ML23114A381

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(WCGS) - 2022 Annual Radiological Environmental Operating Report
ML23114A381
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 04/24/2023
From: Hamman D
Wolf Creek
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
RA 23-0029
Download: ML23114A381 (1)


Text

Dustin T. Hamman Director Nuclear and Regulatory Affairs April 24, 2023 RA 23-0029 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Docket No. 50-482: 2022 Annual Radiological Environmental Operating Report Commissioners and Staff:

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, 2022, through December 31, 2022.

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

Sincerely, Dustin T. Hamman DTH/jkt

Enclosure:

Wolf Creek Generating Station 2022 Annual Radiological Environmental Operating Report cc: S. S. Lee (NRC), w/e R. J. Lewis (NRC), w/e G. E. Werner (NRC), w/e Senior Resident Inspector (NRC), w/e P.O. Box 411 l Burlington, KS 66839 l 620-364-8831

Enclosure to RA 23-0029 Wolf Creek Generating Station 2022 Annual Radiological Environmental Operating Report (This enclosure contains 158 pages)

WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION 2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT March 15, 2023

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 VII. Condition Reports 11 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-51 Shoreline Sediment C-53 Fish C-56 Food/Garden C-63 Food/Crops C-73 Aquatic Vegetation C-76 Bottom Sediment C-79 Terrestrial Vegetation C-84 Soil C-86 Meat C-88 i

Appendix D - Land Use Census Report ii

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 iii

EXECUTIVE

SUMMARY

Plant-related activation, corrosion, or fission products were not detected during 2022 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 2022 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 2022 Annual Radiological Environmental Operating Report for Wolf Creek Generating Station (WCGS) covers the period from January 1 through December 31, 2022. WCGS is 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 2022 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 44 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 samples 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).

Three other bottom sediment samples were collected from Makeup Discharge Structure (MUDS), Environmental Education Area (EEA), and Stringtown Cemetery. 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 R2.6. 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 G1.7. Gamma isotopic analysis and tritium analysis was performed on the deer 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 2022 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 2022 weekly gross beta analyses range for indicator locations was 0.013 to 0.063 pCi/m3.

The 2022 weekly gross beta analyses range was within the 1983 and 1984 pre-operational range. Additionally, the annual mean for indicator locations for 2022 (0.029 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 2022 (0.029 pCi/m3) was the same as the controlled location (0.029 pCi/m3). The indicators location with the highest gross beta annual mean were 32,37, and 49 annual mean of these locations was (0.030 pCi/m3). One point higher than the controlled location (0.029 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 2022, the range for Be-7 detected activity was 0.059 to 0.120 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 (0.089 pCi/m3) was lower 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 37 (0.098 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 2022 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 2022 was 18.7 mR per standardized 90-day quarter. The annual mean of the control sample locations in 2022 was 18.7 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 22 (21.7 mR per standardized 90-day quarter) which is slightly higher than the annual mean of the control sample locations (18.7 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 2021 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 14,495 pCi/L and the range was 12,956 to 16,488 pCi/L.

The detected tritium activity was below the 30,000 pCi/L AP 07B-004 reporting level. Chart 5 illustrates the yearly average of surface water tritium data for the SP location. Chart 5 indicates the average tritium concentration of the SP location has increased slightly from last year. Tritium activity was detected in the month of November from John Redmond Reservoir (JRR) control sample location 165 pCi/L.

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 2022 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 2022 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 (2.818 pCi/L) was lower when compared to the annual mean of the control sample location gross beta activity (2.899 pCi/L). The 2022 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.

Tritium was detected in the indicator sample location during the third and fourth quarter 2022 annual mean of 876 pCi/L. 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 2021 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), JRR (control sample location), and EEA (Environmental Education Area. K-40 was also detected during pre-operational shoreline sediment monitoring.

No other radionuclides were detected in the DC, EEA, or JRR shoreline sediment samples during 2022. The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2022 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 2022 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 (8,214 pCi/kg). The detected tritium activity was attributable to plant operation. An adult consuming 21 kilograms of fish, at the maximum measured tritium concentration (20,213 pCi/kg), would receive a committed effective dose equivalent of 0.092 mRem.

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

No other radionuclides were detected in fish samples during 2022. 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 2022 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 2022 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 pre-operational samples. The Cs-137 activity detected in 2022 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 30 to 363 pCi/kg.

The detected Cs-137 activity in the sample 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 2022 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 2022 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 2022 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 three sample we took in 2022. The detectable annual mean of the three was (172 pCi/kg). With the min being 122, and max of 212. 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 106 to 904 pCi/kg. The detected Cs-137 activity in soil sampled in 2022 is below and within the decay corrected pre-operational range.

Plant-related activation, corrosion, or fission products were not detected during 2022 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.

Tritium activity (149.0 pCi/kg) was detected in the turkey sample. The detected tritium activity was attributable to plant operation.

An adult consuming 72.6 kilograms of turkey meat, at the measured tritium concentration 149.0 pCi/kg), would receive a committed effective dose equivalent of 0.001 mRem.

No other radionuclides were detected in the turkey sample. No unusual trends identified (6) Deer (Ingestion Pathway)

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

Tritium activity (4,512 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 (4,512 pCi/kg), would receive a committed effective dose equivalent of 0.021 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 2022.

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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.

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 0.255 mRem for 2022.

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 (14,495 pCi/L), would receive a committed effective dose equivalent of 0.662 mRem per year. For an adult eating 21 kg of fish per year from Coffey County Lake, using the average tritium activity (8,214 pCi/kg), would receive a committed effective dose equivalent of 0.011 mRem per year. Based upon the REMP results, the dose from both pathways was calculated to be 0.673 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.

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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 snapshot 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.

VII. Condition reports on REMP for 2022 REMP Turkey sample (CR# 10051006)

REMP Air Sample Location #49 (CR# 10015749)

Tritium detected in a REMP sample from Iola (CR# 10020845) 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 11 of 32

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) 2022 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, 55,

& 54 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 2022 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.

2022 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).

2022 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 2022 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 54 0.18 S K 55 0.25 SSW L 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 2022 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) R2.6 2.6 NNE R Meat (Deer) G1.7 1.7 SE G 2022 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 20.6 18.8 20.4 20.0 79.8 2 18.0 19.2 19.0 19.7 75.9 4 17.4 18.8 19.4 20.3 75.9 5 17.7 15.2 18.7 18.7 70.3 7 17.0 17.9 18.4 18.7 72.0 8 18.3 17.9 20.7 20.3 77.2 9 15.4 17.2 18.4 15.1 66.1 11 18.7 17.5 21.7 23.3 81.2 12 20.0 19.8 20.4 20.7 80.9 13 20.9 20.8 19.7 21.3 82.7 14 18.7 19.5 19.7 20.0 77.9 15 20.0 18.5 20.0 20.7 79.2 16 16.7 17.9 18.7 20.0 73.3 17 18.0 16.9 17.7 20.7 73.3 18 15.4 17.9 19.0 19.7 72.0 19 19.6 19.2 20.0 21.0 79.8 20 17.4 17.5 20.0 19.0 73.9 22 22.2 20.2 22.7 21.7 86.8 23 17.4 19.5 19.7 18.1 74.7 24 20.6 20.5 19.0 19.4 79.5 25 15.8 15.6 16.4 17.4 65.2 26 16.1 16.2 17.0 19.1 68.4 27 18.3 17.9 21.4 18.7 76.3 29 15.8 14.9 16.0 18.1 64.8 30 17.4 17.9 21.4 22.0 78.7 32 18.0 16.5 20.0 19.0 73.5 34 18.0 20.5 22.0 19.0 79.5 35 20.0 19.2 20.7 18.1 78.0 36 18.0 17.9 20.7 21.0 77.6 37 17.4 14.9 18.4 17.1 67.8 38 20.0 18.8 21.4 21.3 81.5 39 18.3 17.2 16.0 17.7 69.2 41 20.3 18.2 20.7 20.3 79.5 42 12.2 13.2 12.4 13.2 51.0 43 12.9 12.3 12.0 13.8 51.0 44 19.6 22.1 20.4 19.4 81.5 46 17.7 16.9 17.4 18.7 70.7 49 17.7 15.2 17.4 20.0 70.3 50 19.0 18.9 22.0 17.7 77.6 51 18.3 17.5 19.4 18.1 73.3 52 20.3 18.5 22.4 21.7 82.9 53 19.9 20.1 20.1 20.0 80.1 54 20.3 21.5 19.4 19.1 80.3 55 19 20.8 18.7 19.7 78.2 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 20 of 32

FIGURE 1 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 21 of 32

FIGURE 2 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 22 of 32

FIGURE 3 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 23 of 32

FIGURE 4 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 24 of 32

FIGURE 5 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 25 of 32

CHART 1 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 26 of 32

CHART 2 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 27 of 32

CHART 3 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 28 of 32

CHART 4 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 29 of 32

CHART 5 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 30 of 32

CHART 6 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 31 of 32

CHART 7 2022 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, 2022 through December, 2022

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.

Table A-2 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-3 lists results of the analyses on intralaboratory spiked samples for the past twelve months. All samples are prepared using NIST traceable sources. Data for previous years available upon request.

Table A-4 lists results of the analyses on intralaboratory blank samples for the past twelve months. Data for previous years available upon request.

Table A-5 lists analytical results from the intralaboratory duplicate program for the past twelve months. Acceptance is based on each result being within 25% of the mean of the two results or the two sigma uncertainties of each result overlap.

The results in Table A-6 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

Results in Table A-7 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 INTRALABORATORY 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 RAD-128 Study ERDW-95 1/10/2022 Ba-133 67.4 +/- 4.3 63.0 52.4 - 69.4 Pass ERDW-95 1/10/2022 Cs-134 82.6 +/- 4.1 84.9 69.6 - 93.4 Pass ERDW-95 1/10/2022 Cs-137 35.4 +/- 4.6 29.3 25.2 - 35.3 Fail b ERDW-95 1/10/2022 Co-60 104 +/-4 102 91.8 - 114 Pass ERDW-95 1/10/2022 Zn-65 356 +/- 13 312 281 - 384 Pass ERDW-97 1/10/2022 Gr. Alpha 30.9 +/- 2.2 32.5 16.6 - 42.1 Pass ERDW-97 1/10/2022 Gr. Beta 62.9 +/- 2.3 68.3 47.4 - 75.1 Pass ERDW-99 1/10/2022 Ra-226 8.40 +/- 0.72 9.53 7.14 - 11.1 Pass ERDW-99 1/10/2022 Ra-228 7.25 +/- 2.32 8.71 5.59 - 11.0 Pass ERDW-99 1/10/2022 Uranium 70.9 +/- 2.3 69.0 56.4 - 75.9 Pass ERDW-95 1/10/2022 H-3 23,600 +/- 700 22,200 19,500 - 24,400 Pass RAD-130 Study ERDW-2087 8/25/2022 Ba-133 37.2 +/- 3.9 38.2 30.9 - 42.8 Pass ERDW-2087 8/25/2022 Cs-134 81.8 +/- 3.9 88.6 72.7 - 97.5 Pass ERDW-2087 8/25/2022 Cs-137 174 +/-6 170 153 - 189 Pass ERDW-2087 8/25/2022 Co-60 76.9 +/- 4.0 72.4 65.2 - 82.1 Pass ERDW-2087 8/25/2022 Zn-65 349 +/-3 326 293 - 380 Pass ERDW-2087 8/25/2022 Gr. Alpha 52.8 +/- 2.4 60.2 31.5 - 74.8 Pass ERDW-2087 8/25/2022 Gr. Beta 18.7 +/- 1.0 17.7 10.1 - 25.9 Pass ERDW-2091 8/25/2022 Ra-226 9.23 +/- 0.57 13.1 9.77 - 15.1 Fail c ERDW-2091 8/25/2022 Ra-228 8.72 +/- 1.49 8.40 5.38 - 10.6 Pass ERDW-2095 8/25/2022 H-3 23,900 +/- 481 22,100 19,400 - 24,300 Pass ERDW-2089 8/25/2022 I-131 30.8 +/- 1.0 27.1 23.0 - 32.5 Pass 090622D Study ERDW-2091 9/6/2022 Ra-226 21.5 +/- 1.1 19.3 14.3 - 22.0 Pass c 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 The cesium-137 result did not meet ERA acceptance criteria. It is believed that detector drift could have contributed to the original Cs-137 result landing outside the upper acceptance limit.

c The radium-226 result did not meet ERA acceptance criteria. An ERA Quick Response PT sample was ordered. The results were within the acceptance criteria. The reason for the earlier failing result is not known.

A-3

TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaSO4: Dy Cards).a mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 1 2022-23-1 2/7/2023 Spike 1 134.0 134.5 0.00 2022-23-1 2/7/2023 Spike 2 134.0 131.1 -0.02 2022-23-1 2/7/2023 Spike 3 134.0 134.0 0.00 2022-23-1 2/7/2023 Spike 4 134.0 130.7 -0.02 2022-23-1 2/7/2023 Spike 5 134.0 131.5 -0.02 2022-23-1 2/7/2023 Spike 6 134.0 139.3 0.04 2022-23-1 2/7/2023 Spike 7 134.0 134.8 0.01 2022-23-1 2/7/2023 Spike 8 134.0 130.7 -0.02 2022-23-1 2/7/2023 Spike 9 134.0 133.1 -0.01 2022-23-1 2/7/2023 Spike 10 134.0 129.9 -0.03 2022-23-1 2/7/2023 Spike 11 134.0 125.6 -0.06 2022-23-1 2/7/2023 Spike 12 134.0 139.5 0.04 2022-23-1 2/7/2023 Spike 13 134.0 135.2 0.01 2022-23-1 2/7/2023 Spike 14 134.0 135.8 0.01 2022-23-1 2/7/2023 Spike 15 134.0 133.6 0.00 2022-23-1 2/7/2023 Spike 16 134.0 132.7 -0.01 2022-23-1 2/7/2023 Spike 17 134.0 125.1 -0.07 2022-23-1 2/7/2023 Spike 18 134.0 131.9 -0.02 2022-23-1 2/7/2023 Spike 19 134.0 125.3 -0.06 2022-23-1 2/7/2023 Spike 20 134.0 128.2 -0.04 Mean (Spike 1-20) 132.1 -0.01 Passd Standard Deviation (Spike 1-20) 4.1 0.03 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 - conventionally true value) ÷ conventionally true value) where the conventionally 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-4

TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaSO4: Dy Cards).a mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 2 2022-23-2 2/7/2023 Spike 21 70.0 71.7 0.02 2022-23-2 2/7/2023 Spike 22 70.0 72.1 0.03 2022-23-2 2/7/2023 Spike 23 70.0 66.2 -0.05 2022-23-2 2/7/2023 Spike 24 70.0 70.6 0.01 2022-23-2 2/7/2023 Spike 25 70.0 71.0 0.01 2022-23-2 2/7/2023 Spike 26 70.0 71.3 0.02 2022-23-2 2/7/2023 Spike 27 70.0 68.4 -0.02 2022-23-2 2/7/2023 Spike 28 70.0 70.2 0.00 2022-23-2 2/7/2023 Spike 29 70.0 72.1 0.03 2022-23-2 2/7/2023 Spike 30 70.0 71.2 0.02 2022-23-2 2/7/2023 Spike 31 70.0 67.5 -0.04 2022-23-2 2/7/2023 Spike 32 70.0 68.8 -0.02 2022-23-2 2/7/2023 Spike 33 70.0 72.2 0.03 2022-23-2 2/7/2023 Spike 34 70.0 69.6 -0.01 2022-23-2 2/7/2023 Spike 35 70.0 69.7 0.00 2022-23-2 2/7/2023 Spike 36 70.0 68.0 -0.03 2022-23-2 2/7/2023 Spike 37 70.0 72.2 0.03 2022-23-2 2/7/2023 Spike 38 70.0 70.6 0.01 2022-23-2 2/7/2023 Spike 39 70.0 70.4 0.01 2022-23-2 2/7/2023 Spike 40 70.0 66.5 -0.05 Mean (Spike 21-40) 70.0 0.00 Passd Standard Deviation (Spike 21-40) 1.9 0.03 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 - conventionally true value) ÷ conventionally true value) where the conventionally 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. Intralaboratory "Spiked" Samples Concentrationa b

Lab Code Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPDW-30305 1/5/2022 Gr. Alpha 3.9 +/- 0.8 6.3 3.1 - 9.4 Pass 0.62 SPDW-30305 1/5/2022 Gr. Beta 65.5 +/- 1.6 75.9 60.7 - 91.1 Pass 0.86 SPDW-40000 1/7/2022 H-3 2,220 +/- 162 2,110 1,688 - 2,532 Pass 1.05 SPDW-40013 1/6/2022 Ra-226 12.7 +/- 0.3 12.3 8.6 - 16.0 Pass 1.03 SPDW-40014 7/12/2021 H-3 11,681 +/- 345 10,400 8,320 - 12,480 Pass 1.12 SPDW-40015 7/12/2021 H-3 11,318 +/- 340 10,400 8,320 - 12,480 Pass 1.09 SPDW-40022 2/3/2022 Ra-228 14.5 +/- 3.9 15.3 10.7 - 19.9 Pass 0.95 SPDW-40024 2/4/2022 H-3 10,502 +/- 321 10,400 8,320 - 12,480 Pass 1.01 SPDW-40025 1/11/2021 H-3 2,278 +/- 176 2,110 1,688 - 2,532 Pass 1.08 SPDW-40026 1/11/2021 H-3 2,291 +/- 176 2,110 1,688 - 2,532 Pass 1.09 SPDW-40028 2/11/2022 H-3 10,594 +/- 322 10,400 8,320 - 12,480 Pass 1.02 SPDW-40037 2/25/2022 H-3 10,724 +/- 322 10,400 8,320 - 12,480 Pass 1.03 SPDW-40045 3/3/2022 Sr-90 19.2 +/- 1.1 17.1 13.7 - 20.5 Pass 1.12 SPDW-40052 3/10/2022 H-3 10,851 +/- 328 10,400 8,320 - 12,480 Pass 1.04 SPDW-40064 3/18/2022 H-3 10,795 +/- 332 10,400 8,320 - 12,480 Pass 1.04 SPDW-40073 3/22/2022 Ra-228 15.1 +/- 2.4 13.4 9.4 - 17.4 Pass 1.13 SPDW-40075 1/28/2022 Ra-226 12.2 +/- 0.3 12.3 8.6 - 16.0 Pass 0.99 SPDW-40078 3/14/2022 U-234 28.0 +/- 2.0 23.0 16.1 - 29.9 Pass 1.22 SPDW-40078 3/14/2022 U-238 29.9 +/- 2.1 23.2 16.2 - 30.2 Pass 1.29 SPW-598 3/24/2022 Fe-55 10,505 +/- 1,100 10,006 8,005 - 12,007 Pass 1.05 SPDW-40087 3/24/2022 Ra-226 14.4 +/- 0.4 12.3 8.6 - 16.0 Pass 1.17 LCS-W-032222 1/10/2022 Ba-133 65.4 +/- 6.5 63.0 50 - 76 Pass 1.04 LCS-W-032222 1/10/2022 Cs-134 87.7 +/- 6.0 84.9 68 - 102 Pass 1.03 LCS-W-032222 1/10/2022 Cs-137 34.2 +/- 6.6 29.3 23 - 35 Pass 1.17 LCS-W-032222 1/10/2022 Co-60 106 +/-6 102 82 - 122 Pass 1.04 LCS-W-032222 1/10/2022 Zn-65 341 +/- 18 312 250 - 374 Pass 1.09 SPDW-40083 4/1/2022 H-3 10,785 +/- 329 10,400 8,320 - 12,480 Pass 1.04 LCS-W-040622 1/10/2022 Ba-133 60.4 +/- 7.6 63.0 50.4 - 75.6 Pass 0.96 LCS-W-040622 1/10/2022 Cs-134 91.4 +/- 6.8 84.9 67.9 - 102 Pass 1.08 LCS-W-040622 1/10/2022 Cs-137 31.7 +/- 8.5 29.3 23.4 - 35.2 Pass 1.08 LCS-W-040622 1/10/2022 Co-60 111 +/-7 102 81.6 - 122 Pass 1.08 LCS-W-040622 1/10/2022 Zn-65 330 +/- 28 312 250 - 374 Pass 1.06 LCS-SO-040822 8/1/2020 Cs-134 17,126 +/- 176 19,189 15,351 - 23,027 Pass 0.89 LCS-SO-040822 8/1/2020 Co-57 29,070 +/- 356 29,730 23,784 - 35,676 Pass 0.98 LCS-SO-040822 8/1/2020 Co-60 27,057 +/- 166 27,027 21,622 - 32,432 Pass 1.00 LCS-SO-040822 8/1/2020 Mn-54 17,886 +/- 455 16,486 13,189 - 19,783 Pass 1.08 LCS-SO-040822 8/1/2020 K-40 18,799 +/- 685 16,810 13,448 - 20,172 Pass 1.12 LCS-SO-040822 8/1/2020 Zn-65 14,460 +/- 754 12,703 10,162 - 15,244 Pass 1.14 SPDW-40085 4/4/2022 Sr-90 17.3 +/- 1.1 17.1 13.7 - 20.5 Pass 1.01 SPDW-40089 4/8/2022 H-3 10,677 +/- 326 10,400 8,320 - 12,480 Pass 1.03 SPDW-40130 4/8/2022 Ra-226 11.4 +/- 0.3 12.3 8.6 - 16.0 Pass 0.93 SPDW-40098 4/11/2022 Gr. Alpha 6.7 +/- 1.1 6.3 3.1 - 9.4 Pass 1.07 SPDW-40098 4/11/2022 Gr. Beta 71.7 +/- 1.7 75.9 60.7 - 91.1 Pass 0.94 SPDW-40102 4/14/2022 H-3 10,369 +/- 323 10,400 8,320 - 12,480 Pass 1.00 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 Acceptance criteria are listed in Attachment A of this report.

A-6

TABLE A-3. Intralaboratory "Spiked" Samples Concentrationa Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPDW-40132 5/3/2022 H-3 10,834 +/- 329 10,400 8,320 - 12,480 Pass 1.04 SPDW-40142 5/5/2022 Ra-226 11.6 +/- 0.4 12.3 8.6 - 16.0 Pass 0.94 SPDW-40139 5/18/2022 H-3 10,465 +/- 322 10,400 8,320 - 12,480 Pass 1.01 SPDW-40147 5/9/2022 Gr. Alpha 22.1 +/- 1.2 32.5 16.3 - 48.8 Pass 0.68 SPDW-40132 5/3/2022 H-3 10,834 +/- 329 10,400 8,320 - 12,480 Pass 1.04 SPDW-40142 5/5/2022 Ra-226 11.6 +/- 0.4 12.3 8.6 - 16.0 Pass 0.94 SPDW-40139 5/18/2022 H-3 10,465 +/- 322 10,400 8,320 - 12,480 Pass 1.01 SPDW-40147 5/9/2022 Gr. Alpha 22.1 +/- 1.2 32.5 16.3 - 48.8 Pass 0.68 SPDW-40147 5/9/2022 Gr. Beta 63.1 +/- 1.6 62.9 50.3 - 75.5 Pass 1.00 SPDW-40157 5/25/2022 Ra-226 10.1 +/- 0.3 12.3 8.6 - 16.0 Pass 0.82 SPW-1856 6/14/2022 Sr-90 17.4 +/- 2.9 17.1 13.7 - 20.5 Pass 1.02 LCS-AP-061522 3/21/2022 Cs-134 479 +/- 10 549 439 - 0,659 Pass 0.87 LCS-AP-061522 3/21/2022 Cs-137 1,418 +/- 117 1,320 1,056 - 1,584 Pass 1.07 LCS-AP-061522 3/21/2022 Co-60 891 +/-8 885 708 - 1,062 Pass 1.01 LCS-AP-061522 3/21/2022 Zn-65 769 +/- 18 671 537 - 0,805 Pass 1.15 SPDW-40164 6/21/2022 Ra-228 14.2 +/- 1.8 13.4 9.4 - 17.4 Pass 1.06 SPDW-40167 6/23/2022 H-3 10,497 +/- 322 10,400 8,320 - 12,480 Pass 1.01 SPDW-40177 6/30/2022 Ra-226 12.1 +/- 0.3 12.3 8.6 - 16.0 Pass 0.98 SPW-1881 6/27/2022 Tc-99 97.1 +/- 1.7 107.8 75.5 - 140.1 Pass 0.90 SPDW-40253 7/12/2022 Ra-226 11.6 +/- 0.3 12.3 8.6 - 16.0 Pass 0.94 SPW-40179 7/15/2022 H-3 10,467 +/- 324 10,400 8,320 - 12,480 Pass 1.01 SPDW-40200 7/26/2022 Gr. Alpha 21.1 +/- 1.3 32.5 16.3 - 48.8 Pass 0.65 SPDW-40200 7/26/2022 Gr. Beta 61.0 +/- 1.6 62.9 50.3 - 75.5 Pass 0.97 SPDW-40220 7/29/2022 H-3 10,553 +/- 326 10,400 8,320 - 12,480 Pass 1.01 SPDW-40212 8/9/2022 Ra-228 14.5 +/- 2.3 13.4 9.4 - 17.4 Pass 1.08 SPDW-40220 8/16/2022 H-3 10,613 +/- 326 10,400 8,320 - 12,480 Pass 1.02 SPDW-40239 8/22/2022 Gr. Alpha 37.1 +/- 2.0 60.2 31.5 - 74.8 Pass 0.62 SPDW-40239 8/22/2022 Gr. Beta 16.6 +/- 0.9 17.7 10.1 - 25.9 Pass 0.94 SPDW-40255 8/12/2022 Ra-226 9.1 +/- 0.3 12.3 8.6 - 16.0 Pass 0.74 SPDW-40265 9/2/2022 H-3 10,555 +/- 325 10,400 8,320 - 13,520 Pass 1.01 SPDW-40267 9/6/2022 Ra-228 14.0 +/- 1.4 13.4 9.4 - 17.4 Pass 1.04 SPDW-40283 9/9/2022 H-3 10,059 +/- 318 10,400 8,320 - 12,480 Pass 0.97 SPDW-40300 8/31/2022 Ra-226 11.2 +/- 0.3 12.3 8.6 - 16.0 Pass 0.91 SPMI-2918 9/19/2022 Sr-90 17.9 +/- 1.0 17.1 13.7 - 20.5 Pass 1.05 SPDW-40321 9/20/2022 Ra-226 13.2 +/- 0.5 12.3 8.6 - 16.0 Pass 1.07 SPDW-40305 9/21/2022 Ra-228 12.5 +/- 1.8 13.4 9.4 - 17.4 Pass 0.93 SPDW-40294 9/20/2022 Gr. Alpha 35.1 +/- 2.0 60.2 31.5 - 74.8 Pass 0.58 SPDW-40294 9/20/2022 Gr. Beta 16.5 +/- 1.0 17.7 10.1 - 25.9 Pass 0.93 SPDW-40303 9/19/2022 H-3 10,078 +/- 316 10,400 8,320 - 12,480 Pass 0.97 SPDW-40361 10/12/2022 Ra-226 10.0 +/- 0.3 12.3 8.6 - 16.0 Pass 0.81 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 Acceptance criteria are listed in Attachment A of this report.

A-7

TABLE A-3. Intralaboratory "Spiked" Samples Concentrationa Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPDW-40344 11/3/2022 Ra-228 13.2 +/- 1.8 13.4 9.4 - 17.4 Pass 0.99 SPDW-40346 11/8/2022 Gr. Alpha 42.0 +/- 2.2 60.2 31.5 - 74.8 Pass 0.70 SPDW-40346 11/8/2022 Gr. Beta 16.6 +/- 1.0 17.7 10.1 - 25.9 Pass 0.94 SPDW-40352 11/17/2022 Sr-90 18.8 +/- 1.2 17.1 13.7 - 20.5 Pass 1.10 SPDW-40355 11/18/2022 H-3 10,143 +/- 316 10,400 8,320 - 12,480 Pass 0.98 SPDW-40364 11/30/2022 Gr. Alpha 38.4 +/- 1.5 60.2 31.5 - 74.8 Pass 0.64 SPDW-40364 11/30/2022 Gr. Beta 30.9 +/- 1.2 17.7 10.1 - 25.9 Pass 1.75 LCS-W-110822 2/1/2022 Cs-137 222 +/- 10 206 165 - 247 Pass 1.08 LCS-W-110822 2/1/2022 Co-57 1,060 +/- 117 973 778 - 1,168 Pass 1.09 LCS-W-110822 2/1/2022 Co-60 250 +/-8 251 201 - 301 Pass 1.00 LCS-W-110822 2/1/2022 Mn-54 537 +/- 18 511 409 - 613 Pass 1.05 LCS-W-110822 2/1/2022 Zn-65 673 +/- 35 708 566 - 850 Pass 0.95 SPDW-40372 11/21/2022 Ra-226 11.3 +/- 0.3 12.3 8.6 - 16.0 Pass 0.92 SPU-3883 12/1/2022 H-3 21,694 +/- 1,387 23,900 19,120 - 28,680 Pass 0.91 SPW-3950 12/1/2022 Ni-63 1,937 +/- 28 2,135.0 1,495 - 2,776 Pass 0.91 SPDW-40366 12/2/2022 H-3 22,466 +/- 464 23,900 19,120 - 28,680 Pass 0.94 SPW-3969 12/2/2022 Ni-63 2,123 +/- 29 2,135.0 1,495 - 2,776 Pass 0.99 SPW-3881 12/5/2022 Tc-99 85.0 +/- 1.6 107.8 75.5 - 140.1 Pass 0.79 SPDW-40374 12/12/2022 H-3 22,554 +/- 463 23,900 19,120 - 28,680 Pass 0.94 SPDW-40382 12/12/2022 Ra-226 12.7 +/- 0.4 12.3 8.6 - 16.0 Pass 1.03 SPDW-40380 12/22/2022 H-3 22,200 +/- 462 23,900.0 19,120 - 28,680 Pass 0.93 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 Acceptance criteria are listed in Attachment A of this report.

A-8

TABLE A-4. Intralaboratory "Blank" Samples Concentrationa b c Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityd Criteria (4.66 s)

SPDW-30304 Water 1/5/2022 Gr. Alpha 0.47 0.07 +/- 0.33 2 SPDW-30304 Water 1/5/2022 Gr. Beta 0.77 0.33 +/- 0.55 4 SPDW-40001 Water 1/7/2022 H-3 156 3 +/- 75 200 SPDW-40012 Water 1/6/2022 Ra-226 0.06 -0.08 +/- 0.05 2 SPDW-40016 Water 7/12/2021 H-3 165 -41 +/- 85 200 SPDW-40017 Water 7/21/2021 H-3 165 0 +/- 87 200 SPDW-40021 Water 2/3/2022 Ra-228 1.15 0.20 +/- 0.56 2 SPDW-40023 Water 2/4/2022 H-3 162 78 +/- 81 200 SPDW-40027 Water 2/11/2022 H-3 168 26 +/- 85 200 SPDW-40036 Water 2/25/2022 H-3 160 55 +/- 78 200 SPDW-40044 Water 3/3/2022 Sr-89 0.62 0.20 +/- 0.44 5 SPDW-40044 Water 3/3/2022 Sr-90 0.60 -0.18 +/- 0.26 1 SPDW-40046 Water 3/3/2022 I-131 0.12 0.04 +/- 0.08 1 SPDW-40051 Water 3/10/2022 H-3 161 17 +/- 78 200 SPDW-40063 Water 3/18/2022 H-3 177 60 +/- 96 200 SPDW-40072 Water 3/22/2022 Ra-228 1.20 0.29 +/- 0.56 2 SPDW-40074 Water 1/28/2022 Ra-226 0.06 0.08 +/- 0.14 2 SPDW-40077 Water 3/14/2022 U-234 0.19 0.17 +/- 0.20 1 SPDW-40077 Water 3/14/2022 U-238 0.19 -0.04 +/- 0.14 1 SPW-597 Water 3/31/2022 Fe-55 1159 92 +/- 708 2000 SPDW-40081 Water 3/30/2022 Ra-228 1.66 0.19 +/- 0.79 2 SPDW-40082 Water 4/1/2022 H-3 170 60 +/- 85 200 SPDW-40084 Water 4/4/2022 Sr-89 0.51 0.28 +/- 0.41 5 SPDW-40084 Water 4/4/2022 Sr-90 0.55 0.01 +/- 0.25 1 SPDW-40088 Water 4/8/2022 H-3 166.00 66.00 +/- 83.00 200 SPDW-40129 Water 4/8/2022 Ra-226 0.01 0.11 +/- 0.02 2 SPDW-40098 Water 4/11/2022 Gr. Alpha 0.42 0.06 +/- 0.30 2 SPDW-40098 Water 4/11/2022 Gr. Beta 0.75 -0.73 +/- 0.50 4 SPDW-40101 Water 4/14/2022 H-3 164 37 +/- 84 200 SPDW-40120 Water 4/22/2022 H-3 109 74 +/- 84 200 SPDW-40131 Water 5/3/2022 H-3 165 75 +/- 86 200 SPDW-40141 Water 5/5/2022 Ra-226 0.08 0.01 +/- 0.07 2 SPU-1297 Urine 5/12/2022 H-3 1325 674 +/- 733 200 SPDW-40138 Water 5/18/2022 H-3 163 69 +/- 80 200 SPDW-40156 Water 5/25/2022 Ra-226 0.04 0.09 +/- 0.03 2 SPW-1855 Water 6/14/2022 Sr-89 0.63 0.02 +/- 0.49 5 SPW-1855 Water 6/14/2022 Sr-90 0.57 0.00 +/- 0.26 1 SPDW-40172 Water 6/14/2022 Ra-226 0.03 0.06 +/- 0.03 2 SPDW-40163 Water 6/21/2022 Ra-228 0.84 0.30 +/- 0.43 2 SPDW-40166 Water 6/23/2022 H-3 162 46 +/- 78 200 SPW-1876 Water 6/27/2022 C-14 9.99 -9.14 +/- 5.92 200 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-9

TABLE A-4. Intralaboratory "Blank" Samples Concentrationa b c Lab Code Sample Date Analysis Laboratory results (4.66s) Acceptance Type LLD Activityd Criteria (4.66 s)

SPW-1878 Water 6/27/2022 Fe-55 522 -200 +/- 306 2000 SPW-1880 Water 6/27/2022 Tc-99 11.4 -6.0 +/- 6.8 200 SPW-1891 Water 6/28/2022 Ni-63 75.9 0.0 +/- 46.1 200 SPDW-40176 Water 6/30/2022 Ra-226 0.04 0.06 +/- 0.04 2 SPDW-40252 Water 7/12/2022 Ra-226 0.04 -0.06 +/- 0.10 2 SPDW-40178 Water 7/15/2022 H-3 167 58 +/- 83 200 SPW-2220 Water 7/21/2022 C-14 3.52 -3.15 +/- 2.09 200 SPDW-40199 Water 7/26/2022 Gr. Alpha 0.80 0.47 +/- 0.58 2 SPDW-40199 Water 7/26/2022 Gr. Beta 0.77 0.98 +/- 0.57 4 SPDW-40207 Water 7/29/2022 H-3 161 -21 +/- 84 200 SPDW-40211 Water 8/9/2022 Ra-228 1.23 0.20 +/- 0.59 2 SPDW-40219 Water 8/16/2022 H-3 161 68 +/- 80 200 SPDW-40238 Water 8/22/2022 Gr. Alpha 0.47 0.05 +/- 0.34 2 SPDW-40238 Water 8/22/2022 Gr. Beta 0.75 0.34 +/- 0.54 4 SPDW-40263 Water 9/2/2022 I-131 0.17 -0.05 +/- 0.09 1 SPDW-40264 Water 9/2/2022 H-3 162 82 +/- 81 200 SPDW-40264 Water 9/6/2022 Ra-228 1.11 -0.22 +/- 0.49 2 SPDW-40282 Water 9/9/2022 H-3 163 71 +/- 83 200 SPDW-40291 Water 9/16/2022 I-131 0.11 -0.01 +/- 0.08 1 SPMI-2917 Milk 9/19/2022 Sr-89 0.58 0.03 +/- 0.47 5 SPMI-2917 Milk 9/19/2022 Sr-90 0.51 0.30 +/- 0.27 1 SPDW-40293 Water 9/20/2022 Gr. Alpha 0.52 0.10 +/- 0.37 2 SPDW-40293 Water 9/20/2022 Gr. Beta 0.78 0.26 +/- 0.55 4 SPDW-40302 Water 9/19/2022 H-3 160 97 +/- 80 200 SPDW-40304 Water 9/21/2022 Ra-228 0.87 0.09 +/- 0.41 2 SPDW-40311 Water 9/30/2022 I-131 0.15 0.00 +/- 0.08 1 SPDW-40345 Water 11/8/2022 Gr. Alpha 0.53 -0.17 +/- 0.36 2 SPDW-40345 Water 11/8/2022 Gr. Beta 0.78 -0.05 +/- 0.54 4 SPDW-40350 Water 11/11/2022 H-3 166 96 +/- 84 200 SPDW-40352 Water 11/17/2022 Sr-89 0.66 -0.01 +/- 0.53 5 SPDW-40352 Water 11/17/2022 Sr-90 0.61 0.11 +/- 0.29 1 SPDW-40354 Water 11/18/2022 H-3 155 21 +/- 76 200 SPDW-40354 Water 11/18/2022 I-131 0.18 -0.11 +/- 0.09 1 SPW-3880 Water 12/1/2022 Tc-99 5.58 2.99 +/- 3.44 200 SPU-3882 Urine 12/1/2022 H-3 1157 599 +/- 642 2000 SPW-3949 Water 12/2/2022 Ni-63 16.3 9.0 +/- 10.0 200 SPW-3968 Water 12/2/2022 Ni-63 15.9 0.0 +/- 9.6 200 SPDW-40370 Water 12/7/2022 I-131 0.10 -0.04 +/- 0.06 1 SPDW-40381 Ra-226 12/12/2022 Ra-226 0.06 -0.04 +/- 0.05 2 SPDW-40379 H-3 12/22/2022 H-3 162 107 +/- 84 200 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-10

TABLE A-5. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance CF-20,21 1/3/2022 Gr. Beta 7.07 +/- 0.26 7.05 +/- 0.26 7.06 +/- 0.18 Pass CF-20,21 1/3/2022 K-40 9.06 +/- 0.28 7.54 +/- 0.70 8.30 +/- 0.38 Pass U-135,136 1/20/2022 Beta (-K40) 5.74 +/- 1.63 3.53 +/- 1.40 4.64 +/- 1.07 Pass DW-40019,40020 1/25/2022 Gr. Alpha 5.01 +/- 1.34 6.01 +/- 1.40 5.51 +/- 0.97 Pass DW-40019,40020 1/25/2022 Ra-226 1.19 +/- 0.15 0.98 +/- 0.17 1.09 +/- 0.11 Pass DW-40019,40020 1/25/2022 Ra-228 4.84 +/- 0.98 5.38 +/- 1.05 5.11 +/- 0.72 Pass W-159,160 1/27/2022 Gr. Alpha 3.04 +/- 3.19 3.85 +/- 2.04 3.45 +/- 1.89 Pass W-159,160 1/27/2022 Gr. Beta 14.4 +/- 2.7 13.1 +/- 1.5 13.7 +/- 1.5 Pass W-159,160 1/27/2022 Ra-226 0.94 +/- 0.19 1.11 +/- 0.30 1.03 +/- 0.18 Pass W-159,160 1/27/2022 Ra-228 3.14 +/- 0.96 3.39 +/- 0.96 3.27 +/- 0.68 Pass W-888,889 2/14/2022 Ni-63 119 +/- 47 95 +/- 48 107 +/- 34 Pass S-391,392 2/17/2022 K-40 11.2 +/- 0.8 9.8 +/- 0.7 10.5 +/- 0.5 Pass DW-40040,40041 2/25/2022 Ra-226 2.78 +/- 0.21 2.01 +/- 0.22 2.40 +/- 0.15 Pass DW-40040,40041 2/25/2022 Ra-228 3.15 +/- 0.95 3.29 +/- 0.94 3.22 +/- 0.67 Pass AP-022821A,B 2/28/2022 Gr. Beta 0.038 +/- 0.005 0.039 +/- 0.005 0.039 +/- 0.003 Pass S-435,436 3/2/2022 Pb-214 1.42 +/- 0.11 1.29 +/- 0.15 1.36 +/- 0.09 Pass S-435,436 3/2/2022 Ac-228 0.94 +/- 0.20 1.06 +/- 0.15 1.00 +/- 0.13 Pass AP-030721A,B 3/7/2022 Gr. Beta 0.038 +/- 0.005 0.038 +/- 0.005 0.038 +/- 0.004 Pass S-477,478 3/8/2022 K-40 6.58 +/- 0.23 6.73 +/- 0.24 6.66 +/- 0.17 Pass SWT-657,658 3/9/2022 Gr. Beta 1.00 +/- 0.54 1.20 +/- 0.57 1.10 +/- 0.39 Pass DW-40059,40060 3/11/2022 Ra-226 0.40 +/- 0.10 0.53 +/- 0.11 0.47 +/- 0.07 Pass DW-40059,40060 3/11/2022 Ra-228 0.40 +/- 0.60 0.72 +/- 0.60 0.56 +/- 0.42 Pass AP-0315221A,B 3/15/2022 Gr. Beta 0.025 +/- 0.003 0.027 +/- 0.003 0.026 +/- 0.002 Pass AP-1161,1162 3/29/2022 Be-7 0.07 +/- 0.02 0.07 +/- 0.02 0.07 +/- 0.01 Pass DW-700,701 4/4/2022 Gr. Alpha 1.70 +/- 1.83 2.82 +/- 1.78 2.26 +/- 1.28 Pass DW-700,701 4/4/2022 Gr. Beta 3.33 +/- 1.26 4.29 +/- 1.30 3.81 +/- 0.91 Pass DW-700,701 4/4/2022 Ra-226 0.50 +/- 0.16 0.65 +/- 0.14 0.58 +/- 0.11 Pass DW-700,701 4/4/2022 Ra-228 5.04 +/- 1.00 4.79 +/- 0.99 4.92 +/- 0.70 Pass SG-706,707 4/4/2022 Gr. Alpha 25.7 +/- 3.6 21.7 +/- 3.2 23.7 +/- 2.4 Pass SG-706,707 4/4/2022 Gr. Beta 23.2 +/- 1.7 24.5 +/- 1.8 23.9 +/- 1.3 Pass SG-706,707 4/4/2022 Ra-226 2.47 +/- 0.10 2.62 +/- 0.09 2.55 +/- 0.07 Pass SG-706,707 4/4/2022 Ra-228 4.63 +/- 0.22 4.40 +/- 0.20 4.52 +/- 0.15 Pass DW-40091,40092 4/5/2022 Gr. Alpha 0.43 +/- 0.78 0.57 +/- 0.82 0.50 +/- 0.57 Pass DW-40091,40092 4/6/2022 Ra-226 0.21 +/- 0.10 0.24 +/- 0.08 0.23 +/- 0.06 Pass U-951,952 4/13/2022 Gr. Beta 2.72 +/- 1.55 4.11 +/- 1.45 3.41 +/- 1.06 Pass U-951,952 4/13/2022 H-3 861 +/- 723 1,015 +/- 732 938 +/- 514 Pass W-1014,1015 4/21/2022 Ra-228 1.76 +/- 0.93 1.51 +/- 0.92 1.64 +/- 0.65 Pass W-1014,1015 4/21/2022 Ra-226 1.23 +/- 0.27 1.36 +/- 0.29 1.30 +/- 0.20 Pass DW-40117,40118 4/26/2022 Ra-226 0.33 +/- 0.22 0.29 +/- 0.09 0.31 +/- 0.12 Pass SW-1034,1035 4/26/2022 H-3 15,159 +/- 386 16,022 +/- 396 15,591 +/- 277 Pass DW-40124,40125 4/28/2022 Gr. Alpha 0.70 +/- 0.56 0.60 +/- 0.68 0.65 +/- 0.44 Pass A-11

TABLE A-5. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance SO-1266,1267 5/9/2022 K-40 17.7 +/- 0.8 16.0 +/- 1.0 16.8 +/- 0.6 Pass SO-1266,1267 5/9/2022 Pb-214 0.42 +/- 0.05 0.30 +/- 0.06 0.36 +/- 0.04 Pass SO-1266,1267 5/9/2022 Ac-228 0.58 +/- 0.09 0.61 +/- 0.02 0.60 +/- 0.05 Pass AP-51721,51722 5/17/2022 Gr. Beta 0.023 +/- 0.003 0.022 +/- 0.003 0.022 +/- 0.002 Pass SG-1368,1369 5/18/2022 Pb-214 4.31 +/- 0.27 5.78 +/- 0.31 5.05 +/- 0.21 Pass SG-1368,1369 5/18/2022 Ac-228 6.08 +/- 0.56 6.59 +/- 0.50 6.34 +/- 0.38 Pass SG-1368,1369 5/18/2022 Gr. Alpha 37.8 +/- 1.7 40.6 +/- 1.7 39.2 +/- 1.2 Pass SG-1368,1369 5/18/2022 Gr. Beta 34.8 +/- 0.8 31.2 +/- 0.8 33.0 +/- 0.6 Pass DW-40143,40144 5/19/2022 Ra-226 1.17 +/- 0.25 1.56 +/- 0.16 1.37 +/- 0.15 Pass DW-40143,40144 5/19/2022 Ra-228 1.29 +/- 0.72 2.14 +/- 0.85 1.72 +/- 0.56 Pass AP-53121,53122 5/31/2022 Gr. Beta 0.016 +/- 0.003 0.014 +/- 0.003 0.015 +/- 0.002 Pass PM-1646,1647 6/1/2022 K-40 14.2 +/- 0.8 13.9 +/- 0.4 14.1 +/- 0.5 Pass S-1731,1732 6/6/2022 K-40 16.5 +/- 0.8 15.8 +/- 1.9 16.2 +/- 1.0 Pass DW-40152,40153 6/7/2022 Gr. Alpha 4.00 +/- 0.74 3.50 +/- 0.70 3.75 +/- 0.51 Pass AP-60721,60722 6/7/2022 Gr. Beta 0.014 +/- 0.003 0.013 +/- 0.003 0.013 +/- 0.002 Pass S-1773,1774 6/13/2022 Be-7 1.29 +/- 0.28 1.56 +/- 0.15 1.43 +/- 0.16 Pass S-1773,1774 6/13/2022 K-40 13.8 +/- 0.7 13.3 +/- 0.7 13.6 +/- 0.5 Pass AP-61321,61322 6/13/2022 Gr. Beta 0.023 +/- 0.004 0.023 +/- 0.004 0.023 +/- 0.003 Pass AP-62021,62022 6/20/2022 Gr. Beta 0.031 +/- 0.005 0.031 +/- 0.005 0.031 +/- 0.003 Pass AP-62721,62722 6/27/2022 Gr. Beta 0.027 +/- 0.005 0.027 +/- 0.005 0.027 +/- 0.003 Pass DW-40169,40170 6/29/2022 Ra-228 1.06 +/- 0.70 0.17 +/- 0.54 0.62 +/- 0.44 Pass DW-40169,40170 6/29/2022 Ra-226 0.22 +/- 0.12 0.03 +/- 0.12 0.13 +/- 0.08 Pass W-2014,2015 7/4/2022 Ra-226 0.73 +/- 0.24 0.72 +/- 0.27 0.73 +/- 0.18 Pass S-2035,2036 7/7/2022 Pb-214 1.00 +/- 0.09 1.65 +/- 0.11 1.33 +/- 0.07 Pass S-2035,2036 7/7/2022 Ac-228 1.16 +/- 0.20 1.09 +/- 0.18 1.13 +/- 0.13 Pass S-2152,2153 7/13/2022 Pb-214 0.58 +/- 0.07 0.65 +/- 0.05 0.62 +/- 0.04 Pass S-2152,2153 7/13/2022 Ac-228 0.62 +/- 0.11 0.61 +/- 0.08 0.62 +/- 0.07 Pass S-2152,2153 7/18/2022 K-40 10.9 +/- 0.8 12.5 +/- 0.8 11.7 +/- 0.6 Pass DW-40192,40193 7/19/2022 Ra-226 0.80 +/- 0.10 0.70 +/- 0.10 0.75 +/- 0.07 Pass DW-40192,40193 7/19/2022 Ra-228 0.03 +/- 0.60 1.20 +/- 0.68 0.62 +/- 0.45 Pass DW-40205,40206 7/27/2022 Ra-226 0.32 +/- 0.15 0.28 +/- 0.10 0.30 +/- 0.09 Pass DW-40205,40206 7/27/2022 Ra-228 0.34 +/- 0.59 0.65 +/- 0.62 0.50 +/- 0.43 Pass G-2343,2344 8/1/2022 Be-7 3.00 +/- 0.31 3.04 +/- 0.26 3.02 +/- 0.20 Pass G-2343,2344 8/1/2022 K-40 5.82 +/- 0.53 6.03 +/- 0.39 5.93 +/- 0.33 Pass W-2406,2407 8/1/2022 Gr. Alpha 4.27 +/- 3.20 4.60 +/- 2.95 4.44 +/- 2.18 Pass W-2406,2407 8/1/2022 Gr. Beta 11.1 +/- 2.6 10.5 +/- 2.4 10.8 +/- 1.8 Pass W-2406,2407 8/1/2022 Ra-226 1.83 +/- 0.28 2.31 +/- 0.35 2.07 +/- 0.22 Pass W-2406,2407 8/1/2022 Ra-228 2.87 +/- 0.95 2.43 +/- 0.93 2.65 +/- 0.66 Pass DW-40213,40214 8/3/2022 Gr. Alpha 0.60 +/- 0.60 -0.30 +/- 0.70 0.15 +/- 0.46 Pass DW-40213,40214 8/3/2022 Gr. Beta 0.72 +/- 0.59 0.85 +/- 0.54 0.79 +/- 0.40 Pass DW-40225,40226 8/10/2022 Ra-226 0.53 +/- 0.13 0.41 +/- 0.10 0.47 +/- 0.08 Pass A-12

TABLE A-5. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance DW-40225,40226 8/10/2022 Ra-228 1.20 +/- 0.71 1.00 +/- 0.71 1.10 +/- 0.50 Pass S-2553,2554 8/18/2022 K-40 1.74 +/- 0.27 1.33 +/- 0.22 1.54 +/- 0.17 Pass WW-2774,2775 8/19/2022 H-3 138 +/- 86 171 +/- 88 155 +/- 62 Pass S-2797,2798 8/22/2022 K-40 19.0 +/- 0.2 18.7 +/- 0.2 18.9 +/- 0.1 Pass DW-40241,40242 8/23/2022 Ra-226 3.10 +/- 0.19 3.54 +/- 0.19 3.32 +/- 0.13 Pass DW-40241,40242 8/23/2022 Ra-228 6.05 +/- 0.98 6.61 +/- 1.02 6.33 +/- 0.71 Pass W-2681,2682 8/24/2022 H-3 1054 +/- 126 962 +/- 122 1008 +/- 88 Pass DW-40259,40260 8/30/2022 Ra-228 0.49 +/- 0.11 0.11 +/- 0.10 0.30 +/- 0.07 Pass DW-40259,40260 8/30/2022 Ra-226 0.49 +/- 0.11 0.11 +/- 0.09 0.30 +/- 0.07 Pass DW-40259,40260 8/30/2022 Ra-228 0.00 +/- 0.57 0.47 +/- 61.00 0.24 +/- 30.50 Pass AP-830227A,B 8/30/2022 Gr. Beta 0.027 +/- 0.004 0.026 +/- 0.004 0.027 +/- 0.003 Pass AP-808227A,B 8/30/2022 Gr. Beta 0.016 +/- 0.004 0.018 +/- 0.004 0.017 +/- 0.003 Pass VE-2702,2703 8/30/2022 K-40 2.58 +/- 0.12 2.62 +/- 0.27 2.60 +/- 0.15 Pass VE-2702,2703 8/30/2022 Be-7 0.21 +/- 0.05 0.30 +/- 0.13 0.26 +/- 0.07 Pass VE-2702,2703 8/30/2022 Sr-90 0.002 +/- 0.001 0.002 +/- 0.001 0.002 +/- 0.001 Pass SG-3978,3979 9/7/2022 Gr. Alpha 470 +/- 29 552 +/- 32 511 +/- 22 Pass SG-3978,3979 9/7/2022 Pb-214 31.3 +/- 0.8 30.9 +/- 1.6 31.1 +/- 0.9 Pass SG-3978,3979 9/7/2022 Ac-228 41.6 +/- 1.5 43.2 +/- 2.8 42.4 +/- 1.6 Pass SG-2844 9/9/2022 Gr. Alpha 25.7 +/- 4.0 18.7 +/- 3.5 22.2 +/- 2.7 Pass SG-2844 9/9/2022 Gr. Beta 21.3 +/- 2.0 22.2 +/- 2.0 21.8 +/- 1.4 Pass SG-2844 9/9/2022 Pb-214 4.35 +/- 0.12 4.43 +/- 0.10 4.39 +/- 0.08 Pass SG-2844 9/9/2022 Ac-228 5.37 +/- 0.22 5.39 +/- 0.17 5.38 +/- 0.14 Pass DW-40279,40280 9/9/2022 Ra-226 3.92 +/- 0.23 4.18 +/- 0.25 4.05 +/- 0.17 Pass DW-40279,40280 9/9/2022 Ra-228 7.05 +/- 1.09 6.58 +/- 1.06 6.82 +/- 0.76 Pass SG-2841,2842 9/9/2022 Pb-214 0.90 +/- 0.50 1.16 +/- 0.12 1.03 +/- 0.26 Pass SG-2841,2842 9/9/2022 Ac-228 0.91 +/- 0.10 0.88 +/- 0.17 0.90 +/- 0.10 Pass DW-40295,40296 9/13/2022 Gr. Alpha 0.79 +/- 0.97 0.64 +/- 0.97 0.72 +/- 0.69 Pass DW-40295,40296 9/14/2022 Ra-226 2.75 +/- 0.32 2.89 +/- 0.24 2.82 +/- 0.20 Pass DW-40295,40296 9/14/2022 Ra-228 2.88 +/- 0.78 2.95 +/- 0.76 2.92 +/- 0.54 Pass SG-2862,2863 9/14/2022 Pb-214 11.8 +/- 0.2 11.2 +/- 0.2 11.5 +/- 0.1 Pass SG-2862,2863 9/14/2022 Ac-228 6.95 +/- 0.24 7.18 +/- 0.19 7.07 +/- 0.15 Pass SG-3119,3120 9/24/2022 Pb-214 3.10 +/- 0.21 3.10 +/- 0.22 3.10 +/- 0.15 Pass SG-3119,3120 9/24/2022 Ac-228 2.16 +/- 0.38 2.30 +/- 0.33 2.23 +/- 0.25 Pass SG-3075,3076 9/28/2022 Gr. Alpha 174 +/- 10 158 +/- 10 166 +/-7 Pass SG-3075,3076 9/28/2022 Pb-214 23.6 +/- 0.9 24.4 +/- 0.4 24.0 +/- 0.5 Pass SG-3075,3076 9/28/2022 Ac-228 38.2 +/- 1.9 35.8 +/- 0.8 37.0 +/- 1.0 Pass DW-40318,40319 9/29/2022 Gr. Alpha 1.02 +/- 0.94 1.79 +/- 1.68 1.41 +/- 0.96 Pass AP-100321A/B 10/3/2022 Gr. Beta 0.015 +/- 0.003 0.011 +/- 0.003 0.013 +/- 0.002 Pass SO-3140,3141 10/3/2022 Be-7 0.353 +/- 0.180 0.304 +/- 0.163 0.328 +/- 0.121 Pass SO-3140,3141 10/3/2022 K-40 11.2 +/- 0.6 11.0 +/- 0.6 11.1 +/- 0.4 Pass SO-3140,3141 10/3/2022 Cs-137 0.055 +/- 0.016 0.069 +/- 0.020 0.062 +/- 0.013 Pass SO-3140,3141 10/3/2022 Tl-208 0.132 +/- 0.022 0.114 +/- 0.024 0.123 +/- 0.016 Pass A-13

TABLE A-5. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance SO-3140,3141 10/3/2022 Bi-214 0.315 +/- 0.041 0.390 +/- 0.041 0.353 +/- 0.029 Pass SO-3140,3141 10/3/2022 Pb-212 0.344 +/- 0.029 0.357 +/- 0.029 0.351 +/- 0.020 Pass SO-3140,3141 10/3/2022 Pb-214 0.362 +/- 0.043 0.446 +/- 0.047 0.404 +/- 0.032 Pass SO-3140,3141 10/3/2022 Ra-226 0.602 +/- 0.250 0.768 +/- 0.248 0.685 +/- 0.176 Pass SO-3140,3141 10/3/2022 Ac-228 0.442 +/- 0.101 0.405 +/- 0.083 0.423 +/- 0.066 Pass SO-3140,3141 10/3/2022 Gr. Alpha 4.07 +/- 1.77 4.43 +/- 2.17 4.25 +/- 1.40 Pass SO-3140,3141 10/3/2022 Gr. Beta 15.6 +/- 1.6 17.0 +/- 1.5 16.3 +/- 1.1 Pass AP-101021A/B 10/10/2022 Gr. Beta 0.037 +/- 0.005 0.040 +/- 0.005 0.039 +/- 0.004 Pass S-3501,3502 10/18/2022 K-40 16.3 +/- 1.2 16.3 +/- 1.3 16.3 +/- 0.9 Pass AP-101821A/B 10/18/2022 Gr. Beta 0.026 +/- 0.003 0.027 +/- 0.003 0.026 +/- 0.002 Pass DW-40328,40329 10/25/2022 Ra-226 2.13 +/- 0.18 2.17 +/- 0.28 2.15 +/- 0.17 Pass AP-102621A/B 10/26/2022 Gr. Beta 0.051 +/- 0.005 0.047 +/- 0.005 0.049 +/- 0.003 Pass SG-3557,3558 11/1/2022 Gr. Alpha 24.5 +/- 4.0 25.0 +/- 4.0 24.8 +/- 2.8 Pass SG-3557,3558 11/1/2022 Gr. Beta 26.7 +/- 2.2 29.3 +/- 2.3 28.0 +/- 1.6 Pass SG-3557,3558 11/1/2022 Pb-214 9.23 +/- 0.15 9.23 +/- 0.32 9.23 +/- 0.18 Pass SG-3557,3558 11/1/2022 Ac-228 7.35 +/- 0.31 8.26 +/- 0.63 7.81 +/- 0.35 Pass AP-110221A/B 11/2/2022 Gr. Beta 0.020 +/- 0.003 0.020 +/- 0.003 0.020 +/- 0.002 Pass DW-40341,40342 11/7/2022 Ra-226 1.18 +/- 0.15 0.89 +/- 0.14 1.04 +/- 0.10 Pass DW-40341,40342 11/7/2022 Ra-228 1.98 +/- 0.95 3.32 +/- 1.12 2.65 +/- 0.73 Pass AP-110921A/B 11/9/2022 Gr. Beta 0.025 +/- 0.003 0.025 +/- 0.003 0.025 +/- 0.002 Pass AP-111621A/B 11/16/2022 Gr. Beta 0.013 +/- 0.002 0.015 +/- 0.002 0.014 +/- 0.002 Pass AP-112321A/B 11/23/2022 Gr. Beta 0.034 +/- 0.004 0.031 +/- 0.004 0.032 +/- 0.003 Pass AP-113021A/B 11/30/2022 Gr. Beta 0.056 +/- 0.005 0.058 +/- 0.005 0.057 +/- 0.003 Pass SG-4016,4017 12/5/2022 Gr. Alpha 24.5 +/- 4.0 25.0 +/- 4.0 24.7 +/- 2.9 Pass SG-4016,4017 12/5/2022 Gr. Beta 26.7 +/- 2.2 29.3 +/- 2.3 28.0 +/- 1.6 Pass SG-4016,4017 12/5/2022 Pb-214 8.64 +/- 0.30 9.28 +/- 0.30 8.96 +/- 0.21 Pass SG-4016,4017 12/5/2022 Ac-228 10.8 +/- 0.8 10.0 +/- 0.8 10.4 +/- 0.6 Pass AP-120721A/B 12/7/2022 Gr. Beta 0.034 +/- 0.003 0.030 +/- 0.003 0.032 +/- 0.002 Pass DW-40375,40376 12/14/2022 Ra-228 5.05 +/- 0.96 7.15 +/- 1.09 6.10 +/- 0.73 Pass DW-40375,40376 12/14/2022 Ra-226 3.33 +/- 0.27 4.28 +/- 0.29 3.81 +/- 0.20 Pass AP-121621A/B 12/16/2022 Gr. Beta 0.039 +/- 0.004 0.033 +/- 0.004 0.036 +/- 0.003 Pass AP-122721A/B 12/27/2022 Gr. Beta 0.018 +/- 0.002 0.016 +/- 0.002 0.017 +/- 0.001 Pass AP-122821A/B 12/28/2022 Gr. Beta 0.042 +/- 0.003 0.039 +/- 0.003 0.041 +/- 0.002 Pass Note: Duplicate analyses are performed on every twentieth sample received. 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 AP (Air Particulate), AV (Aquatic Vegetation), BS (Bottom Sediment), CF (Cattle Feed), CH (Charcoal Canister),

DW (Drinking Water), E (Egg), F (Fish), G (Grass), LW (Lake Water), MI (Milk), 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), U (Urine), VE (Vegetation), W (Water), WW (Well Water).

A-14

Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-506 2/1/2022 Gross Alpha 1.10 +/- 0.14 1.20 0.36 - 2.04 Pass MAAP-506 2/1/2022 Gross Beta 0.83 +/- 0.06 0.681 0.341 - 1.022 Pass MADW-408 2/1/2022 Gross Alpha 0.34 +/- 0.04 0.574 0.172 +/- 0.976 Pass MADW-408 2/1/2022 Gross Beta 6.61 +/- 0.09 7.25 3.63 - 10.88 Pass MASO-504 2/1/2022 Cs-134 738 +/-8 890 623 - 1157 Pass MASO-504 2/1/2022 Cs-137 399 +/-9 365 256 - 475 Pass MASO-504 2/1/2022 Co-57 1479 +/- 375 1400 980 - 1820 Pass MASO-504 2/1/2022 Co-60 433 +/-6 443 310 - 576 Pass MASO-504 2/1/2022 Mn-54 1258 +/- 606 1140 798 - 1482 Pass MASO-504 2/1/2022 Zn-65 -2.11 +/- 4.44 0 NA c Pass MASO-504 2/1/2022 K-40 641 +/- 40 596 417 - 775 Pass MADW-500 2/1/2022 Cs-134 -0.06 +/- 0.11 0 NA c Pass MADW-500 2/1/2022 Cs-137 8.09 +/- 0.33 7.64 5.35 - 9.93 Pass MADW-500 2/1/2022 Co-57 37.04 +/- 0.55 36.0 25.20 - 46.80 Pass MADW-500 2/1/2022 Co-60 8.91 +/- 0.27 9.3 6.5 - 12.1 Pass MADW-500 2/1/2022 Mn-54 20.4 +/- 0.6 18.9 13.2 - 24.6 Pass MADW-500 2/1/2022 Zn-65 28.65 +/- 0.94 26.2 18.3 - 34.1 Pass MADW-500 2/1/2022 K-40 4.80 +/- 2.57 0 NA c Pass MADW-500 2/1/2022 H-3 309 +/- 10 300 210 - 390 Pass MADW-500 2/1/2022 Ra-226 0.83 +/- 0.10 0.8 0.6 - 1.0 Pass MADW-500 2/1/2022 U-234 0.13 +/- 0.01 1.5 1.1 - 2.0 Fail d MADW-500 2/1/2022 U-238 0.12 +/- 0.01 1.54 1.08 - 2.00 Fail d MAAP-502 2/1/2022 Cs-134 0.83 +/- 0.05 0.93 0.65 - 1.21 Pass MAAP-502 2/1/2022 Cs-137 0.87 +/- 0.07 0.726 0.51 - 0.94 Pass MAAP-502 2/1/2022 Co-57 0.87 +/- 0.05 0 NA c Fail e MAAP-502 2/1/2022 Co-60 0.83 +/- 0.07 0.72 0.50 - 0.94 Pass MAAP-502 2/1/2022 Mn-54 0.02 +/- 0.02 0 NA c Pass MAAP-502 2/1/2022 Sr-90 0.72 +/- 0.10 0.54 0.38 - 0.70 Fail f MAVE-507 2/1/2022 Cs-134 7.53 +/- 0.17 7.61 5.33 - 9.89 Pass MAVE-507 2/1/2022 Cs-137 1.60 +/- 0.12 1.52 1.06 - 1.98 Pass MAVE-507 2/1/2022 Co-57 6.21 +/- 0.17 5.09 3.56 - 6.62 Pass MAVE-507 2/1/2022 Co-60 0.01 +/- 0.03 0 NA c Pass MAVE-507 2/1/2022 Mn-54 2.94 +/- 0.14 3 1.81 - 3.37 Pass MAVE-507 2/1/2022 Zn-65 1.69 +/- 0.17 1.47 1.03 - 1.91 Pass MADW-2613 8/1/2022 Gross Alpha 1.39 +/- 0.10 0.90 0.27 - 1.53 Pass MADW-2613 8/1/2022 Gross Beta 1.69 +/- 0.04 1.31 0.66 - 1.97 Pass A-15

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

Concentrationa Reference Known Control b

Lab Code Date Analysis Laboratory result Activity Limits c Acceptance MASO-2737 8/1/2022 Cs-134 523 +/- 5 627 439 - 815 Pass MASO-2737 8/1/2022 Cs-137 1.18 +/- 2.21 0 NA c Pass MASO-2737 8/1/2022 Co-57 715 +/-6 786 550 - 1022 Pass MASO-2737 8/1/2022 Co-60 -0.04 +/- 1.07 0 NA c Pass MASO-2737 8/1/2022 Mn-54 903 +/- 11 841 589 - 1093 Pass MASO-2737 8/1/2022 Zn-65 1227 +/- 19 1140 798 - 1482 Pass MASO-2737 8/1/2022 K-40 595 +/- 37 537 376 - 698 Pass MADW-2733 8/1/2022 Cs-134 13.6 +/- 0.3 17.1 12.0 - 22.2 Pass MADW-2733 8/1/2022 Cs-137 16.0 +/- 0.4 16.8 11.8 - 21.8 Pass MADW-2733 8/1/2022 Co-57 27.5 +/- 0.4 30.0 21.0 - 39.0 Pass MADW-2733 8/1/2022 Co-60 14.4 +/- 0.3 17.0 11.9 - 22.1 Pass MADW-2733 8/1/2022 Mn-54 -0.03 +/- 0.10 0 NA c Pass MADW-2733 8/1/2022 Zn-65 11.5 +/- 0.6 11.3 7.9 - 14.7 Pass MADW-2733 8/1/2022 K-40 3.88 +/- 1.51 0 NA c Pass MADW-2733 8/1/2022 Sr-90 6.79 +/- 0.32 7.73 5.41 - 10.05 Pass MAAP-2735 8/1/2022 Cs-134 -0.001 +/- 0.029 0 NA c Pass MAAP-2735 8/1/2022 Cs-137 1.76 +/- 0.11 1.53 1.07 - 1.99 Pass MAAP-2735 8/1/2022 Co-57 3.50 +/- 0.07 3.32 2.32 - 4.32 Pass MAAP-2735 8/1/2022 Co-60 2.11 +/- 0.08 1.99 1.39 - 2.59 Pass MAAP-2735 8/1/2022 Mn-54 2.18 +/- 0.13 1.88 1.32 - 2.44 Pass MAAP-2735 8/1/2022 Zn-65 1.83 +/- 0.22 1.58 1.11 - 2.05 Pass MAVE-2740 8/1/2022 Cs-134 0.01 +/- 0.06 0 NA c Pass MAVE-2740 8/1/2022 Cs-137 1.15 +/- 0.12 1.083 0.758 - 1.408 Pass MAVE-2740 8/1/2022 Co-57 -0.003 +/- 0.035 0 NA c Pass MAVE-2740 8/1/2022 Co-60 4.71 +/- 0.14 4.62 3.23 - 6.01 Pass MAVE-2740 8/1/2022 Mn-54 2.67 +/- 0.19 2.43 1.70 - 3.16 Pass MAVE-2740 8/1/2022 Zn-65 7.73 +/- 0.39 7.49 5.24 - 9.74 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), MADW (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 Results for a different dataset were mistakenly input into the MAPEP system. If the correct dataset had been entered, the results, (U-234: 1.62 +/- 0.04, U-238: 1.69 +/- 0.04), would have been within the aceptance range.

e MAPEP likely added Eu-152 as an interference to Co-57. Reanalyzing the spectra in duplicate with libraries to account for both Co-57 and Eu-152 yields Co-57 results of 0.03 +/- 0.04 & 18 +/- 0.18 Bq/sample. Which satisfies MAPEP criteria for passing a "false positive" test.

f The analysis of this sample was repeated and the result, (Sr-90: 0.52 +/- 0.09), was within the acceptance range.

A-16

TABLE A-7. Interlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA) a.

MRAD-30 Study Concentration a b

Lab Code Date Analysis Laboratory ERA Control Result Value c Limits d Acceptance ERAP-640 3/21/2022 Cs-134 458 549 356 - 673 Pass ERAP-640 3/21/2022 Cs-137 1430 1,320 1,080 - 1730 Pass ERAP-640 3/21/2022 Co-60 913 885 752 - 1120 Pass ERAP-640 3/21/2022 Mn-54 < 4.1 < 35.0 0.00 - 35.0 Pass ERAP-640 3/21/2022 Zn-65 771 671 550 - 1030 Pass ERAP-639 3/21/2022 Gross Alpha 93.5 94.2 49.2 - 155 Pass ERAP-639 3/21/2022 Gross Beta 60.7 66.8 40.5 - 101.0 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.

A-17

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 2022 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 (313) 0.01 0.029 (260/260) 32,37,49 0.030 (53/53) 0.029 (53/53) 0 (0.010 - 0.063) 3.1 miles WNW (0.013 - 0.063) (0.010 - 0.063) 2.0 miles NNW 0.8 miles NNE Air Radioiodine (pCi/m3) Gamma (24) - 0.090 (20/20) 37 0.098 (4/4) 0.090 (4/4) 0 Be-7 (0.059 - 0.120) 2.0 miles NNW (0.070 - 0.120) (0.059 - 0.120)

Station 53 I-131 (313) 0.07 - (0/260) N/A N/A - (0/53) 0 Direct Radiation Stations 39 & 53 Dosimeters (mR per std. Gamma Dose - 18.7 (160/160) 22 21.7 (4/4) 18.7 (8/8) 0 90-day Qtr.) (176) (12.0 - 23.3) 3.9 miles SSW (20.2 - 22.7) (16.0 - 20.1)

Surface Water JRR (pCi/l) Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (24) 30,000 14,495 (12/12) SP 14,495 (12/12) 165- (1/12) 0 (12,956 - 3.2 miles SSE (12,956 - (165,165) 16,488) 16,488)

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) 20,000 - (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 2022 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 2.8 (12/12) IO-DW 2.9 (12/12) 2.9 (12/12) 0 (1.7 - 4.1) 26.1 miles SSE (1.8 - 3.9) (1.9 - 3.9)

Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (8) 2,000 876- (2/4) IO-DW - (0/4) - (0/4) 0 (194-1558) 26.1 miles SSE Shoreline Gamma (7) JRR Sediment (pCi/kg dry) K-40 - 9,655 (7/7) EEA 12,105 (2/2) 9,941 (2/2) 0 (5,496 - 14,006) 3.0 miles NNW (10,204 -14,006) (9,266 - 10,615)

Cs-137 - 46.6(2-7) EEA 49.6 (1/1) 44.3(1/7) 0 (44.3-49.6) 3.0 miles NNW (49.6-49.6) (44.3-44.3)

Fish - Flesh Gamma (23) JRR (pCi/kg wet)

K-40 - 3,150 (12/12) CCL 3,150 (12/12) 3,554(11/11) 0 (2,423 - 3,561) 0.6 miles E to (2,423 - 3,561) (1,498- 4,239)

NNW Tritium (22) - 12,069 (12/12) CCL 12,069 (12/12) - (0/10) 0 (8,214 - 20,213) 0.6 miles E to (8,214 - 20,213)

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 2022 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 (22) D-2 Garden (pCi/kg wet) Be-7 - 935 (17/17) B-1 1,327 (4/4) 962 (5/5) 0 (348 - 1,327) 0.8 miles NNE (1,010 - 1,668) (584 - 1,517)

K-40 - 5,180 (17/17) B-1 5,664 (4/4) 5,466 (5/5) 0 (3,931 - 6,915) 0.8 miles NNE (4,993 - 6,785) (4,050 - 6,580)

Crops Gamma (4) NR-U1 (pCi/kg wet)

K-40 - 9,349 (2/2) NR-D1 15,733 (1-1) 10,191 (2-2) 0 (2,965-15,733) 8.9 miles S (15,733-15,733) (2,849-17,534)

Bottom Gamma (7) JRR Sediment (pCi/kg dry)

K-40 - 11,454 (5/5) SC 13,075 (1/1) 16,807 (2/2) 0 (10,184-17,567) 0.8 miles NNW (13,075-13,075) (16,047 - 17,567)

Cs-137 - 41.3 (1/1) EEA 41.3 (1/1) 82.9- (2/2) 0 (41.3 - 41.3) 3.0 miles NNW (41.3-41.3) (76.6-89.3)

Fe-55 (2) - 19,712- (2/2) DC 19,712- (2/2) No Control 0 (11,743-27,680) 0.9 miles WNW (11,743-27,680)

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 2022 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 (4) No Control Vegetation (pCi/kg wet) Be-7 - 539 (4/4) SC 629 (2/2) - 0 (286 - 972) 0.8 miles NNW (286 - 972)

K-40 - 2,552 (4/4) EEA 3,682 (1/1) - 0 (1,677- 3,682) 3.0 miles NNW (3,682 - 3,682)

Cs-137 - - (0/4) N/A N/A - 0 Terrestrial Gamma (2) No Control Vegetation (pCi/kg wet) Be-7 - 6,743 (2/2) MUDS 9,867 (1/1) - 0 (3,620 - 9,867) 1.5 miles WNW (9,867 - 9,867)

K-40 - 7,906 (2/2) MUDS 10,763 (1/1) - 0 (5,049 - 10,763) 1.5 miles WNW (10,763-10,763)

Soil Gamma (3) No Control (pCi/kg dry)

K-40 - 11,253 (3/3) EEA 11,203 (2/2) - 0 (10,809-11,597) 3.0 miles NNW (10,809-11,597)

Cs-137 - 172 (3/3) EEA 167 (2/2) - 0 (122-212) 3.0 miles NNW (122-212)

Meat Gamma (2) No Control (pCi/kg wet)

Deer/Turkey K-40 - 3,000 (2/2) R2.6 (Turkey) 3,215(1/1) - 0 (2,786 - 3,215) 2.6 miles N (3,215 - 3,215)

Tritium - 2,331 (2/2) G1.7 (Deer) 4,512 (1/1) No Control 0 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 2022 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 **

(149-4,512) 1.7 miles SE (4,512 - 4,512)

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 2022 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) 27-Dec-21 03-Jan-22 306 0.050 +/- 0.005 < 0.015 03-Jan-22 10-Jan-22 301 0.043 +/- 0.005 < 0.019 10-Jan-22 17-Jan-22 290 0.025 +/- 0.004 < 0.018 17-Jan-22 24-Jan-22 306 0.026 +/- 0.004 < 0.015 24-Jan-22 31-Jan-22 310 0.021 +/- 0.004 < 0.016 31-Jan-22 08-Feb-22 356 0.028 +/- 0.004 < 0.013 31-Jan-22 08-Feb-22 356 0.027 +/- 0.004 Duplicate 08-Feb-22 14-Feb-22 260 0.023 +/- 0.005 < 0.031 14-Feb-22 21-Feb-22 303 0.029 +/- 0.005 < 0.008 21-Feb-22 28-Feb-22 311 0.039 +/- 0.005 < 0.010 21-Feb-22 28-Feb-22 311 0.038 +/- 0.005 Duplicate 28-Feb-22 07-Mar-22 298 0.034 +/- 0.005 < 0.017 07-Mar-22 14-Mar-22 300 0.023 +/- 0.004 < 0.007 14-Mar-22 21-Mar-22 290 0.023 +/- 0.004 < 0.014 21-Mar-22 28-Mar-22 307 0.013 +/- 0.004 < 0.011 28-Mar-22 04-Apr-22 290 0.022 +/- 0.005 < 0.016 04-Apr-22 11-Apr-22 294 0.022 +/- 0.004 < 0.011 11-Apr-22 18-Apr-22 306 0.028 +/- 0.004 < 0.030 18-Apr-22 25-Apr-22 293 0.021 +/- 0.004 < 0.011 25-Apr-22 02-May-22 289 0.024 +/- 0.004 < 0.023 02-May-22 09-May-22 292 0.013 +/- 0.004 < 0.025 09-May-22 16-May-22 297 0.028 +/- 0.005 < 0.012 09-May-22 16-May-22 297 0.023 +/- 0.005 Duplicate 16-May-22 23-May-22 303 0.020 +/- 0.004 < 0.012 23-May-22 31-May-22 333 0.019 +/- 0.004 < 0.013 31-May-22 06-Jun-22 247 0.015 +/- 0.005 < 0.018 06-Jun-22 13-Jun-22 295 0.020 +/- 0.004 < 0.011 13-Jun-22 20-Jun-22 298 0.028 +/- 0.005 < 0.012 20-Jun-22 27-Jun-22 297 0.029 +/- 0.005 < 0.016 27-Jun-22 05-Jul-22 332 0.029 +/- 0.004 < 0.014 27-Jun-22 05-Jul-22 332 0.026 +/- 0.004 Duplicate 05-Jul-22 11-Jul-22 256 0.024 +/- 0.005 < 0.012 11-Jul-22 19-Jul-22 309 0.026 +/- 0.004 < 0.021 19-Jul-22 25-Jul-22 259 0.031 +/- 0.005 < 0.013 25-Jul-22 01-Aug-22 299 0.026 +/- 0.004 < 0.012 25-Jul-22 01-Aug-22 299 0.026 +/- 0.004 01-Aug-22 08-Aug-22 300 0.021 +/- 0.004 < 0.008 01-Aug-22 08-Aug-22 300 0.021 +/- 0.004 01-Aug-22 08-Aug-22 300 0.023 +/- 0.004 Duplicate 01-Aug-22 08-Aug-22 300 0.023 +/- 0.004 Duplicate 08-Aug-22 15-Aug-22 304 0.032 +/- 0.005 < 0.009 2022 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-Aug-22 15-Aug-22 304 0.032 +/- 0.005 15-Aug-22 22-Aug-22 298 0.034 +/- 0.005 < 0.018 15-Aug-22 22-Aug-22 298 0.034 +/- 0.005 22-Aug-22 29-Aug-22 298 0.037 +/- 0.005 < 0.017 22-Aug-22 29-Aug-22 298 0.037 +/- 0.005 29-Aug-22 06-Sep-22 344 0.026 +/- 0.004 < 0.021 29-Aug-22 06-Sep-22 344 0.026 +/- 0.004 06-Sep-22 12-Sep-22 243 0.034 +/- 0.006 < 0.016 06-Sep-22 12-Sep-22 243 0.034 +/- 0.006 12-Sep-22 19-Sep-22 305 0.036 +/- 0.005 < 0.025 12-Sep-22 19-Sep-22 305 0.036 +/- 0.005 19-Sep-22 26-Sep-22 312 0.026 +/- 0.005 < 0.009 19-Sep-22 26-Sep-22 312 0.026 +/- 0.005 26-Sep-22 03-Oct-22 283 0.031 +/- 0.005 < 0.020 03-Oct-22 10-Oct-22 304 0.036 +/- 0.005 < 0.013 10-Oct-22 17-Oct-22 295 0.031 +/- 0.005 < 0.019 17-Oct-22 24-Oct-22 293 0.028 +/- 0.005 < 0.009 24-Oct-22 31-Oct-22 304 0.027 +/- 0.005 < 0.006 31-Oct-22 07-Nov-22 304 0.036 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 304 0.036 +/- 0.005 < 0.012 07-Nov-22 14-Nov-22 297 0.016 +/- 0.004 < 0.015 14-Nov-22 21-Nov-22 300 0.035 +/- 0.005 < 0.019 14-Nov-22 21-Nov-22 300 0.037 +/- 0.005 Duplicate 21-Nov-22 28-Nov-22 290 0.047 +/- 0.006 < 0.018 28-Nov-22 05-Dec-22 301 0.035 +/- 0.005 < 0.028 05-Dec-22 12-Dec-22 306 0.061 +/- 0.006 < 0.015 05-Dec-22 12-Dec-22 306 0.062 +/- 0.006 Duplicate 12-Dec-22 19-Dec-22 301 0.019 +/- 0.004 < 0.029 19-Dec-22 27-Dec-22 355 0.040 +/- 0.005 < 0.021 19-Dec-22 27-Dec-22 355 0.039 +/- 0.005 Duplicate 27-Dec-22 03-Jan-23 281 0.038 +/- 0.005 < 0.025 2022 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) 27-Dec-21 03-Jan-22 307 0.049 +/- 0.005 < 0.015 03-Jan-22 10-Jan-22 305 0.044 +/- 0.005 < 0.019 10-Jan-22 17-Jan-22 298 0.025 +/- 0.004 < 0.017 17-Jan-22 24-Jan-22 302 0.027 +/- 0.004 < 0.015 24-Jan-22 31-Jan-22 311 0.024 +/- 0.004 < 0.016 31-Jan-22 08-Feb-22 350 0.030 +/- 0.004 < 0.013 08-Feb-22 14-Feb-22 259 0.027 +/- 0.005 < 0.031 14-Feb-22 21-Feb-22 302 0.028 +/- 0.005 < 0.008 21-Feb-22 28-Feb-22 314 0.041 +/- 0.005 < 0.010 28-Feb-22 07-Mar-22 296 0.040 +/- 0.005 < 0.017 07-Mar-22 14-Mar-22 299 0.025 +/- 0.004 < 0.007 14-Mar-22 21-Mar-22 293 0.021 +/- 0.004 < 0.014 21-Mar-22 28-Mar-22 299 0.010 +/- 0.004 < 0.011 28-Mar-22 04-Apr-22 296 0.023 +/- 0.005 < 0.016 04-Apr-22 11-Apr-22 292 0.020 +/- 0.004 < 0.011 11-Apr-22 18-Apr-22 292 0.022 +/- 0.004 < 0.031 18-Apr-22 25-Apr-22 290 0.024 +/- 0.004 < 0.011 25-Apr-22 02-May-22 291 0.028 +/- 0.004 < 0.023 02-May-22 09-May-22 293 0.013 +/- 0.004 < 0.025 09-May-22 16-May-22 296 0.025 +/- 0.005 < 0.012 16-May-22 23-May-22 250 0.021 +/- 0.005 < 0.015 23-May-22 31-May-22 332 0.018 +/- 0.004 < 0.013 31-May-22 06-Jun-22 252 0.021 +/- 0.005 < 0.018 06-Jun-22 13-Jun-22 297 0.020 +/- 0.004 < 0.010 13-Jun-22 20-Jun-22 302 0.034 +/- 0.005 < 0.012 20-Jun-22 27-Jun-22 293 0.029 +/- 0.005 < 0.016 27-Jun-22 05-Jul-22 329 0.029 +/- 0.004 < 0.014 05-Jul-22 11-Jul-22 252 0.018 +/- 0.005 < 0.013 11-Jul-22 19-Jul-22 334 0.032 +/- 0.004 < 0.019 19-Jul-22 25-Jul-22 251 0.030 +/- 0.005 < 0.014 25-Jul-22 01-Aug-22 292 0.030 +/- 0.004 < 0.012 25-Jul-22 01-Aug-22 292 0.030 +/- 0.004 01-Aug-22 08-Aug-22 300 0.022 +/- 0.004 < 0.008 01-Aug-22 08-Aug-22 300 0.022 +/- 0.004 08-Aug-22 15-Aug-22 303 0.028 +/- 0.005 < 0.009 08-Aug-22 15-Aug-22 303 0.028 +/- 0.005 15-Aug-22 22-Aug-22 298 0.038 +/- 0.005 < 0.018 15-Aug-22 22-Aug-22 298 0.038 +/- 0.005 15-Aug-22 22-Aug-22 298 0.033 +/- 0.005 Duplicate 15-Aug-22 22-Aug-22 298 0.033 +/- 0.005 Duplicate 22-Aug-22 29-Aug-22 294 0.034 +/- 0.005 < 0.017 2022 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) 22-Aug-22 29-Aug-22 294 0.034 +/- 0.005 29-Aug-22 06-Sep-22 338 0.024 +/- 0.004 < 0.022 29-Aug-22 06-Sep-22 338 0.024 +/- 0.004 06-Sep-22 12-Sep-22 250 0.041 +/- 0.006 < 0.015 06-Sep-22 12-Sep-22 250 0.041 +/- 0.006 12-Sep-22 19-Sep-22 299 0.039 +/- 0.005 < 0.026 12-Sep-22 19-Sep-22 299 0.039 +/- 0.005 19-Sep-22 26-Sep-22 300 0.029 +/- 0.005 < 0.009 19-Sep-22 26-Sep-22 300 0.029 +/- 0.005 26-Sep-22 03-Oct-22 303 0.026 +/- 0.004 < 0.019 03-Oct-22 10-Oct-22 298 0.050 +/- 0.005 < 0.013 10-Oct-22 17-Oct-22 307 0.034 +/- 0.005 < 0.018 10-Oct-22 17-Oct-22 307 0.032 +/- 0.005 Duplicate 17-Oct-22 24-Oct-22 290 0.027 +/- 0.005 < 0.009 24-Oct-22 31-Oct-22 301 0.028 +/- 0.005 < 0.006 31-Oct-22 07-Nov-22 305 0.038 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 305 0.038 +/- 0.005 < 0.012 07-Nov-22 14-Nov-22 298 0.015 +/- 0.004 < 0.015 14-Nov-22 21-Nov-22 310 0.033 +/- 0.005 < 0.018 21-Nov-22 28-Nov-22 293 0.044 +/- 0.005 < 0.018 28-Nov-22 05-Dec-22 295 0.035 +/- 0.005 < 0.028 05-Dec-22 12-Dec-22 299 0.053 +/- 0.006 < 0.016 12-Dec-22 19-Dec-22 301 0.024 +/- 0.005 < 0.029 19-Dec-22 27-Dec-22 355 0.042 +/- 0.005 < 0.021 27-Dec-22 03-Jan-23 286 0.029 +/- 0.005 < 0.025 2022 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) 27-Dec-21 03-Jan-22 308 0.055 +/- 0.006 < 0.015 03-Jan-22 10-Jan-22 303 0.043 +/- 0.005 < 0.019 10-Jan-22 17-Jan-22 253 0.025 +/- 0.005 < 0.020 17-Jan-22 24-Jan-22 309 0.025 +/- 0.004 < 0.015 24-Jan-22 31-Jan-22 312 0.020 +/- 0.004 < 0.016 31-Jan-22 08-Feb-22 352 0.030 +/- 0.004 < 0.013 08-Feb-22 14-Feb-22 261 0.025 +/- 0.005 < 0.031 14-Feb-22 21-Feb-22 303 0.029 +/- 0.005 < 0.008 21-Feb-22 28-Feb-22 315 0.044 +/- 0.005 < 0.010 28-Feb-22 07-Mar-22 298 0.038 +/- 0.005 < 0.017 07-Mar-22 14-Mar-22 299 0.029 +/- 0.004 < 0.007 07-Mar-22 14-Mar-22 299 0.025 +/- 0.004 Duplicate 14-Mar-22 21-Mar-22 299 0.024 +/- 0.004 < 0.014 21-Mar-22 28-Mar-22 303 0.015 +/- 0.004 < 0.011 28-Mar-22 04-Apr-22 290 0.023 +/- 0.005 < 0.016 04-Apr-22 11-Apr-22 298 0.019 +/- 0.004 < 0.011 11-Apr-22 18-Apr-22 302 0.024 +/- 0.004 < 0.030 18-Apr-22 25-Apr-22 292 0.024 +/- 0.004 < 0.011 25-Apr-22 02-May-22 291 0.025 +/- 0.004 < 0.023 02-May-22 09-May-22 295 0.015 +/- 0.004 < 0.025 09-May-22 16-May-22 301 0.028 +/- 0.005 < 0.012 16-May-22 23-May-22 302 0.025 +/- 0.004 < 0.013 23-May-22 31-May-22 331 0.021 +/- 0.004 < 0.013 31-May-22 06-Jun-22 252 0.017 +/- 0.005 < 0.018 06-Jun-22 13-Jun-22 296 0.020 +/- 0.004 < 0.010 13-Jun-22 20-Jun-22 298 0.031 +/- 0.005 < 0.012 13-Jun-22 20-Jun-22 298 0.031 +/- 0.005 Duplicate 20-Jun-22 27-Jun-22 294 0.027 +/- 0.005 < 0.016 20-Jun-22 27-Jun-22 294 0.027 +/- 0.005 Duplicate 27-Jun-22 05-Jul-22 333 0.028 +/- 0.004 < 0.014 05-Jul-22 11-Jul-22 252 0.024 +/- 0.005 < 0.013 05-Jul-22 11-Jul-22 252 0.027 +/- 0.005 Duplicate 11-Jul-22 19-Jul-22 341 0.028 +/- 0.004 < 0.019 11-Jul-22 19-Jul-22 341 0.034 +/- 0.004 Duplicate 19-Jul-22 25-Jul-22 256 0.034 +/- 0.005 < 0.013 25-Jul-22 01-Aug-22 289 0.026 +/- 0.004 < 0.012 25-Jul-22 01-Aug-22 289 0.026 +/- 0.004 01-Aug-22 08-Aug-22 298 0.021 +/- 0.004 < 0.008 01-Aug-22 08-Aug-22 298 0.021 +/- 0.004 08-Aug-22 15-Aug-22 299 0.031 +/- 0.005 < 0.009 08-Aug-22 15-Aug-22 299 0.031 +/- 0.005 2022 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) 15-Aug-22 22-Aug-22 292 0.036 +/- 0.005 < 0.018 15-Aug-22 22-Aug-22 292 0.036 +/- 0.005 22-Aug-22 29-Aug-22 294 0.037 +/- 0.005 < 0.017 22-Aug-22 29-Aug-22 294 0.037 +/- 0.005 29-Aug-22 06-Sep-22 339 0.025 +/- 0.004 < 0.022 29-Aug-22 06-Sep-22 339 0.025 +/- 0.004 06-Sep-22 12-Sep-22 285 0.036 +/- 0.005 < 0.013 06-Sep-22 12-Sep-22 285 0.036 +/- 0.005 12-Sep-22 19-Sep-22 292 0.045 +/- 0.005 < 0.026 12-Sep-22 19-Sep-22 292 0.045 +/- 0.005 19-Sep-22 26-Sep-22 299 0.026 +/- 0.005 < 0.009 19-Sep-22 26-Sep-22 299 0.026 +/- 0.005 26-Sep-22 03-Oct-22 300 0.026 +/- 0.004 < 0.019 03-Oct-22 10-Oct-22 303 0.041 +/- 0.005 < 0.013 10-Oct-22 17-Oct-22 301 0.033 +/- 0.005 < 0.019 17-Oct-22 24-Oct-22 293 0.032 +/- 0.005 < 0.009 24-Oct-22 31-Oct-22 303 0.027 +/- 0.005 < 0.006 31-Oct-22 07-Nov-22 309 0.041 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 309 0.041 +/- 0.005 < 0.011 07-Nov-22 14-Nov-22 304 0.019 +/- 0.004 < 0.015 14-Nov-22 21-Nov-22 305 0.035 +/- 0.005 < 0.018 21-Nov-22 28-Nov-22 292 0.047 +/- 0.006 < 0.018 28-Nov-22 05-Dec-22 300 0.034 +/- 0.005 < 0.028 05-Dec-22 12-Dec-22 306 0.063 +/- 0.006 < 0.015 12-Dec-22 19-Dec-22 295 0.019 +/- 0.004 < 0.030 19-Dec-22 27-Dec-22 361 0.042 +/- 0.005 < 0.021 27-Dec-22 03-Jan-23 287 0.034 +/- 0.005 < 0.025 2022 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) 27-Dec-21 03-Jan-22 305 0.057 +/- 0.006 < 0.015 03-Jan-22 10-Jan-22 301 0.049 +/- 0.005 < 0.019 10-Jan-22 17-Jan-22 304 0.029 +/- 0.004 < 0.017 17-Jan-22 24-Jan-22 309 0.026 +/- 0.004 < 0.015 17-Jan-22 24-Jan-22 309 0.026 +/- 0.004 Duplicate 24-Jan-22 31-Jan-22 316 0.027 +/- 0.004 < 0.016 24-Jan-22 31-Jan-22 316 0.024 +/- 0.004 Duplicate 31-Jan-22 08-Feb-22 353 0.032 +/- 0.004 < 0.013 08-Feb-22 14-Feb-22 261 0.022 +/- 0.005 < 0.031 14-Feb-22 21-Feb-22 304 0.034 +/- 0.005 < 0.008 21-Feb-22 28-Feb-22 315 0.047 +/- 0.005 < 0.010 28-Feb-22 07-Mar-22 296 0.039 +/- 0.005 < 0.017 07-Mar-22 14-Mar-22 294 0.024 +/- 0.004 < 0.007 14-Mar-22 21-Mar-22 307 0.021 +/- 0.004 < 0.013 14-Mar-22 21-Mar-22 307 0.024 +/- 0.004 Duplicate 21-Mar-22 28-Mar-22 306 0.014 +/- 0.004 < 0.011 28-Mar-22 04-Apr-22 298 0.020 +/- 0.004 < 0.016 04-Apr-22 11-Apr-22 299 0.020 +/- 0.004 < 0.011 11-Apr-22 18-Apr-22 303 0.026 +/- 0.004 < 0.030 18-Apr-22 25-Apr-22 296 0.024 +/- 0.004 < 0.011 18-Apr-22 25-Apr-22 296 0.020 +/- 0.004 Duplicate 25-Apr-22 02-May-22 296 0.027 +/- 0.004 < 0.023 02-May-22 09-May-22 295 0.015 +/- 0.004 < 0.025 09-May-22 16-May-22 300 0.021 +/- 0.005 < 0.012 16-May-22 23-May-22 300 0.021 +/- 0.004 < 0.013 23-May-22 31-May-22 333 0.015 +/- 0.004 < 0.013 31-May-22 06-Jun-22 254 0.020 +/- 0.005 < 0.018 06-Jun-22 13-Jun-22 299 0.023 +/- 0.004 < 0.010 06-Jun-22 13-Jun-22 299 0.023 +/- 0.004 Duplicate 13-Jun-22 20-Jun-22 302 0.030 +/- 0.005 < 0.012 20-Jun-22 27-Jun-22 298 0.028 +/- 0.005 < 0.016 27-Jun-22 05-Jul-22 338 0.027 +/- 0.004 < 0.014 05-Jul-22 11-Jul-22 257 0.022 +/- 0.005 < 0.012 11-Jul-22 19-Jul-22 346 0.033 +/- 0.004 < 0.019 19-Jul-22 25-Jul-22 258 0.037 +/- 0.005 < 0.013 25-Jul-22 01-Aug-22 296 0.029 +/- 0.004 < 0.012 25-Jul-22 01-Aug-22 296 0.029 +/- 0.004 01-Aug-22 08-Aug-22 299 0.021 +/- 0.004 < 0.009 01-Aug-22 08-Aug-22 299 0.021 +/- 0.004 08-Aug-22 15-Aug-22 302 0.029 +/- 0.005 < 0.009 08-Aug-22 15-Aug-22 302 0.029 +/- 0.005 2022 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) 15-Aug-22 22-Aug-22 299 0.037 +/- 0.005 < 0.018 15-Aug-22 22-Aug-22 299 0.037 +/- 0.005 22-Aug-22 29-Aug-22 300 0.036 +/- 0.005 < 0.017 22-Aug-22 29-Aug-22 300 0.036 +/- 0.005 29-Aug-22 06-Sep-22 344 0.025 +/- 0.004 < 0.021 29-Aug-22 06-Sep-22 344 0.025 +/- 0.004 06-Sep-22 12-Sep-22 259 0.040 +/- 0.005 < 0.015 06-Sep-22 12-Sep-22 259 0.040 +/- 0.005 12-Sep-22 19-Sep-22 298 0.038 +/- 0.005 < 0.026 12-Sep-22 19-Sep-22 298 0.038 +/- 0.005 19-Sep-22 26-Sep-22 301 0.028 +/- 0.005 < 0.009 19-Sep-22 26-Sep-22 301 0.028 +/- 0.005 26-Sep-22 03-Oct-22 300 0.024 +/- 0.004 < 0.019 03-Oct-22 10-Oct-22 300 0.037 +/- 0.005 < 0.013 03-Oct-22 10-Oct-22 300 0.040 +/- 0.005 Duplicate 10-Oct-22 17-Oct-22 303 0.030 +/- 0.005 < 0.019 17-Oct-22 24-Oct-22 292 0.033 +/- 0.005 < 0.009 24-Oct-22 31-Oct-22 310 0.028 +/- 0.005 < 0.006 31-Oct-22 07-Nov-22 306 0.039 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 306 0.039 +/- 0.005 < 0.012 07-Nov-22 14-Nov-22 301 0.018 +/- 0.004 < 0.015 14-Nov-22 21-Nov-22 303 0.035 +/- 0.005 < 0.019 21-Nov-22 28-Nov-22 299 0.047 +/- 0.005 < 0.017 28-Nov-22 05-Dec-22 308 0.037 +/- 0.005 < 0.027 05-Dec-22 12-Dec-22 303 0.056 +/- 0.006 < 0.015 12-Dec-22 19-Dec-22 306 0.021 +/- 0.004 < 0.029 19-Dec-22 27-Dec-22 352 0.037 +/- 0.005 < 0.021 27-Dec-22 03-Jan-23 295 0.036 +/- 0.005 < 0.024 2022 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) 27-Dec-21 03-Jan-22 297 0.063 +/- 0.006 < 0.015 03-Jan-22 10-Jan-22 302 0.047 +/- 0.005 < 0.019 10-Jan-22 17-Jan-22 300 0.033 +/- 0.005 < 0.017 17-Jan-22 24-Jan-22 313 0.027 +/- 0.004 < 0.015 24-Jan-22 31-Jan-22 312 0.022 +/- 0.004 < 0.016 31-Jan-22 08-Feb-22 354 0.032 +/- 0.004 < 0.013 08-Feb-22 14-Feb-22 261 0.023 +/- 0.005 < 0.031 14-Feb-22 21-Feb-22 300 0.029 +/- 0.005 < 0.008 21-Feb-22 28-Feb-22 315 0.042 +/- 0.005 < 0.010 28-Feb-22 07-Mar-22 296 0.041 +/- 0.005 < 0.017 28-Feb-22 07-Mar-22 296 0.038 +/- 0.005 Duplicate 07-Mar-22 14-Mar-22 301 0.023 +/- 0.004 < 0.007 14-Mar-22 21-Mar-22 311 0.019 +/- 0.004 < 0.013 21-Mar-22 28-Mar-22 309 0.014 +/- 0.004 < 0.011 28-Mar-22 04-Apr-22 314 0.021 +/- 0.004 < 0.015 04-Apr-22 11-Apr-22 313 0.015 +/- 0.004 < 0.010 11-Apr-22 18-Apr-22 298 0.022 +/- 0.004 < 0.031 18-Apr-22 25-Apr-22 295 0.019 +/- 0.004 < 0.011 25-Apr-22 02-May-22 298 0.023 +/- 0.004 < 0.022 02-May-22 09-May-22 285 0.013 +/- 0.004 < 0.025 09-May-22 16-May-22 294 0.023 +/- 0.005 < 0.012 16-May-22 23-May-22 308 0.020 +/- 0.004 < 0.012 23-May-22 31-May-22 335 0.019 +/- 0.004 < 0.013 31-May-22 06-Jun-22 255 0.016 +/- 0.005 < 0.018 06-Jun-22 13-Jun-22 302 0.021 +/- 0.004 < 0.010 13-Jun-22 20-Jun-22 291 0.028 +/- 0.005 < 0.012 20-Jun-22 27-Jun-22 309 0.027 +/- 0.004 < 0.015 27-Jun-22 05-Jul-22 212 0.026 +/- 0.006 < 0.022 05-Jul-22 11-Jul-22 253 0.021 +/- 0.005 < 0.012 11-Jul-22 19-Jul-22 313 0.028 +/- 0.004 < 0.021 19-Jul-22 25-Jul-22 257 0.032 +/- 0.005 < 0.013 25-Jul-22 01-Aug-22 293 0.027 +/- 0.004 < 0.012 25-Jul-22 01-Aug-22 293 0.027 +/- 0.004 01-Aug-22 08-Aug-22 313 0.020 +/- 0.004 < 0.008 01-Aug-22 08-Aug-22 313 0.020 +/- 0.004 08-Aug-22 15-Aug-22 287 0.029 +/- 0.005 < 0.009 08-Aug-22 15-Aug-22 287 0.029 +/- 0.005 15-Aug-22 22-Aug-22 313 0.031 +/- 0.004 < 0.017 15-Aug-22 22-Aug-22 313 0.031 +/- 0.004 22-Aug-22 29-Aug-22 315 0.034 +/- 0.005 < 0.016 22-Aug-22 29-Aug-22 315 0.034 +/- 0.005 2022 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) 29-Aug-22 06-Sep-22 350 0.025 +/- 0.004 < 0.021 29-Aug-22 06-Sep-22 350 0.025 +/- 0.004 06-Sep-22 12-Sep-22 256 0.042 +/- 0.006 < 0.015 06-Sep-22 12-Sep-22 256 0.042 +/- 0.006 12-Sep-22 19-Sep-22 301 0.039 +/- 0.005 < 0.025 12-Sep-22 19-Sep-22 301 0.039 +/- 0.005 19-Sep-22 26-Sep-22 305 0.029 +/- 0.005 < 0.009 19-Sep-22 26-Sep-22 305 0.029 +/- 0.005 26-Sep-22 03-Oct-22 300 0.028 +/- 0.005 < 0.019 03-Oct-22 10-Oct-22 302 0.042 +/- 0.005 < 0.013 10-Oct-22 17-Oct-22 300 0.033 +/- 0.005 < 0.019 17-Oct-22 24-Oct-22 297 0.030 +/- 0.005 < 0.009 24-Oct-22 31-Oct-22 312 0.034 +/- 0.005 < 0.006 31-Oct-22 07-Nov-22 303 0.040 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 303 0.040 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 303 0.040 +/- 0.005 Duplicate 31-Oct-22 07-Nov-22 303 0.040 +/- 0.005 Duplicate 07-Nov-22 14-Nov-22 297 0.020 +/- 0.005 < 0.015 07-Nov-22 14-Nov-22 297 0.017 +/- 0.004 Duplicate 14-Nov-22 21-Nov-22 308 0.030 +/- 0.005 < 0.018 21-Nov-22 28-Nov-22 299 0.050 +/- 0.006 < 0.017 28-Nov-22 05-Dec-22 309 0.034 +/- 0.005 < 0.027 28-Nov-22 05-Dec-22 309 0.033 +/- 0.005 Duplicate 05-Dec-22 12-Dec-22 303 0.063 +/- 0.006 < 0.015 12-Dec-22 19-Dec-22 308 0.022 +/- 0.004 < 0.029 19-Dec-22 27-Dec-22 349 0.043 +/- 0.005 < 0.021 27-Dec-22 03-Jan-23 293 0.036 +/- 0.005 < 0.024 2022 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) 27-Dec-21 03-Jan-22 310 0.053 +/- 0.005 < 0.015 03-Jan-22 10-Jan-22 299 0.046 +/- 0.005 < 0.019 10-Jan-22 17-Jan-22 293 0.029 +/- 0.004 < 0.017 17-Jan-22 24-Jan-22 313 0.028 +/- 0.004 < 0.015 24-Jan-22 31-Jan-22 318 0.022 +/- 0.004 < 0.016 31-Jan-22 08-Feb-22 350 0.035 +/- 0.004 < 0.013 08-Feb-22 14-Feb-22 264 0.022 +/- 0.005 < 0.030 14-Feb-22 21-Feb-22 299 0.030 +/- 0.005 < 0.008 21-Feb-22 28-Feb-22 322 0.040 +/- 0.005 < 0.010 28-Feb-22 07-Mar-22 302 0.043 +/- 0.005 < 0.017 07-Mar-22 14-Mar-22 294 0.025 +/- 0.004 < 0.007 14-Mar-22 21-Mar-22 301 0.024 +/- 0.004 < 0.013 21-Mar-22 28-Mar-22 310 0.015 +/- 0.004 < 0.011 28-Mar-22 04-Apr-22 299 0.024 +/- 0.005 < 0.016 28-Mar-22 04-Apr-22 299 0.021 +/- 0.004 Duplicate 04-Apr-22 11-Apr-22 302 0.019 +/- 0.004 < 0.011 11-Apr-22 18-Apr-22 308 0.024 +/- 0.004 < 0.029 18-Apr-22 25-Apr-22 293 0.024 +/- 0.004 < 0.011 25-Apr-22 02-May-22 297 0.024 +/- 0.004 < 0.023 02-May-22 09-May-22 296 0.015 +/- 0.004 < 0.024 09-May-22 16-May-22 307 0.023 +/- 0.005 < 0.011 16-May-22 23-May-22 313 0.020 +/- 0.004 < 0.012 16-May-22 23-May-22 313 0.020 +/- 0.004 Duplicate 23-May-22 31-May-22 340 0.016 +/- 0.004 < 0.012 31-May-22 06-Jun-22 254 0.019 +/- 0.005 < 0.018 06-Jun-22 13-Jun-22 306 0.023 +/- 0.004 < 0.010 13-Jun-22 20-Jun-22 304 0.034 +/- 0.005 < 0.012 20-Jun-22 27-Jun-22 298 0.028 +/- 0.005 < 0.016 27-Jun-22 05-Jul-22 341 0.026 +/- 0.004 < 0.014 05-Jul-22 11-Jul-22 257 0.022 +/- 0.005 < 0.012 11-Jul-22 19-Jul-22 350 0.031 +/- 0.004 < 0.019 19-Jul-22 25-Jul-22 262 0.030 +/- 0.005 < 0.013 25-Jul-22 01-Aug-22 292 0.025 +/- 0.004 < 0.012 25-Jul-22 01-Aug-22 292 0.025 +/- 0.004 01-Aug-22 08-Aug-22 299 0.018 +/- 0.004 < 0.009 01-Aug-22 08-Aug-22 299 0.018 +/- 0.004 08-Aug-22 15-Aug-22 303 0.033 +/- 0.005 < 0.009 08-Aug-22 15-Aug-22 303 0.033 +/- 0.005 15-Aug-22 22-Aug-22 303 0.037 +/- 0.005 < 0.018 15-Aug-22 22-Aug-22 303 0.037 +/- 0.005 22-Aug-22 29-Aug-22 294 0.032 +/- 0.005 < 0.017 2022 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) 22-Aug-22 29-Aug-22 294 0.032 +/- 0.005 22-Aug-22 29-Aug-22 294 0.034 +/- 0.005 Duplicate 22-Aug-22 29-Aug-22 294 0.034 +/- 0.005 Duplicate 29-Aug-22 06-Sep-22 350 0.026 +/- 0.004 < 0.021 29-Aug-22 06-Sep-22 350 0.026 +/- 0.004 06-Sep-22 12-Sep-22 228 0.038 +/- 0.006 < 0.017 06-Sep-22 12-Sep-22 228 0.038 +/- 0.006 12-Sep-22 19-Sep-22 281 0.039 +/- 0.005 < 0.027 12-Sep-22 19-Sep-22 281 0.039 +/- 0.005 19-Sep-22 26-Sep-22 300 0.028 +/- 0.005 < 0.009 19-Sep-22 26-Sep-22 300 0.028 +/- 0.005 26-Sep-22 03-Oct-22 296 0.026 +/- 0.005 < 0.019 03-Oct-22 10-Oct-22 300 0.040 +/- 0.005 < 0.013 10-Oct-22 17-Oct-22 300 0.035 +/- 0.005 < 0.019 17-Oct-22 24-Oct-22 290 0.033 +/- 0.005 < 0.009 17-Oct-22 24-Oct-22 290 0.032 +/- 0.005 Duplicate 24-Oct-22 31-Oct-22 301 0.028 +/- 0.005 < 0.006 24-Oct-22 31-Oct-22 301 0.032 +/- 0.005 Duplicate 31-Oct-22 07-Nov-22 303 0.035 +/- 0.005 < 0.012 31-Oct-22 07-Nov-22 303 0.035 +/- 0.005 < 0.012 07-Nov-22 14-Nov-22 300 0.016 +/- 0.004 < 0.015 14-Nov-22 21-Nov-22 312 0.030 +/- 0.005 < 0.018 21-Nov-22 28-Nov-22 295 0.045 +/- 0.005 < 0.017 28-Nov-22 05-Dec-22 300 0.033 +/- 0.005 < 0.028 05-Dec-22 12-Dec-22 303 0.060 +/- 0.006 < 0.015 12-Dec-22 19-Dec-22 301 0.019 +/- 0.004 < 0.029 19-Dec-22 27-Dec-22 358 0.035 +/- 0.004 < 0.021 27-Dec-22 03-Jan-23 283 0.041 +/- 0.005 < 0.025 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 12

Quarterly Air Particulates - Gamma Location: 002 28-Mar-22 Nuclide Concentration (pCi/m3)

BE-7 0.087 +/- 0.020 MN-54 < 0.001 CO-58 < 0.002 FE-59 < 0.004 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 27-Jun-22 Nuclide Concentration (pCi/m3)

BE-7 0.103 +/- 0.012 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 03-Oct-22 Nuclide Concentration (pCi/m3)

BE-7 0.095 +/- 0.013 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 02-Jan-23 Nuclide Concentration (pCi/m3)

BE-7 0.059 +/- 0.005 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 28-Mar-22 Nuclide Concentration (pCi/m3)

BE-7 0.115 +/- 0.023 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.005 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.003 CS-134 < 0.001 CS-137 < 0.001 27-Jun-22 Nuclide Concentration (pCi/m3)

BE-7 0.098 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.003 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Oct-22 Nuclide Concentration (pCi/m3)

BE-7 0.088 +/- 0.010 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 02-Jan-23 Nuclide Concentration (pCi/m3)

BE-7 0.061 +/- 0.004 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: 032 28-Mar-22 Nuclide Concentration (pCi/m3)

BE-7 0.087 +/- 0.019 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 27-Jun-22 Nuclide Concentration (pCi/m3)

BE-7 0.102 +/- 0.019 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.003 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 03-Oct-22 Nuclide Concentration (pCi/m3)

BE-7 0.086 +/- 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 02-Jan-23 Nuclide Concentration (pCi/m3)

BE-7 0.067 +/- 0.008 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: 037 28-Mar-22 Nuclide Concentration (pCi/m3)

BE-7 0.112 +/- 0.018 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.003 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 27-Jun-22 Nuclide Concentration (pCi/m3)

BE-7 0.120 +/- 0.020 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.003 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 03-Oct-22 Nuclide Concentration (pCi/m3)

BE-7 0.090 +/- 0.013 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 02-Jan-23 Nuclide Concentration (pCi/m3)

BE-7 0.070 +/- 0.013 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.002 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Quarterly Air Particulates - Gamma Location: 049 28-Mar-22 Nuclide Concentration (pCi/m3)

BE-7 0.113 +/- 0.021 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 27-Jun-22 Nuclide Concentration (pCi/m3)

BE-7 0.095 +/- 0.012 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 03-Oct-22 Nuclide Concentration (pCi/m3)

BE-7 0.097 +/- 0.014 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 02-Jan-23 Nuclide Concentration (pCi/m3)

BE-7 0.061 +/- 0.010 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

Quarterly Air Particulates - Gamma Location: 053 28-Mar-22 Nuclide Concentration (pCi/m3)

BE-7 0.109 +/- 0.020 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 27-Jun-22 Nuclide Concentration (pCi/m3)

BE-7 0.096 +/- 0.011 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 03-Oct-22 Nuclide Concentration (pCi/m3)

BE-7 0.094 +/- 0.014 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 02-Jan-23 Nuclide Concentration (pCi/m3)

BE-7 0.056 +/- 0.013 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.002 ZN-65 < 0.002 ZR-NB-95 < 0.001 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-22 SURFACE WATER MN-54 < 3.7 10-Jan-22 SURFACE WATER CO-58 < 2.8 10-Jan-22 SURFACE WATER FE-59 < 3.8 10-Jan-22 SURFACE WATER CO-60 < 2.2 10-Jan-22 SURFACE WATER ZN-65 < 4.6 10-Jan-22 SURFACE WATER ZR-NB-95 < 4.4 10-Jan-22 SURFACE WATER I-131 < 5.9 10-Jan-22 SURFACE WATER CS-134 < 3.9 10-Jan-22 SURFACE WATER CS-137 < 4.5 10-Jan-22 SURFACE WATER BA-LA-140 < 2.9 10-Jan-22 SURFACE WATER H-3 < 155.0 15-Feb-22 SURFACE WATER MN-54 < 2.3 15-Feb-22 SURFACE WATER CO-58 < 2.9 15-Feb-22 SURFACE WATER FE-59 < 3.4 15-Feb-22 SURFACE WATER CO-60 < 2.1 15-Feb-22 SURFACE WATER ZN-65 < 5.4 15-Feb-22 SURFACE WATER ZR-NB-95 < 3.5 15-Feb-22 SURFACE WATER I-131 < 4.0 15-Feb-22 SURFACE WATER CS-134 < 4.1 15-Feb-22 SURFACE WATER CS-137 < 4.4 15-Feb-22 SURFACE WATER BA-LA-140 < 4.3 15-Feb-22 SURFACE WATER H-3 < 161.0 15-Feb-22 SURFACE WATER FE-55 < 146.0 09-Mar-22 SURFACE WATER MN-54 < 2.3 09-Mar-22 SURFACE WATER CO-58 < 1.9 09-Mar-22 SURFACE WATER FE-59 < 2.2 09-Mar-22 SURFACE WATER CO-60 < 2.2 09-Mar-22 SURFACE WATER ZN-65 < 5.5 09-Mar-22 SURFACE WATER ZR-NB-95 < 4.0 09-Mar-22 SURFACE WATER I-131 < 6.6 09-Mar-22 SURFACE WATER CS-134 < 3.2 09-Mar-22 SURFACE WATER CS-137 < 2.7 09-Mar-22 SURFACE WATER BA-LA-140 < 1.8 09-Mar-22 SURFACE WATER H-3 < 177.0 26-Apr-22 SURFACE WATER MN-54 < 3.6 26-Apr-22 SURFACE WATER CO-58 < 3.0 26-Apr-22 SURFACE WATER FE-59 < 5.8 26-Apr-22 SURFACE WATER CO-60 < 1.5 2022 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 26-Apr-22 SURFACE WATER ZN-65 < 7.4 26-Apr-22 SURFACE WATER ZR-NB-95 < 4.9 26-Apr-22 SURFACE WATER I-131 < 7.3 26-Apr-22 SURFACE WATER CS-134 < 3.8 26-Apr-22 SURFACE WATER CS-137 < 3.9 26-Apr-22 SURFACE WATER BA-LA-140 < 4.7 26-Apr-22 SURFACE WATER H-3 < 165.0 10-May-22 SURFACE WATER MN-54 < 3.3 10-May-22 SURFACE WATER CO-58 < 3.1 10-May-22 SURFACE WATER FE-59 < 6.5 10-May-22 SURFACE WATER CO-60 < 2.1 10-May-22 SURFACE WATER ZN-65 < 5.8 10-May-22 SURFACE WATER ZR-NB-95 < 3.5 10-May-22 SURFACE WATER I-131 < 5.9 10-May-22 SURFACE WATER CS-134 < 3.3 10-May-22 SURFACE WATER CS-137 < 3.0 10-May-22 SURFACE WATER BA-LA-140 < 4.0 10-May-22 SURFACE WATER H-3 < 163.0 10-May-22 SURFACE WATER FE-55 < 142.0 14-Jun-22 SURFACE WATER MN-54 < 2.2 14-Jun-22 SURFACE WATER CO-58 < 2.4 14-Jun-22 SURFACE WATER FE-59 < 3.9 14-Jun-22 SURFACE WATER CO-60 < 1.9 14-Jun-22 SURFACE WATER ZN-65 < 3.1 14-Jun-22 SURFACE WATER ZR-NB-95 < 3.5 14-Jun-22 SURFACE WATER I-131 < 6.4 14-Jun-22 SURFACE WATER CS-134 < 3.7 14-Jun-22 SURFACE WATER CS-137 < 2.5 14-Jun-22 SURFACE WATER BA-LA-140 < 3.3 14-Jun-22 SURFACE WATER H-3 < 162.0 12-Jul-22 SURFACE WATER MN-54 < 4.2 12-Jul-22 SURFACE WATER CO-58 < 2.1 12-Jul-22 SURFACE WATER FE-59 < 5.9 12-Jul-22 SURFACE WATER CO-60 < 1.9 12-Jul-22 SURFACE WATER ZN-65 < 3.3 12-Jul-22 SURFACE WATER ZR-NB-95 < 2.4 12-Jul-22 SURFACE WATER I-131 < 4.6 12-Jul-22 SURFACE WATER CS-134 < 3.7 2022 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 12-Jul-22 SURFACE WATER CS-137 < 3.4 12-Jul-22 SURFACE WATER BA-LA-140 < 3.2 12-Jul-22 SURFACE WATER H-3 < 167.0 16-Aug-22 SURFACE WATER MN-54 < 3.3 16-Aug-22 SURFACE WATER CO-58 < 4.2 16-Aug-22 SURFACE WATER FE-59 < 9.4 16-Aug-22 SURFACE WATER CO-60 < 4.8 16-Aug-22 SURFACE WATER ZN-65 < 7.3 16-Aug-22 SURFACE WATER ZR-NB-95 < 4.7 16-Aug-22 SURFACE WATER I-131 < 3.7 16-Aug-22 SURFACE WATER CS-134 < 4.4 16-Aug-22 SURFACE WATER CS-137 < 4.9 16-Aug-22 SURFACE WATER BA-LA-140 < 3.2 16-Aug-22 SURFACE WATER H-3 < 163.0 16-Aug-22 SURFACE WATER FE-55 < 126.0 20-Sep-22 SURFACE WATER MN-54 < 3.9 20-Sep-22 SURFACE WATER CO-58 < 4.7 20-Sep-22 SURFACE WATER FE-59 < 4.3 20-Sep-22 SURFACE WATER CO-60 < 3.7 20-Sep-22 SURFACE WATER ZN-65 < 9.1 20-Sep-22 SURFACE WATER ZR-NB-95 < 4.6 20-Sep-22 SURFACE WATER I-131 < 7.2 20-Sep-22 SURFACE WATER CS-134 < 5.5 20-Sep-22 SURFACE WATER CS-137 < 6.5 20-Sep-22 SURFACE WATER BA-LA-140 < 1.9 20-Sep-22 SURFACE WATER H-3 < 162.0 11-Oct-22 SURFACE WATER MN-54 < 4.5 11-Oct-22 SURFACE WATER CO-58 < 5.6 11-Oct-22 SURFACE WATER FE-59 < 7.8 11-Oct-22 SURFACE WATER CO-60 < 3.0 11-Oct-22 SURFACE WATER ZN-65 < 10.2 11-Oct-22 SURFACE WATER ZR-NB-95 < 6.4 11-Oct-22 SURFACE WATER I-131 < 5.2 11-Oct-22 SURFACE WATER CS-134 < 6.1 11-Oct-22 SURFACE WATER CS-137 < 6.7 11-Oct-22 SURFACE WATER BA-LA-140 < 6.1 11-Oct-22 SURFACE WATER H-3 < 157.0 22-Nov-22 SURFACE WATER MN-54 < 2.7 2022 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 22-Nov-22 SURFACE WATER CO-58 < 3.1 22-Nov-22 SURFACE WATER FE-59 < 5.6 22-Nov-22 SURFACE WATER CO-60 < 3.0 22-Nov-22 SURFACE WATER ZN-65 < 3.7 22-Nov-22 SURFACE WATER ZR-NB-95 < 3.1 22-Nov-22 SURFACE WATER I-131 < 7.0 22-Nov-22 SURFACE WATER CS-134 < 4.0 22-Nov-22 SURFACE WATER CS-137 < 4.7 22-Nov-22 SURFACE WATER BA-LA-140 < 5.5 22-Nov-22 SURFACE WATER H-3 165 +/- 85.0 22-Nov-22 SURFACE WATER H-3 178 +/- 95.0 22-Nov-22 SURFACE WATER FE-55 < 145.0 14-Dec-22 SURFACE WATER MN-54 < 2.1 14-Dec-22 SURFACE WATER CO-58 < 2.7 14-Dec-22 SURFACE WATER FE-59 < 4.3 14-Dec-22 SURFACE WATER CO-60 < 2.2 14-Dec-22 SURFACE WATER ZN-65 < 5.8 14-Dec-22 SURFACE WATER ZR-NB-95 < 2.6 14-Dec-22 SURFACE WATER I-131 < 2.1 14-Dec-22 SURFACE WATER CS-134 < 2.5 14-Dec-22 SURFACE WATER CS-137 < 3.3 14-Dec-22 SURFACE WATER BA-LA-140 < 1.7 14-Dec-22 SURFACE WATER H-3 < 162.0 2022 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-22 SURFACE WATER MN-54 < 2.8 10-Jan-22 SURFACE WATER CO-58 < 3.4 10-Jan-22 SURFACE WATER FE-59 < 3.4 10-Jan-22 SURFACE WATER CO-60 < 3.4 10-Jan-22 SURFACE WATER ZN-65 < 5.2 10-Jan-22 SURFACE WATER ZR-NB-95 < 3.5 10-Jan-22 SURFACE WATER I-131 < 6.8 10-Jan-22 SURFACE WATER CS-134 < 4.7 10-Jan-22 SURFACE WATER CS-137 < 4.3 10-Jan-22 SURFACE WATER BA-LA-140 < 2.3 10-Jan-22 SURFACE WATER H-3 13,181 +/- 356.0 15-Feb-22 SURFACE WATER MN-54 < 3.9 15-Feb-22 SURFACE WATER CO-58 < 2.8 15-Feb-22 SURFACE WATER FE-59 < 7.2 15-Feb-22 SURFACE WATER CO-60 < 3.8 15-Feb-22 SURFACE WATER ZN-65 < 4.8 15-Feb-22 SURFACE WATER ZR-NB-95 < 2.6 15-Feb-22 SURFACE WATER I-131 < 5.6 15-Feb-22 SURFACE WATER CS-134 < 4.8 15-Feb-22 SURFACE WATER CS-137 < 3.2 15-Feb-22 SURFACE WATER BA-LA-140 < 2.8 15-Feb-22 SURFACE WATER H-3 12,956 +/- 353.0 15-Feb-22 SURFACE WATER FE-55 < 140.0 09-Mar-22 SURFACE WATER MN-54 < 4.5 09-Mar-22 SURFACE WATER CO-58 < 2.9 09-Mar-22 SURFACE WATER FE-59 < 6.8 09-Mar-22 SURFACE WATER CO-60 < 3.0 09-Mar-22 SURFACE WATER ZN-65 < 7.3 09-Mar-22 SURFACE WATER ZR-NB-95 < 3.9 09-Mar-22 SURFACE WATER I-131 < 6.6 09-Mar-22 SURFACE WATER CS-134 < 4.8 09-Mar-22 SURFACE WATER CS-137 < 3.2 09-Mar-22 SURFACE WATER BA-LA-140 < 4.0 09-Mar-22 SURFACE WATER H-3 14,553 +/- 382.0 26-Apr-22 SURFACE WATER MN-54 < 4.6 26-Apr-22 SURFACE WATER MN-54 < 2.2 Duplicate 26-Apr-22 SURFACE WATER CO-58 < 1.3 Duplicate 26-Apr-22 SURFACE WATER CO-58 < 3.6 2022 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 26-Apr-22 SURFACE WATER FE-59 < 3.7 Duplicate 26-Apr-22 SURFACE WATER FE-59 < 5.1 26-Apr-22 SURFACE WATER CO-60 < 3.6 26-Apr-22 SURFACE WATER CO-60 < 1.6 Duplicate 26-Apr-22 SURFACE WATER ZN-65 < 4.6 Duplicate 26-Apr-22 SURFACE WATER ZN-65 < 5.7 26-Apr-22 SURFACE WATER ZR-NB-95 < 3.1 Duplicate 26-Apr-22 SURFACE WATER ZR-NB-95 < 4.9 26-Apr-22 SURFACE WATER I-131 < 7.4 26-Apr-22 SURFACE WATER I-131 < 5.4 Duplicate 26-Apr-22 SURFACE WATER CS-134 < 2.6 Duplicate 26-Apr-22 SURFACE WATER CS-134 < 5.3 26-Apr-22 SURFACE WATER CS-137 < 2.7 26-Apr-22 SURFACE WATER CS-137 < 3.0 Duplicate 26-Apr-22 SURFACE WATER BA-LA-140 < 2.9 Duplicate 26-Apr-22 SURFACE WATER BA-LA-140 < 2.6 26-Apr-22 SURFACE WATER H-3 15,159 +/- 386.0 26-Apr-22 SURFACE WATER H-3 16,022 +/- 396.0 Duplicate 10-May-22 SURFACE WATER MN-54 < 3.3 10-May-22 SURFACE WATER CO-58 < 3.8 10-May-22 SURFACE WATER FE-59 < 12.6 10-May-22 SURFACE WATER CO-60 < 5.9 10-May-22 SURFACE WATER ZN-65 < 11.5 10-May-22 SURFACE WATER ZR-NB-95 < 4.7 10-May-22 SURFACE WATER I-131 < 9.4 10-May-22 SURFACE WATER CS-134 < 6.4 10-May-22 SURFACE WATER CS-137 < 4.1 10-May-22 SURFACE WATER BA-LA-140 < 10.8 10-May-22 SURFACE WATER H-3 16,488 +/- 400.0 10-May-22 SURFACE WATER FE-55 < 135.0 14-Jun-22 SURFACE WATER MN-54 < 2.6 14-Jun-22 SURFACE WATER CO-58 < 3.1 14-Jun-22 SURFACE WATER FE-59 < 6.4 14-Jun-22 SURFACE WATER CO-60 < 1.8 14-Jun-22 SURFACE WATER ZN-65 < 2.2 14-Jun-22 SURFACE WATER ZR-NB-95 < 3.5 14-Jun-22 SURFACE WATER I-131 < 8.1 14-Jun-22 SURFACE WATER CS-134 < 2.6 2022 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 14-Jun-22 SURFACE WATER CS-137 < 3.1 14-Jun-22 SURFACE WATER BA-LA-140 < 4.5 14-Jun-22 SURFACE WATER H-3 15,166 +/- 385.0 12-Jul-22 SURFACE WATER MN-54 < 7.4 12-Jul-22 SURFACE WATER CO-58 < 7.4 12-Jul-22 SURFACE WATER FE-59 < 11.1 12-Jul-22 SURFACE WATER CO-60 < 5.2 12-Jul-22 SURFACE WATER ZN-65 < 7.8 12-Jul-22 SURFACE WATER ZR-NB-95 < 8.2 12-Jul-22 SURFACE WATER I-131 < 10.0 12-Jul-22 SURFACE WATER CS-134 < 6.3 12-Jul-22 SURFACE WATER CS-137 < 5.9 12-Jul-22 SURFACE WATER BA-LA-140 < 10.1 12-Jul-22 SURFACE WATER H-3 14,972 +/- 384.0 16-Aug-22 SURFACE WATER MN-54 < 2.3 16-Aug-22 SURFACE WATER CO-58 < 1.2 16-Aug-22 SURFACE WATER FE-59 < 1.8 16-Aug-22 SURFACE WATER CO-60 < 1.8 16-Aug-22 SURFACE WATER ZN-65 < 1.7 16-Aug-22 SURFACE WATER ZR-NB-95 < 1.6 16-Aug-22 SURFACE WATER I-131 < 3.2 16-Aug-22 SURFACE WATER CS-134 < 2.3 16-Aug-22 SURFACE WATER CS-137 < 2.3 16-Aug-22 SURFACE WATER BA-LA-140 < 2.6 16-Aug-22 SURFACE WATER H-3 14,509 +/- 378.0 16-Aug-22 SURFACE WATER FE-55 < 123.0 20-Sep-22 SURFACE WATER MN-54 < 1.1 20-Sep-22 SURFACE WATER CO-58 < 1.0 20-Sep-22 SURFACE WATER FE-59 < 1.2 20-Sep-22 SURFACE WATER CO-60 < 0.9 20-Sep-22 SURFACE WATER ZN-65 < 1.8 20-Sep-22 SURFACE WATER ZR-NB-95 < 1.1 20-Sep-22 SURFACE WATER I-131 < 1.3 20-Sep-22 SURFACE WATER CS-134 < 1.1 20-Sep-22 SURFACE WATER CS-137 < 1.4 20-Sep-22 SURFACE WATER BA-LA-140 < 1.4 20-Sep-22 SURFACE WATER H-3 13,975 +/- 371.0 11-Oct-22 SURFACE WATER MN-54 < 2.8 2022 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 11-Oct-22 SURFACE WATER CO-58 < 2.6 11-Oct-22 SURFACE WATER FE-59 < 4.3 11-Oct-22 SURFACE WATER CO-60 < 3.1 11-Oct-22 SURFACE WATER ZN-65 < 3.6 11-Oct-22 SURFACE WATER ZR-NB-95 < 2.6 11-Oct-22 SURFACE WATER I-131 < 3.5 11-Oct-22 SURFACE WATER CS-134 < 3.3 11-Oct-22 SURFACE WATER CS-137 < 3.2 11-Oct-22 SURFACE WATER BA-LA-140 < 2.0 11-Oct-22 SURFACE WATER H-3 14,140 +/- 372.0 22-Nov-22 SURFACE WATER MN-54 < 1.7 22-Nov-22 SURFACE WATER CO-58 < 4.0 22-Nov-22 SURFACE WATER FE-59 < 5.2 22-Nov-22 SURFACE WATER CO-60 < 2.0 22-Nov-22 SURFACE WATER ZN-65 < 4.6 22-Nov-22 SURFACE WATER ZR-NB-95 < 2.8 22-Nov-22 SURFACE WATER I-131 < 4.7 22-Nov-22 SURFACE WATER CS-134 < 2.9 22-Nov-22 SURFACE WATER CS-137 < 3.9 22-Nov-22 SURFACE WATER BA-LA-140 < 3.8 22-Nov-22 SURFACE WATER H-3 14,323 +/- 373.0 22-Nov-22 SURFACE WATER FE-55 < 140.0 14-Dec-22 SURFACE WATER MN-54 < 6.3 14-Dec-22 SURFACE WATER CO-58 < 3.5 14-Dec-22 SURFACE WATER FE-59 < 12.7 14-Dec-22 SURFACE WATER CO-60 < 4.8 14-Dec-22 SURFACE WATER ZN-65 < 4.3 14-Dec-22 SURFACE WATER ZR-NB-95 < 4.4 14-Dec-22 SURFACE WATER I-131 < 5.8 14-Dec-22 SURFACE WATER CS-134 < 6.0 14-Dec-22 SURFACE WATER CS-137 < 6.5 14-Dec-22 SURFACE WATER BA-LA-140 < 4.1 14-Dec-22 SURFACE WATER H-3 14,521 +/- 377.0 2022 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 15-Mar-22 OFFSITE GROUNDWATER MN-54 < 2.7 15-Mar-22 OFFSITE GROUNDWATER CO-58 < 4.2 15-Mar-22 OFFSITE GROUNDWATER FE-59 < 6.4 15-Mar-22 OFFSITE GROUNDWATER CO-60 < 2.2 15-Mar-22 OFFSITE GROUNDWATER ZN-65 < 8.2 15-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.7 15-Mar-22 OFFSITE GROUNDWATER I-131 < 0.281 15-Mar-22 OFFSITE GROUNDWATER CS-134 < 5.1 15-Mar-22 OFFSITE GROUNDWATER CS-137 < 5.1 15-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 3.7 15-Mar-22 OFFSITE GROUNDWATER H-3 < 177.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 3.1 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 2.4 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 3.8 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 2.2 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 2.1 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.3 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.496 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 3.2 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 3.3 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 3.2 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 5.5 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 3.2 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 6.2 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 4.1 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 4.0 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 7.2 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 5.2 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 5.6 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 4.5 12-Sep-22 OFFSITE GROUNDWATER H-3 < 157.0 12-Sep-22 OFFSITE GROUNDWATER H-3 190.0 +/- 85.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 1.7 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 2.1 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 7.0 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 1.9 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 2.3 2022 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 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.0 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.425 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 2.7 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 2.6 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 2.1 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 15-Mar-22 OFFSITE GROUNDWATER MN-54 < 2.8 15-Mar-22 OFFSITE GROUNDWATER CO-58 < 2.5 15-Mar-22 OFFSITE GROUNDWATER FE-59 < 3.5 15-Mar-22 OFFSITE GROUNDWATER CO-60 < 0.8 15-Mar-22 OFFSITE GROUNDWATER ZN-65 < 5.6 15-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.1 15-Mar-22 OFFSITE GROUNDWATER I-131 < 0.443 15-Mar-22 OFFSITE GROUNDWATER CS-134 < 3.0 15-Mar-22 OFFSITE GROUNDWATER CS-137 < 2.6 15-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 1.5 15-Mar-22 OFFSITE GROUNDWATER H-3 < 177.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 4.9 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 3.7 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 5.4 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 2.5 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 7.0 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.2 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.496 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 5.4 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 5.7 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 2.2 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 4.0 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 4.4 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 4.3 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 4.5 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 7.2 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.9 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 4.7 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 5.8 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 2.5 12-Sep-22 OFFSITE GROUNDWATER H-3 < 160.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 1.6 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 6.2 Duplicate 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 1.8 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 6.2 Duplicate 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 5.8 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 13.3 Duplicate 2022 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 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 1.8 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 3.1 Duplicate 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 4.8 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 14.8 Duplicate 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 9.6 Duplicate 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 1.8 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.328 Duplicate 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.42 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 8.1 Duplicate 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 2.5 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 2.5 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 4.8 Duplicate 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 11.8 Duplicate 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 1.7 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 Duplicate 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 15-Mar-22 OFFSITE GROUNDWATER MN-54 < 2.7 15-Mar-22 OFFSITE GROUNDWATER CO-58 < 3.1 15-Mar-22 OFFSITE GROUNDWATER FE-59 < 3.3 15-Mar-22 OFFSITE GROUNDWATER CO-60 < 2.1 15-Mar-22 OFFSITE GROUNDWATER ZN-65 < 3.9 15-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.9 15-Mar-22 OFFSITE GROUNDWATER I-131 < 0.44 15-Mar-22 OFFSITE GROUNDWATER CS-134 < 3.7 15-Mar-22 OFFSITE GROUNDWATER CS-137 < 3.7 15-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 2.5 15-Mar-22 OFFSITE GROUNDWATER H-3 < 177.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 7.7 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 5.9 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 7.4 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 5.0 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 14.1 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 6.7 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.257 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 6.8 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 7.7 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 5.7 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 1.9 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 1.4 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 3.9 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 1.4 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 6.7 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.7 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 2.8 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 2.9 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 2.3 12-Sep-22 OFFSITE GROUNDWATER H-3 < 160.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 3.5 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 3.9 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 3.8 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 2.5 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 6.2 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.6 2022 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 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.288 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 3.2 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 3.9 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 3.1 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 15-Mar-22 OFFSITE GROUNDWATER MN-54 < 2.7 15-Mar-22 OFFSITE GROUNDWATER CO-58 < 2.8 15-Mar-22 OFFSITE GROUNDWATER FE-59 < 6.0 15-Mar-22 OFFSITE GROUNDWATER CO-60 < 2.8 15-Mar-22 OFFSITE GROUNDWATER ZN-65 < 5.1 15-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 4.0 15-Mar-22 OFFSITE GROUNDWATER I-131 < 0.276 15-Mar-22 OFFSITE GROUNDWATER CS-134 < 3.5 15-Mar-22 OFFSITE GROUNDWATER CS-137 < 3.2 15-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 2.2 15-Mar-22 OFFSITE GROUNDWATER H-3 < 177.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 3.1 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 4.8 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 7.4 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 4.7 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 5.3 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 4.0 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.255 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 5.7 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 3.8 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 2.1 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 4.3 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 5.3 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 7.0 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 3.8 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 5.8 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 5.7 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 5.8 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 6.3 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 5.7 12-Sep-22 OFFSITE GROUNDWATER H-3 < 160.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 3.0 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 4.5 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 5.6 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 3.3 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 5.4 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.5 2022 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 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.422 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 4.3 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 2.2 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 3.8 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 15-Mar-22 OFFSITE GROUNDWATER MN-54 < 3.8 15-Mar-22 OFFSITE GROUNDWATER CO-58 < 3.6 15-Mar-22 OFFSITE GROUNDWATER FE-59 < 5.1 15-Mar-22 OFFSITE GROUNDWATER CO-60 < 4.8 15-Mar-22 OFFSITE GROUNDWATER ZN-65 < 7.5 15-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 6.4 15-Mar-22 OFFSITE GROUNDWATER I-131 < 0.255 15-Mar-22 OFFSITE GROUNDWATER CS-134 < 5.6 15-Mar-22 OFFSITE GROUNDWATER CS-137 < 3.7 15-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 4.0 15-Mar-22 OFFSITE GROUNDWATER H-3 < 177.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 3.5 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 2.3 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 7.1 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 1.9 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 4.9 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.3 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.296 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 3.0 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 3.7 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 2.3 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 3.9 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 5.3 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 9.5 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 4.6 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 13.0 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.8 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 6.2 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 3.2 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 2.7 12-Sep-22 OFFSITE GROUNDWATER H-3 < 160.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 4.2 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 3.4 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 6.7 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 2.8 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 5.7 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 4.6 2022 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 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.423 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 3.9 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 4.3 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 2.6 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 24-Mar-22 OFFSITE GROUNDWATER MN-54 < 4.0 24-Mar-22 OFFSITE GROUNDWATER CO-58 < 3.2 24-Mar-22 OFFSITE GROUNDWATER FE-59 < 6.4 24-Mar-22 OFFSITE GROUNDWATER CO-60 < 2.4 24-Mar-22 OFFSITE GROUNDWATER ZN-65 < 7.4 24-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 4.9 24-Mar-22 OFFSITE GROUNDWATER I-131 < 0.287 24-Mar-22 OFFSITE GROUNDWATER CS-134 < 3.7 24-Mar-22 OFFSITE GROUNDWATER CS-137 < 4.1 24-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 4.5 24-Mar-22 OFFSITE GROUNDWATER H-3 < 170.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 6.0 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 6.0 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 9.0 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 3.7 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 6.6 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 6.5 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.353 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 6.6 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 4.9 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 3.4 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 2.7 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 1.6 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 4.4 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 2.0 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 3.8 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.2 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 3.5 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 3.1 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 3.2 12-Sep-22 OFFSITE GROUNDWATER H-3 < 160.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 1.7 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 3.3 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 6.1 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 2.3 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 2.9 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.0 2022 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 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.259 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 2.8 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 3.2 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 1.3 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 15-Mar-22 OFFSITE GROUNDWATER MN-54 < 2.7 15-Mar-22 OFFSITE GROUNDWATER CO-58 < 2.4 15-Mar-22 OFFSITE GROUNDWATER FE-59 < 3.5 15-Mar-22 OFFSITE GROUNDWATER CO-60 < 1.2 15-Mar-22 OFFSITE GROUNDWATER ZN-65 < 6.0 15-Mar-22 OFFSITE GROUNDWATER ZR-NB-95 < 4.4 15-Mar-22 OFFSITE GROUNDWATER I-131 < 0.265 15-Mar-22 OFFSITE GROUNDWATER CS-134 < 3.4 15-Mar-22 OFFSITE GROUNDWATER CS-137 < 1.9 15-Mar-22 OFFSITE GROUNDWATER BA-LA-140 < 2.1 15-Mar-22 OFFSITE GROUNDWATER H-3 < 177.0 06-Jun-22 OFFSITE GROUNDWATER MN-54 < 6.4 06-Jun-22 OFFSITE GROUNDWATER CO-58 < 7.6 06-Jun-22 OFFSITE GROUNDWATER FE-59 < 11.6 06-Jun-22 OFFSITE GROUNDWATER CO-60 < 5.3 06-Jun-22 OFFSITE GROUNDWATER ZN-65 < 8.8 06-Jun-22 OFFSITE GROUNDWATER ZR-NB-95 < 6.1 06-Jun-22 OFFSITE GROUNDWATER I-131 < 0.311 06-Jun-22 OFFSITE GROUNDWATER CS-134 < 7.1 06-Jun-22 OFFSITE GROUNDWATER CS-137 < 4.3 06-Jun-22 OFFSITE GROUNDWATER BA-LA-140 < 9.0 06-Jun-22 OFFSITE GROUNDWATER H-3 < 162.0 12-Sep-22 OFFSITE GROUNDWATER MN-54 < 6.5 12-Sep-22 OFFSITE GROUNDWATER CO-58 < 4.2 12-Sep-22 OFFSITE GROUNDWATER FE-59 < 7.3 12-Sep-22 OFFSITE GROUNDWATER CO-60 < 4.0 12-Sep-22 OFFSITE GROUNDWATER ZN-65 < 10.7 12-Sep-22 OFFSITE GROUNDWATER ZR-NB-95 < 3.6 12-Sep-22 OFFSITE GROUNDWATER CS-134 < 5.2 12-Sep-22 OFFSITE GROUNDWATER CS-137 < 5.2 12-Sep-22 OFFSITE GROUNDWATER BA-LA-140 < 5.4 12-Sep-22 OFFSITE GROUNDWATER H-3 < 160.0 02-Nov-22 OFFSITE GROUNDWATER MN-54 < 2.5 02-Nov-22 OFFSITE GROUNDWATER CO-58 < 1.5 02-Nov-22 OFFSITE GROUNDWATER FE-59 < 4.4 02-Nov-22 OFFSITE GROUNDWATER CO-60 < 3.3 02-Nov-22 OFFSITE GROUNDWATER ZN-65 < 5.3 02-Nov-22 OFFSITE GROUNDWATER ZR-NB-95 < 2.7 2022 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 02-Nov-22 OFFSITE GROUNDWATER I-131 < 0.416 02-Nov-22 OFFSITE GROUNDWATER CS-134 < 3.0 02-Nov-22 OFFSITE GROUNDWATER CS-137 < 3.8 02-Nov-22 OFFSITE GROUNDWATER BA-LA-140 < 3.8 02-Nov-22 OFFSITE GROUNDWATER H-3 < 166.0 2022 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 05-Jan-22 MN-54 < 3.6 05-Jan-22 CO-58 < 2.9 05-Jan-22 FE-59 < 2.9 05-Jan-22 CO-60 < 2.4 05-Jan-22 ZN-65 < 5.5 05-Jan-22 ZR-NB-95 < 2.1 05-Jan-22 I-131 < 0.427 05-Jan-22 CS-134 < 4.3 05-Jan-22 CS-137 < 2.1 05-Jan-22 BA-LA-140 < 1.7 05-Jan-22 GROSS BETA 2.174 +/- 0.64 01-Feb-22 MN-54 < 3.1 01-Feb-22 CO-58 < 2.3 01-Feb-22 FE-59 < 5.5 01-Feb-22 CO-60 < 3.4 01-Feb-22 ZN-65 < 5.4 01-Feb-22 ZR-NB-95 < 2.2 01-Feb-22 I-131 < 0.298 01-Feb-22 CS-134 < 3.2 01-Feb-22 CS-137 < 3.0 01-Feb-22 BA-LA-140 < 1.4 01-Feb-22 GROSS BETA 3.089 +/- 0.704 03-Mar-22 MN-54 < 3.7 03-Mar-22 CO-58 < 3.6 03-Mar-22 FE-59 < 4.9 03-Mar-22 CO-60 < 2.5 03-Mar-22 ZN-65 < 4.3 03-Mar-22 ZR-NB-95 < 3.7 03-Mar-22 I-131 < 0.279 03-Mar-22 CS-134 < 4.9 03-Mar-22 CS-137 < 3.3 03-Mar-22 BA-LA-140 < 3.0 03-Mar-22 GROSS BETA 3.005 +/- 0.687 04-Apr-22 MN-54 < 2.2 04-Apr-22 CO-58 < 2.1 04-Apr-22 FE-59 < 1.5 04-Apr-22 CO-60 < 3.0 04-Apr-22 ZN-65 < 5.2 2022 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 04-Apr-22 ZR-NB-95 < 3.4 04-Apr-22 I-131 < 0.46 04-Apr-22 CS-134 < 3.5 04-Apr-22 CS-137 < 2.6 04-Apr-22 BA-LA-140 < 2.6 04-Apr-22 GROSS BETA 2.357 +/- 0.648 03-May-22 MN-54 < 5.3 03-May-22 CO-58 < 3.9 03-May-22 FE-59 < 6.1 03-May-22 CO-60 < 2.8 03-May-22 ZN-65 < 10.5 03-May-22 ZR-NB-95 < 5.5 03-May-22 I-131 < 0.285 03-May-22 CS-134 < 6.0 03-May-22 CS-137 < 5.3 03-May-22 BA-LA-140 < 3.7 03-May-22 GROSS BETA 3.477 +/- 1.024 01-Jun-22 MN-54 < 4.3 01-Jun-22 CO-58 < 5.9 01-Jun-22 FE-59 < 8.2 01-Jun-22 CO-60 < 4.9 01-Jun-22 ZN-65 < 10.9 01-Jun-22 ZR-NB-95 < 4.1 01-Jun-22 I-131 < 0.39 01-Jun-22 CS-134 < 6.5 01-Jun-22 CS-137 < 6.5 01-Jun-22 BA-LA-140 < 7.2 01-Jun-22 GROSS BETA 2.088 +/- 0.482 06-Jul-22 MN-54 < 4.9 06-Jul-22 CO-58 < 2.7 06-Jul-22 FE-59 < 7.3 06-Jul-22 CO-60 < 2.9 06-Jul-22 ZN-65 < 2.7 06-Jul-22 ZR-NB-95 < 4.9 06-Jul-22 I-131 < 0.238 06-Jul-22 CS-134 < 6.7 06-Jul-22 CS-137 < 3.5 06-Jul-22 BA-LA-140 < 3.5 2022 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 06-Jul-22 GROSS BETA 2.345 +/- 0.638 02-Aug-22 MN-54 < 4.6 02-Aug-22 CO-58 < 3.6 02-Aug-22 FE-59 < 5.7 02-Aug-22 CO-60 < 5.0 02-Aug-22 ZN-65 < 9.7 02-Aug-22 ZR-NB-95 < 4.2 02-Aug-22 I-131 < 0.244 02-Aug-22 CS-134 < 4.5 02-Aug-22 CS-137 < 6.5 02-Aug-22 BA-LA-140 < 2.1 02-Aug-22 GROSS BETA 3.388 +/- 0.709 07-Sep-22 MN-54 < 4.3 07-Sep-22 CO-58 < 3.6 07-Sep-22 FE-59 < 4.2 07-Sep-22 CO-60 < 2.6 07-Sep-22 ZN-65 < 9.3 07-Sep-22 ZR-NB-95 < 5.1 07-Sep-22 I-131 < 0.392 07-Sep-22 CS-134 < 4.8 07-Sep-22 CS-137 < 5.4 07-Sep-22 BA-LA-140 < 1.9 07-Sep-22 GROSS BETA 3.514 +/- 0.717 03-Oct-22 MN-54 < 3.3 03-Oct-22 CO-58 < 2.8 03-Oct-22 FE-59 < 2.5 03-Oct-22 CO-60 < 2.9 03-Oct-22 ZN-65 < 3.8 03-Oct-22 ZR-NB-95 < 2.4 03-Oct-22 I-131 < 0.2 03-Oct-22 CS-134 < 3.8 03-Oct-22 CS-137 < 2.8 03-Oct-22 BA-LA-140 < 3.4 03-Oct-22 GROSS BETA 3.895 +/- 0.726 03-Nov-22 MN-54 < 1.4 03-Nov-22 CO-58 < 2.0 03-Nov-22 FE-59 < 3.2 03-Nov-22 CO-60 < 2.2 2022 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 03-Nov-22 ZN-65 < 2.6 03-Nov-22 ZR-NB-95 < 2.1 03-Nov-22 I-131 < 0.28 03-Nov-22 CS-134 < 2.8 03-Nov-22 CS-137 < 2.0 03-Nov-22 BA-LA-140 < 2.5 03-Nov-22 GROSS BETA 2.872 +/- 0.668 01-Dec-22 MN-54 < 4.1 01-Dec-22 MN-54 < 4.1 01-Dec-22 CO-58 < 4.4 01-Dec-22 CO-58 < 4.4 01-Dec-22 FE-59 < 9.2 01-Dec-22 CO-60 < 2.7 01-Dec-22 CO-60 < 2.7 01-Dec-22 ZN-65 < 5.8 01-Dec-22 ZN-65 < 5.8 01-Dec-22 ZR-NB-95 < 3.5 01-Dec-22 ZR-NB-95 < 3.5 01-Dec-22 I-131 < 0.297 01-Dec-22 I-131 < 0.297 01-Dec-22 CS-134 < 4.0 01-Dec-22 CS-134 < 4.0 01-Dec-22 CS-137 < 4.2 01-Dec-22 CS-137 < 4.2 01-Dec-22 BA-LA-140 < 5.6 01-Dec-22 BA-LA-140 < 5.6 01-Dec-22 GROSS BETA 1.862 +/- 1.015 01-Dec-22 GROSS BETA 1.862 +/- 1.015 01-Dec-22 FE-55 < 9.2 04-Jan-23 MN-54 < 1.0 04-Jan-23 CO-58 < 0.8 04-Jan-23 FE-59 < 2.8 04-Jan-23 CO-60 < 2.7 04-Jan-23 ZN-65 < 2.5 04-Jan-23 ZR-NB-95 < 1.2 04-Jan-23 I-131 < 0.26 04-Jan-23 CS-134 < 1.3 04-Jan-23 CS-137 < 2.0 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 44

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 04-Jan-23 BA-LA-140 < 1.2 04-Jan-23 GROSS BETA 2.899 +/- 0.7 2022 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 05-Jan-22 MN-54 < 2.6 05-Jan-22 CO-58 < 2.2 05-Jan-22 FE-59 < 3.4 05-Jan-22 CO-60 < 1.6 05-Jan-22 ZN-65 < 6.3 05-Jan-22 ZR-NB-95 < 3.0 05-Jan-22 I-131 < 0.325 05-Jan-22 CS-134 < 3.3 05-Jan-22 CS-137 < 3.8 05-Jan-22 BA-LA-140 < 1.9 05-Jan-22 GROSS BETA 2.959 +/- 0.702 01-Feb-22 MN-54 < 2.5 01-Feb-22 CO-58 < 1.8 01-Feb-22 FE-59 < 3.8 01-Feb-22 CO-60 < 1.7 01-Feb-22 ZN-65 < 4.3 01-Feb-22 ZR-NB-95 < 2.0 01-Feb-22 I-131 < 0.295 01-Feb-22 CS-134 < 2.6 01-Feb-22 CS-137 < 3.0 01-Feb-22 BA-LA-140 < 2.7 01-Feb-22 GROSS BETA 2.146 +/- 0.685 03-Mar-22 MN-54 < 5.0 03-Mar-22 CO-58 < 4.4 03-Mar-22 FE-59 < 5.5 03-Mar-22 CO-60 < 3.5 03-Mar-22 ZN-65 < 6.0 03-Mar-22 ZR-NB-95 < 3.0 03-Mar-22 I-131 < 0.295 03-Mar-22 CS-134 < 5.2 03-Mar-22 CS-137 < 4.6 03-Mar-22 BA-LA-140 < 4.1 03-Mar-22 GROSS BETA 3.165 +/- 0.694 04-Apr-22 MN-54 < 2.5 04-Apr-22 CO-58 < 2.8 04-Apr-22 FE-59 < 6.1 04-Apr-22 CO-60 < 1.8 04-Apr-22 ZN-65 < 6.8 2022 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 04-Apr-22 ZR-NB-95 < 1.8 04-Apr-22 I-131 < 0.308 04-Apr-22 CS-134 < 3.0 04-Apr-22 CS-137 < 2.4 04-Apr-22 BA-LA-140 < 2.7 04-Apr-22 GROSS BETA 1.694 +/- 0.651 03-May-22 MN-54 < 5.9 03-May-22 CO-58 < 4.7 03-May-22 FE-59 < 13.5 03-May-22 CO-60 < 5.7 03-May-22 ZN-65 < 12.3 03-May-22 ZR-NB-95 < 8.0 03-May-22 I-131 < 0.314 03-May-22 CS-134 < 7.8 03-May-22 CS-137 < 8.0 03-May-22 BA-LA-140 < 5.2 03-May-22 GROSS BETA 4.111 +/- 1.018 01-Jun-22 MN-54 < 2.5 01-Jun-22 CO-58 < 2.8 01-Jun-22 FE-59 < 2.1 01-Jun-22 CO-60 < 2.2 01-Jun-22 ZN-65 < 2.9 01-Jun-22 ZR-NB-95 < 3.0 01-Jun-22 I-131 < 0.324 01-Jun-22 CS-134 < 3.3 01-Jun-22 CS-137 < 2.9 01-Jun-22 BA-LA-140 < 1.9 01-Jun-22 GROSS BETA 2.096 +/- 0.468 06-Jul-22 MN-54 < 4.4 06-Jul-22 CO-58 < 2.8 06-Jul-22 FE-59 < 4.4 06-Jul-22 CO-60 < 3.3 06-Jul-22 ZN-65 < 9.1 06-Jul-22 ZR-NB-95 < 5.5 06-Jul-22 I-131 < 0.397 06-Jul-22 CS-134 < 5.1 06-Jul-22 CS-137 < 5.5 06-Jul-22 BA-LA-140 < 2.6 2022 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 06-Jul-22 GROSS BETA 2.721 +/- 0.711 02-Aug-22 MN-54 < 2.0 02-Aug-22 CO-58 < 2.5 02-Aug-22 FE-59 < 4.7 02-Aug-22 CO-60 < 1.5 02-Aug-22 ZN-65 < 4.2 02-Aug-22 ZR-NB-95 < 3.3 02-Aug-22 I-131 < 0.238 02-Aug-22 CS-134 < 2.8 02-Aug-22 CS-137 < 3.3 02-Aug-22 BA-LA-140 < 2.5 02-Aug-22 GROSS BETA 2.890 +/- 0.681 07-Sep-22 MN-54 < 3.5 07-Sep-22 CO-58 < 5.2 07-Sep-22 FE-59 < 5.5 07-Sep-22 CO-60 < 5.2 07-Sep-22 ZN-65 < 7.7 07-Sep-22 ZR-NB-95 < 3.2 07-Sep-22 I-131 < 0.402 07-Sep-22 CS-134 < 5.1 07-Sep-22 CS-137 < 5.1 07-Sep-22 BA-LA-140 < 5.5 07-Sep-22 GROSS BETA 3.075 +/- 0.747 03-Oct-22 MN-54 < 3.0 03-Oct-22 CO-58 < 2.5 03-Oct-22 FE-59 < 5.6 03-Oct-22 CO-60 < 2.5 03-Oct-22 ZN-65 < 4.2 03-Oct-22 ZR-NB-95 < 2.4 03-Oct-22 I-131 < 0.192 03-Oct-22 CS-134 < 2.2 03-Oct-22 CS-137 < 3.9 03-Oct-22 BA-LA-140 < 1.8 03-Oct-22 GROSS BETA 2.980 +/- 0.681 03-Nov-22 MN-54 < 2.9 03-Nov-22 MN-54 < 2.9 03-Nov-22 CO-58 < 2.4 03-Nov-22 CO-58 < 2.4 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 48

Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 03-Nov-22 FE-59 < 3.8 03-Nov-22 FE-59 < 3.8 03-Nov-22 CO-60 < 2.2 03-Nov-22 CO-60 < 2.2 03-Nov-22 ZN-65 < 5.2 03-Nov-22 ZN-65 < 5.2 03-Nov-22 ZR-NB-95 < 2.1 03-Nov-22 ZR-NB-95 < 2.1 03-Nov-22 I-131 < 0.416 03-Nov-22 CS-134 < 2.4 03-Nov-22 CS-134 < 2.4 03-Nov-22 CS-137 < 2.6 03-Nov-22 CS-137 < 2.6 03-Nov-22 BA-LA-140 < 2.2 03-Nov-22 BA-LA-140 < 2.2 03-Nov-22 GROSS BETA 3.254 +/- 0.751 03-Nov-22 GROSS BETA 3.254 +/- 0.751 01-Dec-22 MN-54 < 1.2 01-Dec-22 MN-54 < 1.2 01-Dec-22 CO-58 < 1.7 01-Dec-22 CO-58 < 1.7 01-Dec-22 FE-59 < 5.5 01-Dec-22 FE-59 < 5.5 01-Dec-22 CO-60 < 2.2 01-Dec-22 CO-60 < 2.2 01-Dec-22 ZN-65 < 5.6 01-Dec-22 ZN-65 < 5.6 01-Dec-22 ZR-NB-95 < 2.5 01-Dec-22 ZR-NB-95 < 2.5 01-Dec-22 I-131 < 0.288 01-Dec-22 I-131 < 0.288 01-Dec-22 CS-134 < 2.3 01-Dec-22 CS-134 < 2.3 01-Dec-22 CS-137 < 2.8 01-Dec-22 CS-137 < 2.8 01-Dec-22 BA-LA-140 < 1.7 01-Dec-22 BA-LA-140 < 1.7 01-Dec-22 GROSS BETA 1.854 +/- 1.102 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 49

Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Dec-22 GROSS BETA 1.854 +/- 1.102 04-Jan-23 MN-54 < 2.6 04-Jan-23 CO-58 < 2.2 04-Jan-23 FE-59 < 4.4 04-Jan-23 CO-60 < 2.5 04-Jan-23 ZN-65 < 4.4 04-Jan-23 ZR-NB-95 < 2.0 04-Jan-23 I-131 < 0.39 04-Jan-23 CS-134 < 2.3 04-Jan-23 CS-137 < 2.6 04-Jan-23 BA-LA-140 < 3.2 04-Jan-23 GROSS BETA 3.828 +/- 0.751 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 50

Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 05-Jan-22 H-3 < 157 04-Apr-22 H-3 < 166 06-Jul-22 H-3 < 167 03-Oct-22 H-3 < 157 03-Oct-22 H-3 < 157 Duplicate 04-Jan-23 H-3 < 157 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 51

Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: IO-DW Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 05-Jan-22 H-3 179 +/- 85 05-Jan-22 H-3 < 203 01-Feb-22 H-3 < 228 04-Apr-22 H-3 < 166 06-Jul-22 H-3 < 167 02-Aug-22 H-3 213 +/- 90 07-Sep-22 H-3 1877 +/- 154 03-Oct-22 H-3 1558 +/- 141 03-Oct-22 H-3 1640 +/- 146 03-Oct-22 H-3 3445 +/- 197 03-Nov-22 H-3 570 +/- 103 01-Dec-22 H-3 < 158 01-Dec-22 H-3 < 157 04-Jan-23 H-3 194 +/- 84 04-Jan-23 H-3 < 157 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 52

Exposure Pathway - Waterborne Shoreline Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 15-Feb-22 SHORELINE SEDIMENTS K-40 11,747.0 +/- 1,271.0 15-Feb-22 SHORELINE SEDIMENTS MN-54 < 58.2 15-Feb-22 SHORELINE SEDIMENTS CO-58 < 52.3 15-Feb-22 SHORELINE SEDIMENTS FE-59 < 118.2 15-Feb-22 SHORELINE SEDIMENTS CO-60 < 30.3 15-Feb-22 SHORELINE SEDIMENTS ZN-65 < 137.0 15-Feb-22 SHORELINE SEDIMENTS CS-134 < 41.1 15-Feb-22 SHORELINE SEDIMENTS CS-137 < 48.0 18-May-22 SHORELINE SEDIMENTS K-40 5,496.4 +/- 433.9 18-May-22 SHORELINE SEDIMENTS MN-54 < 25.4 18-May-22 SHORELINE SEDIMENTS CO-58 < 40.6 18-May-22 SHORELINE SEDIMENTS FE-59 < 104.0 18-May-22 SHORELINE SEDIMENTS CO-60 < 10.4 18-May-22 SHORELINE SEDIMENTS ZN-65 < 44.6 18-May-22 SHORELINE SEDIMENTS CS-134 < 16.5 18-May-22 SHORELINE SEDIMENTS CS-137 < 18.2 13-Sep-22 SHORELINE SEDIMENTS K-40 6,248.2 +/- 548.9 13-Sep-22 SHORELINE SEDIMENTS MN-54 < 24.6 13-Sep-22 SHORELINE SEDIMENTS CO-58 < 20.7 13-Sep-22 SHORELINE SEDIMENTS FE-59 < 62.6 13-Sep-22 SHORELINE SEDIMENTS CO-60 < 10.8 13-Sep-22 SHORELINE SEDIMENTS ZN-65 < 53.4 13-Sep-22 SHORELINE SEDIMENTS CS-134 < 21.6 13-Sep-22 SHORELINE SEDIMENTS CS-137 < 23.4 2022 Annual Radiological Environmental Operating Report Page C - 53 Wolf Creek Generating Station

Exposure Pathway - Waterborne Shoreline Sediment Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 31-Jan-22 SHORELINE SEDIMENTS K-40 10,204.0 +/- 1,006.0 31-Jan-22 SHORELINE SEDIMENTS MN-54 < 49.6 31-Jan-22 SHORELINE SEDIMENTS CO-58 < 66.0 31-Jan-22 SHORELINE SEDIMENTS FE-59 < 114.4 31-Jan-22 SHORELINE SEDIMENTS CO-60 < 32.4 31-Jan-22 SHORELINE SEDIMENTS ZN-65 < 98.8 31-Jan-22 SHORELINE SEDIMENTS CS-134 < 37.6 31-Jan-22 SHORELINE SEDIMENTS CS-137 < 57.0 07-Nov-22 SHORELINE SEDIMENTS K-40 14,006.0 +/- 708.3 07-Nov-22 SHORELINE SEDIMENTS MN-54 < 28.1 07-Nov-22 SHORELINE SEDIMENTS CO-58 < 32.7 07-Nov-22 SHORELINE SEDIMENTS FE-59 < 91.0 07-Nov-22 SHORELINE SEDIMENTS CO-60 < 30.7 07-Nov-22 SHORELINE SEDIMENTS ZN-65 < 62.9 07-Nov-22 SHORELINE SEDIMENTS CS-134 < 21.5 07-Nov-22 SHORELINE SEDIMENTS CS-137 49.6 +/- 22.3 2022 Annual Radiological Environmental Operating Report Page C - 54 Wolf Creek Generating Station

Exposure Pathway - Waterborne Shoreline Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 18-May-22 SHORELINE SEDIMENTS K-40 9,266.4 +/- 527.4 18-May-22 SHORELINE SEDIMENTS K-40 9,975.9 +/- 546.4 18-May-22 SHORELINE SEDIMENTS MN-54 < 26.5 18-May-22 SHORELINE SEDIMENTS MN-54 < 28.4 18-May-22 SHORELINE SEDIMENTS CO-58 < 48.0 18-May-22 SHORELINE SEDIMENTS CO-58 < 49.4 18-May-22 SHORELINE SEDIMENTS FE-59 < 114.5 18-May-22 SHORELINE SEDIMENTS FE-59 < 158.1 18-May-22 SHORELINE SEDIMENTS CO-60 < 14.2 18-May-22 SHORELINE SEDIMENTS CO-60 < 17.0 18-May-22 SHORELINE SEDIMENTS ZN-65 < 64.4 18-May-22 SHORELINE SEDIMENTS ZN-65 < 53.7 18-May-22 SHORELINE SEDIMENTS CS-134 < 18.9 18-May-22 SHORELINE SEDIMENTS CS-134 < 21.3 18-May-22 SHORELINE SEDIMENTS CS-137 45.6 +/- 25.8 18-May-22 SHORELINE SEDIMENTS CS-137 44.3 +/- 23.5 13-Sep-22 SHORELINE SEDIMENTS K-40 10,615.0 +/- 703.0 13-Sep-22 SHORELINE SEDIMENTS MN-54 < 38.3 13-Sep-22 SHORELINE SEDIMENTS CO-58 < 31.8 13-Sep-22 SHORELINE SEDIMENTS FE-59 < 60.9 13-Sep-22 SHORELINE SEDIMENTS CO-60 < 14.4 13-Sep-22 SHORELINE SEDIMENTS ZN-65 < 66.4 13-Sep-22 SHORELINE SEDIMENTS CS-134 < 28.1 13-Sep-22 SHORELINE SEDIMENTS CS-137 < 32.8 2022 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 14-Apr-22 CHANNEL CATFISH K-40 2,776.4 +/- 345.2 14-Apr-22 CHANNEL CATFISH MN-54 < 9.3 14-Apr-22 CHANNEL CATFISH CO-58 < 10.1 14-Apr-22 CHANNEL CATFISH FE-59 < 25.9 14-Apr-22 CHANNEL CATFISH CO-60 < 14.8 14-Apr-22 CHANNEL CATFISH ZN-65 < 37.5 14-Apr-22 CHANNEL CATFISH I-131 < 99.4 14-Apr-22 CHANNEL CATFISH CS-134 < 13.8 14-Apr-22 CHANNEL CATFISH CS-137 < 14.4 14-Apr-22 CHANNEL CATFISH H-3 14,388.0 +/- 348.0 14-Apr-22 COMMON CARP K-40 3,170.4 +/- 424.5 14-Apr-22 COMMON CARP MN-54 < 17.7 14-Apr-22 COMMON CARP CO-58 < 21.4 14-Apr-22 COMMON CARP FE-59 < 23.9 14-Apr-22 COMMON CARP CO-60 < 17.7 14-Apr-22 COMMON CARP ZN-65 < 44.3 14-Apr-22 COMMON CARP I-131 < 78.6 14-Apr-22 COMMON CARP CS-134 < 20.7 14-Apr-22 COMMON CARP CS-137 < 21.6 14-Apr-22 COMMON CARP H-3 15,629.0 +/- 345.0 14-Apr-22 CRAPPIE K-40 2,423.3 +/- 354.3 14-Apr-22 CRAPPIE MN-54 < 7.8 14-Apr-22 CRAPPIE CO-58 < 11.8 14-Apr-22 CRAPPIE FE-59 < 28.7 14-Apr-22 CRAPPIE CO-60 < 13.6 14-Apr-22 CRAPPIE ZN-65 < 26.8 14-Apr-22 CRAPPIE I-131 < 97.2 14-Apr-22 CRAPPIE CS-134 < 18.2 14-Apr-22 CRAPPIE CS-137 < 14.4 14-Apr-22 CRAPPIE H-3 17,110.0 +/- 363.0 14-Apr-22 SMALLMOUTH BUFFALO K-40 3,143.7 +/- 359.4 14-Apr-22 SMALLMOUTH BUFFALO MN-54 < 12.4 14-Apr-22 SMALLMOUTH BUFFALO CO-58 < 19.4 14-Apr-22 SMALLMOUTH BUFFALO FE-59 < 40.3 14-Apr-22 SMALLMOUTH BUFFALO CO-60 < 10.1 14-Apr-22 SMALLMOUTH BUFFALO ZN-65 < 27.9 14-Apr-22 SMALLMOUTH BUFFALO I-131 < 90.3 14-Apr-22 SMALLMOUTH BUFFALO CS-134 < 16.4 2022 Annual Radiological Environmental Operating Report Page C - 56 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-Apr-22 SMALLMOUTH BUFFALO CS-137 < 17.0 14-Apr-22 SMALLMOUTH BUFFALO H-3 20,213.0 +/- 386.0 14-Apr-22 WHITE BASS K-40 3,172.7 +/- 434.9 14-Apr-22 WHITE BASS MN-54 < 13.8 14-Apr-22 WHITE BASS CO-58 < 16.2 14-Apr-22 WHITE BASS FE-59 < 36.5 14-Apr-22 WHITE BASS CO-60 < 13.3 14-Apr-22 WHITE BASS ZN-65 < 28.4 14-Apr-22 WHITE BASS I-131 < 95.9 14-Apr-22 WHITE BASS CS-134 < 18.9 14-Apr-22 WHITE BASS CS-137 < 22.8 14-Apr-22 WHITE BASS H-3 12,441.0 +/- 308.0 08-Nov-22 BLUE CATFISH K-40 3,196.5 +/- 141.9 08-Nov-22 BLUE CATFISH MN-54 < 6.2 08-Nov-22 BLUE CATFISH CO-58 < 4.4 08-Nov-22 BLUE CATFISH FE-59 < 17.3 08-Nov-22 BLUE CATFISH CO-60 < 7.5 08-Nov-22 BLUE CATFISH ZN-65 < 10.7 08-Nov-22 BLUE CATFISH I-131 < 93.0 08-Nov-22 BLUE CATFISH CS-134 < 5.5 08-Nov-22 BLUE CATFISH CS-137 < 6.3 08-Nov-22 BLUE CATFISH H-3 10,108.0 +/- 289.0 08-Nov-22 COMMON CARP K-40 2,970.2 +/- 215.5 Duplicate 08-Nov-22 COMMON CARP K-40 2,883.7 +/- 144.7 08-Nov-22 COMMON CARP MN-54 < 11.5 Duplicate 08-Nov-22 COMMON CARP MN-54 < 4.6 08-Nov-22 COMMON CARP CO-58 < 7.5 08-Nov-22 COMMON CARP CO-58 < 12.3 Duplicate 08-Nov-22 COMMON CARP FE-59 < 26.1 Duplicate 08-Nov-22 COMMON CARP FE-59 < 18.4 08-Nov-22 COMMON CARP CO-60 < 10.0 Duplicate 08-Nov-22 COMMON CARP CO-60 < 13.0 08-Nov-22 COMMON CARP ZN-65 < 19.9 Duplicate 08-Nov-22 COMMON CARP ZN-65 < 13.2 08-Nov-22 COMMON CARP I-131 < 77.1 08-Nov-22 COMMON CARP I-131 < 97.8 Duplicate 08-Nov-22 COMMON CARP CS-134 < 9.0 Duplicate 08-Nov-22 COMMON CARP CS-134 < 6.7 2022 Annual Radiological Environmental Operating Report Page C - 57 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 08-Nov-22 COMMON CARP CS-137 < 11.6 Duplicate 08-Nov-22 COMMON CARP CS-137 < 10.5 08-Nov-22 COMMON CARP H-3 8,464.0 +/- 264.0 08-Nov-22 COMMON CARP H-3 8,364.0 +/- 262.0 Duplicate 08-Nov-22 SMALLMOUTH BUFFALO K-40 3,103.1 +/- 150.1 08-Nov-22 SMALLMOUTH BUFFALO MN-54 < 8.3 08-Nov-22 SMALLMOUTH BUFFALO CO-58 < 8.0 08-Nov-22 SMALLMOUTH BUFFALO FE-59 < 25.6 08-Nov-22 SMALLMOUTH BUFFALO CO-60 < 6.9 08-Nov-22 SMALLMOUTH BUFFALO ZN-65 < 16.1 08-Nov-22 SMALLMOUTH BUFFALO I-131 < 89.7 08-Nov-22 SMALLMOUTH BUFFALO CS-134 < 7.3 08-Nov-22 SMALLMOUTH BUFFALO CS-137 < 7.5 08-Nov-22 SMALLMOUTH BUFFALO H-3 8,749.0 +/- 267.0 08-Nov-22 WALLEYE K-40 3,561.2 +/- 170.7 08-Nov-22 WALLEYE MN-54 < 7.7 08-Nov-22 WALLEYE CO-58 < 7.8 08-Nov-22 WALLEYE FE-59 < 11.6 08-Nov-22 WALLEYE CO-60 < 7.3 08-Nov-22 WALLEYE ZN-65 < 15.9 08-Nov-22 WALLEYE I-131 < 78.4 08-Nov-22 WALLEYE CS-134 < 5.9 08-Nov-22 WALLEYE CS-137 < 6.0 08-Nov-22 WALLEYE H-3 10,196.0 +/- 285.0 08-Nov-22 WHITE BASS K-40 3,336.0 +/- 165.4 08-Nov-22 WHITE BASS MN-54 < 7.0 08-Nov-22 WHITE BASS CO-58 < 7.2 08-Nov-22 WHITE BASS FE-59 < 21.6 08-Nov-22 WHITE BASS CO-60 < 6.7 08-Nov-22 WHITE BASS ZN-65 < 14.2 08-Nov-22 WHITE BASS I-131 < 87.4 08-Nov-22 WHITE BASS CS-134 < 7.1 08-Nov-22 WHITE BASS CS-137 < 6.2 08-Nov-22 WHITE BASS H-3 8,214.0 +/- 259.0 08-Nov-22 WHITE CRAPPIE K-40 3,538.8 +/- 172.5 08-Nov-22 WHITE CRAPPIE MN-54 < 6.5 08-Nov-22 WHITE CRAPPIE CO-58 < 7.8 08-Nov-22 WHITE CRAPPIE FE-59 < 10.2 2022 Annual Radiological Environmental Operating Report Page C - 58 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 08-Nov-22 WHITE CRAPPIE CO-60 < 8.0 08-Nov-22 WHITE CRAPPIE ZN-65 < 16.8 08-Nov-22 WHITE CRAPPIE I-131 < 75.1 08-Nov-22 WHITE CRAPPIE CS-134 < 5.9 08-Nov-22 WHITE CRAPPIE CS-137 < 7.2 08-Nov-22 WHITE CRAPPIE H-3 9,317.0 +/- 276.0 08-Nov-22 WIPER K-40 3,492.3 +/- 160.4 08-Nov-22 WIPER MN-54 < 8.0 08-Nov-22 WIPER CO-58 < 9.7 08-Nov-22 WIPER FE-59 < 24.3 08-Nov-22 WIPER CO-60 < 7.3 08-Nov-22 WIPER ZN-65 < 15.9 08-Nov-22 WIPER I-131 < 88.3 08-Nov-22 WIPER CS-134 < 7.3 08-Nov-22 WIPER CS-137 < 9.2 08-Nov-22 WIPER H-3 9,996.0 +/- 290.0 2022 Annual Radiological Environmental Operating Report Page C - 59 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 27-Apr-22 CHANNEL CATFISH K-40 3,707.8 +/- 527.3 27-Apr-22 CHANNEL CATFISH MN-54 < 24.0 27-Apr-22 CHANNEL CATFISH CO-58 < 25.2 27-Apr-22 CHANNEL CATFISH FE-59 < 50.6 27-Apr-22 CHANNEL CATFISH CO-60 < 21.2 27-Apr-22 CHANNEL CATFISH ZN-65 < 26.0 27-Apr-22 CHANNEL CATFISH I-131 < 82.3 27-Apr-22 CHANNEL CATFISH CS-134 < 21.7 27-Apr-22 CHANNEL CATFISH CS-137 < 21.7 27-Apr-22 CHANNEL CATFISH H-3 126.0 +/- 66.0 27-Apr-22 COMMON CARP K-40 4,065.9 +/- 527.7 27-Apr-22 COMMON CARP MN-54 < 18.9 27-Apr-22 COMMON CARP CO-58 < 12.2 27-Apr-22 COMMON CARP FE-59 < 53.7 27-Apr-22 COMMON CARP CO-60 < 16.7 27-Apr-22 COMMON CARP ZN-65 < 30.0 27-Apr-22 COMMON CARP I-131 < 63.2 27-Apr-22 COMMON CARP CS-134 < 26.9 27-Apr-22 COMMON CARP CS-137 < 17.4 27-Apr-22 COMMON CARP H-3 < 145.0 27-Apr-22 CRAPPIE K-40 4,126.6 +/- 474.1 27-Apr-22 CRAPPIE MN-54 < 20.2 27-Apr-22 CRAPPIE CO-58 < 17.5 27-Apr-22 CRAPPIE FE-59 < 63.0 27-Apr-22 CRAPPIE CO-60 < 15.5 27-Apr-22 CRAPPIE ZN-65 < 50.2 27-Apr-22 CRAPPIE I-131 < 61.4 27-Apr-22 CRAPPIE CS-134 < 23.2 27-Apr-22 CRAPPIE CS-137 < 21.1 27-Apr-22 CRAPPIE H-3 < 137.0 27-Apr-22 DRUM K-40 4,238.7 +/- 482.3 27-Apr-22 DRUM MN-54 < 15.8 27-Apr-22 DRUM CO-58 < 30.5 27-Apr-22 DRUM FE-59 < 37.8 27-Apr-22 DRUM CO-60 < 19.1 27-Apr-22 DRUM ZN-65 < 47.4 27-Apr-22 DRUM I-131 < 87.8 27-Apr-22 DRUM CS-134 < 25.8 2022 Annual Radiological Environmental Operating Report Page C - 60 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 27-Apr-22 DRUM CS-137 < 20.3 27-Apr-22 DRUM H-3 < 151.0 27-Apr-22 SMALLMOUTH BUFFALO K-40 3,900.4 +/- 526.8 27-Apr-22 SMALLMOUTH BUFFALO MN-54 < 23.9 27-Apr-22 SMALLMOUTH BUFFALO CO-58 < 28.2 27-Apr-22 SMALLMOUTH BUFFALO FE-59 < 49.5 27-Apr-22 SMALLMOUTH BUFFALO CO-60 < 13.7 27-Apr-22 SMALLMOUTH BUFFALO ZN-65 < 54.1 27-Apr-22 SMALLMOUTH BUFFALO I-131 < 70.0 27-Apr-22 SMALLMOUTH BUFFALO CS-134 < 27.0 27-Apr-22 SMALLMOUTH BUFFALO CS-137 < 20.3 27-Apr-22 SMALLMOUTH BUFFALO H-3 < 144.0 27-Apr-22 WHITE BASS K-40 3,705.6 +/- 532.6 27-Apr-22 WHITE BASS MN-54 < 27.4 27-Apr-22 WHITE BASS CO-58 < 25.0 27-Apr-22 WHITE BASS FE-59 < 54.6 27-Apr-22 WHITE BASS CO-60 < 24.0 27-Apr-22 WHITE BASS ZN-65 < 54.2 27-Apr-22 WHITE BASS I-131 < 82.0 27-Apr-22 WHITE BASS CS-134 < 27.3 27-Apr-22 WHITE BASS CS-137 < 15.3 27-Apr-22 WHITE BASS H-3 < 126.0 21-Sep-22 BIGMOUTH BUFFALO K-40 3,266.9 +/- 380.0 21-Sep-22 BIGMOUTH BUFFALO MN-54 < 15.6 21-Sep-22 BIGMOUTH BUFFALO CO-58 < 15.3 21-Sep-22 BIGMOUTH BUFFALO FE-59 < 22.7 21-Sep-22 BIGMOUTH BUFFALO CO-60 < 10.0 21-Sep-22 BIGMOUTH BUFFALO ZN-65 < 34.6 21-Sep-22 BIGMOUTH BUFFALO I-131 < 22.5 21-Sep-22 BIGMOUTH BUFFALO CS-134 < 16.9 21-Sep-22 BIGMOUTH BUFFALO CS-137 < 17.8 21-Sep-22 BIGMOUTH BUFFALO H-3 < 129.0 21-Sep-22 CHANNEL CATFISH K-40 3,922.5 +/- 329.9 21-Sep-22 CHANNEL CATFISH MN-54 < 11.4 21-Sep-22 CHANNEL CATFISH CO-58 < 10.5 21-Sep-22 CHANNEL CATFISH FE-59 < 14.2 21-Sep-22 CHANNEL CATFISH CO-60 < 7.1 21-Sep-22 CHANNEL CATFISH ZN-65 < 14.9 2022 Annual Radiological Environmental Operating Report Page C - 61 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 21-Sep-22 CHANNEL CATFISH I-131 < 20.5 21-Sep-22 CHANNEL CATFISH CS-134 < 11.2 21-Sep-22 CHANNEL CATFISH CS-137 < 11.1 21-Sep-22 CHANNEL CATFISH H-3 < 131.0 21-Sep-22 COMMON CARP K-40 3,307.3 +/- 3,423.0 21-Sep-22 COMMON CARP MN-54 < 12.3 21-Sep-22 COMMON CARP CO-58 < 11.1 21-Sep-22 COMMON CARP FE-59 < 25.4 21-Sep-22 COMMON CARP CO-60 < 6.0 21-Sep-22 COMMON CARP ZN-65 < 15.1 21-Sep-22 COMMON CARP I-131 < 18.8 21-Sep-22 COMMON CARP CS-134 < 11.2 21-Sep-22 COMMON CARP CS-137 < 12.5 21-Sep-22 COMMON CARP H-3 < 127.0 21-Sep-22 CRAPPIE K-40 3,351.2 +/- 380.9 21-Sep-22 CRAPPIE MN-54 < 17.7 21-Sep-22 CRAPPIE CO-58 < 15.7 21-Sep-22 CRAPPIE FE-59 < 37.0 21-Sep-22 CRAPPIE CO-60 < 18.0 21-Sep-22 CRAPPIE ZN-65 < 42.4 21-Sep-22 CRAPPIE I-131 < 24.7 21-Sep-22 CRAPPIE CS-134 < 16.9 21-Sep-22 CRAPPIE CS-137 < 18.2 21-Sep-22 CRAPPIE H-3 < 129.0 21-Sep-22 SMALLMOUTH BUFFALO K-40 1,497.6 +/- 317.8 21-Sep-22 SMALLMOUTH BUFFALO MN-54 < 13.6 21-Sep-22 SMALLMOUTH BUFFALO CO-58 < 12.6 21-Sep-22 SMALLMOUTH BUFFALO FE-59 < 22.4 21-Sep-22 SMALLMOUTH BUFFALO CO-60 < 9.6 21-Sep-22 SMALLMOUTH BUFFALO ZN-65 < 23.4 21-Sep-22 SMALLMOUTH BUFFALO I-131 < 35.8 21-Sep-22 SMALLMOUTH BUFFALO CS-134 < 14.3 21-Sep-22 SMALLMOUTH BUFFALO CS-137 < 11.5 21-Sep-22 SMALLMOUTH BUFFALO H-3 < 136.0 2022 Annual Radiological Environmental Operating Report Page C - 62 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-May-22 HORSERADISH LEAVES BE-7 853.3 +/- 232.9 12-May-22 HORSERADISH LEAVES K-40 4,457.7 +/- 519.1 12-May-22 HORSERADISH LEAVES MN-54 < 17.9 12-May-22 HORSERADISH LEAVES CO-58 < 12.2 12-May-22 HORSERADISH LEAVES FE-59 < 43.0 12-May-22 HORSERADISH LEAVES CO-60 < 12.4 12-May-22 HORSERADISH LEAVES ZN-65 < 35.2 12-May-22 HORSERADISH LEAVES ZR-NB-95 < 21.2 12-May-22 HORSERADISH LEAVES I-131 < 38.4 12-May-22 HORSERADISH LEAVES CS-134 < 18.2 12-May-22 HORSERADISH LEAVES CS-137 < 15.5 09-Jun-22 HORSERADISH LEAVES BE-7 1,369.9 +/- 269.4 09-Jun-22 HORSERADISH LEAVES K-40 4,269.1 +/- 469.3 09-Jun-22 HORSERADISH LEAVES MN-54 < 20.5 09-Jun-22 HORSERADISH LEAVES CO-58 < 16.9 09-Jun-22 HORSERADISH LEAVES FE-59 < 36.3 09-Jun-22 HORSERADISH LEAVES CO-60 < 14.1 09-Jun-22 HORSERADISH LEAVES ZN-65 < 40.4 09-Jun-22 HORSERADISH LEAVES ZR-NB-95 < 19.7 09-Jun-22 HORSERADISH LEAVES I-131 < 48.4 09-Jun-22 HORSERADISH LEAVES CS-134 < 20.2 09-Jun-22 HORSERADISH LEAVES CS-137 < 17.2 20-Jul-22 HORSERADISH LEAVES BE-7 534.3 +/- 153.5 20-Jul-22 HORSERADISH LEAVES K-40 6,084.0 +/- 418.6 20-Jul-22 HORSERADISH LEAVES MN-54 < 13.8 20-Jul-22 HORSERADISH LEAVES CO-58 < 12.4 20-Jul-22 HORSERADISH LEAVES FE-59 < 37.6 20-Jul-22 HORSERADISH LEAVES CO-60 < 11.9 20-Jul-22 HORSERADISH LEAVES ZN-65 < 34.0 20-Jul-22 HORSERADISH LEAVES ZR-NB-95 < 19.5 20-Jul-22 HORSERADISH LEAVES I-131 < 30.9 20-Jul-22 HORSERADISH LEAVES CS-134 < 12.1 20-Jul-22 HORSERADISH LEAVES CS-137 < 13.8 04-Aug-22 HORSERADISH LEAVES BE-7 971.7 +/- 126.9 04-Aug-22 HORSERADISH LEAVES K-40 6,914.8 +/- 238.8 04-Aug-22 HORSERADISH LEAVES MN-54 < 10.1 04-Aug-22 HORSERADISH LEAVES CO-58 < 8.7 04-Aug-22 HORSERADISH LEAVES FE-59 < 23.8 2022 Annual Radiological Environmental Operating Report Page C - 63 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 04-Aug-22 HORSERADISH LEAVES CO-60 < 11.0 04-Aug-22 HORSERADISH LEAVES ZN-65 < 20.2 04-Aug-22 HORSERADISH LEAVES ZR-NB-95 < 8.7 04-Aug-22 HORSERADISH LEAVES I-131 < 36.9 04-Aug-22 HORSERADISH LEAVES CS-134 < 9.2 04-Aug-22 HORSERADISH LEAVES CS-137 < 8.2 2022 Annual Radiological Environmental Operating Report Page C - 64 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-May-22 HORSERADISH LEAVES BE-7 1,010.7 +/- 301.8 12-May-22 HORSERADISH LEAVES K-40 5,055.5 +/- 534.5 12-May-22 HORSERADISH LEAVES MN-54 < 16.3 12-May-22 HORSERADISH LEAVES CO-58 < 20.3 12-May-22 HORSERADISH LEAVES FE-59 < 26.8 12-May-22 HORSERADISH LEAVES CO-60 < 9.1 12-May-22 HORSERADISH LEAVES ZN-65 < 33.7 12-May-22 HORSERADISH LEAVES ZR-NB-95 < 20.0 12-May-22 HORSERADISH LEAVES I-131 < 40.2 12-May-22 HORSERADISH LEAVES CS-134 < 19.8 12-May-22 HORSERADISH LEAVES CS-137 < 20.3 09-Jun-22 HORSERADISH LEAVES BE-7 1,668.3 +/- 250.4 09-Jun-22 HORSERADISH LEAVES K-40 4,993.4 +/- 460.7 09-Jun-22 HORSERADISH LEAVES MN-54 < 18.1 09-Jun-22 HORSERADISH LEAVES CO-58 < 17.9 09-Jun-22 HORSERADISH LEAVES FE-59 < 25.3 09-Jun-22 HORSERADISH LEAVES CO-60 < 21.3 09-Jun-22 HORSERADISH LEAVES ZN-65 < 30.1 09-Jun-22 HORSERADISH LEAVES ZR-NB-95 < 18.5 09-Jun-22 HORSERADISH LEAVES I-131 < 59.8 09-Jun-22 HORSERADISH LEAVES CS-134 < 18.2 09-Jun-22 HORSERADISH LEAVES CS-137 < 20.8 20-Jul-22 HORSERADISH LEAVES BE-7 1,031.2 +/- 184.3 20-Jul-22 HORSERADISH LEAVES K-40 5,822.0 +/- 460.3 20-Jul-22 HORSERADISH LEAVES MN-54 < 17.2 20-Jul-22 HORSERADISH LEAVES CO-58 < 12.1 20-Jul-22 HORSERADISH LEAVES FE-59 < 19.5 20-Jul-22 HORSERADISH LEAVES CO-60 < 11.4 20-Jul-22 HORSERADISH LEAVES ZN-65 < 22.3 20-Jul-22 HORSERADISH LEAVES ZR-NB-95 < 16.4 20-Jul-22 HORSERADISH LEAVES I-131 < 34.1 20-Jul-22 HORSERADISH LEAVES CS-134 < 12.2 20-Jul-22 HORSERADISH LEAVES CS-137 < 12.9 04-Aug-22 HORSERADISH LEAVES BE-7 1,598.2 +/- 269.6 04-Aug-22 HORSERADISH LEAVES K-40 6,785.4 +/- 564.1 04-Aug-22 HORSERADISH LEAVES MN-54 < 20.9 04-Aug-22 HORSERADISH LEAVES CO-58 < 24.2 04-Aug-22 HORSERADISH LEAVES FE-59 < 56.0 2022 Annual Radiological Environmental Operating Report Page C - 65 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 04-Aug-22 HORSERADISH LEAVES CO-60 < 15.4 04-Aug-22 HORSERADISH LEAVES ZN-65 < 56.8 04-Aug-22 HORSERADISH LEAVES ZR-NB-95 < 38.5 04-Aug-22 HORSERADISH LEAVES I-131 < 50.2 04-Aug-22 HORSERADISH LEAVES CS-134 < 21.1 04-Aug-22 HORSERADISH LEAVES CS-137 < 31.7 2022 Annual Radiological Environmental Operating Report Page C - 66 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-May-22 HORSERADISH LEAVES BE-7 823.3 +/- 205.6 12-May-22 HORSERADISH LEAVES K-40 4,050.1 +/- 410.9 12-May-22 HORSERADISH LEAVES MN-54 < 16.5 12-May-22 HORSERADISH LEAVES CO-58 < 15.3 12-May-22 HORSERADISH LEAVES FE-59 < 33.6 12-May-22 HORSERADISH LEAVES CO-60 < 12.1 12-May-22 HORSERADISH LEAVES ZN-65 < 34.5 12-May-22 HORSERADISH LEAVES ZR-NB-95 < 17.9 12-May-22 HORSERADISH LEAVES I-131 < 31.7 12-May-22 HORSERADISH LEAVES CS-134 < 14.1 12-May-22 HORSERADISH LEAVES CS-137 < 10.2 09-Jun-22 HORSERADISH LEAVES BE-7 1,516.6 +/- 174.1 09-Jun-22 HORSERADISH LEAVES K-40 4,590.0 +/- 405.6 09-Jun-22 HORSERADISH LEAVES MN-54 < 7.6 09-Jun-22 HORSERADISH LEAVES CO-58 < 14.2 09-Jun-22 HORSERADISH LEAVES FE-59 < 20.1 09-Jun-22 HORSERADISH LEAVES CO-60 < 5.5 09-Jun-22 HORSERADISH LEAVES ZN-65 < 30.7 09-Jun-22 HORSERADISH LEAVES ZR-NB-95 < 15.1 09-Jun-22 HORSERADISH LEAVES I-131 < 25.2 09-Jun-22 HORSERADISH LEAVES CS-134 < 12.9 09-Jun-22 HORSERADISH LEAVES CS-137 < 10.8 20-Jul-22 HORSERADISH LEAVES BE-7 583.7 +/- 170.4 20-Jul-22 HORSERADISH LEAVES K-40 6,078.8 +/- 456.2 20-Jul-22 HORSERADISH LEAVES MN-54 < 8.0 20-Jul-22 HORSERADISH LEAVES CO-58 < 11.5 20-Jul-22 HORSERADISH LEAVES FE-59 < 35.4 20-Jul-22 HORSERADISH LEAVES CO-60 < 7.4 20-Jul-22 HORSERADISH LEAVES ZN-65 < 28.7 20-Jul-22 HORSERADISH LEAVES ZR-NB-95 < 12.7 20-Jul-22 HORSERADISH LEAVES I-131 < 29.3 20-Jul-22 HORSERADISH LEAVES CS-134 < 12.5 20-Jul-22 HORSERADISH LEAVES CS-137 < 13.6 04-Aug-22 HORSERADISH LEAVES BE-7 1,010.3 +/- 163.1 04-Aug-22 HORSERADISH LEAVES K-40 6,579.9 +/- 370.3 04-Aug-22 HORSERADISH LEAVES MN-54 < 7.8 04-Aug-22 HORSERADISH LEAVES CO-58 < 10.4 04-Aug-22 HORSERADISH LEAVES FE-59 < 20.8 2022 Annual Radiological Environmental Operating Report Page C - 67 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 04-Aug-22 HORSERADISH LEAVES CO-60 < 10.9 04-Aug-22 HORSERADISH LEAVES ZN-65 < 13.2 04-Aug-22 HORSERADISH LEAVES ZR-NB-95 < 11.9 04-Aug-22 HORSERADISH LEAVES I-131 < 27.8 04-Aug-22 HORSERADISH LEAVES CS-134 < 9.8 04-Aug-22 HORSERADISH LEAVES CS-137 < 8.0 14-Sep-22 HORSERADISH LEAVES BE-7 874.0 +/- 156.7 14-Sep-22 HORSERADISH LEAVES K-40 6,029.6 +/- 449.7 14-Sep-22 HORSERADISH LEAVES MN-54 < 13.5 14-Sep-22 HORSERADISH LEAVES CO-58 < 13.8 14-Sep-22 HORSERADISH LEAVES FE-59 < 33.5 14-Sep-22 HORSERADISH LEAVES CO-60 < 12.4 14-Sep-22 HORSERADISH LEAVES ZN-65 < 23.6 14-Sep-22 HORSERADISH LEAVES ZR-NB-95 < 11.7 14-Sep-22 HORSERADISH LEAVES I-131 < 18.2 14-Sep-22 HORSERADISH LEAVES CS-134 < 17.2 14-Sep-22 HORSERADISH LEAVES CS-137 < 16.5 2022 Annual Radiological Environmental Operating Report Page C - 68 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-May-22 HORSERADISH LEAVES BE-7 818.9 +/- 328.6 12-May-22 HORSERADISH LEAVES K-40 4,690.5 +/- 566.6 12-May-22 HORSERADISH LEAVES MN-54 < 24.3 12-May-22 HORSERADISH LEAVES CO-58 < 26.2 12-May-22 HORSERADISH LEAVES FE-59 < 61.6 12-May-22 HORSERADISH LEAVES CO-60 < 17.6 12-May-22 HORSERADISH LEAVES ZN-65 < 46.3 12-May-22 HORSERADISH LEAVES ZR-NB-95 < 20.2 12-May-22 HORSERADISH LEAVES I-131 < 47.8 12-May-22 HORSERADISH LEAVES CS-134 < 26.6 12-May-22 HORSERADISH LEAVES CS-137 < 23.5 09-Jun-22 HORSERADISH LEAVES BE-7 1,382.5 +/- 216.0 09-Jun-22 HORSERADISH LEAVES K-40 4,940.2 +/- 458.5 09-Jun-22 HORSERADISH LEAVES MN-54 < 10.6 09-Jun-22 HORSERADISH LEAVES CO-58 < 15.2 09-Jun-22 HORSERADISH LEAVES FE-59 < 30.7 09-Jun-22 HORSERADISH LEAVES CO-60 < 7.4 09-Jun-22 HORSERADISH LEAVES ZN-65 < 20.8 09-Jun-22 HORSERADISH LEAVES ZR-NB-95 < 11.6 09-Jun-22 HORSERADISH LEAVES I-131 < 34.4 09-Jun-22 HORSERADISH LEAVES CS-134 < 14.6 09-Jun-22 HORSERADISH LEAVES CS-137 < 12.7 20-Jul-22 HORSERADISH LEAVES BE-7 1,015.1 +/- 248.9 20-Jul-22 HORSERADISH LEAVES K-40 5,772.1 +/- 519.6 20-Jul-22 HORSERADISH LEAVES MN-54 < 13.9 20-Jul-22 HORSERADISH LEAVES CO-58 < 7.8 20-Jul-22 HORSERADISH LEAVES FE-59 < 24.6 20-Jul-22 HORSERADISH LEAVES CO-60 < 12.7 20-Jul-22 HORSERADISH LEAVES ZN-65 < 32.6 20-Jul-22 HORSERADISH LEAVES ZR-NB-95 < 16.5 20-Jul-22 HORSERADISH LEAVES I-131 < 33.6 20-Jul-22 HORSERADISH LEAVES CS-134 < 19.8 20-Jul-22 HORSERADISH LEAVES CS-137 < 17.0 14-Sep-22 HORSERADISH LEAVES BE-7 348.9 +/- 122.9 14-Sep-22 HORSERADISH LEAVES K-40 4,722.9 +/- 399.0 14-Sep-22 HORSERADISH LEAVES MN-54 < 16.6 14-Sep-22 HORSERADISH LEAVES CO-58 < 13.2 14-Sep-22 HORSERADISH LEAVES FE-59 < 21.3 2022 Annual Radiological Environmental Operating Report Page C - 69 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-Sep-22 HORSERADISH LEAVES CO-60 < 11.3 14-Sep-22 HORSERADISH LEAVES ZN-65 < 30.9 14-Sep-22 HORSERADISH LEAVES ZR-NB-95 < 14.0 14-Sep-22 HORSERADISH LEAVES I-131 < 14.7 14-Sep-22 HORSERADISH LEAVES CS-134 < 14.3 14-Sep-22 HORSERADISH LEAVES CS-137 < 10.8 2022 Annual Radiological Environmental Operating Report Page C - 70 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-May-22 HORSERADISH LEAVES BE-7 685.0 +/- 201.4 12-May-22 HORSERADISH LEAVES K-40 4,444.4 +/- 509.2 12-May-22 HORSERADISH LEAVES MN-54 < 16.9 12-May-22 HORSERADISH LEAVES CO-58 < 19.2 12-May-22 HORSERADISH LEAVES FE-59 < 35.7 12-May-22 HORSERADISH LEAVES CO-60 < 21.2 12-May-22 HORSERADISH LEAVES ZN-65 < 31.9 12-May-22 HORSERADISH LEAVES ZR-NB-95 < 23.2 12-May-22 HORSERADISH LEAVES I-131 < 59.5 12-May-22 HORSERADISH LEAVES CS-134 < 18.7 12-May-22 HORSERADISH LEAVES CS-137 < 12.0 09-Jun-22 HORSERADISH LEAVES BE-7 781.0 +/- 183.7 Duplicate 09-Jun-22 HORSERADISH LEAVES BE-7 951.3 +/- 208.0 09-Jun-22 HORSERADISH LEAVES K-40 3,931.1 +/- 408.8 09-Jun-22 HORSERADISH LEAVES K-40 3,522.5 +/- 388.9 Duplicate 09-Jun-22 HORSERADISH LEAVES MN-54 < 13.4 09-Jun-22 HORSERADISH LEAVES MN-54 < 10.7 Duplicate 09-Jun-22 HORSERADISH LEAVES CO-58 < 13.9 Duplicate 09-Jun-22 HORSERADISH LEAVES CO-58 < 8.2 09-Jun-22 HORSERADISH LEAVES FE-59 < 29.4 09-Jun-22 HORSERADISH LEAVES FE-59 < 24.6 Duplicate 09-Jun-22 HORSERADISH LEAVES CO-60 < 10.1 09-Jun-22 HORSERADISH LEAVES CO-60 < 9.4 Duplicate 09-Jun-22 HORSERADISH LEAVES ZN-65 < 21.3 Duplicate 09-Jun-22 HORSERADISH LEAVES ZN-65 < 16.4 09-Jun-22 HORSERADISH LEAVES ZR-NB-95 < 20.4 09-Jun-22 HORSERADISH LEAVES ZR-NB-95 < 12.9 Duplicate 09-Jun-22 HORSERADISH LEAVES I-131 < 36.4 Duplicate 09-Jun-22 HORSERADISH LEAVES I-131 < 58.3 09-Jun-22 HORSERADISH LEAVES CS-134 < 13.4 Duplicate 09-Jun-22 HORSERADISH LEAVES CS-134 < 17.2 09-Jun-22 HORSERADISH LEAVES CS-137 < 13.2 09-Jun-22 HORSERADISH LEAVES CS-137 < 12.5 Duplicate 20-Jul-22 HORSERADISH LEAVES BE-7 515.2 +/- 137.1 20-Jul-22 HORSERADISH LEAVES K-40 4,567.8 +/- 351.9 20-Jul-22 HORSERADISH LEAVES MN-54 < 12.3 20-Jul-22 HORSERADISH LEAVES CO-58 < 10.0 20-Jul-22 HORSERADISH LEAVES FE-59 < 17.1 2022 Annual Radiological Environmental Operating Report Page C - 71 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 20-Jul-22 HORSERADISH LEAVES CO-60 < 6.5 20-Jul-22 HORSERADISH LEAVES ZN-65 < 26.8 20-Jul-22 HORSERADISH LEAVES ZR-NB-95 < 8.2 20-Jul-22 HORSERADISH LEAVES I-131 < 20.9 20-Jul-22 HORSERADISH LEAVES CS-134 < 11.1 20-Jul-22 HORSERADISH LEAVES CS-137 < 8.1 04-Aug-22 HORSERADISH LEAVES BE-7 681.9 +/- 167.5 04-Aug-22 HORSERADISH LEAVES K-40 5,261.2 +/- 366.6 04-Aug-22 HORSERADISH LEAVES MN-54 < 12.0 04-Aug-22 HORSERADISH LEAVES CO-58 < 11.7 04-Aug-22 HORSERADISH LEAVES FE-59 < 31.3 04-Aug-22 HORSERADISH LEAVES CO-60 < 10.5 04-Aug-22 HORSERADISH LEAVES ZN-65 < 26.7 04-Aug-22 HORSERADISH LEAVES ZR-NB-95 < 18.0 04-Aug-22 HORSERADISH LEAVES I-131 < 37.2 04-Aug-22 HORSERADISH LEAVES CS-134 < 12.4 04-Aug-22 HORSERADISH LEAVES CS-137 < 11.7 14-Sep-22 HORSERADISH LEAVES BE-7 461.6 +/- 266.6 14-Sep-22 HORSERADISH LEAVES K-40 5,346.3 +/- 680.7 14-Sep-22 HORSERADISH LEAVES MN-54 < 28.5 14-Sep-22 HORSERADISH LEAVES CO-58 < 13.4 14-Sep-22 HORSERADISH LEAVES FE-59 < 30.1 14-Sep-22 HORSERADISH LEAVES CO-60 < 14.1 14-Sep-22 HORSERADISH LEAVES ZN-65 < 31.7 14-Sep-22 HORSERADISH LEAVES ZR-NB-95 < 24.1 14-Sep-22 HORSERADISH LEAVES I-131 < 24.6 14-Sep-22 HORSERADISH LEAVES CS-134 < 23.0 14-Sep-22 HORSERADISH LEAVES CS-137 < 18.3 2022 Annual Radiological Environmental Operating Report Page C - 72 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-D1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 01-Nov-22 IRRIGATED SOYBEANS BE-7 < 58.0 01-Nov-22 IRRIGATED SOYBEANS K-40 15,733.0 +/- 400.7 01-Nov-22 IRRIGATED SOYBEANS MN-54 < 6.5 01-Nov-22 IRRIGATED SOYBEANS CO-58 < 5.5 01-Nov-22 IRRIGATED SOYBEANS FE-59 < 20.9 01-Nov-22 IRRIGATED SOYBEANS CO-60 < 8.1 01-Nov-22 IRRIGATED SOYBEANS ZN-65 < 20.9 01-Nov-22 IRRIGATED SOYBEANS ZR-NB-95 < 6.6 01-Nov-22 IRRIGATED SOYBEANS I-131 < 8.9 01-Nov-22 IRRIGATED SOYBEANS CS-134 < 7.5 01-Nov-22 IRRIGATED SOYBEANS CS-137 < 9.4 2022 Annual Radiological Environmental Operating Report Page C - 73 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-D2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 21-Nov-22 IRRIGATED CORN BE-7 < 117.9 21-Nov-22 IRRIGATED CORN K-40 2,965.3 +/- 389.0 21-Nov-22 IRRIGATED CORN MN-54 < 20.0 21-Nov-22 IRRIGATED CORN CO-58 < 13.0 21-Nov-22 IRRIGATED CORN FE-59 < 50.5 21-Nov-22 IRRIGATED CORN CO-60 < 12.6 21-Nov-22 IRRIGATED CORN ZN-65 < 22.6 21-Nov-22 IRRIGATED CORN ZR-NB-95 < 28.7 21-Nov-22 IRRIGATED CORN I-131 < 32.8 21-Nov-22 IRRIGATED CORN CS-134 < 18.3 21-Nov-22 IRRIGATED CORN CS-137 < 9.1 2022 Annual Radiological Environmental Operating Report Page C - 74 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-U1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 03-Oct-22 IRRIGATED CORN BE-7 < 69.7 03-Oct-22 IRRIGATED CORN K-40 2,849.2 +/- 193.2 03-Oct-22 IRRIGATED CORN MN-54 < 5.1 03-Oct-22 IRRIGATED CORN CO-58 < 3.3 03-Oct-22 IRRIGATED CORN FE-59 < 15.8 03-Oct-22 IRRIGATED CORN CO-60 < 5.9 03-Oct-22 IRRIGATED CORN ZN-65 < 12.1 03-Oct-22 IRRIGATED CORN ZR-NB-95 < 6.2 03-Oct-22 IRRIGATED CORN I-131 < 8.0 03-Oct-22 IRRIGATED CORN CS-134 < 5.8 03-Oct-22 IRRIGATED CORN CS-137 < 5.8 28-Oct-22 IRRIGATED SOYBEANS BE-7 < 71.8 28-Oct-22 IRRIGATED SOYBEANS K-40 17,534.0 +/- 512.0 28-Oct-22 IRRIGATED SOYBEANS MN-54 < 9.8 28-Oct-22 IRRIGATED SOYBEANS CO-58 < 11.2 28-Oct-22 IRRIGATED SOYBEANS FE-59 < 29.1 28-Oct-22 IRRIGATED SOYBEANS CO-60 < 12.2 28-Oct-22 IRRIGATED SOYBEANS ZN-65 < 32.8 28-Oct-22 IRRIGATED SOYBEANS ZR-NB-95 < 9.2 28-Oct-22 IRRIGATED SOYBEANS I-131 < 16.8 28-Oct-22 IRRIGATED SOYBEANS CS-134 < 9.7 28-Oct-22 IRRIGATED SOYBEANS CS-137 < 12.0 2022 Annual Radiological Environmental Operating Report Page C - 75 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 15-Jul-22 WATER PLANTAIN BE-7 584.4 +/- 187.9 15-Jul-22 WATER PLANTAIN K-40 3,681.9 +/- 392.1 15-Jul-22 WATER PLANTAIN MN-54 < 10.6 15-Jul-22 WATER PLANTAIN CO-58 < 10.1 15-Jul-22 WATER PLANTAIN FE-59 < 28.9 15-Jul-22 WATER PLANTAIN CO-60 < 7.3 15-Jul-22 WATER PLANTAIN ZN-65 < 14.9 15-Jul-22 WATER PLANTAIN ZR-NB-95 < 13.1 15-Jul-22 WATER PLANTAIN I-131 < 44.8 15-Jul-22 WATER PLANTAIN CS-134 < 13.9 15-Jul-22 WATER PLANTAIN CS-137 < 14.9 2022 Annual Radiological Environmental Operating Report Page C - 76 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 07-Nov-22 AMERICAN PONDWEED BE-7 315.6 +/- 119.3 07-Nov-22 AMERICAN PONDWEED K-40 1,677.1 +/- 271.1 07-Nov-22 AMERICAN PONDWEED MN-54 < 12.5 07-Nov-22 AMERICAN PONDWEED CO-58 < 10.6 07-Nov-22 AMERICAN PONDWEED FE-59 < 25.2 07-Nov-22 AMERICAN PONDWEED CO-60 < 8.5 07-Nov-22 AMERICAN PONDWEED ZN-65 < 26.4 07-Nov-22 AMERICAN PONDWEED ZR-NB-95 < 15.9 07-Nov-22 AMERICAN PONDWEED I-131 < 15.8 07-Nov-22 AMERICAN PONDWEED CS-134 < 11.3 07-Nov-22 AMERICAN PONDWEED CS-137 < 11.1 2022 Annual Radiological Environmental Operating Report Page C - 77 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: SC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 20-Jun-22 CATTAIL BE-7 286.2 +/- 109.8 20-Jun-22 CATTAIL BE-7 260.8 +/- 131.5 Duplicate 20-Jun-22 CATTAIL K-40 1,950.3 +/- 257.7 20-Jun-22 CATTAIL K-40 1,761.7 +/- 254.9 Duplicate 20-Jun-22 CATTAIL MN-54 < 12.5 Duplicate 20-Jun-22 CATTAIL MN-54 < 11.8 20-Jun-22 CATTAIL CO-58 < 12.2 20-Jun-22 CATTAIL CO-58 < 13.7 Duplicate 20-Jun-22 CATTAIL FE-59 < 19.7 Duplicate 20-Jun-22 CATTAIL FE-59 < 25.2 20-Jun-22 CATTAIL CO-60 < 13.5 20-Jun-22 CATTAIL CO-60 < 11.8 Duplicate 20-Jun-22 CATTAIL ZN-65 < 12.7 20-Jun-22 CATTAIL ZN-65 < 19.1 Duplicate 20-Jun-22 CATTAIL ZR-NB-95 < 10.1 20-Jun-22 CATTAIL ZR-NB-95 < 14.6 Duplicate 20-Jun-22 CATTAIL I-131 < 22.2 20-Jun-22 CATTAIL I-131 < 21.6 Duplicate 20-Jun-22 CATTAIL CS-134 < 12.0 20-Jun-22 CATTAIL CS-134 < 13.6 Duplicate 20-Jun-22 CATTAIL CS-137 < 11.7 20-Jun-22 CATTAIL CS-137 < 11.4 Duplicate 27-Jul-22 CATTATIL BE-7 971.6 +/- 109.0 27-Jul-22 CATTATIL K-40 2,896.9 +/- 164.9 27-Jul-22 CATTATIL MN-54 < 7.4 27-Jul-22 CATTATIL CO-58 < 6.0 27-Jul-22 CATTATIL FE-59 < 18.4 27-Jul-22 CATTATIL CO-60 < 6.5 27-Jul-22 CATTATIL ZN-65 < 13.9 27-Jul-22 CATTATIL ZR-NB-95 < 10.8 27-Jul-22 CATTATIL I-131 < 45.0 27-Jul-22 CATTATIL CS-134 < 8.0 27-Jul-22 CATTATIL CS-137 < 7.2 2022 Annual Radiological Environmental Operating Report Page C - 78 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 18-May-22 BOTTOM SEDIMENT K-40 11,265.0 +/- 799.4 18-May-22 BOTTOM SEDIMENT MN-54 < 51.3 18-May-22 BOTTOM SEDIMENT CO-58 < 66.0 18-May-22 BOTTOM SEDIMENT FE-59 < 113.7 18-May-22 BOTTOM SEDIMENT CO-60 < 39.3 18-May-22 BOTTOM SEDIMENT ZN-65 < 111.6 18-May-22 BOTTOM SEDIMENT CS-134 < 35.6 18-May-22 BOTTOM SEDIMENT CS-137 < 47.3 18-May-22 BOTTOM SEDIMENT FE-55 < 11,743.0 13-Sep-22 BOTTOM SEDIMENT K-40 11,600.0 +/- 900.2 13-Sep-22 BOTTOM SEDIMENT MN-54 < 46.3 13-Sep-22 BOTTOM SEDIMENT CO-58 < 47.4 13-Sep-22 BOTTOM SEDIMENT FE-59 < 87.7 13-Sep-22 BOTTOM SEDIMENT CO-60 < 26.2 13-Sep-22 BOTTOM SEDIMENT ZN-65 < 88.0 13-Sep-22 BOTTOM SEDIMENT CS-134 < 33.2 13-Sep-22 BOTTOM SEDIMENT CS-137 < 45.4 13-Sep-22 BOTTOM SEDIMENT FE-55 < 27,680.0 2022 Annual Radiological Environmental Operating Report Page C - 79 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 10-May-22 BOTTOM SEDIMENT K-40 11,146.0 +/- 640.8 10-May-22 BOTTOM SEDIMENT MN-54 < 30.4 10-May-22 BOTTOM SEDIMENT CO-58 < 62.6 10-May-22 BOTTOM SEDIMENT FE-59 < 223.1 10-May-22 BOTTOM SEDIMENT CO-60 < 14.0 10-May-22 BOTTOM SEDIMENT ZN-65 < 60.7 10-May-22 BOTTOM SEDIMENT CS-134 < 25.1 10-May-22 BOTTOM SEDIMENT CS-137 41.3 +/- 20.0 2022 Annual Radiological Environmental Operating Report Page C - 80 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 18-May-22 BOTTOM SEDIMENT K-40 17,567.0 +/- 907.4 18-May-22 BOTTOM SEDIMENT MN-54 < 51.0 18-May-22 BOTTOM SEDIMENT CO-58 < 82.4 18-May-22 BOTTOM SEDIMENT FE-59 < 261.9 18-May-22 BOTTOM SEDIMENT CO-60 < 20.0 18-May-22 BOTTOM SEDIMENT ZN-65 < 105.6 18-May-22 BOTTOM SEDIMENT CS-134 < 33.4 18-May-22 BOTTOM SEDIMENT CS-137 76.6 +/- 27.7 13-Sep-22 BOTTOM SEDIMENT K-40 16,047.0 +/- 828.8 13-Sep-22 BOTTOM SEDIMENT MN-54 < 35.1 13-Sep-22 BOTTOM SEDIMENT CO-58 < 27.6 13-Sep-22 BOTTOM SEDIMENT FE-59 < 58.8 13-Sep-22 BOTTOM SEDIMENT CO-60 < 32.5 13-Sep-22 BOTTOM SEDIMENT ZN-65 < 82.9 13-Sep-22 BOTTOM SEDIMENT CS-134 < 26.7 13-Sep-22 BOTTOM SEDIMENT CS-137 89.3 +/- 36.5 2022 Annual Radiological Environmental Operating Report Page C - 81 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 27-Jul-22 BOTTOM SEDIMENT K-40 10,184.0 +/- 697.3 27-Jul-22 BOTTOM SEDIMENT MN-54 < 34.9 27-Jul-22 BOTTOM SEDIMENT CO-58 < 24.2 27-Jul-22 BOTTOM SEDIMENT FE-59 < 132.2 27-Jul-22 BOTTOM SEDIMENT CO-60 < 23.6 27-Jul-22 BOTTOM SEDIMENT ZN-65 < 80.1 27-Jul-22 BOTTOM SEDIMENT CS-134 < 27.9 27-Jul-22 BOTTOM SEDIMENT CS-137 < 27.2 2022 Annual Radiological Environmental Operating Report Page C - 82 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: SC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 03-Oct-22 BOTTOM SEDIMENT K-40 13,075.0 +/- 696.4 03-Oct-22 BOTTOM SEDIMENT MN-54 < 35.7 03-Oct-22 BOTTOM SEDIMENT CO-58 < 51.2 03-Oct-22 BOTTOM SEDIMENT FE-59 < 219.0 03-Oct-22 BOTTOM SEDIMENT CO-60 < 29.4 03-Oct-22 BOTTOM SEDIMENT ZN-65 < 74.3 03-Oct-22 BOTTOM SEDIMENT CS-134 < 19.2 03-Oct-22 BOTTOM SEDIMENT CS-137 < 22.2 2022 Annual Radiological Environmental Operating Report Page C - 83 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Vegetation Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 16-Jun-22 GRASS BE-7 3,620.2 +/- 431.1 16-Jun-22 GRASS K-40 10,763.0 +/- 821.7 16-Jun-22 GRASS MN-54 < 21.7 16-Jun-22 GRASS CO-58 < 24.8 16-Jun-22 GRASS FE-59 < 78.6 16-Jun-22 GRASS CO-60 < 12.3 16-Jun-22 GRASS ZN-65 < 30.4 16-Jun-22 GRASS ZR-NB-95 < 24.6 16-Jun-22 GRASS I-131 < 54.0 16-Jun-22 GRASS CS-134 < 25.4 16-Jun-22 GRASS CS-137 < 20.6 2022 Annual Radiological Environmental Operating Report Page C - 84 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 16-Jun-22 GRASS BE-7 9,866.6 +/- 534.1 16-Jun-22 GRASS K-40 5,048.7 +/- 551.7 16-Jun-22 GRASS MN-54 < 23.9 16-Jun-22 GRASS CO-58 < 26.9 16-Jun-22 GRASS FE-59 < 22.2 16-Jun-22 GRASS CO-60 < 22.9 16-Jun-22 GRASS ZN-65 < 38.7 16-Jun-22 GRASS ZR-NB-95 < 24.8 16-Jun-22 GRASS I-131 < 49.6 16-Jun-22 GRASS CS-134 < 24.3 16-Jun-22 GRASS CS-137 < 26.8 2022 Annual Radiological Environmental Operating Report Page C - 85 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Soil Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 31-Jan-22 SOIL K-40 11,597.0 +/- 1,001.0 31-Jan-22 SOIL MN-54 < 50.2 31-Jan-22 SOIL CO-58 < 37.6 31-Jan-22 SOIL FE-59 < 88.7 31-Jan-22 SOIL CO-60 < 26.8 31-Jan-22 SOIL ZN-65 < 93.1 31-Jan-22 SOIL CS-134 < 30.4 31-Jan-22 SOIL CS-137 122.0 +/- 44.7 03-Oct-22 SOIL K-40 10,809.0 +/- 521.4 03-Oct-22 SOIL MN-54 < 26.5 03-Oct-22 SOIL CO-58 < 31.3 03-Oct-22 SOIL FE-59 < 131.7 03-Oct-22 SOIL CO-60 < 19.4 03-Oct-22 SOIL ZN-65 < 46.3 03-Oct-22 SOIL CS-134 < 16.1 03-Oct-22 SOIL CS-137 211.5 +/- 26.7 2022 Annual Radiological Environmental Operating Report Page C - 86 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Soil Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 15-Nov-22 SOIL K-40 11,354.0 +/- 619.4 15-Nov-22 SOIL MN-54 < 26.0 15-Nov-22 SOIL CO-58 < 32.9 15-Nov-22 SOIL FE-59 < 50.3 15-Nov-22 SOIL CO-60 < 12.7 15-Nov-22 SOIL ZN-65 < 56.5 15-Nov-22 SOIL CS-134 < 16.5 15-Nov-22 SOIL CS-137 183.8 +/- 31.6 2022 Annual Radiological Environmental Operating Report Page C - 87 Wolf Creek Generating Station

Exposure Pathway - Ingestion Meat Location: G1.7 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 06-Nov-22 DEER K-40 2,785.6 +/- 126.2 06-Nov-22 DEER MN-54 < 4.8 06-Nov-22 DEER CO-58 < 6.9 06-Nov-22 DEER FE-59 < 15.7 06-Nov-22 DEER CO-60 < 5.1 06-Nov-22 DEER ZN-65 < 11.9 06-Nov-22 DEER CS-134 < 4.4 06-Nov-22 DEER CS-137 < 5.4 06-Nov-22 DEER H-3 4,512.0 +/- 186.0 2022 Annual Radiological Environmental Operating Report Page C - 88 Wolf Creek Generating Station

Exposure Pathway - Ingestion Meat Location: R2.6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 26-May-22 WILD TURKEY K-40 3,214.6 +/- 32.8 26-May-22 WILD TURKEY MN-54 < 9.5 26-May-22 WILD TURKEY CO-58 < 14.7 26-May-22 WILD TURKEY FE-59 < 18.3 26-May-22 WILD TURKEY CO-60 < 7.1 26-May-22 WILD TURKEY ZN-65 < 26.4 26-May-22 WILD TURKEY CS-134 < 12.3 26-May-22 WILD TURKEY CS-137 < 14.9 26-May-22 WILD TURKEY H-3 149.0 +/- 61.0 2022 Annual Radiological Environmental Operating Report Page C - 89 Wolf Creek Generating Station

APPENDIX D LAND USE CENSUS REPORT 2022 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

WOLF CREEK GENERATING STATION 2022 LAND USE CENSUS REPORT Prepared by:

12/06/2022 Joseph p. Augustyn Date Peer Review:

1/1/2023 Jon Matthew Vopat Date Approved by:

1/4/2023 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 2022 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. Also used Google Earth/Maps to obtain images of properties.

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.

2022 Land Use Census Report 1

RESULTS Four changes were identified for the nearest occupied residence in each sector. Eight changes were noted for the nearest garden producing broadleaf vegetation. Three out of the eight no longer have gardens in that sector. 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.

2022 Land Use Census Report 2

TABLE 1 2022 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 B4.09-18RD1739 C C1.92-16RD1655 None C3.58-RERD1675 D D2.33-RERD1520 None None E E1.78-QULA1451 None None F F1.84-QULA1419 None F2.48-RERD1380 G G2.82-13Rd1790 None None H H3.09-12RD1711 None H3.80-11RD1674 J J3.70-11RD1540 None J4.00-PLRD1080 K K2.79-12LA1435 None None L L2.10-NARD1339 None L2.39-NARD1309 M M2.34-14RD1346 None M3.69-LYLA1290 N N2.08-15RD1350 None None P P2.66-16RD1268 None P4.95-LADR340 Q Q2.35-MILA1619 None Q2.35-MILA1619 R R2.08-NALN1650 None None NOTE: Entries underlined indicate changes from the 2021 Land Use Census.

EXAMPLE: A2.60-17TE1527 "A" = Sector A "2.60" = 2.60 miles from the reactor "17TE1527" = address 2022 Land Use Census Report 3

TABLE 2 SECTOR 2021 NEAREST 2022 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 F1.84-QULA1419 G G3.03-13RD1820 G2.82-13Rd1790 H H3.09-12RD1711 H3.09-12RD1711 J J3.70-11RD1540 J3.70-11RD1540 K K2.70-12LA1437 K2.79-12LA1435 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 P2.66-16RD1268 Q Q2.35-MILA1619 Q2.35-MILA1619 R R2.08-NALN1650 R2.08-NALN1650 NOTE: Entries underlined indicate changes from the 2021 Land Use Census.

2022 Land Use Census Report 4

TABLE 3 2022 LAND USE CENSUS MILK AND GARDEN DATA SECTOR 2021 2022 2021 NEAREST 2022 NEAREST MILKING MILKING BROADLEAF BROADLEAF ANIMALS ANIMALS GARDEN GARDEN A None None A2.60-17TE1527 A2.60-17TE1527 B None None B3.35-QURD1755 B4.09-18RD1739 C None None C3.58-RERD1675 C3.58-RERD1675 D None None None None E None None E4.40-TRRD1551 None F None None F2.48-RERD1380 F2.48-RERD1380 G None None G4.08-SHRD1234 None H None None H4.95-10RD1726 H3.80-11RD1674 J None None J4.37-PLRD1040 J4.00-PLRD1080 K None None None None L None None L2.39-NARD1309 L2.39-NARD1309 M None None None M3.69-LYLA1290 N None None N2.38-RODR9 None P None None P4.69-DEST337 P4.95-LADR340 Q None None Q2.35-MILA1619 Q2.35-MILA1619 R None None None None NOTE: Underlined entries indicate changes from the 2021 Land Use Census.

2022 Land Use Census Report 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 4.09 6582 6000 4.84E-10 7000 3.59E-10 4.11E-10 6 C 3.58 5761 5000 2.51E-10 6000 1.85E-10 2.01E-10 10

  • D
  • E F 2.48 3991 3000 6.58E-10 4000 3.95E-10 3.97E-10 7 G

H 3.80 6116 6000 4.71E-10 7000 3.50E-10 4.57E-10 5 J 4.00 6437 5000 4.59E-10 6000 3.37E-10 2.84E-10 9

  • K L 2.39 3846 3000 1.02E-09 4000 6.11E-10 6.74E-10 3 M 3.69 5938 5000 4.07E-10 6000 2.99E-10 3.06E-10 8 N

P 4.95 7966 7000 7.51E-10 8000 5.11E-10 5.19E-10 4 Q 2.35 3782 3000 1.53E-09 4000 9.17E-10 1.05E-09 2

  • R
  • Sector D, E, K, and R have no broadleaf gardens to report.

Originated by: Date: 12/6/2022 Verified by: Date: 1/1/2023 2022 Land Use Census Report 6