ML19123A098

(WCGS) - 2018 Annual Radiological Environmental Operating Report

ML19123A098
Person / Time
Site:	Wolf Creek
Issue date:	04/29/2019
From:	Benham R Wolf Creek
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RA 19-0052
Download: ML19123A098 (170)

Text

Ron Benham Manager Nuclear and Regulatory Affairs

. April 29, 2019 RA 19-0052 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Docket No. 50-482: 2018 Annual Radiological Environmental Operating Report To Whom It May Concern:

The purpose of this letter is to submit the enclosed Annual Radiological Environmental Operating Report, which is being submitted pursuant to Wolf Creek Generating Station (WCGS) Technical Specification 5.6.2. This report covers radiological environmental monitoring for WCGS for the period of January 1, 2018, through December 31, 2018.

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

Sincerely, Ron Benham RDB/rlt Enclosure cc: S. A. Morris (NRC), w/e B. K. Singal (NRC), w/e N. H. Taylor (NRC), w/e Senior Resident Inspector (NRC}, w/e P.O. Box 411 / Burlington, KS 66839 / Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HCNET

Enclosure to RA 19-0052 Wolf Creek Generating Station 2018 Annual Radiological Environmental Operating Report (169 pages including this page)

WOLF.CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION 2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT April 10, 2019

TABLE OF CONTENTS List of Tables ii.

List of Figures ii List of Charts ii Executive Summary 1 Introduction 1 I. Program Description 1

11. Discussion of Results 4 Ill. Program Revisions/Changes 9 IV. Program Deviations 10 V. lnterlaboratory Comparison Program 10 VI. Comparison to the Radioactive Effluent Release Program 10 Tables 12 Figures 21

• Charts 26 Appendix A - lnterlaboratory 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-29 Drinking Water C-45 Quarterly Drinking Water - Tritium C-53 Shoreline Sediment C-55 Fish C-57 Food/Garden C-66 Food/Crops C-75 Bottom Sediment C-78 Aquatic Vegetation C-94 Terrestrial Vegetation C-97 Soil C-99 Deer C-100 Appendix D - Land Use Census Report

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 26 3 OSL Dosimeters - Indicator and Control Locations 27 4 Historical TLD Nearsite Locations ahd Control Locations 28 5 Coffey County Lake Surface Water Tritium Data 29 6 Drinking Water Gross Beta (5 years) 30 7 Detected Cs-137 Activity in Bottom Sediment 31 ii

EXECUTIVE

SUMMARY

Plant-related activation, corrosion, or fission products were not detected during 2018 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 2018 in surface water, fish, and deer samples.

Nuclides detected in Radiological Environmental Monitoring Program (REMP) samples were below applicable Nuclear Regulato'ry 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 2018 Annual Radiological Environmental Operating Report for Wolf Creek Generating Station (WCGS) covers the period from January 1 through December 31, 2018. WCGS is located in Coffey County, Kansas, approximately five miles northeast of Burlington, Kansas.

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

This report contains a* description of the REMP conducted by Wolf Creek Nuclear Operating Corporation (WCNOC), a discussion of monitoring program results, the revisions or changes to the program, program deviations, the lnterlaboratory Comparison Program and a comparison to

• the Radioactive Effluent Release Program. The. lnterlaboratory 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 078-004, 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 078-004 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 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 1 of 31

the air particulate filters. Radioiodine canisters were analyzed weekly for 1-131.

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.

8. Direct Radiation Pathway Optically stimulated luminescence (OSL) dosimeters were used continuously at 42

• locations during the sample year to measure direct radiation. The OSLs were typically positioned roughly 3 to 4 feet above the ground in plastic thermostat boxes. Three OSLs were placed at each designated location. The OSLs were changed out quarterly and analyzed quarterly for gamma dose. Transit dose was measured and subtracted from the ambient dose. Indicator OSL sample locations are illustrated in Figure 2 and control sample locations are shown in Figure 5.

Control sample locations were 39 (Beto Junction) and 53 (near the intersection of 201h Road and Yearling Road) .

. C. Waterborne Pathway Gamma isotopic analysis was performed on the water samples. In addition to gamma isotopic analysis, analysis for 1-131 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 ReseNoir (JRR) control location and from the Coffey County Lake Spillway (SP) indicator location.

Quarterly grab samples of ground water were collected from seven wells. Six locations (C-10, C-49, F-1, G-2, J-1 and J-2) located hydrologically down gradient from the site .were used as indicator sample locations. Location 8-12 located hydrologically up gradient from the site was used as*a control location.

Drinking water was sampled at the water treatment facilities in the towns of Iola (indicator sample location 10-DW) and Burlington (control sample location BW-15). The Iola facility is located downstre~m of the Neosho River-Wolf Creek confluence and the Burlington facility is located upstream* of the Neosho River-Wolf Creek confluence. Composite samples were obtained monthly from automatic samplers at each location. The automatic drinking water samplers collected approximately .27 milliliters of water every two hours.

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

2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station . Page 2 of 31

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 per(ormed on these samples.

• Irrigated crop samples were obtained from indicator locations (NR-D1) and (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 076-004)

Duplicate ground water grab samples were obtained quarterly from indicator location C-49 and were labeled L-49. These duplicate samples served as laboratory quality checks. Gamma isotopic -analysis, 1-131 analysis and tritium analysis were performed on the ground water samples.

• Bottom sediment samples were collected semiannually from indicator sample locations at the Discharge Cove (DC), Essential Service Water (ESW) channel, Ultimate Heat Sink (UHS), and the control sample location at John Redmond Reservoir (JRR). Gamma isotopic analyses were performed on the bottom sediment samples. Fourteen samples collected from indicator locations were also analyzed for Fe-55. Two samples collected from UHS indicator locations were also analyzed for Ni-63, Sr-89 and Sr-90 activity. Two bottom sediment samples were

• collected from indicator sample locations at Stringtown Cemetery (SC) and the Makeup Discharge Structure (MUDS) 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), Discharge Cove (DC) 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.

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Soil was sampled from the Environmental Education Area (EEA). Gamma isotopic analysis was a

perform~d on the soil sample. This sample was collected as part of cooperative sampling effort with the KDHE. The sample locations are identified on Figure 4.

• Turkey was sampled from indicator sample location A2.0. Gamma isotopic analysis and tritium analysis was performed on the turkey sample. This sample was collected as part of a cooperative sampling effort with the KDHE. The sample location is identified on Figure 4.

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 2018 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/m 3 .

The 2018 weekly gross beta analyses range for indicator locations was 0.006 to 0.059 pCi/m 3

• The 2018 weekly gross beta analyses range was within the 1983 and 1984 pre-operational range. Additionally, the annual mean for indicator locations for 2018 (0.026 pCi/m 3 ) 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 2018 (0.026 pCi/m 3 ) was slightly higher than the annual mean of the control location (0.025 pCi/m 3 ). The indicator location with the highest gross beta annual mean was location 37 (0.026 pCi/m 3) and was slightly higher than the annual mean of the control location (0.025 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/m 3 for indicator locations and the annual mean for indicator locations was 0.069 pCi/m 3 . In 2018, the range for Be-7 detected activity was 0.060 to 0.117 pCi/m 3 for indicator locations and the annual mean for indicator locations was 0.082 pCi/m 3

• The control location annual mean for Be-7 detected activity (0.077 pCi/m 3 ) was slightly lower than the annual mean of the indicator locations (0.082 pCilm} The indicator location with the highest annual mean of detected Be-7 activity (0.087 pCi/ m ) was location 37. . * .

1-131 activity was not detected in the weekly analysis of radioiodine canisters at any location.

The AP 078-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2018 in air particulate filters and radioiodine canisters. No unusual-trends were noted.

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B. Direct Radiation Pathway Quarterly 9sL 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 2018 was 18.3 mR per standardized 90-day quarter. The annual mean of the control sample locations in 2018 was 18.5 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 50 (21.2 mR per standardized 90-day quarter) which is slightly higher than the annual mean of the control sample locations (18.5 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 have increased since 2010.

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. No change in trend was noted.

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 11,941 pCi/L and the range was 9101 to 14,775 pCi/L.

The detected tritium activity was below the 30,000 pCi/L AP 078-004 reporting level. Chart 5 illustrates the yearly averages of surface water tritium data for* the SP location. Chart 5 indicates the average tritium concentration of the SP location has declined the last three years.

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 078-004 required lower limits of detection were met. Radionuclides were not detected by the gamma isotopic analyses or by Fe-55 analyses.

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Tritium was the only activity detected during 2018 in surface water samples and no unusual trends were noted.

(2) Ground Water The AP 078-004 required lower limits of detection were met for 1-131, 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 2018 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 (3.02 pCi/L) was slightly lower when compared to the annual mean of the control sample location gross beta activity (3.05 pCi/L). The 2018 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 6A pCi/L.

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

Tritium was detected in the indicator sample location during the third quarter 2018 (252 pCi/L),

which is attributable to plant operation. Heavy rainfall increased outfall from Wolf Creek Cooling Lake and was detected downstream. 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 078-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2018 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 2018. The AP 078-004 required lower limits of detection were met. Plant-related activation,

• corrosion, or fission products were not detected during 2018 in shoreline sediment samples and no unusual trends were noted.

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 2018 Land Use Census.

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(2) Fish Naturally occurring K-40 activity was detected in fish samples obtained frorn 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 (7,474 pCi/kg annual mean). The detected tritium activity was attributable to plant operation. An adult consuming 21 kilograms of fish, at the maximum measured tritium concentration (9,791 pCi/kg), would receive a committed ~ffective 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 2018. The AP 078-004 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 8e-7 and K-40. 8e-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 078-004 required lower iimits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2018 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 078-004 required lower limits of detection were met. Plant-related activation, corrosion, or fission products were not detected during 2018 in crop samples and no unusual trends were noted.

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 three samples obtained from indicator locations (range 46.8 to 89.7 pCi/kg). Cs-137 was detected in one sample obtained from control location (95.7 pCi/kg).

2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 7 of 31

Cs-137 activity was detected in pre-operational samples. The Cs-137 activity detected in 2018 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 34 to 415 pCi/kg.)

The detected Cs..a137 activity in the samples collected from the indicator sample locations was likely due to fallout since the measured activity is within the decay corrected range of pre-operational Cs-137 detected activity.

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

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

Analysis for the Hard-to-Detect radionuclides was performed on two indicator location samples.

Sr-90 activity (range 32.4 to 32.6 pCi/kg) was detected in two bottom sediment sample collected from the Ultimate Heat Sink (UHS) area.

Sr-90 activity was detected in pre-operational soil samples. (Sr-90 activity detected in February 1985 soil samples was in the range of 85 to 380 pCi/kg. The decay corrected range of pre-operational Sr-90 activity detected is approximately 38 to 171 pCi/kg.) The detected Sr-90 activity in the bottom sediment collected from the UHS indicator sample location is likely due to fallout since the activity is below the decay corrected pre-operational range.

No other radionuclides were detected in bottom sediment samples. Plant-related activation, corrosion, or fission products were not detected during 2018 in b~ttom sediment samples and no unusual trends were noted. *

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

No other radionuclides were detected in aquatic vegetation samples. Plant-:related activation, corrosion, or fission products were not detected during 2018 in aquatic vegetation samples and no unusual trends were noted.

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(3) Terrestrial Vegetation Naturally occurring Be-7 and K-40 activity were detected in the terrestrial vegetation indicator location samples. No other radionuclides were detected in terrestrial vegetation. Plant-related activation, corrosion or fission products were not detected during 2018 in terrestrial vegetation and no unusual trends were noted.

(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 the soil sample (181.9 pCi/kg) obtained from the indicator location. 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 120 to 1,014 pCi/kg. The detected Cs-137 activity in soil sampled in 2018 is below the decay corrected pre-operational .

range and is likely due to fallout.

Plant-related activation, corrosion, or fission products were not detected during 2018 in soil samples and no unusual trends were noted.

(5) Turkey Naturally occurring K-40 activity was detected in the turkey sample obtained from the indicator location.

Tritium activity (612 pCi/kg) was also 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 (612 pCi/kg), would receive a committed effective dose equivalent of 0.003 mRem.

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

Ill. PROGRAM REVISIONS/CHANGES Procedure changes were made in AP 07B~004, Offsite Dose Calculation Manual (Radiological Environm~ntal Monitoring Program), in 2018. Procedure was reformatted in VEPROMS for future revisions.

• Unnecessary references and redundant notes were removed. 8hanges were made in Attachment B for steps involving handling of vendor records and vendor qualifications to clarify responsibilities.

I OSL Dosimeters data will no longer be excluded based on standard deviation. Data exclusion should be a rare exception. Due to the nature of OSLs and being in the environment, standard deviation is not a good indicator of data validity (Condition Report 00128355).

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

Location Sample Period Percent Explanation of Deviation/Comments Discrepancy/ Condition Report Number Hours Unavailable

--+----------------,

49 06/04/18- 06/11/18 5.1 / 8.5 Power Outage /

Condition Report 00124188 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 lnterlaboratory Comparison Program Results for Environmental, Inc., Midwest Laboratory. lntercomparison

. 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 0.245 mRem for 2018.

Using sample data obtained from the REMP,. an adult drinking two liters per day of surface water from Coffey County Lake, using the average tritium activity (11,941 pCi/L), would receive a committed effective dose equivalent of 0.545 mRem per year. For an adult eating 21 kg of fish per y~ar from Coffey County Lake, using the average tritium activity (7,474 pCi/kg), would 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 10 of 31

receive a committed effective dose equivalent of 0.010.mRem per year. Based upon the REMP

. results, the dose from both pathways was calculated to be 0.555 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 su*rtace water is for comparison purposes only.

The tritium dose value.s are being compared on a qualitative basis. It is not expected that the annual doses, as calculated in the Radioactive Effluent Release Report, would compare directly to those calculated from the REMP. The Radioactive Effluent Release Report provides a "snap shot" of potential dose resulting from the year's releases. The REMP data indicates the ,

accumulated result of releasing tritium into the lake since the start of plant operation. ,

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TABLE 1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DESCRIPTION (SAMPLE COLLECTION SPECIFIED BY AP 078-004)

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 1-131 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) 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 12 of 31

TABLE 1 (Cont.)

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

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

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

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

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

20).

The balance of the stations to be placed in special interest areas such as population centers (Locations 23, 32 & 52), nearby residences 2018 Annual Radiological Environmental. Operating Report Wolf Creek Generating Station Page 13 of 31

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).

2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

• Page 14 of 31

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 10-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 1-131 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 1O miles from the site if indicator locations are sampled.

2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 15 of 31

I 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).

Broad leaf Samples of available Monthly when avajlable Gamma isotopic Vegetation broad leaf 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).

2018 Annual Radiological Environmental Operating Report*

Wolf Creek Generating Station Page 16 of 31

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 C

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 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 17 of 31

TABLE 2 (Cont.)

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

Sample Type Location Distance from Direction Sector Identifier Reactor Dosimeters 46 1.6 WNW p 49 0.8 NNE B 50 3.6 ENE D 51 4.3 s J 52 3.6 SW L 53 10.8 ENE D Surface Water JRR 3.7 w N SP 3.2 SSE H1 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 10-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 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 18 of 31

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) A2.0 2.0 N A 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 19 of 31

l I TABLE 3 OSL Dosimeter Results Location Qtr.1 Qtr. 2 Qtr. 3 Qtr. 4 Total Annual (mR) (mR) (mR) (mR) Exposure (mR) 1 18.5 20.1 21.0 19.4 79.0 2 17.7 18.9 18.3 16.5 71.4 4 18.6 20.5 18.6 18.7 76.4 5 17.5 18.5 17.6 19.1 72.7 7 18.0 20.5 18.2 17.2 73.9

(

8 18.0 21.0 20.9 20.9 80.8 9 13.0 18.6 16.6 17.2 65.4 11 18.0 20.0 19.6 20.1 77.7 12 17.0 20.0 19~6

• 17.9 74.5 13 18.0 22.9 22.2 19.0 82.1 14 19.5 21.4 21.6 19.0 81 .. 5 15 16.7 19.5 18.0 18.7 72.9 16 16.5 17.1 . 17.3 15.4 66.3 17 15.5 19.5 19.3 19.3 73.6 18 18.0 17.9 18.3 17.2 71.4 19 19.4 19.5 18.6. 16.4 73.9 20 17.3 20.5 15.6 17.5 70.9 22 20.0 20.8 19.3 22.2 82.3 23 17.3 20.0 . 19.3 20.1 76.7 24 18.5 18.1 20.6 18.3 75.5 25 14.6 16.6 17.0 16.1 64.3' 26 17.0 18.6 17.3 15.7 68.6 27 .13.5 19.5 20.6 19.4 73.0 29 14.6 14.1 15.0 14.7 58.4 30 17.5 17.6 18.0 16.8 69.9 32 17.7 17.6 18.6 17.2 71.1 34 20.1 19.5 22.6 21.1 83.3 35 17.0 21.4 18.9 19.8 77.1 36 16.0 20.0. 21.6 17.3 74.9 37 15.5 18.5 18.6 17.9 70.5 38 18.5 19.5 20.3 21.5 79.8 39 18.0 17.1 18.3 15.4 68.8 41 18.5 19.2 20.6 20.1 78.4 42 11.2 11.0

• 11.1 12.6 45.9 43 11.8 14.4 15.5 11.1 52.8 44 17.0 18.5 20.0 . 16.8 72.3 46 15.5 18.5 19.6 20.1 73.7 49 13.9 19.0 18.3 .- 15.4 66.6' 50 18.5 22.9 21.6 21.9 84.9 51 18.4 17.1 19.3 19.3 74.1 52 18.0 21.7. 20.3, 21.9 81.9

,53 21.1 19.5 20.6 17.6 78.8 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 20 of 31.

FIGURE 1 Q C D

I E

I I AIRBORNE PATHWAY SAMPLING LOCATIONS

• = AIRBORNE PARTICULATE AND RADIOIODINE 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 21 of 31

FIGURE2 DIRECT RADIATION PATHWAY SAMPLING.LOCATIONS

• = DOSIMETER LOCATIONS 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 22 of 31

• FIGURE 3 WATERBORNE PATHWAY SAMPLING LOCATIONS e =DRINKING WATER .A: = SURFACE WATER a = GROUND WATER * = SHORELINE SEDIMENT

~* = aoTTOM SEDIMENT ~ = AQUATiC. VEGETATION 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 23 of 31

FIGURE 4

-- --T

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.__,__.,,__ .---i-----t--.-~r'Qsr;*

\':i INGESTION PATHWAY SAMPLING LOCATIONS a = FISH (JRR) *= BROADLEAF VEGETATION *= SOIL Et"~= FISH (CCL) ~~= TERRESTRIAL VEGETATION ~ =Turkey 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 24 of 31

FIGURE 5 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 25 of 31

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--Smoothed Avg. Control Location (48) --Smoothed Avg. Control Location (53) 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page 26 of 31

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....~/"'\I Midwest Laboratory 700 Landwehr Road* Northbrook, IL 60062-2310

• phone (847) 564-0700

• fax (847) 564-4517 APPENDIX A INTERLABORATORY AND INTRALABORATORY COMPARISON PROGRAM RESULTS NOTE: Appendix A is updated four times a year. .The complete appe_ndix is included in March, June, September and December monthly progress reports only.

January, 2018 through Dec~mber, 2018

Appendix A lnterlaboratory/ lntralaboratory Comparison Program Results Environmental, Inc., Midwest Laboratory has participated in interlaboratory comparison (crosscheck) programs since the formulation of it's 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 laboratory's 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.

Table A-1 lists results that 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 in-house "spiked" samples for the past twelve months. All samples are prepared using NIST traceable sources. Acceptance criteria is detailed on Attachment A page A2.

Data for previous years available upon request.

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

Table A-5 lists analytical results from the in-house "duplicate" program for the past twelve months. The Precision Acceptance limit is +/-25% of the mean for Sr-89,90, Gross Alpha and Gross Beta or the 2-sigma uncertainty overlaps the mean value. For all other analytes the precision acceptance limit is

+/-20% of the mean .or the 2-sigma uncertainty overlaps the mean value.

Complete analytical data for duplicate analyses is available upon request.

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

I Table A-7 lists results that were obtained through participation in the MRAD PT Study Proficiency Testing Progra administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurement Laboratory Quality Asses~ment Program (EML).

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

A1

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

Gamma Emitters 0.8 to 1.2 Strontium-89, 0.8 to 1.2 Strontium-90 Potassium-40 0.8 to 1.2 Gross alpha 0.5 to 1.5 Gross beta 0.8 to 1.2 Tritium 0.8 to 1.2 Radium-226, 0.7to 1.3 Radium-228 Plutonium 0.8 to 1.2 lodine-129, 0.8 to 1.2 lodine-131 Nickel-63, 0.7 to 1.3 Technetium-99, Uranium-238 lron-55 0.8 to 1.2 Other Analyses 0.8 to 1.2 A2

TABLEA-1. lnterlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.

RAD study Concentration (pCi/L)

Lab Code Reference Analysis Laboratory ERA Control Date Result Result Limits Acceptance ERW-52 1/8/2018 Sr-89 61.6 +/- 5.8 65.2 52.9 - 73.2 Pass ERW-52 1/8/2018 Sr-90 39.7 +/- 2.3 39.2 28.2 -45.1 Pass ERW-54 1/8/2018 Ba-133 89.7 +/-4.7 95.1 80.2 -105 Pass.

ERW-54 1/8/2018 Cs-134 62.1 +/- 5.4 65.6 53.4 - 72.2 Pass ERW-54 1/8/2018 Cs-137 111.2 +/-6.1 112 101 -126 Pass ERW-54 1/8/2018 Co-60 115.8 +/-4.7 114.0 103.0 - 128.0 Pass ERW-54 1/8/2018 Zn-65 292.2 +/- 14.0 277.0 249 -324 Pass ERW-52 1/8/2018 Gr. Alpha 70.1 +/- 3.0 72.4 38.1 - 89.2 Pass ERW-52 1/8/2018 Gr. Beta 47.4 +/- 1.4 54.8 37.5 -61.7 Pass ERW-58 1/8/2018 1-131 25.3 +/- 1.0 28.1 23.4 - 33.0 Pass ERW-61 1/8/2018 Ra-226 12.4 +/- 0.4 14.20 10.60 - 16.30 Pass ERW-60 1/8/2018 Ra-228 4.9 +/- 0.8 4.21 2.43 - 5.81 Pass ERW-60 1/8/2018 Uranium 52.2 +/- 0.9 58.6 47.8 -64.5 Pass ERW-62 1/8/2018 H-3 21,780 +/- 437 21,200 18,600 - 23,300 Pass ERW-2555 7/9/2018 Sr-89 62.8 +/-4.0 62.7 50.7. - 70.6 Pass ERW-2555 7/9/2018 Sr-90 40.1 +/- 1.3 40.1 29.5 - 46.1 Pass ERW-2557 7/9/2018 Ba-133 23.1 +/- 2.3 25.6 19.9 - 29 Pass ERW-2557 7/9/2018 Cs-134 15.2+/-1.7 15.7 11.4 -18.2 Pass ERW-2557 7/9/2018 Cs-137 22.3 +/- 4.9 192 173 - 213 Failb ERW-2557 7/9/2018 Co-60 110.4 +/- 3.7 119.0 107 -133 Pass ERW-2557 7/9/2018 Zn-65 189.5 +/- 7.5 177.0 159 - 208 Pass ERW-2559 7/9/2018 Gr. Alpha 13.5 +/- 0.7 16.0 7.79 -22.6 Pass ERW-2559 7/9/2018 Gr. Beta 41.1 +/- 0.9 49.0 33.2 - 56.1 Pass ERW-2561 7/9/2018 1-131 24.9 +/- 0.9 28.1 23.4 - 33.0 Pass ERW-2563 7/9/2018 Ra-226 9.0 +/- 0.3 9.08 6.81 -10.6 Pass ERW-2563 7/9/2018 Ra-228 3.2 +/- 0.4 2.28 1.07 - 3.60 Pass ERW-2563 7/9/2018 Uranium 38.2 +/- 1.4 51.8 42.2 - 57.1 Failc ERW-2565 7/9/2018 H-3 21,039 +/- 302 20,400 17,900 - 22,400 Pass*

ERW-3832b 10/7/2016 Ba-133 57.0 +/- 3.1 54.9 45 -61 Pass ERW-3832b 10/7/2016 Cs-134 79.2 +/- 3.0 81.8 67 -90 Pass ERW-3832b 10/7/2016 Cs-137 222.4 +/-4.5 210 189 - 233 Pass ERW~3832b 10/7/2016 Co-60 67.7 +/- 3.5 64.5 58 - 73 Pass ERW-3832b 10/7/2016 Zn-65 274.1 +/- 3.0 245 220 -287 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 A transcription error caus_ed the Cs-137 result submitted to be understated by a factor of 10.

The actual result obtained was slightly higher than the acceptance criteria for the study.

A "Quick Response" proficiency test was analyzed to help determine the cause of the high result. (See ERW-3832 above)

No definitive cause for the previous high Cs-137 result was determined.

c An investigation is underway to determine the reason for the unacceptable Uranium PT result.

Al-1

a TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaS0 4 : Dy Cards).

mrem Lab Code Irradiation Delivered Reported b Performance c Date Description Dose Dose Quotient (P)

Environmental. Inc. Group 1 2018-1 11/15/2018 Spike 1 97.0 81.6 -0.16 2018-1 11/15/2018 Spike 2 97.0 88.5 -0.09 2018-1 11/15/2018 Spike 3 97.0 87.9 -0.09

• 2018-1 11/15/2018 Spike 4 97.0 85.6 -0.12.

2018-1 11/15/2018 Spike 5 97.0 86.5 -0.11 2018-1 11/15/2018 Spike 6 97.0 89.0 -0.08 2018-1 11/15/2018 Spike 7 97.0 85.1 -0.12 2018-1 11/15/2018 Spike 8 97.0 90.6 -0.07 2018-1 . 11/15/2018 Spike 9 97.0 91.3 -0.06 2018-1 11/15/2018 Spike 10 97.0 84.5 -0.13 2018-1( 11/15/2018 Spike 11 97.0 90.8 -0.06 2018-1 11/15/2018 Spike 12 97.0 93.8 -0.03 2018-1. 11/15/2018 Spike 13 97.0 85.3 -0.12 2018-1 11/15/2018 Spike 14 97.0 85.5 -0.12 2018-1 11/15/2018 Spike 15 97.0 86.9 -0.10 2018-1 11/15/2018 Spike 16 97.0 88.6 -0.09 2018-1 11/15/2018 Spike 17 97.0 83.1 -0.14 2018-1 11/15/2018 Spike 18 97.0 85.4 -0.12 2018~1 11/15/2018 Spike 19 97.0 83.3 -0.14 2018-1 11/15/2018 Spike 20 97.0 85.5 -0.12 Mean (Spike 1-20) 86.9 -0.10 Passd Standard Deviation (Spike 1-20) 3.1 0.03 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

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

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

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

A2-1

a TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaS0 4 : Dy Cards).

mrem b

Lab Code Irradiation Delivered Reported Performance c Date Description Dose Dose Quotient (P)

Environmental. Inc. Group 2 2018-2 11/15/2018 Spike 21 143.0 130.3 -0.09 2018-2 11/15/2018 Spike 22 143.0 128.1 -0.10 2018-2 11/15/2018 Spike 23 143.0 134.4 -0.06 2018-2 11/15/2018 Spike 24 143.0 129.0 -0.10 2018-2 11/15/2018 Spike 25 143.0 132.5 -0.07 2018-2 11/15/2018 Spike 26 143.0 126.1 -0.12 2018-2 11/15/2018 Spike 27 143.0 126.2 -0.12 2018-2 11/15/2018 Spike 28 143.0 122.4 -0.14 2018-2 11/15/2018 Spike 29 143.0 118.8 -0.17 2018-2 11/15/2018 Spike 30 143.0 123.2 -0.14 2018-2 11/15/2018 Spike 31 143.0 137.2 -0.04 2018-2 11/15/2018 Spike 32 143.0 144.4 0.01 2018-2 1-1/15/2018 Spike 33 143.0 137.8 -0.04 2018~2 11/15/2018 Spike 34 143.0 140.2 -0.02 2018-2 11/15/2018 Spike 35 143.0 143.8 0.01 2018-2 11/15/2018 Spike 36 143.0 146.7 0.03 2018-2 11/15/2018 Spike 37 143.0 150.0 0.05 2018-2 11/15/2018 Spike 38 143.0 126,1 -0.12 2018-2 11/15/2018 Spike 39 143.0 136.2 -0.05 2018-2 11/15/2018 Spike 40 143.0 144.8 0.01 Mean (Spike 21-40) 133.9 -0.06 Passd Standard Deviation (Spike 21-40) 9.0 0.06 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. = 1.20. mrem/cGy = 1000.

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

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

A2-2

TABLEA-3. In-House "Spiked" Samples Concentration a Lab Code b Date Analysis Laboratory results Known Control Ratio 2s, n=1 ° Activity Limitsd Acceptance Lab/Known SPW-1749 4/21/2016 Fe-55 1,576 +/- 81. 1,482 1,186 -1,778 Pass 1.06 SPW-95 1/11/2018 H-3 16,457 +/- 381 16,507 13,206 - 19,808 Pass 1.00 SPW-109 1/12/2018 Sr-90 18.9 +/- 1.7 17.9 14.3 - 21.5 Pass 1.06 SPW-175 1/19/2018 H-3 16,261 +/- 382 16,507 13,206 -19,808 Pass 0.99 SPW-210 1/23/2018 H-3 16,461 +/- 382 16,507 13,206 -19,808 Pass 1.00 SPW-212 1/10/2018 Ra-226 12.9 +/- 0.4 12.3 8.6 - 16.0 Pass 1.05 SPW-272 1/30/2018 H-3 16,607 +/- 384 16,507 13,206 - 19,808 Pass 1.01 W-013118 4/29/2016 Cs-134 33.9 +/- 7.4 36.2 29.0 - 43.4 Pass 0.94 W-013118 4/29/2016 Cs-137 80.0 +/- 7.9 71.9 57.5 - 86.3 Pass 1.11 SPW-330 2/1/2018 Ni-63 168 +/-2 198 139 - 258 Pass 0.85 SPW-338 2/2/2018 H-3 16,512 +/- 381 16,507 13,206 - 19,808 Pass 1.00 SPW-384 2/6/2018 H-3 16,429 +/- 380 16,507 13,206 - 19,808 Pass 1.00 W-020618 4/29/2016 Cs-134 39.0 +/- 12.0 36.2 29.0 - 43.4 Pass 1.08 W-020618 4/29/2016 Cs-137 81.0 +/- 15.7 71.9 57.5 - 86.3 Pass 1.13 SPW-461 2/13/2018 H-3 16,799 +/- 385 16,507 13,206 - 19,808 Pass 1.02 SPW-516 2/19/2018 H-3 16,323 +/- 382 16,507 13,206 - 19,808 Pass 0.99 SPW-556 2/8/2018 Ra-226 12.2 +/- 0.3 12.3 8.6 - 16.0 Pass 0.99 SPW-582 2/22/2018 H-3 16,200 +/- 380 16,507 13,206 - 19,808 Pass 0.98 SPW-609 2/23/2018 H-3 16,467 +/- 383 16,507 13,206 - 19,808 Pass 1.00 SPW-650 2/21/2018 Ra-226 11.8 +/- 0.5. 12.3 8.6 - 16.0 Pass 0.96 SPW-666 2/28/2018 Gr. Alpha 67.1 +/- 2.8 72.4 36.2 - 108.6 Pass 0.93 SPW-666 2/28/2018 Gr. Beta 48.1 +/- 1.4 54.8 43.8 - 65.8 Pass 0.88 W-022818 4/29/2016 Cs-134 32.7 +/- 8.5 36.2 29.0 -43.4 Pass 0.90 W-022818 4/29/2016 Cs-137 73.8 +/- 9.3 71.9 57.5 - 86.3 Pass 1.03 SPW-748 3/6/2018 H-3 16,209 +/- 381 16,507 . 13,206 ~ 19,808 Pass 0.98 SPW-787 3/8/2018 H-3 16,934 +/- 388 16,507 13,206 - 19,808 Pass 1.03 W-030718 4/29/2016 Cs-134 33.4 +/-7.9 36.2 29.0 - 43.4 Pass 0.92 W-030718 4/29/2016 Cs-137 78.9 +/- 9.6 71.9 57.5 - 86.3 Pass 1.10 SPW-885 3/15/2018 H-3 16,475 +/- 384 16,507 13,206 -19,808. Pass 1.00 SPW-931 3/20/2018 H-3 16,467 +/- 384 16,507 13,206 - 19,808 Pass 1.00 SPW-957 3/12/2018 Ra-226 11.4 +/-0.4 12.3 8.6 -16.0 Pass 0.93 SPW-969 3/23/2018 Ni-63 260 +/- 12 329 230 -428 Pass 0.79 W-031418 4/29/2016 Cs-134 36.9 +/- 11.2 36.2 29.0 -43.4 Pass 1.02 W-031418 4/29/2016 Cs-137 . 82.3 +/- 15.5 71.9 57.5 - 86.3 Pass 1.14 SPW-985 3/27/2018 H-3 16,544 +/- 386 16,507 13,206 - 19,808 Pass 1.00 SPW-1037 4/4/2018 H-3 16,298 +/- 384 16,507 13,206 - 19,808 . Pass 0.99 SPW-1149 4/12/2018 H-3 16,361 +/- 383 16,507 13,206 - 19,808 Pass 0.99 SPW-1200 4/13/2018 U-238 44.2 +/- 2.3 41.7 29.2 -54.2 Pass 1.06 SPW-1426 4/20/2018 H-3 16,573 +/- 390 16,507 13,206 -19,808 Pass 1.00 SPW-1454 4/24/2018 H-3 16,495 +/- 384 16,507 13,206 - 19,808 Pass 1.00 SPW-1493 4/26/2018 Ra-228 4.59 +/- 1.10 4.21 2.95 -5.47 Pass 1.09 SPW-1518 4/27/2018 H-3 16,483 +/- 382 16,507 13,206 - 19,808 Pass 1.00 SPW-1522 4/27/2018 Tc-99 105 +/-2 108 75 - 140 Pass 0.98 W-050118 4/29/2016 Cs-134 35.2 +/- 9.9 36.2 29.0 - .43.4 Pass 0.97 W-050118 4/29/2016 Cs-137 82.4 +/- 7.7 71.9 57.5 - 86.3 Pass 1.15.

A3-1

TABLE A-3. In-House "Spiked" Samples Concentration

• Lab Code b Date Analysis Laboratory results Known Control Ratio 2s,n=1° Activity Limitsd Acceptance Lab/Known SPW-1573 5/2/2018 Gr. Alpha 25.2 +/- 0.5 20.1 10.1 - 30.2 Pass 1.25 SPW-1573 5/2/2018 Gr. Beta 28.2 +/- 0.3 27.5 22.0 -33.0 Pass 1.03 SPW-1618 5/3/2018 H-3 14,834 +/- 366 16;507 13,206 - 19,808 Pass 0.90 W-050318 4/29/2016 Cs-134 32.9 +/- 7.6 36.2 29.0 -43.4 Pass 0.91 W-050318 4/29/2016 Cs-137 83.1 +/- 8.5 71.9 57.5 -86.3 Pass 1.16 SPW-1644 5/4/2018 Sr-90 20.0 +/- 1.3 17.9 14.3 - 21.5 Pass 1.12 W-050718 4/29/2018 Cs-134 42.4 +/-8.5 36.2 29.0 -43.4 Pass 1.17 W-050718 4/29/2018 Cs-137 80.6 +/- 13.6 71.9 57.5 -86.3 Pass 1.12 SPW-1695 5/8/2018 H-3 16,450 +/- 384 16,507 13,206 -19,808 Pass 1.00 W-050818 4/29/2016 Cs-134 32.3 +/- 6.9 36.2 29.0 -43.4 Pass 0.89 W-050818 4/29/2016 Cs-137 73.0 +/- 8.2 71.9 57.5 - 86.3 Pass 1.02 SPW-1780 5/11/2018 H-3 16,784 +/- 388 16,507 13,206 -19,808 Pass 1.02 W-051518 4/29/2016 Cs-134 33.0 +/- 6.7 36.2 29.0 -43.4 Pass 0.91 W-051518 4/29/2016 Cs-137 76.0 +/- 7.4 71.9 57.5 - 86.3 Pass 1.06 W-051718 4/29/2016 Cs-134 35.1 +/-5.7 36.2 29.0 -43.4 Pass 0.97 W-051718 4/29/2016 Cs-137 73.7 +/- 6.7 71.9 57.5 -86.3 Pass 1.03 SPW-1897 5/18/2018 H-3 16,650 +/- 387 16,507 13,206 - 19,808 Pass 1.01 SPW-1899 5/18/2018 H-3 16,754 +/- 365 16,507 13,206 -19,808 Pass 1.01 W-052418 4/29/2016 Cs-134 33.9 +/- 6.2 36.2 29.0 -43.4 Pass 0.94 W-052418 4/29/2016 Cs-137 78.8 +/-7.4 71.9 57.5 -86.3 Pass 1.10 SPW-1994

• 5/24/2018 H-3 16,488 +/- 384 16,507 13,206 -19,808 Pass 1.00 W-053118 4/29/2016 Cs-134 38.9 +/- 9.5 36.2 29.0 -43.4 Pass 1.07 W-053118 4/29/2016 Cs-137 74.0 +/- 7.5 71.9 57.5 - 86.3 Pass 1.03 SPW-2042 5/31/2018 H-3 16,901 +/- 390 16,507 13,206 - 19,808 Pass 1.02 W-060518 4/29/2016 Cs-134 33.0 +/- 10.1 36.2 29.0 -43.4 Pass 0.91 W-060518 4/29/2016 Cs-137 83.3 +/- 8.7 71.9 57.5 - 86.3 Pass 1.16 SPW-2186 6/6/2018 H-3 16,551 +/- 385 16,507 13,206 - 19,808 Pass 1.00 SPW-2914 6/19/2018 Ra-226 12.7 +/- 0.4 12.3 8.6 -16.0 Pass 1.03 SPW-2437 6/27/2018 Sr-90 18.0+/-1.1 17.9 14.3 - 21.5 Pass 1.00 SPW-2447 6/29/2018 H-3 16,595 +/- 387 16,507 13,206 -19,808 Pass 1.01 W-070518 4/29/2016 Cs-134 38.9 +/- 8.1 36.2 29.0 -43.4 Pass 1.08 W-070518 4/29/2016 Cs-137 73.4 +/- 9.4 71.9

• 57.5: 86.3 Pass 1.02 SPW-2546 7/10/2018 H-3 15,949 +/- 373 16,507 13,206 -19,808 Pass 0.97 W-071218 4/29/2016 Cs-134 33.1 +/- 7.7 36.2 29.0 -43.4 Pass 0.91 W-071218 4/29/2016 Cs-137 74.5 +/- 7.7 71.9 57.5 - 86.3 Pass 1.04 SPW-2706 7/16/2018 H-3 15,474.7 +/- 366.6 16,507 13,206 - 19,808 Pass 0.94 SPW-2772 7/19/2018 H-3 15,994.0 +/- 374.0 16,507 13,206 -19,808 Pass 0.97 SPW-2811 7/20/2018 Gr. Alpha 21.1 +/- 0.4 20.1 10.1-30.2 Pass 1.05 SPW 2811 0 7/20/2018 Gr. Beta 26.9 +/- 0.3 27.5 22.0 - 33.0 Pass 0.98 W-072118 4/29/2016 Cs-134 33.6 +/- 7.3 36.2 29.0 -43.4 Pass 0.93 W-072118 4/29/2016 Cs-137 80.3 +/- 7.9 71.9 57.5 -86.3 Pass 1.12 SPW-3689 7/23/2018 Ra-226 12.7 +/- 0.3 12.3 8.6 - 16.0 Pass 1.03 W-072718 2/1/2017 U-234 26.8 +/- 3.4 31.4 22.0 -40.8 Pass 0.85 W-072718 2/1/2017 U-238 24.1 +/- 3.2 32.4 22.7 -42.1 Pass* 0.74 SPW-3018 7/31/2018 H-3 16,166 +/- 376 16,507 13,206 -19,808 Pass 0.98 SPW-3154 8/6/2018 H-3 15,686 +/- 370 16,507 13,206 -19,808 Pass 0.95 W-081218 4/29/2016 Cs-134 38.6 +/- 11.5 36.2 29.0 -43.4 Pass 1.07 W-081218 4/29/2016 Cs-137 83.7 +/- 13.4 71.9 57.5 - 86.3 Pass . 1.16 A3-2

TABLE A-3. In-House "Spiked" Samples Concentration a Lab Code b Date Analysis Laboratory results Known Control Ratio 2s, n=1 ° Activity Limits d Acceptance Lab/Known SPW-3278 8/16/2018 H-3 15,587 +/- 370 16,507 13,206 - 19,808 Pass 0.94 SPW-3378 8/23/2018 Ni-63 378 +/-44 465 325 -604 Pass 0.81 SPW-3420 8/23/2018 H-3 15,536 +/- 368 16,507 13,206 - 19;808 Pass 0.94, SPW-3691 8/23/2018 Ra-226 15.5 +/- 0.4- 12.3 8.6 - 16.0 Pass 1.26 SPW-3477 8/27/2018 Ra-228 11.3 +/- 1.6 15.1 10.6 - 19.7 Pass 0.75 W-082818' 4/29/2016 Cs-134 33.0 +/- 2.7 36.2 29.0 -43.4 Pass 0.91 W-082818 4/29/2016 Cs-137 80.7 +/- 3.0 71.9 57.5 -86.3 Pass 1.12 SPW-3648 917/2018 H-3 15,876 +/- 371 16,507 13,206 - 19,808 Pass *o.96 SPW-4755 9/7/2018 Ra-226 11.2 +/- 0.3 12.3 8.6 - 16.0 Pass 0.91 W-091118 4/29/2016 Cs-134 35.3 +/- 2.7 36.2 29.0 -43.4 Pass 0.98 W-091118 4/29/2016 Cs-137 80.7 +/- 3.2 71.9 57.5 -86.3 Pass. 1.12 SPW-3843 9/19/2018 H-3 15,759 +/- 372 16,507 13,206 -19,808 Pass 0.95 W-092818 4/29/2016 Cs-134 36.1 +/- 10.0 36.2 29.0 -43.4 Pass 1.00 W-092818 4/29/2016 Cs-137 73.6 +/- 9.9 71.9 57.5 -86.3 Pass 1.02 SPW-3991 10/1/2018 H-3 15,614 +/- 369 16,507 13,206 - 19,808 Pass 0.95 SPW-4105 10/5/2018 H-3 15,669 +/- 370 16,507 13,206 - 19,808 Pass 0.95 W-101118 4/29/2016 Cs-134 33.5 +/- 3.1 36.2 29.0 -43.4 Pass 0.92 W-101118 4/29/2016 Cs-137 79.7 +/- 3.2 71.9 57.5 -86.3 Pass 1.11 SPW-4205 10/12/2018 H-3 15,821 +/- 372 16,507 13,206 ~ 19,808 Pass 0.96 SPW-4274 10/17/2018 H-3

• 15,575 +/- 369 16,507 13,206 -19,808 Pass 0.94 SPW-4596 10/31/2018 H-3 15,650 +/- 369 16,507 13,206 ~ 19,808 Pass 0.95 SPW-4682 11/1/2018 H-3 15,742 +/- 371 16,507 13,206 -19,808 Pass 0.95 SPW-4684 11/1/20.18 Sr-90 19.1 +/- 1.2 17.9 14.3 - 21.5 Pass 1.07 SPW-4790 11/9/2018 H-3 15,887 +/- 373 16,507 13,206 -19,808 Pass 0.96 SPW-4839 11/13/2018 Ni-63 381 +/-43 465 326 -605 Pass 0.82

• sPW-4863 11/16/2018 H-3 15,610 +/- 370 16,507 13,206 - 19,808 Pass 0.95

, W-111618 4/29/2016 Cs-134 38.0 +/- 12.4 36.2 29.0 -43.4 Pass 1.05 W-111618 4/29/2016 Cs-137 83.8 +/- 13.8 71.9 57.5 -86.3 Pass 1.17 SPW-5049 11/30/2018 H-3 15,370 +/- 366 16,507 13,206 - 19,808 Pass 0.93 SPW-5148 12/7/2018 H-3 . 15,522 +/- 368 16,507 13,206 -19,808

• Pass 0.94 W-121118 4/29/2016 Cs-134 39.4 +/- 7.9 36.2 29.0 -43.4 Pass 1.09 W-121118 4/29/2016 Cs-137 78.5 +/- 7.7 71.9 57.5 -86.3 Pass 1.09 W-121218 4/29/2016 Cs-134 42.0 +/- 13.8 36.2 29.0 -43.4 Pass 1.16 W-121218 4/29/2016 Cs-137 79.2 +/- 13.1 71.9 57.5 -86.3 Pass 1.10 W-121318 4/29/2016 Cs-134 35.1 +/-7.8 36.2 29.0 - 43.4 Pass 0.97 W-121318 4/29/2016 Cs-137 77.5 +/- 8.4 71.9 57.5 -86.3 Pass 1.08 SPW-5279 12/14/2018 H-3 15,686 "+/- 370 16,507 13,206 - 19,808 Pass 0.95 W-121418 4/29/2016 Cs-134 34.5 +/- 8.2 36.2 29.0 -43.4 Pass 0.95 W-121418 4/29/2016 Cs-137 82.7 +/- 8.0 71.9 57.5 -86.3 Pass 1.15 W-121718 4/29/2016 Cs-134 34.9 +/- 10.5 36.2 29.0 -43.4 Pass 0.96 W-121718 4/29/2016 Cs-137 80.3 +/- 8.1 71.9 57.5 - 86.3 Pass 1.12 SPW-5351 12/19/2018 H-3 15,855 +/- 375 16,507 13,206 - 19,808 Pass 0.96 SPW-5404 12/31/2018 H-3 15,179+/-365 16,507 13,206 - 19,808 Pass 0.92

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

b Laboratory codes : W (Water), Ml (milk); AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), !.J (urine).

0 Results are based on single determinations.

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

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

A3-3

TABLEA-4. In-House "Blank" Samples Concentration "

Lab Code Sample Date Analysisb Laboratory results (4.66cr) Acceptance Type LLD Activit{ Criteria (4.66 cr)

SPW-94 Water 1/11/2018 H-3 154 1 +/- 74 200 SPW-108 Water 1/12/2018 Sr-89 0.63 0.41 +/- 0.53 5

. SPW-108 Water 1/12/2018 Sr-90 0.55 0.05 +/- 0.26 SPW-174 Water 1/19/2018 H-3 152 23 +/- 73 200 SPW-209 Water 1/23/2018 H-3 154 78 +/- 78 200 SPW-211 Water .1/10/2018 Ra-226 0.03 0.19 +/- 0.03 2 SPW-213 Water 1/23/2018 1-131 0.23 -0.05 +/- 0.13 1 SPW-271 Water 1/30/2018 H-3 156 - 36 +/- 77 200 SPW-329 Water 2/1/2018 Ni-63 74 -13 +/- 45 200 SPW-337 Water 2/2/2018 -H-3 154 -16 +/- 71 200 SPW-385 Water 2/6/2018 H-3 150 -19 +/- 71 200 SPW-461 Water 2/13/2018 H-3 156 56 +/- 80 200 SPW-515 Water 2/19/2018 H-3 153 -1 +/- 80 200 SPW-555 Water 2/8/2018 Ra-226 0.04 0.14 +/-0.03 2 SPW-581 Water 2/22i2018 H-3 156 43 +/-77 200 SPW-608 Water 2/23/2018 H-3 151 58 +/-75 200 SPW-649 Water 2/21/2018 Ra-226 0.04 0.17 +/-0.03 2 SPW-665 Water 2/28/2018 Gr. Alpha 0.43 0.70 +/- 0.36 2 SPW-665 Water 2/28/2018 Gr. Beta 0.68 0.86 +/- 0.51 4 SPW-747 Water 3/6/2018 H-3 154 11 +/- 82 200 SPW-786 Water 3/8/2018 H-3 156 62 +/- 76 200 SPW-865 Water 3/14/2018 1-131 0.18 0.07 +/- 0.10 1 SPW-930 Water 3/20/2018 H-3 155 44 +/-84 200 SPW-956 Water 3/12/2018 Ra-226 0.03 0.18 +/- 0.03 2 SPW-984 Water 3/27/2018 H-3 153 32 +/- 82 200 SPW-1036 Water 4/4/2018 H-3 162 14 +/- 77 200 SPW-1148 Water 4/12/2018 H-3 159 -15 +/- 73 200 SPW-1202 Water 4/13/2018 U-234 0.15 0.00 +/- 0.09 1 SPW-1202 Water 4/13/2018 U-238 0.15 0.06 +/-0.13 SPW-1425 Water 4/20/2018 H-3 159 45 +/- 98 200 SPW-1453 Water 4/24/2018 H-3 155 43 +/- 77 200 SPW-1492 Water 4/26/2018 Ra-228 0.68 0.25 +/- 0.35 2 SPW-1517 Water 4/27/2018 H-3 150 54 +/- 75 200 SPW-1521 Water 4/27/2018 Tc-99 5.38 2.64 +/- 3.31 10 SPW-1572 Water 5/2/2018 Gr. Alpha 0.41 -0.23 +/- 0.26 2 SPW-1572 Water 5/2/2018 Gr. Beta 0.69 -0.28 +/- 0.47 4 SPW-1617 Water 5/3/2018 H-3 155 -113+/-68 200 SPW-1643 Water 5/4/2018 Sr-89 0.66 0.36 +/- 0.50 5 SPW-1643 Water 5/4/2018 Sr-90 0.57 -0.07 +/- 0.25 1

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

b l-131(G); iodine-131 as analyzed by gamma spectroscopy.

0 Activity reported is a net activity rE:sult.

A4-1

TABLE A-4. In-House "Blank" Samples Concentration a Lab Code Sample Date Analysisb Laboratory results (4.66cr) Acceptance Type LLD Activityc Criteria (4.66 cr)

SPW-1694 Water 5/8/2018 H-3 157 86 +/- 80 200 SPW-1779 Water 5/11/2018 H-3 156 11 +/- 74 200 SPW-1895 Water 5/17/2018 1-131 0.12 0.00 +/- 0.08 1 SPW-1896 Water 5/18/2018 H-3 155 46 +/- 75 200 SPW-1898 Water 5/18/2018 H-3 186 2 +/- 92 200 SPW-1993 Water 5/24/2018 H-3 158 103 +/- 79 200 SPW-2041 Water 5/31/2018 H-3 156 115 +/- 81 200 SPW-2185 Water 6/6/2018 H-3 150 29 +/- 74 200 SPW-2383 Water 6/6/2018 Ra-226 0.03 0.20 +/- 0.02 2 SPW-2264 Water 6/11/2018 Gr. Alpha 0.39 -0.02 +/- 0.27 2 SPW-2264 Water 6/11/2018 Gr. Beta 0.73 -0.35 +/- 0.50 4 SPW-2913 Water 6/19/2018 Ra-226 0.02 0.18 +/-0.02 2 SPW-2436 Water 6/27/2018 Sr-89 0.66 0.00 +/- 0.46 5 SPW-2436 Water 6/27/2018 Sr-90 0.61 -0.10 +/- 0.27 1 SPW-2447 Water 6/29/2018 H-3 160 -6 +/- 79 200 SPW-2545 Water 7/10/2018 H-3 154 20 +/- 74 200 SPW-2705 Water 7/16/2018 H-3 153 15 +/- 73 200 SPW-2771 Water 7/19/2018 H-3 156 -27 +/- 71 200 SPW-2810 Water 7/20/2018 Gr. Alpha 0.42 -0.09 +/- 0.29 2 SPW-2810 Water 7/20/2018 Gr. Beta 0.70 0.31 +/- 0.50 4 SPW-3688 Water 7/23/2018 Ra-226 0.02 0.21 +/- 0.02 2 SPW-3017 Water 7/31/2018 H-3 157 -5 +/- 74 200 SPW-3153 Water 8/6/2018 H-3 152 13 +/- 72 200 SPW-3377 Water 8/23/2018 Ni-63 66 18 +/-40 200 SPW-3446 Water 8/27/2018 H-3 151 -15 +/- 69 200 SPW-3476 Water 8/27/2018 Ra-228 0.77 0.05 +/- 0.36 2 SPW-3648 Water 9/7/2018 H-3 148 89 +/-75 200 SPW-4754 Water 9/7/2018 Ra-226 0.03 0.13 +/- 0.08 2 SPW-3842 Water 9/19/2018 H-3 156 29 +/-74 200 SPW-3990 Water 10/1/2018 H-3 153 -6 +/- 71 200 SPW-4105 Water 10/5/2018 H-3 150 7 +/- 71 200 SPW-4565 Water 10/11/2018 Ra-228 0.86 0 0.26 +/- 0.36 2 SPW-4205 Water 10/12/2018 H-3 154 -9 +/- 71 200 SPW-4273 Water 10/17/2018 H-3 153 67 +/-76 200 SPW-4595 Water 10/30/2018 H-3 150 75 +/-74 200 SPW-4681 Water 11/1/2018 H-3 152 19 +/- 72 200 SPW-4789 Water 11/9/2018 H-3 148 27 +/- 73 200 SPW-4862 Water 11/16/2018 H-3 154 15 +/- 77 200 SPW-5048 Water 11/30/2018 H-3 151 -6 +/- 69 200 a Liquid sample results are reported in pCi/Liter, air filters ( pCitm3>, charcoal (pCi/charcoal canister), and solid samples (pCi/g).

b l-131(G); iodine-131 as analyzed by gamma spectroscopy.

0 Activity reported is a net activity result.

A4-2

TABLE A-4. In-House "Blank" Samples Concentration a Lab Code Sample Date Analysisb Laboratory results {4.66crl Acceptance Type LLD Activity0 Criteria (4.66 cr)

SPW-4681 Water 11/1/2018 H-3 152 19 +/- 72 200 SPW-4683 Water 11/1/2018 Sr-89 0.64 0.25 +/- 0.45 5 SPW-4683 Water 11/1/2018 Sr-90 0.51 -0.10 +/- 0.22 1 SPW-4799 Water 11/9/2018 1-131 0.43 -0.01 +/- 0.20 1 SPW-4838 Water 11/13/2018 Ni-63 62 34 +/-38 200 SPW-5028 Water 11/19/2018 Ra-226 0.04 -0.14 +/- 0.03 2 SPW-5028 Water 11/19/2018 Ra-228 0.96 -0.11 +/-0.43 2 SPW-5147 Water 12/7/2018 H-3 151 14 +/- 71 200 SPW-5278 Water 12/14/2018 H-3 153 83 +/-76 200.

SPW-5350 Water 12/19/2018 H-3 153 71 +/-75 200 SPW-5403 Water 12/31/2018 H-3 156 51 +/- 75 200

• Liquid sample results are reported in pCi/Liter, air filters ( pCitm3>, charcoal (pCi/charcoal canister), and solid samples (pCi/g).

b l-131(G); iodine-131 as analyzed by gamma spectroscopy.

0 Activity reported is a net activity result.

A4-3

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged lab Code Date Analysis First Result Second Result Result Acceptance AP-010218 1/2/2018 Gr. Beta 0.048 +/- 0.004 0.057 +/- 0.004 0.052 +/- 0.003 Pass AP-010218 1/2/2018 Be-7 0.073 +/- 0.008 0.073 +/- 0.007 0.073 +/- 0.005 Pass

. AP-010318 1/3/2018 Gr. Beta 0.039 +/- 0.005 0.034 +/- 0.005 0.037 +/- 0.003 Pass AP-6846,6847 1/3/2018 Be-7 0.058 +/- 0.010 0.062 +/- 0.010 0.060 +/- 0.007 Pass AP-010318 1/3/2018 Be-7 0.059 +/- 0.009 0.059 +/- 0.007 0.059 +/- 0.006 Pass AP-010818 1/8/2018 Gr. Beta 0.053 +/- 0.007 0.055 +/- 0.007 0.054 +/- 0.005 Pass WW-164,165 1/11/2018 Gr. Beta 21.9 +/- 2.2 20.4 +/- 2.1 21.1 +/- 1.5 Pass WW-189,190 1/11/2018 H-3 501 +/- 100 498 +/- 100 499 +/- 71 Pass AP-011518 1/15/2018 Gr. Beta 0.032 +/- 0.005 0.033 +/- 0.005 0.032 +/- 0.003 Pass AP-012318 1/23/2018 Gr. Beta 0.031 +/- 0.005 0.032'+/- 0.005 0.031 +/- 0.003 Pass LW-280,281 1/25/2018 Gr. Beta 1.10 +/- 0.52 1.19 +/- 0.55 1.15 +/- 0.38 Pass AP-013018 1/30/2018 Gr. Beta 0.024 +/- 0.005 0.023 +/- 0.005 0.024 +/- 0.003 Pass SG-301,302 1/30/2018 Ac-228 3.01 +/- 0.49 3.11 +/-0.71 3.06 +/- 0.43 Pass SG-301,302 1/30/2018 Pb-214 2.47 +/- 0.31 2.22 +/- 0.35 2.34 +/- 0.23 Pass SG-301,302 1/30/2018 K-40 7.44 +/- 1.93 6.52 +/-2.25 6.98 +/- 1.48 Pass SWU-322,323 1/30/2018 Gr. Beta 1.48 +/- 1.10 3.06 +/- 1.31 2.27 +/- 0.85 Pass Pa391,392 2/2/2018 H-3 428 +/- 94 332 +/- 89 380 +/- 65 Pass S-433,434 2/7/2018 Pb-214 0.16 +/- 0.04 0.13 +/- 0.05 0.15 +/- 0.03 Pass S-433,434 2/7/2018 Ac-228 0.24 +/- 0.06 0.26 +/- 0.07 0.25 +/- 0.05 Pass S-433,434 2/7/2018 K-40 6.45 +/- 0.58 6.50 +/- 0.59 6.48 +/- 0.41 Pass AP-454,455 2/8/2018 Be-7 0.233 +/-0.102 0.271 +/-0.111 0.252 +/- 0.075 Pass AP-021218 .2/12/2018 Gr. Beta . 0.037 +/- 0.005 0.035 +/- 0:005 0.036 +/- 0.004 Pass CF-477,478 2/12/2018 . Be-7 0.31+/-0.17 0.21 +/- 0.08 0.26 +/- 0.09 Pass AP-021918 2/19/2018 Gr. Beta 0.036 +/- 0.005 0.033 +/- 0.008 0.035 +/- 0.005 Pass AP-022118 2/21/2018 Gr. Beta 0.030 +/- 0.003 0.025 +/- 0.003 0.028 +/- 0.002 Pass SWU-704,705 2/27/2018 Gr. Beta 2.50 +/- 0.65 1.72 +/- 0.58 2.11 +/- 0.44 Pass W-849,850 2/28/2018 H-3 567 +/- 105 730 +/- 112 649 +/- 77 Pass AP-030518 3/5/2018 Gr. Beta 0.024 +/- 0.005 0.025 +/- 0.005 0.024 +/- 0.004 Pass DW-90026,90027 3/7/2018 Gr. Alpha 55.4 +/- 2.5 60.3 +/- 2.6 57.8+/-1.8 Pass DW-90026,90027 3/7/2018 Gr. Beta 28.0 +/- 1.2 27.4 +/- 1.2 27.7 +/- 0.8 Pass S-800,801 3/8/2018 Ra-226 1.06 +/- 0.15 1.17 +/-0.17 1.12 +/- 0.11 Pass S-800,801 3/8/2018 Ra-228 1.08 +/- 0.19 1.05 +/- 0.20 1.07 +/- 0.14 Pass S-800,801 3/8/2018 K-40 15.5 +/- 1.3 15.7 +/- 1.4 15.6 +/- 0.9 Pass 0

SG-863,864 3/8/2018 Ra-226 5.56 +/- 0.28 5.92 +/- 0.27 5.74 +/- 0.19 Pass SG-863,864 3/8/2018 Ra-228 7.77 +/- 0.44 8.19 +/-0.53 7.98 +/- 0.34 Pass SG-863,864 3/8/2018 K-40 10.75 +/- 1.29 12.28 +/- 1.39 11.52 +/- 0.95 Pass WW-842,843 3/9/2018 H-3 415 +/- 99 423 +/- 99 419 +/- 70 Pass AP-030918 3/9/2018 Gr. Beta 0.027 +/- 0.004 0.021 +/- 0.004 0.024 +/- 0.003 Pass AP-031318 3/13/2018 Gr. Beta 0.030 +/- 0.004 0.031 +/- 0.004 0.031 +/- 0.003 Pass AP-031318 3/13/2018 Gr. Beta 0.026 +/- 0.005 0.024 +/- 0.005 0.025 +/- 0.00~ Pass WW-934,935 3/13/2018 H-3 266 +/- 95 294 +/- 96 280 +/- 68 Pass S-972,973 3/20/2018 K-40 23.1 +/- 3.3 19.8 +/- 2.5 21.4 +/- 2.1 Pass AS-1

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance AP-032018 3/20/2018 Gr. Beta 0.021 +/- 0.005 0.023 +/- 0.005 0.022 +/- 0.004 Pass WW-1016,1017 3/22/2018 H-3 716 +/- 110 790 +/- 113 753 +/- 79 Pass SW-995,996 3/26/2018 H-3 14,538 +/- 364 14,647 +/- 365 14,593 +/- 258 Pass WW-1900,1901 3/30/2018 H-3 863 +/- 123 865 +/- 123 864 +/- 87 Pass AP-1299,1300 4/3/2018 Be-7 0.075 +/- 0.017 0.073 +/- 0.014 0.074 +/- 0.011 Pass SG-1470, 1471 4/3/2018 Pb-214 1.45 +/-0.14 1.39 +/-0.12 1.42 +/- 0.09 Pass SG-1470,1471 4/3/2018 Ac-228 2.39 +/- 0.31 2.55 +/- 0.31 2.47 +/- 0.22 Pass WW-1123,1124 4/5/2018 H-3 11,266 +/- 319 11,175 +/-320 11,220 +/- 226 Pass DW-90035,90036 4/6/2018 Ra-226 1.04 +/- 0.13 0.88 +/- 0.14 0.96 +/- 0.10 Pass DW-90035,90036 4/6/2018 Ra-228 0.84 +/-0.13 1.08 +/- 0.42 0.96 +/- 0.22 Pass AP-041018 4/10/2018 Gr. Beta 0.023 +/- 0.004 0.019 +/- 0.004 0.021 +/- 0.003 Pass SS-1611,1612 4/18/2018 K-40 10.01 +/- 0.54 8.93 +/- 0.56 9.47 +/- 0.39 Pass SW-1427,1428 4/18/2018 H-3 180 +/- 84 114 +/- 81 147 +/- 58 Pass WW-1494,1495 4/20/2018 H-3 326 +/- 84 270 +/- 89 298 +/- 61 Pass AP-042518 4/25/2018 Gr. Beta 0.028 +/- 0.004 0.023 +/- 0.004 0.026 +/- 0.003 Pass 80-1634, 1635 4/25/2018 K-40 5.72 +/- 0.51 6.36 +/- 0.56 6.04 +/- 0.38 Pass BS-1546,1547 4/26/2018 K-40 8.35 +/- 0.53 8.54 +/- 0.57 8.44 +/- 0.39 Pass AP-042618 4/26/2018 Gr. Beta 0.023 +/- 0.004 0.021 +/- 0.004 0.022 +/- 0.003 Pass DW-90043,90044 4/27/2018 Gr. Alpha 11.9 +/- 1.1 11.3 +/- 1.1 11.6 +/- 0.8 Pass AP-050118 5/1/2018 Gr. Beta 0.020 +/- 0.006 0.022 +/- 0.006 0.021 +/- 0.004 Pass AP-050218 5/2/2018 Gr. Beta 0.020 +/- 0.002 0.019 +/- 0.002 0.020 +/- 0.002 Pass F-2333,2334 5/2/2018 Cs-137 2.53 +/- 0.34 2.51 +/- 0.32 2.52 +/- 0.24 Pass

\DW-90048,90049 5/2/2018 Ra-226 0.18+/-0.11 0.14 +/- 0.08 0.16 +/- 0.07 Pass DW-90048,90049 5/2/2018 Ra-228 0.86 +/- 0.60 0.78 +/- 0.60 0.82 +/- 0.42 Pass WW-1833,1834 5/8/2018 H-3 182 +/- 83 304 +/- 98 243 +/- 64 Pass SG-1747,1748 5/8/2018 Pb-214 13.0 +/- 0.6 13.0 +/- 0.6 13.0 +/- 0.4 Pass SG-1747,1748 5/8/2018 Ac-228 21.0 +/- 1.2 21.1 +/- 1.4 21.0 +/- 0.9 Pass J Pass AP-050818 5/8/2018 Gr. Beta 0.027 +/- 0.005 0.025 +/- 0.004 0.026 +/- 0.003 F-1812, 1813 5/9/2018 K-40 4.30 +/- 0.47 3.40 +/- 0.47 3.85 +/- 0.33 Pass SG-1767,1768 5/9/2018. Pb-214 0.96 +/- 0.24 0.72 +/- 0.24 0.84 +/- 0.17 Pass SG-1767, 1768 5/9/2018 Ac-228 1.28 +/- 0.34 1.15 +/- 0.37 1.22 +/- 0.25 Pass AP-051418 5/14/2018 Gr. Beta 0.038 +/- 0.006 0.033 +/- 0.005 0.036 +/- 0.004 Pass DW-90061,90062 5/17/2018 Ra-226 1.53+/-0.13 1.78+/-0.15 1.66 +/- 0.10 Pass DW-90061,90062 5/17/2018 Ra-228 0.82 +/- 0.45 0.87 +/- 0.44 0.85 +/- 0.31 Pass F-2201,2202 5/18/2018 K-40 2.73 +/- 0.40 2.68 +/- 0.45 2.71 +/- 0.30 Pass AP-051818 5/18/2018 Gr. Beta 0.020 +/- 0.004 0.026 +/- 0.004 0.023 +/- 0.003 Pass WW-2050,2051 5/22/2018 H-3 28,404 +/- 502 28,666 +/- 504 28,535 +/- 356 Pass AP-052218 5/22/2018 Gr. Beta 0.024 +/- 0.004 0.021 +/- 0.004 0.023 +/- 0.003 Pass AP-052918 5/29/2018 Gr. Beta 0.028 +/- 0.004 0.024 +/- 0.004 0.026 +/- 0.003 Pass AP-052918 5/29/2018 Gr. Beta 0.023 +/- 0.005 0.025 +/- 0.005 0.024 +/- 0.003 Pass AS-2

TABLE A-5. In-House "Duplicate" Samples Concentration a Averaged Lab Code Date Analysis First Result Second Result Result Acceptance G-2133,2134 6/4/2018 Be-7 0.55 +/- 0.64 0.32 +/-0.16 0.43 +/- 0.33 Pass G-2133,2134 6/4/2018 K-40 7.12 +/- 0.64 6.53 +/- 0.58 6.82 +/- 0.43 Pass WW-2270,2271 6/8/2018 H-3 90 +/- 84 71 +/- 83 80 +/-59 Pass VE-2312,2313 6/11/2018 K-40 6.06 +/-0.17 5.50 +/- 0.46 5.78 +/- 0.24 Pass AP-2375,2376 6/14/2018 Be-7 0.310 +/-0.134 0.240 +/-0.100 0.275 +/- 0.084 Pass AP-2893,2894 6/27/2018 Be-7 0.111 +/- 0.016 0.111 +/- 0.016 0.111 +/- 0.011 Pass SG-24511,2512 7/2/2018 Gr. Alpha 19.60 +/- 3.08 19.55 +/- 3.06 19.58 +/-2.17 Pass SG-2469,2470 7/2/2018 Pb-214 9.16 +/- 0.48 9.46 +/- 0.37 9.31 +/- 0.30 Pass SG-2469,2470 7/2/2018 Ac-228 9.94 +/- 0.87 10.00 +/- 0.64 9.97 +/- 0.54 Pass SG-2511,2512 7/2/2018 Pb-214 4.46 +/- 0.31 4,57 +/- 0.34 4.52 +/- 0.23 Pass SG-2511,2512 7/2/2018 Ac-228 6.15 +/- 0.57 5.83 +/- 0.66 5.99 +/- 0.44 Pass VE-2610,2611 7/9/2018 K-40 6.52 +/- 0.75 5.92 +/- 0.75 6.22 +/- 0.53 Pass F-2851,2852 7/11/2018 K-40 2.93 +/- 0.38 2.83 +/- 0.32 2.88 +/- 0.25 Pass AP-071218 7/12/2018 Gr. Beta 0.021 +/- 0.003 0.024 +/- 0.004 0.023 +/- 0.002 Pass AP-2721,2722 7/12/2018 Be-7 0.204 +/- 0.100 0.275 +/- 0.127 0.240 +/- 0.081 Pass WW-2742,2743 7/12/2018 H-3 253 +/- 86 278 +/- 97 265 +/- 65 Pass DW-90123,90124 7/24/2018 Ra-226 0.97 +/-'0.18 1.06 +/-0.12 1.02 +/- 0.11 Pass DW-90123,90124 7/24/2018 Ra-228 3.61 +/- 0.74 4.05 +/- 0.80 3.83 +/- 0.54 Pass G-3000,3001 7/24/2018 Be-7 3.29 +/- 0.25 3.24 +/- 0.26 3.26 +/- 0.18 Pass G-3000,3001 7/24/2018 K-40 4.98 +/- 0.40 5.06 +/-0.41 5.02 +/- 0.29 -Pass*

S-2916,2917 7/24/2018 Pb-214 1.00 +/- 0.51 0.94 +/- 0.53 0.97 +/- 0.37 Pass S-2916,2917 7/24/2018 Ac-228 0.98 +/- 0.11 0.98 +/- 0.09 0.98 +/- 0.07 Pass AP-073018 7/30/2018 Gr. Beta 0.029 +/- 0.004 0.022 +/- 0.004 0.026 +/- 0.003 Pass DW-90133,90134 8/7/2018 Ra-228 2.34 +/- 0.68 3.28 +/- 0.73 2.81 +/- 0.50 Pass DW-90138,90139 8/10/2018 Gr. Alpha 4.02 +/- 0.68 3.87 +/- 0.66 3.95 +/- 0.51 Pass VE-3281,3282 8/14/2018 K-40 11.40 +/- 0.831 11.39 +/- 0.524 11.39 +/- 0.491 Pass VE-3323,3324 8/14/2018 K-40 3.41 +/- 0.227 3.67 +/- 0.262 3.54 +/- 0.173 Pass VE-3323,3324 8/14/2018 Be-7 0.25 +/- 0.069 0.33 +/- 0.092 0.29 +/- 0.058 Pass AP-081518 8/15/2018 Gr. Beta 0.022 +/- 0.003 0.028 +/- 0.003 0.025 +/- 0.002 Pass PM-3365,3366 8/16/2018 K-40. 14.77 +/- 0.76 14.19 +/- 0.69 14.48 +/- 0.51 Pass S-3478,3479 8/27/2018 Pb-214 0.70 +/- 0.05 0.70 +/- 0.05 0.70 +/- 0.04 Pass S-3478,3479 . 8/27/2018 Ac-228 0.84 +/- 0.11 0.89 +/- 0.08 0.87 +/- 0.07 Pass SWT-3501,3502 8/27/2018 Gr. Beta 0.64 +/- 0.48 1.42 +/- 0.56 1.03 +/- 0.37 Pass VE-3522,3523 8/28/2018 K-40 2.51 +/- 0.20 2.63 +/- 0.20 2.57 +/- 0.14 Pass WW-3745,3746 8/31/2018 H-3 1035 +/- 119 1056 +/- 99 1045 +/- 77 Pass S-3542,3543 8/30/2018 K-40 6.10 +/- 0.72 5.69 +/- 0.63 5.90 +/- 0.48 Pass W-3703,3704 9/11/2018 Gr. Alpha 0.71 +/- 0.80 1.03 +/- 0.81 0.87 +/- 0.57 Pass W-3703,3704 9/11/2018 Gr. Beta 1.67 +/- 1.08 0.53 +/- 1.00 1.10 +/- 0.74 Pass SG-3796,3797 9/14/2018 Gr. Alpha 42.3 +/- 3.6 50.9 +/- 3.8 46.6 +/- 2.6 Pass AS-3

TABLE A-5. In-House "Duplicate" Samples Concentration

• Averaged Lab Code Date Analysis First Result Second Result Result Acceptance SG~3796,3797 9/14/2018 Gr. Beta 43.9+/-1.9 44.1 +/- 1.8 44.0 +/- 1.3 Pass SG-3796,3797 9/14/2018 Pb-214 10.4 +/- 0.6 14.2 +/- 0.5 12.3 +/- 0.4 Pass SG-3796,3797 9/14/2018 Ac-228 15.8 +/- 1.2 15.7 +/- 1.2 15.8 +/- 0.8 Pass DW-90173,90174 10/24/2018 Ra-226 1.13+/-0.15 1.38 +/- 0.17 1.26 +/- 0.11 Pass DW-90173,9017f 10/24/2018 Ra-228 5.09 +/- 0.84 6.59 +/- 0.89 5.84 +/- 0.61 Pass SW-4782,4783 - 11/7/2018 H-3 192 +/- 82 238 +/- 84 215 +/- 59 Pass WW-4959,4960 11/13/2018 H-3 330 +/- 88 286 +/- 86 308 +/- 61 Pass SG-4850,4851 11/14/2018 Pb-214 15.0 +/- 0.4 14.7 +/- 0.4 14.9 +/- 0.3 Pass SG-4850,4851 11/14/2018 Ac-228 17.5 +/- 0.7 16.7 +/- 0.6 17.1 +/- 0.5 Pass VE-4917,4918 11/20/2018 K 4.54 +/- 0.45 4.05 +/- 0.46 4.30 +/- 0.32 Pass VE-4917,4918 11/20/2018 Be-7 9.42 +/- 0.45 9.42 +/- 0.46 9.42 +/- 0.32 Pass SG-5046,5047 11/21/2018 K-40 8.65 +/- 1.18 9.12 +/- 1.02 8.88 +/- 0.32 Pass SG-5046,5047 11/21/2018 Cs-137 0.18 +/-0.06 0.10 +/- 0.05 0.14 +/-0.78 Pass SG-5046,5047 11/21/2018 Gr. Alpha 22.8 +/- 5.6 17.5 +/- 4.8 20.2 +/- 0.0 Pass SG-5046,504 7 11/21/2018 Gr. Beta 31.8 +/- 3.5 26.8 +/- 3.1 29.3 +/- 3.7 Pass SG-6286,6287 12/1/2018

• Pb-214 11.3 +/- 0.4 10.7 +/- 0.5 11.0 +/- 0.3 Pass SG-6286,6287 12/1/2018 Ac-228 13.5 +/- 0.9 13.2 +/- 1.0 13.4 +/- 0.7 Pass SWU-5132,5133 12/4/2018 H-3 159 +/- 82 204 +/- 80 181 +/- 57 Pass SWU-5132,5133 12/4/2018 Gr. Beta 1.32 +/- 0.56 1.33 +/- 0.57 1.32. +/- 0.40 Pass XAP-5499,5500 1/2/2019 Fe-55 941 +/- 220 1027 +/- 226 984 +/- 158 Pass XAP-5499,5500 1/2/2019 Sr-89 20.2 +/- 7.3 14.9 +/- 5.7 17.5 +/- 4.7 Pass XAP-5499,5500 1/2/2019 Ni-63 12.1 +/- 8.5 15.6 +/- 8.5 13.8 +/- 6.0 Pass Note: Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

• 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).

AS-4

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

Concentration a Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance 0

MAS0-765 2/1/2018 Am-241 1.57 +/- 4.46 0 NA Pass MAS0-765 2/1/2018 Cs-137 4.69 +/-2.59 4.6 NA ct Pass MAS0-765 2/1/2018 Co-57 886 +/- 7 826 578 -1074 Pass MAS0-765 2/1/2018 Co-60 579 +/- 7 560 392 - 728

• Pass MAS0-765 2/1/2018 Mn-54 1135 +/- 15 1010 707 - 1313 Pass MAS0-765 2/1/2018 K-40 653 +/-47 577 404 - 750 Pass MAS0-765 2/1/2018 Zn-65 1096 +/- 19 960 672 -1248 Pass MAS0-765 2/1/2018 Pu-238 54.4 +/- 5.6 45.2 31.6 - 5.8.8 Pass MAS0-765 *21112018 Pu-239/240 58.9 +/-5.6 50.8 35.6 - 66.0 Pass MAS0-765 2/1/2018 Sr-90 1.07 +/- 1.15 0 NAC Pass MAAP-769 2/1/2018 Am-241 0.070 +/- 0.021 0.067 0.047 - 0.087 . Pass MAAP-769 2/1/2018 Cs-134 0.55 +/- 0.04 0.675 0.473 - Q.878 Pass MAAP-769 2/1/2018 Cs-137 0.01 +/- 0.01 0 NA C Pass MAAP-769 2/1/2018 Co-57 1.06 +/- 0.04 1.18 0.83 - 1.53 Pass MAAP-769 2/1/2018 Co-60

• 0.01 +/- 0.01 0 NA C Pass MAAP-769 2/1/2018 Mn-54 1.01 +/- 0.05 1.03 0.72 -1.34 Pass MAAP-769 2/1/2018 Zn-65

• 1.37 +/- 0.11 1.33 0.93 -1.73 Pass MAAP-769 2/1/2018 Pu-238 0.042 +/- 0.017 0.0445 0.0312 - 0.0579 Pass 0

MAAP-769 2/1/2018 Pu-239/240 -0.001 +/- 0.006 0 NA Pass MAAP-769 2/1/2018 Sr-90 1.12 +/- 0.13 1.01 0.71 - 1.31 Pass MAAP-769 2/1/2018 U-234/233 0.117 +/-0.023 0.124 0.087-0.161 Pass MAAP-769 . 2/1/2018 *,U-238 0.126 +/- 0.023 0.128 0.090 - 0.166 Pass MAVE-767 2/1/2018 Cs-134 3.03 +/- 0.10 3.23 2.26 -4.20 Pass MAVE-767 2/1/2018 Cs-137 3.86 +/- 0.05 3.67 2.57 - 4.77 Pass MAVE-767 2/1/2018 Co-57 4.86 +/-0.09 4.42 3.09 - 5.75 Pass MAVE-767 2/1/2018 Co-60 2.24 +/- 0.06 2.29 1:60 - 2.98 Pass MAVE-767 2/1/2018 Mn-54 2.75 +/- 0.08 2.66 1.86 - 3.46

• Pass MAVE-767 2/1/2018 Zn-65 0.02 +/-0.05 0 NA 0 Pass MAW-656 2/1/2018 1-129 1.66 +/- 0.07 1.93 1.35 - 2.51 Pass MAW-662 2/1/2018 Am-241 0.581 +/- 0.050 0.709 0.496 - 0.922 Pass MAW-662 2/1/2018 Cs-134 9.35 +/-0.38 10.2 7.1-13.3 Pass MAW-662 2/1/2018 Cs-137 13.0 +/- 0.2 12.2 8.5 - 15.9 Pass 0

MAW-662 2/1/2018 Co-57 0.003 +/- 0.039 0 NA Pass MAW-662 2/1/2018 Co-60 11.73 +/- 0.19 11.5 8.1 - 15.0 Pass MAW-662 2/1/2018 Mn-54 0.060 +/- 0.019 0 NAC Pass MAW-662 2/1/2018 Zn-65 15.85 +/- 0.27 14.3 10.0 - 18.6 Pass MAW-662 2/1/2018 Fe-55 10.7 +/- 11.7 11.1 7.80 - 14.40 Pass MAW-662 2/1/2018 Ni-63° 11.0 +/- 1.4 14.0 9.8 - 18.2 Warning MAW-662 2/1/2018 Ni-63° 12.9 +/- 1.7 14.0 9.8 - 18.2 I Pass 0

MAW-662 2/1/2018 H-3 -0.3 +/- 3.0 0 NA Pass MAW-662 2/1/2018 Pu-238 0.02 +/- 0.01 0.023 NA ct Pass MAW-662 2/1/2018 Pu-239/240 0.585 +/- 0.056 0.600 0.420 - 0.780 Pass 1

MAW-662 2/1/2018 Ra-226 0.340 +/- 0.040 0.257 0.180 - 0.334 Fail MAW-662 2/1/2018 Ra-2261 0.297 +/- 0.048 0.257 0.180 - 0.334 Pass A6-1

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

Concentration a Reference

• Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAW-662 2/1/2018 Sr-90 9.92 +/- 0.75 11.4 8.0 -14.8 Pass MAW-662 2/1/2018 . Tc-99 4.9 +/- 0.4 4.37 3.06 - 5.68 Pass

.MAW-662 2/1/2018 U-233/234 0.404 +/- 0.041 0.430 0.301 - 0.559 Pi!SS MAW-662 2/1/2018 U-238 0.396 +/- 0.041 0.437 0.306 - 0.568 Pass MAS0-3638 8/1/2018 Cs-134 688.7 +/- 26.2 781 547 - 1015 Pass MAS0-3638 8/1/2018 Cs-137 605.9 +/-22.7 572 400 - 744 Pass MAS0-3638 8/1/2018 Co-57 976.7 +/- 37.6 958 671 - 1245 Pass MAS0-3638 8/1/2018 Co-60 604.5 +/- 24.9 608 426 - 790 Pass 0

MAS0-3638 8/1/2018 Mn°54 5.2 +/- 5.2 0 NA Pass MAS0-3638 8/1/2018 K-40 630 +/- 31 566 396 - 736 Pass MAS0-3638 8/,1/2018 Zn-65 556.4 +/- 26.8 500 350 - 650 Pass MAAP-3636 8/1/2018 Cs-134 0.37 +/- 0.04 0.444 0.311 - 0.577 Pass MAAP-3636 8/1/2018 Cs-137 0.34 +/- 0.05 0.345 0.242 - 0.449 Pass MAAP-3636 8/1/2018 Co-57 0.56 +/- 0.04 0.592 0.414 - 0.770 Pass MAAP-3636 8/1/2018 Co-60 0.28 +/- 0.03 0.294 0.~06 - 0.382 Pass MAAP-3636 8/1/2018 Mn-54 0.26 +/- 0.05 0.266 0.186 -0.346 Pass MAAP-3636 8/1/2018 Zn-65 0.22 +/- 0.07 0.201 NA d Pass MAVE-3640 8/1/2018 Cs-134 1.87 +/-0.10 1.94 1.36 -2.52 Pass MAVE-3640 8/1/2018 Cs-137 2:69 +/- 0.15 2.36 1.65 -3.07 Pass MAVE-3640 8/1/2018 Co-57 3.90 +/- 0.1? 3.31 2.32 -4.30 Pass MAVE-3640 8/1/2018 Co~60 1.76 +/- 0.09 1.68 1.18 - 2.18 Pass MAVE-3640 8/1/2018 Mn-54 2.91 +/- 0.16 2.53 1.77 - 3.29 Pass MAVE-3640 8/1/2018 Zn-65 1.53 +/- 0.21 1.37 0.96 -1.78 Pass MAW-3480 8/1/2018 H-3 336.0 +/- 10.7 338 237 -439 Pass MAW-3480 8/1/2018 Cs-134 7.86 +/- 0.31 8.7 6.1 - 11.3 Pass MAW-3480 8/1/2018 Cs-137 7.55 +/-0.33 6.9 4.8 - 9.0 Pa*ss MAW-3480 8/1/2018 Co-57 15.67 +/- 0.36 14.9 10.4 - 19.4 Pass MAW-3480 8/1/2018 Co-60* 0.12 +/- 0.12 0 NA C Pass MAW-3480 8/1/2018 Mn-54 13.38 +/- 0.44 12.5 8.8 - 16.3 Pass MAW-3480 8/1/2018 Zn-65 7.80 +/- 0.53 7.53 5.27 - 9.79 Pass MAW-3634 8/1/2018 1-129 1.32 +/- 0.08 1.62 1.13 -2.11 Pass a Results are repor:ted in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

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

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

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

• The lab was in the "warning zone" on this study(biased low). The sample was rerun .applying an aggressive oxidation technique to remove a complexing agent that is utilized in the early steps of the procedure. Reanalysis was acceptable with this enhanced technique.

f'An investigation was performed to determine reason for the failure of the* Ra-226 result. A backup solution was reanalyzed with acceptable results. The current study as well as a past study were reanalyzed with acceptable results.

No conclusion has been currently drawn from the results of this investigation.

A6-2

8 TABLE A-7. lnterlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA)

• MRAD-28 Study Concentration a Lab Code b Date Analysis Laboratory ERA Control Result Result Limits c Acceptance ERAP-942\ 3/19/2018 Am-241d 24.6 7.86 5.61 -10.5 Fail ERAP-942 3/19/2018 Am-241d 7.30 7.86 5.61 -10.5 Pass ERAP-942 3/19/2018 Cs-134 174 204 132 - 250 Pass ERAP-942 3/19/2018 Cs-137. 969 865 710 -1130 Pass ERAP-942 3/19/2018 Co-60 672 665 565 - 845 Pass ERAP-942 3/19/2018 Fe-55 701 771 281 -1230 Pass ERAP-942 3/19/2018

• Mn-54 <50 <50.0 0.00 - 50.0 Pass ERAP-942

• 3/19/2018 Zn-65 594 668 548 - 1020 Pass ERAP-942 3/19/2018 Pu-238 56.8 55.6 42.0 - 68.3 Pass ERAP-942 3/19/2018 Pu-239 54.4 52.3 39.1 -63.1 Pass ERAP-942 3/19/2018 Sr-90 113 124 78.4 - 169 Pass ERAP-942 3/19/2018 U-234 22.8 24.6 18.2 - 28.8 Pass

.ERAP-942 3/19/2019 U-238 22.7 24.4 18.4 -29.1 Pass ERAP-944 3/19/2018 Gross Alpha 49.1 43.4 22.7 - 71.5 Pass ERAP-944 3/19/2018 Gross Beta 44.8 52.0 31.5 - 78.6 Pass ERS0-946 3/19/2018 Ac-228 1,480 1,240 818 - 1560 Pass ERS0~946 3/19/2018 Am-241 48 74.7 40.3 -106 Pass ERS0-946 3/19/2018 Bi-2128 1,980 1,240 355 -1,850 Fail ERS0-946 3/19/2018 Bi-2128 11,220 1,240 355 -1,850 Pass

.ERS0~946 - 3/19/2018 Bi-214 2,180

• 1,760 .* 845 - 2,620- Pass ERS0-946 3/19/2018 Cs-134 5,230 5,330 3,640 - 6,370 Pass ERS0-946 3/19/2018 Cs-137 4,820 4,210

• 3,180 - 5,320 Pass ERS0-946 3/19/2018 Co-60 8,390 8,060 6,350 - 9,950 Pass ERS0-946 3/19/2018 K-40 8 14,100 10,600 7,300 - 12,700 Fail ERS0-946 3/19/2018 K-40 8 12160 10,600 7,300 - 12,700 Pass ERS0-946 3/19/2018 Mn-54 < 1000 < 1000 0-1,000 Pass ERS0-946 3/19/2018 Pb-212 1,140 1,240 865 -1,570 Pass ERS0-946 3/19/2018 Pb-214 2330 1850 777 -2910 Pass ERS0-946 3/19/2018 Pu-238 1,830 1,470 733 ~ 2230 Pass ERS0-946 3/19/2018 Pu-239 1,520 1,330 725 -1910 Pass ERS0-946 3/19/2018 Sr-90 3,500 4,500 1,400 - 7,010 Pass ERS0-946 3/19/2018 Th-234 1,800 1,800 680 - 3,080 Pass-ERS0-946 3/19/2018 U-234 1,610 1,820 853 -2,380 Pass ERS0-946 3/19/2018 U-238 1,800 1,800 988 -2,420 Pass ERS0-946 3/19/2018 Zn-65 2,440 1,990 1,590 -2,710 Pass ERW-952 3/19/2018 Gr. Alpha 25.3 29.0 10.6 -40.0 Pass ERW-952 3/19/2018 Gr. Beta 61.3 73.1 36.6 *-101 Pass ERW-954 3/19/2018 H-3 22,300 21,700 16,400 - 26,400 Pass A7-1

TABLEA-7. lnterlaboratory Comparison Grosscheck Program, Environmental Resource Associates (ERA)a.

MRAD-28 Study Concentration a Lab Code b Date Analysis Laboratory ERA Control Result Result Limits*c Acceptance ERVE-948 3/19/2018 Am-241 3,800 3,880 2,400 - 5,480 Pass ERVE-948 3/19/2018 Cm-244 2,490 2,630 1,480 - 3,270 Pass ERVE-948 3/19/2018 Co-60 579 491 385 -642 Pass ERVE-948 3/19/2018 Cs-134 2,090 1,950 1,290 - 2,600 Pass ERVE-948 3/19/2018 Cs-137 2,640 2,160 1,660 -2,910 Pass ERVE-948 3/19/2018 K-40 34,000 30,900

• 23,200 - 39,100 Pass ERVE-948 3/19/2018 Mn-54 <"300 < 300 0~00 - 300 *pass ERVE-948 3/19/2018 Zn-65 3,080 2,400 1,790 - 3,560 Pass ERVE-948 3/19/2018 Pu-238 2,400 2,020 1,400 - 2,600 Pass ERVE-948 3/19/2018 Pu-239 5,140 4,160 2,880 - 5,270 Pass ERVE-948 3/19/2018 Sr-90 3,570 3,330 1,880 -4340 Pass ERVE-948 3/19/2018 U-233/234 4,130 4,050 2,850 -'5, 170 Pass ERVE-948 3/19/2018 U-238 4,190 4,010 2,830 - 5,020 Pass ERW-950 3/19/2018 Am-241 72.5 103 70.7 - 132 Pass ERW-950 3/19/2018 Co-60 1,550 1,480 1,280 -1,700 Pass ERW-950 3/19/2018 Cs-134 1,280 1,330 1,000 -1460 Pass ERW-950 3/19/2018 Cs-137 343 328 281 - 373 Pass ERW-950 3/19/2018 Mn-54 < 100 < 100 0.00 -100 Pass ERW-950 3/19/2018 Pu-238 59.8 66.1 39.7 - 85.6 Pass ERW-950 3/19/2018 Pu-239 84.8 91.8 56.8 -113 Pass ERW-950 3/19/2018 U-234 111 132 100-151 Pass ERW-950 3/19/2018 U-238 113 131 102 -154 Pass ERW-950 3/19/2018 Zn-65 1450 1300 1160 -1640 Pass ERW-950 3/19/2018 Fe-55 533 445 261 - 647 Pass ERW-950 3/19/2018 Sr-90 754 781 562 - 965 Pass a Results obtained by Environmental, Inc., Midwest Laboratory (EIML) as a participant in the crosscheck program for a

• proficiency testing administered-by Environmental Resource Associates, serving as replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory codes as follows: ERW (water), ERAP (air filter), ERSO (soil), ERVE (vegetation). Results are reported in units of pCi/L, except for air filters (pCi/Filter), vegetation and soil (pCi/kg).

• c Results are presented as the known values, expected laboratory precision (2 sigma, 1 determination) and control limits as provided by ERA.

d Reported result was higher than ERA's upper acceptance limit. An investigation was initiated. The sample was run with a pre-treatment technique. Rerunning the analysis with this pre-treatment gave a *result of 7.30 pCi/total.

Going forward all samples for Am-241 will be analyzed utilizing this pre-treatment.

e The ERA results for K-40 and Bi-212 were outside the acceptable limits. The sample analysis was rerun utilizing a different library with acceptable results. The gamma software vendor will be consulted for the differences between the two libraries. In the meantime EIML will occasionally be counting a standard with known activity to ensure reported values are within the laboratory's acceptance criteria.

A7-2

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

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2018 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 3

(pCi/m ) Gross Beta (318) 0.01 0.026 (265/265) 37 0.027 (53/53) 0.025 (53/53) 0 (0.006 - 0.059) 2.0 miles NNW (0.008 - 0.059) (0.007 - 0.053)

Gamma (24)

Be-7 0.082 (20/20) 37 0.087 (4/4) 0.077 (4/4) 0 (0.060 - 0.117) 2.0 miles NNW (0.066 - 0.110) (0.066 - 0.091)

Air Radioiodine Station 53 3

(pCi/m ) 1-131 (318) 0.07 - (0/265) N/A N/A - (0/53) 0 Direct Radiation Stations 39 & 53 Dosimeters (mR per std. Gamma Dose 18.3 (160/160) 50 21.2 (4/4) 18.5 (8/8) 0 90-day Qtr.) (168) (11.0.,... 22.9) 3.6 miles ENE (18.5 - 22.9) (15.4-21.1)

Surface Water JRR (pCi/1) Gamma (24) - (0/12) N/A N/A - (0/12) 0 Tritium (24) 3,000 11,941 (12/12) SP 11,941 (12/12) - (0/12) 0 (9,101-14,775) 3.2 miles SSE" (9,101-14,775)

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

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

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2018 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 Non routine (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 1-131 (24) 1 - (0/12) N/A N/A - (0/12) 0 (pCi/1)

Gross Beta (24) 4 3.0 (12/12) 10-DW 3.0 (12/12) 3.0 (12/12) 0 (2.5 -4.4) 26.1 miles SSE (2.5 - 4.4) (2.0 - 5.1)

Gamma (24) - (0/12) NIA N/A - (0/12) 0 Tritium (8) 2,000 252 (1/4) 10-DW 252 (1 /4) - (0/4) 0 26.1 miles SSE Shoreline Gamma (4) JRR Sediment (pCi/kg dry) K-40 6,828 (2/2) DC 6,828 (2/2) 9,297 (2/2) 0 (6,814 -6,843) 0.8 miles WNW (6,814 -6,843) * (8,707 - 9,887)

Cs-137 - (0/2) N/A N/A - (0/2) 0 Fish - Flesh Gamma (28) JRR (pCi/kg wet)

K-40 3,220 (14/14) CCL 3,220 (14/14) 3,278 (14/14) 0 (2,648 - 3,841) 0.6 miles E to (2,648 - 3,841) (2,600 - 3,963)

NNW Tritium (28) 7,474 (14/14) CCL 7,474 (14/14) - (0/14) 0 (5,045 - 9,791) 0.6 miles E to (5,045 - 9,791)

NNW Page B-3

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

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2018 ',

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 (27) D-2 Garden (pCi/kg wet) Be-7 720 (20/20) A-3 829 (2/2) 798 (7/7) 0 (137 - 1,409) 2.6 miles N (301 - 1,357) (227 - 1,287)

K-40 5,273 (20/20) Q-6 5,776 (4/4) 5,459 (7/7) 0 (3,505 - 6,959) 2.4 miles NW (5,087 - 6,901) (4,734 - 6,595)

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

K-40 8,426 (2/2) NR-D1 14,086 (1/1) 2,979 (1/1) 0 (2,766 -14,086) 8.9 miles S Bottom Gamma (18) JRR Sediment (pCi/kg dry)

K-40 11,226 (16/16) UHS 11,301 (10/10) 13,837 (2/2) 0 (9,106 -15,249) 0.6 miles E (9,106 - 15,249) (12,186 - 15,488)

Cs-137 74 (3/16) DC 90 (1/2) 96 (1/2) 0 (47 -90f 0.9 miles WNW Fe-55 (14) -(0/14) N/A N/A N/A 0 HTD Sr-90 (2) - (1/2) UHS 32.6 (1/2) N/A 0 0.6 miles E Page B-4

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

• RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Name of Facility: Wolf Creek Generating Station . Docket No.: 50-482 Location of Facility: Coffey County, Kansas Reporting Period: Annual 2018 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 Non routine (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-7 222 (2/3) DC 244 (1/1) 0 (200 -244) o:9 miles WNW K-40 2,309 (3/3) DC 2506 (1/1) 0 (2,175 - 2,506) 0.9 miles WNW Cs-137 - (0/4) N/A N/A 0 Terrestrial Gamma (2)

• No Control Vegetation (pCi/kg wet) Be-7 2,274 (2/2) MUDS 2,538 (1/1) 0 (2,011 - 2,538) 1.5 miles WNW K-40 6,012 (2/2) EEA 8,309 (1/1) 0 (3,715 - 8,309) 3.0 miles NNW Soil Gamma (1) No Control (pCi/kg dry)

K-40 11,760(1/1) EEA 11,760 (1/1) 0 3.0 miles NNW Cs-137 182(1/1) EEA 182 (1/1) 0 3.0 miles NNW Turkey Gamma (1) No Control (pCi/kg wet)

K-40 2,940 (1/1) A2.0 2,940 (1/1) 0 2.0 miles N Tritium (1) 612(1/1) A2.0 612(1/1) 0 2.0 miles N Page B~5

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

I

APPENDIXC INDIVIDUAL SAMPLE RESULTS 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

Air Particulate Filters and Radioiodine Canisters Location: 002 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Dec-17 03-Jan-18 291 0.035 +/- 0.005 < 0.012 03-Jan-18 08-Jan-18. 221 0.048 +/- 0.007 < 0.014

• 08-Jan-18 15-Jan-18 302 0.034 +/- 0.005 < 0.010 15-Jan-18 23-Jan-18 321 0.027 +/- 0.005 < 0.008 23-Jan-18 30-Jan-18 *302 0.021 +/- 0.004 < 0.013 30-Jan-18 05-Feb-18 255 0.023 +/- 0.005 < 0.010 05-Feb-18 12-Feb-18 308 0.032 +/- 0.005 < 0.011 12-Feb-18 19-Feb-18 292 0.028 +/- 0.005 < 0.007 19-Feb-18 27-Feb-18 359 0.018 +/- 0.004 < 0.005 27-Feb-18 05-Mar-18 257 0.018 +/- 0.005 < 0.010 05-Mar-18 13-Mar-18 353 0.033 +/- 0.004 < 0.016 13-Mar-18 20-Mar-18 290 0.021 +/- 0.005 < 0.009 20-Mar-18 26-Mar-18 255 0.021 +/- 0.005 < 0.027 26-Mar-18 02-Apr-18 308 0.023 +/- 0.004 < 0.011 02-Apr-18 . 10-Apr-18 340 0.022 +/- 0.004 < 0.008 10-Apr-18 18-Apr-18 333 0.025 +/- 0.004 < 0.013 18-Apr-18 26-Apr-18 341 0.020 +/- 0.004 < 0.010 26-Apr-18 01-May-18 219 0.017 +/- 0.006 < 0.011 01-May-18 08-May-18 305 0.029 +/- 0.005 < 0.016 08-'May-18 14-May-18 255 . 0.034 +/-. Q.005 *< 0.013 14-May-18 22-May-18 341 0.021 +/- 0.004 < 0.008 22-May-18 1 29-May-18 290 0.025 +/- 0.005 < 0.013 29-May-18 04-Jun-18 251 0.021 +/- 0.005 < 0.016 04-Jun-18 11-Jun-18 295 0.030. +/- 0.005 < 0.014 11-Jun-18 18-Jun-18 298 0.021 +/- 0.004 < 0.007 11-Jun-18 18-Jun-18 298 0.020 +/- 0.004 Duplicate 18-Jun~18 25-Jun-18 300 0.014 +/- 0.004 < 0.007 25-Jun-18 03-Jul-18 340 0.017 +/- 0.004 <* 0.010 03-Jul-18 10-Jul-18 299 0.029 +/- 0.005 < 0.009 10-Jul-18 17-Jul-18 298 0.026 +/- 0.005 < 0.013 17-Jul-18 25-Jul-18 342 0.032 +/- 0.004 < 0.013 25-Jul-18 30-Jul-18 215 0.025 +/- 0.006 < 0.014 30-Jul-18 06-Aug-18 296 0.034 +/- 0.005 < 0.007 06-Aug-18 13-Aug-18 298 0.029 +/- 0.005 < 0.013 13-Aug-18 21-Aug-18 350 0.022 +/- 0.004 < 0.009 21-Aug-18 . 27-Aug-18 258 0.039 +/- . 0.005 < 0.024

• 27-Aug-18 04-Sep-18 335 0.012 +/- 0.004 < 0.008

• 04-Sep-18 10-Sep-18 261 0.006 +/- 0.004 < 0.009 10-Sep-18 17-Sep~18 293 0.016 +/- 0.004 < 0.012 17-Sep-18 24-Sep-18 298 0.017 +/- 0.004 < 0.010 24-Sep-18 01-0ct-18 303 0.021 +/- 0.004 < 0.008 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -1

Air Particulate Filters and Radioiodine Canisters Location: 002 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 01-0ct-18 08-0ct-18. 298 0.014 +/- 0.004 < 0.013 08-0ct-18 15-0ct-18 307 0.010 +/- 0.004 < 0.016 15-0ct-18 22-0ct-18 293 0.020 +/- 0.004 < 0.021 22-0ct-18 29-0ct-18 292 0.028 +/- 0.005 < 0.016 22-0ct-18 29-0ct-18 292 0.030 1 +/- 0.005 Duplicate 29-0ct-18 05-Nov-18 298 0.020 +/- 0.004 < 0.017 05-Nov-18 1.2-Nov-18 306 0.018 +/- 0.004 < 0.011 12-Nov-18 19-Nov-18 298 0.029 . +/- 0.005 < 0.012 19-Nov-18 27-Nov-18 344 0.040 +/- 0.005 < 0.012 19-Nov-18 27-Nov-18 344 0.036 +/- 0.004 Duplicate 27-Nov-18 03-Dec-18 245 0.026 +/- 0.005 < 0.010 03-Dec-18 10-Dec-18 301 0.030 +/- 0.005 < 0.010 10-Dec-18 17-Dec-18 292 0.035 +/- 0.005 < 0.016 17-Dec-18 26-Dec-18 383 0.022 +/- 0.004 < 0.008 26-Dec-18 31-Dec-18 221 0.028 +/- 0.006 < 0.014.

2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -2

Air Particulate Filters and Radioiodine Canisters Location: 018 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Dec-17 03-Jan-18 300 0.041 +/- 0.005 < 0.012 03-Jan-18 08-Jan-18 219 0.050 +/- 0.007 < 0.014 08-Jan-18 15-Jan-18 312 0.030 +/- 0.005 < 0.009 15-Jan-18 23-Jan-18 335 0.031 +/- 0.005 < 0.008 23-Jan-18 30-Jan-18 301 0.026 +/- 0.004 < 0.013 30-Jan-18 05-Feb-18 258 0.022 +/- 0.005  :< 0.010 05-Feb-18 12-Feb-18 302 0.037 +/- 0.005 < 0.011 05-Feb-18 12-Feb-18 302 0.035 +/- 0.005 Duplicate 12-Feb-18 19-Feb-18 296 0.031 +/- 0.005 < 0.007 19-Feb-18 27-Feb-18 351 0.019 +/- 0.004 < 0.006 27-Feb-18 05-Mar-18 258 0.024 +/- 0.005 < 0.010 27-Feb-18 05-Mar-18 258 0.025 +/- 0.005 Duplicate 05-Mar-18 13-Mar-18 349 0.031 +/- 0.004 < 0.017 13-Mar-18 20-Mar-18 292 0.026 +/- 0.005 < 0.009 13-Mar-18 20-Mar-18 292 0.024 +/- 0.005 Duplicate 20-Mar-18 26-Mar-18 255 0.023 +/- 0.005 .< 0.027 26-Mar-18 02-Apr-18 310 0.025 +/- 0.004 < 0.011 02-Apr-18 10-Apr-18 342 0.021 +/- 0.004 < 0.007 1o*-Apr-18 18-Apr-18 336 0.023 +/- 0.004 < 0.013 18-Apr-18 26-Apr-18 342 0.026 +/~ 0.004 <' 0.010 26-Apr-'18 01-May-18 225 0.026 +/- 0.006 < 0.011 01-May-18 08-May-18 306 0.025 +/- 0.004 < 0.016 01-May-18 08-May-18 306 0.027 +/- 0.005 Duplicate.

08-May-18 14-May-18 254 0.036 +/- 0.005 < 0.013 14-May-18 22-May-18 343 0.021 +/- 0.004 < 0.008 22-May-18 29-May-18 295 0.024 +/- 0.005 < 0.012 29-May-18 04-Jun-18 255 0.021 +/- 0.005 < 0.016 04-Jun-18 11-Jun-18* 296 0.029 +/- 0.005 < 0.013 11-Jun-18 18-Jun-18 305 0.018 +/- 0.004 < 0.007 18-Jun-18 25-Jun-18 299 0.012 +/- 0.004 < 0.007 25-Jun-18 03-Jul-18 346 0.018 +/- 0.004 < 0.010 03-Jul-18 10-Jul-18 301 0.029 +/- 0.005 < 0.009 10-Jul-18 17-Jul-18 297 0.025 +/- 0.005 < 0.013 17-Jul-18 25-Jul-18 343 0.032 +/- 0.004 < 0.013 25-Jul-18 30-Jul-18 216 0.028 +/- 0.006 < 0.014 30-Jul-18 06-Aug-18 297 0.039 +/- 0.005 < 0.007 06-Aug-18 13-Aug-18 303 0.027 +!~ 0.005 < 0.013 13-Aug-18 21-Aug-18 352 0.021 +/- 0.004 < 0.009 21-Aug-18 27-Aug-18 259 0.040 +/- 0.005 < 0.024 27-Aug-18 04-Sep-18 331 0.016 +/- 0.004 < 0.008 04-Sep-18. 10-Sep-18 259 0.007 +/- 0.004 < 0.010 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -3

Air Particulate Filters and Radioiodine Canisters Location: 018 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate '1)3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 10-Sep-18 17-Sep-18 298 0.018 +/- 0.004 < 0.012 17-Sep-18 24-Sep-18 301 0.018 +/- 0.004 < 0.010 24-Sep-18 01-0ct-18 ' 305 0.023 +/- 0.004 < 0.008 01-0ct-18 08-0ct-18 300 0.010 +/- 0.004 < 0.013

• 08-0ct-18 15-0ct-18 308 0.007 +/- *0.004 < 0.016.

15-0ct-18 22-0ct-18 290 , 0.028 +/- 0.005 < ._0.021 15-0ct-18 22-0ct-18 290 0.027 +/- 0.005 Duplicate 2270ct-18 29-0ct-18 300 . 0.028 +/- 0.005 < 0.016 29-0ct-18 05-Nov-18 302 0.024 +/- 0.004 < 0.016 05-Nov-18 12-Nov-18 308 0.021 +/- 0.004 < 0.011 12-Nov-18 19-Nov-18 295 .0.027 +/- 0.005 < 0.012 19-Nov-18 27-Nov-18 346 0.032 +/- 0.004 < 0.012 27-Nov-18 03-Dec-18 256 0.026 +/- 0.005 < 0.010 03-Dec-18 10-Dec-18 305 0.029 +/- 0.005 < 0.010 10-Dec-18 17-Dec-18 291 0.038 +/- 0.005 < 0.016 17-Dec-18 26-Dec-18 390 0.018 +/- 0.003 < b.008 17-Dec-18 26-Dec-18 390 6.019 +/- 0.003 Duplicate 26-Dec-18 31-Dec-18 216 0.023 +/- 0.006 < 0.014 26-Dec-18 31-Dec-18 216 0.027 +/- 0.006 Duplicate 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

• Page C -.4

• Air Particulate Filters and Radioiodine Canisters Location: 032 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Dec-17 03-Jan-18 292 0.043 +/- 0.005 < 0.012*

03-Jan-18 08-Jan-18 223 0.054 +/- 0.007 < 0.014 08-Jan-18 15-Jan-18 309 0.031 +/- 0.005 < 0.009 15-Jan-18 23-Jan-18 329 0.032 +/- 0.005 < 0.008 23-Jan-18

• 30-Jan-18 302 0.025 +/- 0.004 < 0.013 30-Jan-18 05-Feb-18 256 0.030 +/- 0.005 < 0.010 30-Jan-18 05-Feb-18 256 0.03~ +/- 0.005 Duplicate 05-Feb-18 12-Feb-18 300 0.033 +/- 0.005 < 0.011

• 12-Feb-18 19-Feb-18 291 0.029 +/- 0.005 < 0.007 19-Feb-18 27-Feb-18 360 0.019 +/- 0.004 < 0.005 27-Feb-18 05-Mar-18 254 0.026 +/- 0.005 < 0.010 05-Mar-18 13-Mar-18 345 0.038 +/- 0.005 < 0.017 13-Mar-18 20-Mar-18 287 0.038 +/- 0.005 < 0.009 20-Mar-18 26-Mar-18 258 0.021 +1-* 0.005 < 0.027 20-Mar-18 26-Mar-18 258 0.023 +/- 0.005 Duplicate 26-Mar-18 02-Apr-18 308 0.024 +/- 0.004 < 0.011 02-Apr-18 10-Apr-18 342 0.019 +/~ 0.004 < 0.007 02-Apr-18 10-Apr-18 342 0.023 +(- 0.004 Duplicate 10-Apr-18 18-Apr-18 342 0.023 +/- 0.004 < 0.013 18-Apr-18 26-Apr-18 348 0.021 +/- 0.004 < 0.010 26-Apr-18 01-May-18 218 0.020 +/- 0.006 < 0.011 01-May~18 08-May-18 292 0.028 +/- 0.005 < 0.016 08-May-18 14-May-18 251 0.033 +/- 0.005 < 0.013 14,-May-18 22-May-18 336 0.021 +/- 0.004 < 0.008 22-May-18 29-May-18 296 0.025 +/- 0.005 < 0.012 22-May-18 29-May-18 296 0.023 +/- 0.005 Duplicate 29-May-18 04-Jun-18 254 0.020 +/- 0.005 < 0.016 29-May-18 04-Jun-18 254 0.021 +/- 0.005 Duplicate 04-Jun-18 11-Jun-18 296 0.028 +/- 0.005 < 0.013 11-Jun-18 18-Jun-18 299 0.022 +/- 0.004 .< 0.007 18-Jun-18 25-Jun-18 301 0.016 +/- 0.004 < 0.007 25-Jun-18 03-Jul-18 341 0.019 +/- 0.004 < 0.010 03-Jul-18 10-Jul-18 302 0.028 +/- 0.005 < 0.009 03-Jul-18 10-Jul-18 302 0.026 +/- 0.005 Duplicate 10-Jul-18 17-J.ul-18 300 0.030 +/- 0.005 < 0.013 17-Jul-18 25-Jul-18 342 +/- 0.004

' 0.030

< 0.013 25-Jul-18 30-Jul-18 213 0.022 +/- 0.006 < 0.014 30-Jul-18 06-Aug-18 289 0.034 +/- 0.005 < 0.007 06-Aug-18 13-Aug-18 293 0.029 +/- 0.005 < 0.014*

13-Aug-18 21-Aug-18 350 0.022 +/- 0.004 < 0.009 21-Aug-18 27-Aug-18 259 0.038 +/- 0.005 < 0.024 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 5

Air Particulate Filters and Radioiodine Canisters Location: 032 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Aug-18 04-Sep-18 340 0.017 +/- 0.004 < 0.008

• 27-Aug-18 04-Sep-18 340 0.013 +/- 0.003 Duplicate

. 04-Sep-18 10-Sep-18 258 0.006 +/- 0.004 < 0.010 10-Sep-18 17-Sep-18 299 0.021 +/- 0.004 < 0.012 10-Sep-18 17-Sep-18 299 0.020 +/- 0.004 Duplicate 17-Sep-18 24-Sep-18 302 0.018 +/- 0.004 < 0.010 17-Sep-18 24-Sep-18 302 0.019 +/- 0.004 Duplicate 24-Sep-18 01-0ct-18 304 0.024 +/- 0.004 < 0.008 24-Sep-18 01-0ct-18 304 0.020 +/- 0.004 Duplicate 01-0ct-18 08-Qct-18 I 300 0.013 +/- 0.004 < 0.013 08-0ct-18 15-0ct-18 306 0.008 +/- 0.004 < 0.016 15-0ct-18 22-0ct-18 296 0.023 +/- 0.004 < 0.020 22-0ct-18 29-0ct-18 298 0.028 +/- 0.005 < 0.016 29-0ct-18 05-Nov-18 301 0.023 +/- 0.004 < 0.016 05-Nov-18 12-Nov-18 307 0.023 +/- 0.004 < 0.011 12-Nov-18 19-Nov-18 296 0.031 +/- 0.005 < 0.012 12-Nov-18 19-Nov-18 296 0.032 +/-' 0.005 Duplicate 19-Nov-18 27-Nov-18 338 0.037 +/- 0.005 < 0.012 27-Nov-18 03-Dec-18 255 0.027 +/- .0.005 < 0.010 03-Dec-18 10-Dec-18 298 0.033 . +/- 0.005 < 0.010 10-Dec-18 17-Dec-18 300 0.036 +/- 0.005 < 0.015 17-Dec-18 26-Dec-18 383 0.019 +/- 0.003 < 0.008 26-Dec-18 31-Dec-18 218 0.029 +/- 0.006 < 0.014 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 6

Air Particulate Filters and Radioiodine Canisters Location: 037

• Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Dec-17 03-Jan-18 296 0.039 +/- 0.005 < 0.012 27-Dec-17 03-Jan-18 296 0.034 +/- 0.005 Duplicate.

03-Jan-18 08-Jan-18 223 0.059 +!- 0.007 < 0.014 08-Jan-18 15-Jan-18 311 0.034 +/- 0.005 < 0.009 15-Jan-18 23-Jan-18 327 0.033 +/- 0.005 < 0.008 23-Jan-18 30-Jan-18 299 0.026 +/- 0.005 < 0.013 30-Jan-18 05-Feb-18 257 0.029 +/- 0.005 < 0.010 05-Feb-18

• 12-Feb-18 306 0.034 +/- 0.005. < 0.011 12-Feb-18 19-Feb-18 289 0.036 +/- 0.005 < 0.007 12-Feb-18 19-Feb-18 289 0.033 +/- 0.005 Duplicate 19-Feb-18 27-Feb-18 355 0.020 +/- 0.004 < 0.006 27-Feb-18 05-Mar-18 259 0.026 +/-

• 0.005 < 0.010 05-Mar-18 13-Mar-18 354 0.033 +/- 0.004 < 0.016 13-Mar-18 20-Mar-18 285 0.024 +/- 0.005 < 0.009 20-Mar-18 26-Mar-18 258 0.025 +/- 0.005 < 0.027 26-Mar-18 02-Apr-18 306 0.023 +/- 0.004 < 0.011 02-Apr-18 1O-Apr-1.8 343 0.020 +/- 0.004 .< 0.007 1O-Apr-18 18-Apr-18 330 0.022 +/- 0.004 < 0.013 18-Apr-18 26-Apr-18 352 0.021 +I- 0.004 < 0.010 26-Apr-18 01-May-18 219 0.015 +/- 0.006 < 0.011 01-May-18 08-May-18 302 0.027 +/- 0.005 < 0.016 08-May-18 14-May-18 253 0.033 +/- 0.005 < 0.013 08-May-18 14-May-18 253 0.038 +/- 0.006 Duplicate 14-May-18 22-May-18 340 0.022 +/- 0.004 < 0.008 22-May-18 29-May-18 300 0.025 +/- 0.005 < 0.012 29-May-18. 04-Jun-18 '256

• 0.027 +/- 0.005 < 0.016 04-Jun-18 11-Jun-18 299 0.031 +/- 0.005 < 0.013 11-Jun-18 18-Jun-18 307 0.025 +/- 0.004 < 0.007 18-Jun-18 25-Jun-18 302 0.017 +/- 0.004 < 0.007 25-Jun-18 03-Jul-18 347 0.021 +/- 0.004 < 0.010 03-Jul-18 10-Jul-18 304 0.030 +/- 0.005 < 0.008 10-Jul-18 17-Jul-18 299 0.027 +/- 0.005 < 0.013 17-Jul-18 25-Jul-18 345 0.035 +/- 0.004 < . 0.013 25-Jul-18 30-Jul-18 215 0.028 +/- 0.006 < 0.014 30-Jul-18 06'-Aug-18 299 0.037 +/- 0.005 < 0.007 06-Aug-18 13-Aug-18 303 0.030 +/- 0.005 < 0.013 13-Aug-18

• 21-Aug-18 355 0.024 +/- 0.004 < 0.009 13-Aug-18 21-Aug-18 355 0.026 +/- 0.004 Duplicate 21-Aug-18 27-Aug-18 258 0.036. +/- 0.005 < 0.024 27-Aug-18 04-Sep-18 347 0.015 +/- 0.004 <

• 0.007 04-Sep-18 10-Sep-18 263 0.008 +/- 0.004 < 0.009 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -7

Air Particulate Filters*and Radioiodine Canisters Location: 037 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 10-Sep-18 17-Sep-18 300 0.020 +/- 0.004 < 0.012 17-Sep-18 24-Sep-18 307 0.020 +/- 0,004 < 0.010 24-Sep-18 01-0ct-18 305 0.019 +/- 0.004 < 0.008 01-0ct-18 08-0ct-18 299 0.012 +/- 0.004 < 0.013 01-0ct-18 08-0ct-18 299 0.016 +/- 0.004 Duplicate 08-0ct-18 15-0ct-18 311 0.009 +/- 0.004 < 0.016 15-0ct-18 22-0ct-18 291 0.022 +/- 0.004 < 0.021 22-0ct-18 29-0ct-18 301 0.026 +/- 0.004 <

• 0.016 29-0ct-18 05-Nov-18 303 0.028 +/- 0.004 < 0.016 05-Nov-18 12-Nov-18 316 0.023 +/- 0.004 < 0.011 12-Nov-18 19-Nov-18 306 0.032 +/- 0.005 < 0.012 19-Nov-18 27-Nov-18 349 0.037 +/- 0.004 < 0.012 27-Nov-18 03-Dec-18 259 0.026 +/- 0.005 < 0.010 03-Dec-18 . 10-Dec-18 312 0.032 +/- 0.005 < 0.009 10-Dec-18 17-Dec-18 298 0.041 +/- 0.005 < 0.016 17-Dec-18 26-Dec-18 384 0.022 +/- 0.004 < 0.008 26-Dec-18 31-Dec-18 219 0.026 +/- 0.006 < 0.014 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -8

Air Particulate Filters and Radioiodine Canisters Location: 049 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Dec-17 03-jan-18 294 0.037 +/- 0.005 < 0.012 03-Jan-18 08-Jan-18 222 0.053 +/- 0.007 < 0.014 03~Jan-18 08-Jan-18 222 0.055 +/- 0.007 Duplicate 08-Jan-18 15-Jan-18 309 0.037 +/- 0.005 < 0.009 15-Jan-18 23-Jan-18 332 0.031 +/- . 0.005 < 0.008 23-Jan-18 30-Jan-18 299 0.024 +/- 0.004 < 0.013 30-Jan~18 05-Feb-18 258 0.030 +/- 0.005 < 0.010 05-Feb-18 12-Feb-18 299 0.035 +/- 0.005 < 0.011 12-Feb-18 19-Feb-18 287 0.029 +/- 0.005 < 0.007 19-Feb-18 27-Feb-18 356 0.020 +/- 0.004 < 0.005 27-Feb-18 05-Mar-18 256 0.027 +/- 0.005 <* 0.010 05-Mar-18

• 13-Mar-18 352 0.036 +/- 0.004 < 0.016 13-Mar-18 20-Mar-18 289 0.023 +/- 0.005 <' 0.009 20-Mar-18 26-Mar-18 256 0.027 +/- 0.005 < 0.027.

26-Mar-18 02-Apr-18 311 0.025 +/- 0.004 < 0.010 02-Apr-'18 10-Apr-18 352 0.020 +/- 0.004 < 0.007 10-Apr-18 18-Apr-18 340 0.022 +/- 0.004 < 0.013 18-Apr-18 26-Apr-18 338 0.021 +/- 0.004 < 0.010 18-Apr-18 26-Apr-18 338 0.023 +/- 0.004 Duplicate 26-Apr-18 01-May-18 215 0.023 +/- 0.006 < 0.011 01-May-18 08-May-18 307 0.025 +/- 0.004 < 0.016 08-May-18 14-May-18 260 0.036 +/- 0.005 < 0.013 14-May-18 22-May-18 341 0.027 +/- 0.004 < 0.008 22-May-18 29-May-18 294 0.027 +/- 0.005 < 0.012 29-May-18 04-Jun-18 253 0.025 +/- 0.005 < 0.016 04-Jun-18 11-Jun~18

• 283 0.029 +/- 0.005 < 0.014 11-Jun-18 18-Jun-18 308 0.020 +/- 0.004 < 0.007 18-Jun-18 25-Jun-18 310 0.014 +/- 0.004 < 0.007 25-Jun-18 03-Jul-18 338 0.020 +/- 0.004 < 0.010 03-Jul-18 10-Jul-18 308 0.029 +/- 0.005 < 0.008 10-Jul-18 17-Jul-18 303 0.029 +/- 0.005 < 0.013 17-Jul-18 25-Jul-18 344 0.036 +/- 0.004 < 0.013 25-Jul-18 30-Jul-18 213 0.026 +I~ 0.006 < 0.014 30-Jul-18 06-Aug-18 299 0.039 +/- 0.005 < 0.007 30-Jul-1~ 06-Aug-18 299 0.037 +/- 0.005 Duplicate 06-Aug-18 13-Aug-18 298 0.029 +/- 0.005 < 0.013 13-Aug-18 21-Aug-18 349 0.022 +/- 0.004 < 0.009 21-Aug-18 27-Aug-18 261 0.036 +/- 0.005 < 0.024 21-Aug-18 27-Aug-18 261' 0.039 +/- 0.005 Duplicate 27-Aug-18 04-Sep-18 347 0.014 +/- 0.003 < 0.007 04-Sep-18 10-Sep-18 260 o*.009 +/- 0.004 < 0.009 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -9

Air Particulate Filters and Radioiodine Canisters Location: 049 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 10-Sep-18 17-Sep-18 300 0.022 +/- 0.004 < 0.012 17-Sep-18 24-Sep-18 312 0.017 +/- 0.004 < .0.010 24-Sep-18 01-0ct-18 303 0.027 +/- . 0.004 < 0.008 01-0ct-18 08-0ct-18 296 0.012 +/- 0.004 < 0.013 08-0ct-18 15-0ct-18 308 0.010 +/- 0.004 < 0.016 15-0ct-18 22-0ct-18 290 0.023 +/- 0.004 < 0.021 22-0ct-18 29-0ct-18 291 0.028 +/- . 0.005 < 0.017 29-0ct-18 05-Nov-18 305 0.026 +/- 0.004 < 0.016 05-Nov-18 12-Nov-18 311 0.027 +/- 0.004 < 0.011 12-Nov-18 19-Nov-18 311 0.031 +/- 0.005 < 0.011 19-Nov-18 27-Nov-18 341 0.036 +/- 0.005 < 0.012 27-Nov-18 03-Dec-18 260 0.025 +/- 0.005 < 0.010 03-Dec-18 10-Dec-18 309 0.030 +/- 0.005 < 0.010 10-Dec-18 17-Dec-18 295 0.039 +I- 0.005 < 0.016 17-Dec-18 26-Dec-18 386 0.020 +/- 0.003 < 0.008 26-Dec-18 31-Dec-18 223 0.028 +/- 0.006 < 0.014 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C: 10

Air Particulate Filters and Radioiodine Canisters Location: 053 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate

• EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 27-Dec-17 03-Jan-18 303 0.037 +/- 0.005 < 0.011 03-Jan-18 08-Jan-18 210 0.053 +/- 0.007 < 0.014 08-Jan-18 15-Jan-18 312 0.032 +/- 0.005 < 0.009 08-Jan-18 15-Jan-18 312 0.033 +/- 0.005 Duplicate 15-Jan-18 23-Jan-18 330 0.031 +/- 0.005 < 0.008 15-Jan-18 23-Jan-18 330 0.032 +/- 0.005 Duplicate 23-Jan-18 30-Jan-18 275 0.024 +/- 0.005 < 0.015 23-Jan-18 30-Jan-18 275 0.023 +/- 0.005 Duplicate 30-Jan-18 05-Feb-18 255 0.029 +/- 0.005 < 0.010 05-Feb-18 12-Feb-18 296 0.034 +/- 0.005 < 0.011 12-Feb-18 19-Feb-18 354 0.034 +/- 0.004 < 0.006 19-Feb-18 27-Feb-18 353 0.019 +/- 0.004 < 0.006 27-Feb-18 05-Mar-18 257 0.025 +/- 0.005 < 0.010 05-Mar-18 13-Mar-18 348 0.030 +/- 0.004 < 0.017 05-Mar-18 13-Mar-18 348 0.031 +/- 0.004 Duplicate 13-Mar-'18 20-Mar-18 289 0.020 +/- 0.005 < 0.009 20-Mar-18 26-Mar-18 255 0.024 +/- 0.005 < 0.027 26-Mar-18 02-Apr-18 307 0.021 +/- 0.004 < 0.011 26-Mar-18 02-Apr-18 307 0.023 +/- 0.004 Duplicate 02-Apr-18 10-Apr-18 351 0.018 +/- 0.004 < 0.007 1O-Apr-18. 18-Apr-18 337 0.026 +/- 0.004 < 0.013 18-Apr-18

• 26-Apr-18 341 0.023 +/- 0.004 < 0.010 26-Apr-18 01~May-18 218 0.022 +/- 0.006 < 0.011 26-Apr-18 01-May-18 218 0.020 +/- 0.006 Duplicate 01-May-18 08-May-18 304 0.029 +/- 0.005 < 0.016 08-May-18 14-May-18 252 0.033 +/- 0.005 < . 0.013 14-May-18 22-May-18 339 0.021 +/- 0.004 < 0.008 14-May-18 22-May-18 339 0.024 +/- 0.004 Duplicate 22-May-18 29-May-18 293 0.026 +/- 0.005 < 0.012 29-May-18 04-Jun-18 257 0.019 +!- 0.005* * < 0.016 04-Jun-18 11-Jun-18 296 0.025 +/- 0.005 < 0.013 11-Jun-18 18-Jun-18 301 0.022 +/- 0.004 < 0.007 18-Jun-18 25-Jun-18 296 0.016 +!- 0.004 < 0.007 25-Jun-18 03-Jul-18 341 0.020 +!- 0.004 < 0.010 03-Jul-18 1O-Jul-18 302 0.030 +/- 0.005 < 0.009 10-Jul-18 17-Jul-18 296 0.031 +!- 0.005 < 0.013 17-Jul-18 25-Jul-18 342 0.030 +!- 0.004 < 0.013 17-Jul-18 25-Jul-18 342 0.032 +/- 0.004 Duplicate 25-Jul-18 30-Jul-18 215 0.024 +!- 0.006 < 0.014 30-Jul-18 06-Aug-18 293 0.037 +!- 0.005 < 0.007 06-Aug-18 13-Aug-18 297 0.028 +/- 0.005 < 0.013 2018 Annual Radiological Environmental Operating Report*

Wolf Creek Generating Station Page C -11

Air Particulate Filters and Radioiodine Canisters Location: 053 Collection Collection Volume Gross Beta 1-131 Duplicate StartDate EndDate m3 Concentration Concentration Analysis (pCi/m3) (pCi/m3) 13-Aug-18 21-Aug-18 352 0.026 +/- 0.004 < 0.009 21-Aug-18 27-Aug-18 256 0.036 +/- 0.005 < 0.024 27-Aug-18 04-Sep-18 339 0.012 +/- 0.003 < 0.008 04-Sep-18 10-Sep-18 258 0.007 +/- 0.004 < 0.010 10-Sep-18 17-Sep-18 298 0.017 +/- 0.004 < 0.012 17-Sep-18 24-Sep-18 301 0.014 +/- 0.004 < 0.010 24-Sep-18 01-0ct-18 307 0.021 +/- 0.004 < 0.008 01-0ct-18 08-0ct-18 297 0.011 +/- 0.004 < 0.013 08-0ct-18 15-0ct-18 308 0.007 +/- 0.004 < 0.016 15-0ct-18 22-0ct-18 290 0.017 +/- 0.004 < 0.021 22-0ct-18 29-0ct-18 298 0.026 +/- 0.005 < 0.016 29-0ct-18 05-Nov-18 303 0.022 +/- 0.004 < 0.016 05-Nov-18 12-Nov-18 309 0.024 +/- 0.004 < 0.011 12-Nov-18 19-Nov-18 300 0.028 +/- 0.005 < 0.012 19-Nov-18 27-Nov-18 342 0.036 +/- 0.004 < 0.012 27-Nov-18 03-Dec-18 260 0.023 +/- 0.005 < 0.010 03-Dec-18 10-Dec-18 300 0.030 +/- 0.005 < 0.010 10-Dec.:.18 17-Dec-18 306 0.038 +/- 0.005 < 0.015 10-Dec-18 17-Dec-18 306 0.040 +/- 0.005 Duplicate 17-Dec-18 26-Dec-18 402 0.017 +/- 0.003 < 0.007 26-Dec-18 31-Dec-18 215 0.021 +/- 0.006 < 0.014 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -12

Quarterly Air Particulates - Gamma Location: 002 02-Apr-18 Nuclide Concentration (eCi/m3}

BE-7 0.072 +/- 0.012 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < , 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Jul-18 Nuclide Concentration (eCi/m3}

BE-7 0.106 +/:. 0.017 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-0ct-18 Nuclide Concentration (eCi/m3}

BE-7 0.071 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 31-Dec-18 Nuclide Concentration (eCi/m3}

BE-7 0.069 +/- 0.014 MN-54 < 0.001 C0-58 < 0:001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < 0.001

.ZR-NB-95 < .0.001 CS-134 < 0.001 CS-137 < 0.001

• Duplicate Analysis 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -13

Quarterly Air Particulates - Gamma Location: 018 02-Apr-18 Nuclide Concentration {eCi/m3}

BE-7 0.075 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Jul-18 Nuclide Concentration {eCi/m3}

BE-7 0.107 +/- 0.019

. MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-0ct-18 Nuclide Concentration {eCi/m3}

BE-7 0.061 +/- 0.013 MN.:.54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 31-Dec-18 Nuclide Concentration {eCi/m3}

BE-7 0.060 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE:.59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

• Duplicate Analysis 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station. Page C -14

Quarterly Air Particulates ~ Gamma Location: 032 02-Apr-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.070 +/- 0.015 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 *< 0.001 03-Jul-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.117 +/- 0.019 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.003 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-0ct-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.083 +/- 0.014 MN~54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 31-Dec-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.071 +/- 0.016 MN-54 ~ 0.001 C0~58 < 0:001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < . 0.002 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001

• Duplicate Analysis 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -15

Quarterly Air Particulates - Gamma Location: 037 02-Apr-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.087 +/- 0.015 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Jul-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.110 +/- 0.017 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0;001 CS-134 < 0.001 CS-137 < 0.001 01-0ct-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.085 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 31-Dec-18 Nuclide Concentration {E!Ci/m3}

BE-7 0.066 +/- 0.014 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 .< 0.001 CS-134 < 0.001 CS-137 < 0.001

• Duplicate Analysis _

2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -16

Quarterly Air Particulates - Gamma Location: 049 02-Apr-18 Nuclide Concentration (E!Ci/m3}

BE-7 0.081 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Jul-18 Nuclide Concentration (E!Ci/m3}

BE-7 0.093 +/- 0.017 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 01-0ct-18 Nuclide Concentration (E!Ci/m3)

BE-7 0.090 +/- 0.014 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 31-Dec-18 Nuclide Concentration (E!Ci/m3}

BE-7 0.065 +/- 0.012 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.001 C0-60 < 0.001 ZN-65 < . 0.001 ZR-NB-95 < O.Od1 CS-134 < 0.001 CS-137 .< 0.001

• Duplicate Analysis 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -17

. Quarterly Air Particulates - Gamma Location: 053 02-Apr-18 Nuclide Concentration (pCi/m3)

BE-7 0.072 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE-59 ,< 0.001 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 03-Jul-18 Nuclide Concentration (pCi/m3)

BE-7 0.091 +/- 0.017 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0;003 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001

-)

CS-137 < 0.001

I 01-0ct-18 Nuclide Concentration (pCi/m3)

BE-7 0.078 +/- 0.013 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.002 C0-60 < 0.001 ZN-65 < 0.001 ZR-NB-95 < 0.001 CS-134 < 0.001 CS-137 < 0.001 31-Dec-18 Nuclide Concentration (pCi/m3)

BE-7 0.066 +/- 0.018 MN-54 < 0.001 C0-58 < 0.001 FE-59 < 0.003 C0-60 < 0.001 ZN-65 < 0.004 ZR-NB-95 < 0.003 CS-134 < 0.001 CS-137 < 0.001

• Duplicate Analysis 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -18 L_

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Jan-18 SURFACE WATER MN-54 < 3.9 08-Jan-18 SURFACE WATER C0-58 < 4.0 08-Jan-18 SURFACE WATER FE-59 * < 7.0 08-Jan-18 SURFACE WATER C0-60 *< 2.5 08-Jan-18 SURFACE WATER ZN-65 < 2,8 08-Jan-18 SURFACE WATER ZR-NB-95 < 4.0 08-Jan-18 SURFACE WATER 1-131 < 8.5 08-Jan-18 SURFACE WATER CS-134 < 4.1 08-Jan-18 SURFACE WATER CS-137 < 4.2 08-Jan-18 SURFACE WATER BA-LA-140 < 3.3 08-Jan-18 SURFACE WATER H-3* < 154.0 05-Feb-18 SURFACE WATER MN-54 < 5.0 05-Feb-18 SURFACE WATER C0-58 < --2.1 05-Feb-18 SURFACE WATER FE-59 < 7.4 05-Feb-18 SURFACE WATER C0-60 < 2.8 05-Feb-18 SURFACE WATER ZN-65 < 4.4 05-Feb-18 SURFACE WATER ZR-NB-95 < 4.3 05-Feb-18 SURFACE WATER

• 1-131 < 5.8 05-Feb-18 SURFACE WATER CS-134 < 5.9 05-Feb-18 SURFACE WATER CS-137 < 5.1 05-Feb-18 SURFACE WATER BA-LA-140 < 3.1 05-Feb-18 SURFACE WATER H-3 < 156.0 05-Feb-18 SURFACE WATER FE-55 < 166.0 26-Mar-18 SURFACE WATER MN-54 < 2.3 26-Mar-18 SURFACE WATER C0-58 < 1.8 26-Mar-18 SURFACE WATER FE-59 < 3.4 26-Mar-18 SURFACE WATER C0-60 < 2.2 26-Mar-18 SURFACE WATER ZN-65 < 3.4 26-Mar-18 SURFACE WATER ZR-NB-95 < 3.2 26:-Mar-18 SURFACE WATER 1-131 < 4.9 26-Mar-18 SURFACE WATER CS-134 < 4.1 26-Mar-18 SURFACE WATER CS-137 < 2.4 26-Mar-18 SURFACE WATER BA-LA-140 < 2.8 26-Mar-18 SURFACE WATER H-3 < 163.0 10-Apr-18 SURFACE WATER MN-54 < 2.0 10-Apr-18 SURFACE WATER C0-58 < 2.3 10-Apr-18 SURFACE WATER FE-59 < 4.4 1O-Apr-18 SURFACE WATER C0-60 < 1.9 2018 Annual Radiological Environmental Operating Report Page C -19 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Apr-18 SURFACE WATER ZN-65 < 4.0 10-Apr-18 SURFACE WATER ZR-NB-95 < 3.3 10-Apr-18 SURFACE WATER 1-131 < 4.2 10-Apr:-18 SURFACE WATER CS-134 < 3.0 10-Apr-18 SURFACE WATER CS-137 < 2.5 10-Apr-18 SURFACE WATER BA-LA-140 < 2.0 10-Apr-18 SURFACE WATER H-3 < 154.0 01-May-18. SURFACE WATER MN-54 < 2.5 01-May-18 SURFACE WATER C0-58. < 2.7

• 01-May-18 SURFACE WATER FE-59 < 6.7 01-May-18 SURFACE WATER CQ,.60 < 3.0 01-May-18 SURFACE WATER ZN-65 < 2.4 01-May-18 SURFACE WATER ZR-NB-95 < 3.4 01-May-18 SURFACE WATER 1-131 < 5.4 01-May-18 SURFACE WATER CS-134 < 3.7 01-May-18 SURFACE WATER CS-137 < 4.2 01-May-18 SURFACE WATER BA-LA-140 < 2.4 01-May-18 SURFACE WATER H-3 < 155.0 01-May-18 SURFACE WATER FE-55 < 107.0 13-Jun-18 SURFACE WATER . MN-54 < 3.8 13-Jun-18 SURFACE WATER C0-58 < 1.8 13-Jun-18 SURFACE WATER FE-59 < 7.0 13-Jun-18 SURFACE WATER C0-60 < 3.6 13-Jun-18 SURFACE WATER ZN-65 < 2.8 13-Jun-18 SURFACE WATER ZR-NB-95 < 4.9 13-Jun-18 SURFACE WATER 1-131 < 6.5 13-Jun-18 SURFACE WATER CS-134 < 4.8 13-Jun-18 SURFACE WATER CS-137 < 4.4 13-Jun-18 SURFACE WATER BA-LA-140 < 3.8 13-Jun-18

• SURFACE WATER H-3 < 158.0 16-Jul-18 SURFACE WATER MN-54 < 2.5 16-Jul-18 SURFACE WATER C0-58 < 2.2 16-Jul-18 SURFACE WATER FE-59 < 5.5 16-Jul-18 SURFACE WATER C0-60 < 3.3 16-Jul-18 SURFACE WATER ZN-65 < 6.4 16-Jul-18 SURFACE WATER ZR-NB-95 < 2.1 16-Jul-18 SURFACE WATER 1-131 < 3.2 16-Jul-18 SURFACE WATER CS-134 < 3.2 2018 An~ual Radiological Environmental Operating Report P~ge C -20 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate.

Date Description (pCi/Liter) Analysis 16-Jul-18 SURFACE WATER CS-137 < 2.6 16-Jul-18 SURFACE WATER BA-LA-140 < 2.5 16-Jul-18 SURFACE WATER H-3 < 158.0 13-Aug-18 SURFACE WATER MN-54 < 2.1 13-Aug-18 SURFACE WATER C0-58 < 2.3 13-Aug-18 SURFACE WATER FE-59 < 6.0 13-Aug-18 SURFACE WATER C0-60 < 2.4 13-Aug-18 SURFACE WATER ZN-65 < 2.9 13-Aug-18 SURFACE WATER ZR-NB-95 < 2.4 13-Aug-18 SURFACE WATER 1-131 < 5.0 13-Aug-18 SURFACE WATER CS-134 < 2.8 13-Aug-18 SURFACE WATER CS-137 < 3.5 13-Aug-18 SURFACE WATER BA-LA-140 < 3.3 13-Aug-18 SURFACE WATER H-3 < 151.0 13-Aug-18 SURfACE WATER FE-55 < 170.0 11-Sep-18 SURFACE WATER MN-54 < 4.2 Duplicate 11-Sep-18 SURFACE WATER MN-54 < 5.8 11-Sep-18 SURFACE WATER C0-58 < 2.7 Duplicate 11-Sep-18 SURFACE WATER C0-58 < 4.9 11-Sep-18 SURFACE WATER FE-59 < 6.1 Duplicate 11-Sep-18 SURFACE WATER FE-59 < 6.4 11-Sep-18 SURFACE WATER C0-60 < 4.3 . Duplicate 11-Sep-18 SURFACE WATER C0-60 < 2.5 11-Sep-18 SURFACE WATER ZN-65 < 11.9 11-Sep-18 SURFACE WATER ZN-65 < 4.3 Duplicate 11-Sep-18 SURFACE WATER ZR-NB-95 < 4.7 Duplicate 11-Sep-18 SURFACE WATER ZR-NB-95 < 6.4 11-Sep-18 SURFACE WATER 1-131 < 7.1 11-Sep-18 SURFACE WATER 1-131 < 7.9 Duplicate 11-Sep-18 SURFACE WATER CS-134 < 5.1 11-Sep-18 SURFACE WATER CS-134 < 6.4 Duplicate 11-Sep-18 SURFACE WATER CS-137 < 2.7 11-Sep-18 SURFACE WATER CS-137 < 3.2 Duplicate 11-Sep-18 SURFACE WATER BA-LA-140 < *4.9 Duplicate 11-Sep-18 SURFACE WATER BA-LA-140 < 3.8 11-Sep-18 SURFACE WATER H-3 < 152.0 Duplicate 11-Sep-18 SURFACE WATER H-3 .< 152.0 10-0ct-18 SURFACE WATER MN-54 < 2.7 2018 Annual Radiological Environmental Operating Report Page C - 21 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 1O-Oct-18 SURFACE WATER C0-58 < 2.6 10-0ct-18 SURFACE WATER FE-59 < 2.2 10-0ct-18 SURFACE WATER C0-60 < 1.9 .

10-0ct-18 SURFACE WATER ZN-65 < 5.5 10-0ct-18 SURFACE WATER ZR-NB-95 < 2.4 10-0ct-18 SURFACE WATER 1-131 < 8.4 10-0ct-18 SURFACE WATER CS-134 .< 4.3 1O-Oct-18 SURFACE WATER CS-137 < 3.1 10-0ct-18 SURFACE WATER BA-LA-140 < 1.8 10-0ct-18 SURFACE WATER H-3 < 154.0 10-0ct-18 SURFACE WATER FE-55 < 158.0 13-Nov-18 SURFACE WATER MN-54 < 1.3 13-Nov-18 SURFACE WATER MN-54 < 2.8 Duplicate 13-Nov-18 SURFACE WATER C0-58 < 2.5 13-Nov-18 .SURFACE WATER C0-58 < 1.2 Duplicate 13-Nov-18 SURFACE WATER FE-59 < 5.7 Duplicate 13-Nov-18 SURFACE WATER FE-59 < 5.0 13-Nov-18 SURFACE WATER C0-60 < 1.0 13~Nov-18 SURFACE WATER C0-60 < 1.8 Duplicate 13-Nov-18 SURFACE WATER ZN-65 < 3.1 13-Nov-18 SURFACE WATER ZN-65 < 2.9 Duplicate 13-Nov-18 SURFACE WATER ZR-NB-95 < 3.0 Duplicate 13-Nov-18 SURFACE WATER ZR-NB-95 < 3.3 13-Nov-18 SURFACE WATER 1-131 < 5.4 Duplicate 13-Nov-18 SURFACE WATER 1-131 < 4.7

• 13-Nov-18 SURFACE WATER CS-134 < 2.9

.13-Nov-18 SURFACE WATER CS-134 < 3.1 Duplicate 13-Nov-18 SURFACE WATER CS-137 < 3.1 13-Nov-18 SURFACE WATER CS-137 < 3.6 Duplicate 13-Nov-18 SURFACE WATER BA-LA-140 < 3.7 Duplicate 13-Nov-18 SURFACE WATER BA-LA-140 < 3.2 13-Nov-18 SURFACE WATER H-3 < 151.0 13-Nov-18 SURFACE WATER H-3 < 151.0 Duplicate 10-Dec-18 SURFACE WATER MN-54 < 3.1 10-Dec-18 SURFACE WATER C0-58 < 3.3 10-Dec-18 SURFACE WATER FE-59 < 5.8 10-Dec-18 SURFACE WATER C0-60 <' 2.2 10-Dec-18 SURFACE WATER ZN-65 < 6.9 2018 Annual Radiological Environmental Operating Report Page C -22 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Dec-18 SURFACE WATER ZR-NB-95 < 4.2 10-Dec-18 SURFACE WATER 1-131 *< 4.4 10-Dec-18 SURFACE WATER CS-134 < 4.7 10-Dec-18 SURFACE WATER CS-137 < 3.9 10-Dec-18 SURFACE WATER BA-LA-140 < 2.9 10-Dec-18 SURFACE WATER ' H-3 < 153.0 2018 Annual Radiological Environmental Operating Report Page C -23 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 08-Jan-18 SURFACE WATER MN-54 < 4.6 08-Jan-18 SURFACE WATER C0-58 < 5.0 08-Jan-18 SURFACE WATER FE-59 < 8.3 08-Jan-18 SURFACE WATER C0-60 < 3.6 08-Jan-18 SURFACE WATER ZN-65 < 12.6 08-Jan-18 SURFACE WATER ZR-NB-95 < 6.9 08-Jan-18 SURFACE WATER 1-131 < 9.0 08-Jan-18 SURFACE WATER CS-134 < 5.5 08-Jan-18 SURFACE WATER CS-137 < 4.6 08-Jan-18 SURFACE WATER BA-LA-140 < 6.7 08-Jan-18 SURFACE WATER H-3 11,785 +/- 325.0 05-Feb-18 SURFACE WATER MN-54 < 3.1 05-Feb-18 SURFACE WATER C0-58 < 1.2 05-Feb-18 SURFACE WATER FE-59 < 2.8 05-Feb-18 SURFACE WATER C0-60 < 2.1 05-Feb-18 SURFACE WATER ZN-65 < 3.4 05-Feb-18 SURFACE WATER ZR-NB-95 < 3.6.

05-Feb-18 SURFACE WATER 1-131 < 5.8 05-Feb-18 SURFACE WATER CS-134 < 3.5 05-:Feb-18 SURFACE WATER CS-137 < 2.2 05-Feb-18 SURFACE WATER BA-LA-140 < 1.2 05-Feb-18 SURFACE WATER H-3 14,527 +/- 360.0 05-Feb-18 SURFACE WATER FE-55 < 167.0 26-Mar-18

• SURFACE WATER MN-54 < 3.5 26-Mar~18 SURFACE WATER MN-54 < 2.4 Duplicate 26-Mar-18 SURFACE WATER C0-58 < 2.3 Duplicate 26-Mar-18 SURFACE WATER C0-58 < 2.7 26-Mar-18 SURFACE WATER FE-59 < 3.7 Duplicate 26-Mar-18 SURFACE WATER FE-59 < 4.6 26-Mar-18 SURFACE WATER C0-60 < 1.8 26-Mar-18 SURFACE WATER C0~60 < 1.6 Duplicate 26-Mar-18 SURFACE WATER ZN-65 < 3.5 26-Mar-18 SURFACE WATER ZN-65 < 4.3 Duplicate 26-Mar-18 SURFACE WATER ZR-NB-95 < 2.0 26-Mar-18 SURFACE WATER ZR-NB-95 < 3.0 Duplicate 26-Mar-18 SURFACE WATER 1-131 < 4,0 26-Mar-18 SURFACE WATER 1-131 < 6.5 Duplicate 26-Mar-18 SURFACE WATER CS-134 < 2.6 2018 Annual. Radiological Environmental Operating Report Page C -24 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 26-Mar-18 SURFACE WATER CS-134 < 3.2 Duplicate 26-Mar-18 SURFACE WATER CS-137 < 3.5 Duplicate 26-Mar-18 SURFACE WATER CS-137 < 1.7 26-Mar-18 SURFACE WATER BA-LA-140 < 2.3 Duplicate.

26-Mar-18 SUR~ACE WATER BA-LA-140 < 1.4 26-Mar-18 SURFACE WATER H-3 14,538_+/- 364.0 26-Mar-18 SURFACE WATER H-3 14,647 +/- 365.0 Duplicate 10-Apr-18 SURFACE WATER MN-54 < 2.8 10-Apr-18 SURFACE WATER C0-58 < 3.3 1O-Apr-18 SURFACE WATER FE-59 < 8.3 10-Apr-18 SURFACE WATER C0-60 < 2.9 1O-Apr-18 SURFACE WATER ZN-65 < 7.8 1O-Apr-18 SURFACE WATER ZR-NB-95 < 4.3 10-Apr-18 SURFACE WATER 1-131 < ,, 7.2 1O-Apr-18 SURFACE WATER CS-134 < 3.9 10-Apr-18 SURFACE WATER CS-137 < 2.5 1O-Apr-18 SURFACE WATER BA-LA-140 < 5.0 10-Apr-18 SURFACE WATER H-3 14,775 +/- 367.0 01-May-18 SURFACE WATER MN-54 <' 2.6 01-May-18 SURFACE WATER C0-58 < 2.1 01-May-18 SURFACE WATER FE-59 < 4.1 01-May-18 SURFACE WATER C0-60 < 1.6 01-May-18 SURFACE WATER ZN-65 < 2.9 01-May-18 SURFACE WATER ZR-NB-95 < 3.0 01-May-18 SURFACE WATER 1-131 < 5.0 01-May-18 SURFACE WATER CS-134 < 3.3 01~May-18 SURFACE WATER CS-137 < 3.0 01-May-18 SURFACE WATER BA-LA-140 < 2.2 01-May-18 SURFACE WATER H-3 13,485 +/- 349.0 01-Mai18 SURFACE WATER FE-55 < 109.0 13-Jun-18 SURFACE WATER MN-54 < 5.4 13-Jun-18 SURFACE WATER C0-58 < 3.6 13-Jun-18

• SURFACE WATER FE-59 < 8.1 13-Jun-18 SURFACE WATER . C0-60 < 4.2 13-Jun-18 SURFACE WATER ZN-65 < 7.5 13-Jun-18 SURFACE WATER ZR-NB-95 < 3.8 13-Jun-18 SURFACE WATER 1-131 < 12.6 13-Jun-18 SURFACE WATER CS-134 < . 5.0 2018 Annual Radiological Environmental Operating Report Page C -25 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Jun-18 SURFACE WATER CS-137 < 3.2 13-Jun-18 SURFACE WATER BA-LA-140 < 8.9 13-Jun-18 SURFACE WATER H-3 13,892 +/- 356.0 16-Jul-18 SURFACE WATER MN-54 < 2.5 16-Jul-18 SURFACE WATER C0-58 < 2.1 16-Jul-18 SURFACE WATER FE-59 < 3.1 16-Jul-18 SURFACE WATER C0-60 < 1.9 16-Jul-18 SURFACE WATER ZN-65 < 3.2 16-Jul-18 SURFACE WATER ZR-NB-95 .< 2.5 16-Jul-18 SURFACE WATER 1-131 < 5.0 16-Jul-18 SURFACE WATER CS-134 < 3.1 16-Jul-18 SURFACE WATER CS-137 < 2.4 16-Jul-18 SURFACE WATER BA-LA-140 < 2.2 16-Jul-18 SURFACE WATER H-3 11,918+/- 325.0 13-Aug-18 SURFACE WATER .MN-54 < 3.1 13-Aug-18 SURFACE WATER C0-58 < 2.4 13-Aug-18 SURFACE WATER FE-59 < 2.9

.13-Aug-18 SURFACE WATER C0-60 < 1.7 13-Aug-18* SURFACE WATER ZN-65 < 4.8 13-Aug-18 SURFACE WATER ZR-NB-95 < 3.6 13-Aug-18 SURFACE WATER 1-131 < 3.3 13-Aug-18 SURFACE WATER CS-134 < 3.2 13-Aug-18 SURFACE WATER CS-137 < 3.4 13-Aug-18 SURFACE WATER BA-LA-140 < 1.6 13-Aug-18 SURFACE WATER H-3 11,115 +/- 313.0 13-Aug-18 SURFACE WATER FE-55 < 167.0 11-Sep-18 SURFACE WATER MN-54 < 5.6 11-Sep-18 SURFACE WATER C0:-58 < 6.0 11-Sep-18 SURFACE WATER FE-59 < 10.0 11-Sep-18 SURFACE WATER C0-60 < 4.4 11-Sep-18 SURFACE WATER ZN-65 < 10.6 11-Sep-18 SURFACE WATER ZR-NB-95 < 7.2 11-Sep-18 SURFACE WATER 1-131 < 6.6 11-Sep-18 SURFACE WATER CS-134 < 7.4 11-Sep-18 SURFACE WATER CS-137 <* 4.0 11-Sep-18 SURFACE WATER BA-LA-140 < 7.7 11-Sep-18 SURFACE WATER H-3 9,392 +/- 291.0 10-0ct-18 SURFACE WATER MN-54 < 2.6 2018 Annual Radiological Environmental Operating Report Page C -26 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-0ct-18 SURFACE WATER C0-58 < 2.7

',, 10-0ct-18 SURFACE WATER FE-59 < 6.3 10-0ct-18 SURFACE WATER *C0-60 < 3.1 10-0ct-18 SURFACE WATER ZN-65 < 3.0 1O-Oct-18 SURFACE WATER ZR-NB-95 < 3.3 10-0ct-18 SURFACE WATER 1-131 < 7.4

• 10-0ct-18 SURFACE WATER CS-134 < 3.5 10-0ct-18 SURFACE WATER CS-137 < 3.1 10-0ct-18 SURFACE WATER BA-LA-140 < 1.6 10-0ct-18 SURFACE WATER H-3 9,518 +/- 292.0 10-0ct-18 SURFACE WATER FE-55 < 154.0 13-Nov-18 SURFACE WATER MN-54 < 2.3 13-Nov-18 SURFACE WATER C0-58 < 3.3 13-Nov-18 SURFACE WATER FE-59 < 5.0 13-Nov-18 SURFACE WATER C0-60 < 2.5 13-Nov-18 SURFACE WATER ZN-65 < 6.0 13-Nov-18 SURFACE WATER ZR-NB-95 < 3.1 13-Nov-18 SURFACE WATER 1-131 < 6.0 13-Nov-18 SURFACE WATER CS-134 < 3.7

• 13-Nov-18 SURFACE WATER CS-137 < 3.0 13-Nov-18 SURFACE WATER BA-LA-140 < 4.5 13-Nov-18 SURFACE WATER H-3 9,101 +/- 286.0 10-Dec-18 SURFACE WATER MN-54 < 2.7 Duplicate 10-Dec-18 SURFACE WATER MN-54 < 3.2 10-Dec-18 SURFACE WATER C0-58 < 2.3 Duplicate 10-Dec-18 SURFACE WATER C0-58 < 1.6 10-Dec-18 SURFACE WATER FE-59 < 5.7 Duplicate 10-Dec-18 SURFACE WATER FE-59 < 3.2 10-Dec-18 SURFACE WATER C0-60 < 1.7 Duplicate 10-Dec-18 SURFACE WATER C0-60 < 2.6 10-Dec-18 SURFACE WATER ZN-65 < 2.3 Duplicate 10-Dec-18 SURFACE WATER ZN~65 < 3.8 10-Dec-18 SURFACE WATER ZR-NB-95 < 2.6 Duplicate 10-Dec-18 SURFACE WATER ZR-NB-95 < 2.4 10-Dec-18 SURFACE WATER 1-131 < 3.3 Duplicate 10-Dec-18 SURFACE WATER 1-131 < 4.4 10-Dec-18 SURFACE WATER CS-134 < 3.3 Duplicate 10-Dec-18 SURFACE WATER CS-134 < 3.2 2018 Annual Radiological Environmental Operating Report Page C - 27 Wolf Creek Generating Station

Exposure Pathway - Waterborne Surface Water Location: SP Gollection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 10-Dec-18 SURFACE WATER CS-137 < 2.2 . Duplicate 10-Dec-18

• SI.JRFACE WATER CS-137 < 2.1 10-Dec-18 SURFACE WATER BA-LA-140 < 3.3 Duplicate 10-Dec-18 SURFACE WATER BA-LA-140 < 2.3 10-Dec-18 SURFACE WATER H-3 9,105 +/- 288.0 Duplicate 10-Dec-18 SURFACE WATER H-3 9,251 +/- 290.0 2018 Annual Radiological Environmental Operating Report Page C -28 Wolf Creek Generating Station

I I

I Exposure Pathway - Waterborne Ground Water Location: 8-12 Collection Sample Nuclide Concentration

• Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 GROUND WATER MN-54 < 3.4 05-Feb-18 GROUND WATER C0-58 < 2.5 05-Feb-18 GROUND WATER FE-59 < 6.6 05-Feb-18 GROUND WATER C0-60 < 2.7 05-Feb-18 GROUND WATER ZN-65 < 4.4 05-Feb-18 GROUND WATER ZR-NB-95 < 1.4 05-Feb-18 GROUND WATER 1-131 < 0.365 05-Feb-18 GROUND WATER

• CS-134 < 3.6 05-Feb-18 GROUND WATER CS-137 < 3.2 05-Feb-18 GROUND WATER . BA-LA-140 < 2.2 05-Feb-18 GROUND WATER H-3 < 156.0 22-May-18 GROUND WATER MN-54 < 3.1 22-May-18 GROUND WATER C0-58 < 2.9 22-May-18 GROUND WATER FE-59* < 5.4 22-May-18 GROUND WATER C0-60 < 3.0 22-May-18 GROUND WATER ZN-65 < 6.7 22-May-18 GROUND WATER ZR-NB-95 < 3.1 22-May-18 GROUND WATER 1-131 < 0.476 22-May-18 GROUND WATER CS-134 <* 3.3 22-May-18 GROUND WATER CS-137 < 3.9 22-May-18 GROUND WATER BA-LA-140 < 2.8 22-May-18 GROUND WATER H-3 < 156.0 13-Aug-18 GROUND WATER MN-54 < 3.4 13-Aug-18 GROUND WATER C0-58 < 3.3 13-Aug-18 GROUND WATER FE-59 < 3.6 13-Aug-18 GROUND WATER C0-60 < 2.8 13-Aug-18 GROUND WATER ZN-65 < 3.4 13-Aug-18 GROUND WATER ZR-NB-95 < 2.5 13-Aug-18 GROUND WATER 1-131 < 0.443 13-Aug-18 GROUND WATER CS-134 < 4.5 13-Aug-18 GROUND WATER CS-137 < 2.1 13-Aug-18 GROUND WATER BA-LA-140 < 1.9 13-Aug-18 GROUND WATER H-3 < 151.0 13-Nov-18 GROUND WATER MN-54 < 3.4 13-Nov-18 GROUND WATER C0-58 < 2.9 13-Nov-18 GROUND WATER FE-59 < 4.2 13-Nov-18 GROUND WATER C0-60 < 1.5 13-Nov-18 GROUND WATER ZN-65 < 4.4 2018 Annual Radiological Environmental Operating Report Page C -29 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: B-12 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER . ZR-NB-95 < 3.0 13-Nov-18 GROUND WATER 1-131 < 0.27 13-Nov-18 GROUND WATER CS-134 < 3.6 13-Nov-18 GROUND WATER CS-137 < 4.5 13-Nov-18 GROUND WATER BA-LA-140 < 1.4 13-Nov-18 GROUND WATER H-3 < 151.0 2018 Annual Radiological Environmental Operating Report Page.C - 30 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-10 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 GROUND WATER MN-54 < 2.2 05-Feb-18 GROUND WATER C0-58 .< 2.6 05-Feb-18 GROUND WATER FE-59 < 4.0 05-Feb-18 GROUND WATER C0-60 < 1.7 05-Feb-18 GROUND WATER ZN-65 < 2.4 05-Feb-18 GROUND WATER ZR-NB-95 < 2.9 05-Feb-18 GROUND WATER 1-131 < 0.376 05-Feb-18 GRQUND WATER CS-134 < 2.8*

05-Feb-18 GROUND WATER CS-137 < 2.3 05-Feb-18. GROUND WATER BA-LA-140 < 2.1 05-Feb-18 GROUND WATER H-3 < 156.0 22-May-18. GROUND WATER MN-54 < 2.3 22-May-18 GROUND WATER C0-58 < 1.4 22-May-18 GROUND WATER FE-59 < 3.3 22-May-18 GROUND WATER C0-60 < 1.5 22-May-18 GROUND WATER ZN-65 < 2.6 22-May-18 GROUND WATER ZR-NB-95 < 3.4 22-May-18 GROUND WATER 1-131 < 0.457 22-May-18 GROUND WATER CS-134 < 2.7 22-May-18 GROUND WATER CS-137 < 2.7 22-May-18 GROUND WATER BA-LA-140 < 2.2 22-May-18 GROUND WATER H-3 < 156.0 13-Aug-18 GROUND WATER MN-54 < 2.1 13-Aug-18 GROUND WATER C0-58 < 2:3 13-Aug-18 GROUND WATER FE-59 < 2.8 13-Aug-18 GROUND WATER C0-60 < 2.3 13-Aug-18 GROUND WATER ZN-65 < 5.9 13-Aug-18 GROUND WATER ZR~NB-95 < 3.5 13-Aug-18 GROUND WATER 1-131 < 0.429 13-Aug-18 GROUND WATER CS-134 < 4.1 13-Aug-18 GROUND WATER CS-137 < 3.5 13-Aug-18 GROUND WATER BA-LA-140 < 3.9 13-Aug-18 GROUND WATER 1H-3 < 151.0 13-Nov-18 GROUND WATE_R MN-54 < 3.1 13-Nov-18 GROUND WATER C0-58 < 2.0 13-Nov-18 GROUND WATER FE-59 < 3.6 13-Nov-18 GROUND WATER C0-60 < 2.9.

13-Nov-18 GROUND WATER ZN-65 < 2.4 2018 Annual Radiological Environmental Operating Report Page C - 31 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-10 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 3.2 13-Nov-18 GROUND WATER 1-131 < 0.369 13-Nov-18 GROUND WATER CS-134 < 3.7 13-Nov-18 GROUND WATER CS-137 < 2.7 13-Nov-18 GROUND WATER BA-LA-140 < 3.1 13-Nov-18 GROUND WATER H~3 < 151.0 2018 Annual Radiological Environmental Operating Report Page C - 32 Wolf Creek Generating Station

Exposure Pathway -Waterborne Ground Water Location: c~49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 GROUND WATER MN-54 < 2.8 05-Feb-18 GROUND WATER C0-58 < 3.0 05-Feb-18 GROUND WATER FE-59 < 4.1 05-Feb-18 GROUND WATER C0-60 < 2.2 05-Feb-18 GROUND WATER ZN-65 < 6.3 05-Feb,.18 GROUNDWATER ZR-NB-95 < 3.0 05-Feb-18 GROUND WATER 1-131 < 0.401 05-Feb-18 GROUND WATER CS-134 < 3.2 05-Feb-18 GROUND WATER cs.:.137 < 1.9 05-Feb-18 GROUND WATER BA-LA-140 < 2.9 05-Feb-18 GROUND WATER H-3 < 156.0 22-May-18 GROUND WATER MN-54 < 3.3 22-May-18 GROUND WATER C0-58 < 2.9 22-May-18 GROUND WATER FE-59 < 6.4 22-May-18 GROUND WATER C0-60 < 3.2 22-May-18 GROUND WATER ZN-65 < 3.1 22-May-18 GROUND WATER ZR-NB-95 < 3.4 22-May-18 GROUND WATER 1-131 < 0.469 22-May-18 GROUND WATER CS-134 < 4.8 22-May-18 GROUND WATER cs~137 < 3.7 22-May-18 GROUND WATER BA-LA-140 < 4.4 22-May-18 GROUND WATER H-3 < 156.0 13-Aug-18 GROUND WATER MN-54 < 3.7 13-Aug-18 GROUND WATER C0-58 < 1.9 13-Aug-18 GROUND WATER FE-59 *< 4.5 13-Aug-18 GROUND WATER C0-60 < 1.8 13-Aug-18 GROUND WATER ZN-65 < 6.9 13-Aug-18 GROUND WATER ZR-NB-95 < 3.7 13-Aug-18 GROUND WATER 1-131 < 0.409 13-Aug-18 GROUND WATER CS-134 < 2.9 13-Aug-18 GROUND WATER CS-137 < 3.7 13-Aug-18 GROUND WATER BA-LA-140 < 1.3 13-Aug-18 GROUND WATER H-3 < 151.0 13-Nov-18 GROUND WATER MN-54 < 2.4 13-Nov-18 GROUND WATER C0-58 < 2.1 13-Nov-18 GROUND WATER FE-59 < 4.5 13-Nov-18 GROUND WATER C0-60 < 1.4 13-Nov-18 GROUND-WATER ZN-65 < 6.0 2018 Annual Radiological Environmen.tal Operating Report Page C - 33 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: C-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 1.8 13-Nov-18 GROUND WATER 1-131 < 0.25 13-Nov-18 GROUND WATER CS-134 < 2.8 13-Nov-18 GROUND WATER CS-137 < 2.6 13-Nov-18 GROUND WATER BA-LA-140 <

• 2.3 13-Nov-18 GROUND WATER H-3 < 151.0 2018 Annual Radiological Environmental Operating Report Page C -34 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: F-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 GROUND WATER MN-54 < 5.5 05-Feb-18 GROUND WATER C0-58 < 2.4 05-Feb-18 GROUND WATER FE-59 < 6.7 05-Feb-18 GROUND WATER C0-60 < 3.2 05-Feb-18 GROUND WATER ZN-65 < 3.1 05-Feb-18 GROUND WATER ZR-NB-95 < 4.6 05-Feb-18 GROUND WATER 1-131 < 0.335 05-Feb-18 GROUND WATER CS-134 < 5.4 05-Feb-18 GROUND WATER CS-137 < 5.1 05-Feb-18 GROUND WATER BA-LA-140 < 3.6 05-Feb-18 GROUND WATER H-3 < 156.0 22-May-18 GROUND WATER MN-54 < 1.8 22-May-18 GROUND WATER C0-58 < 2.4 22-May-18 GROUND WATER FE-59 < 5.4 22-May-18 GROUND WATER C0-60 < 2.8 22-May-18 GROUND WATER ZN-65 < 2.0 22-May-18 GROUND WATER ZR-NB-95 < 3.2 22-May-18 GROUND WATER 1-131 < 0.432 22-May-18 GROUND WATER CS-134 < 3.0 22-May-18 GROUND WATER CS-137 < 2.7 22-May-18 GROUND WATER BA-LA-140 < 2.8 22-May-18 GROUND WATER H~3 < 156.0 13-Aug-18 GROUND WATER MN-54 < 2.2 13_-Aug-18 GROUND WATER C0-58 < 3.5 13-Aug-18 GROUND WATER FE-59 < 5.4 13-Aug-18 GROUND WATER C0-60 < 1.7 13-Aug-18 GROUND WATER ZN-65 < 6.0 13-Aug-18 GROUND WATER ZR-NB-95 < 1.8 13-Aug-18 GROUND WATER 1-131 < 0.243 13-Aug-18 GROUND WATER CS-134 .< 3.3 13-Aug-18 GROUND WATER . CS-137 < 2.0 13-Aug-18 GROUND WATER BA-LA-140 < 1.6 13-Aug-18 GROUND WATER* H-3 < 151.0

.13-Nov-18 GROUND WATER MN-54 < 2.3 13-Nov-18 GROUND WATER C0-58 < 1.7 13-Nov-18 GROUND WATER FE-59 < 4.4 13-Nov-18 GROUND WATER C0-60 < 2.1 13-Nov-18 GROUND WATER ZN-65 < 1.3 2018 Annual Radiological Environmental Operating Report Page C -35 Wolf Creek Generating Station

Exposure Pathway - Waterborne

. Ground Water Location: F-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 2.5 13-Nov-18 GROUND WATER 1-131 < 0.251 13-Nov-18 GROUND WATER CS-134 < 2.7 13-Nov-18 GROUND WATER CS-137 <. 2.1 13-Nov-18 GROUND WATER BA-LA-140 < 3.0 13-Nov-18 GROUND WATER H-3 < 151.0 2018 Annual Radiological Environmental Operating Report Page C -36 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: G-2 Collection Sample Nuclide Concentration Duplicate Date Desc"ription (pCi/Liter)

• Analysis

. 05-Feb-18 GROUND WATER MN-54 < 1.4 05-Feb-18 GROUND WATER C0-58 < 1.5

. 05-Feb-18 GROUND WATER FE-59 < 2.6 05-Feb-:18 GROUND WATER C0-60 < 1.5 05-Feb-18 GROUND WATER ZN-65 < 3.0 05-Feb-18 GROUND WATER ZR-NB-95 < 1.7 05_-Feb-18 GROUND WATER 1~131 < 0.294 05-Feb-18 GROUND WATER CS-134 < 1.6 05-Feb-18 GROUND WATER CS-137 < 1.6 05-Feb-18 GROUND WATER BA-LA-140 < 1.9 05-Feb-18 GROUND WATER . H-3 < 156.0 22-May-18 GROUND WATER MN-54 < 2.3 22-May-18 GROUND WATER C0-58 < 3.0 22-May-18 GROUND WATER FE-59 < 5.6 22-May-18 GROUND WATER C0-60 <* 3.2 22-Max-18 GROUND WATER ZN-65 < 3.0 22-May-18 GROUND WATER ZR-NB-95 < 2.3 22-May-18 GROUND WATER 1-131 < . 0.468 22-May-18 GROUND WATER CS-134 < 3.1 22;:-May-18 GROUND WATER CS-137 < 3.2 22-May-18 GROUND WATER BA-LA-140 < 3.7 22-May-18 GROUND WATER H-3 < 156.0 13-Aug-18 GROUND WATER . MN-54 < 3.2 13-Aug-18 GROUND WATER C0-58 < 1.9 13-Aug-18 . GROUND WATER FE~59 < 3.7 13-Aug-18 GROUND WATER C0-60 < 1.6 13-Aug-18 GROUND WATER ZN-65 < 5.2 13-Aug-18 GROUND WATER ZR-NB-95 < 3.3 13-Aug-18 GROUND WATER 1-131 < 0.397 13-Aug-18 GROUND WATER CS-134 < 3.5 13-Aug-18 GROUND WATER CS-137 < 3.4 13-Aug-18 GROUND WATER BA-LA-140 < 3.1 13-Aug-18 GROUND WATER H-3 < 151.0 13-Nov-18 GROUND WATER MN-54 < 2.2 13-Nov-*18 GROUND WATER C0-58 < 2.5 13-Nov-18 GROUND WATER FE-59 < 6.0 13-Nov-18 GROUND WATER C0-60 < 2.5 13-Nov-18 GROUND WATER ZN-65 *< 8.3 2018 Annual Radi~logical Environmental Operating Report Page C - 37 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: G-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 2.8 13-Nov-18 GROUND WATER 1-131 < 0.368 13-Nov-18 GROUND WATER CS-134 < 4.0 13-Nov-18 GROUND WATER CS-137 < 2.6 13-Nov-18 GROUND WATER BA-LA-140 < 2.8 13-Nov-18 GROUND WATER H-3 < 151.0 2018 Annual Radiological Environmental Operating Report Page C - 38 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 GROUND WATER MN-54 < 2.9 05-Feb-18 GROUND WATER CQ..:58 < 3.1 05-Feb-18 GROUND WATER FE-59 *< 6.2 05-Feb-18 GROUND WATER C0-60 < 2.3 05-Feb-18 GROUND WATER ZN-65 < 4.8 05-Feb-18 GROUND WATER ZR-NB-95 < 3.0 05-Feb-18 GROUND WATER 1-131 < 0.196 05-Feb-18 GROUND WATER CS-134 < 3.4 05-Feb-18 GROUND WATER CS-137 < 2.8 05-Feb-18 GROUND WATER BA-LA~140 < 4.3 05-Feb-18 GROUND WATER H-~ < 156.0 22-May-18 GROUND WATER MN-54 < 3.0 22-May-18 GROUND WATER C0-58 < 3.0 22-May-18 GROUND WATER FE-59 < 5.3 22-May-18 GROUND WATER C0-60 < 3.0 22-May-18 GROUND WATER ZN-65 < 7.1 22-May-18 GROUND WATER ZR-NB-95 < 2.8 22-May-18. GROUND WATER 1-131 < 0.319 22-May-18 GROUND WATER CS-134 < 4.3 22-May-18 GROUND WATER CS-137 < 3.6 22-May-18 GROUND WATER BA-LA-140 < 3.1 22-May-18 GROUND WATER H-3 < 156.0 13-Aug-18 GROUND WATER MN-54 < 3.7 13-Aug-18 GROUND WATER C0-58 < 3.3 13-Aug-18 GROUND WATER FE-59 < 6.2 13-Aug-18 GROUND WATER C0-60 < *2.1 13-Aug-18 GROUND WATER ZN-65 < 5.8 13-Aug-18 GROUND WATER ZR-NB-95 < 2.7 13-Aug-18 GROUND WATER 1-131 < 0.257 13-Aug-18 GROUND WATER CS-134 < 3.2 13-Aug-18 GROUND WATER CS-137 < 3.3 13-Aug-18 GROUND WATER BA-LA-140 < 3.7 13-Aug-18 GROUND WATER H-3 < 151.0 13-Nov-18 GROUND WATER MN-54 < 2.1 13-Nov-18 GROUND WATER C0-58 < 3.1 13-Nov-18 GROUND WATER FE-59 < 5.0 13-Nov-18 GROUND WATER C0-60 < 2.7 13-Nov-18 GROUND WATER ZN-65 < 5.1 2018 Annual Radiological Environmental Operating Report Page C - 39 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 3.8 13-Nov-18 GROUND WATER 1-131 < 0.316 13-Nov-18 GROUND WATER CS-134 < 3.1 13-Nov-18 GROUND WATER CS-137 < 3.2 13~Nov-18 GROUND WATER BA-LA-140 < 2.0 13-Nov-18 GROUND WATER H-3 < 151.0 2018 Annual Radiological Environmental Operating Report Page C -40 Wolf Creek Generating Station

Exposure Pathway - Waterborne Groun'd Water Location: J-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 GROUND WATER MN-54 < 2.9 05-Feb-18 GROUND WATER C0-58 < 2.6 05-Feb-18 GROUND WATER FE-59 < 5.4 05-Feb-18 GROUND WATER C0-60 < 3.6 05-Feb-18 GROUND WATER ZN-65 < 5.1

. 05-Feb-18 GROUND WATER ZR-NB-95 < 2.6 05-Feb-18 GROUND WATER 1-131 <. 0.385 05-Feb-18 GROUND WATER CS-134 < 3.1 05-Feb-18 GROUND WATER CS-137 < 2.8 05-Feb-*18 GROUND WATER BA-LA-140 < 2.4 05-Feb-18 GROUND WATER H-3 < 156.0 22-May-18 GROUND WATER MN-54 < 2.9 22-May-18 GROUND WATER C0-58 < 3.4 22-May-18 GROUND WATER FE-59 < 3.4 22-May-18 GROUND WATER C0-60 < 2.8 22-May-18 GROUND WATER ZN-65 < 5.5 22-May-18 GROUND WATER ZR-NB-95 < 4.0 22-May-18 GROUND WATER 1-131 < 0.354 22-May-18 GROUND WATER cs~134 < 3.3 22-May-18 GROUND WATER CS-137 < 2.4 22-May~18 GROUND WATER BA-LA-140 < 3.1 22-May-18 GROUND WATER H-3 < 156.0 13-Aug-18 GROUND WATER MN-54 < 4.6 13-Aug-18 GROUND WATER C0-58 < 3.5 13-Aug-18. GROUND WATER FE-59 < 7.5 13-Aug-18 GROUND WATER C0-60 < 3.0 13-Aug-18 GROUND WATER ZN-65 < 9.7 13-Aug-18 GROUND WATER ZR-NB-95 "< 3.1 13-Aug-18 GROUND WATER 1-131 < 0.408 13-Aug-18 GROUND WATER CS-134 "< 5.3 13-Aug-18 GROUND WATER CS-137 < 5.5 13-Aug-18 GROUND WATER BA-LA-140 < 3.9 13-Aug-18 GROUND WATER H-3 < 151.0 13-Nov-18 GROUND WATER MN-54 < 1.8 13-Nov-18 GROUND WATER C0-58 < 1.8 13-Nov-18 GROUND WATER . FE-59 < 5.0 13-Nov-18 GROUND WATER C0-60 < 1.7 13-Nov-18 GROUND WATER ZN-65 < 6.0 2018 Annual Radiological Environmental Operating Report Page C -41 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: J-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 2.9 13-Nov-18 GROUND WATER 1-131 < 0.369 13-Nov-18 GROUND WATER CS-134 < 3.0 13-Nov-18 GROUND WATER CS-137 < 3.6 13-Nov-18 GROUND WATER BA-LA-140 < 3.0 13-~ov-18 GROUND WATER H-3 < 151.0 2018 Annual Radiological Environmental Operating Report Page C -42 Wolf Creek Generating Station

Exposure Pathway - Waterborne Ground Water Location: L-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 05-Feb-18 . GROUND WATER MN-54 < 2.2 05-Feb-18 GROUND WATER C0-58 < 2.7 05-Feb-18 GROUND WATER . FE-59 <* 3.7 05-Feb-18. GROUND WATER C0-60 < 1.7 05-Feb-18 GROUND WATER ZN-65 < 4.2 05-Feb-18 GROUND WATER ZR-NB-95 < 2.2 05-Feb-18 GROUND WATER 1-131 < 0.396 05-Feb-18 GROUND WATER CS-134 < 3.2

. 05-Feb-18 GROUND WATER CS-137 < 2.3 05-Feb-18 GROUND WATER BA-LA-140 < 2.8 05-Feb-18 GROUND WATER H-3 < 156.0 22-May-18 GROUND WATER MN-54 < 3.2 22-May-18 GROUND WATER C0-58 < 4.7 22-May-18. GROUND WATER FE-59 < 8.3 22-May-18 GROUND WATER C0-60 < 3.2 22-May-18

• GROUND WATER ZN-65 < 5.7 22-May-18 GROUND WATER ZR-NB-95 < 3.0 22-May-18 GROUND WATER 1-131 < 0.428 22-May-18 GROUND WATER CS-134 < 4.8 22-May-18 GROUND WATER CS-137 < 4.1 22-May-18 GROUND WATER BA-LA-140 < 2.9 22-May-18 GROUND WATER H-3 < 156.0

• 13-Aug-18 GROUND WATER MN-54 < 2.7 13-Aug-18 GROUND WATER C0-58 < 3.8 13~Aug-18 GROUND WATER FE-59 < 2.2 13-Aug-18 GROUND WATER C0-60 < 2.0 13-Aug-18 GROUND WATER ZN-65 < 5.0 13-Aug-18 GROUND WATER ZR-NB-95 < 2.9 13-Aug-18 GROUND WATER 1-131 < 0.282 13-Aug-18 GROUND WATER CS-134 < 4.3 13-Aug-18 GROUND WATER CS-137 < 3.2 13-Aug-18 GROUND WATER BA-LA-140 < 1.5 13-Aug-18 GROUND WATER H-3 < 151.0 13-Nov-18, GROUND WATER MN-54 < 1.9 13-Nov-18 GROUND WATER C0-58 < 1.4 13-Nov-18 GROUND WATER FE-59 < 6.5 13-Nov-18 GROUND WATER C0-60 < 1.7 13-Nov-18 GROUND WATER ZN-65 < 4.7 2018 Annual Radiological Environmental Operating Report Page C -43 Wolf Creek Generating Station

Exposure Pathway

• Waterborne Ground Water Location: L-49 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Liter) Analysis 13-Nov-18 GROUND WATER ZR-NB-95 < 2.4 13-Nov-18 GROUND WATER 1-131 < 0.347 13-Nov-18 GROUND WATER CS-134 < 3.4 13-Nov-18 GROUND WATER CS-137 < 4.1 13-Nov-18 GROUND WATER BA-LA-140 < 3.5 Nov-_18 GROUND WATER H-3 < 151.0 I.

2018 Annual Radiological Environmental Operating Report Page C

• 44 Wolf Creek Generating Station

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 05-Feb-18 MN-54 < 2.8 05-Feb-18 C0-58 < 2.4 05-Feb-18 FE-59 < 4.9 05-Feb-18 C0-60 < 2.2 05-Feb-18 ZN-65 < 3.1 05-Feb-18 ZR-NB-95 < 2.6 05-Feb-18 1-131 < 0.367 05-Feb-18 CS-134 < 3.2 05-Feb-18 CS-137. < 3.8 05-Feb-18 BA-LA-140 < 1.6 05-Feb-18 GROSS BETA 3.694 +/- 0.733 05-Mar-18 MN-54 < 2.0 05-Mar-18 C0-58 < 2.0 05-Mar-18 FE-59 < 6.1 05-Mar-18 C0-60 < 2.0 05-Mar-18 ZN-65 < 5.8 05-Mar-18 ZR-NB-95 < 2.1 05-Mar-18 1-131 < 0.211 05-Mar-18 CS-134 < 3.2 05-Mar-18 CS-137 < 2.4 05-Mar-18 BA-LA-140  :< 1.8 05-Mar-18 GROSS BETA 2.721 +/- 0.664 03-Apr-18 MN-54 < 2.1 03-Apr-18 C0-58 < 4.0 03-Apr-18. FE-59 < 1.6 03-Apr-18 C0-60 < 1.5 03-Apr-18 ZN-65 < 3.1 03-Apr-18 ZR-NB-95 < 2.6 03-Apr-18 1-131 < 0.283 03-Apr-18 CS-134 < 3.5 03-Apr-18 CS-137 < 2.9 03-Apr-18 BA-LA-140 < 2.9 03-Apr-18 GROSS BETA 2.501 +/- 0.611 03-May-18 MN-54 < 3.0 03-May-18 C0-58 < 2.5 03-May-18 FE-59 < 4.1 03-May-18 C0-60 < 2.0 03-May-18 ZN-65 < 3.2 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -45

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 03-May-18 ZR-NB-95 < 2.5 03-May-18 1-131 < 0.419 03-May-18 CS-134 < 3.4 03-May-18 CS-137 < 2.5 03-May-18 BA-LA-140 < 3.0 03-May-18 GROSS BETA 2.206 +/- 0.623 05-Jun-18 MN-54 < 3.4 05-Jun-18 C0-58 < 2.8 05-Jun-18 FE-59 < 8.7 05-Jun-18 C0-60 < 2.9 05-Jun-18 ZN-65 < 2.9 05-Jun-18 ZR-NB-95 < 4.0 05-Jun-18 1-131 < 0.472 05-Jun-18 CS-134 < 4.9 05-Jun-18 CS-137 < 3.7 05-Jun-18 BA-LA-140 < 4.7 05-Jun-18 GROSS BETA 1.998 +/- 0.615 05-Jul-18 MN-54 < 2.6 05-Jul-18 C0-58 < 1.9 05-Jul-18 FE-59 < 4.1 05-Jul-18 C0-60 < 2.4 05-Jul-18 ZN-65 < 5.9 05-Jul-18 ZR-NB-95 < 3.0 05-Jul-18 1-131 < 0.403 05-Jul-18 CS-134 < 2.8 05-Jul-18 CS-137 < 3.4 05-Jul-18 BA-LA-140 < 2.8 05-Jul-18 GROSS BETA 3.547 +/- 0.722 09-Aug-18 MN-54 < 3.4 09-Aug-18 C0-58 < 2.4 09-Aug-18 FE-59 < 6.0 09-Aug-18 C0-60 < 1.8.

09-Aug-18 ZN-65 < 3.1 09-Aug-18 ZR-NB-95 < 3.2 09-Aug-18 1-131 < 0.415 09-Aug-18 CS-134 < 4.0 09-Aug-18 CS-137 < 3.4 09-Aug-18 BA-LA-140 < 1.7 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -46

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 09-Aug-18 GROSS BETA 3.110 +/- 0.705 04-Sep-18 MN-54 < 2.8 04-Sep-18 C0-58 < 2.2 04-Sep-18 FE-59 < 3.9 04-Sep-18 C0-60 < 1.9 04-Sep-18 ZN-65 < 4.2 04-Sep-18. ZR-NB-95 < 2.8 04-Sep-18 1-131 < 0.394 04-Sep-18 CS-134 < 3.2 04-Sep-18 CS-137 < 3.8 04-Sep-18 BA-LA-140 < 1.8 04-Sep-18 GROSS BETA 3.202 +/- 0.704 04-0ct-18 MN-54 < 2.0 04-0ct-18 C0-58 < 2.6 04-0ct-18 FE-59 < 4.8 04-0ct-18 C0-60 < 1.8 04-0ct-18 ZN-65 < 2.6 04-0ct-18 ZR-NB-95 < 2.9 04-0ct-18 1-131 < 0.443 04-0ct-18 CS-134 < 3.0 04-0ct-18 CS-137 < 3.1

. 04-0ct-18

• BA-LA-140 < 1.9 04-0ct-18 GROSS BETA 2.767 +/- 0.659 05-Nov-18 MN-54 < 2.2 05-Nov-18 C0-58 < 2.6 05-Nov-18 FE-59 < 4.0 05-Nov-18 C0-60 < 2.8 05-Nov-18 ZN-65 < 2.9 05-Nov-18 ZR-NB-95 < 3.0 05-Nov-18 1-131 < 0.476 05-Nov-18 CS-134 < 3.2 05-Nov-18

• CS-137 < 2.7 05-Nov-18 BA-LA-140 < 3.3 05-Nov-18 GROSS BETA 2.298 +/- 0.647 06-Dec-18 MN-54 < 3.0 06-Dec-18 C0-58 < 2.3 06-Dec-18 FE-59 < 7.3 06-Dec-18 C0-60 < 3.2 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -47

Exposure Pathway - Waterborne Drinking Water Location: BW-15 Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 06-Dec-18 ZN-65 < 6.9 06-Dec-18 ZR-NB-95 < 2.8 06-Dec-18 1-131 < 0.387 06-Dec-18 CS-134 < 4.5 06-Dec-18 CS-137 < 2.9 06-Dec-18 BA-LA-140 < 1.9 06-Dec-18 GROSS BETA . 3.347 +/- 0.712 07-Jan-19 MN-54 < 1.7 07-Jan-19 C0-58 < 1.7 07-Jan-19 FE-59 < 3.9 07-Jan-19 C0-60 < 1.9 07-Jan-19 ZN-65 < 4.3 07-Jan-19 ZR-NB-95 < 2.8 07-Jan-19 1-131 < 0.29 07-Jan-19 CS-134 < 2.9 07-Jan-19 CS-137 < 2.2 07-Jan-19 BA-LA-140 < 2.8 07-Jan-19 GROSS BEJA 5.143 +/- 0.824 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 48

Exposure.Pathway-Waterborne Drinking Water Location: 10-DW Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis

. 05-Feb-18 MN-54 < 1.9 05-Feb-18 C0-58 < 1.9 05-Feb-18 FE-59 < 4.8 05-Feb-18 C0-60 < 1.8 05-Feb-18 ZN-65 < 4.4 05-Feb-18 ZR-NB-95 < 2.1 05-Feb-18 1-131 < 0.355 05-Feb-18 CS-134 < 2.6 05-Feb-18 CS-137 < 1.5 05-Feb-18 BA-LA-140 < 2.3 05-Feb-18 GROSS BETA 2.973 +/- 0.523 05-Mar-18 MN-54 < 3.0 05-Mar-18 C0-58 < 1.5 05-Mar-18 FE-59 < 5.0 05-Mar-18 C0-60 < 2.3 05-Mar-18 ZN-65 < 1.6 05-Mar-18 ZR-NB-95 < 2.3 05-Mar-18 1-131 < 0.219 05-Mar-18 CS-134 < 2.6 05-Mar-18 CS-137 <* 3.2.

05-Mar-18 BA-LA-140 < 1.7 05-Mar-18 GROSS BETA 2.472 +/- 0.68 03-Apr-18 MN-54 < 2.2 03-Apr-18 C0-58 < 1.8 03-Apr-18 FE-59 < 6.3 03-Apr-18 C0-60 < 2.3 03-Apr-18 ZN-65 < 4.4 03-Apr-18 ZR-NB-95 < 3.8 03-Apr-18 1-131 < 0.277

• 03-Apr-18 CS-134 < 3.5 03-Apr-18 CS-137 < 2.7 03-Apr-18. BA-LA-140 < 2.7 03-Apr-18 GROSS BETA 2.678 +/- 0.6 03-May-18 MN-54 < 2.4 03-May-18 C0-58 < 2.9 03-May-18 FE-59 < 4.7 03-May-18 C0-60 < 1.9 03-May-18 ZN-65 < 4.7 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -49

Exposure Pathway - Waterborne Drinking Water Location: 10-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 03-May-18 ZR-NB-95 < 2.8 03-May-18 1-131 < 0.452 03-May-18 CS-134 < 3.1 03-May-18 CS-137 < 2.7 03-May-18 BA-LA-140 < 4.2 03-May-18 GROSS BETA 3.21;>0 +/- 0.71 05-Jun-18 MN-54 < 3.8 05-Jun-18 C0-58 < 3.0 05-Jun-18 FE-59 < 7.3 05-Jun-18 C0-60 < 4.1 05-Jun-18 ZN-65 < 4.2 05-Jun-18 ZR-NB-95 < 2.1 05-Jun-18 1-131 < 0.452 05-Jun-18 CS-134 < 4.4 05-Jun-18 CS-137 < 4.9 05-Jun-18 BA-LA-140 < 4.1 05-Jun-18 GROSS BETA 3.570 +/- 0.739 05-Jul-18 MN-54 < 2.9 05-Jul-18 C0-58 < 3.6 05-Jul-18 FE-59 < 4.3 05-Jul-18 C0-60 < 2.1 05-Jul-18 ZN-65 < 3.0 05-Jul-18 ZR-NB-95 < 3.1 05-Jul-18. 1-131 < 0.329 05-Jul-18* CS-134 < 3.6 05-Jul-18 CS-137 * < 2.1 05-Jul-18 BA-LA-140 < 1.7 05-Jul-18 GROSS BETA 2.811 +/- 0.695 09-Aug-18 MN-54 < 2.8 09-Aug-18 C0-58 < 2.5 09-Aug-18 FE-59 < 3.5 09-Aug-18 C0-60 < 1.8 09-Aug-18 ZN-65 < 2.0 09-Aug-18 ZR-NB-95 < 3.5 09-Aug-18 1-131 < 0.453 09-Aug-18 CS-134 < 3.8 09-Aug-18 CS-137 < 2.5 09-Aug-18 BA-LA-140 < 1.9 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 50

Exposure Pathway - Waterborne Drinking Water Location: 10-DW Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 09-Aug-18 GROSS BETA 2.844 +/- 0.699 04-Sep-18 MN-54 <* 2.1 04-Sep-18 C0-58 < 1.9 04-Sep-18 FE-59 < 6.2 04-Sep-18 C0-60 < 2.1 04-Sep-18 ZN-65 < 1.9 04-Sep-18 ZR-NB-95 < 2.2 04-Sep-18 1-131 < 0.388 04-Sep-18 CS-134 < 4.0 04-Sep-18 CS-137 < 3.0 04-Sep-18 BA-LA-140 < 1.6 04-Sep-18 GROSS BETA 2.604 +/- 0.677 04-0ct-18 MN-54 * < 2.3 04-0ct-18 C0-58 __ /

< 1.5 04-0ct-18 FE-59 < 2.9 04-0ct-18 C0-60 < 1.7 04-0ct-18 ZN~65 < 4.0 04-0ct-18 ZR-NB-95 < 2.0 04-0ct-18 1-131 < 0.432 04-0ct-18 CS-134 < 3.4 04-0ct-18 CS-137 < 3.0 04-0ct-18 BA-LA-140 < 3.1 04-0ct-18 GROSS BETA . 2.967 +/- 0.68 05-Nov-18 MN-54 < 3.0 05-Nciv-18 C0-58 < 2.3 05-Nov-18 FE-59 < 3.7 05-Nov-18 C0-60 < 1.2 05-Nov-18 ZN-65 < 5.2 05-Nov-18 ZR-NB-95 < 3.3 05-Nov-18 1-131 < 0.44 05-Nov-18 CS-134 < 2.8 05-Nov-18 CS-137 < 2.8 05-Nov-18 BA-LA-140 < 1.7 05-Nov-18 GROSS BETA 2.883 +/- 0.69 06-Dec-18 MN-54 < 2.2 06-Dec-18 C0-58 < 2.9 06-Dec-18 . FE-59 < 3.8 06-Dec-18 C0-60 *< 1.6 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 51

Exposure Pathway - Waterborne Drinking Water Location: 10-DW Nuclide Concentration Duplicate Collection (pCi/Liter) Analysis Date 06-Dec-18 ZN-65 < 2.9 06-Dec-18 *ZR-NB-95 < 2.8

• 06-Dec-18 1-131 < 0.463 06-Dec-18 CS-134 < 3.3 06-Dec-18 CS-137 < 2.6 06-Dec-18 BA-LA-140 < 1.6 06-Dec-18 GROSS BETA 2.714 +/- 0.71 07-Jan-19 MN-54 < 5.3 07-Jan-19 C0-58 < 3.2

. 07-Jan-19 FE-59 < 7.1 07-Jan-19 C0-60 < 3.9 07-Jan-19 ZN-65 < 8.0 07-Jan-19 ZR-NB-95 < 4.0 07-Jan-19 1-131 < 0.294 07-Jan-19 CS-134 < 4.9 07-Jan-19 CS-137 < 4.3 07-Jan-19 BA-LA-140 < 2.4 07-Jan-19 GROSS BETA 4.398 +/- 0.797 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C - 52

Exposure Pathway - Waterborne Drinking Water Quarterly Tritium Analysis Location: BW-15 Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 03-Apr-18 H-3 < 159 05-Jul-18 H-3 < 154 04-0ct-18 H-3 < 154 07-Jan-19 H-3 < 147 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -53

Exposure Pathway - Waterborne Drinking Water '

Quarterly Tritium Analysis Location: 10-DW Collection Nuclide Concentration Duplicate Date (pCi/Liter) Analysis 03-Apr-18 H-3 <. 159 03-Apr-18 H-3 < 159 Duplicate 05-Jul-18 H-3 < 154 04-0ct-18 H-3 252 +/- 86 04-0ct-18 H-3 343 +/- 90 07-Jan-19 H-3 < 147 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station Page C -54

Exposure Pathway - Waterborne Shoreline Sediment Location: DC Collection Sample Nuclide Concentration Duplicate

• Date Description * {pCi/Kg Dry) Analysis 08-May-1~ SHORELINE SEDIMENT K-40 6,813.5 +/- 592.8 08-May-18 SHORELINE SEDIMENT MN-54 < 14.5 08~~ay-18 SHORELINE SEDIMENT C0-58 < 25.5 08-May-18 SHORELINE SEDIMENT FE-59 < 54.4

. 08-May-18 SHORELINE SEDIMENT C0-60 < 22.2 08-May-18 SHORELINE SEDIMENT ZN-65 < 44.4 08-May-18 SHORELINE SEDIMENT CS-134 < 17.1 08-May-18 SHORELINE SEDIMENT CS-137 < 25.1

\

17-0ct-18 SHORELINE SEDIMENT K-40 6,842.7 +/- 591.8 17~0ct-18 SHORELINE SEDIMENT MN-54 < 21.7 17-0ct-18 SHORELINE SEDIMENT C0-58 < 33.3 17-0ct-18

• SHORELINE SEDIMENT FE-59 < 116.6 17-0ct-18 SHORELINE SEDIMENT C0-60 < 24.4 17-0ct-18 SHORELINE SEDIMENT ZN-65 < 87.2 17-0ct-18 SHORELINE SEDIMENT CS-134 < 24.8 17-0ct-18 SHORELINE SEDIMENT CS-137 < 29.6*

\ .

2018 Annual Radiological Environmental Operating Report Page C - 55 Wolf Creek Generating Station

Exposure Pathway - Waterborne Shoreline Sediment Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 09-May-18 SHORELINE SEDIMENT K-40 9,887.1 +/- 646.3 09-May-18 SHORELINE SEDIMENT MN-54 < 35.5 09-May-18 SHORELINE SEDIMENT C0-58 < 24.2 09-May-18 SHORELINE SEDIMENT FE-59 < 75.6 09-May-18 SHORELINE SEDIMENT C0-60 < 20.9 09-May-18 SHORELINE SEDIMENT ZN-65 < 60.4 09-May-18 SHORELINE SEDIMENT CS-134 < 23.0 09-May-18 SHORELINE SEDIMENT CS-137 < 18.3 29-Nov-18 SHORELINE SEDIMENT K-40 8,706.9 +/- 537.3 29-Nov-18 SHORELINE SEDIMENT MN-54 < 25.2 29-Nov-18 SHORELINE SEDIMENT C0-58 < 30.8 29-Nov-18 SHORELINE SEDIMENT FE-59 < 38.2 29-Nov-18 SHORELINE SEDIMENT C0-60 < 13.9 29-Nov-18 SHORELINE SEDIMENT ZN-65 < 46.8 29-Nov-18 SHORELINE SEDIMENT CS-134 < 16.1 29-Nov-18 SHORELINE SEDIMENT CS-137 < 16.7 2018 Annual Radiological Environmental Operating Report Page C - 56 WolfCreek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-May-18 CHANNEL CATFISH K-40 3,076.4 +/- 139.2 14-May-18* CHANNEL CATFISH MN-54 < 4.8 14-May-18 CHANNEL CATFISH C0-58 < 7.6 14-May-18 CHANNEL CATFISH FE-59 < 8.8 14-May-18 CHANNEL CATFISH C0-60 < 5.9 14-May-18 CHANNEL CATFISH ZN-65 < 12.9 14-May-18 CHANNEL CATFISH 1-131 < 50.0 (

14-May-18 CHANNEL CATFISH CS-134 < 4.9 14-May-18 CHANNEL CATFISH CS-137 < 4.9 14-May-18 CHANNEL CATFISH H-3 9,505.0 +/- 263.0 14-May-18 COMMON CARP K40 3,138.5 +/- 312.7 14-May-18 COMMON CARP MN-54, < 9.7 14-May-18 COMMON CARP C0-58 < 12.7 14-May-18 COMMON CARP FE-59 < 22.9 14-May-18 COMMON CARP C0-60 < 7.1 ,

14-May-18 COMMON CARP ZN-65 < 27.9 14-May-18 COMMON CARP 1-131 < 85.0 14-May-18 COMMON CARP CS-134 < 11.4

.14-May-18 COMMON CARP CS-137 < 13.4 14-May-18 COMMON CARP H-3 9,512.0 +/- 258.0 14-May-18 FRESHWATER DRUM K-40 2,714.2 +/- 335.4 Duplicate 14-May-18 FRESHWATER DRUM K-40 3,250.5 +/- 325.1 14-May-18 FRESHWATER DRUM MN-54 < 14.8 14-May-18 FRESHWATER DRUM MN-54 < 12.0 Duplicate 14-May-18 FRESHWATER DRUM C0-58 * < 11.6 Duplicate 14-May-18 FRESHWATER DRUM C0-58 < 14.4 14-May-18 FRESHWATER DRUM FE-59 < 25.6 Duplicate 14-May-18 FRESHWATER DRUM FE-59 < 31.9 14-May-18 FRESHWATER DRUM C0-60 < 4.3 14-May-18 FRESHWATER DRUM C0-60 < 10.4 Duplicate 14-May-18 FRESHWATER DRUM ZN-65 < 16.7 Duplicate 14-May-18 FRESHWATER DRUM ZN-65 . < 27.3 14-May-18 FRESHWATER DRUM 1-131 < 94.5 14-May-18 FRESHWATER DRUM 1-131 < 73.4 Duplicate 14-May-18 FRESHWATER DRUM CS-134 < 11.2 14-May-18 FRESHWATER DRUM CS-134 < 13.1 Duplicate 14-May-18 FRESHWATER DRUM CS-137 < 12.6 Duplicate 14-May-18 FRESHWATER DRUM CS-137 < 15.6 2018 Annual Radiological Environmental Operating Report Page C - 57 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-May-18 FRESHWATER DRUM H-3 9,808.0 +/- 263.0 Duplicate 14-May-18 FRESHWATER DRUM H-3 9,791.0 +/- 263.0 14-May-18 SMALLMOUTH BASS K-40 3,571.0 +/- 369.3 14-May-18 SMALLMOUTH BASS MN-54 < 15.4 14-May-18 SMALLMOUTH BASS C0-58 < 17.1 14-May-18 SMALLMOUTH BASS FE-59 < 24.2 14-May-18 SMALLMOUTH BASS C0-60 < 12.4 14-May-18 SMALLMOUTH BASS ZN-65 < 23.7 14-May-18. SMALLMOUTH BASS 1-131 < 99.3 14-May-18 SMALLMOUTH BASS CS-134 < 11.9 14-May-18 SMALLMOUTH BASS CS-137 < 16.5 14-May-18 SMALLMOUTH BASS H-3 9,409.0 +/- 263.0 14-May-18 SMALLMOUTH BUFFALO K-40 2,937.5 +/- 161.9

• 14-May-18 SMALLMOUTH BUFFALO MN-54 < 7.0 14-May-18 SMALLMOUTH BUFFALO C0-58 < 5.1 14-May-18 SMALLMOUTH BUFFALO FE-59 < 18.8 14-May-18 SMALLMOUTH BUFFALO C0-60 < 5.6 14-May-18 SMALLMOUTH BUFFALO ZN-65 < 10.3 14-May-18 SMALLMOUTH BUFFALO 1-131 < 48.6 14-May-18 SMALLMOUTH BUFFALO CS-134 < 6.4 14-May-18 SMALLMOUTH BUFFALO CS-137 < 4.9 14-May-18 SMALLMOUTH BUFFALO H-3 7,145.0 +/- 195.0 14-May-18 WHITE BASS K-40 3,429.3 +/- 189.0 14-May-18 WHITE BASS MN-54 < 6.3 14-May-18 WHITE BASS C0-58 < 8.0 14-May-18 WHITE BASS FE-59 < 20.0 14-May-18 WHITE BASS C0-60 < 3.7 14-May-18 WHITE BASS ZN-65 < 17.0 14-May-18 WHITE BASS 1-131 < 50.0 14-May-18 WHITE BASS CS-134 < 6.0 14-May-18 WHITE BASS CS-137 < 7.8 14-May-18 WHITE BASS* H-3 8,473.0 +/- 253.0 14-May-18 WIPER HYBRID K-40 3,543.3 +/- 186.9 14-May-18 WIPER HYBRID MN-54 < 5.4 14-May-18 WIPER HYBRID C0-58 < 8.3 14-May-18 WIPER HYBRID FE-59 < 17.4 14-May-18 WIPER HYBRID C0-60 < 6.6 14-May-18 WIPER HYBRID ZN-65 < 15.6 2018 Annual Radiological Environmental Operating Report Page C - 58 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 14-May-18 WIPER HYBRID 1-131 < 49.2 14-May-18 WIPER HYBRID ) CS-134 < 6.0 14-May-18 WIPER HYBRID CS-137 < 5.9 14-May-18 WIPER HYBRID H-3 9,021.0 +/- 253.0 25-0ct-18 BLUE CATFISH K-40 2,902'.2 +/- 322.3 25-0ct-18 BLUE CATFISH MN-54 < 13.0 25-0ct-18 BLUE CATFISH C0-58 < 9.0 25-0ct-18 BLUE CATFISH FE-59 < 27.6 25-0ct-18 BLUE CATFISH C0-60 < 7.0 25-0ct-18 BLUE CATFISH ZN-65 < 20.3 25-0ct-18 BLUE CATFISH 1-131 < 52.0 25-0ct-18 BLUE CATFISH CS-134 < 15.0 25-0ct-18 BLUE CATFISH CS-137 < 15.7 25-0ct-18 BLUE CATFISH H-3 6,858.0 +/- 226.0 25-0ct-18 CHANNEL CATFISH K-40 3,240.0 +/- 329.2 25-0ct-18 CHANNEL CATFISH MN-54 < 12.8 25-0ct-18 CHANNEL CATFISH C0-58 < 10.4 25-0ct-18 CHANNEL CATFISH FE-59 < 20.8 25-0ct-18 CHANNEL CATFISH C0-60 < 8.5 25-0ct-18 CHANNEL CATFISH ZN-65 < 9.9 25-0ct-18 CHANNEL CATFISH 1-131 < 58.8 25-0ct-18 CHANNEL CATFISH CS-134 < 10:3 25-0ct-18 CHANNEL CATFISH CS-137 < 13.2 25-0ct-18 CHANNEL CATFISH H-3 6,292.0 +/- 211.0 25-0ct-18 COMMON CARP K-40 2,647.5 +/- 316.8 25-0ct-18 COMMON CARP K-40 3,029.0 +/- 338.8 Duplicate 25-0ct-18 COMMON CARP MN-54 < 13.6 25-0ct~18 COMMON CARP MN-54 < 12.5 Dupli~ate 25-0ct-18 COMMON CARP C0-58 < 11.8 25-0ct-18 COMMON CARP C0-58 < 10.5 Duplicate 25-0ct-18 COMMON CARP FE-59 < 25.8 25-0ct-18 COMMON CARP FE-59 < 34.5 Duplicate 25-0ct-18 COMMON CARP C0-60 < 13.7 Duplicate (:

25-0ct-18 COMMON CARP C0-60 < 6.4 25-0ct-18 COMMON CARP ZN-65 < 29.1 *Duplicate 25-0ct-18 COMMON CARP ZN-65 < 27.6 25-0ct-18 COMMON CARP 1-131 < 54.3 Duplicate 25-0ct-18 COMMON CARP 1-131 < 61.4 2018 Annual Radiological Environmental Operating Report Page C - 59 Wolf Creek Generating Station

• Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 25-0ct-18 COMMON CARP CS-134 < 11.8 25-0ct-18 COMMON CARP CS-134 < 13.5 Duplicate 25-0ct-18 COMMON CARP CS-137 < 10.6 25-0ct-18 COMMON CARP CS-137 < 11.3 Duplicate 25-0ct-18 COMMON CARP H-3 6,332.0 +/- 212.0 Duplicate 25-0ct-18 COMMON CARP H-3 6,116.0 +/- 209.0 25-0ct-18 CRAPPIE K-40 3,841.0 +/- 398.2 25-0ct-18 CRAPPIE MN-54 < 10.1 25-0ct-18 CRAPPIE C0-58 < 15.0 25-0ct-18 CRAPPIE FE-59 < 41.7 25-0ct-18 CRAPPIE C0-60 < 10.4 25-0ct-18 CRAPPIE ZN-65 < 23.2 25-0ct-18 CRAPPIE 1-131 <. 53.5 25-0ct-18 CRAPPIE CS-134 < 14.2 (

25-0ct-18 CRAPPIE CS-137 < 19.9 25-0ct-18 CRAPPIE H-3 6,236.0 +/- 211.0 25-0ct-18 SMALLMOUTH BUFFALO K-40 3,019.7 +/- 363.9 25-0ct-18 SMALLMOUTH BUFFALO MN-54 < 9.7 25-0ct-18 SMALLMOUTH BUFFALO C0-58 < 10.6 25-0ct-18 SMALLMOUTH BUFFALO FE-59 < 16.3 25-0ct-18 SMALLMOUTH BUFFALO C0-60 < 10.7 25-0ct-18 SMALLMOUTH BUFFALO ZN-65 < 18.2 25-0ct-18 SMALLMOUTH BUFFALO 1-131 < 52.5 25-0ct-18 SMALLMOUTH BUFFALO CS-134 < 11.5 25-0ct-18 SMALLMOUTH BUFFALO CS-137 < 13.1 25-0ct-18 SMALLMOUTH BUFFALO H-3 5,702.0 +/- 196.0 25-0ct-18 WALLEYE K-40 3,483.2 +/- 347.9 25-0ct-18 WALLEYE MN-54 < 11.2 25-0ct-18 WALLEYE C0-58 < 9.6 25-0ct-18 WALLEYE FE-59 < 19.9 25-0ct-18 WALLEYE C0-60 < 8.4 25-0ct-18 WALLEYE ZN-65 < 29.7 25-0ct-18 WALLEYE 1-131 < 65.3 25-0ct-18 WALLEYE CS-134 < 14.4 25-0ct-18 WALLEYE CS-137 < 15.9 25-0ct-18 WALLEYE H-3 5,533.0 +/- 204.0 25-0ct-18 WHITE BASS K-40 3,003.2 +/- 356.4 25-0ct-18 WHITE BASS MN-54 < 13.5 2018 Annual Radiological Environmental Operating.Report Page C - 60 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: CCL Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 25-0ct-18 WHITE BASS C0-58 < 16.3 25-0ct-18 WHITE BASS FE-59 < 18.6 25-0ct-18 WHITE BASS C0-60 < 10.9 25-0ct-18 WHITE BASS *zN-65 < 26.0 25-0ct-18 WHITE BASS 1-131 < 60.2 25-0ct-18 WHITE BASS CS-134 < 13.7

• 25-0ct-18 WHITE BASS CS-137 < 11.4 25-0ct-18 WHITE BASS* H-3 5,045.0 +/- 189.0 2018 Annual Radiological Environmental Operating Report Page C - 61 Wolf Creek Generating Station

Exposure Pathway

• Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 11-Apr-18 BASS K-40 3,963.3 +/- 430.2 11-Apr-18 BASS MN-54 < 18.2 11-Apr-18 BASS C0-58 < 13.6 11-Apr-18 BASS FE-59 < 19.7 11-Apr-18 BASS C0-60 < 11.7 11-Apr-18 BAss* ZN-65 < 18.6 11-Apr-18 BASS 1-131 < 44.8 11-Apr-18 BASS CS-134 < 14.5 11-Apr-18 BASS CS-137 < 10.3 11-Apr-18 BASS H-3 < 119.0 11-Apr-18 BIGMOUTH BUFFALO K-40 2,944.8 +/- 376.5

• 11-Apr-18 BIGMOUTH BUFFALO MN-54 < 13.4 11-Apr-18 BIGMOUTH BUFFALO C0-58 < 9.4 11-Apr-18 BIGMOUTH BUFFALO FE-59 < 25.9 11-Apr-18 BIGMOUTH BUFFALO C0-60 < 10.9 11-Apr-18 BIGMOUTH BUFFALO ZN-65 < 30.9 11-Apr-18 BIGMOUTH BUFFALO 1-131 < 36.0 11-Apr-18 BIGMOUTH BUFFALO CS-134 < 15.7 11-Apr-18 BIGMOUTH BUFFALO CS-137 < 13.8 11-Apr-18 BIGMOUTH BUFFALO H-3 < 110.0 11-Apr-18 COMMON CARP K-40 3,609.7 +/- 410.3 11-Apr-18 COMMON CARP MN-54 < 10.8 11-Apr-18 COMMON CARP C0-58 < 8.7 11-Apr-18 COMMON *CARP FE-59 < 27.6 11-Apr-18 COMMON CARP C0-60 < 12.2 11-Apr-18 COMMON CARP ZN-65 < 34.1 11-Apr-18 COMMON CARP 1-131 < 41.8 11-Apr-18 COMMON CARP CS-134 < 15.8 11-Apr-18 COMMON CARP CS-137 < 16.1 11-Apr-18 COMMON CARP H-3 < 115.0 11-Apr-18 RIVER CARPSUCKER K-40 3,394.7 +/- 423.6 11-Apr-18 RIVER CARPSUCKER MN-54 < 13.3 11-Apr-18 RIVER CARPSUCKER C0-58 < 10.2 11-Apr-18 RIVER CARPSUCKER FE-59 < 31.0 11-Apr-18 RIVER CARPSUCKER C0-60 < 10.0 11-Apr-18 RIVER CARPSUCKER ZN-65 < 17.3 11-Apr-18 RIVER CARPSUCKER 1-131 < 47.4 11-Apr-18 RIVER CARPSUCKER CS-134 < 15.2 2018 Annual Radiological Environmental Operating Report Page C

• 62 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide

• Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 11-Apr-18 RIVER CARPSUCKER CS-137 < 12.5 11-Apr-18 RIVER CARPSUCKER H-3 < 116.0 11-Apr-18 SMALLMOUTH BUFFALO K-40 3,191.5 +/- 414.2 11-Apr-18 SMALLMOUTH BUFFALO MN-54 < 12.6 .

11-Apr-18 SMALLMOUTH BUFFALO C0-58 < 10.5 11-Apr-18 SMALLMOUTH BUFFALO FE-59 < 39.3 11-Apr-18 SMALLMOUTH BUFFALO C0-60 < 14.5 11-Apr-18 SMALLMOUTH BUFFALO ZN-65 < 19.3 11-Apr-18 SMALLMOUTH BUFFALO 1-131 < 41.4 11-Apr-18 SMALLMOUTH BUFFALO CS-134 < 14.2 11-Apr-18 SMALLMOUTH BUFFALO CS-137 < 20.4 11-Apr-18 SMALLMOUTH BUFFALO H-3 < 113.0 18-0ct-18 BIGMOUTH BUFFALO K-40 2,903.2 +/- 232.2 18-0ct-18 BIGMOUTH BUFFALO MN-54 < 10.7 18-0ct-18 BIGMOUTH BUFFALO C0-58 < 8.7 18-0ct-18 BIGMOUTH BUFFALO FE-59 < 21.0

• 18-0ct-18 BIGMOUTH BUFFALO C0-60 < 5.3 18-0ct-18 BIGMOUTH BUFFALO ZN-65 < 10.8 18-0ct-18 BIGMOUTH BUFFALO 1-131 < 48.5 18-0ct-18 BIGMOUTH BUFFALO CS-134 < 7.9 18-0ct-18 BIGMOUTH BUFFALO CS-137 < 5.5 18-0ct-18 BIGMOUTH BUFFALO H-3 < 120.0 18-0ct-18 CHANNEL CATFISH K-40 3,378.8 +/- 253.2 18-0ct-18 CHANNEL CATFISH MN-54 < 8.3 18-0ct-18 CHANNEL CATFISH C0-58 < 11.0 18-0ct-18 CHANNEL CATFISH FE-59 <* 23.3 18-0ct-18 CHANNEL CATFISH C0-60 < 5.7 18-0ct-18 . CHANNEL CATFISH ZN-65 < 21.1 18.:oct-18 CHANNEL CATFISH 1-131 < 58.9 18-0ct-18 CHANNEL CATFISH CS-134 < 9.7 18-0ct-18 CHANNEL CATFISH CS-137 < 8.2 18-0ct-18 CHANNEL CATFISH H-3 < 123.0 18-0ct-18 COMMON CARP K-40 3,089.2 +/- 280.9 18-0ct-18 COMMON CARP MN-54 < 7.4 18-0ct-18 COMMON CARP C0-58 < 7.5 18-0ct-18 COMMON CARP FE-59 < 14.5 18-0ct-18 COMMON CARP C0-60 < 4.0 18-0ct-18 COMMON CARP ZN-65. < 9.5 2018 Annual Radiological Environmental Operating Report Page C - 63 Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 18-0ct-18 COMMON CARP 1-131 < 75.4 18-0ct-18 COMMON CARP CS-134 < 9.4 1~-0ct-18 COMMON CARP CS-137 < 11.1 18-0ct-18

• COMMON CARP H-3 < 120.0 18-0ct-18 CRAPPIE K-40 3,555.4 +/- 305.3 18-0ct-18 CRAPPIE MN-54 < 13.5 18-0ct-18 CRAPPIE C0-58 < 10.2 18-0ct-18 CRAPPIE FE-59 < 31.8 18-0ct-18 CRAPPIE C0-60 .< 9.7 18-0ct-18 CRAPPIE ZN-65 < 17.0 18-0ct-18 CRAPPIE 1-131 < 72.1 18-0ct-18 CRAPPIE CS-134 < 12.1 18-0ct-18 CRAPPIE CS-137 < 9.3 18-0ct-18 CRAPPIE H-3 < 122.0 18-0ct-18 FLATHEAD CATFISH K-40 3,321.7 +/- 325.8 18-0ct-18 FLATHEAD CATFISH MN-54 < 12.4 18-0ct-18 FLATHEAD CATFISH C0-58 < 13.1 18-0ct-18 FLATHEAD CATFISH FE-59 < 36.8 18-0ct-18 FLATHEAD CATFISH C0-60 < 7.9 18-0ct-18 FLATHEAD CATFISH ZN-65 < 17.4 18-0ct-18 FLATHEAD CATFISH 1-131 < 82.3 18-0ct-18 FLATHEAD CATFISH CS-134 < 14.5 18-0ct-18 FLATHEAD CATFISH CS-137 < 13.9 18-0ct-18 FLATHEAD CATFISH H-3 < 123.0 18-0ct-18 GRASS CARP K-40 3,123.3 +/- 251.3 18-0ct-18 GRASS CAR.P MN-54 < 11.8 18-0ct-18 GRASS CARP C0-58 < 11.8 18-0ct-18 GRASS CARP FE-59 < 20.3 18-0ct-18 GRASS CARP C0-60 < 6.3 18-0ct-18 GRASS CARP ZN-65 < 22.4 18-0ct-18 GRASS CARP 1-131 < 64.8 18-0ct-18 GRASS CARP CS-134 < 12.2 18-0ct-18 GRASS CARP CS-137 < 7.1 18-0ct-18 GRASS CARP H-3 < 118.0 18-0ct-18 LARGEMOUTH BASS K-40 3,545.2 +I~ 323.1 18-0ct-18 LARGEMOUTH BASS MN-54 < 9.0 18-0ct-18 LARGEMOUTH BASS *co-58 < 10.9 18-0ct-18 LARGEMOUTH BASS FE-59 < 17.6 I 2018 Annual Radiological Environmental Operating Report_

Page C - 64

. Wolf Creek Generating Station

Exposure Pathway - Ingestion Fish Location: JRR Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) *Analysis 18-0ct-18 LARGEMOUTH BASS C0-60 < 10.2 18-0ct-18 LARGEMOUTH BASS ZN-65 < 20.0 18-0ct-18 LARGEMOUTH BASS 1-131 < 51.5.

18-0ct-18 LARGEMOUTH BASS CS-134 < 11.6 18-0ct-18 LARGEMOUTH BASS CS-137 < 10.5 18-0ct-18 LARGEMOUTH BASS H-3 < 122.0 18-0ct-18 SMALLMOUTH BUFFALO K-40 2,599.9 +/- 293.2 18-0ct-18 SMALLMOUTH BUFFALO MN-54 < 10.4 18-0ct-18 SMALLMOUTH BUFFALO C0-58 < 8.8 18-0ct-18 SMALLMOUTH BUFFALO FE-59 < 21.1 18-0ct-18 SMALLMOUTH BUFFALO C0-60 < 9.1 1a-oct-1a SMALLMOUTH BUFFALO ZN-65 < 10.5 18-0ct-18 SMALLMOUTH BUFFALO 1-131 < 59.1 18-0ct-18 SMALLMOUTH BUFFALO CS-134 < 10.0 18-0ct-18 SMALLMOUTH BUFFALO CS-137 < 10.6 18-0ct-18 SMALLMOUTH BUFFALO H-3 < 131.0 18-0ct-18 WHITE BASS K-40 3,275.9 +/- 246.5 18-0ct-18 WHITE BASS MN-54 < 9.7 18-0ct-18 WHITE BASS C0-58 < 10.0 18-0ct-18 WHITE BASS FE-59 < 28.1 18-0ct-18 WHITE BASS C0-60 < 7.1 18-0ct-18 WHITE BASS ZN-65 < 1~.2 18-0ct-18 WHITE BASS 1-131 < 58.4 18-0ct-18 WHITE BASS CS-134 < 8.7 18-0ct-18

• WHITE BASS CS-137 < 6.2 18-0ct-18* WHITE BASS f:1-3 < 120.0 2018 Annual Radiological Environmental Operating Report Page C - 65 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: A-3 Collection Sample Nuclide Concentration . Duplicate Date Description (pCi/Kg Wet) Analysis 17-May-18 HORSERADISH LEAVES BE-7 1,357.3 +/- 287.4 17-May-18 HORSERADISH LEAVES BE-7 1,271.6- +/- 220.5 Duplicate 17-May-18 HORSERADISH LEAVES K-40 6,145.1 +/- 597.6 Duplicate 17-May-18 HORSERADISH LEAVES K-40 6,562.1 +/- 564.7 17-May-18 HORSERADISH LEAVES MN-54 < 15.6 17-May-18 HORSERADISH LEAVES MN-54 < 19.8 Duplicate 'l 17-May-18 HORSERADISH LEAVES C0-58 < 15.7 Duplicate 17-May-18 HORSERADISH LEAVES C0-58 < 17.2 17-May-18 HORSERADISH LEAVES FE-59 < 34.1 Duplicate 17-May-18 HORSERADISH LEAVES FE-59 < 35.0 17-May-18 HORSERADISH LEAVES C0-60 < 1Ci.7 Duplicate 17-May-18 HORSERADISH LEAVES C0-60 < 15.9 17-May-18 HORSERADISH LEAVES ZN-65 < 48.0 17-May-18 HORSERADISH LEAVES ZN-65 < 34.4 Duplicate 17-May-18 HORSERADISH LEAVES ZR-NB-95 <* 12.0

• 17-May-18 HORSERADISH LEAVES ZR-NB-95 < 24.1 Duplicate 17-May-18 HORSERADISH LEAVES 1-131 < 57.4 17-May-18 HORSERADISH LEAVES 1-131 < 52.9 Duplicate 17-May-18 HORSERADISH LEAVES CS-134 < 19.4. Duplicate 17-May-18 HORSERADISH LEAVES CS-134 < 15.4 17-May-18 HORSERADISH LEAVES CS-137 < 20.4 17-May-18 HORSERADISH LEAVES CS-137 < 20.8 Duplicate 01-0ct-18 HORSERADISH LEAVES BE-7 300.8 +/- 104.4

.01-0ct~18 HORSERADISH LEAVES K-40 4,494.8 +/- 377.5 01-0ct-18 HORSERADISH LEAVES MN-54 < 8.8 01-0ct-18 HORSERADISH LEAVES C0-58 < 6.8 01-0ct-18 HORSERADISH LEAVES FE-59 < 21.3 01-0ct-18 HORSERADISH LEAVES C0-60 < 10.2 01-0ct--18 HORSERADISH LEAVES ZN-65 < 36.8 01-0ct-18 HORSERADISH LEAVES ZR-NB-95 < 9.0 01-0ct-18 HORSERADISH LEAVES 1-131 < 20.6 01-0ct-18 HORSERADISH LEAVES CS-134 < 13.6 01-0ct-18 HORSERADISH LEAVES CS-137 < 11.5 2018 Annual Radiological Environmental Operating Report Page C - 66 Wolf Creek Generating Station

Exposure pathway - Ingestion Food/Garden Location: 8-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 17-May-18 HORSERADISH LEAVES BE-7 1,383.5 +/- 202.7 17-May-18 HORSERADISH LEAVES K-40 6,958.6 +/- 438.5 17-May-18 HORSERADISH LEAVES MN-54 < 12.6 17-May-18 HORSERADISH LEAVES C0-58 < 15.2 17-May~18 HORSERADISH LEAVES FE-59 < 18.6 17-May-18 HORSERADISH LEAVES C0-60 < 14.6 17-May-18 HORSERADISH LEAVES ZN-65 < 30.8 17-May-18 HORSERADISH LEAVES ZR-NB-95 < 15.0 17-May-18 HORSERADISH LEAVES 1-131 < 26.6 17-May-18 HORSERADISH LEAVES CS-134 < 12.1 17-May-18 HORSERADISH LEAVES CS-137 < 13.1 14-Jun-18 HORSERADISH LEAVES BE-7 916.1 +/- 191.8 14-Jun-18 HORSERADISH LEAVES K-40 6,580.4 +/- 496.4 14-Jun-18 HORSERADISH LEAVES MN-54 < 15.1 14-Jun-18 HORSERADISH LEAVES C0-58 < 15.3 14-Jun-18 HORSERADISH LEAVES FE-59 < 17.4 14-Jun-18 HORSERADISH LEAVES C0-60 < 7.8 14-Jun-18 HORSERADISH LEAVES ZN-65 < 15.7 14-Jun-18 HORSERADISH "LEAVES ZR-NB-95 < 15.0 14-Jun-18 HORSERADISH LEAVES 1-131 < 31.9 14-Jun-18 HORSERADISH LEAVES CS-134 < 11.3 14-Jun-18 HORSERADISH LEAVES CS-137 < 13.7 30-Jul-18 HORSERADISH LEAVES BE-7 655.5 +/- 194.5 30-Jul-18 HORSERADISH LEAVES . K-40 4,274.1 +/- 421.6 30-Jul-18 HORSERADISH LEAVES MN-54 < 12.6 30-Jul-18 HORSERADISH LEAVES C0-58 < 13.1 30-Jul-18 HORSERADISH LEAVES FE-59 < 16.7 30-Jul-18 HORSERADISH LEAVES C0-60 < 4.3 30-Jul-18 HORSERADISH LEAVES ZN-65. < 19.7 30-Jul-18 HORSERADISH LEAVES ZR-NB-95 < 14.1 30-Jul-18 HORSERADISH LEAVES 1-131 < 37.2 30-Jul-18 HORSERADISH LEAVES CS-134 < 13.9 30-Jul-18 . HORSERADISH LEAVES CS-137 < 14.2 13-Aug-18 HORSERADISH LEAVES BE-7 576.1 +/- 170..1 13-Aug-18 HORSERADISH LEAVES K-40 5,341.8 +/- 433.2 13-Aug-18 HORSERADISH LEAVES MN-54 < 12.2 13-Aug-18 HORSERADISH LEAVES C0-58 < 7.7 13~Aug-18 HORSERADISH LEAVES FE-59 < 17.9 2018 Annual Radiological Environmental Operating Report Page C - 67 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: B-1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 13-Aug-18 HORSERADISH LEAVES C0-60 <* 11.3

.13-Aug-18 HORSERADISH LEAVES ZN-65 < 30.9 13-Aug-18 HORSERADISH LEAVES ZR-NB-95 < 16.4 13-Aug-18 HORSERADISH LEAVES 1-131 < 25.9 13-Aug-18 HORSERADISH LEAVES CS-134 < 13.5 13-Aug-18 HORSERADISH LEAVES CS-137 < 10.5 10-Sep-18 HORSERADISH LEAVES BE-7 793.9 +/- 218.5 10-Sep-1~ HORSERADISH LEAVES K-40 4,539.3 +/- 489.1 10-Sep-18 HORSERADISH LEAVES MN-54 < 20.2 10-Sep-18 HORSERADISH LEAVES C0-58 < 16.4 10-Sep-18 HORSERADISH LEAVES FE-59 < 31.4 10-Sep-18 HORSERADISH LEAVES C0-60 < 9.0 I

10-Sep-18 HORSERADISH LEAVES ZN-65 < 41.5 10-Sep-18 HORSERADISH LEAVES ZR-NB-95 < 18.9 10-Sep-18 HORSERADISH LEAVES 1-131 < 45.1 10-Sep-18 HORSERADISH LEAVES CS-134 < 18.0 10-Sep-18 HORSERADISH LEAVES CS-137 < 17.9 01-0ct-18 HORSERADISH LEAVES BE-7 261.6 +/- 76.5 0-1-0ct-18 HORSERADISH LEAVES K-40 4,943.6 +/- 203.9 01-0ct-18 HORSERADISH LEAVES MN-54 < 7.8 01-0ct-18 HORSERADISH LEAVES C0-58 < 5.6 01-0ct-18 HORSERADISH LEAVES FE-59 < 16.1 01~0ct-18 HORSERADISH LEAVES C0-60 < 5.7 01-0ct-18 HORSERADISH LEAVES ZN-65 < 15.0 01-0ct-18 HORSERADISH LEAVES ZR-NB-95 < 5.0 01-0ct-18 HORSERADISH LEAVES 1-131 < 18.9 01-0ct-18 HORSERADISH LEAVES CS-134 < 6.6 01-0ct-18 HORSERADISH LEAVES ~S-137 < 7.1 2018 Annual Radiological Environmental Operating Report Page C - 68 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 17-May-18 HORSERADISH LEAVES BE-7 1,010.6 +/- 177.0 17-May-18 HORSERADISH LEAVES K-40 6,340.5 +/- 425.5 17-May-18 HORSERADISH LEAVES MN-54 < 12.4 17-May-18 HORSERADISH LEAVES C0-58 < 15.0 17-May-18 HORSERADISH LEAVES FE-59 < 24,8 17-May-18 HORSERADISH LEAVES C0-60 < 12.1 17-May-18 HORSERADISH LEAVES ZN-65 < 14.8 17-May-18 HORSERADISH LEAVES ZR-NB-95 < 13.9 17-May-18 HORSERADISH LEAVES 1-131 < 38.3 17-May-18 HORSERADISH LEAVES CS-134 < 12.0 17-May-18 HORSERADISH LEAVES CS-137 < 15.1 14-Jun-18 HORSERADISH LEAVES BE-7 1,286.9 +/- 213.3 14-Jun-18 HORSERADISH LEAVES K-40 6,594.8 +/- 431.4 14-Jun-18 HORSERADISH LEAVES MN-54 < 13.1 14-Jun-18 HORSERADISH LEAVES C0-58 < 7.1 14-Jun-18 HORSERADISH LEAVES . FE-59 < 35.2 14-Jun-18 HORSERADISH LEAVES C0-60 < 11.7 14-Jun-18 HORSERADISH LEAVES ZN-65 < 19.6 14-Jun-18 HORSERADISH LEAVES ZR-NB-95 < 11.0 14-Jun-18 HORSERADISH LEAVES 1-131 < 53.2 14-Jun-18 HORSERADISH LEAVES CS-134 < 13.3 14-Jun-18 HORSERADISH LEAVES CS-137 < 8.4 30-Jul-18 HORSERADISH LEAVES BE-7 966.2 +/- 180.5 30-Jul-18 HORSERADISH LEAVES K-40 4,849.4 +/- 427.8 30-Jul-18 HORSERADISH LEAVES MN-54 < 12.8 30-Jul-18 HORSERADISH LEAVES C0-58 < 11.1 30-Jul-18 HORSERADISH LEAVES FE-59 < 16.8 30-Jul-18 HORSERADISH LEAVES C0-60 < 15.0 30-Jul-18 HORSERADISH LEAVES ZN-65 < 21.1 30-Jul-18 HORSERADISH LEAVES ZR-NB-95 < 8.2 30-Jul-18 HORSERADISH LEAVES 1-131 < 31.8 30-Jul-18 HORSERADISH LEAVES CS-134 < 15.5 30-Jul-18 HORSERADISH LEAVES CS-137 < 8.8 13-Aug-18 HORSERADISH LEAVES BE-7 869.8 +/- 193.9 13-Aug-18 HORSERADISH LEAVES K-40 5,421.6 +/- 445.4 13-Aug-18 HORSERADISH LEAVES MN-54 < 8.7 13-Aug-18 HORSERADISH LEAVES C0-58 < 9.7 13-Aug-18 HORSERADISH LEAVES FE-59 < 21.1 2018 Annual Radiological Environmental Operating Report Page C - 69 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: D-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 13-Aug..:18 HORSERADISH LEAVES C0-60 < 10.2 13-Aug-18 HORSERADISH LEAVES ZN-65 < 11.0 13-Aug-18 HORSERADISH LEAVES ZR-NB-95 < 15.2 13-Aug-18 HORSERADISH LEAVES 1-131 < 34.0 13-Aug-18 HORSERADISH LEAVES CS-~34 < 14.7 13-Aug-18 HORSERADISH LEAVES CS-137 < 10.5 10-Sep-18 HORSERADISH LEAVES BE-7 613.6 +/- 252.7 10-Sep-18 HORSERADISH LEAVES K-40 4,734.2 +/- 471.3 1o~sep-18 HORSERADISH LEAVES MN-54 < 15.6 10-Sep-18 HORSERADISH LEAVES C0-58 <* 14.4 10-Sep-18 HORSERADISH LEAVES FE-59 < 33.2 10-Sep-18 HORSERADISH LEAVES C0-60 < 10.1 10-Sep-18 HORSERADISH LEAVES ZN-65 < 30.2 10-Sep-18 HORSERADISH LEAVES ZR-NB-95 < 9.6 10-Sep-18 HORSERADISH LEAVES 1-131 < 28.2 10-Sep-18 HORSERADISH LEAVES CS-134 < 17.5 10-Sep-18 HORSERADISH LEAVES CS-137 < 15.9 01-0ct-18 HORSERADISH LEAVES BE-7 227.2 +/- 66.1 01-0ct-18 HORSERADISH LEAVES K-40 5,540.8 +/- 185.6 01-0ct-18 HORSERADISH LEAVES MN-54 < 5.4 01-0ct-18 HORSERADISH LEAVES . C0-58 < 6.8 01-0ct-18 HORSERADISH LEAVES FE-59 < 15.3 01-0ct-18 HORSERADISH LEAVES C0-60 <* 6.9 01-0ct-18 HORSERADISH LEAVES ZN-65 < 12.8 Oj-Oct-18 HORSERADISH LEAVES ZR-NB-95 < 8.2 01-0ct-18 HORSERADISH LEAVES 1-131 < 13.9 01-0ct-18 HORSERADISH LEAVES CS-134 < 7.1 01-0ct-18

• HORSERADISH LEAVES CS-137 < 8.1 2018 Annual Radiological Environmental Operating Report Page C - 70 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 17-May-18 HORSERADISH .LEAVES BE-7 1,227.8 +/- 251.2 17-May-18 HORSERADISH LEAVES K-40 6,196.2 +/-

• 473.1 17-May-18 HORSERADISH LEAVES MN-54 < 14.2 17-May-18 HORSERADISH LEAVES C0-58 < 16.8

• 17-May-18 HORSERADISH LEAVES FE-59 < 41.5 17-May-18 HORSERADISH LEAVES C0-60 < 18.7 17-May-18 HORSERADISH LEAVES ZN-65 < 33.2 17-May-18 HORSERADISH LEAVES ZR-NB-95 < 12.2 17-May-18 HORSERADISH LEAVES 1-131 < 35.4 17-May-18 HORSERADISH LEAVES CS-134 < 16.7 17-May-18 HORSERADISH LEAVES CS-137 < 16.5 14-Jun-18 HORSERADISH LEAVES BE-7 1,409.3 +/- 194.8 14-Jun-18 HORSERADISH LEAVES K-40 6,429.1 +/- 457.7 14-Jun-18 HORSERADISH LEAVES MN-54 < 14.1 14-Jun-18 HORSERADISH LEAVES C0-58 < 16.5 14-Jun-18 HORSERADISH LEAVES FE-59 < 23.1 14-Jun-18 HORSERADISH LEAVES C0-60 '< 8.8 14-Jun-18 HORSERADISH LEAVES ZN-65 < 27.9 14-Jun-18 HORSERADISH LEAVES ZR-NB-95 < 21.5 14-Jun-18 HORSERADISH LEAVES 1-131 < 55.8 14-Jun-18 HORSERADISH LEAVES CS-134 < 12.9 14-Jun-18 HORSERADISH LEAVES CS-137 < 12.4 30-Jul-18 HORSERADISH LEAVES BE-7 646.2 +/- 143.0 30-Jul-18 HORSERADISH LEAVES K-40 3,998.5 +/- 350.0 30-Jul-18 HORSERADISH LEAVES MN-54 < 12.2 30-Jul-18 HORSERADISH LEAVES C0-58 < 10.9 30-Jul-18 HORSERADISH LEAVES FE-59 < 19.9 30-Jul-18 HORSERADISH LEAVES C0-60 < 9.6 30-Jul-18 HORSERADISH LEAVES ZN-65 < 19.6 30-Jul-18 HORSERADISH LEAVES ZR-NB-95 < 12.0 30-Jul-18 HORSERADISH LEAVES 1-131 < 28.4 30-Jul-18 HORSERADISH LEAVES CS-134 < 11.8 30-Jul-18 HORSERADISH LEAVES CS-137 < 14.3 13-Aug-18 HORSERADISH LEAVES BE-7 344.5 +/- 115.9 13-Aug-18 HORSERADISH LEAVES K-40 5,893.5 +/- 383.8 13-Aug-18 HORSERADISH LEAVES MN-54 < 10.9 13-Aug-18 HORSERADISH LEAVES C0-58 < 7.4 13-Aug-18 HORSERADISH LEAVES FE-59 < 22.4 2018 Annual Radiological Environmental Operating Report Page C - 71 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: H-2 Collection Sample Nuclide Concentration Duplicate Date Description *. (pCi/Kg Wet) Analysis 13~Aug-18 HORSERADISH LEAVES C0-60 < 11.6 13-Aug-18 HORSERADISH LEAVES ZN-65 < 12.7 13-Aug-18 HORSERADISH LEAVES ZR-NB-95 < 9.5 13-Aug-18 -HORSERADISH LEAVES 1-131 < 18.4 13-Aug-18 HORSERADISH LEAVES CS-134 < 9.9 13-Aug-18 HORSERADISH LEAVES CS-137 < 12.0 10-Sep-18 HORSERADISH LEAVES BE-7 496.7 +/- 134.3 10-Sep-18 HORSERADISH LEAVES K-40 4,054.7 +/- 380.8 10-Sep-18 HORSERADISH LEAVES MN-54 < 9.7 10-Sep-18 HORSERADISH LEAVES C0-58 < 9.6 10-Sep-18 HORSERADISH LEAVES FE-59 < 25.3 10-Sep-18 HORSERADISH LEAVES C0-60 < 9.3 10-Sep-18 HORSERADISH LEAVES ZN-65 < 25.7 10-Sep-18 HORSERADISH LEAVES ZR-NB-95 < 9.8 10-Sep-18 HORSERADISH LEAVES 1-131 < 21.5 10-Sep-18 HORSERADISH LEAVES CS-134 < 12.8 10-Sep-18 HORSERADISH LEAVES CS-137 < 14.0 01-0ct-18 HORSERADISH LEAVES BE-7 137.2 +/- 53.6 01-0ct-18 HORSERADISH LEAVES* K-40 3,505.0 +/- 136.8 01~oct-18 HORSERADISH LEAVES MN-54. < 5.6 01-0ct-18 HORSERADISH LEAVES C0-58 < 4.7 01-0ct-18 HORSERADISH LEAVES FE-59 < 9.6 01-0ct-18 HORSERADISH LEAVES C0-60 < 4'.9 01-0ct-18 HORSERADISH LEAVES ZN-65 < 9.5 01-0ct-18 HORSERADISH LEAVES ZR-NB-95 < 4.3 01-0ct-18 HORSERADISH LEAVES 1-131 < 7.8 01-0ct-18 HORSERADISH LEAVES CS-134 < 4.7 01-0ct-18 HORSERADISH LEAVES CS-137 < 5.7 2018 Annual Radiological Environmental Operating Report Page C - 72 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 17-May-18 HORSERADISH LEAVES BE-7 1,012.4 +/- 207.1 17-May-18 HORSERADISH LEAVES K-40 5,485.4 +/- 459.1 17-May-18 HORSERADISH LEAVES MN-54 < 16.6 17-May-18 HORSERADISH LEAVE$ C0-58 < 10.0 17~May-18 HORSERADISH LEAVES FE-59 < 23.7 17-May-18 , HORSERADISH LEAVES C0-60 < 11.9 17-May-18 HORSERADISH LEAVES ZN-65 < 32.2 17-May-18 HORSERADISH LEAVES ZR-NB-95 < 19.1 17-May-18 HORSERADISH LEAVES 1-131 < 31.3 17-May-18 HORSERADISH LEAVES CS-134 < 12.9 17-May-18 HORSERADISH LEAVES CS-137 < 12.3 14-Jun-18 HORSERADISH LEAVES BE-7 801.3 +/- 167.6 14-Jun-18 HORSERADISH LEAVES K-40 5,629.3 +/-. 3'95_1 14-Jun-18 HORSERADISH LEAVES MN-54 < 13.2 14-Jun-18 . HORSERADISH LEAVES C0-58 < 14.0 14-Jun-18 HORSERADISH LEAVES FE-59 < 34.7 14-Jun-18 HORSERADISH LEAVES C0-60 < 12.5 14-Jun-18 HORSERADISH LEAVES ZN-65 < 17.3 fb 14-Jun-18 HORSERADISH LEAVES ZR-NB-95 < 12.6 14-Jun-18 HORSERADISH LEAVES 1-131 < 30.9 14-Jun-18. HORSERADISH LEAVES CS-134 < 10.2 14-Jun-18 HORSERADISH LEAVES 9S-137 < 13.1 I

30-Jul-18 HORSERADISH LEAVES BE-7 421.9 +/- 130.6 30-Jul-18 HORSERADISH LEAVES K-40 . 5,086.6 +/- 435.4 30-Jul-18 HORSERADISH LEAVES MN-54 < 15.4 30-Jul-18 HORSERADISH LEAVES C0-58 < 12.5 30-Jul-18 HORSERADISH LEAVES FE-59 < 23.4 30-Jul-18 HORSERADISH LEAVES C0-60 < 9.0 30-Jul-18 HORSERADISH LEAVES ZN-65 < 38.3 30-Jul-18 HORSERADISH LEAVES ZR-NB-95 < 13.7 30-Jul-18 HORSERADISH LEAVES 1-131 < 18.5 30-Jul-18 HORSERADISH LEAVES CS-134 < 11.7 30-Jul-18 HORSERADISH LEAVES CS-137 < 7.5 13-Aug-18 HORSERADISH LEAVES BE-7 365.2 +/- 122.2 13-Aug-18 HORSERADISH LEAVES K-40 6,900.9 +/- 377.3 13-Aug-18 . HORSERADISH LEAVES MN-54 < 9.8 13-Aug-18 HORSERADISH LEAVES C0-58 < 6.5 13-Aug-18 HORSERADISH LEAVES FE-59 < 20.9 2018 Annual Radiological Envfronmental Operating Report Page C - 73 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Garden Location: Q-6 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 13-Aug-18 HORSERADISH LEAVES C0-60 < 6.7 13-Aug-18 HORSERADISH LEAVES ZN-65 < 17.6 13-Aug-18 HORSERADISH LEAVES ZR-NB-95 < 6.7 13-Aug-18 HORSERADISH LEAVES 1-131 < 15.9 13-Aug-18 HORSERADISH LEAVES CS-134 < 9.7 13-Aug-18 HORSERADISH LEAVES CS-137 < 9.4 2018 Annual Radiological Environmental Operating Report Page C - 74 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-D1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 05-Nov-18 IRRIGATED SOYBEANS BE-7 < 72.7 05-Nov-18 IRRIGATED SOYBEANS K-40 14,086.0 +/- 500.2 05-Nov-18 IRRIGATED SOYBEANS MN-54 < 11.0 05-Nov-18 IRRIGATED SOYBEANS C0-58 < 8.0 05-Nov-18 IRRIGATED SOYBEANS FE-59 < 21.7 05-Nov-18 IRRIGATED SOYBEANS C0-60 < 8.1 05-Nov-18 IRRIGATED SOYBEANS ZN-65' < 38.4 05-Nov-18 IRRIGATED SOYBEANS ZR-NB-95 < 13.4 05-Nov-18 IRRIGATED SOYBEANS 1.:.131 < 20.2 05-Nov-18 IRRIGATED SOYBEANS CS-134 < 9.0 05-Nov-18 IRRIGATED SOYBEANS CS-137 < 9.6 2018 Annual Radiological Environmental Operating Report Page C - 75 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-D2 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 04-0ct-18 IRRIGATED CORN BE-7 < 44.6 04-0ct-18 IRRIGATED CORN K-40 2,766.1 +/- 256.9 04-0ct-18 IRRIGATED CORN MN-54 < 6.8 04-0ct-18 IRRIGATED CORN C0-58 < 8.5 04-0ct-18 IRRIGATED CORN FE-59 < 13.0 04-0ct-18 IRRIGATED CORN C0-60 < 8.1 04-0ct-18 IRRIGATED CORN ZN-65 < 13.8 04-0ct-18 IRRIGATED CORN ZR-NB-95 < 7.2 04-0ct-18 IRRIGATED CORN 1-131 < 9.8 04-0ct-18 IRRIGATED CORN CS-134 < 8.7 04-0ct-18 IRRIGATED CORN CS-137 < 6.9 2018 Annual Radiological Environmental Operating Report Page C - 76 Wolf Creek Generating Station

Exposure Pathway - Ingestion Food/Crops Location: NR-U1 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 01-0ct-18 NON-IRRIGATED CORN BE-7 *< 59.3 01-0ct-18 NON-IRRIGATED CORN K-40 2,978.5 +/- 310.3 01-0ct-18 NON-IRRIGATED CORN MN-54 < 8.3 01-0ct-18 NON~IRRIGATED CORN C0-58 < 9.7 01-0ct-18 NON-IRRIGATED CORN FE-59 < 16.2 01-0ct-18 NON-IRRIGATED CORN C0-60 < 6.9 01-0ct-18 NON-IRRIGATED CORN ZN-65 < 13.2 01-0ct-18 NON-IRRIGATED CORN ZR-NB-95 < 8.3 01-0ct-18 NON-IRRIGATED CORN 1-131 < 14.4 01-0ct-18 NON-IRRIGATED CORN CS-134 < 8.7 01-0ct-18 NON-IRRIGATED CORN CS-137 < 7.1 2018 Annual Radiological Environmental Operating Report Page C - 77 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 08-May-18 BOTTOM SEDIMENT K-40 9,298.3 +/- 973.2 08-May-18 BOTTOM SEDIMENT MN-54 < 43.6 08-May-18 BOTTOM SEDIMENT C0-58 < 55.6 08-May-18 BOTTOM SEDIMENT FE-59 < 101.7 08-May-18 BOTTOM SEDIMENT C0-60 < 28.5 08-May-18 BOTTOM SEDIMENT 2;N-65 < 120.7 08-May-18 BOTTOM SEDIMENT CS-134 < 36.1 08-May-18 BOTTOM SEDIMENT CS-137 < 57.9 08-May-18 BOTTOM SEDIMENT FE-55 < 14,443.6 17-0ct-18 BOTTOM SEDIMENT K-40 13,441.0 +/- 1,001.0 17-0ct-18 BOTTOM SEDIMENT MN-54 < 39.9 17-0ct-18 BOTTOM SEDIMENT C0-58 < 60.6 17-0ct-18 BOTTOM SEDIMENT FE-59 < 58.9 17-0ct-18 BOTTOM SEDIMENT C0-60 < 18.4 17-0ct-18 BOTTOM SEDIMENT ZN-65 < 82.1 17-0ct-18 BOTTOM SEDIMENT CS-134 < 29.8 17-0ct-18 BOTTOM SEDIMENT CS-137 89.7 +/- 49.8 17-0ct-18 BOTTOM SEDIMENT FE-55 . < 14,698.0 2018 Annual Radiological Environmental Operating Report Page C - 78 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: ESW 2018-15 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 09-May-18 BOTTOM SEDIMENT K-40 11,833.0 +/- 692.8 09-May-18 BOTTOM SEDIMENT MN-54 < 29.6 09-May-18 BOTTOM SEDIMENT C0-58 < 30.9 09-May-18 BOTTOM SEDIMENT FE-59 < 51.6 09-May-18 BOTTOM SEDIMENT C0-60 < 23.8 09-May-18 BOTTOM SEDIMENT ZN-65 < 58.5 09-May-18 BOTTOM SEDIMENT CS-134 < 22.0 09-May-18 BOTTOM SEDIMENT CS-137 46.8 +/- 27.6 09-May-18 BOTTOM SEDIMENT FE-55 < 14,375.1 2018 Annual Radiological Environmental Operating Report Page C - 79 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: ESW 2018-16 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 22-0ct-18 BOTTOM SEDIMENT K-40 10,468.0 +/- 877.3 22-0ct-18 BOTTOM SEDIMENT MN-54 < 36.2 22-0ct-18 BOTTOM SEDIMENT C0-58 < 51.5 22-0ct-18 BOTTOM SEDIMENT FE-59 < 66.4 22-0ct-18 BOTTOM SEDIMENT C0-60 < 20.2 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 62.4 22-0ct-18 BOTTOM SEDIMENT CS-134 < 31.0 22-0ct-18 BOTTOM SEDIMENT CS-137 < 40.2 22-0ct-18 BOTTOM SEDIMENT FE-55 < 14,762.0 2018 Annual Radiological Environmental Operating Report Page C - 80 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: JRR Collection Sample Nuclide Concentration. Duplicate Date Description (pCi/Kg Dry) Analysis 09-May-18 BOTTOM SEDIMENT K-40 15,488.0 +/- 1,275.4 09-May-18 BOTTOM SEDIMENT MN-54 < 52.9 09-May-18 BOTTOM SEDIMENT C0-58 < 54.9 09-May-18 BOTTOM SEDIMENT FE-59 < 163.1 09-May-18 BOTTOM SEDIMENT C0-60 < 40.5 09-May-18 BOTTOM SEDIMENT ZN-65 < 92.3 09-May-18 BOTTOM SEDIMENT CS-134 < 48.5 09-May-18 BOTTOM SEDIMENT CS-137 < 46.9 29-Nov-18 BOTTOM SEDIMENT K-40 12,186.0 +/- 1,170.7 29-Nov-18 BOTTOM SEDIMENT MN-54 < 57.8 29-Nov-18 BOTTOM SEDIMENT C0-58 < 60.7 29-Nov-18

• BOTTOM SEDIMENT FE-59 < 110.8 29-Nov-18 BOTTOM SEDIMENT C0-60 < 40.8 29-Nov-18 BOTTOM SEDIMENT ZN-65 < 105.6 29-Nov-18 BOTTOM SEDIMENT CS-134 < 35.7 29-Nov-18 BOTTOM SEDIMENT CS-137 95.7 +/- 39.1 2018 Annual Radiological Environmental Operating Report Page C - 81 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 01-May-18 BOTTOM SEDIMENT K-40 10,322.0 +/- 713.9 01-May-18 BOTTOM SEDIMENT MN-54 < 34.1 01~May-18 BOTTOM SEDIMENT C0-58 < 33.0 01-May-18 BOTTOM SEDIMENT FE-59 < 102.2 01~May-18 BOTTOM SEDIMENT C0-60 < 18.2 01-May-18 BOTTOM SEDIMENT ZN-65 < 51.7 01-May-18 BOTTOM SEDIMENT CS-134 < 26.0 01-May-18 BOTTOM SEDIMENT CS-137 < 21.4

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2018 Annual Radiological Environm.ental Operating Report Page C - 82 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: SC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 01-May-18 BOTTOM SEDIMENT K-40 11,248.0 +/- 798.9

. 01-May-18 BOTTOM SEDIMENT MN-54 < 36.0 01-May-18 BOTTOM SEDIMENT C0-58 < 43.1 01-May-18 BOTTOM SEDIMENT FE-59 < 98.5 01-May-18 BOTTOM SEDIMENT C0-60 < 27.2 01-May-18 BOTTOM SEDIMENT ZN-65 < 65.4 01-May-18 BOTTOM SEDIMENT CS-134 < 27.0 01-May-18 BOTTOM SEDIMENT CS-137 < 33.5 2018 Annual Radiological Environmental Operating Report Page C - 83 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-57 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 09-May-18 BOTTOM SEDIMENT K-40 11,048.0 +/- 1,210.5 09-May-18 BOTTOM SEDIMENT MN-54 < 67.4 09-May-18 BOTTOM SEDIMENT C0-58 < 58.2 09-May-18 BOTTOM SEDIMENT FE-59 < 136.6 09-May-18 BOTTOM SEDIMENT C0-60 < 53.1 09-May-18 BOTTOM SEDIMENT ZN-65 < 126.4 09-May-18 BOTTOM SEDIMENT CS-134 < 51.1 09-May-18 BOTTOM SEDIMENT CS-137 < 48.0 09-May-18 BOTTOM SEDIMENT FE-55 < 14,712.4 2018 Annual Radiological Environmental Operating Report Page C - 84 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-58 Collection

• Sample Nuclide Concentration Duplicate Date Description* (pCi/Kg Dry) Analysis 09-May-18 BOTTOM SEDIMENT K-40 11,203.0 +/- 1,274.7 09-May-18 BOTTOM SEDIMENT MN-54 < 43.6 09-May-18 BOTTOM SEDIMENT C0-58 < 65.3 09-May:.18 BOTTOM SEDIMENT FE-59 < 171.6 09-May-18 BOTTOM SEDIMENT C0-60 < 53.5 09-May-18 BOTTOM SEDIMENT ZN-65 < 80.9 09-May-18 BOTTOM SEDIMENT CS-134 < 61.8 09-May-18 BOTTOM SEDIMENT CS-137 < 49.4 09-May-18 BOTTOM SEDIMENT FE-55 < 14,437.9 2018 Annual Radiological Environmental Operating Report Page C - 85 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-59 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 09-May-18 BOTTOM SEDIMENT K-40* 15,249.0 +/- 1,52a:a 09-May-18 BOTTOM SEDIMENT MN-54 < 60.7 09-May-18 BOTTOM SEDIMENT C0-58 < 72.4 09-May-18 BOTTOM SEDIMENT FE-59 < 150.2 09-May-18 BOTTOM SEDIMENT C0-60 < 54.4-09-May-18 BOTTOM SEDIMENT ZN-65 < 127.4 09-May-18 BOTTOM SEDIMENT CS-134. < 54.5 09~May-18 BOTTOM SEDIMENT CS-137 < 59.6

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09-May-18 BOTTOM SEDIMENT FE-55 < 14,835.9 2018 Annual Radiological Environmental Operating Report Page C - 86 Wolf Creek Generating Station

Expos!,Jre Pathway - Aquatic Bottom Sediment Location: UHS 2018-60 Collection Sample Nuclide Concentration Duplicate Date Description . (pCi/Kg Dry) Analysis 09-May~18 BOTTOM SEDIMENT K-40 11,821.0 +/- 1,314.9 09-May-18 BOTTOM SEDIMENT MN-54 < 70.8 09-May-18

• BOTTOM SEDIMENT C0-58 < 70.7 09-May-18 BOTTOM SEDIMENT FE-59 < 118.6 09-May-18 BOTTOM SEDIMENT C0-60 < 38.4 09-May-18 BOTTOM SEDIMENT ZN-65. < 142.0 09-May-18 BOTTOM SEDIMENT CS-134 < 49.5 09-May-18 BOTTOM SEDIMENT CS-137 84.0 +/- 49.3 09-May-18 BOTTOM SEDIMENT Nl-63 < 417.4

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09-May-18 BOTTOM SEDIMENT SR-89 < 73.4 09-May-18 BOTTOM SEDIMENT SR-90 32.4 +/- 17.7 09-May-18 BOTTOM SEDIMENT FE-55 < 14,363.0 2018 Annual Radiological Environmental Operating Report Page C - 87 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-61 Collection Sample Nuclide . Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 22-0ct-18 BOTTOM SEDIMENT K-40 10,024.0 +/- 856.4 22-0ct-18 BOTTOM SEDIMENT MN-54 < 48.7 22-0ct-18 BOTTOM SEDIMENT C0-58 < 46.1 22-0ct-18 BOTTOM SEDIMENT FE-59 < 59.6 22-0ct-18 BOTTOM SEDIMENT C0-60 < 20.7 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 100.9 22-0ct-18 BOTTOM SEDIMENT CS-134 < 29.4 22-0ct-18 BOTTOM SEDIMENT CS-137 < 39.9 22-0ct-18 BOTTOM SEDIMENT FE-55 < 13,934.0 2018 Annual Radiological Environmental Operating Report Page C - 88 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-62 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 22-0ct-18 BOTTOM SEDIMENT K-40 10,686.0 +/- 848.6 22-0ct-18 BOTTOM SEDIMENT K-40 10,686.0 +/- 848.6 22-0ct-18 BOTTOM SEDIMENT MN-54. < 44.1 22-0ct-18 BOTTOM SEDIMENT MN-54 < 44.1 22-0ct-18 BOTTOM SEDIMENT C0-58 < 54.5 22-0ct-18 BOTTOM SEDIMENT C0-58 < 54.5 22-0ct-18 BOTTOM SEDIMENT FE-59 < 122.0 22-0ct-18 BOTTOM SEDIMENT FE-59 < 122.0 22-0ct-18 BOTTOM SEDIMENT C0-60 < 29.0 22-0ct-18 BOTTOM SEDIMENT C0-60 < 29.0 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 79.0 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 79.0 22-0ct-18 BOTTOM SEDIMENT CS-134 < 35.1 22-0ct-18 BOTTOM SEDIMENT CS-134 < 35.1 22-0ct-18 BOTTOM SEDIMENT CS-137 < 43.6 22-0ct-18 BOTTOM SEDIMENT CS-137 < 43.6 22-0ct-18 BOTTOM SEDIMENT FE-55 < 14,494.0 22-0ct-18 BOTTOM SEDIMENT SR-90 32.6 +/- 18.4 22-0ct-18 BOTTOM SEDIMENT Nl-63 < 4.18.1 22-0ct-18 BOTTOM SEDIMENT SR-89 . < 79.2 2018 Annual Radiological Environmental Operating Report Page C - 89 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-63 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 22-0ct-18 BOTTOM SEDIMENT K-40 9,106.0 +/- 776.5 22-0ct-18 BOTTOM SEDIMENT MN-54 < 44.4 22-0ct-18 BOTTOM SEDIMENT C0-58 < 31.2 22-0ct-18 BOTTOM SEDIMENT FE-59 < 100.7 22-0ct-18 BOTTOM SEDIMENT C0-60 <" 24.2 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 69.2 22-0ct-18 BOTTOM SEDIMENT CS-134 < 23.1 22-0ct-18 BOTTOM SEDIMENT CS-137 < 39.7 22-0ct-18 BOTTOM SEDIMENT FE-55 < 13,542.0 2018 Annual Radiological Environmental Operating Report Page C -90 Wolf Creek Generating Station i .

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Exposure Pathway - Aquatic Bottom Sediment Location: UHS 2018-64 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 22-0ct-18 BOTTOM SEDIMENT K-40 10,562.0 +/- 868.2 22-0ct-18 BOTTOM SEDIMENT MN-54 < 43.9 22-0ct-18 BOTTOM SEDIMENT .C0-58 < 42.9 22-0ct-18 BOTTOM SEDIMENT FE-59 < 114.7 22-0ct-18 BOTTOM SEDIMENT C0-60 < 22.4 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 64.9 22-0ct-18 BOTTOM SEDIMENT CS-134 < *30_2 22-0ct-18 BOTTOM SEDIMENT CS-137 < 37.8 22-0ct-18 BOTTOM SEDIMENT FE-55 < 14,359.0 2018 Annual Radiological Environmental Operating Report Page C - 91

• Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS HS-15 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 09-May-18 BOTTOM SEDIMENT K-40 11,727.0 +/- 1,244.7 09:..May-18 BOTTOM SEDIMENT MN-54 < 38.4 09-May-18 BOTTOM SEDIMENT C0-58 < 40.2 09-May-18 BOTTOM SEDIMENT FE-59 < 151.6 09-May-18 BOTTOM SEDIMENT C0-60 < 46.1 09-May-18 BOTTOM SEDIMENT ZN-65 < 95.9 09-May-18 BOTTOM SEDIMENT CS-134 < 49.9 09-May-18 BOTTOM SEDIMENT CS-137 < 44.1 09-May-18 BOTTOM SEDIMENT FE-55 < 14,772.4 2018 Annual Radiological Environmental Operating Report Page C -92 Wolf Creek Generating Station

Exposure Pathway - Aquatic Bottom Sediment Location: UHS HS-16 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 22-0ct-18 BOTTOM SEDIMENT K-40 11,581.0 +/- 1,034.0 22-0ct-18 BOTTOM SEDIMENT MN-54 < 50.0 22-0ct-18 BOTTOM SEDIMENT C0-58 < 62.3 22-0ct-18 BOTTOM SEDIMENT FE-59 < *143.3 22-0ct-18 BOTTOM SEDIMENT C0-60 < 28.1 22-0ct-18 BOTTOM SEDIMENT ZN-65 < 74.5 22-0ct-18 BOTTOM SEDIMENT CS-134 < 40.1 22-0ct-18 BOTTOM SEDIMENT CS-137 < 50.5 22-0ct-18 BOTTOM SEDIMENT FE-55 < 13,704.0 2018 Annual Radiological Environmental Operating Report Page C -93 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: DC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 24-Jul-18 CATTAILS BE-7 . 243.5 +/- 86.8 24-Jul-18 CATTAILS K-40 2,505.7 +/- 192.2 24-Jul-18 CATTAILS MN-54 < 7.9 24-Jul-18 CATTAILS C0-58 < 5.7 24-Jul-18 CATTAILS FE-59 < 10.6 24-Jul-18 CATTAILS C0-60 < 7.7 24-Jul-18 CATTAILS ZN < 12.6 24-Jul-18 CATTAILS ZR-NB-95 < 11.7 24-Jul-18 CATTAILS 1-131 < 34.4 24-Jul-18 CATTAILS CS-134 < 8.3 24-Jul-18 CATTAILS CS-137 < 8.9 2018 Annual Radiological Environmental Operating Report Page C -94 Wolf Creek Generating Station .

Exposure Pathway - Aquatic Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 11-Jul-18 BRITTLE NAIAD BE-7 200.1 +/- 32.4 11-Jul-18 BRITTLE NAIAD K-40 2,175.3 +/- 65.4 11-Jul-18 BRITTLE NAIAD MN-54 < 2.6 11-Jul-18 BRITTLE NAIAD C0-58 < 2.8 11-Jul-18 BRITTLE NAIAD FE-59 < 4.2 11-Jul-18 BRITTLE NAIAD C0-60 < 2.1 11-Jul-18 BRITTLE NAIAD ZN-65 < 4.9 11-Jul-18 BRITTLE NAIAD ZR-NB-95 < 3.5 11-Jul-18 BRITTLE NAIAD 1-131 < 6.4 11-Jul-18 BRITTLE NAIAD CS-134 < 2.5 11-Jul-18 BRITTLE NAIAD CS-137 < 2.8 2018 Annual Radiological Environmental Operating Report Page C -95 Wolf Creek Generating Station

Exposure Pathway - Aquatic Vegetation Location: SC Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-Jun-18 CATTAILS BE-7 "< 188.4 12-Jun-18 CATTAILS K-40 2,245.6 +/- 229.6 12-Jun-18 * - CATTAILS MN-54 < 5.1 12-Jun-18 CATTAILS C0-58 < 7.2 12-Jun-18 CATTAILS FE-59 < 16.0 12-Jun-18 CATTAILS C0-60 < 4.4 12-Jun-18 CATTAILS ZN-65 < 7.2 12-Jun-18 CATTAILS ZR-NB-95 < 7.6 12-Jun CATTAILS 1-131 < 24.7 12-Jun-18 CATTAILS CS-134 < 8.1 12-Jun-18 CATTAILS CS-137 < 6.2 2018 Annual Radiological Environmental Operating Report Page C -96 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Vegetation

. Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 12-Jun-18 PASTURAGE BE-7 2,010.9 +/- 234.5 12-Jun-18 PASTURAGE K-40 8,309.2 +/- 545.3 12-Jun-18 PASTURAGE MN-54 < ' 16.9 12-Jun-18 PASTURAGE C0-58 < 15.0 12-Jun-18 PASTURAGE FE-59 < 28.0 12-Jun-18 PASTURAGE C0-60 * < 6.5 12-Jun-18 PASTURAGE ZN-65 < 31.8 12-Jun-18 PASTURAGE ZR-NB-95 * < 18.0 12-Jun-18 PASTURAGE 1-131 < 38.0 12-Jun-18 PASTURAGE CS-134 < 12.9 12-Jun-18 PASTURAGE CS-137 < 17.0 2018 Annual Radiological Environmental Operating Report Page C - 97 Wolf Creek Generating Station

Exposure Pathway - Terrestrial Vegetation Location: MUDS Collection Sample Nuclide Concentration Duplicate

• Date Description (pCi/Kg Wet) Analysis*

12-Jun-18 PASTURAGE BE-7 2,537.8 +/- 223.8 12-Jun-18 PASTURAGE K-40 3,714.8 +/- 323.3 12-Jun-18 PASTURAGE MN-54 < 13.0.

12-Jun-18 PASTURAGE C0-58 < 10.1 12-Jun-18 PASTURAGE FE-59 < 12.7 12-Jun-18 PASTURAGE C0-60 < 6.8 12-Jun-18 PASTURAGE; ZN-65 < 16.8 12-Jun-18 PASTURAGE ZR-NB-95 < 12.6 12-Jun-18 PASTURAGE 1-131 < 35.4 12-Jun-18 PASTURAGE CS-134 < 10.6 12-Jun.:18 PASTURAGE CS-137 < 6.5 I

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2018 Annual Radiological Environmental Operating Report Page C - 98 Wolf Creek Generating Station

Exposure Pathway

• Terrestrial Soil Location: EEA Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Dry) Analysis 01-May-18 SOIL K-40 11,760.0 +/- 816.3 01-May-18 SOIL MN-54 < 28.2 01-May-18 SOIL C0-58 < 44.6 01-May-18 SOIL FE-59 < 92.0 01-May-18 SOIL C0-60 < 25.6 01-May-18 SOIL ZN-65 < 105.4 01-May-18 SOIL CS-134 < 32.1 01-May-18 SOIL CS-137 181.9 +/- 33.3 2018 Annual Radiological Environmental Operating Report Page C

• 99 Wolf Creek Generating Station

Exposure Pathway - Ingestion Meat Location: A2.0 Collection Sample Nuclide Concentration Duplicate Date Description (pCi/Kg Wet) Analysis 18-Apr-18 WILD TURKEY K-40 2,940.4 +/- 377.2 18-Apr-18 WILD TURKEY MN-54 < 8.4 18-Apr-18 WILD TURKEY C0-58 < 13.7 18-Apr-18 WILD TURKEY FE-59 < 11.8 18-Apr-18 WILD TURKEY C0-60 < 9.5 18-Apr-18 WILD TURKEY ZN-65 < 22.5 18-Apr'-18 WILD TURKEY CS-134 < 16.3 18-Apr-18 WILD TURKEY CS-137 < 14.9 18-Apr-18 WILD TURKEY H-3 612.0 +/- 89.0 2018 Annual Radiological Environmental Operating Report Page C -100 Wolf Creek Generating Station

APPENDIX D LAND USE CENSUS REPORT 2018 Annual Radiological Environmental Operating Report Wolf Creek Generating Station

• I I WOLF CREEK GENERATING STATION 2018 LAND USE CENSUS REPORT Prepared by:

.-~~

• 10/04/18 Jon Matthew Vopat Date Peer Review:

~~X?~ 10/08/18 Teresa L. Rice Date Approved by:

r11

~"it---

10/08/18 James K. Rudeen Date 2018 Annual Radiological Environmental Operating Report D-1 Wolf Creek Generating Station

EXECUTIVE

SUMMARY

The annual Land Use Census of rural residents within five miles of the Wolf Creek Generating Station (WCGS) has been completed in 2018 in accordance with AP 078-004, [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 broad leaf 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 078-004 (locations A-3 and Q-6), no program changes are necessary regarding broadleaf vegetation locations.

BACKGROUND Section 5.2, Attachment A, of procedure AP 078-004, 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 078-004, 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 0/Q."

Table 5-1, Attachment A, of procedure AP 078-004, also requires that milk samples be collected from "three indicator locations within 5 miles of the site having the highest dose potential."

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

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

The information collected was compiled and the results are identified in Tables 1-3.

Calculations were performed so that garden locations could be ranked by their respective D/Q.

These result$ are contained in Table 4.

2018 Annual Radiological Environmental Operating Report D-2 Wolf Creek Generating Station

RESULTS Three changes were identified for the nearest occupied residence in each sector. Six changes*

were noted for the nearest garden producing broadleaf vegetation. There were no changes regarding milk sample locations. Again, no locations were identified that milked animals for human consumption.

2018 Annual Radiological Environmental Operating Report D-3 Wolf Creek Generating Station

• TABLE 1 2018 Land Use Census Data Location of Nearest:

Sector Residence Milking Animals Broadleaf Garden A A2.60-17TE1527 None A2.60-17TE1527 B B3.53-QURD1755 None None C C1 .92-16RD1655 None C3.58-RERD1675 D D2.33-RERD1520 None D3.00-16RD1829 E E1 .78-QULA1451 None None F F1 .76-14RD1730 None F3.37-14RD1904 G G3.03-13RD1820 None None H H3.09-12RD1711 None None J J3.70-11RD1540 None J3.70-11 RD1540 K K2.70-12LA1437 None K4.1 O-NARD1120 L L2.10-NARD1339 None L2.39-NARD1309 M M2.34-14RD1346 None M3. 78-L YRD1390 N N2.08-15RD1350 None N2.08-15RD1350 p P2. 76-HW751534 None P2.94-16RD1309 Q Q2.35-MILA1619 None Q2.35-MILA 1619 R R2.08-NALN1650 None None Identifiers are based upon the following protocol:

EXAMPLE: A2.60-17TE1527 "A" =Sector A "2.60" =2.60 miles from the reactor "17TE1527" =address 2018 Annual Radiological Environmental Operating Report D-4 Wolf Creek Generati~g Station

TABLE 2 SECTOR 2017 NEAREST 2018 NEAREST RESIDENCE RESIDENCE A A2.60-17TE1527 A2.60-17TE1527 B 83.53-QURD1755 83.53-QURD1755 C C2.00-16RD1715 C1.92-16RD1655 D D2.33-RERD1520 D2.33-RERD1520 E E1 .78-QULA1451 E1 .78-QULA 1451 F F1 .84-QULA1419 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. 70-12LA1439 K2.70-12LA1437 L L2.1O-NARD1339 L2.1O-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 2017 Land Use Census.

2018 Annual Radiological Environmental Operating Report D-5 Wolf Creek Generating Station

TABLE 3 2018 Land Use Census Milk and Garden Data

• SECTOR 2017 2018 2017 NEAREST 2018 NEAREST MILKING MILKING GARDEN GARDEN ANIMALS ANIMALS PRODUCING PRODUCING BROAD LEAF BROAD LEAF VEGETATION VEGETATION A None None A2.60-17TE1527 A2.60-17TE1527 B None.* None B4.09-18RD1739 None C None None C3.58-RERD1675 C3.58-RERD1675 D None None D3.00-16RD1829 D3.00-16RD1829 E None None None None F None None F3.37-14RD1904 F3.37-14RD1904 G None None G3.60-RERD1198 None H None None H3.09-12RD1711 None J None None J3.75-11 RD1580 J3.70-11RD1540 K None. None K4.1 O-NARD1120 K4.1 O-NARD1120 L . None None L2.39-NARD1309 L2.39-NARD1309 M None None M3:69-LYLA 1290 M3.78-LYRD1390 N None None N2.08-15RD1350 N2.08-15RD1350 p None None P4. 95-LADR339 P2.94-16RD1309 Q None None Q2.35-MILA1619 Q2.35-MILA1619 R None None None None NOTE: Underlined entries indicate changes from the 2017 Land Use Census.

2018 Annual Radiological Environmental Operating Report D-6 Wolf Creek Generating Station

TABLE 4.

Information Used for D/Q Calculations on Gardens Producing Broadleaf Vegetation FROM LAND USE FROM SA-16-004 DIST CALC NEAR NEAR FAR FAR SECTOR SECTOR (Ml) (METERS) DIST D/Q DIST D/Q CALC RANKING A 2.60 4184 4000 1.85E-09 5000 1.26E-09 1.74E-09 1 B

C 3.58 5761 5000 2.77E-10 6000 2.04E-10 2.21E-10 10 D 3.00 4828 4000 2.93E-10 5000 1.99E-10 2.15E-10 11 E

F 3.37 5423 5000 2.86E-10 6000 2.10E-10 2.54E-10 8 G

H J 3.70 5955 5000 6.06E-10 6000 4.46E-10 4.53E-10 6 K 4.10 6598 6000 3.88E-10 7000 2.88E-10 3.28E-10 7 L 2.39 3846 3000 *1.12E-09 4000 6.75E-10 7.44E-10 4 M 3.78 6083 6000 2.55E-10 7000 1.89E-10 2.50E-10 9 N 2.08 3347 3000 1.15E-09 4000 6.88E-10 9.90E-10 3 p 2.94 4731 4000 7.26E-10 5000 4.94E-10 5.56E-10 5 Q 2.35

• 3782 3000 1.51E-09 4000 9.04E-10 1.04E-09 2 R

Originated by: Date: 10/04/18 Verified by: Date:

10/08/18 2018 Annual Radiological Environmental Operating Report D-7 Wolf Creek Generating Station