ML20118D073

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2019 Annual Radiological Environmental Operating Report
ML20118D073
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 04/26/2020
From: Benham R
Wolf Creek
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RA 20-0042
Download: ML20118D073 (152)


Text

Ron Benham Manager Nuclear and Regulatory Affairs April 26, 2020 RA 20-0042 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Docket No. 50-482: 2019 Annual Radiological Environmental Operating Report To Whom It May Concern:

The purpose of this letter is to submit the enclosed Annual Radiological Environmental Operating Report, which is being submitted pursuant to Wolf Creek Generating Station (WCGS) Technical Specification 5.6.2. This report covers radiological environmental monitoring for WCGS for the period of January 1, 2019, through December 31, 2019.

This letter contains no commitments. If you have any questions concerning this matter, please contact me at (620) 364-4204.

Sincerely, Ron Benham RDB/rlt Enclosure cc: S. A. Morris (NRC), w/e N. OKeefe (NRC), w/e B. K. Singal (NRC), w/e Senior Resident Inspector (NRC), w/e P.O. Box 411 l Burlington, KS 66839 l 620-364-8831

Enclosure to RA 20-0042 Wolf Creek Generating Station 2019 Annual Radiological Environmental Operating Report (151 pages including this page)

WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION 2019 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT March 26, 2020

TABLE OF CONTENTS List of Tables ii List of Figures ii List of Charts ii Executive Summary 1 Introduction 1 I. Program Description 1 II. Discussion of Results 4 III. Program Revisions/Changes 9 IV. Program Deviations 10 V. Interlaboratory Comparison Program 10 VI. Comparison to the Radioactive Effluent Release Program 10 Tables 12 Figures 21 Charts 26 Appendix A - Interlaboratory Comparison Program Results Appendix B - Summary Tables Appendix C - Individual Sample Results Air Particulate Filters and Radioiodine Canisters C-1 Quarterly Air Particulate - Gamma C-13 Surface Water C-19 Ground Water C-27 Drinking Water C-41 Quarterly Drinking Water - Tritium C-49 Shoreline Sediment C-51 Fish C-54 Food/Garden C-60 Food/Crops C-70 Bottom Sediment C-73 Aquatic Vegetation C-75 Terrestrial Vegetation C-78 Soil C-79 Meat C-80 Appendix D - Land Use Census Report i

LIST OF TABLES 1 Radiological Environmental Monitoring Program Description 12 2 Sample Location Identifiers, Distances (Miles) and Directions (Sectors) 17 3 OSL Dosimeter Results 20 LIST OF FIGURES 1 Airborne Pathway Sampling Locations 21 2 Direct Radiation Pathway Sampling Locations 22 3 Waterborne Pathway Sampling Locations 23 4 Ingestion Pathway Sampling Locations 24 5 Distant Sampling Locations 25 LIST OF CHARTS 1 Airborne Gross Beta Weekly Results 26 2 Historical Airborne Smoothed Indicator and Control Gross Beta 27 3 OSL Dosimeters - Indicator and Control Locations 28 4 Historical TLD Nearsite Locations and Control Locations 29 5 Coffey County Lake Surface Water Tritium Data 30 6 Drinking Water Gross Beta (5 years) 31 7 Detected Cs-137 Activity in Bottom Sediment 32 ii

EXECUTIVE

SUMMARY

Plant-related activation, corrosion, or fission products were not detected during 2019 in air particulate filters, radioiodine canisters, ground water, drinking water, broadleaf vegetation, shoreline sediment, crops, bottom sediment, aquatic vegetation, terrestrial vegetation or soil samples. Activation, corrosion or fission products attributable to plant operation were detected during 2019 in surface water, fish, and deer samples.

Nuclides detected in Radiological Environmental Monitoring Program (REMP) samples were below applicable Nuclear Regulatory Commission (NRC) reporting levels.

Based upon the REMP results, it was concluded station operations had no significant radiological impact on the health and safety of the public or the environment.

INTRODUCTION The 2019 Annual Radiological Environmental Operating Report for Wolf Creek Generating Station (WCGS) covers the period from January 1 through December 31, 2019. WCGS is located in Coffey County, Kansas, approximately five miles northeast of Burlington, Kansas.

Fuel loading commenced at WCGS on March 12, 1985. The operational phase of the REMP began with initial criticality on May 22, 1985, and the first detectable quantities of radioactivity were reported in plant effluents in June 1985.

This report contains a description of the REMP conducted by Wolf Creek Nuclear Operating Corporation (WCNOC), a discussion of monitoring program results, the revisions or changes to the program, program deviations, the Interlaboratory Comparison Program and a comparison to the Radioactive Effluent Release Program. The Interlaboratory Comparison Program results, a summary of results in the NRC Branch Technical Position specified format, the individual sample results, and the Land Use Census Report are included as appendices.

I. PROGRAM DESCRIPTION Radiological environmental monitoring samples were collected according to the schedule in WCGS procedure AP 07B-004, Offsite Dose Calculation Manual (Radiological Environmental Monitoring Program). Radiological environmental monitoring program samples were collected by the WCGS Environmental Management group and were analyzed by Environmental, Inc.

Landauer, Inc. processed the environmental optically stimulated luminescence (OSL) dosimeters. Table 1 identifies the exposure pathway/sample type, number of samples and sample locations, sample collection frequency, and the type and frequency of analysis. Table 2 lists the sample location identifiers, distances and directions from the plant. Samples in addition to those required by AP 07B-004 were also obtained and analyzed.

The following is a description of the sampling and analysis program by individual pathways.

A. Airborne Pathway Low volume air sampling pumps with digital flow meters continuously sampled air through 47 mm glass fiber particulate filters and radioiodine canisters, respectively. The air particulate filters and radioiodine canisters were collected weekly. Gross beta analysis was performed weekly on the air particulate filters. Gamma isotopic analysis was also performed quarterly on 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 1 of 32

the air particulate filters. Radioiodine canisters were analyzed weekly for I-131.

Air samples were collected from six locations. The indicator locations sampled included 2, 18, 32, 37 and 49. A control location near the intersection of 20th Road and Yearling Road (location

53) was also sampled. Indicator sample locations are shown in Figure 1 and the control sample location is shown in Figure 5.

B. Direct Radiation Pathway Optically stimulated luminescence (OSL) dosimeters were used continuously at 42 locations during the sample year to measure direct radiation. The OSLs were typically positioned roughly 3 to 4 feet above the ground in plastic thermostat boxes. Three OSLs were placed at each designated location. The OSLs were changed out quarterly and analyzed quarterly for gamma dose. Transit dose was measured and subtracted from the ambient dose. Indicator OSL sample locations are illustrated in Figure 2 and control sample locations are shown in Figure 5.

Control sample locations were 39 (Beto Junction) and 53 (near the intersection of 20th Road and Yearling Road).

C. Waterborne Pathway Gamma isotopic analysis was performed on the water samples. In addition to gamma isotopic analysis, analysis for I-131 was performed monthly on drinking water and quarterly on ground water samples. Gross beta analysis was performed monthly on drinking water samples. Tritium analysis was performed monthly for surface water and quarterly for drinking water. Tritium analysis was also performed quarterly on ground water samples. Four surface water samples from the Coffey County Lake Spillway (SP) location and four surface water samples from the John Redmond Reservoir (JRR) location were also analyzed for Fe-55. The waterborne pathway sample locations are shown in Figures 3 and 5.

Monthly grab samples of surface water were collected from the John Redmond Reservoir (JRR) control location and from the Coffey County Lake Spillway (SP) indicator location.

Quarterly grab samples of ground water were collected from seven wells. Six locations (C-10, C-49, F-1, G-2, J-1 and J-2) located hydrologically down gradient from the site were used as indicator sample locations. Location B-12 located hydrologically up gradient from the site was used as a control location.

Drinking water was sampled at the water treatment facilities in the towns of Iola (indicator sample location IO-DW) and Burlington (control sample location BW-15). The Iola facility is located downstream of the Neosho River-Wolf Creek confluence and the Burlington facility is located upstream of the Neosho River-Wolf Creek confluence. Composite samples were obtained monthly from automatic samplers at each location. The automatic drinking water samplers collected approximately 27 milliliters of water every two hours.

Shoreline sediments were sampled semiannually. Gamma isotopic analyses were performed on the shoreline sediment samples. Shoreline sediment sample locations were the Coffey County Lake discharge cove (DC) indicator location and the John Redmond Reservoir (JRR) control location.

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D. Ingestion Pathway Milk was not collected during the sample year. The Land Use Census did not identify any locations producing milk for human consumption within five miles of the plant.

Fish were sampled semiannually from the indicator sample location Coffey County Lake (CCL) and from the tail waters of John Redmond Reservoir (JRR) control sample location. These sample locations are identified in Figure 4. Gamma isotopic analyses were performed on the boneless meat portions of the fish. Several species of game fish and rough fish were sampled.

Fish were also analyzed for tritium.

Broadleaf vegetation samples were collected monthly when available during the growing season. Indicator (A-3, B-1, H-2 and Q-6) location gardens (Figure 4) and a control (D-2) location garden (Figure 5) were sampled. Gamma isotopic analyses were performed on these samples.

Irrigated crop samples were obtained from indicator location (NR-D1) and non-irrigated samples from indicator location (NR-D2) downstream of the confluence of Wolf Creek and the Neosho River. Irrigated crops were also sampled from control location (NR-U1). Gamma isotopic analysis was performed on each sample. Crop sample locations are identified on Figure 5.

E. Additional Samples Collected (not required by AP 07B-004)

Bottom sediment samples were collected semiannually from indicator sample locations at the Discharge Cove (DC), and the control sample location at John Redmond Reservoir (JRR).

Gamma isotopic analyses were performed on the bottom sediment samples. Two samples collected from indicator location (DC) were also analyzed for Fe-55. No samples were analyzed for Ni-63, Sr-89 and Sr-90 activity (Hard to Detect Metals). One shoreline sediment sample was collected from indicator sample location at Stringtown Cemetery (SC) as part of a cooperative sampling effort with the Kansas Department of Health and Environment (KDHE). The sample locations are identified on Figure 3.

Aquatic vegetation was collected from indicator locations at the Makeup Discharge Structure (MUDS), Environmental Education Area (EEA) and Stringtown Cemetery (SC). Gamma isotopic analyses were performed on the aquatic vegetation samples. These samples were collected as part of a cooperative sampling effort with the KDHE. The sample locations are identified on Figure 3.

Terrestrial vegetation (grass) was sampled from the Environmental Education Area (EEA) and the Makeup Discharge Structure (MUDS) indicator sample locations. Gamma isotopic analysis was performed on the grass samples. These samples were collected as part of a cooperative sampling effort with the KDHE. The sample locations are identified on Figure 4.

Soil was sampled from the Environmental Education Area (EEA) and Makeup Discharge Structure (MUDS). Gamma isotopic analysis was performed on the soil samples. These samples were collected as part of a cooperative sampling effort with the KDHE. The sample locations are identified on Figure 4.

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Turkey was sampled from indicator sample location J4.0. Gamma isotopic analysis and tritium analysis was performed on the turkey sample. This sample was collected as part of a cooperative sampling effort with the KDHE. The sample location is identified on Figure 4.

Deer was sampled from indicator sample location J3.5. Gamma isotopic analysis and tritium analysis was performed on the turkey sample. This sample was collected as part of a cooperative sampling effort with the KDHE. The sample location is identified on Figure 4.

II. DISCUSSION OF RESULTS Analysis results for pathways are summarized in Appendix B using the format described in Radiological Assessment Branch Technical Position, Revision 1, November 1979 (NRC Generic Letter 79-065). Results for individual samples are listed in Appendix C.

A. Airborne Pathway Chart 1 graphically illustrates weekly gross beta results for the sample year. Chart 2 represents the gross beta historical airborne smoothed averages of indicator sample locations and control sample locations. Charts 1 and 2 demonstrate how closely the indicator and control sample locations tracked together. Chart 2 reveals a seasonal cyclic trend; the gross beta values peak in the winter months (December or January) and decrease to a low point in the spring months (May or June). This trend is expected and is attributed to seasonal meteorological changes, i.e., changes in prevailing winds and precipitation.

The gross beta results of 2019 were compared to pre-operational monitoring results of 1983 and 1984. The weekly gross beta analyses range for 1983 and 1984 was 0.0064 to 0.084 pCi/m3.

The 2019 weekly gross beta analyses range for indicator locations was 0.007 to 0.048 pCi/m3.

The 2019 weekly gross beta analyses range was within the 1983 and 1984 pre-operational range. Additionally, the annual mean for indicator locations for 2019 (0.023 pCi/m3) was lower than the annual mean for 1983 (0.032 pCi/m3).

The gross beta results for the indicator locations were also compared to the control location.

The annual mean for indicator locations for 2019 (0.023 pCi/m3) was the same as the annual mean of the control location (0.023 pCi/m3). The indicator location with the highest gross beta annual mean was location 32, 37, and 49 (0.023 pCi/m3) and was the same as the annual mean of the control location (0.023 pCi/m3).

Naturally occurring Be-7 activity was detected, as was the case during pre-operational monitoring. In 1984, the range for Be-7 detected activity was 0.024 to 0.211 pCi/m3 for indicator locations and the annual mean for indicator locations was 0.069 pCi/m3. In 2019, the range for Be-7 detected activity was 0.070 to 0.121 pCi/m3 for indicator locations and the annual mean for indicator locations was 0.090 pCi/m3. The control location annual mean for Be-7 detected activity (0.092 pCi/m3) was slightly higher than the annual mean of the indicator locations (0.090 pCi/m3). The indicator location with the highest annual mean of detected Be-7 activity was location 2 (0.094 pCi/ m3).

I-131 activity was not detected in the weekly analysis of radioiodine canisters at any location.

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The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2019 in air particulate filters and radioiodine canisters. No unusual trends were noted.

B. Direct Radiation Pathway Quarterly OSL dosimeter results for each location are shown in Table 3. Measured values have been converted to a standardized 90-day quarter.

The annual mean of indicator sample locations in 2019 was 18.7 mR per standardized 90-day quarter. The annual mean of the control sample locations in 2019 was 17.1 mR per standardized 90-day quarter.

For pre-operational comparison, in 1981, the annual mean of indicator sample locations was 18.9 mR per standardized 90-day quarter and the annual mean for the control sample locations was 17.1 mR per standardized 90-day quarter. It should be noted WCGS changed from thermoluminescence dosimeters (TLD) to optically stimulated luminescence (OSL) dosimeters in 2008.

The indicator sample location with the highest annual mean was location 13 (18.7 mR per standardized 90-day quarter) which is slightly higher than the annual mean of the control sample locations (17.1 mR per standardized 90-day quarter).

Based upon Condition Report 00027489, improvements were made in measuring and subtracting transit dose in 2010. As expected, the OSL results increased during 2010 based on how transit dosimeters are handled. Chart 3 visibly displays the increase of the OSL results since 2010. Chart 3 also displays how closely the indicator and control location OSL dosimeter results are for 2018. Condition Report 00128355 was written to reduce data elimination based on standard deviation starting in Quarter 3 of 2018. In 2019 no change in trend was noted due to this change.

Chart 4 displays the TLD nearsite sample locations (1, 2, 7-9, 11-14, 18, 26, 27, 29, 30, 37 and

38) and the control sample locations (locations 39 and 48) for the preoperational years through 2007.

C. Waterborne Pathway (1) Surface Water Tritium, attributable to WCGS operation, was detected in surface water samples collected from the Coffey County Lake spillway (SP) indicator sample location. The annual mean for detected tritium activity at the SP location was 10,450 pCi/L and the range was 8,867 to 12,331 pCi/L.

The detected tritium activity was below the 30,000 pCi/L AP 07B-004 reporting level. Chart 5 illustrates the yearly averages of surface water tritium data for the SP location. Chart 5 indicates the average tritium concentration of the SP location has from last year. Tritium activity was not detected in samples obtained from the John Redmond Reservoir (JRR) control sample location.

During pre-operational radiological environmental monitoring, measured radiological activity was not detected in surface water samples.

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The AP 07B-004 required lower limits of detection were met. Radionuclides were not detected by the gamma isotopic analyses or by Fe-55 analyses.

Tritium was the only activity detected during 2019 in surface water samples and no unusual trends were noted.

(2) Ground Water The AP 07B-004 required lower limits of detection were met for I-131, tritium and gamma isotopic analyses. Radioactivity was not detected in any ground water samples. No unusual trends were noted. Plant-related activation, corrosion or fission products were not detected during 2019 in ground water samples.

(3) Drinking Water Gross beta activity was detected in drinking water samples collected from the indicator sample location and in samples collected from the control sample location. The annual mean of the indicator sample location gross beta activity (2.24 pCi/L) was slightly lower when compared to the annual mean of the control sample location gross beta activity (2.33 pCi/L). The 2019 annual means of gross beta activity for both the indicator and control sample locations were lower than those of the pre-operational monitoring year of 1984. In 1984, the annual mean of the indicator sample location gross beta activity was 7.5 pCi/L and the annual mean of the control sample location gross beta activity was 6.4 pCi/L.

Chart 6 illustrates the drinking water gross beta results for the last five years and how closely the gross beta results compared for the indicator and control sample locations.

No tritium was detected in the indicator sample location during 2019. No release limits were exceeded, and results were well below required detection limits. No other radionuclides were detected by the gamma isotopic analyses of the indicator or control location samples.

The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2019 in drinking water samples and no unusual trends were noted.

(4) Shoreline Sediment Naturally occurring K-40 was detected in shoreline sediment samples collected from the DC (indicator sample location) and JRR (control sample location). K-40 was also detected during pre-operational shoreline sediment monitoring.

No other radionuclides were detected in the DC or JRR shoreline sediment samples during 2019. The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2019 in shoreline sediment samples and no unusual trends were noted.

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D. Ingestion Pathway (1) Milk Milk was not collected during the sample year since no indicator locations within five miles of the plant were identified during the 2019 Land Use Census.

(2) Fish Naturally occurring K-40 activity was detected in fish samples obtained from the Coffey County Lake (CCL) indicator sample location and in fish samples obtained from the JRR control sample location. K-40 activity was also detected during pre-operational fish monitoring.

Fish samples were also analyzed for tritium. Fish samples collected from Coffey County Lake had tritium activity detected annual mean (7,465 pCi/kg). The detected tritium activity was attributable to plant operation. An adult consuming 21 kilograms of fish, at the maximum measured tritium concentration (9,861 pCi/kg), would receive a committed effective dose equivalent of 0.013 mRem.

Tritium activity was not detected in the control location samples collected from JRR.

No other radionuclides were detected in fish samples during 2019. The AP 07B-004 required lower limits of detection were met and no unusual trends were noted.

(3) Broadleaf Vegetation Gamma analyses of broadleaf vegetation samples obtained from indicator and control sample locations detected naturally occurring Be-7 and K-40. Be-7 and K-40 activity were also detected pre-operationally.

No other radionuclides were detected in broadleaf vegetation samples collected during the year.

The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2019 in broadleaf vegetation samples and no unusual trends were noted.

(4) Crop Samples Gamma analysis detected naturally occurring K-40 activity to be present in the samples collected from the indicator sample locations and in the samples collected from the control sample location. K-40 activity was also detected during pre-operational crop monitoring. K-40 was the only activity detected in the crop samples.

The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2019 in crop samples and no unusual trends were noted.

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E. Additional Samples Collected (not required by AP 07B-004)

(1) Bottom Sediment Gamma analysis detected naturally occurring K-40 activity to be present in the samples collected from the indicator sample locations and in the samples collected from the control sample location. K-40 activity was also detected during pre-operational bottom sediment monitoring.

Cs-137 activity was detected in one of two samples obtained from indicator location DC (38.9 pCi/kg). Cs-137 was not detected in two samples obtained from control location JRR.

Cs-137 activity was detected in pre-operational samples. The Cs-137 activity detected in 2019 indicator sample location bottom sediment samples was within the pre-operational range.

Cs-137 activity detected in 1981 and 1982 was in the range of 79 to 953 pCi/kg. The decay corrected range of pre-operational Cs-137 activity detected is approximately 32 to 389 pCi/kg.

The detected Cs-137 activity in the samples collected from the indicator sample locations was likely due to fallout since the measured activity is within the decay corrected range of pre-operational Cs-137 detected activity.

Chart 7 plots the Cs-137 detected activity from the discharge cove indicator sample location and JRR control sample location bottom sediment samples. The detected Cs-137 activity measured from the discharge cove location reflects a decreasing trend. The Chart 7 trendline indicates Cs-137 activity detected at the JRR control location has also been decreasing. Chart 7 also displays that in recent years, the detected Cs-137 activity for the JRR and DC sample locations overlap.

Fe-55 activity was not detected in the two samples obtained from indicator sample locations.

No other radionuclides were detected in bottom sediment samples. Plant-related activation, corrosion, or fission products were not detected during 2019 in bottom sediment samples and no unusual trends were noted.

(2) Aquatic Vegetation Gamma analyses of aquatic vegetation samples obtained from indicator sample locations detected naturally occurring Be-7 and K-40. Be-7 and K-40 activity were also detected during pre-operational monitoring.

No other radionuclides were detected in aquatic vegetation samples. Plant-related activation, corrosion, or fission products were not detected during 2019 in aquatic vegetation samples and no unusual trends were noted.

(3) Terrestrial Vegetation Naturally occurring Be-7 and K-40 activity were detected in the terrestrial vegetation indicator location samples. No other radionuclides were detected in terrestrial vegetation. Plant-related activation, corrosion or fission products were not detected during 2019 in terrestrial vegetation and no unusual trends were noted.

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(4) Soil Naturally occurring K-40 activity was detected in the soil sample that was collected from the indicator location. K-40 activity was also detected during pre-operational soil monitoring.

Cs-137 activity was also detected in both indicator soil samples with a range of 95 -138 pCi/kg.

Data was reviewed for soil samples collected pre-operationally. The detected Cs-137 activity range from February of 1985 was 255 to 2,160 pCi/kg. The decay corrected range of pre-operational Cs-137 activity detected in soil is approximately 104 to 882 pCi/kg. The detected Cs-137 activity in soil sampled in 2019 is below and within the decay corrected pre-operational range and is likely due to fallout.

Plant-related activation, corrosion, or fission products were not detected during 2019 in soil samples and no unusual trends were noted.

(5) Turkey (Ingestion Pathway)

Naturally occurring K-40 activity was detected in the turkey sample obtained from the indicator location. No tritium activity was detected in the turkey sample. No activity was attributable to plant operation.

(6) Deer (Ingestion Pathway)

Naturally occurring K-40 activity was detected in the deer sample obtained from the indicator location.

Tritium activity (786.0 pCi/kg) was also detected in the deer sample. The detected tritium activity was attributable to plant operation.

An adult consuming 72.6 kilograms of deer meat, at the measured tritium concentration (786.0 pCi/kg), would receive a committed effective dose equivalent of 0.004 mRem.

No other radionuclides were detected in the deer sample. No unusual trends were identified.

III. PROGRAM REVISIONS/CHANGES No revisions or changes were made to AP 07B-004, Offsite Dose Calculation Manual (Radiological Environmental Monitoring Program) during 2019.

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IV. PROGRAM DEVIATIONS Air Samples The following air sample locations failed to meet the requirement for continuous sampler operation. As described in footnote (1) of procedure AP 07B-004, Offsite Dose Calculation Manual (Radiological Environmental Monitoring Program), Table 5-1, deviations are permitted from the required sampling schedule due to malfunction of sampling equipment and other legitimate reasons.

Location Sample Period Percent Explanation of Deviation/Comments Discrepancy/ Condition Report Number Hours Unavailable 37 4/22/2019 -4/29/2019 22.0% / 37 hrs. Power Outage /

Condition Report 00131943 53 8/12/2019- 8/19/2019 5.3% / 9 hrs. Power Outage /

Condition Report 00134834 Ground Water Protection The following information is being provided in association with the Nuclear Energy Institute (NEI) Groundwater Protection Industry Initiative:

Describe offsite ground water or surface water sample results that exceeded the REMP reporting criteria that were voluntarily communicated to State/Local officials during the calendar year - None.

V. INTERLABORATORY COMPARISON PROGRAM Environmental, Inc., Midwest Laboratory was contracted to perform radiological analysis of environmental samples for WCNOC. The laboratory participated in the intercomparison studies administered by Environmental Resource Associates, Inc. Appendix A is the Interlaboratory Comparison Program Results for Environmental, Inc., Midwest Laboratory. Intercomparison results, in-house spikes, blanks, duplicates and mixed analyte performance evaluation program results are also contained in Appendix A.

VI. COMPARISON TO THE RADIOACTIVE EFFLUENT RELEASE PROGRAM As described in the section discussing radioisotopes found in fish from Coffey County Lake, dose that may be received as a result of tritium released from WCGS is comparable with the theoretical doses calculated by the Radioactive Effluent Release Program.

The theoretical doses calculated by the Radioactive Effluent Release Program assume a person drinks the water from Coffey County Lake and eats the fish from Coffey County Lake. Based upon these assumptions the dose to man from both pathways was calculated to be 0.314 mRem for 2019.

Using sample data obtained from the REMP, an adult drinking 2 liters per day of surface water from Coffey County Lake, using the average tritium activity (10,450 pCi/L), would receive a 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 10 of 32

committed effective dose equivalent of 0.477 mRem per year. For an adult eating 21 kg of fish per year from Coffey County Lake, using the average tritium activity (7,465 pCi/kg), would receive a committed effective dose equivalent of 0.010 mRem per year. Based upon the REMP results, the dose from both pathways was calculated to be 0.487 mRem per year.

It should be noted Coffey County Lake is not used as a drinking water source. Calculating the dose to man for tritium detected in the Coffey County Lake surface water is for comparison purposes only.

The tritium dose values are being compared on a qualitative basis. It is not expected that the annual doses, as calculated in the Radioactive Effluent Release Report, would compare directly to those calculated from the REMP. The Radioactive Effluent Release Report provides a snap shot of potential dose resulting from the year's releases. The REMP data indicates the accumulated result of releasing tritium into the lake since the start of plant operation.

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TABLE 1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DESCRIPTION (SAMPLE COLLECTION SPECIFIED BY AP 07B-004)

EXPOSURE NUMBER OF SAMPLE COLLECTION TYPE AND PATHWAY/ SAMPLES AND FREQUENCY FREQUENCY OF SAMPLE TYPE SAMPLE LOCATIONS ANALYSIS AIRBORNE (See Figures 1 & 5)

Radioiodine and Samples from six Continuous sampler Analyze radioiodine Particulates locations operation with sample canister weekly for collection weekly, or more I-131 frequently if required, by dust loading.

Samples from locations Analyze particulate near the site boundary filter weekly for in three sectors having gross beta activity; the highest calculated perform quarterly annual average D/Q gamma isotopic and one supplemental analysis composite location (Locations 2, (by location) 18, 37, or 49 on Figure 1)

Sample from the vicinity of a community having the highest calculated annual average D/Q (Location 32 on Figure 1, New Strawn)

Sample from a control location 9.5 to 18.5 miles distant in a low ranked D/Q sector (Location 53 on Figure 5) 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 12 of 32

TABLE 1 (Cont.)

EXPOSURE NUMBER OF SAMPLE COLLECTION TYPE AND PATHWAY/ SAMPLES AND FREQUENCY FREQUENCY OF SAMPLE TYPE SAMPLE LOCATIONS ANALYSIS DIRECT (See Figures 2 & 5)

RADIATION 39 routine monitoring Quarterly Gamma dose stations with two or quarterly more dosimeters measuring dose continuously, placed as follows:

An inner ring of stations, one in each meteorological sector 0-3 mile range from the site (Locations 1, 7, 9, 11-13, 18, 26, 27, 29, 30, 37, 38, 46, & 49 on Figure 2).

An outer ring of stations, one in each meteorological sector in the 3 to 5 mile range from the site (Locations 4, 5, 15-17, 19, 22-25, 32, 34-36, 50 & 51 on Figure 2). Four sectors

[A, B, G & J] contain an additional station (Locations 2, 8, 14 &

20).

The balance of the stations to be placed in special interest areas such as population centers (Locations 23, 32 & 52), nearby residences 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 13 of 32

TABLE 1 (Cont.)

EXPOSURE NUMBER OF SAMPLE COLLECTION TYPE AND PATHWAY/ SAMPLES AND FREQUENCY FREQUENCY OF SAMPLE TYPE SAMPLE LOCATIONS ANALYSIS DIRECT RADIATION (cont.)

(many locations are near a residence),

schools (Locations 23

& 52), Wilson Cadman Wildlife Education Area (44), CCL Public Fishing Area (46) and in two areas to serve as control stations 10-20 miles distant from the site (Locations 39 and 53 on Figure 5).

WATERBORNE (See Figure 3)

Surface One sample upstream Monthly grab sample Monthly gamma (Location JRR on isotopic analysis and Figure 3) and one composite for tritium sample downstream analysis quarterly (Location SP on Figure 3).

Ground Samples from one or Quarterly grab sample Quarterly gamma two sources only if isotopic analysis and likely to be affected. tritium analysis Indicator samples at locations hydrologically down-gradient of the site (Locations C-10, C-49, F-1, G-2, J-1 and J-2 on Figure 3);

control sample at a location hydrologically upgradient of the site (Location B-12 on Figure 3).

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TABLE 1 (Cont.)

EXPOSURE NUMBER OF SAMPLE COLLECTION TYPE AND PATHWAY/ SAMPLES AND FREQUENCY FREQUENCY OF SAMPLE TYPE SAMPLE LOCATIONS ANALYSIS WATERBORNE (cont.)

Drinking Sample of municipal Monthly Composite Monthly gamma water supply at an isotopic analysis and indicator location gross beta analysis downstream of the of composite Neosho River-Wolf sample. Quarterly Creek confluence tritium analysis of (Location IO-DW on composites.

Figure 5); control sample from location upstream of the Neosho River-Wolf Creek confluence (Location BW-15 on Figure 3).

Shoreline One sample from the Semiannually Semiannual gamma Sediment vicinity of Coffey isotopic analysis County Lake discharge cove (Location DC on Figure 3); control sample from John Redmond Reservoir (Location JRR on Figure 3).

INGESTION (See Figures 4 & 5)

Milk Samples from milking Semimonthly April to Gamma isotopic animals at three November; monthly analysis and I-131 indicator locations December-March analysis of each within 5 miles of the sample site having the highest dose potential (currently there are no locations producing milk for human consumption within 5 miles of the site); one sample from a control location greater than 10 miles from the site if indicator locations are sampled.

2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 15 of 32

TABLE 1 (Cont.)

EXPOSURE NUMBER OF SAMPLE COLLECTION TYPE AND PATHWAY/ SAMPLES AND FREQUENCY FREQUENCY OF SAMPLE TYPE SAMPLE LOCATIONS ANALYSIS INGESTION (cont.)

Fish Indicator samples of 1 Semiannually Gamma isotopic to 3 recreationally analysis on edible important species from portions Coffey County Lake; control samples of similar species from John Redmond Reservoir spillway (Figure 4).

Broadleaf Samples of available Monthly when available Gamma isotopic Vegetation broadleaf vegetation analysis on edible from two indicator portions locations (using the criteria from the Land Use Census section) with highest calculated annual average D/Q (Locations A-3 and Q-6 and alternate locations B-1, H-2, N-1 and R-2 on Figure 4); sample of similar broadleaf vegetation from a control location 9.5 to 18.5 miles distant in a low ranked D/Q sector (Location D-2 on Figure 5).

Irrigated Crops Sample of crops At time of harvest Gamma isotopic irrigated with water analysis on edible from the Neosho River portions downstream of the Neosho River - Wolf Creek confluence (locations will vary from year to year, e.g.,

Location NR-D1 and NR-D2 on Figure 5).

2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 16 of 32

TABLE 2 SAMPLE LOCATION IDENTIFIERS, DISTANCES (Miles) AND DIRECTIONS (Sectors)

Sample Type Location Distance from Direction Sector Identifier Reactor Air Particulates and Radioiodine 2 2.7 N A 18 3.0 SSE H 32 3.1 WNW P 37 2.0 NNW R 49 0.8 NNE B 53 10.8 ENE D Dosimeters 1 1.4 N A 2 2.7 N A 4 4.0 NNE B 5 4.1 NE C 7 2.1 NE C 8 1.7 NNE B 9 2.0 ENE D 11 1.7 E E 12 1.9 ESE F 13 1.6 SE G 14 2.5 SE G 15 4.6 ESE F 16 4.3 E E 17 3.7 SE G 18 3.0 SSE H 19 3.9 SSE H 20 3.3 S J 22 3.9 SSW K 23 4.3 SW L 24 4.1 WSW M 25 3.4 W N 26 2.4 WSW M 27 2.2 SW L 29 2.7 SSW K 30 2.5 W N 32 3.1 WNW P 34 4.4 NW Q 35 4.6 NNW R 36 4.2 N A 37 2.0 NNW R 38 1.2 NW Q 39 13.1 N A 41 0.8 NNW R 42 0.8 SSE H 43 0.7 WNW P 44 3.0 NNW R 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 17 of 32

TABLE 2 (Cont.)

SAMPLE LOCATION IDENTIFIERS, DISTANCES (Miles) AND DIRECTIONS (Sectors)

Sample Type Location Distance from Direction Sector Identifier Reactor Dosimeters 46 1.6 WNW P 49 0.8 NNE B 50 3.6 ENE D 51 4.3 S J 52 3.6 SW L 53 10.8 ENE D Surface Water JRR 3.7 W N SP 3.2 SSE H Ground Water B-12 1.9 NNE B C-10 2.7 W N C-49/L-49 2.8 SW L F-1 2.5 ESE F G-2 3.6 SE G J-1 3.8 S J J-2 4.3 S J Drinking Water BW-15 3.9 SW L IO-DW 26.1 SSE H Shoreline Sediment DC 0.8 WNW P EEA 3.0 NNW R JRR 3.6 W N SC 0.8 NNW R Fish CCL 0.6 E to NNW E to R JRR 3.7 W N Food/Garden A-3 2.6 N A B-1 0.8 NNE B D-2 14.8 ENE D H-2 3.0 SSE H Q-6 2.4 NW Q Crops NR-D1 8.9 S J NR-D2 11.5 S J NR-U1 4.0 SSW K Bottom Sediment DC 0.9 WNW P EEA 3.0 NNW R ESW 0.5 E E JRR 3.7 W N MUDS 1.5 WNW P UHS 0.6 E E Aquatic Vegetation DC ALT 1.5 NW Q EEA 3.0 NNW R MUDS 1.5 WNW P SC 0.8 NNW R 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 18 of 32

TABLE 2 (Cont.)

SAMPLE LOCATION IDENTIFIERS, DISTANCES (Miles) AND DIRECTIONS (Sectors)

Sample Type Location Distance from Direction Sector Identifier Reactor Terrestrial Vegetation EEA 3.0 NNW R MUDS 1.5 WNW P Soil EEA 3.0 NNW R MUDS 1.5 WNW P Meat (Turkey) J4.0 4.0 S J Meat (Deer) J3.5 3.5 S J 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 19 of 32

TABLE 3 OSL Dosimeter Results (mR/Standardized 90-day Quarter)

Location Qtr. 1 Qtr. 2 Qtr. 3 Qtr. 4 Total Annual (mR) (mR) (mR) (mR) Exposure (mR) 1 18.0 19.4 17.4 18.2 73.0 2 14.4 15.8 17.4 17.0 64.6 4 18.4 16.8 18.7 15.8 69.7 5 15.0 16.4 17.1 13.7 62.2 7 15.0 16.2 17.3 17.6 66.1 8 19.1 17.2 18.3 17.6 72.2 9 15.0 16.6 16.6 14.0 62.2 11 17.7 19.5 17.9 18.2 73.3 12 16.0 17.5 16.6 17.3 67.4 13 16.7 20.5 19.9 17.6 74.7 14 16.7 20.8 17.2 15.5 70.2 15 17.4 15.9 17.6 12.8 63.7 16 16.4 15.3 17.9 12.8 62.4 17 17.0 18.6 18.2 14.9 68.7 18 17.0 17.9 15.6 13.1 63.6 19 18.4 16.9 19.5 14.3 69.1 20 14.7 16.0 17.6 14.0 62.3 22 19.0 20.5 17.9 14.9 72.3 23 18.7 17.1 18.7 15.2 69.7 24 15.4 17.8 17.7 14.9 65.8 25 15.0 16.1 15.8 14.0 60.9 26 14.7 18.7 16.7 11.3 61.4 27 13.0 17.4 18.7 14.3 63.4 29 14.4 16.4 14.4 12.5 57.7 30 14.4 18.1 19.0 15.2 66.7 32 17.0 18.1 15.8 11.9 62.8 34 18.7 20.4 19.0 14.6 72.7 35 17.4 17.8 16.4 13.7 65.3 36 18.0 17.8 18.7 13.7 68.2 37 16.7 14.8 17.1 12.2 60.8 38 17.4 21.7 17.4 13.7 70.2 39 17.4 17.4 15.1 12.8 62.7 41 18.4 18.1 17.7 14.3 68.5 42 11.5 11.4 12.6 8.3 43.8 43 11.5 13.3 14.6 7.4 46.8 44 15.7 19.4 15.8 13.7 64.6 46 18.4 16.8 17.4 13.4 66.0 49 14.4 13.6 15.6 11.9 55.5 50 17.7 20.4 20.4 14.6 73.1 51 18.0 20.1 18.0 15.8 71.9 52 18.0 18.1 17.7 16.7 70.5 53 18.7 20.7 18.0 16.4 73.8 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 20 of 32

FIGURE 1 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 21 of 32

FIGURE 2 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 22 of 32

FIGURE 3 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 23 of 32

FIGURE 4 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 24 of 32

FIGURE 5 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 25 of 32

CHART 1 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 26 of 32

CHART 2 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 27 of 32

CHART 3 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 28 of 32

CHART 4 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 29 of 32

CHART 5 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 30 of 32

CHART 6 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 31 of 32

CHART 7 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 32 of 32

APPENDIX A INTERLABORATORY AND INTRALABORATORY COMPARISON PROGRAM RESULTS NOTE: Appendix A is updated four times a year. The complete appendix is included in March, June, September and December monthly progress reports only.

January, 2019 through December, 2019

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

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

Results in Table A-1 were obtained through participation in the RAD PT Study Proficiency Testing Program administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

Results in Table A-2 were obtained through participation in the New York Department of Health Environmental Laboratory Approval Program (ELAP) PT Table A-3 lists results for thermoluminescent dosimeters (TLDs), via irradiation and evaluation by the University of Wisconsin-Madison Radiation Calibration Laboratory at the University of Wisconsin Medical Radiation Research Center.

Table A-4 lists results of the analyses on in-house spiked samples for the past twelve months. All samples are prepared using NIST traceable sources. Data for previous years available upon request.

Table A-5 lists results of the analyses on in-house blank samples for the past twelve months. Data for previous years available upon request.

Table A-6 lists analytical results from the in-house duplicate program for the past twelve months. Acceptance is based on the each result being with 25% of the mean of the two results or the two sigma uncertanties of each result overlap.

The results in Table A-7 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

Results in Table A-8 were obtained through participation in the MRAD PT Study Proficiency Testing Program administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurement Laboratory Quality Assessment Program (EML).

Attachment A lists the laboratory acceptance criteria for various analyses.

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

A-1

Attachment A ACCEPTANCE CRITERIA FOR SPIKED SAMPLES Analysis Ratio of lab result to known value.

Gamma Emitters 0.8 to 1.2 Strontium-89, 0.8 to 1.2 Strontium-90 Potassium-40 0.8 to 1.2 Gross alpha 0.5 to 1.5 Gross beta 0.8 to 1.2 Tritium 0.8 to 1.2 Radium-226, 0.7 to 1.3 Radium-228 Plutonium 0.8 to 1.2 Iodine-129, 0.8 to 1.2 Iodine-131 Nickel-63, 0.7 to 1.3 Technetium-99, Uranium-238 Iron-55 0.8 to 1.2 Other Analyses 0.8 to 1.2 A-2

TABLE A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA) a.

RAD study Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result Result Limits Acceptance ERW-71 1/7/2019 Ba-133 97.9 +/- 4.5 99.5 84.1 - 109 Pass ERW-71 1/7/2019 Cs-134 45.4 +/- 3.1 49.1 39.5 - 54.0 Pass ERW-71 1/7/2019 Cs-137 129 +/-6 125 112 - 140 Pass ERW-71 1/7/2019 Co-60 98.1 +/- 4.1 96.4 86.8 - 108 Pass ERW-71 1/7/2019 Zn-65 80.4 +/- 7.8 77.4 69.5 +/- 93.2 Pass ERW-73 1/7/2019 Gr. Alpha 22.2 +/- 1.6 21.8 10.9 - 29.5 Pass ERW-73 1/7/2019 Gr. Beta 46.4 +/- 1.4 55.7 38.1 - 62.6 Pass ERW-75 1/7/2019 Ra-226 7.19 +/- 0.30 7.37 5.55 +/- 8.72 Pass ERW-75 1/7/2019 Ra-228 4.02 +/- 0.70 4.28 2.48 - 5.89 Pass ERW-75 1/7/2019 Uranium 50.2 +/- 2.9 68.2 55.7 - 75.0 Failb ERW-77 1/7/2019 H-3 2,129 +/- 158 2,110 1,740 - 2,340 Pass ERW-397 2/11/2019 I-131 27.2 +/- 1.0 25.9 25.1 - 30.6 Pass ERW-1141 4/8/2019 Ra-226 7.58 +/- 0.53 7.15 5.39 - 8.48 Pass ERW-1141 4/8/2019 Ra-228 2.64 +/- 0.79 2.94 1.54 - 4.35 Pass ERW-1141 4/8/2019 Uranium 67.0 +/- 0.9 55.9 45.6 - 61.5 Failc ERW-2471 7/8/2019 Ba-133 66.5 +/- 4.0 66.9 55.8 - 73.6 Pass ERW-2471 7/8/2019 Cs-134 29.6 +/- 2.6 32.0 25.1 - 35.2 Pass ERW-2471 7/8/2019 Cs-137 21.3 +/- 3.6 21.4 17.6 - 26.7 Pass ERW-2471 7/8/2019 Co-60 99.9 +/- 4.4 95.1 85.6 - 107.0 Pass ERW-2471 7/8/2019 Zn-65 43.7 +/- 6.2 41.2 35.3 - 51.4 Pass ERW-2473 7/8/2019 Gr. Alpha 41.7 +/- 2.1 70.6 37.1 - 87.1 Pass ERW-2473 7/8/2019 Gr. Beta 57.0 +/- 1.6 63.9 44.2 - 70.5 Pass ERW-2477 7/8/2019 Ra-226 16.2 +/- 0.5 18.5 13.8 - 21.1 Pass ERW-2477 7/8/2019 Ra-228 6.2 +/- 0.8 8.2 5.2 - 10.3 Pass ERW-2477 7/8/2019 Uranium 63.8 +/- 3.6 68.3 55.8 - 75.1 Pass ERW-2479 7/8/2019 H-3 8,630 +/- 200 16,700 14,600 - 18,400 Faild ERW-2475 7/8/2019 I-131 33.6 +/- 1.3 29.6 24.6 - 34.6 Pass a

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

b In order to get to the root cause of the above "Fail" resolution the U-232 tracer was standardized using a known concentration of NIST U-238 solution. A duplicate analysis was performed and the results obtained were well within the acceptance range (Known value for Total Uranium=68.2 pCi/L, acceptance range of (55.7-75 pCi/L). The results obtained were 63.3 pCi/L and 66.0 pCi/L respectively.

c The standardized U-232 value utilized on ERA sample ERW-1141 above was found to be estimated high due to interferences in the U-238 solution causing ERW-1141 to fail the study. After performing U-isotopic chemistry on the NIST-Uranium solution to remove interferences a more accurate U-232 tracer concentration was obtained.

The Uranium result in the subsequent ERA PT study was acceptable. See ERW-2477 Uranium result above.

d EIML's routine H-3 analysis does include a blank sample. The ERA provided blank was paired with a H-3 standard vial and EIML's blank was also paired with a standard vial. Inadvertently the efficiency was overestimated by a factor of 2.

This understated the calculated results by half. The result of reanalysis (17,400 pCi/L) is within the control limits for the study.

A-3

TABLE A-2. Interlaboratory Comparison Crosscheck program, New York Department of Health (ELAP) a.

Concentration (pCi/L)

Lab Code Date Analysis Laboratory Assigned Acceptance Result Value Limits Acceptance Shipment 427R NYW-3472 9/17/2019 H-3 5250 +/- 229 4991 4280 - 5490 Pass NYW-3476 9/17/2019 Gross Alpha 18.0 +/- 1.2 20.1 9.99 - 27.5 Pass NYW-3476 9/17/2019 Gross Beta 22.7 +/- 1.0 27.2 17.1 - 35.1 Pass NYW-3478 9/17/2019 I-131 18.7 +/- 1.8 15.6 12.8 - 19.3 Pass NYW-3480 9/17/2019 Ra-226 5.02 +/- 0.37 4.41 3.37 - 5.43 Pass NYW-3480 9/17/2019 Ra-228 16.0 +/- 1.9 18.3 12.3 - 21.9 Pass NYW-3480 9/17/2019 Uranium 13.7 +/- 0.9 13.9 11.0 - 15.7 Pass NYW-3482 9/17/2019 Co-60 63.9 +/- 4.0 63.0 56.7 - 71.8 Pass NYW-3482 9/17/2019 Zn-65 108 +/-9 113 97.2 - 129 Pass NYW-3482 9/17/2019 Ba-133 53.3 +/- 4.3 61.9 51.4 - 68.2 Pass NYW-3482 9/17/2019 Cs-134 47.2 +/- 3.4 55.8 45.1 - 61.4 Pass NYW-3482 9/17/2019 Cs-137 52.0 +/- 4.6 53.8 48.4 - 62.0 Pass a

Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by the New York Department of Health Laboratory Approval Program(NY ELAP).

A-4

TABLE A-3. Thermoluminescent Dosimetry, (TLD, CaSO4: Dy Cards).a mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 1 2019-1 11/11/2019 Spike 1 126.0 128.3 0.02 2019-1 11/11/2019 Spike 2 126.0 122.2 -0.03 2019-1 11/11/2019 Spike 3 126.0 122.5 -0.03 2019-1 11/11/2019 Spike 4 126.0 119.3 -0.05 2019-1 11/11/2019 Spike 5 126.0 116.9 -0.07 2019-1 11/11/2019 Spike 6 126.0 109.5 -0.13 2019-1 11/11/2019 Spike 7 126.0 114.6 -0.09 2019-1 11/11/2019 Spike 8 126.0 121.8 -0.03 2019-1 11/11/2019 Spike 9 126.0 120.2 -0.05 2019-1 11/11/2019 Spike 10 126.0 126.4 0.00 2019-1 11/11/2019 Spike 11 126.0 125.0 -0.01 2019-1 11/11/2019 Spike 12 126.0 109.0 -0.13 2019-1 11/11/2019 Spike 13 126.0 123.4 -0.02 2019-1 11/11/2019 Spike 14 126.0 118.2 -0.06 2019-1 11/11/2019 Spike 15 126.0 134.3 0.07 2019-1 11/11/2019 Spike 16 126.0 120.1 -0.05 2019-1 11/11/2019 Spike 17 126.0 131.3 0.04 2019-1 11/11/2019 Spike 18 126.0 120.4 -0.04 2019-1 11/11/2019 Spike 19 126.0 121.1 -0.04 2019-1 11/11/2019 Spike 20 126.0 122.8 -0.03 Mean (Spike 1-20) 121.4 -0.04 Passd Standard Deviation (Spike 1-20) 6.2 0.05 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

b Reported dose was converted from exposure (R) to Air Kerma (cGy) using a conversion of 0.876. Conversion from air kerma to ambient dose equivalent for Cs-137 at the reference dose point H*(10)K a = 1.20 . mrem/cGy = 1000.

c Performance Quotient (P) is calculated as ((reported dose - conventially true value) ÷ conventially true value) where the conventially true value is the delivered dose.

d Acceptance is achieved when neither the absolute value of the mean of the P values, nor the standard deviation of the P values exceed 0.15.

A-5

TABLE A-3. Thermoluminescent Dosimetry, (TLD, CaSO4: Dy Cards).a mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 2 2019-2 11/11/2019 Spike 21 79.0 78.8 0.00 2019-2 11/11/2019 Spike 22 79.0 71.8 -0.09 2019-2 11/11/2019 Spike 23 79.0 75.8 -0.04 2019-2 11/11/2019 Spike 24 79.0 71.3 -0.10 2019-2 11/11/2019 Spike 25 79.0 74.5 -0.06 2019-2 11/11/2019 Spike 26 79.0 71.6 -0.09 2019-2 11/11/2019 Spike 27 79.0 73.3 -0.07 2019-2 11/11/2019 Spike 28 79.0 74.0 -0.06 2019-2 11/11/2019 Spike 29 79.0 73.8 -0.07 2019-2 11/11/2019 Spike 30 79.0 76.0 -0.04 2019-2 11/11/2019 Spike 31 79.0 76.7 -0.03 2019-2 11/11/2019 Spike 32 79.0 77.8 -0.02 2019-2 11/11/2019 Spike 33 79.0 75.2 -0.05 2019-2 11/11/2019 Spike 34 79.0 69.1 -0.13 2019-2 11/11/2019 Spike 35 79.0 68.7 -0.13 2019-2 11/11/2019 Spike 36 79.0 68.2 -0.14 2019-2 11/11/2019 Spike 37 79.0 67.9 -0.14 2019-2 11/11/2019 Spike 38 79.0 68.9 -0.13 2019-2 11/11/2019 Spike 39 79.0 78.1 -0.01 2019-2 11/11/2019 Spike 40 79.0 68.6 -0.13 Mean (Spike 21-40) 73.0 -0.08 Passd Standard Deviation (Spike 21-40) 3.6 0.05 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

b Reported dose was converted from exposure (R) to Air Kerma (cGy) using a conversion of 0.876. Conversion from air kerma to ambient dose equivalent for Cs-137 at the reference dose point H*(10)K a = 1.20 . mrem/cGy = 1000.

c Performance Quotient (P) is calculated as ((reported dose - conventially true value) ÷ conventially true value) where the conventially true value is the delivered dose.

d Acceptance is achieved when neither the absolute value of the mean of the P values, nor the standard deviation of the P values exceed 0.15.

A-6

TABLE A-4. In-House "Spiked" Samples Concentrationa Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPW-61 1/5/2019 Ra-226 13.4 +/- 0.4 12.3 9.8 - 14.8 Pass 1.09 SPW-118 1/14/2019 H-3 15,463 +/- 369 16,507 13,206 - 19,808 Pass 0.94 SPW-178 1/16/2019 Ra-228 17.7 +/- 2.1 15.1 12.10 - 18.14 Pass 1.17 SPW-199 1/18/2019 Sr-90 17.6 +/- 1.2 17.9 14.3 - 21.5 Pass 0.98 SPW-250 1/24/2019 Ni-63 356.3 +/- 44.5 465 326 - 605 Pass 0.77 SPW-256 1/15/2019 Ra-226 12.0 +/- 0.4 12.3 9.8 - 14.8 Pass 0.98 SPW-271 3/18/2019 H-3 22,035 +/- 450 21,700 17,360 - 26,040 Pass 1.02 SPW-281 1/25/2019 Ra-226 11.6 +/- 0.4 12.3 9.8 - 14.8 Pass 0.94 W-012119 4/29/2016 Cs-134 37.3 +/- 10.6 36.2 29.0 - 43.4 Pass 1.03 W-012119 4/29/2016 Cs-137 82.7 +/- 8.0 71.9 57.5 - 86.3 Pass 1.15 W-012319 4/29/2016 Cs-134 33.4 +/- 10.1 36.2 25.3 - 47.1 Pass 0.92 W-012319 4/29/2016 Cs-137 79.1 +/- 9.6 71.9 57.5 - 86.3 Pass 1.10 W-012519 4/29/2016 Cs-134 35.0 +/- 7.7 36.2 29.0 - 43.4 Pass 0.97 W-012519 4/29/2016 Cs-137 79.2 +/- 7.9 71.9 57.5 - 86.3 Pass 1.10 W-012919 4/29/2016 Cs-134 32.3 +/- 8.3 36.2 29.0 - 43.4 Pass 0.89 W-012919 4/29/2016 Cs-137 82.3 +/- 8.3 71.9 57.5 - 86.3 Pass 1.14 SPW-370 3/19/2019 H-3 21,689 +/- 444 21,700 17,360 - 26,040 Pass 1.00 SPW-400 1/31/2019 Ra-226 11.6 +/- 0.4 12.3 8.6 - 16.0 Pass 0.95 SPW-461 2/12/2019 Ra-226 11.1 +/- 0.4 12.3 8.6 - 16.0 Pass 0.90 W-020619 4/26/2016 Cs-134 35.0 +/- 14.9 36.2 29.0 - 43.4 Pass 0.97 W-020619 4/29/2016 Cs-137 72.8 +/- 8.9 71.9 57.5 - 86.3 Pass 1.01 W-020819 4/26/2016 Cs-134 36.7 +/- 8.6 36.2 29.0 - 43.4 Pass 1.01 W-020819 4/29/2016 Cs-137 76.7 +/- 8.7 71.9 57.5 - 86.3 Pass 1.07 SPW-568 2/21/2019 Ra-226 10.3 +/- 0.3 12.3 8.6 - 16.0 Pass 0.84 W-021319 4/29/2016 Cs-134 37.7 +/- 11.5 36.2 29.0 - 43.4 Pass 1.04 W-021319 4/26/2016 Cs-137 75.8 +/- 9.6 71.9 57.5 - 86.3 Pass 1.05 SPW-469 3/19/2019 H-3 21,696 +/- 447 21,700 17,360 - 26,040 Pass 1.00 SPW-600 3/6/2019 H-3 20,710 +/- 425 21,700 17,360 - 26,040 Pass 0.95 SPW-837 3/21/2019 Ra-228 11.7 +/- 1.5 15.1 10.58 - 19.66 Pass 0.78 SPW-709 3/19/2019 H-3 20,369 +/- 421 21,700 17,360 - 26,040 Pass 0.94 SPW-818 3/19/2019 H-3 20,457 +/- 424 21,700 17,360 - 26,040 Pass 0.94 SPW-845 3/22/2019 U-234 15.1 +/- 0.5 13.6 9.5 - 17.7 Pass 1.11 SPW-845 3/22/2019 U-238 15.3 +/- 0.5 13.1 9.2 - 17.0 Pass 1.17 SPW-934 3/19/2019 H-3 20,487 +/- 421 21,700 17,360 - 26,040 Pass 0.94 SPW-1061 3/1/2019 Ra-226 10.6 +/- 0.3 12.3 8.6 - 16.0 Pass 0.86 SPW-1091 4/10/2019 H-3 20,323 +/- 421 21,700 17,360 - 26,040 Pass 0.94 SPW-1093 4/8/2019 Ra-228 14.9 +/- 1.9 15.1 10.6 - 19.6 Pass 0.98 SPW-1267 4/16/2019 H-3 20,302 +/- 421 21,700 17,360 - 26,040 Pass 0.94 SPW-1339 4/18/2019 H-3 19,924 +/- 417 21,700 17,360 - 26,040 Pass 0.92 SPW-1403e 4/25/2019 Gr. Alpha 56.7 +/- 2.6 72.4 36.2 - 108.6 Pass 0.78 SPW-1403e 4/25/2019 Gr. Beta 43.2 +/- 1.4 54.8 43.8 - 65.8 Fail 0.79 SPW-1427 4/26/2019 H-3 20,119 +/- 418 21,700 15,190 - 28,210 Pass 0.93 SPW-1537 5/6/2019 Sr-90 19.9 +/- 1.2 17.9 14.3 - 21.5 Pass 1.11 W-050719 4/29/2016 Cs-134 38.5 +/- 9.0 36.2 29.0 - 43.4 Pass 1.06 W-050719 4/26/2016 Cs-137 85.2 +/- 8.5 71.9 57.5 - 86.3 Pass 1.18 SPW-1582 5/9/2019 H-3 20,492 +/- 423 21,700 15,190 - 28,210 Pass 0.94 A-7

TABLE A-4. In-House "Spiked" Samples Concentrationa Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known W-050919 4/29/2016 Cs-134 37.4 +/- 8.9 36.2 29.0 - 43.4 Pass 1.03 W-050919 4/26/2016 Cs-137 81.5 +/- 7.8 71.9 57.5 - 86.3 Pass 1.13 SPW-1596 5/8/2019 Ra-228 14.1 +/- 1.7 15.1 10.6 - 19.6 Pass 0.94 W-051419 4/29/2016 Cs-134 36.2 +/- 11.7 36.2 29.0 - 43.4 Pass 1.00 W-051419 4/26/2016 Cs-137 75.8 +/- 10.0 71.9 57.5 - 86.3 Pass 1.05 SPW-1676 5/17/2019 H-3 20,233 +/- 420 21,700 15,190 - 28,210 Pass 0.93 SPW-1799 5/20/2019 H-3 20,428 +/- 422 21,700 15,190 - 28,210 Pass 0.94 SPW-1858 5/28/2019 H-3 20,367 +/- 522 21,700 15,190 - 28,210 Pass 0.94 SPW-1890 5/30/2019 H-3 20,206 +/- 419 21,700 15,190 - 28,210 Pass 0.93 SPW-2014 5/31/2019 Ra-226 11.9 +/- 0.3 12.3 8.6 - 16.0 Pass 0.97 SPW-2030 6/12/2019 Ni-63 377 +/- 45 464.8 325 - 604 Pass 0.81 SPW-2093 6/18/2019 H-3 20,158 +/- 418 21,700 17,360 - 26,040 Pass 0.93 W-062419 4/29/2016 Cs-134 33.0 +/- 12.4 36.2 29.0 - 43.4 Pass 0.91 W-062419 4/26/2016 Cs-137 66.0 +/- 10.4 71.9 57.5 - 86.3 Pass 0.92 SPW-2338 6/26/2019 H-3 20,032 +/- 417 21,700 17,360 - 26,040 Pass 0.92 SPW-2552 7/1/2019 Gr. Alpha 20.4 +/- 1.5 21.8 10.9 - 32.7 Pass 0.94 SPW-2552 7/1/2019 Gr. Beta 46.1 +/- 1.3 55.7 44.6 - 66.8 Pass 0.83 W-072619 4/29/2016 Cs-134 36.3 +/- 9.2 36.2 29.0 - 43.4 Pass 1.00 W-072619 4/26/2016 Cs-137 79.7 +/- 7.6 71.9 57.5 - 86.3 Pass 1.11 SPW-3188 7/30/2019 Ra-226 11.9 +/- 0.3 12.3 8.6 - 16.0 Pass 0.97 SPW-2947 8/9/2019 H-3 20,128 +/- 425 21,700 17,360 - 26,040 Pass 0.93 SPW-3003 8/14/2019 H-3 20,588 +/- 435 21,700 17,360 - 26,040 Pass 0.95 W-081519 4/26/2019 Cs-134 36.2 +/- 9.2 36.2 29.0 - 43.4 Pass 1.00 W-081519 4/26/2019 Cs-137 78.1 +/- 8.4 71.9 57.5 - 86.3 Pass 1.09 W-082119 4/26/2019 Cs-134 32.8 +/- 9.1 36.2 29.0 - 43.4 Pass 0.91 W-082119 4/26/2019 Cs-137 79.1 +/- 7.9 71.9 57.5 - 86.3 Pass 1.10 SPW-3151 8/26/2019 H-3 20,329 +/- 428 21,700 17,360 - 26,040 Pass 0.94 W-082619 4/26/2019 Cs-134 33.3 +/- 17.8 36.2 29.0 - 43.4 Pass 0.92 W-082619 4/26/2019 Cs-137 82.6 +/- 13.2 71.9 57.5 - 86.3 Pass 1.15 W-082719 4/26/2019 Cs-134 33.9 +/- 7.0 36.2 29.0 - 43.4 Pass 0.94 W-082719 4/26/2019 Cs-137 81.4 +/- 6.0 71.9 57.5 - 86.3 Pass 1.13 SPW-3359 8/30/2019 Gr. Alpha 54.2 +/- 0.3 72.4 36.2 - 108.6 Pass 0.75 SPW-3359 8/30/2019 Gr. Beta 59.7 +/- 0.2 54.8 43.8 - 65.8 Pass 1.09 SPW-3323 9/6/2019 Ra-228 12.7 +/- 1.8 15.1 10.6 - 19.6 Pass 0.84 W-091019 4/26/2019 Cs-134 31.0 +/- 11.3 36.2 29.0 - 43.4 Pass 0.86 W-091019 4/26/2019 Cs-137 80.5 +/- 10.0 71.9 57.5 - 86.3 Pass 1.12 SPW-3349 9/10/2019 H-3 19,851 +/- 422 21,700 17,360 - 26,040 Pass 0.91 SPW-3410 9/13/2019 H-3 20,267 +/- 431 21,700 17,360 - 26,040 Pass 0.93 W-091719 4/26/2019 Cs-134 39.3 +/- 12.6 36.2 29.0 - 43.4 Pass 1.09 W-091719 4/26/2019 Cs-137 81.1 +/- 9.9 71.9 57.5 - 86.3 Pass 1.13 SPW-3450 9/17/2019 H-3 20,036 +/- 427 21,700 17,360 - 26,040 Pass 0.92 W-091919 9/19/2019 Cs-134 40.0 +/- 10.7 36.2 29.0 - 43.4 Pass 1.10 W-091919 9/19/2019 Cs-137 71.0 +/- 8.7 71.9 57.5 - 86.3 Pass 0.99 SPW-3569 8/28/2019 Ra-226 11.9 +/- 0.3 12.3 8.6 - 16.0 Pass 0.97 SPW-3571 9/27/2019 H-3 21,026 +/- 440 21,700 17,360 - 26,040 Pass 0.97 A-8

TABLE A-4. In-House "Spiked" Samples Concentrationa b

Lab Code Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPW-3615 10/1/2019 Ra-228 18.9 +/- 2.5 14.9 10.4 - 19.3 Pass 1.27 SPW-3706 10/8/2019 H-3 20,082 +/- 427 21,700 17,360 - 26,040 Pass 0.93 SPW-4093 10/14/2019 Gr. Alpha 20.8 +/- 0.1 19.7 9.9 - 29.6 Pass 1.06 SPW-4093 10/14/2019 Gr. Beta 63.2 +/- 0.1 61.1 48.9 - 73.3 Pass 1.03 SPW-4095 10/24/2019 H-3 20,684 +/- 432 21,700 17,360 - 26,040 Pass 0.95 SPW-4144 9/26/2019 Ra-226 12.8 +/- 0.3 12.3 8.6 - 16.0 Pass 1.04 W-091719 3/19/2018 H-3 22,291 +/- 470 21,700 17,360 - 26,040 Pass 1.03 SPW-4239 10/30/2019 Ra-228 12.4 +/- 1.8 14.9 10.4 - 19.3 Pass 0.84 SPW-4254 11/8/2019 H-3 20,187 +/- 427 21,700 17,360 - 26,040 Pass 0.93 SPW-4368 11/14/2019 H-3 20,386 +/- 429 21,700 17,360 - 26,040 Pass 0.94 SPW-4370 10/30/2019 Ra-226 12.8 +/- 0.4 12.3 8.6 - 16.0 Pass 1.04 SPW-4472 11/21/2019 H-3 20,479 +/- 432.0 21,700 17,360 - 26,040 Pass 0.94 SPW-4474 11/22/2019 Sr-90 18.9 +/- 1.2 17.9 14.3 - 21.5 Pass 1.06 SPW-4602 12/5/2019 H-3 20,187 +/- 429 21,700 17,360 - 26,040 Pass 0.93 W-121119 3/19/2018 H-3 22,734 +/- 477 21,700 17,360 - 26,040 Pass 1.05 SPW-4663 12/11/2019 Ra-228 11.2 +/- 1.6 14.9 10.4 - 19.3 Pass 0.75 SPW-4688 12/13/2019 H-3 20,506 +/- 431 21,700 17,360 - 26,040 Pass 0.94 SPW-4734 11/15/2019 Ra-226 12.6 +/- 0.3 12.3 8.6 - 16.0 Pass 1.02 SPW-4743 12/5/2019 Ra-226 10.0 +/- 0.3 12.3 8.6 - 16.0 Pass 0.81 SPW-4745 12/19/2019 H-3 20,067 +/- 427 21,700 17,360 - 26,040 Pass 0.92 SPW-4889 12/19/2019 Ra-226 9.3 +/- 0.3 12.3 8.6 - 16.0 Pass 0.76 SPW-4636 12/27/2019 Tc-99 94.3 +/- 8.2 90.3 72.2 - 108.4 Pass 1.04 SPW-4899 1/3/2020 H-3 20,386 +/- 432 21,700 17,360 - 26,040 Pass 0.94 a

Liquid sample results are reported in pCi/Liter, air filters ( pCi/m3), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

b Laboratory codes : W & SPW (Water), MI (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

d Control limits are listed in Attachment A of this report.

e The LCS sample was prepared from an Environmental Resource Associates (ERA) sample of known activity. While the analysis did satisfy the acceptance criteria of the ERA study from which it was sourced, it did not satisfy EIML's internal LCS acceptance criteria. An investigation is in process to determine the reason for the low bias and to evaluate the acceptance criteria.

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

A-9

TABLE A-5. In-House "Blank" Samples Concentrationa b c Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityd Criteria (4.66 s)

SPW-5449 Water 1/7/2019 Gr. Alpha 0.76 -0.30 +/- 0.52 2 SPW-5449 Water 1/7/2019 Gr. Beta 0.42 0.19 +/- 0.31 4 SPW-34 Water 1/7/2019 I-131 0.36 0.13 +/- 0.18 1 SPW-60 Water 11/5/2018 Ra-226 0.03 0.15 +/- 0.03 2 SPW-119 Water 1/14/2019 H-3 148 42 +/- 80 200 SPW-177 Water 1/16/2019 Ra-228 0.93 -0.10 +/- 0.42 2 SPW-198 Water 1/18/2019 Sr-89 0.67 0.25 +/- 0.50 5 SPW-198 Water 1/18/2019 Sr-90 0.67 -0.16 +/- 0.29 1 SPW-249 Water 1/24/2019 Ni-63 67 31 +/- 41 200 SPW-255 Water 1/15/2019 Ra-226 0.04 0.16 +/- 0.03 2 SPW-280 Water 1/25/2019 Ra-226 0.06 -0.09 +/- 0.14 2 SPW-399 Water 1/31/2019 Ra-226 0.03 0.15 +/- 0.03 2 SPW-460 Water 2/12/2019 Ra-226 0.03 0.15 +/- 0.02 2 SPW-567 Water 2/21/2019 Ra-226 0.03 0.13 +/- 0.02 2 SPW-844 Water 3/22/2019 U-234 0.19 0.04 +/- 0.14 1 SPW-844 Water 3/22/2019 U-238 0.19 0.00 +/- 0.11 1 SPW-836 Water 3/21/2019 Ra-228 0.74 0.53 +/- 0.41 2 SPW-1060 Water 3/31/2019 Ra-226 0.04 -0.02 +/- 0.03 2 SPW-1090 Water 4/10/2019 H-3 155 -14 +/- 72 200 SPW-1092 Water 4/8/2019 Ra-228 0.82 0.75 +/- 0.46 2 SPW-1266 Water 4/16/2019 H-3 152 67 +/- 74 200 SPW-1338 Water 4/18/2019 H-3 152 66 +/- 79 200 SPW-1386 Water 4/8/2019 Ra-226 0.03 0.09 +/- 0.03 2 SPW-1426 Water 4/26/2019 H-3 156 34 +/- 75 200 SPW-1536 Water 5/6/2019 Sr-89 0.66 -0.07 +/- 0.45 5 SPW-1536 Water 5/6/2019 Sr-90 0.59 -0.10 +/- 0.26 1 SPW-1581 Water 5/9/2019 H-3 147 73 +/- 77 200 SPW-1644 Water 4/22/2019 Ra-226 0.02 0.15 +/- 0.02 2 SPW-1675 Water 5/17/2019 H-3 154 -30 +/- 71 200 SPW-1798 Water 5/20/2019 H-3 149 24 +/- 73 200 SPW-1857 Water 5/28/2019 H-3 150 54 +/- 74 200 SPW-1889 Water 5/30/2019 H-3 152 45 +/- 73 200 SPW-2013 Water 5/31/2019 Ra-226 0.01 0.13 +/- 0.02 2 SPW-2029 Water 6/12/2019 Ni-63 66 10 +/- 40 200 SPW-2092 Water 6/18/2019 H-3 154 -42 +/- 70 200 SPW-2237 Water 6/26/2019 H-3 150 -9 +/- 69 200 SPW-2107 Water 6/18/2019 I-131 0.16 0.04 +/- 0.09 1 SPW-2152 Water 6/19/2019 I-131 0.16 0.04 +/- 0.09 1 A-10

TABLE A-5. In-House "Blank" Samples Concentrationa b c Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityd Criteria (4.66 s)

SPW-3187 Water 7/30/2019 Ra-226 0.02 0.17 +/- 0.02 2 SPW-2924 Water 8/6/2019 Sr-89 0.71 -0.06 +/- 0.57 5 SPW-2924 Water 8/6/2019 Sr-90 0.59 0.08 +/- 0.28 1 SPW-2946 Water 8/9/2019 H-3 152 33 +/- 72 200 SPW-3002 Water 8/14/2019 H-3 152 -22 +/- 74 200 SPW-3150 Water 8/26/2019 H-3 151 115 +/- 77 200 SPW-3358 Water 8/30/2019 Gr. Alpha 0.44 -0.08 +/- 0.30 2 SPW-3358 Water 8/30/2019 Gr. Beta 0.72 -0.31 +/- 0.49 4 SPW-3568 Water 8/28/2019 Ra-226 0.03 0.16 +/- 0.03 2 SPW-3322 Water 9/6/2019 Ra-228 0.82 0.46 +/- 0.43 2 SPW-3348 Water 9/10/2019 H-3 150 107 +/- 76 200 SPW-3409 Water 9/13/2019 H-3 154 133 +/- 79 200 SPW-3449 Water 9/17/2019 H-3 147 102 +/- 79 200 SPW-3570 Water 9/27/2019 H-3 151 70 +/- 77 200 SPW-3614 Water 10/1/2019 Ra-228 1.29 1.03 +/- 0.73 2 SPW-3705 Water 10/8/2019 H-3 147 107 +/- 77 200 SPW-4238 Water 10/30/2019 Ra-228 0.99 0.58 +/- 0.52 2 SPW-4253 Water 11/8/2019 H-3 151 80 +/- 76 200 SPW-4367 Water 11/14/2019 H-3 154 42 +/- 74 200 SPW-4369 Water 10/30/2016 Ra-226 0.03 0.14 +/- 0.03 2 SPW-4471 Water 11/21/2019 H-3 155 81 +/- 77 200 SPW-4474 Water 11/21/2019 C-14 12 0 +/-7 200 SPW-4476 Water 11/22/2019 Sr-89 0.62 0.23 +/- 0.45 5 SPW-4476 Water 11/22/2019 Sr-90 0.57 -0.16 +/- 0.24 1 SPW-4601 Water 12/5/2019 H-3 155 28 +/- 74 200 SPW-4635 Water 12/9/2019 Tc-99 12 -6 +/-7 20 SPW-4662 Water 12/17/2019 Ra-228 0.77 0.55 +/- 0.42 2 SPW-4687 Water 12/13/2019 H-3 150 143 +/- 78 200 SPW-4733 Water 11/15/2019 Ra-226 0.03 0.13 +/- 0.03 2 SPW-4742 Water 12/5/2019 Ra-226 0.04 0.10 +/- 0.10 2 SPW-4744 Water 12/19/2019 H-3 151 119 +/- 81 200 SPW-4888 Water 12/19/2019 Ra-226 0.03 0.15 +/- 0.02 2 SPW-4898 Water 1/3/2020 H-3 159 19 +/- 78 200 a

Liquid sample results are reported in pCi/Liter, air filters ( pCi/m 3), charcoal (pCi/charcoal canister), and solid samples (pCi/g).

b Laboratory codes : W & SPW (Water), MI (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c I-131(G); iodine-131 as analyzed by gamma spectroscopy.

d Activity reported is a net activity result.

A-11

TABLE A-6. In-House "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance AP-5499,5500 1/2/2019 Fe-55 941 +/- 220 1027 +/- 226 984 +/- 158 Pass AP-5499,5500 1/2/2019 Sr-89 20.2 +/- 7.3 14.9 +/- 5.7 17.5 +/- 4.7 Pass AP-5499,5500 1/2/2019 Ni-63 12.1 +/- 8.5 15.6 +/- 8.5 13.8 +/- 6.0 Pass CF-20,21 1/2/2019 Gr. Beta 10.0 +/- 0.2 10.7 +/- 0.2 10.3 +/- 0.2 Pass CF-20,21 1/2/2019 Sr-90 0.005 +/- 0.002 0.005 +/- 0.002 0.005 +/- 0.001 Pass CF-20,21 1/2/2019 Be-7 0.27 +/- 0.09 0.29 +/- 0.08 0.28 +/- 0.06 Pass CF-20,21 1/2/2019 K-40 6.69 +/- 0.34 6.83 +/- 0.34 6.76 +/- 0.24 Pass SG-211,212 1/21/2019 Ra-226 7.94 +/- 1.15 8.50 +/- 1.11 9.79 +/- 0.19 Pass SG-211,212 1/21/2019 Ac-228 4.46 +/- 0.37 4.63 +/- 0.43 4.55 +/- 0.28 Pass WW-324,325 2/4/2019 Gr. Alpha 0.68 +/- 0.44 0.49 +/- 0.46 0.59 +/- 0.32 Pass WW-324,325 2/4/2019 Gr. Beta 1.80 +/- 0.55 2.95 +/- 0.63 2.37 +/- 0.42 Pass W-345,346 2/4/2019 H-3 245 +/- 84 277 +/- 85 261 +/- 60 Pass WW-797,798 3/5/2019 H-3 165 +/- 80 222 +/- 83 193 +/- 58 Pass WW-648,649 3/8/2019 H-3 587 +/- 101 630 +/- 102 608 +/- 72 Pass SW-713,714 3/14/2019 H-3 326 +/- 90 254 +/- 86 290 +/- 62 Pass AP-1241,1242 4/2/2019 Be-7 0.097 +/- 0.018 0.108 +/- 0.020 0.103 +/- 0.013 Pass AP-1285,1286 4/3/2019 Be-7 0.080 +/- 0.014 0.078 +/- 0.012 0.079 +/- 0.009 Pass AP-1306,1307 4/3/2019 Be-7 0.085 +/- 0.009 0.096 +/- 0.011 0.090 +/- 0.007 Pass AP-1327,1328 4/3/2019 Be-7 0.078 +/- 0.010 0.079 +/- 0.011 0.078 +/- 0.007 Pass AP-1327,1328 4/3/2019 K-40 0.012 +/- 0.007 0.021 +/- 0.010 0.017 +/- 0.006 Pass AP-2119,2120 4/3/2019 Be-7 0.276 +/- 0.098 0.265 +/- 0.116 0.270 +/- 0.076 Pass AP-2225,2226 4/3/2019 Be-7 0.231 +/- 0.128 0.208 +/- 0.123 0.220 +/- 0.089 Pass CF-820,821 4/3/2019 K-40 6.39 +/- 0.30 6.63 +/- 0.37 6.51 +/- 0.24 Pass WW-648,649 4/5/2019 H-3 587 +/- 101 630 +/- 102 608 +/- 72 Pass WW-1043,1044 4/5/2019 H-3 666 +/- 121 662 +/- 121 664 +/- 86 Pass SW-1087,1088 4/8/2019 H-3 9,997 +/- 300 10,330 +/- 305 10,164 +/- 214 Pass WW-1198,1199 4/9/2019 H-3 562 +/- 99 640 +/- 102 601 +/- 71 Pass LW-1503,1504 4/25/2019 Gr. Beta 1.09 +/- 0.55 1.46 +/- 0.57 1.27 +/- 0.39 Pass WW-1789,1790 5/7/2019 H-3 366 +/- 90 400 +/- 92 383 +/- 64 Pass SG-2269,2270 5/7/2019 Pb-214 39.1 +/- 0.5 40.3 +/- 0.5 39.7 +/- 0.4 Pass SG-2269,2270 5/7/2019 Ac-228 53.2 +/- 1.0 57.1 +/- 1.0 55.2 +/- 0.7 Pass DW-10049,10050 5/7/2019 Ra-226 1.31 +/- 0.13 1.66 +/- 0.15 1.49 +/- 0.10 Pass DW-10049,10050 5/7/2019 Ra-228 1.24 +/- 0.52 1.33 +/- 0.53 1.29 +/- 0.37 Pass WW-1690A,B 5/8/2019 H-3 325 +/- 89 303 +/- 93 314 +/- 64 Pass S-1812,1813 5/16/2019 K-40 22.0 +/- 0.9 23.3 +/- 1.0 22.6 +/- 0.7 Pass S-1812,1813 5/16/2019 Cs-137 0.05 +/- 0.03 0.07 +/- 0.04 0.06 +/- 0.02 Pass DW-10053,10054 5/22/2019 Gr. Alpha 0.93 +/- 0.63 1.14 +/- 0.72 1.04 +/- 0.48 Pass DW-10053,10054 5/22/2019 Gr. Beta 1.43 +/- 0.62 1.13 +/- 0.59 1.28 +/- 0.43 Pass W-2053,2054 5/29/2019 H-3 1572 +/- 135 1470 +/- 131 1521 +/- 94 Pass A-12

TABLE A-6. In-House "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance G-1989,1990 6/3/2019 Be-7 0.80 +/- 0.18 0.72 +/- 0.15 0.76 +/- 0.12 Pass G-1989,1990 6/3/2019 K-40 6.15 +/- 0.51 5.98 +/- 0.46 6.07 +/- 0.34 Pass G-1989,1990 6/3/2019 Gr. Beta 7.24 +/- 0.19 7.00 +/- 0.19 7.12 +/- 0.13 Pass WW-2204,2205 6/6/2019 H-3 3861 +/- 194 3722 +/- 191 3792 +/- 136 Pass S-2031,2032 6/10/2019 Pb-214 5.16 +/- 0.19 4.75 +/- 0.22 4.96 +/- 0.15 Pass S-2031,2032 6/10/2019 Ac-228 3.81 +/- 0.31 3.63 +/- 0.33 3.72 +/- 0.23 Pass S-2010,2011 6/10/2019 Pb-214 1.48 +/- 0.10 1.05 +/- 0.11 1.27 +/- 0.07 Pass F-2140,2141 6/12/2019 K-40 1.01 +/- 0.28 1.39 +/- 0.32 1.20 +/- 0.21 Pass S-2162,2163 6/12/2019 Pb-214 0.65 +/- 0.06 0.54 +/- 0.05 0.60 +/- 0.04 Pass S-2162,2163 6/12/2019 Ac-228 0.46 +/- 0.10 0.44 +/- 0.08 0.45 +/- 0.07 Pass S-2162,2163 6/12/2019 K-40 4.22 +/- 0.49 3.81 +/- 0.41 4.02 +/- 0.32 Pass S-2162,2163 6/12/2019 Tl-208 0.09 +/- 0.02 0.10 +/- 0.02 0.09 +/- 0.01 Pass S-2162,2163 6/12/2019 Pb-212 0.34 +/- 0.03 0.26 +/- 0.03 0.30 +/- 0.02 Pass SWT-2355,2356 6/25/2019 Gr. Beta 1.12 +/- 0.57 1.24 +/- 0.56 1.18 +/- 0.40 Pass AP-2689,2690 6/28/2019 Be-7 0.089 +/- 0.020 0.075 +/- 0.018 0.082 +/- 0.013 Pass AP-2710,2711 7/1/2019 Be-7 0.091 +/- 0.010 0.097 +/- 0.010 0.094 +/- 0.007 Pass AP-2731,2732 7/2/2019 Be-7 0.073 +/- 0.013 0.072 +/- 0.011 0.072 +/- 0.009 Pass DW-10062,10063 7/5/2019 Ra-226 4.10 +/- 0.30 4.03 +/- 0.30 4.07 +/- 0.21 Pass DW-10062,10063 7/5/2019 Ra-228 1.95 +/- 0.60 2.31 +/- 0.62 2.13 +/- 0.43 Pass AP-70818,70819 7/8/2019 Gr. Beta 0.021 +/- 0.004 0.023 +/- 0.004 0.022 +/- 0.003 Pass XW-2459,2460 7/10/2019 H-3 304 +/- 92 234 +/- 89 269 +/- 64 Pass VE-2516,2517 7/10/2019 Be-7 0.63 +/- 0.16 0.52 +/- 0.19 0.58 +/- 0.12 Pass VE-2516,2517 7/10/2019 K-40 6.50 +/- 0.47 6.81 +/- 0.54 6.66 +/- 0.36 Pass AP-71518A,B 7/15/2019 Gr. Beta 0.022 +/- 0.004 0.025 +/- 0.004 0.023 +/- 0.003 Pass VE-2668,2669 7/16/2019 K-40 3.84 +/- 0.27 3.74 +/- 0.26 3.79 +/- 0.19 Pass DW-10076,10077 7/16/2019 Gr. Alpha 3.01 +/- 0.92 4.13 +/- 0.91 3.57 +/- 0.65 Pass DW-10073,10074 7/16/2019 Ra-226 1.57 +/- 0.18 1.51 +/- 0.21 1.54 +/- 0.14 Pass DW-10073,10074 7/16/2019 Ra-228 1.29 +/- 0.56 1.48 +/- 0.57 1.385 +/- 0.40 Pass AP-72218A,B 7/22/2019 Gr. Beta 0.013 +/- 0.004 0.016 +/- 0.004 0.015 +/- 0.003 Pass G-2752,2753 7/23/2019 K-40 4.53 +/- 0.42 4.47 +/- 0.46 4.50 +/- 0.31 Pass G-2752,2753 7/23/2019 Be-7 1.98 +/- 0.29 1.96 +/- 0.29 1.97 +/- 0.20 Pass AP-2800,2801 7/25/2019 Be-7 0.208 +/- 0.090 0.321 +/- 0.147 0.264 +/- 0.086 Pass AP-72918A,B 7/29/2019 Gr. Beta 0.026 +/- 0.005 0.025 +/- 0.005 0.025 +/- 0.003 Pass VE-2840,2841 7/31/2019 K-40 3.94 +/- 0.38 3.99 +/- 0.47 3.96 +/- 0.30 Pass AP-2903,2904 8/1/2019 Be-7 0.198 +/- 0.102 0.228 +/- 0.102 0.213 +/- 0.072 Pass P-2882,2983 8/1/2019 H-3 265 +/- 85 327 +/- 88 296 +/- 61 Pass SG-2926,2927 8/5/2019 Pb-214 9.07 +/- 0.39 8.82 +/- 0.39 8.95 +/- 0.28 Pass SG-2926,2927 8/5/2019 Ac-228 9.00 +/- 0.76 8.58 +/- 0.72 8.79 +/- 0.52 Pass AV-2993,2994 8/9/2019 Gr. Beta 1.22 +/- 0.19 1.28 +/- 0.21 1.25 +/- 0.14 Pass AV-2993,2994 8/9/2019 K-40 3.12 +/- 0.36 3.14 +/- 0.35 3.13 +/- 0.25 Pass A-13

TABLE A-6. In-House "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance DW-10088,10089 8/9/2019 Ra-228 0.60 +/- 0.50 1.20 +/- 0.50 0.90 +/- 0.35 Pass DW-10088,10089 8/9/2019 Ra-226 1.40 +/- 0.20 0.94 +/- 0.20 1.17 +/- 0.14 Pass VE-3016,3017 8/12/2019 Be-7 0.39 +/- 0.12 0.47 0.28 0.43 0.15 Pass VE-3016,3017 8/12/2019 K-40 6.13 +/- 0.41 6.24 0.64 6.18 0.38 Pass G-3600,3601 8/12/2019 Be-7 4.42 +/- 0.33 4.35 0.27 4.39 0.21 Pass WW-3100,3101 8/14/2019 H-3 480 +/- 96 401 +/- 92 441 +/- 66 Pass MI-3211,3212 8/27/2019 K-40 1862 +/- 131 1923 +/- 136 1893 +/- 94 Pass MI-3211,3212 8/27/2019 Sr-90 0.90 +/- 0.33 0.56 +/- 0.29 0.73 +/- 0.22 Pass LW-3512,3513 8/30/2019 Gr. Beta 0.79 +/- 0.50 1.39 +/- 0.58 1.09 +/- 0.38 Pass DW-10100,10101 9/5/2019 Ra-226 0.50 +/- 0.11 0.57 0.12 0.54 +/- 0.08 Pass DW-10100,10101 9/5/2019 Ra-228 3.38 +/- 0.82 2.54 1.03 2.96 +/- 0.66 Pass DW-10111,10112 9/23/2019 Gr. Alpha 1.72 +/- 0.73 1.41 0.68 1.57 +/- 0.50 Pass DW-10115,10116 9/25/2019 Ra-228 3.65 +/- 0.80 2.76 0.68 3.21 +/- 0.52 Pass DW-10115,10116 9/25/2019 Ra-226 2.99 +/- 0.23 2.74 0.25 2.87 +/- 0.17 Pass WW-3793,3794 10/8/2019 Gr. Beta 3.75 +/- 1.18 4.34 1.20 4.05 +/- 0.84 Pass BS-3879,3880 10/9/2019 Pb-214 0.60 +/- 0.03 0.65 +/- 0.05 0.63 +/- 0.03 Pass BS-3879,3880 10/9/2019 Ra-226 1.27 +/- 0.14 1.15 +/- 0.14 1.21 +/- 0.10 Pass BS-3879,3880 10/9/2019 K-40 11.05 +/- 0.29 10.69 +/- 0.30 10.87 +/- 0.21 Pass BS-3879,3880 10/9/2019 Pb-212 0.58 +/- 0.02 0.55 +/- 0.02 0.56 +/- 0.01 Pass BS-3879,3880 10/9/2019 Tl-208 0.21 +/- 0.02 0.21 +/- 0.01 0.21 +/- 0.01 Pass BS-3879,3880 10/9/2019 Bi-212 0.75 +/- 0.17 0.62 +/- 0.17 0.68 +/- 0.12 Pass BS-3879,3880 10/9/2019 Bi-214 0.57 +/- 0.02 0.52 +/- 0.06 0.54 +/- 0.03 Pass BS-4161,4162 10/29/2019 K-40 15.3 +/- 0.6 15.3 +/- 0.7 15.3 +/- 0.5 Pass BS-4161,4162 10/29/2019 Ra-226 2.16 +/- 0.35 2.27 +/- 0.78 2.22 +/- 0.43 Pass DW-10126,10127 10/22/2019 Ra-228 0.85 +/- 0.58 1.19 +/- 0.62 1.02 +/- 0.42 Pass DW-10129,10130 10/22/2019 Gr. Alpha 1.44 +/- 0.96 3.06 +/- 0.95 2.25 +/- 0.68 Pass SG-4071 10/22/2019 Ac-228 2.10 +/- 0.16 2.16 +/- 0.20 2.13 +/- 0.13 Pass SPSG-4071,4072 10/22/2019 Pb-214 1.61 +/- 0.10 1.29 +/- 0.08 1.45 +/- 0.06 Pass SS-3900,3901 10/15/2019 Bi-212 0.29 +/- 0.14 0.19 +/- 0.12 0.24 +/- 0.09 Pass WW-4291,4292 11/5/2019 H-3 481 +/- 97 528 +/- 97 505 +/- 68 Pass DW-10139,10140 11/6/2019 Ra-228 2.61 +/- 0.62 2.26 +/- 0.63 2.44 +/- 0.44 Pass DW-10139,10140 11/6/2019 Ra-226 1.49 +/- 0.17 1.32 +/- 0.19 1.41 +/- 0.13 Pass WW-4270,4271 11/6/2019 H-3 112 +/- 78 165 +/- 81 139 +/- 56 Pass S-4312,4313 11/7/2019 K-40 20.2 +/- 0.8 23.0 +/- 0.9 21.6 +/- 0.6 Pass AP-4379,4380 11/12/2019 Be-7 0.133 +/- 0.075 0.134 +/- 0.073 0.134 +/- 0.052 Pass S-4422,4223 11/13/2019 Pb-214 1.22 +/- 0.09 1.28 +/- 0.10 1.25 +/- 0.07 Pass S-4422,4423 11/13/2019 Ac-228 1.14 +/- 0.15 1.21 +/- 0.17 1.18 +/- 0.11 Pass WW-4556,4557 11/13/2019 H-3 438 +/- 96 482 +/- 98 460 +/- 69 Pass SO-5024,5025 11/14/2019 K-40 6.60 +/- 0.54 6.26 +/- 0.58 6.43 +/- 0.40 Pass MI-4443,4444 11/18/2019 K-40 1304 +/- 114 1340 +/- 109 1322 +/- 79 Pass A-14

TABLE A-6. In-House "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance SW-4492,4493 11/19/2019 H-3 188 +/- 87 264 +/- 97 226 +/- 65 Pass WW-4577,4578 11/21/2019 H-3 212 +/- 83 232 +/- 84 222 +/- 59 Pass AP-4514,4515 11/21/2019 Be-7 0.130 +/- 0.055 0.193 +/- 0.112 0.162 +/- 0.062 Pass SWT-4598,4599 11/26/2019 Gr. Beta 1.43 +/- 0.57 1.14 +/- 0.54 1.28 +/- 0.39 Pass AP-120218A,B 12/2/2019 Gr. Beta 0.009 +/- 0.004 0.013 +/- 0.004 0.011 +/- 0.003 Pass S-4644,4645 12/4/2019 Pb-214 1.01 +/- 0.09 0.91 +/- 0.09 0.96 +/- 0.06 Pass S-4644,4645 12/4/2019 Ac-228 0.85 +/- 0.15 0.96 +/- 0.16 0.91 +/- 0.11 Pass AP-121618A,B 12/16/2019 Gr. Beta 0.028 +/- 0.005 0.030 +/- 0.005 0.029 +/- 0.003 Pass S-4735,4736 12/16/2019 Pb-214 9.33 +/- 0.38 9.45 +/- 0.27 9.39 +/- 0.23 Pass S-4735,4736 12/16/2019 Ac-228 13.4 +/- 0.7 14.9 +/- 0.7 14.1 +/- 0.5 Pass AP-122318A,B 12/23/2019 Gr. Beta 0.034 +/- 0.005 0.035 +/- 0.005 0.035 +/- 0.003 Pass AP-123018A,B 12/30/2019 Gr. Beta 0.037 +/- 0.005 0.037 +/- 0.005 0.037 +/- 0.004 Pass Note: Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

a Results are reported in units of pCi/L, except for air filters (pCi/Filter or pCi/m3), food products, vegetation, soil and sediment (pCi/g).

b CH (Charcoal Canister), DW (Drinking Water), E (Egg), F (Fish), G (Grass), LW (Lake Water), P (Precipitation),

PM (Powdered Milk), S, (Solid), SG (Sludge), SO (Soil), SS (Shoreline Sediment), SW (Surface Water),

SWT (Surface Water Treated), SWU (Surface Water Untreated), VE (Vegetation), W Water (Water), WW (Well Water).

A-15

TABLE A-7. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP).

Concentrationa Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-609 2/1/2019 Gross Alpha 0.16 +/- 0.03 0.528 0.158 - 0.898 Pass MAAP-609 2/1/2019 Gross Beta 1.09 +/- 0.07 0.948 0.474 - 1.422 Pass MAW-550 2/1/2019 Gross Alpha 0.73 +/- 0.06 0.84 0.25 - 1.43 Pass MAW-550 2/1/2019 Gross Beta 2.26 +/- 0.06 2.33 1.17 - 3.50 Pass MASO-605 2/1/2019 Am-241 38.89 +/- 5.92 49.9 34.9 +/- 64.9 Pass MASO-605 2/1/2019 Cs-134 0.45 +/- 2.52 0.0 NA c Pass MASO-605 2/1/2019 Cs-137 1273.1 +/- 13.0 1164 815 - 1513 Pass MASO-605 2/1/2019 Co-57 0.46 +/- 1.1 0.0 NA c Pass MASO-605 2/1/2019 Co-60 857.96 +/- 8.52 855.0 599 - 1112 Pass MASO-605 2/1/2019 Mn-54 1,138.0 +/- 13.5 1027 719 - 1335 Pass MASO-605 2/1/2019 Zn-65 730.92 +/- 16.48 668 468 - 868 Pass MASO-605 2/1/2019 K-40 676 +/- 47 585 410 - 761 Pass MASO-605 2/1/2019 Sr-90 0.0007 +/- 0.0007 0.000 NA c Pass MASO-605 2/1/2019 Pu-238 78.15 +/- 6.11 71.0 49.7 - 92.3 Pass MASO-605 2/1/2019 Pu-239/240 65.00 +/- 5.4 59.8 41.9 - 77.7 Pass MASO-605 2/1/2019 U-234 65 +/- 13 56 39 - 73 Pass MASO-605 2/1/2019 U-238 237 +/- 23 205 144 - 267 Pass MAW-613 2/1/2019 Am-241 0.46 +/- 0.03 0.582 0.407 - 0.757 Pass MAW-613 2/1/2019 Cs-134 5.49 +/- 0.18 5.99 4.19 - 7.79 Pass MAW-613 2/1/2019 Cs-137 0.089 +/- 0.080 0 NA c Pass MAW-613 2/1/2019 Co-57 10.87 +/- 0.24 10.00 7.0 - 13.0 Pass MAW-613 2/1/2019 Co-60 6.78 +/- 0.19 6.7 4.7 - 8.7 Pass MAW-613 2/1/2019 Mn-54 8.98 +/- 0.17 8.4 5.9 - 10.9 Pass MAW-613 2/1/2019 Zn-65 0.096 +/- 0.141 0 NA c Pass MAW-613 2/1/2019 Fe-55 0.004 +/- 4.00 0 NA c Pass MAW-613 2/1/2019 Ni-63 5.54 +/- 1.52 5.8 4.1 - 7.5 Pass MAW-613 2/1/2019 Sr-90 6.02 +/- 0.53 6.35 4.45 - 8.26 Pass MAW-613 2/1/2019 Pu-238 0.315 +/- 0.088 0.451 0.316 - 0.586 Faile MAW-613 2/1/2019 Pu-239/240 0.07 +/- 0.07 0.005 NA d Pass MAW-613 2/1/2019 U-234 0.96 +/- 0.07 0.800 0.56 +/- 1.04 Pass MAW-613 2/1/2019 U-238 0.94 +/- 0.07 0.810 0.57 +/- 1.05 Pass MAAP-611 2/1/2019 Cs-134 0.185 +/- 0.025 0.216 0.151 - 0.281 Pass MAAP-611 2/1/2019 Cs-137 0.288 +/- 0.045 0.290 0.203 - 0.377 Pass MAAP-611 2/1/2019 Co-57 0.369 +/- 0.033 0.411 0.288 - 0.534 Pass MAAP-611 2/1/2019 Co-60 0.333 +/- 0.045 0.340 0.238 - 0.442 Pass MAAP-611 2/1/2019 Mn-54 0.546 +/- 0.058 0.547 0.383 - 0.711 Pass MAAP-611 2/1/2019 Zn-65 0.025 +/- 0.0348 0 NA c Pass MAAP-611 2/1/2019 Sr-90 1.34 +/- 0.13 0.662 0.463 - 0.861 Failf MAAP-611 2/1/2019 U-234 4.14 +/- 0.97 0.106 0.074 - 0.138 Failf MAAP-611 2/1/2019 U-238 3.89 +/- 0.94 0.110 0.077 - 0.143 Failf MAW-601 2/1/2019 I-129 0.56 +/- 0.08 0.616 0.431 - 0.801 Pass A-16

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

Concentrationa Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAVE-607 2/1/2019 Cs-134 2.33 +/- 0.10 2.44 1.71 - 3.17 Pass MAVE-607 2/1/2019 Cs-137 2.62 +/- 0.13 2.30 1.61 - 2.99 Pass MAVE-607 2/1/2019 Co-57 2.39 +/- 0.11 2.07 1.45 - 2.69 Pass MAVE-607 2/1/2019 Co-60 0.046 +/- 0.04 0 NA c Pass MAVE-607 2/1/2019 Mn-54 0.031 +/- 0.04 0 NA c Pass MAVE-607 2/1/2019 Sr-90 0.013 +/- 0.022 0 NA c Pass MAAP-3299 8/1/2019 Gross Alpha 0.13 +/- 0.03 0.528 0.158 - 0.898 Failg MAAP-3299 8/1/2019 Gross Beta 1.06 +/- 0.07 0.937 0.469 - 1.406 Pass MAW-3252 8/1/2019 Gross Alpha 0.93 +/- 0.06 1.06 0.32 - 1.80 Pass MAW-3252 8/1/2019 Gross Beta 3.03 +/- 0.07 3.32 1.66 - 4.98 Pass MASO-3297 8/19/2019 Cs-134 881.98 +/- 9.03 1020 714 - 1326 Pass MASO-3297 8/19/2019 Cs-137 871.50 +/- 10.83 789 552 - 1026 Pass MASO-3297 8/19/2019 Co-57 -1.72 +/- 3.01 0 NA c Pass MASO-3297 8/19/2019 Co-60 783.69 +/- 8.21 760 532 - 988 Pass MASO-3297 8/19/2019 Mn-54 834.48 +/- 11.29 745 522 - 969 Pass MASO-3297 8/19/2019 Zn-65 -3.01 +/- 5.27 0 NA c Pass MASO-3297 8/19/2019 K-40 662.91 +/- 42.65 555 389 - 722 Pass MAW-3240 8/1/2019 Cs-134 -0.08 +/- 0.06 0 NA c Pass MAW-3240 8/1/2019 Cs-137 18.48 +/- 0.90 18.4 12.9 - 23.9 Pass MAW-3240 8/1/2019 Co-57 14.68 +/- 0.52 15.6 10.9 - 20.3 Pass MAW-3240 8/1/2019 Co-60 8.67 +/- 0.39 8.8 6.2 - 11.4 Pass MAW-3240 8/1/2019 Mn-54 20.72 +/- 0.93 20.6 14.4 - 26.8 Pass MAW-3240 8/1/2019 Zn-65 20.52 +/- 1.05 20.3 14.200 - 26.400 Pass MAW-3240 8/1/2019 K-40 5.11 +/- 0.68 0 NA c Fail MAW-3240 8/1/2019 H-3 179.52 +/- 3.32 175 123 - 228 Pass MAW-3240 8/1/2019 U-234 1.11 +/- 0.04 1.07 0.75 - 1.39 Pass MAW-3240 8/1/2019 U-238 1.08 +/- 0.04 1.05 0.74 - 1.37 Pass MAVE-3295 8/1/2019 Cs-134 0.02 +/- 0.02 0 NA c Pass MAVE-3295 8/1/2019 Cs-137 3.38 +/- 0.32 3.28 2.30 - 4.26 Pass MAVE-3295 8/1/2019 Co-57 4.99 +/- 0.51 4.57 3.20 - 5.94 Pass MAVE-3295 8/1/2019 Co-60 5.29 +/- 0.39 5.30 3.71 - 6.89 Pass MAVE-3295 8/1/2019 Mn-54 4.73 +/- 0.45 4.49 3.14 - 5.84 Pass MAVE-3295 8/1/2019 Zn-65 3.10 +/- 0.31 2.85 2.00 - 3.71 Pass a

Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

b Laboratory codes as follows: MAW (water), MAAP (air filter), MASO (soil) and MAVE (vegetation).

c MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP. A known value of "zero" indicates an analysis was included in the testing series as a "false positive". MAPEP does not provide control limits.

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

e Past results have been acceptable so will watch to see if a trend develops.

f An erroneous volume conversion caused some incorrect values to be submitted. If the conversion had been performed properly the results in Bq/sample would have been (Sr-90: 0.671 +/- 0.066 ) and (U-234: 0.153 +/- 0.036) and (U-238: 0.144 +/- 0.035).

This result had been included in the Uranium investigation. See footnote "C" on Table A-1.

g The lab will adopt a MAPEP specific gross alpha/beta filter calibration as discussed in the MAPEP test instructions.

Utilizing a MAPEP specific calibration, the result in Bq/sample ( 0.39 +/- 0.09 Bq/total) which passes the MAPEP acceptance criteria.

A-17

TABLE A-8. Interlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA) a.

MRAD-30 Study Concentration a Lab Code b Date Analysis Laboratory ERA Control Result Value c Limits d Acceptance ERAP-846 3/18/2019 Am-241 19.1 18.7 13.3 - 24.9 Pass ERAP-846 3/18/2019 Cs-134 612 721 468 - 884 Pass ERAP-846 3/18/2019 Cs-137 679 634 521 - 832 Pass ERAP-846 3/18/2019 Co-60 93.7 93.8 79.7 - 119 Pass ERAP-846 3/18/2019 Fe-55 612 718 262 - 1150 Pass ERAP-846 3/18/2019 Mn-54 < 0.5 < 50.0 0.00 - 50.0 Pass ERAP-846 3/18/2019 Zn-65 1500 1380 1130 - 2110 Pass ERAP-846 3/18/2019 Pu-238 34.0 33.8 25.5 - 41.5 Pass ERAP-846 3/18/2019 Pu-239 64.9 67.0 50.1 - 80.8 Pass ERAP-846 3/18/2019 Sr-90 199 181 114 - 246 Pass ERAP-846 3/18/2019 U-234e 29.0 18.2 13.5 - 21.3 Fail ERAP-846 3/18/2019 U-238e 28.6 18.1 13.7 - 21.6 Fail ERAP-848 3/18/2019 Gross Alpha 48.4 50.3 26.3 - 82.9 Pass ERAP-848 3/18/2019 Gross Beta 95.5 78.6 47.7 - 119 Pass a

Results obtained by Environmental, Inc., Midwest Laboratory (EIML) as a participant in the crosscheck program for proficiency testing administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory code ERAP (air filter). Results are reported in units of (pCi/Filter).

c The ERA Assigned values for the air filter standards are equal to 100% of the parameter present in the standard as determined by the gravimetric and/or volumetric measurements made during standard preparation as applicable.

d The acceptance limits are established per the guidelines contained in the Department of Energy (DOE) report EML-564, Analysis of Environmental Measurements Laboratory (EML) Quality Assessment Program (QAP)

Data Determination of Operational Criteria and Control Limits for Performance Evaluation Purposes or ERA's SOP for the generation of Performance Acceptance Limits.

e Failure traced to an over-estimated U-232 tracer value. Tracer has been re-standardized. (See footnote "c" on Table A-1).

A-18

Appendix B Summary Tables in the format of NRC Radiological Assessment Branch Technical Position Revision 1, November 1979 Page B-1

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2019 Medium of ODCM All Indicator Indicator Location with Control Locations Pathway Analysis and Lower Locations Highest Annual Mean Number of Sampled Total Number of Limit of Name Nonroutine (Unit of Analysis Performed Detection ** Mean (f) Distance and ** Mean (f) ** Mean (f) Reported Measurement) (LLD) ** Range Direction ** Range ** Range Measurements **

Air Particulate Station 53 (pCi/m3) Gross Beta (318) 0.01 0.023 (265/265) 32,37, & 49 0.023 (53/53) 0.023 (53/53) 0 (0.007 - 0.048) 3.1 miles WNW (0.010 - 0.047) (0.007 - 0.042) 2.0 miles NNW 0.8 miles NNE Air Radioiodine (pCi/m3) Gamma (24) - 0.090 (20/20) 2 0.094 (4/4) 0.092 (4/4) 0 Be-7 (0.070 - 0.121) 2.7 miles N (0.071 - 0.121) (0.072 - 0.122)

Station 53 I-131 (318) 0.07 - (0/265) N/A N/A - (0/53) 0 Direct Radiation Stations 39 & 53 Dosimeters (mR per std. Gamma Dose - 18.7 (160/160) 13 18.7 (4/4) 17.1 (8/8) 0 90-day Qtr.) (168) (7.4 - 21.7) 1.6 miles SE (16.7 - 20.5) (12.8 - 20.7)

Surface Water JRR (pCi/l) Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (24) 3,000 10,450 (12/12) SP 10,450 (12/12) - (0/12) 0 (8,867 - 12,331) 3.2 miles SSE (8,867 - 12,331)

Fe-55 (8) - - (0/4) N/A N/A - (0/4) 0 Ground Water B-12 (pCi/l) I-131 (32) 1 - (0/28) N/A N/A - (0/4) 0 Gamma (32) - (0/28) N/A N/A - (0/4) 0 Tritium (32) 2,000 - (0/28) N/A N/A - (0/4) 0 Page B-2

    • Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2019 Medium of ODCM All Indicator Indicator Location with Control Locations Pathway Analysis and Lower Locations Highest Annual Mean Number of Sampled Total Number of Limit of Name Nonroutine (Unit of Analysis Performed Detection ** Mean (f) Distance and ** Mean (f) ** Mean (f) Reported Measurement) (LLD) ** Range Direction ** Range ** Range Measurements **

Drinking BW-15 Water I-131 (24) 1 - (0/12) N/A N/A - (0/12) 0 (pCi/l)

Gross Beta (24) 4 2.2 (12/12) IO-DW 2.2 (12/12) 2.3 (12/12) 0 (0.9 - 2.9) 26.1 miles SSE (0.9 - 2.9) (1.6 - 3.7)

Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (8) 2,000 - (0/4) N/A - (1/4) - (0/4) 0 Shoreline Gamma (4) JRR Sediment (pCi/kg dry) K-40 - 8,152 (2/2) DC 7,306 (2/2) 10,641 (2/2) 0 (5,672 - 8,941) 0.8 miles WNW (5,672 - 8,941) (10,012 - 11,270)

Cs-137 180 196.8 (1/2) DC 196.8 (1/2) 147.7 (1/2) 0 (196.8 - 196.8)) 0.8 miles WNW (196.8 - 196.8)) (147.7 - 147.7)

Fish - Flesh Gamma (28) JRR (pCi/kg wet)

K-40 - 3,792 (11/11) CCL 3,792 (11/11) 3,898 (10/10) 0 (3,213 - 4,478) 0.6 miles E to (3,213 - 4,478) (2,585 - 4,540)

NNW Tritium (28) - 7,465 (11/11) CCL 7,465 (11/11) - (0/10) 0 (5,106 - 9,861) 0.6 miles E to (5,106 - 9,861)

NNW Page B-3

    • Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2019 Medium of ODCM All Indicator Indicator Location with Control Locations Pathway Analysis and Lower Locations Highest Annual Mean Number of Sampled Total Number of Limit of Name Nonroutine (Unit of Analysis Performed Detection ** Mean (f) Distance and ** Mean (f) ** Mean (f) Reported Measurement) (LLD) ** Range Direction ** Range ** Range Measurements **

Food and Gamma (26) D-2 Garden (pCi/kg wet) Be-7 - 1,722 (20/20) H-2 1,893 (6/6) 2,014 (6/6) 0 (722 - 2,903) 3.0 miles SSE (1,499 - 2,903) (963 - 3,357)

K-40 - 6,221 (20/20) A-3 1,599 (3/3) 7,127 (6/6) 0 (4,420 - 8,746) 2.6 miles N (5,087 - 6,901) (3,981 - 9,246)

Crops Gamma (3) NR-D1 (pCi/kg wet)

K-40 - 15,589 (2/2) NR-D2 16,586 (1/1) 13,801 (1/1) 0 (14,592-16,586) 11.5 miles S (16,586-16,586) (13,801 - 13,801)

Bottom Gamma (4) JRR Sediment (pCi/kg dry)

K-40 - 9,945 (2/2) DC 9,945 (2/2) 11,991 (2/2) 0 (9,277 - 12,836) 0.9 miles WNW (9,277 - 12,836) (11,146 - 12,836)

Cs-137 - 39 (1/2) DC 39 (1/2) - (0/2) 0 (39 - 39) 0.9 miles WNW (39 - 39)

Fe-55 (2) - - (0/2) N/A N/A No Control 0 Page B-4

    • Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2019 Medium of ODCM All Indicator Indicator Location with Control Locations Pathway Analysis and Lower Locations Highest Annual Mean Number of Sampled Total Number of Limit of Name Nonroutine (Unit of Analysis Performed Detection ** Mean (f) Distance and ** Mean (f) ** Mean (f) Reported Measurement) (LLD) ** Range Direction ** Range ** Range Measurements **

Aquatic Gamma (3) No Control Vegetation (pCi/kg wet) Be-7 - 124 (3/3) DC 193 (1/1) - 0 (69 - 193) 0.9 miles WNW (193 - 193)

K-40 - 2,363 (3/3) DC 3,125 (1/1) - 0 (1,854 - 3,125) 0.9 miles WNW (3,125 - 3,125)

Cs-137 - - (0/4) N/A N/A - 0 Terrestrial Gamma (2) No Control Vegetation (pCi/kg wet) Be-7 - 3,833 (2/2) MUDS 5,012 (1/1) - 0 (2,654 - 5,012) 1.5 miles WNW (5,012 - 5,012)

K-40 - 6,925 (2/2) EEA 7,704 (1/1) - 0 (6,145 - 7,704) 3.0 miles NNW (7,704 - 7,704)

Soil Gamma (2) No Control (pCi/kg dry)

K-40 - 11,179 (2/2) MUDS 11,791 (1/1) - 0 (10,567-11,791) 1.5 miles WNW (11,791-11,791)

Cs-137 - 116 (2/2) EEA 138 (1/1) - 0 (95 - 138) 3.0 miles NNW (138 - 138)

Deer/Turkey Gamma (2) No Control (pCi/kg wet)

K-40 - 2,816 (2/2) J4.0 2,861(1/1) - 0 (2,771 - 2,861) 4.0 miles S (2,861 - 2,861)

Page B-5

    • Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2019 Medium of ODCM All Indicator Indicator Location with Control Locations Pathway Analysis and Lower Locations Highest Annual Mean Number of Sampled Total Number of Limit of Name Nonroutine (Unit of Analysis Performed Detection ** Mean (f) Distance and ** Mean (f) ** Mean (f) Reported Measurement) (LLD) ** Range Direction ** Range ** Range Measurements **

Tritium - 786 (1/2) A2.0 786 (1/1) No Control 0 2.0 miles N (786 - 786)

Page B-6

    • Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses (f)

APPENDIX C INDIVIDUAL SAMPLE RESULTS 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

Air Particulate Filters and Radioiodine Canisters Location: 002 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 31-Dec-18 07-Jan-19 308 0.032 +/- 0.005 < 0.016 07-Jan-19 15-Jan-19 362 0.017 +/- 0.004 < 0.006 15-Jan-19 22-Jan-19 303 0.021 +/- 0.004 < 0.008 15-Jan-19 22-Jan-19 303 0.021 +/- 0.004 Duplicate 22-Jan-19 28-Jan-19 266 0.020 +/- 0.005 < 0.010 28-Jan-19 04-Feb-19 299 0.022 +/- 0.004 < 0.015 04-Feb-19 11-Feb-19 306 0.025 +/- 0.004 < 0.067 11-Feb-19 18-Feb-19 307 0.034 +/- 0.004 < 0.008 18-Feb-19 25-Feb-19 296 0.029 +/- 0.004 < 0.010 25-Feb-19 04-Mar-19 314 0.033 +/- 0.004 < 0.007 04-Mar-19 11-Mar-19 287 0.020 +/- 0.005 < 0.019 11-Mar-19 18-Mar-19 282 0.013 +/- 0.004 < 0.015 18-Mar-19 25-Mar-19 292 0.022 +/- 0.005 < 0.008 25-Mar-19 01-Apr-19 296 0.022 +/- 0.004 < 0.005 01-Apr-19 08-Apr-19 294 0.023 +/- 0.004 < 0.016 08-Apr-19 15-Apr-19 316 0.021 +/- 0.004 < 0.009 15-Apr-19 22-Apr-19 287 0.019 +/- 0.004 < 0.011 22-Apr-19 29-Apr-19 303 0.016 +/- 0.004 < 0.008 29-Apr-19 06-May-19 296 0.010 +/- 0.004 < 0.007 06-May-19 13-May-19 312 0.011 +/- 0.004 < 0.017 13-May-19 20-May-19 298 0.020 +/- 0.004 < 0.013 20-May-19 28-May-19 316 0.013 +/- 0.004 < 0.013 28-May-19 03-Jun-19 259 0.020 +/- 0.005 < 0.021 03-Jun-19 10-Jun-19 298 0.021 +/- 0.004 < 0.014 10-Jun-19 19-Jun-19 384 0.019 +/- 0.003 < 0.008 19-Jun-19 24-Jun-19 216 0.020 +/- 0.005 < 0.013 24-Jun-19 01-Jul-19 299 0.021 +/- 0.004 < 0.011 01-Jul-19 08-Jul-19 297 0.019 +/- 0.004 < 0.007 08-Jul-19 15-Jul-19 299 0.022 +/- 0.004 < 0.008 15-Jul-19 22-Jul-19 304 0.013 +/- 0.004 < 0.008 22-Jul-19 29-Jul-19 294 0.024 +/- 0.004 < 0.007 29-Jul-19 05-Aug-19 284 0.028 +/- 0.005 < 0.011 05-Aug-19 12-Aug-19 309 0.024 +/- 0.004 < 0.010 12-Aug-19 19-Aug-19 309 0.020 +/- 0.004 < 0.010 19-Aug-19 26-Aug-19 306 0.015 +/- 0.004 < 0.008 26-Aug-19 03-Sep-19 352 0.022 +/- 0.004 < 0.007 03-Sep-19 09-Sep-19 255 0.042 +/- 0.005 < 0.009 09-Sep-19 16-Sep-19 299 0.033 +/- 0.004 < 0.013 16-Sep-19 23-Sep-19 296 0.037 +/- 0.005 < 0.009 23-Sep-19 30-Sep-19 303 0.019 +/- 0.004 < 0.008 30-Sep-19 08-Oct-19 348 0.018 +/- 0.004 < 0.007 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 1

Air Particulate Filters and Radioiodine Canisters Location: 002 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 08-Oct-19 14-Oct-19 254 0.024 +/- 0.005 < 0.011 08-Oct-19 14-Oct-19 254 0.021 +/- 0.005 Duplicate 14-Oct-19 21-Oct-19 299 0.026 +/- 0.005 < 0.012 21-Oct-19 28-Oct-19 307 0.013 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 341 0.023 +/- 0.004 < 0.009 05-Nov-19 11-Nov-19 262 0.024 +/- 0.005 < 0.010 11-Nov-19 18-Nov-19 299 0.021 +/- 0.004 < 0.011 18-Nov-19 25-Nov-19 310 0.025 +/- 0.004 < 0.008 25-Nov-19 02-Dec-19 312 0.012 +/- 0.004 < 0.015 02-Dec-19 09-Dec-19 298 0.029 +/- 0.005 < 0.010 09-Dec-19 16-Dec-19 308 0.030 +/- 0.005 < 0.008 16-Dec-19 23-Dec-19 300 0.032 +/- 0.005 < 0.017 23-Dec-19 30-Dec-19 296 0.037 +/- 0.005 < 0.013 30-Dec-19 07-Jan-20 344 0.019 +/- 0.004 < 0.012 30-Dec-19 07-Jan-20 344 0.020 +/- 0.004 Duplicate 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 2

Air Particulate Filters and Radioiodine Canisters Location: 018 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 31-Dec-18 07-Jan-19 310 0.036 +/- 0.005 < 0.016 07-Jan-19 15-Jan-19 360 0.019 +/- 0.004 < 0.006 15-Jan-19 22-Jan-19 303 0.022 +/- 0.004 < 0.008 22-Jan-19 28-Jan-19 269 0.026 +/- 0.005 < 0.010 28-Jan-19 04-Feb-19 299 0.020 +/- 0.004 < 0.015 28-Jan-19 04-Feb-19 299 0.020 +/- 0.004 Duplicate 04-Feb-19 11-Feb-19 304 0.024 +/- 0.004 < 0.040 11-Feb-19 18-Feb-19 310 0.043 +/- 0.005 < 0.007 18-Feb-19 25-Feb-19 286 0.027 +/- 0.004 < 0.011 25-Feb-19 04-Mar-19 298 0.027 +/- 0.004 < 0.007 04-Mar-19 11-Mar-19 288 0.017 +/- 0.004 < 0.019 11-Mar-19 18-Mar-19 297 0.016 +/- 0.004 < 0.014 11-Mar-19 18-Mar-19 297 0.020 +/- 0.004 Duplicate 18-Mar-19 25-Mar-19 298 0.023 +/- 0.005 < 0.008 18-Mar-19 25-Mar-19 298 0.019 +/- 0.004 Duplicate 25-Mar-19 01-Apr-19 297 0.023 +/- 0.004 < 0.005 01-Apr-19 08-Apr-19 293 0.026 +/- 0.004 < 0.016 08-Apr-19 15-Apr-19 300 0.018 +/- 0.004 < 0.009 15-Apr-19 22-Apr-19 298 0.018 +/- 0.004 < 0.010 22-Apr-19 29-Apr-19 301 0.015 +/- 0.004 < 0.008 22-Apr-19 29-Apr-19 301 0.015 +/- 0.004 Duplicate 29-Apr-19 06-May-19 297 0.014 +/- 0.004 < 0.007 06-May-19 13-May-19 303 0.008 +/- 0.004 < 0.018 13-May-19 20-May-19 289 0.018 +/- 0.004 < 0.013 20-May-19 28-May-19 338 0.013 +/- 0.004 < 0.012 28-May-19 03-Jun-19 256 0.022 +/- 0.005 < 0.021 03-Jun-19 10-Jun-19 297 0.023 +/- 0.004 < 0.014 10-Jun-19 19-Jun-19 379 0.019 +/- 0.003 < 0.008 19-Jun-19 24-Jun-19 218 0.020 +/- 0.005 < 0.013 24-Jun-19 01-Jul-19 298 0.020 +/- 0.004 < 0.011 01-Jul-19 08-Jul-19 300 0.020 +/- 0.004 < 0.007 08-Jul-19 15-Jul-19 301 0.022 +/- 0.004 < 0.008 08-Jul-19 15-Jul-19 301 0.025 +/- 0.004 Duplicate 15-Jul-19 22-Jul-19 299 0.016 +/- 0.004 < 0.009 15-Jul-19 22-Jul-19 299 0.016 +/- 0.004 Duplicate 22-Jul-19 29-Jul-19 297 0.025 +/- 0.004 < 0.007 29-Jul-19 05-Aug-19 300 0.025 +/- 0.005 < 0.010 05-Aug-19 12-Aug-19 300 0.024 +/- 0.004 < 0.010 12-Aug-19 19-Aug-19 297 0.017 +/- 0.004 < 0.011 19-Aug-19 26-Aug-19 309 0.019 +/- 0.004 < 0.008 26-Aug-19 03-Sep-19 354 0.023 +/- 0.004 < 0.007 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 3

Air Particulate Filters and Radioiodine Canisters Location: 018 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 26-Aug-19 03-Sep-19 354 0.021 +/- 0.004 Duplicate 03-Sep-19 09-Sep-19 258 0.044 +/- 0.005 < 0.009 09-Sep-19 16-Sep-19 303 0.035 +/- 0.004 < 0.013 16-Sep-19 23-Sep-19 302 0.037 +/- 0.005 < 0.009 23-Sep-19 30-Sep-19 302 0.019 +/- 0.004 < 0.008 23-Sep-19 30-Sep-19 302 0.017 +/- 0.004 Duplicate 30-Sep-19 08-Oct-19 343 0.019 +/- 0.004 < 0.007 30-Sep-19 08-Oct-19 343 0.022 +/- 0.004 Duplicate 08-Oct-19 14-Oct-19 259 0.023 +/- 0.005 < 0.010 14-Oct-19 21-Oct-19 296 0.030 +/- 0.005 < 0.012 14-Oct-19 21-Oct-19 296 0.029 +/- 0.005 Duplicate 21-Oct-19 28-Oct-19 308 0.014 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 350 0.024 +/- 0.004 < 0.009 05-Nov-19 11-Nov-19 264 0.022 +/- 0.005 < 0.010 11-Nov-19 18-Nov-19 301 0.021 +/- 0.004 < 0.011 11-Nov-19 18-Nov-19 301 0.023 +/- 0.004 Duplicate 18-Nov-19 25-Nov-19 305 0.023 +/- 0.004 < 0.009 25-Nov-19 02-Dec-19 315 0.011 +/- 0.004 < 0.015 02-Dec-19 09-Dec-19 300 0.029 +/- 0.005 < 0.010 09-Dec-19 16-Dec-19 310 0.029 +/- 0.005 < 0.008 16-Dec-19 23-Dec-19 307 0.032 +/- 0.005 < 0.016 23-Dec-19 30-Dec-19 300 0.037 +/- 0.005 < 0.013 23-Dec-19 30-Dec-19 300 0.037 +/- 0.005 Duplicate 30-Dec-19 07-Jan-20 340 0.019 +/- 0.004 < 0.012 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 4

Air Particulate Filters and Radioiodine Canisters Location: 032 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 31-Dec-18 07-Jan-19 247 0.039 +/- 0.006 < 0.020 07-Jan-19 15-Jan-19 358 0.020 +/- 0.004 < 0.006 15-Jan-19 22-Jan-19 299 0.021 +/- 0.004 < 0.008 22-Jan-19 28-Jan-19 265 0.021 +/- 0.005 < 0.010 28-Jan-19 04-Feb-19 306 0.023 +/- 0.004 < 0.015 04-Feb-19 11-Feb-19 301 0.030 +/- 0.004 < 0.022 11-Feb-19 18-Feb-19 306 0.034 +/- 0.004 < 0.008 18-Feb-19 25-Feb-19 292 0.028 +/- 0.004 < 0.010 25-Feb-19 04-Mar-19 298 0.031 +/- 0.005 < 0.007 04-Mar-19 11-Mar-19 284 0.019 +/- 0.005 < 0.019 11-Mar-19 18-Mar-19 301 0.018 +/- 0.004 < 0.014 18-Mar-19 25-Mar-19 300 0.023 +/- 0.004 < 0.008 25-Mar-19 01-Apr-19 303 0.021 +/- 0.004 < 0.005 01-Apr-19 08-Apr-19 289 0.026 +/- 0.005 < 0.017 08-Apr-19 15-Apr-19 301 0.019 +/- 0.004 < 0.009 15-Apr-19 22-Apr-19 303 0.022 +/- 0.004 < 0.010 15-Apr-19 22-Apr-19 303 0.021 +/- 0.004 Duplicate 22-Apr-19 29-Apr-19 306 0.012 +/- 0.004 < 0.008 29-Apr-19 06-May-19 298 0.015 +/- 0.004 < 0.007 06-May-19 13-May-19 305 0.007 +/- 0.004 < 0.018 13-May-19 20-May-19 300 0.018 +/- 0.004 < 0.012 20-May-19 28-May-19 339 0.012 +/- 0.004 < 0.012 28-May-19 03-Jun-19 263 0.023 +/- 0.005 < 0.021 03-Jun-19 10-Jun-19 301 0.021 +/- 0.004 < 0.014 10-Jun-19 19-Jun-19 384 0.018 +/- 0.003 < 0.008 19-Jun-19 24-Jun-19 220 0.017 +/- 0.005 < 0.013 24-Jun-19 01-Jul-19 295 0.022 +/- 0.004 < 0.011 01-Jul-19 08-Jul-19 299 0.018 +/- 0.004 < 0.007 08-Jul-19 15-Jul-19 302 0.023 +/- 0.004 < 0.008 15-Jul-19 22-Jul-19 296 0.013 +/- 0.004 < 0.009 22-Jul-19 29-Jul-19 298 0.029 +/- 0.005 < 0.007 29-Jul-19 05-Aug-19 278 0.029 +/- 0.005 < 0.011 29-Jul-19 05-Aug-19 278 0.028 +/- 0.005 Duplicate 05-Aug-19 12-Aug-19 300 0.027 +/- 0.005 < 0.010 12-Aug-19 19-Aug-19 299 0.020 +/- 0.004 < 0.011 19-Aug-19 26-Aug-19 300 0.018 +/- 0.004 < 0.008 26-Aug-19 03-Sep-19 347 0.026 +/- 0.004 < 0.007 03-Sep-19 09-Sep-19 255 0.048 +/- 0.006 < 0.009 09-Sep-19 16-Sep-19 301 0.034 +/- 0.004 < 0.013 16-Sep-19 23-Sep-19 299 0.041 +/- 0.005 < 0.009 23-Sep-19 30-Sep-19 302 0.023 +/- 0.004 < 0.008 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 5

Air Particulate Filters and Radioiodine Canisters Location: 032 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 30-Sep-19 08-Oct-19 345 0.020 +/- 0.004 < 0.007 08-Oct-19 14-Oct-19 259 0.025 +/- 0.005 < 0.010 14-Oct-19 21-Oct-19 301 0.031 +/- 0.005 < 0.012 21-Oct-19 28-Oct-19 306 0.015 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 348 0.026 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 348 0.023 +/- 0.004 Duplicate 05-Nov-19 11-Nov-19 267 0.027 +/- 0.005 < 0.010 11-Nov-19 18-Nov-19 349 0.027 +/- 0.004 < 0.010 18-Nov-19 25-Nov-19 303 0.027 +/- 0.005 < 0.009 18-Nov-19 25-Nov-19 303 0.027 +/- 0.005 Duplicate 25-Nov-19 02-Dec-19 309 0.009 +/- 0.004 < 0.015 25-Nov-19 02-Dec-19 309 0.013 +/- 0.004 Duplicate 02-Dec-19 09-Dec-19 297 0.032 +/- 0.005 < 0.010 09-Dec-19 16-Dec-19 321 0.035 +/- 0.005 < 0.007 16-Dec-19 23-Dec-19 303 0.037 +/- 0.005 < 0.017 23-Dec-19 30-Dec-19 336 0.038 +/- 0.005 < 0.012 30-Dec-19 07-Jan-20 339 0.019 +/- 0.004 < 0.012 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 6

Air Particulate Filters and Radioiodine Canisters Location: 037 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 31-Dec-18 07-Jan-19 309 0.033 +/- 0.005 < 0.016 07-Jan-19 15-Jan-19 356 0.018 +/- 0.004 < 0.006 15-Jan-19 22-Jan-19 307 0.021 +/- 0.004 < 0.007 22-Jan-19 28-Jan-19 270 0.026 +/- 0.005 < 0.010 28-Jan-19 04-Feb-19 303 0.019 +/- 0.004 < 0.015 04-Feb-19 11-Feb-19 314 0.027 +/- 0.004 < 0.025 11-Feb-19 18-Feb-19 311 0.037 +/- 0.004 < 0.007 11-Feb-19 18-Feb-19 311 0.043 +/- 0.005 Duplicate 18-Feb-19 25-Feb-19 292 0.030 +/- 0.004 < 0.010 25-Feb-19 04-Mar-19 318 0.032 +/- 0.004 < 0.006 04-Mar-19 11-Mar-19 285 0.019 +/- 0.005 < 0.019 11-Mar-19 18-Mar-19 298 0.017 +/- 0.004 < 0.014 18-Mar-19 25-Mar-19 299 0.024 +/- 0.005 < 0.008 25-Mar-19 01-Apr-19 303 0.024 +/- 0.004 < 0.005 01-Apr-19 08-Apr-19 291 0.025 +/- 0.004 < 0.016 08-Apr-19 15-Apr-19 309 0.017 +/- 0.004 < 0.009 15-Apr-19 22-Apr-19 296 0.019 +/- 0.004 < 0.010 22-Apr-19 29-Apr-19 236 0.014 +/- 0.005 < 0.010 29-Apr-19 06-May-19 296 0.012 +/- 0.004 < 0.007 06-May-19 13-May-19 308 0.010 +/- 0.004 < 0.017 06-May-19 13-May-19 308 0.009 +/- 0.004 Duplicate 13-May-19 20-May-19 286 0.016 +/- 0.004 < 0.013 20-May-19 28-May-19 334 0.013 +/- 0.004 < 0.012 28-May-19 03-Jun-19 263 0.021 +/- 0.005 < 0.021 28-May-19 03-Jun-19 263 0.022 +/- 0.005 Duplicate 03-Jun-19 10-Jun-19 293 0.019 +/- 0.004 < 0.014 03-Jun-19 10-Jun-19 293 0.021 +/- 0.004 Duplicate 10-Jun-19 19-Jun-19 386 0.019 +/- 0.003 < 0.008 19-Jun-19 24-Jun-19 209 0.019 +/- 0.006 < 0.014 24-Jun-19 01-Jul-19 302 0.025 +/- 0.005 < 0.011 01-Jul-19 08-Jul-19 297 0.021 +/- 0.004 < 0.007 01-Jul-19 08-Jul-19 297 0.023 +/- 0.004 Duplicate 08-Jul-19 15-Jul-19 300 0.024 +/- 0.004 < 0.008 15-Jul-19 22-Jul-19 296 0.014 +/- 0.004 < 0.009 22-Jul-19 29-Jul-19 303 0.028 +/- 0.004 < 0.006 29-Jul-19 05-Aug-19 281 0.029 +/- 0.005 < 0.011 05-Aug-19 12-Aug-19 297 0.027 +/- 0.005 < 0.010 12-Aug-19 19-Aug-19 286 0.019 +/- 0.005 < 0.011 19-Aug-19 26-Aug-19 309 0.014 +/- 0.004 < 0.008 26-Aug-19 03-Sep-19 351 0.019 +/- 0.004 < 0.007 03-Sep-19 09-Sep-19 262 0.047 +/- 0.005 < 0.008 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 7

Air Particulate Filters and Radioiodine Canisters Location: 037 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 09-Sep-19 16-Sep-19 304 0.033 +/- 0.004 < 0.013 16-Sep-19 23-Sep-19 299 0.039 +/- 0.005 < 0.009 23-Sep-19 30-Sep-19 301 0.021 +/- 0.004 < 0.008 30-Sep-19 08-Oct-19 315 0.023 +/- 0.004 < 0.008 08-Oct-19 14-Oct-19 265 0.022 +/- 0.005 < 0.010 14-Oct-19 21-Oct-19 296 0.032 +/- 0.005 < 0.012 21-Oct-19 28-Oct-19 307 0.019 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 349 0.025 +/- 0.004 < 0.009 05-Nov-19 11-Nov-19 261 0.025 +/- 0.005 < 0.010 11-Nov-19 18-Nov-19 305 0.025 +/- 0.004 < 0.011 18-Nov-19 25-Nov-19 317 0.026 +/- 0.004 < 0.008 25-Nov-19 02-Dec-19 316 0.014 +/- 0.004 < 0.015 02-Dec-19 09-Dec-19 291 0.033 +/- 0.005 < 0.010 09-Dec-19 16-Dec-19 308 0.039 +/- 0.005 < 0.008 16-Dec-19 23-Dec-19 303 0.035 +/- 0.005 < 0.017 23-Dec-19 30-Dec-19 296 0.038 +/- 0.005 < 0.013 30-Dec-19 07-Jan-20 346 0.018 +/- 0.004 < 0.012 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 8

Air Particulate Filters and Radioiodine Canisters Location: 049 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 31-Dec-18 07-Jan-19 313 0.037 +/- 0.005 < 0.016 31-Dec-18 07-Jan-19 313 0.032 +/- 0.005 Duplicate 07-Jan-19 15-Jan-19 362 0.017 +/- 0.004 < 0.006 07-Jan-19 15-Jan-19 362 0.017 +/- 0.004 Duplicate 15-Jan-19 22-Jan-19 305 0.021 +/- 0.004 < 0.007 22-Jan-19 28-Jan-19 273 0.029 +/- 0.005 < 0.009 28-Jan-19 04-Feb-19 306 0.022 +/- 0.004 < 0.015 04-Feb-19 11-Feb-19 315 0.027 +/- 0.004 < 0.032 11-Feb-19 18-Feb-19 315 0.032 +/- 0.004 < 0.007 18-Feb-19 25-Feb-19 284 0.034 +/- 0.005 < 0.011 25-Feb-19 04-Mar-19 314 0.031 +/- 0.004 < 0.007 04-Mar-19 11-Mar-19 288 0.022 +/- 0.005 < 0.019 11-Mar-19 18-Mar-19 296 0.019 +/- 0.004 < 0.014 18-Mar-19 25-Mar-19 300 0.023 +/- 0.004 < 0.008 25-Mar-19 01-Apr-19 300 0.021 +/- 0.004 < 0.005 01-Apr-19 08-Apr-19 290 0.024 +/- 0.004 < 0.016 08-Apr-19 15-Apr-19 303 0.015 +/- 0.004 < 0.009 08-Apr-19 15-Apr-19 303 0.018 +/- 0.004 Duplicate 15-Apr-19 22-Apr-19 301 0.020 +/- 0.004 < 0.010 22-Apr-19 29-Apr-19 306 0.014 +/- 0.004 < 0.008 29-Apr-19 06-May-19 301 0.012 +/- 0.004 < 0.007 06-May-19 13-May-19 303 0.010 +/- 0.004 < 0.018 13-May-19 20-May-19 301 0.019 +/- 0.004 < 0.012 20-May-19 28-May-19 340 0.012 +/- 0.004 < 0.012 28-May-19 03-Jun-19 259 0.023 +/- 0.005 < 0.021 03-Jun-19 10-Jun-19 298 0.024 +/- 0.004 < 0.014 10-Jun-19 19-Jun-19 368 0.020 +/- 0.004 < 0.009 19-Jun-19 24-Jun-19 216 0.020 +/- 0.005 < 0.013 24-Jun-19 01-Jul-19 293 0.021 +/- 0.004 < 0.011 01-Jul-19 08-Jul-19 299 0.020 +/- 0.004 < 0.007 08-Jul-19 15-Jul-19 298 0.023 +/- 0.004 < 0.008 15-Jul-19 22-Jul-19 303 0.013 +/- 0.004 < 0.008 22-Jul-19 29-Jul-19 300 0.025 +/- 0.004 < 0.007 29-Jul-19 05-Aug-19 302 0.027 +/- 0.005 < 0.010 05-Aug-19 12-Aug-19 293 0.028 +/- 0.005 < 0.010 12-Aug-19 19-Aug-19 295 0.020 +/- 0.005 < 0.011 19-Aug-19 26-Aug-19 304 0.016 +/- 0.004 < 0.008 26-Aug-19 03-Sep-19 349 0.024 +/- 0.004 < 0.007 03-Sep-19 09-Sep-19 258 0.041 +/- 0.005 < 0.009 09-Sep-19 16-Sep-19 303 0.036 +/- 0.005 < 0.013 16-Sep-19 23-Sep-19 299 0.036 +/- 0.005 < 0.009 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 9

Air Particulate Filters and Radioiodine Canisters Location: 049 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 23-Sep-19 30-Sep-19 396 0.017 +/- 0.003 < 0.006 30-Sep-19 08-Oct-19 351 0.018 +/- 0.004 < 0.007 08-Oct-19 14-Oct-19 262 0.023 +/- 0.005 < 0.010 14-Oct-19 21-Oct-19 302 0.031 +/- 0.005 < 0.012 21-Oct-19 28-Oct-19 312 0.016 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 352 0.025 +/- 0.004 < 0.009 05-Nov-19 11-Nov-19 260 0.023 +/- 0.005 < 0.010 11-Nov-19 18-Nov-19 320 0.027 +/- 0.004 < 0.010 18-Nov-19 25-Nov-19 303 0.026 +/- 0.005 < 0.009 25-Nov-19 02-Dec-19 309 0.011 +/- 0.004 < 0.015 02-Dec-19 09-Dec-19 301 0.040 +/- 0.005 < 0.010 09-Dec-19 16-Dec-19 310 0.030 +/- 0.005 < 0.008 16-Dec-19 23-Dec-19 322 0.035 +/- 0.005 < 0.016 23-Dec-19 30-Dec-19 304 0.041 +/- 0.005 < 0.013 30-Dec-19 07-Jan-20 344 0.020 +/- 0.004 < 0.012 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 10

Air Particulate Filters and Radioiodine Canisters Location: 053 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 31-Dec-18 07-Jan-19 324 0.039 +/- 0.005 < 0.015 07-Jan-19 15-Jan-19 360 0.016 +/- 0.004 < 0.006 15-Jan-19 22-Jan-19 303 0.024 +/- 0.004 < 0.008 22-Jan-19 28-Jan-19 276 0.025 +/- 0.005 < 0.009 28-Jan-19 04-Feb-19 304 0.023 +/- 0.004 < 0.015 04-Feb-19 11-Feb-19 310 0.025 +/- 0.004 < 0.033 11-Feb-19 18-Feb-19 305 0.037 +/- 0.005 < 0.008 18-Feb-19 25-Feb-19 290 0.028 +/- 0.004 < 0.010 25-Feb-19 04-Mar-19 308 0.033 +/- 0.005 < 0.007 04-Mar-19 11-Mar-19 284 0.021 +/- 0.005 < 0.019 11-Mar-19 18-Mar-19 297 0.017 +/- 0.004 < 0.014 18-Mar-19 25-Mar-19 302 0.021 +/- 0.004 < 0.008 25-Mar-19 01-Apr-19 303 0.023 +/- 0.004 < 0.005 25-Mar-19 01-Apr-19 303 0.019 +/- 0.004 Duplicate 01-Apr-19 08-Apr-19 288 0.023 +/- 0.004 < 0.017 08-Apr-19 15-Apr-19 308 0.019 +/- 0.004 < 0.009 15-Apr-19 22-Apr-19 302 0.022 +/- 0.004 < 0.010 22-Apr-19 29-Apr-19 305 0.016 +/- 0.004 < 0.008 29-Apr-19 06-May-19 296 0.012 +/- 0.004 < 0.007 29-Apr-19 06-May-19 296 0.012 +/- 0.004 Duplicate 06-May-19 13-May-19 302 0.007 +/- 0.004 < 0.018 13-May-19 20-May-19 303 0.016 +/- 0.004 < 0.012 20-May-19 28-May-19 334 0.010 +/- 0.004 < 0.012 28-May-19 03-Jun-19 256 0.023 +/- 0.005 < 0.021 03-Jun-19 10-Jun-19 300 0.022 +/- 0.004 < 0.014 10-Jun-19 19-Jun-19 379 0.019 +/- 0.003 < 0.008 19-Jun-19 24-Jun-19 223 0.014 +/- 0.005 < 0.013 24-Jun-19 01-Jul-19 290 0.022 +/- 0.005 < 0.011 01-Jul-19 08-Jul-19 298 0.016 +/- 0.004 < 0.007 08-Jul-19 15-Jul-19 295 0.023 +/- 0.004 < 0.008 15-Jul-19 22-Jul-19 293 0.016 +/- 0.004 < 0.009 22-Jul-19 29-Jul-19 289 0.026 +/- 0.005 < 0.007 22-Jul-19 29-Jul-19 289 0.025 +/- 0.005 Duplicate 29-Jul-19 05-Aug-19 299 0.023 +/- 0.005 < 0.010 05-Aug-19 12-Aug-19 291 0.026 +/- 0.005 < 0.010 12-Aug-19 19-Aug-19 273 0.019 +/- 0.005 < 0.012 19-Aug-19 26-Aug-19 306 0.014 +/- 0.004 < 0.008 19-Aug-19 26-Aug-19 306 0.014 +/- 0.004 Duplicate 26-Aug-19 03-Sep-19 339 0.023 +/- 0.004 < 0.007 03-Sep-19 09-Sep-19 256 0.042 +/- 0.005 < 0.009 09-Sep-19 16-Sep-19 301 0.033 +/- 0.004 < 0.013 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 11

Air Particulate Filters and Radioiodine Canisters Location: 053 Collection Collection Volume Gross Beta I-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 16-Sep-19 23-Sep-19 295 0.039 +/- 0.005 < 0.009 23-Sep-19 30-Sep-19 303 0.019 +/- 0.004 < 0.008 30-Sep-19 08-Oct-19 336 0.020 +/- 0.004 < 0.007 08-Oct-19 14-Oct-19 264 0.018 +/- 0.005 < 0.010 14-Oct-19 21-Oct-19 301 0.031 +/- 0.005 < 0.012 21-Oct-19 28-Oct-19 307 0.016 +/- 0.004 < 0.009 28-Oct-19 05-Nov-19 349 0.024 +/- 0.004 < 0.009 05-Nov-19 11-Nov-19 265 0.025 +/- 0.005 < 0.010 11-Nov-19 18-Nov-19 298 0.025 +/- 0.005 < 0.011 18-Nov-19 25-Nov-19 311 0.028 +/- 0.005 < 0.008 25-Nov-19 02-Dec-19 310 0.012 +/- 0.004 < 0.015 02-Dec-19 09-Dec-19 303 0.031 +/- 0.005 < 0.010 09-Dec-19 16-Dec-19 305 0.028 +/- 0.005 < 0.008 09-Dec-19 16-Dec-19 305 0.030 +/- 0.005 Duplicate 16-Dec-19 23-Dec-19 304 0.034 +/- 0.005 < 0.017 16-Dec-19 23-Dec-19 304 0.035 +/- 0.005 Duplicate 23-Dec-19 30-Dec-19 300 0.038 +/- 0.005 < 0.013 30-Dec-19 07-Jan-20 341 0.019 +/- 0.004 < 0.012 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 12

Quarterly Air Particulates - Gamma Location: 002 01-Apr-19 Nuclide Concentration (pCi/m3)

BE-7 0.086 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-Jul-19 Nuclide Concentration (pCi/m3)

BE-7 0.121 +/- 0.020 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.003 CO-60 < 0.001 ZN-65 < 0.003 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 30-Sep-19 Nuclide Concentration (pCi/m3)

BE-7 0.097 +/- 0.017 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Dec-19 Nuclide Concentration (pCi/m3)

BE-7 0.071 +/- 0.013 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Quarterly Air Particulates - Gamma Location: 018 01-Apr-19 Nuclide Concentration (pCi/m3)

BE-7 0.078 +/- 0.013 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-Jul-19 Nuclide Concentration (pCi/m3)

BE-7 0.099 +/- 0.019 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.004 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Sep-19 Nuclide Concentration (pCi/m3)

BE-7 0.073 +/- 0.014 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Dec-19 Nuclide Concentration (pCi/m3)

BE-7 0.070 +/- 0.019 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Quarterly Air Particulates - Gamma Location: 032 01-Apr-19 Nuclide Concentration (pCi/m3)

BE-7 0.090 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-Jul-19 Nuclide Concentration (pCi/m3)

BE-7 0.104 +/- 0.018 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Sep-19 Nuclide Concentration (pCi/m3)

BE-7 0.088 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Dec-19 Nuclide Concentration (pCi/m3)

BE-7 0.087 +/- 0.022 MN-54 < 0.002 CO-58 < 0.001 FE-59 < 0.004 CO-60 < 0.001 ZN-65 < 0.004 ZR-NB-95 < 0.003 CS-134 < 0.002 CS-137 < 0.001

Quarterly Air Particulates - Gamma Location: 037 01-Apr-19 Nuclide Concentration (pCi/m3)

BE-7 0.084 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-Jul-19 Nuclide Concentration (pCi/m3)

BE-7 0.101 +/- 0.018 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Sep-19 Nuclide Concentration (pCi/m3)

BE-7 0.088 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 30-Dec-19 Nuclide Concentration (pCi/m3)

BE-7 0.090 +/- 0.019 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Quarterly Air Particulates - Gamma Location: 049 01-Apr-19 Nuclide Concentration (pCi/m3)

BE-7 0.095 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-Jul-19 Nuclide Concentration (pCi/m3)

BE-7 0.114 +/- 0.020 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Sep-19 Nuclide Concentration (pCi/m3)

BE-7 0.088 +/- 0.017 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.003 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Dec-19 Nuclide Concentration (pCi/m3)

BE-7 0.072 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.003 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001

Quarterly Air Particulates - Gamma Location: 053 01-Apr-19 Nuclide Concentration (pCi/m3)

BE-7 0.087 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-Jul-19 Nuclide Concentration (pCi/m3)

BE-7 0.122 +/- 0.019 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Sep-19 Nuclide Concentration (pCi/m3)

BE-7 0.085 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 30-Dec-19 Nuclide Concentration (pCi/m3)

BE-7 0.072 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Jan-19 SURFACE WATER MN-54 < 2.7 10-Jan-19 SURFACE WATER CO-58 < 1.9 10-Jan-19 SURFACE WATER FE-59 < 5.0 10-Jan-19 SURFACE WATER CO-60 < 3.5 10-Jan-19 SURFACE WATER ZN-65 < 3.5 10-Jan-19 SURFACE WATER ZR-NB-95 < 2.4 10-Jan-19 SURFACE WATER I-131 < 4.8 10-Jan-19 SURFACE WATER CS-134 < 3.8 10-Jan-19 SURFACE WATER CS-137 < 3.1 10-Jan-19 SURFACE WATER BA-LA-140 < 2.4 10-Jan-19 SURFACE WATER H-3 < 177.0 26-Feb-19 SURFACE WATER MN-54 < 3.1 26-Feb-19 SURFACE WATER CO-58 < 2.3 26-Feb-19 SURFACE WATER FE-59 < 2.8 26-Feb-19 SURFACE WATER CO-60 < 1.9 26-Feb-19 SURFACE WATER ZN-65 < 4.9 26-Feb-19 SURFACE WATER ZR-NB-95 < 3.3 26-Feb-19 SURFACE WATER I-131 < 4.4 26-Feb-19 SURFACE WATER CS-134 < 3.1 26-Feb-19 SURFACE WATER CS-137 < 2.3 26-Feb-19 SURFACE WATER BA-LA-140 < 2.6 26-Feb-19 SURFACE WATER H-3 < 157.0 26-Feb-19 SURFACE WATER FE-55 < 69.0 11-Mar-19 SURFACE WATER MN-54 < 3.7 11-Mar-19 SURFACE WATER CO-58 < 5.5 11-Mar-19 SURFACE WATER FE-59 < 7.7 11-Mar-19 SURFACE WATER CO-60 < 3.2 11-Mar-19 SURFACE WATER ZN-65 < 5.6 11-Mar-19 SURFACE WATER ZR-NB-95 < 4.2 11-Mar-19 SURFACE WATER I-131 < 6.0 11-Mar-19 SURFACE WATER CS-134 < 4.8 11-Mar-19 SURFACE WATER CS-137 < 4.9 11-Mar-19 SURFACE WATER BA-LA-140 < 2.3 11-Mar-19 SURFACE WATER H-3 < 154.0 08-Apr-19 SURFACE WATER MN-54 < 3.0 08-Apr-19 SURFACE WATER CO-58 < 2.3 08-Apr-19 SURFACE WATER FE-59 < 4.7 08-Apr-19 SURFACE WATER CO-60 < 2.4 2019 Annual Radiological Environmental Operating Report Page C - 19 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Apr-19 SURFACE WATER ZN-65 < 3.6 08-Apr-19 SURFACE WATER ZR-NB-95 < 2.1 08-Apr-19 SURFACE WATER I-131 < 5.4 08-Apr-19 SURFACE WATER CS-134 < 3.8 08-Apr-19 SURFACE WATER CS-137 < 3.4 08-Apr-19 SURFACE WATER BA-LA-140 < 1.6 08-Apr-19 SURFACE WATER H-3 < 152.0 13-May-19 SURFACE WATER MN-54 < 2.8 Duplicate 13-May-19 SURFACE WATER MN-54 < 2.0 13-May-19 SURFACE WATER CO-58 < 2.9 Duplicate 13-May-19 SURFACE WATER CO-58 < 2.7 13-May-19 SURFACE WATER FE-59 < 3.2 Duplicate 13-May-19 SURFACE WATER FE-59 < 3.6 13-May-19 SURFACE WATER CO-60 < 2.8 Duplicate 13-May-19 SURFACE WATER CO-60 < 1.4 13-May-19 SURFACE WATER ZN-65 < 3.6 Duplicate 13-May-19 SURFACE WATER ZN-65 < 3.6 13-May-19 SURFACE WATER ZR-NB-95 < 2.7 Duplicate 13-May-19 SURFACE WATER ZR-NB-95 < 2.1 13-May-19 SURFACE WATER I-131 < 6.4 Duplicate 13-May-19 SURFACE WATER I-131 < 4.4 13-May-19 SURFACE WATER CS-134 < 3.2 Duplicate 13-May-19 SURFACE WATER CS-134 < 3.9 13-May-19 SURFACE WATER CS-137 < 3.2 Duplicate 13-May-19 SURFACE WATER CS-137 < 2.5 13-May-19 SURFACE WATER BA-LA-140 < 2.0 Duplicate 13-May-19 SURFACE WATER BA-LA-140 < 1.8 13-May-19 SURFACE WATER H-3 < 154.0 Duplicate 13-May-19 SURFACE WATER H-3 < 154.0 13-May-19 SURFACE WATER FE-55 < 61.0 Duplicate 13-May-19 SURFACE WATER FE-55 < 61.0 10-Jun-19 SURFACE WATER MN-54 < 2.6 10-Jun-19 SURFACE WATER CO-58 < 3.5 10-Jun-19 SURFACE WATER FE-59 < 3.3 10-Jun-19 SURFACE WATER CO-60 < 1.7 10-Jun-19 SURFACE WATER ZN-65 < 5.4 10-Jun-19 SURFACE WATER ZR-NB-95 < 3.3 10-Jun-19 SURFACE WATER I-131 < 11.7 2019 Annual Radiological Environmental Operating Report Page C - 20 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Jun-19 SURFACE WATER CS-134 < 3.2 10-Jun-19 SURFACE WATER CS-137 < 2.7 10-Jun-19 SURFACE WATER BA-LA-140 < 4.0 10-Jun-19 SURFACE WATER H-3 < 154.0 10-Jul-19 SURFACE WATER MN-54 < 3.7 10-Jul-19 SURFACE WATER CO-58 < 4.4 10-Jul-19 SURFACE WATER FE-59 < 8.6 10-Jul-19 SURFACE WATER CO-60 < 3.2 10-Jul-19 SURFACE WATER ZN-65 < 8.6 10-Jul-19 SURFACE WATER ZR-NB-95 < 4.4 10-Jul-19 SURFACE WATER I-131 < 5.8 10-Jul-19 SURFACE WATER CS-134 < 4.6 10-Jul-19 SURFACE WATER CS-137 < 4.0 10-Jul-19 SURFACE WATER BA-LA-140 < 5.4 10-Jul-19 SURFACE WATER H-3 < 159.0 12-Aug-19 SURFACE WATER MN-54 < 1.7 12-Aug-19 SURFACE WATER CO-58 < 1.9 12-Aug-19 SURFACE WATER FE-59 < 5.2 12-Aug-19 SURFACE WATER CO-60 < 1.5 12-Aug-19 SURFACE WATER ZN-65 < 2.9 12-Aug-19 SURFACE WATER ZR-NB-95 < 2.3 12-Aug-19 SURFACE WATER I-131 < 3.1 12-Aug-19 SURFACE WATER CS-134 < 2.9 12-Aug-19 SURFACE WATER CS-137 < 2.7 12-Aug-19 SURFACE WATER BA-LA-140 < 2.2 12-Aug-19 SURFACE WATER H-3 < 152.0 12-Aug-19 SURFACE WATER FE-55 < 69.0 16-Sep-19 SURFACE WATER MN-54 < 3.3 16-Sep-19 SURFACE WATER CO-58 < 5.3 16-Sep-19 SURFACE WATER FE-59 < 7.1 16-Sep-19 SURFACE WATER CO-60 < 3.8 16-Sep-19 SURFACE WATER ZN-65 < 7.0 16-Sep-19 SURFACE WATER ZR-NB-95 < 2.8 16-Sep-19 SURFACE WATER I-131 < 5.9 16-Sep-19 SURFACE WATER CS-134 < 4.6 16-Sep-19 SURFACE WATER CS-137 < 3.1 16-Sep-19 SURFACE WATER BA-LA-140 < 2.6 16-Sep-19 SURFACE WATER H-3 < 153.0 2019 Annual Radiological Environmental Operating Report Page C - 21 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 SURFACE WATER MN-54 < 2.8 08-Oct-19 SURFACE WATER CO-58 < 1.6 08-Oct-19 SURFACE WATER FE-59 < 3.2 08-Oct-19 SURFACE WATER CO-60 < 4.1 08-Oct-19 SURFACE WATER ZN-65 < 4.3 08-Oct-19 SURFACE WATER ZR-NB-95 < 2.9 08-Oct-19 SURFACE WATER I-131 < 2.9 08-Oct-19 SURFACE WATER CS-134 < 3.3 08-Oct-19 SURFACE WATER CS-137 < 2.5 08-Oct-19 SURFACE WATER BA-LA-140 < 1.9 08-Oct-19 SURFACE WATER H-3 < 151.0 08-Oct-19 SURFACE WATER FE-55 < 67.0 18-Nov-19 SURFACE WATER MN-54 < 2.8 18-Nov-19 SURFACE WATER CO-58 < 2.7 18-Nov-19 SURFACE WATER FE-59 < 7.2 18-Nov-19 SURFACE WATER CO-60 < 2.9 18-Nov-19 SURFACE WATER ZN-65 < 7.6 18-Nov-19 SURFACE WATER ZR-NB-95 < 2.6 18-Nov-19 SURFACE WATER I-131 < 6.0 18-Nov-19 SURFACE WATER CS-134 < 3.9 18-Nov-19 SURFACE WATER CS-137 < 3.5 18-Nov-19 SURFACE WATER BA-LA-140 < 3.6 18-Nov-19 SURFACE WATER H-3 < 156.0 09-Dec-19 SURFACE WATER MN-54 < 2.6 09-Dec-19 SURFACE WATER CO-58 < 3.9 09-Dec-19 SURFACE WATER FE-59 < 5.6 09-Dec-19 SURFACE WATER CO-60 < 2.6 09-Dec-19 SURFACE WATER ZN-65 < 7.6 09-Dec-19 SURFACE WATER ZR-NB-95 < 2.3 09-Dec-19 SURFACE WATER I-131 < 3.8 09-Dec-19 SURFACE WATER CS-134 < 5.5 09-Dec-19 SURFACE WATER CS-137 < 4.2 09-Dec-19 SURFACE WATER BA-LA-140 < 4.5 09-Dec-19 SURFACE WATER H-3 < 150.0 2019 Annual Radiological Environmental Operating Report Page C - 22 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Jan-19 SURFACE WATER MN-54 < 2.8 10-Jan-19 SURFACE WATER CO-58 < 2.8 10-Jan-19 SURFACE WATER FE-59 < 4.6 10-Jan-19 SURFACE WATER CO-60 < 3.0 10-Jan-19 SURFACE WATER ZN-65 < 5.1 10-Jan-19 SURFACE WATER ZR-NB-95 < 2.9 10-Jan-19 SURFACE WATER I-131 < 8.5 10-Jan-19 SURFACE WATER CS-134 < 3.5 10-Jan-19 SURFACE WATER CS-137 < 4.5 10-Jan-19 SURFACE WATER BA-LA-140 < 1.8 10-Jan-19 SURFACE WATER H-3 9,070 +/- 268.0 26-Feb-19 SURFACE WATER MN-54 < 2.2 26-Feb-19 SURFACE WATER CO-58 < 1.5 26-Feb-19 SURFACE WATER FE-59 < 4.8 26-Feb-19 SURFACE WATER CO-60 < 1.7 26-Feb-19 SURFACE WATER ZN-65 < 3.1 26-Feb-19 SURFACE WATER ZR-NB-95 < 3.1 26-Feb-19 SURFACE WATER I-131 < 2.9 26-Feb-19 SURFACE WATER CS-134 < 3.9 26-Feb-19 SURFACE WATER CS-137 < 2.9 26-Feb-19 SURFACE WATER BA-LA-140 < 1.6 26-Feb-19 SURFACE WATER H-3 9,040 +/- 287.0 26-Feb-19 SURFACE WATER FE-55 < 65.0 11-Mar-19 SURFACE WATER MN-54 < 3.0 11-Mar-19 SURFACE WATER CO-58 < 2.4 11-Mar-19 SURFACE WATER FE-59 < 3.7 11-Mar-19 SURFACE WATER CO-60 < 2.0 11-Mar-19 SURFACE WATER ZN-65 < 3.3 11-Mar-19 SURFACE WATER ZR-NB-95 < 2.2 11-Mar-19 SURFACE WATER I-131 < 4.1 11-Mar-19 SURFACE WATER CS-134 < 2.8 11-Mar-19 SURFACE WATER CS-137 < 2.8 11-Mar-19 SURFACE WATER BA-LA-140 < 2.0 11-Mar-19 SURFACE WATER H-3 9,880 +/- 298.0 08-Apr-19 SURFACE WATER MN-54 < 2.2 08-Apr-19 SURFACE WATER MN-54 < 2.0 Duplicate 08-Apr-19 SURFACE WATER CO-58 < 3.0 Duplicate 08-Apr-19 SURFACE WATER CO-58 < 2.4 2019 Annual Radiological Environmental Operating Report Page C - 23 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Apr-19 SURFACE WATER FE-59 < 4.8 Duplicate 08-Apr-19 SURFACE WATER FE-59 < 4.5 08-Apr-19 SURFACE WATER CO-60 < 1.7 08-Apr-19 SURFACE WATER CO-60 < 1.7 Duplicate 08-Apr-19 SURFACE WATER ZN-65 < 6.5 08-Apr-19 SURFACE WATER ZN-65 < 3.6 Duplicate 08-Apr-19 SURFACE WATER ZR-NB-95 < 2.0 Duplicate 08-Apr-19 SURFACE WATER ZR-NB-95 < 3.1 08-Apr-19 SURFACE WATER I-131 < 3.2 Duplicate 08-Apr-19 SURFACE WATER I-131 < 5.5 08-Apr-19 SURFACE WATER CS-134 < 3.6 Duplicate 08-Apr-19 SURFACE WATER CS-134 < 4.4 08-Apr-19 SURFACE WATER CS-137 < 3.5 08-Apr-19 SURFACE WATER CS-137 < 2.4 Duplicate 08-Apr-19 SURFACE WATER BA-LA-140 < 3.4 08-Apr-19 SURFACE WATER BA-LA-140 < 1.6 Duplicate 08-Apr-19 SURFACE WATER H-3 9,997 +/- 300.0 08-Apr-19 SURFACE WATER H-3 10,329 +/- 305.0 Duplicate 13-May-19 SURFACE WATER MN-54 < 3.7 13-May-19 SURFACE WATER CO-58 < 2.7 13-May-19 SURFACE WATER FE-59 < 5.1 13-May-19 SURFACE WATER CO-60 < 3.2 13-May-19 SURFACE WATER ZN-65 < 4.1 13-May-19 SURFACE WATER ZR-NB-95 < 3.9 13-May-19 SURFACE WATER I-131 < 6.8 13-May-19 SURFACE WATER CS-134 < 4.8 13-May-19 SURFACE WATER CS-137 < 4.7 13-May-19 SURFACE WATER BA-LA-140 < 1.8 13-May-19 SURFACE WATER H-3 8,983 +/- 285.0 13-May-19 SURFACE WATER FE-55 < 64.0 10-Jun-19 SURFACE WATER MN-54 < 1.9 10-Jun-19 SURFACE WATER CO-58 < 1.9 10-Jun-19 SURFACE WATER FE-59 < 3.2 10-Jun-19 SURFACE WATER CO-60 < 2.0 10-Jun-19 SURFACE WATER ZN-65 < 2.6 10-Jun-19 SURFACE WATER ZR-NB-95 < 3.5 10-Jun-19 SURFACE WATER I-131 < 10.7 10-Jun-19 SURFACE WATER CS-134 < 2.5 2019 Annual Radiological Environmental Operating Report Page C - 24 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Jun-19 SURFACE WATER CS-137 < 2.7 10-Jun-19 SURFACE WATER BA-LA-140 < 4.4 10-Jun-19 SURFACE WATER H-3 8,867 +/- 283.0 10-Jul-19 SURFACE WATER MN-54 < 4.2 10-Jul-19 SURFACE WATER CO-58 < 5.0 10-Jul-19 SURFACE WATER FE-59 < 5.5 10-Jul-19 SURFACE WATER CO-60 < 4.8 10-Jul-19 SURFACE WATER ZN-65 < 9.9 10-Jul-19 SURFACE WATER ZR-NB-95 < 3.6 10-Jul-19 SURFACE WATER I-131 < 5.4 10-Jul-19 SURFACE WATER CS-134 < 5.8 10-Jul-19 SURFACE WATER CS-137 < 4.8 10-Jul-19 SURFACE WATER BA-LA-140 < 3.1 10-Jul-19 SURFACE WATER H-3 12,250 +/- 336.0 12-Aug-19 SURFACE WATER MN-54 < 2.1 12-Aug-19 SURFACE WATER CO-58 < 2.4 12-Aug-19 SURFACE WATER FE-59 < 2.7 12-Aug-19 SURFACE WATER CO-60 < 2.6 12-Aug-19 SURFACE WATER ZN-65 < 2.8 12-Aug-19 SURFACE WATER ZR-NB-95 < 3.0 12-Aug-19 SURFACE WATER I-131 < 3.6 12-Aug-19 SURFACE WATER CS-134 < 2.5 12-Aug-19 SURFACE WATER CS-137 < 2.7 12-Aug-19 SURFACE WATER BA-LA-140 < 1.7 12-Aug-19 SURFACE WATER H-3 12,331 +/- 340.0 12-Aug-19 SURFACE WATER FE-55 < 70.0 16-Sep-19 SURFACE WATER MN-54 < 2.7 16-Sep-19 SURFACE WATER CO-58 < 2.4 16-Sep-19 SURFACE WATER FE-59 < 6.5 16-Sep-19 SURFACE WATER CO-60 < 2.1 16-Sep-19 SURFACE WATER ZN-65 < 5.0 16-Sep-19 SURFACE WATER ZR-NB-95 < 2.9 16-Sep-19 SURFACE WATER I-131 < 6.2 16-Sep-19 SURFACE WATER CS-134 < 4.8 16-Sep-19 SURFACE WATER CS-137 < 3.7 16-Sep-19 SURFACE WATER BA-LA-140 < 3.3 16-Sep-19 SURFACE WATER H-3 11,304 +/- 326.0 08-Oct-19 SURFACE WATER MN-54 < 3.2 2019 Annual Radiological Environmental Operating Report Page C - 25 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 SURFACE WATER CO-58 < 2.6 08-Oct-19 SURFACE WATER FE-59 < 2.3 08-Oct-19 SURFACE WATER CO-60 < 2.7 08-Oct-19 SURFACE WATER ZN-65 < 3.0 08-Oct-19 SURFACE WATER ZR-NB-95 < 2.7 08-Oct-19 SURFACE WATER I-131 < 4.5 08-Oct-19 SURFACE WATER CS-134 < 3.0 08-Oct-19 SURFACE WATER CS-137 < 2.5 08-Oct-19 SURFACE WATER BA-LA-140 < 1.9 08-Oct-19 SURFACE WATER H-3 10,886 +/- 317.0 08-Oct-19 SURFACE WATER FE-55 < 69.0 18-Nov-19 SURFACE WATER MN-54 < 3.3 18-Nov-19 SURFACE WATER CO-58 < 2.2 18-Nov-19 SURFACE WATER FE-59 < 4.7 18-Nov-19 SURFACE WATER CO-60 < 1.2 18-Nov-19 SURFACE WATER ZN-65 < 5.5 18-Nov-19 SURFACE WATER ZR-NB-95 < 2.9 18-Nov-19 SURFACE WATER I-131 < 6.4 18-Nov-19 SURFACE WATER CS-134 < 4.8 18-Nov-19 SURFACE WATER CS-137 < 2.4 18-Nov-19 SURFACE WATER BA-LA-140 < 4.1 18-Nov-19 SURFACE WATER H-3 11,306 +/- 325.0 09-Dec-19 SURFACE WATER MN-54 < 5.1 09-Dec-19 SURFACE WATER CO-58 < 6.4 09-Dec-19 SURFACE WATER FE-59 < 12.8 09-Dec-19 SURFACE WATER CO-60 < 5.7 09-Dec-19 SURFACE WATER ZN-65 < 16.0 09-Dec-19 SURFACE WATER ZR-NB-95 < 8.0 09-Dec-19 SURFACE WATER I-131 < 7.4 09-Dec-19 SURFACE WATER CS-134 < 6.3 09-Dec-19 SURFACE WATER CS-137 < 7.0 09-Dec-19 SURFACE WATER BA-LA-140 < 6.3 09-Dec-19 SURFACE WATER H-3 11,481 +/- 326.0 2019 Annual Radiological Environmental Operating Report Page C - 26 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: B-12 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 2.3 11-Mar-19 GROUND WATER CO-58 < 1.6 11-Mar-19 GROUND WATER FE-59 < 3.4 11-Mar-19 GROUND WATER CO-60 < 1.5 11-Mar-19 GROUND WATER ZN-65 < 5.0 11-Mar-19 GROUND WATER ZR-NB-95 < 3.6 11-Mar-19 GROUND WATER I-131 < 0.316 11-Mar-19 GROUND WATER CS-134 < 4.2 11-Mar-19 GROUND WATER CS-137 < 3.7 11-Mar-19 GROUND WATER BA-LA-140 < 3.1 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 2.2 13-May-19 GROUND WATER CO-58 < 2.2 13-May-19 GROUND WATER FE-59 < 5.8 13-May-19 GROUND WATER CO-60 < 2.7 13-May-19 GROUND WATER ZN-65 < 5.2 13-May-19 GROUND WATER ZR-NB-95 < 4.0 13-May-19 GROUND WATER I-131 < 0.345 13-May-19 GROUND WATER CS-134 < 4.5 13-May-19 GROUND WATER CS-137 < 2.1 13-May-19 GROUND WATER BA-LA-140 < 3.0 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 3.2 14-Aug-19 GROUND WATER CO-58 < 1.5 14-Aug-19 GROUND WATER FE-59 < 3.1 14-Aug-19 GROUND WATER CO-60 < 1.9 14-Aug-19 GROUND WATER ZN-65 < 5.4 14-Aug-19 GROUND WATER ZR-NB-95 < 1.8 14-Aug-19 GROUND WATER I-131 < 0.255 14-Aug-19 GROUND WATER CS-134 < 4.5 14-Aug-19 GROUND WATER CS-137 < 3.4 14-Aug-19 GROUND WATER BA-LA-140 < 4.6 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 3.1 08-Oct-19 GROUND WATER CO-58 < 1.6 08-Oct-19 GROUND WATER FE-59 < 5.7 08-Oct-19 GROUND WATER CO-60 < 2.5 08-Oct-19 GROUND WATER ZN-65 < 7.3 2019 Annual Radiological Environmental Operating Report Page C - 27 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: B-12 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 GROUND WATER ZR-NB-95 < 2.5 08-Oct-19 GROUND WATER I-131 < 0.363 08-Oct-19 GROUND WATER CS-134 < 3.4 08-Oct-19 GROUND WATER CS-137 < 2.4 08-Oct-19 GROUND WATER BA-LA-140 < 3.0 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 28 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-10 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 2.4 11-Mar-19 GROUND WATER CO-58 < 1.8 11-Mar-19 GROUND WATER FE-59 < 3.5 11-Mar-19 GROUND WATER CO-60 < 2.0 11-Mar-19 GROUND WATER ZN-65 < 6.5 11-Mar-19 GROUND WATER ZR-NB-95 < 3.1 11-Mar-19 GROUND WATER I-131 < 0.31 11-Mar-19 GROUND WATER CS-134 < 2.9 11-Mar-19 GROUND WATER CS-137 < 3.2 11-Mar-19 GROUND WATER BA-LA-140 < 2.8 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 3.3 13-May-19 GROUND WATER CO-58 < 2.4 13-May-19 GROUND WATER FE-59 < 6.5 13-May-19 GROUND WATER CO-60 < 4.2 13-May-19 GROUND WATER ZN-65 < 4.4 13-May-19 GROUND WATER ZR-NB-95 < 2.4 13-May-19 GROUND WATER I-131 < 0.365 13-May-19 GROUND WATER CS-134 < 4.2 13-May-19 GROUND WATER CS-137 < 2.5 13-May-19 GROUND WATER BA-LA-140 < 1.8 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 2.1 14-Aug-19 GROUND WATER CO-58 < 1.8 14-Aug-19 GROUND WATER FE-59 < 4.3 14-Aug-19 GROUND WATER CO-60 < 2.7 14-Aug-19 GROUND WATER ZN-65 < 6.1 14-Aug-19 GROUND WATER ZR-NB-95 < 3.2 14-Aug-19 GROUND WATER I-131 < 0.401 14-Aug-19 GROUND WATER CS-134 < 4.1 14-Aug-19 GROUND WATER CS-137 < 3.6 14-Aug-19 GROUND WATER BA-LA-140 < 3.4 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 4.4 08-Oct-19 GROUND WATER CO-58 < 2.2 08-Oct-19 GROUND WATER FE-59 < 3.8 08-Oct-19 GROUND WATER CO-60 < 4.5 08-Oct-19 GROUND WATER ZN-65 < 7.0 2019 Annual Radiological Environmental Operating Report Page C - 29 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-10 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 GROUND WATER ZR-NB-95 < 4.8 08-Oct-19 GROUND WATER I-131 < 0.366 08-Oct-19 GROUND WATER CS-134 < 4.9 08-Oct-19 GROUND WATER CS-137 < 3.5 08-Oct-19 GROUND WATER BA-LA-140 < 5.6 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 30 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 2.7 11-Mar-19 GROUND WATER CO-58 < 1.9 11-Mar-19 GROUND WATER FE-59 < 3.8 11-Mar-19 GROUND WATER CO-60 < 1.8 11-Mar-19 GROUND WATER ZN-65 < 6.6 11-Mar-19 GROUND WATER ZR-NB-95 < 2.1 11-Mar-19 GROUND WATER I-131 < 0.305 11-Mar-19 GROUND WATER CS-134 < 2.9 11-Mar-19 GROUND WATER CS-137 < 3.2 11-Mar-19 GROUND WATER BA-LA-140 < 3.4 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 3.4 13-May-19 GROUND WATER CO-58 < 1.9 13-May-19 GROUND WATER FE-59 < 3.3 13-May-19 GROUND WATER CO-60 < 2.1 13-May-19 GROUND WATER ZN-65 < 5.3 13-May-19 GROUND WATER ZR-NB-95 < 4.6 13-May-19 GROUND WATER I-131 < 0.475 13-May-19 GROUND WATER CS-134 < 3.5 13-May-19 GROUND WATER CS-137 < 2.0 13-May-19 GROUND WATER BA-LA-140 < 3.5 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 3.4 14-Aug-19 GROUND WATER CO-58 < 3.4 14-Aug-19 GROUND WATER FE-59 < 9.4 14-Aug-19 GROUND WATER CO-60 < 3.7 14-Aug-19 GROUND WATER ZN-65 < 11.9 14-Aug-19 GROUND WATER ZR-NB-95 < 4.2 14-Aug-19 GROUND WATER I-131 < 0.32 14-Aug-19 GROUND WATER CS-134 < 5.1 14-Aug-19 GROUND WATER CS-137 < 4.4 14-Aug-19 GROUND WATER BA-LA-140 < 4.2 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 2.8 08-Oct-19 GROUND WATER CO-58 < 3.0 08-Oct-19 GROUND WATER FE-59 < 3.2 08-Oct-19 GROUND WATER CO-60 < 1.4 08-Oct-19 GROUND WATER ZN-65 < 6.5 2019 Annual Radiological Environmental Operating Report Page C - 31 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 GROUND WATER ZR-NB-95 < 2.1 08-Oct-19 GROUND WATER I-131 < 0.436 08-Oct-19 GROUND WATER CS-134 < 4.0 08-Oct-19 GROUND WATER CS-137 < 4.0 08-Oct-19 GROUND WATER BA-LA-140 < 2.7 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 32 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: F-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 5.5 11-Mar-19 GROUND WATER CO-58 < 2.9 11-Mar-19 GROUND WATER FE-59 < 8.2 11-Mar-19 GROUND WATER CO-60 < 7.2 11-Mar-19 GROUND WATER ZN-65 < 6.0 11-Mar-19 GROUND WATER ZR-NB-95 < 5.3 11-Mar-19 GROUND WATER I-131 < 0.354 11-Mar-19 GROUND WATER CS-134 < 5.5 11-Mar-19 GROUND WATER CS-137 < 3.4 11-Mar-19 GROUND WATER BA-LA-140 < 4.0 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 3.2 13-May-19 GROUND WATER CO-58 < 2.5 13-May-19 GROUND WATER FE-59 < 2.1 13-May-19 GROUND WATER CO-60 < 1.6 13-May-19 GROUND WATER ZN-65 < 7.5 13-May-19 GROUND WATER ZR-NB-95 < 3.1 13-May-19 GROUND WATER I-131 < 0.294 13-May-19 GROUND WATER CS-134 < 4.8 13-May-19 GROUND WATER CS-137 < 3.7 13-May-19 GROUND WATER BA-LA-140 < 2.8 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 2.4 14-Aug-19 GROUND WATER CO-58 < 1.6 14-Aug-19 GROUND WATER FE-59 < 2.9 14-Aug-19 GROUND WATER CO-60 < 1.8 14-Aug-19 GROUND WATER ZN-65 < 4.2 14-Aug-19 GROUND WATER ZR-NB-95 < 3.1 14-Aug-19 GROUND WATER I-131 < 0.366 14-Aug-19 GROUND WATER CS-134 < 3.2 14-Aug-19 GROUND WATER CS-137 < 2.4 14-Aug-19 GROUND WATER BA-LA-140 < 3.0 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 2.7 08-Oct-19 GROUND WATER CO-58 < 1.6 08-Oct-19 GROUND WATER FE-59 < 5.4 08-Oct-19 GROUND WATER CO-60 < 2.3 08-Oct-19 GROUND WATER ZN-65 < 4.8 2019 Annual Radiological Environmental Operating Report Page C - 33 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: F-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 GROUND WATER ZR-NB-95 < 3.3 08-Oct-19 GROUND WATER I-131 < 0.341 08-Oct-19 GROUND WATER CS-134 < 3.3 08-Oct-19 GROUND WATER CS-137 < 2.0 08-Oct-19 GROUND WATER BA-LA-140 < 2.4 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 34 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: G-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 3.3 11-Mar-19 GROUND WATER CO-58 < 3.4 11-Mar-19 GROUND WATER FE-59 < 4.6 11-Mar-19 GROUND WATER CO-60 < 3.9 11-Mar-19 GROUND WATER ZN-65 < 5.8 11-Mar-19 GROUND WATER ZR-NB-95 < 3.1 11-Mar-19 GROUND WATER I-131 < 0.317 11-Mar-19 GROUND WATER CS-134 < 5.1 11-Mar-19 GROUND WATER CS-137 < 4.1 11-Mar-19 GROUND WATER BA-LA-140 < 4.2 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 2.0 13-May-19 GROUND WATER CO-58 < 2.2 13-May-19 GROUND WATER FE-59 < 4.9 13-May-19 GROUND WATER CO-60 < 1.7 13-May-19 GROUND WATER ZN-65 < 3.5 13-May-19 GROUND WATER ZR-NB-95 < 2.4 13-May-19 GROUND WATER I-131 < 0.302 13-May-19 GROUND WATER CS-134 < 3.1 13-May-19 GROUND WATER CS-137 < 2.1 13-May-19 GROUND WATER BA-LA-140 < 1.6 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 3.3 14-Aug-19 GROUND WATER CO-58 < 3.3 14-Aug-19 GROUND WATER FE-59 < 4.5 14-Aug-19 GROUND WATER CO-60 < 3.0 14-Aug-19 GROUND WATER ZN-65 < 7.2 14-Aug-19 GROUND WATER ZR-NB-95 < 3.8 14-Aug-19 GROUND WATER I-131 < 0.414 14-Aug-19 GROUND WATER CS-134 < 4.2 14-Aug-19 GROUND WATER CS-137 < 3.1 14-Aug-19 GROUND WATER BA-LA-140 < 3.8 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 2.5 08-Oct-19 GROUND WATER CO-58 < 2.9 08-Oct-19 GROUND WATER FE-59 < 3.0 08-Oct-19 GROUND WATER CO-60 < 1.7 08-Oct-19 GROUND WATER ZN-65 < 3.2 2019 Annual Radiological Environmental Operating Report Page C - 35 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: G-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Oct-19 GROUND WATER ZR-NB-95 < 1.8 08-Oct-19 GROUND WATER I-131 < 0.388 08-Oct-19 GROUND WATER CS-134 < 3.1 08-Oct-19 GROUND WATER CS-137 < 2.1 08-Oct-19 GROUND WATER BA-LA-140 < 2.0 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 36 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 3.3 11-Mar-19 GROUND WATER CO-58 < 2.0 11-Mar-19 GROUND WATER FE-59 < 4.1 11-Mar-19 GROUND WATER CO-60 < 3.0 11-Mar-19 GROUND WATER ZN-65 < 4.6 11-Mar-19 GROUND WATER ZR-NB-95 < 5.1 11-Mar-19 GROUND WATER I-131 < 0.3 11-Mar-19 GROUND WATER CS-134 < 3.6 11-Mar-19 GROUND WATER CS-137 < 4.1 11-Mar-19 GROUND WATER BA-LA-140 < 4.5 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 1.7 13-May-19 GROUND WATER CO-58 < 2.1 13-May-19 GROUND WATER FE-59 < 5.2 13-May-19 GROUND WATER CO-60 < 1.8 13-May-19 GROUND WATER ZN-65 < 8.1 13-May-19 GROUND WATER ZR-NB-95 < 4.9 13-May-19 GROUND WATER I-131 < 0.292 13-May-19 GROUND WATER CS-134 < 3.6 13-May-19 GROUND WATER CS-137 < 3.7 13-May-19 GROUND WATER BA-LA-140 < 4.1 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 3.3 Duplicate 14-Aug-19 GROUND WATER MN-54 < 3.3 14-Aug-19 GROUND WATER CO-58 < 2.8 14-Aug-19 GROUND WATER CO-58 < 1.3 Duplicate 14-Aug-19 GROUND WATER FE-59 < 4.9 14-Aug-19 GROUND WATER FE-59 < 3.9 Duplicate 14-Aug-19 GROUND WATER CO-60 < 1.8 14-Aug-19 GROUND WATER CO-60 < 2.5 Duplicate 14-Aug-19 GROUND WATER ZN-65 < 7.0 Duplicate 14-Aug-19 GROUND WATER ZN-65 < 6.7 14-Aug-19 GROUND WATER ZR-NB-95 < 3.9 Duplicate 14-Aug-19 GROUND WATER ZR-NB-95 < 3.8 14-Aug-19 GROUND WATER I-131 < 0.472 Duplicate 14-Aug-19 GROUND WATER I-131 < 0.347 14-Aug-19 GROUND WATER CS-134 < 3.0 Duplicate 14-Aug-19 GROUND WATER CS-134 < 4.1 2019 Annual Radiological Environmental Operating Report Page C - 37 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 14-Aug-19 GROUND WATER CS-137 < 4.1 14-Aug-19 GROUND WATER CS-137 < 2.7 Duplicate 14-Aug-19 GROUND WATER BA-LA-140 < 3.0 14-Aug-19 GROUND WATER BA-LA-140 < 2.0 Duplicate 14-Aug-19 GROUND WATER H-3 < 152.0 Duplicate 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 2.6 08-Oct-19 GROUND WATER CO-58 < 1.6 08-Oct-19 GROUND WATER FE-59 < 3.1 08-Oct-19 GROUND WATER CO-60 < 1.9 08-Oct-19 GROUND WATER ZN-65 < 3.5 08-Oct-19 GROUND WATER ZR-NB-95 < 1.9 08-Oct-19 GROUND WATER I-131 < 0.418 08-Oct-19 GROUND WATER CS-134 < 2.9 08-Oct-19 GROUND WATER CS-137 < 2.3 08-Oct-19 GROUND WATER BA-LA-140 < 2.3 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 38 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Mar-19 GROUND WATER MN-54 < 4.2 11-Mar-19 GROUND WATER MN-54 < 3.7 Duplicate 11-Mar-19 GROUND WATER CO-58 < 2.5 Duplicate 11-Mar-19 GROUND WATER CO-58 < 1.6 11-Mar-19 GROUND WATER FE-59 < 4.1 11-Mar-19 GROUND WATER FE-59 < 4.1 Duplicate 11-Mar-19 GROUND WATER CO-60 < 3.2 11-Mar-19 GROUND WATER CO-60 < 2.6 Duplicate 11-Mar-19 GROUND WATER ZN-65 < 6.2 Duplicate 11-Mar-19 GROUND WATER ZN-65 < 5.4 11-Mar-19 GROUND WATER ZR-NB-95 < 4.9 11-Mar-19 GROUND WATER ZR-NB-95 < 3.2 Duplicate 11-Mar-19 GROUND WATER I-131 < 0.431 11-Mar-19 GROUND WATER I-131 < 0.377 Duplicate 11-Mar-19 GROUND WATER CS-134 < 4.6 11-Mar-19 GROUND WATER CS-134 < 4.9 Duplicate 11-Mar-19 GROUND WATER CS-137 < 4.0 Duplicate 11-Mar-19 GROUND WATER CS-137 < 3.1 11-Mar-19 GROUND WATER BA-LA-140 < 2.9 Duplicate 11-Mar-19 GROUND WATER BA-LA-140 < 3.2 11-Mar-19 GROUND WATER H-3 < 154.0 Duplicate 11-Mar-19 GROUND WATER H-3 < 154.0 13-May-19 GROUND WATER MN-54 < 3.4 13-May-19 GROUND WATER CO-58 < 2.9 13-May-19 GROUND WATER FE-59 < 6.1 13-May-19 GROUND WATER CO-60 < 3.8 13-May-19 GROUND WATER ZN-65 < 5.9 13-May-19 GROUND WATER ZR-NB-95 < 3.2 13-May-19 GROUND WATER I-131 < 0.317 13-May-19 GROUND WATER CS-134 < 3.4 13-May-19 GROUND WATER CS-137 < 3.8 13-May-19 GROUND WATER BA-LA-140 < 4.9 13-May-19 GROUND WATER H-3 < 154.0 14-Aug-19 GROUND WATER MN-54 < 3.5 14-Aug-19 GROUND WATER CO-58 < 2.5 14-Aug-19 GROUND WATER FE-59 < 5.8 14-Aug-19 GROUND WATER CO-60 < 3.1 14-Aug-19 GROUND WATER ZN-65 < 6.3 2019 Annual Radiological Environmental Operating Report Page C - 39 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 14-Aug-19 GROUND WATER ZR-NB-95 < 3.2 14-Aug-19 GROUND WATER I-131 < 0.495 14-Aug-19 GROUND WATER CS-134 < 4.4 14-Aug-19 GROUND WATER CS-137 < 2.1 14-Aug-19 GROUND WATER BA-LA-140 < 3.6 14-Aug-19 GROUND WATER H-3 < 152.0 08-Oct-19 GROUND WATER MN-54 < 6.0 08-Oct-19 GROUND WATER CO-58 < 3.9 08-Oct-19 GROUND WATER FE-59 < 8.8 08-Oct-19 GROUND WATER CO-60 < 5.2 08-Oct-19 GROUND WATER ZN-65 < 8.9 08-Oct-19 GROUND WATER ZR-NB-95 < 3.3 08-Oct-19 GROUND WATER I-131 < 0.464 08-Oct-19 GROUND WATER CS-134 < 5.2 08-Oct-19 GROUND WATER CS-137 < 4.1 08-Oct-19 GROUND WATER BA-LA-140 < 3.3 08-Oct-19 GROUND WATER H-3 < 151.0 2019 Annual Radiological Environmental Operating Report Page C - 40 Wolf Creek Generating Station

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 07-Jan-19 MN-54 < 1.7 07-Jan-19 CO-58 < 1.7 07-Jan-19 FE-59 < 3.9 07-Jan-19 CO-60 < 1.9 07-Jan-19 ZN-65 < 4.3 07-Jan-19 ZR-NB-95 < 2.8 07-Jan-19 I-131 < 0.29 07-Jan-19 CS-134 < 2.9 07-Jan-19 CS-137 < 2.2 07-Jan-19 BA-LA-140 < 2.8 07-Jan-19 GROSS BETA 5.143 +/- 0.824 07-Jan-19 GROSS BETA 4.145 +/- 0.759 04-Feb-19 MN-54 < 2.9 04-Feb-19 CO-58 < 3.2 04-Feb-19 FE-59 < 6.4 04-Feb-19 CO-60 < 2.7 04-Feb-19 ZN-65 < 4.3 04-Feb-19 ZR-NB-95 < 2.8 04-Feb-19 I-131 < 0.465 04-Feb-19 CS-134 < 3.5 04-Feb-19 CS-137 < 1.9 04-Feb-19 BA-LA-140 < 3.3 04-Feb-19 GROSS BETA 2.651 +/- 0.653 12-Mar-19 MN-54 < 3.1 12-Mar-19 CO-58 < 2.5 12-Mar-19 FE-59 < 3.5 12-Mar-19 CO-60 < 2.6 12-Mar-19 ZN-65 < 4.1 12-Mar-19 ZR-NB-95 < 2.4 12-Mar-19 I-131 < 0.321 12-Mar-19 CS-134 < 3.4 12-Mar-19 CS-137 < 3.1 12-Mar-19 BA-LA-140 < 3.0 12-Mar-19 GROSS BETA 2.387 +/- 0.66 01-Apr-19 MN-54 < 3.0 01-Apr-19 CO-58 < 2.0 01-Apr-19 FE-59 < 5.2 01-Apr-19 CO-60 < 2.7 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 41

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Apr-19 ZN-65 < 5.4 01-Apr-19 ZR-NB-95 < 1.8 01-Apr-19 I-131 < 0.302 01-Apr-19 CS-134 < 3.1 01-Apr-19 CS-137 < 2.9 01-Apr-19 BA-LA-140 < 2.4 01-Apr-19 GROSS BETA 2.467 +/- 0.65 06-May-19 MN-54 < 3.3 06-May-19 CO-58 < 2.8 06-May-19 FE-59 < 2.6 06-May-19 CO-60 < 2.4 06-May-19 ZN-65 < 3.8 06-May-19 ZR-NB-95 < 3.2 06-May-19 I-131 < 0.287 06-May-19 CS-134 < 4.1 06-May-19 CS-137 < 2.4 06-May-19 BA-LA-140 < 1.8 06-May-19 GROSS BETA 1.965 +/- 0.611 03-Jun-19 MN-54 < 2.9 03-Jun-19 CO-58 < 2.0 03-Jun-19 FE-59 < 6.1 03-Jun-19 CO-60 < 1.1 03-Jun-19 ZN-65 < 5.1 03-Jun-19 ZR-NB-95 < 2.1 03-Jun-19 I-131 < 0.382 03-Jun-19 CS-134 < 4.0 03-Jun-19 CS-137 < 4.5 03-Jun-19 BA-LA-140 < 2.3 03-Jun-19 GROSS BETA 2.497 +/- 0.663 01-Jul-19 MN-54 < 2.4 01-Jul-19 CO-58 < 2.0 01-Jul-19 FE-59 < 3.6 01-Jul-19 CO-60 < 1.5 01-Jul-19 ZN-65 < 2.6 01-Jul-19 ZR-NB-95 < 2.3 01-Jul-19 I-131 < 0.3 01-Jul-19 CS-134 < 2.7 01-Jul-19 CS-137 < 3.1 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 42

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Jul-19 BA-LA-140 < 2.4 01-Jul-19 GROSS BETA 2.024 +/- 0.614 05-Aug-19 MN-54 < 3.5 05-Aug-19 CO-58 < 2.2 05-Aug-19 FE-59 < 6.9 05-Aug-19 CO-60 < 3.2 05-Aug-19 ZN-65 < 9.2 05-Aug-19 ZR-NB-95 < 3.1 05-Aug-19 I-131 < 0.293 05-Aug-19 CS-134 < 4.1 05-Aug-19 CS-137 < 3.6 05-Aug-19 BA-LA-140 < 2.9 05-Aug-19 GROSS BETA 2.391 +/- 0.615 03-Sep-19 MN-54 < 4.0 03-Sep-19 CO-58 < 4.5 03-Sep-19 FE-59 < 8.4 03-Sep-19 CO-60 < 3.8 03-Sep-19 ZN-65 < 6.2 03-Sep-19 ZR-NB-95 < 4.8 03-Sep-19 I-131 < 0.333 03-Sep-19 CS-134 < 4.5 03-Sep-19 CS-137 < 5.2 03-Sep-19 BA-LA-140 < 1.9 03-Sep-19 GROSS BETA 1.948 +/- 0.593 08-Oct-19 MN-54 < 2.4 08-Oct-19 CO-58 < 2.5 08-Oct-19 FE-59 < 3.2 08-Oct-19 CO-60 < 2.4 08-Oct-19 ZN-65 < 7.4 08-Oct-19 ZR-NB-95 < 3.2 08-Oct-19 I-131 < 0.432 08-Oct-19 CS-134 < 4.3 08-Oct-19 CS-137 < 2.8 08-Oct-19 BA-LA-140 < 3.1 08-Oct-19 GROSS BETA 3.711 +/- 0.72 05-Nov-19 MN-54 < 3.2 05-Nov-19 CO-58 < 3.1 05-Nov-19 FE-59 < 4.4 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 43

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 05-Nov-19 CO-60 < 2.3 05-Nov-19 ZN-65 < 3.5 05-Nov-19 ZR-NB-95 < 1.9 05-Nov-19 I-131 < 0.247 05-Nov-19 CS-134 < 3.2 05-Nov-19 CS-137 < 2.8 05-Nov-19 BA-LA-140 < 1.7 05-Nov-19 GROSS BETA 2.028 +/- 0.631 05-Dec-19 MN-54 < 5.5 05-Dec-19 CO-58 < 4.0 05-Dec-19 FE-59 < 6.6 05-Dec-19 CO-60 < 3.8 05-Dec-19 ZN-65 < 10.3 05-Dec-19 ZR-NB-95 < 4.6 05-Dec-19 I-131 < 0.457 05-Dec-19 CS-134 < 4.7 05-Dec-19 CS-137 < 3.3 05-Dec-19 BA-LA-140 < 6.4 05-Dec-19 GROSS BETA 2.318 +/- 0.627 07-Jan-20 MN-54 < 1.7 07-Jan-20 CO-58 < 2.7 07-Jan-20 FE-59 < 5.5 07-Jan-20 CO-60 < 1.9 07-Jan-20 ZN-65 < 2.7 07-Jan-20 ZR-NB-95 < 2.2 07-Jan-20 I-131 < 0.267 07-Jan-20 CS-134 < 4.1 07-Jan-20 CS-137 < 3.7 07-Jan-20 BA-LA-140 < 3.4 07-Jan-20 GROSS BETA 1.557 +/- 0.573 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 44

Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 07-Jan-19 MN-54 < 5.3 07-Jan-19 CO-58 < 3.2 07-Jan-19 FE-59 < 7.1 07-Jan-19 CO-60 < 3.9 07-Jan-19 ZN-65 < 8.0 07-Jan-19 ZR-NB-95 < 4.0 07-Jan-19 I-131 < 0.294 07-Jan-19 CS-134 < 4.9 07-Jan-19 CS-137 < 4.3 07-Jan-19 BA-LA-140 < 2.4 07-Jan-19 GROSS BETA 4.398 +/- 0.797 07-Jan-19 GROSS BETA 4.368 +/- 0.785 04-Feb-19 MN-54 < 2.9 04-Feb-19 CO-58 < 2.5 04-Feb-19 FE-59 < 3.4 04-Feb-19 CO-60 < 2.4 04-Feb-19 ZN-65 < 4.7 04-Feb-19 ZR-NB-95 < 4.0 04-Feb-19 I-131 < 0.484 04-Feb-19 CS-134 < 3.6 04-Feb-19 CS-137 < 2.3 04-Feb-19 BA-LA-140 < 2.6 04-Feb-19 GROSS BETA 2.735 +/- 0.675 12-Mar-19 MN-54 < 4.2 12-Mar-19 CO-58 < 2.4 12-Mar-19 FE-59 < 8.9 12-Mar-19 CO-60 < 3.9 12-Mar-19 ZN-65 < 5.6 12-Mar-19 ZR-NB-95 < 4.1 12-Mar-19 I-131 < 0.355 12-Mar-19 CS-134 < 4.8 12-Mar-19 CS-137 < 4.6 12-Mar-19 BA-LA-140 < 1.7 12-Mar-19 GROSS BETA 1.958 +/- 0.611 01-Apr-19 MN-54 < 3.0 01-Apr-19 CO-58 < 1.4 01-Apr-19 FE-59 < 3.8 01-Apr-19 CO-60 < 1.2 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 45

Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Apr-19 ZN-65 < 4.4 01-Apr-19 ZR-NB-95 < 3.6 01-Apr-19 I-131 < 0.294 01-Apr-19 CS-134 < 2.6 01-Apr-19 CS-137 < 3.0 01-Apr-19 BA-LA-140 < 2.4 01-Apr-19 GROSS BETA 1.994 +/- 0.632 06-May-19 MN-54 < 3.8 06-May-19 CO-58 < 2.2 06-May-19 FE-59 < 3.6 06-May-19 CO-60 < 2.1 06-May-19 ZN-65 < 3.9 06-May-19 ZR-NB-95 < 2.6 06-May-19 I-131 < 0.26 06-May-19 CS-134 < 4.0 06-May-19 CS-137 < 3.4 06-May-19 BA-LA-140 < 2.3 06-May-19 GROSS BETA 2.543 +/- 0.684 03-Jun-19 MN-54 < 4.3 03-Jun-19 CO-58 < 2.9 03-Jun-19 FE-59 < 5.3 03-Jun-19 CO-60 < 3.9 03-Jun-19 ZN-65 < 5.4 03-Jun-19 ZR-NB-95 < 3.0 03-Jun-19 I-131 < 0.386 03-Jun-19 CS-134 < 4.0 03-Jun-19 CS-137 < 3.8 03-Jun-19 BA-LA-140 < 4.3 03-Jun-19 GROSS BETA 1.940 +/- 0.611 01-Jul-19 MN-54 < 2.3 01-Jul-19 CO-58 < 3.3 01-Jul-19 FE-59 < 4.3 01-Jul-19 CO-60 < 1.6 01-Jul-19 ZN-65 < 3.4 01-Jul-19 ZR-NB-95 < 2.0 01-Jul-19 I-131 < 0.298 01-Jul-19 CS-134 < 3.2 01-Jul-19 CS-137 < 2.9 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 46

Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Jul-19 BA-LA-140 < 3.2 01-Jul-19 GROSS BETA < 0.888 05-Aug-19 MN-54 < 4.1 05-Aug-19 CO-58 < 4.4 05-Aug-19 FE-59 < 3.9 05-Aug-19 CO-60 < 1.8 05-Aug-19 ZN-65 < 3.6 05-Aug-19 ZR-NB-95 < 4.6 05-Aug-19 I-131 < 0.316 05-Aug-19 CS-134 < 4.3 05-Aug-19 CS-137 < 3.4 05-Aug-19 BA-LA-140 < 2.5 05-Aug-19 GROSS BETA 2.494 +/- 0.667 03-Sep-19 MN-54 < 2.1 03-Sep-19 CO-58 < 2.3 03-Sep-19 FE-59 < 4.3 03-Sep-19 CO-60 < 2.4 03-Sep-19 ZN-65 < 4.6 03-Sep-19 ZR-NB-95 < 3.1 03-Sep-19 I-131 < 0.482 03-Sep-19 CS-134 < 3.0 03-Sep-19 CS-137 < 1.7 03-Sep-19 BA-LA-140 < 2.1 03-Sep-19 GROSS BETA 2.413 +/- 0.654 08-Oct-19 MN-54 < 2.0 08-Oct-19 CO-58 < 2.4 08-Oct-19 FE-59 < 3.9 08-Oct-19 CO-60 < 2.0 08-Oct-19 ZN-65 < 4.5 08-Oct-19 ZR-NB-95 < 3.4 08-Oct-19 I-131 < 0.379 08-Oct-19 CS-134 < 3.5 08-Oct-19 CS-137 < 2.3 08-Oct-19 BA-LA-140 < 3.0 08-Oct-19 GROSS BETA 2.917 +/- 0.679 05-Nov-19 MN-54 < 3.0 05-Nov-19 CO-58 < 2.2 05-Nov-19 FE-59 < 3.8 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 47

Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 05-Nov-19 CO-60 < 2.3 05-Nov-19 ZN-65 < 3.6 05-Nov-19 ZR-NB-95 < 2.6 05-Nov-19 I-131 < 0.285 05-Nov-19 CS-134 < 3.2 05-Nov-19 CS-137 < 2.2 05-Nov-19 BA-LA-140 < 3.1 05-Nov-19 GROSS BETA 2.290 +/- 0.659 05-Dec-19 MN-54 < 3.2 05-Dec-19 CO-58 < 2.1 05-Dec-19 FE-59 < 3.6 05-Dec-19 CO-60 < 2.5 05-Dec-19 ZN-65 < 2.4 05-Dec-19 ZR-NB-95 < 3.7 05-Dec-19 I-131 < 0.462 05-Dec-19 CS-134 < 3.2 05-Dec-19 CS-137 < 2.3 05-Dec-19 BA-LA-140 < 3.7 05-Dec-19 GROSS BETA 2.771 +/- 0.7 07-Jan-20 MN-54 < 2.9 07-Jan-20 CO-58 < 3.0 07-Jan-20 FE-59 < 3.2 07-Jan-20 CO-60 < 2.1 07-Jan-20 ZN-65 < 5.3 07-Jan-20 ZR-NB-95 < 3.2 07-Jan-20 I-131 < 0.259 07-Jan-20 CS-134 < 3.3 07-Jan-20 CS-137 < 2.6 07-Jan-20 BA-LA-140 < 1.8 07-Jan-20 GROSS BETA 1.898 +/- 0.632 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 48

Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 07-Jan-19 H-3 < 147 01-Apr-19 H-3 < 155 01-Jul-19 H-3 < 149 01-Jul-19 H-3 < 149 Duplicate 08-Oct-19 H-3 < 151 07-Jan-20 H-3 < 157 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 49

Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: IO-DW Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 07-Jan-19 H-3 < 147 01-Apr-19 H-3 < 155 01-Jul-19 H-3 < 149 08-Oct-19 H-3 < 151 07-Jan-20 H-3 < 157 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 50

Exposure Pathway - Waterborne Shoreline Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 23-May-19 SHORELINE SEDIMENTS K-40 8,940.9 +/- 698.2 23-May-19 SHORELINE SEDIMENTS MN-54 < 25.9 23-May-19 SHORELINE SEDIMENTS CO-58 < 33.2 23-May-19 SHORELINE SEDIMENTS FE-59 < 53.6 23-May-19 SHORELINE SEDIMENTS CO-60 < 17.6 23-May-19 SHORELINE SEDIMENTS ZN-65 < 53.0 23-May-19 SHORELINE SEDIMENTS CS-134 < 23.0 23-May-19 SHORELINE SEDIMENTS CS-137 196.8 +/- 31.8 22-Oct-19 SHORELINE SEDIMENTS K-40 5,671.7 +/- 458.3 22-Oct-19 SHORELINE SEDIMENTS MN-54 < 18.7 22-Oct-19 SHORELINE SEDIMENTS CO-58 < 21.7 22-Oct-19 SHORELINE SEDIMENTS FE-59 < 46.0 22-Oct-19 SHORELINE SEDIMENTS CO-60 < 15.1 22-Oct-19 SHORELINE SEDIMENTS ZN-65 < 29.8 22-Oct-19 SHORELINE SEDIMENTS CS-134 < 11.5 22-Oct-19 SHORELINE SEDIMENTS CS-137 < 16.7 2019 Annual Radiological Environmental Operating Report Page C - 51 Wolf Creek Generating Station

Exposure Pathway - Waterborne Shoreline Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 27-Jun-19 SHORELINE SEDIMENTS K-40 10,012.0 +/- 538.7 27-Jun-19 SHORELINE SEDIMENTS MN-54 < 25.6 27-Jun-19 SHORELINE SEDIMENTS CO-58 < 23.0 27-Jun-19 SHORELINE SEDIMENTS FE-59 < 45.1 27-Jun-19 SHORELINE SEDIMENTS CO-60 < 16.7 27-Jun-19 SHORELINE SEDIMENTS ZN-65 < 44.6 27-Jun-19 SHORELINE SEDIMENTS CS-134 < 17.1 27-Jun-19 SHORELINE SEDIMENTS CS-137 147.7 +/- 27.1 16-Oct-19 SHORELINE SEDIMENTS K-40 11,270.0 +/- 707.4 16-Oct-19 SHORELINE SEDIMENTS MN-54 < 30.0 16-Oct-19 SHORELINE SEDIMENTS CO-58 < 32.8 16-Oct-19 SHORELINE SEDIMENTS FE-59 < 86.4 16-Oct-19 SHORELINE SEDIMENTS CO-60 < 21.5 16-Oct-19 SHORELINE SEDIMENTS ZN-65 < 56.3 16-Oct-19 SHORELINE SEDIMENTS CS-134 < 22.9 16-Oct-19 SHORELINE SEDIMENTS CS-137 < 22.3 2019 Annual Radiological Environmental Operating Report Page C - 52 Wolf Creek Generating Station

Exposure Pathway - Waterborne Shoreline Sediment Location: SC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 01-May-19 SHORELINE SEDIMENTS K-40 9,844.2 +/- 531.2 01-May-19 SHORELINE SEDIMENTS MN-54 < 28.4 01-May-19 SHORELINE SEDIMENTS CO-58 < 21.4 01-May-19 SHORELINE SEDIMENTS FE-59 < 41.8 01-May-19 SHORELINE SEDIMENTS CO-60 < 15.6 01-May-19 SHORELINE SEDIMENTS ZN-65 < 39.2 01-May-19 SHORELINE SEDIMENTS CS-134 < 17.2 01-May-19 SHORELINE SEDIMENTS CS-137 < 15.8 2019 Annual Radiological Environmental Operating Report Page C - 53 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 20-Mar-19 CHANNEL CATFISH K-40 3,529.9 +/- 469.6 20-Mar-19 CHANNEL CATFISH MN-54 < 15.5 20-Mar-19 CHANNEL CATFISH CO-58 < 13.6 20-Mar-19 CHANNEL CATFISH FE-59 < 27.5 20-Mar-19 CHANNEL CATFISH CO-60 < 18.0 20-Mar-19 CHANNEL CATFISH ZN-65 < 54.9 20-Mar-19 CHANNEL CATFISH I-131 < 24.3 20-Mar-19 CHANNEL CATFISH CS-134 < 18.6 20-Mar-19 CHANNEL CATFISH CS-137 < 22.5 20-Mar-19 CHANNEL CATFISH H-3 6,209.0 +/- 210.0 20-Mar-19 FRESHWATER DRUM K-40 3,213.0 +/- 450.9 20-Mar-19 FRESHWATER DRUM MN-54 < 12.3 20-Mar-19 FRESHWATER DRUM CO-58 < 17.0 20-Mar-19 FRESHWATER DRUM FE-59 < 21.1 20-Mar-19 FRESHWATER DRUM CO-60 < 16.0 20-Mar-19 FRESHWATER DRUM ZN-65 < 17.9 20-Mar-19 FRESHWATER DRUM I-131 < 35.3 20-Mar-19 FRESHWATER DRUM CS-134 < 20.0 20-Mar-19 FRESHWATER DRUM CS-137 < 12.8 20-Mar-19 FRESHWATER DRUM H-3 5,106.0 +/- 170.0 20-Mar-19 LARGEMOUTH BASS K-40 3,909.7 +/- 481.1 20-Mar-19 LARGEMOUTH BASS MN-54 < 18.8 20-Mar-19 LARGEMOUTH BASS CO-58 < 14.1 20-Mar-19 LARGEMOUTH BASS FE-59 < 31.7 20-Mar-19 LARGEMOUTH BASS CO-60 < 12.7 20-Mar-19 LARGEMOUTH BASS ZN-65 < 20.1 20-Mar-19 LARGEMOUTH BASS I-131 < 35.5 20-Mar-19 LARGEMOUTH BASS CS-134 < 16.9 20-Mar-19 LARGEMOUTH BASS CS-137 < 19.2 20-Mar-19 LARGEMOUTH BASS H-3 5,984.0 +/- 201.0 20-Mar-19 SMALLMOUTH BUFFALO K-40 3,570.0 +/- 424.0 20-Mar-19 SMALLMOUTH BUFFALO MN-54 < 16.6 20-Mar-19 SMALLMOUTH BUFFALO CO-58 < 14.5 20-Mar-19 SMALLMOUTH BUFFALO FE-59 < 22.5 20-Mar-19 SMALLMOUTH BUFFALO CO-60 < 10.1 20-Mar-19 SMALLMOUTH BUFFALO ZN-65 < 16.0 20-Mar-19 SMALLMOUTH BUFFALO I-131 < 25.9 20-Mar-19 SMALLMOUTH BUFFALO CS-134 < 14.3 2019 Annual Radiological Environmental Operating Report Page C - 54 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 20-Mar-19 SMALLMOUTH BUFFALO CS-137 < 11.2 20-Mar-19 SMALLMOUTH BUFFALO H-3 6,489.0 +/- 214.0 20-Mar-19 WHITE BASS K-40 3,656.7 +/- 476.9 20-Mar-19 WHITE BASS MN-54 < 27.3 20-Mar-19 WHITE BASS CO-58 < 23.2 20-Mar-19 WHITE BASS FE-59 < 35.6 20-Mar-19 WHITE BASS CO-60 < 15.7 20-Mar-19 WHITE BASS ZN-65 < 42.9 20-Mar-19 WHITE BASS I-131 < 44.1 20-Mar-19 WHITE BASS CS-134 < 23.6 20-Mar-19 WHITE BASS CS-137 < 22.8 20-Mar-19 WHITE BASS H-3 6,128.0 +/- 208.0 24-Oct-19 BLUE CATFISH K-40 3,868.5 +/- 663.8 24-Oct-19 BLUE CATFISH MN-54 < 29.2 24-Oct-19 BLUE CATFISH CO-58 < 31.4 24-Oct-19 BLUE CATFISH FE-59 < 55.9 24-Oct-19 BLUE CATFISH CO-60 < 28.0 24-Oct-19 BLUE CATFISH ZN-65 < 119.6 24-Oct-19 BLUE CATFISH I-131 < 74.0 24-Oct-19 BLUE CATFISH CS-134 < 40.0 24-Oct-19 BLUE CATFISH CS-137 < 36.7 24-Oct-19 BLUE CATFISH H-3 8,353.0 +/- 247.0 24-Oct-19 CHANNEL CATFISH K-40 3,804.1 +/- 512.2 24-Oct-19 CHANNEL CATFISH MN-54 < 15.3 24-Oct-19 CHANNEL CATFISH CO-58 < 17.4 24-Oct-19 CHANNEL CATFISH FE-59 < 26.4 24-Oct-19 CHANNEL CATFISH CO-60 < 12.6 24-Oct-19 CHANNEL CATFISH ZN-65 < 38.6 24-Oct-19 CHANNEL CATFISH I-131 < 20.6 24-Oct-19 CHANNEL CATFISH CS-134 < 18.3 24-Oct-19 CHANNEL CATFISH CS-137 < 22.0 24-Oct-19 CHANNEL CATFISH H-3 8,384.0 +/- 254.0 24-Oct-19 COMMON CARP K-40 4,200.0 +/- 506.1 24-Oct-19 COMMON CARP MN-54 < 17.7 24-Oct-19 COMMON CARP CO-58 < 18.0 24-Oct-19 COMMON CARP FE-59 < 22.1 24-Oct-19 COMMON CARP CO-60 < 21.2 24-Oct-19 COMMON CARP ZN-65 < 38.9 2019 Annual Radiological Environmental Operating Report Page C - 55 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 24-Oct-19 COMMON CARP I-131 < 25.3 24-Oct-19 COMMON CARP CS-134 < 24.3 24-Oct-19 COMMON CARP CS-137 < 15.8 24-Oct-19 COMMON CARP H-3 8,079.0 +/- 247.0 24-Oct-19 DRUM K-40 3,867.7 +/- 614.6 24-Oct-19 DRUM MN-54 < 18.2 24-Oct-19 DRUM CO-58 < 16.2 24-Oct-19 DRUM FE-59 < 27.3 24-Oct-19 DRUM CO-60 < 21.2 24-Oct-19 DRUM ZN-65 < 30.0 24-Oct-19 DRUM I-131 < 34.3 24-Oct-19 DRUM CS-134 < 24.0 24-Oct-19 DRUM CS-137 < 25.2 24-Oct-19 DRUM H-3 8,260.0 +/- 250.0 24-Oct-19 WALLEYE K-40 4,478.3 +/- 508.8 24-Oct-19 WALLEYE MN-54 < 18.3 24-Oct-19 WALLEYE CO-58 < 9.8 24-Oct-19 WALLEYE FE-59 < 38.8 24-Oct-19 WALLEYE CO-60 < 9.3 24-Oct-19 WALLEYE ZN-65 < 34.0 24-Oct-19 WALLEYE I-131 < 25.1 24-Oct-19 WALLEYE CS-134 < 18.2 24-Oct-19 WALLEYE CS-137 < 17.2 24-Oct-19 WALLEYE H-3 9,861.0 +/- 269.0 24-Oct-19 WHITE BASS K-40 3,609.3 +/- 486.6 24-Oct-19 WHITE BASS MN-54 < 16.2 24-Oct-19 WHITE BASS CO-58 < 11.8 24-Oct-19 WHITE BASS FE-59 < 28.0 24-Oct-19 WHITE BASS CO-60 < 15.2 24-Oct-19 WHITE BASS ZN-65 < 44.0 24-Oct-19 WHITE BASS I-131 < 33.4 24-Oct-19 WHITE BASS CS-134 < 19.1 24-Oct-19 WHITE BASS CS-137 < 17.4 24-Oct-19 WHITE BASS H-3 9,263.0 +/- 267.0 2019 Annual Radiological Environmental Operating Report Page C - 56 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 05-Jun-19 BIGMOUTH BUFFALO K-40 4,224.9 +/- 462.0 05-Jun-19 BIGMOUTH BUFFALO MN-54 < 12.8 05-Jun-19 BIGMOUTH BUFFALO CO-58 < 10.0 05-Jun-19 BIGMOUTH BUFFALO FE-59 < 21.8 05-Jun-19 BIGMOUTH BUFFALO CO-60 < 10.1 05-Jun-19 BIGMOUTH BUFFALO ZN-65 < 13.9 05-Jun-19 BIGMOUTH BUFFALO I-131 < 23.6 05-Jun-19 BIGMOUTH BUFFALO CS-134 < 15.7 05-Jun-19 BIGMOUTH BUFFALO CS-137 < 18.1 05-Jun-19 BIGMOUTH BUFFALO H-3 < 124.0 05-Jun-19 CHANNEL CATFISH K-40 4,283.4 +/- 484.4 05-Jun-19 CHANNEL CATFISH MN-54 < 14.3 05-Jun-19 CHANNEL CATFISH CO-58 < 13.7 05-Jun-19 CHANNEL CATFISH FE-59 < 26.6 05-Jun-19 CHANNEL CATFISH CO-60 < 9.4 05-Jun-19 CHANNEL CATFISH ZN-65 < 28.5 05-Jun-19 CHANNEL CATFISH I-131 < 16.9 05-Jun-19 CHANNEL CATFISH CS-134 < 15.8 05-Jun-19 CHANNEL CATFISH CS-137 < 15.7 05-Jun-19 CHANNEL CATFISH H-3 < 121.0 05-Jun-19 COMMON CARP K-40 4,048.2 +/- 465.3 05-Jun-19 COMMON CARP MN-54 < 14.8 05-Jun-19 COMMON CARP CO-58 < 13.1 05-Jun-19 COMMON CARP FE-59 < 20.8 05-Jun-19 COMMON CARP CO-60 < 11.7 05-Jun-19 COMMON CARP ZN-65 < 41.5 05-Jun-19 COMMON CARP I-131 < 28.9 05-Jun-19 COMMON CARP CS-134 < 19.5 05-Jun-19 COMMON CARP CS-137 < 21.6 05-Jun-19 COMMON CARP H-3 < 121.0 05-Jun-19 SMALLMOUTH BUFFALO K-40 4,539.9 +/- 456.1 05-Jun-19 SMALLMOUTH BUFFALO MN-54 < 16.6 05-Jun-19 SMALLMOUTH BUFFALO CO-58 < 20.9 05-Jun-19 SMALLMOUTH BUFFALO FE-59 < 33.1 05-Jun-19 SMALLMOUTH BUFFALO CO-60 < 12.0 05-Jun-19 SMALLMOUTH BUFFALO ZN-65 < 25.2 05-Jun-19 SMALLMOUTH BUFFALO I-131 < 24.4 05-Jun-19 SMALLMOUTH BUFFALO CS-134 < 14.3 2019 Annual Radiological Environmental Operating Report Page C - 57 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 05-Jun-19 SMALLMOUTH BUFFALO CS-137 < 16.4 05-Jun-19 SMALLMOUTH BUFFALO H-3 < 124.0 16-Oct-19 CATFISH K-40 3,729.4 +/- 486.5 16-Oct-19 CATFISH MN-54 < 14.0 16-Oct-19 CATFISH CO-58 < 19.6 16-Oct-19 CATFISH FE-59 < 30.5 16-Oct-19 CATFISH CO-60 < 13.5 16-Oct-19 CATFISH ZN-65 < 22.3 16-Oct-19 CATFISH I-131 < 28.3 16-Oct-19 CATFISH CS-134 < 18.1 16-Oct-19 CATFISH CS-137 < 10.9 16-Oct-19 CATFISH H-3 < 123.0 16-Oct-19 COMMON CARP K-40 3,803.4 +/- 489.6 16-Oct-19 COMMON CARP MN-54 < 21.9 16-Oct-19 COMMON CARP CO-58 < 17.1 16-Oct-19 COMMON CARP FE-59 < 30.5 16-Oct-19 COMMON CARP CO-60 < 20.0 16-Oct-19 COMMON CARP ZN-65 < 19.5 16-Oct-19 COMMON CARP I-131 < 34.2 16-Oct-19 COMMON CARP CS-134 < 19.8 16-Oct-19 COMMON CARP CS-137 < 17.3 16-Oct-19 COMMON CARP H-3 < 120.0 16-Oct-19 CRAPPIE K-40 4,504.2 +/- 516.7 16-Oct-19 CRAPPIE MN-54 < 23.2 16-Oct-19 CRAPPIE CO-58 < 15.5 16-Oct-19 CRAPPIE FE-59 < 28.2 16-Oct-19 CRAPPIE CO-60 < 17.4 16-Oct-19 CRAPPIE ZN-65 < 19.2 16-Oct-19 CRAPPIE I-131 < 46.3 16-Oct-19 CRAPPIE CS-134 < 22.3 16-Oct-19 CRAPPIE CS-137 < 11.3 16-Oct-19 CRAPPIE H-3 < 121.0 16-Oct-19 DRUM K-40 3,410.2 +/- 481.1 16-Oct-19 DRUM MN-54 < 19.7 16-Oct-19 DRUM CO-58 < 14.9 16-Oct-19 DRUM FE-59 < 31.3 16-Oct-19 DRUM CO-60 < 17.8 16-Oct-19 DRUM ZN-65 < 16.0 2019 Annual Radiological Environmental Operating Report Page C - 58 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 16-Oct-19 DRUM I-131 < 31.8 16-Oct-19 DRUM CS-134 < 17.9 16-Oct-19 DRUM CS-137 < 14.4 16-Oct-19 DRUM H-3 < 125.0 16-Oct-19 RIVER CARP SUCKER K-40 3,852.2 +/- 481.8 16-Oct-19 RIVER CARP SUCKER MN-54 < 16.2 16-Oct-19 RIVER CARP SUCKER CO-58 < 18.0 16-Oct-19 RIVER CARP SUCKER FE-59 < 47.0 16-Oct-19 RIVER CARP SUCKER CO-60 < 10.4 16-Oct-19 RIVER CARP SUCKER ZN-65 < 20.3 16-Oct-19 RIVER CARP SUCKER I-131 < 26.8 16-Oct-19 RIVER CARP SUCKER CS-134 < 15.0 16-Oct-19 RIVER CARP SUCKER CS-137 < 20.8 16-Oct-19 RIVER CARP SUCKER H-3 < 123.0 16-Oct-19 SMALLMOUTH BUFFALO K-40 3,911.5 +/- 475.4 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO K-40 2,584.5 +/- 419.2 16-Oct-19 SMALLMOUTH BUFFALO MN-54 < 16.6 16-Oct-19 SMALLMOUTH BUFFALO MN-54 < 14.2 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO CO-58 < 14.0 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO CO-58 < 14.2 16-Oct-19 SMALLMOUTH BUFFALO FE-59 < 27.1 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO FE-59 < 24.7 16-Oct-19 SMALLMOUTH BUFFALO CO-60 < 10.4 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO CO-60 < 11.5 16-Oct-19 SMALLMOUTH BUFFALO ZN-65 < 26.9 16-Oct-19 SMALLMOUTH BUFFALO ZN-65 < 37.8 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO I-131 < 31.7 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO I-131 < 32.2 16-Oct-19 SMALLMOUTH BUFFALO CS-134 < 18.7 16-Oct-19 SMALLMOUTH BUFFALO CS-134 < 22.1 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO CS-137 < 16.7 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO CS-137 < 19.5 16-Oct-19 SMALLMOUTH BUFFALO H-3 < 111.0 Duplicate 16-Oct-19 SMALLMOUTH BUFFALO H-3 < 111.0 2019 Annual Radiological Environmental Operating Report Page C - 59 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-Jun-19 HORSERADISH LEAVES BE-7 1,406.7 +/- 300.8 12-Jun-19 HORSERADISH LEAVES K-40 5,359.3 +/- 654.9 12-Jun-19 HORSERADISH LEAVES MN-54 < 14.2 12-Jun-19 HORSERADISH LEAVES CO-58 < 18.5 12-Jun-19 HORSERADISH LEAVES FE-59 < 38.7 12-Jun-19 HORSERADISH LEAVES CO-60 < 20.8 12-Jun-19 HORSERADISH LEAVES ZN-65 < 48.2 12-Jun-19 HORSERADISH LEAVES ZR-NB-95 < 22.2 12-Jun-19 HORSERADISH LEAVES I-131 < 35.4 12-Jun-19 HORSERADISH LEAVES CS-134 < 28.6 12-Jun-19 HORSERADISH LEAVES CS-137 < 24.6 15-Jul-19 HORSERADISH LEAVES BE-7 2,098.2 +/- 455.9 15-Jul-19 HORSERADISH LEAVES K-40 8,745.7 +/- 869.6 15-Jul-19 HORSERADISH LEAVES MN-54 < 36.3 15-Jul-19 HORSERADISH LEAVES CO-58 < 35.4 15-Jul-19 HORSERADISH LEAVES FE-59 < 89.5 15-Jul-19 HORSERADISH LEAVES CO-60 < 14.2 15-Jul-19 HORSERADISH LEAVES ZN-65 < 72.3 15-Jul-19 HORSERADISH LEAVES ZR-NB-95 < 33.2 15-Jul-19 HORSERADISH LEAVES I-131 < 58.9 15-Jul-19 HORSERADISH LEAVES CS-134 < 29.9 15-Jul-19 HORSERADISH LEAVES CS-137 < 29.7 28-Oct-19 HORSERADISH LEAVES BE-7 1,293.3 +/- 373.0 28-Oct-19 HORSERADISH LEAVES K-40 5,430.7 +/- 715.7 28-Oct-19 HORSERADISH LEAVES MN-54 < 26.9 28-Oct-19 HORSERADISH LEAVES CO-58 < 14.4 28-Oct-19 HORSERADISH LEAVES FE-59 < 55.3 28-Oct-19 HORSERADISH LEAVES CO-60 < 21.3 28-Oct-19 HORSERADISH LEAVES ZN-65 < 32.2 28-Oct-19 HORSERADISH LEAVES ZR-NB-95 < 28.6 28-Oct-19 HORSERADISH LEAVES I-131 < 29.1 28-Oct-19 HORSERADISH LEAVES CS-134 < 29.1 28-Oct-19 HORSERADISH LEAVES CS-137 < 25.3 2019 Annual Radiological Environmental Operating Report Page C - 60 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 28-May-19 HORSERADISH LEAVES BE-7 2,618.9 +/- 256.6 28-May-19 HORSERADISH LEAVES K-40 4,720.3 +/- 404.3 28-May-19 HORSERADISH LEAVES MN-54 < 19.7 28-May-19 HORSERADISH LEAVES CO-58 < 17.1 28-May-19 HORSERADISH LEAVES FE-59 < 46.0 28-May-19 HORSERADISH LEAVES CO-60 < 11.9 28-May-19 HORSERADISH LEAVES ZN-65 < 44.2 28-May-19 HORSERADISH LEAVES ZR-NB-95 < 11.1 28-May-19 HORSERADISH LEAVES I-131 < 33.2 28-May-19 HORSERADISH LEAVES CS-134 < 16.5 28-May-19 HORSERADISH LEAVES CS-137 < 19.5 12-Jun-19 HORSERADISH LEAVES BE-7 2,091.0 +/- 409.2 12-Jun-19 HORSERADISH LEAVES K-40 6,703.7 +/- 663.8 12-Jun-19 HORSERADISH LEAVES MN-54 < 33.6 12-Jun-19 HORSERADISH LEAVES CO-58 < 15.6 12-Jun-19 HORSERADISH LEAVES FE-59 < 49.1 12-Jun-19 HORSERADISH LEAVES CO-60 < 30.0 12-Jun-19 HORSERADISH LEAVES ZN-65 < 26.4 12-Jun-19 HORSERADISH LEAVES ZR-NB-95 < 21.3 12-Jun-19 HORSERADISH LEAVES I-131 < 51.8 12-Jun-19 HORSERADISH LEAVES CS-134 < 28.6 12-Jun-19 HORSERADISH LEAVES CS-137 < 21.1 15-Jul-19 HORSERADISH LEAVES BE-7 1,452.1 +/- 318.1 15-Jul-19 HORSERADISH LEAVES K-40 6,908.7 +/- 681.1 15-Jul-19 HORSERADISH LEAVES MN-54 < 21.9 15-Jul-19 HORSERADISH LEAVES CO-58 < 23.0 15-Jul-19 HORSERADISH LEAVES FE-59 < 56.8 15-Jul-19 HORSERADISH LEAVES CO-60 < 19.0 15-Jul-19 HORSERADISH LEAVES ZN-65 < 30.8 15-Jul-19 HORSERADISH LEAVES ZR-NB-95 < 17.4 15-Jul-19 HORSERADISH LEAVES I-131 < 52.6 15-Jul-19 HORSERADISH LEAVES CS-134 < 23.7 15-Jul-19 HORSERADISH LEAVES CS-137 < 20.2 23-Sep-19 HORSERADISH LEAVES BE-7 1,053.8 +/- 353.4 23-Sep-19 HORSERADISH LEAVES K-40 6,378.1 +/- 788.7 23-Sep-19 HORSERADISH LEAVES MN-54 < 32.5 23-Sep-19 HORSERADISH LEAVES CO-58 < 28.5 23-Sep-19 HORSERADISH LEAVES FE-59 < 56.0 2019 Annual Radiological Environmental Operating Report Page C - 61 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 23-Sep-19 HORSERADISH LEAVES CO-60 < 21.8 23-Sep-19 HORSERADISH LEAVES ZN-65 < 67.9 23-Sep-19 HORSERADISH LEAVES ZR-NB-95 < 19.7 23-Sep-19 HORSERADISH LEAVES I-131 < 45.1 23-Sep-19 HORSERADISH LEAVES CS-134 < 33.0 23-Sep-19 HORSERADISH LEAVES CS-137 < 29.7 28-Oct-19 HORSERADISH LEAVES BE-7 1,283.4 +/- 402.2 28-Oct-19 HORSERADISH LEAVES K-40 5,017.9 +/- 609.1 28-Oct-19 HORSERADISH LEAVES MN-54 < 19.4 28-Oct-19 HORSERADISH LEAVES CO-58 < 23.1 28-Oct-19 HORSERADISH LEAVES FE-59 < 31.5 28-Oct-19 HORSERADISH LEAVES CO-60 < 18.2 28-Oct-19 HORSERADISH LEAVES ZN-65 < 38.7 28-Oct-19 HORSERADISH LEAVES ZR-NB-95 < 13.2 28-Oct-19 HORSERADISH LEAVES I-131 < 39.8 28-Oct-19 HORSERADISH LEAVES CS-134 < 24.8 28-Oct-19 HORSERADISH LEAVES CS-137 < 26.5 2019 Annual Radiological Environmental Operating Report Page C - 62 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 28-May-19 HORSERADISH LEAVES BE-7 1,734.9 +/- 311.7 28-May-19 HORSERADISH LEAVES K-40 3,981.2 +/- 548.4 28-May-19 HORSERADISH LEAVES MN-54 < 17.6 28-May-19 HORSERADISH LEAVES CO-58 < 20.0 28-May-19 HORSERADISH LEAVES FE-59 < 31.3 28-May-19 HORSERADISH LEAVES CO-60 < 11.7 28-May-19 HORSERADISH LEAVES ZN-65 < 32.4 28-May-19 HORSERADISH LEAVES ZR-NB-95 < 13.6 28-May-19 HORSERADISH LEAVES I-131 < 42.6 28-May-19 HORSERADISH LEAVES CS-134 < 22.1 28-May-19 HORSERADISH LEAVES CS-137 < 24.6 12-Jun-19 HORSERADISH LEAVES BE-7 2,407.3 +/- 428.5 12-Jun-19 HORSERADISH LEAVES K-40 7,183.6 +/- 773.5 12-Jun-19 HORSERADISH LEAVES MN-54 < 24.8 12-Jun-19 HORSERADISH LEAVES CO-58 < 24.7 12-Jun-19 HORSERADISH LEAVES FE-59 < 72.0 12-Jun-19 HORSERADISH LEAVES CO-60 < 16.7 12-Jun-19 HORSERADISH LEAVES ZN-65 < 47.1 12-Jun-19 HORSERADISH LEAVES ZR-NB-95 < 24.5 12-Jun-19 HORSERADISH LEAVES I-131 < 41.7 12-Jun-19 HORSERADISH LEAVES CS-134 < 30.5 12-Jun-19 HORSERADISH LEAVES CS-137 < 26.6 15-Jul-19 HORSERADISH LEAVES BE-7 2,299.4 +/- 307.8 15-Jul-19 HORSERADISH LEAVES K-40 8,365.4 +/- 620.4 15-Jul-19 HORSERADISH LEAVES MN-54 < 21.4 15-Jul-19 HORSERADISH LEAVES CO-58 < 24.8 15-Jul-19 HORSERADISH LEAVES FE-59 < 55.4 15-Jul-19 HORSERADISH LEAVES CO-60 < 22.1 15-Jul-19 HORSERADISH LEAVES ZN-65 < 40.4 15-Jul-19 HORSERADISH LEAVES ZR-NB-95 < 13.3 15-Jul-19 HORSERADISH LEAVES I-131 < 44.8 15-Jul-19 HORSERADISH LEAVES CS-134 < 23.9 15-Jul-19 HORSERADISH LEAVES CS-137 < 26.2 19-Aug-19 HORSERADISH LEAVES BE-7 3,356.5 +/- 488.7 19-Aug-19 HORSERADISH LEAVES K-40 9,245.6 +/- 1,020.0 19-Aug-19 HORSERADISH LEAVES MN-54 < 38.0 19-Aug-19 HORSERADISH LEAVES CO-58 < 18.6 19-Aug-19 HORSERADISH LEAVES FE-59 < 50.7 2019 Annual Radiological Environmental Operating Report Page C - 63 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Aug-19 HORSERADISH LEAVES CO-60 < 21.6 19-Aug-19 HORSERADISH LEAVES ZN-65 < 40.2 19-Aug-19 HORSERADISH LEAVES ZR-NB-95 < 30.8 19-Aug-19 HORSERADISH LEAVES I-131 < 32.1 19-Aug-19 HORSERADISH LEAVES CS-134 < 34.2 19-Aug-19 HORSERADISH LEAVES CS-137 < 33.9 23-Sep-19 HORSERADISH LEAVES BE-7 963.4 +/- 311.9 23-Sep-19 HORSERADISH LEAVES K-40 8,289.3 +/- 679.8 23-Sep-19 HORSERADISH LEAVES MN-54 < 25.8 23-Sep-19 HORSERADISH LEAVES CO-58 < 22.2 23-Sep-19 HORSERADISH LEAVES FE-59 < 39.7 23-Sep-19 HORSERADISH LEAVES CO-60 < 27.0 23-Sep-19 HORSERADISH LEAVES ZN-65 < 56.3 23-Sep-19 HORSERADISH LEAVES ZR-NB-95 < 23.6 23-Sep-19 HORSERADISH LEAVES I-131 < 44.1 23-Sep-19 HORSERADISH LEAVES CS-134 < 29.6 23-Sep-19 HORSERADISH LEAVES CS-137 < 27.3 28-Oct-19 HORSERADISH LEAVES BE-7 1,321.7 +/- 201.0 28-Oct-19 HORSERADISH LEAVES K-40 5,697.6 +/- 537.5 28-Oct-19 HORSERADISH LEAVES MN-54 < 17.2 28-Oct-19 HORSERADISH LEAVES CO-58 < 10.6 28-Oct-19 HORSERADISH LEAVES FE-59 < 31.3 28-Oct-19 HORSERADISH LEAVES CO-60 < 13.7 28-Oct-19 HORSERADISH LEAVES ZN-65 < 38.1 28-Oct-19 HORSERADISH LEAVES ZR-NB-95 < 17.8 28-Oct-19 HORSERADISH LEAVES I-131 < 19.7 28-Oct-19 HORSERADISH LEAVES CS-134 < 16.1 28-Oct-19 HORSERADISH LEAVES CS-137 < 20.2 2019 Annual Radiological Environmental Operating Report Page C - 64 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 28-May-19 HORSERADISH LEAVES BE-7 1,851.6 +/- 176.7 28-May-19 HORSERADISH LEAVES K-40 4,419.6 +/- 296.6 28-May-19 HORSERADISH LEAVES MN-54 < 11.3 28-May-19 HORSERADISH LEAVES CO-58 < 11.8 28-May-19 HORSERADISH LEAVES FE-59 < 13.8 28-May-19 HORSERADISH LEAVES CO-60 < 7.3 28-May-19 HORSERADISH LEAVES ZN-65 < 20.5 28-May-19 HORSERADISH LEAVES ZR-NB-95 < 11.3 28-May-19 HORSERADISH LEAVES I-131 < 25.2 28-May-19 HORSERADISH LEAVES CS-134 < 11.6 28-May-19 HORSERADISH LEAVES CS-137 < 11.0 12-Jun-19 HORSERADISH LEAVES BE-7 1,601.6 +/- 363.7 12-Jun-19 HORSERADISH LEAVES K-40 6,717.5 +/- 666.0 12-Jun-19 HORSERADISH LEAVES MN-54 < 17.3 12-Jun-19 HORSERADISH LEAVES CO-58 < 27.8 12-Jun-19 HORSERADISH LEAVES FE-59 < 42.3 12-Jun-19 HORSERADISH LEAVES CO-60 < 17.2 12-Jun-19 HORSERADISH LEAVES ZN-65 < 57.0 12-Jun-19 HORSERADISH LEAVES ZR-NB-95 < 34.6 12-Jun-19 HORSERADISH LEAVES I-131 < 57.4 12-Jun-19 HORSERADISH LEAVES CS-134 < 26.8 12-Jun-19 HORSERADISH LEAVES CS-137 < 20.5 15-Jul-19 HORSERADISH LEAVES BE-7 1,668.9 +/- 405.0 15-Jul-19 HORSERADISH LEAVES BE-7 1,239.5 +/- 332.3 Duplicate 15-Jul-19 HORSERADISH LEAVES K-40 6,914.6 +/- 699.3 Duplicate 15-Jul-19 HORSERADISH LEAVES K-40 6,742.3 +/- 695.4 15-Jul-19 HORSERADISH LEAVES MN-54 < 27.1 Duplicate 15-Jul-19 HORSERADISH LEAVES MN-54 < 18.5 15-Jul-19 HORSERADISH LEAVES CO-58 < 17.2 15-Jul-19 HORSERADISH LEAVES CO-58 < 26.3 Duplicate 15-Jul-19 HORSERADISH LEAVES FE-59 < 42.9 Duplicate 15-Jul-19 HORSERADISH LEAVES FE-59 < 51.3 15-Jul-19 HORSERADISH LEAVES CO-60 < 15.4 Duplicate 15-Jul-19 HORSERADISH LEAVES CO-60 < 17.7 15-Jul-19 HORSERADISH LEAVES ZN-65 < 43.7 Duplicate 15-Jul-19 HORSERADISH LEAVES ZN-65 < 33.1 15-Jul-19 HORSERADISH LEAVES ZR-NB-95 < 20.7 15-Jul-19 HORSERADISH LEAVES ZR-NB-95 < 32.5 Duplicate 2019 Annual Radiological Environmental Operating Report Page C - 65 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 15-Jul-19 HORSERADISH LEAVES I-131 < 50.9 Duplicate 15-Jul-19 HORSERADISH LEAVES I-131 < 46.2 15-Jul-19 HORSERADISH LEAVES CS-134 < 25.7 Duplicate 15-Jul-19 HORSERADISH LEAVES CS-134 < 24.4 15-Jul-19 HORSERADISH LEAVES CS-137 < 20.1 Duplicate 15-Jul-19 HORSERADISH LEAVES CS-137 < 28.1 19-Aug-19 HORSERADISH LEAVES BE-7 2,903.4 +/- 339.4 19-Aug-19 HORSERADISH LEAVES K-40 6,274.7 +/- 661.9 19-Aug-19 HORSERADISH LEAVES MN-54 < 14.2 19-Aug-19 HORSERADISH LEAVES CO-58 < 14.4 19-Aug-19 HORSERADISH LEAVES FE-59 < 40.4 19-Aug-19 HORSERADISH LEAVES CO-60 < 15.4 19-Aug-19 HORSERADISH LEAVES ZN-65 < 32.7 19-Aug-19 HORSERADISH LEAVES ZR-NB-95 < 12.4 19-Aug-19 HORSERADISH LEAVES I-131 < 20.7 19-Aug-19 HORSERADISH LEAVES CS-134 < 22.4 19-Aug-19 HORSERADISH LEAVES CS-137 < 16.1 23-Sep-19 HORSERADISH LEAVES BE-7 1,499.4 +/- 406.4 23-Sep-19 HORSERADISH LEAVES K-40 7,211.2 +/- 864.7 23-Sep-19 HORSERADISH LEAVES MN-54 < 33.7 23-Sep-19 HORSERADISH LEAVES CO-58 < 37.9 23-Sep-19 HORSERADISH LEAVES FE-59 < 63.1 23-Sep-19 HORSERADISH LEAVES CO-60 < 20.1 23-Sep-19 HORSERADISH LEAVES ZN-65 < 45.9 23-Sep-19 HORSERADISH LEAVES ZR-NB-95 < 25.7 23-Sep-19 HORSERADISH LEAVES I-131 < 36.8 23-Sep-19 HORSERADISH LEAVES CS-134 < 29.5 23-Sep-19 HORSERADISH LEAVES CS-137 < 30.1 28-Oct-19 HORSERADISH LEAVES BE-7 1,834.0 +/- 345.8 28-Oct-19 HORSERADISH LEAVES K-40 7,466.8 +/- 798.1 28-Oct-19 HORSERADISH LEAVES MN-54 < 22.1 28-Oct-19 HORSERADISH LEAVES CO-58 < 29.7 28-Oct-19 HORSERADISH LEAVES FE-59 < 57.7 28-Oct-19 HORSERADISH LEAVES CO-60 < 21.3 28-Oct-19 HORSERADISH LEAVES ZN-65 < 39.7 28-Oct-19 HORSERADISH LEAVES ZR-NB-95 < 24.8 28-Oct-19 HORSERADISH LEAVES I-131 < 30.0 28-Oct-19 HORSERADISH LEAVES CS-134 < 29.6 2019 Annual Radiological Environmental Operating Report Page C - 66 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 28-Oct-19 HORSERADISH LEAVES CS-137 < 22.9 2019 Annual Radiological Environmental Operating Report Page C - 67 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 28-May-19 HORSERADISH LEAVES BE-7 1,939.3 +/- 263.8 28-May-19 HORSERADISH LEAVES K-40 4,731.8 +/- 412.0 28-May-19 HORSERADISH LEAVES MN-54 < 18.8 28-May-19 HORSERADISH LEAVES CO-58 < 14.5 28-May-19 HORSERADISH LEAVES FE-59 < 22.3 28-May-19 HORSERADISH LEAVES CO-60 < 15.1 28-May-19 HORSERADISH LEAVES ZN-65 < 35.2 28-May-19 HORSERADISH LEAVES ZR-NB-95 < 16.9 28-May-19 HORSERADISH LEAVES I-131 < 41.7 28-May-19 HORSERADISH LEAVES CS-134 < 18.6 28-May-19 HORSERADISH LEAVES CS-137 < 18.6 12-Jun-19 HORSERADISH LEAVES BE-7 1,523.8 +/- 335.4 12-Jun-19 HORSERADISH LEAVES K-40 6,451.0 +/- 656.7 12-Jun-19 HORSERADISH LEAVES MN-54 < 28.1 12-Jun-19 HORSERADISH LEAVES CO-58 < 28.6 12-Jun-19 HORSERADISH LEAVES FE-59 < 54.9 12-Jun-19 HORSERADISH LEAVES CO-60 < 19.8 12-Jun-19 HORSERADISH LEAVES ZN-65 < 60.1 12-Jun-19 HORSERADISH LEAVES ZR-NB-95 < 25.6 12-Jun-19 HORSERADISH LEAVES I-131 < 48.7 12-Jun-19 HORSERADISH LEAVES CS-134 < 26.4 12-Jun-19 HORSERADISH LEAVES CS-137 < 29.3 15-Jul-19 HORSERADISH LEAVES BE-7 984.3 +/- 296.5 15-Jul-19 HORSERADISH LEAVES K-40 6,975.9 +/- 670.1 15-Jul-19 HORSERADISH LEAVES MN-54 < 26.2 15-Jul-19 HORSERADISH LEAVES CO-58 < 21.6 15-Jul-19 HORSERADISH LEAVES FE-59 < 45.7 15-Jul-19 HORSERADISH LEAVES CO-60 < 18.9 15-Jul-19 HORSERADISH LEAVES ZN-65 < 37.8 15-Jul-19 HORSERADISH LEAVES ZR-NB-95 < 15.0 15-Jul-19 HORSERADISH LEAVES I-131 < 43.4 15-Jul-19 HORSERADISH LEAVES CS-134 < 22.9 15-Jul-19 HORSERADISH LEAVES CS-137 < 26.5 19-Aug-19 HORSERADISH LEAVES BE-7 2,805.0 +/- 390.8 19-Aug-19 HORSERADISH LEAVES K-40 6,490.3 +/- 797.5 19-Aug-19 HORSERADISH LEAVES MN-54 < 25.8 19-Aug-19 HORSERADISH LEAVES CO-58 < 26.5 19-Aug-19 HORSERADISH LEAVES FE-59 < 45.8 2019 Annual Radiological Environmental Operating Report Page C - 68 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Aug-19 HORSERADISH LEAVES CO-60 < 9.6 19-Aug-19 HORSERADISH LEAVES ZN-65 < 61.5 19-Aug-19 HORSERADISH LEAVES ZR-NB-95 < 27.1 19-Aug-19 HORSERADISH LEAVES I-131 < 35.8 19-Aug-19 HORSERADISH LEAVES CS-134 < 26.4 19-Aug-19 HORSERADISH LEAVES CS-137 < 30.3 23-Sep-19 HORSERADISH LEAVES BE-7 722.3 +/- 209.9 23-Sep-19 HORSERADISH LEAVES K-40 5,411.3 +/- 491.7 23-Sep-19 HORSERADISH LEAVES MN-54 < 14.0 23-Sep-19 HORSERADISH LEAVES CO-58 < 12.2 23-Sep-19 HORSERADISH LEAVES FE-59 < 39.7 23-Sep-19 HORSERADISH LEAVES CO-60 < 19.5 23-Sep-19 HORSERADISH LEAVES ZN-65 < 35.1 23-Sep-19 HORSERADISH LEAVES ZR-NB-95 < 23.1 23-Sep-19 HORSERADISH LEAVES I-131 < 33.5 23-Sep-19 HORSERADISH LEAVES CS-134 < 19.3 23-Sep-19 HORSERADISH LEAVES CS-137 < 20.3 28-Oct-19 HORSERADISH LEAVES BE-7 1,799.3 +/- 393.9 28-Oct-19 HORSERADISH LEAVES K-40 6,267.1 +/- 870.5 28-Oct-19 HORSERADISH LEAVES MN-54 < 36.5 28-Oct-19 HORSERADISH LEAVES CO-58 < 19.0 28-Oct-19 HORSERADISH LEAVES FE-59 < 42.5 28-Oct-19 HORSERADISH LEAVES CO-60 < 19.3 28-Oct-19 HORSERADISH LEAVES ZN-65 < 60.9 28-Oct-19 HORSERADISH LEAVES ZR-NB-95 < 25.3 28-Oct-19 HORSERADISH LEAVES I-131 < 38.6 28-Oct-19 HORSERADISH LEAVES CS-134 < 33.7 28-Oct-19 HORSERADISH LEAVES CS-137 < 44.3 2019 Annual Radiological Environmental Operating Report Page C - 69 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-D1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 28-Oct-19 NON-IRRIGATED SOYBEANS BE-7 < 99.4 28-Oct-19 NON-IRRIGATED SOYBEANS K-40 13,801.0 +/- 579.4 28-Oct-19 NON-IRRIGATED SOYBEANS MN-54 < 14.5 28-Oct-19 NON-IRRIGATED SOYBEANS CO-58 < 12.9 28-Oct-19 NON-IRRIGATED SOYBEANS FE-59 < 37.1 28-Oct-19 NON-IRRIGATED SOYBEANS CO-60 < 11.8 28-Oct-19 NON-IRRIGATED SOYBEANS ZN-65 < 28.1 28-Oct-19 NON-IRRIGATED SOYBEANS ZR-NB-95 < 13.9 28-Oct-19 NON-IRRIGATED SOYBEANS I-131 < 28.5 28-Oct-19 NON-IRRIGATED SOYBEANS CS-134 < 11.9 28-Oct-19 NON-IRRIGATED SOYBEANS CS-137 < 8.1 2019 Annual Radiological Environmental Operating Report Page C - 70 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-D2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 06-Nov-19 IRRIGATED SOYBEANS BE-7 < 97.1 06-Nov-19 IRRIGATED SOYBEANS K-40 16,586.0 +/- 689.4 06-Nov-19 IRRIGATED SOYBEANS MN-54 < 13.1 06-Nov-19 IRRIGATED SOYBEANS CO-58 < 16.7 06-Nov-19 IRRIGATED SOYBEANS FE-59 < 44.9 06-Nov-19 IRRIGATED SOYBEANS CO-60 < 13.5 06-Nov-19 IRRIGATED SOYBEANS ZN-65 < 53.6 06-Nov-19 IRRIGATED SOYBEANS ZR-NB-95 < 13.7 06-Nov-19 IRRIGATED SOYBEANS I-131 < 18.5 06-Nov-19 IRRIGATED SOYBEANS CS-134 < 14.1 06-Nov-19 IRRIGATED SOYBEANS CS-137 < 14.3 2019 Annual Radiological Environmental Operating Report Page C - 71 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-U1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 18-Nov-19 IRRIGATED SOYBEANS BE-7 < 114.9 18-Nov-19 IRRIGATED SOYBEANS K-40 14,592.0 +/- 599.5 18-Nov-19 IRRIGATED SOYBEANS MN-54 < 13.1 18-Nov-19 IRRIGATED SOYBEANS CO-58 < 11.9 18-Nov-19 IRRIGATED SOYBEANS FE-59 < 23.8 18-Nov-19 IRRIGATED SOYBEANS CO-60 < 13.8 18-Nov-19 IRRIGATED SOYBEANS ZN-65 < 25.6 18-Nov-19 IRRIGATED SOYBEANS ZR-NB-95 < 12.8 18-Nov-19 IRRIGATED SOYBEANS I-131 < 14.7 18-Nov-19 IRRIGATED SOYBEANS CS-134 < 10.3 18-Nov-19 IRRIGATED SOYBEANS CS-137 < 11.7 2019 Annual Radiological Environmental Operating Report Page C - 72 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 23-May-19 BOTTOM SEDIMENT K-40 10,612.0 +/- 609.4 23-May-19 BOTTOM SEDIMENT MN-54 < 20.0 23-May-19 BOTTOM SEDIMENT CO-58 < 21.6 23-May-19 BOTTOM SEDIMENT FE-59 < 40.0 23-May-19 BOTTOM SEDIMENT CO-60 < 14.9 23-May-19 BOTTOM SEDIMENT ZN-65 < 35.8 23-May-19 BOTTOM SEDIMENT CS-134 < 20.6 23-May-19 BOTTOM SEDIMENT CS-137 38.9 +/- 21.3 23-May-19 BOTTOM SEDIMENT FE-55 < 26,036.0 22-Oct-19 BOTTOM SEDIMENT K-40 9,276.9 +/- 580.4 22-Oct-19 BOTTOM SEDIMENT MN-54 < 26.4 22-Oct-19 BOTTOM SEDIMENT CO-58 < 30.0 22-Oct-19 BOTTOM SEDIMENT FE-59 < 88.6 22-Oct-19 BOTTOM SEDIMENT CO-60 < 12.4 22-Oct-19 BOTTOM SEDIMENT ZN-65 < 45.1 22-Oct-19 BOTTOM SEDIMENT CS-134 < 17.4 22-Oct-19 BOTTOM SEDIMENT CS-137 < 25.0 22-Oct-19 BOTTOM SEDIMENT FE-55 < 2,785.0 2019 Annual Radiological Environmental Operating Report Page C - 73 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 27-Jun-19 BOTTOM SEDIMENT K-40 11,146.0 +/- 545.4 27-Jun-19 BOTTOM SEDIMENT MN-54 < 18.3 27-Jun-19 BOTTOM SEDIMENT CO-58 < 25.1 27-Jun-19 BOTTOM SEDIMENT FE-59 < 42.0 27-Jun-19 BOTTOM SEDIMENT CO-60 < 14.7 27-Jun-19 BOTTOM SEDIMENT ZN-65 < 51.4 27-Jun-19 BOTTOM SEDIMENT CS-134 < 13.4 27-Jun-19 BOTTOM SEDIMENT CS-137 < 22.8 16-Oct-19 BOTTOM SEDIMENT K-40 12,836.0 +/- 1,033.0 16-Oct-19 BOTTOM SEDIMENT MN-54 < 46.4 16-Oct-19 BOTTOM SEDIMENT CO-58 < 40.2 16-Oct-19 BOTTOM SEDIMENT FE-59 < 140.5 16-Oct-19 BOTTOM SEDIMENT CO-60 < 23.6 16-Oct-19 BOTTOM SEDIMENT ZN-65 < 99.8 16-Oct-19 BOTTOM SEDIMENT CS-134 < 42.7 16-Oct-19 BOTTOM SEDIMENT CS-137 < 40.9 2019 Annual Radiological Environmental Operating Report Page C - 74 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 26-Jul-19 PRIMROSE BE-7 303.5 +/- 109.7 26-Jul-19 PRIMROSE K-40 1,853.8 +/- 230.5 26-Jul-19 PRIMROSE MN-54 < 10.4 26-Jul-19 PRIMROSE CO-58 < 9.0 26-Jul-19 PRIMROSE FE-59 < 16.9 26-Jul-19 PRIMROSE CO-60 < 7.6 26-Jul-19 PRIMROSE ZN-65 < 14.2 26-Jul-19 PRIMROSE ZR-NB-95 < 9.4 26-Jul-19 PRIMROSE I-131 < 14.4 26-Jul-19 PRIMROSE CS-134 < 8.2 26-Jul-19 PRIMROSE CS-137 < 10.6 2019 Annual Radiological Environmental Operating Report Page C - 75 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 26-Jul-19 AMERICAN PONDWEED BE-7 196.2 +/- 69.0 26-Jul-19 AMERICAN PONDWEED K-40 2,110.8 +/- 185.4 26-Jul-19 AMERICAN PONDWEED MN-54 < 8.0 26-Jul-19 AMERICAN PONDWEED CO-58 < 6.7 26-Jul-19 AMERICAN PONDWEED FE-59 < 13.9 26-Jul-19 AMERICAN PONDWEED CO-60 < 4.9 26-Jul-19 AMERICAN PONDWEED ZN-65 < 16.4 26-Jul-19 AMERICAN PONDWEED ZR-NB-95 < 12.7 26-Jul-19 AMERICAN PONDWEED I-131 < 15.6 26-Jul-19 AMERICAN PONDWEED CS-134 < 6.6 26-Jul-19 AMERICAN PONDWEED CS-137 < 7.6 2019 Annual Radiological Environmental Operating Report Page C - 76 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: SC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 09-Aug-19 CATTAILS BE-7 1,279.5 +/- 206.4 Duplicate 09-Aug-19 CATTAILS BE-7 1,221.5 +/- 192.9 09-Aug-19 CATTAILS K-40 3,124.8 +/- 357.2 09-Aug-19 CATTAILS K-40 3,139.8 +/- 354.6 Duplicate 09-Aug-19 CATTAILS MN-54 < 10.3 Duplicate 09-Aug-19 CATTAILS MN-54 < 14.0 09-Aug-19 CATTAILS CO-58 < 5.2 09-Aug-19 CATTAILS CO-58 < 6.5 Duplicate 09-Aug-19 CATTAILS FE-59 < 15.6 Duplicate 09-Aug-19 CATTAILS FE-59 < 19.6 09-Aug-19 CATTAILS CO-60 < 13.6 09-Aug-19 CATTAILS CO-60 < 13.9 Duplicate 09-Aug-19 CATTAILS ZN-65 < 25.0 09-Aug-19 CATTAILS ZN-65 < 29.0 Duplicate 09-Aug-19 CATTAILS ZR-NB-95 < 14.3 09-Aug-19 CATTAILS ZR-NB-95 < 10.5 Duplicate 09-Aug-19 CATTAILS I-131 < 14.9 09-Aug-19 CATTAILS I-131 < 24.5 Duplicate 09-Aug-19 CATTAILS CS-134 < 13.1 Duplicate 09-Aug-19 CATTAILS CS-134 < 15.7 09-Aug-19 CATTAILS CS-137 < 10.9 Duplicate 09-Aug-19 CATTAILS CS-137 < 16.4 2019 Annual Radiological Environmental Operating Report Page C - 77 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Soil Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 25-Jun-19 SOIL K-40 10,567.0 +/- 530.5 25-Jun-19 SOIL MN-54 < 23.0 25-Jun-19 SOIL CO-58 < 19.3 25-Jun-19 SOIL FE-59 < 69.8 25-Jun-19 SOIL CO-60 < 13.0 25-Jun-19 SOIL ZN-65 < 35.8 25-Jun-19 SOIL CS-134 < 16.5 25-Jun-19 SOIL CS-137 138.2 +/- 28.5 2019 Annual Radiological Environmental Operating Report Page C - 78 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Soil Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 23-May-19 SOIL K-40 11,791.0 +/- 592.9 23-May-19 SOIL MN-54 < 28.4 23-May-19 SOIL CO-58 < 33.8 23-May-19 SOIL FE-59 < 89.4 23-May-19 SOIL CO-60 < 25.1 23-May-19 SOIL ZN-65 < 59.9 23-May-19 SOIL CS-134 < 16.9 23-May-19 SOIL CS-137 94.5 +/- 26.7 2019 Annual Radiological Environmental Operating Report Page C - 79 Wolf Creek Generating Station

Exposure Pathway - Ingestion Meat Location: J3.5 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 04-Jan-19 DEER K-40 2,771.2 +/- 436.8 04-Jan-19 DEER MN-54 < 20.9 04-Jan-19 DEER CO-58 < 14.6 04-Jan-19 DEER FE-59 < 29.3 04-Jan-19 DEER CO-60 < 10.5 04-Jan-19 DEER ZN-65 < 22.7 04-Jan-19 DEER CS-134 < 15.3 04-Jan-19 DEER CS-137 < 19.4 04-Jan-19 DEER H-3 786.0 +/- 106.0 2019 Annual Radiological Environmental Operating Report Page C - 80 Wolf Creek Generating Station

Exposure Pathway - Ingestion Meat Location: J4.0 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 20-Apr-19 WILD TURKEY K-40 2,860.9 +/- 442.7 20-Apr-19 WILD TURKEY MN-54 < 12.4 20-Apr-19 WILD TURKEY CO-58 < 12.9 20-Apr-19 WILD TURKEY FE-59 < 21.9 20-Apr-19 WILD TURKEY CO-60 < 18.0 20-Apr-19 WILD TURKEY ZN-65 < 43.5 20-Apr-19 WILD TURKEY CS-134 < 16.7 20-Apr-19 WILD TURKEY CS-137 < 14.1 20-Apr-19 WILD TURKEY H-3 < 94.0 2019 Annual Radiological Environmental Operating Report Page C - 81 Wolf Creek Generating Station

APPENDIX D LAND USE CENSUS REPORT 2019 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

WOLF CREEK GENERATING STATION 2019 LAND USE CENSUS REPORT REVISION 1 Prepared by:

01/15/20 Jon Matthew Vopat Date Peer Review:

01/16/20 Craig Adkinson Date Approved by:

01/21/2020 Daniel Michel Date

EXECUTIVE

SUMMARY

The annual Land Use Census of rural residents within five miles of the Wolf Creek Generating Station (WCGS) has been completed in 2019 in accordance with AP 07B-004, [Offsite Dose Calculation Manual (Radiological Environmental Monitoring Program)].

No program changes are necessary regarding milk locations. Again, no milk sampling locations were identified.

The two broadleaf vegetation locations with the highest calculated annual average D/Q rankings are A2.60-17TE1527 and Q2.35-MILA1619. Since these gardens are currently listed as sample locations for the Radiological Environmental Monitoring Program in procedure AP 07B-004 (locations A-3 and Q-6), no program changes are necessary regarding broadleaf vegetation locations.

BACKGROUND Section 5.2, Attachment A, of procedure AP 07B-004, directs that "a Land Use Census shall be conducted annually during the growing season to identify the nearest (1) milk animal, (2) residence, and (3) garden of greater than 500 square feet producing broadleaf vegetation in each of the 16 meteorological sections within five miles of the WCGS site."

Table 5-1, Attachment A, of procedure AP 07B-004, requires that broadleaf vegetation samples be collected from two indicator locations (using the criteria from the Land Use Census section) with highest calculated annual average D/Q.

Table 5-1, Attachment A, of procedure AP 07B-004, also requires that milk samples be collected from three indicator locations within 5 miles of the site having the highest dose potential.

METHODOLOGY Over two hundred surveys were mailed to the rural residents living within five miles of WCGS.

The survey excluded the residents of New Strawn and Burlington. These locations were excluded due to the large number of households and the low likelihood that information gained from these residences would affect the locations chosen for REMP sampling. Drive-by information was collected for the nearest residences in each sector that did not return surveys.

The information collected was compiled and the results are identified in Tables 1-3. Calculations were performed so that garden locations could be ranked by their respective D/Q. These results are contained in Table 4.

2019 Land Use Census Report, Revision 1 1

RESULTS No changes were identified for the nearest occupied residence in each sector. Seven changes were noted for the nearest garden producing broadleaf vegetation. These changes are identified as an underlined entry in the Tables. There were no changes regarding milk sample locations.

Again, no locations were identified that milked animals for human consumption.

2019 Land Use Census Report, Revision 1 2

TABLE 1 2019 LAND USE CENSUS DATA LOCATION OF NEAREST:

SECTOR RESIDENCE MILKING ANIMALS BROADLEAF GARDEN A A2.60-17TE1527 None A2.60-17TE1527 B B3.53-QURD1755 None None C C1.92-16RD1655 None C3.16-QURD1712 D D2.33-RERD1520 None D2.33-RERD1520 E E1.78-QULA1451 None E4.92-15RD2065 F F1.76-14RD1730 None F2.44-RERD1391 G G3.03-13RD1820 None None H H3.09-12RD1711 None H3.80-11RD1674 J J3.70-11RD1540 None J3.70-11RD1540 K K2.70-12LA1437 None None L L2.10-NARD1339 None L2.39-NARD1309 M M2.34-14RD1346 None M3.87-13RD1227 N N2.08-15RD1350 None N2.08-15RD1350 P P2.76-HW751534 None P3.52-16RD1196 Q Q2.35-MILA1619 None Q2.35-MILA1619 R R2.08-NALN1650 None None NOTE: Entries underlined indicate changes from the 2018 Land Use Census.

EXAMPLE: A2.60-17TE1527 "A" = Sector A "2.60" = 2.60 miles from the reactor "17TE1527" = address 2019 Land Use Census Report, Revision 1 3

TABLE 2 SECTOR 2018 NEAREST 2019 NEAREST RESIDENCE RESIDENCE A A2.60-17TE1527 A2.60-17TE1527 B B3.53-QURD1755 B3.53-QURD1755 C C1.92-16RD1655 C1.92-16RD1655 D D2.33-RERD1520 D2.33-RERD1520 E E1.78-QULA1451 E1.78-QULA1451 F F1.76-14RD1730 F1.76-14RD1730 G G3.03-13RD1820 G3.03-13RD1820 H H3.09-12RD1711 H3.09-12RD1711 J J3.70-11RD1540 J3.70-11RD1540 K K2.70-12LA1437 K2.70-12LA1437 L L2.10-NARD1339 L2.10-NARD1339 M M2.34-14RD1346 M2.34-14RD1346 N N2.08-15RD1350 N2.08-15RD1350 P P2.76-HW751534 P2.76-HW751534 Q Q2.35-MILA1619 Q2.35-MILA1619 R R2.08-NALN1650 R2.08-NALN1650 NOTE: Entries underlined indicate changes from the 2018 Land Use Census.

2019 Land Use Census Report, Revision 1 4

TABLE 3 2019 LAND USE CENSUS MILK AND GARDEN DATA SECTOR 2018 2019 2018 NEAREST 2019 NEAREST MILKING MILKING BROADLEAF BROADLEAF ANIMALS ANIMALS GARDEN GARDEN A None None A2.60-17TE1527 A2.60-17TE1527 B None None None None C None None C3.58-RERD1675 C3.16-QURD1712 D None None D3.00-16RD1829 D2.33-RERD1520 E None None None E4.92-15RD2065 F None None F3.37-14RD1904 F2.44-RERD1391 G None None None None H None None None H3.80-11RD1674 J None None J3.70-11RD1540 J3.70-11RD1540 K None None K4.10-NARD1120 None L None None L2.39-NARD1309 L2.39-NARD1309 M None None M3.78-LYRD1390 M3.87-13RD1227 N None None N2.08-15RD1350 N2.08-15RD1350 P None None P2.94-16RD1309 P3.52-16RD1196 Q None None Q2.35-MILA1619 Q2.35-MILA1619 R None None None None NOTE: Underlined entries indicate changes from the 2018 Land Use Census.

2019 Land Use Census Report, Revision 1 5

TABLE 4 INFORMATION USED FOR D/Q CALCULATIONS ON GARDENS PRODUCING BROADLEAF VEGETATION FROM LAND USE FROM SA-19-002 DIST CALC NEAR NEAR FAR FAR SECTOR SECTOR (MI) (METERS) DIST D/Q DIST D/Q CALC RANKING A 2.60 4184 4000 1.94E-09 5000 1.32E-09 1.83E-09 1 B

C 3.16 5086 5000 2.51E-10 6000 1.85E-10 2.45E-10 11 D 2.33 3750 3000 4.88E-10 4000 2.93E-10 3.42E-10 8 E 4.92 7918 7000 1.28E-10 8000 1.03E-10 1.05E-10 12 F 2.44 3927 3000 6.58E-10 4000 3.95E-10 4.14E-10 7 G

H 3.80 6116 6000 4.71E-10 7000 3.50E-10 4.57E-10 5 J 3.70 5955 5000 4.59E-10 6000 3.37E-10 3.42E-10 8 K

L 2.39 3846 3000 1.02E-09 4000 6.11E-10 6.74E-10 4 M 3.87 6228 6000 2.99E-10 7000 2.22E-10 2.81E-10 10 N 2.08 3347 3000 1.10E-09 4000 6.62E-10 9.48E-10 3 P 3.52 5665 5000 5.11E-10 6000 3.76E-10 4.21E-10 6 Q 2.35 3782 3000 1.53E-09 4000 9.17E-10 1.05E-09 2 R

Originated by: Date: 01/15/20 Verified by: Date:

01/16/20 2019 Land Use Census Report, Revision 1 6