.40E+00 1.14E+01 ZRNB-95 7.54E-01 + 5.82E+00 7.93E+00 I-131 -3.51E+00 + 1.66E+01 2.37E+01 I-131 -2.18E+00 + 8.82E+00 1.25E+01 CS-134 0.00E+00 + 1.95E+00 4.72E+00 CS-134 -1.98E-01 + 2.62E+00 3.66E+00 CS-137 2.75E-01 + 3.64E+00 5.17E+00 CS-137 -1.12E-01 + 2.82E+00 3.86E+00 BALA140 3.67E+00 + 1.46E+01 1.80E+01 BALA140 5.05E+00 + 6.57E+00 7.87E+00 BI-214 0.00E+00 + 8.45E+00 1.77E+01 BI-214 1.52E+00 + 4.38E+00 9.95E+00 Location ST-27 collected 4/1/2019 Location ST-27 collected 5/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.34E+01 + 4.29E+01 5.78E+01 K-40 2.46E+01 + 4.48E+01 6.28E+01 CR-51 1.27E+01 + 2.63E+01 3.69E+01 CR-51 -8.70E+00 + 2.92E+01 4.28E+01 MN-54 0.00E+00 + 7.91E-01 5.16E+00 MN-54 5.99E-01 + 2.47E+00 3.39E+00 CO-58 -6.73E-01 + 3.05E+00 4.04E+00 CO-58 5.11E-01 + 2.47E+00 3.42E+00 FE-59 7.09E+00 + 8.01E+00 9.65E+00 FE-59 3.23E+00 + 9.59E+00 1.24E+01 CO-60 1.33E+00 + 2.96E+00 3.70E+00 CO-60 1.49E+00 + 2.75E+00 3.52E+00 ZN-65 4.33E+00 + 5.23E+00 6.48E+00 ZN-65 2.54E-01 + 6.73E+00 9.04E+00 ZRNB-95 1.28E-01 + 5.45E+00 7.50E+00 ZRNB-95 -5.96E-01 + 5.28E+00 7.47E+00 I-131 9.63E-01 + 7.06E+00 1.01E+01 I-131 -4.30E+00 + 7.98E+00 1.15E+01 CS-134 4.74E-01 + 2.47E+00 3.45E+00 CS-134 -2.16E-01 + 2.32E+00 3.37E+00 CS-137 -4.64E-01 + 3.01E+00 4.08E+00 CS-137 2.51E+00 + 2.37E+00 3.12E+00 BALA140 -6.60E-01 + 7.50E+00 9.46E+00 BALA140 0.00E+00 + 1.03E+00 1.22E+01 BI-214 4.19E+00 + 5.90E+00 1.03E+01 BI-214 5.01E+00 + 6.49E+00 9.37E+00 Location ST-27 collected 5/30/2019 Location ST-27 collected 7/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.58E+00 + 4.17E+01 5.96E+01 K-40 4.41E+01 + 4.49E+01 6.28E+01 CR-51 -5.19E+00 + 3.81E+01 5.40E+01 CR-51 -1.19E+00 + 4.01E+01 5.91E+01 MN-54 -1.31E+00 + 3.38E+00 4.50E+00 MN-54 7.29E-01 + 2.96E+00 4.14E+00 CO-58 1.24E+00 + 3.73E+00 5.00E+00 CO-58 -1.09E+00 + 4.19E+00 5.79E+00 FE-59 1.11E+00 + 1.01E+01 1.32E+01 FE-59 3.77E+00 + 9.65E+00 1.28E+01 CO-60 -1.76E+00 + 4.12E+00 5.22E+00 CO-60 1.47E-01 + 3.27E+00 4.57E+00 ZN-65 -2.91E-01 + 7.12E+00 9.50E+00 ZN-65 -2.07E-01 + 7.34E+00 1.01E+01 ZRNB-95 5.94E-01 + 5.83E+00 8.20E+00 ZRNB-95 2.35E+00 + 5.72E+00 7.91E+00 I-131 5.05E-01 + 1.07E+01 1.53E+01 I-131 -9.04E+00 + 1.75E+01 2.52E+01 CS-134 -1.98E+00 + 3.60E+00 4.87E+00 CS-134 -1.71E+00 + 3.37E+00 4.71E+00 CS-137 2.03E+00 + 3.76E+00 5.09E+00 CS-137 -3.94E-02 + 3.01E+00 4.38E+00 BALA140 7.45E+00 + 7.58E+00 9.03E+00 BALA140 1.05E+00 + 8.71E+00 1.18E+01 BI-214 1.53E+00 + 8.30E+00 1.19E+01 BI-214 2.46E+00 + 8.39E+00 1.21E+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 7/31/2019 Location ST-27 collected 8/31/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.00E+01 + 4.56E+01 6.42E+01 K-40 2.00E+01 + 4.33E+01 6.28E+01 CR-51 2.83E-01 + 3.16E+01 4.66E+01 CR-51 1.76E-01 + 4.13E+01 6.09E+01 MN-54 -8.94E-01 + 3.43E+00 4.73E+00 MN-54 9.40E-01 + 3.05E+00 4.24E+00 CO-58 1.88E+00 + 3.29E+00 4.49E+00 CO-58 -1.23E-01 + 3.53E+00 5.00E+00 FE-59 -1.82E+00 + 1.03E+01 1.38E+01 FE-59 -2.02E+00 + 1.07E+01 1.43E+01 CO-60 -9.00E-01 + 3.61E+00 5.04E+00 CO-60 1.82E+00 + 3.12E+00 4.20E+00 ZN-65 -1.08E+00 + 6.66E+00 9.10E+00 ZN-65 -5.19E-02 + 6.75E+00 9.35E+00 ZRNB-95 2.33E+00 + 6.06E+00 8.35E+00 ZRNB-95 -3.70E+00 + 7.71E+00 1.05E+01 I-131 2.49E-01 + 8.74E+00 1.29E+01 I-131 3.07E+00 + 1.66E+01 2.44E+01 CS-134 -1.96E+00 + 4.03E+00 6.73E+00 CS-134 -1.30E-01 + 3.19E+00 4.58E+00 CS-137 -1.71E+00 + 3.38E+00 4.75E+00 CS-137 1.08E+00 + 3.06E+00 4.36E+00 BALA140 6.72E+00 + 5.64E+00 1.04E+01 BALA140 2.51E+00 + 1.05E+01 1.39E+01 BI-214 + 1.16E+01 + 5.14E+00 6.59E+00 BI-214 5.95E+00 + 7.55E+00 1.07E+01 Location ST-27 collected 10/1/2019 Location ST-27 collected 11/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.67E+01 + 4.36E+01 6.47E+01 K-40 -2.34E+01 + 4.09E+01 6.01E+01 CR-51 7.44E-01 + 3.30E+01 4.88E+01 CR-51 -1.68E+01 + 3.46E+01 4.97E+01 MN-54 -8.24E-01 + 3.49E+00 4.83E+00 MN-54 -2.89E-01 + 3.04E+00 4.07E+00 CO-58 -1.15E+00 + 3.73E+00 5.15E+00 CO-58 1.94E+00 + 3.06E+00 4.13E+00 FE-59 -2.15E+00 + 1.05E+01 1.39E+01 FE-59 4.45E+00 + 9.89E+00 1.24E+01 CO-60 9.93E-01 + 3.18E+00 4.24E+00 CO-60 7.39E-01 + 2.90E+00 3.71E+00 ZN-65 3.56E-01 + 7.05E+00 9.69E+00 ZN-65 -4.16E+00 + 7.26E+00 9.26E+00 ZRNB-95 2.83E+00 + 6.35E+00 8.71E+00 ZRNB-95 -2.99E+00 + 6.45E+00 8.73E+00 I-131 1.13E+00 + 1.00E+01 1.48E+01 I-131 1.56E-01 + 8.85E+00 1.30E+01 CS-134 -4.21E-01 + 3.25E+00 4.64E+00 CS-134 -1.70E+00 + 3.02E+00 4.06E+00 CS-137 4.93E-01 + 3.00E+00 4.32E+00 CS-137 7.82E-01 + 3.25E+00 4.43E+00 BALA140 -4.04E+00 + 1.03E+01 1.32E+01 BALA140 0.00E+00 + 4.00E+00 1.05E+01 BI-214 3.92E+00 + 7.59E+00 1.12E+01 BI-214 2.98E+00 + 7.31E+00 1.04E+01 Location ST-27 collected 12/2/2019 Location ST-27 collected 1/2/2020 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.20E+00 + 4.22E+01 5.90E+01 K-40 2.46E+01 + 3.64E+01 5.16E+01 CR-51 3.97E+00 + 3.59E+01 5.08E+01 CR-51 1.53E+01 + 3.59E+01 5.03E+01 MN-54 2.22E-01 + 3.20E+00 4.34E+00 MN-54 -1.75E-01 + 3.41E+00 4.62E+00 CO-58 -1.22E+00 + 3.37E+00 4.51E+00 CO-58 -2.25E+00 + 4.16E+00 5.48E+00 FE-59 1.01E+00 + 9.20E+00 1.20E+01 FE-59 4.84E+00 + 8.64E+00 1.10E+01 CO-60 1.37E+00 + 2.19E+00 2.80E+00 CO-60 2.44E+00 + 2.74E+00 3.38E+00 ZN-65 -4.92E+00 + 8.36E+00 1.07E+01 ZN-65 -3.79E-01 + 6.15E+00 8.27E+00 ZRNB-95 2.73E+00 + 4.91E+00 6.72E+00 ZRNB-95 -4.69E+00 + 7.54E+00 1.02E+01 I-131 3.02E+00 + 9.12E+00 1.28E+01 I-131 3.67E+00 + 1.21E+01 1.71E+01 CS-134 0.00E+00 + 6.89E-01 4.25E+00 CS-134 1.54E+00 + 3.19E+00 4.34E+00 CS-137 -9.86E-01 + 3.39E+00 4.66E+00 CS-137 1.75E+00 + 3.25E+00 4.42E+00 BALA140 -1.62E+00 + 8.72E+00 1.11E+01 BALA140 -1.43E+00 + 1.18E+01 1.49E+01 BI-214 4.99E+00 + 8.27E+00 1.16E+01 BI-214 -1.11E+01 + 7.77E+00 1.18E+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 Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 1.74E+01 -2.34E+01 4.41E+01 6.08E+01 12 0 CR-51 -2.69E-01 -1.68E+01 1.53E+01 5.09E+01 12 0 MN-54 2.81E-01 -1.31E+00 4.14E+00 4.35E+00 12 0 CO-58 -1.33E-01 -2.25E+00 1.94E+00 4.74E+00 12 0 FE-59 9.73E-01 -8.29E+00 7.09E+00 1.34E+01 12 0 CO-60 7.40E-01 -1.76E+00 2.44E+00 4.08E+00 12 0 ZN-65 -8.15E-01 -4.92E+00 4.33E+00 9.60E+00 12 0 ZRNB-95 -4.15E-01 -4.69E+00 2.73E+00 8.71E+00 12 0 I-131 -5.22E-01 -9.04E+00 3.67E+00 1.61E+01 12 0 CS-134 -5.25E-01 -1.98E+00 1.54E+00 4.45E+00 12 0 CS-137 4.68E-01 -1.71E+00 2.51E+00 4.39E+00 12 0 BALA140 1.56E+00 -4.04E+00 7.45E+00 1.19E+01 12 0 BI-214 2.75E+00 -1.11E+01 1.16E+01 1.11E+01 12 1 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 3/6/2019 Location ST-31 collected 6/3/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 6.06E+01 + 8.01E+01 1.09E+02 K-40 4.10E+01 + 8.73E+01 1.19E+02 CR-51 5.74E+00 + 5.25E+01 7.44E+01 CR-51 6.57E+00 + 5.78E+01 8.17E+01 MN-54 -1.12E+00 + 7.03E+00 9.19E+00 MN-54 -5.97E-01 + 6.79E+00 9.17E+00 CO-58 0.00E+00 + 1.29E+00 8.00E+00 CO-58 7.10E-01 + 6.24E+00 8.45E+00 FE-59 -6.94E+00 + 1.69E+01 2.09E+01 FE-59 3.34E+00 + 1.76E+01 2.26E+01 CO-60 3.95E+00 + 5.91E+00 7.07E+00 CO-60 -1.53E+00 + 7.53E+00 9.67E+00 ZN-65 2.11E+00 + 1.27E+01 1.61E+01 ZN-65 -1.58E+00 + 1.54E+01 2.63E+01 ZRNB-95 5.23E+00 + 1.05E+01 1.36E+01 ZRNB-95 2.67E+00 + 1.25E+01 1.67E+01 I-131 -5.92E+00 + 7.74E+00 1.07E+01 I-131 -2.53E+00 + 8.57E+00 1.20E+01 CS-134 -2.61E+00 + 7.49E+00 9.89E+00 CS-134 -4.48E+00 + 1.10E+01 1.84E+01 CS-137 6.67E+00 + 6.18E+00 7.89E+00 CS-137 -5.42E+00 + 9.25E+00 1.25E+01 BALA140 1.23E+00 + 7.45E+00 9.09E+00 BALA140 1.99E+00 + 6.25E+00 7.99E+00 BI-214 + 1.79E+02 + 2.54E+01 2.62E+01 BI-214 + 6.25E+01 + 2.08E+01 2.52E+01 Location ST-31 collected 9/17/2019 Location ST-31 collected 12/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 7.95E+01 + 8.62E+01 1.20E+02 K-40 9.04E+01 + 8.19E+01 1.10E+02 CR-51 -1.74E+01 + 6.55E+01 9.54E+01 CR-51 -1.10E+01 + 6.83E+01 9.61E+01 MN-54 2.39E+00 + 6.22E+00 8.57E+00 MN-54 2.33E+00 + 7.15E+00 9.52E+00 CO-58 0.00E+00 + 2.63E+00 9.05E+00 CO-58 5.46E+00 + 6.50E+00 8.43E+00 FE-59 -1.29E+01 + 2.17E+01 2.78E+01 FE-59 6.82E+00 + 1.65E+01 2.11E+01 CO-60 1.68E+00 + 6.31E+00 8.66E+00 CO-60 4.45E-01 + 6.29E+00 8.24E+00 ZN-65 -1.18E+01 + 1.84E+01 2.42E+01 ZN-65 -9.88E+00 + 2.04E+01 3.40E+01 ZRNB-95 7.35E+00 + 1.12E+01 1.52E+01 ZRNB-95 1.49E+00 + 1.27E+01 1.71E+01 I-131 6.21E+00 + 1.20E+01 1.74E+01 I-131 -1.35E+00 + 1.11E+01 1.57E+01 CS-134 1.07E+00 + 6.46E+00 9.21E+00 CS-134 6.12E+00 + 1.16E+01 1.92E+01 CS-137 -4.70E+00 + 8.62E+00 1.20E+01 CS-137 -5.22E+00 + 8.89E+00 1.20E+01 BALA140 7.95E+00 + 1.01E+01 1.26E+01 BALA140 -6.98E+00 + 1.20E+01 1.47E+01 BI-214 1.59E+01 + 1.88E+01 2.65E+01 BI-214 + 1.03E+02 + 2.03E+01 2.40E+01 Location ST-32 collected 3/6/2019 Location ST-32 collected 6/3/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.41E+01 + 9.15E+01 1.21E+02 K-40 1.40E+02 + 8.99E+01 1.60E+02 CR-51 -5.35E+01 + 7.04E+01 9.70E+01 CR-51 -1.76E+01 + 6.35E+01 9.22E+01 MN-54 2.88E+00 + 6.89E+00 8.89E+00 MN-54 4.13E+00 + 6.03E+00 8.14E+00 CO-58 3.98E+00 + 6.81E+00 8.72E+00 CO-58 -9.94E-01 + 6.92E+00 9.62E+00 FE-59 -1.23E+01 + 2.17E+01 2.64E+01 FE-59 1.54E+01 + 1.32E+01 1.62E+01 CO-60 0.00E+00 + 1.40E+00 1.21E+01 CO-60 -4.72E+00 + 8.54E+00 1.15E+01 ZN-65 1.92E+00 + 1.45E+01 1.82E+01 ZN-65 -7.09E+00 + 1.97E+01 3.32E+01 ZRNB-95 1.12E+00 + 1.21E+01 1.60E+01 ZRNB-95 2.08E+00 + 1.09E+01 1.52E+01 I-131 -3.96E+00 + 1.09E+01 1.53E+01 I-131 3.56E+00 + 9.15E+00 1.33E+01 CS-134 2.88E+00 + 7.01E+00 9.25E+00 CS-134 -1.42E+00 + 1.27E+01 2.14E+01 CS-137 -2.70E+00 + 8.15E+00 1.08E+01 CS-137 3.95E-01 + 7.10E+00 1.02E+01 BALA140 8.16E+00 + 8.98E+00 1.03E+01 BALA140 7.53E+00 + 8.09E+00 9.93E+00 BI-214 + 3.95E+02 + 3.23E+01 2.63E+01 BI-214 + 1.47E+02 + 2.13E+01 2.23E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 2

Table A-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 9/17/2019 Location ST-32 collected 12/4/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.18E+01 + 8.17E+01 1.13E+02 K-40 6.47E+01 + 1.07E+02 1.44E+02 CR-51 2.64E+00 + 7.16E+01 1.01E+02 CR-51 3.75E+00 + 6.91E+01 1.01E+02 MN-54 -2.47E+00 + 8.39E+00 1.11E+01 MN-54 -1.97E+00 + 7.99E+00 1.10E+01 CO-58 -1.21E-01 + 7.52E+00 1.02E+01 CO-58 4.04E+00 + 7.31E+00 9.92E+00 FE-59 -3.10E+00 + 2.02E+01 2.60E+01 FE-59 5.21E-01 + 1.62E+01 2.20E+01 CO-60 -2.58E+00 + 8.04E+00 1.02E+01 CO-60 -5.10E-01 + 8.03E+00 1.10E+01 ZN-65 -3.85E+00 + 1.84E+01 3.11E+01 ZN-65 2.03E+00 + 2.62E+01 4.43E+01 ZRNB-95 -8.76E+00 + 1.48E+01 1.93E+01 ZRNB-95 -7.04E-01 + 1.26E+01 1.75E+01 I-131 1.10E+00 + 1.49E+01 2.12E+01 I-131 1.27E+00 + 1.09E+01 1.60E+01 CS-134 -5.51E-01 + 1.18E+01 1.98E+01 CS-134 5.17E+00 + 1.78E+01 2.96E+01 CS-137 3.24E+00 + 8.21E+00 1.12E+01 CS-137 -5.91E+00 + 1.04E+01 1.45E+01 BALA140 -6.06E+00 + 1.33E+01 1.64E+01 BALA140 6.73E-01 + 4.55E+00 8.37E+00 BI-214 + 1.07E+02 + 2.28E+01 2.50E+01 BI-214 + 4.00E+02 + 3.19E+01 2.51E+01 Location ST-52 collected 3/4/2019 Location ST-52 collected 6/3/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 7.33E+01 + 7.76E+01 1.06E+02 K-40 5.96E+01 + 8.43E+01 1.15E+02 CR-51 -1.34E+01 + 5.37E+01 7.59E+01 CR-51 7.70E+00 + 5.95E+01 8.40E+01 MN-54 3.13E-01 + 5.38E+00 7.18E+00 MN-54 1.12E-01 + 7.40E+00 1.00E+01 CO-58 5.55E+00 + 5.46E+00 6.82E+00 CO-58 -1.36E+00 + 6.36E+00 8.56E+00 FE-59 0.00E+00 + 3.78E+00 2.28E+01 FE-59 1.18E-01 + 1.55E+01 2.03E+01 CO-60 -2.43E+00 + 7.70E+00 9.35E+00 CO-60 3.98E+00 + 6.04E+00 7.58E+00 ZN-65 2.06E+00 + 1.23E+01 1.55E+01 ZN-65 -3.61E+00 + 1.63E+01 2.12E+01 ZRNB-95 0.00E+00 + 4.91E+00 1.71E+01 ZRNB-95 4.23E+00 + 1.22E+01 1.62E+01 I-131 -6.86E-01 + 8.00E+00 1.14E+01 I-131 2.02E+00 + 8.42E+00 1.19E+01 CS-134 5.20E+00 + 5.19E+00 6.66E+00 CS-134 -5.76E+00 + 9.46E+00 1.27E+01 CS-137 5.84E+00 + 5.82E+00 7.47E+00 CS-137 1.71E+00 + 7.71E+00 1.06E+01 BALA140 4.18E+00 + 9.67E+00 1.15E+01 BALA140 -5.51E-01 + 9.22E+00 1.18E+01 BI-214 + 3.63E+01 + 1.66E+01 2.23E+01 BI-214 2.53E+01 + 2.13E+01 2.88E+01 Location ST-52 collected 9/17/2019 Location ST-52 collected 12/5/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 2.55E+01 + 9.14E+01 1.30E+02 K-40 6.50E+01 + 8.67E+01 1.17E+02 CR-51 6.00E+00 + 6.17E+01 9.07E+01 CR-51 -1.59E+01 + 6.58E+01 9.25E+01 MN-54 -3.98E-01 + 6.45E+00 9.04E+00 MN-54 -3.65E+00 + 8.09E+00 1.07E+01 CO-58 -3.37E+00 + 7.57E+00 1.03E+01 CO-58 3.09E+00 + 6.08E+00 8.06E+00 FE-59 -4.03E+00 + 2.01E+01 2.65E+01 FE-59 1.59E+01 + 1.40E+01 1.68E+01 CO-60 6.64E-01 + 6.75E+00 9.30E+00 CO-60 -5.04E+00 + 8.18E+00 1.02E+01 ZN-65 4.78E-01 + 1.39E+01 1.91E+01 ZN-65 1.33E+00 + 1.37E+01 1.82E+01 ZRNB-95 -4.79E+00 + 1.39E+01 1.91E+01 ZRNB-95 -3.17E+00 + 1.26E+01 1.68E+01 I-131 -4.26E-01 + 1.29E+01 1.91E+01 I-131 -8.87E-01 + 1.00E+01 1.43E+01 CS-134 4.68E+00 + 6.71E+00 9.30E+00 CS-134 -2.20E+00 + 7.98E+00 1.09E+01 CS-137 -6.71E-01 + 7.17E+00 1.03E+01 CS-137 4.00E+00 + 7.03E+00 9.53E+00 BALA140 -9.94E+00 + 1.50E+01 1.87E+01 BALA140 -7.61E+00 + 1.19E+01 1.44E+01 BI-214 -1.87E+01 + 1.72E+01 2.60E+01 BI-214 -3.57E+00 + 1.96E+01 2.78E+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 Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 6.72E+01 2.55E+01 1.40E+02 1.22E+02 12 0 CR-51 -8.03E+00 -5.35E+01 7.70E+00 9.02E+01 12 0 MN-54 1.63E-01 -3.65E+00 4.13E+00 9.37E+00 12 0 CO-58 1.41E+00 -3.37E+00 5.55E+00 8.85E+00 12 0 FE-59 2.31E-01 -1.29E+01 1.59E+01 2.25E+01 12 0 CO-60 -5.07E-01 -5.04E+00 3.98E+00 9.57E+00 12 0 ZN-65 -2.32E+00 -1.18E+01 2.11E+00 2.51E+01 12 0 ZRNB-95 7.34E-01 -8.76E+00 7.35E+00 1.65E+01 12 0 I-131 -1.35E-01 -5.92E+00 6.21E+00 1.49E+01 12 0 CS-134 6.75E-01 -5.76E+00 6.12E+00 1.47E+01 12 0 CS-137 -2.30E-01 -5.91E+00 6.67E+00 1.07E+01 12 0 BALA140 4.71E-02 -9.94E+00 8.16E+00 1.21E+01 12 0 BI-214 1.21E+02 -1.87E+01 4.00E+02 2.55E+01 12 8 Page 1 of 1

TABLE A-15.1 GAMMA SPECTROMETRY RESULTS OF ROOT CROPS Results in pCi/kilogram (wet)

Station 37B is Indicator - Station 9C is Control Station 37B Onion collected 7/9/2019 Station 37B Potato collected 7/9/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.26E+03 + 2.25E+02 2.08E+02 K-40 + 3.81E+03 + 3.49E+02 1.32E+02 MN-54 5.42E+00 + 1.25E+01 1.66E+01 MN-54 2.10E+00 + 9.94E+00 1.38E+01 CO-58 5.14E+00 + 1.02E+01 1.36E+01 CO-58 3.50E+00 + 7.73E+00 1.07E+01 FE-59 -6.71E+00 + 3.09E+01 4.00E+01 FE-59 1.06E+01 + 2.49E+01 3.29E+01 CO-60 -5.74E+00 + 1.48E+01 1.89E+01 CO-60 3.17E+00 + 1.05E+01 1.40E+01 ZN-65 -2.44E+00 + 2.84E+01 3.75E+01 ZN-65 -1.98E+01 + 3.15E+01 4.06E+01 ZRNB-95 7.15E+00 + 1.86E+01 2.49E+01 ZRNB-95 -8.66E-01 + 1.76E+01 2.55E+01 I-131 -2.70E+00 + 1.38E+01 1.95E+01 I-131 2.04E+00 + 9.18E+00 1.34E+01 CS-134 -6.67E+00 + 1.36E+01 1.85E+01 CS-134 3.65E+00 + 9.88E+00 1.38E+01 CS-137 -8.57E+00 + 1.54E+01 2.08E+01 CS-137 -4.48E+00 + 1.09E+01 1.53E+01 BALA140 -3.26E+00 + 1.62E+01 2.05E+01 BALA140 7.41E+00 + 5.25E+00 1.48E+01 Station 37B Potato collected 8/28/2019 Station 37B Onion collected 8/28/2019 Nuclide RQ Activity MDA Nuclide RQ Activity Error MDA K-40 + 4.33E+03 + 4.02E+02 1.58E+02 K-40 + 1.15E+03 + 2.41E+02 2.06E+02 MN-54 -5.67E-01 + 9.85E+00 1.45E+01 MN-54 -6.10E+00 + 1.35E+01 1.82E+01 CO-58 3.35E+00 + 9.43E+00 1.35E+01 CO-58 1.77E+00 + 9.04E+00 1.33E+01 FE-59 5.49E+00 + 2.89E+01 4.01E+01 FE-59 9.68E+00 + 3.28E+01 4.35E+01 CO-60 6.46E-01 + 9.75E+00 1.42E+01 CO-60 -4.78E+00 + 1.58E+01 2.08E+01 ZN-65 -9.44E+00 + 2.80E+01 3.85E+01 ZN-65 5.58E+00 + 1.85E+01 2.58E+01 ZRNB-95 4.82E+00 + 1.72E+01 2.46E+01 ZRNB-95 -3.04E+00 + 1.56E+01 2.28E+01 I-131 2.29E-01 + 8.83E+00 1.35E+01 I-131 -6.26E-01 + 9.56E+00 1.45E+01 CS-134 -5.48E-01 + 9.79E+00 1.46E+01 CS-134 -3.34E+00 + 9.10E+00 1.29E+01 CS-137 -7.43E+00 + 1.32E+01 1.87E+01 CS-137 -4.73E+00 + 1.24E+01 1.74E+01 BALA140 -1.21E+01 + 1.90E+01 2.41E+01 BALA140 7.31E+00 + 9.76E+00 1.23E+01 Station 37B Potato collected 9/18/2019 Station 37B Onion collected 9/18/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 3.63E+03 + 3.25E+02 1.33E+02 K-40 + 1.61E+03 + 2.15E+02 1.22E+02 MN-54 4.81E+00 + 6.64E+00 9.08E+00 MN-54 -1.33E+00 + 7.32E+00 1.07E+01 CO-58 2.69E+00 + 8.05E+00 1.15E+01 CO-58 4.09E+00 + 6.18E+00 8.57E+00 FE-59 1.24E+01 + 2.89E+01 3.85E+01 FE-59 2.76E+00 + 1.88E+01 2.69E+01 CO-60 3.94E+00 + 9.06E+00 1.23E+01 CO-60 -4.62E+00 + 1.11E+01 1.48E+01 ZN-65 8.80E+00 + 2.18E+01 2.98E+01 ZN-65 6.31E+00 + 1.81E+01 2.52E+01 ZRNB-95 5.44E+00 + 1.23E+01 1.75E+01 ZRNB-95 8.67E+00 + 8.58E+00 1.11E+01 I-131 -4.58E-01 + 1.09E+01 1.66E+01 I-131 -1.94E+00 + 1.03E+01 1.56E+01 CS-134 2.94E+00 + 7.20E+00 1.04E+01 CS-134 2.83E+00 + 6.69E+00 9.70E+00 CS-137 -3.61E+00 + 9.05E+00 1.31E+01 CS-137 3.05E+00 + 8.32E+00 1.21E+01 BALA140 3.41E+00 + 8.21E+00 1.16E+01 BALA140 -2.03E-01 + 1.05E+01 1.54E+01 Station 37B Onion collected 10/3/2019 Station 37B Potato collected 10/3/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 9.42E+02 + 1.36E+02 7.83E+01 K-40 + 3.46E+03 + 2.78E+02 9.01E+01 MN-54 -3.06E-01 + 6.32E+00 8.89E+00 MN-54 2.93E+00 + 6.71E+00 9.16E+00 CO-58 1.19E+00 + 5.13E+00 7.24E+00 CO-58 3.56E-01 + 7.36E+00 1.04E+01 FE-59 3.89E+00 + 1.13E+01 1.56E+01 FE-59 -8.87E+00 + 2.90E+01 3.74E+01 CO-60 5.88E+00 + 5.35E+00 6.72E+00 CO-60 1.63E+00 + 8.73E+00 1.17E+01 ZN-65 -2.96E-01 + 1.25E+01 1.76E+01 ZN-65 2.53E+00 + 1.86E+01 2.52E+01 ZRNB-95 4.27E+00 + 7.30E+00 1.02E+01 ZRNB-95 6.19E-01 + 1.20E+01 1.75E+01 I-131 1.58E+00 + 5.57E+00 8.23E+00 I-131 1.37E+00 + 9.07E+00 1.32E+01 CS-134 -2.48E+00 + 6.24E+00 8.67E+00 CS-134 -4.36E+00 + 7.63E+00 1.04E+01 CS-137 -6.07E-01 + 6.64E+00 9.54E+00 CS-137 -5.50E+00 + 1.00E+01 1.37E+01 BALA140 0.00E+00 + 1.31E+00 4.83E+00 BALA140 2.39E+00 + 6.35E+00 8.83E+00 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 2

TABLE A-15.1 GAMMA SPECTROMETRY RESULTS OF ROOT CROPS Results in pCi/kilogram (wet)

Station 37B is Indicator - Station 9C is Control Station 9C Onion collected 7/12/2019 Station 9C Potato collected 8/16/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.12E+03 + 1.91E+02 1.76E+02 K-40 + 4.54E+03 + 3.67E+02 1.07E+02 MN-54 3.57E+00 + 1.16E+01 1.56E+01 MN-54 3.45E+00 + 8.95E+00 1.23E+01 CO-58 5.80E+00 + 1.12E+01 1.49E+01 CO-58 8.37E+00 + 8.48E+00 1.09E+01 FE-59 2.42E+01 + 2.60E+01 3.19E+01 FE-59 -1.55E+01 + 3.97E+01 5.08E+01 CO-60 1.20E+00 + 1.22E+01 1.60E+01 CO-60 2.96E+00 + 9.78E+00 1.31E+01 ZN-65 -7.99E+00 + 2.79E+01 3.65E+01 ZN-65 -1.35E+01 + 3.11E+01 4.06E+01 ZRNB-95 -3.72E+00 + 2.50E+01 3.36E+01 ZRNB-95 3.26E+00 + 1.53E+01 2.20E+01 I-131 -1.20E+00 + 1.84E+01 2.62E+01 I-131 -6.37E+00 + 1.19E+01 1.67E+01 CS-134 -7.81E+00 + 1.68E+01 2.80E+01 CS-134 7.57E-01 + 9.01E+00 1.29E+01 CS-137 -2.62E+00 + 1.42E+01 1.96E+01 CS-137 -6.97E+00 + 1.30E+01 1.78E+01 BALA140 -3.87E+00 + 1.92E+01 2.44E+01 BALA140 -1.45E+00 + 1.01E+01 1.41E+01 Station 9C Potato collected 9/13/2019 Nuclide RQ Activity Error MDA K-40 + 3.87E+03 + 3.99E+02 1.59E+02 MN-54 4.11E+00 + 1.22E+01 1.69E+01 CO-58 -3.28E+00 + 1.36E+01 1.94E+01 FE-59 -1.29E+01 + 4.70E+01 6.15E+01 CO-60 3.81E+00 + 1.21E+01 1.64E+01 ZN-65 1.60E+01 + 2.64E+01 3.47E+01 ZRNB-95 -9.09E+00 + 2.49E+01 3.49E+01 I-131 -3.05E+00 + 1.64E+01 2.46E+01 CS-134 -1.53E+00 + 1.13E+01 1.62E+01 CS-137 -7.53E+00 + 1.43E+01 1.97E+01 BALA140 4.93E+00 + 1.67E+01 2.25E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 2 of 2

TABLE A - 15.2 GAMMA SPECTROMETRY RESULTS OF ROOT CROPS -

SUMMARY

Results in pCi/kilogram (wet)

Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 Ind 2.52E+03 9.42E+02 4.33E+03 1.41E+02 8 8 K-40 Cntl 3.17E+03 1.12E+03 4.54E+03 1.48E+02 3 3 MN-54 Ind 8.69E-01 -6.10E+00 5.42E+00 1.26E+01 8 0 MN-54 Cntl 3.71E+00 3.45E+00 4.11E+00 1.49E+01 3 0 CO-58 Ind 2.76E+00 3.56E-01 5.14E+00 1.11E+01 8 0 CO-58 Cntl 3.63E+00 -3.28E+00 8.37E+00 1.50E+01 3 0 FE-59 Ind 3.66E+00 -8.87E+00 1.24E+01 3.44E+01 8 0 FE-59 Cntl -1.41E+00 -1.55E+01 2.42E+01 4.81E+01 3 0 CO-60 Ind 1.48E-02 -5.74E+00 5.88E+00 1.42E+01 8 0 CO-60 Cntl 2.66E+00 1.20E+00 3.81E+00 1.52E+01 3 0 ZN-65 Ind -1.10E+00 -1.98E+01 8.80E+00 3.00E+01 8 0 ZN-65 Cntl -1.84E+00 -1.35E+01 1.60E+01 3.72E+01 3 0 ZRNB-95 Ind 3.38E+00 -3.04E+00 8.67E+00 1.93E+01 8 0 ZRNB-95 Cntl -3.18E+00 -9.09E+00 3.26E+00 3.02E+01 3 0 I-131 Ind -6.39E-02 -2.70E+00 2.04E+00 1.43E+01 8 0 I-131 Cntl -3.54E+00 -6.37E+00 -1.20E+00 2.25E+01 3 0 CS-134 Ind -9.97E-01 -6.67E+00 3.65E+00 1.24E+01 8 0 CS-134 Cntl -2.86E+00 -7.81E+00 7.57E-01 1.90E+01 3 0 CS-137 Ind -3.98E+00 -8.57E+00 3.05E+00 1.51E+01 8 0 CS-137 Cntl -5.71E+00 -7.53E+00 -2.62E+00 1.90E+01 3 0 BALA140 Ind 6.24E-01 -1.21E+01 7.41E+00 1.41E+01 8 0 BALA140 Cntl -1.32E-01 -3.87E+00 4.93E+00 2.03E+01 3 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 Apricots collected 6/24/2019 Station 37 Apricots collected 7/5/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 -9.71E+01 + 5.55E+02 9.27E+02 K-40 + 2.44E+03 + 2.48E+02 1.72E+02 MN-54 4.85E+00 + 1.60E+01 2.13E+01 MN-54 -1.32E+00 + 1.05E+01 1.47E+01 CO-58 -1.86E+00 + 1.52E+01 2.07E+01 CO-58 -5.43E+00 + 1.17E+01 1.59E+01 FE-59 -3.54E+01 + 5.96E+01 7.41E+01 FE-59 5.15E+00 + 2.61E+01 3.49E+01 CO-60 1.20E+01 + 1.52E+01 1.88E+01 CO-60 -3.42E+00 + 1.15E+01 1.60E+01 ZN-65 -7.80E+00 + 3.75E+01 4.90E+01 ZN-65 6.37E-01 + 2.38E+01 3.26E+01 ZRNB-95 -1.48E+01 + 3.25E+01 4.30E+01 ZRNB-95 -1.77E+00 + 1.74E+01 2.44E+01 I-131 -3.29E+00 + 3.26E+01 4.62E+01 I-131 -5.65E+00 + 1.58E+01 2.30E+01 CS-134 -6.51E+00 + 1.93E+01 3.24E+01 CS-134 1.01E+00 + 1.23E+01 2.10E+01 CS-137 5.71E+00 + 1.62E+01 2.22E+01 CS-137 1.69E+00 + 1.13E+01 1.62E+01 BALA140 -3.82E+00 + 2.48E+01 3.19E+01 BALA140 -6.75E+00 + 1.79E+01 2.30E+01 Station 37 Peaches collected 7/18/2019 Station 37 Apples collected 8/27/2019 Nuclide RQ Activity MDA Nuclide RQ Activity Error MDA K-40 + 1.62E+03 + 2.29E+02 2.03E+02 K-40 + 1.29E+03 + 2.27E+02 2.17E+02 MN-54 -4.77E+00 + 1.17E+01 1.61E+01 MN-54 -1.98E+00 + 1.22E+01 1.71E+01 CO-58 -4.19E+00 + 1.19E+01 1.64E+01 CO-58 -8.44E+00 + 1.42E+01 1.93E+01 FE-59 3.79E+00 + 3.40E+01 4.54E+01 FE-59 3.64E+00 + 2.41E+01 3.33E+01 CO-60 -4.61E+00 + 1.24E+01 1.73E+01 CO-60 -1.17E+00 + 1.04E+01 1.51E+01 ZN-65 -1.58E+01 + 3.20E+01 4.23E+01 ZN-65 -1.92E-01 + 2.50E+01 3.46E+01 ZRNB-95 9.95E+00 + 1.88E+01 2.57E+01 ZRNB-95 -1.17E+01 + 2.30E+01 3.14E+01 I-131 -3.56E-01 + 1.80E+01 2.66E+01 I-131 9.17E-01 + 2.02E+01 3.01E+01 CS-134 -7.61E+00 + 1.33E+01 1.86E+01 CS-134 -5.74E-01 + 1.09E+01 1.58E+01 CS-137 7.90E+00 + 1.23E+01 1.72E+01 CS-137 2.96E+00 + 1.27E+01 1.82E+01 BALA140 -7.86E+00 + 2.08E+01 2.68E+01 BALA140 5.26E+00 + 1.78E+01 2.36E+01 Station 37 Watermelon collected 9/13/2019 Station 37 White wine grapes collected 9/17/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 8.74E+02 + 1.54E+02 1.10E+02 K-40 + 2.81E+03 + 2.94E+02 1.20E+02 MN-54 -3.99E-01 + 6.48E+00 9.59E+00 MN-54 -8.60E-01 + 9.40E+00 1.32E+01 CO-58 -1.22E+00 + 6.25E+00 9.16E+00 CO-58 0.00E+00 + 3.17E+00 1.21E+01 FE-59 5.48E-01 + 2.98E+00 1.01E+01 FE-59 3.12E+00 + 2.59E+01 3.51E+01 CO-60 -2.81E+00 + 9.03E+00 1.23E+01 CO-60 -2.45E+00 + 1.24E+01 1.66E+01 ZN-65 6.85E+00 + 1.37E+01 1.90E+01 ZN-65 -1.48E+01 + 3.20E+01 4.17E+01 ZRNB-95 -7.06E-01 + 1.15E+01 1.70E+01 ZRNB-95 4.08E+00 + 1.27E+01 1.83E+01 I-131 8.87E-01 + 7.80E+00 1.20E+01 I-131 -2.67E-01 + 8.51E+00 1.29E+01 CS-134 2.04E+00 + 5.07E+00 7.44E+00 CS-134 -4.62E+00 + 1.26E+01 2.13E+01 CS-137 -1.33E+00 + 8.16E+00 1.20E+01 CS-137 -1.88E+00 + 1.09E+01 1.55E+01 BALA140 3.04E+00 + 7.32E+00 1.03E+01 BALA140 4.52E+00 + 7.77E+00 1.02E+01 Station 37 Red wine grapes collected 10/1/2019 Station 9C Cherries collected 7/12/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 2.45E+03 + 2.30E+02 1.00E+02 K-40 + 3.27E+03 + 3.61E+02 2.57E+02 MN-54 -3.06E+00 + 8.89E+00 1.20E+01 MN-54 1.07E+00 + 1.60E+01 2.25E+01 CO-58 1.24E+00 + 7.89E+00 1.09E+01 CO-58 8.46E+00 + 1.44E+01 1.97E+01 FE-59 -1.60E+00 + 2.52E+01 3.35E+01 FE-59 -3.86E+01 + 6.04E+01 7.72E+01 CO-60 4.56E-01 + 7.49E+00 1.02E+01 CO-60 -8.19E+00 + 1.82E+01 2.52E+01 ZN-65 -7.26E+00 + 2.21E+01 2.90E+01 ZN-65 -2.76E+01 + 4.52E+01 5.94E+01 ZRNB-95 -3.01E+00 + 1.19E+01 1.70E+01 ZRNB-95 1.04E+01 + 3.08E+01 4.24E+01 I-131 -8.90E-01 + 1.01E+01 1.48E+01 I-131 -3.82E+00 + 2.29E+01 3.37E+01 CS-134 1.61E+00 + 4.82E+00 6.87E+00 CS-134 5.61E+00 + 1.92E+01 3.24E+01 CS-137 -1.32E+00 + 7.44E+00 1.06E+01 CS-137 -8.88E+00 + 1.90E+01 2.68E+01 BALA140 -4.74E+00 + 1.41E+01 1.82E+01 BALA140 -8.15E+00 + 2.76E+01 3.57E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 2

TABLE A-16.1 GAMMA SPECTROMETRY RESULTS OF FRUITS Results in pCi/kilogram (wet)

Station 37 is Indicator - Station 9C is Control Station 9C Peaches collected 8/16/2019 Station 9C Apples collected 9/13/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.68E+03 + 2.32E+02 2.01E+02 K-40 + 9.34E+02 + 2.12E+02 1.86E+02 MN-54 1.89E+00 + 9.68E+00 1.36E+01 MN-54 -3.65E+00 + 1.15E+01 1.64E+01 CO-58 2.29E+00 + 1.01E+01 1.41E+01 CO-58 2.49E+00 + 8.85E+00 1.29E+01 FE-59 -1.44E+01 + 3.82E+01 4.98E+01 FE-59 -6.28E+00 + 3.31E+01 4.59E+01 CO-60 2.31E+00 + 1.10E+01 1.53E+01 CO-60 5.32E+00 + 9.39E+00 1.27E+01 ZN-65 -1.56E+01 + 3.07E+01 4.06E+01 ZN-65 3.88E+00 + 2.61E+01 3.70E+01 ZRNB-95 -1.39E+01 + 2.40E+01 3.25E+01 ZRNB-95 1.08E+00 + 1.75E+01 2.60E+01 I-131 -7.91E+00 + 1.52E+01 2.19E+01 I-131 5.48E+00 + 1.10E+01 1.64E+01 CS-134 -2.09E+00 + 1.20E+01 1.71E+01 CS-134 -2.14E+00 + 1.02E+01 1.50E+01 CS-137 7.15E+00 + 1.36E+01 1.90E+01 CS-137 6.58E+00 + 9.93E+00 1.41E+01 BALA140 -6.22E+00 + 1.68E+01 2.17E+01 BALA140 -2.47E+00 + 1.77E+01 2.47E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 2 of 2

TABLE A - 16.2 GAMMA SPECTROMETRY RESULTS OF FRUITS -

SUMMARY

Results in pCi/kilogram (wet)

Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 Ind 1.63E+03 -9.71E+01 2.81E+03 2.64E+02 7 6 K-40 Cntl 1.96E+03 9.34E+02 3.27E+03 2.15E+02 3 3 MN-54 Ind -1.08E+00 -4.77E+00 4.85E+00 1.49E+01 7 0 MN-54 Cntl -2.30E-01 -3.65E+00 1.89E+00 1.75E+01 3 0 CO-58 Ind -2.84E+00 -8.44E+00 1.24E+00 1.49E+01 7 0 CO-58 Cntl 4.41E+00 2.29E+00 8.46E+00 1.56E+01 3 0 FE-59 Ind -2.96E+00 -3.54E+01 5.15E+00 3.81E+01 7 0 FE-59 Cntl -1.97E+01 -3.86E+01 -6.28E+00 5.76E+01 3 0 CO-60 Ind -2.86E-01 -4.61E+00 1.20E+01 1.52E+01 7 0 CO-60 Cntl -1.86E-01 -8.19E+00 5.32E+00 1.77E+01 3 0 ZN-65 Ind -5.48E+00 -1.58E+01 6.85E+00 3.55E+01 7 0 ZN-65 Cntl -1.31E+01 -2.76E+01 3.88E+00 4.57E+01 3 0 ZRNB-95 Ind -2.56E+00 -1.48E+01 9.95E+00 2.53E+01 7 0 ZRNB-95 Cntl -7.85E-01 -1.39E+01 1.04E+01 3.36E+01 3 0 I-131 Ind -1.24E+00 -5.65E+00 9.17E-01 2.37E+01 7 0 I-131 Cntl -2.08E+00 -7.91E+00 5.48E+00 2.40E+01 3 0 CS-134 Ind -2.09E+00 -7.61E+00 2.04E+00 1.76E+01 7 0 CS-134 Cntl 4.60E-01 -2.14E+00 5.61E+00 2.15E+01 3 0 CS-137 Ind 1.96E+00 -1.88E+00 7.90E+00 1.60E+01 7 0 CS-137 Cntl 1.61E+00 -8.88E+00 7.15E+00 2.00E+01 3 0 BALA140 Ind -1.48E+00 -7.86E+00 5.26E+00 2.06E+01 7 0 BALA140 Cntl -5.61E+00 -8.15E+00 -2.47E+00 2.74E+01 3 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 37, 48G and 104 are Indicators - Station 9C is Control Station 37 Broad Leaf Vegetable collected 6/7/2019 Station 37 Tomatoes collected 7/12/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 5.57E+03 + 5.29E+02 2.29E+02 K-40 + 2.00E+03 + 2.20E+02 1.48E+02 MN-54 6.07E+00 + 1.12E+01 1.58E+01 MN-54 -9.30E+00 + 1.51E+01 1.97E+01 CO-58 -2.33E+00 + 1.45E+01 2.09E+01 CO-58 -2.79E+00 + 1.38E+01 1.85E+01 FE-59 5.23E-01 + 4.78E+01 6.66E+01 FE-59 2.31E+01 + 2.48E+01 3.05E+01 CO-60 -1.13E+01 + 2.32E+01 3.05E+01 CO-60 4.07E+00 + 1.21E+01 1.55E+01 ZN-65 -8.94E+00 + 3.72E+01 5.16E+01 ZN-65 -1.58E+01 + 3.11E+01 4.00E+01 ZRNB-95 -2.69E+00 + 2.75E+01 3.97E+01 ZRNB-95 -1.79E+00 + 2.25E+01 3.04E+01 I-131 6.24E+00 + 1.44E+01 2.15E+01 I-131 1.25E+01 + 1.43E+01 1.97E+01 CS-134 3.76E+00 + 9.00E+00 1.32E+01 CS-134 -8.14E+00 + 1.68E+01 2.80E+01 CS-137 1.64E+00 + 1.33E+01 1.99E+01 CS-137 -9.19E+00 + 1.56E+01 2.11E+01 BALA140 6.89E-01 + 1.28E+01 1.99E+01 BALA140 1.11E+01 + 1.11E+01 2.05E+01 Station 37 Cabbage collected 7/12/2019 Station 104 Broad Leaf Vegetable collected 7/18/2019 Nuclide RQ Activity MDA Nuclide RQ Activity Error MDA K-40 + 2.68E+03 + 3.86E+02 2.14E+02 K-40 + 3.62E+03 + 3.24E+02 1.30E+02 MN-54 -4.83E+00 + 1.64E+01 2.27E+01 MN-54 -9.72E-01 + 9.61E+00 1.34E+01 CO-58 -7.87E+00 + 1.99E+01 2.78E+01 CO-58 -2.35E+00 + 9.95E+00 1.37E+01 FE-59 -2.93E+00 + 4.82E+01 6.60E+01 FE-59 -2.07E+00 + 3.26E+01 4.32E+01 CO-60 -3.42E+00 + 1.60E+01 2.20E+01 CO-60 2.43E-01 + 1.09E+01 1.48E+01 ZN-65 -2.33E+01 + 4.83E+01 6.34E+01 ZN-65 -1.15E+01 + 3.12E+01 4.07E+01 ZRNB-95 1.21E+01 + 2.23E+01 3.14E+01 ZRNB-95 -4.71E+00 + 1.77E+01 2.50E+01 I-131 -1.72E+00 + 1.46E+01 2.25E+01 I-131 3.64E-01 + 9.73E+00 1.45E+01 CS-134 -5.47E+00 + 1.66E+01 2.32E+01 CS-134 -3.93E+00 + 9.80E+00 1.35E+01 CS-137 -1.14E+01 + 2.13E+01 2.92E+01 CS-137 -5.26E+00 + 1.14E+01 1.58E+01 BALA140 2.21E+00 + 1.48E+01 2.17E+01 BALA140 -2.46E+00 + 1.07E+01 1.47E+01 Station 37 Broad Leaf Vegetable collected 7/18/2019 Station 37 Broad Leaf Vegetable collected 8/16/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 6.75E+03 + 3.45E+02 1.86E+02 K-40 + 6.29E+03 + 7.21E+02 3.76E+02 MN-54 4.06E-01 + 1.25E+01 1.66E+01 MN-54 3.71E+00 + 2.04E+01 2.98E+01 CO-58 -5.91E+00 + 1.46E+01 1.90E+01 CO-58 3.74E+00 + 2.32E+01 3.35E+01 FE-59 -1.08E+01 + 4.16E+01 5.18E+01 FE-59 2.48E+00 + 7.02E+01 9.83E+01 CO-60 -5.14E+00 + 1.40E+01 1.74E+01 CO-60 0.00E+00 + 1.21E+01 3.84E+01 ZN-65 -1.39E+01 + 3.11E+01 3.94E+01 ZN-65 -1.15E+01 + 6.03E+01 8.40E+01 ZRNB-95 -1.68E+01 + 2.82E+01 3.66E+01 ZRNB-95 -4.31E+00 + 4.40E+01 6.35E+01 I-131 4.42E+00 + 3.15E+01 4.39E+01 I-131 9.32E+00 + 1.87E+01 2.79E+01 CS-134 4.67E-01 + 1.49E+01 2.50E+01 CS-134 9.92E-01 + 2.20E+01 3.27E+01 CS-137 -7.12E+00 + 1.33E+01 1.78E+01 CS-137 2.44E+00 + 2.27E+01 3.40E+01 BALA140 -7.81E+00 + 2.58E+01 3.15E+01 BALA140 1.50E+01 + 1.22E+01 1.84E+01 Station 37 Bell Peppers collected 8/31/2019 Station 37 Tomatoes collected 8/31/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 2.30E+03 + 3.27E+02 3.09E+02 K-40 + 2.82E+03 + 2.84E+02 1.22E+02 MN-54 9.15E+00 + 1.87E+01 2.45E+01 MN-54 -3.10E+00 + 9.27E+00 1.31E+01 CO-58 -8.32E+00 + 2.15E+01 2.83E+01 CO-58 -6.70E+00 + 1.16E+01 1.59E+01 FE-59 1.82E+01 + 4.69E+01 5.93E+01 FE-59 2.44E+00 + 2.61E+01 3.63E+01 CO-60 -4.14E+00 + 1.99E+01 2.54E+01 CO-60 2.12E+00 + 8.93E+00 1.24E+01 ZN-65 -1.79E+01 + 4.47E+01 5.75E+01 ZN-65 -1.22E+01 + 2.85E+01 3.82E+01 ZRNB-95 -1.79E+01 + 3.82E+01 5.01E+01 ZRNB-95 -7.08E+00 + 1.73E+01 2.41E+01 I-131 -6.69E+00 + 2.85E+01 3.99E+01 I-131 1.73E+00 + 1.01E+01 1.53E+01 CS-134 -5.99E+00 + 2.65E+01 4.43E+01 CS-134 -4.37E+00 + 1.22E+01 2.07E+01 CS-137 -1.16E+01 + 2.29E+01 3.09E+01 CS-137 4.97E+00 + 1.11E+01 1.58E+01 BALA140 1.07E+00 + 2.74E+01 3.47E+01 BALA140 -1.81E+00 + 1.30E+01 1.81E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 2

TABLE A-17.1 GAMMA SPECTROMETRY RESULTS OF VEGETABLES Results in pCi/kilogram (wet)

Stations 37, 48G and 104 are Indicators - Station 9C is Control Station 37 Cucumber collected 8/31/2019 Station 37 Broad Leaf Vegetable collected 9/13/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 2.20E+03 + 2.65E+02 1.52E+02 K-40 + 6.65E+03 + 6.20E+02 2.59E+02 MN-54 4.63E-02 + 1.04E+00 3.42E+00 MN-54 -4.79E+00 + 2.04E+01 2.80E+01 CO-58 -1.42E+00 + 6.68E+00 9.85E+00 CO-58 -1.46E+01 + 2.47E+01 3.27E+01 FE-59 -1.31E+01 + 3.25E+01 4.31E+01 FE-59 1.25E+01 + 6.26E+01 8.25E+01 CO-60 -3.92E+00 + 1.06E+01 1.43E+01 CO-60 -2.08E+01 + 3.24E+01 4.06E+01 ZN-65 -1.60E+01 + 3.45E+01 4.59E+01 ZN-65 -1.72E+00 + 5.14E+01 6.97E+01 ZRNB-95 -2.47E+00 + 1.76E+01 2.52E+01 ZRNB-95 -3.16E+00 + 2.76E+01 4.03E+01 I-131 -5.96E+00 + 1.20E+01 1.76E+01 I-131 -4.97E+00 + 2.27E+01 3.30E+01 CS-134 6.68E-01 + 1.17E+01 2.02E+01 CS-134 -5.75E+00 + 1.80E+01 2.51E+01 CS-137 -4.83E+00 + 9.73E+00 1.39E+01 CS-137 8.80E-01 + 1.73E+01 2.52E+01 BALA140 4.61E+00 + 8.82E+00 1.21E+01 BALA140 -1.95E+01 + 3.18E+01 3.99E+01 Station 48G Broad Leaf Vegetable collected 10/1/2019 Station 9C Broad Leaf Vegetable collected 7/12/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 5.97E+03 + 4.80E+02 3.32E+02 K-40 + 1.17E+04 + 8.38E+02 4.16E+02 MN-54 1.10E+01 + 2.20E+01 2.89E+01 MN-54 -3.30E+00 + 2.63E+01 3.68E+01 CO-58 -3.36E+00 + 2.29E+01 3.04E+01 CO-58 -1.77E+01 + 3.30E+01 4.48E+01 FE-59 7.48E+00 + 5.19E+01 6.62E+01 FE-59 2.21E+00 + 8.11E+01 1.08E+02 CO-60 1.26E+01 + 1.89E+01 2.35E+01 CO-60 -2.24E+01 + 3.72E+01 4.93E+01 ZN-65 -3.00E+01 + 5.32E+01 6.76E+01 ZN-65 -1.87E+01 + 6.84E+01 9.17E+01 ZRNB-95 1.66E+01 + 3.49E+01 4.59E+01 ZRNB-95 1.90E+01 + 4.23E+01 5.81E+01 I-131 -1.18E+00 + 2.19E+01 3.08E+01 I-131 6.15E+00 + 3.17E+01 4.68E+01 CS-134 -1.58E+01 + 2.59E+01 3.47E+01 CS-134 4.00E+00 + 2.71E+01 3.86E+01 CS-137 -1.65E+01 + 2.79E+01 3.75E+01 CS-137 1.36E+01 + 2.71E+01 3.82E+01 BALA140 -2.19E+01 + 3.19E+01 3.84E+01 BALA140 7.12E+00 + 2.99E+01 4.00E+01 Station 9C Broad Leaf Vegetable collected 9/13/2019 Station 9C Bell Peppers collected 9/28/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 4.90E+03 + 5.25E+02 2.63E+02 K-40 + 1.94E+03 + 2.55E+02 2.15E+02 MN-54 -1.02E+01 + 2.22E+01 2.97E+01 MN-54 -7.91E-01 + 1.16E+01 1.64E+01 CO-58 5.92E+00 + 1.46E+01 2.01E+01 CO-58 -5.23E+00 + 1.35E+01 1.86E+01 FE-59 -1.60E+01 + 5.27E+01 6.95E+01 FE-59 -2.95E+01 + 4.61E+01 5.89E+01 CO-60 -1.21E+01 + 2.66E+01 3.41E+01 CO-60 2.33E-01 + 1.13E+01 1.60E+01 ZN-65 8.63E+00 + 3.84E+01 5.23E+01 ZN-65 -1.15E+01 + 3.18E+01 5.38E+01 ZRNB-95 -1.66E+01 + 3.35E+01 4.64E+01 ZRNB-95 1.61E+01 + 1.98E+01 2.65E+01 I-131 5.31E-01 + 2.15E+01 3.17E+01 I-131 -3.85E+00 + 1.60E+01 2.35E+01 CS-134 -4.81E+00 + 1.61E+01 2.26E+01 CS-134 -7.88E+00 + 1.90E+01 3.18E+01 CS-137 9.99E+00 + 1.75E+01 2.41E+01 CS-137 -6.36E+00 + 1.44E+01 2.03E+01 BALA140 -7.70E+00 + 2.92E+01 3.83E+01 BALA140 -1.65E-01 + 1.59E+01 2.15E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 2 of 2

TABLE A - 17.2 GAMMA SPECTROMETRY RESULTS OF VEGETABLES -

SUMMARY

Results in pCi/kilogram (wet)

Nuclide Average Activity Activity Average Number of Number of K-40 Ind 4.26E+03 2.00E+03 6.75E+03 2.23E+02 11 11 K-40 Cntl 6.19E+03 1.94E+03 1.17E+04 2.98E+02 3 3 MN-54 Ind 6.73E-01 -9.30E+00 1.10E+01 1.96E+01 11 0 MN-54 Cntl -4.76E+00 -1.02E+01 -7.91E-01 2.76E+01 3 0 CO-58 Ind -4.72E+00 -1.46E+01 3.74E+00 2.28E+01 11 0 CO-58 Cntl -5.67E+00 -1.77E+01 5.92E+00 2.78E+01 3 0 FE-59 Ind 3.45E+00 -1.31E+01 2.31E+01 5.85E+01 11 0 FE-59 Cntl -1.44E+01 -2.95E+01 2.21E+00 7.89E+01 3 0 CO-60 Ind -2.70E+00 -2.08E+01 1.26E+01 2.32E+01 11 0 CO-60 Cntl -1.14E+01 -2.24E+01 2.33E-01 3.31E+01 3 0 ZN-65 Ind -1.48E+01 -3.00E+01 -1.72E+00 5.44E+01 11 0 ZN-65 Cntl -7.20E+00 -1.87E+01 8.63E+00 6.59E+01 3 0 ZRNB-95 Ind -2.93E+00 -1.79E+01 1.66E+01 3.75E+01 11 0 ZRNB-95 Cntl 6.16E+00 -1.66E+01 1.90E+01 4.37E+01 3 0 I-131 Ind 1.28E+00 -6.69E+00 1.25E+01 2.61E+01 11 0 I-131 Cntl 9.44E-01 -3.85E+00 6.15E+00 3.40E+01 3 0 CS-134 Ind -3.96E+00 -1.58E+01 3.76E+00 2.55E+01 11 0 CS-134 Cntl -2.90E+00 -7.88E+00 4.00E+00 3.10E+01 3 0 CS-137 Ind -5.09E+00 -1.65E+01 4.97E+00 2.37E+01 11 0 CS-137 Cntl 5.73E+00 -6.36E+00 1.36E+01 2.75E+01 3 0 BALA140 Ind -1.71E+00 -2.19E+01 1.50E+01 2.45E+01 11 0 BALA140 Cntl -2.47E-01 -7.70E+00 7.12E+00 3.33E+01 3 0 Ind = Indicator Stations Cntl = Control Stations Page 1 of 1

TABLE B-1.1 2019 QUARTERLY SPECIAL INTEREST TLD RESULTS Results in milli-Roentgen (mR) per Standard Quarter Quarterly Station ID 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Sum 58 18.7 19.7 19.2 21.9 79.5 88 25.8 22.4 25.9 27.2 101.4 89 26.4 23.4 27.0 27.5 104.3 119B 21.3 20.4 21.2 23.8 86.7 119Ctrl 21.2 21.1 22.5 23.8 88.6 121 74.9 50.2 74.6 77.8 277.5 122 34.0 33.6 35.4 35.8 138.8 123 (ISFSI) 81.2 80.4 79.7 87.4 328.8 124 (ISFSI) 97.0 96.6 96.1 100.5 390.2 125 (ISFSI) 73.8 71.5 74.6 72.7 292.6 126 (ISFSI) 114.2 107.0 113.1 108.8 443.0 127 (ISFSI) 86.7 84.7 89.1 85.3 345.8 128 (ISFSI) 141.9 133.6 135.5 131.9 542.9 129 (ISFSI) 103.8 98.4 105.7 100.3 408.3 130 (ISFSI) 149.2 143.8 139.2 142.0 574.3 131 (ISFSI) 64.8 59.0 64.3 63.8 251.9 136B(ISFSI) 201.1 184.9 186.4 180.0 752.4 137B (ISFSI) 191.7 181.3 184.4 172.2 729.6 138B (ISFSI) 100.0 93.6 98.9 94.2 386.7 150 (Site 1) 19.5 19.1 19.1 20.0 77.7 151 (Site 4) 17.3 18.2 19.5 19.5 74.6 155 24.8 25.0 26.1 26.5 102.4 156 26.6 28.4 28.7 29.4 113.1 TABLE B-1.2 2019 QUARTERLY SPECIAL INTEREST TLD RESULTS-

SUMMARY

Results in milli-Roentgen (mR) per Standard Quarter Average Activity Activity Number of Location Activity Low High Samples ISFSI Quarterly Ind 113.5 59.0 201.1 48 SITE 1 & 4 Quarterly Ind 19.0 17.3 20.0 8 Quarterly Control TLDs 19.2 18.6 19.7 4 Stations 58, 88, and 89 were established in 2009 to monitor exposure from remediation work at the DOE 618-11 burial site.

Station 121 results high due to location being near the turbine building. Staion 122 results influenced by ISFSI.

Quarterly Control TLD location is ST-9. See Table A-1.1.

Stations 130 and 131 were added to the ISFSI fence in the 1st quarter 2017.

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-101B collected 1/31/2019 Location ST-101B collected 3/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 0.00E+00 + 2.57E+01 7.92E+01 K-40 0.00E+00 + 6.32E+02 5.96E+01 CR-51 3.70E+01 + 4.47E+01 6.15E+01 CR-51 -1.03E+01 + 3.34E+01 4.71E+01 MN-54 1.24E+00 + 2.83E+00 3.69E+00 MN-54 5.31E-01 + 3.08E+00 4.06E+00 CO-58 -1.07E+00 + 4.41E+00 5.77E+00 CO-58 1.12E-01 + 2.98E+00 4.01E+00 FE-59 -7.28E+00 + 1.61E+01 1.99E+01 FE-59 -9.22E-01 + 1.09E+01 1.39E+01 CO-60 9.16E-01 + 2.70E+00 3.43E+00 CO-60 -1.11E+00 + 3.74E+00 4.68E+00 ZN-65 -2.30E+00 + 6.76E+00 8.67E+00 ZN-65 4.49E+00 + 5.64E+00 7.01E+00 ZRNB-95 -3.40E+00 + 8.37E+00 1.11E+01 ZRNB-95 -1.22E+00 + 5.89E+00 7.98E+00 I-131 -1.17E+01 + 4.62E+01 6.55E+01 I-131 1.66E-01 + 9.30E+00 1.34E+01 CS-134 -4.02E-01 + 2.62E+00 3.65E+00 CS-134 2.18E+00 + 2.53E+00 3.38E+00 CS-137 -2.61E+00 + 3.81E+00 4.97E+00 CS-137 -6.56E-01 + 3.02E+00 4.08E+00 BALA140 -6.78E-01 + 1.88E+01 2.43E+01 BALA140 5.38E+00 + 4.61E+00 9.01E+00 BI-214 1.77E+00 + 7.42E+00 1.06E+01 BI-214 9.16E+00 + 8.02E+00 1.09E+01 Location ST-101B collected 4/1/2019 Location ST-101B collected 5/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.14E+01 + 4.64E+01 6.27E+01 K-40 1.63E+01 + 3.47E+01 5.00E+01 CR-51 -6.21E-01 + 2.89E+01 4.29E+01 CR-51 1.37E+01 + 2.78E+01 3.91E+01 MN-54 -1.58E+00 + 3.53E+00 4.68E+00 MN-54 1.14E+00 + 3.14E+00 4.10E+00 CO-58 4.42E-01 + 2.76E+00 3.80E+00 CO-58 -9.36E-01 + 3.16E+00 4.17E+00 FE-59 -4.34E+00 + 1.15E+01 1.47E+01 FE-59 3.01E+00 + 9.91E+00 1.25E+01 CO-60 -1.56E+00 + 3.78E+00 4.81E+00 CO-60 1.60E+00 + 2.99E+00 3.71E+00 ZN-65 -2.76E+00 + 6.66E+00 8.71E+00 ZN-65 1.72E+00 + 5.82E+00 7.53E+00 ZRNB-95 -1.01E+00 + 5.06E+00 7.14E+00 ZRNB-95 3.41E+00 + 4.72E+00 6.21E+00 I-131 1.89E+00 + 7.84E+00 1.16E+01 I-131 3.28E+00 + 1.11E+01 1.58E+01 CS-134 -1.07E+00 + 2.52E+00 3.58E+00 CS-134 -9.94E-01 + 3.06E+00 4.20E+00 CS-137 1.08E+00 + 2.51E+00 3.48E+00 CS-137 -1.49E+00 + 3.22E+00 4.27E+00 BALA140 1.06E+00 + 7.01E+00 9.21E+00 BALA140 4.08E+00 + 8.15E+00 1.01E+01 BI-214 4.74E+00 + 6.71E+00 9.68E+00 BI-214 3.68E+00 + 6.31E+00 9.76E+00 Location ST-101B collected 5/30/2019 Location ST-101B collected 7/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.02E+00 + 3.91E+01 5.61E+01 K-40 1.58E+01 + 3.91E+01 5.52E+01 CR-51 -7.55E-01 + 3.73E+01 5.31E+01 CR-51 -1.84E+01 + 3.56E+01 4.96E+01 MN-54 9.22E-01 + 2.99E+00 4.01E+00 MN-54 2.24E+00 + 2.43E+00 3.14E+00 CO-58 -3.72E-01 + 3.72E+00 5.04E+00 CO-58 6.42E-01 + 3.16E+00 4.28E+00 FE-59 2.01E+00 + 8.19E+00 1.07E+01 FE-59 2.69E+00 + 7.96E+00 1.03E+01 CO-60 6.16E-01 + 3.29E+00 4.28E+00 CO-60 1.93E+00 + 2.99E+00 3.76E+00 ZN-65 -2.76E+00 + 6.85E+00 8.93E+00 ZN-65 -5.43E+00 + 8.52E+00 1.09E+01 ZRNB-95 3.08E+00 + 4.95E+00 6.75E+00 ZRNB-95 -1.50E+00 + 6.67E+00 9.23E+00 I-131 8.24E+00 + 1.05E+01 1.46E+01 I-131 2.60E+00 + 9.37E+00 1.32E+01 CS-134 -4.57E-01 + 3.21E+00 4.43E+00 CS-134 9.93E-01 + 3.17E+00 4.34E+00 CS-137 -2.13E+00 + 3.75E+00 5.07E+00 CS-137 7.28E-01 + 3.21E+00 4.44E+00 BALA140 1.69E+00 + 7.10E+00 9.24E+00 BALA140 -7.04E+00 + 1.13E+01 1.37E+01 BI-214 8.31E-01 + 7.95E+00 1.14E+01 BI-214 -1.36E+01 + 8.43E+00 1.27E+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-101B collected 7/31/2019 Location ST-101B collected 8/29/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 -2.28E+01 + 4.91E+01 7.23E+01 K-40 -1.63E+01 + 4.18E+01 6.13E+01 CR-51 6.03E+00 + 3.23E+01 4.74E+01 CR-51 -4.12E+00 + 3.71E+01 5.39E+01 MN-54 2.06E-01 + 2.96E+00 4.17E+00 MN-54 -1.32E+00 + 3.58E+00 4.72E+00 CO-58 -5.69E-01 + 3.30E+00 4.62E+00 CO-58 4.94E-01 + 3.04E+00 4.21E+00 FE-59 7.12E+00 + 7.64E+00 9.61E+00 FE-59 3.92E+00 + 1.01E+01 1.28E+01 CO-60 4.87E-01 + 3.15E+00 4.39E+00 CO-60 + 8.58E+00 + 2.41E+00 2.93E+00 ZN-65 7.11E-01 + 6.66E+00 9.16E+00 ZN-65 3.93E-01 + 6.42E+00 8.46E+00 ZRNB-95 3.19E+00 + 5.26E+00 7.17E+00 ZRNB-95 2.02E+00 + 5.95E+00 8.14E+00 I-131 -1.00E+00 + 8.62E+00 1.27E+01 I-131 1.98E+00 + 1.22E+01 1.78E+01 CS-134 -7.30E-01 + 2.96E+00 4.22E+00 CS-134 -1.69E+00 + 3.49E+00 5.82E+00 CS-137 -2.10E+00 + 3.90E+00 5.45E+00 CS-137 -8.15E-01 + 3.64E+00 4.96E+00 BALA140 -1.61E+00 + 8.18E+00 1.07E+01 BALA140 3.23E+00 + 9.72E+00 1.21E+01 BI-214 -1.35E+00 + 7.89E+00 1.16E+01 BI-214 + 1.50E+01 + 4.60E+00 5.62E+00 Location ST-101B collected 10/1/2019 Location ST-101B collected 10/31/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.24E+01 + 4.02E+01 5.76E+01 K-40 1.77E+01 + 4.04E+01 5.62E+01 CR-51 -1.35E+01 + 3.51E+01 5.09E+01 CR-51 -5.41E+00 + 4.28E+01 6.03E+01 MN-54 -1.28E+00 + 3.20E+00 4.40E+00 MN-54 1.32E-01 + 3.25E+00 4.41E+00 CO-58 2.22E-01 + 3.66E+00 5.13E+00 CO-58 -6.47E-01 + 3.55E+00 4.79E+00 FE-59 1.84E+00 + 9.30E+00 1.25E+01 FE-59 -2.61E+00 + 1.03E+01 1.33E+01 CO-60 8.18E-01 + 3.18E+00 4.36E+00 CO-60 8.55E-01 + 3.25E+00 4.19E+00 ZN-65 9.75E-01 + 7.15E+00 9.75E+00 ZN-65 3.45E-01 + 7.65E+00 1.32E+01 ZRNB-95 2.14E+00 + 5.96E+00 8.23E+00 ZRNB-95 -1.90E-01 + 5.81E+00 8.19E+00 I-131 -7.14E-01 + 9.71E+00 1.43E+01 I-131 -3.54E+00 + 1.31E+01 1.85E+01 CS-134 -8.68E-01 + 3.13E+00 4.44E+00 CS-134 5.98E-01 + 5.17E+00 8.69E+00 CS-137 1.04E+00 + 3.14E+00 4.47E+00 CS-137 -2.42E+00 + 4.05E+00 5.46E+00 BALA140 5.48E+00 + 8.56E+00 1.08E+01 BALA140 5.01E+00 + 8.71E+00 1.08E+01 BI-214 6.42E+00 + 7.21E+00 1.02E+01 BI-214 + 4.31E+01 + 9.60E+00 1.07E+01 Location ST-101B collected 12/2/2019 Location ST-101B collected 1/2/2020 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.94E+01 + 4.30E+01 6.01E+01 K-40 4.71E+00 + 4.41E+01 6.47E+01 CR-51 1.94E+00 + 3.41E+01 5.03E+01 CR-51 8.84E+00 + 3.50E+01 5.12E+01 MN-54 -6.17E-01 + 3.58E+00 4.97E+00 MN-54 -5.12E-01 + 3.10E+00 4.33E+00 CO-58 -1.15E-01 + 3.59E+00 5.06E+00 CO-58 -5.83E-01 + 3.22E+00 4.52E+00 FE-59 2.24E+00 + 8.78E+00 1.18E+01 FE-59 2.87E+00 + 8.54E+00 1.14E+01 CO-60 2.87E-01 + 3.27E+00 4.55E+00 CO-60 2.85E+00 + 2.12E+00 4.18E+00 ZN-65 -4.93E+00 + 9.95E+00 1.31E+01 ZN-65 2.28E+00 + 6.14E+00 8.31E+00 ZRNB-95 -4.59E+00 + 8.03E+00 1.09E+01 ZRNB-95 -1.43E+00 + 6.21E+00 8.65E+00 I-131 2.22E+00 + 9.55E+00 1.40E+01 I-131 3.19E-01 + 1.12E+01 1.66E+01 CS-134 -1.25E+00 + 4.53E+00 7.62E+00 CS-134 -1.21E+00 + 3.14E+00 4.43E+00 CS-137 -5.70E-01 + 3.46E+00 4.96E+00 CS-137 5.27E-01 + 2.97E+00 4.28E+00 BALA140 1.11E+00 + 7.80E+00 1.04E+01 BALA140 8.76E-02 + 9.05E+00 1.21E+01 BI-214 + 1.92E+01 + 7.23E+00 9.54E+00 BI-214 3.34E+00 + 8.35E+00 1.20E+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 Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 1.25E+01 -2.28E+01 5.14E+01 6.12E+01 12 0 CR-51 1.22E+00 -1.84E+01 3.70E+01 5.06E+01 12 0 MN-54 9.21E-02 -1.58E+00 2.24E+00 4.22E+00 12 0 CO-58 -1.98E-01 -1.07E+00 6.42E-01 4.62E+00 12 0 FE-59 8.80E-01 -7.28E+00 7.12E+00 1.28E+01 12 0 CO-60 1.36E+00 -1.56E+00 8.58E+00 4.11E+00 12 1 ZN-65 -6.05E-01 -5.43E+00 4.49E+00 9.48E+00 12 0 ZRNB-95 -5.50E-02 -4.59E+00 3.41E+00 8.43E+00 12 0 I-131 3.09E-01 -1.17E+01 8.24E+00 1.90E+01 12 0 CS-134 -4.08E-01 -1.69E+00 2.18E+00 4.90E+00 12 0 CS-137 -7.84E-01 -2.61E+00 1.08E+00 4.66E+00 12 0 BALA140 1.48E+00 -7.04E+00 5.48E+00 1.19E+01 12 0 BI-214 7.70E+00 -1.36E+01 4.31E+01 1.04E+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 12/31/18 - 01/31/19 1.78E+00 + 6.90E-01 2.10E+00 01/31/19 - 03/01/19 1.29E+00 + 6.83E-01 2.16E+00 03/01/19 - 04/01/19 6.25E-02 + 7.06E-01 2.48E+00 04/01/19 - 05/01/19 1.61E+00 + 8.03E-01 2.44E+00 05/01/19 - 05/30/19 4.01E-02 + 5.84E-01 2.13E+00 05/30/19 - 07/01/19 2.75E+00 + 1.05E+00 3.20E+00 07/01/19 - 07/31/19 1.14E+00 + 6.44E-01 2.06E+00 07/31/19 - 08/29/19 + 2.57E+00 + 8.37E-01 2.46E+00 08/29/19 - 10/01/19 + 3.62E+00 + 6.86E-01 1.59E+00 10/01/19 - 10/31/19 2.35E+00 + 8.34E-01 2.51E+00 10/31/19 - 12/02/19 1.06E+00 + 6.48E-01 2.12E+00 12/02/19 - 01/02/20 1.30E+00 + 6.50E-01 2.06E+00 TABLE B-3.2 GROSS BETA IN STORM DRAIN WATER -

SUMMARY

Results in pCi/liter Average Activity Activity Number of Number of Activity Low High Samples Positive IDs 1.63E+00 4.01E-02 3.62E+00 12 2 TABLE B-4.1 TRITIUM IN STORM DRAIN WATER Results in pCi/liter Location Collection Period RQ Activity Error ST-101B 12/31/18 - 01/31/19 + 9.97E+03 + 2.49E+02 01/31/19 - 03/01/19 + 1.24E+04 + 2.75E+02 03/01/19 - 04/01/19 + 7.37E+03 + 2.20E+02 04/01/19 - 05/01/19 + 3.19E+03 + 1.54E+02 05/01/19 - 05/30/19 + 3.01E+02 + 9.37E+01 05/30/19 - 07/01/19 1.97E+02 + 9.40E+01 07/01/19 - 07/31/19 + 1.07E+03 + 1.16E+02 07/31/19 - 08/29/19 + 2.13E+03 + 1.45E+02 08/29/19 - 10/01/19 + 1.67E+03 + 1.32E+02 10/01/19 - 10/31/19 + 7.31E+02 + 1.07E+02 10/31/19 - 12/02/19 + 1.14E+04 + 2.62E+02 12/02/19 - 01/02/20 + 9.05E+03 + 2.39E+02 TABLE B-4.2 TRITIUM IN STORM DRAIN WATER -

SUMMARY

Results in pCi/liter Average Activity Activity Number of Number of Activity Low High Samples Positive IDs 4.96E+03 1.97E+02 1.24E+04 12 11 RQ = Results Qualifier. If blank, 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 12/31/18 - 01/31/19 -1.26E+00 + 1.32E+00 4.80E+00 01/31/19 - 03/01/19 5.20E+00 + 1.53E+00 4.93E+00 03/01/19 - 04/01/19 -1.91E+00 + 1.80E+00 6.05E+00 04/01/19 - 05/01/19 -1.67E+00 + 2.04E+00 6.94E+00 05/01/19 - 05/30/19 1.71E+00 + 1.03E+00 3.41E+00 05/30/19 - 07/01/19 9.56E-01 + 1.02E+00 3.44E+00 07/01/19 - 07/31/19 -2.70E+00 + 8.54E-01 2.95E+00 07/31/19 - 08/29/19 -1.13E+00 + 8.93E-01 3.66E+00 08/29/19 - 10/01/19 -2.75E-01 + 1.20E+00 5.01E+00 10/01/19 - 10/31/19 -1.78E-16 + 5.53E-01 2.46E+00 10/31/19 - 12/02/19 5.50E-02 + 3.61E-01 1.64E+00 12/02/19 - 01/02/20 -1.47E-16 + 4.55E-01 2.03E+00 TABLE B-5.2 GROSS ALPHA IN SANITARY WASTE TREATMENT WATER -

SUMMARY

Results in pCi/liter Number Number of Average Activity Activity of Positive Location Activity Low High Samples IDs ST-102B -8.59E-02 -2.70E+00 5.20E+00 12 0 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 12/31/18 - 01/31/19 + 1.61E+01 + 1.78E+00 3.60E+00 01/31/19 - 03/01/19 + 2.12E+01 + 1.24E+00 2.58E+00 03/01/19 - 04/01/19 + 8.67E+00 + 1.31E+00 3.98E+00 04/01/19 - 05/01/19 + 1.82E+01 + 1.24E+00 3.37E+00 05/01/19 - 05/30/19 + 2.10E+01 + 1.33E+00 3.54E+00 05/30/19 - 07/01/19 + 1.62E+01 + 1.27E+00 3.55E+00 07/01/19 - 07/31/19 + 1.15E+01 + 8.30E-01 2.05E+00 07/31/19 - 08/29/19 + 1.06E+01 + 9.36E-01 2.44E+00 08/29/19 - 10/01/19 + 1.18E+01 + 1.73E+00 3.56E+00 10/01/19 - 10/31/19 + 1.09E+01 + 1.24E+00 2.67E+00 10/31/19 - 12/02/19 9.25E-01 + 6.33E-01 2.10E+00 12/02/19 - 01/02/20 + 5.12E+00 + 8.62E-01 2.12E+00 TABLE B-6.2 GROSS BETA IN SANITARY WASTE TREATMENT WATER -

SUMMARY

Results in pCi/liter Number Number of Average Activity Activity of Positive Location Activity Low High Samples IDs ST-102B 1.27E+01 9.25E-01 2.12E+01 12 11 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 1/31/2019 Location ST-102B collected 3/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 6.15E+01 + 2.31E+01 2.64E+01 K-40 + 7.50E+01 + 5.20E+01 6.66E+01 CR-51 -1.55E+01 + 2.80E+01 3.86E+01 CR-51 -2.41E+01 + 4.41E+01 6.09E+01 MN-54 -3.80E-01 + 1.60E+00 2.04E+00 MN-54 1.98E+00 + 3.80E+00 4.83E+00 CO-58 -6.34E-02 + 2.03E+00 2.62E+00 CO-58 3.89E-02 + 3.98E+00 5.17E+00 FE-59 6.81E+00 + 5.92E+00 6.97E+00 FE-59 2.48E+00 + 1.05E+01 1.29E+01 CO-60 -7.78E-02 + 1.54E+00 1.90E+00 CO-60 2.79E+00 + 3.87E+00 4.55E+00 ZN-65 1.60E-01 + 3.19E+00 4.03E+00 ZN-65 -1.61E+00 + 8.71E+00 1.06E+01 ZRNB-95 -7.87E-01 + 3.67E+00 4.84E+00 ZRNB-95 3.67E+00 + 7.56E+00 9.62E+00 I-131 -1.76E+01 + 3.13E+01 4.33E+01 I-131 -1.19E+01 + 1.30E+01 1.78E+01 CS-134 1.24E+00 + 1.33E+00 1.77E+00 CS-134 -1.17E+00 + 4.03E+00 5.28E+00 CS-137 1.13E+00 + 1.38E+00 1.78E+00 CS-137 3.18E-01 + 3.89E+00 5.16E+00 BALA140 -4.43E+00 + 1.46E+01 1.74E+01 BALA140 0.00E+00 + 3.79E+00 1.38E+01 BI-214 6.11E-01 + 4.22E+00 5.31E+00 BI-214 3.15E+00 + 1.16E+01 1.48E+01 Location ST-102B collected 4/1/2019 Location ST-102B collected 5/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 9.80E+01 + 4.44E+01 5.59E+01 K-40 + 1.22E+02 + 4.45E+01 5.53E+01 CR-51 6.31E+00 + 3.84E+01 5.37E+01 CR-51 1.70E+01 + 4.59E+01 6.40E+01 MN-54 1.49E-01 + 3.51E+00 4.54E+00 MN-54 -2.04E+00 + 3.99E+00 5.06E+00 CO-58 1.91E-01 + 3.64E+00 4.72E+00 CO-58 -4.83E-01 + 4.20E+00 5.43E+00 FE-59 -3.37E+00 + 1.16E+01 1.42E+01 FE-59 -1.84E+00 + 1.23E+01 1.52E+01 CO-60 2.80E+00 + 3.25E+00 3.80E+00 CO-60 3.57E+00 + 3.02E+00 4.63E+00 ZN-65 -2.02E+00 + 7.73E+00 9.44E+00 ZN-65 -1.49E+00 + 8.32E+00 1.02E+01 ZRNB-95 -2.24E+00 + 7.46E+00 9.54E+00 ZRNB-95 5.45E+00 + 7.14E+00 9.00E+00 I-131 -2.77E+00 + 1.12E+01 1.57E+01 I-131 7.75E+00 + 2.45E+01 3.41E+01 CS-134 -1.00E+00 + 3.98E+00 5.22E+00 CS-134 2.52E+00 + 3.38E+00 4.37E+00 CS-137 1.57E+00 + 3.52E+00 4.61E+00 CS-137 8.24E-01 + 3.50E+00 4.63E+00 BALA140 0.00E+00 + 1.79E+00 1.23E+01 BALA140 0.00E+00 + 1.06E+00 2.01E+01 BI-214 3.58E+00 + 5.33E+00 1.25E+01 BI-214 0.00E+00 + 7.44E+00 1.61E+01 Location ST-102B collected 5/30/2019 Location ST-102B collected 7/1/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.20E+02 + 4.73E+01 6.01E+01 K-40 + 1.14E+02 + 5.45E+01 6.80E+01 CR-51 8.58E+00 + 4.31E+01 6.23E+01 CR-51 1.01E+01 + 4.51E+01 6.51E+01 MN-54 5.34E-01 + 3.40E+00 4.66E+00 MN-54 2.18E+00 + 3.79E+00 5.09E+00 CO-58 -5.34E-01 + 3.83E+00 5.24E+00 CO-58 -6.54E-01 + 4.37E+00 5.98E+00 FE-59 4.83E+00 + 9.78E+00 1.26E+01 FE-59 -7.96E+00 + 1.31E+01 1.67E+01 CO-60 -1.58E+00 + 3.60E+00 4.92E+00 CO-60 3.58E+00 + 3.85E+00 4.95E+00 ZN-65 -1.55E+00 + 8.30E+00 1.40E+01 ZN-65 -1.08E+00 + 8.17E+00 1.09E+01 ZRNB-95 4.04E+00 + 6.98E+00 9.39E+00 ZRNB-95 -2.45E+00 + 8.15E+00 1.11E+01 I-131 1.99E+00 + 1.41E+01 2.04E+01 I-131 6.21E+00 + 1.20E+01 1.72E+01 CS-134 -2.26E+00 + 4.95E+00 8.21E+00 CS-134 -4.03E-01 + 5.03E+00 8.43E+00 CS-137 -1.93E+00 + 3.80E+00 5.29E+00 CS-137 -2.59E+00 + 4.54E+00 6.29E+00 BALA140 -1.47E+00 + 9.84E+00 1.26E+01 BALA140 -1.29E+00 + 1.04E+01 1.33E+01 BI-214 + 3.39E+01 + 6.64E+00 7.67E+00 BI-214 + 3.84E+01 + 7.65E+00 8.83E+00 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 7/31/2019 Location ST-102B collected 8/29/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.36E+02 + 5.48E+01 7.01E+01 K-40 + 1.64E+02 + 5.49E+01 6.30E+01 CR-51 2.53E+01 + 5.44E+01 7.53E+01 CR-51 6.09E+00 + 5.19E+01 7.24E+01 MN-54 -1.33E+00 + 5.21E+00 6.84E+00 MN-54 -2.70E+00 + 4.70E+00 6.11E+00 CO-58 8.40E-01 + 4.99E+00 6.61E+00 CO-58 -1.27E+00 + 4.79E+00 6.30E+00 FE-59 -3.98E+00 + 1.45E+01 1.82E+01 FE-59 -5.31E+00 + 1.38E+01 1.72E+01 CO-60 -1.59E+00 + 5.08E+00 6.35E+00 CO-60 2.18E+00 + 3.60E+00 4.47E+00 ZN-65 -6.13E+00 + 1.18E+01 1.50E+01 ZN-65 -6.32E+00 + 9.38E+00 1.19E+01 ZRNB-95 1.36E+00 + 9.61E+00 1.27E+01 ZRNB-95 6.32E+00 + 7.86E+00 1.02E+01 I-131 9.97E+00 + 1.39E+01 1.91E+01 I-131 7.87E+00 + 1.67E+01 2.31E+01 CS-134 -3.25E+00 + 6.18E+00 1.03E+01 CS-134 3.01E-01 + 5.47E+00 9.15E+00 CS-137 2.23E+00 + 5.42E+00 7.29E+00 CS-137 -2.04E+00 + 4.71E+00 6.33E+00 BALA140 -2.92E+00 + 1.18E+01 1.45E+01 BALA140 -7.21E+00 + 1.30E+01 1.57E+01 BI-214 + 4.34E+01 + 8.97E+00 1.07E+01 BI-214 + 4.21E+01 + 1.11E+01 1.22E+01 Location ST-102B collected 10/1/2019 Location ST-102B collected 10/31/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 2.39E+02 + 4.45E+01 3.77E+01 K-40 + 1.48E+02 + 5.25E+01 6.13E+01 CR-51 -2.39E+01 + 4.98E+01 7.14E+01 CR-51 1.83E+00 + 5.34E+01 7.46E+01 MN-54 -1.21E+00 + 3.90E+00 5.28E+00 MN-54 -3.10E+00 + 4.83E+00 6.26E+00 CO-58 -1.41E+00 + 4.28E+00 5.81E+00 CO-58 2.80E+00 + 4.59E+00 5.98E+00 FE-59 3.33E+00 + 1.07E+01 1.38E+01 FE-59 4.62E+00 + 1.11E+01 1.39E+01 CO-60 -8.11E-01 + 3.55E+00 4.82E+00 CO-60 -3.45E+00 + 5.06E+00 6.22E+00 ZN-65 -2.74E+00 + 8.58E+00 1.13E+01 ZN-65 -7.28E+00 + 1.08E+01 1.36E+01 ZRNB-95 -3.67E+00 + 7.88E+00 1.06E+01 ZRNB-95 -8.50E-01 + 9.00E+00 1.19E+01 I-131 -1.97E+00 + 1.73E+01 2.51E+01 I-131 -1.32E+00 + 1.80E+01 2.52E+01 CS-134 -3.02E-01 + 4.79E+00 8.02E+00 CS-134 -1.65E+00 + 5.84E+00 9.73E+00 CS-137 -4.03E-01 + 3.68E+00 5.20E+00 CS-137 7.49E-01 + 4.34E+00 5.89E+00 BALA140 -9.07E+00 + 1.35E+01 1.66E+01 BALA140 -4.36E+00 + 1.27E+01 1.55E+01 BI-214 + 2.82E+01 + 7.54E+00 9.18E+00 BI-214 + 5.63E+01 + 1.04E+01 1.11E+01 Location ST-102B collected 12/2/2019 Location ST-102B collected 1/2/2020 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.80E+02 + 5.45E+01 6.50E+01 K-40 + 1.23E+02 + 5.14E+01 6.53E+01 CR-51 4.54E+00 + 4.71E+01 6.82E+01 CR-51 9.92E-01 + 4.92E+01 7.14E+01 MN-54 -1.24E+00 + 4.01E+00 5.44E+00 MN-54 3.65E-01 + 4.03E+00 5.51E+00 CO-58 -1.65E+00 + 4.51E+00 6.11E+00 CO-58 -2.62E+00 + 4.77E+00 6.42E+00 FE-59 -2.69E+00 + 1.28E+01 1.65E+01 FE-59 5.60E+00 + 1.21E+01 1.55E+01 CO-60 -5.74E-01 + 3.98E+00 5.36E+00 CO-60 -2.99E+00 + 3.87E+00 5.23E+00 ZN-65 0.00E+00 + 5.46E+00 1.61E+01 ZN-65 -5.65E-01 + 8.23E+00 1.10E+01 ZRNB-95 2.48E+00 + 7.69E+00 1.04E+01 ZRNB-95 1.80E+00 + 7.82E+00 1.07E+01 I-131 5.32E-01 + 1.40E+01 2.03E+01 I-131 -9.66E+00 + 1.85E+01 2.65E+01 CS-134 -9.95E-01 + 5.36E+00 8.95E+00 CS-134 -1.29E+00 + 4.96E+00 8.28E+00 CS-137 2.70E+00 + 4.05E+00 5.60E+00 CS-137 -2.60E+00 + 4.65E+00 6.45E+00 BALA140 -8.76E+00 + 1.30E+01 1.60E+01 BALA140 -9.14E-01 + 1.27E+01 1.62E+01 BI-214 + 2.35E+01 + 9.35E+00 1.19E+01 BI-214 + 2.87E+01 + 7.38E+00 8.68E+00 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 Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 1.32E+02 6.15E+01 2.39E+02 5.79E+01 12 12 CR-51 1.44E+00 -2.41E+01 2.53E+01 6.48E+01 12 0 MN-54 -5.67E-01 -3.10E+00 2.18E+00 5.14E+00 12 0 CO-58 -4.02E-01 -2.62E+00 2.80E+00 5.53E+00 12 0 FE-59 2.10E-01 -7.96E+00 6.81E+00 1.45E+01 12 0 CO-60 3.20E-01 -3.45E+00 3.58E+00 4.77E+00 12 0 ZN-65 -2.55E+00 -7.28E+00 1.60E-01 1.15E+01 12 0 ZRNB-95 1.34E+00 -2.74E+00 6.32E+00 1.01E+01 12 0 I-131 -9.10E-01 -1.76E+01 9.97E+00 2.40E+01 12 0 CS-134 -6.88E-01 -3.25E+00 2.52E+00 7.30E+00 12 0 CS-137 -4.16E-03 -2.60E+00 2.70E+00 5.38E+00 12 0 BALA140 -3.37E+00 -9.07E+00 0.00E+00 1.53E+01 12 0 BI-214 2.52E+01 0.00E+00 5.63E+01 1.07E+01 12 8 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 12/31/18 - 01/31/19 1.48E+02 + 9.32E+01 01/31/19 - 03/01/19 1.50E+02 + 9.25E+01 03/01/19 - 04/01/19 1.01E+02 + 9.31E+01 04/01/19 - 05/01/19 1.02E+02 + 8.96E+01 05/01/19 - 05/30/19 -1.38E+02 + 9.36E+01 05/30/19 - 07/01/19 1.45E+02 + 9.14E+01 07/01/19 - 07/31/19 9.18E+01 + 9.20E+01 07/31/19 - 08/29/19 1.13E+00 + 6.16E+01 08/29/19 - 10/01/19 8.05E+01 + 9.48E+01 10/01/19 - 10/31/19 1.40E+02 + 9.05E+01 10/31/19 - 12/02/19 2.39E+02 + 9.18E+01 12/02/19 - 01/02/20 1.11E+02 + 9.35E+01 TABLE B-8.2 TRITIUM IN SANITARY WASTE TREATMENT WATER -

SUMMARY

Results in pCi/liter Number of Average Activity Activity Number of Positive Station Description Activity Low High Samples IDs 102B SWTF Headworks 9.76E+01 -1.38E+02 2.39E+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

TABLE B-9.1 GAMMA SPECTROMETRY RESULTS OF CGS POST DISPOSAL COOLING TOWER SEDIMENT Results in pCi/kilogram dry material Location & Date 119B 6/20/2019 Location & Date 119B 11/11/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.76E+04 + 1.13E+03 4.89E+02 BE-7 + 3.17E+03 + 6.23E+02 5.73E+02 K-40 + 9.93E+03 + 1.01E+03 4.02E+02 K-40 + 1.10E+04 + 1.23E+03 5.82E+02 CR-51 1.69E+02 + 5.07E+02 7.41E+02 CR-51 1.41E+02 + 4.63E+02 6.84E+02 MN-54 -5.21E+00 + 4.28E+01 6.08E+01 MN-54 1.59E+01 + 4.96E+01 6.98E+01 CO-58 -1.51E+01 + 4.88E+01 6.81E+01 CO-58 0.00E+00 + 1.71E+01 6.73E+01 FE-59 4.43E+01 + 1.03E+02 1.39E+02 FE-59 -9.15E+01 + 1.93E+02 2.52E+02 CO-60 2.63E+01 + 4.80E+01 6.34E+01 CO-60 + 2.29E+02 + 4.39E+01 3.48E+01 ZN-65 1.66E+00 + 1.19E+02 2.06E+02 ZN-65 -7.43E+01 + 1.64E+02 2.77E+02 ZRNB-95 1.66E+01 + 6.89E+01 9.80E+01 ZRNB-95 3.76E+01 + 7.18E+01 1.00E+02 CS-134 -2.20E+01 + 7.07E+01 1.19E+02 CS-134 2.37E+01 + 8.08E+01 1.36E+02 CS-137 7.47E+01 + 5.92E+01 7.69E+01 CS-137 + 1.61E+02 + 6.45E+01 7.24E+01 BALA140 -8.26E+01 + 1.27E+02 1.60E+02 BALA140 -4.43E+01 + 9.57E+01 1.24E+02 BI-214 + 5.49E+02 + 9.73E+01 9.00E+01 BI-214 + 5.79E+02 + 1.25E+02 1.25E+02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 1

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING SAMPLES Results in pCi/liter Station MW-3 collected 1/29/2019 Station MW-10 collected 1/30/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.27E+01 + 1.01E+02 1.33E+02 K-40 8.91E+01 + 8.78E+01 1.15E+02 MN-54 -1.40E+00 + 7.46E+00 9.71E+00 MN-54 1.15E+00 + 7.22E+00 9.43E+00 CO-58 7.73E-01 + 7.67E+00 1.00E+01 CO-58 -1.08E+00 + 7.00E+00 9.21E+00 FE-59 2.37E+00 + 1.80E+01 2.26E+01 FE-59 9.24E+00 + 1.85E+01 2.29E+01 CO-60 -2.84E+00 + 8.96E+00 1.08E+01 CO-60 -2.36E+00 + 8.97E+00 1.08E+01 ZN-65 -1.08E+01 + 1.99E+01 2.40E+01 ZN-65 0.00E+00 + 6.77E+00 2.39E+01 ZRNB-95 6.63E+00 + 1.17E+01 1.50E+01 ZRNB-95 -1.07E+01 + 1.61E+01 2.05E+01 I-131 3.30E+00 + 7.53E+00 1.05E+01 I-131 -3.22E+00 + 1.95E+01 2.76E+01 CS-134 -3.91E+00 + 8.76E+00 1.15E+01 CS-134 -4.74E-01 + 6.77E+00 9.08E+00 CS-137 6.64E+00 + 7.64E+00 9.88E+00 CS-137 -1.49E+00 + 7.63E+00 1.02E+01 BALA140 3.99E+00 + 7.65E+00 9.05E+00 BALA140 -2.93E-01 + 1.71E+01 2.08E+01 BI-214 + 6.48E+02 + 4.02E+01 2.78E+01 BI-214 + 1.77E+02 + 2.54E+01 2.56E+01 Station MW-5 collected 1/29/2019 Station MW-11 collected 1/30/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.47E+01 + 8.46E+01 1.12E+02 K-40 4.15E+01 + 7.56E+01 1.06E+02 MN-54 2.02E+00 + 6.33E+00 8.24E+00 MN-54 2.17E+00 + 5.99E+00 7.80E+00 CO-58 -5.14E+00 + 7.68E+00 9.75E+00 CO-58 1.92E+00 + 6.71E+00 8.77E+00 FE-59 -1.11E+01 + 2.13E+01 2.59E+01 FE-59 5.73E+00 + 1.73E+01 2.18E+01 CO-60 3.42E+00 + 6.29E+00 7.59E+00 CO-60 0.00E+00 + 2.22E+00 9.77E+00 ZN-65 -2.85E+00 + 1.49E+01 1.86E+01 ZN-65 -1.03E+01 + 1.77E+01 2.15E+01 ZRNB-95 0.00E+00 + 5.61E+00 1.87E+01 ZRNB-95 -5.04E+00 + 1.35E+01 1.74E+01 I-131 -4.82E+00 + 7.73E+00 1.07E+01 I-131 5.96E+00 + 1.74E+01 2.46E+01 CS-134 2.74E+00 + 7.07E+00 9.34E+00 CS-134 3.45E+00 + 6.24E+00 8.20E+00 CS-137 -2.38E+00 + 7.17E+00 9.55E+00 CS-137 -3.18E-02 + 6.51E+00 8.86E+00 BALA140 3.70E+00 + 8.56E+00 1.02E+01 BALA140 0.00E+00 + 8.26E+00 2.32E+01 BI-214 + 1.76E+02 + 2.47E+01 2.59E+01 BI-214 + 2.62E+01 + 1.79E+01 2.40E+01 Station MW-6 collected 1/29/2019 Station MW-12 collected 1/30/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.27E+01 + 8.51E+01 1.15E+02 K-40 6.43E+01 + 8.92E+01 1.19E+02 MN-54 -2.10E+00 + 7.30E+00 9.47E+00 MN-54 3.34E+00 + 6.34E+00 8.16E+00 CO-58 -2.24E+00 + 6.94E+00 9.02E+00 CO-58 -4.51E-01 + 7.33E+00 9.71E+00 FE-59 -1.04E+01 + 1.99E+01 2.44E+01 FE-59 6.83E+00 + 1.57E+01 1.98E+01 CO-60 0.00E+00 + 1.85E+00 1.15E+01 CO-60 -3.73E-01 + 6.89E+00 8.58E+00 ZN-65 -2.74E+00 + 1.30E+01 1.63E+01 ZN-65 -1.00E+00 + 1.34E+01 1.70E+01 ZRNB-95 -2.22E+00 + 1.21E+01 1.58E+01 ZRNB-95 -1.80E+00 + 1.41E+01 1.85E+01 I-131 -2.19E+00 + 1.01E+01 1.43E+01 I-131 -1.58E+01 + 3.78E+01 5.30E+01 CS-134 -2.80E+00 + 7.45E+00 9.82E+00 CS-134 -3.72E-01 + 6.62E+00 8.90E+00 CS-137 -2.19E+00 + 7.89E+00 1.05E+01 CS-137 1.88E+00 + 6.62E+00 8.86E+00 BALA140 -5.03E+00 + 1.33E+01 1.57E+01 BALA140 1.08E+01 + 1.86E+01 2.22E+01 BI-214 + 9.58E+01 + 2.20E+01 2.48E+01 BI-214 + 5.34E+01 + 1.98E+01 2.46E+01 Station MW-9 collected 1/30/2019 Station MW-13 collected 1/29/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.95E+00 + 8.00E+01 1.12E+02 K-40 5.74E+01 + 8.60E+01 1.15E+02 MN-54 -5.04E+00 + 7.88E+00 1.00E+01 MN-54 0.00E+00 + 3.62E+00 1.07E+01 CO-58 1.97E-01 + 6.39E+00 8.48E+00 CO-58 6.94E+00 + 6.44E+00 8.01E+00 FE-59 5.21E-01 + 1.80E+01 2.29E+01 FE-59 -7.37E+00 + 2.00E+01 2.47E+01 CO-60 1.65E-01 + 6.45E+00 8.08E+00 CO-60 -3.71E-01 + 6.86E+00 8.53E+00 ZN-65 4.08E+00 + 1.42E+01 1.76E+01 ZN-65 6.97E+00 + 1.27E+01 1.56E+01 ZRNB-95 -2.59E+00 + 1.22E+01 1.60E+01 ZRNB-95 0.00E+00 + 2.18E+00 1.95E+01 I-131 2.96E+00 + 1.03E+01 1.46E+01 I-131 -6.21E-01 + 9.44E+00 1.35E+01 CS-134 2.88E-01 + 6.04E+00 8.15E+00 CS-134 4.72E-01 + 7.27E+00 9.72E+00 CS-137 4.57E+00 + 6.05E+00 7.89E+00 CS-137 -3.68E+00 + 8.08E+00 1.07E+01 BALA140 4.70E+00 + 1.06E+01 1.26E+01 BALA140 -1.48E+00 + 1.24E+01 1.50E+01 BI-214 + 1.04E+02 + 2.01E+01 2.27E+01 BI-214 + 1.78E+02 + 2.56E+01 2.56E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 5

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING SAMPLES Results in pCi/liter Station MW-14 collected 1/29/2019 Station MW-MW-9 collected 5/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.66E+00 + 8.28E+01 1.15E+02 K-40 2.98E+01 + 9.67E+01 1.33E+02 MN-54 2.17E+00 + 6.73E+00 8.74E+00 MN-54 3.76E+00 + 6.21E+00 8.19E+00 CO-58 9.85E-01 + 6.44E+00 8.48E+00 CO-58 0.00E+00 + 2.89E+00 8.89E+00 FE-59 2.71E+00 + 1.56E+01 1.98E+01 FE-59 -8.28E+00 + 2.00E+01 2.54E+01 CO-60 -1.24E-01 + 6.84E+00 8.53E+00 CO-60 5.73E+00 + 5.46E+00 6.62E+00 ZN-65 -6.01E+00 + 1.53E+01 1.89E+01 ZN-65 5.13E+00 + 1.01E+01 1.32E+01 ZRNB-95 8.52E+00 + 1.04E+01 1.32E+01 ZRNB-95 3.56E+00 + 9.65E+00 1.34E+01 I-131 5.77E+00 + 9.82E+00 1.37E+01 I-131 3.01E+00 + 9.02E+00 1.32E+01 CS-134 2.91E+00 + 5.97E+00 7.88E+00 CS-134 -2.67E+00 + 6.95E+00 9.47E+00 CS-137 -1.59E+00 + 7.26E+00 9.72E+00 CS-137 -5.92E-01 + 6.67E+00 9.31E+00 BALA140 0.00E+00 + 8.56E-01 1.35E+01 BALA140 5.14E-01 + 9.11E+00 1.16E+01 BI-214 + 7.61E+01 + 1.95E+01 2.38E+01 BI-214 + 1.43E+02 + 2.11E+01 2.21E+01 Station MW-MW-3 collected 4/30/2019 Station MW-MW-10 collected 5/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 6.06E+01 + 8.01E+01 1.09E+02 K-40 1.12E+02 + 8.61E+01 1.12E+02 MN-54 -9.63E-01 + 7.17E+00 9.37E+00 MN-54 6.61E-01 + 6.65E+00 8.74E+00 CO-58 -5.88E-01 + 7.12E+00 9.33E+00 CO-58 0.00E+00 + 4.09E+00 8.48E+00 FE-59 -2.85E+00 + 1.73E+01 2.18E+01 FE-59 3.86E+00 + 1.47E+01 1.87E+01 CO-60 3.46E+00 + 8.09E+00 9.73E+00 CO-60 -1.40E+00 + 7.30E+00 8.96E+00 ZN-65 7.88E+00 + 1.37E+01 1.67E+01 ZN-65 -9.42E+00 + 1.65E+01 2.00E+01 ZRNB-95 4.26E+00 + 1.21E+01 1.56E+01 ZRNB-95 -1.73E-01 + 1.21E+01 1.60E+01 I-131 -2.64E+00 + 8.02E+00 1.12E+01 I-131 -1.07E+01 + 1.29E+01 1.77E+01 CS-134 -2.29E+00 + 7.96E+00 1.05E+01 CS-134 -2.52E+00 + 7.36E+00 9.72E+00 CS-137 2.83E+00 + 7.44E+00 9.88E+00 CS-137 3.46E+00 + 6.13E+00 8.10E+00 BALA140 0.00E+00 + 2.46E+00 1.43E+01 BALA140 0.00E+00 + 3.43E+00 1.60E+01 BI-214 + 3.85E+02 + 3.14E+01 2.59E+01 BI-214 + 7.03E+01 + 2.12E+01 2.50E+01 Station MW-MW-5 collected 4/30/2019 Station MW-MW-11 collected 5/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.47E+01 + 8.46E+01 1.12E+02 K-40 6.51E+01 + 8.34E+01 1.12E+02 MN-54 2.32E+00 + 5.91E+00 7.68E+00 MN-54 4.16E+00 + 6.38E+00 8.15E+00 CO-58 -1.43E+00 + 6.74E+00 8.82E+00 CO-58 -1.92E+00 + 7.22E+00 9.39E+00 FE-59 1.54E+00 + 1.62E+01 2.06E+01 FE-59 1.46E+01 + 1.48E+01 1.76E+01 CO-60 5.03E+00 + 5.07E+00 5.91E+00 CO-60 -2.68E+00 + 7.73E+00 9.37E+00 ZN-65 7.91E+00 + 1.33E+01 1.63E+01 ZN-65 -3.72E-01 + 1.40E+01 1.77E+01 ZRNB-95 -9.67E-01 + 1.08E+01 1.43E+01 ZRNB-95 8.24E+00 + 1.05E+01 1.33E+01 I-131 -1.62E+00 + 9.19E+00 1.31E+01 I-131 -3.85E+00 + 1.17E+01 1.65E+01 CS-134 -1.44E+00 + 6.68E+00 8.90E+00 CS-134 1.29E+00 + 6.87E+00 9.16E+00 CS-137 -1.18E+00 + 6.57E+00 8.86E+00 CS-137 2.06E+00 + 6.62E+00 8.86E+00 BALA140 -4.44E+00 + 1.27E+01 1.50E+01 BALA140 0.00E+00 + 3.34E+00 1.81E+01 BI-214 2.10E+01 + 1.88E+01 2.53E+01 BI-214 + 8.43E+01 + 2.13E+01 2.53E+01 Station MW-6 collected 4/30/2019 Station MW-MW-12 collected 5/7/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.22E+01 + 9.21E+01 1.27E+02 K-40 9.38E+01 + 8.60E+01 1.18E+02 MN-54 -9.73E-01 + 8.01E+00 1.11E+01 MN-54 3.11E+00 + 5.86E+00 7.78E+00 CO-58 5.81E-01 + 6.40E+00 8.94E+00 CO-58 4.19E+00 + 4.34E+00 5.58E+00 FE-59 -7.56E+00 + 1.74E+01 2.26E+01 FE-59 -2.39E+00 + 1.69E+01 2.21E+01 CO-60 1.29E-01 + 6.64E+00 9.21E+00 CO-60 1.33E+00 + 5.47E+00 7.18E+00 ZN-65 6.60E+00 + 2.06E+01 3.47E+01 ZN-65 6.82E+00 + 8.12E+00 1.03E+01 ZRNB-95 6.39E+00 + 1.21E+01 1.65E+01 ZRNB-95 5.63E+00 + 9.09E+00 1.24E+01 I-131 1.36E+00 + 7.66E+00 1.12E+01 I-131 5.66E+00 + 9.23E+00 1.33E+01 CS-134 3.92E+00 + 1.50E+01 2.50E+01 CS-134 -4.78E+00 + 7.06E+00 9.49E+00 CS-137 -5.41E+00 + 9.18E+00 1.28E+01 CS-137 -3.85E+00 + 7.22E+00 9.80E+00 BALA140 3.48E+00 + 8.37E+00 1.07E+01 BALA140 0.00E+00 + 9.74E-01 1.92E+01 BI-214 + 2.55E+02 + 2.73E+01 2.50E+01 BI-214 + 7.41E+01 + 1.93E+01 2.31E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 2 of 5

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING SAMPLES Results in pCi/liter Station MW-MW-13 collected 4/30/2019 Station MW-6 collected 7/30/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 7.13E+01 + 9.35E+01 1.27E+02 K-40 4.62E+01 + 1.06E+02 1.44E+02 MN-54 4.28E-01 + 6.16E+00 8.40E+00 MN-54 1.76E+00 + 6.64E+00 9.17E+00 CO-58 -2.38E+00 + 6.63E+00 8.87E+00 CO-58 -4.58E+00 + 7.73E+00 1.04E+01 FE-59 9.57E+00 + 1.31E+01 1.64E+01 FE-59 -2.45E-01 + 1.69E+01 2.27E+01 CO-60 0.00E+00 + 3.11E+00 1.12E+01 CO-60 -1.25E+00 + 7.30E+00 1.01E+01 ZN-65 1.23E+01 + 1.01E+01 1.23E+01 ZN-65 -8.59E+00 + 2.32E+01 3.88E+01 ZRNB-95 -2.13E+00 + 1.06E+01 1.48E+01 ZRNB-95 2.70E+00 + 1.18E+01 1.63E+01 I-131 -3.82E+00 + 8.99E+00 1.31E+01 I-131 9.59E-01 + 6.97E+00 1.02E+01 CS-134 1.78E+00 + 5.74E+00 7.90E+00 CS-134 -4.44E+00 + 1.50E+01 2.49E+01 CS-137 1.78E+00 + 6.48E+00 8.97E+00 CS-137 -5.03E+00 + 8.75E+00 1.22E+01 BALA140 0.00E+00 + 1.74E+00 1.50E+01 BALA140 2.28E+00 + 8.65E+00 1.12E+01 BI-214 + 9.30E+01 + 2.02E+01 2.18E+01 BI-214 + 2.33E+02 + 2.44E+01 2.16E+01 Station MW-MW-14 collected 4/30/2019 Station MW-9 collected 8/6/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.01E+01 + 8.73E+01 1.19E+02 K-40 2.05E+01 + 9.21E+01 1.26E+02 MN-54 -4.04E-01 + 7.14E+00 9.37E+00 MN-54 -2.15E+00 + 7.56E+00 1.01E+01 CO-58 1.52E+00 + 5.95E+00 7.80E+00 CO-58 -3.67E+00 + 7.59E+00 1.00E+01 FE-59 1.31E+01 + 1.33E+01 1.59E+01 FE-59 -1.73E+00 + 1.92E+01 2.48E+01 CO-60 3.29E-01 + 7.21E+00 8.94E+00 CO-60 -1.58E+00 + 7.97E+00 1.02E+01 ZN-65 0.00E+00 + 8.49E+00 2.22E+01 ZN-65 -5.11E+00 + 1.92E+01 3.24E+01 ZRNB-95 -4.48E+00 + 1.35E+01 1.75E+01 ZRNB-95 -7.94E+00 + 1.37E+01 1.80E+01 I-131 -7.92E-01 + 7.63E+00 1.08E+01 I-131 1.42E+00 + 1.17E+01 1.66E+01 CS-134 -3.91E-01 + 7.48E+00 1.00E+01 CS-134 1.23E+00 + 1.11E+01 1.86E+01 CS-137 1.46E+00 + 6.44E+00 8.67E+00 CS-137 -4.19E+00 + 8.44E+00 1.14E+01 BALA140 1.40E+00 + 8.11E+00 9.84E+00 BALA140 2.29E+00 + 9.11E+00 1.16E+01 BI-214 + 3.22E+02 + 3.02E+01 2.59E+01 BI-214 + 8.56E+01 + 2.05E+01 2.43E+01 Station MW-3 collected 7/30/2019 Station MW-10 collected 8/6/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 1.15E+02 + 7.44E+01 1.35E+02 K-40 6.26E+01 + 9.35E+01 1.30E+02 MN-54 -4.78E+00 + 8.61E+00 1.13E+01 MN-54 -3.77E+00 + 7.05E+00 9.59E+00 CO-58 -1.71E+00 + 7.47E+00 1.00E+01 CO-58 2.89E+00 + 6.36E+00 8.72E+00 FE-59 -4.55E+00 + 1.99E+01 2.54E+01 FE-59 8.62E+00 + 1.40E+01 1.82E+01 CO-60 2.28E+00 + 7.80E+00 9.95E+00 CO-60 8.23E-01 + 7.00E+00 9.59E+00 ZN-65 -3.68E+00 + 2.12E+01 3.59E+01 ZN-65 6.12E+00 + 1.39E+01 2.35E+01 ZRNB-95 -7.98E+00 + 1.56E+01 2.04E+01 ZRNB-95 -7.21E-01 + 1.17E+01 1.64E+01 I-131 4.17E-01 + 1.21E+01 1.72E+01 I-131 -6.47E+00 + 1.25E+01 1.80E+01 CS-134 1.38E+00 + 1.31E+01 2.20E+01 CS-134 -2.43E+00 + 1.02E+01 1.72E+01 CS-137 -3.05E+00 + 8.06E+00 1.10E+01 CS-137 -4.34E-01 + 6.76E+00 9.74E+00 BALA140 -9.11E+00 + 1.51E+01 1.83E+01 BALA140 3.74E+00 + 7.31E+00 9.53E+00 BI-214 + 1.76E+02 + 2.35E+01 2.41E+01 BI-214 + 6.30E+01 + 1.74E+01 2.13E+01 Station MW-5 collected 7/30/2019 Station MW-11 collected 8/6/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.61E+02 + 7.88E+01 1.05E+02 K-40 9.77E+01 + 8.23E+01 1.10E+02 MN-54 -9.91E-01 + 6.89E+00 9.58E+00 MN-54 -6.80E-01 + 7.60E+00 1.02E+01 CO-58 2.47E+00 + 6.07E+00 8.37E+00 CO-58 3.94E-01 + 7.04E+00 9.53E+00 FE-59 -1.34E-01 + 1.67E+01 2.27E+01 FE-59 -2.63E+00 + 1.90E+01 2.45E+01 CO-60 6.53E+00 + 5.90E+00 7.59E+00 CO-60 -5.50E+00 + 8.21E+00 1.02E+01 ZN-65 -1.06E+01 + 1.90E+01 3.17E+01 ZN-65 -3.87E+00 + 1.70E+01 2.89E+01 ZRNB-95 -1.08E+00 + 1.19E+01 1.66E+01 ZRNB-95 -3.25E+00 + 1.38E+01 1.84E+01 I-131 -4.64E+00 + 1.17E+01 1.70E+01 I-131 -1.22E+00 + 1.31E+01 1.86E+01 CS-134 -3.86E+00 + 1.05E+01 1.76E+01 CS-134 -4.84E+00 + 1.13E+01 1.88E+01 CS-137 -3.87E+00 + 7.77E+00 1.09E+01 CS-137 3.43E+00 + 7.53E+00 1.02E+01 BALA140 6.50E-01 + 1.13E+01 1.49E+01 BALA140 2.91E+00 + 1.01E+01 1.28E+01 BI-214 + 6.33E+01 + 1.80E+01 2.18E+01 BI-214 + 6.08E+01 + 1.99E+01 2.48E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 3 of 5

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING SAMPLES Results in pCi/liter Station MW-12 collected 8/6/2019 Station MW-MW-5 collected 10/15/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 4.88E+01 + 8.98E+01 1.22E+02 K-40 6.01E+01 + 8.64E+01 1.17E+02 MN-54 -1.10E+00 + 7.24E+00 9.73E+00 MN-54 1.59E+00 + 6.60E+00 8.86E+00 CO-58 -3.33E+00 + 8.20E+00 1.08E+01 CO-58 -3.10E+00 + 7.58E+00 1.00E+01 FE-59 1.67E+00 + 1.77E+01 2.30E+01 FE-59 -3.80E+00 + 1.82E+01 2.34E+01 CO-60 9.41E-01 + 6.33E+00 8.25E+00 CO-60 2.62E+00 + 6.95E+00 8.86E+00 ZN-65 -1.13E+01 + 1.95E+01 3.24E+01 ZN-65 -6.11E+00 + 1.69E+01 2.85E+01 ZRNB-95 5.28E+00 + 1.28E+01 1.70E+01 ZRNB-95 -7.38E+00 + 1.48E+01 1.95E+01 I-131 2.62E+00 + 1.42E+01 2.01E+01 I-131 -5.85E+00 + 1.44E+01 2.02E+01 CS-134 -4.93E+00 + 1.09E+01 1.82E+01 CS-134 -4.58E+00 + 9.92E+00 1.65E+01 CS-137 0.00E+00 + 5.41E-05 1.04E+01 CS-137 3.81E+00 + 6.73E+00 9.13E+00 BALA140 -7.28E+00 + 1.36E+01 1.68E+01 BALA140 3.58E-01 + 1.04E+01 1.34E+01 BI-214 + 4.33E+01 + 2.06E+01 2.58E+01 BI-214 + 3.59E+01 + 1.63E+01 2.20E+01 Station MW-13 collected 7/30/2019 Station MW-MW-6 collected 10/15/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 3.57E+01 + 8.50E+01 1.17E+02 K-40 3.86E+01 + 8.72E+01 1.19E+02 MN-54 2.49E+00 + 7.29E+00 9.69E+00 MN-54 2.61E-01 + 7.47E+00 1.01E+01 CO-58 -1.81E+00 + 7.77E+00 1.04E+01 CO-58 2.71E+00 + 7.46E+00 9.90E+00 FE-59 3.13E+00 + 1.79E+01 2.31E+01 FE-59 2.27E-01 + 1.90E+01 2.46E+01 CO-60 2.47E-01 + 7.01E+00 9.14E+00 CO-60 1.63E+00 + 7.96E+00 1.02E+01 ZN-65 -8.72E+00 + 1.86E+01 3.11E+01 ZN-65 -1.08E+01 + 2.38E+01 3.98E+01 ZRNB-95 3.79E+00 + 1.14E+01 1.53E+01 ZRNB-95 -1.48E+00 + 1.46E+01 1.95E+01 I-131 -7.56E+00 + 1.35E+01 1.88E+01 I-131 -2.88E+00 + 8.90E+00 1.24E+01 CS-134 -4.81E+00 + 1.17E+01 1.95E+01 CS-134 4.40E+00 + 1.57E+01 2.61E+01 CS-137 4.22E+00 + 7.30E+00 9.87E+00 CS-137 -6.10E+00 + 9.85E+00 1.32E+01 BALA140 -3.92E+00 + 1.26E+01 1.57E+01 BALA140 -6.71E-01 + 1.03E+01 1.29E+01 BI-214 + 7.50E+01 + 2.04E+01 2.42E+01 BI-214 + 2.81E+02 + 2.91E+01 2.69E+01 Station MW-14 collected 7/30/2019 Station MW-MW-9 collected 10/23/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 5.27E+01 + 8.60E+01 1.17E+02 K-40 4.93E+01 + 8.20E+01 1.18E+02 MN-54 -9.48E-01 + 7.34E+00 9.87E+00 MN-54 -4.34E+00 + 7.65E+00 1.04E+01 CO-58 1.60E-01 + 7.83E+00 1.06E+01 CO-58 -2.43E+00 + 7.02E+00 9.66E+00 FE-59 -3.22E+00 + 1.84E+01 2.38E+01 FE-59 1.66E+01 + 1.51E+01 1.86E+01 CO-60 1.78E+00 + 6.65E+00 8.56E+00 CO-60 1.09E+00 + 7.02E+00 9.59E+00 ZN-65 -1.06E+01 + 1.82E+01 3.03E+01 ZN-65 -6.57E+00 + 2.00E+01 3.38E+01 ZRNB-95 -5.99E+00 + 1.38E+01 1.83E+01 ZRNB-95 -1.41E+00 + 1.21E+01 1.68E+01 I-131 -1.79E+00 + 1.48E+01 2.10E+01 I-131 -1.82E+00 + 1.03E+01 1.50E+01 CS-134 2.84E+00 + 1.04E+01 1.75E+01 CS-134 -4.16E+00 + 1.24E+01 2.07E+01 CS-137 5.72E-01 + 7.47E+00 1.04E+01 CS-137 -3.67E+00 + 7.91E+00 1.11E+01 BALA140 -3.79E-01 + 1.21E+01 1.55E+01 BALA140 -8.30E+00 + 1.25E+01 1.56E+01 BI-214 + 4.56E+01 + 2.25E+01 2.74E+01 BI-214 + 1.25E+02 + 2.09E+01 2.27E+01 Station MW-MW-3 collected 10/15/2019 Station MW-MW-10 collected 10/23/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 2.41E+02 + 7.78E+01 7.02E+01 K-40 1.24E+02 + 9.19E+01 1.58E+02 MN-54 3.01E-01 + 7.46E+00 1.01E+01 MN-54 -1.35E+00 + 7.40E+00 9.92E+00 CO-58 -8.96E-01 + 7.32E+00 9.85E+00 CO-58 -9.28E-01 + 7.38E+00 9.92E+00 FE-59 -8.61E+00 + 2.06E+01 2.60E+01 FE-59 -1.22E+00 + 1.73E+01 2.25E+01 CO-60 3.66E+00 + 6.54E+00 8.25E+00 CO-60 -1.53E+00 + 6.37E+00 8.24E+00 ZN-65 1.60E+00 + 1.94E+01 3.30E+01 ZN-65 -8.85E+00 + 1.86E+01 3.12E+01 ZRNB-95 6.68E+00 + 1.08E+01 1.43E+01 ZRNB-95 -2.64E+00 + 1.30E+01 1.74E+01 I-131 -1.15E+00 + 1.25E+01 1.76E+01 I-131 -5.18E-01 + 1.05E+01 1.50E+01 CS-134 -5.26E+00 + 1.35E+01 2.24E+01 CS-134 -4.49E+00 + 1.13E+01 1.89E+01 CS-137 -5.58E+00 + 9.47E+00 1.27E+01 CS-137 2.29E+00 + 8.85E+00 1.21E+01 BALA140 -5.14E+00 + 1.27E+01 1.57E+01 BALA140 -1.31E+00 + 1.27E+01 1.59E+01 BI-214 + 1.42E+02 + 2.30E+01 2.45E+01 BI-214 + 7.81E+01 + 2.10E+01 2.47E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 4 of 5

TABLE B-10.1 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING SAMPLES Results in pCi/liter Station MW-MW-11 collected 10/22/2019 Station MW-MW-13 collected 10/15/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.84E+01 + 8.39E+01 1.13E+02 K-40 3.13E+01 + 8.68E+01 1.19E+02 MN-54 -2.80E+00 + 7.80E+00 1.03E+01 MN-54 4.82E+00 + 6.64E+00 8.67E+00 CO-58 4.57E+00 + 6.56E+00 8.58E+00 CO-58 6.32E+00 + 5.82E+00 7.43E+00 FE-59 8.77E-01 + 1.52E+01 2.01E+01 FE-59 -3.70E+00 + 1.77E+01 2.28E+01 CO-60 -2.92E+00 + 8.83E+00 1.12E+01 CO-60 1.88E+00 + 6.89E+00 8.85E+00 ZN-65 5.39E+00 + 1.78E+01 3.00E+01 ZN-65 -9.91E+00 + 1.94E+01 3.24E+01 ZRNB-95 -7.11E+00 + 1.42E+01 1.87E+01 ZRNB-95 -3.89E+00 + 1.46E+01 1.94E+01 I-131 -5.11E-01 + 1.22E+01 1.73E+01 I-131 4.71E+00 + 1.10E+01 1.54E+01 CS-134 1.34E+00 + 1.14E+01 1.92E+01 CS-134 -4.77E+00 + 1.18E+01 1.97E+01 CS-137 -4.76E+00 + 9.08E+00 1.23E+01 CS-137 -1.33E+00 + 8.86E+00 1.22E+01 BALA140 5.15E-01 + 1.10E+01 1.41E+01 BALA140 -1.54E+00 + 1.05E+01 1.33E+01 BI-214 + 1.03E+02 + 2.06E+01 2.36E+01 BI-214 + 8.09E+01 + 2.22E+01 2.59E+01 Station MW-MW-12 collected 10/22/2019 Station MW-14 collected 10/15/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 7.00E+01 + 9.78E+01 1.34E+02 K-40 + 2.00E+02 + 8.19E+01 1.06E+02 MN-54 2.19E+00 + 6.20E+00 8.55E+00 MN-54 2.57E+00 + 7.18E+00 9.84E+00 CO-58 3.96E+00 + 6.61E+00 8.98E+00 CO-58 1.21E+00 + 5.66E+00 7.93E+00 FE-59 7.25E+00 + 1.63E+01 2.13E+01 FE-59 1.19E+00 + 1.66E+01 2.23E+01 CO-60 -2.33E+00 + 6.06E+00 8.66E+00 CO-60 -2.11E+00 + 6.82E+00 9.59E+00 ZN-65 -3.62E+00 + 1.62E+01 2.77E+01 ZN-65 -3.65E+00 + 1.80E+01 3.07E+01 ZRNB-95 4.01E+00 + 1.09E+01 1.51E+01 ZRNB-95 2.50E+00 + 1.23E+01 1.70E+01 I-131 1.11E+00 + 1.19E+01 1.75E+01 I-131 -4.67E-01 + 1.11E+01 1.63E+01 CS-134 -3.96E+00 + 1.10E+01 1.84E+01 CS-134 8.58E-01 + 1.15E+01 1.94E+01 CS-137 2.92E+00 + 6.78E+00 9.57E+00 CS-137 -3.24E+00 + 7.73E+00 1.09E+01 BALA140 -9.86E-01 + 1.15E+01 1.51E+01 BALA140 -6.37E+00 + 1.25E+01 1.58E+01 BI-214 + 8.27E+01 + 1.99E+01 2.21E+01 BI-214 + 1.11E+02 + 2.11E+01 2.22E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 5 of 5

Table B-10.2 GAMMA SPECTROMETRY RESULTS OF GROUNDWATER MONITORING SAMPLES -

SUMMARY

Results in pCi/liter Average Activity Activity Average Number of Number of Nuclide Activity Low High MDA Samples Positive IDs K-40 7.24E+01 3.66E+00 2.41E+02 1.19E+02 36 3 MN-54 2.08E-01 -5.04E+00 4.82E+00 9.36E+00 36 0 CO-58 1.14E-01 -5.14E+00 6.94E+00 9.13E+00 36 0 FE-59 8.33E-01 -1.11E+01 1.66E+01 2.21E+01 36 0 CO-60 4.36E-01 -5.50E+00 6.53E+00 9.12E+00 36 0 ZN-65 -2.35E+00 -1.13E+01 1.23E+01 2.52E+01 36 0 ZRNB-95 -3.56E-01 -1.07E+01 8.52E+00 1.67E+01 36 0 I-131 -1.27E+00 -1.58E+01 5.96E+00 1.69E+01 36 0 CS-134 -1.26E+00 -5.26E+00 4.40E+00 1.50E+01 36 0 CS-137 -6.04E-01 -6.10E+00 6.64E+00 1.03E+01 36 0 BALA140 -4.14E-01 -9.11E+00 1.08E+01 1.47E+01 36 0 BI-214 1.35E+02 2.10E+01 6.48E+02 2.43E+01 36 35 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 07/30/19 + 6.46E+02 + 1.07E+02 10/15/19 + 5.43E+02 + 1.03E+02 01/29/19 + 7.63E+02 + 1.11E+02 04/30/19 + 7.33E+02 + 1.05E+02 MW-5 07/30/19 + 1.19E+04 + 2.69E+02 10/15/19 + 1.15E+04 + 2.66E+02 01/29/19 + 1.26E+04 + 2.78E+02 04/30/19 + 1.20E+04 + 2.68E+02 MW-6 07/30/19 + 5.01E+03 + 1.86E+02 10/15/19 + 5.12E+03 + 1.88E+02 01/29/19 + 4.82E+03 + 1.85E+02 04/30/19 + 5.04E+03 + 1.84E+02 MW-9 01/30/19 1.59E+02 + 9.52E+01 05/07/19 + 3.53E+02 + 9.86E+01 08/06/19 2.91E+02 + 9.57E+01 10/23/19 + 3.30E+02 + 9.73E+01 MW-10 01/30/19 2.39E+02 + 9.73E+01 05/07/19 + 3.95E+02 + 9.85E+01 08/06/19 + 4.30E+02 + 9.97E+01 10/23/19 2.79E+02 + 9.52E+01 MW-11 01/30/19 + 1.05E+03 + 1.18E+02 05/07/19 + 1.09E+03 + 1.17E+02 08/06/19 + 1.26E+03 + 1.20E+02 10/23/19 + 1.05E+03 + 1.14E+02 MW-12 01/30/19 + 3.70E+02 + 1.01E+02 05/07/19 + 5.44E+02 + 1.03E+02 08/06/19 + 4.75E+02 + 1.00E+02 10/23/19 + 5.15E+02 + 1.01E+02 MW-13 07/30/19 + 1.02E+04 + 2.49E+02 10/15/19 + 9.99E+03 + 2.50E+02 01/29/19 + 9.81E+03 + 2.48E+02 04/30/19 + 9.98E+03 + 2.45E+02 MW-14 07/30/19 2.03E+02 + 9.51E+01 10/15/19 2.15E+02 + 9.51E+01 01/29/19 1.72E+02 + 9.53E+01 04/30/19 2.71E+02 + 9.24E+01 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 EVP-1A collected 4/25/2019 Location EVP-1B collected 4/25/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 + 1.48E+02 + 7.37E+01 9.59E+01 K-40 5.63E+01 + 8.04E+01 1.15E+02 CR-51 -1.54E+00 + 4.95E+01 7.08E+01 CR-51 3.27E+01 + 4.18E+01 5.97E+01 MN-54 4.66E+00 + 5.49E+00 6.94E+00 MN-54 -1.90E+00 + 6.38E+00 8.56E+00 CO-58 2.10E+00 + 5.20E+00 6.80E+00 CO-58 4.90E+00 + 4.71E+00 6.01E+00 FE-59 6.05E+00 + 1.42E+01 1.77E+01 FE-59 -2.24E+00 + 1.59E+01 2.07E+01 CO-60 1.61E+00 + 6.94E+00 8.52E+00 CO-60 3.46E+00 + 4.76E+00 5.99E+00 ZN-65 5.73E+00 + 9.91E+00 1.23E+01 ZN-65 -6.90E+00 + 1.48E+01 1.92E+01 ZRNB-95 8.89E-01 + 1.14E+01 1.51E+01 ZRNB-95 2.09E+00 + 9.87E+00 1.38E+01 I-131 -1.15E+00 + 8.12E+00 1.16E+01 I-131 2.27E+00 + 6.92E+00 1.01E+01 CS-134 1.86E+00 + 6.69E+00 8.89E+00 CS-134 1.94E+00 + 5.54E+00 7.62E+00 CS-137 5.91E+00 + 6.13E+00 7.89E+00 CS-137 -4.24E+00 + 7.69E+00 1.04E+01 BALA140 -4.12E+00 + 1.07E+01 1.27E+01 BALA140 0.00E+00 + 7.82E-01 1.42E+01 BI-214 1.00E+01 + 1.19E+01 2.31E+01 BI-214 1.16E+01 + 1.55E+01 2.17E+01 Location EVP 2 collected 4/25/2019 Location EVP 3 collected 4/25/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA K-40 8.25E+01 + 7.24E+01 1.01E+02 K-40 6.78E+01 + 8.74E+01 1.21E+02 CR-51 3.77E+01 + 5.20E+01 7.19E+01 CR-51 -1.03E+01 + 4.45E+01 6.54E+01 MN-54 1.66E+00 + 6.34E+00 8.29E+00 MN-54 -2.00E+00 + 6.83E+00 9.15E+00 CO-58 2.55E-01 + 5.86E+00 7.79E+00 CO-58 0.00E+00 + 3.72E+00 8.30E+00 FE-59 -1.99E+00 + 1.65E+01 2.10E+01 FE-59 6.10E+00 + 1.24E+01 1.59E+01 CO-60 1.36E+00 + 6.92E+00 8.52E+00 CO-60 3.33E+00 + 5.22E+00 6.61E+00 ZN-65 5.88E+00 + 1.13E+01 1.40E+01 ZN-65 6.51E+00 + 1.01E+01 1.31E+01 ZRNB-95 1.05E+01 + 1.06E+01 1.32E+01 ZRNB-95 8.72E-01 + 9.53E+00 1.35E+01 I-131 -1.66E+00 + 7.49E+00 1.07E+01 I-131 -5.82E+00 + 8.70E+00 1.25E+01 CS-134 6.82E+00 + 5.52E+00 6.98E+00 CS-134 -5.66E-01 + 6.33E+00 8.77E+00 CS-137 -2.60E+00 + 7.05E+00 9.38E+00 CS-137 -3.75E+00 + 6.60E+00 8.97E+00 BALA140 -7.25E-01 + 1.00E+01 1.22E+01 BALA140 2.24E+00 + 5.48E+00 7.00E+00 BI-214 6.40E+00 + 1.65E+01 2.32E+01 BI-214 1.35E+01 + 1.51E+01 2.10E+01 Location EVP 4 collected 4/25/2019 Nuclide RQ Activity Error MDA K-40 8.94E+01 + 6.91E+01 9.65E+01 CR-51 7.89E+00 + 5.11E+01 7.26E+01 MN-54 -6.26E-01 + 6.45E+00 8.50E+00 CO-58 3.53E-01 + 6.44E+00 8.51E+00 FE-59 -8.46E+00 + 1.87E+01 2.31E+01 CO-60 1.90E+00 + 6.58E+00 8.08E+00 ZN-65 -6.93E+00 + 1.48E+01 1.82E+01 ZRNB-95 5.56E+00 + 1.03E+01 1.33E+01 I-131 -3.74E+00 + 9.42E+00 1.32E+01 CS-134 0.00E+00 + 1.98E+00 9.48E+00 CS-137 -1.59E+00 + 7.26E+00 9.72E+00 BALA140 -2.84E+00 + 9.97E+00 1.20E+01 BI-214 + 4.34E+01 + 1.95E+01 2.44E+01 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 1

TABLE B-13.1 GAMMA SPECTROMETRY RESULTS OF EVAPORATION POND SEDIMENT Results in pCi/kilogram dry material Location & Date EVP-3 9/9/2019 Location & Date EVP-4 9/9/2019 Nuclide RQ Activity Error MDA Nuclide RQ Activity Error MDA BE-7 + 1.75E+03 + 5.29E+02 5.60E+02 BE-7 + 1.09E+04 + 1.53E+03 1.09E+03 K-40 + 1.49E+04 + 1.20E+03 4.05E+02 K-40 + 4.14E+03 + 9.36E+02 7.56E+02 CR-51 5.51E+02 + 8.70E+02 1.26E+03 CR-51 4.09E+02 + 1.55E+03 2.31E+03 MN-54 -2.90E+01 + 4.82E+01 6.56E+01 MN-54 9.92E+00 + 2.07E+01 3.91E+01 CO-58 -2.42E+00 + 5.34E+01 7.69E+01 CO-58 2.54E+01 + 6.59E+01 9.56E+01 FE-59 1.98E+01 + 2.17E+02 2.95E+02 FE-59 -3.32E+01 + 2.91E+02 4.13E+02 CO-60 8.48E+00 + 3.08E+01 4.33E+01 CO-60 -1.90E+01 + 5.13E+01 8.92E+01 ZN-65 -5.54E+01 + 1.41E+02 2.39E+02 ZN-65 1.21E+01 + 9.97E+01 1.49E+02 ZRNB-95 4.40E+00 + 1.23E+02 1.75E+02 ZRNB-95 6.46E+01 + 1.57E+02 2.22E+02 CS-134 -1.57E+01 + 6.68E+01 1.13E+02 CS-134 8.29E+00 + 6.17E+01 9.09E+01 CS-137 2.17E+00 + 4.93E+01 6.92E+01 CS-137 2.01E+01 + 7.05E+01 9.97E+01 BALA140 -6.93E+00 + 3.59E+02 5.27E+02 BALA140 7.30E+02 + 4.63E+02 1.17E+03 BI-214 + 5.91E+02 + 1.03E+02 9.17E+01 BI-214 -9.33E+00 + 1.50E+02 2.28E+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 Collection Location Date RQ Activity Error MDA Evaporation Pond 1A 04/25/19 2.33E+00 + 8.05E-01 2.34E+00 Evaporation Pond 1B 04/25/19 9.74E-01 + 6.57E-01 2.18E+00 Evaporation Pond 2 04/25/19 -8.13E-01 + 6.62E-01 2.22E+00 Evaporation Pond 3 04/25/19 5.29E-01 + 6.48E-01 2.24E+00 Evaporation Pond 4 04/25/19 4.56E-01 + 6.53E-01 2.27E+00 TABLE B-15.1 TRITIUM IN EVAPORATION POND WATER Results in pCi/liter, LLD is 300 pCi/liter Collection Location Date RQ Activity Error Evaporation Pond 1A 04/25/19 1.71E+02 + 9.28E+01 Evaporation Pond 1B 04/25/19 1.32E+02 + 9.29E+01 Evaporation Pond 2 04/25/19 1.55E+02 + 9.17E+01 Evaporation Pond 3 04/25/19 2.55E+02 + 9.71E+01 Evaporation Pond 4 04/25/19 + 1.51E+03 + 1.27E+02 RQ = Results Qualifier. If blank, result is less than detection limit. If "+", result is above detection limit. Page 1 of 1

TABLE B-16.1 TRITIUM IN SNOW Results in pCi/liter, LLD is 300 pCi/liter Distance from Collection Location Sector CGS, miles Date RQ Activity Error ST-101B ENE 0.22 03/13/19 1.49E+02 + 9.18E+01 ST-119 S 0.31 03/13/19 2.92E+02 + 9.67E+01 ST-155 NW 0.30 03/13/19 1.91E+02 + 9.51E+01 ST-76 ESE 0.42 03/13/19 1.99E+02 + 9.47E+01 ST-81 SW 0.74 03/13/19 2.08E+02 + 9.40E+01 ST-88 WNW 0.17 03/13/19 2.76E+02 + 9.77E+01 TABLE B-17.1 CARBON 14 IN APPLES Results in pCi/gram wet mass Distance from CGS, Sector from Collection Location miles CGS Sample Type Date RQ Activity Error MDA St-37 4.3 ESE Ind 8/27/2019 3.40E-01 + 5.40E-01 9.60E-01 St-37 4.3 ESE Ind 8/27/2019 1.30E-01 + 5.40E-01 9.60E-01 St-37 4.3 ESE Ind 8/27/2019 2.70E-01 + 5.20E-01 9.60E-01 Kennewick 23.00 SSE Cntl 9/13/2019 8.40E-01 + 5.70E-01 9.60E-01 Basin City 12.00 NE Ind 9/13/2019 9.00E-02 + 5.50E-01 9.60E-01 Mattawa 34.5 WNW Cntl 9/13/2019 3.80E-01 + 5.30E-01 9.60E-01 Basin City 12 NE Ind 9/13/2019 2.60E-01 + 5.30E-01 9.60E-01 The first three sample results were a blind triplicate analysis of the same sample Ind = Indicator location. Cntl = Control location.

RQ=Results Qualifier. If blank, results is leass than dectection limit. If "+", result is above the detection limit. Page 1 of 1