ML22116A260

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2021 Annual Radiological Environmental Operating Report
ML22116A260
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 04/26/2022
From: Benham R
Wolf Creek
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RA 22-0036
Download: ML22116A260 (157)


Text

Ron Benham Director Nuclear and Regulatory Affairs April 26, 2022 RA 22-0036 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Docket No. 50-482: 2021 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, 2021, through December 31, 2021.

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

Sincerely, Ron Benham RDB Enclosure I: Wolf Creek Generating Station 2021 Annual Radiological Environmental Operating Report cc: S.S. Lee (NRC), w/e S. A. Morris (NRC), w/e G. E. Werner (NRC), w/e Senior Resident Inspector (NRC), w/e P.O. Box 411 l Burlington, KS 66839 l 6203648831

Enclosure I to RA 22-0036 WOLF CREEK GENERATING STATION 2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT (156 pages including this page)

Enclosure I WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION 2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT March 28, 2022

Enclosure I 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-49 Shoreline Sediment C-51 Fish C-53 Food/Garden C-60 Food/Crops C-74 Bottom Sediment C-77 Aquatic Vegetation C-81 Terrestrial Vegetation C-82 Soil C-84 Meat C-86 i

Enclosure I Appendix D - Land Use Census Report ii

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

Enclosure I EXECUTIVE

SUMMARY

Plant-related activation, corrosion, or fission products were not detected during 2021 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 2021 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 2021 Annual Radiological Environmental Operating Report for Wolf Creek Generating Station (WCGS) covers the period from January 1 through December 31, 2021. 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 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 1 of 32

Enclosure I 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. The surface water sample locations are shown in Figure 3.

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. The ground water sample locations are shown in Figure 3.

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. The drinking water sample locations are shown in Figures 3 and 5.

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. The shoreline sediment sample locations are shown in Figure 3.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 2 of 32

Enclosure I 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. No samples from R-2 were taken due to no growth in the garden.

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

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

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

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

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

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

Soil was sampled from the Environmental Education Area (EEA) and Makeup Discharge Structure (MUDS). Gamma isotopic analysis was performed on the soil samples. These samples were collected as part of a cooperative sampling effort with the KDHE. The sample locations are identified on Figure 3.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 3 of 32

Enclosure I Turkey was sampled from indicator sample location R 1.5. Gamma isotopic analysis and tritium analysis was performed on the turkey sample. This sample was collected as part of a cooperative sampling effort with the KDHE. The sample location is identified on Figure 4.

Deer was sampled from indicator sample location A 1.42. 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 2021 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 2021 weekly gross beta analyses range for indicator locations was 0.010 to 0.071 pCi/m3.

The 2021 weekly gross beta analyses range was within the 1983 and 1984 pre-operational range. Additionally, the annual mean for indicator locations for 2021 (0.028 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 2021 (0.028 pCi/m3) was the same as the controlled location (0.028 pCi/m3). The indicator location with the highest gross beta annual mean was location 49 (0.029 pCi/m3). One point higher than the controlled location (0.028 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 2021, the range for Be-7 detected activity was 0.066 to 0.120 pCi/m3 for indicator locations and the annual mean for indicator locations was 0.092 pCi/m3. The control location annual mean for Be-7 detected activity (0.086 pCi/m3) was lower than the annual mean of the indicator locations (0.092 pCi/m3).

The indicator location with the highest annual mean of detected Be-7 activity was location 32 (0.096 pCi/ m3).

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

The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2021 in air particulate filters and radioiodine canisters. No unusual trends were noted.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 4 of 32

Enclosure I 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 2021 was 15.6 mR per standardized 90-day quarter. The annual mean of the control sample locations in 2021 was 15.1 mR per standardized 90-day quarter.

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

The indicator sample location with the highest annual mean was location 22 (21.5 mR per standardized 90-day quarter) which is slightly higher than the annual mean of the control sample locations (15.1 mR per standardized 90-day quarter).

Based upon Condition Report 00027489, improvements were made in measuring and subtracting transit dose in 2010. As expected, the OSL results increased during 2010 based on how transit dosimeters are handled. Chart 3 visibly displays the increase of the OSL results since 2010. Chart 3 also displays how closely the indicator and control location OSL dosimeter results are for 2018. Condition Report 00128355 was written to reduce data elimination based on standard deviation starting in Quarter 3 of 2018. In 2021 no change in corrected trend was noted due to this change.

We recognize the dip on chart 3 for the first quarter in 2021. The dip was due to UPS not picking up the dosimeters until the following day. The transit dosimeters were outside the lead longer then normal, which caused the value to be higher. The uncorrected data was reviewed and still trendable with previous data.

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 13,457 pCi/L and the range was 11,817 to 15,543 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 (CR#10013322). Tritium activity was not detected in samples obtained from the John Redmond Reservoir (JRR) control sample location.

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

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.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 5 of 32

Enclosure I Tritium was the only activity detected during 2021 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 2021 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 (2.896 pCi/L) was slightly higher when compared to the annual mean of the control sample location gross beta activity (2.790 pCi/L). The 2021 annual means of gross beta activity for both the indicator and control sample locations were lower than those of the pre-operational monitoring year of 1984. In 1984, the annual mean of the indicator sample location gross beta activity was 7.5 pCi/L and the annual mean of the control sample location gross beta activity was 6.4 pCi/L.

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

No tritium was detected in the indicator sample location during 2021. 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) and JRR (control sample location). K-40 was also detected during pre-operational shoreline sediment monitoring.

No other radionuclides were detected in the DC or JRR shoreline sediment samples during 2021. The AP 07B-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2021 in shoreline sediment samples and no unusual trends were noted.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 6 of 32

Enclosure I 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 2021 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 with an annual mean of 7,518 pCi/kg. The detected tritium activity was attributable to plant operation. An adult consuming 21 kilograms of fish, at the maximum measured tritium concentration (9,947 pCi/kg), would receive a committed effective dose equivalent of 0.013 mRem.

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

No other radionuclides were detected in fish samples during 2021. 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 2021 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 2021 in crop samples and no unusual trends were noted.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 7 of 32

Enclosure I 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 2021 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 31 to 372 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 2021 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 activities 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 2021 in aquatic vegetation samples and no unusual trends were noted.

(3) Terrestrial Vegetation Naturally occurring Be-7 and K-40 activities 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 2021 in terrestrial vegetation and no unusual trends were noted.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 8 of 32

Enclosure I (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 samples collected in 2021. The detectable annual mean of the three was 157 pCi/kg, with a range of 112 to 184 pCi/L. 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 99 to 842 pCi/kg. The detected Cs-137 activity in soil sampled in 2021 is below and within the decay corrected pre-operational range and is likely due to fallout.

Plant-related activation, corrosion, or fission products were not detected during 2021 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 (371.0 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 (371.0 pCi/kg), would receive a committed effective dose equivalent of 0.002 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 (906.0 pCi/kg) was also detected in the deer sample. The detected tritium activity was attributable to plant operation.

An adult consuming 72.6 kilograms of deer meat, at the measured tritium concentration (906.0 pCi/kg), would receive a committed effective dose equivalent of 0.004 mRem.

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

III. PROGRAM REVISIONS/CHANGES No revisions or changes were made to AP 07B-004, Offsite Dose Calculation Manual (Radiological Environmental Monitoring Program) during 2021.

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Enclosure I IV. PROGRAM DEVIATIONS Air Samples Location 32 failed to meet the requirement for continuous sampler operation (CR#

10006111). 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 0.316 mRem for 2021.

Using sample data obtained from the REMP, an adult drinking 2 liters per day of surface water from Coffey County Lake, using the average tritium activity (10,450 pCi/L), would receive a committed effective dose equivalent of 0.484 mRem per year. For an adult eating 21 kg of fish per year from Coffey County Lake, using the average tritium activity (9,291 pCi/kg), would receive a committed effective dose equivalent of 0.012 mRem per year. Based upon the REMP results, the dose from both pathways was calculated to be 0.496 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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Enclosure I 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 2021 (CR# 10006111) Air sample was not collected at location #32 on 5/24/21. This was due to pump 8412 failing; the pump will only stay on for approximately 10-20 seconds then shut off. I pulled the pump from the field and replaced it with a new pump.

(CR# 10013322) For 2021 the yearly average surface water tritium level in Coffey County Lake (CCL) trended higher than the previous year. Possible contributors to this trend include limited makeup water pumped from the John Redmond Reservoir (JRR) discharge structure due to equipment issues, a drier year based on local weather conditions, and performing flexible power operation of the plant. This trend was mentioned in the 2021 Annual Radiological Environmental Operating Report (AREOR). It should be noted that after the tritium peaked in March the monthly tritium values trended down and leveled off for the remainder of 2021.

Additionally, the makeup water equipment issues have been resolved allowing makeup water from JRR to CCL, and local weather patterns have been normal. Flexible power operations of the plant will continue as scheduled.

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Enclosure I 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) 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 12 of 32

Enclosure I 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 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 13 of 32

Enclosure I 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).

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 14 of 32

Enclosure I 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.

2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 15 of 32

Enclosure I 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).

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Enclosure I 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 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 17 of 32

Enclosure I 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 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 18 of 32

Enclosure I 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) R1.5 1.5 NNE R Meat (Deer) A1.42 1.42 N A 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 19 of 32

Enclosure I 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 8.0 18.5 20.7 20.5 67.7 2 7.4 18.1 20.7 18.8 65.0 4 6.4 18.5 22.4 21.1 68.4 5 8.0 16.5 17.8 15.7 58.0 7 8.4 19.1 19.1 17.7 64.3 8 6.1 18.8 21.1 21.1 67.1 9 5.1 14.9 18.4 16.1 54.5 11 9.4 16.8 22.0 19.1 67.3 12 6.1 18.5 20.4 18.4 63.4 13 9.0 18.5 23.7 21.5 72.7 14 9.4 17.8 20.4 17.4 65.0 15 6.7 19.1 21.1 18.1 65.0 16 6.1 19.4 18.1 18.8 62.4 17 2.1 19.4 20.1 20.1 61.7 18 4.7 17.5 20.7 15.7 58.6 19 7.4 18.5 21.7 19.1 66.7 20 7.4 16.5 19.4 17.8 61.1 22 6.7 21.1 24.3 21.5 73.6 23 7.0 21.7 19.8 19.1 67.6 24 7.4 20.7 20.1 18.4 66.6 25 6.4 16.8 17.1 15.7 56.0 26 8.0 16.2 18.8 18.1 61.1 27 8.4 16.5 19.1 19.1 63.1 29 6.4 12.9 15.5 17.1 51.9 30 6.4 18.5 19.8 18.8 63.5 32 5.4 16.2 18.8 16.4 56.8 34 7.7 20.4 21.0 19.4 68.5 35 9.0 18.8 18.5 19.8 66.1 36 6.4 19.4 18.1 17.4 61.3 37 8.0 17.5 18.1 16.1 59.7 38 7.7 20.5 20.1 21.1 69.4 39 4.1 16.5 16.8 17.8 55.2 41 2.8 18.5 19.4 18.1 58.8 42 5.1 11.3 10.6 12.7 39.7 43 8.0 11.9 12.9 13.7 46.5 44 5.7 17.8 20.4 18.1 62.0 46 4.1 17.5 18.1 18.1 57.8 49 5.4 16.2 16.8 15.7 54.1 50 6.7 23.7 20.8 21.5 72.7 51 0.8 20.4 18.8 18.4 58.4 52 8.4 18.8 20.4 20.1 67.7 53 5.7 20.1 20.8 18.8 65.4 54 4.4 20.1 20.4 19.1 64.0 55 5.7 19.1 20.4 18.4 63.6 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 20 of 32

Enclosure I FIGURE 1 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 21 of 32

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Enclosure I FIGURE 5 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 25 of 32

Enclosure I CHART 1 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 26 of 32

Enclosure I CHART 2 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 27 of 32

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Enclosure I CHART 7 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 32 of 32

Enclosure I 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, 2021 through December, 2021

Enclosure I 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

Enclosure I 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

Enclosure I 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-124 Study ERW-94 1/11/2021 Ba-133 24.1 +/- 3.5 23.8 18.4 - 27.4 Pass ERW-94 1/11/2021 Cs-134 46.1 +/- 3.1 42.8 34.2 - 47.1 Pass ERW-94 1/11/2021 Cs-137 154 +/- 6.0 148 133 - 165 Pass ERW-94 1/11/2021 Co-60 39.4 +/- 3.2 34.6 30.8 - 40.8 Pass ERW-94 1/11/2021 Zn-65 66.2 +/- 6.3 61.6 54.6 - 75.0 Pass ERDW-96 1/11/2021 Gr. Alpha 58.4 +/- 2.6 63.3 33.2 - 78.5 Pass ERDW-96 1/11/2021 Gr. Beta 38.1 +/- 1.3 39.8 26.4 - 47.3 Pass ERDW-98 1/11/2021 Ra-226 16.3 +/- 0.5 15.5 11.5 - 17.8 Pass ERDW-98 1/11/2021 Ra-228 12.3 +/- 1.2 12.9 8.54 - 15.8 Pass ERDW-98 1/11/2021 Uranium 33.2 +/- 1.8 30.1 24.4 - 33.4 Pass ERW-100 1/11/2021 H-3 2,100 +/- 160 2,120 1,750 - 2,350 Pass RAD-126 Study ERDW-2194 7/12/2021 Ba-133 44.1 +/- 4.0 45.5 37.2 - 50.6 Pass ERDW-2194 7/12/2021 Cs-134 85.2 +/- 3.9 87.5 71.8 - 96.2 Pass ERDW-2194 7/12/2021 Cs-137 218 +/-8 208 187 - 230 Pass ERDW-2194 7/12/2021 Co-60 91.7 +/- 4.0 87.1 78.4 - 98.1 Pass ERDW-2194 7/12/2021 Zn-65 114 +/-9 102 91.8 - 122.0 Pass ERDW-2196 7/12/2021 Gr. Alpha 61.5 +/- 2.9 49.1 25.6 - 61.7 Pass ERDW-2196 7/12/2021 Gr. Beta 31.7 +/- 1.3 31.5 20.3 - 39.2 Pass ERDW-2200 7/12/2021 Ra-226 16.5 +/- 0.5 13.4 10.0 - 15.4 Failb ERDW-2200 7/12/2021 Ra-228 8.7 +/- 1.0 7.6 4.81 - 9.7 Pass ERDW-2200 7/12/2021 Uranium 71.7 +/- 2.3 62.3 50.9 - 68.5 Failc ERDW-2202 7/12/2021 H-3 11,300 +/- 300 10,400 9,050 - 11,400 Pass ERDW-2198 7/12/2021 I-131 22.3 +/- 1.1 20.8 17.2 - 25.0 Pass a

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

b The radium-226 result did not meet ERA acceptance criteria.

c The uranium result did not meet ERA acceptance criteria.

A-3

Enclosure I 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 2021-1 11/8/2021 Spike 1 167.0 171.4 0.03 2021-1 11/8/2021 Spike 2 167.0 159.4 -0.05 2021-1 11/8/2021 Spike 3 167.0 160.8 -0.04 2021-1 11/8/2021 Spike 4 167.0 164.5 -0.01 2021-1 11/8/2021 Spike 5 167.0 156.7 -0.06 2021-1 11/8/2021 Spike 6 167.0 152.3 -0.09 2021-1 11/8/2021 Spike 7 167.0 158.7 -0.05 2021-1 11/8/2021 Spike 8 167.0 161.6 -0.03 2021-1 11/8/2021 Spike 9 167.0 152.4 -0.09 2021-1 11/8/2021 Spike 10 167.0 155.7 -0.07 2021-1 11/8/2021 Spike 11 167.0 158.8 -0.05 2021-1 11/8/2021 Spike 12 167.0 163.1 -0.02 2021-1 11/8/2021 Spike 13 167.0 162.2 -0.03 2021-1 11/8/2021 Spike 14 167.0 158.8 -0.05 2021-1 11/8/2021 Spike 15 167.0 173.5 0.04 2021-1 11/8/2021 Spike 16 167.0 158.7 -0.05 2021-1 11/8/2021 Spike 17 167.0 162.9 -0.02 2021-1 11/8/2021 Spike 18 167.0 159.3 -0.05 2021-1 11/8/2021 Spike 19 167.0 158.2 -0.05 2021-1 11/8/2021 Spike 20 167.0 161.7 -0.03 Mean (Spike 1-20) 160.5 -0.04 Passd Standard Deviation (Spike 1-20) 5.2 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

Enclosure I 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 2021-2 11/8/2021 Spike 21 102.0 98.3 -0.04 2021-2 11/8/2021 Spike 22 102.0 88.4 -0.13 2021-2 11/8/2021 Spike 23 102.0 96.7 -0.05 2021-2 11/8/2021 Spike 24 102.0 101.4 -0.01 2021-2 11/8/2021 Spike 25 102.0 98.5 -0.03 2021-2 11/8/2021 Spike 26 102.0 96.3 -0.06 2021-2 11/8/2021 Spike 27 102.0 95.8 -0.06 2021-2 11/8/2021 Spike 28 102.0 94.3 -0.08 2021-2 11/8/2021 Spike 29 102.0 93.5 -0.08 2021-2 11/8/2021 Spike 30 102.0 95.7 -0.06 2021-2 11/8/2021 Spike 31 102.0 101.7 0.00 2021-2 11/8/2021 Spike 32 102.0 98.5 -0.03 2021-2 11/8/2021 Spike 33 102.0 96.7 -0.05 2021-2 11/8/2021 Spike 34 102.0 87.2 -0.15 2021-2 11/8/2021 Spike 35 102.0 89.7 -0.12 2021-2 11/8/2021 Spike 36 102.0 88.5 -0.13 2021-2 11/8/2021 Spike 37 102.0 85.4 -0.16 2021-2 11/8/2021 Spike 38 102.0 90.0 -0.12 2021-2 11/8/2021 Spike 39 102.0 90.9 -0.11 2021-2 11/8/2021 Spike 40 102.0 92.6 -0.09 Mean (Spike 21-40) 94.0 -0.08 Passd Standard Deviation (Spike 21-40) 4.7 0.05 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

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

c Performance Quotient (P) is calculated as ((reported dose - 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

Enclosure I TABLE A-4. Intralaboratory "Spiked" Samples Concentrationa b

Lab Code Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPW-55 1/8/2021 H-3 1,889 +/- 150 2,110 1,688 - 2,532 Pass 0.90 SPDW-62 1/11/2021 Gr. Alpha 34.3 +/- 1.7 64.9 34.0 - 80.4 Pass 0.53 SPDW-62 1/11/2021 Gr. Beta 9.2 +/- 0.8 8.9 3.6 - 17.4 Pass 1.04 SPW-131 1/19/2021 Sr-90 18.0 +/- 1.1 17.9 14.3 - 21.5 Pass 1.00 SPW-133 1/19/2021 H-3 1,842 +/- 150 2,110 1,688 - 2,532 Pass 0.87 SPW-188 1/18/2021 Ra-228 14.2 +/- 1.7 14.9 10.4 - 19.3 Pass 0.96 SPW-236 1/26/2021 Ra-228 12.2 +/- 1.9 15.3 10.7 - 19.9 Pass 0.80 SPW-305 2/5/2021 H-3 1,785 +/- 147 2,110 1,688 - 2,532 Pass 0.85 SPW-372 2/12/2021 H-3 1,742 +/- 145 2,110 1,688 - 2,532 Pass 0.83 SPW-526 3/5/2021 H-3 1,899 +/- 150 2,110 1,688 - 2,532 Pass 0.90 SPW-692 3/19/2021 H-3 1,953 +/- 151 2,110 1,688 - 2,532 Pass 0.93 SPW-694 1/4/2021 Ra-226 9.7 +/- 0.4 12.3 8.6 - 16.0 Pass 0.79 SPW-800 3/30/2021 Ra-228 15.8 +/- 2.0 15.3 10.7 - 19.9 Pass 1.03 SPW-802 3/31/2021 H-3 1,878 +/- 150 2,110 1,688 - 2,532 Pass 0.89 SPW-810 3/19/2021 Ra-226 11.4 +/- 0.3 12.3 8.6 - 16.0 Pass 0.93 SPDW-30103 3/31/2021 Ra-226 13.5 +/- 0.4 12.3 8.6 - 16.0 Pass 1.10 SPW-812 4/1/2021 H-3 2,005 +/- 155 2,110 1,688 - 2,532 Pass 0.95 SPW-919 4/7/2021 H-3 1,877 +/- 149 2,110 1,688 - 2,532 Pass 0.89 SPW-944 4/9/2021 Gr. Alpha 56.7 +/- 2.5 58.4 29.2 - 87.6 Pass 0.97 SPW-944 4/9/2021 Gr. Beta 35.1 +/- 1.3 38.1 30.5 - 45.7 Pass 0.92 SPW-1048 4/15/2021 H-3 1,915 +/- 152 2,110 1,688 - 2,532 Pass 0.91 SPW-1250 4/30/2021 H-3 2,015 +/- 154 2,110 1,688 - 2,532 Pass 0.95 SPW-1373 5/11/2021 Gr. Alpha 63.5 +/- 2.9 58.4 29.2 - 87.6 Pass 1.09 SPW-1373 5/11/2021 Gr. Beta 38.5 +/- 1.3 38.1 30.5 - 45.7 Pass 1.01 SPW-1377 5/11/2021 Sr-90 17.4 +/- 1.2 17.9 14.3 - 21.5 Pass 0.97 SPDW-30108 5/28/2021 H-3 2,222 +/- 161 2,110 1,688 - 2,532 Pass 1.05 SPDW-30125 5/13/2021 Ra-226 10.9 +/- 0.3 12.3 8.6 - 16.0 Pass 0.89 SPDW-30118 6/4/2021 H-3 2,230 +/- 163 2,110 1,688 - 2,532 Pass 1.06 SPMI-1672 6/8/2021 Sr-90 14.2 +/- 0.9 13.6 10.9 - 16.3 Pass 1.04 SPDW-30160 6/11/2021 Ra-226 11.4 +/- 0.3 12.3 8.6 - 16.0 Pass 0.93 SPDW-30129 6/15/2021 H-3 2,238 +/- 162 2,110 1,688 - 2,532 Pass 1.06 SPDW-30134 6/18/2021 Gr. Alpha 17.9 +/- 1.4 23.5 11.8 - 35.3 Pass 0.76 SPDW-30134 6/18/2021 Gr. Beta 60.9 +/- 1.6 67.6 54.1 - 81.1 Pass 0.90 SPDW-30148 6/25/2021 Ra-228 15.1 +/- 2.9 15.3 10.7 - 19.9 Pass 0.98 SPDW-30206 7/8/2021 Ra-226 12.7 +/- 0.4 12.3 8.6 - 16.0 Pass 1.03 SPDW-3001 7/29/2021 Ra-226 11.6 +/- 0.3 12.3 8.6 - 16.0 Pass 0.95 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

Enclosure I TABLE A-4. Intralaboratory "Spiked" Samples Concentrationa b

Lab Code Date Analysis Laboratory results Known Control Ratio 2s, n=1c Activity Limitsd Acceptance Lab/Known SPDW-30224 8/2/2021 Gr. Alpha 38.6 +/- 2.1 49.1 24.6 - 73.7 Pass 0.79 SPDW-30224 8/2/2021 Gr. Beta 27.8 +/- 1.2 31.5 25.2 - 37.8 Pass 0.88 SPDW-30226 8/13/2021 H-3 2,074 +/- 157 2,110 1,688 - 2,532 Pass 0.98 SPDW-30231 8/18/2021 Ra-228 14.5 +/- 2.2 15.3 10.7 - 19.9 Pass 0.95 SPW-2783 9/3/2021 Sr-90 18.9 +/- 1.2 17.1 13.7 - 20.5 Pass 1.10 SPDW-2785 9/3/2021 H-3 2,135 +/- 158 2,110 1,688 - 2,532 Pass 1.01 SPDW-2891 9/10/2021 H-3 2,159 +/- 160 2,110 1,688 - 2,532 Pass 1.02 SPDW-3115 9/17/2021 Ra-226 11.3 +/- 0.3 12.3 8.6 - 16.0 Pass 0.92 SPDW-3036 9/23/2021 Ra-228 18.0 +/- 2.6 15.3 10.7 - 19.9 Pass 1.17 SPDW-3223 9/28/2021 Ra-228 16.6 +/- 2.5 15.3 10.7 - 19.9 Pass 1.08 SPDW-3288 9/29/2021 U-234 29.2 +/- 1.6 23.0 16.1 - 29.9 Pass 1.27 SPDW-3288 9/29/2021 U-238 28.2 +/- 1.6 23.2 16.3 - 30.2 Pass 1.21 SPDW-30276 9/29/2021 Ra-226 9.4 +/- 0.4 12.3 8.6 - 16.0 Pass 0.76 SPDW-3157 10/1/2021 H-3 2,111 +/- 158 2,110 1,688 - 2,532 Pass 1.00 SPDW-3290 10/12/2021 Gr. Alpha 34.6 +/- 2.1 49.1 24.6 - 73.7 Pass 0.70 SPDW-3290 10/12/2021 Gr. Beta 25.1 +/- 1.1 31.5 25.2 - 37.8 Pass 0.80 SPDW-3393 10/15/2021 H-3 2,184 +/- 161 2,110 1,688 - 2,532 Pass 1.04 SPDW-3604 10/28/2021 H-3 2,104 +/- 15 2,110 1,688 - 2,532 Pass 1.00 SPDW-30283 11/4/2021 Ra-226 11.7 +/- 0.3 12.3 8.6 - 16.0 Pass 0.95 SPDW-3769 11/10/2021 H-3 2,026 +/- 156 2,110 1,688 - 2,532 Pass 0.96 SPDW-3860 11/18/2021 H-3 2,161 +/- 161 2,110 1,688 - 2,532 Pass 1.02 SPDW-30290 11/22/2021 Ra-226 12.0 +/- 0.3 12.3 8.6 - 16.0 Pass 0.97 SPDW-3958 12/3/2021 H-3 2,126 +/- 160 2,110 1,688 - 2,532 Pass 1.01 SPW-3971 12/7/2021 Sr-90 19.0 +/- 1.2 17.1 13.7 - 20.5 Pass 1.11 SPDW-30287 12/9/2021 Ra-228 12.3 +/- 1.7 15.3 10.7 - 19.9 Pass 0.80 SPDW-30295 12/16/2021 H-3 2,265 +/- 163 2,110 1,688 - 2,532 Pass 1.07 SPDW-30301 12/30/2021 H-3 2,055 +/- 163 2,110 1,688 - 2,532 Pass 0.97 SPDW-30307 12/13/2021 Ra-226 11.7 +/- 0.4 12.3 8.6 - 16.0 Pass 0.95 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

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

SPW-54 Water 1/8/2021 H-3 153 24 +/- 77 200 SPDW-61 Water 1/11/2021 Gr. Alpha 0.56 -0.32 +/- 0.37 2 SPDW-61 Water 1/11/2021 Gr. Beta 0.73 -0.11 +/- 0.49 4 SPW-130 Water 1/19/2021 Sr-89 0.66 -0.12 +/- 0.49 5 SPW-130 Water 1/19/2021 Sr-90 0.68 -0.02 +/- 0.31 1 SPW-132 Water 1/19/2021 H-3 165 38 +/- 79 200 SPW-4923 Water 1/26/2021 I-131 0.28 0.26 +/- 0.16 1 SPW-187 Water 1/18/2021 Ra-228 1.44 0.81 +/- 0.76 2 SPW-235 Water 1/26/2021 Ra-228 1.54 0.94 +/- 0.82 2 SPW-254 Water 2/2/2021 I-131 0.29 -0.06 +/- 0.13 1 SPW-304 Water 2/5/2021 H-3 159 6 +/- 74 200 SPW-371 Water 2/12/2021 H-3 154 -37 +/- 70 200 SPW-525 Water 3/5/2021 H-3 160 97 +/- 80 200 SPW-691 Water 3/19/2021 H-3 158 -38 +/- 71 200 SPW-693 Water 1/4/2021 Ra-226 0.03 -0.01 +/- 0.01 2 SPW-799 Water 3/30/2021 Ra-228 1.03 0.06 +/- 0.48 2 SPW-809 Water 3/19/2021 Ra-226 0.04 0.01 +/- 0.03 2 SPDW-30102 Water 3/31/2021 Ra-226 0.03 0.00 +/- 0.03 2 SPW-811 Water 4/1/2021 H-3 158 -29 +/- 77 200 SPW-918 Water 4/7/2021 H-3 156 93 +/- 79 200 SPW-943 Water 4/9/2021 Gr. Alpha 0.39 -0.08 +/- 0.27 2 SPW-943 Water 4/9/2021 Gr. Beta 0.73 0.04 +/- 0.51 4 SPW-1047 Water 4/15/2021 H-3 160 -51 +/- 74 200 SPW-1249 Water 4/30/2021 H-3 158 109 +/- 81 200 SPW-1372 Water 5/11/2021 Gr. Alpha 0.35 0.27 +/- 0.27 2 SPW-1372 Water 5/11/2021 Gr. Beta 0.68 0.27 +/- 0.49 4 SPW-1376 Water 5/11/2021 Sr-89 0.52 0.23 +/- 0.39 5 SPW-1376 Water 5/11/2021 Sr-90 0.51 -0.06 +/- 0.23 1 SPDW-30124 Water 5/13/2021 Ra-226 0.03 -0.02 +/- 0.03 2 SPDW-30104 Water 5/26/2021 Ra-228 1.30 -0.04 +/- 0.60 2 SPDW-30107 Water 5/28/2021 H-3 157 33 +/- 76 200 SPDW-30117 Water 6/4/2021 H-3 165 67 +/- 81 200 SPMI-1671 Milk 6/8/2021 Sr-89 0.46 0.23 +/- 0.42 5 SPMI-1671 Milk 6/8/2021 Sr-90 0.45 0.23 +/- 0.24 1 SPDW-30159 Water 6/11/2021 Ra-226 0.04 -0.02 +/- 0.04 2 SPDW-30128 Water 6/15/2021 H-3 161 17 +/- 76 200 SPDW-30133 Water 6/17/2021 I-131 0.20 0.06 +/- 0.12 1 SPDW-30134 Water 6/18/2021 Gr. Alpha 0.46 -0.11 +/- 0.32 2 SPDW-30134 Water 6/18/2021 Gr. Beta 0.70 -0.10 +/- 0.49 4 SPDW-30147 Water 6/25/2021 Ra-228 1.76 -0.15 +/- 0.80 2 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-8

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

SPDW-30205 Water 7/8/2021 Ra-226 0.03 0.02 +/- 0.03 2 SPDW-3000 Water 7/29/2021 Ra-226 0.03 0.03 +/- 0.03 2 SPDW-30223 Water 8/2/2021 Gr. Alpha 0.46 -0.13 +/- 0.31 2 SPDW-30223 Water 8/2/2021 Gr. Beta 0.70 0.16 +/- 0.49 4 SPDW-30225 Water 8/13/2021 H-3 161 -2 +/- 75 200 SPDW-30230 Water 8/18/2021 Ra-228 1.02 0.47 +/- 0.53 2 SPW-2782 Water 9/3/2021 Sr-89 0.60 -0.16 +/- 0.48 5 SPW-2782 Water 9/3/2021 Sr-90 0.63 0.20 +/- 0.32 1 SPDW-2784 Water 9/3/2021 H-3 157 -50 +/- 69 200 SPDW-2890 Water 9/10/2021 H-3 163 -59 +/- 72 200 SPDW-2981 Water 9/17/2021 H-3 162 11 +/- 78 200 SPDW-3114 Water 9/17/2021 Ra-226 0.03 0.04 +/- 0.03 2 SPDW-3035 Water 9/23/2021 Ra-228 1.15 0.10 +/- 0.55 2 SPDW-3222 Water 9/28/2021 Ra-228 1.37 -0.30 +/- 0.60 2 SPDW-3287 Water 9/29/2021 U-234 0.22 0.19 +/- 0.23 1 SPDW-3287 Water 9/29/2021 U-238 0.38 -0.05 +/- 0.21 1 SPDW-30275 Water 9/29/2021 Ra-226 0.05 0.03 +/- 0.04 2 SPDW-3156 Water 10/1/2021 H-3 161 -11 +/- 75 200 SPDW-3289 Water 10/12/2021 Gr. Alpha 0.40 0.21 +/- 0.30 2 SPDW-3289 Water 10/12/2021 Gr. Beta 0.72 0.31 +/- 0.52 4 SPDW-3392 Water 10/15/2021 H-3 158 58 +/- 79 200 SPDW-3603 Water 10/28/2021 H-3 163 26 +/- 77 200 SPDW-30282 Water 11/4/2021 Ra-226 0.04 0.04 +/- 0.03 2 SPDW-3768 Water 11/10/2021 H-3 162 31 +/- 77 200 SPDW-3859 Water 11/18/2021 H-3 162 45 +/- 78 200 SPDW-30289 Water 11/22/2021 Ra-226 0.03 0.19 +/- 0.03 2 SPDW-3957 Water 12/3/2021 H-3 161 118 +/- 84 200 SPW-3970 Water 12/7/2021 Sr-89 0.54 -0.12 +/- 0.43 5 SPW-3970 Water 12/7/2021 Sr-90 0.54 0.08 +/- 0.26 1 SPDW-30286 Water 12/9/2021 Ra-228 0.91 -0.26 +/- 0.39 2 SPDW-30288 Water 12/10/2021 I-131 0.22 0.00 +/- 0.12 1 SPDW-30306 Water 12/13/2021 Ra-226 0.05 -0.05 +/- 0.04 2 SPDW-30294 Water 12/16/2021 H-3 162 -33 +/- 73 200 SPDW-30300 Water 12/30/2021 H-3 166 68 +/- 91 200 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

Enclosure I TABLE A-6. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance S-20,21 1/5/2021 K-40 23.3 +/- 0.6 22.6 +/- 1.6 23.0 +/- 0.9 Pass XW-295,296 1/13/2021 H-3 245 +/- 87 288 +/- 89 267 +/- 62 Pass S-143,144 1/14/2021 K-40 7.47 +/- 0.76 8.38 +/- 0.22 7.93 +/- 0.40 Pass S-360,361 2/10/2021 K-40 9.23 +/- 0.54 9.00 +/- 0.68 9.12 +/- 0.43 Pass S-406,407 2/15/2021 K-40 2.92 +/- 0.28 2.94 +/- 0.94 2.93 +/- 0.49 Pass W-469,470 2/22/2021 Ra-226 0.75 +/- 0.21 0.87 +/- 0.22 0.81 +/- 0.15 Pass W-448,449 2/25/2021 Gr. Alpha 3.52 +/- 1.84 3.72 +/- 1.87 3.62 +/- 1.31 Pass W-448,449 2/25/2021 Gr. Beta 8.71 +/- 1.36 8.91 +/- 1.40 8.81 +/- 0.98 Pass W-448,449 2/25/2021 Ra-226 1.87 +/- 0.25 1.82 +/- 0.28 1.85 +/- 0.19 Pass W-448,449 2/25/2021 Ra-228 2.65 +/- 1.26 2.53 +/- 1.35 2.59 +/- 0.92 Pass P-511,512 3/2/2021 H-3 198 +/- 85 202 +/- 86 200 +/- 60 Pass WW-630,631 3/10/2021 H-3 144 +/- 82 148 +/- 82 146 +/- 58 Pass WW-743,744 3/16/2021 H-3 183 +/- 85 167 +/- 84 175 +/- 60 Pass S-785,786 3/25/2021 Pb-214 0.59 +/- 0.08 0.34 +/- 0.05 0.47 +/- 0.05 Pass S-785,786 3/25/2021 Ac-228 0.61 +/- 0.12 0.58 +/- 0.13 0.60 +/- 0.09 Pass AP-1052,1053 3/30/2021 Be-7 0.081 +/- 0.010 0.075 +/- 0.011 0.078 +/- 0.007 Pass AP-966,967 3/30/2021 Be-7 0.080 +/- 0.010 0.085 +/- 0.009 0.083 +/- 0.007 Pass SWU-835,836 3/30/2021 Gr. Beta 1.22 +/- 0.56 1.27 +/- 0.55 1.24 +/- 0.39 Pass AP-1204,1205 3/30/2021 Be-7 0.187 +/- 0.102 0.160 +/- 0.088 0.173 +/- 0.067 Pass AP-1029,1030 4/2/2021 Be-7 0.067 +/- 0.012 0.079 +/- 0.012 0.073 +/- 0.009 Pass SW-922,923 4/7/2021 H-3 440 +/- 99 307 +/- 93 373 +/- 68 Pass WW-987,988 4/12/2021 H-3 190 +/- 87 284 +/- 92 237 +/- 63 Pass F-1246,1247 4/22/2021 K-40 3.26 +/- 0.66 2.83 +/- 0.46 3.04 +/- 0.40 Pass SWT-1311,1312 4/27/2021 Gr. Beta 1.05 +/- 0.52 1.16 +/- 0.55 1.10 +/- 0.38 Pass WW-1401,1402 5/5/2021 Gr. Alpha 1.10 +/- 1.00 2.50 +/- 1.20 1.80 +/- 0.78 Pass WW-1401,1402 5/5/2021 K-40 126 +/- 15 105 +/- 30 115 +/- 17 Pass DW-30071.,30072 5/6/2021 Ra-226 0.98 +/- 0.15 0.67 +/- 0.13 0.83 +/- 0.10 Pass DW-30071.,30072 5/6/2021 Ra-228 0.83 +/- 0.51 1.21 +/- 0.54 1.02 +/- 0.37 Pass DW-30078,30079 5/10/2021 Gr. Alpha 4.90 +/- 0.92 5.92 +/- 0.99 5.41 +/- 0.68 Pass AP-051120A,B 5/11/2021 Gr. Beta 0.006 +/- 0.002 0.005 +/- 0.002 0.005 +/- 0.002 Pass DW-30083,30084 5/11/2021 Ra-226 0.34 +/- 0.13 0.19 +/- 0.20 0.27 +/- 0.12 Pass DW-30083,30084 5/11/2021 Ra-228 0.98 +/- 0.60 0.15 +/- 0.56 0.57 +/- 0.41 Pass S-1506,1507 5/18/2021 K-40 10.1 +/- 0.8 14.9 +/- 1.2 12.5 +/- 0.7 Pass DW-30092,30093 5/20/2021 Gr. Alpha 2.86 +/- 0.85 2.40 +/- 0.90 2.63 +/- 0.62 Pass DW-30095,30096 5/21/2021 Ra-226 1.18 +/- 0.16 0.73 +/- 0.15 0.96 +/- 0.11 Pass DW-30095,30096 5/21/2021 Ra-228 1.44 +/- 0.63 0.61 +/- 0.59 1.03 +/- 0.43 Pass AP-052521A,B 5/25/2021 Gr. Beta 0.021 +/- 0.003 0.022 +/- 0.003 0.021 +/- 0.002 Pass S-1589,1590 5/28/2021 Pb-214 1.16 +/- 0.08 1.06 +/- 0.09 1.11 +/- 0.06 Pass S-1589,1590 5/28/2021 Ac-228 1.17 +/- 0.18 1.08 +/- 0.14 1.13 +/- 0.11 Pass A-10

Enclosure I TABLE A-6. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance AP-060121A,B 6/1/2021 Gr. Beta 0.015 +/- 0.003 0.013 +/- 0.003 0.014 +/- 0.002 Pass DW-30113,30114 6/1/2021 Ra-226 2.00 +/- 0.34 2.64 +/- 0.26 2.32 +/- 0.21 Pass DW-30113,30114 6/1/2021 Ra-228 2.50 +/- 0.78 3.13 +/- 0.82 2.82 +/- 0.57 Pass PS-1631,1632 6/2/2021 K-40 21.1 +/- 0.8 20.4 +/- 0.8 20.7 +/- 0.6 Pass DW-30119,30120 6/3/2021 Gr. Alpha 1.18 +/- 0.75 0.66 +/- 0.64 0.92 +/- 0.49 Pass WW-1908,1909 6/4/2021 H-3 150 +/- 85 176 +/- 87 163 +/- 61 Pass VE-1717,1718 6/7/2021 Be-7 0.50 +/- 0.19 0.38 +/- 0.14 0.44 +/- 0.12 Pass VE-1717,1718 6/7/2021 K-40 5.26 +/- 0.47 5.45 +/- 0.44 5.35 +/- 0.32 Pass AP-060821A,B 6/8/2021 Gr. Beta 0.030 +/- 0.004 0.028 +/- 0.004 0.029 +/- 0.003 Pass AP-1822,1823 6/10/2021 Be-7 0.23 +/- 0.12 0.22 +/- 0.12 0.22 +/- 0.08 Pass CF-1844,1845 6/14/2021 K-40 8.37 +/- 0.44 8.33 +/- 0.35 8.35 +/- 0.28 Pass AP-061521A,B 6/15/2021 Gr. Beta 0.020 +/- 0.004 0.017 +/- 0.003 0.019 +/- 0.002 Pass DW-30131,30132 6/17/2021 Ra-226 0.41 +/- 0.21 0.34 +/- 0.23 0.38 +/- 0.16 Pass DW-30131,30132 6/17/2021 Ra-228 0.42 +/- 0.85 0.52 +/- 0.74 0.47 +/- 0.56 Pass DW-30138,30139 6/17/2021 Gr. Alpha 1.59 +/- 0.84 2.21 +/- 0.95 1.90 +/- 0.63 Pass S-1929,1930 6/22/2021 K-40 19.4 +/- 1.0 19.2 +/- 1.1 19.3 +/- 0.7 Pass AP-062221A,B 6/22/2021 Gr. Beta 0.014 +/- 0.003 0.012 +/- 0.028 0.013 +/- 0.014 Pass DW-30150,30151 6/28/2021 Ra-226 0.53 +/- 0.15 0.55 +/- 0.19 0.54 +/- 0.12 Pass DW-30150,30151 6/28/2021 Ra-228 0.76 +/- 0.54 0.52 +/- 0.52 0.64 +/- 0.37 Pass AP-2160,2161 6/28/2021 Be-7 0.11 +/- 0.01 0.11 +/- 0.01 0.11 +/- 0.01 Pass DW-30150,30151 6/28/2021 Ra-226 0.53 +/- 0.15 0.55 +/- 0.19 0.54 +/- 0.12 Pass DW-30150,30151 6/28/2021 Ra-228 0.76 +/- 0.54 0.52 +/- 0.52 0.64 +/- 0.37 Pass AP-2218,2119 6/29/2021 Be-7 0.11 +/- 0.01 0.12 +/- 0.01 0.11 +/- 0.01 Pass AP-2235,2236 6/30/2021 Be-7 0.10 +/- 0.01 0.11 +/- 0.01 0.10 +/- 0.01 Pass CF-2139,2140 7/12/2021 Be-7 0.49 +/- 0.12 0.65 +/- 0.20 0.57 +/- 0.12 Pass CF-2139,2140 7/12/2021 K-40 8.25 +/- 0.41 7.94 +/- 0.46 8.10 +/- 0.31 Pass VE-2214,2215 7/12/2021 K-40 3.26 +/- 0.11 3.41 +/- 0.25 3.34 +/- 0.14 Pass DW-30169,30170 7/12/2021 Gr. Alpha 2.61 +/- 0.87 2.09 +/- 0.84 2.35 +/- 0.60 Pass DW-30169,30170 7/12/2021 Gr. Beta 2.09 +/- 0.67 2.52 +/- 0.60 2.31 +/- 0.45 Pass DW-30169,30170 7/12/2021 Ra-226 0.84 +/- 0.24 0.82 +/- 0.20 0.83 +/- 0.16 Pass DW-30169,30170 7/12/2021 Ra-228 0.80 +/- 0.54 0.84 +/- 0.50 0.82 +/- 0.37 Pass AP-71320,71321 7/13/2021 Gr. Beta 0.015 +/- 0.003 0.010 +/- 0.003 0.013 +/- 0.002 Pass XW-2424,2425 7/16/2021 H-3 193 +/- 86 104 +/- 81 149 +/- 59 Pass DW-30183,30184 7/19/2021 Ra-226 1.37 +/- 0.18 1.21 +/- 0.27 1.29 +/- 0.16 Pass DW-30183,30185 7/19/2021 Ra-228 1.51 +/- 0.69 1.52 +/- 0.68 1.52 +/- 0.48 Pass AP-71920,71921 7/19/2021 Gr. Beta 0.021 +/- 0.004 0.020 +/- 0.003 0.021 +/- 0.002 Pass S-2277,2278 7/20/2021 K-40 13.6 +/- 0.9 12.3 +/- 0.9 12.9 +/- 0.6 Pass DW-30191,30192 7/20/2021 Gr. Alpha 3.88 +/- 0.94 3.66 +/- 94.00 3.77 +/- 47.00 Pass SG-2382,2383 7/23/2021 Pb-214 1.88 +/- 0.21 1.94 +/- 0.21 1.91 +/- 0.15 Pass SG-2382,2383 7/23/2021 Ac-228 1.69 +/- 0.28 1.96 +/- 0.33 1.83 +/- 0.22 Pass DW-30207,30208 7/26/2021 Gr. Alpha 5.47 +/- 1.29 5.20 +/- 1.24 5.34 +/- 0.89 Pass DW-30207,30208 7/26/2021 Gr. Beta 5.89 +/- 0.77 6.11 +/- 0.73 6.00 +/- 0.53 Pass A-11

Enclosure I TABLE A-6. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance DW-30210,30211 7/28/2021 Ra-226 0.48 +/- 0.13 0.62 +/- 0.11 0.55 +/- 0.09 Pass DW-30210,30211 7/28/2021 Ra-228 0.45 +/- 0.53 0.73 +/- 0.65 0.59 +/- 0.42 Pass S-2509,2510 8/1/2021 K-40 14.2 +/- 0.5 13.7 +/- 1.0 14.0 +/- 0.6 Pass S-2509,2510 8/1/2021 Be-7 7.27 +/- 0.29 7.97 +/- 0.69 7.62 +/- 0.37 Pass DW-30221,30222 8/6/2021 Gr. Alpha 2.19 +/- 1.55 2.08 +/- 1.54 2.14 +/- 1.09 Pass DW-30221,30222 8/6/2021 Gr. Beta 1.19 +/- 1.04 2.76 +/- 1.08 1.98 +/- 0.75 Pass DW-30221,30222 8/6/2021 Ra-226 2.00 +/- 0.22 1.58 +/- 0.26 1.79 +/- 0.17 Pass DW-30221,30222 8/6/2021 Ra-228 1.69 +/- 0.56 1.75 +/- 0.54 1.72 +/- 0.39 Pass VE-2551,2552 8/11/2021 K-40 2.68 +/- 0.20 2.61 +/- 0.27 2.64 +/- 0.17 Pass VE-2551,2552 8/11/2021 Be-7 0.16 +/- 0.08 0.18 +/- 0.08 0.17 +/- 0.05 Pass AP-2578,2579 8/12/2021 Be-7 0.18 +/- 0.09 0.20 +/- 0.11 0.19 +/- 0.07 Pass AP-082421A,B 8/24/2021 Gr. Beta 0.032 +/- 0.004 0.028 +/- 0.004 0.030 +/- 0.003 Pass AP-083121A,B 8/24/2021 Gr. Beta 0.027 +/- 0.004 0.029 +/- 0.004 0.028 +/- 0.003 Pass VE-2684,2685 8/25/2021 K-40 2.15 +/- 0.26 1.92 +/- 0.27 2.03 +/- 0.19 Pass VE-2684,2685 8/25/2021 Be-7 0.20 +/- 0.10 0.26 +/- 0.11 0.23 +/- 0.07 Pass VE-2728,2729 8/25/2021 K-40 2.34 +/- 0.41 2.27 +/- 0.40 2.31 +/- 0.29 Pass DW-30238,30239 8/25/2021 Gr. Alpha 3.94 +/- 0.91 2.43 +/- 0.86 3.185 +/- 0.63 Pass DW-30238,30239 8/25/2021 Ra-226 2.57 +/- 0.24 1.83 +/- 0.24 2.20 +/- 0.17 Pass DW-30238,30239 8/25/2021 Ra-228 2.86 +/- 0.83 2.52 +/- 0.66 2.69 +/- 0.53 Pass SW-2641,2642 8/31/2021 H-3 289 +/- 92 310 +/- 93 300 +/- 65 Pass VE-2858,2859 9/2/2021 K-40 8.36 +/- 0.41 8.02 +/- 0.47 8.19 +/- 0.31 Pass SG-2934,2935 9/13/2021 Pb-214 2.72 +/- 0.22 2.54 +/- 0.27 2.63 +/- 0.17 Pass SG-2934,2935 9/13/2021 Ac-228 3.16 +/- 0.39 3.22 +/- 0.58 3.19 +/- 0.35 Pass DW-30249,30250 9/17/2021 Ra-226 0.70 +/- 0.18 1.00 +/- 0.17 0.85 +/- 0.12 Pass S-3042,3043 9/22/2021 K-40 7.55 +/- 0.80 7.57 +/- 0.81 7.56 +/- 0.57 Pass DW-30249,30250 9/17/2021 Ra-226 0.70 +/- 0.18 1.00 +/- 0.17 0.85 +/- 0.12 Pass S-3042,3043 9/22/2021 K-40 7.55 +/- 0.80 7.57 +/- 0.81 7.56 +/- 0.57 Pass DW-30256,30257 10/8/2021 Gr. Alpha 2.35 +/- 0.79 2.71 +/- 0.92 2.53 +/- 0.61 Pass S-3279,3280 10/11/2021 K-40 10.08 +/- 0.58 9.18 +/- 0.53 9.63 +/- 0.39 Pass DW-30262,30263 10/14/2021 Ra-226 1.49 +/- 0.30 1.51 +/- 0.17 1.50 +/- 0.17 Pass DW-30262,30263 10/14/2021 Ra-228 1.16 +/- 0.79 2.08 +/- 0.82 1.62 +/- 0.57 Pass AP-102521A,B 10/25/2021 Gr. Beta 0.026 +/- 0.005 0.030 +/- 0.010 0.028 +/- 0.010 Pass XWW-3707,3708 10/27/2021 H-3 206 +/- 87 268 +/- 90 237 +/- 63 Pass AP-110121A,B 11/1/2021 Gr. Beta 0.017 +/- 0.004 0.016 +/- 0.00 0.016 +/- 0.003 Pass DW-30277,30278 11/5/2021 Gr. Alpha 10.11 +/- 1.19 9.72 +/- 1.11 9.92 +/- 0.81 Pass DW-30277,30278 11/5/2021 Gr .Beta 5.53 +/- 0.72 4.22 +/- 0.69 4.88 +/- 0.50 Pass DW-30277,30278 11/5/2021 Ra-226 6.27 +/- 0.32 6.34 +/- 0.37 6.31 +/- 0.25 Pass DW-30277,30278 11/5/2021 Ra-228 3.10 +/- 0.86 3.76 +/- 0.90 3.43 +/- 0.62 Pass AP-111521A,B 11/15/2021 Gr. Beta 0.022 +/- 0.004 0.026 +/- 0.005 0.024 +/- 0.003 Pass AP-112221A,B 11/22/2021 Gr. Beta 0.023 +/- 0.004 0.025 +/- 0.005 0.024 +/- 0.003 Pass AP-112921A,B 11/29/2021 Gr. Beta 0.038 +/- 0.005 0.035 +/- 0.005 0.037 +/- 0.004 Pass A-12

Enclosure I TABLE A-6. Intralaboratory "Duplicate" Samples Concentrationa Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance DW-30297,8 12/15/2021 Ra-226 1.71 +/- 0.15 1.21 +/- 0.13 1.46 +/- 0.10 Pass DW-30297,8 12/15/2021 Ra-228 2.44 +/- 0.98 1.96 +/- 0.97 2.20 +/- 0.69 Pass S-4182,4183 12/19/2021 Pb-214 1.19 +/- 0.06 1.07 +/- 0.08 1.13 +/- 0.05 Pass S-4182,4183 12/19/2021 Ac-228 1.08 +/- 0.11 1.15 +/- 0.14 1.12 +/- 0.09 Pass S-4182,4183 12/19/2021 K-40 1.75 +/- 0.74 1.80 +/- 0.84 1.78 +/- 0.56 Pass AP-122721A,B 12/27/2021 Gr. Beta 0.063 +/- 0.006 0.060 +/- 0.006 0.062 +/- 0.004 Pass AP-4350,4351 12/28/2021 Be-7 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.01 Pass AP-4845,4846 12/31/2021 Be-7 0.07 +/- 0.01 0.06 +/- 0.02 0.06 +/- 0.01 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), VE (Vegetation), W (Water), WW (Well Water).

A-13

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

Concentrationa Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-594 2/1/2021 Gross Alpha 1.30 +/- 0.08 1.77 0.53 - 3.01 Pass MAAP-594 2/1/2021 Gross Beta 0.81 +/- 0.04 0.649 0.325 - 0.974 Pass MADW-571 2/1/2021 Gross Alpha 0.73 +/- 0.06 0.87 0.26 - 1.48 Pass MADW-572 2/1/2021 Gross Beta 2.38 +/- 0.06 2.50 1.25 - 3.75 Pass MASO-591 2/1/2021 Cs-134 -2.57 +/- 2.21 0 NA c Pass MASO-591 2/1/2021 Cs-137 1700 +/- 20 1550 1085 - 2015 Pass MASO-591 2/1/2021 Co-57 977 +/-7 920 644 - 1196 Pass MASO-591 2/1/2021 Co-60 1360 +/- 10 1370 959 - 1781 Pass MASO-591 2/1/2021 Mn-54 0.91 +/- 2.85 0 NA c Pass MASO-591 2/1/2021 Zn-65 687 - 17 604 423 - 785 Pass MASO-591 2/1/2021 K-40 682 +/- 53 618 433 - 803 Pass MAW-569 2/1/2021 Cs-134 10.5 +/- 0.3 11.5 8.1 - 15.0 Pass MAW-569 2/1/2021 Cs-137 8.53 +/- 0.32 7.9 5.5 - 10.3 Pass MAW-569 2/1/2021 Co-57 12.2 +/- 0.3 11.4 8.0 - 14.8 Pass MAW-569 2/1/2021 Co-60 0.03 +/- 0.05 0 NA c Pass MAW-569 2/1/2021 Mn-54 16.5 +/- 0.4 15.5 10.9 - 20.2 Pass MAW-569 2/1/2021 Zn-65 11.5 +/- 0.5 10.5 7.40 - 13.7 Pass MAW-569 2/1/2021 K-40 9.93 +/- 1.42 0 NA c Fail d MAAP-592 2/1/2021 Cs-134 1.54 +/- 0.06 2.14 1.50 - 2.78 Pass MAAP-592 2/1/2021 Cs-137 -0.011 +/- 0.020 0 NA c Pass MAAP-592 2/1/2021 Co-57 0.636 +/- 0.042 0.69 0.480 - 0.892 Pass MAAP-592 2/1/2021 Co-60 -0.64 +/- 0.02 0 NA c Fail e MAAP-592 2/1/2021 Mn-54 0.312 +/- 0.058 0.312 0.218 - 0.406 Pass MAAP-592 2/1/2021 Zn-65 0.41 +/- 0.07 0.352 0.246 - 0.458 Pass MAVE-588 2/1/2021 Cs-134 3.73 +/- 0.09 3.60 2.50 - 4.70 Pass MAVE-588 2/1/2021 Cs-137 5.69 +/- 0.10 4.69 3.28 - 6.10 Pass MAVE-588 2/1/2021 Co-57 6.23 +/- 0.07 5.05 3.54 - 6.57 Pass MAVE-588 2/1/2021 Co-60 3.29 +/- 0.06 2.99 2.09 - 3.89 Pass MAVE-588 2/1/2021 Mn-54 6.17 +/- 0.16 5.25 3.68 - 6.83 Pass MAVE-588 2/1/2021 Zn-65 -0.04 +/- 0.08 0 NA c Pass MAAP-3007 8/1/2021 Gross Alpha 0.45 +/- 0.04 0.960 0.288 - 1.632 Pass MAAP-3007 8/1/2021 Gross Beta 0.71 +/- 0.04 0.553 0.277 - 0.830 Pass MADW-2688 8/1/2021 Gross Alpha 0.19 +/- 0.03 0.232 0.070 - 0.394 Pass MADW-2688 8/1/2021 Gross Beta 2.60 +/- 0.06 2.807 1.404 - 4.211 Pass A-14

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

Concentrationa Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MASO-3004 8/1/2021 Cs-134 1035 +/- 10 1170 819 - 1521 Pass MASO-3004 8/1/2021 Cs-137 628 +/- 11 572 400 - 744 Pass MASO-3004 8/1/2021 Co-57 -0.11 +/- 1.26 0 NA c Pass MASO-3004 8/1/2021 Co-60 720 +/- 7 722 714 - 1326 Pass MASO-3004 8/1/2021 Mn-54 456 +/- 11 410 287 - 533 Pass MASO-3004 8/1/2021 Zn-65 1002 +/- 22 907 635 - 1179 Pass MASO-3004 8/1/2021 K-40 663 +/- 50 607 425 - 789 Pass MADW-3003 8/1/2021 Ra-226 0.32 +/- 0.06 0.226 0.158 +/- 0.294 Failf MADW-3003 8/1/2021 Sr-90 3.63 +/- 0.16 3.9 2.70 - 5.02 Pass MADW-3003 8/1/2021 U-234 0.02 - 0.01 0.02 NA g Pass MADW-3003 8/1/2021 U-238 0.02 - 0.01 0.01 NA g 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 The sample spectrum was reanalyzed utilizing the minimum data point background width method. The result was 1.59 +/- 1.77 Bq/L which satisfies MAPEP criteria for a false positive test.

e A decimal was misplaced in one of two cobalt-60 results while calculating a mean result causing MAPEP to fail the result as a statistically significant negative value at 3 standard deviations. The correct mean result (-0.0004 +/- 0.0186) is not a statistically significant negative value and would not have failed.

f Radium result did not meet MAPEP acceptance criteria.

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

A-15

Enclosure I TABLE A-8. 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-722 3/22/2021 Cs-134 898 1030 668 - 1260 Pass ERAP-722 3/22/2021 Cs-137 181 163 134 - 214 Pass ERAP-722 3/22/2021 Co-60 1270 1220 1040 - 1550 Pass ERAP-722 3/22/2021 Mn-54 < 4.3 < 50.0 0.00 - 50.0 Pass ERAP-722 3/22/2021 Zn-65 908 771 632 - 1180 Pass ERAP-722 3/22/2021 Sr-90 184 189 120 - 257 Pass ERAP-724 3/22/2021 Gross Alpha 88.4 96.1 50.2 - 158 Pass ERAP-724 3/22/2021 Gross Beta 74.1 62.6 38.0 - 94.6 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-16

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

Enclosure I 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 2021 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 (312) 0.01 0.028 (259/259) 49 0.029 (53/53) 0.028 (53/53) 0 (0.010 - 0.071) 0.8 miles NNE (0.012 - 0.064) (0.011 - 0.063)

Air Radioiodine (pCi/m3) Gamma (24) - 0.092 (20/20) 2 0.096 (4/4) 0.086 (4/4) 0 Be-7 (0.066 - 0.120) 2.7 miles N (0.072 - 0.119) (0.064 - 0.115)

Station 53 I-131 (312) 0.07 - (0/259) N/A N/A - (0/53) 0 Direct Radiation Stations 39 & 53 Dosimeters (mR per std. Gamma Dose - 15.6 (160/160) 22 18.4 (4/4) 15.1 (8/8) 0 90-day Qtr.) (176) (0.8 - 24.3) 3.9 miles SSW (6.7 - 24.3) (4.1 - 20.8)

Surface Water JRR (pCi/l) Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (24) 30,000 11,817 (12/12) SP 11,817 (12/12) - (0/12) 0 (13,457 - 3.2 miles SSE (13,457 -

15,543) 15,543)

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)

Enclosure I 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 2021 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 2.9 (12/12) IO-DW 2.9 (12/12) 2.8 (12/12) 0 (1.8 - 3.7) 26.1 miles SSE (1.8 - 3.7) (2.0 - 3.9)

Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (8) 2,000 - (0/4) N/A - (0/4) - (0/4) 0 Shoreline Gamma (4) JRR Sediment (pCi/kg dry) K-40 - 7,686 (4/4) JRR 8,941 (2/2) 8,941 (2/2) 0 (5,938 - 9,184) 3.6 miles W (8,697 - 9,184) (8,697 - 9,184)

Cs-137 - (0-2) N/A N/A (0-2) 0 Fish - Flesh Gamma (22) JRR (pCi/kg wet)

K-40 - 3,595 (12/12) CCL 3,595 (13/13) 3,379(10/10) 0 (2,683 - 4,695) 0.6 miles E to (2,683 - 4,695) (2,457- 3,836)

NNW Tritium (22) - 7,518 (12/12) CCL 7,518 (13/13) - (0/10) 0 (4,597 - 9,947) 0.6 miles E to (4,597 - 9,947)

NNW Page B-3

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

Enclosure I 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 2021 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 (33) D-2 Garden (pCi/kg wet) Be-7 - 927 (28/28) Q-6 986 (5/5) 1,035 (7/7) 0 (245 - 1,684) 2.4 miles NW (281 - 1,591) (411 - 1,625)

K-40 - 5,732 (18/18) A-3 6,074 (7/7) 6,160(7/7) 0 (3,234 - 8,312) 2.6 miles N (4,510 - 8,312) 3,440 - 7,767)

Crops Gamma (3) NR-U1 (pCi/kg wet)

K-40 - 9,316 (2/2) NR-D2 15,837 (1-1) 3,401 (1-1) 0 (2,794-15,837) 11.5 miles S (15,837-15,837) (3,401-3,401)

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

K-40 - 13,471 (2/2) DC 13,471 (2/2) 16,489 (2/2) 0 (12,574-18,725) 0.9 miles WNW (12,574-18,725) (14,253 - 18,725)

Cs-137 - 59.9 (2/2) DC 59.9 (2/2) - (0/2) 0 (49.7 - 60.1) 0.9 miles WNW (49.7-60.1)

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

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

Enclosure I 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 2021 Medium of ODCM All Indicator Indicator Location with Control Locations Pathway Analysis and Lower Locations Highest Annual Mean Number of Sampled Total Number of Limit of Name Nonroutine (Unit of Analysis Performed Detection ** Mean (f) Distance and ** Mean (f) ** Mean (f) Reported Measurement) (LLD) ** Range Direction ** Range ** Range Measurements **

Aquatic Gamma (3) No Control Vegetation (pCi/kg wet) Be-7 - 552 (3/3) EEA 702 (1/1) - 0 (267 - 702) 3.0 miles NNW (702 - 702)

K-40 - 3,458 (3/3) SC 4,449 (1/1) - 0 (2,797- 4,449) 0.8 miles NNW (4,449 - 4,449)

Cs-137 - - (0/4) N/A N/A - 0 Terrestrial Gamma (1) No Control Vegetation (pCi/kg wet) Be-7 - 351 (1/1) MUDS 351 (1/1) - 0 (351 - 351) 1.5 miles WNW (351 - 351)

K-40 - 2,207 (1/1) MUDS 2,207 (1/1) - 0 (2,207 - 2,207) 1.5 miles WNW (2,207 - 2,207)

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

K-40 - 11,545 (3/3) MUDS 12,042 (2/2) - 0 (10,551-13,209) 1.5 miles WNW (10,874-13,209)

Cs-137 - 157 (3/3) EEA 184 (1/1) - 0 (112-184) 3.0 miles NNW (184-184)

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

Deer/Turkey K-40 - 2,937 (2/2) A1.42 (Deer) 3,617(1/1) - 0 (2,256 - 3,617) 1.42 miles N (3,617 - 3,617)

Tritium - 639 (2/2) A1.42 (Deer) 906 (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)

Enclosure I 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 2021 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 **

(371-907) 1.42 miles N (906 - 906)

Page B-6

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

Enclosure I APPENDIX C INDIVIDUAL SAMPLE RESULTS 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

Enclosure I 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) 28-Dec-20 04-Jan-21 300 0.034 +/- 0.005 < 0.008 04-Jan-21 11-Jan-21 304 0.023 +/- 0.004 < 0.005 11-Jan-21 18-Jan-21 298 0.025 +/- 0.005 < 0.011 18-Jan-21 25-Jan-21 305 0.024 +/- 0.004 < 0.007 25-Jan-21 01-Feb-21 303 0.022 +/- 0.004 < 0.007 01-Feb-21 08-Feb-21 296 0.041 +/- 0.005 < 0.009 08-Feb-21 17-Feb-21 424 0.034 +/- 0.004 < 0.012 17-Feb-21 22-Feb-21 214 0.050 +/- 0.007 < 0.017 22-Feb-21 01-Mar-21 296 0.016 +/- 0.004 < 0.014 01-Mar-21 08-Mar-21 298 0.024 +/- 0.004 < 0.007 08-Mar-21 15-Mar-21 300 0.017 +/- 0.004 < 0.008 15-Mar-21 22-Mar-21 307 0.032 +/- 0.004 < 0.008 22-Mar-21 29-Mar-21 304 0.013 +/- 0.004 < 0.008 29-Mar-21 05-Apr-21 302 0.013 +/- 0.004 < 0.007 05-Apr-21 12-Apr-21 298 0.018 +/- 0.004 < 0.016 12-Apr-21 19-Apr-21 300 0.012 +/- 0.004 < 0.011 19-Apr-21 26-Apr-21 301 0.024 +/- 0.004 < 0.011 26-Apr-21 03-May-21 297 0.024 +/- 0.004 < 0.010 26-Apr-21 03-May-21 297 0.023 +/- 0.004 Duplicate 03-May-21 10-May-21 305 0.015 +/- 0.004 < 0.009 03-May-21 10-May-21 305 0.014 +/- 0.004 Duplicate 10-May-21 17-May-21 300 0.013 +/- 0.004 < 0.006 17-May-21 24-May-21 295 0.019 +/- 0.004 < 0.018 24-May-21 01-Jun-21 345 0.013 +/- 0.004 < 0.018 01-Jun-21 07-Jun-21 256 0.025 +/- 0.005 < 0.017 07-Jun-21 14-Jun-21 297 0.019 +/- 0.004 < 0.010 14-Jun-21 21-Jun-21 300 0.042 +/- 0.005 < 0.018 21-Jun-21 28-Jun-21 292 0.021 +/- 0.004 < 0.018 28-Jun-21 06-Jul-21 342 0.020 +/- 0.004 < 0.016 06-Jul-21 12-Jul-21 262 0.021 +/- 0.005 < 0.015 12-Jul-21 19-Jul-21 290 0.023 +/- 0.004 < 0.014 19-Jul-21 26-Jul-21 287 0.031 +/- 0.005 < 0.019 26-Jul-21 02-Aug-21 299 0.039 +/- 0.005 < 0.010 02-Aug-21 09-Aug-21 290 0.030 +/- 0.005 < 0.015 09-Aug-21 16-Aug-21 307 0.021 +/- 0.004 < 0.012 16-Aug-21 23-Aug-21 300 0.025 +/- 0.004 < 0.015 23-Aug-21 30-Aug-21 298 0.028 +/- 0.005 < 0.021 30-Aug-21 07-Sep-21 344 0.029 +/- 0.004 < 0.012 07-Sep-21 13-Sep-21 258 0.036 +/- 0.005 < 0.019 13-Sep-21 20-Sep-21 292 0.026 +/- 0.005 < 0.014 13-Sep-21 20-Sep-21 292 0.031 +/- 0.005 Duplicate 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 1

Enclosure I 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) 20-Sep-21 28-Sep-21 354 0.034 +/- 0.004 < 0.014 28-Sep-21 04-Oct-21 257 0.028 +/- 0.005 < 0.016 04-Oct-21 11-Oct-21 306 0.037 +/- 0.005 < 0.016 11-Oct-21 18-Oct-21 293 0.033 +/- 0.005 < 0.018 18-Oct-21 25-Oct-21 301 0.026 +/- 0.005 < 0.011 18-Oct-21 25-Oct-21 301 0.030 +/- 0.005 Duplicate 25-Oct-21 01-Nov-21 294 0.016 +/- 0.004 < 0.009 01-Nov-21 08-Nov-21 293 0.035 +/- 0.005 < 0.013 08-Nov-21 15-Nov-21 295 0.027 +/- 0.005 < 0.014 15-Nov-21 22-Nov-21 299 0.029 +/- 0.005 < 0.015 22-Nov-21 29-Nov-21 299 0.037 +/- 0.005 < 0.011 29-Nov-21 06-Dec-21 299 0.043 +/- 0.005 < 0.016 06-Dec-21 13-Dec-21 291 0.028 +/- 0.005 < 0.010 13-Dec-21 20-Dec-21 300 0.033 +/- 0.005 < 0.025 20-Dec-21 27-Dec-21 290 0.055 +/- 0.005 < 0.016 27-Dec-21 03-Jan-22 306 0.050 +/- 0.005 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 2

Enclosure I 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) 28-Dec-20 04-Jan-21 300 0.039 +/- 0.005 < 0.008 04-Jan-21 11-Jan-21 307 0.027 +/- 0.005 < 0.005 11-Jan-21 18-Jan-21 294 0.033 +/- 0.005 < 0.011 18-Jan-21 25-Jan-21 305 0.020 +/- 0.004 < 0.007 25-Jan-21 01-Feb-21 312 0.024 +/- 0.004 < 0.007 01-Feb-21 08-Feb-21 299 0.037 +/- 0.005 < 0.008 08-Feb-21 17-Feb-21 423 0.035 +/- 0.004 < 0.012 17-Feb-21 22-Feb-21 206 0.047 +/- 0.007 < 0.018 22-Feb-21 01-Mar-21 299 0.020 +/- 0.004 < 0.014 01-Mar-21 08-Mar-21 293 0.029 +/- 0.005 < 0.007 01-Mar-21 08-Mar-21 293 0.028 +/- 0.005 Duplicate 08-Mar-21 15-Mar-21 295 0.017 +/- 0.004 < 0.008 15-Mar-21 22-Mar-21 302 0.029 +/- 0.004 < 0.008 22-Mar-21 29-Mar-21 298 0.014 +/- 0.004 < 0.008 29-Mar-21 05-Apr-21 300 0.014 +/- 0.004 < 0.007 05-Apr-21 12-Apr-21 301 0.016 +/- 0.004 < 0.015 12-Apr-21 19-Apr-21 297 0.015 +/- 0.004 < 0.011 19-Apr-21 26-Apr-21 300 0.026 +/- 0.004 < 0.011 19-Apr-21 26-Apr-21 300 0.023 +/- 0.004 Duplicate 26-Apr-21 03-May-21 299 0.025 +/- 0.004 < 0.009 03-May-21 10-May-21 306 0.017 +/- 0.004 < 0.009 10-May-21 17-May-21 293 0.015 +/- 0.004 < 0.006 17-May-21 24-May-21 303 0.011 +/- 0.004 < 0.018 24-May-21 01-Jun-21 330 0.010 +/- 0.004 < 0.018 24-May-21 01-Jun-21 330 0.011 +/- 0.004 Duplicate 01-Jun-21 07-Jun-21 254 0.023 +/- 0.005 < 0.017 07-Jun-21 14-Jun-21 295 0.022 +/- 0.005 < 0.010 14-Jun-21 21-Jun-21 302 0.041 +/- 0.005 < 0.018 21-Jun-21 28-Jun-21 294 0.022 +/- 0.004 < 0.018 28-Jun-21 06-Jul-21 344 0.023 +/- 0.004 < 0.016 06-Jul-21 12-Jul-21 257 0.021 +/- 0.005 < 0.015 12-Jul-21 19-Jul-21 300 0.021 +/- 0.004 < 0.014 19-Jul-21 26-Jul-21 295 0.031 +/- 0.005 < 0.018 26-Jul-21 02-Aug-21 295 0.042 +/- 0.005 < 0.010 26-Jul-21 02-Aug-21 295 0.042 +/- 0.005 Duplicate 02-Aug-21 09-Aug-21 293 0.035 +/- 0.005 < 0.014 09-Aug-21 16-Aug-21 291 0.022 +/- 0.004 < 0.012 16-Aug-21 23-Aug-21 298 0.023 +/- 0.004 < 0.015 23-Aug-21 30-Aug-21 298 0.027 +/- 0.005 < 0.021 30-Aug-21 07-Sep-21 335 0.032 +/- 0.004 < 0.012 07-Sep-21 13-Sep-21 256 0.038 +/- 0.005 < 0.019 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 3

Enclosure I 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) 13-Sep-21 20-Sep-21 291 0.029 +/- 0.005 < 0.014 20-Sep-21 28-Sep-21 353 0.031 +/- 0.004 < 0.014 28-Sep-21 04-Oct-21 245 0.029 +/- 0.006 < 0.017 04-Oct-21 11-Oct-21 310 0.040 +/- 0.005 < 0.016 11-Oct-21 18-Oct-21 281 0.035 +/- 0.005 < 0.018 11-Oct-21 18-Oct-21 281 0.033 +/- 0.005 Duplicate 18-Oct-21 25-Oct-21 301 0.029 +/- 0.005 < 0.011 25-Oct-21 01-Nov-21 313 0.016 +/- 0.004 < 0.008 01-Nov-21 08-Nov-21 299 0.033 +/- 0.005 < 0.013 08-Nov-21 15-Nov-21 299 0.028 +/- 0.005 < 0.014 15-Nov-21 22-Nov-21 301 0.024 +/- 0.005 < 0.015 22-Nov-21 29-Nov-21 298 0.035 +/- 0.005 < 0.011 29-Nov-21 06-Dec-21 295 0.037 +/- 0.005 < 0.016 06-Dec-21 13-Dec-21 295 0.024 +/- 0.005 < 0.010 13-Dec-21 20-Dec-21 302 0.032 +/- 0.004 < 0.025 20-Dec-21 27-Dec-21 288 0.056 +/- 0.006 < 0.016 27-Dec-21 03-Jan-22 307 0.049 +/- 0.005 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 4

Enclosure I 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) 28-Dec-20 04-Jan-21 305 0.037 +/- 0.005 < 0.008 04-Jan-21 11-Jan-21 305 0.023 +/- 0.004 < 0.005 11-Jan-21 18-Jan-21 296 0.032 +/- 0.005 < 0.011 18-Jan-21 25-Jan-21 306 0.023 +/- 0.004 < 0.007 25-Jan-21 01-Feb-21 307 0.028 +/- 0.004 < 0.007 01-Feb-21 08-Feb-21 303 0.036 +/- 0.005 < 0.009 08-Feb-21 17-Feb-21 399 0.034 +/- 0.004 < 0.012 17-Feb-21 22-Feb-21 215 0.052 +/- 0.007 < 0.017 22-Feb-21 01-Mar-21 303 0.021 +/- 0.004 < 0.014 01-Mar-21 08-Mar-21 296 0.030 +/- 0.005 < 0.007 08-Mar-21 15-Mar-21 297 0.019 +/- 0.004 < 0.008 08-Mar-21 15-Mar-21 297 0.019 +/- 0.004 Duplicate 15-Mar-21 22-Mar-21 306 0.033 +/- 0.004 < 0.008 22-Mar-21 29-Mar-21 300 0.011 +/- 0.004 < 0.008 29-Mar-21 05-Apr-21 299 0.011 +/- 0.004 < 0.007 05-Apr-21 12-Apr-21 297 0.021 +/- 0.004 < 0.016 05-Apr-21 12-Apr-21 297 0.022 +/- 0.004 Duplicate 12-Apr-21 19-Apr-21 300 0.017 +/- 0.004 < 0.011 19-Apr-21 26-Apr-21 304 0.023 +/- 0.004 < 0.011 26-Apr-21 03-May-21 299 0.023 +/- 0.004 < 0.010 03-May-21 10-May-21 309 0.016 +/- 0.004 < 0.009 10-May-21 17-May-21 302 0.017 +/- 0.004 < 0.006 10-May-21 17-May-21 302 0.016 +/- 0.004 Duplicate 24-May-21 01-Jun-21 354 0.011 +/- 0.003 < 0.017 01-Jun-21 07-Jun-21 259 0.025 +/- 0.005 < 0.017 07-Jun-21 14-Jun-21 302 0.022 +/- 0.004 < 0.010 14-Jun-21 21-Jun-21 299 0.038 +/- 0.005 < 0.018 21-Jun-21 28-Jun-21 294 0.021 +/- 0.004 < 0.018 28-Jun-21 06-Jul-21 341 0.023 +/- 0.004 < 0.016 28-Jun-21 06-Jul-21 341 0.022 +/- 0.004 Duplicate 06-Jul-21 12-Jul-21 257 0.018 +/- 0.005 < 0.015 12-Jul-21 19-Jul-21 297 0.020 +/- 0.004 < 0.014 19-Jul-21 26-Jul-21 292 0.032 +/- 0.005 < 0.018 26-Jul-21 02-Aug-21 295 0.042 +/- 0.005 < 0.010 02-Aug-21 09-Aug-21 293 0.031 +/- 0.005 < 0.014 09-Aug-21 16-Aug-21 309 0.023 +/- 0.004 < 0.011 09-Aug-21 16-Aug-21 309 0.026 +/- 0.004 Duplicate 16-Aug-21 23-Aug-21 294 0.023 +/- 0.004 < 0.015 23-Aug-21 30-Aug-21 299 0.025 +/- 0.005 < 0.021 30-Aug-21 07-Sep-21 346 0.027 +/- 0.004 < 0.012 07-Sep-21 13-Sep-21 257 0.035 +/- 0.005 < 0.019 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 5

Enclosure I 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) 13-Sep-21 20-Sep-21 295 0.034 +/- 0.005 < 0.013 20-Sep-21 28-Sep-21 352 0.029 +/- 0.004 < 0.014 28-Sep-21 04-Oct-21 250 0.028 +/- 0.005 < 0.016 28-Sep-21 04-Oct-21 250 0.029 +/- 0.005 Duplicate 04-Oct-21 11-Oct-21 297 0.043 +/- 0.005 < 0.017 11-Oct-21 18-Oct-21 299 0.036 +/- 0.005 < 0.017 18-Oct-21 25-Oct-21 300 0.032 +/- 0.005 < 0.012 25-Oct-21 01-Nov-21 298 0.019 +/- 0.004 < 0.009 01-Nov-21 08-Nov-21 296 0.039 +/- 0.005 < 0.013 08-Nov-21 15-Nov-21 303 0.022 +/- 0.004 < 0.013 08-Nov-21 15-Nov-21 303 0.026 +/- 0.005 Duplicate 15-Nov-21 22-Nov-21 303 0.025 +/- 0.005 < 0.015 15-Nov-21 22-Nov-21 303 0.023 +/- 0.004 Duplicate 22-Nov-21 29-Nov-21 296 0.035 +/- 0.005 < 0.011 29-Nov-21 06-Dec-21 297 0.043 +/- 0.005 < 0.016 06-Dec-21 13-Dec-21 295 0.030 +/- 0.005 < 0.010 13-Dec-21 20-Dec-21 303 0.034 +/- 0.005 < 0.025 20-Dec-21 27-Dec-21 289 0.060 +/- 0.006 < 0.016 27-Dec-21 03-Jan-22 308 0.055 +/- 0.006 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 6

Enclosure I 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) 28-Dec-20 04-Jan-21 301 0.043 +/- 0.005 < 0.008 04-Jan-21 11-Jan-21 309 0.023 +/- 0.004 < 0.005 11-Jan-21 18-Jan-21 293 0.030 +/- 0.005 < 0.011 18-Jan-21 25-Jan-21 309 0.021 +/- 0.004 < 0.007 25-Jan-21 01-Feb-21 309 0.028 +/- 0.004 < 0.007 01-Feb-21 08-Feb-21 300 0.037 +/- 0.005 < 0.008 08-Feb-21 17-Feb-21 413 0.036 +/- 0.004 < 0.012 17-Feb-21 22-Feb-21 219 0.050 +/- 0.007 < 0.017 22-Feb-21 01-Mar-21 300 0.016 +/- 0.004 < 0.014 01-Mar-21 08-Mar-21 297 0.027 +/- 0.005 < 0.007 08-Mar-21 15-Mar-21 298 0.016 +/- 0.004 < 0.008 15-Mar-21 22-Mar-21 306 0.033 +/- 0.004 < 0.008 22-Mar-21 29-Mar-21 302 0.010 +/- 0.004 < 0.008 29-Mar-21 05-Apr-21 328 0.010 +/- 0.003 < 0.007 05-Apr-21 12-Apr-21 297 0.021 +/- 0.004 < 0.016 12-Apr-21 19-Apr-21 301 0.015 +/- 0.004 < 0.011 19-Apr-21 26-Apr-21 305 0.021 +/- 0.004 < 0.011 26-Apr-21 03-May-21 297 0.026 +/- 0.004 < 0.010 03-May-21 10-May-21 306 0.017 +/- 0.004 < 0.009 10-May-21 17-May-21 303 0.016 +/- 0.004 < 0.006 17-May-21 24-May-21 297 0.014 +/- 0.004 < 0.018 24-May-21 01-Jun-21 349 0.010 +/- 0.003 < 0.018 01-Jun-21 07-Jun-21 250 0.020 +/- 0.005 < 0.018 07-Jun-21 14-Jun-21 305 0.020 +/- 0.004 < 0.010 07-Jun-21 14-Jun-21 305 0.018 +/- 0.004 Duplicate 14-Jun-21 21-Jun-21 297 0.039 +/- 0.005 < 0.019 21-Jun-21 28-Jun-21 294 0.018 +/- 0.004 < 0.018 28-Jun-21 06-Jul-21 336 0.021 +/- 0.004 < 0.016 06-Jul-21 12-Jul-21 264 0.021 +/- 0.005 < 0.015 12-Jul-21 19-Jul-21 297 0.025 +/- 0.005 < 0.014 19-Jul-21 26-Jul-21 300 0.031 +/- 0.005 < 0.018 26-Jul-21 02-Aug-21 301 0.041 +/- 0.005 < 0.010 02-Aug-21 09-Aug-21 294 0.031 +/- 0.005 < 0.014 09-Aug-21 16-Aug-21 315 0.022 +/- 0.004 < 0.011 16-Aug-21 23-Aug-21 288 0.021 +/- 0.004 < 0.015 23-Aug-21 30-Aug-21 305 0.024 +/- 0.004 < 0.021 30-Aug-21 07-Sep-21 326 0.027 +/- 0.004 < 0.013 07-Sep-21 13-Sep-21 251 0.033 +/- 0.005 < 0.020 13-Sep-21 20-Sep-21 286 0.032 +/- 0.005 < 0.014 20-Sep-21 28-Sep-21 358 0.028 +/- 0.004 < 0.014 28-Sep-21 04-Oct-21 257 0.024 +/- 0.005 < 0.016 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 7

Enclosure I 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) 04-Oct-21 11-Oct-21 300 0.041 +/- 0.005 < 0.016 11-Oct-21 18-Oct-21 298 0.034 +/- 0.005 < 0.017 18-Oct-21 25-Oct-21 299 0.027 +/- 0.005 < 0.012 25-Oct-21 01-Nov-21 299 0.017 +/- 0.004 < 0.009 01-Nov-21 08-Nov-21 300 0.036 +/- 0.005 < 0.012 08-Nov-21 15-Nov-21 313 0.023 +/- 0.004 < 0.013 15-Nov-21 22-Nov-21 305 0.025 +/- 0.005 < 0.014 22-Nov-21 29-Nov-21 294 0.038 +/- 0.005 < 0.011 22-Nov-21 29-Nov-21 294 0.035 +/- 0.005 Duplicate 29-Nov-21 06-Dec-21 298 0.039 +/- 0.005 < 0.016 06-Dec-21 13-Dec-21 296 0.026 +/- 0.005 < 0.010 13-Dec-21 20-Dec-21 301 0.038 +/- 0.005 < 0.025 20-Dec-21 27-Dec-21 292 0.071 +/- 0.006 < 0.016 27-Dec-21 03-Jan-22 305 0.057 +/- 0.006 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 8

Enclosure I 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) 28-Dec-20 04-Jan-21 293 0.043 +/- 0.005 < 0.008 04-Jan-21 11-Jan-21 303 0.024 +/- 0.004 < 0.005 11-Jan-21 18-Jan-21 296 0.031 +/- 0.005 < 0.011 18-Jan-21 25-Jan-21 309 0.024 +/- 0.004 < 0.007 25-Jan-21 01-Feb-21 311 0.029 +/- 0.004 < 0.007 01-Feb-21 08-Feb-21 300 0.032 +/- 0.005 < 0.008 08-Feb-21 17-Feb-21 403 0.038 +/- 0.004 < 0.012 17-Feb-21 22-Feb-21 222 0.054 +/- 0.007 < 0.016 22-Feb-21 01-Mar-21 300 0.018 +/- 0.004 < 0.014 01-Mar-21 08-Mar-21 294 0.028 +/- 0.005 < 0.007 08-Mar-21 15-Mar-21 299 0.019 +/- 0.004 < 0.008 15-Mar-21 22-Mar-21 308 0.035 +/- 0.004 < 0.008 22-Mar-21 29-Mar-21 306 0.013 +/- 0.004 < 0.008 29-Mar-21 05-Apr-21 300 0.013 +/- 0.004 < 0.007 05-Apr-21 12-Apr-21 293 0.017 +/- 0.004 < 0.016 12-Apr-21 19-Apr-21 302 0.016 +/- 0.004 < 0.011 19-Apr-21 26-Apr-21 302 0.025 +/- 0.004 < 0.011 26-Apr-21 03-May-21 301 0.029 +/- 0.004 < 0.010 03-May-21 10-May-21 309 0.019 +/- 0.004 < 0.009 10-May-21 17-May-21 302 0.017 +/- 0.004 < 0.006 17-May-21 24-May-21 290 0.016 +/- 0.004 < 0.019 24-May-21 01-Jun-21 340 0.012 +/- 0.004 < 0.018 01-Jun-21 07-Jun-21 257 0.023 +/- 0.005 < 0.017 07-Jun-21 14-Jun-21 298 0.022 +/- 0.005 < 0.010 14-Jun-21 21-Jun-21 296 0.039 +/- 0.005 < 0.019 21-Jun-21 28-Jun-21 300 0.020 +/- 0.004 < 0.018 28-Jun-21 06-Jul-21 343 0.020 +/- 0.004 < 0.016 06-Jul-21 12-Jul-21 257 0.019 +/- 0.005 < 0.015 06-Jul-21 12-Jul-21 257 0.022 +/- 0.005 Duplicate 12-Jul-21 19-Jul-21 298 0.022 +/- 0.004 < 0.014 19-Jul-21 26-Jul-21 295 0.035 +/- 0.005 < 0.018 26-Jul-21 02-Aug-21 299 0.039 +/- 0.005 < 0.010 02-Aug-21 09-Aug-21 294 0.032 +/- 0.005 < 0.014 09-Aug-21 16-Aug-21 307 0.026 +/- 0.004 < 0.012 16-Aug-21 23-Aug-21 294 0.025 +/- 0.005 < 0.015 23-Aug-21 30-Aug-21 299 0.023 +/- 0.005 < 0.021 30-Aug-21 07-Sep-21 343 0.029 +/- 0.004 < 0.012 07-Sep-21 13-Sep-21 259 0.044 +/- 0.006 < 0.019 13-Sep-21 20-Sep-21 298 0.034 +/- 0.005 < 0.013 20-Sep-21 28-Sep-21 358 0.030 +/- 0.004 < 0.014 28-Sep-21 04-Oct-21 250 0.028 +/- 0.005 < 0.016 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 9

Enclosure I 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) 04-Oct-21 11-Oct-21 300 0.043 +/- 0.005 < 0.016 11-Oct-21 18-Oct-21 304 0.034 +/- 0.005 < 0.017 18-Oct-21 25-Oct-21 301 0.033 +/- 0.005 < 0.011 25-Oct-21 01-Nov-21 299 0.017 +/- 0.004 < 0.009 25-Oct-21 01-Nov-21 299 0.016 +/- 0.004 Duplicate 01-Nov-21 08-Nov-21 308 0.038 +/- 0.005 < 0.012 08-Nov-21 15-Nov-21 301 0.027 +/- 0.005 < 0.014 15-Nov-21 22-Nov-21 300 0.029 +/- 0.005 < 0.015 22-Nov-21 29-Nov-21 301 0.039 +/- 0.005 < 0.011 29-Nov-21 06-Dec-21 301 0.043 +/- 0.005 < 0.016 06-Dec-21 13-Dec-21 299 0.030 +/- 0.005 < 0.010 13-Dec-21 20-Dec-21 306 0.036 +/- 0.005 < 0.025 20-Dec-21 27-Dec-21 293 0.064 +/- 0.006 < 0.016 27-Dec-21 03-Jan-22 297 0.063 +/- 0.006 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 10

Enclosure I 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) 28-Dec-20 04-Jan-21 305 0.036 +/- 0.005 < 0.008 28-Dec-20 04-Jan-21 305 0.035 +/- 0.005 Duplicate 04-Jan-21 11-Jan-21 299 0.022 +/- 0.004 < 0.005 11-Jan-21 18-Jan-21 300 0.028 +/- 0.005 < 0.011 18-Jan-21 25-Jan-21 307 0.017 +/- 0.004 < 0.007 25-Jan-21 01-Feb-21 303 0.023 +/- 0.004 < 0.007 01-Feb-21 08-Feb-21 300 0.036 +/- 0.005 < 0.009 01-Feb-21 08-Feb-21 300 0.039 +/- 0.005 Duplicate 08-Feb-21 17-Feb-21 392 0.030 +/- 0.004 < 0.013 08-Feb-21 17-Feb-21 392 0.029 +/- 0.004 Duplicate 17-Feb-21 22-Feb-21 216 0.043 +/- 0.006 < 0.017 22-Feb-21 01-Mar-21 300 0.018 +/- 0.004 < 0.014 22-Feb-21 01-Mar-21 300 0.016 +/- 0.004 Duplicate 01-Mar-21 08-Mar-21 296 0.025 +/- 0.005 < 0.007 08-Mar-21 15-Mar-21 301 0.018 +/- 0.004 < 0.008 15-Mar-21 22-Mar-21 301 0.028 +/- 0.004 < 0.008 22-Mar-21 29-Mar-21 302 0.014 +/- 0.004 < 0.008 29-Mar-21 05-Apr-21 302 0.014 +/- 0.004 < 0.007 29-Mar-21 05-Apr-21 302 0.014 +/- 0.004 Duplicate 05-Apr-21 12-Apr-21 302 0.017 +/- 0.004 < 0.015 12-Apr-21 19-Apr-21 299 0.015 +/- 0.004 < 0.011 12-Apr-21 19-Apr-21 299 0.016 +/- 0.004 Duplicate 19-Apr-21 26-Apr-21 303 0.024 +/- 0.004 < 0.011 26-Apr-21 03-May-21 300 0.024 +/- 0.004 < 0.010 03-May-21 10-May-21 297 0.013 +/- 0.004 < 0.010 10-May-21 17-May-21 300 0.017 +/- 0.004 < 0.006 17-May-21 24-May-21 295 0.012 +/- 0.004 < 0.018 17-May-21 24-May-21 295 0.012 +/- 0.004 Duplicate 24-May-21 01-Jun-21 342 0.011 +/- 0.004 < 0.018 01-Jun-21 07-Jun-21 251 0.022 +/- 0.005 < 0.018 07-Jun-21 14-Jun-21 295 0.017 +/- 0.004 < 0.010 14-Jun-21 21-Jun-21 296 0.036 +/- 0.005 < 0.019 21-Jun-21 28-Jun-21 289 0.019 +/- 0.004 < 0.018 28-Jun-21 06-Jul-21 341 0.025 +/- 0.004 < 0.016 06-Jul-21 12-Jul-21 256 0.017 +/- 0.005 < 0.015 12-Jul-21 19-Jul-21 294 0.024 +/- 0.004 < 0.014 19-Jul-21 26-Jul-21 294 0.033 +/- 0.005 < 0.018 26-Jul-21 02-Aug-21 293 0.042 +/- 0.005 < 0.010 02-Aug-21 09-Aug-21 293 0.031 +/- 0.005 < 0.014 09-Aug-21 16-Aug-21 307 0.024 +/- 0.004 < 0.012 16-Aug-21 23-Aug-21 293 0.027 +/- 0.005 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 11

Enclosure I 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) 23-Aug-21 30-Aug-21 292 0.030 +/- 0.005 < 0.022 30-Aug-21 07-Sep-21 342 0.025 +/- 0.004 < 0.012 07-Sep-21 13-Sep-21 258 0.038 +/- 0.005 < 0.019 13-Sep-21 20-Sep-21 295 0.038 +/- 0.005 < 0.013 20-Sep-21 28-Sep-21 354 0.027 +/- 0.004 < 0.014 28-Sep-21 04-Oct-21 254 0.027 +/- 0.005 < 0.016 04-Oct-21 11-Oct-21 302 0.041 +/- 0.005 < 0.016 11-Oct-21 18-Oct-21 293 0.035 +/- 0.005 < 0.018 18-Oct-21 25-Oct-21 301 0.028 +/- 0.005 < 0.011 25-Oct-21 01-Nov-21 296 0.017 +/- 0.004 < 0.009 01-Nov-21 08-Nov-21 292 0.038 +/- 0.005 < 0.013 08-Nov-21 15-Nov-21 303 0.029 +/- 0.005 < 0.013 15-Nov-21 22-Nov-21 299 0.024 +/- 0.005 < 0.015 22-Nov-21 29-Nov-21 300 0.044 +/- 0.005 < 0.011 29-Nov-21 06-Dec-21 300 0.041 +/- 0.005 < 0.016 06-Dec-21 13-Dec-21 293 0.031 +/- 0.005 < 0.010 13-Dec-21 20-Dec-21 303 0.037 +/- 0.005 < 0.025 20-Dec-21 27-Dec-21 293 0.063 +/- 0.006 < 0.016 20-Dec-21 27-Dec-21 293 0.060 +/- 0.006 Duplicate 27-Dec-21 03-Jan-22 310 0.053 +/- 0.005 < 0.015 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 12

Enclosure I Quarterly Air Particulates - Gamma Location: 002 29-Mar-21 Nuclide Concentration (pCi/m3)

BE-7 0.082 +/- 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 28-Jun-21 Nuclide Concentration (pCi/m3)

BE-7 0.119 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 28-Sep-21 Nuclide Concentration (pCi/m3)

BE-7 0.105 +/- 0.018 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-Jan-22 Nuclide Concentration (pCi/m3)

BE-7 0.072 +/- 0.017 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001

Enclosure I Quarterly Air Particulates - Gamma Location: 018 29-Mar-21 Nuclide Concentration (pCi/m3)

BE-7 0.074 +/- 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 28-Jun-21 Nuclide Concentration (pCi/m3)

BE-7 0.119 +/- 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 28-Sep-21 Nuclide Concentration (pCi/m3)

BE-7 0.100 +/- 0.019 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-Jan-22 Nuclide Concentration (pCi/m3)

BE-7 0.077 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001

Enclosure I Quarterly Air Particulates - Gamma Location: 032 29-Mar-21 Nuclide Concentration (pCi/m3)

BE-7 0.079 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 28-Jun-21 Nuclide Concentration (pCi/m3)

BE-7 0.110 +/- 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 28-Sep-21 Nuclide Concentration (pCi/m3)

BE-7 0.115 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Jan-22 Nuclide Concentration (pCi/m3)

BE-7 0.081 +/- 0.017 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Enclosure I Quarterly Air Particulates - Gamma Location: 037 29-Mar-21 Nuclide Concentration (pCi/m3)

BE-7 0.066 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 28-Jun-21 Nuclide Concentration (pCi/m3)

BE-7 0.120 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 28-Sep-21 Nuclide Concentration (pCi/m3)

BE-7 0.081 +/- 0.017 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-Jan-22 Nuclide Concentration (pCi/m3)

BE-7 0.068 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Enclosure I Quarterly Air Particulates - Gamma Location: 049 29-Mar-21 Nuclide Concentration (pCi/m3)

BE-7 0.079 +/- 0.017 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 28-Jun-21 Nuclide Concentration (pCi/m3)

BE-7 0.108 +/- 0.017 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 28-Sep-21 Nuclide Concentration (pCi/m3)

BE-7 0.105 +/- 0.018 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-Jan-22 Nuclide Concentration (pCi/m3)

BE-7 0.075 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.002 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

Enclosure I Quarterly Air Particulates - Gamma Location: 053 29-Mar-21 Nuclide Concentration (pCi/m3)

BE-7 0.065 +/- 0.015 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.003 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 28-Jun-21 Nuclide Concentration (pCi/m3)

BE-7 0.115 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 28-Sep-21 Nuclide Concentration (pCi/m3)

BE-7 0.098 +/- 0.017 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.001 CO-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001 03-Jan-22 Nuclide Concentration (pCi/m3)

BE-7 0.064 +/- 0.016 MN-54 < 0.001 CO-58 < 0.001 FE-59 < 0.003 CO-60 < 0.001 ZN-65 < 0.003 ZR-NB-95 < 0.002 CS-134 < 0.001 CS-137 < 0.001

Enclosure I Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Jan-21 SURFACE WATER MN-54 < 4.3 11-Jan-21 SURFACE WATER CO-58 < 4.8 11-Jan-21 SURFACE WATER FE-59 < 5.7 11-Jan-21 SURFACE WATER CO-60 < 5.6 11-Jan-21 SURFACE WATER ZN-65 < 15.1 11-Jan-21 SURFACE WATER ZR-NB-95 < 8.2 11-Jan-21 SURFACE WATER I-131 < 7.3 11-Jan-21 SURFACE WATER CS-134 < 6.2 11-Jan-21 SURFACE WATER CS-137 < 6.4 11-Jan-21 SURFACE WATER BA-LA-140 < 3.8 11-Jan-21 SURFACE WATER H-3 < 165.0 24-Feb-21 SURFACE WATER MN-54 < 2.3 24-Feb-21 SURFACE WATER CO-58 < 1.6 24-Feb-21 SURFACE WATER FE-59 < 4.1 24-Feb-21 SURFACE WATER CO-60 < 2.1 24-Feb-21 SURFACE WATER ZN-65 < 7.0 24-Feb-21 SURFACE WATER ZR-NB-95 < 2.7 24-Feb-21 SURFACE WATER I-131 < 5.3 24-Feb-21 SURFACE WATER CS-134 < 3.4 24-Feb-21 SURFACE WATER CS-137 < 2.3 24-Feb-21 SURFACE WATER BA-LA-140 < 3.7 24-Feb-21 SURFACE WATER H-3 < 161.0 09-Mar-21 SURFACE WATER MN-54 < 1.8 09-Mar-21 SURFACE WATER CO-58 < 1.8 09-Mar-21 SURFACE WATER FE-59 < 5.2 09-Mar-21 SURFACE WATER CO-60 < 2.7 09-Mar-21 SURFACE WATER ZN-65 < 5.8 09-Mar-21 SURFACE WATER ZR-NB-95 < 3.8 09-Mar-21 SURFACE WATER I-131 < 4.6 09-Mar-21 SURFACE WATER CS-134 < 3.9 09-Mar-21 SURFACE WATER CS-137 < 3.4 09-Mar-21 SURFACE WATER BA-LA-140 < 5.5 09-Mar-21 SURFACE WATER H-3 < 158.0 09-Mar-21 SURFACE WATER FE-55 < 129.0 13-Apr-21 SURFACE WATER MN-54 < 4.8 13-Apr-21 SURFACE WATER CO-58 < 2.9 13-Apr-21 SURFACE WATER FE-59 < 6.7 13-Apr-21 SURFACE WATER CO-60 < 2.9 2021 Annual Radiological Environmental Operating Report Page C - 19 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Apr-21 SURFACE WATER ZN-65 < 4.8 13-Apr-21 SURFACE WATER ZR-NB-95 < 2.7 13-Apr-21 SURFACE WATER I-131 < 3.9 13-Apr-21 SURFACE WATER CS-134 < 4.7 13-Apr-21 SURFACE WATER CS-137 < 4.6 13-Apr-21 SURFACE WATER BA-LA-140 < 2.9 13-Apr-21 SURFACE WATER H-3 < 160.0 04-May-21 SURFACE WATER MN-54 < 5.1 04-May-21 SURFACE WATER CO-58 < 4.9 04-May-21 SURFACE WATER FE-59 < 8.2 04-May-21 SURFACE WATER CO-60 < 3.3 04-May-21 SURFACE WATER ZN-65 < 7.0 04-May-21 SURFACE WATER ZR-NB-95 < 3.7 04-May-21 SURFACE WATER I-131 < 6.8 04-May-21 SURFACE WATER CS-134 < 6.0 04-May-21 SURFACE WATER CS-137 < 5.1 04-May-21 SURFACE WATER BA-LA-140 < 4.5 04-May-21 SURFACE WATER H-3 < 158.0 04-May-21 SURFACE WATER FE-55 < 160.0 22-Jun-21 SURFACE WATER MN-54 < 3.1 22-Jun-21 SURFACE WATER CO-58 < 2.8 22-Jun-21 SURFACE WATER FE-59 < 7.1 22-Jun-21 SURFACE WATER CO-60 < 1.8 22-Jun-21 SURFACE WATER ZN-65 < 7.6 22-Jun-21 SURFACE WATER ZR-NB-95 < 4.1 22-Jun-21 SURFACE WATER I-131 < 9.2 22-Jun-21 SURFACE WATER CS-134 < 4.5 22-Jun-21 SURFACE WATER CS-137 < 3.8 22-Jun-21 SURFACE WATER BA-LA-140 < 4.5 22-Jun-21 SURFACE WATER H-3 < 158.0 14-Jul-21 SURFACE WATER MN-54 < 2.2 14-Jul-21 SURFACE WATER CO-58 < 1.3 14-Jul-21 SURFACE WATER FE-59 < 6.3 14-Jul-21 SURFACE WATER CO-60 < 1.3 14-Jul-21 SURFACE WATER ZN-65 < 5.6 14-Jul-21 SURFACE WATER ZR-NB-95 < 3.1 14-Jul-21 SURFACE WATER I-131 < 4.0 14-Jul-21 SURFACE WATER CS-134 < 2.6 2021 Annual Radiological Environmental Operating Report Page C - 20 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 14-Jul-21 SURFACE WATER CS-137 < 3.1 14-Jul-21 SURFACE WATER BA-LA-140 < 2.7 14-Jul-21 SURFACE WATER H-3 < 156.0 23-Aug-21 SURFACE WATER MN-54 < 4.5 23-Aug-21 SURFACE WATER CO-58 < 3.8 23-Aug-21 SURFACE WATER FE-59 < 8.4 23-Aug-21 SURFACE WATER CO-60 < 1.8 23-Aug-21 SURFACE WATER ZN-65 < 4.0 23-Aug-21 SURFACE WATER ZR-NB-95 < 2.7 23-Aug-21 SURFACE WATER I-131 < 5.3 23-Aug-21 SURFACE WATER CS-134 < 4.4 23-Aug-21 SURFACE WATER CS-137 < 4.1 23-Aug-21 SURFACE WATER BA-LA-140 < 1.6 23-Aug-21 SURFACE WATER H-3 < 157.0 23-Aug-21 SURFACE WATER FE-55 < 142.0 28-Sep-21 SURFACE WATER MN-54 < 2.7 28-Sep-21 SURFACE WATER CO-58 < 3.1 28-Sep-21 SURFACE WATER FE-59 < 5.8 28-Sep-21 SURFACE WATER CO-60 < 2.2 28-Sep-21 SURFACE WATER ZN-65 < 3.4 28-Sep-21 SURFACE WATER ZR-NB-95 < 3.2 28-Sep-21 SURFACE WATER I-131 < 9.7 28-Sep-21 SURFACE WATER CS-134 < 4.0 28-Sep-21 SURFACE WATER CS-137 < 2.4 28-Sep-21 SURFACE WATER BA-LA-140 < 2.9 28-Sep-21 SURFACE WATER H-3 < 161.0 12-Oct-21 SURFACE WATER MN-54 < 1.9 Duplicate 12-Oct-21 SURFACE WATER MN-54 < 2.3 12-Oct-21 SURFACE WATER CO-58 < 2.8 12-Oct-21 SURFACE WATER CO-58 < 1.7 Duplicate 12-Oct-21 SURFACE WATER FE-59 < 4.4 12-Oct-21 SURFACE WATER FE-59 < 4.0 Duplicate 12-Oct-21 SURFACE WATER CO-60 < 1.8 Duplicate 12-Oct-21 SURFACE WATER CO-60 < 3.5 12-Oct-21 SURFACE WATER ZN-65 < 4.8 12-Oct-21 SURFACE WATER ZN-65 < 4.6 Duplicate 12-Oct-21 SURFACE WATER ZR-NB-95 < 4.0 12-Oct-21 SURFACE WATER ZR-NB-95 < 3.2 Duplicate 2021 Annual Radiological Environmental Operating Report Page C - 21 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 12-Oct-21 SURFACE WATER I-131 < 5.4 Duplicate 12-Oct-21 SURFACE WATER I-131 < 5.1 12-Oct-21 SURFACE WATER CS-134 < 2.8 12-Oct-21 SURFACE WATER CS-134 < 3.8 Duplicate 12-Oct-21 SURFACE WATER CS-137 < 2.7 Duplicate 12-Oct-21 SURFACE WATER CS-137 < 2.5 12-Oct-21 SURFACE WATER BA-LA-140 < 4.1 12-Oct-21 SURFACE WATER BA-LA-140 < 3.3 Duplicate 12-Oct-21 SURFACE WATER H-3 < 159.0 Duplicate 12-Oct-21 SURFACE WATER H-3 < 159.0 22-Nov-21 SURFACE WATER MN-54 < 1.3 22-Nov-21 SURFACE WATER CO-58 < 0.9 22-Nov-21 SURFACE WATER FE-59 < 2.4 22-Nov-21 SURFACE WATER CO-60 < 0.9 22-Nov-21 SURFACE WATER ZN-65 < 2.1 22-Nov-21 SURFACE WATER ZR-NB-95 < 2.4 22-Nov-21 SURFACE WATER I-131 < 14.9 22-Nov-21 SURFACE WATER CS-134 < 1.1 22-Nov-21 SURFACE WATER CS-137 < 1.2 22-Nov-21 SURFACE WATER BA-LA-140 < 6.0 22-Nov-21 SURFACE WATER H-3 < 161.0 22-Nov-21 SURFACE WATER FE-55 < 57.0 08-Dec-21 SURFACE WATER MN-54 < 2.5 08-Dec-21 SURFACE WATER CO-58 < 3.8 08-Dec-21 SURFACE WATER FE-59 < 6.9 08-Dec-21 SURFACE WATER CO-60 < 2.8 08-Dec-21 SURFACE WATER ZN-65 < 7.1 08-Dec-21 SURFACE WATER ZR-NB-95 < 2.7 08-Dec-21 SURFACE WATER I-131 < 3.7 08-Dec-21 SURFACE WATER CS-134 < 3.7 08-Dec-21 SURFACE WATER CS-137 < 3.5 08-Dec-21 SURFACE WATER BA-LA-140 < 4.3 08-Dec-21 SURFACE WATER H-3 < 162.0 2021 Annual Radiological Environmental Operating Report Page C - 22 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Jan-21 SURFACE WATER MN-54 < 3.4 11-Jan-21 SURFACE WATER CO-58 < 2.2 11-Jan-21 SURFACE WATER FE-59 < 3.5 11-Jan-21 SURFACE WATER CO-60 < 2.4 11-Jan-21 SURFACE WATER ZN-65 < 6.6 11-Jan-21 SURFACE WATER ZR-NB-95 < 2.2 11-Jan-21 SURFACE WATER I-131 < 5.0 11-Jan-21 SURFACE WATER CS-134 < 3.4 11-Jan-21 SURFACE WATER CS-137 < 3.5 11-Jan-21 SURFACE WATER BA-LA-140 < 3.9 11-Jan-21 SURFACE WATER H-3 13,744 +/- 360.0 09-Feb-21 SURFACE WATER H-3 15,086 +/- 376.0 09-Feb-21 SURFACE WATER H-3 15,104 +/- 377.0 Duplicate 24-Feb-21 SURFACE WATER MN-54 < 1.8 24-Feb-21 SURFACE WATER CO-58 < 2.2 24-Feb-21 SURFACE WATER FE-59 < 4.4 24-Feb-21 SURFACE WATER CO-60 < 2.4 24-Feb-21 SURFACE WATER ZN-65 < 7.4 24-Feb-21 SURFACE WATER ZR-NB-95 < 1.4 24-Feb-21 SURFACE WATER I-131 < 4.9 24-Feb-21 SURFACE WATER CS-134 < 4.1 24-Feb-21 SURFACE WATER CS-137 < 3.0 24-Feb-21 SURFACE WATER BA-LA-140 < 5.9 24-Feb-21 SURFACE WATER H-3 14,486 +/- 368.0 09-Mar-21 SURFACE WATER MN-54 < 4.3 09-Mar-21 SURFACE WATER CO-58 < 2.8 09-Mar-21 SURFACE WATER FE-59 < 6.1 09-Mar-21 SURFACE WATER CO-60 < 3.6 09-Mar-21 SURFACE WATER ZN-65 < 8.7 09-Mar-21 SURFACE WATER ZR-NB-95 < 3.2 09-Mar-21 SURFACE WATER I-131 < 6.5 09-Mar-21 SURFACE WATER CS-134 < 4.6 09-Mar-21 SURFACE WATER CS-137 < 5.0 09-Mar-21 SURFACE WATER BA-LA-140 < 2.8 09-Mar-21 SURFACE WATER H-3 15,543 +/- 381.0 09-Mar-21 SURFACE WATER FE-55 < 132.0 13-Apr-21 SURFACE WATER MN-54 < 4.2 13-Apr-21 SURFACE WATER CO-58 < 3.5 2021 Annual Radiological Environmental Operating Report Page C - 23 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Apr-21 SURFACE WATER FE-59 < 6.5 13-Apr-21 SURFACE WATER CO-60 < 3.4 13-Apr-21 SURFACE WATER ZN-65 < 2.1 13-Apr-21 SURFACE WATER ZR-NB-95 < 4.2 13-Apr-21 SURFACE WATER I-131 < 6.7 13-Apr-21 SURFACE WATER CS-134 < 5.2 13-Apr-21 SURFACE WATER CS-137 < 4.1 13-Apr-21 SURFACE WATER BA-LA-140 < 1.9 13-Apr-21 SURFACE WATER H-3 14,806 +/- 373.0 04-May-21 SURFACE WATER MN-54 < 3.6 04-May-21 SURFACE WATER CO-58 < 3.8 04-May-21 SURFACE WATER FE-59 < 10.5 04-May-21 SURFACE WATER CO-60 < 1.3 04-May-21 SURFACE WATER ZN-65 < 5.3 04-May-21 SURFACE WATER ZR-NB-95 < 3.3 04-May-21 SURFACE WATER I-131 < 6.1 04-May-21 SURFACE WATER CS-134 < 4.7 04-May-21 SURFACE WATER CS-137 < 6.0 04-May-21 SURFACE WATER BA-LA-140 < 2.3 04-May-21 SURFACE WATER H-3 14,817 +/- 374.0 04-May-21 SURFACE WATER FE-55 < 164.0 22-Jun-21 SURFACE WATER MN-54 < 2.6 22-Jun-21 SURFACE WATER MN-54 < 2.5 Duplicate 22-Jun-21 SURFACE WATER CO-58 < 4.0 22-Jun-21 SURFACE WATER CO-58 < 2.1 Duplicate 22-Jun-21 SURFACE WATER FE-59 < 5.0 22-Jun-21 SURFACE WATER FE-59 < 5.0 Duplicate 22-Jun-21 SURFACE WATER CO-60 < 1.5 22-Jun-21 SURFACE WATER CO-60 < 1.8 Duplicate 22-Jun-21 SURFACE WATER ZN-65 < 5.0 22-Jun-21 SURFACE WATER ZN-65 < 4.2 Duplicate 22-Jun-21 SURFACE WATER ZR-NB-95 < 1.9 22-Jun-21 SURFACE WATER ZR-NB-95 < 3.1 Duplicate 22-Jun-21 SURFACE WATER I-131 < 6.3 Duplicate 22-Jun-21 SURFACE WATER I-131 < 5.2 22-Jun-21 SURFACE WATER CS-134 < 2.7 Duplicate 22-Jun-21 SURFACE WATER CS-134 < 4.1 22-Jun-21 SURFACE WATER CS-137 < 2.7 Duplicate 2021 Annual Radiological Environmental Operating Report Page C - 24 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 22-Jun-21 SURFACE WATER CS-137 < 4.3 22-Jun-21 SURFACE WATER BA-LA-140 < 3.0 Duplicate 22-Jun-21 SURFACE WATER BA-LA-140 < 3.2 22-Jun-21 SURFACE WATER H-3 13,908 +/- 364.0 22-Jun-21 SURFACE WATER H-3 13,961 +/- 364.0 Duplicate 14-Jul-21 SURFACE WATER MN-54 < 3.4 14-Jul-21 SURFACE WATER CO-58 < 3.0 14-Jul-21 SURFACE WATER FE-59 < 8.2 14-Jul-21 SURFACE WATER CO-60 < 3.6 14-Jul-21 SURFACE WATER ZN-65 < 3.8 14-Jul-21 SURFACE WATER ZR-NB-95 < 3.2 14-Jul-21 SURFACE WATER I-131 < 6.4 14-Jul-21 SURFACE WATER CS-134 < 4.3 14-Jul-21 SURFACE WATER CS-137 < 4.1 14-Jul-21 SURFACE WATER BA-LA-140 < 1.5 14-Jul-21 SURFACE WATER H-3 13,573 +/- 362.0 23-Aug-21 SURFACE WATER MN-54 < 1.8 23-Aug-21 SURFACE WATER CO-58 < 2.6 23-Aug-21 SURFACE WATER FE-59 < 4.5 23-Aug-21 SURFACE WATER CO-60 < 3.0 23-Aug-21 SURFACE WATER ZN-65 < 2.4 23-Aug-21 SURFACE WATER ZR-NB-95 < 2.3 23-Aug-21 SURFACE WATER I-131 < 4.0 23-Aug-21 SURFACE WATER CS-134 < 2.8 23-Aug-21 SURFACE WATER CS-137 < 3.0 23-Aug-21 SURFACE WATER BA-LA-140 < 3.1 23-Aug-21 SURFACE WATER H-3 12,614 +/- 348.0 23-Aug-21 SURFACE WATER FE-55 < 153.0 28-Sep-21 SURFACE WATER MN-54 < 2.1 28-Sep-21 SURFACE WATER CO-58 < 1.6 28-Sep-21 SURFACE WATER FE-59 < 5.7 28-Sep-21 SURFACE WATER CO-60 < 2.4 28-Sep-21 SURFACE WATER ZN-65 < 4.0 28-Sep-21 SURFACE WATER ZR-NB-95 < 3.0 28-Sep-21 SURFACE WATER I-131 < 5.5 28-Sep-21 SURFACE WATER CS-134 < 2.4 28-Sep-21 SURFACE WATER CS-137 < 2.5 28-Sep-21 SURFACE WATER BA-LA-140 < 4.3 2021 Annual Radiological Environmental Operating Report Page C - 25 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 28-Sep-21 SURFACE WATER H-3 12,131 +/- 341.0 12-Oct-21 SURFACE WATER MN-54 < 3.2 12-Oct-21 SURFACE WATER CO-58 < 2.6 12-Oct-21 SURFACE WATER FE-59 < 6.5 12-Oct-21 SURFACE WATER CO-60 < 2.9 12-Oct-21 SURFACE WATER ZN-65 < 4.2 12-Oct-21 SURFACE WATER ZR-NB-95 < 2.8 12-Oct-21 SURFACE WATER I-131 < 5.1 12-Oct-21 SURFACE WATER CS-134 < 2.8 12-Oct-21 SURFACE WATER CS-137 < 1.9 12-Oct-21 SURFACE WATER BA-LA-140 < 3.6 12-Oct-21 SURFACE WATER H-3 11,824 +/- 338.0 22-Nov-21 SURFACE WATER MN-54 < 0.9 22-Nov-21 SURFACE WATER CO-58 < 1.1 22-Nov-21 SURFACE WATER FE-59 < 3.6 22-Nov-21 SURFACE WATER CO-60 < 1.4 22-Nov-21 SURFACE WATER ZN-65 < 2.3 22-Nov-21 SURFACE WATER ZR-NB-95 < 2.5 22-Nov-21 SURFACE WATER I-131 < 14.7 22-Nov-21 SURFACE WATER CS-134 < 1.3 22-Nov-21 SURFACE WATER CS-137 < 1.6 22-Nov-21 SURFACE WATER BA-LA-140 < 4.2 22-Nov-21 SURFACE WATER H-3 12,224 +/- 344.0 22-Nov-21 SURFACE WATER FE-55 < 57.0 08-Dec-21 SURFACE WATER MN-54 < 6.2 08-Dec-21 SURFACE WATER CO-58 < 5.8 08-Dec-21 SURFACE WATER FE-59 < 15.0 08-Dec-21 SURFACE WATER CO-60 < 5.3 08-Dec-21 SURFACE WATER ZN-65 < 8.5 08-Dec-21 SURFACE WATER ZR-NB-95 < 4.8 08-Dec-21 SURFACE WATER I-131 < 9.7 08-Dec-21 SURFACE WATER CS-134 < 8.4 08-Dec-21 SURFACE WATER CS-137 < 3.2 08-Dec-21 SURFACE WATER BA-LA-140 < 6.7 08-Dec-21 SURFACE WATER H-3 11,817 +/- 338.0 2021 Annual Radiological Environmental Operating Report Page C - 26 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: B-12 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 3.0 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 2.1 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 2.3 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 2.2 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 5.5 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 1.5 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.314 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 2.6 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 2.8 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 3.5 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 4.0 26-May-21 OFFSITE GROUNDWATER CO-58 < 4.2 26-May-21 OFFSITE GROUNDWATER FE-59 < 9.0 26-May-21 OFFSITE GROUNDWATER CO-60 < 3.1 26-May-21 OFFSITE GROUNDWATER ZN-65 < 4.5 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.1 26-May-21 OFFSITE GROUNDWATER I-131 < 0.32 26-May-21 OFFSITE GROUNDWATER CS-134 < 4.4 26-May-21 OFFSITE GROUNDWATER CS-137 < 4.3 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 3.0 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 3.8 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 3.7 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 6.8 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 3.0 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 3.4 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.8 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.301 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 4.0 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 3.3 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 3.7 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 3.0 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 3.3 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 5.0 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 3.2 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 5.8 2021 Annual Radiological Environmental Operating Report Page C - 27 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: B-12 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 5.1 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.291 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 4.9 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 3.2 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 3.9 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 28 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: C-10 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 3.7 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 2.4 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 5.8 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 4.5 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 4.3 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.6 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.295 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 4.4 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 2.3 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 5.6 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 4.6 26-May-21 OFFSITE GROUNDWATER CO-58 < 2.9 26-May-21 OFFSITE GROUNDWATER FE-59 < 7.9 26-May-21 OFFSITE GROUNDWATER CO-60 < 1.9 26-May-21 OFFSITE GROUNDWATER ZN-65 < 6.6 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.3 26-May-21 OFFSITE GROUNDWATER I-131 < 0.446 26-May-21 OFFSITE GROUNDWATER CS-134 < 5.2 26-May-21 OFFSITE GROUNDWATER CS-137 < 4.1 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 3.1 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 1.8 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 2.5 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 2.7 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 2.5 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 4.4 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.7 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.372 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 3.4 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 3.2 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 4.1 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 3.6 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 1.9 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 5.2 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 3.2 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 2.6 2021 Annual Radiological Environmental Operating Report Page C - 29 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: C-10 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.2 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.406 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 3.3 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 3.8 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 2.6 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 30 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: C-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 4.5 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 3.1 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 6.6 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 3.3 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 7.7 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.5 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.375 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 4.4 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 5.2 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 1.6 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 4.3 26-May-21 OFFSITE GROUNDWATER CO-58 < 2.6 26-May-21 OFFSITE GROUNDWATER FE-59 < 3.2 26-May-21 OFFSITE GROUNDWATER CO-60 < 2.2 26-May-21 OFFSITE GROUNDWATER ZN-65 < 3.3 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.4 26-May-21 OFFSITE GROUNDWATER I-131 < 0.421 26-May-21 OFFSITE GROUNDWATER CS-134 < 3.7 26-May-21 OFFSITE GROUNDWATER CS-137 < 2.9 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 3.5 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 2.1 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 2.9 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 5.3 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 2.2 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 2.6 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.2 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.284 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 2.8 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 2.4 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 3.4 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 5.1 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 4.4 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 8.4 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 4.5 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 3.7 2021 Annual Radiological Environmental Operating Report Page C - 31 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: C-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.4 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.345 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 4.9 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 5.1 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 1.7 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 32 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: F-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 3.1 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 2.4 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 4.8 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 2.4 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 5.8 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.0 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.342 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 4.2 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 2.6 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 2.7 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 4.1 26-May-21 OFFSITE GROUNDWATER CO-58 < 2.8 26-May-21 OFFSITE GROUNDWATER FE-59 < 6.0 26-May-21 OFFSITE GROUNDWATER CO-60 < 2.0 26-May-21 OFFSITE GROUNDWATER ZN-65 < 5.4 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.1 26-May-21 OFFSITE GROUNDWATER I-131 < 0.313 26-May-21 OFFSITE GROUNDWATER CS-134 < 4.4 26-May-21 OFFSITE GROUNDWATER CS-137 < 3.3 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 4.6 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 3.9 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 3.7 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 7.0 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 2.1 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 4.7 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.9 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.357 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 5.0 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 5.4 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 2.8 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 2.5 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 3.1 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 5.3 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 2.7 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 2.6 2021 Annual Radiological Environmental Operating Report Page C - 33 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: F-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.0 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.469 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 3.4 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 4.0 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 3.4 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 34 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: G-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 2.3 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 3.1 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 7.6 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 2.4 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 7.4 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 5.9 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.273 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 4.2 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 2.9 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 4.9 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 2.2 26-May-21 OFFSITE GROUNDWATER CO-58 < 1.7 26-May-21 OFFSITE GROUNDWATER FE-59 < 2.0 26-May-21 OFFSITE GROUNDWATER CO-60 < 1.9 26-May-21 OFFSITE GROUNDWATER ZN-65 < 5.1 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.6 26-May-21 OFFSITE GROUNDWATER I-131 < 0.286 26-May-21 OFFSITE GROUNDWATER CS-134 < 3.2 26-May-21 OFFSITE GROUNDWATER CS-137 < 3.5 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 1.4 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 4.8 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 2.6 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 8.0 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 1.1 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 10.4 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.0 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.253 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 5.2 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 5.0 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 1.6 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 4.4 Duplicate 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 3.2 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 2.6 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 4.8 Duplicate 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 6.8 Duplicate 2021 Annual Radiological Environmental Operating Report Page C - 35 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: G-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 4.1 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 3.1 Duplicate 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 2.2 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 5.0 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 9.8 Duplicate 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.9 Duplicate 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.9 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.49 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.413 Duplicate 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 5.4 Duplicate 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 3.0 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 4.9 Duplicate 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 2.7 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 4.0 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 2.7 Duplicate 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 Duplicate 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 36 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: J-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 1.7 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 2.4 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 4.6 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 2.3 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 5.7 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.8 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.335 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 3.7 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 3.6 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 2.6 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 3.6 26-May-21 OFFSITE GROUNDWATER CO-58 < 2.9 26-May-21 OFFSITE GROUNDWATER FE-59 < 5.3 26-May-21 OFFSITE GROUNDWATER CO-60 < 2.6 26-May-21 OFFSITE GROUNDWATER ZN-65 < 5.6 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.6 26-May-21 OFFSITE GROUNDWATER I-131 < 0.316 26-May-21 OFFSITE GROUNDWATER CS-134 < 3.8 26-May-21 OFFSITE GROUNDWATER CS-137 < 2.2 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 2.7 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 2.5 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 3.0 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 4.6 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 2.3 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 7.1 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.7 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.253 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 4.3 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 3.0 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 3.1 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 2.4 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 2.1 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 5.0 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 2.7 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 2.7 2021 Annual Radiological Environmental Operating Report Page C - 37 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: J-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.8 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.393 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 3.0 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 2.0 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 3.0 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 38 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: J-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 2.7 09-Mar-21 OFFSITE GROUNDWATER MN-54 < 3.2 Duplicate 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 4.0 Duplicate 09-Mar-21 OFFSITE GROUNDWATER CO-58 < 3.3 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 7.4 Duplicate 09-Mar-21 OFFSITE GROUNDWATER FE-59 < 5.3 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 2.6 09-Mar-21 OFFSITE GROUNDWATER CO-60 < 2.9 Duplicate 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 6.5 Duplicate 09-Mar-21 OFFSITE GROUNDWATER ZN-65 < 5.1 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 3.3 09-Mar-21 OFFSITE GROUNDWATER ZR-NB-95 < 5.6 Duplicate 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.344 09-Mar-21 OFFSITE GROUNDWATER I-131 < 0.452 Duplicate 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 3.8 Duplicate 09-Mar-21 OFFSITE GROUNDWATER CS-134 < 3.3 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 2.9 Duplicate 09-Mar-21 OFFSITE GROUNDWATER CS-137 < 2.2 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 3.3 Duplicate 09-Mar-21 OFFSITE GROUNDWATER BA-LA-140 < 4.3 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 Duplicate 09-Mar-21 OFFSITE GROUNDWATER H-3 < 158.0 26-May-21 OFFSITE GROUNDWATER MN-54 < 3.9 26-May-21 OFFSITE GROUNDWATER CO-58 < 4.6 26-May-21 OFFSITE GROUNDWATER FE-59 < 7.4 26-May-21 OFFSITE GROUNDWATER CO-60 < 2.5 26-May-21 OFFSITE GROUNDWATER ZN-65 < 6.7 26-May-21 OFFSITE GROUNDWATER ZR-NB-95 < 4.2 26-May-21 OFFSITE GROUNDWATER I-131 < 0.439 26-May-21 OFFSITE GROUNDWATER CS-134 < 4.6 26-May-21 OFFSITE GROUNDWATER CS-137 < 3.6 26-May-21 OFFSITE GROUNDWATER BA-LA-140 < 5.1 26-May-21 OFFSITE GROUNDWATER H-3 < 165.0 11-Aug-21 OFFSITE GROUNDWATER MN-54 < 1.7 11-Aug-21 OFFSITE GROUNDWATER CO-58 < 2.2 11-Aug-21 OFFSITE GROUNDWATER FE-59 < 3.7 11-Aug-21 OFFSITE GROUNDWATER CO-60 < 2.3 11-Aug-21 OFFSITE GROUNDWATER ZN-65 < 6.3 2021 Annual Radiological Environmental Operating Report Page C - 39 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Ground Water Location: J-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 11-Aug-21 OFFSITE GROUNDWATER ZR-NB-95 < 2.4 11-Aug-21 OFFSITE GROUNDWATER I-131 < 0.234 11-Aug-21 OFFSITE GROUNDWATER CS-134 < 3.5 11-Aug-21 OFFSITE GROUNDWATER CS-137 < 3.8 11-Aug-21 OFFSITE GROUNDWATER BA-LA-140 < 2.7 11-Aug-21 OFFSITE GROUNDWATER H-3 < 157.0 26-Oct-21 OFFSITE GROUNDWATER MN-54 < 2.8 26-Oct-21 OFFSITE GROUNDWATER CO-58 < 2.1 26-Oct-21 OFFSITE GROUNDWATER FE-59 < 5.6 26-Oct-21 OFFSITE GROUNDWATER CO-60 < 2.5 26-Oct-21 OFFSITE GROUNDWATER ZN-65 < 8.0 26-Oct-21 OFFSITE GROUNDWATER ZR-NB-95 < 5.6 26-Oct-21 OFFSITE GROUNDWATER I-131 < 0.241 26-Oct-21 OFFSITE GROUNDWATER CS-134 < 4.7 26-Oct-21 OFFSITE GROUNDWATER CS-137 < 3.0 26-Oct-21 OFFSITE GROUNDWATER BA-LA-140 < 2.7 26-Oct-21 OFFSITE GROUNDWATER H-3 < 163.0 2021 Annual Radiological Environmental Operating Report Page C - 40 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 07-Jan-21 MN-54 < 2.4 07-Jan-21 CO-58 < 3.6 07-Jan-21 FE-59 < 9.7 07-Jan-21 CO-60 < 3.3 07-Jan-21 ZN-65 < 11.6 07-Jan-21 ZR-NB-95 < 2.8 07-Jan-21 I-131 < 0.397 07-Jan-21 CS-134 < 4.9 07-Jan-21 CS-137 < 3.4 07-Jan-21 BA-LA-140 < 2.5 07-Jan-21 GROSS BETA 3.100 +/- 0.676 02-Feb-21 MN-54 < 2.6 02-Feb-21 CO-58 < 1.8 02-Feb-21 FE-59 < 5.1 02-Feb-21 CO-60 < 2.3 02-Feb-21 ZN-65 < 1.9 02-Feb-21 ZR-NB-95 < 2.3 02-Feb-21 I-131 < 0.43 02-Feb-21 CS-134 < 3.2 02-Feb-21 CS-137 < 2.4 02-Feb-21 BA-LA-140 < 3.2 02-Feb-21 GROSS BETA 2.014 +/- 0.604 02-Mar-21 MN-54 < 3.8 02-Mar-21 CO-58 < 2.1 02-Mar-21 FE-59 < 4.1 02-Mar-21 CO-60 < 2.3 02-Mar-21 ZN-65 < 3.6 02-Mar-21 ZR-NB-95 < 2.7 02-Mar-21 I-131 < 0.34 02-Mar-21 CS-134 < 4.0 02-Mar-21 CS-137 < 3.7 02-Mar-21 BA-LA-140 < 2.0 02-Mar-21 GROSS BETA 2.226 +/- 0.615 01-Apr-21 MN-54 < 2.2 01-Apr-21 CO-58 < 3.8 01-Apr-21 FE-59 < 3.7 01-Apr-21 CO-60 < 3.0 01-Apr-21 ZN-65 < 5.1 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 41

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Apr-21 ZR-NB-95 < 3.9 01-Apr-21 I-131 < 0.402 01-Apr-21 CS-134 < 4.2 01-Apr-21 CS-137 < 4.0 01-Apr-21 BA-LA-140 < 3.3 01-Apr-21 GROSS BETA 3.286 +/- 0.705 03-May-21 MN-54 < 3.5 03-May-21 CO-58 < 2.9 03-May-21 FE-59 < 3.6 03-May-21 CO-60 < 2.1 03-May-21 ZN-65 < 4.3 03-May-21 ZR-NB-95 < 3.3 03-May-21 I-131 < 0.365 03-May-21 CS-134 < 3.6 03-May-21 CS-137 < 3.0 03-May-21 BA-LA-140 < 3.8 03-May-21 GROSS BETA 3.141 +/- 0.688 02-Jun-21 MN-54 < 3.1 02-Jun-21 CO-58 < 3.1 02-Jun-21 FE-59 < 4.9 02-Jun-21 CO-60 < 2.0 02-Jun-21 ZN-65 < 6.1 02-Jun-21 ZR-NB-95 < 2.3 02-Jun-21 I-131 < 0.234 02-Jun-21 CS-134 < 3.6 02-Jun-21 CS-137 < 3.8 02-Jun-21 BA-LA-140 < 2.3 02-Jun-21 GROSS BETA 2.827 +/- 0.672 01-Jul-21 MN-54 < 2.2 01-Jul-21 CO-58 < 3.6 01-Jul-21 FE-59 < 3.0 01-Jul-21 CO-60 < 3.0 01-Jul-21 ZN-65 < 4.5 01-Jul-21 ZR-NB-95 < 3.5 01-Jul-21 I-131 < 0.308 01-Jul-21 CS-134 < 3.9 01-Jul-21 CS-137 < 2.9 01-Jul-21 BA-LA-140 < 3.1 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 42

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Jul-21 GROSS BETA 3.906 +/- 0.746 03-Aug-21 MN-54 < 2.9 03-Aug-21 CO-58 < 2.8 03-Aug-21 FE-59 < 6.1 03-Aug-21 CO-60 < 2.6 03-Aug-21 ZN-65 < 5.9 03-Aug-21 ZR-NB-95 < 4.1 03-Aug-21 I-131 < 0.3 03-Aug-21 CS-134 < 4.6 03-Aug-21 CS-137 < 5.0 03-Aug-21 BA-LA-140 < 3.0 03-Aug-21 GROSS BETA 2.686 +/- 0.638 01-Sep-21 MN-54 < 2.6 01-Sep-21 CO-58 < 2.0 01-Sep-21 FE-59 < 4.0 01-Sep-21 CO-60 < 2.0 01-Sep-21 ZN-65 < 1.7 01-Sep-21 ZR-NB-95 < 2.3 01-Sep-21 I-131 < 0.284 01-Sep-21 CS-134 < 2.6 01-Sep-21 CS-137 < 2.0 01-Sep-21 BA-LA-140 < 2.9 01-Sep-21 GROSS BETA 2.181 +/- 0.612 04-Oct-21 MN-54 < 3.1 04-Oct-21 CO-58 < 3.5 04-Oct-21 FE-59 < 4.3 04-Oct-21 CO-60 < 1.5 04-Oct-21 ZN-65 < 4.4 04-Oct-21 ZR-NB-95 < 2.4 04-Oct-21 I-131 < 0.255 04-Oct-21 CS-134 < 3.1 04-Oct-21 CS-137 < 2.8 04-Oct-21 BA-LA-140 < 2.1 04-Oct-21 GROSS BETA 2.404 +/- 0.64 01-Nov-21 MN-54 < 2.5 01-Nov-21 CO-58 < 1.5 01-Nov-21 FE-59 < 4.4 01-Nov-21 CO-60 < 2.7 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 43

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Nov-21 ZN-65 < 3.4 01-Nov-21 ZR-NB-95 < 3.3 01-Nov-21 I-131 < 0.381 01-Nov-21 CS-134 < 4.6 01-Nov-21 CS-137 < 3.9 01-Nov-21 BA-LA-140 < 1.6 01-Nov-21 GROSS BETA 3.106 +/- 0.689 02-Dec-21 MN-54 < 2.7 02-Dec-21 CO-58 < 2.6 02-Dec-21 FE-59 < 3.9 02-Dec-21 CO-60 < 2.3 02-Dec-21 ZN-65 < 6.3 02-Dec-21 ZR-NB-95 < 4.1 02-Dec-21 I-131 < 0.33 02-Dec-21 CS-134 < 3.1 02-Dec-21 CS-137 < 2.9 02-Dec-21 BA-LA-140 < 1.1 02-Dec-21 GROSS BETA 3.530 +/- 0.718 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 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 44

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 07-Jan-21 MN-54 < 2.8 07-Jan-21 CO-58 < 2.5 07-Jan-21 FE-59 < 6.2 07-Jan-21 CO-60 < 3.1 07-Jan-21 ZN-65 < 5.2 07-Jan-21 ZR-NB-95 < 2.6 07-Jan-21 I-131 < 0.307 07-Jan-21 CS-134 < 3.9 07-Jan-21 CS-137 < 4.0 07-Jan-21 BA-LA-140 < 2.2 07-Jan-21 GROSS BETA 2.680 +/- 0.684 02-Feb-21 MN-54 < 4.9 02-Feb-21 CO-58 < 3.0 02-Feb-21 FE-59 < 11.6 02-Feb-21 CO-60 < 6.2 02-Feb-21 ZN-65 < 15.8 02-Feb-21 ZR-NB-95 < 7.8 02-Feb-21 I-131 < 0.426 02-Feb-21 CS-134 < 6.1 02-Feb-21 CS-137 < 3.8 02-Feb-21 BA-LA-140 < 2.8 02-Feb-21 GROSS BETA 2.420 +/- 0.661 02-Mar-21 MN-54 < 1.9 02-Mar-21 CO-58 < 2.6 02-Mar-21 FE-59 < 3.2 02-Mar-21 CO-60 < 2.4 02-Mar-21 ZN-65 < 3.2 02-Mar-21 ZR-NB-95 < 2.8 02-Mar-21 I-131 < 0.291 02-Mar-21 CS-134 < 3.4 02-Mar-21 CS-137 < 2.9 02-Mar-21 BA-LA-140 < 5.2 02-Mar-21 GROSS BETA 2.720 +/- 0.68 01-Apr-21 MN-54 < 2.2 01-Apr-21 CO-58 < 2.3 01-Apr-21 FE-59 < 6.2 01-Apr-21 CO-60 < 2.0 01-Apr-21 ZN-65 < 4.6 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 45

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Apr-21 ZR-NB-95 < 2.4 01-Apr-21 I-131 < 0.402 01-Apr-21 CS-134 < 3.0 01-Apr-21 CS-137 < 3.2 01-Apr-21 BA-LA-140 < 4.3 01-Apr-21 GROSS BETA 3.450 +/- 0.726 03-May-21 MN-54 < 2.7 03-May-21 CO-58 < 2.9 03-May-21 FE-59 < 3.0 03-May-21 CO-60 < 2.3 03-May-21 ZN-65 < 3.0 03-May-21 ZR-NB-95 < 3.5 03-May-21 I-131 < 0.359 03-May-21 CS-134 < 3.8 03-May-21 CS-137 < 2.7 03-May-21 BA-LA-140 < 3.2 03-May-21 GROSS BETA 3.091 +/- 0.755 02-Jun-21 MN-54 < 3.4 02-Jun-21 CO-58 < 1.5 02-Jun-21 FE-59 < 4.7 02-Jun-21 CO-60 < 2.3 02-Jun-21 ZN-65 < 3.7 02-Jun-21 ZR-NB-95 < 3.0 02-Jun-21 I-131 < 0.248 02-Jun-21 CS-134 < 3.3 02-Jun-21 CS-137 < 3.5 02-Jun-21 BA-LA-140 < 2.1 02-Jun-21 GROSS BETA 2.883 +/- 0.719 01-Jul-21 MN-54 < 2.1 01-Jul-21 CO-58 < 2.0 01-Jul-21 FE-59 < 2.3 01-Jul-21 CO-60 < 1.8 01-Jul-21 ZN-65 < 3.0 01-Jul-21 ZR-NB-95 < 2.1 01-Jul-21 I-131 < 0.306 01-Jul-21 CS-134 < 3.0 01-Jul-21 CS-137 < 3.2 01-Jul-21 BA-LA-140 < 1.3 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 46

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Jul-21 GROSS BETA 2.528 +/- 0.653 03-Aug-21 MN-54 < 2.7 03-Aug-21 CO-58 < 3.6 03-Aug-21 FE-59 < 4.4 03-Aug-21 CO-60 < 2.3 03-Aug-21 ZN-65 < 5.8 03-Aug-21 ZR-NB-95 < 2.2 03-Aug-21 I-131 < 0.274 03-Aug-21 CS-134 < 3.9 03-Aug-21 CS-137 < 3.3 03-Aug-21 BA-LA-140 < 1.8 03-Aug-21 GROSS BETA 3.203 +/- 0.715 01-Sep-21 MN-54 < 1.6 01-Sep-21 CO-58 < 2.0 01-Sep-21 FE-59 < 4.5 01-Sep-21 CO-60 < 2.7 01-Sep-21 ZN-65 < 2.3 01-Sep-21 ZR-NB-95 < 3.2 01-Sep-21 I-131 < 0.281 01-Sep-21 CS-134 < 2.9 01-Sep-21 CS-137 < 2.3 01-Sep-21 BA-LA-140 < 5.6 01-Sep-21 GROSS BETA 2.704 +/- 0.681 04-Oct-21 MN-54 < 3.6 04-Oct-21 CO-58 < 3.2 04-Oct-21 FE-59 < 8.5 04-Oct-21 CO-60 < 3.0 04-Oct-21 ZN-65 < 9.2 04-Oct-21 ZR-NB-95 < 3.5 04-Oct-21 I-131 < 0.243 04-Oct-21 CS-134 < 5.2 04-Oct-21 CS-137 < 3.3 04-Oct-21 BA-LA-140 < 5.2 04-Oct-21 GROSS BETA 1.829 +/- 0.603 01-Nov-21 MN-54 < 1.6 01-Nov-21 CO-58 < 2.0 01-Nov-21 FE-59 < 3.8 01-Nov-21 CO-60 < 2.5 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 47

Enclosure I Exposure Pathway - Waterborne Drinking Water Location: IO-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 01-Nov-21 ZN-65 < 3.0 01-Nov-21 ZR-NB-95 < 2.2 01-Nov-21 I-131 < 0.245 01-Nov-21 CS-134 < 3.2 01-Nov-21 CS-137 < 3.9 01-Nov-21 BA-LA-140 < 1.2 01-Nov-21 GROSS BETA 3.273 +/- 0.73 02-Dec-21 MN-54 < 2.6 02-Dec-21 CO-58 < 3.1 02-Dec-21 FE-59 < 7.0 02-Dec-21 CO-60 < 2.6 02-Dec-21 ZN-65 < 2.9 02-Dec-21 ZR-NB-95 < 2.2 02-Dec-21 I-131 < 0.314 02-Dec-21 CS-134 < 2.8 02-Dec-21 CS-137 < 3.2 02-Dec-21 BA-LA-140 < 3.3 02-Dec-21 GROSS BETA 3.688 +/- 0.758 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 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 48

Enclosure I Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 07-Jan-21 H-3 < 165 01-Apr-21 H-3 181 +/- 84 01-Apr-21 H-3 < 159 02-Jun-21 H-3 < 157 01-Jul-21 H-3 < 159 04-Oct-21 H-3 < 159 04-Oct-21 H-3 < 159 Duplicate 05-Jan-22 H-3 < 157 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 49

Enclosure I Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: IO-DW Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 07-Jan-21 H-3 < 165 01-Apr-21 H-3 < 156 01-Jul-21 H-3 < 159 04-Oct-21 H-3 < 156 05-Jan-22 H-3 179 +/- 85 05-Jan-22 H-3 < 203 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 50

Enclosure I Exposure Pathway - Waterborne Shoreline Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 05-May-21 SHORELINE SEDIMENTS K-40 5,938.0 +/- 509.7 05-May-21 SHORELINE SEDIMENTS MN-54 < 29.0 05-May-21 SHORELINE SEDIMENTS CO-58 < 18.0 05-May-21 SHORELINE SEDIMENTS FE-59 < 29.7 05-May-21 SHORELINE SEDIMENTS CO-60 < 18.7 05-May-21 SHORELINE SEDIMENTS ZN-65 < 55.6 05-May-21 SHORELINE SEDIMENTS CS-134 < 17.6 05-May-21 SHORELINE SEDIMENTS CS-137 < 22.4 09-Nov-21 SHORELINE SEDIMENTS K-40 6,926.5 +/- 635.9 09-Nov-21 SHORELINE SEDIMENTS MN-54 < 29.3 09-Nov-21 SHORELINE SEDIMENTS CO-58 < 25.4 09-Nov-21 SHORELINE SEDIMENTS FE-59 < 42.7 09-Nov-21 SHORELINE SEDIMENTS CO-60 < 29.8 09-Nov-21 SHORELINE SEDIMENTS ZN-65 < 63.7 09-Nov-21 SHORELINE SEDIMENTS CS-134 < 27.5 09-Nov-21 SHORELINE SEDIMENTS CS-137 < 24.4 2021 Annual Radiological Environmental Operating Report Page C - 51 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Waterborne Shoreline Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 05-May-21 SHORELINE SEDIMENTS K-40 9,184.2 +/- 676.1 05-May-21 SHORELINE SEDIMENTS MN-54 < 30.1 05-May-21 SHORELINE SEDIMENTS CO-58 < 23.1 05-May-21 SHORELINE SEDIMENTS FE-59 < 65.2 05-May-21 SHORELINE SEDIMENTS CO-60 < 14.0 05-May-21 SHORELINE SEDIMENTS ZN-65 < 46.9 05-May-21 SHORELINE SEDIMENTS CS-134 < 17.1 05-May-21 SHORELINE SEDIMENTS CS-137 < 33.8 01-Dec-21 SHORELINE SEDIMENTS K-40 8,697.2 +/- 1,006.0 01-Dec-21 SHORELINE SEDIMENTS MN-54 < 63.5 01-Dec-21 SHORELINE SEDIMENTS CO-58 < 52.2 01-Dec-21 SHORELINE SEDIMENTS FE-59 < 104.2 01-Dec-21 SHORELINE SEDIMENTS CO-60 < 56.9 01-Dec-21 SHORELINE SEDIMENTS ZN-65 < 124.1 01-Dec-21 SHORELINE SEDIMENTS CS-134 < 43.3 01-Dec-21 SHORELINE SEDIMENTS CS-137 < 55.7 2021 Annual Radiological Environmental Operating Report Page C - 52 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 25-Mar-21 CHANNEL CATFISH K-40 4,694.8 +/- 544.4 25-Mar-21 CHANNEL CATFISH MN-54 < 17.5 25-Mar-21 CHANNEL CATFISH CO-58 < 14.8 25-Mar-21 CHANNEL CATFISH FE-59 < 41.0 25-Mar-21 CHANNEL CATFISH CO-60 < 11.7 25-Mar-21 CHANNEL CATFISH ZN-65 < 47.6 25-Mar-21 CHANNEL CATFISH I-131 < 35.9 25-Mar-21 CHANNEL CATFISH CS-134 < 20.3 25-Mar-21 CHANNEL CATFISH CS-137 < 18.7 25-Mar-21 CHANNEL CATFISH H-3 9,293.0 +/- 265.0 25-Mar-21 COMMON CARP K-40 3,627.0 +/- 491.9 25-Mar-21 COMMON CARP MN-54 < 20.9 25-Mar-21 COMMON CARP CO-58 < 22.7 25-Mar-21 COMMON CARP FE-59 < 29.4 25-Mar-21 COMMON CARP CO-60 < 11.8 25-Mar-21 COMMON CARP ZN-65 < 48.8 25-Mar-21 COMMON CARP I-131 < 24.7 25-Mar-21 COMMON CARP CS-134 < 17.3 25-Mar-21 COMMON CARP CS-137 < 22.6 25-Mar-21 COMMON CARP H-3 9,634.0 +/- 269.0 25-Mar-21 CRAPPIE K-40 3,678.7 +/- 494.7 25-Mar-21 CRAPPIE MN-54 < 19.8 25-Mar-21 CRAPPIE CO-58 < 14.3 25-Mar-21 CRAPPIE FE-59 < 29.8 25-Mar-21 CRAPPIE CO-60 < 8.4 25-Mar-21 CRAPPIE ZN-65 < 39.7 25-Mar-21 CRAPPIE I-131 < 30.3 25-Mar-21 CRAPPIE CS-134 < 20.8 25-Mar-21 CRAPPIE CS-137 < 17.6 25-Mar-21 CRAPPIE H-3 9,720.0 +/- 271.0 25-Mar-21 SMALLMOUTH BUFFALO K-40 2,682.7 +/- 469.0 25-Mar-21 SMALLMOUTH BUFFALO MN-54 < 13.6 25-Mar-21 SMALLMOUTH BUFFALO CO-58 < 15.7 25-Mar-21 SMALLMOUTH BUFFALO FE-59 < 19.7 25-Mar-21 SMALLMOUTH BUFFALO CO-60 < 14.8 25-Mar-21 SMALLMOUTH BUFFALO ZN-65 < 24.0 25-Mar-21 SMALLMOUTH BUFFALO I-131 < 31.9 25-Mar-21 SMALLMOUTH BUFFALO CS-134 < 17.5 2021 Annual Radiological Environmental Operating Report Page C - 53 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 25-Mar-21 SMALLMOUTH BUFFALO CS-137 < 13.0 25-Mar-21 SMALLMOUTH BUFFALO H-3 9,947.0 +/- 277.0 02-Nov-21 BLUE CATFISH K-40 3,966.9 +/- 498.5 02-Nov-21 BLUE CATFISH MN-54 < 22.2 02-Nov-21 BLUE CATFISH CO-58 < 20.9 02-Nov-21 BLUE CATFISH FE-59 < 47.6 02-Nov-21 BLUE CATFISH CO-60 < 14.2 02-Nov-21 BLUE CATFISH ZN-65 < 52.6 02-Nov-21 BLUE CATFISH I-131 < 78.6 02-Nov-21 BLUE CATFISH CS-134 < 24.2 02-Nov-21 BLUE CATFISH CS-137 < 17.1 02-Nov-21 BLUE CATFISH H-3 6,709.0 +/- 235.0 02-Nov-21 CHANNEL CATFISH K-40 4,006.2 +/- 473.9 02-Nov-21 CHANNEL CATFISH MN-54 < 18.2 02-Nov-21 CHANNEL CATFISH CO-58 < 15.0 02-Nov-21 CHANNEL CATFISH FE-59 < 36.5 02-Nov-21 CHANNEL CATFISH CO-60 < 14.4 02-Nov-21 CHANNEL CATFISH ZN-65 < 32.1 02-Nov-21 CHANNEL CATFISH I-131 < 42.3 02-Nov-21 CHANNEL CATFISH CS-134 < 17.3 02-Nov-21 CHANNEL CATFISH CS-137 < 18.5 02-Nov-21 CHANNEL CATFISH H-3 6,553.0 +/- 230.0 02-Nov-21 COMMON CARP K-40 3,576.5 +/- 504.5 02-Nov-21 COMMON CARP MN-54 < 14.8 02-Nov-21 COMMON CARP CO-58 < 17.3 02-Nov-21 COMMON CARP FE-59 < 36.2 02-Nov-21 COMMON CARP CO-60 < 11.6 02-Nov-21 COMMON CARP ZN-65 < 31.1 02-Nov-21 COMMON CARP I-131 < 69.3 02-Nov-21 COMMON CARP CS-134 < 19.8 02-Nov-21 COMMON CARP CS-137 < 11.1 02-Nov-21 COMMON CARP H-3 7,098.0 +/- 244.0 02-Nov-21 CRAPPIE K-40 3,590.8 +/- 485.5 02-Nov-21 CRAPPIE MN-54 < 20.7 02-Nov-21 CRAPPIE CO-58 < 16.5 02-Nov-21 CRAPPIE FE-59 < 43.2 02-Nov-21 CRAPPIE CO-60 < 19.8 02-Nov-21 CRAPPIE ZN-65 < 27.7 2021 Annual Radiological Environmental Operating Report Page C - 54 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 02-Nov-21 CRAPPIE I-131 < 47.5 02-Nov-21 CRAPPIE CS-134 < 21.1 02-Nov-21 CRAPPIE CS-137 < 17.2 02-Nov-21 CRAPPIE H-3 5,870.0 +/- 213.0 02-Nov-21 RIVER CARP SUCKER K-40 3,388.8 +/- 435.5 02-Nov-21 RIVER CARP SUCKER MN-54 < 17.4 02-Nov-21 RIVER CARP SUCKER CO-58 < 17.5 02-Nov-21 RIVER CARP SUCKER FE-59 < 27.8 02-Nov-21 RIVER CARP SUCKER CO-60 < 14.7 02-Nov-21 RIVER CARP SUCKER ZN-65 < 30.9 02-Nov-21 RIVER CARP SUCKER I-131 < 53.5 02-Nov-21 RIVER CARP SUCKER CS-134 < 18.3 02-Nov-21 RIVER CARP SUCKER CS-137 < 19.4 02-Nov-21 RIVER CARP SUCKER H-3 6,413.0 +/- 216.0 02-Nov-21 SMALLMOUTH BUFFALO K-40 2,959.9 +/- 445.5 02-Nov-21 SMALLMOUTH BUFFALO MN-54 < 11.3 02-Nov-21 SMALLMOUTH BUFFALO CO-58 < 16.2 02-Nov-21 SMALLMOUTH BUFFALO FE-59 < 34.5 02-Nov-21 SMALLMOUTH BUFFALO CO-60 < 14.9 02-Nov-21 SMALLMOUTH BUFFALO ZN-65 < 21.2 02-Nov-21 SMALLMOUTH BUFFALO I-131 < 48.9 02-Nov-21 SMALLMOUTH BUFFALO CS-134 < 17.7 02-Nov-21 SMALLMOUTH BUFFALO CS-137 < 15.4 02-Nov-21 SMALLMOUTH BUFFALO H-3 4,597.0 +/- 171.0 02-Nov-21 WHITE BASS K-40 3,112.6 +/- 418.0 02-Nov-21 WHITE BASS MN-54 < 12.2 02-Nov-21 WHITE BASS CO-58 < 9.8 02-Nov-21 WHITE BASS FE-59 < 17.5 02-Nov-21 WHITE BASS CO-60 < 14.6 02-Nov-21 WHITE BASS ZN-65 < 26.2 02-Nov-21 WHITE BASS I-131 < 55.0 02-Nov-21 WHITE BASS CS-134 < 15.1 02-Nov-21 WHITE BASS CS-137 < 16.2 02-Nov-21 WHITE BASS H-3 8,063.0 +/- 260.0 02-Nov-21 WIPER K-40 3,856.2 +/- 480.0 02-Nov-21 WIPER MN-54 < 14.9 02-Nov-21 WIPER CO-58 < 20.7 02-Nov-21 WIPER FE-59 < 30.8 2021 Annual Radiological Environmental Operating Report Page C - 55 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 02-Nov-21 WIPER CO-60 < 23.8 02-Nov-21 WIPER ZN-65 < 33.9 02-Nov-21 WIPER I-131 < 53.8 02-Nov-21 WIPER CS-134 < 19.5 02-Nov-21 WIPER CS-137 < 22.0 02-Nov-21 WIPER H-3 6,316.0 +/- 220.0 2021 Annual Radiological Environmental Operating Report Page C - 56 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 27-Apr-21 BIGMOUTH BUFFALO K-40 4,025.0 +/- 482.4 Duplicate 27-Apr-21 BIGMOUTH BUFFALO K-40 3,567.5 +/- 486.1 27-Apr-21 BIGMOUTH BUFFALO MN-54 < 12.0 Duplicate 27-Apr-21 BIGMOUTH BUFFALO MN-54 < 15.4 27-Apr-21 BIGMOUTH BUFFALO CO-58 < 15.8 Duplicate 27-Apr-21 BIGMOUTH BUFFALO CO-58 < 16.1 27-Apr-21 BIGMOUTH BUFFALO FE-59 < 19.8 Duplicate 27-Apr-21 BIGMOUTH BUFFALO FE-59 < 29.7 27-Apr-21 BIGMOUTH BUFFALO CO-60 < 13.1 Duplicate 27-Apr-21 BIGMOUTH BUFFALO CO-60 < 15.6 27-Apr-21 BIGMOUTH BUFFALO ZN-65 < 34.1 27-Apr-21 BIGMOUTH BUFFALO ZN-65 < 17.9 Duplicate 27-Apr-21 BIGMOUTH BUFFALO I-131 < 54.2 Duplicate 27-Apr-21 BIGMOUTH BUFFALO I-131 < 40.8 27-Apr-21 BIGMOUTH BUFFALO CS-134 < 19.7 Duplicate 27-Apr-21 BIGMOUTH BUFFALO CS-134 < 18.3 27-Apr-21 BIGMOUTH BUFFALO CS-137 < 13.5 27-Apr-21 BIGMOUTH BUFFALO CS-137 < 10.1 Duplicate 27-Apr-21 BIGMOUTH BUFFALO H-3 < 125.0 Duplicate 27-Apr-21 BIGMOUTH BUFFALO H-3 < 125.0 27-Apr-21 CHANNEL CATFISH K-40 3,836.3 +/- 433.4 27-Apr-21 CHANNEL CATFISH MN-54 < 12.5 27-Apr-21 CHANNEL CATFISH CO-58 < 7.7 27-Apr-21 CHANNEL CATFISH FE-59 < 31.5 27-Apr-21 CHANNEL CATFISH CO-60 < 12.8 27-Apr-21 CHANNEL CATFISH ZN-65 < 11.8 27-Apr-21 CHANNEL CATFISH I-131 < 23.8 27-Apr-21 CHANNEL CATFISH CS-134 < 12.9 27-Apr-21 CHANNEL CATFISH CS-137 < 15.3 27-Apr-21 CHANNEL CATFISH H-3 < 126.0 27-Apr-21 COMMON CARP K-40 3,503.2 +/- 402.1 27-Apr-21 COMMON CARP MN-54 < 11.5 27-Apr-21 COMMON CARP CO-58 < 11.6 27-Apr-21 COMMON CARP FE-59 < 30.7 27-Apr-21 COMMON CARP CO-60 < 16.9 27-Apr-21 COMMON CARP ZN-65 < 24.3 27-Apr-21 COMMON CARP I-131 < 29.5 27-Apr-21 COMMON CARP CS-134 < 17.7 2021 Annual Radiological Environmental Operating Report Page C - 57 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 27-Apr-21 COMMON CARP CS-137 < 12.5 27-Apr-21 COMMON CARP H-3 < 123.0 27-Apr-21 CRAPPIE K-40 3,507.3 +/- 452.7 27-Apr-21 CRAPPIE MN-54 < 16.1 27-Apr-21 CRAPPIE CO-58 < 15.6 27-Apr-21 CRAPPIE FE-59 < 33.4 27-Apr-21 CRAPPIE CO-60 < 12.5 27-Apr-21 CRAPPIE ZN-65 < 21.5 27-Apr-21 CRAPPIE I-131 < 33.3 27-Apr-21 CRAPPIE CS-134 < 18.6 27-Apr-21 CRAPPIE CS-137 < 14.8 27-Apr-21 CRAPPIE H-3 < 125.0 27-Apr-21 FRESHWATER DRUM K-40 3,594.7 +/- 423.9 27-Apr-21 FRESHWATER DRUM MN-54 < 15.4 27-Apr-21 FRESHWATER DRUM CO-58 < 13.1 27-Apr-21 FRESHWATER DRUM FE-59 < 8.3 27-Apr-21 FRESHWATER DRUM CO-60 < 11.1 27-Apr-21 FRESHWATER DRUM ZN-65 < 22.8 27-Apr-21 FRESHWATER DRUM I-131 < 30.9 27-Apr-21 FRESHWATER DRUM CS-134 < 13.9 27-Apr-21 FRESHWATER DRUM CS-137 < 9.6 27-Apr-21 FRESHWATER DRUM H-3 < 125.0 27-Apr-21 SMALLMOUTH BUFFALO K-40 3,193.0 +/- 459.7 27-Apr-21 SMALLMOUTH BUFFALO MN-54 < 15.5 27-Apr-21 SMALLMOUTH BUFFALO CO-58 < 12.1 27-Apr-21 SMALLMOUTH BUFFALO FE-59 < 28.4 27-Apr-21 SMALLMOUTH BUFFALO CO-60 < 14.9 27-Apr-21 SMALLMOUTH BUFFALO ZN-65 < 19.3 27-Apr-21 SMALLMOUTH BUFFALO I-131 < 28.5 27-Apr-21 SMALLMOUTH BUFFALO CS-134 < 15.2 27-Apr-21 SMALLMOUTH BUFFALO CS-137 < 7.6 27-Apr-21 SMALLMOUTH BUFFALO H-3 < 126.0 22-Oct-21 BLUE CATFISH K-40 2,456.8 +/- 482.8 22-Oct-21 BLUE CATFISH MN-54 < 22.8 22-Oct-21 BLUE CATFISH CO-58 < 21.2 22-Oct-21 BLUE CATFISH FE-59 < 36.7 22-Oct-21 BLUE CATFISH CO-60 < 11.4 22-Oct-21 BLUE CATFISH ZN-65 < 33.5 2021 Annual Radiological Environmental Operating Report Page C - 58 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 22-Oct-21 BLUE CATFISH I-131 < 84.8 22-Oct-21 BLUE CATFISH CS-134 < 20.9 22-Oct-21 BLUE CATFISH CS-137 < 21.1 22-Oct-21 BLUE CATFISH H-3 < 131.0 22-Oct-21 CHANNEL CATFISH K-40 3,334.8 +/- 423.9 22-Oct-21 CHANNEL CATFISH MN-54 < 17.5 22-Oct-21 CHANNEL CATFISH CO-58 < 10.3 22-Oct-21 CHANNEL CATFISH FE-59 < 24.6 22-Oct-21 CHANNEL CATFISH CO-60 < 7.8 22-Oct-21 CHANNEL CATFISH ZN-65 < 34.6 22-Oct-21 CHANNEL CATFISH I-131 < 44.1 22-Oct-21 CHANNEL CATFISH CS-134 < 17.7 22-Oct-21 CHANNEL CATFISH CS-137 < 13.0 22-Oct-21 CHANNEL CATFISH H-3 < 132.0 22-Oct-21 CRAPPIE K-40 3,348.7 +/- 427.7 22-Oct-21 CRAPPIE MN-54 < 10.0 22-Oct-21 CRAPPIE CO-58 < 16.3 22-Oct-21 CRAPPIE FE-59 < 43.1 22-Oct-21 CRAPPIE CO-60 < 11.2 22-Oct-21 CRAPPIE ZN-65 < 35.1 22-Oct-21 CRAPPIE I-131 < 61.6 22-Oct-21 CRAPPIE CS-134 < 14.7 22-Oct-21 CRAPPIE CS-137 < 14.4 22-Oct-21 CRAPPIE H-3 < 141.0 22-Oct-21 WHITE BASS K-40 3,447.0 +/- 463.4 22-Oct-21 WHITE BASS MN-54 < 14.3 22-Oct-21 WHITE BASS CO-58 < 14.6 22-Oct-21 WHITE BASS FE-59 < 41.4 22-Oct-21 WHITE BASS CO-60 < 15.2 22-Oct-21 WHITE BASS ZN-65 < 28.9 22-Oct-21 WHITE BASS I-131 < 52.4 22-Oct-21 WHITE BASS CS-134 < 19.6 22-Oct-21 WHITE BASS CS-137 < 13.7 22-Oct-21 WHITE BASS H-3 < 128.0 2021 Annual Radiological Environmental Operating Report Page C - 59 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Apr-21 HORSERADISH LEAVES BE-7 776.2 +/- 259.9 19-Apr-21 HORSERADISH LEAVES K-40 5,142.6 +/- 611.2 19-Apr-21 HORSERADISH LEAVES MN-54 < 19.4 19-Apr-21 HORSERADISH LEAVES CO-58 < 22.1 19-Apr-21 HORSERADISH LEAVES FE-59 < 43.2 19-Apr-21 HORSERADISH LEAVES CO-60 < 16.3 19-Apr-21 HORSERADISH LEAVES ZN-65 < 23.3 19-Apr-21 HORSERADISH LEAVES ZR-NB-95 < 17.5 19-Apr-21 HORSERADISH LEAVES I-131 < 30.6 19-Apr-21 HORSERADISH LEAVES CS-134 < 27.1 19-Apr-21 HORSERADISH LEAVES CS-137 < 17.2 17-May-21 HORSERADISH LEAVES BE-7 798.2 +/- 289.5 17-May-21 HORSERADISH LEAVES K-40 4,509.7 +/- 576.9 17-May-21 HORSERADISH LEAVES MN-54 < 21.5 17-May-21 HORSERADISH LEAVES CO-58 < 22.8 17-May-21 HORSERADISH LEAVES FE-59 < 40.9 17-May-21 HORSERADISH LEAVES CO-60 < 22.8 17-May-21 HORSERADISH LEAVES ZN-65 < 51.7 17-May-21 HORSERADISH LEAVES ZR-NB-95 < 19.9 17-May-21 HORSERADISH LEAVES I-131 < 17.3 17-May-21 HORSERADISH LEAVES CS-134 < 24.7 17-May-21 HORSERADISH LEAVES CS-137 < 21.3 15-Jun-21 HORSERADISH LEAVES BE-7 965.2 +/- 215.8 15-Jun-21 HORSERADISH LEAVES K-40 5,568.1 +/- 475.6 15-Jun-21 HORSERADISH LEAVES MN-54 < 12.5 15-Jun-21 HORSERADISH LEAVES CO-58 < 9.2 15-Jun-21 HORSERADISH LEAVES FE-59 < 30.5 15-Jun-21 HORSERADISH LEAVES CO-60 < 9.0 15-Jun-21 HORSERADISH LEAVES ZN-65 < 30.5 15-Jun-21 HORSERADISH LEAVES ZR-NB-95 < 18.1 15-Jun-21 HORSERADISH LEAVES I-131 < 40.5 15-Jun-21 HORSERADISH LEAVES CS-134 < 16.6 15-Jun-21 HORSERADISH LEAVES CS-137 < 19.9 15-Jul-21 HORSERADISH LEAVES BE-7 524.3 +/- 153.4 15-Jul-21 HORSERADISH LEAVES K-40 5,271.3 +/- 386.9 15-Jul-21 HORSERADISH LEAVES MN-54 < 12.5 15-Jul-21 HORSERADISH LEAVES CO-58 < 13.3 15-Jul-21 HORSERADISH LEAVES FE-59 < 20.9 2021 Annual Radiological Environmental Operating Report Page C - 60 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 15-Jul-21 HORSERADISH LEAVES CO-60 < 10.9 15-Jul-21 HORSERADISH LEAVES ZN-65 < 24.2 15-Jul-21 HORSERADISH LEAVES ZR-NB-95 < 16.4 15-Jul-21 HORSERADISH LEAVES I-131 < 44.0 15-Jul-21 HORSERADISH LEAVES CS-134 < 12.1 15-Jul-21 HORSERADISH LEAVES CS-137 < 13.3 17-Aug-21 HORSERADISH LEAVES BE-7 1,590.8 +/- 195.6 17-Aug-21 HORSERADISH LEAVES K-40 7,784.0 +/- 511.5 17-Aug-21 HORSERADISH LEAVES MN-54 < 13.9 17-Aug-21 HORSERADISH LEAVES CO-58 < 15.3 17-Aug-21 HORSERADISH LEAVES FE-59 < 25.1 17-Aug-21 HORSERADISH LEAVES CO-60 < 18.0 17-Aug-21 HORSERADISH LEAVES ZN-65 < 25.1 17-Aug-21 HORSERADISH LEAVES ZR-NB-95 < 19.4 17-Aug-21 HORSERADISH LEAVES I-131 < 17.4 17-Aug-21 HORSERADISH LEAVES CS-134 < 15.7 17-Aug-21 HORSERADISH LEAVES CS-137 < 14.1 21-Sep-21 HORSERADISH LEAVES BE-7 464.3 +/- 233.6 21-Sep-21 HORSERADISH LEAVES K-40 8,312.2 +/- 727.4 21-Sep-21 HORSERADISH LEAVES MN-54 < 15.4 21-Sep-21 HORSERADISH LEAVES CO-58 < 24.0 21-Sep-21 HORSERADISH LEAVES FE-59 < 28.3 21-Sep-21 HORSERADISH LEAVES CO-60 < 21.5 21-Sep-21 HORSERADISH LEAVES ZN-65 < 36.3 21-Sep-21 HORSERADISH LEAVES ZR-NB-95 < 19.1 21-Sep-21 HORSERADISH LEAVES I-131 < 53.0 21-Sep-21 HORSERADISH LEAVES CS-134 < 27.6 21-Sep-21 HORSERADISH LEAVES CS-137 < 14.6 14-Oct-21 HORSERADISH LEAVES BE-7 1,254.7 +/- 205.6 14-Oct-21 HORSERADISH LEAVES BE-7 1,157.4 +/- 201.5 Duplicate 14-Oct-21 HORSERADISH LEAVES K-40 6,027.8 +/- 514.9 Duplicate 14-Oct-21 HORSERADISH LEAVES K-40 5,929.7 +/- 516.0 14-Oct-21 HORSERADISH LEAVES MN-54 < 21.4 14-Oct-21 HORSERADISH LEAVES MN-54 < 19.3 Duplicate 14-Oct-21 HORSERADISH LEAVES CO-58 < 18.1 14-Oct-21 HORSERADISH LEAVES CO-58 < 11.7 Duplicate 14-Oct-21 HORSERADISH LEAVES FE-59 < 40.5 14-Oct-21 HORSERADISH LEAVES FE-59 < 45.4 Duplicate 2021 Annual Radiological Environmental Operating Report Page C - 61 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-Oct-21 HORSERADISH LEAVES CO-60 < 13.3 14-Oct-21 HORSERADISH LEAVES CO-60 < 13.7 Duplicate 14-Oct-21 HORSERADISH LEAVES ZN-65 < 38.4 Duplicate 14-Oct-21 HORSERADISH LEAVES ZN-65 < 35.6 14-Oct-21 HORSERADISH LEAVES ZR-NB-95 < 14.9 14-Oct-21 HORSERADISH LEAVES ZR-NB-95 < 13.6 Duplicate 14-Oct-21 HORSERADISH LEAVES I-131 < 36.1 14-Oct-21 HORSERADISH LEAVES I-131 < 26.6 Duplicate 14-Oct-21 HORSERADISH LEAVES CS-134 < 15.7 14-Oct-21 HORSERADISH LEAVES CS-134 < 18.8 Duplicate 14-Oct-21 HORSERADISH LEAVES CS-137 < 18.5 Duplicate 14-Oct-21 HORSERADISH LEAVES CS-137 < 14.9 2021 Annual Radiological Environmental Operating Report Page C - 62 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Apr-21 HORSERADISH LEAVES BE-7 759.1 +/- 225.4 19-Apr-21 HORSERADISH LEAVES K-40 5,186.9 +/- 568.4 19-Apr-21 HORSERADISH LEAVES MN-54 < 18.6 19-Apr-21 HORSERADISH LEAVES CO-58 < 17.4 19-Apr-21 HORSERADISH LEAVES FE-59 < 49.6 19-Apr-21 HORSERADISH LEAVES CO-60 < 21.9 19-Apr-21 HORSERADISH LEAVES ZN-65 < 35.7 19-Apr-21 HORSERADISH LEAVES ZR-NB-95 < 17.7 19-Apr-21 HORSERADISH LEAVES I-131 < 28.9 19-Apr-21 HORSERADISH LEAVES CS-134 < 23.4 19-Apr-21 HORSERADISH LEAVES CS-137 < 21.7 17-May-21 HORSERADISH LEAVES BE-7 897.3 +/- 118.0 17-May-21 HORSERADISH LEAVES K-40 3,964.5 +/- 188.0 17-May-21 HORSERADISH LEAVES MN-54 < 9.1 17-May-21 HORSERADISH LEAVES CO-58 < 11.0 17-May-21 HORSERADISH LEAVES FE-59 < 20.5 17-May-21 HORSERADISH LEAVES CO-60 < 6.0 17-May-21 HORSERADISH LEAVES ZN-65 < 16.8 17-May-21 HORSERADISH LEAVES ZR-NB-95 < 19.0 17-May-21 HORSERADISH LEAVES I-131 < 30.2 17-May-21 HORSERADISH LEAVES CS-134 < 7.9 17-May-21 HORSERADISH LEAVES CS-137 < 8.8 15-Jun-21 HORSERADISH LEAVES BE-7 876.5 +/- 266.4 15-Jun-21 HORSERADISH LEAVES K-40 5,694.9 +/- 594.9 15-Jun-21 HORSERADISH LEAVES MN-54 < 20.3 15-Jun-21 HORSERADISH LEAVES CO-58 < 13.0 15-Jun-21 HORSERADISH LEAVES FE-59 < 36.1 15-Jun-21 HORSERADISH LEAVES CO-60 < 23.2 15-Jun-21 HORSERADISH LEAVES ZN-65 < 43.6 15-Jun-21 HORSERADISH LEAVES ZR-NB-95 < 19.0 15-Jun-21 HORSERADISH LEAVES I-131 < 49.3 15-Jun-21 HORSERADISH LEAVES CS-134 < 27.4 15-Jun-21 HORSERADISH LEAVES CS-137 < 17.2 15-Jul-21 HORSERADISH LEAVES BE-7 1,206.0 +/- 143.7 15-Jul-21 HORSERADISH LEAVES K-40 6,310.8 +/- 241.2 15-Jul-21 HORSERADISH LEAVES MN-54 < 9.5 15-Jul-21 HORSERADISH LEAVES CO-58 < 9.0 15-Jul-21 HORSERADISH LEAVES FE-59 < 24.4 2021 Annual Radiological Environmental Operating Report Page C - 63 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 15-Jul-21 HORSERADISH LEAVES CO-60 < 7.3 15-Jul-21 HORSERADISH LEAVES ZN-65 < 16.2 15-Jul-21 HORSERADISH LEAVES ZR-NB-95 < 13.4 15-Jul-21 HORSERADISH LEAVES I-131 < 39.2 15-Jul-21 HORSERADISH LEAVES CS-134 < 9.4 15-Jul-21 HORSERADISH LEAVES CS-137 < 7.8 17-Aug-21 HORSERADISH LEAVES BE-7 775.9 +/- 231.5 17-Aug-21 HORSERADISH LEAVES K-40 4,934.4 +/- 454.7 17-Aug-21 HORSERADISH LEAVES MN-54 < 14.0 17-Aug-21 HORSERADISH LEAVES CO-58 < 16.7 17-Aug-21 HORSERADISH LEAVES FE-59 < 25.7 17-Aug-21 HORSERADISH LEAVES CO-60 < 13.1 17-Aug-21 HORSERADISH LEAVES ZN-65 < 24.1 17-Aug-21 HORSERADISH LEAVES ZR-NB-95 < 14.8 17-Aug-21 HORSERADISH LEAVES I-131 < 23.9 17-Aug-21 HORSERADISH LEAVES CS-134 < 18.0 17-Aug-21 HORSERADISH LEAVES CS-137 < 17.1 21-Sep-21 HORSERADISH LEAVES BE-7 < 244.7 21-Sep-21 HORSERADISH LEAVES K-40 5,293.1 +/- 576.2 21-Sep-21 HORSERADISH LEAVES MN-54 < 17.8 21-Sep-21 HORSERADISH LEAVES CO-58 < 19.1 21-Sep-21 HORSERADISH LEAVES FE-59 < 28.0 21-Sep-21 HORSERADISH LEAVES CO-60 < 18.1 21-Sep-21 HORSERADISH LEAVES ZN-65 < 34.7 21-Sep-21 HORSERADISH LEAVES ZR-NB-95 < 16.4 21-Sep-21 HORSERADISH LEAVES I-131 < 48.5 21-Sep-21 HORSERADISH LEAVES CS-134 < 24.0 21-Sep-21 HORSERADISH LEAVES CS-137 < 23.5 14-Oct-21 HORSERADISH LEAVES BE-7 1,249.3 +/- 199.4 14-Oct-21 HORSERADISH LEAVES K-40 5,339.3 +/- 544.5 14-Oct-21 HORSERADISH LEAVES MN-54 < 20.7 14-Oct-21 HORSERADISH LEAVES CO-58 < 20.0 14-Oct-21 HORSERADISH LEAVES FE-59 < 36.0 14-Oct-21 HORSERADISH LEAVES CO-60 < 15.0 14-Oct-21 HORSERADISH LEAVES ZN-65 < 39.1 14-Oct-21 HORSERADISH LEAVES ZR-NB-95 < 20.2 14-Oct-21 HORSERADISH LEAVES I-131 < 23.6 14-Oct-21 HORSERADISH LEAVES CS-134 < 20.4 2021 Annual Radiological Environmental Operating Report Page C - 64 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-Oct-21 HORSERADISH LEAVES CS-137 < 15.4 2021 Annual Radiological Environmental Operating Report Page C - 65 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Apr-21 HORSERADISH LEAVES BE-7 526.6 +/- 214.6 19-Apr-21 HORSERADISH LEAVES K-40 4,785.3 +/- 555.4 19-Apr-21 HORSERADISH LEAVES MN-54 < 18.7 19-Apr-21 HORSERADISH LEAVES CO-58 < 13.7 19-Apr-21 HORSERADISH LEAVES FE-59 < 22.9 19-Apr-21 HORSERADISH LEAVES CO-60 < 14.9 19-Apr-21 HORSERADISH LEAVES ZN-65 < 31.0 19-Apr-21 HORSERADISH LEAVES ZR-NB-95 < 16.3 19-Apr-21 HORSERADISH LEAVES I-131 < 25.8 19-Apr-21 HORSERADISH LEAVES CS-134 < 20.7 19-Apr-21 HORSERADISH LEAVES CS-137 < 16.5 17-May-21 HORSERADISH LEAVES BE-7 1,066.3 +/- 203.8 17-May-21 HORSERADISH LEAVES K-40 3,439.7 +/- 400.8 17-May-21 HORSERADISH LEAVES MN-54 < 16.7 17-May-21 HORSERADISH LEAVES CO-58 < 15.0 17-May-21 HORSERADISH LEAVES FE-59 < 32.4 17-May-21 HORSERADISH LEAVES CO-60 < 14.2 17-May-21 HORSERADISH LEAVES ZN-65 < 36.8 17-May-21 HORSERADISH LEAVES ZR-NB-95 < 19.6 17-May-21 HORSERADISH LEAVES I-131 < 14.9 17-May-21 HORSERADISH LEAVES CS-134 < 18.2 17-May-21 HORSERADISH LEAVES CS-137 < 16.7 15-Jun-21 HORSERADISH LEAVES BE-7 1,045.3 +/- 136.8 15-Jun-21 HORSERADISH LEAVES K-40 5,765.0 +/- 387.9 15-Jun-21 HORSERADISH LEAVES MN-54 < 11.9 15-Jun-21 HORSERADISH LEAVES CO-58 < 10.9 15-Jun-21 HORSERADISH LEAVES FE-59 < 25.7 15-Jun-21 HORSERADISH LEAVES CO-60 < 11.2 15-Jun-21 HORSERADISH LEAVES ZN-65 < 33.8 15-Jun-21 HORSERADISH LEAVES ZR-NB-95 < 10.1 15-Jun-21 HORSERADISH LEAVES I-131 < 18.0 15-Jun-21 HORSERADISH LEAVES CS-134 < 13.3 15-Jun-21 HORSERADISH LEAVES CS-137 < 13.4 15-Jul-21 HORSERADISH LEAVES BE-7 1,624.9 +/- 139.3 15-Jul-21 HORSERADISH LEAVES K-40 6,605.4 +/- 292.5 15-Jul-21 HORSERADISH LEAVES MN-54 < 10.2 15-Jul-21 HORSERADISH LEAVES CO-58 < 6.8 15-Jul-21 HORSERADISH LEAVES FE-59 < 20.9 2021 Annual Radiological Environmental Operating Report Page C - 66 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 15-Jul-21 HORSERADISH LEAVES CO-60 < 6.2 15-Jul-21 HORSERADISH LEAVES ZN-65 < 20.2 15-Jul-21 HORSERADISH LEAVES ZR-NB-95 < 12.5 15-Jul-21 HORSERADISH LEAVES I-131 < 45.1 15-Jul-21 HORSERADISH LEAVES CS-134 < 10.5 15-Jul-21 HORSERADISH LEAVES CS-137 < 10.5 17-Aug-21 HORSERADISH LEAVES BE-7 1,097.1 +/- 221.6 17-Aug-21 HORSERADISH LEAVES K-40 7,761.0 +/- 541.6 17-Aug-21 HORSERADISH LEAVES MN-54 < 9.2 17-Aug-21 HORSERADISH LEAVES CO-58 < 15.7 17-Aug-21 HORSERADISH LEAVES FE-59 < 34.8 17-Aug-21 HORSERADISH LEAVES CO-60 < 16.5 17-Aug-21 HORSERADISH LEAVES ZN-65 < 20.6 17-Aug-21 HORSERADISH LEAVES ZR-NB-95 < 15.4 17-Aug-21 HORSERADISH LEAVES I-131 < 21.0 17-Aug-21 HORSERADISH LEAVES CS-134 < 20.1 17-Aug-21 HORSERADISH LEAVES CS-137 < 9.4 21-Sep-21 HORSERADISH LEAVES BE-7 410.6 +/- 192.8 21-Sep-21 HORSERADISH LEAVES K-40 7,766.6 +/- 574.8 21-Sep-21 HORSERADISH LEAVES MN-54 < 10.8 21-Sep-21 HORSERADISH LEAVES CO-58 < 17.7 21-Sep-21 HORSERADISH LEAVES FE-59 < 35.5 21-Sep-21 HORSERADISH LEAVES CO-60 < 15.4 21-Sep-21 HORSERADISH LEAVES ZN-65 < 30.3 21-Sep-21 HORSERADISH LEAVES ZR-NB-95 < 15.9 21-Sep-21 HORSERADISH LEAVES I-131 < 26.0 21-Sep-21 HORSERADISH LEAVES CS-134 < 16.9 21-Sep-21 HORSERADISH LEAVES CS-137 < 20.2 14-Oct-21 HORSERADISH LEAVES BE-7 1,480.1 +/- 223.5 14-Oct-21 HORSERADISH LEAVES K-40 6,996.3 +/- 578.3 14-Oct-21 HORSERADISH LEAVES MN-54 < 12.7 14-Oct-21 HORSERADISH LEAVES CO-58 < 12.7 14-Oct-21 HORSERADISH LEAVES FE-59 < 31.5 14-Oct-21 HORSERADISH LEAVES CO-60 < 14.8 14-Oct-21 HORSERADISH LEAVES ZN-65 < 36.6 14-Oct-21 HORSERADISH LEAVES ZR-NB-95 < 16.8 14-Oct-21 HORSERADISH LEAVES I-131 < 18.9 14-Oct-21 HORSERADISH LEAVES CS-134 < 17.6 2021 Annual Radiological Environmental Operating Report Page C - 67 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-Oct-21 HORSERADISH LEAVES CS-137 < 12.4 2021 Annual Radiological Environmental Operating Report Page C - 68 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Apr-21 HORSERADISH LEAVES BE-7 918.5 +/- 317.0 19-Apr-21 HORSERADISH LEAVES K-40 5,347.3 +/- 628.7 19-Apr-21 HORSERADISH LEAVES MN-54 < 13.1 19-Apr-21 HORSERADISH LEAVES CO-58 < 10.8 19-Apr-21 HORSERADISH LEAVES FE-59 < 35.0 19-Apr-21 HORSERADISH LEAVES CO-60 < 17.9 19-Apr-21 HORSERADISH LEAVES ZN-65 < 51.5 19-Apr-21 HORSERADISH LEAVES ZR-NB-95 < 20.1 19-Apr-21 HORSERADISH LEAVES I-131 < 32.0 19-Apr-21 HORSERADISH LEAVES CS-134 < 26.9 19-Apr-21 HORSERADISH LEAVES CS-137 < 27.4 17-May-21 HORSERADISH LEAVES BE-7 1,683.7 +/- 384.2 17-May-21 HORSERADISH LEAVES K-40 3,233.5 +/- 452.7 17-May-21 HORSERADISH LEAVES MN-54 < 10.0 17-May-21 HORSERADISH LEAVES CO-58 < 19.3 17-May-21 HORSERADISH LEAVES FE-59 < 23.5 17-May-21 HORSERADISH LEAVES CO-60 < 19.9 17-May-21 HORSERADISH LEAVES ZN-65 < 41.4 17-May-21 HORSERADISH LEAVES ZR-NB-95 < 14.6 17-May-21 HORSERADISH LEAVES I-131 < 26.8 17-May-21 HORSERADISH LEAVES CS-134 < 23.0 17-May-21 HORSERADISH LEAVES CS-137 < 22.6 15-Jun-21 HORSERADISH LEAVES BE-7 1,144.1 +/- 218.1 15-Jun-21 HORSERADISH LEAVES K-40 6,308.7 +/- 550.5 15-Jun-21 HORSERADISH LEAVES MN-54 < 18.6 15-Jun-21 HORSERADISH LEAVES CO-58 < 20.2 15-Jun-21 HORSERADISH LEAVES FE-59 < 45.8 15-Jun-21 HORSERADISH LEAVES CO-60 < 21.6 15-Jun-21 HORSERADISH LEAVES ZN-65 < 53.4 15-Jun-21 HORSERADISH LEAVES ZR-NB-95 < 22.3 15-Jun-21 HORSERADISH LEAVES I-131 < 24.5 15-Jun-21 HORSERADISH LEAVES CS-134 < 19.4 15-Jun-21 HORSERADISH LEAVES CS-137 < 15.9 15-Jul-21 HORSERADISH LEAVES BE-7 972.1 +/- 207.2 15-Jul-21 HORSERADISH LEAVES K-40 6,136.0 +/- 434.2 15-Jul-21 HORSERADISH LEAVES MN-54 < 6.6 15-Jul-21 HORSERADISH LEAVES CO-58 < 11.4 15-Jul-21 HORSERADISH LEAVES FE-59 < 45.5 2021 Annual Radiological Environmental Operating Report Page C - 69 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 15-Jul-21 HORSERADISH LEAVES CO-60 < 8.4 15-Jul-21 HORSERADISH LEAVES ZN-65 < 15.7 15-Jul-21 HORSERADISH LEAVES ZR-NB-95 < 14.1 15-Jul-21 HORSERADISH LEAVES I-131 < 48.6 15-Jul-21 HORSERADISH LEAVES CS-134 < 15.6 15-Jul-21 HORSERADISH LEAVES CS-137 < 12.6 17-Aug-21 HORSERADISH LEAVES BE-7 558.6 +/- 196.4 17-Aug-21 HORSERADISH LEAVES K-40 6,235.2 +/- 573.1 17-Aug-21 HORSERADISH LEAVES MN-54 < 20.1 17-Aug-21 HORSERADISH LEAVES CO-58 < 19.8 17-Aug-21 HORSERADISH LEAVES FE-59 < 39.8 17-Aug-21 HORSERADISH LEAVES CO-60 < 16.4 17-Aug-21 HORSERADISH LEAVES ZN-65 < 40.6 17-Aug-21 HORSERADISH LEAVES ZR-NB-95 < 21.0 17-Aug-21 HORSERADISH LEAVES I-131 < 30.2 17-Aug-21 HORSERADISH LEAVES CS-134 < 21.8 17-Aug-21 HORSERADISH LEAVES CS-137 < 21.1 21-Sep-21 HORSERADISH LEAVES BE-7 444.9 +/- 206.7 21-Sep-21 HORSERADISH LEAVES K-40 6,101.3 +/- 644.8 21-Sep-21 HORSERADISH LEAVES MN-54 < 21.8 21-Sep-21 HORSERADISH LEAVES CO-58 < 12.1 21-Sep-21 HORSERADISH LEAVES FE-59 < 46.8 21-Sep-21 HORSERADISH LEAVES CO-60 < 24.6 21-Sep-21 HORSERADISH LEAVES ZN-65 < 25.7 21-Sep-21 HORSERADISH LEAVES ZR-NB-95 < 14.5 21-Sep-21 HORSERADISH LEAVES I-131 < 29.2 21-Sep-21 HORSERADISH LEAVES CS-134 < 21.7 21-Sep-21 HORSERADISH LEAVES CS-137 < 14.6 14-Oct-21 HORSERADISH LEAVES BE-7 1,057.3 +/- 261.5 14-Oct-21 HORSERADISH LEAVES K-40 6,142.5 +/- 606.1 14-Oct-21 HORSERADISH LEAVES MN-54 < 15.5 14-Oct-21 HORSERADISH LEAVES CO-58 < 19.4 14-Oct-21 HORSERADISH LEAVES FE-59 < 44.4 14-Oct-21 HORSERADISH LEAVES CO-60 < 16.5 14-Oct-21 HORSERADISH LEAVES ZN-65 < 49.0 14-Oct-21 HORSERADISH LEAVES ZR-NB-95 < 20.6 14-Oct-21 HORSERADISH LEAVES I-131 < 39.2 14-Oct-21 HORSERADISH LEAVES CS-134 < 25.9 2021 Annual Radiological Environmental Operating Report Page C - 70 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-Oct-21 HORSERADISH LEAVES CS-137 < 22.6 2021 Annual Radiological Environmental Operating Report Page C - 71 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 17-May-21 HORSERADISH LEAVES BE-7 1,590.9 +/- 338.5 17-May-21 HORSERADISH LEAVES K-40 5,270.7 +/- 602.9 17-May-21 HORSERADISH LEAVES MN-54 < 18.8 17-May-21 HORSERADISH LEAVES CO-58 < 15.8 17-May-21 HORSERADISH LEAVES FE-59 < 29.1 17-May-21 HORSERADISH LEAVES CO-60 < 15.4 17-May-21 HORSERADISH LEAVES ZN-65 < 27.4 17-May-21 HORSERADISH LEAVES ZR-NB-95 < 21.2 17-May-21 HORSERADISH LEAVES I-131 < 27.7 17-May-21 HORSERADISH LEAVES CS-134 < 24.6 17-May-21 HORSERADISH LEAVES CS-137 < 18.1 15-Jun-21 HORSERADISH LEAVES BE-7 1,033.1 +/- 288.6 15-Jun-21 HORSERADISH LEAVES K-40 5,762.8 +/- 656.8 15-Jun-21 HORSERADISH LEAVES MN-54 < 19.5 15-Jun-21 HORSERADISH LEAVES CO-58 < 23.5 15-Jun-21 HORSERADISH LEAVES FE-59 < 31.8 15-Jun-21 HORSERADISH LEAVES CO-60 < 25.7 15-Jun-21 HORSERADISH LEAVES ZN-65 < 61.9 15-Jun-21 HORSERADISH LEAVES ZR-NB-95 < 29.1 15-Jun-21 HORSERADISH LEAVES I-131 < 40.2 15-Jun-21 HORSERADISH LEAVES CS-134 < 22.8 15-Jun-21 HORSERADISH LEAVES CS-137 < 23.4 15-Jul-21 HORSERADISH LEAVES BE-7 665.6 +/- 110.8 15-Jul-21 HORSERADISH LEAVES K-40 6,428.8 +/- 260.5 15-Jul-21 HORSERADISH LEAVES MN-54 < 10.3 15-Jul-21 HORSERADISH LEAVES CO-58 < 10.4 15-Jul-21 HORSERADISH LEAVES FE-59 < 19.0 15-Jul-21 HORSERADISH LEAVES CO-60 < 7.6 15-Jul-21 HORSERADISH LEAVES ZN-65 < 24.1 15-Jul-21 HORSERADISH LEAVES ZR-NB-95 < 12.8 15-Jul-21 HORSERADISH LEAVES I-131 < 22.1 15-Jul-21 HORSERADISH LEAVES CS-134 < 9.4 15-Jul-21 HORSERADISH LEAVES CS-137 < 10.4 21-Sep-21 HORSERADISH LEAVES BE-7 433.9 +/- 180.8 Duplicate 21-Sep-21 HORSERADISH LEAVES BE-7 < 281.0 21-Sep-21 HORSERADISH LEAVES K-40 6,045.1 +/- 566.5 Duplicate 21-Sep-21 HORSERADISH LEAVES K-40 6,676.4 +/- 613.9 21-Sep-21 HORSERADISH LEAVES MN-54 < 15.5 Duplicate 2021 Annual Radiological Environmental Operating Report Page C - 72 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 21-Sep-21 HORSERADISH LEAVES MN-54 < 18.9 21-Sep-21 HORSERADISH LEAVES CO-58 < 21.1 Duplicate 21-Sep-21 HORSERADISH LEAVES CO-58 < 21.2 21-Sep-21 HORSERADISH LEAVES FE-59 < 26.7 Duplicate 21-Sep-21 HORSERADISH LEAVES FE-59 < 35.2 21-Sep-21 HORSERADISH LEAVES CO-60 < 24.0 21-Sep-21 HORSERADISH LEAVES CO-60 < 18.3 Duplicate 21-Sep-21 HORSERADISH LEAVES ZN-65 < 45.3 21-Sep-21 HORSERADISH LEAVES ZN-65 < 21.6 Duplicate 21-Sep-21 HORSERADISH LEAVES ZR-NB-95 < 20.6 21-Sep-21 HORSERADISH LEAVES ZR-NB-95 < 15.4 Duplicate 21-Sep-21 HORSERADISH LEAVES I-131 < 28.1 Duplicate 21-Sep-21 HORSERADISH LEAVES I-131 < 48.3 21-Sep-21 HORSERADISH LEAVES CS-134 < 25.8 21-Sep-21 HORSERADISH LEAVES CS-134 < 19.0 Duplicate 21-Sep-21 HORSERADISH LEAVES CS-137 < 17.5 Duplicate 21-Sep-21 HORSERADISH LEAVES CS-137 < 22.0 14-Oct-21 HORSERADISH LEAVES BE-7 1,361.8 +/- 239.3 14-Oct-21 HORSERADISH LEAVES K-40 6,145.6 +/- 537.1 14-Oct-21 HORSERADISH LEAVES MN-54 < 14.3 14-Oct-21 HORSERADISH LEAVES CO-58 < 18.9 14-Oct-21 HORSERADISH LEAVES FE-59 < 34.5 14-Oct-21 HORSERADISH LEAVES CO-60 < 15.4 14-Oct-21 HORSERADISH LEAVES ZN-65 < 42.5 14-Oct-21 HORSERADISH LEAVES ZR-NB-95 < 10.6 14-Oct-21 HORSERADISH LEAVES I-131 < 27.8 14-Oct-21 HORSERADISH LEAVES CS-134 < 20.0 14-Oct-21 HORSERADISH LEAVES CS-137 < 14.9 2021 Annual Radiological Environmental Operating Report Page C - 73 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Crops Location: NR-D1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 06-Oct-21 IRRIGATED CORN BE-7 < 99.4 06-Oct-21 IRRIGATED CORN K-40 2,794.5 +/- 251.0 06-Oct-21 IRRIGATED CORN MN-54 < 5.5 06-Oct-21 IRRIGATED CORN CO-58 < 7.5 06-Oct-21 IRRIGATED CORN FE-59 < 19.3 06-Oct-21 IRRIGATED CORN CO-60 < 8.8 06-Oct-21 IRRIGATED CORN ZN-65 < 21.6 06-Oct-21 IRRIGATED CORN ZR-NB-95 < 9.9 06-Oct-21 IRRIGATED CORN I-131 < 34.1 06-Oct-21 IRRIGATED CORN CS-134 < 9.2 06-Oct-21 IRRIGATED CORN CS-137 < 10.0 2021 Annual Radiological Environmental Operating Report Page C - 74 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Crops Location: NR-D2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 26-Nov-21 CATTLE FEED BE-7 < 58.2 26-Nov-21 CATTLE FEED K-40 15,837.0 +/- 595.7 26-Nov-21 CATTLE FEED MN-54 < 15.5 26-Nov-21 CATTLE FEED CO-58 < 10.0 26-Nov-21 CATTLE FEED FE-59 < 28.7 26-Nov-21 CATTLE FEED CO-60 < 16.3 26-Nov-21 CATTLE FEED ZN-65 < 38.9 26-Nov-21 CATTLE FEED ZR-NB-95 < 8.6 26-Nov-21 CATTLE FEED I-131 < 16.6 26-Nov-21 CATTLE FEED CS-134 < 12.2 26-Nov-21 CATTLE FEED CS-137 < 16.0 2021 Annual Radiological Environmental Operating Report Page C - 75 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Food/Crops Location: NR-U1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 30-Sep-21 NON-IRRIGATED CORN BE-7 < 57.7 30-Sep-21 NON-IRRIGATED CORN K-40 3,401.8 +/- 189.4 30-Sep-21 NON-IRRIGATED CORN MN-54 < 5.6 30-Sep-21 NON-IRRIGATED CORN CO-58 < 5.8 30-Sep-21 NON-IRRIGATED CORN FE-59 < 12.5 30-Sep-21 NON-IRRIGATED CORN CO-60 < 3.2 30-Sep-21 NON-IRRIGATED CORN ZN-65 < 10.7 30-Sep-21 NON-IRRIGATED CORN ZR-NB-95 < 6.9 30-Sep-21 NON-IRRIGATED CORN I-131 < 10.8 30-Sep-21 NON-IRRIGATED CORN CS-134 < 6.2 30-Sep-21 NON-IRRIGATED CORN CS-137 < 6.4 2021 Annual Radiological Environmental Operating Report Page C - 76 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Aquatic Bottom Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 05-May-21 BOTTOM SEDIMENT K-40 12,574.0 +/- 402.7 05-May-21 BOTTOM SEDIMENT MN-54 < 19.2 05-May-21 BOTTOM SEDIMENT CO-58 < 17.0 05-May-21 BOTTOM SEDIMENT FE-59 < 30.0 05-May-21 BOTTOM SEDIMENT CO-60 < 18.5 05-May-21 BOTTOM SEDIMENT ZN-65 < 36.1 05-May-21 BOTTOM SEDIMENT CS-134 < 15.6 05-May-21 BOTTOM SEDIMENT CS-137 49.7 +/- 18.0 05-May-21 BOTTOM SEDIMENT FE-55 < 14,755.7 09-Nov-21 BOTTOM SEDIMENT K-40 14,368.0 +/- 1,359.0 09-Nov-21 BOTTOM SEDIMENT MN-54 < 57.9 09-Nov-21 BOTTOM SEDIMENT CO-58 < 59.6 09-Nov-21 BOTTOM SEDIMENT FE-59 < 114.4 09-Nov-21 BOTTOM SEDIMENT CO-60 < 50.1 09-Nov-21 BOTTOM SEDIMENT ZN-65 < 109.1 09-Nov-21 BOTTOM SEDIMENT CS-134 < 40.2 09-Nov-21 BOTTOM SEDIMENT CS-137 < 60.1 09-Nov-21 BOTTOM SEDIMENT FE-55 < 5,829.0 2021 Annual Radiological Environmental Operating Report Page C - 77 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Aquatic Bottom Sediment Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 25-May-21 BOTTOM SEDIMENT K-40 12,581.0 +/- 790.5 25-May-21 BOTTOM SEDIMENT MN-54 < 34.0 25-May-21 BOTTOM SEDIMENT CO-58 < 39.2 25-May-21 BOTTOM SEDIMENT FE-59 < 137.9 25-May-21 BOTTOM SEDIMENT CO-60 < 25.5 25-May-21 BOTTOM SEDIMENT ZN-65 < 82.5 25-May-21 BOTTOM SEDIMENT CS-134 < 26.6 25-May-21 BOTTOM SEDIMENT CS-137 < 33.7 2021 Annual Radiological Environmental Operating Report Page C - 78 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Aquatic Bottom Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 05-May-21 BOTTOM SEDIMENT K-40 14,253.0 +/- 449.1 05-May-21 BOTTOM SEDIMENT MN-54 < 18.6 05-May-21 BOTTOM SEDIMENT CO-58 < 20.6 05-May-21 BOTTOM SEDIMENT FE-59 < 37.8 05-May-21 BOTTOM SEDIMENT CO-60 < 18.9 05-May-21 BOTTOM SEDIMENT ZN-65 < 38.8 05-May-21 BOTTOM SEDIMENT CS-134 < 17.8 05-May-21 BOTTOM SEDIMENT CS-137 69.6 +/- 22.4 01-Dec-21 BOTTOM SEDIMENT K-40 18,725.0 +/- 1,975.0 01-Dec-21 BOTTOM SEDIMENT MN-54 < 85.0 01-Dec-21 BOTTOM SEDIMENT CO-58 < 78.3 01-Dec-21 BOTTOM SEDIMENT FE-59 < 244.7 01-Dec-21 BOTTOM SEDIMENT CO-60 < 52.9 01-Dec-21 BOTTOM SEDIMENT ZN-65 < 194.2 01-Dec-21 BOTTOM SEDIMENT CS-134 < 58.9 01-Dec-21 BOTTOM SEDIMENT CS-137 166.7 +/- 93.7 2021 Annual Radiological Environmental Operating Report Page C - 79 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Aquatic Bottom Sediment Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 05-Feb-21 BOTTOM SEDIMENT K-40 10,306.0 +/- 639.0 05-Feb-21 BOTTOM SEDIMENT MN-54 < 26.9 05-Feb-21 BOTTOM SEDIMENT CO-58 < 41.1 05-Feb-21 BOTTOM SEDIMENT FE-59 < 89.8 05-Feb-21 BOTTOM SEDIMENT CO-60 < 26.7 05-Feb-21 BOTTOM SEDIMENT ZN-65 < 77.4 05-Feb-21 BOTTOM SEDIMENT CS-134 < 24.9 05-Feb-21 BOTTOM SEDIMENT CS-137 < 25.5 02-Dec-21 BOTTOM SEDIMENT K-40 12,660.0 +/- 920.7 02-Dec-21 BOTTOM SEDIMENT MN-54 < 50.6 02-Dec-21 BOTTOM SEDIMENT CO-58 < 41.3 02-Dec-21 BOTTOM SEDIMENT FE-59 < 131.2 02-Dec-21 BOTTOM SEDIMENT CO-60 < 41.4 02-Dec-21 BOTTOM SEDIMENT ZN-65 < 125.9 02-Dec-21 BOTTOM SEDIMENT CS-134 < 35.1 02-Dec-21 BOTTOM SEDIMENT CS-137 < 47.3 2021 Annual Radiological Environmental Operating Report Page C - 80 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Aquatic Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 19-Oct-21 AMERICAN PONDWEED BE-7 351.4 +/- 108.8 19-Oct-21 AMERICAN PONDWEED BE-7 377.8 +/- 71.5 Duplicate 19-Oct-21 AMERICAN PONDWEED K-40 2,206.6 +/- 141.6 19-Oct-21 AMERICAN PONDWEED K-40 2,416.2 +/- 84.5 Duplicate 19-Oct-21 AMERICAN PONDWEED MN-54 < 4.3 Duplicate 19-Oct-21 AMERICAN PONDWEED MN-54 < 8.8 19-Oct-21 AMERICAN PONDWEED CO-58 < 5.4 Duplicate 19-Oct-21 AMERICAN PONDWEED CO-58 < 6.7 19-Oct-21 AMERICAN PONDWEED FE-59 < 24.0 19-Oct-21 AMERICAN PONDWEED FE-59 < 14.5 Duplicate 19-Oct-21 AMERICAN PONDWEED CO-60 < 6.1 19-Oct-21 AMERICAN PONDWEED CO-60 < 4.3 Duplicate 19-Oct-21 AMERICAN PONDWEED ZN-65 < 15.4 19-Oct-21 AMERICAN PONDWEED ZN-65 < 8.2 Duplicate 19-Oct-21 AMERICAN PONDWEED ZR-NB-95 < 15.0 19-Oct-21 AMERICAN PONDWEED ZR-NB-95 < 11.9 Duplicate 19-Oct-21 AMERICAN PONDWEED I-131 < 396.0 19-Oct-21 AMERICAN PONDWEED I-131 < 298.5 Duplicate 19-Oct-21 AMERICAN PONDWEED CS-134 < 6.0 19-Oct-21 AMERICAN PONDWEED CS-134 < 3.7 Duplicate 19-Oct-21 AMERICAN PONDWEED CS-137 < 4.1 Duplicate 19-Oct-21 AMERICAN PONDWEED CS-137 < 7.5 2021 Annual Radiological Environmental Operating Report Page C - 81 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Terrestrial Vegetation Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 23-Jun-21 PASTURAGE BE-7 1,683.3 +/- 206.3 23-Jun-21 PASTURAGE K-40 8,717.0 +/- 535.7 23-Jun-21 PASTURAGE MN-54 < 13.4 23-Jun-21 PASTURAGE CO-58 < 12.8 23-Jun-21 PASTURAGE FE-59 < 18.5 23-Jun-21 PASTURAGE CO-60 < 10.1 23-Jun-21 PASTURAGE ZN-65 < 42.9 23-Jun-21 PASTURAGE ZR-NB-95 < 15.2 23-Jun-21 PASTURAGE I-131 < 32.4 23-Jun-21 PASTURAGE CS-134 < 15.8 23-Jun-21 PASTURAGE CS-137 < 17.9 2021 Annual Radiological Environmental Operating Report Page C - 82 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Terrestrial Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 23-Jun-21 PASTURAGE BE-7 954.8 +/- 263.5 23-Jun-21 PASTURAGE BE-7 975.5 +/- 333.6 Duplicate 23-Jun-21 PASTURAGE K-40 8,121.7 +/- 701.6 Duplicate 23-Jun-21 PASTURAGE K-40 8,057.4 +/- 556.0 23-Jun-21 PASTURAGE MN-54 < 19.7 23-Jun-21 PASTURAGE MN-54 < 24.9 Duplicate 23-Jun-21 PASTURAGE CO-58 < 28.5 Duplicate 23-Jun-21 PASTURAGE CO-58 < 20.2 23-Jun-21 PASTURAGE FE-59 < 51.9 Duplicate 23-Jun-21 PASTURAGE FE-59 < 21.6 23-Jun-21 PASTURAGE CO-60 < 19.5 Duplicate 23-Jun-21 PASTURAGE CO-60 < 14.1 23-Jun-21 PASTURAGE ZN-65 < 42.1 23-Jun-21 PASTURAGE ZN-65 < 34.7 Duplicate 23-Jun-21 PASTURAGE ZR-NB-95 < 21.4 23-Jun-21 PASTURAGE ZR-NB-95 < 27.4 Duplicate 23-Jun-21 PASTURAGE I-131 < 38.5 23-Jun-21 PASTURAGE I-131 < 43.6 Duplicate 23-Jun-21 PASTURAGE CS-134 < 30.1 Duplicate 23-Jun-21 PASTURAGE CS-134 < 21.0 23-Jun-21 PASTURAGE CS-137 < 34.5 Duplicate 23-Jun-21 PASTURAGE CS-137 < 21.2 2021 Annual Radiological Environmental Operating Report Page C - 83 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Terrestrial Soil Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 26-Apr-21 SOIL K-40 10,551.0 +/- 699.1 26-Apr-21 SOIL MN-54 < 30.8 26-Apr-21 SOIL CO-58 < 23.0 26-Apr-21 SOIL FE-59 < 50.0 26-Apr-21 SOIL CO-60 < 24.4 26-Apr-21 SOIL ZN-65 < 71.1 26-Apr-21 SOIL CS-134 < 26.0 26-Apr-21 SOIL CS-137 183.6 +/- 27.8 2021 Annual Radiological Environmental Operating Report Page C - 84 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Terrestrial Soil Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 26-Apr-21 SOIL K-40 10,874.0 +/- 717.5 26-Apr-21 SOIL MN-54 < 30.8 26-Apr-21 SOIL CO-58 < 33.6 26-Apr-21 SOIL FE-59 < 66.1 26-Apr-21 SOIL CO-60 < 24.1 26-Apr-21 SOIL ZN-65 < 63.0 26-Apr-21 SOIL CS-134 < 27.0 26-Apr-21 SOIL CS-137 112.2 +/- 38.6 02-Dec-21 SOIL K-40 13,209.0 +/- 1,161.0 02-Dec-21 SOIL MN-54 < 42.5 02-Dec-21 SOIL CO-58 < 60.2 02-Dec-21 SOIL FE-59 < 83.7 02-Dec-21 SOIL CO-60 < 42.4 02-Dec-21 SOIL ZN-65 < 144.3 02-Dec-21 SOIL CS-134 < 44.5 02-Dec-21 SOIL CS-137 176.2 +/- 59.2 2021 Annual Radiological Environmental Operating Report Page C - 85 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Meat Location: A1.42 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 13-Nov-21 DEER K-40 3,617.2 +/- 423.7 13-Nov-21 DEER MN-54 < 17.5 13-Nov-21 DEER CO-58 < 13.4 13-Nov-21 DEER FE-59 < 38.2 13-Nov-21 DEER CO-60 < 17.7 13-Nov-21 DEER ZN-65 < 34.0 13-Nov-21 DEER CS-134 < 18.0 13-Nov-21 DEER CS-137 < 16.9 13-Nov-21 DEER H-3 906.0 +/- 97.0 2021 Annual Radiological Environmental Operating Report Page C - 86 Wolf Creek Generating Station

Enclosure I Exposure Pathway - Ingestion Meat Location: R1.5 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 29-Apr-21 WILD TURKEY K-40 2,256.4 +/- 367.3 29-Apr-21 WILD TURKEY MN-54 < 11.0 29-Apr-21 WILD TURKEY CO-58 < 8.6 29-Apr-21 WILD TURKEY FE-59 < 15.9 29-Apr-21 WILD TURKEY CO-60 < 11.8 29-Apr-21 WILD TURKEY ZN-65 < 22.2 29-Apr-21 WILD TURKEY CS-134 < 13.7 29-Apr-21 WILD TURKEY CS-137 < 14.1 29-Apr-21 WILD TURKEY H-3 371.0 +/- 67.0 2021 Annual Radiological Environmental Operating Report Page C - 87 Wolf Creek Generating Station

Enclosure I APPENDIX D LAND USE CENSUS REPORT 2021 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

Enclosure I WOLF CREEK GENERATING STATION 2021 LAND USE CENSUS REPORT Prepared by:

12/08/2021 Joseph p. Augustyn Date Peer Review:

12/18/2021 Jon Matthew Vopat Date Approved by:

3/24/2022 Daniel Michel Date

Enclosure I EXECUTIVE

SUMMARY

The annual Land Use Census of rural residents within five miles of the Wolf Creek Generating Station (WCGS) has been completed in 2021 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.

2021 Land Use Census Report 1

Enclosure I RESULTS No changes were identified for the nearest occupied residence in each sector. Ten changes were noted for the nearest garden producing broadleaf vegetation. Three of the ten did not 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.

2021 Land Use Census Report 2

Enclosure I TABLE 1 2021 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 B3.35-QURD1755 C C1.92-16RD1655 None C3.58-RERD1675 D D2.33-RERD1520 None None E E1.78-QULA1451 None E4.40-TRRD1551 F F1.76-14RD1730 None F2.48-RERD1380 G G3.03-13RD1820 None G4.08-SHRD1234 H H3.09-12RD1711 None H4.95-10RD1726 J J3.70-11RD1540 None J4.37-PLRD1040 K K2.70-12LA1437 None None L L2.10-NARD1339 None L2.39-NARD1309 M M2.34-14RD1346 None None N N2.08-15RD1350 None N2.38-RODR9 P P2.76-HW751534 None P4.69-DEST337 Q Q2.35-MILA1619 None Q2.35-MILA1619 R R2.08-NALN1650 None None NOTE: Entries underlined indicate changes from the 2020 Land Use Census.

EXAMPLE: A2.60-17TE1527 "A" = Sector A "2.60" = 2.60 miles from the reactor "17TE1527" = address 2021 Land Use Census Report 3

Enclosure I TABLE 2 SECTOR 2020 NEAREST 2021 NEAREST RESIDENCE RESIDENCE A A2.60-17TE1527 A2.60-17TE1527 B B3.53-QURD1755 B3.53-QURD1755 C C1.92-16RD1655 C1.92-16RD1655 D D2.33-RERD1520 D2.33-RERD1520 E E1.78-QULA1451 E1.78-QULA1451 F F1.76-14RD1730 F1.76-14RD1730 G G3.03-13RD1820 G3.03-13RD1820 H H3.09-12RD1711 H3.09-12RD1711 J J3.70-11RD1540 J3.70-11RD1540 K K2.70-12LA1437 K2.70-12LA1437 L L2.10-NARD1339 L2.10-NARD1339 M M2.34-14RD1346 M2.34-14RD1346 N N2.08-15RD1350 N2.08-15RD1350 P P2.76-HW751534 P2.76-HW751534 Q Q2.35-MILA1619 Q2.35-MILA1619 R R2.08-NALN1650 R2.08-NALN1650 NOTE: Entries underlined indicate changes from the 2010 Land Use Census.

2021 Land Use Census Report 4

Enclosure I TABLE 3 2020 LAND USE CENSUS MILK AND GARDEN DATA SECTOR 2020 2021 2020 NEAREST 2021 NEAREST MILKING MILKING BROADLEAF BROADLEAF ANIMALS ANIMALS GARDEN GARDEN A None None A2.60-17TE1527 A2.60-17TE1527 B None None B4.09-18RD1739 B3.35-QURD1755 C None None C3.58-RERD1675 C3.58-RERD1675 D None None D2.33-RERD1520 None E None None E4.40-TRRD1551 E4.40-TRRD1551 F None None F2.44-RERD1391 F2.48-RERD1380 G None None G3.60-RERD1198 G4.08-SHRD1234 H None None H3.80-11RD1674 H4.95-10RD1726 J None None J3.70-11RD1540 J4.37-PLRD1040 K None None K4.10-NARD1120 None L None None L2.39-NARD1309 L2.39-NARD1309 M None None M3.69-LYLA1290 None N None None N2.08-15RD1350 N2.38-RODR9 P None None P2.94-16RD1309 P4.69-DEST337 Q None None Q2.35-MILA1619 Q2.35-MILA1619 R None None None None NOTE: Underlined entries indicate changes from the 2020 Land Use Census.

2021 Land Use Census Report 5

Enclosure I 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 3.53 5681 5000 6.58E-10 6000 4.84E-10 5.40E-10 5 C 3.58 5761 5000 2.51E-10 6000 1.85E-10 2.01E-10 11

  • D E 4.40 7081 7000 1.28E-10 8000 1.03E-10 1.26E-10 12 F 2.48 3991 3000 6.58E-10 4000 3.95E-10 3.97E-10 6 G 4.08 6566 6000 3.44E-10 7000 2.55E-10 2.94E-10 7 H 4.95 7966 7000 3.50E-10 8000 2.83E-10 2.85E-10 8 J 4.37 7033 5000 4.59E-10 6000 3.37E-10 2.11E-10 10
  • K L 2.39 3846 3000 1.02E-09 4000 6.11E-10 6.74E-10 4
  • M N 2.38 3830 3000 1.10E-09 4000 6.62E-10 7.36E-10 3 P 4.69 7548 7000 2.79E-10 8000 2.25E-10 2.49E-10 9 Q 2.35 3782 3000 1.53E-09 4000 9.17E-10 1.05E-09 2
  • R
  • Sector D, K, M, and R have no broadleaf gardens to report.

Originated by: Date: 12/07/2021 Verified by: Date: 12/18/2021 2021 Land Use Census Report 6